[PATCH 6/7] xfs: create rt extent rounding helpers for realtime extent blocks

["Darrick J. Wong" <djwong@xxxxxxxxxx>]

From: Darrick J. Wong <djwong@xxxxxxxxxx>

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

Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
 fs/xfs/libxfs/xfs_rtbitmap.h |   18 ++++++++++++++++++
 fs/xfs/xfs_bmap_util.c       |    8 +++-----
 fs/xfs/xfs_rtalloc.c         |    4 ++--
 fs/xfs/xfs_xchgrange.c       |    4 ++--
 4 files changed, 25 insertions(+), 9 deletions(-)


diff --git a/fs/xfs/libxfs/xfs_rtbitmap.h b/fs/xfs/libxfs/xfs_rtbitmap.h
index bdd4858a794c2..bc51d3bfc7c45 100644
--- a/fs/xfs/libxfs/xfs_rtbitmap.h
+++ b/fs/xfs/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.
  */
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 8f1e16e49dab2..b17332b84812e 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -685,7 +685,7 @@ xfs_can_free_eofblocks(
 	 */
 	end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_ISIZE(ip));
 	if (XFS_IS_REALTIME_INODE(ip) && mp->m_sb.sb_rextsize > 1)
-		end_fsb = roundup_64(end_fsb, mp->m_sb.sb_rextsize);
+		end_fsb = xfs_rtb_roundup_rtx(mp, end_fsb);
 	last_fsb = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
 	if (last_fsb <= end_fsb)
 		return false;
@@ -984,10 +984,8 @@ xfs_free_file_space(
 
 	/* We can only free complete realtime extents. */
 	if (xfs_inode_has_bigrtextents(ip)) {
-		startoffset_fsb = roundup_64(startoffset_fsb,
-					     mp->m_sb.sb_rextsize);
-		endoffset_fsb = rounddown_64(endoffset_fsb,
-					     mp->m_sb.sb_rextsize);
+		startoffset_fsb = xfs_rtb_roundup_rtx(mp, startoffset_fsb);
+		endoffset_fsb = xfs_rtb_rounddown_rtx(mp, endoffset_fsb);
 	}
 
 	/*
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index 8db8f957a683b..e62ca51b995ba 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -1633,8 +1633,8 @@ xfs_rtfile_convert_unwritten(
 	if (mp->m_sb.sb_rextsize == 1)
 		return 0;
 
-	off = rounddown_64(XFS_B_TO_FSBT(mp, pos), mp->m_sb.sb_rextsize);
-	endoff = roundup_64(XFS_B_TO_FSB(mp, pos + len), mp->m_sb.sb_rextsize);
+	off = xfs_rtb_rounddown_rtx(mp, XFS_B_TO_FSBT(mp, pos));
+	endoff = xfs_rtb_roundup_rtx(mp, XFS_B_TO_FSB(mp, pos + len));
 
 	trace_xfs_rtfile_convert_unwritten(ip, pos, len);
 
diff --git a/fs/xfs/xfs_xchgrange.c b/fs/xfs/xfs_xchgrange.c
index befa915089ce6..a4a352e027c97 100644
--- a/fs/xfs/xfs_xchgrange.c
+++ b/fs/xfs/xfs_xchgrange.c
@@ -28,6 +28,7 @@
 #include "xfs_icache.h"
 #include "xfs_log.h"
 #include "xfs_rtalloc.h"
+#include "xfs_rtbitmap.h"
 #include <linux/fsnotify.h>
 
 /*
@@ -1236,8 +1237,7 @@ xfs_xchg_range(
 	 * offsets and length in @fxr are safe to round up.
 	 */
 	if (XFS_IS_REALTIME_INODE(ip2))
-		req.blockcount = roundup_64(req.blockcount,
-					    mp->m_sb.sb_rextsize);
+		req.blockcount = xfs_rtb_roundup_rtx(mp, req.blockcount);
 
 	error = xfs_xchg_range_estimate(&req);
 	if (error)