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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"
#ifdef CONFIG_ALL_PPC
extern void note_bootable_part(kdev_t dev, int part, int goodness);
#endif
/*
* Code to understand MacOS partition tables.
*/
static inline void mac_fix_string(char *stg, int len)
{
int i;
for (i = len - 1; i >= 0 && stg[i] == ' '; i--)
stg[i] = 0;
}
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;
#ifdef CONFIG_ALL_PPC
int found_root = 0;
int found_root_goodness = 0;
#endif
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));
#ifdef CONFIG_ALL_PPC
/*
* If this is the first bootable partition, tell the
* setup code, in case it wants to make this the root.
*/
if (_machine == _MACH_Pmac) {
int goodness = 0;
mac_fix_string(part->processor, 16);
mac_fix_string(part->name, 32);
mac_fix_string(part->type, 32);
if ((be32_to_cpu(part->status) & MAC_STATUS_BOOTABLE)
&& strcasecmp(part->processor, "powerpc") == 0)
goodness++;
if (strcasecmp(part->type, "Apple_UNIX_SVR2") == 0
|| (strnicmp(part->type, "Linux", 5) == 0
&& strcasecmp(part->type, "Linux_swap") != 0)) {
int i, l;
goodness++;
l = strlen(part->name);
if (strcmp(part->name, "/") == 0)
goodness++;
for (i = 0; i <= l - 4; ++i) {
if (strnicmp(part->name + i, "root",
4) == 0) {
goodness += 2;
break;
}
}
if (strnicmp(part->name, "swap", 4) == 0)
goodness--;
}
if (goodness > found_root_goodness) {
found_root = blk;
found_root_goodness = goodness;
}
}
#endif /* CONFIG_ALL_PPC */
++first_part_minor;
}
#ifdef CONFIG_ALL_PPC
if (found_root_goodness)
note_bootable_part(to_kdev_t(bdev->bd_dev),
found_root, found_root_goodness);
#endif
put_dev_sector(sect);
printk("\n");
return 1;
}
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