[LU-19123] setting projid on a dangling or self-referential symlink fails

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.17.0
• Affects Version/s: Lustre 2.16.0
• Severity: 3
• Assignee: Andreas Dilger
• Reporter: Andreas Dilger

Description

Running "lfs project -p" on a dangling symlink or a symlink that refers to itself fails:

# ln -s foo /myth/tmp/projid-900/symlink
# lfs project -p 1000 /myth/tmp/projid-900/symlink
lfs: failed to stat '/myth/tmp/projid-900/symlink': No such file or directory
# ln -s symlink3 /myth/tmp/projid-900/symlink3
# lfs project -p 1000 /myth/tmp/projid-900/symlink3
lfs: failed to stat '/myth/tmp/projid-900/symlink3': Too many levels of symbolic links

It should be possible to fix this by using open(O_NOFOLLOW) to open the symlink.

Issue Links

• is related to: LU-11872 Request for option not to follow symlink when setting project ID