The qmp monitor command to mirror a disk was passing -1 for size along with the disk's backing file. This size of the resulting disk is the size of the backing file, which is incorrect if the disk has been resized. Therefore we should always pass in the size of the current disk.
Signed-off-by: Vishvananda Ishaya <vishvana...@gmail.com> --- Fixes https://bugs.launchpad.net/qemu/+bug/1103903 blockdev.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/blockdev.c b/blockdev.c index 9126587..bb63162 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1259,11 +1259,11 @@ void qmp_drive_mirror(const char *device, const char *target, return; } + bdrv_get_geometry(bs, &size); + size *= 512; if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) { /* create new image w/o backing file */ assert(format && drv); - bdrv_get_geometry(bs, &size); - size *= 512; bdrv_img_create(target, format, NULL, NULL, NULL, size, flags, &local_err); } else { @@ -1276,7 +1276,7 @@ void qmp_drive_mirror(const char *device, const char *target, bdrv_img_create(target, format, source->filename, source->drv->format_name, - NULL, -1, flags, &local_err); + NULL, size, flags, &local_err); break; default: abort(); -- 1.7.9.5
