diff options
author | Darrick J. Wong <djwong@kernel.org> | 2023-10-16 18:37:07 +0200 |
---|---|---|
committer | Darrick J. Wong <djwong@kernel.org> | 2023-10-18 01:24:22 +0200 |
commit | 5dc3a80d46a450481df7f7e9fe673ba3eb4514c3 (patch) | |
tree | de8d5c6d78a0fb032d39ffbc73d59a8e12776549 /fs | |
parent | xfs: create a helper to convert extlen to rtextlen (diff) | |
download | linux-5dc3a80d46a450481df7f7e9fe673ba3eb4514c3.tar.xz linux-5dc3a80d46a450481df7f7e9fe673ba3eb4514c3.zip |
xfs: create helpers to convert rt block numbers to rt extent numbers
Create helpers to do unit conversions of rt block numbers to rt extent
numbers. There are three variations -- one to compute the rt extent
number from an rt block number; one to compute the offset of an rt block
within an rt extent; and one to extract both.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/xfs/libxfs/xfs_bmap.c | 8 | ||||
-rw-r--r-- | fs/xfs/libxfs/xfs_rtbitmap.c | 4 | ||||
-rw-r--r-- | fs/xfs/libxfs/xfs_rtbitmap.h | 31 |
3 files changed, 37 insertions, 6 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index 19203699b992..fc96aa59a691 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -5276,7 +5276,6 @@ __xfs_bunmapi( int tmp_logflags; /* partial logging flags */ int wasdel; /* was a delayed alloc extent */ int whichfork; /* data or attribute fork */ - xfs_fsblock_t sum; xfs_filblks_t len = *rlen; /* length to unmap in file */ xfs_fileoff_t end; struct xfs_iext_cursor icur; @@ -5371,8 +5370,8 @@ __xfs_bunmapi( if (!isrt) goto delete; - sum = del.br_startblock + del.br_blockcount; - div_u64_rem(sum, mp->m_sb.sb_rextsize, &mod); + mod = xfs_rtb_to_rtxoff(mp, + del.br_startblock + del.br_blockcount); if (mod) { /* * Realtime extent not lined up at the end. @@ -5419,7 +5418,8 @@ __xfs_bunmapi( goto error0; goto nodelete; } - div_u64_rem(del.br_startblock, mp->m_sb.sb_rextsize, &mod); + + mod = xfs_rtb_to_rtxoff(mp, del.br_startblock); if (mod) { xfs_extlen_t off = mp->m_sb.sb_rextsize - mod; diff --git a/fs/xfs/libxfs/xfs_rtbitmap.c b/fs/xfs/libxfs/xfs_rtbitmap.c index f64e4aeb393b..383c6437e042 100644 --- a/fs/xfs/libxfs/xfs_rtbitmap.c +++ b/fs/xfs/libxfs/xfs_rtbitmap.c @@ -1024,13 +1024,13 @@ xfs_rtfree_blocks( ASSERT(rtlen <= XFS_MAX_BMBT_EXTLEN); - len = div_u64_rem(rtlen, mp->m_sb.sb_rextsize, &mod); + len = xfs_rtb_to_rtxrem(mp, rtlen, &mod); if (mod) { ASSERT(mod == 0); return -EIO; } - start = div_u64_rem(rtbno, mp->m_sb.sb_rextsize, &mod); + start = xfs_rtb_to_rtxrem(mp, rtbno, &mod); if (mod) { ASSERT(mod == 0); return -EIO; diff --git a/fs/xfs/libxfs/xfs_rtbitmap.h b/fs/xfs/libxfs/xfs_rtbitmap.h index e2a36fc157c4..9df583083407 100644 --- a/fs/xfs/libxfs/xfs_rtbitmap.h +++ b/fs/xfs/libxfs/xfs_rtbitmap.h @@ -39,6 +39,37 @@ xfs_extlen_to_rtxlen( return len / mp->m_sb.sb_rextsize; } +/* Convert an rt block number into an rt extent number. */ +static inline xfs_rtxnum_t +xfs_rtb_to_rtx( + struct xfs_mount *mp, + xfs_rtblock_t rtbno) +{ + return div_u64(rtbno, mp->m_sb.sb_rextsize); +} + +/* Return the offset of an rt block number within an rt extent. */ +static inline xfs_extlen_t +xfs_rtb_to_rtxoff( + struct xfs_mount *mp, + xfs_rtblock_t rtbno) +{ + return do_div(rtbno, mp->m_sb.sb_rextsize); +} + +/* + * Crack an rt block number into an rt extent number and an offset within that + * rt extent. Returns the rt extent number directly and the offset in @off. + */ +static inline xfs_rtxnum_t +xfs_rtb_to_rtxrem( + struct xfs_mount *mp, + xfs_rtblock_t rtbno, + xfs_extlen_t *off) +{ + return div_u64_rem(rtbno, mp->m_sb.sb_rextsize, off); +} + /* * Functions for walking free space rtextents in the realtime bitmap. */ |