r0 = socket$nl_netfilter(0x10, 0x3, 0xc)
ioctl$BTRFS_IOC_WAIT_SYNC(0xffffffffffffffff, 0x40089416, 0x0)
sendmsg$IPSET_CMD_SAVE(r0, &(0x7f00000035c0)={&(0x7f0000003500), 0xc, &(0x7f0000003580)={&(0x7f0000003540)={0x1c, 0x8, 0x6, 0x3, 0x0, 0x0, {0x0, 0x0, 0x3}, [@IPSET_ATTR_PROTOCOL={0x5}]}, 0x1c}}, 0x0)