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Code Issues Releases Wiki Activity

new:支持dev目录下的readdir

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This commit is contained in:
fslongjin
2022-09-07 23:25:39 +08:00
parent d7423f36be
commit ee9658b5d5
3 changed files with 43 additions and 6 deletions
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4
kernel/filesystem/VFS/VFS.c
View File

@ -157,9 +157,9 @@ struct vfs_dir_entry_t *vfs_path_walk(const char *path, uint64_t flags)
{
char bk = *(tmp_path + tmp_path_len);
*(tmp_path + tmp_path_len) = '\0';
kdebug("to search:%s", tmp_path);
// kdebug("to search:%s", tmp_path);
dentry = vfs_search_dentry_list(parent, tmp_path);
kdebug("search done, dentry=%#018lx", dentry);
// kdebug("search done, dentry=%#018lx", dentry);
*(tmp_path + tmp_path_len) = bk;
}

38
kernel/filesystem/devfs/devfs.c
View File

@ -65,8 +65,39 @@ static long devfs_close(struct vfs_index_node_t *inode, struct vfs_file_t *file_
static long devfs_read(struct vfs_file_t *file_ptr, char *buf, int64_t count, long *position) {}
static long devfs_write(struct vfs_file_t *file_ptr, char *buf, int64_t count, long *position) {}
static long devfs_lseek(struct vfs_file_t *file_ptr, long offset, long origin) {}
static long devfs_ioctl(struct vfs_index_node_t *inode, struct vfs_file_t *file_ptr, uint64_t cmd, uint64_t arg) {return 0;}
static long devfs_readdir(struct vfs_file_t *file_ptr, void *dirent, vfs_filldir_t filler) {return 0;}
static long devfs_ioctl(struct vfs_index_node_t *inode, struct vfs_file_t *file_ptr, uint64_t cmd, uint64_t arg) { return 0; }
static long devfs_readdir(struct vfs_file_t *file_ptr, void *dirent, vfs_filldir_t filler)
{
// 循环读取目录下的目录项
struct vfs_dir_entry_t *dentry = file_ptr->dEntry;
struct List *list = &dentry->subdirs_list;
// 先切换到position处
for (int i = 0; i <= file_ptr->position; ++i)
{
list = list_next(list);
if (list == &dentry->subdirs_list) // 找完了
goto failed;
}
// 存在目录项
// 增加偏移量
++file_ptr->position;
// 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);
kdebug("target name=%s, namelen=%d", target_dent->name, target_dent->name_length);
char *name = (char *)kzalloc(target_dent->name_length + 1, 0);
strncpy(name, target_dent->name, target_dent->name_length);
uint32_t dentry_type;
if (target_dent->dir_inode->attribute & VFS_ATTR_DIR)
dentry_type = VFS_ATTR_DIR;
else
dentry_type = VFS_ATTR_DEVICE;
return filler(dirent, file_ptr->position - 1, name, target_dent->name_length, dentry_type, file_ptr->position - 1);
failed:;
return 0;
}
static struct vfs_file_operations_t devfs_file_ops =
{
@ -124,6 +155,7 @@ static __always_inline void __devfs_init_root_inode()
// todo: 增加private inode info
devfs_root_dentry->dir_inode->private_inode_info = NULL;
devfs_root_dentry->dir_inode->sb = &devfs_sb;
devfs_root_dentry->dir_inode->attribute = VFS_ATTR_DIR;
}
/**
* @brief 初始化devfs的根dentry
@ -140,6 +172,7 @@ static __always_inline void __devfs_init_root_dentry()
int devfs_register_device()
{
// 暂时只支持键盘文件
char name[] = "keyboard.dev";
struct vfs_dir_entry_t *dentry = vfs_alloc_dentry(sizeof(name));
strcpy(dentry->name, name);
@ -150,6 +183,7 @@ int devfs_register_device()
dentry->dir_inode->inode_ops = &devfs_inode_ops;
dentry->dir_inode->private_inode_info = NULL; // todo:
dentry->dir_inode->sb = &devfs_sb;
dentry->dir_inode->attribute = VFS_ATTR_DEVICE;
dentry->parent = devfs_root_dentry;
list_init(&dentry->child_node_list);
list_init(&dentry->subdirs_list);