Hi all, The scrub media error reporting could use some improvements -- first, scrub can calculate the exact offset of media errors in file mappings, so we should report more precise offsets. Second, we only need to scan the rmap once after assembling the io error bitmap to look for destroyed metadata (instead of once per error!). Third, we can filter out unwritten and attr/cow fork extents from what we report since sector remapping takes care of unwritten/cow extents and attr media errors should be detected by phase 3. Finally, we introduce a new category of errors that are unfixable by scrub, and assign to this class all the media errors since there's nothing XFS can do. If you're going to start using this mess, you probably ought to just pull from my git trees, which are linked below. This is an extraordinary way to destroy everything. Enjoy! Comments and questions are, as always, welcome. --D xfsprogs git tree: https://git.kernel.org/cgit/linux/kernel/git/djwong/xfsprogs-dev.git/log/?h=scrub-media-error-reporting fstests git tree: https://git.kernel.org/cgit/linux/kernel/git/djwong/xfstests-dev.git/log/?h=scrub-media-error-reporting
