projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| eb616ef0 CT |
1 | /* |
| 2 | * Copyright (c) 1992 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This software was developed by the Computer Systems Engineering group | |
| 6 | * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and | |
| 7 | * contributed to Berkeley. | |
| 8 | * | |
| 9 | * %sccs.include.redist.c% | |
| 10 | * | |
| 11 | * @(#)sun_disklabel.c 7.1 (Berkeley) %G% | |
| 12 | * | |
| 13 | * from: $Header: sun_disklabel.c,v 1.5 92/06/17 07:04:12 torek Exp $ | |
| 14 | */ | |
| 15 | ||
| 16 | /* | |
| 17 | * SunOS disk label code. | |
| 18 | */ | |
| 19 | ||
| 20 | #include "sys/param.h" | |
| 21 | #include "sys/disklabel.h" | |
| 22 | #include "sys/device.h" | |
| 23 | #include "sys/disk.h" | |
| 24 | #include "sys/ioctl.h" | |
| 25 | ||
| 26 | #include "sun_disklabel.h" | |
| 27 | ||
| 28 | /* | |
| 29 | * Take a sector (cp) containing a SunOS disk label and set lp to a BSD | |
| 30 | * disk label. | |
| 31 | */ | |
| 32 | int | |
| 33 | sun_disklabel(cp, lp) | |
| 34 | register caddr_t cp; | |
| 35 | register struct disklabel *lp; | |
| 36 | { | |
| 37 | register u_short *sp; | |
| 38 | register struct sun_disklabel *sl; | |
| 39 | register int i, v; | |
| 40 | ||
| 41 | sp = (u_short *)(cp + sizeof(struct sun_disklabel)); | |
| 42 | --sp; | |
| 43 | v = 0; | |
| 44 | while (sp >= (u_short *)cp) | |
| 45 | v ^= *sp--; | |
| 46 | if (v) | |
| 47 | return (0); | |
| 48 | sl = (struct sun_disklabel *)cp; | |
| 49 | lp->d_magic = 0; /* denote as pseudo */ | |
| 50 | lp->d_ncylinders = sl->sl_ncylinders; | |
| 51 | lp->d_acylinders = sl->sl_acylinders; | |
| 52 | v = (lp->d_ntracks = sl->sl_ntracks) * | |
| 53 | (lp->d_nsectors = sl->sl_nsectors); | |
| 54 | lp->d_secpercyl = v; | |
| 55 | lp->d_npartitions = 8; | |
| 56 | for (i = 0; i < 8; i++) { | |
| 57 | lp->d_partitions[i].p_offset = | |
| 58 | sl->sl_part[i].sdkp_cyloffset * v; | |
| 59 | lp->d_partitions[i].p_size = sl->sl_part[i].sdkp_nsectors; | |
| 60 | } | |
| 61 | return (1); | |
| 62 | } | |
| 63 | ||
| 64 | int | |
| 65 | sun_dkioctl(dk, cmd, data, partition) | |
| 66 | struct dkdevice *dk; | |
| 67 | int cmd; | |
| 68 | caddr_t data; | |
| 69 | int partition; | |
| 70 | { | |
| 71 | register struct partition *p; | |
| 72 | ||
| 73 | switch (cmd) { | |
| 74 | ||
| 75 | case DKIOCGGEOM: | |
| 76 | #define geom ((struct sun_dkgeom *)data) | |
| 77 | bzero(data, sizeof(*geom)); | |
| 78 | geom->sdkc_ncylinders = dk->dk_label.d_ncylinders; | |
| 79 | geom->sdkc_acylinders = dk->dk_label.d_acylinders; | |
| 80 | geom->sdkc_ntracks = dk->dk_label.d_ntracks; | |
| 81 | geom->sdkc_nsectors = dk->dk_label.d_nsectors; | |
| 82 | geom->sdkc_interleave = dk->dk_label.d_interleave; | |
| 83 | geom->sdkc_sparespercyl = dk->dk_label.d_sparespercyl; | |
| 84 | geom->sdkc_rpm = dk->dk_label.d_rpm; | |
| 85 | geom->sdkc_pcylinders = | |
| 86 | dk->dk_label.d_ncylinders + dk->dk_label.d_acylinders; | |
| 87 | #undef geom | |
| 88 | break; | |
| 89 | ||
| 90 | case DKIOCINFO: | |
| 91 | /* Homey don't do DKIOCINFO */ | |
| 92 | bzero(data, sizeof(struct sun_dkctlr)); | |
| 93 | break; | |
| 94 | ||
| 95 | case DKIOCGPART: | |
| 96 | if (dk->dk_label.d_secpercyl == 0) | |
| 97 | return (ERANGE); /* XXX */ | |
| 98 | p = &dk->dk_label.d_partitions[partition]; | |
| 99 | if (p->p_offset % dk->dk_label.d_secpercyl != 0) | |
| 100 | return (ERANGE); /* XXX */ | |
| 101 | #define part ((struct sun_dkpart *)data) | |
| 102 | part->sdkp_cyloffset = p->p_offset / dk->dk_label.d_secpercyl; | |
| 103 | part->sdkp_nsectors = p->p_size; | |
| 104 | #undef part | |
| 105 | break; | |
| 106 | ||
| 107 | default: | |
| 108 | return (-1); | |
| 109 | } | |
| 110 | return (0); | |
| 111 | } |