linux-kernel - [PATCH 4.9 066/108] nfs: Fix "Dont increment lock sequence ID after NFS4ERR

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Message-Id: <20170615175340.317631079@linuxfoundation.org>
Date:   Thu, 15 Jun 2017 19:53:12 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Chuck Lever <chuck.lever@...cle.com>,
        Xuan Qi <xuan.qi@...cle.com>,
        Trond Myklebust <trond.myklebust@...marydata.com>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.9 066/108] nfs: Fix "Dont increment lock sequence ID after NFS4ERR_MOVED"

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

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

From: Chuck Lever <chuck.lever@...cle.com>


[ Upstream commit 406dab8450ec76eca88a1af2fc15d18a2b36ca49 ]

Lock sequence IDs are bumped in decode_lock by calling
nfs_increment_seqid(). nfs_increment_sequid() does not use the
seqid_mutating_err() function fixed in commit 059aa7348241 ("Don't
increment lock sequence ID after NFS4ERR_MOVED").

Fixes: 059aa7348241 ("Don't increment lock sequence ID after ...")
Signed-off-by: Chuck Lever <chuck.lever@...cle.com>
Tested-by: Xuan Qi <xuan.qi@...cle.com>
Cc: stable@...r.kernel.org # v3.7+
Signed-off-by: Trond Myklebust <trond.myklebust@...marydata.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/nfs/nfs4state.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1079,6 +1079,7 @@ static void nfs_increment_seqid(int stat
 		case -NFS4ERR_BADXDR:
 		case -NFS4ERR_RESOURCE:
 		case -NFS4ERR_NOFILEHANDLE:
+		case -NFS4ERR_MOVED:
 			/* Non-seqid mutating errors */
 			return;
 	};