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