If you open an image temporarily just because you want to check its size
or get it flushed, there's no real reason to open the whole backing file
chain.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
/* Get the required size from the image */
bs1 = bdrv_new("");
QINCREF(options);
- ret = bdrv_open(bs1, filename, options, 0, drv, &local_err);
+ ret = bdrv_open(bs1, filename, options, BDRV_O_NO_BACKING,
+ drv, &local_err);
if (ret < 0) {
bdrv_unref(bs1);
goto fail;
/* Reopen the image without BDRV_O_NO_FLUSH to flush it before returning */
ret = bdrv_open(bs, filename, NULL,
- BDRV_O_RDWR | BDRV_O_CACHE_WB, drv, &local_err);
+ BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_BACKING,
+ drv, &local_err);
if (error_is_set(&local_err)) {
error_propagate(errp, local_err);
goto out;
}
if (backing_file) {
BlockDriverState *bs = bdrv_new("");
- ret = bdrv_open(bs, backing_file, NULL, 0, NULL, errp);
+ ret = bdrv_open(bs, backing_file, NULL, BDRV_O_NO_BACKING, NULL, errp);
if (ret != 0) {
bdrv_unref(bs);
return ret;