NFSv4: Fix the nfsv4 readlink reply buffer alignment

Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/nfs4xdr.c

@@ -1201,21 +1201,11 @@ static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg
 
 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
 {
-	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
-	unsigned int replen;
 	__be32 *p;
 
 	RESERVE_SPACE(4);
 	WRITE32(OP_READLINK);
 
-	/* set up reply kvec
-	 *    toplevel_status + taglen + rescount + OP_PUTFH + status
-	 *      + OP_READLINK + status + string length = 8
-	 */
-	replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
-	xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
-			readlink->pgbase, readlink->pglen);
-	
 	return 0;
 }
 
@@ -1781,6 +1771,8 @@ static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct n
 	struct compound_hdr hdr = {
 		.nops = 2,
 	};
+	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
+	unsigned int replen;
 	int status;
 
 	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
@@ -1789,6 +1781,15 @@ static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct n
 	if(status)
 		goto out;
 	status = encode_readlink(&xdr, args, req);
+
+	/* set up reply kvec
+	 *    toplevel_status + taglen + rescount + OP_PUTFH + status
+	 *      + OP_READLINK + status + string length = 8
+	 */
+	replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
+	xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
+			args->pgbase, args->pglen);
+
 out:
 	return status;
 }