Hi, This series makes qemu-img info print the extent size of an image file (if available). To do so, we have to do a couple of things: 1. Add a .bdrv_get_specific_info handler to the file-posix driver (patch 4) 2. Have bdrv_query_image_info() collect this driver-specific info not only on the format level, but also on the protocol level (if there is an unambiguous node) so we actually get the information from the file-posix node when querying whatever format node is on top (patch 2) 3. Have bdrv_image_info_dump() print this protocol-level information (patch 3)
Extent size informations seems unavailable on ext4 at least, so if we did just this, you would see the following for an image on ext4: ``` $ qemu-img info -f raw test.img image: test.img file format: raw virtual size: 1 MiB (1048576 bytes) disk size: 4 KiB Protocol specific information: ``` That last part looks a bit strange -- it's a heading without a section. So patch 1 makes bdrv_image_info_specific_dump() omit that heading if there is no information that can be printed. Hanna Reitz (4): block: Improve empty format-specific info dump block: Add protocol-specific image info block: Print protocol-specific information block/file: Add file-specific image info qapi/block-core.json | 32 ++++++++++++++++++++-- include/block/qapi.h | 3 +- block/file-posix.c | 30 ++++++++++++++++++++ block/qapi.c | 65 +++++++++++++++++++++++++++++++++++++++++--- qemu-io-cmds.c | 4 +-- 5 files changed, 124 insertions(+), 10 deletions(-) -- 2.35.1
