[PATCH 3.16 147/212] NFSv4: Fix the underestimation of delegation XDR space reservation

[Ben Hutchings]

3.16.44-rc1 review patch.  If anyone has any objections, please let me know.

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

From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>

commit 5a1f6d9e9b803003271b40b67786ff46fa4eda01 upstream.

Account for the "space_limit" field in struct open_write_delegation4.

Fixes: 2cebf82883f4 ("NFSv4: Fix the underestimate of NFSv4 open request size")
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Reviewed-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Signed-off-by: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 fs/nfs/nfs4xdr.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -165,8 +165,10 @@ static int nfs4_stat_to_errno(int);
 				open_owner_id_maxsz + \
 				encode_opentype_maxsz + \
 				encode_claim_null_maxsz)
+#define decode_space_limit_maxsz	(3)
 #define decode_ace_maxsz	(3 + nfs4_owner_maxsz)
 #define decode_delegation_maxsz	(1 + decode_stateid_maxsz + 1 + \
+				decode_space_limit_maxsz + \
 				decode_ace_maxsz)
 #define decode_change_info_maxsz	(5)
 #define decode_open_maxsz	(op_decode_hdr_maxsz + \