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/* SPDX-License-Identifier: GPL-2.0 */
/* termios.h: generic termios/termio user copying/translation
*/
#ifndef _ASM_GENERIC_TERMIOS_BASE_H
#define _ASM_GENERIC_TERMIOS_BASE_H
#include <linux/uaccess.h>
#ifndef __ARCH_TERMIO_GETPUT
/*
* Translate a "termio" structure into a "termios". Ugh.
*/
static inline int user_termio_to_kernel_termios(struct ktermios *termios,
struct termio __user *termio)
{
unsigned short tmp;
if (get_user(tmp, &termio->c_iflag) < 0)
goto fault;
termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
if (get_user(tmp, &termio->c_oflag) < 0)
goto fault;
termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
if (get_user(tmp, &termio->c_cflag) < 0)
goto fault;
termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
if (get_user(tmp, &termio->c_lflag) < 0)
goto fault;
termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
if (get_user(termios->c_line, &termio->c_line) < 0)
goto fault;
if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
goto fault;
return 0;
fault:
return -EFAULT;
}
/*
* Translate a "termios" structure into a "termio". Ugh.
*/
static inline int kernel_termios_to_user_termio(struct termio __user *termio,
struct ktermios *termios)
{
if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
put_user(termios->c_line, &termio->c_line) < 0 ||
copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
return -EFAULT;
return 0;
}
#ifndef user_termios_to_kernel_termios
#define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))
#endif
#ifndef kernel_termios_to_user_termios
#define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))
#endif
#define user_termios_to_kernel_termios_1(k, u) copy_from_user(k, u, sizeof(struct termios))
#define kernel_termios_to_user_termios_1(u, k) copy_to_user(u, k, sizeof(struct termios))
#endif /* __ARCH_TERMIO_GETPUT */
#endif /* _ASM_GENERIC_TERMIOS_BASE_H */
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