From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49530) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XtGn5-0000bm-Ru for qemu-devel@nongnu.org; Tue, 25 Nov 2014 09:08:32 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XtGmz-0006hF-34 for qemu-devel@nongnu.org; Tue, 25 Nov 2014 09:08:27 -0500 From: Max Reitz Date: Tue, 25 Nov 2014 15:07:57 +0100 Message-Id: <1416924485-13304-5-git-send-email-mreitz@redhat.com> In-Reply-To: <1416924485-13304-1-git-send-email-mreitz@redhat.com> References: <1416924485-13304-1-git-send-email-mreitz@redhat.com> Subject: [Qemu-devel] [PATCH 04/12] block: Check create_opts before image creation List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Kevin Wolf , Peter Lieven , qemu-stable@nongnu.org, Markus Armbruster , Stefan Hajnoczi , Max Reitz If a driver supports image creation, it needs to set the .create_opts field. We can use that to make sure .create_opts for both drivers involved is not NULL in bdrv_img_create(), which is important so that the create_opts pointer in that function is not NULL after the qemu_opts_append() calls and when going into qemu_opts_create(). Cc: qemu-stable@nongnu.org Signed-off-by: Max Reitz --- block.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/block.c b/block.c index b31fb67..1e4a72f 100644 --- a/block.c +++ b/block.c @@ -5560,6 +5560,18 @@ void bdrv_img_create(const char *filename, const char *fmt, return; } + if (!drv->create_opts) { + error_setg(errp, "Format driver '%s' does not support image creation", + drv->format_name); + return; + } + + if (!proto_drv->create_opts) { + error_setg(errp, "Protocol driver '%s' does not support image creation", + proto_drv->format_name); + return; + } + create_opts = qemu_opts_append(create_opts, drv->create_opts); create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); -- 1.9.3