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fs/ocfs2/dir.h
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/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* dir.h
*
* Function prototypes
*
* Copyright (C) 2002, 2004 Oracle. 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 to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#ifndef OCFS2_DIR_H
#define OCFS2_DIR_H
struct ocfs2_dx_hinfo {
u32 major_hash;
u32 minor_hash;
};
struct ocfs2_dir_lookup_result {
struct buffer_head *dl_leaf_bh; /* Unindexed leaf
* block */
struct ocfs2_dir_entry *dl_entry; /* Target dirent in
* unindexed leaf */
struct buffer_head *dl_dx_root_bh; /* Root of indexed
* tree */
struct buffer_head *dl_dx_leaf_bh; /* Indexed leaf block */
struct ocfs2_dx_entry *dl_dx_entry; /* Target dx_entry in
* indexed leaf */
struct ocfs2_dx_hinfo dl_hinfo; /* Name hash results */
struct buffer_head *dl_prev_leaf_bh;/* Previous entry in
* dir free space
* list. NULL if
* previous entry is
* dx root block. */
};
void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res);
int ocfs2_find_entry(const char *name, int namelen,
struct inode *dir,
struct ocfs2_dir_lookup_result *lookup);
int ocfs2_delete_entry(handle_t *handle,
struct inode *dir,
struct ocfs2_dir_lookup_result *res);
int __ocfs2_add_entry(handle_t *handle,
struct inode *dir,
const char *name, int namelen,
struct inode *inode, u64 blkno,
struct buffer_head *parent_fe_bh,
struct ocfs2_dir_lookup_result *lookup);
static inline int ocfs2_add_entry(handle_t *handle,
struct dentry *dentry,
struct inode *inode, u64 blkno,
struct buffer_head *parent_fe_bh,
struct ocfs2_dir_lookup_result *lookup)
{
return __ocfs2_add_entry(handle, d_inode(dentry->d_parent),
dentry->d_name.name, dentry->d_name.len,
inode, blkno, parent_fe_bh, lookup);
}
int ocfs2_update_entry(struct inode *dir, handle_t *handle,
struct ocfs2_dir_lookup_result *res,
struct inode *new_entry_inode);
int ocfs2_check_dir_for_entry(struct inode *dir,
const char *name,
int namelen);
int ocfs2_empty_dir(struct inode *inode);
int ocfs2_find_files_on_disk(const char *name,
int namelen,
u64 *blkno,
struct inode *inode,
struct ocfs2_dir_lookup_result *res);
int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name,
int namelen, u64 *blkno);
int ocfs2_readdir(struct file *file, struct dir_context *ctx);
int ocfs2_dir_foreach(struct inode *inode, struct dir_context *ctx);
int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb,
struct inode *dir,
struct buffer_head *parent_fe_bh,
const char *name,
int namelen,
struct ocfs2_dir_lookup_result *lookup);
struct ocfs2_alloc_context;
int ocfs2_fill_new_dir(struct ocfs2_super *osb,
handle_t *handle,
struct inode *parent,
struct inode *inode,
struct buffer_head *fe_bh,
struct ocfs2_alloc_context *data_ac,
struct ocfs2_alloc_context *meta_ac);
int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh);
struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize,
void *data);
#endif /* OCFS2_DIR_H */
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