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