120 lines
3.4 KiB
C
120 lines
3.4 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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* Copyright (C) 2005 Tobias Klauser <tklauser@access.unizh.ch>
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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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//config:config FEATURE_VOLUMEID_REISERFS
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//config: bool "Reiser filesystem"
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//config: default y
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//config: depends on VOLUMEID
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//kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_REISERFS) += reiserfs.o
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#include "volume_id_internal.h"
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struct reiserfs_super_block {
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uint32_t blocks_count;
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uint32_t free_blocks;
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uint32_t root_block;
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uint32_t journal_block;
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uint32_t journal_dev;
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uint32_t orig_journal_size;
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uint32_t dummy2[5];
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uint16_t blocksize;
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uint16_t dummy3[3];
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uint8_t magic[12];
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uint32_t dummy4[5];
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uint8_t uuid[16];
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uint8_t label[16];
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} PACKED;
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struct reiser4_super_block {
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uint8_t magic[16];
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uint16_t dummy[2];
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uint8_t uuid[16];
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uint8_t label[16];
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uint64_t dummy2;
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} PACKED;
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#define REISERFS1_SUPERBLOCK_OFFSET 0x2000
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#define REISERFS_SUPERBLOCK_OFFSET 0x10000
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int FAST_FUNC volume_id_probe_reiserfs(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 reiserfs_super_block *rs;
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struct reiser4_super_block *rs4;
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dbg("reiserfs: probing at offset 0x%llx", (unsigned long long) off);
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rs = volume_id_get_buffer(id, off + REISERFS_SUPERBLOCK_OFFSET, 0x200);
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if (rs == NULL)
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return -1;
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if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
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dbg("reiserfs: ReIsErFs, no label");
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// strcpy(id->type_version, "3.5");
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goto found;
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}
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if (memcmp(rs->magic, "ReIsEr2Fs", 9) == 0) {
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dbg("reiserfs: ReIsEr2Fs");
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// strcpy(id->type_version, "3.6");
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goto found_label;
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}
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if (memcmp(rs->magic, "ReIsEr3Fs", 9) == 0) {
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dbg("reiserfs: ReIsEr3Fs");
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// strcpy(id->type_version, "JR");
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goto found_label;
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}
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rs4 = (struct reiser4_super_block *) rs;
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if (memcmp(rs4->magic, "ReIsEr4", 7) == 0) {
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// strcpy(id->type_version, "4");
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// volume_id_set_label_raw(id, rs4->label, 16);
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volume_id_set_label_string(id, rs4->label, 16);
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volume_id_set_uuid(id, rs4->uuid, UUID_DCE);
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dbg("reiserfs: ReIsEr4, label '%s' uuid '%s'", id->label, id->uuid);
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goto found;
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}
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rs = volume_id_get_buffer(id, off + REISERFS1_SUPERBLOCK_OFFSET, 0x200);
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if (rs == NULL)
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return -1;
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if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
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dbg("reiserfs: ReIsErFs, no label");
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// strcpy(id->type_version, "3.5");
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goto found;
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}
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dbg("reiserfs: no signature found");
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return -1;
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found_label:
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// volume_id_set_label_raw(id, rs->label, 16);
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volume_id_set_label_string(id, rs->label, 16);
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volume_id_set_uuid(id, rs->uuid, UUID_DCE);
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dbg("reiserfs: label '%s' uuid '%s'", id->label, id->uuid);
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found:
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// volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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IF_FEATURE_BLKID_TYPE(id->type = "reiserfs";)
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return 0;
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}
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