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Encumbrance review done.
Add copyright and license words consistent with GPL.
Refer to http://fsg.melbourne.sgi.com/reviews/ for details.

There is a slight change in the license terms and conditions words
to go with the copyrights, so most of the files are not getting
new GPL's, just updated versions ... but there are 20-30 more files
here as well.

/*
 * Copyright (C) 1999 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; either version 2 of the License, or (at
 * your option) any later version.
 * 
 * This program is distributed in the hope that it will 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., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 */
#ident "$Revision: 1.13 $"
#if defined(__linux__)
#include <xfs_linux.h>
#endif

#ifdef SIM
#define _KERNEL	1
#endif
#include <sys/param.h>
#include "xfs_buf.h"
#include <sys/sysmacros.h>
#include <sys/vnode.h>
#include <sys/uuid.h>
#include <sys/debug.h>
#ifdef SIM
#undef _KERNEL
#else
#include <sys/sysinfo.h>
#include <sys/kmem.h>
#include <sys/conf.h>
#include <sys/systm.h>
#endif
#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_dir.h"
#include "xfs_mount.h"
#include "xfs_trans_priv.h"
#include "xfs_extfree_item.h"

#ifdef SIM
#include "sim.h"
#endif

/*
 * This routine is called to allocate an "extent free intention"
 * log item that will hold nextents worth of extents.  The
 * caller must use all nextents extents, because we are not
 * flexible about this at all.
 */
xfs_efi_log_item_t *
xfs_trans_get_efi(xfs_trans_t	*tp,
		  uint		nextents)
{
	xfs_efi_log_item_t	*efip;

	ASSERT(tp != NULL);
	ASSERT(nextents > 0);

	efip = xfs_efi_init(tp->t_mountp, nextents);
	ASSERT(efip != NULL);

	/*
	 * Get a log_item_desc to point at the new item.
	 */
	(void) xfs_trans_add_item(tp, (xfs_log_item_t*)efip);

	return (efip);
}

/*
 * This routine is called to indicate that the described
 * extent is to be logged as needing to be freed.  It should
 * be called once for each extent to be freed.
 */
void
xfs_trans_log_efi_extent(xfs_trans_t		*tp,
			 xfs_efi_log_item_t	*efip,
			 xfs_fsblock_t		start_block,
			 xfs_extlen_t		ext_len)
{
	xfs_log_item_desc_t	*lidp;
	uint			next_extent;
	xfs_extent_t		*extp;

	lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)efip);
	ASSERT(lidp != NULL);

	tp->t_flags |= XFS_TRANS_DIRTY;
	lidp->lid_flags |= XFS_LID_DIRTY;

	next_extent = efip->efi_next_extent;
	ASSERT(next_extent < efip->efi_format.efi_nextents);
	extp = &(efip->efi_format.efi_extents[next_extent]);
	extp->ext_start = start_block;
	extp->ext_len = ext_len;
	efip->efi_next_extent++;
}


/*
 * This routine is called to allocate an "extent free done"
 * log item that will hold nextents worth of extents.  The
 * caller must use all nextents extents, because we are not
 * flexible about this at all.
 */
xfs_efd_log_item_t *
xfs_trans_get_efd(xfs_trans_t		*tp,
		  xfs_efi_log_item_t	*efip,
		  uint			nextents)
{
	xfs_efd_log_item_t	*efdp;

	ASSERT(tp != NULL);
	ASSERT(nextents > 0);

	efdp = xfs_efd_init(tp->t_mountp, efip, nextents);
	ASSERT(efdp != NULL);

	/*
	 * Get a log_item_desc to point at the new item.
	 */
	(void) xfs_trans_add_item(tp, (xfs_log_item_t*)efdp);

	return (efdp);
}

/*
 * This routine is called to indicate that the described
 * extent is to be logged as having been freed.  It should
 * be called once for each extent freed.
 */
void
xfs_trans_log_efd_extent(xfs_trans_t		*tp,
			 xfs_efd_log_item_t	*efdp,
			 xfs_fsblock_t		start_block,
			 xfs_extlen_t		ext_len)
{
	xfs_log_item_desc_t	*lidp;
	uint			next_extent;
	xfs_extent_t		*extp;

	lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)efdp);
	ASSERT(lidp != NULL);

	tp->t_flags |= XFS_TRANS_DIRTY;
	lidp->lid_flags |= XFS_LID_DIRTY;

	next_extent = efdp->efd_next_extent;
	ASSERT(next_extent < efdp->efd_format.efd_nextents);
	extp = &(efdp->efd_format.efd_extents[next_extent]);
	extp->ext_start = start_block;
	extp->ext_len = ext_len;
	efdp->efd_next_extent++;
}