49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
/*
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* fs/partitions/ultrix.c
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*
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* Code extracted from drivers/block/genhd.c
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*
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* Re-organised Jul 1999 Russell King
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*/
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#include "check.h"
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#include "ultrix.h"
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int ultrix_partition(struct parsed_partitions *state, struct block_device *bdev)
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{
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int i;
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Sector sect;
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unsigned char *data;
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struct ultrix_disklabel {
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s32 pt_magic; /* magic no. indicating part. info exits */
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s32 pt_valid; /* set by driver if pt is current */
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struct pt_info {
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s32 pi_nblocks; /* no. of sectors */
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u32 pi_blkoff; /* block offset for start */
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} pt_part[8];
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} *label;
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#define PT_MAGIC 0x032957 /* Partition magic number */
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#define PT_VALID 1 /* Indicates if struct is valid */
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data = read_dev_sector(bdev, (16384 - sizeof(*label))/512, §);
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if (!data)
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return -1;
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label = (struct ultrix_disklabel *)(data + 512 - sizeof(*label));
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if (label->pt_magic == PT_MAGIC && label->pt_valid == PT_VALID) {
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for (i=0; i<8; i++)
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if (label->pt_part[i].pi_nblocks)
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put_partition(state, i+1,
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label->pt_part[i].pi_blkoff,
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label->pt_part[i].pi_nblocks);
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put_dev_sector(sect);
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printk ("\n");
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return 1;
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} else {
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put_dev_sector(sect);
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return 0;
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}
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}
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