1/* SPDX-License-Identifier: GPL-2.0 */
 2/* termios.h: generic termios/termio user copying/translation
 3 */
 4
 5#ifndef _ASM_GENERIC_TERMIOS_BASE_H
 6#define _ASM_GENERIC_TERMIOS_BASE_H
 7
 8#include <linux/uaccess.h>
 9
10#ifndef __ARCH_TERMIO_GETPUT
11
12/*
13 * Translate a "termio" structure into a "termios". Ugh.
14 */
15static inline int user_termio_to_kernel_termios(struct ktermios *termios,
16						struct termio __user *termio)
17{
18	unsigned short tmp;
19
20	if (get_user(tmp, &termio->c_iflag) < 0)
21		goto fault;
22	termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
23
24	if (get_user(tmp, &termio->c_oflag) < 0)
25		goto fault;
26	termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
27
28	if (get_user(tmp, &termio->c_cflag) < 0)
29		goto fault;
30	termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
31
32	if (get_user(tmp, &termio->c_lflag) < 0)
33		goto fault;
34	termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
35
36	if (get_user(termios->c_line, &termio->c_line) < 0)
37		goto fault;
38
39	if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
40		goto fault;
41
42	return 0;
43
44 fault:
45	return -EFAULT;
46}
47
48/*
49 * Translate a "termios" structure into a "termio". Ugh.
50 */
51static inline int kernel_termios_to_user_termio(struct termio __user *termio,
52						struct ktermios *termios)
53{
54	if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
55	    put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
56	    put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
57	    put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
58	    put_user(termios->c_line,  &termio->c_line) < 0 ||
59	    copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
60		return -EFAULT;
61
62	return 0;
63}
64
65#ifndef user_termios_to_kernel_termios
66#define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))
67#endif
68
69#ifndef kernel_termios_to_user_termios
70#define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))
71#endif
72
73#define user_termios_to_kernel_termios_1(k, u) copy_from_user(k, u, sizeof(struct termios))
74#define kernel_termios_to_user_termios_1(u, k) copy_to_user(u, k, sizeof(struct termios))
75
76#endif	/* __ARCH_TERMIO_GETPUT */
77
78#endif /* _ASM_GENERIC_TERMIOS_BASE_H */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/* termios.h: generic termios/termio user copying/translation
 3 */
 4
 5#ifndef _ASM_GENERIC_TERMIOS_BASE_H
 6#define _ASM_GENERIC_TERMIOS_BASE_H
 7
 8#include <linux/uaccess.h>
 9
10#ifndef __ARCH_TERMIO_GETPUT
11
12/*
13 * Translate a "termio" structure into a "termios". Ugh.
14 */
15static inline int user_termio_to_kernel_termios(struct ktermios *termios,
16						struct termio __user *termio)
17{
18	unsigned short tmp;
19
20	if (get_user(tmp, &termio->c_iflag) < 0)
21		goto fault;
22	termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
23
24	if (get_user(tmp, &termio->c_oflag) < 0)
25		goto fault;
26	termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
27
28	if (get_user(tmp, &termio->c_cflag) < 0)
29		goto fault;
30	termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
31
32	if (get_user(tmp, &termio->c_lflag) < 0)
33		goto fault;
34	termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
35
36	if (get_user(termios->c_line, &termio->c_line) < 0)
37		goto fault;
38
39	if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
40		goto fault;
41
42	return 0;
43
44 fault:
45	return -EFAULT;
46}
47
48/*
49 * Translate a "termios" structure into a "termio". Ugh.
50 */
51static inline int kernel_termios_to_user_termio(struct termio __user *termio,
52						struct ktermios *termios)
53{
54	if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
55	    put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
56	    put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
57	    put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
58	    put_user(termios->c_line,  &termio->c_line) < 0 ||
59	    copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
60		return -EFAULT;
61
62	return 0;
63}
64
65#ifndef user_termios_to_kernel_termios
66#define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))
67#endif
68
69#ifndef kernel_termios_to_user_termios
70#define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))
71#endif
72
73#define user_termios_to_kernel_termios_1(k, u) copy_from_user(k, u, sizeof(struct termios))
74#define kernel_termios_to_user_termios_1(u, k) copy_to_user(u, k, sizeof(struct termios))
75
76#endif	/* __ARCH_TERMIO_GETPUT */
77
78#endif /* _ASM_GENERIC_TERMIOS_BASE_H */