Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/partitions/ultrix.c | |
3 | * | |
4 | * Code extracted from drivers/block/genhd.c | |
5 | * | |
6 | * Re-organised Jul 1999 Russell King | |
7 | */ | |
8 | ||
9 | #include "check.h" | |
10 | ||
11 | int ultrix_partition(struct parsed_partitions *state, struct block_device *bdev) | |
12 | { | |
13 | int i; | |
14 | Sector sect; | |
15 | unsigned char *data; | |
16 | struct ultrix_disklabel { | |
17 | s32 pt_magic; /* magic no. indicating part. info exits */ | |
18 | s32 pt_valid; /* set by driver if pt is current */ | |
19 | struct pt_info { | |
20 | s32 pi_nblocks; /* no. of sectors */ | |
21 | u32 pi_blkoff; /* block offset for start */ | |
22 | } pt_part[8]; | |
23 | } *label; | |
24 | ||
25 | #define PT_MAGIC 0x032957 /* Partition magic number */ | |
26 | #define PT_VALID 1 /* Indicates if struct is valid */ | |
27 | ||
28 | data = read_dev_sector(bdev, (16384 - sizeof(*label))/512, §); | |
29 | if (!data) | |
30 | return -1; | |
31 | ||
32 | label = (struct ultrix_disklabel *)(data + 512 - sizeof(*label)); | |
33 | ||
34 | if (label->pt_magic == PT_MAGIC && label->pt_valid == PT_VALID) { | |
35 | for (i=0; i<8; i++) | |
36 | if (label->pt_part[i].pi_nblocks) | |
37 | put_partition(state, i+1, | |
38 | label->pt_part[i].pi_blkoff, | |
39 | label->pt_part[i].pi_nblocks); | |
40 | put_dev_sector(sect); | |
41 | printk ("\n"); | |
42 | return 1; | |
43 | } else { | |
44 | put_dev_sector(sect); | |
45 | return 0; | |
46 | } | |
47 | } |