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vhost/blk: make process_blk_request() only process virtio_blk request

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Previously the function also get the payload from vring descriptors,
this mixed the process of vring and virtio_blk together, now it's
only related with virtio_blk.

Also this make the resubmission process more clear.

Change-Id: I6dd17cf9e30dde99e50a7c6d345b6eee7fa5b758
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/5754
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: JinYu <jin.yu@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
This commit is contained in:
Changpeng Liu 2021-01-04 21:22:19 +08:00 committed by Tomasz Zawadzki
parent 6fdc71ec18
commit 99c62dda60
1 changed files with 26 additions and 24 deletions
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50
lib/vhost/vhost_blk.c
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@ -84,6 +84,9 @@ struct spdk_vhost_blk_task {
uint32_t used_len;
uint16_t iovcnt;
struct iovec iovs[SPDK_VHOST_IOVS_MAX];
/** Size of whole payload in bytes */
uint32_t payload_size;
};
struct spdk_vhost_blk_dev {
@ -109,8 +112,7 @@ static const struct spdk_vhost_dev_backend vhost_blk_device_backend;
static int
process_blk_request(struct spdk_vhost_blk_task *task,
struct spdk_vhost_blk_session *bvsession,
struct spdk_vhost_virtqueue *vq);
struct spdk_vhost_blk_session *bvsession);
static struct spdk_vhost_blk_session *
to_blk_session(struct spdk_vhost_session *vsession)
@ -134,6 +136,7 @@ blk_task_init(struct spdk_vhost_blk_task *task)
task->iovcnt = SPDK_COUNTOF(task->iovs);
task->status = NULL;
task->used_len = 0;
task->payload_size = 0;
}
static void
@ -334,9 +337,7 @@ blk_request_resubmit(void *arg)
struct spdk_vhost_blk_task *task = (struct spdk_vhost_blk_task *)arg;
int rc = 0;
blk_task_init(task);
rc = process_blk_request(task, task->bvsession, task->vq);
rc = process_blk_request(task, task->bvsession);
if (rc == 0) {
SPDK_DEBUGLOG(vhost_blk, "====== Task %p resubmitted ======\n", task);
} else {
@ -364,33 +365,17 @@ blk_request_queue_io(struct spdk_vhost_blk_task *task)
static int
process_blk_request(struct spdk_vhost_blk_task *task,
struct spdk_vhost_blk_session *bvsession,
struct spdk_vhost_virtqueue *vq)
struct spdk_vhost_blk_session *bvsession)
{
struct spdk_vhost_blk_dev *bvdev = bvsession->bvdev;
const struct virtio_blk_outhdr *req;
struct virtio_blk_discard_write_zeroes *desc;
struct iovec *iov;
uint32_t type;
uint32_t payload_len;
uint64_t flush_bytes;
uint32_t payload_len;
int rc;
if (vq->packed.packed_ring) {
rc = blk_iovs_packed_queue_setup(bvsession, vq, task->req_idx, task->iovs, &task->iovcnt,
&payload_len);
} else {
rc = blk_iovs_split_queue_setup(bvsession, vq, task->req_idx, task->iovs, &task->iovcnt,
&payload_len);
}
if (rc) {
SPDK_DEBUGLOG(vhost_blk, "Invalid request (req_idx = %"PRIu16").\n", task->req_idx);
/* Only READ and WRITE are supported for now. */
invalid_blk_request(task, VIRTIO_BLK_S_UNSUPP);
return -1;
}
iov = &task->iovs[0];
if (spdk_unlikely(iov->iov_len != sizeof(*req))) {
SPDK_DEBUGLOG(vhost_blk,
@ -411,6 +396,7 @@ process_blk_request(struct spdk_vhost_blk_task *task,
return -1;
}
payload_len = task->payload_size;
task->status = iov->iov_base;
payload_len -= sizeof(*req) + sizeof(*task->status);
task->iovcnt -= 2;
@ -557,6 +543,7 @@ process_blk_task(struct spdk_vhost_virtqueue *vq, uint16_t req_idx)
{
struct spdk_vhost_blk_task *task;
uint16_t task_idx = req_idx, num_descs;
int rc;
if (vq->packed.packed_ring) {
/* Packed ring used the buffer_id as the task_idx to get task struct.
@ -598,7 +585,22 @@ process_blk_task(struct spdk_vhost_virtqueue *vq, uint16_t req_idx)
blk_task_init(task);
if (process_blk_request(task, task->bvsession, vq) == 0) {
if (vq->packed.packed_ring) {
rc = blk_iovs_packed_queue_setup(task->bvsession, vq, task->req_idx, task->iovs, &task->iovcnt,
&task->payload_size);
} else {
rc = blk_iovs_split_queue_setup(task->bvsession, vq, task->req_idx, task->iovs, &task->iovcnt,
&task->payload_size);
}
if (rc) {
SPDK_DEBUGLOG(vhost_blk, "Invalid request (req_idx = %"PRIu16").\n", task->req_idx);
/* Only READ and WRITE are supported for now. */
invalid_blk_request(task, VIRTIO_BLK_S_UNSUPP);
return;
}
if (process_blk_request(task, task->bvsession) == 0) {
SPDK_DEBUGLOG(vhost_blk, "====== Task %p req_idx %d submitted ======\n", task,
task_idx);
} else {