[3320] | 1 | /*
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| 2 | * volume_id - reads filesystem label and uuid
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| 3 | *
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| 4 | * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
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| 5 | *
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| 6 | * This library is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the GNU Lesser General Public
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| 8 | * License as published by the Free Software Foundation; either
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| 9 | * version 2.1 of the License, or (at your option) any later version.
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| 10 | *
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| 11 | * This library is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 14 | * Lesser General Public License for more details.
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| 15 | *
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| 16 | * You should have received a copy of the GNU Lesser General Public
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| 17 | * License along with this library; if not, write to the Free Software
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| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 19 | */
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| 20 |
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| 21 | #include "volume_id_internal.h"
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| 22 |
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| 23 | struct lvm1_super_block {
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| 24 | uint8_t id[2];
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| 25 | } PACKED;
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| 26 |
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| 27 | struct lvm2_super_block {
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| 28 | uint8_t id[8];
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| 29 | uint64_t sector_xl;
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| 30 | uint32_t crc_xl;
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| 31 | uint32_t offset_xl;
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| 32 | uint8_t type[8];
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| 33 | } PACKED;
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| 34 |
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| 35 | #define LVM1_SB_OFF 0x400
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| 36 |
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| 37 | int FAST_FUNC volume_id_probe_lvm1(struct volume_id *id, uint64_t off)
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| 38 | {
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| 39 | struct lvm1_super_block *lvm;
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| 40 |
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| 41 | dbg("probing at offset 0x%llx", (unsigned long long) off);
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| 42 |
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| 43 | lvm = volume_id_get_buffer(id, off + LVM1_SB_OFF, 0x800);
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| 44 | if (lvm == NULL)
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| 45 | return -1;
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| 46 |
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| 47 | if (lvm->id[0] != 'H' || lvm->id[1] != 'M')
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| 48 | return -1;
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| 49 |
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| 50 | // volume_id_set_usage(id, VOLUME_ID_RAID);
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| 51 | // id->type = "LVM1_member";
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| 52 |
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| 53 | return 0;
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| 54 | }
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| 55 |
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| 56 | #define LVM2_LABEL_ID "LABELONE"
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| 57 | #define LVM2LABEL_SCAN_SECTORS 4
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| 58 |
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| 59 | int FAST_FUNC volume_id_probe_lvm2(struct volume_id *id, uint64_t off)
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| 60 | {
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| 61 | const uint8_t *buf;
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| 62 | unsigned soff;
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| 63 | struct lvm2_super_block *lvm;
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| 64 |
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| 65 | dbg("probing at offset 0x%llx", (unsigned long long) off);
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| 66 |
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| 67 | buf = volume_id_get_buffer(id, off, LVM2LABEL_SCAN_SECTORS * 0x200);
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| 68 | if (buf == NULL)
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| 69 | return -1;
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| 70 |
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| 71 |
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| 72 | for (soff = 0; soff < LVM2LABEL_SCAN_SECTORS * 0x200; soff += 0x200) {
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| 73 | lvm = (struct lvm2_super_block *) &buf[soff];
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| 74 |
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| 75 | if (memcmp(lvm->id, LVM2_LABEL_ID, 8) == 0)
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| 76 | goto found;
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| 77 | }
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| 78 |
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| 79 | return -1;
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| 80 |
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| 81 | found:
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| 82 | // memcpy(id->type_version, lvm->type, 8);
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| 83 | // volume_id_set_usage(id, VOLUME_ID_RAID);
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| 84 | // id->type = "LVM2_member";
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| 85 |
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| 86 | return 0;
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| 87 | }
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