1 /* 2 * linux/fs/minix/inode.c 3 * 4 * Copyright (C) 1991, 1992 Linus Torvalds 5 * 6 * Copyright (C) 1996 Gertjan van Wingerde 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 #include <linux/writeback.h> 21 22 static int minix_write_inode(struct inode *inode, 23 struct writeback_control *wbc); 24 static int minix_statfs(struct dentry *dentry, struct kstatfs *buf); 25 static int minix_remount (struct super_block * sb, int * flags, char * data); 26 27 static void minix_evict_inode(struct inode *inode) 28 { 29 truncate_inode_pages(&inode->i_data, 0); 30 if (!inode->i_nlink) { 31 inode->i_size = 0; 32 minix_truncate(inode); 33 } 34 invalidate_inode_buffers(inode); 35 end_writeback(inode); 36 if (!inode->i_nlink) 37 minix_free_inode(inode); 38 } 39 40 static void minix_put_super(struct super_block *sb) 41 { 42 int i; 43 struct minix_sb_info *sbi = minix_sb(sb); 44 45 if (!(sb->s_flags & MS_RDONLY)) { 46 if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */ 47 sbi->s_ms->s_state = sbi->s_mount_state; 48 mark_buffer_dirty(sbi->s_sbh); 49 } 50 for (i = 0; i < sbi->s_imap_blocks; i++) 51 brelse(sbi->s_imap[i]); 52 for (i = 0; i < sbi->s_zmap_blocks; i++) 53 brelse(sbi->s_zmap[i]); 54 brelse (sbi->s_sbh); 55 kfree(sbi->s_imap); 56 sb->s_fs_info = NULL; 57 kfree(sbi); 58 } 59 60 static struct kmem_cache * minix_inode_cachep; 61 62 static struct inode *minix_alloc_inode(struct super_block *sb) 63 { 64 struct minix_inode_info *ei; 65 ei = (struct minix_inode_info *)kmem_cache_alloc(minix_inode_cachep, GFP_KERNEL); 66 if (!ei) 67 return NULL; 68 return &ei->vfs_inode; 69 } 70 71 static void minix_destroy_inode(struct inode *inode) 72 { 73 kmem_cache_free(minix_inode_cachep, minix_i(inode)); 74 } 75 76 static void init_once(void *foo) 77 { 78 struct minix_inode_info *ei = (struct minix_inode_info *) foo; 79 80 inode_init_once(&ei->vfs_inode); 81 } 82 83 static int init_inodecache(void) 84 { 85 minix_inode_cachep = kmem_cache_create("minix_inode_cache", 86 sizeof(struct minix_inode_info), 87 0, (SLAB_RECLAIM_ACCOUNT| 88 SLAB_MEM_SPREAD), 89 init_once); 90 if (minix_inode_cachep == NULL) 91 return -ENOMEM; 92 return 0; 93 } 94 95 static void destroy_inodecache(void) 96 { 97 kmem_cache_destroy(minix_inode_cachep); 98 } 99 100 static const struct super_operations minix_sops = { 101 .alloc_inode = minix_alloc_inode, 102 .destroy_inode = minix_destroy_inode, 103 .write_inode = minix_write_inode, 104 .evict_inode = minix_evict_inode, 105 .put_super = minix_put_super, 106 .statfs = minix_statfs, 107 .remount_fs = minix_remount, 108 }; 109 110 static int minix_remount (struct super_block * sb, int * flags, char * data) 111 { 112 struct minix_sb_info * sbi = minix_sb(sb); 113 struct minix_super_block * ms; 114 115 ms = sbi->s_ms; 116 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) 117 return 0; 118 if (*flags & MS_RDONLY) { 119 if (ms->s_state & MINIX_VALID_FS || 120 !(sbi->s_mount_state & MINIX_VALID_FS)) 121 return 0; 122 /* Mounting a rw partition read-only. */ 123 if (sbi->s_version != MINIX_V3) 124 ms->s_state = sbi->s_mount_state; 125 mark_buffer_dirty(sbi->s_sbh); 126 } else { 127 /* Mount a partition which is read-only, read-write. */ 128 if (sbi->s_version != MINIX_V3) { 129 sbi->s_mount_state = ms->s_state; 130 ms->s_state &= ~MINIX_VALID_FS; 131 } else { 132 sbi->s_mount_state = MINIX_VALID_FS; 133 } 134 mark_buffer_dirty(sbi->s_sbh); 135 136 if (!(sbi->s_mount_state & MINIX_VALID_FS)) 137 printk("MINIX-fs warning: remounting unchecked fs, " 138 "running fsck is recommended\n"); 139 else if ((sbi->s_mount_state & MINIX_ERROR_FS)) 140 printk("MINIX-fs warning: remounting fs with errors, " 141 "running fsck is recommended\n"); 142 } 143 return 0; 144 } 145 146 static int minix_fill_super(struct super_block *s, void *data, int silent) 147 { 148 struct buffer_head *bh; 149 struct buffer_head **map; 150 struct minix_super_block *ms; 151 struct minix3_super_block *m3s = NULL; 152 unsigned long i, block; 153 struct inode *root_inode; 154 struct minix_sb_info *sbi; 155 int ret = -EINVAL; 156 157 sbi = kzalloc(sizeof(struct minix_sb_info), GFP_KERNEL); 158 if (!sbi) 159 return -ENOMEM; 160 s->s_fs_info = sbi; 161 162 BUILD_BUG_ON(32 != sizeof (struct minix_inode)); 163 BUILD_BUG_ON(64 != sizeof(struct minix2_inode)); 164 165 if (!sb_set_blocksize(s, BLOCK_SIZE)) 166 goto out_bad_hblock; 167 168 if (!(bh = sb_bread(s, 1))) 169 goto out_bad_sb; 170 171 ms = (struct minix_super_block *) bh->b_data; 172 sbi->s_ms = ms; 173 sbi->s_sbh = bh; 174 sbi->s_mount_state = ms->s_state; 175 sbi->s_ninodes = ms->s_ninodes; 176 sbi->s_nzones = ms->s_nzones; 177 sbi->s_imap_blocks = ms->s_imap_blocks; 178 sbi->s_zmap_blocks = ms->s_zmap_blocks; 179 sbi->s_firstdatazone = ms->s_firstdatazone; 180 sbi->s_log_zone_size = ms->s_log_zone_size; 181 sbi->s_max_size = ms->s_max_size; 182 s->s_magic = ms->s_magic; 183 if (s->s_magic == MINIX_SUPER_MAGIC) { 184 sbi->s_version = MINIX_V1; 185 sbi->s_dirsize = 16; 186 sbi->s_namelen = 14; 187 sbi->s_link_max = MINIX_LINK_MAX; 188 } else if (s->s_magic == MINIX_SUPER_MAGIC2) { 189 sbi->s_version = MINIX_V1; 190 sbi->s_dirsize = 32; 191 sbi->s_namelen = 30; 192 sbi->s_link_max = MINIX_LINK_MAX; 193 } else if (s->s_magic == MINIX2_SUPER_MAGIC) { 194 sbi->s_version = MINIX_V2; 195 sbi->s_nzones = ms->s_zones; 196 sbi->s_dirsize = 16; 197 sbi->s_namelen = 14; 198 sbi->s_link_max = MINIX2_LINK_MAX; 199 } else if (s->s_magic == MINIX2_SUPER_MAGIC2) { 200 sbi->s_version = MINIX_V2; 201 sbi->s_nzones = ms->s_zones; 202 sbi->s_dirsize = 32; 203 sbi->s_namelen = 30; 204 sbi->s_link_max = MINIX2_LINK_MAX; 205 } else if ( *(__u16 *)(bh->b_data + 24) == MINIX3_SUPER_MAGIC) { 206 m3s = (struct minix3_super_block *) bh->b_data; 207 s->s_magic = m3s->s_magic; 208 sbi->s_imap_blocks = m3s->s_imap_blocks; 209 sbi->s_zmap_blocks = m3s->s_zmap_blocks; 210 sbi->s_firstdatazone = m3s->s_firstdatazone; 211 sbi->s_log_zone_size = m3s->s_log_zone_size; 212 sbi->s_max_size = m3s->s_max_size; 213 sbi->s_ninodes = m3s->s_ninodes; 214 sbi->s_nzones = m3s->s_zones; 215 sbi->s_dirsize = 64; 216 sbi->s_namelen = 60; 217 sbi->s_version = MINIX_V3; 218 sbi->s_link_max = MINIX2_LINK_MAX; 219 sbi->s_mount_state = MINIX_VALID_FS; 220 sb_set_blocksize(s, m3s->s_blocksize); 221 } else 222 goto out_no_fs; 223 224 /* 225 * Allocate the buffer map to keep the superblock small. 226 */ 227 if (sbi->s_imap_blocks == 0 || sbi->s_zmap_blocks == 0) 228 goto out_illegal_sb; 229 i = (sbi->s_imap_blocks + sbi->s_zmap_blocks) * sizeof(bh); 230 map = kzalloc(i, GFP_KERNEL); 231 if (!map) 232 goto out_no_map; 233 sbi->s_imap = &map[0]; 234 sbi->s_zmap = &map[sbi->s_imap_blocks]; 235 236 block=2; 237 for (i=0 ; i < sbi->s_imap_blocks ; i++) { 238 if (!(sbi->s_imap[i]=sb_bread(s, block))) 239 goto out_no_bitmap; 240 block++; 241 } 242 for (i=0 ; i < sbi->s_zmap_blocks ; i++) { 243 if (!(sbi->s_zmap[i]=sb_bread(s, block))) 244 goto out_no_bitmap; 245 block++; 246 } 247 248 minix_set_bit(0,sbi->s_imap[0]->b_data); 249 minix_set_bit(0,sbi->s_zmap[0]->b_data); 250 251 /* set up enough so that it can read an inode */ 252 s->s_op = &minix_sops; 253 root_inode = minix_iget(s, MINIX_ROOT_INO); 254 if (IS_ERR(root_inode)) { 255 ret = PTR_ERR(root_inode); 256 goto out_no_root; 257 } 258 259 ret = -ENOMEM; 260 s->s_root = d_alloc_root(root_inode); 261 if (!s->s_root) 262 goto out_iput; 263 264 if (!(s->s_flags & MS_RDONLY)) { 265 if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */ 266 ms->s_state &= ~MINIX_VALID_FS; 267 mark_buffer_dirty(bh); 268 } 269 if (!(sbi->s_mount_state & MINIX_VALID_FS)) 270 printk("MINIX-fs: mounting unchecked file system, " 271 "running fsck is recommended\n"); 272 else if (sbi->s_mount_state & MINIX_ERROR_FS) 273 printk("MINIX-fs: mounting file system with errors, " 274 "running fsck is recommended\n"); 275 return 0; 276 277 out_iput: 278 iput(root_inode); 279 goto out_freemap; 280 281 out_no_root: 282 if (!silent) 283 printk("MINIX-fs: get root inode failed\n"); 284 goto out_freemap; 285 286 out_no_bitmap: 287 printk("MINIX-fs: bad superblock or unable to read bitmaps\n"); 288 out_freemap: 289 for (i = 0; i < sbi->s_imap_blocks; i++) 290 brelse(sbi->s_imap[i]); 291 for (i = 0; i < sbi->s_zmap_blocks; i++) 292 brelse(sbi->s_zmap[i]); 293 kfree(sbi->s_imap); 294 goto out_release; 295 296 out_no_map: 297 ret = -ENOMEM; 298 if (!silent) 299 printk("MINIX-fs: can't allocate map\n"); 300 goto out_release; 301 302 out_illegal_sb: 303 if (!silent) 304 printk("MINIX-fs: bad superblock\n"); 305 goto out_release; 306 307 out_no_fs: 308 if (!silent) 309 printk("VFS: Can't find a Minix filesystem V1 | V2 | V3 " 310 "on device %s.\n", s->s_id); 311 out_release: 312 brelse(bh); 313 goto out; 314 315 out_bad_hblock: 316 printk("MINIX-fs: blocksize too small for device\n"); 317 goto out; 318 319 out_bad_sb: 320 printk("MINIX-fs: unable to read superblock\n"); 321 out: 322 s->s_fs_info = NULL; 323 kfree(sbi); 324 return ret; 325 } 326 327 static int minix_statfs(struct dentry *dentry, struct kstatfs *buf) 328 { 329 struct super_block *sb = dentry->d_sb; 330 struct minix_sb_info *sbi = minix_sb(sb); 331 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 332 buf->f_type = sb->s_magic; 333 buf->f_bsize = sb->s_blocksize; 334 buf->f_blocks = (sbi->s_nzones - sbi->s_firstdatazone) << sbi->s_log_zone_size; 335 buf->f_bfree = minix_count_free_blocks(sbi); 336 buf->f_bavail = buf->f_bfree; 337 buf->f_files = sbi->s_ninodes; 338 buf->f_ffree = minix_count_free_inodes(sbi); 339 buf->f_namelen = sbi->s_namelen; 340 buf->f_fsid.val[0] = (u32)id; 341 buf->f_fsid.val[1] = (u32)(id >> 32); 342 343 return 0; 344 } 345 346 static int minix_get_block(struct inode *inode, sector_t block, 347 struct buffer_head *bh_result, int create) 348 { 349 if (INODE_VERSION(inode) == MINIX_V1) 350 return V1_minix_get_block(inode, block, bh_result, create); 351 else 352 return V2_minix_get_block(inode, block, bh_result, create); 353 } 354 355 static int minix_writepage(struct page *page, struct writeback_control *wbc) 356 { 357 return block_write_full_page(page, minix_get_block, wbc); 358 } 359 360 static int minix_readpage(struct file *file, struct page *page) 361 { 362 return block_read_full_page(page,minix_get_block); 363 } 364 365 int minix_prepare_chunk(struct page *page, loff_t pos, unsigned len) 366 { 367 return __block_write_begin(page, pos, len, minix_get_block); 368 } 369 370 static int minix_write_begin(struct file *file, struct address_space *mapping, 371 loff_t pos, unsigned len, unsigned flags, 372 struct page **pagep, void **fsdata) 373 { 374 int ret; 375 376 ret = block_write_begin(mapping, pos, len, flags, pagep, 377 minix_get_block); 378 if (unlikely(ret)) { 379 loff_t isize = mapping->host->i_size; 380 if (pos + len > isize) 381 vmtruncate(mapping->host, isize); 382 } 383 384 return ret; 385 } 386 387 static sector_t minix_bmap(struct address_space *mapping, sector_t block) 388 { 389 return generic_block_bmap(mapping,block,minix_get_block); 390 } 391 392 static const struct address_space_operations minix_aops = { 393 .readpage = minix_readpage, 394 .writepage = minix_writepage, 395 .sync_page = block_sync_page, 396 .write_begin = minix_write_begin, 397 .write_end = generic_write_end, 398 .bmap = minix_bmap 399 }; 400 401 static const struct inode_operations minix_symlink_inode_operations = { 402 .readlink = generic_readlink, 403 .follow_link = page_follow_link_light, 404 .put_link = page_put_link, 405 .getattr = minix_getattr, 406 }; 407 408 void minix_set_inode(struct inode *inode, dev_t rdev) 409 { 410 if (S_ISREG(inode->i_mode)) { 411 inode->i_op = &minix_file_inode_operations; 412 inode->i_fop = &minix_file_operations; 413 inode->i_mapping->a_ops = &minix_aops; 414 } else if (S_ISDIR(inode->i_mode)) { 415 inode->i_op = &minix_dir_inode_operations; 416 inode->i_fop = &minix_dir_operations; 417 inode->i_mapping->a_ops = &minix_aops; 418 } else if (S_ISLNK(inode->i_mode)) { 419 inode->i_op = &minix_symlink_inode_operations; 420 inode->i_mapping->a_ops = &minix_aops; 421 } else 422 init_special_inode(inode, inode->i_mode, rdev); 423 } 424 425 /* 426 * The minix V1 function to read an inode. 427 */ 428 static struct inode *V1_minix_iget(struct inode *inode) 429 { 430 struct buffer_head * bh; 431 struct minix_inode * raw_inode; 432 struct minix_inode_info *minix_inode = minix_i(inode); 433 int i; 434 435 raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); 436 if (!raw_inode) { 437 iget_failed(inode); 438 return ERR_PTR(-EIO); 439 } 440 inode->i_mode = raw_inode->i_mode; 441 inode->i_uid = (uid_t)raw_inode->i_uid; 442 inode->i_gid = (gid_t)raw_inode->i_gid; 443 inode->i_nlink = raw_inode->i_nlinks; 444 inode->i_size = raw_inode->i_size; 445 inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = raw_inode->i_time; 446 inode->i_mtime.tv_nsec = 0; 447 inode->i_atime.tv_nsec = 0; 448 inode->i_ctime.tv_nsec = 0; 449 inode->i_blocks = 0; 450 for (i = 0; i < 9; i++) 451 minix_inode->u.i1_data[i] = raw_inode->i_zone[i]; 452 minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); 453 brelse(bh); 454 unlock_new_inode(inode); 455 return inode; 456 } 457 458 /* 459 * The minix V2 function to read an inode. 460 */ 461 static struct inode *V2_minix_iget(struct inode *inode) 462 { 463 struct buffer_head * bh; 464 struct minix2_inode * raw_inode; 465 struct minix_inode_info *minix_inode = minix_i(inode); 466 int i; 467 468 raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); 469 if (!raw_inode) { 470 iget_failed(inode); 471 return ERR_PTR(-EIO); 472 } 473 inode->i_mode = raw_inode->i_mode; 474 inode->i_uid = (uid_t)raw_inode->i_uid; 475 inode->i_gid = (gid_t)raw_inode->i_gid; 476 inode->i_nlink = raw_inode->i_nlinks; 477 inode->i_size = raw_inode->i_size; 478 inode->i_mtime.tv_sec = raw_inode->i_mtime; 479 inode->i_atime.tv_sec = raw_inode->i_atime; 480 inode->i_ctime.tv_sec = raw_inode->i_ctime; 481 inode->i_mtime.tv_nsec = 0; 482 inode->i_atime.tv_nsec = 0; 483 inode->i_ctime.tv_nsec = 0; 484 inode->i_blocks = 0; 485 for (i = 0; i < 10; i++) 486 minix_inode->u.i2_data[i] = raw_inode->i_zone[i]; 487 minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); 488 brelse(bh); 489 unlock_new_inode(inode); 490 return inode; 491 } 492 493 /* 494 * The global function to read an inode. 495 */ 496 struct inode *minix_iget(struct super_block *sb, unsigned long ino) 497 { 498 struct inode *inode; 499 500 inode = iget_locked(sb, ino); 501 if (!inode) 502 return ERR_PTR(-ENOMEM); 503 if (!(inode->i_state & I_NEW)) 504 return inode; 505 506 if (INODE_VERSION(inode) == MINIX_V1) 507 return V1_minix_iget(inode); 508 else 509 return V2_minix_iget(inode); 510 } 511 512 /* 513 * The minix V1 function to synchronize an inode. 514 */ 515 static struct buffer_head * V1_minix_update_inode(struct inode * inode) 516 { 517 struct buffer_head * bh; 518 struct minix_inode * raw_inode; 519 struct minix_inode_info *minix_inode = minix_i(inode); 520 int i; 521 522 raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); 523 if (!raw_inode) 524 return NULL; 525 raw_inode->i_mode = inode->i_mode; 526 raw_inode->i_uid = fs_high2lowuid(inode->i_uid); 527 raw_inode->i_gid = fs_high2lowgid(inode->i_gid); 528 raw_inode->i_nlinks = inode->i_nlink; 529 raw_inode->i_size = inode->i_size; 530 raw_inode->i_time = inode->i_mtime.tv_sec; 531 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 532 raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); 533 else for (i = 0; i < 9; i++) 534 raw_inode->i_zone[i] = minix_inode->u.i1_data[i]; 535 mark_buffer_dirty(bh); 536 return bh; 537 } 538 539 /* 540 * The minix V2 function to synchronize an inode. 541 */ 542 static struct buffer_head * V2_minix_update_inode(struct inode * inode) 543 { 544 struct buffer_head * bh; 545 struct minix2_inode * raw_inode; 546 struct minix_inode_info *minix_inode = minix_i(inode); 547 int i; 548 549 raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); 550 if (!raw_inode) 551 return NULL; 552 raw_inode->i_mode = inode->i_mode; 553 raw_inode->i_uid = fs_high2lowuid(inode->i_uid); 554 raw_inode->i_gid = fs_high2lowgid(inode->i_gid); 555 raw_inode->i_nlinks = inode->i_nlink; 556 raw_inode->i_size = inode->i_size; 557 raw_inode->i_mtime = inode->i_mtime.tv_sec; 558 raw_inode->i_atime = inode->i_atime.tv_sec; 559 raw_inode->i_ctime = inode->i_ctime.tv_sec; 560 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 561 raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); 562 else for (i = 0; i < 10; i++) 563 raw_inode->i_zone[i] = minix_inode->u.i2_data[i]; 564 mark_buffer_dirty(bh); 565 return bh; 566 } 567 568 static int minix_write_inode(struct inode *inode, struct writeback_control *wbc) 569 { 570 int err = 0; 571 struct buffer_head *bh; 572 573 if (INODE_VERSION(inode) == MINIX_V1) 574 bh = V1_minix_update_inode(inode); 575 else 576 bh = V2_minix_update_inode(inode); 577 if (!bh) 578 return -EIO; 579 if (wbc->sync_mode == WB_SYNC_ALL && buffer_dirty(bh)) { 580 sync_dirty_buffer(bh); 581 if (buffer_req(bh) && !buffer_uptodate(bh)) { 582 printk("IO error syncing minix inode [%s:%08lx]\n", 583 inode->i_sb->s_id, inode->i_ino); 584 err = -EIO; 585 } 586 } 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 struct dentry *minix_mount(struct file_system_type *fs_type, 618 int flags, const char *dev_name, void *data) 619 { 620 return mount_bdev(fs_type, flags, dev_name, data, minix_fill_super); 621 } 622 623 static struct file_system_type minix_fs_type = { 624 .owner = THIS_MODULE, 625 .name = "minix", 626 .mount = minix_mount, 627 .kill_sb = kill_block_super, 628 .fs_flags = FS_REQUIRES_DEV, 629 }; 630 631 static int __init init_minix_fs(void) 632 { 633 int err = init_inodecache(); 634 if (err) 635 goto out1; 636 err = register_filesystem(&minix_fs_type); 637 if (err) 638 goto out; 639 return 0; 640 out: 641 destroy_inodecache(); 642 out1: 643 return err; 644 } 645 646 static void __exit exit_minix_fs(void) 647 { 648 unregister_filesystem(&minix_fs_type); 649 destroy_inodecache(); 650 } 651 652 module_init(init_minix_fs) 653 module_exit(exit_minix_fs) 654 MODULE_LICENSE("GPL"); 655 656