This is 8th version of patch adding compare subcommand that compares two images. Compare has following criteria: - only data part is compared - unallocated sectors are not read - in case of different image size, exceeding part of bigger disk has to be zeroed/unallocated to compare rest - qemu-img returns: - 0 if images are identical - 1 if images differ - 2 on error
v8: - minor grammar fixes (no behavior change) v7: - split patch into pieces - Quiet mode added for all relevant subcommands - check non-shared part of disk after shared one - minor docummentation and naming fixes v6: - added handling -?, -h options for compare subcommand v5 (only minor changes): - removed redundant comment - removed dead code (goto after help()) - set final total_sectors on first assignment v4: - Fixed various typos - Added functions for empty sector check and sector-to-bytes offset conversion - Fixed command-line parameters processing v3: - options -f/-F are orthogonal - documentation updated to new syntax and behavior - used byte offset instead of sector number for output v2: - changed option for second image format to -F - changed handling of -f and -F [1] - added strict mode (-s) - added quiet mode (-q) - improved output messages [2] - rename variables for larger image handling - added man page content Signed-off-by: Miroslav Rezanina <mreza...@redhat.com> Miroslav Rezanina (4): block: Add synchronous wrapper for bdrv_co_is_allocated_above qemu-img: Add "Quiet mode" option qemu-img: Add compare subcommand Add qemu-img compare documentation block.c | 51 ++++++- blockdev.c | 6 +- include/block/block.h | 5 +- qemu-img-cmds.hx | 34 +++-- qemu-img.c | 381 +++++++++++++++++++++++++++++++++++++++++++++---- qemu-img.texi | 35 +++++ 6 files changed, 461 insertions(+), 51 deletions(-)