[LU-13357] striped directory doesn't support lookup

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.14.0, Lustre 2.12.6
• Affects Version/s: Lustre 2.12.0
• Severity: 3
• Assignee: Lai Siyao
• Reporter: Lai Siyao

Description

The dt_index_operations::dio_lookup() function is not implemented for striped directory, which will cause subdirectory mount from a striped directory fail.

# cd /system/

### Setup test directories
# lfs mkdir -c 1 -i 0 dir-mdt0-nostripe
# lfs mkdir -c 1 -i 1 dir-mdt1-nostripe
# lfs mkdir -c 2 dir-stripe
# mkdir dir-mdt0-nostripe/mountme
# mkdir dir-mdt1-nostripe/mountme
# mkdir dir-stripe/mountme

### Attempt mounts
# cd /tmp/lustremnt
# mkdir mount-dir

### Successful mounts from the non-striped directories on either MDT
# mount -t lustre 10.6.254.71@o2ib2:10.6.254.72@o2ib2:10.6.254.76@o2ib2:10.6.254.77@o2ib2:/testsys/dir-mdt0-nostripe/mountme mount-dir
# umount
# mount -t lustre 10.6.254.71@o2ib2:10.6.254.72@o2ib2:10.6.254.76@o2ib2:10.6.254.77@o2ib2:/testsys/dir-mdt1-nostripe/mountme mount-dir
# umount

### Fails to mount from striped directory
# mount -t lustre 10.6.254.71@o2ib2:10.6.254.72@o2ib2:10.6.254.76@o2ib2:10.6.254.77@o2ib2:/testsys/dir-stripe/mountme mount-dir

mount.lustre: mount 10.6.254.71@o2ib2:10.6.254.72@o2ib2:10.6.254.76@o2ib2:10.6.254.77@o2ib2:/testsys/dir-stripe/mountme at /mnt/mount-dir failed: No such file or directory
Is the MGS specification correct?
Is the filesystem name correct?
If upgrading, is the copied client log valid? (see upgrade docs)

Issue Links

• is duplicated by: LU-9460 lustre client mount fail if the nodemap fileset path are striped.
• is related to: LU-13664 sanity-lfsck test_31d: FAIL: (8) Fail to stat /mnt/lustre/d31d.sanity-lfsck/striped_dir/dummy