mirror of
https://github.com/DragonOS-Community/DragonOS.git
synced 2025-06-12 05:56:48 +00:00
109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
#pragma once
|
||
|
||
#include "devfs.h"
|
||
#include <common/string.h>
|
||
|
||
extern struct vfs_super_block_operations_t devfs_sb_ops;
|
||
extern struct vfs_dir_entry_operations_t devfs_dentry_ops;
|
||
extern struct vfs_file_operations_t devfs_file_ops;
|
||
extern struct vfs_inode_operations_t devfs_inode_ops;
|
||
extern struct vfs_superblock_t devfs_sb;
|
||
|
||
// 分配inode
|
||
#define __devfs_alloc_inode() ((struct vfs_index_node_t *)kzalloc(sizeof(struct vfs_index_node_t), 0))
|
||
|
||
/**
|
||
* @brief 在devfs中注册字符设备（该函数只应被devfs调用）
|
||
*
|
||
* @param private_info inode私有信息
|
||
* @param target_dentry 返回的dentry的指针
|
||
* @return int 错误码
|
||
*/
|
||
int __devfs_chardev_register(struct devfs_private_inode_info_t *private_info, struct vfs_dir_entry_t **target_dentry);
|
||
|
||
/**
|
||
* @brief 初始化chardev管理机制
|
||
*
|
||
*/
|
||
void __devfs_chardev_init();
|
||
|
||
/**
|
||
* @brief 在父dentry中寻找子dentry
|
||
*
|
||
* @param parent_dentry 父dentry结点
|
||
* @param name 子目录项名称
|
||
* @return struct vfs_dir_entry_t*
|
||
*/
|
||
static inline struct vfs_dir_entry_t *__devfs_find_dentry(struct vfs_dir_entry_t *parent_dentry, const char *name)
|
||
{
|
||
struct List *list = &parent_dentry->subdirs_list;
|
||
while (list_next(list) != &parent_dentry->subdirs_list)
|
||
{
|
||
list = list_next(list);
|
||
// 获取目标dentry（由于是子目录项，因此是child_node_list）
|
||
struct vfs_dir_entry_t *target_dent = container_of(list, struct vfs_dir_entry_t, child_node_list);
|
||
if (strcmp(target_dent->name, name) == 0)
|
||
return target_dent;
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/**
|
||
* @brief 在父目录下查找子目录
|
||
*
|
||
* @param parent_dentry 父目录
|
||
* @param name 子目录名
|
||
* @return struct vfs_dir_entry_t* 子目录的dentry （找不到则返回NULL）
|
||
*/
|
||
static inline struct vfs_dir_entry_t *__devfs_find_dir(struct vfs_dir_entry_t *parent_dentry, const char *name)
|
||
{
|
||
struct vfs_dir_entry_t *target_dent = __devfs_find_dentry(parent_dentry, name);
|
||
if (target_dent->dir_inode->attribute & VFS_IF_DIR) // 名称相符且为目录，则返回dentry
|
||
return target_dent;
|
||
else
|
||
return NULL; // 否则直接返回空
|
||
}
|
||
|
||
/**
|
||
* @brief 将dentry和inode进行绑定，并填充inode
|
||
*
|
||
* @param dentry 目标dentry
|
||
* @param inode 目标inode
|
||
* @param inode_attr inode的属性
|
||
* @param private_inode_data inode私有信息
|
||
*/
|
||
static inline void __devfs_fill_inode(struct vfs_dir_entry_t *dentry, struct vfs_index_node_t *inode, uint64_t inode_attr, struct devfs_private_inode_info_t *private_inode_data)
|
||
{
|
||
dentry->dir_inode = inode;
|
||
dentry->dir_inode->file_ops = private_inode_data->f_ops;
|
||
dentry->dir_inode->inode_ops = &devfs_inode_ops;
|
||
|
||
dentry->dir_inode->private_inode_info = private_inode_data;
|
||
dentry->dir_inode->sb = &devfs_sb;
|
||
dentry->dir_inode->attribute = inode_attr;
|
||
}
|
||
|
||
/**
|
||
* @brief 填充dentry中的内容
|
||
*
|
||
* @param dentry 待填充的dentry
|
||
* @param name dentry名称
|
||
*/
|
||
static inline void __devfs_fill_dentry(struct vfs_dir_entry_t *dentry, const char *name)
|
||
{
|
||
strcpy(dentry->name, name);
|
||
dentry->name_length = strlen(name);
|
||
dentry->dir_ops = &devfs_dentry_ops;
|
||
}
|
||
|
||
/**
|
||
* @brief 将dentry与父dentry进行绑定
|
||
* @param parent 父目录项
|
||
* @param dentry 子目录项
|
||
*/
|
||
#define __devfs_dentry_bind_parent(parent_dentry, dentry) \
|
||
do \
|
||
{ \
|
||
(dentry)->parent = (parent_dentry); \
|
||
list_append(&((parent_dentry)->subdirs_list), &((dentry)->child_node_list)); \
|
||
} while (0) |