Merging upstream version 6.7.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

53 files changed, 1684 insertions, 1093 deletions

diff --git a/fs/xfs/Kconfig b/fs/xfs/Kconfig
index ed0bc8cbc7..567fb37274 100644
--- a/fs/xfs/Kconfig
+++ b/fs/xfs/Kconfig
@@ -147,7 +147,7 @@ config XFS_ONLINE_SCRUB_STATS
 	bool "XFS online metadata check usage data collection"
 	default y
 	depends on XFS_ONLINE_SCRUB
-	select XFS_DEBUG
+	select DEBUG_FS
 	help
 	  If you say Y here, the kernel will gather usage data about
 	  the online metadata check subsystem.  This includes the number
diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index 3069194527..100ab5931b 100644
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -2275,16 +2275,37 @@ xfs_alloc_min_freelist(
 
 	ASSERT(mp->m_alloc_maxlevels > 0);
 
+	/*
+	 * For a btree shorter than the maximum height, the worst case is that
+	 * every level gets split and a new level is added, then while inserting
+	 * another entry to refill the AGFL, every level under the old root gets
+	 * split again. This is:
+	 *
+	 *   (full height split reservation) + (AGFL refill split height)
+	 * = (current height + 1) + (current height - 1)
+	 * = (new height) + (new height - 2)
+	 * = 2 * new height - 2
+	 *
+	 * For a btree of maximum height, the worst case is that every level
+	 * under the root gets split, then while inserting another entry to
+	 * refill the AGFL, every level under the root gets split again. This is
+	 * also:
+	 *
+	 *   2 * (current height - 1)
+	 * = 2 * (new height - 1)
+	 * = 2 * new height - 2
+	 */
+
 	/* space needed by-bno freespace btree */
 	min_free = min_t(unsigned int, levels[XFS_BTNUM_BNOi] + 1,
-				       mp->m_alloc_maxlevels);
+				       mp->m_alloc_maxlevels) * 2 - 2;
 	/* space needed by-size freespace btree */
 	min_free += min_t(unsigned int, levels[XFS_BTNUM_CNTi] + 1,
-				       mp->m_alloc_maxlevels);
+				       mp->m_alloc_maxlevels) * 2 - 2;
 	/* space needed reverse mapping used space btree */
 	if (xfs_has_rmapbt(mp))
 		min_free += min_t(unsigned int, levels[XFS_BTNUM_RMAPi] + 1,
-						mp->m_rmap_maxlevels);
+						mp->m_rmap_maxlevels) * 2 - 2;
 
 	return min_free;
 }
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index 30c931b388..be62acffad 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -21,7 +21,7 @@
 #include "xfs_bmap.h"
 #include "xfs_bmap_util.h"
 #include "xfs_bmap_btree.h"
-#include "xfs_rtalloc.h"
+#include "xfs_rtbitmap.h"
 #include "xfs_errortag.h"
 #include "xfs_error.h"
 #include "xfs_quota.h"
@@ -2989,7 +2989,7 @@ xfs_bmap_extsize_align(
 	 * If realtime, and the result isn't a multiple of the realtime
 	 * extent size we need to remove blocks until it is.
 	 */
-	if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) {
+	if (rt && (temp = xfs_extlen_to_rtxmod(mp, align_alen))) {
 		/*
 		 * We're not covering the original request, or
 		 * we won't be able to once we fix the length.
@@ -3016,7 +3016,7 @@ xfs_bmap_extsize_align(
 		else {
 			align_alen -= orig_off - align_off;
 			align_off = orig_off;
-			align_alen -= align_alen % mp->m_sb.sb_rextsize;
+			align_alen -= xfs_extlen_to_rtxmod(mp, align_alen);
 		}
 		/*
 		 * Result doesn't cover the request, fail it.
@@ -4826,12 +4826,8 @@ xfs_bmap_del_extent_delay(
 	ASSERT(got->br_startoff <= del->br_startoff);
 	ASSERT(got_endoff >= del_endoff);
 
-	if (isrt) {
-		uint64_t rtexts = XFS_FSB_TO_B(mp, del->br_blockcount);
-
-		do_div(rtexts, mp->m_sb.sb_rextsize);
-		xfs_mod_frextents(mp, rtexts);
-	}
+	if (isrt)
+		xfs_mod_frextents(mp, xfs_rtb_to_rtx(mp, del->br_blockcount));
 
 	/*
 	 * Update the inode delalloc counter now and wait to update the
@@ -5057,33 +5053,20 @@ xfs_bmap_del_extent_real(
 
 	flags = XFS_ILOG_CORE;
 	if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) {
-		xfs_filblks_t	len;
-		xfs_extlen_t	mod;
-
-		len = div_u64_rem(del->br_blockcount, mp->m_sb.sb_rextsize,
-				  &mod);
-		ASSERT(mod == 0);
-
 		if (!(bflags & XFS_BMAPI_REMAP)) {
-			xfs_fsblock_t	bno;
-
-			bno = div_u64_rem(del->br_startblock,
-					mp->m_sb.sb_rextsize, &mod);
-			ASSERT(mod == 0);
-
-			error = xfs_rtfree_extent(tp, bno, (xfs_extlen_t)len);
+			error = xfs_rtfree_blocks(tp, del->br_startblock,
+					del->br_blockcount);
 			if (error)
 				goto done;
 		}
 
 		do_fx = 0;
-		nblks = len * mp->m_sb.sb_rextsize;
 		qfield = XFS_TRANS_DQ_RTBCOUNT;
 	} else {
 		do_fx = 1;
-		nblks = del->br_blockcount;
 		qfield = XFS_TRANS_DQ_BCOUNT;
 	}
+	nblks = del->br_blockcount;
 
 	del_endblock = del->br_startblock + del->br_blockcount;
 	if (cur) {
@@ -5289,7 +5272,6 @@ __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;
@@ -5384,8 +5366,8 @@ __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.
@@ -5432,7 +5414,8 @@ __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;
 
@@ -6209,8 +6192,8 @@ xfs_bmap_validate_extent(
 		return __this_address;
 
 	if (XFS_IS_REALTIME_INODE(ip) && whichfork == XFS_DATA_FORK) {
-		if (!xfs_verify_rtext(mp, irec->br_startblock,
-					  irec->br_blockcount))
+		if (!xfs_verify_rtbext(mp, irec->br_startblock,
+					   irec->br_blockcount))
 			return __this_address;
 	} else {
 		if (!xfs_verify_fsbext(mp, irec->br_startblock,
diff --git a/fs/xfs/libxfs/xfs_defer.c b/fs/xfs/libxfs/xfs_defer.c
index bcfb6a4203..f71679ce23 100644
--- a/fs/xfs/libxfs/xfs_defer.c
+++ b/fs/xfs/libxfs/xfs_defer.c
@@ -245,21 +245,18 @@ xfs_defer_create_intents(
 	return ret;
 }
 
-/* Abort all the intents that were committed. */
 STATIC void
-xfs_defer_trans_abort(
-	struct xfs_trans		*tp,
-	struct list_head		*dop_pending)
+xfs_defer_pending_abort(
+	struct xfs_mount		*mp,
+	struct list_head		*dop_list)
 {
 	struct xfs_defer_pending	*dfp;
 	const struct xfs_defer_op_type	*ops;
 
-	trace_xfs_defer_trans_abort(tp, _RET_IP_);
-
 	/* Abort intent items that don't have a done item. */
-	list_for_each_entry(dfp, dop_pending, dfp_list) {
+	list_for_each_entry(dfp, dop_list, dfp_list) {
 		ops = defer_op_types[dfp->dfp_type];
-		trace_xfs_defer_pending_abort(tp->t_mountp, dfp);
+		trace_xfs_defer_pending_abort(mp, dfp);
 		if (dfp->dfp_intent && !dfp->dfp_done) {
 			ops->abort_intent(dfp->dfp_intent);
 			dfp->dfp_intent = NULL;
@@ -267,6 +264,16 @@ xfs_defer_trans_abort(
 	}
 }
 
+/* Abort all the intents that were committed. */
+STATIC void
+xfs_defer_trans_abort(
+	struct xfs_trans		*tp,
+	struct list_head		*dop_pending)
+{
+	trace_xfs_defer_trans_abort(tp, _RET_IP_);
+	xfs_defer_pending_abort(tp->t_mountp, dop_pending);
+}
+
 /*
  * Capture resources that the caller said not to release ("held") when the
  * transaction commits.  Caller is responsible for zero-initializing @dres.
@@ -756,12 +763,13 @@ xfs_defer_ops_capture(
 
 /* Release all resources that we used to capture deferred ops. */
 void
-xfs_defer_ops_capture_free(
+xfs_defer_ops_capture_abort(
 	struct xfs_mount		*mp,
 	struct xfs_defer_capture	*dfc)
 {
 	unsigned short			i;
 
+	xfs_defer_pending_abort(mp, &dfc->dfc_dfops);
 	xfs_defer_cancel_list(mp, &dfc->dfc_dfops);
 
 	for (i = 0; i < dfc->dfc_held.dr_bufs; i++)
@@ -802,7 +810,7 @@ xfs_defer_ops_capture_and_commit(
 	/* Commit the transaction and add the capture structure to the list. */
 	error = xfs_trans_commit(tp);
 	if (error) {
-		xfs_defer_ops_capture_free(mp, dfc);
+		xfs_defer_ops_capture_abort(mp, dfc);
 		return error;
 	}
 
diff --git a/fs/xfs/libxfs/xfs_defer.h b/fs/xfs/libxfs/xfs_defer.h
index 114a3a4930..8788ad5f6a 100644
--- a/fs/xfs/libxfs/xfs_defer.h
+++ b/fs/xfs/libxfs/xfs_defer.h
@@ -121,7 +121,7 @@ int xfs_defer_ops_capture_and_commit(struct xfs_trans *tp,
 		struct list_head *capture_list);
 void xfs_defer_ops_continue(struct xfs_defer_capture *d, struct xfs_trans *tp,
 		struct xfs_defer_resources *dres);
-void xfs_defer_ops_capture_free(struct xfs_mount *mp,
+void xfs_defer_ops_capture_abort(struct xfs_mount *mp,
 		struct xfs_defer_capture *d);
 void xfs_defer_resources_rele(struct xfs_defer_resources *dres);
 
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index 371dc07233..9a88aba158 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -98,7 +98,7 @@ typedef struct xfs_sb {
 	uint32_t	sb_blocksize;	/* logical block size, bytes */
 	xfs_rfsblock_t	sb_dblocks;	/* number of data blocks */
 	xfs_rfsblock_t	sb_rblocks;	/* number of realtime blocks */
-	xfs_rtblock_t	sb_rextents;	/* number of realtime extents */
+	xfs_rtbxlen_t	sb_rextents;	/* number of realtime extents */
 	uuid_t		sb_uuid;	/* user-visible file system unique id */
 	xfs_fsblock_t	sb_logstart;	/* starting block of log if internal */
 	xfs_ino_t	sb_rootino;	/* root inode number */
@@ -691,6 +691,22 @@ struct xfs_agfl {
 		   xfs_daddr_to_agno(mp, (d) + (len) - 1)))
 
 /*
+ * Realtime bitmap information is accessed by the word, which is currently
+ * stored in host-endian format.
+ */
+union xfs_rtword_raw {
+	__u32		old;
+};
+
+/*
+ * Realtime summary counts are accessed by the word, which is currently
+ * stored in host-endian format.
+ */
+union xfs_suminfo_raw {
+	__u32		old;
+};
+
+/*
  * XFS Timestamps
  * ==============
  *
@@ -1142,24 +1158,10 @@ static inline bool xfs_dinode_has_large_extent_counts(
 
 #define	XFS_BLOCKSIZE(mp)	((mp)->m_sb.sb_blocksize)
 #define	XFS_BLOCKMASK(mp)	((mp)->m_blockmask)
-#define	XFS_BLOCKWSIZE(mp)	((mp)->m_blockwsize)
-#define	XFS_BLOCKWMASK(mp)	((mp)->m_blockwmask)
 
 /*
- * RT Summary and bit manipulation macros.
+ * RT bit manipulation macros.
  */
-#define	XFS_SUMOFFS(mp,ls,bb)	((int)((ls) * (mp)->m_sb.sb_rbmblocks + (bb)))
-#define	XFS_SUMOFFSTOBLOCK(mp,s)	\
-	(((s) * (uint)sizeof(xfs_suminfo_t)) >> (mp)->m_sb.sb_blocklog)
-#define	XFS_SUMPTR(mp,bp,so)	\
-	((xfs_suminfo_t *)((bp)->b_addr + \
-		(((so) * (uint)sizeof(xfs_suminfo_t)) & XFS_BLOCKMASK(mp))))
-
-#define	XFS_BITTOBLOCK(mp,bi)	((bi) >> (mp)->m_blkbit_log)
-#define	XFS_BLOCKTOBIT(mp,bb)	((bb) << (mp)->m_blkbit_log)
-#define	XFS_BITTOWORD(mp,bi)	\
-	((int)(((bi) >> XFS_NBWORDLOG) & XFS_BLOCKWMASK(mp)))
-
 #define	XFS_RTMIN(a,b)	((a) < (b) ? (a) : (b))
 #define	XFS_RTMAX(a,b)	((a) > (b) ? (a) : (b))
 
diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
index a35781577c..137a65bda9 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.c
+++ b/fs/xfs/libxfs/xfs_inode_buf.c
@@ -220,8 +220,10 @@ xfs_inode_from_disk(
 	 * a time before epoch is converted to a time long after epoch
 	 * on 64 bit systems.
 	 */
-	inode->i_atime = xfs_inode_from_disk_ts(from, from->di_atime);
-	inode->i_mtime = xfs_inode_from_disk_ts(from, from->di_mtime);
+	inode_set_atime_to_ts(inode,
+			      xfs_inode_from_disk_ts(from, from->di_atime));
+	inode_set_mtime_to_ts(inode,
+			      xfs_inode_from_disk_ts(from, from->di_mtime));
 	inode_set_ctime_to_ts(inode,
 			      xfs_inode_from_disk_ts(from, from->di_ctime));
 
@@ -315,8 +317,8 @@ xfs_inode_to_disk(
 	to->di_projid_lo = cpu_to_be16(ip->i_projid & 0xffff);
 	to->di_projid_hi = cpu_to_be16(ip->i_projid >> 16);
 
-	to->di_atime = xfs_inode_to_disk_ts(ip, inode->i_atime);
-	to->di_mtime = xfs_inode_to_disk_ts(ip, inode->i_mtime);
+	to->di_atime = xfs_inode_to_disk_ts(ip, inode_get_atime(inode));
+	to->di_mtime = xfs_inode_to_disk_ts(ip, inode_get_mtime(inode));
 	to->di_ctime = xfs_inode_to_disk_ts(ip, inode_get_ctime(inode));
 	to->di_nlink = cpu_to_be32(inode->i_nlink);
 	to->di_gen = cpu_to_be32(inode->i_generation);
@@ -508,6 +510,9 @@ xfs_dinode_verify(
 	if (mode && nextents + naextents > nblocks)
 		return __this_address;
 
+	if (nextents + naextents == 0 && nblocks != 0)
+		return __this_address;
+
 	if (S_ISDIR(mode) && nextents > mp->m_dir_geo->max_extents)
 		return __this_address;
 
diff --git a/fs/xfs/libxfs/xfs_rtbitmap.c b/fs/xfs/libxfs/xfs_rtbitmap.c
index fa180ab66b..c269d70431 100644
--- a/fs/xfs/libxfs/xfs_rtbitmap.c
+++ b/fs/xfs/libxfs/xfs_rtbitmap.c
@@ -16,6 +16,7 @@
 #include "xfs_trans.h"
 #include "xfs_rtalloc.h"
 #include "xfs_error.h"
+#include "xfs_rtbitmap.h"
 
 /*
  * Realtime allocator bitmap functions shared with userspace.
@@ -46,25 +47,69 @@ const struct xfs_buf_ops xfs_rtbuf_ops = {
 	.verify_write = xfs_rtbuf_verify_write,
 };
 
+/* Release cached rt bitmap and summary buffers. */
+void
+xfs_rtbuf_cache_relse(
+	struct xfs_rtalloc_args	*args)
+{
+	if (args->rbmbp) {
+		xfs_trans_brelse(args->tp, args->rbmbp);
+		args->rbmbp = NULL;
+		args->rbmoff = NULLFILEOFF;
+	}
+	if (args->sumbp) {
+		xfs_trans_brelse(args->tp, args->sumbp);
+		args->sumbp = NULL;
+		args->sumoff = NULLFILEOFF;
+	}
+}
+
 /*
  * Get a buffer for the bitmap or summary file block specified.
  * The buffer is returned read and locked.
  */
 int
 xfs_rtbuf_get(
-	xfs_mount_t	*mp,		/* file system mount structure */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_rtblock_t	block,		/* block number in bitmap or summary */
-	int		issum,		/* is summary not bitmap */
-	struct xfs_buf	**bpp)		/* output: buffer for the block */
+	struct xfs_rtalloc_args	*args,
+	xfs_fileoff_t		block,	/* block number in bitmap or summary */
+	int			issum)	/* is summary not bitmap */
 {
-	struct xfs_buf	*bp;		/* block buffer, result */
-	xfs_inode_t	*ip;		/* bitmap or summary inode */
-	xfs_bmbt_irec_t	map;
-	int		nmap = 1;
-	int		error;		/* error value */
+	struct xfs_mount	*mp = args->mp;
+	struct xfs_buf		**cbpp;	/* cached block buffer */
+	xfs_fileoff_t		*coffp;	/* cached block number */
+	struct xfs_buf		*bp;	/* block buffer, result */
+	struct xfs_inode	*ip;	/* bitmap or summary inode */
+	struct xfs_bmbt_irec	map;
+	enum xfs_blft		type;
+	int			nmap = 1;
+	int			error;
 
-	ip = issum ? mp->m_rsumip : mp->m_rbmip;
+	if (issum) {
+		cbpp = &args->sumbp;
+		coffp = &args->sumoff;
+		ip = mp->m_rsumip;
+		type = XFS_BLFT_RTSUMMARY_BUF;
+	} else {
+		cbpp = &args->rbmbp;
+		coffp = &args->rbmoff;
+		ip = mp->m_rbmip;
+		type = XFS_BLFT_RTBITMAP_BUF;
+	}
+
+	/*
+	 * If we have a cached buffer, and the block number matches, use that.
+	 */
+	if (*cbpp && *coffp == block)
+		return 0;
+
+	/*
+	 * Otherwise we have to have to get the buffer.  If there was an old
+	 * one, get rid of it first.
+	 */
+	if (*cbpp) {
+		xfs_trans_brelse(args->tp, *cbpp);
+		*cbpp = NULL;
+	}
 
 	error = xfs_bmapi_read(ip, block, 1, &map, &nmap, 0);
 	if (error)
@@ -74,15 +119,15 @@ xfs_rtbuf_get(
 		return -EFSCORRUPTED;
 
 	ASSERT(map.br_startblock != NULLFSBLOCK);
-	error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
+	error = xfs_trans_read_buf(mp, args->tp, mp->m_ddev_targp,
 				   XFS_FSB_TO_DADDR(mp, map.br_startblock),
 				   mp->m_bsize, 0, &bp, &xfs_rtbuf_ops);
 	if (error)
 		return error;
 
-	xfs_trans_buf_set_type(tp, bp, issum ? XFS_BLFT_RTSUMMARY_BUF
-					     : XFS_BLFT_RTBITMAP_BUF);
-	*bpp = bp;
+	xfs_trans_buf_set_type(args->tp, bp, type);
+	*cbpp = bp;
+	*coffp = block;
 	return 0;
 }
 
@@ -92,47 +137,44 @@ xfs_rtbuf_get(
  */
 int
 xfs_rtfind_back(
-	xfs_mount_t	*mp,		/* file system mount point */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_rtblock_t	start,		/* starting block to look at */
-	xfs_rtblock_t	limit,		/* last block to look at */
-	xfs_rtblock_t	*rtblock)	/* out: start block found */
+	struct xfs_rtalloc_args	*args,
+	xfs_rtxnum_t		start,	/* starting rtext to look at */
+	xfs_rtxnum_t		limit,	/* last rtext to look at */
+	xfs_rtxnum_t		*rtx)	/* out: start rtext found */
 {
-	xfs_rtword_t	*b;		/* current word in buffer */
-	int		bit;		/* bit number in the word */
-	xfs_rtblock_t	block;		/* bitmap block number */
-	struct xfs_buf	*bp;		/* buf for the block */
-	xfs_rtword_t	*bufp;		/* starting word in buffer */
-	int		error;		/* error value */
-	xfs_rtblock_t	firstbit;	/* first useful bit in the word */
-	xfs_rtblock_t	i;		/* current bit number rel. to start */
-	xfs_rtblock_t	len;		/* length of inspected area */
-	xfs_rtword_t	mask;		/* mask of relevant bits for value */
-	xfs_rtword_t	want;		/* mask for "good" values */
-	xfs_rtword_t	wdiff;		/* difference from wanted value */
-	int		word;		/* word number in the buffer */
+	struct xfs_mount	*mp = args->mp;
+	int			bit;	/* bit number in the word */
+	xfs_fileoff_t		block;	/* bitmap block number */
+	int			error;	/* error value */
+	xfs_rtxnum_t		firstbit; /* first useful bit in the word */
+	xfs_rtxnum_t		i;	/* current bit number rel. to start */
+	xfs_rtxnum_t		len;	/* length of inspected area */
+	xfs_rtword_t		mask;	/* mask of relevant bits for value */
+	xfs_rtword_t		want;	/* mask for "good" values */
+	xfs_rtword_t		wdiff;	/* difference from wanted value */
+	xfs_rtword_t		incore;
+	unsigned int		word;	/* word number in the buffer */
 
 	/*
 	 * Compute and read in starting bitmap block for starting block.
 	 */
-	block = XFS_BITTOBLOCK(mp, start);
-	error = xfs_rtbuf_get(mp, tp, block, 0, &bp);
-	if (error) {
+	block = xfs_rtx_to_rbmblock(mp, start);
+	error = xfs_rtbitmap_read_buf(args, block);
+	if (error)
 		return error;
-	}
-	bufp = bp->b_addr;
+
 	/*
 	 * Get the first word's index & point to it.
 	 */
-	word = XFS_BITTOWORD(mp, start);
-	b = &bufp[word];
+	word = xfs_rtx_to_rbmword(mp, start);
 	bit = (int)(start & (XFS_NBWORD - 1));
 	len = start - limit + 1;
 	/*
 	 * Compute match value, based on the bit at start: if 1 (free)
 	 * then all-ones, else all-zeroes.
 	 */
-	want = (*b & ((xfs_rtword_t)1 << bit)) ? -1 : 0;
+	incore = xfs_rtbitmap_getword(args, word);
+	want = (incore & ((xfs_rtword_t)1 << bit)) ? -1 : 0;
 	/*
 	 * If the starting position is not word-aligned, deal with the
 	 * partial word.
@@ -149,13 +191,12 @@ xfs_rtfind_back(
 		 * Calculate the difference between the value there
 		 * and what we're looking for.
 		 */
-		if ((wdiff = (*b ^ want) & mask)) {
+		if ((wdiff = (incore ^ want) & mask)) {
 			/*
 			 * Different.  Mark where we are and return.
 			 */
-			xfs_trans_brelse(tp, bp);
 			i = bit - XFS_RTHIBIT(wdiff);
-			*rtblock = start - i + 1;
+			*rtx = start - i + 1;
 			return 0;
 		}
 		i = bit - firstbit + 1;
@@ -167,19 +208,11 @@ xfs_rtfind_back(
 			/*
 			 * If done with this block, get the previous one.
 			 */
-			xfs_trans_brelse(tp, bp);
-			error = xfs_rtbuf_get(mp, tp, --block, 0, &bp);
-			if (error) {
+			error = xfs_rtbitmap_read_buf(args, --block);
+			if (error)
 				return error;
-			}
-			bufp = bp->b_addr;
-			word = XFS_BLOCKWMASK(mp);
-			b = &bufp[word];
-		} else {
-			/*
-			 * Go on to the previous word in the buffer.
-			 */
-			b--;
+
+			word = mp->m_blockwsize - 1;
 		}
 	} else {
 		/*
@@ -195,13 +228,13 @@ xfs_rtfind_back(
 		/*
 		 * Compute difference between actual and desired value.
 		 */
-		if ((wdiff = *b ^ want)) {
+		incore = xfs_rtbitmap_getword(args, word);
+		if ((wdiff = incore ^ want)) {
 			/*
 			 * Different, mark where we are and return.
 			 */
-			xfs_trans_brelse(tp, bp);
 			i += XFS_NBWORD - 1 - XFS_RTHIBIT(wdiff);
-			*rtblock = start - i + 1;
+			*rtx = start - i + 1;
 			return 0;
 		}
 		i += XFS_NBWORD;
@@ -213,19 +246,11 @@ xfs_rtfind_back(
 			/*
 			 * If done with this block, get the previous one.
 			 */
-			xfs_trans_brelse(tp, bp);
-			error = xfs_rtbuf_get(mp, tp, --block, 0, &bp);
-			if (error) {
+			error = xfs_rtbitmap_read_buf(args, --block);
+			if (error)
 				return error;
-			}
-			bufp = bp->b_addr;
-			word = XFS_BLOCKWMASK(mp);
-			b = &bufp[word];
-		} else {
-			/*
-			 * Go on to the previous word in the buffer.
-			 */
-			b--;
+
+			word = mp->m_blockwsize - 1;
 		}
 	}
 	/*
@@ -242,13 +267,13 @@ xfs_rtfind_back(
 		/*
 		 * Compute difference between actual and desired value.
 		 */
-		if ((wdiff = (*b ^ want) & mask)) {
+		incore = xfs_rtbitmap_getword(args, word);
+		if ((wdiff = (incore ^ want) & mask)) {
 			/*
 			 * Different, mark where we are and return.
 			 */
-			xfs_trans_brelse(tp, bp);
 			i += XFS_NBWORD - 1 - XFS_RTHIBIT(wdiff);
-			*rtblock = start - i + 1;
+			*rtx = start - i + 1;
 			return 0;
 		} else
 			i = len;
@@ -256,8 +281,7 @@ xfs_rtfind_back(
 	/*
 	 * No match, return that we scanned the whole area.
 	 */
-	xfs_trans_brelse(tp, bp);
-	*rtblock = start - i + 1;
+	*rtx = start - i + 1;
 	return 0;
 }
 
@@ -267,47 +291,44 @@ xfs_rtfind_back(
  */
 int
 xfs_rtfind_forw(
-	xfs_mount_t	*mp,		/* file system mount point */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_rtblock_t	start,		/* starting block to look at */
-	xfs_rtblock_t	limit,		/* last block to look at */
-	xfs_rtblock_t	*rtblock)	/* out: start block found */
+	struct xfs_rtalloc_args	*args,
+	xfs_rtxnum_t		start,	/* starting rtext to look at */
+	xfs_rtxnum_t		limit,	/* last rtext to look at */
+	xfs_rtxnum_t		*rtx)	/* out: start rtext found */
 {
-	xfs_rtword_t	*b;		/* current word in buffer */
-	int		bit;		/* bit number in the word */
-	xfs_rtblock_t	block;		/* bitmap block number */
-	struct xfs_buf	*bp;		/* buf for the block */
-	xfs_rtword_t	*bufp;		/* starting word in buffer */
-	int		error;		/* error value */
-	xfs_rtblock_t	i;		/* current bit number rel. to start */
-	xfs_rtblock_t	lastbit;	/* last useful bit in the word */
-	xfs_rtblock_t	len;		/* length of inspected area */
-	xfs_rtword_t	mask;		/* mask of relevant bits for value */
-	xfs_rtword_t	want;		/* mask for "good" values */
-	xfs_rtword_t	wdiff;		/* difference from wanted value */
-	int		word;		/* word number in the buffer */
+	struct xfs_mount	*mp = args->mp;
+	int			bit;	/* bit number in the word */
+	xfs_fileoff_t		block;	/* bitmap block number */
+	int			error;
+	xfs_rtxnum_t		i;	/* current bit number rel. to start */
+	xfs_rtxnum_t		lastbit;/* last useful bit in the word */
+	xfs_rtxnum_t		len;	/* length of inspected area */
+	xfs_rtword_t		mask;	/* mask of relevant bits for value */
+	xfs_rtword_t		want;	/* mask for "good" values */
+	xfs_rtword_t		wdiff;	/* difference from wanted value */
+	xfs_rtword_t		incore;
+	unsigned int		word;	/* word number in the buffer */
 
 	/*
 	 * Compute and read in starting bitmap block for starting block.
 	 */
-	block = XFS_BITTOBLOCK(mp, start);
-	error = xfs_rtbuf_get(mp, tp, block, 0, &bp);
-	if (error) {
+	block = xfs_rtx_to_rbmblock(mp, start);
+	error = xfs_rtbitmap_read_buf(args, block);
+	if (error)
 		return error;
-	}
-	bufp = bp->b_addr;
+
 	/*
 	 * Get the first word's index & point to it.
 	 */
-	word = XFS_BITTOWORD(mp, start);
-	b = &bufp[word];
+	word = xfs_rtx_to_rbmword(mp, start);
 	bit = (int)(start & (XFS_NBWORD - 1));
 	len = limit - start + 1;
 	/*
 	 * Compute match value, based on the bit at start: if 1 (free)
 	 * then all-ones, else all-zeroes.
 	 */
-	want = (*b & ((xfs_rtword_t)1 << bit)) ? -1 : 0;
+	incore = xfs_rtbitmap_getword(args, word);
+	want = (incore & ((xfs_rtword_t)1 << bit)) ? -1 : 0;
 	/*
 	 * If the starting position is not word-aligned, deal with the
 	 * partial word.
@@ -323,13 +344,12 @@ xfs_rtfind_forw(
 		 * Calculate the difference between the value there
 		 * and what we're looking for.
 		 */
-		if ((wdiff = (*b ^ want) & mask)) {
+		if ((wdiff = (incore ^ want) & mask)) {
 			/*
 			 * Different.  Mark where we are and return.
 			 */
-			xfs_trans_brelse(tp, bp);
 			i = XFS_RTLOBIT(wdiff) - bit;
-			*rtblock = start + i - 1;
+			*rtx = start + i - 1;
 			return 0;
 		}
 		i = lastbit - bit;
@@ -337,22 +357,15 @@ xfs_rtfind_forw(
 		 * Go on to next block if that's where the next word is
 		 * and we need the next word.
 		 */
-		if (++word == XFS_BLOCKWSIZE(mp) && i < len) {
+		if (++word == mp->m_blockwsize && i < len) {
 			/*
 			 * If done with this block, get the previous one.
 			 */
-			xfs_trans_brelse(tp, bp);
-			error = xfs_rtbuf_get(mp, tp, ++block, 0, &bp);
-			if (error) {
+			error = xfs_rtbitmap_read_buf(args, ++block);
+			if (error)
 				return error;
-			}
-			b = bufp = bp->b_addr;
+
 			word = 0;
-		} else {
-			/*
-			 * Go on to the previous word in the buffer.
-			 */
-			b++;
 		}
 	} else {
 		/*
@@ -368,13 +381,13 @@ xfs_rtfind_forw(
 		/*
 		 * Compute difference between actual and desired value.
 		 */
-		if ((wdiff = *b ^ want)) {
+		incore = xfs_rtbitmap_getword(args, word);
+		if ((wdiff = incore ^ want)) {
 			/*
 			 * Different, mark where we are and return.
 			 */
-			xfs_trans_brelse(tp, bp);
 			i += XFS_RTLOBIT(wdiff);
-			*rtblock = start + i - 1;
+			*rtx = start + i - 1;
 			return 0;
 		}
 		i += XFS_NBWORD;
@@ -382,22 +395,15 @@ xfs_rtfind_forw(
 		 * Go on to next block if that's where the next word is
 		 * and we need the next word.
 		 */
-		if (++word == XFS_BLOCKWSIZE(mp) && i < len) {
+		if (++word == mp->m_blockwsize && i < len) {
 			/*
 			 * If done with this block, get the next one.
 			 */
-			xfs_trans_brelse(tp, bp);
-			error = xfs_rtbuf_get(mp, tp, ++block, 0, &bp);
-			if (error) {
+			error = xfs_rtbitmap_read_buf(args, ++block);
+			if (error)
 				return error;
-			}
-			b = bufp = bp->b_addr;
+
 			word = 0;
-		} else {
-			/*
-			 * Go on to the next word in the buffer.
-			 */
-			b++;
 		}
 	}
 	/*
@@ -412,13 +418,13 @@ xfs_rtfind_forw(
 		/*
 		 * Compute difference between actual and desired value.
 		 */
-		if ((wdiff = (*b ^ want) & mask)) {
+		incore = xfs_rtbitmap_getword(args, word);
+		if ((wdiff = (incore ^ want) & mask)) {
 			/*
 			 * Different, mark where we are and return.
 			 */
-			xfs_trans_brelse(tp, bp);
 			i += XFS_RTLOBIT(wdiff);
-			*rtblock = start + i - 1;
+			*rtx = start + i - 1;
 			return 0;
 		} else
 			i = len;
@@ -426,11 +432,25 @@ xfs_rtfind_forw(
 	/*
 	 * No match, return that we scanned the whole area.
 	 */
-	xfs_trans_brelse(tp, bp);
-	*rtblock = start + i - 1;
+	*rtx = start + i - 1;
 	return 0;
 }
 
+/* Log rtsummary counter at @infoword. */
+static inline void
+xfs_trans_log_rtsummary(
+	struct xfs_rtalloc_args	*args,
+	unsigned int		infoword)
+{
+	struct xfs_buf		*bp = args->sumbp;
+	size_t			first, last;
+
+	first = (void *)xfs_rsumblock_infoptr(args, infoword) - bp->b_addr;
+	last = first + sizeof(xfs_suminfo_t) - 1;
+
+	xfs_trans_log_buf(args->tp, bp, first, last);
+}
+
 /*
  * Read and/or modify the summary information for a given extent size,
  * bitmap block combination.
@@ -442,86 +462,77 @@ xfs_rtfind_forw(
  */
 int
 xfs_rtmodify_summary_int(
-	xfs_mount_t	*mp,		/* file system mount structure */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	int		log,		/* log2 of extent size */
-	xfs_rtblock_t	bbno,		/* bitmap block number */
-	int		delta,		/* change to make to summary info */
-	struct xfs_buf	**rbpp,		/* in/out: summary block buffer */
-	xfs_fsblock_t	*rsb,		/* in/out: summary block number */
-	xfs_suminfo_t	*sum)		/* out: summary info for this block */
+	struct xfs_rtalloc_args	*args,
+	int			log,	/* log2 of extent size */
+	xfs_fileoff_t		bbno,	/* bitmap block number */
+	int			delta,	/* change to make to summary info */
+	xfs_suminfo_t		*sum)	/* out: summary info for this block */
 {
-	struct xfs_buf	*bp;		/* buffer for the summary block */
-	int		error;		/* error value */
-	xfs_fsblock_t	sb;		/* summary fsblock */
-	int		so;		/* index into the summary file */
-	xfs_suminfo_t	*sp;		/* pointer to returned data */
+	struct xfs_mount	*mp = args->mp;
+	int			error;
+	xfs_fileoff_t		sb;	/* summary fsblock */
+	xfs_rtsumoff_t		so;	/* index into the summary file */
+	unsigned int		infoword;
 
 	/*
 	 * Compute entry number in the summary file.
 	 */
-	so = XFS_SUMOFFS(mp, log, bbno);
+	so = xfs_rtsumoffs(mp, log, bbno);
 	/*
 	 * Compute the block number in the summary file.
 	 */
-	sb = XFS_SUMOFFSTOBLOCK(mp, so);
-	/*
-	 * If we have an old buffer, and the block number matches, use that.
-	 */
-	if (*rbpp && *rsb == sb)
-		bp = *rbpp;
-	/*
-	 * Otherwise we have to get the buffer.
-	 */
-	else {
-		/*
-		 * If there was an old one, get rid of it first.
-		 */
-		if (*rbpp)
-			xfs_trans_brelse(tp, *rbpp);
-		error = xfs_rtbuf_get(mp, tp, sb, 1, &bp);
-		if (error) {
-			return error;
-		}
-		/*
-		 * Remember this buffer and block for the next call.
-		 */
-		*rbpp = bp;
-		*rsb = sb;
-	}
+	sb = xfs_rtsumoffs_to_block(mp, so);
+
+	error = xfs_rtsummary_read_buf(args, sb);
+	if (error)
+		return error;
+
 	/*
 	 * Point to the summary information, modify/log it, and/or copy it out.
 	 */
-	sp = XFS_SUMPTR(mp, bp, so);
+	infoword = xfs_rtsumoffs_to_infoword(mp, so);
 	if (delta) {
-		uint first = (uint)((char *)sp - (char *)bp->b_addr);
+		xfs_suminfo_t	val = xfs_suminfo_add(args, infoword, delta);
 
-		*sp += delta;
 		if (mp->m_rsum_cache) {
-			if (*sp == 0 && log == mp->m_rsum_cache[bbno])
-				mp->m_rsum_cache[bbno]++;
-			if (*sp != 0 && log < mp->m_rsum_cache[bbno])
+			if (val == 0 && log + 1 == mp->m_rsum_cache[bbno])
 				mp->m_rsum_cache[bbno] = log;
+			if (val != 0 && log >= mp->m_rsum_cache[bbno])
+				mp->m_rsum_cache[bbno] = log + 1;
 		}
-		xfs_trans_log_buf(tp, bp, first, first + sizeof(*sp) - 1);
+		xfs_trans_log_rtsummary(args, infoword);
+		if (sum)
+			*sum = val;
+	} else if (sum) {
+		*sum = xfs_suminfo_get(args, infoword);
 	}
-	if (sum)
-		*sum = *sp;
 	return 0;
 }
 
 int
 xfs_rtmodify_summary(
-	xfs_mount_t	*mp,		/* file system mount structure */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	int		log,		/* log2 of extent size */
-	xfs_rtblock_t	bbno,		/* bitmap block number */
-	int		delta,		/* change to make to summary info */
-	struct xfs_buf	**rbpp,		/* in/out: summary block buffer */
-	xfs_fsblock_t	*rsb)		/* in/out: summary block number */
+	struct xfs_rtalloc_args	*args,
+	int			log,	/* log2 of extent size */
+	xfs_fileoff_t		bbno,	/* bitmap block number */
+	int			delta)	/* in/out: summary block number */
 {
-	return xfs_rtmodify_summary_int(mp, tp, log, bbno,
-					delta, rbpp, rsb, NULL);
+	return xfs_rtmodify_summary_int(args, log, bbno, delta, NULL);
+}
+
+/* Log rtbitmap block from the word @from to the byte before @next. */
+static inline void
+xfs_trans_log_rtbitmap(
+	struct xfs_rtalloc_args	*args,
+	unsigned int		from,
+	unsigned int		next)
+{
+	struct xfs_buf		*bp = args->rbmbp;
+	size_t			first, last;
+
+	first = (void *)xfs_rbmblock_wordptr(args, from) - bp->b_addr;
+	last = ((void *)xfs_rbmblock_wordptr(args, next) - 1) - bp->b_addr;
+
+	xfs_trans_log_buf(args->tp, bp, first, last);
 }
 
 /*
@@ -530,41 +541,37 @@ xfs_rtmodify_summary(
  */
 int
 xfs_rtmodify_range(
-	xfs_mount_t	*mp,		/* file system mount point */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_rtblock_t	start,		/* starting block to modify */
-	xfs_extlen_t	len,		/* length of extent to modify */
-	int		val)		/* 1 for free, 0 for allocated */
+	struct xfs_rtalloc_args	*args,
+	xfs_rtxnum_t		start,	/* starting rtext to modify */
+	xfs_rtxlen_t		len,	/* length of extent to modify */
+	int			val)	/* 1 for free, 0 for allocated */
 {
-	xfs_rtword_t	*b;		/* current word in buffer */
-	int		bit;		/* bit number in the word */
-	xfs_rtblock_t	block;		/* bitmap block number */
-	struct xfs_buf	*bp;		/* buf for the block */
-	xfs_rtword_t	*bufp;		/* starting word in buffer */
-	int		error;		/* error value */
-	xfs_rtword_t	*first;		/* first used word in the buffer */
-	int		i;		/* current bit number rel. to start */
-	int		lastbit;	/* last useful bit in word */
-	xfs_rtword_t	mask;		/* mask o frelevant bits for value */
-	int		word;		/* word number in the buffer */
+	struct xfs_mount	*mp = args->mp;
+	int			bit;	/* bit number in the word */
+	xfs_fileoff_t		block;	/* bitmap block number */
+	int			error;
+	int			i;	/* current bit number rel. to start */
+	int			lastbit; /* last useful bit in word */
+	xfs_rtword_t		mask;	 /* mask of relevant bits for value */
+	xfs_rtword_t		incore;
+	unsigned int		firstword; /* first word used in the buffer */
+	unsigned int		word;	/* word number in the buffer */
 
 	/*
 	 * Compute starting bitmap block number.
 	 */
-	block = XFS_BITTOBLOCK(mp, start);
+	block = xfs_rtx_to_rbmblock(mp, start);
 	/*
 	 * Read the bitmap block, and point to its data.
 	 */
-	error = xfs_rtbuf_get(mp, tp, block, 0, &bp);
-	if (error) {
+	error = xfs_rtbitmap_read_buf(args, block);
+	if (error)
 		return error;
-	}
-	bufp = bp->b_addr;
+
 	/*
 	 * Compute the starting word's address, and starting bit.
 	 */
-	word = XFS_BITTOWORD(mp, start);
-	first = b = &bufp[word];
+	firstword = word = xfs_rtx_to_rbmword(mp, start);
 	bit = (int)(start & (XFS_NBWORD - 1));
 	/*
 	 * 0 (allocated) => all zeroes; 1 (free) => all ones.
@@ -583,34 +590,28 @@ xfs_rtmodify_range(
 		/*
 		 * Set/clear the active bits.
 		 */
+		incore = xfs_rtbitmap_getword(args, word);
 		if (val)
-			*b |= mask;
+			incore |= mask;
 		else
-			*b &= ~mask;
+			incore &= ~mask;
+		xfs_rtbitmap_setword(args, word, incore);
 		i = lastbit - bit;
 		/*
 		 * Go on to the next block if that's where the next word is
 		 * and we need the next word.
 		 */
-		if (++word == XFS_BLOCKWSIZE(mp) && i < len) {
+		if (++word == mp->m_blockwsize && i < len) {
 			/*
 			 * Log the changed part of this block.
 			 * Get the next one.
 			 */
-			xfs_trans_log_buf(tp, bp,
-				(uint)((char *)first - (char *)bufp),
-				(uint)((char *)b - (char *)bufp));
-			error = xfs_rtbuf_get(mp, tp, ++block, 0, &bp);
-			if (error) {
+			xfs_trans_log_rtbitmap(args, firstword, word);
+			error = xfs_rtbitmap_read_buf(args, ++block);
+			if (error)
 				return error;
-			}
-			first = b = bufp = bp->b_addr;
-			word = 0;
-		} else {
-			/*
-			 * Go on to the next word in the buffer
-			 */
-			b++;
+
+			firstword = word = 0;
 		}
 	} else {
 		/*
@@ -626,31 +627,23 @@ xfs_rtmodify_range(
 		/*
 		 * Set the word value correctly.
 		 */
-		*b = val;
+		xfs_rtbitmap_setword(args, word, val);
 		i += XFS_NBWORD;
 		/*
 		 * Go on to the next block if that's where the next word is
 		 * and we need the next word.
 		 */
-		if (++word == XFS_BLOCKWSIZE(mp) && i < len) {
+		if (++word == mp->m_blockwsize && i < len) {
 			/*
 			 * Log the changed part of this block.
 			 * Get the next one.
 			 */
-			xfs_trans_log_buf(tp, bp,
-				(uint)((char *)first - (char *)bufp),
-				(uint)((char *)b - (char *)bufp));
-			error = xfs_rtbuf_get(mp, tp, ++block, 0, &bp);
-			if (error) {
+			xfs_trans_log_rtbitmap(args, firstword, word);
+			error = xfs_rtbitmap_read_buf(args, ++block);
+			if (error)
 				return error;
-			}
-			first = b = bufp = bp->b_addr;
-			word = 0;
-		} else {
-			/*
-			 * Go on to the next word in the buffer
-			 */
-			b++;
+
+			firstword = word = 0;
 		}
 	}
 	/*
@@ -665,18 +658,19 @@ xfs_rtmodify_range(
 		/*
 		 * Set/clear the active bits.
 		 */
+		incore = xfs_rtbitmap_getword(args, word);
 		if (val)
-			*b |= mask;
+			incore |= mask;
 		else
-			*b &= ~mask;
-		b++;
+			incore &= ~mask;
+		xfs_rtbitmap_setword(args, word, incore);
+		word++;
 	}
 	/*
 	 * Log any remaining changed bytes.
 	 */
-	if (b > first)
-		xfs_trans_log_buf(tp, bp, (uint)((char *)first - (char *)bufp),
-			(uint)((char *)b - (char *)bufp - 1));
+	if (word > firstword)
+		xfs_trans_log_rtbitmap(args, firstword, word);
 	return 0;
 }
 
@@ -686,23 +680,21 @@ xfs_rtmodify_range(
  */
 int
 xfs_rtfree_range(
-	xfs_mount_t	*mp,		/* file system mount point */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_rtblock_t	start,		/* starting block to free */
-	xfs_extlen_t	len,		/* length to free */
-	struct xfs_buf	**rbpp,		/* in/out: summary block buffer */
-	xfs_fsblock_t	*rsb)		/* in/out: summary block number */
+	struct xfs_rtalloc_args	*args,
+	xfs_rtxnum_t		start,	/* starting rtext to free */
+	xfs_rtxlen_t		len)	/* in/out: summary block number */
 {
-	xfs_rtblock_t	end;		/* end of the freed extent */
-	int		error;		/* error value */
-	xfs_rtblock_t	postblock;	/* first block freed > end */
-	xfs_rtblock_t	preblock;	/* first block freed < start */
+	struct xfs_mount	*mp = args->mp;
+	xfs_rtxnum_t		end;	/* end of the freed extent */
+	int			error;	/* error value */
+	xfs_rtxnum_t		postblock; /* first rtext freed > end */
+	xfs_rtxnum_t		preblock;  /* first rtext freed < start */
 
 	end = start + len - 1;
 	/*
 	 * Modify the bitmap to mark this extent freed.
 	 */
-	error = xfs_rtmodify_range(mp, tp, start, len, 1);
+	error = xfs_rtmodify_range(args, start, len, 1);
 	if (error) {
 		return error;
 	}
@@ -711,15 +703,15 @@ xfs_rtfree_range(
 	 * We need to find the beginning and end of the extent so we can
 	 * properly update the summary.
 	 */
-	error = xfs_rtfind_back(mp, tp, start, 0, &preblock);
+	error = xfs_rtfind_back(args, start, 0, &preblock);
 	if (error) {
 		return error;
 	}
 	/*
 	 * Find the next allocated block (end of allocated extent).
 	 */
-	error = xfs_rtfind_forw(mp, tp, end, mp->m_sb.sb_rextents - 1,
-		&postblock);
+	error = xfs_rtfind_forw(args, end, mp->m_sb.sb_rextents - 1,
+			&postblock);
 	if (error)
 		return error;
 	/*
@@ -727,9 +719,9 @@ xfs_rtfree_range(
 	 * old extent, add summary data for them to be allocated.
 	 */
 	if (preblock < start) {
-		error = xfs_rtmodify_summary(mp, tp,
-			XFS_RTBLOCKLOG(start - preblock),
-			XFS_BITTOBLOCK(mp, preblock), -1, rbpp, rsb);
+		error = xfs_rtmodify_summary(args,
+				XFS_RTBLOCKLOG(start - preblock),
+				xfs_rtx_to_rbmblock(mp, preblock), -1);
 		if (error) {
 			return error;
 		}
@@ -739,9 +731,9 @@ xfs_rtfree_range(
 	 * old extent, add summary data for them to be allocated.
 	 */
 	if (postblock > end) {
-		error = xfs_rtmodify_summary(mp, tp,
-			XFS_RTBLOCKLOG(postblock - end),
-			XFS_BITTOBLOCK(mp, end + 1), -1, rbpp, rsb);
+		error = xfs_rtmodify_summary(args,
+				XFS_RTBLOCKLOG(postblock - end),
+				xfs_rtx_to_rbmblock(mp, end + 1), -1);
 		if (error) {
 			return error;
 		}
@@ -750,10 +742,9 @@ xfs_rtfree_range(
 	 * Increment the summary information corresponding to the entire
 	 * (new) free extent.
 	 */
-	error = xfs_rtmodify_summary(mp, tp,
-		XFS_RTBLOCKLOG(postblock + 1 - preblock),
-		XFS_BITTOBLOCK(mp, preblock), 1, rbpp, rsb);
-	return error;
+	return xfs_rtmodify_summary(args,
+			XFS_RTBLOCKLOG(postblock + 1 - preblock),
+			xfs_rtx_to_rbmblock(mp, preblock), 1);
 }
 
 /*
@@ -762,43 +753,39 @@ xfs_rtfree_range(
  */
 int
 xfs_rtcheck_range(
-	xfs_mount_t	*mp,		/* file system mount point */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_rtblock_t	start,		/* starting block number of extent */
-	xfs_extlen_t	len,		/* length of extent */
-	int		val,		/* 1 for free, 0 for allocated */
-	xfs_rtblock_t	*new,		/* out: first block not matching */
-	int		*stat)		/* out: 1 for matches, 0 for not */
+	struct xfs_rtalloc_args	*args,
+	xfs_rtxnum_t		start,	/* starting rtext number of extent */
+	xfs_rtxlen_t		len,	/* length of extent */
+	int			val,	/* 1 for free, 0 for allocated */
+	xfs_rtxnum_t		*new,	/* out: first rtext not matching */
+	int			*stat)	/* out: 1 for matches, 0 for not */
 {
-	xfs_rtword_t	*b;		/* current word in buffer */
-	int		bit;		/* bit number in the word */
-	xfs_rtblock_t	block;		/* bitmap block number */
-	struct xfs_buf	*bp;		/* buf for the block */
-	xfs_rtword_t	*bufp;		/* starting word in buffer */
-	int		error;		/* error value */
-	xfs_rtblock_t	i;		/* current bit number rel. to start */
-	xfs_rtblock_t	lastbit;	/* last useful bit in word */
-	xfs_rtword_t	mask;		/* mask of relevant bits for value */
-	xfs_rtword_t	wdiff;		/* difference from wanted value */
-	int		word;		/* word number in the buffer */
+	struct xfs_mount	*mp = args->mp;
+	int			bit;	/* bit number in the word */
+	xfs_fileoff_t		block;	/* bitmap block number */
+	int			error;
+	xfs_rtxnum_t		i;	/* current bit number rel. to start */
+	xfs_rtxnum_t		lastbit; /* last useful bit in word */
+	xfs_rtword_t		mask;	/* mask of relevant bits for value */
+	xfs_rtword_t		wdiff;	/* difference from wanted value */
+	xfs_rtword_t		incore;
+	unsigned int		word;	/* word number in the buffer */
 
 	/*
 	 * Compute starting bitmap block number
 	 */
-	block = XFS_BITTOBLOCK(mp, start);
+	block = xfs_rtx_to_rbmblock(mp, start);
 	/*
 	 * Read the bitmap block.
 	 */
-	error = xfs_rtbuf_get(mp, tp, block, 0, &bp);
-	if (error) {
+	error = xfs_rtbitmap_read_buf(args, block);
+	if (error)
 		return error;
-	}
-	bufp = bp->b_addr;
+
 	/*
 	 * Compute the starting word's address, and starting bit.
 	 */
-	word = XFS_BITTOWORD(mp, start);
-	b = &bufp[word];
+	word = xfs_rtx_to_rbmword(mp, start);
 	bit = (int)(start & (XFS_NBWORD - 1));
 	/*
 	 * 0 (allocated) => all zero's; 1 (free) => all one's.
@@ -820,11 +807,11 @@ xfs_rtcheck_range(
 		/*
 		 * Compute difference between actual and desired value.
 		 */
-		if ((wdiff = (*b ^ val) & mask)) {
+		incore = xfs_rtbitmap_getword(args, word);
+		if ((wdiff = (incore ^ val) & mask)) {
 			/*
 			 * Different, compute first wrong bit and return.
 			 */
-			xfs_trans_brelse(tp, bp);
 			i = XFS_RTLOBIT(wdiff) - bit;
 			*new = start + i;
 			*stat = 0;
@@ -835,22 +822,15 @@ xfs_rtcheck_range(
 		 * Go on to next block if that's where the next word is
 		 * and we need the next word.
 		 */
-		if (++word == XFS_BLOCKWSIZE(mp) && i < len) {
+		if (++word == mp->m_blockwsize && i < len) {
 			/*
 			 * If done with this block, get the next one.
 			 */
-			xfs_trans_brelse(tp, bp);
-			error = xfs_rtbuf_get(mp, tp, ++block, 0, &bp);
-			if (error) {
+			error = xfs_rtbitmap_read_buf(args, ++block);
+			if (error)
 				return error;
-			}
-			b = bufp = bp->b_addr;
+
 			word = 0;
-		} else {
-			/*
-			 * Go on to the next word in the buffer.
-			 */
-			b++;
 		}
 	} else {
 		/*
@@ -866,11 +846,11 @@ xfs_rtcheck_range(
 		/*
 		 * Compute difference between actual and desired value.
 		 */
-		if ((wdiff = *b ^ val)) {
+		incore = xfs_rtbitmap_getword(args, word);
+		if ((wdiff = incore ^ val)) {
 			/*
 			 * Different, compute first wrong bit and return.
 			 */
-			xfs_trans_brelse(tp, bp);
 			i += XFS_RTLOBIT(wdiff);
 			*new = start + i;
 			*stat = 0;
@@ -881,22 +861,15 @@ xfs_rtcheck_range(
 		 * Go on to next block if that's where the next word is
 		 * and we need the next word.
 		 */
-		if (++word == XFS_BLOCKWSIZE(mp) && i < len) {
+		if (++word == mp->m_blockwsize && i < len) {
 			/*
 			 * If done with this block, get the next one.
 			 */
-			xfs_trans_brelse(tp, bp);
-			error = xfs_rtbuf_get(mp, tp, ++block, 0, &bp);
-			if (error) {
+			error = xfs_rtbitmap_read_buf(args, ++block);
+			if (error)
 				return error;
-			}
-			b = bufp = bp->b_addr;
+
 			word = 0;
-		} else {
-			/*
-			 * Go on to the next word in the buffer.
-			 */
-			b++;
 		}
 	}
 	/*
@@ -911,11 +884,11 @@ xfs_rtcheck_range(
 		/*
 		 * Compute difference between actual and desired value.
 		 */
-		if ((wdiff = (*b ^ val) & mask)) {
+		incore = xfs_rtbitmap_getword(args, word);
+		if ((wdiff = (incore ^ val) & mask)) {
 			/*
 			 * Different, compute first wrong bit and return.
 			 */
-			xfs_trans_brelse(tp, bp);
 			i += XFS_RTLOBIT(wdiff);
 			*new = start + i;
 			*stat = 0;
@@ -926,7 +899,6 @@ xfs_rtcheck_range(
 	/*
 	 * Successful, return.
 	 */
-	xfs_trans_brelse(tp, bp);
 	*new = start + i;
 	*stat = 1;
 	return 0;
@@ -936,57 +908,57 @@ xfs_rtcheck_range(
 /*
  * Check that the given extent (block range) is allocated already.
  */
-STATIC int				/* error */
+STATIC int
 xfs_rtcheck_alloc_range(
-	xfs_mount_t	*mp,		/* file system mount point */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_rtblock_t	bno,		/* starting block number of extent */
-	xfs_extlen_t	len)		/* length of extent */
+	struct xfs_rtalloc_args	*args,
+	xfs_rtxnum_t		start,	/* starting rtext number of extent */
+	xfs_rtxlen_t		len)	/* length of extent */
 {
-	xfs_rtblock_t	new;		/* dummy for xfs_rtcheck_range */
-	int		stat;
-	int		error;
+	xfs_rtxnum_t		new;	/* dummy for xfs_rtcheck_range */
+	int			stat;
+	int			error;
 
-	error = xfs_rtcheck_range(mp, tp, bno, len, 0, &new, &stat);
+	error = xfs_rtcheck_range(args, start, len, 0, &new, &stat);
 	if (error)
 		return error;
 	ASSERT(stat);
 	return 0;
 }
 #else
-#define xfs_rtcheck_alloc_range(m,t,b,l)	(0)
+#define xfs_rtcheck_alloc_range(a,b,l)	(0)
 #endif
 /*
  * Free an extent in the realtime subvolume.  Length is expressed in
  * realtime extents, as is the block number.
  */
-int					/* error */
+int
 xfs_rtfree_extent(
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_rtblock_t	bno,		/* starting block number to free */
-	xfs_extlen_t	len)		/* length of extent freed */
+	struct xfs_trans	*tp,	/* transaction pointer */
+	xfs_rtxnum_t		start,	/* starting rtext number to free */
+	xfs_rtxlen_t		len)	/* length of extent freed */
 {
-	int		error;		/* error value */
-	xfs_mount_t	*mp;		/* file system mount structure */
-	xfs_fsblock_t	sb;		/* summary file block number */
-	struct xfs_buf	*sumbp = NULL;	/* summary file block buffer */
-
-	mp = tp->t_mountp;
+	struct xfs_mount	*mp = tp->t_mountp;
+	struct xfs_rtalloc_args	args = {
+		.mp		= mp,
+		.tp		= tp,
+	};
+	int			error;
+	struct timespec64	atime;
 
 	ASSERT(mp->m_rbmip->i_itemp != NULL);
 	ASSERT(xfs_isilocked(mp->m_rbmip, XFS_ILOCK_EXCL));
 
-	error = xfs_rtcheck_alloc_range(mp, tp, bno, len);
+	error = xfs_rtcheck_alloc_range(&args, start, len);
 	if (error)
 		return error;
 
 	/*
 	 * Free the range of realtime blocks.
 	 */
-	error = xfs_rtfree_range(mp, tp, bno, len, &sumbp, &sb);
-	if (error) {
-		return error;
-	}
+	error = xfs_rtfree_range(&args, start, len);
+	if (error)
+		goto out;
+
 	/*
 	 * Mark more blocks free in the superblock.
 	 */
@@ -999,10 +971,49 @@ xfs_rtfree_extent(
 	    mp->m_sb.sb_rextents) {
 		if (!(mp->m_rbmip->i_diflags & XFS_DIFLAG_NEWRTBM))
 			mp->m_rbmip->i_diflags |= XFS_DIFLAG_NEWRTBM;
-		*(uint64_t *)&VFS_I(mp->m_rbmip)->i_atime = 0;
+
+		atime = inode_get_atime(VFS_I(mp->m_rbmip));
+		atime.tv_sec = 0;
+		inode_set_atime_to_ts(VFS_I(mp->m_rbmip), atime);
 		xfs_trans_log_inode(tp, mp->m_rbmip, XFS_ILOG_CORE);
 	}
-	return 0;
+	error = 0;
+out:
+	xfs_rtbuf_cache_relse(&args);
+	return error;
+}
+
+/*
+ * Free some blocks in the realtime subvolume.  rtbno and rtlen are in units of
+ * rt blocks, not rt extents; must be aligned to the rt extent size; and rtlen
+ * cannot exceed XFS_MAX_BMBT_EXTLEN.
+ */
+int
+xfs_rtfree_blocks(
+	struct xfs_trans	*tp,
+	xfs_fsblock_t		rtbno,
+	xfs_filblks_t		rtlen)
+{
+	struct xfs_mount	*mp = tp->t_mountp;
+	xfs_rtxnum_t		start;
+	xfs_filblks_t		len;
+	xfs_extlen_t		mod;
+
+	ASSERT(rtlen <= XFS_MAX_BMBT_EXTLEN);
+
+	len = xfs_rtb_to_rtxrem(mp, rtlen, &mod);
+	if (mod) {
+		ASSERT(mod == 0);
+		return -EIO;
+	}
+
+	start = xfs_rtb_to_rtxrem(mp, rtbno, &mod);
+	if (mod) {
+		ASSERT(mod == 0);
+		return -EIO;
+	}
+
+	return xfs_rtfree_extent(tp, start, len);
 }
 
 /* Find all the free records within a given range. */
@@ -1015,10 +1026,14 @@ xfs_rtalloc_query_range(
 	xfs_rtalloc_query_range_fn	fn,
 	void				*priv)
 {
+	struct xfs_rtalloc_args		args = {
+		.mp			= mp,
+		.tp			= tp,
+	};
 	struct xfs_rtalloc_rec		rec;
-	xfs_rtblock_t			rtstart;
-	xfs_rtblock_t			rtend;
-	xfs_rtblock_t			high_key;
+	xfs_rtxnum_t			rtstart;
+	xfs_rtxnum_t			rtend;
+	xfs_rtxnum_t			high_key;
 	int				is_free;
 	int				error = 0;
 
@@ -1034,13 +1049,13 @@ xfs_rtalloc_query_range(
 	rtstart = low_rec->ar_startext;
 	while (rtstart <= high_key) {
 		/* Is the first block free? */
-		error = xfs_rtcheck_range(mp, tp, rtstart, 1, 1, &rtend,
+		error = xfs_rtcheck_range(&args, rtstart, 1, 1, &rtend,
 				&is_free);
 		if (error)
 			break;
 
 		/* How long does the extent go for? */
-		error = xfs_rtfind_forw(mp, tp, rtstart, high_key, &rtend);
+		error = xfs_rtfind_forw(&args, rtstart, high_key, &rtend);
 		if (error)
 			break;
 
@@ -1056,6 +1071,7 @@ xfs_rtalloc_query_range(
 		rtstart = rtend + 1;
 	}
 
+	xfs_rtbuf_cache_relse(&args);
 	return error;
 }
 
@@ -1081,18 +1097,79 @@ int
 xfs_rtalloc_extent_is_free(
 	struct xfs_mount		*mp,
 	struct xfs_trans		*tp,
-	xfs_rtblock_t			start,
-	xfs_extlen_t			len,
+	xfs_rtxnum_t			start,
+	xfs_rtxlen_t			len,
 	bool				*is_free)
 {
-	xfs_rtblock_t			end;
+	struct xfs_rtalloc_args		args = {
+		.mp			= mp,
+		.tp			= tp,
+	};
+	xfs_rtxnum_t			end;
 	int				matches;
 	int				error;
 
-	error = xfs_rtcheck_range(mp, tp, start, len, 1, &end, &matches);
+	error = xfs_rtcheck_range(&args, start, len, 1, &end, &matches);
+	xfs_rtbuf_cache_relse(&args);
 	if (error)
 		return error;
 
 	*is_free = matches;
 	return 0;
 }
+
+/*
+ * Compute the number of rtbitmap blocks needed to track the given number of rt
+ * extents.
+ */
+xfs_filblks_t
+xfs_rtbitmap_blockcount(
+	struct xfs_mount	*mp,
+	xfs_rtbxlen_t		rtextents)
+{
+	return howmany_64(rtextents, NBBY * mp->m_sb.sb_blocksize);
+}
+
+/*
+ * Compute the number of rtbitmap words needed to populate every block of a
+ * bitmap that is large enough to track the given number of rt extents.
+ */
+unsigned long long
+xfs_rtbitmap_wordcount(
+	struct xfs_mount	*mp,
+	xfs_rtbxlen_t		rtextents)
+{
+	xfs_filblks_t		blocks;
+
+	blocks = xfs_rtbitmap_blockcount(mp, rtextents);
+	return XFS_FSB_TO_B(mp, blocks) >> XFS_WORDLOG;
+}
+
+/* Compute the number of rtsummary blocks needed to track the given rt space. */
+xfs_filblks_t
+xfs_rtsummary_blockcount(
+	struct xfs_mount	*mp,
+	unsigned int		rsumlevels,
+	xfs_extlen_t		rbmblocks)
+{
+	unsigned long long	rsumwords;
+
+	rsumwords = (unsigned long long)rsumlevels * rbmblocks;
+	return XFS_B_TO_FSB(mp, rsumwords << XFS_WORDLOG);
+}
+
+/*
+ * Compute the number of rtsummary info words needed to populate every block of
+ * a summary file that is large enough to track the given rt space.
+ */
+unsigned long long
+xfs_rtsummary_wordcount(
+	struct xfs_mount	*mp,
+	unsigned int		rsumlevels,
+	xfs_extlen_t		rbmblocks)
+{
+	xfs_filblks_t		blocks;
+
+	blocks = xfs_rtsummary_blockcount(mp, rsumlevels, rbmblocks);
+	return XFS_FSB_TO_B(mp, blocks) >> XFS_WORDLOG;
+}
diff --git a/fs/xfs/libxfs/xfs_rtbitmap.h b/fs/xfs/libxfs/xfs_rtbitmap.h
new file mode 100644
index 0000000000..c0637057d6
--- /dev/null
+++ b/fs/xfs/libxfs/xfs_rtbitmap.h
@@ -0,0 +1,383 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ */
+#ifndef __XFS_RTBITMAP_H__
+#define	__XFS_RTBITMAP_H__
+
+struct xfs_rtalloc_args {
+	struct xfs_mount	*mp;
+	struct xfs_trans	*tp;
+
+	struct xfs_buf		*rbmbp;	/* bitmap block buffer */
+	struct xfs_buf		*sumbp;	/* summary block buffer */
+
+	xfs_fileoff_t		rbmoff;	/* bitmap block number */
+	xfs_fileoff_t		sumoff;	/* summary block number */
+};
+
+static inline xfs_rtblock_t
+xfs_rtx_to_rtb(
+	struct xfs_mount	*mp,
+	xfs_rtxnum_t		rtx)
+{
+	if (mp->m_rtxblklog >= 0)
+		return rtx << mp->m_rtxblklog;
+
+	return rtx * mp->m_sb.sb_rextsize;
+}
+
+static inline xfs_extlen_t
+xfs_rtxlen_to_extlen(
+	struct xfs_mount	*mp,
+	xfs_rtxlen_t		rtxlen)
+{
+	if (mp->m_rtxblklog >= 0)
+		return rtxlen << mp->m_rtxblklog;
+
+	return rtxlen * mp->m_sb.sb_rextsize;
+}
+
+/* Compute the misalignment between an extent length and a realtime extent .*/
+static inline unsigned int
+xfs_extlen_to_rtxmod(
+	struct xfs_mount	*mp,
+	xfs_extlen_t		len)
+{
+	if (mp->m_rtxblklog >= 0)
+		return len & mp->m_rtxblkmask;
+
+	return len % mp->m_sb.sb_rextsize;
+}
+
+static inline xfs_rtxlen_t
+xfs_extlen_to_rtxlen(
+	struct xfs_mount	*mp,
+	xfs_extlen_t		len)
+{
+	if (mp->m_rtxblklog >= 0)
+		return len >> mp->m_rtxblklog;
+
+	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)
+{
+	if (likely(mp->m_rtxblklog >= 0))
+		return rtbno >> mp->m_rtxblklog;
+
+	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)
+{
+	if (likely(mp->m_rtxblklog >= 0))
+		return rtbno & mp->m_rtxblkmask;
+
+	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)
+{
+	if (likely(mp->m_rtxblklog >= 0)) {
+		*off = rtbno & mp->m_rtxblkmask;
+		return rtbno >> mp->m_rtxblklog;
+	}
+
+	return div_u64_rem(rtbno, mp->m_sb.sb_rextsize, off);
+}
+
+/*
+ * Convert an rt block number into an rt extent number, rounding up to the next
+ * rt extent if the rt block is not aligned to an rt extent boundary.
+ */
+static inline xfs_rtxnum_t
+xfs_rtb_to_rtxup(
+	struct xfs_mount	*mp,
+	xfs_rtblock_t		rtbno)
+{
+	if (likely(mp->m_rtxblklog >= 0)) {
+		if (rtbno & mp->m_rtxblkmask)
+			return (rtbno >> mp->m_rtxblklog) + 1;
+		return rtbno >> mp->m_rtxblklog;
+	}
+
+	if (do_div(rtbno, mp->m_sb.sb_rextsize))
+		rtbno++;
+	return rtbno;
+}
+
+/* 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);
+}
+
+/* Convert an rt extent number to a file block offset in the rt bitmap file. */
+static inline xfs_fileoff_t
+xfs_rtx_to_rbmblock(
+	struct xfs_mount	*mp,
+	xfs_rtxnum_t		rtx)
+{
+	return rtx >> mp->m_blkbit_log;
+}
+
+/* Convert an rt extent number to a word offset within an rt bitmap block. */
+static inline unsigned int
+xfs_rtx_to_rbmword(
+	struct xfs_mount	*mp,
+	xfs_rtxnum_t		rtx)
+{
+	return (rtx >> XFS_NBWORDLOG) & (mp->m_blockwsize - 1);
+}
+
+/* Convert a file block offset in the rt bitmap file to an rt extent number. */
+static inline xfs_rtxnum_t
+xfs_rbmblock_to_rtx(
+	struct xfs_mount	*mp,
+	xfs_fileoff_t		rbmoff)
+{
+	return rbmoff << mp->m_blkbit_log;
+}
+
+/* Return a pointer to a bitmap word within a rt bitmap block. */
+static inline union xfs_rtword_raw *
+xfs_rbmblock_wordptr(
+	struct xfs_rtalloc_args	*args,
+	unsigned int		index)
+{
+	union xfs_rtword_raw	*words = args->rbmbp->b_addr;
+
+	return words + index;
+}
+
+/* Convert an ondisk bitmap word to its incore representation. */
+static inline xfs_rtword_t
+xfs_rtbitmap_getword(
+	struct xfs_rtalloc_args	*args,
+	unsigned int		index)
+{
+	union xfs_rtword_raw	*word = xfs_rbmblock_wordptr(args, index);
+
+	return word->old;
+}
+
+/* Set an ondisk bitmap word from an incore representation. */
+static inline void
+xfs_rtbitmap_setword(
+	struct xfs_rtalloc_args	*args,
+	unsigned int		index,
+	xfs_rtword_t		value)
+{
+	union xfs_rtword_raw	*word = xfs_rbmblock_wordptr(args, index);
+
+	word->old = value;
+}
+
+/*
+ * Convert a rt extent length and rt bitmap block number to a xfs_suminfo_t
+ * offset within the rt summary file.
+ */
+static inline xfs_rtsumoff_t
+xfs_rtsumoffs(
+	struct xfs_mount	*mp,
+	int			log2_len,
+	xfs_fileoff_t		rbmoff)
+{
+	return log2_len * mp->m_sb.sb_rbmblocks + rbmoff;
+}
+
+/*
+ * Convert an xfs_suminfo_t offset to a file block offset within the rt summary
+ * file.
+ */
+static inline xfs_fileoff_t
+xfs_rtsumoffs_to_block(
+	struct xfs_mount	*mp,
+	xfs_rtsumoff_t		rsumoff)
+{
+	return XFS_B_TO_FSBT(mp, rsumoff * sizeof(xfs_suminfo_t));
+}
+
+/*
+ * Convert an xfs_suminfo_t offset to an info word offset within an rt summary
+ * block.
+ */
+static inline unsigned int
+xfs_rtsumoffs_to_infoword(
+	struct xfs_mount	*mp,
+	xfs_rtsumoff_t		rsumoff)
+{
+	unsigned int		mask = mp->m_blockmask >> XFS_SUMINFOLOG;
+
+	return rsumoff & mask;
+}
+
+/* Return a pointer to a summary info word within a rt summary block. */
+static inline union xfs_suminfo_raw *
+xfs_rsumblock_infoptr(
+	struct xfs_rtalloc_args	*args,
+	unsigned int		index)
+{
+	union xfs_suminfo_raw	*info = args->sumbp->b_addr;
+
+	return info + index;
+}
+
+/* Get the current value of a summary counter. */
+static inline xfs_suminfo_t
+xfs_suminfo_get(
+	struct xfs_rtalloc_args	*args,
+	unsigned int		index)
+{
+	union xfs_suminfo_raw	*info = xfs_rsumblock_infoptr(args, index);
+
+	return info->old;
+}
+
+/* Add to the current value of a summary counter and return the new value. */
+static inline xfs_suminfo_t
+xfs_suminfo_add(
+	struct xfs_rtalloc_args	*args,
+	unsigned int		index,
+	int			delta)
+{
+	union xfs_suminfo_raw	*info = xfs_rsumblock_infoptr(args, index);
+
+	info->old += delta;
+	return info->old;
+}
+
+/*
+ * Functions for walking free space rtextents in the realtime bitmap.
+ */
+struct xfs_rtalloc_rec {
+	xfs_rtxnum_t		ar_startext;
+	xfs_rtbxlen_t		ar_extcount;
+};
+
+typedef int (*xfs_rtalloc_query_range_fn)(
+	struct xfs_mount		*mp,
+	struct xfs_trans		*tp,
+	const struct xfs_rtalloc_rec	*rec,
+	void				*priv);
+
+#ifdef CONFIG_XFS_RT
+void xfs_rtbuf_cache_relse(struct xfs_rtalloc_args *args);
+
+int xfs_rtbuf_get(struct xfs_rtalloc_args *args, xfs_fileoff_t block,
+		int issum);
+
+static inline int
+xfs_rtbitmap_read_buf(
+	struct xfs_rtalloc_args		*args,
+	xfs_fileoff_t			block)
+{
+	return xfs_rtbuf_get(args, block, 0);
+}
+
+static inline int
+xfs_rtsummary_read_buf(
+	struct xfs_rtalloc_args		*args,
+	xfs_fileoff_t			block)
+{
+	return xfs_rtbuf_get(args, block, 1);
+}
+
+int xfs_rtcheck_range(struct xfs_rtalloc_args *args, xfs_rtxnum_t start,
+		xfs_rtxlen_t len, int val, xfs_rtxnum_t *new, int *stat);
+int xfs_rtfind_back(struct xfs_rtalloc_args *args, xfs_rtxnum_t start,
+		xfs_rtxnum_t limit, xfs_rtxnum_t *rtblock);
+int xfs_rtfind_forw(struct xfs_rtalloc_args *args, xfs_rtxnum_t start,
+		xfs_rtxnum_t limit, xfs_rtxnum_t *rtblock);
+int xfs_rtmodify_range(struct xfs_rtalloc_args *args, xfs_rtxnum_t start,
+		xfs_rtxlen_t len, int val);
+int xfs_rtmodify_summary_int(struct xfs_rtalloc_args *args, int log,
+		xfs_fileoff_t bbno, int delta, xfs_suminfo_t *sum);
+int xfs_rtmodify_summary(struct xfs_rtalloc_args *args, int log,
+		xfs_fileoff_t bbno, int delta);
+int xfs_rtfree_range(struct xfs_rtalloc_args *args, xfs_rtxnum_t start,
+		xfs_rtxlen_t len);
+int xfs_rtalloc_query_range(struct xfs_mount *mp, struct xfs_trans *tp,
+		const struct xfs_rtalloc_rec *low_rec,
+		const struct xfs_rtalloc_rec *high_rec,
+		xfs_rtalloc_query_range_fn fn, void *priv);
+int xfs_rtalloc_query_all(struct xfs_mount *mp, struct xfs_trans *tp,
+			  xfs_rtalloc_query_range_fn fn,
+			  void *priv);
+int xfs_rtalloc_extent_is_free(struct xfs_mount *mp, struct xfs_trans *tp,
+			       xfs_rtxnum_t start, xfs_rtxlen_t len,
+			       bool *is_free);
+/*
+ * Free an extent in the realtime subvolume.  Length is expressed in
+ * realtime extents, as is the block number.
+ */
+int					/* error */
+xfs_rtfree_extent(
+	struct xfs_trans	*tp,	/* transaction pointer */
+	xfs_rtxnum_t		start,	/* starting rtext number to free */
+	xfs_rtxlen_t		len);	/* length of extent freed */
+
+/* Same as above, but in units of rt blocks. */
+int xfs_rtfree_blocks(struct xfs_trans *tp, xfs_fsblock_t rtbno,
+		xfs_filblks_t rtlen);
+
+xfs_filblks_t xfs_rtbitmap_blockcount(struct xfs_mount *mp, xfs_rtbxlen_t
+		rtextents);
+unsigned long long xfs_rtbitmap_wordcount(struct xfs_mount *mp,
+		xfs_rtbxlen_t rtextents);
+
+xfs_filblks_t xfs_rtsummary_blockcount(struct xfs_mount *mp,
+		unsigned int rsumlevels, xfs_extlen_t rbmblocks);
+unsigned long long xfs_rtsummary_wordcount(struct xfs_mount *mp,
+		unsigned int rsumlevels, xfs_extlen_t rbmblocks);
+#else /* CONFIG_XFS_RT */
+# define xfs_rtfree_extent(t,b,l)			(-ENOSYS)
+# define xfs_rtfree_blocks(t,rb,rl)			(-ENOSYS)
+# define xfs_rtalloc_query_range(m,t,l,h,f,p)		(-ENOSYS)
+# define xfs_rtalloc_query_all(m,t,f,p)			(-ENOSYS)
+# define xfs_rtbitmap_read_buf(a,b)			(-ENOSYS)
+# define xfs_rtsummary_read_buf(a,b)			(-ENOSYS)
+# define xfs_rtbuf_cache_relse(a)			(0)
+# define xfs_rtalloc_extent_is_free(m,t,s,l,i)		(-ENOSYS)
+static inline xfs_filblks_t
+xfs_rtbitmap_blockcount(struct xfs_mount *mp, xfs_rtbxlen_t rtextents)
+{
+	/* shut up gcc */
+	return 0;
+}
+# define xfs_rtbitmap_wordcount(mp, r)			(0)
+# define xfs_rtsummary_blockcount(mp, l, b)		(0)
+# define xfs_rtsummary_wordcount(mp, l, b)		(0)
+#endif /* CONFIG_XFS_RT */
+
+#endif /* __XFS_RTBITMAP_H__ */
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index 6264daaab3..1f74d0cd16 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -975,6 +975,8 @@ xfs_sb_mount_common(
 	mp->m_blockmask = sbp->sb_blocksize - 1;
 	mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG;
 	mp->m_blockwmask = mp->m_blockwsize - 1;
+	mp->m_rtxblklog = log2_if_power2(sbp->sb_rextsize);
+	mp->m_rtxblkmask = mask64_if_power2(sbp->sb_rextsize);
 
 	mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1);
 	mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0);
diff --git a/fs/xfs/libxfs/xfs_sb.h b/fs/xfs/libxfs/xfs_sb.h
index a5e14740ec..19134b23c1 100644
--- a/fs/xfs/libxfs/xfs_sb.h
+++ b/fs/xfs/libxfs/xfs_sb.h
@@ -25,7 +25,7 @@ extern uint64_t	xfs_sb_version_to_features(struct xfs_sb *sbp);
 
 extern int	xfs_update_secondary_sbs(struct xfs_mount *mp);
 
-#define XFS_FS_GEOM_MAX_STRUCT_VER	(4)
+#define XFS_FS_GEOM_MAX_STRUCT_VER	(5)
 extern void	xfs_fs_geometry(struct xfs_mount *mp, struct xfs_fsop_geom *geo,
 				int struct_version);
 extern int	xfs_sb_read_secondary(struct xfs_mount *mp,
diff --git a/fs/xfs/libxfs/xfs_trans_inode.c b/fs/xfs/libxfs/xfs_trans_inode.c
index 6b2296ff24..70e97ea6ee 100644
--- a/fs/xfs/libxfs/xfs_trans_inode.c
+++ b/fs/xfs/libxfs/xfs_trans_inode.c
@@ -65,7 +65,7 @@ xfs_trans_ichgtime(
 	tv = current_time(inode);
 
 	if (flags & XFS_ICHGTIME_MOD)
-		inode->i_mtime = tv;
+		inode_set_mtime_to_ts(inode, tv);
 	if (flags & XFS_ICHGTIME_CHG)
 		inode_set_ctime_to_ts(inode, tv);
 	if (flags & XFS_ICHGTIME_CREATE)
diff --git a/fs/xfs/libxfs/xfs_trans_resv.c b/fs/xfs/libxfs/xfs_trans_resv.c
index 5b2f27cbdb..6cd45e8c11 100644
--- a/fs/xfs/libxfs/xfs_trans_resv.c
+++ b/fs/xfs/libxfs/xfs_trans_resv.c
@@ -19,6 +19,7 @@
 #include "xfs_trans.h"
 #include "xfs_qm.h"
 #include "xfs_trans_space.h"
+#include "xfs_rtbitmap.h"
 
 #define _ALLOC	true
 #define _FREE	false
@@ -217,11 +218,12 @@ xfs_rtalloc_block_count(
 	struct xfs_mount	*mp,
 	unsigned int		num_ops)
 {
-	unsigned int		blksz = XFS_FSB_TO_B(mp, 1);
-	unsigned int		rtbmp_bytes;
+	unsigned int		rtbmp_blocks;
+	xfs_rtxlen_t		rtxlen;
 
-	rtbmp_bytes = (XFS_MAX_BMBT_EXTLEN / mp->m_sb.sb_rextsize) / NBBY;
-	return (howmany(rtbmp_bytes, blksz) + 1) * num_ops;
+	rtxlen = xfs_extlen_to_rtxlen(mp, XFS_MAX_BMBT_EXTLEN);
+	rtbmp_blocks = xfs_rtbitmap_blockcount(mp, rtxlen);
+	return (rtbmp_blocks + 1) * num_ops;
 }
 
 /*
diff --git a/fs/xfs/libxfs/xfs_types.c b/fs/xfs/libxfs/xfs_types.c
index 5c27659347..c299b16c93 100644
--- a/fs/xfs/libxfs/xfs_types.c
+++ b/fs/xfs/libxfs/xfs_types.c
@@ -148,10 +148,10 @@ xfs_verify_rtbno(
 
 /* Verify that a realtime device extent is fully contained inside the volume. */
 bool
-xfs_verify_rtext(
+xfs_verify_rtbext(
 	struct xfs_mount	*mp,
 	xfs_rtblock_t		rtbno,
-	xfs_rtblock_t		len)
+	xfs_filblks_t		len)
 {
 	if (rtbno + len <= rtbno)
 		return false;
diff --git a/fs/xfs/libxfs/xfs_types.h b/fs/xfs/libxfs/xfs_types.h
index 8512200214..533200c4cc 100644
--- a/fs/xfs/libxfs/xfs_types.h
+++ b/fs/xfs/libxfs/xfs_types.h
@@ -11,6 +11,7 @@ typedef uint32_t	prid_t;		/* project ID */
 typedef uint32_t	xfs_agblock_t;	/* blockno in alloc. group */
 typedef uint32_t	xfs_agino_t;	/* inode # within allocation grp */
 typedef uint32_t	xfs_extlen_t;	/* extent length in blocks */
+typedef uint32_t	xfs_rtxlen_t;	/* file extent length in rtextents */
 typedef uint32_t	xfs_agnumber_t;	/* allocation group number */
 typedef uint64_t	xfs_extnum_t;	/* # of extents in a file */
 typedef uint32_t	xfs_aextnum_t;	/* # extents in an attribute fork */
@@ -18,6 +19,7 @@ typedef int64_t		xfs_fsize_t;	/* bytes in a file */
 typedef uint64_t	xfs_ufsize_t;	/* unsigned bytes in a file */
 
 typedef int32_t		xfs_suminfo_t;	/* type of bitmap summary info */
+typedef uint32_t	xfs_rtsumoff_t;	/* offset of an rtsummary info word */
 typedef uint32_t	xfs_rtword_t;	/* word type for bitmap manipulations */
 
 typedef int64_t		xfs_lsn_t;	/* log sequence number */
@@ -31,6 +33,8 @@ typedef uint64_t	xfs_rfsblock_t;	/* blockno in filesystem (raw) */
 typedef uint64_t	xfs_rtblock_t;	/* extent (block) in realtime area */
 typedef uint64_t	xfs_fileoff_t;	/* block number in a file */
 typedef uint64_t	xfs_filblks_t;	/* number of blocks in a file */
+typedef uint64_t	xfs_rtxnum_t;	/* rtextent number */
+typedef uint64_t	xfs_rtbxlen_t;	/* rtbitmap extent length in rtextents */
 
 typedef int64_t		xfs_srtblock_t;	/* signed version of xfs_rtblock_t */
 
@@ -47,6 +51,7 @@ typedef void *		xfs_failaddr_t;
 #define	NULLRFSBLOCK	((xfs_rfsblock_t)-1)
 #define	NULLRTBLOCK	((xfs_rtblock_t)-1)
 #define	NULLFILEOFF	((xfs_fileoff_t)-1)
+#define	NULLRTEXTNO	((xfs_rtxnum_t)-1)
 
 #define	NULLAGBLOCK	((xfs_agblock_t)-1)
 #define	NULLAGNUMBER	((xfs_agnumber_t)-1)
@@ -145,6 +150,7 @@ typedef uint32_t	xfs_dqid_t;
  */
 #define	XFS_NBBYLOG	3		/* log2(NBBY) */
 #define	XFS_WORDLOG	2		/* log2(sizeof(xfs_rtword_t)) */
+#define	XFS_SUMINFOLOG	2		/* log2(sizeof(xfs_suminfo_t)) */
 #define	XFS_NBWORDLOG	(XFS_NBBYLOG + XFS_WORDLOG)
 #define	XFS_NBWORD	(1 << XFS_NBWORDLOG)
 #define	XFS_WORDMASK	((1 << XFS_WORDLOG) - 1)
@@ -229,8 +235,8 @@ bool xfs_verify_ino(struct xfs_mount *mp, xfs_ino_t ino);
 bool xfs_internal_inum(struct xfs_mount *mp, xfs_ino_t ino);
 bool xfs_verify_dir_ino(struct xfs_mount *mp, xfs_ino_t ino);
 bool xfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno);
-bool xfs_verify_rtext(struct xfs_mount *mp, xfs_rtblock_t rtbno,
-		xfs_rtblock_t len);
+bool xfs_verify_rtbext(struct xfs_mount *mp, xfs_rtblock_t rtbno,
+		xfs_filblks_t len);
 bool xfs_verify_icount(struct xfs_mount *mp, unsigned long long icount);
 bool xfs_verify_dablk(struct xfs_mount *mp, xfs_fileoff_t off);
 void xfs_icount_range(struct xfs_mount *mp, unsigned long long *min,
diff --git a/fs/xfs/scrub/bmap.c b/fs/xfs/scrub/bmap.c
index 7558891557..06d8c1996a 100644
--- a/fs/xfs/scrub/bmap.c
+++ b/fs/xfs/scrub/bmap.c
@@ -410,7 +410,7 @@ xchk_bmap_iextent(
 
 	/* Make sure the extent points to a valid place. */
 	if (info->is_rt &&
-	    !xfs_verify_rtext(mp, irec->br_startblock, irec->br_blockcount))
+	    !xfs_verify_rtbext(mp, irec->br_startblock, irec->br_blockcount))
 		xchk_fblock_set_corrupt(info->sc, info->whichfork,
 				irec->br_startoff);
 	if (!info->is_rt &&
diff --git a/fs/xfs/scrub/fscounters.c b/fs/xfs/scrub/fscounters.c
index 05be757668..5799e9a94f 100644
--- a/fs/xfs/scrub/fscounters.c
+++ b/fs/xfs/scrub/fscounters.c
@@ -16,7 +16,7 @@
 #include "xfs_health.h"
 #include "xfs_btree.h"
 #include "xfs_ag.h"
-#include "xfs_rtalloc.h"
+#include "xfs_rtbitmap.h"
 #include "xfs_inode.h"
 #include "xfs_icache.h"
 #include "scrub/scrub.h"
diff --git a/fs/xfs/scrub/inode.c b/fs/xfs/scrub/inode.c
index 59d7912fb7..889f556bc9 100644
--- a/fs/xfs/scrub/inode.c
+++ b/fs/xfs/scrub/inode.c
@@ -20,6 +20,7 @@
 #include "xfs_reflink.h"
 #include "xfs_rmap.h"
 #include "xfs_bmap_util.h"
+#include "xfs_rtbitmap.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
 #include "scrub/btree.h"
@@ -225,7 +226,7 @@ xchk_inode_extsize(
 	 */
 	if ((flags & XFS_DIFLAG_RTINHERIT) &&
 	    (flags & XFS_DIFLAG_EXTSZINHERIT) &&
-	    value % sc->mp->m_sb.sb_rextsize > 0)
+	    xfs_extlen_to_rtxmod(sc->mp, value) > 0)
 		xchk_ino_set_warning(sc, ino);
 }
 
diff --git a/fs/xfs/scrub/rtbitmap.c b/fs/xfs/scrub/rtbitmap.c
index 008ddb599e..41a1d89ae8 100644
--- a/fs/xfs/scrub/rtbitmap.c
+++ b/fs/xfs/scrub/rtbitmap.c
@@ -11,7 +11,7 @@
 #include "xfs_mount.h"
 #include "xfs_log_format.h"
 #include "xfs_trans.h"
-#include "xfs_rtalloc.h"
+#include "xfs_rtbitmap.h"
 #include "xfs_inode.h"
 #include "xfs_bmap.h"
 #include "scrub/scrub.h"
@@ -48,12 +48,12 @@ xchk_rtbitmap_rec(
 {
 	struct xfs_scrub	*sc = priv;
 	xfs_rtblock_t		startblock;
-	xfs_rtblock_t		blockcount;
+	xfs_filblks_t		blockcount;
 
-	startblock = rec->ar_startext * mp->m_sb.sb_rextsize;
-	blockcount = rec->ar_extcount * mp->m_sb.sb_rextsize;
+	startblock = xfs_rtx_to_rtb(mp, rec->ar_startext);
+	blockcount = xfs_rtx_to_rtb(mp, rec->ar_extcount);
 
-	if (!xfs_verify_rtext(mp, startblock, blockcount))
+	if (!xfs_verify_rtbext(mp, startblock, blockcount))
 		xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
 	return 0;
 }
@@ -128,26 +128,22 @@ out:
 void
 xchk_xref_is_used_rt_space(
 	struct xfs_scrub	*sc,
-	xfs_rtblock_t		fsbno,
+	xfs_rtblock_t		rtbno,
 	xfs_extlen_t		len)
 {
-	xfs_rtblock_t		startext;
-	xfs_rtblock_t		endext;
-	xfs_rtblock_t		extcount;
+	xfs_rtxnum_t		startext;
+	xfs_rtxnum_t		endext;
 	bool			is_free;
 	int			error;
 
 	if (xchk_skip_xref(sc->sm))
 		return;
 
-	startext = fsbno;
-	endext = fsbno + len - 1;
-	do_div(startext, sc->mp->m_sb.sb_rextsize);
-	do_div(endext, sc->mp->m_sb.sb_rextsize);
-	extcount = endext - startext + 1;
+	startext = xfs_rtb_to_rtx(sc->mp, rtbno);
+	endext = xfs_rtb_to_rtx(sc->mp, rtbno + len - 1);
 	xfs_ilock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
-	error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, startext, extcount,
-			&is_free);
+	error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, startext,
+			endext - startext + 1, &is_free);
 	if (!xchk_should_check_xref(sc, &error, NULL))
 		goto out_unlock;
 	if (is_free)
diff --git a/fs/xfs/scrub/rtsummary.c b/fs/xfs/scrub/rtsummary.c
index 437ed9acbb..8b15c47408 100644
--- a/fs/xfs/scrub/rtsummary.c
+++ b/fs/xfs/scrub/rtsummary.c
@@ -13,7 +13,7 @@
 #include "xfs_inode.h"
 #include "xfs_log_format.h"
 #include "xfs_trans.h"
-#include "xfs_rtalloc.h"
+#include "xfs_rtbitmap.h"
 #include "xfs_bit.h"
 #include "xfs_bmap.h"
 #include "scrub/scrub.h"
@@ -81,34 +81,45 @@ typedef unsigned int xchk_rtsumoff_t;
 static inline int
 xfsum_load(
 	struct xfs_scrub	*sc,
-	xchk_rtsumoff_t		sumoff,
-	xfs_suminfo_t		*info)
+	xfs_rtsumoff_t		sumoff,
+	union xfs_suminfo_raw	*rawinfo)
 {
-	return xfile_obj_load(sc->xfile, info, sizeof(xfs_suminfo_t),
+	return xfile_obj_load(sc->xfile, rawinfo,
+			sizeof(union xfs_suminfo_raw),
 			sumoff << XFS_WORDLOG);
 }
 
 static inline int
 xfsum_store(
 	struct xfs_scrub	*sc,
-	xchk_rtsumoff_t		sumoff,
-	const xfs_suminfo_t	info)
+	xfs_rtsumoff_t		sumoff,
+	const union xfs_suminfo_raw rawinfo)
 {
-	return xfile_obj_store(sc->xfile, &info, sizeof(xfs_suminfo_t),
+	return xfile_obj_store(sc->xfile, &rawinfo,
+			sizeof(union xfs_suminfo_raw),
 			sumoff << XFS_WORDLOG);
 }
 
 static inline int
 xfsum_copyout(
 	struct xfs_scrub	*sc,
-	xchk_rtsumoff_t		sumoff,
-	xfs_suminfo_t		*info,
+	xfs_rtsumoff_t		sumoff,
+	union xfs_suminfo_raw	*rawinfo,
 	unsigned int		nr_words)
 {
-	return xfile_obj_load(sc->xfile, info, nr_words << XFS_WORDLOG,
+	return xfile_obj_load(sc->xfile, rawinfo, nr_words << XFS_WORDLOG,
 			sumoff << XFS_WORDLOG);
 }
 
+static inline xfs_suminfo_t
+xchk_rtsum_inc(
+	struct xfs_mount	*mp,
+	union xfs_suminfo_raw	*v)
+{
+	v->old += 1;
+	return v->old;
+}
+
 /* Update the summary file to reflect the free extent that we've accumulated. */
 STATIC int
 xchk_rtsum_record_free(
@@ -121,23 +132,24 @@ xchk_rtsum_record_free(
 	xfs_fileoff_t			rbmoff;
 	xfs_rtblock_t			rtbno;
 	xfs_filblks_t			rtlen;
-	xchk_rtsumoff_t			offs;
+	xfs_rtsumoff_t			offs;
 	unsigned int			lenlog;
-	xfs_suminfo_t			v = 0;
+	union xfs_suminfo_raw		v;
+	xfs_suminfo_t			value;
 	int				error = 0;
 
 	if (xchk_should_terminate(sc, &error))
 		return error;
 
 	/* Compute the relevant location in the rtsum file. */
-	rbmoff = XFS_BITTOBLOCK(mp, rec->ar_startext);
+	rbmoff = xfs_rtx_to_rbmblock(mp, rec->ar_startext);
 	lenlog = XFS_RTBLOCKLOG(rec->ar_extcount);
-	offs = XFS_SUMOFFS(mp, lenlog, rbmoff);
+	offs = xfs_rtsumoffs(mp, lenlog, rbmoff);
 
-	rtbno = rec->ar_startext * mp->m_sb.sb_rextsize;
-	rtlen = rec->ar_extcount * mp->m_sb.sb_rextsize;
+	rtbno = xfs_rtx_to_rtb(mp, rec->ar_startext);
+	rtlen = xfs_rtx_to_rtb(mp, rec->ar_extcount);
 
-	if (!xfs_verify_rtext(mp, rtbno, rtlen)) {
+	if (!xfs_verify_rtbext(mp, rtbno, rtlen)) {
 		xchk_ino_xref_set_corrupt(sc, mp->m_rbmip->i_ino);
 		return -EFSCORRUPTED;
 	}
@@ -147,9 +159,9 @@ xchk_rtsum_record_free(
 	if (error)
 		return error;
 
-	v++;
+	value = xchk_rtsum_inc(sc->mp, &v);
 	trace_xchk_rtsum_record_free(mp, rec->ar_startext, rec->ar_extcount,
-			lenlog, offs, v);
+			lenlog, offs, value);
 
 	return xfsum_store(sc, offs, v);
 }
@@ -160,12 +172,11 @@ xchk_rtsum_compute(
 	struct xfs_scrub	*sc)
 {
 	struct xfs_mount	*mp = sc->mp;
-	unsigned long long	rtbmp_bytes;
+	unsigned long long	rtbmp_blocks;
 
 	/* If the bitmap size doesn't match the computed size, bail. */
-	rtbmp_bytes = howmany_64(mp->m_sb.sb_rextents, NBBY);
-	if (roundup_64(rtbmp_bytes, mp->m_sb.sb_blocksize) !=
-			mp->m_rbmip->i_disk_size)
+	rtbmp_blocks = xfs_rtbitmap_blockcount(mp, mp->m_sb.sb_rextents);
+	if (XFS_FSB_TO_B(mp, rtbmp_blocks) != mp->m_rbmip->i_disk_size)
 		return -EFSCORRUPTED;
 
 	return xfs_rtalloc_query_all(sc->mp, sc->tp, xchk_rtsum_record_free,
@@ -177,14 +188,18 @@ STATIC int
 xchk_rtsum_compare(
 	struct xfs_scrub	*sc)
 {
+	struct xfs_rtalloc_args args = {
+		.mp		= sc->mp,
+		.tp		= sc->tp,
+	};
 	struct xfs_mount	*mp = sc->mp;
-	struct xfs_buf		*bp;
 	struct xfs_bmbt_irec	map;
 	xfs_fileoff_t		off;
 	xchk_rtsumoff_t		sumoff = 0;
 	int			nmap;
 
 	for (off = 0; off < XFS_B_TO_FSB(mp, mp->m_rsumsize); off++) {
+		union xfs_suminfo_raw *ondisk_info;
 		int		error = 0;
 
 		if (xchk_should_terminate(sc, &error))
@@ -205,22 +220,23 @@ xchk_rtsum_compare(
 		}
 
 		/* Read a block's worth of ondisk rtsummary file. */
-		error = xfs_rtbuf_get(mp, sc->tp, off, 1, &bp);
+		error = xfs_rtsummary_read_buf(&args, off);
 		if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, off, &error))
 			return error;
 
 		/* Read a block's worth of computed rtsummary file. */
 		error = xfsum_copyout(sc, sumoff, sc->buf, mp->m_blockwsize);
 		if (error) {
-			xfs_trans_brelse(sc->tp, bp);
+			xfs_rtbuf_cache_relse(&args);
 			return error;
 		}
 
-		if (memcmp(bp->b_addr, sc->buf,
+		ondisk_info = xfs_rsumblock_infoptr(&args, 0);
+		if (memcmp(ondisk_info, sc->buf,
 					mp->m_blockwsize << XFS_WORDLOG) != 0)
 			xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, off);
 
-		xfs_trans_brelse(sc->tp, bp);
+		xfs_rtbuf_cache_relse(&args);
 		sumoff += mp->m_blockwsize;
 	}
 
diff --git a/fs/xfs/scrub/trace.c b/fs/xfs/scrub/trace.c
index 46249e7b17..29afa48512 100644
--- a/fs/xfs/scrub/trace.c
+++ b/fs/xfs/scrub/trace.c
@@ -13,6 +13,7 @@
 #include "xfs_inode.h"
 #include "xfs_btree.h"
 #include "xfs_ag.h"
+#include "xfs_rtbitmap.h"
 #include "scrub/scrub.h"
 #include "scrub/xfile.h"
 #include "scrub/xfarray.h"
diff --git a/fs/xfs/scrub/trace.h b/fs/xfs/scrub/trace.h
index cbd4d01e25..4a8bc6f3c8 100644
--- a/fs/xfs/scrub/trace.h
+++ b/fs/xfs/scrub/trace.h
@@ -1036,17 +1036,18 @@ TRACE_EVENT(xfarray_sort_stats,
 
 #ifdef CONFIG_XFS_RT
 TRACE_EVENT(xchk_rtsum_record_free,
-	TP_PROTO(struct xfs_mount *mp, xfs_rtblock_t start,
-		 uint64_t len, unsigned int log, loff_t pos, xfs_suminfo_t v),
-	TP_ARGS(mp, start, len, log, pos, v),
+	TP_PROTO(struct xfs_mount *mp, xfs_rtxnum_t start,
+		 xfs_rtbxlen_t len, unsigned int log, loff_t pos,
+		 xfs_suminfo_t value),
+	TP_ARGS(mp, start, len, log, pos, value),
 	TP_STRUCT__entry(
 		__field(dev_t, dev)
 		__field(dev_t, rtdev)
-		__field(xfs_rtblock_t, start)
+		__field(xfs_rtxnum_t, start)
 		__field(unsigned long long, len)
 		__field(unsigned int, log)
 		__field(loff_t, pos)
-		__field(xfs_suminfo_t, v)
+		__field(xfs_suminfo_t, value)
 	),
 	TP_fast_assign(
 		__entry->dev = mp->m_super->s_dev;
@@ -1055,7 +1056,7 @@ TRACE_EVENT(xchk_rtsum_record_free,
 		__entry->len = len;
 		__entry->log = log;
 		__entry->pos = pos;
-		__entry->v = v;
+		__entry->value = value;
 	),
 	TP_printk("dev %d:%d rtdev %d:%d rtx 0x%llx rtxcount 0x%llx log %u rsumpos 0x%llx sumcount %u",
 		  MAJOR(__entry->dev), MINOR(__entry->dev),
@@ -1064,7 +1065,7 @@ TRACE_EVENT(xchk_rtsum_record_free,
 		  __entry->len,
 		  __entry->log,
 		  __entry->pos,
-		  __entry->v)
+		  __entry->value)
 );
 #endif /* CONFIG_XFS_RT */
 
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index fcefab6872..731260a5af 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -28,6 +28,7 @@
 #include "xfs_icache.h"
 #include "xfs_iomap.h"
 #include "xfs_reflink.h"
+#include "xfs_rtbitmap.h"
 
 /* Kernel only BMAP related definitions and functions */
 
@@ -75,28 +76,28 @@ xfs_bmap_rtalloc(
 {
 	struct xfs_mount	*mp = ap->ip->i_mount;
 	xfs_fileoff_t		orig_offset = ap->offset;
-	xfs_rtblock_t		rtb;
-	xfs_extlen_t		prod = 0;  /* product factor for allocators */
+	xfs_rtxnum_t		rtx;
+	xfs_rtxlen_t		prod = 0;  /* product factor for allocators */
 	xfs_extlen_t		mod = 0;   /* product factor for allocators */
-	xfs_extlen_t		ralen = 0; /* realtime allocation length */
+	xfs_rtxlen_t		ralen = 0; /* realtime allocation length */
 	xfs_extlen_t		align;     /* minimum allocation alignment */
 	xfs_extlen_t		orig_length = ap->length;
 	xfs_extlen_t		minlen = mp->m_sb.sb_rextsize;
-	xfs_extlen_t		raminlen;
+	xfs_rtxlen_t		raminlen;
 	bool			rtlocked = false;
 	bool			ignore_locality = false;
 	int			error;
 
 	align = xfs_get_extsz_hint(ap->ip);
 retry:
-	prod = align / mp->m_sb.sb_rextsize;
+	prod = xfs_extlen_to_rtxlen(mp, align);
 	error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev,
 					align, 1, ap->eof, 0,
 					ap->conv, &ap->offset, &ap->length);
 	if (error)
 		return error;
 	ASSERT(ap->length);
-	ASSERT(ap->length % mp->m_sb.sb_rextsize == 0);
+	ASSERT(xfs_extlen_to_rtxmod(mp, ap->length) == 0);
 
 	/*
 	 * If we shifted the file offset downward to satisfy an extent size
@@ -116,17 +117,14 @@ retry:
 		prod = 1;
 	/*
 	 * Set ralen to be the actual requested length in rtextents.
-	 */
-	ralen = ap->length / mp->m_sb.sb_rextsize;
-	/*
+	 *
 	 * If the old value was close enough to XFS_BMBT_MAX_EXTLEN that
 	 * we rounded up to it, cut it back so it's valid again.
 	 * Note that if it's a really large request (bigger than
 	 * XFS_BMBT_MAX_EXTLEN), we don't hear about that number, and can't
 	 * adjust the starting point to match it.
 	 */
-	if (ralen * mp->m_sb.sb_rextsize >= XFS_MAX_BMBT_EXTLEN)
-		ralen = XFS_MAX_BMBT_EXTLEN / mp->m_sb.sb_rextsize;
+	ralen = xfs_extlen_to_rtxlen(mp, min(ap->length, XFS_MAX_BMBT_EXTLEN));
 
 	/*
 	 * Lock out modifications to both the RT bitmap and summary inodes
@@ -144,12 +142,10 @@ retry:
 	 * pick an extent that will space things out in the rt area.
 	 */
 	if (ap->eof && ap->offset == 0) {
-		xfs_rtblock_t rtx; /* realtime extent no */
-
 		error = xfs_rtpick_extent(mp, ap->tp, ralen, &rtx);
 		if (error)
 			return error;
-		ap->blkno = rtx * mp->m_sb.sb_rextsize;
+		ap->blkno = xfs_rtx_to_rtb(mp, rtx);
 	} else {
 		ap->blkno = 0;
 	}
@@ -160,20 +156,18 @@ retry:
 	 * Realtime allocation, done through xfs_rtallocate_extent.
 	 */
 	if (ignore_locality)
-		ap->blkno = 0;
+		rtx = 0;
 	else
-		do_div(ap->blkno, mp->m_sb.sb_rextsize);
-	rtb = ap->blkno;
-	ap->length = ralen;
-	raminlen = max_t(xfs_extlen_t, 1, minlen / mp->m_sb.sb_rextsize);
-	error = xfs_rtallocate_extent(ap->tp, ap->blkno, raminlen, ap->length,
-			&ralen, ap->wasdel, prod, &rtb);
+		rtx = xfs_rtb_to_rtx(mp, ap->blkno);
+	raminlen = max_t(xfs_rtxlen_t, 1, xfs_extlen_to_rtxlen(mp, minlen));
+	error = xfs_rtallocate_extent(ap->tp, rtx, raminlen, ralen, &ralen,
+			ap->wasdel, prod, &rtx);
 	if (error)
 		return error;
 
-	if (rtb != NULLRTBLOCK) {
-		ap->blkno = rtb * mp->m_sb.sb_rextsize;
-		ap->length = ralen * mp->m_sb.sb_rextsize;
+	if (rtx != NULLRTEXTNO) {
+		ap->blkno = xfs_rtx_to_rtb(mp, rtx);
+		ap->length = xfs_rtxlen_to_extlen(mp, ralen);
 		ap->ip->i_nblocks += ap->length;
 		xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
 		if (ap->wasdel)
@@ -690,7 +684,7 @@ 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;
@@ -780,12 +774,10 @@ xfs_alloc_file_space(
 {
 	xfs_mount_t		*mp = ip->i_mount;
 	xfs_off_t		count;
-	xfs_filblks_t		allocated_fsb;
 	xfs_filblks_t		allocatesize_fsb;
 	xfs_extlen_t		extsz, temp;
 	xfs_fileoff_t		startoffset_fsb;
 	xfs_fileoff_t		endoffset_fsb;
-	int			nimaps;
 	int			rt;
 	xfs_trans_t		*tp;
 	xfs_bmbt_irec_t		imaps[1], *imapp;
@@ -808,7 +800,6 @@ xfs_alloc_file_space(
 
 	count = len;
 	imapp = &imaps[0];
-	nimaps = 1;
 	startoffset_fsb	= XFS_B_TO_FSBT(mp, offset);
 	endoffset_fsb = XFS_B_TO_FSB(mp, offset + count);
 	allocatesize_fsb = endoffset_fsb - startoffset_fsb;
@@ -819,6 +810,7 @@ xfs_alloc_file_space(
 	while (allocatesize_fsb && !error) {
 		xfs_fileoff_t	s, e;
 		unsigned int	dblocks, rblocks, resblks;
+		int		nimaps = 1;
 
 		/*
 		 * Determine space reservations for data/realtime.
@@ -884,15 +876,19 @@ xfs_alloc_file_space(
 		if (error)
 			break;
 
-		allocated_fsb = imapp->br_blockcount;
-
-		if (nimaps == 0) {
-			error = -ENOSPC;
-			break;
+		/*
+		 * If the allocator cannot find a single free extent large
+		 * enough to cover the start block of the requested range,
+		 * xfs_bmapi_write will return 0 but leave *nimaps set to 0.
+		 *
+		 * In that case we simply need to keep looping with the same
+		 * startoffset_fsb so that one of the following allocations
+		 * will eventually reach the requested range.
+		 */
+		if (nimaps) {
+			startoffset_fsb += imapp->br_blockcount;
+			allocatesize_fsb -= imapp->br_blockcount;
 		}
-
-		startoffset_fsb += allocated_fsb;
-		allocatesize_fsb -= allocated_fsb;
 	}
 
 	return error;
@@ -989,10 +985,8 @@ xfs_free_file_space(
 
 	/* We can only free complete realtime extents. */
 	if (XFS_IS_REALTIME_INODE(ip) && mp->m_sb.sb_rextsize > 1) {
-		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);
 	}
 
 	/*
@@ -1644,7 +1638,7 @@ xfs_swap_extents(
 	uint64_t		f;
 	int			resblks = 0;
 	unsigned int		flags = 0;
-	struct timespec64	ctime;
+	struct timespec64	ctime, mtime;
 
 	/*
 	 * Lock the inodes against other IO, page faults and truncate to
@@ -1758,10 +1752,11 @@ xfs_swap_extents(
 	 * under it.
 	 */
 	ctime = inode_get_ctime(VFS_I(ip));
+	mtime = inode_get_mtime(VFS_I(ip));
 	if ((sbp->bs_ctime.tv_sec != ctime.tv_sec) ||
 	    (sbp->bs_ctime.tv_nsec != ctime.tv_nsec) ||
-	    (sbp->bs_mtime.tv_sec != VFS_I(ip)->i_mtime.tv_sec) ||
-	    (sbp->bs_mtime.tv_nsec != VFS_I(ip)->i_mtime.tv_nsec)) {
+	    (sbp->bs_mtime.tv_sec != mtime.tv_sec) ||
+	    (sbp->bs_mtime.tv_nsec != mtime.tv_nsec)) {
 		error = -EBUSY;
 		goto out_trans_cancel;
 	}
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index c1ece4a08f..545c7991b9 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -1913,8 +1913,7 @@ xfs_buftarg_shrink_scan(
 	struct shrinker		*shrink,
 	struct shrink_control	*sc)
 {
-	struct xfs_buftarg	*btp = container_of(shrink,
-					struct xfs_buftarg, bt_shrinker);
+	struct xfs_buftarg	*btp = shrink->private_data;
 	LIST_HEAD(dispose);
 	unsigned long		freed;
 
@@ -1936,8 +1935,7 @@ xfs_buftarg_shrink_count(
 	struct shrinker		*shrink,
 	struct shrink_control	*sc)
 {
-	struct xfs_buftarg	*btp = container_of(shrink,
-					struct xfs_buftarg, bt_shrinker);
+	struct xfs_buftarg	*btp = shrink->private_data;
 	return list_lru_shrink_count(&btp->bt_lru, sc);
 }
 
@@ -1945,17 +1943,15 @@ void
 xfs_free_buftarg(
 	struct xfs_buftarg	*btp)
 {
-	struct block_device	*bdev = btp->bt_bdev;
-
-	unregister_shrinker(&btp->bt_shrinker);
+	shrinker_free(btp->bt_shrinker);
 	ASSERT(percpu_counter_sum(&btp->bt_io_count) == 0);
 	percpu_counter_destroy(&btp->bt_io_count);
 	list_lru_destroy(&btp->bt_lru);
 
 	fs_put_dax(btp->bt_daxdev, btp->bt_mount);
 	/* the main block device is closed by kill_block_super */
-	if (bdev != btp->bt_mount->m_super->s_bdev)
-		blkdev_put(bdev, btp->bt_mount->m_super);
+	if (btp->bt_bdev != btp->bt_mount->m_super->s_bdev)
+		bdev_release(btp->bt_bdev_handle);
 
 	kmem_free(btp);
 }
@@ -1990,16 +1986,15 @@ xfs_setsize_buftarg(
  */
 STATIC int
 xfs_setsize_buftarg_early(
-	xfs_buftarg_t		*btp,
-	struct block_device	*bdev)
+	xfs_buftarg_t		*btp)
 {
-	return xfs_setsize_buftarg(btp, bdev_logical_block_size(bdev));
+	return xfs_setsize_buftarg(btp, bdev_logical_block_size(btp->bt_bdev));
 }
 
 struct xfs_buftarg *
 xfs_alloc_buftarg(
 	struct xfs_mount	*mp,
-	struct block_device	*bdev)
+	struct bdev_handle	*bdev_handle)
 {
 	xfs_buftarg_t		*btp;
 	const struct dax_holder_operations *ops = NULL;
@@ -2010,9 +2005,10 @@ xfs_alloc_buftarg(
 	btp = kmem_zalloc(sizeof(*btp), KM_NOFS);
 
 	btp->bt_mount = mp;
-	btp->bt_dev =  bdev->bd_dev;
-	btp->bt_bdev = bdev;
-	btp->bt_daxdev = fs_dax_get_by_bdev(bdev, &btp->bt_dax_part_off,
+	btp->bt_bdev_handle = bdev_handle;
+	btp->bt_dev = bdev_handle->bdev->bd_dev;
+	btp->bt_bdev = bdev_handle->bdev;
+	btp->bt_daxdev = fs_dax_get_by_bdev(btp->bt_bdev, &btp->bt_dax_part_off,
 					    mp, ops);
 
 	/*
@@ -2022,7 +2018,7 @@ xfs_alloc_buftarg(
 	ratelimit_state_init(&btp->bt_ioerror_rl, 30 * HZ,
 			     DEFAULT_RATELIMIT_BURST);
 
-	if (xfs_setsize_buftarg_early(btp, bdev))
+	if (xfs_setsize_buftarg_early(btp))
 		goto error_free;
 
 	if (list_lru_init(&btp->bt_lru))
@@ -2031,13 +2027,17 @@ xfs_alloc_buftarg(
 	if (percpu_counter_init(&btp->bt_io_count, 0, GFP_KERNEL))
 		goto error_lru;
 
-	btp->bt_shrinker.count_objects = xfs_buftarg_shrink_count;
-	btp->bt_shrinker.scan_objects = xfs_buftarg_shrink_scan;
-	btp->bt_shrinker.seeks = DEFAULT_SEEKS;
-	btp->bt_shrinker.flags = SHRINKER_NUMA_AWARE;
-	if (register_shrinker(&btp->bt_shrinker, "xfs-buf:%s",
-			      mp->m_super->s_id))
+	btp->bt_shrinker = shrinker_alloc(SHRINKER_NUMA_AWARE, "xfs-buf:%s",
+					  mp->m_super->s_id);
+	if (!btp->bt_shrinker)
 		goto error_pcpu;
+
+	btp->bt_shrinker->count_objects = xfs_buftarg_shrink_count;
+	btp->bt_shrinker->scan_objects = xfs_buftarg_shrink_scan;
+	btp->bt_shrinker->private_data = btp;
+
+	shrinker_register(btp->bt_shrinker);
+
 	return btp;
 
 error_pcpu:
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index df8f47953b..c86e164196 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -98,6 +98,7 @@ typedef unsigned int xfs_buf_flags_t;
  */
 typedef struct xfs_buftarg {
 	dev_t			bt_dev;
+	struct bdev_handle	*bt_bdev_handle;
 	struct block_device	*bt_bdev;
 	struct dax_device	*bt_daxdev;
 	u64			bt_dax_part_off;
@@ -108,7 +109,7 @@ typedef struct xfs_buftarg {
 	size_t			bt_logical_sectormask;
 
 	/* LRU control structures */
-	struct shrinker		bt_shrinker;
+	struct shrinker		*bt_shrinker;
 	struct list_lru		bt_lru;
 
 	struct percpu_counter	bt_io_count;
@@ -364,7 +365,7 @@ xfs_buf_update_cksum(struct xfs_buf *bp, unsigned long cksum_offset)
  *	Handling of buftargs.
  */
 struct xfs_buftarg *xfs_alloc_buftarg(struct xfs_mount *mp,
-		struct block_device *bdev);
+		struct bdev_handle *bdev_handle);
 extern void xfs_free_buftarg(struct xfs_buftarg *);
 extern void xfs_buftarg_wait(struct xfs_buftarg *);
 extern void xfs_buftarg_drain(struct xfs_buftarg *);
diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index ac6ba64662..a013b87ab8 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -562,7 +562,8 @@ xfs_dquot_from_disk(
 	struct xfs_dquot	*dqp,
 	struct xfs_buf		*bp)
 {
-	struct xfs_disk_dquot	*ddqp = bp->b_addr + dqp->q_bufoffset;
+	struct xfs_dqblk	*dqb = xfs_buf_offset(bp, dqp->q_bufoffset);
+	struct xfs_disk_dquot	*ddqp = &dqb->dd_diskdq;
 
 	/*
 	 * Ensure that we got the type and ID we were looking for.
@@ -1250,7 +1251,7 @@ xfs_qm_dqflush(
 	}
 
 	/* Flush the incore dquot to the ondisk buffer. */
-	dqblk = bp->b_addr + dqp->q_bufoffset;
+	dqblk = xfs_buf_offset(bp, dqp->q_bufoffset);
 	xfs_dquot_to_disk(&dqblk->dd_diskdq, dqp);
 
 	/*
diff --git a/fs/xfs/xfs_dquot_item_recover.c b/fs/xfs/xfs_dquot_item_recover.c
index 8966ba8423..2c2720ce69 100644
--- a/fs/xfs/xfs_dquot_item_recover.c
+++ b/fs/xfs/xfs_dquot_item_recover.c
@@ -19,6 +19,7 @@
 #include "xfs_log.h"
 #include "xfs_log_priv.h"
 #include "xfs_log_recover.h"
+#include "xfs_error.h"
 
 STATIC void
 xlog_recover_dquot_ra_pass2(
@@ -65,6 +66,7 @@ xlog_recover_dquot_commit_pass2(
 {
 	struct xfs_mount		*mp = log->l_mp;
 	struct xfs_buf			*bp;
+	struct xfs_dqblk		*dqb;
 	struct xfs_disk_dquot		*ddq, *recddq;
 	struct xfs_dq_logformat		*dq_f;
 	xfs_failaddr_t			fa;
@@ -130,14 +132,14 @@ xlog_recover_dquot_commit_pass2(
 		return error;
 
 	ASSERT(bp);
-	ddq = xfs_buf_offset(bp, dq_f->qlf_boffset);
+	dqb = xfs_buf_offset(bp, dq_f->qlf_boffset);
+	ddq = &dqb->dd_diskdq;
 
 	/*
 	 * If the dquot has an LSN in it, recover the dquot only if it's less
 	 * than the lsn of the transaction we are replaying.
 	 */
 	if (xfs_has_crc(mp)) {
-		struct xfs_dqblk *dqb = (struct xfs_dqblk *)ddq;
 		xfs_lsn_t	lsn = be64_to_cpu(dqb->dd_lsn);
 
 		if (lsn && lsn != -1 && XFS_LSN_CMP(lsn, current_lsn) >= 0) {
@@ -147,10 +149,23 @@ xlog_recover_dquot_commit_pass2(
 
 	memcpy(ddq, recddq, item->ri_buf[1].i_len);
 	if (xfs_has_crc(mp)) {
-		xfs_update_cksum((char *)ddq, sizeof(struct xfs_dqblk),
+		xfs_update_cksum((char *)dqb, sizeof(struct xfs_dqblk),
 				 XFS_DQUOT_CRC_OFF);
 	}
 
+	/* Validate the recovered dquot. */
+	fa = xfs_dqblk_verify(log->l_mp, dqb, dq_f->qlf_id);
+	if (fa) {
+		XFS_CORRUPTION_ERROR("Bad dquot after recovery",
+				XFS_ERRLEVEL_LOW, mp, dqb,
+				sizeof(struct xfs_dqblk));
+		xfs_alert(mp,
+ "Metadata corruption detected at %pS, dquot 0x%x",
+				fa, dq_f->qlf_id);
+		error = -EFSCORRUPTED;
+		goto out_release;
+	}
+
 	ASSERT(dq_f->qlf_size == 2);
 	ASSERT(bp->b_mount == mp);
 	bp->b_flags |= _XBF_LOGRECOVERY;
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 203700278d..e33e5e13b9 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -214,6 +214,43 @@ xfs_ilock_iocb(
 	return 0;
 }
 
+static int
+xfs_ilock_iocb_for_write(
+	struct kiocb		*iocb,
+	unsigned int		*lock_mode)
+{
+	ssize_t			ret;
+	struct xfs_inode	*ip = XFS_I(file_inode(iocb->ki_filp));
+
+	ret = xfs_ilock_iocb(iocb, *lock_mode);
+	if (ret)
+		return ret;
+
+	if (*lock_mode == XFS_IOLOCK_EXCL)
+		return 0;
+	if (!xfs_iflags_test(ip, XFS_IREMAPPING))
+		return 0;
+
+	xfs_iunlock(ip, *lock_mode);
+	*lock_mode = XFS_IOLOCK_EXCL;
+	return xfs_ilock_iocb(iocb, *lock_mode);
+}
+
+static unsigned int
+xfs_ilock_for_write_fault(
+	struct xfs_inode	*ip)
+{
+	/* get a shared lock if no remapping in progress */
+	xfs_ilock(ip, XFS_MMAPLOCK_SHARED);
+	if (!xfs_iflags_test(ip, XFS_IREMAPPING))
+		return XFS_MMAPLOCK_SHARED;
+
+	/* wait for remapping to complete */
+	xfs_iunlock(ip, XFS_MMAPLOCK_SHARED);
+	xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
+	return XFS_MMAPLOCK_EXCL;
+}
+
 STATIC ssize_t
 xfs_file_dio_read(
 	struct kiocb		*iocb,
@@ -551,7 +588,7 @@ xfs_file_dio_write_aligned(
 	unsigned int		iolock = XFS_IOLOCK_SHARED;
 	ssize_t			ret;
 
-	ret = xfs_ilock_iocb(iocb, iolock);
+	ret = xfs_ilock_iocb_for_write(iocb, &iolock);
 	if (ret)
 		return ret;
 	ret = xfs_file_write_checks(iocb, from, &iolock);
@@ -618,7 +655,7 @@ retry_exclusive:
 		flags = IOMAP_DIO_FORCE_WAIT;
 	}
 
-	ret = xfs_ilock_iocb(iocb, iolock);
+	ret = xfs_ilock_iocb_for_write(iocb, &iolock);
 	if (ret)
 		return ret;
 
@@ -1180,7 +1217,7 @@ xfs_file_remap_range(
 	if (xfs_file_sync_writes(file_in) || xfs_file_sync_writes(file_out))
 		xfs_log_force_inode(dest);
 out_unlock:
-	xfs_iunlock2_io_mmap(src, dest);
+	xfs_iunlock2_remapping(src, dest);
 	if (ret)
 		trace_xfs_reflink_remap_range_error(dest, ret, _RET_IP_);
 	return remapped > 0 ? remapped : ret;
@@ -1328,6 +1365,7 @@ __xfs_filemap_fault(
 	struct inode		*inode = file_inode(vmf->vma->vm_file);
 	struct xfs_inode	*ip = XFS_I(inode);
 	vm_fault_t		ret;
+	unsigned int		lock_mode = 0;
 
 	trace_xfs_filemap_fault(ip, order, write_fault);
 
@@ -1336,25 +1374,24 @@ __xfs_filemap_fault(
 		file_update_time(vmf->vma->vm_file);
 	}
 
+	if (IS_DAX(inode) || write_fault)
+		lock_mode = xfs_ilock_for_write_fault(XFS_I(inode));
+
 	if (IS_DAX(inode)) {
 		pfn_t pfn;
 
-		xfs_ilock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
 		ret = xfs_dax_fault(vmf, order, write_fault, &pfn);
 		if (ret & VM_FAULT_NEEDDSYNC)
 			ret = dax_finish_sync_fault(vmf, order, pfn);
-		xfs_iunlock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
+	} else if (write_fault) {
+		ret = iomap_page_mkwrite(vmf, &xfs_page_mkwrite_iomap_ops);
 	} else {
-		if (write_fault) {
-			xfs_ilock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
-			ret = iomap_page_mkwrite(vmf,
-					&xfs_page_mkwrite_iomap_ops);
-			xfs_iunlock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
-		} else {
-			ret = filemap_fault(vmf);
-		}
+		ret = filemap_fault(vmf);
 	}
 
+	if (lock_mode)
+		xfs_iunlock(XFS_I(inode), lock_mode);
+
 	if (write_fault)
 		sb_end_pagefault(inode->i_sb);
 	return ret;
diff --git a/fs/xfs/xfs_fsmap.c b/fs/xfs/xfs_fsmap.c
index 736e5545f5..5a72217f5f 100644
--- a/fs/xfs/xfs_fsmap.c
+++ b/fs/xfs/xfs_fsmap.c
@@ -23,7 +23,7 @@
 #include "xfs_refcount.h"
 #include "xfs_refcount_btree.h"
 #include "xfs_alloc_btree.h"
-#include "xfs_rtalloc.h"
+#include "xfs_rtbitmap.h"
 #include "xfs_ag.h"
 
 /* Convert an xfs_fsmap to an fsmap. */
@@ -483,11 +483,11 @@ xfs_getfsmap_rtdev_rtbitmap_helper(
 	xfs_rtblock_t			rtbno;
 	xfs_daddr_t			rec_daddr, len_daddr;
 
-	rtbno = rec->ar_startext * mp->m_sb.sb_rextsize;
+	rtbno = xfs_rtx_to_rtb(mp, rec->ar_startext);
 	rec_daddr = XFS_FSB_TO_BB(mp, rtbno);
 	irec.rm_startblock = rtbno;
 
-	rtbno = rec->ar_extcount * mp->m_sb.sb_rextsize;
+	rtbno = xfs_rtx_to_rtb(mp, rec->ar_extcount);
 	len_daddr = XFS_FSB_TO_BB(mp, rtbno);
 	irec.rm_blockcount = rtbno;
 
@@ -514,7 +514,7 @@ xfs_getfsmap_rtdev_rtbitmap(
 	uint64_t			eofs;
 	int				error;
 
-	eofs = XFS_FSB_TO_BB(mp, mp->m_sb.sb_rextents * mp->m_sb.sb_rextsize);
+	eofs = XFS_FSB_TO_BB(mp, xfs_rtx_to_rtb(mp, mp->m_sb.sb_rextents));
 	if (keys[0].fmr_physical >= eofs)
 		return 0;
 	start_rtb = XFS_BB_TO_FSBT(mp,
@@ -539,11 +539,8 @@ xfs_getfsmap_rtdev_rtbitmap(
 	 * Set up query parameters to return free rtextents covering the range
 	 * we want.
 	 */
-	alow.ar_startext = start_rtb;
-	ahigh.ar_startext = end_rtb;
-	do_div(alow.ar_startext, mp->m_sb.sb_rextsize);
-	if (do_div(ahigh.ar_startext, mp->m_sb.sb_rextsize))
-		ahigh.ar_startext++;
+	alow.ar_startext = xfs_rtb_to_rtx(mp, start_rtb);
+	ahigh.ar_startext = xfs_rtb_to_rtxup(mp, end_rtb);
 	error = xfs_rtalloc_query_range(mp, tp, &alow, &ahigh,
 			xfs_getfsmap_rtdev_rtbitmap_helper, info);
 	if (error)
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 3c210ac837..dba514a2c8 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -2165,8 +2165,7 @@ xfs_inodegc_shrinker_count(
 	struct shrinker		*shrink,
 	struct shrink_control	*sc)
 {
-	struct xfs_mount	*mp = container_of(shrink, struct xfs_mount,
-						   m_inodegc_shrinker);
+	struct xfs_mount	*mp = shrink->private_data;
 	struct xfs_inodegc	*gc;
 	int			cpu;
 
@@ -2187,8 +2186,7 @@ xfs_inodegc_shrinker_scan(
 	struct shrinker		*shrink,
 	struct shrink_control	*sc)
 {
-	struct xfs_mount	*mp = container_of(shrink, struct xfs_mount,
-						   m_inodegc_shrinker);
+	struct xfs_mount	*mp = shrink->private_data;
 	struct xfs_inodegc	*gc;
 	int			cpu;
 	bool			no_items = true;
@@ -2224,13 +2222,19 @@ int
 xfs_inodegc_register_shrinker(
 	struct xfs_mount	*mp)
 {
-	struct shrinker		*shrink = &mp->m_inodegc_shrinker;
+	mp->m_inodegc_shrinker = shrinker_alloc(SHRINKER_NONSLAB,
+						"xfs-inodegc:%s",
+						mp->m_super->s_id);
+	if (!mp->m_inodegc_shrinker)
+		return -ENOMEM;
+
+	mp->m_inodegc_shrinker->count_objects = xfs_inodegc_shrinker_count;
+	mp->m_inodegc_shrinker->scan_objects = xfs_inodegc_shrinker_scan;
+	mp->m_inodegc_shrinker->seeks = 0;
+	mp->m_inodegc_shrinker->batch = XFS_INODEGC_SHRINKER_BATCH;
+	mp->m_inodegc_shrinker->private_data = mp;
 
-	shrink->count_objects = xfs_inodegc_shrinker_count;
-	shrink->scan_objects = xfs_inodegc_shrinker_scan;
-	shrink->seeks = 0;
-	shrink->flags = SHRINKER_NONSLAB;
-	shrink->batch = XFS_INODEGC_SHRINKER_BATCH;
+	shrinker_register(mp->m_inodegc_shrinker);
 
-	return register_shrinker(shrink, "xfs-inodegc:%s", mp->m_super->s_id);
+	return 0;
 }
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 4d55f58d99..c0f1c89786 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -844,8 +844,8 @@ xfs_init_new_inode(
 	ASSERT(ip->i_nblocks == 0);
 
 	tv = inode_set_ctime_current(inode);
-	inode->i_mtime = tv;
-	inode->i_atime = tv;
+	inode_set_mtime_to_ts(inode, tv);
+	inode_set_atime_to_ts(inode, tv);
 
 	ip->i_extsize = 0;
 	ip->i_diflags = 0;
@@ -918,6 +918,13 @@ xfs_droplink(
 	xfs_trans_t *tp,
 	xfs_inode_t *ip)
 {
+	if (VFS_I(ip)->i_nlink == 0) {
+		xfs_alert(ip->i_mount,
+			  "%s: Attempt to drop inode (%llu) with nlink zero.",
+			  __func__, ip->i_ino);
+		return -EFSCORRUPTED;
+	}
+
 	xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
 
 	drop_nlink(VFS_I(ip));
@@ -3621,6 +3628,23 @@ xfs_iunlock2_io_mmap(
 		inode_unlock(VFS_I(ip1));
 }
 
+/* Drop the MMAPLOCK and the IOLOCK after a remap completes. */
+void
+xfs_iunlock2_remapping(
+	struct xfs_inode	*ip1,
+	struct xfs_inode	*ip2)
+{
+	xfs_iflags_clear(ip1, XFS_IREMAPPING);
+
+	if (ip1 != ip2)
+		xfs_iunlock(ip1, XFS_MMAPLOCK_SHARED);
+	xfs_iunlock(ip2, XFS_MMAPLOCK_EXCL);
+
+	if (ip1 != ip2)
+		inode_unlock_shared(VFS_I(ip1));
+	inode_unlock(VFS_I(ip2));
+}
+
 /*
  * Reload the incore inode list for this inode.  Caller should ensure that
  * the link count cannot change, either by taking ILOCK_SHARED or otherwise
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index 0c5bdb9115..3beb470f18 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -347,6 +347,14 @@ static inline bool xfs_inode_has_large_extent_counts(struct xfs_inode *ip)
 /* Quotacheck is running but inode has not been added to quota counts. */
 #define XFS_IQUOTAUNCHECKED	(1 << 14)
 
+/*
+ * Remap in progress. Callers that wish to update file data while
+ * holding a shared IOLOCK or MMAPLOCK must drop the lock and retake
+ * the lock in exclusive mode. Relocking the file will block until
+ * IREMAPPING is cleared.
+ */
+#define XFS_IREMAPPING		(1U << 15)
+
 /* All inode state flags related to inode reclaim. */
 #define XFS_ALL_IRECLAIM_FLAGS	(XFS_IRECLAIMABLE | \
 				 XFS_IRECLAIM | \
@@ -561,6 +569,14 @@ extern void xfs_setup_inode(struct xfs_inode *ip);
 extern void xfs_setup_iops(struct xfs_inode *ip);
 extern void xfs_diflags_to_iflags(struct xfs_inode *ip, bool init);
 
+static inline void xfs_update_stable_writes(struct xfs_inode *ip)
+{
+	if (bdev_stable_writes(xfs_inode_buftarg(ip)->bt_bdev))
+		mapping_set_stable_writes(VFS_I(ip)->i_mapping);
+	else
+		mapping_clear_stable_writes(VFS_I(ip)->i_mapping);
+}
+
 /*
  * When setting up a newly allocated inode, we need to call
  * xfs_finish_inode_setup() once the inode is fully instantiated at
@@ -595,6 +611,7 @@ void xfs_end_io(struct work_struct *work);
 
 int xfs_ilock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
 void xfs_iunlock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
+void xfs_iunlock2_remapping(struct xfs_inode *ip1, struct xfs_inode *ip2);
 
 static inline bool
 xfs_inode_unlinked_incomplete(
diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
index 127b2410eb..cd7803fda8 100644
--- a/fs/xfs/xfs_inode_item.c
+++ b/fs/xfs/xfs_inode_item.c
@@ -19,6 +19,7 @@
 #include "xfs_log.h"
 #include "xfs_log_priv.h"
 #include "xfs_error.h"
+#include "xfs_rtbitmap.h"
 
 #include <linux/iversion.h>
 
@@ -107,7 +108,7 @@ xfs_inode_item_precommit(
 	 */
 	if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
 	    (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) &&
-	    (ip->i_extsize % ip->i_mount->m_sb.sb_rextsize) > 0) {
+	    xfs_extlen_to_rtxmod(ip->i_mount, ip->i_extsize) > 0) {
 		ip->i_diflags &= ~(XFS_DIFLAG_EXTSIZE |
 				   XFS_DIFLAG_EXTSZINHERIT);
 		ip->i_extsize = 0;
@@ -526,8 +527,8 @@ xfs_inode_to_log_dinode(
 	to->di_projid_hi = ip->i_projid >> 16;
 
 	memset(to->di_pad3, 0, sizeof(to->di_pad3));
-	to->di_atime = xfs_inode_to_log_dinode_ts(ip, inode->i_atime);
-	to->di_mtime = xfs_inode_to_log_dinode_ts(ip, inode->i_mtime);
+	to->di_atime = xfs_inode_to_log_dinode_ts(ip, inode_get_atime(inode));
+	to->di_mtime = xfs_inode_to_log_dinode_ts(ip, inode_get_mtime(inode));
 	to->di_ctime = xfs_inode_to_log_dinode_ts(ip, inode_get_ctime(inode));
 	to->di_nlink = inode->i_nlink;
 	to->di_gen = inode->i_generation;
diff --git a/fs/xfs/xfs_inode_item_recover.c b/fs/xfs/xfs_inode_item_recover.c
index e6609067ef..144198a6b2 100644
--- a/fs/xfs/xfs_inode_item_recover.c
+++ b/fs/xfs/xfs_inode_item_recover.c
@@ -286,6 +286,7 @@ xlog_recover_inode_commit_pass2(
 	struct xfs_log_dinode		*ldip;
 	uint				isize;
 	int				need_free = 0;
+	xfs_failaddr_t			fa;
 
 	if (item->ri_buf[0].i_len == sizeof(struct xfs_inode_log_format)) {
 		in_f = item->ri_buf[0].i_addr;
@@ -530,8 +531,19 @@ out_owner_change:
 	    (dip->di_mode != 0))
 		error = xfs_recover_inode_owner_change(mp, dip, in_f,
 						       buffer_list);
-	/* re-generate the checksum. */
+	/* re-generate the checksum and validate the recovered inode. */
 	xfs_dinode_calc_crc(log->l_mp, dip);
+	fa = xfs_dinode_verify(log->l_mp, in_f->ilf_ino, dip);
+	if (fa) {
+		XFS_CORRUPTION_ERROR(
+			"Bad dinode after recovery",
+				XFS_ERRLEVEL_LOW, mp, dip, sizeof(*dip));
+		xfs_alert(mp,
+			"Metadata corruption detected at %pS, inode 0x%llx",
+			fa, in_f->ilf_ino);
+		error = -EFSCORRUPTED;
+		goto out_release;
+	}
 
 	ASSERT(bp->b_mount == mp);
 	bp->b_flags |= _XBF_LOGRECOVERY;
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 55bb01173c..6c3919687e 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -38,6 +38,7 @@
 #include "xfs_reflink.h"
 #include "xfs_ioctl.h"
 #include "xfs_xattr.h"
+#include "xfs_rtbitmap.h"
 
 #include <linux/mount.h>
 #include <linux/namei.h>
@@ -1004,7 +1005,7 @@ xfs_fill_fsxattr(
 		 * later.
 		 */
 		if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
-		    ip->i_extsize % mp->m_sb.sb_rextsize > 0) {
+		    xfs_extlen_to_rtxmod(mp, ip->i_extsize) > 0) {
 			fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE |
 					    FS_XFLAG_EXTSZINHERIT);
 			fa->fsx_extsize = 0;
@@ -1120,23 +1121,25 @@ xfs_ioctl_setattr_xflags(
 	struct fileattr		*fa)
 {
 	struct xfs_mount	*mp = ip->i_mount;
+	bool			rtflag = (fa->fsx_xflags & FS_XFLAG_REALTIME);
 	uint64_t		i_flags2;
 
-	/* Can't change realtime flag if any extents are allocated. */
-	if ((ip->i_df.if_nextents || ip->i_delayed_blks) &&
-	    XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
-		return -EINVAL;
+	if (rtflag != XFS_IS_REALTIME_INODE(ip)) {
+		/* Can't change realtime flag if any extents are allocated. */
+		if (ip->i_df.if_nextents || ip->i_delayed_blks)
+			return -EINVAL;
+	}
 
-	/* If realtime flag is set then must have realtime device */
-	if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
+	if (rtflag) {
+		/* If realtime flag is set then must have realtime device */
 		if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
-		    (ip->i_extsize % mp->m_sb.sb_rextsize))
+		    xfs_extlen_to_rtxmod(mp, ip->i_extsize))
 			return -EINVAL;
-	}
 
-	/* Clear reflink if we are actually able to set the rt flag. */
-	if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
-		ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK;
+		/* Clear reflink if we are actually able to set the rt flag. */
+		if (xfs_is_reflink_inode(ip))
+			ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK;
+	}
 
 	/* diflags2 only valid for v3 inodes. */
 	i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
@@ -1147,6 +1150,14 @@ xfs_ioctl_setattr_xflags(
 	ip->i_diflags2 = i_flags2;
 
 	xfs_diflags_to_iflags(ip, false);
+
+	/*
+	 * Make the stable writes flag match that of the device the inode
+	 * resides on when flipping the RT flag.
+	 */
+	if (rtflag != XFS_IS_REALTIME_INODE(ip) && S_ISREG(VFS_I(ip)->i_mode))
+		xfs_update_stable_writes(ip);
+
 	xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
 	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
 	XFS_STATS_INC(mp, xs_ig_attrchg);
diff --git a/fs/xfs/xfs_ioctl32.h b/fs/xfs/xfs_ioctl32.h
index c14852362f..052d0e888c 100644
--- a/fs/xfs/xfs_ioctl32.h
+++ b/fs/xfs/xfs_ioctl32.h
@@ -22,7 +22,7 @@
 /*
  * On intel, even if sizes match, alignment and/or padding may differ.
  */
-#if defined(CONFIG_IA64) || defined(CONFIG_X86_64)
+#if defined(CONFIG_X86_64)
 #define BROKEN_X86_ALIGNMENT
 #define __compat_packed __attribute__((packed))
 #else
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 2b3b05c28e..a0d77f5f51 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -572,8 +572,8 @@ xfs_vn_getattr(
 	stat->uid = vfsuid_into_kuid(vfsuid);
 	stat->gid = vfsgid_into_kgid(vfsgid);
 	stat->ino = ip->i_ino;
-	stat->atime = inode->i_atime;
-	stat->mtime = inode->i_mtime;
+	stat->atime = inode_get_atime(inode);
+	stat->mtime = inode_get_mtime(inode);
 	stat->ctime = inode_get_ctime(inode);
 	stat->blocks = XFS_FSB_TO_BB(mp, ip->i_nblocks + ip->i_delayed_blks);
 
@@ -1067,9 +1067,9 @@ xfs_vn_update_time(
 		now = current_time(inode);
 
 	if (flags & S_MTIME)
-		inode->i_mtime = now;
+		inode_set_mtime_to_ts(inode, now);
 	if (flags & S_ATIME)
-		inode->i_atime = now;
+		inode_set_atime_to_ts(inode, now);
 
 	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
 	xfs_trans_log_inode(tp, ip, log_flags);
@@ -1299,6 +1299,13 @@ xfs_setup_inode(
 	mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
 
 	/*
+	 * For real-time inodes update the stable write flags to that of the RT
+	 * device instead of the data device.
+	 */
+	if (S_ISREG(inode->i_mode) && XFS_IS_REALTIME_INODE(ip))
+		xfs_update_stable_writes(ip);
+
+	/*
 	 * If there is no attribute fork no ACL can exist on this inode,
 	 * and it can't have any file capabilities attached to it either.
 	 */
diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index f5377ba596..14462614fc 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -107,12 +107,12 @@ xfs_bulkstat_one_int(
 	buf->bs_size = ip->i_disk_size;
 
 	buf->bs_nlink = inode->i_nlink;
-	buf->bs_atime = inode->i_atime.tv_sec;
-	buf->bs_atime_nsec = inode->i_atime.tv_nsec;
-	buf->bs_mtime = inode->i_mtime.tv_sec;
-	buf->bs_mtime_nsec = inode->i_mtime.tv_nsec;
-	buf->bs_ctime = inode_get_ctime(inode).tv_sec;
-	buf->bs_ctime_nsec = inode_get_ctime(inode).tv_nsec;
+	buf->bs_atime = inode_get_atime_sec(inode);
+	buf->bs_atime_nsec = inode_get_atime_nsec(inode);
+	buf->bs_mtime = inode_get_mtime_sec(inode);
+	buf->bs_mtime_nsec = inode_get_mtime_nsec(inode);
+	buf->bs_ctime = inode_get_ctime_sec(inode);
+	buf->bs_ctime_nsec = inode_get_ctime_nsec(inode);
 	buf->bs_gen = inode->i_generation;
 	buf->bs_mode = inode->i_mode;
 
diff --git a/fs/xfs/xfs_linux.h b/fs/xfs/xfs_linux.h
index e9d317a3da..d7873e0360 100644
--- a/fs/xfs/xfs_linux.h
+++ b/fs/xfs/xfs_linux.h
@@ -198,6 +198,18 @@ static inline uint64_t howmany_64(uint64_t x, uint32_t y)
 	return x;
 }
 
+/* If @b is a power of 2, return log2(b).  Else return -1. */
+static inline int8_t log2_if_power2(unsigned long b)
+{
+	return is_power_of_2(b) ? ilog2(b) : -1;
+}
+
+/* If @b is a power of 2, return a mask of the lower bits, else return zero. */
+static inline unsigned long long mask64_if_power2(unsigned long b)
+{
+	return is_power_of_2(b) ? b - 1 : 0;
+}
+
 int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count,
 		char *data, enum req_op op);
 
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 51c100c861..ee206facf0 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -1893,9 +1893,7 @@ xlog_write_iclog(
 		 * the buffer manually, the code needs to be kept in sync
 		 * with the I/O completion path.
 		 */
-		xlog_state_done_syncing(iclog);
-		up(&iclog->ic_sema);
-		return;
+		goto sync;
 	}
 
 	/*
@@ -1925,20 +1923,17 @@ xlog_write_iclog(
 		 * avoid shutdown re-entering this path and erroring out again.
 		 */
 		if (log->l_targ != log->l_mp->m_ddev_targp &&
-		    blkdev_issue_flush(log->l_mp->m_ddev_targp->bt_bdev)) {
-			xlog_force_shutdown(log, SHUTDOWN_LOG_IO_ERROR);
-			return;
-		}
+		    blkdev_issue_flush(log->l_mp->m_ddev_targp->bt_bdev))
+			goto shutdown;
 	}
 	if (iclog->ic_flags & XLOG_ICL_NEED_FUA)
 		iclog->ic_bio.bi_opf |= REQ_FUA;
 
 	iclog->ic_flags &= ~(XLOG_ICL_NEED_FLUSH | XLOG_ICL_NEED_FUA);
 
-	if (xlog_map_iclog_data(&iclog->ic_bio, iclog->ic_data, count)) {
-		xlog_force_shutdown(log, SHUTDOWN_LOG_IO_ERROR);
-		return;
-	}
+	if (xlog_map_iclog_data(&iclog->ic_bio, iclog->ic_data, count))
+		goto shutdown;
+
 	if (is_vmalloc_addr(iclog->ic_data))
 		flush_kernel_vmap_range(iclog->ic_data, count);
 
@@ -1959,6 +1954,12 @@ xlog_write_iclog(
 	}
 
 	submit_bio(&iclog->ic_bio);
+	return;
+shutdown:
+	xlog_force_shutdown(log, SHUTDOWN_LOG_IO_ERROR);
+sync:
+	xlog_state_done_syncing(iclog);
+	up(&iclog->ic_sema);
 }
 
 /*
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 13b94d2e60..a1e18b2497 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -2511,7 +2511,7 @@ xlog_abort_defer_ops(
 
 	list_for_each_entry_safe(dfc, next, capture_list, dfc_list) {
 		list_del_init(&dfc->dfc_list);
-		xfs_defer_ops_capture_free(mp, dfc);
+		xfs_defer_ops_capture_abort(mp, dfc);
 	}
 }
 
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 0a0fd19573..aed5be5508 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -1021,7 +1021,7 @@ xfs_mountfs(
  out_log_dealloc:
 	xfs_log_mount_cancel(mp);
  out_inodegc_shrinker:
-	unregister_shrinker(&mp->m_inodegc_shrinker);
+	shrinker_free(mp->m_inodegc_shrinker);
  out_fail_wait:
 	if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp)
 		xfs_buftarg_drain(mp->m_logdev_targp);
@@ -1104,7 +1104,7 @@ xfs_unmountfs(
 #if defined(DEBUG)
 	xfs_errortag_clearall(mp);
 #endif
-	unregister_shrinker(&mp->m_inodegc_shrinker);
+	shrinker_free(mp->m_inodegc_shrinker);
 	xfs_free_perag(mp);
 
 	xfs_errortag_del(mp);
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index d19cca099b..503fe3c7ed 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -101,9 +101,9 @@ typedef struct xfs_mount {
 
 	/*
 	 * Optional cache of rt summary level per bitmap block with the
-	 * invariant that m_rsum_cache[bbno] <= the minimum i for which
-	 * rsum[i][bbno] != 0. Reads and writes are serialized by the rsumip
-	 * inode lock.
+	 * invariant that m_rsum_cache[bbno] > the maximum i for which
+	 * rsum[i][bbno] != 0, or 0 if rsum[i][bbno] == 0 for all i.
+	 * Reads and writes are serialized by the rsumip inode lock.
 	 */
 	uint8_t			*m_rsum_cache;
 	struct xfs_mru_cache	*m_filestream;  /* per-mount filestream data */
@@ -119,6 +119,7 @@ typedef struct xfs_mount {
 	uint8_t			m_blkbb_log;	/* blocklog - BBSHIFT */
 	uint8_t			m_agno_log;	/* log #ag's */
 	uint8_t			m_sectbb_log;	/* sectlog - BBSHIFT */
+	int8_t			m_rtxblklog;	/* log2 of rextsize, if possible */
 	uint			m_blockmask;	/* sb_blocksize-1 */
 	uint			m_blockwsize;	/* sb_blocksize in words */
 	uint			m_blockwmask;	/* blockwsize-1 */
@@ -152,6 +153,7 @@ typedef struct xfs_mount {
 	uint64_t		m_features;	/* active filesystem features */
 	uint64_t		m_low_space[XFS_LOWSP_MAX];
 	uint64_t		m_low_rtexts[XFS_LOWSP_MAX];
+	uint64_t		m_rtxblkmask;	/* rt extent block mask */
 	struct xfs_ino_geometry	m_ino_geo;	/* inode geometry */
 	struct xfs_trans_resv	m_resv;		/* precomputed res values */
 						/* low free space thresholds */
@@ -219,7 +221,7 @@ typedef struct xfs_mount {
 	atomic_t		m_agirotor;	/* last ag dir inode alloced */
 
 	/* Memory shrinker to throttle and reprioritize inodegc */
-	struct shrinker		m_inodegc_shrinker;
+	struct shrinker		*m_inodegc_shrinker;
 	/*
 	 * Workqueue item so that we can coalesce multiple inode flush attempts
 	 * into a single flush.
diff --git a/fs/xfs/xfs_ondisk.h b/fs/xfs/xfs_ondisk.h
index c4cc99b70d..21a7e350b4 100644
--- a/fs/xfs/xfs_ondisk.h
+++ b/fs/xfs/xfs_ondisk.h
@@ -72,6 +72,10 @@ xfs_check_ondisk_structs(void)
 	XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_map_t,		4);
 	XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_local_t,	4);
 
+	/* realtime structures */
+	XFS_CHECK_STRUCT_SIZE(union xfs_rtword_raw,		4);
+	XFS_CHECK_STRUCT_SIZE(union xfs_suminfo_raw,		4);
+
 	/*
 	 * m68k has problems with xfs_attr_leaf_name_remote_t, but we pad it to
 	 * 4 bytes anyway so it's not obviously a problem.  Hence for the moment
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index 086e78a614..94a7932ac5 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -504,8 +504,7 @@ xfs_qm_shrink_scan(
 	struct shrinker		*shrink,
 	struct shrink_control	*sc)
 {
-	struct xfs_quotainfo	*qi = container_of(shrink,
-					struct xfs_quotainfo, qi_shrinker);
+	struct xfs_quotainfo	*qi = shrink->private_data;
 	struct xfs_qm_isolate	isol;
 	unsigned long		freed;
 	int			error;
@@ -539,8 +538,7 @@ xfs_qm_shrink_count(
 	struct shrinker		*shrink,
 	struct shrink_control	*sc)
 {
-	struct xfs_quotainfo	*qi = container_of(shrink,
-					struct xfs_quotainfo, qi_shrinker);
+	struct xfs_quotainfo	*qi = shrink->private_data;
 
 	return list_lru_shrink_count(&qi->qi_lru, sc);
 }
@@ -680,15 +678,18 @@ xfs_qm_init_quotainfo(
 	if (XFS_IS_PQUOTA_ON(mp))
 		xfs_qm_set_defquota(mp, XFS_DQTYPE_PROJ, qinf);
 
-	qinf->qi_shrinker.count_objects = xfs_qm_shrink_count;
-	qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan;
-	qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
-	qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE;
-
-	error = register_shrinker(&qinf->qi_shrinker, "xfs-qm:%s",
-				  mp->m_super->s_id);
-	if (error)
+	qinf->qi_shrinker = shrinker_alloc(SHRINKER_NUMA_AWARE, "xfs-qm:%s",
+					   mp->m_super->s_id);
+	if (!qinf->qi_shrinker) {
+		error = -ENOMEM;
 		goto out_free_inos;
+	}
+
+	qinf->qi_shrinker->count_objects = xfs_qm_shrink_count;
+	qinf->qi_shrinker->scan_objects = xfs_qm_shrink_scan;
+	qinf->qi_shrinker->private_data = qinf;
+
+	shrinker_register(qinf->qi_shrinker);
 
 	return 0;
 
@@ -718,7 +719,7 @@ xfs_qm_destroy_quotainfo(
 	qi = mp->m_quotainfo;
 	ASSERT(qi != NULL);
 
-	unregister_shrinker(&qi->qi_shrinker);
+	shrinker_free(qi->qi_shrinker);
 	list_lru_destroy(&qi->qi_lru);
 	xfs_qm_destroy_quotainos(qi);
 	mutex_destroy(&qi->qi_tree_lock);
diff --git a/fs/xfs/xfs_qm.h b/fs/xfs/xfs_qm.h
index 9683f0457d..d5c9fc4ba5 100644
--- a/fs/xfs/xfs_qm.h
+++ b/fs/xfs/xfs_qm.h
@@ -63,7 +63,7 @@ struct xfs_quotainfo {
 	struct xfs_def_quota	qi_usr_default;
 	struct xfs_def_quota	qi_grp_default;
 	struct xfs_def_quota	qi_prj_default;
-	struct shrinker		qi_shrinker;
+	struct shrinker		*qi_shrinker;
 
 	/* Minimum and maximum quota expiration timestamp values. */
 	time64_t		qi_expiry_min;
diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c
index eb9102453a..e5b62dc284 100644
--- a/fs/xfs/xfs_reflink.c
+++ b/fs/xfs/xfs_reflink.c
@@ -784,6 +784,7 @@ xfs_reflink_end_cow_extent(
 		}
 	}
 	del = got;
+	xfs_trim_extent(&del, *offset_fsb, end_fsb - *offset_fsb);
 
 	/* Grab the corresponding mapping in the data fork. */
 	nmaps = 1;
@@ -1540,6 +1541,10 @@ xfs_reflink_remap_prep(
 	if (ret)
 		goto out_unlock;
 
+	xfs_iflags_set(src, XFS_IREMAPPING);
+	if (inode_in != inode_out)
+		xfs_ilock_demote(src, XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL);
+
 	return 0;
 out_unlock:
 	xfs_iunlock2_io_mmap(src, dest);
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index 16534e9873..88c48de5c9 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -19,6 +19,7 @@
 #include "xfs_icache.h"
 #include "xfs_rtalloc.h"
 #include "xfs_sb.h"
+#include "xfs_rtbitmap.h"
 
 /*
  * Read and return the summary information for a given extent size,
@@ -28,48 +29,48 @@
  */
 static int
 xfs_rtget_summary(
-	xfs_mount_t	*mp,		/* file system mount structure */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	int		log,		/* log2 of extent size */
-	xfs_rtblock_t	bbno,		/* bitmap block number */
-	struct xfs_buf	**rbpp,		/* in/out: summary block buffer */
-	xfs_fsblock_t	*rsb,		/* in/out: summary block number */
-	xfs_suminfo_t	*sum)		/* out: summary info for this block */
+	struct xfs_rtalloc_args	*args,
+	int			log,	/* log2 of extent size */
+	xfs_fileoff_t		bbno,	/* bitmap block number */
+	xfs_suminfo_t		*sum)	/* out: summary info for this block */
 {
-	return xfs_rtmodify_summary_int(mp, tp, log, bbno, 0, rbpp, rsb, sum);
+	return xfs_rtmodify_summary_int(args, log, bbno, 0, sum);
 }
 
 /*
  * Return whether there are any free extents in the size range given
  * by low and high, for the bitmap block bbno.
  */
-STATIC int				/* error */
+STATIC int
 xfs_rtany_summary(
-	xfs_mount_t	*mp,		/* file system mount structure */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	int		low,		/* low log2 extent size */
-	int		high,		/* high log2 extent size */
-	xfs_rtblock_t	bbno,		/* bitmap block number */
-	struct xfs_buf	**rbpp,		/* in/out: summary block buffer */
-	xfs_fsblock_t	*rsb,		/* in/out: summary block number */
-	int		*stat)		/* out: any good extents here? */
+	struct xfs_rtalloc_args	*args,
+	int			low,	/* low log2 extent size */
+	int			high,	/* high log2 extent size */
+	xfs_fileoff_t		bbno,	/* bitmap block number */
+	int			*maxlog) /* out: max log2 extent size free */
 {
-	int		error;		/* error value */
-	int		log;		/* loop counter, log2 of ext. size */
-	xfs_suminfo_t	sum;		/* summary data */
-
-	/* There are no extents at levels < m_rsum_cache[bbno]. */
-	if (mp->m_rsum_cache && low < mp->m_rsum_cache[bbno])
-		low = mp->m_rsum_cache[bbno];
+	struct xfs_mount	*mp = args->mp;
+	int			error;
+	int			log;	/* loop counter, log2 of ext. size */
+	xfs_suminfo_t		sum;	/* summary data */
+
+	/* There are no extents at levels >= m_rsum_cache[bbno]. */
+	if (mp->m_rsum_cache) {
+		high = min(high, mp->m_rsum_cache[bbno] - 1);
+		if (low > high) {
+			*maxlog = -1;
+			return 0;
+		}
+	}
 
 	/*
 	 * Loop over logs of extent sizes.
 	 */
-	for (log = low; log <= high; log++) {
+	for (log = high; log >= low; log--) {
 		/*
 		 * Get one summary datum.
 		 */
-		error = xfs_rtget_summary(mp, tp, log, bbno, rbpp, rsb, &sum);
+		error = xfs_rtget_summary(args, log, bbno, &sum);
 		if (error) {
 			return error;
 		}
@@ -77,18 +78,18 @@ xfs_rtany_summary(
 		 * If there are any, return success.
 		 */
 		if (sum) {
-			*stat = 1;
+			*maxlog = log;
 			goto out;
 		}
 	}
 	/*
 	 * Found nothing, return failure.
 	 */
-	*stat = 0;
+	*maxlog = -1;
 out:
-	/* There were no extents at levels < log. */
-	if (mp->m_rsum_cache && log > mp->m_rsum_cache[bbno])
-		mp->m_rsum_cache[bbno] = log;
+	/* There were no extents at levels > log. */
+	if (mp->m_rsum_cache && log + 1 < mp->m_rsum_cache[bbno])
+		mp->m_rsum_cache[bbno] = log + 1;
 	return 0;
 }
 
@@ -97,60 +98,54 @@ out:
  * Copy and transform the summary file, given the old and new
  * parameters in the mount structures.
  */
-STATIC int				/* error */
+STATIC int
 xfs_rtcopy_summary(
-	xfs_mount_t	*omp,		/* old file system mount point */
-	xfs_mount_t	*nmp,		/* new file system mount point */
-	xfs_trans_t	*tp)		/* transaction pointer */
+	struct xfs_rtalloc_args	*oargs,
+	struct xfs_rtalloc_args	*nargs)
 {
-	xfs_rtblock_t	bbno;		/* bitmap block number */
-	struct xfs_buf	*bp;		/* summary buffer */
-	int		error;		/* error return value */
-	int		log;		/* summary level number (log length) */
-	xfs_suminfo_t	sum;		/* summary data */
-	xfs_fsblock_t	sumbno;		/* summary block number */
+	xfs_fileoff_t		bbno;	/* bitmap block number */
+	int			error;
+	int			log;	/* summary level number (log length) */
+	xfs_suminfo_t		sum;	/* summary data */
 
-	bp = NULL;
-	for (log = omp->m_rsumlevels - 1; log >= 0; log--) {
-		for (bbno = omp->m_sb.sb_rbmblocks - 1;
+	for (log = oargs->mp->m_rsumlevels - 1; log >= 0; log--) {
+		for (bbno = oargs->mp->m_sb.sb_rbmblocks - 1;
 		     (xfs_srtblock_t)bbno >= 0;
 		     bbno--) {
-			error = xfs_rtget_summary(omp, tp, log, bbno, &bp,
-				&sumbno, &sum);
+			error = xfs_rtget_summary(oargs, log, bbno, &sum);
 			if (error)
-				return error;
+				goto out;
 			if (sum == 0)
 				continue;
-			error = xfs_rtmodify_summary(omp, tp, log, bbno, -sum,
-				&bp, &sumbno);
+			error = xfs_rtmodify_summary(oargs, log, bbno, -sum);
 			if (error)
-				return error;
-			error = xfs_rtmodify_summary(nmp, tp, log, bbno, sum,
-				&bp, &sumbno);
+				goto out;
+			error = xfs_rtmodify_summary(nargs, log, bbno, sum);
 			if (error)
-				return error;
+				goto out;
 			ASSERT(sum > 0);
 		}
 	}
+	error = 0;
+out:
+	xfs_rtbuf_cache_relse(oargs);
 	return 0;
 }
 /*
  * Mark an extent specified by start and len allocated.
  * Updates all the summary information as well as the bitmap.
  */
-STATIC int				/* error */
+STATIC int
 xfs_rtallocate_range(
-	xfs_mount_t	*mp,		/* file system mount point */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_rtblock_t	start,		/* start block to allocate */
-	xfs_extlen_t	len,		/* length to allocate */
-	struct xfs_buf	**rbpp,		/* in/out: summary block buffer */
-	xfs_fsblock_t	*rsb)		/* in/out: summary block number */
+	struct xfs_rtalloc_args	*args,
+	xfs_rtxnum_t		start,	/* start rtext to allocate */
+	xfs_rtxlen_t		len)	/* in/out: summary block number */
 {
-	xfs_rtblock_t	end;		/* end of the allocated extent */
-	int		error;		/* error value */
-	xfs_rtblock_t	postblock = 0;	/* first block allocated > end */
-	xfs_rtblock_t	preblock = 0;	/* first block allocated < start */
+	struct xfs_mount	*mp = args->mp;
+	xfs_rtxnum_t		end;	/* end of the allocated rtext */
+	int			error;
+	xfs_rtxnum_t		postblock = 0; /* first rtext allocated > end */
+	xfs_rtxnum_t		preblock = 0; /* first rtext allocated < start */
 
 	end = start + len - 1;
 	/*
@@ -158,15 +153,15 @@ xfs_rtallocate_range(
 	 * We need to find the beginning and end of the extent so we can
 	 * properly update the summary.
 	 */
-	error = xfs_rtfind_back(mp, tp, start, 0, &preblock);
+	error = xfs_rtfind_back(args, start, 0, &preblock);
 	if (error) {
 		return error;
 	}
 	/*
 	 * Find the next allocated block (end of free extent).
 	 */
-	error = xfs_rtfind_forw(mp, tp, end, mp->m_sb.sb_rextents - 1,
-		&postblock);
+	error = xfs_rtfind_forw(args, end, mp->m_sb.sb_rextents - 1,
+			&postblock);
 	if (error) {
 		return error;
 	}
@@ -174,9 +169,9 @@ xfs_rtallocate_range(
 	 * Decrement the summary information corresponding to the entire
 	 * (old) free extent.
 	 */
-	error = xfs_rtmodify_summary(mp, tp,
-		XFS_RTBLOCKLOG(postblock + 1 - preblock),
-		XFS_BITTOBLOCK(mp, preblock), -1, rbpp, rsb);
+	error = xfs_rtmodify_summary(args,
+			XFS_RTBLOCKLOG(postblock + 1 - preblock),
+			xfs_rtx_to_rbmblock(mp, preblock), -1);
 	if (error) {
 		return error;
 	}
@@ -185,9 +180,9 @@ xfs_rtallocate_range(
 	 * old extent, add summary data for them to be free.
 	 */
 	if (preblock < start) {
-		error = xfs_rtmodify_summary(mp, tp,
-			XFS_RTBLOCKLOG(start - preblock),
-			XFS_BITTOBLOCK(mp, preblock), 1, rbpp, rsb);
+		error = xfs_rtmodify_summary(args,
+				XFS_RTBLOCKLOG(start - preblock),
+				xfs_rtx_to_rbmblock(mp, preblock), 1);
 		if (error) {
 			return error;
 		}
@@ -197,9 +192,9 @@ xfs_rtallocate_range(
 	 * old extent, add summary data for them to be free.
 	 */
 	if (postblock > end) {
-		error = xfs_rtmodify_summary(mp, tp,
-			XFS_RTBLOCKLOG(postblock - end),
-			XFS_BITTOBLOCK(mp, end + 1), 1, rbpp, rsb);
+		error = xfs_rtmodify_summary(args,
+				XFS_RTBLOCKLOG(postblock - end),
+				xfs_rtx_to_rbmblock(mp, end + 1), 1);
 		if (error) {
 			return error;
 		}
@@ -207,54 +202,69 @@ xfs_rtallocate_range(
 	/*
 	 * Modify the bitmap to mark this extent allocated.
 	 */
-	error = xfs_rtmodify_range(mp, tp, start, len, 0);
+	error = xfs_rtmodify_range(args, start, len, 0);
 	return error;
 }
 
 /*
+ * Make sure we don't run off the end of the rt volume.  Be careful that
+ * adjusting maxlen downwards doesn't cause us to fail the alignment checks.
+ */
+static inline xfs_rtxlen_t
+xfs_rtallocate_clamp_len(
+	struct xfs_mount	*mp,
+	xfs_rtxnum_t		startrtx,
+	xfs_rtxlen_t		rtxlen,
+	xfs_rtxlen_t		prod)
+{
+	xfs_rtxlen_t		ret;
+
+	ret = min(mp->m_sb.sb_rextents, startrtx + rtxlen) - startrtx;
+	return rounddown(ret, prod);
+}
+
+/*
  * Attempt to allocate an extent minlen<=len<=maxlen starting from
  * bitmap block bbno.  If we don't get maxlen then use prod to trim
- * the length, if given.  Returns error; returns starting block in *rtblock.
+ * the length, if given.  Returns error; returns starting block in *rtx.
  * The lengths are all in rtextents.
  */
-STATIC int				/* error */
+STATIC int
 xfs_rtallocate_extent_block(
-	xfs_mount_t	*mp,		/* file system mount point */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_rtblock_t	bbno,		/* bitmap block number */
-	xfs_extlen_t	minlen,		/* minimum length to allocate */
-	xfs_extlen_t	maxlen,		/* maximum length to allocate */
-	xfs_extlen_t	*len,		/* out: actual length allocated */
-	xfs_rtblock_t	*nextp,		/* out: next block to try */
-	struct xfs_buf	**rbpp,		/* in/out: summary block buffer */
-	xfs_fsblock_t	*rsb,		/* in/out: summary block number */
-	xfs_extlen_t	prod,		/* extent product factor */
-	xfs_rtblock_t	*rtblock)	/* out: start block allocated */
+	struct xfs_rtalloc_args	*args,
+	xfs_fileoff_t		bbno,	/* bitmap block number */
+	xfs_rtxlen_t		minlen,	/* minimum length to allocate */
+	xfs_rtxlen_t		maxlen,	/* maximum length to allocate */
+	xfs_rtxlen_t		*len,	/* out: actual length allocated */
+	xfs_rtxnum_t		*nextp,	/* out: next rtext to try */
+	xfs_rtxlen_t		prod,	/* extent product factor */
+	xfs_rtxnum_t		*rtx)	/* out: start rtext allocated */
 {
-	xfs_rtblock_t	besti;		/* best rtblock found so far */
-	xfs_rtblock_t	bestlen;	/* best length found so far */
-	xfs_rtblock_t	end;		/* last rtblock in chunk */
-	int		error;		/* error value */
-	xfs_rtblock_t	i;		/* current rtblock trying */
-	xfs_rtblock_t	next;		/* next rtblock to try */
-	int		stat;		/* status from internal calls */
+	struct xfs_mount	*mp = args->mp;
+	xfs_rtxnum_t		besti;	/* best rtext found so far */
+	xfs_rtxnum_t		bestlen;/* best length found so far */
+	xfs_rtxnum_t		end;	/* last rtext in chunk */
+	int			error;
+	xfs_rtxnum_t		i;	/* current rtext trying */
+	xfs_rtxnum_t		next;	/* next rtext to try */
+	int			stat;	/* status from internal calls */
 
 	/*
 	 * Loop over all the extents starting in this bitmap block,
 	 * looking for one that's long enough.
 	 */
-	for (i = XFS_BLOCKTOBIT(mp, bbno), besti = -1, bestlen = 0,
-		end = XFS_BLOCKTOBIT(mp, bbno + 1) - 1;
+	for (i = xfs_rbmblock_to_rtx(mp, bbno), besti = -1, bestlen = 0,
+		end = xfs_rbmblock_to_rtx(mp, bbno + 1) - 1;
 	     i <= end;
 	     i++) {
 		/* Make sure we don't scan off the end of the rt volume. */
-		maxlen = min(mp->m_sb.sb_rextents, i + maxlen) - i;
+		maxlen = xfs_rtallocate_clamp_len(mp, i, maxlen, prod);
 
 		/*
 		 * See if there's a free extent of maxlen starting at i.
 		 * If it's not so then next will contain the first non-free.
 		 */
-		error = xfs_rtcheck_range(mp, tp, i, maxlen, 1, &next, &stat);
+		error = xfs_rtcheck_range(args, i, maxlen, 1, &next, &stat);
 		if (error) {
 			return error;
 		}
@@ -262,13 +272,12 @@ xfs_rtallocate_extent_block(
 			/*
 			 * i for maxlen is all free, allocate and return that.
 			 */
-			error = xfs_rtallocate_range(mp, tp, i, maxlen, rbpp,
-				rsb);
+			error = xfs_rtallocate_range(args, i, maxlen);
 			if (error) {
 				return error;
 			}
 			*len = maxlen;
-			*rtblock = i;
+			*rtx = i;
 			return 0;
 		}
 		/*
@@ -278,7 +287,7 @@ xfs_rtallocate_extent_block(
 		 * so far, remember it.
 		 */
 		if (minlen < maxlen) {
-			xfs_rtblock_t	thislen;	/* this extent size */
+			xfs_rtxnum_t	thislen;	/* this extent size */
 
 			thislen = next - i;
 			if (thislen >= minlen && thislen > bestlen) {
@@ -290,7 +299,7 @@ xfs_rtallocate_extent_block(
 		 * If not done yet, find the start of the next free space.
 		 */
 		if (next < end) {
-			error = xfs_rtfind_forw(mp, tp, next, end, &i);
+			error = xfs_rtfind_forw(args, next, end, &i);
 			if (error) {
 				return error;
 			}
@@ -301,7 +310,7 @@ xfs_rtallocate_extent_block(
 	 * Searched the whole thing & didn't find a maxlen free extent.
 	 */
 	if (minlen < maxlen && besti != -1) {
-		xfs_extlen_t	p;	/* amount to trim length by */
+		xfs_rtxlen_t	p;	/* amount to trim length by */
 
 		/*
 		 * If size should be a multiple of prod, make that so.
@@ -315,51 +324,49 @@ xfs_rtallocate_extent_block(
 		/*
 		 * Allocate besti for bestlen & return that.
 		 */
-		error = xfs_rtallocate_range(mp, tp, besti, bestlen, rbpp, rsb);
+		error = xfs_rtallocate_range(args, besti, bestlen);
 		if (error) {
 			return error;
 		}
 		*len = bestlen;
-		*rtblock = besti;
+		*rtx = besti;
 		return 0;
 	}
 	/*
 	 * Allocation failed.  Set *nextp to the next block to try.
 	 */
 	*nextp = next;
-	*rtblock = NULLRTBLOCK;
+	*rtx = NULLRTEXTNO;
 	return 0;
 }
 
 /*
  * Allocate an extent of length minlen<=len<=maxlen, starting at block
  * bno.  If we don't get maxlen then use prod to trim the length, if given.
- * Returns error; returns starting block in *rtblock.
+ * Returns error; returns starting block in *rtx.
  * The lengths are all in rtextents.
  */
-STATIC int				/* error */
+STATIC int
 xfs_rtallocate_extent_exact(
-	xfs_mount_t	*mp,		/* file system mount point */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_rtblock_t	bno,		/* starting block number to allocate */
-	xfs_extlen_t	minlen,		/* minimum length to allocate */
-	xfs_extlen_t	maxlen,		/* maximum length to allocate */
-	xfs_extlen_t	*len,		/* out: actual length allocated */
-	struct xfs_buf	**rbpp,		/* in/out: summary block buffer */
-	xfs_fsblock_t	*rsb,		/* in/out: summary block number */
-	xfs_extlen_t	prod,		/* extent product factor */
-	xfs_rtblock_t	*rtblock)	/* out: start block allocated */
+	struct xfs_rtalloc_args	*args,
+	xfs_rtxnum_t		start,	/* starting rtext number to allocate */
+	xfs_rtxlen_t		minlen,	/* minimum length to allocate */
+	xfs_rtxlen_t		maxlen,	/* maximum length to allocate */
+	xfs_rtxlen_t		*len,	/* out: actual length allocated */
+	xfs_rtxlen_t		prod,	/* extent product factor */
+	xfs_rtxnum_t		*rtx)	/* out: start rtext allocated */
 {
-	int		error;		/* error value */
-	xfs_extlen_t	i;		/* extent length trimmed due to prod */
-	int		isfree;		/* extent is free */
-	xfs_rtblock_t	next;		/* next block to try (dummy) */
+	int			error;
+	xfs_rtxlen_t		i;	/* extent length trimmed due to prod */
+	int			isfree;	/* extent is free */
+	xfs_rtxnum_t		next;	/* next rtext to try (dummy) */
 
-	ASSERT(minlen % prod == 0 && maxlen % prod == 0);
+	ASSERT(minlen % prod == 0);
+	ASSERT(maxlen % prod == 0);
 	/*
 	 * Check if the range in question (for maxlen) is free.
 	 */
-	error = xfs_rtcheck_range(mp, tp, bno, maxlen, 1, &next, &isfree);
+	error = xfs_rtcheck_range(args, start, maxlen, 1, &next, &isfree);
 	if (error) {
 		return error;
 	}
@@ -367,23 +374,23 @@ xfs_rtallocate_extent_exact(
 		/*
 		 * If it is, allocate it and return success.
 		 */
-		error = xfs_rtallocate_range(mp, tp, bno, maxlen, rbpp, rsb);
+		error = xfs_rtallocate_range(args, start, maxlen);
 		if (error) {
 			return error;
 		}
 		*len = maxlen;
-		*rtblock = bno;
+		*rtx = start;
 		return 0;
 	}
 	/*
 	 * If not, allocate what there is, if it's at least minlen.
 	 */
-	maxlen = next - bno;
+	maxlen = next - start;
 	if (maxlen < minlen) {
 		/*
 		 * Failed, return failure status.
 		 */
-		*rtblock = NULLRTBLOCK;
+		*rtx = NULLRTEXTNO;
 		return 0;
 	}
 	/*
@@ -395,81 +402,82 @@ xfs_rtallocate_extent_exact(
 			/*
 			 * Now we can't do it, return failure status.
 			 */
-			*rtblock = NULLRTBLOCK;
+			*rtx = NULLRTEXTNO;
 			return 0;
 		}
 	}
 	/*
 	 * Allocate what we can and return it.
 	 */
-	error = xfs_rtallocate_range(mp, tp, bno, maxlen, rbpp, rsb);
+	error = xfs_rtallocate_range(args, start, maxlen);
 	if (error) {
 		return error;
 	}
 	*len = maxlen;
-	*rtblock = bno;
+	*rtx = start;
 	return 0;
 }
 
 /*
  * Allocate an extent of length minlen<=len<=maxlen, starting as near
- * to bno as possible.  If we don't get maxlen then use prod to trim
+ * to start as possible.  If we don't get maxlen then use prod to trim
  * the length, if given.  The lengths are all in rtextents.
  */
-STATIC int				/* error */
+STATIC int
 xfs_rtallocate_extent_near(
-	xfs_mount_t	*mp,		/* file system mount point */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_rtblock_t	bno,		/* starting block number to allocate */
-	xfs_extlen_t	minlen,		/* minimum length to allocate */
-	xfs_extlen_t	maxlen,		/* maximum length to allocate */
-	xfs_extlen_t	*len,		/* out: actual length allocated */
-	struct xfs_buf	**rbpp,		/* in/out: summary block buffer */
-	xfs_fsblock_t	*rsb,		/* in/out: summary block number */
-	xfs_extlen_t	prod,		/* extent product factor */
-	xfs_rtblock_t	*rtblock)	/* out: start block allocated */
+	struct xfs_rtalloc_args	*args,
+	xfs_rtxnum_t		start,	/* starting rtext number to allocate */
+	xfs_rtxlen_t		minlen,	/* minimum length to allocate */
+	xfs_rtxlen_t		maxlen,	/* maximum length to allocate */
+	xfs_rtxlen_t		*len,	/* out: actual length allocated */
+	xfs_rtxlen_t		prod,	/* extent product factor */
+	xfs_rtxnum_t		*rtx)	/* out: start rtext allocated */
 {
-	int		any;		/* any useful extents from summary */
-	xfs_rtblock_t	bbno;		/* bitmap block number */
-	int		error;		/* error value */
-	int		i;		/* bitmap block offset (loop control) */
-	int		j;		/* secondary loop control */
-	int		log2len;	/* log2 of minlen */
-	xfs_rtblock_t	n;		/* next block to try */
-	xfs_rtblock_t	r;		/* result block */
-
-	ASSERT(minlen % prod == 0 && maxlen % prod == 0);
+	struct xfs_mount	*mp = args->mp;
+	int			maxlog;	/* max useful extent from summary */
+	xfs_fileoff_t		bbno;	/* bitmap block number */
+	int			error;
+	int			i;	/* bitmap block offset (loop control) */
+	int			j;	/* secondary loop control */
+	int			log2len; /* log2 of minlen */
+	xfs_rtxnum_t		n;	/* next rtext to try */
+	xfs_rtxnum_t		r;	/* result rtext */
+
+	ASSERT(minlen % prod == 0);
+	ASSERT(maxlen % prod == 0);
+
 	/*
 	 * If the block number given is off the end, silently set it to
 	 * the last block.
 	 */
-	if (bno >= mp->m_sb.sb_rextents)
-		bno = mp->m_sb.sb_rextents - 1;
+	if (start >= mp->m_sb.sb_rextents)
+		start = mp->m_sb.sb_rextents - 1;
 
 	/* Make sure we don't run off the end of the rt volume. */
-	maxlen = min(mp->m_sb.sb_rextents, bno + maxlen) - bno;
+	maxlen = xfs_rtallocate_clamp_len(mp, start, maxlen, prod);
 	if (maxlen < minlen) {
-		*rtblock = NULLRTBLOCK;
+		*rtx = NULLRTEXTNO;
 		return 0;
 	}
 
 	/*
 	 * Try the exact allocation first.
 	 */
-	error = xfs_rtallocate_extent_exact(mp, tp, bno, minlen, maxlen, len,
-		rbpp, rsb, prod, &r);
+	error = xfs_rtallocate_extent_exact(args, start, minlen, maxlen, len,
+			prod, &r);
 	if (error) {
 		return error;
 	}
 	/*
 	 * If the exact allocation worked, return that.
 	 */
-	if (r != NULLRTBLOCK) {
-		*rtblock = r;
+	if (r != NULLRTEXTNO) {
+		*rtx = r;
 		return 0;
 	}
-	bbno = XFS_BITTOBLOCK(mp, bno);
+	bbno = xfs_rtx_to_rbmblock(mp, start);
 	i = 0;
+	j = -1;
 	ASSERT(minlen != 0);
 	log2len = xfs_highbit32(minlen);
 	/*
@@ -480,8 +488,8 @@ xfs_rtallocate_extent_near(
 		 * Get summary information of extents of all useful levels
 		 * starting in this bitmap block.
 		 */
-		error = xfs_rtany_summary(mp, tp, log2len, mp->m_rsumlevels - 1,
-			bbno + i, rbpp, rsb, &any);
+		error = xfs_rtany_summary(args, log2len, mp->m_rsumlevels - 1,
+				bbno + i, &maxlog);
 		if (error) {
 			return error;
 		}
@@ -489,7 +497,10 @@ xfs_rtallocate_extent_near(
 		 * If there are any useful extents starting here, try
 		 * allocating one.
 		 */
-		if (any) {
+		if (maxlog >= 0) {
+			xfs_extlen_t maxavail =
+				min_t(xfs_rtblock_t, maxlen,
+				      (1ULL << (maxlog + 1)) - 1);
 			/*
 			 * On the positive side of the starting location.
 			 */
@@ -498,17 +509,17 @@ xfs_rtallocate_extent_near(
 				 * Try to allocate an extent starting in
 				 * this block.
 				 */
-				error = xfs_rtallocate_extent_block(mp, tp,
-					bbno + i, minlen, maxlen, len, &n, rbpp,
-					rsb, prod, &r);
+				error = xfs_rtallocate_extent_block(args,
+						bbno + i, minlen, maxavail, len,
+						&n, prod, &r);
 				if (error) {
 					return error;
 				}
 				/*
 				 * If it worked, return it.
 				 */
-				if (r != NULLRTBLOCK) {
-					*rtblock = r;
+				if (r != NULLRTEXTNO) {
+					*rtx = r;
 					return 0;
 				}
 			}
@@ -516,68 +527,46 @@ xfs_rtallocate_extent_near(
 			 * On the negative side of the starting location.
 			 */
 			else {		/* i < 0 */
+				int	maxblocks;
+
 				/*
-				 * Loop backwards through the bitmap blocks from
-				 * the starting point-1 up to where we are now.
-				 * There should be an extent which ends in this
-				 * bitmap block and is long enough.
+				 * Loop backwards to find the end of the extent
+				 * we found in the realtime summary.
+				 *
+				 * maxblocks is the maximum possible number of
+				 * bitmap blocks from the start of the extent
+				 * to the end of the extent.
 				 */
-				for (j = -1; j > i; j--) {
-					/*
-					 * Grab the summary information for
-					 * this bitmap block.
-					 */
-					error = xfs_rtany_summary(mp, tp,
-						log2len, mp->m_rsumlevels - 1,
-						bbno + j, rbpp, rsb, &any);
-					if (error) {
-						return error;
-					}
-					/*
-					 * If there's no extent given in the
-					 * summary that means the extent we
-					 * found must carry over from an
-					 * earlier block.  If there is an
-					 * extent given, we've already tried
-					 * that allocation, don't do it again.
-					 */
-					if (any)
-						continue;
-					error = xfs_rtallocate_extent_block(mp,
-						tp, bbno + j, minlen, maxlen,
-						len, &n, rbpp, rsb, prod, &r);
+				if (maxlog == 0)
+					maxblocks = 0;
+				else if (maxlog < mp->m_blkbit_log)
+					maxblocks = 1;
+				else
+					maxblocks = 2 << (maxlog - mp->m_blkbit_log);
+
+				/*
+				 * We need to check bbno + i + maxblocks down to
+				 * bbno + i. We already checked bbno down to
+				 * bbno + j + 1, so we don't need to check those
+				 * again.
+				 */
+				j = min(i + maxblocks, j);
+				for (; j >= i; j--) {
+					error = xfs_rtallocate_extent_block(args,
+							bbno + j, minlen,
+							maxavail, len, &n, prod,
+							&r);
 					if (error) {
 						return error;
 					}
 					/*
 					 * If it works, return the extent.
 					 */
-					if (r != NULLRTBLOCK) {
-						*rtblock = r;
+					if (r != NULLRTEXTNO) {
+						*rtx = r;
 						return 0;
 					}
 				}
-				/*
-				 * There weren't intervening bitmap blocks
-				 * with a long enough extent, or the
-				 * allocation didn't work for some reason
-				 * (i.e. it's a little * too short).
-				 * Try to allocate from the summary block
-				 * that we found.
-				 */
-				error = xfs_rtallocate_extent_block(mp, tp,
-					bbno + i, minlen, maxlen, len, &n, rbpp,
-					rsb, prod, &r);
-				if (error) {
-					return error;
-				}
-				/*
-				 * If it works, return the extent.
-				 */
-				if (r != NULLRTBLOCK) {
-					*rtblock = r;
-					return 0;
-				}
 			}
 		}
 		/*
@@ -610,7 +599,7 @@ xfs_rtallocate_extent_near(
 		else
 			break;
 	}
-	*rtblock = NULLRTBLOCK;
+	*rtx = NULLRTEXTNO;
 	return 0;
 }
 
@@ -619,26 +608,25 @@ xfs_rtallocate_extent_near(
  * specified.  If we don't get maxlen then use prod to trim
  * the length, if given.  The lengths are all in rtextents.
  */
-STATIC int				/* error */
+STATIC int
 xfs_rtallocate_extent_size(
-	xfs_mount_t	*mp,		/* file system mount point */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_extlen_t	minlen,		/* minimum length to allocate */
-	xfs_extlen_t	maxlen,		/* maximum length to allocate */
-	xfs_extlen_t	*len,		/* out: actual length allocated */
-	struct xfs_buf	**rbpp,		/* in/out: summary block buffer */
-	xfs_fsblock_t	*rsb,		/* in/out: summary block number */
-	xfs_extlen_t	prod,		/* extent product factor */
-	xfs_rtblock_t	*rtblock)	/* out: start block allocated */
+	struct xfs_rtalloc_args	*args,
+	xfs_rtxlen_t		minlen,	/* minimum length to allocate */
+	xfs_rtxlen_t		maxlen,	/* maximum length to allocate */
+	xfs_rtxlen_t		*len,	/* out: actual length allocated */
+	xfs_rtxlen_t		prod,	/* extent product factor */
+	xfs_rtxnum_t		*rtx)	/* out: start rtext allocated */
 {
-	int		error;		/* error value */
-	int		i;		/* bitmap block number */
-	int		l;		/* level number (loop control) */
-	xfs_rtblock_t	n;		/* next block to be tried */
-	xfs_rtblock_t	r;		/* result block number */
-	xfs_suminfo_t	sum;		/* summary information for extents */
-
-	ASSERT(minlen % prod == 0 && maxlen % prod == 0);
+	struct xfs_mount	*mp = args->mp;
+	int			error;
+	xfs_fileoff_t		i;	/* bitmap block number */
+	int			l;	/* level number (loop control) */
+	xfs_rtxnum_t		n;	/* next rtext to be tried */
+	xfs_rtxnum_t		r;	/* result rtext number */
+	xfs_suminfo_t		sum;	/* summary information for extents */
+
+	ASSERT(minlen % prod == 0);
+	ASSERT(maxlen % prod == 0);
 	ASSERT(maxlen != 0);
 
 	/*
@@ -656,8 +644,7 @@ xfs_rtallocate_extent_size(
 			/*
 			 * Get the summary for this level/block.
 			 */
-			error = xfs_rtget_summary(mp, tp, l, i, rbpp, rsb,
-				&sum);
+			error = xfs_rtget_summary(args, l, i, &sum);
 			if (error) {
 				return error;
 			}
@@ -669,16 +656,16 @@ xfs_rtallocate_extent_size(
 			/*
 			 * Try allocating the extent.
 			 */
-			error = xfs_rtallocate_extent_block(mp, tp, i, maxlen,
-				maxlen, len, &n, rbpp, rsb, prod, &r);
+			error = xfs_rtallocate_extent_block(args, i, maxlen,
+					maxlen, len, &n, prod, &r);
 			if (error) {
 				return error;
 			}
 			/*
 			 * If it worked, return that.
 			 */
-			if (r != NULLRTBLOCK) {
-				*rtblock = r;
+			if (r != NULLRTEXTNO) {
+				*rtx = r;
 				return 0;
 			}
 			/*
@@ -686,8 +673,8 @@ xfs_rtallocate_extent_size(
 			 * allocator is beyond the next bitmap block,
 			 * skip to that bitmap block.
 			 */
-			if (XFS_BITTOBLOCK(mp, n) > i + 1)
-				i = XFS_BITTOBLOCK(mp, n) - 1;
+			if (xfs_rtx_to_rbmblock(mp, n) > i + 1)
+				i = xfs_rtx_to_rbmblock(mp, n) - 1;
 		}
 	}
 	/*
@@ -695,7 +682,7 @@ xfs_rtallocate_extent_size(
 	 * we're asking for a fixed size extent.
 	 */
 	if (minlen > --maxlen) {
-		*rtblock = NULLRTBLOCK;
+		*rtx = NULLRTEXTNO;
 		return 0;
 	}
 	ASSERT(minlen != 0);
@@ -715,8 +702,7 @@ xfs_rtallocate_extent_size(
 			/*
 			 * Get the summary information for this level/block.
 			 */
-			error =	xfs_rtget_summary(mp, tp, l, i, rbpp, rsb,
-						  &sum);
+			error =	xfs_rtget_summary(args, l, i, &sum);
 			if (error) {
 				return error;
 			}
@@ -730,18 +716,18 @@ xfs_rtallocate_extent_size(
 			 * minlen/maxlen are in the possible range for
 			 * this summary level.
 			 */
-			error = xfs_rtallocate_extent_block(mp, tp, i,
+			error = xfs_rtallocate_extent_block(args, i,
 					XFS_RTMAX(minlen, 1 << l),
 					XFS_RTMIN(maxlen, (1 << (l + 1)) - 1),
-					len, &n, rbpp, rsb, prod, &r);
+					len, &n, prod, &r);
 			if (error) {
 				return error;
 			}
 			/*
 			 * If it worked, return that extent.
 			 */
-			if (r != NULLRTBLOCK) {
-				*rtblock = r;
+			if (r != NULLRTEXTNO) {
+				*rtx = r;
 				return 0;
 			}
 			/*
@@ -749,14 +735,14 @@ xfs_rtallocate_extent_size(
 			 * allocator is beyond the next bitmap block,
 			 * skip to that bitmap block.
 			 */
-			if (XFS_BITTOBLOCK(mp, n) > i + 1)
-				i = XFS_BITTOBLOCK(mp, n) - 1;
+			if (xfs_rtx_to_rbmblock(mp, n) > i + 1)
+				i = xfs_rtx_to_rbmblock(mp, n) - 1;
 		}
 	}
 	/*
 	 * Got nothing, return failure.
 	 */
-	*rtblock = NULLRTBLOCK;
+	*rtx = NULLRTEXTNO;
 	return 0;
 }
 
@@ -886,12 +872,14 @@ xfs_alloc_rsum_cache(
 	xfs_extlen_t	rbmblocks)	/* number of rt bitmap blocks */
 {
 	/*
-	 * The rsum cache is initialized to all zeroes, which is trivially a
-	 * lower bound on the minimum level with any free extents. We can
-	 * continue without the cache if it couldn't be allocated.
+	 * The rsum cache is initialized to the maximum value, which is
+	 * trivially an upper bound on the maximum level with any free extents.
+	 * We can continue without the cache if it couldn't be allocated.
 	 */
-	mp->m_rsum_cache = kvzalloc(rbmblocks, GFP_KERNEL);
-	if (!mp->m_rsum_cache)
+	mp->m_rsum_cache = kvmalloc(rbmblocks, GFP_KERNEL);
+	if (mp->m_rsum_cache)
+		memset(mp->m_rsum_cache, -1, rbmblocks);
+	else
 		xfs_warn(mp, "could not allocate realtime summary cache");
 }
 
@@ -907,13 +895,13 @@ xfs_growfs_rt(
 	xfs_mount_t	*mp,		/* mount point for filesystem */
 	xfs_growfs_rt_t	*in)		/* growfs rt input struct */
 {
-	xfs_rtblock_t	bmbno;		/* bitmap block number */
+	xfs_fileoff_t	bmbno;		/* bitmap block number */
 	struct xfs_buf	*bp;		/* temporary buffer */
 	int		error;		/* error return value */
 	xfs_mount_t	*nmp;		/* new (fake) mount structure */
 	xfs_rfsblock_t	nrblocks;	/* new number of realtime blocks */
 	xfs_extlen_t	nrbmblocks;	/* new number of rt bitmap blocks */
-	xfs_rtblock_t	nrextents;	/* new number of realtime extents */
+	xfs_rtxnum_t	nrextents;	/* new number of realtime extents */
 	uint8_t		nrextslog;	/* new log2 of sb_rextents */
 	xfs_extlen_t	nrsumblocks;	/* new number of summary blocks */
 	uint		nrsumlevels;	/* new rt summary levels */
@@ -922,7 +910,6 @@ xfs_growfs_rt(
 	xfs_extlen_t	rbmblocks;	/* current number of rt bitmap blocks */
 	xfs_extlen_t	rsumblocks;	/* current number of rt summary blks */
 	xfs_sb_t	*sbp;		/* old superblock */
-	xfs_fsblock_t	sumbno;		/* summary block number */
 	uint8_t		*rsum_cache;	/* old summary cache */
 
 	sbp = &mp->m_sb;
@@ -954,7 +941,7 @@ xfs_growfs_rt(
 		return -EINVAL;
 
 	/* Unsupported realtime features. */
-	if (xfs_has_rmapbt(mp) || xfs_has_reflink(mp))
+	if (xfs_has_rmapbt(mp) || xfs_has_reflink(mp) || xfs_has_quota(mp))
 		return -EOPNOTSUPP;
 
 	nrblocks = in->newblocks;
@@ -976,11 +963,10 @@ xfs_growfs_rt(
 	 */
 	nrextents = nrblocks;
 	do_div(nrextents, in->extsize);
-	nrbmblocks = howmany_64(nrextents, NBBY * sbp->sb_blocksize);
+	nrbmblocks = xfs_rtbitmap_blockcount(mp, nrextents);
 	nrextslog = xfs_highbit32(nrextents);
 	nrsumlevels = nrextslog + 1;
-	nrsumsize = (uint)sizeof(xfs_suminfo_t) * nrsumlevels * nrbmblocks;
-	nrsumblocks = XFS_B_TO_FSB(mp, nrsumsize);
+	nrsumblocks = xfs_rtsummary_blockcount(mp, nrsumlevels, nrbmblocks);
 	nrsumsize = XFS_FSB_TO_B(mp, nrsumblocks);
 	/*
 	 * New summary size can't be more than half the size of
@@ -1023,6 +1009,12 @@ xfs_growfs_rt(
 		     ((sbp->sb_rextents & ((1 << mp->m_blkbit_log) - 1)) != 0);
 	     bmbno < nrbmblocks;
 	     bmbno++) {
+		struct xfs_rtalloc_args	args = {
+			.mp		= mp,
+		};
+		struct xfs_rtalloc_args	nargs = {
+			.mp		= nmp,
+		};
 		struct xfs_trans	*tp;
 		xfs_rfsblock_t		nrblocks_step;
 
@@ -1032,19 +1024,17 @@ xfs_growfs_rt(
 		 * Calculate new sb and mount fields for this round.
 		 */
 		nsbp->sb_rextsize = in->extsize;
+		nmp->m_rtxblklog = -1; /* don't use shift or masking */
 		nsbp->sb_rbmblocks = bmbno + 1;
 		nrblocks_step = (bmbno + 1) * NBBY * nsbp->sb_blocksize *
 				nsbp->sb_rextsize;
 		nsbp->sb_rblocks = min(nrblocks, nrblocks_step);
-		nsbp->sb_rextents = nsbp->sb_rblocks;
-		do_div(nsbp->sb_rextents, nsbp->sb_rextsize);
+		nsbp->sb_rextents = xfs_rtb_to_rtx(nmp, nsbp->sb_rblocks);
 		ASSERT(nsbp->sb_rextents != 0);
 		nsbp->sb_rextslog = xfs_highbit32(nsbp->sb_rextents);
 		nrsumlevels = nmp->m_rsumlevels = nsbp->sb_rextslog + 1;
-		nrsumsize =
-			(uint)sizeof(xfs_suminfo_t) * nrsumlevels *
-			nsbp->sb_rbmblocks;
-		nrsumblocks = XFS_B_TO_FSB(mp, nrsumsize);
+		nrsumblocks = xfs_rtsummary_blockcount(mp, nrsumlevels,
+				nsbp->sb_rbmblocks);
 		nmp->m_rsumsize = nrsumsize = XFS_FSB_TO_B(mp, nrsumblocks);
 		/*
 		 * Start a transaction, get the log reservation.
@@ -1053,6 +1043,9 @@ xfs_growfs_rt(
 				&tp);
 		if (error)
 			break;
+		args.tp = tp;
+		nargs.tp = tp;
+
 		/*
 		 * Lock out other callers by grabbing the bitmap inode lock.
 		 */
@@ -1086,7 +1079,7 @@ xfs_growfs_rt(
 		 */
 		if (sbp->sb_rbmblocks != nsbp->sb_rbmblocks ||
 		    mp->m_rsumlevels != nmp->m_rsumlevels) {
-			error = xfs_rtcopy_summary(mp, nmp, tp);
+			error = xfs_rtcopy_summary(&args, &nargs);
 			if (error)
 				goto error_cancel;
 		}
@@ -1111,9 +1104,9 @@ xfs_growfs_rt(
 		/*
 		 * Free new extent.
 		 */
-		bp = NULL;
-		error = xfs_rtfree_range(nmp, tp, sbp->sb_rextents,
-			nsbp->sb_rextents - sbp->sb_rextents, &bp, &sumbno);
+		error = xfs_rtfree_range(&nargs, sbp->sb_rextents,
+				nsbp->sb_rextents - sbp->sb_rextents);
+		xfs_rtbuf_cache_relse(&nargs);
 		if (error) {
 error_cancel:
 			xfs_trans_cancel(tp);
@@ -1171,59 +1164,60 @@ out_free:
  * parameters.  The length units are all in realtime extents, as is the
  * result block number.
  */
-int					/* error */
+int
 xfs_rtallocate_extent(
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_rtblock_t	bno,		/* starting block number to allocate */
-	xfs_extlen_t	minlen,		/* minimum length to allocate */
-	xfs_extlen_t	maxlen,		/* maximum length to allocate */
-	xfs_extlen_t	*len,		/* out: actual length allocated */
-	int		wasdel,		/* was a delayed allocation extent */
-	xfs_extlen_t	prod,		/* extent product factor */
-	xfs_rtblock_t	*rtblock)	/* out: start block allocated */
+	struct xfs_trans	*tp,
+	xfs_rtxnum_t		start,	/* starting rtext number to allocate */
+	xfs_rtxlen_t		minlen,	/* minimum length to allocate */
+	xfs_rtxlen_t		maxlen,	/* maximum length to allocate */
+	xfs_rtxlen_t		*len,	/* out: actual length allocated */
+	int			wasdel,	/* was a delayed allocation extent */
+	xfs_rtxlen_t		prod,	/* extent product factor */
+	xfs_rtxnum_t		*rtblock) /* out: start rtext allocated */
 {
-	xfs_mount_t	*mp = tp->t_mountp;
-	int		error;		/* error value */
-	xfs_rtblock_t	r;		/* result allocated block */
-	xfs_fsblock_t	sb;		/* summary file block number */
-	struct xfs_buf	*sumbp;		/* summary file block buffer */
-
-	ASSERT(xfs_isilocked(mp->m_rbmip, XFS_ILOCK_EXCL));
+	struct xfs_rtalloc_args	args = {
+		.mp		= tp->t_mountp,
+		.tp		= tp,
+	};
+	int			error;	/* error value */
+	xfs_rtxnum_t		r;	/* result allocated rtext */
+
+	ASSERT(xfs_isilocked(args.mp->m_rbmip, XFS_ILOCK_EXCL));
 	ASSERT(minlen > 0 && minlen <= maxlen);
 
 	/*
 	 * If prod is set then figure out what to do to minlen and maxlen.
 	 */
 	if (prod > 1) {
-		xfs_extlen_t	i;
+		xfs_rtxlen_t	i;
 
 		if ((i = maxlen % prod))
 			maxlen -= i;
 		if ((i = minlen % prod))
 			minlen += prod - i;
 		if (maxlen < minlen) {
-			*rtblock = NULLRTBLOCK;
+			*rtblock = NULLRTEXTNO;
 			return 0;
 		}
 	}
 
 retry:
-	sumbp = NULL;
-	if (bno == 0) {
-		error = xfs_rtallocate_extent_size(mp, tp, minlen, maxlen, len,
-				&sumbp,	&sb, prod, &r);
+	if (start == 0) {
+		error = xfs_rtallocate_extent_size(&args, minlen,
+				maxlen, len, prod, &r);
 	} else {
-		error = xfs_rtallocate_extent_near(mp, tp, bno, minlen, maxlen,
-				len, &sumbp, &sb, prod, &r);
+		error = xfs_rtallocate_extent_near(&args, start, minlen,
+				maxlen, len, prod, &r);
 	}
 
+	xfs_rtbuf_cache_relse(&args);
 	if (error)
 		return error;
 
 	/*
 	 * If it worked, update the superblock.
 	 */
-	if (r != NULLRTBLOCK) {
+	if (r != NULLRTEXTNO) {
 		long	slen = (long)*len;
 
 		ASSERT(*len >= minlen && *len <= maxlen);
@@ -1250,6 +1244,7 @@ xfs_rtmount_init(
 	struct xfs_buf		*bp;	/* buffer for last block of subvolume */
 	struct xfs_sb		*sbp;	/* filesystem superblock copy in mount */
 	xfs_daddr_t		d;	/* address of last block of subvolume */
+	unsigned int		rsumblocks;
 	int			error;
 
 	sbp = &mp->m_sb;
@@ -1261,10 +1256,9 @@ xfs_rtmount_init(
 		return -ENODEV;
 	}
 	mp->m_rsumlevels = sbp->sb_rextslog + 1;
-	mp->m_rsumsize =
-		(uint)sizeof(xfs_suminfo_t) * mp->m_rsumlevels *
-		sbp->sb_rbmblocks;
-	mp->m_rsumsize = roundup(mp->m_rsumsize, sbp->sb_blocksize);
+	rsumblocks = xfs_rtsummary_blockcount(mp, mp->m_rsumlevels,
+			mp->m_sb.sb_rbmblocks);
+	mp->m_rsumsize = XFS_FSB_TO_B(mp, rsumblocks);
 	mp->m_rbmip = mp->m_rsumip = NULL;
 	/*
 	 * Check that the realtime section is an ok size.
@@ -1418,27 +1412,28 @@ xfs_rtunmount_inodes(
  * of rtextents and the fraction.
  * The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ...
  */
-int					/* error */
+int						/* error */
 xfs_rtpick_extent(
-	xfs_mount_t	*mp,		/* file system mount point */
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_extlen_t	len,		/* allocation length (rtextents) */
-	xfs_rtblock_t	*pick)		/* result rt extent */
+	xfs_mount_t		*mp,		/* file system mount point */
+	xfs_trans_t		*tp,		/* transaction pointer */
+	xfs_rtxlen_t		len,		/* allocation length (rtextents) */
+	xfs_rtxnum_t		*pick)		/* result rt extent */
 {
-	xfs_rtblock_t	b;		/* result block */
-	int		log2;		/* log of sequence number */
-	uint64_t	resid;		/* residual after log removed */
-	uint64_t	seq;		/* sequence number of file creation */
-	uint64_t	*seqp;		/* pointer to seqno in inode */
+	xfs_rtxnum_t		b;		/* result rtext */
+	int			log2;		/* log of sequence number */
+	uint64_t		resid;		/* residual after log removed */
+	uint64_t		seq;		/* sequence number of file creation */
+	struct timespec64	ts;		/* timespec in inode */
 
 	ASSERT(xfs_isilocked(mp->m_rbmip, XFS_ILOCK_EXCL));
 
-	seqp = (uint64_t *)&VFS_I(mp->m_rbmip)->i_atime;
+	ts = inode_get_atime(VFS_I(mp->m_rbmip));
 	if (!(mp->m_rbmip->i_diflags & XFS_DIFLAG_NEWRTBM)) {
 		mp->m_rbmip->i_diflags |= XFS_DIFLAG_NEWRTBM;
-		*seqp = 0;
+		seq = 0;
+	} else {
+		seq = ts.tv_sec;
 	}
-	seq = *seqp;
 	if ((log2 = xfs_highbit64(seq)) == -1)
 		b = 0;
 	else {
@@ -1450,7 +1445,8 @@ xfs_rtpick_extent(
 		if (b + len > mp->m_sb.sb_rextents)
 			b = mp->m_sb.sb_rextents - len;
 	}
-	*seqp = seq + 1;
+	ts.tv_sec = seq + 1;
+	inode_set_atime_to_ts(VFS_I(mp->m_rbmip), ts);
 	xfs_trans_log_inode(tp, mp->m_rbmip, XFS_ILOG_CORE);
 	*pick = b;
 	return 0;
diff --git a/fs/xfs/xfs_rtalloc.h b/fs/xfs/xfs_rtalloc.h
index 62c7ad79cb..f7cb9ffe51 100644
--- a/fs/xfs/xfs_rtalloc.h
+++ b/fs/xfs/xfs_rtalloc.h
@@ -11,22 +11,6 @@
 struct xfs_mount;
 struct xfs_trans;
 
-/*
- * XXX: Most of the realtime allocation functions deal in units of realtime
- * extents, not realtime blocks.  This looks funny when paired with the type
- * name and screams for a larger cleanup.
- */
-struct xfs_rtalloc_rec {
-	xfs_rtblock_t		ar_startext;
-	xfs_rtblock_t		ar_extcount;
-};
-
-typedef int (*xfs_rtalloc_query_range_fn)(
-	struct xfs_mount		*mp,
-	struct xfs_trans		*tp,
-	const struct xfs_rtalloc_rec	*rec,
-	void				*priv);
-
 #ifdef CONFIG_XFS_RT
 /*
  * Function prototypes for exported functions.
@@ -40,23 +24,14 @@ typedef int (*xfs_rtalloc_query_range_fn)(
 int					/* error */
 xfs_rtallocate_extent(
 	struct xfs_trans	*tp,	/* transaction pointer */
-	xfs_rtblock_t		bno,	/* starting block number to allocate */
-	xfs_extlen_t		minlen,	/* minimum length to allocate */
-	xfs_extlen_t		maxlen,	/* maximum length to allocate */
-	xfs_extlen_t		*len,	/* out: actual length allocated */
+	xfs_rtxnum_t		start,	/* starting rtext number to allocate */
+	xfs_rtxlen_t		minlen,	/* minimum length to allocate */
+	xfs_rtxlen_t		maxlen,	/* maximum length to allocate */
+	xfs_rtxlen_t		*len,	/* out: actual length allocated */
 	int			wasdel,	/* was a delayed allocation extent */
-	xfs_extlen_t		prod,	/* extent product factor */
-	xfs_rtblock_t		*rtblock); /* out: start block allocated */
+	xfs_rtxlen_t		prod,	/* extent product factor */
+	xfs_rtxnum_t		*rtblock); /* out: start rtext allocated */
 
-/*
- * Free an extent in the realtime subvolume.  Length is expressed in
- * realtime extents, as is the block number.
- */
-int					/* error */
-xfs_rtfree_extent(
-	struct xfs_trans	*tp,	/* transaction pointer */
-	xfs_rtblock_t		bno,	/* starting block number to free */
-	xfs_extlen_t		len);	/* length of extent freed */
 
 /*
  * Initialize realtime fields in the mount structure.
@@ -87,8 +62,8 @@ int					/* error */
 xfs_rtpick_extent(
 	struct xfs_mount	*mp,	/* file system mount point */
 	struct xfs_trans	*tp,	/* transaction pointer */
-	xfs_extlen_t		len,	/* allocation length (rtextents) */
-	xfs_rtblock_t		*pick);	/* result rt extent */
+	xfs_rtxlen_t		len,	/* allocation length (rtextents) */
+	xfs_rtxnum_t		*pick);	/* result rt extent */
 
 /*
  * Grow the realtime area of the filesystem.
@@ -98,55 +73,12 @@ xfs_growfs_rt(
 	struct xfs_mount	*mp,	/* file system mount structure */
 	xfs_growfs_rt_t		*in);	/* user supplied growfs struct */
 
-/*
- * From xfs_rtbitmap.c
- */
-int xfs_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp,
-		  xfs_rtblock_t block, int issum, struct xfs_buf **bpp);
-int xfs_rtcheck_range(struct xfs_mount *mp, struct xfs_trans *tp,
-		      xfs_rtblock_t start, xfs_extlen_t len, int val,
-		      xfs_rtblock_t *new, int *stat);
-int xfs_rtfind_back(struct xfs_mount *mp, struct xfs_trans *tp,
-		    xfs_rtblock_t start, xfs_rtblock_t limit,
-		    xfs_rtblock_t *rtblock);
-int xfs_rtfind_forw(struct xfs_mount *mp, struct xfs_trans *tp,
-		    xfs_rtblock_t start, xfs_rtblock_t limit,
-		    xfs_rtblock_t *rtblock);
-int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp,
-		       xfs_rtblock_t start, xfs_extlen_t len, int val);
-int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp,
-			     int log, xfs_rtblock_t bbno, int delta,
-			     struct xfs_buf **rbpp, xfs_fsblock_t *rsb,
-			     xfs_suminfo_t *sum);
-int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log,
-			 xfs_rtblock_t bbno, int delta, struct xfs_buf **rbpp,
-			 xfs_fsblock_t *rsb);
-int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp,
-		     xfs_rtblock_t start, xfs_extlen_t len,
-		     struct xfs_buf **rbpp, xfs_fsblock_t *rsb);
-int xfs_rtalloc_query_range(struct xfs_mount *mp, struct xfs_trans *tp,
-		const struct xfs_rtalloc_rec *low_rec,
-		const struct xfs_rtalloc_rec *high_rec,
-		xfs_rtalloc_query_range_fn fn, void *priv);
-int xfs_rtalloc_query_all(struct xfs_mount *mp, struct xfs_trans *tp,
-			  xfs_rtalloc_query_range_fn fn,
-			  void *priv);
-bool xfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno);
-int xfs_rtalloc_extent_is_free(struct xfs_mount *mp, struct xfs_trans *tp,
-			       xfs_rtblock_t start, xfs_extlen_t len,
-			       bool *is_free);
 int xfs_rtalloc_reinit_frextents(struct xfs_mount *mp);
 #else
-# define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb)    (ENOSYS)
-# define xfs_rtfree_extent(t,b,l)                       (ENOSYS)
-# define xfs_rtpick_extent(m,t,l,rb)                    (ENOSYS)
-# define xfs_growfs_rt(mp,in)                           (ENOSYS)
-# define xfs_rtalloc_query_range(t,l,h,f,p)             (ENOSYS)
-# define xfs_rtalloc_query_all(m,t,f,p)                 (ENOSYS)
-# define xfs_rtbuf_get(m,t,b,i,p)                       (ENOSYS)
-# define xfs_verify_rtbno(m, r)			(false)
-# define xfs_rtalloc_extent_is_free(m,t,s,l,i)          (ENOSYS)
-# define xfs_rtalloc_reinit_frextents(m)                (0)
+# define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb)	(-ENOSYS)
+# define xfs_rtpick_extent(m,t,l,rb)			(-ENOSYS)
+# define xfs_growfs_rt(mp,in)				(-ENOSYS)
+# define xfs_rtalloc_reinit_frextents(m)		(0)
 static inline int		/* error */
 xfs_rtmount_init(
 	xfs_mount_t	*mp)	/* file system mount structure */
@@ -157,7 +89,7 @@ xfs_rtmount_init(
 	xfs_warn(mp, "Not built with CONFIG_XFS_RT");
 	return -ENOSYS;
 }
-# define xfs_rtmount_inodes(m)  (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))
+# define xfs_rtmount_inodes(m)  (((mp)->m_sb.sb_rblocks == 0)? 0 : (-ENOSYS))
 # define xfs_rtunmount_inodes(m)
 #endif	/* CONFIG_XFS_RT */
 
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 13007b6bc9..3f8e6233ff 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -42,6 +42,7 @@
 #include "xfs_xattr.h"
 #include "xfs_iunlink_item.h"
 #include "xfs_dahash_test.h"
+#include "xfs_rtbitmap.h"
 #include "scrub/stats.h"
 
 #include <linux/magic.h>
@@ -361,14 +362,15 @@ STATIC int
 xfs_blkdev_get(
 	xfs_mount_t		*mp,
 	const char		*name,
-	struct block_device	**bdevp)
+	struct bdev_handle	**handlep)
 {
 	int			error = 0;
 
-	*bdevp = blkdev_get_by_path(name, BLK_OPEN_READ | BLK_OPEN_WRITE,
-				    mp->m_super, &fs_holder_ops);
-	if (IS_ERR(*bdevp)) {
-		error = PTR_ERR(*bdevp);
+	*handlep = bdev_open_by_path(name, BLK_OPEN_READ | BLK_OPEN_WRITE,
+				     mp->m_super, &fs_holder_ops);
+	if (IS_ERR(*handlep)) {
+		error = PTR_ERR(*handlep);
+		*handlep = NULL;
 		xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
 	}
 
@@ -433,7 +435,7 @@ xfs_open_devices(
 {
 	struct super_block	*sb = mp->m_super;
 	struct block_device	*ddev = sb->s_bdev;
-	struct block_device	*logdev = NULL, *rtdev = NULL;
+	struct bdev_handle	*logdev_handle = NULL, *rtdev_handle = NULL;
 	int			error;
 
 	/*
@@ -446,17 +448,19 @@ xfs_open_devices(
 	 * Open real time and log devices - order is important.
 	 */
 	if (mp->m_logname) {
-		error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
+		error = xfs_blkdev_get(mp, mp->m_logname, &logdev_handle);
 		if (error)
 			goto out_relock;
 	}
 
 	if (mp->m_rtname) {
-		error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
+		error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev_handle);
 		if (error)
 			goto out_close_logdev;
 
-		if (rtdev == ddev || rtdev == logdev) {
+		if (rtdev_handle->bdev == ddev ||
+		    (logdev_handle &&
+		     rtdev_handle->bdev == logdev_handle->bdev)) {
 			xfs_warn(mp,
 	"Cannot mount filesystem with identical rtdev and ddev/logdev.");
 			error = -EINVAL;
@@ -468,22 +472,25 @@ xfs_open_devices(
 	 * Setup xfs_mount buffer target pointers
 	 */
 	error = -ENOMEM;
-	mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev);
+	mp->m_ddev_targp = xfs_alloc_buftarg(mp, sb->s_bdev_handle);
 	if (!mp->m_ddev_targp)
 		goto out_close_rtdev;
 
-	if (rtdev) {
-		mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev);
+	if (rtdev_handle) {
+		mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev_handle);
 		if (!mp->m_rtdev_targp)
 			goto out_free_ddev_targ;
 	}
 
-	if (logdev && logdev != ddev) {
-		mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev);
+	if (logdev_handle && logdev_handle->bdev != ddev) {
+		mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev_handle);
 		if (!mp->m_logdev_targp)
 			goto out_free_rtdev_targ;
 	} else {
 		mp->m_logdev_targp = mp->m_ddev_targp;
+		/* Handle won't be used, drop it */
+		if (logdev_handle)
+			bdev_release(logdev_handle);
 	}
 
 	error = 0;
@@ -497,11 +504,11 @@ out_relock:
  out_free_ddev_targ:
 	xfs_free_buftarg(mp->m_ddev_targp);
  out_close_rtdev:
-	 if (rtdev)
-		 blkdev_put(rtdev, sb);
+	 if (rtdev_handle)
+		bdev_release(rtdev_handle);
  out_close_logdev:
-	if (logdev && logdev != ddev)
-		blkdev_put(logdev, sb);
+	if (logdev_handle)
+		bdev_release(logdev_handle);
 	goto out_relock;
 }
 
@@ -890,7 +897,7 @@ xfs_fs_statfs(
 
 		statp->f_blocks = sbp->sb_rblocks;
 		freertx = percpu_counter_sum_positive(&mp->m_frextents);
-		statp->f_bavail = statp->f_bfree = freertx * sbp->sb_rextsize;
+		statp->f_bavail = statp->f_bfree = xfs_rtx_to_rtb(mp, freertx);
 	}
 
 	return 0;
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index 8c0bfc9a33..305c9d07bf 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -24,6 +24,7 @@
 #include "xfs_dquot_item.h"
 #include "xfs_dquot.h"
 #include "xfs_icache.h"
+#include "xfs_rtbitmap.h"
 
 struct kmem_cache	*xfs_trans_cache;
 
@@ -655,6 +656,10 @@ xfs_trans_unreserve_and_mod_sb(
 	mp->m_sb.sb_agcount += tp->t_agcount_delta;
 	mp->m_sb.sb_imax_pct += tp->t_imaxpct_delta;
 	mp->m_sb.sb_rextsize += tp->t_rextsize_delta;
+	if (tp->t_rextsize_delta) {
+		mp->m_rtxblklog = log2_if_power2(mp->m_sb.sb_rextsize);
+		mp->m_rtxblkmask = mask64_if_power2(mp->m_sb.sb_rextsize);
+	}
 	mp->m_sb.sb_rbmblocks += tp->t_rbmblocks_delta;
 	mp->m_sb.sb_rblocks += tp->t_rblocks_delta;
 	mp->m_sb.sb_rextents += tp->t_rextents_delta;
@@ -1196,7 +1201,7 @@ xfs_trans_alloc_inode(
 
 retry:
 	error = xfs_trans_alloc(mp, resv, dblocks,
-			rblocks / mp->m_sb.sb_rextsize,
+			xfs_extlen_to_rtxlen(mp, rblocks),
 			force ? XFS_TRANS_RESERVE : 0, &tp);
 	if (error)
 		return error;
diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
index a3975f325f..987843f84d 100644
--- a/fs/xfs/xfs_xattr.c
+++ b/fs/xfs/xfs_xattr.c
@@ -186,7 +186,7 @@ static const struct xattr_handler xfs_xattr_security_handler = {
 	.set	= xfs_xattr_set,
 };
 
-const struct xattr_handler *xfs_xattr_handlers[] = {
+const struct xattr_handler * const xfs_xattr_handlers[] = {
 	&xfs_xattr_user_handler,
 	&xfs_xattr_trusted_handler,
 	&xfs_xattr_security_handler,
diff --git a/fs/xfs/xfs_xattr.h b/fs/xfs/xfs_xattr.h
index 2b09133b1b..cec766cad2 100644
--- a/fs/xfs/xfs_xattr.h
+++ b/fs/xfs/xfs_xattr.h
@@ -8,6 +8,6 @@
 
 int xfs_attr_change(struct xfs_da_args *args);
 
-extern const struct xattr_handler *xfs_xattr_handlers[];
+extern const struct xattr_handler * const xfs_xattr_handlers[];
 
 #endif /* __XFS_XATTR_H__ */