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Code Issues Releases Wiki Activity

Devfs初步实现 (#41)

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* new: 在devfs中使用键盘文件（仍存在bug）

* new:支持dev目录下的readdir
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2022-09-07 23:27:27 +08:00
committed by GitHub
parent 86a5f25e07
commit 7d44599447
16 changed files with 683 additions and 215 deletions
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47
kernel/filesystem/VFS/mount.c Normal file
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#include "mount.h"
#include "VFS.h"
#include <common/glib.h>
#include <common/string.h>
static struct List mnt_list_head; // 挂载点链表头
/**
* @brief 初始化mount机制
*
* @return int 错误码
*/
int mount_init()
{
list_init(&mnt_list_head);
return 0;
}
/**
* @brief 将new_dentry挂载
*
* @param old_dentry 挂载点的dentry
* @param new_dentry 待挂载的新的dentry(需使用vfs_alloc_dentry来分配)
* @return int 错误码
*/
int do_mount(struct vfs_dir_entry_t *old_dentry, struct vfs_dir_entry_t *new_dentry)
{
struct mountpoint *mp = (struct mountpoint *)kzalloc(sizeof(struct mountpoint), 0);
list_init(&mp->mnt_list);
mp->dentry = old_dentry;
mp->parent_dentry = old_dentry->parent;
kdebug("&new_dentry->name=%#018lx, &old_dentry->name=%#018lx", &new_dentry->name, &old_dentry->name);
// 拷贝名称
strncpy(new_dentry->name, old_dentry->name, old_dentry->name_length);
list_init(&new_dentry->child_node_list);
list_init(&new_dentry->subdirs_list);
new_dentry->parent = old_dentry->parent;
// 将新的dentry的list结点替换掉父dentry的列表中的old_dentry的list结点
list_replace(&old_dentry->child_node_list, &new_dentry->child_node_list);
list_append(&mnt_list_head, &mp->mnt_list);
return 0;
}