[PATCH v5 for-5.0? 0/7] Tighten qemu-img rules on missing backing format

v4 was here: https://lists.gnu.org/archive/html/qemu-devel/2020-03/msg03775.html In v5: - fix 'qemu-img convert -B' to actually warn [Kashyap] - squash in followups - a couple more iotest improvements If we decide this is not 5.0 material, then patches 4 and 7 need a tweak to s/5.0/5.1/ as the start of the deprecation clock. Eric Blake (7): sheepdog: Add trivial backing_fmt support vmdk: Add trivial backing_fmt support qcow: Tolerate backing_fmt=, but warn on backing_fmt=raw qcow2: Deprecate use of qemu-img amend to change backing file iotests: Specify explicit backing format where sensible block: Add support to warn on backing file change without format qemu-img: Deprecate use of -b without -F docs/system/deprecated.rst | 32 ++++++++++++++++ docs/tools/qemu-img.rst | 4 ++ include/block/block.h | 4 +- block.c | 34 +++++++++++++++-- block/qcow.c | 16 +++++++- block/qcow2.c | 7 +++- block/sheepdog.c | 18 ++++++++- block/stream.c | 2 +- block/vmdk.c | 14 +++++++ blockdev.c | 3 +- qemu-img.c | 11 +++++- tests/qemu-iotests/017 | 2 +- tests/qemu-iotests/017.out | 2 +- tests/qemu-iotests/018 | 2 +- tests/qemu-iotests/018.out | 2 +- tests/qemu-iotests/019 | 5 ++- tests/qemu-iotests/019.out | 2 +- tests/qemu-iotests/020 | 4 +- tests/qemu-iotests/020.out | 4 +- tests/qemu-iotests/024 | 8 ++-- tests/qemu-iotests/024.out | 5 ++- tests/qemu-iotests/028 | 4 +- tests/qemu-iotests/028.out | 2 +- tests/qemu-iotests/030 | 26 +++++++++---- tests/qemu-iotests/034 | 2 +- tests/qemu-iotests/034.out | 2 +- tests/qemu-iotests/037 | 2 +- tests/qemu-iotests/037.out | 2 +- tests/qemu-iotests/038 | 2 +- tests/qemu-iotests/038.out | 2 +- tests/qemu-iotests/039 | 3 +- tests/qemu-iotests/039.out | 2 +- tests/qemu-iotests/040 | 47 ++++++++++++++++------- tests/qemu-iotests/041 | 37 ++++++++++++------ tests/qemu-iotests/042 | 4 +- tests/qemu-iotests/043 | 18 ++++----- tests/qemu-iotests/043.out | 16 +++++--- tests/qemu-iotests/046 | 2 +- tests/qemu-iotests/046.out | 2 +- tests/qemu-iotests/050 | 4 +- tests/qemu-iotests/050.out | 2 +- tests/qemu-iotests/051 | 2 +- tests/qemu-iotests/051.out | 2 +- tests/qemu-iotests/051.pc.out | 2 +- tests/qemu-iotests/056 | 3 +- tests/qemu-iotests/060 | 2 +- tests/qemu-iotests/060.out | 2 +- tests/qemu-iotests/061 | 10 ++--- tests/qemu-iotests/061.out | 11 +++--- tests/qemu-iotests/069 | 2 +- tests/qemu-iotests/069.out | 2 +- tests/qemu-iotests/073 | 2 +- tests/qemu-iotests/073.out | 2 +- tests/qemu-iotests/082 | 10 +++-- tests/qemu-iotests/082.out | 14 ++++--- tests/qemu-iotests/085 | 4 +- tests/qemu-iotests/085.out | 6 +-- tests/qemu-iotests/089 | 2 +- tests/qemu-iotests/089.out | 2 +- tests/qemu-iotests/095 | 4 +- tests/qemu-iotests/095.out | 4 +- tests/qemu-iotests/097 | 4 +- tests/qemu-iotests/097.out | 16 ++++---- tests/qemu-iotests/098 | 2 +- tests/qemu-iotests/098.out | 8 ++-- tests/qemu-iotests/110 | 4 +- tests/qemu-iotests/110.out | 4 +- tests/qemu-iotests/114 | 12 ++++++ tests/qemu-iotests/114.out | 9 +++++ tests/qemu-iotests/122 | 27 +++++++------ tests/qemu-iotests/122.out | 8 ++-- tests/qemu-iotests/126 | 4 +- tests/qemu-iotests/126.out | 4 +- tests/qemu-iotests/127 | 4 +- tests/qemu-iotests/127.out | 4 +- tests/qemu-iotests/129 | 3 +- tests/qemu-iotests/133 | 2 +- tests/qemu-iotests/133.out | 2 +- tests/qemu-iotests/139 | 2 +- tests/qemu-iotests/141 | 4 +- tests/qemu-iotests/141.out | 4 +- tests/qemu-iotests/142 | 2 +- tests/qemu-iotests/142.out | 2 +- tests/qemu-iotests/153 | 14 +++---- tests/qemu-iotests/153.out | 35 +++++++++-------- tests/qemu-iotests/154 | 42 ++++++++++---------- tests/qemu-iotests/154.out | 42 ++++++++++---------- tests/qemu-iotests/155 | 12 ++++-- tests/qemu-iotests/156 | 9 +++-- tests/qemu-iotests/156.out | 6 +-- tests/qemu-iotests/158 | 2 +- tests/qemu-iotests/158.out | 2 +- tests/qemu-iotests/161 | 8 ++-- tests/qemu-iotests/161.out | 8 ++-- tests/qemu-iotests/176 | 4 +- tests/qemu-iotests/176.out | 32 ++++++++-------- tests/qemu-iotests/177 | 2 +- tests/qemu-iotests/177.out | 2 +- tests/qemu-iotests/179 | 2 +- tests/qemu-iotests/179.out | 2 +- tests/qemu-iotests/189 | 2 +- tests/qemu-iotests/189.out | 2 +- tests/qemu-iotests/191 | 12 +++--- tests/qemu-iotests/191.out | 12 +++--- tests/qemu-iotests/195 | 6 +-- tests/qemu-iotests/195.out | 6 +-- tests/qemu-iotests/198 | 2 +- tests/qemu-iotests/198.out | 3 +- tests/qemu-iotests/204 | 2 +- tests/qemu-iotests/204.out | 2 +- tests/qemu-iotests/216 | 2 +- tests/qemu-iotests/224 | 4 +- tests/qemu-iotests/225 | 2 +- tests/qemu-iotests/225.out | 2 +- tests/qemu-iotests/228 | 5 ++- tests/qemu-iotests/245 | 3 +- tests/qemu-iotests/249 | 4 +- tests/qemu-iotests/249.out | 4 +- tests/qemu-iotests/252 | 2 +- tests/qemu-iotests/257 | 3 +- tests/qemu-iotests/267 | 4 +- tests/qemu-iotests/267.out | 6 +-- tests/qemu-iotests/270 | 2 +- tests/qemu-iotests/270.out | 2 +- tests/qemu-iotests/273 | 4 +- tests/qemu-iotests/273.out | 4 +- tests/qemu-iotests/279 | 4 +- tests/qemu-iotests/279.out | 4 +- tests/qemu-iotests/290 | 72 +++++++++++++++++++++++++++++++++++ tests/qemu-iotests/290.out | 45 ++++++++++++++++++++++ tests/qemu-iotests/group | 1 + 131 files changed, 683 insertions(+), 350 deletions(-) create mode 100755 tests/qemu-iotests/290 create mode 100644 tests/qemu-iotests/290.out -- 2.26.0.rc2