Merge tag 'for-6.17-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs updates from David Sterba:
 "A number of usability and feature updates, scattered performance
  improvements and fixes. Highlight of the core changes is getting
  closer to enabling large folios (now behind a config option).

  User visible changes:

   - update defrag ioctl, add new flag to request no compression on
     existing extents

   - restrict writes to block devices after mount

   - in experimental config, enable large folios for data, almost
     complete but not widely tested

   - add stats tracking duration of critical section in transaction
     commit to /sys/fs/btrfs/FSID/commit_stats

  Performance improvements:

   - caching of lookup results of free space bitmap (20% runtime
     improvement on an empty file creation benchmark)

   - accessors to metadata (b-tree items) simplified and optimized,
     minor improvement in metadata-heavy workloads

   - readahead on compressed data improves sequential read

   - the xarray for extent buffers is indexed by denser keys, leading to
     better packing of the nodes (50-70% reduction of leaf nodes)

  Notable fixes:

   - stricter compression mount option parsing

   - send properly emits fallocate command for file holes when protocol
     v2 is used

   - fix overallocation of chunks with mount option 'ssd_spread', due to
     interaction with size classes not finding the right chunk
     (workaround: manual reclaim by 'usage' balance filter)

   - various quota enable/disable races with rescan, more verbose
     notifications about inconsistent state

   - populate otime in tree-log during log replay

   - handle ENOSPC when NOCOW file is used with mmap()

  Core:

   - large data folios enabled in experimental config

   - improved error handling, transaction abort call sites

   - in zoned mode, allocate reloc block group on mount to make sure
     there's always one available for zone reclaim under heavy load

   - rework device opening, they're always open as read-only and delayed
     until the super block is created, allowing the restricted writes
     after mount

   - preparatory work for adding blk_holder_ops, allowing device
     freeze/thaw in the future

  Cleanups, refactoring:

   - type and naming unifications (int/bool, return variables)

   - rb-tree helper refactoring and simplifications

   - reorder memory allocations to less critical places

   - RCU string (used for device name) refactoring and API removal

   - replace all remaining use of strcpy()"

* tag 'for-6.17-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (209 commits)
  btrfs: send: use fallocate for hole punching with send stream v2
  btrfs: unfold transaction aborts when writing dirty block groups
  btrfs: use saner variable type and name to indicate extrefs at add_inode_ref()
  btrfs: don't skip remaining extrefs if dir not found during log replay
  btrfs: don't ignore inode missing when replaying log tree
  btrfs: enable large data folios for data reloc inode
  btrfs: output more info when btrfs_subpage_assert() failed
  btrfs: reloc: unconditionally invalidate the page cache for each cluster
  btrfs: defrag: add flag to force no-compression
  btrfs: fix ssd_spread overallocation
  btrfs: zoned: requeue to unused block group list if zone finish failed
  btrfs: zoned: do not remove unwritten non-data block group
  btrfs: remove btrfs_clear_extent_bits()
  btrfs: use cached state when falling back from NOCoW write to CoW write
  btrfs: set EXTENT_NORESERVE before range unlock in btrfs_truncate_block()
  btrfs: don't print relocation messages from auto reclaim
  btrfs: remove redundant auto reclaim log message
  btrfs: make btrfs_check_nocow_lock() check more than one extent
  btrfs: assert we can NOCOW the range in btrfs_truncate_block()
  btrfs: update function comment for btrfs_check_nocow_lock()
  ...