1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 // SPDX-License-Identifier: GPL-2.0-or-later /* delayacct.c - per-task delay accounting * * Copyright (C) Shailabh Nagar, IBM Corp. 2006 */ #include <linux/sched.h> #include <linux/sched/task.h> #include <linux/sched/cputime.h> #include <linux/slab.h> #include <linux/taskstats.h> #include <linux/time.h> #include <linux/sysctl.h> #include <linux/delayacct.h> #include <linux/module.h> int delayacct_on __read_mostly = 1; /* Delay accounting turned on/off */ EXPORT_SYMBOL_GPL(delayacct_on); struct kmem_cache *delayacct_cache; static int __init delayacct_setup_disable(char *str) { delayacct_on = 0; return 1; } __setup("nodelayacct", delayacct_setup_disable); void delayacct_init(void) { delayacct_cache = KMEM_CACHE(task_delay_info, SLAB_PANIC|SLAB_ACCOUNT); delayacct_tsk_init(&init_task); } void __delayacct_tsk_init(struct task_struct *tsk) { tsk->delays = kmem_cache_zalloc(delayacct_cache, GFP_KERNEL); if (tsk->delays) raw_spin_lock_init(&tsk->delays->lock); } /* * Finish delay accounting for a statistic using its timestamps (@start), * accumalator (@total) and @count */ static void delayacct_end(raw_spinlock_t *lock, u64 *start, u64 *total, u32 *count) { s64 ns = ktime_get_ns() - *start; unsigned long flags; if (ns > 0) { raw_spin_lock_irqsave(lock, flags); *total += ns; (*count)++; raw_spin_unlock_irqrestore(lock, flags); } } void __delayacct_blkio_start(void) { current->delays->blkio_start = ktime_get_ns(); } /* * We cannot rely on the `current` macro, as we haven't yet switched back to * the process being woken. */ void __delayacct_blkio_end(struct task_struct *p) { struct task_delay_info *delays = p->delays; u64 *total; u32 *count; if (p->delays->flags & DELAYACCT_PF_SWAPIN) { total = &delays->swapin_delay; count = &delays->swapin_count; } else { total = &delays->blkio_delay; count = &delays->blkio_count; } delayacct_end(&delays->lock, &delays->blkio_start, total, count); } int __delayacct_add_tsk(struct taskstats *d, struct task_struct *tsk) { u64 utime, stime, stimescaled, utimescaled; unsigned long long t2, t3; unsigned long flags, t1; s64 tmp; task_cputime(tsk, &utime, &stime); tmp = (s64)d->cpu_run_real_total; tmp += utime + stime; d->cpu_run_real_total = (tmp < (s64)d->cpu_run_real_total) ? 0 : tmp; task_cputime_scaled(tsk, &utimescaled, &stimescaled); tmp = (s64)d->cpu_scaled_run_real_total; tmp += utimescaled + stimescaled; d->cpu_scaled_run_real_total = (tmp < (s64)d->cpu_scaled_run_real_total) ? 0 : tmp; /* * No locking available for sched_info (and too expensive to add one) * Mitigate by taking snapshot of values */ t1 = tsk->sched_info.pcount; t2 = tsk->sched_info.run_delay; t3 = tsk->se.sum_exec_runtime; d->cpu_count += t1; tmp = (s64)d->cpu_delay_total + t2; d->cpu_delay_total = (tmp < (s64)d->cpu_delay_total) ? 0 : tmp; tmp = (s64)d->cpu_run_virtual_total + t3; d->cpu_run_virtual_total = (tmp < (s64)d->cpu_run_virtual_total) ? 0 : tmp; /* zero XXX_total, non-zero XXX_count implies XXX stat overflowed */ raw_spin_lock_irqsave(&tsk->delays->lock, flags); tmp = d->blkio_delay_total + tsk->delays->blkio_delay; d->blkio_delay_total = (tmp < d->blkio_delay_total) ? 0 : tmp; tmp = d->swapin_delay_total + tsk->delays->swapin_delay; d->swapin_delay_total = (tmp < d->swapin_delay_total) ? 0 : tmp; tmp = d->freepages_delay_total + tsk->delays->freepages_delay; d->freepages_delay_total = (tmp < d->freepages_delay_total) ? 0 : tmp; tmp = d->thrashing_delay_total + tsk->delays->thrashing_delay; d->thrashing_delay_total = (tmp < d->thrashing_delay_total) ? 0 : tmp; d->blkio_count += tsk->delays->blkio_count; d->swapin_count += tsk->delays->swapin_count; d->freepages_count += tsk->delays->freepages_count; d->thrashing_count += tsk->delays->thrashing_count; raw_spin_unlock_irqrestore(&tsk->delays->lock, flags); return 0; } __u64 __delayacct_blkio_ticks(struct task_struct *tsk) { __u64 ret; unsigned long flags; raw_spin_lock_irqsave(&tsk->delays->lock, flags); ret = nsec_to_clock_t(tsk->delays->blkio_delay + tsk->delays->swapin_delay); raw_spin_unlock_irqrestore(&tsk->delays->lock, flags); return ret; } void __delayacct_freepages_start(void) { current->delays->freepages_start = ktime_get_ns(); } void __delayacct_freepages_end(void) { delayacct_end( &current->delays->lock, &current->delays->freepages_start, &current->delays->freepages_delay, &current->delays->freepages_count); } void __delayacct_thrashing_start(void) { current->delays->thrashing_start = ktime_get_ns(); } void __delayacct_thrashing_end(void) { delayacct_end(&current->delays->lock, &current->delays->thrashing_start, &current->delays->thrashing_delay, &current->delays->thrashing_count); }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 #ifndef _LINUX_HASH_H #define _LINUX_HASH_H /* Fast hashing routine for ints, longs and pointers. (C) 2002 Nadia Yvette Chambers, IBM */ #include <asm/types.h> #include <linux/compiler.h> /* * The "GOLDEN_RATIO_PRIME" is used in ifs/btrfs/brtfs_inode.h and * fs/inode.c. It's not actually prime any more (the previous primes * were actively bad for hashing), but the name remains. */ #if BITS_PER_LONG == 32 #define GOLDEN_RATIO_PRIME GOLDEN_RATIO_32 #define hash_long(val, bits) hash_32(val, bits) #elif BITS_PER_LONG == 64 #define hash_long(val, bits) hash_64(val, bits) #define GOLDEN_RATIO_PRIME GOLDEN_RATIO_64 #else #error Wordsize not 32 or 64 #endif /* * This hash multiplies the input by a large odd number and takes the * high bits. Since multiplication propagates changes to the most * significant end only, it is essential that the high bits of the * product be used for the hash value. * * Chuck Lever verified the effectiveness of this technique: * http://www.citi.umich.edu/techreports/reports/citi-tr-00-1.pdf * * Although a random odd number will do, it turns out that the golden * ratio phi = (sqrt(5)-1)/2, or its negative, has particularly nice * properties. (See Knuth vol 3, section 6.4, exercise 9.) * * These are the negative, (1 - phi) = phi**2 = (3 - sqrt(5))/2, * which is very slightly easier to multiply by and makes no * difference to the hash distribution. */ #define GOLDEN_RATIO_32 0x61C88647 #define GOLDEN_RATIO_64 0x61C8864680B583EBull #ifdef CONFIG_HAVE_ARCH_HASH /* This header may use the GOLDEN_RATIO_xx constants */ #include <asm/hash.h> #endif /* * The _generic versions exist only so lib/test_hash.c can compare * the arch-optimized versions with the generic. * * Note that if you change these, any <asm/hash.h> that aren't updated * to match need to have their HAVE_ARCH_* define values updated so the * self-test will not false-positive. */ #ifndef HAVE_ARCH__HASH_32 #define __hash_32 __hash_32_generic #endif static inline u32 __hash_32_generic(u32 val) { return val * GOLDEN_RATIO_32; } #ifndef HAVE_ARCH_HASH_32 #define hash_32 hash_32_generic #endif static inline u32 hash_32_generic(u32 val, unsigned int bits) { /* High bits are more random, so use them. */ return __hash_32(val) >> (32 - bits); } #ifndef HAVE_ARCH_HASH_64 #define hash_64 hash_64_generic #endif static __always_inline u32 hash_64_generic(u64 val, unsigned int bits) { #if BITS_PER_LONG == 64 /* 64x64-bit multiply is efficient on all 64-bit processors */ return val * GOLDEN_RATIO_64 >> (64 - bits); #else /* Hash 64 bits using only 32x32-bit multiply. */ return hash_32((u32)val ^ __hash_32(val >> 32), bits); #endif } static inline u32 hash_ptr(const void *ptr, unsigned int bits) { return hash_long((unsigned long)ptr, bits); } /* This really should be called fold32_ptr; it does no hashing to speak of. */ static inline u32 hash32_ptr(const void *ptr) { unsigned long val = (unsigned long)ptr; #if BITS_PER_LONG == 64 val ^= (val >> 32); #endif return (u32)val; } #endif /* _LINUX_HASH_H */
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_PERCPU_COUNTER_H #define _LINUX_PERCPU_COUNTER_H /* * A simple "approximate counter" for use in ext2 and ext3 superblocks. * * WARNING: these things are HUGE. 4 kbytes per counter on 32-way P4. */ #include <linux/spinlock.h> #include <linux/smp.h> #include <linux/list.h> #include <linux/threads.h> #include <linux/percpu.h> #include <linux/types.h> #include <linux/gfp.h> #ifdef CONFIG_SMP struct percpu_counter { raw_spinlock_t lock; s64 count; #ifdef CONFIG_HOTPLUG_CPU struct list_head list; /* All percpu_counters are on a list */ #endif s32 __percpu *counters; }; extern int percpu_counter_batch; int __percpu_counter_init(struct percpu_counter *fbc, s64 amount, gfp_t gfp, struct lock_class_key *key); #define percpu_counter_init(fbc, value, gfp) \ ({ \ static struct lock_class_key __key; \ \ __percpu_counter_init(fbc, value, gfp, &__key); \ }) void percpu_counter_destroy(struct percpu_counter *fbc); void percpu_counter_set(struct percpu_counter *fbc, s64 amount); void percpu_counter_add_batch(struct percpu_counter *fbc, s64 amount, s32 batch); s64 __percpu_counter_sum(struct percpu_counter *fbc); int __percpu_counter_compare(struct percpu_counter *fbc, s64 rhs, s32 batch); void percpu_counter_sync(struct percpu_counter *fbc); static inline int percpu_counter_compare(struct percpu_counter *fbc, s64 rhs) { return __percpu_counter_compare(fbc, rhs, percpu_counter_batch); } static inline void percpu_counter_add(struct percpu_counter *fbc, s64 amount) { percpu_counter_add_batch(fbc, amount, percpu_counter_batch); } static inline s64 percpu_counter_sum_positive(struct percpu_counter *fbc) { s64 ret = __percpu_counter_sum(fbc); return ret < 0 ? 0 : ret; } static inline s64 percpu_counter_sum(struct percpu_counter *fbc) { return __percpu_counter_sum(fbc); } static inline s64 percpu_counter_read(struct percpu_counter *fbc) { return fbc->count; } /* * It is possible for the percpu_counter_read() to return a small negative * number for some counter which should never be negative. * */ static inline s64 percpu_counter_read_positive(struct percpu_counter *fbc) { /* Prevent reloads of fbc->count */ s64 ret = READ_ONCE(fbc->count); if (ret >= 0) return ret; return 0; } static inline bool percpu_counter_initialized(struct percpu_counter *fbc) { return (fbc->counters != NULL); } #else /* !CONFIG_SMP */ struct percpu_counter { s64 count; }; static inline int percpu_counter_init(struct percpu_counter *fbc, s64 amount, gfp_t gfp) { fbc->count = amount; return 0; } static inline void percpu_counter_destroy(struct percpu_counter *fbc) { } static inline void percpu_counter_set(struct percpu_counter *fbc, s64 amount) { fbc->count = amount; } static inline int percpu_counter_compare(struct percpu_counter *fbc, s64 rhs) { if (fbc->count > rhs) return 1; else if (fbc->count < rhs) return -1; else return 0; } static inline int __percpu_counter_compare(struct percpu_counter *fbc, s64 rhs, s32 batch) { return percpu_counter_compare(fbc, rhs); } static inline void percpu_counter_add(struct percpu_counter *fbc, s64 amount) { preempt_disable(); fbc->count += amount; preempt_enable(); } static inline void percpu_counter_add_batch(struct percpu_counter *fbc, s64 amount, s32 batch) { percpu_counter_add(fbc, amount); } static inline s64 percpu_counter_read(struct percpu_counter *fbc) { return fbc->count; } /* * percpu_counter is intended to track positive numbers. In the UP case the * number should never be negative. */ static inline s64 percpu_counter_read_positive(struct percpu_counter *fbc) { return fbc->count; } static inline s64 percpu_counter_sum_positive(struct percpu_counter *fbc) { return percpu_counter_read_positive(fbc); } static inline s64 percpu_counter_sum(struct percpu_counter *fbc) { return percpu_counter_read(fbc); } static inline bool percpu_counter_initialized(struct percpu_counter *fbc) { return true; } static inline void percpu_counter_sync(struct percpu_counter *fbc) { } #endif /* CONFIG_SMP */ static inline void percpu_counter_inc(struct percpu_counter *fbc) { percpu_counter_add(fbc, 1); } static inline void percpu_counter_dec(struct percpu_counter *fbc) { percpu_counter_add(fbc, -1); } static inline void percpu_counter_sub(struct percpu_counter *fbc, s64 amount) { percpu_counter_add(fbc, -amount); } #endif /* _LINUX_PERCPU_COUNTER_H */
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _MM_PERCPU_INTERNAL_H #define _MM_PERCPU_INTERNAL_H #include <linux/types.h> #include <linux/percpu.h> /* * There are two chunk types: root and memcg-aware. * Chunks of each type have separate slots list. * * Memcg-aware chunks have an attached vector of obj_cgroup pointers, which is * used to store memcg membership data of a percpu object. Obj_cgroups are * ref-counted pointers to a memory cgroup with an ability to switch dynamically * to the parent memory cgroup. This allows to reclaim a deleted memory cgroup * without reclaiming of all outstanding objects, which hold a reference at it. */ enum pcpu_chunk_type { PCPU_CHUNK_ROOT, #ifdef CONFIG_MEMCG_KMEM PCPU_CHUNK_MEMCG, #endif PCPU_NR_CHUNK_TYPES, PCPU_FAIL_ALLOC = PCPU_NR_CHUNK_TYPES }; /* * pcpu_block_md is the metadata block struct. * Each chunk's bitmap is split into a number of full blocks. * All units are in terms of bits. * * The scan hint is the largest known contiguous area before the contig hint. * It is not necessarily the actual largest contig hint though. There is an * invariant that the scan_hint_start > contig_hint_start iff * scan_hint == contig_hint. This is necessary because when scanning forward, * we don't know if a new contig hint would be better than the current one. */ struct pcpu_block_md { int scan_hint; /* scan hint for block */ int scan_hint_start; /* block relative starting position of the scan hint */ int contig_hint; /* contig hint for block */ int contig_hint_start; /* block relative starting position of the contig hint */ int left_free; /* size of free space along the left side of the block */ int right_free; /* size of free space along the right side of the block */ int first_free; /* block position of first free */ int nr_bits; /* total bits responsible for */ }; struct pcpu_chunk { #ifdef CONFIG_PERCPU_STATS int nr_alloc; /* # of allocations */ size_t max_alloc_size; /* largest allocation size */ #endif struct list_head list; /* linked to pcpu_slot lists */ int free_bytes; /* free bytes in the chunk */ struct pcpu_block_md chunk_md; void *base_addr; /* base address of this chunk */ unsigned long *alloc_map; /* allocation map */ unsigned long *bound_map; /* boundary map */ struct pcpu_block_md *md_blocks; /* metadata blocks */ void *data; /* chunk data */ bool immutable; /* no [de]population allowed */ int start_offset; /* the overlap with the previous region to have a page aligned base_addr */ int end_offset; /* additional area required to have the region end page aligned */ #ifdef CONFIG_MEMCG_KMEM struct obj_cgroup **obj_cgroups; /* vector of object cgroups */ #endif int nr_pages; /* # of pages served by this chunk */ int nr_populated; /* # of populated pages */ int nr_empty_pop_pages; /* # of empty populated pages */ unsigned long populated[]; /* populated bitmap */ }; extern spinlock_t pcpu_lock; extern struct list_head *pcpu_chunk_lists; extern int pcpu_nr_slots; extern int pcpu_nr_empty_pop_pages[]; extern struct pcpu_chunk *pcpu_first_chunk; extern struct pcpu_chunk *pcpu_reserved_chunk; /** * pcpu_chunk_nr_blocks - converts nr_pages to # of md_blocks * @chunk: chunk of interest * * This conversion is from the number of physical pages that the chunk * serves to the number of bitmap blocks used. */ static inline int pcpu_chunk_nr_blocks(struct pcpu_chunk *chunk) { return chunk->nr_pages * PAGE_SIZE / PCPU_BITMAP_BLOCK_SIZE; } /** * pcpu_nr_pages_to_map_bits - converts the pages to size of bitmap * @pages: number of physical pages * * This conversion is from physical pages to the number of bits * required in the bitmap. */ static inline int pcpu_nr_pages_to_map_bits(int pages) { return pages * PAGE_SIZE / PCPU_MIN_ALLOC_SIZE; } /** * pcpu_chunk_map_bits - helper to convert nr_pages to size of bitmap * @chunk: chunk of interest * * This conversion is from the number of physical pages that the chunk * serves to the number of bits in the bitmap. */ static inline int pcpu_chunk_map_bits(struct pcpu_chunk *chunk) { return pcpu_nr_pages_to_map_bits(chunk->nr_pages); } #ifdef CONFIG_MEMCG_KMEM static inline enum pcpu_chunk_type pcpu_chunk_type(struct pcpu_chunk *chunk) { if (chunk->obj_cgroups) return PCPU_CHUNK_MEMCG; return PCPU_CHUNK_ROOT; } static inline bool pcpu_is_memcg_chunk(enum pcpu_chunk_type chunk_type) { return chunk_type == PCPU_CHUNK_MEMCG; } #else static inline enum pcpu_chunk_type pcpu_chunk_type(struct pcpu_chunk *chunk) { return PCPU_CHUNK_ROOT; } static inline bool pcpu_is_memcg_chunk(enum pcpu_chunk_type chunk_type) { return false; } #endif static inline struct list_head *pcpu_chunk_list(enum pcpu_chunk_type chunk_type) { return &pcpu_chunk_lists[pcpu_nr_slots * pcpu_is_memcg_chunk(chunk_type)]; } #ifdef CONFIG_PERCPU_STATS #include <linux/spinlock.h> struct percpu_stats { u64 nr_alloc; /* lifetime # of allocations */ u64 nr_dealloc; /* lifetime # of deallocations */ u64 nr_cur_alloc; /* current # of allocations */ u64 nr_max_alloc; /* max # of live allocations */ u32 nr_chunks; /* current # of live chunks */ u32 nr_max_chunks; /* max # of live chunks */ size_t min_alloc_size; /* min allocaiton size */ size_t max_alloc_size; /* max allocation size */ }; extern struct percpu_stats pcpu_stats; extern struct pcpu_alloc_info pcpu_stats_ai; /* * For debug purposes. We don't care about the flexible array. */ static inline void pcpu_stats_save_ai(const struct pcpu_alloc_info *ai) { memcpy(&pcpu_stats_ai, ai, sizeof(struct pcpu_alloc_info)); /* initialize min_alloc_size to unit_size */ pcpu_stats.min_alloc_size = pcpu_stats_ai.unit_size; } /* * pcpu_stats_area_alloc - increment area allocation stats * @chunk: the location of the area being allocated * @size: size of area to allocate in bytes * * CONTEXT: * pcpu_lock. */ static inline void pcpu_stats_area_alloc(struct pcpu_chunk *chunk, size_t size) { lockdep_assert_held(&pcpu_lock); pcpu_stats.nr_alloc++; pcpu_stats.nr_cur_alloc++; pcpu_stats.nr_max_alloc = max(pcpu_stats.nr_max_alloc, pcpu_stats.nr_cur_alloc); pcpu_stats.min_alloc_size = min(pcpu_stats.min_alloc_size, size); pcpu_stats.max_alloc_size = max(pcpu_stats.max_alloc_size, size); chunk->nr_alloc++; chunk->max_alloc_size = max(chunk->max_alloc_size, size); } /* * pcpu_stats_area_dealloc - decrement allocation stats * @chunk: the location of the area being deallocated * * CONTEXT: * pcpu_lock. */ static inline void pcpu_stats_area_dealloc(struct pcpu_chunk *chunk) { lockdep_assert_held(&pcpu_lock); pcpu_stats.nr_dealloc++; pcpu_stats.nr_cur_alloc--; chunk->nr_alloc--; } /* * pcpu_stats_chunk_alloc - increment chunk stats */ static inline void pcpu_stats_chunk_alloc(void) { unsigned long flags; spin_lock_irqsave(&pcpu_lock, flags); pcpu_stats.nr_chunks++; pcpu_stats.nr_max_chunks = max(pcpu_stats.nr_max_chunks, pcpu_stats.nr_chunks); spin_unlock_irqrestore(&pcpu_lock, flags); } /* * pcpu_stats_chunk_dealloc - decrement chunk stats */ static inline void pcpu_stats_chunk_dealloc(void) { unsigned long flags; spin_lock_irqsave(&pcpu_lock, flags); pcpu_stats.nr_chunks--; spin_unlock_irqrestore(&pcpu_lock, flags); } #else static inline void pcpu_stats_save_ai(const struct pcpu_alloc_info *ai) { } static inline void pcpu_stats_area_alloc(struct pcpu_chunk *chunk, size_t size) { } static inline void pcpu_stats_area_dealloc(struct pcpu_chunk *chunk) { } static inline void pcpu_stats_chunk_alloc(void) { } static inline void pcpu_stats_chunk_dealloc(void) { } #endif /* !CONFIG_PERCPU_STATS */ #endif
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 #ifndef _LINUX_JHASH_H #define _LINUX_JHASH_H /* jhash.h: Jenkins hash support. * * Copyright (C) 2006. Bob Jenkins (bob_jenkins@burtleburtle.net) * * https://burtleburtle.net/bob/hash/ * * These are the credits from Bob's sources: * * lookup3.c, by Bob Jenkins, May 2006, Public Domain. * * These are functions for producing 32-bit hashes for hash table lookup. * hashword(), hashlittle(), hashlittle2(), hashbig(), mix(), and final() * are externally useful functions. Routines to test the hash are included * if SELF_TEST is defined. You can use this free for any purpose. It's in * the public domain. It has no warranty. * * Copyright (C) 2009-2010 Jozsef Kadlecsik (kadlec@netfilter.org) * * I've modified Bob's hash to be useful in the Linux kernel, and * any bugs present are my fault. * Jozsef */ #include <linux/bitops.h> #include <linux/unaligned/packed_struct.h> /* Best hash sizes are of power of two */ #define jhash_size(n) ((u32)1<<(n)) /* Mask the hash value, i.e (value & jhash_mask(n)) instead of (value % n) */ #define jhash_mask(n) (jhash_size(n)-1) /* __jhash_mix -- mix 3 32-bit values reversibly. */ #define __jhash_mix(a, b, c) \ { \ a -= c; a ^= rol32(c, 4); c += b; \ b -= a; b ^= rol32(a, 6); a += c; \ c -= b; c ^= rol32(b, 8); b += a; \ a -= c; a ^= rol32(c, 16); c += b; \ b -= a; b ^= rol32(a, 19); a += c; \ c -= b; c ^= rol32(b, 4); b += a; \ } /* __jhash_final - final mixing of 3 32-bit values (a,b,c) into c */ #define __jhash_final(a, b, c) \ { \ c ^= b; c -= rol32(b, 14); \ a ^= c; a -= rol32(c, 11); \ b ^= a; b -= rol32(a, 25); \ c ^= b; c -= rol32(b, 16); \ a ^= c; a -= rol32(c, 4); \ b ^= a; b -= rol32(a, 14); \ c ^= b; c -= rol32(b, 24); \ } /* An arbitrary initial parameter */ #define JHASH_INITVAL 0xdeadbeef /* jhash - hash an arbitrary key * @k: sequence of bytes as key * @length: the length of the key * @initval: the previous hash, or an arbitray value * * The generic version, hashes an arbitrary sequence of bytes. * No alignment or length assumptions are made about the input key. * * Returns the hash value of the key. The result depends on endianness. */ static inline u32 jhash(const void *key, u32 length, u32 initval) { u32 a, b, c; const u8 *k = key; /* Set up the internal state */ a = b = c = JHASH_INITVAL + length + initval; /* All but the last block: affect some 32 bits of (a,b,c) */ while (length > 12) { a += __get_unaligned_cpu32(k); b += __get_unaligned_cpu32(k + 4); c += __get_unaligned_cpu32(k + 8); __jhash_mix(a, b, c); length -= 12; k += 12; } /* Last block: affect all 32 bits of (c) */ switch (length) { case 12: c += (u32)k[11]<<24; fallthrough; case 11: c += (u32)k[10]<<16; fallthrough; case 10: c += (u32)k[9]<<8; fallthrough; case 9: c += k[8]; fallthrough; case 8: b += (u32)k[7]<<24; fallthrough; case 7: b += (u32)k[6]<<16; fallthrough; case 6: b += (u32)k[5]<<8; fallthrough; case 5: b += k[4]; fallthrough; case 4: a += (u32)k[3]<<24; fallthrough; case 3: a += (u32)k[2]<<16; fallthrough; case 2: a += (u32)k[1]<<8; fallthrough; case 1: a += k[0]; __jhash_final(a, b, c); break; case 0: /* Nothing left to add */ break; } return c; } /* jhash2 - hash an array of u32's * @k: the key which must be an array of u32's * @length: the number of u32's in the key * @initval: the previous hash, or an arbitray value * * Returns the hash value of the key. */ static inline u32 jhash2(const u32 *k, u32 length, u32 initval) { u32 a, b, c; /* Set up the internal state */ a = b = c = JHASH_INITVAL + (length<<2) + initval; /* Handle most of the key */ while (length > 3) { a += k[0]; b += k[1]; c += k[2]; __jhash_mix(a, b, c); length -= 3; k += 3; } /* Handle the last 3 u32's */ switch (length) { case 3: c += k[2]; fallthrough; case 2: b += k[1]; fallthrough; case 1: a += k[0]; __jhash_final(a, b, c); break; case 0: /* Nothing left to add */ break; } return c; } /* __jhash_nwords - hash exactly 3, 2 or 1 word(s) */ static inline u32 __jhash_nwords(u32 a, u32 b, u32 c, u32 initval) { a += initval; b += initval; c += initval; __jhash_final(a, b, c); return c; } static inline u32 jhash_3words(u32 a, u32 b, u32 c, u32 initval) { return __jhash_nwords(a, b, c, initval + JHASH_INITVAL + (3 << 2)); } static inline u32 jhash_2words(u32 a, u32 b, u32 initval) { return __jhash_nwords(a, b, 0, initval + JHASH_INITVAL + (2 << 2)); } static inline u32 jhash_1word(u32 a, u32 initval) { return __jhash_nwords(a, 0, 0, initval + JHASH_INITVAL + (1 << 2)); } #endif /* _LINUX_JHASH_H */
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 /* SPDX-License-Identifier: GPL-2.0 */ /* * sysctl.h: General linux system control interface * * Begun 24 March 1995, Stephen Tweedie * **************************************************************** **************************************************************** ** ** WARNING: ** The values in this file are exported to user space via ** the sysctl() binary interface. Do *NOT* change the ** numbering of any existing values here, and do not change ** any numbers within any one set of values. If you have to ** redefine an existing interface, use a new number for it. ** The kernel will then return -ENOTDIR to any application using ** the old binary interface. ** **************************************************************** **************************************************************** */ #ifndef _LINUX_SYSCTL_H #define _LINUX_SYSCTL_H #include <linux/list.h> #include <linux/rcupdate.h> #include <linux/wait.h> #include <linux/rbtree.h> #include <linux/uidgid.h> #include <uapi/linux/sysctl.h> /* For the /proc/sys support */ struct completion; struct ctl_table; struct nsproxy; struct ctl_table_root; struct ctl_table_header; struct ctl_dir; /* Keep the same order as in fs/proc/proc_sysctl.c */ #define SYSCTL_ZERO ((void *)&sysctl_vals[0]) #define SYSCTL_ONE ((void *)&sysctl_vals[1]) #define SYSCTL_INT_MAX ((void *)&sysctl_vals[2]) extern const int sysctl_vals[]; typedef int proc_handler(struct ctl_table *ctl, int write, void *buffer, size_t *lenp, loff_t *ppos); int proc_dostring(struct ctl_table *, int, void *, size_t *, loff_t *); int proc_dointvec(struct ctl_table *, int, void *, size_t *, loff_t *); int proc_douintvec(struct ctl_table *, int, void *, size_t *, loff_t *); int proc_dointvec_minmax(struct ctl_table *, int, void *, size_t *, loff_t *); int proc_douintvec_minmax(struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos); int proc_dointvec_jiffies(struct ctl_table *, int, void *, size_t *, loff_t *); int proc_dointvec_userhz_jiffies(struct ctl_table *, int, void *, size_t *, loff_t *); int proc_dointvec_ms_jiffies(struct ctl_table *, int, void *, size_t *, loff_t *); int proc_doulongvec_minmax(struct ctl_table *, int, void *, size_t *, loff_t *); int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int, void *, size_t *, loff_t *); int proc_do_large_bitmap(struct ctl_table *, int, void *, size_t *, loff_t *); int proc_do_static_key(struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos); /* * Register a set of sysctl names by calling register_sysctl_table * with an initialised array of struct ctl_table's. An entry with * NULL procname terminates the table. table->de will be * set up by the registration and need not be initialised in advance. * * sysctl names can be mirrored automatically under /proc/sys. The * procname supplied controls /proc naming. * * The table's mode will be honoured for proc-fs access. * * Leaf nodes in the sysctl tree will be represented by a single file * under /proc; non-leaf nodes will be represented by directories. A * null procname disables /proc mirroring at this node. * * The data and maxlen fields of the ctl_table * struct enable minimal validation of the values being written to be * performed, and the mode field allows minimal authentication. * * There must be a proc_handler routine for any terminal nodes * mirrored under /proc/sys (non-terminals are handled by a built-in * directory handler). Several default handlers are available to * cover common cases. */ /* Support for userspace poll() to watch for changes */ struct ctl_table_poll { atomic_t event; wait_queue_head_t wait; }; static inline void *proc_sys_poll_event(struct ctl_table_poll *poll) { return (void *)(unsigned long)atomic_read(&poll->event); } #define __CTL_TABLE_POLL_INITIALIZER(name) { \ .event = ATOMIC_INIT(0), \ .wait = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait) } #define DEFINE_CTL_TABLE_POLL(name) \ struct ctl_table_poll name = __CTL_TABLE_POLL_INITIALIZER(name) /* A sysctl table is an array of struct ctl_table: */ struct ctl_table { const char *procname; /* Text ID for /proc/sys, or zero */ void *data; int maxlen; umode_t mode; struct ctl_table *child; /* Deprecated */ proc_handler *proc_handler; /* Callback for text formatting */ struct ctl_table_poll *poll; void *extra1; void *extra2; } __randomize_layout; struct ctl_node { struct rb_node node; struct ctl_table_header *header; }; /* struct ctl_table_header is used to maintain dynamic lists of struct ctl_table trees. */ struct ctl_table_header { union { struct { struct ctl_table *ctl_table; int used; int count; int nreg; }; struct rcu_head rcu; }; struct completion *unregistering; struct ctl_table *ctl_table_arg; struct ctl_table_root *root; struct ctl_table_set *set; struct ctl_dir *parent; struct ctl_node *node; struct hlist_head inodes; /* head for proc_inode->sysctl_inodes */ }; struct ctl_dir { /* Header must be at the start of ctl_dir */ struct ctl_table_header header; struct rb_root root; }; struct ctl_table_set { int (*is_seen)(struct ctl_table_set *); struct ctl_dir dir; }; struct ctl_table_root { struct ctl_table_set default_set; struct ctl_table_set *(*lookup)(struct ctl_table_root *root); void (*set_ownership)(struct ctl_table_header *head, struct ctl_table *table, kuid_t *uid, kgid_t *gid); int (*permissions)(struct ctl_table_header *head, struct ctl_table *table); }; /* struct ctl_path describes where in the hierarchy a table is added */ struct ctl_path { const char *procname; }; #ifdef CONFIG_SYSCTL void proc_sys_poll_notify(struct ctl_table_poll *poll); extern void setup_sysctl_set(struct ctl_table_set *p, struct ctl_table_root *root, int (*is_seen)(struct ctl_table_set *)); extern void retire_sysctl_set(struct ctl_table_set *set); struct ctl_table_header *__register_sysctl_table( struct ctl_table_set *set, const char *path, struct ctl_table *table); struct ctl_table_header *__register_sysctl_paths( struct ctl_table_set *set, const struct ctl_path *path, struct ctl_table *table); struct ctl_table_header *register_sysctl(const char *path, struct ctl_table *table); struct ctl_table_header *register_sysctl_table(struct ctl_table * table); struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, struct ctl_table *table); void unregister_sysctl_table(struct ctl_table_header * table); extern int sysctl_init(void); void do_sysctl_args(void); extern int pwrsw_enabled; extern int unaligned_enabled; extern int unaligned_dump_stack; extern int no_unaligned_warning; extern struct ctl_table sysctl_mount_point[]; extern struct ctl_table random_table[]; extern struct ctl_table firmware_config_table[]; extern struct ctl_table epoll_table[]; #else /* CONFIG_SYSCTL */ static inline struct ctl_table_header *register_sysctl_table(struct ctl_table * table) { return NULL; } static inline struct ctl_table_header *register_sysctl_paths( const struct ctl_path *path, struct ctl_table *table) { return NULL; } static inline struct ctl_table_header *register_sysctl(const char *path, struct ctl_table *table) { return NULL; } static inline void unregister_sysctl_table(struct ctl_table_header * table) { } static inline void setup_sysctl_set(struct ctl_table_set *p, struct ctl_table_root *root, int (*is_seen)(struct ctl_table_set *)) { } static inline void do_sysctl_args(void) { } #endif /* CONFIG_SYSCTL */ int sysctl_max_threads(struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos); #endif /* _LINUX_SYSCTL_H */
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1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 /* SPDX-License-Identifier: GPL-2.0-or-later */ /* * linux/include/linux/jbd2.h * * Written by Stephen C. Tweedie <sct@redhat.com> * * Copyright 1998-2000 Red Hat, Inc --- All Rights Reserved * * Definitions for transaction data structures for the buffer cache * filesystem journaling support. */ #ifndef _LINUX_JBD2_H #define _LINUX_JBD2_H /* Allow this file to be included directly into e2fsprogs */ #ifndef __KERNEL__ #include "jfs_compat.h" #define JBD2_DEBUG #else #include <linux/types.h> #include <linux/buffer_head.h> #include <linux/journal-head.h> #include <linux/stddef.h> #include <linux/mutex.h> #include <linux/timer.h> #include <linux/slab.h> #include <linux/bit_spinlock.h> #include <linux/blkdev.h> #include <crypto/hash.h> #endif #define journal_oom_retry 1 /* * Define JBD2_PARANIOD_IOFAIL to cause a kernel BUG() if ext4 finds * certain classes of error which can occur due to failed IOs. Under * normal use we want ext4 to continue after such errors, because * hardware _can_ fail, but for debugging purposes when running tests on * known-good hardware we may want to trap these errors. */ #undef JBD2_PARANOID_IOFAIL /* * The default maximum commit age, in seconds. */ #define JBD2_DEFAULT_MAX_COMMIT_AGE 5 #ifdef CONFIG_JBD2_DEBUG /* * Define JBD2_EXPENSIVE_CHECKING to enable more expensive internal * consistency checks. By default we don't do this unless * CONFIG_JBD2_DEBUG is on. */ #define JBD2_EXPENSIVE_CHECKING extern ushort jbd2_journal_enable_debug; void __jbd2_debug(int level, const char *file, const char *func, unsigned int line, const char *fmt, ...); #define jbd_debug(n, fmt, a...) \ __jbd2_debug((n), __FILE__, __func__, __LINE__, (fmt), ##a) #else #define jbd_debug(n, fmt, a...) /**/ #endif extern void *jbd2_alloc(size_t size, gfp_t flags); extern void jbd2_free(void *ptr, size_t size); #define JBD2_MIN_JOURNAL_BLOCKS 1024 #define JBD2_MIN_FC_BLOCKS 256 #ifdef __KERNEL__ /** * typedef handle_t - The handle_t type represents a single atomic update being performed by some process. * * All filesystem modifications made by the process go * through this handle. Recursive operations (such as quota operations) * are gathered into a single update. * * The buffer credits field is used to account for journaled buffers * being modified by the running process. To ensure that there is * enough log space for all outstanding operations, we need to limit the * number of outstanding buffers possible at any time. When the * operation completes, any buffer credits not used are credited back to * the transaction, so that at all times we know how many buffers the * outstanding updates on a transaction might possibly touch. * * This is an opaque datatype. **/ typedef struct jbd2_journal_handle handle_t; /* Atomic operation type */ /** * typedef journal_t - The journal_t maintains all of the journaling state information for a single filesystem. * * journal_t is linked to from the fs superblock structure. * * We use the journal_t to keep track of all outstanding transaction * activity on the filesystem, and to manage the state of the log * writing process. * * This is an opaque datatype. **/ typedef struct journal_s journal_t; /* Journal control structure */ #endif /* * Internal structures used by the logging mechanism: */ #define JBD2_MAGIC_NUMBER 0xc03b3998U /* The first 4 bytes of /dev/random! */ /* * On-disk structures */ /* * Descriptor block types: */ #define JBD2_DESCRIPTOR_BLOCK 1 #define JBD2_COMMIT_BLOCK 2 #define JBD2_SUPERBLOCK_V1 3 #define JBD2_SUPERBLOCK_V2 4 #define JBD2_REVOKE_BLOCK 5 /* * Standard header for all descriptor blocks: */ typedef struct journal_header_s { __be32 h_magic; __be32 h_blocktype; __be32 h_sequence; } journal_header_t; /* * Checksum types. */ #define JBD2_CRC32_CHKSUM 1 #define JBD2_MD5_CHKSUM 2 #define JBD2_SHA1_CHKSUM 3 #define JBD2_CRC32C_CHKSUM 4 #define JBD2_CRC32_CHKSUM_SIZE 4 #define JBD2_CHECKSUM_BYTES (32 / sizeof(u32)) /* * Commit block header for storing transactional checksums: * * NOTE: If FEATURE_COMPAT_CHECKSUM (checksum v1) is set, the h_chksum* * fields are used to store a checksum of the descriptor and data blocks. * * If FEATURE_INCOMPAT_CSUM_V2 (checksum v2) is set, then the h_chksum * field is used to store crc32c(uuid+commit_block). Each journal metadata * block gets its own checksum, and data block checksums are stored in * journal_block_tag (in the descriptor). The other h_chksum* fields are * not used. * * If FEATURE_INCOMPAT_CSUM_V3 is set, the descriptor block uses * journal_block_tag3_t to store a full 32-bit checksum. Everything else * is the same as v2. * * Checksum v1, v2, and v3 are mutually exclusive features. */ struct commit_header { __be32 h_magic; __be32 h_blocktype; __be32 h_sequence; unsigned char h_chksum_type; unsigned char h_chksum_size; unsigned char h_padding[2]; __be32 h_chksum[JBD2_CHECKSUM_BYTES]; __be64 h_commit_sec; __be32 h_commit_nsec; }; /* * The block tag: used to describe a single buffer in the journal. * t_blocknr_high is only used if INCOMPAT_64BIT is set, so this * raw struct shouldn't be used for pointer math or sizeof() - use * journal_tag_bytes(journal) instead to compute this. */ typedef struct journal_block_tag3_s { __be32 t_blocknr; /* The on-disk block number */ __be32 t_flags; /* See below */ __be32 t_blocknr_high; /* most-significant high 32bits. */ __be32 t_checksum; /* crc32c(uuid+seq+block) */ } journal_block_tag3_t; typedef struct journal_block_tag_s { __be32 t_blocknr; /* The on-disk block number */ __be16 t_checksum; /* truncated crc32c(uuid+seq+block) */ __be16 t_flags; /* See below */ __be32 t_blocknr_high; /* most-significant high 32bits. */ } journal_block_tag_t; /* Tail of descriptor or revoke block, for checksumming */ struct jbd2_journal_block_tail { __be32 t_checksum; /* crc32c(uuid+descr_block) */ }; /* * The revoke descriptor: used on disk to describe a series of blocks to * be revoked from the log */ typedef struct jbd2_journal_revoke_header_s { journal_header_t r_header; __be32 r_count; /* Count of bytes used in the block */ } jbd2_journal_revoke_header_t; /* Definitions for the journal tag flags word: */ #define JBD2_FLAG_ESCAPE 1 /* on-disk block is escaped */ #define JBD2_FLAG_SAME_UUID 2 /* block has same uuid as previous */ #define JBD2_FLAG_DELETED 4 /* block deleted by this transaction */ #define JBD2_FLAG_LAST_TAG 8 /* last tag in this descriptor block */ /* * The journal superblock. All fields are in big-endian byte order. */ typedef struct journal_superblock_s { /* 0x0000 */ journal_header_t s_header; /* 0x000C */ /* Static information describing the journal */ __be32 s_blocksize; /* journal device blocksize */ __be32 s_maxlen; /* total blocks in journal file */ __be32 s_first; /* first block of log information */ /* 0x0018 */ /* Dynamic information describing the current state of the log */ __be32 s_sequence; /* first commit ID expected in log */ __be32 s_start; /* blocknr of start of log */ /* 0x0020 */ /* Error value, as set by jbd2_journal_abort(). */ __be32 s_errno; /* 0x0024 */ /* Remaining fields are only valid in a version-2 superblock */ __be32 s_feature_compat; /* compatible feature set */ __be32 s_feature_incompat; /* incompatible feature set */ __be32 s_feature_ro_compat; /* readonly-compatible feature set */ /* 0x0030 */ __u8 s_uuid[16]; /* 128-bit uuid for journal */ /* 0x0040 */ __be32 s_nr_users; /* Nr of filesystems sharing log */ __be32 s_dynsuper; /* Blocknr of dynamic superblock copy*/ /* 0x0048 */ __be32 s_max_transaction; /* Limit of journal blocks per trans.*/ __be32 s_max_trans_data; /* Limit of data blocks per trans. */ /* 0x0050 */ __u8 s_checksum_type; /* checksum type */ __u8 s_padding2[3]; /* 0x0054 */ __be32 s_num_fc_blks; /* Number of fast commit blocks */ /* 0x0058 */ __u32 s_padding[41]; __be32 s_checksum; /* crc32c(superblock) */ /* 0x0100 */ __u8 s_users[16*48]; /* ids of all fs'es sharing the log */ /* 0x0400 */ } journal_superblock_t; /* Use the jbd2_{has,set,clear}_feature_* helpers; these will be removed */ #define JBD2_HAS_COMPAT_FEATURE(j,mask) \ ((j)->j_format_version >= 2 && \ ((j)->j_superblock->s_feature_compat & cpu_to_be32((mask)))) #define JBD2_HAS_RO_COMPAT_FEATURE(j,mask) \ ((j)->j_format_version >= 2 && \ ((j)->j_superblock->s_feature_ro_compat & cpu_to_be32((mask)))) #define JBD2_HAS_INCOMPAT_FEATURE(j,mask) \ ((j)->j_format_version >= 2 && \ ((j)->j_superblock->s_feature_incompat & cpu_to_be32((mask)))) #define JBD2_FEATURE_COMPAT_CHECKSUM 0x00000001 #define JBD2_FEATURE_INCOMPAT_REVOKE 0x00000001 #define JBD2_FEATURE_INCOMPAT_64BIT 0x00000002 #define JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT 0x00000004 #define JBD2_FEATURE_INCOMPAT_CSUM_V2 0x00000008 #define JBD2_FEATURE_INCOMPAT_CSUM_V3 0x00000010 #define JBD2_FEATURE_INCOMPAT_FAST_COMMIT 0x00000020 /* See "journal feature predicate functions" below */ /* Features known to this kernel version: */ #define JBD2_KNOWN_COMPAT_FEATURES JBD2_FEATURE_COMPAT_CHECKSUM #define JBD2_KNOWN_ROCOMPAT_FEATURES 0 #define JBD2_KNOWN_INCOMPAT_FEATURES (JBD2_FEATURE_INCOMPAT_REVOKE | \ JBD2_FEATURE_INCOMPAT_64BIT | \ JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | \ JBD2_FEATURE_INCOMPAT_CSUM_V2 | \ JBD2_FEATURE_INCOMPAT_CSUM_V3 | \ JBD2_FEATURE_INCOMPAT_FAST_COMMIT) #ifdef __KERNEL__ #include <linux/fs.h> #include <linux/sched.h> enum jbd_state_bits { BH_JBD /* Has an attached ext3 journal_head */ = BH_PrivateStart, BH_JWrite, /* Being written to log (@@@ DEBUGGING) */ BH_Freed, /* Has been freed (truncated) */ BH_Revoked, /* Has been revoked from the log */ BH_RevokeValid, /* Revoked flag is valid */ BH_JBDDirty, /* Is dirty but journaled */ BH_JournalHead, /* Pins bh->b_private and jh->b_bh */ BH_Shadow, /* IO on shadow buffer is running */ BH_Verified, /* Metadata block has been verified ok */ BH_JBDPrivateStart, /* First bit available for private use by FS */ }; BUFFER_FNS(JBD, jbd) BUFFER_FNS(JWrite, jwrite) BUFFER_FNS(JBDDirty, jbddirty) TAS_BUFFER_FNS(JBDDirty, jbddirty) BUFFER_FNS(Revoked, revoked) TAS_BUFFER_FNS(Revoked, revoked) BUFFER_FNS(RevokeValid, revokevalid) TAS_BUFFER_FNS(RevokeValid, revokevalid) BUFFER_FNS(Freed, freed) BUFFER_FNS(Shadow, shadow) BUFFER_FNS(Verified, verified) static inline struct buffer_head *jh2bh(struct journal_head *jh) { return jh->b_bh; } static inline struct journal_head *bh2jh(struct buffer_head *bh) { return bh->b_private; } static inline void jbd_lock_bh_journal_head(struct buffer_head *bh) { bit_spin_lock(BH_JournalHead, &bh->b_state); } static inline void jbd_unlock_bh_journal_head(struct buffer_head *bh) { bit_spin_unlock(BH_JournalHead, &bh->b_state); } #define J_ASSERT(assert) BUG_ON(!(assert)) #define J_ASSERT_BH(bh, expr) J_ASSERT(expr) #define J_ASSERT_JH(jh, expr) J_ASSERT(expr) #if defined(JBD2_PARANOID_IOFAIL) #define J_EXPECT(expr, why...) J_ASSERT(expr) #define J_EXPECT_BH(bh, expr, why...) J_ASSERT_BH(bh, expr) #define J_EXPECT_JH(jh, expr, why...) J_ASSERT_JH(jh, expr) #else #define __journal_expect(expr, why...) \ ({ \ int val = (expr); \ if (!val) { \ printk(KERN_ERR \ "JBD2 unexpected failure: %s: %s;\n", \ __func__, #expr); \ printk(KERN_ERR why "\n"); \ } \ val; \ }) #define J_EXPECT(expr, why...) __journal_expect(expr, ## why) #define J_EXPECT_BH(bh, expr, why...) __journal_expect(expr, ## why) #define J_EXPECT_JH(jh, expr, why...) __journal_expect(expr, ## why) #endif /* Flags in jbd_inode->i_flags */ #define __JI_COMMIT_RUNNING 0 #define __JI_WRITE_DATA 1 #define __JI_WAIT_DATA 2 /* * Commit of the inode data in progress. We use this flag to protect us from * concurrent deletion of inode. We cannot use reference to inode for this * since we cannot afford doing last iput() on behalf of kjournald */ #define JI_COMMIT_RUNNING (1 << __JI_COMMIT_RUNNING) /* Write allocated dirty buffers in this inode before commit */ #define JI_WRITE_DATA (1 << __JI_WRITE_DATA) /* Wait for outstanding data writes for this inode before commit */ #define JI_WAIT_DATA (1 << __JI_WAIT_DATA) /** * struct jbd2_inode - The jbd_inode type is the structure linking inodes in * ordered mode present in a transaction so that we can sync them during commit. */ struct jbd2_inode { /** * @i_transaction: * * Which transaction does this inode belong to? Either the running * transaction or the committing one. [j_list_lock] */ transaction_t *i_transaction; /** * @i_next_transaction: * * Pointer to the running transaction modifying inode's data in case * there is already a committing transaction touching it. [j_list_lock] */ transaction_t *i_next_transaction; /** * @i_list: List of inodes in the i_transaction [j_list_lock] */ struct list_head i_list; /** * @i_vfs_inode: * * VFS inode this inode belongs to [constant for lifetime of structure] */ struct inode *i_vfs_inode; /** * @i_flags: Flags of inode [j_list_lock] */ unsigned long i_flags; /** * @i_dirty_start: * * Offset in bytes where the dirty range for this inode starts. * [j_list_lock] */ loff_t i_dirty_start; /** * @i_dirty_end: * * Inclusive offset in bytes where the dirty range for this inode * ends. [j_list_lock] */ loff_t i_dirty_end; }; struct jbd2_revoke_table_s; /** * struct jbd2_journal_handle - The jbd2_journal_handle type is the concrete * type associated with handle_t. * @h_transaction: Which compound transaction is this update a part of? * @h_journal: Which journal handle belongs to - used iff h_reserved set. * @h_rsv_handle: Handle reserved for finishing the logical operation. * @h_total_credits: Number of remaining buffers we are allowed to add to * journal. These are dirty buffers and revoke descriptor blocks. * @h_revoke_credits: Number of remaining revoke records available for handle * @h_ref: Reference count on this handle. * @h_err: Field for caller's use to track errors through large fs operations. * @h_sync: Flag for sync-on-close. * @h_jdata: Flag to force data journaling. * @h_reserved: Flag for handle for reserved credits. * @h_aborted: Flag indicating fatal error on handle. * @h_type: For handle statistics. * @h_line_no: For handle statistics. * @h_start_jiffies: Handle Start time. * @h_requested_credits: Holds @h_total_credits after handle is started. * @h_revoke_credits_requested: Holds @h_revoke_credits after handle is started. * @saved_alloc_context: Saved context while transaction is open. **/ /* Docbook can't yet cope with the bit fields, but will leave the documentation * in so it can be fixed later. */ struct jbd2_journal_handle { union { transaction_t *h_transaction; /* Which journal handle belongs to - used iff h_reserved set */ journal_t *h_journal; }; handle_t *h_rsv_handle; int h_total_credits; int h_revoke_credits; int h_revoke_credits_requested; int h_ref; int h_err; /* Flags [no locking] */ unsigned int h_sync: 1; unsigned int h_jdata: 1; unsigned int h_reserved: 1; unsigned int h_aborted: 1; unsigned int h_type: 8; unsigned int h_line_no: 16; unsigned long h_start_jiffies; unsigned int h_requested_credits; unsigned int saved_alloc_context; }; /* * Some stats for checkpoint phase */ struct transaction_chp_stats_s { unsigned long cs_chp_time; __u32 cs_forced_to_close; __u32 cs_written; __u32 cs_dropped; }; /* The transaction_t type is the guts of the journaling mechanism. It * tracks a compound transaction through its various states: * * RUNNING: accepting new updates * LOCKED: Updates still running but we don't accept new ones * RUNDOWN: Updates are tidying up but have finished requesting * new buffers to modify (state not used for now) * FLUSH: All updates complete, but we are still writing to disk * COMMIT: All data on disk, writing commit record * FINISHED: We still have to keep the transaction for checkpointing. * * The transaction keeps track of all of the buffers modified by a * running transaction, and all of the buffers committed but not yet * flushed to home for finished transactions. */ /* * Lock ranking: * * j_list_lock * ->jbd_lock_bh_journal_head() (This is "innermost") * * j_state_lock * ->b_state_lock * * b_state_lock * ->j_list_lock * * j_state_lock * ->t_handle_lock * * j_state_lock * ->j_list_lock (journal_unmap_buffer) * */ struct transaction_s { /* Pointer to the journal for this transaction. [no locking] */ journal_t *t_journal; /* Sequence number for this transaction [no locking] */ tid_t t_tid; /* * Transaction's current state * [no locking - only kjournald2 alters this] * [j_list_lock] guards transition of a transaction into T_FINISHED * state and subsequent call of __jbd2_journal_drop_transaction() * FIXME: needs barriers * KLUDGE: [use j_state_lock] */ enum { T_RUNNING, T_LOCKED, T_SWITCH, T_FLUSH, T_COMMIT, T_COMMIT_DFLUSH, T_COMMIT_JFLUSH, T_COMMIT_CALLBACK, T_FINISHED } t_state; /* * Where in the log does this transaction's commit start? [no locking] */ unsigned long t_log_start; /* Number of buffers on the t_buffers list [j_list_lock] */ int t_nr_buffers; /* * Doubly-linked circular list of all buffers reserved but not yet * modified by this transaction [j_list_lock] */ struct journal_head *t_reserved_list; /* * Doubly-linked circular list of all metadata buffers owned by this * transaction [j_list_lock] */ struct journal_head *t_buffers; /* * Doubly-linked circular list of all forget buffers (superseded * buffers which we can un-checkpoint once this transaction commits) * [j_list_lock] */ struct journal_head *t_forget; /* * Doubly-linked circular list of all buffers still to be flushed before * this transaction can be checkpointed. [j_list_lock] */ struct journal_head *t_checkpoint_list; /* * Doubly-linked circular list of all buffers submitted for IO while * checkpointing. [j_list_lock] */ struct journal_head *t_checkpoint_io_list; /* * Doubly-linked circular list of metadata buffers being shadowed by log * IO. The IO buffers on the iobuf list and the shadow buffers on this * list match each other one for one at all times. [j_list_lock] */ struct journal_head *t_shadow_list; /* * List of inodes associated with the transaction; e.g., ext4 uses * this to track inodes in data=ordered and data=journal mode that * need special handling on transaction commit; also used by ocfs2. * [j_list_lock] */ struct list_head t_inode_list; /* * Protects info related to handles */ spinlock_t t_handle_lock; /* * Longest time some handle had to wait for running transaction */ unsigned long t_max_wait; /* * When transaction started */ unsigned long t_start; /* * When commit was requested */ unsigned long t_requested; /* * Checkpointing stats [j_checkpoint_sem] */ struct transaction_chp_stats_s t_chp_stats; /* * Number of outstanding updates running on this transaction * [none] */ atomic_t t_updates; /* * Number of blocks reserved for this transaction in the journal. * This is including all credits reserved when starting transaction * handles as well as all journal descriptor blocks needed for this * transaction. [none] */ atomic_t t_outstanding_credits; /* * Number of revoke records for this transaction added by already * stopped handles. [none] */ atomic_t t_outstanding_revokes; /* * How many handles used this transaction? [none] */ atomic_t t_handle_count; /* * Forward and backward links for the circular list of all transactions * awaiting checkpoint. [j_list_lock] */ transaction_t *t_cpnext, *t_cpprev; /* * When will the transaction expire (become due for commit), in jiffies? * [no locking] */ unsigned long t_expires; /* * When this transaction started, in nanoseconds [no locking] */ ktime_t t_start_time; /* * This transaction is being forced and some process is * waiting for it to finish. */ unsigned int t_synchronous_commit:1; /* Disk flush needs to be sent to fs partition [no locking] */ int t_need_data_flush; /* * For use by the filesystem to store fs-specific data * structures associated with the transaction */ struct list_head t_private_list; }; struct transaction_run_stats_s { unsigned long rs_wait; unsigned long rs_request_delay; unsigned long rs_running; unsigned long rs_locked; unsigned long rs_flushing; unsigned long rs_logging; __u32 rs_handle_count; __u32 rs_blocks; __u32 rs_blocks_logged; }; struct transaction_stats_s { unsigned long ts_tid; unsigned long ts_requested; struct transaction_run_stats_s run; }; static inline unsigned long jbd2_time_diff(unsigned long start, unsigned long end) { if (end >= start) return end - start; return end + (MAX_JIFFY_OFFSET - start); } #define JBD2_NR_BATCH 64 enum passtype {PASS_SCAN, PASS_REVOKE, PASS_REPLAY}; #define JBD2_FC_REPLAY_STOP 0 #define JBD2_FC_REPLAY_CONTINUE 1 /** * struct journal_s - The journal_s type is the concrete type associated with * journal_t. */ struct journal_s { /** * @j_flags: General journaling state flags [j_state_lock] */ unsigned long j_flags; /** * @j_errno: * * Is there an outstanding uncleared error on the journal (from a prior * abort)? [j_state_lock] */ int j_errno; /** * @j_abort_mutex: Lock the whole aborting procedure. */ struct mutex j_abort_mutex; /** * @j_sb_buffer: The first part of the superblock buffer. */ struct buffer_head *j_sb_buffer; /** * @j_superblock: The second part of the superblock buffer. */ journal_superblock_t *j_superblock; /** * @j_format_version: Version of the superblock format. */ int j_format_version; /** * @j_state_lock: Protect the various scalars in the journal. */ rwlock_t j_state_lock; /** * @j_barrier_count: * * Number of processes waiting to create a barrier lock [j_state_lock] */ int j_barrier_count; /** * @j_barrier: The barrier lock itself. */ struct mutex j_barrier; /** * @j_running_transaction: * * Transactions: The current running transaction... * [j_state_lock] [caller holding open handle] */ transaction_t *j_running_transaction; /** * @j_committing_transaction: * * the transaction we are pushing to disk * [j_state_lock] [caller holding open handle] */ transaction_t *j_committing_transaction; /** * @j_checkpoint_transactions: * * ... and a linked circular list of all transactions waiting for * checkpointing. [j_list_lock] */ transaction_t *j_checkpoint_transactions; /** * @j_wait_transaction_locked: * * Wait queue for waiting for a locked transaction to start committing, * or for a barrier lock to be released. */ wait_queue_head_t j_wait_transaction_locked; /** * @j_wait_done_commit: Wait queue for waiting for commit to complete. */ wait_queue_head_t j_wait_done_commit; /** * @j_wait_commit: Wait queue to trigger commit. */ wait_queue_head_t j_wait_commit; /** * @j_wait_updates: Wait queue to wait for updates to complete. */ wait_queue_head_t j_wait_updates; /** * @j_wait_reserved: * * Wait queue to wait for reserved buffer credits to drop. */ wait_queue_head_t j_wait_reserved; /** * @j_fc_wait: * * Wait queue to wait for completion of async fast commits. */ wait_queue_head_t j_fc_wait; /** * @j_checkpoint_mutex: * * Semaphore for locking against concurrent checkpoints. */ struct mutex j_checkpoint_mutex; /** * @j_chkpt_bhs: * * List of buffer heads used by the checkpoint routine. This * was moved from jbd2_log_do_checkpoint() to reduce stack * usage. Access to this array is controlled by the * @j_checkpoint_mutex. [j_checkpoint_mutex] */ struct buffer_head *j_chkpt_bhs[JBD2_NR_BATCH]; /** * @j_head: * * Journal head: identifies the first unused block in the journal. * [j_state_lock] */ unsigned long j_head; /** * @j_tail: * * Journal tail: identifies the oldest still-used block in the journal. * [j_state_lock] */ unsigned long j_tail; /** * @j_free: * * Journal free: how many free blocks are there in the journal? * [j_state_lock] */ unsigned long j_free; /** * @j_first: * * The block number of the first usable block in the journal * [j_state_lock]. */ unsigned long j_first; /** * @j_last: * * The block number one beyond the last usable block in the journal * [j_state_lock]. */ unsigned long j_last; /** * @j_fc_first: * * The block number of the first fast commit block in the journal * [j_state_lock]. */ unsigned long j_fc_first; /** * @j_fc_off: * * Number of fast commit blocks currently allocated. Accessed only * during fast commit. Currently only process can do fast commit, so * this field is not protected by any lock. */ unsigned long j_fc_off; /** * @j_fc_last: * * The block number one beyond the last fast commit block in the journal * [j_state_lock]. */ unsigned long j_fc_last; /** * @j_dev: Device where we store the journal. */ struct block_device *j_dev; /** * @j_blocksize: Block size for the location where we store the journal. */ int j_blocksize; /** * @j_blk_offset: * * Starting block offset into the device where we store the journal. */ unsigned long long j_blk_offset; /** * @j_devname: Journal device name. */ char j_devname[BDEVNAME_SIZE+24]; /** * @j_fs_dev: * * Device which holds the client fs. For internal journal this will be * equal to j_dev. */ struct block_device *j_fs_dev; /** * @j_total_len: Total maximum capacity of the journal region on disk. */ unsigned int j_total_len; /** * @j_reserved_credits: * * Number of buffers reserved from the running transaction. */ atomic_t j_reserved_credits; /** * @j_list_lock: Protects the buffer lists and internal buffer state. */ spinlock_t j_list_lock; /** * @j_inode: * * Optional inode where we store the journal. If present, all * journal block numbers are mapped into this inode via bmap(). */ struct inode *j_inode; /** * @j_tail_sequence: * * Sequence number of the oldest transaction in the log [j_state_lock] */ tid_t j_tail_sequence; /** * @j_transaction_sequence: * * Sequence number of the next transaction to grant [j_state_lock] */ tid_t j_transaction_sequence; /** * @j_commit_sequence: * * Sequence number of the most recently committed transaction * [j_state_lock]. */ tid_t j_commit_sequence; /** * @j_commit_request: * * Sequence number of the most recent transaction wanting commit * [j_state_lock] */ tid_t j_commit_request; /** * @j_uuid: * * Journal uuid: identifies the object (filesystem, LVM volume etc) * backed by this journal. This will eventually be replaced by an array * of uuids, allowing us to index multiple devices within a single * journal and to perform atomic updates across them. */ __u8 j_uuid[16]; /** * @j_task: Pointer to the current commit thread for this journal. */ struct task_struct *j_task; /** * @j_max_transaction_buffers: * * Maximum number of metadata buffers to allow in a single compound * commit transaction. */ int j_max_transaction_buffers; /** * @j_revoke_records_per_block: * * Number of revoke records that fit in one descriptor block. */ int j_revoke_records_per_block; /** * @j_commit_interval: * * What is the maximum transaction lifetime before we begin a commit? */ unsigned long j_commit_interval; /** * @j_commit_timer: The timer used to wakeup the commit thread. */ struct timer_list j_commit_timer; /** * @j_revoke_lock: Protect the revoke table. */ spinlock_t j_revoke_lock; /** * @j_revoke: * * The revoke table - maintains the list of revoked blocks in the * current transaction. */ struct jbd2_revoke_table_s *j_revoke; /** * @j_revoke_table: Alternate revoke tables for j_revoke. */ struct jbd2_revoke_table_s *j_revoke_table[2]; /** * @j_wbuf: Array of bhs for jbd2_journal_commit_transaction. */ struct buffer_head **j_wbuf; /** * @j_fc_wbuf: Array of fast commit bhs for fast commit. Accessed only * during a fast commit. Currently only process can do fast commit, so * this field is not protected by any lock. */ struct buffer_head **j_fc_wbuf; /** * @j_wbufsize: * * Size of @j_wbuf array. */ int j_wbufsize; /** * @j_fc_wbufsize: * * Size of @j_fc_wbuf array. */ int j_fc_wbufsize; /** * @j_last_sync_writer: * * The pid of the last person to run a synchronous operation * through the journal. */ pid_t j_last_sync_writer; /** * @j_average_commit_time: * * The average amount of time in nanoseconds it takes to commit a * transaction to disk. [j_state_lock] */ u64 j_average_commit_time; /** * @j_min_batch_time: * * Minimum time that we should wait for additional filesystem operations * to get batched into a synchronous handle in microseconds. */ u32 j_min_batch_time; /** * @j_max_batch_time: * * Maximum time that we should wait for additional filesystem operations * to get batched into a synchronous handle in microseconds. */ u32 j_max_batch_time; /** * @j_commit_callback: * * This function is called when a transaction is closed. */ void (*j_commit_callback)(journal_t *, transaction_t *); /** * @j_submit_inode_data_buffers: * * This function is called for all inodes associated with the * committing transaction marked with JI_WRITE_DATA flag * before we start to write out the transaction to the journal. */ int (*j_submit_inode_data_buffers) (struct jbd2_inode *); /** * @j_finish_inode_data_buffers: * * This function is called for all inodes associated with the * committing transaction marked with JI_WAIT_DATA flag * after we have written the transaction to the journal * but before we write out the commit block. */ int (*j_finish_inode_data_buffers) (struct jbd2_inode *); /* * Journal statistics */ /** * @j_history_lock: Protect the transactions statistics history. */ spinlock_t j_history_lock; /** * @j_proc_entry: procfs entry for the jbd statistics directory. */ struct proc_dir_entry *j_proc_entry; /** * @j_stats: Overall statistics. */ struct transaction_stats_s j_stats; /** * @j_failed_commit: Failed journal commit ID. */ unsigned int j_failed_commit; /** * @j_private: * * An opaque pointer to fs-private information. ext3 puts its * superblock pointer here. */ void *j_private; /** * @j_chksum_driver: * * Reference to checksum algorithm driver via cryptoapi. */ struct crypto_shash *j_chksum_driver; /** * @j_csum_seed: * * Precomputed journal UUID checksum for seeding other checksums. */ __u32 j_csum_seed; #ifdef CONFIG_DEBUG_LOCK_ALLOC /** * @j_trans_commit_map: * * Lockdep entity to track transaction commit dependencies. Handles * hold this "lock" for read, when we wait for commit, we acquire the * "lock" for writing. This matches the properties of jbd2 journalling * where the running transaction has to wait for all handles to be * dropped to commit that transaction and also acquiring a handle may * require transaction commit to finish. */ struct lockdep_map j_trans_commit_map; #endif /** * @j_fc_cleanup_callback: * * Clean-up after fast commit or full commit. JBD2 calls this function * after every commit operation. */ void (*j_fc_cleanup_callback)(struct journal_s *journal, int); /** * @j_fc_replay_callback: * * File-system specific function that performs replay of a fast * commit. JBD2 calls this function for each fast commit block found in * the journal. This function should return JBD2_FC_REPLAY_CONTINUE * to indicate that the block was processed correctly and more fast * commit replay should continue. Return value of JBD2_FC_REPLAY_STOP * indicates the end of replay (no more blocks remaining). A negative * return value indicates error. */ int (*j_fc_replay_callback)(struct journal_s *journal, struct buffer_head *bh, enum passtype pass, int off, tid_t expected_commit_id); }; #define jbd2_might_wait_for_commit(j) \ do { \ rwsem_acquire(&j->j_trans_commit_map, 0, 0, _THIS_IP_); \ rwsem_release(&j->j_trans_commit_map, _THIS_IP_); \ } while (0) /* journal feature predicate functions */ #define JBD2_FEATURE_COMPAT_FUNCS(name, flagname) \ static inline bool jbd2_has_feature_##name(journal_t *j) \ { \ return ((j)->j_format_version >= 2 && \ ((j)->j_superblock->s_feature_compat & \ cpu_to_be32(JBD2_FEATURE_COMPAT_##flagname)) != 0); \ } \ static inline void jbd2_set_feature_##name(journal_t *j) \ { \ (j)->j_superblock->s_feature_compat |= \ cpu_to_be32(JBD2_FEATURE_COMPAT_##flagname); \ } \ static inline void jbd2_clear_feature_##name(journal_t *j) \ { \ (j)->j_superblock->s_feature_compat &= \ ~cpu_to_be32(JBD2_FEATURE_COMPAT_##flagname); \ } #define JBD2_FEATURE_RO_COMPAT_FUNCS(name, flagname) \ static inline bool jbd2_has_feature_##name(journal_t *j) \ { \ return ((j)->j_format_version >= 2 && \ ((j)->j_superblock->s_feature_ro_compat & \ cpu_to_be32(JBD2_FEATURE_RO_COMPAT_##flagname)) != 0); \ } \ static inline void jbd2_set_feature_##name(journal_t *j) \ { \ (j)->j_superblock->s_feature_ro_compat |= \ cpu_to_be32(JBD2_FEATURE_RO_COMPAT_##flagname); \ } \ static inline void jbd2_clear_feature_##name(journal_t *j) \ { \ (j)->j_superblock->s_feature_ro_compat &= \ ~cpu_to_be32(JBD2_FEATURE_RO_COMPAT_##flagname); \ } #define JBD2_FEATURE_INCOMPAT_FUNCS(name, flagname) \ static inline bool jbd2_has_feature_##name(journal_t *j) \ { \ return ((j)->j_format_version >= 2 && \ ((j)->j_superblock->s_feature_incompat & \ cpu_to_be32(JBD2_FEATURE_INCOMPAT_##flagname)) != 0); \ } \ static inline void jbd2_set_feature_##name(journal_t *j) \ { \ (j)->j_superblock->s_feature_incompat |= \ cpu_to_be32(JBD2_FEATURE_INCOMPAT_##flagname); \ } \ static inline void jbd2_clear_feature_##name(journal_t *j) \ { \ (j)->j_superblock->s_feature_incompat &= \ ~cpu_to_be32(JBD2_FEATURE_INCOMPAT_##flagname); \ } JBD2_FEATURE_COMPAT_FUNCS(checksum, CHECKSUM) JBD2_FEATURE_INCOMPAT_FUNCS(revoke, REVOKE) JBD2_FEATURE_INCOMPAT_FUNCS(64bit, 64BIT) JBD2_FEATURE_INCOMPAT_FUNCS(async_commit, ASYNC_COMMIT) JBD2_FEATURE_INCOMPAT_FUNCS(csum2, CSUM_V2) JBD2_FEATURE_INCOMPAT_FUNCS(csum3, CSUM_V3) JBD2_FEATURE_INCOMPAT_FUNCS(fast_commit, FAST_COMMIT) /* * Journal flag definitions */ #define JBD2_UNMOUNT 0x001 /* Journal thread is being destroyed */ #define JBD2_ABORT 0x002 /* Journaling has been aborted for errors. */ #define JBD2_ACK_ERR 0x004 /* The errno in the sb has been acked */ #define JBD2_FLUSHED 0x008 /* The journal superblock has been flushed */ #define JBD2_LOADED 0x010 /* The journal superblock has been loaded */ #define JBD2_BARRIER 0x020 /* Use IDE barriers */ #define JBD2_ABORT_ON_SYNCDATA_ERR 0x040 /* Abort the journal on file * data write error in ordered * mode */ #define JBD2_FAST_COMMIT_ONGOING 0x100 /* Fast commit is ongoing */ #define JBD2_FULL_COMMIT_ONGOING 0x200 /* Full commit is ongoing */ /* * Function declarations for the journaling transaction and buffer * management */ /* Filing buffers */ extern void jbd2_journal_unfile_buffer(journal_t *, struct journal_head *); extern bool __jbd2_journal_refile_buffer(struct journal_head *); extern void jbd2_journal_refile_buffer(journal_t *, struct journal_head *); extern void __jbd2_journal_file_buffer(struct journal_head *, transaction_t *, int); extern void __journal_free_buffer(struct journal_head *bh); extern void jbd2_journal_file_buffer(struct journal_head *, transaction_t *, int); extern void __journal_clean_data_list(transaction_t *transaction); static inline void jbd2_file_log_bh(struct list_head *head, struct buffer_head *bh) { list_add_tail(&bh->b_assoc_buffers, head); } static inline void jbd2_unfile_log_bh(struct buffer_head *bh) { list_del_init(&bh->b_assoc_buffers); } /* Log buffer allocation */ struct buffer_head *jbd2_journal_get_descriptor_buffer(transaction_t *, int); void jbd2_descriptor_block_csum_set(journal_t *, struct buffer_head *); int jbd2_journal_next_log_block(journal_t *, unsigned long long *); int jbd2_journal_get_log_tail(journal_t *journal, tid_t *tid, unsigned long *block); int __jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block); void jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block); /* Commit management */ extern void jbd2_journal_commit_transaction(journal_t *); /* Checkpoint list management */ void __jbd2_journal_clean_checkpoint_list(journal_t *journal, bool destroy); int __jbd2_journal_remove_checkpoint(struct journal_head *); void jbd2_journal_destroy_checkpoint(journal_t *journal); void __jbd2_journal_insert_checkpoint(struct journal_head *, transaction_t *); /* * Triggers */ struct jbd2_buffer_trigger_type { /* * Fired a the moment data to write to the journal are known to be * stable - so either at the moment b_frozen_data is created or just * before a buffer is written to the journal. mapped_data is a mapped * buffer that is the frozen data for commit. */ void (*t_frozen)(struct jbd2_buffer_trigger_type *type, struct buffer_head *bh, void *mapped_data, size_t size); /* * Fired during journal abort for dirty buffers that will not be * committed. */ void (*t_abort)(struct jbd2_buffer_trigger_type *type, struct buffer_head *bh); }; extern void jbd2_buffer_frozen_trigger(struct journal_head *jh, void *mapped_data, struct jbd2_buffer_trigger_type *triggers); extern void jbd2_buffer_abort_trigger(struct journal_head *jh, struct jbd2_buffer_trigger_type *triggers); /* Buffer IO */ extern int jbd2_journal_write_metadata_buffer(transaction_t *transaction, struct journal_head *jh_in, struct buffer_head **bh_out, sector_t blocknr); /* Transaction locking */ extern void __wait_on_journal (journal_t *); /* Transaction cache support */ extern void jbd2_journal_destroy_transaction_cache(void); extern int __init jbd2_journal_init_transaction_cache(void); extern void jbd2_journal_free_transaction(transaction_t *); /* * Journal locking. * * We need to lock the journal during transaction state changes so that nobody * ever tries to take a handle on the running transaction while we are in the * middle of moving it to the commit phase. j_state_lock does this. * * Note that the locking is completely interrupt unsafe. We never touch * journal structures from interrupts. */ static inline handle_t *journal_current_handle(void) { return current->journal_info; } /* The journaling code user interface: * * Create and destroy handles * Register buffer modifications against the current transaction. */ extern handle_t *jbd2_journal_start(journal_t *, int nblocks); extern handle_t *jbd2__journal_start(journal_t *, int blocks, int rsv_blocks, int revoke_records, gfp_t gfp_mask, unsigned int type, unsigned int line_no); extern int jbd2_journal_restart(handle_t *, int nblocks); extern int jbd2__journal_restart(handle_t *, int nblocks, int revoke_records, gfp_t gfp_mask); extern int jbd2_journal_start_reserved(handle_t *handle, unsigned int type, unsigned int line_no); extern void jbd2_journal_free_reserved(handle_t *handle); extern int jbd2_journal_extend(handle_t *handle, int nblocks, int revoke_records); extern int jbd2_journal_get_write_access(handle_t *, struct buffer_head *); extern int jbd2_journal_get_create_access (handle_t *, struct buffer_head *); extern int jbd2_journal_get_undo_access(handle_t *, struct buffer_head *); void jbd2_journal_set_triggers(struct buffer_head *, struct jbd2_buffer_trigger_type *type); extern int jbd2_journal_dirty_metadata (handle_t *, struct buffer_head *); extern int jbd2_journal_forget (handle_t *, struct buffer_head *); extern int jbd2_journal_invalidatepage(journal_t *, struct page *, unsigned int, unsigned int); extern int jbd2_journal_try_to_free_buffers(journal_t *journal, struct page *page); extern int jbd2_journal_stop(handle_t *); extern int jbd2_journal_flush (journal_t *); extern void jbd2_journal_lock_updates (journal_t *); extern void jbd2_journal_unlock_updates (journal_t *); extern journal_t * jbd2_journal_init_dev(struct block_device *bdev, struct block_device *fs_dev, unsigned long long start, int len, int bsize); extern journal_t * jbd2_journal_init_inode (struct inode *); extern int jbd2_journal_update_format (journal_t *); extern int jbd2_journal_check_used_features (journal_t *, unsigned long, unsigned long, unsigned long); extern int jbd2_journal_check_available_features (journal_t *, unsigned long, unsigned long, unsigned long); extern int jbd2_journal_set_features (journal_t *, unsigned long, unsigned long, unsigned long); extern void jbd2_journal_clear_features (journal_t *, unsigned long, unsigned long, unsigned long); extern int jbd2_journal_load (journal_t *journal); extern int jbd2_journal_destroy (journal_t *); extern int jbd2_journal_recover (journal_t *journal); extern int jbd2_journal_wipe (journal_t *, int); extern int jbd2_journal_skip_recovery (journal_t *); extern void jbd2_journal_update_sb_errno(journal_t *); extern int jbd2_journal_update_sb_log_tail (journal_t *, tid_t, unsigned long, int); extern void jbd2_journal_abort (journal_t *, int); extern int jbd2_journal_errno (journal_t *); extern void jbd2_journal_ack_err (journal_t *); extern int jbd2_journal_clear_err (journal_t *); extern int jbd2_journal_bmap(journal_t *, unsigned long, unsigned long long *); extern int jbd2_journal_force_commit(journal_t *); extern int jbd2_journal_force_commit_nested(journal_t *); extern int jbd2_journal_inode_ranged_write(handle_t *handle, struct jbd2_inode *inode, loff_t start_byte, loff_t length); extern int jbd2_journal_inode_ranged_wait(handle_t *handle, struct jbd2_inode *inode, loff_t start_byte, loff_t length); extern int jbd2_journal_submit_inode_data_buffers( struct jbd2_inode *jinode); extern int jbd2_journal_finish_inode_data_buffers( struct jbd2_inode *jinode); extern int jbd2_journal_begin_ordered_truncate(journal_t *journal, struct jbd2_inode *inode, loff_t new_size); extern void jbd2_journal_init_jbd_inode(struct jbd2_inode *jinode, struct inode *inode); extern void jbd2_journal_release_jbd_inode(journal_t *journal, struct jbd2_inode *jinode); /* * journal_head management */ struct journal_head *jbd2_journal_add_journal_head(struct buffer_head *bh); struct journal_head *jbd2_journal_grab_journal_head(struct buffer_head *bh); void jbd2_journal_put_journal_head(struct journal_head *jh); /* * handle management */ extern struct kmem_cache *jbd2_handle_cache; static inline handle_t *jbd2_alloc_handle(gfp_t gfp_flags) { return kmem_cache_zalloc(jbd2_handle_cache, gfp_flags); } static inline void jbd2_free_handle(handle_t *handle) { kmem_cache_free(jbd2_handle_cache, handle); } /* * jbd2_inode management (optional, for those file systems that want to use * dynamically allocated jbd2_inode structures) */ extern struct kmem_cache *jbd2_inode_cache; static inline struct jbd2_inode *jbd2_alloc_inode(gfp_t gfp_flags) { return kmem_cache_alloc(jbd2_inode_cache, gfp_flags); } static inline void jbd2_free_inode(struct jbd2_inode *jinode) { kmem_cache_free(jbd2_inode_cache, jinode); } /* Primary revoke support */ #define JOURNAL_REVOKE_DEFAULT_HASH 256 extern int jbd2_journal_init_revoke(journal_t *, int); extern void jbd2_journal_destroy_revoke_record_cache(void); extern void jbd2_journal_destroy_revoke_table_cache(void); extern int __init jbd2_journal_init_revoke_record_cache(void); extern int __init jbd2_journal_init_revoke_table_cache(void); extern void jbd2_journal_destroy_revoke(journal_t *); extern int jbd2_journal_revoke (handle_t *, unsigned long long, struct buffer_head *); extern int jbd2_journal_cancel_revoke(handle_t *, struct journal_head *); extern void jbd2_journal_write_revoke_records(transaction_t *transaction, struct list_head *log_bufs); /* Recovery revoke support */ extern int jbd2_journal_set_revoke(journal_t *, unsigned long long, tid_t); extern int jbd2_journal_test_revoke(journal_t *, unsigned long long, tid_t); extern void jbd2_journal_clear_revoke(journal_t *); extern void jbd2_journal_switch_revoke_table(journal_t *journal); extern void jbd2_clear_buffer_revoked_flags(journal_t *journal); /* * The log thread user interface: * * Request space in the current transaction, and force transaction commit * transitions on demand. */ int jbd2_log_start_commit(journal_t *journal, tid_t tid); int __jbd2_log_start_commit(journal_t *journal, tid_t tid); int jbd2_journal_start_commit(journal_t *journal, tid_t *tid); int jbd2_log_wait_commit(journal_t *journal, tid_t tid); int jbd2_transaction_committed(journal_t *journal, tid_t tid); int jbd2_complete_transaction(journal_t *journal, tid_t tid); int jbd2_log_do_checkpoint(journal_t *journal); int jbd2_trans_will_send_data_barrier(journal_t *journal, tid_t tid); void __jbd2_log_wait_for_space(journal_t *journal); extern void __jbd2_journal_drop_transaction(journal_t *, transaction_t *); extern int jbd2_cleanup_journal_tail(journal_t *); /* Fast commit related APIs */ int jbd2_fc_begin_commit(journal_t *journal, tid_t tid); int jbd2_fc_end_commit(journal_t *journal); int jbd2_fc_end_commit_fallback(journal_t *journal); int jbd2_fc_get_buf(journal_t *journal, struct buffer_head **bh_out); int jbd2_submit_inode_data(struct jbd2_inode *jinode); int jbd2_wait_inode_data(journal_t *journal, struct jbd2_inode *jinode); int jbd2_fc_wait_bufs(journal_t *journal, int num_blks); int jbd2_fc_release_bufs(journal_t *journal); static inline int jbd2_journal_get_max_txn_bufs(journal_t *journal) { return (journal->j_total_len - journal->j_fc_wbufsize) / 4; } /* * is_journal_abort * * Simple test wrapper function to test the JBD2_ABORT state flag. This * bit, when set, indicates that we have had a fatal error somewhere, * either inside the journaling layer or indicated to us by the client * (eg. ext3), and that we and should not commit any further * transactions. */ static inline int is_journal_aborted(journal_t *journal) { return journal->j_flags & JBD2_ABORT; } static inline int is_handle_aborted(handle_t *handle) { if (handle->h_aborted || !handle->h_transaction) return 1; return is_journal_aborted(handle->h_transaction->t_journal); } static inline void jbd2_journal_abort_handle(handle_t *handle) { handle->h_aborted = 1; } #endif /* __KERNEL__ */ /* Comparison functions for transaction IDs: perform comparisons using * modulo arithmetic so that they work over sequence number wraps. */ static inline int tid_gt(tid_t x, tid_t y) { int difference = (x - y); return (difference > 0); } static inline int tid_geq(tid_t x, tid_t y) { int difference = (x - y); return (difference >= 0); } extern int jbd2_journal_blocks_per_page(struct inode *inode); extern size_t journal_tag_bytes(journal_t *journal); static inline bool jbd2_journal_has_csum_v2or3_feature(journal_t *j) { return jbd2_has_feature_csum2(j) || jbd2_has_feature_csum3(j); } static inline int jbd2_journal_has_csum_v2or3(journal_t *journal) { WARN_ON_ONCE(jbd2_journal_has_csum_v2or3_feature(journal) && journal->j_chksum_driver == NULL); return journal->j_chksum_driver != NULL; } /* * Return number of free blocks in the log. Must be called under j_state_lock. */ static inline unsigned long jbd2_log_space_left(journal_t *journal) { /* Allow for rounding errors */ long free = journal->j_free - 32; if (journal->j_committing_transaction) { free -= atomic_read(&journal-> j_committing_transaction->t_outstanding_credits); } return max_t(long, free, 0); } /* * Definitions which augment the buffer_head layer */ /* journaling buffer types */ #define BJ_None 0 /* Not journaled */ #define BJ_Metadata 1 /* Normal journaled metadata */ #define BJ_Forget 2 /* Buffer superseded by this transaction */ #define BJ_Shadow 3 /* Buffer contents being shadowed to the log */ #define BJ_Reserved 4 /* Buffer is reserved for access by journal */ #define BJ_Types 5 extern int jbd_blocks_per_page(struct inode *inode); /* JBD uses a CRC32 checksum */ #define JBD_MAX_CHECKSUM_SIZE 4 static inline u32 jbd2_chksum(journal_t *journal, u32 crc, const void *address, unsigned int length) { struct { struct shash_desc shash; char ctx[JBD_MAX_CHECKSUM_SIZE]; } desc; int err; BUG_ON(crypto_shash_descsize(journal->j_chksum_driver) > JBD_MAX_CHECKSUM_SIZE); desc.shash.tfm = journal->j_chksum_driver; *(u32 *)desc.ctx = crc; err = crypto_shash_update(&desc.shash, address, length); BUG_ON(err); return *(u32 *)desc.ctx; } /* Return most recent uncommitted transaction */ static inline tid_t jbd2_get_latest_transaction(journal_t *journal) { tid_t tid; read_lock(&journal->j_state_lock); tid = journal->j_commit_request; if (journal->j_running_transaction) tid = journal->j_running_transaction->t_tid; read_unlock(&journal->j_state_lock); return tid; } static inline int jbd2_handle_buffer_credits(handle_t *handle) { journal_t *journal; if (!handle->h_reserved) journal = handle->h_transaction->t_journal; else journal = handle->h_journal; return handle->h_total_credits - DIV_ROUND_UP(handle->h_revoke_credits_requested, journal->j_revoke_records_per_block); } #ifdef __KERNEL__ #define buffer_trace_init(bh) do {} while (0) #define print_buffer_fields(bh) do {} while (0) #define print_buffer_trace(bh) do {} while (0) #define BUFFER_TRACE(bh, info) do {} while (0) #define BUFFER_TRACE2(bh, bh2, info) do {} while (0) #define JBUFFER_TRACE(jh, info) do {} while (0) #endif /* __KERNEL__ */ #define EFSBADCRC EBADMSG /* Bad CRC detected */ #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ #endif /* _LINUX_JBD2_H */
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 /* SPDX-License-Identifier: GPL-2.0 */ /* * generic net pointers */ #ifndef __NET_GENERIC_H__ #define __NET_GENERIC_H__ #include <linux/bug.h> #include <linux/rcupdate.h> /* * Generic net pointers are to be used by modules to put some private * stuff on the struct net without explicit struct net modification * * The rules are simple: * 1. set pernet_operations->id. After register_pernet_device you * will have the id of your private pointer. * 2. set pernet_operations->size to have the code allocate and free * a private structure pointed to from struct net. * 3. do not change this pointer while the net is alive; * 4. do not try to have any private reference on the net_generic object. * * After accomplishing all of the above, the private pointer can be * accessed with the net_generic() call. */ struct net_generic { union { struct { unsigned int len; struct rcu_head rcu; } s; void *ptr[0]; }; }; static inline void *net_generic(const struct net *net, unsigned int id) { struct net_generic *ng; void *ptr; rcu_read_lock(); ng = rcu_dereference(net->gen); ptr = ng->ptr[id]; rcu_read_unlock(); return ptr; } #endif
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * 25-Jul-1998 Major changes to allow for ip chain table * * 3-Jan-2000 Named tables to allow packet selection for different uses. */ /* * Format of an IP6 firewall descriptor * * src, dst, src_mask, dst_mask are always stored in network byte order. * flags are stored in host byte order (of course). * Port numbers are stored in HOST byte order. */ #ifndef _UAPI_IP6_TABLES_H #define _UAPI_IP6_TABLES_H #include <linux/types.h> #include <linux/compiler.h> #include <linux/if.h> #include <linux/netfilter_ipv6.h> #include <linux/netfilter/x_tables.h> #ifndef __KERNEL__ #define IP6T_FUNCTION_MAXNAMELEN XT_FUNCTION_MAXNAMELEN #define IP6T_TABLE_MAXNAMELEN XT_TABLE_MAXNAMELEN #define ip6t_match xt_match #define ip6t_target xt_target #define ip6t_table xt_table #define ip6t_get_revision xt_get_revision #define ip6t_entry_match xt_entry_match #define ip6t_entry_target xt_entry_target #define ip6t_standard_target xt_standard_target #define ip6t_error_target xt_error_target #define ip6t_counters xt_counters #define IP6T_CONTINUE XT_CONTINUE #define IP6T_RETURN XT_RETURN /* Pre-iptables-1.4.0 */ #include <linux/netfilter/xt_tcpudp.h> #define ip6t_tcp xt_tcp #define ip6t_udp xt_udp #define IP6T_TCP_INV_SRCPT XT_TCP_INV_SRCPT #define IP6T_TCP_INV_DSTPT XT_TCP_INV_DSTPT #define IP6T_TCP_INV_FLAGS XT_TCP_INV_FLAGS #define IP6T_TCP_INV_OPTION XT_TCP_INV_OPTION #define IP6T_TCP_INV_MASK XT_TCP_INV_MASK #define IP6T_UDP_INV_SRCPT XT_UDP_INV_SRCPT #define IP6T_UDP_INV_DSTPT XT_UDP_INV_DSTPT #define IP6T_UDP_INV_MASK XT_UDP_INV_MASK #define ip6t_counters_info xt_counters_info #define IP6T_STANDARD_TARGET XT_STANDARD_TARGET #define IP6T_ERROR_TARGET XT_ERROR_TARGET #define IP6T_MATCH_ITERATE(e, fn, args...) \ XT_MATCH_ITERATE(struct ip6t_entry, e, fn, ## args) #define IP6T_ENTRY_ITERATE(entries, size, fn, args...) \ XT_ENTRY_ITERATE(struct ip6t_entry, entries, size, fn, ## args) #endif /* Yes, Virginia, you have to zero the padding. */ struct ip6t_ip6 { /* Source and destination IP6 addr */ struct in6_addr src, dst; /* Mask for src and dest IP6 addr */ struct in6_addr smsk, dmsk; char iniface[IFNAMSIZ], outiface[IFNAMSIZ]; unsigned char iniface_mask[IFNAMSIZ], outiface_mask[IFNAMSIZ]; /* Upper protocol number * - The allowed value is 0 (any) or protocol number of last parsable * header, which is 50 (ESP), 59 (No Next Header), 135 (MH), or * the non IPv6 extension headers. * - The protocol numbers of IPv6 extension headers except of ESP and * MH do not match any packets. * - You also need to set IP6T_FLAGS_PROTO to "flags" to check protocol. */ __u16 proto; /* TOS to match iff flags & IP6T_F_TOS */ __u8 tos; /* Flags word */ __u8 flags; /* Inverse flags */ __u8 invflags; }; /* Values for "flag" field in struct ip6t_ip6 (general ip6 structure). */ #define IP6T_F_PROTO 0x01 /* Set if rule cares about upper protocols */ #define IP6T_F_TOS 0x02 /* Match the TOS. */ #define IP6T_F_GOTO 0x04 /* Set if jump is a goto */ #define IP6T_F_MASK 0x07 /* All possible flag bits mask. */ /* Values for "inv" field in struct ip6t_ip6. */ #define IP6T_INV_VIA_IN 0x01 /* Invert the sense of IN IFACE. */ #define IP6T_INV_VIA_OUT 0x02 /* Invert the sense of OUT IFACE */ #define IP6T_INV_TOS 0x04 /* Invert the sense of TOS. */ #define IP6T_INV_SRCIP 0x08 /* Invert the sense of SRC IP. */ #define IP6T_INV_DSTIP 0x10 /* Invert the sense of DST OP. */ #define IP6T_INV_FRAG 0x20 /* Invert the sense of FRAG. */ #define IP6T_INV_PROTO XT_INV_PROTO #define IP6T_INV_MASK 0x7F /* All possible flag bits mask. */ /* This structure defines each of the firewall rules. Consists of 3 parts which are 1) general IP header stuff 2) match specific stuff 3) the target to perform if the rule matches */ struct ip6t_entry { struct ip6t_ip6 ipv6; /* Mark with fields that we care about. */ unsigned int nfcache; /* Size of ipt_entry + matches */ __u16 target_offset; /* Size of ipt_entry + matches + target */ __u16 next_offset; /* Back pointer */ unsigned int comefrom; /* Packet and byte counters. */ struct xt_counters counters; /* The matches (if any), then the target. */ unsigned char elems[0]; }; /* Standard entry */ struct ip6t_standard { struct ip6t_entry entry; struct xt_standard_target target; }; struct ip6t_error { struct ip6t_entry entry; struct xt_error_target target; }; #define IP6T_ENTRY_INIT(__size) \ { \ .target_offset = sizeof(struct ip6t_entry), \ .next_offset = (__size), \ } #define IP6T_STANDARD_INIT(__verdict) \ { \ .entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_standard)), \ .target = XT_TARGET_INIT(XT_STANDARD_TARGET, \ sizeof(struct xt_standard_target)), \ .target.verdict = -(__verdict) - 1, \ } #define IP6T_ERROR_INIT \ { \ .entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_error)), \ .target = XT_TARGET_INIT(XT_ERROR_TARGET, \ sizeof(struct xt_error_target)), \ .target.errorname = "ERROR", \ } /* * New IP firewall options for [gs]etsockopt at the RAW IP level. * Unlike BSD Linux inherits IP options so you don't have to use * a raw socket for this. Instead we check rights in the calls. * * ATTENTION: check linux/in6.h before adding new number here. */ #define IP6T_BASE_CTL 64 #define IP6T_SO_SET_REPLACE (IP6T_BASE_CTL) #define IP6T_SO_SET_ADD_COUNTERS (IP6T_BASE_CTL + 1) #define IP6T_SO_SET_MAX IP6T_SO_SET_ADD_COUNTERS #define IP6T_SO_GET_INFO (IP6T_BASE_CTL) #define IP6T_SO_GET_ENTRIES (IP6T_BASE_CTL + 1) #define IP6T_SO_GET_REVISION_MATCH (IP6T_BASE_CTL + 4) #define IP6T_SO_GET_REVISION_TARGET (IP6T_BASE_CTL + 5) #define IP6T_SO_GET_MAX IP6T_SO_GET_REVISION_TARGET /* obtain original address if REDIRECT'd connection */ #define IP6T_SO_ORIGINAL_DST 80 /* ICMP matching stuff */ struct ip6t_icmp { __u8 type; /* type to match */ __u8 code[2]; /* range of code */ __u8 invflags; /* Inverse flags */ }; /* Values for "inv" field for struct ipt_icmp. */ #define IP6T_ICMP_INV 0x01 /* Invert the sense of type/code test */ /* The argument to IP6T_SO_GET_INFO */ struct ip6t_getinfo { /* Which table: caller fills this in. */ char name[XT_TABLE_MAXNAMELEN]; /* Kernel fills these in. */ /* Which hook entry points are valid: bitmask */ unsigned int valid_hooks; /* Hook entry points: one per netfilter hook. */ unsigned int hook_entry[NF_INET_NUMHOOKS]; /* Underflow points. */ unsigned int underflow[NF_INET_NUMHOOKS]; /* Number of entries */ unsigned int num_entries; /* Size of entries. */ unsigned int size; }; /* The argument to IP6T_SO_SET_REPLACE. */ struct ip6t_replace { /* Which table. */ char name[XT_TABLE_MAXNAMELEN]; /* Which hook entry points are valid: bitmask. You can't change this. */ unsigned int valid_hooks; /* Number of entries */ unsigned int num_entries; /* Total size of new entries */ unsigned int size; /* Hook entry points. */ unsigned int hook_entry[NF_INET_NUMHOOKS]; /* Underflow points. */ unsigned int underflow[NF_INET_NUMHOOKS]; /* Information about old entries: */ /* Number of counters (must be equal to current number of entries). */ unsigned int num_counters; /* The old entries' counters. */ struct xt_counters __user *counters; /* The entries (hang off end: not really an array). */ struct ip6t_entry entries[0]; }; /* The argument to IP6T_SO_GET_ENTRIES. */ struct ip6t_get_entries { /* Which table: user fills this in. */ char name[XT_TABLE_MAXNAMELEN]; /* User fills this in: total entry size. */ unsigned int size; /* The entries. */ struct ip6t_entry entrytable[0]; }; /* Helper functions */ static __inline__ struct xt_entry_target * ip6t_get_target(struct ip6t_entry *e) { return (struct xt_entry_target *)((char *)e + e->target_offset); } /* * Main firewall chains definitions and global var's definitions. */ #endif /* _UAPI_IP6_TABLES_H */
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_HUGE_MM_H #define _LINUX_HUGE_MM_H #include <linux/sched/coredump.h> #include <linux/mm_types.h> #include <linux/fs.h> /* only for vma_is_dax() */ vm_fault_t do_huge_pmd_anonymous_page(struct vm_fault *vmf); int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, pmd_t *dst_pmd, pmd_t *src_pmd, unsigned long addr, struct vm_area_struct *dst_vma, struct vm_area_struct *src_vma); void huge_pmd_set_accessed(struct vm_fault *vmf, pmd_t orig_pmd); int copy_huge_pud(struct mm_struct *dst_mm, struct mm_struct *src_mm, pud_t *dst_pud, pud_t *src_pud, unsigned long addr, struct vm_area_struct *vma); #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD void huge_pud_set_accessed(struct vm_fault *vmf, pud_t orig_pud); #else static inline void huge_pud_set_accessed(struct vm_fault *vmf, pud_t orig_pud) { } #endif vm_fault_t do_huge_pmd_wp_page(struct vm_fault *vmf, pmd_t orig_pmd); struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmd, unsigned int flags); bool madvise_free_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr, unsigned long next); int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr); int zap_huge_pud(struct mmu_gather *tlb, struct vm_area_struct *vma, pud_t *pud, unsigned long addr); bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr, unsigned long new_addr, pmd_t *old_pmd, pmd_t *new_pmd); int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr, pgprot_t newprot, unsigned long cp_flags); vm_fault_t vmf_insert_pfn_pmd_prot(struct vm_fault *vmf, pfn_t pfn, pgprot_t pgprot, bool write); /** * vmf_insert_pfn_pmd - insert a pmd size pfn * @vmf: Structure describing the fault * @pfn: pfn to insert * @pgprot: page protection to use * @write: whether it's a write fault * * Insert a pmd size pfn. See vmf_insert_pfn() for additional info. * * Return: vm_fault_t value. */ static inline vm_fault_t vmf_insert_pfn_pmd(struct vm_fault *vmf, pfn_t pfn, bool write) { return vmf_insert_pfn_pmd_prot(vmf, pfn, vmf->vma->vm_page_prot, write); } vm_fault_t vmf_insert_pfn_pud_prot(struct vm_fault *vmf, pfn_t pfn, pgprot_t pgprot, bool write); /** * vmf_insert_pfn_pud - insert a pud size pfn * @vmf: Structure describing the fault * @pfn: pfn to insert * @pgprot: page protection to use * @write: whether it's a write fault * * Insert a pud size pfn. See vmf_insert_pfn() for additional info. * * Return: vm_fault_t value. */ static inline vm_fault_t vmf_insert_pfn_pud(struct vm_fault *vmf, pfn_t pfn, bool write) { return vmf_insert_pfn_pud_prot(vmf, pfn, vmf->vma->vm_page_prot, write); } enum transparent_hugepage_flag { TRANSPARENT_HUGEPAGE_NEVER_DAX, TRANSPARENT_HUGEPAGE_FLAG, TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG, TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG, TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG, #ifdef CONFIG_DEBUG_VM TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG, #endif }; struct kobject; struct kobj_attribute; ssize_t single_hugepage_flag_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t count, enum transparent_hugepage_flag flag); ssize_t single_hugepage_flag_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf, enum transparent_hugepage_flag flag); extern struct kobj_attribute shmem_enabled_attr; #define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT) #define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER) #ifdef CONFIG_TRANSPARENT_HUGEPAGE #define HPAGE_PMD_SHIFT PMD_SHIFT #define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT) #define HPAGE_PMD_MASK (~(HPAGE_PMD_SIZE - 1)) #define HPAGE_PUD_SHIFT PUD_SHIFT #define HPAGE_PUD_SIZE ((1UL) << HPAGE_PUD_SHIFT) #define HPAGE_PUD_MASK (~(HPAGE_PUD_SIZE - 1)) extern unsigned long transparent_hugepage_flags; static inline bool transhuge_vma_suitable(struct vm_area_struct *vma, unsigned long haddr) { /* Don't have to check pgoff for anonymous vma */ if (!vma_is_anonymous(vma)) { if (!IS_ALIGNED((vma->vm_start >> PAGE_SHIFT) - vma->vm_pgoff, HPAGE_PMD_NR)) return false; } if (haddr < vma->vm_start || haddr + HPAGE_PMD_SIZE > vma->vm_end) return false; return true; } static inline bool transhuge_vma_enabled(struct vm_area_struct *vma, unsigned long vm_flags) { /* Explicitly disabled through madvise. */ if ((vm_flags & VM_NOHUGEPAGE) || test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags)) return false; return true; } /* * to be used on vmas which are known to support THP. * Use transparent_hugepage_active otherwise */ static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma) { /* * If the hardware/firmware marked hugepage support disabled. */ if (transparent_hugepage_flags & (1 << TRANSPARENT_HUGEPAGE_NEVER_DAX)) return false; if (!transhuge_vma_enabled(vma, vma->vm_flags)) return false; if (vma_is_temporary_stack(vma)) return false; if (transparent_hugepage_flags & (1 << TRANSPARENT_HUGEPAGE_FLAG)) return true; if (vma_is_dax(vma)) return true; if (transparent_hugepage_flags & (1 << TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG)) return !!(vma->vm_flags & VM_HUGEPAGE); return false; } bool transparent_hugepage_active(struct vm_area_struct *vma); #define transparent_hugepage_use_zero_page() \ (transparent_hugepage_flags & \ (1<<TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG)) unsigned long thp_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags); void prep_transhuge_page(struct page *page); void free_transhuge_page(struct page *page); bool is_transparent_hugepage(struct page *page); bool can_split_huge_page(struct page *page, int *pextra_pins); int split_huge_page_to_list(struct page *page, struct list_head *list); static inline int split_huge_page(struct page *page) { return split_huge_page_to_list(page, NULL); } void deferred_split_huge_page(struct page *page); void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, unsigned long address, bool freeze, struct page *page); #define split_huge_pmd(__vma, __pmd, __address) \ do { \ pmd_t *____pmd = (__pmd); \ if (is_swap_pmd(*____pmd) || pmd_trans_huge(*____pmd) \ || pmd_devmap(*____pmd)) \ __split_huge_pmd(__vma, __pmd, __address, \ false, NULL); \ } while (0) void split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address, bool freeze, struct page *page); void __split_huge_pud(struct vm_area_struct *vma, pud_t *pud, unsigned long address); #define split_huge_pud(__vma, __pud, __address) \ do { \ pud_t *____pud = (__pud); \ if (pud_trans_huge(*____pud) \ || pud_devmap(*____pud)) \ __split_huge_pud(__vma, __pud, __address); \ } while (0) int hugepage_madvise(struct vm_area_struct *vma, unsigned long *vm_flags, int advice); void vma_adjust_trans_huge(struct vm_area_struct *vma, unsigned long start, unsigned long end, long adjust_next); spinlock_t *__pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma); spinlock_t *__pud_trans_huge_lock(pud_t *pud, struct vm_area_struct *vma); static inline int is_swap_pmd(pmd_t pmd) { return !pmd_none(pmd) && !pmd_present(pmd); } /* mmap_lock must be held on entry */ static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma) { if (is_swap_pmd(*pmd) || pmd_trans_huge(*pmd) || pmd_devmap(*pmd)) return __pmd_trans_huge_lock(pmd, vma); else return NULL; } static inline spinlock_t *pud_trans_huge_lock(pud_t *pud, struct vm_area_struct *vma) { if (pud_trans_huge(*pud) || pud_devmap(*pud)) return __pud_trans_huge_lock(pud, vma); else return NULL; } /** * thp_head - Head page of a transparent huge page. * @page: Any page (tail, head or regular) found in the page cache. */ static inline struct page *thp_head(struct page *page) { return compound_head(page); } /** * thp_order - Order of a transparent huge page. * @page: Head page of a transparent huge page. */ static inline unsigned int thp_order(struct page *page) { VM_BUG_ON_PGFLAGS(PageTail(page), page); if (PageHead(page)) return HPAGE_PMD_ORDER; return 0; } /** * thp_nr_pages - The number of regular pages in this huge page. * @page: The head page of a huge page. */ static inline int thp_nr_pages(struct page *page) { VM_BUG_ON_PGFLAGS(PageTail(page), page); if (PageHead(page)) return HPAGE_PMD_NR; return 1; } struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmd, int flags, struct dev_pagemap **pgmap); struct page *follow_devmap_pud(struct vm_area_struct *vma, unsigned long addr, pud_t *pud, int flags, struct dev_pagemap **pgmap); vm_fault_t do_huge_pmd_numa_page(struct vm_fault *vmf, pmd_t orig_pmd); extern struct page *huge_zero_page; extern unsigned long huge_zero_pfn; static inline bool is_huge_zero_page(struct page *page) { return READ_ONCE(huge_zero_page) == page; } static inline bool is_huge_zero_pmd(pmd_t pmd) { return READ_ONCE(huge_zero_pfn) == pmd_pfn(pmd) && pmd_present(pmd); } static inline bool is_huge_zero_pud(pud_t pud) { return false; } struct page *mm_get_huge_zero_page(struct mm_struct *mm); void mm_put_huge_zero_page(struct mm_struct *mm); #define mk_huge_pmd(page, prot) pmd_mkhuge(mk_pmd(page, prot)) static inline bool thp_migration_supported(void) { return IS_ENABLED(CONFIG_ARCH_ENABLE_THP_MIGRATION); } static inline struct list_head *page_deferred_list(struct page *page) { /* * Global or memcg deferred list in the second tail pages is * occupied by compound_head. */ return &page[2].deferred_list; } #else /* CONFIG_TRANSPARENT_HUGEPAGE */ #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) #define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; }) #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; }) #define HPAGE_PUD_SHIFT ({ BUILD_BUG(); 0; }) #define HPAGE_PUD_MASK ({ BUILD_BUG(); 0; }) #define HPAGE_PUD_SIZE ({ BUILD_BUG(); 0; }) static inline struct page *thp_head(struct page *page) { VM_BUG_ON_PGFLAGS(PageTail(page), page); return page; } static inline unsigned int thp_order(struct page *page) { VM_BUG_ON_PGFLAGS(PageTail(page), page); return 0; } static inline int thp_nr_pages(struct page *page) { VM_BUG_ON_PGFLAGS(PageTail(page), page); return 1; } static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma) { return false; } static inline bool transparent_hugepage_active(struct vm_area_struct *vma) { return false; } static inline bool transhuge_vma_suitable(struct vm_area_struct *vma, unsigned long haddr) { return false; } static inline bool transhuge_vma_enabled(struct vm_area_struct *vma, unsigned long vm_flags) { return false; } static inline void prep_transhuge_page(struct page *page) {} static inline bool is_transparent_hugepage(struct page *page) { return false; } #define transparent_hugepage_flags 0UL #define thp_get_unmapped_area NULL static inline bool can_split_huge_page(struct page *page, int *pextra_pins) { BUILD_BUG(); return false; } static inline int split_huge_page_to_list(struct page *page, struct list_head *list) { return 0; } static inline int split_huge_page(struct page *page) { return 0; } static inline void deferred_split_huge_page(struct page *page) {} #define split_huge_pmd(__vma, __pmd, __address) \ do { } while (0) static inline void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, unsigned long address, bool freeze, struct page *page) {} static inline void split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address, bool freeze, struct page *page) {} #define split_huge_pud(__vma, __pmd, __address) \ do { } while (0) static inline int hugepage_madvise(struct vm_area_struct *vma, unsigned long *vm_flags, int advice) { BUG(); return 0; } static inline void vma_adjust_trans_huge(struct vm_area_struct *vma, unsigned long start, unsigned long end, long adjust_next) { } static inline int is_swap_pmd(pmd_t pmd) { return 0; } static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma) { return NULL; } static inline spinlock_t *pud_trans_huge_lock(pud_t *pud, struct vm_area_struct *vma) { return NULL; } static inline vm_fault_t do_huge_pmd_numa_page(struct vm_fault *vmf, pmd_t orig_pmd) { return 0; } static inline bool is_huge_zero_page(struct page *page) { return false; } static inline bool is_huge_zero_pmd(pmd_t pmd) { return false; } static inline bool is_huge_zero_pud(pud_t pud) { return false; } static inline void mm_put_huge_zero_page(struct mm_struct *mm) { return; } static inline struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmd, int flags, struct dev_pagemap **pgmap) { return NULL; } static inline struct page *follow_devmap_pud(struct vm_area_struct *vma, unsigned long addr, pud_t *pud, int flags, struct dev_pagemap **pgmap) { return NULL; } static inline bool thp_migration_supported(void) { return false; } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ /** * thp_size - Size of a transparent huge page. * @page: Head page of a transparent huge page. * * Return: Number of bytes in this page. */ static inline unsigned long thp_size(struct page *page) { return PAGE_SIZE << thp_order(page); } #endif /* _LINUX_HUGE_MM_H */
1 1 1 1 1 1 1 1 1 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 // SPDX-License-Identifier: GPL-2.0 /* * SCSI functions used by both the initiator and the target code. */ #include <linux/bug.h> #include <linux/kernel.h> #include <linux/string.h> #include <linux/errno.h> #include <asm/unaligned.h> #include <scsi/scsi_common.h> /* NB: These are exposed through /proc/scsi/scsi and form part of the ABI. * You may not alter any existing entry (although adding new ones is * encouraged once assigned by ANSI/INCITS T10). */ static const char *const scsi_device_types[] = { "Direct-Access ", "Sequential-Access", "Printer ", "Processor ", "WORM ", "CD-ROM ", "Scanner ", "Optical Device ", "Medium Changer ", "Communications ", "ASC IT8 ", "ASC IT8 ", "RAID ", "Enclosure ", "Direct-Access-RBC", "Optical card ", "Bridge controller", "Object storage ", "Automation/Drive ", "Security Manager ", "Direct-Access-ZBC", }; /** * scsi_device_type - Return 17-char string indicating device type. * @type: type number to look up */ const char *scsi_device_type(unsigned type) { if (type == 0x1e) return "Well-known LUN "; if (type == 0x1f) return "No Device "; if (type >= ARRAY_SIZE(scsi_device_types)) return "Unknown "; return scsi_device_types[type]; } EXPORT_SYMBOL(scsi_device_type); /** * scsilun_to_int - convert a scsi_lun to an int * @scsilun: struct scsi_lun to be converted. * * Description: * Convert @scsilun from a struct scsi_lun to a four-byte host byte-ordered * integer, and return the result. The caller must check for * truncation before using this function. * * Notes: * For a description of the LUN format, post SCSI-3 see the SCSI * Architecture Model, for SCSI-3 see the SCSI Controller Commands. * * Given a struct scsi_lun of: d2 04 0b 03 00 00 00 00, this function * returns the integer: 0x0b03d204 * * This encoding will return a standard integer LUN for LUNs smaller * than 256, which typically use a single level LUN structure with * addressing method 0. */ u64 scsilun_to_int(struct scsi_lun *scsilun) { int i; u64 lun; lun = 0; for (i = 0; i < sizeof(lun); i += 2) lun = lun | (((u64)scsilun->scsi_lun[i] << ((i + 1) * 8)) | ((u64)scsilun->scsi_lun[i + 1] << (i * 8))); return lun; } EXPORT_SYMBOL(scsilun_to_int); /** * int_to_scsilun - reverts an int into a scsi_lun * @lun: integer to be reverted * @scsilun: struct scsi_lun to be set. * * Description: * Reverts the functionality of the scsilun_to_int, which packed * an 8-byte lun value into an int. This routine unpacks the int * back into the lun value. * * Notes: * Given an integer : 0x0b03d204, this function returns a * struct scsi_lun of: d2 04 0b 03 00 00 00 00 * */ void int_to_scsilun(u64 lun, struct scsi_lun *scsilun) { int i; memset(scsilun->scsi_lun, 0, sizeof(scsilun->scsi_lun)); for (i = 0; i < sizeof(lun); i += 2) { scsilun->scsi_lun[i] = (lun >> 8) & 0xFF; scsilun->scsi_lun[i+1] = lun & 0xFF; lun = lun >> 16; } } EXPORT_SYMBOL(int_to_scsilun); /** * scsi_normalize_sense - normalize main elements from either fixed or * descriptor sense data format into a common format. * * @sense_buffer: byte array containing sense data returned by device * @sb_len: number of valid bytes in sense_buffer * @sshdr: pointer to instance of structure that common * elements are written to. * * Notes: * The "main elements" from sense data are: response_code, sense_key, * asc, ascq and additional_length (only for descriptor format). * * Typically this function can be called after a device has * responded to a SCSI command with the CHECK_CONDITION status. * * Return value: * true if valid sense data information found, else false; */ bool scsi_normalize_sense(const u8 *sense_buffer, int sb_len, struct scsi_sense_hdr *sshdr) { memset(sshdr, 0, sizeof(struct scsi_sense_hdr)); if (!sense_buffer || !sb_len) return false; sshdr->response_code = (sense_buffer[0] & 0x7f); if (!scsi_sense_valid(sshdr)) return false; if (sshdr->response_code >= 0x72) { /* * descriptor format */ if (sb_len > 1) sshdr->sense_key = (sense_buffer[1] & 0xf); if (sb_len > 2) sshdr->asc = sense_buffer[2]; if (sb_len > 3) sshdr->ascq = sense_buffer[3]; if (sb_len > 7) sshdr->additional_length = sense_buffer[7]; } else { /* * fixed format */ if (sb_len > 2) sshdr->sense_key = (sense_buffer[2] & 0xf); if (sb_len > 7) { sb_len = (sb_len < (sense_buffer[7] + 8)) ? sb_len : (sense_buffer[7] + 8); if (sb_len > 12) sshdr->asc = sense_buffer[12]; if (sb_len > 13) sshdr->ascq = sense_buffer[13]; } } return true; } EXPORT_SYMBOL(scsi_normalize_sense); /** * scsi_sense_desc_find - search for a given descriptor type in descriptor sense data format. * @sense_buffer: byte array of descriptor format sense data * @sb_len: number of valid bytes in sense_buffer * @desc_type: value of descriptor type to find * (e.g. 0 -> information) * * Notes: * only valid when sense data is in descriptor format * * Return value: * pointer to start of (first) descriptor if found else NULL */ const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len, int desc_type) { int add_sen_len, add_len, desc_len, k; const u8 * descp; if ((sb_len < 8) || (0 == (add_sen_len = sense_buffer[7]))) return NULL; if ((sense_buffer[0] < 0x72) || (sense_buffer[0] > 0x73)) return NULL; add_sen_len = (add_sen_len < (sb_len - 8)) ? add_sen_len : (sb_len - 8); descp = &sense_buffer[8]; for (desc_len = 0, k = 0; k < add_sen_len; k += desc_len) { descp += desc_len; add_len = (k < (add_sen_len - 1)) ? descp[1]: -1; desc_len = add_len + 2; if (descp[0] == desc_type) return descp; if (add_len < 0) // short descriptor ?? break; } return NULL; } EXPORT_SYMBOL(scsi_sense_desc_find); /** * scsi_build_sense_buffer - build sense data in a buffer * @desc: Sense format (non-zero == descriptor format, * 0 == fixed format) * @buf: Where to build sense data * @key: Sense key * @asc: Additional sense code * @ascq: Additional sense code qualifier * **/ void scsi_build_sense_buffer(int desc, u8 *buf, u8 key, u8 asc, u8 ascq) { if (desc) { buf[0] = 0x72; /* descriptor, current */ buf[1] = key; buf[2] = asc; buf[3] = ascq; buf[7] = 0; } else { buf[0] = 0x70; /* fixed, current */ buf[2] = key; buf[7] = 0xa; buf[12] = asc; buf[13] = ascq; } } EXPORT_SYMBOL(scsi_build_sense_buffer); /** * scsi_set_sense_information - set the information field in a * formatted sense data buffer * @buf: Where to build sense data * @buf_len: buffer length * @info: 64-bit information value to be set * * Return value: * 0 on success or -EINVAL for invalid sense buffer length **/ int scsi_set_sense_information(u8 *buf, int buf_len, u64 info) { if ((buf[0] & 0x7f) == 0x72) { u8 *ucp, len; len = buf[7]; ucp = (char *)scsi_sense_desc_find(buf, len + 8, 0); if (!ucp) { buf[7] = len + 0xc; ucp = buf + 8 + len; } if (buf_len < len + 0xc) /* Not enough room for info */ return -EINVAL; ucp[0] = 0; ucp[1] = 0xa; ucp[2] = 0x80; /* Valid bit */ ucp[3] = 0; put_unaligned_be64(info, &ucp[4]); } else if ((buf[0] & 0x7f) == 0x70) { /* * Only set the 'VALID' bit if we can represent the value * correctly; otherwise just fill out the lower bytes and * clear the 'VALID' flag. */ if (info <= 0xffffffffUL) buf[0] |= 0x80; else buf[0] &= 0x7f; put_unaligned_be32((u32)info, &buf[3]); } return 0; } EXPORT_SYMBOL(scsi_set_sense_information); /** * scsi_set_sense_field_pointer - set the field pointer sense key * specific information in a formatted sense data buffer * @buf: Where to build sense data * @buf_len: buffer length * @fp: field pointer to be set * @bp: bit pointer to be set * @cd: command/data bit * * Return value: * 0 on success or -EINVAL for invalid sense buffer length */ int scsi_set_sense_field_pointer(u8 *buf, int buf_len, u16 fp, u8 bp, bool cd) { u8 *ucp, len; if ((buf[0] & 0x7f) == 0x72) { len = buf[7]; ucp = (char *)scsi_sense_desc_find(buf, len + 8, 2); if (!ucp) { buf[7] = len + 8; ucp = buf + 8 + len; } if (buf_len < len + 8) /* Not enough room for info */ return -EINVAL; ucp[0] = 2; ucp[1] = 6; ucp[4] = 0x80; /* Valid bit */ if (cd) ucp[4] |= 0x40; if (bp < 0x8) ucp[4] |= 0x8 | bp; put_unaligned_be16(fp, &ucp[5]); } else if ((buf[0] & 0x7f) == 0x70) { len = buf[7]; if (len < 18) buf[7] = 18; buf[15] = 0x80; if (cd) buf[15] |= 0x40; if (bp < 0x8) buf[15] |= 0x8 | bp; put_unaligned_be16(fp, &buf[16]); } return 0; } EXPORT_SYMBOL(scsi_set_sense_field_pointer);
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 /* SPDX-License-Identifier: GPL-2.0-or-later */ /* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * Definitions of the Internet Protocol. * * Version: @(#)in.h 1.0.1 04/21/93 * * Authors: Original taken from the GNU Project <netinet/in.h> file. * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> */ #ifndef _LINUX_IN_H #define _LINUX_IN_H #include <linux/errno.h> #include <uapi/linux/in.h> static inline int proto_ports_offset(int proto) { switch (proto) { case IPPROTO_TCP: case IPPROTO_UDP: case IPPROTO_DCCP: case IPPROTO_ESP: /* SPI */ case IPPROTO_SCTP: case IPPROTO_UDPLITE: return 0; case IPPROTO_AH: /* SPI */ return 4; default: return -EINVAL; } } static inline bool ipv4_is_loopback(__be32 addr) { return (addr & htonl(0xff000000)) == htonl(0x7f000000); } static inline bool ipv4_is_multicast(__be32 addr) { return (addr & htonl(0xf0000000)) == htonl(0xe0000000); } static inline bool ipv4_is_local_multicast(__be32 addr) { return (addr & htonl(0xffffff00)) == htonl(0xe0000000); } static inline bool ipv4_is_lbcast(__be32 addr) { /* limited broadcast */ return addr == htonl(INADDR_BROADCAST); } static inline bool ipv4_is_all_snoopers(__be32 addr) { return addr == htonl(INADDR_ALLSNOOPERS_GROUP); } static inline bool ipv4_is_zeronet(__be32 addr) { return (addr == 0); } /* Special-Use IPv4 Addresses (RFC3330) */ static inline bool ipv4_is_private_10(__be32 addr) { return (addr & htonl(0xff000000)) == htonl(0x0a000000); } static inline bool ipv4_is_private_172(__be32 addr) { return (addr & htonl(0xfff00000)) == htonl(0xac100000); } static inline bool ipv4_is_private_192(__be32 addr) { return (addr & htonl(0xffff0000)) == htonl(0xc0a80000); } static inline bool ipv4_is_linklocal_169(__be32 addr) { return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000); } static inline bool ipv4_is_anycast_6to4(__be32 addr) { return (addr & htonl(0xffffff00)) == htonl(0xc0586300); } static inline bool ipv4_is_test_192(__be32 addr) { return (addr & htonl(0xffffff00)) == htonl(0xc0000200); } static inline bool ipv4_is_test_198(__be32 addr) { return (addr & htonl(0xfffe0000)) == htonl(0xc6120000); } #endif /* _LINUX_IN_H */
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 /* SPDX-License-Identifier: GPL-2.0-only */ /* * linux/fs/pnode.h * * (C) Copyright IBM Corporation 2005. */ #ifndef _LINUX_PNODE_H #define _LINUX_PNODE_H #include <linux/list.h> #include "mount.h" #define IS_MNT_SHARED(m) ((m)->mnt.mnt_flags & MNT_SHARED) #define IS_MNT_SLAVE(m) ((m)->mnt_master) #define IS_MNT_NEW(m) (!(m)->mnt_ns || is_anon_ns((m)->mnt_ns)) #define CLEAR_MNT_SHARED(m) ((m)->mnt.mnt_flags &= ~MNT_SHARED) #define IS_MNT_UNBINDABLE(m) ((m)->mnt.mnt_flags & MNT_UNBINDABLE) #define IS_MNT_MARKED(m) ((m)->mnt.mnt_flags & MNT_MARKED) #define SET_MNT_MARK(m) ((m)->mnt.mnt_flags |= MNT_MARKED) #define CLEAR_MNT_MARK(m) ((m)->mnt.mnt_flags &= ~MNT_MARKED) #define IS_MNT_LOCKED(m) ((m)->mnt.mnt_flags & MNT_LOCKED) #define CL_EXPIRE 0x01 #define CL_SLAVE 0x02 #define CL_COPY_UNBINDABLE 0x04 #define CL_MAKE_SHARED 0x08 #define CL_PRIVATE 0x10 #define CL_SHARED_TO_SLAVE 0x20 #define CL_COPY_MNT_NS_FILE 0x40 #define CL_COPY_ALL (CL_COPY_UNBINDABLE | CL_COPY_MNT_NS_FILE) static inline void set_mnt_shared(struct mount *mnt) { mnt->mnt.mnt_flags &= ~MNT_SHARED_MASK; mnt->mnt.mnt_flags |= MNT_SHARED; } void change_mnt_propagation(struct mount *, int); int propagate_mnt(struct mount *, struct mountpoint *, struct mount *, struct hlist_head *); int propagate_umount(struct list_head *); int propagate_mount_busy(struct mount *, int); void propagate_mount_unlock(struct mount *); void mnt_release_group_id(struct mount *); int get_dominating_id(struct mount *mnt, const struct path *root); int mnt_get_count(struct mount *mnt); void mnt_set_mountpoint(struct mount *, struct mountpoint *, struct mount *); void mnt_change_mountpoint(struct mount *parent, struct mountpoint *mp, struct mount *mnt); struct mount *copy_tree(struct mount *, struct dentry *, int); bool is_path_reachable(struct mount *, struct dentry *, const struct path *root); int count_mounts(struct mnt_namespace *ns, struct mount *mnt); #endif /* _LINUX_PNODE_H */
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 /* SPDX-License-Identifier: GPL-2.0 */ #ifndef __NET_IP_TUNNELS_H #define __NET_IP_TUNNELS_H 1 #include <linux/if_tunnel.h> #include <linux/netdevice.h> #include <linux/skbuff.h> #include <linux/socket.h> #include <linux/types.h> #include <linux/u64_stats_sync.h> #include <linux/bitops.h> #include <net/dsfield.h> #include <net/gro_cells.h> #include <net/inet_ecn.h> #include <net/netns/generic.h> #include <net/rtnetlink.h> #include <net/lwtunnel.h> #include <net/dst_cache.h> #if IS_ENABLED(CONFIG_IPV6) #include <net/ipv6.h> #include <net/ip6_fib.h> #include <net/ip6_route.h> #endif /* Keep error state on tunnel for 30 sec */ #define IPTUNNEL_ERR_TIMEO (30*HZ) /* Used to memset ip_tunnel padding. */ #define IP_TUNNEL_KEY_SIZE offsetofend(struct ip_tunnel_key, tp_dst) /* Used to memset ipv4 address padding. */ #define IP_TUNNEL_KEY_IPV4_PAD offsetofend(struct ip_tunnel_key, u.ipv4.dst) #define IP_TUNNEL_KEY_IPV4_PAD_LEN \ (sizeof_field(struct ip_tunnel_key, u) - \ sizeof_field(struct ip_tunnel_key, u.ipv4)) struct ip_tunnel_key { __be64 tun_id; union { struct { __be32 src; __be32 dst; } ipv4; struct { struct in6_addr src; struct in6_addr dst; } ipv6; } u; __be16 tun_flags; u8 tos; /* TOS for IPv4, TC for IPv6 */ u8 ttl; /* TTL for IPv4, HL for IPv6 */ __be32 label; /* Flow Label for IPv6 */ __be16 tp_src; __be16 tp_dst; }; /* Flags for ip_tunnel_info mode. */ #define IP_TUNNEL_INFO_TX 0x01 /* represents tx tunnel parameters */ #define IP_TUNNEL_INFO_IPV6 0x02 /* key contains IPv6 addresses */ #define IP_TUNNEL_INFO_BRIDGE 0x04 /* represents a bridged tunnel id */ /* Maximum tunnel options length. */ #define IP_TUNNEL_OPTS_MAX \ GENMASK((sizeof_field(struct ip_tunnel_info, \ options_len) * BITS_PER_BYTE) - 1, 0) struct ip_tunnel_info { struct ip_tunnel_key key; #ifdef CONFIG_DST_CACHE struct dst_cache dst_cache; #endif u8 options_len; u8 mode; }; /* 6rd prefix/relay information */ #ifdef CONFIG_IPV6_SIT_6RD struct ip_tunnel_6rd_parm { struct in6_addr prefix; __be32 relay_prefix; u16 prefixlen; u16 relay_prefixlen; }; #endif struct ip_tunnel_encap { u16 type; u16 flags; __be16 sport; __be16 dport; }; struct ip_tunnel_prl_entry { struct ip_tunnel_prl_entry __rcu *next; __be32 addr; u16 flags; struct rcu_head rcu_head; }; struct metadata_dst; struct ip_tunnel { struct ip_tunnel __rcu *next; struct hlist_node hash_node; struct net_device *dev; struct net *net; /* netns for packet i/o */ unsigned long err_time; /* Time when the last ICMP error * arrived */ int err_count; /* Number of arrived ICMP errors */ /* These four fields used only by GRE */ u32 i_seqno; /* The last seen seqno */ u32 o_seqno; /* The last output seqno */ int tun_hlen; /* Precalculated header length */ /* These four fields used only by ERSPAN */ u32 index; /* ERSPAN type II index */ u8 erspan_ver; /* ERSPAN version */ u8 dir; /* ERSPAN direction */ u16 hwid; /* ERSPAN hardware ID */ struct dst_cache dst_cache; struct ip_tunnel_parm parms; int mlink; int encap_hlen; /* Encap header length (FOU,GUE) */ int hlen; /* tun_hlen + encap_hlen */ struct ip_tunnel_encap encap; /* for SIT */ #ifdef CONFIG_IPV6_SIT_6RD struct ip_tunnel_6rd_parm ip6rd; #endif struct ip_tunnel_prl_entry __rcu *prl; /* potential router list */ unsigned int prl_count; /* # of entries in PRL */ unsigned int ip_tnl_net_id; struct gro_cells gro_cells; __u32 fwmark; bool collect_md; bool ignore_df; }; struct tnl_ptk_info { __be16 flags; __be16 proto; __be32 key; __be32 seq; int hdr_len; }; #define PACKET_RCVD 0 #define PACKET_REJECT 1 #define PACKET_NEXT 2 #define IP_TNL_HASH_BITS 7 #define IP_TNL_HASH_SIZE (1 << IP_TNL_HASH_BITS) struct ip_tunnel_net { struct net_device *fb_tunnel_dev; struct rtnl_link_ops *rtnl_link_ops; struct hlist_head tunnels[IP_TNL_HASH_SIZE]; struct ip_tunnel __rcu *collect_md_tun; int type; }; static inline void ip_tunnel_key_init(struct ip_tunnel_key *key, __be32 saddr, __be32 daddr, u8 tos, u8 ttl, __be32 label, __be16 tp_src, __be16 tp_dst, __be64 tun_id, __be16 tun_flags) { key->tun_id = tun_id; key->u.ipv4.src = saddr; key->u.ipv4.dst = daddr; memset((unsigned char *)key + IP_TUNNEL_KEY_IPV4_PAD, 0, IP_TUNNEL_KEY_IPV4_PAD_LEN); key->tos = tos; key->ttl = ttl; key->label = label; key->tun_flags = tun_flags; /* For the tunnel types on the top of IPsec, the tp_src and tp_dst of * the upper tunnel are used. * E.g: GRE over IPSEC, the tp_src and tp_port are zero. */ key->tp_src = tp_src; key->tp_dst = tp_dst; /* Clear struct padding. */ if (sizeof(*key) != IP_TUNNEL_KEY_SIZE) memset((unsigned char *)key + IP_TUNNEL_KEY_SIZE, 0, sizeof(*key) - IP_TUNNEL_KEY_SIZE); } static inline bool ip_tunnel_dst_cache_usable(const struct sk_buff *skb, const struct ip_tunnel_info *info) { if (skb->mark) return false; if (!info) return true; if (info->key.tun_flags & TUNNEL_NOCACHE) return false; return true; } static inline unsigned short ip_tunnel_info_af(const struct ip_tunnel_info *tun_info) { return tun_info->mode & IP_TUNNEL_INFO_IPV6 ? AF_INET6 : AF_INET; } static inline __be64 key32_to_tunnel_id(__be32 key) { #ifdef __BIG_ENDIAN return (__force __be64)key; #else return (__force __be64)((__force u64)key << 32); #endif } /* Returns the least-significant 32 bits of a __be64. */ static inline __be32 tunnel_id_to_key32(__be64 tun_id) { #ifdef __BIG_ENDIAN return (__force __be32)tun_id; #else return (__force __be32)((__force u64)tun_id >> 32); #endif } #ifdef CONFIG_INET static inline void ip_tunnel_init_flow(struct flowi4 *fl4, int proto, __be32 daddr, __be32 saddr, __be32 key, __u8 tos, int oif, __u32 mark, __u32 tun_inner_hash) { memset(fl4, 0, sizeof(*fl4)); fl4->flowi4_oif = oif; fl4->daddr = daddr; fl4->saddr = saddr; fl4->flowi4_tos = tos; fl4->flowi4_proto = proto; fl4->fl4_gre_key = key; fl4->flowi4_mark = mark; fl4->flowi4_multipath_hash = tun_inner_hash; } int ip_tunnel_init(struct net_device *dev); void ip_tunnel_uninit(struct net_device *dev); void ip_tunnel_dellink(struct net_device *dev, struct list_head *head); struct net *ip_tunnel_get_link_net(const struct net_device *dev); int ip_tunnel_get_iflink(const struct net_device *dev); int ip_tunnel_init_net(struct net *net, unsigned int ip_tnl_net_id, struct rtnl_link_ops *ops, char *devname); void ip_tunnel_delete_nets(struct list_head *list_net, unsigned int id, struct rtnl_link_ops *ops); void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, const struct iphdr *tnl_params, const u8 protocol); void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, const u8 proto, int tunnel_hlen); int ip_tunnel_ctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd); int ip_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict); int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu); void ip_tunnel_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *tot); struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn, int link, __be16 flags, __be32 remote, __be32 local, __be32 key); int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb, const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst, bool log_ecn_error); int ip_tunnel_changelink(struct net_device *dev, struct nlattr *tb[], struct ip_tunnel_parm *p, __u32 fwmark); int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[], struct ip_tunnel_parm *p, __u32 fwmark); void ip_tunnel_setup(struct net_device *dev, unsigned int net_id); extern const struct header_ops ip_tunnel_header_ops; __be16 ip_tunnel_parse_protocol(const struct sk_buff *skb); struct ip_tunnel_encap_ops { size_t (*encap_hlen)(struct ip_tunnel_encap *e); int (*build_header)(struct sk_buff *skb, struct ip_tunnel_encap *e, u8 *protocol, struct flowi4 *fl4); int (*err_handler)(struct sk_buff *skb, u32 info); }; #define MAX_IPTUN_ENCAP_OPS 8 extern const struct ip_tunnel_encap_ops __rcu * iptun_encaps[MAX_IPTUN_ENCAP_OPS]; int ip_tunnel_encap_add_ops(const struct ip_tunnel_encap_ops *op, unsigned int num); int ip_tunnel_encap_del_ops(const struct ip_tunnel_encap_ops *op, unsigned int num); int ip_tunnel_encap_setup(struct ip_tunnel *t, struct ip_tunnel_encap *ipencap); static inline bool pskb_inet_may_pull(struct sk_buff *skb) { int nhlen; switch (skb->protocol) { #if IS_ENABLED(CONFIG_IPV6) case htons(ETH_P_IPV6): nhlen = sizeof(struct ipv6hdr); break; #endif case htons(ETH_P_IP): nhlen = sizeof(struct iphdr); break; default: nhlen = 0; } return pskb_network_may_pull(skb, nhlen); } static inline int ip_encap_hlen(struct ip_tunnel_encap *e) { const struct ip_tunnel_encap_ops *ops; int hlen = -EINVAL; if (e->type == TUNNEL_ENCAP_NONE) return 0; if (e->type >= MAX_IPTUN_ENCAP_OPS) return -EINVAL; rcu_read_lock(); ops = rcu_dereference(iptun_encaps[e->type]); if (likely(ops && ops->encap_hlen)) hlen = ops->encap_hlen(e); rcu_read_unlock(); return hlen; } static inline int ip_tunnel_encap(struct sk_buff *skb, struct ip_tunnel *t, u8 *protocol, struct flowi4 *fl4) { const struct ip_tunnel_encap_ops *ops; int ret = -EINVAL; if (t->encap.type == TUNNEL_ENCAP_NONE) return 0; if (t->encap.type >= MAX_IPTUN_ENCAP_OPS) return -EINVAL; rcu_read_lock(); ops = rcu_dereference(iptun_encaps[t->encap.type]); if (likely(ops && ops->build_header)) ret = ops->build_header(skb, &t->encap, protocol, fl4); rcu_read_unlock(); return ret; } /* Extract dsfield from inner protocol */ static inline u8 ip_tunnel_get_dsfield(const struct iphdr *iph, const struct sk_buff *skb) { if (skb->protocol == htons(ETH_P_IP)) return iph->tos; else if (skb->protocol == htons(ETH_P_IPV6)) return ipv6_get_dsfield((const struct ipv6hdr *)iph); else return 0; } static inline u8 ip_tunnel_get_ttl(const struct iphdr *iph, const struct sk_buff *skb) { if (skb->protocol == htons(ETH_P_IP)) return iph->ttl; else if (skb->protocol == htons(ETH_P_IPV6)) return ((const struct ipv6hdr *)iph)->hop_limit; else return 0; } /* Propogate ECN bits out */ static inline u8 ip_tunnel_ecn_encap(u8 tos, const struct iphdr *iph, const struct sk_buff *skb) { u8 inner = ip_tunnel_get_dsfield(iph, skb); return INET_ECN_encapsulate(tos, inner); } int __iptunnel_pull_header(struct sk_buff *skb, int hdr_len, __be16 inner_proto, bool raw_proto, bool xnet); static inline int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, __be16 inner_proto, bool xnet) { return __iptunnel_pull_header(skb, hdr_len, inner_proto, false, xnet); } void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, __be32 src, __be32 dst, u8 proto, u8 tos, u8 ttl, __be16 df, bool xnet); struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, gfp_t flags); int skb_tunnel_check_pmtu(struct sk_buff *skb, struct dst_entry *encap_dst, int headroom, bool reply); int iptunnel_handle_offloads(struct sk_buff *skb, int gso_type_mask); static inline int iptunnel_pull_offloads(struct sk_buff *skb) { if (skb_is_gso(skb)) { int err; err = skb_unclone(skb, GFP_ATOMIC); if (unlikely(err)) return err; skb_shinfo(skb)->gso_type &= ~(NETIF_F_GSO_ENCAP_ALL >> NETIF_F_GSO_SHIFT); } skb->encapsulation = 0; return 0; } static inline void iptunnel_xmit_stats(struct net_device *dev, int pkt_len) { if (pkt_len > 0) { struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats); u64_stats_update_begin(&tstats->syncp); tstats->tx_bytes += pkt_len; tstats->tx_packets++; u64_stats_update_end(&tstats->syncp); put_cpu_ptr(tstats); } else { struct net_device_stats *err_stats = &dev->stats; if (pkt_len < 0) { err_stats->tx_errors++; err_stats->tx_aborted_errors++; } else { err_stats->tx_dropped++; } } } static inline void *ip_tunnel_info_opts(struct ip_tunnel_info *info) { return info + 1; } static inline void ip_tunnel_info_opts_get(void *to, const struct ip_tunnel_info *info) { memcpy(to, info + 1, info->options_len); } static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info, const void *from, int len, __be16 flags) { info->options_len = len; if (len > 0) { memcpy(ip_tunnel_info_opts(info), from, len); info->key.tun_flags |= flags; } } static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) { return (struct ip_tunnel_info *)lwtstate->data; } DECLARE_STATIC_KEY_FALSE(ip_tunnel_metadata_cnt); /* Returns > 0 if metadata should be collected */ static inline int ip_tunnel_collect_metadata(void) { return static_branch_unlikely(&ip_tunnel_metadata_cnt); } void __init ip_tunnel_core_init(void); void ip_tunnel_need_metadata(void); void ip_tunnel_unneed_metadata(void); #else /* CONFIG_INET */ static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) { return NULL; } static inline void ip_tunnel_need_metadata(void) { } static inline void ip_tunnel_unneed_metadata(void) { } static inline void ip_tunnel_info_opts_get(void *to, const struct ip_tunnel_info *info) { } static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info, const void *from, int len, __be16 flags) { info->options_len = 0; } #endif /* CONFIG_INET */ #endif /* __NET_IP_TUNNELS_H */
1 1 1 1 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 // SPDX-License-Identifier: GPL-2.0-only #include <linux/module.h> #include <linux/scatterlist.h> #include <linux/mempool.h> #include <linux/slab.h> #define SG_MEMPOOL_NR ARRAY_SIZE(sg_pools) #define SG_MEMPOOL_SIZE 2 struct sg_pool { size_t size; char *name; struct kmem_cache *slab; mempool_t *pool; }; #define SP(x) { .size = x, "sgpool-" __stringify(x) } #if (SG_CHUNK_SIZE < 32) #error SG_CHUNK_SIZE is too small (must be 32 or greater) #endif static struct sg_pool sg_pools[] = { SP(8), SP(16), #if (SG_CHUNK_SIZE > 32) SP(32), #if (SG_CHUNK_SIZE > 64) SP(64), #if (SG_CHUNK_SIZE > 128) SP(128), #if (SG_CHUNK_SIZE > 256) #error SG_CHUNK_SIZE is too large (256 MAX) #endif #endif #endif #endif SP(SG_CHUNK_SIZE) }; #undef SP static inline unsigned int sg_pool_index(unsigned short nents) { unsigned int index; BUG_ON(nents > SG_CHUNK_SIZE); if (nents <= 8) index = 0; else index = get_count_order(nents) - 3; return index; } static void sg_pool_free(struct scatterlist *sgl, unsigned int nents) { struct sg_pool *sgp; sgp = sg_pools + sg_pool_index(nents); mempool_free(sgl, sgp->pool); } static struct scatterlist *sg_pool_alloc(unsigned int nents, gfp_t gfp_mask) { struct sg_pool *sgp; sgp = sg_pools + sg_pool_index(nents); return mempool_alloc(sgp->pool, gfp_mask); } /** * sg_free_table_chained - Free a previously mapped sg table * @table: The sg table header to use * @nents_first_chunk: size of the first_chunk SGL passed to * sg_alloc_table_chained * * Description: * Free an sg table previously allocated and setup with * sg_alloc_table_chained(). * * @nents_first_chunk has to be same with that same parameter passed * to sg_alloc_table_chained(). * **/ void sg_free_table_chained(struct sg_table *table, unsigned nents_first_chunk) { if (table->orig_nents <= nents_first_chunk) return; if (nents_first_chunk == 1) nents_first_chunk = 0; __sg_free_table(table, SG_CHUNK_SIZE, nents_first_chunk, sg_pool_free); } EXPORT_SYMBOL_GPL(sg_free_table_chained); /** * sg_alloc_table_chained - Allocate and chain SGLs in an sg table * @table: The sg table header to use * @nents: Number of entries in sg list * @first_chunk: first SGL * @nents_first_chunk: number of the SGL of @first_chunk * * Description: * Allocate and chain SGLs in an sg table. If @nents@ is larger than * @nents_first_chunk a chained sg table will be setup. @first_chunk is * ignored if nents_first_chunk <= 1 because user expects the SGL points * non-chain SGL. * **/ int sg_alloc_table_chained(struct sg_table *table, int nents, struct scatterlist *first_chunk, unsigned nents_first_chunk) { int ret; BUG_ON(!nents); if (first_chunk && nents_first_chunk) { if (nents <= nents_first_chunk) { table->nents = table->orig_nents = nents; sg_init_table(table->sgl, nents); return 0; } } /* User supposes that the 1st SGL includes real entry */ if (nents_first_chunk <= 1) { first_chunk = NULL; nents_first_chunk = 0; } ret = __sg_alloc_table(table, nents, SG_CHUNK_SIZE, first_chunk, nents_first_chunk, GFP_ATOMIC, sg_pool_alloc); if (unlikely(ret)) sg_free_table_chained(table, nents_first_chunk); return ret; } EXPORT_SYMBOL_GPL(sg_alloc_table_chained); static __init int sg_pool_init(void) { int i; for (i = 0; i < SG_MEMPOOL_NR; i++) { struct sg_pool *sgp = sg_pools + i; int size = sgp->size * sizeof(struct scatterlist); sgp->slab = kmem_cache_create(sgp->name, size, 0, SLAB_HWCACHE_ALIGN, NULL); if (!sgp->slab) { printk(KERN_ERR "SG_POOL: can't init sg slab %s\n", sgp->name); goto cleanup_sdb; } sgp->pool = mempool_create_slab_pool(SG_MEMPOOL_SIZE, sgp->slab); if (!sgp->pool) { printk(KERN_ERR "SG_POOL: can't init sg mempool %s\n", sgp->name); goto cleanup_sdb; } } return 0; cleanup_sdb: for (i = 0; i < SG_MEMPOOL_NR; i++) { struct sg_pool *sgp = sg_pools + i; mempool_destroy(sgp->pool); kmem_cache_destroy(sgp->slab); } return -ENOMEM; } static __exit void sg_pool_exit(void) { int i; for (i = 0; i < SG_MEMPOOL_NR; i++) { struct sg_pool *sgp = sg_pools + i; mempool_destroy(sgp->pool); kmem_cache_destroy(sgp->slab); } } module_init(sg_pool_init); module_exit(sg_pool_exit);
1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 /* * include/linux/topology.h * * Written by: Matthew Dobson, IBM Corporation * * Copyright (C) 2002, IBM Corp. * * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * Send feedback to <colpatch@us.ibm.com> */ #ifndef _LINUX_TOPOLOGY_H #define _LINUX_TOPOLOGY_H #include <linux/arch_topology.h> #include <linux/cpumask.h> #include <linux/bitops.h> #include <linux/mmzone.h> #include <linux/smp.h> #include <linux/percpu.h> #include <asm/topology.h> #ifndef nr_cpus_node #define nr_cpus_node(node) cpumask_weight(cpumask_of_node(node)) #endif #define for_each_node_with_cpus(node) \ for_each_online_node(node) \ if (nr_cpus_node(node)) int arch_update_cpu_topology(void); /* Conform to ACPI 2.0 SLIT distance definitions */ #define LOCAL_DISTANCE 10 #define REMOTE_DISTANCE 20 #ifndef node_distance #define node_distance(from,to) ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE) #endif #ifndef RECLAIM_DISTANCE /* * If the distance between nodes in a system is larger than RECLAIM_DISTANCE * (in whatever arch specific measurement units returned by node_distance()) * and node_reclaim_mode is enabled then the VM will only call node_reclaim() * on nodes within this distance. */ #define RECLAIM_DISTANCE 30 #endif /* * The following tunable allows platforms to override the default node * reclaim distance (RECLAIM_DISTANCE) if remote memory accesses are * sufficiently fast that the default value actually hurts * performance. * * AMD EPYC machines use this because even though the 2-hop distance * is 32 (3.2x slower than a local memory access) performance actually * *improves* if allowed to reclaim memory and load balance tasks * between NUMA nodes 2-hops apart. */ extern int __read_mostly node_reclaim_distance; #ifndef PENALTY_FOR_NODE_WITH_CPUS #define PENALTY_FOR_NODE_WITH_CPUS (1) #endif #ifdef CONFIG_USE_PERCPU_NUMA_NODE_ID DECLARE_PER_CPU(int, numa_node); #ifndef numa_node_id /* Returns the number of the current Node. */ static inline int numa_node_id(void) { return raw_cpu_read(numa_node); } #endif #ifndef cpu_to_node static inline int cpu_to_node(int cpu) { return per_cpu(numa_node, cpu); } #endif #ifndef set_numa_node static inline void set_numa_node(int node) { this_cpu_write(numa_node, node); } #endif #ifndef set_cpu_numa_node static inline void set_cpu_numa_node(int cpu, int node) { per_cpu(numa_node, cpu) = node; } #endif #else /* !CONFIG_USE_PERCPU_NUMA_NODE_ID */ /* Returns the number of the current Node. */ #ifndef numa_node_id static inline int numa_node_id(void) { return cpu_to_node(raw_smp_processor_id()); } #endif #endif /* [!]CONFIG_USE_PERCPU_NUMA_NODE_ID */ #ifdef CONFIG_HAVE_MEMORYLESS_NODES /* * N.B., Do NOT reference the '_numa_mem_' per cpu variable directly. * It will not be defined when CONFIG_HAVE_MEMORYLESS_NODES is not defined. * Use the accessor functions set_numa_mem(), numa_mem_id() and cpu_to_mem(). */ DECLARE_PER_CPU(int, _numa_mem_); #ifndef set_numa_mem static inline void set_numa_mem(int node) { this_cpu_write(_numa_mem_, node); } #endif #ifndef numa_mem_id /* Returns the number of the nearest Node with memory */ static inline int numa_mem_id(void) { return raw_cpu_read(_numa_mem_); } #endif #ifndef cpu_to_mem static inline int cpu_to_mem(int cpu) { return per_cpu(_numa_mem_, cpu); } #endif #ifndef set_cpu_numa_mem static inline void set_cpu_numa_mem(int cpu, int node) { per_cpu(_numa_mem_, cpu) = node; } #endif #else /* !CONFIG_HAVE_MEMORYLESS_NODES */ #ifndef numa_mem_id /* Returns the number of the nearest Node with memory */ static inline int numa_mem_id(void) { return numa_node_id(); } #endif #ifndef cpu_to_mem static inline int cpu_to_mem(int cpu) { return cpu_to_node(cpu); } #endif #endif /* [!]CONFIG_HAVE_MEMORYLESS_NODES */ #ifndef topology_physical_package_id #define topology_physical_package_id(cpu) ((void)(cpu), -1) #endif #ifndef topology_die_id #define topology_die_id(cpu) ((void)(cpu), -1) #endif #ifndef topology_core_id #define topology_core_id(cpu) ((void)(cpu), 0) #endif #ifndef topology_sibling_cpumask #define topology_sibling_cpumask(cpu) cpumask_of(cpu) #endif #ifndef topology_core_cpumask #define topology_core_cpumask(cpu) cpumask_of(cpu) #endif #ifndef topology_die_cpumask #define topology_die_cpumask(cpu) cpumask_of(cpu) #endif #if defined(CONFIG_SCHED_SMT) && !defined(cpu_smt_mask) static inline const struct cpumask *cpu_smt_mask(int cpu) { return topology_sibling_cpumask(cpu); } #endif static inline const struct cpumask *cpu_cpu_mask(int cpu) { return cpumask_of_node(cpu_to_node(cpu)); } #endif /* _LINUX_TOPOLOGY_H */
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_HIGHMEM_H #define _LINUX_HIGHMEM_H #include <linux/fs.h> #include <linux/kernel.h> #include <linux/bug.h> #include <linux/mm.h> #include <linux/uaccess.h> #include <linux/hardirq.h> #include <asm/cacheflush.h> #ifndef ARCH_HAS_FLUSH_ANON_PAGE static inline void flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr) { } #endif #ifndef ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE static inline void flush_kernel_dcache_page(struct page *page) { } static inline void flush_kernel_vmap_range(void *vaddr, int size) { } static inline void invalidate_kernel_vmap_range(void *vaddr, int size) { } #endif #include <asm/kmap_types.h> #ifdef CONFIG_HIGHMEM extern void *kmap_atomic_high_prot(struct page *page, pgprot_t prot); extern void kunmap_atomic_high(void *kvaddr); #include <asm/highmem.h> #ifndef ARCH_HAS_KMAP_FLUSH_TLB static inline void kmap_flush_tlb(unsigned long addr) { } #endif #ifndef kmap_prot #define kmap_prot PAGE_KERNEL #endif void *kmap_high(struct page *page); static inline void *kmap(struct page *page) { void *addr; might_sleep(); if (!PageHighMem(page)) addr = page_address(page); else addr = kmap_high(page); kmap_flush_tlb((unsigned long)addr); return addr; } void kunmap_high(struct page *page); static inline void kunmap(struct page *page) { might_sleep(); if (!PageHighMem(page)) return; kunmap_high(page); } /* * kmap_atomic/kunmap_atomic is significantly faster than kmap/kunmap because * no global lock is needed and because the kmap code must perform a global TLB * invalidation when the kmap pool wraps. * * However when holding an atomic kmap it is not legal to sleep, so atomic * kmaps are appropriate for short, tight code paths only. * * The use of kmap_atomic/kunmap_atomic is discouraged - kmap/kunmap * gives a more generic (and caching) interface. But kmap_atomic can * be used in IRQ contexts, so in some (very limited) cases we need * it. */ static inline void *kmap_atomic_prot(struct page *page, pgprot_t prot) { preempt_disable(); pagefault_disable(); if (!PageHighMem(page)) return page_address(page); return kmap_atomic_high_prot(page, prot); } #define kmap_atomic(page) kmap_atomic_prot(page, kmap_prot) /* declarations for linux/mm/highmem.c */ unsigned int nr_free_highpages(void); extern atomic_long_t _totalhigh_pages; static inline unsigned long totalhigh_pages(void) { return (unsigned long)atomic_long_read(&_totalhigh_pages); } static inline void totalhigh_pages_inc(void) { atomic_long_inc(&_totalhigh_pages); } static inline void totalhigh_pages_dec(void) { atomic_long_dec(&_totalhigh_pages); } static inline void totalhigh_pages_add(long count) { atomic_long_add(count, &_totalhigh_pages); } static inline void totalhigh_pages_set(long val) { atomic_long_set(&_totalhigh_pages, val); } void kmap_flush_unused(void); struct page *kmap_to_page(void *addr); #else /* CONFIG_HIGHMEM */ static inline unsigned int nr_free_highpages(void) { return 0; } static inline struct page *kmap_to_page(void *addr) { return virt_to_page(addr); } static inline unsigned long totalhigh_pages(void) { return 0UL; } static inline void *kmap(struct page *page) { might_sleep(); return page_address(page); } static inline void kunmap_high(struct page *page) { } static inline void kunmap(struct page *page) { #ifdef ARCH_HAS_FLUSH_ON_KUNMAP kunmap_flush_on_unmap(page_address(page)); #endif } static inline void *kmap_atomic(struct page *page) { preempt_disable(); pagefault_disable(); return page_address(page); } #define kmap_atomic_prot(page, prot) kmap_atomic(page) static inline void kunmap_atomic_high(void *addr) { /* * Mostly nothing to do in the CONFIG_HIGHMEM=n case as kunmap_atomic() * handles re-enabling faults + preemption */ #ifdef ARCH_HAS_FLUSH_ON_KUNMAP kunmap_flush_on_unmap(addr); #endif } #define kmap_atomic_pfn(pfn) kmap_atomic(pfn_to_page(pfn)) #define kmap_flush_unused() do {} while(0) #endif /* CONFIG_HIGHMEM */ #if defined(CONFIG_HIGHMEM) || defined(CONFIG_X86_32) DECLARE_PER_CPU(int, __kmap_atomic_idx); static inline int kmap_atomic_idx_push(void) { int idx = __this_cpu_inc_return(__kmap_atomic_idx) - 1; #ifdef CONFIG_DEBUG_HIGHMEM WARN_ON_ONCE(in_irq() && !irqs_disabled()); BUG_ON(idx >= KM_TYPE_NR); #endif return idx; } static inline int kmap_atomic_idx(void) { return __this_cpu_read(__kmap_atomic_idx) - 1; } static inline void kmap_atomic_idx_pop(void) { #ifdef CONFIG_DEBUG_HIGHMEM int idx = __this_cpu_dec_return(__kmap_atomic_idx); BUG_ON(idx < 0); #else __this_cpu_dec(__kmap_atomic_idx); #endif } #endif /* * Prevent people trying to call kunmap_atomic() as if it were kunmap() * kunmap_atomic() should get the return value of kmap_atomic, not the page. */ #define kunmap_atomic(addr) \ do { \ BUILD_BUG_ON(__same_type((addr), struct page *)); \ kunmap_atomic_high(addr); \ pagefault_enable(); \ preempt_enable(); \ } while (0) /* when CONFIG_HIGHMEM is not set these will be plain clear/copy_page */ #ifndef clear_user_highpage static inline void clear_user_highpage(struct page *page, unsigned long vaddr) { void *addr = kmap_atomic(page); clear_user_page(addr, vaddr, page); kunmap_atomic(addr); } #endif #ifndef __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE /** * __alloc_zeroed_user_highpage - Allocate a zeroed HIGHMEM page for a VMA with caller-specified movable GFP flags * @movableflags: The GFP flags related to the pages future ability to move like __GFP_MOVABLE * @vma: The VMA the page is to be allocated for * @vaddr: The virtual address the page will be inserted into * * This function will allocate a page for a VMA but the caller is expected * to specify via movableflags whether the page will be movable in the * future or not * * An architecture may override this function by defining * __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE and providing their own * implementation. */ static inline struct page * __alloc_zeroed_user_highpage(gfp_t movableflags, struct vm_area_struct *vma, unsigned long vaddr) { struct page *page = alloc_page_vma(GFP_HIGHUSER | movableflags, vma, vaddr); if (page) clear_user_highpage(page, vaddr); return page; } #endif /** * alloc_zeroed_user_highpage_movable - Allocate a zeroed HIGHMEM page for a VMA that the caller knows can move * @vma: The VMA the page is to be allocated for * @vaddr: The virtual address the page will be inserted into * * This function will allocate a page for a VMA that the caller knows will * be able to migrate in the future using move_pages() or reclaimed */ static inline struct page * alloc_zeroed_user_highpage_movable(struct vm_area_struct *vma, unsigned long vaddr) { return __alloc_zeroed_user_highpage(__GFP_MOVABLE, vma, vaddr); } static inline void clear_highpage(struct page *page) { void *kaddr = kmap_atomic(page); clear_page(kaddr); kunmap_atomic(kaddr); } static inline void zero_user_segments(struct page *page, unsigned start1, unsigned end1, unsigned start2, unsigned end2) { void *kaddr = kmap_atomic(page); BUG_ON(end1 > PAGE_SIZE || end2 > PAGE_SIZE); if (end1 > start1) memset(kaddr + start1, 0, end1 - start1); if (end2 > start2) memset(kaddr + start2, 0, end2 - start2); kunmap_atomic(kaddr); flush_dcache_page(page); } static inline void zero_user_segment(struct page *page, unsigned start, unsigned end) { zero_user_segments(page, start, end, 0, 0); } static inline void zero_user(struct page *page, unsigned start, unsigned size) { zero_user_segments(page, start, start + size, 0, 0); } #ifndef __HAVE_ARCH_COPY_USER_HIGHPAGE static inline void copy_user_highpage(struct page *to, struct page *from, unsigned long vaddr, struct vm_area_struct *vma) { char *vfrom, *vto; vfrom = kmap_atomic(from); vto = kmap_atomic(to); copy_user_page(vto, vfrom, vaddr, to); kunmap_atomic(vto); kunmap_atomic(vfrom); } #endif #ifndef __HAVE_ARCH_COPY_HIGHPAGE static inline void copy_highpage(struct page *to, struct page *from) { char *vfrom, *vto; vfrom = kmap_atomic(from); vto = kmap_atomic(to); copy_page(vto, vfrom); kunmap_atomic(vto); kunmap_atomic(vfrom); } #endif #endif /* _LINUX_HIGHMEM_H */
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 /* SPDX-License-Identifier: GPL-2.0-or-later */ /* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * Checksumming functions for IP, TCP, UDP and so on * * Authors: Jorge Cwik, <jorge@laser.satlink.net> * Arnt Gulbrandsen, <agulbra@nvg.unit.no> * Borrows very liberally from tcp.c and ip.c, see those * files for more names. */ #ifndef _CHECKSUM_H #define _CHECKSUM_H #include <linux/errno.h> #include <asm/types.h> #include <asm/byteorder.h> #include <linux/uaccess.h> #include <asm/checksum.h> #ifndef _HAVE_ARCH_COPY_AND_CSUM_FROM_USER static inline __wsum csum_and_copy_from_user (const void __user *src, void *dst, int len) { if (copy_from_user(dst, src, len)) return 0; return csum_partial(dst, len, ~0U); } #endif #ifndef HAVE_CSUM_COPY_USER static __inline__ __wsum csum_and_copy_to_user (const void *src, void __user *dst, int len) { __wsum sum = csum_partial(src, len, ~0U); if (copy_to_user(dst, src, len) == 0) return sum; return 0; } #endif #ifndef _HAVE_ARCH_CSUM_AND_COPY static inline __wsum csum_partial_copy_nocheck(const void *src, void *dst, int len) { memcpy(dst, src, len); return csum_partial(dst, len, 0); } #endif #ifndef HAVE_ARCH_CSUM_ADD static inline __wsum csum_add(__wsum csum, __wsum addend) { u32 res = (__force u32)csum; res += (__force u32)addend; return (__force __wsum)(res + (res < (__force u32)addend)); } #endif static inline __wsum csum_sub(__wsum csum, __wsum addend) { return csum_add(csum, ~addend); } static inline __sum16 csum16_add(__sum16 csum, __be16 addend) { u16 res = (__force u16)csum; res += (__force u16)addend; return (__force __sum16)(res + (res < (__force u16)addend)); } static inline __sum16 csum16_sub(__sum16 csum, __be16 addend) { return csum16_add(csum, ~addend); } static inline __wsum csum_block_add(__wsum csum, __wsum csum2, int offset) { u32 sum = (__force u32)csum2; /* rotate sum to align it with a 16b boundary */ if (offset & 1) sum = ror32(sum, 8); return csum_add(csum, (__force __wsum)sum); } static inline __wsum csum_block_add_ext(__wsum csum, __wsum csum2, int offset, int len) { return csum_block_add(csum, csum2, offset); } static inline __wsum csum_block_sub(__wsum csum, __wsum csum2, int offset) { return csum_block_add(csum, ~csum2, offset); } static inline __wsum csum_unfold(__sum16 n) { return (__force __wsum)n; } static inline __wsum csum_partial_ext(const void *buff, int len, __wsum sum) { return csum_partial(buff, len, sum); } #define CSUM_MANGLED_0 ((__force __sum16)0xffff) static inline void csum_replace_by_diff(__sum16 *sum, __wsum diff) { *sum = csum_fold(csum_add(diff, ~csum_unfold(*sum))); } static inline void csum_replace4(__sum16 *sum, __be32 from, __be32 to) { __wsum tmp = csum_sub(~csum_unfold(*sum), (__force __wsum)from); *sum = csum_fold(csum_add(tmp, (__force __wsum)to)); } /* Implements RFC 1624 (Incremental Internet Checksum) * 3. Discussion states : * HC' = ~(~HC + ~m + m') * m : old value of a 16bit field * m' : new value of a 16bit field */ static inline void csum_replace2(__sum16 *sum, __be16 old, __be16 new) { *sum = ~csum16_add(csum16_sub(~(*sum), old), new); } struct sk_buff; void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb, __be32 from, __be32 to, bool pseudohdr); void inet_proto_csum_replace16(__sum16 *sum, struct sk_buff *skb, const __be32 *from, const __be32 *to, bool pseudohdr); void inet_proto_csum_replace_by_diff(__sum16 *sum, struct sk_buff *skb, __wsum diff, bool pseudohdr); static inline void inet_proto_csum_replace2(__sum16 *sum, struct sk_buff *skb, __be16 from, __be16 to, bool pseudohdr) { inet_proto_csum_replace4(sum, skb, (__force __be32)from, (__force __be32)to, pseudohdr); } static inline __wsum remcsum_adjust(void *ptr, __wsum csum, int start, int offset) { __sum16 *psum = (__sum16 *)(ptr + offset); __wsum delta; /* Subtract out checksum up to start */ csum = csum_sub(csum, csum_partial(ptr, start, 0)); /* Set derived checksum in packet */ delta = csum_sub((__force __wsum)csum_fold(csum), (__force __wsum)*psum); *psum = csum_fold(csum); return delta; } static inline void remcsum_unadjust(__sum16 *psum, __wsum delta) { *psum = csum_fold(csum_sub(delta, (__force __wsum)*psum)); } #endif
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_SCHED_CLOCK_H #define _LINUX_SCHED_CLOCK_H #include <linux/smp.h> /* * Do not use outside of architecture code which knows its limitations. * * sched_clock() has no promise of monotonicity or bounded drift between * CPUs, use (which you should not) requires disabling IRQs. * * Please use one of the three interfaces below. */ extern unsigned long long notrace sched_clock(void); /* * See the comment in kernel/sched/clock.c */ extern u64 running_clock(void); extern u64 sched_clock_cpu(int cpu); extern void sched_clock_init(void); #ifndef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK static inline void sched_clock_tick(void) { } static inline void clear_sched_clock_stable(void) { } static inline void sched_clock_idle_sleep_event(void) { } static inline void sched_clock_idle_wakeup_event(void) { } static inline u64 cpu_clock(int cpu) { return sched_clock(); } static inline u64 local_clock(void) { return sched_clock(); } #else extern int sched_clock_stable(void); extern void clear_sched_clock_stable(void); /* * When sched_clock_stable(), __sched_clock_offset provides the offset * between local_clock() and sched_clock(). */ extern u64 __sched_clock_offset; extern void sched_clock_tick(void); extern void sched_clock_tick_stable(void); extern void sched_clock_idle_sleep_event(void); extern void sched_clock_idle_wakeup_event(void); /* * As outlined in clock.c, provides a fast, high resolution, nanosecond * time source that is monotonic per cpu argument and has bounded drift * between cpus. * * ######################### BIG FAT WARNING ########################## * # when comparing cpu_clock(i) to cpu_clock(j) for i != j, time can # * # go backwards !! # * #################################################################### */ static inline u64 cpu_clock(int cpu) { return sched_clock_cpu(cpu); } static inline u64 local_clock(void) { return sched_clock_cpu(raw_smp_processor_id()); } #endif #ifdef CONFIG_IRQ_TIME_ACCOUNTING /* * An i/f to runtime opt-in for irq time accounting based off of sched_clock. * The reason for this explicit opt-in is not to have perf penalty with * slow sched_clocks. */ extern void enable_sched_clock_irqtime(void); extern void disable_sched_clock_irqtime(void); #else static inline void enable_sched_clock_irqtime(void) {} static inline void disable_sched_clock_irqtime(void) {} #endif #endif /* _LINUX_SCHED_CLOCK_H */
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If these fields are 0, then either the mapping is shared, or * cgroup accounting is disabled for this resv_map. */ struct page_counter *reservation_counter; unsigned long pages_per_hpage; struct cgroup_subsys_state *css; #endif }; /* * Region tracking -- allows tracking of reservations and instantiated pages * across the pages in a mapping. * * The region data structures are embedded into a resv_map and protected * by a resv_map's lock. The set of regions within the resv_map represent * reservations for huge pages, or huge pages that have already been * instantiated within the map. The from and to elements are huge page * indicies into the associated mapping. from indicates the starting index * of the region. to represents the first index past the end of the region. * * For example, a file region structure with from == 0 and to == 4 represents * four huge pages in a mapping. It is important to note that the to element * represents the first element past the end of the region. This is used in * arithmetic as 4(to) - 0(from) = 4 huge pages in the region. * * Interval notation of the form [from, to) will be used to indicate that * the endpoint from is inclusive and to is exclusive. */ struct file_region { struct list_head link; long from; long to; #ifdef CONFIG_CGROUP_HUGETLB /* * On shared mappings, each reserved region appears as a struct * file_region in resv_map. These fields hold the info needed to * uncharge each reservation. */ struct page_counter *reservation_counter; struct cgroup_subsys_state *css; #endif }; extern struct resv_map *resv_map_alloc(void); void resv_map_release(struct kref *ref); extern spinlock_t hugetlb_lock; extern int hugetlb_max_hstate __read_mostly; #define for_each_hstate(h) \ for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++) struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages, long min_hpages); void hugepage_put_subpool(struct hugepage_subpool *spool); void reset_vma_resv_huge_pages(struct vm_area_struct *vma); int hugetlb_sysctl_handler(struct ctl_table *, int, void *, size_t *, loff_t *); int hugetlb_overcommit_handler(struct ctl_table *, int, void *, size_t *, loff_t *); int hugetlb_treat_movable_handler(struct ctl_table *, int, void *, size_t *, loff_t *); int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int, void *, size_t *, loff_t *); int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, unsigned long *, long, unsigned int, int *); void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long, struct page *); void __unmap_hugepage_range_final(struct mmu_gather *tlb, struct vm_area_struct *vma, unsigned long start, unsigned long end, struct page *ref_page); void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, unsigned long start, unsigned long end, struct page *ref_page); void hugetlb_report_meminfo(struct seq_file *); int hugetlb_report_node_meminfo(char *buf, int len, int nid); void hugetlb_show_meminfo(void); unsigned long hugetlb_total_pages(void); vm_fault_t hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, unsigned int flags); int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, pte_t *dst_pte, struct vm_area_struct *dst_vma, unsigned long dst_addr, unsigned long src_addr, struct page **pagep); int hugetlb_reserve_pages(struct inode *inode, long from, long to, struct vm_area_struct *vma, vm_flags_t vm_flags); long hugetlb_unreserve_pages(struct inode *inode, long start, long end, long freed); bool isolate_huge_page(struct page *page, struct list_head *list); void putback_active_hugepage(struct page *page); void move_hugetlb_state(struct page *oldpage, struct page *newpage, int reason); void free_huge_page(struct page *page); void hugetlb_fix_reserve_counts(struct inode *inode); extern struct mutex *hugetlb_fault_mutex_table; u32 hugetlb_fault_mutex_hash(struct address_space *mapping, pgoff_t idx); pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud); struct address_space *hugetlb_page_mapping_lock_write(struct page *hpage); extern int sysctl_hugetlb_shm_group; extern struct list_head huge_boot_pages; /* arch callbacks */ pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz); pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr, unsigned long sz); int huge_pmd_unshare(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long *addr, pte_t *ptep); void adjust_range_if_pmd_sharing_possible(struct vm_area_struct *vma, unsigned long *start, unsigned long *end); struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, int write); struct page *follow_huge_pd(struct vm_area_struct *vma, unsigned long address, hugepd_t hpd, int flags, int pdshift); struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, pmd_t *pmd, int flags); struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, pud_t *pud, int flags); struct page *follow_huge_pgd(struct mm_struct *mm, unsigned long address, pgd_t *pgd, int flags); int pmd_huge(pmd_t pmd); int pud_huge(pud_t pud); unsigned long hugetlb_change_protection(struct vm_area_struct *vma, unsigned long address, unsigned long end, pgprot_t newprot); bool is_hugetlb_entry_migration(pte_t pte); #else /* !CONFIG_HUGETLB_PAGE */ static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) { } static inline unsigned long hugetlb_total_pages(void) { return 0; } static inline struct address_space *hugetlb_page_mapping_lock_write( struct page *hpage) { return NULL; } static inline int huge_pmd_unshare(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long *addr, pte_t *ptep) { return 0; } static inline void adjust_range_if_pmd_sharing_possible( struct vm_area_struct *vma, unsigned long *start, unsigned long *end) { } static inline long follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma, struct page **pages, struct vm_area_struct **vmas, unsigned long *position, unsigned long *nr_pages, long i, unsigned int flags, int *nonblocking) { BUG(); return 0; } static inline struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, int write) { return ERR_PTR(-EINVAL); } static inline int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src, struct vm_area_struct *vma) { BUG(); return 0; } static inline void hugetlb_report_meminfo(struct seq_file *m) { } static inline int hugetlb_report_node_meminfo(char *buf, int len, int nid) { return 0; } static inline void hugetlb_show_meminfo(void) { } static inline struct page *follow_huge_pd(struct vm_area_struct *vma, unsigned long address, hugepd_t hpd, int flags, int pdshift) { return NULL; } static inline struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, pmd_t *pmd, int flags) { return NULL; } static inline struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, pud_t *pud, int flags) { return NULL; } static inline struct page *follow_huge_pgd(struct mm_struct *mm, unsigned long address, pgd_t *pgd, int flags) { return NULL; } static inline int prepare_hugepage_range(struct file *file, unsigned long addr, unsigned long len) { return -EINVAL; } static inline int pmd_huge(pmd_t pmd) { return 0; } static inline int pud_huge(pud_t pud) { return 0; } static inline int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr, unsigned long len) { return 0; } static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr, unsigned long end, unsigned long floor, unsigned long ceiling) { BUG(); } static inline int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, pte_t *dst_pte, struct vm_area_struct *dst_vma, unsigned long dst_addr, unsigned long src_addr, struct page **pagep) { BUG(); return 0; } static inline pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr, unsigned long sz) { return NULL; } static inline bool isolate_huge_page(struct page *page, struct list_head *list) { return false; } static inline void putback_active_hugepage(struct page *page) { } static inline void move_hugetlb_state(struct page *oldpage, struct page *newpage, int reason) { } static inline unsigned long hugetlb_change_protection( struct vm_area_struct *vma, unsigned long address, unsigned long end, pgprot_t newprot) { return 0; } static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb, struct vm_area_struct *vma, unsigned long start, unsigned long end, struct page *ref_page) { BUG(); } static inline void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, unsigned long start, unsigned long end, struct page *ref_page) { BUG(); } static inline vm_fault_t hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, unsigned int flags) { BUG(); return 0; } #endif /* !CONFIG_HUGETLB_PAGE */ /* * hugepages at page global directory. If arch support * hugepages at pgd level, they need to define this. */ #ifndef pgd_huge #define pgd_huge(x) 0 #endif #ifndef p4d_huge #define p4d_huge(x) 0 #endif #ifndef pgd_write static inline int pgd_write(pgd_t pgd) { BUG(); return 0; } #endif #define HUGETLB_ANON_FILE "anon_hugepage" enum { /* * The file will be used as an shm file so shmfs accounting rules * apply */ HUGETLB_SHMFS_INODE = 1, /* * The file is being created on the internal vfs mount and shmfs * accounting rules do not apply */ HUGETLB_ANONHUGE_INODE = 2, }; #ifdef CONFIG_HUGETLBFS struct hugetlbfs_sb_info { long max_inodes; /* inodes allowed */ long free_inodes; /* inodes free */ spinlock_t stat_lock; struct hstate *hstate; struct hugepage_subpool *spool; kuid_t uid; kgid_t gid; umode_t mode; }; static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) { return sb->s_fs_info; } struct hugetlbfs_inode_info { struct shared_policy policy; struct inode vfs_inode; unsigned int seals; }; static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) { return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); } extern const struct file_operations hugetlbfs_file_operations; extern const struct vm_operations_struct hugetlb_vm_ops; struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct, struct user_struct **user, int creat_flags, int page_size_log); static inline bool is_file_hugepages(struct file *file) { if (file->f_op == &hugetlbfs_file_operations) return true; return is_file_shm_hugepages(file); } static inline struct hstate *hstate_inode(struct inode *i) { return HUGETLBFS_SB(i->i_sb)->hstate; } #else /* !CONFIG_HUGETLBFS */ #define is_file_hugepages(file) false static inline struct file * hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag, struct user_struct **user, int creat_flags, int page_size_log) { return ERR_PTR(-ENOSYS); } static inline struct hstate *hstate_inode(struct inode *i) { return NULL; } #endif /* !CONFIG_HUGETLBFS */ #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags); #endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */ #ifdef CONFIG_HUGETLB_PAGE #define HSTATE_NAME_LEN 32 /* Defines one hugetlb page size */ struct hstate { int next_nid_to_alloc; int next_nid_to_free; unsigned int order; unsigned long mask; unsigned long max_huge_pages; unsigned long nr_huge_pages; unsigned long free_huge_pages; unsigned long resv_huge_pages; unsigned long surplus_huge_pages; unsigned long nr_overcommit_huge_pages; struct list_head hugepage_activelist; struct list_head hugepage_freelists[MAX_NUMNODES]; unsigned int nr_huge_pages_node[MAX_NUMNODES]; unsigned int free_huge_pages_node[MAX_NUMNODES]; unsigned int surplus_huge_pages_node[MAX_NUMNODES]; #ifdef CONFIG_CGROUP_HUGETLB /* cgroup control files */ struct cftype cgroup_files_dfl[7]; struct cftype cgroup_files_legacy[9]; #endif char name[HSTATE_NAME_LEN]; }; struct huge_bootmem_page { struct list_head list; struct hstate *hstate; }; struct page *alloc_huge_page(struct vm_area_struct *vma, unsigned long addr, int avoid_reserve); struct page *alloc_huge_page_nodemask(struct hstate *h, int preferred_nid, nodemask_t *nmask, gfp_t gfp_mask); struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma, unsigned long address); int huge_add_to_page_cache(struct page *page, struct address_space *mapping, pgoff_t idx); /* arch callback */ int __init __alloc_bootmem_huge_page(struct hstate *h); int __init alloc_bootmem_huge_page(struct hstate *h); void __init hugetlb_add_hstate(unsigned order); bool __init arch_hugetlb_valid_size(unsigned long size); struct hstate *size_to_hstate(unsigned long size); #ifndef HUGE_MAX_HSTATE #define HUGE_MAX_HSTATE 1 #endif extern struct hstate hstates[HUGE_MAX_HSTATE]; extern unsigned int default_hstate_idx; #define default_hstate (hstates[default_hstate_idx]) static inline struct hstate *hstate_file(struct file *f) { return hstate_inode(file_inode(f)); } static inline struct hstate *hstate_sizelog(int page_size_log) { if (!page_size_log) return &default_hstate; return size_to_hstate(1UL << page_size_log); } static inline struct hstate *hstate_vma(struct vm_area_struct *vma) { return hstate_file(vma->vm_file); } static inline unsigned long huge_page_size(struct hstate *h) { return (unsigned long)PAGE_SIZE << h->order; } extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma); extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma); static inline unsigned long huge_page_mask(struct hstate *h) { return h->mask; } static inline unsigned int huge_page_order(struct hstate *h) { return h->order; } static inline unsigned huge_page_shift(struct hstate *h) { return h->order + PAGE_SHIFT; } static inline bool hstate_is_gigantic(struct hstate *h) { return huge_page_order(h) >= MAX_ORDER; } static inline unsigned int pages_per_huge_page(struct hstate *h) { return 1 << h->order; } static inline unsigned int blocks_per_huge_page(struct hstate *h) { return huge_page_size(h) / 512; } #include <asm/hugetlb.h> #ifndef is_hugepage_only_range static inline int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr, unsigned long len) { return 0; } #define is_hugepage_only_range is_hugepage_only_range #endif #ifndef arch_clear_hugepage_flags static inline void arch_clear_hugepage_flags(struct page *page) { } #define arch_clear_hugepage_flags arch_clear_hugepage_flags #endif #ifndef arch_make_huge_pte static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, struct page *page, int writable) { return entry; } #endif static inline struct hstate *page_hstate(struct page *page) { VM_BUG_ON_PAGE(!PageHuge(page), page); return size_to_hstate(page_size(page)); } static inline unsigned hstate_index_to_shift(unsigned index) { return hstates[index].order + PAGE_SHIFT; } static inline int hstate_index(struct hstate *h) { return h - hstates; } extern int dissolve_free_huge_page(struct page *page); extern int dissolve_free_huge_pages(unsigned long start_pfn, unsigned long end_pfn); #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION #ifndef arch_hugetlb_migration_supported static inline bool arch_hugetlb_migration_supported(struct hstate *h) { if ((huge_page_shift(h) == PMD_SHIFT) || (huge_page_shift(h) == PUD_SHIFT) || (huge_page_shift(h) == PGDIR_SHIFT)) return true; else return false; } #endif #else static inline bool arch_hugetlb_migration_supported(struct hstate *h) { return false; } #endif static inline bool hugepage_migration_supported(struct hstate *h) { return arch_hugetlb_migration_supported(h); } /* * Movability check is different as compared to migration check. * It determines whether or not a huge page should be placed on * movable zone or not. Movability of any huge page should be * required only if huge page size is supported for migration. * There wont be any reason for the huge page to be movable if * it is not migratable to start with. Also the size of the huge * page should be large enough to be placed under a movable zone * and still feasible enough to be migratable. Just the presence * in movable zone does not make the migration feasible. * * So even though large huge page sizes like the gigantic ones * are migratable they should not be movable because its not * feasible to migrate them from movable zone. */ static inline bool hugepage_movable_supported(struct hstate *h) { if (!hugepage_migration_supported(h)) return false; if (hstate_is_gigantic(h)) return false; return true; } /* Movability of hugepages depends on migration support. */ static inline gfp_t htlb_alloc_mask(struct hstate *h) { if (hugepage_movable_supported(h)) return GFP_HIGHUSER_MOVABLE; else return GFP_HIGHUSER; } static inline gfp_t htlb_modify_alloc_mask(struct hstate *h, gfp_t gfp_mask) { gfp_t modified_mask = htlb_alloc_mask(h); /* Some callers might want to enforce node */ modified_mask |= (gfp_mask & __GFP_THISNODE); modified_mask |= (gfp_mask & __GFP_NOWARN); return modified_mask; } static inline spinlock_t *huge_pte_lockptr(struct hstate *h, struct mm_struct *mm, pte_t *pte) { if (huge_page_size(h) == PMD_SIZE) return pmd_lockptr(mm, (pmd_t *) pte); VM_BUG_ON(huge_page_size(h) == PAGE_SIZE); return &mm->page_table_lock; } #ifndef hugepages_supported /* * Some platform decide whether they support huge pages at boot * time. Some of them, such as powerpc, set HPAGE_SHIFT to 0 * when there is no such support */ #define hugepages_supported() (HPAGE_SHIFT != 0) #endif void hugetlb_report_usage(struct seq_file *m, struct mm_struct *mm); static inline void hugetlb_count_init(struct mm_struct *mm) { atomic_long_set(&mm->hugetlb_usage, 0); } static inline void hugetlb_count_add(long l, struct mm_struct *mm) { atomic_long_add(l, &mm->hugetlb_usage); } static inline void hugetlb_count_sub(long l, struct mm_struct *mm) { atomic_long_sub(l, &mm->hugetlb_usage); } #ifndef set_huge_swap_pte_at static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte, unsigned long sz) { set_huge_pte_at(mm, addr, ptep, pte); } #endif #ifndef huge_ptep_modify_prot_start #define huge_ptep_modify_prot_start huge_ptep_modify_prot_start static inline pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) { return huge_ptep_get_and_clear(vma->vm_mm, addr, ptep); } #endif #ifndef huge_ptep_modify_prot_commit #define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit static inline void huge_ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, pte_t old_pte, pte_t pte) { set_huge_pte_at(vma->vm_mm, addr, ptep, pte); } #endif void set_page_huge_active(struct page *page); #else /* CONFIG_HUGETLB_PAGE */ struct hstate {}; static inline struct page *alloc_huge_page(struct vm_area_struct *vma, unsigned long addr, int avoid_reserve) { return NULL; } static inline struct page * alloc_huge_page_nodemask(struct hstate *h, int preferred_nid, nodemask_t *nmask, gfp_t gfp_mask) { return NULL; } static inline struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma, unsigned long address) { return NULL; } static inline int __alloc_bootmem_huge_page(struct hstate *h) { return 0; } static inline struct hstate *hstate_file(struct file *f) { return NULL; } static inline struct hstate *hstate_sizelog(int page_size_log) { return NULL; } static inline struct hstate *hstate_vma(struct vm_area_struct *vma) { return NULL; } static inline struct hstate *page_hstate(struct page *page) { return NULL; } static inline unsigned long huge_page_size(struct hstate *h) { return PAGE_SIZE; } static inline unsigned long huge_page_mask(struct hstate *h) { return PAGE_MASK; } static inline unsigned long vma_kernel_pagesize(struct vm_area_struct *vma) { return PAGE_SIZE; } static inline unsigned long vma_mmu_pagesize(struct vm_area_struct *vma) { return PAGE_SIZE; } static inline unsigned int huge_page_order(struct hstate *h) { return 0; } static inline unsigned int huge_page_shift(struct hstate *h) { return PAGE_SHIFT; } static inline bool hstate_is_gigantic(struct hstate *h) { return false; } static inline unsigned int pages_per_huge_page(struct hstate *h) { return 1; } static inline unsigned hstate_index_to_shift(unsigned index) { return 0; } static inline int hstate_index(struct hstate *h) { return 0; } static inline int dissolve_free_huge_page(struct page *page) { return 0; } static inline int dissolve_free_huge_pages(unsigned long start_pfn, unsigned long end_pfn) { return 0; } static inline bool hugepage_migration_supported(struct hstate *h) { return false; } static inline bool hugepage_movable_supported(struct hstate *h) { return false; } static inline gfp_t htlb_alloc_mask(struct hstate *h) { return 0; } static inline gfp_t htlb_modify_alloc_mask(struct hstate *h, gfp_t gfp_mask) { return 0; } static inline spinlock_t *huge_pte_lockptr(struct hstate *h, struct mm_struct *mm, pte_t *pte) { return &mm->page_table_lock; } static inline void hugetlb_count_init(struct mm_struct *mm) { } static inline void hugetlb_report_usage(struct seq_file *f, struct mm_struct *m) { } static inline void hugetlb_count_sub(long l, struct mm_struct *mm) { } static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte, unsigned long sz) { } #endif /* CONFIG_HUGETLB_PAGE */ static inline spinlock_t *huge_pte_lock(struct hstate *h, struct mm_struct *mm, pte_t *pte) { spinlock_t *ptl; ptl = huge_pte_lockptr(h, mm, pte); spin_lock(ptl); return ptl; } #if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_CMA) extern void __init hugetlb_cma_reserve(int order); extern void __init hugetlb_cma_check(void); #else static inline __init void hugetlb_cma_reserve(int order) { } static inline __init void hugetlb_cma_check(void) { } #endif #endif /* _LINUX_HUGETLB_H */
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 // SPDX-License-Identifier: GPL-2.0 /* * Functions related to mapping data to requests */ #include <linux/kernel.h> #include <linux/sched/task_stack.h> #include <linux/module.h> #include <linux/bio.h> #include <linux/blkdev.h> #include <linux/uio.h> #include "blk.h" struct bio_map_data { bool is_our_pages : 1; bool is_null_mapped : 1; struct iov_iter iter; struct iovec iov[]; }; static struct bio_map_data *bio_alloc_map_data(struct iov_iter *data, gfp_t gfp_mask) { struct bio_map_data *bmd; if (data->nr_segs > UIO_MAXIOV) return NULL; bmd = kmalloc(struct_size(bmd, iov, data->nr_segs), gfp_mask); if (!bmd) return NULL; memcpy(bmd->iov, data->iov, sizeof(struct iovec) * data->nr_segs); bmd->iter = *data; bmd->iter.iov = bmd->iov; return bmd; } /** * bio_copy_from_iter - copy all pages from iov_iter to bio * @bio: The &struct bio which describes the I/O as destination * @iter: iov_iter as source * * Copy all pages from iov_iter to bio. * Returns 0 on success, or error on failure. */ static int bio_copy_from_iter(struct bio *bio, struct iov_iter *iter) { struct bio_vec *bvec; struct bvec_iter_all iter_all; bio_for_each_segment_all(bvec, bio, iter_all) { ssize_t ret; ret = copy_page_from_iter(bvec->bv_page, bvec->bv_offset, bvec->bv_len, iter); if (!iov_iter_count(iter)) break; if (ret < bvec->bv_len) return -EFAULT; } return 0; } /** * bio_copy_to_iter - copy all pages from bio to iov_iter * @bio: The &struct bio which describes the I/O as source * @iter: iov_iter as destination * * Copy all pages from bio to iov_iter. * Returns 0 on success, or error on failure. */ static int bio_copy_to_iter(struct bio *bio, struct iov_iter iter) { struct bio_vec *bvec; struct bvec_iter_all iter_all; bio_for_each_segment_all(bvec, bio, iter_all) { ssize_t ret; ret = copy_page_to_iter(bvec->bv_page, bvec->bv_offset, bvec->bv_len, &iter); if (!iov_iter_count(&iter)) break; if (ret < bvec->bv_len) return -EFAULT; } return 0; } /** * bio_uncopy_user - finish previously mapped bio * @bio: bio being terminated * * Free pages allocated from bio_copy_user_iov() and write back data * to user space in case of a read. */ static int bio_uncopy_user(struct bio *bio) { struct bio_map_data *bmd = bio->bi_private; int ret = 0; if (!bmd->is_null_mapped) { /* * if we're in a workqueue, the request is orphaned, so * don't copy into a random user address space, just free * and return -EINTR so user space doesn't expect any data. */ if (!current->mm) ret = -EINTR; else if (bio_data_dir(bio) == READ) ret = bio_copy_to_iter(bio, bmd->iter); if (bmd->is_our_pages) bio_free_pages(bio); } kfree(bmd); bio_put(bio); return ret; } static int bio_copy_user_iov(struct request *rq, struct rq_map_data *map_data, struct iov_iter *iter, gfp_t gfp_mask) { struct bio_map_data *bmd; struct page *page; struct bio *bio, *bounce_bio; int i = 0, ret; int nr_pages; unsigned int len = iter->count; unsigned int offset = map_data ? offset_in_page(map_data->offset) : 0; bmd = bio_alloc_map_data(iter, gfp_mask); if (!bmd) return -ENOMEM; /* * We need to do a deep copy of the iov_iter including the iovecs. * The caller provided iov might point to an on-stack or otherwise * shortlived one. */ bmd->is_our_pages = !map_data; bmd->is_null_mapped = (map_data && map_data->null_mapped); nr_pages = DIV_ROUND_UP(offset + len, PAGE_SIZE); if (nr_pages > BIO_MAX_PAGES) nr_pages = BIO_MAX_PAGES; ret = -ENOMEM; bio = bio_kmalloc(gfp_mask, nr_pages); if (!bio) goto out_bmd; bio->bi_opf |= req_op(rq); if (map_data) { nr_pages = 1 << map_data->page_order; i = map_data->offset / PAGE_SIZE; } while (len) { unsigned int bytes = PAGE_SIZE; bytes -= offset; if (bytes > len) bytes = len; if (map_data) { if (i == map_data->nr_entries * nr_pages) { ret = -ENOMEM; goto cleanup; } page = map_data->pages[i / nr_pages]; page += (i % nr_pages); i++; } else { page = alloc_page(rq->q->bounce_gfp | gfp_mask); if (!page) { ret = -ENOMEM; goto cleanup; } } if (bio_add_pc_page(rq->q, bio, page, bytes, offset) < bytes) { if (!map_data) __free_page(page); break; } len -= bytes; offset = 0; } if (map_data) map_data->offset += bio->bi_iter.bi_size; /* * success */ if ((iov_iter_rw(iter) == WRITE && (!map_data || !map_data->null_mapped)) || (map_data && map_data->from_user)) { ret = bio_copy_from_iter(bio, iter); if (ret) goto cleanup; } else { if (bmd->is_our_pages) zero_fill_bio(bio); iov_iter_advance(iter, bio->bi_iter.bi_size); } bio->bi_private = bmd; bounce_bio = bio; ret = blk_rq_append_bio(rq, &bounce_bio); if (ret) goto cleanup; /* * We link the bounce buffer in and could have to traverse it later, so * we have to get a ref to prevent it from being freed */ bio_get(bounce_bio); return 0; cleanup: if (!map_data) bio_free_pages(bio); bio_put(bio); out_bmd: kfree(bmd); return ret; } static int bio_map_user_iov(struct request *rq, struct iov_iter *iter, gfp_t gfp_mask) { unsigned int max_sectors = queue_max_hw_sectors(rq->q); struct bio *bio, *bounce_bio; int ret; int j; if (!iov_iter_count(iter)) return -EINVAL; bio = bio_kmalloc(gfp_mask, iov_iter_npages(iter, BIO_MAX_PAGES)); if (!bio) return -ENOMEM; bio->bi_opf |= req_op(rq); while (iov_iter_count(iter)) { struct page **pages; ssize_t bytes; size_t offs, added = 0; int npages; bytes = iov_iter_get_pages_alloc(iter, &pages, LONG_MAX, &offs); if (unlikely(bytes <= 0)) { ret = bytes ? bytes : -EFAULT; goto out_unmap; } npages = DIV_ROUND_UP(offs + bytes, PAGE_SIZE); if (unlikely(offs & queue_dma_alignment(rq->q))) { ret = -EINVAL; j = 0; } else { for (j = 0; j < npages; j++) { struct page *page = pages[j]; unsigned int n = PAGE_SIZE - offs; bool same_page = false; if (n > bytes) n = bytes; if (!bio_add_hw_page(rq->q, bio, page, n, offs, max_sectors, &same_page)) { if (same_page) put_page(page); break; } added += n; bytes -= n; offs = 0; } iov_iter_advance(iter, added); } /* * release the pages we didn't map into the bio, if any */ while (j < npages) put_page(pages[j++]); kvfree(pages); /* couldn't stuff something into bio? */ if (bytes) break; } /* * Subtle: if we end up needing to bounce a bio, it would normally * disappear when its bi_end_io is run. However, we need the original * bio for the unmap, so grab an extra reference to it */ bio_get(bio); bounce_bio = bio; ret = blk_rq_append_bio(rq, &bounce_bio); if (ret) goto out_put_orig; /* * We link the bounce buffer in and could have to traverse it * later, so we have to get a ref to prevent it from being freed */ bio_get(bounce_bio); return 0; out_put_orig: bio_put(bio); out_unmap: bio_release_pages(bio, false); bio_put(bio); return ret; } /** * bio_unmap_user - unmap a bio * @bio: the bio being unmapped * * Unmap a bio previously mapped by bio_map_user_iov(). Must be called from * process context. * * bio_unmap_user() may sleep. */ static void bio_unmap_user(struct bio *bio) { bio_release_pages(bio, bio_data_dir(bio) == READ); bio_put(bio); bio_put(bio); } static void bio_invalidate_vmalloc_pages(struct bio *bio) { #ifdef ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE if (bio->bi_private && !op_is_write(bio_op(bio))) { unsigned long i, len = 0; for (i = 0; i < bio->bi_vcnt; i++) len += bio->bi_io_vec[i].bv_len; invalidate_kernel_vmap_range(bio->bi_private, len); } #endif } static void bio_map_kern_endio(struct bio *bio) { bio_invalidate_vmalloc_pages(bio); bio_put(bio); } /** * bio_map_kern - map kernel address into bio * @q: the struct request_queue for the bio * @data: pointer to buffer to map * @len: length in bytes * @gfp_mask: allocation flags for bio allocation * * Map the kernel address into a bio suitable for io to a block * device. Returns an error pointer in case of error. */ static struct bio *bio_map_kern(struct request_queue *q, void *data, unsigned int len, gfp_t gfp_mask) { unsigned long kaddr = (unsigned long)data; unsigned long end = (kaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT; unsigned long start = kaddr >> PAGE_SHIFT; const int nr_pages = end - start; bool is_vmalloc = is_vmalloc_addr(data); struct page *page; int offset, i; struct bio *bio; bio = bio_kmalloc(gfp_mask, nr_pages); if (!bio) return ERR_PTR(-ENOMEM); if (is_vmalloc) { flush_kernel_vmap_range(data, len); bio->bi_private = data; } offset = offset_in_page(kaddr); for (i = 0; i < nr_pages; i++) { unsigned int bytes = PAGE_SIZE - offset; if (len <= 0) break; if (bytes > len) bytes = len; if (!is_vmalloc) page = virt_to_page(data); else page = vmalloc_to_page(data); if (bio_add_pc_page(q, bio, page, bytes, offset) < bytes) { /* we don't support partial mappings */ bio_put(bio); return ERR_PTR(-EINVAL); } data += bytes; len -= bytes; offset = 0; } bio->bi_end_io = bio_map_kern_endio; return bio; } static void bio_copy_kern_endio(struct bio *bio) { bio_free_pages(bio); bio_put(bio); } static void bio_copy_kern_endio_read(struct bio *bio) { char *p = bio->bi_private; struct bio_vec *bvec; struct bvec_iter_all iter_all; bio_for_each_segment_all(bvec, bio, iter_all) { memcpy(p, page_address(bvec->bv_page), bvec->bv_len); p += bvec->bv_len; } bio_copy_kern_endio(bio); } /** * bio_copy_kern - copy kernel address into bio * @q: the struct request_queue for the bio * @data: pointer to buffer to copy * @len: length in bytes * @gfp_mask: allocation flags for bio and page allocation * @reading: data direction is READ * * copy the kernel address into a bio suitable for io to a block * device. Returns an error pointer in case of error. */ static struct bio *bio_copy_kern(struct request_queue *q, void *data, unsigned int len, gfp_t gfp_mask, int reading) { unsigned long kaddr = (unsigned long)data; unsigned long end = (kaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT; unsigned long start = kaddr >> PAGE_SHIFT; struct bio *bio; void *p = data; int nr_pages = 0; /* * Overflow, abort */ if (end < start) return ERR_PTR(-EINVAL); nr_pages = end - start; bio = bio_kmalloc(gfp_mask, nr_pages); if (!bio) return ERR_PTR(-ENOMEM); while (len) { struct page *page; unsigned int bytes = PAGE_SIZE; if (bytes > len) bytes = len; page = alloc_page(q->bounce_gfp | gfp_mask); if (!page) goto cleanup; if (!reading) memcpy(page_address(page), p, bytes); if (bio_add_pc_page(q, bio, page, bytes, 0) < bytes) break; len -= bytes; p += bytes; } if (reading) { bio->bi_end_io = bio_copy_kern_endio_read; bio->bi_private = data; } else { bio->bi_end_io = bio_copy_kern_endio; } return bio; cleanup: bio_free_pages(bio); bio_put(bio); return ERR_PTR(-ENOMEM); } /* * Append a bio to a passthrough request. Only works if the bio can be merged * into the request based on the driver constraints. */ int blk_rq_append_bio(struct request *rq, struct bio **bio) { struct bio *orig_bio = *bio; struct bvec_iter iter; struct bio_vec bv; unsigned int nr_segs = 0; blk_queue_bounce(rq->q, bio); bio_for_each_bvec(bv, *bio, iter) nr_segs++; if (!rq->bio) { blk_rq_bio_prep(rq, *bio, nr_segs); } else { if (!ll_back_merge_fn(rq, *bio, nr_segs)) { if (orig_bio != *bio) { bio_put(*bio); *bio = orig_bio; } return -EINVAL; } rq->biotail->bi_next = *bio; rq->biotail = *bio; rq->__data_len += (*bio)->bi_iter.bi_size; bio_crypt_free_ctx(*bio); } return 0; } EXPORT_SYMBOL(blk_rq_append_bio); /** * blk_rq_map_user_iov - map user data to a request, for passthrough requests * @q: request queue where request should be inserted * @rq: request to map data to * @map_data: pointer to the rq_map_data holding pages (if necessary) * @iter: iovec iterator * @gfp_mask: memory allocation flags * * Description: * Data will be mapped directly for zero copy I/O, if possible. Otherwise * a kernel bounce buffer is used. * * A matching blk_rq_unmap_user() must be issued at the end of I/O, while * still in process context. * * Note: The mapped bio may need to be bounced through blk_queue_bounce() * before being submitted to the device, as pages mapped may be out of * reach. It's the callers responsibility to make sure this happens. The * original bio must be passed back in to blk_rq_unmap_user() for proper * unmapping. */ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq, struct rq_map_data *map_data, const struct iov_iter *iter, gfp_t gfp_mask) { bool copy = false; unsigned long align = q->dma_pad_mask | queue_dma_alignment(q); struct bio *bio = NULL; struct iov_iter i; int ret = -EINVAL; if (!iter_is_iovec(iter)) goto fail; if (map_data) copy = true; else if (iov_iter_alignment(iter) & align) copy = true; else if (queue_virt_boundary(q)) copy = queue_virt_boundary(q) & iov_iter_gap_alignment(iter); i = *iter; do { if (copy) ret = bio_copy_user_iov(rq, map_data, &i, gfp_mask); else ret = bio_map_user_iov(rq, &i, gfp_mask); if (ret) goto unmap_rq; if (!bio) bio = rq->bio; } while (iov_iter_count(&i)); return 0; unmap_rq: blk_rq_unmap_user(bio); fail: rq->bio = NULL; return ret; } EXPORT_SYMBOL(blk_rq_map_user_iov); int blk_rq_map_user(struct request_queue *q, struct request *rq, struct rq_map_data *map_data, void __user *ubuf, unsigned long len, gfp_t gfp_mask) { struct iovec iov; struct iov_iter i; int ret = import_single_range(rq_data_dir(rq), ubuf, len, &iov, &i); if (unlikely(ret < 0)) return ret; return blk_rq_map_user_iov(q, rq, map_data, &i, gfp_mask); } EXPORT_SYMBOL(blk_rq_map_user); /** * blk_rq_unmap_user - unmap a request with user data * @bio: start of bio list * * Description: * Unmap a rq previously mapped by blk_rq_map_user(). The caller must * supply the original rq->bio from the blk_rq_map_user() return, since * the I/O completion may have changed rq->bio. */ int blk_rq_unmap_user(struct bio *bio) { struct bio *mapped_bio; int ret = 0, ret2; while (bio) { mapped_bio = bio; if (unlikely(bio_flagged(bio, BIO_BOUNCED))) mapped_bio = bio->bi_private; if (bio->bi_private) { ret2 = bio_uncopy_user(mapped_bio); if (ret2 && !ret) ret = ret2; } else { bio_unmap_user(mapped_bio); } mapped_bio = bio; bio = bio->bi_next; bio_put(mapped_bio); } return ret; } EXPORT_SYMBOL(blk_rq_unmap_user); /** * blk_rq_map_kern - map kernel data to a request, for passthrough requests * @q: request queue where request should be inserted * @rq: request to fill * @kbuf: the kernel buffer * @len: length of user data * @gfp_mask: memory allocation flags * * Description: * Data will be mapped directly if possible. Otherwise a bounce * buffer is used. Can be called multiple times to append multiple * buffers. */ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf, unsigned int len, gfp_t gfp_mask) { int reading = rq_data_dir(rq) == READ; unsigned long addr = (unsigned long) kbuf; struct bio *bio, *orig_bio; int ret; if (len > (queue_max_hw_sectors(q) << 9)) return -EINVAL; if (!len || !kbuf) return -EINVAL; if (!blk_rq_aligned(q, addr, len) || object_is_on_stack(kbuf)) bio = bio_copy_kern(q, kbuf, len, gfp_mask, reading); else bio = bio_map_kern(q, kbuf, len, gfp_mask); if (IS_ERR(bio)) return PTR_ERR(bio); bio->bi_opf &= ~REQ_OP_MASK; bio->bi_opf |= req_op(rq); orig_bio = bio; ret = blk_rq_append_bio(rq, &bio); if (unlikely(ret)) { /* request is too big */ bio_put(orig_bio); return ret; } return 0; } EXPORT_SYMBOL(blk_rq_map_kern);
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8022 8023 8024 8025 8026 8027 8028 /* SPDX-License-Identifier: GPL-2.0-only */ #ifndef __NET_CFG80211_H #define __NET_CFG80211_H /* * 802.11 device and configuration interface * * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> * Copyright 2013-2014 Intel Mobile Communications GmbH * Copyright 2015-2017 Intel Deutschland GmbH * Copyright (C) 2018-2020 Intel Corporation */ #include <linux/netdevice.h> #include <linux/debugfs.h> #include <linux/list.h> #include <linux/bug.h> #include <linux/netlink.h> #include <linux/skbuff.h> #include <linux/nl80211.h> #include <linux/if_ether.h> #include <linux/ieee80211.h> #include <linux/net.h> #include <net/regulatory.h> /** * DOC: Introduction * * cfg80211 is the configuration API for 802.11 devices in Linux. It bridges * userspace and drivers, and offers some utility functionality associated * with 802.11. cfg80211 must, directly or indirectly via mac80211, be used * by all modern wireless drivers in Linux, so that they offer a consistent * API through nl80211. For backward compatibility, cfg80211 also offers * wireless extensions to userspace, but hides them from drivers completely. * * Additionally, cfg80211 contains code to help enforce regulatory spectrum * use restrictions. */ /** * DOC: Device registration * * In order for a driver to use cfg80211, it must register the hardware device * with cfg80211. This happens through a number of hardware capability structs * described below. * * The fundamental structure for each device is the 'wiphy', of which each * instance describes a physical wireless device connected to the system. Each * such wiphy can have zero, one, or many virtual interfaces associated with * it, which need to be identified as such by pointing the network interface's * @ieee80211_ptr pointer to a &struct wireless_dev which further describes * the wireless part of the interface, normally this struct is embedded in the * network interface's private data area. Drivers can optionally allow creating * or destroying virtual interfaces on the fly, but without at least one or the * ability to create some the wireless device isn't useful. * * Each wiphy structure contains device capability information, and also has * a pointer to the various operations the driver offers. The definitions and * structures here describe these capabilities in detail. */ struct wiphy; /* * wireless hardware capability structures */ /** * enum ieee80211_channel_flags - channel flags * * Channel flags set by the regulatory control code. * * @IEEE80211_CHAN_DISABLED: This channel is disabled. * @IEEE80211_CHAN_NO_IR: do not initiate radiation, this includes * sending probe requests or beaconing. * @IEEE80211_CHAN_RADAR: Radar detection is required on this channel. * @IEEE80211_CHAN_NO_HT40PLUS: extension channel above this channel * is not permitted. * @IEEE80211_CHAN_NO_HT40MINUS: extension channel below this channel * is not permitted. * @IEEE80211_CHAN_NO_OFDM: OFDM is not allowed on this channel. * @IEEE80211_CHAN_NO_80MHZ: If the driver supports 80 MHz on the band, * this flag indicates that an 80 MHz channel cannot use this * channel as the control or any of the secondary channels. * This may be due to the driver or due to regulatory bandwidth * restrictions. * @IEEE80211_CHAN_NO_160MHZ: If the driver supports 160 MHz on the band, * this flag indicates that an 160 MHz channel cannot use this * channel as the control or any of the secondary channels. * This may be due to the driver or due to regulatory bandwidth * restrictions. * @IEEE80211_CHAN_INDOOR_ONLY: see %NL80211_FREQUENCY_ATTR_INDOOR_ONLY * @IEEE80211_CHAN_IR_CONCURRENT: see %NL80211_FREQUENCY_ATTR_IR_CONCURRENT * @IEEE80211_CHAN_NO_20MHZ: 20 MHz bandwidth is not permitted * on this channel. * @IEEE80211_CHAN_NO_10MHZ: 10 MHz bandwidth is not permitted * on this channel. * @IEEE80211_CHAN_NO_HE: HE operation is not permitted on this channel. * @IEEE80211_CHAN_1MHZ: 1 MHz bandwidth is permitted * on this channel. * @IEEE80211_CHAN_2MHZ: 2 MHz bandwidth is permitted * on this channel. * @IEEE80211_CHAN_4MHZ: 4 MHz bandwidth is permitted * on this channel. * @IEEE80211_CHAN_8MHZ: 8 MHz bandwidth is permitted * on this channel. * @IEEE80211_CHAN_16MHZ: 16 MHz bandwidth is permitted * on this channel. * */ enum ieee80211_channel_flags { IEEE80211_CHAN_DISABLED = 1<<0, IEEE80211_CHAN_NO_IR = 1<<1, /* hole at 1<<2 */ IEEE80211_CHAN_RADAR = 1<<3, IEEE80211_CHAN_NO_HT40PLUS = 1<<4, IEEE80211_CHAN_NO_HT40MINUS = 1<<5, IEEE80211_CHAN_NO_OFDM = 1<<6, IEEE80211_CHAN_NO_80MHZ = 1<<7, IEEE80211_CHAN_NO_160MHZ = 1<<8, IEEE80211_CHAN_INDOOR_ONLY = 1<<9, IEEE80211_CHAN_IR_CONCURRENT = 1<<10, IEEE80211_CHAN_NO_20MHZ = 1<<11, IEEE80211_CHAN_NO_10MHZ = 1<<12, IEEE80211_CHAN_NO_HE = 1<<13, IEEE80211_CHAN_1MHZ = 1<<14, IEEE80211_CHAN_2MHZ = 1<<15, IEEE80211_CHAN_4MHZ = 1<<16, IEEE80211_CHAN_8MHZ = 1<<17, IEEE80211_CHAN_16MHZ = 1<<18, }; #define IEEE80211_CHAN_NO_HT40 \ (IEEE80211_CHAN_NO_HT40PLUS | IEEE80211_CHAN_NO_HT40MINUS) #define IEEE80211_DFS_MIN_CAC_TIME_MS 60000 #define IEEE80211_DFS_MIN_NOP_TIME_MS (30 * 60 * 1000) /** * struct ieee80211_channel - channel definition * * This structure describes a single channel for use * with cfg80211. * * @center_freq: center frequency in MHz * @freq_offset: offset from @center_freq, in KHz * @hw_value: hardware-specific value for the channel * @flags: channel flags from &enum ieee80211_channel_flags. * @orig_flags: channel flags at registration time, used by regulatory * code to support devices with additional restrictions * @band: band this channel belongs to. * @max_antenna_gain: maximum antenna gain in dBi * @max_power: maximum transmission power (in dBm) * @max_reg_power: maximum regulatory transmission power (in dBm) * @beacon_found: helper to regulatory code to indicate when a beacon * has been found on this channel. Use regulatory_hint_found_beacon() * to enable this, this is useful only on 5 GHz band. * @orig_mag: internal use * @orig_mpwr: internal use * @dfs_state: current state of this channel. Only relevant if radar is required * on this channel. * @dfs_state_entered: timestamp (jiffies) when the dfs state was entered. * @dfs_cac_ms: DFS CAC time in milliseconds, this is valid for DFS channels. */ struct ieee80211_channel { enum nl80211_band band; u32 center_freq; u16 freq_offset; u16 hw_value; u32 flags; int max_antenna_gain; int max_power; int max_reg_power; bool beacon_found; u32 orig_flags; int orig_mag, orig_mpwr; enum nl80211_dfs_state dfs_state; unsigned long dfs_state_entered; unsigned int dfs_cac_ms; }; /** * enum ieee80211_rate_flags - rate flags * * Hardware/specification flags for rates. These are structured * in a way that allows using the same bitrate structure for * different bands/PHY modes. * * @IEEE80211_RATE_SHORT_PREAMBLE: Hardware can send with short * preamble on this bitrate; only relevant in 2.4GHz band and * with CCK rates. * @IEEE80211_RATE_MANDATORY_A: This bitrate is a mandatory rate * when used with 802.11a (on the 5 GHz band); filled by the * core code when registering the wiphy. * @IEEE80211_RATE_MANDATORY_B: This bitrate is a mandatory rate * when used with 802.11b (on the 2.4 GHz band); filled by the * core code when registering the wiphy. * @IEEE80211_RATE_MANDATORY_G: This bitrate is a mandatory rate * when used with 802.11g (on the 2.4 GHz band); filled by the * core code when registering the wiphy. * @IEEE80211_RATE_ERP_G: This is an ERP rate in 802.11g mode. * @IEEE80211_RATE_SUPPORTS_5MHZ: Rate can be used in 5 MHz mode * @IEEE80211_RATE_SUPPORTS_10MHZ: Rate can be used in 10 MHz mode */ enum ieee80211_rate_flags { IEEE80211_RATE_SHORT_PREAMBLE = 1<<0, IEEE80211_RATE_MANDATORY_A = 1<<1, IEEE80211_RATE_MANDATORY_B = 1<<2, IEEE80211_RATE_MANDATORY_G = 1<<3, IEEE80211_RATE_ERP_G = 1<<4, IEEE80211_RATE_SUPPORTS_5MHZ = 1<<5, IEEE80211_RATE_SUPPORTS_10MHZ = 1<<6, }; /** * enum ieee80211_bss_type - BSS type filter * * @IEEE80211_BSS_TYPE_ESS: Infrastructure BSS * @IEEE80211_BSS_TYPE_PBSS: Personal BSS * @IEEE80211_BSS_TYPE_IBSS: Independent BSS * @IEEE80211_BSS_TYPE_MBSS: Mesh BSS * @IEEE80211_BSS_TYPE_ANY: Wildcard value for matching any BSS type */ enum ieee80211_bss_type { IEEE80211_BSS_TYPE_ESS, IEEE80211_BSS_TYPE_PBSS, IEEE80211_BSS_TYPE_IBSS, IEEE80211_BSS_TYPE_MBSS, IEEE80211_BSS_TYPE_ANY }; /** * enum ieee80211_privacy - BSS privacy filter * * @IEEE80211_PRIVACY_ON: privacy bit set * @IEEE80211_PRIVACY_OFF: privacy bit clear * @IEEE80211_PRIVACY_ANY: Wildcard value for matching any privacy setting */ enum ieee80211_privacy { IEEE80211_PRIVACY_ON, IEEE80211_PRIVACY_OFF, IEEE80211_PRIVACY_ANY }; #define IEEE80211_PRIVACY(x) \ ((x) ? IEEE80211_PRIVACY_ON : IEEE80211_PRIVACY_OFF) /** * struct ieee80211_rate - bitrate definition * * This structure describes a bitrate that an 802.11 PHY can * operate with. The two values @hw_value and @hw_value_short * are only for driver use when pointers to this structure are * passed around. * * @flags: rate-specific flags * @bitrate: bitrate in units of 100 Kbps * @hw_value: driver/hardware value for this rate * @hw_value_short: driver/hardware value for this rate when * short preamble is used */ struct ieee80211_rate { u32 flags; u16 bitrate; u16 hw_value, hw_value_short; }; /** * struct ieee80211_he_obss_pd - AP settings for spatial reuse * * @enable: is the feature enabled. * @sr_ctrl: The SR Control field of SRP element. * @non_srg_max_offset: non-SRG maximum tx power offset * @min_offset: minimal tx power offset an associated station shall use * @max_offset: maximum tx power offset an associated station shall use * @bss_color_bitmap: bitmap that indicates the BSS color values used by * members of the SRG * @partial_bssid_bitmap: bitmap that indicates the partial BSSID values * used by members of the SRG */ struct ieee80211_he_obss_pd { bool enable; u8 sr_ctrl; u8 non_srg_max_offset; u8 min_offset; u8 max_offset; u8 bss_color_bitmap[8]; u8 partial_bssid_bitmap[8]; }; /** * struct cfg80211_he_bss_color - AP settings for BSS coloring * * @color: the current color. * @enabled: HE BSS color is used * @partial: define the AID equation. */ struct cfg80211_he_bss_color { u8 color; bool enabled; bool partial; }; /** * struct ieee80211_he_bss_color - AP settings for BSS coloring * * @color: the current color. * @disabled: is the feature disabled. * @partial: define the AID equation. */ struct ieee80211_he_bss_color { u8 color; bool disabled; bool partial; }; /** * struct ieee80211_sta_ht_cap - STA's HT capabilities * * This structure describes most essential parameters needed * to describe 802.11n HT capabilities for an STA. * * @ht_supported: is HT supported by the STA * @cap: HT capabilities map as described in 802.11n spec * @ampdu_factor: Maximum A-MPDU length factor * @ampdu_density: Minimum A-MPDU spacing * @mcs: Supported MCS rates */ struct ieee80211_sta_ht_cap { u16 cap; /* use IEEE80211_HT_CAP_ */ bool ht_supported; u8 ampdu_factor; u8 ampdu_density; struct ieee80211_mcs_info mcs; }; /** * struct ieee80211_sta_vht_cap - STA's VHT capabilities * * This structure describes most essential parameters needed * to describe 802.11ac VHT capabilities for an STA. * * @vht_supported: is VHT supported by the STA * @cap: VHT capabilities map as described in 802.11ac spec * @vht_mcs: Supported VHT MCS rates */ struct ieee80211_sta_vht_cap { bool vht_supported; u32 cap; /* use IEEE80211_VHT_CAP_ */ struct ieee80211_vht_mcs_info vht_mcs; }; #define IEEE80211_HE_PPE_THRES_MAX_LEN 25 /** * struct ieee80211_sta_he_cap - STA's HE capabilities * * This structure describes most essential parameters needed * to describe 802.11ax HE capabilities for a STA. * * @has_he: true iff HE data is valid. * @he_cap_elem: Fixed portion of the HE capabilities element. * @he_mcs_nss_supp: The supported NSS/MCS combinations. * @ppe_thres: Holds the PPE Thresholds data. */ struct ieee80211_sta_he_cap { bool has_he; struct ieee80211_he_cap_elem he_cap_elem; struct ieee80211_he_mcs_nss_supp he_mcs_nss_supp; u8 ppe_thres[IEEE80211_HE_PPE_THRES_MAX_LEN]; }; /** * struct ieee80211_sband_iftype_data * * This structure encapsulates sband data that is relevant for the * interface types defined in @types_mask. Each type in the * @types_mask must be unique across all instances of iftype_data. * * @types_mask: interface types mask * @he_cap: holds the HE capabilities * @he_6ghz_capa: HE 6 GHz capabilities, must be filled in for a * 6 GHz band channel (and 0 may be valid value). */ struct ieee80211_sband_iftype_data { u16 types_mask; struct ieee80211_sta_he_cap he_cap; struct ieee80211_he_6ghz_capa he_6ghz_capa; }; /** * enum ieee80211_edmg_bw_config - allowed channel bandwidth configurations * * @IEEE80211_EDMG_BW_CONFIG_4: 2.16GHz * @IEEE80211_EDMG_BW_CONFIG_5: 2.16GHz and 4.32GHz * @IEEE80211_EDMG_BW_CONFIG_6: 2.16GHz, 4.32GHz and 6.48GHz * @IEEE80211_EDMG_BW_CONFIG_7: 2.16GHz, 4.32GHz, 6.48GHz and 8.64GHz * @IEEE80211_EDMG_BW_CONFIG_8: 2.16GHz and 2.16GHz + 2.16GHz * @IEEE80211_EDMG_BW_CONFIG_9: 2.16GHz, 4.32GHz and 2.16GHz + 2.16GHz * @IEEE80211_EDMG_BW_CONFIG_10: 2.16GHz, 4.32GHz, 6.48GHz and 2.16GHz+2.16GHz * @IEEE80211_EDMG_BW_CONFIG_11: 2.16GHz, 4.32GHz, 6.48GHz, 8.64GHz and * 2.16GHz+2.16GHz * @IEEE80211_EDMG_BW_CONFIG_12: 2.16GHz, 2.16GHz + 2.16GHz and * 4.32GHz + 4.32GHz * @IEEE80211_EDMG_BW_CONFIG_13: 2.16GHz, 4.32GHz, 2.16GHz + 2.16GHz and * 4.32GHz + 4.32GHz * @IEEE80211_EDMG_BW_CONFIG_14: 2.16GHz, 4.32GHz, 6.48GHz, 2.16GHz + 2.16GHz * and 4.32GHz + 4.32GHz * @IEEE80211_EDMG_BW_CONFIG_15: 2.16GHz, 4.32GHz, 6.48GHz, 8.64GHz, * 2.16GHz + 2.16GHz and 4.32GHz + 4.32GHz */ enum ieee80211_edmg_bw_config { IEEE80211_EDMG_BW_CONFIG_4 = 4, IEEE80211_EDMG_BW_CONFIG_5 = 5, IEEE80211_EDMG_BW_CONFIG_6 = 6, IEEE80211_EDMG_BW_CONFIG_7 = 7, IEEE80211_EDMG_BW_CONFIG_8 = 8, IEEE80211_EDMG_BW_CONFIG_9 = 9, IEEE80211_EDMG_BW_CONFIG_10 = 10, IEEE80211_EDMG_BW_CONFIG_11 = 11, IEEE80211_EDMG_BW_CONFIG_12 = 12, IEEE80211_EDMG_BW_CONFIG_13 = 13, IEEE80211_EDMG_BW_CONFIG_14 = 14, IEEE80211_EDMG_BW_CONFIG_15 = 15, }; /** * struct ieee80211_edmg - EDMG configuration * * This structure describes most essential parameters needed * to describe 802.11ay EDMG configuration * * @channels: bitmap that indicates the 2.16 GHz channel(s) * that are allowed to be used for transmissions. * Bit 0 indicates channel 1, bit 1 indicates channel 2, etc. * Set to 0 indicate EDMG not supported. * @bw_config: Channel BW Configuration subfield encodes * the allowed channel bandwidth configurations */ struct ieee80211_edmg { u8 channels; enum ieee80211_edmg_bw_config bw_config; }; /** * struct ieee80211_sta_s1g_cap - STA's S1G capabilities * * This structure describes most essential parameters needed * to describe 802.11ah S1G capabilities for a STA. * * @s1g_supported: is STA an S1G STA * @cap: S1G capabilities information * @nss_mcs: Supported NSS MCS set */ struct ieee80211_sta_s1g_cap { bool s1g; u8 cap[10]; /* use S1G_CAPAB_ */ u8 nss_mcs[5]; }; /** * struct ieee80211_supported_band - frequency band definition * * This structure describes a frequency band a wiphy * is able to operate in. * * @channels: Array of channels the hardware can operate with * in this band. * @band: the band this structure represents * @n_channels: Number of channels in @channels * @bitrates: Array of bitrates the hardware can operate with * in this band. Must be sorted to give a valid "supported * rates" IE, i.e. CCK rates first, then OFDM. * @n_bitrates: Number of bitrates in @bitrates * @ht_cap: HT capabilities in this band * @vht_cap: VHT capabilities in this band * @s1g_cap: S1G capabilities in this band * @edmg_cap: EDMG capabilities in this band * @s1g_cap: S1G capabilities in this band (S1B band only, of course) * @n_iftype_data: number of iftype data entries * @iftype_data: interface type data entries. Note that the bits in * @types_mask inside this structure cannot overlap (i.e. only * one occurrence of each type is allowed across all instances of * iftype_data). */ struct ieee80211_supported_band { struct ieee80211_channel *channels; struct ieee80211_rate *bitrates; enum nl80211_band band; int n_channels; int n_bitrates; struct ieee80211_sta_ht_cap ht_cap; struct ieee80211_sta_vht_cap vht_cap; struct ieee80211_sta_s1g_cap s1g_cap; struct ieee80211_edmg edmg_cap; u16 n_iftype_data; const struct ieee80211_sband_iftype_data *iftype_data; }; /** * ieee80211_get_sband_iftype_data - return sband data for a given iftype * @sband: the sband to search for the STA on * @iftype: enum nl80211_iftype * * Return: pointer to struct ieee80211_sband_iftype_data, or NULL is none found */ static inline const struct ieee80211_sband_iftype_data * ieee80211_get_sband_iftype_data(const struct ieee80211_supported_band *sband, u8 iftype) { int i; if (WARN_ON(iftype >= NL80211_IFTYPE_MAX)) return NULL; for (i = 0; i < sband->n_iftype_data; i++) { const struct ieee80211_sband_iftype_data *data = &sband->iftype_data[i]; if (data->types_mask & BIT(iftype)) return data; } return NULL; } /** * ieee80211_get_he_iftype_cap - return HE capabilities for an sband's iftype * @sband: the sband to search for the iftype on * @iftype: enum nl80211_iftype * * Return: pointer to the struct ieee80211_sta_he_cap, or NULL is none found */ static inline const struct ieee80211_sta_he_cap * ieee80211_get_he_iftype_cap(const struct ieee80211_supported_band *sband, u8 iftype) { const struct ieee80211_sband_iftype_data *data = ieee80211_get_sband_iftype_data(sband, iftype); if (data && data->he_cap.has_he) return &data->he_cap; return NULL; } /** * ieee80211_get_he_sta_cap - return HE capabilities for an sband's STA * @sband: the sband to search for the STA on * * Return: pointer to the struct ieee80211_sta_he_cap, or NULL is none found */ static inline const struct ieee80211_sta_he_cap * ieee80211_get_he_sta_cap(const struct ieee80211_supported_band *sband) { return ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_STATION); } /** * ieee80211_get_he_6ghz_capa - return HE 6 GHz capabilities * @sband: the sband to search for the STA on * @iftype: the iftype to search for * * Return: the 6GHz capabilities */ static inline __le16 ieee80211_get_he_6ghz_capa(const struct ieee80211_supported_band *sband, enum nl80211_iftype iftype) { const struct ieee80211_sband_iftype_data *data = ieee80211_get_sband_iftype_data(sband, iftype); if (WARN_ON(!data || !data->he_cap.has_he)) return 0; return data->he_6ghz_capa.capa; } /** * wiphy_read_of_freq_limits - read frequency limits from device tree * * @wiphy: the wireless device to get extra limits for * * Some devices may have extra limitations specified in DT. This may be useful * for chipsets that normally support more bands but are limited due to board * design (e.g. by antennas or external power amplifier). * * This function reads info from DT and uses it to *modify* channels (disable * unavailable ones). It's usually a *bad* idea to use it in drivers with * shared channel data as DT limitations are device specific. You should make * sure to call it only if channels in wiphy are copied and can be modified * without affecting other devices. * * As this function access device node it has to be called after set_wiphy_dev. * It also modifies channels so they have to be set first. * If using this helper, call it before wiphy_register(). */ #ifdef CONFIG_OF void wiphy_read_of_freq_limits(struct wiphy *wiphy); #else /* CONFIG_OF */ static inline void wiphy_read_of_freq_limits(struct wiphy *wiphy) { } #endif /* !CONFIG_OF */ /* * Wireless hardware/device configuration structures and methods */ /** * DOC: Actions and configuration * * Each wireless device and each virtual interface offer a set of configuration * operations and other actions that are invoked by userspace. Each of these * actions is described in the operations structure, and the parameters these * operations use are described separately. * * Additionally, some operations are asynchronous and expect to get status * information via some functions that drivers need to call. * * Scanning and BSS list handling with its associated functionality is described * in a separate chapter. */ #define VHT_MUMIMO_GROUPS_DATA_LEN (WLAN_MEMBERSHIP_LEN +\ WLAN_USER_POSITION_LEN) /** * struct vif_params - describes virtual interface parameters * @flags: monitor interface flags, unchanged if 0, otherwise * %MONITOR_FLAG_CHANGED will be set * @use_4addr: use 4-address frames * @macaddr: address to use for this virtual interface. * If this parameter is set to zero address the driver may * determine the address as needed. * This feature is only fully supported by drivers that enable the * %NL80211_FEATURE_MAC_ON_CREATE flag. Others may support creating ** only p2p devices with specified MAC. * @vht_mumimo_groups: MU-MIMO groupID, used for monitoring MU-MIMO packets * belonging to that MU-MIMO groupID; %NULL if not changed * @vht_mumimo_follow_addr: MU-MIMO follow address, used for monitoring * MU-MIMO packets going to the specified station; %NULL if not changed */ struct vif_params { u32 flags; int use_4addr; u8 macaddr[ETH_ALEN]; const u8 *vht_mumimo_groups; const u8 *vht_mumimo_follow_addr; }; /** * struct key_params - key information * * Information about a key * * @key: key material * @key_len: length of key material * @cipher: cipher suite selector * @seq: sequence counter (IV/PN) for TKIP and CCMP keys, only used * with the get_key() callback, must be in little endian, * length given by @seq_len. * @seq_len: length of @seq. * @vlan_id: vlan_id for VLAN group key (if nonzero) * @mode: key install mode (RX_TX, NO_TX or SET_TX) */ struct key_params { const u8 *key; const u8 *seq; int key_len; int seq_len; u16 vlan_id; u32 cipher; enum nl80211_key_mode mode; }; /** * struct cfg80211_chan_def - channel definition * @chan: the (control) channel * @width: channel width * @center_freq1: center frequency of first segment * @center_freq2: center frequency of second segment * (only with 80+80 MHz) * @edmg: define the EDMG channels configuration. * If edmg is requested (i.e. the .channels member is non-zero), * chan will define the primary channel and all other * parameters are ignored. * @freq1_offset: offset from @center_freq1, in KHz */ struct cfg80211_chan_def { struct ieee80211_channel *chan; enum nl80211_chan_width width; u32 center_freq1; u32 center_freq2; struct ieee80211_edmg edmg; u16 freq1_offset; }; /* * cfg80211_bitrate_mask - masks for bitrate control */ struct cfg80211_bitrate_mask { struct { u32 legacy; u8 ht_mcs[IEEE80211_HT_MCS_MASK_LEN]; u16 vht_mcs[NL80211_VHT_NSS_MAX]; u16 he_mcs[NL80211_HE_NSS_MAX]; enum nl80211_txrate_gi gi; enum nl80211_he_gi he_gi; enum nl80211_he_ltf he_ltf; } control[NUM_NL80211_BANDS]; }; /** * struct cfg80211_tid_cfg - TID specific configuration * @config_override: Flag to notify driver to reset TID configuration * of the peer. * @tids: bitmap of TIDs to modify * @mask: bitmap of attributes indicating which parameter changed, * similar to &nl80211_tid_config_supp. * @noack: noack configuration value for the TID * @retry_long: retry count value * @retry_short: retry count value * @ampdu: Enable/Disable MPDU aggregation * @rtscts: Enable/Disable RTS/CTS * @amsdu: Enable/Disable MSDU aggregation * @txrate_type: Tx bitrate mask type * @txrate_mask: Tx bitrate to be applied for the TID */ struct cfg80211_tid_cfg { bool config_override; u8 tids; u64 mask; enum nl80211_tid_config noack; u8 retry_long, retry_short; enum nl80211_tid_config ampdu; enum nl80211_tid_config rtscts; enum nl80211_tid_config amsdu; enum nl80211_tx_rate_setting txrate_type; struct cfg80211_bitrate_mask txrate_mask; }; /** * struct cfg80211_tid_config - TID configuration * @peer: Station's MAC address * @n_tid_conf: Number of TID specific configurations to be applied * @tid_conf: Configuration change info */ struct cfg80211_tid_config { const u8 *peer; u32 n_tid_conf; struct cfg80211_tid_cfg tid_conf[]; }; /** * cfg80211_get_chandef_type - return old channel type from chandef * @chandef: the channel definition * * Return: The old channel type (NOHT, HT20, HT40+/-) from a given * chandef, which must have a bandwidth allowing this conversion. */ static inline enum nl80211_channel_type cfg80211_get_chandef_type(const struct cfg80211_chan_def *chandef) { switch (chandef->width) { case NL80211_CHAN_WIDTH_20_NOHT: return NL80211_CHAN_NO_HT; case NL80211_CHAN_WIDTH_20: return NL80211_CHAN_HT20; case NL80211_CHAN_WIDTH_40: if (chandef->center_freq1 > chandef->chan->center_freq) return NL80211_CHAN_HT40PLUS; return NL80211_CHAN_HT40MINUS; default: WARN_ON(1); return NL80211_CHAN_NO_HT; } } /** * cfg80211_chandef_create - create channel definition using channel type * @chandef: the channel definition struct to fill * @channel: the control channel * @chantype: the channel type * * Given a channel type, create a channel definition. */ void cfg80211_chandef_create(struct cfg80211_chan_def *chandef, struct ieee80211_channel *channel, enum nl80211_channel_type chantype); /** * cfg80211_chandef_identical - check if two channel definitions are identical * @chandef1: first channel definition * @chandef2: second channel definition * * Return: %true if the channels defined by the channel definitions are * identical, %false otherwise. */ static inline bool cfg80211_chandef_identical(const struct cfg80211_chan_def *chandef1, const struct cfg80211_chan_def *chandef2) { return (chandef1->chan == chandef2->chan && chandef1->width == chandef2->width && chandef1->center_freq1 == chandef2->center_freq1 && chandef1->freq1_offset == chandef2->freq1_offset && chandef1->center_freq2 == chandef2->center_freq2); } /** * cfg80211_chandef_is_edmg - check if chandef represents an EDMG channel * * @chandef: the channel definition * * Return: %true if EDMG defined, %false otherwise. */ static inline bool cfg80211_chandef_is_edmg(const struct cfg80211_chan_def *chandef) { return chandef->edmg.channels || chandef->edmg.bw_config; } /** * cfg80211_chandef_compatible - check if two channel definitions are compatible * @chandef1: first channel definition * @chandef2: second channel definition * * Return: %NULL if the given channel definitions are incompatible, * chandef1 or chandef2 otherwise. */ const struct cfg80211_chan_def * cfg80211_chandef_compatible(const struct cfg80211_chan_def *chandef1, const struct cfg80211_chan_def *chandef2); /** * cfg80211_chandef_valid - check if a channel definition is valid * @chandef: the channel definition to check * Return: %true if the channel definition is valid. %false otherwise. */ bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef); /** * cfg80211_chandef_usable - check if secondary channels can be used * @wiphy: the wiphy to validate against * @chandef: the channel definition to check * @prohibited_flags: the regulatory channel flags that must not be set * Return: %true if secondary channels are usable. %false otherwise. */ bool cfg80211_chandef_usable(struct wiphy *wiphy, const struct cfg80211_chan_def *chandef, u32 prohibited_flags); /** * cfg80211_chandef_dfs_required - checks if radar detection is required * @wiphy: the wiphy to validate against * @chandef: the channel definition to check * @iftype: the interface type as specified in &enum nl80211_iftype * Returns: * 1 if radar detection is required, 0 if it is not, < 0 on error */ int cfg80211_chandef_dfs_required(struct wiphy *wiphy, const struct cfg80211_chan_def *chandef, enum nl80211_iftype iftype); /** * ieee80211_chandef_rate_flags - returns rate flags for a channel * * In some channel types, not all rates may be used - for example CCK * rates may not be used in 5/10 MHz channels. * * @chandef: channel definition for the channel * * Returns: rate flags which apply for this channel */ static inline enum ieee80211_rate_flags ieee80211_chandef_rate_flags(struct cfg80211_chan_def *chandef) { switch (chandef->width) { case NL80211_CHAN_WIDTH_5: return IEEE80211_RATE_SUPPORTS_5MHZ; case NL80211_CHAN_WIDTH_10: return IEEE80211_RATE_SUPPORTS_10MHZ; default: break; } return 0; } /** * ieee80211_chandef_max_power - maximum transmission power for the chandef * * In some regulations, the transmit power may depend on the configured channel * bandwidth which may be defined as dBm/MHz. This function returns the actual * max_power for non-standard (20 MHz) channels. * * @chandef: channel definition for the channel * * Returns: maximum allowed transmission power in dBm for the chandef */ static inline int ieee80211_chandef_max_power(struct cfg80211_chan_def *chandef) { switch (chandef->width) { case NL80211_CHAN_WIDTH_5: return min(chandef->chan->max_reg_power - 6, chandef->chan->max_power); case NL80211_CHAN_WIDTH_10: return min(chandef->chan->max_reg_power - 3, chandef->chan->max_power); default: break; } return chandef->chan->max_power; } /** * enum survey_info_flags - survey information flags * * @SURVEY_INFO_NOISE_DBM: noise (in dBm) was filled in * @SURVEY_INFO_IN_USE: channel is currently being used * @SURVEY_INFO_TIME: active time (in ms) was filled in * @SURVEY_INFO_TIME_BUSY: busy time was filled in * @SURVEY_INFO_TIME_EXT_BUSY: extension channel busy time was filled in * @SURVEY_INFO_TIME_RX: receive time was filled in * @SURVEY_INFO_TIME_TX: transmit time was filled in * @SURVEY_INFO_TIME_SCAN: scan time was filled in * @SURVEY_INFO_TIME_BSS_RX: local BSS receive time was filled in * * Used by the driver to indicate which info in &struct survey_info * it has filled in during the get_survey(). */ enum survey_info_flags { SURVEY_INFO_NOISE_DBM = BIT(0), SURVEY_INFO_IN_USE = BIT(1), SURVEY_INFO_TIME = BIT(2), SURVEY_INFO_TIME_BUSY = BIT(3), SURVEY_INFO_TIME_EXT_BUSY = BIT(4), SURVEY_INFO_TIME_RX = BIT(5), SURVEY_INFO_TIME_TX = BIT(6), SURVEY_INFO_TIME_SCAN = BIT(7), SURVEY_INFO_TIME_BSS_RX = BIT(8), }; /** * struct survey_info - channel survey response * * @channel: the channel this survey record reports, may be %NULL for a single * record to report global statistics * @filled: bitflag of flags from &enum survey_info_flags * @noise: channel noise in dBm. This and all following fields are * optional * @time: amount of time in ms the radio was turn on (on the channel) * @time_busy: amount of time the primary channel was sensed busy * @time_ext_busy: amount of time the extension channel was sensed busy * @time_rx: amount of time the radio spent receiving data * @time_tx: amount of time the radio spent transmitting data * @time_scan: amount of time the radio spent for scanning * @time_bss_rx: amount of time the radio spent receiving data on a local BSS * * Used by dump_survey() to report back per-channel survey information. * * This structure can later be expanded with things like * channel duty cycle etc. */ struct survey_info { struct ieee80211_channel *channel; u64 time; u64 time_busy; u64 time_ext_busy; u64 time_rx; u64 time_tx; u64 time_scan; u64 time_bss_rx; u32 filled; s8 noise; }; #define CFG80211_MAX_WEP_KEYS 4 /** * struct cfg80211_crypto_settings - Crypto settings * @wpa_versions: indicates which, if any, WPA versions are enabled * (from enum nl80211_wpa_versions) * @cipher_group: group key cipher suite (or 0 if unset) * @n_ciphers_pairwise: number of AP supported unicast ciphers * @ciphers_pairwise: unicast key cipher suites * @n_akm_suites: number of AKM suites * @akm_suites: AKM suites * @control_port: Whether user space controls IEEE 802.1X port, i.e., * sets/clears %NL80211_STA_FLAG_AUTHORIZED. If true, the driver is * required to assume that the port is unauthorized until authorized by * user space. Otherwise, port is marked authorized by default. * @control_port_ethertype: the control port protocol that should be * allowed through even on unauthorized ports * @control_port_no_encrypt: TRUE to prevent encryption of control port * protocol frames. * @control_port_over_nl80211: TRUE if userspace expects to exchange control * port frames over NL80211 instead of the network interface. * @control_port_no_preauth: disables pre-auth rx over the nl80211 control * port for mac80211 * @wep_keys: static WEP keys, if not NULL points to an array of * CFG80211_MAX_WEP_KEYS WEP keys * @wep_tx_key: key index (0..3) of the default TX static WEP key * @psk: PSK (for devices supporting 4-way-handshake offload) * @sae_pwd: password for SAE authentication (for devices supporting SAE * offload) * @sae_pwd_len: length of SAE password (for devices supporting SAE offload) */ struct cfg80211_crypto_settings { u32 wpa_versions; u32 cipher_group; int n_ciphers_pairwise; u32 ciphers_pairwise[NL80211_MAX_NR_CIPHER_SUITES]; int n_akm_suites; u32 akm_suites[NL80211_MAX_NR_AKM_SUITES]; bool control_port; __be16 control_port_ethertype; bool control_port_no_encrypt; bool control_port_over_nl80211; bool control_port_no_preauth; struct key_params *wep_keys; int wep_tx_key; const u8 *psk; const u8 *sae_pwd; u8 sae_pwd_len; }; /** * struct cfg80211_beacon_data - beacon data * @head: head portion of beacon (before TIM IE) * or %NULL if not changed * @tail: tail portion of beacon (after TIM IE) * or %NULL if not changed * @head_len: length of @head * @tail_len: length of @tail * @beacon_ies: extra information element(s) to add into Beacon frames or %NULL * @beacon_ies_len: length of beacon_ies in octets * @proberesp_ies: extra information element(s) to add into Probe Response * frames or %NULL * @proberesp_ies_len: length of proberesp_ies in octets * @assocresp_ies: extra information element(s) to add into (Re)Association * Response frames or %NULL * @assocresp_ies_len: length of assocresp_ies in octets * @probe_resp_len: length of probe response template (@probe_resp) * @probe_resp: probe response template (AP mode only) * @ftm_responder: enable FTM responder functionality; -1 for no change * (which also implies no change in LCI/civic location data) * @lci: Measurement Report element content, starting with Measurement Token * (measurement type 8) * @civicloc: Measurement Report element content, starting with Measurement * Token (measurement type 11) * @lci_len: LCI data length * @civicloc_len: Civic location data length */ struct cfg80211_beacon_data { const u8 *head, *tail; const u8 *beacon_ies; const u8 *proberesp_ies; const u8 *assocresp_ies; const u8 *probe_resp; const u8 *lci; const u8 *civicloc; s8 ftm_responder; size_t head_len, tail_len; size_t beacon_ies_len; size_t proberesp_ies_len; size_t assocresp_ies_len; size_t probe_resp_len; size_t lci_len; size_t civicloc_len; }; struct mac_address { u8 addr[ETH_ALEN]; }; /** * struct cfg80211_acl_data - Access control list data * * @acl_policy: ACL policy to be applied on the station's * entry specified by mac_addr * @n_acl_entries: Number of MAC address entries passed * @mac_addrs: List of MAC addresses of stations to be used for ACL */ struct cfg80211_acl_data { enum nl80211_acl_policy acl_policy; int n_acl_entries; /* Keep it last */ struct mac_address mac_addrs[]; }; /** * struct cfg80211_fils_discovery - FILS discovery parameters from * IEEE Std 802.11ai-2016, Annex C.3 MIB detail. * * @min_interval: Minimum packet interval in TUs (0 - 10000) * @max_interval: Maximum packet interval in TUs (0 - 10000) * @tmpl_len: Template length * @tmpl: Template data for FILS discovery frame including the action * frame headers. */ struct cfg80211_fils_discovery { u32 min_interval; u32 max_interval; size_t tmpl_len; const u8 *tmpl; }; /** * struct cfg80211_unsol_bcast_probe_resp - Unsolicited broadcast probe * response parameters in 6GHz. * * @interval: Packet interval in TUs. Maximum allowed is 20 TU, as mentioned * in IEEE P802.11ax/D6.0 26.17.2.3.2 - AP behavior for fast passive * scanning * @tmpl_len: Template length * @tmpl: Template data for probe response */ struct cfg80211_unsol_bcast_probe_resp { u32 interval; size_t tmpl_len; const u8 *tmpl; }; /** * enum cfg80211_ap_settings_flags - AP settings flags * * Used by cfg80211_ap_settings * * @AP_SETTINGS_EXTERNAL_AUTH_SUPPORT: AP supports external authentication */ enum cfg80211_ap_settings_flags { AP_SETTINGS_EXTERNAL_AUTH_SUPPORT = BIT(0), }; /** * struct cfg80211_ap_settings - AP configuration * * Used to configure an AP interface. * * @chandef: defines the channel to use * @beacon: beacon data * @beacon_interval: beacon interval * @dtim_period: DTIM period * @ssid: SSID to be used in the BSS (note: may be %NULL if not provided from * user space) * @ssid_len: length of @ssid * @hidden_ssid: whether to hide the SSID in Beacon/Probe Response frames * @crypto: crypto settings * @privacy: the BSS uses privacy * @auth_type: Authentication type (algorithm) * @smps_mode: SMPS mode * @inactivity_timeout: time in seconds to determine station's inactivity. * @p2p_ctwindow: P2P CT Window * @p2p_opp_ps: P2P opportunistic PS * @acl: ACL configuration used by the drivers which has support for * MAC address based access control * @pbss: If set, start as a PCP instead of AP. Relevant for DMG * networks. * @beacon_rate: bitrate to be used for beacons * @ht_cap: HT capabilities (or %NULL if HT isn't enabled) * @vht_cap: VHT capabilities (or %NULL if VHT isn't enabled) * @he_cap: HE capabilities (or %NULL if HE isn't enabled) * @ht_required: stations must support HT * @vht_required: stations must support VHT * @twt_responder: Enable Target Wait Time * @he_required: stations must support HE * @flags: flags, as defined in enum cfg80211_ap_settings_flags * @he_obss_pd: OBSS Packet Detection settings * @he_bss_color: BSS Color settings * @he_oper: HE operation IE (or %NULL if HE isn't enabled) * @fils_discovery: FILS discovery transmission parameters * @unsol_bcast_probe_resp: Unsolicited broadcast probe response parameters */ struct cfg80211_ap_settings { struct cfg80211_chan_def chandef; struct cfg80211_beacon_data beacon; int beacon_interval, dtim_period; const u8 *ssid; size_t ssid_len; enum nl80211_hidden_ssid hidden_ssid; struct cfg80211_crypto_settings crypto; bool privacy; enum nl80211_auth_type auth_type; enum nl80211_smps_mode smps_mode; int inactivity_timeout; u8 p2p_ctwindow; bool p2p_opp_ps; const struct cfg80211_acl_data *acl; bool pbss; struct cfg80211_bitrate_mask beacon_rate; const struct ieee80211_ht_cap *ht_cap; const struct ieee80211_vht_cap *vht_cap; const struct ieee80211_he_cap_elem *he_cap; const struct ieee80211_he_operation *he_oper; bool ht_required, vht_required, he_required; bool twt_responder; u32 flags; struct ieee80211_he_obss_pd he_obss_pd; struct cfg80211_he_bss_color he_bss_color; struct cfg80211_fils_discovery fils_discovery; struct cfg80211_unsol_bcast_probe_resp unsol_bcast_probe_resp; }; /** * struct cfg80211_csa_settings - channel switch settings * * Used for channel switch * * @chandef: defines the channel to use after the switch * @beacon_csa: beacon data while performing the switch * @counter_offsets_beacon: offsets of the counters within the beacon (tail) * @counter_offsets_presp: offsets of the counters within the probe response * @n_counter_offsets_beacon: number of csa counters the beacon (tail) * @n_counter_offsets_presp: number of csa counters in the probe response * @beacon_after: beacon data to be used on the new channel * @radar_required: whether radar detection is required on the new channel * @block_tx: whether transmissions should be blocked while changing * @count: number of beacons until switch */ struct cfg80211_csa_settings { struct cfg80211_chan_def chandef; struct cfg80211_beacon_data beacon_csa; const u16 *counter_offsets_beacon; const u16 *counter_offsets_presp; unsigned int n_counter_offsets_beacon; unsigned int n_counter_offsets_presp; struct cfg80211_beacon_data beacon_after; bool radar_required; bool block_tx; u8 count; }; #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10 /** * struct iface_combination_params - input parameters for interface combinations * * Used to pass interface combination parameters * * @num_different_channels: the number of different channels we want * to use for verification * @radar_detect: a bitmap where each bit corresponds to a channel * width where radar detection is needed, as in the definition of * &struct ieee80211_iface_combination.@radar_detect_widths * @iftype_num: array with the number of interfaces of each interface * type. The index is the interface type as specified in &enum * nl80211_iftype. * @new_beacon_int: set this to the beacon interval of a new interface * that's not operating yet, if such is to be checked as part of * the verification */ struct iface_combination_params { int num_different_channels; u8 radar_detect; int iftype_num[NUM_NL80211_IFTYPES]; u32 new_beacon_int; }; /** * enum station_parameters_apply_mask - station parameter values to apply * @STATION_PARAM_APPLY_UAPSD: apply new uAPSD parameters (uapsd_queues, max_sp) * @STATION_PARAM_APPLY_CAPABILITY: apply new capability * @STATION_PARAM_APPLY_PLINK_STATE: apply new plink state * * Not all station parameters have in-band "no change" signalling, * for those that don't these flags will are used. */ enum station_parameters_apply_mask { STATION_PARAM_APPLY_UAPSD = BIT(0), STATION_PARAM_APPLY_CAPABILITY = BIT(1), STATION_PARAM_APPLY_PLINK_STATE = BIT(2), STATION_PARAM_APPLY_STA_TXPOWER = BIT(3), }; /** * struct sta_txpwr - station txpower configuration * * Used to configure txpower for station. * * @power: tx power (in dBm) to be used for sending data traffic. If tx power * is not provided, the default per-interface tx power setting will be * overriding. Driver should be picking up the lowest tx power, either tx * power per-interface or per-station. * @type: In particular if TPC %type is NL80211_TX_POWER_LIMITED then tx power * will be less than or equal to specified from userspace, whereas if TPC * %type is NL80211_TX_POWER_AUTOMATIC then it indicates default tx power. * NL80211_TX_POWER_FIXED is not a valid configuration option for * per peer TPC. */ struct sta_txpwr { s16 power; enum nl80211_tx_power_setting type; }; /** * struct station_parameters - station parameters * * Used to change and create a new station. * * @vlan: vlan interface station should belong to * @supported_rates: supported rates in IEEE 802.11 format * (or NULL for no change) * @supported_rates_len: number of supported rates * @sta_flags_mask: station flags that changed * (bitmask of BIT(%NL80211_STA_FLAG_...)) * @sta_flags_set: station flags values * (bitmask of BIT(%NL80211_STA_FLAG_...)) * @listen_interval: listen interval or -1 for no change * @aid: AID or zero for no change * @vlan_id: VLAN ID for station (if nonzero) * @peer_aid: mesh peer AID or zero for no change * @plink_action: plink action to take * @plink_state: set the peer link state for a station * @ht_capa: HT capabilities of station * @vht_capa: VHT capabilities of station * @uapsd_queues: bitmap of queues configured for uapsd. same format * as the AC bitmap in the QoS info field * @max_sp: max Service Period. same format as the MAX_SP in the * QoS info field (but already shifted down) * @sta_modify_mask: bitmap indicating which parameters changed * (for those that don't have a natural "no change" value), * see &enum station_parameters_apply_mask * @local_pm: local link-specific mesh power save mode (no change when set * to unknown) * @capability: station capability * @ext_capab: extended capabilities of the station * @ext_capab_len: number of extended capabilities * @supported_channels: supported channels in IEEE 802.11 format * @supported_channels_len: number of supported channels * @supported_oper_classes: supported oper classes in IEEE 802.11 format * @supported_oper_classes_len: number of supported operating classes * @opmode_notif: operating mode field from Operating Mode Notification * @opmode_notif_used: information if operating mode field is used * @support_p2p_ps: information if station supports P2P PS mechanism * @he_capa: HE capabilities of station * @he_capa_len: the length of the HE capabilities * @airtime_weight: airtime scheduler weight for this station * @txpwr: transmit power for an associated station * @he_6ghz_capa: HE 6 GHz Band capabilities of station */ struct station_parameters { const u8 *supported_rates; struct net_device *vlan; u32 sta_flags_mask, sta_flags_set; u32 sta_modify_mask; int listen_interval; u16 aid; u16 vlan_id; u16 peer_aid; u8 supported_rates_len; u8 plink_action; u8 plink_state; const struct ieee80211_ht_cap *ht_capa; const struct ieee80211_vht_cap *vht_capa; u8 uapsd_queues; u8 max_sp; enum nl80211_mesh_power_mode local_pm; u16 capability; const u8 *ext_capab; u8 ext_capab_len; const u8 *supported_channels; u8 supported_channels_len; const u8 *supported_oper_classes; u8 supported_oper_classes_len; u8 opmode_notif; bool opmode_notif_used; int support_p2p_ps; const struct ieee80211_he_cap_elem *he_capa; u8 he_capa_len; u16 airtime_weight; struct sta_txpwr txpwr; const struct ieee80211_he_6ghz_capa *he_6ghz_capa; }; /** * struct station_del_parameters - station deletion parameters * * Used to delete a station entry (or all stations). * * @mac: MAC address of the station to remove or NULL to remove all stations * @subtype: Management frame subtype to use for indicating removal * (10 = Disassociation, 12 = Deauthentication) * @reason_code: Reason code for the Disassociation/Deauthentication frame */ struct station_del_parameters { const u8 *mac; u8 subtype; u16 reason_code; }; /** * enum cfg80211_station_type - the type of station being modified * @CFG80211_STA_AP_CLIENT: client of an AP interface * @CFG80211_STA_AP_CLIENT_UNASSOC: client of an AP interface that is still * unassociated (update properties for this type of client is permitted) * @CFG80211_STA_AP_MLME_CLIENT: client of an AP interface that has * the AP MLME in the device * @CFG80211_STA_AP_STA: AP station on managed interface * @CFG80211_STA_IBSS: IBSS station * @CFG80211_STA_TDLS_PEER_SETUP: TDLS peer on managed interface (dummy entry * while TDLS setup is in progress, it moves out of this state when * being marked authorized; use this only if TDLS with external setup is * supported/used) * @CFG80211_STA_TDLS_PEER_ACTIVE: TDLS peer on managed interface (active * entry that is operating, has been marked authorized by userspace) * @CFG80211_STA_MESH_PEER_KERNEL: peer on mesh interface (kernel managed) * @CFG80211_STA_MESH_PEER_USER: peer on mesh interface (user managed) */ enum cfg80211_station_type { CFG80211_STA_AP_CLIENT, CFG80211_STA_AP_CLIENT_UNASSOC, CFG80211_STA_AP_MLME_CLIENT, CFG80211_STA_AP_STA, CFG80211_STA_IBSS, CFG80211_STA_TDLS_PEER_SETUP, CFG80211_STA_TDLS_PEER_ACTIVE, CFG80211_STA_MESH_PEER_KERNEL, CFG80211_STA_MESH_PEER_USER, }; /** * cfg80211_check_station_change - validate parameter changes * @wiphy: the wiphy this operates on * @params: the new parameters for a station * @statype: the type of station being modified * * Utility function for the @change_station driver method. Call this function * with the appropriate station type looking up the station (and checking that * it exists). It will verify whether the station change is acceptable, and if * not will return an error code. Note that it may modify the parameters for * backward compatibility reasons, so don't use them before calling this. */ int cfg80211_check_station_change(struct wiphy *wiphy, struct station_parameters *params, enum cfg80211_station_type statype); /** * enum rate_info_flags - bitrate info flags * * Used by the driver to indicate the specific rate transmission * type for 802.11n transmissions. * * @RATE_INFO_FLAGS_MCS: mcs field filled with HT MCS * @RATE_INFO_FLAGS_VHT_MCS: mcs field filled with VHT MCS * @RATE_INFO_FLAGS_SHORT_GI: 400ns guard interval * @RATE_INFO_FLAGS_DMG: 60GHz MCS * @RATE_INFO_FLAGS_HE_MCS: HE MCS information * @RATE_INFO_FLAGS_EDMG: 60GHz MCS in EDMG mode */ enum rate_info_flags { RATE_INFO_FLAGS_MCS = BIT(0), RATE_INFO_FLAGS_VHT_MCS = BIT(1), RATE_INFO_FLAGS_SHORT_GI = BIT(2), RATE_INFO_FLAGS_DMG = BIT(3), RATE_INFO_FLAGS_HE_MCS = BIT(4), RATE_INFO_FLAGS_EDMG = BIT(5), }; /** * enum rate_info_bw - rate bandwidth information * * Used by the driver to indicate the rate bandwidth. * * @RATE_INFO_BW_5: 5 MHz bandwidth * @RATE_INFO_BW_10: 10 MHz bandwidth * @RATE_INFO_BW_20: 20 MHz bandwidth * @RATE_INFO_BW_40: 40 MHz bandwidth * @RATE_INFO_BW_80: 80 MHz bandwidth * @RATE_INFO_BW_160: 160 MHz bandwidth * @RATE_INFO_BW_HE_RU: bandwidth determined by HE RU allocation */ enum rate_info_bw { RATE_INFO_BW_20 = 0, RATE_INFO_BW_5, RATE_INFO_BW_10, RATE_INFO_BW_40, RATE_INFO_BW_80, RATE_INFO_BW_160, RATE_INFO_BW_HE_RU, }; /** * struct rate_info - bitrate information * * Information about a receiving or transmitting bitrate * * @flags: bitflag of flags from &enum rate_info_flags * @mcs: mcs index if struct describes an HT/VHT/HE rate * @legacy: bitrate in 100kbit/s for 802.11abg * @nss: number of streams (VHT & HE only) * @bw: bandwidth (from &enum rate_info_bw) * @he_gi: HE guard interval (from &enum nl80211_he_gi) * @he_dcm: HE DCM value * @he_ru_alloc: HE RU allocation (from &enum nl80211_he_ru_alloc, * only valid if bw is %RATE_INFO_BW_HE_RU) * @n_bonded_ch: In case of EDMG the number of bonded channels (1-4) */ struct rate_info { u8 flags; u8 mcs; u16 legacy; u8 nss; u8 bw; u8 he_gi; u8 he_dcm; u8 he_ru_alloc; u8 n_bonded_ch; }; /** * enum bss_param_flags - bitrate info flags * * Used by the driver to indicate the specific rate transmission * type for 802.11n transmissions. * * @BSS_PARAM_FLAGS_CTS_PROT: whether CTS protection is enabled * @BSS_PARAM_FLAGS_SHORT_PREAMBLE: whether short preamble is enabled * @BSS_PARAM_FLAGS_SHORT_SLOT_TIME: whether short slot time is enabled */ enum bss_param_flags { BSS_PARAM_FLAGS_CTS_PROT = 1<<0, BSS_PARAM_FLAGS_SHORT_PREAMBLE = 1<<1, BSS_PARAM_FLAGS_SHORT_SLOT_TIME = 1<<2, }; /** * struct sta_bss_parameters - BSS parameters for the attached station * * Information about the currently associated BSS * * @flags: bitflag of flags from &enum bss_param_flags * @dtim_period: DTIM period for the BSS * @beacon_interval: beacon interval */ struct sta_bss_parameters { u8 flags; u8 dtim_period; u16 beacon_interval; }; /** * struct cfg80211_txq_stats - TXQ statistics for this TID * @filled: bitmap of flags using the bits of &enum nl80211_txq_stats to * indicate the relevant values in this struct are filled * @backlog_bytes: total number of bytes currently backlogged * @backlog_packets: total number of packets currently backlogged * @flows: number of new flows seen * @drops: total number of packets dropped * @ecn_marks: total number of packets marked with ECN CE * @overlimit: number of drops due to queue space overflow * @overmemory: number of drops due to memory limit overflow * @collisions: number of hash collisions * @tx_bytes: total number of bytes dequeued * @tx_packets: total number of packets dequeued * @max_flows: maximum number of flows supported */ struct cfg80211_txq_stats { u32 filled; u32 backlog_bytes; u32 backlog_packets; u32 flows; u32 drops; u32 ecn_marks; u32 overlimit; u32 overmemory; u32 collisions; u32 tx_bytes; u32 tx_packets; u32 max_flows; }; /** * struct cfg80211_tid_stats - per-TID statistics * @filled: bitmap of flags using the bits of &enum nl80211_tid_stats to * indicate the relevant values in this struct are filled * @rx_msdu: number of received MSDUs * @tx_msdu: number of (attempted) transmitted MSDUs * @tx_msdu_retries: number of retries (not counting the first) for * transmitted MSDUs * @tx_msdu_failed: number of failed transmitted MSDUs * @txq_stats: TXQ statistics */ struct cfg80211_tid_stats { u32 filled; u64 rx_msdu; u64 tx_msdu; u64 tx_msdu_retries; u64 tx_msdu_failed; struct cfg80211_txq_stats txq_stats; }; #define IEEE80211_MAX_CHAINS 4 /** * struct station_info - station information * * Station information filled by driver for get_station() and dump_station. * * @filled: bitflag of flags using the bits of &enum nl80211_sta_info to * indicate the relevant values in this struct for them * @connected_time: time(in secs) since a station is last connected * @inactive_time: time since last station activity (tx/rx) in milliseconds * @assoc_at: bootime (ns) of the last association * @rx_bytes: bytes (size of MPDUs) received from this station * @tx_bytes: bytes (size of MPDUs) transmitted to this station * @llid: mesh local link id * @plid: mesh peer link id * @plink_state: mesh peer link state * @signal: The signal strength, type depends on the wiphy's signal_type. * For CFG80211_SIGNAL_TYPE_MBM, value is expressed in _dBm_. * @signal_avg: Average signal strength, type depends on the wiphy's signal_type. * For CFG80211_SIGNAL_TYPE_MBM, value is expressed in _dBm_. * @chains: bitmask for filled values in @chain_signal, @chain_signal_avg * @chain_signal: per-chain signal strength of last received packet in dBm * @chain_signal_avg: per-chain signal strength average in dBm * @txrate: current unicast bitrate from this station * @rxrate: current unicast bitrate to this station * @rx_packets: packets (MSDUs & MMPDUs) received from this station * @tx_packets: packets (MSDUs & MMPDUs) transmitted to this station * @tx_retries: cumulative retry counts (MPDUs) * @tx_failed: number of failed transmissions (MPDUs) (retries exceeded, no ACK) * @rx_dropped_misc: Dropped for un-specified reason. * @bss_param: current BSS parameters * @generation: generation number for nl80211 dumps. * This number should increase every time the list of stations * changes, i.e. when a station is added or removed, so that * userspace can tell whether it got a consistent snapshot. * @assoc_req_ies: IEs from (Re)Association Request. * This is used only when in AP mode with drivers that do not use * user space MLME/SME implementation. The information is provided for * the cfg80211_new_sta() calls to notify user space of the IEs. * @assoc_req_ies_len: Length of assoc_req_ies buffer in octets. * @sta_flags: station flags mask & values * @beacon_loss_count: Number of times beacon loss event has triggered. * @t_offset: Time offset of the station relative to this host. * @local_pm: local mesh STA power save mode * @peer_pm: peer mesh STA power save mode * @nonpeer_pm: non-peer mesh STA power save mode * @expected_throughput: expected throughput in kbps (including 802.11 headers) * towards this station. * @rx_beacon: number of beacons received from this peer * @rx_beacon_signal_avg: signal strength average (in dBm) for beacons received * from this peer * @connected_to_gate: true if mesh STA has a path to mesh gate * @rx_duration: aggregate PPDU duration(usecs) for all the frames from a peer * @tx_duration: aggregate PPDU duration(usecs) for all the frames to a peer * @airtime_weight: current airtime scheduling weight * @pertid: per-TID statistics, see &struct cfg80211_tid_stats, using the last * (IEEE80211_NUM_TIDS) index for MSDUs not encapsulated in QoS-MPDUs. * Note that this doesn't use the @filled bit, but is used if non-NULL. * @ack_signal: signal strength (in dBm) of the last ACK frame. * @avg_ack_signal: average rssi value of ack packet for the no of msdu's has * been sent. * @rx_mpdu_count: number of MPDUs received from this station * @fcs_err_count: number of packets (MPDUs) received from this station with * an FCS error. This counter should be incremented only when TA of the * received packet with an FCS error matches the peer MAC address. * @airtime_link_metric: mesh airtime link metric. * @connected_to_as: true if mesh STA has a path to authentication server */ struct station_info { u64 filled; u32 connected_time; u32 inactive_time; u64 assoc_at; u64 rx_bytes; u64 tx_bytes; u16 llid; u16 plid; u8 plink_state; s8 signal; s8 signal_avg; u8 chains; s8 chain_signal[IEEE80211_MAX_CHAINS]; s8 chain_signal_avg[IEEE80211_MAX_CHAINS]; struct rate_info txrate; struct rate_info rxrate; u32 rx_packets; u32 tx_packets; u32 tx_retries; u32 tx_failed; u32 rx_dropped_misc; struct sta_bss_parameters bss_param; struct nl80211_sta_flag_update sta_flags; int generation; const u8 *assoc_req_ies; size_t assoc_req_ies_len; u32 beacon_loss_count; s64 t_offset; enum nl80211_mesh_power_mode local_pm; enum nl80211_mesh_power_mode peer_pm; enum nl80211_mesh_power_mode nonpeer_pm; u32 expected_throughput; u64 tx_duration; u64 rx_duration; u64 rx_beacon; u8 rx_beacon_signal_avg; u8 connected_to_gate; struct cfg80211_tid_stats *pertid; s8 ack_signal; s8 avg_ack_signal; u16 airtime_weight; u32 rx_mpdu_count; u32 fcs_err_count; u32 airtime_link_metric; u8 connected_to_as; }; #if IS_ENABLED(CONFIG_CFG80211) /** * cfg80211_get_station - retrieve information about a given station * @dev: the device where the station is supposed to be connected to * @mac_addr: the mac address of the station of interest * @sinfo: pointer to the structure to fill with the information * * Returns 0 on success and sinfo is filled with the available information * otherwise returns a negative error code and the content of sinfo has to be * considered undefined. */ int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr, struct station_info *sinfo); #else static inline int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr, struct station_info *sinfo) { return -ENOENT; } #endif /** * enum monitor_flags - monitor flags * * Monitor interface configuration flags. Note that these must be the bits * according to the nl80211 flags. * * @MONITOR_FLAG_CHANGED: set if the flags were changed * @MONITOR_FLAG_FCSFAIL: pass frames with bad FCS * @MONITOR_FLAG_PLCPFAIL: pass frames with bad PLCP * @MONITOR_FLAG_CONTROL: pass control frames * @MONITOR_FLAG_OTHER_BSS: disable BSSID filtering * @MONITOR_FLAG_COOK_FRAMES: report frames after processing * @MONITOR_FLAG_ACTIVE: active monitor, ACKs frames on its MAC address */ enum monitor_flags { MONITOR_FLAG_CHANGED = 1<<__NL80211_MNTR_FLAG_INVALID, MONITOR_FLAG_FCSFAIL = 1<<NL80211_MNTR_FLAG_FCSFAIL, MONITOR_FLAG_PLCPFAIL = 1<<NL80211_MNTR_FLAG_PLCPFAIL, MONITOR_FLAG_CONTROL = 1<<NL80211_MNTR_FLAG_CONTROL, MONITOR_FLAG_OTHER_BSS = 1<<NL80211_MNTR_FLAG_OTHER_BSS, MONITOR_FLAG_COOK_FRAMES = 1<<NL80211_MNTR_FLAG_COOK_FRAMES, MONITOR_FLAG_ACTIVE = 1<<NL80211_MNTR_FLAG_ACTIVE, }; /** * enum mpath_info_flags - mesh path information flags * * Used by the driver to indicate which info in &struct mpath_info it has filled * in during get_station() or dump_station(). * * @MPATH_INFO_FRAME_QLEN: @frame_qlen filled * @MPATH_INFO_SN: @sn filled * @MPATH_INFO_METRIC: @metric filled * @MPATH_INFO_EXPTIME: @exptime filled * @MPATH_INFO_DISCOVERY_TIMEOUT: @discovery_timeout filled * @MPATH_INFO_DISCOVERY_RETRIES: @discovery_retries filled * @MPATH_INFO_FLAGS: @flags filled * @MPATH_INFO_HOP_COUNT: @hop_count filled * @MPATH_INFO_PATH_CHANGE: @path_change_count filled */ enum mpath_info_flags { MPATH_INFO_FRAME_QLEN = BIT(0), MPATH_INFO_SN = BIT(1), MPATH_INFO_METRIC = BIT(2), MPATH_INFO_EXPTIME = BIT(3), MPATH_INFO_DISCOVERY_TIMEOUT = BIT(4), MPATH_INFO_DISCOVERY_RETRIES = BIT(5), MPATH_INFO_FLAGS = BIT(6), MPATH_INFO_HOP_COUNT = BIT(7), MPATH_INFO_PATH_CHANGE = BIT(8), }; /** * struct mpath_info - mesh path information * * Mesh path information filled by driver for get_mpath() and dump_mpath(). * * @filled: bitfield of flags from &enum mpath_info_flags * @frame_qlen: number of queued frames for this destination * @sn: target sequence number * @metric: metric (cost) of this mesh path * @exptime: expiration time for the mesh path from now, in msecs * @flags: mesh path flags * @discovery_timeout: total mesh path discovery timeout, in msecs * @discovery_retries: mesh path discovery retries * @generation: generation number for nl80211 dumps. * This number should increase every time the list of mesh paths * changes, i.e. when a station is added or removed, so that * userspace can tell whether it got a consistent snapshot. * @hop_count: hops to destination * @path_change_count: total number of path changes to destination */ struct mpath_info { u32 filled; u32 frame_qlen; u32 sn; u32 metric; u32 exptime; u32 discovery_timeout; u8 discovery_retries; u8 flags; u8 hop_count; u32 path_change_count; int generation; }; /** * struct bss_parameters - BSS parameters * * Used to change BSS parameters (mainly for AP mode). * * @use_cts_prot: Whether to use CTS protection * (0 = no, 1 = yes, -1 = do not change) * @use_short_preamble: Whether the use of short preambles is allowed * (0 = no, 1 = yes, -1 = do not change) * @use_short_slot_time: Whether the use of short slot time is allowed * (0 = no, 1 = yes, -1 = do not change) * @basic_rates: basic rates in IEEE 802.11 format * (or NULL for no change) * @basic_rates_len: number of basic rates * @ap_isolate: do not forward packets between connected stations * (0 = no, 1 = yes, -1 = do not change) * @ht_opmode: HT Operation mode * (u16 = opmode, -1 = do not change) * @p2p_ctwindow: P2P CT Window (-1 = no change) * @p2p_opp_ps: P2P opportunistic PS (-1 = no change) */ struct bss_parameters { int use_cts_prot; int use_short_preamble; int use_short_slot_time; const u8 *basic_rates; u8 basic_rates_len; int ap_isolate; int ht_opmode; s8 p2p_ctwindow, p2p_opp_ps; }; /** * struct mesh_config - 802.11s mesh configuration * * These parameters can be changed while the mesh is active. * * @dot11MeshRetryTimeout: the initial retry timeout in millisecond units used * by the Mesh Peering Open message * @dot11MeshConfirmTimeout: the initial retry timeout in millisecond units * used by the Mesh Peering Open message * @dot11MeshHoldingTimeout: the confirm timeout in millisecond units used by * the mesh peering management to close a mesh peering * @dot11MeshMaxPeerLinks: the maximum number of peer links allowed on this * mesh interface * @dot11MeshMaxRetries: the maximum number of peer link open retries that can * be sent to establish a new peer link instance in a mesh * @dot11MeshTTL: the value of TTL field set at a source mesh STA * @element_ttl: the value of TTL field set at a mesh STA for path selection * elements * @auto_open_plinks: whether we should automatically open peer links when we * detect compatible mesh peers * @dot11MeshNbrOffsetMaxNeighbor: the maximum number of neighbors to * synchronize to for 11s default synchronization method * @dot11MeshHWMPmaxPREQretries: the number of action frames containing a PREQ * that an originator mesh STA can send to a particular path target * @path_refresh_time: how frequently to refresh mesh paths in milliseconds * @min_discovery_timeout: the minimum length of time to wait until giving up on * a path discovery in milliseconds * @dot11MeshHWMPactivePathTimeout: the time (in TUs) for which mesh STAs * receiving a PREQ shall consider the forwarding information from the * root to be valid. (TU = time unit) * @dot11MeshHWMPpreqMinInterval: the minimum interval of time (in TUs) during * which a mesh STA can send only one action frame containing a PREQ * element * @dot11MeshHWMPperrMinInterval: the minimum interval of time (in TUs) during * which a mesh STA can send only one Action frame containing a PERR * element * @dot11MeshHWMPnetDiameterTraversalTime: the interval of time (in TUs) that * it takes for an HWMP information element to propagate across the mesh * @dot11MeshHWMPRootMode: the configuration of a mesh STA as root mesh STA * @dot11MeshHWMPRannInterval: the interval of time (in TUs) between root * announcements are transmitted * @dot11MeshGateAnnouncementProtocol: whether to advertise that this mesh * station has access to a broader network beyond the MBSS. (This is * missnamed in draft 12.0: dot11MeshGateAnnouncementProtocol set to true * only means that the station will announce others it's a mesh gate, but * not necessarily using the gate announcement protocol. Still keeping the * same nomenclature to be in sync with the spec) * @dot11MeshForwarding: whether the Mesh STA is forwarding or non-forwarding * entity (default is TRUE - forwarding entity) * @rssi_threshold: the threshold for average signal strength of candidate * station to establish a peer link * @ht_opmode: mesh HT protection mode * * @dot11MeshHWMPactivePathToRootTimeout: The time (in TUs) for which mesh STAs * receiving a proactive PREQ shall consider the forwarding information to * the root mesh STA to be valid. * * @dot11MeshHWMProotInterval: The interval of time (in TUs) between proactive * PREQs are transmitted. * @dot11MeshHWMPconfirmationInterval: The minimum interval of time (in TUs) * during which a mesh STA can send only one Action frame containing * a PREQ element for root path confirmation. * @power_mode: The default mesh power save mode which will be the initial * setting for new peer links. * @dot11MeshAwakeWindowDuration: The duration in TUs the STA will remain awake * after transmitting its beacon. * @plink_timeout: If no tx activity is seen from a STA we've established * peering with for longer than this time (in seconds), then remove it * from the STA's list of peers. Default is 30 minutes. * @dot11MeshConnectedToMeshGate: if set to true, advertise that this STA is * connected to a mesh gate in mesh formation info. If false, the * value in mesh formation is determined by the presence of root paths * in the mesh path table * @dot11MeshNolearn: Try to avoid multi-hop path discovery (e.g. PREQ/PREP * for HWMP) if the destination is a direct neighbor. Note that this might * not be the optimal decision as a multi-hop route might be better. So * if using this setting you will likely also want to disable * dot11MeshForwarding and use another mesh routing protocol on top. */ struct mesh_config { u16 dot11MeshRetryTimeout; u16 dot11MeshConfirmTimeout; u16 dot11MeshHoldingTimeout; u16 dot11MeshMaxPeerLinks; u8 dot11MeshMaxRetries; u8 dot11MeshTTL; u8 element_ttl; bool auto_open_plinks; u32 dot11MeshNbrOffsetMaxNeighbor; u8 dot11MeshHWMPmaxPREQretries; u32 path_refresh_time; u16 min_discovery_timeout; u32 dot11MeshHWMPactivePathTimeout; u16 dot11MeshHWMPpreqMinInterval; u16 dot11MeshHWMPperrMinInterval; u16 dot11MeshHWMPnetDiameterTraversalTime; u8 dot11MeshHWMPRootMode; bool dot11MeshConnectedToMeshGate; bool dot11MeshConnectedToAuthServer; u16 dot11MeshHWMPRannInterval; bool dot11MeshGateAnnouncementProtocol; bool dot11MeshForwarding; s32 rssi_threshold; u16 ht_opmode; u32 dot11MeshHWMPactivePathToRootTimeout; u16 dot11MeshHWMProotInterval; u16 dot11MeshHWMPconfirmationInterval; enum nl80211_mesh_power_mode power_mode; u16 dot11MeshAwakeWindowDuration; u32 plink_timeout; bool dot11MeshNolearn; }; /** * struct mesh_setup - 802.11s mesh setup configuration * @chandef: defines the channel to use * @mesh_id: the mesh ID * @mesh_id_len: length of the mesh ID, at least 1 and at most 32 bytes * @sync_method: which synchronization method to use * @path_sel_proto: which path selection protocol to use * @path_metric: which metric to use * @auth_id: which authentication method this mesh is using * @ie: vendor information elements (optional) * @ie_len: length of vendor information elements * @is_authenticated: this mesh requires authentication * @is_secure: this mesh uses security * @user_mpm: userspace handles all MPM functions * @dtim_period: DTIM period to use * @beacon_interval: beacon interval to use * @mcast_rate: multicat rate for Mesh Node [6Mbps is the default for 802.11a] * @basic_rates: basic rates to use when creating the mesh * @beacon_rate: bitrate to be used for beacons * @userspace_handles_dfs: whether user space controls DFS operation, i.e. * changes the channel when a radar is detected. This is required * to operate on DFS channels. * @control_port_over_nl80211: TRUE if userspace expects to exchange control * port frames over NL80211 instead of the network interface. * * These parameters are fixed when the mesh is created. */ struct mesh_setup { struct cfg80211_chan_def chandef; const u8 *mesh_id; u8 mesh_id_len; u8 sync_method; u8 path_sel_proto; u8 path_metric; u8 auth_id; const u8 *ie; u8 ie_len; bool is_authenticated; bool is_secure; bool user_mpm; u8 dtim_period; u16 beacon_interval; int mcast_rate[NUM_NL80211_BANDS]; u32 basic_rates; struct cfg80211_bitrate_mask beacon_rate; bool userspace_handles_dfs; bool control_port_over_nl80211; }; /** * struct ocb_setup - 802.11p OCB mode setup configuration * @chandef: defines the channel to use * * These parameters are fixed when connecting to the network */ struct ocb_setup { struct cfg80211_chan_def chandef; }; /** * struct ieee80211_txq_params - TX queue parameters * @ac: AC identifier * @txop: Maximum burst time in units of 32 usecs, 0 meaning disabled * @cwmin: Minimum contention window [a value of the form 2^n-1 in the range * 1..32767] * @cwmax: Maximum contention window [a value of the form 2^n-1 in the range * 1..32767] * @aifs: Arbitration interframe space [0..255] */ struct ieee80211_txq_params { enum nl80211_ac ac; u16 txop; u16 cwmin; u16 cwmax; u8 aifs; }; /** * DOC: Scanning and BSS list handling * * The scanning process itself is fairly simple, but cfg80211 offers quite * a bit of helper functionality. To start a scan, the scan operation will * be invoked with a scan definition. This scan definition contains the * channels to scan, and the SSIDs to send probe requests for (including the * wildcard, if desired). A passive scan is indicated by having no SSIDs to * probe. Additionally, a scan request may contain extra information elements * that should be added to the probe request. The IEs are guaranteed to be * well-formed, and will not exceed the maximum length the driver advertised * in the wiphy structure. * * When scanning finds a BSS, cfg80211 needs to be notified of that, because * it is responsible for maintaining the BSS list; the driver should not * maintain a list itself. For this notification, various functions exist. * * Since drivers do not maintain a BSS list, there are also a number of * functions to search for a BSS and obtain information about it from the * BSS structure cfg80211 maintains. The BSS list is also made available * to userspace. */ /** * struct cfg80211_ssid - SSID description * @ssid: the SSID * @ssid_len: length of the ssid */ struct cfg80211_ssid { u8 ssid[IEEE80211_MAX_SSID_LEN]; u8 ssid_len; }; /** * struct cfg80211_scan_info - information about completed scan * @scan_start_tsf: scan start time in terms of the TSF of the BSS that the * wireless device that requested the scan is connected to. If this * information is not available, this field is left zero. * @tsf_bssid: the BSSID according to which %scan_start_tsf is set. * @aborted: set to true if the scan was aborted for any reason, * userspace will be notified of that */ struct cfg80211_scan_info { u64 scan_start_tsf; u8 tsf_bssid[ETH_ALEN] __aligned(2); bool aborted; }; /** * struct cfg80211_scan_6ghz_params - relevant for 6 GHz only * * @short_bssid: short ssid to scan for * @bssid: bssid to scan for * @channel_idx: idx of the channel in the channel array in the scan request * which the above info relvant to * @unsolicited_probe: the AP transmits unsolicited probe response every 20 TU * @short_ssid_valid: short_ssid is valid and can be used * @psc_no_listen: when set, and the channel is a PSC channel, no need to wait * 20 TUs before starting to send probe requests. */ struct cfg80211_scan_6ghz_params { u32 short_ssid; u32 channel_idx; u8 bssid[ETH_ALEN]; bool unsolicited_probe; bool short_ssid_valid; bool psc_no_listen; }; /** * struct cfg80211_scan_request - scan request description * * @ssids: SSIDs to scan for (active scan only) * @n_ssids: number of SSIDs * @channels: channels to scan on. * @n_channels: total number of channels to scan * @scan_width: channel width for scanning * @ie: optional information element(s) to add into Probe Request or %NULL * @ie_len: length of ie in octets * @duration: how long to listen on each channel, in TUs. If * %duration_mandatory is not set, this is the maximum dwell time and * the actual dwell time may be shorter. * @duration_mandatory: if set, the scan duration must be as specified by the * %duration field. * @flags: bit field of flags controlling operation * @rates: bitmap of rates to advertise for each band * @wiphy: the wiphy this was for * @scan_start: time (in jiffies) when the scan started * @wdev: the wireless device to scan for * @info: (internal) information about completed scan * @notified: (internal) scan request was notified as done or aborted * @no_cck: used to send probe requests at non CCK rate in 2GHz band * @mac_addr: MAC address used with randomisation * @mac_addr_mask: MAC address mask used with randomisation, bits that * are 0 in the mask should be randomised, bits that are 1 should * be taken from the @mac_addr * @scan_6ghz: relevant for split scan request only, * true if this is the second scan request * @n_6ghz_params: number of 6 GHz params * @scan_6ghz_params: 6 GHz params * @bssid: BSSID to scan for (most commonly, the wildcard BSSID) */ struct cfg80211_scan_request { struct cfg80211_ssid *ssids; int n_ssids; u32 n_channels; enum nl80211_bss_scan_width scan_width; const u8 *ie; size_t ie_len; u16 duration; bool duration_mandatory; u32 flags; u32 rates[NUM_NL80211_BANDS]; struct wireless_dev *wdev; u8 mac_addr[ETH_ALEN] __aligned(2); u8 mac_addr_mask[ETH_ALEN] __aligned(2); u8 bssid[ETH_ALEN] __aligned(2); /* internal */ struct wiphy *wiphy; unsigned long scan_start; struct cfg80211_scan_info info; bool notified; bool no_cck; bool scan_6ghz; u32 n_6ghz_params; struct cfg80211_scan_6ghz_params *scan_6ghz_params; /* keep last */ struct ieee80211_channel *channels[]; }; static inline void get_random_mask_addr(u8 *buf, const u8 *addr, const u8 *mask) { int i; get_random_bytes(buf, ETH_ALEN); for (i = 0; i < ETH_ALEN; i++) { buf[i] &= ~mask[i]; buf[i] |= addr[i] & mask[i]; } } /** * struct cfg80211_match_set - sets of attributes to match * * @ssid: SSID to be matched; may be zero-length in case of BSSID match * or no match (RSSI only) * @bssid: BSSID to be matched; may be all-zero BSSID in case of SSID match * or no match (RSSI only) * @rssi_thold: don't report scan results below this threshold (in s32 dBm) * @per_band_rssi_thold: Minimum rssi threshold for each band to be applied * for filtering out scan results received. Drivers advertize this support * of band specific rssi based filtering through the feature capability * %NL80211_EXT_FEATURE_SCHED_SCAN_BAND_SPECIFIC_RSSI_THOLD. These band * specific rssi thresholds take precedence over rssi_thold, if specified. * If not specified for any band, it will be assigned with rssi_thold of * corresponding matchset. */ struct cfg80211_match_set { struct cfg80211_ssid ssid; u8 bssid[ETH_ALEN]; s32 rssi_thold; s32 per_band_rssi_thold[NUM_NL80211_BANDS]; }; /** * struct cfg80211_sched_scan_plan - scan plan for scheduled scan * * @interval: interval between scheduled scan iterations. In seconds. * @iterations: number of scan iterations in this scan plan. Zero means * infinite loop. * The last scan plan will always have this parameter set to zero, * all other scan plans will have a finite number of iterations. */ struct cfg80211_sched_scan_plan { u32 interval; u32 iterations; }; /** * struct cfg80211_bss_select_adjust - BSS selection with RSSI adjustment. * * @band: band of BSS which should match for RSSI level adjustment. * @delta: value of RSSI level adjustment. */ struct cfg80211_bss_select_adjust { enum nl80211_band band; s8 delta; }; /** * struct cfg80211_sched_scan_request - scheduled scan request description * * @reqid: identifies this request. * @ssids: SSIDs to scan for (passed in the probe_reqs in active scans) * @n_ssids: number of SSIDs * @n_channels: total number of channels to scan * @scan_width: channel width for scanning * @ie: optional information element(s) to add into Probe Request or %NULL * @ie_len: length of ie in octets * @flags: bit field of flags controlling operation * @match_sets: sets of parameters to be matched for a scan result * entry to be considered valid and to be passed to the host * (others are filtered out). * If ommited, all results are passed. * @n_match_sets: number of match sets * @report_results: indicates that results were reported for this request * @wiphy: the wiphy this was for * @dev: the interface * @scan_start: start time of the scheduled scan * @channels: channels to scan * @min_rssi_thold: for drivers only supporting a single threshold, this * contains the minimum over all matchsets * @mac_addr: MAC address used with randomisation * @mac_addr_mask: MAC address mask used with randomisation, bits that * are 0 in the mask should be randomised, bits that are 1 should * be taken from the @mac_addr * @scan_plans: scan plans to be executed in this scheduled scan. Lowest * index must be executed first. * @n_scan_plans: number of scan plans, at least 1. * @rcu_head: RCU callback used to free the struct * @owner_nlportid: netlink portid of owner (if this should is a request * owned by a particular socket) * @nl_owner_dead: netlink owner socket was closed - this request be freed * @list: for keeping list of requests. * @delay: delay in seconds to use before starting the first scan * cycle. The driver may ignore this parameter and start * immediately (or at any other time), if this feature is not * supported. * @relative_rssi_set: Indicates whether @relative_rssi is set or not. * @relative_rssi: Relative RSSI threshold in dB to restrict scan result * reporting in connected state to cases where a matching BSS is determined * to have better or slightly worse RSSI than the current connected BSS. * The relative RSSI threshold values are ignored in disconnected state. * @rssi_adjust: delta dB of RSSI preference to be given to the BSSs that belong * to the specified band while deciding whether a better BSS is reported * using @relative_rssi. If delta is a negative number, the BSSs that * belong to the specified band will be penalized by delta dB in relative * comparisions. */ struct cfg80211_sched_scan_request { u64 reqid; struct cfg80211_ssid *ssids; int n_ssids; u32 n_channels; enum nl80211_bss_scan_width scan_width; const u8 *ie; size_t ie_len; u32 flags; struct cfg80211_match_set *match_sets; int n_match_sets; s32 min_rssi_thold; u32 delay; struct cfg80211_sched_scan_plan *scan_plans; int n_scan_plans; u8 mac_addr[ETH_ALEN] __aligned(2); u8 mac_addr_mask[ETH_ALEN] __aligned(2); bool relative_rssi_set; s8 relative_rssi; struct cfg80211_bss_select_adjust rssi_adjust; /* internal */ struct wiphy *wiphy; struct net_device *dev; unsigned long scan_start; bool report_results; struct rcu_head rcu_head; u32 owner_nlportid; bool nl_owner_dead; struct list_head list; /* keep last */ struct ieee80211_channel *channels[]; }; /** * enum cfg80211_signal_type - signal type * * @CFG80211_SIGNAL_TYPE_NONE: no signal strength information available * @CFG80211_SIGNAL_TYPE_MBM: signal strength in mBm (100*dBm) * @CFG80211_SIGNAL_TYPE_UNSPEC: signal strength, increasing from 0 through 100 */ enum cfg80211_signal_type { CFG80211_SIGNAL_TYPE_NONE, CFG80211_SIGNAL_TYPE_MBM, CFG80211_SIGNAL_TYPE_UNSPEC, }; /** * struct cfg80211_inform_bss - BSS inform data * @chan: channel the frame was received on * @scan_width: scan width that was used * @signal: signal strength value, according to the wiphy's * signal type * @boottime_ns: timestamp (CLOCK_BOOTTIME) when the information was * received; should match the time when the frame was actually * received by the device (not just by the host, in case it was * buffered on the device) and be accurate to about 10ms. * If the frame isn't buffered, just passing the return value of * ktime_get_boottime_ns() is likely appropriate. * @parent_tsf: the time at the start of reception of the first octet of the * timestamp field of the frame. The time is the TSF of the BSS specified * by %parent_bssid. * @parent_bssid: the BSS according to which %parent_tsf is set. This is set to * the BSS that requested the scan in which the beacon/probe was received. * @chains: bitmask for filled values in @chain_signal. * @chain_signal: per-chain signal strength of last received BSS in dBm. */ struct cfg80211_inform_bss { struct ieee80211_channel *chan; enum nl80211_bss_scan_width scan_width; s32 signal; u64 boottime_ns; u64 parent_tsf; u8 parent_bssid[ETH_ALEN] __aligned(2); u8 chains; s8 chain_signal[IEEE80211_MAX_CHAINS]; }; /** * struct cfg80211_bss_ies - BSS entry IE data * @tsf: TSF contained in the frame that carried these IEs * @rcu_head: internal use, for freeing * @len: length of the IEs * @from_beacon: these IEs are known to come from a beacon * @data: IE data */ struct cfg80211_bss_ies { u64 tsf; struct rcu_head rcu_head; int len; bool from_beacon; u8 data[]; }; /** * struct cfg80211_bss - BSS description * * This structure describes a BSS (which may also be a mesh network) * for use in scan results and similar. * * @channel: channel this BSS is on * @scan_width: width of the control channel * @bssid: BSSID of the BSS * @beacon_interval: the beacon interval as from the frame * @capability: the capability field in host byte order * @ies: the information elements (Note that there is no guarantee that these * are well-formed!); this is a pointer to either the beacon_ies or * proberesp_ies depending on whether Probe Response frame has been * received. It is always non-%NULL. * @beacon_ies: the information elements from the last Beacon frame * (implementation note: if @hidden_beacon_bss is set this struct doesn't * own the beacon_ies, but they're just pointers to the ones from the * @hidden_beacon_bss struct) * @proberesp_ies: the information elements from the last Probe Response frame * @hidden_beacon_bss: in case this BSS struct represents a probe response from * a BSS that hides the SSID in its beacon, this points to the BSS struct * that holds the beacon data. @beacon_ies is still valid, of course, and * points to the same data as hidden_beacon_bss->beacon_ies in that case. * @transmitted_bss: pointer to the transmitted BSS, if this is a * non-transmitted one (multi-BSSID support) * @nontrans_list: list of non-transmitted BSS, if this is a transmitted one * (multi-BSSID support) * @signal: signal strength value (type depends on the wiphy's signal_type) * @chains: bitmask for filled values in @chain_signal. * @chain_signal: per-chain signal strength of last received BSS in dBm. * @bssid_index: index in the multiple BSS set * @max_bssid_indicator: max number of members in the BSS set * @priv: private area for driver use, has at least wiphy->bss_priv_size bytes */ struct cfg80211_bss { struct ieee80211_channel *channel; enum nl80211_bss_scan_width scan_width; const struct cfg80211_bss_ies __rcu *ies; const struct cfg80211_bss_ies __rcu *beacon_ies; const struct cfg80211_bss_ies __rcu *proberesp_ies; struct cfg80211_bss *hidden_beacon_bss; struct cfg80211_bss *transmitted_bss; struct list_head nontrans_list; s32 signal; u16 beacon_interval; u16 capability; u8 bssid[ETH_ALEN]; u8 chains; s8 chain_signal[IEEE80211_MAX_CHAINS]; u8 bssid_index; u8 max_bssid_indicator; u8 priv[] __aligned(sizeof(void *)); }; /** * ieee80211_bss_get_elem - find element with given ID * @bss: the bss to search * @id: the element ID * * Note that the return value is an RCU-protected pointer, so * rcu_read_lock() must be held when calling this function. * Return: %NULL if not found. */ const struct element *ieee80211_bss_get_elem(struct cfg80211_bss *bss, u8 id); /** * ieee80211_bss_get_ie - find IE with given ID * @bss: the bss to search * @id: the element ID * * Note that the return value is an RCU-protected pointer, so * rcu_read_lock() must be held when calling this function. * Return: %NULL if not found. */ static inline const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 id) { return (void *)ieee80211_bss_get_elem(bss, id); } /** * struct cfg80211_auth_request - Authentication request data * * This structure provides information needed to complete IEEE 802.11 * authentication. * * @bss: The BSS to authenticate with, the callee must obtain a reference * to it if it needs to keep it. * @auth_type: Authentication type (algorithm) * @ie: Extra IEs to add to Authentication frame or %NULL * @ie_len: Length of ie buffer in octets * @key_len: length of WEP key for shared key authentication * @key_idx: index of WEP key for shared key authentication * @key: WEP key for shared key authentication * @auth_data: Fields and elements in Authentication frames. This contains * the authentication frame body (non-IE and IE data), excluding the * Authentication algorithm number, i.e., starting at the Authentication * transaction sequence number field. * @auth_data_len: Length of auth_data buffer in octets */ struct cfg80211_auth_request { struct cfg80211_bss *bss; const u8 *ie; size_t ie_len; enum nl80211_auth_type auth_type; const u8 *key; u8 key_len, key_idx; const u8 *auth_data; size_t auth_data_len; }; /** * enum cfg80211_assoc_req_flags - Over-ride default behaviour in association. * * @ASSOC_REQ_DISABLE_HT: Disable HT (802.11n) * @ASSOC_REQ_DISABLE_VHT: Disable VHT * @ASSOC_REQ_USE_RRM: Declare RRM capability in this association * @CONNECT_REQ_EXTERNAL_AUTH_SUPPORT: User space indicates external * authentication capability. Drivers can offload authentication to * userspace if this flag is set. Only applicable for cfg80211_connect() * request (connect callback). */ enum cfg80211_assoc_req_flags { ASSOC_REQ_DISABLE_HT = BIT(0), ASSOC_REQ_DISABLE_VHT = BIT(1), ASSOC_REQ_USE_RRM = BIT(2), CONNECT_REQ_EXTERNAL_AUTH_SUPPORT = BIT(3), }; /** * struct cfg80211_assoc_request - (Re)Association request data * * This structure provides information needed to complete IEEE 802.11 * (re)association. * @bss: The BSS to associate with. If the call is successful the driver is * given a reference that it must give back to cfg80211_send_rx_assoc() * or to cfg80211_assoc_timeout(). To ensure proper refcounting, new * association requests while already associating must be rejected. * @ie: Extra IEs to add to (Re)Association Request frame or %NULL * @ie_len: Length of ie buffer in octets * @use_mfp: Use management frame protection (IEEE 802.11w) in this association * @crypto: crypto settings * @prev_bssid: previous BSSID, if not %NULL use reassociate frame. This is used * to indicate a request to reassociate within the ESS instead of a request * do the initial association with the ESS. When included, this is set to * the BSSID of the current association, i.e., to the value that is * included in the Current AP address field of the Reassociation Request * frame. * @flags: See &enum cfg80211_assoc_req_flags * @ht_capa: HT Capabilities over-rides. Values set in ht_capa_mask * will be used in ht_capa. Un-supported values will be ignored. * @ht_capa_mask: The bits of ht_capa which are to be used. * @vht_capa: VHT capability override * @vht_capa_mask: VHT capability mask indicating which fields to use * @fils_kek: FILS KEK for protecting (Re)Association Request/Response frame or * %NULL if FILS is not used. * @fils_kek_len: Length of fils_kek in octets * @fils_nonces: FILS nonces (part of AAD) for protecting (Re)Association * Request/Response frame or %NULL if FILS is not used. This field starts * with 16 octets of STA Nonce followed by 16 octets of AP Nonce. * @s1g_capa: S1G capability override * @s1g_capa_mask: S1G capability override mask */ struct cfg80211_assoc_request { struct cfg80211_bss *bss; const u8 *ie, *prev_bssid; size_t ie_len; struct cfg80211_crypto_settings crypto; bool use_mfp; u32 flags; struct ieee80211_ht_cap ht_capa; struct ieee80211_ht_cap ht_capa_mask; struct ieee80211_vht_cap vht_capa, vht_capa_mask; const u8 *fils_kek; size_t fils_kek_len; const u8 *fils_nonces; struct ieee80211_s1g_cap s1g_capa, s1g_capa_mask; }; /** * struct cfg80211_deauth_request - Deauthentication request data * * This structure provides information needed to complete IEEE 802.11 * deauthentication. * * @bssid: the BSSID of the BSS to deauthenticate from * @ie: Extra IEs to add to Deauthentication frame or %NULL * @ie_len: Length of ie buffer in octets * @reason_code: The reason code for the deauthentication * @local_state_change: if set, change local state only and * do not set a deauth frame */ struct cfg80211_deauth_request { const u8 *bssid; const u8 *ie; size_t ie_len; u16 reason_code; bool local_state_change; }; /** * struct cfg80211_disassoc_request - Disassociation request data * * This structure provides information needed to complete IEEE 802.11 * disassociation. * * @bss: the BSS to disassociate from * @ie: Extra IEs to add to Disassociation frame or %NULL * @ie_len: Length of ie buffer in octets * @reason_code: The reason code for the disassociation * @local_state_change: This is a request for a local state only, i.e., no * Disassociation frame is to be transmitted. */ struct cfg80211_disassoc_request { struct cfg80211_bss *bss; const u8 *ie; size_t ie_len; u16 reason_code; bool local_state_change; }; /** * struct cfg80211_ibss_params - IBSS parameters * * This structure defines the IBSS parameters for the join_ibss() * method. * * @ssid: The SSID, will always be non-null. * @ssid_len: The length of the SSID, will always be non-zero. * @bssid: Fixed BSSID requested, maybe be %NULL, if set do not * search for IBSSs with a different BSSID. * @chandef: defines the channel to use if no other IBSS to join can be found * @channel_fixed: The channel should be fixed -- do not search for * IBSSs to join on other channels. * @ie: information element(s) to include in the beacon * @ie_len: length of that * @beacon_interval: beacon interval to use * @privacy: this is a protected network, keys will be configured * after joining * @control_port: whether user space controls IEEE 802.1X port, i.e., * sets/clears %NL80211_STA_FLAG_AUTHORIZED. If true, the driver is * required to assume that the port is unauthorized until authorized by * user space. Otherwise, port is marked authorized by default. * @control_port_over_nl80211: TRUE if userspace expects to exchange control * port frames over NL80211 instead of the network interface. * @userspace_handles_dfs: whether user space controls DFS operation, i.e. * changes the channel when a radar is detected. This is required * to operate on DFS channels. * @basic_rates: bitmap of basic rates to use when creating the IBSS * @mcast_rate: per-band multicast rate index + 1 (0: disabled) * @ht_capa: HT Capabilities over-rides. Values set in ht_capa_mask * will be used in ht_capa. Un-supported values will be ignored. * @ht_capa_mask: The bits of ht_capa which are to be used. * @wep_keys: static WEP keys, if not NULL points to an array of * CFG80211_MAX_WEP_KEYS WEP keys * @wep_tx_key: key index (0..3) of the default TX static WEP key */ struct cfg80211_ibss_params { const u8 *ssid; const u8 *bssid; struct cfg80211_chan_def chandef; const u8 *ie; u8 ssid_len, ie_len; u16 beacon_interval; u32 basic_rates; bool channel_fixed; bool privacy; bool control_port; bool control_port_over_nl80211; bool userspace_handles_dfs; int mcast_rate[NUM_NL80211_BANDS]; struct ieee80211_ht_cap ht_capa; struct ieee80211_ht_cap ht_capa_mask; struct key_params *wep_keys; int wep_tx_key; }; /** * struct cfg80211_bss_selection - connection parameters for BSS selection. * * @behaviour: requested BSS selection behaviour. * @param: parameters for requestion behaviour. * @band_pref: preferred band for %NL80211_BSS_SELECT_ATTR_BAND_PREF. * @adjust: parameters for %NL80211_BSS_SELECT_ATTR_RSSI_ADJUST. */ struct cfg80211_bss_selection { enum nl80211_bss_select_attr behaviour; union { enum nl80211_band band_pref; struct cfg80211_bss_select_adjust adjust; } param; }; /** * struct cfg80211_connect_params - Connection parameters * * This structure provides information needed to complete IEEE 802.11 * authentication and association. * * @channel: The channel to use or %NULL if not specified (auto-select based * on scan results) * @channel_hint: The channel of the recommended BSS for initial connection or * %NULL if not specified * @bssid: The AP BSSID or %NULL if not specified (auto-select based on scan * results) * @bssid_hint: The recommended AP BSSID for initial connection to the BSS or * %NULL if not specified. Unlike the @bssid parameter, the driver is * allowed to ignore this @bssid_hint if it has knowledge of a better BSS * to use. * @ssid: SSID * @ssid_len: Length of ssid in octets * @auth_type: Authentication type (algorithm) * @ie: IEs for association request * @ie_len: Length of assoc_ie in octets * @privacy: indicates whether privacy-enabled APs should be used * @mfp: indicate whether management frame protection is used * @crypto: crypto settings * @key_len: length of WEP key for shared key authentication * @key_idx: index of WEP key for shared key authentication * @key: WEP key for shared key authentication * @flags: See &enum cfg80211_assoc_req_flags * @bg_scan_period: Background scan period in seconds * or -1 to indicate that default value is to be used. * @ht_capa: HT Capabilities over-rides. Values set in ht_capa_mask * will be used in ht_capa. Un-supported values will be ignored. * @ht_capa_mask: The bits of ht_capa which are to be used. * @vht_capa: VHT Capability overrides * @vht_capa_mask: The bits of vht_capa which are to be used. * @pbss: if set, connect to a PCP instead of AP. Valid for DMG * networks. * @bss_select: criteria to be used for BSS selection. * @prev_bssid: previous BSSID, if not %NULL use reassociate frame. This is used * to indicate a request to reassociate within the ESS instead of a request * do the initial association with the ESS. When included, this is set to * the BSSID of the current association, i.e., to the value that is * included in the Current AP address field of the Reassociation Request * frame. * @fils_erp_username: EAP re-authentication protocol (ERP) username part of the * NAI or %NULL if not specified. This is used to construct FILS wrapped * data IE. * @fils_erp_username_len: Length of @fils_erp_username in octets. * @fils_erp_realm: EAP re-authentication protocol (ERP) realm part of NAI or * %NULL if not specified. This specifies the domain name of ER server and * is used to construct FILS wrapped data IE. * @fils_erp_realm_len: Length of @fils_erp_realm in octets. * @fils_erp_next_seq_num: The next sequence number to use in the FILS ERP * messages. This is also used to construct FILS wrapped data IE. * @fils_erp_rrk: ERP re-authentication Root Key (rRK) used to derive additional * keys in FILS or %NULL if not specified. * @fils_erp_rrk_len: Length of @fils_erp_rrk in octets. * @want_1x: indicates user-space supports and wants to use 802.1X driver * offload of 4-way handshake. * @edmg: define the EDMG channels. * This may specify multiple channels and bonding options for the driver * to choose from, based on BSS configuration. */ struct cfg80211_connect_params { struct ieee80211_channel *channel; struct ieee80211_channel *channel_hint; const u8 *bssid; const u8 *bssid_hint; const u8 *ssid; size_t ssid_len; enum nl80211_auth_type auth_type; const u8 *ie; size_t ie_len; bool privacy; enum nl80211_mfp mfp; struct cfg80211_crypto_settings crypto; const u8 *key; u8 key_len, key_idx; u32 flags; int bg_scan_period; struct ieee80211_ht_cap ht_capa; struct ieee80211_ht_cap ht_capa_mask; struct ieee80211_vht_cap vht_capa; struct ieee80211_vht_cap vht_capa_mask; bool pbss; struct cfg80211_bss_selection bss_select; const u8 *prev_bssid; const u8 *fils_erp_username; size_t fils_erp_username_len; const u8 *fils_erp_realm; size_t fils_erp_realm_len; u16 fils_erp_next_seq_num; const u8 *fils_erp_rrk; size_t fils_erp_rrk_len; bool want_1x; struct ieee80211_edmg edmg; }; /** * enum cfg80211_connect_params_changed - Connection parameters being updated * * This enum provides information of all connect parameters that * have to be updated as part of update_connect_params() call. * * @UPDATE_ASSOC_IES: Indicates whether association request IEs are updated * @UPDATE_FILS_ERP_INFO: Indicates that FILS connection parameters (realm, * username, erp sequence number and rrk) are updated * @UPDATE_AUTH_TYPE: Indicates that authentication type is updated */ enum cfg80211_connect_params_changed { UPDATE_ASSOC_IES = BIT(0), UPDATE_FILS_ERP_INFO = BIT(1), UPDATE_AUTH_TYPE = BIT(2), }; /** * enum wiphy_params_flags - set_wiphy_params bitfield values * @WIPHY_PARAM_RETRY_SHORT: wiphy->retry_short has changed * @WIPHY_PARAM_RETRY_LONG: wiphy->retry_long has changed * @WIPHY_PARAM_FRAG_THRESHOLD: wiphy->frag_threshold has changed * @WIPHY_PARAM_RTS_THRESHOLD: wiphy->rts_threshold has changed * @WIPHY_PARAM_COVERAGE_CLASS: coverage class changed * @WIPHY_PARAM_DYN_ACK: dynack has been enabled * @WIPHY_PARAM_TXQ_LIMIT: TXQ packet limit has been changed * @WIPHY_PARAM_TXQ_MEMORY_LIMIT: TXQ memory limit has been changed * @WIPHY_PARAM_TXQ_QUANTUM: TXQ scheduler quantum */ enum wiphy_params_flags { WIPHY_PARAM_RETRY_SHORT = 1 << 0, WIPHY_PARAM_RETRY_LONG = 1 << 1, WIPHY_PARAM_FRAG_THRESHOLD = 1 << 2, WIPHY_PARAM_RTS_THRESHOLD = 1 << 3, WIPHY_PARAM_COVERAGE_CLASS = 1 << 4, WIPHY_PARAM_DYN_ACK = 1 << 5, WIPHY_PARAM_TXQ_LIMIT = 1 << 6, WIPHY_PARAM_TXQ_MEMORY_LIMIT = 1 << 7, WIPHY_PARAM_TXQ_QUANTUM = 1 << 8, }; #define IEEE80211_DEFAULT_AIRTIME_WEIGHT 256 /* The per TXQ device queue limit in airtime */ #define IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L 5000 #define IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H 12000 /* The per interface airtime threshold to switch to lower queue limit */ #define IEEE80211_AQL_THRESHOLD 24000 /** * struct cfg80211_pmksa - PMK Security Association * * This structure is passed to the set/del_pmksa() method for PMKSA * caching. * * @bssid: The AP's BSSID (may be %NULL). * @pmkid: The identifier to refer a PMKSA. * @pmk: The PMK for the PMKSA identified by @pmkid. This is used for key * derivation by a FILS STA. Otherwise, %NULL. * @pmk_len: Length of the @pmk. The length of @pmk can differ depending on * the hash algorithm used to generate this. * @ssid: SSID to specify the ESS within which a PMKSA is valid when using FILS * cache identifier (may be %NULL). * @ssid_len: Length of the @ssid in octets. * @cache_id: 2-octet cache identifier advertized by a FILS AP identifying the * scope of PMKSA. This is valid only if @ssid_len is non-zero (may be * %NULL). * @pmk_lifetime: Maximum lifetime for PMKSA in seconds * (dot11RSNAConfigPMKLifetime) or 0 if not specified. * The configured PMKSA must not be used for PMKSA caching after * expiration and any keys derived from this PMK become invalid on * expiration, i.e., the current association must be dropped if the PMK * used for it expires. * @pmk_reauth_threshold: Threshold time for reauthentication (percentage of * PMK lifetime, dot11RSNAConfigPMKReauthThreshold) or 0 if not specified. * Drivers are expected to trigger a full authentication instead of using * this PMKSA for caching when reassociating to a new BSS after this * threshold to generate a new PMK before the current one expires. */ struct cfg80211_pmksa { const u8 *bssid; const u8 *pmkid; const u8 *pmk; size_t pmk_len; const u8 *ssid; size_t ssid_len; const u8 *cache_id; u32 pmk_lifetime; u8 pmk_reauth_threshold; }; /** * struct cfg80211_pkt_pattern - packet pattern * @mask: bitmask where to match pattern and where to ignore bytes, * one bit per byte, in same format as nl80211 * @pattern: bytes to match where bitmask is 1 * @pattern_len: length of pattern (in bytes) * @pkt_offset: packet offset (in bytes) * * Internal note: @mask and @pattern are allocated in one chunk of * memory, free @mask only! */ struct cfg80211_pkt_pattern { const u8 *mask, *pattern; int pattern_len; int pkt_offset; }; /** * struct cfg80211_wowlan_tcp - TCP connection parameters * * @sock: (internal) socket for source port allocation * @src: source IP address * @dst: destination IP address * @dst_mac: destination MAC address * @src_port: source port * @dst_port: destination port * @payload_len: data payload length * @payload: data payload buffer * @payload_seq: payload sequence stamping configuration * @data_interval: interval at which to send data packets * @wake_len: wakeup payload match length * @wake_data: wakeup payload match data * @wake_mask: wakeup payload match mask * @tokens_size: length of the tokens buffer * @payload_tok: payload token usage configuration */ struct cfg80211_wowlan_tcp { struct socket *sock; __be32 src, dst; u16 src_port, dst_port; u8 dst_mac[ETH_ALEN]; int payload_len; const u8 *payload; struct nl80211_wowlan_tcp_data_seq payload_seq; u32 data_interval; u32 wake_len; const u8 *wake_data, *wake_mask; u32 tokens_size; /* must be last, variable member */ struct nl80211_wowlan_tcp_data_token payload_tok; }; /** * struct cfg80211_wowlan - Wake on Wireless-LAN support info * * This structure defines the enabled WoWLAN triggers for the device. * @any: wake up on any activity -- special trigger if device continues * operating as normal during suspend * @disconnect: wake up if getting disconnected * @magic_pkt: wake up on receiving magic packet * @patterns: wake up on receiving packet matching a pattern * @n_patterns: number of patterns * @gtk_rekey_failure: wake up on GTK rekey failure * @eap_identity_req: wake up on EAP identity request packet * @four_way_handshake: wake up on 4-way handshake * @rfkill_release: wake up when rfkill is released * @tcp: TCP connection establishment/wakeup parameters, see nl80211.h. * NULL if not configured. * @nd_config: configuration for the scan to be used for net detect wake. */ struct cfg80211_wowlan { bool any, disconnect, magic_pkt, gtk_rekey_failure, eap_identity_req, four_way_handshake, rfkill_release; struct cfg80211_pkt_pattern *patterns; struct cfg80211_wowlan_tcp *tcp; int n_patterns; struct cfg80211_sched_scan_request *nd_config; }; /** * struct cfg80211_coalesce_rules - Coalesce rule parameters * * This structure defines coalesce rule for the device. * @delay: maximum coalescing delay in msecs. * @condition: condition for packet coalescence. * see &enum nl80211_coalesce_condition. * @patterns: array of packet patterns * @n_patterns: number of patterns */ struct cfg80211_coalesce_rules { int delay; enum nl80211_coalesce_condition condition; struct cfg80211_pkt_pattern *patterns; int n_patterns; }; /** * struct cfg80211_coalesce - Packet coalescing settings * * This structure defines coalescing settings. * @rules: array of coalesce rules * @n_rules: number of rules */ struct cfg80211_coalesce { struct cfg80211_coalesce_rules *rules; int n_rules; }; /** * struct cfg80211_wowlan_nd_match - information about the match * * @ssid: SSID of the match that triggered the wake up * @n_channels: Number of channels where the match occurred. This * value may be zero if the driver can't report the channels. * @channels: center frequencies of the channels where a match * occurred (in MHz) */ struct cfg80211_wowlan_nd_match { struct cfg80211_ssid ssid; int n_channels; u32 channels[]; }; /** * struct cfg80211_wowlan_nd_info - net detect wake up information * * @n_matches: Number of match information instances provided in * @matches. This value may be zero if the driver can't provide * match information. * @matches: Array of pointers to matches containing information about * the matches that triggered the wake up. */ struct cfg80211_wowlan_nd_info { int n_matches; struct cfg80211_wowlan_nd_match *matches[]; }; /** * struct cfg80211_wowlan_wakeup - wakeup report * @disconnect: woke up by getting disconnected * @magic_pkt: woke up by receiving magic packet * @gtk_rekey_failure: woke up by GTK rekey failure * @eap_identity_req: woke up by EAP identity request packet * @four_way_handshake: woke up by 4-way handshake * @rfkill_release: woke up by rfkill being released * @pattern_idx: pattern that caused wakeup, -1 if not due to pattern * @packet_present_len: copied wakeup packet data * @packet_len: original wakeup packet length * @packet: The packet causing the wakeup, if any. * @packet_80211: For pattern match, magic packet and other data * frame triggers an 802.3 frame should be reported, for * disconnect due to deauth 802.11 frame. This indicates which * it is. * @tcp_match: TCP wakeup packet received * @tcp_connlost: TCP connection lost or failed to establish * @tcp_nomoretokens: TCP data ran out of tokens * @net_detect: if not %NULL, woke up because of net detect */ struct cfg80211_wowlan_wakeup { bool disconnect, magic_pkt, gtk_rekey_failure, eap_identity_req, four_way_handshake, rfkill_release, packet_80211, tcp_match, tcp_connlost, tcp_nomoretokens; s32 pattern_idx; u32 packet_present_len, packet_len; const void *packet; struct cfg80211_wowlan_nd_info *net_detect; }; /** * struct cfg80211_gtk_rekey_data - rekey data * @kek: key encryption key (@kek_len bytes) * @kck: key confirmation key (@kck_len bytes) * @replay_ctr: replay counter (NL80211_REPLAY_CTR_LEN bytes) * @kek_len: length of kek * @kck_len length of kck * @akm: akm (oui, id) */ struct cfg80211_gtk_rekey_data { const u8 *kek, *kck, *replay_ctr; u32 akm; u8 kek_len, kck_len; }; /** * struct cfg80211_update_ft_ies_params - FT IE Information * * This structure provides information needed to update the fast transition IE * * @md: The Mobility Domain ID, 2 Octet value * @ie: Fast Transition IEs * @ie_len: Length of ft_ie in octets */ struct cfg80211_update_ft_ies_params { u16 md; const u8 *ie; size_t ie_len; }; /** * struct cfg80211_mgmt_tx_params - mgmt tx parameters * * This structure provides information needed to transmit a mgmt frame * * @chan: channel to use * @offchan: indicates wether off channel operation is required * @wait: duration for ROC * @buf: buffer to transmit * @len: buffer length * @no_cck: don't use cck rates for this frame * @dont_wait_for_ack: tells the low level not to wait for an ack * @n_csa_offsets: length of csa_offsets array * @csa_offsets: array of all the csa offsets in the frame */ struct cfg80211_mgmt_tx_params { struct ieee80211_channel *chan; bool offchan; unsigned int wait; const u8 *buf; size_t len; bool no_cck; bool dont_wait_for_ack; int n_csa_offsets; const u16 *csa_offsets; }; /** * struct cfg80211_dscp_exception - DSCP exception * * @dscp: DSCP value that does not adhere to the user priority range definition * @up: user priority value to which the corresponding DSCP value belongs */ struct cfg80211_dscp_exception { u8 dscp; u8 up; }; /** * struct cfg80211_dscp_range - DSCP range definition for user priority * * @low: lowest DSCP value of this user priority range, inclusive * @high: highest DSCP value of this user priority range, inclusive */ struct cfg80211_dscp_range { u8 low; u8 high; }; /* QoS Map Set element length defined in IEEE Std 802.11-2012, 8.4.2.97 */ #define IEEE80211_QOS_MAP_MAX_EX 21 #define IEEE80211_QOS_MAP_LEN_MIN 16 #define IEEE80211_QOS_MAP_LEN_MAX \ (IEEE80211_QOS_MAP_LEN_MIN + 2 * IEEE80211_QOS_MAP_MAX_EX) /** * struct cfg80211_qos_map - QoS Map Information * * This struct defines the Interworking QoS map setting for DSCP values * * @num_des: number of DSCP exceptions (0..21) * @dscp_exception: optionally up to maximum of 21 DSCP exceptions from * the user priority DSCP range definition * @up: DSCP range definition for a particular user priority */ struct cfg80211_qos_map { u8 num_des; struct cfg80211_dscp_exception dscp_exception[IEEE80211_QOS_MAP_MAX_EX]; struct cfg80211_dscp_range up[8]; }; /** * struct cfg80211_nan_conf - NAN configuration * * This struct defines NAN configuration parameters * * @master_pref: master preference (1 - 255) * @bands: operating bands, a bitmap of &enum nl80211_band values. * For instance, for NL80211_BAND_2GHZ, bit 0 would be set * (i.e. BIT(NL80211_BAND_2GHZ)). */ struct cfg80211_nan_conf { u8 master_pref; u8 bands; }; /** * enum cfg80211_nan_conf_changes - indicates changed fields in NAN * configuration * * @CFG80211_NAN_CONF_CHANGED_PREF: master preference * @CFG80211_NAN_CONF_CHANGED_BANDS: operating bands */ enum cfg80211_nan_conf_changes { CFG80211_NAN_CONF_CHANGED_PREF = BIT(0), CFG80211_NAN_CONF_CHANGED_BANDS = BIT(1), }; /** * struct cfg80211_nan_func_filter - a NAN function Rx / Tx filter * * @filter: the content of the filter * @len: the length of the filter */ struct cfg80211_nan_func_filter { const u8 *filter; u8 len; }; /** * struct cfg80211_nan_func - a NAN function * * @type: &enum nl80211_nan_function_type * @service_id: the service ID of the function * @publish_type: &nl80211_nan_publish_type * @close_range: if true, the range should be limited. Threshold is * implementation specific. * @publish_bcast: if true, the solicited publish should be broadcasted * @subscribe_active: if true, the subscribe is active * @followup_id: the instance ID for follow up * @followup_reqid: the requestor instance ID for follow up * @followup_dest: MAC address of the recipient of the follow up * @ttl: time to live counter in DW. * @serv_spec_info: Service Specific Info * @serv_spec_info_len: Service Specific Info length * @srf_include: if true, SRF is inclusive * @srf_bf: Bloom Filter * @srf_bf_len: Bloom Filter length * @srf_bf_idx: Bloom Filter index * @srf_macs: SRF MAC addresses * @srf_num_macs: number of MAC addresses in SRF * @rx_filters: rx filters that are matched with corresponding peer's tx_filter * @tx_filters: filters that should be transmitted in the SDF. * @num_rx_filters: length of &rx_filters. * @num_tx_filters: length of &tx_filters. * @instance_id: driver allocated id of the function. * @cookie: unique NAN function identifier. */ struct cfg80211_nan_func { enum nl80211_nan_function_type type; u8 service_id[NL80211_NAN_FUNC_SERVICE_ID_LEN]; u8 publish_type; bool close_range; bool publish_bcast; bool subscribe_active; u8 followup_id; u8 followup_reqid; struct mac_address followup_dest; u32 ttl; const u8 *serv_spec_info; u8 serv_spec_info_len; bool srf_include; const u8 *srf_bf; u8 srf_bf_len; u8 srf_bf_idx; struct mac_address *srf_macs; int srf_num_macs; struct cfg80211_nan_func_filter *rx_filters; struct cfg80211_nan_func_filter *tx_filters; u8 num_tx_filters; u8 num_rx_filters; u8 instance_id; u64 cookie; }; /** * struct cfg80211_pmk_conf - PMK configuration * * @aa: authenticator address * @pmk_len: PMK length in bytes. * @pmk: the PMK material * @pmk_r0_name: PMK-R0 Name. NULL if not applicable (i.e., the PMK * is not PMK-R0). When pmk_r0_name is not NULL, the pmk field * holds PMK-R0. */ struct cfg80211_pmk_conf { const u8 *aa; u8 pmk_len; const u8 *pmk; const u8 *pmk_r0_name; }; /** * struct cfg80211_external_auth_params - Trigger External authentication. * * Commonly used across the external auth request and event interfaces. * * @action: action type / trigger for external authentication. Only significant * for the authentication request event interface (driver to user space). * @bssid: BSSID of the peer with which the authentication has * to happen. Used by both the authentication request event and * authentication response command interface. * @ssid: SSID of the AP. Used by both the authentication request event and * authentication response command interface. * @key_mgmt_suite: AKM suite of the respective authentication. Used by the * authentication request event interface. * @status: status code, %WLAN_STATUS_SUCCESS for successful authentication, * use %WLAN_STATUS_UNSPECIFIED_FAILURE if user space cannot give you * the real status code for failures. Used only for the authentication * response command interface (user space to driver). * @pmkid: The identifier to refer a PMKSA. */ struct cfg80211_external_auth_params { enum nl80211_external_auth_action action; u8 bssid[ETH_ALEN] __aligned(2); struct cfg80211_ssid ssid; unsigned int key_mgmt_suite; u16 status; const u8 *pmkid; }; /** * struct cfg80211_ftm_responder_stats - FTM responder statistics * * @filled: bitflag of flags using the bits of &enum nl80211_ftm_stats to * indicate the relevant values in this struct for them * @success_num: number of FTM sessions in which all frames were successfully * answered * @partial_num: number of FTM sessions in which part of frames were * successfully answered * @failed_num: number of failed FTM sessions * @asap_num: number of ASAP FTM sessions * @non_asap_num: number of non-ASAP FTM sessions * @total_duration_ms: total sessions durations - gives an indication * of how much time the responder was busy * @unknown_triggers_num: number of unknown FTM triggers - triggers from * initiators that didn't finish successfully the negotiation phase with * the responder * @reschedule_requests_num: number of FTM reschedule requests - initiator asks * for a new scheduling although it already has scheduled FTM slot * @out_of_window_triggers_num: total FTM triggers out of scheduled window */ struct cfg80211_ftm_responder_stats { u32 filled; u32 success_num; u32 partial_num; u32 failed_num; u32 asap_num; u32 non_asap_num; u64 total_duration_ms; u32 unknown_triggers_num; u32 reschedule_requests_num; u32 out_of_window_triggers_num; }; /** * struct cfg80211_pmsr_ftm_result - FTM result * @failure_reason: if this measurement failed (PMSR status is * %NL80211_PMSR_STATUS_FAILURE), this gives a more precise * reason than just "failure" * @burst_index: if reporting partial results, this is the index * in [0 .. num_bursts-1] of the burst that's being reported * @num_ftmr_attempts: number of FTM request frames transmitted * @num_ftmr_successes: number of FTM request frames acked * @busy_retry_time: if failure_reason is %NL80211_PMSR_FTM_FAILURE_PEER_BUSY, * fill this to indicate in how many seconds a retry is deemed possible * by the responder * @num_bursts_exp: actual number of bursts exponent negotiated * @burst_duration: actual burst duration negotiated * @ftms_per_burst: actual FTMs per burst negotiated * @lci_len: length of LCI information (if present) * @civicloc_len: length of civic location information (if present) * @lci: LCI data (may be %NULL) * @civicloc: civic location data (may be %NULL) * @rssi_avg: average RSSI over FTM action frames reported * @rssi_spread: spread of the RSSI over FTM action frames reported * @tx_rate: bitrate for transmitted FTM action frame response * @rx_rate: bitrate of received FTM action frame * @rtt_avg: average of RTTs measured (must have either this or @dist_avg) * @rtt_variance: variance of RTTs measured (note that standard deviation is * the square root of the variance) * @rtt_spread: spread of the RTTs measured * @dist_avg: average of distances (mm) measured * (must have either this or @rtt_avg) * @dist_variance: variance of distances measured (see also @rtt_variance) * @dist_spread: spread of distances measured (see also @rtt_spread) * @num_ftmr_attempts_valid: @num_ftmr_attempts is valid * @num_ftmr_successes_valid: @num_ftmr_successes is valid * @rssi_avg_valid: @rssi_avg is valid * @rssi_spread_valid: @rssi_spread is valid * @tx_rate_valid: @tx_rate is valid * @rx_rate_valid: @rx_rate is valid * @rtt_avg_valid: @rtt_avg is valid * @rtt_variance_valid: @rtt_variance is valid * @rtt_spread_valid: @rtt_spread is valid * @dist_avg_valid: @dist_avg is valid * @dist_variance_valid: @dist_variance is valid * @dist_spread_valid: @dist_spread is valid */ struct cfg80211_pmsr_ftm_result { const u8 *lci; const u8 *civicloc; unsigned int lci_len; unsigned int civicloc_len; enum nl80211_peer_measurement_ftm_failure_reasons failure_reason; u32 num_ftmr_attempts, num_ftmr_successes; s16 burst_index; u8 busy_retry_time; u8 num_bursts_exp; u8 burst_duration; u8 ftms_per_burst; s32 rssi_avg; s32 rssi_spread; struct rate_info tx_rate, rx_rate; s64 rtt_avg; s64 rtt_variance; s64 rtt_spread; s64 dist_avg; s64 dist_variance; s64 dist_spread; u16 num_ftmr_attempts_valid:1, num_ftmr_successes_valid:1, rssi_avg_valid:1, rssi_spread_valid:1, tx_rate_valid:1, rx_rate_valid:1, rtt_avg_valid:1, rtt_variance_valid:1, rtt_spread_valid:1, dist_avg_valid:1, dist_variance_valid:1, dist_spread_valid:1; }; /** * struct cfg80211_pmsr_result - peer measurement result * @addr: address of the peer * @host_time: host time (use ktime_get_boottime() adjust to the time when the * measurement was made) * @ap_tsf: AP's TSF at measurement time * @status: status of the measurement * @final: if reporting partial results, mark this as the last one; if not * reporting partial results always set this flag * @ap_tsf_valid: indicates the @ap_tsf value is valid * @type: type of the measurement reported, note that we only support reporting * one type at a time, but you can report multiple results separately and * they're all aggregated for userspace. */ struct cfg80211_pmsr_result { u64 host_time, ap_tsf; enum nl80211_peer_measurement_status status; u8 addr[ETH_ALEN]; u8 final:1, ap_tsf_valid:1; enum nl80211_peer_measurement_type type; union { struct cfg80211_pmsr_ftm_result ftm; }; }; /** * struct cfg80211_pmsr_ftm_request_peer - FTM request data * @requested: indicates FTM is requested * @preamble: frame preamble to use * @burst_period: burst period to use * @asap: indicates to use ASAP mode * @num_bursts_exp: number of bursts exponent * @burst_duration: burst duration * @ftms_per_burst: number of FTMs per burst * @ftmr_retries: number of retries for FTM request * @request_lci: request LCI information * @request_civicloc: request civic location information * @trigger_based: use trigger based ranging for the measurement * If neither @trigger_based nor @non_trigger_based is set, * EDCA based ranging will be used. * @non_trigger_based: use non trigger based ranging for the measurement * If neither @trigger_based nor @non_trigger_based is set, * EDCA based ranging will be used. * * See also nl80211 for the respective attribute documentation. */ struct cfg80211_pmsr_ftm_request_peer { enum nl80211_preamble preamble; u16 burst_period; u8 requested:1, asap:1, request_lci:1, request_civicloc:1, trigger_based:1, non_trigger_based:1; u8 num_bursts_exp; u8 burst_duration; u8 ftms_per_burst; u8 ftmr_retries; }; /** * struct cfg80211_pmsr_request_peer - peer data for a peer measurement request * @addr: MAC address * @chandef: channel to use * @report_ap_tsf: report the associated AP's TSF * @ftm: FTM data, see &struct cfg80211_pmsr_ftm_request_peer */ struct cfg80211_pmsr_request_peer { u8 addr[ETH_ALEN]; struct cfg80211_chan_def chandef; u8 report_ap_tsf:1; struct cfg80211_pmsr_ftm_request_peer ftm; }; /** * struct cfg80211_pmsr_request - peer measurement request * @cookie: cookie, set by cfg80211 * @nl_portid: netlink portid - used by cfg80211 * @drv_data: driver data for this request, if required for aborting, * not otherwise freed or anything by cfg80211 * @mac_addr: MAC address used for (randomised) request * @mac_addr_mask: MAC address mask used for randomisation, bits that * are 0 in the mask should be randomised, bits that are 1 should * be taken from the @mac_addr * @list: used by cfg80211 to hold on to the request * @timeout: timeout (in milliseconds) for the whole operation, if * zero it means there's no timeout * @n_peers: number of peers to do measurements with * @peers: per-peer measurement request data */ struct cfg80211_pmsr_request { u64 cookie; void *drv_data; u32 n_peers; u32 nl_portid; u32 timeout; u8 mac_addr[ETH_ALEN] __aligned(2); u8 mac_addr_mask[ETH_ALEN] __aligned(2); struct list_head list; struct cfg80211_pmsr_request_peer peers[]; }; /** * struct cfg80211_update_owe_info - OWE Information * * This structure provides information needed for the drivers to offload OWE * (Opportunistic Wireless Encryption) processing to the user space. * * Commonly used across update_owe_info request and event interfaces. * * @peer: MAC address of the peer device for which the OWE processing * has to be done. * @status: status code, %WLAN_STATUS_SUCCESS for successful OWE info * processing, use %WLAN_STATUS_UNSPECIFIED_FAILURE if user space * cannot give you the real status code for failures. Used only for * OWE update request command interface (user space to driver). * @ie: IEs obtained from the peer or constructed by the user space. These are * the IEs of the remote peer in the event from the host driver and * the constructed IEs by the user space in the request interface. * @ie_len: Length of IEs in octets. */ struct cfg80211_update_owe_info { u8 peer[ETH_ALEN] __aligned(2); u16 status; const u8 *ie; size_t ie_len; }; /** * struct mgmt_frame_regs - management frame registrations data * @global_stypes: bitmap of management frame subtypes registered * for the entire device * @interface_stypes: bitmap of management frame subtypes registered * for the given interface * @global_mcast_rx: mcast RX is needed globally for these subtypes * @interface_mcast_stypes: mcast RX is needed on this interface * for these subtypes */ struct mgmt_frame_regs { u32 global_stypes, interface_stypes; u32 global_mcast_stypes, interface_mcast_stypes; }; /** * struct cfg80211_ops - backend description for wireless configuration * * This struct is registered by fullmac card drivers and/or wireless stacks * in order to handle configuration requests on their interfaces. * * All callbacks except where otherwise noted should return 0 * on success or a negative error code. * * All operations are currently invoked under rtnl for consistency with the * wireless extensions but this is subject to reevaluation as soon as this * code is used more widely and we have a first user without wext. * * @suspend: wiphy device needs to be suspended. The variable @wow will * be %NULL or contain the enabled Wake-on-Wireless triggers that are * configured for the device. * @resume: wiphy device needs to be resumed * @set_wakeup: Called when WoWLAN is enabled/disabled, use this callback * to call device_set_wakeup_enable() to enable/disable wakeup from * the device. * * @add_virtual_intf: create a new virtual interface with the given name, * must set the struct wireless_dev's iftype. Beware: You must create * the new netdev in the wiphy's network namespace! Returns the struct * wireless_dev, or an ERR_PTR. For P2P device wdevs, the driver must * also set the address member in the wdev. * * @del_virtual_intf: remove the virtual interface * * @change_virtual_intf: change type/configuration of virtual interface, * keep the struct wireless_dev's iftype updated. * * @add_key: add a key with the given parameters. @mac_addr will be %NULL * when adding a group key. * * @get_key: get information about the key with the given parameters. * @mac_addr will be %NULL when requesting information for a group * key. All pointers given to the @callback function need not be valid * after it returns. This function should return an error if it is * not possible to retrieve the key, -ENOENT if it doesn't exist. * * @del_key: remove a key given the @mac_addr (%NULL for a group key) * and @key_index, return -ENOENT if the key doesn't exist. * * @set_default_key: set the default key on an interface * * @set_default_mgmt_key: set the default management frame key on an interface * * @set_default_beacon_key: set the default Beacon frame key on an interface * * @set_rekey_data: give the data necessary for GTK rekeying to the driver * * @start_ap: Start acting in AP mode defined by the parameters. * @change_beacon: Change the beacon parameters for an access point mode * interface. This should reject the call when AP mode wasn't started. * @stop_ap: Stop being an AP, including stopping beaconing. * * @add_station: Add a new station. * @del_station: Remove a station * @change_station: Modify a given station. Note that flags changes are not much * validated in cfg80211, in particular the auth/assoc/authorized flags * might come to the driver in invalid combinations -- make sure to check * them, also against the existing state! Drivers must call * cfg80211_check_station_change() to validate the information. * @get_station: get station information for the station identified by @mac * @dump_station: dump station callback -- resume dump at index @idx * * @add_mpath: add a fixed mesh path * @del_mpath: delete a given mesh path * @change_mpath: change a given mesh path * @get_mpath: get a mesh path for the given parameters * @dump_mpath: dump mesh path callback -- resume dump at index @idx * @get_mpp: get a mesh proxy path for the given parameters * @dump_mpp: dump mesh proxy path callback -- resume dump at index @idx * @join_mesh: join the mesh network with the specified parameters * (invoked with the wireless_dev mutex held) * @leave_mesh: leave the current mesh network * (invoked with the wireless_dev mutex held) * * @get_mesh_config: Get the current mesh configuration * * @update_mesh_config: Update mesh parameters on a running mesh. * The mask is a bitfield which tells us which parameters to * set, and which to leave alone. * * @change_bss: Modify parameters for a given BSS. * * @set_txq_params: Set TX queue parameters * * @libertas_set_mesh_channel: Only for backward compatibility for libertas, * as it doesn't implement join_mesh and needs to set the channel to * join the mesh instead. * * @set_monitor_channel: Set the monitor mode channel for the device. If other * interfaces are active this callback should reject the configuration. * If no interfaces are active or the device is down, the channel should * be stored for when a monitor interface becomes active. * * @scan: Request to do a scan. If returning zero, the scan request is given * the driver, and will be valid until passed to cfg80211_scan_done(). * For scan results, call cfg80211_inform_bss(); you can call this outside * the scan/scan_done bracket too. * @abort_scan: Tell the driver to abort an ongoing scan. The driver shall * indicate the status of the scan through cfg80211_scan_done(). * * @auth: Request to authenticate with the specified peer * (invoked with the wireless_dev mutex held) * @assoc: Request to (re)associate with the specified peer * (invoked with the wireless_dev mutex held) * @deauth: Request to deauthenticate from the specified peer * (invoked with the wireless_dev mutex held) * @disassoc: Request to disassociate from the specified peer * (invoked with the wireless_dev mutex held) * * @connect: Connect to the ESS with the specified parameters. When connected, * call cfg80211_connect_result()/cfg80211_connect_bss() with status code * %WLAN_STATUS_SUCCESS. If the connection fails for some reason, call * cfg80211_connect_result()/cfg80211_connect_bss() with the status code * from the AP or cfg80211_connect_timeout() if no frame with status code * was received. * The driver is allowed to roam to other BSSes within the ESS when the * other BSS matches the connect parameters. When such roaming is initiated * by the driver, the driver is expected to verify that the target matches * the configured security parameters and to use Reassociation Request * frame instead of Association Request frame. * The connect function can also be used to request the driver to perform a * specific roam when connected to an ESS. In that case, the prev_bssid * parameter is set to the BSSID of the currently associated BSS as an * indication of requesting reassociation. * In both the driver-initiated and new connect() call initiated roaming * cases, the result of roaming is indicated with a call to * cfg80211_roamed(). (invoked with the wireless_dev mutex held) * @update_connect_params: Update the connect parameters while connected to a * BSS. The updated parameters can be used by driver/firmware for * subsequent BSS selection (roaming) decisions and to form the * Authentication/(Re)Association Request frames. This call does not * request an immediate disassociation or reassociation with the current * BSS, i.e., this impacts only subsequent (re)associations. The bits in * changed are defined in &enum cfg80211_connect_params_changed. * (invoked with the wireless_dev mutex held) * @disconnect: Disconnect from the BSS/ESS or stop connection attempts if * connection is in progress. Once done, call cfg80211_disconnected() in * case connection was already established (invoked with the * wireless_dev mutex held), otherwise call cfg80211_connect_timeout(). * * @join_ibss: Join the specified IBSS (or create if necessary). Once done, call * cfg80211_ibss_joined(), also call that function when changing BSSID due * to a merge. * (invoked with the wireless_dev mutex held) * @leave_ibss: Leave the IBSS. * (invoked with the wireless_dev mutex held) * * @set_mcast_rate: Set the specified multicast rate (only if vif is in ADHOC or * MESH mode) * * @set_wiphy_params: Notify that wiphy parameters have changed; * @changed bitfield (see &enum wiphy_params_flags) describes which values * have changed. The actual parameter values are available in * struct wiphy. If returning an error, no value should be changed. * * @set_tx_power: set the transmit power according to the parameters, * the power passed is in mBm, to get dBm use MBM_TO_DBM(). The * wdev may be %NULL if power was set for the wiphy, and will * always be %NULL unless the driver supports per-vif TX power * (as advertised by the nl80211 feature flag.) * @get_tx_power: store the current TX power into the dbm variable; * return 0 if successful * * @set_wds_peer: set the WDS peer for a WDS interface * * @rfkill_poll: polls the hw rfkill line, use cfg80211 reporting * functions to adjust rfkill hw state * * @dump_survey: get site survey information. * * @remain_on_channel: Request the driver to remain awake on the specified * channel for the specified duration to complete an off-channel * operation (e.g., public action frame exchange). When the driver is * ready on the requested channel, it must indicate this with an event * notification by calling cfg80211_ready_on_channel(). * @cancel_remain_on_channel: Cancel an on-going remain-on-channel operation. * This allows the operation to be terminated prior to timeout based on * the duration value. * @mgmt_tx: Transmit a management frame. * @mgmt_tx_cancel_wait: Cancel the wait time from transmitting a management * frame on another channel * * @testmode_cmd: run a test mode command; @wdev may be %NULL * @testmode_dump: Implement a test mode dump. The cb->args[2] and up may be * used by the function, but 0 and 1 must not be touched. Additionally, * return error codes other than -ENOBUFS and -ENOENT will terminate the * dump and return to userspace with an error, so be careful. If any data * was passed in from userspace then the data/len arguments will be present * and point to the data contained in %NL80211_ATTR_TESTDATA. * * @set_bitrate_mask: set the bitrate mask configuration * * @set_pmksa: Cache a PMKID for a BSSID. This is mostly useful for fullmac * devices running firmwares capable of generating the (re) association * RSN IE. It allows for faster roaming between WPA2 BSSIDs. * @del_pmksa: Delete a cached PMKID. * @flush_pmksa: Flush all cached PMKIDs. * @set_power_mgmt: Configure WLAN power management. A timeout value of -1 * allows the driver to adjust the dynamic ps timeout value. * @set_cqm_rssi_config: Configure connection quality monitor RSSI threshold. * After configuration, the driver should (soon) send an event indicating * the current level is above/below the configured threshold; this may * need some care when the configuration is changed (without first being * disabled.) * @set_cqm_rssi_range_config: Configure two RSSI thresholds in the * connection quality monitor. An event is to be sent only when the * signal level is found to be outside the two values. The driver should * set %NL80211_EXT_FEATURE_CQM_RSSI_LIST if this method is implemented. * If it is provided then there's no point providing @set_cqm_rssi_config. * @set_cqm_txe_config: Configure connection quality monitor TX error * thresholds. * @sched_scan_start: Tell the driver to start a scheduled scan. * @sched_scan_stop: Tell the driver to stop an ongoing scheduled scan with * given request id. This call must stop the scheduled scan and be ready * for starting a new one before it returns, i.e. @sched_scan_start may be * called immediately after that again and should not fail in that case. * The driver should not call cfg80211_sched_scan_stopped() for a requested * stop (when this method returns 0). * * @update_mgmt_frame_registrations: Notify the driver that management frame * registrations were updated. The callback is allowed to sleep. * * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may * reject TX/RX mask combinations they cannot support by returning -EINVAL * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). * * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). * * @tdls_mgmt: Transmit a TDLS management frame. * @tdls_oper: Perform a high-level TDLS operation (e.g. TDLS link setup). * * @probe_client: probe an associated client, must return a cookie that it * later passes to cfg80211_probe_status(). * * @set_noack_map: Set the NoAck Map for the TIDs. * * @get_channel: Get the current operating channel for the virtual interface. * For monitor interfaces, it should return %NULL unless there's a single * current monitoring channel. * * @start_p2p_device: Start the given P2P device. * @stop_p2p_device: Stop the given P2P device. * * @set_mac_acl: Sets MAC address control list in AP and P2P GO mode. * Parameters include ACL policy, an array of MAC address of stations * and the number of MAC addresses. If there is already a list in driver * this new list replaces the existing one. Driver has to clear its ACL * when number of MAC addresses entries is passed as 0. Drivers which * advertise the support for MAC based ACL have to implement this callback. * * @start_radar_detection: Start radar detection in the driver. * * @end_cac: End running CAC, probably because a related CAC * was finished on another phy. * * @update_ft_ies: Provide updated Fast BSS Transition information to the * driver. If the SME is in the driver/firmware, this information can be * used in building Authentication and Reassociation Request frames. * * @crit_proto_start: Indicates a critical protocol needs more link reliability * for a given duration (milliseconds). The protocol is provided so the * driver can take the most appropriate actions. * @crit_proto_stop: Indicates critical protocol no longer needs increased link * reliability. This operation can not fail. * @set_coalesce: Set coalesce parameters. * * @channel_switch: initiate channel-switch procedure (with CSA). Driver is * responsible for veryfing if the switch is possible. Since this is * inherently tricky driver may decide to disconnect an interface later * with cfg80211_stop_iface(). This doesn't mean driver can accept * everything. It should do it's best to verify requests and reject them * as soon as possible. * * @set_qos_map: Set QoS mapping information to the driver * * @set_ap_chanwidth: Set the AP (including P2P GO) mode channel width for the * given interface This is used e.g. for dynamic HT 20/40 MHz channel width * changes during the lifetime of the BSS. * * @add_tx_ts: validate (if admitted_time is 0) or add a TX TS to the device * with the given parameters; action frame exchange has been handled by * userspace so this just has to modify the TX path to take the TS into * account. * If the admitted time is 0 just validate the parameters to make sure * the session can be created at all; it is valid to just always return * success for that but that may result in inefficient behaviour (handshake * with the peer followed by immediate teardown when the addition is later * rejected) * @del_tx_ts: remove an existing TX TS * * @join_ocb: join the OCB network with the specified parameters * (invoked with the wireless_dev mutex held) * @leave_ocb: leave the current OCB network * (invoked with the wireless_dev mutex held) * * @tdls_channel_switch: Start channel-switching with a TDLS peer. The driver * is responsible for continually initiating channel-switching operations * and returning to the base channel for communication with the AP. * @tdls_cancel_channel_switch: Stop channel-switching with a TDLS peer. Both * peers must be on the base channel when the call completes. * @start_nan: Start the NAN interface. * @stop_nan: Stop the NAN interface. * @add_nan_func: Add a NAN function. Returns negative value on failure. * On success @nan_func ownership is transferred to the driver and * it may access it outside of the scope of this function. The driver * should free the @nan_func when no longer needed by calling * cfg80211_free_nan_func(). * On success the driver should assign an instance_id in the * provided @nan_func. * @del_nan_func: Delete a NAN function. * @nan_change_conf: changes NAN configuration. The changed parameters must * be specified in @changes (using &enum cfg80211_nan_conf_changes); * All other parameters must be ignored. * * @set_multicast_to_unicast: configure multicast to unicast conversion for BSS * * @get_txq_stats: Get TXQ stats for interface or phy. If wdev is %NULL, this * function should return phy stats, and interface stats otherwise. * * @set_pmk: configure the PMK to be used for offloaded 802.1X 4-Way handshake. * If not deleted through @del_pmk the PMK remains valid until disconnect * upon which the driver should clear it. * (invoked with the wireless_dev mutex held) * @del_pmk: delete the previously configured PMK for the given authenticator. * (invoked with the wireless_dev mutex held) * * @external_auth: indicates result of offloaded authentication processing from * user space * * @tx_control_port: TX a control port frame (EAPoL). The noencrypt parameter * tells the driver that the frame should not be encrypted. * * @get_ftm_responder_stats: Retrieve FTM responder statistics, if available. * Statistics should be cumulative, currently no way to reset is provided. * @start_pmsr: start peer measurement (e.g. FTM) * @abort_pmsr: abort peer measurement * * @update_owe_info: Provide updated OWE info to driver. Driver implementing SME * but offloading OWE processing to the user space will get the updated * DH IE through this interface. * * @probe_mesh_link: Probe direct Mesh peer's link quality by sending data frame * and overrule HWMP path selection algorithm. * @set_tid_config: TID specific configuration, this can be peer or BSS specific * This callback may sleep. * @reset_tid_config: Reset TID specific configuration for the peer, for the * given TIDs. This callback may sleep. */ struct cfg80211_ops { int (*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow); int (*resume)(struct wiphy *wiphy); void (*set_wakeup)(struct wiphy *wiphy, bool enabled); struct wireless_dev * (*add_virtual_intf)(struct wiphy *wiphy, const char *name, unsigned char name_assign_type, enum nl80211_iftype type, struct vif_params *params); int (*del_virtual_intf)(struct wiphy *wiphy, struct wireless_dev *wdev); int (*change_virtual_intf)(struct wiphy *wiphy, struct net_device *dev, enum nl80211_iftype type, struct vif_params *params); int (*add_key)(struct wiphy *wiphy, struct net_device *netdev, u8 key_index, bool pairwise, const u8 *mac_addr, struct key_params *params); int (*get_key)(struct wiphy *wiphy, struct net_device *netdev, u8 key_index, bool pairwise, const u8 *mac_addr, void *cookie, void (*callback)(void *cookie, struct key_params*)); int (*del_key)(struct wiphy *wiphy, struct net_device *netdev, u8 key_index, bool pairwise, const u8 *mac_addr); int (*set_default_key)(struct wiphy *wiphy, struct net_device *netdev, u8 key_index, bool unicast, bool multicast); int (*set_default_mgmt_key)(struct wiphy *wiphy, struct net_device *netdev, u8 key_index); int (*set_default_beacon_key)(struct wiphy *wiphy, struct net_device *netdev, u8 key_index); int (*start_ap)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_ap_settings *settings); int (*change_beacon)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_beacon_data *info); int (*stop_ap)(struct wiphy *wiphy, struct net_device *dev); int (*add_station)(struct wiphy *wiphy, struct net_device *dev, const u8 *mac, struct station_parameters *params); int (*del_station)(struct wiphy *wiphy, struct net_device *dev, struct station_del_parameters *params); int (*change_station)(struct wiphy *wiphy, struct net_device *dev, const u8 *mac, struct station_parameters *params); int (*get_station)(struct wiphy *wiphy, struct net_device *dev, const u8 *mac, struct station_info *sinfo); int (*dump_station)(struct wiphy *wiphy, struct net_device *dev, int idx, u8 *mac, struct station_info *sinfo); int (*add_mpath)(struct wiphy *wiphy, struct net_device *dev, const u8 *dst, const u8 *next_hop); int (*del_mpath)(struct wiphy *wiphy, struct net_device *dev, const u8 *dst); int (*change_mpath)(struct wiphy *wiphy, struct net_device *dev, const u8 *dst, const u8 *next_hop); int (*get_mpath)(struct wiphy *wiphy, struct net_device *dev, u8 *dst, u8 *next_hop, struct mpath_info *pinfo); int (*dump_mpath)(struct wiphy *wiphy, struct net_device *dev, int idx, u8 *dst, u8 *next_hop, struct mpath_info *pinfo); int (*get_mpp)(struct wiphy *wiphy, struct net_device *dev, u8 *dst, u8 *mpp, struct mpath_info *pinfo); int (*dump_mpp)(struct wiphy *wiphy, struct net_device *dev, int idx, u8 *dst, u8 *mpp, struct mpath_info *pinfo); int (*get_mesh_config)(struct wiphy *wiphy, struct net_device *dev, struct mesh_config *conf); int (*update_mesh_config)(struct wiphy *wiphy, struct net_device *dev, u32 mask, const struct mesh_config *nconf); int (*join_mesh)(struct wiphy *wiphy, struct net_device *dev, const struct mesh_config *conf, const struct mesh_setup *setup); int (*leave_mesh)(struct wiphy *wiphy, struct net_device *dev); int (*join_ocb)(struct wiphy *wiphy, struct net_device *dev, struct ocb_setup *setup); int (*leave_ocb)(struct wiphy *wiphy, struct net_device *dev); int (*change_bss)(struct wiphy *wiphy, struct net_device *dev, struct bss_parameters *params); int (*set_txq_params)(struct wiphy *wiphy, struct net_device *dev, struct ieee80211_txq_params *params); int (*libertas_set_mesh_channel)(struct wiphy *wiphy, struct net_device *dev, struct ieee80211_channel *chan); int (*set_monitor_channel)(struct wiphy *wiphy, struct cfg80211_chan_def *chandef); int (*scan)(struct wiphy *wiphy, struct cfg80211_scan_request *request); void (*abort_scan)(struct wiphy *wiphy, struct wireless_dev *wdev); int (*auth)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_auth_request *req); int (*assoc)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_assoc_request *req); int (*deauth)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_deauth_request *req); int (*disassoc)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_disassoc_request *req); int (*connect)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_connect_params *sme); int (*update_connect_params)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_connect_params *sme, u32 changed); int (*disconnect)(struct wiphy *wiphy, struct net_device *dev, u16 reason_code); int (*join_ibss)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_ibss_params *params); int (*leave_ibss)(struct wiphy *wiphy, struct net_device *dev); int (*set_mcast_rate)(struct wiphy *wiphy, struct net_device *dev, int rate[NUM_NL80211_BANDS]); int (*set_wiphy_params)(struct wiphy *wiphy, u32 changed); int (*set_tx_power)(struct wiphy *wiphy, struct wireless_dev *wdev, enum nl80211_tx_power_setting type, int mbm); int (*get_tx_power)(struct wiphy *wiphy, struct wireless_dev *wdev, int *dbm); int (*set_wds_peer)(struct wiphy *wiphy, struct net_device *dev, const u8 *addr); void (*rfkill_poll)(struct wiphy *wiphy); #ifdef CONFIG_NL80211_TESTMODE int (*testmode_cmd)(struct wiphy *wiphy, struct wireless_dev *wdev, void *data, int len); int (*testmode_dump)(struct wiphy *wiphy, struct sk_buff *skb, struct netlink_callback *cb, void *data, int len); #endif int (*set_bitrate_mask)(struct wiphy *wiphy, struct net_device *dev, const u8 *peer, const struct cfg80211_bitrate_mask *mask); int (*dump_survey)(struct wiphy *wiphy, struct net_device *netdev, int idx, struct survey_info *info); int (*set_pmksa)(struct wiphy *wiphy, struct net_device *netdev, struct cfg80211_pmksa *pmksa); int (*del_pmksa)(struct wiphy *wiphy, struct net_device *netdev, struct cfg80211_pmksa *pmksa); int (*flush_pmksa)(struct wiphy *wiphy, struct net_device *netdev); int (*remain_on_channel)(struct wiphy *wiphy, struct wireless_dev *wdev, struct ieee80211_channel *chan, unsigned int duration, u64 *cookie); int (*cancel_remain_on_channel)(struct wiphy *wiphy, struct wireless_dev *wdev, u64 cookie); int (*mgmt_tx)(struct wiphy *wiphy, struct wireless_dev *wdev, struct cfg80211_mgmt_tx_params *params, u64 *cookie); int (*mgmt_tx_cancel_wait)(struct wiphy *wiphy, struct wireless_dev *wdev, u64 cookie); int (*set_power_mgmt)(struct wiphy *wiphy, struct net_device *dev, bool enabled, int timeout); int (*set_cqm_rssi_config)(struct wiphy *wiphy, struct net_device *dev, s32 rssi_thold, u32 rssi_hyst); int (*set_cqm_rssi_range_config)(struct wiphy *wiphy, struct net_device *dev, s32 rssi_low, s32 rssi_high); int (*set_cqm_txe_config)(struct wiphy *wiphy, struct net_device *dev, u32 rate, u32 pkts, u32 intvl); void (*update_mgmt_frame_registrations)(struct wiphy *wiphy, struct wireless_dev *wdev, struct mgmt_frame_regs *upd); int (*set_antenna)(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant); int (*get_antenna)(struct wiphy *wiphy, u32 *tx_ant, u32 *rx_ant); int (*sched_scan_start)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_sched_scan_request *request); int (*sched_scan_stop)(struct wiphy *wiphy, struct net_device *dev, u64 reqid); int (*set_rekey_data)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_gtk_rekey_data *data); int (*tdls_mgmt)(struct wiphy *wiphy, struct net_device *dev, const u8 *peer, u8 action_code, u8 dialog_token, u16 status_code, u32 peer_capability, bool initiator, const u8 *buf, size_t len); int (*tdls_oper)(struct wiphy *wiphy, struct net_device *dev, const u8 *peer, enum nl80211_tdls_operation oper); int (*probe_client)(struct wiphy *wiphy, struct net_device *dev, const u8 *peer, u64 *cookie); int (*set_noack_map)(struct wiphy *wiphy, struct net_device *dev, u16 noack_map); int (*get_channel)(struct wiphy *wiphy, struct wireless_dev *wdev, struct cfg80211_chan_def *chandef); int (*start_p2p_device)(struct wiphy *wiphy, struct wireless_dev *wdev); void (*stop_p2p_device)(struct wiphy *wiphy, struct wireless_dev *wdev); int (*set_mac_acl)(struct wiphy *wiphy, struct net_device *dev, const struct cfg80211_acl_data *params); int (*start_radar_detection)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_chan_def *chandef, u32 cac_time_ms); void (*end_cac)(struct wiphy *wiphy, struct net_device *dev); int (*update_ft_ies)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_update_ft_ies_params *ftie); int (*crit_proto_start)(struct wiphy *wiphy, struct wireless_dev *wdev, enum nl80211_crit_proto_id protocol, u16 duration); void (*crit_proto_stop)(struct wiphy *wiphy, struct wireless_dev *wdev); int (*set_coalesce)(struct wiphy *wiphy, struct cfg80211_coalesce *coalesce); int (*channel_switch)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_csa_settings *params); int (*set_qos_map)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_qos_map *qos_map); int (*set_ap_chanwidth)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_chan_def *chandef); int (*add_tx_ts)(struct wiphy *wiphy, struct net_device *dev, u8 tsid, const u8 *peer, u8 user_prio, u16 admitted_time); int (*del_tx_ts)(struct wiphy *wiphy, struct net_device *dev, u8 tsid, const u8 *peer); int (*tdls_channel_switch)(struct wiphy *wiphy, struct net_device *dev, const u8 *addr, u8 oper_class, struct cfg80211_chan_def *chandef); void (*tdls_cancel_channel_switch)(struct wiphy *wiphy, struct net_device *dev, const u8 *addr); int (*start_nan)(struct wiphy *wiphy, struct wireless_dev *wdev, struct cfg80211_nan_conf *conf); void (*stop_nan)(struct wiphy *wiphy, struct wireless_dev *wdev); int (*add_nan_func)(struct wiphy *wiphy, struct wireless_dev *wdev, struct cfg80211_nan_func *nan_func); void (*del_nan_func)(struct wiphy *wiphy, struct wireless_dev *wdev, u64 cookie); int (*nan_change_conf)(struct wiphy *wiphy, struct wireless_dev *wdev, struct cfg80211_nan_conf *conf, u32 changes); int (*set_multicast_to_unicast)(struct wiphy *wiphy, struct net_device *dev, const bool enabled); int (*get_txq_stats)(struct wiphy *wiphy, struct wireless_dev *wdev, struct cfg80211_txq_stats *txqstats); int (*set_pmk)(struct wiphy *wiphy, struct net_device *dev, const struct cfg80211_pmk_conf *conf); int (*del_pmk)(struct wiphy *wiphy, struct net_device *dev, const u8 *aa); int (*external_auth)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_external_auth_params *params); int (*tx_control_port)(struct wiphy *wiphy, struct net_device *dev, const u8 *buf, size_t len, const u8 *dest, const __be16 proto, const bool noencrypt, u64 *cookie); int (*get_ftm_responder_stats)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_ftm_responder_stats *ftm_stats); int (*start_pmsr)(struct wiphy *wiphy, struct wireless_dev *wdev, struct cfg80211_pmsr_request *request); void (*abort_pmsr)(struct wiphy *wiphy, struct wireless_dev *wdev, struct cfg80211_pmsr_request *request); int (*update_owe_info)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_update_owe_info *owe_info); int (*probe_mesh_link)(struct wiphy *wiphy, struct net_device *dev, const u8 *buf, size_t len); int (*set_tid_config)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_tid_config *tid_conf); int (*reset_tid_config)(struct wiphy *wiphy, struct net_device *dev, const u8 *peer, u8 tids); }; /* * wireless hardware and networking interfaces structures * and registration/helper functions */ /** * enum wiphy_flags - wiphy capability flags * * @WIPHY_FLAG_SPLIT_SCAN_6GHZ: if set to true, the scan request will be split * into two, first for legacy bands and second for UHB. * @WIPHY_FLAG_NETNS_OK: if not set, do not allow changing the netns of this * wiphy at all * @WIPHY_FLAG_PS_ON_BY_DEFAULT: if set to true, powersave will be enabled * by default -- this flag will be set depending on the kernel's default * on wiphy_new(), but can be changed by the driver if it has a good * reason to override the default * @WIPHY_FLAG_4ADDR_AP: supports 4addr mode even on AP (with a single station * on a VLAN interface). This flag also serves an extra purpose of * supporting 4ADDR AP mode on devices which do not support AP/VLAN iftype. * @WIPHY_FLAG_4ADDR_STATION: supports 4addr mode even as a station * @WIPHY_FLAG_CONTROL_PORT_PROTOCOL: This device supports setting the * control port protocol ethertype. The device also honours the * control_port_no_encrypt flag. * @WIPHY_FLAG_IBSS_RSN: The device supports IBSS RSN. * @WIPHY_FLAG_MESH_AUTH: The device supports mesh authentication by routing * auth frames to userspace. See @NL80211_MESH_SETUP_USERSPACE_AUTH. * @WIPHY_FLAG_SUPPORTS_FW_ROAM: The device supports roaming feature in the * firmware. * @WIPHY_FLAG_AP_UAPSD: The device supports uapsd on AP. * @WIPHY_FLAG_SUPPORTS_TDLS: The device supports TDLS (802.11z) operation. * @WIPHY_FLAG_TDLS_EXTERNAL_SETUP: The device does not handle TDLS (802.11z) * link setup/discovery operations internally. Setup, discovery and * teardown packets should be sent through the @NL80211_CMD_TDLS_MGMT * command. When this flag is not set, @NL80211_CMD_TDLS_OPER should be * used for asking the driver/firmware to perform a TDLS operation. * @WIPHY_FLAG_HAVE_AP_SME: device integrates AP SME * @WIPHY_FLAG_REPORTS_OBSS: the device will report beacons from other BSSes * when there are virtual interfaces in AP mode by calling * cfg80211_report_obss_beacon(). * @WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD: When operating as an AP, the device * responds to probe-requests in hardware. * @WIPHY_FLAG_OFFCHAN_TX: Device supports direct off-channel TX. * @WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL: Device supports remain-on-channel call. * @WIPHY_FLAG_SUPPORTS_5_10_MHZ: Device supports 5 MHz and 10 MHz channels. * @WIPHY_FLAG_HAS_CHANNEL_SWITCH: Device supports channel switch in * beaconing mode (AP, IBSS, Mesh, ...). * @WIPHY_FLAG_HAS_STATIC_WEP: The device supports static WEP key installation * before connection. * @WIPHY_FLAG_SUPPORTS_EXT_KEK_KCK: The device supports bigger kek and kck keys */ enum wiphy_flags { WIPHY_FLAG_SUPPORTS_EXT_KEK_KCK = BIT(0), /* use hole at 1 */ WIPHY_FLAG_SPLIT_SCAN_6GHZ = BIT(2), WIPHY_FLAG_NETNS_OK = BIT(3), WIPHY_FLAG_PS_ON_BY_DEFAULT = BIT(4), WIPHY_FLAG_4ADDR_AP = BIT(5), WIPHY_FLAG_4ADDR_STATION = BIT(6), WIPHY_FLAG_CONTROL_PORT_PROTOCOL = BIT(7), WIPHY_FLAG_IBSS_RSN = BIT(8), WIPHY_FLAG_MESH_AUTH = BIT(10), /* use hole at 11 */ /* use hole at 12 */ WIPHY_FLAG_SUPPORTS_FW_ROAM = BIT(13), WIPHY_FLAG_AP_UAPSD = BIT(14), WIPHY_FLAG_SUPPORTS_TDLS = BIT(15), WIPHY_FLAG_TDLS_EXTERNAL_SETUP = BIT(16), WIPHY_FLAG_HAVE_AP_SME = BIT(17), WIPHY_FLAG_REPORTS_OBSS = BIT(18), WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD = BIT(19), WIPHY_FLAG_OFFCHAN_TX = BIT(20), WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL = BIT(21), WIPHY_FLAG_SUPPORTS_5_10_MHZ = BIT(22), WIPHY_FLAG_HAS_CHANNEL_SWITCH = BIT(23), WIPHY_FLAG_HAS_STATIC_WEP = BIT(24), }; /** * struct ieee80211_iface_limit - limit on certain interface types * @max: maximum number of interfaces of these types * @types: interface types (bits) */ struct ieee80211_iface_limit { u16 max; u16 types; }; /** * struct ieee80211_iface_combination - possible interface combination * * With this structure the driver can describe which interface * combinations it supports concurrently. * * Examples: * * 1. Allow #STA <= 1, #AP <= 1, matching BI, channels = 1, 2 total: * * .. code-block:: c * * struct ieee80211_iface_limit limits1[] = { * { .max = 1, .types = BIT(NL80211_IFTYPE_STATION), }, * { .max = 1, .types = BIT(NL80211_IFTYPE_AP}, }, * }; * struct ieee80211_iface_combination combination1 = { * .limits = limits1, * .n_limits = ARRAY_SIZE(limits1), * .max_interfaces = 2, * .beacon_int_infra_match = true, * }; * * * 2. Allow #{AP, P2P-GO} <= 8, channels = 1, 8 total: * * .. code-block:: c * * struct ieee80211_iface_limit limits2[] = { * { .max = 8, .types = BIT(NL80211_IFTYPE_AP) | * BIT(NL80211_IFTYPE_P2P_GO), }, * }; * struct ieee80211_iface_combination combination2 = { * .limits = limits2, * .n_limits = ARRAY_SIZE(limits2), * .max_interfaces = 8, * .num_different_channels = 1, * }; * * * 3. Allow #STA <= 1, #{P2P-client,P2P-GO} <= 3 on two channels, 4 total. * * This allows for an infrastructure connection and three P2P connections. * * .. code-block:: c * * struct ieee80211_iface_limit limits3[] = { * { .max = 1, .types = BIT(NL80211_IFTYPE_STATION), }, * { .max = 3, .types = BIT(NL80211_IFTYPE_P2P_GO) | * BIT(NL80211_IFTYPE_P2P_CLIENT), }, * }; * struct ieee80211_iface_combination combination3 = { * .limits = limits3, * .n_limits = ARRAY_SIZE(limits3), * .max_interfaces = 4, * .num_different_channels = 2, * }; * */ struct ieee80211_iface_combination { /** * @limits: * limits for the given interface types */ const struct ieee80211_iface_limit *limits; /** * @num_different_channels: * can use up to this many different channels */ u32 num_different_channels; /** * @max_interfaces: * maximum number of interfaces in total allowed in this group */ u16 max_interfaces; /** * @n_limits: * number of limitations */ u8 n_limits; /** * @beacon_int_infra_match: * In this combination, the beacon intervals between infrastructure * and AP types must match. This is required only in special cases. */ bool beacon_int_infra_match; /** * @radar_detect_widths: * bitmap of channel widths supported for radar detection */ u8 radar_detect_widths; /** * @radar_detect_regions: * bitmap of regions supported for radar detection */ u8 radar_detect_regions; /** * @beacon_int_min_gcd: * This interface combination supports different beacon intervals. * * = 0 * all beacon intervals for different interface must be same. * > 0 * any beacon interval for the interface part of this combination AND * GCD of all beacon intervals from beaconing interfaces of this * combination must be greater or equal to this value. */ u32 beacon_int_min_gcd; }; struct ieee80211_txrx_stypes { u16 tx, rx; }; /** * enum wiphy_wowlan_support_flags - WoWLAN support flags * @WIPHY_WOWLAN_ANY: supports wakeup for the special "any" * trigger that keeps the device operating as-is and * wakes up the host on any activity, for example a * received packet that passed filtering; note that the * packet should be preserved in that case * @WIPHY_WOWLAN_MAGIC_PKT: supports wakeup on magic packet * (see nl80211.h) * @WIPHY_WOWLAN_DISCONNECT: supports wakeup on disconnect * @WIPHY_WOWLAN_SUPPORTS_GTK_REKEY: supports GTK rekeying while asleep * @WIPHY_WOWLAN_GTK_REKEY_FAILURE: supports wakeup on GTK rekey failure * @WIPHY_WOWLAN_EAP_IDENTITY_REQ: supports wakeup on EAP identity request * @WIPHY_WOWLAN_4WAY_HANDSHAKE: supports wakeup on 4-way handshake failure * @WIPHY_WOWLAN_RFKILL_RELEASE: supports wakeup on RF-kill release * @WIPHY_WOWLAN_NET_DETECT: supports wakeup on network detection */ enum wiphy_wowlan_support_flags { WIPHY_WOWLAN_ANY = BIT(0), WIPHY_WOWLAN_MAGIC_PKT = BIT(1), WIPHY_WOWLAN_DISCONNECT = BIT(2), WIPHY_WOWLAN_SUPPORTS_GTK_REKEY = BIT(3), WIPHY_WOWLAN_GTK_REKEY_FAILURE = BIT(4), WIPHY_WOWLAN_EAP_IDENTITY_REQ = BIT(5), WIPHY_WOWLAN_4WAY_HANDSHAKE = BIT(6), WIPHY_WOWLAN_RFKILL_RELEASE = BIT(7), WIPHY_WOWLAN_NET_DETECT = BIT(8), }; struct wiphy_wowlan_tcp_support { const struct nl80211_wowlan_tcp_data_token_feature *tok; u32 data_payload_max; u32 data_interval_max; u32 wake_payload_max; bool seq; }; /** * struct wiphy_wowlan_support - WoWLAN support data * @flags: see &enum wiphy_wowlan_support_flags * @n_patterns: number of supported wakeup patterns * (see nl80211.h for the pattern definition) * @pattern_max_len: maximum length of each pattern * @pattern_min_len: minimum length of each pattern * @max_pkt_offset: maximum Rx packet offset * @max_nd_match_sets: maximum number of matchsets for net-detect, * similar, but not necessarily identical, to max_match_sets for * scheduled scans. * See &struct cfg80211_sched_scan_request.@match_sets for more * details. * @tcp: TCP wakeup support information */ struct wiphy_wowlan_support { u32 flags; int n_patterns; int pattern_max_len; int pattern_min_len; int max_pkt_offset; int max_nd_match_sets; const struct wiphy_wowlan_tcp_support *tcp; }; /** * struct wiphy_coalesce_support - coalesce support data * @n_rules: maximum number of coalesce rules * @max_delay: maximum supported coalescing delay in msecs * @n_patterns: number of supported patterns in a rule * (see nl80211.h for the pattern definition) * @pattern_max_len: maximum length of each pattern * @pattern_min_len: minimum length of each pattern * @max_pkt_offset: maximum Rx packet offset */ struct wiphy_coalesce_support { int n_rules; int max_delay; int n_patterns; int pattern_max_len; int pattern_min_len; int max_pkt_offset; }; /** * enum wiphy_vendor_command_flags - validation flags for vendor commands * @WIPHY_VENDOR_CMD_NEED_WDEV: vendor command requires wdev * @WIPHY_VENDOR_CMD_NEED_NETDEV: vendor command requires netdev * @WIPHY_VENDOR_CMD_NEED_RUNNING: interface/wdev must be up & running * (must be combined with %_WDEV or %_NETDEV) */ enum wiphy_vendor_command_flags { WIPHY_VENDOR_CMD_NEED_WDEV = BIT(0), WIPHY_VENDOR_CMD_NEED_NETDEV = BIT(1), WIPHY_VENDOR_CMD_NEED_RUNNING = BIT(2), }; /** * enum wiphy_opmode_flag - Station's ht/vht operation mode information flags * * @STA_OPMODE_MAX_BW_CHANGED: Max Bandwidth changed * @STA_OPMODE_SMPS_MODE_CHANGED: SMPS mode changed * @STA_OPMODE_N_SS_CHANGED: max N_SS (number of spatial streams) changed * */ enum wiphy_opmode_flag { STA_OPMODE_MAX_BW_CHANGED = BIT(0), STA_OPMODE_SMPS_MODE_CHANGED = BIT(1), STA_OPMODE_N_SS_CHANGED = BIT(2), }; /** * struct sta_opmode_info - Station's ht/vht operation mode information * @changed: contains value from &enum wiphy_opmode_flag * @smps_mode: New SMPS mode value from &enum nl80211_smps_mode of a station * @bw: new max bandwidth value from &enum nl80211_chan_width of a station * @rx_nss: new rx_nss value of a station */ struct sta_opmode_info { u32 changed; enum nl80211_smps_mode smps_mode; enum nl80211_chan_width bw; u8 rx_nss; }; #define VENDOR_CMD_RAW_DATA ((const struct nla_policy *)(long)(-ENODATA)) /** * struct wiphy_vendor_command - vendor command definition * @info: vendor command identifying information, as used in nl80211 * @flags: flags, see &enum wiphy_vendor_command_flags * @doit: callback for the operation, note that wdev is %NULL if the * flags didn't ask for a wdev and non-%NULL otherwise; the data * pointer may be %NULL if userspace provided no data at all * @dumpit: dump callback, for transferring bigger/multiple items. The * @storage points to cb->args[5], ie. is preserved over the multiple * dumpit calls. * @policy: policy pointer for attributes within %NL80211_ATTR_VENDOR_DATA. * Set this to %VENDOR_CMD_RAW_DATA if no policy can be given and the * attribute is just raw data (e.g. a firmware command). * @maxattr: highest attribute number in policy * It's recommended to not have the same sub command with both @doit and * @dumpit, so that userspace can assume certain ones are get and others * are used with dump requests. */ struct wiphy_vendor_command { struct nl80211_vendor_cmd_info info; u32 flags; int (*doit)(struct wiphy *wiphy, struct wireless_dev *wdev, const void *data, int data_len); int (*dumpit)(struct wiphy *wiphy, struct wireless_dev *wdev, struct sk_buff *skb, const void *data, int data_len, unsigned long *storage); const struct nla_policy *policy; unsigned int maxattr; }; /** * struct wiphy_iftype_ext_capab - extended capabilities per interface type * @iftype: interface type * @extended_capabilities: extended capabilities supported by the driver, * additional capabilities might be supported by userspace; these are the * 802.11 extended capabilities ("Extended Capabilities element") and are * in the same format as in the information element. See IEEE Std * 802.11-2012 8.4.2.29 for the defined fields. * @extended_capabilities_mask: mask of the valid values * @extended_capabilities_len: length of the extended capabilities */ struct wiphy_iftype_ext_capab { enum nl80211_iftype iftype; const u8 *extended_capabilities; const u8 *extended_capabilities_mask; u8 extended_capabilities_len; }; /** * struct cfg80211_pmsr_capabilities - cfg80211 peer measurement capabilities * @max_peers: maximum number of peers in a single measurement * @report_ap_tsf: can report assoc AP's TSF for radio resource measurement * @randomize_mac_addr: can randomize MAC address for measurement * @ftm.supported: FTM measurement is supported * @ftm.asap: ASAP-mode is supported * @ftm.non_asap: non-ASAP-mode is supported * @ftm.request_lci: can request LCI data * @ftm.request_civicloc: can request civic location data * @ftm.preambles: bitmap of preambles supported (&enum nl80211_preamble) * @ftm.bandwidths: bitmap of bandwidths supported (&enum nl80211_chan_width) * @ftm.max_bursts_exponent: maximum burst exponent supported * (set to -1 if not limited; note that setting this will necessarily * forbid using the value 15 to let the responder pick) * @ftm.max_ftms_per_burst: maximum FTMs per burst supported (set to 0 if * not limited) * @ftm.trigger_based: trigger based ranging measurement is supported * @ftm.non_trigger_based: non trigger based ranging measurement is supported */ struct cfg80211_pmsr_capabilities { unsigned int max_peers; u8 report_ap_tsf:1, randomize_mac_addr:1; struct { u32 preambles; u32 bandwidths; s8 max_bursts_exponent; u8 max_ftms_per_burst; u8 supported:1, asap:1, non_asap:1, request_lci:1, request_civicloc:1, trigger_based:1, non_trigger_based:1; } ftm; }; /** * struct wiphy_iftype_akm_suites - This structure encapsulates supported akm * suites for interface types defined in @iftypes_mask. Each type in the * @iftypes_mask must be unique across all instances of iftype_akm_suites. * * @iftypes_mask: bitmask of interfaces types * @akm_suites: points to an array of supported akm suites * @n_akm_suites: number of supported AKM suites */ struct wiphy_iftype_akm_suites { u16 iftypes_mask; const u32 *akm_suites; int n_akm_suites; }; /** * struct wiphy - wireless hardware description * @reg_notifier: the driver's regulatory notification callback, * note that if your driver uses wiphy_apply_custom_regulatory() * the reg_notifier's request can be passed as NULL * @regd: the driver's regulatory domain, if one was requested via * the regulatory_hint() API. This can be used by the driver * on the reg_notifier() if it chooses to ignore future * regulatory domain changes caused by other drivers. * @signal_type: signal type reported in &struct cfg80211_bss. * @cipher_suites: supported cipher suites * @n_cipher_suites: number of supported cipher suites * @akm_suites: supported AKM suites. These are the default AKMs supported if * the supported AKMs not advertized for a specific interface type in * iftype_akm_suites. * @n_akm_suites: number of supported AKM suites * @iftype_akm_suites: array of supported akm suites info per interface type. * Note that the bits in @iftypes_mask inside this structure cannot * overlap (i.e. only one occurrence of each type is allowed across all * instances of iftype_akm_suites). * @num_iftype_akm_suites: number of interface types for which supported akm * suites are specified separately. * @retry_short: Retry limit for short frames (dot11ShortRetryLimit) * @retry_long: Retry limit for long frames (dot11LongRetryLimit) * @frag_threshold: Fragmentation threshold (dot11FragmentationThreshold); * -1 = fragmentation disabled, only odd values >= 256 used * @rts_threshold: RTS threshold (dot11RTSThreshold); -1 = RTS/CTS disabled * @_net: the network namespace this wiphy currently lives in * @perm_addr: permanent MAC address of this device * @addr_mask: If the device supports multiple MAC addresses by masking, * set this to a mask with variable bits set to 1, e.g. if the last * four bits are variable then set it to 00-00-00-00-00-0f. The actual * variable bits shall be determined by the interfaces added, with * interfaces not matching the mask being rejected to be brought up. * @n_addresses: number of addresses in @addresses. * @addresses: If the device has more than one address, set this pointer * to a list of addresses (6 bytes each). The first one will be used * by default for perm_addr. In this case, the mask should be set to * all-zeroes. In this case it is assumed that the device can handle * the same number of arbitrary MAC addresses. * @registered: protects ->resume and ->suspend sysfs callbacks against * unregister hardware * @debugfsdir: debugfs directory used for this wiphy (ieee80211/<wiphyname>). * It will be renamed automatically on wiphy renames * @dev: (virtual) struct device for this wiphy. The item in * /sys/class/ieee80211/ points to this. You need use set_wiphy_dev() * (see below). * @wext: wireless extension handlers * @priv: driver private data (sized according to wiphy_new() parameter) * @interface_modes: bitmask of interfaces types valid for this wiphy, * must be set by driver * @iface_combinations: Valid interface combinations array, should not * list single interface types. * @n_iface_combinations: number of entries in @iface_combinations array. * @software_iftypes: bitmask of software interface types, these are not * subject to any restrictions since they are purely managed in SW. * @flags: wiphy flags, see &enum wiphy_flags * @regulatory_flags: wiphy regulatory flags, see * &enum ieee80211_regulatory_flags * @features: features advertised to nl80211, see &enum nl80211_feature_flags. * @ext_features: extended features advertised to nl80211, see * &enum nl80211_ext_feature_index. * @bss_priv_size: each BSS struct has private data allocated with it, * this variable determines its size * @max_scan_ssids: maximum number of SSIDs the device can scan for in * any given scan * @max_sched_scan_reqs: maximum number of scheduled scan requests that * the device can run concurrently. * @max_sched_scan_ssids: maximum number of SSIDs the device can scan * for in any given scheduled scan * @max_match_sets: maximum number of match sets the device can handle * when performing a scheduled scan, 0 if filtering is not * supported. * @max_scan_ie_len: maximum length of user-controlled IEs device can * add to probe request frames transmitted during a scan, must not * include fixed IEs like supported rates * @max_sched_scan_ie_len: same as max_scan_ie_len, but for scheduled * scans * @max_sched_scan_plans: maximum number of scan plans (scan interval and number * of iterations) for scheduled scan supported by the device. * @max_sched_scan_plan_interval: maximum interval (in seconds) for a * single scan plan supported by the device. * @max_sched_scan_plan_iterations: maximum number of iterations for a single * scan plan supported by the device. * @coverage_class: current coverage class * @fw_version: firmware version for ethtool reporting * @hw_version: hardware version for ethtool reporting * @max_num_pmkids: maximum number of PMKIDs supported by device * @privid: a pointer that drivers can use to identify if an arbitrary * wiphy is theirs, e.g. in global notifiers * @bands: information about bands/channels supported by this device * * @mgmt_stypes: bitmasks of frame subtypes that can be subscribed to or * transmitted through nl80211, points to an array indexed by interface * type * * @available_antennas_tx: bitmap of antennas which are available to be * configured as TX antennas. Antenna configuration commands will be * rejected unless this or @available_antennas_rx is set. * * @available_antennas_rx: bitmap of antennas which are available to be * configured as RX antennas. Antenna configuration commands will be * rejected unless this or @available_antennas_tx is set. * * @probe_resp_offload: * Bitmap of supported protocols for probe response offloading. * See &enum nl80211_probe_resp_offload_support_attr. Only valid * when the wiphy flag @WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD is set. * * @max_remain_on_channel_duration: Maximum time a remain-on-channel operation * may request, if implemented. * * @wowlan: WoWLAN support information * @wowlan_config: current WoWLAN configuration; this should usually not be * used since access to it is necessarily racy, use the parameter passed * to the suspend() operation instead. * * @ap_sme_capa: AP SME capabilities, flags from &enum nl80211_ap_sme_features. * @ht_capa_mod_mask: Specify what ht_cap values can be over-ridden. * If null, then none can be over-ridden. * @vht_capa_mod_mask: Specify what VHT capabilities can be over-ridden. * If null, then none can be over-ridden. * * @wdev_list: the list of associated (virtual) interfaces; this list must * not be modified by the driver, but can be read with RTNL/RCU protection. * * @max_acl_mac_addrs: Maximum number of MAC addresses that the device * supports for ACL. * * @extended_capabilities: extended capabilities supported by the driver, * additional capabilities might be supported by userspace; these are * the 802.11 extended capabilities ("Extended Capabilities element") * and are in the same format as in the information element. See * 802.11-2012 8.4.2.29 for the defined fields. These are the default * extended capabilities to be used if the capabilities are not specified * for a specific interface type in iftype_ext_capab. * @extended_capabilities_mask: mask of the valid values * @extended_capabilities_len: length of the extended capabilities * @iftype_ext_capab: array of extended capabilities per interface type * @num_iftype_ext_capab: number of interface types for which extended * capabilities are specified separately. * @coalesce: packet coalescing support information * * @vendor_commands: array of vendor commands supported by the hardware * @n_vendor_commands: number of vendor commands * @vendor_events: array of vendor events supported by the hardware * @n_vendor_events: number of vendor events * * @max_ap_assoc_sta: maximum number of associated stations supported in AP mode * (including P2P GO) or 0 to indicate no such limit is advertised. The * driver is allowed to advertise a theoretical limit that it can reach in * some cases, but may not always reach. * * @max_num_csa_counters: Number of supported csa_counters in beacons * and probe responses. This value should be set if the driver * wishes to limit the number of csa counters. Default (0) means * infinite. * @bss_select_support: bitmask indicating the BSS selection criteria supported * by the driver in the .connect() callback. The bit position maps to the * attribute indices defined in &enum nl80211_bss_select_attr. * * @nan_supported_bands: bands supported by the device in NAN mode, a * bitmap of &enum nl80211_band values. For instance, for * NL80211_BAND_2GHZ, bit 0 would be set * (i.e. BIT(NL80211_BAND_2GHZ)). * * @txq_limit: configuration of internal TX queue frame limit * @txq_memory_limit: configuration internal TX queue memory limit * @txq_quantum: configuration of internal TX queue scheduler quantum * * @tx_queue_len: allow setting transmit queue len for drivers not using * wake_tx_queue * * @support_mbssid: can HW support association with nontransmitted AP * @support_only_he_mbssid: don't parse MBSSID elements if it is not * HE AP, in order to avoid compatibility issues. * @support_mbssid must be set for this to have any effect. * * @pmsr_capa: peer measurement capabilities * * @tid_config_support: describes the per-TID config support that the * device has * @tid_config_support.vif: bitmap of attributes (configurations) * supported by the driver for each vif * @tid_config_support.peer: bitmap of attributes (configurations) * supported by the driver for each peer * @tid_config_support.max_retry: maximum supported retry count for * long/short retry configuration * * @max_data_retry_count: maximum supported per TID retry count for * configuration through the %NL80211_TID_CONFIG_ATTR_RETRY_SHORT and * %NL80211_TID_CONFIG_ATTR_RETRY_LONG attributes */ struct wiphy { /* assign these fields before you register the wiphy */ u8 perm_addr[ETH_ALEN]; u8 addr_mask[ETH_ALEN]; struct mac_address *addresses; const struct ieee80211_txrx_stypes *mgmt_stypes; const struct ieee80211_iface_combination *iface_combinations; int n_iface_combinations; u16 software_iftypes; u16 n_addresses; /* Supported interface modes, OR together BIT(NL80211_IFTYPE_...) */ u16 interface_modes; u16 max_acl_mac_addrs; u32 flags, regulatory_flags, features; u8 ext_features[DIV_ROUND_UP(NUM_NL80211_EXT_FEATURES, 8)]; u32 ap_sme_capa; enum cfg80211_signal_type signal_type; int bss_priv_size; u8 max_scan_ssids; u8 max_sched_scan_reqs; u8 max_sched_scan_ssids; u8 max_match_sets; u16 max_scan_ie_len; u16 max_sched_scan_ie_len; u32 max_sched_scan_plans; u32 max_sched_scan_plan_interval; u32 max_sched_scan_plan_iterations; int n_cipher_suites; const u32 *cipher_suites; int n_akm_suites; const u32 *akm_suites; const struct wiphy_iftype_akm_suites *iftype_akm_suites; unsigned int num_iftype_akm_suites; u8 retry_short; u8 retry_long; u32 frag_threshold; u32 rts_threshold; u8 coverage_class; char fw_version[ETHTOOL_FWVERS_LEN]; u32 hw_version; #ifdef CONFIG_PM const struct wiphy_wowlan_support *wowlan; struct cfg80211_wowlan *wowlan_config; #endif u16 max_remain_on_channel_duration; u8 max_num_pmkids; u32 available_antennas_tx; u32 available_antennas_rx; u32 probe_resp_offload; const u8 *extended_capabilities, *extended_capabilities_mask; u8 extended_capabilities_len; const struct wiphy_iftype_ext_capab *iftype_ext_capab; unsigned int num_iftype_ext_capab; const void *privid; struct ieee80211_supported_band *bands[NUM_NL80211_BANDS]; void (*reg_notifier)(struct wiphy *wiphy, struct regulatory_request *request); /* fields below are read-only, assigned by cfg80211 */ const struct ieee80211_regdomain __rcu *regd; struct device dev; bool registered; struct dentry *debugfsdir; const struct ieee80211_ht_cap *ht_capa_mod_mask; const struct ieee80211_vht_cap *vht_capa_mod_mask; struct list_head wdev_list; possible_net_t _net; #ifdef CONFIG_CFG80211_WEXT const struct iw_handler_def *wext; #endif const struct wiphy_coalesce_support *coalesce; const struct wiphy_vendor_command *vendor_commands; const struct nl80211_vendor_cmd_info *vendor_events; int n_vendor_commands, n_vendor_events; u16 max_ap_assoc_sta; u8 max_num_csa_counters; u32 bss_select_support; u8 nan_supported_bands; u32 txq_limit; u32 txq_memory_limit; u32 txq_quantum; unsigned long tx_queue_len; u8 support_mbssid:1, support_only_he_mbssid:1; const struct cfg80211_pmsr_capabilities *pmsr_capa; struct { u64 peer, vif; u8 max_retry; } tid_config_support; u8 max_data_retry_count; char priv[] __aligned(NETDEV_ALIGN); }; static inline struct net *wiphy_net(struct wiphy *wiphy) { return read_pnet(&wiphy->_net); } static inline void wiphy_net_set(struct wiphy *wiphy, struct net *net) { write_pnet(&wiphy->_net, net); } /** * wiphy_priv - return priv from wiphy * * @wiphy: the wiphy whose priv pointer to return * Return: The priv of @wiphy. */ static inline void *wiphy_priv(struct wiphy *wiphy) { BUG_ON(!wiphy); return &wiphy->priv; } /** * priv_to_wiphy - return the wiphy containing the priv * * @priv: a pointer previously returned by wiphy_priv * Return: The wiphy of @priv. */ static inline struct wiphy *priv_to_wiphy(void *priv) { BUG_ON(!priv); return container_of(priv, struct wiphy, priv); } /** * set_wiphy_dev - set device pointer for wiphy * * @wiphy: The wiphy whose device to bind * @dev: The device to parent it to */ static inline void set_wiphy_dev(struct wiphy *wiphy, struct device *dev) { wiphy->dev.parent = dev; } /** * wiphy_dev - get wiphy dev pointer * * @wiphy: The wiphy whose device struct to look up * Return: The dev of @wiphy. */ static inline struct device *wiphy_dev(struct wiphy *wiphy) { return wiphy->dev.parent; } /** * wiphy_name - get wiphy name * * @wiphy: The wiphy whose name to return * Return: The name of @wiphy. */ static inline const char *wiphy_name(const struct wiphy *wiphy) { return dev_name(&wiphy->dev); } /** * wiphy_new_nm - create a new wiphy for use with cfg80211 * * @ops: The configuration operations for this device * @sizeof_priv: The size of the private area to allocate * @requested_name: Request a particular name. * NULL is valid value, and means use the default phy%d naming. * * Create a new wiphy and associate the given operations with it. * @sizeof_priv bytes are allocated for private use. * * Return: A pointer to the new wiphy. This pointer must be * assigned to each netdev's ieee80211_ptr for proper operation. */ struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, const char *requested_name); /** * wiphy_new - create a new wiphy for use with cfg80211 * * @ops: The configuration operations for this device * @sizeof_priv: The size of the private area to allocate * * Create a new wiphy and associate the given operations with it. * @sizeof_priv bytes are allocated for private use. * * Return: A pointer to the new wiphy. This pointer must be * assigned to each netdev's ieee80211_ptr for proper operation. */ static inline struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) { return wiphy_new_nm(ops, sizeof_priv, NULL); } /** * wiphy_register - register a wiphy with cfg80211 * * @wiphy: The wiphy to register. * * Return: A non-negative wiphy index or a negative error code. */ int wiphy_register(struct wiphy *wiphy); /** * wiphy_unregister - deregister a wiphy from cfg80211 * * @wiphy: The wiphy to unregister. * * After this call, no more requests can be made with this priv * pointer, but the call may sleep to wait for an outstanding * request that is being handled. */ void wiphy_unregister(struct wiphy *wiphy); /** * wiphy_free - free wiphy * * @wiphy: The wiphy to free */ void wiphy_free(struct wiphy *wiphy); /* internal structs */ struct cfg80211_conn; struct cfg80211_internal_bss; struct cfg80211_cached_keys; struct cfg80211_cqm_config; /** * struct wireless_dev - wireless device state * * For netdevs, this structure must be allocated by the driver * that uses the ieee80211_ptr field in struct net_device (this * is intentional so it can be allocated along with the netdev.) * It need not be registered then as netdev registration will * be intercepted by cfg80211 to see the new wireless device. * * For non-netdev uses, it must also be allocated by the driver * in response to the cfg80211 callbacks that require it, as * there's no netdev registration in that case it may not be * allocated outside of callback operations that return it. * * @wiphy: pointer to hardware description * @iftype: interface type * @list: (private) Used to collect the interfaces * @netdev: (private) Used to reference back to the netdev, may be %NULL * @identifier: (private) Identifier used in nl80211 to identify this * wireless device if it has no netdev * @current_bss: (private) Used by the internal configuration code * @chandef: (private) Used by the internal configuration code to track * the user-set channel definition. * @preset_chandef: (private) Used by the internal configuration code to * track the channel to be used for AP later * @bssid: (private) Used by the internal configuration code * @ssid: (private) Used by the internal configuration code * @ssid_len: (private) Used by the internal configuration code * @mesh_id_len: (private) Used by the internal configuration code * @mesh_id_up_len: (private) Used by the internal configuration code * @wext: (private) Used by the internal wireless extensions compat code * @wext.ibss: (private) IBSS data part of wext handling * @wext.connect: (private) connection handling data * @wext.keys: (private) (WEP) key data * @wext.ie: (private) extra elements for association * @wext.ie_len: (private) length of extra elements * @wext.bssid: (private) selected network BSSID * @wext.ssid: (private) selected network SSID * @wext.default_key: (private) selected default key index * @wext.default_mgmt_key: (private) selected default management key index * @wext.prev_bssid: (private) previous BSSID for reassociation * @wext.prev_bssid_valid: (private) previous BSSID validity * @use_4addr: indicates 4addr mode is used on this interface, must be * set by driver (if supported) on add_interface BEFORE registering the * netdev and may otherwise be used by driver read-only, will be update * by cfg80211 on change_interface * @mgmt_registrations: list of registrations for management frames * @mgmt_registrations_need_update: mgmt registrations were updated, * need to propagate the update to the driver * @mtx: mutex used to lock data in this struct, may be used by drivers * and some API functions require it held * @beacon_interval: beacon interval used on this device for transmitting * beacons, 0 when not valid * @address: The address for this device, valid only if @netdev is %NULL * @is_running: true if this is a non-netdev device that has been started, e.g. * the P2P Device. * @cac_started: true if DFS channel availability check has been started * @cac_start_time: timestamp (jiffies) when the dfs state was entered. * @cac_time_ms: CAC time in ms * @ps: powersave mode is enabled * @ps_timeout: dynamic powersave timeout * @ap_unexpected_nlportid: (private) netlink port ID of application * registered for unexpected class 3 frames (AP mode) * @conn: (private) cfg80211 software SME connection state machine data * @connect_keys: (private) keys to set after connection is established * @conn_bss_type: connecting/connected BSS type * @conn_owner_nlportid: (private) connection owner socket port ID * @disconnect_wk: (private) auto-disconnect work * @disconnect_bssid: (private) the BSSID to use for auto-disconnect * @ibss_fixed: (private) IBSS is using fixed BSSID * @ibss_dfs_possible: (private) IBSS may change to a DFS channel * @event_list: (private) list for internal event processing * @event_lock: (private) lock for event list * @owner_nlportid: (private) owner socket port ID * @nl_owner_dead: (private) owner socket went away * @cqm_config: (private) nl80211 RSSI monitor state * @pmsr_list: (private) peer measurement requests * @pmsr_lock: (private) peer measurements requests/results lock * @pmsr_free_wk: (private) peer measurements cleanup work * @unprot_beacon_reported: (private) timestamp of last * unprotected beacon report */ struct wireless_dev { struct wiphy *wiphy; enum nl80211_iftype iftype; /* the remainder of this struct should be private to cfg80211 */ struct list_head list; struct net_device *netdev; u32 identifier; struct list_head mgmt_registrations; u8 mgmt_registrations_need_update:1; struct mutex mtx; bool use_4addr, is_running; u8 address[ETH_ALEN] __aligned(sizeof(u16)); /* currently used for IBSS and SME - might be rearranged later */ u8 ssid[IEEE80211_MAX_SSID_LEN]; u8 ssid_len, mesh_id_len, mesh_id_up_len; struct cfg80211_conn *conn; struct cfg80211_cached_keys *connect_keys; enum ieee80211_bss_type conn_bss_type; u32 conn_owner_nlportid; struct work_struct disconnect_wk; u8 disconnect_bssid[ETH_ALEN]; struct list_head event_list; spinlock_t event_lock; struct cfg80211_internal_bss *current_bss; /* associated / joined */ struct cfg80211_chan_def preset_chandef; struct cfg80211_chan_def chandef; bool ibss_fixed; bool ibss_dfs_possible; bool ps; int ps_timeout; int beacon_interval; u32 ap_unexpected_nlportid; u32 owner_nlportid; bool nl_owner_dead; bool cac_started; unsigned long cac_start_time; unsigned int cac_time_ms; #ifdef CONFIG_CFG80211_WEXT /* wext data */ struct { struct cfg80211_ibss_params ibss; struct cfg80211_connect_params connect; struct cfg80211_cached_keys *keys; const u8 *ie; size_t ie_len; u8 bssid[ETH_ALEN]; u8 prev_bssid[ETH_ALEN]; u8 ssid[IEEE80211_MAX_SSID_LEN]; s8 default_key, default_mgmt_key; bool prev_bssid_valid; } wext; #endif struct cfg80211_cqm_config *cqm_config; struct list_head pmsr_list; spinlock_t pmsr_lock; struct work_struct pmsr_free_wk; unsigned long unprot_beacon_reported; }; static inline u8 *wdev_address(struct wireless_dev *wdev) { if (wdev->netdev) return wdev->netdev->dev_addr; return wdev->address; } static inline bool wdev_running(struct wireless_dev *wdev) { if (wdev->netdev) return netif_running(wdev->netdev); return wdev->is_running; } /** * wdev_priv - return wiphy priv from wireless_dev * * @wdev: The wireless device whose wiphy's priv pointer to return * Return: The wiphy priv of @wdev. */ static inline void *wdev_priv(struct wireless_dev *wdev) { BUG_ON(!wdev); return wiphy_priv(wdev->wiphy); } /** * DOC: Utility functions * * cfg80211 offers a number of utility functions that can be useful. */ /** * ieee80211_channel_equal - compare two struct ieee80211_channel * * @a: 1st struct ieee80211_channel * @b: 2nd struct ieee80211_channel * Return: true if center frequency of @a == @b */ static inline bool ieee80211_channel_equal(struct ieee80211_channel *a, struct ieee80211_channel *b) { return (a->center_freq == b->center_freq && a->freq_offset == b->freq_offset); } /** * ieee80211_channel_to_khz - convert ieee80211_channel to frequency in KHz * @chan: struct ieee80211_channel to convert * Return: The corresponding frequency (in KHz) */ static inline u32 ieee80211_channel_to_khz(const struct ieee80211_channel *chan) { return MHZ_TO_KHZ(chan->center_freq) + chan->freq_offset; } /** * ieee80211_s1g_channel_width - get allowed channel width from @chan * * Only allowed for band NL80211_BAND_S1GHZ * @chan: channel * Return: The allowed channel width for this center_freq */ enum nl80211_chan_width ieee80211_s1g_channel_width(const struct ieee80211_channel *chan); /** * ieee80211_channel_to_freq_khz - convert channel number to frequency * @chan: channel number * @band: band, necessary due to channel number overlap * Return: The corresponding frequency (in KHz), or 0 if the conversion failed. */ u32 ieee80211_channel_to_freq_khz(int chan, enum nl80211_band band); /** * ieee80211_channel_to_frequency - convert channel number to frequency * @chan: channel number * @band: band, necessary due to channel number overlap * Return: The corresponding frequency (in MHz), or 0 if the conversion failed. */ static inline int ieee80211_channel_to_frequency(int chan, enum nl80211_band band) { return KHZ_TO_MHZ(ieee80211_channel_to_freq_khz(chan, band)); } /** * ieee80211_freq_khz_to_channel - convert frequency to channel number * @freq: center frequency in KHz * Return: The corresponding channel, or 0 if the conversion failed. */ int ieee80211_freq_khz_to_channel(u32 freq); /** * ieee80211_frequency_to_channel - convert frequency to channel number * @freq: center frequency in MHz * Return: The corresponding channel, or 0 if the conversion failed. */ static inline int ieee80211_frequency_to_channel(int freq) { return ieee80211_freq_khz_to_channel(MHZ_TO_KHZ(freq)); } /** * ieee80211_get_channel_khz - get channel struct from wiphy for specified * frequency * @wiphy: the struct wiphy to get the channel for * @freq: the center frequency (in KHz) of the channel * Return: The channel struct from @wiphy at @freq. */ struct ieee80211_channel * ieee80211_get_channel_khz(struct wiphy *wiphy, u32 freq); /** * ieee80211_get_channel - get channel struct from wiphy for specified frequency * * @wiphy: the struct wiphy to get the channel for * @freq: the center frequency (in MHz) of the channel * Return: The channel struct from @wiphy at @freq. */ static inline struct ieee80211_channel * ieee80211_get_channel(struct wiphy *wiphy, int freq) { return ieee80211_get_channel_khz(wiphy, MHZ_TO_KHZ(freq)); } /** * cfg80211_channel_is_psc - Check if the channel is a 6 GHz PSC * @chan: control channel to check * * The Preferred Scanning Channels (PSC) are defined in * Draft IEEE P802.11ax/D5.0, 26.17.2.3.3 */ static inline bool cfg80211_channel_is_psc(struct ieee80211_channel *chan) { if (chan->band != NL80211_BAND_6GHZ) return false; return ieee80211_frequency_to_channel(chan->center_freq) % 16 == 5; } /** * ieee80211_get_response_rate - get basic rate for a given rate * * @sband: the band to look for rates in * @basic_rates: bitmap of basic rates * @bitrate: the bitrate for which to find the basic rate * * Return: The basic rate corresponding to a given bitrate, that * is the next lower bitrate contained in the basic rate map, * which is, for this function, given as a bitmap of indices of * rates in the band's bitrate table. */ struct ieee80211_rate * ieee80211_get_response_rate(struct ieee80211_supported_band *sband, u32 basic_rates, int bitrate); /** * ieee80211_mandatory_rates - get mandatory rates for a given band * @sband: the band to look for rates in * @scan_width: width of the control channel * * This function returns a bitmap of the mandatory rates for the given * band, bits are set according to the rate position in the bitrates array. */ u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband, enum nl80211_bss_scan_width scan_width); /* * Radiotap parsing functions -- for controlled injection support * * Implemented in net/wireless/radiotap.c * Documentation in Documentation/networking/radiotap-headers.rst */ struct radiotap_align_size { uint8_t align:4, size:4; }; struct ieee80211_radiotap_namespace { const struct radiotap_align_size *align_size; int n_bits; uint32_t oui; uint8_t subns; }; struct ieee80211_radiotap_vendor_namespaces { const struct ieee80211_radiotap_namespace *ns; int n_ns; }; /** * struct ieee80211_radiotap_iterator - tracks walk thru present radiotap args * @this_arg_index: index of current arg, valid after each successful call * to ieee80211_radiotap_iterator_next() * @this_arg: pointer to current radiotap arg; it is valid after each * call to ieee80211_radiotap_iterator_next() but also after * ieee80211_radiotap_iterator_init() where it will point to * the beginning of the actual data portion * @this_arg_size: length of the current arg, for convenience * @current_namespace: pointer to the current namespace definition * (or internally %NULL if