diff options
| -rw-r--r-- | drivers/infiniband/core/cma.c | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 11d369b7faca..95beaebab4bb 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -2195,7 +2195,7 @@ static int cma_ib_req_handler(struct ib_cm_id *cm_id, } mutex_lock(&listen_id->handler_mutex); - if (listen_id->state != RDMA_CM_LISTEN) { + if (READ_ONCE(listen_id->state) != RDMA_CM_LISTEN) { ret = -ECONNABORTED; goto err_unlock; } @@ -2373,7 +2373,7 @@ static int iw_conn_req_handler(struct iw_cm_id *cm_id, listen_id = cm_id->context; mutex_lock(&listen_id->handler_mutex); - if (listen_id->state != RDMA_CM_LISTEN) + if (READ_ONCE(listen_id->state) != RDMA_CM_LISTEN) goto out; /* Create a new RDMA id for the new IW CM ID */ @@ -3327,7 +3327,8 @@ int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse) id_priv = container_of(id, struct rdma_id_private, id); spin_lock_irqsave(&id_priv->lock, flags); - if (reuse || id_priv->state == RDMA_CM_IDLE) { + if ((reuse && id_priv->state != RDMA_CM_LISTEN) || + id_priv->state == RDMA_CM_IDLE) { id_priv->reuseaddr = reuse; ret = 0; } else { @@ -3521,8 +3522,7 @@ static int cma_check_port(struct rdma_bind_list *bind_list, if (id_priv == cur_id) continue; - if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr && - cur_id->reuseaddr) + if (reuseaddr && cur_id->reuseaddr) continue; cur_addr = cma_src_addr(cur_id); @@ -3563,18 +3563,6 @@ static int cma_use_port(enum rdma_ucm_port_space ps, return ret; } -static int cma_bind_listen(struct rdma_id_private *id_priv) -{ - struct rdma_bind_list *bind_list = id_priv->bind_list; - int ret = 0; - - mutex_lock(&lock); - if (bind_list->owners.first->next) - ret = cma_check_port(bind_list, id_priv, 0); - mutex_unlock(&lock); - return ret; -} - static enum rdma_ucm_port_space cma_select_inet_ps(struct rdma_id_private *id_priv) { @@ -3683,8 +3671,16 @@ int rdma_listen(struct rdma_cm_id *id, int backlog) return -EINVAL; } + /* + * Once the ID reaches RDMA_CM_LISTEN it is not allowed to be reusable + * any more, and has to be unique in the bind list. + */ if (id_priv->reuseaddr) { - ret = cma_bind_listen(id_priv); + mutex_lock(&lock); + ret = cma_check_port(id_priv->bind_list, id_priv, 0); + if (!ret) + id_priv->reuseaddr = 0; + mutex_unlock(&lock); if (ret) goto err; } @@ -3709,6 +3705,10 @@ int rdma_listen(struct rdma_cm_id *id, int backlog) return 0; err: id_priv->backlog = 0; + /* + * All the failure paths that lead here will not allow the req_handler's + * to have run. + */ cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND); return ret; } |