diff options
Diffstat (limited to 'drivers/nvme/host/tcp.c')
| -rw-r--r-- | drivers/nvme/host/tcp.c | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c index 7723a4989524..42c0598c31f2 100644 --- a/drivers/nvme/host/tcp.c +++ b/drivers/nvme/host/tcp.c @@ -208,6 +208,18 @@ static inline u8 nvme_tcp_ddgst_len(struct nvme_tcp_queue *queue) return queue->data_digest ? NVME_TCP_DIGEST_LENGTH : 0; } +static inline void *nvme_tcp_req_cmd_pdu(struct nvme_tcp_request *req) +{ + return req->pdu; +} + +static inline void *nvme_tcp_req_data_pdu(struct nvme_tcp_request *req) +{ + /* use the pdu space in the back for the data pdu */ + return req->pdu + sizeof(struct nvme_tcp_cmd_pdu) - + sizeof(struct nvme_tcp_data_pdu); +} + static inline size_t nvme_tcp_inline_data_size(struct nvme_tcp_request *req) { if (nvme_is_fabrics(req->req.cmd)) @@ -614,7 +626,7 @@ static int nvme_tcp_handle_comp(struct nvme_tcp_queue *queue, static void nvme_tcp_setup_h2c_data_pdu(struct nvme_tcp_request *req) { - struct nvme_tcp_data_pdu *data = req->pdu; + struct nvme_tcp_data_pdu *data = nvme_tcp_req_data_pdu(req); struct nvme_tcp_queue *queue = req->queue; struct request *rq = blk_mq_rq_from_pdu(req); u32 h2cdata_sent = req->pdu_len; @@ -1038,7 +1050,7 @@ static int nvme_tcp_try_send_data(struct nvme_tcp_request *req) static int nvme_tcp_try_send_cmd_pdu(struct nvme_tcp_request *req) { struct nvme_tcp_queue *queue = req->queue; - struct nvme_tcp_cmd_pdu *pdu = req->pdu; + struct nvme_tcp_cmd_pdu *pdu = nvme_tcp_req_cmd_pdu(req); bool inline_data = nvme_tcp_has_inline_data(req); u8 hdgst = nvme_tcp_hdgst_len(queue); int len = sizeof(*pdu) + hdgst - req->offset; @@ -1077,7 +1089,7 @@ static int nvme_tcp_try_send_cmd_pdu(struct nvme_tcp_request *req) static int nvme_tcp_try_send_data_pdu(struct nvme_tcp_request *req) { struct nvme_tcp_queue *queue = req->queue; - struct nvme_tcp_data_pdu *pdu = req->pdu; + struct nvme_tcp_data_pdu *pdu = nvme_tcp_req_data_pdu(req); u8 hdgst = nvme_tcp_hdgst_len(queue); int len = sizeof(*pdu) - req->offset + hdgst; int ret; @@ -2284,7 +2296,7 @@ static enum blk_eh_timer_return nvme_tcp_timeout(struct request *rq) { struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); struct nvme_ctrl *ctrl = &req->queue->ctrl->ctrl; - struct nvme_tcp_cmd_pdu *pdu = req->pdu; + struct nvme_tcp_cmd_pdu *pdu = nvme_tcp_req_cmd_pdu(req); u8 opc = pdu->cmd.common.opcode, fctype = pdu->cmd.fabrics.fctype; int qid = nvme_tcp_queue_id(req->queue); @@ -2323,7 +2335,7 @@ static blk_status_t nvme_tcp_map_data(struct nvme_tcp_queue *queue, struct request *rq) { struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); - struct nvme_tcp_cmd_pdu *pdu = req->pdu; + struct nvme_tcp_cmd_pdu *pdu = nvme_tcp_req_cmd_pdu(req); struct nvme_command *c = &pdu->cmd; c->common.flags |= NVME_CMD_SGL_METABUF; @@ -2343,7 +2355,7 @@ static blk_status_t nvme_tcp_setup_cmd_pdu(struct nvme_ns *ns, struct request *rq) { struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); - struct nvme_tcp_cmd_pdu *pdu = req->pdu; + struct nvme_tcp_cmd_pdu *pdu = nvme_tcp_req_cmd_pdu(req); struct nvme_tcp_queue *queue = req->queue; u8 hdgst = nvme_tcp_hdgst_len(queue), ddgst = 0; blk_status_t ret; @@ -2682,6 +2694,15 @@ static struct nvmf_transport_ops nvme_tcp_transport = { static int __init nvme_tcp_init_module(void) { + BUILD_BUG_ON(sizeof(struct nvme_tcp_hdr) != 8); + BUILD_BUG_ON(sizeof(struct nvme_tcp_cmd_pdu) != 72); + BUILD_BUG_ON(sizeof(struct nvme_tcp_data_pdu) != 24); + BUILD_BUG_ON(sizeof(struct nvme_tcp_rsp_pdu) != 24); + BUILD_BUG_ON(sizeof(struct nvme_tcp_r2t_pdu) != 24); + BUILD_BUG_ON(sizeof(struct nvme_tcp_icreq_pdu) != 128); + BUILD_BUG_ON(sizeof(struct nvme_tcp_icresp_pdu) != 128); + BUILD_BUG_ON(sizeof(struct nvme_tcp_term_pdu) != 24); + nvme_tcp_wq = alloc_workqueue("nvme_tcp_wq", WQ_MEM_RECLAIM | WQ_HIGHPRI, 0); if (!nvme_tcp_wq) |