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job: Add reference counting

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This moves reference counting from BlockJob to Job.

In order to keep calling the BlockJob cleanup code when the job is
deleted via job_unref(), introduce a new JobDriver.free callback. Every
block job must use block_job_free() for this callback, this is asserted
in block_job_create().

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 2018-04-13 18:50:05 +02:00
parent a50c2ab858
commit 80fa2c756b
13 changed files with 77 additions and 59 deletions
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4
qemu-img.c
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@ -861,7 +861,7 @@ static void run_block_job(BlockJob *job, Error **errp)
int ret = 0;
aio_context_acquire(aio_context);
block_job_ref(job);
job_ref(&job->job);
do {
aio_poll(aio_context, true);
qemu_progress_print(job->len ?
@ -873,7 +873,7 @@ static void run_block_job(BlockJob *job, Error **errp)
} else {
ret = job->ret;
}
block_job_unref(job);
job_unref(&job->job);
aio_context_release(aio_context);
/* publish completion progress only when success */