linux-kernel - [PATCH 3.12 063/116] NFSv4: dont reprocess cached open CLAIM

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Date:	Tue, 26 Nov 2013 16:57:16 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Weston Andros Adamson <dros@...app.com>,
	Trond Myklebust <Trond.Myklebust@...app.com>
Subject: [PATCH 3.12 063/116] NFSv4: dont reprocess cached open CLAIM_PREVIOUS

3.12-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Weston Andros Adamson <dros@...app.com>

commit d2bfda2e7aa036f90ccea610a657064b1e267913 upstream.

Cached opens have already been handled by _nfs4_opendata_reclaim_to_nfs4_state
and can safely skip being reprocessed, but must still call update_open_stateid
to make sure that all active fmodes are recovered.

Signed-off-by: Weston Andros Adamson <dros@...app.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@...app.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/nfs/nfs4proc.c |   12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1317,10 +1317,13 @@ _nfs4_opendata_reclaim_to_nfs4_state(str
 	struct nfs4_state *state = data->state;
 	int ret;
 
-	/* allow cached opens (!rpc_done && !rpc_status) */
-	if (!data->rpc_done && data->rpc_status) {
-		ret = data->rpc_status;
-		goto err;
+	if (!data->rpc_done) {
+		if (data->rpc_status) {
+			ret = data->rpc_status;
+			goto err;
+		}
+		/* cached opens have already been processed */
+		goto update;
 	}
 
 	ret = -ENOMEM;
@@ -1336,6 +1339,7 @@ _nfs4_opendata_reclaim_to_nfs4_state(str
 
 	if (data->o_res.delegation_type != 0)
 		nfs4_opendata_check_deleg(data, state);
+update:
 	update_open_stateid(state, &data->o_res.stateid, NULL,
 			    data->o_arg.fmode);
 


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