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[/] [or1k/] [tags/] [LINUX_2_4_26_OR32/] [linux/] [linux-2.4/] [fs/] [partitions/] [mac.c] - Rev 1765
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/* * fs/partitions/mac.c * * Code extracted from drivers/block/genhd.c * Copyright (C) 1991-1998 Linus Torvalds * Re-organised Feb 1998 Russell King */ #include <linux/config.h> #include <linux/fs.h> #include <linux/genhd.h> #include <linux/kernel.h> #include <linux/major.h> #include <linux/string.h> #include <linux/blk.h> #include <linux/ctype.h> #include <asm/system.h> #include "check.h" #include "mac.h" /* * Code to understand MacOS partition tables. */ int mac_partition(struct gendisk *hd, struct block_device *bdev, unsigned long fsec, int first_part_minor) { Sector sect; unsigned char *data; int blk, blocks_in_map; unsigned secsize; struct mac_partition *part; struct mac_driver_desc *md; /* Get 0th block and look at the first partition map entry. */ md = (struct mac_driver_desc *) read_dev_sector(bdev, 0, §); if (!md) return -1; if (be16_to_cpu(md->signature) != MAC_DRIVER_MAGIC) { put_dev_sector(sect); return 0; } secsize = be16_to_cpu(md->block_size); put_dev_sector(sect); data = read_dev_sector(bdev, secsize/512, §); if (!data) return -1; part = (struct mac_partition *) (data + secsize%512); if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC) { put_dev_sector(sect); return 0; /* not a MacOS disk */ } printk(" [mac]"); blocks_in_map = be32_to_cpu(part->map_count); for (blk = 1; blk <= blocks_in_map; ++blk) { int pos = blk * secsize; put_dev_sector(sect); data = read_dev_sector(bdev, pos/512, §); if (!data) return -1; part = (struct mac_partition *) (data + pos%512); if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC) break; add_gd_partition(hd, first_part_minor, fsec + be32_to_cpu(part->start_block) * (secsize/512), be32_to_cpu(part->block_count) * (secsize/512)); ++first_part_minor; } put_dev_sector(sect); printk("\n"); return 1; }