From 63d63cbf5e03f47c99baa0a1ba1c345fe426e3bd Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Thu, 22 Sep 2016 13:39:01 -0400
Subject: [PATCH] NFSv4.1: Don't recheck delegations that have already been
checked
Ensure we don't spam the server with test_stateid() calls for
delegations that have already been checked.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Tested-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
---
fs/nfs/nfs4proc.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 083786aad83ce4..dfa46e49e3563e 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2459,6 +2459,11 @@ static void nfs41_check_delegation_stateid(struct nfs4_state *state)
return;
}
+ if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags)) {
+ rcu_read_unlock();
+ return;
+ }
+
cred = get_rpccred(delegation->cred);
rcu_read_unlock();
status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
--
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