61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
/*
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* volume_id - reads filesystem label and uuid
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*
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* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "volume_id_internal.h"
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#include "bb_e2fs_defs.h"
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#define EXT_SUPERBLOCK_OFFSET 0x400
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int FAST_FUNC volume_id_probe_ext(struct volume_id *id /*,uint64_t off*/)
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{
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#define off ((uint64_t)0)
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struct ext2_super_block *es;
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dbg("ext: probing at offset 0x%llx", (unsigned long long) off);
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es = volume_id_get_buffer(id, off + EXT_SUPERBLOCK_OFFSET, 0x200);
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if (es == NULL)
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return -1;
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if (es->s_magic != cpu_to_le16(EXT2_SUPER_MAGIC)) {
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dbg("ext: no magic found");
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return -1;
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}
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// volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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// volume_id_set_label_raw(id, es->volume_name, 16);
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volume_id_set_label_string(id, (void*)es->s_volume_name, 16);
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volume_id_set_uuid(id, es->s_uuid, UUID_DCE);
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dbg("ext: label '%s' uuid '%s'", id->label, id->uuid);
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#if ENABLE_FEATURE_BLKID_TYPE
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if ((es->s_feature_ro_compat & cpu_to_le32(EXT4_FEATURE_RO_COMPAT_HUGE_FILE | EXT4_FEATURE_RO_COMPAT_DIR_NLINK))
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|| (es->s_feature_incompat & cpu_to_le32(EXT4_FEATURE_INCOMPAT_EXTENTS | EXT4_FEATURE_INCOMPAT_64BIT))
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) {
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id->type = "ext4";
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}
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else if (es->s_feature_compat & cpu_to_le32(EXT3_FEATURE_COMPAT_HAS_JOURNAL))
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id->type = "ext3";
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else
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id->type = "ext2";
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#endif
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return 0;
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}
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