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 loff_t isize; 129 size_t count = iov_iter_count(iter); 130 loff_t end = iocb->ki_pos + count; 131 ssize_t ret; 132 133 /* 134 * The hfsplus_get_block() only allows creating the next sequential block. 135 * For direct writes beyond EOF, expand the file first. 136 */ 137 if (iov_iter_rw(iter) == WRITE && iocb->ki_pos > i_size_read(inode)) { 138 loff_t start_off, end_off; 139 loff_t start_page, end_page; 140 141 isize = i_size_read(inode); 142 143 /* 144 * Wait for any in-flight DIO on this inode to finish before 145 * calling generic_cont_expand_simple(). 146 */ 147 inode_dio_wait(inode); 148 149 ret = generic_cont_expand_simple(inode, iocb->ki_pos); 150 if (ret) 151 return ret; 152 153 start_off = isize; 154 end_off = (end > 0) ? end - 1 : end; 155 156 ret = filemap_write_and_wait_range(mapping, start_off, end_off); 157 if (ret) 158 return ret; 159 160 start_page = start_off >> PAGE_SHIFT; 161 end_page = end_off >> PAGE_SHIFT; 162 163 invalidate_inode_pages2_range(mapping, start_page, end_page); 164 } 165 166 ret = blockdev_direct_IO(iocb, inode, iter, hfsplus_get_block); 167 168 /* 169 * In case of error extending write may have instantiated a few 170 * blocks outside i_size. Trim these off again. 171 */ 172 if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) { 173 isize = i_size_read(inode); 174 175 if (end > isize) 176 hfsplus_write_failed(mapping, end); 177 } 178 179 return ret; 180 } 181 182 static int hfsplus_writepages(struct address_space *mapping, 183 struct writeback_control *wbc) 184 { 185 return mpage_writepages(mapping, wbc, hfsplus_get_block); 186 } 187 188 const struct address_space_operations hfsplus_btree_aops = { 189 .dirty_folio = block_dirty_folio, 190 .invalidate_folio = block_invalidate_folio, 191 .read_folio = hfsplus_read_folio, 192 .writepages = hfsplus_writepages, 193 .write_begin = hfsplus_write_begin, 194 .write_end = generic_write_end, 195 .migrate_folio = buffer_migrate_folio, 196 .bmap = hfsplus_bmap, 197 .release_folio = hfsplus_release_folio, 198 }; 199 200 const struct address_space_operations hfsplus_aops = { 201 .dirty_folio = block_dirty_folio, 202 .invalidate_folio = block_invalidate_folio, 203 .read_folio = hfsplus_read_folio, 204 .write_begin = hfsplus_write_begin, 205 .write_end = generic_write_end, 206 .bmap = hfsplus_bmap, 207 .direct_IO = hfsplus_direct_IO, 208 .writepages = hfsplus_writepages, 209 .migrate_folio = buffer_migrate_folio, 210 }; 211 212 const struct dentry_operations hfsplus_dentry_operations = { 213 .d_hash = hfsplus_hash_dentry, 214 .d_compare = hfsplus_compare_dentry, 215 }; 216 217 static int hfsplus_get_perms(struct inode *inode, 218 struct hfsplus_perm *perms, int dir) 219 { 220 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); 221 u16 mode; 222 223 mode = be16_to_cpu(perms->mode); 224 if (dir) { 225 if (mode && !S_ISDIR(mode)) 226 goto bad_type; 227 } else if (mode) { 228 switch (mode & S_IFMT) { 229 case S_IFREG: 230 case S_IFLNK: 231 case S_IFCHR: 232 case S_IFBLK: 233 case S_IFIFO: 234 case S_IFSOCK: 235 break; 236 default: 237 goto bad_type; 238 } 239 } 240 241 i_uid_write(inode, be32_to_cpu(perms->owner)); 242 if ((test_bit(HFSPLUS_SB_UID, &sbi->flags)) || (!i_uid_read(inode) && !mode)) 243 inode->i_uid = sbi->uid; 244 245 i_gid_write(inode, be32_to_cpu(perms->group)); 246 if ((test_bit(HFSPLUS_SB_GID, &sbi->flags)) || (!i_gid_read(inode) && !mode)) 247 inode->i_gid = sbi->gid; 248 249 if (dir) { 250 mode = mode ? (mode & S_IALLUGO) : (S_IRWXUGO & ~(sbi->umask)); 251 mode |= S_IFDIR; 252 } else if (!mode) 253 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & ~(sbi->umask)); 254 inode->i_mode = mode; 255 256 HFSPLUS_I(inode)->userflags = perms->userflags; 257 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE) 258 inode->i_flags |= S_IMMUTABLE; 259 else 260 inode->i_flags &= ~S_IMMUTABLE; 261 if (perms->rootflags & HFSPLUS_FLG_APPEND) 262 inode->i_flags |= S_APPEND; 263 else 264 inode->i_flags &= ~S_APPEND; 265 return 0; 266 bad_type: 267 pr_err("invalid file type 0%04o for inode %llu\n", mode, inode->i_ino); 268 return -EIO; 269 } 270 271 static int hfsplus_file_open(struct inode *inode, struct file *file) 272 { 273 if (HFSPLUS_IS_RSRC(inode)) 274 inode = HFSPLUS_I(inode)->rsrc_inode; 275 if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS) 276 return -EOVERFLOW; 277 atomic_inc(&HFSPLUS_I(inode)->opencnt); 278 return 0; 279 } 280 281 static int hfsplus_file_release(struct inode *inode, struct file *file) 282 { 283 struct super_block *sb = inode->i_sb; 284 285 if (HFSPLUS_IS_RSRC(inode)) 286 inode = HFSPLUS_I(inode)->rsrc_inode; 287 if (atomic_dec_and_test(&HFSPLUS_I(inode)->opencnt)) { 288 inode_lock(inode); 289 hfsplus_file_truncate(inode); 290 if (inode->i_flags & S_DEAD) { 291 hfsplus_delete_cat(inode->i_ino, 292 HFSPLUS_SB(sb)->hidden_dir, NULL); 293 hfsplus_delete_inode(inode); 294 } 295 inode_unlock(inode); 296 } 297 return 0; 298 } 299 300 static int hfsplus_setattr(struct mnt_idmap *idmap, 301 struct dentry *dentry, struct iattr *attr) 302 { 303 struct inode *inode = d_inode(dentry); 304 int error; 305 306 error = setattr_prepare(&nop_mnt_idmap, dentry, attr); 307 if (error) 308 return error; 309 310 if ((attr->ia_valid & ATTR_SIZE) && 311 attr->ia_size != i_size_read(inode)) { 312 inode_dio_wait(inode); 313 if (attr->ia_size > inode->i_size) { 314 error = generic_cont_expand_simple(inode, 315 attr->ia_size); 316 if (error) 317 return error; 318 } 319 truncate_setsize(inode, attr->ia_size); 320 hfsplus_file_truncate(inode); 321 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); 322 } 323 324 setattr_copy(&nop_mnt_idmap, inode, attr); 325 mark_inode_dirty(inode); 326 327 return 0; 328 } 329 330 int hfsplus_getattr(struct mnt_idmap *idmap, const struct path *path, 331 struct kstat *stat, u32 request_mask, 332 unsigned int query_flags) 333 { 334 struct inode *inode = d_inode(path->dentry); 335 struct hfsplus_inode_info *hip = HFSPLUS_I(inode); 336 337 if (request_mask & STATX_BTIME) { 338 stat->result_mask |= STATX_BTIME; 339 stat->btime = hfsp_mt2ut(hip->create_date); 340 } 341 342 if (inode->i_flags & S_APPEND) 343 stat->attributes |= STATX_ATTR_APPEND; 344 if (inode->i_flags & S_IMMUTABLE) 345 stat->attributes |= STATX_ATTR_IMMUTABLE; 346 if (hip->userflags & HFSPLUS_FLG_NODUMP) 347 stat->attributes |= STATX_ATTR_NODUMP; 348 349 stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE | 350 STATX_ATTR_NODUMP; 351 352 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat); 353 return 0; 354 } 355 356 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end, 357 int datasync) 358 { 359 struct inode *inode = file->f_mapping->host; 360 struct hfsplus_inode_info *hip = HFSPLUS_I(inode); 361 struct super_block *sb = inode->i_sb; 362 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); 363 struct hfsplus_vh *vhdr = sbi->s_vhdr; 364 int error = 0, error2; 365 366 hfs_dbg("inode->i_ino %llu, start %llu, end %llu\n", 367 inode->i_ino, start, end); 368 369 error = file_write_and_wait_range(file, start, end); 370 if (error) 371 return error; 372 inode_lock(inode); 373 374 /* 375 * Sync inode metadata into the catalog and extent trees. 376 */ 377 sync_inode_metadata(inode, 1); 378 379 /* 380 * And explicitly write out the btrees. 381 */ 382 if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, 383 &HFSPLUS_I(HFSPLUS_CAT_TREE_I(sb))->flags)) { 384 clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags); 385 error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); 386 } 387 388 if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, 389 &HFSPLUS_I(HFSPLUS_EXT_TREE_I(sb))->flags)) { 390 clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags); 391 error2 = 392 filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); 393 if (!error) 394 error = error2; 395 } 396 397 if (sbi->attr_tree) { 398 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, 399 &HFSPLUS_I(HFSPLUS_ATTR_TREE_I(sb))->flags)) { 400 clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags); 401 error2 = 402 filemap_write_and_wait( 403 sbi->attr_tree->inode->i_mapping); 404 if (!error) 405 error = error2; 406 } 407 } else { 408 if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) 409 pr_err("sync non-existent attributes tree\n"); 410 } 411 412 if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, 413 &HFSPLUS_I(sbi->alloc_file)->flags)) { 414 clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags); 415 error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); 416 if (!error) 417 error = error2; 418 } 419 420 mutex_lock(&sbi->vh_mutex); 421 hfsplus_prepare_volume_header_for_commit(vhdr); 422 mutex_unlock(&sbi->vh_mutex); 423 424 error2 = hfsplus_commit_superblock(inode->i_sb); 425 if (!error) 426 error = error2; 427 428 if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) 429 blkdev_issue_flush(inode->i_sb->s_bdev); 430 431 inode_unlock(inode); 432 433 return error; 434 } 435 436 static const struct inode_operations hfsplus_file_inode_operations = { 437 .setattr = hfsplus_setattr, 438 .getattr = hfsplus_getattr, 439 .listxattr = hfsplus_listxattr, 440 .fileattr_get = hfsplus_fileattr_get, 441 .fileattr_set = hfsplus_fileattr_set, 442 }; 443 444 static const struct inode_operations hfsplus_symlink_inode_operations = { 445 .get_link = page_get_link, 446 .setattr = hfsplus_setattr, 447 .getattr = hfsplus_getattr, 448 .listxattr = hfsplus_listxattr, 449 }; 450 451 static const struct inode_operations hfsplus_special_inode_operations = { 452 .setattr = hfsplus_setattr, 453 .getattr = hfsplus_getattr, 454 .listxattr = hfsplus_listxattr, 455 }; 456 457 static const struct file_operations hfsplus_file_operations = { 458 .llseek = generic_file_llseek, 459 .read_iter = generic_file_read_iter, 460 .write_iter = generic_file_write_iter, 461 .mmap_prepare = generic_file_mmap_prepare, 462 .splice_read = filemap_splice_read, 463 .splice_write = iter_file_splice_write, 464 .fsync = hfsplus_file_fsync, 465 .open = hfsplus_file_open, 466 .release = hfsplus_file_release, 467 .unlocked_ioctl = hfsplus_ioctl, 468 }; 469 470 struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir, 471 umode_t mode) 472 { 473 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 474 struct inode *inode = new_inode(sb); 475 struct hfsplus_inode_info *hip; 476 477 if (!inode) 478 return NULL; 479 480 inode->i_ino = sbi->next_cnid++; 481 inode_init_owner(&nop_mnt_idmap, inode, dir, mode); 482 set_nlink(inode, 1); 483 simple_inode_init_ts(inode); 484 485 hip = HFSPLUS_I(inode); 486 mutex_init(&hip->extents_lock); 487 atomic_set(&hip->opencnt, 0); 488 hip->extent_state = 0; 489 hip->flags = 0; 490 hip->userflags = 0; 491 hip->subfolders = 0; 492 memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec)); 493 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec)); 494 hip->alloc_blocks = 0; 495 hip->first_blocks = 0; 496 hip->cached_start = 0; 497 hip->cached_blocks = 0; 498 hip->phys_size = 0; 499 hip->fs_blocks = 0; 500 hip->rsrc_inode = NULL; 501 if (S_ISDIR(inode->i_mode)) { 502 inode->i_size = 2; 503 sbi->folder_count++; 504 inode->i_op = &hfsplus_dir_inode_operations; 505 inode->i_fop = &hfsplus_dir_operations; 506 } else if (S_ISREG(inode->i_mode)) { 507 sbi->file_count++; 508 inode->i_op = &hfsplus_file_inode_operations; 509 inode->i_fop = &hfsplus_file_operations; 510 inode->i_mapping->a_ops = &hfsplus_aops; 511 hip->clump_blocks = sbi->data_clump_blocks; 512 } else if (S_ISLNK(inode->i_mode)) { 513 sbi->file_count++; 514 inode->i_op = &hfsplus_symlink_inode_operations; 515 inode_nohighmem(inode); 516 inode->i_mapping->a_ops = &hfsplus_aops; 517 hip->clump_blocks = 1; 518 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || 519 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { 520 sbi->file_count++; 521 inode->i_op = &hfsplus_special_inode_operations; 522 } else 523 sbi->file_count++; 524 525 insert_inode_hash(inode); 526 mark_inode_dirty(inode); 527 hfsplus_mark_mdb_dirty(sb); 528 529 return inode; 530 } 531 532 void hfsplus_delete_inode(struct inode *inode) 533 { 534 struct super_block *sb = inode->i_sb; 535 536 if (S_ISDIR(inode->i_mode)) { 537 HFSPLUS_SB(sb)->folder_count--; 538 hfsplus_mark_mdb_dirty(sb); 539 return; 540 } 541 HFSPLUS_SB(sb)->file_count--; 542 if (S_ISREG(inode->i_mode)) { 543 if (!inode->i_nlink) { 544 inode->i_size = 0; 545 hfsplus_file_truncate(inode); 546 } 547 } else if (S_ISLNK(inode->i_mode)) { 548 inode->i_size = 0; 549 hfsplus_file_truncate(inode); 550 } 551 hfsplus_mark_mdb_dirty(sb); 552 } 553 554 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork) 555 { 556 struct super_block *sb = inode->i_sb; 557 struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); 558 struct hfsplus_inode_info *hip = HFSPLUS_I(inode); 559 u32 count; 560 int i; 561 562 memcpy(&hip->first_extents, &fork->extents, sizeof(hfsplus_extent_rec)); 563 for (count = 0, i = 0; i < 8; i++) 564 count += be32_to_cpu(fork->extents[i].block_count); 565 hip->first_blocks = count; 566 memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec)); 567 hip->cached_start = 0; 568 hip->cached_blocks = 0; 569 570 hip->alloc_blocks = be32_to_cpu(fork->total_blocks); 571 hip->phys_size = inode->i_size = be64_to_cpu(fork->total_size); 572 hip->fs_blocks = 573 (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 574 inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits); 575 hip->clump_blocks = 576 be32_to_cpu(fork->clump_size) >> sbi->alloc_blksz_shift; 577 if (!hip->clump_blocks) { 578 hip->clump_blocks = HFSPLUS_IS_RSRC(inode) ? 579 sbi->rsrc_clump_blocks : 580 sbi->data_clump_blocks; 581 } 582 } 583 584 void hfsplus_inode_write_fork(struct inode *inode, 585 struct hfsplus_fork_raw *fork) 586 { 587 memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents, 588 sizeof(hfsplus_extent_rec)); 589 fork->total_size = cpu_to_be64(inode->i_size); 590 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode)->alloc_blocks); 591 } 592 593 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd) 594 { 595 hfsplus_cat_entry entry; 596 int res = 0; 597 u16 type; 598 599 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset); 600 601 HFSPLUS_I(inode)->linkid = 0; 602 if (type == HFSPLUS_FOLDER) { 603 struct hfsplus_cat_folder *folder = &entry.folder; 604 605 if (fd->entrylength < sizeof(struct hfsplus_cat_folder)) { 606 pr_err("bad catalog folder entry\n"); 607 res = -EIO; 608 goto out; 609 } 610 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, 611 sizeof(struct hfsplus_cat_folder)); 612 res = hfsplus_get_perms(inode, &folder->permissions, 1); 613 if (res) 614 goto out; 615 set_nlink(inode, 1); 616 inode->i_size = 2 + be32_to_cpu(folder->valence); 617 inode_set_atime_to_ts(inode, hfsp_mt2ut(folder->access_date)); 618 inode_set_mtime_to_ts(inode, 619 hfsp_mt2ut(folder->content_mod_date)); 620 inode_set_ctime_to_ts(inode, 621 hfsp_mt2ut(folder->attribute_mod_date)); 622 HFSPLUS_I(inode)->create_date = folder->create_date; 623 HFSPLUS_I(inode)->fs_blocks = 0; 624 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) { 625 HFSPLUS_I(inode)->subfolders = 626 be32_to_cpu(folder->subfolders); 627 } 628 inode->i_op = &hfsplus_dir_inode_operations; 629 inode->i_fop = &hfsplus_dir_operations; 630 } else if (type == HFSPLUS_FILE) { 631 struct hfsplus_cat_file *file = &entry.file; 632 633 if (fd->entrylength < sizeof(struct hfsplus_cat_file)) { 634 pr_err("bad catalog file entry\n"); 635 res = -EIO; 636 goto out; 637 } 638 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, 639 sizeof(struct hfsplus_cat_file)); 640 641 hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ? 642 &file->rsrc_fork : &file->data_fork); 643 res = hfsplus_get_perms(inode, &file->permissions, 0); 644 if (res) 645 goto out; 646 set_nlink(inode, 1); 647 if (S_ISREG(inode->i_mode)) { 648 if (file->permissions.dev) 649 set_nlink(inode, 650 be32_to_cpu(file->permissions.dev)); 651 inode->i_op = &hfsplus_file_inode_operations; 652 inode->i_fop = &hfsplus_file_operations; 653 inode->i_mapping->a_ops = &hfsplus_aops; 654 } else if (S_ISLNK(inode->i_mode)) { 655 inode->i_op = &hfsplus_symlink_inode_operations; 656 inode_nohighmem(inode); 657 inode->i_mapping->a_ops = &hfsplus_aops; 658 } else { 659 inode->i_op = &hfsplus_special_inode_operations; 660 init_special_inode(inode, inode->i_mode, 661 be32_to_cpu(file->permissions.dev)); 662 } 663 inode_set_atime_to_ts(inode, hfsp_mt2ut(file->access_date)); 664 inode_set_mtime_to_ts(inode, 665 hfsp_mt2ut(file->content_mod_date)); 666 inode_set_ctime_to_ts(inode, 667 hfsp_mt2ut(file->attribute_mod_date)); 668 HFSPLUS_I(inode)->create_date = file->create_date; 669 } else { 670 pr_err("bad catalog entry used to create inode\n"); 671 res = -EIO; 672 } 673 out: 674 return res; 675 } 676 677 int hfsplus_cat_write_inode(struct inode *inode) 678 { 679 struct inode *main_inode = inode; 680 struct hfs_btree *tree = HFSPLUS_SB(inode->i_sb)->cat_tree; 681 struct hfs_find_data fd; 682 hfsplus_cat_entry entry; 683 int res = 0; 684 685 hfs_dbg("inode->i_ino %llu\n", inode->i_ino); 686 687 if (HFSPLUS_IS_RSRC(inode)) 688 main_inode = HFSPLUS_I(inode)->rsrc_inode; 689 690 if (!main_inode->i_nlink) 691 return 0; 692 693 if (hfs_find_init(tree, &fd)) 694 /* panic? */ 695 return -EIO; 696 697 if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd)) 698 /* panic? */ 699 goto out; 700 701 if (S_ISDIR(main_inode->i_mode)) { 702 struct hfsplus_cat_folder *folder = &entry.folder; 703 704 if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) { 705 pr_err("bad catalog folder entry\n"); 706 res = -EIO; 707 goto out; 708 } 709 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, 710 sizeof(struct hfsplus_cat_folder)); 711 /* simple node checks? */ 712 hfsplus_cat_set_perms(inode, &folder->permissions); 713 folder->access_date = hfsp_ut2mt(inode_get_atime(inode)); 714 folder->content_mod_date = hfsp_ut2mt(inode_get_mtime(inode)); 715 folder->attribute_mod_date = hfsp_ut2mt(inode_get_ctime(inode)); 716 folder->valence = cpu_to_be32(inode->i_size - 2); 717 if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) { 718 folder->subfolders = 719 cpu_to_be32(HFSPLUS_I(inode)->subfolders); 720 } 721 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, 722 sizeof(struct hfsplus_cat_folder)); 723 } else if (HFSPLUS_IS_RSRC(inode)) { 724 struct hfsplus_cat_file *file = &entry.file; 725 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, 726 sizeof(struct hfsplus_cat_file)); 727 hfsplus_inode_write_fork(inode, &file->rsrc_fork); 728 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, 729 sizeof(struct hfsplus_cat_file)); 730 } else { 731 struct hfsplus_cat_file *file = &entry.file; 732 733 if (fd.entrylength < sizeof(struct hfsplus_cat_file)) { 734 pr_err("bad catalog file entry\n"); 735 res = -EIO; 736 goto out; 737 } 738 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, 739 sizeof(struct hfsplus_cat_file)); 740 hfsplus_inode_write_fork(inode, &file->data_fork); 741 hfsplus_cat_set_perms(inode, &file->permissions); 742 if (HFSPLUS_FLG_IMMUTABLE & 743 (file->permissions.rootflags | 744 file->permissions.userflags)) 745 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); 746 else 747 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED); 748 file->access_date = hfsp_ut2mt(inode_get_atime(inode)); 749 file->content_mod_date = hfsp_ut2mt(inode_get_mtime(inode)); 750 file->attribute_mod_date = hfsp_ut2mt(inode_get_ctime(inode)); 751 hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, 752 sizeof(struct hfsplus_cat_file)); 753 } 754 755 res = hfs_btree_write(tree); 756 if (res) { 757 pr_err("b-tree write err: %d, ino %llu\n", 758 res, inode->i_ino); 759 goto out; 760 } 761 762 set_bit(HFSPLUS_I_CAT_DIRTY, 763 &HFSPLUS_I(HFSPLUS_CAT_TREE_I(inode->i_sb))->flags); 764 set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags); 765 out: 766 hfs_find_exit(&fd); 767 768 return res; 769 } 770 771 int hfsplus_fileattr_get(struct dentry *dentry, struct file_kattr *fa) 772 { 773 struct inode *inode = d_inode(dentry); 774 struct hfsplus_inode_info *hip = HFSPLUS_I(inode); 775 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); 776 unsigned int flags = 0; 777 778 if (inode->i_flags & S_IMMUTABLE) 779 flags |= FS_IMMUTABLE_FL; 780 if (inode->i_flags & S_APPEND) 781 flags |= FS_APPEND_FL; 782 if (hip->userflags & HFSPLUS_FLG_NODUMP) 783 flags |= FS_NODUMP_FL; 784 if (test_bit(HFSPLUS_SB_CASEFOLD, &sbi->flags)) 785 flags |= FS_CASEFOLD_FL; 786 787 fileattr_fill_flags(fa, flags); 788 789 return 0; 790 } 791 792 int hfsplus_fileattr_set(struct mnt_idmap *idmap, 793 struct dentry *dentry, struct file_kattr *fa) 794 { 795 struct inode *inode = d_inode(dentry); 796 struct hfsplus_inode_info *hip = HFSPLUS_I(inode); 797 struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); 798 unsigned int allowed = FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NODUMP_FL; 799 unsigned int new_fl = 0; 800 801 if (fileattr_has_fsx(fa)) 802 return -EOPNOTSUPP; 803 804 /* 805 * FS_CASEFOLD_FL reflects HFSPLUS_SB_CASEFOLD, a mount-time 806 * property. Accept it as a no-op so chattr's RMW round-trip 807 * succeeds; reject any attempt to enable it on a volume that 808 * was not formatted case-insensitive. 809 */ 810 if (test_bit(HFSPLUS_SB_CASEFOLD, &sbi->flags)) 811 allowed |= FS_CASEFOLD_FL; 812 813 /* don't silently ignore unsupported ext2 flags */ 814 if (fa->flags & ~allowed) 815 return -EOPNOTSUPP; 816 817 if (fa->flags & FS_IMMUTABLE_FL) 818 new_fl |= S_IMMUTABLE; 819 820 if (fa->flags & FS_APPEND_FL) 821 new_fl |= S_APPEND; 822 823 inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND); 824 825 if (fa->flags & FS_NODUMP_FL) 826 hip->userflags |= HFSPLUS_FLG_NODUMP; 827 else 828 hip->userflags &= ~HFSPLUS_FLG_NODUMP; 829 830 inode_set_ctime_current(inode); 831 mark_inode_dirty(inode); 832 833 return 0; 834 } 835