| 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 | * Copyright (C) 2005 Tobias Klauser <tklauser@access.unizh.ch>
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| 6 | *
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| 7 | * This library is free software; you can redistribute it and/or
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| 8 | * modify it under the terms of the GNU Lesser General Public
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| 9 | * License as published by the Free Software Foundation; either
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| 10 | * version 2.1 of the License, or (at your option) any later version.
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| 11 | *
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| 12 | * This library is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 15 | * Lesser General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU Lesser General Public
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| 18 | * License along with this library; if not, write to the Free Software
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| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 20 | */
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| 21 |
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| 22 | //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_REISERFS) += reiserfs.o
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| 23 |
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| 24 | //config:
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| 25 | //config:config FEATURE_VOLUMEID_REISERFS
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| 26 | //config: bool "Reiser filesystem"
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| 27 | //config: default y
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| 28 | //config: depends on VOLUMEID
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| 29 | //config: help
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| 30 | //config: TODO
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| 31 | //config:
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| 32 |
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| 33 | #include "volume_id_internal.h"
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| 34 |
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| 35 | struct reiserfs_super_block {
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| 36 | uint32_t blocks_count;
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| 37 | uint32_t free_blocks;
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| 38 | uint32_t root_block;
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| 39 | uint32_t journal_block;
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| 40 | uint32_t journal_dev;
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| 41 | uint32_t orig_journal_size;
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| 42 | uint32_t dummy2[5];
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| 43 | uint16_t blocksize;
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| 44 | uint16_t dummy3[3];
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| 45 | uint8_t magic[12];
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| 46 | uint32_t dummy4[5];
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| 47 | uint8_t uuid[16];
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| 48 | uint8_t label[16];
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| 49 | } PACKED;
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| 50 |
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| 51 | struct reiser4_super_block {
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| 52 | uint8_t magic[16];
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| 53 | uint16_t dummy[2];
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| 54 | uint8_t uuid[16];
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| 55 | uint8_t label[16];
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| 56 | uint64_t dummy2;
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| 57 | } PACKED;
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| 58 |
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| 59 | #define REISERFS1_SUPERBLOCK_OFFSET 0x2000
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| 60 | #define REISERFS_SUPERBLOCK_OFFSET 0x10000
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| 61 |
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| 62 | int FAST_FUNC volume_id_probe_reiserfs(struct volume_id *id /*,uint64_t off*/)
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| 63 | {
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| 64 | #define off ((uint64_t)0)
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| 65 | struct reiserfs_super_block *rs;
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| 66 | struct reiser4_super_block *rs4;
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| 67 |
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| 68 | dbg("reiserfs: probing at offset 0x%llx", (unsigned long long) off);
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| 69 |
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| 70 | rs = volume_id_get_buffer(id, off + REISERFS_SUPERBLOCK_OFFSET, 0x200);
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| 71 | if (rs == NULL)
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| 72 | return -1;
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| 73 |
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| 74 | if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
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| 75 | dbg("reiserfs: ReIsErFs, no label");
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| 76 | // strcpy(id->type_version, "3.5");
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| 77 | goto found;
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| 78 | }
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| 79 | if (memcmp(rs->magic, "ReIsEr2Fs", 9) == 0) {
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| 80 | dbg("reiserfs: ReIsEr2Fs");
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| 81 | // strcpy(id->type_version, "3.6");
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| 82 | goto found_label;
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| 83 | }
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| 84 | if (memcmp(rs->magic, "ReIsEr3Fs", 9) == 0) {
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| 85 | dbg("reiserfs: ReIsEr3Fs");
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| 86 | // strcpy(id->type_version, "JR");
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| 87 | goto found_label;
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| 88 | }
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| 89 |
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| 90 | rs4 = (struct reiser4_super_block *) rs;
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| 91 | if (memcmp(rs4->magic, "ReIsEr4", 7) == 0) {
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| 92 | // strcpy(id->type_version, "4");
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| 93 | // volume_id_set_label_raw(id, rs4->label, 16);
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| 94 | volume_id_set_label_string(id, rs4->label, 16);
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| 95 | volume_id_set_uuid(id, rs4->uuid, UUID_DCE);
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| 96 | dbg("reiserfs: ReIsEr4, label '%s' uuid '%s'", id->label, id->uuid);
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| 97 | goto found;
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| 98 | }
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| 99 |
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| 100 | rs = volume_id_get_buffer(id, off + REISERFS1_SUPERBLOCK_OFFSET, 0x200);
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| 101 | if (rs == NULL)
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| 102 | return -1;
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| 103 |
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| 104 | if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
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| 105 | dbg("reiserfs: ReIsErFs, no label");
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| 106 | // strcpy(id->type_version, "3.5");
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| 107 | goto found;
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| 108 | }
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| 109 |
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| 110 | dbg("reiserfs: no signature found");
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| 111 | return -1;
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| 112 |
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| 113 | found_label:
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| 114 | // volume_id_set_label_raw(id, rs->label, 16);
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| 115 | volume_id_set_label_string(id, rs->label, 16);
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| 116 | volume_id_set_uuid(id, rs->uuid, UUID_DCE);
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| 117 | dbg("reiserfs: label '%s' uuid '%s'", id->label, id->uuid);
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| 118 |
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| 119 | found:
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| 120 | // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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| 121 | IF_FEATURE_BLKID_TYPE(id->type = "reiserfs";)
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| 122 |
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| 123 | return 0;
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| 124 | }
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