include/linux/fs.h

1822 struct file_operations {  struct
1823 	struct module *owner;
1824 	loff_t (*llseek) (struct file *, loff_t, int);
1825 	ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
1826 	ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
1827 	ssize_t (*read_iter) (struct kiocb *, struct iov_iter *);
1828 	ssize_t (*write_iter) (struct kiocb *, struct iov_iter *);
1829 	int (*iopoll)(struct kiocb *kiocb, bool spin);
1830 	int (*iterate) (struct file *, struct dir_context *);
1831 	int (*iterate_shared) (struct file *, struct dir_context *);
1832 	__poll_t (*poll) (struct file *, struct poll_table_struct *);
1833 	long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
1834 	long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
1835 	int (*mmap) (struct file *, struct vm_area_struct *);
1836 	unsigned long mmap_supported_flags;
1837 	int (*open) (struct inode *, struct file *);
1838 	int (*flush) (struct file *, fl_owner_t id);
1839 	int (*release) (struct inode *, struct file *);
1840 	int (*fsync) (struct file *, loff_t, loff_t, int datasync);
1841 	int (*fasync) (int, struct file *, int);
1842 	int (*lock) (struct file *, int, struct file_lock *);
1843 	ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
1844 …ng (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
1845 	int (*check_flags)(int);
1846 	int (*flock) (struct file *, int, struct file_lock *);
1847 	ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int);
1848 	ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int);
1849 	int (*setlease)(struct file *, long, struct file_lock **, void **);
1850 	long (*fallocate)(struct file *file, int mode, loff_t offset,
1852 	void (*show_fdinfo)(struct seq_file *m, struct file *f);
1854 	unsigned (*mmap_capabilities)(struct file *);
1856 	ssize_t (*copy_file_range)(struct file *, loff_t, struct file *,
1858 	loff_t (*remap_file_range)(struct file *file_in, loff_t pos_in,
1861 	int (*fadvise)(struct file *, loff_t, loff_t, int);