blob: 4c39e537af0b679cbf7c1e3c51cef7a8dce08754 [file] [log] [blame]
Denis Vlasenkode7684a2008-02-18 21:08:49 +00001/*
2 * volume_id - reads filesystem label and uuid
3 *
4 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include "volume_id_internal.h"
22
23struct jfs_super_block {
24 uint8_t magic[4];
25 uint32_t version;
26 uint64_t size;
27 uint32_t bsize;
28 uint32_t dummy1;
29 uint32_t pbsize;
30 uint32_t dummy2[27];
31 uint8_t uuid[16];
32 uint8_t label[16];
33 uint8_t loguuid[16];
34} __attribute__((__packed__));
35
36#define JFS_SUPERBLOCK_OFFSET 0x8000
37
Denis Vlasenko28ea4292009-02-15 05:51:19 +000038int volume_id_probe_jfs(struct volume_id *id /*,uint64_t off*/)
Denis Vlasenkode7684a2008-02-18 21:08:49 +000039{
Denis Vlasenko28ea4292009-02-15 05:51:19 +000040#define off ((uint64_t)0)
Denis Vlasenkode7684a2008-02-18 21:08:49 +000041 struct jfs_super_block *js;
42
43 dbg("probing at offset 0x%llx", (unsigned long long) off);
44
45 js = volume_id_get_buffer(id, off + JFS_SUPERBLOCK_OFFSET, 0x200);
46 if (js == NULL)
47 return -1;
48
49 if (memcmp(js->magic, "JFS1", 4) != 0)
50 return -1;
51
Denis Vlasenkoc5b73722008-03-17 09:21:26 +000052// volume_id_set_label_raw(id, js->label, 16);
Denis Vlasenkode7684a2008-02-18 21:08:49 +000053 volume_id_set_label_string(id, js->label, 16);
54 volume_id_set_uuid(id, js->uuid, UUID_DCE);
55
Denis Vlasenkoc5b73722008-03-17 09:21:26 +000056// volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
57// id->type = "jfs";
Denis Vlasenkode7684a2008-02-18 21:08:49 +000058
59 return 0;
60}