path: root/fs/xfs/xfs_dir.c

/*
 * Copyright (c) 2000-2001,2005 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.
 *
 * This program is distributed in the hope that it would 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.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_types.h"
#include "xfs_log.h"
#include "xfs_inum.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_dir.h"
#include "xfs_dir2.h"
#include "xfs_dmapi.h"
#include "xfs_mount.h"
#include "xfs_da_btree.h"
#include "xfs_bmap_btree.h"
#include "xfs_alloc_btree.h"
#include "xfs_ialloc_btree.h"
#include "xfs_alloc.h"
#include "xfs_btree.h"
#include "xfs_dir_sf.h"
#include "xfs_dir2_sf.h"
#include "xfs_attr_sf.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_bmap.h"
#include "xfs_dir_leaf.h"
#include "xfs_error.h"

/*
 * xfs_dir.c
 *
 * Provide the external interfaces to manage directories.
 */

/*========================================================================
 * Function prototypes for the kernel.
 *========================================================================*/

/*
 * Functions for the dirops interfaces.
 */
static void	xfs_dir_mount(struct xfs_mount *mp);

static int	xfs_dir_isempty(struct xfs_inode *dp);

static int	xfs_dir_init(struct xfs_trans *trans,
			     struct xfs_inode *dir,
			     struct xfs_inode *parent_dir);

static int	xfs_dir_createname(struct xfs_trans *trans,
				   struct xfs_inode *dp,
				   char *name_string,
				   int name_len,
				   xfs_ino_t inode_number,
				   xfs_fsblock_t *firstblock,
				   xfs_bmap_free_t *flist,
				   xfs_extlen_t total);

static int	xfs_dir_lookup(struct xfs_trans *tp,
			       struct xfs_inode *dp,
			       char *name_string,
			       int name_length,
			       xfs_ino_t *inode_number);

static int	xfs_dir_removename(struct xfs_trans *trans,
				   struct xfs_inode *dp,
				   char *name_string,
				   int name_length,
				   xfs_ino_t ino,
				   xfs_fsblock_t *firstblock,
				   xfs_bmap_free_t *flist,
				   xfs_extlen_t total);

static int	xfs_dir_getdents(struct xfs_trans *tp,
				 struct xfs_inode *dp,
				 struct uio *uiop,
				 int *eofp);

static int	xfs_dir_replace(struct xfs_trans *tp,
				struct xfs_inode *dp,
				char *name_string,
				int name_length,
				xfs_ino_t inode_number,
				xfs_fsblock_t *firstblock,
				xfs_bmap_free_t *flist,
				xfs_extlen_t total);

static int	xfs_dir_canenter(struct xfs_trans *tp,
				 struct xfs_inode *dp,
				 char *name_string,
				 int name_length);

static int	xfs_dir_shortform_validate_ondisk(xfs_mount_t *mp,
						  xfs_dinode_t *dip);

xfs_dirops_t xfsv1_dirops = {
	.xd_mount			= xfs_dir_mount,
	.xd_isempty			= xfs_dir_isempty,
	.xd_init			= xfs_dir_init,
	.xd_createname			= xfs_dir_createname,
	.xd_lookup			= xfs_dir_lookup,
	.xd_removename			= xfs_dir_removename,
	.xd_getdents			= xfs_dir_getdents,