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 atomic_set(&HFSPLUS_I(inode)->opencnt, 0); 72 HFSPLUS_I(inode)->first_blocks = 0; 73 HFSPLUS_I(inode)->clump_blocks = 0; 74 HFSPLUS_I(inode)->alloc_blocks = 0; 75 HFSPLUS_I(inode)->cached_start = U32_MAX; 76 HFSPLUS_I(inode)->cached_blocks = 0; 77 memset(HFSPLUS_I(inode)->first_extents, 0, sizeof(hfsplus_extent_rec)); 78 memset(HFSPLUS_I(inode)->cached_extents, 0, sizeof(hfsplus_extent_rec)); 79 HFSPLUS_I(inode)->extent_state = 0; 80 mutex_init(&HFSPLUS_I(inode)->extents_lock); 81 HFSPLUS_I(inode)->rsrc_inode = NULL; 82 HFSPLUS_I(inode)->create_date = 0; 83 HFSPLUS_I(inode)->linkid = 0; 84 HFSPLUS_I(inode)->flags = 0; 85 HFSPLUS_I(inode)->fs_blocks = 0; 86 HFSPLUS_I(inode)->userflags = 0; 87 HFSPLUS_I(inode)->subfolders = 0; 88 INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list); 89 spin_lock_init(&HFSPLUS_I(inode)->open_dir_lock); 90 HFSPLUS_I(inode)->phys_size = 0; 91 92 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || 93 inode->i_ino == HFSPLUS_ROOT_CNID) { 94 err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd); 95 if (!err) { 96 err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); 97 if (!err) 98 err = hfsplus_cat_read_inode(inode, &fd); 99 hfs_find_exit(&fd); 100 } 101 } else { 102 err = hfsplus_system_read_inode(inode); 103 } 104 105 if (err) { 106 iget_failed(inode); 107 return ERR_PTR(err); 108 } 109 110 unlock_new_inode(inode); 111 return inode; 112 } 113 114 static int hfsplus_system_write_inode(struct inode *inode) 115 { 116 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); 117 struct hfsplus_vh *vhdr = sbi->s_vhdr; 118 struct hfsplus_fork_raw *fork; 119 struct hfs_btree *tree = NULL; 120 121 switch (inode->i_ino) { 122 case HFSPLUS_EXT_CNID: 123 fork = &vhdr->ext_file; 124 tree = sbi->ext_tree; 125 break; 126 case HFSPLUS_CAT_CNID: 127 fork = &vhdr->cat_file; 128 tree = sbi->cat_tree; 129 break; 130 case HFSPLUS_ALLOC_CNID: 131 fork = &vhdr->alloc_file; 132 break; 133 case HFSPLUS_START_CNID: 134 fork = &vhdr->start_file; 135 break; 136 case HFSPLUS_ATTR_CNID: 137 fork = &vhdr->attr_file; 138 tree = sbi->attr_tree; 139 break; 140 default: 141 return -EIO; 142 } 143 144 if (fork->total_size != cpu_to_be64(inode->i_size)) { 145 set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags); 146 hfsplus_mark_mdb_dirty(inode->i_sb); 147 } 148 hfsplus_inode_write_fork(inode, fork); 149 if (tree) { 150 int err = hfs_btree_write(tree); 151 152 if (err) { 153 pr_err("b-tree write err: %d, ino %lu\n", 154 err, inode->i_ino); 155 return err; 156 } 157 } 158 return 0; 159 } 160 161 static int hfsplus_write_inode(struct inode *inode, 162 struct writeback_control *wbc) 163 { 164 int err; 165 166 hfs_dbg("ino %lu\n", inode->i_ino); 167 168 err = hfsplus_ext_write_extent(inode); 169 if (err) 170 return err; 171 172 if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || 173 inode->i_ino == HFSPLUS_ROOT_CNID) 174 return hfsplus_cat_write_inode(inode); 175 else 176 return hfsplus_system_write_inode(inode); 177 } 178 179 static void hfsplus_evict_inode(struct inode *inode) 180 { 181 hfs_dbg("ino %lu\n", inode->i_ino); 182 truncate_inode_pages_final(&inode->i_data); 183 clear_inode(inode); 184 if (HFSPLUS_IS_RSRC(inode)) { 185 HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL; 186 iput(HFSPLUS_I(inode)->rsrc_inode); 187 } 188 } 189 190 static int hfsplus_sync_fs(struct super_block *sb, int wait) 191 { 192 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 193 struct hfsplus_vh *vhdr = sbi->s_vhdr; 194 int write_backup = 0; 195 int error, error2; 196 197 if (!wait) 198 return 0; 199 200 hfs_dbg("starting...\n"); 201 202 /* 203 * Explicitly write out the special metadata inodes. 204 * 205 * While these special inodes are marked as hashed and written 206 * out peridocically by the flusher threads we redirty them 207 * during writeout of normal inodes, and thus the life lock 208 * prevents us from getting the latest state to disk. 209 */ 210 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); 211 error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); 212 if (!error) 213 error = error2; 214 if (sbi->attr_tree) { 215 error2 = 216 filemap_write_and_wait(sbi->attr_tree->inode->i_mapping); 217 if (!error) 218 error = error2; 219 } 220 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); 221 if (!error) 222 error = error2; 223 224 mutex_lock(&sbi->vh_mutex); 225 mutex_lock(&sbi->alloc_mutex); 226 vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); 227 vhdr->next_cnid = cpu_to_be32(sbi->next_cnid); 228 vhdr->folder_count = cpu_to_be32(sbi->folder_count); 229 vhdr->file_count = cpu_to_be32(sbi->file_count); 230 231 hfs_dbg("free_blocks %u, next_cnid %u, folder_count %u, file_count %u\n", 232 sbi->free_blocks, sbi->next_cnid, 233 sbi->folder_count, sbi->file_count); 234 235 if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) { 236 memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr)); 237 write_backup = 1; 238 } 239 240 error2 = hfsplus_submit_bio(sb, 241 sbi->part_start + HFSPLUS_VOLHEAD_SECTOR, 242 sbi->s_vhdr_buf, NULL, REQ_OP_WRITE); 243 if (!error) 244 error = error2; 245 if (!write_backup) 246 goto out; 247 248 error2 = hfsplus_submit_bio(sb, 249 sbi->part_start + sbi->sect_count - 2, 250 sbi->s_backup_vhdr_buf, NULL, REQ_OP_WRITE); 251 if (!error) 252 error2 = error; 253 out: 254 mutex_unlock(&sbi->alloc_mutex); 255 mutex_unlock(&sbi->vh_mutex); 256 257 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) 258 blkdev_issue_flush(sb->s_bdev); 259 260 hfs_dbg("finished: err %d\n", error); 261 262 return error; 263 } 264 265 static void delayed_sync_fs(struct work_struct *work) 266 { 267 int err; 268 struct hfsplus_sb_info *sbi; 269 270 sbi = container_of(work, struct hfsplus_sb_info, sync_work.work); 271 272 spin_lock(&sbi->work_lock); 273 sbi->work_queued = 0; 274 spin_unlock(&sbi->work_lock); 275 276 err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1); 277 if (err) 278 pr_err("delayed sync fs err %d\n", err); 279 } 280 281 void hfsplus_mark_mdb_dirty(struct super_block *sb) 282 { 283 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 284 unsigned long delay; 285 286 if (sb_rdonly(sb)) 287 return; 288 289 spin_lock(&sbi->work_lock); 290 if (!sbi->work_queued) { 291 delay = msecs_to_jiffies(dirty_writeback_interval * 10); 292 queue_delayed_work(system_long_wq, &sbi->sync_work, delay); 293 sbi->work_queued = 1; 294 } 295 spin_unlock(&sbi->work_lock); 296 } 297 298 static void delayed_free(struct rcu_head *p) 299 { 300 struct hfsplus_sb_info *sbi = container_of(p, struct hfsplus_sb_info, rcu); 301 302 unload_nls(sbi->nls); 303 kfree(sbi); 304 } 305 306 static void hfsplus_put_super(struct super_block *sb) 307 { 308 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 309 310 hfs_dbg("starting...\n"); 311 312 cancel_delayed_work_sync(&sbi->sync_work); 313 314 if (!sb_rdonly(sb) && sbi->s_vhdr) { 315 struct hfsplus_vh *vhdr = sbi->s_vhdr; 316 317 vhdr->modify_date = hfsp_now2mt(); 318 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); 319 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); 320 321 hfsplus_sync_fs(sb, 1); 322 } 323 324 iput(sbi->alloc_file); 325 iput(sbi->hidden_dir); 326 hfs_btree_close(sbi->attr_tree); 327 hfs_btree_close(sbi->cat_tree); 328 hfs_btree_close(sbi->ext_tree); 329 kfree(sbi->s_vhdr_buf); 330 kfree(sbi->s_backup_vhdr_buf); 331 call_rcu(&sbi->rcu, delayed_free); 332 333 hfs_dbg("finished\n"); 334 } 335 336 static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) 337 { 338 struct super_block *sb = dentry->d_sb; 339 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 340 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 341 342 buf->f_type = HFSPLUS_SUPER_MAGIC; 343 buf->f_bsize = sb->s_blocksize; 344 buf->f_blocks = sbi->total_blocks << sbi->fs_shift; 345 buf->f_bfree = sbi->free_blocks << sbi->fs_shift; 346 buf->f_bavail = buf->f_bfree; 347 buf->f_files = 0xFFFFFFFF; 348 buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid; 349 buf->f_fsid = u64_to_fsid(id); 350 buf->f_namelen = HFSPLUS_MAX_STRLEN; 351 352 return 0; 353 } 354 355 static int hfsplus_reconfigure(struct fs_context *fc) 356 { 357 struct super_block *sb = fc->root->d_sb; 358 359 sync_filesystem(sb); 360 if ((bool)(fc->sb_flags & SB_RDONLY) == sb_rdonly(sb)) 361 return 0; 362 if (!(fc->sb_flags & SB_RDONLY)) { 363 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 364 struct hfsplus_vh *vhdr = sbi->s_vhdr; 365 366 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { 367 pr_warn("filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. leaving read-only.\n"); 368 sb->s_flags |= SB_RDONLY; 369 fc->sb_flags |= SB_RDONLY; 370 } else if (test_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { 371 /* nothing */ 372 } else if (vhdr->attributes & 373 cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { 374 pr_warn("filesystem is marked locked, leaving read-only.\n"); 375 sb->s_flags |= SB_RDONLY; 376 fc->sb_flags |= SB_RDONLY; 377 } else if (vhdr->attributes & 378 cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { 379 pr_warn("filesystem is marked journaled, leaving read-only.\n"); 380 sb->s_flags |= SB_RDONLY; 381 fc->sb_flags |= SB_RDONLY; 382 } 383 } 384 return 0; 385 } 386 387 static const struct super_operations hfsplus_sops = { 388 .alloc_inode = hfsplus_alloc_inode, 389 .free_inode = hfsplus_free_inode, 390 .write_inode = hfsplus_write_inode, 391 .evict_inode = hfsplus_evict_inode, 392 .put_super = hfsplus_put_super, 393 .sync_fs = hfsplus_sync_fs, 394 .statfs = hfsplus_statfs, 395 .show_options = hfsplus_show_options, 396 }; 397 398 static int hfsplus_fill_super(struct super_block *sb, struct fs_context *fc) 399 { 400 struct hfsplus_vh *vhdr; 401 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 402 hfsplus_cat_entry entry; 403 struct hfs_find_data fd; 404 struct inode *root, *inode; 405 struct qstr str; 406 struct nls_table *nls; 407 u64 last_fs_block, last_fs_page; 408 int silent = fc->sb_flags & SB_SILENT; 409 int err; 410 411 mutex_init(&sbi->alloc_mutex); 412 mutex_init(&sbi->vh_mutex); 413 spin_lock_init(&sbi->work_lock); 414 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); 415 416 err = -EINVAL; 417 if (!sbi->nls) { 418 /* try utf8 first, as this is the old default behaviour */ 419 sbi->nls = load_nls("utf8"); 420 if (!sbi->nls) 421 sbi->nls = load_nls_default(); 422 } 423 424 /* temporarily use utf8 to correctly find the hidden dir below */ 425 nls = sbi->nls; 426 sbi->nls = load_nls("utf8"); 427 if (!sbi->nls) { 428 pr_err("unable to load nls for utf8\n"); 429 goto out_unload_nls; 430 } 431 432 /* Grab the volume header */ 433 if (hfsplus_read_wrapper(sb)) { 434 if (!silent) 435 pr_warn("unable to find HFS+ superblock\n"); 436 goto out_unload_nls; 437 } 438 vhdr = sbi->s_vhdr; 439 440 /* Copy parts of the volume header into the superblock */ 441 sb->s_magic = HFSPLUS_VOLHEAD_SIG; 442 if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || 443 be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { 444 pr_err("wrong filesystem version\n"); 445 goto out_free_vhdr; 446 } 447 sbi->total_blocks = be32_to_cpu(vhdr->total_blocks); 448 sbi->free_blocks = be32_to_cpu(vhdr->free_blocks); 449 sbi->next_cnid = be32_to_cpu(vhdr->next_cnid); 450 sbi->file_count = be32_to_cpu(vhdr->file_count); 451 sbi->folder_count = be32_to_cpu(vhdr->folder_count); 452 sbi->data_clump_blocks = 453 be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift; 454 if (!sbi->data_clump_blocks) 455 sbi->data_clump_blocks = 1; 456 sbi->rsrc_clump_blocks = 457 be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift; 458 if (!sbi->rsrc_clump_blocks) 459 sbi->rsrc_clump_blocks = 1; 460 461 err = -EFBIG; 462 last_fs_block = sbi->total_blocks - 1; 463 last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >> 464 PAGE_SHIFT; 465 466 if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) || 467 (last_fs_page > (pgoff_t)(~0ULL))) { 468 pr_err("filesystem size too large\n"); 469 goto out_free_vhdr; 470 } 471 472 /* Set up operations so we can load metadata */ 473 sb->s_op = &hfsplus_sops; 474 sb->s_maxbytes = MAX_LFS_FILESIZE; 475 476 if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { 477 pr_warn("Filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. mounting read-only.\n"); 478 sb->s_flags |= SB_RDONLY; 479 } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { 480 /* nothing */ 481 } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { 482 pr_warn("Filesystem is marked locked, mounting read-only.\n"); 483 sb->s_flags |= SB_RDONLY; 484 } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && 485 !sb_rdonly(sb)) { 486 pr_warn("write access to a journaled filesystem is not supported, use the force option at your own risk, mounting read-only.\n"); 487 sb->s_flags |= SB_RDONLY; 488 } 489 490 err = -EINVAL; 491 492 /* Load metadata objects (B*Trees) */ 493 sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); 494 if (!sbi->ext_tree) { 495 pr_err("failed to load extents file\n"); 496 goto out_free_vhdr; 497 } 498 sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); 499 if (!sbi->cat_tree) { 500 pr_err("failed to load catalog file\n"); 501 goto out_close_ext_tree; 502 } 503 atomic_set(&sbi->attr_tree_state, HFSPLUS_EMPTY_ATTR_TREE); 504 if (vhdr->attr_file.total_blocks != 0) { 505 sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID); 506 if (!sbi->attr_tree) { 507 pr_err("failed to load attributes file\n"); 508 goto out_close_cat_tree; 509 } 510 atomic_set(&sbi->attr_tree_state, HFSPLUS_VALID_ATTR_TREE); 511 } 512 sb->s_xattr = hfsplus_xattr_handlers; 513 514 inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); 515 if (IS_ERR(inode)) { 516 pr_err("failed to load allocation file\n"); 517 err = PTR_ERR(inode); 518 goto out_close_attr_tree; 519 } 520 sbi->alloc_file = inode; 521 522 /* Load the root directory */ 523 root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); 524 if (IS_ERR(root)) { 525 pr_err("failed to load root directory\n"); 526 err = PTR_ERR(root); 527 goto out_put_alloc_file; 528 } 529 530 set_default_d_op(sb, &hfsplus_dentry_operations); 531 sb->s_root = d_make_root(root); 532 if (!sb->s_root) { 533 err = -ENOMEM; 534 goto out_put_alloc_file; 535 } 536 537 str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; 538 str.name = HFSP_HIDDENDIR_NAME; 539 err = hfs_find_init(sbi->cat_tree, &fd); 540 if (err) 541 goto out_put_root; 542 err = hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); 543 if (unlikely(err < 0)) 544 goto out_put_root; 545 if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { 546 hfs_find_exit(&fd); 547 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) { 548 err = -EIO; 549 goto out_put_root; 550 } 551 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); 552 if (IS_ERR(inode)) { 553 err = PTR_ERR(inode); 554 goto out_put_root; 555 } 556 sbi->hidden_dir = inode; 557 } else 558 hfs_find_exit(&fd); 559 560 if (!sb_rdonly(sb)) { 561 /* 562 * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused 563 * all three are registered with Apple for our use 564 */ 565 vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); 566 vhdr->modify_date = hfsp_now2mt(); 567 be32_add_cpu(&vhdr->write_count, 1); 568 vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); 569 vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); 570 hfsplus_sync_fs(sb, 1); 571 572 if (!sbi->hidden_dir) { 573 mutex_lock(&sbi->vh_mutex); 574 sbi->hidden_dir = hfsplus_new_inode(sb, root, S_IFDIR); 575 if (!sbi->hidden_dir) { 576 mutex_unlock(&sbi->vh_mutex); 577 err = -ENOMEM; 578 goto out_put_root; 579 } 580 err = hfsplus_create_cat(sbi->hidden_dir->i_ino, root, 581 &str, sbi->hidden_dir); 582 if (err) { 583 mutex_unlock(&sbi->vh_mutex); 584 goto out_put_hidden_dir; 585 } 586 587 err = hfsplus_init_security(sbi->hidden_dir, 588 root, &str); 589 if (err == -EOPNOTSUPP) 590 err = 0; /* Operation is not supported. */ 591 else if (err) { 592 /* 593 * Try to delete anyway without 594 * error analysis. 595 */ 596 hfsplus_delete_cat(sbi->hidden_dir->i_ino, 597 root, &str); 598 mutex_unlock(&sbi->vh_mutex); 599 goto out_put_hidden_dir; 600 } 601 602 mutex_unlock(&sbi->vh_mutex); 603 hfsplus_mark_inode_dirty(sbi->hidden_dir, 604 HFSPLUS_I_CAT_DIRTY); 605 } 606 } 607 608 unload_nls(sbi->nls); 609 sbi->nls = nls; 610 return 0; 611 612 out_put_hidden_dir: 613 cancel_delayed_work_sync(&sbi->sync_work); 614 iput(sbi->hidden_dir); 615 out_put_root: 616 dput(sb->s_root); 617 sb->s_root = NULL; 618 out_put_alloc_file: 619 iput(sbi->alloc_file); 620 out_close_attr_tree: 621 hfs_btree_close(sbi->attr_tree); 622 out_close_cat_tree: 623 hfs_btree_close(sbi->cat_tree); 624 out_close_ext_tree: 625 hfs_btree_close(sbi->ext_tree); 626 out_free_vhdr: 627 kfree(sbi->s_vhdr_buf); 628 kfree(sbi->s_backup_vhdr_buf); 629 out_unload_nls: 630 unload_nls(sbi->nls); 631 unload_nls(nls); 632 kfree(sbi); 633 return err; 634 } 635 636 MODULE_AUTHOR("Brad Boyer"); 637 MODULE_DESCRIPTION("Extended Macintosh Filesystem"); 638 MODULE_LICENSE("GPL"); 639 640 static struct kmem_cache *hfsplus_inode_cachep; 641 642 static struct inode *hfsplus_alloc_inode(struct super_block *sb) 643 { 644 struct hfsplus_inode_info *i; 645 646 i = alloc_inode_sb(sb, hfsplus_inode_cachep, GFP_KERNEL); 647 return i ? &i->vfs_inode : NULL; 648 } 649 650 static void hfsplus_free_inode(struct inode *inode) 651 { 652 kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode)); 653 } 654 655 #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) 656 657 static int hfsplus_get_tree(struct fs_context *fc) 658 { 659 return get_tree_bdev(fc, hfsplus_fill_super); 660 } 661 662 static void hfsplus_free_fc(struct fs_context *fc) 663 { 664 kfree(fc->s_fs_info); 665 } 666 667 static const struct fs_context_operations hfsplus_context_ops = { 668 .parse_param = hfsplus_parse_param, 669 .get_tree = hfsplus_get_tree, 670 .reconfigure = hfsplus_reconfigure, 671 .free = hfsplus_free_fc, 672 }; 673 674 static int hfsplus_init_fs_context(struct fs_context *fc) 675 { 676 struct hfsplus_sb_info *sbi; 677 678 sbi = kzalloc(sizeof(struct hfsplus_sb_info), GFP_KERNEL); 679 if (!sbi) 680 return -ENOMEM; 681 682 if (fc->purpose != FS_CONTEXT_FOR_RECONFIGURE) 683 hfsplus_fill_defaults(sbi); 684 685 fc->s_fs_info = sbi; 686 fc->ops = &hfsplus_context_ops; 687 688 return 0; 689 } 690 691 static struct file_system_type hfsplus_fs_type = { 692 .owner = THIS_MODULE, 693 .name = "hfsplus", 694 .kill_sb = kill_block_super, 695 .fs_flags = FS_REQUIRES_DEV, 696 .init_fs_context = hfsplus_init_fs_context, 697 }; 698 MODULE_ALIAS_FS("hfsplus"); 699 700 static void hfsplus_init_once(void *p) 701 { 702 struct hfsplus_inode_info *i = p; 703 704 inode_init_once(&i->vfs_inode); 705 } 706 707 static int __init init_hfsplus_fs(void) 708 { 709 int err; 710 711 hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", 712 HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, 713 hfsplus_init_once); 714 if (!hfsplus_inode_cachep) 715 return -ENOMEM; 716 err = hfsplus_create_attr_tree_cache(); 717 if (err) 718 goto destroy_inode_cache; 719 err = register_filesystem(&hfsplus_fs_type); 720 if (err) 721 goto destroy_attr_tree_cache; 722 return 0; 723 724 destroy_attr_tree_cache: 725 hfsplus_destroy_attr_tree_cache(); 726 727 destroy_inode_cache: 728 kmem_cache_destroy(hfsplus_inode_cachep); 729 730 return err; 731 } 732 733 static void __exit exit_hfsplus_fs(void) 734 { 735 unregister_filesystem(&hfsplus_fs_type); 736 737 /* 738 * Make sure all delayed rcu free inodes are flushed before we 739 * destroy cache. 740 */ 741 rcu_barrier(); 742 hfsplus_destroy_attr_tree_cache(); 743 kmem_cache_destroy(hfsplus_inode_cachep); 744 } 745 746 module_init(init_hfsplus_fs) 747 module_exit(exit_hfsplus_fs) 748