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