blob: 92e810826b01f37eb6a666f8133767815878d89c [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001// SPDX-License-Identifier: GPL-2.0
Philippe De Muyter19d0e8c2007-05-08 00:29:15 -07002/*
3 * fs/partitions/sysv68.c
4 *
5 * Copyright (C) 2007 Philippe De Muyter <phdm@macqel.be>
6 */
7
8#include "check.h"
9#include "sysv68.h"
10
11/*
12 * Volume ID structure: on first 256-bytes sector of disk
13 */
14
15struct volumeid {
16 u8 vid_unused[248];
17 u8 vid_mac[8]; /* ASCII string "MOTOROLA" */
18};
19
20/*
21 * config block: second 256-bytes sector on disk
22 */
23
24struct dkconfig {
25 u8 ios_unused0[128];
26 __be32 ios_slcblk; /* Slice table block number */
27 __be16 ios_slccnt; /* Number of entries in slice table */
28 u8 ios_unused1[122];
29};
30
31/*
32 * combined volumeid and dkconfig block
33 */
34
35struct dkblk0 {
36 struct volumeid dk_vid;
37 struct dkconfig dk_ios;
38};
39
40/*
41 * Slice Table Structure
42 */
43
44struct slice {
45 __be32 nblocks; /* slice size (in blocks) */
46 __be32 blkoff; /* block offset of slice */
47};
48
49
Tejun Heo1493bf22010-05-15 20:09:30 +020050int sysv68_partition(struct parsed_partitions *state)
Philippe De Muyter19d0e8c2007-05-08 00:29:15 -070051{
52 int i, slices;
53 int slot = 1;
54 Sector sect;
55 unsigned char *data;
56 struct dkblk0 *b;
57 struct slice *slice;
Alexey Dobriyan9c867fb2010-08-10 18:03:14 -070058 char tmp[64];
Philippe De Muyter19d0e8c2007-05-08 00:29:15 -070059
Tejun Heo1493bf22010-05-15 20:09:30 +020060 data = read_part_sector(state, 0, &sect);
Philippe De Muyter19d0e8c2007-05-08 00:29:15 -070061 if (!data)
62 return -1;
63
64 b = (struct dkblk0 *)data;
65 if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) {
66 put_dev_sector(sect);
67 return 0;
68 }
69 slices = be16_to_cpu(b->dk_ios.ios_slccnt);
70 i = be32_to_cpu(b->dk_ios.ios_slcblk);
71 put_dev_sector(sect);
72
Tejun Heo1493bf22010-05-15 20:09:30 +020073 data = read_part_sector(state, i, &sect);
Philippe De Muyter19d0e8c2007-05-08 00:29:15 -070074 if (!data)
75 return -1;
76
77 slices -= 1; /* last slice is the whole disk */
Alexey Dobriyan9c867fb2010-08-10 18:03:14 -070078 snprintf(tmp, sizeof(tmp), "sysV68: %s(s%u)", state->name, slices);
79 strlcat(state->pp_buf, tmp, PAGE_SIZE);
Philippe De Muyter19d0e8c2007-05-08 00:29:15 -070080 slice = (struct slice *)data;
81 for (i = 0; i < slices; i++, slice++) {
82 if (slot == state->limit)
83 break;
84 if (be32_to_cpu(slice->nblocks)) {
85 put_partition(state, slot,
86 be32_to_cpu(slice->blkoff),
87 be32_to_cpu(slice->nblocks));
Alexey Dobriyan9c867fb2010-08-10 18:03:14 -070088 snprintf(tmp, sizeof(tmp), "(s%u)", i);
89 strlcat(state->pp_buf, tmp, PAGE_SIZE);
Philippe De Muyter19d0e8c2007-05-08 00:29:15 -070090 }
91 slot++;
92 }
Alexey Dobriyan9c867fb2010-08-10 18:03:14 -070093 strlcat(state->pp_buf, "\n", PAGE_SIZE);
Philippe De Muyter19d0e8c2007-05-08 00:29:15 -070094 put_dev_sector(sect);
95 return 1;
96}