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fs: dlm: handle non blocked connect event 

The manpage of connect shows that in non blocked mode a writeability
indicates successful connection event. This patch is handling this event
inside the writeability callback. In case of SCTP we use blocking
connect functionality which indicates a successful connect when the
function returns with a successful return value.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
Alexander Aring 2020-11-02 20:04:20 -05:00 committed by David Teigland
parent 53a5edaa05
commit 19633c7e20
1 changed files with 12 additions and 1 deletions
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13
fs/dlm/lowcomms.c
View File

@ -78,6 +78,7 @@ struct connection {
#define CF_APP_LIMITED 7
#define CF_CLOSING 8
#define CF_SHUTDOWN 9
#define CF_CONNECTED 10
struct list_head writequeue; /* List of outgoing writequeue_entries */
spinlock_t writequeue_lock;
int (*rx_action) (struct connection *); /* What to do when active */
@ -419,6 +420,12 @@ static void lowcomms_write_space(struct sock *sk)
if (!con)
goto out;
if (!test_and_set_bit(CF_CONNECTED, &con->flags)) {
log_print("successful connected to node %d", con->nodeid);
queue_work(send_workqueue, &con->swork);
goto out;
}
clear_bit(SOCK_NOSPACE, &con->sock->flags);
if (test_and_clear_bit(CF_APP_LIMITED, &con->flags)) {
@ -604,6 +611,7 @@ static void close_connection(struct connection *con, bool and_other,
con->rx_leftover = 0;
con->retries = 0;
clear_bit(CF_CONNECTED, &con->flags);
mutex_unlock(&con->sock_mutex);
clear_bit(CF_CLOSING, &con->flags);
}
@ -1027,8 +1035,11 @@ static void sctp_connect_to_sock(struct connection *con)
if (result == -EINPROGRESS)
result = 0;
if (result == 0)
if (result == 0) {
if (!test_and_set_bit(CF_CONNECTED, &con->flags))
log_print("successful connected to node %d", con->nodeid);
goto out;
}
bind_err:
con->sock = NULL;