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