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block: bdrv_insert_node(): don't use bdrv_open() 

Use bdrv_new_open_driver_opts() instead of complicated bdrv_open().

Among other extra things bdrv_open() also check for white-listed
formats, which we don't want for internal node creation: currently
backup doesn't work when copy-before-write filter is not white-listed.
As well block-stream doesn't work when copy-on-read is not
white-listed.

Fixes: 751cec7a26
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=2004812
Reported-by: Yanan Fu
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20210920115538.264372-5-vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2021-09-20 14:55:37 +03:00 committed by Kevin Wolf
parent 96796fae6f
commit b11c8739ae
1 changed files with 28 additions and 6 deletions
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34
block.c
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@ -5133,12 +5133,30 @@ BlockDriverState *bdrv_insert_node(BlockDriverState *bs, QDict *options,
{
ERRP_GUARD();
int ret;
BlockDriverState *new_node_bs;
BlockDriverState *new_node_bs = NULL;
const char *drvname, *node_name;
BlockDriver *drv;
new_node_bs = bdrv_open(NULL, NULL, options, flags, errp);
if (new_node_bs == NULL) {
drvname = qdict_get_try_str(options, "driver");
if (!drvname) {
error_setg(errp, "driver is not specified");
goto fail;
}
drv = bdrv_find_format(drvname);
if (!drv) {
error_setg(errp, "Unknown driver: '%s'", drvname);
goto fail;
}
node_name = qdict_get_try_str(options, "node-name");
new_node_bs = bdrv_new_open_driver_opts(drv, node_name, options, flags,
errp);
options = NULL; /* bdrv_new_open_driver() eats options */
if (!new_node_bs) {
error_prepend(errp, "Could not create node: ");
return NULL;
goto fail;
}
bdrv_drained_begin(bs);
@ -5147,11 +5165,15 @@ BlockDriverState *bdrv_insert_node(BlockDriverState *bs, QDict *options,
if (ret < 0) {
error_prepend(errp, "Could not replace node: ");
bdrv_unref(new_node_bs);
return NULL;
goto fail;
}
return new_node_bs;
fail:
qobject_unref(options);
bdrv_unref(new_node_bs);
return NULL;
}
/*