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