v6.12

• subvolume delete: add new option to do recursive subvolume deletion (for regular user delete only accessible subvolumes)
• mkfs:
  • new option --subvol to create subvolumes in given paths, read-write, read-only and default
  • add hard link detection support for --rootdir option
• fixes:
  • receive: message verbosity fixes
  • check: fix false positive report of missing checksum for extent holes
  • check: handle compressed extents when checking tree log
  • when asking Y/N user questions, flush the terminal so the question is displayed (e.g. btrfstune -S)
• other
  • code refactoring, error handling
  • python packaging fixes
  • documentation updates
  • new tests

v6.11

• check:
  • check items in tree-log
  • detect invalid file extent items for symlinks
  • properly detect inode cache and suggest removal by 'clear-ino-cache'
• convert: fix symlink length checks
• fi show: remove stray newline at the end of the output
• fixes:
  • open devices in write-exclusive mode in most commands, prevent
    concurrent mount by other programs
  • rescue clear-ino-cache: fix subvolume iteration that can fail in some cases
  • map-logical: fix first extent searching condition
  • fi resize: warn if new size is below 256M
• tree-checker:
  • slightly stricter file type validation
  • verify device extent items
• other:
  • documentation updates
  • ship btrfs-ioctl manual page (incomplete)

v6.10.1

• mkfs: rework --rootdir traversal, skip hardlinks and create new inodes
  instead, also warn about them, this did not work as expected and will be
  fixed in the future
• receive: search in older trees for UUIDs when detecting clone sources
• libbtrfsutil: bindings available at https://pypi.org/project/btrfsutil
• libbtrfs:
  • patchlevel version update 0.1.4
  • cleanup in headers, removed unused definitions, no functional changes
  • don't ship list.h and rbtree.h
• other:
  • documentation updates

v6.10

• inspect:
  • list-chunks: new command to print information about chunks (i.e. the physical chunks as stored on devices), sortable; requires root as it's using SEARCH_TREE ioctl
  • tree-stats:
    • new option -t to print only the given tree
    • add long options for size units
• filesystem df: with increased verbosity print per-type information from sysfs
• version: print a line with built-in features or options (+FEATURE1 -FEATURE2)
• image: document option -s and its potential problems
• fixes:
  • scrub status: user selected base for Rate values
  • receive: escape special characters in paths and xattrs
  • dump-tree: escape special characters in paths and xattrs
  • image: sanitizing filenames did not work properly in all cases
  • convert: fix displayed restored image path on rollback
  • tune change csum: do conversion in smaller batches
• other:
  • CI workflows updates (sanitizers, code spelling, manual page preview)
  • build fixes for uClibc
  • build fix for python 3.13
  • documentation updates

v6.9.2

• subvol list: fix accidental trimming of subvolume name
• check: revert checking file extent item 'ram_bytes'
• libbtrfsutil:
  • patchlevel version update 1.3.2
  • fix accidentally closing fd passed to subvolume iterator

v6.9.1 - do not use

• fix detection of intermediate super block flags (e.g. csum change and other conversions)
• raid-stripe-tree support (still experimental):
  • moved under experimental build flags (mkfs, convert)
  • format change, removed encoding type; backward incompatible
• receive dump: escape special chars in xattr names and values, and clone source path
• tune change csum: fix reservation size when starting a transaction
• other:
  • new and updated tests
  • updated CI images, new reference build targets
  • cleanups and refactoring

v6.9

• mkfs:
  • if --force used, don't continue if the mount status cannot be determined (e.g. due to permissions)
  • fix minimum size calculation on zoned devices, make it work with option -b
• check:
  • option --clear-ino-cache removed (functionality still provided in 'rescue' command group)
  • detect and repair wrong file extent item ram_bytes value
• qgroup clear-stale:
  • sync the filesystem before search to read the up to date state
  • handle cases where qgroup cannot be deleted due to uncleaned subvolume or when squota is enabled
• qgroup show: display status of qgroup regarding the cleaning of the subvolume or if it's squota
• receive: fix stream parsing on strict alignment hosts (e.g. ARM v5 or v6)
• tune change-csum: fix check of dev-replace status item, continue if no dev-replace in progress
• dump-tree: print contents of dev-replace status item
• convert: fix extent iteration to handle prealloc/unwritten extents
• libbtrfsutil:
  • patchlevel version update 1.3.1
  • fix potentially unaligned access to send stream
  • create library links to all version levels
• libbtrfs:
  • patchlevel version update 0.1.3
  • fix potentially unaligned access to send stream
  • create library links to all version levels
• build:
  • fix compatibility with e2fsprogs 1.47.1
  • fix header file dependency tracking
  • -O2 by default
• other:
  • new and updated tests
  • ASAN and UBSAN test coverage in CI
  • documentation updates

v6.8.1

• mkfs: fix writing on zoned device when block-group-tree is selected
• tune: fix writing on zoned device with option --convert-to-block-group-tree
• check:
  • more progress and error messages
  • unify handling of unknown command line options with other commands
• subvolume delete: remove options --delete-qgroup and --no-delete-qgroup (added in 6.6.3), qgroup deletion does not always work due to delayed background processing of subvolume or set value in sysfs:ggroup/drop_subtree_threshold
• other:
  • misc refactoring
  • error handling fixes reported by gcc -fanalyzer
  • documentation updates
  • new and updated tests

v6.8

• fix --enqueue option timeout handling
• subvolume: remove support for undocumented options -c and -x, functionality disabled in kernel
• libbtrfsutil:
  • version 0.1.3, backward compabile
  • add aliases for all existing functions with unified naming scheme
  • updated header defintions for recently added kernel features
• send: v3 supported in experimental mode
• other:
  • docs: manual page references, graphs, enhancements, clarifications
  • error handling fixes
  • cleanups and refactoring

v6.7.1

• convert: raid-stripe-tree can be now enabled for the target filesystem
• mkfs:
  • handle lifetime of open file descriptors so it does not trigger udev that could miss to create the UUID symlinks in /dev
  • update warning when CPU page size does not match sector size
  • merge features in summary, no more distinction of incompat and runtime to match the semantics of option -O
• fi show: fix recognizing raw device mapper paths
• other:
  • CI updates, build images updates
  • minor cleanups
  • minor sync with kernel
  • documentation updates, fix links to labels in included directories