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_i_callback(struct rcu_head *head) 72 { 73 struct inode *inode = container_of(head, struct inode, i_rcu); 74 INIT_LIST_HEAD(&inode->i_dentry); 75 kmem_cache_free(minix_inode_cachep, minix_i(inode)); 76 } 77 78 static void minix_destroy_inode(struct inode *inode) 79 { 80 call_rcu(&inode->i_rcu, minix_i_callback); 81 } 82 83 static void init_once(void *foo) 84 { 85 struct minix_inode_info *ei = (struct minix_inode_info *) foo; 86 87 inode_init_once(&ei->vfs_inode); 88 } 89 90 static int init_inodecache(void) 91 { 92 minix_inode_cachep = kmem_cache_create("minix_inode_cache", 93 sizeof(struct minix_inode_info), 94 0, (SLAB_RECLAIM_ACCOUNT| 95 SLAB_MEM_SPREAD), 96 init_once); 97 if (minix_inode_cachep == NULL) 98 return -ENOMEM; 99 return 0; 100 } 101 102 static void destroy_inodecache(void) 103 { 104 kmem_cache_destroy(minix_inode_cachep); 105 } 106 107 static const struct super_operations minix_sops = { 108 .alloc_inode = minix_alloc_inode, 109 .destroy_inode = minix_destroy_inode, 110 .write_inode = minix_write_inode, 111 .evict_inode = minix_evict_inode, 112 .put_super = minix_put_super, 113 .statfs = minix_statfs, 114 .remount_fs = minix_remount, 115 }; 116 117 static int minix_remount (struct super_block * sb, int * flags, char * data) 118 { 119 struct minix_sb_info * sbi = minix_sb(sb); 120 struct minix_super_block * ms; 121 122 ms = sbi->s_ms; 123 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) 124 return 0; 125 if (*flags & MS_RDONLY) { 126 if (ms->s_state & MINIX_VALID_FS || 127 !(sbi->s_mount_state & MINIX_VALID_FS)) 128 return 0; 129 /* Mounting a rw partition read-only. */ 130 if (sbi->s_version != MINIX_V3) 131 ms->s_state = sbi->s_mount_state; 132 mark_buffer_dirty(sbi->s_sbh); 133 } else { 134 /* Mount a partition which is read-only, read-write. */ 135 if (sbi->s_version != MINIX_V3) { 136 sbi->s_mount_state = ms->s_state; 137 ms->s_state &= ~MINIX_VALID_FS; 138 } else { 139 sbi->s_mount_state = MINIX_VALID_FS; 140 } 141 mark_buffer_dirty(sbi->s_sbh); 142 143 if (!(sbi->s_mount_state & MINIX_VALID_FS)) 144 printk("MINIX-fs warning: remounting unchecked fs, " 145 "running fsck is recommended\n"); 146 else if ((sbi->s_mount_state & MINIX_ERROR_FS)) 147 printk("MINIX-fs warning: remounting fs with errors, " 148 "running fsck is recommended\n"); 149 } 150 return 0; 151 } 152 153 static int minix_fill_super(struct super_block *s, void *data, int silent) 154 { 155 struct buffer_head *bh; 156 struct buffer_head **map; 157 struct minix_super_block *ms; 158 struct minix3_super_block *m3s = NULL; 159 unsigned long i, block; 160 struct inode *root_inode; 161 struct minix_sb_info *sbi; 162 int ret = -EINVAL; 163 164 sbi = kzalloc(sizeof(struct minix_sb_info), GFP_KERNEL); 165 if (!sbi) 166 return -ENOMEM; 167 s->s_fs_info = sbi; 168 169 BUILD_BUG_ON(32 != sizeof (struct minix_inode)); 170 BUILD_BUG_ON(64 != sizeof(struct minix2_inode)); 171 172 if (!sb_set_blocksize(s, BLOCK_SIZE)) 173 goto out_bad_hblock; 174 175 if (!(bh = sb_bread(s, 1))) 176 goto out_bad_sb; 177 178 ms = (struct minix_super_block *) bh->b_data; 179 sbi->s_ms = ms; 180 sbi->s_sbh = bh; 181 sbi->s_mount_state = ms->s_state; 182 sbi->s_ninodes = ms->s_ninodes; 183 sbi->s_nzones = ms->s_nzones; 184 sbi->s_imap_blocks = ms->s_imap_blocks; 185 sbi->s_zmap_blocks = ms->s_zmap_blocks; 186 sbi->s_firstdatazone = ms->s_firstdatazone; 187 sbi->s_log_zone_size = ms->s_log_zone_size; 188 sbi->s_max_size = ms->s_max_size; 189 s->s_magic = ms->s_magic; 190 if (s->s_magic == MINIX_SUPER_MAGIC) { 191 sbi->s_version = MINIX_V1; 192 sbi->s_dirsize = 16; 193 sbi->s_namelen = 14; 194 sbi->s_link_max = MINIX_LINK_MAX; 195 } else if (s->s_magic == MINIX_SUPER_MAGIC2) { 196 sbi->s_version = MINIX_V1; 197 sbi->s_dirsize = 32; 198 sbi->s_namelen = 30; 199 sbi->s_link_max = MINIX_LINK_MAX; 200 } else if (s->s_magic == MINIX2_SUPER_MAGIC) { 201 sbi->s_version = MINIX_V2; 202 sbi->s_nzones = ms->s_zones; 203 sbi->s_dirsize = 16; 204 sbi->s_namelen = 14; 205 sbi->s_link_max = MINIX2_LINK_MAX; 206 } else if (s->s_magic == MINIX2_SUPER_MAGIC2) { 207 sbi->s_version = MINIX_V2; 208 sbi->s_nzones = ms->s_zones; 209 sbi->s_dirsize = 32; 210 sbi->s_namelen = 30; 211 sbi->s_link_max = MINIX2_LINK_MAX; 212 } else if ( *(__u16 *)(bh->b_data + 24) == MINIX3_SUPER_MAGIC) { 213 m3s = (struct minix3_super_block *) bh->b_data; 214 s->s_magic = m3s->s_magic; 215 sbi->s_imap_blocks = m3s->s_imap_blocks; 216 sbi->s_zmap_blocks = m3s->s_zmap_blocks; 217 sbi->s_firstdatazone = m3s->s_firstdatazone; 218 sbi->s_log_zone_size = m3s->s_log_zone_size; 219 sbi->s_max_size = m3s->s_max_size; 220 sbi->s_ninodes = m3s->s_ninodes; 221 sbi->s_nzones = m3s->s_zones; 222 sbi->s_dirsize = 64; 223 sbi->s_namelen = 60; 224 sbi->s_version = MINIX_V3; 225 sbi->s_link_max = MINIX2_LINK_MAX; 226 sbi->s_mount_state = MINIX_VALID_FS; 227 sb_set_blocksize(s, m3s->s_blocksize); 228 } else 229 goto out_no_fs; 230 231 /* 232 * Allocate the buffer map to keep the superblock small. 233 */ 234 if (sbi->s_imap_blocks == 0 || sbi->s_zmap_blocks == 0) 235 goto out_illegal_sb; 236 i = (sbi->s_imap_blocks + sbi->s_zmap_blocks) * sizeof(bh); 237 map = kzalloc(i, GFP_KERNEL); 238 if (!map) 239 goto out_no_map; 240 sbi->s_imap = &map[0]; 241 sbi->s_zmap = &map[sbi->s_imap_blocks]; 242 243 block=2; 244 for (i=0 ; i < sbi->s_imap_blocks ; i++) { 245 if (!(sbi->s_imap[i]=sb_bread(s, block))) 246 goto out_no_bitmap; 247 block++; 248 } 249 for (i=0 ; i < sbi->s_zmap_blocks ; i++) { 250 if (!(sbi->s_zmap[i]=sb_bread(s, block))) 251 goto out_no_bitmap; 252 block++; 253 } 254 255 minix_set_bit(0,sbi->s_imap[0]->b_data); 256 minix_set_bit(0,sbi->s_zmap[0]->b_data); 257 258 /* set up enough so that it can read an inode */ 259 s->s_op = &minix_sops; 260 root_inode = minix_iget(s, MINIX_ROOT_INO); 261 if (IS_ERR(root_inode)) { 262 ret = PTR_ERR(root_inode); 263 goto out_no_root; 264 } 265 266 ret = -ENOMEM; 267 s->s_root = d_alloc_root(root_inode); 268 if (!s->s_root) 269 goto out_iput; 270 271 if (!(s->s_flags & MS_RDONLY)) { 272 if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */ 273 ms->s_state &= ~MINIX_VALID_FS; 274 mark_buffer_dirty(bh); 275 } 276 if (!(sbi->s_mount_state & MINIX_VALID_FS)) 277 printk("MINIX-fs: mounting unchecked file system, " 278 "running fsck is recommended\n"); 279 else if (sbi->s_mount_state & MINIX_ERROR_FS) 280 printk("MINIX-fs: mounting file system with errors, " 281 "running fsck is recommended\n"); 282 return 0; 283 284 out_iput: 285 iput(root_inode); 286 goto out_freemap; 287 288 out_no_root: 289 if (!silent) 290 printk("MINIX-fs: get root inode failed\n"); 291 goto out_freemap; 292 293 out_no_bitmap: 294 printk("MINIX-fs: bad superblock or unable to read bitmaps\n"); 295 out_freemap: 296 for (i = 0; i < sbi->s_imap_blocks; i++) 297 brelse(sbi->s_imap[i]); 298 for (i = 0; i < sbi->s_zmap_blocks; i++) 299 brelse(sbi->s_zmap[i]); 300 kfree(sbi->s_imap); 301 goto out_release; 302 303 out_no_map: 304 ret = -ENOMEM; 305 if (!silent) 306 printk("MINIX-fs: can't allocate map\n"); 307 goto out_release; 308 309 out_illegal_sb: 310 if (!silent) 311 printk("MINIX-fs: bad superblock\n"); 312 goto out_release; 313 314 out_no_fs: 315 if (!silent) 316 printk("VFS: Can't find a Minix filesystem V1 | V2 | V3 " 317 "on device %s.\n", s->s_id); 318 out_release: 319 brelse(bh); 320 goto out; 321 322 out_bad_hblock: 323 printk("MINIX-fs: blocksize too small for device\n"); 324 goto out; 325 326 out_bad_sb: 327 printk("MINIX-fs: unable to read superblock\n"); 328 out: 329 s->s_fs_info = NULL; 330 kfree(sbi); 331 return ret; 332 } 333 334 static int minix_statfs(struct dentry *dentry, struct kstatfs *buf) 335 { 336 struct super_block *sb = dentry->d_sb; 337 struct minix_sb_info *sbi = minix_sb(sb); 338 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 339 buf->f_type = sb->s_magic; 340 buf->f_bsize = sb->s_blocksize; 341 buf->f_blocks = (sbi->s_nzones - sbi->s_firstdatazone) << sbi->s_log_zone_size; 342 buf->f_bfree = minix_count_free_blocks(sbi); 343 buf->f_bavail = buf->f_bfree; 344 buf->f_files = sbi->s_ninodes; 345 buf->f_ffree = minix_count_free_inodes(sbi); 346 buf->f_namelen = sbi->s_namelen; 347 buf->f_fsid.val[0] = (u32)id; 348 buf->f_fsid.val[1] = (u32)(id >> 32); 349 350 return 0; 351 } 352 353 static int minix_get_block(struct inode *inode, sector_t block, 354 struct buffer_head *bh_result, int create) 355 { 356 if (INODE_VERSION(inode) == MINIX_V1) 357 return V1_minix_get_block(inode, block, bh_result, create); 358 else 359 return V2_minix_get_block(inode, block, bh_result, create); 360 } 361 362 static int minix_writepage(struct page *page, struct writeback_control *wbc) 363 { 364 return block_write_full_page(page, minix_get_block, wbc); 365 } 366 367 static int minix_readpage(struct file *file, struct page *page) 368 { 369 return block_read_full_page(page,minix_get_block); 370 } 371 372 int minix_prepare_chunk(struct page *page, loff_t pos, unsigned len) 373 { 374 return __block_write_begin(page, pos, len, minix_get_block); 375 } 376 377 static int minix_write_begin(struct file *file, struct address_space *mapping, 378 loff_t pos, unsigned len, unsigned flags, 379 struct page **pagep, void **fsdata) 380 { 381 int ret; 382 383 ret = block_write_begin(mapping, pos, len, flags, pagep, 384 minix_get_block); 385 if (unlikely(ret)) { 386 loff_t isize = mapping->host->i_size; 387 if (pos + len > isize) 388 vmtruncate(mapping->host, isize); 389 } 390 391 return ret; 392 } 393 394 static sector_t minix_bmap(struct address_space *mapping, sector_t block) 395 { 396 return generic_block_bmap(mapping,block,minix_get_block); 397 } 398 399 static const struct address_space_operations minix_aops = { 400 .readpage = minix_readpage, 401 .writepage = minix_writepage, 402 .write_begin = minix_write_begin, 403 .write_end = generic_write_end, 404 .bmap = minix_bmap 405 }; 406 407 static const struct inode_operations minix_symlink_inode_operations = { 408 .readlink = generic_readlink, 409 .follow_link = page_follow_link_light, 410 .put_link = page_put_link, 411 .getattr = minix_getattr, 412 }; 413 414 void minix_set_inode(struct inode *inode, dev_t rdev) 415 { 416 if (S_ISREG(inode->i_mode)) { 417 inode->i_op = &minix_file_inode_operations; 418 inode->i_fop = &minix_file_operations; 419 inode->i_mapping->a_ops = &minix_aops; 420 } else if (S_ISDIR(inode->i_mode)) { 421 inode->i_op = &minix_dir_inode_operations; 422 inode->i_fop = &minix_dir_operations; 423 inode->i_mapping->a_ops = &minix_aops; 424 } else if (S_ISLNK(inode->i_mode)) { 425 inode->i_op = &minix_symlink_inode_operations; 426 inode->i_mapping->a_ops = &minix_aops; 427 } else 428 init_special_inode(inode, inode->i_mode, rdev); 429 } 430 431 /* 432 * The minix V1 function to read an inode. 433 */ 434 static struct inode *V1_minix_iget(struct inode *inode) 435 { 436 struct buffer_head * bh; 437 struct minix_inode * raw_inode; 438 struct minix_inode_info *minix_inode = minix_i(inode); 439 int i; 440 441 raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); 442 if (!raw_inode) { 443 iget_failed(inode); 444 return ERR_PTR(-EIO); 445 } 446 inode->i_mode = raw_inode->i_mode; 447 inode->i_uid = (uid_t)raw_inode->i_uid; 448 inode->i_gid = (gid_t)raw_inode->i_gid; 449 inode->i_nlink = raw_inode->i_nlinks; 450 inode->i_size = raw_inode->i_size; 451 inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = raw_inode->i_time; 452 inode->i_mtime.tv_nsec = 0; 453 inode->i_atime.tv_nsec = 0; 454 inode->i_ctime.tv_nsec = 0; 455 inode->i_blocks = 0; 456 for (i = 0; i < 9; i++) 457 minix_inode->u.i1_data[i] = raw_inode->i_zone[i]; 458 minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); 459 brelse(bh); 460 unlock_new_inode(inode); 461 return inode; 462 } 463 464 /* 465 * The minix V2 function to read an inode. 466 */ 467 static struct inode *V2_minix_iget(struct inode *inode) 468 { 469 struct buffer_head * bh; 470 struct minix2_inode * raw_inode; 471 struct minix_inode_info *minix_inode = minix_i(inode); 472 int i; 473 474 raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); 475 if (!raw_inode) { 476 iget_failed(inode); 477 return ERR_PTR(-EIO); 478 } 479 inode->i_mode = raw_inode->i_mode; 480 inode->i_uid = (uid_t)raw_inode->i_uid; 481 inode->i_gid = (gid_t)raw_inode->i_gid; 482 inode->i_nlink = raw_inode->i_nlinks; 483 inode->i_size = raw_inode->i_size; 484 inode->i_mtime.tv_sec = raw_inode->i_mtime; 485 inode->i_atime.tv_sec = raw_inode->i_atime; 486 inode->i_ctime.tv_sec = raw_inode->i_ctime; 487 inode->i_mtime.tv_nsec = 0; 488 inode->i_atime.tv_nsec = 0; 489 inode->i_ctime.tv_nsec = 0; 490 inode->i_blocks = 0; 491 for (i = 0; i < 10; i++) 492 minix_inode->u.i2_data[i] = raw_inode->i_zone[i]; 493 minix_set_inode(inode, old_decode_dev(raw_inode->i_zone[0])); 494 brelse(bh); 495 unlock_new_inode(inode); 496 return inode; 497 } 498 499 /* 500 * The global function to read an inode. 501 */ 502 struct inode *minix_iget(struct super_block *sb, unsigned long ino) 503 { 504 struct inode *inode; 505 506 inode = iget_locked(sb, ino); 507 if (!inode) 508 return ERR_PTR(-ENOMEM); 509 if (!(inode->i_state & I_NEW)) 510 return inode; 511 512 if (INODE_VERSION(inode) == MINIX_V1) 513 return V1_minix_iget(inode); 514 else 515 return V2_minix_iget(inode); 516 } 517 518 /* 519 * The minix V1 function to synchronize an inode. 520 */ 521 static struct buffer_head * V1_minix_update_inode(struct inode * inode) 522 { 523 struct buffer_head * bh; 524 struct minix_inode * raw_inode; 525 struct minix_inode_info *minix_inode = minix_i(inode); 526 int i; 527 528 raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); 529 if (!raw_inode) 530 return NULL; 531 raw_inode->i_mode = inode->i_mode; 532 raw_inode->i_uid = fs_high2lowuid(inode->i_uid); 533 raw_inode->i_gid = fs_high2lowgid(inode->i_gid); 534 raw_inode->i_nlinks = inode->i_nlink; 535 raw_inode->i_size = inode->i_size; 536 raw_inode->i_time = inode->i_mtime.tv_sec; 537 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 538 raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); 539 else for (i = 0; i < 9; i++) 540 raw_inode->i_zone[i] = minix_inode->u.i1_data[i]; 541 mark_buffer_dirty(bh); 542 return bh; 543 } 544 545 /* 546 * The minix V2 function to synchronize an inode. 547 */ 548 static struct buffer_head * V2_minix_update_inode(struct inode * inode) 549 { 550 struct buffer_head * bh; 551 struct minix2_inode * raw_inode; 552 struct minix_inode_info *minix_inode = minix_i(inode); 553 int i; 554 555 raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); 556 if (!raw_inode) 557 return NULL; 558 raw_inode->i_mode = inode->i_mode; 559 raw_inode->i_uid = fs_high2lowuid(inode->i_uid); 560 raw_inode->i_gid = fs_high2lowgid(inode->i_gid); 561 raw_inode->i_nlinks = inode->i_nlink; 562 raw_inode->i_size = inode->i_size; 563 raw_inode->i_mtime = inode->i_mtime.tv_sec; 564 raw_inode->i_atime = inode->i_atime.tv_sec; 565 raw_inode->i_ctime = inode->i_ctime.tv_sec; 566 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 567 raw_inode->i_zone[0] = old_encode_dev(inode->i_rdev); 568 else for (i = 0; i < 10; i++) 569 raw_inode->i_zone[i] = minix_inode->u.i2_data[i]; 570 mark_buffer_dirty(bh); 571 return bh; 572 } 573 574 static int minix_write_inode(struct inode *inode, struct writeback_control *wbc) 575 { 576 int err = 0; 577 struct buffer_head *bh; 578 579 if (INODE_VERSION(inode) == MINIX_V1) 580 bh = V1_minix_update_inode(inode); 581 else 582 bh = V2_minix_update_inode(inode); 583 if (!bh) 584 return -EIO; 585 if (wbc->sync_mode == WB_SYNC_ALL && buffer_dirty(bh)) { 586 sync_dirty_buffer(bh); 587 if (buffer_req(bh) && !buffer_uptodate(bh)) { 588 printk("IO error syncing minix inode [%s:%08lx]\n", 589 inode->i_sb->s_id, inode->i_ino); 590 err = -EIO; 591 } 592 } 593 brelse (bh); 594 return err; 595 } 596 597 int minix_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) 598 { 599 struct super_block *sb = dentry->d_sb; 600 generic_fillattr(dentry->d_inode, stat); 601 if (INODE_VERSION(dentry->d_inode) == MINIX_V1) 602 stat->blocks = (BLOCK_SIZE / 512) * V1_minix_blocks(stat->size, sb); 603 else 604 stat->blocks = (sb->s_blocksize / 512) * V2_minix_blocks(stat->size, sb); 605 stat->blksize = sb->s_blocksize; 606 return 0; 607 } 608 609 /* 610 * The function that is called for file truncation. 611 */ 612 void minix_truncate(struct inode * inode) 613 { 614 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))) 615 return; 616 if (INODE_VERSION(inode) == MINIX_V1) 617 V1_minix_truncate(inode); 618 else 619 V2_minix_truncate(inode); 620 } 621 622 static struct dentry *minix_mount(struct file_system_type *fs_type, 623 int flags, const char *dev_name, void *data) 624 { 625 return mount_bdev(fs_type, flags, dev_name, data, minix_fill_super); 626 } 627 628 static struct file_system_type minix_fs_type = { 629 .owner = THIS_MODULE, 630 .name = "minix", 631 .mount = minix_mount, 632 .kill_sb = kill_block_super, 633 .fs_flags = FS_REQUIRES_DEV, 634 }; 635 636 static int __init init_minix_fs(void) 637 { 638 int err = init_inodecache(); 639 if (err) 640 goto out1; 641 err = register_filesystem(&minix_fs_type); 642 if (err) 643 goto out; 644 return 0; 645 out: 646 destroy_inodecache(); 647 out1: 648 return err; 649 } 650 651 static void __exit exit_minix_fs(void) 652 { 653 unregister_filesystem(&minix_fs_type); 654 destroy_inodecache(); 655 } 656 657 module_init(init_minix_fs) 658 module_exit(exit_minix_fs) 659 MODULE_LICENSE("GPL"); 660 661