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job: Move cancelled to Job 

We cannot yet move the whole logic around job cancelling to Job because
it depends on quite a few other things that are still only in BlockJob,
but we can move the cancelled field at least.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
This commit is contained in:
Kevin Wolf 2018-04-17 12:56:07 +02:00
parent 80fa2c756b
commit daa7f2f946
11 changed files with 50 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
block/backup.c
View File

@ -329,7 +329,7 @@ static bool coroutine_fn yield_and_check(BackupBlockJob *job)
{
uint64_t delay_ns;
if (block_job_is_cancelled(&job->common)) {
if (job_is_cancelled(&job->common.job)) {
return true;
}
@ -339,7 +339,7 @@ static bool coroutine_fn yield_and_check(BackupBlockJob *job)
job->bytes_read = 0;
block_job_sleep_ns(&job->common, delay_ns);
if (block_job_is_cancelled(&job->common)) {
if (job_is_cancelled(&job->common.job)) {
return true;
}
@ -441,7 +441,7 @@ static void coroutine_fn backup_run(void *opaque)
if (job->sync_mode == MIRROR_SYNC_MODE_NONE) {
/* All bits are set in copy_bitmap to allow any cluster to be copied.
* This does not actually require them to be copied. */
while (!block_job_is_cancelled(&job->common)) {
while (!job_is_cancelled(&job->common.job)) {
/* Yield until the job is cancelled. We just let our before_write
* notify callback service CoW requests. */
block_job_yield(&job->common);

4
block/commit.c
View File

@ -90,7 +90,7 @@ static void commit_complete(BlockJob *job, void *opaque)
* the normal backing chain can be restored. */
blk_unref(s->base);
if (!block_job_is_cancelled(&s->common) && ret == 0) {
if (!job_is_cancelled(&s->common.job) && ret == 0) {
/* success */
ret = bdrv_drop_intermediate(s->commit_top_bs, base,
s->backing_file_str);
@ -172,7 +172,7 @@ static void coroutine_fn commit_run(void *opaque)
* with no pending I/O here so that bdrv_drain_all() returns.
*/
block_job_sleep_ns(&s->common, delay_ns);
if (block_job_is_cancelled(&s->common)) {
if (job_is_cancelled(&s->common.job)) {
break;
}
/* Copy if allocated above the base */

20
block/mirror.c
View File

@ -622,7 +622,7 @@ static int coroutine_fn mirror_dirty_init(MirrorBlockJob *s)
mirror_throttle(s);
if (block_job_is_cancelled(&s->common)) {
if (job_is_cancelled(&s->common.job)) {
s->initial_zeroing_ongoing = false;
return 0;
}
@ -650,7 +650,7 @@ static int coroutine_fn mirror_dirty_init(MirrorBlockJob *s)
mirror_throttle(s);
if (block_job_is_cancelled(&s->common)) {
if (job_is_cancelled(&s->common.job)) {
return 0;
}
@ -695,7 +695,7 @@ static void coroutine_fn mirror_run(void *opaque)
checking for a NULL string */
int ret = 0;
if (block_job_is_cancelled(&s->common)) {
if (job_is_cancelled(&s->common.job)) {
goto immediate_exit;
}
@ -729,10 +729,10 @@ static void coroutine_fn mirror_run(void *opaque)
/* Report BLOCK_JOB_READY and wait for complete. */
block_job_event_ready(&s->common);
s->synced = true;
while (!block_job_is_cancelled(&s->common) && !s->should_complete) {
while (!job_is_cancelled(&s->common.job) && !s->should_complete) {
block_job_yield(&s->common);
}
s->common.cancelled = false;
s->common.job.cancelled = false;
goto immediate_exit;
}
@ -768,7 +768,7 @@ static void coroutine_fn mirror_run(void *opaque)
s->last_pause_ns = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
if (!s->is_none_mode) {
ret = mirror_dirty_init(s);
if (ret < 0 || block_job_is_cancelled(&s->common)) {
if (ret < 0 || job_is_cancelled(&s->common.job)) {
goto immediate_exit;
}
}
@ -828,7 +828,7 @@ static void coroutine_fn mirror_run(void *opaque)
}
should_complete = s->should_complete ||
block_job_is_cancelled(&s->common);
job_is_cancelled(&s->common.job);
cnt = bdrv_get_dirty_count(s->dirty_bitmap);
}
@ -856,7 +856,7 @@ static void coroutine_fn mirror_run(void *opaque)
* completion.
*/
assert(QLIST_EMPTY(&bs->tracked_requests));
s->common.cancelled = false;
s->common.job.cancelled = false;
need_drain = false;
break;
}
@ -869,7 +869,7 @@ static void coroutine_fn mirror_run(void *opaque)
}
trace_mirror_before_sleep(s, cnt, s->synced, delay_ns);
block_job_sleep_ns(&s->common, delay_ns);
if (block_job_is_cancelled(&s->common) &&
if (job_is_cancelled(&s->common.job) &&
(!s->synced || s->common.force))
{
break;
@ -884,7 +884,7 @@ immediate_exit:
* the target is a copy of the source.
*/
assert(ret < 0 || ((s->common.force || !s->synced) &&
block_job_is_cancelled(&s->common)));
job_is_cancelled(&s->common.job)));
assert(need_drain);
mirror_wait_for_all_io(s);
}

4
block/stream.c
View File

@ -66,7 +66,7 @@ static void stream_complete(BlockJob *job, void *opaque)
BlockDriverState *base = s->base;
Error *local_err = NULL;
if (!block_job_is_cancelled(&s->common) && bs->backing &&
if (!job_is_cancelled(&s->common.job) && bs->backing &&
data->ret == 0) {
const char *base_id = NULL, *base_fmt = NULL;
if (base) {
@ -141,7 +141,7 @@ static void coroutine_fn stream_run(void *opaque)
* with no pending I/O here so that bdrv_drain_all() returns.
*/
block_job_sleep_ns(&s->common, delay_ns);
if (block_job_is_cancelled(&s->common)) {
if (job_is_cancelled(&s->common.job)) {
break;
}

28
blockjob.c
View File

@ -379,7 +379,7 @@ static void block_job_conclude(BlockJob *job)
static void block_job_update_rc(BlockJob *job)
{
if (!job->ret && block_job_is_cancelled(job)) {
if (!job->ret && job_is_cancelled(&job->job)) {
job->ret = -ECANCELED;
}
if (job->ret) {
@ -438,7 +438,7 @@ static int block_job_finalize_single(BlockJob *job)
/* Emit events only if we actually started */
if (block_job_started(job)) {
if (block_job_is_cancelled(job)) {
if (job_is_cancelled(&job->job)) {
block_job_event_cancelled(job);
} else {
const char *msg = NULL;
@ -464,7 +464,7 @@ static void block_job_cancel_async(BlockJob *job, bool force)
job->user_paused = false;
job->pause_count--;
}
job->cancelled = true;
job->job.cancelled = true;
/* To prevent 'force == false' overriding a previous 'force == true' */
job->force |= force;
}
@ -519,7 +519,8 @@ static int block_job_finish_sync(BlockJob *job,
while (!job->completed) {
aio_poll(qemu_get_aio_context(), true);
}
ret = (job->cancelled && job->ret == 0) ? -ECANCELED : job->ret;
ret = (job_is_cancelled(&job->job) && job->ret == 0)
? -ECANCELED : job->ret;
job_unref(&job->job);
return ret;
}
@ -557,7 +558,7 @@ static void block_job_completed_txn_abort(BlockJob *job)
other_job = QLIST_FIRST(&txn->jobs);
ctx = blk_get_aio_context(other_job->blk);
if (!other_job->completed) {
assert(other_job->cancelled);
assert(job_is_cancelled(&other_job->job));
block_job_finish_sync(other_job, NULL, NULL);
}
block_job_finalize_single(other_job);
@ -651,7 +652,9 @@ void block_job_complete(BlockJob *job, Error **errp)
if (job_apply_verb(&job->job, JOB_VERB_COMPLETE, errp)) {
return;
}
if (job->pause_count || job->cancelled || !job->driver->complete) {
if (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;
@ -1006,7 +1009,7 @@ void coroutine_fn block_job_pause_point(BlockJob *job)
if (!block_job_should_pause(job)) {
return;
}
if (block_job_is_cancelled(job)) {
if (job_is_cancelled(&job->job)) {
return;
}
@ -1014,7 +1017,7 @@ void coroutine_fn block_job_pause_point(BlockJob *job)
job->driver->pause(job);
}
if (block_job_should_pause(job) && !block_job_is_cancelled(job)) {
if (block_job_should_pause(job) && !job_is_cancelled(&job->job)) {
JobStatus status = job->job.status;
job_state_transition(&job->job, status == JOB_STATUS_READY
? JOB_STATUS_STANDBY
@ -1066,17 +1069,12 @@ 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)) {
if (job_is_cancelled(&job->job)) {
return;
}
@ -1092,7 +1090,7 @@ void block_job_yield(BlockJob *job)
assert(job->busy);
/* Check cancellation *before* setting busy = false, too! */
if (block_job_is_cancelled(job)) {
if (job_is_cancelled(&job->job)) {
return;
}

8
include/block/blockjob.h
View File

@ -56,14 +56,6 @@ typedef struct BlockJob {
*/
Coroutine *co;
/**
* Set to true if the job should cancel itself. The flag must
* always be tested just before toggling the busy flag from false
* to true. After a job has been cancelled, it should only yield
* if #aio_poll will ("sooner or later") reenter the coroutine.
*/
bool cancelled;
/**
* Set to true if the job should abort immediately without waiting
* for data to be in sync.

8
include/block/blockjob_int.h
View File

@ -195,14 +195,6 @@ void block_job_early_fail(BlockJob *job);
*/
void block_job_completed(BlockJob *job, int ret);
/**
* block_job_is_cancelled:
* @job: The job being queried.
*
* Returns whether the job is scheduled for cancellation.
*/
bool block_job_is_cancelled(BlockJob *job);
/**
* block_job_pause_point:
* @job: The job that is ready to pause.

11
include/qemu/job.h
View File

@ -47,6 +47,14 @@ typedef struct Job {
/** Current state; See @JobStatus for details. */
JobStatus status;
/**
* Set to true if the job should cancel itself. The flag must
* always be tested just before toggling the busy flag from false
* to true. After a job has been cancelled, it should only yield
* if #aio_poll will ("sooner or later") reenter the coroutine.
*/
bool cancelled;
/** Element of the list of jobs */
QLIST_ENTRY(Job) job_list;
} Job;
@ -93,6 +101,9 @@ JobType job_type(const Job *job);
/** Returns the enum string for the JobType of a given Job. */
const char *job_type_str(const Job *job);
/** Returns whether the job is scheduled for cancellation. */
bool job_is_cancelled(Job *job);
/**
* Get the next element from the list of block jobs after @job, or the
* first one if @job is %NULL.

5
job.c
View File

@ -95,6 +95,11 @@ const char *job_type_str(const Job *job)
return JobType_str(job_type(job));
}
bool job_is_cancelled(Job *job)
{
return job->cancelled;
}
Job *job_next(Job *job)
{
if (!job) {

6
tests/test-blockjob-txn.c
View File

@ -29,7 +29,7 @@ static void test_block_job_complete(BlockJob *job, void *opaque)
BlockDriverState *bs = blk_bs(job->blk);
int rc = (intptr_t)opaque;
if (block_job_is_cancelled(job)) {
if (job_is_cancelled(&job->job)) {
rc = -ECANCELED;
}
@ -49,7 +49,7 @@ static void coroutine_fn test_block_job_run(void *opaque)
block_job_yield(job);
}
if (block_job_is_cancelled(job)) {
if (job_is_cancelled(&job->job)) {
break;
}
}
@ -66,7 +66,7 @@ typedef struct {
static void test_block_job_cb(void *opaque, int ret)
{
TestBlockJobCBData *data = opaque;
if (!ret && block_job_is_cancelled(&data->job->common)) {
if (!ret && job_is_cancelled(&data->job->common.job)) {
ret = -ECANCELED;
}
*data->result = ret;

2
tests/test-blockjob.c
View File

@ -179,7 +179,7 @@ static void coroutine_fn cancel_job_start(void *opaque)
CancelJob *s = opaque;
while (!s->should_complete) {
if (block_job_is_cancelled(&s->common)) {
if (job_is_cancelled(&s->common.job)) {
goto defer;
}