#kernel #programming #fr #drivers #fileops

Linux drivers programming

La structure file_operations est défini dans linux/fs.h est il a des champs qui sont des pointeurs aux fonctions. Chaque fichier char associé à un driver est associé a une structure file_operations 1d8f-linux-file-struct.

 struct file_operations {
	struct module *owner;
	loff_t (*llseek) (struct file *, loff_t, int);
	ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
	ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
	ssize_t (*read_iter) (struct kiocb *, struct iov_iter *);
	ssize_t (*write_iter) (struct kiocb *, struct iov_iter *);
	long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
	long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
	int (*open) (struct inode *, struct file *);
	int (*release) (struct inode *, struct file *);
	/* ... */
}