228 lines
5.3 KiB
C
228 lines
5.3 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 program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE 1
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <ctype.h>
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#include "libvolume_id.h"
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#include "libvolume_id-private.h"
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struct ufs_super_block {
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uint32_t fs_link;
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uint32_t fs_rlink;
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uint32_t fs_sblkno;
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uint32_t fs_cblkno;
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uint32_t fs_iblkno;
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uint32_t fs_dblkno;
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uint32_t fs_cgoffset;
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uint32_t fs_cgmask;
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uint32_t fs_time;
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uint32_t fs_size;
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uint32_t fs_dsize;
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uint32_t fs_ncg;
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uint32_t fs_bsize;
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uint32_t fs_fsize;
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uint32_t fs_frag;
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uint32_t fs_minfree;
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uint32_t fs_rotdelay;
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uint32_t fs_rps;
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uint32_t fs_bmask;
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uint32_t fs_fmask;
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uint32_t fs_bshift;
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uint32_t fs_fshift;
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uint32_t fs_maxcontig;
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uint32_t fs_maxbpg;
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uint32_t fs_fragshift;
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uint32_t fs_fsbtodb;
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uint32_t fs_sbsize;
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uint32_t fs_csmask;
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uint32_t fs_csshift;
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uint32_t fs_nindir;
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uint32_t fs_inopb;
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uint32_t fs_nspf;
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uint32_t fs_optim;
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uint32_t fs_npsect_state;
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uint32_t fs_interleave;
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uint32_t fs_trackskew;
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uint32_t fs_id[2];
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uint32_t fs_csaddr;
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uint32_t fs_cssize;
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uint32_t fs_cgsize;
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uint32_t fs_ntrak;
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uint32_t fs_nsect;
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uint32_t fs_spc;
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uint32_t fs_ncyl;
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uint32_t fs_cpg;
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uint32_t fs_ipg;
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uint32_t fs_fpg;
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struct ufs_csum {
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uint32_t cs_ndir;
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uint32_t cs_nbfree;
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uint32_t cs_nifree;
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uint32_t cs_nffree;
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} PACKED fs_cstotal;
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int8_t fs_fmod;
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int8_t fs_clean;
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int8_t fs_ronly;
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int8_t fs_flags;
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union {
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struct {
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int8_t fs_fsmnt[512];
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uint32_t fs_cgrotor;
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uint32_t fs_csp[31];
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uint32_t fs_maxcluster;
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uint32_t fs_cpc;
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uint16_t fs_opostbl[16][8];
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} PACKED fs_u1;
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struct {
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int8_t fs_fsmnt[468];
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uint8_t fs_volname[32];
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uint64_t fs_swuid;
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int32_t fs_pad;
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uint32_t fs_cgrotor;
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uint32_t fs_ocsp[28];
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uint32_t fs_contigdirs;
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uint32_t fs_csp;
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uint32_t fs_maxcluster;
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uint32_t fs_active;
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int32_t fs_old_cpc;
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int32_t fs_maxbsize;
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int64_t fs_sparecon64[17];
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int64_t fs_sblockloc;
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struct ufs2_csum_total {
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uint64_t cs_ndir;
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uint64_t cs_nbfree;
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uint64_t cs_nifree;
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uint64_t cs_nffree;
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uint64_t cs_numclusters;
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uint64_t cs_spare[3];
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} PACKED fs_cstotal;
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struct ufs_timeval {
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int32_t tv_sec;
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int32_t tv_usec;
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} PACKED fs_time;
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int64_t fs_size;
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int64_t fs_dsize;
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uint64_t fs_csaddr;
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int64_t fs_pendingblocks;
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int32_t fs_pendinginodes;
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} PACKED fs_u2;
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} fs_u11;
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union {
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struct {
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int32_t fs_sparecon[53];
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int32_t fs_reclaim;
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int32_t fs_sparecon2[1];
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int32_t fs_state;
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uint32_t fs_qbmask[2];
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uint32_t fs_qfmask[2];
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} PACKED fs_sun;
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struct {
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int32_t fs_sparecon[53];
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int32_t fs_reclaim;
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int32_t fs_sparecon2[1];
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uint32_t fs_npsect;
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uint32_t fs_qbmask[2];
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uint32_t fs_qfmask[2];
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} PACKED fs_sunx86;
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struct {
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int32_t fs_sparecon[50];
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int32_t fs_contigsumsize;
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int32_t fs_maxsymlinklen;
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int32_t fs_inodefmt;
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uint32_t fs_maxfilesize[2];
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uint32_t fs_qbmask[2];
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uint32_t fs_qfmask[2];
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int32_t fs_state;
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} PACKED fs_44;
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} fs_u2;
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int32_t fs_postblformat;
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int32_t fs_nrpos;
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int32_t fs_postbloff;
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int32_t fs_rotbloff;
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uint32_t fs_magic;
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uint8_t fs_space[1];
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} PACKED;
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#define UFS_MAGIC 0x00011954
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#define UFS2_MAGIC 0x19540119
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#define UFS_MAGIC_FEA 0x00195612
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#define UFS_MAGIC_LFN 0x00095014
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int volume_id_probe_ufs(struct volume_id *id, uint64_t off, uint64_t size)
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{
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uint32_t magic;
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int i;
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struct ufs_super_block *ufs;
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int offsets[] = {0, 8, 64, 256, -1};
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info("probing at offset 0x%llx\n", (unsigned long long) off);
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for (i = 0; offsets[i] >= 0; i++) {
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ufs = (struct ufs_super_block *) volume_id_get_buffer(id, off + (offsets[i] * 0x400), 0x800);
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if (ufs == NULL)
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return -1;
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dbg("offset 0x%x\n", offsets[i] * 0x400);
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magic = be32_to_cpu(ufs->fs_magic);
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if ((magic == UFS_MAGIC) ||
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(magic == UFS2_MAGIC) ||
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(magic == UFS_MAGIC_FEA) ||
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(magic == UFS_MAGIC_LFN)) {
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dbg("magic 0x%08x(be)\n", magic);
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goto found;
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}
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magic = le32_to_cpu(ufs->fs_magic);
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if ((magic == UFS_MAGIC) ||
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(magic == UFS2_MAGIC) ||
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(magic == UFS_MAGIC_FEA) ||
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(magic == UFS_MAGIC_LFN)) {
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dbg("magic 0x%08x(le)\n", magic);
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goto found;
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}
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}
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return -1;
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found:
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volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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id->type = "ufs";
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switch (magic) {
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case UFS_MAGIC:
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strcpy(id->type_version, "1");
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break;
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case UFS2_MAGIC:
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strcpy(id->type_version, "2");
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volume_id_set_label_raw(id, ufs->fs_u11.fs_u2.fs_volname, 32);
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volume_id_set_label_string(id, ufs->fs_u11.fs_u2.fs_volname, 32);
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break;
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default:
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break;
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}
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return 0;
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}
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