fs/ufs.c

   1 /* ufs.c - Unix File System */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2004,2005,2007,2008  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB 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
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <grub/err.h>
  21 #include <grub/file.h>
  22 #include <grub/mm.h>
  23 #include <grub/misc.h>
  24 #include <grub/disk.h>
  25 #include <grub/dl.h>
  26 #include <grub/types.h>
  27
  28
  29 #define GRUB_UFS_MAGIC          0x11954
  30 #define GRUB_UFS2_MAGIC         0x19540119
  31 #define GRUB_UFS_INODE          2
  32 #define GRUB_UFS_FILETYPE_DIR   4
  33 #define GRUB_UFS_FILETYPE_LNK   10
  34 #define GRUB_UFS_MAX_SYMLNK_CNT 8
  35
  36 #define GRUB_UFS_DIRBLKS        12
  37 #define GRUB_UFS_INDIRBLKS      3
  38
  39 #define GRUB_UFS_ATTR_TYPE      0160000
  40 #define GRUB_UFS_ATTR_FILE      0100000
  41 #define GRUB_UFS_ATTR_DIR       0040000
  42 #define GRUB_UFS_ATTR_LNK       0120000
  43
  44 #define GRUB_UFS_VOLNAME_LEN    32
  45
  46 /* Calculate in which group the inode can be found.  */
  47 #define inode_group(inode,sblock) ()
  48
  49 #define UFS_BLKSZ(sblock) (grub_le_to_cpu32 (sblock->bsize))
  50
  51 #define INODE(data,field) (data->ufs_type == UFS1 ? \
  52                            data->inode.  field : data->inode2.  field)
  53 #define INODE_ENDIAN(data,field,bits1,bits2) (data->ufs_type == UFS1 ? \
  54                            grub_le_to_cpu##bits1 (data->inode.field) : \
  55                            grub_le_to_cpu##bits2 (data->inode2.field))
  56 #define INODE_SIZE(data) INODE_ENDIAN (data,size,32,64)
  57 #define INODE_NBLOCKS(data) INODE_ENDIAN (data,nblocks,32,64)
  58
  59 #define INODE_MODE(data) INODE_ENDIAN (data,mode,16,16)
  60 #define INODE_BLKSZ(data) (data->ufs_type == UFS1 ? 4 : 8)
  61 #define INODE_DIRBLOCKS(data,blk) INODE_ENDIAN \
  62                                    (data,blocks.dir_blocks[blk],32,64)
  63 #define INODE_INDIRBLOCKS(data,blk) INODE_ENDIAN \
  64                                      (data,blocks.indir_blocks[blk],32,64)
  65
  66 /* The blocks on which the superblock can be found.  */
  67 static int sblocklist[] = { 128, 16, 0, 512, -1 };
  68
  69 struct grub_ufs_sblock
  70 {
  71   grub_uint8_t unused[16];
  72   /* The offset of the inodes in the cylinder group.  */
  73   grub_uint32_t inoblk_offs;
  74
  75   grub_uint8_t unused2[4];
  76
  77   /* The start of the cylinder group.  */
  78   grub_uint32_t cylg_offset;
  79   grub_uint8_t unused3[4];
  80
  81   grub_uint32_t mtime;
  82   grub_uint8_t unused4[12];
  83
  84   /* The size of a block in bytes.  */
  85   grub_int32_t bsize;
  86   grub_uint8_t unused5[48];
  87
  88   /* The size of filesystem blocks to disk blocks.  */
  89   grub_uint32_t log2_blksz;
  90   grub_uint8_t unused6[40];
  91   grub_uint32_t uuidhi;
  92   grub_uint32_t uuidlow;
  93   grub_uint8_t unused7[32];
  94
  95   /* Inodes stored per cylinder group.  */
  96   grub_uint32_t ino_per_group;
  97
  98   /* The frags per cylinder group.  */
  99   grub_uint32_t frags_per_group;
 100
 101   grub_uint8_t unused8[488];
 102
 103   /* Volume name for UFS2.  */
 104   grub_uint8_t volume_name[GRUB_UFS_VOLNAME_LEN];
 105   grub_uint8_t unused9[360];
 106
 107   grub_uint64_t mtime2;
 108   grub_uint8_t unused10[292];
 109
 110   /* Magic value to check if this is really a UFS filesystem.  */
 111   grub_uint32_t magic;
 112 };
 113
 114 /* UFS inode.  */
 115 struct grub_ufs_inode
 116 {
 117   grub_uint16_t mode;
 118   grub_uint16_t nlinks;
 119   grub_uint16_t uid;
 120   grub_uint16_t gid;
 121   grub_int64_t size;
 122   grub_uint64_t atime;
 123   grub_uint64_t mtime;
 124   grub_uint64_t ctime;
 125   union
 126   {
 127     struct
 128     {
 129       grub_uint32_t dir_blocks[GRUB_UFS_DIRBLKS];
 130       grub_uint32_t indir_blocks[GRUB_UFS_INDIRBLKS];
 131     } blocks;
 132     grub_uint8_t symlink[(GRUB_UFS_DIRBLKS + GRUB_UFS_INDIRBLKS) * 4];
 133   };
 134   grub_uint32_t flags;
 135   grub_uint32_t nblocks;
 136   grub_uint32_t gen;
 137   grub_uint32_t unused;
 138   grub_uint8_t pad[12];
 139 } __attribute__ ((packed));
 140
 141 /* UFS inode.  */
 142 struct grub_ufs2_inode
 143 {
 144   grub_uint16_t mode;
 145   grub_uint16_t nlinks;
 146   grub_uint32_t uid;
 147   grub_uint32_t gid;
 148   grub_uint32_t blocksize;
 149   grub_int64_t size;
 150   grub_int64_t nblocks;
 151   grub_uint64_t atime;
 152   grub_uint64_t mtime;
 153   grub_uint64_t ctime;
 154   grub_uint64_t create_time;
 155   grub_uint32_t atime_sec;
 156   grub_uint32_t mtime_sec;
 157   grub_uint32_t ctime_sec;
 158   grub_uint32_t create_time_sec;
 159   grub_uint32_t gen;
 160   grub_uint32_t kernel_flags;
 161   grub_uint32_t flags;
 162   grub_uint32_t extsz;
 163   grub_uint64_t ext[2];
 164   union
 165   {
 166     struct
 167     {
 168       grub_uint64_t dir_blocks[GRUB_UFS_DIRBLKS];
 169       grub_uint64_t indir_blocks[GRUB_UFS_INDIRBLKS];
 170     } blocks;
 171     grub_uint8_t symlink[(GRUB_UFS_DIRBLKS + GRUB_UFS_INDIRBLKS) * 8];
 172   };
 173
 174   grub_uint8_t unused[24];
 175 } __attribute__ ((packed));
 176
 177 /* Directory entry.  */
 178 struct grub_ufs_dirent
 179 {
 180   grub_uint32_t ino;
 181   grub_uint16_t direntlen;
 182   union
 183   {
 184     grub_uint16_t namelen;
 185     struct
 186     {
 187       grub_uint8_t filetype_bsd;
 188       grub_uint8_t namelen_bsd;
 189     };
 190   };
 191 } __attribute__ ((packed));
 192
 193 /* Information about a "mounted" ufs filesystem.  */
 194 struct grub_ufs_data
 195 {
 196   struct grub_ufs_sblock sblock;
 197   grub_disk_t disk;
 198   union
 199   {
 200     struct grub_ufs_inode inode;
 201     struct grub_ufs2_inode inode2;
 202   };
 203   enum
 204     {
 205       UFS1,
 206       UFS2,
 207       UNKNOWN
 208     } ufs_type;
 209   int ino;
 210   int linknest;
 211 };
 212
 213 static grub_dl_t my_mod;
 214 \f
 215 /* Forward declaration.  */
 216 static grub_err_t grub_ufs_find_file (struct grub_ufs_data *data,
 217                                       const char *path);
 218
 219
 220 static int
 221 grub_ufs_get_file_block (struct grub_ufs_data *data, unsigned int blk)
 222 {
 223   struct grub_ufs_sblock *sblock = &data->sblock;
 224   unsigned int indirsz;
 225   int log2_blksz;
 226
 227   /* Direct.  */
 228   if (blk < GRUB_UFS_DIRBLKS)
 229     return INODE_DIRBLOCKS (data, blk);
 230
 231   log2_blksz = grub_le_to_cpu32 (data->sblock.log2_blksz);
 232
 233   blk -= GRUB_UFS_DIRBLKS;
 234
 235   indirsz = UFS_BLKSZ (sblock) / INODE_BLKSZ (data);
 236   /* Single indirect block.  */
 237   if (blk < indirsz)
 238     {
 239       grub_uint32_t indir[UFS_BLKSZ (sblock) >> 2];
 240       grub_disk_read (data->disk, INODE_INDIRBLOCKS (data, 0) << log2_blksz,
 241                       0, sizeof (indir), indir);
 242       return (data->ufs_type == UFS1) ? indir[blk] : indir[blk << 1];
 243     }
 244   blk -= indirsz;
 245
 246   /* Double indirect block.  */
 247   if (blk < indirsz * indirsz)
 248     {
 249       grub_uint32_t indir[UFS_BLKSZ (sblock) >> 2];
 250
 251       grub_disk_read (data->disk, INODE_INDIRBLOCKS (data, 1) << log2_blksz,
 252                       0, sizeof (indir), indir);
 253       grub_disk_read (data->disk,
 254                       ((data->ufs_type == UFS1) ?
 255                       indir[blk / indirsz] : indir [(blk / indirsz) << 1])
 256                       << log2_blksz,
 257                       0, sizeof (indir), indir);
 258
 259       return (data->ufs_type == UFS1) ?
 260              indir[blk % indirsz] : indir[(blk % indirsz) << 1];
 261     }
 262
 263
 264   grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
 265               "ufs does not support triple indirect blocks");
 266   return 0;
 267 }
 268
 269
 270 /* Read LEN bytes from the file described by DATA starting with byte
 271    POS.  Return the amount of read bytes in READ.  */
 272 static grub_ssize_t
 273 grub_ufs_read_file (struct grub_ufs_data *data,
 274                     void NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t sector,
 275                                        unsigned offset, unsigned length),
 276                     int pos, grub_size_t len, char *buf)
 277 {
 278   struct grub_ufs_sblock *sblock = &data->sblock;
 279   int i;
 280   int blockcnt;
 281
 282   /* Adjust len so it we can't read past the end of the file.  */
 283   if (len > INODE_SIZE (data))
 284     len = INODE_SIZE (data);
 285
 286   blockcnt = (len + pos + UFS_BLKSZ (sblock) - 1) / UFS_BLKSZ (sblock);
 287
 288   for (i = pos / UFS_BLKSZ (sblock); i < blockcnt; i++)
 289     {
 290       int blknr;
 291       int blockoff = pos % UFS_BLKSZ (sblock);
 292       int blockend = UFS_BLKSZ (sblock);
 293
 294       int skipfirst = 0;
 295
 296       blknr = grub_ufs_get_file_block (data, i);
 297       if (grub_errno)
 298         return -1;
 299
 300       /* Last block.  */
 301       if (i == blockcnt - 1)
 302         {
 303           blockend = (len + pos) % UFS_BLKSZ (sblock);
 304
 305           if (!blockend)
 306             blockend = UFS_BLKSZ (sblock);
 307         }
 308
 309       /* First block.  */
 310       if (i == (pos / (int) UFS_BLKSZ (sblock)))
 311         {
 312           skipfirst = blockoff;
 313           blockend -= skipfirst;
 314         }
 315
 316       /* XXX: If the block number is 0 this block is not stored on
 317          disk but is zero filled instead.  */
 318       if (blknr)
 319         {
 320           data->disk->read_hook = read_hook;
 321           grub_disk_read (data->disk,
 322                           blknr << grub_le_to_cpu32 (data->sblock.log2_blksz),
 323                           skipfirst, blockend, buf);
 324           data->disk->read_hook = 0;
 325           if (grub_errno)
 326             return -1;
 327         }
 328       else
 329         grub_memset (buf, UFS_BLKSZ (sblock) - skipfirst, 0);
 330
 331       buf += UFS_BLKSZ (sblock) - skipfirst;
 332     }
 333
 334   return len;
 335 }
 336
 337
 338 /* Read inode INO from the mounted filesystem described by DATA.  This
 339    inode is used by default now.  */
 340 static grub_err_t
 341 grub_ufs_read_inode (struct grub_ufs_data *data, int ino, char *inode)
 342 {
 343   struct grub_ufs_sblock *sblock = &data->sblock;
 344
 345   /* Determine the group the inode is in.  */
 346   int group = ino / grub_le_to_cpu32 (sblock->ino_per_group);
 347
 348   /* Determine the inode within the group.  */
 349   int grpino = ino % grub_le_to_cpu32 (sblock->ino_per_group);
 350
 351   /* The first block of the group.  */
 352   int grpblk = group * (grub_le_to_cpu32 (sblock->frags_per_group));
 353
 354   if (data->ufs_type == UFS1)
 355     {
 356       if (!inode)
 357         {
 358           inode = (char *) &data->inode;
 359           data->ino = ino;
 360         }
 361
 362       grub_disk_read (data->disk,
 363                       (((grub_le_to_cpu32 (sblock->inoblk_offs) + grpblk)
 364                         << grub_le_to_cpu32 (data->sblock.log2_blksz)))
 365                       + grpino / 4,
 366                       (grpino % 4) * sizeof (struct grub_ufs_inode),
 367                       sizeof (struct grub_ufs_inode),
 368                       inode);
 369     }
 370   else
 371     {
 372       if (!inode)
 373         {
 374           inode = (char *) &data->inode2;
 375           data->ino = ino;
 376         }
 377
 378       grub_disk_read (data->disk,
 379                       (((grub_le_to_cpu32 (sblock->inoblk_offs) + grpblk)
 380                         << grub_le_to_cpu32 (data->sblock.log2_blksz)))
 381                       + grpino / 2,
 382                       (grpino % 2) * sizeof (struct grub_ufs2_inode),
 383                       sizeof (struct grub_ufs2_inode),
 384                       inode);
 385     }
 386
 387   return grub_errno;
 388 }
 389
 390
 391 /* Lookup the symlink the current inode points to.  INO is the inode
 392    number of the directory the symlink is relative to.  */
 393 static grub_err_t
 394 grub_ufs_lookup_symlink (struct grub_ufs_data *data, int ino)
 395 {
 396   char symlink[INODE_SIZE (data)];
 397
 398   if (++data->linknest > GRUB_UFS_MAX_SYMLNK_CNT)
 399     return grub_error (GRUB_ERR_SYMLINK_LOOP, "too deep nesting of symlinks");
 400
 401   if (INODE_NBLOCKS (data) == 0)
 402     grub_strcpy (symlink, (char *) INODE (data, symlink));
 403   else
 404     {
 405       grub_disk_read (data->disk,
 406                       (INODE_DIRBLOCKS (data, 0)
 407                        << grub_le_to_cpu32 (data->sblock.log2_blksz)),
 408                       0, INODE_SIZE (data), symlink);
 409       symlink[INODE_SIZE (data)] = '\0';
 410     }
 411
 412   /* The symlink is an absolute path, go back to the root inode.  */
 413   if (symlink[0] == '/')
 414     ino = GRUB_UFS_INODE;
 415
 416   /* Now load in the old inode.  */
 417   if (grub_ufs_read_inode (data, ino, 0))
 418     return grub_errno;
 419
 420   grub_ufs_find_file (data, symlink);
 421   if (grub_errno)
 422     grub_error (grub_errno, "Can not follow symlink `%s'.", symlink);
 423
 424   return grub_errno;
 425 }
 426
 427
 428 /* Find the file with the pathname PATH on the filesystem described by
 429    DATA.  */
 430 static grub_err_t
 431 grub_ufs_find_file (struct grub_ufs_data *data, const char *path)
 432 {
 433   char fpath[grub_strlen (path) + 1];
 434   char *name = fpath;
 435   char *next;
 436   unsigned int pos = 0;
 437   int dirino;
 438
 439   grub_strcpy (fpath, path);
 440
 441   /* Skip the first slash.  */
 442   if (name[0] == '/')
 443     {
 444       name++;
 445       if (!*name)
 446         return 0;
 447     }
 448
 449   /* Extract the actual part from the pathname.  */
 450   next = grub_strchr (name, '/');
 451   if (next)
 452     {
 453       next[0] = '\0';
 454       next++;
 455     }
 456
 457   do
 458     {
 459       struct grub_ufs_dirent dirent;
 460       int namelen;
 461
 462       if (grub_strlen (name) == 0)
 463         return GRUB_ERR_NONE;
 464
 465       if (grub_ufs_read_file (data, 0, pos, sizeof (dirent),
 466                               (char *) &dirent) < 0)
 467         return grub_errno;
 468
 469       namelen = (data->ufs_type == UFS2)
 470         ? dirent.namelen_bsd : grub_le_to_cpu16 (dirent.namelen);
 471
 472       {
 473         char filename[namelen + 1];
 474
 475         if (grub_ufs_read_file (data, 0, pos + sizeof (dirent),
 476                                 namelen, filename) < 0)
 477           return grub_errno;
 478
 479         filename[namelen] = '\0';
 480
 481         if (!grub_strcmp (name, filename))
 482           {
 483             dirino = data->ino;
 484             grub_ufs_read_inode (data, grub_le_to_cpu32 (dirent.ino), 0);
 485
 486             if ((INODE_MODE(data) & GRUB_UFS_ATTR_TYPE)
 487                 == GRUB_UFS_ATTR_LNK)
 488               {
 489                 grub_ufs_lookup_symlink (data, dirino);
 490                 if (grub_errno)
 491                   return grub_errno;
 492               }
 493
 494             if (!next)
 495               return 0;
 496
 497             pos = 0;
 498
 499             name = next;
 500             next = grub_strchr (name, '/');
 501             if (next)
 502               {
 503                 next[0] = '\0';
 504                 next++;
 505               }
 506
 507             if ((INODE_MODE(data) & GRUB_UFS_ATTR_TYPE) != GRUB_UFS_ATTR_DIR)
 508               return grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a directory");
 509
 510             continue;
 511           }
 512       }
 513
 514       pos += grub_le_to_cpu16 (dirent.direntlen);
 515     } while (pos < INODE_SIZE (data));
 516
 517   grub_error (GRUB_ERR_FILE_NOT_FOUND, "file not found");
 518   return grub_errno;
 519 }
 520
 521
 522 /* Mount the filesystem on the disk DISK.  */
 523 static struct grub_ufs_data *
 524 grub_ufs_mount (grub_disk_t disk)
 525 {
 526   struct grub_ufs_data *data;
 527   int *sblklist = sblocklist;
 528
 529   data = grub_malloc (sizeof (struct grub_ufs_data));
 530   if (!data)
 531     return 0;
 532
 533   /* Find a UFS1 or UFS2 sblock.  */
 534   data->ufs_type = UNKNOWN;
 535   while (*sblklist != -1)
 536     {
 537       grub_disk_read (disk, *sblklist, 0, sizeof (struct grub_ufs_sblock),
 538                       &data->sblock);
 539       if (grub_errno)
 540         goto fail;
 541
 542       if (grub_le_to_cpu32 (data->sblock.magic) == GRUB_UFS_MAGIC)
 543         {
 544           data->ufs_type = UFS1;
 545           break;
 546         }
 547       else if (grub_le_to_cpu32 (data->sblock.magic) == GRUB_UFS2_MAGIC)
 548         {
 549           data->ufs_type = UFS2;
 550           break;
 551         }
 552       sblklist++;
 553     }
 554   if (data->ufs_type == UNKNOWN)
 555     {
 556       grub_error (GRUB_ERR_BAD_FS, "not an ufs filesystem");
 557       goto fail;
 558     }
 559
 560   data->disk = disk;
 561   data->linknest = 0;
 562   return data;
 563
 564  fail:
 565   grub_free (data);
 566
 567   if (grub_errno == GRUB_ERR_OUT_OF_RANGE)
 568     grub_error (GRUB_ERR_BAD_FS, "not a ufs filesystem");
 569
 570   return 0;
 571 }
 572
 573
 574 static grub_err_t
 575 grub_ufs_dir (grub_device_t device, const char *path,
 576                int (*hook) (const char *filename,
 577                             const struct grub_dirhook_info *info))
 578 {
 579   struct grub_ufs_data *data;
 580   struct grub_ufs_sblock *sblock;
 581   unsigned int pos = 0;
 582
 583   data = grub_ufs_mount (device->disk);
 584   if (!data)
 585     return grub_errno;
 586
 587   grub_ufs_read_inode (data, GRUB_UFS_INODE, 0);
 588   if (grub_errno)
 589     return grub_errno;
 590
 591   sblock = &data->sblock;
 592
 593   if (!path || path[0] != '/')
 594     {
 595       grub_error (GRUB_ERR_BAD_FILENAME, "bad filename");
 596       return grub_errno;
 597     }
 598
 599   grub_ufs_find_file (data, path);
 600   if (grub_errno)
 601     goto fail;
 602
 603   if ((INODE_MODE (data) & GRUB_UFS_ATTR_TYPE) != GRUB_UFS_ATTR_DIR)
 604     {
 605       grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a directory");
 606       goto fail;
 607     }
 608
 609   while (pos < INODE_SIZE (data))
 610     {
 611       struct grub_ufs_dirent dirent;
 612       int namelen;
 613
 614       if (grub_ufs_read_file (data, 0, pos, sizeof (dirent),
 615                               (char *) &dirent) < 0)
 616         break;
 617
 618       namelen = (data->ufs_type == UFS2)
 619         ? dirent.namelen_bsd : grub_le_to_cpu16 (dirent.namelen);
 620
 621       {
 622         char filename[namelen + 1];
 623         struct grub_dirhook_info info;
 624         grub_memset (&info, 0, sizeof (info));
 625
 626         if (grub_ufs_read_file (data, 0, pos + sizeof (dirent),
 627                                 namelen, filename) < 0)
 628           break;
 629
 630         filename[namelen] = '\0';
 631         if (data->ufs_type == UFS1)
 632           {
 633             struct grub_ufs_inode inode;
 634             grub_ufs_read_inode (data, dirent.ino, (char *) &inode);
 635             info.dir = ((grub_le_to_cpu16 (inode.mode) & GRUB_UFS_ATTR_TYPE)
 636                         == GRUB_UFS_ATTR_DIR);
 637             info.mtime = grub_le_to_cpu64 (inode.mtime);
 638             info.mtimeset = 1;
 639           }
 640         else
 641           {
 642             struct grub_ufs2_inode inode;
 643             grub_ufs_read_inode (data, dirent.ino, (char *) &inode);
 644             info.dir = ((grub_le_to_cpu16 (inode.mode) & GRUB_UFS_ATTR_TYPE)
 645                         == GRUB_UFS_ATTR_DIR);
 646             info.mtime = grub_le_to_cpu64 (inode.mtime);
 647             info.mtimeset = 1;
 648           }
 649
 650         if (hook (filename, &info))
 651           break;
 652       }
 653
 654       pos += grub_le_to_cpu16 (dirent.direntlen);
 655     }
 656
 657  fail:
 658   grub_free (data);
 659
 660   return grub_errno;
 661 }
 662
 663
 664 /* Open a file named NAME and initialize FILE.  */
 665 static grub_err_t
 666 grub_ufs_open (struct grub_file *file, const char *name)
 667 {
 668   struct grub_ufs_data *data;
 669   data = grub_ufs_mount (file->device->disk);
 670   if (!data)
 671     return grub_errno;
 672
 673   grub_ufs_read_inode (data, 2, 0);
 674   if (grub_errno)
 675     {
 676       grub_free (data);
 677       return grub_errno;
 678     }
 679
 680   if (!name || name[0] != '/')
 681     {
 682       grub_error (GRUB_ERR_BAD_FILENAME, "bad filename");
 683       return grub_errno;
 684     }
 685
 686   grub_ufs_find_file (data, name);
 687   if (grub_errno)
 688     {
 689       grub_free (data);
 690       return grub_errno;
 691     }
 692
 693   file->data = data;
 694   file->size = INODE_SIZE (data);
 695
 696   return GRUB_ERR_NONE;
 697 }
 698
 699
 700 static grub_ssize_t
 701 grub_ufs_read (grub_file_t file, char *buf, grub_size_t len)
 702 {
 703   struct grub_ufs_data *data =
 704     (struct grub_ufs_data *) file->data;
 705
 706   return grub_ufs_read_file (data, file->read_hook, file->offset, len, buf);
 707 }
 708
 709
 710 static grub_err_t
 711 grub_ufs_close (grub_file_t file)
 712 {
 713   grub_free (file->data);
 714
 715   return GRUB_ERR_NONE;
 716 }
 717
 718
 719 static grub_err_t
 720 grub_ufs_label (grub_device_t device, char **label)
 721 {
 722   struct grub_ufs_data *data = 0;
 723
 724   grub_dl_ref (my_mod);
 725
 726   *label = 0;
 727
 728   data = grub_ufs_mount (device->disk);
 729   if (data)
 730     {
 731       if (data->ufs_type == UFS2)
 732         *label = grub_strdup ((char *) data->sblock.volume_name);
 733     }
 734
 735   grub_dl_unref (my_mod);
 736
 737   grub_free (data);
 738
 739   return grub_errno;
 740 }
 741
 742 static grub_err_t
 743 grub_ufs_uuid (grub_device_t device, char **uuid)
 744 {
 745   struct grub_ufs_data *data;
 746   grub_disk_t disk = device->disk;
 747
 748   grub_dl_ref (my_mod);
 749
 750   data = grub_ufs_mount (disk);
 751   if (data)
 752     {
 753       *uuid = grub_malloc (16 + sizeof ('\0'));
 754       grub_sprintf (*uuid, "%08x%08x",
 755                     (unsigned) grub_le_to_cpu32 (data->sblock.uuidhi),
 756                     (unsigned) grub_le_to_cpu32 (data->sblock.uuidlow));
 757     }
 758   else
 759     *uuid = NULL;
 760
 761   grub_dl_unref (my_mod);
 762
 763   grub_free (data);
 764
 765   return grub_errno;
 766 }
 767
 768
 769 /* Get mtime.  */
 770 static grub_err_t
 771 grub_ufs_mtime (grub_device_t device, grub_int32_t *tm)
 772 {
 773   struct grub_ufs_data *data = 0;
 774
 775   grub_dl_ref (my_mod);
 776
 777   data = grub_ufs_mount (device->disk);
 778   if (!data)
 779     *tm = 0;
 780   else if (data->ufs_type == UFS1)
 781     *tm = grub_le_to_cpu32 (data->sblock.mtime);
 782   else
 783     *tm = grub_le_to_cpu64 (data->sblock.mtime2);
 784
 785   grub_dl_unref (my_mod);
 786
 787   grub_free (data);
 788
 789   return grub_errno;
 790 }
 791
 792
 793 \f
 794 static struct grub_fs grub_ufs_fs =
 795   {
 796     .name = "ufs",
 797     .dir = grub_ufs_dir,
 798     .open = grub_ufs_open,
 799     .read = grub_ufs_read,
 800     .close = grub_ufs_close,
 801     .label = grub_ufs_label,
 802     .uuid = grub_ufs_uuid,
 803     .mtime = grub_ufs_mtime,
 804     .next = 0
 805   };
 806
 807 GRUB_MOD_INIT(ufs)
 808 {
 809   grub_fs_register (&grub_ufs_fs);
 810   my_mod = mod;
 811 }
 812
 813 GRUB_MOD_FINI(ufs)
 814 {
 815   grub_fs_unregister (&grub_ufs_fs);
 816 }
 817