Am 13.01.2012 14:14, schrieb Stefan Hajnoczi:
> Signed-off-by: Stefan Hajnoczi <stefa...@linux.vnet.ibm.com>
> ---
> block.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
> block_int.h | 40 ++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 88 insertions(+), 0 deletions(-)
>
> diff --git a/block.c b/block.c
> index daf92c2..d588ee8 100644
> --- a/block.c
> +++ b/block.c
> @@ -3877,3 +3877,51 @@ out:
>
> return ret;
> }
> +
> +void *block_job_create(const BlockJobType *job_type, BlockDriverState *bs,
> + BlockDriverCompletionFunc *cb, void *opaque)
> +{
> + BlockJob *job;
> +
> + if (bs->job || bdrv_in_use(bs)) {
> + return NULL;
> + }
> + bdrv_set_in_use(bs, 1);
> +
> + job = g_malloc0(job_type->instance_size);
> + job->job_type = job_type;
> + job->bs = bs;
> + job->cb = cb;
> + job->opaque = opaque;
> + bs->job = job;
> + return job;
> +}
> +
> +void block_job_complete(BlockJob *job, int ret)
> +{
> + BlockDriverState *bs = job->bs;
> +
> + assert(bs->job == job);
> + job->cb(job->opaque, ret);
> + bs->job = NULL;
> + g_free(job);
> + bdrv_set_in_use(bs, 0);
> +}
> +
> +int block_job_set_speed(BlockJob *job, int64_t value)
> +{
> + if (!job->job_type->set_speed) {
> + return -ENOTSUP;
> + }
> + return job->job_type->set_speed(job, value);
> +}
> +
> +void block_job_cancel(BlockJob *job)
> +{
> + job->cancelled = true;
> +}
> +
> +bool block_job_is_cancelled(BlockJob *job)
> +{
> + return job->cancelled;
> +}
> diff --git a/block_int.h b/block_int.h
> index 5362180..316443e 100644
> --- a/block_int.h
> +++ b/block_int.h
> @@ -69,6 +69,36 @@ typedef struct BlockIOBaseValue {
> uint64_t ios[2];
> } BlockIOBaseValue;
>
> +typedef void BlockJobCancelFunc(void *opaque);
> +typedef struct BlockJob BlockJob;
> +typedef struct BlockJobType {
> + /** Derived BlockJob struct size */
> + size_t instance_size;
> +
> + /** String describing the operation, part of query-block-jobs QMP API */
> + const char *job_type;
> +
> + /** Optional callback for job types that support setting a speed limit */
> + int (*set_speed)(BlockJob *job, int64_t value);
Would be worth mentioning what the unit of value is.
Kevin
