New code for 6.10:

  * Online Repair
  ** Implement atomic file content exchanges i.e. exchange ranges of bytes
     between two files atomically.
  ** Create temporary files to repair file-based metadata. This uses atomic
     file content exchange facility to swap file fork mappings between the
     temporary file and the metadata inode.
  ** Allow callers of directory/xattr code to set an explicit owner number to
     be written into the header fields of any new blocks that are created.
     This is required to avoid walking every block of the new structure and
     modify their ownership during online repair.
  ** Repair
     - Extended attributes
     - Inode unlinked state
     - Directories.
     - Symbolic links.
     - Errors in AGI's unlinked inode list.
  ** Move Orphan files to lost and found directory.
  ** Fixes for Inode repair functionality.
  ** Introduce a new sub-AG FITRIM implementation to reduce the duration for
     which the AGF lock is held.
  ** Updates for the design documentation.

  * Fixes
  ** Fix sparse warnings

  * Cleanups
  ** Hold inode locks on all files involved in a rename until the completion
     of the operation. This is in preparation for the upcoming parent pointers
     patchset where parent pointers are applied in a separate chained update
     from the actual directory update.

  * Misc
  ** Improve performance of log incompat feature handling.

Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
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