1 /* 2 * linux/fs/hfs/inode.c 3 * 4 * Copyright (C) 1995-1997 Paul H. Hargrove 5 * (C) 2003 Ardis Technologies <roman@ardistech.com> 6 * This file may be distributed under the terms of the GNU General Public License. 7 * 8 * This file contains inode-related functions which do not depend on 9 * which scheme is being used to represent forks. 10 * 11 * Based on the minix file system code, (C) 1991, 1992 by Linus Torvalds 12 */ 13 14 #include <linux/pagemap.h> 15 #include <linux/mpage.h> 16 #include <linux/sched.h> 17 #include <linux/cred.h> 18 #include <linux/uio.h> 19 #include <linux/xattr.h> 20 #include <linux/blkdev.h> 21 22 #include "hfs_fs.h" 23 #include "btree.h" 24 25 static const struct file_operations hfs_file_operations; 26 static const struct inode_operations hfs_file_inode_operations; 27 28 /*================ Variable-like macros ================*/ 29 30 #define HFS_VALID_MODE_BITS (S_IFREG | S_IFDIR | S_IRWXUGO) 31 32 static int hfs_read_folio(struct file *file, struct folio *folio) 33 { 34 return block_read_full_folio(folio, hfs_get_block); 35 } 36 37 static void hfs_write_failed(struct address_space *mapping, loff_t to) 38 { 39 struct inode *inode = mapping->host; 40 41 if (to > inode->i_size) { 42 truncate_pagecache(inode, inode->i_size); 43 hfs_file_truncate(inode); 44 } 45 } 46 47 int hfs_write_begin(struct file *file, struct address_space *mapping, 48 loff_t pos, unsigned len, struct page **pagep, void **fsdata) 49 { 50 int ret; 51 52 *pagep = NULL; 53 ret = cont_write_begin(file, mapping, pos, len, pagep, fsdata, 54 hfs_get_block, 55 &HFS_I(mapping->host)->phys_size); 56 if (unlikely(ret)) 57 hfs_write_failed(mapping, pos + len); 58 59 return ret; 60 } 61 62 static sector_t hfs_bmap(struct address_space *mapping, sector_t block) 63 { 64 return generic_block_bmap(mapping, block, hfs_get_block); 65 } 66 67 static bool hfs_release_folio(struct folio *folio, gfp_t mask) 68 { 69 struct inode *inode = folio->mapping->host; 70 struct super_block *sb = inode->i_sb; 71 struct hfs_btree *tree; 72 struct hfs_bnode *node; 73 u32 nidx; 74 int i; 75 bool res = true; 76 77 switch (inode->i_ino) { 78 case HFS_EXT_CNID: 79 tree = HFS_SB(sb)->ext_tree; 80 break; 81 case HFS_CAT_CNID: 82 tree = HFS_SB(sb)->cat_tree; 83 break; 84 default: 85 BUG(); 86 return false; 87 } 88 89 if (!tree) 90 return false; 91 92 if (tree->node_size >= PAGE_SIZE) { 93 nidx = folio->index >> (tree->node_size_shift - PAGE_SHIFT); 94 spin_lock(&tree->hash_lock); 95 node = hfs_bnode_findhash(tree, nidx); 96 if (!node) 97 ; 98 else if (atomic_read(&node->refcnt)) 99 res = false; 100 if (res && node) { 101 hfs_bnode_unhash(node); 102 hfs_bnode_free(node); 103 } 104 spin_unlock(&tree->hash_lock); 105 } else { 106 nidx = folio->index << (PAGE_SHIFT - tree->node_size_shift); 107 i = 1 << (PAGE_SHIFT - tree->node_size_shift); 108 spin_lock(&tree->hash_lock); 109 do { 110 node = hfs_bnode_findhash(tree, nidx++); 111 if (!node) 112 continue; 113 if (atomic_read(&node->refcnt)) { 114 res = false; 115 break; 116 } 117 hfs_bnode_unhash(node); 118 hfs_bnode_free(node); 119 } while (--i && nidx < tree->node_count); 120 spin_unlock(&tree->hash_lock); 121 } 122 return res ? try_to_free_buffers(folio) : false; 123 } 124 125 static ssize_t hfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) 126 { 127 struct file *file = iocb->ki_filp; 128 struct address_space *mapping = file->f_mapping; 129 struct inode *inode = mapping->host; 130 size_t count = iov_iter_count(iter); 131 ssize_t ret; 132 133 ret = blockdev_direct_IO(iocb, inode, iter, hfs_get_block); 134 135 /* 136 * In case of error extending write may have instantiated a few 137 * blocks outside i_size. Trim these off again. 138 */ 139 if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) { 140 loff_t isize = i_size_read(inode); 141 loff_t end = iocb->ki_pos + count; 142 143 if (end > isize) 144 hfs_write_failed(mapping, end); 145 } 146 147 return ret; 148 } 149 150 static int hfs_writepages(struct address_space *mapping, 151 struct writeback_control *wbc) 152 { 153 return mpage_writepages(mapping, wbc, hfs_get_block); 154 } 155 156 const struct address_space_operations hfs_btree_aops = { 157 .dirty_folio = block_dirty_folio, 158 .invalidate_folio = block_invalidate_folio, 159 .read_folio = hfs_read_folio, 160 .writepages = hfs_writepages, 161 .write_begin = hfs_write_begin, 162 .write_end = generic_write_end, 163 .migrate_folio = buffer_migrate_folio, 164 .bmap = hfs_bmap, 165 .release_folio = hfs_release_folio, 166 }; 167 168 const struct address_space_operations hfs_aops = { 169 .dirty_folio = block_dirty_folio, 170 .invalidate_folio = block_invalidate_folio, 171 .read_folio = hfs_read_folio, 172 .write_begin = hfs_write_begin, 173 .write_end = generic_write_end, 174 .bmap = hfs_bmap, 175 .direct_IO = hfs_direct_IO, 176 .writepages = hfs_writepages, 177 .migrate_folio = buffer_migrate_folio, 178 }; 179 180 /* 181 * hfs_new_inode 182 */ 183 struct inode *hfs_new_inode(struct inode *dir, const struct qstr *name, umode_t mode) 184 { 185 struct super_block *sb = dir->i_sb; 186 struct inode *inode = new_inode(sb); 187 if (!inode) 188 return NULL; 189 190 mutex_init(&HFS_I(inode)->extents_lock); 191 INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list); 192 spin_lock_init(&HFS_I(inode)->open_dir_lock); 193 hfs_cat_build_key(sb, (btree_key *)&HFS_I(inode)->cat_key, dir->i_ino, name); 194 inode->i_ino = HFS_SB(sb)->next_id++; 195 inode->i_mode = mode; 196 inode->i_uid = current_fsuid(); 197 inode->i_gid = current_fsgid(); 198 set_nlink(inode, 1); 199 simple_inode_init_ts(inode); 200 HFS_I(inode)->flags = 0; 201 HFS_I(inode)->rsrc_inode = NULL; 202 HFS_I(inode)->fs_blocks = 0; 203 if (S_ISDIR(mode)) { 204 inode->i_size = 2; 205 HFS_SB(sb)->folder_count++; 206 if (dir->i_ino == HFS_ROOT_CNID) 207 HFS_SB(sb)->root_dirs++; 208 inode->i_op = &hfs_dir_inode_operations; 209 inode->i_fop = &hfs_dir_operations; 210 inode->i_mode |= S_IRWXUGO; 211 inode->i_mode &= ~HFS_SB(inode->i_sb)->s_dir_umask; 212 } else if (S_ISREG(mode)) { 213 HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks; 214 HFS_SB(sb)->file_count++; 215 if (dir->i_ino == HFS_ROOT_CNID) 216 HFS_SB(sb)->root_files++; 217 inode->i_op = &hfs_file_inode_operations; 218 inode->i_fop = &hfs_file_operations; 219 inode->i_mapping->a_ops = &hfs_aops; 220 inode->i_mode |= S_IRUGO|S_IXUGO; 221 if (mode & S_IWUSR) 222 inode->i_mode |= S_IWUGO; 223 inode->i_mode &= ~HFS_SB(inode->i_sb)->s_file_umask; 224 HFS_I(inode)->phys_size = 0; 225 HFS_I(inode)->alloc_blocks = 0; 226 HFS_I(inode)->first_blocks = 0; 227 HFS_I(inode)->cached_start = 0; 228 HFS_I(inode)->cached_blocks = 0; 229 memset(HFS_I(inode)->first_extents, 0, sizeof(hfs_extent_rec)); 230 memset(HFS_I(inode)->cached_extents, 0, sizeof(hfs_extent_rec)); 231 } 232 insert_inode_hash(inode); 233 mark_inode_dirty(inode); 234 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); 235 hfs_mark_mdb_dirty(sb); 236 237 return inode; 238 } 239 240 void hfs_delete_inode(struct inode *inode) 241 { 242 struct super_block *sb = inode->i_sb; 243 244 hfs_dbg(INODE, "delete_inode: %lu\n", inode->i_ino); 245 if (S_ISDIR(inode->i_mode)) { 246 HFS_SB(sb)->folder_count--; 247 if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID)) 248 HFS_SB(sb)->root_dirs--; 249 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); 250 hfs_mark_mdb_dirty(sb); 251 return; 252 } 253 HFS_SB(sb)->file_count--; 254 if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID)) 255 HFS_SB(sb)->root_files--; 256 if (S_ISREG(inode->i_mode)) { 257 if (!inode->i_nlink) { 258 inode->i_size = 0; 259 hfs_file_truncate(inode); 260 } 261 } 262 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); 263 hfs_mark_mdb_dirty(sb); 264 } 265 266 void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext, 267 __be32 __log_size, __be32 phys_size, u32 clump_size) 268 { 269 struct super_block *sb = inode->i_sb; 270 u32 log_size = be32_to_cpu(__log_size); 271 u16 count; 272 int i; 273 274 memcpy(HFS_I(inode)->first_extents, ext, sizeof(hfs_extent_rec)); 275 for (count = 0, i = 0; i < 3; i++) 276 count += be16_to_cpu(ext[i].count); 277 HFS_I(inode)->first_blocks = count; 278 279 inode->i_size = HFS_I(inode)->phys_size = log_size; 280 HFS_I(inode)->fs_blocks = (log_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 281 inode_set_bytes(inode, HFS_I(inode)->fs_blocks << sb->s_blocksize_bits); 282 HFS_I(inode)->alloc_blocks = be32_to_cpu(phys_size) / 283 HFS_SB(sb)->alloc_blksz; 284 HFS_I(inode)->clump_blocks = clump_size / HFS_SB(sb)->alloc_blksz; 285 if (!HFS_I(inode)->clump_blocks) 286 HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks; 287 } 288 289 struct hfs_iget_data { 290 struct hfs_cat_key *key; 291 hfs_cat_rec *rec; 292 }; 293 294 static int hfs_test_inode(struct inode *inode, void *data) 295 { 296 struct hfs_iget_data *idata = data; 297 hfs_cat_rec *rec; 298 299 rec = idata->rec; 300 switch (rec->type) { 301 case HFS_CDR_DIR: 302 return inode->i_ino == be32_to_cpu(rec->dir.DirID); 303 case HFS_CDR_FIL: 304 return inode->i_ino == be32_to_cpu(rec->file.FlNum); 305 default: 306 BUG(); 307 return 1; 308 } 309 } 310 311 /* 312 * hfs_read_inode 313 */ 314 static int hfs_read_inode(struct inode *inode, void *data) 315 { 316 struct hfs_iget_data *idata = data; 317 struct hfs_sb_info *hsb = HFS_SB(inode->i_sb); 318 hfs_cat_rec *rec; 319 320 HFS_I(inode)->flags = 0; 321 HFS_I(inode)->rsrc_inode = NULL; 322 mutex_init(&HFS_I(inode)->extents_lock); 323 INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list); 324 spin_lock_init(&HFS_I(inode)->open_dir_lock); 325 326 /* Initialize the inode */ 327 inode->i_uid = hsb->s_uid; 328 inode->i_gid = hsb->s_gid; 329 set_nlink(inode, 1); 330 331 if (idata->key) 332 HFS_I(inode)->cat_key = *idata->key; 333 else 334 HFS_I(inode)->flags |= HFS_FLG_RSRC; 335 HFS_I(inode)->tz_secondswest = sys_tz.tz_minuteswest * 60; 336 337 rec = idata->rec; 338 switch (rec->type) { 339 case HFS_CDR_FIL: 340 if (!HFS_IS_RSRC(inode)) { 341 hfs_inode_read_fork(inode, rec->file.ExtRec, rec->file.LgLen, 342 rec->file.PyLen, be16_to_cpu(rec->file.ClpSize)); 343 } else { 344 hfs_inode_read_fork(inode, rec->file.RExtRec, rec->file.RLgLen, 345 rec->file.RPyLen, be16_to_cpu(rec->file.ClpSize)); 346 } 347 348 inode->i_ino = be32_to_cpu(rec->file.FlNum); 349 inode->i_mode = S_IRUGO | S_IXUGO; 350 if (!(rec->file.Flags & HFS_FIL_LOCK)) 351 inode->i_mode |= S_IWUGO; 352 inode->i_mode &= ~hsb->s_file_umask; 353 inode->i_mode |= S_IFREG; 354 inode_set_mtime_to_ts(inode, 355 inode_set_atime_to_ts(inode, inode_set_ctime_to_ts(inode, hfs_m_to_utime(rec->file.MdDat)))); 356 inode->i_op = &hfs_file_inode_operations; 357 inode->i_fop = &hfs_file_operations; 358 inode->i_mapping->a_ops = &hfs_aops; 359 break; 360 case HFS_CDR_DIR: 361 inode->i_ino = be32_to_cpu(rec->dir.DirID); 362 inode->i_size = be16_to_cpu(rec->dir.Val) + 2; 363 HFS_I(inode)->fs_blocks = 0; 364 inode->i_mode = S_IFDIR | (S_IRWXUGO & ~hsb->s_dir_umask); 365 inode_set_mtime_to_ts(inode, 366 inode_set_atime_to_ts(inode, inode_set_ctime_to_ts(inode, hfs_m_to_utime(rec->dir.MdDat)))); 367 inode->i_op = &hfs_dir_inode_operations; 368 inode->i_fop = &hfs_dir_operations; 369 break; 370 default: 371 make_bad_inode(inode); 372 } 373 return 0; 374 } 375 376 /* 377 * __hfs_iget() 378 * 379 * Given the MDB for a HFS filesystem, a 'key' and an 'entry' in 380 * the catalog B-tree and the 'type' of the desired file return the 381 * inode for that file/directory or NULL. Note that 'type' indicates 382 * whether we want the actual file or directory, or the corresponding 383 * metadata (AppleDouble header file or CAP metadata file). 384 */ 385 struct inode *hfs_iget(struct super_block *sb, struct hfs_cat_key *key, hfs_cat_rec *rec) 386 { 387 struct hfs_iget_data data = { key, rec }; 388 struct inode *inode; 389 u32 cnid; 390 391 switch (rec->type) { 392 case HFS_CDR_DIR: 393 cnid = be32_to_cpu(rec->dir.DirID); 394 break; 395 case HFS_CDR_FIL: 396 cnid = be32_to_cpu(rec->file.FlNum); 397 break; 398 default: 399 return NULL; 400 } 401 inode = iget5_locked(sb, cnid, hfs_test_inode, hfs_read_inode, &data); 402 if (inode && (inode->i_state & I_NEW)) 403 unlock_new_inode(inode); 404 return inode; 405 } 406 407 void hfs_inode_write_fork(struct inode *inode, struct hfs_extent *ext, 408 __be32 *log_size, __be32 *phys_size) 409 { 410 memcpy(ext, HFS_I(inode)->first_extents, sizeof(hfs_extent_rec)); 411 412 if (log_size) 413 *log_size = cpu_to_be32(inode->i_size); 414 if (phys_size) 415 *phys_size = cpu_to_be32(HFS_I(inode)->alloc_blocks * 416 HFS_SB(inode->i_sb)->alloc_blksz); 417 } 418 419 int hfs_write_inode(struct inode *inode, struct writeback_control *wbc) 420 { 421 struct inode *main_inode = inode; 422 struct hfs_find_data fd; 423 hfs_cat_rec rec; 424 int res; 425 426 hfs_dbg(INODE, "hfs_write_inode: %lu\n", inode->i_ino); 427 res = hfs_ext_write_extent(inode); 428 if (res) 429 return res; 430 431 if (inode->i_ino < HFS_FIRSTUSER_CNID) { 432 switch (inode->i_ino) { 433 case HFS_ROOT_CNID: 434 break; 435 case HFS_EXT_CNID: 436 hfs_btree_write(HFS_SB(inode->i_sb)->ext_tree); 437 return 0; 438 case HFS_CAT_CNID: 439 hfs_btree_write(HFS_SB(inode->i_sb)->cat_tree); 440 return 0; 441 default: 442 BUG(); 443 return -EIO; 444 } 445 } 446 447 if (HFS_IS_RSRC(inode)) 448 main_inode = HFS_I(inode)->rsrc_inode; 449 450 if (!main_inode->i_nlink) 451 return 0; 452 453 if (hfs_find_init(HFS_SB(main_inode->i_sb)->cat_tree, &fd)) 454 /* panic? */ 455 return -EIO; 456 457 res = -EIO; 458 if (HFS_I(main_inode)->cat_key.CName.len > HFS_NAMELEN) 459 goto out; 460 fd.search_key->cat = HFS_I(main_inode)->cat_key; 461 if (hfs_brec_find(&fd)) 462 goto out; 463 464 if (S_ISDIR(main_inode->i_mode)) { 465 if (fd.entrylength < sizeof(struct hfs_cat_dir)) 466 goto out; 467 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, 468 sizeof(struct hfs_cat_dir)); 469 if (rec.type != HFS_CDR_DIR || 470 be32_to_cpu(rec.dir.DirID) != inode->i_ino) { 471 } 472 473 rec.dir.MdDat = hfs_u_to_mtime(inode_get_mtime(inode)); 474 rec.dir.Val = cpu_to_be16(inode->i_size - 2); 475 476 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, 477 sizeof(struct hfs_cat_dir)); 478 } else if (HFS_IS_RSRC(inode)) { 479 if (fd.entrylength < sizeof(struct hfs_cat_file)) 480 goto out; 481 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, 482 sizeof(struct hfs_cat_file)); 483 hfs_inode_write_fork(inode, rec.file.RExtRec, 484 &rec.file.RLgLen, &rec.file.RPyLen); 485 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, 486 sizeof(struct hfs_cat_file)); 487 } else { 488 if (fd.entrylength < sizeof(struct hfs_cat_file)) 489 goto out; 490 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, 491 sizeof(struct hfs_cat_file)); 492 if (rec.type != HFS_CDR_FIL || 493 be32_to_cpu(rec.file.FlNum) != inode->i_ino) { 494 } 495 496 if (inode->i_mode & S_IWUSR) 497 rec.file.Flags &= ~HFS_FIL_LOCK; 498 else 499 rec.file.Flags |= HFS_FIL_LOCK; 500 hfs_inode_write_fork(inode, rec.file.ExtRec, &rec.file.LgLen, &rec.file.PyLen); 501 rec.file.MdDat = hfs_u_to_mtime(inode_get_mtime(inode)); 502 503 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, 504 sizeof(struct hfs_cat_file)); 505 } 506 res = 0; 507 out: 508 hfs_find_exit(&fd); 509 return res; 510 } 511 512 static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry, 513 unsigned int flags) 514 { 515 struct inode *inode = NULL; 516 hfs_cat_rec rec; 517 struct hfs_find_data fd; 518 int res; 519 520 if (HFS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc")) 521 goto out; 522 523 inode = HFS_I(dir)->rsrc_inode; 524 if (inode) 525 goto out; 526 527 inode = new_inode(dir->i_sb); 528 if (!inode) 529 return ERR_PTR(-ENOMEM); 530 531 res = hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd); 532 if (res) { 533 iput(inode); 534 return ERR_PTR(res); 535 } 536 fd.search_key->cat = HFS_I(dir)->cat_key; 537 res = hfs_brec_read(&fd, &rec, sizeof(rec)); 538 if (!res) { 539 struct hfs_iget_data idata = { NULL, &rec }; 540 hfs_read_inode(inode, &idata); 541 } 542 hfs_find_exit(&fd); 543 if (res) { 544 iput(inode); 545 return ERR_PTR(res); 546 } 547 HFS_I(inode)->rsrc_inode = dir; 548 HFS_I(dir)->rsrc_inode = inode; 549 igrab(dir); 550 inode_fake_hash(inode); 551 mark_inode_dirty(inode); 552 dont_mount(dentry); 553 out: 554 return d_splice_alias(inode, dentry); 555 } 556 557 void hfs_evict_inode(struct inode *inode) 558 { 559 truncate_inode_pages_final(&inode->i_data); 560 clear_inode(inode); 561 if (HFS_IS_RSRC(inode) && HFS_I(inode)->rsrc_inode) { 562 HFS_I(HFS_I(inode)->rsrc_inode)->rsrc_inode = NULL; 563 iput(HFS_I(inode)->rsrc_inode); 564 } 565 } 566 567 static int hfs_file_open(struct inode *inode, struct file *file) 568 { 569 if (HFS_IS_RSRC(inode)) 570 inode = HFS_I(inode)->rsrc_inode; 571 atomic_inc(&HFS_I(inode)->opencnt); 572 return 0; 573 } 574 575 static int hfs_file_release(struct inode *inode, struct file *file) 576 { 577 //struct super_block *sb = inode->i_sb; 578 579 if (HFS_IS_RSRC(inode)) 580 inode = HFS_I(inode)->rsrc_inode; 581 if (atomic_dec_and_test(&HFS_I(inode)->opencnt)) { 582 inode_lock(inode); 583 hfs_file_truncate(inode); 584 //if (inode->i_flags & S_DEAD) { 585 // hfs_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL); 586 // hfs_delete_inode(inode); 587 //} 588 inode_unlock(inode); 589 } 590 return 0; 591 } 592 593 /* 594 * hfs_notify_change() 595 * 596 * Based very closely on fs/msdos/inode.c by Werner Almesberger 597 * 598 * This is the notify_change() field in the super_operations structure 599 * for HFS file systems. The purpose is to take that changes made to 600 * an inode and apply then in a filesystem-dependent manner. In this 601 * case the process has a few of tasks to do: 602 * 1) prevent changes to the i_uid and i_gid fields. 603 * 2) map file permissions to the closest allowable permissions 604 * 3) Since multiple Linux files can share the same on-disk inode under 605 * HFS (for instance the data and resource forks of a file) a change 606 * to permissions must be applied to all other in-core inodes which 607 * correspond to the same HFS file. 608 */ 609 610 int hfs_inode_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 611 struct iattr *attr) 612 { 613 struct inode *inode = d_inode(dentry); 614 struct hfs_sb_info *hsb = HFS_SB(inode->i_sb); 615 int error; 616 617 error = setattr_prepare(&nop_mnt_idmap, dentry, 618 attr); /* basic permission checks */ 619 if (error) 620 return error; 621 622 /* no uig/gid changes and limit which mode bits can be set */ 623 if (((attr->ia_valid & ATTR_UID) && 624 (!uid_eq(attr->ia_uid, hsb->s_uid))) || 625 ((attr->ia_valid & ATTR_GID) && 626 (!gid_eq(attr->ia_gid, hsb->s_gid))) || 627 ((attr->ia_valid & ATTR_MODE) && 628 ((S_ISDIR(inode->i_mode) && 629 (attr->ia_mode != inode->i_mode)) || 630 (attr->ia_mode & ~HFS_VALID_MODE_BITS)))) { 631 return hsb->s_quiet ? 0 : error; 632 } 633 634 if (attr->ia_valid & ATTR_MODE) { 635 /* Only the 'w' bits can ever change and only all together. */ 636 if (attr->ia_mode & S_IWUSR) 637 attr->ia_mode = inode->i_mode | S_IWUGO; 638 else 639 attr->ia_mode = inode->i_mode & ~S_IWUGO; 640 attr->ia_mode &= S_ISDIR(inode->i_mode) ? ~hsb->s_dir_umask: ~hsb->s_file_umask; 641 } 642 643 if ((attr->ia_valid & ATTR_SIZE) && 644 attr->ia_size != i_size_read(inode)) { 645 inode_dio_wait(inode); 646 647 error = inode_newsize_ok(inode, attr->ia_size); 648 if (error) 649 return error; 650 651 truncate_setsize(inode, attr->ia_size); 652 hfs_file_truncate(inode); 653 simple_inode_init_ts(inode); 654 } 655 656 setattr_copy(&nop_mnt_idmap, inode, attr); 657 mark_inode_dirty(inode); 658 return 0; 659 } 660 661 static int hfs_file_fsync(struct file *filp, loff_t start, loff_t end, 662 int datasync) 663 { 664 struct inode *inode = filp->f_mapping->host; 665 struct super_block * sb; 666 int ret, err; 667 668 ret = file_write_and_wait_range(filp, start, end); 669 if (ret) 670 return ret; 671 inode_lock(inode); 672 673 /* sync the inode to buffers */ 674 ret = write_inode_now(inode, 0); 675 676 /* sync the superblock to buffers */ 677 sb = inode->i_sb; 678 flush_delayed_work(&HFS_SB(sb)->mdb_work); 679 /* .. finally sync the buffers to disk */ 680 err = sync_blockdev(sb->s_bdev); 681 if (!ret) 682 ret = err; 683 inode_unlock(inode); 684 return ret; 685 } 686 687 static const struct file_operations hfs_file_operations = { 688 .llseek = generic_file_llseek, 689 .read_iter = generic_file_read_iter, 690 .write_iter = generic_file_write_iter, 691 .mmap = generic_file_mmap, 692 .splice_read = filemap_splice_read, 693 .fsync = hfs_file_fsync, 694 .open = hfs_file_open, 695 .release = hfs_file_release, 696 }; 697 698 static const struct inode_operations hfs_file_inode_operations = { 699 .lookup = hfs_file_lookup, 700 .setattr = hfs_inode_setattr, 701 .listxattr = generic_listxattr, 702 }; 703