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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 _FS_XFS_DIR2_BLOCK_H
#define	_FS_XFS_DIR2_BLOCK_H

#ident "$Revision: 1.1 $"

/*
 * xfs_dir2_block.h
 * Directory version 2, single block format structures
 */

struct dirent;
struct uio;
struct xfs_dabuf;
struct xfs_da_args;
struct xfs_dir2_data_hdr;
struct xfs_dir2_leaf_entry;
struct xfs_inode;
struct xfs_mount;
struct xfs_trans;

/*
 * The single block format is as follows:
 * xfs_dir2_data_hdr_t structure
 * xfs_dir2_data_entry_t and xfs_dir2_data_unused_t structures
 * xfs_dir2_leaf_entry_t structures
 * xfs_dir2_block_tail_t structure
 */

#define	XFS_DIR2_BLOCK_MAGIC	0x58443242	/* XD2B: for one block dirs */

typedef struct xfs_dir2_block_tail {
	__uint32_t	count;			/* count of leaf entries */
	__uint32_t	stale;			/* count of stale lf entries */
} xfs_dir2_block_tail_t;

/*
 * Generic single-block structure, for xfs_db.
 */
typedef struct xfs_dir2_block {
	xfs_dir2_data_hdr_t	hdr;		/* magic XFS_DIR2_BLOCK_MAGIC */
	xfs_dir2_data_union_t	u[1];
	xfs_dir2_leaf_entry_t	leaf[1];
	xfs_dir2_block_tail_t	tail;
} xfs_dir2_block_t;

/*
 * Pointer to the leaf header embedded in a data block (1-block format)
 */
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BLOCK_TAIL_P)
xfs_dir2_block_tail_t *
xfs_dir2_block_tail_p(struct xfs_mount *mp, xfs_dir2_block_t *block);
#define	XFS_DIR2_BLOCK_TAIL_P(mp,block)	xfs_dir2_block_tail_p(mp,block) 
#else
#define	XFS_DIR2_BLOCK_TAIL_P(mp,block)	\
	(((xfs_dir2_block_tail_t *)((char *)(block) + (mp)->m_dirblksize)) - 1)
#endif

/*
 * Pointer to the leaf entries embedded in a data block (1-block format)
 */
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BLOCK_LEAF_P)
struct xfs_dir2_leaf_entry *xfs_dir2_block_leaf_p(xfs_dir2_block_tail_t *btp);
#define	XFS_DIR2_BLOCK_LEAF_P(btp)	xfs_dir2_block_leaf_p(btp)
#else
#define	XFS_DIR2_BLOCK_LEAF_P(btp)	\
	(((struct xfs_dir2_leaf_entry *)(btp)) - (btp)->count)
#endif

/*
 * Function declarations.
 */

extern int
	xfs_dir2_block_addname(struct xfs_da_args *args);

#ifndef SIM
extern int
	xfs_dir2_block_getdents(struct xfs_trans *tp, struct xfs_inode *dp,
				struct uio *uio, int *eofp, struct dirent *dbp,
				xfs_dir2_put_t put);
#endif

extern int
	xfs_dir2_block_lookup(struct xfs_da_args *args);

#if defined(XFS_REPAIR_SIM) || !defined(SIM)
extern int
	xfs_dir2_block_removename(struct xfs_da_args *args);

extern int
	xfs_dir2_block_replace(struct xfs_da_args *args);
#endif /* XFS_REPAIR_SIM || !SIM */

#if defined(XFS_REPAIR_SIM) || !defined(SIM)
extern int
	xfs_dir2_leaf_to_block(struct xfs_da_args *args, struct xfs_dabuf *lbp,
			       struct xfs_dabuf *dbp);
#endif /* XFS_REPAIR_SIM || !SIM */

extern int
	xfs_dir2_sf_to_block(struct xfs_da_args *args);

#endif	/* !_FS_XFS_DIR2_BLOCK_H */