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 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(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 (!(s->s_flags & MS_RDONLY)) { 260 if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */ 261 ms->s_state &= ~MINIX_VALID_FS; 262 mark_buffer_dirty(bh); 263 } 264 if (!(sbi->s_mount_state & MINIX_VALID_FS)) 265 printk("MINIX-fs: mounting unchecked file system, " 266 "running fsck is recommended\n"); 267 else if (sbi->s_mount_state & MINIX_ERROR_FS) 268 printk("MINIX-fs: mounting file system with errors, " 269 "running fsck is recommended\n"); 270 return 0; 271 272 out_iput: 273 iput(root_inode); 274 goto out_freemap; 275 276 out_no_root: 277 if (!silent) 278 printk("MINIX-fs: get root inode failed\n"); 279 goto out_freemap; 280 281 out_no_bitmap: 282 printk("MINIX-fs: bad superblock or unable to read bitmaps\n"); 283 out_freemap: 284 for (i = 0; i < sbi->s_imap_blocks; i++) 285 brelse(sbi->s_imap[i]); 286 for (i = 0; i < sbi->s_zmap_blocks; i++) 287 brelse(sbi->s_zmap[i]); 288 kfree(sbi->s_imap); 289 goto out_release; 290 291 out_no_map: 292 ret = -ENOMEM; 293 if (!silent) 294 printk("MINIX-fs: can't allocate map\n"); 295 goto out_release; 296 297 out_illegal_sb: 298 if (!silent) 299 printk("MINIX-fs: bad superblock\n"); 300 goto out_release; 301 302 out_no_fs: 303 if (!silent) 304 printk("VFS: Can't find a Minix filesystem V1 | V2 | V3 " 305 "on device %s.\n", s->s_id); 306 out_release: 307 brelse(bh); 308 goto out; 309 310 out_bad_hblock: 311 printk("MINIX-fs: blocksize too small for device\n"); 312 goto out; 313 314 out_bad_sb: 315 printk("MINIX-fs: unable to read superblock\n"); 316 out: 317 s->s_fs_info = NULL; 318 kfree(sbi); 319 return ret; 320 } 321 322 static int minix_statfs(struct dentry *dentry, struct kstatfs *buf) 323 { 324 struct super_block *sb = dentry->d_sb; 325 struct minix_sb_info *sbi = minix_sb(sb); 326 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 327 buf->f_type = sb->s_magic; 328 buf->f_bsize = sb->s_blocksize; 329 buf->f_blocks = (sbi->s_nzones - sbi->s_firstdatazone) << sbi->s_log_zone_size; 330 buf->f_bfree = minix_count_free_blocks(sbi); 331 buf->f_bavail = buf->f_bfree; 332 buf->f_files = sbi->s_ninodes; 333 buf->f_ffree = minix_count_free_inodes(sbi); 334 buf->f_namelen = sbi->s_namelen; 335 buf->f_fsid.val[0] = (u32)id; 336 buf->f_fsid.val[1] = (u32)(id >> 32); 337 338 return 0; 339 } 340 341 static int minix_get_block(struct inode *inode, sector_t block, 342 struct buffer_head *bh_result, int create) 343 { 344 if (INODE_VERSION(inode) == MINIX_V1) 345 return V1_minix_get_block(inode, block, bh_result, create); 346 else 347 return V2_minix_get_block(inode, block, bh_result, create); 348 } 349 350 static int minix_writepage(struct page *page, struct writeback_control *wbc) 351 { 352 return block_write_full_page(page, minix_get_block, wbc); 353 } 354 355 static int minix_readpage(struct file *file, struct page *page) 356 { 357 return block_read_full_page(page,minix_get_block); 358 } 359 360 int __minix_write_begin(struct file *file, struct address_space *mapping, 361 loff_t pos, unsigned len, unsigned flags, 362 struct page **pagep, void **fsdata) 363 { 364 return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, 365 minix_get_block); 366 } 367 368 static int minix_write_begin(struct file *file, struct address_space *mapping, 369 loff_t pos, unsigned len, unsigned flags, 370 struct page **pagep, void **fsdata) 371 { 372 *pagep = NULL; 373 return __minix_write_begin(file, mapping, pos, len, flags, pagep, fsdata); 374 } 375 376 static sector_t minix_bmap(struct address_space *mapping, sector_t block) 377 { 378 return generic_block_bmap(mapping,block,minix_get_block); 379 } 380 381 static const struct address_space_operations minix_aops = { 382 .readpage = minix_readpage, 383 .writepage = minix_writepage, 384 .sync_page = block_sync_page, 385 .write_begin = minix_write_begin, 386 .write_end = generic_write_end, 387 .bmap = minix_bmap 388 }; 389 390 static const struct inode_operations minix_symlink_inode_operations = { 391 .readlink = generic_readlink, 392 .follow_link = page_follow_link_light, 393 .put_link = page_put_link, 394 .getattr = minix_getattr, 395 }; 396 397 void minix_set_inode(struct inode *inode, dev_t rdev) 398 { 399 if (S_ISREG(inode->i_mode)) { 400 inode->i_op = &minix_file_inode_operations; 401 inode->i_fop = &minix_file_operations; 402 inode->i_mapping->a_ops = &minix_aops; 403 } else if (S_ISDIR(inode->i_mode)) { 404 inode->i_op = &minix_dir_inode_operations; 405 inode->i_fop = &minix_dir_operations; 406 inode->i_mapping->a_ops = &minix_aops; 407 } else if (S_ISLNK(inode->i_mode)) { 408 inode->i_op = &minix_symlink_inode_operations; 409 inode->i_mapping->a_ops = &minix_aops; 410 } else 411 init_special_inode(inode, inode->i_mode, rdev); 412 } 413 414 /* 415 * The minix V1 function to read an inode. 416 */ 417 static struct inode *V1_minix_iget(struct inode *inode) 418 { 419 struct buffer_head * bh; 420 struct minix_inode * raw_inode; 421 struct minix_inode_info *minix_inode = minix_i(inode); 422 int i; 423 424 raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); 425 if (!raw_inode) { 426 iget_failed(inode); 427 return ERR_PTR(-EIO); 428 } 429 inode->i_mode = raw_inode->i_mode; 430 inode->i_uid = (uid_t)raw_inode->i_uid; 431 inode->i_gid = (gid_t)raw_inode->i_gid; 432 inode->i_nlink = raw_inode->i_nlinks; 433 inode->i_size = raw_inode->i_size; 434 inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = raw_inode->i_time; 435 inode->i_mtime.tv_nsec = 0; 436 inode->i_atime.tv_nsec = 0; 437 inode->i_ctime.tv_nsec = 0; 438 inode->i_blocks = 0; 439 for (i = 0; i < 9; i++) 440 minix_inode->u.i1_data[i] = raw_inode->i_zone[i]; 441 minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); 442 brelse(bh); 443 unlock_new_inode(inode); 444 return inode; 445 } 446 447 /* 448 * The minix V2 function to read an inode. 449 */ 450 static struct inode *V2_minix_iget(struct inode *inode) 451 { 452 struct buffer_head * bh; 453 struct minix2_inode * raw_inode; 454 struct minix_inode_info *minix_inode = minix_i(inode); 455 int i; 456 457 raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); 458 if (!raw_inode) { 459 iget_failed(inode); 460 return ERR_PTR(-EIO); 461 } 462 inode->i_mode = raw_inode->i_mode; 463 inode->i_uid = (uid_t)raw_inode->i_uid; 464 inode->i_gid = (gid_t)raw_inode->i_gid; 465 inode->i_nlink = raw_inode->i_nlinks; 466 inode->i_size = raw_inode->i_size; 467 inode->i_mtime.tv_sec = raw_inode->i_mtime; 468 inode->i_atime.tv_sec = raw_inode->i_atime; 469 inode->i_ctime.tv_sec = raw_inode->i_ctime; 470 inode->i_mtime.tv_nsec = 0; 471 inode->i_atime.tv_nsec = 0; 472 inode->i_ctime.tv_nsec = 0; 473 inode->i_blocks = 0; 474 for (i = 0; i < 10; i++) 475 minix_inode->u.i2_data[i] = raw_inode->i_zone[i]; 476 minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); 477 brelse(bh); 478 unlock_new_inode(inode); 479 return inode; 480 } 481 482 /* 483 * The global function to read an inode. 484 */ 485 struct inode *minix_iget(struct super_block *sb, unsigned long ino) 486 { 487 struct inode *inode; 488 489 inode = iget_locked(sb, ino); 490 if (!inode) 491 return ERR_PTR(-ENOMEM); 492 if (!(inode->i_state & I_NEW)) 493 return inode; 494 495 if (INODE_VERSION(inode) == MINIX_V1) 496 return V1_minix_iget(inode); 497 else 498 return V2_minix_iget(inode); 499 } 500 501 /* 502 * The minix V1 function to synchronize an inode. 503 */ 504 static struct buffer_head * V1_minix_update_inode(struct inode * inode) 505 { 506 struct buffer_head * bh; 507 struct minix_inode * raw_inode; 508 struct minix_inode_info *minix_inode = minix_i(inode); 509 int i; 510 511 raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); 512 if (!raw_inode) 513 return NULL; 514 raw_inode->i_mode = inode->i_mode; 515 raw_inode->i_uid = fs_high2lowuid(inode->i_uid); 516 raw_inode->i_gid = fs_high2lowgid(inode->i_gid); 517 raw_inode->i_nlinks = inode->i_nlink; 518 raw_inode->i_size = inode->i_size; 519 raw_inode->i_time = inode->i_mtime.tv_sec; 520 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 521 raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); 522 else for (i = 0; i < 9; i++) 523 raw_inode->i_zone[i] = minix_inode->u.i1_data[i]; 524 mark_buffer_dirty(bh); 525 return bh; 526 } 527 528 /* 529 * The minix V2 function to synchronize an inode. 530 */ 531 static struct buffer_head * V2_minix_update_inode(struct inode * inode) 532 { 533 struct buffer_head * bh; 534 struct minix2_inode * raw_inode; 535 struct minix_inode_info *minix_inode = minix_i(inode); 536 int i; 537 538 raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); 539 if (!raw_inode) 540 return NULL; 541 raw_inode->i_mode = inode->i_mode; 542 raw_inode->i_uid = fs_high2lowuid(inode->i_uid); 543 raw_inode->i_gid = fs_high2lowgid(inode->i_gid); 544 raw_inode->i_nlinks = inode->i_nlink; 545 raw_inode->i_size = inode->i_size; 546 raw_inode->i_mtime = inode->i_mtime.tv_sec; 547 raw_inode->i_atime = inode->i_atime.tv_sec; 548 raw_inode->i_ctime = inode->i_ctime.tv_sec; 549 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 550 raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); 551 else for (i = 0; i < 10; i++) 552 raw_inode->i_zone[i] = minix_inode->u.i2_data[i]; 553 mark_buffer_dirty(bh); 554 return bh; 555 } 556 557 static struct buffer_head *minix_update_inode(struct inode *inode) 558 { 559 if (INODE_VERSION(inode) == MINIX_V1) 560 return V1_minix_update_inode(inode); 561 else 562 return V2_minix_update_inode(inode); 563 } 564 565 static int minix_write_inode(struct inode * inode, int wait) 566 { 567 brelse(minix_update_inode(inode)); 568 return 0; 569 } 570 571 int minix_sync_inode(struct inode * inode) 572 { 573 int err = 0; 574 struct buffer_head *bh; 575 576 bh = minix_update_inode(inode); 577 if (bh && buffer_dirty(bh)) 578 { 579 sync_dirty_buffer(bh); 580 if (buffer_req(bh) && !buffer_uptodate(bh)) 581 { 582 printk("IO error syncing minix inode [%s:%08lx]\n", 583 inode->i_sb->s_id, inode->i_ino); 584 err = -1; 585 } 586 } 587 else if (!bh) 588 err = -1; 589 brelse (bh); 590 return err; 591 } 592 593 int minix_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) 594 { 595 struct inode *dir = dentry->d_parent->d_inode; 596 struct super_block *sb = dir->i_sb; 597 generic_fillattr(dentry->d_inode, stat); 598 if (INODE_VERSION(dentry->d_inode) == MINIX_V1) 599 stat->blocks = (BLOCK_SIZE / 512) * V1_minix_blocks(stat->size, sb); 600 else 601 stat->blocks = (sb->s_blocksize / 512) * V2_minix_blocks(stat->size, sb); 602 stat->blksize = sb->s_blocksize; 603 return 0; 604 } 605 606 /* 607 * The function that is called for file truncation. 608 */ 609 void minix_truncate(struct inode * inode) 610 { 611 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))) 612 return; 613 if (INODE_VERSION(inode) == MINIX_V1) 614 V1_minix_truncate(inode); 615 else 616 V2_minix_truncate(inode); 617 } 618 619 static int minix_get_sb(struct file_system_type *fs_type, 620 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 621 { 622 return get_sb_bdev(fs_type, flags, dev_name, data, minix_fill_super, 623 mnt); 624 } 625 626 static struct file_system_type minix_fs_type = { 627 .owner = THIS_MODULE, 628 .name = "minix", 629 .get_sb = minix_get_sb, 630 .kill_sb = kill_block_super, 631 .fs_flags = FS_REQUIRES_DEV, 632 }; 633 634 static int __init init_minix_fs(void) 635 { 636 int err = init_inodecache(); 637 if (err) 638 goto out1; 639 err = register_filesystem(&minix_fs_type); 640 if (err) 641 goto out; 642 return 0; 643 out: 644 destroy_inodecache(); 645 out1: 646 return err; 647 } 648 649 static void __exit exit_minix_fs(void) 650 { 651 unregister_filesystem(&minix_fs_type); 652 destroy_inodecache(); 653 } 654 655 module_init(init_minix_fs) 656 module_exit(exit_minix_fs) 657 MODULE_LICENSE("GPL"); 658 659