/* * fs/partitions/sysv68.c * * Copyright (C) 2007 Philippe De Muyter <phdm@macqel.be> */ #include "check.h" #include "sysv68.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, struct block_device *bdev) { int i, slices; int slot = 1; Sector sect; unsigned char *data; struct dkblk0 *b; struct slice *slice; data = read_dev_sector(bdev, 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_dev_sector(bdev, i, §); if (!data) return -1; slices -= 1; /* last slice is the whole disk */ printk("sysV68: %s(s%u)", state->name, slices); 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)); printk("(s%u)", i); } slot++; } printk("\n"); put_dev_sector(sect); return 1; }