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