block/partitions/karma.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  *  fs/partitions/karma.c
0004  *  Rio Karma partition info.
0005  *
0006  *  Copyright (C) 2006 Bob Copeland (me@bobcopeland.com)
0007  *  based on osf.c
0008  */
0009
0010 #include "check.h"
0011 #include <linux/compiler.h>
0012
0013 #define KARMA_LABEL_MAGIC       0xAB56
0014
0015 int karma_partition(struct parsed_partitions *state)
0016 {
0017     int i;
0018     int slot = 1;
0019     Sector sect;
0020     unsigned char *data;
0021     struct disklabel {
0022         u8 d_reserved[270];
0023         struct d_partition {
0024             __le32 p_res;
0025             u8 p_fstype;
0026             u8 p_res2[3];
0027             __le32 p_offset;
0028             __le32 p_size;
0029         } d_partitions[2];
0030         u8 d_blank[208];
0031         __le16 d_magic;
0032     } __packed *label;
0033     struct d_partition *p;
0034
0035     data = read_part_sector(state, 0, &sect);
0036     if (!data)
0037         return -1;
0038
0039     label = (struct disklabel *)data;
0040     if (le16_to_cpu(label->d_magic) != KARMA_LABEL_MAGIC) {
0041         put_dev_sector(sect);
0042         return 0;
0043     }
0044
0045     p = label->d_partitions;
0046     for (i = 0 ; i < 2; i++, p++) {
0047         if (slot == state->limit)
0048             break;
0049
0050         if (p->p_fstype == 0x4d && le32_to_cpu(p->p_size)) {
0051             put_partition(state, slot, le32_to_cpu(p->p_offset),
0052                 le32_to_cpu(p->p_size));
0053         }
0054         slot++;
0055     }
0056     strlcat(state->pp_buf, "\n", PAGE_SIZE);
0057     put_dev_sector(sect);
0058     return 1;
0059 }
0060