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/fs/ocfs2/dir.h

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t
C Header | 117 lines | 73 code | 12 blank | 32 comment | 0 complexity | 95cdd4ed8037dde62b9f3b2ed31df1d3 MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
  1/* -*- mode: c; c-basic-offset: 8; -*-
  2 * vim: noexpandtab sw=8 ts=8 sts=0:
  3 *
  4 * dir.h
  5 *
  6 * Function prototypes
  7 *
  8 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
  9 *
 10 * This program is free software; you can redistribute it and/or
 11 * modify it under the terms of the GNU General Public
 12 * License as published by the Free Software Foundation; either
 13 * version 2 of the License, or (at your option) any later version.
 14 *
 15 * This program is distributed in the hope that it will be useful,
 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 18 * General Public License for more details.
 19 *
 20 * You should have received a copy of the GNU General Public
 21 * License along with this program; if not, write to the
 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 23 * Boston, MA 021110-1307, USA.
 24 */
 25
 26#ifndef OCFS2_DIR_H
 27#define OCFS2_DIR_H
 28
 29struct ocfs2_dx_hinfo {
 30	u32	major_hash;
 31	u32	minor_hash;
 32};
 33
 34struct ocfs2_dir_lookup_result {
 35	struct buffer_head		*dl_leaf_bh;	/* Unindexed leaf
 36							 * block */
 37	struct ocfs2_dir_entry		*dl_entry;	/* Target dirent in
 38							 * unindexed leaf */
 39
 40	struct buffer_head		*dl_dx_root_bh;	/* Root of indexed
 41							 * tree */
 42
 43	struct buffer_head		*dl_dx_leaf_bh;	/* Indexed leaf block */
 44	struct ocfs2_dx_entry		*dl_dx_entry;	/* Target dx_entry in
 45							 * indexed leaf */
 46	struct ocfs2_dx_hinfo		dl_hinfo;	/* Name hash results */
 47
 48	struct buffer_head		*dl_prev_leaf_bh;/* Previous entry in
 49							  * dir free space
 50							  * list. NULL if
 51							  * previous entry is
 52							  * dx root block. */
 53};
 54
 55void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res);
 56
 57int ocfs2_find_entry(const char *name, int namelen,
 58		     struct inode *dir,
 59		     struct ocfs2_dir_lookup_result *lookup);
 60int ocfs2_delete_entry(handle_t *handle,
 61		       struct inode *dir,
 62		       struct ocfs2_dir_lookup_result *res);
 63int __ocfs2_add_entry(handle_t *handle,
 64		      struct inode *dir,
 65		      const char *name, int namelen,
 66		      struct inode *inode, u64 blkno,
 67		      struct buffer_head *parent_fe_bh,
 68		      struct ocfs2_dir_lookup_result *lookup);
 69static inline int ocfs2_add_entry(handle_t *handle,
 70				  struct dentry *dentry,
 71				  struct inode *inode, u64 blkno,
 72				  struct buffer_head *parent_fe_bh,
 73				  struct ocfs2_dir_lookup_result *lookup)
 74{
 75	return __ocfs2_add_entry(handle, dentry->d_parent->d_inode,
 76				 dentry->d_name.name, dentry->d_name.len,
 77				 inode, blkno, parent_fe_bh, lookup);
 78}
 79int ocfs2_update_entry(struct inode *dir, handle_t *handle,
 80		       struct ocfs2_dir_lookup_result *res,
 81		       struct inode *new_entry_inode);
 82
 83int ocfs2_check_dir_for_entry(struct inode *dir,
 84			      const char *name,
 85			      int namelen);
 86int ocfs2_empty_dir(struct inode *inode);
 87
 88int ocfs2_find_files_on_disk(const char *name,
 89			     int namelen,
 90			     u64 *blkno,
 91			     struct inode *inode,
 92			     struct ocfs2_dir_lookup_result *res);
 93int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name,
 94			       int namelen, u64 *blkno);
 95int ocfs2_readdir(struct file *filp, void *dirent, filldir_t filldir);
 96int ocfs2_dir_foreach(struct inode *inode, loff_t *f_pos, void *priv,
 97		      filldir_t filldir);
 98int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb,
 99				 struct inode *dir,
100				 struct buffer_head *parent_fe_bh,
101				 const char *name,
102				 int namelen,
103				 struct ocfs2_dir_lookup_result *lookup);
104struct ocfs2_alloc_context;
105int ocfs2_fill_new_dir(struct ocfs2_super *osb,
106		       handle_t *handle,
107		       struct inode *parent,
108		       struct inode *inode,
109		       struct buffer_head *fe_bh,
110		       struct ocfs2_alloc_context *data_ac,
111		       struct ocfs2_alloc_context *meta_ac);
112
113int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh);
114
115struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize,
116							    void *data);
117#endif /* OCFS2_DIR_H */