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    Contents of /trunk/mkinitrd-magellan/busybox/util-linux/volume_id/reiserfs.c

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    Revision 816 - (show annotations) (download)
    Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
    File MIME type: text/plain
    File size: 3244 byte(s) 
    -updated to busybox-1.13.4
    1 /*
    2 * volume_id - reads filesystem label and uuid
    3 *
    4 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
    5 * Copyright (C) 2005 Tobias Klauser <tklauser@access.unizh.ch>
    6 *
    7 * This library is free software; you can redistribute it and/or
    8 * modify it under the terms of the GNU Lesser General Public
    9 * License as published by the Free Software Foundation; either
    10 * version 2.1 of the License, or (at your option) any later version.
    11 *
    12 * This library is distributed in the hope that it will be useful,
    13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
    14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    15 * Lesser General Public License for more details.
    16 *
    17 * You should have received a copy of the GNU Lesser General Public
    18 * License along with this library; if not, write to the Free Software
    19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    20 */
    21
    22 #include "volume_id_internal.h"
    23
    24 struct reiserfs_super_block {
    25 uint32_t blocks_count;
    26 uint32_t free_blocks;
    27 uint32_t root_block;
    28 uint32_t journal_block;
    29 uint32_t journal_dev;
    30 uint32_t orig_journal_size;
    31 uint32_t dummy2[5];
    32 uint16_t blocksize;
    33 uint16_t dummy3[3];
    34 uint8_t magic[12];
    35 uint32_t dummy4[5];
    36 uint8_t uuid[16];
    37 uint8_t label[16];
    38 } __attribute__((__packed__));
    39
    40 struct reiser4_super_block {
    41 uint8_t magic[16];
    42 uint16_t dummy[2];
    43 uint8_t uuid[16];
    44 uint8_t label[16];
    45 uint64_t dummy2;
    46 } __attribute__((__packed__));
    47
    48 #define REISERFS1_SUPERBLOCK_OFFSET 0x2000
    49 #define REISERFS_SUPERBLOCK_OFFSET 0x10000
    50
    51 int volume_id_probe_reiserfs(struct volume_id *id, uint64_t off)
    52 {
    53 struct reiserfs_super_block *rs;
    54 struct reiser4_super_block *rs4;
    55
    56 dbg("reiserfs: probing at offset 0x%llx", (unsigned long long) off);
    57
    58 rs = volume_id_get_buffer(id, off + REISERFS_SUPERBLOCK_OFFSET, 0x200);
    59 if (rs == NULL)
    60 return -1;
    61
    62 if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
    63 dbg("reiserfs: ReIsErFs, no label");
    64 // strcpy(id->type_version, "3.5");
    65 goto found;
    66 }
    67 if (memcmp(rs->magic, "ReIsEr2Fs", 9) == 0) {
    68 dbg("reiserfs: ReIsEr2Fs");
    69 // strcpy(id->type_version, "3.6");
    70 goto found_label;
    71 }
    72 if (memcmp(rs->magic, "ReIsEr3Fs", 9) == 0) {
    73 dbg("reiserfs: ReIsEr3Fs");
    74 // strcpy(id->type_version, "JR");
    75 goto found_label;
    76 }
    77
    78 rs4 = (struct reiser4_super_block *) rs;
    79 if (memcmp(rs4->magic, "ReIsEr4", 7) == 0) {
    80 // strcpy(id->type_version, "4");
    81 // volume_id_set_label_raw(id, rs4->label, 16);
    82 volume_id_set_label_string(id, rs4->label, 16);
    83 volume_id_set_uuid(id, rs4->uuid, UUID_DCE);
    84 dbg("reiserfs: ReIsEr4, label '%s' uuid '%s'", id->label, id->uuid);
    85 goto found;
    86 }
    87
    88 rs = volume_id_get_buffer(id, off + REISERFS1_SUPERBLOCK_OFFSET, 0x200);
    89 if (rs == NULL)
    90 return -1;
    91
    92 if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
    93 dbg("reiserfs: ReIsErFs, no label");
    94 // strcpy(id->type_version, "3.5");
    95 goto found;
    96 }
    97
    98 dbg("reiserfs: no signature found");
    99 return -1;
    100
    101 found_label:
    102 // volume_id_set_label_raw(id, rs->label, 16);
    103 volume_id_set_label_string(id, rs->label, 16);
    104 volume_id_set_uuid(id, rs->uuid, UUID_DCE);
    105 dbg("reiserfs: label '%s' uuid '%s'", id->label, id->uuid);
    106
    107 found:
    108 // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
    109 // id->type = "reiserfs";
    110
    111 return 0;
    112 }