mknod$loop(&(0x7f0000000400)='./file0\x00', 0x6000, 0x0)
r0 = creat(&(0x7f00000000c0)='./file0\x00', 0x0)
ioctl$BTRFS_IOC_LOGICAL_INO(r0, 0xc0389424, &(0x7f0000000100)={0x4dca, 0x18, '\x00', 0x1, &(0x7f0000000080)=[0x0, 0x0, 0x0]})
ioctl$BLKTRACESETUP(r0, 0xc0481273, &(0x7f0000000000)={'\x00', 0x0, 0x20000ff, 0x1})