1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef _ASM_GENERIC_TERMIOS_H
3*4882a593Smuzhiyun #define _ASM_GENERIC_TERMIOS_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <linux/uaccess.h>
7*4882a593Smuzhiyun #include <uapi/asm-generic/termios.h>
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun /* intr=^C quit=^\ erase=del kill=^U
10*4882a593Smuzhiyun eof=^D vtime=\0 vmin=\1 sxtc=\0
11*4882a593Smuzhiyun start=^Q stop=^S susp=^Z eol=\0
12*4882a593Smuzhiyun reprint=^R discard=^U werase=^W lnext=^V
13*4882a593Smuzhiyun eol2=\0
14*4882a593Smuzhiyun */
15*4882a593Smuzhiyun #define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun /*
18*4882a593Smuzhiyun * Translate a "termio" structure into a "termios". Ugh.
19*4882a593Smuzhiyun */
user_termio_to_kernel_termios(struct ktermios * termios,const struct termio __user * termio)20*4882a593Smuzhiyun static inline int user_termio_to_kernel_termios(struct ktermios *termios,
21*4882a593Smuzhiyun const struct termio __user *termio)
22*4882a593Smuzhiyun {
23*4882a593Smuzhiyun unsigned short tmp;
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun if (get_user(tmp, &termio->c_iflag) < 0)
26*4882a593Smuzhiyun goto fault;
27*4882a593Smuzhiyun termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun if (get_user(tmp, &termio->c_oflag) < 0)
30*4882a593Smuzhiyun goto fault;
31*4882a593Smuzhiyun termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun if (get_user(tmp, &termio->c_cflag) < 0)
34*4882a593Smuzhiyun goto fault;
35*4882a593Smuzhiyun termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun if (get_user(tmp, &termio->c_lflag) < 0)
38*4882a593Smuzhiyun goto fault;
39*4882a593Smuzhiyun termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun if (get_user(termios->c_line, &termio->c_line) < 0)
42*4882a593Smuzhiyun goto fault;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
45*4882a593Smuzhiyun goto fault;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun return 0;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun fault:
50*4882a593Smuzhiyun return -EFAULT;
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun /*
54*4882a593Smuzhiyun * Translate a "termios" structure into a "termio". Ugh.
55*4882a593Smuzhiyun */
kernel_termios_to_user_termio(struct termio __user * termio,struct ktermios * termios)56*4882a593Smuzhiyun static inline int kernel_termios_to_user_termio(struct termio __user *termio,
57*4882a593Smuzhiyun struct ktermios *termios)
58*4882a593Smuzhiyun {
59*4882a593Smuzhiyun if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
60*4882a593Smuzhiyun put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
61*4882a593Smuzhiyun put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
62*4882a593Smuzhiyun put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
63*4882a593Smuzhiyun put_user(termios->c_line, &termio->c_line) < 0 ||
64*4882a593Smuzhiyun copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
65*4882a593Smuzhiyun return -EFAULT;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun return 0;
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun #ifdef TCGETS2
user_termios_to_kernel_termios(struct ktermios * k,struct termios2 __user * u)71*4882a593Smuzhiyun static inline int user_termios_to_kernel_termios(struct ktermios *k,
72*4882a593Smuzhiyun struct termios2 __user *u)
73*4882a593Smuzhiyun {
74*4882a593Smuzhiyun return copy_from_user(k, u, sizeof(struct termios2));
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
kernel_termios_to_user_termios(struct termios2 __user * u,struct ktermios * k)77*4882a593Smuzhiyun static inline int kernel_termios_to_user_termios(struct termios2 __user *u,
78*4882a593Smuzhiyun struct ktermios *k)
79*4882a593Smuzhiyun {
80*4882a593Smuzhiyun return copy_to_user(u, k, sizeof(struct termios2));
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun
user_termios_to_kernel_termios_1(struct ktermios * k,struct termios __user * u)83*4882a593Smuzhiyun static inline int user_termios_to_kernel_termios_1(struct ktermios *k,
84*4882a593Smuzhiyun struct termios __user *u)
85*4882a593Smuzhiyun {
86*4882a593Smuzhiyun return copy_from_user(k, u, sizeof(struct termios));
87*4882a593Smuzhiyun }
88*4882a593Smuzhiyun
kernel_termios_to_user_termios_1(struct termios __user * u,struct ktermios * k)89*4882a593Smuzhiyun static inline int kernel_termios_to_user_termios_1(struct termios __user *u,
90*4882a593Smuzhiyun struct ktermios *k)
91*4882a593Smuzhiyun {
92*4882a593Smuzhiyun return copy_to_user(u, k, sizeof(struct termios));
93*4882a593Smuzhiyun }
94*4882a593Smuzhiyun #else /* TCGETS2 */
user_termios_to_kernel_termios(struct ktermios * k,struct termios __user * u)95*4882a593Smuzhiyun static inline int user_termios_to_kernel_termios(struct ktermios *k,
96*4882a593Smuzhiyun struct termios __user *u)
97*4882a593Smuzhiyun {
98*4882a593Smuzhiyun return copy_from_user(k, u, sizeof(struct termios));
99*4882a593Smuzhiyun }
100*4882a593Smuzhiyun
kernel_termios_to_user_termios(struct termios __user * u,struct ktermios * k)101*4882a593Smuzhiyun static inline int kernel_termios_to_user_termios(struct termios __user *u,
102*4882a593Smuzhiyun struct ktermios *k)
103*4882a593Smuzhiyun {
104*4882a593Smuzhiyun return copy_to_user(u, k, sizeof(struct termios));
105*4882a593Smuzhiyun }
106*4882a593Smuzhiyun #endif /* TCGETS2 */
107*4882a593Smuzhiyun
108*4882a593Smuzhiyun #endif /* _ASM_GENERIC_TERMIOS_H */
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