[LU-19833] Adding or modifying ACL doesn't generate a XATTR changelog

• Type: Bug
• Resolution: Unresolved
• Priority: Medium
• Severity: 3
• Assignee: Gauthier EVRAERD
• Reporter: Gauthier EVRAERD

Description

Adding, modifying, or deleting a file’s ACLs does not generate a XATTR changelogs. Only a a CTIME changelog is generated when ACLs are added to a file. However, for default ACLs, this works correctly.

Here is an example:

$ touch /mnt/lustre/file

$ mkdir /mnt/lustre/dir

$ lctl --device lustre-MDT0000 changelog_register

$ setfacl -m u:root:r /mnt/lustre/file

$ setfacl -d -m u:root:r /mnt/lustre/dir

$ lfs changelog lustre-MDT0000
9 18CTIME 13:55:42.524126315 2026.01.28 0x4 t=[0x200000401:0x3:0x0] j=setfacl.0 ef=0xf u=0:0 nid=0@lo
10 15XATTR 13:55:50.350061752 2026.01.28 0x0 t=[0x200000401:0x4:0x0] j=setfacl.0 ef=0xf u=0:0 nid=0@lo x=system.posix_acl_default

$ lfs path2fid /mnt/lustre/dir /mnt/lustre/file
/mnt/lustre/dir: [0x200000401:0x4:0x0]
/mnt/lustre/file: [0x200000401:0x3:0x0]