summaryrefslogtreecommitdiffstats
path: root/fs/partitions/ultrix.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/partitions/ultrix.c')
-rw-r--r--fs/partitions/ultrix.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/fs/partitions/ultrix.c b/fs/partitions/ultrix.c
new file mode 100644
index 000000000000..8a8d4d9db314
--- /dev/null
+++ b/fs/partitions/ultrix.c
@@ -0,0 +1,47 @@
+/*
+ * fs/partitions/ultrix.c
+ *
+ * Code extracted from drivers/block/genhd.c
+ *
+ * Re-organised Jul 1999 Russell King
+ */
+
+#include "check.h"
+
+int ultrix_partition(struct parsed_partitions *state, struct block_device *bdev)
+{
+ int i;
+ Sector sect;
+ unsigned char *data;
+ 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 */
+
+ data = read_dev_sector(bdev, (16384 - sizeof(*label))/512, &sect);
+ if (!data)
+ return -1;
+
+ label = (struct ultrix_disklabel *)(data + 512 - sizeof(*label));
+
+ if (label->pt_magic == PT_MAGIC && label->pt_valid == PT_VALID) {
+ for (i=0; i<8; i++)
+ if (label->pt_part[i].pi_nblocks)
+ put_partition(state, i+1,
+ label->pt_part[i].pi_blkoff,
+ label->pt_part[i].pi_nblocks);
+ put_dev_sector(sect);
+ printk ("\n");
+ return 1;
+ } else {
+ put_dev_sector(sect);
+ return 0;
+ }
+}