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vhost: encapsulate synchronous event ctx within the generic vhost layer

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The context had to be previously carried around by
particular vhost backend code and now it's embedded
inside the generic vsession struct. This serves mostly
as a cleanup.

Change-Id: I7b6ac2c3cb5d60a035d56affbf42fe5d4697f0f6
Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/448223
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
This commit is contained in:
Darek Stojaczyk 2019-03-17 00:00:57 +01:00 committed by Jim Harris
parent 880b8b8af3
commit 3b760a4d09
5 changed files with 24 additions and 23 deletions
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9
lib/vhost/vhost.c
View File

@ -865,9 +865,9 @@ spdk_vhost_allocate_reactor(struct spdk_cpuset *cpumask)
}
void
spdk_vhost_session_event_done(void *event_ctx, int response)
spdk_vhost_session_event_done(struct spdk_vhost_session *vsession, int response)
{
struct spdk_vhost_session_fn_ctx *ctx = event_ctx;
struct spdk_vhost_session_fn_ctx *ctx = vsession->event_ctx;
ctx->response = response;
sem_post(&ctx->sem);
@ -880,7 +880,7 @@ spdk_vhost_event_cb(void *arg1, void *arg2)
struct spdk_vhost_session *vsession;
vsession = spdk_vhost_session_find_by_id(ctx->vdev, ctx->vsession_id);
ctx->cb_fn(ctx->vdev, vsession, ctx);
ctx->cb_fn(ctx->vdev, vsession, NULL);
}
static void spdk_vhost_external_event_foreach_continue(struct spdk_vhost_dev *vdev,
@ -957,6 +957,8 @@ spdk_vhost_session_send_event(struct spdk_vhost_session *vsession,
ev_ctx.vdev = vsession->vdev;
ev_ctx.vsession_id = vsession->id;
ev_ctx.cb_fn = cb_fn;
vsession->event_ctx = &ev_ctx;
ev = spdk_event_allocate(vsession->lcore, spdk_vhost_event_cb, &ev_ctx, NULL);
assert(ev);
spdk_event_call(ev);
@ -973,6 +975,7 @@ spdk_vhost_session_send_event(struct spdk_vhost_session *vsession,
sem_destroy(&ev_ctx.sem);
pthread_mutex_lock(&g_spdk_vhost_mutex);
vsession->event_ctx = NULL;
return ev_ctx.response;
}

11
lib/vhost/vhost_blk.c
View File

@ -674,7 +674,7 @@ alloc_task_pool(struct spdk_vhost_blk_session *bvsession)
static int
spdk_vhost_blk_start_cb(struct spdk_vhost_dev *vdev,
struct spdk_vhost_session *vsession, void *event_ctx)
struct spdk_vhost_session *vsession, void *unused)
{
struct spdk_vhost_blk_dev *bvdev;
struct spdk_vhost_blk_session *bvsession;
@ -721,7 +721,7 @@ spdk_vhost_blk_start_cb(struct spdk_vhost_dev *vdev,
SPDK_INFOLOG(SPDK_LOG_VHOST, "Started poller for vhost controller %s on lcore %d\n",
vdev->name, vsession->lcore);
out:
spdk_vhost_session_event_done(event_ctx, rc);
spdk_vhost_session_event_done(vsession, rc);
return rc;
}
@ -767,14 +767,14 @@ destroy_session_poller_cb(void *arg)
free_task_pool(bvsession);
spdk_poller_unregister(&bvsession->destroy_ctx.poller);
spdk_vhost_session_event_done(bvsession->destroy_ctx.event_ctx, 0);
spdk_vhost_session_event_done(vsession, 0);
return -1;
}
static int
spdk_vhost_blk_stop_cb(struct spdk_vhost_dev *vdev,
struct spdk_vhost_session *vsession, void *event_ctx)
struct spdk_vhost_session *vsession, void *unused)
{
struct spdk_vhost_blk_session *bvsession;
@ -784,14 +784,13 @@ spdk_vhost_blk_stop_cb(struct spdk_vhost_dev *vdev,
goto err;
}
bvsession->destroy_ctx.event_ctx = event_ctx;
spdk_poller_unregister(&bvsession->requestq_poller);
bvsession->destroy_ctx.poller = spdk_poller_register(destroy_session_poller_cb,
bvsession, 1000);
return 0;
err:
spdk_vhost_session_event_done(event_ctx, -1);
spdk_vhost_session_event_done(vsession, -1);
return -1;
}

9
lib/vhost/vhost_internal.h
View File

@ -150,6 +150,8 @@ struct spdk_vhost_session {
struct spdk_vhost_virtqueue virtqueue[SPDK_VHOST_MAX_VQUEUES];
TAILQ_ENTRY(spdk_vhost_session) tailq;
struct spdk_vhost_session_fn_ctx *event_ctx;
};
struct spdk_vhost_dev {
@ -184,7 +186,6 @@ struct spdk_vhost_dev {
struct spdk_vhost_dev_destroy_ctx {
struct spdk_poller *poller;
void *event_ctx;
};
/**
@ -331,7 +332,7 @@ void spdk_vhost_dev_foreach_session(struct spdk_vhost_dev *dev,
*
* \param vsession vhost session
* \param cb_fn the function to call. The void *arg parameter in cb_fn
* must be passed to spdk_vhost_session_event_done().
* is always NULL.
* \param timeout_sec timeout in seconds. This function will still
* block after the timeout expires, but will print the provided errmsg.
* \param errmsg error message to print once the timeout expires
@ -343,10 +344,10 @@ int spdk_vhost_session_send_event(struct spdk_vhost_session *vsession,
/**
* Finish a blocking spdk_vhost_session_send_event() call.
*
* \param event_ctx event context
* \param vsession vhost session
* \param response return code
*/
void spdk_vhost_session_event_done(void *event_ctx, int response);
void spdk_vhost_session_event_done(struct spdk_vhost_session *vsession, int response);
struct spdk_vhost_session *spdk_vhost_session_find_by_vid(int vid);
void spdk_vhost_session_install_rte_compat_hooks(struct spdk_vhost_session *vsession);

9
lib/vhost/vhost_nvme.c
View File

@ -1076,7 +1076,7 @@ alloc_task_pool(struct spdk_vhost_nvme_dev *nvme)
static int
spdk_vhost_nvme_start_cb(struct spdk_vhost_dev *vdev,
struct spdk_vhost_session *vsession, void *event_ctx)
struct spdk_vhost_session *vsession, void *unused)
{
struct spdk_vhost_nvme_dev *nvme = to_nvme_dev(vdev);
struct spdk_vhost_nvme_ns *ns_dev;
@ -1105,7 +1105,7 @@ spdk_vhost_nvme_start_cb(struct spdk_vhost_dev *vdev,
/* Start the NVMe Poller */
nvme->requestq_poller = spdk_poller_register(nvme_worker, nvme, 0);
spdk_vhost_session_event_done(event_ctx, 0);
spdk_vhost_session_event_done(vsession, 0);
return 0;
}
@ -1184,14 +1184,14 @@ destroy_device_poller_cb(void *arg)
}
spdk_poller_unregister(&nvme->destroy_ctx.poller);
spdk_vhost_session_event_done(nvme->destroy_ctx.event_ctx, 0);
spdk_vhost_session_event_done(nvme->vsession, 0);
return -1;
}
static int
spdk_vhost_nvme_stop_cb(struct spdk_vhost_dev *vdev,
struct spdk_vhost_session *vsession, void *event_ctx)
struct spdk_vhost_session *vsession, void *unused)
{
struct spdk_vhost_nvme_dev *nvme = to_nvme_dev(vdev);
@ -1202,7 +1202,6 @@ spdk_vhost_nvme_stop_cb(struct spdk_vhost_dev *vdev,
free_task_pool(nvme);
SPDK_NOTICELOG("Stopping Device %u, Path %s\n", vsession->vid, vdev->path);
nvme->destroy_ctx.event_ctx = event_ctx;
spdk_poller_unregister(&nvme->requestq_poller);
nvme->destroy_ctx.poller = spdk_poller_register(destroy_device_poller_cb, nvme, 1000);

9
lib/vhost/vhost_scsi.c
View File

@ -1258,7 +1258,7 @@ alloc_task_pool(struct spdk_vhost_scsi_session *svsession)
static int
spdk_vhost_scsi_start_cb(struct spdk_vhost_dev *vdev,
struct spdk_vhost_session *vsession, void *event_ctx)
struct spdk_vhost_session *vsession, void *unused)
{
struct spdk_vhost_scsi_dev *svdev;
struct spdk_vhost_scsi_session *svsession;
@ -1313,7 +1313,7 @@ spdk_vhost_scsi_start_cb(struct spdk_vhost_dev *vdev,
MGMT_POLL_PERIOD_US);
}
out:
spdk_vhost_session_event_done(event_ctx, rc);
spdk_vhost_session_event_done(vsession, rc);
return rc;
}
@ -1383,20 +1383,19 @@ destroy_session_poller_cb(void *arg)
free_task_pool(svsession);
spdk_poller_unregister(&svsession->destroy_ctx.poller);
spdk_vhost_session_event_done(svsession->destroy_ctx.event_ctx, 0);
spdk_vhost_session_event_done(vsession, 0);
return -1;
}
static int
spdk_vhost_scsi_stop_cb(struct spdk_vhost_dev *vdev,
struct spdk_vhost_session *vsession, void *event_ctx)
struct spdk_vhost_session *vsession, void *unused)
{
struct spdk_vhost_scsi_session *svsession;
svsession = to_scsi_session(vsession);
assert(svsession != NULL);
svsession->destroy_ctx.event_ctx = event_ctx;
spdk_poller_unregister(&svsession->requestq_poller);
spdk_poller_unregister(&svsession->mgmt_poller);
svsession->destroy_ctx.poller = spdk_poller_register(destroy_session_poller_cb,