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