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/*
* File...........: linux/fs/partitions/ibm.c
* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000
*/
#include <linux/fs.h>
#include <linux/genhd.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/blk.h>
#include <asm/ebcdic.h>
#include "../../drivers/s390/block/dasd_types.h"
typedef enum {
ibm_partition_none = 0,
ibm_partition_lnx1 = 1,
ibm_partition_vol1 = 3,
ibm_partition_cms1 = 4
} ibm_partition_t;
static ibm_partition_t
get_partition_type ( char * type )
{
static char lnx[5]="LNX1";
static char vol[5]="VOL1";
static char cms[5]="CMS1";
if ( ! strncmp ( lnx, "LNX1",4 ) ) {
ASCEBC(lnx,4);
ASCEBC(vol,4);
ASCEBC(cms,4);
}
if ( ! strncmp (type,lnx,4) ||
! strncmp (type,"LNX1",4) )
return ibm_partition_lnx1;
if ( ! strncmp (type,vol,4) )
return ibm_partition_vol1;
if ( ! strncmp (type,cms,4) )
return ibm_partition_cms1;
return ibm_partition_none;
}
void
ibm_partition (struct gendisk *hd, kdev_t dev)
{
struct buffer_head *bh;
ibm_partition_t partition_type;
int di = MINOR(dev) >> PARTN_BITS;
char type[5] = {0,};
char name[7] = {0,};
if ( bh = bread( dev,
dasd_info[di]->sizes.label_block,
get_ptable_blocksize(dev) ) ) {
strncpy ( type,bh -> b_data, 4);
strncpy ( name,bh -> b_data + 4, 6);
} else {
return;
}
if ( (*(char *)bh -> b_data) & 0x80 ) {
EBCASC(name,6);
}
switch ( partition_type = get_partition_type(type) ) {
case ibm_partition_lnx1:
printk ( "(LNX1)/%6s:",name);
add_gd_partition( hd, MINOR(dev) + 1,
(dasd_info [di]->sizes.label_block + 1) <<
dasd_info [di]->sizes.s2b_shift,
(dasd_info [di]->sizes.blocks -
dasd_info [di]->sizes.label_block - 1) <<
dasd_info [di]->sizes.s2b_shift );
break;
case ibm_partition_vol1:
printk ( "(VOL1)/%6s:",name);
break;
case ibm_partition_cms1:
printk ( "(CMS1)/%6s:",name);
if (* (((long *)bh->b_data) + 13) == 0) {
/* disk holds a CMS filesystem */
add_gd_partition( hd, MINOR(dev) + 1,
(dasd_info [di]->sizes.label_block + 1) <<
dasd_info [di]->sizes.s2b_shift,
(dasd_info [di]->sizes.blocks -
dasd_info [di]->sizes.label_block) <<
dasd_info [di]->sizes.s2b_shift );
printk ("(CMS)");
} else {
/* disk is reserved minidisk */
int offset = (*(((long *)bh->b_data) + 13));
int size = (*(((long *)bh->b_data) + 7)) - 1 -
(*(((long *)bh->b_data) + 13)) *
((*(((long *)bh->b_data) + 3)) >> 9);
add_gd_partition( hd, MINOR(dev) + 1,
offset << dasd_info [di]->sizes.s2b_shift,
size << dasd_info [di]->sizes.s2b_shift );
printk ("(MDSK)");
}
break;
case ibm_partition_none:
printk ( "(nonl)/ :");
/*
printk ( "%d %d %d ", MINOR(dev) + 1,
(dasd_info [di]->sizes.label_block + 1) <<
dasd_info [di]->sizes.s2b_shift,
(dasd_info [di]->sizes.blocks -
dasd_info [di]->sizes.label_block - 1) <<
dasd_info [di]->sizes.s2b_shift );
*/
add_gd_partition( hd, MINOR(dev) + 1,
(dasd_info [di]->sizes.label_block + 1) <<
dasd_info [di]->sizes.s2b_shift,
(dasd_info [di]->sizes.blocks -
dasd_info [di]->sizes.label_block - 1) <<
dasd_info [di]->sizes.s2b_shift );
break;
}
printk ( "\n" );
bforget(bh);
}
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