#include "qemu/coroutine.h"
#include "qemu/timer.h"
-/* Right now, this mutex is only needed to synchronize accesses to job->busy
- * and job->sleep_timer, such as concurrent calls to block_job_do_yield and
- * block_job_enter. */
-static QemuMutex block_job_mutex;
-
-static void block_job_lock(void)
-{
- qemu_mutex_lock(&block_job_mutex);
-}
-
-static void block_job_unlock(void)
-{
- qemu_mutex_unlock(&block_job_mutex);
-}
-
-static void __attribute__((__constructor__)) block_job_init(void)
-{
- qemu_mutex_init(&block_job_mutex);
-}
-
-static void block_job_event_cancelled(BlockJob *job);
-static void block_job_event_completed(BlockJob *job, const char *msg);
-static int block_job_event_pending(BlockJob *job);
-static void block_job_enter_cond(BlockJob *job, bool(*fn)(BlockJob *job));
-
/* Transactional group of block jobs */
struct BlockJobTxn {
block_job_txn_ref(txn);
}
-static void block_job_txn_del_job(BlockJob *job)
+void block_job_txn_del_job(BlockJob *job)
{
if (job->txn) {
QLIST_REMOVE(job, txn_list);
}
}
-/* Assumes the block_job_mutex is held */
-static bool block_job_timer_pending(BlockJob *job)
-{
- return timer_pending(&job->sleep_timer);
-}
-
-/* Assumes the block_job_mutex is held */
-static bool block_job_timer_not_pending(BlockJob *job)
-{
- return !block_job_timer_pending(job);
-}
-
-static void block_job_pause(BlockJob *job)
-{
- job->pause_count++;
-}
-
-static void block_job_resume(BlockJob *job)
-{
- assert(job->pause_count > 0);
- job->pause_count--;
- if (job->pause_count) {
- return;
- }
-
- /* kick only if no timer is pending */
- block_job_enter_cond(job, block_job_timer_not_pending);
-}
-
-void block_job_ref(BlockJob *job)
-{
- ++job->refcnt;
-}
-
static void block_job_attached_aio_context(AioContext *new_context,
void *opaque);
static void block_job_detach_aio_context(void *opaque);
-void block_job_unref(BlockJob *job)
+void block_job_free(Job *job)
{
- if (--job->refcnt == 0) {
- assert(job->job.status == JOB_STATUS_NULL);
- assert(!job->txn);
- BlockDriverState *bs = blk_bs(job->blk);
- bs->job = NULL;
- block_job_remove_all_bdrv(job);
- blk_remove_aio_context_notifier(job->blk,
- block_job_attached_aio_context,
- block_job_detach_aio_context, job);
- blk_unref(job->blk);
- error_free(job->blocker);
- assert(!timer_pending(&job->sleep_timer));
- job_delete(&job->job);
- }
+ BlockJob *bjob = container_of(job, BlockJob, job);
+ BlockDriverState *bs = blk_bs(bjob->blk);
+
+ assert(!bjob->txn);
+
+ bs->job = NULL;
+ block_job_remove_all_bdrv(bjob);
+ blk_remove_aio_context_notifier(bjob->blk,
+ block_job_attached_aio_context,
+ block_job_detach_aio_context, bjob);
+ blk_unref(bjob->blk);
+ error_free(bjob->blocker);
}
static void block_job_attached_aio_context(AioContext *new_context,
{
BlockJob *job = opaque;
+ job->job.aio_context = new_context;
if (job->driver->attached_aio_context) {
job->driver->attached_aio_context(job, new_context);
}
- block_job_resume(job);
+ job_resume(&job->job);
}
static void block_job_drain(BlockJob *job)
{
- /* If job is !job->busy this kicks it into the next pause point. */
+ /* If job is !job->job.busy this kicks it into the next pause point. */
block_job_enter(job);
blk_drain(job->blk);
BlockJob *job = opaque;
/* In case the job terminates during aio_poll()... */
- block_job_ref(job);
+ job_ref(&job->job);
- block_job_pause(job);
+ job_pause(&job->job);
- while (!job->paused && !job->completed) {
+ while (!job->job.paused && !job_is_completed(&job->job)) {
block_job_drain(job);
}
- block_job_unref(job);
+ job->job.aio_context = NULL;
+ job_unref(&job->job);
}
static char *child_job_get_parent_desc(BdrvChild *c)
static void child_job_drained_begin(BdrvChild *c)
{
BlockJob *job = c->opaque;
- block_job_pause(job);
+ job_pause(&job->job);
}
static void child_job_drained_end(BdrvChild *c)
{
BlockJob *job = c->opaque;
- block_job_resume(job);
+ job_resume(&job->job);
}
static const BdrvChildRole child_job = {
return (job->job.id == NULL);
}
-static bool block_job_started(BlockJob *job)
-{
- return job->co;
-}
-
const BlockJobDriver *block_job_driver(BlockJob *job)
{
return job->driver;
}
-/**
- * All jobs must allow a pause point before entering their job proper. This
- * ensures that jobs can be paused prior to being started, then resumed later.
- */
-static void coroutine_fn block_job_co_entry(void *opaque)
-{
- BlockJob *job = opaque;
-
- assert(job && job->driver && job->driver->start);
- block_job_pause_point(job);
- job->driver->start(job);
-}
-
-static void block_job_sleep_timer_cb(void *opaque)
-{
- BlockJob *job = opaque;
-
- block_job_enter(job);
-}
-
-void block_job_start(BlockJob *job)
-{
- assert(job && !block_job_started(job) && job->paused &&
- job->driver && job->driver->start);
- job->co = qemu_coroutine_create(block_job_co_entry, job);
- job->pause_count--;
- job->busy = true;
- job->paused = false;
- job_state_transition(&job->job, JOB_STATUS_RUNNING);
- bdrv_coroutine_enter(blk_bs(job->blk), job->co);
-}
-
-static void block_job_decommission(BlockJob *job)
-{
- assert(job);
- job->completed = true;
- job->busy = false;
- job->paused = false;
- job->deferred_to_main_loop = true;
- block_job_txn_del_job(job);
- job_state_transition(&job->job, JOB_STATUS_NULL);
- block_job_unref(job);
-}
-
-static void block_job_do_dismiss(BlockJob *job)
-{
- block_job_decommission(job);
-}
-
-static void block_job_conclude(BlockJob *job)
-{
- job_state_transition(&job->job, JOB_STATUS_CONCLUDED);
- if (job->auto_dismiss || !block_job_started(job)) {
- block_job_do_dismiss(job);
- }
-}
-
-static void block_job_update_rc(BlockJob *job)
-{
- if (!job->ret && block_job_is_cancelled(job)) {
- job->ret = -ECANCELED;
- }
- if (job->ret) {
- job_state_transition(&job->job, JOB_STATUS_ABORTING);
- }
-}
-
static int block_job_prepare(BlockJob *job)
{
- if (job->ret == 0 && job->driver->prepare) {
- job->ret = job->driver->prepare(job);
- }
- return job->ret;
-}
-
-static void block_job_commit(BlockJob *job)
-{
- assert(!job->ret);
- if (job->driver->commit) {
- job->driver->commit(job);
- }
-}
-
-static void block_job_abort(BlockJob *job)
-{
- assert(job->ret);
- if (job->driver->abort) {
- job->driver->abort(job);
- }
-}
-
-static void block_job_clean(BlockJob *job)
-{
- if (job->driver->clean) {
- job->driver->clean(job);
- }
-}
-
-static int block_job_finalize_single(BlockJob *job)
-{
- assert(job->completed);
-
- /* Ensure abort is called for late-transactional failures */
- block_job_update_rc(job);
-
- if (!job->ret) {
- block_job_commit(job);
- } else {
- block_job_abort(job);
- }
- block_job_clean(job);
-
- if (job->cb) {
- job->cb(job->opaque, job->ret);
+ if (job->job.ret == 0 && job->driver->prepare) {
+ job->job.ret = job->driver->prepare(job);
}
-
- /* Emit events only if we actually started */
- if (block_job_started(job)) {
- if (block_job_is_cancelled(job)) {
- block_job_event_cancelled(job);
- } else {
- const char *msg = NULL;
- if (job->ret < 0) {
- msg = strerror(-job->ret);
- }
- block_job_event_completed(job, msg);
- }
- }
-
- block_job_txn_del_job(job);
- block_job_conclude(job);
- return 0;
+ return job->job.ret;
}
-static void block_job_cancel_async(BlockJob *job, bool force)
+static void job_cancel_async(Job *job, bool force)
{
- if (job->iostatus != BLOCK_DEVICE_IO_STATUS_OK) {
- block_job_iostatus_reset(job);
- }
if (job->user_paused) {
- /* Do not call block_job_enter here, the caller will handle it. */
+ /* Do not call job_enter here, the caller will handle it. */
job->user_paused = false;
+ if (job->driver->user_resume) {
+ job->driver->user_resume(job);
+ }
+ assert(job->pause_count > 0);
job->pause_count--;
}
job->cancelled = true;
/* To prevent 'force == false' overriding a previous 'force == true' */
- job->force |= force;
+ job->force_cancel |= force;
}
static int block_job_txn_apply(BlockJobTxn *txn, int fn(BlockJob *), bool lock)
assert(blk_bs(job->blk)->job == job);
- block_job_ref(job);
+ job_ref(&job->job);
if (finish) {
finish(job, &local_err);
}
if (local_err) {
error_propagate(errp, local_err);
- block_job_unref(job);
+ job_unref(&job->job);
return -EBUSY;
}
/* block_job_drain calls block_job_enter, and it should be enough to
* induce progress until the job completes or moves to the main thread.
*/
- while (!job->deferred_to_main_loop && !job->completed) {
+ while (!job->job.deferred_to_main_loop && !job_is_completed(&job->job)) {
block_job_drain(job);
}
- while (!job->completed) {
+ while (!job_is_completed(&job->job)) {
aio_poll(qemu_get_aio_context(), true);
}
- ret = (job->cancelled && job->ret == 0) ? -ECANCELED : job->ret;
- block_job_unref(job);
+ ret = (job_is_cancelled(&job->job) && job->job.ret == 0)
+ ? -ECANCELED : job->job.ret;
+ job_unref(&job->job);
return ret;
}
* on the caller, so leave it. */
QLIST_FOREACH(other_job, &txn->jobs, txn_list) {
if (other_job != job) {
- block_job_cancel_async(other_job, false);
+ job_cancel_async(&other_job->job, false);
}
}
while (!QLIST_EMPTY(&txn->jobs)) {
other_job = QLIST_FIRST(&txn->jobs);
ctx = blk_get_aio_context(other_job->blk);
- if (!other_job->completed) {
- assert(other_job->cancelled);
+ if (!job_is_completed(&other_job->job)) {
+ assert(job_is_cancelled(&other_job->job));
block_job_finish_sync(other_job, NULL, NULL);
}
- block_job_finalize_single(other_job);
+ job_finalize_single(&other_job->job);
aio_context_release(ctx);
}
static int block_job_needs_finalize(BlockJob *job)
{
- return !job->auto_finalize;
+ return !job->job.auto_finalize;
+}
+
+static int block_job_finalize_single(BlockJob *job)
+{
+ return job_finalize_single(&job->job);
}
static void block_job_do_finalize(BlockJob *job)
}
}
+static int block_job_transition_to_pending(BlockJob *job)
+{
+ job_state_transition(&job->job, JOB_STATUS_PENDING);
+ if (!job->job.auto_finalize) {
+ job_event_pending(&job->job);
+ }
+ return 0;
+}
+
static void block_job_completed_txn_success(BlockJob *job)
{
BlockJobTxn *txn = job->txn;
* txn.
*/
QLIST_FOREACH(other_job, &txn->jobs, txn_list) {
- if (!other_job->completed) {
+ if (!job_is_completed(&other_job->job)) {
return;
}
- assert(other_job->ret == 0);
+ assert(other_job->job.ret == 0);
}
- block_job_txn_apply(txn, block_job_event_pending, false);
+ block_job_txn_apply(txn, block_job_transition_to_pending, false);
/* If no jobs need manual finalization, automatically do so */
if (block_job_txn_apply(txn, block_job_needs_finalize, false) == 0) {
}
}
+/* Assumes the job_mutex is held */
+static bool job_timer_pending(Job *job)
+{
+ return timer_pending(&job->sleep_timer);
+}
+
void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp)
{
int64_t old_speed = job->speed;
}
/* kick only if a timer is pending */
- block_job_enter_cond(job, block_job_timer_pending);
+ job_enter_cond(&job->job, job_timer_pending);
}
int64_t block_job_ratelimit_get_delay(BlockJob *job, uint64_t n)
if (job_apply_verb(&job->job, JOB_VERB_COMPLETE, errp)) {
return;
}
- if (job->pause_count || job->cancelled || !job->driver->complete) {
+ if (job->job.pause_count || job_is_cancelled(&job->job) ||
+ !job->driver->complete)
+ {
error_setg(errp, "The active block job '%s' cannot be completed",
job->job.id);
return;
return;
}
- block_job_do_dismiss(job);
+ job_do_dismiss(&job->job);
*jobptr = NULL;
}
-void block_job_user_pause(BlockJob *job, Error **errp)
-{
- if (job_apply_verb(&job->job, JOB_VERB_PAUSE, errp)) {
- return;
- }
- if (job->user_paused) {
- error_setg(errp, "Job is already paused");
- return;
- }
- job->user_paused = true;
- block_job_pause(job);
-}
-
-bool block_job_user_paused(BlockJob *job)
-{
- return job->user_paused;
-}
-
-void block_job_user_resume(BlockJob *job, Error **errp)
-{
- assert(job);
- if (!job->user_paused || job->pause_count <= 0) {
- error_setg(errp, "Can't resume a job that was not paused");
- return;
- }
- if (job_apply_verb(&job->job, JOB_VERB_RESUME, errp)) {
- return;
- }
- block_job_iostatus_reset(job);
- job->user_paused = false;
- block_job_resume(job);
-}
-
void block_job_cancel(BlockJob *job, bool force)
{
if (job->job.status == JOB_STATUS_CONCLUDED) {
- block_job_do_dismiss(job);
+ job_do_dismiss(&job->job);
return;
}
- block_job_cancel_async(job, force);
- if (!block_job_started(job)) {
+ job_cancel_async(&job->job, force);
+ if (!job_started(&job->job)) {
block_job_completed(job, -ECANCELED);
- } else if (job->deferred_to_main_loop) {
+ } else if (job->job.deferred_to_main_loop) {
block_job_completed_txn_abort(job);
} else {
block_job_enter(job);
info->type = g_strdup(job_type_str(&job->job));
info->device = g_strdup(job->job.id);
info->len = job->len;
- info->busy = atomic_read(&job->busy);
- info->paused = job->pause_count > 0;
+ info->busy = atomic_read(&job->job.busy);
+ info->paused = job->job.pause_count > 0;
info->offset = job->offset;
info->speed = job->speed;
info->io_status = job->iostatus;
info->ready = job->ready;
info->status = job->job.status;
- info->auto_finalize = job->auto_finalize;
- info->auto_dismiss = job->auto_dismiss;
- info->has_error = job->ret != 0;
- info->error = job->ret ? g_strdup(strerror(-job->ret)) : NULL;
+ info->auto_finalize = job->job.auto_finalize;
+ info->auto_dismiss = job->job.auto_dismiss;
+ info->has_error = job->job.ret != 0;
+ info->error = job->job.ret ? g_strdup(strerror(-job->job.ret)) : NULL;
return info;
}
}
}
-static void block_job_event_cancelled(BlockJob *job)
+static void block_job_event_cancelled(Notifier *n, void *opaque)
{
+ BlockJob *job = opaque;
+
if (block_job_is_internal(job)) {
return;
}
&error_abort);
}
-static void block_job_event_completed(BlockJob *job, const char *msg)
+static void block_job_event_completed(Notifier *n, void *opaque)
{
+ BlockJob *job = opaque;
+ const char *msg = NULL;
+
if (block_job_is_internal(job)) {
return;
}
+ if (job->job.ret < 0) {
+ msg = strerror(-job->job.ret);
+ }
+
qapi_event_send_block_job_completed(job_type(&job->job),
job->job.id,
job->len,
&error_abort);
}
-static int block_job_event_pending(BlockJob *job)
+static void block_job_event_pending(Notifier *n, void *opaque)
{
- job_state_transition(&job->job, JOB_STATUS_PENDING);
- if (!job->auto_finalize && !block_job_is_internal(job)) {
- qapi_event_send_block_job_pending(job_type(&job->job),
- job->job.id,
- &error_abort);
+ BlockJob *job = opaque;
+
+ if (block_job_is_internal(job)) {
+ return;
}
- return 0;
+
+ qapi_event_send_block_job_pending(job_type(&job->job),
+ job->job.id,
+ &error_abort);
}
/*
return NULL;
}
- if (job_id == NULL && !(flags & BLOCK_JOB_INTERNAL)) {
+ if (job_id == NULL && !(flags & JOB_INTERNAL)) {
job_id = bdrv_get_device_name(bs);
- if (!*job_id) {
- error_setg(errp, "An explicit job ID is required for this node");
- return NULL;
- }
- }
-
- if (job_id) {
- if (flags & BLOCK_JOB_INTERNAL) {
- error_setg(errp, "Cannot specify job ID for internal block job");
- return NULL;
- }
}
blk = blk_new(perm, shared_perm);
return NULL;
}
- job = job_create(job_id, &driver->job_driver, errp);
+ job = job_create(job_id, &driver->job_driver, blk_get_aio_context(blk),
+ flags, cb, opaque, errp);
if (job == NULL) {
blk_unref(blk);
return NULL;
}
assert(is_block_job(&job->job));
+ assert(job->job.driver->free == &block_job_free);
+ assert(job->job.driver->user_resume == &block_job_user_resume);
job->driver = driver;
job->blk = blk;
- job->cb = cb;
- job->opaque = opaque;
- job->busy = false;
- job->paused = true;
- job->pause_count = 1;
- job->refcnt = 1;
- job->auto_finalize = !(flags & BLOCK_JOB_MANUAL_FINALIZE);
- job->auto_dismiss = !(flags & BLOCK_JOB_MANUAL_DISMISS);
- aio_timer_init(qemu_get_aio_context(), &job->sleep_timer,
- QEMU_CLOCK_REALTIME, SCALE_NS,
- block_job_sleep_timer_cb, job);
+
+ job->finalize_cancelled_notifier.notify = block_job_event_cancelled;
+ job->finalize_completed_notifier.notify = block_job_event_completed;
+ job->pending_notifier.notify = block_job_event_pending;
+
+ notifier_list_add(&job->job.on_finalize_cancelled,
+ &job->finalize_cancelled_notifier);
+ notifier_list_add(&job->job.on_finalize_completed,
+ &job->finalize_completed_notifier);
+ notifier_list_add(&job->job.on_pending, &job->pending_notifier);
error_setg(&job->blocker, "block device is in use by block job: %s",
job_type_str(&job->job));
block_job_set_speed(job, speed, &local_err);
if (local_err) {
- block_job_early_fail(job);
+ job_early_fail(&job->job);
error_propagate(errp, local_err);
return NULL;
}
return job;
}
-void block_job_early_fail(BlockJob *job)
-{
- assert(job->job.status == JOB_STATUS_CREATED);
- block_job_decommission(job);
-}
-
void block_job_completed(BlockJob *job, int ret)
{
- assert(job && job->txn && !job->completed);
+ assert(job && job->txn && !job_is_completed(&job->job));
assert(blk_bs(job->blk)->job == job);
- job->completed = true;
- job->ret = ret;
- block_job_update_rc(job);
- trace_block_job_completed(job, ret, job->ret);
- if (job->ret) {
+ job->job.ret = ret;
+ job_update_rc(&job->job);
+ trace_block_job_completed(job, ret, job->job.ret);
+ if (job->job.ret) {
block_job_completed_txn_abort(job);
} else {
block_job_completed_txn_success(job);
}
}
-static bool block_job_should_pause(BlockJob *job)
-{
- return job->pause_count > 0;
-}
-
-/* Yield, and schedule a timer to reenter the coroutine after @ns nanoseconds.
- * Reentering the job coroutine with block_job_enter() before the timer has
- * expired is allowed and cancels the timer.
- *
- * If @ns is (uint64_t) -1, no timer is scheduled and block_job_enter() must be
- * called explicitly. */
-static void block_job_do_yield(BlockJob *job, uint64_t ns)
-{
- block_job_lock();
- if (ns != -1) {
- timer_mod(&job->sleep_timer, ns);
- }
- job->busy = false;
- block_job_unlock();
- qemu_coroutine_yield();
-
- /* Set by block_job_enter before re-entering the coroutine. */
- assert(job->busy);
-}
-
-void coroutine_fn block_job_pause_point(BlockJob *job)
-{
- assert(job && block_job_started(job));
-
- if (!block_job_should_pause(job)) {
- return;
- }
- if (block_job_is_cancelled(job)) {
- return;
- }
-
- if (job->driver->pause) {
- job->driver->pause(job);
- }
-
- if (block_job_should_pause(job) && !block_job_is_cancelled(job)) {
- JobStatus status = job->job.status;
- job_state_transition(&job->job, status == JOB_STATUS_READY
- ? JOB_STATUS_STANDBY
- : JOB_STATUS_PAUSED);
- job->paused = true;
- block_job_do_yield(job, -1);
- job->paused = false;
- job_state_transition(&job->job, status);
- }
-
- if (job->driver->resume) {
- job->driver->resume(job);
- }
-}
-
-/*
- * Conditionally enter a block_job pending a call to fn() while
- * under the block_job_lock critical section.
- */
-static void block_job_enter_cond(BlockJob *job, bool(*fn)(BlockJob *job))
-{
- if (!block_job_started(job)) {
- return;
- }
- if (job->deferred_to_main_loop) {
- return;
- }
-
- block_job_lock();
- if (job->busy) {
- block_job_unlock();
- return;
- }
-
- if (fn && !fn(job)) {
- block_job_unlock();
- return;
- }
-
- assert(!job->deferred_to_main_loop);
- timer_del(&job->sleep_timer);
- job->busy = true;
- block_job_unlock();
- aio_co_wake(job->co);
-}
-
void block_job_enter(BlockJob *job)
{
- block_job_enter_cond(job, NULL);
-}
-
-bool block_job_is_cancelled(BlockJob *job)
-{
- return job->cancelled;
-}
-
-void block_job_sleep_ns(BlockJob *job, int64_t ns)
-{
- assert(job->busy);
-
- /* Check cancellation *before* setting busy = false, too! */
- if (block_job_is_cancelled(job)) {
- return;
- }
-
- if (!block_job_should_pause(job)) {
- block_job_do_yield(job, qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + ns);
- }
-
- block_job_pause_point(job);
+ job_enter_cond(&job->job, NULL);
}
void block_job_yield(BlockJob *job)
{
- assert(job->busy);
+ assert(job->job.busy);
/* Check cancellation *before* setting busy = false, too! */
- if (block_job_is_cancelled(job)) {
+ if (job_is_cancelled(&job->job)) {
return;
}
- if (!block_job_should_pause(job)) {
- block_job_do_yield(job, -1);
+ if (!job_should_pause(&job->job)) {
+ job_do_yield(&job->job, -1);
}
- block_job_pause_point(job);
+ job_pause_point(&job->job);
}
void block_job_iostatus_reset(BlockJob *job)
if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) {
return;
}
- assert(job->user_paused && job->pause_count > 0);
+ assert(job->job.user_paused && job->job.pause_count > 0);
job->iostatus = BLOCK_DEVICE_IO_STATUS_OK;
}
+void block_job_user_resume(Job *job)
+{
+ BlockJob *bjob = container_of(job, BlockJob, job);
+ block_job_iostatus_reset(bjob);
+}
+
void block_job_event_ready(BlockJob *job)
{
job_state_transition(&job->job, JOB_STATUS_READY);
action, &error_abort);
}
if (action == BLOCK_ERROR_ACTION_STOP) {
- block_job_pause(job);
+ job_pause(&job->job);
/* make the pause user visible, which will be resumed from QMP. */
- job->user_paused = true;
+ job->job.user_paused = true;
block_job_iostatus_set_err(job, error);
}
return action;
}
-
-typedef struct {
- BlockJob *job;
- AioContext *aio_context;
- BlockJobDeferToMainLoopFn *fn;
- void *opaque;
-} BlockJobDeferToMainLoopData;
-
-static void block_job_defer_to_main_loop_bh(void *opaque)
-{
- BlockJobDeferToMainLoopData *data = opaque;
- AioContext *aio_context;
-
- /* Prevent race with block_job_defer_to_main_loop() */
- aio_context_acquire(data->aio_context);
-
- /* Fetch BDS AioContext again, in case it has changed */
- aio_context = blk_get_aio_context(data->job->blk);
- if (aio_context != data->aio_context) {
- aio_context_acquire(aio_context);
- }
-
- data->fn(data->job, data->opaque);
-
- if (aio_context != data->aio_context) {
- aio_context_release(aio_context);
- }
-
- aio_context_release(data->aio_context);
-
- g_free(data);
-}
-
-void block_job_defer_to_main_loop(BlockJob *job,
- BlockJobDeferToMainLoopFn *fn,
- void *opaque)
-{
- BlockJobDeferToMainLoopData *data = g_malloc(sizeof(*data));
- data->job = job;
- data->aio_context = blk_get_aio_context(job->blk);
- data->fn = fn;
- data->opaque = opaque;
- job->deferred_to_main_loop = true;
-
- aio_bh_schedule_oneshot(qemu_get_aio_context(),
- block_job_defer_to_main_loop_bh, data);
-}
projects / mirror_qemu.git / blobdiff