Blame view
fs/qnx6/inode.c
17.2 KB
09c434b8a
|
1 |
// SPDX-License-Identifier: GPL-2.0-only |
5d026c724
|
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 |
/* * QNX6 file system, Linux implementation. * * Version : 1.0.0 * * History : * * 01-02-2012 by Kai Bankett (chaosman@ontika.net) : first release. * 16-02-2012 pagemap extension by Al Viro * */ #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/highuid.h> #include <linux/pagemap.h> #include <linux/buffer_head.h> #include <linux/writeback.h> #include <linux/statfs.h> #include <linux/parser.h> #include <linux/seq_file.h> #include <linux/mount.h> #include <linux/crc32.h> #include <linux/mpage.h> #include "qnx6.h" static const struct super_operations qnx6_sops; static void qnx6_put_super(struct super_block *sb); static struct inode *qnx6_alloc_inode(struct super_block *sb); |
45c2a3ff3
|
33 |
static void qnx6_free_inode(struct inode *inode); |
5d026c724
|
34 35 36 37 38 39 |
static int qnx6_remount(struct super_block *sb, int *flags, char *data); static int qnx6_statfs(struct dentry *dentry, struct kstatfs *buf); static int qnx6_show_options(struct seq_file *seq, struct dentry *root); static const struct super_operations qnx6_sops = { .alloc_inode = qnx6_alloc_inode, |
45c2a3ff3
|
40 |
.free_inode = qnx6_free_inode, |
5d026c724
|
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 |
.put_super = qnx6_put_super, .statfs = qnx6_statfs, .remount_fs = qnx6_remount, .show_options = qnx6_show_options, }; static int qnx6_show_options(struct seq_file *seq, struct dentry *root) { struct super_block *sb = root->d_sb; struct qnx6_sb_info *sbi = QNX6_SB(sb); if (sbi->s_mount_opt & QNX6_MOUNT_MMI_FS) seq_puts(seq, ",mmi_fs"); return 0; } static int qnx6_remount(struct super_block *sb, int *flags, char *data) { |
02b9984d6
|
59 |
sync_filesystem(sb); |
1751e8a6c
|
60 |
*flags |= SB_RDONLY; |
5d026c724
|
61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 |
return 0; } static unsigned qnx6_get_devblock(struct super_block *sb, __fs32 block) { struct qnx6_sb_info *sbi = QNX6_SB(sb); return fs32_to_cpu(sbi, block) + sbi->s_blks_off; } static unsigned qnx6_block_map(struct inode *inode, unsigned iblock); static int qnx6_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh, int create) { unsigned phys; |
fa5a7a41a
|
76 77 78 |
pr_debug("qnx6_get_block inode=[%ld] iblock=[%ld] ", inode->i_ino, (unsigned long)iblock); |
5d026c724
|
79 80 81 82 83 84 85 86 87 88 89 90 |
phys = qnx6_block_map(inode, iblock); if (phys) { /* logical block is before EOF */ map_bh(bh, inode->i_sb, phys); } return 0; } static int qnx6_check_blockptr(__fs32 ptr) { if (ptr == ~(__fs32)0) { |
e6c326165
|
91 92 |
pr_err("hit unused blockpointer. "); |
5d026c724
|
93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 |
return 0; } return 1; } static int qnx6_readpage(struct file *file, struct page *page) { return mpage_readpage(page, qnx6_get_block); } static int qnx6_readpages(struct file *file, struct address_space *mapping, struct list_head *pages, unsigned nr_pages) { return mpage_readpages(mapping, pages, nr_pages, qnx6_get_block); } /* * returns the block number for the no-th element in the tree * inodebits requred as there are multiple inodes in one inode block */ static unsigned qnx6_block_map(struct inode *inode, unsigned no) { struct super_block *s = inode->i_sb; struct qnx6_sb_info *sbi = QNX6_SB(s); struct qnx6_inode_info *ei = QNX6_I(inode); unsigned block = 0; struct buffer_head *bh; __fs32 ptr; int levelptr; int ptrbits = sbi->s_ptrbits; int bitdelta; u32 mask = (1 << ptrbits) - 1; int depth = ei->di_filelevels; int i; bitdelta = ptrbits * depth; levelptr = no >> bitdelta; if (levelptr > QNX6_NO_DIRECT_POINTERS - 1) { |
e6c326165
|
132 |
pr_err("Requested file block number (%u) too big.", no); |
5d026c724
|
133 134 135 136 137 138 139 140 |
return 0; } block = qnx6_get_devblock(s, ei->di_block_ptr[levelptr]); for (i = 0; i < depth; i++) { bh = sb_bread(s, block); if (!bh) { |
e6c326165
|
141 142 |
pr_err("Error reading block (%u) ", block); |
5d026c724
|
143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 |
return 0; } bitdelta -= ptrbits; levelptr = (no >> bitdelta) & mask; ptr = ((__fs32 *)bh->b_data)[levelptr]; if (!qnx6_check_blockptr(ptr)) return 0; block = qnx6_get_devblock(s, ptr); brelse(bh); } return block; } static int qnx6_statfs(struct dentry *dentry, struct kstatfs *buf) { struct super_block *sb = dentry->d_sb; struct qnx6_sb_info *sbi = QNX6_SB(sb); u64 id = huge_encode_dev(sb->s_bdev->bd_dev); buf->f_type = sb->s_magic; buf->f_bsize = sb->s_blocksize; buf->f_blocks = fs32_to_cpu(sbi, sbi->sb->sb_num_blocks); buf->f_bfree = fs32_to_cpu(sbi, sbi->sb->sb_free_blocks); buf->f_files = fs32_to_cpu(sbi, sbi->sb->sb_num_inodes); buf->f_ffree = fs32_to_cpu(sbi, sbi->sb->sb_free_inodes); buf->f_bavail = buf->f_bfree; buf->f_namelen = QNX6_LONG_NAME_MAX; buf->f_fsid.val[0] = (u32)id; buf->f_fsid.val[1] = (u32)(id >> 32); return 0; } /* * Check the root directory of the filesystem to make sure * it really _is_ a qnx6 filesystem, and to check the size * of the directory entry. */ static const char *qnx6_checkroot(struct super_block *s) { static char match_root[2][3] = {".\0\0", "..\0"}; int i, error = 0; struct qnx6_dir_entry *dir_entry; |
2b0143b5c
|
188 |
struct inode *root = d_inode(s->s_root); |
5d026c724
|
189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 |
struct address_space *mapping = root->i_mapping; struct page *page = read_mapping_page(mapping, 0, NULL); if (IS_ERR(page)) return "error reading root directory"; kmap(page); dir_entry = page_address(page); for (i = 0; i < 2; i++) { /* maximum 3 bytes - due to match_root limitation */ if (strncmp(dir_entry[i].de_fname, match_root[i], 3)) error = 1; } qnx6_put_page(page); if (error) return "error reading root directory."; return NULL; } #ifdef CONFIG_QNX6FS_DEBUG void qnx6_superblock_debug(struct qnx6_super_block *sb, struct super_block *s) { struct qnx6_sb_info *sbi = QNX6_SB(s); |
fa5a7a41a
|
210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 |
pr_debug("magic: %08x ", fs32_to_cpu(sbi, sb->sb_magic)); pr_debug("checksum: %08x ", fs32_to_cpu(sbi, sb->sb_checksum)); pr_debug("serial: %llx ", fs64_to_cpu(sbi, sb->sb_serial)); pr_debug("flags: %08x ", fs32_to_cpu(sbi, sb->sb_flags)); pr_debug("blocksize: %08x ", fs32_to_cpu(sbi, sb->sb_blocksize)); pr_debug("num_inodes: %08x ", fs32_to_cpu(sbi, sb->sb_num_inodes)); pr_debug("free_inodes: %08x ", fs32_to_cpu(sbi, sb->sb_free_inodes)); pr_debug("num_blocks: %08x ", fs32_to_cpu(sbi, sb->sb_num_blocks)); pr_debug("free_blocks: %08x ", fs32_to_cpu(sbi, sb->sb_free_blocks)); pr_debug("inode_levels: %02x ", sb->Inode.levels); |
5d026c724
|
230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 |
} #endif enum { Opt_mmifs, Opt_err }; static const match_table_t tokens = { {Opt_mmifs, "mmi_fs"}, {Opt_err, NULL} }; static int qnx6_parse_options(char *options, struct super_block *sb) { char *p; struct qnx6_sb_info *sbi = QNX6_SB(sb); substring_t args[MAX_OPT_ARGS]; if (!options) return 1; while ((p = strsep(&options, ",")) != NULL) { int token; if (!*p) continue; token = match_token(p, tokens, args); switch (token) { case Opt_mmifs: set_opt(sbi->s_mount_opt, MMI_FS); break; default: return 0; } } return 1; } static struct buffer_head *qnx6_check_first_superblock(struct super_block *s, int offset, int silent) { struct qnx6_sb_info *sbi = QNX6_SB(s); struct buffer_head *bh; struct qnx6_super_block *sb; /* Check the superblock signatures start with the first superblock */ bh = sb_bread(s, offset); if (!bh) { |
e6c326165
|
280 281 |
pr_err("unable to read the first superblock "); |
5d026c724
|
282 283 284 285 286 287 288 |
return NULL; } sb = (struct qnx6_super_block *)bh->b_data; if (fs32_to_cpu(sbi, sb->sb_magic) != QNX6_SUPER_MAGIC) { sbi->s_bytesex = BYTESEX_BE; if (fs32_to_cpu(sbi, sb->sb_magic) == QNX6_SUPER_MAGIC) { /* we got a big endian fs */ |
fa5a7a41a
|
289 290 |
pr_debug("fs got different endianness. "); |
5d026c724
|
291 292 293 294 295 |
return bh; } else sbi->s_bytesex = BYTESEX_LE; if (!silent) { if (offset == 0) { |
e6c326165
|
296 297 |
pr_err("wrong signature (magic) in superblock #1. "); |
5d026c724
|
298 |
} else { |
e6c326165
|
299 300 |
pr_info("wrong signature (magic) at position (0x%lx) - will try alternative position (0x0000). ", |
e00d5b5ad
|
301 |
offset * s->s_blocksize); |
5d026c724
|
302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 |
} } brelse(bh); return NULL; } return bh; } static struct inode *qnx6_private_inode(struct super_block *s, struct qnx6_root_node *p); static int qnx6_fill_super(struct super_block *s, void *data, int silent) { struct buffer_head *bh1 = NULL, *bh2 = NULL; struct qnx6_super_block *sb1 = NULL, *sb2 = NULL; struct qnx6_sb_info *sbi; struct inode *root; const char *errmsg; struct qnx6_sb_info *qs; int ret = -EINVAL; u64 offset; int bootblock_offset = QNX6_BOOTBLOCK_SIZE; qs = kzalloc(sizeof(struct qnx6_sb_info), GFP_KERNEL); if (!qs) return -ENOMEM; s->s_fs_info = qs; /* Superblock always is 512 Byte long */ if (!sb_set_blocksize(s, QNX6_SUPERBLOCK_SIZE)) { |
e6c326165
|
332 333 |
pr_err("unable to set blocksize "); |
5d026c724
|
334 335 336 337 338 |
goto outnobh; } /* parse the mount-options */ if (!qnx6_parse_options((char *) data, s)) { |
e6c326165
|
339 340 |
pr_err("invalid mount options. "); |
5d026c724
|
341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 |
goto outnobh; } if (test_opt(s, MMI_FS)) { sb1 = qnx6_mmi_fill_super(s, silent); if (sb1) goto mmi_success; else goto outnobh; } sbi = QNX6_SB(s); sbi->s_bytesex = BYTESEX_LE; /* Check the superblock signatures start with the first superblock */ bh1 = qnx6_check_first_superblock(s, bootblock_offset / QNX6_SUPERBLOCK_SIZE, silent); if (!bh1) { /* try again without bootblock offset */ bh1 = qnx6_check_first_superblock(s, 0, silent); if (!bh1) { |
e6c326165
|
360 361 |
pr_err("unable to read the first superblock "); |
5d026c724
|
362 363 364 365 366 367 368 369 370 371 372 373 374 375 |
goto outnobh; } /* seems that no bootblock at partition start */ bootblock_offset = 0; } sb1 = (struct qnx6_super_block *)bh1->b_data; #ifdef CONFIG_QNX6FS_DEBUG qnx6_superblock_debug(sb1, s); #endif /* checksum check - start at byte 8 and end at byte 512 */ if (fs32_to_cpu(sbi, sb1->sb_checksum) != crc32_be(0, (char *)(bh1->b_data + 8), 504)) { |
e6c326165
|
376 377 |
pr_err("superblock #1 checksum error "); |
5d026c724
|
378 379 380 381 382 |
goto out; } /* set new blocksize */ if (!sb_set_blocksize(s, fs32_to_cpu(sbi, sb1->sb_blocksize))) { |
e6c326165
|
383 384 |
pr_err("unable to set blocksize "); |
5d026c724
|
385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 |
goto out; } /* blocksize invalidates bh - pull it back in */ brelse(bh1); bh1 = sb_bread(s, bootblock_offset >> s->s_blocksize_bits); if (!bh1) goto outnobh; sb1 = (struct qnx6_super_block *)bh1->b_data; /* calculate second superblock blocknumber */ offset = fs32_to_cpu(sbi, sb1->sb_num_blocks) + (bootblock_offset >> s->s_blocksize_bits) + (QNX6_SUPERBLOCK_AREA >> s->s_blocksize_bits); /* set bootblock offset */ sbi->s_blks_off = (bootblock_offset >> s->s_blocksize_bits) + (QNX6_SUPERBLOCK_AREA >> s->s_blocksize_bits); /* next the second superblock */ bh2 = sb_bread(s, offset); if (!bh2) { |
e6c326165
|
406 407 |
pr_err("unable to read the second superblock "); |
5d026c724
|
408 409 410 411 412 |
goto out; } sb2 = (struct qnx6_super_block *)bh2->b_data; if (fs32_to_cpu(sbi, sb2->sb_magic) != QNX6_SUPER_MAGIC) { if (!silent) |
e6c326165
|
413 414 |
pr_err("wrong signature (magic) in superblock #2. "); |
5d026c724
|
415 416 417 418 419 420 |
goto out; } /* checksum check - start at byte 8 and end at byte 512 */ if (fs32_to_cpu(sbi, sb2->sb_checksum) != crc32_be(0, (char *)(bh2->b_data + 8), 504)) { |
e6c326165
|
421 422 |
pr_err("superblock #2 checksum error "); |
5d026c724
|
423 424 425 426 427 428 429 430 431 |
goto out; } if (fs64_to_cpu(sbi, sb1->sb_serial) >= fs64_to_cpu(sbi, sb2->sb_serial)) { /* superblock #1 active */ sbi->sb_buf = bh1; sbi->sb = (struct qnx6_super_block *)bh1->b_data; brelse(bh2); |
e6c326165
|
432 433 |
pr_info("superblock #1 active "); |
5d026c724
|
434 435 436 437 438 |
} else { /* superblock #2 active */ sbi->sb_buf = bh2; sbi->sb = (struct qnx6_super_block *)bh2->b_data; brelse(bh1); |
e6c326165
|
439 440 |
pr_info("superblock #2 active "); |
5d026c724
|
441 442 443 444 |
} mmi_success: /* sanity check - limit maximum indirect pointer levels */ if (sb1->Inode.levels > QNX6_PTR_MAX_LEVELS) { |
e6c326165
|
445 446 |
pr_err("too many inode levels (max %i, sb %i) ", |
e00d5b5ad
|
447 |
QNX6_PTR_MAX_LEVELS, sb1->Inode.levels); |
5d026c724
|
448 449 450 |
goto out; } if (sb1->Longfile.levels > QNX6_PTR_MAX_LEVELS) { |
e6c326165
|
451 452 |
pr_err("too many longfilename levels (max %i, sb %i) ", |
e00d5b5ad
|
453 |
QNX6_PTR_MAX_LEVELS, sb1->Longfile.levels); |
5d026c724
|
454 455 456 457 |
goto out; } s->s_op = &qnx6_sops; s->s_magic = QNX6_SUPER_MAGIC; |
1751e8a6c
|
458 |
s->s_flags |= SB_RDONLY; /* Yup, read-only yet */ |
22b139691
|
459 460 |
s->s_time_min = 0; s->s_time_max = U32_MAX; |
5d026c724
|
461 462 463 464 465 466 467 468 469 470 471 472 473 474 |
/* ease the later tree level calculations */ sbi = QNX6_SB(s); sbi->s_ptrbits = ilog2(s->s_blocksize / 4); sbi->inodes = qnx6_private_inode(s, &sb1->Inode); if (!sbi->inodes) goto out; sbi->longfile = qnx6_private_inode(s, &sb1->Longfile); if (!sbi->longfile) goto out1; /* prefetch root inode */ root = qnx6_iget(s, QNX6_ROOT_INO); if (IS_ERR(root)) { |
e6c326165
|
475 476 |
pr_err("get inode failed "); |
5d026c724
|
477 478 479 480 481 482 483 484 485 486 487 488 489 |
ret = PTR_ERR(root); goto out2; } ret = -ENOMEM; s->s_root = d_make_root(root); if (!s->s_root) goto out2; ret = -EINVAL; errmsg = qnx6_checkroot(s); if (errmsg != NULL) { if (!silent) |
e6c326165
|
490 491 |
pr_err("%s ", errmsg); |
5d026c724
|
492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 |
goto out3; } return 0; out3: dput(s->s_root); s->s_root = NULL; out2: iput(sbi->longfile); out1: iput(sbi->inodes); out: if (bh1) brelse(bh1); if (bh2) brelse(bh2); outnobh: kfree(qs); s->s_fs_info = NULL; return ret; } static void qnx6_put_super(struct super_block *sb) { struct qnx6_sb_info *qs = QNX6_SB(sb); brelse(qs->sb_buf); iput(qs->longfile); iput(qs->inodes); kfree(qs); sb->s_fs_info = NULL; return; } static sector_t qnx6_bmap(struct address_space *mapping, sector_t block) { return generic_block_bmap(mapping, block, qnx6_get_block); } static const struct address_space_operations qnx6_aops = { .readpage = qnx6_readpage, .readpages = qnx6_readpages, .bmap = qnx6_bmap }; static struct inode *qnx6_private_inode(struct super_block *s, struct qnx6_root_node *p) { struct inode *inode = new_inode(s); if (inode) { struct qnx6_inode_info *ei = QNX6_I(inode); struct qnx6_sb_info *sbi = QNX6_SB(s); inode->i_size = fs64_to_cpu(sbi, p->size); memcpy(ei->di_block_ptr, p->ptr, sizeof(p->ptr)); ei->di_filelevels = p->levels; inode->i_mode = S_IFREG | S_IRUSR; /* probably wrong */ inode->i_mapping->a_ops = &qnx6_aops; } return inode; } struct inode *qnx6_iget(struct super_block *sb, unsigned ino) { struct qnx6_sb_info *sbi = QNX6_SB(sb); struct qnx6_inode_entry *raw_inode; struct inode *inode; struct qnx6_inode_info *ei; struct address_space *mapping; struct page *page; u32 n, offs; inode = iget_locked(sb, ino); if (!inode) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; ei = QNX6_I(inode); inode->i_mode = 0; if (ino == 0) { |
e6c326165
|
572 573 |
pr_err("bad inode number on dev %s: %u is out of range ", |
5d026c724
|
574 575 576 577 |
sb->s_id, ino); iget_failed(inode); return ERR_PTR(-EIO); } |
09cbfeaf1
|
578 579 |
n = (ino - 1) >> (PAGE_SHIFT - QNX6_INODE_SIZE_BITS); offs = (ino - 1) & (~PAGE_MASK >> QNX6_INODE_SIZE_BITS); |
5d026c724
|
580 581 582 |
mapping = sbi->inodes->i_mapping; page = read_mapping_page(mapping, n, NULL); if (IS_ERR(page)) { |
e6c326165
|
583 584 |
pr_err("major problem: unable to read inode from dev %s ", |
e00d5b5ad
|
585 |
sb->s_id); |
5d026c724
|
586 587 588 589 590 591 592 |
iget_failed(inode); return ERR_CAST(page); } kmap(page); raw_inode = ((struct qnx6_inode_entry *)page_address(page)) + offs; inode->i_mode = fs16_to_cpu(sbi, raw_inode->di_mode); |
85a03d1bb
|
593 594 |
i_uid_write(inode, (uid_t)fs32_to_cpu(sbi, raw_inode->di_uid)); i_gid_write(inode, (gid_t)fs32_to_cpu(sbi, raw_inode->di_gid)); |
5d026c724
|
595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 |
inode->i_size = fs64_to_cpu(sbi, raw_inode->di_size); inode->i_mtime.tv_sec = fs32_to_cpu(sbi, raw_inode->di_mtime); inode->i_mtime.tv_nsec = 0; inode->i_atime.tv_sec = fs32_to_cpu(sbi, raw_inode->di_atime); inode->i_atime.tv_nsec = 0; inode->i_ctime.tv_sec = fs32_to_cpu(sbi, raw_inode->di_ctime); inode->i_ctime.tv_nsec = 0; /* calc blocks based on 512 byte blocksize */ inode->i_blocks = (inode->i_size + 511) >> 9; memcpy(&ei->di_block_ptr, &raw_inode->di_block_ptr, sizeof(raw_inode->di_block_ptr)); ei->di_filelevels = raw_inode->di_filelevels; if (S_ISREG(inode->i_mode)) { inode->i_fop = &generic_ro_fops; inode->i_mapping->a_ops = &qnx6_aops; } else if (S_ISDIR(inode->i_mode)) { inode->i_op = &qnx6_dir_inode_operations; inode->i_fop = &qnx6_dir_operations; inode->i_mapping->a_ops = &qnx6_aops; } else if (S_ISLNK(inode->i_mode)) { inode->i_op = &page_symlink_inode_operations; |
21fc61c73
|
619 |
inode_nohighmem(inode); |
5d026c724
|
620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 |
inode->i_mapping->a_ops = &qnx6_aops; } else init_special_inode(inode, inode->i_mode, 0); qnx6_put_page(page); unlock_new_inode(inode); return inode; } static struct kmem_cache *qnx6_inode_cachep; static struct inode *qnx6_alloc_inode(struct super_block *sb) { struct qnx6_inode_info *ei; ei = kmem_cache_alloc(qnx6_inode_cachep, GFP_KERNEL); if (!ei) return NULL; return &ei->vfs_inode; } |
45c2a3ff3
|
638 |
static void qnx6_free_inode(struct inode *inode) |
5d026c724
|
639 |
{ |
5d026c724
|
640 641 |
kmem_cache_free(qnx6_inode_cachep, QNX6_I(inode)); } |
5d026c724
|
642 643 644 645 646 647 648 649 650 651 652 653 |
static void init_once(void *foo) { struct qnx6_inode_info *ei = (struct qnx6_inode_info *) foo; inode_init_once(&ei->vfs_inode); } static int init_inodecache(void) { qnx6_inode_cachep = kmem_cache_create("qnx6_inode_cache", sizeof(struct qnx6_inode_info), 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056c
|
654 |
SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
5d026c724
|
655 656 657 658 659 660 661 662 |
init_once); if (!qnx6_inode_cachep) return -ENOMEM; return 0; } static void destroy_inodecache(void) { |
8c0a85377
|
663 664 665 666 667 |
/* * Make sure all delayed rcu free inodes are flushed before we * destroy cache. */ rcu_barrier(); |
5d026c724
|
668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 |
kmem_cache_destroy(qnx6_inode_cachep); } static struct dentry *qnx6_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { return mount_bdev(fs_type, flags, dev_name, data, qnx6_fill_super); } static struct file_system_type qnx6_fs_type = { .owner = THIS_MODULE, .name = "qnx6", .mount = qnx6_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; |
7f78e0351
|
684 |
MODULE_ALIAS_FS("qnx6"); |
5d026c724
|
685 686 687 688 689 690 691 692 693 694 695 696 697 698 |
static int __init init_qnx6_fs(void) { int err; err = init_inodecache(); if (err) return err; err = register_filesystem(&qnx6_fs_type); if (err) { destroy_inodecache(); return err; } |
e00d5b5ad
|
699 700 |
pr_info("QNX6 filesystem 1.0.0 registered. "); |
5d026c724
|
701 702 703 704 705 706 707 708 709 710 711 712 |
return 0; } static void __exit exit_qnx6_fs(void) { unregister_filesystem(&qnx6_fs_type); destroy_inodecache(); } module_init(init_qnx6_fs) module_exit(exit_qnx6_fs) MODULE_LICENSE("GPL"); |