[LU-18082] Support paths longer than PATH_MAX for fid2path

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Affects Version/s: Lustre 2.16.0
• Labels: patch utils
• Severity: 3
• Assignee: Sebastien Buisson
• Reporter: Sebastien Buisson

Description

PATH_MAX affects the path length of a single pathname, but it is possible to exceed this by eg. creating a subdirectory tree, then cd into it, then create a deep tree below this using a relative pathname.

So 'lfs fid2path' should not limit its output buffer to PATH_MAX.

Issue Links

• is related to: LU-14719 "lfs migrate -m" creates broken agent inodes when target MDT full