93 lines
3.3 KiB
C
93 lines
3.3 KiB
C
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#pragma once
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#include <u_types.h>
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#include <stdint.h>
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#include <sys/types.h>
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#define FS_FILE_NR 16 //!< 最大数量
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typedef struct file
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{
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off_t f_off; //!< 文件读写偏移
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umword_t f_flags; //!< flags.
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void *priv_data; //!< 私有数据
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} file_t;
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typedef struct inode
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{
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mode_t i_mode; //!< 权限信息
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size_t i_size; //!< 文件大小
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ino_t i_no; //!< inode编号
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size_t i_hlink; //!< 硬连接数
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void *i_priv_data; //!< inode的私有数据
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} inode_t;
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typedef struct super_operations
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{
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struct inode *(*alloc_inode)(struct inode *p_inode); //!< 申请指定文件系统的inode
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void (*free_inode)(struct inode *p_inode); //!< 释放指定文件系统的inode
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int32_t (*read_inode)(struct inode *p_r_ino);
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int (*notify_change)(int flags, struct inode *);
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void (*write_inode)(struct inode *);
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void (*put_inode)(struct inode *);
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void (*put_super)(struct super_block *);
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void (*write_super)(struct super_block *);
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void (*statfs)(struct super_block *, struct statfs *);
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int (*remount_fs)(struct super_block *, int *, char *);
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} super_operations_t;
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typedef struct super_block
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{
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struct inode *root_inode; //!< 根节点
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super_operations_t *sb_ops; //!< super_block的操作
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umword_t s_magic;
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} super_block_t;
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/**
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* file对文件的操作
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*/
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struct file_operations
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{
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int (*lseek)(struct inode *, struct file *, off_t, int);
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int (*read)(struct inode *, struct file *, char *, int);
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int (*write)(struct inode *, struct file *, char *, int);
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int (*readdir)(struct inode *, struct file *, struct dirent *, int);
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int (*select)(struct inode *, struct file *, int, uint32_t *);
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int (*poll)(struct inode *inode, struct file *fp, void *wait_tb,
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struct timeval *timeout);
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int (*ioctl)(struct inode *, struct file *, unsigned int, unsigned long);
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int (*mmap)(struct inode *inode, struct file *fp, unsigned long addr,
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size_t len, int mask, unsigned long off);
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int (*mumap)(struct inode *inode, void *start, size_t len);
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int (*open)(struct inode *inode, struct file *fp);
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void (*release)(struct inode *ino, struct file *f);
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int (*fsync)(struct inode *, struct file *);
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};
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/**
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* inode对应的操作
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*/
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struct inode_operations
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{
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struct file_operations *default_file_ops;
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int (*create)(struct inode *dir, const char *name, int len, int mode,
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struct inode **result);
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int (*lookup)(struct inode *dir, const char *file_name, int len,
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struct inode **ret_inode);
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int (*link)(struct inode *, struct inode *, const char *, int);
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int (*unlink)(struct inode *, const char *, int);
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int (*symlink)(struct inode *, const char *, int, const char *);
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int (*mkdir)(struct inode *, const char *, int, int);
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int (*rmdir)(struct inode *, const char *, int);
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int (*mknod)(struct inode *, const char *, int, int, int);
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int (*rename)(struct inode *, const char *, int, struct inode *, const char *,
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int);
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int (*readlink)(struct inode *, char *, int);
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int (*follow_link)(struct inode *, struct inode *, int, int, struct inode **);
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int (*bmap)(struct inode *, int);
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void (*truncate)(struct inode *, int);
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int (*permission)(struct inode *, int);
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};
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