From f13eb2055ae46ded52961f27753c245dc5b8967d Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 6 Feb 2017 10:42:26 -0800 Subject: 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 Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong --- fs/xfs/xfs_iomap.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'fs/xfs/xfs_iomap.h') diff --git a/fs/xfs/xfs_iomap.h b/fs/xfs/xfs_iomap.h index 705224b66b6a..00db3ecea084 100644 --- a/fs/xfs/xfs_iomap.h +++ b/fs/xfs/xfs_iomap.h @@ -33,6 +33,26 @@ void xfs_bmbt_to_iomap(struct xfs_inode *, struct iomap *, struct xfs_bmbt_irec *); xfs_extlen_t xfs_eof_alignment(struct xfs_inode *ip, xfs_extlen_t extsize); +static inline xfs_filblks_t +xfs_aligned_fsb_count( + xfs_fileoff_t offset_fsb, + xfs_filblks_t count_fsb, + xfs_extlen_t extsz) +{ + if (extsz) { + xfs_extlen_t align; + + align = do_mod(offset_fsb, extsz); + if (align) + count_fsb += align; + align = do_mod(count_fsb, extsz); + if (align) + count_fsb += extsz - align; + } + + return count_fsb; +} + extern const struct iomap_ops xfs_iomap_ops; extern const struct iomap_ops xfs_xattr_iomap_ops; -- cgit v1.2.3