1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/fs/hfsplus/inode.c 4 * 5 * Copyright (C) 2001 6 * Brad Boyer (flar@allandria.com) 7 * (C) 2003 Ardis Technologies <roman@ardistech.com> 8 * 9 * Inode handling routines 10 */ 11 12 #include <linux/blkdev.h> 13 #include <linux/mm.h> 14 #include <linux/fs.h> 15 #include <linux/pagemap.h> 16 #include <linux/mpage.h> 17 #include <linux/sched.h> 18 #include <linux/cred.h> 19 #include <linux/uio.h> 20 #include <linux/fileattr.h> 21 22 #include "hfsplus_fs.h" 23 #include "hfsplus_raw.h" 24 #include "xattr.h" 25 26 static int hfsplus_read_folio(struct file *file, struct folio *folio) 27 { 28 return block_read_full_folio(folio, hfsplus_get_block); 29 } 30 31 static void hfsplus_write_failed(struct address_space *mapping, loff_t to) 32 { 33 struct inode *inode = mapping->host; 34 35 if (to > inode->i_size) { 36 truncate_pagecache(inode, inode->i_size); 37 hfsplus_file_truncate(inode); 38 } 39 } 40 41 int hfsplus_write_begin(const struct kiocb *iocb, 42 struct address_space *mapping, loff_t pos, 43 unsigned len, struct folio **foliop, 44 void **fsdata) 45 { 46 int ret; 47 48 ret = cont_write_begin(iocb, mapping, pos, len, foliop, fsdata, 49 hfsplus_get_block, 50 &HFSPLUS_I(mapping->host)->phys_size); 51 if (unlikely(ret)) 52 hfsplus_write_failed(mapping, pos + len); 53 54 return ret; 55 } 56 57 static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block) 58 { 59 return generic_block_bmap(mapping, block, hfsplus_get_block); 60 } 61 62 static bool hfsplus_release_folio(struct folio *folio, gfp_t mask) 63 { 64 struct inode *inode = folio->mapping->host; 65 struct super_block *sb = inode->i_sb; 66 struct hfs_btree *tree; 67 struct hfs_bnode *node; 68 u32 nidx; 69 int i; 70 bool res = true; 71 72 switch (inode->i_ino) { 73 case HFSPLUS_EXT_CNID: 74 tree = HFSPLUS_SB(sb)->ext_tree; 75 break; 76 case HFSPLUS_CAT_CNID: 77 tree = HFSPLUS_SB(sb)->cat_tree; 78 break; 79 case HFSPLUS_ATTR_CNID: 80 tree = HFSPLUS_SB(sb)->attr_tree; 81 break; 82 default: 83 BUG(); 84 return false; 85 } 86 if (!tree) 87 return false; 88 if (tree->node_size >= PAGE_SIZE) { 89 nidx = folio->index >> 90 (tree->node_size_shift - PAGE_SHIFT); 91 spin_lock(&tree->hash_lock); 92 node = hfs_bnode_findhash(tree, nidx); 93 if (!node) 94 ; 95 else if (atomic_read(&node->refcnt)) 96 res = false; 97 if (res && node) { 98 hfs_bnode_unhash(node); 99 hfs_bnode_free(node); 100 } 101 spin_unlock(&tree->hash_lock); 102 } else { 103 nidx = folio->index << 104 (PAGE_SHIFT - tree->node_size_shift); 105 i = 1 << (PAGE_SHIFT - tree->node_size_shift); 106 spin_lock(&tree->hash_lock); 107 do { 108 node = hfs_bnode_findhash(tree, nidx++); 109 if (!node) 110 continue; 111 if (atomic_read(&node->refcnt)) { 112 res = false; 113 break; 114 } 115 hfs_bnode_unhash(node); 116 hfs_bnode_free(node); 117 } while (--i && nidx < tree->node_count); 118 spin_unlock(&tree->hash_lock); 119 } 120 return res ? try_to_free_buffers(folio) : false; 121 } 122 123 static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter) 124 { 125 struct file *file = iocb->ki_filp; 126 struct address_space *mapping = file->f_mapping; 127 struct inode *inode = mapping->host; 128 size_t count = iov_iter_count(iter); 129 ssize_t ret; 130 131 ret = blockdev_direct_IO(iocb, inode, iter, hfsplus_get_block); 132 133 /* 134 * In case of error extending write may have instantiated a few 135 * blocks outside i_size. Trim these off again. 136 */ 137 if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) { 138 loff_t isize = i_size_read(inode); 139 loff_t end = iocb->ki_pos + count; 140 141 if (end > isize) 142 hfsplus_write_failed(mapping, end); 143 } 144 145 return ret; 146 } 147 148 static int hfsplus_writepages(struct address_space *mapping, 149 struct writeback_control *wbc) 150 { 151 return mpage_writepages(mapping, wbc, hfsplus_get_block); 152 } 153 154 const struct address_space_operations hfsplus_btree_aops = { 155 .dirty_folio = block_dirty_folio, 156 .invalidate_folio = block_invalidate_folio, 157 .read_folio = hfsplus_read_folio, 158 .writepages = hfsplus_writepages, 159 .write_begin = hfsplus_write_begin, 160 .write_end = generic_write_end, 161 .migrate_folio = buffer_migrate_folio, 162 .bmap = hfsplus_bmap, 163 .release_folio = hfsplus_release_folio, 164 }; 165 166 const struct address_space_operations hfsplus_aops = { 167 .dirty_folio = block_dirty_folio, 168 .invalidate_folio = block_invalidate_folio, 169 .read_folio = hfsplus_read_folio, 170 .write_begin = hfsplus_write_begin, 171 .write_end = generic_write_end, 172 .bmap = hfsplus_bmap, 173 .direct_IO = hfsplus_direct_IO, 174 .writepages = hfsplus_writepages, 175 .migrate_folio = buffer_migrate_folio, 176 }; 177 178 const struct dentry_operations hfsplus_dentry_operations = { 179 .d_hash = hfsplus_hash_dentry, 180 .d_compare = hfsplus_compare_dentry, 181 }; 182 183 static int hfsplus_get_perms(struct inode *inode, 184 struct hfsplus_perm *perms, int dir) 185 { 186 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); 187 u16 mode; 188 189 mode = be16_to_cpu(perms->mode); 190 if (dir) { 191 if (mode && !S_ISDIR(mode)) 192 goto bad_type; 193 } else if (mode) { 194 switch (mode & S_IFMT) { 195 case S_IFREG: 196 case S_IFLNK: 197 case S_IFCHR: 198 case S_IFBLK: 199 case S_IFIFO: 200 case S_IFSOCK: 201 break; 202 default: 203 goto bad_type; 204 } 205 } 206 207 i_uid_write(inode, be32_to_cpu(perms->owner)); 208 if ((test_bit(HFSPLUS_SB_UID, &sbi->flags)) || (!i_uid_read(inode) && !mode)) 209 inode->i_uid = sbi->uid; 210 211 i_gid_write(inode, be32_to_cpu(perms->group)); 212 if ((test_bit(HFSPLUS_SB_GID, &sbi->flags)) || (!i_gid_read(inode) && !mode)) 213 inode->i_gid = sbi->gid; 214 215 if (dir) { 216 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask)); 217 mode |= S_IFDIR; 218 } else if (!mode) 219 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask)); 220 inode->i_mode = mode; 221 222 HFSPLUS_I(inode)->userflags = perms->userflags; 223 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE) 224 inode->i_flags |= S_IMMUTABLE; 225 else 226 inode->i_flags &= ~S_IMMUTABLE; 227 if (perms->rootflags & HFSPLUS_FLG_APPEND) 228 inode->i_flags |= S_APPEND; 229 else 230 inode->i_flags &= ~S_APPEND; 231 return 0; 232 bad_type: 233 pr_err("invalid file type 0%04o for inode %lu\n", mode, inode->i_ino); 234 return -EIO; 235 } 236 237 static int hfsplus_file_open(struct inode *inode, struct file *file) 238 { 239 if (HFSPLUS_IS_RSRC(inode)) 240 inode = HFSPLUS_I(inode)->rsrc_inode; 241 if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS) 242 return -EOVERFLOW; 243 atomic_inc(&HFSPLUS_I(inode)->opencnt); 244 return 0; 245 } 246 247 static int hfsplus_file_release(struct inode *inode, struct file *file) 248 { 249 struct super_block *sb = inode->i_sb; 250 251 if (HFSPLUS_IS_RSRC(inode)) 252 inode = HFSPLUS_I(inode)->rsrc_inode; 253 if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) { 254 inode_lock(inode); 255 hfsplus_file_truncate(inode); 256 if (inode->i_flags & S_DEAD) { 257 hfsplus_delete_cat(inode->i_ino, 258 HFSPLUS_SB(sb)->hidden_dir, NULL); 259 hfsplus_delete_inode(inode); 260 } 261 inode_unlock(inode); 262 } 263 return 0; 264 } 265 266 static int hfsplus_setattr(struct mnt_idmap *idmap, 267 struct dentry *dentry, struct iattr *attr) 268 { 269 struct inode *inode = d_inode(dentry); 270 int error; 271 272 error = setattr_prepare(&nop_mnt_idmap, dentry, attr); 273 if (error) 274 return error; 275 276 if ((attr->ia_valid & ATTR_SIZE) && 277 attr->ia_size != i_size_read(inode)) { 278 inode_dio_wait(inode); 279 if (attr->ia_size > inode->i_size) { 280 error = generic_cont_expand_simple(inode, 281 attr->ia_size); 282 if (error) 283 return error; 284 } 285 truncate_setsize(inode, attr->ia_size); 286 hfsplus_file_truncate(inode); 287 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); 288 } 289 290 setattr_copy(&nop_mnt_idmap, inode, attr); 291 mark_inode_dirty(inode); 292 293 return 0; 294 } 295 296 int hfsplus_getattr(struct mnt_idmap *idmap, const struct path *path, 297 struct kstat *stat, u32 request_mask, 298 unsigned int query_flags) 299 { 300 struct inode *inode = d_inode(path->dentry); 301 struct hfsplus_inode_info *hip = HFSPLUS_I(inode); 302 303 if (request_mask & STATX_BTIME) { 304 stat->result_mask |= STATX_BTIME; 305 stat->btime = hfsp_mt2ut(hip->create_date); 306 } 307 308 if (inode->i_flags & S_APPEND) 309 stat->attributes |= STATX_ATTR_APPEND; 310 if (inode->i_flags & S_IMMUTABLE) 311 stat->attributes |= STATX_ATTR_IMMUTABLE; 312 if (hip->userflags & HFSPLUS_FLG_NODUMP) 313 stat->attributes |= STATX_ATTR_NODUMP; 314 315 stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE | 316 STATX_ATTR_NODUMP; 317 318 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat); 319 return 0; 320 } 321 322 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end, 323 int datasync) 324 { 325 struct inode *inode = file->f_mapping->host; 326 struct hfsplus_inode_info *hip = HFSPLUS_I(inode); 327 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); 328 struct hfsplus_vh *vhdr = sbi->s_vhdr; 329 int error = 0, error2; 330 331 hfs_dbg("inode->i_ino %lu, start %llu, end %llu\n", 332 inode->i_ino, start, end); 333 334 error = file_write_and_wait_range(file, start, end); 335 if (error) 336 return error; 337 inode_lock(inode); 338 339 /* 340 * Sync inode metadata into the catalog and extent trees. 341 */ 342 sync_inode_metadata(inode, 1); 343 344 /* 345 * And explicitly write out the btrees. 346 */ 347 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags)) 348 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); 349 350 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) { 351 error2 = 352 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); 353 if (!error) 354 error = error2; 355 } 356 357 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) { 358 if (sbi->attr_tree) { 359 error2 = 360 filemap_write_and_wait( 361 sbi->attr_tree->inode->i_mapping); 362 if (!error) 363 error = error2; 364 } else { 365 pr_err("sync non-existent attributes tree\n"); 366 } 367 } 368 369 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) { 370 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); 371 if (!error) 372 error = error2; 373 } 374 375 mutex_lock(&sbi->vh_mutex); 376 hfsplus_prepare_volume_header_for_commit(vhdr); 377 mutex_unlock(&sbi->vh_mutex); 378 379 error2 = hfsplus_commit_superblock(inode->i_sb); 380 if (!error) 381 error = error2; 382 383 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) 384 blkdev_issue_flush(inode->i_sb->s_bdev); 385 386 inode_unlock(inode); 387 388 return error; 389 } 390 391 static const struct inode_operations hfsplus_file_inode_operations = { 392 .setattr = hfsplus_setattr, 393 .getattr = hfsplus_getattr, 394 .listxattr = hfsplus_listxattr, 395 .fileattr_get = hfsplus_fileattr_get, 396 .fileattr_set = hfsplus_fileattr_set, 397 }; 398 399 static const struct inode_operations hfsplus_symlink_inode_operations = { 400 .get_link = page_get_link, 401 .setattr = hfsplus_setattr, 402 .getattr = hfsplus_getattr, 403 .listxattr = hfsplus_listxattr, 404 }; 405 406 static const struct inode_operations hfsplus_special_inode_operations = { 407 .setattr = hfsplus_setattr, 408 .getattr = hfsplus_getattr, 409 .listxattr = hfsplus_listxattr, 410 }; 411 412 static const struct file_operations hfsplus_file_operations = { 413 .llseek = generic_file_llseek, 414 .read_iter = generic_file_read_iter, 415 .write_iter = generic_file_write_iter, 416 .mmap_prepare = generic_file_mmap_prepare, 417 .splice_read = filemap_splice_read, 418 .splice_write = iter_file_splice_write, 419 .fsync = hfsplus_file_fsync, 420 .open = hfsplus_file_open, 421 .release = hfsplus_file_release, 422 .unlocked_ioctl = hfsplus_ioctl, 423 }; 424 425 struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir, 426 umode_t mode) 427 { 428 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 429 struct inode *inode = new_inode(sb); 430 struct hfsplus_inode_info *hip; 431 432 if (!inode) 433 return NULL; 434 435 inode->i_ino = sbi->next_cnid++; 436 inode_init_owner(&nop_mnt_idmap, inode, dir, mode); 437 set_nlink(inode, 1); 438 simple_inode_init_ts(inode); 439 440 hip = HFSPLUS_I(inode); 441 INIT_LIST_HEAD(&hip->open_dir_list); 442 spin_lock_init(&hip->open_dir_lock); 443 mutex_init(&hip->extents_lock); 444 atomic_set(&hip->opencnt, 0); 445 hip->extent_state = 0; 446 hip->flags = 0; 447 hip->userflags = 0; 448 hip->subfolders = 0; 449 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec)); 450 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec)); 451 hip->alloc_blocks = 0; 452 hip->first_blocks = 0; 453 hip->cached_start = 0; 454 hip->cached_blocks = 0; 455 hip->phys_size = 0; 456 hip->fs_blocks = 0; 457 hip->rsrc_inode = NULL; 458 if (S_ISDIR(inode->i_mode)) { 459 inode->i_size = 2; 460 sbi->folder_count++; 461 inode->i_op = &hfsplus_dir_inode_operations; 462 inode->i_fop = &hfsplus_dir_operations; 463 } else if (S_ISREG(inode->i_mode)) { 464 sbi->file_count++; 465 inode->i_op = &hfsplus_file_inode_operations; 466 inode->i_fop = &hfsplus_file_operations; 467 inode->i_mapping->a_ops = &hfsplus_aops; 468 hip->clump_blocks = sbi->data_clump_blocks; 469 } else if (S_ISLNK(inode->i_mode)) { 470 sbi->file_count++; 471 inode->i_op = &hfsplus_symlink_inode_operations; 472 inode_nohighmem(inode); 473 inode->i_mapping->a_ops = &hfsplus_aops; 474 hip->clump_blocks = 1; 475 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || 476 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { 477 sbi->file_count++; 478 inode->i_op = &hfsplus_special_inode_operations; 479 } else 480 sbi->file_count++; 481 482 insert_inode_hash(inode); 483 mark_inode_dirty(inode); 484 hfsplus_mark_mdb_dirty(sb); 485 486 return inode; 487 } 488 489 void hfsplus_delete_inode(struct inode *inode) 490 { 491 struct super_block *sb = inode->i_sb; 492 493 if (S_ISDIR(inode->i_mode)) { 494 HFSPLUS_SB(sb)->folder_count--; 495 hfsplus_mark_mdb_dirty(sb); 496 return; 497 } 498 HFSPLUS_SB(sb)->file_count--; 499 if (S_ISREG(inode->i_mode)) { 500 if (!inode->i_nlink) { 501 inode->i_size = 0; 502 hfsplus_file_truncate(inode); 503 } 504 } else if (S_ISLNK(inode->i_mode)) { 505 inode->i_size = 0; 506 hfsplus_file_truncate(inode); 507 } 508 hfsplus_mark_mdb_dirty(sb); 509 } 510 511 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork) 512 { 513 struct super_block *sb = inode->i_sb; 514 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 515 struct hfsplus_inode_info *hip = HFSPLUS_I(inode); 516 u32 count; 517 int i; 518 519 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec)); 520 for (count = 0, i = 0; i < 8; i++) 521 count += be32_to_cpu(fork->extents[i].block_count); 522 hip->first_blocks = count; 523 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec)); 524 hip->cached_start = 0; 525 hip->cached_blocks = 0; 526 527 hip->alloc_blocks = be32_to_cpu(fork->total_blocks); 528 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size); 529 hip->fs_blocks = 530 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 531 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits); 532 hip->clump_blocks = 533 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift; 534 if (!hip->clump_blocks) { 535 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ? 536 sbi->rsrc_clump_blocks : 537 sbi->data_clump_blocks; 538 } 539 } 540 541 void hfsplus_inode_write_fork(struct inode *inode, 542 struct hfsplus_fork_raw *fork) 543 { 544 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents, 545 sizeof(hfsplus_extent_rec)); 546 fork->total_size = cpu_to_be64(inode->i_size); 547 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks); 548 } 549 550 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd) 551 { 552 hfsplus_cat_entry entry; 553 int res = 0; 554 u16 type; 555 556 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset); 557 558 HFSPLUS_I(inode)->linkid = 0; 559 if (type == HFSPLUS_FOLDER) { 560 struct hfsplus_cat_folder *folder = &entry.folder; 561 562 if (fd->entrylength < sizeof(struct hfsplus_cat_folder)) { 563 pr_err("bad catalog folder entry\n"); 564 res = -EIO; 565 goto out; 566 } 567 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, 568 sizeof(struct hfsplus_cat_folder)); 569 res = hfsplus_get_perms(inode, &folder->permissions, 1); 570 if (res) 571 goto out; 572 set_nlink(inode, 1); 573 inode->i_size = 2 + be32_to_cpu(folder->valence); 574 inode_set_atime_to_ts(inode, hfsp_mt2ut(folder->access_date)); 575 inode_set_mtime_to_ts(inode, 576 hfsp_mt2ut(folder->content_mod_date)); 577 inode_set_ctime_to_ts(inode, 578 hfsp_mt2ut(folder->attribute_mod_date)); 579 HFSPLUS_I(inode)->create_date = folder->create_date; 580 HFSPLUS_I(inode)->fs_blocks = 0; 581 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) { 582 HFSPLUS_I(inode)->subfolders = 583 be32_to_cpu(folder->subfolders); 584 } 585 inode->i_op = &hfsplus_dir_inode_operations; 586 inode->i_fop = &hfsplus_dir_operations; 587 } else if (type == HFSPLUS_FILE) { 588 struct hfsplus_cat_file *file = &entry.file; 589 590 if (fd->entrylength < sizeof(struct hfsplus_cat_file)) { 591 pr_err("bad catalog file entry\n"); 592 res = -EIO; 593 goto out; 594 } 595 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, 596 sizeof(struct hfsplus_cat_file)); 597 598 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ? 599 &file->rsrc_fork : &file->data_fork); 600 res = hfsplus_get_perms(inode, &file->permissions, 0); 601 if (res) 602 goto out; 603 set_nlink(inode, 1); 604 if (S_ISREG(inode->i_mode)) { 605 if (file->permissions.dev) 606 set_nlink(inode, 607 be32_to_cpu(file->permissions.dev)); 608 inode->i_op = &hfsplus_file_inode_operations; 609 inode->i_fop = &hfsplus_file_operations; 610 inode->i_mapping->a_ops = &hfsplus_aops; 611 } else if (S_ISLNK(inode->i_mode)) { 612 inode->i_op = &hfsplus_symlink_inode_operations; 613 inode_nohighmem(inode); 614 inode->i_mapping->a_ops = &hfsplus_aops; 615 } else { 616 inode->i_op = &hfsplus_special_inode_operations; 617 init_special_inode(inode, inode->i_mode, 618 be32_to_cpu(file->permissions.dev)); 619 } 620 inode_set_atime_to_ts(inode, hfsp_mt2ut(file->access_date)); 621 inode_set_mtime_to_ts(inode, 622 hfsp_mt2ut(file->content_mod_date)); 623 inode_set_ctime_to_ts(inode, 624 hfsp_mt2ut(file->attribute_mod_date)); 625 HFSPLUS_I(inode)->create_date = file->create_date; 626 } else { 627 pr_err("bad catalog entry used to create inode\n"); 628 res = -EIO; 629 } 630 out: 631 return res; 632 } 633 634 int hfsplus_cat_write_inode(struct inode *inode) 635 { 636 struct inode *main_inode = inode; 637 struct hfs_btree *tree = HFSPLUS_SB(inode->i_sb)->cat_tree; 638 struct hfs_find_data fd; 639 hfsplus_cat_entry entry; 640 int res = 0; 641 642 hfs_dbg("inode->i_ino %lu\n", inode->i_ino); 643 644 if (HFSPLUS_IS_RSRC(inode)) 645 main_inode = HFSPLUS_I(inode)->rsrc_inode; 646 647 if (!main_inode->i_nlink) 648 return 0; 649 650 if (hfs_find_init(tree, &fd)) 651 /* panic? */ 652 return -EIO; 653 654 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd)) 655 /* panic? */ 656 goto out; 657 658 if (S_ISDIR(main_inode->i_mode)) { 659 struct hfsplus_cat_folder *folder = &entry.folder; 660 661 if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) { 662 pr_err("bad catalog folder entry\n"); 663 res = -EIO; 664 goto out; 665 } 666 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, 667 sizeof(struct hfsplus_cat_folder)); 668 /* simple node checks? */ 669 hfsplus_cat_set_perms(inode, &folder->permissions); 670 folder->access_date = hfsp_ut2mt(inode_get_atime(inode)); 671 folder->content_mod_date = hfsp_ut2mt(inode_get_mtime(inode)); 672 folder->attribute_mod_date = hfsp_ut2mt(inode_get_ctime(inode)); 673 folder->valence = cpu_to_be32(inode->i_size - 2); 674 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) { 675 folder->subfolders = 676 cpu_to_be32(HFSPLUS_I(inode)->subfolders); 677 } 678 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, 679 sizeof(struct hfsplus_cat_folder)); 680 } else if (HFSPLUS_IS_RSRC(inode)) { 681 struct hfsplus_cat_file *file = &entry.file; 682 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, 683 sizeof(struct hfsplus_cat_file)); 684 hfsplus_inode_write_fork(inode, &file->rsrc_fork); 685 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, 686 sizeof(struct hfsplus_cat_file)); 687 } else { 688 struct hfsplus_cat_file *file = &entry.file; 689 690 if (fd.entrylength < sizeof(struct hfsplus_cat_file)) { 691 pr_err("bad catalog file entry\n"); 692 res = -EIO; 693 goto out; 694 } 695 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, 696 sizeof(struct hfsplus_cat_file)); 697 hfsplus_inode_write_fork(inode, &file->data_fork); 698 hfsplus_cat_set_perms(inode, &file->permissions); 699 if (HFSPLUS_FLG_IMMUTABLE & 700 (file->permissions.rootflags | 701 file->permissions.userflags)) 702 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); 703 else 704 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED); 705 file->access_date = hfsp_ut2mt(inode_get_atime(inode)); 706 file->content_mod_date = hfsp_ut2mt(inode_get_mtime(inode)); 707 file->attribute_mod_date = hfsp_ut2mt(inode_get_ctime(inode)); 708 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, 709 sizeof(struct hfsplus_cat_file)); 710 } 711 712 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags); 713 out: 714 hfs_find_exit(&fd); 715 716 if (!res) { 717 res = hfs_btree_write(tree); 718 if (res) { 719 pr_err("b-tree write err: %d, ino %lu\n", 720 res, inode->i_ino); 721 } 722 } 723 724 return res; 725 } 726 727 int hfsplus_fileattr_get(struct dentry *dentry, struct file_kattr *fa) 728 { 729 struct inode *inode = d_inode(dentry); 730 struct hfsplus_inode_info *hip = HFSPLUS_I(inode); 731 unsigned int flags = 0; 732 733 if (inode->i_flags & S_IMMUTABLE) 734 flags |= FS_IMMUTABLE_FL; 735 if (inode->i_flags & S_APPEND) 736 flags |= FS_APPEND_FL; 737 if (hip->userflags & HFSPLUS_FLG_NODUMP) 738 flags |= FS_NODUMP_FL; 739 740 fileattr_fill_flags(fa, flags); 741 742 return 0; 743 } 744 745 int hfsplus_fileattr_set(struct mnt_idmap *idmap, 746 struct dentry *dentry, struct file_kattr *fa) 747 { 748 struct inode *inode = d_inode(dentry); 749 struct hfsplus_inode_info *hip = HFSPLUS_I(inode); 750 unsigned int new_fl = 0; 751 752 if (fileattr_has_fsx(fa)) 753 return -EOPNOTSUPP; 754 755 /* don't silently ignore unsupported ext2 flags */ 756 if (fa->flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL)) 757 return -EOPNOTSUPP; 758 759 if (fa->flags & FS_IMMUTABLE_FL) 760 new_fl |= S_IMMUTABLE; 761 762 if (fa->flags & FS_APPEND_FL) 763 new_fl |= S_APPEND; 764 765 inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND); 766 767 if (fa->flags & FS_NODUMP_FL) 768 hip->userflags |= HFSPLUS_FLG_NODUMP; 769 else 770 hip->userflags &= ~HFSPLUS_FLG_NODUMP; 771 772 inode_set_ctime_current(inode); 773 mark_inode_dirty(inode); 774 775 return 0; 776 } 777