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Commit c86a2930 authored by Sage Weil's avatar Sage Weil
Browse files

ceph: carry explicit msg reference for currently sending message 



Carry a ceph_msg reference for connection->out_msg.  This will allow us to
make out_sent optional.

Signed-off-by: default avatarSage Weil <sage@newdream.net>
parent d4a780ce

fs/ceph/messenger.c

+18 −4
Original line number Diff line number Diff line
@@ -322,7 +322,10 @@ static void reset_connection(struct ceph_connection *con) 


	con->connect_seq = 0;

	con->out_seq = 0;

	if (con->out_msg) {

		ceph_msg_put(con->out_msg);

		con->out_msg = NULL;

	}

	con->in_seq = 0;

	mutex_unlock(&con->out_mutex);

}
@@ -423,7 +426,7 @@ static void prepare_write_message_footer(struct ceph_connection *con, int v) 
	con->out_kvec_bytes += sizeof(m->footer);

	con->out_kvec_left++;

	con->out_more = m->more_to_follow;

	con->out_msg = NULL;   /* we're done with this one */

	con->out_msg_done = true;

}



/*
@@ -436,6 +439,7 @@ static void prepare_write_message(struct ceph_connection *con) 


	con->out_kvec_bytes = 0;

	con->out_kvec_is_msg = true;

	con->out_msg_done = false;



	/* Sneak an ack in there first?  If we can get it into the same

	 * TCP packet that's a good thing. */
@@ -452,8 +456,9 @@ static void prepare_write_message(struct ceph_connection *con) 
	/* move message to sending/sent list */

	m = list_first_entry(&con->out_queue,

		       struct ceph_msg, list_head);

	con->out_msg = m;

	ceph_msg_get(m);

	list_move_tail(&m->list_head, &con->out_sent);

	con->out_msg = m;   /* we don't bother taking a reference here. */



	m->hdr.seq = cpu_to_le64(++con->out_seq);
@@ -1521,6 +1526,12 @@ static int try_write(struct ceph_connection *con) 


	/* msg pages? */

	if (con->out_msg) {

		if (con->out_msg_done) {

			ceph_msg_put(con->out_msg);

			con->out_msg = NULL;   /* we're done with this one */

			goto do_next;

		}



		ret = write_partial_msg_pages(con);

		if (ret == 1)

			goto more_kvec;  /* we need to send the footer, too! */
@@ -1533,6 +1544,7 @@ static int try_write(struct ceph_connection *con) 
		}

	}



do_next:

	if (!test_bit(CONNECTING, &con->state)) {

		/* is anything else pending? */

		if (!list_empty(&con->out_queue)) {
@@ -1923,8 +1935,10 @@ void ceph_con_revoke(struct ceph_connection *con, struct ceph_msg *msg) 
		list_del_init(&msg->list_head);

		ceph_msg_put(msg);

		msg->hdr.seq = 0;

		if (con->out_msg == msg)

		if (con->out_msg == msg) {

			ceph_msg_put(con->out_msg);

			con->out_msg = NULL;

		}

		if (con->out_kvec_is_msg) {

			con->out_skip = con->out_kvec_bytes;

			con->out_kvec_is_msg = false;

fs/ceph/messenger.h

+1 −0
Original line number Diff line number Diff line
@@ -182,6 +182,7 @@ struct ceph_connection { 
	/* message out temps */

	struct ceph_msg *out_msg;        /* sending message (== tail of

					    out_sent) */

	bool out_msg_done;

	struct ceph_msg_pos out_msg_pos;



	struct kvec out_kvec[8],         /* sending header/footer data */