extras/volume_id/lib/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 program is free software; you can redistribute it and/or modify it
   7  *      under the terms of the GNU General Public License as published by the
   8  *      Free Software Foundation version 2 of the License.
   9  */
  10
  11 #ifndef _GNU_SOURCE
  12 #define _GNU_SOURCE 1
  13 #endif
  14
  15 #ifdef HAVE_CONFIG_H
  16 #  include <config.h>
  17 #endif
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <string.h>
  23 #include <errno.h>
  24 #include <ctype.h>
  25
  26 #include "libvolume_id.h"
  27 #include "util.h"
  28
  29 struct ufs_super_block {
  30         uint32_t        fs_link;
  31         uint32_t        fs_rlink;
  32         uint32_t        fs_sblkno;
  33         uint32_t        fs_cblkno;
  34         uint32_t        fs_iblkno;
  35         uint32_t        fs_dblkno;
  36         uint32_t        fs_cgoffset;
  37         uint32_t        fs_cgmask;
  38         uint32_t        fs_time;
  39         uint32_t        fs_size;
  40         uint32_t        fs_dsize;
  41         uint32_t        fs_ncg;
  42         uint32_t        fs_bsize;
  43         uint32_t        fs_fsize;
  44         uint32_t        fs_frag;
  45         uint32_t        fs_minfree;
  46         uint32_t        fs_rotdelay;
  47         uint32_t        fs_rps;
  48         uint32_t        fs_bmask;
  49         uint32_t        fs_fmask;
  50         uint32_t        fs_bshift;
  51         uint32_t        fs_fshift;
  52         uint32_t        fs_maxcontig;
  53         uint32_t        fs_maxbpg;
  54         uint32_t        fs_fragshift;
  55         uint32_t        fs_fsbtodb;
  56         uint32_t        fs_sbsize;
  57         uint32_t        fs_csmask;
  58         uint32_t        fs_csshift;
  59         uint32_t        fs_nindir;
  60         uint32_t        fs_inopb;
  61         uint32_t        fs_nspf;
  62         uint32_t        fs_optim;
  63         uint32_t        fs_npsect_state;
  64         uint32_t        fs_interleave;
  65         uint32_t        fs_trackskew;
  66         uint32_t        fs_id[2];
  67         uint32_t        fs_csaddr;
  68         uint32_t        fs_cssize;
  69         uint32_t        fs_cgsize;
  70         uint32_t        fs_ntrak;
  71         uint32_t        fs_nsect;
  72         uint32_t        fs_spc;
  73         uint32_t        fs_ncyl;
  74         uint32_t        fs_cpg;
  75         uint32_t        fs_ipg;
  76         uint32_t        fs_fpg;
  77         struct ufs_csum {
  78                 uint32_t        cs_ndir;
  79                 uint32_t        cs_nbfree;
  80                 uint32_t        cs_nifree;
  81                 uint32_t        cs_nffree;
  82         } PACKED fs_cstotal;
  83         int8_t          fs_fmod;
  84         int8_t          fs_clean;
  85         int8_t          fs_ronly;
  86         int8_t          fs_flags;
  87         union {
  88                 struct {
  89                         int8_t  fs_fsmnt[512];
  90                         uint32_t        fs_cgrotor;
  91                         uint32_t        fs_csp[31];
  92                         uint32_t        fs_maxcluster;
  93                         uint32_t        fs_cpc;
  94                         uint16_t        fs_opostbl[16][8];
  95                 } PACKED fs_u1;
  96                 struct {
  97                         int8_t          fs_fsmnt[468];
  98                         uint8_t         fs_volname[32];
  99                         uint64_t        fs_swuid;
 100                         int32_t         fs_pad;
 101                         uint32_t        fs_cgrotor;
 102                         uint32_t        fs_ocsp[28];
 103                         uint32_t        fs_contigdirs;
 104                         uint32_t        fs_csp;
 105                         uint32_t        fs_maxcluster;
 106                         uint32_t        fs_active;
 107                         int32_t         fs_old_cpc;
 108                         int32_t         fs_maxbsize;
 109                         int64_t         fs_sparecon64[17];
 110                         int64_t         fs_sblockloc;
 111                         struct ufs2_csum_total {
 112                                 uint64_t        cs_ndir;
 113                                 uint64_t        cs_nbfree;
 114                                 uint64_t        cs_nifree;
 115                                 uint64_t        cs_nffree;
 116                                 uint64_t        cs_numclusters;
 117                                 uint64_t        cs_spare[3];
 118                         } PACKED fs_cstotal;
 119                         struct ufs_timeval {
 120                                 int32_t         tv_sec;
 121                                 int32_t         tv_usec;
 122                         } PACKED fs_time;
 123                         int64_t         fs_size;
 124                         int64_t         fs_dsize;
 125                         uint64_t        fs_csaddr;
 126                         int64_t         fs_pendingblocks;
 127                         int32_t         fs_pendinginodes;
 128                 } PACKED fs_u2;
 129         }  fs_u11;
 130         union {
 131                 struct {
 132                         int32_t         fs_sparecon[53];
 133                         int32_t         fs_reclaim;
 134                         int32_t         fs_sparecon2[1];
 135                         int32_t         fs_state;
 136                         uint32_t        fs_qbmask[2];
 137                         uint32_t        fs_qfmask[2];
 138                 } PACKED fs_sun;
 139                 struct {
 140                         int32_t         fs_sparecon[53];
 141                         int32_t         fs_reclaim;
 142                         int32_t         fs_sparecon2[1];
 143                         uint32_t        fs_npsect;
 144                         uint32_t        fs_qbmask[2];
 145                         uint32_t        fs_qfmask[2];
 146                 } PACKED fs_sunx86;
 147                 struct {
 148                         int32_t         fs_sparecon[50];
 149                         int32_t         fs_contigsumsize;
 150                         int32_t         fs_maxsymlinklen;
 151                         int32_t         fs_inodefmt;
 152                         uint32_t        fs_maxfilesize[2];
 153                         uint32_t        fs_qbmask[2];
 154                         uint32_t        fs_qfmask[2];
 155                         int32_t         fs_state;
 156                 } PACKED fs_44;
 157         } fs_u2;
 158         int32_t         fs_postblformat;
 159         int32_t         fs_nrpos;
 160         int32_t         fs_postbloff;
 161         int32_t         fs_rotbloff;
 162         uint32_t        fs_magic;
 163         uint8_t         fs_space[1];
 164 } PACKED;
 165
 166 #define UFS_MAGIC                       0x00011954
 167 #define UFS2_MAGIC                      0x19540119
 168 #define UFS_MAGIC_FEA                   0x00195612
 169 #define UFS_MAGIC_LFN                   0x00095014
 170
 171 int volume_id_probe_ufs(struct volume_id *id, uint64_t off, uint64_t size)
 172 {
 173         uint32_t magic;
 174         int i;
 175         struct ufs_super_block *ufs;
 176         int offsets[] = {0, 8, 64, 256, -1};
 177
 178         info("probing at offset 0x%llx", (unsigned long long) off);
 179
 180         for (i = 0; offsets[i] >= 0; i++) {
 181                 ufs = (struct ufs_super_block *) volume_id_get_buffer(id, off + (offsets[i] * 0x400), 0x800);
 182                 if (ufs == NULL)
 183                         return -1;
 184
 185                 dbg("offset 0x%x", offsets[i] * 0x400);
 186                 magic = be32_to_cpu(ufs->fs_magic);
 187                 if ((magic == UFS_MAGIC) ||
 188                     (magic == UFS2_MAGIC) ||
 189                     (magic == UFS_MAGIC_FEA) ||
 190                     (magic == UFS_MAGIC_LFN)) {
 191                         dbg("magic 0x%08x(be)", magic);
 192                         goto found;
 193                 }
 194                 magic = le32_to_cpu(ufs->fs_magic);
 195                 if ((magic == UFS_MAGIC) ||
 196                     (magic == UFS2_MAGIC) ||
 197                     (magic == UFS_MAGIC_FEA) ||
 198                     (magic == UFS_MAGIC_LFN)) {
 199                         dbg("magic 0x%08x(le)", magic);
 200                         goto found;
 201                 }
 202         }
 203         return -1;
 204
 205 found:
 206         volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
 207         id->type = "ufs";
 208         switch (magic) {
 209         case UFS_MAGIC:
 210                 strcpy(id->type_version, "1");
 211                 break;
 212         case UFS2_MAGIC:
 213                 strcpy(id->type_version, "2");
 214                 volume_id_set_label_raw(id, ufs->fs_u11.fs_u2.fs_volname, 32);
 215                 volume_id_set_label_string(id, ufs->fs_u11.fs_u2.fs_volname, 32);
 216                 break;
 217         default:
 218                 break;
 219         }
 220
 221         return 0;
 222 }