1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * QNX6 file system, Linux implementation. 4 * 5 * Version : 1.0.0 6 * 7 * History : 8 * 9 * 01-02-2012 by Kai Bankett (chaosman@ontika.net) : first release. 10 * 16-02-2012 pagemap extension by Al Viro 11 * 12 */ 13 14 #include <linux/module.h> 15 #include <linux/init.h> 16 #include <linux/slab.h> 17 #include <linux/highuid.h> 18 #include <linux/pagemap.h> 19 #include <linux/buffer_head.h> 20 #include <linux/writeback.h> 21 #include <linux/statfs.h> 22 #include <linux/parser.h> 23 #include <linux/seq_file.h> 24 #include <linux/mount.h> 25 #include <linux/crc32.h> 26 #include <linux/mpage.h> 27 #include "qnx6.h" 28 29 static const struct super_operations qnx6_sops; 30 31 static void qnx6_put_super(struct super_block *sb); 32 static struct inode *qnx6_alloc_inode(struct super_block *sb); 33 static void qnx6_free_inode(struct inode *inode); 34 static int qnx6_remount(struct super_block *sb, int *flags, char *data); 35 static int qnx6_statfs(struct dentry *dentry, struct kstatfs *buf); 36 static int qnx6_show_options(struct seq_file *seq, struct dentry *root); 37 38 static const struct super_operations qnx6_sops = { 39 .alloc_inode = qnx6_alloc_inode, 40 .free_inode = qnx6_free_inode, 41 .put_super = qnx6_put_super, 42 .statfs = qnx6_statfs, 43 .remount_fs = qnx6_remount, 44 .show_options = qnx6_show_options, 45 }; 46 47 static int qnx6_show_options(struct seq_file *seq, struct dentry *root) 48 { 49 struct super_block *sb = root->d_sb; 50 struct qnx6_sb_info *sbi = QNX6_SB(sb); 51 52 if (sbi->s_mount_opt & QNX6_MOUNT_MMI_FS) 53 seq_puts(seq, ",mmi_fs"); 54 return 0; 55 } 56 57 static int qnx6_remount(struct super_block *sb, int *flags, char *data) 58 { 59 sync_filesystem(sb); 60 *flags |= SB_RDONLY; 61 return 0; 62 } 63 64 static unsigned qnx6_get_devblock(struct super_block *sb, __fs32 block) 65 { 66 struct qnx6_sb_info *sbi = QNX6_SB(sb); 67 return fs32_to_cpu(sbi, block) + sbi->s_blks_off; 68 } 69 70 static unsigned qnx6_block_map(struct inode *inode, unsigned iblock); 71 72 static int qnx6_get_block(struct inode *inode, sector_t iblock, 73 struct buffer_head *bh, int create) 74 { 75 unsigned phys; 76 77 pr_debug("qnx6_get_block inode=[%ld] iblock=[%ld]\n", 78 inode->i_ino, (unsigned long)iblock); 79 80 phys = qnx6_block_map(inode, iblock); 81 if (phys) { 82 /* logical block is before EOF */ 83 map_bh(bh, inode->i_sb, phys); 84 } 85 return 0; 86 } 87 88 static int qnx6_check_blockptr(__fs32 ptr) 89 { 90 if (ptr == ~(__fs32)0) { 91 pr_err("hit unused blockpointer.\n"); 92 return 0; 93 } 94 return 1; 95 } 96 97 static int qnx6_read_folio(struct file *file, struct folio *folio) 98 { 99 return mpage_read_folio(folio, qnx6_get_block); 100 } 101 102 static void qnx6_readahead(struct readahead_control *rac) 103 { 104 mpage_readahead(rac, qnx6_get_block); 105 } 106 107 /* 108 * returns the block number for the no-th element in the tree 109 * inodebits requred as there are multiple inodes in one inode block 110 */ 111 static unsigned qnx6_block_map(struct inode *inode, unsigned no) 112 { 113 struct super_block *s = inode->i_sb; 114 struct qnx6_sb_info *sbi = QNX6_SB(s); 115 struct qnx6_inode_info *ei = QNX6_I(inode); 116 unsigned block = 0; 117 struct buffer_head *bh; 118 __fs32 ptr; 119 int levelptr; 120 int ptrbits = sbi->s_ptrbits; 121 int bitdelta; 122 u32 mask = (1 << ptrbits) - 1; 123 int depth = ei->di_filelevels; 124 int i; 125 126 bitdelta = ptrbits * depth; 127 levelptr = no >> bitdelta; 128 129 if (levelptr > QNX6_NO_DIRECT_POINTERS - 1) { 130 pr_err("Requested file block number (%u) too big.", no); 131 return 0; 132 } 133 134 block = qnx6_get_devblock(s, ei->di_block_ptr[levelptr]); 135 136 for (i = 0; i < depth; i++) { 137 bh = sb_bread(s, block); 138 if (!bh) { 139 pr_err("Error reading block (%u)\n", block); 140 return 0; 141 } 142 bitdelta -= ptrbits; 143 levelptr = (no >> bitdelta) & mask; 144 ptr = ((__fs32 *)bh->b_data)[levelptr]; 145 146 if (!qnx6_check_blockptr(ptr)) 147 return 0; 148 149 block = qnx6_get_devblock(s, ptr); 150 brelse(bh); 151 } 152 return block; 153 } 154 155 static int qnx6_statfs(struct dentry *dentry, struct kstatfs *buf) 156 { 157 struct super_block *sb = dentry->d_sb; 158 struct qnx6_sb_info *sbi = QNX6_SB(sb); 159 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 160 161 buf->f_type = sb->s_magic; 162 buf->f_bsize = sb->s_blocksize; 163 buf->f_blocks = fs32_to_cpu(sbi, sbi->sb->sb_num_blocks); 164 buf->f_bfree = fs32_to_cpu(sbi, sbi->sb->sb_free_blocks); 165 buf->f_files = fs32_to_cpu(sbi, sbi->sb->sb_num_inodes); 166 buf->f_ffree = fs32_to_cpu(sbi, sbi->sb->sb_free_inodes); 167 buf->f_bavail = buf->f_bfree; 168 buf->f_namelen = QNX6_LONG_NAME_MAX; 169 buf->f_fsid = u64_to_fsid(id); 170 171 return 0; 172 } 173 174 /* 175 * Check the root directory of the filesystem to make sure 176 * it really _is_ a qnx6 filesystem, and to check the size 177 * of the directory entry. 178 */ 179 static const char *qnx6_checkroot(struct super_block *s) 180 { 181 static char match_root[2][3] = {".\0\0", "..\0"}; 182 int i, error = 0; 183 struct qnx6_dir_entry *dir_entry; 184 struct inode *root = d_inode(s->s_root); 185 struct address_space *mapping = root->i_mapping; 186 struct page *page = read_mapping_page(mapping, 0, NULL); 187 if (IS_ERR(page)) 188 return "error reading root directory"; 189 kmap(page); 190 dir_entry = page_address(page); 191 for (i = 0; i < 2; i++) { 192 /* maximum 3 bytes - due to match_root limitation */ 193 if (strncmp(dir_entry[i].de_fname, match_root[i], 3)) 194 error = 1; 195 } 196 qnx6_put_page(page); 197 if (error) 198 return "error reading root directory."; 199 return NULL; 200 } 201 202 #ifdef CONFIG_QNX6FS_DEBUG 203 void qnx6_superblock_debug(struct qnx6_super_block *sb, struct super_block *s) 204 { 205 struct qnx6_sb_info *sbi = QNX6_SB(s); 206 207 pr_debug("magic: %08x\n", fs32_to_cpu(sbi, sb->sb_magic)); 208 pr_debug("checksum: %08x\n", fs32_to_cpu(sbi, sb->sb_checksum)); 209 pr_debug("serial: %llx\n", fs64_to_cpu(sbi, sb->sb_serial)); 210 pr_debug("flags: %08x\n", fs32_to_cpu(sbi, sb->sb_flags)); 211 pr_debug("blocksize: %08x\n", fs32_to_cpu(sbi, sb->sb_blocksize)); 212 pr_debug("num_inodes: %08x\n", fs32_to_cpu(sbi, sb->sb_num_inodes)); 213 pr_debug("free_inodes: %08x\n", fs32_to_cpu(sbi, sb->sb_free_inodes)); 214 pr_debug("num_blocks: %08x\n", fs32_to_cpu(sbi, sb->sb_num_blocks)); 215 pr_debug("free_blocks: %08x\n", fs32_to_cpu(sbi, sb->sb_free_blocks)); 216 pr_debug("inode_levels: %02x\n", sb->Inode.levels); 217 } 218 #endif 219 220 enum { 221 Opt_mmifs, 222 Opt_err 223 }; 224 225 static const match_table_t tokens = { 226 {Opt_mmifs, "mmi_fs"}, 227 {Opt_err, NULL} 228 }; 229 230 static int qnx6_parse_options(char *options, struct super_block *sb) 231 { 232 char *p; 233 struct qnx6_sb_info *sbi = QNX6_SB(sb); 234 substring_t args[MAX_OPT_ARGS]; 235 236 if (!options) 237 return 1; 238 239 while ((p = strsep(&options, ",")) != NULL) { 240 int token; 241 if (!*p) 242 continue; 243 244 token = match_token(p, tokens, args); 245 switch (token) { 246 case Opt_mmifs: 247 set_opt(sbi->s_mount_opt, MMI_FS); 248 break; 249 default: 250 return 0; 251 } 252 } 253 return 1; 254 } 255 256 static struct buffer_head *qnx6_check_first_superblock(struct super_block *s, 257 int offset, int silent) 258 { 259 struct qnx6_sb_info *sbi = QNX6_SB(s); 260 struct buffer_head *bh; 261 struct qnx6_super_block *sb; 262 263 /* Check the superblock signatures 264 start with the first superblock */ 265 bh = sb_bread(s, offset); 266 if (!bh) { 267 pr_err("unable to read the first superblock\n"); 268 return NULL; 269 } 270 sb = (struct qnx6_super_block *)bh->b_data; 271 if (fs32_to_cpu(sbi, sb->sb_magic) != QNX6_SUPER_MAGIC) { 272 sbi->s_bytesex = BYTESEX_BE; 273 if (fs32_to_cpu(sbi, sb->sb_magic) == QNX6_SUPER_MAGIC) { 274 /* we got a big endian fs */ 275 pr_debug("fs got different endianness.\n"); 276 return bh; 277 } else 278 sbi->s_bytesex = BYTESEX_LE; 279 if (!silent) { 280 if (offset == 0) { 281 pr_err("wrong signature (magic) in superblock #1.\n"); 282 } else { 283 pr_info("wrong signature (magic) at position (0x%lx) - will try alternative position (0x0000).\n", 284 offset * s->s_blocksize); 285 } 286 } 287 brelse(bh); 288 return NULL; 289 } 290 return bh; 291 } 292 293 static struct inode *qnx6_private_inode(struct super_block *s, 294 struct qnx6_root_node *p); 295 296 static int qnx6_fill_super(struct super_block *s, void *data, int silent) 297 { 298 struct buffer_head *bh1 = NULL, *bh2 = NULL; 299 struct qnx6_super_block *sb1 = NULL, *sb2 = NULL; 300 struct qnx6_sb_info *sbi; 301 struct inode *root; 302 const char *errmsg; 303 struct qnx6_sb_info *qs; 304 int ret = -EINVAL; 305 u64 offset; 306 int bootblock_offset = QNX6_BOOTBLOCK_SIZE; 307 308 qs = kzalloc(sizeof(struct qnx6_sb_info), GFP_KERNEL); 309 if (!qs) 310 return -ENOMEM; 311 s->s_fs_info = qs; 312 313 /* Superblock always is 512 Byte long */ 314 if (!sb_set_blocksize(s, QNX6_SUPERBLOCK_SIZE)) { 315 pr_err("unable to set blocksize\n"); 316 goto outnobh; 317 } 318 319 /* parse the mount-options */ 320 if (!qnx6_parse_options((char *) data, s)) { 321 pr_err("invalid mount options.\n"); 322 goto outnobh; 323 } 324 if (test_opt(s, MMI_FS)) { 325 sb1 = qnx6_mmi_fill_super(s, silent); 326 if (sb1) 327 goto mmi_success; 328 else 329 goto outnobh; 330 } 331 sbi = QNX6_SB(s); 332 sbi->s_bytesex = BYTESEX_LE; 333 /* Check the superblock signatures 334 start with the first superblock */ 335 bh1 = qnx6_check_first_superblock(s, 336 bootblock_offset / QNX6_SUPERBLOCK_SIZE, silent); 337 if (!bh1) { 338 /* try again without bootblock offset */ 339 bh1 = qnx6_check_first_superblock(s, 0, silent); 340 if (!bh1) { 341 pr_err("unable to read the first superblock\n"); 342 goto outnobh; 343 } 344 /* seems that no bootblock at partition start */ 345 bootblock_offset = 0; 346 } 347 sb1 = (struct qnx6_super_block *)bh1->b_data; 348 349 #ifdef CONFIG_QNX6FS_DEBUG 350 qnx6_superblock_debug(sb1, s); 351 #endif 352 353 /* checksum check - start at byte 8 and end at byte 512 */ 354 if (fs32_to_cpu(sbi, sb1->sb_checksum) != 355 crc32_be(0, (char *)(bh1->b_data + 8), 504)) { 356 pr_err("superblock #1 checksum error\n"); 357 goto out; 358 } 359 360 /* set new blocksize */ 361 if (!sb_set_blocksize(s, fs32_to_cpu(sbi, sb1->sb_blocksize))) { 362 pr_err("unable to set blocksize\n"); 363 goto out; 364 } 365 /* blocksize invalidates bh - pull it back in */ 366 brelse(bh1); 367 bh1 = sb_bread(s, bootblock_offset >> s->s_blocksize_bits); 368 if (!bh1) 369 goto outnobh; 370 sb1 = (struct qnx6_super_block *)bh1->b_data; 371 372 /* calculate second superblock blocknumber */ 373 offset = fs32_to_cpu(sbi, sb1->sb_num_blocks) + 374 (bootblock_offset >> s->s_blocksize_bits) + 375 (QNX6_SUPERBLOCK_AREA >> s->s_blocksize_bits); 376 377 /* set bootblock offset */ 378 sbi->s_blks_off = (bootblock_offset >> s->s_blocksize_bits) + 379 (QNX6_SUPERBLOCK_AREA >> s->s_blocksize_bits); 380 381 /* next the second superblock */ 382 bh2 = sb_bread(s, offset); 383 if (!bh2) { 384 pr_err("unable to read the second superblock\n"); 385 goto out; 386 } 387 sb2 = (struct qnx6_super_block *)bh2->b_data; 388 if (fs32_to_cpu(sbi, sb2->sb_magic) != QNX6_SUPER_MAGIC) { 389 if (!silent) 390 pr_err("wrong signature (magic) in superblock #2.\n"); 391 goto out; 392 } 393 394 /* checksum check - start at byte 8 and end at byte 512 */ 395 if (fs32_to_cpu(sbi, sb2->sb_checksum) != 396 crc32_be(0, (char *)(bh2->b_data + 8), 504)) { 397 pr_err("superblock #2 checksum error\n"); 398 goto out; 399 } 400 401 if (fs64_to_cpu(sbi, sb1->sb_serial) >= 402 fs64_to_cpu(sbi, sb2->sb_serial)) { 403 /* superblock #1 active */ 404 sbi->sb_buf = bh1; 405 sbi->sb = (struct qnx6_super_block *)bh1->b_data; 406 brelse(bh2); 407 pr_info("superblock #1 active\n"); 408 } else { 409 /* superblock #2 active */ 410 sbi->sb_buf = bh2; 411 sbi->sb = (struct qnx6_super_block *)bh2->b_data; 412 brelse(bh1); 413 pr_info("superblock #2 active\n"); 414 } 415 mmi_success: 416 /* sanity check - limit maximum indirect pointer levels */ 417 if (sb1->Inode.levels > QNX6_PTR_MAX_LEVELS) { 418 pr_err("too many inode levels (max %i, sb %i)\n", 419 QNX6_PTR_MAX_LEVELS, sb1->Inode.levels); 420 goto out; 421 } 422 if (sb1->Longfile.levels > QNX6_PTR_MAX_LEVELS) { 423 pr_err("too many longfilename levels (max %i, sb %i)\n", 424 QNX6_PTR_MAX_LEVELS, sb1->Longfile.levels); 425 goto out; 426 } 427 s->s_op = &qnx6_sops; 428 s->s_magic = QNX6_SUPER_MAGIC; 429 s->s_flags |= SB_RDONLY; /* Yup, read-only yet */ 430 s->s_time_min = 0; 431 s->s_time_max = U32_MAX; 432 433 /* ease the later tree level calculations */ 434 sbi = QNX6_SB(s); 435 sbi->s_ptrbits = ilog2(s->s_blocksize / 4); 436 sbi->inodes = qnx6_private_inode(s, &sb1->Inode); 437 if (!sbi->inodes) 438 goto out; 439 sbi->longfile = qnx6_private_inode(s, &sb1->Longfile); 440 if (!sbi->longfile) 441 goto out1; 442 443 /* prefetch root inode */ 444 root = qnx6_iget(s, QNX6_ROOT_INO); 445 if (IS_ERR(root)) { 446 pr_err("get inode failed\n"); 447 ret = PTR_ERR(root); 448 goto out2; 449 } 450 451 ret = -ENOMEM; 452 s->s_root = d_make_root(root); 453 if (!s->s_root) 454 goto out2; 455 456 ret = -EINVAL; 457 errmsg = qnx6_checkroot(s); 458 if (errmsg != NULL) { 459 if (!silent) 460 pr_err("%s\n", errmsg); 461 goto out3; 462 } 463 return 0; 464 465 out3: 466 dput(s->s_root); 467 s->s_root = NULL; 468 out2: 469 iput(sbi->longfile); 470 out1: 471 iput(sbi->inodes); 472 out: 473 brelse(bh1); 474 brelse(bh2); 475 outnobh: 476 kfree(qs); 477 s->s_fs_info = NULL; 478 return ret; 479 } 480 481 static void qnx6_put_super(struct super_block *sb) 482 { 483 struct qnx6_sb_info *qs = QNX6_SB(sb); 484 brelse(qs->sb_buf); 485 iput(qs->longfile); 486 iput(qs->inodes); 487 kfree(qs); 488 sb->s_fs_info = NULL; 489 return; 490 } 491 492 static sector_t qnx6_bmap(struct address_space *mapping, sector_t block) 493 { 494 return generic_block_bmap(mapping, block, qnx6_get_block); 495 } 496 static const struct address_space_operations qnx6_aops = { 497 .read_folio = qnx6_read_folio, 498 .readahead = qnx6_readahead, 499 .bmap = qnx6_bmap 500 }; 501 502 static struct inode *qnx6_private_inode(struct super_block *s, 503 struct qnx6_root_node *p) 504 { 505 struct inode *inode = new_inode(s); 506 if (inode) { 507 struct qnx6_inode_info *ei = QNX6_I(inode); 508 struct qnx6_sb_info *sbi = QNX6_SB(s); 509 inode->i_size = fs64_to_cpu(sbi, p->size); 510 memcpy(ei->di_block_ptr, p->ptr, sizeof(p->ptr)); 511 ei->di_filelevels = p->levels; 512 inode->i_mode = S_IFREG | S_IRUSR; /* probably wrong */ 513 inode->i_mapping->a_ops = &qnx6_aops; 514 } 515 return inode; 516 } 517 518 struct inode *qnx6_iget(struct super_block *sb, unsigned ino) 519 { 520 struct qnx6_sb_info *sbi = QNX6_SB(sb); 521 struct qnx6_inode_entry *raw_inode; 522 struct inode *inode; 523 struct qnx6_inode_info *ei; 524 struct address_space *mapping; 525 struct page *page; 526 u32 n, offs; 527 528 inode = iget_locked(sb, ino); 529 if (!inode) 530 return ERR_PTR(-ENOMEM); 531 if (!(inode->i_state & I_NEW)) 532 return inode; 533 534 ei = QNX6_I(inode); 535 536 inode->i_mode = 0; 537 538 if (ino == 0) { 539 pr_err("bad inode number on dev %s: %u is out of range\n", 540 sb->s_id, ino); 541 iget_failed(inode); 542 return ERR_PTR(-EIO); 543 } 544 n = (ino - 1) >> (PAGE_SHIFT - QNX6_INODE_SIZE_BITS); 545 offs = (ino - 1) & (~PAGE_MASK >> QNX6_INODE_SIZE_BITS); 546 mapping = sbi->inodes->i_mapping; 547 page = read_mapping_page(mapping, n, NULL); 548 if (IS_ERR(page)) { 549 pr_err("major problem: unable to read inode from dev %s\n", 550 sb->s_id); 551 iget_failed(inode); 552 return ERR_CAST(page); 553 } 554 kmap(page); 555 raw_inode = ((struct qnx6_inode_entry *)page_address(page)) + offs; 556 557 inode->i_mode = fs16_to_cpu(sbi, raw_inode->di_mode); 558 i_uid_write(inode, (uid_t)fs32_to_cpu(sbi, raw_inode->di_uid)); 559 i_gid_write(inode, (gid_t)fs32_to_cpu(sbi, raw_inode->di_gid)); 560 inode->i_size = fs64_to_cpu(sbi, raw_inode->di_size); 561 inode_set_mtime(inode, fs32_to_cpu(sbi, raw_inode->di_mtime), 0); 562 inode_set_atime(inode, fs32_to_cpu(sbi, raw_inode->di_atime), 0); 563 inode_set_ctime(inode, fs32_to_cpu(sbi, raw_inode->di_ctime), 0); 564 565 /* calc blocks based on 512 byte blocksize */ 566 inode->i_blocks = (inode->i_size + 511) >> 9; 567 568 memcpy(&ei->di_block_ptr, &raw_inode->di_block_ptr, 569 sizeof(raw_inode->di_block_ptr)); 570 ei->di_filelevels = raw_inode->di_filelevels; 571 572 if (S_ISREG(inode->i_mode)) { 573 inode->i_fop = &generic_ro_fops; 574 inode->i_mapping->a_ops = &qnx6_aops; 575 } else if (S_ISDIR(inode->i_mode)) { 576 inode->i_op = &qnx6_dir_inode_operations; 577 inode->i_fop = &qnx6_dir_operations; 578 inode->i_mapping->a_ops = &qnx6_aops; 579 } else if (S_ISLNK(inode->i_mode)) { 580 inode->i_op = &page_symlink_inode_operations; 581 inode_nohighmem(inode); 582 inode->i_mapping->a_ops = &qnx6_aops; 583 } else 584 init_special_inode(inode, inode->i_mode, 0); 585 qnx6_put_page(page); 586 unlock_new_inode(inode); 587 return inode; 588 } 589 590 static struct kmem_cache *qnx6_inode_cachep; 591 592 static struct inode *qnx6_alloc_inode(struct super_block *sb) 593 { 594 struct qnx6_inode_info *ei; 595 ei = alloc_inode_sb(sb, qnx6_inode_cachep, GFP_KERNEL); 596 if (!ei) 597 return NULL; 598 return &ei->vfs_inode; 599 } 600 601 static void qnx6_free_inode(struct inode *inode) 602 { 603 kmem_cache_free(qnx6_inode_cachep, QNX6_I(inode)); 604 } 605 606 static void init_once(void *foo) 607 { 608 struct qnx6_inode_info *ei = (struct qnx6_inode_info *) foo; 609 610 inode_init_once(&ei->vfs_inode); 611 } 612 613 static int init_inodecache(void) 614 { 615 qnx6_inode_cachep = kmem_cache_create("qnx6_inode_cache", 616 sizeof(struct qnx6_inode_info), 617 0, (SLAB_RECLAIM_ACCOUNT| 618 SLAB_MEM_SPREAD|SLAB_ACCOUNT), 619 init_once); 620 if (!qnx6_inode_cachep) 621 return -ENOMEM; 622 return 0; 623 } 624 625 static void destroy_inodecache(void) 626 { 627 /* 628 * Make sure all delayed rcu free inodes are flushed before we 629 * destroy cache. 630 */ 631 rcu_barrier(); 632 kmem_cache_destroy(qnx6_inode_cachep); 633 } 634 635 static struct dentry *qnx6_mount(struct file_system_type *fs_type, 636 int flags, const char *dev_name, void *data) 637 { 638 return mount_bdev(fs_type, flags, dev_name, data, qnx6_fill_super); 639 } 640 641 static struct file_system_type qnx6_fs_type = { 642 .owner = THIS_MODULE, 643 .name = "qnx6", 644 .mount = qnx6_mount, 645 .kill_sb = kill_block_super, 646 .fs_flags = FS_REQUIRES_DEV, 647 }; 648 MODULE_ALIAS_FS("qnx6"); 649 650 static int __init init_qnx6_fs(void) 651 { 652 int err; 653 654 err = init_inodecache(); 655 if (err) 656 return err; 657 658 err = register_filesystem(&qnx6_fs_type); 659 if (err) { 660 destroy_inodecache(); 661 return err; 662 } 663 664 pr_info("QNX6 filesystem 1.0.0 registered.\n"); 665 return 0; 666 } 667 668 static void __exit exit_qnx6_fs(void) 669 { 670 unregister_filesystem(&qnx6_fs_type); 671 destroy_inodecache(); 672 } 673 674 module_init(init_qnx6_fs) 675 module_exit(exit_qnx6_fs) 676 MODULE_LICENSE("GPL"); 677