@@ -2452,6 +2452,7 @@ void qmp_blockdev_backup(const char *device, const char *target,
BlockdevOnError on_target_error,
Error **errp)
{
+ BlockBackend *blk;
BlockDriverState *bs;
BlockDriverState *target_bs;
Error *local_err = NULL;
@@ -2467,15 +2468,21 @@ void qmp_blockdev_backup(const char *device, const char *target,
on_target_error = BLOCKDEV_ON_ERROR_REPORT;
}
- bs = bdrv_find(device);
- if (!bs) {
+ blk = blk_by_name(device);
+ if (!blk) {
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
return;
}
- aio_context = bdrv_get_aio_context(bs);
+ aio_context = blk_get_aio_context(blk);
aio_context_acquire(aio_context);
+ if (!blk_is_available(blk)) {
+ error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
+ goto out;
+ }
+ bs = blk_bs(blk);
+
target_bs = bdrv_find(target);
if (!target_bs) {
error_set(errp, QERR_DEVICE_NOT_FOUND, target);
Call blk_is_available() before using blk_bs() to obtain the root BlockDriverState behind the BlockBackend. Signed-off-by: Max Reitz <mreitz@redhat.com> --- blockdev.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-)