1 /* 2 * linux/fs/minix/inode.c 3 * 4 * Copyright (C) 1991, 1992 Linus Torvalds 5 * 6 * Copyright (C) 1996 Gertjan van Wingerde (gertjan@cs.vu.nl) 7 * Minix V2 fs support. 8 * 9 * Modified for 680x0 by Andreas Schwab 10 * Updated to filesystem version 3 by Daniel Aragones 11 */ 12 13 #include <linux/module.h> 14 #include "minix.h" 15 #include <linux/buffer_head.h> 16 #include <linux/slab.h> 17 #include <linux/init.h> 18 #include <linux/highuid.h> 19 #include <linux/vfs.h> 20 21 static int minix_write_inode(struct inode * inode, int wait); 22 static int minix_statfs(struct dentry *dentry, struct kstatfs *buf); 23 static int minix_remount (struct super_block * sb, int * flags, char * data); 24 25 static void minix_delete_inode(struct inode *inode) 26 { 27 truncate_inode_pages(&inode->i_data, 0); 28 inode->i_size = 0; 29 minix_truncate(inode); 30 minix_free_inode(inode); 31 } 32 33 static void minix_put_super(struct super_block *sb) 34 { 35 int i; 36 struct minix_sb_info *sbi = minix_sb(sb); 37 38 if (!(sb->s_flags & MS_RDONLY)) { 39 if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */ 40 sbi->s_ms->s_state = sbi->s_mount_state; 41 mark_buffer_dirty(sbi->s_sbh); 42 } 43 for (i = 0; i < sbi->s_imap_blocks; i++) 44 brelse(sbi->s_imap[i]); 45 for (i = 0; i < sbi->s_zmap_blocks; i++) 46 brelse(sbi->s_zmap[i]); 47 brelse (sbi->s_sbh); 48 kfree(sbi->s_imap); 49 sb->s_fs_info = NULL; 50 kfree(sbi); 51 52 return; 53 } 54 55 static struct kmem_cache * minix_inode_cachep; 56 57 static struct inode *minix_alloc_inode(struct super_block *sb) 58 { 59 struct minix_inode_info *ei; 60 ei = (struct minix_inode_info *)kmem_cache_alloc(minix_inode_cachep, GFP_KERNEL); 61 if (!ei) 62 return NULL; 63 return &ei->vfs_inode; 64 } 65 66 static void minix_destroy_inode(struct inode *inode) 67 { 68 kmem_cache_free(minix_inode_cachep, minix_i(inode)); 69 } 70 71 static void init_once(struct kmem_cache * cachep, void *foo) 72 { 73 struct minix_inode_info *ei = (struct minix_inode_info *) foo; 74 75 inode_init_once(&ei->vfs_inode); 76 } 77 78 static int init_inodecache(void) 79 { 80 minix_inode_cachep = kmem_cache_create("minix_inode_cache", 81 sizeof(struct minix_inode_info), 82 0, (SLAB_RECLAIM_ACCOUNT| 83 SLAB_MEM_SPREAD), 84 init_once); 85 if (minix_inode_cachep == NULL) 86 return -ENOMEM; 87 return 0; 88 } 89 90 static void destroy_inodecache(void) 91 { 92 kmem_cache_destroy(minix_inode_cachep); 93 } 94 95 static const struct super_operations minix_sops = { 96 .alloc_inode = minix_alloc_inode, 97 .destroy_inode = minix_destroy_inode, 98 .write_inode = minix_write_inode, 99 .delete_inode = minix_delete_inode, 100 .put_super = minix_put_super, 101 .statfs = minix_statfs, 102 .remount_fs = minix_remount, 103 }; 104 105 static int minix_remount (struct super_block * sb, int * flags, char * data) 106 { 107 struct minix_sb_info * sbi = minix_sb(sb); 108 struct minix_super_block * ms; 109 110 ms = sbi->s_ms; 111 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) 112 return 0; 113 if (*flags & MS_RDONLY) { 114 if (ms->s_state & MINIX_VALID_FS || 115 !(sbi->s_mount_state & MINIX_VALID_FS)) 116 return 0; 117 /* Mounting a rw partition read-only. */ 118 if (sbi->s_version != MINIX_V3) 119 ms->s_state = sbi->s_mount_state; 120 mark_buffer_dirty(sbi->s_sbh); 121 } else { 122 /* Mount a partition which is read-only, read-write. */ 123 if (sbi->s_version != MINIX_V3) { 124 sbi->s_mount_state = ms->s_state; 125 ms->s_state &= ~MINIX_VALID_FS; 126 } else { 127 sbi->s_mount_state = MINIX_VALID_FS; 128 } 129 mark_buffer_dirty(sbi->s_sbh); 130 131 if (!(sbi->s_mount_state & MINIX_VALID_FS)) 132 printk("MINIX-fs warning: remounting unchecked fs, " 133 "running fsck is recommended\n"); 134 else if ((sbi->s_mount_state & MINIX_ERROR_FS)) 135 printk("MINIX-fs warning: remounting fs with errors, " 136 "running fsck is recommended\n"); 137 } 138 return 0; 139 } 140 141 static int minix_fill_super(struct super_block *s, void *data, int silent) 142 { 143 struct buffer_head *bh; 144 struct buffer_head **map; 145 struct minix_super_block *ms; 146 struct minix3_super_block *m3s = NULL; 147 unsigned long i, block; 148 struct inode *root_inode; 149 struct minix_sb_info *sbi; 150 int ret = -EINVAL; 151 152 sbi = kzalloc(sizeof(struct minix_sb_info), GFP_KERNEL); 153 if (!sbi) 154 return -ENOMEM; 155 s->s_fs_info = sbi; 156 157 BUILD_BUG_ON(32 != sizeof (struct minix_inode)); 158 BUILD_BUG_ON(64 != sizeof(struct minix2_inode)); 159 160 if (!sb_set_blocksize(s, BLOCK_SIZE)) 161 goto out_bad_hblock; 162 163 if (!(bh = sb_bread(s, 1))) 164 goto out_bad_sb; 165 166 ms = (struct minix_super_block *) bh->b_data; 167 sbi->s_ms = ms; 168 sbi->s_sbh = bh; 169 sbi->s_mount_state = ms->s_state; 170 sbi->s_ninodes = ms->s_ninodes; 171 sbi->s_nzones = ms->s_nzones; 172 sbi->s_imap_blocks = ms->s_imap_blocks; 173 sbi->s_zmap_blocks = ms->s_zmap_blocks; 174 sbi->s_firstdatazone = ms->s_firstdatazone; 175 sbi->s_log_zone_size = ms->s_log_zone_size; 176 sbi->s_max_size = ms->s_max_size; 177 s->s_magic = ms->s_magic; 178 if (s->s_magic == MINIX_SUPER_MAGIC) { 179 sbi->s_version = MINIX_V1; 180 sbi->s_dirsize = 16; 181 sbi->s_namelen = 14; 182 sbi->s_link_max = MINIX_LINK_MAX; 183 } else if (s->s_magic == MINIX_SUPER_MAGIC2) { 184 sbi->s_version = MINIX_V1; 185 sbi->s_dirsize = 32; 186 sbi->s_namelen = 30; 187 sbi->s_link_max = MINIX_LINK_MAX; 188 } else if (s->s_magic == MINIX2_SUPER_MAGIC) { 189 sbi->s_version = MINIX_V2; 190 sbi->s_nzones = ms->s_zones; 191 sbi->s_dirsize = 16; 192 sbi->s_namelen = 14; 193 sbi->s_link_max = MINIX2_LINK_MAX; 194 } else if (s->s_magic == MINIX2_SUPER_MAGIC2) { 195 sbi->s_version = MINIX_V2; 196 sbi->s_nzones = ms->s_zones; 197 sbi->s_dirsize = 32; 198 sbi->s_namelen = 30; 199 sbi->s_link_max = MINIX2_LINK_MAX; 200 } else if ( *(__u16 *)(bh->b_data + 24) == MINIX3_SUPER_MAGIC) { 201 m3s = (struct minix3_super_block *) bh->b_data; 202 s->s_magic = m3s->s_magic; 203 sbi->s_imap_blocks = m3s->s_imap_blocks; 204 sbi->s_zmap_blocks = m3s->s_zmap_blocks; 205 sbi->s_firstdatazone = m3s->s_firstdatazone; 206 sbi->s_log_zone_size = m3s->s_log_zone_size; 207 sbi->s_max_size = m3s->s_max_size; 208 sbi->s_ninodes = m3s->s_ninodes; 209 sbi->s_nzones = m3s->s_zones; 210 sbi->s_dirsize = 64; 211 sbi->s_namelen = 60; 212 sbi->s_version = MINIX_V3; 213 sbi->s_link_max = MINIX2_LINK_MAX; 214 sbi->s_mount_state = MINIX_VALID_FS; 215 sb_set_blocksize(s, m3s->s_blocksize); 216 } else 217 goto out_no_fs; 218 219 /* 220 * Allocate the buffer map to keep the superblock small. 221 */ 222 if (sbi->s_imap_blocks == 0 || sbi->s_zmap_blocks == 0) 223 goto out_illegal_sb; 224 i = (sbi->s_imap_blocks + sbi->s_zmap_blocks) * sizeof(bh); 225 map = kzalloc(i, GFP_KERNEL); 226 if (!map) 227 goto out_no_map; 228 sbi->s_imap = &map[0]; 229 sbi->s_zmap = &map[sbi->s_imap_blocks]; 230 231 block=2; 232 for (i=0 ; i < sbi->s_imap_blocks ; i++) { 233 if (!(sbi->s_imap[i]=sb_bread(s, block))) 234 goto out_no_bitmap; 235 block++; 236 } 237 for (i=0 ; i < sbi->s_zmap_blocks ; i++) { 238 if (!(sbi->s_zmap[i]=sb_bread(s, block))) 239 goto out_no_bitmap; 240 block++; 241 } 242 243 minix_set_bit(0,sbi->s_imap[0]->b_data); 244 minix_set_bit(0,sbi->s_zmap[0]->b_data); 245 246 /* set up enough so that it can read an inode */ 247 s->s_op = &minix_sops; 248 root_inode = minix_iget(s, MINIX_ROOT_INO); 249 if (IS_ERR(root_inode)) { 250 ret = PTR_ERR(root_inode); 251 goto out_no_root; 252 } 253 254 ret = -ENOMEM; 255 s->s_root = d_alloc_root(root_inode); 256 if (!s->s_root) 257 goto out_iput; 258 259 if (!NO_TRUNCATE) 260 s->s_root->d_op = &minix_dentry_operations; 261 262 if (!(s->s_flags & MS_RDONLY)) { 263 if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */ 264 ms->s_state &= ~MINIX_VALID_FS; 265 mark_buffer_dirty(bh); 266 } 267 if (!(sbi->s_mount_state & MINIX_VALID_FS)) 268 printk("MINIX-fs: mounting unchecked file system, " 269 "running fsck is recommended\n"); 270 else if (sbi->s_mount_state & MINIX_ERROR_FS) 271 printk("MINIX-fs: mounting file system with errors, " 272 "running fsck is recommended\n"); 273 return 0; 274 275 out_iput: 276 iput(root_inode); 277 goto out_freemap; 278 279 out_no_root: 280 if (!silent) 281 printk("MINIX-fs: get root inode failed\n"); 282 goto out_freemap; 283 284 out_no_bitmap: 285 printk("MINIX-fs: bad superblock or unable to read bitmaps\n"); 286 out_freemap: 287 for (i = 0; i < sbi->s_imap_blocks; i++) 288 brelse(sbi->s_imap[i]); 289 for (i = 0; i < sbi->s_zmap_blocks; i++) 290 brelse(sbi->s_zmap[i]); 291 kfree(sbi->s_imap); 292 goto out_release; 293 294 out_no_map: 295 ret = -ENOMEM; 296 if (!silent) 297 printk("MINIX-fs: can't allocate map\n"); 298 goto out_release; 299 300 out_illegal_sb: 301 if (!silent) 302 printk("MINIX-fs: bad superblock\n"); 303 goto out_release; 304 305 out_no_fs: 306 if (!silent) 307 printk("VFS: Can't find a Minix filesystem V1 | V2 | V3 " 308 "on device %s.\n", s->s_id); 309 out_release: 310 brelse(bh); 311 goto out; 312 313 out_bad_hblock: 314 printk("MINIX-fs: blocksize too small for device\n"); 315 goto out; 316 317 out_bad_sb: 318 printk("MINIX-fs: unable to read superblock\n"); 319 out: 320 s->s_fs_info = NULL; 321 kfree(sbi); 322 return ret; 323 } 324 325 static int minix_statfs(struct dentry *dentry, struct kstatfs *buf) 326 { 327 struct minix_sb_info *sbi = minix_sb(dentry->d_sb); 328 buf->f_type = dentry->d_sb->s_magic; 329 buf->f_bsize = dentry->d_sb->s_blocksize; 330 buf->f_blocks = (sbi->s_nzones - sbi->s_firstdatazone) << sbi->s_log_zone_size; 331 buf->f_bfree = minix_count_free_blocks(sbi); 332 buf->f_bavail = buf->f_bfree; 333 buf->f_files = sbi->s_ninodes; 334 buf->f_ffree = minix_count_free_inodes(sbi); 335 buf->f_namelen = sbi->s_namelen; 336 return 0; 337 } 338 339 static int minix_get_block(struct inode *inode, sector_t block, 340 struct buffer_head *bh_result, int create) 341 { 342 if (INODE_VERSION(inode) == MINIX_V1) 343 return V1_minix_get_block(inode, block, bh_result, create); 344 else 345 return V2_minix_get_block(inode, block, bh_result, create); 346 } 347 348 static int minix_writepage(struct page *page, struct writeback_control *wbc) 349 { 350 return block_write_full_page(page, minix_get_block, wbc); 351 } 352 353 static int minix_readpage(struct file *file, struct page *page) 354 { 355 return block_read_full_page(page,minix_get_block); 356 } 357 358 int __minix_write_begin(struct file *file, struct address_space *mapping, 359 loff_t pos, unsigned len, unsigned flags, 360 struct page **pagep, void **fsdata) 361 { 362 return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, 363 minix_get_block); 364 } 365 366 static int minix_write_begin(struct file *file, struct address_space *mapping, 367 loff_t pos, unsigned len, unsigned flags, 368 struct page **pagep, void **fsdata) 369 { 370 *pagep = NULL; 371 return __minix_write_begin(file, mapping, pos, len, flags, pagep, fsdata); 372 } 373 374 static sector_t minix_bmap(struct address_space *mapping, sector_t block) 375 { 376 return generic_block_bmap(mapping,block,minix_get_block); 377 } 378 379 static const struct address_space_operations minix_aops = { 380 .readpage = minix_readpage, 381 .writepage = minix_writepage, 382 .sync_page = block_sync_page, 383 .write_begin = minix_write_begin, 384 .write_end = generic_write_end, 385 .bmap = minix_bmap 386 }; 387 388 static const struct inode_operations minix_symlink_inode_operations = { 389 .readlink = generic_readlink, 390 .follow_link = page_follow_link_light, 391 .put_link = page_put_link, 392 .getattr = minix_getattr, 393 }; 394 395 void minix_set_inode(struct inode *inode, dev_t rdev) 396 { 397 if (S_ISREG(inode->i_mode)) { 398 inode->i_op = &minix_file_inode_operations; 399 inode->i_fop = &minix_file_operations; 400 inode->i_mapping->a_ops = &minix_aops; 401 } else if (S_ISDIR(inode->i_mode)) { 402 inode->i_op = &minix_dir_inode_operations; 403 inode->i_fop = &minix_dir_operations; 404 inode->i_mapping->a_ops = &minix_aops; 405 } else if (S_ISLNK(inode->i_mode)) { 406 inode->i_op = &minix_symlink_inode_operations; 407 inode->i_mapping->a_ops = &minix_aops; 408 } else 409 init_special_inode(inode, inode->i_mode, rdev); 410 } 411 412 /* 413 * The minix V1 function to read an inode. 414 */ 415 static struct inode *V1_minix_iget(struct inode *inode) 416 { 417 struct buffer_head * bh; 418 struct minix_inode * raw_inode; 419 struct minix_inode_info *minix_inode = minix_i(inode); 420 int i; 421 422 raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); 423 if (!raw_inode) { 424 iget_failed(inode); 425 return ERR_PTR(-EIO); 426 } 427 inode->i_mode = raw_inode->i_mode; 428 inode->i_uid = (uid_t)raw_inode->i_uid; 429 inode->i_gid = (gid_t)raw_inode->i_gid; 430 inode->i_nlink = raw_inode->i_nlinks; 431 inode->i_size = raw_inode->i_size; 432 inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = raw_inode->i_time; 433 inode->i_mtime.tv_nsec = 0; 434 inode->i_atime.tv_nsec = 0; 435 inode->i_ctime.tv_nsec = 0; 436 inode->i_blocks = 0; 437 for (i = 0; i < 9; i++) 438 minix_inode->u.i1_data[i] = raw_inode->i_zone[i]; 439 minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); 440 brelse(bh); 441 unlock_new_inode(inode); 442 return inode; 443 } 444 445 /* 446 * The minix V2 function to read an inode. 447 */ 448 static struct inode *V2_minix_iget(struct inode *inode) 449 { 450 struct buffer_head * bh; 451 struct minix2_inode * raw_inode; 452 struct minix_inode_info *minix_inode = minix_i(inode); 453 int i; 454 455 raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); 456 if (!raw_inode) { 457 iget_failed(inode); 458 return ERR_PTR(-EIO); 459 } 460 inode->i_mode = raw_inode->i_mode; 461 inode->i_uid = (uid_t)raw_inode->i_uid; 462 inode->i_gid = (gid_t)raw_inode->i_gid; 463 inode->i_nlink = raw_inode->i_nlinks; 464 inode->i_size = raw_inode->i_size; 465 inode->i_mtime.tv_sec = raw_inode->i_mtime; 466 inode->i_atime.tv_sec = raw_inode->i_atime; 467 inode->i_ctime.tv_sec = raw_inode->i_ctime; 468 inode->i_mtime.tv_nsec = 0; 469 inode->i_atime.tv_nsec = 0; 470 inode->i_ctime.tv_nsec = 0; 471 inode->i_blocks = 0; 472 for (i = 0; i < 10; i++) 473 minix_inode->u.i2_data[i] = raw_inode->i_zone[i]; 474 minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); 475 brelse(bh); 476 unlock_new_inode(inode); 477 return inode; 478 } 479 480 /* 481 * The global function to read an inode. 482 */ 483 struct inode *minix_iget(struct super_block *sb, unsigned long ino) 484 { 485 struct inode *inode; 486 487 inode = iget_locked(sb, ino); 488 if (!inode) 489 return ERR_PTR(-ENOMEM); 490 if (!(inode->i_state & I_NEW)) 491 return inode; 492 493 if (INODE_VERSION(inode) == MINIX_V1) 494 return V1_minix_iget(inode); 495 else 496 return V2_minix_iget(inode); 497 } 498 499 /* 500 * The minix V1 function to synchronize an inode. 501 */ 502 static struct buffer_head * V1_minix_update_inode(struct inode * inode) 503 { 504 struct buffer_head * bh; 505 struct minix_inode * raw_inode; 506 struct minix_inode_info *minix_inode = minix_i(inode); 507 int i; 508 509 raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); 510 if (!raw_inode) 511 return NULL; 512 raw_inode->i_mode = inode->i_mode; 513 raw_inode->i_uid = fs_high2lowuid(inode->i_uid); 514 raw_inode->i_gid = fs_high2lowgid(inode->i_gid); 515 raw_inode->i_nlinks = inode->i_nlink; 516 raw_inode->i_size = inode->i_size; 517 raw_inode->i_time = inode->i_mtime.tv_sec; 518 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 519 raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); 520 else for (i = 0; i < 9; i++) 521 raw_inode->i_zone[i] = minix_inode->u.i1_data[i]; 522 mark_buffer_dirty(bh); 523 return bh; 524 } 525 526 /* 527 * The minix V2 function to synchronize an inode. 528 */ 529 static struct buffer_head * V2_minix_update_inode(struct inode * inode) 530 { 531 struct buffer_head * bh; 532 struct minix2_inode * raw_inode; 533 struct minix_inode_info *minix_inode = minix_i(inode); 534 int i; 535 536 raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); 537 if (!raw_inode) 538 return NULL; 539 raw_inode->i_mode = inode->i_mode; 540 raw_inode->i_uid = fs_high2lowuid(inode->i_uid); 541 raw_inode->i_gid = fs_high2lowgid(inode->i_gid); 542 raw_inode->i_nlinks = inode->i_nlink; 543 raw_inode->i_size = inode->i_size; 544 raw_inode->i_mtime = inode->i_mtime.tv_sec; 545 raw_inode->i_atime = inode->i_atime.tv_sec; 546 raw_inode->i_ctime = inode->i_ctime.tv_sec; 547 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 548 raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); 549 else for (i = 0; i < 10; i++) 550 raw_inode->i_zone[i] = minix_inode->u.i2_data[i]; 551 mark_buffer_dirty(bh); 552 return bh; 553 } 554 555 static struct buffer_head *minix_update_inode(struct inode *inode) 556 { 557 if (INODE_VERSION(inode) == MINIX_V1) 558 return V1_minix_update_inode(inode); 559 else 560 return V2_minix_update_inode(inode); 561 } 562 563 static int minix_write_inode(struct inode * inode, int wait) 564 { 565 brelse(minix_update_inode(inode)); 566 return 0; 567 } 568 569 int minix_sync_inode(struct inode * inode) 570 { 571 int err = 0; 572 struct buffer_head *bh; 573 574 bh = minix_update_inode(inode); 575 if (bh && buffer_dirty(bh)) 576 { 577 sync_dirty_buffer(bh); 578 if (buffer_req(bh) && !buffer_uptodate(bh)) 579 { 580 printk("IO error syncing minix inode [%s:%08lx]\n", 581 inode->i_sb->s_id, inode->i_ino); 582 err = -1; 583 } 584 } 585 else if (!bh) 586 err = -1; 587 brelse (bh); 588 return err; 589 } 590 591 int minix_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) 592 { 593 struct inode *dir = dentry->d_parent->d_inode; 594 struct super_block *sb = dir->i_sb; 595 generic_fillattr(dentry->d_inode, stat); 596 if (INODE_VERSION(dentry->d_inode) == MINIX_V1) 597 stat->blocks = (BLOCK_SIZE / 512) * V1_minix_blocks(stat->size, sb); 598 else 599 stat->blocks = (sb->s_blocksize / 512) * V2_minix_blocks(stat->size, sb); 600 stat->blksize = sb->s_blocksize; 601 return 0; 602 } 603 604 /* 605 * The function that is called for file truncation. 606 */ 607 void minix_truncate(struct inode * inode) 608 { 609 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))) 610 return; 611 if (INODE_VERSION(inode) == MINIX_V1) 612 V1_minix_truncate(inode); 613 else 614 V2_minix_truncate(inode); 615 } 616 617 static int minix_get_sb(struct file_system_type *fs_type, 618 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 619 { 620 return get_sb_bdev(fs_type, flags, dev_name, data, minix_fill_super, 621 mnt); 622 } 623 624 static struct file_system_type minix_fs_type = { 625 .owner = THIS_MODULE, 626 .name = "minix", 627 .get_sb = minix_get_sb, 628 .kill_sb = kill_block_super, 629 .fs_flags = FS_REQUIRES_DEV, 630 }; 631 632 static int __init init_minix_fs(void) 633 { 634 int err = init_inodecache(); 635 if (err) 636 goto out1; 637 err = register_filesystem(&minix_fs_type); 638 if (err) 639 goto out; 640 return 0; 641 out: 642 destroy_inodecache(); 643 out1: 644 return err; 645 } 646 647 static void __exit exit_minix_fs(void) 648 { 649 unregister_filesystem(&minix_fs_type); 650 destroy_inodecache(); 651 } 652 653 module_init(init_minix_fs) 654 module_exit(exit_minix_fs) 655 MODULE_LICENSE("GPL"); 656 657