From: Sage Weil <sage@newdream.net>
Date: Tue, 13 Oct 2009 19:55:26 +0000 (-0700)
Subject: ceph: add version field to message header
X-Git-Tag: v2.6.34-rc2~9^2~168
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=535bbb530764b1b2b3b732837f0e61e1baae7109;p=karo-tx-linux.git

ceph: add version field to message header

This makes it easier for individual message types to indicate
their particular encoding, and make future changes backward
compatible.

Signed-off-by: Sage Weil <sage@newdream.net>
---

diff --git a/fs/ceph/msgr.h b/fs/ceph/msgr.h
index 73921ae43faa..9abc879e25b1 100644
--- a/fs/ceph/msgr.h
+++ b/fs/ceph/msgr.h
@@ -21,7 +21,7 @@
  * whenever the wire protocol changes.  try to keep this string length
  * constant.
  */
-#define CEPH_BANNER "ceph v021"
+#define CEPH_BANNER "ceph v022"
 #define CEPH_BANNER_MAX_LEN 30
 
 
@@ -125,6 +125,7 @@ struct ceph_msg_header {
 	__le64 seq;       /* message seq# for this session */
 	__le16 type;      /* message type */
 	__le16 priority;  /* priority.  higher value == higher priority */
+	__le16 version;   /* version of message encoding */
 
 	__le32 front_len; /* bytes in main payload */
 	__le32 middle_len;/* bytes in middle payload */