ntfs: fix rollback after MFT bitmap run coalescing

After the direct allocation attempt drops lcnbmp_lock, a concurrent free
can let ntfs_cluster_alloc() return the adjacent cluster. The merged
runlist then extends the existing last run, but rollback assumes a new
run was added. A later metadata failure removes the old mapping and
frees its first cluster.

Record whether the allocated cluster is adjacent before merging the
runlists. On rollback, shorten a coalesced run by one cluster and free
only that cluster; remove the new run for a non-adjacent allocation.

Suggested-by: Baolin Liu <liubaolin@kylinos.cn>
Reviewed-by: Baolin Liu <liubaolin@kylinos.cn>
Signed-off-by: Xuewen Wang <wangxuewen@kylinos.cn>
Reviewed-by: Baolin Liu <liubaolin@kylinos.cn>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

0 files changed, 0 insertions, 0 deletions