ufs.c revision 2603474ff9be2418900581da1af5cccc9f13cae1
/*
* volume_id - reads filesystem label and uuid
*
* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation version 2 of the License.
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE 1
#endif
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include "libvolume_id.h"
#include "libvolume_id-private.h"
#include "util.h"
struct ufs_super_block {
uint32_t fs_link;
uint32_t fs_rlink;
uint32_t fs_sblkno;
uint32_t fs_cblkno;
uint32_t fs_iblkno;
uint32_t fs_dblkno;
uint32_t fs_cgoffset;
uint32_t fs_cgmask;
uint32_t fs_time;
uint32_t fs_size;
uint32_t fs_dsize;
uint32_t fs_ncg;
uint32_t fs_bsize;
uint32_t fs_fsize;
uint32_t fs_frag;
uint32_t fs_minfree;
uint32_t fs_rotdelay;
uint32_t fs_rps;
uint32_t fs_bmask;
uint32_t fs_fmask;
uint32_t fs_bshift;
uint32_t fs_fshift;
uint32_t fs_maxcontig;
uint32_t fs_maxbpg;
uint32_t fs_fragshift;
uint32_t fs_fsbtodb;
uint32_t fs_sbsize;
uint32_t fs_csmask;
uint32_t fs_csshift;
uint32_t fs_nindir;
uint32_t fs_inopb;
uint32_t fs_nspf;
uint32_t fs_optim;
uint32_t fs_npsect_state;
uint32_t fs_interleave;
uint32_t fs_trackskew;
uint32_t fs_id[2];
uint32_t fs_csaddr;
uint32_t fs_cssize;
uint32_t fs_cgsize;
uint32_t fs_ntrak;
uint32_t fs_nsect;
uint32_t fs_spc;
uint32_t fs_ncyl;
uint32_t fs_cpg;
uint32_t fs_ipg;
uint32_t fs_fpg;
struct ufs_csum {
uint32_t cs_ndir;
uint32_t cs_nbfree;
uint32_t cs_nifree;
uint32_t cs_nffree;
} PACKED fs_cstotal;
int8_t fs_fmod;
int8_t fs_clean;
int8_t fs_ronly;
int8_t fs_flags;
union {
struct {
int8_t fs_fsmnt[512];
uint32_t fs_cgrotor;
uint32_t fs_csp[31];
uint32_t fs_maxcluster;
uint32_t fs_cpc;
uint16_t fs_opostbl[16][8];
} PACKED fs_u1;
struct {
int8_t fs_fsmnt[468];
uint8_t fs_volname[32];
uint64_t fs_swuid;
int32_t fs_pad;
uint32_t fs_cgrotor;
uint32_t fs_ocsp[28];
uint32_t fs_contigdirs;
uint32_t fs_csp;
uint32_t fs_maxcluster;
uint32_t fs_active;
int32_t fs_old_cpc;
int32_t fs_maxbsize;
int64_t fs_sparecon64[17];
int64_t fs_sblockloc;
struct ufs2_csum_total {
uint64_t cs_ndir;
uint64_t cs_nbfree;
uint64_t cs_nifree;
uint64_t cs_nffree;
uint64_t cs_numclusters;
uint64_t cs_spare[3];
} PACKED fs_cstotal;
struct ufs_timeval {
int32_t tv_sec;
int32_t tv_usec;
} PACKED fs_time;
int64_t fs_size;
int64_t fs_dsize;
uint64_t fs_csaddr;
int64_t fs_pendingblocks;
int32_t fs_pendinginodes;
} PACKED fs_u2;
} fs_u11;
union {
struct {
int32_t fs_sparecon[53];
int32_t fs_reclaim;
int32_t fs_sparecon2[1];
int32_t fs_state;
uint32_t fs_qbmask[2];
uint32_t fs_qfmask[2];
} PACKED fs_sun;
struct {
int32_t fs_sparecon[53];
int32_t fs_reclaim;
int32_t fs_sparecon2[1];
uint32_t fs_npsect;
uint32_t fs_qbmask[2];
uint32_t fs_qfmask[2];
} PACKED fs_sunx86;
struct {
int32_t fs_sparecon[50];
int32_t fs_contigsumsize;
int32_t fs_maxsymlinklen;
int32_t fs_inodefmt;
uint32_t fs_maxfilesize[2];
uint32_t fs_qbmask[2];
uint32_t fs_qfmask[2];
int32_t fs_state;
} PACKED fs_44;
} fs_u2;
int32_t fs_postblformat;
int32_t fs_nrpos;
int32_t fs_postbloff;
int32_t fs_rotbloff;
uint32_t fs_magic;
uint8_t fs_space[1];
} PACKED;
#define UFS_MAGIC 0x00011954
#define UFS2_MAGIC 0x19540119
#define UFS_MAGIC_FEA 0x00195612
#define UFS_MAGIC_LFN 0x00095014
int volume_id_probe_ufs(struct volume_id *id, uint64_t off, uint64_t size)
{
uint32_t magic;
int i;
struct ufs_super_block *ufs;
int offsets[] = {0, 8, 64, 256, -1};
info("probing at offset 0x%llx\n", (unsigned long long) off);
for (i = 0; offsets[i] >= 0; i++) {
ufs = (struct ufs_super_block *) volume_id_get_buffer(id, off + (offsets[i] * 0x400), 0x800);
if (ufs == NULL)
return -1;
dbg("offset 0x%x\n", offsets[i] * 0x400);
magic = be32_to_cpu(ufs->fs_magic);
if ((magic == UFS_MAGIC) ||
(magic == UFS2_MAGIC) ||
(magic == UFS_MAGIC_FEA) ||
(magic == UFS_MAGIC_LFN)) {
dbg("magic 0x%08x(be)\n", magic);
goto found;
}
magic = le32_to_cpu(ufs->fs_magic);
if ((magic == UFS_MAGIC) ||
(magic == UFS2_MAGIC) ||
(magic == UFS_MAGIC_FEA) ||
(magic == UFS_MAGIC_LFN)) {
dbg("magic 0x%08x(le)\n", magic);
goto found;
}
}
return -1;
found:
volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
id->type = "ufs";
switch (magic) {
case UFS_MAGIC:
strcpy(id->type_version, "1");
break;
case UFS2_MAGIC:
strcpy(id->type_version, "2");
volume_id_set_label_raw(id, ufs->fs_u11.fs_u2.fs_volname, 32);
volume_id_set_label_string(id, ufs->fs_u11.fs_u2.fs_volname, 32);
break;
default:
break;
}
return 0;
}