Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* termios.h: generic termios/termio user copying/translation |
3 | */ | |
4 | ||
63b852a6 AB |
5 | #ifndef _ASM_GENERIC_TERMIOS_BASE_H |
6 | #define _ASM_GENERIC_TERMIOS_BASE_H | |
1da177e4 | 7 | |
7c0f6ba6 | 8 | #include <linux/uaccess.h> |
1da177e4 LT |
9 | |
10 | #ifndef __ARCH_TERMIO_GETPUT | |
11 | ||
12 | /* | |
13 | * Translate a "termio" structure into a "termios". Ugh. | |
14 | */ | |
606d099c | 15 | static inline int user_termio_to_kernel_termios(struct ktermios *termios, |
1da177e4 LT |
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 | */ | |
51 | static inline int kernel_termios_to_user_termio(struct termio __user *termio, | |
606d099c | 52 | struct ktermios *termios) |
1da177e4 LT |
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 | ||
aa7738a5 | 65 | #ifndef user_termios_to_kernel_termios |
1da177e4 | 66 | #define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios)) |
aa7738a5 HC |
67 | #endif |
68 | ||
69 | #ifndef kernel_termios_to_user_termios | |
1da177e4 | 70 | #define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios)) |
aa7738a5 HC |
71 | #endif |
72 | ||
b0052fca PM |
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)) | |
1da177e4 LT |
75 | |
76 | #endif /* __ARCH_TERMIO_GETPUT */ | |
77 | ||
63b852a6 | 78 | #endif /* _ASM_GENERIC_TERMIOS_BASE_H */ |