forked from Minki/linux
a08aa9bccd
Partition scanning only happens on the whole device, so pass a struct gendisk instead of the whole device block_device to the scanners. This allows to simplify printing the device name in various places as the disk name is available in disk->name. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Stefan Haberland <sth@linux.ibm.com> Link: https://lore.kernel.org/r/20210810154512.1809898-2-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
144 lines
3.6 KiB
C
144 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* 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/ctype.h>
|
|
#include "check.h"
|
|
#include "mac.h"
|
|
|
|
#ifdef CONFIG_PPC_PMAC
|
|
#include <asm/machdep.h>
|
|
extern void note_bootable_part(dev_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 parsed_partitions *state)
|
|
{
|
|
Sector sect;
|
|
unsigned char *data;
|
|
int slot, blocks_in_map;
|
|
unsigned secsize, datasize, partoffset;
|
|
#ifdef CONFIG_PPC_PMAC
|
|
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 = read_part_sector(state, 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);
|
|
datasize = round_down(secsize, 512);
|
|
data = read_part_sector(state, datasize / 512, §);
|
|
if (!data)
|
|
return -1;
|
|
partoffset = secsize % 512;
|
|
if (partoffset + sizeof(*part) > datasize)
|
|
return -1;
|
|
part = (struct mac_partition *) (data + partoffset);
|
|
if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC) {
|
|
put_dev_sector(sect);
|
|
return 0; /* not a MacOS disk */
|
|
}
|
|
blocks_in_map = be32_to_cpu(part->map_count);
|
|
if (blocks_in_map < 0 || blocks_in_map >= DISK_MAX_PARTS) {
|
|
put_dev_sector(sect);
|
|
return 0;
|
|
}
|
|
|
|
if (blocks_in_map >= state->limit)
|
|
blocks_in_map = state->limit - 1;
|
|
|
|
strlcat(state->pp_buf, " [mac]", PAGE_SIZE);
|
|
for (slot = 1; slot <= blocks_in_map; ++slot) {
|
|
int pos = slot * secsize;
|
|
put_dev_sector(sect);
|
|
data = read_part_sector(state, pos/512, §);
|
|
if (!data)
|
|
return -1;
|
|
part = (struct mac_partition *) (data + pos%512);
|
|
if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC)
|
|
break;
|
|
put_partition(state, slot,
|
|
be32_to_cpu(part->start_block) * (secsize/512),
|
|
be32_to_cpu(part->block_count) * (secsize/512));
|
|
|
|
if (!strncasecmp(part->type, "Linux_RAID", 10))
|
|
state->parts[slot].flags = ADDPART_FLAG_RAID;
|
|
#ifdef CONFIG_PPC_PMAC
|
|
/*
|
|
* If this is the first bootable partition, tell the
|
|
* setup code, in case it wants to make this the root.
|
|
*/
|
|
if (machine_is(powermac)) {
|
|
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
|
|
|| (strncasecmp(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 (strncasecmp(part->name + i, "root",
|
|
4) == 0) {
|
|
goodness += 2;
|
|
break;
|
|
}
|
|
}
|
|
if (strncasecmp(part->name, "swap", 4) == 0)
|
|
goodness--;
|
|
}
|
|
|
|
if (goodness > found_root_goodness) {
|
|
found_root = slot;
|
|
found_root_goodness = goodness;
|
|
}
|
|
}
|
|
#endif /* CONFIG_PPC_PMAC */
|
|
}
|
|
#ifdef CONFIG_PPC_PMAC
|
|
if (found_root_goodness)
|
|
note_bootable_part(state->disk->part0->bd_dev, found_root,
|
|
found_root_goodness);
|
|
#endif
|
|
|
|
put_dev_sector(sect);
|
|
strlcat(state->pp_buf, "\n", PAGE_SIZE);
|
|
return 1;
|
|
}
|