From: Alberto Garcia Date: Thu, 6 Sep 2018 09:37:07 +0000 (+0300) Subject: file-posix: Forbid trying to change unsupported options during reopen X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8d3245750be30f3191f710f52fbe53ca10e78bfc;p=qemu.git file-posix: Forbid trying to change unsupported options during reopen 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 Reviewed-by: Max Reitz Signed-off-by: Kevin Wolf --- diff --git a/block/file-posix.c b/block/file-posix.c index bc5e54560a..2da3a76355 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -849,8 +849,13 @@ 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;