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block: Create the commit block job before reopening any image

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If the base or overlay images need to be reopened in read-write mode
but the block_job_create() call fails then no one will put those
images back in read-only mode.

We can solve this problem easily by calling block_job_create() first.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Message-id: aa495045770a6f1a7cc5d408397a17c75097fdd8.1464346103.git.berto@igalia.com
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Alberto Garcia 2016-05-27 12:53:39 +02:00 committed by Max Reitz
parent 0824afda0c
commit 834fe28ddf
1 changed files with 6 additions and 5 deletions
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11
block/commit.c
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@ -236,6 +236,11 @@ void commit_start(BlockDriverState *bs, BlockDriverState *base,
return;
}
s = block_job_create(&commit_job_driver, bs, speed, cb, opaque, errp);
if (!s) {
return;
}
orig_base_flags = bdrv_get_flags(base);
orig_overlay_flags = bdrv_get_flags(overlay_bs);
@ -252,16 +257,12 @@ void commit_start(BlockDriverState *bs, BlockDriverState *base,
bdrv_reopen_multiple(reopen_queue, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
block_job_unref(&s->common);
return;
}
}
s = block_job_create(&commit_job_driver, bs, speed, cb, opaque, errp);
if (!s) {
return;
}
s->base = blk_new();
blk_insert_bs(s->base, base);