[LU-14489] "lfs find --mdt-count +1" fails with "Operation not permitted"

Duplicate — Fri, 17 Sep 2021 22:27:38 +0000

It appears that "lfs find $MOUNT -type d --mdt-count +1" aborts when it hits non-striped directories rather than ignoring the error and continuing to search the directory tree:

# lfs find /mnt/testfs -type d --mdt-count +1
lfs: failed for '/mnt/testfs': Operation not permitted
# lfs mkdir -c 2 /mnt/testfs/dne
# lfs find /mnt/testfs/dne -type d --mdt-count +1
/mnt/testfs/dne
# mkdir /mnt/testfs/dne/nondne
# lfs find /mnt/testfs/dne -type d --mdt-count +1
/mnt/testfs/dne
lfs: failed for '/mnt/testfs/dne': Operation not permitted

Running strace on the find shows that it is returning -61 = ENODATA:

open("/mnt/testfs/dne", O_RDONLY|O_NONBLOCK|O_DIRECTORY) = 3
open("/mnt/testfs/dne", O_RDONLY|O_NONBLOCK|O_NOFOLLOW) = 4
close(3)                                = 0
ioctl(4, LL_IOC_LMV_GETSTRIPE, 0x1751170) = 0
ioctl(4, LL_IOC_MDC_GETINFO_V2, 0x1741040) = 0
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 4), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5
write(1, "/mnt/testfs/dne\n", 16)       = 16
/mnt/testfs/dne
fstat(4, {st_mode=S_IFDIR|0755, st_size=8192, ...}) = 0
fcntl(4, F_GETFL)                       = 0x28800 (flags O_RDONLY|O_NONBLOCK|O_L
fcntl(4, F_SETFD, FD_CLOEXEC)           = 0
getdents(4, /* 3 entries */, 32768)     = 80
open("/mnt/testfs/dne/nondne", O_RDONLY|O_NONBLOCK|O_DIRECTORY) = 3
open("/mnt/testfs/dne/nondne", O_RDONLY|O_NONBLOCK|O_NOFOLLOW) = 5
close(3)                                = 0
ioctl(5, LL_IOC_LMV_GETSTRIPE, 0x1751170) = -1 ENODATA
close(5)                                = 0
getdents(4, /* 0 entries */, 32768)     = 0
close(4)                                = 0
write(2, "lfs: failed for '/mnt/testfs/dne"..., 59) = 59
lfs: failed for '/mnt/testfs/dne

Whamcloud Community JIRA

[LU-14489] "lfs find --mdt-count +1" fails with "Operation not permitted"