projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 */ |