diff options
Diffstat (limited to 'block/qcow.c')
| -rw-r--r-- | block/qcow.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/block/qcow.c b/block/qcow.c index 1e134f3445..e514a86fe5 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -938,10 +938,11 @@ static int coroutine_fn qcow_co_create_opts(BlockDriver *drv, { BlockdevCreateOptions *create_options = NULL; BlockDriverState *bs = NULL; - QDict *qdict; + QDict *qdict = NULL; Visitor *v; const char *val; int ret; + char *backing_fmt; static const QDictRenames opt_renames[] = { { BLOCK_OPT_BACKING_FILE, "backing-file" }, @@ -949,6 +950,17 @@ static int coroutine_fn qcow_co_create_opts(BlockDriver *drv, { NULL, NULL }, }; + /* + * We can't actually store a backing format, but can check that + * the user's request made sense. + */ + backing_fmt = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FMT); + if (backing_fmt && !bdrv_find_format(backing_fmt)) { + error_setg(errp, "unrecognized backing format '%s'", backing_fmt); + ret = -EINVAL; + goto fail; + } + /* Parse options and convert legacy syntax */ qdict = qemu_opts_to_qdict_filtered(opts, NULL, &qcow_create_opts, true); @@ -1012,6 +1024,7 @@ static int coroutine_fn qcow_co_create_opts(BlockDriver *drv, ret = 0; fail: + g_free(backing_fmt); qobject_unref(qdict); bdrv_unref(bs); qapi_free_BlockdevCreateOptions(create_options); @@ -1147,6 +1160,11 @@ static QemuOptsList qcow_create_opts = { .help = "File name of a base image" }, { + .name = BLOCK_OPT_BACKING_FMT, + .type = QEMU_OPT_STRING, + .help = "Format of the backing image", + }, + { .name = BLOCK_OPT_ENCRYPT, .type = QEMU_OPT_BOOL, .help = "Encrypt the image with format 'aes'. (Deprecated " |