tree ad3822cd62bc216375fac05bd1cfb3a45ab837bc
parent 1116e0e372eb16dd907ec571ce5d4af325c55c10
author Jeff Layton <jlayton@kernel.org> 1724682754 -0400
committer Chuck Lever <chuck.lever@oracle.com> 1724713440 -0400

fs/nfsd: fix update of inode attrs in CB_GETATTR

Currently, we copy the mtime and ctime to the in-core inode and then
mark the inode dirty. This is fine for certain types of filesystems, but
not all. Some require a real setattr to properly change these values
(e.g. ceph or reexported NFS).

Fix this code to call notify_change() instead, which is the proper way
to effect a setattr. There is one problem though:

In this case, the client is holding a write delegation and has sent us
attributes to update our cache. We don't want to break the delegation
for this since that would defeat the purpose. Add a new ATTR_DELEG flag
that makes notify_change bypass the try_break_deleg call.

Fixes: c5967721e106 ("NFSD: handle GETATTR conflict with write delegation")
Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>