nfs41: use nfs4_server_caps_arg

In preparation for nfs41 sequence processing.
Signed-off-by: Andy Admason <andros@netapp.com>
[define nfs4_server_caps_arg]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/nfs4proc.c

@@ -1584,10 +1584,13 @@ void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
 
 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
 {
+	struct nfs4_server_caps_arg args = {
+		.fhandle = fhandle,
+	};
 	struct nfs4_server_caps_res res = {};
 	struct rpc_message msg = {
 		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
-		.rpc_argp = fhandle,
+		.rpc_argp = &args,
 		.rpc_resp = &res,
 	};
 	int status;

fs/nfs/nfs4xdr.c

@@ -1900,7 +1900,8 @@ static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs
 /*
  * GETATTR_BITMAP request
  */
-static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
+static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
+				    struct nfs4_server_caps_arg *args)
 {
 	struct xdr_stream xdr;
 	struct compound_hdr hdr = {
@@ -1909,7 +1910,7 @@ static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struc
 
 	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
 	encode_compound_hdr(&xdr, &hdr);
-	encode_putfh(&xdr, fhandle, &hdr);
+	encode_putfh(&xdr, args->fhandle, &hdr);
 	encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
 			   FATTR4_WORD0_LINK_SUPPORT|
 			   FATTR4_WORD0_SYMLINK_SUPPORT|

include/linux/nfs_xdr.h

@@ -791,6 +791,11 @@ struct nfs4_statfs_arg {
 	struct nfs4_sequence_args	seq_args;
 };
 
+struct nfs4_server_caps_arg {
+	struct nfs_fh		       *fhandle;
+	struct nfs4_sequence_args	seq_args;
+};
+
 struct nfs4_server_caps_res {
 	u32				attr_bitmask[2];
 	u32				acl_bitmask;