[LU-15180] OST object missing parent fid

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Affects Version/s: Lustre 2.12.4
• Severity: 3
• Assignee: Hongchao Zhang
• Reporter: Mahmoud Hanafi

Description

We have files who's object are missing parent fid. For example this file:

# lfs getstripe img.0291328.ppm# lfs getstripe 
img.0291328.ppmimg.0291328.ppmlmm_stripe_count:  4lmm_stripe_size:   1048576lmm_pattern:       raid0lmm_layout_gen:    0lmm_stripe_offset: 68 obdidx  objid  objid  group     68        3671546      0x3805fa              0     80        5285906      0x50a812              0     97        5277923      0x5088e3              0    122        6631005      0x652e5d              0

When we look at the first object on ost68 we see the parrent fid is missing.

# debugfs -c -R "stat /O/0/d26/3671546" /dev/mapper/nbp1_6-OST68
debugfs 1.45.2.wc1 (27-May-2019)
/dev/mapper/nbp1_6-OST68: catastrophic mode - not reading inode or group bitmaps
Inode: 378232   Type: regular    Mode:  01666   Flags: 0x80000
Generation: 1064600594    Version: 0x0000001b:00041e9e
User:  4806   Group:  1128   Project:     0   Size: 2097152
File ACL: 0
Links: 1   Blockcount: 4096
Fragment:  Address: 0    Number: 0    Size: 0
 ctime: 0x5d4f4613:00000000 -- Sat Aug 10 15:32:51 2019
 atime: 0x00000000:00000000 -- Wed Dec 31 16:00:00 1969
 mtime: 0x5d4f4613:00000000 -- Sat Aug 10 15:32:51 2019
crtime: 0x5d4f4187:7a7cf08c -- Sat Aug 10 15:13:27 2019
Size of extra inode fields: 32
Extended attributes:
  trusted.lma (64)
  lma: fid=[0x100440000:0x3805fa:0x0] compat=8 incompat=0
  fid: parent=[0:0x0:0x0] stripe=0 stripe_size=0 stripe_count=0
EXTENTS:
(0-511):419245056-419245567

How can we fix the object missing parent fid.