[LU-17635] LFSCK doesn't detect missing LMV hash

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.16.0
• Severity: 3
• Assignee: WC Triage
• Reporter: Alexander Zarochentsev

Description

I see a 2.15.3-based system in a similar to LU-16717 but not exactly the same state, an interrupted mdt->mdt migration left a directory in an inaccessible state:

# lfs getdirstripe .
lmv_stripe_count: 3 lmv_stripe_offset: 0 lmv_hash_type: none,migrating
mdtidx FID[seq:oid:ver]
0 [0x20002f9d0:0x6a:0x0]
1 [0x240025042:0x62:0x0]
1 [0x240025064:0x8e32:0x0]
# touch test
touch: cannot touch 'test': Bad file descriptor

unlike the LU-16717 case, the directory has not "bad_type" flag and the flag did not appear after an LFSCK run. So I think the patches from LU-16717 would not help as the checks inside them need "bad_type" flag to be set.

Issue Links

• is related to: LU-16717 Directory restripe breaking lmv stripe settings