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block/stream: add own blk 

block-stream is the only block-job, that reasonably use BlockJob.blk.
We are going to drop BlockJob.blk soon. So, let block-stream have own
blk.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Nikita Lapshin <nikita.lapshin@virtuozzo.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2021-05-06 17:13:55 +03:00
parent 7ac68e2920
commit 048954e2f6
1 changed files with 18 additions and 6 deletions
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24
block/stream.c
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@ -33,6 +33,7 @@ enum {
typedef struct StreamBlockJob {
BlockJob common;
BlockBackend *blk;
BlockDriverState *base_overlay; /* COW overlay (stream from this) */
BlockDriverState *above_base; /* Node directly above the base */
BlockDriverState *cor_filter_bs;
@ -88,17 +89,18 @@ static int stream_prepare(Job *job)
static void stream_clean(Job *job)
{
StreamBlockJob *s = container_of(job, StreamBlockJob, common.job);
BlockJob *bjob = &s->common;
if (s->cor_filter_bs) {
bdrv_cor_filter_drop(s->cor_filter_bs);
s->cor_filter_bs = NULL;
}
blk_unref(s->blk);
s->blk = NULL;
/* Reopen the image back in read-only mode if necessary */
if (s->bs_read_only) {
/* Give up write permissions before making it read-only */
blk_set_perm(bjob->blk, 0, BLK_PERM_ALL, &error_abort);
bdrv_reopen_set_read_only(s->target_bs, true, NULL);
}
@ -108,7 +110,6 @@ static void stream_clean(Job *job)
static int coroutine_fn stream_run(Job *job, Error **errp)
{
StreamBlockJob *s = container_of(job, StreamBlockJob, common.job);
BlockBackend *blk = s->common.blk;
BlockDriverState *unfiltered_bs = bdrv_skip_filters(s->target_bs);
int64_t len;
int64_t offset = 0;
@ -159,7 +160,7 @@ static int coroutine_fn stream_run(Job *job, Error **errp)
}
trace_stream_one_iteration(s, offset, n, ret);
if (copy) {
ret = stream_populate(blk, offset, n);
ret = stream_populate(s->blk, offset, n);
}
if (ret < 0) {
BlockErrorAction action =
@ -294,13 +295,24 @@ void stream_start(const char *job_id, BlockDriverState *bs,
}
s = block_job_create(job_id, &stream_job_driver, NULL, cor_filter_bs,
BLK_PERM_CONSISTENT_READ,
basic_flags | BLK_PERM_WRITE,
0, BLK_PERM_ALL,
speed, creation_flags, NULL, NULL, errp);
if (!s) {
goto fail;
}
s->blk = blk_new_with_bs(cor_filter_bs, BLK_PERM_CONSISTENT_READ,
basic_flags | BLK_PERM_WRITE, errp);
if (!s->blk) {
goto fail;
}
/*
* 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(s->blk, true);
blk_set_allow_aio_context_change(s->blk, true);
/*
* Prevent concurrent jobs trying to modify the graph structure here, we
* already have our own plans. Also don't allow resize as the image size is