1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/fs/hfsplus/super.c 4 * 5 * Copyright (C) 2001 6 * Brad Boyer (flar@allandria.com) 7 * (C) 2003 Ardis Technologies <roman@ardistech.com> 8 * 9 */ 10 11 #include <linux/module.h> 12 #include <linux/init.h> 13 #include <linux/pagemap.h> 14 #include <linux/blkdev.h> 15 #include <linux/backing-dev.h> 16 #include <linux/fs.h> 17 #include <linux/fs_context.h> 18 #include <linux/slab.h> 19 #include <linux/vfs.h> 20 #include <linux/nls.h> 21 22 static struct inode *hfsplus_alloc_inode(struct super_block *sb); 23 static void hfsplus_free_inode(struct inode *inode); 24 25 #include "hfsplus_fs.h" 26 #include "xattr.h" 27 28 static int hfsplus_system_read_inode(struct inode *inode) 29 { 30 struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr; 31 32 switch (inode->i_ino) { 33 case HFSPLUS_EXT_CNID: 34 hfsplus_inode_read_fork(inode, &vhdr->ext_file); 35 inode->i_mapping->a_ops = &hfsplus_btree_aops; 36 break; 37 case HFSPLUS_CAT_CNID: 38 hfsplus_inode_read_fork(inode, &vhdr->cat_file); 39 inode->i_mapping->a_ops = &hfsplus_btree_aops; 40 break; 41 case HFSPLUS_ALLOC_CNID: 42 hfsplus_inode_read_fork(inode, &vhdr->alloc_file); 43 inode->i_mapping->a_ops = &hfsplus_aops; 44 break; 45 case HFSPLUS_START_CNID: 46 hfsplus_inode_read_fork(inode, &vhdr->start_file); 47 break; 48 case HFSPLUS_ATTR_CNID: 49 hfsplus_inode_read_fork(inode, &vhdr->attr_file); 50 inode->i_mapping->a_ops = &hfsplus_btree_aops; 51 break; 52 default: 53 return -EIO; 54 } 55 56 return 0; 57 } 58 59 struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) 60 { 61 struct hfs_find_data fd; 62 struct inode *inode; 63 int err; 64 65 inode = iget_locked(sb, ino); 66 if (!inode) 67 return ERR_PTR(-ENOMEM); 68 if (!(inode->i_state & I_NEW)) 69 return inode; 70 71 INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list); 72 spin_lock_init(&HFSPLUS_I(inode)->open_dir_lock); 73 mutex_init(&HFSPLUS_I(inode)->extents_lock); 74 HFSPLUS_I(inode)->flags = 0; 75 HFSPLUS_I(inode)->extent_state = 0; 76 HFSPLUS_I(inode)->rsrc_inode = NULL; 77 atomic_set(&HFSPLUS_I(inode)->opencnt, 0); 78 79 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || 80 inode->i_ino == HFSPLUS_ROOT_CNID) { 81 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd); 82 if (!err) { 83 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); 84 if (!err) 85 err = hfsplus_cat_read_inode(inode, &fd); 86 hfs_find_exit(&fd); 87 } 88 } else { 89 err = hfsplus_system_read_inode(inode); 90 } 91 92 if (err) { 93 iget_failed(inode); 94 return ERR_PTR(err); 95 } 96 97 unlock_new_inode(inode); 98 return inode; 99 } 100 101 static int hfsplus_system_write_inode(struct inode *inode) 102 { 103 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); 104 struct hfsplus_vh *vhdr = sbi->s_vhdr; 105 struct hfsplus_fork_raw *fork; 106 struct hfs_btree *tree = NULL; 107 108 switch (inode->i_ino) { 109 case HFSPLUS_EXT_CNID: 110 fork = &vhdr->ext_file; 111 tree = sbi->ext_tree; 112 break; 113 case HFSPLUS_CAT_CNID: 114 fork = &vhdr->cat_file; 115 tree = sbi->cat_tree; 116 break; 117 case HFSPLUS_ALLOC_CNID: 118 fork = &vhdr->alloc_file; 119 break; 120 case HFSPLUS_START_CNID: 121 fork = &vhdr->start_file; 122 break; 123 case HFSPLUS_ATTR_CNID: 124 fork = &vhdr->attr_file; 125 tree = sbi->attr_tree; 126 break; 127 default: 128 return -EIO; 129 } 130 131 if (fork->total_size != cpu_to_be64(inode->i_size)) { 132 set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags); 133 hfsplus_mark_mdb_dirty(inode->i_sb); 134 } 135 hfsplus_inode_write_fork(inode, fork); 136 if (tree) { 137 int err = hfs_btree_write(tree); 138 139 if (err) { 140 pr_err("b-tree write err: %d, ino %lu\n", 141 err, inode->i_ino); 142 return err; 143 } 144 } 145 return 0; 146 } 147 148 static int hfsplus_write_inode(struct inode *inode, 149 struct writeback_control *wbc) 150 { 151 int err; 152 153 hfs_dbg(INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); 154 155 err = hfsplus_ext_write_extent(inode); 156 if (err) 157 return err; 158 159 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || 160 inode->i_ino == HFSPLUS_ROOT_CNID) 161 return hfsplus_cat_write_inode(inode); 162 else 163 return hfsplus_system_write_inode(inode); 164 } 165 166 static void hfsplus_evict_inode(struct inode *inode) 167 { 168 hfs_dbg(INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino); 169 truncate_inode_pages_final(&inode->i_data); 170 clear_inode(inode); 171 if (HFSPLUS_IS_RSRC(inode)) { 172 HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL; 173 iput(HFSPLUS_I(inode)->rsrc_inode); 174 } 175 } 176 177 static int hfsplus_sync_fs(struct super_block *sb, int wait) 178 { 179 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 180 struct hfsplus_vh *vhdr = sbi->s_vhdr; 181 int write_backup = 0; 182 int error, error2; 183 184 if (!wait) 185 return 0; 186 187 hfs_dbg(SUPER, "hfsplus_sync_fs\n"); 188 189 /* 190 * Explicitly write out the special metadata inodes. 191 * 192 * While these special inodes are marked as hashed and written 193 * out peridocically by the flusher threads we redirty them 194 * during writeout of normal inodes, and thus the life lock 195 * prevents us from getting the latest state to disk. 196 */ 197 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); 198 error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); 199 if (!error) 200 error = error2; 201 if (sbi->attr_tree) { 202 error2 = 203 filemap_write_and_wait(sbi->attr_tree->inode->i_mapping); 204 if (!error) 205 error = error2; 206 } 207 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); 208 if (!error) 209 error = error2; 210 211 mutex_lock(&sbi->vh_mutex); 212 mutex_lock(&sbi->alloc_mutex); 213 vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); 214 vhdr->next_cnid = cpu_to_be32(sbi->next_cnid); 215 vhdr->folder_count = cpu_to_be32(sbi->folder_count); 216 vhdr->file_count = cpu_to_be32(sbi->file_count); 217 218 if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) { 219 memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr)); 220 write_backup = 1; 221 } 222 223 error2 = hfsplus_submit_bio(sb, 224 sbi->part_start + HFSPLUS_VOLHEAD_SECTOR, 225 sbi->s_vhdr_buf, NULL, REQ_OP_WRITE); 226 if (!error) 227 error = error2; 228 if (!write_backup) 229 goto out; 230 231 error2 = hfsplus_submit_bio(sb, 232 sbi->part_start + sbi->sect_count - 2, 233 sbi->s_backup_vhdr_buf, NULL, REQ_OP_WRITE); 234 if (!error) 235 error2 = error; 236 out: 237 mutex_unlock(&sbi->alloc_mutex); 238 mutex_unlock(&sbi->vh_mutex); 239 240 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) 241 blkdev_issue_flush(sb->s_bdev); 242 243 return error; 244 } 245 246 static void delayed_sync_fs(struct work_struct *work) 247 { 248 int err; 249 struct hfsplus_sb_info *sbi; 250 251 sbi = container_of(work, struct hfsplus_sb_info, sync_work.work); 252 253 spin_lock(&sbi->work_lock); 254 sbi->work_queued = 0; 255 spin_unlock(&sbi->work_lock); 256 257 err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1); 258 if (err) 259 pr_err("delayed sync fs err %d\n", err); 260 } 261 262 void hfsplus_mark_mdb_dirty(struct super_block *sb) 263 { 264 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 265 unsigned long delay; 266 267 if (sb_rdonly(sb)) 268 return; 269 270 spin_lock(&sbi->work_lock); 271 if (!sbi->work_queued) { 272 delay = msecs_to_jiffies(dirty_writeback_interval * 10); 273 queue_delayed_work(system_long_wq, &sbi->sync_work, delay); 274 sbi->work_queued = 1; 275 } 276 spin_unlock(&sbi->work_lock); 277 } 278 279 static void delayed_free(struct rcu_head *p) 280 { 281 struct hfsplus_sb_info *sbi = container_of(p, struct hfsplus_sb_info, rcu); 282 283 unload_nls(sbi->nls); 284 kfree(sbi); 285 } 286 287 static void hfsplus_put_super(struct super_block *sb) 288 { 289 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 290 291 hfs_dbg(SUPER, "hfsplus_put_super\n"); 292 293 cancel_delayed_work_sync(&sbi->sync_work); 294 295 if (!sb_rdonly(sb) && sbi->s_vhdr) { 296 struct hfsplus_vh *vhdr = sbi->s_vhdr; 297 298 vhdr->modify_date = hfsp_now2mt(); 299 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); 300 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); 301 302 hfsplus_sync_fs(sb, 1); 303 } 304 305 iput(sbi->alloc_file); 306 iput(sbi->hidden_dir); 307 hfs_btree_close(sbi->attr_tree); 308 hfs_btree_close(sbi->cat_tree); 309 hfs_btree_close(sbi->ext_tree); 310 kfree(sbi->s_vhdr_buf); 311 kfree(sbi->s_backup_vhdr_buf); 312 call_rcu(&sbi->rcu, delayed_free); 313 } 314 315 static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) 316 { 317 struct super_block *sb = dentry->d_sb; 318 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 319 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 320 321 buf->f_type = HFSPLUS_SUPER_MAGIC; 322 buf->f_bsize = sb->s_blocksize; 323 buf->f_blocks = sbi->total_blocks << sbi->fs_shift; 324 buf->f_bfree = sbi->free_blocks << sbi->fs_shift; 325 buf->f_bavail = buf->f_bfree; 326 buf->f_files = 0xFFFFFFFF; 327 buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid; 328 buf->f_fsid = u64_to_fsid(id); 329 buf->f_namelen = HFSPLUS_MAX_STRLEN; 330 331 return 0; 332 } 333 334 static int hfsplus_reconfigure(struct fs_context *fc) 335 { 336 struct super_block *sb = fc->root->d_sb; 337 338 sync_filesystem(sb); 339 if ((bool)(fc->sb_flags & SB_RDONLY) == sb_rdonly(sb)) 340 return 0; 341 if (!(fc->sb_flags & SB_RDONLY)) { 342 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 343 struct hfsplus_vh *vhdr = sbi->s_vhdr; 344 345 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { 346 pr_warn("filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. leaving read-only.\n"); 347 sb->s_flags |= SB_RDONLY; 348 fc->sb_flags |= SB_RDONLY; 349 } else if (test_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { 350 /* nothing */ 351 } else if (vhdr->attributes & 352 cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { 353 pr_warn("filesystem is marked locked, leaving read-only.\n"); 354 sb->s_flags |= SB_RDONLY; 355 fc->sb_flags |= SB_RDONLY; 356 } else if (vhdr->attributes & 357 cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { 358 pr_warn("filesystem is marked journaled, leaving read-only.\n"); 359 sb->s_flags |= SB_RDONLY; 360 fc->sb_flags |= SB_RDONLY; 361 } 362 } 363 return 0; 364 } 365 366 static const struct super_operations hfsplus_sops = { 367 .alloc_inode = hfsplus_alloc_inode, 368 .free_inode = hfsplus_free_inode, 369 .write_inode = hfsplus_write_inode, 370 .evict_inode = hfsplus_evict_inode, 371 .put_super = hfsplus_put_super, 372 .sync_fs = hfsplus_sync_fs, 373 .statfs = hfsplus_statfs, 374 .show_options = hfsplus_show_options, 375 }; 376 377 static int hfsplus_fill_super(struct super_block *sb, struct fs_context *fc) 378 { 379 struct hfsplus_vh *vhdr; 380 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 381 hfsplus_cat_entry entry; 382 struct hfs_find_data fd; 383 struct inode *root, *inode; 384 struct qstr str; 385 struct nls_table *nls; 386 u64 last_fs_block, last_fs_page; 387 int silent = fc->sb_flags & SB_SILENT; 388 int err; 389 390 mutex_init(&sbi->alloc_mutex); 391 mutex_init(&sbi->vh_mutex); 392 spin_lock_init(&sbi->work_lock); 393 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); 394 395 err = -EINVAL; 396 if (!sbi->nls) { 397 /* try utf8 first, as this is the old default behaviour */ 398 sbi->nls = load_nls("utf8"); 399 if (!sbi->nls) 400 sbi->nls = load_nls_default(); 401 } 402 403 /* temporarily use utf8 to correctly find the hidden dir below */ 404 nls = sbi->nls; 405 sbi->nls = load_nls("utf8"); 406 if (!sbi->nls) { 407 pr_err("unable to load nls for utf8\n"); 408 goto out_unload_nls; 409 } 410 411 /* Grab the volume header */ 412 if (hfsplus_read_wrapper(sb)) { 413 if (!silent) 414 pr_warn("unable to find HFS+ superblock\n"); 415 goto out_unload_nls; 416 } 417 vhdr = sbi->s_vhdr; 418 419 /* Copy parts of the volume header into the superblock */ 420 sb->s_magic = HFSPLUS_VOLHEAD_SIG; 421 if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || 422 be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { 423 pr_err("wrong filesystem version\n"); 424 goto out_free_vhdr; 425 } 426 sbi->total_blocks = be32_to_cpu(vhdr->total_blocks); 427 sbi->free_blocks = be32_to_cpu(vhdr->free_blocks); 428 sbi->next_cnid = be32_to_cpu(vhdr->next_cnid); 429 sbi->file_count = be32_to_cpu(vhdr->file_count); 430 sbi->folder_count = be32_to_cpu(vhdr->folder_count); 431 sbi->data_clump_blocks = 432 be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift; 433 if (!sbi->data_clump_blocks) 434 sbi->data_clump_blocks = 1; 435 sbi->rsrc_clump_blocks = 436 be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift; 437 if (!sbi->rsrc_clump_blocks) 438 sbi->rsrc_clump_blocks = 1; 439 440 err = -EFBIG; 441 last_fs_block = sbi->total_blocks - 1; 442 last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >> 443 PAGE_SHIFT; 444 445 if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) || 446 (last_fs_page > (pgoff_t)(~0ULL))) { 447 pr_err("filesystem size too large\n"); 448 goto out_free_vhdr; 449 } 450 451 /* Set up operations so we can load metadata */ 452 sb->s_op = &hfsplus_sops; 453 sb->s_maxbytes = MAX_LFS_FILESIZE; 454 455 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { 456 pr_warn("Filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. mounting read-only.\n"); 457 sb->s_flags |= SB_RDONLY; 458 } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { 459 /* nothing */ 460 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { 461 pr_warn("Filesystem is marked locked, mounting read-only.\n"); 462 sb->s_flags |= SB_RDONLY; 463 } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && 464 !sb_rdonly(sb)) { 465 pr_warn("write access to a journaled filesystem is not supported, use the force option at your own risk, mounting read-only.\n"); 466 sb->s_flags |= SB_RDONLY; 467 } 468 469 err = -EINVAL; 470 471 /* Load metadata objects (B*Trees) */ 472 sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); 473 if (!sbi->ext_tree) { 474 pr_err("failed to load extents file\n"); 475 goto out_free_vhdr; 476 } 477 sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); 478 if (!sbi->cat_tree) { 479 pr_err("failed to load catalog file\n"); 480 goto out_close_ext_tree; 481 } 482 atomic_set(&sbi->attr_tree_state, HFSPLUS_EMPTY_ATTR_TREE); 483 if (vhdr->attr_file.total_blocks != 0) { 484 sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID); 485 if (!sbi->attr_tree) { 486 pr_err("failed to load attributes file\n"); 487 goto out_close_cat_tree; 488 } 489 atomic_set(&sbi->attr_tree_state, HFSPLUS_VALID_ATTR_TREE); 490 } 491 sb->s_xattr = hfsplus_xattr_handlers; 492 493 inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); 494 if (IS_ERR(inode)) { 495 pr_err("failed to load allocation file\n"); 496 err = PTR_ERR(inode); 497 goto out_close_attr_tree; 498 } 499 sbi->alloc_file = inode; 500 501 /* Load the root directory */ 502 root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); 503 if (IS_ERR(root)) { 504 pr_err("failed to load root directory\n"); 505 err = PTR_ERR(root); 506 goto out_put_alloc_file; 507 } 508 509 set_default_d_op(sb, &hfsplus_dentry_operations); 510 sb->s_root = d_make_root(root); 511 if (!sb->s_root) { 512 err = -ENOMEM; 513 goto out_put_alloc_file; 514 } 515 516 str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; 517 str.name = HFSP_HIDDENDIR_NAME; 518 err = hfs_find_init(sbi->cat_tree, &fd); 519 if (err) 520 goto out_put_root; 521 err = hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); 522 if (unlikely(err < 0)) 523 goto out_put_root; 524 if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { 525 hfs_find_exit(&fd); 526 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) { 527 err = -EINVAL; 528 goto out_put_root; 529 } 530 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); 531 if (IS_ERR(inode)) { 532 err = PTR_ERR(inode); 533 goto out_put_root; 534 } 535 sbi->hidden_dir = inode; 536 } else 537 hfs_find_exit(&fd); 538 539 if (!sb_rdonly(sb)) { 540 /* 541 * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused 542 * all three are registered with Apple for our use 543 */ 544 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); 545 vhdr->modify_date = hfsp_now2mt(); 546 be32_add_cpu(&vhdr->write_count, 1); 547 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); 548 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); 549 hfsplus_sync_fs(sb, 1); 550 551 if (!sbi->hidden_dir) { 552 mutex_lock(&sbi->vh_mutex); 553 sbi->hidden_dir = hfsplus_new_inode(sb, root, S_IFDIR); 554 if (!sbi->hidden_dir) { 555 mutex_unlock(&sbi->vh_mutex); 556 err = -ENOMEM; 557 goto out_put_root; 558 } 559 err = hfsplus_create_cat(sbi->hidden_dir->i_ino, root, 560 &str, sbi->hidden_dir); 561 if (err) { 562 mutex_unlock(&sbi->vh_mutex); 563 goto out_put_hidden_dir; 564 } 565 566 err = hfsplus_init_security(sbi->hidden_dir, 567 root, &str); 568 if (err == -EOPNOTSUPP) 569 err = 0; /* Operation is not supported. */ 570 else if (err) { 571 /* 572 * Try to delete anyway without 573 * error analysis. 574 */ 575 hfsplus_delete_cat(sbi->hidden_dir->i_ino, 576 root, &str); 577 mutex_unlock(&sbi->vh_mutex); 578 goto out_put_hidden_dir; 579 } 580 581 mutex_unlock(&sbi->vh_mutex); 582 hfsplus_mark_inode_dirty(sbi->hidden_dir, 583 HFSPLUS_I_CAT_DIRTY); 584 } 585 } 586 587 unload_nls(sbi->nls); 588 sbi->nls = nls; 589 return 0; 590 591 out_put_hidden_dir: 592 cancel_delayed_work_sync(&sbi->sync_work); 593 iput(sbi->hidden_dir); 594 out_put_root: 595 dput(sb->s_root); 596 sb->s_root = NULL; 597 out_put_alloc_file: 598 iput(sbi->alloc_file); 599 out_close_attr_tree: 600 hfs_btree_close(sbi->attr_tree); 601 out_close_cat_tree: 602 hfs_btree_close(sbi->cat_tree); 603 out_close_ext_tree: 604 hfs_btree_close(sbi->ext_tree); 605 out_free_vhdr: 606 kfree(sbi->s_vhdr_buf); 607 kfree(sbi->s_backup_vhdr_buf); 608 out_unload_nls: 609 unload_nls(sbi->nls); 610 unload_nls(nls); 611 kfree(sbi); 612 return err; 613 } 614 615 MODULE_AUTHOR("Brad Boyer"); 616 MODULE_DESCRIPTION("Extended Macintosh Filesystem"); 617 MODULE_LICENSE("GPL"); 618 619 static struct kmem_cache *hfsplus_inode_cachep; 620 621 static struct inode *hfsplus_alloc_inode(struct super_block *sb) 622 { 623 struct hfsplus_inode_info *i; 624 625 i = alloc_inode_sb(sb, hfsplus_inode_cachep, GFP_KERNEL); 626 return i ? &i->vfs_inode : NULL; 627 } 628 629 static void hfsplus_free_inode(struct inode *inode) 630 { 631 kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode)); 632 } 633 634 #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) 635 636 static int hfsplus_get_tree(struct fs_context *fc) 637 { 638 return get_tree_bdev(fc, hfsplus_fill_super); 639 } 640 641 static void hfsplus_free_fc(struct fs_context *fc) 642 { 643 kfree(fc->s_fs_info); 644 } 645 646 static const struct fs_context_operations hfsplus_context_ops = { 647 .parse_param = hfsplus_parse_param, 648 .get_tree = hfsplus_get_tree, 649 .reconfigure = hfsplus_reconfigure, 650 .free = hfsplus_free_fc, 651 }; 652 653 static int hfsplus_init_fs_context(struct fs_context *fc) 654 { 655 struct hfsplus_sb_info *sbi; 656 657 sbi = kzalloc(sizeof(struct hfsplus_sb_info), GFP_KERNEL); 658 if (!sbi) 659 return -ENOMEM; 660 661 if (fc->purpose != FS_CONTEXT_FOR_RECONFIGURE) 662 hfsplus_fill_defaults(sbi); 663 664 fc->s_fs_info = sbi; 665 fc->ops = &hfsplus_context_ops; 666 667 return 0; 668 } 669 670 static struct file_system_type hfsplus_fs_type = { 671 .owner = THIS_MODULE, 672 .name = "hfsplus", 673 .kill_sb = kill_block_super, 674 .fs_flags = FS_REQUIRES_DEV, 675 .init_fs_context = hfsplus_init_fs_context, 676 }; 677 MODULE_ALIAS_FS("hfsplus"); 678 679 static void hfsplus_init_once(void *p) 680 { 681 struct hfsplus_inode_info *i = p; 682 683 inode_init_once(&i->vfs_inode); 684 } 685 686 static int __init init_hfsplus_fs(void) 687 { 688 int err; 689 690 hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", 691 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, 692 hfsplus_init_once); 693 if (!hfsplus_inode_cachep) 694 return -ENOMEM; 695 err = hfsplus_create_attr_tree_cache(); 696 if (err) 697 goto destroy_inode_cache; 698 err = register_filesystem(&hfsplus_fs_type); 699 if (err) 700 goto destroy_attr_tree_cache; 701 return 0; 702 703 destroy_attr_tree_cache: 704 hfsplus_destroy_attr_tree_cache(); 705 706 destroy_inode_cache: 707 kmem_cache_destroy(hfsplus_inode_cachep); 708 709 return err; 710 } 711 712 static void __exit exit_hfsplus_fs(void) 713 { 714 unregister_filesystem(&hfsplus_fs_type); 715 716 /* 717 * Make sure all delayed rcu free inodes are flushed before we 718 * destroy cache. 719 */ 720 rcu_barrier(); 721 hfsplus_destroy_attr_tree_cache(); 722 kmem_cache_destroy(hfsplus_inode_cachep); 723 } 724 725 module_init(init_hfsplus_fs) 726 module_exit(exit_hfsplus_fs) 727