patch-2.3.99-pre6 linux/fs/partitions/ibm.c

• Lines: 123
• Date: Wed Apr 12 09:47:30 2000
• Orig file: v2.3.99-pre5/linux/fs/partitions/ibm.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.99-pre5/linux/fs/partitions/ibm.c linux/fs/partitions/ibm.c
@@ -0,0 +1,122 @@
+/*
+ * 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);
+}
+