@@ -948,14 +948,19 @@ int bdrv_file_open(BlockDriverState **pbs, const char *filename,
goto fail;
}
- ret = bdrv_open_common(bs, NULL, options, flags, drv, &local_err);
+ if (!drv->bdrv_file_open) {
+ ret = bdrv_open(bs, filename, options, flags, drv, &local_err);
+ options = NULL;
+ } else {
+ ret = bdrv_open_common(bs, NULL, options, flags, drv, &local_err);
+ }
if (ret < 0) {
error_propagate(errp, local_err);
goto fail;
}
/* Check if any unknown options were used */
- if (qdict_size(options) != 0) {
+ if (options && (qdict_size(options) != 0)) {
const QDictEntry *entry = qdict_first(options);
error_setg(errp, "Block protocol '%s' doesn't support the option '%s'",
drv->format_name, entry->key);
@@ -222,7 +222,7 @@ QEMU X.Y.Z monitor - type 'help' for more information
(qemu) q[K[Dqu[K[D[Dqui[K[D[D[Dquit[K
Testing: -drive file=TEST_DIR/t.qcow2,file.driver=qcow2
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,file.driver=qcow2: could not open disk image TEST_DIR/t.qcow2: Can't use 'qcow2' as a block driver for the protocol level
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,file.driver=qcow2: could not open disk image TEST_DIR/t.qcow2: Block format 'qcow2' used by device '' doesn't support the option 'filename'
=== Parsing protocol from file name ===
It should be possible to use a format as a driver for a file which in turn requires another file, i.e., nesting file formats. Allowing nested file formats results in e.g. qcow2 BlockDriverStates never being directly passed to bdrv_open_common() from bdrv_file_open(), but instead being handed through bdrv_open(). This changes the error message when trying to give a filename to qcow2, i.e. trying to use it as a driver for the protocol level. Therefore, change the reference output of I/O test 051 accordingly. Signed-off-by: Max Reitz <mreitz@redhat.com> --- block.c | 9 +++++++-- tests/qemu-iotests/051.out | 2 +- 2 files changed, 8 insertions(+), 3 deletions(-)