mirror of https://gitee.com/openkylin/linux.git
87 lines
1.9 KiB
C
87 lines
1.9 KiB
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"
|
|
|
|
#define MAX_OSF_PARTITIONS 18
|
|
|
|
int osf_partition(struct parsed_partitions *state)
|
|
{
|
|
int i;
|
|
int slot = 1;
|
|
unsigned int npartitions;
|
|
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[MAX_OSF_PARTITIONS];
|
|
} * label;
|
|
struct d_partition * partition;
|
|
|
|
data = read_part_sector(state, 0, §);
|
|
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;
|
|
}
|
|
npartitions = le16_to_cpu(label->d_npartitions);
|
|
if (npartitions > MAX_OSF_PARTITIONS) {
|
|
put_dev_sector(sect);
|
|
return 0;
|
|
}
|
|
for (i = 0 ; i < 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;
|
|
}
|