3.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Alex Elder <[email protected]> A number of assertions in the ceph messenger are implemented with BUG_ON(), killing the system if connection's state doesn't match what's expected. At this point our state model is (evidently) not well understood enough for these assertions to trigger a BUG(). Convert all BUG_ON(con->state...) calls to be WARN_ON(con->state...) so we learn about these issues without killing the machine. We now recognize that a connection fault can occur due to a socket closure at any time, regardless of the state of the connection. So there is really nothing we can assert about the state of the connection at that point so eliminate that assertion. Reported-by: Ugis <[email protected]> Tested-by: Ugis <[email protected]> Signed-off-by: Alex Elder <[email protected]> Reviewed-by: Sage Weil <[email protected]> (cherry picked from commit 122070a2ffc91f87fe8e8493eb0ac61986c5557c) Signed-off-by: Greg Kroah-Hartman <[email protected]> --- net/ceph/messenger.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -561,7 +561,7 @@ void ceph_con_open(struct ceph_connectio mutex_lock(&con->mutex); dout("con_open %p %s\n", con, ceph_pr_addr(&addr->in_addr)); - BUG_ON(con->state != CON_STATE_CLOSED); + WARN_ON(con->state != CON_STATE_CLOSED); con->state = CON_STATE_PREOPEN; con->peer_name.type = (__u8) entity_type; @@ -1505,7 +1505,7 @@ static int process_banner(struct ceph_co static void fail_protocol(struct ceph_connection *con) { reset_connection(con); - BUG_ON(con->state != CON_STATE_NEGOTIATING); + WARN_ON(con->state != CON_STATE_NEGOTIATING); con->state = CON_STATE_CLOSED; } @@ -1631,7 +1631,7 @@ static int process_connect(struct ceph_c return -1; } - BUG_ON(con->state != CON_STATE_NEGOTIATING); + WARN_ON(con->state != CON_STATE_NEGOTIATING); con->state = CON_STATE_OPEN; con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq); @@ -2128,7 +2128,6 @@ more: if (ret < 0) goto out; - BUG_ON(con->state != CON_STATE_CONNECTING); con->state = CON_STATE_NEGOTIATING; /* @@ -2156,7 +2155,7 @@ more: goto more; } - BUG_ON(con->state != CON_STATE_OPEN); + WARN_ON(con->state != CON_STATE_OPEN); if (con->in_base_pos < 0) { /* @@ -2370,7 +2369,7 @@ static void ceph_fault(struct ceph_conne dout("fault %p state %lu to peer %s\n", con, con->state, ceph_pr_addr(&con->peer_addr.in_addr)); - BUG_ON(con->state != CON_STATE_CONNECTING && + WARN_ON(con->state != CON_STATE_CONNECTING && con->state != CON_STATE_NEGOTIATING && con->state != CON_STATE_OPEN); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
