It's unused now (except for permission handling)[*]. The only reasonable user of it was block-stream job, recently updated to use own blk. And other block jobs prefer to use own source node related objects.
So, the arguments of dropping the field are: - block jobs prefer not to use it - block jobs usually has more then one node to operate on, and better to operate symmetrically (for example has both source and target blk's in specific block-job state structure) *: BlockJob.blk is used to keep some permissions. We simply move permissions to block-job child created in block_job_create() together with blk. In mirror, we just should not care anymore about restoring state of blk. Most probably this code could be dropped long ago, after dropping bs->job pointer. Now it finally goes away together with BlockJob.blk itself. iotest 141 output is updated, as "bdrv_has_blk(bs)" check in qmp_blockdev_del() doesn't fail (we don't have blk now). Still, new error message looks even better. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com> --- include/block/blockjob.h | 3 --- block/mirror.c | 7 ------- blockjob.c | 19 ++----------------- tests/qemu-iotests/141.out | 2 +- 4 files changed, 3 insertions(+), 28 deletions(-) diff --git a/include/block/blockjob.h b/include/block/blockjob.h index 3b84805140..87fbb3985f 100644 --- a/include/block/blockjob.h +++ b/include/block/blockjob.h @@ -43,9 +43,6 @@ typedef struct BlockJob { /** Data belonging to the generic Job infrastructure */ Job job; - /** The block device on which the job is operating. */ - BlockBackend *blk; - /** Status that is published by the query-block-jobs QMP API */ BlockDeviceIoStatus iostatus; diff --git a/block/mirror.c b/block/mirror.c index 840b8e8c15..cbebcf8798 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -754,13 +754,6 @@ static int mirror_exit_common(Job *job) block_job_remove_all_bdrv(bjob); bdrv_replace_node(mirror_top_bs, mirror_top_bs->backing->bs, &error_abort); - /* We just changed the BDS the job BB refers to (with either or both of the - * bdrv_replace_node() calls), so switch the BB back so the cleanup does - * the right thing. We don't need any permissions any more now. */ - blk_remove_bs(bjob->blk); - blk_set_perm(bjob->blk, 0, BLK_PERM_ALL, &error_abort); - blk_insert_bs(bjob->blk, mirror_top_bs, &error_abort); - bs_opaque->job = NULL; bdrv_drained_end(src); diff --git a/blockjob.c b/blockjob.c index 2c168b93b0..70f3220ffd 100644 --- a/blockjob.c +++ b/blockjob.c @@ -86,7 +86,6 @@ void block_job_free(Job *job) BlockJob *bjob = container_of(job, BlockJob, job); block_job_remove_all_bdrv(bjob); - blk_unref(bjob->blk); error_free(bjob->blocker); } @@ -419,22 +418,15 @@ void *block_job_create(const char *job_id, const BlockJobDriver *driver, uint64_t shared_perm, int64_t speed, int flags, BlockCompletionFunc *cb, void *opaque, Error **errp) { - BlockBackend *blk; BlockJob *job; if (job_id == NULL && !(flags & JOB_INTERNAL)) { job_id = bdrv_get_device_name(bs); } - blk = blk_new_with_bs(bs, perm, shared_perm, errp); - if (!blk) { - return NULL; - } - - job = job_create(job_id, &driver->job_driver, txn, blk_get_aio_context(blk), + job = job_create(job_id, &driver->job_driver, txn, bdrv_get_aio_context(bs), flags, cb, opaque, errp); if (job == NULL) { - blk_unref(blk); return NULL; } @@ -442,8 +434,6 @@ void *block_job_create(const char *job_id, const BlockJobDriver *driver, assert(job->job.driver->free == &block_job_free); assert(job->job.driver->user_resume == &block_job_user_resume); - job->blk = blk; - job->finalize_cancelled_notifier.notify = block_job_event_cancelled; job->finalize_completed_notifier.notify = block_job_event_completed; job->pending_notifier.notify = block_job_event_pending; @@ -460,15 +450,10 @@ void *block_job_create(const char *job_id, const BlockJobDriver *driver, error_setg(&job->blocker, "block device is in use by block job: %s", job_type_str(&job->job)); - block_job_add_bdrv(job, "main node", bs, 0, BLK_PERM_ALL, &error_abort); + block_job_add_bdrv(job, "main node", bs, perm, shared_perm, &error_abort); bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker); - /* Disable request queuing in the BlockBackend to avoid deadlocks on drain: - * The job reports that it's busy until it reaches a pause point. */ - blk_set_disable_request_queuing(blk, true); - blk_set_allow_aio_context_change(blk, true); - /* Only set speed when necessary to avoid NotSupported error */ if (speed != 0) { if (!block_job_set_speed(job, speed, errp)) { diff --git a/tests/qemu-iotests/141.out b/tests/qemu-iotests/141.out index c4c15fb275..63203d9944 100644 --- a/tests/qemu-iotests/141.out +++ b/tests/qemu-iotests/141.out @@ -132,7 +132,7 @@ wrote 1048576/1048576 bytes at offset 0 {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job0"}} {'execute': 'blockdev-del', 'arguments': {'node-name': 'drv0'}} -{"error": {"class": "GenericError", "desc": "Node drv0 is in use"}} +{"error": {"class": "GenericError", "desc": "Node 'drv0' is busy: block device is in use by block job: commit"}} {'execute': 'block-job-cancel', 'arguments': {'device': 'job0'}} {"return": {}} -- 2.29.2