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 <kw...@redhat.com>
Acked-by: Fam Zheng <f...@redhat.com>
Reviewed-by: Max Reitz <mre...@redhat.com>
---
blockjob.c | 20 +++++++++++++-------
include/block/blockjob.h | 9 +++++++++
2 files changed, 22 insertions(+), 7 deletions(-)
diff --git a/blockjob.c b/blockjob.c
index 4216cde..69126af 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -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);
diff --git a/include/block/blockjob.h b/include/block/blockjob.h
index 9d65ef8..9e906f7 100644
--- a/include/block/blockjob.h
+++ b/include/block/blockjob.h
@@ -181,6 +181,15 @@ 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.
* @speed: The new value
--
1.8.3.1
