Commit 0e6e1db4 authored by Bob Copeland's avatar Bob Copeland Committed by Linus Torvalds
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[PATCH] partitions: Read Rio Karma partition table 



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: default avatarBob Copeland <me@bobcopeland.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent cad82448

fs/partitions/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -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

fs/partitions/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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

fs/partitions/check.c

+4 −0
Original line number Diff line number Diff line
@@ -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

};

fs/partitions/karma.c

0 → 100644
+57 −0
Original line number Diff line number Diff line 
/*

 *  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;

}

fs/partitions/karma.h

0 → 100644
+8 −0
Original line number Diff line number Diff line 
/*

 *  fs/partitions/karma.h

 */



#define KARMA_LABEL_MAGIC		0xAB56



int karma_partition(struct parsed_partitions *state, struct block_device *bdev);

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