From 0b3ca768fcb07338c99df5e3ccec99119435e321 Mon Sep 17 00:00:00 2001 From: Haggai Eran Date: Thu, 30 Jul 2015 17:50:24 +0300 Subject: [PATCH] IB/cma: Use found net_dev for passive connections When receiving a new connection in cma_req_handler, we actually already know the net_dev that is used for the connection's creation. Instead of calling cma_translate_addr to resolve the new connection id's source address, just use the net_dev that was found. Signed-off-by: Haggai Eran Signed-off-by: Doug Ledford --- drivers/infiniband/core/cma.c | 76 ++++++++++++++++++++++------------- 1 file changed, 49 insertions(+), 27 deletions(-) diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 951ff96c99e1..0a7475c921aa 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -1277,33 +1277,31 @@ static struct rdma_id_private *cma_find_listener( } static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id, - struct ib_cm_event *ib_event) + struct ib_cm_event *ib_event, + struct net_device **net_dev) { struct cma_req_info req; struct rdma_bind_list *bind_list; struct rdma_id_private *id_priv; - struct net_device *net_dev; int err; err = cma_save_req_info(ib_event, &req); if (err) return ERR_PTR(err); - net_dev = cma_get_net_dev(ib_event, &req); - if (IS_ERR(net_dev)) { - if (PTR_ERR(net_dev) == -EAFNOSUPPORT) { + *net_dev = cma_get_net_dev(ib_event, &req); + if (IS_ERR(*net_dev)) { + if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) { /* Assuming the protocol is AF_IB */ - net_dev = NULL; + *net_dev = NULL; } else { - return ERR_CAST(net_dev); + return ERR_CAST(*net_dev); } } bind_list = cma_ps_find(rdma_ps_from_service_id(req.service_id), cma_port_from_service_id(req.service_id)); - id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, net_dev); - - dev_put(net_dev); + id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev); return id_priv; } @@ -1553,7 +1551,8 @@ out: } static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, - struct ib_cm_event *ib_event) + struct ib_cm_event *ib_event, + struct net_device *net_dev) { struct rdma_id_private *id_priv; struct rdma_cm_id *id; @@ -1585,14 +1584,16 @@ static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, if (rt->num_paths == 2) rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path; - if (cma_any_addr(cma_src_addr(id_priv))) { - rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND; - rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid); - ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey)); - } else { - ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr); + if (net_dev) { + ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL); if (ret) goto err; + } else { + /* An AF_IB connection */ + WARN_ON_ONCE(ss_family != AF_IB); + + cma_translate_ib((struct sockaddr_ib *)cma_src_addr(id_priv), + &rt->addr.dev_addr); } rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid); @@ -1605,7 +1606,8 @@ err: } static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, - struct ib_cm_event *ib_event) + struct ib_cm_event *ib_event, + struct net_device *net_dev) { struct rdma_id_private *id_priv; struct rdma_cm_id *id; @@ -1624,10 +1626,18 @@ static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, ib_event->param.sidr_req_rcvd.service_id)) goto err; - if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { - ret = cma_translate_addr(cma_src_addr(id_priv), &id->route.addr.dev_addr); + if (net_dev) { + ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL); if (ret) goto err; + } else { + /* An AF_IB connection */ + WARN_ON_ONCE(ss_family != AF_IB); + + if (!cma_any_addr(cma_src_addr(id_priv))) + cma_translate_ib((struct sockaddr_ib *) + cma_src_addr(id_priv), + &id->route.addr.dev_addr); } id_priv->state = RDMA_CM_CONNECT; @@ -1665,28 +1675,33 @@ static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) { struct rdma_id_private *listen_id, *conn_id; struct rdma_cm_event event; + struct net_device *net_dev; int offset, ret; - listen_id = cma_id_from_event(cm_id, ib_event); + listen_id = cma_id_from_event(cm_id, ib_event, &net_dev); if (IS_ERR(listen_id)) return PTR_ERR(listen_id); - if (!cma_check_req_qp_type(&listen_id->id, ib_event)) - return -EINVAL; + if (!cma_check_req_qp_type(&listen_id->id, ib_event)) { + ret = -EINVAL; + goto net_dev_put; + } - if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) - return -ECONNABORTED; + if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) { + ret = -ECONNABORTED; + goto net_dev_put; + } memset(&event, 0, sizeof event); offset = cma_user_data_offset(listen_id); event.event = RDMA_CM_EVENT_CONNECT_REQUEST; if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) { - conn_id = cma_new_udp_id(&listen_id->id, ib_event); + conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev); event.param.ud.private_data = ib_event->private_data + offset; event.param.ud.private_data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset; } else { - conn_id = cma_new_conn_id(&listen_id->id, ib_event); + conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev); cma_set_req_event_data(&event, &ib_event->param.req_rcvd, ib_event->private_data, offset); } @@ -1724,6 +1739,8 @@ static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) mutex_unlock(&conn_id->handler_mutex); mutex_unlock(&listen_id->handler_mutex); cma_deref_id(conn_id); + if (net_dev) + dev_put(net_dev); return 0; err3: @@ -1737,6 +1754,11 @@ err1: mutex_unlock(&listen_id->handler_mutex); if (conn_id) rdma_destroy_id(&conn_id->id); + +net_dev_put: + if (net_dev) + dev_put(net_dev); + return ret; } -- 2.20.1