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vhost_blk: separate out generic virtio_blk request processing

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This patch adds process_virtio_blk_request() that will be called
by virtio_blk transports to process incoming requests.

Meanwhile vhost_user_blk_request_finish() will be replaced with
a callback to the virtio_blk transport to notify of the result.

blk_request_finish() should only be called as direct result of
process_virtio_blk_request(), usually from it.
Some error paths now call vhost_user_blk_request_finish() directly,
if vhost_user_process_blk_request() was not called yet.

Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Change-Id: I0cce22f15b922fe45f30fb659c384b6e836def4c
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9537
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
This commit is contained in:
Tomasz Zawadzki 2021-09-17 10:47:53 +02:00
parent 8c609f29bc
commit eef6af95d1
1 changed files with 21 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
lib/vhost/vhost_blk.c
View File

@ -110,8 +110,8 @@ static const struct spdk_json_object_decoder rpc_construct_vhost_blk[] = {
static const struct spdk_vhost_dev_backend vhost_blk_device_backend;
static int
process_blk_request(struct spdk_vhost_dev *vdev, struct spdk_io_channel *ch,
struct spdk_vhost_blk_task *task);
virtio_blk_process_request(struct spdk_vhost_dev *vdev, struct spdk_io_channel *ch,
struct spdk_vhost_blk_task *task);
static int
vhost_user_process_blk_request(struct spdk_vhost_user_blk_task *user_task)
@ -119,7 +119,7 @@ vhost_user_process_blk_request(struct spdk_vhost_user_blk_task *user_task)
struct spdk_vhost_blk_session *bvsession = user_task->bvsession;
struct spdk_vhost_dev *vdev = &bvsession->bvdev->vdev;
return process_blk_request(vdev, bvsession->io_channel, &user_task->blk_task);
return virtio_blk_process_request(vdev, bvsession->io_channel, &user_task->blk_task);
}
static struct spdk_vhost_blk_dev *
@ -179,14 +179,10 @@ blk_task_enqueue(struct spdk_vhost_user_blk_task *task)
}
static void
blk_request_finish(uint8_t status, struct spdk_vhost_blk_task *task)
vhost_user_blk_request_finish(uint8_t status, struct spdk_vhost_blk_task *task)
{
struct spdk_vhost_user_blk_task *user_task;
if (task->status) {
*task->status = status;
}
user_task = SPDK_CONTAINEROF(task, struct spdk_vhost_user_blk_task, blk_task);
blk_task_enqueue(user_task);
@ -196,6 +192,17 @@ blk_request_finish(uint8_t status, struct spdk_vhost_blk_task *task)
blk_task_finish(user_task);
}
static void
blk_request_finish(uint8_t status, struct spdk_vhost_blk_task *task)
{
if (task->status) {
*task->status = status;
}
vhost_user_blk_request_finish(status, task);
}
/*
* Process task's descriptor chain and setup data related fields.
* Return
@ -440,7 +447,7 @@ blk_request_resubmit(void *arg)
struct spdk_vhost_blk_task *task = arg;
int rc = 0;
rc = process_blk_request(task->bdev_io_wait_vdev, task->bdev_io_wait_ch, task);
rc = virtio_blk_process_request(task->bdev_io_wait_vdev, task->bdev_io_wait_ch, task);
if (rc == 0) {
SPDK_DEBUGLOG(vhost_blk, "====== Task %p resubmitted ======\n", task);
} else {
@ -468,8 +475,8 @@ blk_request_queue_io(struct spdk_vhost_dev *vdev, struct spdk_io_channel *ch,
}
static int
process_blk_request(struct spdk_vhost_dev *vdev, struct spdk_io_channel *ch,
struct spdk_vhost_blk_task *task)
virtio_blk_process_request(struct spdk_vhost_dev *vdev, struct spdk_io_channel *ch,
struct spdk_vhost_blk_task *task)
{
struct spdk_vhost_blk_dev *bvdev = to_blk_dev(vdev);
struct virtio_blk_outhdr req;
@ -676,7 +683,7 @@ process_blk_task(struct spdk_vhost_virtqueue *vq, uint16_t req_idx)
if (rc) {
SPDK_DEBUGLOG(vhost_blk, "Invalid request (req_idx = %"PRIu16").\n", task->req_idx);
/* Only READ and WRITE are supported for now. */
blk_request_finish(VIRTIO_BLK_S_UNSUPP, blk_task);
vhost_user_blk_request_finish(VIRTIO_BLK_S_UNSUPP, blk_task);
return;
}
@ -741,7 +748,7 @@ process_packed_blk_task(struct spdk_vhost_virtqueue *vq, uint16_t req_idx)
if (rc) {
SPDK_DEBUGLOG(vhost_blk, "Invalid request (req_idx = %"PRIu16").\n", task->req_idx);
/* Only READ and WRITE are supported for now. */
blk_request_finish(VIRTIO_BLK_S_UNSUPP, blk_task);
vhost_user_blk_request_finish(VIRTIO_BLK_S_UNSUPP, blk_task);
return;
}
@ -802,7 +809,7 @@ process_packed_inflight_blk_task(struct spdk_vhost_virtqueue *vq,
if (rc) {
SPDK_DEBUGLOG(vhost_blk, "Invalid request (req_idx = %"PRIu16").\n", task->req_idx);
/* Only READ and WRITE are supported for now. */
blk_request_finish(VIRTIO_BLK_S_UNSUPP, blk_task);
vhost_user_blk_request_finish(VIRTIO_BLK_S_UNSUPP, blk_task);
return;
}