blk-mq: switch ->queue_rq return value to blk_status_t
Use the same values for use for request completion errors as the return
value from ->queue_rq. BLK_STS_RESOURCE is special cased to cause
a requeue, and all the others are completed as-is.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/block/blk-mq.c b/block/blk-mq.c
index adcc1c0..7af78b1 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -924,7 +924,7 @@ bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list)
{
struct blk_mq_hw_ctx *hctx;
struct request *rq;
- int errors, queued, ret = BLK_MQ_RQ_QUEUE_OK;
+ int errors, queued;
if (list_empty(list))
return false;
@@ -935,6 +935,7 @@ bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list)
errors = queued = 0;
do {
struct blk_mq_queue_data bd;
+ blk_status_t ret;
rq = list_first_entry(list, struct request, queuelist);
if (!blk_mq_get_driver_tag(rq, &hctx, false)) {
@@ -975,25 +976,20 @@ bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list)
}
ret = q->mq_ops->queue_rq(hctx, &bd);
- switch (ret) {
- case BLK_MQ_RQ_QUEUE_OK:
- queued++;
- break;
- case BLK_MQ_RQ_QUEUE_BUSY:
+ if (ret == BLK_STS_RESOURCE) {
blk_mq_put_driver_tag_hctx(hctx, rq);
list_add(&rq->queuelist, list);
__blk_mq_requeue_request(rq);
break;
- default:
- pr_err("blk-mq: bad return on queue: %d\n", ret);
- case BLK_MQ_RQ_QUEUE_ERROR:
- errors++;
- blk_mq_end_request(rq, BLK_STS_IOERR);
- break;
}
- if (ret == BLK_MQ_RQ_QUEUE_BUSY)
- break;
+ if (unlikely(ret != BLK_STS_OK)) {
+ errors++;
+ blk_mq_end_request(rq, BLK_STS_IOERR);
+ continue;
+ }
+
+ queued++;
} while (!list_empty(list));
hctx->dispatched[queued_to_index(queued)]++;
@@ -1031,7 +1027,7 @@ bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list)
* - blk_mq_run_hw_queue() checks whether or not a queue has
* been stopped before rerunning a queue.
* - Some but not all block drivers stop a queue before
- * returning BLK_MQ_RQ_QUEUE_BUSY. Two exceptions are scsi-mq
+ * returning BLK_STS_RESOURCE. Two exceptions are scsi-mq
* and dm-rq.
*/
if (!blk_mq_sched_needs_restart(hctx) &&
@@ -1410,7 +1406,7 @@ static void __blk_mq_try_issue_directly(struct request *rq, blk_qc_t *cookie,
};
struct blk_mq_hw_ctx *hctx;
blk_qc_t new_cookie;
- int ret;
+ blk_status_t ret;
if (q->elevator)
goto insert;
@@ -1426,18 +1422,19 @@ static void __blk_mq_try_issue_directly(struct request *rq, blk_qc_t *cookie,
* would have done
*/
ret = q->mq_ops->queue_rq(hctx, &bd);
- if (ret == BLK_MQ_RQ_QUEUE_OK) {
+ switch (ret) {
+ case BLK_STS_OK:
*cookie = new_cookie;
return;
- }
-
- if (ret == BLK_MQ_RQ_QUEUE_ERROR) {
+ case BLK_STS_RESOURCE:
+ __blk_mq_requeue_request(rq);
+ goto insert;
+ default:
*cookie = BLK_QC_T_NONE;
- blk_mq_end_request(rq, BLK_STS_IOERR);
+ blk_mq_end_request(rq, ret);
return;
}
- __blk_mq_requeue_request(rq);
insert:
blk_mq_sched_insert_request(rq, false, true, false, may_sleep);
}
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 4caf633..70fd7e0 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1674,7 +1674,7 @@ int loop_unregister_transfer(int number)
EXPORT_SYMBOL(loop_register_transfer);
EXPORT_SYMBOL(loop_unregister_transfer);
-static int loop_queue_rq(struct blk_mq_hw_ctx *hctx,
+static blk_status_t loop_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
struct loop_cmd *cmd = blk_mq_rq_to_pdu(bd->rq);
@@ -1683,7 +1683,7 @@ static int loop_queue_rq(struct blk_mq_hw_ctx *hctx,
blk_mq_start_request(bd->rq);
if (lo->lo_state != Lo_bound)
- return BLK_MQ_RQ_QUEUE_ERROR;
+ return BLK_STS_IOERR;
switch (req_op(cmd->rq)) {
case REQ_OP_FLUSH:
@@ -1698,7 +1698,7 @@ static int loop_queue_rq(struct blk_mq_hw_ctx *hctx,
kthread_queue_work(&lo->worker, &cmd->work);
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
}
static void loop_handle_cmd(struct loop_cmd *cmd)
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index ee6f66b..d8618a7 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -3633,8 +3633,8 @@ static bool mtip_check_unal_depth(struct blk_mq_hw_ctx *hctx,
return false;
}
-static int mtip_issue_reserved_cmd(struct blk_mq_hw_ctx *hctx,
- struct request *rq)
+static blk_status_t mtip_issue_reserved_cmd(struct blk_mq_hw_ctx *hctx,
+ struct request *rq)
{
struct driver_data *dd = hctx->queue->queuedata;
struct mtip_int_cmd *icmd = rq->special;
@@ -3642,7 +3642,7 @@ static int mtip_issue_reserved_cmd(struct blk_mq_hw_ctx *hctx,
struct mtip_cmd_sg *command_sg;
if (mtip_commands_active(dd->port))
- return BLK_MQ_RQ_QUEUE_BUSY;
+ return BLK_STS_RESOURCE;
/* Populate the SG list */
cmd->command_header->opts =
@@ -3666,10 +3666,10 @@ static int mtip_issue_reserved_cmd(struct blk_mq_hw_ctx *hctx,
blk_mq_start_request(rq);
mtip_issue_non_ncq_command(dd->port, rq->tag);
- return BLK_MQ_RQ_QUEUE_OK;
+ return 0;
}
-static int mtip_queue_rq(struct blk_mq_hw_ctx *hctx,
+static blk_status_t mtip_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
struct request *rq = bd->rq;
@@ -3681,15 +3681,14 @@ static int mtip_queue_rq(struct blk_mq_hw_ctx *hctx,
return mtip_issue_reserved_cmd(hctx, rq);
if (unlikely(mtip_check_unal_depth(hctx, rq)))
- return BLK_MQ_RQ_QUEUE_BUSY;
+ return BLK_STS_RESOURCE;
blk_mq_start_request(rq);
ret = mtip_submit_request(hctx, rq);
if (likely(!ret))
- return BLK_MQ_RQ_QUEUE_OK;
-
- return BLK_MQ_RQ_QUEUE_ERROR;
+ return BLK_STS_OK;
+ return BLK_STS_IOERR;
}
static void mtip_free_cmd(struct blk_mq_tag_set *set, struct request *rq,
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 978d2d2..36839dc 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -469,7 +469,7 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index)
nsock->pending = req;
nsock->sent = sent;
}
- return BLK_MQ_RQ_QUEUE_BUSY;
+ return BLK_STS_RESOURCE;
}
dev_err_ratelimited(disk_to_dev(nbd->disk),
"Send control failed (result %d)\n", result);
@@ -510,7 +510,7 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index)
*/
nsock->pending = req;
nsock->sent = sent;
- return BLK_MQ_RQ_QUEUE_BUSY;
+ return BLK_STS_RESOURCE;
}
dev_err(disk_to_dev(nbd->disk),
"Send data failed (result %d)\n",
@@ -798,7 +798,7 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index)
return ret;
}
-static int nbd_queue_rq(struct blk_mq_hw_ctx *hctx,
+static blk_status_t nbd_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
struct nbd_cmd *cmd = blk_mq_rq_to_pdu(bd->rq);
@@ -822,13 +822,9 @@ static int nbd_queue_rq(struct blk_mq_hw_ctx *hctx,
* appropriate.
*/
ret = nbd_handle_cmd(cmd, hctx->queue_num);
- if (ret < 0)
- ret = BLK_MQ_RQ_QUEUE_ERROR;
- if (!ret)
- ret = BLK_MQ_RQ_QUEUE_OK;
complete(&cmd->send_complete);
- return ret;
+ return ret < 0 ? BLK_STS_IOERR : BLK_STS_OK;
}
static int nbd_add_socket(struct nbd_device *nbd, unsigned long arg,
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c
index e6b81d3..586dfff 100644
--- a/drivers/block/null_blk.c
+++ b/drivers/block/null_blk.c
@@ -356,7 +356,7 @@ static void null_request_fn(struct request_queue *q)
}
}
-static int null_queue_rq(struct blk_mq_hw_ctx *hctx,
+static blk_status_t null_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
struct nullb_cmd *cmd = blk_mq_rq_to_pdu(bd->rq);
@@ -373,7 +373,7 @@ static int null_queue_rq(struct blk_mq_hw_ctx *hctx,
blk_mq_start_request(bd->rq);
null_handle_cmd(cmd);
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
}
static void null_init_queue(struct nullb *nullb, struct nullb_queue *nq)
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 3e8b43d..74a6791 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -4154,14 +4154,14 @@ static void rbd_queue_workfn(struct work_struct *work)
blk_mq_end_request(rq, errno_to_blk_status(result));
}
-static int rbd_queue_rq(struct blk_mq_hw_ctx *hctx,
+static blk_status_t rbd_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
struct request *rq = bd->rq;
struct work_struct *work = blk_mq_rq_to_pdu(rq);
queue_work(rbd_wq, work);
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
}
static void rbd_free_disk(struct rbd_device *rbd_dev)
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 205b74d..e59bd45 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -214,7 +214,7 @@ static void virtblk_done(struct virtqueue *vq)
spin_unlock_irqrestore(&vblk->vqs[qid].lock, flags);
}
-static int virtio_queue_rq(struct blk_mq_hw_ctx *hctx,
+static blk_status_t virtio_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
struct virtio_blk *vblk = hctx->queue->queuedata;
@@ -246,7 +246,7 @@ static int virtio_queue_rq(struct blk_mq_hw_ctx *hctx,
break;
default:
WARN_ON_ONCE(1);
- return BLK_MQ_RQ_QUEUE_ERROR;
+ return BLK_STS_IOERR;
}
vbr->out_hdr.type = cpu_to_virtio32(vblk->vdev, type);
@@ -276,8 +276,8 @@ static int virtio_queue_rq(struct blk_mq_hw_ctx *hctx,
/* Out of mem doesn't actually happen, since we fall back
* to direct descriptors */
if (err == -ENOMEM || err == -ENOSPC)
- return BLK_MQ_RQ_QUEUE_BUSY;
- return BLK_MQ_RQ_QUEUE_ERROR;
+ return BLK_STS_RESOURCE;
+ return BLK_STS_IOERR;
}
if (bd->last && virtqueue_kick_prepare(vblk->vqs[qid].vq))
@@ -286,7 +286,7 @@ static int virtio_queue_rq(struct blk_mq_hw_ctx *hctx,
if (notify)
virtqueue_notify(vblk->vqs[qid].vq);
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
}
/* return id (s/n) string for *disk to *id_str
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index aedc3c7..2f468cf 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -881,7 +881,7 @@ static inline bool blkif_request_flush_invalid(struct request *req,
!info->feature_fua));
}
-static int blkif_queue_rq(struct blk_mq_hw_ctx *hctx,
+static blk_status_t blkif_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *qd)
{
unsigned long flags;
@@ -904,16 +904,16 @@ static int blkif_queue_rq(struct blk_mq_hw_ctx *hctx,
flush_requests(rinfo);
spin_unlock_irqrestore(&rinfo->ring_lock, flags);
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
out_err:
spin_unlock_irqrestore(&rinfo->ring_lock, flags);
- return BLK_MQ_RQ_QUEUE_ERROR;
+ return BLK_STS_IOERR;
out_busy:
spin_unlock_irqrestore(&rinfo->ring_lock, flags);
blk_mq_stop_hw_queue(hctx);
- return BLK_MQ_RQ_QUEUE_BUSY;
+ return BLK_STS_RESOURCE;
}
static void blkif_complete_rq(struct request *rq)
diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index bee3343..63402f8a 100644
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -727,7 +727,7 @@ static int dm_mq_init_request(struct blk_mq_tag_set *set, struct request *rq,
return __dm_rq_init_rq(set->driver_data, rq);
}
-static int dm_mq_queue_rq(struct blk_mq_hw_ctx *hctx,
+static blk_status_t dm_mq_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
struct request *rq = bd->rq;
@@ -744,7 +744,7 @@ static int dm_mq_queue_rq(struct blk_mq_hw_ctx *hctx,
}
if (ti->type->busy && ti->type->busy(ti))
- return BLK_MQ_RQ_QUEUE_BUSY;
+ return BLK_STS_RESOURCE;
dm_start_request(md, rq);
@@ -762,10 +762,10 @@ static int dm_mq_queue_rq(struct blk_mq_hw_ctx *hctx,
rq_end_stats(md, rq);
rq_completed(md, rq_data_dir(rq), false);
blk_mq_delay_run_hw_queue(hctx, 100/*ms*/);
- return BLK_MQ_RQ_QUEUE_BUSY;
+ return BLK_STS_RESOURCE;
}
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
}
static const struct blk_mq_ops dm_mq_ops = {
diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
index 3ecdb39..c3963f8 100644
--- a/drivers/mtd/ubi/block.c
+++ b/drivers/mtd/ubi/block.c
@@ -316,7 +316,7 @@ static void ubiblock_do_work(struct work_struct *work)
blk_mq_end_request(req, errno_to_blk_status(ret));
}
-static int ubiblock_queue_rq(struct blk_mq_hw_ctx *hctx,
+static blk_status_t ubiblock_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
struct request *req = bd->rq;
@@ -327,9 +327,9 @@ static int ubiblock_queue_rq(struct blk_mq_hw_ctx *hctx,
case REQ_OP_READ:
ubi_sgl_init(&pdu->usgl);
queue_work(dev->wq, &pdu->work);
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
default:
- return BLK_MQ_RQ_QUEUE_ERROR;
+ return BLK_STS_IOERR;
}
}
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 07e95c7..4e193b9 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -283,7 +283,7 @@ static inline void nvme_setup_flush(struct nvme_ns *ns,
cmnd->common.nsid = cpu_to_le32(ns->ns_id);
}
-static inline int nvme_setup_discard(struct nvme_ns *ns, struct request *req,
+static blk_status_t nvme_setup_discard(struct nvme_ns *ns, struct request *req,
struct nvme_command *cmnd)
{
unsigned short segments = blk_rq_nr_discard_segments(req), n = 0;
@@ -292,7 +292,7 @@ static inline int nvme_setup_discard(struct nvme_ns *ns, struct request *req,
range = kmalloc_array(segments, sizeof(*range), GFP_ATOMIC);
if (!range)
- return BLK_MQ_RQ_QUEUE_BUSY;
+ return BLK_STS_RESOURCE;
__rq_for_each_bio(bio, req) {
u64 slba = nvme_block_nr(ns, bio->bi_iter.bi_sector);
@@ -306,7 +306,7 @@ static inline int nvme_setup_discard(struct nvme_ns *ns, struct request *req,
if (WARN_ON_ONCE(n != segments)) {
kfree(range);
- return BLK_MQ_RQ_QUEUE_ERROR;
+ return BLK_STS_IOERR;
}
memset(cmnd, 0, sizeof(*cmnd));
@@ -320,7 +320,7 @@ static inline int nvme_setup_discard(struct nvme_ns *ns, struct request *req,
req->special_vec.bv_len = sizeof(*range) * segments;
req->rq_flags |= RQF_SPECIAL_PAYLOAD;
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
}
static inline void nvme_setup_rw(struct nvme_ns *ns, struct request *req,
@@ -364,10 +364,10 @@ static inline void nvme_setup_rw(struct nvme_ns *ns, struct request *req,
cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt);
}
-int nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
+blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
struct nvme_command *cmd)
{
- int ret = BLK_MQ_RQ_QUEUE_OK;
+ blk_status_t ret = BLK_STS_OK;
if (!(req->rq_flags & RQF_DONTPREP)) {
nvme_req(req)->retries = 0;
@@ -394,7 +394,7 @@ int nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
break;
default:
WARN_ON_ONCE(1);
- return BLK_MQ_RQ_QUEUE_ERROR;
+ return BLK_STS_IOERR;
}
cmd->common.command_id = req->tag;
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 5b14cbe..eb0973a 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -1873,7 +1873,7 @@ nvme_fc_unmap_data(struct nvme_fc_ctrl *ctrl, struct request *rq,
* level FC exchange resource that is also outstanding. This must be
* considered in all cleanup operations.
*/
-static int
+static blk_status_t
nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue,
struct nvme_fc_fcp_op *op, u32 data_len,
enum nvmefc_fcp_datadir io_dir)
@@ -1888,10 +1888,10 @@ nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue,
* the target device is present
*/
if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE)
- return BLK_MQ_RQ_QUEUE_ERROR;
+ return BLK_STS_IOERR;
if (!nvme_fc_ctrl_get(ctrl))
- return BLK_MQ_RQ_QUEUE_ERROR;
+ return BLK_STS_IOERR;
/* format the FC-NVME CMD IU and fcp_req */
cmdiu->connection_id = cpu_to_be64(queue->connection_id);
@@ -1939,8 +1939,9 @@ nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue,
if (ret < 0) {
nvme_cleanup_cmd(op->rq);
nvme_fc_ctrl_put(ctrl);
- return (ret == -ENOMEM || ret == -EAGAIN) ?
- BLK_MQ_RQ_QUEUE_BUSY : BLK_MQ_RQ_QUEUE_ERROR;
+ if (ret == -ENOMEM || ret == -EAGAIN)
+ return BLK_STS_RESOURCE;
+ return BLK_STS_IOERR;
}
}
@@ -1966,19 +1967,19 @@ nvme_fc_start_fcp_op(struct nvme_fc_ctrl *ctrl, struct nvme_fc_queue *queue,
nvme_fc_ctrl_put(ctrl);
if (ret != -EBUSY)
- return BLK_MQ_RQ_QUEUE_ERROR;
+ return BLK_STS_IOERR;
if (op->rq) {
blk_mq_stop_hw_queues(op->rq->q);
blk_mq_delay_queue(queue->hctx, NVMEFC_QUEUE_DELAY);
}
- return BLK_MQ_RQ_QUEUE_BUSY;
+ return BLK_STS_RESOURCE;
}
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
}
-static int
+static blk_status_t
nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
@@ -1991,7 +1992,7 @@ nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx,
struct nvme_command *sqe = &cmdiu->sqe;
enum nvmefc_fcp_datadir io_dir;
u32 data_len;
- int ret;
+ blk_status_t ret;
ret = nvme_setup_cmd(ns, rq, sqe);
if (ret)
@@ -2046,7 +2047,7 @@ nvme_fc_submit_async_event(struct nvme_ctrl *arg, int aer_idx)
struct nvme_fc_fcp_op *aen_op;
unsigned long flags;
bool terminating = false;
- int ret;
+ blk_status_t ret;
if (aer_idx > NVME_FC_NR_AEN_COMMANDS)
return;
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 9d6a070..22ee60b 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -296,7 +296,7 @@ void nvme_start_freeze(struct nvme_ctrl *ctrl);
#define NVME_QID_ANY -1
struct request *nvme_alloc_request(struct request_queue *q,
struct nvme_command *cmd, unsigned int flags, int qid);
-int nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
+blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
struct nvme_command *cmd);
int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
void *buf, unsigned bufflen);
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 8198984..430d085 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -427,7 +427,7 @@ static __le64 **iod_list(struct request *req)
return (__le64 **)(iod->sg + blk_rq_nr_phys_segments(req));
}
-static int nvme_init_iod(struct request *rq, struct nvme_dev *dev)
+static blk_status_t nvme_init_iod(struct request *rq, struct nvme_dev *dev)
{
struct nvme_iod *iod = blk_mq_rq_to_pdu(rq);
int nseg = blk_rq_nr_phys_segments(rq);
@@ -436,7 +436,7 @@ static int nvme_init_iod(struct request *rq, struct nvme_dev *dev)
if (nseg > NVME_INT_PAGES || size > NVME_INT_BYTES(dev)) {
iod->sg = kmalloc(nvme_iod_alloc_size(dev, size, nseg), GFP_ATOMIC);
if (!iod->sg)
- return BLK_MQ_RQ_QUEUE_BUSY;
+ return BLK_STS_RESOURCE;
} else {
iod->sg = iod->inline_sg;
}
@@ -446,7 +446,7 @@ static int nvme_init_iod(struct request *rq, struct nvme_dev *dev)
iod->nents = 0;
iod->length = size;
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
}
static void nvme_free_iod(struct nvme_dev *dev, struct request *req)
@@ -616,21 +616,21 @@ static bool nvme_setup_prps(struct nvme_dev *dev, struct request *req)
return true;
}
-static int nvme_map_data(struct nvme_dev *dev, struct request *req,
+static blk_status_t nvme_map_data(struct nvme_dev *dev, struct request *req,
struct nvme_command *cmnd)
{
struct nvme_iod *iod = blk_mq_rq_to_pdu(req);
struct request_queue *q = req->q;
enum dma_data_direction dma_dir = rq_data_dir(req) ?
DMA_TO_DEVICE : DMA_FROM_DEVICE;
- int ret = BLK_MQ_RQ_QUEUE_ERROR;
+ blk_status_t ret = BLK_STS_IOERR;
sg_init_table(iod->sg, blk_rq_nr_phys_segments(req));
iod->nents = blk_rq_map_sg(q, req, iod->sg);
if (!iod->nents)
goto out;
- ret = BLK_MQ_RQ_QUEUE_BUSY;
+ ret = BLK_STS_RESOURCE;
if (!dma_map_sg_attrs(dev->dev, iod->sg, iod->nents, dma_dir,
DMA_ATTR_NO_WARN))
goto out;
@@ -638,7 +638,7 @@ static int nvme_map_data(struct nvme_dev *dev, struct request *req,
if (!nvme_setup_prps(dev, req))
goto out_unmap;
- ret = BLK_MQ_RQ_QUEUE_ERROR;
+ ret = BLK_STS_IOERR;
if (blk_integrity_rq(req)) {
if (blk_rq_count_integrity_sg(q, req->bio) != 1)
goto out_unmap;
@@ -658,7 +658,7 @@ static int nvme_map_data(struct nvme_dev *dev, struct request *req,
cmnd->rw.dptr.prp2 = cpu_to_le64(iod->first_dma);
if (blk_integrity_rq(req))
cmnd->rw.metadata = cpu_to_le64(sg_dma_address(&iod->meta_sg));
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
out_unmap:
dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir);
@@ -688,7 +688,7 @@ static void nvme_unmap_data(struct nvme_dev *dev, struct request *req)
/*
* NOTE: ns is NULL when called on the admin queue.
*/
-static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
+static blk_status_t nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
struct nvme_ns *ns = hctx->queue->queuedata;
@@ -696,7 +696,7 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
struct nvme_dev *dev = nvmeq->dev;
struct request *req = bd->rq;
struct nvme_command cmnd;
- int ret = BLK_MQ_RQ_QUEUE_OK;
+ blk_status_t ret = BLK_STS_OK;
/*
* If formated with metadata, require the block layer provide a buffer
@@ -705,38 +705,36 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
*/
if (ns && ns->ms && !blk_integrity_rq(req)) {
if (!(ns->pi_type && ns->ms == 8) &&
- !blk_rq_is_passthrough(req)) {
- blk_mq_end_request(req, BLK_STS_NOTSUPP);
- return BLK_MQ_RQ_QUEUE_OK;
- }
+ !blk_rq_is_passthrough(req))
+ return BLK_STS_NOTSUPP;
}
ret = nvme_setup_cmd(ns, req, &cmnd);
- if (ret != BLK_MQ_RQ_QUEUE_OK)
+ if (ret)
return ret;
ret = nvme_init_iod(req, dev);
- if (ret != BLK_MQ_RQ_QUEUE_OK)
+ if (ret)
goto out_free_cmd;
- if (blk_rq_nr_phys_segments(req))
+ if (blk_rq_nr_phys_segments(req)) {
ret = nvme_map_data(dev, req, &cmnd);
-
- if (ret != BLK_MQ_RQ_QUEUE_OK)
- goto out_cleanup_iod;
+ if (ret)
+ goto out_cleanup_iod;
+ }
blk_mq_start_request(req);
spin_lock_irq(&nvmeq->q_lock);
if (unlikely(nvmeq->cq_vector < 0)) {
- ret = BLK_MQ_RQ_QUEUE_ERROR;
+ ret = BLK_STS_IOERR;
spin_unlock_irq(&nvmeq->q_lock);
goto out_cleanup_iod;
}
__nvme_submit_cmd(nvmeq, &cmnd);
nvme_process_cq(nvmeq);
spin_unlock_irq(&nvmeq->q_lock);
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
out_cleanup_iod:
nvme_free_iod(dev, req);
out_free_cmd:
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 28bd255..58d311e 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1448,7 +1448,7 @@ static inline bool nvme_rdma_queue_is_ready(struct nvme_rdma_queue *queue,
return true;
}
-static int nvme_rdma_queue_rq(struct blk_mq_hw_ctx *hctx,
+static blk_status_t nvme_rdma_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
struct nvme_ns *ns = hctx->queue->queuedata;
@@ -1459,27 +1459,28 @@ static int nvme_rdma_queue_rq(struct blk_mq_hw_ctx *hctx,
struct nvme_command *c = sqe->data;
bool flush = false;
struct ib_device *dev;
- int ret;
+ blk_status_t ret;
+ int err;
WARN_ON_ONCE(rq->tag < 0);
if (!nvme_rdma_queue_is_ready(queue, rq))
- return BLK_MQ_RQ_QUEUE_BUSY;
+ return BLK_STS_RESOURCE;
dev = queue->device->dev;
ib_dma_sync_single_for_cpu(dev, sqe->dma,
sizeof(struct nvme_command), DMA_TO_DEVICE);
ret = nvme_setup_cmd(ns, rq, c);
- if (ret != BLK_MQ_RQ_QUEUE_OK)
+ if (ret)
return ret;
blk_mq_start_request(rq);
- ret = nvme_rdma_map_data(queue, rq, c);
- if (ret < 0) {
+ err = nvme_rdma_map_data(queue, rq, c);
+ if (err < 0) {
dev_err(queue->ctrl->ctrl.device,
- "Failed to map data (%d)\n", ret);
+ "Failed to map data (%d)\n", err);
nvme_cleanup_cmd(rq);
goto err;
}
@@ -1489,17 +1490,18 @@ static int nvme_rdma_queue_rq(struct blk_mq_hw_ctx *hctx,
if (req_op(rq) == REQ_OP_FLUSH)
flush = true;
- ret = nvme_rdma_post_send(queue, sqe, req->sge, req->num_sge,
+ err = nvme_rdma_post_send(queue, sqe, req->sge, req->num_sge,
req->mr->need_inval ? &req->reg_wr.wr : NULL, flush);
- if (ret) {
+ if (err) {
nvme_rdma_unmap_data(queue, rq);
goto err;
}
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
err:
- return (ret == -ENOMEM || ret == -EAGAIN) ?
- BLK_MQ_RQ_QUEUE_BUSY : BLK_MQ_RQ_QUEUE_ERROR;
+ if (err == -ENOMEM || err == -EAGAIN)
+ return BLK_STS_RESOURCE;
+ return BLK_STS_IOERR;
}
static int nvme_rdma_poll(struct blk_mq_hw_ctx *hctx, unsigned int tag)
diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c
index e503cff..db8ebad 100644
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c
@@ -159,17 +159,17 @@ nvme_loop_timeout(struct request *rq, bool reserved)
return BLK_EH_HANDLED;
}
-static int nvme_loop_queue_rq(struct blk_mq_hw_ctx *hctx,
+static blk_status_t nvme_loop_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
struct nvme_ns *ns = hctx->queue->queuedata;
struct nvme_loop_queue *queue = hctx->driver_data;
struct request *req = bd->rq;
struct nvme_loop_iod *iod = blk_mq_rq_to_pdu(req);
- int ret;
+ blk_status_t ret;
ret = nvme_setup_cmd(ns, req, &iod->cmd);
- if (ret != BLK_MQ_RQ_QUEUE_OK)
+ if (ret)
return ret;
iod->cmd.common.flags |= NVME_CMD_SGL_METABUF;
@@ -179,16 +179,15 @@ static int nvme_loop_queue_rq(struct blk_mq_hw_ctx *hctx,
nvme_cleanup_cmd(req);
blk_mq_start_request(req);
nvme_loop_queue_response(&iod->req);
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
}
if (blk_rq_bytes(req)) {
iod->sg_table.sgl = iod->first_sgl;
- ret = sg_alloc_table_chained(&iod->sg_table,
+ if (sg_alloc_table_chained(&iod->sg_table,
blk_rq_nr_phys_segments(req),
- iod->sg_table.sgl);
- if (ret)
- return BLK_MQ_RQ_QUEUE_BUSY;
+ iod->sg_table.sgl))
+ return BLK_STS_RESOURCE;
iod->req.sg = iod->sg_table.sgl;
iod->req.sg_cnt = blk_rq_map_sg(req->q, req, iod->sg_table.sgl);
@@ -197,7 +196,7 @@ static int nvme_loop_queue_rq(struct blk_mq_hw_ctx *hctx,
blk_mq_start_request(req);
schedule_work(&iod->work);
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
}
static void nvme_loop_submit_async_event(struct nvme_ctrl *arg, int aer_idx)
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 67a6719..b5f310b9 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1812,15 +1812,15 @@ static void scsi_request_fn(struct request_queue *q)
blk_delay_queue(q, SCSI_QUEUE_DELAY);
}
-static inline int prep_to_mq(int ret)
+static inline blk_status_t prep_to_mq(int ret)
{
switch (ret) {
case BLKPREP_OK:
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
case BLKPREP_DEFER:
- return BLK_MQ_RQ_QUEUE_BUSY;
+ return BLK_STS_RESOURCE;
default:
- return BLK_MQ_RQ_QUEUE_ERROR;
+ return BLK_STS_IOERR;
}
}
@@ -1892,7 +1892,7 @@ static void scsi_mq_done(struct scsi_cmnd *cmd)
blk_mq_complete_request(cmd->request);
}
-static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
+static blk_status_t scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
struct request *req = bd->rq;
@@ -1900,14 +1900,14 @@ static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
struct scsi_device *sdev = q->queuedata;
struct Scsi_Host *shost = sdev->host;
struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(req);
- int ret;
+ blk_status_t ret;
int reason;
ret = prep_to_mq(scsi_prep_state_check(sdev, req));
- if (ret != BLK_MQ_RQ_QUEUE_OK)
+ if (ret != BLK_STS_OK)
goto out;
- ret = BLK_MQ_RQ_QUEUE_BUSY;
+ ret = BLK_STS_RESOURCE;
if (!get_device(&sdev->sdev_gendev))
goto out;
@@ -1920,7 +1920,7 @@ static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
if (!(req->rq_flags & RQF_DONTPREP)) {
ret = prep_to_mq(scsi_mq_prep_fn(req));
- if (ret != BLK_MQ_RQ_QUEUE_OK)
+ if (ret != BLK_STS_OK)
goto out_dec_host_busy;
req->rq_flags |= RQF_DONTPREP;
} else {
@@ -1938,11 +1938,11 @@ static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
reason = scsi_dispatch_cmd(cmd);
if (reason) {
scsi_set_blocked(cmd, reason);
- ret = BLK_MQ_RQ_QUEUE_BUSY;
+ ret = BLK_STS_RESOURCE;
goto out_dec_host_busy;
}
- return BLK_MQ_RQ_QUEUE_OK;
+ return BLK_STS_OK;
out_dec_host_busy:
atomic_dec(&shost->host_busy);
@@ -1955,12 +1955,14 @@ static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
put_device(&sdev->sdev_gendev);
out:
switch (ret) {
- case BLK_MQ_RQ_QUEUE_BUSY:
+ case BLK_STS_OK:
+ break;
+ case BLK_STS_RESOURCE:
if (atomic_read(&sdev->device_busy) == 0 &&
!scsi_device_blocked(sdev))
blk_mq_delay_run_hw_queue(hctx, SCSI_QUEUE_DELAY);
break;
- case BLK_MQ_RQ_QUEUE_ERROR:
+ default:
/*
* Make sure to release all allocated ressources when
* we hit an error, as we will never see this command
@@ -1969,8 +1971,6 @@ static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
if (req->rq_flags & RQF_DONTPREP)
scsi_mq_uninit_cmd(cmd);
break;
- default:
- break;
}
return ret;
}
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 0cf6735..b144b7b 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -87,7 +87,8 @@ struct blk_mq_queue_data {
bool last;
};
-typedef int (queue_rq_fn)(struct blk_mq_hw_ctx *, const struct blk_mq_queue_data *);
+typedef blk_status_t (queue_rq_fn)(struct blk_mq_hw_ctx *,
+ const struct blk_mq_queue_data *);
typedef enum blk_eh_timer_return (timeout_fn)(struct request *, bool);
typedef int (init_hctx_fn)(struct blk_mq_hw_ctx *, void *, unsigned int);
typedef void (exit_hctx_fn)(struct blk_mq_hw_ctx *, unsigned int);
@@ -155,10 +156,6 @@ struct blk_mq_ops {
};
enum {
- BLK_MQ_RQ_QUEUE_OK = 0, /* queued fine */
- BLK_MQ_RQ_QUEUE_BUSY = 1, /* requeue IO for later */
- BLK_MQ_RQ_QUEUE_ERROR = 2, /* end IO with error */
-
BLK_MQ_F_SHOULD_MERGE = 1 << 0,
BLK_MQ_F_TAG_SHARED = 1 << 1,
BLK_MQ_F_SG_MERGE = 1 << 2,
