diff options
Diffstat (limited to 'drivers/nvme/target/rdma.c')
-rw-r--r-- | drivers/nvme/target/rdma.c | 211 |
1 files changed, 137 insertions, 74 deletions
diff --git a/drivers/nvme/target/rdma.c b/drivers/nvme/target/rdma.c index 9e1b8c61f54e..fd47de0e4e4e 100644 --- a/drivers/nvme/target/rdma.c +++ b/drivers/nvme/target/rdma.c @@ -78,6 +78,7 @@ enum nvmet_rdma_queue_state { struct nvmet_rdma_queue { struct rdma_cm_id *cm_id; + struct ib_qp *qp; struct nvmet_port *port; struct ib_cq *cq; atomic_t sq_wr_avail; @@ -105,6 +106,13 @@ struct nvmet_rdma_queue { struct list_head queue_list; }; +struct nvmet_rdma_port { + struct nvmet_port *nport; + struct sockaddr_storage addr; + struct rdma_cm_id *cm_id; + struct delayed_work repair_work; +}; + struct nvmet_rdma_device { struct ib_device *device; struct ib_pd *pd; @@ -146,12 +154,6 @@ static int num_pages(int len) return 1 + (((len - 1) & PAGE_MASK) >> PAGE_SHIFT); } -/* XXX: really should move to a generic header sooner or later.. */ -static inline u32 get_unaligned_le24(const u8 *p) -{ - return (u32)p[0] | (u32)p[1] << 8 | (u32)p[2] << 16; -} - static inline bool nvmet_rdma_need_data_in(struct nvmet_rdma_rsp *rsp) { return nvme_is_write(rsp->req.cmd) && @@ -467,7 +469,7 @@ static int nvmet_rdma_post_recv(struct nvmet_rdma_device *ndev, if (ndev->srq) ret = ib_post_srq_recv(ndev->srq, &cmd->wr, NULL); else - ret = ib_post_recv(cmd->queue->cm_id->qp, &cmd->wr, NULL); + ret = ib_post_recv(cmd->queue->qp, &cmd->wr, NULL); if (unlikely(ret)) pr_err("post_recv cmd failed\n"); @@ -506,7 +508,7 @@ static void nvmet_rdma_release_rsp(struct nvmet_rdma_rsp *rsp) atomic_add(1 + rsp->n_rdma, &queue->sq_wr_avail); if (rsp->n_rdma) { - rdma_rw_ctx_destroy(&rsp->rw, queue->cm_id->qp, + rdma_rw_ctx_destroy(&rsp->rw, queue->qp, queue->cm_id->port_num, rsp->req.sg, rsp->req.sg_cnt, nvmet_data_dir(&rsp->req)); } @@ -590,7 +592,7 @@ static void nvmet_rdma_read_data_done(struct ib_cq *cq, struct ib_wc *wc) WARN_ON(rsp->n_rdma <= 0); atomic_add(rsp->n_rdma, &queue->sq_wr_avail); - rdma_rw_ctx_destroy(&rsp->rw, queue->cm_id->qp, + rdma_rw_ctx_destroy(&rsp->rw, queue->qp, queue->cm_id->port_num, rsp->req.sg, rsp->req.sg_cnt, nvmet_data_dir(&rsp->req)); rsp->n_rdma = 0; @@ -745,7 +747,7 @@ static bool nvmet_rdma_execute_command(struct nvmet_rdma_rsp *rsp) } if (nvmet_rdma_need_data_in(rsp)) { - if (rdma_rw_ctx_post(&rsp->rw, queue->cm_id->qp, + if (rdma_rw_ctx_post(&rsp->rw, queue->qp, queue->cm_id->port_num, &rsp->read_cqe, NULL)) nvmet_req_complete(&rsp->req, NVME_SC_DATA_XFER_ERROR); } else { @@ -917,7 +919,8 @@ static void nvmet_rdma_free_dev(struct kref *ref) static struct nvmet_rdma_device * nvmet_rdma_find_get_device(struct rdma_cm_id *cm_id) { - struct nvmet_port *port = cm_id->context; + struct nvmet_rdma_port *port = cm_id->context; + struct nvmet_port *nport = port->nport; struct nvmet_rdma_device *ndev; int inline_page_count; int inline_sge_count; @@ -934,17 +937,17 @@ nvmet_rdma_find_get_device(struct rdma_cm_id *cm_id) if (!ndev) goto out_err; - inline_page_count = num_pages(port->inline_data_size); + inline_page_count = num_pages(nport->inline_data_size); inline_sge_count = max(cm_id->device->attrs.max_sge_rd, cm_id->device->attrs.max_recv_sge) - 1; if (inline_page_count > inline_sge_count) { pr_warn("inline_data_size %d cannot be supported by device %s. Reducing to %lu.\n", - port->inline_data_size, cm_id->device->name, + nport->inline_data_size, cm_id->device->name, inline_sge_count * PAGE_SIZE); - port->inline_data_size = inline_sge_count * PAGE_SIZE; + nport->inline_data_size = inline_sge_count * PAGE_SIZE; inline_page_count = inline_sge_count; } - ndev->inline_data_size = port->inline_data_size; + ndev->inline_data_size = nport->inline_data_size; ndev->inline_page_count = inline_page_count; ndev->device = cm_id->device; kref_init(&ndev->ref); @@ -1030,6 +1033,7 @@ static int nvmet_rdma_create_queue_ib(struct nvmet_rdma_queue *queue) pr_err("failed to create_qp ret= %d\n", ret); goto err_destroy_cq; } + queue->qp = queue->cm_id->qp; atomic_set(&queue->sq_wr_avail, qp_attr.cap.max_send_wr); @@ -1058,11 +1062,10 @@ err_destroy_cq: static void nvmet_rdma_destroy_queue_ib(struct nvmet_rdma_queue *queue) { - struct ib_qp *qp = queue->cm_id->qp; - - ib_drain_qp(qp); - rdma_destroy_id(queue->cm_id); - ib_destroy_qp(qp); + ib_drain_qp(queue->qp); + if (queue->cm_id) + rdma_destroy_id(queue->cm_id); + ib_destroy_qp(queue->qp); ib_free_cq(queue->cq); } @@ -1272,6 +1275,7 @@ static int nvmet_rdma_cm_accept(struct rdma_cm_id *cm_id, static int nvmet_rdma_queue_connect(struct rdma_cm_id *cm_id, struct rdma_cm_event *event) { + struct nvmet_rdma_port *port = cm_id->context; struct nvmet_rdma_device *ndev; struct nvmet_rdma_queue *queue; int ret = -EINVAL; @@ -1287,7 +1291,7 @@ static int nvmet_rdma_queue_connect(struct rdma_cm_id *cm_id, ret = -ENOMEM; goto put_device; } - queue->port = cm_id->context; + queue->port = port->nport; if (queue->host_qid == 0) { /* Let inflight controller teardown complete */ @@ -1296,9 +1300,12 @@ static int nvmet_rdma_queue_connect(struct rdma_cm_id *cm_id, ret = nvmet_rdma_cm_accept(cm_id, queue, &event->param.conn); if (ret) { - schedule_work(&queue->release_work); - /* Destroying rdma_cm id is not needed here */ - return 0; + /* + * Don't destroy the cm_id in free path, as we implicitly + * destroy the cm_id here with non-zero ret code. + */ + queue->cm_id = NULL; + goto free_queue; } mutex_lock(&nvmet_rdma_queue_mutex); @@ -1307,6 +1314,8 @@ static int nvmet_rdma_queue_connect(struct rdma_cm_id *cm_id, return 0; +free_queue: + nvmet_rdma_free_queue(queue); put_device: kref_put(&ndev->ref, nvmet_rdma_free_dev); @@ -1412,7 +1421,7 @@ static void nvmet_rdma_queue_connect_fail(struct rdma_cm_id *cm_id, static int nvmet_rdma_device_removal(struct rdma_cm_id *cm_id, struct nvmet_rdma_queue *queue) { - struct nvmet_port *port; + struct nvmet_rdma_port *port; if (queue) { /* @@ -1431,7 +1440,7 @@ static int nvmet_rdma_device_removal(struct rdma_cm_id *cm_id, * cm_id destroy. use atomic xchg to make sure * we don't compete with remove_port. */ - if (xchg(&port->priv, NULL) != cm_id) + if (xchg(&port->cm_id, NULL) != cm_id) return 0; /* @@ -1462,6 +1471,13 @@ static int nvmet_rdma_cm_handler(struct rdma_cm_id *cm_id, nvmet_rdma_queue_established(queue); break; case RDMA_CM_EVENT_ADDR_CHANGE: + if (!queue) { + struct nvmet_rdma_port *port = cm_id->context; + + schedule_delayed_work(&port->repair_work, 0); + break; + } + /* FALLTHROUGH */ case RDMA_CM_EVENT_DISCONNECTED: case RDMA_CM_EVENT_TIMEWAIT_EXIT: nvmet_rdma_queue_disconnect(queue); @@ -1504,42 +1520,19 @@ restart: mutex_unlock(&nvmet_rdma_queue_mutex); } -static int nvmet_rdma_add_port(struct nvmet_port *port) +static void nvmet_rdma_disable_port(struct nvmet_rdma_port *port) { - struct rdma_cm_id *cm_id; - struct sockaddr_storage addr = { }; - __kernel_sa_family_t af; - int ret; - - switch (port->disc_addr.adrfam) { - case NVMF_ADDR_FAMILY_IP4: - af = AF_INET; - break; - case NVMF_ADDR_FAMILY_IP6: - af = AF_INET6; - break; - default: - pr_err("address family %d not supported\n", - port->disc_addr.adrfam); - return -EINVAL; - } + struct rdma_cm_id *cm_id = xchg(&port->cm_id, NULL); - if (port->inline_data_size < 0) { - port->inline_data_size = NVMET_RDMA_DEFAULT_INLINE_DATA_SIZE; - } else if (port->inline_data_size > NVMET_RDMA_MAX_INLINE_DATA_SIZE) { - pr_warn("inline_data_size %u is too large, reducing to %u\n", - port->inline_data_size, - NVMET_RDMA_MAX_INLINE_DATA_SIZE); - port->inline_data_size = NVMET_RDMA_MAX_INLINE_DATA_SIZE; - } + if (cm_id) + rdma_destroy_id(cm_id); +} - ret = inet_pton_with_scope(&init_net, af, port->disc_addr.traddr, - port->disc_addr.trsvcid, &addr); - if (ret) { - pr_err("malformed ip/port passed: %s:%s\n", - port->disc_addr.traddr, port->disc_addr.trsvcid); - return ret; - } +static int nvmet_rdma_enable_port(struct nvmet_rdma_port *port) +{ + struct sockaddr *addr = (struct sockaddr *)&port->addr; + struct rdma_cm_id *cm_id; + int ret; cm_id = rdma_create_id(&init_net, nvmet_rdma_cm_handler, port, RDMA_PS_TCP, IB_QPT_RC); @@ -1558,23 +1551,19 @@ static int nvmet_rdma_add_port(struct nvmet_port *port) goto out_destroy_id; } - ret = rdma_bind_addr(cm_id, (struct sockaddr *)&addr); + ret = rdma_bind_addr(cm_id, addr); if (ret) { - pr_err("binding CM ID to %pISpcs failed (%d)\n", - (struct sockaddr *)&addr, ret); + pr_err("binding CM ID to %pISpcs failed (%d)\n", addr, ret); goto out_destroy_id; } ret = rdma_listen(cm_id, 128); if (ret) { - pr_err("listening to %pISpcs failed (%d)\n", - (struct sockaddr *)&addr, ret); + pr_err("listening to %pISpcs failed (%d)\n", addr, ret); goto out_destroy_id; } - pr_info("enabling port %d (%pISpcs)\n", - le16_to_cpu(port->disc_addr.portid), (struct sockaddr *)&addr); - port->priv = cm_id; + port->cm_id = cm_id; return 0; out_destroy_id: @@ -1582,18 +1571,92 @@ out_destroy_id: return ret; } -static void nvmet_rdma_remove_port(struct nvmet_port *port) +static void nvmet_rdma_repair_port_work(struct work_struct *w) { - struct rdma_cm_id *cm_id = xchg(&port->priv, NULL); + struct nvmet_rdma_port *port = container_of(to_delayed_work(w), + struct nvmet_rdma_port, repair_work); + int ret; - if (cm_id) - rdma_destroy_id(cm_id); + nvmet_rdma_disable_port(port); + ret = nvmet_rdma_enable_port(port); + if (ret) + schedule_delayed_work(&port->repair_work, 5 * HZ); +} + +static int nvmet_rdma_add_port(struct nvmet_port *nport) +{ + struct nvmet_rdma_port *port; + __kernel_sa_family_t af; + int ret; + + port = kzalloc(sizeof(*port), GFP_KERNEL); + if (!port) + return -ENOMEM; + + nport->priv = port; + port->nport = nport; + INIT_DELAYED_WORK(&port->repair_work, nvmet_rdma_repair_port_work); + + switch (nport->disc_addr.adrfam) { + case NVMF_ADDR_FAMILY_IP4: + af = AF_INET; + break; + case NVMF_ADDR_FAMILY_IP6: + af = AF_INET6; + break; + default: + pr_err("address family %d not supported\n", + nport->disc_addr.adrfam); + ret = -EINVAL; + goto out_free_port; + } + + if (nport->inline_data_size < 0) { + nport->inline_data_size = NVMET_RDMA_DEFAULT_INLINE_DATA_SIZE; + } else if (nport->inline_data_size > NVMET_RDMA_MAX_INLINE_DATA_SIZE) { + pr_warn("inline_data_size %u is too large, reducing to %u\n", + nport->inline_data_size, + NVMET_RDMA_MAX_INLINE_DATA_SIZE); + nport->inline_data_size = NVMET_RDMA_MAX_INLINE_DATA_SIZE; + } + + ret = inet_pton_with_scope(&init_net, af, nport->disc_addr.traddr, + nport->disc_addr.trsvcid, &port->addr); + if (ret) { + pr_err("malformed ip/port passed: %s:%s\n", + nport->disc_addr.traddr, nport->disc_addr.trsvcid); + goto out_free_port; + } + + ret = nvmet_rdma_enable_port(port); + if (ret) + goto out_free_port; + + pr_info("enabling port %d (%pISpcs)\n", + le16_to_cpu(nport->disc_addr.portid), + (struct sockaddr *)&port->addr); + + return 0; + +out_free_port: + kfree(port); + return ret; +} + +static void nvmet_rdma_remove_port(struct nvmet_port *nport) +{ + struct nvmet_rdma_port *port = nport->priv; + + cancel_delayed_work_sync(&port->repair_work); + nvmet_rdma_disable_port(port); + kfree(port); } static void nvmet_rdma_disc_port_addr(struct nvmet_req *req, - struct nvmet_port *port, char *traddr) + struct nvmet_port *nport, char *traddr) { - struct rdma_cm_id *cm_id = port->priv; + struct nvmet_rdma_port *port = nport->priv; + struct rdma_cm_id *cm_id = port->cm_id; if (inet_addr_is_any((struct sockaddr *)&cm_id->route.addr.src_addr)) { struct nvmet_rdma_rsp *rsp = @@ -1603,7 +1666,7 @@ static void nvmet_rdma_disc_port_addr(struct nvmet_req *req, sprintf(traddr, "%pISc", addr); } else { - memcpy(traddr, port->disc_addr.traddr, NVMF_TRADDR_SIZE); + memcpy(traddr, nport->disc_addr.traddr, NVMF_TRADDR_SIZE); } } |