ref: f0f2d452c873255dec4b3359b3f93e349be0f2c5
dir: /sys/src/cmd/ext4srv/include/ext4_dir_idx.h/
#pragma once
#include "ext4_config.h"
#include "ext4_types.h"
#include "ext4_fs.h"
#include "ext4_dir.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, usize 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, u32int 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,
u32int parent_inode);