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libceph: set CLOSED state bit in con_init

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Once a connection is fully initialized, it is really in a CLOSED
state, so make that explicit by setting the bit in its state field.

It is possible for a connection in NEGOTIATING state to get a
failure, leading to ceph_fault() and ultimately ceph_con_close().
Clear that bits if it is set in that case, to reflect that the
connection truly is closed and is no longer participating in a
connect sequence.

Issue a warning if ceph_con_open() is called on a connection that
is not in CLOSED state.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
This commit is contained in:
Alex Elder 2012-05-29 11:04:58 -05:00 committed by Alex Elder
parent e10006f807
commit a5988c490e
1 changed files with 11 additions and 4 deletions
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15
net/ceph/messenger.c
View file

@ -454,11 +454,14 @@ void ceph_con_close(struct ceph_connection *con)
{
dout("con_close %p peer %s\n", con,
ceph_pr_addr(&con->peer_addr.in_addr));
set_bit(CLOSED, &con->state); /* in case there's queued work */
clear_bit(NEGOTIATING, &con->state);
clear_bit(STANDBY, &con->state); /* avoid connect_seq bump */
set_bit(CLOSED, &con->state);
clear_bit(LOSSYTX, &con->flags); /* so we retry next connect */
clear_bit(KEEPALIVE_PENDING, &con->flags);
clear_bit(WRITE_PENDING, &con->flags);
mutex_lock(&con->mutex);
reset_connection(con);
con->peer_global_seq = 0;
@ -475,7 +478,8 @@ void ceph_con_open(struct ceph_connection *con, struct ceph_entity_addr *addr)
{
dout("con_open %p %s\n", con, ceph_pr_addr(&addr->in_addr));
set_bit(OPENING, &con->state);
clear_bit(CLOSED, &con->state);
WARN_ON(!test_and_clear_bit(CLOSED, &con->state));
memcpy(&con->peer_addr, addr, sizeof(*addr));
con->delay = 0; /* reset backoff memory */
queue_con(con);
@ -530,6 +534,8 @@ void ceph_con_init(struct ceph_messenger *msgr, struct ceph_connection *con)
INIT_LIST_HEAD(&con->out_queue);
INIT_LIST_HEAD(&con->out_sent);
INIT_DELAYED_WORK(&con->work, con_work);
set_bit(CLOSED, &con->state);
}
EXPORT_SYMBOL(ceph_con_init);
@ -1933,14 +1939,15 @@ static int try_write(struct ceph_connection *con)
/* open the socket first? */
if (con->sock == NULL) {
clear_bit(NEGOTIATING, &con->state);
set_bit(CONNECTING, &con->state);
con_out_kvec_reset(con);
prepare_write_banner(con);
ret = prepare_write_connect(con);
if (ret < 0)
goto out;
prepare_read_banner(con);
set_bit(CONNECTING, &con->state);
clear_bit(NEGOTIATING, &con->state);
BUG_ON(con->in_msg);
con->in_tag = CEPH_MSGR_TAG_READY;