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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.
 */
#ifndef	_XFS_EXTFREE_ITEM_H
#define	_XFS_EXTFREE_ITEM_H

#ident	"$Revision: 1.9 $"

struct xfs_mount;
struct zone;

typedef struct xfs_extent {
	xfs_dfsbno_t	ext_start;
	xfs_extlen_t	ext_len;
} xfs_extent_t;

/*
 * This is the structure used to lay out an efi log item in the
 * log.  The efi_extents field is a variable size array whose
 * size is given by efi_nextents.
 */
typedef struct xfs_efi_log_format {
	unsigned short		efi_type;	/* efi log item type */
	unsigned short		efi_size;	/* size of this item */
	uint			efi_nextents;	/* # extents to free */
	__uint64_t		efi_id;		/* efi identifier */
	xfs_extent_t		efi_extents[1];	/* array of extents to free */
} xfs_efi_log_format_t;

/*
 * Max number of extents in fast allocation path.
 */
#define	XFS_EFI_MAX_FAST_EXTENTS	16

/*
 * Define EFI flags.
 */
#define	XFS_EFI_RECOVERED	0x1
#define	XFS_EFI_COMMITTED	0x2
#define	XFS_EFI_CANCELED	0x4

/*
 * This is the "extent free intention" log item.  It is used
 * to log the fact that some extents need to be free.  It is
 * used in conjunction with the "extent free done" log item
 * described below.
 */
typedef struct xfs_efi_log_item {
	xfs_log_item_t		efi_item;
	uint			efi_flags;	/* misc flags */
	uint			efi_next_extent;
	xfs_efi_log_format_t	efi_format;
} xfs_efi_log_item_t;

/*
 * This is the structure used to lay out an efd log item in the
 * log.  The efd_extents array is a variable size array whose
 * size is given by efd_nextents;
 */
typedef struct xfs_efd_log_format {
	unsigned short		efd_type;	/* efd log item type */
	unsigned short		efd_size;	/* size of this item */
	uint			efd_nextents;	/* # of extents freed */
	__uint64_t		efd_efi_id;	/* id of corresponding efi */
	xfs_extent_t		efd_extents[1];	/* array of extents freed */
} xfs_efd_log_format_t;

/*
 * This is the "extent free done" log item.  It is used to log
 * the fact that some extents earlier mentioned in an efi item
 * have been freed.
 */
typedef struct xfs_efd_log_item {
	xfs_log_item_t		efd_item;
	xfs_efi_log_item_t	*efd_efip;
	uint			efd_next_extent;
	xfs_efd_log_format_t	efd_format;
} xfs_efd_log_item_t;

/*
 * Max number of extents in fast allocation path.
 */
#define	XFS_EFD_MAX_FAST_EXTENTS	16

extern struct zone	*xfs_efi_zone;
extern struct zone	*xfs_efd_zone;

xfs_efi_log_item_t	*xfs_efi_init(struct xfs_mount *, uint);
xfs_efd_log_item_t	*xfs_efd_init(struct xfs_mount *, xfs_efi_log_item_t *,
				      uint);

#endif	/* _XFS_EXTFREE_ITEM_H */