1 /* SPDX-License-Identifier: GPL-2.0 */
6 #ifndef __CHAN_USER_H__
7 #define __CHAN_USER_H__
10 #include <linux/types.h>
13 void (*const announce)(char *dev_name, int dev);
20 void *(*init)(char *, int, const struct chan_opts *);
21 int (*open)(int, int, int, void *, char **);
22 void (*close)(int, void *);
23 int (*read)(int, __u8 *, void *);
24 int (*write)(int, const __u8 *, size_t, void *);
25 int (*console_write)(int, const char *, int);
26 int (*window_size)(int, void *, unsigned short *, unsigned short *);
31 extern const struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops,
34 extern void generic_close(int fd, void *unused);
35 extern int generic_read(int fd, __u8 *c_out, void *unused);
36 extern int generic_write(int fd, const __u8 *buf, size_t n, void *unused);
37 extern int generic_console_write(int fd, const char *buf, int n);
38 extern int generic_window_size(int fd, void *unused, unsigned short *rows_out,
39 unsigned short *cols_out);
40 extern void generic_free(void *data);
43 extern void register_winch(int fd, struct tty_port *port);
44 extern void register_winch_irq(int fd, int tty_fd, int pid,
45 struct tty_port *port, unsigned long stack);
47 #define __channel_help(fn, prefix) \
48 __uml_help(fn, prefix "[0-9]*=<channel description>\n" \
49 " Attach a console or serial line to a host channel. See\n" \
50 " http://user-mode-linux.sourceforge.net/old/input.html for a complete\n" \
51 " description of this switch.\n\n" \