From a457974f1b9524a6e7d0a0be10df760e7802d32f Mon Sep 17 00:00:00 2001
From: Andrew Elble <aweits@rit.edu>
Date: Mon, 31 Aug 2015 12:06:41 -0400
Subject: [PATCH] nfsd: deal with DELEGRETURN racing with CB_RECALL
We have observed the server sending recalls for delegation stateids
that have already been successfully returned. Change
nfsd4_cb_recall_done() to return success if the client has returned
the delegation. While this does not completely eliminate the sending
of recalls for delegations that have already been returned, this
does prevent unnecessarily declaring the callback path to be down.
Reported-by: Eric Meddaugh <etmsys@rit.edu>
Signed-off-by: Andrew Elble <aweits@rit.edu>
Acked-by: Jeff Layton <jlayton@poochiereds.net>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
---
fs/nfsd/nfs4state.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 08746ec1d44a..0f1d5691b795 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -3510,6 +3510,9 @@ static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
{
struct nfs4_delegation *dp = cb_to_delegation(cb);
+ if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID)
+ return 1;
+
switch (task->tk_status) {
case 0:
return 1;