[LU-11380] IOC_MDC_GETFILEINFO returns garbage stripe info for files with long names but no striping

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Labels: HSM
• Severity: 3
• Assignee: John Hammond
• Reporter: John Hammond

Description

o:~# cd /mnt//lustre
o:lustre# mcreate ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
o:lustre# lfs getstripe ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff has no stripe info
o:lustre# lfs find --stripe-count +30 .
./ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
o:lustre# lfs find --stripe-count +10000 .
./ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff

In ll_dir_ioctl() we should at least zero out lmm_magic when the file has not stripe info.

Issue Links

• is related to: LU-7557 Add fid_to_string and string_to_fid functions
• is related to: LU-14429 fid2path cache in liblustreapi
• is related to: LU-11379 HSM Copytool Performance Improvements