| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 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" |
| 11 | |
| 12 | int ultrix_partition(struct parsed_partitions *state) |
| 13 | { |
| 14 | int i; |
| 15 | Sector sect; |
| 16 | unsigned char *data; |
| 17 | struct ultrix_disklabel { |
| 18 | s32 pt_magic; /* magic no. indicating part. info exits */ |
| 19 | s32 pt_valid; /* set by driver if pt is current */ |
| 20 | struct pt_info { |
| 21 | s32 pi_nblocks; /* no. of sectors */ |
| 22 | u32 pi_blkoff; /* block offset for start */ |
| 23 | } pt_part[8]; |
| 24 | } *label; |
| 25 | |
| 26 | #define PT_MAGIC 0x032957 /* Partition magic number */ |
| 27 | #define PT_VALID 1 /* Indicates if struct is valid */ |
| 28 | |
| 29 | data = read_part_sector(state, n: (16384 - sizeof(*label))/512, p: §); |
| 30 | if (!data) |
| 31 | return -1; |
| 32 | |
| 33 | label = (struct ultrix_disklabel *)(data + 512 - sizeof(*label)); |
| 34 | |
| 35 | if (label->pt_magic == PT_MAGIC && label->pt_valid == PT_VALID) { |
| 36 | for (i=0; i<8; i++) |
| 37 | if (label->pt_part[i].pi_nblocks) |
| 38 | put_partition(p: state, n: i+1, |
| 39 | from: label->pt_part[i].pi_blkoff, |
| 40 | size: label->pt_part[i].pi_nblocks); |
| 41 | put_dev_sector(p: sect); |
| 42 | strlcat(p: state->pp_buf, q: "\n", PAGE_SIZE); |
| 43 | return 1; |
| 44 | } else { |
| 45 | put_dev_sector(p: sect); |
| 46 | return 0; |
| 47 | } |
| 48 | } |
| 49 |