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