NFSv4: use the (more efficient) NFSv2/v3-like XDR scheme for generating

GETATTR RPC calls.

fs/nfs/nfs4proc.c

@@ -876,18 +876,25 @@ nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
 	return nfs4_proc_fsinfo(server, fhandle, info);
 }
 
-static int
-nfs4_proc_getattr(struct inode *inode, struct nfs_fattr *fattr)
+static int nfs4_proc_getattr(struct inode *inode, struct nfs_fattr *fattr)
 {
-	struct nfs4_compound compound;
-	struct nfs4_op ops[2];
-
+	struct nfs4_getattr_arg args = {
+		.fh = NFS_FH(inode),
+		.bitmask = nfs4_fattr_bitmap,
+	};
+	struct nfs4_getattr_res res = {
+		.fattr = fattr,
+		.server = NFS_SERVER(inode),
+	};
+	struct rpc_message msg = {
+		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
+		.rpc_argp = &args,
+		.rpc_resp = &res,
+	};
+	
 	fattr->valid = 0;
 
-	nfs4_setup_compound(&compound, ops, NFS_SERVER(inode), "getattr");
-	nfs4_setup_putfh(&compound, NFS_FH(inode));
-	nfs4_setup_getattr(&compound, fattr);
-	return nfs4_map_errors(nfs4_call_compound(&compound, NULL, 0));
+	return nfs4_map_errors(rpc_call_sync(NFS_CLIENT(inode), &msg, 0));
 }
 
 /* 

include/linux/nfs4.h

@@ -304,6 +304,7 @@ enum {
 	NFSPROC4_CLNT_LOCKT,
 	NFSPROC4_CLNT_LOCKU,
 	NFSPROC4_CLNT_ACCESS,
+	NFSPROC4_CLNT_GETATTR,
 };
 
 #endif

include/linux/nfs_xdr.h

@@ -3,6 +3,11 @@
 
 #include <linux/sunrpc/xprt.h>
 
+struct nfs4_fsid {
+	__u64 major;
+	__u64 minor;
+};
+
 struct nfs_fattr {
 	unsigned short		valid;		/* which fields are valid */
 	__u64			pre_size;	/* pre_op_attr.size	  */
@@ -26,10 +31,7 @@ struct nfs_fattr {
 	dev_t			rdev;
 	union {
 		__u64		nfs3;		/* also nfs2 */
-		struct {
-			__u64	major;
-			__u64	minor;
-		} nfs4;
+		struct nfs4_fsid nfs4;
 	} fsid_u;
 	__u64			fileid;
 	struct timespec		atime;
@@ -528,6 +530,16 @@ struct nfs4_getattr {
 	struct nfs_pathconf *		gt_pathconf;       /* response */
 };
 
+struct nfs4_getattr_arg {
+	const struct nfs_fh *		fh;
+	const u32 *			bitmask;
+};
+
+struct nfs4_getattr_res {
+	const struct nfs_server *	server;
+	struct nfs_fattr *		fattr;
+};
+
 struct nfs4_getfh {
 	struct nfs_fh *			gf_fhandle;       /* response */
 };