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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: 1.7 $"

/*
 * xfs_dir2_sf.c
 * Shortform directory implementation for v2 directories.
 */
#if defined(__linux__)
#include <xfs_linux.h>
#endif


#ifdef SIM
#define _KERNEL 1
#endif
#include <sys/param.h>
#include "xfs_buf.h"
#include <sys/debug.h>
#include <sys/uuid.h>
#ifdef SIM
#undef _KERNEL
#endif
#include <sys/errno.h>
#include <sys/vnode.h>
#include <sys/kmem.h>
#include <sys/dirent.h>
#include <stddef.h>
#ifdef SIM
#include <bstring.h>
#else
#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_dir2.h"
#include "xfs_mount.h"
#include "xfs_bmap_btree.h"
#include "xfs_attr_sf.h"
#include "xfs_dir_sf.h"
#include "xfs_dir2_sf.h"
#include "xfs_dinode.h"
#include "xfs_inode_item.h"
#include "xfs_inode.h"
#include "xfs_da_btree.h"
#include "xfs_dir_leaf.h"
#include "xfs_error.h"
#include "xfs_dir2_data.h"
#include "xfs_dir2_leaf.h"
#include "xfs_dir2_block.h"
#include "xfs_dir2_trace.h"
#ifdef SIM
#include "sim.h"
#endif

/*
 * Prototypes for internal functions.
 */
static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args,
				     xfs_dir2_sf_entry_t *sfep,
				     xfs_dir2_data_aoff_t offset,
				     int new_isize);
static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange,
				     int new_isize);
static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange,
				    xfs_dir2_sf_entry_t **sfepp,
				    xfs_dir2_data_aoff_t *offsetp);
#ifdef DEBUG
static void xfs_dir2_sf_check(xfs_da_args_t *args);
#else
#define	xfs_dir2_sf_check(args)
#endif /* DEBUG */
#if XFS_BIG_FILESYSTEMS
#if defined(XFS_REPAIR_SIM) || !defined(SIM)
static void xfs_dir2_sf_toino4(xfs_da_args_t *args);
#endif /* XFS_REPAIR_SIM || !SIM */
static void xfs_dir2_sf_toino8(xfs_da_args_t *args);
#endif /* XFS_BIG_FILESYSTEMS */

#if defined(XFS_REPAIR_SIM) || !defined(SIM)
/*
 * Given a block directory (dp/block), calculate its size as a shortform (sf)
 * directory and a header for the sf directory, if it will fit it the
 * space currently present in the inode.  If it won't fit, the output
 * size is too big (but not accurate).
 */
int						/* size for sf form */
xfs_dir2_block_sfsize(
	xfs_inode_t		*dp,		/* incore inode pointer */
	xfs_dir2_block_t	*block,		/* block directory data */
	xfs_dir2_sf_hdr_t	*sfhp)		/* output: header for sf form */
{
	xfs_dir2_dataptr_t	addr;		/* data entry address */
	xfs_dir2_leaf_entry_t	*blp;		/* leaf area of the block */
	xfs_dir2_block_tail_t	*btp;		/* tail area of the block */
	int			count;		/* shortform entry count */
	xfs_dir2_data_entry_t	*dep;		/* data entry in the block */
	int			i;		/* block entry index */
	int			i8count;	/* count of big-inode entries */
	int			isdot;		/* entry is "." */
	int			isdotdot;	/* entry is ".." */
	xfs_mount_t		*mp;		/* mount structure pointer */
	int			namelen;	/* total name bytes */
	xfs_ino_t		parent;		/* parent inode number */
	int			size;		/* total computed size */

	mp = dp->i_mount;
	count = i8count = namelen = 0;
	btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
	blp = XFS_DIR2_BLOCK_LEAF_P(btp);
	/*
	 * Iterate over the block's data entries by using the leaf pointers.
	 */
	for (i = 0; i < btp->count; i++) {
		if ((addr = blp[i].address) == XFS_DIR2_NULL_DATAPTR)
			continue;
		/*
		 * Calculate the pointer to the entry at hand.
		 */
		dep = (xfs_dir2_data_entry_t *)
		      ((char *)block + XFS_DIR2_DATAPTR_TO_OFF(mp, addr));
		/*
		 * Detect . and .., so we can special-case them.
		 * . is not included in sf directories.
		 * .. is included by just the parent inode number.
		 */
		isdot = dep->namelen == 1 && dep->name[0] == '.';
		isdotdot =
			dep->namelen == 2 &&
			dep->name[0] == '.' && dep->name[1] == '.';
#if XFS_BIG_FILESYSTEMS
		if (!isdot)
			i8count += dep->inumber > XFS_DIR2_MAX_SHORT_INUM;
#endif
		if (!isdot && !isdotdot) {
			count++;
			namelen += dep->namelen;
		} else if (isdotdot)
			parent = dep->inumber;
		/*
		 * Calculate the new size, see if we should give up yet.
		 */
		size = XFS_DIR2_SF_HDR_SIZE(i8count) +		/* header */
		       count +					/* namelen */
		       count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */
		       namelen +				/* name */
		       (i8count ?				/* inumber */
				(uint)sizeof(xfs_dir2_ino8_t) * count :
				(uint)sizeof(xfs_dir2_ino4_t) * count);
		if (size > XFS_IFORK_DSIZE(dp))
			return size;		/* size value is a failure */
	}
	/*
	 * Create the output header, if it worked.
	 */
	sfhp->count = count;
	sfhp->i8count = i8count;
	XFS_DIR2_SF_PUT_INUMBER((xfs_dir2_sf_t *)sfhp, &parent, &sfhp->parent);
	return size;
}

/*
 * Convert a block format directory to shortform.
 * Caller has already checked that it will fit, and built us a header.
 */
int						/* error */
xfs_dir2_block_to_sf(
	xfs_da_args_t		*args,		/* operation arguments */
	xfs_dabuf_t		*bp,		/* block buffer */
	int			size,		/* shortform directory size */
	xfs_dir2_sf_hdr_t	*sfhp)		/* shortform directory hdr */
{
	xfs_dir2_block_t	*block;		/* block structure */
	xfs_dir2_block_tail_t	*btp;		/* block tail pointer */
	xfs_dir2_data_entry_t	*dep;		/* data entry pointer */
	xfs_inode_t		*dp;		/* incore directory inode */
	xfs_dir2_data_unused_t	*dup;		/* unused data pointer */
	char			*endptr;	/* end of data entries */
	int			error;		/* error return value */
	int			logflags;	/* inode logging flags */
	xfs_mount_t		*mp;		/* filesystem mount point */
	char			*ptr;		/* current data pointer */
	xfs_dir2_sf_entry_t	*sfep;		/* shortform entry */
	xfs_dir2_sf_t		*sfp;		/* shortform structure */

	xfs_dir2_trace_args_sb("block_to_sf", args, size, bp);
	dp = args->dp;
	mp = dp->i_mount;
	/*
	 * Make a copy of the block data, so we can shrink the inode
	 * and add local data.
	 */
	block = kmem_alloc(mp->m_dirblksize, KM_SLEEP);
	bcopy(bp->data, block, mp->m_dirblksize);
	logflags = XFS_ILOG_CORE;
	if (error = xfs_dir2_shrink_inode(args, mp->m_dirdatablk, bp)) {
#pragma mips_frequency_hint NEVER
		ASSERT(error != ENOSPC);
		goto out;
	}
	/*
	 * The buffer is now unconditionally gone, whether
	 * xfs_dir2_shrink_inode worked or not.
	 *
	 * Convert the inode to local format.
	 */
	dp->i_df.if_flags &= ~XFS_IFEXTENTS;
	dp->i_df.if_flags |= XFS_IFINLINE;
	dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
	ASSERT(dp->i_df.if_bytes == 0);
	xfs_idata_realloc(dp, size, XFS_DATA_FORK);
	logflags |= XFS_ILOG_DDATA;
	/*
	 * Copy the header into the newly allocate local space.
	 */
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	bcopy(sfhp, sfp, XFS_DIR2_SF_HDR_SIZE(sfhp->i8count));
	dp->i_d.di_size = size;
	/*
	 * Set up to loop over the block's entries.
	 */
	btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
	ptr = (char *)block->u;
	endptr = (char *)XFS_DIR2_BLOCK_LEAF_P(btp);
	sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
	/*
	 * Loop over the active and unused entries.
	 * Stop when we reach the leaf/tail portion of the block.
	 */
	while (ptr < endptr) {
		/*
		 * If it's unused, just skip over it.
		 */
		dup = (xfs_dir2_data_unused_t *)ptr;
		if (dup->freetag == XFS_DIR2_DATA_FREE_TAG) {
			ptr += dup->length;
			continue;
		}
		dep = (xfs_dir2_data_entry_t *)ptr;
		/*
		 * Skip .
		 */
		if (dep->namelen == 1 && dep->name[0] == '.')
			ASSERT(dep->inumber == dp->i_ino);
		/*
		 * Skip .., but make sure the inode number is right.
		 */
		else if (dep->namelen == 2 &&
			 dep->name[0] == '.' && dep->name[1] == '.')
			ASSERT(dep->inumber ==
			       XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent));
		/*
		 * Normal entry, copy it into shortform.
		 */
		else {
			sfep->namelen = dep->namelen;
			XFS_DIR2_SF_PUT_OFFSET(sfep,
				(xfs_dir2_data_aoff_t)
				((char *)dep - (char *)block));
			bcopy(dep->name, sfep->name, dep->namelen);
			XFS_DIR2_SF_PUT_INUMBER(sfp, &dep->inumber,
				XFS_DIR2_SF_INUMBERP(sfep));
			sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep);
		}
		ptr += XFS_DIR2_DATA_ENTSIZE(dep->namelen);
	}
	ASSERT((char *)sfep - (char *)sfp == size);
	xfs_dir2_sf_check(args);
out:
	xfs_trans_log_inode(args->trans, dp, logflags);
	kmem_free(block, mp->m_dirblksize);
	return error;
}
#endif /* XFS_REPAIR_SIM || !SIM */

/*
 * Add a name to a shortform directory.
 * There are two algorithms, "easy" and "hard" which we decide on 
 * before changing anything.
 * Convert to block form if necessary, if the new entry won't fit.
 */
int						/* error */
xfs_dir2_sf_addname(
	xfs_da_args_t		*args)		/* operation arguments */
{
	int			add_entsize;	/* size of the new entry */
	xfs_inode_t		*dp;		/* incore directory inode */
	int			error;		/* error return value */
	int			incr_isize;	/* total change in size */
	int			new_isize;	/* di_size after adding name */
	int			objchange;	/* changing to 8-byte inodes */
	xfs_dir2_data_aoff_t	offset;		/* offset for new entry */
	int			old_isize;	/* di_size before adding name */
	int			pick;		/* which algorithm to use */
	xfs_dir2_sf_t		*sfp;		/* shortform structure */
	xfs_dir2_sf_entry_t	*sfep;		/* shortform entry */

	xfs_dir2_trace_args("sf_addname", args);
	ASSERT(xfs_dir2_sf_lookup(args) == ENOENT);
	dp = args->dp;
	ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
	/*
	 * Make sure the shortform value has some of its header.
	 */
	if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
#pragma mips_frequency_hint NEVER
		ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
		return XFS_ERROR(EIO);
	}
	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
	ASSERT(dp->i_df.if_u1.if_data != NULL);
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
	/*
	 * Compute entry (and change in) size.
	 */
	add_entsize = XFS_DIR2_SF_ENTSIZE_BYNAME(sfp, args->namelen);
	incr_isize = add_entsize;
#if XFS_BIG_FILESYSTEMS
	/*
	 * Do we have to change to 8 byte inodes?
	 */
	if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->hdr.i8count == 0) {
#pragma mips_frequency_hint NEVER
		/*
		 * Yes, adjust the entry size and the total size.
		 */
		add_entsize +=
			(uint)sizeof(xfs_dir2_ino8_t) -
			(uint)sizeof(xfs_dir2_ino4_t);
		incr_isize +=
			(sfp->hdr.count + 2) *
			((uint)sizeof(xfs_dir2_ino8_t) -
			 (uint)sizeof(xfs_dir2_ino4_t));
		objchange = 1;
	} else
		objchange = 0;
#else
	objchange = 0;
#endif
	old_isize = (int)dp->i_d.di_size;
	new_isize = old_isize + incr_isize;
	/*
	 * Won't fit as shortform any more (due to size),
	 * or the pick routine says it won't (due to offset values).
	 */
	if (new_isize > XFS_IFORK_DSIZE(dp) ||
	    (pick =
	     xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) {
#pragma mips_frequency_hint NEVER
		/*
		 * Just checking or no space reservation, it doesn't fit.
		 */
		if (args->justcheck || args->total == 0)
			return XFS_ERROR(ENOSPC);
		/*
		 * Convert to block form then add the name.
		 */
		error = xfs_dir2_sf_to_block(args);
		if (error)
			return error;
		return xfs_dir2_block_addname(args);
	}
	/*
	 * Just checking, it fits.
	 */
	if (args->justcheck)
		return 0;
	/*
	 * Do it the easy way - just add it at the end.
	 */
	if (pick == 1)
		xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize);
	/*
	 * Do it the hard way - look for a place to insert the new entry.
	 * Convert to 8 byte inode numbers first if necessary.
	 */
	else {
		ASSERT(pick == 2);
#if XFS_BIG_FILESYSTEMS
		if (objchange)
			xfs_dir2_sf_toino8(args);
#endif
		xfs_dir2_sf_addname_hard(args, objchange, new_isize);
	}
	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
	return 0;
}

/*
 * Add the new entry the "easy" way.
 * This is copying the old directory and adding the new entry at the end.
 * Since it's sorted by "offset" we need room after the last offset
 * that's already there, and then room to convert to a block directory.
 * This is already checked by the pick routine.
 */
static void
xfs_dir2_sf_addname_easy(
	xfs_da_args_t		*args,		/* operation arguments */
	xfs_dir2_sf_entry_t	*sfep,		/* pointer to new entry */
	xfs_dir2_data_aoff_t	offset,		/* offset to use for new ent */
	int			new_isize)	/* new directory size */
{
	int			byteoff;	/* byte offset in sf dir */
	xfs_inode_t		*dp;		/* incore directory inode */
	xfs_dir2_sf_t		*sfp;		/* shortform structure */

	dp = args->dp;
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	byteoff = (int)((char *)sfep - (char *)sfp);
	/*
	 * Grow the in-inode space.
	 */
	xfs_idata_realloc(dp, XFS_DIR2_SF_ENTSIZE_BYNAME(sfp, args->namelen),
		XFS_DATA_FORK);
	/*
	 * Need to set up again due to realloc of the inode data.
	 */
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff);
	/*
	 * Fill in the new entry.
	 */
	sfep->namelen = args->namelen;
	XFS_DIR2_SF_PUT_OFFSET(sfep, offset);
	bcopy(args->name, sfep->name, sfep->namelen);
	XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber,
		XFS_DIR2_SF_INUMBERP(sfep));
	/*
	 * Update the header and inode.
	 */
	sfp->hdr.count++;
#if XFS_BIG_FILESYSTEMS
	if (args->inumber > XFS_DIR2_MAX_SHORT_INUM)
		sfp->hdr.i8count++;
#endif
	dp->i_d.di_size = new_isize;
	xfs_dir2_sf_check(args);
}

/*
 * Add the new entry the "hard" way.
 * The caller has already converted to 8 byte inode numbers if necessary,
 * in which case we need to leave the i8count at 1.
 * Find a hole that the new entry will fit into, and copy
 * the first part of the entries, the new entry, and the last part of
 * the entries.
 */
/* ARGSUSED */
static void
xfs_dir2_sf_addname_hard(
	xfs_da_args_t		*args,		/* operation arguments */
	int			objchange,	/* changing inode number size */
	int			new_isize)	/* new directory size */
{
	int			add_datasize;	/* data size need for new ent */
	char			buf[XFS_DIR2_SF_MAX_SIZE]; /* buffer for old */
	xfs_inode_t		*dp;		/* incore directory inode */
	int			eof;		/* reached end of old dir */
	int			nbytes;		/* temp for byte copies */
	xfs_dir2_data_aoff_t	new_offset;	/* next offset value */
	xfs_dir2_data_aoff_t	offset;		/* current offset value */
	int			old_isize;	/* previous di_size */
	xfs_dir2_sf_entry_t	*oldsfep;	/* entry in original dir */
	xfs_dir2_sf_t		*oldsfp;	/* original shortform dir */
	xfs_dir2_sf_entry_t	*sfep;		/* entry in new dir */
	xfs_dir2_sf_t		*sfp;		/* new shortform dir */

	/*
	 * Copy the old directory to the stack buffer.
	 */
	dp = args->dp;
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	old_isize = (int)dp->i_d.di_size;
	oldsfp = (xfs_dir2_sf_t *)buf;
	bcopy(sfp, oldsfp, old_isize);
	/*
	 * Loop over the old directory finding the place we're going
	 * to insert the new entry.
	 * If it's going to end up at the end then oldsfep will point there.
	 */
	for (offset = XFS_DIR2_DATA_FIRST_OFFSET,
	      oldsfep = XFS_DIR2_SF_FIRSTENTRY(oldsfp),
	      add_datasize = XFS_DIR2_DATA_ENTSIZE(args->namelen),
	      eof = (char *)oldsfep == &buf[old_isize];
	     !eof;
	     offset = new_offset + XFS_DIR2_DATA_ENTSIZE(oldsfep->namelen),
	      oldsfep = XFS_DIR2_SF_NEXTENTRY(oldsfp, oldsfep),
	      eof = (char *)oldsfep == &buf[old_isize]) {
		new_offset = XFS_DIR2_SF_GET_OFFSET(oldsfep);
		if (offset + add_datasize <= new_offset)
			break;
	}
	/*
	 * Get rid of the old directory, then allocate space for
	 * the new one.  We do this so xfs_idata_realloc won't copy
	 * the data.
	 */
	xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK);
	xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK);
	/*
	 * Reset the pointer since the buffer was reallocated.
	 */
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	/*
	 * Copy the first part of the directory, including the header.
	 */
	nbytes = (int)((char *)oldsfep - (char *)oldsfp);
	bcopy(oldsfp, sfp, nbytes);
	sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes);
	/*
	 * Fill in the new entry, and update the header counts.
	 */
	sfep->namelen = args->namelen;
	XFS_DIR2_SF_PUT_OFFSET(sfep, offset);
	bcopy(args->name, sfep->name, sfep->namelen);
	XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber,
		XFS_DIR2_SF_INUMBERP(sfep));
	sfp->hdr.count++;
#if XFS_BIG_FILESYSTEMS
	if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
		sfp->hdr.i8count++;
#endif
	/*
	 * If there's more left to copy, do that.
	 */
	if (!eof) {
		sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep);
		bcopy(oldsfep, sfep, old_isize - nbytes);
	}
	dp->i_d.di_size = new_isize;
	xfs_dir2_sf_check(args);
}

/*
 * Decide if the new entry will fit at all.
 * If it will fit, pick between adding the new entry to the end (easy)
 * or somewhere else (hard).
 * Return 0 (won't fit), 1 (easy), 2 (hard).
 */
/*ARGSUSED*/
static int					/* pick result */
xfs_dir2_sf_addname_pick(
	xfs_da_args_t		*args,		/* operation arguments */
	int			objchange,	/* inode # size changes */
	xfs_dir2_sf_entry_t	**sfepp,	/* out(1): new entry ptr */
	xfs_dir2_data_aoff_t	*offsetp)	/* out(1): new offset */
{
	xfs_inode_t		*dp;		/* incore directory inode */
	int			holefit;	/* found hole it will fit in */
	int			i;		/* entry number */
	xfs_mount_t		*mp;		/* filesystem mount point */
	xfs_dir2_data_aoff_t	offset;		/* data block offset */
	xfs_dir2_sf_entry_t	*sfep;		/* shortform entry */
	xfs_dir2_sf_t		*sfp;		/* shortform structure */
	int			size;		/* entry's data size */
	int			used;		/* data bytes used */

	dp = args->dp;
	mp = dp->i_mount;
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	size = XFS_DIR2_DATA_ENTSIZE(args->namelen);
	offset = XFS_DIR2_DATA_FIRST_OFFSET;
	sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
	holefit = 0;
	/*
	 * Loop over sf entries.
	 * Keep track of data offset and whether we've seen a place
	 * to insert the new entry.
	 */
	for (i = 0; i < sfp->hdr.count; i++) {
		if (!holefit)
			holefit = offset + size <= XFS_DIR2_SF_GET_OFFSET(sfep);
		offset = XFS_DIR2_SF_GET_OFFSET(sfep) +
			 XFS_DIR2_DATA_ENTSIZE(sfep->namelen);
		sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep);
	}
	/*
	 * Calculate data bytes used excluding the new entry, if this
	 * was a data block (block form directory).
	 */
	used = offset +
	       (sfp->hdr.count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
	       (uint)sizeof(xfs_dir2_block_tail_t);
	/*
	 * If it won't fit in a block form then we can't insert it,
	 * we'll go back, convert to block, then try the insert and convert
	 * to leaf.
	 */
	if (used + (holefit ? 0 : size) > mp->m_dirblksize)
		return 0;
	/*
	 * If changing the inode number size, do it the hard way.
	 */
#if XFS_BIG_FILESYSTEMS
	if (objchange) {
#pragma mips_frequency_hint NEVER
		return 2;
	}
#else
	ASSERT(objchange == 0);
#endif
	/*
	 * If it won't fit at the end then do it the hard way (use the hole).
	 */
	if (used + size > mp->m_dirblksize)
		return 2;
	/*
	 * Do it the easy way.
	 */
	*sfepp = sfep;
	*offsetp = offset;
	return 1;
}

#ifdef DEBUG
/*
 * Check consistency of shortform directory, assert if bad.
 */
static void
xfs_dir2_sf_check(
	xfs_da_args_t		*args)		/* operation arguments */
{
	xfs_inode_t		*dp;		/* incore directory inode */
	int			i;		/* entry number */
	int			i8count;	/* number of big inode#s */
	xfs_ino_t		ino;		/* entry inode number */
	int			offset;		/* data offset */
	xfs_dir2_sf_entry_t	*sfep;		/* shortform dir entry */
	xfs_dir2_sf_t		*sfp;		/* shortform structure */

	dp = args->dp;
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	offset = XFS_DIR2_DATA_FIRST_OFFSET;
	ino = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent);
	i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
	for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
	     i < sfp->hdr.count;
	     i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
		ASSERT(XFS_DIR2_SF_GET_OFFSET(sfep) >= offset);
		ino = XFS_DIR2_SF_GET_INUMBER(sfp, XFS_DIR2_SF_INUMBERP(sfep));
		i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
		offset =
			XFS_DIR2_SF_GET_OFFSET(sfep) +
			XFS_DIR2_DATA_ENTSIZE(sfep->namelen);
	}
	ASSERT(i8count == sfp->hdr.i8count);
#if !XFS_BIG_FILESYSTEMS
	ASSERT(i8count == 0);
#endif
	ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size);
	ASSERT(offset +
	       (sfp->hdr.count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
	       (uint)sizeof(xfs_dir2_block_tail_t) <=
	       dp->i_mount->m_dirblksize);
}
#endif	/* DEBUG */

/* 
 * Create a new (shortform) directory.
 */
int					/* error, always 0 */
xfs_dir2_sf_create(
	xfs_da_args_t	*args,		/* operation arguments */
	xfs_ino_t	pino)		/* parent inode number */
{
	xfs_inode_t	*dp;		/* incore directory inode */
	int		i8count;	/* parent inode is an 8-byte number */
	xfs_dir2_sf_t	*sfp;		/* shortform structure */
	int		size;		/* directory size */

	xfs_dir2_trace_args_i("sf_create", args, pino);
	dp = args->dp;
	ASSERT(dp != NULL);
	ASSERT(dp->i_d.di_size == 0);
	/*
	 * If it's currently a zero-length extent file, 
	 * convert it to local format.
	 */
	if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) {
		dp->i_df.if_flags &= ~XFS_IFEXTENTS;	/* just in case */
		dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
		xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
		dp->i_df.if_flags |= XFS_IFINLINE;
	}
	ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
	ASSERT(dp->i_df.if_bytes == 0);
	i8count = pino > XFS_DIR2_MAX_SHORT_INUM;
	size = XFS_DIR2_SF_HDR_SIZE(i8count);
	/*
	 * Make a buffer for the data.
	 */
	xfs_idata_realloc(dp, size, XFS_DATA_FORK);
	/*
	 * Fill in the header,
	 */
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	sfp->hdr.i8count = i8count;
	/*
	 * Now can put in the inode number, since i8count is set.
	 */
	XFS_DIR2_SF_PUT_INUMBER(sfp, &pino, &sfp->hdr.parent);
	sfp->hdr.count = 0;
	dp->i_d.di_size = size;
	xfs_dir2_sf_check(args);
	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
	return 0;
}

#ifndef SIM
int						/* error */
xfs_dir2_sf_getdents(
	xfs_inode_t		*dp,		/* incore directory inode */
	uio_t			*uio,		/* caller's buffer control */
	int			*eofp,		/* eof reached? (out) */
	dirent_t		*dbp,		/* caller's buffer */
	xfs_dir2_put_t		put)		/* abi's formatting function */
{
	int			error;		/* error return value */
	int			i;		/* shortform entry number */
	xfs_mount_t		*mp;		/* filesystem mount point */
	xfs_dir2_dataptr_t	off;		/* current entry's offset */
	xfs_dir2_put_args_t	p;		/* arg package for put rtn */
	xfs_dir2_sf_entry_t	*sfep;		/* shortform directory entry */
	xfs_dir2_sf_t		*sfp;		/* shortform structure */
	off_t			dir_offset;

	mp = dp->i_mount;
	ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
	/*
	 * Give up if the directory is way too short.
	 */
	if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
#pragma mips_frequency_hint NEVER
		ASSERT(XFS_FORCED_SHUTDOWN(mp));
		return XFS_ERROR(EIO);
	}

	dir_offset = uio->uio_offset;

	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
	ASSERT(dp->i_df.if_u1.if_data != NULL);
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
	/*
	 * If the block number in the offset is out of range, we're done.
	 */
	if (XFS_DIR2_DATAPTR_TO_DB(mp, dir_offset) > mp->m_dirdatablk) {
#pragma mips_frequency_hint NEVER
		*eofp = 1;
		return 0;
	}
	/*
	 * Set up putargs structure.
	 */
	p.dbp = dbp;
	p.put = put;
	p.uio = uio;
	/*
	 * Put . entry unless we're starting past it.
	 */
	if (dir_offset <=
	    XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
				       XFS_DIR2_DATA_DOT_OFFSET)) {
		p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, 0,
				XFS_DIR2_DATA_DOTDOT_OFFSET);
#if XFS_BIG_FILESYSTEMS
		p.ino = dp->i_ino + mp->m_inoadd;
#else
		p.ino = dp->i_ino;
#endif
		p.name = ".";
		p.namelen = 1;
		error = p.put(&p);
		if (!p.done) {
#pragma mips_frequency_hint NEVER
			uio->uio_offset =
				XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
					XFS_DIR2_DATA_DOT_OFFSET);
			return error;
		}
	}
	/*
	 * Put .. entry unless we're starting past it.
	 */
	if (dir_offset <=
	    XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
				       XFS_DIR2_DATA_DOTDOT_OFFSET)) {
		p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
				XFS_DIR2_DATA_FIRST_OFFSET);
#if XFS_BIG_FILESYSTEMS
		p.ino = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent) +
			mp->m_inoadd;
#else
		p.ino = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent);
#endif
		p.name = "..";
		p.namelen = 2;
		error = p.put(&p);
		if (!p.done) {
#pragma mips_frequency_hint NEVER
			uio->uio_offset =
				XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
					XFS_DIR2_DATA_DOTDOT_OFFSET);
			return error;
		}
	}
	/*
	 * Loop while there are more entries and put'ing works.
	 */
	for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
	     i < sfp->hdr.count;
	     i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
		off = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
			XFS_DIR2_SF_GET_OFFSET(sfep));
		if (dir_offset > off)
			continue;
		p.namelen = sfep->namelen;
		p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
			XFS_DIR2_SF_GET_OFFSET(sfep) +
			XFS_DIR2_DATA_ENTSIZE(p.namelen));
#if XFS_BIG_FILESYSTEMS
		p.ino = XFS_DIR2_SF_GET_INUMBER(sfp,
				XFS_DIR2_SF_INUMBERP(sfep)) +
			mp->m_inoadd;
#else
		p.ino = XFS_DIR2_SF_GET_INUMBER(sfp,
				XFS_DIR2_SF_INUMBERP(sfep));
#endif
		p.name = (char *)sfep->name;
		error = p.put(&p);
		if (!p.done) {
#pragma mips_frequency_hint NEVER
			uio->uio_offset = off;
			return error;
		}
	}
	/*
	 * They all fit.
	 */
	*eofp = 1;
	uio->uio_offset =
		XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk + 1, 0);
	return 0;
}
#endif	/* !SIM */

/*
 * Lookup an entry in a shortform directory.
 * Returns EEXIST if found, ENOENT if not found.
 */
int						/* error */
xfs_dir2_sf_lookup(
	xfs_da_args_t		*args)		/* operation arguments */
{
	xfs_inode_t		*dp;		/* incore directory inode */
	int			i;		/* entry index */
	xfs_dir2_sf_entry_t	*sfep;		/* shortform directory entry */
	xfs_dir2_sf_t		*sfp;		/* shortform structure */

	xfs_dir2_trace_args("sf_lookup", args);
	xfs_dir2_sf_check(args);
	dp = args->dp;
	ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
	/*
	 * Bail out if the directory is way too short.
	 */
	if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
#pragma mips_frequency_hint NEVER
		ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
		return XFS_ERROR(EIO);
	}
	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
	ASSERT(dp->i_df.if_u1.if_data != NULL);
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
	/*
	 * Special case for .
	 */
	if (args->namelen == 1 && args->name[0] == '.') {
		args->inumber = dp->i_ino;
		return XFS_ERROR(EEXIST);
	}
	/*
	 * Special case for ..
	 */
	if (args->namelen == 2 &&
	    args->name[0] == '.' && args->name[1] == '.') {
		args->inumber = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent);
		return XFS_ERROR(EEXIST);
	}
	/*
	 * Loop over all the entries trying to match ours.
	 */
	for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
	     i < sfp->hdr.count;
	     i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
		if (sfep->namelen == args->namelen &&
		    sfep->name[0] == args->name[0] &&
		    bcmp(args->name, sfep->name, args->namelen) == 0) {
			args->inumber =
				XFS_DIR2_SF_GET_INUMBER(sfp,
					XFS_DIR2_SF_INUMBERP(sfep));
			return XFS_ERROR(EEXIST);
		}
	}
	/*
	 * Didn't find it.
	 */
	ASSERT(args->oknoent);
	return XFS_ERROR(ENOENT);
}

#if defined(XFS_REPAIR_SIM) || !defined(SIM)
/*
 * Remove an entry from a shortform directory.
 */
int						/* error */
xfs_dir2_sf_removename(
	xfs_da_args_t		*args)
{
	int			byteoff;	/* offset of removed entry */
	xfs_inode_t		*dp;		/* incore directory inode */
	int			entsize;	/* this entry's size */
	int			i;		/* shortform entry index */
	int			newsize;	/* new inode size */
	int			oldsize;	/* old inode size */
	xfs_dir2_sf_entry_t	*sfep;		/* shortform directory entry */
	xfs_dir2_sf_t		*sfp;		/* shortform structure */

	xfs_dir2_trace_args("sf_removename", args);
	dp = args->dp;
	ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
	oldsize = (int)dp->i_d.di_size;
	/*
	 * Bail out if the directory is way too short.
	 */
	if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) {
#pragma mips_frequency_hint NEVER
		ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
		return XFS_ERROR(EIO);
	}
	ASSERT(dp->i_df.if_bytes == oldsize);
	ASSERT(dp->i_df.if_u1.if_data != NULL);
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	ASSERT(oldsize >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
	/*
	 * Loop over the old directory entries.
	 * Find the one we're deleting.
	 */
	for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
	     i < sfp->hdr.count;
	     i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
		if (sfep->namelen == args->namelen &&
		    sfep->name[0] == args->name[0] &&
		    bcmp(sfep->name, args->name, args->namelen) == 0) {
			ASSERT(XFS_DIR2_SF_GET_INUMBER(sfp,
					XFS_DIR2_SF_INUMBERP(sfep)) ==
				args->inumber);
			break;
		}
	}
	/*
	 * Didn't find it.
	 */
	if (i == sfp->hdr.count) {
#pragma mips_frequency_hint NEVER
		return XFS_ERROR(ENOENT);
	}
	/*
	 * Calculate sizes.
	 */
	byteoff = (int)((char *)sfep - (char *)sfp);
	entsize = XFS_DIR2_SF_ENTSIZE_BYNAME(sfp, args->namelen);
	newsize = oldsize - entsize;
	/*
	 * Copy the part if any after the removed entry, sliding it down.
	 */
	if (byteoff + entsize < oldsize)
		ovbcopy((char *)sfp + byteoff + entsize, (char *)sfp + byteoff,
			oldsize - (byteoff + entsize));
	/*
	 * Fix up the header and file size.
	 */
	sfp->hdr.count--;
	dp->i_d.di_size = newsize;
	/*
	 * Reallocate, making it smaller.
	 */
	xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK);
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
#if XFS_BIG_FILESYSTEMS
	/*
	 * Are we changing inode number size?
	 */
	if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
#pragma mips_frequency_hint NEVER
		if (sfp->hdr.i8count == 1)
			xfs_dir2_sf_toino4(args);
		else
			sfp->hdr.i8count--;
	}
#endif
	xfs_dir2_sf_check(args);
	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
	return 0;
}

/*
 * Replace the inode number of an entry in a shortform directory.
 */
int						/* error */
xfs_dir2_sf_replace(
	xfs_da_args_t		*args)		/* operation arguments */
{
	xfs_inode_t		*dp;		/* incore directory inode */
	int			i;		/* entry index */
#if XFS_BIG_FILESYSTEMS || defined(DEBUG)
	xfs_ino_t		ino;		/* entry old inode number */
#endif
	xfs_dir2_sf_entry_t	*sfep;		/* shortform directory entry */
	xfs_dir2_sf_t		*sfp;		/* shortform structure */

	xfs_dir2_trace_args("sf_replace", args);
	dp = args->dp;
	ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
	/*
	 * Bail out if the shortform directory is way too small.
	 */
	if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
#pragma mips_frequency_hint NEVER
		ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
		return XFS_ERROR(EIO);
	}
	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
	ASSERT(dp->i_df.if_u1.if_data != NULL);
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
#if XFS_BIG_FILESYSTEMS
	/*
	 * New inode number is large, and need to convert to 8-byte inodes.
	 */
	if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->hdr.i8count == 0) {
#pragma mips_frequency_hint NEVER
		int	error;			/* error return value */
		int	newsize;		/* new inode size */

		newsize =
			dp->i_df.if_bytes +
			(sfp->hdr.count + 1) *
			((uint)sizeof(xfs_dir2_ino8_t) -
			 (uint)sizeof(xfs_dir2_ino4_t));
		/*
		 * Won't fit as shortform, convert to block then do replace.
		 */
		if (newsize > XFS_IFORK_DSIZE(dp)) {
			error = xfs_dir2_sf_to_block(args);
			if (error) {
				return error;
			}
			return xfs_dir2_block_replace(args);
		}
		/*
		 * Still fits, convert to 8-byte now.
		 */
		xfs_dir2_sf_toino8(args);
		sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	}
#endif
	ASSERT(args->namelen != 1 || args->name[0] != '.');
	/*
	 * Replace ..'s entry.
	 */
	if (args->namelen == 2 &&
	    args->name[0] == '.' && args->name[1] == '.') {
#if XFS_BIG_FILESYSTEMS || defined(DEBUG)
		ino = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent);
		ASSERT(args->inumber != ino);
#endif
		XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber, &sfp->hdr.parent);
	}
	/*
	 * Normal entry, look for the name.
	 */
	else {
		for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
		     i < sfp->hdr.count; 
		     i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
			if (sfep->namelen == args->namelen &&
			    sfep->name[0] == args->name[0] &&
			    bcmp(args->name, sfep->name, args->namelen) == 0) {
#if XFS_BIG_FILESYSTEMS || defined(DEBUG)
				ino = XFS_DIR2_SF_GET_INUMBER(sfp,
					XFS_DIR2_SF_INUMBERP(sfep));
				ASSERT(args->inumber != ino);
#endif
				XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber,
					XFS_DIR2_SF_INUMBERP(sfep));
				break;
			}
		}
		/*
		 * Didn't find it.
		 */
		if (i == sfp->hdr.count) {
#pragma mips_frequency_hint NEVER
			ASSERT(args->oknoent);
			return XFS_ERROR(ENOENT);
		}
	}
#if XFS_BIG_FILESYSTEMS
	/*
	 * See if the old number was large, the new number is small.
	 */
	if (ino > XFS_DIR2_MAX_SHORT_INUM &&
	    args->inumber <= XFS_DIR2_MAX_SHORT_INUM) {
#pragma mips_frequency_hint NEVER
		/*
		 * And the old count was one, so need to convert to small.
		 */
		if (sfp->hdr.i8count == 1)
			xfs_dir2_sf_toino4(args);
		else
			sfp->hdr.i8count--;
	}
#endif
	xfs_dir2_sf_check(args);
	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
	return 0;
}
#endif /* XFS_REPAIR_SIM || !SIM */

#if XFS_BIG_FILESYSTEMS
#if defined(XFS_REPAIR_SIM) || !defined(SIM)
/*
 * Convert from 8-byte inode numbers to 4-byte inode numbers.
 * The last 8-byte inode number is gone, but the count is still 1.
 */
static void
xfs_dir2_sf_toino4(
	xfs_da_args_t		*args)		/* operation arguments */
{
	char			*buf;		/* old dir's buffer */
	xfs_inode_t		*dp;		/* incore directory inode */
	int			i;		/* entry index */
	xfs_ino_t		ino;		/* entry inode number */
	int			newsize;	/* new inode size */
	xfs_dir2_sf_entry_t	*oldsfep;	/* old sf entry */
	xfs_dir2_sf_t		*oldsfp;	/* old sf directory */
	int			oldsize;	/* old inode size */
	xfs_dir2_sf_entry_t	*sfep;		/* new sf entry */
	xfs_dir2_sf_t		*sfp;		/* new sf directory */

	xfs_dir2_trace_args("sf_toino4", args);
	dp = args->dp;
	/*
	 * Copy the old directory to the buffer.
	 * Then nuke it from the inode, and add the new buffer to the inode.
	 * Don't want xfs_idata_realloc copying the data here.
	 */
	oldsize = dp->i_df.if_bytes;
	buf = kmem_alloc(oldsize, KM_SLEEP);
	oldsfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	ASSERT(oldsfp->hdr.i8count == 1);
	bcopy(oldsfp, buf, oldsize);
	/*
	 * Compute the new inode size.
	 */
	newsize =
		oldsize -
		(oldsfp->hdr.count + 1) *
		((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
	xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
	xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
	/*
	 * Reset our pointers, the data has moved.
	 */
	oldsfp = (xfs_dir2_sf_t *)buf;
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	/*
	 * Fill in the new header.
	 */
	sfp->hdr.count = oldsfp->hdr.count;
	sfp->hdr.i8count = 0;
	ino = XFS_DIR2_SF_GET_INUMBER(oldsfp, &oldsfp->hdr.parent);
	XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, &sfp->hdr.parent);
	/*
	 * Copy the entries field by field.
	 */
	for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp),
		    oldsfep = XFS_DIR2_SF_FIRSTENTRY(oldsfp);
	     i < sfp->hdr.count;
	     i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep),
		  oldsfep = XFS_DIR2_SF_NEXTENTRY(oldsfp, oldsfep)) {
		sfep->namelen = oldsfep->namelen;
		sfep->offset = oldsfep->offset;
		bcopy(oldsfep->name, sfep->name, sfep->namelen);
		ino = XFS_DIR2_SF_GET_INUMBER(oldsfp,
			XFS_DIR2_SF_INUMBERP(oldsfep));
		XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, XFS_DIR2_SF_INUMBERP(sfep));
	}
	/*
	 * Clean up the inode.
	 */
	kmem_free(buf, oldsize);
	dp->i_d.di_size = newsize;
	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
}
#endif /* XFS_REPAIR_SIM || !defined(SIM) */

/*
 * Convert from 4-byte inode numbers to 8-byte inode numbers.
 * The new 8-byte inode number is not there yet, we leave with the
 * count 1 but no corresponding entry.
 */
static void
xfs_dir2_sf_toino8(
	xfs_da_args_t		*args)		/* operation arguments */
{
	char			*buf;		/* old dir's buffer */
	xfs_inode_t		*dp;		/* incore directory inode */
	int			i;		/* entry index */
	xfs_ino_t		ino;		/* entry inode number */
	int			newsize;	/* new inode size */
	xfs_dir2_sf_entry_t	*oldsfep;	/* old sf entry */
	xfs_dir2_sf_t		*oldsfp;	/* old sf directory */
	int			oldsize;	/* old inode size */
	xfs_dir2_sf_entry_t	*sfep;		/* new sf entry */
	xfs_dir2_sf_t		*sfp;		/* new sf directory */

	xfs_dir2_trace_args("sf_toino8", args);
	dp = args->dp;
	/*
	 * Copy the old directory to the buffer.
	 * Then nuke it from the inode, and add the new buffer to the inode.
	 * Don't want xfs_idata_realloc copying the data here.
	 */
	oldsize = dp->i_df.if_bytes;
	buf = kmem_alloc(oldsize, KM_SLEEP);
	oldsfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	ASSERT(oldsfp->hdr.i8count == 0);
	bcopy(oldsfp, buf, oldsize);
	/*
	 * Compute the new inode size.
	 */
	newsize =
		oldsize +
		(oldsfp->hdr.count + 1) *
		((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
	xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
	xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
	/*
	 * Reset our pointers, the data has moved.
	 */
	oldsfp = (xfs_dir2_sf_t *)buf;
	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	/*
	 * Fill in the new header.
	 */
	sfp->hdr.count = oldsfp->hdr.count;
	sfp->hdr.i8count = 1;
	ino = XFS_DIR2_SF_GET_INUMBER(oldsfp, &oldsfp->hdr.parent);
	XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, &sfp->hdr.parent);
	/*
	 * Copy the entries field by field.
	 */
	for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp),
		    oldsfep = XFS_DIR2_SF_FIRSTENTRY(oldsfp);
	     i < sfp->hdr.count;
	     i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep),
		  oldsfep = XFS_DIR2_SF_NEXTENTRY(oldsfp, oldsfep)) {
		sfep->namelen = oldsfep->namelen;
		sfep->offset = oldsfep->offset;
		bcopy(oldsfep->name, sfep->name, sfep->namelen);
		ino = XFS_DIR2_SF_GET_INUMBER(oldsfp,
			XFS_DIR2_SF_INUMBERP(oldsfep));
		XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, XFS_DIR2_SF_INUMBERP(sfep));
	}
	/*
	 * Clean up the inode.
	 */
	kmem_free(buf, oldsize);
	dp->i_d.di_size = newsize;
	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
}
#endif	/* XFS_BIG_FILESYSTEMS */