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Commit dbad185d authored by Sage Weil's avatar Sage Weil
Browse files

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: default avatarSage Weil <sage@newdream.net>
parent a5ee751c

fs/ceph/ceph_fs.h

+11 −2
Original line number Diff line number Diff line
@@ -53,8 +53,17 @@ 
/*

 * feature bits

 */

#define CEPH_FEATURE_SUPPORTED  0

#define CEPH_FEATURE_REQUIRED   0

#define CEPH_FEATURE_UID        1

#define CEPH_FEATURE_NOSRCADDR  2



#define CEPH_FEATURE_SUPPORTED_MON  CEPH_FEATURE_UID|CEPH_FEATURE_NOSRCADDR

#define CEPH_FEATURE_REQUIRED_MON   CEPH_FEATURE_UID

#define CEPH_FEATURE_SUPPORTED_MDS  CEPH_FEATURE_UID|CEPH_FEATURE_NOSRCADDR

#define CEPH_FEATURE_REQUIRED_MDS   CEPH_FEATURE_UID

#define CEPH_FEATURE_SUPPORTED_OSD  CEPH_FEATURE_UID|CEPH_FEATURE_NOSRCADDR

#define CEPH_FEATURE_REQUIRED_OSD   CEPH_FEATURE_UID

#define CEPH_FEATURE_SUPPORTED_CLIENT CEPH_FEATURE_NOSRCADDR

#define CEPH_FEATURE_REQUIRED_CLIENT CEPH_FEATURE_NOSRCADDR





/*

fs/ceph/messenger.c

+6 −8
Original line number Diff line number Diff line
@@ -663,7 +663,7 @@ static void prepare_write_connect(struct ceph_messenger *msgr, 
	dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con,

	     con->connect_seq, global_seq, proto);



	con->out_connect.features = CEPH_FEATURE_SUPPORTED;

	con->out_connect.features = CEPH_FEATURE_SUPPORTED_CLIENT;

	con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT);

	con->out_connect.connect_seq = cpu_to_le32(con->connect_seq);

	con->out_connect.global_seq = cpu_to_le32(global_seq);
@@ -1126,8 +1126,8 @@ static void fail_protocol(struct ceph_connection *con) 


static int process_connect(struct ceph_connection *con)

{

	u64 sup_feat = CEPH_FEATURE_SUPPORTED;

	u64 req_feat = CEPH_FEATURE_REQUIRED;

	u64 sup_feat = CEPH_FEATURE_SUPPORTED_CLIENT;

	u64 req_feat = CEPH_FEATURE_REQUIRED_CLIENT;

	u64 server_feat = le64_to_cpu(con->in_reply.features);



	dout("process_connect on %p tag %d\n", con, (int)con->in_tag);
@@ -1514,14 +1514,14 @@ static void process_message(struct ceph_connection *con) 


	/* if first message, set peer_name */

	if (con->peer_name.type == 0)

		con->peer_name = msg->hdr.src.name;

		con->peer_name = msg->hdr.src;



	con->in_seq++;

	mutex_unlock(&con->mutex);



	dout("===== %p %llu from %s%lld %d=%s len %d+%d (%u %u %u) =====\n",

	     msg, le64_to_cpu(msg->hdr.seq),

	     ENTITY_NAME(msg->hdr.src.name),

	     ENTITY_NAME(msg->hdr.src),

	     le16_to_cpu(msg->hdr.type),

	     ceph_msg_type_name(le16_to_cpu(msg->hdr.type)),

	     le32_to_cpu(msg->hdr.front_len),
@@ -1987,9 +1987,7 @@ void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) 
	}



	/* set src+dst */

	msg->hdr.src.name = con->msgr->inst.name;

	msg->hdr.src.addr = con->msgr->my_enc_addr;

	msg->hdr.orig_src = msg->hdr.src;

	msg->hdr.src = con->msgr->inst.name;



	BUG_ON(msg->front.iov_len != le32_to_cpu(msg->hdr.front_len));

fs/ceph/msgr.h

+19 −1
Original line number Diff line number Diff line
@@ -120,7 +120,7 @@ struct ceph_msg_connect_reply { 
/*

 * 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 @@ struct ceph_msg_header { 
	__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