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