extras/volume_id/volume_id/ufs.c

   1 /*
   2  * volume_id - reads filesystem label and uuid
   3  *
   4  * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
   5  *
   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.
  10  *
  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.
  15  *
  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
  19  */
  20
  21 #ifndef _GNU_SOURCE
  22 #define _GNU_SOURCE 1
  23 #endif
  24
  25 #ifdef HAVE_CONFIG_H
  26 #  include <config.h>
  27 #endif
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <unistd.h>
  32 #include <string.h>
  33 #include <errno.h>
  34 #include <ctype.h>
  35 #include <asm/types.h>
  36
  37 #include "volume_id.h"
  38 #include "logging.h"
  39 #include "util.h"
  40 #include "ufs.h"
  41
  42 struct ufs_super_block {
  43         __u32   fs_link;
  44         __u32   fs_rlink;
  45         __u32   fs_sblkno;
  46         __u32   fs_cblkno;
  47         __u32   fs_iblkno;
  48         __u32   fs_dblkno;
  49         __u32   fs_cgoffset;
  50         __u32   fs_cgmask;
  51         __u32   fs_time;
  52         __u32   fs_size;
  53         __u32   fs_dsize;
  54         __u32   fs_ncg;
  55         __u32   fs_bsize;
  56         __u32   fs_fsize;
  57         __u32   fs_frag;
  58         __u32   fs_minfree;
  59         __u32   fs_rotdelay;
  60         __u32   fs_rps;
  61         __u32   fs_bmask;
  62         __u32   fs_fmask;
  63         __u32   fs_bshift;
  64         __u32   fs_fshift;
  65         __u32   fs_maxcontig;
  66         __u32   fs_maxbpg;
  67         __u32   fs_fragshift;
  68         __u32   fs_fsbtodb;
  69         __u32   fs_sbsize;
  70         __u32   fs_csmask;
  71         __u32   fs_csshift;
  72         __u32   fs_nindir;
  73         __u32   fs_inopb;
  74         __u32   fs_nspf;
  75         __u32   fs_optim;
  76         __u32   fs_npsect_state;
  77         __u32   fs_interleave;
  78         __u32   fs_trackskew;
  79         __u32   fs_id[2];
  80         __u32   fs_csaddr;
  81         __u32   fs_cssize;
  82         __u32   fs_cgsize;
  83         __u32   fs_ntrak;
  84         __u32   fs_nsect;
  85         __u32   fs_spc;
  86         __u32   fs_ncyl;
  87         __u32   fs_cpg;
  88         __u32   fs_ipg;
  89         __u32   fs_fpg;
  90         struct ufs_csum {
  91                 __u32   cs_ndir;
  92                 __u32   cs_nbfree;
  93                 __u32   cs_nifree;
  94                 __u32   cs_nffree;
  95         } __attribute__((__packed__)) fs_cstotal;
  96         __s8    fs_fmod;
  97         __s8    fs_clean;
  98         __s8    fs_ronly;
  99         __s8    fs_flags;
 100         union {
 101                 struct {
 102                         __s8    fs_fsmnt[512];
 103                         __u32   fs_cgrotor;
 104                         __u32   fs_csp[31];
 105                         __u32   fs_maxcluster;
 106                         __u32   fs_cpc;
 107                         __u16   fs_opostbl[16][8];
 108                 } __attribute__((__packed__)) fs_u1;
 109                 struct {
 110                         __s8    fs_fsmnt[468];
 111                         __u8    fs_volname[32];
 112                         __u64   fs_swuid;
 113                         __s32   fs_pad;
 114                         __u32   fs_cgrotor;
 115                         __u32   fs_ocsp[28];
 116                         __u32   fs_contigdirs;
 117                         __u32   fs_csp;
 118                         __u32   fs_maxcluster;
 119                         __u32   fs_active;
 120                         __s32   fs_old_cpc;
 121                         __s32   fs_maxbsize;
 122                         __s64   fs_sparecon64[17];
 123                         __s64   fs_sblockloc;
 124                         struct ufs2_csum_total {
 125                                 __u64   cs_ndir;
 126                                 __u64   cs_nbfree;
 127                                 __u64   cs_nifree;
 128                                 __u64   cs_nffree;
 129                                 __u64   cs_numclusters;
 130                                 __u64   cs_spare[3];
 131                         } __attribute__((__packed__)) fs_cstotal;
 132                         struct ufs_timeval {
 133                                 __s32   tv_sec;
 134                                 __s32   tv_usec;
 135                         } __attribute__((__packed__)) fs_time;
 136                         __s64   fs_size;
 137                         __s64   fs_dsize;
 138                         __u64   fs_csaddr;
 139                         __s64   fs_pendingblocks;
 140                         __s32   fs_pendinginodes;
 141                 } __attribute__((__packed__)) fs_u2;
 142         }  fs_u11;
 143         union {
 144                 struct {
 145                         __s32   fs_sparecon[53];
 146                         __s32   fs_reclaim;
 147                         __s32   fs_sparecon2[1];
 148                         __s32   fs_state;
 149                         __u32   fs_qbmask[2];
 150                         __u32   fs_qfmask[2];
 151                 } __attribute__((__packed__)) fs_sun;
 152                 struct {
 153                         __s32   fs_sparecon[53];
 154                         __s32   fs_reclaim;
 155                         __s32   fs_sparecon2[1];
 156                         __u32   fs_npsect;
 157                         __u32   fs_qbmask[2];
 158                         __u32   fs_qfmask[2];
 159                 } __attribute__((__packed__)) fs_sunx86;
 160                 struct {
 161                         __s32   fs_sparecon[50];
 162                         __s32   fs_contigsumsize;
 163                         __s32   fs_maxsymlinklen;
 164                         __s32   fs_inodefmt;
 165                         __u32   fs_maxfilesize[2];
 166                         __u32   fs_qbmask[2];
 167                         __u32   fs_qfmask[2];
 168                         __s32   fs_state;
 169                 } __attribute__((__packed__)) fs_44;
 170         } fs_u2;
 171         __s32   fs_postblformat;
 172         __s32   fs_nrpos;
 173         __s32   fs_postbloff;
 174         __s32   fs_rotbloff;
 175         __u32   fs_magic;
 176         __u8    fs_space[1];
 177 } __attribute__((__packed__));
 178
 179 #define UFS_MAGIC                       0x00011954
 180 #define UFS2_MAGIC                      0x19540119
 181 #define UFS_MAGIC_FEA                   0x00195612
 182 #define UFS_MAGIC_LFN                   0x00095014
 183
 184 int volume_id_probe_ufs(struct volume_id *id, __u64 off)
 185 {
 186         __u32   magic;
 187         int     i;
 188         struct ufs_super_block *ufs;
 189         int     offsets[] = {0, 8, 64, 256, -1};
 190
 191         dbg("probing at offset %llu", off);
 192
 193         for (i = 0; offsets[i] >= 0; i++) {
 194                 ufs = (struct ufs_super_block *) volume_id_get_buffer(id, off + (offsets[i] * 0x400), 0x800);
 195                 if (ufs == NULL)
 196                         return -1;
 197
 198                 dbg("offset 0x%x", offsets[i] * 0x400);
 199                 magic = be32_to_cpu(ufs->fs_magic);
 200                 if ((magic == UFS_MAGIC) ||
 201                     (magic == UFS2_MAGIC) ||
 202                     (magic == UFS_MAGIC_FEA) ||
 203                     (magic == UFS_MAGIC_LFN)) {
 204                         dbg("magic 0x%08x(be)", magic);
 205                         goto found;
 206                 }
 207                 magic = le32_to_cpu(ufs->fs_magic);
 208                 if ((magic == UFS_MAGIC) ||
 209                     (magic == UFS2_MAGIC) ||
 210                     (magic == UFS_MAGIC_FEA) ||
 211                     (magic == UFS_MAGIC_LFN)) {
 212                         dbg("magic 0x%08x(le)", magic);
 213                         goto found;
 214                 }
 215         }
 216         return -1;
 217
 218 found:
 219         volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
 220         id->type = "ufs";
 221
 222         return 0;
 223 }