libcephfs: client needs to update the mtime and change attr when snaps are created and deleted
This issue was identified by Jeff here, https://bugzilla.redhat.com/show_bug.cgi?id=1975689#c21
The libcephfs client doesn't update mtime and change attribute when snaps are create or deleted. This results in NFS clients not being able to list CephFS snapshots within a CephFS NFS-Ganesha export correctly.
See explanation here, https://bugzilla.redhat.com/show_bug.cgi?id=1975689#c21
#8 Updated by Venky Shankar 2 months ago
Ramana, never mind. I see its for .snap directory rather that its parent. The thing is, attrs for .snap are initialized from its parent and never change (until the inode is trimmed and the snap directory is accessed again).
PR https://github.com/ceph/ceph/pull/48086 improves this behavior by updating attrs (including POSIX ACLs) for .snap directory when its parent directory attrs change. However, that is not enough to fix this issue.