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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_SF_H
#define	_FS_XFS_DIR2_SF_H

#ident	"$Revision: 1.2 $"

/*
 * xfs_dir2_sf.h
 *
 * Directory layout when stored internal to an inode.
 *
 * Small directories are packed as tightly as possible so as to
 * fit into the literal area of the inode.
 */

struct dirent;
struct uio;
struct xfs_dabuf;
struct xfs_da_args;
struct xfs_dir2_block;
struct xfs_inode;
struct xfs_mount;
struct xfs_trans;

/*
 * Maximum size of a shortform directory.
 */
#define	XFS_DIR2_SF_MAX_SIZE	\
	(XFS_DINODE_MAX_SIZE - (uint)sizeof(xfs_dinode_core_t) - \
	 (uint)sizeof(xfs_agino_t))

/*
 * Inode number stored as 8 8-bit values.
 */
typedef	struct { __uint8_t i[8]; } xfs_dir2_ino8_t;

#if XFS_BIG_FILESYSTEMS
#define	XFS_DIR2_SF_GET_INO8(di)	\
	(((xfs_intino_t)XFS_DI_LO((di).i8) & 0xffffffffULL) | \
	 ((xfs_intino_t)XFS_DI_HI((di).i8) << 32))
#else
#define	XFS_DIR2_SF_GET_INO8(di)	XFS_DI_LO((di).i8)
#endif

/*
 * Inode number stored as 4 8-bit values.
 * Works a lot of the time, when all the inode numbers in a directory
 * fit in 32 bits.
 */
typedef struct { __uint8_t i[4]; } xfs_dir2_ino4_t;
#ifdef __LITTLE_ENDIAN
#define	XFS_DIR2_SF_GET_INO4(di)	\
	((uint)((di).i4.i[3] << 24) | (uint)((di).i4.i[2] << 16) | \
	 (uint)((di).i4.i[1] << 8) | (uint)((di).i4.i[0]))
#else
#define	XFS_DIR2_SF_GET_INO4(di)	\
	((uint)((di).i4.i[0] << 24) | (uint)((di).i4.i[1] << 16) | \
	 (uint)((di).i4.i[2] << 8) | (uint)((di).i4.i[3]))
#endif

typedef union {
	xfs_dir2_ino8_t	i8;
	xfs_dir2_ino4_t	i4;
} xfs_dir2_inou_t;
#define	XFS_DIR2_MAX_SHORT_INUM	((xfs_ino_t)0xffffffffULL)

/*
 * Normalized offset (in a data block) of the entry, really xfs_dir2_data_off_t.
 * Only need 16 bits, this is the byte offset into the single block form.
 */
typedef struct { __uint8_t i[2]; } xfs_dir2_sf_off_t;

/*
 * The parent directory has a dedicated field, and the self-pointer must
 * be calculated on the fly.
 *
 * Entries are packed toward the top as tightly as possible.  The header
 * and the elements must be bcopy()'d out into a work area to get correct
 * alignment for the inode number fields.
 */
typedef struct xfs_dir2_sf_hdr {
	__uint8_t		count;		/* count of entries */
	__uint8_t		i8count;	/* count of 8-byte inode #s */
	xfs_dir2_inou_t		parent;		/* parent dir inode number */
} xfs_dir2_sf_hdr_t;

typedef struct xfs_dir2_sf_entry {
	__uint8_t		namelen;	/* actual name length */
	xfs_dir2_sf_off_t	offset;		/* saved offset */
	__uint8_t		name[1];	/* name, variable size */
	xfs_dir2_inou_t		inumber;	/* inode number, var. offset */
} xfs_dir2_sf_entry_t;

typedef struct xfs_dir2_sf {
	xfs_dir2_sf_hdr_t	hdr;		/* shortform header */
	xfs_dir2_sf_entry_t	list[1];	/* shortform entries */
} xfs_dir2_sf_t;

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_HDR_SIZE)
int xfs_dir2_sf_hdr_size(int i8count);
#define	XFS_DIR2_SF_HDR_SIZE(i8count)	xfs_dir2_sf_hdr_size(i8count)
#else
#define	XFS_DIR2_SF_HDR_SIZE(i8count)	\
	((uint)sizeof(xfs_dir2_sf_hdr_t) - \
	 ((i8count) == 0) * \
	 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_INUMBERP)
xfs_dir2_inou_t *xfs_dir2_sf_inumberp(xfs_dir2_sf_entry_t *sfep);
#define	XFS_DIR2_SF_INUMBERP(sfep)	xfs_dir2_sf_inumberp(sfep)
#else
#define	XFS_DIR2_SF_INUMBERP(sfep)	\
	((xfs_dir2_inou_t *)&(sfep)->name[(sfep)->namelen])
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_GET_INUMBER)
xfs_intino_t xfs_dir2_sf_get_inumber(xfs_dir2_sf_t *sfp, xfs_dir2_inou_t *from);
#define	XFS_DIR2_SF_GET_INUMBER(sfp, from)	\
	xfs_dir2_sf_get_inumber(sfp, from)
#else
#define	XFS_DIR2_SF_GET_INUMBER(sfp, from)	\
	((sfp)->hdr.i8count == 0 ? \
		(xfs_intino_t)XFS_DIR2_SF_GET_INO4(*(from)) : \
		(xfs_intino_t)XFS_DIR2_SF_GET_INO8(*(from)))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_PUT_INUMBER)
void xfs_dir2_sf_put_inumber(xfs_dir2_sf_t *sfp, xfs_ino_t *from,
			     xfs_dir2_inou_t *to);
#define	XFS_DIR2_SF_PUT_INUMBER(sfp,from,to)	\
	xfs_dir2_sf_put_inumber(sfp,from,to)
#else
#ifdef __LITTLE_ENDIAN
#define	XFS_DIR2_SF_PUT_INUMBER(sfp,from,to)	\
	((sfp)->hdr.i8count == 0 ? \
		(void)((to)->i4 = *(xfs_dir2_ino4_t *)((char *)(from))) : \
		(void)((to)->i8 = *(xfs_dir2_ino8_t *)(from)))
#else
#define	XFS_DIR2_SF_PUT_INUMBER(sfp,from,to)	\
	((sfp)->hdr.i8count == 0 ? \
		(void)((to)->i4 = *(xfs_dir2_ino4_t *)(((char *)(from))+4)) : \
		(void)((to)->i8 = *(xfs_dir2_ino8_t *)(from)))
#endif
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_GET_OFFSET)
xfs_dir2_data_aoff_t xfs_dir2_sf_get_offset(xfs_dir2_sf_entry_t *sfep);
#define	XFS_DIR2_SF_GET_OFFSET(sfep)	xfs_dir2_sf_get_offset(sfep)
#else
#ifdef __LITTLE_ENDIAN
#define	XFS_DIR2_SF_GET_OFFSET(sfep)	\
	(((sfep)->offset.i[1] << 8) | ((sfep)->offset.i[0]))
#else
#define	XFS_DIR2_SF_GET_OFFSET(sfep)	\
	(((sfep)->offset.i[0] << 8) | ((sfep)->offset.i[1]))
#endif
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_PUT_OFFSET)
void xfs_dir2_sf_put_offset(xfs_dir2_sf_entry_t *sfep,
			    xfs_dir2_data_aoff_t off);
#define	XFS_DIR2_SF_PUT_OFFSET(sfep,off)	xfs_dir2_sf_put_offset(sfep,off)
#else
#ifdef __LITTLE_ENDIAN
#define	XFS_DIR2_SF_PUT_OFFSET(sfep,off)	\
	((sfep)->offset.i[0] = ((off) >> 0) & 0xff, \
	 (sfep)->offset.i[1] = ((off) >> 8) & 0xff)
#else
#define	XFS_DIR2_SF_PUT_OFFSET(sfep,off)	\
	((sfep)->offset.i[0] = ((off) >> 8) & 0xff, \
	 (sfep)->offset.i[1] = ((off) >> 0) & 0xff)
#endif
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_ENTSIZE_BYNAME)
int xfs_dir2_sf_entsize_byname(xfs_dir2_sf_t *sfp, int len);
#define XFS_DIR2_SF_ENTSIZE_BYNAME(sfp,len)	\
	xfs_dir2_sf_entsize_byname(sfp,len)
#else
#define XFS_DIR2_SF_ENTSIZE_BYNAME(sfp,len)	/* space a name uses */ \
	((uint)sizeof(xfs_dir2_sf_entry_t) - 1 + (len) - \
	 ((sfp)->hdr.i8count == 0) * \
	 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_ENTSIZE_BYENTRY)
int xfs_dir2_sf_entsize_byentry(xfs_dir2_sf_t *sfp, xfs_dir2_sf_entry_t *sfep);
#define XFS_DIR2_SF_ENTSIZE_BYENTRY(sfp,sfep)	\
	xfs_dir2_sf_entsize_byentry(sfp,sfep)
#else
#define XFS_DIR2_SF_ENTSIZE_BYENTRY(sfp,sfep)	/* space an entry uses */ \
	((uint)sizeof(xfs_dir2_sf_entry_t) - 1 + (sfep)->namelen - \
	 ((sfp)->hdr.i8count == 0) * \
	 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_FIRSTENTRY)
xfs_dir2_sf_entry_t *xfs_dir2_sf_firstentry(xfs_dir2_sf_t *sfp);
#define XFS_DIR2_SF_FIRSTENTRY(sfp)	xfs_dir2_sf_firstentry(sfp)
#else
#define XFS_DIR2_SF_FIRSTENTRY(sfp)	/* first entry in struct */ \
	((xfs_dir2_sf_entry_t *) \
	 ((char *)(sfp) + XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count)))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_NEXTENTRY)
xfs_dir2_sf_entry_t *xfs_dir2_sf_nextentry(xfs_dir2_sf_t *sfp,
					   xfs_dir2_sf_entry_t *sfep);
#define XFS_DIR2_SF_NEXTENTRY(sfp,sfep)		xfs_dir2_sf_nextentry(sfp,sfep)
#else
#define XFS_DIR2_SF_NEXTENTRY(sfp,sfep)		/* next entry in struct */ \
	((xfs_dir2_sf_entry_t *) \
		((char *)(sfep) + XFS_DIR2_SF_ENTSIZE_BYENTRY(sfp,sfep)))
#endif

/*
 * Functions.
 */

extern int
	xfs_dir2_block_sfsize(struct xfs_inode *dp,
			      struct xfs_dir2_block *block,
			      xfs_dir2_sf_hdr_t *sfhp);

#if defined(XFS_REPAIR_SIM) || !defined(SIM)
extern int
	xfs_dir2_block_to_sf(struct xfs_da_args *args, struct xfs_dabuf *bp,
			     int size, xfs_dir2_sf_hdr_t *sfhp);
#endif /* XFS_REPAIR_SIM || !SIM */

extern int
	xfs_dir2_sf_addname(struct xfs_da_args *args);

extern int
	xfs_dir2_sf_create(struct xfs_da_args *args, xfs_ino_t pino);

#ifndef SIM
extern int
	xfs_dir2_sf_getdents(struct xfs_inode *dp, struct uio *uio, int *eofp,
			     struct dirent *dbp, xfs_dir2_put_t put);
#endif /* !SIM */

extern int
	xfs_dir2_sf_lookup(struct xfs_da_args *args);

#if defined(XFS_REPAIR_SIM) || !defined(SIM)
extern int
	xfs_dir2_sf_removename(struct xfs_da_args *args);

extern int
	xfs_dir2_sf_replace(struct xfs_da_args *args);
#endif /* XFS_REPAIR_SIM || !SIM */

#endif	/* !_FS_XFS_DIR2_SF_H */