patch-2.3.14 linux/fs/partitions/ultrix.c

• Lines: 61
• Date: Thu Aug 12 12:26:06 1999
• Orig file: v2.3.13/linux/fs/partitions/ultrix.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.13/linux/fs/partitions/ultrix.c linux/fs/partitions/ultrix.c
@@ -0,0 +1,60 @@
+/*
+ *  fs/partitions/ultrix.c
+ *
+ *  Code extracted from drivers/block/genhd.c
+ *
+ *  Re-organised Jul 1999 Russell King
+ */
+
+#include <linux/fs.h>
+#include <linux/genhd.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/blk.h>
+
+#include "check.h"
+
+static int ultrix_partition(struct gendisk *hd, kdev_t dev, unsigned long first_sector)
+{
+	int i, minor = current_minor;
+	struct buffer_head *bh;
+	struct ultrix_disklabel {
+		s32	pt_magic;	/* magic no. indicating part. info exits */
+		s32	pt_valid;	/* set by driver if pt is current */
+		struct  pt_info {
+			s32		pi_nblocks; /* no. of sectors */
+			u32		pi_blkoff;  /* block offset for start */
+		} pt_part[8];
+	} *label;
+
+#define PT_MAGIC	0x032957	/* Partition magic number */
+#define PT_VALID	1		/* Indicates if struct is valid */
+
+#define	SBLOCK	((unsigned long)((16384 - sizeof(struct ultrix_disklabel)) \
+                  /get_ptable_blocksize(dev)))
+
+	bh = bread (dev, SBLOCK, get_ptable_blocksize(dev));
+	if (!bh) {
+		printk (" unable to read block 0x%lx\n", SBLOCK);
+		return -1;
+	}
+	
+	label = (struct ultrix_disklabel *)(bh->b_data
+                                            + get_ptable_blocksize(dev)
+                                            - sizeof(struct ultrix_disklabel));
+
+	if (label->pt_magic == PT_MAGIC && label->pt_valid == PT_VALID) {
+		for (i=0; i<8; i++, minor++)
+			if (label->pt_part[i].pi_nblocks)
+				add_gd_partition(hd, minor, 
+					      label->pt_part[i].pi_blkoff,
+					      label->pt_part[i].pi_nblocks);
+		brelse(bh);
+		printk ("\n");
+		return 1;
+	} else {
+		brelse(bh);
+		return 0;
+	}
+}
+