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

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    Revision 816 - (hide 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 niro 816 /*
    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     }