1 // SPDX-License-Identifier: GPL-2.0
3 * fs/partitions/sysv68.c
5 * Copyright (C) 2007 Philippe De Muyter <phdm@macqel.be>
11 * Volume ID structure: on first 256-bytes sector of disk
16 u8 vid_mac[8]; /* ASCII string "MOTOROLA" */
20 * config block: second 256-bytes sector on disk
25 __be32 ios_slcblk; /* Slice table block number */
26 __be16 ios_slccnt; /* Number of entries in slice table */
31 * combined volumeid and dkconfig block
35 struct volumeid dk_vid;
36 struct dkconfig dk_ios;
40 * Slice Table Structure
44 __be32 nblocks; /* slice size (in blocks) */
45 __be32 blkoff; /* block offset of slice */
49 int sysv68_partition(struct parsed_partitions *state)
59 data = read_part_sector(state, 0, §);
63 b = (struct dkblk0 *)data;
64 if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) {
68 slices = be16_to_cpu(b->dk_ios.ios_slccnt);
69 i = be32_to_cpu(b->dk_ios.ios_slcblk);
72 data = read_part_sector(state, i, §);
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)
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);
92 strlcat(state->pp_buf, "\n", PAGE_SIZE);