2 * volume_id - reads filesystem label and uuid
4 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
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.
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.
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
21 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_EXT) += ext.o
23 //config:config FEATURE_VOLUMEID_EXT
24 //config: bool "Ext filesystem"
26 //config: depends on VOLUMEID
28 #include "volume_id_internal.h"
29 #include "bb_e2fs_defs.h"
31 #define EXT_SUPERBLOCK_OFFSET 0x400
33 int FAST_FUNC volume_id_probe_ext(struct volume_id *id /*,uint64_t off*/)
35 #define off ((uint64_t)0)
36 struct ext2_super_block *es;
38 dbg("ext: probing at offset 0x%llx", (unsigned long long) off);
40 es = volume_id_get_buffer(id, off + EXT_SUPERBLOCK_OFFSET, 0x200);
44 if (es->s_magic != cpu_to_le16(EXT2_SUPER_MAGIC)) {
45 dbg("ext: no magic found");
49 // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
50 // volume_id_set_label_raw(id, es->volume_name, 16);
51 volume_id_set_label_string(id, (void*)es->s_volume_name, 16);
52 volume_id_set_uuid(id, es->s_uuid, UUID_DCE);
53 dbg("ext: label '%s' uuid '%s'", id->label, id->uuid);
55 #if ENABLE_FEATURE_BLKID_TYPE
56 if ((es->s_feature_ro_compat & cpu_to_le32(EXT4_FEATURE_RO_COMPAT_HUGE_FILE | EXT4_FEATURE_RO_COMPAT_DIR_NLINK))
57 || (es->s_feature_incompat & cpu_to_le32(EXT4_FEATURE_INCOMPAT_EXTENTS | EXT4_FEATURE_INCOMPAT_64BIT))
61 else if (es->s_feature_compat & cpu_to_le32(EXT3_FEATURE_COMPAT_HAS_JOURNAL))