Linux 4.2.1
[linux/fpc-iii.git] / block / partitions / sysv68.c
blob9627ccffc1c44da0c312ed2b053092fe64ae0213
1 /*
2 * fs/partitions/sysv68.c
4 * Copyright (C) 2007 Philippe De Muyter <phdm@macqel.be>
5 */
7 #include "check.h"
8 #include "sysv68.h"
11 * Volume ID structure: on first 256-bytes sector of disk
14 struct volumeid {
15 u8 vid_unused[248];
16 u8 vid_mac[8]; /* ASCII string "MOTOROLA" */
20 * config block: second 256-bytes sector on disk
23 struct dkconfig {
24 u8 ios_unused0[128];
25 __be32 ios_slcblk; /* Slice table block number */
26 __be16 ios_slccnt; /* Number of entries in slice table */
27 u8 ios_unused1[122];
31 * combined volumeid and dkconfig block
34 struct dkblk0 {
35 struct volumeid dk_vid;
36 struct dkconfig dk_ios;
40 * Slice Table Structure
43 struct slice {
44 __be32 nblocks; /* slice size (in blocks) */
45 __be32 blkoff; /* block offset of slice */
49 int sysv68_partition(struct parsed_partitions *state)
51 int i, slices;
52 int slot = 1;
53 Sector sect;
54 unsigned char *data;
55 struct dkblk0 *b;
56 struct slice *slice;
57 char tmp[64];
59 data = read_part_sector(state, 0, &sect);
60 if (!data)
61 return -1;
63 b = (struct dkblk0 *)data;
64 if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) {
65 put_dev_sector(sect);
66 return 0;
68 slices = be16_to_cpu(b->dk_ios.ios_slccnt);
69 i = be32_to_cpu(b->dk_ios.ios_slcblk);
70 put_dev_sector(sect);
72 data = read_part_sector(state, i, &sect);
73 if (!data)
74 return -1;
76 slices -= 1; /* last slice is the whole disk */
77 snprintf(tmp, sizeof(tmp), "sysV68: %s(s%u)", state->name, slices);
78 strlcat(state->pp_buf, tmp, PAGE_SIZE);
79 slice = (struct slice *)data;
80 for (i = 0; i < slices; i++, slice++) {
81 if (slot == state->limit)
82 break;
83 if (be32_to_cpu(slice->nblocks)) {
84 put_partition(state, slot,
85 be32_to_cpu(slice->blkoff),
86 be32_to_cpu(slice->nblocks));
87 snprintf(tmp, sizeof(tmp), "(s%u)", i);
88 strlcat(state->pp_buf, tmp, PAGE_SIZE);
90 slot++;
92 strlcat(state->pp_buf, "\n", PAGE_SIZE);
93 put_dev_sector(sect);
94 return 1;