1493bf217f
Make the following changes to partition check code. * Add ->bdev to struct parsed_partitions. * Introduce read_part_sector() which is a simple wrapper around read_dev_sector() which takes struct parsed_partitions *state instead of @bdev. * For functions which used to take @state and @bdev, drop @bdev. For functions which used to take @bdev, replace it with @state. * While updating, drop superflous checks on NULL state/bdev in ldm.c. This cleans up the API a bit and enables better handling of IO errors during partition check as the generic partition check code now has much better visibility into what went wrong in the low level code paths. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ben Hutchings <ben@decadent.org.uk> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
92 lines
1.7 KiB
C
92 lines
1.7 KiB
C
/*
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* fs/partitions/sysv68.c
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*
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* Copyright (C) 2007 Philippe De Muyter <phdm@macqel.be>
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*/
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#include "check.h"
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#include "sysv68.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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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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printk("sysV68: %s(s%u)", state->name, slices);
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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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printk("(s%u)", i);
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}
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slot++;
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}
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printk("\n");
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put_dev_sector(sect);
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return 1;
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}
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