diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c
new file mode 100644
index 0000000..163305a
--- /dev/null
+++ b/fs/xfs/xfs_bmap_btree.c
@@ -0,0 +1,2807 @@
+/*
+ * Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+
+#include "xfs.h"
+
+#include "xfs_macros.h"
+#include "xfs_types.h"
+#include "xfs_inum.h"
+#include "xfs_log.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_ag.h"
+#include "xfs_dir.h"
+#include "xfs_dir2.h"
+#include "xfs_dmapi.h"
+#include "xfs_mount.h"
+#include "xfs_alloc_btree.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_ialloc_btree.h"
+#include "xfs_btree.h"
+#include "xfs_ialloc.h"
+#include "xfs_itable.h"
+#include "xfs_attr_sf.h"
+#include "xfs_dir_sf.h"
+#include "xfs_dir2_sf.h"
+#include "xfs_dinode.h"
+#include "xfs_inode_item.h"
+#include "xfs_inode.h"
+#include "xfs_alloc.h"
+#include "xfs_bit.h"
+#include "xfs_bmap.h"
+#include "xfs_error.h"
+#include "xfs_quota.h"
+
+#if defined(XFS_BMBT_TRACE)
+ktrace_t	*xfs_bmbt_trace_buf;
+#endif
+
+/*
+ * Prototypes for internal btree functions.
+ */
+
+
+STATIC int xfs_bmbt_killroot(xfs_btree_cur_t *);
+STATIC void xfs_bmbt_log_keys(xfs_btree_cur_t *, xfs_buf_t *, int, int);
+STATIC void xfs_bmbt_log_ptrs(xfs_btree_cur_t *, xfs_buf_t *, int, int);
+STATIC int xfs_bmbt_lshift(xfs_btree_cur_t *, int, int *);
+STATIC int xfs_bmbt_rshift(xfs_btree_cur_t *, int, int *);
+STATIC int xfs_bmbt_split(xfs_btree_cur_t *, int, xfs_fsblock_t *,
+		xfs_bmbt_key_t *, xfs_btree_cur_t **, int *);
+STATIC int xfs_bmbt_updkey(xfs_btree_cur_t *, xfs_bmbt_key_t *, int);
+
+
+#if defined(XFS_BMBT_TRACE)
+
+static char	ARGS[] = "args";
+static char	ENTRY[] = "entry";
+static char	ERROR[] = "error";
+#undef EXIT
+static char	EXIT[] = "exit";
+
+/*
+ * Add a trace buffer entry for the arguments given to the routine,
+ * generic form.
+ */
+STATIC void
+xfs_bmbt_trace_enter(
+	char		*func,
+	xfs_btree_cur_t	*cur,
+	char		*s,
+	int		type,
+	int		line,
+	__psunsigned_t	a0,
+	__psunsigned_t	a1,
+	__psunsigned_t	a2,
+	__psunsigned_t	a3,
+	__psunsigned_t	a4,
+	__psunsigned_t	a5,
+	__psunsigned_t	a6,
+	__psunsigned_t	a7,
+	__psunsigned_t	a8,
+	__psunsigned_t	a9,
+	__psunsigned_t	a10)
+{
+	xfs_inode_t	*ip;
+	int		whichfork;
+
+	ip = cur->bc_private.b.ip;
+	whichfork = cur->bc_private.b.whichfork;
+	ktrace_enter(xfs_bmbt_trace_buf,
+		(void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
+		(void *)func, (void *)s, (void *)ip, (void *)cur,
+		(void *)a0, (void *)a1, (void *)a2, (void *)a3,
+		(void *)a4, (void *)a5, (void *)a6, (void *)a7,
+		(void *)a8, (void *)a9, (void *)a10);
+	ASSERT(ip->i_btrace);
+	ktrace_enter(ip->i_btrace,
+		(void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
+		(void *)func, (void *)s, (void *)ip, (void *)cur,
+		(void *)a0, (void *)a1, (void *)a2, (void *)a3,
+		(void *)a4, (void *)a5, (void *)a6, (void *)a7,
+		(void *)a8, (void *)a9, (void *)a10);
+}
+/*
+ * Add a trace buffer entry for arguments, for a buffer & 1 integer arg.
+ */
+STATIC void
+xfs_bmbt_trace_argbi(
+	char		*func,
+	xfs_btree_cur_t	*cur,
+	xfs_buf_t	*b,
+	int		i,
+	int		line)
+{
+	xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGBI, line,
+		(__psunsigned_t)b, i, 0, 0,
+		0, 0, 0, 0,
+		0, 0, 0);
+}
+
+/*
+ * Add a trace buffer entry for arguments, for a buffer & 2 integer args.
+ */
+STATIC void
+xfs_bmbt_trace_argbii(
+	char		*func,
+	xfs_btree_cur_t	*cur,
+	xfs_buf_t	*b,
+	int		i0,
+	int		i1,
+	int		line)
+{
+	xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGBII, line,
+		(__psunsigned_t)b, i0, i1, 0,
+		0, 0, 0, 0,
+		0, 0, 0);
+}
+
+/*
+ * Add a trace buffer entry for arguments, for 3 block-length args
+ * and an integer arg.
+ */
+STATIC void
+xfs_bmbt_trace_argfffi(
+	char			*func,
+	xfs_btree_cur_t		*cur,
+	xfs_dfiloff_t		o,
+	xfs_dfsbno_t		b,
+	xfs_dfilblks_t		i,
+	int			j,
+	int			line)
+{
+	xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGFFFI, line,
+		o >> 32, (int)o, b >> 32, (int)b,
+		i >> 32, (int)i, (int)j, 0,
+		0, 0, 0);
+}
+
+/*
+ * Add a trace buffer entry for arguments, for one integer arg.
+ */
+STATIC void
+xfs_bmbt_trace_argi(
+	char		*func,
+	xfs_btree_cur_t	*cur,
+	int		i,
+	int		line)
+{
+	xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGI, line,
+		i, 0, 0, 0,
+		0, 0, 0, 0,
+		0, 0, 0);
+}
+
+/*
+ * Add a trace buffer entry for arguments, for int, fsblock, key.
+ */
+STATIC void
+xfs_bmbt_trace_argifk(
+	char			*func,
+	xfs_btree_cur_t		*cur,
+	int			i,
+	xfs_fsblock_t		f,
+	xfs_bmbt_key_t		*k,
+	int			line)
+{
+	xfs_dfsbno_t		d;
+	xfs_dfiloff_t		o;
+
+	d = (xfs_dfsbno_t)f;
+	o = INT_GET(k->br_startoff, ARCH_CONVERT);
+	xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGIFK, line,
+		i, d >> 32, (int)d, o >> 32,
+		(int)o, 0, 0, 0,
+		0, 0, 0);
+}
+
+/*
+ * Add a trace buffer entry for arguments, for int, fsblock, rec.
+ */
+STATIC void
+xfs_bmbt_trace_argifr(
+	char			*func,
+	xfs_btree_cur_t		*cur,
+	int			i,
+	xfs_fsblock_t		f,
+	xfs_bmbt_rec_t		*r,
+	int			line)
+{
+	xfs_dfsbno_t		b;
+	xfs_dfilblks_t		c;
+	xfs_dfsbno_t		d;
+	xfs_dfiloff_t		o;
+	xfs_bmbt_irec_t		s;
+
+	d = (xfs_dfsbno_t)f;
+	xfs_bmbt_disk_get_all(r, &s);
+	o = (xfs_dfiloff_t)s.br_startoff;
+	b = (xfs_dfsbno_t)s.br_startblock;
+	c = s.br_blockcount;
+	xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGIFR, line,
+		i, d >> 32, (int)d, o >> 32,
+		(int)o, b >> 32, (int)b, c >> 32,
+		(int)c, 0, 0);
+}
+
+/*
+ * Add a trace buffer entry for arguments, for int, key.
+ */
+STATIC void
+xfs_bmbt_trace_argik(
+	char			*func,
+	xfs_btree_cur_t		*cur,
+	int			i,
+	xfs_bmbt_key_t		*k,
+	int			line)
+{
+	xfs_dfiloff_t		o;
+
+	o = INT_GET(k->br_startoff, ARCH_CONVERT);
+	xfs_bmbt_trace_enter(func, cur, ARGS, XFS_BMBT_KTRACE_ARGIFK, line,
+		i, o >> 32, (int)o, 0,
+		0, 0, 0, 0,
+		0, 0, 0);
+}
+
+/*
+ * Add a trace buffer entry for the cursor/operation.
+ */
+STATIC void
+xfs_bmbt_trace_cursor(
+	char		*func,
+	xfs_btree_cur_t	*cur,
+	char		*s,
+	int		line)
+{
+	xfs_bmbt_rec_t	r;
+
+	xfs_bmbt_set_all(&r, &cur->bc_rec.b);
+	xfs_bmbt_trace_enter(func, cur, s, XFS_BMBT_KTRACE_CUR, line,
+		(cur->bc_nlevels << 24) | (cur->bc_private.b.flags << 16) |
+		cur->bc_private.b.allocated,
+		INT_GET(r.l0, ARCH_CONVERT) >> 32, (int)INT_GET(r.l0, ARCH_CONVERT), INT_GET(r.l1, ARCH_CONVERT) >> 32, (int)INT_GET(r.l1, ARCH_CONVERT),
+		(unsigned long)cur->bc_bufs[0], (unsigned long)cur->bc_bufs[1],
+		(unsigned long)cur->bc_bufs[2], (unsigned long)cur->bc_bufs[3],
+		(cur->bc_ptrs[0] << 16) | cur->bc_ptrs[1],
+		(cur->bc_ptrs[2] << 16) | cur->bc_ptrs[3]);
+}
+
+#define	XFS_BMBT_TRACE_ARGBI(c,b,i)	\
+	xfs_bmbt_trace_argbi(fname, c, b, i, __LINE__)
+#define	XFS_BMBT_TRACE_ARGBII(c,b,i,j)	\
+	xfs_bmbt_trace_argbii(fname, c, b, i, j, __LINE__)
+#define	XFS_BMBT_TRACE_ARGFFFI(c,o,b,i,j)	\
+	xfs_bmbt_trace_argfffi(fname, c, o, b, i, j, __LINE__)
+#define	XFS_BMBT_TRACE_ARGI(c,i)	\
+	xfs_bmbt_trace_argi(fname, c, i, __LINE__)
+#define	XFS_BMBT_TRACE_ARGIFK(c,i,f,k)	\
+	xfs_bmbt_trace_argifk(fname, c, i, f, k, __LINE__)
+#define	XFS_BMBT_TRACE_ARGIFR(c,i,f,r)	\
+	xfs_bmbt_trace_argifr(fname, c, i, f, r, __LINE__)
+#define	XFS_BMBT_TRACE_ARGIK(c,i,k)	\
+	xfs_bmbt_trace_argik(fname, c, i, k, __LINE__)
+#define	XFS_BMBT_TRACE_CURSOR(c,s)	\
+	xfs_bmbt_trace_cursor(fname, c, s, __LINE__)
+#else
+#define	XFS_BMBT_TRACE_ARGBI(c,b,i)
+#define	XFS_BMBT_TRACE_ARGBII(c,b,i,j)
+#define	XFS_BMBT_TRACE_ARGFFFI(c,o,b,i,j)
+#define	XFS_BMBT_TRACE_ARGI(c,i)
+#define	XFS_BMBT_TRACE_ARGIFK(c,i,f,k)
+#define	XFS_BMBT_TRACE_ARGIFR(c,i,f,r)
+#define	XFS_BMBT_TRACE_ARGIK(c,i,k)
+#define	XFS_BMBT_TRACE_CURSOR(c,s)
+#endif	/* XFS_BMBT_TRACE */
+
+
+/*
+ * Internal functions.
+ */
+
+/*
+ * Delete record pointed to by cur/level.
+ */
+STATIC int					/* error */
+xfs_bmbt_delrec(
+	xfs_btree_cur_t		*cur,
+	int			level,
+	int			*stat)		/* success/failure */
+{
+	xfs_bmbt_block_t	*block;		/* bmap btree block */
+	xfs_fsblock_t		bno;		/* fs-relative block number */
+	xfs_buf_t		*bp;		/* buffer for block */
+	int			error;		/* error return value */
+#ifdef XFS_BMBT_TRACE
+	static char		fname[] = "xfs_bmbt_delrec";
+#endif
+	int			i;		/* loop counter */
+	int			j;		/* temp state */
+	xfs_bmbt_key_t		key;		/* bmap btree key */
+	xfs_bmbt_key_t		*kp=NULL;	/* pointer to bmap btree key */
+	xfs_fsblock_t		lbno;		/* left sibling block number */
+	xfs_buf_t		*lbp;		/* left buffer pointer */
+	xfs_bmbt_block_t	*left;		/* left btree block */
+	xfs_bmbt_key_t		*lkp;		/* left btree key */
+	xfs_bmbt_ptr_t		*lpp;		/* left address pointer */
+	int			lrecs=0;	/* left record count */
+	xfs_bmbt_rec_t		*lrp;		/* left record pointer */
+	xfs_mount_t		*mp;		/* file system mount point */
+	xfs_bmbt_ptr_t		*pp;		/* pointer to bmap block addr */
+	int			ptr;		/* key/record index */
+	xfs_fsblock_t		rbno;		/* right sibling block number */
+	xfs_buf_t		*rbp;		/* right buffer pointer */
+	xfs_bmbt_block_t	*right;		/* right btree block */
+	xfs_bmbt_key_t		*rkp;		/* right btree key */
+	xfs_bmbt_rec_t		*rp;		/* pointer to bmap btree rec */
+	xfs_bmbt_ptr_t		*rpp;		/* right address pointer */
+	xfs_bmbt_block_t	*rrblock;	/* right-right btree block */
+	xfs_buf_t		*rrbp;		/* right-right buffer pointer */
+	int			rrecs=0;	/* right record count */
+	xfs_bmbt_rec_t		*rrp;		/* right record pointer */
+	xfs_btree_cur_t		*tcur;		/* temporary btree cursor */
+	int			numrecs;	/* temporary numrec count */
+	int			numlrecs, numrrecs;
+
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	XFS_BMBT_TRACE_ARGI(cur, level);
+	ptr = cur->bc_ptrs[level];
+	tcur = (xfs_btree_cur_t *)0;
+	if (ptr == 0) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	block = xfs_bmbt_get_block(cur, level, &bp);
+	numrecs = INT_GET(block->bb_numrecs, ARCH_CONVERT);
+#ifdef DEBUG
+	if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		goto error0;
+	}
+#endif
+	if (ptr > numrecs) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	XFS_STATS_INC(xs_bmbt_delrec);
+	if (level > 0) {
+		kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
+		pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
+#ifdef DEBUG
+		for (i = ptr; i < numrecs; i++) {
+			if ((error = xfs_btree_check_lptr(cur, INT_GET(pp[i], ARCH_CONVERT), level))) {
+				XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+				goto error0;
+			}
+		}
+#endif
+		if (ptr < numrecs) {
+			memmove(&kp[ptr - 1], &kp[ptr],
+				(numrecs - ptr) * sizeof(*kp));
+			memmove(&pp[ptr - 1], &pp[ptr], /* INT_: direct copy */
+				(numrecs - ptr) * sizeof(*pp));
+			xfs_bmbt_log_ptrs(cur, bp, ptr, numrecs - 1);
+			xfs_bmbt_log_keys(cur, bp, ptr, numrecs - 1);
+		}
+	} else {
+		rp = XFS_BMAP_REC_IADDR(block, 1, cur);
+		if (ptr < numrecs) {
+			memmove(&rp[ptr - 1], &rp[ptr],
+				(numrecs - ptr) * sizeof(*rp));
+			xfs_bmbt_log_recs(cur, bp, ptr, numrecs - 1);
+		}
+		if (ptr == 1) {
+			INT_SET(key.br_startoff, ARCH_CONVERT, xfs_bmbt_disk_get_startoff(rp));
+			kp = &key;
+		}
+	}
+	numrecs--;
+	INT_SET(block->bb_numrecs, ARCH_CONVERT, numrecs);
+	xfs_bmbt_log_block(cur, bp, XFS_BB_NUMRECS);
+	/*
+	 * We're at the root level.
+	 * First, shrink the root block in-memory.
+	 * Try to get rid of the next level down.
+	 * If we can't then there's nothing left to do.
+	 */
+	if (level == cur->bc_nlevels - 1) {
+		xfs_iroot_realloc(cur->bc_private.b.ip, -1,
+			cur->bc_private.b.whichfork);
+		if ((error = xfs_bmbt_killroot(cur))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+		if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &j))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 1;
+		return 0;
+	}
+	if (ptr == 1 && (error = xfs_bmbt_updkey(cur, kp, level + 1))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		goto error0;
+	}
+	if (numrecs >= XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
+		if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &j))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 1;
+		return 0;
+	}
+	rbno = INT_GET(block->bb_rightsib, ARCH_CONVERT);
+	lbno = INT_GET(block->bb_leftsib, ARCH_CONVERT);
+	/*
+	 * One child of root, need to get a chance to copy its contents
+	 * into the root and delete it. Can't go up to next level,
+	 * there's nothing to delete there.
+	 */
+	if (lbno == NULLFSBLOCK && rbno == NULLFSBLOCK &&
+	    level == cur->bc_nlevels - 2) {
+		if ((error = xfs_bmbt_killroot(cur))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+		if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &i))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 1;
+		return 0;
+	}
+	ASSERT(rbno != NULLFSBLOCK || lbno != NULLFSBLOCK);
+	if ((error = xfs_btree_dup_cursor(cur, &tcur))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		goto error0;
+	}
+	bno = NULLFSBLOCK;
+	if (rbno != NULLFSBLOCK) {
+		i = xfs_btree_lastrec(tcur, level);
+		XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
+		if ((error = xfs_bmbt_increment(tcur, level, &i))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+		XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
+		i = xfs_btree_lastrec(tcur, level);
+		XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
+		rbp = tcur->bc_bufs[level];
+		right = XFS_BUF_TO_BMBT_BLOCK(rbp);
+#ifdef DEBUG
+		if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+#endif
+		bno = INT_GET(right->bb_leftsib, ARCH_CONVERT);
+		if (INT_GET(right->bb_numrecs, ARCH_CONVERT) - 1 >=
+		    XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
+			if ((error = xfs_bmbt_lshift(tcur, level, &i))) {
+				XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+				goto error0;
+			}
+			if (i) {
+				ASSERT(INT_GET(block->bb_numrecs, ARCH_CONVERT) >=
+				       XFS_BMAP_BLOCK_IMINRECS(level, tcur));
+				xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
+				tcur = NULL;
+				if (level > 0) {
+					if ((error = xfs_bmbt_decrement(cur,
+							level, &i))) {
+						XFS_BMBT_TRACE_CURSOR(cur,
+							ERROR);
+						goto error0;
+					}
+				}
+				XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+				*stat = 1;
+				return 0;
+			}
+		}
+		rrecs = INT_GET(right->bb_numrecs, ARCH_CONVERT);
+		if (lbno != NULLFSBLOCK) {
+			i = xfs_btree_firstrec(tcur, level);
+			XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
+			if ((error = xfs_bmbt_decrement(tcur, level, &i))) {
+				XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+				goto error0;
+			}
+			XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
+		}
+	}
+	if (lbno != NULLFSBLOCK) {
+		i = xfs_btree_firstrec(tcur, level);
+		XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
+		/*
+		 * decrement to last in block
+		 */
+		if ((error = xfs_bmbt_decrement(tcur, level, &i))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+		i = xfs_btree_firstrec(tcur, level);
+		XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
+		lbp = tcur->bc_bufs[level];
+		left = XFS_BUF_TO_BMBT_BLOCK(lbp);
+#ifdef DEBUG
+		if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+#endif
+		bno = INT_GET(left->bb_rightsib, ARCH_CONVERT);
+		if (INT_GET(left->bb_numrecs, ARCH_CONVERT) - 1 >=
+		    XFS_BMAP_BLOCK_IMINRECS(level, cur)) {
+			if ((error = xfs_bmbt_rshift(tcur, level, &i))) {
+				XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+				goto error0;
+			}
+			if (i) {
+				ASSERT(INT_GET(block->bb_numrecs, ARCH_CONVERT) >=
+				       XFS_BMAP_BLOCK_IMINRECS(level, tcur));
+				xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
+				tcur = NULL;
+				if (level == 0)
+					cur->bc_ptrs[0]++;
+				XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+				*stat = 1;
+				return 0;
+			}
+		}
+		lrecs = INT_GET(left->bb_numrecs, ARCH_CONVERT);
+	}
+	xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
+	tcur = NULL;
+	mp = cur->bc_mp;
+	ASSERT(bno != NULLFSBLOCK);
+	if (lbno != NULLFSBLOCK &&
+	    lrecs + INT_GET(block->bb_numrecs, ARCH_CONVERT) <= XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
+		rbno = bno;
+		right = block;
+		rbp = bp;
+		if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, lbno, 0, &lbp,
+				XFS_BMAP_BTREE_REF))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+		left = XFS_BUF_TO_BMBT_BLOCK(lbp);
+		if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+	} else if (rbno != NULLFSBLOCK &&
+		   rrecs + INT_GET(block->bb_numrecs, ARCH_CONVERT) <=
+		   XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
+		lbno = bno;
+		left = block;
+		lbp = bp;
+		if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, rbno, 0, &rbp,
+				XFS_BMAP_BTREE_REF))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+		right = XFS_BUF_TO_BMBT_BLOCK(rbp);
+		if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+		lrecs = INT_GET(left->bb_numrecs, ARCH_CONVERT);
+	} else {
+		if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &i))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 1;
+		return 0;
+	}
+	numlrecs = INT_GET(left->bb_numrecs, ARCH_CONVERT);
+	numrrecs = INT_GET(right->bb_numrecs, ARCH_CONVERT);
+	if (level > 0) {
+		lkp = XFS_BMAP_KEY_IADDR(left, numlrecs + 1, cur);
+		lpp = XFS_BMAP_PTR_IADDR(left, numlrecs + 1, cur);
+		rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
+		rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
+#ifdef DEBUG
+		for (i = 0; i < numrrecs; i++) {
+			if ((error = xfs_btree_check_lptr(cur, INT_GET(rpp[i], ARCH_CONVERT), level))) {
+				XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+				goto error0;
+			}
+		}
+#endif
+		memcpy(lkp, rkp, numrrecs * sizeof(*lkp));
+		memcpy(lpp, rpp, numrrecs * sizeof(*lpp));
+		xfs_bmbt_log_keys(cur, lbp, numlrecs + 1, numlrecs + numrrecs);
+		xfs_bmbt_log_ptrs(cur, lbp, numlrecs + 1, numlrecs + numrrecs);
+	} else {
+		lrp = XFS_BMAP_REC_IADDR(left, numlrecs + 1, cur);
+		rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
+		memcpy(lrp, rrp, numrrecs * sizeof(*lrp));
+		xfs_bmbt_log_recs(cur, lbp, numlrecs + 1, numlrecs + numrrecs);
+	}
+	INT_MOD(left->bb_numrecs, ARCH_CONVERT, numrrecs);
+	left->bb_rightsib = right->bb_rightsib; /* INT_: direct copy */
+	xfs_bmbt_log_block(cur, lbp, XFS_BB_RIGHTSIB | XFS_BB_NUMRECS);
+	if (INT_GET(left->bb_rightsib, ARCH_CONVERT) != NULLDFSBNO) {
+		if ((error = xfs_btree_read_bufl(mp, cur->bc_tp,
+				INT_GET(left->bb_rightsib, ARCH_CONVERT),
+				0, &rrbp, XFS_BMAP_BTREE_REF))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+		rrblock = XFS_BUF_TO_BMBT_BLOCK(rrbp);
+		if ((error = xfs_btree_check_lblock(cur, rrblock, level, rrbp))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			goto error0;
+		}
+		INT_SET(rrblock->bb_leftsib, ARCH_CONVERT, lbno);
+		xfs_bmbt_log_block(cur, rrbp, XFS_BB_LEFTSIB);
+	}
+	xfs_bmap_add_free(XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(rbp)), 1,
+		cur->bc_private.b.flist, mp);
+	cur->bc_private.b.ip->i_d.di_nblocks--;
+	xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip, XFS_ILOG_CORE);
+	XFS_TRANS_MOD_DQUOT_BYINO(mp, cur->bc_tp, cur->bc_private.b.ip,
+			XFS_TRANS_DQ_BCOUNT, -1L);
+	xfs_trans_binval(cur->bc_tp, rbp);
+	if (bp != lbp) {
+		cur->bc_bufs[level] = lbp;
+		cur->bc_ptrs[level] += lrecs;
+		cur->bc_ra[level] = 0;
+	} else if ((error = xfs_bmbt_increment(cur, level + 1, &i))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		goto error0;
+	}
+	if (level > 0)
+		cur->bc_ptrs[level]--;
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+	*stat = 2;
+	return 0;
+
+error0:
+	if (tcur)
+		xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR);
+	return error;
+}
+
+#ifdef DEBUG
+/*
+ * Get the data from the pointed-to record.
+ */
+int
+xfs_bmbt_get_rec(
+	xfs_btree_cur_t		*cur,
+	xfs_fileoff_t		*off,
+	xfs_fsblock_t		*bno,
+	xfs_filblks_t		*len,
+	xfs_exntst_t		*state,
+	int			*stat)
+{
+	xfs_bmbt_block_t	*block;
+	xfs_buf_t		*bp;
+#ifdef DEBUG
+	int			error;
+#endif
+	int			ptr;
+	xfs_bmbt_rec_t		*rp;
+
+	block = xfs_bmbt_get_block(cur, 0, &bp);
+	ptr = cur->bc_ptrs[0];
+#ifdef DEBUG
+	if ((error = xfs_btree_check_lblock(cur, block, 0, bp)))
+		return error;
+#endif
+	if (ptr > INT_GET(block->bb_numrecs, ARCH_CONVERT) || ptr <= 0) {
+		*stat = 0;
+		return 0;
+	}
+	rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
+	*off = xfs_bmbt_disk_get_startoff(rp);
+	*bno = xfs_bmbt_disk_get_startblock(rp);
+	*len = xfs_bmbt_disk_get_blockcount(rp);
+	*state = xfs_bmbt_disk_get_state(rp);
+	*stat = 1;
+	return 0;
+}
+#endif
+
+/*
+ * Insert one record/level.  Return information to the caller
+ * allowing the next level up to proceed if necessary.
+ */
+STATIC int					/* error */
+xfs_bmbt_insrec(
+	xfs_btree_cur_t		*cur,
+	int			level,
+	xfs_fsblock_t		*bnop,
+	xfs_bmbt_rec_t		*recp,
+	xfs_btree_cur_t		**curp,
+	int			*stat)		/* no-go/done/continue */
+{
+	xfs_bmbt_block_t	*block;		/* bmap btree block */
+	xfs_buf_t		*bp;		/* buffer for block */
+	int			error;		/* error return value */
+#ifdef XFS_BMBT_TRACE
+	static char		fname[] = "xfs_bmbt_insrec";
+#endif
+	int			i;		/* loop index */
+	xfs_bmbt_key_t		key;		/* bmap btree key */
+	xfs_bmbt_key_t		*kp=NULL;	/* pointer to bmap btree key */
+	int			logflags;	/* inode logging flags */
+	xfs_fsblock_t		nbno;		/* new block number */
+	struct xfs_btree_cur	*ncur;		/* new btree cursor */
+	xfs_bmbt_key_t		nkey;		/* new btree key value */
+	xfs_bmbt_rec_t		nrec;		/* new record count */
+	int			optr;		/* old key/record index */
+	xfs_bmbt_ptr_t		*pp;		/* pointer to bmap block addr */
+	int			ptr;		/* key/record index */
+	xfs_bmbt_rec_t		*rp=NULL;	/* pointer to bmap btree rec */
+	int			numrecs;
+
+	ASSERT(level < cur->bc_nlevels);
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	XFS_BMBT_TRACE_ARGIFR(cur, level, *bnop, recp);
+	ncur = (xfs_btree_cur_t *)0;
+	INT_SET(key.br_startoff, ARCH_CONVERT,
+		xfs_bmbt_disk_get_startoff(recp));
+	optr = ptr = cur->bc_ptrs[level];
+	if (ptr == 0) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	XFS_STATS_INC(xs_bmbt_insrec);
+	block = xfs_bmbt_get_block(cur, level, &bp);
+	numrecs = INT_GET(block->bb_numrecs, ARCH_CONVERT);
+#ifdef DEBUG
+	if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+	if (ptr <= numrecs) {
+		if (level == 0) {
+			rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
+			xfs_btree_check_rec(XFS_BTNUM_BMAP, recp, rp);
+		} else {
+			kp = XFS_BMAP_KEY_IADDR(block, ptr, cur);
+			xfs_btree_check_key(XFS_BTNUM_BMAP, &key, kp);
+		}
+	}
+#endif
+	nbno = NULLFSBLOCK;
+	if (numrecs == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
+		if (numrecs < XFS_BMAP_BLOCK_DMAXRECS(level, cur)) {
+			/*
+			 * A root block, that can be made bigger.
+			 */
+			xfs_iroot_realloc(cur->bc_private.b.ip, 1,
+				cur->bc_private.b.whichfork);
+			block = xfs_bmbt_get_block(cur, level, &bp);
+		} else if (level == cur->bc_nlevels - 1) {
+			if ((error = xfs_bmbt_newroot(cur, &logflags, stat)) ||
+			    *stat == 0) {
+				XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+				return error;
+			}
+			xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip,
+				logflags);
+			block = xfs_bmbt_get_block(cur, level, &bp);
+		} else {
+			if ((error = xfs_bmbt_rshift(cur, level, &i))) {
+				XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+				return error;
+			}
+			if (i) {
+				/* nothing */
+			} else {
+				if ((error = xfs_bmbt_lshift(cur, level, &i))) {
+					XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+					return error;
+				}
+				if (i) {
+					optr = ptr = cur->bc_ptrs[level];
+				} else {
+					if ((error = xfs_bmbt_split(cur, level,
+							&nbno, &nkey, &ncur,
+							&i))) {
+						XFS_BMBT_TRACE_CURSOR(cur,
+							ERROR);
+						return error;
+					}
+					if (i) {
+						block = xfs_bmbt_get_block(
+							    cur, level, &bp);
+#ifdef DEBUG
+						if ((error =
+						    xfs_btree_check_lblock(cur,
+							    block, level, bp))) {
+							XFS_BMBT_TRACE_CURSOR(
+								cur, ERROR);
+							return error;
+						}
+#endif
+						ptr = cur->bc_ptrs[level];
+						xfs_bmbt_disk_set_allf(&nrec,
+							nkey.br_startoff, 0, 0,
+							XFS_EXT_NORM);
+					} else {
+						XFS_BMBT_TRACE_CURSOR(cur,
+							EXIT);
+						*stat = 0;
+						return 0;
+					}
+				}
+			}
+		}
+	}
+	numrecs = INT_GET(block->bb_numrecs, ARCH_CONVERT);
+	if (level > 0) {
+		kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
+		pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
+#ifdef DEBUG
+		for (i = numrecs; i >= ptr; i--) {
+			if ((error = xfs_btree_check_lptr(cur, INT_GET(pp[i - 1], ARCH_CONVERT),
+					level))) {
+				XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+				return error;
+			}
+		}
+#endif
+		memmove(&kp[ptr], &kp[ptr - 1],
+			(numrecs - ptr + 1) * sizeof(*kp));
+		memmove(&pp[ptr], &pp[ptr - 1], /* INT_: direct copy */
+			(numrecs - ptr + 1) * sizeof(*pp));
+#ifdef DEBUG
+		if ((error = xfs_btree_check_lptr(cur, (xfs_bmbt_ptr_t)*bnop,
+				level))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+#endif
+		kp[ptr - 1] = key;
+		INT_SET(pp[ptr - 1], ARCH_CONVERT, *bnop);
+		numrecs++;
+		INT_SET(block->bb_numrecs, ARCH_CONVERT, numrecs);
+		xfs_bmbt_log_keys(cur, bp, ptr, numrecs);
+		xfs_bmbt_log_ptrs(cur, bp, ptr, numrecs);
+	} else {
+		rp = XFS_BMAP_REC_IADDR(block, 1, cur);
+		memmove(&rp[ptr], &rp[ptr - 1],
+			(numrecs - ptr + 1) * sizeof(*rp));
+		rp[ptr - 1] = *recp;
+		numrecs++;
+		INT_SET(block->bb_numrecs, ARCH_CONVERT, numrecs);
+		xfs_bmbt_log_recs(cur, bp, ptr, numrecs);
+	}
+	xfs_bmbt_log_block(cur, bp, XFS_BB_NUMRECS);
+#ifdef DEBUG
+	if (ptr < numrecs) {
+		if (level == 0)
+			xfs_btree_check_rec(XFS_BTNUM_BMAP, rp + ptr - 1,
+				rp + ptr);
+		else
+			xfs_btree_check_key(XFS_BTNUM_BMAP, kp + ptr - 1,
+				kp + ptr);
+	}
+#endif
+	if (optr == 1 && (error = xfs_bmbt_updkey(cur, &key, level + 1))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+	*bnop = nbno;
+	if (nbno != NULLFSBLOCK) {
+		*recp = nrec;
+		*curp = ncur;
+	}
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+	*stat = 1;
+	return 0;
+}
+
+STATIC int
+xfs_bmbt_killroot(
+	xfs_btree_cur_t		*cur)
+{
+	xfs_bmbt_block_t	*block;
+	xfs_bmbt_block_t	*cblock;
+	xfs_buf_t		*cbp;
+	xfs_bmbt_key_t		*ckp;
+	xfs_bmbt_ptr_t		*cpp;
+#ifdef DEBUG
+	int			error;
+#endif
+#ifdef XFS_BMBT_TRACE
+	static char		fname[] = "xfs_bmbt_killroot";
+#endif
+	int			i;
+	xfs_bmbt_key_t		*kp;
+	xfs_inode_t		*ip;
+	xfs_ifork_t		*ifp;
+	int			level;
+	xfs_bmbt_ptr_t		*pp;
+
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	level = cur->bc_nlevels - 1;
+	ASSERT(level >= 1);
+	/*
+	 * Don't deal with the root block needs to be a leaf case.
+	 * We're just going to turn the thing back into extents anyway.
+	 */
+	if (level == 1) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		return 0;
+	}
+	block = xfs_bmbt_get_block(cur, level, &cbp);
+	/*
+	 * Give up if the root has multiple children.
+	 */
+	if (INT_GET(block->bb_numrecs, ARCH_CONVERT) != 1) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		return 0;
+	}
+	/*
+	 * Only do this if the next level will fit.
+	 * Then the data must be copied up to the inode,
+	 * instead of freeing the root you free the next level.
+	 */
+	cbp = cur->bc_bufs[level - 1];
+	cblock = XFS_BUF_TO_BMBT_BLOCK(cbp);
+	if (INT_GET(cblock->bb_numrecs, ARCH_CONVERT) > XFS_BMAP_BLOCK_DMAXRECS(level, cur)) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		return 0;
+	}
+	ASSERT(INT_GET(cblock->bb_leftsib, ARCH_CONVERT) == NULLDFSBNO);
+	ASSERT(INT_GET(cblock->bb_rightsib, ARCH_CONVERT) == NULLDFSBNO);
+	ip = cur->bc_private.b.ip;
+	ifp = XFS_IFORK_PTR(ip, cur->bc_private.b.whichfork);
+	ASSERT(XFS_BMAP_BLOCK_IMAXRECS(level, cur) ==
+	       XFS_BMAP_BROOT_MAXRECS(ifp->if_broot_bytes));
+	i = (int)(INT_GET(cblock->bb_numrecs, ARCH_CONVERT) - XFS_BMAP_BLOCK_IMAXRECS(level, cur));
+	if (i) {
+		xfs_iroot_realloc(ip, i, cur->bc_private.b.whichfork);
+		block = ifp->if_broot;
+	}
+	INT_MOD(block->bb_numrecs, ARCH_CONVERT, i);
+	ASSERT(INT_GET(block->bb_numrecs, ARCH_CONVERT) == INT_GET(cblock->bb_numrecs, ARCH_CONVERT));
+	kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
+	ckp = XFS_BMAP_KEY_IADDR(cblock, 1, cur);
+	memcpy(kp, ckp, INT_GET(block->bb_numrecs, ARCH_CONVERT) * sizeof(*kp));
+	pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
+	cpp = XFS_BMAP_PTR_IADDR(cblock, 1, cur);
+#ifdef DEBUG
+	for (i = 0; i < INT_GET(cblock->bb_numrecs, ARCH_CONVERT); i++) {
+		if ((error = xfs_btree_check_lptr(cur, INT_GET(cpp[i], ARCH_CONVERT), level - 1))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+	}
+#endif
+	memcpy(pp, cpp, INT_GET(block->bb_numrecs, ARCH_CONVERT) * sizeof(*pp));
+	xfs_bmap_add_free(XFS_DADDR_TO_FSB(cur->bc_mp, XFS_BUF_ADDR(cbp)), 1,
+			cur->bc_private.b.flist, cur->bc_mp);
+	ip->i_d.di_nblocks--;
+	XFS_TRANS_MOD_DQUOT_BYINO(cur->bc_mp, cur->bc_tp, ip,
+			XFS_TRANS_DQ_BCOUNT, -1L);
+	xfs_trans_binval(cur->bc_tp, cbp);
+	cur->bc_bufs[level - 1] = NULL;
+	INT_MOD(block->bb_level, ARCH_CONVERT, -1);
+	xfs_trans_log_inode(cur->bc_tp, ip,
+		XFS_ILOG_CORE | XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
+	cur->bc_nlevels--;
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+	return 0;
+}
+
+/*
+ * Log key values from the btree block.
+ */
+STATIC void
+xfs_bmbt_log_keys(
+	xfs_btree_cur_t	*cur,
+	xfs_buf_t	*bp,
+	int		kfirst,
+	int		klast)
+{
+#ifdef XFS_BMBT_TRACE
+	static char	fname[] = "xfs_bmbt_log_keys";
+#endif
+	xfs_trans_t	*tp;
+
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	XFS_BMBT_TRACE_ARGBII(cur, bp, kfirst, klast);
+	tp = cur->bc_tp;
+	if (bp) {
+		xfs_bmbt_block_t	*block;
+		int			first;
+		xfs_bmbt_key_t		*kp;
+		int			last;
+
+		block = XFS_BUF_TO_BMBT_BLOCK(bp);
+		kp = XFS_BMAP_KEY_DADDR(block, 1, cur);
+		first = (int)((xfs_caddr_t)&kp[kfirst - 1] - (xfs_caddr_t)block);
+		last = (int)(((xfs_caddr_t)&kp[klast] - 1) - (xfs_caddr_t)block);
+		xfs_trans_log_buf(tp, bp, first, last);
+	} else {
+		xfs_inode_t		 *ip;
+
+		ip = cur->bc_private.b.ip;
+		xfs_trans_log_inode(tp, ip,
+			XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
+	}
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+}
+
+/*
+ * Log pointer values from the btree block.
+ */
+STATIC void
+xfs_bmbt_log_ptrs(
+	xfs_btree_cur_t	*cur,
+	xfs_buf_t	*bp,
+	int		pfirst,
+	int		plast)
+{
+#ifdef XFS_BMBT_TRACE
+	static char	fname[] = "xfs_bmbt_log_ptrs";
+#endif
+	xfs_trans_t	*tp;
+
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	XFS_BMBT_TRACE_ARGBII(cur, bp, pfirst, plast);
+	tp = cur->bc_tp;
+	if (bp) {
+		xfs_bmbt_block_t	*block;
+		int			first;
+		int			last;
+		xfs_bmbt_ptr_t		*pp;
+
+		block = XFS_BUF_TO_BMBT_BLOCK(bp);
+		pp = XFS_BMAP_PTR_DADDR(block, 1, cur);
+		first = (int)((xfs_caddr_t)&pp[pfirst - 1] - (xfs_caddr_t)block);
+		last = (int)(((xfs_caddr_t)&pp[plast] - 1) - (xfs_caddr_t)block);
+		xfs_trans_log_buf(tp, bp, first, last);
+	} else {
+		xfs_inode_t		*ip;
+
+		ip = cur->bc_private.b.ip;
+		xfs_trans_log_inode(tp, ip,
+			XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
+	}
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+}
+
+/*
+ * Lookup the record.  The cursor is made to point to it, based on dir.
+ */
+STATIC int				/* error */
+xfs_bmbt_lookup(
+	xfs_btree_cur_t		*cur,
+	xfs_lookup_t		dir,
+	int			*stat)		/* success/failure */
+{
+	xfs_bmbt_block_t	*block=NULL;
+	xfs_buf_t		*bp;
+	xfs_daddr_t		d;
+	xfs_sfiloff_t		diff;
+	int			error;		/* error return value */
+#ifdef XFS_BMBT_TRACE
+	static char	fname[] = "xfs_bmbt_lookup";
+#endif
+	xfs_fsblock_t		fsbno=0;
+	int			high;
+	int			i;
+	int			keyno=0;
+	xfs_bmbt_key_t		*kkbase=NULL;
+	xfs_bmbt_key_t		*kkp;
+	xfs_bmbt_rec_t		*krbase=NULL;
+	xfs_bmbt_rec_t		*krp;
+	int			level;
+	int			low;
+	xfs_mount_t		*mp;
+	xfs_bmbt_ptr_t		*pp;
+	xfs_bmbt_irec_t		*rp;
+	xfs_fileoff_t		startoff;
+	xfs_trans_t		*tp;
+
+	XFS_STATS_INC(xs_bmbt_lookup);
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	XFS_BMBT_TRACE_ARGI(cur, (int)dir);
+	tp = cur->bc_tp;
+	mp = cur->bc_mp;
+	rp = &cur->bc_rec.b;
+	for (level = cur->bc_nlevels - 1, diff = 1; level >= 0; level--) {
+		if (level < cur->bc_nlevels - 1) {
+			d = XFS_FSB_TO_DADDR(mp, fsbno);
+			bp = cur->bc_bufs[level];
+			if (bp && XFS_BUF_ADDR(bp) != d)
+				bp = (xfs_buf_t *)0;
+			if (!bp) {
+				if ((error = xfs_btree_read_bufl(mp, tp, fsbno,
+						0, &bp, XFS_BMAP_BTREE_REF))) {
+					XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+					return error;
+				}
+				xfs_btree_setbuf(cur, level, bp);
+				block = XFS_BUF_TO_BMBT_BLOCK(bp);
+				if ((error = xfs_btree_check_lblock(cur, block,
+						level, bp))) {
+					XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+					return error;
+				}
+			} else
+				block = XFS_BUF_TO_BMBT_BLOCK(bp);
+		} else
+			block = xfs_bmbt_get_block(cur, level, &bp);
+		if (diff == 0)
+			keyno = 1;
+		else {
+			if (level > 0)
+				kkbase = XFS_BMAP_KEY_IADDR(block, 1, cur);
+			else
+				krbase = XFS_BMAP_REC_IADDR(block, 1, cur);
+			low = 1;
+			if (!(high = INT_GET(block->bb_numrecs, ARCH_CONVERT))) {
+				ASSERT(level == 0);
+				cur->bc_ptrs[0] = dir != XFS_LOOKUP_LE;
+				XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+				*stat = 0;
+				return 0;
+			}
+			while (low <= high) {
+				XFS_STATS_INC(xs_bmbt_compare);
+				keyno = (low + high) >> 1;
+				if (level > 0) {
+					kkp = kkbase + keyno - 1;
+					startoff = INT_GET(kkp->br_startoff, ARCH_CONVERT);
+				} else {
+					krp = krbase + keyno - 1;
+					startoff = xfs_bmbt_disk_get_startoff(krp);
+				}
+				diff = (xfs_sfiloff_t)
+						(startoff - rp->br_startoff);
+				if (diff < 0)
+					low = keyno + 1;
+				else if (diff > 0)
+					high = keyno - 1;
+				else
+					break;
+			}
+		}
+		if (level > 0) {
+			if (diff > 0 && --keyno < 1)
+				keyno = 1;
+			pp = XFS_BMAP_PTR_IADDR(block, keyno, cur);
+#ifdef DEBUG
+			if ((error = xfs_btree_check_lptr(cur, INT_GET(*pp, ARCH_CONVERT), level))) {
+				XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+				return error;
+			}
+#endif
+			fsbno = INT_GET(*pp, ARCH_CONVERT);
+			cur->bc_ptrs[level] = keyno;
+		}
+	}
+	if (dir != XFS_LOOKUP_LE && diff < 0) {
+		keyno++;
+		/*
+		 * If ge search and we went off the end of the block, but it's
+		 * not the last block, we're in the wrong block.
+		 */
+		if (dir == XFS_LOOKUP_GE && keyno > INT_GET(block->bb_numrecs, ARCH_CONVERT) &&
+		    INT_GET(block->bb_rightsib, ARCH_CONVERT) != NULLDFSBNO) {
+			cur->bc_ptrs[0] = keyno;
+			if ((error = xfs_bmbt_increment(cur, 0, &i))) {
+				XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+				return error;
+			}
+			XFS_WANT_CORRUPTED_RETURN(i == 1);
+			XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+			*stat = 1;
+			return 0;
+		}
+	}
+	else if (dir == XFS_LOOKUP_LE && diff > 0)
+		keyno--;
+	cur->bc_ptrs[0] = keyno;
+	if (keyno == 0 || keyno > INT_GET(block->bb_numrecs, ARCH_CONVERT)) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+	} else {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = ((dir != XFS_LOOKUP_EQ) || (diff == 0));
+	}
+	return 0;
+}
+
+/*
+ * Move 1 record left from cur/level if possible.
+ * Update cur to reflect the new path.
+ */
+STATIC int					/* error */
+xfs_bmbt_lshift(
+	xfs_btree_cur_t		*cur,
+	int			level,
+	int			*stat)		/* success/failure */
+{
+	int			error;		/* error return value */
+#ifdef XFS_BMBT_TRACE
+	static char		fname[] = "xfs_bmbt_lshift";
+#endif
+#ifdef DEBUG
+	int			i;		/* loop counter */
+#endif
+	xfs_bmbt_key_t		key;		/* bmap btree key */
+	xfs_buf_t		*lbp;		/* left buffer pointer */
+	xfs_bmbt_block_t	*left;		/* left btree block */
+	xfs_bmbt_key_t		*lkp=NULL;	/* left btree key */
+	xfs_bmbt_ptr_t		*lpp;		/* left address pointer */
+	int			lrecs;		/* left record count */
+	xfs_bmbt_rec_t		*lrp=NULL;	/* left record pointer */
+	xfs_mount_t		*mp;		/* file system mount point */
+	xfs_buf_t		*rbp;		/* right buffer pointer */
+	xfs_bmbt_block_t	*right;		/* right btree block */
+	xfs_bmbt_key_t		*rkp=NULL;	/* right btree key */
+	xfs_bmbt_ptr_t		*rpp=NULL;	/* right address pointer */
+	xfs_bmbt_rec_t		*rrp=NULL;	/* right record pointer */
+	int			rrecs;		/* right record count */
+
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	XFS_BMBT_TRACE_ARGI(cur, level);
+	if (level == cur->bc_nlevels - 1) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	rbp = cur->bc_bufs[level];
+	right = XFS_BUF_TO_BMBT_BLOCK(rbp);
+#ifdef DEBUG
+	if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+#endif
+	if (INT_GET(right->bb_leftsib, ARCH_CONVERT) == NULLDFSBNO) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	if (cur->bc_ptrs[level] <= 1) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	mp = cur->bc_mp;
+	if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, INT_GET(right->bb_leftsib, ARCH_CONVERT), 0,
+			&lbp, XFS_BMAP_BTREE_REF))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+	left = XFS_BUF_TO_BMBT_BLOCK(lbp);
+	if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+	if (INT_GET(left->bb_numrecs, ARCH_CONVERT) == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	lrecs = INT_GET(left->bb_numrecs, ARCH_CONVERT) + 1;
+	if (level > 0) {
+		lkp = XFS_BMAP_KEY_IADDR(left, lrecs, cur);
+		rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
+		*lkp = *rkp;
+		xfs_bmbt_log_keys(cur, lbp, lrecs, lrecs);
+		lpp = XFS_BMAP_PTR_IADDR(left, lrecs, cur);
+		rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
+#ifdef DEBUG
+		if ((error = xfs_btree_check_lptr(cur, INT_GET(*rpp, ARCH_CONVERT), level))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+#endif
+		*lpp = *rpp; /* INT_: direct copy */
+		xfs_bmbt_log_ptrs(cur, lbp, lrecs, lrecs);
+	} else {
+		lrp = XFS_BMAP_REC_IADDR(left, lrecs, cur);
+		rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
+		*lrp = *rrp;
+		xfs_bmbt_log_recs(cur, lbp, lrecs, lrecs);
+	}
+	INT_SET(left->bb_numrecs, ARCH_CONVERT, lrecs);
+	xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS);
+#ifdef DEBUG
+	if (level > 0)
+		xfs_btree_check_key(XFS_BTNUM_BMAP, lkp - 1, lkp);
+	else
+		xfs_btree_check_rec(XFS_BTNUM_BMAP, lrp - 1, lrp);
+#endif
+	rrecs = INT_GET(right->bb_numrecs, ARCH_CONVERT) - 1;
+	INT_SET(right->bb_numrecs, ARCH_CONVERT, rrecs);
+	xfs_bmbt_log_block(cur, rbp, XFS_BB_NUMRECS);
+	if (level > 0) {
+#ifdef DEBUG
+		for (i = 0; i < rrecs; i++) {
+			if ((error = xfs_btree_check_lptr(cur, INT_GET(rpp[i + 1], ARCH_CONVERT),
+					level))) {
+				XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+				return error;
+			}
+		}
+#endif
+		memmove(rkp, rkp + 1, rrecs * sizeof(*rkp));
+		memmove(rpp, rpp + 1, rrecs * sizeof(*rpp));
+		xfs_bmbt_log_keys(cur, rbp, 1, rrecs);
+		xfs_bmbt_log_ptrs(cur, rbp, 1, rrecs);
+	} else {
+		memmove(rrp, rrp + 1, rrecs * sizeof(*rrp));
+		xfs_bmbt_log_recs(cur, rbp, 1, rrecs);
+		INT_SET(key.br_startoff, ARCH_CONVERT,
+			xfs_bmbt_disk_get_startoff(rrp));
+		rkp = &key;
+	}
+	if ((error = xfs_bmbt_updkey(cur, rkp, level + 1))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+	cur->bc_ptrs[level]--;
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+	*stat = 1;
+	return 0;
+}
+
+/*
+ * Move 1 record right from cur/level if possible.
+ * Update cur to reflect the new path.
+ */
+STATIC int					/* error */
+xfs_bmbt_rshift(
+	xfs_btree_cur_t		*cur,
+	int			level,
+	int			*stat)		/* success/failure */
+{
+	int			error;		/* error return value */
+#ifdef XFS_BMBT_TRACE
+	static char		fname[] = "xfs_bmbt_rshift";
+#endif
+	int			i;		/* loop counter */
+	xfs_bmbt_key_t		key;		/* bmap btree key */
+	xfs_buf_t		*lbp;		/* left buffer pointer */
+	xfs_bmbt_block_t	*left;		/* left btree block */
+	xfs_bmbt_key_t		*lkp;		/* left btree key */
+	xfs_bmbt_ptr_t		*lpp;		/* left address pointer */
+	xfs_bmbt_rec_t		*lrp;		/* left record pointer */
+	xfs_mount_t		*mp;		/* file system mount point */
+	xfs_buf_t		*rbp;		/* right buffer pointer */
+	xfs_bmbt_block_t	*right;		/* right btree block */
+	xfs_bmbt_key_t		*rkp;		/* right btree key */
+	xfs_bmbt_ptr_t		*rpp;		/* right address pointer */
+	xfs_bmbt_rec_t		*rrp=NULL;	/* right record pointer */
+	struct xfs_btree_cur	*tcur;		/* temporary btree cursor */
+
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	XFS_BMBT_TRACE_ARGI(cur, level);
+	if (level == cur->bc_nlevels - 1) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	lbp = cur->bc_bufs[level];
+	left = XFS_BUF_TO_BMBT_BLOCK(lbp);
+#ifdef DEBUG
+	if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+#endif
+	if (INT_GET(left->bb_rightsib, ARCH_CONVERT) == NULLDFSBNO) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	if (cur->bc_ptrs[level] >= INT_GET(left->bb_numrecs, ARCH_CONVERT)) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	mp = cur->bc_mp;
+	if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, INT_GET(left->bb_rightsib, ARCH_CONVERT), 0,
+			&rbp, XFS_BMAP_BTREE_REF))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+	right = XFS_BUF_TO_BMBT_BLOCK(rbp);
+	if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+	if (INT_GET(right->bb_numrecs, ARCH_CONVERT) == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	if (level > 0) {
+		lkp = XFS_BMAP_KEY_IADDR(left, INT_GET(left->bb_numrecs, ARCH_CONVERT), cur);
+		lpp = XFS_BMAP_PTR_IADDR(left, INT_GET(left->bb_numrecs, ARCH_CONVERT), cur);
+		rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
+		rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
+#ifdef DEBUG
+		for (i = INT_GET(right->bb_numrecs, ARCH_CONVERT) - 1; i >= 0; i--) {
+			if ((error = xfs_btree_check_lptr(cur, INT_GET(rpp[i], ARCH_CONVERT), level))) {
+				XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+				return error;
+			}
+		}
+#endif
+		memmove(rkp + 1, rkp, INT_GET(right->bb_numrecs, ARCH_CONVERT) * sizeof(*rkp));
+		memmove(rpp + 1, rpp, INT_GET(right->bb_numrecs, ARCH_CONVERT) * sizeof(*rpp));
+#ifdef DEBUG
+		if ((error = xfs_btree_check_lptr(cur, INT_GET(*lpp, ARCH_CONVERT), level))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+#endif
+		*rkp = *lkp;
+		*rpp = *lpp; /* INT_: direct copy */
+		xfs_bmbt_log_keys(cur, rbp, 1, INT_GET(right->bb_numrecs, ARCH_CONVERT) + 1);
+		xfs_bmbt_log_ptrs(cur, rbp, 1, INT_GET(right->bb_numrecs, ARCH_CONVERT) + 1);
+	} else {
+		lrp = XFS_BMAP_REC_IADDR(left, INT_GET(left->bb_numrecs, ARCH_CONVERT), cur);
+		rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
+		memmove(rrp + 1, rrp, INT_GET(right->bb_numrecs, ARCH_CONVERT) * sizeof(*rrp));
+		*rrp = *lrp;
+		xfs_bmbt_log_recs(cur, rbp, 1, INT_GET(right->bb_numrecs, ARCH_CONVERT) + 1);
+		INT_SET(key.br_startoff, ARCH_CONVERT,
+			xfs_bmbt_disk_get_startoff(rrp));
+		rkp = &key;
+	}
+	INT_MOD(left->bb_numrecs, ARCH_CONVERT, -1);
+	xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS);
+	INT_MOD(right->bb_numrecs, ARCH_CONVERT, +1);
+#ifdef DEBUG
+	if (level > 0)
+		xfs_btree_check_key(XFS_BTNUM_BMAP, rkp, rkp + 1);
+	else
+		xfs_btree_check_rec(XFS_BTNUM_BMAP, rrp, rrp + 1);
+#endif
+	xfs_bmbt_log_block(cur, rbp, XFS_BB_NUMRECS);
+	if ((error = xfs_btree_dup_cursor(cur, &tcur))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+	i = xfs_btree_lastrec(tcur, level);
+	XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
+	if ((error = xfs_bmbt_increment(tcur, level, &i))) {
+		XFS_BMBT_TRACE_CURSOR(tcur, ERROR);
+		goto error1;
+	}
+	XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
+	if ((error = xfs_bmbt_updkey(tcur, rkp, level + 1))) {
+		XFS_BMBT_TRACE_CURSOR(tcur, ERROR);
+		goto error1;
+	}
+	xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+	*stat = 1;
+	return 0;
+error0:
+	XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+error1:
+	xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR);
+	return error;
+}
+
+/*
+ * Determine the extent state.
+ */
+/* ARGSUSED */
+STATIC xfs_exntst_t
+xfs_extent_state(
+	xfs_filblks_t		blks,
+	int			extent_flag)
+{
+	if (extent_flag) {
+		ASSERT(blks != 0);	/* saved for DMIG */
+		return XFS_EXT_UNWRITTEN;
+	}
+	return XFS_EXT_NORM;
+}
+
+
+/*
+ * Split cur/level block in half.
+ * Return new block number and its first record (to be inserted into parent).
+ */
+STATIC int					/* error */
+xfs_bmbt_split(
+	xfs_btree_cur_t		*cur,
+	int			level,
+	xfs_fsblock_t		*bnop,
+	xfs_bmbt_key_t		*keyp,
+	xfs_btree_cur_t		**curp,
+	int			*stat)		/* success/failure */
+{
+	xfs_alloc_arg_t		args;		/* block allocation args */
+	int			error;		/* error return value */
+#ifdef XFS_BMBT_TRACE
+	static char		fname[] = "xfs_bmbt_split";
+#endif
+	int			i;		/* loop counter */
+	xfs_fsblock_t		lbno;		/* left sibling block number */
+	xfs_buf_t		*lbp;		/* left buffer pointer */
+	xfs_bmbt_block_t	*left;		/* left btree block */
+	xfs_bmbt_key_t		*lkp;		/* left btree key */
+	xfs_bmbt_ptr_t		*lpp;		/* left address pointer */
+	xfs_bmbt_rec_t		*lrp;		/* left record pointer */
+	xfs_buf_t		*rbp;		/* right buffer pointer */
+	xfs_bmbt_block_t	*right;		/* right btree block */
+	xfs_bmbt_key_t		*rkp;		/* right btree key */
+	xfs_bmbt_ptr_t		*rpp;		/* right address pointer */
+	xfs_bmbt_block_t	*rrblock;	/* right-right btree block */
+	xfs_buf_t		*rrbp;		/* right-right buffer pointer */
+	xfs_bmbt_rec_t		*rrp;		/* right record pointer */
+
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	XFS_BMBT_TRACE_ARGIFK(cur, level, *bnop, keyp);
+	args.tp = cur->bc_tp;
+	args.mp = cur->bc_mp;
+	lbp = cur->bc_bufs[level];
+	lbno = XFS_DADDR_TO_FSB(args.mp, XFS_BUF_ADDR(lbp));
+	left = XFS_BUF_TO_BMBT_BLOCK(lbp);
+	args.fsbno = cur->bc_private.b.firstblock;
+	if (args.fsbno == NULLFSBLOCK) {
+		args.fsbno = lbno;
+		args.type = XFS_ALLOCTYPE_START_BNO;
+	} else if (cur->bc_private.b.flist->xbf_low)
+		args.type = XFS_ALLOCTYPE_FIRST_AG;
+	else
+		args.type = XFS_ALLOCTYPE_NEAR_BNO;
+	args.mod = args.minleft = args.alignment = args.total = args.isfl =
+		args.userdata = args.minalignslop = 0;
+	args.minlen = args.maxlen = args.prod = 1;
+	args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
+	if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return XFS_ERROR(ENOSPC);
+	}
+	if ((error = xfs_alloc_vextent(&args))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+	if (args.fsbno == NULLFSBLOCK) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	ASSERT(args.len == 1);
+	cur->bc_private.b.firstblock = args.fsbno;
+	cur->bc_private.b.allocated++;
+	cur->bc_private.b.ip->i_d.di_nblocks++;
+	xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE);
+	XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip,
+			XFS_TRANS_DQ_BCOUNT, 1L);
+	rbp = xfs_btree_get_bufl(args.mp, args.tp, args.fsbno, 0);
+	right = XFS_BUF_TO_BMBT_BLOCK(rbp);
+#ifdef DEBUG
+	if ((error = xfs_btree_check_lblock(cur, left, level, rbp))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+#endif
+	INT_SET(right->bb_magic, ARCH_CONVERT, XFS_BMAP_MAGIC);
+	right->bb_level = left->bb_level; /* INT_: direct copy */
+	INT_SET(right->bb_numrecs, ARCH_CONVERT, (__uint16_t)(INT_GET(left->bb_numrecs, ARCH_CONVERT) / 2));
+	if ((INT_GET(left->bb_numrecs, ARCH_CONVERT) & 1) &&
+	    cur->bc_ptrs[level] <= INT_GET(right->bb_numrecs, ARCH_CONVERT) + 1)
+		INT_MOD(right->bb_numrecs, ARCH_CONVERT, +1);
+	i = INT_GET(left->bb_numrecs, ARCH_CONVERT) - INT_GET(right->bb_numrecs, ARCH_CONVERT) + 1;
+	if (level > 0) {
+		lkp = XFS_BMAP_KEY_IADDR(left, i, cur);
+		lpp = XFS_BMAP_PTR_IADDR(left, i, cur);
+		rkp = XFS_BMAP_KEY_IADDR(right, 1, cur);
+		rpp = XFS_BMAP_PTR_IADDR(right, 1, cur);
+#ifdef DEBUG
+		for (i = 0; i < INT_GET(right->bb_numrecs, ARCH_CONVERT); i++) {
+			if ((error = xfs_btree_check_lptr(cur, INT_GET(lpp[i], ARCH_CONVERT), level))) {
+				XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+				return error;
+			}
+		}
+#endif
+		memcpy(rkp, lkp, INT_GET(right->bb_numrecs, ARCH_CONVERT) * sizeof(*rkp));
+		memcpy(rpp, lpp, INT_GET(right->bb_numrecs, ARCH_CONVERT) * sizeof(*rpp));
+		xfs_bmbt_log_keys(cur, rbp, 1, INT_GET(right->bb_numrecs, ARCH_CONVERT));
+		xfs_bmbt_log_ptrs(cur, rbp, 1, INT_GET(right->bb_numrecs, ARCH_CONVERT));
+		keyp->br_startoff = INT_GET(rkp->br_startoff, ARCH_CONVERT);
+	} else {
+		lrp = XFS_BMAP_REC_IADDR(left, i, cur);
+		rrp = XFS_BMAP_REC_IADDR(right, 1, cur);
+		memcpy(rrp, lrp, INT_GET(right->bb_numrecs, ARCH_CONVERT) * sizeof(*rrp));
+		xfs_bmbt_log_recs(cur, rbp, 1, INT_GET(right->bb_numrecs, ARCH_CONVERT));
+		keyp->br_startoff = xfs_bmbt_disk_get_startoff(rrp);
+	}
+	INT_MOD(left->bb_numrecs, ARCH_CONVERT, -(INT_GET(right->bb_numrecs, ARCH_CONVERT)));
+	right->bb_rightsib = left->bb_rightsib; /* INT_: direct copy */
+	INT_SET(left->bb_rightsib, ARCH_CONVERT, args.fsbno);
+	INT_SET(right->bb_leftsib, ARCH_CONVERT, lbno);
+	xfs_bmbt_log_block(cur, rbp, XFS_BB_ALL_BITS);
+	xfs_bmbt_log_block(cur, lbp, XFS_BB_NUMRECS | XFS_BB_RIGHTSIB);
+	if (INT_GET(right->bb_rightsib, ARCH_CONVERT) != NULLDFSBNO) {
+		if ((error = xfs_btree_read_bufl(args.mp, args.tp,
+				INT_GET(right->bb_rightsib, ARCH_CONVERT), 0, &rrbp,
+				XFS_BMAP_BTREE_REF))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+		rrblock = XFS_BUF_TO_BMBT_BLOCK(rrbp);
+		if ((error = xfs_btree_check_lblock(cur, rrblock, level, rrbp))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+		INT_SET(rrblock->bb_leftsib, ARCH_CONVERT, args.fsbno);
+		xfs_bmbt_log_block(cur, rrbp, XFS_BB_LEFTSIB);
+	}
+	if (cur->bc_ptrs[level] > INT_GET(left->bb_numrecs, ARCH_CONVERT) + 1) {
+		xfs_btree_setbuf(cur, level, rbp);
+		cur->bc_ptrs[level] -= INT_GET(left->bb_numrecs, ARCH_CONVERT);
+	}
+	if (level + 1 < cur->bc_nlevels) {
+		if ((error = xfs_btree_dup_cursor(cur, curp))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+		(*curp)->bc_ptrs[level + 1]++;
+	}
+	*bnop = args.fsbno;
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+	*stat = 1;
+	return 0;
+}
+
+
+/*
+ * Update keys for the record.
+ */
+STATIC int
+xfs_bmbt_updkey(
+	xfs_btree_cur_t		*cur,
+	xfs_bmbt_key_t		*keyp,	/* on-disk format */
+	int			level)
+{
+	xfs_bmbt_block_t	*block;
+	xfs_buf_t		*bp;
+#ifdef DEBUG
+	int			error;
+#endif
+#ifdef XFS_BMBT_TRACE
+	static char		fname[] = "xfs_bmbt_updkey";
+#endif
+	xfs_bmbt_key_t		*kp;
+	int			ptr;
+
+	ASSERT(level >= 1);
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	XFS_BMBT_TRACE_ARGIK(cur, level, keyp);
+	for (ptr = 1; ptr == 1 && level < cur->bc_nlevels; level++) {
+		block = xfs_bmbt_get_block(cur, level, &bp);
+#ifdef DEBUG
+		if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+#endif
+		ptr = cur->bc_ptrs[level];
+		kp = XFS_BMAP_KEY_IADDR(block, ptr, cur);
+		*kp = *keyp;
+		xfs_bmbt_log_keys(cur, bp, ptr, ptr);
+	}
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+	return 0;
+}
+
+/*
+ * Convert on-disk form of btree root to in-memory form.
+ */
+void
+xfs_bmdr_to_bmbt(
+	xfs_bmdr_block_t	*dblock,
+	int			dblocklen,
+	xfs_bmbt_block_t	*rblock,
+	int			rblocklen)
+{
+	int			dmxr;
+	xfs_bmbt_key_t		*fkp;
+	xfs_bmbt_ptr_t		*fpp;
+	xfs_bmbt_key_t		*tkp;
+	xfs_bmbt_ptr_t		*tpp;
+
+	INT_SET(rblock->bb_magic, ARCH_CONVERT, XFS_BMAP_MAGIC);
+	rblock->bb_level = dblock->bb_level;	/* both in on-disk format */
+	ASSERT(INT_GET(rblock->bb_level, ARCH_CONVERT) > 0);
+	rblock->bb_numrecs = dblock->bb_numrecs;/* both in on-disk format */
+	INT_SET(rblock->bb_leftsib, ARCH_CONVERT, NULLDFSBNO);
+	INT_SET(rblock->bb_rightsib, ARCH_CONVERT, NULLDFSBNO);
+	dmxr = (int)XFS_BTREE_BLOCK_MAXRECS(dblocklen, xfs_bmdr, 0);
+	fkp = XFS_BTREE_KEY_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
+	tkp = XFS_BMAP_BROOT_KEY_ADDR(rblock, 1, rblocklen);
+	fpp = XFS_BTREE_PTR_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
+	tpp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, rblocklen);
+	dmxr = INT_GET(dblock->bb_numrecs, ARCH_CONVERT);
+	memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
+	memcpy(tpp, fpp, sizeof(*fpp) * dmxr); /* INT_: direct copy */
+}
+
+/*
+ * Decrement cursor by one record at the level.
+ * For nonzero levels the leaf-ward information is untouched.
+ */
+int						/* error */
+xfs_bmbt_decrement(
+	xfs_btree_cur_t		*cur,
+	int			level,
+	int			*stat)		/* success/failure */
+{
+	xfs_bmbt_block_t	*block;
+	xfs_buf_t		*bp;
+	int			error;		/* error return value */
+#ifdef XFS_BMBT_TRACE
+	static char		fname[] = "xfs_bmbt_decrement";
+#endif
+	xfs_fsblock_t		fsbno;
+	int			lev;
+	xfs_mount_t		*mp;
+	xfs_trans_t		*tp;
+
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	XFS_BMBT_TRACE_ARGI(cur, level);
+	ASSERT(level < cur->bc_nlevels);
+	if (level < cur->bc_nlevels - 1)
+		xfs_btree_readahead(cur, level, XFS_BTCUR_LEFTRA);
+	if (--cur->bc_ptrs[level] > 0) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 1;
+		return 0;
+	}
+	block = xfs_bmbt_get_block(cur, level, &bp);
+#ifdef DEBUG
+	if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+#endif
+	if (INT_GET(block->bb_leftsib, ARCH_CONVERT) == NULLDFSBNO) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
+		if (--cur->bc_ptrs[lev] > 0)
+			break;
+		if (lev < cur->bc_nlevels - 1)
+			xfs_btree_readahead(cur, lev, XFS_BTCUR_LEFTRA);
+	}
+	if (lev == cur->bc_nlevels) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	tp = cur->bc_tp;
+	mp = cur->bc_mp;
+	for (block = xfs_bmbt_get_block(cur, lev, &bp); lev > level; ) {
+		fsbno = INT_GET(*XFS_BMAP_PTR_IADDR(block, cur->bc_ptrs[lev], cur), ARCH_CONVERT);
+		if ((error = xfs_btree_read_bufl(mp, tp, fsbno, 0, &bp,
+				XFS_BMAP_BTREE_REF))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+		lev--;
+		xfs_btree_setbuf(cur, lev, bp);
+		block = XFS_BUF_TO_BMBT_BLOCK(bp);
+		if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+		cur->bc_ptrs[lev] = INT_GET(block->bb_numrecs, ARCH_CONVERT);
+	}
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+	*stat = 1;
+	return 0;
+}
+
+/*
+ * Delete the record pointed to by cur.
+ */
+int					/* error */
+xfs_bmbt_delete(
+	xfs_btree_cur_t	*cur,
+	int		*stat)		/* success/failure */
+{
+	int		error;		/* error return value */
+#ifdef XFS_BMBT_TRACE
+	static char	fname[] = "xfs_bmbt_delete";
+#endif
+	int		i;
+	int		level;
+
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	for (level = 0, i = 2; i == 2; level++) {
+		if ((error = xfs_bmbt_delrec(cur, level, &i))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+	}
+	if (i == 0) {
+		for (level = 1; level < cur->bc_nlevels; level++) {
+			if (cur->bc_ptrs[level] == 0) {
+				if ((error = xfs_bmbt_decrement(cur, level,
+						&i))) {
+					XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+					return error;
+				}
+				break;
+			}
+		}
+	}
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+	*stat = i;
+	return 0;
+}
+
+/*
+ * Convert a compressed bmap extent record to an uncompressed form.
+ * This code must be in sync with the routines xfs_bmbt_get_startoff,
+ * xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state.
+ */
+
+STATIC __inline__ void
+__xfs_bmbt_get_all(
+		__uint64_t l0,
+		__uint64_t l1,
+		xfs_bmbt_irec_t *s)
+{
+	int	ext_flag;
+	xfs_exntst_t st;
+
+	ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN));
+	s->br_startoff = ((xfs_fileoff_t)l0 &
+			   XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
+#if XFS_BIG_BLKNOS
+	s->br_startblock = (((xfs_fsblock_t)l0 & XFS_MASK64LO(9)) << 43) |
+			   (((xfs_fsblock_t)l1) >> 21);
+#else
+#ifdef DEBUG
+	{
+		xfs_dfsbno_t	b;
+
+		b = (((xfs_dfsbno_t)l0 & XFS_MASK64LO(9)) << 43) |
+		    (((xfs_dfsbno_t)l1) >> 21);
+		ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
+		s->br_startblock = (xfs_fsblock_t)b;
+	}
+#else	/* !DEBUG */
+	s->br_startblock = (xfs_fsblock_t)(((xfs_dfsbno_t)l1) >> 21);
+#endif	/* DEBUG */
+#endif	/* XFS_BIG_BLKNOS */
+	s->br_blockcount = (xfs_filblks_t)(l1 & XFS_MASK64LO(21));
+	/* This is xfs_extent_state() in-line */
+	if (ext_flag) {
+		ASSERT(s->br_blockcount != 0);	/* saved for DMIG */
+		st = XFS_EXT_UNWRITTEN;
+	} else
+		st = XFS_EXT_NORM;
+	s->br_state = st;
+}
+
+void
+xfs_bmbt_get_all(
+	xfs_bmbt_rec_t	*r,
+	xfs_bmbt_irec_t *s)
+{
+	__xfs_bmbt_get_all(r->l0, r->l1, s);
+}
+
+/*
+ * Get the block pointer for the given level of the cursor.
+ * Fill in the buffer pointer, if applicable.
+ */
+xfs_bmbt_block_t *
+xfs_bmbt_get_block(
+	xfs_btree_cur_t		*cur,
+	int			level,
+	xfs_buf_t		**bpp)
+{
+	xfs_ifork_t		*ifp;
+	xfs_bmbt_block_t	*rval;
+
+	if (level < cur->bc_nlevels - 1) {
+		*bpp = cur->bc_bufs[level];
+		rval = XFS_BUF_TO_BMBT_BLOCK(*bpp);
+	} else {
+		*bpp = NULL;
+		ifp = XFS_IFORK_PTR(cur->bc_private.b.ip,
+			cur->bc_private.b.whichfork);
+		rval = ifp->if_broot;
+	}
+	return rval;
+}
+
+/*
+ * Extract the blockcount field from an in memory bmap extent record.
+ */
+xfs_filblks_t
+xfs_bmbt_get_blockcount(
+	xfs_bmbt_rec_t	*r)
+{
+	return (xfs_filblks_t)(r->l1 & XFS_MASK64LO(21));
+}
+
+/*
+ * Extract the startblock field from an in memory bmap extent record.
+ */
+xfs_fsblock_t
+xfs_bmbt_get_startblock(
+	xfs_bmbt_rec_t	*r)
+{
+#if XFS_BIG_BLKNOS
+	return (((xfs_fsblock_t)r->l0 & XFS_MASK64LO(9)) << 43) |
+	       (((xfs_fsblock_t)r->l1) >> 21);
+#else
+#ifdef DEBUG
+	xfs_dfsbno_t	b;
+
+	b = (((xfs_dfsbno_t)r->l0 & XFS_MASK64LO(9)) << 43) |
+	    (((xfs_dfsbno_t)r->l1) >> 21);
+	ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
+	return (xfs_fsblock_t)b;
+#else	/* !DEBUG */
+	return (xfs_fsblock_t)(((xfs_dfsbno_t)r->l1) >> 21);
+#endif	/* DEBUG */
+#endif	/* XFS_BIG_BLKNOS */
+}
+
+/*
+ * Extract the startoff field from an in memory bmap extent record.
+ */
+xfs_fileoff_t
+xfs_bmbt_get_startoff(
+	xfs_bmbt_rec_t	*r)
+{
+	return ((xfs_fileoff_t)r->l0 &
+		 XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
+}
+
+xfs_exntst_t
+xfs_bmbt_get_state(
+	xfs_bmbt_rec_t	*r)
+{
+	int	ext_flag;
+
+	ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN));
+	return xfs_extent_state(xfs_bmbt_get_blockcount(r),
+				ext_flag);
+}
+
+#if __BYTE_ORDER != __BIG_ENDIAN
+/* Endian flipping versions of the bmbt extraction functions */
+void
+xfs_bmbt_disk_get_all(
+	xfs_bmbt_rec_t	*r,
+	xfs_bmbt_irec_t *s)
+{
+	__uint64_t	l0, l1;
+
+	l0 = INT_GET(r->l0, ARCH_CONVERT);
+	l1 = INT_GET(r->l1, ARCH_CONVERT);
+
+	__xfs_bmbt_get_all(l0, l1, s);
+}
+
+/*
+ * Extract the blockcount field from an on disk bmap extent record.
+ */
+xfs_filblks_t
+xfs_bmbt_disk_get_blockcount(
+	xfs_bmbt_rec_t	*r)
+{
+	return (xfs_filblks_t)(INT_GET(r->l1, ARCH_CONVERT) & XFS_MASK64LO(21));
+}
+
+/*
+ * Extract the startblock field from an on disk bmap extent record.
+ */
+xfs_fsblock_t
+xfs_bmbt_disk_get_startblock(
+	xfs_bmbt_rec_t	*r)
+{
+#if XFS_BIG_BLKNOS
+	return (((xfs_fsblock_t)INT_GET(r->l0, ARCH_CONVERT) & XFS_MASK64LO(9)) << 43) |
+	       (((xfs_fsblock_t)INT_GET(r->l1, ARCH_CONVERT)) >> 21);
+#else
+#ifdef DEBUG
+	xfs_dfsbno_t	b;
+
+	b = (((xfs_dfsbno_t)INT_GET(r->l0, ARCH_CONVERT) & XFS_MASK64LO(9)) << 43) |
+	    (((xfs_dfsbno_t)INT_GET(r->l1, ARCH_CONVERT)) >> 21);
+	ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b));
+	return (xfs_fsblock_t)b;
+#else	/* !DEBUG */
+	return (xfs_fsblock_t)(((xfs_dfsbno_t)INT_GET(r->l1, ARCH_CONVERT)) >> 21);
+#endif	/* DEBUG */
+#endif	/* XFS_BIG_BLKNOS */
+}
+
+/*
+ * Extract the startoff field from a disk format bmap extent record.
+ */
+xfs_fileoff_t
+xfs_bmbt_disk_get_startoff(
+	xfs_bmbt_rec_t	*r)
+{
+	return ((xfs_fileoff_t)INT_GET(r->l0, ARCH_CONVERT) &
+		 XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
+}
+
+xfs_exntst_t
+xfs_bmbt_disk_get_state(
+	xfs_bmbt_rec_t  *r)
+{
+	int	ext_flag;
+
+	ext_flag = (int)((INT_GET(r->l0, ARCH_CONVERT)) >> (64 - BMBT_EXNTFLAG_BITLEN));
+	return xfs_extent_state(xfs_bmbt_disk_get_blockcount(r),
+				ext_flag);
+}
+#endif
+
+
+/*
+ * Increment cursor by one record at the level.
+ * For nonzero levels the leaf-ward information is untouched.
+ */
+int						/* error */
+xfs_bmbt_increment(
+	xfs_btree_cur_t		*cur,
+	int			level,
+	int			*stat)		/* success/failure */
+{
+	xfs_bmbt_block_t	*block;
+	xfs_buf_t		*bp;
+	int			error;		/* error return value */
+#ifdef XFS_BMBT_TRACE
+	static char		fname[] = "xfs_bmbt_increment";
+#endif
+	xfs_fsblock_t		fsbno;
+	int			lev;
+	xfs_mount_t		*mp;
+	xfs_trans_t		*tp;
+
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	XFS_BMBT_TRACE_ARGI(cur, level);
+	ASSERT(level < cur->bc_nlevels);
+	if (level < cur->bc_nlevels - 1)
+		xfs_btree_readahead(cur, level, XFS_BTCUR_RIGHTRA);
+	block = xfs_bmbt_get_block(cur, level, &bp);
+#ifdef DEBUG
+	if ((error = xfs_btree_check_lblock(cur, block, level, bp))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+#endif
+	if (++cur->bc_ptrs[level] <= INT_GET(block->bb_numrecs, ARCH_CONVERT)) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 1;
+		return 0;
+	}
+	if (INT_GET(block->bb_rightsib, ARCH_CONVERT) == NULLDFSBNO) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
+		block = xfs_bmbt_get_block(cur, lev, &bp);
+#ifdef DEBUG
+		if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+#endif
+		if (++cur->bc_ptrs[lev] <= INT_GET(block->bb_numrecs, ARCH_CONVERT))
+			break;
+		if (lev < cur->bc_nlevels - 1)
+			xfs_btree_readahead(cur, lev, XFS_BTCUR_RIGHTRA);
+	}
+	if (lev == cur->bc_nlevels) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	tp = cur->bc_tp;
+	mp = cur->bc_mp;
+	for (block = xfs_bmbt_get_block(cur, lev, &bp); lev > level; ) {
+		fsbno = INT_GET(*XFS_BMAP_PTR_IADDR(block, cur->bc_ptrs[lev], cur), ARCH_CONVERT);
+		if ((error = xfs_btree_read_bufl(mp, tp, fsbno, 0, &bp,
+				XFS_BMAP_BTREE_REF))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+		lev--;
+		xfs_btree_setbuf(cur, lev, bp);
+		block = XFS_BUF_TO_BMBT_BLOCK(bp);
+		if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+		cur->bc_ptrs[lev] = 1;
+	}
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+	*stat = 1;
+	return 0;
+}
+
+/*
+ * Insert the current record at the point referenced by cur.
+ */
+int					/* error */
+xfs_bmbt_insert(
+	xfs_btree_cur_t	*cur,
+	int		*stat)		/* success/failure */
+{
+	int		error;		/* error return value */
+#ifdef XFS_BMBT_TRACE
+	static char	fname[] = "xfs_bmbt_insert";
+#endif
+	int		i;
+	int		level;
+	xfs_fsblock_t	nbno;
+	xfs_btree_cur_t	*ncur;
+	xfs_bmbt_rec_t	nrec;
+	xfs_btree_cur_t	*pcur;
+
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	level = 0;
+	nbno = NULLFSBLOCK;
+	xfs_bmbt_disk_set_all(&nrec, &cur->bc_rec.b);
+	ncur = (xfs_btree_cur_t *)0;
+	pcur = cur;
+	do {
+		if ((error = xfs_bmbt_insrec(pcur, level++, &nbno, &nrec, &ncur,
+				&i))) {
+			if (pcur != cur)
+				xfs_btree_del_cursor(pcur, XFS_BTREE_ERROR);
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+		XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
+		if (pcur != cur && (ncur || nbno == NULLFSBLOCK)) {
+			cur->bc_nlevels = pcur->bc_nlevels;
+			cur->bc_private.b.allocated +=
+				pcur->bc_private.b.allocated;
+			pcur->bc_private.b.allocated = 0;
+			ASSERT((cur->bc_private.b.firstblock != NULLFSBLOCK) ||
+			       (cur->bc_private.b.ip->i_d.di_flags &
+				XFS_DIFLAG_REALTIME));
+			cur->bc_private.b.firstblock =
+				pcur->bc_private.b.firstblock;
+			ASSERT(cur->bc_private.b.flist ==
+			       pcur->bc_private.b.flist);
+			xfs_btree_del_cursor(pcur, XFS_BTREE_NOERROR);
+		}
+		if (ncur) {
+			pcur = ncur;
+			ncur = (xfs_btree_cur_t *)0;
+		}
+	} while (nbno != NULLFSBLOCK);
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+	*stat = i;
+	return 0;
+error0:
+	XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+	return error;
+}
+
+/*
+ * Log fields from the btree block header.
+ */
+void
+xfs_bmbt_log_block(
+	xfs_btree_cur_t		*cur,
+	xfs_buf_t		*bp,
+	int			fields)
+{
+	int			first;
+#ifdef XFS_BMBT_TRACE
+	static char		fname[] = "xfs_bmbt_log_block";
+#endif
+	int			last;
+	xfs_trans_t		*tp;
+	static const short	offsets[] = {
+		offsetof(xfs_bmbt_block_t, bb_magic),
+		offsetof(xfs_bmbt_block_t, bb_level),
+		offsetof(xfs_bmbt_block_t, bb_numrecs),
+		offsetof(xfs_bmbt_block_t, bb_leftsib),
+		offsetof(xfs_bmbt_block_t, bb_rightsib),
+		sizeof(xfs_bmbt_block_t)
+	};
+
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	XFS_BMBT_TRACE_ARGBI(cur, bp, fields);
+	tp = cur->bc_tp;
+	if (bp) {
+		xfs_btree_offsets(fields, offsets, XFS_BB_NUM_BITS, &first,
+				  &last);
+		xfs_trans_log_buf(tp, bp, first, last);
+	} else
+		xfs_trans_log_inode(tp, cur->bc_private.b.ip,
+			XFS_ILOG_FBROOT(cur->bc_private.b.whichfork));
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+}
+
+/*
+ * Log record values from the btree block.
+ */
+void
+xfs_bmbt_log_recs(
+	xfs_btree_cur_t		*cur,
+	xfs_buf_t		*bp,
+	int			rfirst,
+	int			rlast)
+{
+	xfs_bmbt_block_t	*block;
+	int			first;
+#ifdef XFS_BMBT_TRACE
+	static char		fname[] = "xfs_bmbt_log_recs";
+#endif
+	int			last;
+	xfs_bmbt_rec_t		*rp;
+	xfs_trans_t		*tp;
+
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	XFS_BMBT_TRACE_ARGBII(cur, bp, rfirst, rlast);
+	ASSERT(bp);
+	tp = cur->bc_tp;
+	block = XFS_BUF_TO_BMBT_BLOCK(bp);
+	rp = XFS_BMAP_REC_DADDR(block, 1, cur);
+	first = (int)((xfs_caddr_t)&rp[rfirst - 1] - (xfs_caddr_t)block);
+	last = (int)(((xfs_caddr_t)&rp[rlast] - 1) - (xfs_caddr_t)block);
+	xfs_trans_log_buf(tp, bp, first, last);
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+}
+
+int					/* error */
+xfs_bmbt_lookup_eq(
+	xfs_btree_cur_t	*cur,
+	xfs_fileoff_t	off,
+	xfs_fsblock_t	bno,
+	xfs_filblks_t	len,
+	int		*stat)		/* success/failure */
+{
+	cur->bc_rec.b.br_startoff = off;
+	cur->bc_rec.b.br_startblock = bno;
+	cur->bc_rec.b.br_blockcount = len;
+	return xfs_bmbt_lookup(cur, XFS_LOOKUP_EQ, stat);
+}
+
+int					/* error */
+xfs_bmbt_lookup_ge(
+	xfs_btree_cur_t	*cur,
+	xfs_fileoff_t	off,
+	xfs_fsblock_t	bno,
+	xfs_filblks_t	len,
+	int		*stat)		/* success/failure */
+{
+	cur->bc_rec.b.br_startoff = off;
+	cur->bc_rec.b.br_startblock = bno;
+	cur->bc_rec.b.br_blockcount = len;
+	return xfs_bmbt_lookup(cur, XFS_LOOKUP_GE, stat);
+}
+
+int					/* error */
+xfs_bmbt_lookup_le(
+	xfs_btree_cur_t	*cur,
+	xfs_fileoff_t	off,
+	xfs_fsblock_t	bno,
+	xfs_filblks_t	len,
+	int		*stat)		/* success/failure */
+{
+	cur->bc_rec.b.br_startoff = off;
+	cur->bc_rec.b.br_startblock = bno;
+	cur->bc_rec.b.br_blockcount = len;
+	return xfs_bmbt_lookup(cur, XFS_LOOKUP_LE, stat);
+}
+
+/*
+ * Give the bmap btree a new root block.  Copy the old broot contents
+ * down into a real block and make the broot point to it.
+ */
+int						/* error */
+xfs_bmbt_newroot(
+	xfs_btree_cur_t		*cur,		/* btree cursor */
+	int			*logflags,	/* logging flags for inode */
+	int			*stat)		/* return status - 0 fail */
+{
+	xfs_alloc_arg_t		args;		/* allocation arguments */
+	xfs_bmbt_block_t	*block;		/* bmap btree block */
+	xfs_buf_t		*bp;		/* buffer for block */
+	xfs_bmbt_block_t	*cblock;	/* child btree block */
+	xfs_bmbt_key_t		*ckp;		/* child key pointer */
+	xfs_bmbt_ptr_t		*cpp;		/* child ptr pointer */
+	int			error;		/* error return code */
+#ifdef XFS_BMBT_TRACE
+	static char		fname[] = "xfs_bmbt_newroot";
+#endif
+#ifdef DEBUG
+	int			i;		/* loop counter */
+#endif
+	xfs_bmbt_key_t		*kp;		/* pointer to bmap btree key */
+	int			level;		/* btree level */
+	xfs_bmbt_ptr_t		*pp;		/* pointer to bmap block addr */
+
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	level = cur->bc_nlevels - 1;
+	block = xfs_bmbt_get_block(cur, level, &bp);
+	/*
+	 * Copy the root into a real block.
+	 */
+	args.mp = cur->bc_mp;
+	pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
+	args.tp = cur->bc_tp;
+	args.fsbno = cur->bc_private.b.firstblock;
+	args.mod = args.minleft = args.alignment = args.total = args.isfl =
+		args.userdata = args.minalignslop = 0;
+	args.minlen = args.maxlen = args.prod = 1;
+	args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
+	if (args.fsbno == NULLFSBLOCK) {
+#ifdef DEBUG
+		if ((error = xfs_btree_check_lptr(cur, INT_GET(*pp, ARCH_CONVERT), level))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+#endif
+		args.fsbno = INT_GET(*pp, ARCH_CONVERT);
+		args.type = XFS_ALLOCTYPE_START_BNO;
+	} else if (args.wasdel)
+		args.type = XFS_ALLOCTYPE_FIRST_AG;
+	else
+		args.type = XFS_ALLOCTYPE_NEAR_BNO;
+	if ((error = xfs_alloc_vextent(&args))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+	if (args.fsbno == NULLFSBLOCK) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		*stat = 0;
+		return 0;
+	}
+	ASSERT(args.len == 1);
+	cur->bc_private.b.firstblock = args.fsbno;
+	cur->bc_private.b.allocated++;
+	cur->bc_private.b.ip->i_d.di_nblocks++;
+	XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip,
+			  XFS_TRANS_DQ_BCOUNT, 1L);
+	bp = xfs_btree_get_bufl(args.mp, cur->bc_tp, args.fsbno, 0);
+	cblock = XFS_BUF_TO_BMBT_BLOCK(bp);
+	*cblock = *block;
+	INT_MOD(block->bb_level, ARCH_CONVERT, +1);
+	INT_SET(block->bb_numrecs, ARCH_CONVERT, 1);
+	cur->bc_nlevels++;
+	cur->bc_ptrs[level + 1] = 1;
+	kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
+	ckp = XFS_BMAP_KEY_IADDR(cblock, 1, cur);
+	memcpy(ckp, kp, INT_GET(cblock->bb_numrecs, ARCH_CONVERT) * sizeof(*kp));
+	cpp = XFS_BMAP_PTR_IADDR(cblock, 1, cur);
+#ifdef DEBUG
+	for (i = 0; i < INT_GET(cblock->bb_numrecs, ARCH_CONVERT); i++) {
+		if ((error = xfs_btree_check_lptr(cur, INT_GET(pp[i], ARCH_CONVERT), level))) {
+			XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+			return error;
+		}
+	}
+#endif
+	memcpy(cpp, pp, INT_GET(cblock->bb_numrecs, ARCH_CONVERT) * sizeof(*pp));
+#ifdef DEBUG
+	if ((error = xfs_btree_check_lptr(cur, (xfs_bmbt_ptr_t)args.fsbno,
+			level))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+#endif
+	INT_SET(*pp, ARCH_CONVERT, args.fsbno);
+	xfs_iroot_realloc(cur->bc_private.b.ip, 1 - INT_GET(cblock->bb_numrecs, ARCH_CONVERT),
+		cur->bc_private.b.whichfork);
+	xfs_btree_setbuf(cur, level, bp);
+	/*
+	 * Do all this logging at the end so that
+	 * the root is at the right level.
+	 */
+	xfs_bmbt_log_block(cur, bp, XFS_BB_ALL_BITS);
+	xfs_bmbt_log_keys(cur, bp, 1, INT_GET(cblock->bb_numrecs, ARCH_CONVERT));
+	xfs_bmbt_log_ptrs(cur, bp, 1, INT_GET(cblock->bb_numrecs, ARCH_CONVERT));
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+	*logflags |=
+		XFS_ILOG_CORE | XFS_ILOG_FBROOT(cur->bc_private.b.whichfork);
+	*stat = 1;
+	return 0;
+}
+
+/*
+ * Set all the fields in a bmap extent record from the uncompressed form.
+ */
+void
+xfs_bmbt_set_all(
+	xfs_bmbt_rec_t	*r,
+	xfs_bmbt_irec_t	*s)
+{
+	int	extent_flag;
+
+	ASSERT((s->br_state == XFS_EXT_NORM) ||
+		(s->br_state == XFS_EXT_UNWRITTEN));
+	extent_flag = (s->br_state == XFS_EXT_NORM) ? 0 : 1;
+	ASSERT((s->br_startoff & XFS_MASK64HI(9)) == 0);
+	ASSERT((s->br_blockcount & XFS_MASK64HI(43)) == 0);
+#if XFS_BIG_BLKNOS
+	ASSERT((s->br_startblock & XFS_MASK64HI(12)) == 0);
+	r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
+		 ((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
+		 ((xfs_bmbt_rec_base_t)s->br_startblock >> 43);
+	r->l1 = ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
+		 ((xfs_bmbt_rec_base_t)s->br_blockcount &
+		 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
+#else	/* !XFS_BIG_BLKNOS */
+	if (ISNULLSTARTBLOCK(s->br_startblock)) {
+		r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
+			((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
+			  (xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
+		r->l1 = XFS_MASK64HI(11) |
+			  ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
+			  ((xfs_bmbt_rec_base_t)s->br_blockcount &
+			   (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
+	} else {
+		r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
+			((xfs_bmbt_rec_base_t)s->br_startoff << 9);
+		r->l1 = ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
+			  ((xfs_bmbt_rec_base_t)s->br_blockcount &
+			   (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
+	}
+#endif	/* XFS_BIG_BLKNOS */
+}
+
+/*
+ * Set all the fields in a bmap extent record from the arguments.
+ */
+void
+xfs_bmbt_set_allf(
+	xfs_bmbt_rec_t	*r,
+	xfs_fileoff_t	o,
+	xfs_fsblock_t	b,
+	xfs_filblks_t	c,
+	xfs_exntst_t	v)
+{
+	int	extent_flag;
+
+	ASSERT((v == XFS_EXT_NORM) || (v == XFS_EXT_UNWRITTEN));
+	extent_flag = (v == XFS_EXT_NORM) ? 0 : 1;
+	ASSERT((o & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0);
+	ASSERT((c & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
+#if XFS_BIG_BLKNOS
+	ASSERT((b & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0);
+	r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
+		((xfs_bmbt_rec_base_t)o << 9) |
+		((xfs_bmbt_rec_base_t)b >> 43);
+	r->l1 = ((xfs_bmbt_rec_base_t)b << 21) |
+		((xfs_bmbt_rec_base_t)c &
+		(xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
+#else	/* !XFS_BIG_BLKNOS */
+	if (ISNULLSTARTBLOCK(b)) {
+		r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
+			((xfs_bmbt_rec_base_t)o << 9) |
+			 (xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
+		r->l1 = XFS_MASK64HI(11) |
+			  ((xfs_bmbt_rec_base_t)b << 21) |
+			  ((xfs_bmbt_rec_base_t)c &
+			   (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
+	} else {
+		r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
+			((xfs_bmbt_rec_base_t)o << 9);
+		r->l1 = ((xfs_bmbt_rec_base_t)b << 21) |
+			 ((xfs_bmbt_rec_base_t)c &
+			 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
+	}
+#endif	/* XFS_BIG_BLKNOS */
+}
+
+#if __BYTE_ORDER != __BIG_ENDIAN
+/*
+ * Set all the fields in a bmap extent record from the uncompressed form.
+ */
+void
+xfs_bmbt_disk_set_all(
+	xfs_bmbt_rec_t	*r,
+	xfs_bmbt_irec_t *s)
+{
+	int	extent_flag;
+
+	ASSERT((s->br_state == XFS_EXT_NORM) ||
+		(s->br_state == XFS_EXT_UNWRITTEN));
+	extent_flag = (s->br_state == XFS_EXT_NORM) ? 0 : 1;
+	ASSERT((s->br_startoff & XFS_MASK64HI(9)) == 0);
+	ASSERT((s->br_blockcount & XFS_MASK64HI(43)) == 0);
+#if XFS_BIG_BLKNOS
+	ASSERT((s->br_startblock & XFS_MASK64HI(12)) == 0);
+	INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
+		  ((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
+		  ((xfs_bmbt_rec_base_t)s->br_startblock >> 43));
+	INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
+		  ((xfs_bmbt_rec_base_t)s->br_blockcount &
+		   (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
+#else	/* !XFS_BIG_BLKNOS */
+	if (ISNULLSTARTBLOCK(s->br_startblock)) {
+		INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
+			((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
+			  (xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
+		INT_SET(r->l1, ARCH_CONVERT, XFS_MASK64HI(11) |
+			  ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
+			  ((xfs_bmbt_rec_base_t)s->br_blockcount &
+			   (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
+	} else {
+		INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
+			((xfs_bmbt_rec_base_t)s->br_startoff << 9));
+		INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
+			  ((xfs_bmbt_rec_base_t)s->br_blockcount &
+			   (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
+	}
+#endif	/* XFS_BIG_BLKNOS */
+}
+
+/*
+ * Set all the fields in a disk format bmap extent record from the arguments.
+ */
+void
+xfs_bmbt_disk_set_allf(
+	xfs_bmbt_rec_t	*r,
+	xfs_fileoff_t	o,
+	xfs_fsblock_t	b,
+	xfs_filblks_t	c,
+	xfs_exntst_t	v)
+{
+	int	extent_flag;
+
+	ASSERT((v == XFS_EXT_NORM) || (v == XFS_EXT_UNWRITTEN));
+	extent_flag = (v == XFS_EXT_NORM) ? 0 : 1;
+	ASSERT((o & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0);
+	ASSERT((c & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
+#if XFS_BIG_BLKNOS
+	ASSERT((b & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0);
+	INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
+		((xfs_bmbt_rec_base_t)o << 9) |
+		((xfs_bmbt_rec_base_t)b >> 43));
+	INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)b << 21) |
+		  ((xfs_bmbt_rec_base_t)c &
+		   (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
+#else	/* !XFS_BIG_BLKNOS */
+	if (ISNULLSTARTBLOCK(b)) {
+		INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
+			((xfs_bmbt_rec_base_t)o << 9) |
+			 (xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
+		INT_SET(r->l1, ARCH_CONVERT, XFS_MASK64HI(11) |
+			  ((xfs_bmbt_rec_base_t)b << 21) |
+			  ((xfs_bmbt_rec_base_t)c &
+			   (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
+	} else {
+		INT_SET(r->l0, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)extent_flag << 63) |
+			((xfs_bmbt_rec_base_t)o << 9));
+		INT_SET(r->l1, ARCH_CONVERT, ((xfs_bmbt_rec_base_t)b << 21) |
+			  ((xfs_bmbt_rec_base_t)c &
+			   (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
+	}
+#endif	/* XFS_BIG_BLKNOS */
+}
+#endif
+
+/*
+ * Set the blockcount field in a bmap extent record.
+ */
+void
+xfs_bmbt_set_blockcount(
+	xfs_bmbt_rec_t	*r,
+	xfs_filblks_t	v)
+{
+	ASSERT((v & XFS_MASK64HI(43)) == 0);
+	r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(43)) |
+		  (xfs_bmbt_rec_base_t)(v & XFS_MASK64LO(21));
+}
+
+/*
+ * Set the startblock field in a bmap extent record.
+ */
+void
+xfs_bmbt_set_startblock(
+	xfs_bmbt_rec_t	*r,
+	xfs_fsblock_t	v)
+{
+#if XFS_BIG_BLKNOS
+	ASSERT((v & XFS_MASK64HI(12)) == 0);
+	r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(55)) |
+		  (xfs_bmbt_rec_base_t)(v >> 43);
+	r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)) |
+		  (xfs_bmbt_rec_base_t)(v << 21);
+#else	/* !XFS_BIG_BLKNOS */
+	if (ISNULLSTARTBLOCK(v)) {
+		r->l0 |= (xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
+		r->l1 = (xfs_bmbt_rec_base_t)XFS_MASK64HI(11) |
+			  ((xfs_bmbt_rec_base_t)v << 21) |
+			  (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
+	} else {
+		r->l0 &= ~(xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
+		r->l1 = ((xfs_bmbt_rec_base_t)v << 21) |
+			  (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
+	}
+#endif	/* XFS_BIG_BLKNOS */
+}
+
+/*
+ * Set the startoff field in a bmap extent record.
+ */
+void
+xfs_bmbt_set_startoff(
+	xfs_bmbt_rec_t	*r,
+	xfs_fileoff_t	v)
+{
+	ASSERT((v & XFS_MASK64HI(9)) == 0);
+	r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) XFS_MASK64HI(1)) |
+		((xfs_bmbt_rec_base_t)v << 9) |
+		  (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
+}
+
+/*
+ * Set the extent state field in a bmap extent record.
+ */
+void
+xfs_bmbt_set_state(
+	xfs_bmbt_rec_t	*r,
+	xfs_exntst_t	v)
+{
+	ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN);
+	if (v == XFS_EXT_NORM)
+		r->l0 &= XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN);
+	else
+		r->l0 |= XFS_MASK64HI(BMBT_EXNTFLAG_BITLEN);
+}
+
+/*
+ * Convert in-memory form of btree root to on-disk form.
+ */
+void
+xfs_bmbt_to_bmdr(
+	xfs_bmbt_block_t	*rblock,
+	int			rblocklen,
+	xfs_bmdr_block_t	*dblock,
+	int			dblocklen)
+{
+	int			dmxr;
+	xfs_bmbt_key_t		*fkp;
+	xfs_bmbt_ptr_t		*fpp;
+	xfs_bmbt_key_t		*tkp;
+	xfs_bmbt_ptr_t		*tpp;
+
+	ASSERT(INT_GET(rblock->bb_magic, ARCH_CONVERT) == XFS_BMAP_MAGIC);
+	ASSERT(INT_GET(rblock->bb_leftsib, ARCH_CONVERT) == NULLDFSBNO);
+	ASSERT(INT_GET(rblock->bb_rightsib, ARCH_CONVERT) == NULLDFSBNO);
+	ASSERT(INT_GET(rblock->bb_level, ARCH_CONVERT) > 0);
+	dblock->bb_level = rblock->bb_level;	/* both in on-disk format */
+	dblock->bb_numrecs = rblock->bb_numrecs;/* both in on-disk format */
+	dmxr = (int)XFS_BTREE_BLOCK_MAXRECS(dblocklen, xfs_bmdr, 0);
+	fkp = XFS_BMAP_BROOT_KEY_ADDR(rblock, 1, rblocklen);
+	tkp = XFS_BTREE_KEY_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
+	fpp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, rblocklen);
+	tpp = XFS_BTREE_PTR_ADDR(dblocklen, xfs_bmdr, dblock, 1, dmxr);
+	dmxr = INT_GET(dblock->bb_numrecs, ARCH_CONVERT);
+	memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
+	memcpy(tpp, fpp, sizeof(*fpp) * dmxr); /* INT_: direct copy */
+}
+
+/*
+ * Update the record to the passed values.
+ */
+int
+xfs_bmbt_update(
+	xfs_btree_cur_t		*cur,
+	xfs_fileoff_t		off,
+	xfs_fsblock_t		bno,
+	xfs_filblks_t		len,
+	xfs_exntst_t		state)
+{
+	xfs_bmbt_block_t	*block;
+	xfs_buf_t		*bp;
+	int			error;
+#ifdef XFS_BMBT_TRACE
+	static char		fname[] = "xfs_bmbt_update";
+#endif
+	xfs_bmbt_key_t		key;
+	int			ptr;
+	xfs_bmbt_rec_t		*rp;
+
+	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
+	XFS_BMBT_TRACE_ARGFFFI(cur, (xfs_dfiloff_t)off, (xfs_dfsbno_t)bno,
+		(xfs_dfilblks_t)len, (int)state);
+	block = xfs_bmbt_get_block(cur, 0, &bp);
+#ifdef DEBUG
+	if ((error = xfs_btree_check_lblock(cur, block, 0, bp))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+#endif
+	ptr = cur->bc_ptrs[0];
+	rp = XFS_BMAP_REC_IADDR(block, ptr, cur);
+	xfs_bmbt_disk_set_allf(rp, off, bno, len, state);
+	xfs_bmbt_log_recs(cur, bp, ptr, ptr);
+	if (ptr > 1) {
+		XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+		return 0;
+	}
+	INT_SET(key.br_startoff, ARCH_CONVERT, off);
+	if ((error = xfs_bmbt_updkey(cur, &key, 1))) {
+		XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+		return error;
+	}
+	XFS_BMBT_TRACE_CURSOR(cur, EXIT);
+	return 0;
+}
+
+/*
+ * Check an extent list, which has just been read, for
+ * any bit in the extent flag field. ASSERT on debug
+ * kernels, as this condition should not occur.
+ * Return an error condition (1) if any flags found,
+ * otherwise return 0.
+ */
+
+int
+xfs_check_nostate_extents(
+	xfs_bmbt_rec_t		*ep,
+	xfs_extnum_t		num)
+{
+	for (; num > 0; num--, ep++) {
+		if ((ep->l0 >>
+		     (64 - BMBT_EXNTFLAG_BITLEN)) != 0) {
+			ASSERT(0);
+			return 1;
+		}
+	}
+	return 0;
+}