fs/qnx4/inode.c

   1 /*
   2  * QNX4 file system, Linux implementation.
   3  *
   4  * Version : 0.2.1
   5  *
   6  * Using parts of the xiafs filesystem.
   7  *
   8  * History :
   9  *
  10  * 01-06-1998 by Richard Frowijn : first release.
  11  * 20-06-1998 by Frank Denis : Linux 2.1.99+ support, boot signature, misc.
  12  * 30-06-1998 by Frank Denis : first step to write inodes.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/types.h>
  17 #include <linux/string.h>
  18 #include <linux/errno.h>
  19 #include <linux/slab.h>
  20 #include <linux/fs.h>
  21 #include <linux/qnx4_fs.h>
  22 #include <linux/init.h>
  23 #include <linux/highuid.h>
  24 #include <linux/smp_lock.h>
  25 #include <linux/pagemap.h>
  26 #include <linux/buffer_head.h>
  27 #include <linux/vfs.h>
  28 #include <asm/uaccess.h>
  29
  30 #define QNX4_VERSION  4
  31 #define QNX4_BMNAME   ".bitmap"
  32
  33 static const struct super_operations qnx4_sops;
  34
  35 #ifdef CONFIG_QNX4FS_RW
  36
  37 int qnx4_sync_inode(struct inode *inode)
  38 {
  39         int err = 0;
  40 # if 0
  41         struct buffer_head *bh;
  42
  43         bh = qnx4_update_inode(inode);
  44         if (bh && buffer_dirty(bh))
  45         {
  46                 sync_dirty_buffer(bh);
  47                 if (buffer_req(bh) && !buffer_uptodate(bh))
  48                 {
  49                         printk ("IO error syncing qnx4 inode [%s:%08lx]\n",
  50                                 inode->i_sb->s_id, inode->i_ino);
  51                         err = -1;
  52                 }
  53                 brelse (bh);
  54         } else if (!bh) {
  55                 err = -1;
  56         }
  57 # endif
  58
  59         return err;
  60 }
  61
  62 static void qnx4_delete_inode(struct inode *inode)
  63 {
  64         QNX4DEBUG(("qnx4: deleting inode [%lu]\n", (unsigned long) inode->i_ino));
  65         truncate_inode_pages(&inode->i_data, 0);
  66         inode->i_size = 0;
  67         qnx4_truncate(inode);
  68         lock_kernel();
  69         qnx4_free_inode(inode);
  70         unlock_kernel();
  71 }
  72
  73 static int qnx4_write_inode(struct inode *inode, int unused)
  74 {
  75         struct qnx4_inode_entry *raw_inode;
  76         int block, ino;
  77         struct buffer_head *bh;
  78         ino = inode->i_ino;
  79
  80         QNX4DEBUG(("qnx4: write inode 1.\n"));
  81         if (inode->i_nlink == 0) {
  82                 return 0;
  83         }
  84         if (!ino) {
  85                 printk("qnx4: bad inode number on dev %s: %d is out of range\n",
  86                        inode->i_sb->s_id, ino);
  87                 return -EIO;
  88         }
  89         QNX4DEBUG(("qnx4: write inode 2.\n"));
  90         block = ino / QNX4_INODES_PER_BLOCK;
  91         lock_kernel();
  92         if (!(bh = sb_bread(inode->i_sb, block))) {
  93                 printk("qnx4: major problem: unable to read inode from dev "
  94                        "%s\n", inode->i_sb->s_id);
  95                 unlock_kernel();
  96                 return -EIO;
  97         }
  98         raw_inode = ((struct qnx4_inode_entry *) bh->b_data) +
  99             (ino % QNX4_INODES_PER_BLOCK);
 100         raw_inode->di_mode  = cpu_to_le16(inode->i_mode);
 101         raw_inode->di_uid   = cpu_to_le16(fs_high2lowuid(inode->i_uid));
 102         raw_inode->di_gid   = cpu_to_le16(fs_high2lowgid(inode->i_gid));
 103         raw_inode->di_nlink = cpu_to_le16(inode->i_nlink);
 104         raw_inode->di_size  = cpu_to_le32(inode->i_size);
 105         raw_inode->di_mtime = cpu_to_le32(inode->i_mtime.tv_sec);
 106         raw_inode->di_atime = cpu_to_le32(inode->i_atime.tv_sec);
 107         raw_inode->di_ctime = cpu_to_le32(inode->i_ctime.tv_sec);
 108         raw_inode->di_first_xtnt.xtnt_size = cpu_to_le32(inode->i_blocks);
 109         mark_buffer_dirty(bh);
 110         brelse(bh);
 111         unlock_kernel();
 112         return 0;
 113 }
 114
 115 #endif
 116
 117 static void qnx4_put_super(struct super_block *sb);
 118 static struct inode *qnx4_alloc_inode(struct super_block *sb);
 119 static void qnx4_destroy_inode(struct inode *inode);
 120 static int qnx4_remount(struct super_block *sb, int *flags, char *data);
 121 static int qnx4_statfs(struct dentry *, struct kstatfs *);
 122
 123 static const struct super_operations qnx4_sops =
 124 {
 125         .alloc_inode    = qnx4_alloc_inode,
 126         .destroy_inode  = qnx4_destroy_inode,
 127         .put_super      = qnx4_put_super,
 128         .statfs         = qnx4_statfs,
 129         .remount_fs     = qnx4_remount,
 130 #ifdef CONFIG_QNX4FS_RW
 131         .write_inode    = qnx4_write_inode,
 132         .delete_inode   = qnx4_delete_inode,
 133 #endif
 134 };
 135
 136 static int qnx4_remount(struct super_block *sb, int *flags, char *data)
 137 {
 138         struct qnx4_sb_info *qs;
 139
 140         qs = qnx4_sb(sb);
 141         qs->Version = QNX4_VERSION;
 142 #ifndef CONFIG_QNX4FS_RW
 143         *flags |= MS_RDONLY;
 144 #endif
 145         if (*flags & MS_RDONLY) {
 146                 return 0;
 147         }
 148
 149         mark_buffer_dirty(qs->sb_buf);
 150
 151         return 0;
 152 }
 153
 154 static struct buffer_head *qnx4_getblk(struct inode *inode, int nr,
 155                                        int create)
 156 {
 157         struct buffer_head *result = NULL;
 158
 159         if ( nr >= 0 )
 160                 nr = qnx4_block_map( inode, nr );
 161         if (nr) {
 162                 result = sb_getblk(inode->i_sb, nr);
 163                 return result;
 164         }
 165         if (!create) {
 166                 return NULL;
 167         }
 168 #if 0
 169         tmp = qnx4_new_block(inode->i_sb);
 170         if (!tmp) {
 171                 return NULL;
 172         }
 173         result = sb_getblk(inode->i_sb, tmp);
 174         if (tst) {
 175                 qnx4_free_block(inode->i_sb, tmp);
 176                 brelse(result);
 177                 goto repeat;
 178         }
 179         tst = tmp;
 180 #endif
 181         inode->i_ctime = CURRENT_TIME_SEC;
 182         mark_inode_dirty(inode);
 183         return result;
 184 }
 185
 186 struct buffer_head *qnx4_bread(struct inode *inode, int block, int create)
 187 {
 188         struct buffer_head *bh;
 189
 190         bh = qnx4_getblk(inode, block, create);
 191         if (!bh || buffer_uptodate(bh)) {
 192                 return bh;
 193         }
 194         ll_rw_block(READ, 1, &bh);
 195         wait_on_buffer(bh);
 196         if (buffer_uptodate(bh)) {
 197                 return bh;
 198         }
 199         brelse(bh);
 200
 201         return NULL;
 202 }
 203
 204 static int qnx4_get_block( struct inode *inode, sector_t iblock, struct buffer_head *bh, int create )
 205 {
 206         unsigned long phys;
 207
 208         QNX4DEBUG(("qnx4: qnx4_get_block inode=[%ld] iblock=[%ld]\n",inode->i_ino,iblock));
 209
 210         phys = qnx4_block_map( inode, iblock );
 211         if ( phys ) {
 212                 // logical block is before EOF
 213                 map_bh(bh, inode->i_sb, phys);
 214         } else if ( create ) {
 215                 // to be done.
 216         }
 217         return 0;
 218 }
 219
 220 unsigned long qnx4_block_map( struct inode *inode, long iblock )
 221 {
 222         int ix;
 223         long offset, i_xblk;
 224         unsigned long block = 0;
 225         struct buffer_head *bh = NULL;
 226         struct qnx4_xblk *xblk = NULL;
 227         struct qnx4_inode_entry *qnx4_inode = qnx4_raw_inode(inode);
 228         u16 nxtnt = le16_to_cpu(qnx4_inode->di_num_xtnts);
 229
 230         if ( iblock < le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_size) ) {
 231                 // iblock is in the first extent. This is easy.
 232                 block = le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_blk) + iblock - 1;
 233         } else {
 234                 // iblock is beyond first extent. We have to follow the extent chain.
 235                 i_xblk = le32_to_cpu(qnx4_inode->di_xblk);
 236                 offset = iblock - le32_to_cpu(qnx4_inode->di_first_xtnt.xtnt_size);
 237                 ix = 0;
 238                 while ( --nxtnt > 0 ) {
 239                         if ( ix == 0 ) {
 240                                 // read next xtnt block.
 241                                 bh = sb_bread(inode->i_sb, i_xblk - 1);
 242                                 if ( !bh ) {
 243                                         QNX4DEBUG(("qnx4: I/O error reading xtnt block [%ld])\n", i_xblk - 1));
 244                                         return -EIO;
 245                                 }
 246                                 xblk = (struct qnx4_xblk*)bh->b_data;
 247                                 if ( memcmp( xblk->xblk_signature, "IamXblk", 7 ) ) {
 248                                         QNX4DEBUG(("qnx4: block at %ld is not a valid xtnt\n", qnx4_inode->i_xblk));
 249                                         return -EIO;
 250                                 }
 251                         }
 252                         if ( offset < le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_size) ) {
 253                                 // got it!
 254                                 block = le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_blk) + offset - 1;
 255                                 break;
 256                         }
 257                         offset -= le32_to_cpu(xblk->xblk_xtnts[ix].xtnt_size);
 258                         if ( ++ix >= xblk->xblk_num_xtnts ) {
 259                                 i_xblk = le32_to_cpu(xblk->xblk_next_xblk);
 260                                 ix = 0;
 261                                 brelse( bh );
 262                                 bh = NULL;
 263                         }
 264                 }
 265                 if ( bh )
 266                         brelse( bh );
 267         }
 268
 269         QNX4DEBUG(("qnx4: mapping block %ld of inode %ld = %ld\n",iblock,inode->i_ino,block));
 270         return block;
 271 }
 272
 273 static int qnx4_statfs(struct dentry *dentry, struct kstatfs *buf)
 274 {
 275         struct super_block *sb = dentry->d_sb;
 276         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
 277
 278         lock_kernel();
 279
 280         buf->f_type    = sb->s_magic;
 281         buf->f_bsize   = sb->s_blocksize;
 282         buf->f_blocks  = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size) * 8;
 283         buf->f_bfree   = qnx4_count_free_blocks(sb);
 284         buf->f_bavail  = buf->f_bfree;
 285         buf->f_namelen = QNX4_NAME_MAX;
 286         buf->f_fsid.val[0] = (u32)id;
 287         buf->f_fsid.val[1] = (u32)(id >> 32);
 288
 289         unlock_kernel();
 290
 291         return 0;
 292 }
 293
 294 /*
 295  * Check the root directory of the filesystem to make sure
 296  * it really _is_ a qnx4 filesystem, and to check the size
 297  * of the directory entry.
 298  */
 299 static const char *qnx4_checkroot(struct super_block *sb)
 300 {
 301         struct buffer_head *bh;
 302         struct qnx4_inode_entry *rootdir;
 303         int rd, rl;
 304         int i, j;
 305         int found = 0;
 306
 307         if (*(qnx4_sb(sb)->sb->RootDir.di_fname) != '/') {
 308                 return "no qnx4 filesystem (no root dir).";
 309         } else {
 310                 QNX4DEBUG(("QNX4 filesystem found on dev %s.\n", sb->s_id));
 311                 rd = le32_to_cpu(qnx4_sb(sb)->sb->RootDir.di_first_xtnt.xtnt_blk) - 1;
 312                 rl = le32_to_cpu(qnx4_sb(sb)->sb->RootDir.di_first_xtnt.xtnt_size);
 313                 for (j = 0; j < rl; j++) {
 314                         bh = sb_bread(sb, rd + j);      /* root dir, first block */
 315                         if (bh == NULL) {
 316                                 return "unable to read root entry.";
 317                         }
 318                         for (i = 0; i < QNX4_INODES_PER_BLOCK; i++) {
 319                                 rootdir = (struct qnx4_inode_entry *) (bh->b_data + i * QNX4_DIR_ENTRY_SIZE);
 320                                 if (rootdir->di_fname != NULL) {
 321                                         QNX4DEBUG(("Rootdir entry found : [%s]\n", rootdir->di_fname));
 322                                         if (!strncmp(rootdir->di_fname, QNX4_BMNAME, sizeof QNX4_BMNAME)) {
 323                                                 found = 1;
 324                                                 qnx4_sb(sb)->BitMap = kmalloc( sizeof( struct qnx4_inode_entry ), GFP_KERNEL );
 325                                                 if (!qnx4_sb(sb)->BitMap) {
 326                                                         brelse (bh);
 327                                                         return "not enough memory for bitmap inode";
 328                                                 }
 329                                                 memcpy( qnx4_sb(sb)->BitMap, rootdir, sizeof( struct qnx4_inode_entry ) );      /* keep bitmap inode known */
 330                                                 break;
 331                                         }
 332                                 }
 333                         }
 334                         brelse(bh);
 335                         if (found != 0) {
 336                                 break;
 337                         }
 338                 }
 339                 if (found == 0) {
 340                         return "bitmap file not found.";
 341                 }
 342         }
 343         return NULL;
 344 }
 345
 346 static int qnx4_fill_super(struct super_block *s, void *data, int silent)
 347 {
 348         struct buffer_head *bh;
 349         struct inode *root;
 350         const char *errmsg;
 351         struct qnx4_sb_info *qs;
 352         int ret = -EINVAL;
 353
 354         qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL);
 355         if (!qs)
 356                 return -ENOMEM;
 357         s->s_fs_info = qs;
 358
 359         sb_set_blocksize(s, QNX4_BLOCK_SIZE);
 360
 361         /* Check the superblock signature. Since the qnx4 code is
 362            dangerous, we should leave as quickly as possible
 363            if we don't belong here... */
 364         bh = sb_bread(s, 1);
 365         if (!bh) {
 366                 printk("qnx4: unable to read the superblock\n");
 367                 goto outnobh;
 368         }
 369         if ( le32_to_cpup((__le32*) bh->b_data) != QNX4_SUPER_MAGIC ) {
 370                 if (!silent)
 371                         printk("qnx4: wrong fsid in superblock.\n");
 372                 goto out;
 373         }
 374         s->s_op = &qnx4_sops;
 375         s->s_magic = QNX4_SUPER_MAGIC;
 376 #ifndef CONFIG_QNX4FS_RW
 377         s->s_flags |= MS_RDONLY;        /* Yup, read-only yet */
 378 #endif
 379         qnx4_sb(s)->sb_buf = bh;
 380         qnx4_sb(s)->sb = (struct qnx4_super_block *) bh->b_data;
 381
 382
 383         /* check before allocating dentries, inodes, .. */
 384         errmsg = qnx4_checkroot(s);
 385         if (errmsg != NULL) {
 386                 if (!silent)
 387                         printk("qnx4: %s\n", errmsg);
 388                 goto out;
 389         }
 390
 391         /* does root not have inode number QNX4_ROOT_INO ?? */
 392         root = qnx4_iget(s, QNX4_ROOT_INO * QNX4_INODES_PER_BLOCK);
 393         if (IS_ERR(root)) {
 394                 printk("qnx4: get inode failed\n");
 395                 ret = PTR_ERR(root);
 396                 goto out;
 397         }
 398
 399         ret = -ENOMEM;
 400         s->s_root = d_alloc_root(root);
 401         if (s->s_root == NULL)
 402                 goto outi;
 403
 404         brelse(bh);
 405
 406         return 0;
 407
 408       outi:
 409         iput(root);
 410       out:
 411         brelse(bh);
 412       outnobh:
 413         kfree(qs);
 414         s->s_fs_info = NULL;
 415         return ret;
 416 }
 417
 418 static void qnx4_put_super(struct super_block *sb)
 419 {
 420         struct qnx4_sb_info *qs = qnx4_sb(sb);
 421         kfree( qs->BitMap );
 422         kfree( qs );
 423         sb->s_fs_info = NULL;
 424         return;
 425 }
 426
 427 static int qnx4_writepage(struct page *page, struct writeback_control *wbc)
 428 {
 429         return block_write_full_page(page,qnx4_get_block, wbc);
 430 }
 431
 432 static int qnx4_readpage(struct file *file, struct page *page)
 433 {
 434         return block_read_full_page(page,qnx4_get_block);
 435 }
 436
 437 static int qnx4_write_begin(struct file *file, struct address_space *mapping,
 438                         loff_t pos, unsigned len, unsigned flags,
 439                         struct page **pagep, void **fsdata)
 440 {
 441         struct qnx4_inode_info *qnx4_inode = qnx4_i(mapping->host);
 442         *pagep = NULL;
 443         return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
 444                                 qnx4_get_block,
 445                                 &qnx4_inode->mmu_private);
 446 }
 447 static sector_t qnx4_bmap(struct address_space *mapping, sector_t block)
 448 {
 449         return generic_block_bmap(mapping,block,qnx4_get_block);
 450 }
 451 static const struct address_space_operations qnx4_aops = {
 452         .readpage       = qnx4_readpage,
 453         .writepage      = qnx4_writepage,
 454         .sync_page      = block_sync_page,
 455         .write_begin    = qnx4_write_begin,
 456         .write_end      = generic_write_end,
 457         .bmap           = qnx4_bmap
 458 };
 459
 460 struct inode *qnx4_iget(struct super_block *sb, unsigned long ino)
 461 {
 462         struct buffer_head *bh;
 463         struct qnx4_inode_entry *raw_inode;
 464         int block;
 465         struct qnx4_inode_entry *qnx4_inode;
 466         struct inode *inode;
 467
 468         inode = iget_locked(sb, ino);
 469         if (!inode)
 470                 return ERR_PTR(-ENOMEM);
 471         if (!(inode->i_state & I_NEW))
 472                 return inode;
 473
 474         qnx4_inode = qnx4_raw_inode(inode);
 475         inode->i_mode = 0;
 476
 477         QNX4DEBUG(("Reading inode : [%d]\n", ino));
 478         if (!ino) {
 479                 printk(KERN_ERR "qnx4: bad inode number on dev %s: %lu is "
 480                                 "out of range\n",
 481                        sb->s_id, ino);
 482                 iget_failed(inode);
 483                 return ERR_PTR(-EIO);
 484         }
 485         block = ino / QNX4_INODES_PER_BLOCK;
 486
 487         if (!(bh = sb_bread(sb, block))) {
 488                 printk("qnx4: major problem: unable to read inode from dev "
 489                        "%s\n", sb->s_id);
 490                 iget_failed(inode);
 491                 return ERR_PTR(-EIO);
 492         }
 493         raw_inode = ((struct qnx4_inode_entry *) bh->b_data) +
 494             (ino % QNX4_INODES_PER_BLOCK);
 495
 496         inode->i_mode    = le16_to_cpu(raw_inode->di_mode);
 497         inode->i_uid     = (uid_t)le16_to_cpu(raw_inode->di_uid);
 498         inode->i_gid     = (gid_t)le16_to_cpu(raw_inode->di_gid);
 499         inode->i_nlink   = le16_to_cpu(raw_inode->di_nlink);
 500         inode->i_size    = le32_to_cpu(raw_inode->di_size);
 501         inode->i_mtime.tv_sec   = le32_to_cpu(raw_inode->di_mtime);
 502         inode->i_mtime.tv_nsec = 0;
 503         inode->i_atime.tv_sec   = le32_to_cpu(raw_inode->di_atime);
 504         inode->i_atime.tv_nsec = 0;
 505         inode->i_ctime.tv_sec   = le32_to_cpu(raw_inode->di_ctime);
 506         inode->i_ctime.tv_nsec = 0;
 507         inode->i_blocks  = le32_to_cpu(raw_inode->di_first_xtnt.xtnt_size);
 508
 509         memcpy(qnx4_inode, raw_inode, QNX4_DIR_ENTRY_SIZE);
 510         if (S_ISREG(inode->i_mode)) {
 511                 inode->i_op = &qnx4_file_inode_operations;
 512                 inode->i_fop = &qnx4_file_operations;
 513                 inode->i_mapping->a_ops = &qnx4_aops;
 514                 qnx4_i(inode)->mmu_private = inode->i_size;
 515         } else if (S_ISDIR(inode->i_mode)) {
 516                 inode->i_op = &qnx4_dir_inode_operations;
 517                 inode->i_fop = &qnx4_dir_operations;
 518         } else if (S_ISLNK(inode->i_mode)) {
 519                 inode->i_op = &page_symlink_inode_operations;
 520                 inode->i_mapping->a_ops = &qnx4_aops;
 521                 qnx4_i(inode)->mmu_private = inode->i_size;
 522         } else {
 523                 printk(KERN_ERR "qnx4: bad inode %lu on dev %s\n",
 524                         ino, sb->s_id);
 525                 iget_failed(inode);
 526                 brelse(bh);
 527                 return ERR_PTR(-EIO);
 528         }
 529         brelse(bh);
 530         unlock_new_inode(inode);
 531         return inode;
 532 }
 533
 534 static struct kmem_cache *qnx4_inode_cachep;
 535
 536 static struct inode *qnx4_alloc_inode(struct super_block *sb)
 537 {
 538         struct qnx4_inode_info *ei;
 539         ei = kmem_cache_alloc(qnx4_inode_cachep, GFP_KERNEL);
 540         if (!ei)
 541                 return NULL;
 542         return &ei->vfs_inode;
 543 }
 544
 545 static void qnx4_destroy_inode(struct inode *inode)
 546 {
 547         kmem_cache_free(qnx4_inode_cachep, qnx4_i(inode));
 548 }
 549
 550 static void init_once(void *foo)
 551 {
 552         struct qnx4_inode_info *ei = (struct qnx4_inode_info *) foo;
 553
 554         inode_init_once(&ei->vfs_inode);
 555 }
 556
 557 static int init_inodecache(void)
 558 {
 559         qnx4_inode_cachep = kmem_cache_create("qnx4_inode_cache",
 560                                              sizeof(struct qnx4_inode_info),
 561                                              0, (SLAB_RECLAIM_ACCOUNT|
 562                                                 SLAB_MEM_SPREAD),
 563                                              init_once);
 564         if (qnx4_inode_cachep == NULL)
 565                 return -ENOMEM;
 566         return 0;
 567 }
 568
 569 static void destroy_inodecache(void)
 570 {
 571         kmem_cache_destroy(qnx4_inode_cachep);
 572 }
 573
 574 static int qnx4_get_sb(struct file_system_type *fs_type,
 575         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
 576 {
 577         return get_sb_bdev(fs_type, flags, dev_name, data, qnx4_fill_super,
 578                            mnt);
 579 }
 580
 581 static struct file_system_type qnx4_fs_type = {
 582         .owner          = THIS_MODULE,
 583         .name           = "qnx4",
 584         .get_sb         = qnx4_get_sb,
 585         .kill_sb        = kill_block_super,
 586         .fs_flags       = FS_REQUIRES_DEV,
 587 };
 588
 589 static int __init init_qnx4_fs(void)
 590 {
 591         int err;
 592
 593         err = init_inodecache();
 594         if (err)
 595                 return err;
 596
 597         err = register_filesystem(&qnx4_fs_type);
 598         if (err) {
 599                 destroy_inodecache();
 600                 return err;
 601         }
 602
 603         printk("QNX4 filesystem 0.2.3 registered.\n");
 604         return 0;
 605 }
 606
 607 static void __exit exit_qnx4_fs(void)
 608 {
 609         unregister_filesystem(&qnx4_fs_type);
 610         destroy_inodecache();
 611 }
 612
 613 module_init(init_qnx4_fs)
 614 module_exit(exit_qnx4_fs)
 615 MODULE_LICENSE("GPL");
 616