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libceph: define and use an explicit CONNECTED state

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There is no state explicitly defined when a ceph connection is fully
operational.  So define one.

It's set when the connection sequence completes successfully, and is
cleared when the connection gets closed.

Be a little more careful when examining the old state when a socket
disconnect event is reported.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
This commit is contained in:
Alex Elder 2012-05-23 14:35:23 -05:00 committed by Sage Weil
parent 3ec50d1868
commit e27947c767
2 changed files with 8 additions and 2 deletions
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1
include/linux/ceph/messenger.h
View File

@ -120,6 +120,7 @@ struct ceph_msg_pos {
*/
#define CONNECTING 1
#define NEGOTIATING 2
#define CONNECTED 5
#define STANDBY 8 /* no outgoing messages, socket closed. we keep
* the ceph_connection around to maintain shared
* state with the peer. */

9
net/ceph/messenger.c
View File

@ -463,6 +463,7 @@ void ceph_con_close(struct ceph_connection *con)
ceph_pr_addr(&con->peer_addr.in_addr));
clear_bit(NEGOTIATING, &con->state);
clear_bit(CONNECTING, &con->state);
clear_bit(CONNECTED, &con->state);
clear_bit(STANDBY, &con->state); /* avoid connect_seq bump */
set_bit(CLOSED, &con->state);
@ -1564,6 +1565,7 @@ static int process_connect(struct ceph_connection *con)
}
clear_bit(NEGOTIATING, &con->state);
clear_bit(CONNECTING, &con->state);
set_bit(CONNECTED, &con->state);
con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq);
con->connect_seq++;
con->peer_features = server_feat;
@ -2114,6 +2116,7 @@ static int try_read(struct ceph_connection *con)
prepare_read_ack(con);
break;
case CEPH_MSGR_TAG_CLOSE:
clear_bit(CONNECTED, &con->state);
set_bit(CLOSED, &con->state); /* fixme */
goto out;
default:
@ -2190,11 +2193,13 @@ static void con_work(struct work_struct *work)
mutex_lock(&con->mutex);
restart:
if (test_and_clear_bit(SOCK_CLOSED, &con->flags)) {
if (test_and_clear_bit(CONNECTING, &con->state)) {
if (test_and_clear_bit(CONNECTED, &con->state))
con->error_msg = "socket closed";
else if (test_and_clear_bit(CONNECTING, &con->state)) {
clear_bit(NEGOTIATING, &con->state);
con->error_msg = "connection failed";
} else {
con->error_msg = "socket closed";
con->error_msg = "unrecognized con state";
}
goto fault;
}