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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/partitions/sun.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-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!
Diffstat (limited to 'fs/partitions/sun.c')
-rw-r--r-- | fs/partitions/sun.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/fs/partitions/sun.c b/fs/partitions/sun.c new file mode 100644 index 000000000000..abe91ca03edf --- /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, §); + 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; +} |