1struct inode;
2struct file;
3struct dentry;
4
5struct file_operations {
6	ssize_t (*read) (struct file *, char  *, size_t, loff_t *);
7	int (*open) (struct inode *, struct file *);
8	int (*release) (struct inode *, struct file *);
9	ssize_t (*write) (struct file *, const char *, size_t, loff_t *);
10};
11