linux-kernel - [PATCH 4.4 058/137] pNFS/flexfiles: Fix an XDR encoding bug in layoutreturn

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Message-Id: <20160224033419.120313325@linuxfoundation.org>
Date:	Tue, 23 Feb 2016 19:33:09 -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,
	Trond Myklebust <trond.myklebust@...marydata.com>
Subject: [PATCH 4.4 058/137] pNFS/flexfiles: Fix an XDR encoding bug in layoutreturn

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

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

From: Trond Myklebust <trond.myklebust@...marydata.com>

commit 082fa37d1351a41afc491d44a1d095cb8d919aa2 upstream.

We must not skip encoding the statistics, or the server will see an
XDR encoding error.

Signed-off-by: Trond Myklebust <trond.myklebust@...marydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/nfs/flexfilelayout/flexfilelayout.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -1859,11 +1859,9 @@ ff_layout_encode_layoutreturn(struct pnf
 	start = xdr_reserve_space(xdr, 4);
 	BUG_ON(!start);
 
-	if (ff_layout_encode_ioerr(flo, xdr, args))
-		goto out;
-
+	ff_layout_encode_ioerr(flo, xdr, args);
 	ff_layout_encode_iostats(flo, xdr, args);
-out:
+
 	*start = cpu_to_be32((xdr->p - start - 1) * 4);
 	dprintk("%s: Return\n", __func__);
 }