[net-next-2.6.git] / fs / partitions / osf.c

/*
 *  fs/partitions/osf.c
 *
 *  Code extracted from drivers/block/genhd.c
 *
 *  Copyright (C) 1991-1998  Linus Torvalds
 *  Re-organised Feb 1998 Russell King
 */

#include "check.h"
#include "osf.h"

int osf_partition(struct parsed_partitions *state)
{
	int i;
	int slot = 1;
	Sector sect;
	unsigned char *data;
	struct disklabel {
		__le32 d_magic;
		__le16 d_type,d_subtype;
		u8 d_typename[16];
		u8 d_packname[16];
		__le32 d_secsize;
		__le32 d_nsectors;
		__le32 d_ntracks;
		__le32 d_ncylinders;
		__le32 d_secpercyl;
		__le32 d_secprtunit;
		__le16 d_sparespertrack;
		__le16 d_sparespercyl;
		__le32 d_acylinders;
		__le16 d_rpm, d_interleave, d_trackskew, d_cylskew;
		__le32 d_headswitch, d_trkseek, d_flags;
		__le32 d_drivedata[5];
		__le32 d_spare[5];
		__le32 d_magic2;
		__le16 d_checksum;
		__le16 d_npartitions;
		__le32 d_bbsize, d_sbsize;
		struct d_partition {
			__le32 p_size;
			__le32 p_offset;
			__le32 p_fsize;
			u8  p_fstype;
			u8  p_frag;
			__le16 p_cpg;
		} d_partitions[8];
	} * label;
	struct d_partition * partition;

	data = read_part_sector(state, 0, &sect);
	if (!data)
		return -1;

	label = (struct disklabel *) (data+64);
	partition = label->d_partitions;
	if (le32_to_cpu(label->d_magic) != DISKLABELMAGIC) {
		put_dev_sector(sect);
		return 0;
	}
	if (le32_to_cpu(label->d_magic2) != DISKLABELMAGIC) {
		put_dev_sector(sect);
		return 0;
	}
	for (i = 0 ; i < le16_to_cpu(label->d_npartitions); i++, partition++) {
		if (slot == state->limit)
		        break;
		if (le32_to_cpu(partition->p_size))
			put_partition(state, slot,
				le32_to_cpu(partition->p_offset),
				le32_to_cpu(partition->p_size));
		slot++;
	}
	strlcat(state->pp_buf, "\n", PAGE_SIZE);
	put_dev_sector(sect);
	return 1;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* fs/partitions/osf.c
	3	*
	4	* Code extracted from drivers/block/genhd.c
	5	*
	6	* Copyright (C) 1991-1998 Linus Torvalds
	7	* Re-organised Feb 1998 Russell King
	8	*/
	9
	10	#include "check.h"
	11	#include "osf.h"
	12
1493bf21	13	int osf_partition(struct parsed_partitions *state)
1da177e4 LT	14	{
	15	int i;
	16	int slot = 1;
	17	Sector sect;
	18	unsigned char *data;
	19	struct disklabel {
	20	__le32 d_magic;
	21	__le16 d_type,d_subtype;
	22	u8 d_typename[16];
	23	u8 d_packname[16];
	24	__le32 d_secsize;
	25	__le32 d_nsectors;
	26	__le32 d_ntracks;
	27	__le32 d_ncylinders;
	28	__le32 d_secpercyl;
	29	__le32 d_secprtunit;
	30	__le16 d_sparespertrack;
	31	__le16 d_sparespercyl;
	32	__le32 d_acylinders;
	33	__le16 d_rpm, d_interleave, d_trackskew, d_cylskew;
	34	__le32 d_headswitch, d_trkseek, d_flags;
	35	__le32 d_drivedata[5];
	36	__le32 d_spare[5];
	37	__le32 d_magic2;
	38	__le16 d_checksum;
	39	__le16 d_npartitions;
	40	__le32 d_bbsize, d_sbsize;
	41	struct d_partition {
	42	__le32 p_size;
	43	__le32 p_offset;
	44	__le32 p_fsize;
	45	u8 p_fstype;
	46	u8 p_frag;
	47	__le16 p_cpg;
	48	} d_partitions[8];
	49	} * label;
	50	struct d_partition * partition;
	51
1493bf21	52	data = read_part_sector(state, 0, &sect);
1da177e4 LT	53	if (!data)
	54	return -1;
	55
	56	label = (struct disklabel *) (data+64);
	57	partition = label->d_partitions;
	58	if (le32_to_cpu(label->d_magic) != DISKLABELMAGIC) {
	59	put_dev_sector(sect);
	60	return 0;
	61	}
	62	if (le32_to_cpu(label->d_magic2) != DISKLABELMAGIC) {
	63	put_dev_sector(sect);
	64	return 0;
	65	}
	66	for (i = 0 ; i < le16_to_cpu(label->d_npartitions); i++, partition++) {
	67	if (slot == state->limit)
	68	break;
	69	if (le32_to_cpu(partition->p_size))
	70	put_partition(state, slot,
	71	le32_to_cpu(partition->p_offset),
	72	le32_to_cpu(partition->p_size));
	73	slot++;
	74	}
9c867fbe	75	strlcat(state->pp_buf, "\n", PAGE_SIZE);
1da177e4 LT	76	put_dev_sector(sect);
	77	return 1;
	78	}