| bigbiff bigbiff | e60683a | 2013-02-22 20:55:50 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 1999, 2001 by Andries Brouwer |
| 3 | * Copyright (C) 1999, 2000, 2003 by Theodore Ts'o |
| 4 | * Copyright (C) 2008 Karel Zak <kzak@redhat.com> |
| 5 | * |
| 6 | * This file may be redistributed under the terms of the |
| 7 | * GNU Lesser General Public License. |
| 8 | */ |
| 9 | #include <stdio.h> |
| 10 | #include <stdlib.h> |
| 11 | #include <unistd.h> |
| 12 | #include <string.h> |
| 13 | #include <stdint.h> |
| 14 | |
| 15 | #include "superblocks.h" |
| 16 | |
| 17 | struct reiserfs_super_block { |
| 18 | uint32_t rs_blocks_count; |
| 19 | uint32_t rs_free_blocks; |
| 20 | uint32_t rs_root_block; |
| 21 | uint32_t rs_journal_block; |
| 22 | uint32_t rs_journal_dev; |
| 23 | uint32_t rs_orig_journal_size; |
| 24 | uint32_t rs_dummy2[5]; |
| 25 | uint16_t rs_blocksize; |
| 26 | uint16_t rs_dummy3[3]; |
| 27 | unsigned char rs_magic[12]; |
| 28 | uint32_t rs_dummy4[5]; |
| 29 | unsigned char rs_uuid[16]; |
| 30 | char rs_label[16]; |
| 31 | } __attribute__((packed)); |
| 32 | |
| 33 | struct reiser4_super_block { |
| 34 | unsigned char rs4_magic[16]; |
| 35 | uint16_t rs4_dummy[2]; |
| 36 | unsigned char rs4_uuid[16]; |
| 37 | unsigned char rs4_label[16]; |
| 38 | uint64_t rs4_dummy2; |
| 39 | } __attribute__((packed)); |
| 40 | |
| 41 | static int probe_reiser(blkid_probe pr, const struct blkid_idmag *mag) |
| 42 | { |
| 43 | struct reiserfs_super_block *rs; |
| 44 | unsigned int blocksize; |
| 45 | |
| 46 | rs = blkid_probe_get_sb(pr, mag, struct reiserfs_super_block); |
| 47 | if (!rs) |
| 48 | return -1; |
| 49 | |
| 50 | blocksize = le16_to_cpu(rs->rs_blocksize); |
| 51 | |
| 52 | /* The blocksize must be at least 512B */ |
| 53 | if ((blocksize >> 9) == 0) |
| 54 | return -BLKID_ERR_PARAM; |
| 55 | |
| 56 | /* If the superblock is inside the journal, we have the wrong one */ |
| 57 | if (mag->kboff / (blocksize >> 9) > le32_to_cpu(rs->rs_journal_block) / 2) |
| 58 | return -BLKID_ERR_BIG; |
| 59 | |
| 60 | /* LABEL/UUID are only valid for later versions of Reiserfs v3.6. */ |
| 61 | if (mag->magic[6] == '2' || mag->magic[6] == '3') { |
| 62 | if (*rs->rs_label) |
| 63 | blkid_probe_set_label(pr, |
| 64 | (unsigned char *) rs->rs_label, |
| 65 | sizeof(rs->rs_label)); |
| 66 | blkid_probe_set_uuid(pr, rs->rs_uuid); |
| 67 | } |
| 68 | |
| 69 | if (mag->magic[6] == '3') |
| 70 | blkid_probe_set_version(pr, "JR"); |
| 71 | else if (mag->magic[6] == '2') |
| 72 | blkid_probe_set_version(pr, "3.6"); |
| 73 | else |
| 74 | blkid_probe_set_version(pr, "3.5"); |
| 75 | |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | static int probe_reiser4(blkid_probe pr, const struct blkid_idmag *mag) |
| 80 | { |
| 81 | struct reiser4_super_block *rs4; |
| 82 | |
| 83 | rs4 = blkid_probe_get_sb(pr, mag, struct reiser4_super_block); |
| 84 | if (!rs4) |
| 85 | return -1; |
| 86 | |
| 87 | if (*rs4->rs4_label) |
| 88 | blkid_probe_set_label(pr, rs4->rs4_label, sizeof(rs4->rs4_label)); |
| 89 | blkid_probe_set_uuid(pr, rs4->rs4_uuid); |
| 90 | blkid_probe_set_version(pr, "4"); |
| 91 | |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | |
| 96 | const struct blkid_idinfo reiser_idinfo = |
| 97 | { |
| 98 | .name = "reiserfs", |
| 99 | .usage = BLKID_USAGE_FILESYSTEM, |
| 100 | .probefunc = probe_reiser, |
| 101 | .minsz = 128 * 1024, |
| 102 | .magics = |
| 103 | { |
| 104 | { .magic = "ReIsErFs", .len = 8, .kboff = 8, .sboff = 0x34 }, |
| 105 | { .magic = "ReIsEr2Fs", .len = 9, .kboff = 64, .sboff = 0x34 }, |
| 106 | { .magic = "ReIsEr3Fs", .len = 9, .kboff = 64, .sboff = 0x34 }, |
| 107 | { .magic = "ReIsErFs", .len = 8, .kboff = 64, .sboff = 0x34 }, |
| 108 | { .magic = "ReIsErFs", .len = 8, .kboff = 8, .sboff = 20 }, |
| 109 | { NULL } |
| 110 | } |
| 111 | }; |
| 112 | |
| 113 | const struct blkid_idinfo reiser4_idinfo = |
| 114 | { |
| 115 | .name = "reiser4", |
| 116 | .usage = BLKID_USAGE_FILESYSTEM, |
| 117 | .probefunc = probe_reiser4, |
| 118 | .minsz = 128 * 1024, |
| 119 | .magics = |
| 120 | { |
| 121 | { .magic = "ReIsEr4", .len = 7, .kboff = 64 }, |
| 122 | { NULL } |
| 123 | } |
| 124 | }; |
| 125 | |
| 126 | |
| 127 | |
| 128 | |