diff options
| author | John Garry <john.g.garry@oracle.com> | 2025-05-07 14:18:27 -0700 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2025-05-07 14:25:31 -0700 |
| commit | 6baf4cc47a741024d37e6149d5d035d3fc9ed1fe (patch) | |
| tree | 52c9de6ed95c22e61ef4fac27164822d878a1515 /fs/xfs/libxfs/xfs_bmap.c | |
| parent | 85bf2dfa3f1287d349fa1f92b673ca67d13c7784 (diff) | |
xfs: allow block allocator to take an alignment hint
Add a BMAPI flag to provide a hint to the block allocator to align extents
according to the extszhint.
This will be useful for atomic writes to ensure that we are not being
allocated extents which are not suitable (for atomic writes).
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: John Garry <john.g.garry@oracle.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_bmap.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_bmap.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index 63255820b58a..d954f9b8071f 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -3312,6 +3312,11 @@ xfs_bmap_compute_alignments( align = xfs_get_cowextsz_hint(ap->ip); else if (ap->datatype & XFS_ALLOC_USERDATA) align = xfs_get_extsz_hint(ap->ip); + + /* Try to align start block to any minimum allocation alignment */ + if (align > 1 && (ap->flags & XFS_BMAPI_EXTSZALIGN)) + args->alignment = align; + if (align) { if (xfs_bmap_extsize_align(mp, &ap->got, &ap->prev, align, 0, ap->eof, 0, ap->conv, &ap->offset, |