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