libxfs: move source files

Move all the source files that are shared with userspace into
libxfs/. This is done as one big chunk simpy to get it done
quickly

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

1 files changed, 0 insertions, 967 deletions

diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c
deleted file mode 100644
index de65bb8..0000000
--- a/fs/xfs/xfs_bmap_btree.c
+++ /dev/null
@@ -1,967 +0,0 @@
-/*
- * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
- * All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms 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.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write the Free Software Foundation,
- * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-#include "xfs.h"
-#include "xfs_fs.h"
-#include "xfs_shared.h"
-#include "xfs_format.h"
-#include "xfs_log_format.h"
-#include "xfs_trans_resv.h"
-#include "xfs_bit.h"
-#include "xfs_sb.h"
-#include "xfs_ag.h"
-#include "xfs_mount.h"
-#include "xfs_inode.h"
-#include "xfs_trans.h"
-#include "xfs_inode_item.h"
-#include "xfs_alloc.h"
-#include "xfs_btree.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_bmap.h"
-#include "xfs_error.h"
-#include "xfs_quota.h"
-#include "xfs_trace.h"
-#include "xfs_cksum.h"
-#include "xfs_dinode.h"
-
-/*
- * 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;
-}
-
-/*
- * Convert on-disk form of btree root to in-memory form.
- */
-void
-xfs_bmdr_to_bmbt(
-	struct xfs_inode	*ip,
-	xfs_bmdr_block_t	*dblock,
-	int			dblocklen,
-	struct xfs_btree_block	*rblock,
-	int			rblocklen)
-{
-	struct xfs_mount	*mp = ip->i_mount;
-	int			dmxr;
-	xfs_bmbt_key_t		*fkp;
-	__be64			*fpp;
-	xfs_bmbt_key_t		*tkp;
-	__be64			*tpp;
-
-	if (xfs_sb_version_hascrc(&mp->m_sb))
-		xfs_btree_init_block_int(mp, rblock, XFS_BUF_DADDR_NULL,
-				 XFS_BMAP_CRC_MAGIC, 0, 0, ip->i_ino,
-				 XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS);
-	else
-		xfs_btree_init_block_int(mp, rblock, XFS_BUF_DADDR_NULL,
-				 XFS_BMAP_MAGIC, 0, 0, ip->i_ino,
-				 XFS_BTREE_LONG_PTRS);
-
-	rblock->bb_level = dblock->bb_level;
-	ASSERT(be16_to_cpu(rblock->bb_level) > 0);
-	rblock->bb_numrecs = dblock->bb_numrecs;
-	dmxr = xfs_bmdr_maxrecs(dblocklen, 0);
-	fkp = XFS_BMDR_KEY_ADDR(dblock, 1);
-	tkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1);
-	fpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr);
-	tpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen);
-	dmxr = be16_to_cpu(dblock->bb_numrecs);
-	memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
-	memcpy(tpp, fpp, sizeof(*fpp) * dmxr);
-}
-
-/*
- * 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 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_host_t *r,
-	xfs_bmbt_irec_t *s)
-{
-	__xfs_bmbt_get_all(r->l0, r->l1, s);
-}
-
-/*
- * Extract the blockcount field from an in memory bmap extent record.
- */
-xfs_filblks_t
-xfs_bmbt_get_blockcount(
-	xfs_bmbt_rec_host_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_host_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_host_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_host_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);
-}
-
-/*
- * 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)(be64_to_cpu(r->l1) & xfs_mask64lo(21));
-}
-
-/*
- * 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)be64_to_cpu(r->l0) &
-		 xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
-}
-
-
-/*
- * Set all the fields in a bmap extent record from the arguments.
- */
-void
-xfs_bmbt_set_allf(
-	xfs_bmbt_rec_host_t	*r,
-	xfs_fileoff_t		startoff,
-	xfs_fsblock_t		startblock,
-	xfs_filblks_t		blockcount,
-	xfs_exntst_t		state)
-{
-	int		extent_flag = (state == XFS_EXT_NORM) ? 0 : 1;
-
-	ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN);
-	ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0);
-	ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
-
-#if XFS_BIG_BLKNOS
-	ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0);
-
-	r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
-		((xfs_bmbt_rec_base_t)startoff << 9) |
-		((xfs_bmbt_rec_base_t)startblock >> 43);
-	r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) |
-		((xfs_bmbt_rec_base_t)blockcount &
-		(xfs_bmbt_rec_base_t)xfs_mask64lo(21));
-#else	/* !XFS_BIG_BLKNOS */
-	if (isnullstartblock(startblock)) {
-		r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
-			((xfs_bmbt_rec_base_t)startoff << 9) |
-			 (xfs_bmbt_rec_base_t)xfs_mask64lo(9);
-		r->l1 = xfs_mask64hi(11) |
-			  ((xfs_bmbt_rec_base_t)startblock << 21) |
-			  ((xfs_bmbt_rec_base_t)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)startoff << 9);
-		r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) |
-			 ((xfs_bmbt_rec_base_t)blockcount &
-			 (xfs_bmbt_rec_base_t)xfs_mask64lo(21));
-	}
-#endif	/* XFS_BIG_BLKNOS */
-}
-
-/*
- * Set all the fields in a bmap extent record from the uncompressed form.
- */
-void
-xfs_bmbt_set_all(
-	xfs_bmbt_rec_host_t *r,
-	xfs_bmbt_irec_t	*s)
-{
-	xfs_bmbt_set_allf(r, s->br_startoff, s->br_startblock,
-			     s->br_blockcount, s->br_state);
-}
-
-
-/*
- * 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		startoff,
-	xfs_fsblock_t		startblock,
-	xfs_filblks_t		blockcount,
-	xfs_exntst_t		state)
-{
-	int			extent_flag = (state == XFS_EXT_NORM) ? 0 : 1;
-
-	ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN);
-	ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0);
-	ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
-
-#if XFS_BIG_BLKNOS
-	ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0);
-
-	r->l0 = cpu_to_be64(
-		((xfs_bmbt_rec_base_t)extent_flag << 63) |
-		 ((xfs_bmbt_rec_base_t)startoff << 9) |
-		 ((xfs_bmbt_rec_base_t)startblock >> 43));
-	r->l1 = cpu_to_be64(
-		((xfs_bmbt_rec_base_t)startblock << 21) |
-		 ((xfs_bmbt_rec_base_t)blockcount &
-		  (xfs_bmbt_rec_base_t)xfs_mask64lo(21)));
-#else	/* !XFS_BIG_BLKNOS */
-	if (isnullstartblock(startblock)) {
-		r->l0 = cpu_to_be64(
-			((xfs_bmbt_rec_base_t)extent_flag << 63) |
-			 ((xfs_bmbt_rec_base_t)startoff << 9) |
-			  (xfs_bmbt_rec_base_t)xfs_mask64lo(9));
-		r->l1 = cpu_to_be64(xfs_mask64hi(11) |
-			  ((xfs_bmbt_rec_base_t)startblock << 21) |
-			  ((xfs_bmbt_rec_base_t)blockcount &
-			   (xfs_bmbt_rec_base_t)xfs_mask64lo(21)));
-	} else {
-		r->l0 = cpu_to_be64(
-			((xfs_bmbt_rec_base_t)extent_flag << 63) |
-			 ((xfs_bmbt_rec_base_t)startoff << 9));
-		r->l1 = cpu_to_be64(
-			((xfs_bmbt_rec_base_t)startblock << 21) |
-			 ((xfs_bmbt_rec_base_t)blockcount &
-			  (xfs_bmbt_rec_base_t)xfs_mask64lo(21)));
-	}
-#endif	/* XFS_BIG_BLKNOS */
-}
-
-/*
- * Set all the fields in a bmap extent record from the uncompressed form.
- */
-STATIC void
-xfs_bmbt_disk_set_all(
-	xfs_bmbt_rec_t	*r,
-	xfs_bmbt_irec_t *s)
-{
-	xfs_bmbt_disk_set_allf(r, s->br_startoff, s->br_startblock,
-				  s->br_blockcount, s->br_state);
-}
-
-/*
- * Set the blockcount field in a bmap extent record.
- */
-void
-xfs_bmbt_set_blockcount(
-	xfs_bmbt_rec_host_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_host_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_host_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_host_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(
-	struct xfs_mount	*mp,
-	struct xfs_btree_block	*rblock,
-	int			rblocklen,
-	xfs_bmdr_block_t	*dblock,
-	int			dblocklen)
-{
-	int			dmxr;
-	xfs_bmbt_key_t		*fkp;
-	__be64			*fpp;
-	xfs_bmbt_key_t		*tkp;
-	__be64			*tpp;
-
-	if (xfs_sb_version_hascrc(&mp->m_sb)) {
-		ASSERT(rblock->bb_magic == cpu_to_be32(XFS_BMAP_CRC_MAGIC));
-		ASSERT(uuid_equal(&rblock->bb_u.l.bb_uuid, &mp->m_sb.sb_uuid));
-		ASSERT(rblock->bb_u.l.bb_blkno ==
-		       cpu_to_be64(XFS_BUF_DADDR_NULL));
-	} else
-		ASSERT(rblock->bb_magic == cpu_to_be32(XFS_BMAP_MAGIC));
-	ASSERT(rblock->bb_u.l.bb_leftsib == cpu_to_be64(NULLDFSBNO));
-	ASSERT(rblock->bb_u.l.bb_rightsib == cpu_to_be64(NULLDFSBNO));
-	ASSERT(rblock->bb_level != 0);
-	dblock->bb_level = rblock->bb_level;
-	dblock->bb_numrecs = rblock->bb_numrecs;
-	dmxr = xfs_bmdr_maxrecs(dblocklen, 0);
-	fkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1);
-	tkp = XFS_BMDR_KEY_ADDR(dblock, 1);
-	fpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen);
-	tpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr);
-	dmxr = be16_to_cpu(dblock->bb_numrecs);
-	memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
-	memcpy(tpp, fpp, sizeof(*fpp) * dmxr);
-}
-
-/*
- * Check extent records, which have 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_ifork_t		*ifp,
-	xfs_extnum_t		idx,
-	xfs_extnum_t		num)
-{
-	for (; num > 0; num--, idx++) {
-		xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx);
-		if ((ep->l0 >>
-		     (64 - BMBT_EXNTFLAG_BITLEN)) != 0) {
-			ASSERT(0);
-			return 1;
-		}
-	}
-	return 0;
-}
-
-
-STATIC struct xfs_btree_cur *
-xfs_bmbt_dup_cursor(
-	struct xfs_btree_cur	*cur)
-{
-	struct xfs_btree_cur	*new;
-
-	new = xfs_bmbt_init_cursor(cur->bc_mp, cur->bc_tp,
-			cur->bc_private.b.ip, cur->bc_private.b.whichfork);
-
-	/*
-	 * Copy the firstblock, flist, and flags values,
-	 * since init cursor doesn't get them.
-	 */
-	new->bc_private.b.firstblock = cur->bc_private.b.firstblock;
-	new->bc_private.b.flist = cur->bc_private.b.flist;
-	new->bc_private.b.flags = cur->bc_private.b.flags;
-
-	return new;
-}
-
-STATIC void
-xfs_bmbt_update_cursor(
-	struct xfs_btree_cur	*src,
-	struct xfs_btree_cur	*dst)
-{
-	ASSERT((dst->bc_private.b.firstblock != NULLFSBLOCK) ||
-	       (dst->bc_private.b.ip->i_d.di_flags & XFS_DIFLAG_REALTIME));
-	ASSERT(dst->bc_private.b.flist == src->bc_private.b.flist);
-
-	dst->bc_private.b.allocated += src->bc_private.b.allocated;
-	dst->bc_private.b.firstblock = src->bc_private.b.firstblock;
-
-	src->bc_private.b.allocated = 0;
-}
-
-STATIC int
-xfs_bmbt_alloc_block(
-	struct xfs_btree_cur	*cur,
-	union xfs_btree_ptr	*start,
-	union xfs_btree_ptr	*new,
-	int			*stat)
-{
-	xfs_alloc_arg_t		args;		/* block allocation args */
-	int			error;		/* error return value */
-
-	memset(&args, 0, sizeof(args));
-	args.tp = cur->bc_tp;
-	args.mp = cur->bc_mp;
-	args.fsbno = cur->bc_private.b.firstblock;
-	args.firstblock = args.fsbno;
-
-	if (args.fsbno == NULLFSBLOCK) {
-		args.fsbno = be64_to_cpu(start->l);
-		args.type = XFS_ALLOCTYPE_START_BNO;
-		/*
-		 * Make sure there is sufficient room left in the AG to
-		 * complete a full tree split for an extent insert.  If
-		 * we are converting the middle part of an extent then
-		 * we may need space for two tree splits.
-		 *
-		 * We are relying on the caller to make the correct block
-		 * reservation for this operation to succeed.  If the
-		 * reservation amount is insufficient then we may fail a
-		 * block allocation here and corrupt the filesystem.
-		 */
-		args.minleft = xfs_trans_get_block_res(args.tp);
-	} else if (cur->bc_private.b.flist->xbf_low) {
-		args.type = XFS_ALLOCTYPE_START_BNO;
-	} else {
-		args.type = XFS_ALLOCTYPE_NEAR_BNO;
-	}
-
-	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) {
-		error = ENOSPC;
-		goto error0;
-	}
-	error = xfs_alloc_vextent(&args);
-	if (error)
-		goto error0;
-
-	if (args.fsbno == NULLFSBLOCK && args.minleft) {
-		/*
-		 * Could not find an AG with enough free space to satisfy
-		 * a full btree split.  Try again without minleft and if
-		 * successful activate the lowspace algorithm.
-		 */
-		args.fsbno = 0;
-		args.type = XFS_ALLOCTYPE_FIRST_AG;
-		args.minleft = 0;
-		error = xfs_alloc_vextent(&args);
-		if (error)
-			goto error0;
-		cur->bc_private.b.flist->xbf_low = 1;
-	}
-	if (args.fsbno == NULLFSBLOCK) {
-		XFS_BTREE_TRACE_CURSOR(cur, XBT_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.tp, cur->bc_private.b.ip,
-			XFS_TRANS_DQ_BCOUNT, 1L);
-
-	new->l = cpu_to_be64(args.fsbno);
-
-	XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
-	*stat = 1;
-	return 0;
-
- error0:
-	XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR);
-	return error;
-}
-
-STATIC int
-xfs_bmbt_free_block(
-	struct xfs_btree_cur	*cur,
-	struct xfs_buf		*bp)
-{
-	struct xfs_mount	*mp = cur->bc_mp;
-	struct xfs_inode	*ip = cur->bc_private.b.ip;
-	struct xfs_trans	*tp = cur->bc_tp;
-	xfs_fsblock_t		fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp));
-
-	xfs_bmap_add_free(fsbno, 1, cur->bc_private.b.flist, mp);
-	ip->i_d.di_nblocks--;
-
-	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
-	xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
-	xfs_trans_binval(tp, bp);
-	return 0;
-}
-
-STATIC int
-xfs_bmbt_get_minrecs(
-	struct xfs_btree_cur	*cur,
-	int			level)
-{
-	if (level == cur->bc_nlevels - 1) {
-		struct xfs_ifork	*ifp;
-
-		ifp = XFS_IFORK_PTR(cur->bc_private.b.ip,
-				    cur->bc_private.b.whichfork);
-
-		return xfs_bmbt_maxrecs(cur->bc_mp,
-					ifp->if_broot_bytes, level == 0) / 2;
-	}
-
-	return cur->bc_mp->m_bmap_dmnr[level != 0];
-}
-
-int
-xfs_bmbt_get_maxrecs(
-	struct xfs_btree_cur	*cur,
-	int			level)
-{
-	if (level == cur->bc_nlevels - 1) {
-		struct xfs_ifork	*ifp;
-
-		ifp = XFS_IFORK_PTR(cur->bc_private.b.ip,
-				    cur->bc_private.b.whichfork);
-
-		return xfs_bmbt_maxrecs(cur->bc_mp,
-					ifp->if_broot_bytes, level == 0);
-	}
-
-	return cur->bc_mp->m_bmap_dmxr[level != 0];
-
-}
-
-/*
- * Get the maximum records we could store in the on-disk format.
- *
- * For non-root nodes this is equivalent to xfs_bmbt_get_maxrecs, but
- * for the root node this checks the available space in the dinode fork
- * so that we can resize the in-memory buffer to match it.  After a
- * resize to the maximum size this function returns the same value
- * as xfs_bmbt_get_maxrecs for the root node, too.
- */
-STATIC int
-xfs_bmbt_get_dmaxrecs(
-	struct xfs_btree_cur	*cur,
-	int			level)
-{
-	if (level != cur->bc_nlevels - 1)
-		return cur->bc_mp->m_bmap_dmxr[level != 0];
-	return xfs_bmdr_maxrecs(cur->bc_private.b.forksize, level == 0);
-}
-
-STATIC void
-xfs_bmbt_init_key_from_rec(
-	union xfs_btree_key	*key,
-	union xfs_btree_rec	*rec)
-{
-	key->bmbt.br_startoff =
-		cpu_to_be64(xfs_bmbt_disk_get_startoff(&rec->bmbt));
-}
-
-STATIC void
-xfs_bmbt_init_rec_from_key(
-	union xfs_btree_key	*key,
-	union xfs_btree_rec	*rec)
-{
-	ASSERT(key->bmbt.br_startoff != 0);
-
-	xfs_bmbt_disk_set_allf(&rec->bmbt, be64_to_cpu(key->bmbt.br_startoff),
-			       0, 0, XFS_EXT_NORM);
-}
-
-STATIC void
-xfs_bmbt_init_rec_from_cur(
-	struct xfs_btree_cur	*cur,
-	union xfs_btree_rec	*rec)
-{
-	xfs_bmbt_disk_set_all(&rec->bmbt, &cur->bc_rec.b);
-}
-
-STATIC void
-xfs_bmbt_init_ptr_from_cur(
-	struct xfs_btree_cur	*cur,
-	union xfs_btree_ptr	*ptr)
-{
-	ptr->l = 0;
-}
-
-STATIC __int64_t
-xfs_bmbt_key_diff(
-	struct xfs_btree_cur	*cur,
-	union xfs_btree_key	*key)
-{
-	return (__int64_t)be64_to_cpu(key->bmbt.br_startoff) -
-				      cur->bc_rec.b.br_startoff;
-}
-
-static bool
-xfs_bmbt_verify(
-	struct xfs_buf		*bp)
-{
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
-	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
-	unsigned int		level;
-
-	switch (block->bb_magic) {
-	case cpu_to_be32(XFS_BMAP_CRC_MAGIC):
-		if (!xfs_sb_version_hascrc(&mp->m_sb))
-			return false;
-		if (!uuid_equal(&block->bb_u.l.bb_uuid, &mp->m_sb.sb_uuid))
-			return false;
-		if (be64_to_cpu(block->bb_u.l.bb_blkno) != bp->b_bn)
-			return false;
-		/*
-		 * XXX: need a better way of verifying the owner here. Right now
-		 * just make sure there has been one set.
-		 */
-		if (be64_to_cpu(block->bb_u.l.bb_owner) == 0)
-			return false;
-		/* fall through */
-	case cpu_to_be32(XFS_BMAP_MAGIC):
-		break;
-	default:
-		return false;
-	}
-
-	/*
-	 * numrecs and level verification.
-	 *
-	 * We don't know what fork we belong to, so just verify that the level
-	 * is less than the maximum of the two. Later checks will be more
-	 * precise.
-	 */
-	level = be16_to_cpu(block->bb_level);
-	if (level > max(mp->m_bm_maxlevels[0], mp->m_bm_maxlevels[1]))
-		return false;
-	if (be16_to_cpu(block->bb_numrecs) > mp->m_bmap_dmxr[level != 0])
-		return false;
-
-	/* sibling pointer verification */
-	if (!block->bb_u.l.bb_leftsib ||
-	    (block->bb_u.l.bb_leftsib != cpu_to_be64(NULLDFSBNO) &&
-	     !XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_leftsib))))
-		return false;
-	if (!block->bb_u.l.bb_rightsib ||
-	    (block->bb_u.l.bb_rightsib != cpu_to_be64(NULLDFSBNO) &&
-	     !XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_rightsib))))
-		return false;
-
-	return true;
-}
-
-static void
-xfs_bmbt_read_verify(
-	struct xfs_buf	*bp)
-{
-	if (!xfs_btree_lblock_verify_crc(bp))
-		xfs_buf_ioerror(bp, EFSBADCRC);
-	else if (!xfs_bmbt_verify(bp))
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
-
-	if (bp->b_error) {
-		trace_xfs_btree_corrupt(bp, _RET_IP_);
-		xfs_verifier_error(bp);
-	}
-}
-
-static void
-xfs_bmbt_write_verify(
-	struct xfs_buf	*bp)
-{
-	if (!xfs_bmbt_verify(bp)) {
-		trace_xfs_btree_corrupt(bp, _RET_IP_);
-		xfs_buf_ioerror(bp, EFSCORRUPTED);
-		xfs_verifier_error(bp);
-		return;
-	}
-	xfs_btree_lblock_calc_crc(bp);
-}
-
-const struct xfs_buf_ops xfs_bmbt_buf_ops = {
-	.verify_read = xfs_bmbt_read_verify,
-	.verify_write = xfs_bmbt_write_verify,
-};
-
-
-#if defined(DEBUG) || defined(XFS_WARN)
-STATIC int
-xfs_bmbt_keys_inorder(
-	struct xfs_btree_cur	*cur,
-	union xfs_btree_key	*k1,
-	union xfs_btree_key	*k2)
-{
-	return be64_to_cpu(k1->bmbt.br_startoff) <
-		be64_to_cpu(k2->bmbt.br_startoff);
-}
-
-STATIC int
-xfs_bmbt_recs_inorder(
-	struct xfs_btree_cur	*cur,
-	union xfs_btree_rec	*r1,
-	union xfs_btree_rec	*r2)
-{
-	return xfs_bmbt_disk_get_startoff(&r1->bmbt) +
-		xfs_bmbt_disk_get_blockcount(&r1->bmbt) <=
-		xfs_bmbt_disk_get_startoff(&r2->bmbt);
-}
-#endif	/* DEBUG */
-
-static const struct xfs_btree_ops xfs_bmbt_ops = {
-	.rec_len		= sizeof(xfs_bmbt_rec_t),
-	.key_len		= sizeof(xfs_bmbt_key_t),
-
-	.dup_cursor		= xfs_bmbt_dup_cursor,
-	.update_cursor		= xfs_bmbt_update_cursor,
-	.alloc_block		= xfs_bmbt_alloc_block,
-	.free_block		= xfs_bmbt_free_block,
-	.get_maxrecs		= xfs_bmbt_get_maxrecs,
-	.get_minrecs		= xfs_bmbt_get_minrecs,
-	.get_dmaxrecs		= xfs_bmbt_get_dmaxrecs,
-	.init_key_from_rec	= xfs_bmbt_init_key_from_rec,
-	.init_rec_from_key	= xfs_bmbt_init_rec_from_key,
-	.init_rec_from_cur	= xfs_bmbt_init_rec_from_cur,
-	.init_ptr_from_cur	= xfs_bmbt_init_ptr_from_cur,
-	.key_diff		= xfs_bmbt_key_diff,
-	.buf_ops		= &xfs_bmbt_buf_ops,
-#if defined(DEBUG) || defined(XFS_WARN)
-	.keys_inorder		= xfs_bmbt_keys_inorder,
-	.recs_inorder		= xfs_bmbt_recs_inorder,
-#endif
-};
-
-/*
- * Allocate a new bmap btree cursor.
- */
-struct xfs_btree_cur *				/* new bmap btree cursor */
-xfs_bmbt_init_cursor(
-	struct xfs_mount	*mp,		/* file system mount point */
-	struct xfs_trans	*tp,		/* transaction pointer */
-	struct xfs_inode	*ip,		/* inode owning the btree */
-	int			whichfork)	/* data or attr fork */
-{
-	struct xfs_ifork	*ifp = XFS_IFORK_PTR(ip, whichfork);
-	struct xfs_btree_cur	*cur;
-
-	cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP);
-
-	cur->bc_tp = tp;
-	cur->bc_mp = mp;
-	cur->bc_nlevels = be16_to_cpu(ifp->if_broot->bb_level) + 1;
-	cur->bc_btnum = XFS_BTNUM_BMAP;
-	cur->bc_blocklog = mp->m_sb.sb_blocklog;
-
-	cur->bc_ops = &xfs_bmbt_ops;
-	cur->bc_flags = XFS_BTREE_LONG_PTRS | XFS_BTREE_ROOT_IN_INODE;
-	if (xfs_sb_version_hascrc(&mp->m_sb))
-		cur->bc_flags |= XFS_BTREE_CRC_BLOCKS;
-
-	cur->bc_private.b.forksize = XFS_IFORK_SIZE(ip, whichfork);
-	cur->bc_private.b.ip = ip;
-	cur->bc_private.b.firstblock = NULLFSBLOCK;
-	cur->bc_private.b.flist = NULL;
-	cur->bc_private.b.allocated = 0;
-	cur->bc_private.b.flags = 0;
-	cur->bc_private.b.whichfork = whichfork;
-
-	return cur;
-}
-
-/*
- * Calculate number of records in a bmap btree block.
- */
-int
-xfs_bmbt_maxrecs(
-	struct xfs_mount	*mp,
-	int			blocklen,
-	int			leaf)
-{
-	blocklen -= XFS_BMBT_BLOCK_LEN(mp);
-
-	if (leaf)
-		return blocklen / sizeof(xfs_bmbt_rec_t);
-	return blocklen / (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t));
-}
-
-/*
- * Calculate number of records in a bmap btree inode root.
- */
-int
-xfs_bmdr_maxrecs(
-	int			blocklen,
-	int			leaf)
-{
-	blocklen -= sizeof(xfs_bmdr_block_t);
-
-	if (leaf)
-		return blocklen / sizeof(xfs_bmdr_rec_t);
-	return blocklen / (sizeof(xfs_bmdr_key_t) + sizeof(xfs_bmdr_ptr_t));
-}
-
-/*
- * Change the owner of a btree format fork fo the inode passed in. Change it to
- * the owner of that is passed in so that we can change owners before or after
- * we switch forks between inodes. The operation that the caller is doing will
- * determine whether is needs to change owner before or after the switch.
- *
- * For demand paged transactional modification, the fork switch should be done
- * after reading in all the blocks, modifying them and pinning them in the
- * transaction. For modification when the buffers are already pinned in memory,
- * the fork switch can be done before changing the owner as we won't need to
- * validate the owner until the btree buffers are unpinned and writes can occur
- * again.
- *
- * For recovery based ownership change, there is no transactional context and
- * so a buffer list must be supplied so that we can record the buffers that we
- * modified for the caller to issue IO on.
- */
-int
-xfs_bmbt_change_owner(
-	struct xfs_trans	*tp,
-	struct xfs_inode	*ip,
-	int			whichfork,
-	xfs_ino_t		new_owner,
-	struct list_head	*buffer_list)
-{
-	struct xfs_btree_cur	*cur;
-	int			error;
-
-	ASSERT(tp || buffer_list);
-	ASSERT(!(tp && buffer_list));
-	if (whichfork == XFS_DATA_FORK)
-		ASSERT(ip->i_d.di_format == XFS_DINODE_FMT_BTREE);
-	else
-		ASSERT(ip->i_d.di_aformat == XFS_DINODE_FMT_BTREE);
-
-	cur = xfs_bmbt_init_cursor(ip->i_mount, tp, ip, whichfork);
-	if (!cur)
-		return ENOMEM;
-
-	error = xfs_btree_change_owner(cur, new_owner, buffer_list);
-	xfs_btree_del_cursor(cur, error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
-	return error;
-}