Example #1
0
/*
 * 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);
	ASSERT(XFS_BIG_INUMS || i8count == 0);
	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);
}
Example #2
0
xfs_intino_t
xfs_dir2_sf_get_inumber(xfs_dir2_sf_t *sfp, xfs_dir2_inou_t *from)
{
    return XFS_DIR2_SF_GET_INUMBER(sfp, from);
}
Example #3
0
/*
 * 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)) {
		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] &&
		    memcmp(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) {
		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)
		memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize,
			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_INUMS
	/*
	 * Are we changing inode number size?
	 */
	if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
		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;
}
Example #4
0
/*
 * 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)) {
		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] &&
		    memcmp(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);
}
Example #5
0
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) */
	xfs_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 */
	xfs_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)) {
		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) {
		*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);
		p.ino = dp->i_ino;
#if XFS_BIG_INUMS
		p.ino += mp->m_inoadd;
#endif
		p.name = ".";
		p.namelen = 1;

		error = p.put(&p);

		if (!p.done) {
			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);
		p.ino = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent);
#if XFS_BIG_INUMS
		p.ino += mp->m_inoadd;
#endif
		p.name = "..";
		p.namelen = 2;

		error = p.put(&p);

		if (!p.done) {
			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));

		p.ino = XFS_DIR2_SF_GET_INUMBER(sfp, XFS_DIR2_SF_INUMBERP(sfep));
#if XFS_BIG_INUMS
		p.ino += mp->m_inoadd;
#endif
		p.name = (char *)sfep->name;

		error = p.put(&p);

		if (!p.done) {
			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;
}
Example #6
0
/*
 * 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_ino_t               temp;

	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);
	memcpy(block, bp->data, mp->m_dirblksize);
	logflags = XFS_ILOG_CORE;
	if ((error = xfs_dir2_shrink_inode(args, mp->m_dirdatablk, bp))) {
		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;
	memcpy(sfp, sfhp, 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 (INT_GET(dup->freetag, ARCH_CONVERT) == XFS_DIR2_DATA_FREE_TAG) {
			ptr += INT_GET(dup->length, ARCH_CONVERT);
			continue;
		}
		dep = (xfs_dir2_data_entry_t *)ptr;
		/*
		 * Skip .
		 */
		if (dep->namelen == 1 && dep->name[0] == '.')
			ASSERT(INT_GET(dep->inumber, ARCH_CONVERT) == dp->i_ino);
		/*
		 * Skip .., but make sure the inode number is right.
		 */
		else if (dep->namelen == 2 &&
			 dep->name[0] == '.' && dep->name[1] == '.')
			ASSERT(INT_GET(dep->inumber, ARCH_CONVERT) ==
			       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));
			memcpy(sfep->name, dep->name, dep->namelen);
			temp=INT_GET(dep->inumber, ARCH_CONVERT);
			XFS_DIR2_SF_PUT_INUMBER(sfp, &temp,
				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;
}
Example #7
0
/*
 * 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);
	memcpy(buf, oldsfp, 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;
		memcpy(sfep->name, oldsfep->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);
}
Example #8
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_INUMS || defined(DEBUG)
	xfs_ino_t		ino=0;		/* entry old inode number */
#endif
#if XFS_BIG_INUMS
	int			i8elevated;	/* sf_toino8 set i8count=1 */
#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)) {
		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_INUMS
	/*
	 * 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) {
		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);
		i8elevated = 1;
		sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
	} else
		i8elevated = 0;
#endif
	ASSERT(args->namelen != 1 || args->name[0] != '.');
	/*
	 * Replace ..'s entry.
	 */
	if (args->namelen == 2 &&
	    args->name[0] == '.' && args->name[1] == '.') {
#if XFS_BIG_INUMS || 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] &&
			    memcmp(args->name, sfep->name, args->namelen) == 0) {
#if XFS_BIG_INUMS || 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) {
			ASSERT(args->oknoent);
#if XFS_BIG_INUMS
			if (i8elevated)
				xfs_dir2_sf_toino4(args);
#endif
			return XFS_ERROR(ENOENT);
		}
	}
#if XFS_BIG_INUMS
	/*
	 * 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) {
		/*
		 * 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--;
	}
	/*
	 * See if the old number was small, the new number is large.
	 */
	if (ino <= XFS_DIR2_MAX_SHORT_INUM &&
	    args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
		/*
		 * add to the i8count unless we just converted to 8-byte
		 * inodes (which does an implied i8count = 1)
		 */
		ASSERT(sfp->hdr.i8count != 0);
		if (!i8elevated)
			sfp->hdr.i8count++;
	}
#endif
	xfs_dir2_sf_check(args);
	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
	return 0;
}