ceph: define ceph_auth_handshake type

The definitions for the ceph_mds_session and ceph_osd both contain
five fields related only to "authorizers."  Encapsulate those fields
into their own struct type, allowing for better isolation in some
upcoming patches.

Fix the #includes in "linux/ceph/osd_client.h" to lay out their more
complete canonical path.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h
index 7c05ac2..cedfb1a 100644
--- a/include/linux/ceph/osd_client.h
+++ b/include/linux/ceph/osd_client.h
@@ -6,9 +6,10 @@
 #include <linux/mempool.h>
 #include <linux/rbtree.h>
 
-#include "types.h"
-#include "osdmap.h"
-#include "messenger.h"
+#include <linux/ceph/types.h>
+#include <linux/ceph/osdmap.h>
+#include <linux/ceph/messenger.h>
+#include <linux/ceph/auth.h>
 
 /* 
  * Maximum object name size 
@@ -40,9 +41,7 @@
 	struct list_head o_requests;
 	struct list_head o_linger_requests;
 	struct list_head o_osd_lru;
-	struct ceph_authorizer *o_authorizer;
-	void *o_authorizer_buf, *o_authorizer_reply_buf;
-	size_t o_authorizer_buf_len, o_authorizer_reply_buf_len;
+	struct ceph_auth_handshake o_auth;
 	unsigned long lru_ttl;
 	int o_marked_for_keepalive;
 	struct list_head o_keepalive_item;