1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /* termios.h: generic termios/termio user copying/translation
3*4882a593Smuzhiyun */
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #ifndef _ASM_GENERIC_TERMIOS_BASE_H
6*4882a593Smuzhiyun #define _ASM_GENERIC_TERMIOS_BASE_H
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/uaccess.h>
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #ifndef __ARCH_TERMIO_GETPUT
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun /*
13*4882a593Smuzhiyun * Translate a "termio" structure into a "termios". Ugh.
14*4882a593Smuzhiyun */
user_termio_to_kernel_termios(struct ktermios * termios,struct termio __user * termio)15*4882a593Smuzhiyun static inline int user_termio_to_kernel_termios(struct ktermios *termios,
16*4882a593Smuzhiyun struct termio __user *termio)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun unsigned short tmp;
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun if (get_user(tmp, &termio->c_iflag) < 0)
21*4882a593Smuzhiyun goto fault;
22*4882a593Smuzhiyun termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun if (get_user(tmp, &termio->c_oflag) < 0)
25*4882a593Smuzhiyun goto fault;
26*4882a593Smuzhiyun termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun if (get_user(tmp, &termio->c_cflag) < 0)
29*4882a593Smuzhiyun goto fault;
30*4882a593Smuzhiyun termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun if (get_user(tmp, &termio->c_lflag) < 0)
33*4882a593Smuzhiyun goto fault;
34*4882a593Smuzhiyun termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun if (get_user(termios->c_line, &termio->c_line) < 0)
37*4882a593Smuzhiyun goto fault;
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
40*4882a593Smuzhiyun goto fault;
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun return 0;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun fault:
45*4882a593Smuzhiyun return -EFAULT;
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun /*
49*4882a593Smuzhiyun * Translate a "termios" structure into a "termio". Ugh.
50*4882a593Smuzhiyun */
kernel_termios_to_user_termio(struct termio __user * termio,struct ktermios * termios)51*4882a593Smuzhiyun static inline int kernel_termios_to_user_termio(struct termio __user *termio,
52*4882a593Smuzhiyun struct ktermios *termios)
53*4882a593Smuzhiyun {
54*4882a593Smuzhiyun if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
55*4882a593Smuzhiyun put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
56*4882a593Smuzhiyun put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
57*4882a593Smuzhiyun put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
58*4882a593Smuzhiyun put_user(termios->c_line, &termio->c_line) < 0 ||
59*4882a593Smuzhiyun copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
60*4882a593Smuzhiyun return -EFAULT;
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun return 0;
63*4882a593Smuzhiyun }
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun #ifndef user_termios_to_kernel_termios
66*4882a593Smuzhiyun #define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))
67*4882a593Smuzhiyun #endif
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun #ifndef kernel_termios_to_user_termios
70*4882a593Smuzhiyun #define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))
71*4882a593Smuzhiyun #endif
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun #define user_termios_to_kernel_termios_1(k, u) copy_from_user(k, u, sizeof(struct termios))
74*4882a593Smuzhiyun #define kernel_termios_to_user_termios_1(u, k) copy_to_user(u, k, sizeof(struct termios))
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun #endif /* __ARCH_TERMIO_GETPUT */
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun #endif /* _ASM_GENERIC_TERMIOS_BASE_H */
79