← Back to branch summary

~ubuntu-branches/ubuntu/trusty/util-linux/trusty-proposed

« back to all changes in this revision

Viewing changes to libblkid/src/superblocks/ddf_raid.c

  • Committer: Package Import Robot
  • Author(s): LaMont Jones
  • Date: 2011-11-03 15:38:23 UTC
  • mto: (4.5.5 sid) (1.6.4)
  • mto: This revision was merged to the branch mainline in revision 85.
  • Revision ID: package-import@ubuntu.com-20111103153823-10sx16jprzxlhkqf
Import upstream version 2.20.1

Show diffs side-by-side

added added

removed removed

Lines of Context:
libblkid/src/superblocks/ddf_raid.c
 
1
/*
 
2
 * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
 
3
 *
 
4
 * Inspired by libvolume_id by
 
5
 *     Kay Sievers <kay.sievers@vrfy.org>
 
6
 *
 
7
 * This file may be redistributed under the terms of the
 
8
 * GNU Lesser General Public License.
 
9
 */
 
10
#include <stdio.h>
 
11
#include <stdlib.h>
 
12
#include <unistd.h>
 
13
#include <string.h>
 
14
#include <stdint.h>
 
15
 
 
16
#include "superblocks.h"
 
17
 
 
18
/* http://www.snia.org/standards/home */
 
19
#define DDF_GUID_LENGTH                 24
 
20
#define DDF_REV_LENGTH                  8
 
21
#define DDF_MAGIC                       0xDE11DE11
 
22
 
 
23
 
 
24
struct ddf_header {
 
25
        uint32_t        signature;
 
26
        uint32_t        crc;
 
27
        uint8_t         guid[DDF_GUID_LENGTH];
 
28
        char            ddf_rev[8];     /* 01.02.00 */
 
29
        uint32_t        seq;            /* starts at '1' */
 
30
        uint32_t        timestamp;
 
31
        uint8_t         openflag;
 
32
        uint8_t         foreignflag;
 
33
        uint8_t         enforcegroups;
 
34
        uint8_t         pad0;           /* 0xff */
 
35
        uint8_t         pad1[12];       /* 12 * 0xff */
 
36
        /* 64 bytes so far */
 
37
        uint8_t         header_ext[32]; /* reserved: fill with 0xff */
 
38
        uint64_t        primary_lba;
 
39
        uint64_t        secondary_lba;
 
40
        uint8_t         type;
 
41
        uint8_t         pad2[3];        /* 0xff */
 
42
        uint32_t        workspace_len;  /* sectors for vendor space -
 
43
                                         * at least 32768(sectors) */
 
44
        uint64_t        workspace_lba;
 
45
        uint16_t        max_pd_entries; /* one of 15, 63, 255, 1023, 4095 */
 
46
        uint16_t        max_vd_entries; /* 2^(4,6,8,10,12)-1 : i.e. as above */
 
47
        uint16_t        max_partitions; /* i.e. max num of configuration
 
48
                                           record entries per disk */
 
49
        uint16_t        config_record_len; /* 1 +ROUNDUP(max_primary_element_entries
 
50
                                           *12/512) */
 
51
        uint16_t        max_primary_element_entries; /* 16, 64, 256, 1024, or 4096 */
 
52
        uint8_t         pad3[54];       /* 0xff */
 
53
        /* 192 bytes so far */
 
54
        uint32_t        controller_section_offset;
 
55
        uint32_t        controller_section_length;
 
56
        uint32_t        phys_section_offset;
 
57
        uint32_t        phys_section_length;
 
58
        uint32_t        virt_section_offset;
 
59
        uint32_t        virt_section_length;
 
60
        uint32_t        config_section_offset;
 
61
        uint32_t        config_section_length;
 
62
        uint32_t        data_section_offset;
 
63
        uint32_t        data_section_length;
 
64
        uint32_t        bbm_section_offset;
 
65
        uint32_t        bbm_section_length;
 
66
        uint32_t        diag_space_offset;
 
67
        uint32_t        diag_space_length;
 
68
        uint32_t        vendor_offset;
 
69
        uint32_t        vendor_length;
 
70
        /* 256 bytes so far */
 
71
        uint8_t         pad4[256];      /* 0xff */
 
72
} __attribute__((packed));
 
73
 
 
74
static int probe_ddf(blkid_probe pr,
 
75
                const struct blkid_idmag *mag __attribute__((__unused__)))
 
76
{
 
77
        int hdrs[] = { 1, 257 };
 
78
        size_t i;
 
79
        struct ddf_header *ddf = NULL;
 
80
        char version[DDF_REV_LENGTH + 1];
 
81
        uint64_t off, lba;
 
82
 
 
83
        if (pr->size < 0x30000)
 
84
                return -1;
 
85
 
 
86
        for (i = 0; i < ARRAY_SIZE(hdrs); i++) {
 
87
                off = ((pr->size / 0x200) - hdrs[i]) * 0x200;
 
88
 
 
89
                ddf = (struct ddf_header *) blkid_probe_get_buffer(pr,
 
90
                                        off,
 
91
                                        sizeof(struct ddf_header));
 
92
                if (!ddf)
 
93
                        return -1;
 
94
 
 
95
                if (ddf->signature == cpu_to_be32(DDF_MAGIC) ||
 
96
                    ddf->signature == cpu_to_le32(DDF_MAGIC))
 
97
                        break;
 
98
                ddf = NULL;
 
99
        }
 
100
 
 
101
        if (!ddf)
 
102
                return -1;
 
103
 
 
104
        lba = ddf->signature == cpu_to_be32(DDF_MAGIC) ?
 
105
                        be64_to_cpu(ddf->primary_lba) :
 
106
                        le64_to_cpu(ddf->primary_lba);
 
107
 
 
108
        if (lba > 0) {
 
109
                /* check primary header */
 
110
                unsigned char *buf;
 
111
 
 
112
                buf = blkid_probe_get_buffer(pr,
 
113
                                        lba << 9, sizeof(ddf->signature));
 
114
                if (!buf || memcmp(buf, &ddf->signature, 4))
 
115
                        return -1;
 
116
        }
 
117
 
 
118
        blkid_probe_strncpy_uuid(pr, ddf->guid, sizeof(ddf->guid));
 
119
 
 
120
        memcpy(version, ddf->ddf_rev, sizeof(ddf->ddf_rev));
 
121
        *(version + sizeof(ddf->ddf_rev)) = '\0';
 
122
 
 
123
        if (blkid_probe_set_version(pr, version) != 0)
 
124
                return -1;
 
125
        if (blkid_probe_set_magic(pr, off,
 
126
                        sizeof(ddf->signature),
 
127
                        (unsigned char *) &ddf->signature))
 
128
                return -1;
 
129
        return 0;
 
130
}
 
131
 
 
132
const struct blkid_idinfo ddfraid_idinfo = {
 
133
        .name           = "ddf_raid_member",
 
134
        .usage          = BLKID_USAGE_RAID,
 
135
        .probefunc      = probe_ddf,
 
136
        .magics         = BLKID_NONE_MAGIC
 
137
};
 
138
 
 
139