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authorKevin Wolf <kwolf@redhat.com>2013-03-28 15:29:24 +0100
committerKevin Wolf <kwolf@redhat.com>2013-04-22 10:27:59 +0200
commit31ca6d077c24b7aaa322d8930e3e5debbdb4a047 (patch)
tree81974b0ff7bd37ca4493b0c4f95556adaab2f1f0 /block
parent2af5ef70af9fdc823407ddc4ae14766806d4837a (diff)
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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 <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'block')
-rw-r--r--block/mirror.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/mirror.c b/block/mirror.c
index a62ad86..8b07dec 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -507,7 +507,7 @@ static void mirror_complete(BlockJob *job, Error **errp)
MirrorBlockJob *s = container_of(job, MirrorBlockJob, common);
int ret;
- ret = bdrv_open_backing_file(s->target);
+ ret = bdrv_open_backing_file(s->target, NULL);
if (ret < 0) {
char backing_filename[PATH_MAX];
bdrv_get_full_backing_filename(s->target, backing_filename,