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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 | * | |
b480239a KB |
9 | * All advertising materials mentioning features or use of this software |
10 | * must display the following acknowledgement: | |
11 | * This product includes software developed by the University of | |
12 | * California, Lawrence Berkeley Laboratories. | |
13 | * | |
eb616ef0 CT |
14 | * %sccs.include.redist.c% |
15 | * | |
b480239a | 16 | * @(#)sun_disklabel.c 7.2 (Berkeley) %G% |
eb616ef0 CT |
17 | * |
18 | * from: $Header: sun_disklabel.c,v 1.5 92/06/17 07:04:12 torek Exp $ | |
19 | */ | |
20 | ||
21 | /* | |
22 | * SunOS disk label code. | |
23 | */ | |
24 | ||
25 | #include "sys/param.h" | |
26 | #include "sys/disklabel.h" | |
27 | #include "sys/device.h" | |
28 | #include "sys/disk.h" | |
29 | #include "sys/ioctl.h" | |
30 | ||
31 | #include "sun_disklabel.h" | |
32 | ||
33 | /* | |
34 | * Take a sector (cp) containing a SunOS disk label and set lp to a BSD | |
35 | * disk label. | |
36 | */ | |
37 | int | |
38 | sun_disklabel(cp, lp) | |
39 | register caddr_t cp; | |
40 | register struct disklabel *lp; | |
41 | { | |
42 | register u_short *sp; | |
43 | register struct sun_disklabel *sl; | |
44 | register int i, v; | |
45 | ||
46 | sp = (u_short *)(cp + sizeof(struct sun_disklabel)); | |
47 | --sp; | |
48 | v = 0; | |
49 | while (sp >= (u_short *)cp) | |
50 | v ^= *sp--; | |
51 | if (v) | |
52 | return (0); | |
53 | sl = (struct sun_disklabel *)cp; | |
54 | lp->d_magic = 0; /* denote as pseudo */ | |
55 | lp->d_ncylinders = sl->sl_ncylinders; | |
56 | lp->d_acylinders = sl->sl_acylinders; | |
57 | v = (lp->d_ntracks = sl->sl_ntracks) * | |
58 | (lp->d_nsectors = sl->sl_nsectors); | |
59 | lp->d_secpercyl = v; | |
60 | lp->d_npartitions = 8; | |
61 | for (i = 0; i < 8; i++) { | |
62 | lp->d_partitions[i].p_offset = | |
63 | sl->sl_part[i].sdkp_cyloffset * v; | |
64 | lp->d_partitions[i].p_size = sl->sl_part[i].sdkp_nsectors; | |
65 | } | |
66 | return (1); | |
67 | } | |
68 | ||
69 | int | |
70 | sun_dkioctl(dk, cmd, data, partition) | |
71 | struct dkdevice *dk; | |
72 | int cmd; | |
73 | caddr_t data; | |
74 | int partition; | |
75 | { | |
76 | register struct partition *p; | |
77 | ||
78 | switch (cmd) { | |
79 | ||
80 | case DKIOCGGEOM: | |
81 | #define geom ((struct sun_dkgeom *)data) | |
82 | bzero(data, sizeof(*geom)); | |
83 | geom->sdkc_ncylinders = dk->dk_label.d_ncylinders; | |
84 | geom->sdkc_acylinders = dk->dk_label.d_acylinders; | |
85 | geom->sdkc_ntracks = dk->dk_label.d_ntracks; | |
86 | geom->sdkc_nsectors = dk->dk_label.d_nsectors; | |
87 | geom->sdkc_interleave = dk->dk_label.d_interleave; | |
88 | geom->sdkc_sparespercyl = dk->dk_label.d_sparespercyl; | |
89 | geom->sdkc_rpm = dk->dk_label.d_rpm; | |
90 | geom->sdkc_pcylinders = | |
91 | dk->dk_label.d_ncylinders + dk->dk_label.d_acylinders; | |
92 | #undef geom | |
93 | break; | |
94 | ||
95 | case DKIOCINFO: | |
96 | /* Homey don't do DKIOCINFO */ | |
97 | bzero(data, sizeof(struct sun_dkctlr)); | |
98 | break; | |
99 | ||
100 | case DKIOCGPART: | |
101 | if (dk->dk_label.d_secpercyl == 0) | |
102 | return (ERANGE); /* XXX */ | |
103 | p = &dk->dk_label.d_partitions[partition]; | |
104 | if (p->p_offset % dk->dk_label.d_secpercyl != 0) | |
105 | return (ERANGE); /* XXX */ | |
106 | #define part ((struct sun_dkpart *)data) | |
107 | part->sdkp_cyloffset = p->p_offset / dk->dk_label.d_secpercyl; | |
108 | part->sdkp_nsectors = p->p_size; | |
109 | #undef part | |
110 | break; | |
111 | ||
112 | default: | |
113 | return (-1); | |
114 | } | |
115 | return (0); | |
116 | } |