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vhost/blk: add per-session io_channel

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Different Vhost Block sessions could be technically
polled on different threads, so we move the io_channel
from the device struct into the session struct.

Change-Id: I004cad8b6dc6d198844fca3bb11724e3f176dc9d
Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/c/439315
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Pawel Wodkowski <pawelx.wodkowski@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
This commit is contained in:
Darek Stojaczyk 2019-01-07 00:15:16 +01:00
parent bd7b05e419
commit 1ccd66db41
1 changed files with 16 additions and 18 deletions
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34
lib/vhost/vhost_blk.c
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@ -69,7 +69,6 @@ struct spdk_vhost_blk_dev {
struct spdk_vhost_dev vdev;
struct spdk_bdev *bdev;
struct spdk_bdev_desc *bdev_desc;
struct spdk_io_channel *bdev_io_channel;
bool readonly;
};
@ -78,6 +77,7 @@ struct spdk_vhost_blk_session {
struct spdk_vhost_session vsession;
struct spdk_vhost_blk_dev *bvdev;
struct spdk_poller *requestq_poller;
struct spdk_io_channel *io_channel;
struct spdk_vhost_dev_destroy_ctx destroy_ctx;
};
@ -217,14 +217,14 @@ static inline void
blk_request_queue_io(struct spdk_vhost_blk_task *task)
{
int rc;
struct spdk_vhost_blk_dev *bvdev = task->bvsession->bvdev;
struct spdk_bdev *bdev = bvdev->bdev;
struct spdk_vhost_blk_session *bvsession = task->bvsession;
struct spdk_bdev *bdev = bvsession->bvdev->bdev;
task->bdev_io_wait.bdev = bdev;
task->bdev_io_wait.cb_fn = blk_request_resubmit;
task->bdev_io_wait.cb_arg = task;
rc = spdk_bdev_queue_io_wait(bdev, bvdev->bdev_io_channel, &task->bdev_io_wait);
rc = spdk_bdev_queue_io_wait(bdev, bvsession->io_channel, &task->bdev_io_wait);
if (rc != 0) {
SPDK_ERRLOG("Queue io failed in vhost_blk, rc=%d\n", rc);
invalid_blk_request(task, VIRTIO_BLK_S_IOERR);
@ -293,12 +293,12 @@ process_blk_request(struct spdk_vhost_blk_task *task,
if (type == VIRTIO_BLK_T_IN) {
task->used_len = payload_len + sizeof(*task->status);
rc = spdk_bdev_readv(bvdev->bdev_desc, bvdev->bdev_io_channel,
rc = spdk_bdev_readv(bvdev->bdev_desc, bvsession->io_channel,
&task->iovs[1], task->iovcnt, req->sector * 512,
payload_len, blk_request_complete_cb, task);
} else if (!bvdev->readonly) {
task->used_len = sizeof(*task->status);
rc = spdk_bdev_writev(bvdev->bdev_desc, bvdev->bdev_io_channel,
rc = spdk_bdev_writev(bvdev->bdev_desc, bvsession->io_channel,
&task->iovs[1], task->iovcnt, req->sector * 512,
payload_len, blk_request_complete_cb, task);
} else {
@ -324,7 +324,7 @@ process_blk_request(struct spdk_vhost_blk_task *task,
return -1;
}
rc = spdk_bdev_unmap(bvdev->bdev_desc, bvdev->bdev_io_channel,
rc = spdk_bdev_unmap(bvdev->bdev_desc, bvsession->io_channel,
desc->sector * 512, desc->num_sectors * 512,
blk_request_complete_cb, task);
if (rc) {
@ -352,7 +352,7 @@ process_blk_request(struct spdk_vhost_blk_task *task,
return -1;
}
rc = spdk_bdev_write_zeroes(bvdev->bdev_desc, bvdev->bdev_io_channel,
rc = spdk_bdev_write_zeroes(bvdev->bdev_desc, bvsession->io_channel,
desc->sector * 512, desc->num_sectors * 512,
blk_request_complete_cb, task);
if (rc) {
@ -478,7 +478,6 @@ no_bdev_vdev_worker(void *arg)
{
struct spdk_vhost_blk_session *bvsession = arg;
struct spdk_vhost_session *vsession = &bvsession->vsession;
struct spdk_vhost_blk_dev *bvdev = bvsession->bvdev;
uint16_t q_idx;
for (q_idx = 0; q_idx < vsession->max_queues; q_idx++) {
@ -487,9 +486,9 @@ no_bdev_vdev_worker(void *arg)
spdk_vhost_session_used_signal(vsession);
if (vsession->task_cnt == 0 && bvdev->bdev_io_channel) {
spdk_put_io_channel(bvdev->bdev_io_channel);
bvdev->bdev_io_channel = NULL;
if (vsession->task_cnt == 0 && bvsession->io_channel) {
spdk_put_io_channel(bvsession->io_channel);
bvsession->io_channel = NULL;
}
return -1;
@ -663,8 +662,8 @@ spdk_vhost_blk_start(struct spdk_vhost_dev *vdev, void *event_ctx)
}
if (bvdev->bdev) {
bvdev->bdev_io_channel = spdk_bdev_get_io_channel(bvdev->bdev_desc);
if (!bvdev->bdev_io_channel) {
bvsession->io_channel = spdk_bdev_get_io_channel(bvdev->bdev_desc);
if (!bvsession->io_channel) {
free_task_pool(bvsession);
SPDK_ERRLOG("Controller %s: IO channel allocation failed\n", vdev->name);
rc = -1;
@ -685,7 +684,6 @@ static int
destroy_session_poller_cb(void *arg)
{
struct spdk_vhost_blk_session *bvsession = arg;
struct spdk_vhost_blk_dev *bvdev = bvsession->bvdev;
struct spdk_vhost_session *vsession = &bvsession->vsession;
int i;
@ -700,9 +698,9 @@ destroy_session_poller_cb(void *arg)
SPDK_INFOLOG(SPDK_LOG_VHOST, "Stopping poller for vhost controller %s\n", vsession->vdev->name);
if (bvdev->bdev_io_channel) {
spdk_put_io_channel(bvdev->bdev_io_channel);
bvdev->bdev_io_channel = NULL;
if (bvsession->io_channel) {
spdk_put_io_channel(bvsession->io_channel);
bvsession->io_channel = NULL;
}
free_task_pool(bvsession);