1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_GENERIC_TERMIOS_H
3 #define _ASM_GENERIC_TERMIOS_H
4
5
6 #include <linux/uaccess.h>
7 #include <uapi/asm-generic/termios.h>
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 */
user_termio_to_kernel_termios(struct ktermios * termios,const struct termio __user * termio)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 */
kernel_termios_to_user_termio(struct termio __user * termio,struct ktermios * termios)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
user_termios_to_kernel_termios(struct ktermios * k,struct termios2 __user * u)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
kernel_termios_to_user_termios(struct termios2 __user * u,struct ktermios * k)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
user_termios_to_kernel_termios_1(struct ktermios * k,struct termios __user * u)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
kernel_termios_to_user_termios_1(struct termios __user * u,struct ktermios * k)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 */
user_termios_to_kernel_termios(struct ktermios * k,struct termios __user * u)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
kernel_termios_to_user_termios(struct termios __user * u,struct ktermios * k)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
108 #endif /* _ASM_GENERIC_TERMIOS_H */
109