1 // SPDX-License-Identifier: GPL-2.0
3 * fs/partitions/sysv68.c
12 * Volume ID structure: on first 256-bytes sector of disk
17 u8 vid_mac[8]; /* ASCII string "MOTOROLA" */
21 * config block: second 256-bytes sector on disk
26 __be32 ios_slcblk; /* Slice table block number */
27 __be16 ios_slccnt; /* Number of entries in slice table */
32 * combined volumeid and dkconfig block
36 struct volumeid dk_vid;
37 struct dkconfig dk_ios;
41 * Slice Table Structure
45 __be32 nblocks; /* slice size (in blocks) */
46 __be32 blkoff; /* block offset of slice */
50 int sysv68_partition(struct parsed_partitions *state)
60 data = read_part_sector(state, 0, §);
64 b = (struct dkblk0 *)data;
65 if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) {
69 slices = be16_to_cpu(b->dk_ios.ios_slccnt);
70 i = be32_to_cpu(b->dk_ios.ios_slcblk);
73 data = read_part_sector(state, i, §);
77 slices -= 1; /* last slice is the whole disk */
78 snprintf(tmp, sizeof(tmp), "sysV68: %s(s%u)", state->name, slices);
79 strlcat(state->pp_buf, tmp, PAGE_SIZE);
80 slice = (struct slice *)data;
81 for (i = 0; i < slices; i++, slice++) {
82 if (slot == state->limit)
84 if (be32_to_cpu(slice->nblocks)) {
85 put_partition(state, slot,
86 be32_to_cpu(slice->blkoff),
87 be32_to_cpu(slice->nblocks));
88 snprintf(tmp, sizeof(tmp), "(s%u)", i);
89 strlcat(state->pp_buf, tmp, PAGE_SIZE);
93 strlcat(state->pp_buf, "\n", PAGE_SIZE);