| bigbiff bigbiff | e60683a | 2013-02-22 20:55:50 -0500 | [diff] [blame] | 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 | |