The backing.file.filename option is not working as expected: if there's also a backing file name from the format driver, adding this option fails bdrv_open; if there's no backing file name info in the image, "info block" doesn't show the overrided file name.
A test case is updated to catch these issues. Fam Zheng (2): block: fix backing file overriding qemu-iotests: add test for backing file overriding block.c | 7 +++++-- tests/qemu-iotests/051 | 17 ++++++++++++++++- tests/qemu-iotests/051.out | 11 +++++++++++ 3 files changed, 32 insertions(+), 3 deletions(-) -- 1.8.3.1