[LU-5017] "lfs mv" loses file attributes during migration

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.6.0, Lustre 2.8.0
• Affects Version/s: Lustre 2.6.0
• Labels: dne2
• Severity: 3
• Assignee: Di Wang
• Reporter: Andreas Dilger

Description

Migrating a directory tree using "lfs mv" drops the file attributes stored on both files and directories.

For example, setting the "noatime" attribute on a directory and a file therein, and then migrating the directory to another MDT clears this flag:

[root@sookie-gig tests]# lsattr -a /mnt/testfs/d0.new
---------------- /mnt/testfs/d0.new/.
---------------- /mnt/testfs/d0.new/..
---------------- /mnt/testfs/d0.new/f0.new
[root@sookie-gig tests]# chattr +SAD /mnt/testfs/d0.new /mnt/testfs/d0.new/f0.new
[root@sookie-gig tests]# lsattr -a /mnt/testfs/d0.new
--SD---A-------- /mnt/testfs/d0.new/.
---------------- /mnt/testfs/d0.new/..
--S----A-------- /mnt/testfs/d0.new/f0.new
[root@sookie-gig tests]# lfs mv -M 1 /mnt/testfs/d0.new
[root@sookie-gig tests]# lsattr -a /mnt/testfs/d0.new
---------------- /mnt/testfs/d0.new/f0.new
---------------- /mnt/testfs/d0.new/.
---------------- /mnt/testfs/d0.new/..

Fortunately, the IMMUTABLE and APPEND flags cannot be lost in this manner because the MDS blocks files/directories with these attributes from being migrated, so this only affects secondary attributes (noatime, sync write, dirsync).

Issue Links

• is related to: LU-5016 clean up use of la_attr for non-attribute flags