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[PATCH] partitions: Read Rio Karma partition table

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The Rio Karma portable MP3 player has its own proprietary partition table.

The partition layout is similar to a DOS boot sector but it begins at a
different offset and uses a different magic number (0xAB56 instead of
0xAA55).  Add support for it to enable mounting the device.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Bob Copeland 2006-01-16 22:14:20 -08:00 committed by Linus Torvalds
parent cad8244840
commit 0e6e1db4ac
5 changed files with 77 additions and 0 deletions
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7
fs/partitions/Kconfig
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@ -222,6 +222,13 @@ config SUN_PARTITION
given by the tar program ("man tar" or preferably "info tar"). If
you don't know what all this is about, say N.
config KARMA_PARTITION
bool "Karma Partition support"
depends on PARTITION_ADVANCED
help
Say Y here if you would like to mount the Rio Karma MP3 player, as it
uses a proprietary partition table.
config EFI_PARTITION
bool "EFI GUID Partition support"
depends on PARTITION_ADVANCED

1
fs/partitions/Makefile
View File

@ -17,3 +17,4 @@ obj-$(CONFIG_SUN_PARTITION) += sun.o
obj-$(CONFIG_ULTRIX_PARTITION) += ultrix.o
obj-$(CONFIG_IBM_PARTITION) += ibm.o
obj-$(CONFIG_EFI_PARTITION) += efi.o
obj-$(CONFIG_KARMA_PARTITION) += karma.o

4
fs/partitions/check.c
View File

@ -35,6 +35,7 @@
#include "ibm.h"
#include "ultrix.h"
#include "efi.h"
#include "karma.h"
#ifdef CONFIG_BLK_DEV_MD
extern void md_autodetect_dev(dev_t dev);
@ -102,6 +103,9 @@ static int (*check_part[])(struct parsed_partitions *, struct block_device *) =
#endif
#ifdef CONFIG_IBM_PARTITION
ibm_partition,
#endif
#ifdef CONFIG_KARMA_PARTITION
karma_partition,
#endif
NULL
};

57
fs/partitions/karma.c Normal file
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@ -0,0 +1,57 @@
/*
* fs/partitions/karma.c
* Rio Karma partition info.
*
* Copyright (C) 2006 Bob Copeland (me@bobcopeland.com)
* based on osf.c
*/
#include "check.h"
#include "karma.h"
int karma_partition(struct parsed_partitions *state, struct block_device *bdev)
{
int i;
int slot = 1;
Sector sect;
unsigned char *data;
struct disklabel {
u8 d_reserved[270];
struct d_partition {
__le32 p_res;
u8 p_fstype;
u8 p_res2[3];
__le32 p_offset;
__le32 p_size;
} d_partitions[2];
u8 d_blank[208];
__le16 d_magic;
} __attribute__((packed)) *label;
struct d_partition *p;
data = read_dev_sector(bdev, 0, &sect);
if (!data)
return -1;
label = (struct disklabel *)data;
if (le16_to_cpu(label->d_magic) != KARMA_LABEL_MAGIC) {
put_dev_sector(sect);
return 0;
}
p = label->d_partitions;
for (i = 0 ; i < 2; i++, p++) {
if (slot == state->limit)
break;
if (p->p_fstype == 0x4d && le32_to_cpu(p->p_size)) {
put_partition(state, slot, le32_to_cpu(p->p_offset),
le32_to_cpu(p->p_size));
}
slot++;
}
printk("\n");
put_dev_sector(sect);
return 1;
}

8
fs/partitions/karma.h Normal file
View File

@ -0,0 +1,8 @@
/*
* fs/partitions/karma.h
*/
#define KARMA_LABEL_MAGIC 0xAB56
int karma_partition(struct parsed_partitions *state, struct block_device *bdev);