| bigbiff bigbiff | e60683a | 2013-02-22 20:55:50 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 Karel Zak <kzak@redhat.com> |
| 3 | * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org> |
| 4 | * |
| 5 | * Inspired by libvolume_id by |
| 6 | * Kay Sievers <kay.sievers@vrfy.org> |
| 7 | * |
| 8 | * This file may be redistributed under the terms of the |
| 9 | * GNU Lesser General Public License. |
| 10 | */ |
| 11 | #include <stdio.h> |
| 12 | #include <stdlib.h> |
| 13 | #include <unistd.h> |
| 14 | #include <string.h> |
| 15 | #include <errno.h> |
| 16 | #include <ctype.h> |
| 17 | #include <stdint.h> |
| 18 | #include <stddef.h> |
| 19 | |
| 20 | #include "superblocks.h" |
| 21 | |
| 22 | struct silicon_metadata { |
| 23 | uint8_t unknown0[0x2E]; |
| 24 | uint8_t ascii_version[0x36 - 0x2E]; |
| 25 | int8_t diskname[0x56 - 0x36]; |
| 26 | int8_t unknown1[0x60 - 0x56]; |
| 27 | uint32_t magic; |
| 28 | int8_t unknown1a[0x6C - 0x64]; |
| 29 | uint32_t array_sectors_low; |
| 30 | uint32_t array_sectors_high; |
| 31 | int8_t unknown2[0x78 - 0x74]; |
| 32 | uint32_t thisdisk_sectors; |
| 33 | int8_t unknown3[0x100 - 0x7C]; |
| 34 | int8_t unknown4[0x104 - 0x100]; |
| 35 | uint16_t product_id; |
| 36 | uint16_t vendor_id; |
| 37 | uint16_t minor_ver; |
| 38 | uint16_t major_ver; |
| 39 | uint8_t seconds; |
| 40 | uint8_t minutes; |
| 41 | uint8_t hour; |
| 42 | uint8_t day; |
| 43 | uint8_t month; |
| 44 | uint8_t year; |
| 45 | uint16_t raid0_stride; |
| 46 | int8_t unknown6[0x116 - 0x114]; |
| 47 | uint8_t disk_number; |
| 48 | uint8_t type; /* SILICON_TYPE_* */ |
| 49 | int8_t drives_per_striped_set; |
| 50 | int8_t striped_set_number; |
| 51 | int8_t drives_per_mirrored_set; |
| 52 | int8_t mirrored_set_number; |
| 53 | uint32_t rebuild_ptr_low; |
| 54 | uint32_t rebuild_ptr_high; |
| 55 | uint32_t incarnation_no; |
| 56 | uint8_t member_status; |
| 57 | uint8_t mirrored_set_state; /* SILICON_MIRROR_* */ |
| 58 | uint8_t reported_device_location; |
| 59 | uint8_t idechannel; |
| 60 | uint8_t auto_rebuild; |
| 61 | uint8_t unknown8; |
| 62 | uint8_t text_type[0x13E - 0x12E]; |
| 63 | uint16_t checksum1; |
| 64 | int8_t assumed_zeros[0x1FE - 0x140]; |
| 65 | uint16_t checksum2; |
| 66 | } __attribute__((packed)); |
| 67 | |
| 68 | #define SILICON_MAGIC 0x2F000000 |
| 69 | |
| 70 | static int checksum(struct silicon_metadata *sil) |
| 71 | { |
| 72 | int sum = 0; |
| 73 | unsigned short count = offsetof(struct silicon_metadata, checksum1) / 2; |
| 74 | uint16_t *p = (uint16_t *) sil; |
| 75 | |
| 76 | while (count--) |
| 77 | sum += *p++; |
| 78 | |
| 79 | return (-sum & 0xFFFF) == le16_to_cpu(sil->checksum1); |
| 80 | } |
| 81 | |
| 82 | static int probe_silraid(blkid_probe pr, |
| 83 | const struct blkid_idmag *mag __attribute__((__unused__))) |
| 84 | { |
| 85 | uint64_t off; |
| 86 | struct silicon_metadata *sil; |
| 87 | |
| 88 | if (pr->size < 0x10000) |
| 89 | return -1; |
| 90 | if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr)) |
| 91 | return -1; |
| 92 | |
| 93 | off = ((pr->size / 0x200) - 1) * 0x200; |
| 94 | |
| 95 | sil = (struct silicon_metadata *) |
| 96 | blkid_probe_get_buffer(pr, off, |
| 97 | sizeof(struct silicon_metadata)); |
| 98 | if (!sil) |
| 99 | return -1; |
| 100 | |
| 101 | if (le32_to_cpu(sil->magic) != SILICON_MAGIC) |
| 102 | return -1; |
| 103 | if (sil->disk_number >= 8) |
| 104 | return -1; |
| 105 | if (!checksum(sil)) { |
| 106 | DBG(DEBUG_LOWPROBE, printf("silicon raid: incorrect checksum\n")); |
| 107 | return -1; |
| 108 | } |
| 109 | |
| 110 | if (blkid_probe_sprintf_version(pr, "%u.%u", |
| 111 | le16_to_cpu(sil->major_ver), |
| 112 | le16_to_cpu(sil->minor_ver)) != 0) |
| 113 | return -1; |
| 114 | |
| 115 | if (blkid_probe_set_magic(pr, |
| 116 | off + offsetof(struct silicon_metadata, magic), |
| 117 | sizeof(sil->magic), |
| 118 | (unsigned char *) &sil->magic)) |
| 119 | return -1; |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | const struct blkid_idinfo silraid_idinfo = { |
| 124 | .name = "silicon_medley_raid_member", |
| 125 | .usage = BLKID_USAGE_RAID, |
| 126 | .probefunc = probe_silraid, |
| 127 | .magics = BLKID_NONE_MAGIC |
| 128 | }; |
| 129 | |
| 130 | |