Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * fs/partitions/ultrix.c | |
4 | * | |
5 | * Code extracted from drivers/block/genhd.c | |
6 | * | |
7 | * Re-organised Jul 1999 Russell King | |
8 | */ | |
9 | ||
10 | #include "check.h" | |
a70cf17c | 11 | #include "ultrix.h" |
1da177e4 | 12 | |
1493bf21 | 13 | int ultrix_partition(struct parsed_partitions *state) |
1da177e4 LT |
14 | { |
15 | int i; | |
16 | Sector sect; | |
17 | unsigned char *data; | |
18 | struct ultrix_disklabel { | |
19 | s32 pt_magic; /* magic no. indicating part. info exits */ | |
20 | s32 pt_valid; /* set by driver if pt is current */ | |
21 | struct pt_info { | |
22 | s32 pi_nblocks; /* no. of sectors */ | |
23 | u32 pi_blkoff; /* block offset for start */ | |
24 | } pt_part[8]; | |
25 | } *label; | |
26 | ||
27 | #define PT_MAGIC 0x032957 /* Partition magic number */ | |
28 | #define PT_VALID 1 /* Indicates if struct is valid */ | |
29 | ||
1493bf21 | 30 | data = read_part_sector(state, (16384 - sizeof(*label))/512, §); |
1da177e4 LT |
31 | if (!data) |
32 | return -1; | |
33 | ||
34 | label = (struct ultrix_disklabel *)(data + 512 - sizeof(*label)); | |
35 | ||
36 | if (label->pt_magic == PT_MAGIC && label->pt_valid == PT_VALID) { | |
37 | for (i=0; i<8; i++) | |
38 | if (label->pt_part[i].pi_nblocks) | |
39 | put_partition(state, i+1, | |
40 | label->pt_part[i].pi_blkoff, | |
41 | label->pt_part[i].pi_nblocks); | |
42 | put_dev_sector(sect); | |
9c867fbe | 43 | strlcat(state->pp_buf, "\n", PAGE_SIZE); |
1da177e4 LT |
44 | return 1; |
45 | } else { | |
46 | put_dev_sector(sect); | |
47 | return 0; | |
48 | } | |
49 | } |