rpc protocol

Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Raghavendra G <raghavendra@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 875 (Implement a new protocol to provide proper backward/forward compatibility)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=875

1 files changed, 48 insertions, 0 deletions

diff --git a/xlators/protocol/rpc/rpc-lib/src/xdr-common.h b/xlators/protocol/rpc/rpc-lib/src/xdr-common.h
new file mode 100644
index 000000000..50a57ade9
--- /dev/null
+++ b/xlators/protocol/rpc/rpc-lib/src/xdr-common.h
@@ -0,0 +1,48 @@
+/*
+  Copyright (c) 2010 Gluster, Inc. <http://www.gluster.com>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _XDR_COMMON_H_
+#define _XDR_COMMON_H_
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include <rpc/rpc.h>
+#define XDR_BYTES_PER_UNIT      4
+
+/* Returns the address of the byte that follows the
+ * last byte used for decoding the previous xdr component.
+ * For eg, once the RPC call for NFS has been decoded, thie macro will return
+ * the address from which the NFS header starts.
+ */
+#define xdr_decoded_remaining_addr(xdr)        ((&xdr)->x_private)
+
+/* Returns the length of the remaining record after the previous decode
+ * operation completed.
+ */
+#define xdr_decoded_remaining_len(xdr)         ((&xdr)->x_handy)
+
+/* Returns the number of bytes used by the last encode operation. */
+#define xdr_encoded_length(xdr) (((size_t)(&xdr)->x_private) - ((size_t)(&xdr)->x_base))
+
+#define xdr_decoded_length(xdr) (((size_t)(&xdr)->x_private) - ((size_t)(&xdr)->x_base))
+
+#endif