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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
6103ec56 AB |
2 | #ifndef _ASM_GENERIC_TERMIOS_H |
3 | #define _ASM_GENERIC_TERMIOS_H | |
6103ec56 | 4 | |
6103ec56 | 5 | |
7c0f6ba6 | 6 | #include <linux/uaccess.h> |
8a1ab315 | 7 | #include <uapi/asm-generic/termios.h> |
6103ec56 AB |
8 | |
9 | /* intr=^C quit=^\ erase=del kill=^U | |
10 | eof=^D vtime=\0 vmin=\1 sxtc=\0 | |
11 | start=^Q stop=^S susp=^Z eol=\0 | |
12 | reprint=^R discard=^U werase=^W lnext=^V | |
13 | eol2=\0 | |
14 | */ | |
15 | #define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0" | |
16 | ||
17 | /* | |
18 | * Translate a "termio" structure into a "termios". Ugh. | |
19 | */ | |
20 | static inline int user_termio_to_kernel_termios(struct ktermios *termios, | |
21 | const struct termio __user *termio) | |
22 | { | |
23 | unsigned short tmp; | |
24 | ||
25 | if (get_user(tmp, &termio->c_iflag) < 0) | |
26 | goto fault; | |
27 | termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp; | |
28 | ||
29 | if (get_user(tmp, &termio->c_oflag) < 0) | |
30 | goto fault; | |
31 | termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp; | |
32 | ||
33 | if (get_user(tmp, &termio->c_cflag) < 0) | |
34 | goto fault; | |
35 | termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp; | |
36 | ||
37 | if (get_user(tmp, &termio->c_lflag) < 0) | |
38 | goto fault; | |
39 | termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp; | |
40 | ||
41 | if (get_user(termios->c_line, &termio->c_line) < 0) | |
42 | goto fault; | |
43 | ||
44 | if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0) | |
45 | goto fault; | |
46 | ||
47 | return 0; | |
48 | ||
49 | fault: | |
50 | return -EFAULT; | |
51 | } | |
52 | ||
53 | /* | |
54 | * Translate a "termios" structure into a "termio". Ugh. | |
55 | */ | |
56 | static inline int kernel_termios_to_user_termio(struct termio __user *termio, | |
57 | struct ktermios *termios) | |
58 | { | |
59 | if (put_user(termios->c_iflag, &termio->c_iflag) < 0 || | |
60 | put_user(termios->c_oflag, &termio->c_oflag) < 0 || | |
61 | put_user(termios->c_cflag, &termio->c_cflag) < 0 || | |
62 | put_user(termios->c_lflag, &termio->c_lflag) < 0 || | |
63 | put_user(termios->c_line, &termio->c_line) < 0 || | |
64 | copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0) | |
65 | return -EFAULT; | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
70 | #ifdef TCGETS2 | |
71 | static inline int user_termios_to_kernel_termios(struct ktermios *k, | |
72 | struct termios2 __user *u) | |
73 | { | |
74 | return copy_from_user(k, u, sizeof(struct termios2)); | |
75 | } | |
76 | ||
77 | static inline int kernel_termios_to_user_termios(struct termios2 __user *u, | |
78 | struct ktermios *k) | |
79 | { | |
80 | return copy_to_user(u, k, sizeof(struct termios2)); | |
81 | } | |
82 | ||
83 | static inline int user_termios_to_kernel_termios_1(struct ktermios *k, | |
84 | struct termios __user *u) | |
85 | { | |
86 | return copy_from_user(k, u, sizeof(struct termios)); | |
87 | } | |
88 | ||
89 | static inline int kernel_termios_to_user_termios_1(struct termios __user *u, | |
90 | struct ktermios *k) | |
91 | { | |
92 | return copy_to_user(u, k, sizeof(struct termios)); | |
93 | } | |
94 | #else /* TCGETS2 */ | |
95 | static inline int user_termios_to_kernel_termios(struct ktermios *k, | |
96 | struct termios __user *u) | |
97 | { | |
98 | return copy_from_user(k, u, sizeof(struct termios)); | |
99 | } | |
100 | ||
101 | static inline int kernel_termios_to_user_termios(struct termios __user *u, | |
102 | struct ktermios *k) | |
103 | { | |
104 | return copy_to_user(u, k, sizeof(struct termios)); | |
105 | } | |
106 | #endif /* TCGETS2 */ | |
107 | ||
6103ec56 | 108 | #endif /* _ASM_GENERIC_TERMIOS_H */ |