RDS: Update rds_conn_shutdown to work with rds_conn_path
This commit changes rds_conn_shutdown to take a rds_conn_path *
argument, allowing it to shutdown paths other than c_path[0] for
MP-capable transports.
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/rds/connection.c b/net/rds/connection.c
index a99ac69..a88d26f 100644
--- a/net/rds/connection.c
+++ b/net/rds/connection.c
@@ -96,14 +96,16 @@
* and receiving over this connection again in the future. It is up to
* the transport to have serialized this call with its send and recv.
*/
-static void rds_conn_reset(struct rds_connection *conn)
+static void rds_conn_path_reset(struct rds_conn_path *cp)
{
+ struct rds_connection *conn = cp->cp_conn;
+
rdsdebug("connection %pI4 to %pI4 reset\n",
&conn->c_laddr, &conn->c_faddr);
rds_stats_inc(s_conn_reset);
- rds_send_reset(conn);
- conn->c_flags = 0;
+ rds_send_path_reset(cp);
+ cp->cp_flags = 0;
/* Do not clear next_rx_seq here, else we cannot distinguish
* retransmitted packets from new packets, and will hand all
@@ -294,10 +296,12 @@
}
EXPORT_SYMBOL_GPL(rds_conn_create_outgoing);
-void rds_conn_shutdown(struct rds_connection *conn)
+void rds_conn_shutdown(struct rds_conn_path *cp)
{
+ struct rds_connection *conn = cp->cp_conn;
+
/* shut it down unless it's down already */
- if (!rds_conn_transition(conn, RDS_CONN_DOWN, RDS_CONN_DOWN)) {
+ if (!rds_conn_path_transition(cp, RDS_CONN_DOWN, RDS_CONN_DOWN)) {
/*
* Quiesce the connection mgmt handlers before we start tearing
* things down. We don't hold the mutex for the entire
@@ -305,35 +309,41 @@
* deadlocking with the CM handler. Instead, the CM event
* handler is supposed to check for state DISCONNECTING
*/
- mutex_lock(&conn->c_cm_lock);
- if (!rds_conn_transition(conn, RDS_CONN_UP, RDS_CONN_DISCONNECTING)
- && !rds_conn_transition(conn, RDS_CONN_ERROR, RDS_CONN_DISCONNECTING)) {
- rds_conn_error(conn, "shutdown called in state %d\n",
- atomic_read(&conn->c_state));
- mutex_unlock(&conn->c_cm_lock);
+ mutex_lock(&cp->cp_cm_lock);
+ if (!rds_conn_path_transition(cp, RDS_CONN_UP,
+ RDS_CONN_DISCONNECTING) &&
+ !rds_conn_path_transition(cp, RDS_CONN_ERROR,
+ RDS_CONN_DISCONNECTING)) {
+ rds_conn_path_error(cp,
+ "shutdown called in state %d\n",
+ atomic_read(&cp->cp_state));
+ mutex_unlock(&cp->cp_cm_lock);
return;
}
- mutex_unlock(&conn->c_cm_lock);
+ mutex_unlock(&cp->cp_cm_lock);
- wait_event(conn->c_waitq,
- !test_bit(RDS_IN_XMIT, &conn->c_flags));
- wait_event(conn->c_waitq,
- !test_bit(RDS_RECV_REFILL, &conn->c_flags));
+ wait_event(cp->cp_waitq,
+ !test_bit(RDS_IN_XMIT, &cp->cp_flags));
+ wait_event(cp->cp_waitq,
+ !test_bit(RDS_RECV_REFILL, &cp->cp_flags));
- conn->c_trans->conn_shutdown(conn);
- rds_conn_reset(conn);
+ if (!conn->c_trans->t_mp_capable)
+ conn->c_trans->conn_shutdown(conn);
+ else
+ conn->c_trans->conn_path_shutdown(cp);
+ rds_conn_path_reset(cp);
- if (!rds_conn_transition(conn, RDS_CONN_DISCONNECTING, RDS_CONN_DOWN)) {
+ if (!rds_conn_path_transition(cp, RDS_CONN_DISCONNECTING,
+ RDS_CONN_DOWN)) {
/* This can happen - eg when we're in the middle of tearing
* down the connection, and someone unloads the rds module.
* Quite reproduceable with loopback connections.
* Mostly harmless.
*/
- rds_conn_error(conn,
- "%s: failed to transition to state DOWN, "
- "current state is %d\n",
- __func__,
- atomic_read(&conn->c_state));
+ rds_conn_path_error(cp, "%s: failed to transition "
+ "to state DOWN, current state "
+ "is %d\n", __func__,
+ atomic_read(&cp->cp_state));
return;
}
}
@@ -342,13 +352,13 @@
* The passive side of an IB loopback connection is never added
* to the conn hash, so we never trigger a reconnect on this
* conn - the reconnect is always triggered by the active peer. */
- cancel_delayed_work_sync(&conn->c_conn_w);
+ cancel_delayed_work_sync(&cp->cp_conn_w);
rcu_read_lock();
if (!hlist_unhashed(&conn->c_hash_node)) {
rcu_read_unlock();
if (conn->c_trans->t_type != RDS_TRANS_TCP ||
- conn->c_path[0].cp_outgoing == 1)
- rds_queue_reconnect(&conn->c_path[0]);
+ cp->cp_outgoing == 1)
+ rds_queue_reconnect(cp);
} else {
rcu_read_unlock();
}