Hi all, This is a bit different version of fsverity for XFS from one Darrick sent last time. This is mostly a half-baked prototype, sending this out to get feedback/suggesting/discuss on a design. If you think this approach would be fine and I can go further with polishing it. I haven't done anything to repair/scrub yet, haven't tested how old xattr leaf would work with this changes, and fsverity doesn't work with block size != page size yet... The reasoning for iomap interface is that it could possibly be used for other page cache related processing like fscrypt, compression. Cutting a few more regions for those. The attributes design is well described in design doc. This patchset consists of four parts: 1. Design document which describes directly mappped xattr data (dxattr) and how fsverity uses it 2. Patchset with iomap_read_region()/iomap_write_region() interface to write beyond EOF 3. Patchset implementing dxattr interface 4. Patchset implementing fsverity using dxattr. Using a xattr per merkle tree block, not using da tree address space. Thanks Andrey -- 2.47.0
