OpenE2K/qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

blockjob: Factor out block_job_remove_all_bdrv()

Browse Source 
In some cases, we want to remove op blockers on intermediate nodes
before the whole block job transaction has completed (because they block
restoring the final graph state during completion). Provide a function
for this.

The whole block job lifecycle is a bit messed up and it's hard to
actually do all things in the right order, but I'll leave simplifying
this for another day.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Acked-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Kevin Wolf 2017-02-28 12:45:58 +01:00
parent 3e44c8e08a
commit bbc02b90bc
2 changed files with 22 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
blockjob.c
View File

@ -128,6 +128,18 @@ static void block_job_detach_aio_context(void *opaque)
block_job_unref(job);
}
void block_job_remove_all_bdrv(BlockJob *job)
{
GSList *l;
for (l = job->nodes; l; l = l->next) {
BdrvChild *c = l->data;
bdrv_op_unblock_all(c->bs, job->blocker);
bdrv_root_unref_child(c);
}
g_slist_free(job->nodes);
job->nodes = NULL;
}
int block_job_add_bdrv(BlockJob *job, const char *name, BlockDriverState *bs,
uint64_t perm, uint64_t shared_perm, Error **errp)
{
@ -258,15 +270,9 @@ void block_job_ref(BlockJob *job)
void block_job_unref(BlockJob *job)
{
if (--job->refcnt == 0) {
GSList *l;
BlockDriverState *bs = blk_bs(job->blk);
bs->job = NULL;
for (l = job->nodes; l; l = l->next) {
BdrvChild *c = l->data;
bdrv_op_unblock_all(c->bs, job->blocker);
bdrv_root_unref_child(c);
}
g_slist_free(job->nodes);
block_job_remove_all_bdrv(job);
blk_remove_aio_context_notifier(job->blk,
block_job_attached_aio_context,
block_job_detach_aio_context, job);

9
include/block/blockjob.h
View File

@ -180,6 +180,15 @@ BlockJob *block_job_get(const char *id);
int block_job_add_bdrv(BlockJob *job, const char *name, BlockDriverState *bs,
uint64_t perm, uint64_t shared_perm, Error **errp);
/**
* block_job_remove_all_bdrv:
* @job: The block job
*
* Remove all BlockDriverStates from the list of nodes that are involved in the
* job. This removes the blockers added with block_job_add_bdrv().
*/
void block_job_remove_all_bdrv(BlockJob *job);
/**
* block_job_set_speed:
* @job: The job to set the speed for.