cregit-Linux how code gets into the kernel

Release 4.14 arch/sparc/include/asm/termios.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _SPARC_TERMIOS_H

#define _SPARC_TERMIOS_H

#include <uapi/asm/termios.h>


/*
 * c_cc characters in the termio structure.  Oh, how I love being
 * backwardly compatible.  Notice that character 4 and 5 are
 * interpreted differently depending on whether ICANON is set in
 * c_lflag.  If it's set, they are used as _VEOF and _VEOL, otherwise
 * as _VMIN and V_TIME.  This is for compatibility with OSF/1 (which
 * is compatible with sysV)...
 */

#define _VMIN	4

#define _VTIME	5

/*      intr=^C         quit=^\         erase=del       kill=^U
        eof=^D          eol=\0          eol2=\0         sxtc=\0
        start=^Q        stop=^S         susp=^Z         dsusp=^Y
        reprint=^R      discard=^U      werase=^W       lnext=^V
        vmin=\1         vtime=\0
*/

#define INIT_C_CC "\003\034\177\025\004\000\000\000\021\023\032\031\022\025\027\026\001"

/*
 * Translate a "termio" structure into a "termios". Ugh.
 */

#define user_termio_to_kernel_termios(termios, termio) \
({ \
        unsigned short tmp; \
        int err; \
        err = get_user(tmp, &(termio)->c_iflag); \
        (termios)->c_iflag = (0xffff0000 & ((termios)->c_iflag)) | tmp; \
        err |= get_user(tmp, &(termio)->c_oflag); \
        (termios)->c_oflag = (0xffff0000 & ((termios)->c_oflag)) | tmp; \
        err |= get_user(tmp, &(termio)->c_cflag); \
        (termios)->c_cflag = (0xffff0000 & ((termios)->c_cflag)) | tmp; \
        err |= get_user(tmp, &(termio)->c_lflag); \
        (termios)->c_lflag = (0xffff0000 & ((termios)->c_lflag)) | tmp; \
        err |= copy_from_user((termios)->c_cc, (termio)->c_cc, NCC); \
        err; \
})

/*
 * Translate a "termios" structure into a "termio". Ugh.
 *
 * Note the "fun" _VMIN overloading.
 */

#define kernel_termios_to_user_termio(termio, termios) \
({ \
        int err; \
        err  = put_user((termios)->c_iflag, &(termio)->c_iflag); \
        err |= put_user((termios)->c_oflag, &(termio)->c_oflag); \
        err |= put_user((termios)->c_cflag, &(termio)->c_cflag); \
        err |= put_user((termios)->c_lflag, &(termio)->c_lflag); \
        err |= put_user((termios)->c_line,  &(termio)->c_line); \
        err |= copy_to_user((termio)->c_cc, (termios)->c_cc, NCC); \
        if (!((termios)->c_lflag & ICANON)) { \
                err |= put_user((termios)->c_cc[VMIN], &(termio)->c_cc[_VMIN]); \
                err |= put_user((termios)->c_cc[VTIME], &(termio)->c_cc[_VTIME]); \
        } \
        err; \
})


#define user_termios_to_kernel_termios(k, u) \
({ \
        int err; \
        err  = get_user((k)->c_iflag, &(u)->c_iflag); \
        err |= get_user((k)->c_oflag, &(u)->c_oflag); \
        err |= get_user((k)->c_cflag, &(u)->c_cflag); \
        err |= get_user((k)->c_lflag, &(u)->c_lflag); \
        err |= get_user((k)->c_line,  &(u)->c_line); \
        err |= copy_from_user((k)->c_cc, (u)->c_cc, NCCS); \
        if ((k)->c_lflag & ICANON) { \
                err |= get_user((k)->c_cc[VEOF], &(u)->c_cc[VEOF]); \
                err |= get_user((k)->c_cc[VEOL], &(u)->c_cc[VEOL]); \
        } else { \
                err |= get_user((k)->c_cc[VMIN],  &(u)->c_cc[_VMIN]); \
                err |= get_user((k)->c_cc[VTIME], &(u)->c_cc[_VTIME]); \
        } \
        err |= get_user((k)->c_ispeed,  &(u)->c_ispeed); \
        err |= get_user((k)->c_ospeed,  &(u)->c_ospeed); \
        err; \
})


#define kernel_termios_to_user_termios(u, k) \
({ \
        int err; \
        err  = put_user((k)->c_iflag, &(u)->c_iflag); \
        err |= put_user((k)->c_oflag, &(u)->c_oflag); \
        err |= put_user((k)->c_cflag, &(u)->c_cflag); \
        err |= put_user((k)->c_lflag, &(u)->c_lflag); \
        err |= put_user((k)->c_line, &(u)->c_line); \
        err |= copy_to_user((u)->c_cc, (k)->c_cc, NCCS); \
        if (!((k)->c_lflag & ICANON)) { \
                err |= put_user((k)->c_cc[VMIN],  &(u)->c_cc[_VMIN]); \
                err |= put_user((k)->c_cc[VTIME], &(u)->c_cc[_VTIME]); \
        } else { \
                err |= put_user((k)->c_cc[VEOF], &(u)->c_cc[VEOF]); \
                err |= put_user((k)->c_cc[VEOL], &(u)->c_cc[VEOL]); \
        } \
        err |= put_user((k)->c_ispeed, &(u)->c_ispeed); \
        err |= put_user((k)->c_ospeed, &(u)->c_ospeed); \
        err; \
})


#define user_termios_to_kernel_termios_1(k, u) \
({ \
        int err; \
        err  = get_user((k)->c_iflag, &(u)->c_iflag); \
        err |= get_user((k)->c_oflag, &(u)->c_oflag); \
        err |= get_user((k)->c_cflag, &(u)->c_cflag); \
        err |= get_user((k)->c_lflag, &(u)->c_lflag); \
        err |= get_user((k)->c_line,  &(u)->c_line); \
        err |= copy_from_user((k)->c_cc, (u)->c_cc, NCCS); \
        if ((k)->c_lflag & ICANON) { \
                err |= get_user((k)->c_cc[VEOF], &(u)->c_cc[VEOF]); \
                err |= get_user((k)->c_cc[VEOL], &(u)->c_cc[VEOL]); \
        } else { \
                err |= get_user((k)->c_cc[VMIN],  &(u)->c_cc[_VMIN]); \
                err |= get_user((k)->c_cc[VTIME], &(u)->c_cc[_VTIME]); \
        } \
        err; \
})


#define kernel_termios_to_user_termios_1(u, k) \
({ \
        int err; \
        err  = put_user((k)->c_iflag, &(u)->c_iflag); \
        err |= put_user((k)->c_oflag, &(u)->c_oflag); \
        err |= put_user((k)->c_cflag, &(u)->c_cflag); \
        err |= put_user((k)->c_lflag, &(u)->c_lflag); \
        err |= put_user((k)->c_line, &(u)->c_line); \
        err |= copy_to_user((u)->c_cc, (k)->c_cc, NCCS); \
        if (!((k)->c_lflag & ICANON)) { \
                err |= put_user((k)->c_cc[VMIN],  &(u)->c_cc[_VMIN]); \
                err |= put_user((k)->c_cc[VTIME], &(u)->c_cc[_VTIME]); \
        } else { \
                err |= put_user((k)->c_cc[VEOF], &(u)->c_cc[VEOF]); \
                err |= put_user((k)->c_cc[VEOL], &(u)->c_cc[VEOL]); \
        } \
        err; \
})

#endif /* _SPARC_TERMIOS_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)6269.66%444.44%
David S. Miller2123.60%222.22%
Sam Ravnborg44.49%111.11%
Greg Kroah-Hartman11.12%111.11%
David Howells11.12%111.11%
Total89100.00%9100.00%
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