ref: b9679f355308ea5d3848b1229077fd02c0ddc8ae
dir: /include/ext4_dir_idx.h/
/*
* Copyright (c) 2013 Grzegorz Kostka ([email protected])
*
*
* HelenOS:
* Copyright (c) 2012 Martin Sucha
* Copyright (c) 2012 Frantisek Princ
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup lwext4
* @{
*/
/**
* @file ext4_dir_idx.h
* @brief Directory indexing procedures.
*/
#ifndef EXT4_DIR_IDX_H_
#define EXT4_DIR_IDX_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <ext4_config.h>
#include <ext4_types.h>
#include <ext4_fs.h>
#include <ext4_dir.h>
#include <stdint.h>
#include <stdbool.h>
struct ext4_dir_idx_block {
struct ext4_block b;
struct ext4_dir_idx_entry *entries;
struct ext4_dir_idx_entry *position;
};
#define EXT4_DIR_DX_INIT_BCNT 2
/**@brief Initialize index structure of new directory.
* @param dir Pointer to directory i-node
* @param dir Pointer to parent directory i-node
* @return Error code
*/
int ext4_dir_dx_init(struct ext4_inode_ref *dir,
struct ext4_inode_ref *parent);
/**@brief Try to find directory entry using directory index.
* @param result Output value - if entry will be found,
* than will be passed through this parameter
* @param inode_ref Directory i-node
* @param name_len Length of name to be found
* @param name Name to be found
* @return Error code
*/
int ext4_dir_dx_find_entry(struct ext4_dir_search_result *result,
struct ext4_inode_ref *inode_ref, size_t name_len,
const char *name);
/**@brief Add new entry to indexed directory
* @param parent Directory i-node
* @param child I-node to be referenced from directory entry
* @param name Name of new directory entry
* @return Error code
*/
int ext4_dir_dx_add_entry(struct ext4_inode_ref *parent,
struct ext4_inode_ref *child, const char *name, uint32_t name_len);
/**@brief Add new entry to indexed directory
* @param dir Directory i-node
* @param parent_inode parent inode index
* @return Error code
*/
int ext4_dir_dx_reset_parent_inode(struct ext4_inode_ref *dir,
uint32_t parent_inode);
#ifdef __cplusplus
}
#endif
#endif /* EXT4_DIR_IDX_H_ */
/**
* @}
*/