A C2HData PDU with the SUCCESS flag set indicates that the I/O was
completed by the controller successfully and means that a subsequent
completion response capsule PDU will be ommitted.
If we see this flag, fisrt we check that LAST_PDU flag is set as well,
and then we complete the request when the data transfer (and data digest
verification if its on) is done.
While we're at it, reuse a bit of code with nvme_fail_request.
Reported-by: Steve Blightman <steve.blightman@oracle.com>
Suggested-by: Oliver Smith-Denny <osmithde@cisco.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Oliver Smith-Denny <osmithde@cisco.com>
Tested-by: Oliver Smith-Denny <osmithde@cisco.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
queue->data_remaining = le32_to_cpu(pdu->data_length);
queue->data_remaining = le32_to_cpu(pdu->data_length);
+ if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS &&
+ unlikely(!(pdu->hdr.flags & NVME_TCP_F_DATA_LAST))) {
+ dev_err(queue->ctrl->ctrl.device,
+ "queue %d tag %#x SUCCESS set but not last PDU\n",
+ nvme_tcp_queue_id(queue), rq->tag);
+ nvme_tcp_error_recovery(&queue->ctrl->ctrl);
+ return -EPROTO;
+ }
+
+static inline void nvme_tcp_end_request(struct request *rq, __le16 status)
+{
+ union nvme_result res = {};
+
+ nvme_end_request(rq, cpu_to_le16(status << 1), res);
+}
+
+
static int nvme_tcp_recv_data(struct nvme_tcp_queue *queue, struct sk_buff *skb,
unsigned int *offset, size_t *len)
{
static int nvme_tcp_recv_data(struct nvme_tcp_queue *queue, struct sk_buff *skb,
unsigned int *offset, size_t *len)
{
nvme_tcp_ddgst_final(queue->rcv_hash, &queue->exp_ddgst);
queue->ddgst_remaining = NVME_TCP_DIGEST_LENGTH;
} else {
nvme_tcp_ddgst_final(queue->rcv_hash, &queue->exp_ddgst);
queue->ddgst_remaining = NVME_TCP_DIGEST_LENGTH;
} else {
+ if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS)
+ nvme_tcp_end_request(rq, NVME_SC_SUCCESS);
nvme_tcp_init_recv_ctx(queue);
}
}
nvme_tcp_init_recv_ctx(queue);
}
}
static int nvme_tcp_recv_ddgst(struct nvme_tcp_queue *queue,
struct sk_buff *skb, unsigned int *offset, size_t *len)
{
static int nvme_tcp_recv_ddgst(struct nvme_tcp_queue *queue,
struct sk_buff *skb, unsigned int *offset, size_t *len)
{
+ struct nvme_tcp_data_pdu *pdu = (void *)queue->pdu;
char *ddgst = (char *)&queue->recv_ddgst;
size_t recv_len = min_t(size_t, *len, queue->ddgst_remaining);
off_t off = NVME_TCP_DIGEST_LENGTH - queue->ddgst_remaining;
char *ddgst = (char *)&queue->recv_ddgst;
size_t recv_len = min_t(size_t, *len, queue->ddgst_remaining);
off_t off = NVME_TCP_DIGEST_LENGTH - queue->ddgst_remaining;
+ if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS) {
+ struct request *rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue),
+ pdu->command_id);
+
+ nvme_tcp_end_request(rq, NVME_SC_SUCCESS);
+ }
+
nvme_tcp_init_recv_ctx(queue);
return 0;
}
nvme_tcp_init_recv_ctx(queue);
return 0;
}
static void nvme_tcp_fail_request(struct nvme_tcp_request *req)
{
static void nvme_tcp_fail_request(struct nvme_tcp_request *req)
{
- union nvme_result res = {};
-
- nvme_end_request(blk_mq_rq_from_pdu(req),
- cpu_to_le16(NVME_SC_DATA_XFER_ERROR), res);
+ nvme_tcp_end_request(blk_mq_rq_from_pdu(req), NVME_SC_DATA_XFER_ERROR);
}
static int nvme_tcp_try_send_data(struct nvme_tcp_request *req)
}
static int nvme_tcp_try_send_data(struct nvme_tcp_request *req)