Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/fs/partitions/sgi.c b/fs/partitions/sgi.c
new file mode 100644
index 0000000..6fa4ff8
--- /dev/null
+++ b/fs/partitions/sgi.c
@@ -0,0 +1,82 @@
+/*
+ * fs/partitions/sgi.c
+ *
+ * Code extracted from drivers/block/genhd.c
+ */
+
+#include "check.h"
+#include "sgi.h"
+
+struct sgi_disklabel {
+ __be32 magic_mushroom; /* Big fat spliff... */
+ __be16 root_part_num; /* Root partition number */
+ __be16 swap_part_num; /* Swap partition number */
+ s8 boot_file[16]; /* Name of boot file for ARCS */
+ u8 _unused0[48]; /* Device parameter useless crapola.. */
+ struct sgi_volume {
+ s8 name[8]; /* Name of volume */
+ __be32 block_num; /* Logical block number */
+ __be32 num_bytes; /* How big, in bytes */
+ } volume[15];
+ struct sgi_partition {
+ __be32 num_blocks; /* Size in logical blocks */
+ __be32 first_block; /* First logical block */
+ __be32 type; /* Type of this partition */
+ } partitions[16];
+ __be32 csum; /* Disk label checksum */
+ __be32 _unused1; /* Padding */
+};
+
+int sgi_partition(struct parsed_partitions *state, struct block_device *bdev)
+{
+ int i, csum;
+ __be32 magic;
+ int slot = 1;
+ unsigned int start, blocks;
+ __be32 *ui, cs;
+ Sector sect;
+ struct sgi_disklabel *label;
+ struct sgi_partition *p;
+ char b[BDEVNAME_SIZE];
+
+ label = (struct sgi_disklabel *) read_dev_sector(bdev, 0, §);
+ if (!label)
+ return -1;
+ p = &label->partitions[0];
+ magic = label->magic_mushroom;
+ if(be32_to_cpu(magic) != SGI_LABEL_MAGIC) {
+ /*printk("Dev %s SGI disklabel: bad magic %08x\n",
+ bdevname(bdev, b), be32_to_cpu(magic));*/
+ put_dev_sector(sect);
+ return 0;
+ }
+ ui = ((__be32 *) (label + 1)) - 1;
+ for(csum = 0; ui >= ((__be32 *) label);) {
+ cs = *ui--;
+ csum += be32_to_cpu(cs);
+ }
+ if(csum) {
+ printk(KERN_WARNING "Dev %s SGI disklabel: csum bad, label corrupted\n",
+ bdevname(bdev, b));
+ put_dev_sector(sect);
+ return 0;
+ }
+ /* All SGI disk labels have 16 partitions, disks under Linux only
+ * have 15 minor's. Luckily there are always a few zero length
+ * partitions which we don't care about so we never overflow the
+ * current_minor.
+ */
+ for(i = 0; i < 16; i++, p++) {
+ blocks = be32_to_cpu(p->num_blocks);
+ start = be32_to_cpu(p->first_block);
+ if (blocks) {
+ put_partition(state, slot, start, blocks);
+ if (be32_to_cpu(p->type) == LINUX_RAID_PARTITION)
+ state->parts[slot].flags = 1;
+ }
+ slot++;
+ }
+ printk("\n");
+ put_dev_sector(sect);
+ return 1;
+}