Provide a command to dump checksums from 'btrfs inspect-internal'. This command does a lookup for the given file's extents via FIEMAP (which is handy as it already skips holes) and walks the checksum tree printing all checksums of an extent.
It is tested against different layouts of files with and without holes, but further testing done by others is highly appreciated. It is also available on github @ https://github.com/morbidrsa/btrfs-progs/tree/inspect-csums As this feature set will be used in upcomming fstests test cases, which will serve as regression tests around the checksum tree I, I decided that no standalone tests in btrfs-progs are needed. Changes since v2: * Cleanups per Nikolay Changes since v1: * Reworked error path's per Sun's comments * Misc cleanups per Nikolay's comments * Factored out super block reading from load_and_dump_sb() to be re-usable, also per Nikolay Changes since RFC: * Complete re-write using ioctl()s (FIEMAP and BTRFS_TREE_SEARCH_V2) to gather the extent and checksum informtion, as per David's (private) comment. * Re-named btrfs_lookup_csum() as per Qu's comment. Johannes Thumshirn (3): btrfs-progs: factor out super_block reading from load_and_dump_sb btrfs-progs: add 'btrfs inspect-internal csum-dump' command btrfs-progs: completion: wire-up dump-csum Makefile | 3 +- btrfs-completion | 4 +- cmds-inspect-dump-csum.c | 238 ++++++++++++++++++++++++++++++++++++++++++++++ cmds-inspect-dump-super.c | 15 ++- cmds-inspect.c | 2 + commands.h | 2 + utils.c | 15 +++ utils.h | 2 + 8 files changed, 269 insertions(+), 12 deletions(-) create mode 100644 cmds-inspect-dump-csum.c -- 2.16.4
