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Annotation of 43BSDTahoe/sys/stand/dev.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  *
        !            17:  *     @(#)dev.c       7.4 (Berkeley) 6/29/88
        !            18:  */
        !            19: 
        !            20: #include "param.h"
        !            21: #include "inode.h"
        !            22: #include "fs.h"
        !            23: #include "saio.h"
        !            24: 
        !            25: /*
        !            26:  * NB: the value "io->i_ino.i_dev", used to offset the devsw[] array
        !            27:  * in the routines below, is munged by the vaxstand Makefile to work
        !            28:  * for certain boots.
        !            29:  */
        !            30: 
        !            31: devread(io)
        !            32:        register struct iob *io;
        !            33: {
        !            34:        int cc;
        !            35: 
        !            36:        io->i_flgs |= F_RDDATA;
        !            37:        io->i_error = 0;
        !            38:        cc = (*devsw[io->i_ino.i_dev].dv_strategy)(io, READ);
        !            39:        io->i_flgs &= ~F_TYPEMASK;
        !            40:        return (cc);
        !            41: }
        !            42: 
        !            43: devwrite(io)
        !            44:        register struct iob *io;
        !            45: {
        !            46:        int cc;
        !            47: 
        !            48:        io->i_flgs |= F_WRDATA;
        !            49:        io->i_error = 0;
        !            50:        cc = (*devsw[io->i_ino.i_dev].dv_strategy)(io, WRITE);
        !            51:        io->i_flgs &= ~F_TYPEMASK;
        !            52:        return (cc);
        !            53: }
        !            54: 
        !            55: devopen(io)
        !            56:        register struct iob *io;
        !            57: {
        !            58:        int ret;
        !            59: 
        !            60:        if (!(ret = (*devsw[io->i_ino.i_dev].dv_open)(io)))
        !            61:                return (0);
        !            62:        printf("%s(%d,%d,%d,%d): ", devsw[io->i_ino.i_dev].dv_name,
        !            63:                io->i_adapt, io->i_ctlr, io->i_unit, io->i_part);
        !            64:        switch(ret) {
        !            65:        case EIO:
        !            66:                break;          /* already reported */
        !            67:        case EADAPT:
        !            68:                printf("bad adaptor number\n");
        !            69:                break;
        !            70:        case ECTLR:
        !            71:                printf("bad controller number\n");
        !            72:                break;
        !            73:        case EUNIT:
        !            74:                printf("bad drive number\n");
        !            75:                break;
        !            76:        case EPART:
        !            77:                printf("bad partition\n");
        !            78:                break;
        !            79:        case ERDLAB:
        !            80:                printf("can't read disk label\n");
        !            81:                break;
        !            82:        case EUNLAB:
        !            83:                printf("unlabeled\n");
        !            84:                break;
        !            85:        case ENXIO:
        !            86:                printf("bad device specification\n");
        !            87:                break;
        !            88:        default:
        !            89:                printf("unknown open error\n");
        !            90:                break;
        !            91:        }
        !            92:        return (ret);
        !            93: }
        !            94: 
        !            95: devclose(io)
        !            96:        register struct iob *io;
        !            97: {
        !            98:        (*devsw[io->i_ino.i_dev].dv_close)(io);
        !            99: }
        !           100: 
        !           101: devioctl(io, cmd, arg)
        !           102:        register struct iob *io;
        !           103:        int cmd;
        !           104:        caddr_t arg;
        !           105: {
        !           106:        return ((*devsw[io->i_ino.i_dev].dv_ioctl)(io, cmd, arg));
        !           107: }
        !           108: 
        !           109: /*ARGSUSED*/
        !           110: nullsys(io)
        !           111:        struct iob *io;
        !           112: {}
        !           113: 
        !           114: /*ARGSUSED*/
        !           115: nodev(io)
        !           116:        struct iob *io;
        !           117: {
        !           118:        errno = EBADF;
        !           119: }
        !           120: 
        !           121: /*ARGSUSED*/
        !           122: noioctl(io, cmd, arg)
        !           123:        struct iob *io;
        !           124:        int cmd;
        !           125:        caddr_t arg;
        !           126: {
        !           127:        return (ECMD);
        !           128: }

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