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TODO.md

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TODO

Stability fixes

  • audit error handling of pwrite/pread, transaction commits and general error propagation

Core

  • finish search API

  • use search v2 (conditionally compiled, verify correctness)

  • review error level of messages

  • add missing error messages

  • review information in error messages, add missing numbers, information or clarify if needed

  • image dump format v2, finish and move out of experimental

  • do quick heuristic during defrag, either by file type, use libmagic/file

  • FUSE module, read-only first, read-write optional

  • add more injection points, use that in tests for specific critical points

User interface

  • forced chunk allocation; do safety checks

  • fi du with compression, like compsize

  • (not sure) file extent map, something like filefrag or xfs_io fiemap, including compressed extents and device layout (RAID levels);

  • merge btrfstune to main tool, needs the subcommand hierarchy defined

  • add inspect-internal command to scan filesystem for incompat features (compression, trees, block group types)

  • (not sure) file deduplication, basic support, among a set of a few files, not to duplicate duperemove

  • advanced inspection, e.g. device span on the physical device with offsets

  • optional user:group map for send/receive

  • subvol delete sync add options to trigger sync for each or until the last is cleaned

  • more verbose resize, print physical offsets of occupied blocks

  • resize also the underlying block device

  • add benchmark group, with compression, checksums, maybe heuristic

  • option to explain balance filters

  • send/receive use file descriptor with KTLS (pipe, socket)

  • merge other standalone tools to main tool, select-super to rescue?, map-logical to inspect?

  • filesystem resize with automatic resize of the underlying device if applicable

  • replace with a smaller device (needs kernel support)

mkfs.btrfs

  • add options for more fine grained device specification, like size, slack

  • integrate verity records (issue NNN)

btrfs-convert

  • convert from xfs

Tests

  • add and verify test assumptions that are not covered in general, e.g. feature support

  • add tests for internal APIs to the extent that is used, and more

  • add a common test result output (TAP, xunit)

User documentation

  • add examples to the end of each page, show most common commands, or show some interesting combinations

Developer documentation

  • internal APIs

  • image dump format, v1, v2

3rd party tool integration

  • strace can print the ioctl structures, update upstream

  • review status of bootloaders, add systemd-boot or others that support btrfs

Other, new, unsorted

Unless there's a good place to put a new entry, add it here. Link any related issue #123.
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