ceph: negotiate authentication protocol; implement AUTH_NONE protocol

When we open a monitor session, we send an initial AUTH message listing
the auth protocols we support, our entity name, and (possibly) a previously
assigned global_id.  The monitor chooses a protocol and responds with an
initial message.

Initially implement AUTH_NONE, a dummy protocol that provides no security,
but works within the new framework.  It generates 'authorizers' that are
used when connecting to (mds, osd) services that simply state our entity
name and global_id.

This is a wire protocol change.

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

1 files changed, 15 insertions, 6 deletions

diff --git a/fs/ceph/msgr.h b/fs/ceph/msgr.h
index 8e3ea2eb1bf5..c758e8f8f71b 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 v023"
+#define CEPH_BANNER "ceph v024"
 #define CEPH_BANNER_MAX_LEN 30
 
 
@@ -46,11 +46,16 @@ struct ceph_entity_name {
 	__le64 num;
 } __attribute__ ((packed));
 
-#define CEPH_ENTITY_TYPE_MON    1
-#define CEPH_ENTITY_TYPE_MDS    2
-#define CEPH_ENTITY_TYPE_OSD    3
-#define CEPH_ENTITY_TYPE_CLIENT 4
-#define CEPH_ENTITY_TYPE_ADMIN  5
+#define CEPH_ENTITY_TYPE_MON    0x01
+#define CEPH_ENTITY_TYPE_MDS    0x02
+#define CEPH_ENTITY_TYPE_OSD    0x04
+#define CEPH_ENTITY_TYPE_CLIENT 0x08
+#define CEPH_ENTITY_TYPE_ADMIN  0x10
+#define CEPH_ENTITY_TYPE_AUTH   0x20
+
+#define CEPH_ENTITY_TYPE_ANY    0xFF
+
+extern const char *ceph_entity_type_name(int type);
 
 /*
  * entity_addr -- network address
@@ -94,6 +99,7 @@ struct ceph_entity_inst {
 #define CEPH_MSGR_TAG_ACK           8  /* message ack */
 #define CEPH_MSGR_TAG_KEEPALIVE     9  /* just a keepalive byte! */
 #define CEPH_MSGR_TAG_BADPROTOVER  10  /* bad protocol version */
+#define CEPH_MSGR_TAG_BADAUTHORIZER 11 /* bad authorizer */
 
 
 /*
@@ -104,6 +110,8 @@ struct ceph_msg_connect {
 	__le32 global_seq;   /* count connections initiated by this host */
 	__le32 connect_seq;  /* count connections initiated in this session */
 	__le32 protocol_version;
+	__le32 authorizer_protocol;
+	__le32 authorizer_len;
 	__u8  flags;         /* CEPH_MSG_CONNECT_* */
 } __attribute__ ((packed));
 
@@ -112,6 +120,7 @@ struct ceph_msg_connect_reply {
 	__le32 global_seq;
 	__le32 connect_seq;
 	__le32 protocol_version;
+	__le32 authorizer_len;
 	__u8 flags;
 } __attribute__ ((packed));