[07/10] xfs: create rt extent rounding helpers for realtime extent blocks

Commit Message

Darrick J. Wong Dec. 30, 2022, 10:19 p.m. UTC

From: Darrick J. Wong <[e-mail]>

Create a pair of functions to round rtblock numbers up or down to the
nearest rt extent.

Signed-off-by: Darrick J. Wong <[e-mail]>
---
 libfrog/div64.h       |   14 ++++++++++++++
 libxfs/libxfs_priv.h  |    8 --------
 libxfs/xfs_rtbitmap.h |   18 ++++++++++++++++++
 3 files changed, 32 insertions(+), 8 deletions(-)

Patch

diff --git a/libfrog/div64.h b/libfrog/div64.h
index 265487916fc..9317b28aad4 100644
--- a/libfrog/div64.h
+++ b/libfrog/div64.h
@@ -66,4 +66,18 @@  div64_u64_rem(uint64_t dividend, uint64_t divisor, uint64_t *remainder)
 	return dividend / divisor;
 }
 
+static inline uint64_t rounddown_64(uint64_t x, uint32_t y)
+{
+	do_div(x, y);
+	return x * y;
+}
+
+static inline uint64_t
+roundup_64(uint64_t x, uint32_t y)
+{
+	x += y - 1;
+	do_div(x, y);
+	return x * y;
+}
+
 #endif /* LIBFROG_DIV64_H_ */
diff --git a/libxfs/libxfs_priv.h b/libxfs/libxfs_priv.h
index 49441ac787f..71abfdbe401 100644
--- a/libxfs/libxfs_priv.h
+++ b/libxfs/libxfs_priv.h
@@ -363,14 +363,6 @@  roundup_pow_of_two(uint v)
 	return 0;
 }
 
-static inline uint64_t
-roundup_64(uint64_t x, uint32_t y)
-{
-	x += y - 1;
-	do_div(x, y);
-	return x * y;
-}
-
 static inline uint64_t
 howmany_64(uint64_t x, uint32_t y)
 {
diff --git a/libxfs/xfs_rtbitmap.h b/libxfs/xfs_rtbitmap.h
index bdd4858a794..bc51d3bfc7c 100644
--- a/libxfs/xfs_rtbitmap.h
+++ b/libxfs/xfs_rtbitmap.h
@@ -56,6 +56,24 @@  xfs_rtb_to_rtxt(
 	return div_u64(rtbno, mp->m_sb.sb_rextsize);
 }
 
+/* Round this rtblock up to the nearest rt extent size. */
+static inline xfs_rtblock_t
+xfs_rtb_roundup_rtx(
+	struct xfs_mount	*mp,
+	xfs_rtblock_t		rtbno)
+{
+	return roundup_64(rtbno, mp->m_sb.sb_rextsize);
+}
+
+/* Round this rtblock down to the nearest rt extent size. */
+static inline xfs_rtblock_t
+xfs_rtb_rounddown_rtx(
+	struct xfs_mount	*mp,
+	xfs_rtblock_t		rtbno)
+{
+	return rounddown_64(rtbno, mp->m_sb.sb_rextsize);
+}
+
 /*
  * Functions for walking free space rtextents in the realtime bitmap.
  */