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 21 #include "hfs_fs.h" 22 #include "btree.h" 23 24 static const struct file_operations hfs_file_operations; 25 static const struct inode_operations hfs_file_inode_operations; 26 27 /*================ Variable-like macros ================*/ 28 29 #define HFS_VALID_MODE_BITS (S_IFREG | S_IFDIR | S_IRWXUGO) 30 31 static int hfs_writepage(struct page *page, struct writeback_control *wbc) 32 { 33 return block_write_full_page(page, hfs_get_block, wbc); 34 } 35 36 static int hfs_readpage(struct file *file, struct page *page) 37 { 38 return block_read_full_page(page, hfs_get_block); 39 } 40 41 static void hfs_write_failed(struct address_space *mapping, loff_t to) 42 { 43 struct inode *inode = mapping->host; 44 45 if (to > inode->i_size) { 46 truncate_pagecache(inode, inode->i_size); 47 hfs_file_truncate(inode); 48 } 49 } 50 51 static int hfs_write_begin(struct file *file, struct address_space *mapping, 52 loff_t pos, unsigned len, unsigned flags, 53 struct page **pagep, void **fsdata) 54 { 55 int ret; 56 57 *pagep = NULL; 58 ret = cont_write_begin(file, mapping, pos, len, flags, 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 .readpage = hfs_readpage, 162 .writepage = hfs_writepage, 163 .write_begin = hfs_write_begin, 164 .write_end = generic_write_end, 165 .bmap = hfs_bmap, 166 .releasepage = hfs_releasepage, 167 }; 168 169 const struct address_space_operations hfs_aops = { 170 .readpage = hfs_readpage, 171 .writepage = hfs_writepage, 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 }; 178 179 /* 180 * hfs_new_inode 181 */ 182 struct inode *hfs_new_inode(struct inode *dir, const struct qstr *name, umode_t mode) 183 { 184 struct super_block *sb = dir->i_sb; 185 struct inode *inode = new_inode(sb); 186 if (!inode) 187 return NULL; 188 189 mutex_init(&HFS_I(inode)->extents_lock); 190 INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list); 191 spin_lock_init(&HFS_I(inode)->open_dir_lock); 192 hfs_cat_build_key(sb, (btree_key *)&HFS_I(inode)->cat_key, dir->i_ino, name); 193 inode->i_ino = HFS_SB(sb)->next_id++; 194 inode->i_mode = mode; 195 inode->i_uid = current_fsuid(); 196 inode->i_gid = current_fsgid(); 197 set_nlink(inode, 1); 198 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); 199 HFS_I(inode)->flags = 0; 200 HFS_I(inode)->rsrc_inode = NULL; 201 HFS_I(inode)->fs_blocks = 0; 202 if (S_ISDIR(mode)) { 203 inode->i_size = 2; 204 HFS_SB(sb)->folder_count++; 205 if (dir->i_ino == HFS_ROOT_CNID) 206 HFS_SB(sb)->root_dirs++; 207 inode->i_op = &hfs_dir_inode_operations; 208 inode->i_fop = &hfs_dir_operations; 209 inode->i_mode |= S_IRWXUGO; 210 inode->i_mode &= ~HFS_SB(inode->i_sb)->s_dir_umask; 211 } else if (S_ISREG(mode)) { 212 HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks; 213 HFS_SB(sb)->file_count++; 214 if (dir->i_ino == HFS_ROOT_CNID) 215 HFS_SB(sb)->root_files++; 216 inode->i_op = &hfs_file_inode_operations; 217 inode->i_fop = &hfs_file_operations; 218 inode->i_mapping->a_ops = &hfs_aops; 219 inode->i_mode |= S_IRUGO|S_IXUGO; 220 if (mode & S_IWUSR) 221 inode->i_mode |= S_IWUGO; 222 inode->i_mode &= ~HFS_SB(inode->i_sb)->s_file_umask; 223 HFS_I(inode)->phys_size = 0; 224 HFS_I(inode)->alloc_blocks = 0; 225 HFS_I(inode)->first_blocks = 0; 226 HFS_I(inode)->cached_start = 0; 227 HFS_I(inode)->cached_blocks = 0; 228 memset(HFS_I(inode)->first_extents, 0, sizeof(hfs_extent_rec)); 229 memset(HFS_I(inode)->cached_extents, 0, sizeof(hfs_extent_rec)); 230 } 231 insert_inode_hash(inode); 232 mark_inode_dirty(inode); 233 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); 234 hfs_mark_mdb_dirty(sb); 235 236 return inode; 237 } 238 239 void hfs_delete_inode(struct inode *inode) 240 { 241 struct super_block *sb = inode->i_sb; 242 243 hfs_dbg(INODE, "delete_inode: %lu\n", inode->i_ino); 244 if (S_ISDIR(inode->i_mode)) { 245 HFS_SB(sb)->folder_count--; 246 if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID)) 247 HFS_SB(sb)->root_dirs--; 248 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); 249 hfs_mark_mdb_dirty(sb); 250 return; 251 } 252 HFS_SB(sb)->file_count--; 253 if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID)) 254 HFS_SB(sb)->root_files--; 255 if (S_ISREG(inode->i_mode)) { 256 if (!inode->i_nlink) { 257 inode->i_size = 0; 258 hfs_file_truncate(inode); 259 } 260 } 261 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); 262 hfs_mark_mdb_dirty(sb); 263 } 264 265 void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext, 266 __be32 __log_size, __be32 phys_size, u32 clump_size) 267 { 268 struct super_block *sb = inode->i_sb; 269 u32 log_size = be32_to_cpu(__log_size); 270 u16 count; 271 int i; 272 273 memcpy(HFS_I(inode)->first_extents, ext, sizeof(hfs_extent_rec)); 274 for (count = 0, i = 0; i < 3; i++) 275 count += be16_to_cpu(ext[i].count); 276 HFS_I(inode)->first_blocks = count; 277 278 inode->i_size = HFS_I(inode)->phys_size = log_size; 279 HFS_I(inode)->fs_blocks = (log_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 280 inode_set_bytes(inode, HFS_I(inode)->fs_blocks << sb->s_blocksize_bits); 281 HFS_I(inode)->alloc_blocks = be32_to_cpu(phys_size) / 282 HFS_SB(sb)->alloc_blksz; 283 HFS_I(inode)->clump_blocks = clump_size / HFS_SB(sb)->alloc_blksz; 284 if (!HFS_I(inode)->clump_blocks) 285 HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks; 286 } 287 288 struct hfs_iget_data { 289 struct hfs_cat_key *key; 290 hfs_cat_rec *rec; 291 }; 292 293 static int hfs_test_inode(struct inode *inode, void *data) 294 { 295 struct hfs_iget_data *idata = data; 296 hfs_cat_rec *rec; 297 298 rec = idata->rec; 299 switch (rec->type) { 300 case HFS_CDR_DIR: 301 return inode->i_ino == be32_to_cpu(rec->dir.DirID); 302 case HFS_CDR_FIL: 303 return inode->i_ino == be32_to_cpu(rec->file.FlNum); 304 default: 305 BUG(); 306 return 1; 307 } 308 } 309 310 /* 311 * hfs_read_inode 312 */ 313 static int hfs_read_inode(struct inode *inode, void *data) 314 { 315 struct hfs_iget_data *idata = data; 316 struct hfs_sb_info *hsb = HFS_SB(inode->i_sb); 317 hfs_cat_rec *rec; 318 319 HFS_I(inode)->flags = 0; 320 HFS_I(inode)->rsrc_inode = NULL; 321 mutex_init(&HFS_I(inode)->extents_lock); 322 INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list); 323 spin_lock_init(&HFS_I(inode)->open_dir_lock); 324 325 /* Initialize the inode */ 326 inode->i_uid = hsb->s_uid; 327 inode->i_gid = hsb->s_gid; 328 set_nlink(inode, 1); 329 330 if (idata->key) 331 HFS_I(inode)->cat_key = *idata->key; 332 else 333 HFS_I(inode)->flags |= HFS_FLG_RSRC; 334 HFS_I(inode)->tz_secondswest = sys_tz.tz_minuteswest * 60; 335 336 rec = idata->rec; 337 switch (rec->type) { 338 case HFS_CDR_FIL: 339 if (!HFS_IS_RSRC(inode)) { 340 hfs_inode_read_fork(inode, rec->file.ExtRec, rec->file.LgLen, 341 rec->file.PyLen, be16_to_cpu(rec->file.ClpSize)); 342 } else { 343 hfs_inode_read_fork(inode, rec->file.RExtRec, rec->file.RLgLen, 344 rec->file.RPyLen, be16_to_cpu(rec->file.ClpSize)); 345 } 346 347 inode->i_ino = be32_to_cpu(rec->file.FlNum); 348 inode->i_mode = S_IRUGO | S_IXUGO; 349 if (!(rec->file.Flags & HFS_FIL_LOCK)) 350 inode->i_mode |= S_IWUGO; 351 inode->i_mode &= ~hsb->s_file_umask; 352 inode->i_mode |= S_IFREG; 353 inode->i_ctime = inode->i_atime = inode->i_mtime = 354 timespec_to_timespec64(hfs_m_to_utime(rec->file.MdDat)); 355 inode->i_op = &hfs_file_inode_operations; 356 inode->i_fop = &hfs_file_operations; 357 inode->i_mapping->a_ops = &hfs_aops; 358 break; 359 case HFS_CDR_DIR: 360 inode->i_ino = be32_to_cpu(rec->dir.DirID); 361 inode->i_size = be16_to_cpu(rec->dir.Val) + 2; 362 HFS_I(inode)->fs_blocks = 0; 363 inode->i_mode = S_IFDIR | (S_IRWXUGO & ~hsb->s_dir_umask); 364 inode->i_ctime = inode->i_atime = inode->i_mtime = 365 timespec_to_timespec64(hfs_m_to_utime(rec->dir.MdDat)); 366 inode->i_op = &hfs_dir_inode_operations; 367 inode->i_fop = &hfs_dir_operations; 368 break; 369 default: 370 make_bad_inode(inode); 371 } 372 return 0; 373 } 374 375 /* 376 * __hfs_iget() 377 * 378 * Given the MDB for a HFS filesystem, a 'key' and an 'entry' in 379 * the catalog B-tree and the 'type' of the desired file return the 380 * inode for that file/directory or NULL. Note that 'type' indicates 381 * whether we want the actual file or directory, or the corresponding 382 * metadata (AppleDouble header file or CAP metadata file). 383 */ 384 struct inode *hfs_iget(struct super_block *sb, struct hfs_cat_key *key, hfs_cat_rec *rec) 385 { 386 struct hfs_iget_data data = { key, rec }; 387 struct inode *inode; 388 u32 cnid; 389 390 switch (rec->type) { 391 case HFS_CDR_DIR: 392 cnid = be32_to_cpu(rec->dir.DirID); 393 break; 394 case HFS_CDR_FIL: 395 cnid = be32_to_cpu(rec->file.FlNum); 396 break; 397 default: 398 return NULL; 399 } 400 inode = iget5_locked(sb, cnid, hfs_test_inode, hfs_read_inode, &data); 401 if (inode && (inode->i_state & I_NEW)) 402 unlock_new_inode(inode); 403 return inode; 404 } 405 406 void hfs_inode_write_fork(struct inode *inode, struct hfs_extent *ext, 407 __be32 *log_size, __be32 *phys_size) 408 { 409 memcpy(ext, HFS_I(inode)->first_extents, sizeof(hfs_extent_rec)); 410 411 if (log_size) 412 *log_size = cpu_to_be32(inode->i_size); 413 if (phys_size) 414 *phys_size = cpu_to_be32(HFS_I(inode)->alloc_blocks * 415 HFS_SB(inode->i_sb)->alloc_blksz); 416 } 417 418 int hfs_write_inode(struct inode *inode, struct writeback_control *wbc) 419 { 420 struct inode *main_inode = inode; 421 struct hfs_find_data fd; 422 hfs_cat_rec rec; 423 int res; 424 425 hfs_dbg(INODE, "hfs_write_inode: %lu\n", inode->i_ino); 426 res = hfs_ext_write_extent(inode); 427 if (res) 428 return res; 429 430 if (inode->i_ino < HFS_FIRSTUSER_CNID) { 431 switch (inode->i_ino) { 432 case HFS_ROOT_CNID: 433 break; 434 case HFS_EXT_CNID: 435 hfs_btree_write(HFS_SB(inode->i_sb)->ext_tree); 436 return 0; 437 case HFS_CAT_CNID: 438 hfs_btree_write(HFS_SB(inode->i_sb)->cat_tree); 439 return 0; 440 default: 441 BUG(); 442 return -EIO; 443 } 444 } 445 446 if (HFS_IS_RSRC(inode)) 447 main_inode = HFS_I(inode)->rsrc_inode; 448 449 if (!main_inode->i_nlink) 450 return 0; 451 452 if (hfs_find_init(HFS_SB(main_inode->i_sb)->cat_tree, &fd)) 453 /* panic? */ 454 return -EIO; 455 456 fd.search_key->cat = HFS_I(main_inode)->cat_key; 457 if (hfs_brec_find(&fd)) 458 /* panic? */ 459 goto out; 460 461 if (S_ISDIR(main_inode->i_mode)) { 462 if (fd.entrylength < sizeof(struct hfs_cat_dir)) 463 /* panic? */; 464 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, 465 sizeof(struct hfs_cat_dir)); 466 if (rec.type != HFS_CDR_DIR || 467 be32_to_cpu(rec.dir.DirID) != inode->i_ino) { 468 } 469 470 rec.dir.MdDat = hfs_u_to_mtime(inode->i_mtime); 471 rec.dir.Val = cpu_to_be16(inode->i_size - 2); 472 473 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, 474 sizeof(struct hfs_cat_dir)); 475 } else if (HFS_IS_RSRC(inode)) { 476 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, 477 sizeof(struct hfs_cat_file)); 478 hfs_inode_write_fork(inode, rec.file.RExtRec, 479 &rec.file.RLgLen, &rec.file.RPyLen); 480 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, 481 sizeof(struct hfs_cat_file)); 482 } else { 483 if (fd.entrylength < sizeof(struct hfs_cat_file)) 484 /* panic? */; 485 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, 486 sizeof(struct hfs_cat_file)); 487 if (rec.type != HFS_CDR_FIL || 488 be32_to_cpu(rec.file.FlNum) != inode->i_ino) { 489 } 490 491 if (inode->i_mode & S_IWUSR) 492 rec.file.Flags &= ~HFS_FIL_LOCK; 493 else 494 rec.file.Flags |= HFS_FIL_LOCK; 495 hfs_inode_write_fork(inode, rec.file.ExtRec, &rec.file.LgLen, &rec.file.PyLen); 496 rec.file.MdDat = hfs_u_to_mtime(inode->i_mtime); 497 498 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, 499 sizeof(struct hfs_cat_file)); 500 } 501 out: 502 hfs_find_exit(&fd); 503 return 0; 504 } 505 506 static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry, 507 unsigned int flags) 508 { 509 struct inode *inode = NULL; 510 hfs_cat_rec rec; 511 struct hfs_find_data fd; 512 int res; 513 514 if (HFS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc")) 515 goto out; 516 517 inode = HFS_I(dir)->rsrc_inode; 518 if (inode) 519 goto out; 520 521 inode = new_inode(dir->i_sb); 522 if (!inode) 523 return ERR_PTR(-ENOMEM); 524 525 res = hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd); 526 if (res) { 527 iput(inode); 528 return ERR_PTR(res); 529 } 530 fd.search_key->cat = HFS_I(dir)->cat_key; 531 res = hfs_brec_read(&fd, &rec, sizeof(rec)); 532 if (!res) { 533 struct hfs_iget_data idata = { NULL, &rec }; 534 hfs_read_inode(inode, &idata); 535 } 536 hfs_find_exit(&fd); 537 if (res) { 538 iput(inode); 539 return ERR_PTR(res); 540 } 541 HFS_I(inode)->rsrc_inode = dir; 542 HFS_I(dir)->rsrc_inode = inode; 543 igrab(dir); 544 inode_fake_hash(inode); 545 mark_inode_dirty(inode); 546 dont_mount(dentry); 547 out: 548 return d_splice_alias(inode, dentry); 549 } 550 551 void hfs_evict_inode(struct inode *inode) 552 { 553 truncate_inode_pages_final(&inode->i_data); 554 clear_inode(inode); 555 if (HFS_IS_RSRC(inode) && HFS_I(inode)->rsrc_inode) { 556 HFS_I(HFS_I(inode)->rsrc_inode)->rsrc_inode = NULL; 557 iput(HFS_I(inode)->rsrc_inode); 558 } 559 } 560 561 static int hfs_file_open(struct inode *inode, struct file *file) 562 { 563 if (HFS_IS_RSRC(inode)) 564 inode = HFS_I(inode)->rsrc_inode; 565 atomic_inc(&HFS_I(inode)->opencnt); 566 return 0; 567 } 568 569 static int hfs_file_release(struct inode *inode, struct file *file) 570 { 571 //struct super_block *sb = inode->i_sb; 572 573 if (HFS_IS_RSRC(inode)) 574 inode = HFS_I(inode)->rsrc_inode; 575 if (atomic_dec_and_test(&HFS_I(inode)->opencnt)) { 576 inode_lock(inode); 577 hfs_file_truncate(inode); 578 //if (inode->i_flags & S_DEAD) { 579 // hfs_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL); 580 // hfs_delete_inode(inode); 581 //} 582 inode_unlock(inode); 583 } 584 return 0; 585 } 586 587 /* 588 * hfs_notify_change() 589 * 590 * Based very closely on fs/msdos/inode.c by Werner Almesberger 591 * 592 * This is the notify_change() field in the super_operations structure 593 * for HFS file systems. The purpose is to take that changes made to 594 * an inode and apply then in a filesystem-dependent manner. In this 595 * case the process has a few of tasks to do: 596 * 1) prevent changes to the i_uid and i_gid fields. 597 * 2) map file permissions to the closest allowable permissions 598 * 3) Since multiple Linux files can share the same on-disk inode under 599 * HFS (for instance the data and resource forks of a file) a change 600 * to permissions must be applied to all other in-core inodes which 601 * correspond to the same HFS file. 602 */ 603 604 int hfs_inode_setattr(struct dentry *dentry, struct iattr * attr) 605 { 606 struct inode *inode = d_inode(dentry); 607 struct hfs_sb_info *hsb = HFS_SB(inode->i_sb); 608 int error; 609 610 error = setattr_prepare(dentry, attr); /* basic permission checks */ 611 if (error) 612 return error; 613 614 /* no uig/gid changes and limit which mode bits can be set */ 615 if (((attr->ia_valid & ATTR_UID) && 616 (!uid_eq(attr->ia_uid, hsb->s_uid))) || 617 ((attr->ia_valid & ATTR_GID) && 618 (!gid_eq(attr->ia_gid, hsb->s_gid))) || 619 ((attr->ia_valid & ATTR_MODE) && 620 ((S_ISDIR(inode->i_mode) && 621 (attr->ia_mode != inode->i_mode)) || 622 (attr->ia_mode & ~HFS_VALID_MODE_BITS)))) { 623 return hsb->s_quiet ? 0 : error; 624 } 625 626 if (attr->ia_valid & ATTR_MODE) { 627 /* Only the 'w' bits can ever change and only all together. */ 628 if (attr->ia_mode & S_IWUSR) 629 attr->ia_mode = inode->i_mode | S_IWUGO; 630 else 631 attr->ia_mode = inode->i_mode & ~S_IWUGO; 632 attr->ia_mode &= S_ISDIR(inode->i_mode) ? ~hsb->s_dir_umask: ~hsb->s_file_umask; 633 } 634 635 if ((attr->ia_valid & ATTR_SIZE) && 636 attr->ia_size != i_size_read(inode)) { 637 inode_dio_wait(inode); 638 639 error = inode_newsize_ok(inode, attr->ia_size); 640 if (error) 641 return error; 642 643 truncate_setsize(inode, attr->ia_size); 644 hfs_file_truncate(inode); 645 inode->i_atime = inode->i_mtime = inode->i_ctime = 646 current_time(inode); 647 } 648 649 setattr_copy(inode, attr); 650 mark_inode_dirty(inode); 651 return 0; 652 } 653 654 static int hfs_file_fsync(struct file *filp, loff_t start, loff_t end, 655 int datasync) 656 { 657 struct inode *inode = filp->f_mapping->host; 658 struct super_block * sb; 659 int ret, err; 660 661 ret = file_write_and_wait_range(filp, start, end); 662 if (ret) 663 return ret; 664 inode_lock(inode); 665 666 /* sync the inode to buffers */ 667 ret = write_inode_now(inode, 0); 668 669 /* sync the superblock to buffers */ 670 sb = inode->i_sb; 671 flush_delayed_work(&HFS_SB(sb)->mdb_work); 672 /* .. finally sync the buffers to disk */ 673 err = sync_blockdev(sb->s_bdev); 674 if (!ret) 675 ret = err; 676 inode_unlock(inode); 677 return ret; 678 } 679 680 static const struct file_operations hfs_file_operations = { 681 .llseek = generic_file_llseek, 682 .read_iter = generic_file_read_iter, 683 .write_iter = generic_file_write_iter, 684 .mmap = generic_file_mmap, 685 .splice_read = generic_file_splice_read, 686 .fsync = hfs_file_fsync, 687 .open = hfs_file_open, 688 .release = hfs_file_release, 689 }; 690 691 static const struct inode_operations hfs_file_inode_operations = { 692 .lookup = hfs_file_lookup, 693 .setattr = hfs_inode_setattr, 694 .listxattr = generic_listxattr, 695 }; 696