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Code Issues Releases Wiki Activity

调整：devfs注册设备后，返回指向inode私有信息的指针

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This commit is contained in:
fslongjin 2022-09-17 14:11:17 +08:00
parent 0435eb00b1
commit 0e624b1fcf
6 changed files with 41 additions and 21 deletions
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2
kernel/driver/keyboard/ps2_keyboard.c
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@ -205,7 +205,7 @@ void ps2_keyboard_init()
// 先读一下键盘的数据，防止由于在键盘初始化之前，由于按键被按下从而导致接收不到中断。
io_in8(PORT_PS2_KEYBOARD_DATA);
// 将设备挂载到devfs
devfs_register_device(DEV_TYPE_CHAR, CHAR_DEV_STYPE_PS2_KEYBOARD, &ps2_keyboard_fops);
devfs_register_device(DEV_TYPE_CHAR, CHAR_DEV_STYPE_PS2_KEYBOARD, &ps2_keyboard_fops, NULL);
kinfo("ps/2 keyboard registered.");
}

5
kernel/driver/tty/tty.c
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@ -2,6 +2,7 @@
#include <filesystem/VFS/VFS.h>
#include "tty.h"
static struct devfs_private_inode_info_t * tty_inode_private_data_ptr; // 由devfs创建的inode私有信息指针
static int tty_private_data;
/**
@ -87,6 +88,6 @@ struct vfs_file_operations_t tty_fops={
void tty_init(){
//注册devfs
devfs_register_device(DEV_TYPE_CHAR, CHAR_DEV_STYPE_TTY, &tty_fops);
kinfo("tty driver registered.");
devfs_register_device(DEV_TYPE_CHAR, CHAR_DEV_STYPE_TTY, &tty_fops, &tty_inode_private_data_ptr);
kinfo("tty driver registered. uuid=%d", tty_inode_private_data_ptr->uuid);
}

1
kernel/filesystem/devfs/devfs-types.h
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@ -42,4 +42,5 @@ struct devfs_private_inode_info_t
uint16_t type; // 设备主类型
uint16_t sub_type; // 设备子类型
struct vfs_file_operations_t *f_ops;
uint64_t uuid;
};

50
kernel/filesystem/devfs/devfs.c
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@ -4,6 +4,7 @@
#include <common/glib.h>
#include <common/string.h>
#include <mm/slab.h>
#include <common/spinlock.h>
struct vfs_super_block_operations_t devfs_sb_ops;
struct vfs_dir_entry_operations_t devfs_dentry_ops;
@ -14,6 +15,15 @@ struct vfs_dir_entry_t *devfs_root_dentry; // 根结点的dentry
struct vfs_superblock_t devfs_sb = {0};
const char __devfs_mount_path[] = "/dev";
static spinlock_t devfs_global_lock; // devfs的全局锁
static uint64_t __tmp_uuid = 0; // devfs的临时uuid变量（todo:在引入uuid lib之后删除这里）
static inline uint64_t __devfs_get_uuid()
{
// todo : 更改为使用uuid库来生成uuid
return ++__tmp_uuid;
}
/**
* @brief 创建devfs的super block
*
@ -32,11 +42,11 @@ struct vfs_superblock_t *devfs_read_superblock(struct block_device *blk)
return &devfs_sb;
}
static void devfs_write_superblock(struct vfs_superblock_t *sb) {return ; }
static void devfs_write_superblock(struct vfs_superblock_t *sb) { return; }
static void devfs_put_superblock(struct vfs_superblock_t *sb) {return ; }
static void devfs_put_superblock(struct vfs_superblock_t *sb) { return; }
static void devfs_write_inode(struct vfs_index_node_t *inode) {return ; }
static void devfs_write_inode(struct vfs_index_node_t *inode) { return; }
struct vfs_super_block_operations_t devfs_sb_ops =
{
.write_superblock = &devfs_write_superblock,
@ -44,13 +54,13 @@ struct vfs_super_block_operations_t devfs_sb_ops =
.write_inode = &devfs_write_inode,
};
static long devfs_compare(struct vfs_dir_entry_t *parent_dEntry, char *source_filename, char *dest_filename) {return 0; }
static long devfs_compare(struct vfs_dir_entry_t *parent_dEntry, char *source_filename, char *dest_filename) { return 0; }
static long devfs_hash(struct vfs_dir_entry_t *dEntry, char *filename) {return 0; }
static long devfs_hash(struct vfs_dir_entry_t *dEntry, char *filename) { return 0; }
static long devfs_release(struct vfs_dir_entry_t *dEntry) { return 0; }
static long devfs_iput(struct vfs_dir_entry_t *dEntry, struct vfs_index_node_t *inode) {return 0; }
static long devfs_iput(struct vfs_dir_entry_t *dEntry, struct vfs_index_node_t *inode) { return 0; }
struct vfs_dir_entry_operations_t devfs_dentry_ops =
{
@ -64,10 +74,10 @@ static long devfs_open(struct vfs_index_node_t *inode, struct vfs_file_t *file_p
{
return 0;
}
static long devfs_close(struct vfs_index_node_t *inode, struct vfs_file_t *file_ptr) {return 0; }
static long devfs_read(struct vfs_file_t *file_ptr, char *buf, int64_t count, long *position) {return 0; }
static long devfs_write(struct vfs_file_t *file_ptr, char *buf, int64_t count, long *position) {return 0; }
static long devfs_lseek(struct vfs_file_t *file_ptr, long offset, long origin) {return 0; }
static long devfs_close(struct vfs_index_node_t *inode, struct vfs_file_t *file_ptr) { return 0; }
static long devfs_read(struct vfs_file_t *file_ptr, char *buf, int64_t count, long *position) { return 0; }
static long devfs_write(struct vfs_file_t *file_ptr, char *buf, int64_t count, long *position) { return 0; }
static long devfs_lseek(struct vfs_file_t *file_ptr, long offset, long origin) { 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)
@ -122,7 +132,7 @@ struct vfs_file_operations_t devfs_file_ops =
*/
static long devfs_create(struct vfs_index_node_t *parent_inode, struct vfs_dir_entry_t *dest_dEntry, int mode)
{
return 0;
return 0;
}
static struct vfs_dir_entry_t *devfs_lookup(struct vfs_index_node_t *parent_inode, struct vfs_dir_entry_t *dest_dEntry)
@ -157,9 +167,9 @@ static long devfs_mkdir(struct vfs_index_node_t *inode, struct vfs_dir_entry_t *
}
static long devfs_rmdir(struct vfs_index_node_t *inode, struct vfs_dir_entry_t *dEntry) { return 0; }
static long devfs_rename(struct vfs_index_node_t *old_inode, struct vfs_dir_entry_t *old_dEntry, struct vfs_index_node_t *new_inode, struct vfs_dir_entry_t *new_dEntry) {return 0; }
static long devfs_getAttr(struct vfs_dir_entry_t *dEntry, uint64_t *attr) {return 0; }
static long devfs_setAttr(struct vfs_dir_entry_t *dEntry, uint64_t *attr) {return 0; }
static long devfs_rename(struct vfs_index_node_t *old_inode, struct vfs_dir_entry_t *old_dEntry, struct vfs_index_node_t *new_inode, struct vfs_dir_entry_t *new_dEntry) { return 0; }
static long devfs_getAttr(struct vfs_dir_entry_t *dEntry, uint64_t *attr) { return 0; }
static long devfs_setAttr(struct vfs_dir_entry_t *dEntry, uint64_t *attr) { return 0; }
struct vfs_inode_operations_t devfs_inode_ops = {
.create = &devfs_create,
.lookup = &devfs_lookup,
@ -208,16 +218,19 @@ static __always_inline void __devfs_init_root_dentry()
* @param device_type 设备主类型
* @param sub_type 设备子类型
* @param file_ops 设备的文件操作接口
* @param ret_private_inode_info_ptr 返回的指向inode私有信息结构体的指针
* @return int 错误码
*/
int devfs_register_device(uint16_t device_type, uint16_t sub_type, struct vfs_file_operations_t *file_ops)
int devfs_register_device(uint16_t device_type, uint16_t sub_type, struct vfs_file_operations_t *file_ops, struct devfs_private_inode_info_t **ret_private_inode_info_ptr)
{
spin_lock(&devfs_global_lock);
int retval = 0;
// 申请private info结构体
struct devfs_private_inode_info_t *private_info = (struct devfs_private_inode_info_t *)kzalloc(sizeof(struct devfs_private_inode_info_t), 0);
private_info->f_ops = file_ops;
private_info->type = device_type;
private_info->sub_type = sub_type;
private_info->uuid = __devfs_get_uuid();
struct vfs_dir_entry_t *dentry = NULL; // 该指针由对应类型设备的注册函数设置
@ -233,10 +246,14 @@ int devfs_register_device(uint16_t device_type, uint16_t sub_type, struct vfs_fi
goto failed;
break;
}
if (ret_private_inode_info_ptr != NULL)
*ret_private_inode_info_ptr = private_info;
spin_unlock(&devfs_global_lock);
return retval;
failed:;
kfree(private_info);
spin_unlock(&devfs_global_lock);
return retval;
}
@ -248,9 +265,8 @@ void devfs_init()
{
__devfs_init_root_dentry();
vfs_register_filesystem(&devfs_fs_type);
spin_init(&devfs_global_lock);
vfs_mount_fs(__devfs_mount_path, "DEVFS", NULL);
__devfs_chardev_init();
}

3
kernel/filesystem/devfs/devfs.h
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@ -14,6 +14,7 @@ void devfs_init();
* @param device_type 设备主类型
* @param sub_type 设备子类型
* @param file_ops 设备的文件操作接口
* @param ret_private_inode_info_ptr 返回的指向inode私有信息结构体的指针
* @return int 错误码
*/
int devfs_register_device(uint16_t device_type, uint16_t sub_type, struct vfs_file_operations_t *file_ops);
int devfs_register_device(uint16_t device_type, uint16_t sub_type, struct vfs_file_operations_t *file_ops, struct devfs_private_inode_info_t **ret_private_inode_info_ptr);

1
kernel/process/process.c
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@ -13,6 +13,7 @@
#include <exception/gate.h>
#include <filesystem/fat32/fat32.h>
#include <filesystem/devfs/devfs.h>
#include <filesystem/rootfs/rootfs.h>
#include <mm/slab.h>
#include <common/spinlock.h>
#include <syscall/syscall.h>