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Annotation of 43BSDTahoe/sys/stand/dev.c, revision 1.1.1.1

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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