The file-posix code is used for the "file", "host_device" and "host_cdrom" drivers, and it allows reopening images. However the only option that is actually processed is "x-check-cache-dropped", and changes in all other options (e.g. "filename") are silently ignored:
(qemu) qemu-io virtio0 "reopen -o file.filename=no-such-file" While we could allow changing some of the other options, let's keep things as they are for now but return an error if the user tries to change any of them. Signed-off-by: Alberto Garcia <be...@igalia.com> Reviewed-by: Max Reitz <mre...@redhat.com> --- block/file-posix.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/block/file-posix.c b/block/file-posix.c index ddac0cc3e6..d4ec2cb3dd 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -850,8 +850,13 @@ static int raw_reopen_prepare(BDRVReopenState *state, goto out; } - rs->check_cache_dropped = qemu_opt_get_bool(opts, "x-check-cache-dropped", - false); + rs->check_cache_dropped = + qemu_opt_get_bool_del(opts, "x-check-cache-dropped", false); + + /* This driver's reopen function doesn't currently allow changing + * other options, so let's put them back in the original QDict and + * bdrv_reopen_prepare() will detect changes and complain. */ + qemu_opts_to_qdict(opts, state->options); if (s->type == FTYPE_CD) { rs->open_flags |= O_NONBLOCK; -- 2.11.0