diff options
Diffstat (limited to 'net/rds/threads.c')
-rw-r--r-- | net/rds/threads.c | 105 |
1 files changed, 63 insertions, 42 deletions
diff --git a/net/rds/threads.c b/net/rds/threads.c index 4a32304..e42df11b 100644 --- a/net/rds/threads.c +++ b/net/rds/threads.c @@ -71,30 +71,30 @@ struct workqueue_struct *rds_wq; EXPORT_SYMBOL_GPL(rds_wq); -void rds_connect_path_complete(struct rds_connection *conn, int curr) +void rds_connect_path_complete(struct rds_conn_path *cp, int curr) { - if (!rds_conn_transition(conn, curr, RDS_CONN_UP)) { + if (!rds_conn_path_transition(cp, curr, RDS_CONN_UP)) { printk(KERN_WARNING "%s: Cannot transition to state UP, " "current state is %d\n", __func__, - atomic_read(&conn->c_state)); - rds_conn_drop(conn); + atomic_read(&cp->cp_state)); + rds_conn_path_drop(cp); return; } rdsdebug("conn %p for %pI4 to %pI4 complete\n", - conn, &conn->c_laddr, &conn->c_faddr); + cp->cp_conn, &cp->cp_conn->c_laddr, &cp->cp_conn->c_faddr); - conn->c_reconnect_jiffies = 0; - set_bit(0, &conn->c_map_queued); - queue_delayed_work(rds_wq, &conn->c_send_w, 0); - queue_delayed_work(rds_wq, &conn->c_recv_w, 0); + cp->cp_reconnect_jiffies = 0; + set_bit(0, &cp->cp_conn->c_map_queued); + queue_delayed_work(rds_wq, &cp->cp_send_w, 0); + queue_delayed_work(rds_wq, &cp->cp_recv_w, 0); } EXPORT_SYMBOL_GPL(rds_connect_path_complete); void rds_connect_complete(struct rds_connection *conn) { - rds_connect_path_complete(conn, RDS_CONN_CONNECTING); + rds_connect_path_complete(&conn->c_path[0], RDS_CONN_CONNECTING); } EXPORT_SYMBOL_GPL(rds_connect_complete); @@ -116,70 +116,87 @@ EXPORT_SYMBOL_GPL(rds_connect_complete); * We should *always* start with a random backoff; otherwise a broken connection * will always take several iterations to be re-established. */ -void rds_queue_reconnect(struct rds_connection *conn) +void rds_queue_reconnect(struct rds_conn_path *cp) { unsigned long rand; + struct rds_connection *conn = cp->cp_conn; rdsdebug("conn %p for %pI4 to %pI4 reconnect jiffies %lu\n", conn, &conn->c_laddr, &conn->c_faddr, - conn->c_reconnect_jiffies); + cp->cp_reconnect_jiffies); - set_bit(RDS_RECONNECT_PENDING, &conn->c_flags); - if (conn->c_reconnect_jiffies == 0) { - conn->c_reconnect_jiffies = rds_sysctl_reconnect_min_jiffies; - queue_delayed_work(rds_wq, &conn->c_conn_w, 0); + /* let peer with smaller addr initiate reconnect, to avoid duels */ + if (conn->c_trans->t_type == RDS_TRANS_TCP && + conn->c_laddr > conn->c_faddr) + return; + + set_bit(RDS_RECONNECT_PENDING, &cp->cp_flags); + if (cp->cp_reconnect_jiffies == 0) { + cp->cp_reconnect_jiffies = rds_sysctl_reconnect_min_jiffies; + queue_delayed_work(rds_wq, &cp->cp_conn_w, 0); return; } get_random_bytes(&rand, sizeof(rand)); rdsdebug("%lu delay %lu ceil conn %p for %pI4 -> %pI4\n", - rand % conn->c_reconnect_jiffies, conn->c_reconnect_jiffies, + rand % cp->cp_reconnect_jiffies, cp->cp_reconnect_jiffies, conn, &conn->c_laddr, &conn->c_faddr); - queue_delayed_work(rds_wq, &conn->c_conn_w, - rand % conn->c_reconnect_jiffies); + queue_delayed_work(rds_wq, &cp->cp_conn_w, + rand % cp->cp_reconnect_jiffies); - conn->c_reconnect_jiffies = min(conn->c_reconnect_jiffies * 2, + cp->cp_reconnect_jiffies = min(cp->cp_reconnect_jiffies * 2, rds_sysctl_reconnect_max_jiffies); } void rds_connect_worker(struct work_struct *work) { - struct rds_connection *conn = container_of(work, struct rds_connection, c_conn_w.work); + struct rds_conn_path *cp = container_of(work, + struct rds_conn_path, + cp_conn_w.work); + struct rds_connection *conn = cp->cp_conn; int ret; - clear_bit(RDS_RECONNECT_PENDING, &conn->c_flags); - if (rds_conn_transition(conn, RDS_CONN_DOWN, RDS_CONN_CONNECTING)) { - ret = conn->c_trans->conn_connect(conn); + if (cp->cp_index > 1 && cp->cp_conn->c_laddr > cp->cp_conn->c_faddr) + return; + clear_bit(RDS_RECONNECT_PENDING, &cp->cp_flags); + ret = rds_conn_path_transition(cp, RDS_CONN_DOWN, RDS_CONN_CONNECTING); + if (ret) { + ret = conn->c_trans->conn_path_connect(cp); rdsdebug("conn %p for %pI4 to %pI4 dispatched, ret %d\n", conn, &conn->c_laddr, &conn->c_faddr, ret); if (ret) { - if (rds_conn_transition(conn, RDS_CONN_CONNECTING, RDS_CONN_DOWN)) - rds_queue_reconnect(conn); + if (rds_conn_path_transition(cp, + RDS_CONN_CONNECTING, + RDS_CONN_DOWN)) + rds_queue_reconnect(cp); else - rds_conn_error(conn, "RDS: connect failed\n"); + rds_conn_path_error(cp, + "RDS: connect failed\n"); } } } void rds_send_worker(struct work_struct *work) { - struct rds_connection *conn = container_of(work, struct rds_connection, c_send_w.work); + struct rds_conn_path *cp = container_of(work, + struct rds_conn_path, + cp_send_w.work); int ret; - if (rds_conn_state(conn) == RDS_CONN_UP) { - clear_bit(RDS_LL_SEND_FULL, &conn->c_flags); - ret = rds_send_xmit(conn); + if (rds_conn_path_state(cp) == RDS_CONN_UP) { + clear_bit(RDS_LL_SEND_FULL, &cp->cp_flags); + ret = rds_send_xmit(cp); cond_resched(); - rdsdebug("conn %p ret %d\n", conn, ret); + rdsdebug("conn %p ret %d\n", cp->cp_conn, ret); switch (ret) { case -EAGAIN: rds_stats_inc(s_send_immediate_retry); - queue_delayed_work(rds_wq, &conn->c_send_w, 0); + queue_delayed_work(rds_wq, &cp->cp_send_w, 0); break; case -ENOMEM: rds_stats_inc(s_send_delayed_retry); - queue_delayed_work(rds_wq, &conn->c_send_w, 2); + queue_delayed_work(rds_wq, &cp->cp_send_w, 2); default: break; } @@ -188,20 +205,22 @@ void rds_send_worker(struct work_struct *work) void rds_recv_worker(struct work_struct *work) { - struct rds_connection *conn = container_of(work, struct rds_connection, c_recv_w.work); + struct rds_conn_path *cp = container_of(work, + struct rds_conn_path, + cp_recv_w.work); int ret; - if (rds_conn_state(conn) == RDS_CONN_UP) { - ret = conn->c_trans->recv(conn); - rdsdebug("conn %p ret %d\n", conn, ret); + if (rds_conn_path_state(cp) == RDS_CONN_UP) { + ret = cp->cp_conn->c_trans->recv_path(cp); + rdsdebug("conn %p ret %d\n", cp->cp_conn, ret); switch (ret) { case -EAGAIN: rds_stats_inc(s_recv_immediate_retry); - queue_delayed_work(rds_wq, &conn->c_recv_w, 0); + queue_delayed_work(rds_wq, &cp->cp_recv_w, 0); break; case -ENOMEM: rds_stats_inc(s_recv_delayed_retry); - queue_delayed_work(rds_wq, &conn->c_recv_w, 2); + queue_delayed_work(rds_wq, &cp->cp_recv_w, 2); default: break; } @@ -210,9 +229,11 @@ void rds_recv_worker(struct work_struct *work) void rds_shutdown_worker(struct work_struct *work) { - struct rds_connection *conn = container_of(work, struct rds_connection, c_down_w); + struct rds_conn_path *cp = container_of(work, + struct rds_conn_path, + cp_down_w); - rds_conn_shutdown(conn); + rds_conn_shutdown(cp); } void rds_threads_exit(void) |