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-rw-r--r--fs/partitions/sun.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/fs/partitions/sun.c b/fs/partitions/sun.c
new file mode 100644
index 00000000000..abe91ca03ed
--- /dev/null
+++ b/fs/partitions/sun.c
@@ -0,0 +1,91 @@
+/*
+ * fs/partitions/sun.c
+ *
+ * Code extracted from drivers/block/genhd.c
+ *
+ * Copyright (C) 1991-1998 Linus Torvalds
+ * Re-organised Feb 1998 Russell King
+ */
+
+#include "check.h"
+#include "sun.h"
+
+int sun_partition(struct parsed_partitions *state, struct block_device *bdev)
+{
+ int i;
+ __be16 csum;
+ int slot = 1;
+ __be16 *ush;
+ Sector sect;
+ struct sun_disklabel {
+ unsigned char info[128]; /* Informative text string */
+ unsigned char spare0[14];
+ struct sun_info {
+ unsigned char spare1;
+ unsigned char id;
+ unsigned char spare2;
+ unsigned char flags;
+ } infos[8];
+ unsigned char spare[246]; /* Boot information etc. */
+ __be16 rspeed; /* Disk rotational speed */
+ __be16 pcylcount; /* Physical cylinder count */
+ __be16 sparecyl; /* extra sects per cylinder */
+ unsigned char spare2[4]; /* More magic... */
+ __be16 ilfact; /* Interleave factor */
+ __be16 ncyl; /* Data cylinder count */
+ __be16 nacyl; /* Alt. cylinder count */
+ __be16 ntrks; /* Tracks per cylinder */
+ __be16 nsect; /* Sectors per track */
+ unsigned char spare3[4]; /* Even more magic... */
+ struct sun_partition {
+ __be32 start_cylinder;
+ __be32 num_sectors;
+ } partitions[8];
+ __be16 magic; /* Magic number */
+ __be16 csum; /* Label xor'd checksum */
+ } * label;
+ struct sun_partition *p;
+ unsigned long spc;
+ char b[BDEVNAME_SIZE];
+
+ label = (struct sun_disklabel *)read_dev_sector(bdev, 0, &sect);
+ if (!label)
+ return -1;
+
+ p = label->partitions;
+ if (be16_to_cpu(label->magic) != SUN_LABEL_MAGIC) {
+/* printk(KERN_INFO "Dev %s Sun disklabel: bad magic %04x\n",
+ bdevname(bdev, b), be16_to_cpu(label->magic)); */
+ put_dev_sector(sect);
+ return 0;
+ }
+ /* Look at the checksum */
+ ush = ((__be16 *) (label+1)) - 1;
+ for (csum = 0; ush >= ((__be16 *) label);)
+ csum ^= *ush--;
+ if (csum) {
+ printk("Dev %s Sun disklabel: Csum bad, label corrupted\n",
+ bdevname(bdev, b));
+ put_dev_sector(sect);
+ return 0;
+ }
+
+ /* All Sun disks have 8 partition entries */
+ spc = be16_to_cpu(label->ntrks) * be16_to_cpu(label->nsect);
+ for (i = 0; i < 8; i++, p++) {
+ unsigned long st_sector;
+ int num_sectors;
+
+ st_sector = be32_to_cpu(p->start_cylinder) * spc;
+ num_sectors = be32_to_cpu(p->num_sectors);
+ if (num_sectors) {
+ put_partition(state, slot, st_sector, num_sectors);
+ if (label->infos[i].id == LINUX_RAID_PARTITION)
+ state->parts[slot].flags = 1;
+ }
+ slot++;
+ }
+ printk("\n");
+ put_dev_sector(sect);
+ return 1;
+}