Re: [PATCH 0/3] btrfs-progs: make check handle invalid bg items

On Wed, Aug 18, 2021 at 12:39:19AM -0400, Josef Bacik wrote:

Hello,

While writing code for extent tree v2 I noticed that I was generating a fs with
an invalid block group ->used value.  However fsck wasn't catching this, because
we don't actuall check the used value of the block group items in normal mode.
lowmem mode does this properly thankfully, so this only needs to be added to the
normal fsck mode.

I've added code to btrfs-corrupt-block to generate the corrupt image I need for
the test case.  Then of course the actual patch to detect and fix the problem.
Thanks,

Josef

Josef Bacik (3):
  btrfs-progs: add the ability to corrupt block group items
  btrfs-progs: make check detect and fix invalid used for block groups
  btrfs-progs: add a test image with a corrupt block group item

Please use prefixes for the "subsystems" that get changed like

btrfs-progs: corrupt-block: add ability to corrupt block group items
btrfs-progs: check: detect and fix invalid used for block groups
btrfs-progs: tests: add image with a corrupt block group item

Series added to devel, thanks.