Hold the mutex while twiddling all of the state bits to avoid possible races. While we're here, make not of why we cannot close the socket directly.
Signed-off-by: Sage Weil <[email protected]> --- net/ceph/messenger.c | 8 +++++++- 1 files changed, 7 insertions(+), 1 deletions(-) diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 7105908..e24310e 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -503,6 +503,7 @@ static void reset_connection(struct ceph_connection *con) */ void ceph_con_close(struct ceph_connection *con) { + mutex_lock(&con->mutex); dout("con_close %p peer %s\n", con, ceph_pr_addr(&con->peer_addr.in_addr)); clear_bit(NEGOTIATING, &con->state); @@ -515,11 +516,16 @@ void ceph_con_close(struct ceph_connection *con) clear_bit(KEEPALIVE_PENDING, &con->flags); clear_bit(WRITE_PENDING, &con->flags); - mutex_lock(&con->mutex); reset_connection(con); con->peer_global_seq = 0; cancel_delayed_work(&con->work); mutex_unlock(&con->mutex); + + /* + * We cannot close the socket directly from here because the + * work threads use it without holding the mutex. Instead, let + * con_work() do it. + */ queue_con(con); } EXPORT_SYMBOL(ceph_con_close); -- 1.7.9 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
