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block: keep a list of block jobs 

The current way to obtain the list of existing block jobs is to
iterate over all root nodes and check which ones own a job.

Since we want to be able to support block jobs in other nodes as well,
this patch keeps a list of jobs that is updated every time one is
created or destroyed.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Alberto Garcia 2016-04-04 16:43:51 +03:00 committed by Kevin Wolf
parent d004bd52aa
commit a7112795c1
2 changed files with 27 additions and 0 deletions
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13
blockjob.c
View File

@ -50,6 +50,16 @@ struct BlockJobTxn {
int refcnt;
};
static QLIST_HEAD(, BlockJob) block_jobs = QLIST_HEAD_INITIALIZER(block_jobs);
BlockJob *block_job_next(BlockJob *job)
{
if (!job) {
return QLIST_FIRST(&block_jobs);
}
return QLIST_NEXT(job, job_list);
}
void *block_job_create(const BlockJobDriver *driver, BlockDriverState *bs,
int64_t speed, BlockCompletionFunc *cb,
void *opaque, Error **errp)
@ -76,6 +86,8 @@ void *block_job_create(const BlockJobDriver *driver, BlockDriverState *bs,
job->refcnt = 1;
bs->job = job;
QLIST_INSERT_HEAD(&block_jobs, job, job_list);
/* Only set speed when necessary to avoid NotSupported error */
if (speed != 0) {
Error *local_err = NULL;
@ -103,6 +115,7 @@ void block_job_unref(BlockJob *job)
bdrv_unref(job->bs);
error_free(job->blocker);
g_free(job->id);
QLIST_REMOVE(job, job_list);
g_free(job);
}
}

14
include/block/blockjob.h
View File

@ -135,6 +135,9 @@ struct BlockJob {
*/
bool deferred_to_main_loop;
/** Element of the list of block jobs */
QLIST_ENTRY(BlockJob) job_list;
/** Status that is published by the query-block-jobs QMP API */
BlockDeviceIoStatus iostatus;
@ -172,6 +175,17 @@ struct BlockJob {
QLIST_ENTRY(BlockJob) txn_list;
};
/**
* block_job_next:
* @job: A block job, or %NULL.
*
* Get the next element from the list of block jobs after @job, or the
* first one if @job is %NULL.
*
* Returns the requested job, or %NULL if there are no more jobs left.
*/
BlockJob *block_job_next(BlockJob *job);
/**
* block_job_create:
* @job_type: The class object for the newly-created job.