nfsd: apply the notify mask to the delegation when requested

If the client requests a directory delegation with notifications
enabled, set the appropriate return mask in gddr_notification[0]. This
will ensure the lease acquisition sets the appropriate ignore mask.

Also store the granted mask in the delegation's dl_notify_mask field, so
that the CB_NOTIFY encoder can later tell which notifications the client
was granted.

If the client doesn't set NOTIFY4_GFLAG_EXTEND, then don't offer any
notifications, as nfsd won't provide directory offset information, and
"classic" notifications require them.

Similarly, if the client sets GFLAG_EXTEND | CFLAG_ORDER, then zero out
the notification mask. The Linux server can't provide the necessary
ordering info to those clients.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://patch.msgid.link/20260616-dir-deleg-v7-11-6cbc7eac0ade@kernel.org
Signed-off-by: Chuck Lever <cel@kernel.org>

0 files changed, 0 insertions, 0 deletions