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// SPDX-License-Identifier: GPL-2.0 /* * fs/partitions/sysv68.c * * Copyright (C) 2007 Philippe De Muyter <phdm@macqel.be> */ #include "check.h" /* * Volume ID structure: on first 256-bytes sector of disk */ struct volumeid { u8 vid_unused[248]; u8 vid_mac[8]; /* ASCII string "MOTOROLA" */ }; /* * config block: second 256-bytes sector on disk */ struct dkconfig { u8 ios_unused0[128]; __be32 ios_slcblk; /* Slice table block number */ __be16 ios_slccnt; /* Number of entries in slice table */ u8 ios_unused1[122]; }; /* * combined volumeid and dkconfig block */ struct dkblk0 { struct volumeid dk_vid; struct dkconfig dk_ios; }; /* * Slice Table Structure */ struct slice { __be32 nblocks; /* slice size (in blocks) */ __be32 blkoff; /* block offset of slice */ }; int sysv68_partition(struct parsed_partitions *state) { int i, slices; int slot = 1; Sector sect; unsigned char *data; struct dkblk0 *b; struct slice *slice; char tmp[64]; data = read_part_sector(state, 0, §); if (!data) return -1; b = (struct dkblk0 *)data; if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) { put_dev_sector(sect); return 0; } slices = be16_to_cpu(b->dk_ios.ios_slccnt); i = be32_to_cpu(b->dk_ios.ios_slcblk); put_dev_sector(sect); data = read_part_sector(state, i, §); if (!data) return -1; slices -= 1; /* last slice is the whole disk */ snprintf(tmp, sizeof(tmp), "sysV68: %s(s%u)", state->name, slices); strlcat(state->pp_buf, tmp, PAGE_SIZE); slice = (struct slice *)data; for (i = 0; i < slices; i++, slice++) { if (slot == state->limit) break; if (be32_to_cpu(slice->nblocks)) { put_partition(state, slot, be32_to_cpu(slice->blkoff), be32_to_cpu(slice->nblocks)); snprintf(tmp, sizeof(tmp), "(s%u)", i); strlcat(state->pp_buf, tmp, PAGE_SIZE); } slot++; } strlcat(state->pp_buf, "\n", PAGE_SIZE); put_dev_sector(sect); return 1; } |