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 #include <linux/blkdev.h> 21 22 #include "hfs_fs.h" 23 #include "btree.h" 24 25 static const struct file_operations hfs_file_operations; 26 static const struct inode_operations hfs_file_inode_operations; 27 28 /*================ Variable-like macros ================*/ 29 30 #define HFS_VALID_MODE_BITS (S_IFREG | S_IFDIR | S_IRWXUGO) 31 32 static int hfs_writepage(struct page *page, struct writeback_control *wbc) 33 { 34 return block_write_full_page(page, hfs_get_block, wbc); 35 } 36 37 static int hfs_readpage(struct file *file, struct page *page) 38 { 39 return block_read_full_page(page, hfs_get_block); 40 } 41 42 static void hfs_write_failed(struct address_space *mapping, loff_t to) 43 { 44 struct inode *inode = mapping->host; 45 46 if (to > inode->i_size) { 47 truncate_pagecache(inode, inode->i_size); 48 hfs_file_truncate(inode); 49 } 50 } 51 52 static int hfs_write_begin(struct file *file, struct address_space *mapping, 53 loff_t pos, unsigned len, unsigned flags, 54 struct page **pagep, void **fsdata) 55 { 56 int ret; 57 58 *pagep = NULL; 59 ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, 60 hfs_get_block, 61 &HFS_I(mapping->host)->phys_size); 62 if (unlikely(ret)) 63 hfs_write_failed(mapping, pos + len); 64 65 return ret; 66 } 67 68 static sector_t hfs_bmap(struct address_space *mapping, sector_t block) 69 { 70 return generic_block_bmap(mapping, block, hfs_get_block); 71 } 72 73 static int hfs_releasepage(struct page *page, gfp_t mask) 74 { 75 struct inode *inode = page->mapping->host; 76 struct super_block *sb = inode->i_sb; 77 struct hfs_btree *tree; 78 struct hfs_bnode *node; 79 u32 nidx; 80 int i, res = 1; 81 82 switch (inode->i_ino) { 83 case HFS_EXT_CNID: 84 tree = HFS_SB(sb)->ext_tree; 85 break; 86 case HFS_CAT_CNID: 87 tree = HFS_SB(sb)->cat_tree; 88 break; 89 default: 90 BUG(); 91 return 0; 92 } 93 94 if (!tree) 95 return 0; 96 97 if (tree->node_size >= PAGE_SIZE) { 98 nidx = page->index >> (tree->node_size_shift - PAGE_SHIFT); 99 spin_lock(&tree->hash_lock); 100 node = hfs_bnode_findhash(tree, nidx); 101 if (!node) 102 ; 103 else if (atomic_read(&node->refcnt)) 104 res = 0; 105 if (res && node) { 106 hfs_bnode_unhash(node); 107 hfs_bnode_free(node); 108 } 109 spin_unlock(&tree->hash_lock); 110 } else { 111 nidx = page->index << (PAGE_SHIFT - tree->node_size_shift); 112 i = 1 << (PAGE_SHIFT - tree->node_size_shift); 113 spin_lock(&tree->hash_lock); 114 do { 115 node = hfs_bnode_findhash(tree, nidx++); 116 if (!node) 117 continue; 118 if (atomic_read(&node->refcnt)) { 119 res = 0; 120 break; 121 } 122 hfs_bnode_unhash(node); 123 hfs_bnode_free(node); 124 } while (--i && nidx < tree->node_count); 125 spin_unlock(&tree->hash_lock); 126 } 127 return res ? try_to_free_buffers(page) : 0; 128 } 129 130 static ssize_t hfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) 131 { 132 struct file *file = iocb->ki_filp; 133 struct address_space *mapping = file->f_mapping; 134 struct inode *inode = mapping->host; 135 size_t count = iov_iter_count(iter); 136 ssize_t ret; 137 138 ret = blockdev_direct_IO(iocb, inode, iter, hfs_get_block); 139 140 /* 141 * In case of error extending write may have instantiated a few 142 * blocks outside i_size. Trim these off again. 143 */ 144 if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) { 145 loff_t isize = i_size_read(inode); 146 loff_t end = iocb->ki_pos + count; 147 148 if (end > isize) 149 hfs_write_failed(mapping, end); 150 } 151 152 return ret; 153 } 154 155 static int hfs_writepages(struct address_space *mapping, 156 struct writeback_control *wbc) 157 { 158 return mpage_writepages(mapping, wbc, hfs_get_block); 159 } 160 161 const struct address_space_operations hfs_btree_aops = { 162 .readpage = hfs_readpage, 163 .writepage = hfs_writepage, 164 .write_begin = hfs_write_begin, 165 .write_end = generic_write_end, 166 .bmap = hfs_bmap, 167 .releasepage = hfs_releasepage, 168 }; 169 170 const struct address_space_operations hfs_aops = { 171 .readpage = hfs_readpage, 172 .writepage = hfs_writepage, 173 .write_begin = hfs_write_begin, 174 .write_end = generic_write_end, 175 .bmap = hfs_bmap, 176 .direct_IO = hfs_direct_IO, 177 .writepages = hfs_writepages, 178 }; 179 180 /* 181 * hfs_new_inode 182 */ 183 struct inode *hfs_new_inode(struct inode *dir, const struct qstr *name, umode_t mode) 184 { 185 struct super_block *sb = dir->i_sb; 186 struct inode *inode = new_inode(sb); 187 if (!inode) 188 return NULL; 189 190 mutex_init(&HFS_I(inode)->extents_lock); 191 INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list); 192 spin_lock_init(&HFS_I(inode)->open_dir_lock); 193 hfs_cat_build_key(sb, (btree_key *)&HFS_I(inode)->cat_key, dir->i_ino, name); 194 inode->i_ino = HFS_SB(sb)->next_id++; 195 inode->i_mode = mode; 196 inode->i_uid = current_fsuid(); 197 inode->i_gid = current_fsgid(); 198 set_nlink(inode, 1); 199 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); 200 HFS_I(inode)->flags = 0; 201 HFS_I(inode)->rsrc_inode = NULL; 202 HFS_I(inode)->fs_blocks = 0; 203 if (S_ISDIR(mode)) { 204 inode->i_size = 2; 205 HFS_SB(sb)->folder_count++; 206 if (dir->i_ino == HFS_ROOT_CNID) 207 HFS_SB(sb)->root_dirs++; 208 inode->i_op = &hfs_dir_inode_operations; 209 inode->i_fop = &hfs_dir_operations; 210 inode->i_mode |= S_IRWXUGO; 211 inode->i_mode &= ~HFS_SB(inode->i_sb)->s_dir_umask; 212 } else if (S_ISREG(mode)) { 213 HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks; 214 HFS_SB(sb)->file_count++; 215 if (dir->i_ino == HFS_ROOT_CNID) 216 HFS_SB(sb)->root_files++; 217 inode->i_op = &hfs_file_inode_operations; 218 inode->i_fop = &hfs_file_operations; 219 inode->i_mapping->a_ops = &hfs_aops; 220 inode->i_mode |= S_IRUGO|S_IXUGO; 221 if (mode & S_IWUSR) 222 inode->i_mode |= S_IWUGO; 223 inode->i_mode &= ~HFS_SB(inode->i_sb)->s_file_umask; 224 HFS_I(inode)->phys_size = 0; 225 HFS_I(inode)->alloc_blocks = 0; 226 HFS_I(inode)->first_blocks = 0; 227 HFS_I(inode)->cached_start = 0; 228 HFS_I(inode)->cached_blocks = 0; 229 memset(HFS_I(inode)->first_extents, 0, sizeof(hfs_extent_rec)); 230 memset(HFS_I(inode)->cached_extents, 0, sizeof(hfs_extent_rec)); 231 } 232 insert_inode_hash(inode); 233 mark_inode_dirty(inode); 234 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); 235 hfs_mark_mdb_dirty(sb); 236 237 return inode; 238 } 239 240 void hfs_delete_inode(struct inode *inode) 241 { 242 struct super_block *sb = inode->i_sb; 243 244 hfs_dbg(INODE, "delete_inode: %lu\n", inode->i_ino); 245 if (S_ISDIR(inode->i_mode)) { 246 HFS_SB(sb)->folder_count--; 247 if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID)) 248 HFS_SB(sb)->root_dirs--; 249 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); 250 hfs_mark_mdb_dirty(sb); 251 return; 252 } 253 HFS_SB(sb)->file_count--; 254 if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID)) 255 HFS_SB(sb)->root_files--; 256 if (S_ISREG(inode->i_mode)) { 257 if (!inode->i_nlink) { 258 inode->i_size = 0; 259 hfs_file_truncate(inode); 260 } 261 } 262 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); 263 hfs_mark_mdb_dirty(sb); 264 } 265 266 void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext, 267 __be32 __log_size, __be32 phys_size, u32 clump_size) 268 { 269 struct super_block *sb = inode->i_sb; 270 u32 log_size = be32_to_cpu(__log_size); 271 u16 count; 272 int i; 273 274 memcpy(HFS_I(inode)->first_extents, ext, sizeof(hfs_extent_rec)); 275 for (count = 0, i = 0; i < 3; i++) 276 count += be16_to_cpu(ext[i].count); 277 HFS_I(inode)->first_blocks = count; 278 279 inode->i_size = HFS_I(inode)->phys_size = log_size; 280 HFS_I(inode)->fs_blocks = (log_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 281 inode_set_bytes(inode, HFS_I(inode)->fs_blocks << sb->s_blocksize_bits); 282 HFS_I(inode)->alloc_blocks = be32_to_cpu(phys_size) / 283 HFS_SB(sb)->alloc_blksz; 284 HFS_I(inode)->clump_blocks = clump_size / HFS_SB(sb)->alloc_blksz; 285 if (!HFS_I(inode)->clump_blocks) 286 HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks; 287 } 288 289 struct hfs_iget_data { 290 struct hfs_cat_key *key; 291 hfs_cat_rec *rec; 292 }; 293 294 static int hfs_test_inode(struct inode *inode, void *data) 295 { 296 struct hfs_iget_data *idata = data; 297 hfs_cat_rec *rec; 298 299 rec = idata->rec; 300 switch (rec->type) { 301 case HFS_CDR_DIR: 302 return inode->i_ino == be32_to_cpu(rec->dir.DirID); 303 case HFS_CDR_FIL: 304 return inode->i_ino == be32_to_cpu(rec->file.FlNum); 305 default: 306 BUG(); 307 return 1; 308 } 309 } 310 311 /* 312 * hfs_read_inode 313 */ 314 static int hfs_read_inode(struct inode *inode, void *data) 315 { 316 struct hfs_iget_data *idata = data; 317 struct hfs_sb_info *hsb = HFS_SB(inode->i_sb); 318 hfs_cat_rec *rec; 319 320 HFS_I(inode)->flags = 0; 321 HFS_I(inode)->rsrc_inode = NULL; 322 mutex_init(&HFS_I(inode)->extents_lock); 323 INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list); 324 spin_lock_init(&HFS_I(inode)->open_dir_lock); 325 326 /* Initialize the inode */ 327 inode->i_uid = hsb->s_uid; 328 inode->i_gid = hsb->s_gid; 329 set_nlink(inode, 1); 330 331 if (idata->key) 332 HFS_I(inode)->cat_key = *idata->key; 333 else 334 HFS_I(inode)->flags |= HFS_FLG_RSRC; 335 HFS_I(inode)->tz_secondswest = sys_tz.tz_minuteswest * 60; 336 337 rec = idata->rec; 338 switch (rec->type) { 339 case HFS_CDR_FIL: 340 if (!HFS_IS_RSRC(inode)) { 341 hfs_inode_read_fork(inode, rec->file.ExtRec, rec->file.LgLen, 342 rec->file.PyLen, be16_to_cpu(rec->file.ClpSize)); 343 } else { 344 hfs_inode_read_fork(inode, rec->file.RExtRec, rec->file.RLgLen, 345 rec->file.RPyLen, be16_to_cpu(rec->file.ClpSize)); 346 } 347 348 inode->i_ino = be32_to_cpu(rec->file.FlNum); 349 inode->i_mode = S_IRUGO | S_IXUGO; 350 if (!(rec->file.Flags & HFS_FIL_LOCK)) 351 inode->i_mode |= S_IWUGO; 352 inode->i_mode &= ~hsb->s_file_umask; 353 inode->i_mode |= S_IFREG; 354 inode->i_ctime = inode->i_atime = inode->i_mtime = 355 hfs_m_to_utime(rec->file.MdDat); 356 inode->i_op = &hfs_file_inode_operations; 357 inode->i_fop = &hfs_file_operations; 358 inode->i_mapping->a_ops = &hfs_aops; 359 break; 360 case HFS_CDR_DIR: 361 inode->i_ino = be32_to_cpu(rec->dir.DirID); 362 inode->i_size = be16_to_cpu(rec->dir.Val) + 2; 363 HFS_I(inode)->fs_blocks = 0; 364 inode->i_mode = S_IFDIR | (S_IRWXUGO & ~hsb->s_dir_umask); 365 inode->i_ctime = inode->i_atime = inode->i_mtime = 366 hfs_m_to_utime(rec->dir.MdDat); 367 inode->i_op = &hfs_dir_inode_operations; 368 inode->i_fop = &hfs_dir_operations; 369 break; 370 default: 371 make_bad_inode(inode); 372 } 373 return 0; 374 } 375 376 /* 377 * __hfs_iget() 378 * 379 * Given the MDB for a HFS filesystem, a 'key' and an 'entry' in 380 * the catalog B-tree and the 'type' of the desired file return the 381 * inode for that file/directory or NULL. Note that 'type' indicates 382 * whether we want the actual file or directory, or the corresponding 383 * metadata (AppleDouble header file or CAP metadata file). 384 */ 385 struct inode *hfs_iget(struct super_block *sb, struct hfs_cat_key *key, hfs_cat_rec *rec) 386 { 387 struct hfs_iget_data data = { key, rec }; 388 struct inode *inode; 389 u32 cnid; 390 391 switch (rec->type) { 392 case HFS_CDR_DIR: 393 cnid = be32_to_cpu(rec->dir.DirID); 394 break; 395 case HFS_CDR_FIL: 396 cnid = be32_to_cpu(rec->file.FlNum); 397 break; 398 default: 399 return NULL; 400 } 401 inode = iget5_locked(sb, cnid, hfs_test_inode, hfs_read_inode, &data); 402 if (inode && (inode->i_state & I_NEW)) 403 unlock_new_inode(inode); 404 return inode; 405 } 406 407 void hfs_inode_write_fork(struct inode *inode, struct hfs_extent *ext, 408 __be32 *log_size, __be32 *phys_size) 409 { 410 memcpy(ext, HFS_I(inode)->first_extents, sizeof(hfs_extent_rec)); 411 412 if (log_size) 413 *log_size = cpu_to_be32(inode->i_size); 414 if (phys_size) 415 *phys_size = cpu_to_be32(HFS_I(inode)->alloc_blocks * 416 HFS_SB(inode->i_sb)->alloc_blksz); 417 } 418 419 int hfs_write_inode(struct inode *inode, struct writeback_control *wbc) 420 { 421 struct inode *main_inode = inode; 422 struct hfs_find_data fd; 423 hfs_cat_rec rec; 424 int res; 425 426 hfs_dbg(INODE, "hfs_write_inode: %lu\n", inode->i_ino); 427 res = hfs_ext_write_extent(inode); 428 if (res) 429 return res; 430 431 if (inode->i_ino < HFS_FIRSTUSER_CNID) { 432 switch (inode->i_ino) { 433 case HFS_ROOT_CNID: 434 break; 435 case HFS_EXT_CNID: 436 hfs_btree_write(HFS_SB(inode->i_sb)->ext_tree); 437 return 0; 438 case HFS_CAT_CNID: 439 hfs_btree_write(HFS_SB(inode->i_sb)->cat_tree); 440 return 0; 441 default: 442 BUG(); 443 return -EIO; 444 } 445 } 446 447 if (HFS_IS_RSRC(inode)) 448 main_inode = HFS_I(inode)->rsrc_inode; 449 450 if (!main_inode->i_nlink) 451 return 0; 452 453 if (hfs_find_init(HFS_SB(main_inode->i_sb)->cat_tree, &fd)) 454 /* panic? */ 455 return -EIO; 456 457 fd.search_key->cat = HFS_I(main_inode)->cat_key; 458 if (hfs_brec_find(&fd)) 459 /* panic? */ 460 goto out; 461 462 if (S_ISDIR(main_inode->i_mode)) { 463 if (fd.entrylength < sizeof(struct hfs_cat_dir)) 464 /* panic? */; 465 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, 466 sizeof(struct hfs_cat_dir)); 467 if (rec.type != HFS_CDR_DIR || 468 be32_to_cpu(rec.dir.DirID) != inode->i_ino) { 469 } 470 471 rec.dir.MdDat = hfs_u_to_mtime(inode->i_mtime); 472 rec.dir.Val = cpu_to_be16(inode->i_size - 2); 473 474 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, 475 sizeof(struct hfs_cat_dir)); 476 } else if (HFS_IS_RSRC(inode)) { 477 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, 478 sizeof(struct hfs_cat_file)); 479 hfs_inode_write_fork(inode, rec.file.RExtRec, 480 &rec.file.RLgLen, &rec.file.RPyLen); 481 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, 482 sizeof(struct hfs_cat_file)); 483 } else { 484 if (fd.entrylength < sizeof(struct hfs_cat_file)) 485 /* panic? */; 486 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, 487 sizeof(struct hfs_cat_file)); 488 if (rec.type != HFS_CDR_FIL || 489 be32_to_cpu(rec.file.FlNum) != inode->i_ino) { 490 } 491 492 if (inode->i_mode & S_IWUSR) 493 rec.file.Flags &= ~HFS_FIL_LOCK; 494 else 495 rec.file.Flags |= HFS_FIL_LOCK; 496 hfs_inode_write_fork(inode, rec.file.ExtRec, &rec.file.LgLen, &rec.file.PyLen); 497 rec.file.MdDat = hfs_u_to_mtime(inode->i_mtime); 498 499 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, 500 sizeof(struct hfs_cat_file)); 501 } 502 out: 503 hfs_find_exit(&fd); 504 return 0; 505 } 506 507 static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry, 508 unsigned int flags) 509 { 510 struct inode *inode = NULL; 511 hfs_cat_rec rec; 512 struct hfs_find_data fd; 513 int res; 514 515 if (HFS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc")) 516 goto out; 517 518 inode = HFS_I(dir)->rsrc_inode; 519 if (inode) 520 goto out; 521 522 inode = new_inode(dir->i_sb); 523 if (!inode) 524 return ERR_PTR(-ENOMEM); 525 526 res = hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd); 527 if (res) { 528 iput(inode); 529 return ERR_PTR(res); 530 } 531 fd.search_key->cat = HFS_I(dir)->cat_key; 532 res = hfs_brec_read(&fd, &rec, sizeof(rec)); 533 if (!res) { 534 struct hfs_iget_data idata = { NULL, &rec }; 535 hfs_read_inode(inode, &idata); 536 } 537 hfs_find_exit(&fd); 538 if (res) { 539 iput(inode); 540 return ERR_PTR(res); 541 } 542 HFS_I(inode)->rsrc_inode = dir; 543 HFS_I(dir)->rsrc_inode = inode; 544 igrab(dir); 545 inode_fake_hash(inode); 546 mark_inode_dirty(inode); 547 dont_mount(dentry); 548 out: 549 return d_splice_alias(inode, dentry); 550 } 551 552 void hfs_evict_inode(struct inode *inode) 553 { 554 truncate_inode_pages_final(&inode->i_data); 555 clear_inode(inode); 556 if (HFS_IS_RSRC(inode) && HFS_I(inode)->rsrc_inode) { 557 HFS_I(HFS_I(inode)->rsrc_inode)->rsrc_inode = NULL; 558 iput(HFS_I(inode)->rsrc_inode); 559 } 560 } 561 562 static int hfs_file_open(struct inode *inode, struct file *file) 563 { 564 if (HFS_IS_RSRC(inode)) 565 inode = HFS_I(inode)->rsrc_inode; 566 atomic_inc(&HFS_I(inode)->opencnt); 567 return 0; 568 } 569 570 static int hfs_file_release(struct inode *inode, struct file *file) 571 { 572 //struct super_block *sb = inode->i_sb; 573 574 if (HFS_IS_RSRC(inode)) 575 inode = HFS_I(inode)->rsrc_inode; 576 if (atomic_dec_and_test(&HFS_I(inode)->opencnt)) { 577 inode_lock(inode); 578 hfs_file_truncate(inode); 579 //if (inode->i_flags & S_DEAD) { 580 // hfs_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL); 581 // hfs_delete_inode(inode); 582 //} 583 inode_unlock(inode); 584 } 585 return 0; 586 } 587 588 /* 589 * hfs_notify_change() 590 * 591 * Based very closely on fs/msdos/inode.c by Werner Almesberger 592 * 593 * This is the notify_change() field in the super_operations structure 594 * for HFS file systems. The purpose is to take that changes made to 595 * an inode and apply then in a filesystem-dependent manner. In this 596 * case the process has a few of tasks to do: 597 * 1) prevent changes to the i_uid and i_gid fields. 598 * 2) map file permissions to the closest allowable permissions 599 * 3) Since multiple Linux files can share the same on-disk inode under 600 * HFS (for instance the data and resource forks of a file) a change 601 * to permissions must be applied to all other in-core inodes which 602 * correspond to the same HFS file. 603 */ 604 605 int hfs_inode_setattr(struct dentry *dentry, struct iattr * attr) 606 { 607 struct inode *inode = d_inode(dentry); 608 struct hfs_sb_info *hsb = HFS_SB(inode->i_sb); 609 int error; 610 611 error = setattr_prepare(&init_user_ns, dentry, attr); /* basic permission checks */ 612 if (error) 613 return error; 614 615 /* no uig/gid changes and limit which mode bits can be set */ 616 if (((attr->ia_valid & ATTR_UID) && 617 (!uid_eq(attr->ia_uid, hsb->s_uid))) || 618 ((attr->ia_valid & ATTR_GID) && 619 (!gid_eq(attr->ia_gid, hsb->s_gid))) || 620 ((attr->ia_valid & ATTR_MODE) && 621 ((S_ISDIR(inode->i_mode) && 622 (attr->ia_mode != inode->i_mode)) || 623 (attr->ia_mode & ~HFS_VALID_MODE_BITS)))) { 624 return hsb->s_quiet ? 0 : error; 625 } 626 627 if (attr->ia_valid & ATTR_MODE) { 628 /* Only the 'w' bits can ever change and only all together. */ 629 if (attr->ia_mode & S_IWUSR) 630 attr->ia_mode = inode->i_mode | S_IWUGO; 631 else 632 attr->ia_mode = inode->i_mode & ~S_IWUGO; 633 attr->ia_mode &= S_ISDIR(inode->i_mode) ? ~hsb->s_dir_umask: ~hsb->s_file_umask; 634 } 635 636 if ((attr->ia_valid & ATTR_SIZE) && 637 attr->ia_size != i_size_read(inode)) { 638 inode_dio_wait(inode); 639 640 error = inode_newsize_ok(inode, attr->ia_size); 641 if (error) 642 return error; 643 644 truncate_setsize(inode, attr->ia_size); 645 hfs_file_truncate(inode); 646 inode->i_atime = inode->i_mtime = inode->i_ctime = 647 current_time(inode); 648 } 649 650 setattr_copy(&init_user_ns, inode, attr); 651 mark_inode_dirty(inode); 652 return 0; 653 } 654 655 static int hfs_file_fsync(struct file *filp, loff_t start, loff_t end, 656 int datasync) 657 { 658 struct inode *inode = filp->f_mapping->host; 659 struct super_block * sb; 660 int ret, err; 661 662 ret = file_write_and_wait_range(filp, start, end); 663 if (ret) 664 return ret; 665 inode_lock(inode); 666 667 /* sync the inode to buffers */ 668 ret = write_inode_now(inode, 0); 669 670 /* sync the superblock to buffers */ 671 sb = inode->i_sb; 672 flush_delayed_work(&HFS_SB(sb)->mdb_work); 673 /* .. finally sync the buffers to disk */ 674 err = sync_blockdev(sb->s_bdev); 675 if (!ret) 676 ret = err; 677 inode_unlock(inode); 678 return ret; 679 } 680 681 static const struct file_operations hfs_file_operations = { 682 .llseek = generic_file_llseek, 683 .read_iter = generic_file_read_iter, 684 .write_iter = generic_file_write_iter, 685 .mmap = generic_file_mmap, 686 .splice_read = generic_file_splice_read, 687 .fsync = hfs_file_fsync, 688 .open = hfs_file_open, 689 .release = hfs_file_release, 690 }; 691 692 static const struct inode_operations hfs_file_inode_operations = { 693 .lookup = hfs_file_lookup, 694 .setattr = hfs_inode_setattr, 695 .listxattr = generic_listxattr, 696 }; 697