[PATCH v1 0/4] ntfs: fix MFT bitmap extension allocation

[Xuewen Wang]

This series fixes four bugs in the MFT bitmap extension path:

  - The adjacent-cluster candidate can be outside the volume. Check it
    before accessing $Bitmap and fall back to the regular allocator.
  - The allocator can return an adjacent cluster that merges with the
    existing run. Preserve that run when rolling back a failed extension.
  - Rollback can wait for the initial $Bitmap scan while holding a folio
    the scanner needs. Wait for the scan before starting the allocation.
  - Direct allocation changes $Bitmap without updating the cached free
    counts. Update both counts and honor per-page accounting and space
    reserved for delayed allocation. 

Xuewen Wang (4):
  ntfs: bound the adjacent cluster in MFT bitmap extension
  ntfs: fix rollback after MFT bitmap run coalescing
  ntfs: wait for the bitmap scan before MFT bitmap extension
  ntfs: account for direct MFT bitmap cluster allocation

 fs/ntfs/mft.c | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

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2.25.1