ceph: drop src address(es) from message header [new protocol feature]
The CEPH_FEATURE_NOSRCADDR protocol feature avoids putting the full source
address in each message header (twice). This patch switches the client to
the new scheme, and _requires_ this feature on the server. The server
will support both the old and new schemes. That means an old client will
work with a new server, but a new client will not work with an old server.
Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/fs/ceph/msgr.h b/fs/ceph/msgr.h
index 8aaab41..6baa8e4f 100644
--- a/fs/ceph/msgr.h
+++ b/fs/ceph/msgr.h
@@ -120,7 +120,7 @@
/*
* message header
*/
-struct ceph_msg_header {
+struct ceph_msg_header_old {
__le64 seq; /* message seq# for this session */
__le64 tid; /* transaction id */
__le16 type; /* message type */
@@ -138,6 +138,24 @@
__le32 crc; /* header crc32c */
} __attribute__ ((packed));
+struct ceph_msg_header {
+ __le64 seq; /* message seq# for this session */
+ __le64 tid; /* transaction id */
+ __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 */
+ __le32 data_len; /* bytes of data payload */
+ __le16 data_off; /* sender: include full offset;
+ receiver: mask against ~PAGE_MASK */
+
+ struct ceph_entity_name src;
+ __le32 reserved;
+ __le32 crc; /* header crc32c */
+} __attribute__ ((packed));
+
#define CEPH_MSG_PRIO_LOW 64
#define CEPH_MSG_PRIO_DEFAULT 127
#define CEPH_MSG_PRIO_HIGH 196