[LU-6213] 'tar -c' returns status 1 if HSM released files were encountered

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.8.0
• Affects Version/s: Lustre 2.7.0
• Labels: hsm
• Severity: 3
• Assignee: John Hammond
• Reporter: John Hammond

Description

HSM restore causes some file attributes to change (blocks and maybe ctime). tar detects this and reports "tar: f0: file changed as we read it" and will continue archiving but return 1 on exit. So according to its exit status it has failed but the archive contents are correct.

# echo XXXXXXXXXXXXXXXXXXXXXXXX > f0
# echo ZZZZZZZZZZZZZZZZZZZ > f1
# lfs hsm_archive f0
# lfs hsm_state f0
f0: (0x00000009) exists archived, archive_id:1
# lfs hsm_release f0
# lfs hsm_state f0
f0: (0x0000000d) released exists archived, archive_id:1
# tar -cf /tmp/0.tar f0 f1
tar: f0: file changed as we read it
# tar -tvf /tmp/0.tar
-rw-r--r-- root/root        25 2015-02-05 10:31 f0
-rw-r--r-- root/root        20 2015-02-05 10:34 f1
# rm f0 f1
# tar -xf /tmp/0.tar
# ls -l
total 1
-rw-r--r-- 1 root root 25 Feb  5 10:31 f0
-rw-r--r-- 1 root root 20 Feb  5 10:34 f1
# cat f0
XXXXXXXXXXXXXXXXXXXXXXXX
# cat f1
ZZZZZZZZZZZZZZZZZZZ