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job: Add Job.aio_context

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When block jobs need an AioContext, they just take it from their main
block node. Generic jobs don't have a main block node, so we need to
assign them an AioContext explicitly.

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 13:49:33 +02:00
parent daa7f2f946
commit 08be6fe26f
3 changed files with 13 additions and 3 deletions
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5
blockjob.c
View File

@ -216,6 +216,7 @@ 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);
}
@ -247,6 +248,7 @@ static void block_job_detach_aio_context(void *opaque)
block_job_drain(job);
}
job->job.aio_context = NULL;
job_unref(&job->job);
}
@ -899,7 +901,8 @@ void *block_job_create(const char *job_id, const BlockJobDriver *driver,
return NULL;
}
job = job_create(job_id, &driver->job_driver, errp);
job = job_create(job_id, &driver->job_driver, blk_get_aio_context(blk),
errp);
if (job == NULL) {
blk_unref(blk);
return NULL;

7
include/qemu/job.h
View File

@ -47,6 +47,9 @@ typedef struct Job {
/** Current state; See @JobStatus for details. */
JobStatus status;
/** AioContext to run the job coroutine in */
AioContext *aio_context;
/**
* Set to true if the job should cancel itself. The flag must
* always be tested just before toggling the busy flag from false
@ -79,9 +82,11 @@ struct JobDriver {
*
* @job_id: The id of the newly-created job, or %NULL for internal jobs
* @driver: The class object for the newly-created job.
* @ctx: The AioContext to run the job coroutine in.
* @errp: Error object.
*/
void *job_create(const char *job_id, const JobDriver *driver, Error **errp);
void *job_create(const char *job_id, const JobDriver *driver, AioContext *ctx,
Error **errp);
/**
* Add a reference to Job refcnt, it will be decreased with job_unref, and then

4
job.c
View File

@ -121,7 +121,8 @@ Job *job_get(const char *id)
return NULL;
}
void *job_create(const char *job_id, const JobDriver *driver, Error **errp)
void *job_create(const char *job_id, const JobDriver *driver, AioContext *ctx,
Error **errp)
{
Job *job;
@ -140,6 +141,7 @@ void *job_create(const char *job_id, const JobDriver *driver, Error **errp)
job->driver = driver;
job->id = g_strdup(job_id);
job->refcnt = 1;
job->aio_context = ctx;
job_state_transition(job, JOB_STATUS_CREATED);