xfs: introduce xfs_aligned_fsb_count
Factor a helper to calculate the extent-size aligned block out of the
iomap code, so that it can be reused by the upcoming reflink dio code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 52d9d1f..06bfc82 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -162,7 +162,7 @@ xfs_iomap_write_direct(
xfs_fileoff_t last_fsb;
xfs_filblks_t count_fsb, resaligned;
xfs_fsblock_t firstfsb;
- xfs_extlen_t extsz, temp;
+ xfs_extlen_t extsz;
int nimaps;
int quota_flag;
int rt;
@@ -203,14 +203,7 @@ xfs_iomap_write_direct(
}
count_fsb = last_fsb - offset_fsb;
ASSERT(count_fsb > 0);
-
- resaligned = count_fsb;
- if (unlikely(extsz)) {
- if ((temp = do_mod(offset_fsb, extsz)))
- resaligned += temp;
- if ((temp = do_mod(resaligned, extsz)))
- resaligned += extsz - temp;
- }
+ resaligned = xfs_aligned_fsb_count(offset_fsb, count_fsb, extsz);
if (unlikely(rt)) {
resrtextents = qblocks = resaligned;