1549 ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in,  in vfs_copy_file_range()  argument
1553 	struct inode *inode_in = file_inode(file_in);  in vfs_copy_file_range()
1565 	ret = rw_verify_area(READ, file_in, &pos_in, len);  in vfs_copy_file_range()
1573 	if (!(file_in->f_mode & FMODE_READ) ||  in vfs_copy_file_range()
1591 	if (file_in->f_op->clone_file_range) {  in vfs_copy_file_range()
1592 		ret = file_in->f_op->clone_file_range(file_in, pos_in,  in vfs_copy_file_range()
1601 		ret = file_out->f_op->copy_file_range(file_in, pos_in, file_out,  in vfs_copy_file_range()
1607 	ret = do_splice_direct(file_in, &pos_in, file_out, &pos_out,  in vfs_copy_file_range()
1612 		fsnotify_access(file_in);  in vfs_copy_file_range()
1821 int do_clone_file_range(struct file *file_in, loff_t pos_in,  in do_clone_file_range()  argument
1824 	struct inode *inode_in = file_inode(file_in);  in do_clone_file_range()
1841 	if (!(file_in->f_mode & FMODE_READ) ||  in do_clone_file_range()
1846 	if (!file_in->f_op->clone_file_range)  in do_clone_file_range()
1849 	ret = clone_verify_area(file_in, pos_in, len, false);  in do_clone_file_range()
1860 	ret = file_in->f_op->clone_file_range(file_in, pos_in,  in do_clone_file_range()
1863 		fsnotify_access(file_in);  in do_clone_file_range()
1871 int vfs_clone_file_range(struct file *file_in, loff_t pos_in,  in vfs_clone_file_range()  argument
1877 	ret = do_clone_file_range(file_in, pos_in, file_out, pos_out, len);  in vfs_clone_file_range()