From 31ca6d077c24b7aaa322d8930e3e5debbdb4a047 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Thu, 28 Mar 2013 15:29:24 +0100 Subject: block: Add driver-specific options for backing files Options starting in "backing." are passed to the backing file now. If you don't need to specify the filename for the backing file, you can add it on the command line instead of in the image file: $ qemu-nbd -t /tmp/test.img $ qemu-img create -f qcow2 empty.qcow2 1G $ qemu-system-x86_64 -drive file=empty.qcow2,backing.file.driver=nbd,\ backing.file.host=localhost Note that this doesn't override the backing filename from the image. If the image has one, this will fail because NBD doesn't want the options and a filename at the same time. Signed-off-by: Kevin Wolf Reviewed-by: Eric Blake --- include/block/block.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/block') diff --git a/include/block/block.h b/include/block/block.h index ebd95127a1..1251c5cf9f 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -137,7 +137,7 @@ int bdrv_parse_cache_flags(const char *mode, int *flags); int bdrv_parse_discard_flags(const char *mode, int *flags); int bdrv_file_open(BlockDriverState **pbs, const char *filename, QDict *options, int flags); -int bdrv_open_backing_file(BlockDriverState *bs); +int bdrv_open_backing_file(BlockDriverState *bs, QDict *options); int bdrv_open(BlockDriverState *bs, const char *filename, QDict *options, int flags, BlockDriver *drv); BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue, -- cgit v1.2.3