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 .set_page_dirty = __set_page_dirty_buffers, 163 .readpage = hfs_readpage, 164 .writepage = hfs_writepage, 165 .write_begin = hfs_write_begin, 166 .write_end = generic_write_end, 167 .bmap = hfs_bmap, 168 .releasepage = hfs_releasepage, 169 }; 170 171 const struct address_space_operations hfs_aops = { 172 .set_page_dirty = __set_page_dirty_buffers, 173 .readpage = hfs_readpage, 174 .writepage = hfs_writepage, 175 .write_begin = hfs_write_begin, 176 .write_end = generic_write_end, 177 .bmap = hfs_bmap, 178 .direct_IO = hfs_direct_IO, 179 .writepages = hfs_writepages, 180 }; 181 182 /* 183 * hfs_new_inode 184 */ 185 struct inode *hfs_new_inode(struct inode *dir, const struct qstr *name, umode_t mode) 186 { 187 struct super_block *sb = dir->i_sb; 188 struct inode *inode = new_inode(sb); 189 if (!inode) 190 return NULL; 191 192 mutex_init(&HFS_I(inode)->extents_lock); 193 INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list); 194 spin_lock_init(&HFS_I(inode)->open_dir_lock); 195 hfs_cat_build_key(sb, (btree_key *)&HFS_I(inode)->cat_key, dir->i_ino, name); 196 inode->i_ino = HFS_SB(sb)->next_id++; 197 inode->i_mode = mode; 198 inode->i_uid = current_fsuid(); 199 inode->i_gid = current_fsgid(); 200 set_nlink(inode, 1); 201 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); 202 HFS_I(inode)->flags = 0; 203 HFS_I(inode)->rsrc_inode = NULL; 204 HFS_I(inode)->fs_blocks = 0; 205 if (S_ISDIR(mode)) { 206 inode->i_size = 2; 207 HFS_SB(sb)->folder_count++; 208 if (dir->i_ino == HFS_ROOT_CNID) 209 HFS_SB(sb)->root_dirs++; 210 inode->i_op = &hfs_dir_inode_operations; 211 inode->i_fop = &hfs_dir_operations; 212 inode->i_mode |= S_IRWXUGO; 213 inode->i_mode &= ~HFS_SB(inode->i_sb)->s_dir_umask; 214 } else if (S_ISREG(mode)) { 215 HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks; 216 HFS_SB(sb)->file_count++; 217 if (dir->i_ino == HFS_ROOT_CNID) 218 HFS_SB(sb)->root_files++; 219 inode->i_op = &hfs_file_inode_operations; 220 inode->i_fop = &hfs_file_operations; 221 inode->i_mapping->a_ops = &hfs_aops; 222 inode->i_mode |= S_IRUGO|S_IXUGO; 223 if (mode & S_IWUSR) 224 inode->i_mode |= S_IWUGO; 225 inode->i_mode &= ~HFS_SB(inode->i_sb)->s_file_umask; 226 HFS_I(inode)->phys_size = 0; 227 HFS_I(inode)->alloc_blocks = 0; 228 HFS_I(inode)->first_blocks = 0; 229 HFS_I(inode)->cached_start = 0; 230 HFS_I(inode)->cached_blocks = 0; 231 memset(HFS_I(inode)->first_extents, 0, sizeof(hfs_extent_rec)); 232 memset(HFS_I(inode)->cached_extents, 0, sizeof(hfs_extent_rec)); 233 } 234 insert_inode_hash(inode); 235 mark_inode_dirty(inode); 236 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); 237 hfs_mark_mdb_dirty(sb); 238 239 return inode; 240 } 241 242 void hfs_delete_inode(struct inode *inode) 243 { 244 struct super_block *sb = inode->i_sb; 245 246 hfs_dbg(INODE, "delete_inode: %lu\n", inode->i_ino); 247 if (S_ISDIR(inode->i_mode)) { 248 HFS_SB(sb)->folder_count--; 249 if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID)) 250 HFS_SB(sb)->root_dirs--; 251 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); 252 hfs_mark_mdb_dirty(sb); 253 return; 254 } 255 HFS_SB(sb)->file_count--; 256 if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID)) 257 HFS_SB(sb)->root_files--; 258 if (S_ISREG(inode->i_mode)) { 259 if (!inode->i_nlink) { 260 inode->i_size = 0; 261 hfs_file_truncate(inode); 262 } 263 } 264 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); 265 hfs_mark_mdb_dirty(sb); 266 } 267 268 void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext, 269 __be32 __log_size, __be32 phys_size, u32 clump_size) 270 { 271 struct super_block *sb = inode->i_sb; 272 u32 log_size = be32_to_cpu(__log_size); 273 u16 count; 274 int i; 275 276 memcpy(HFS_I(inode)->first_extents, ext, sizeof(hfs_extent_rec)); 277 for (count = 0, i = 0; i < 3; i++) 278 count += be16_to_cpu(ext[i].count); 279 HFS_I(inode)->first_blocks = count; 280 281 inode->i_size = HFS_I(inode)->phys_size = log_size; 282 HFS_I(inode)->fs_blocks = (log_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 283 inode_set_bytes(inode, HFS_I(inode)->fs_blocks << sb->s_blocksize_bits); 284 HFS_I(inode)->alloc_blocks = be32_to_cpu(phys_size) / 285 HFS_SB(sb)->alloc_blksz; 286 HFS_I(inode)->clump_blocks = clump_size / HFS_SB(sb)->alloc_blksz; 287 if (!HFS_I(inode)->clump_blocks) 288 HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks; 289 } 290 291 struct hfs_iget_data { 292 struct hfs_cat_key *key; 293 hfs_cat_rec *rec; 294 }; 295 296 static int hfs_test_inode(struct inode *inode, void *data) 297 { 298 struct hfs_iget_data *idata = data; 299 hfs_cat_rec *rec; 300 301 rec = idata->rec; 302 switch (rec->type) { 303 case HFS_CDR_DIR: 304 return inode->i_ino == be32_to_cpu(rec->dir.DirID); 305 case HFS_CDR_FIL: 306 return inode->i_ino == be32_to_cpu(rec->file.FlNum); 307 default: 308 BUG(); 309 return 1; 310 } 311 } 312 313 /* 314 * hfs_read_inode 315 */ 316 static int hfs_read_inode(struct inode *inode, void *data) 317 { 318 struct hfs_iget_data *idata = data; 319 struct hfs_sb_info *hsb = HFS_SB(inode->i_sb); 320 hfs_cat_rec *rec; 321 322 HFS_I(inode)->flags = 0; 323 HFS_I(inode)->rsrc_inode = NULL; 324 mutex_init(&HFS_I(inode)->extents_lock); 325 INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list); 326 spin_lock_init(&HFS_I(inode)->open_dir_lock); 327 328 /* Initialize the inode */ 329 inode->i_uid = hsb->s_uid; 330 inode->i_gid = hsb->s_gid; 331 set_nlink(inode, 1); 332 333 if (idata->key) 334 HFS_I(inode)->cat_key = *idata->key; 335 else 336 HFS_I(inode)->flags |= HFS_FLG_RSRC; 337 HFS_I(inode)->tz_secondswest = sys_tz.tz_minuteswest * 60; 338 339 rec = idata->rec; 340 switch (rec->type) { 341 case HFS_CDR_FIL: 342 if (!HFS_IS_RSRC(inode)) { 343 hfs_inode_read_fork(inode, rec->file.ExtRec, rec->file.LgLen, 344 rec->file.PyLen, be16_to_cpu(rec->file.ClpSize)); 345 } else { 346 hfs_inode_read_fork(inode, rec->file.RExtRec, rec->file.RLgLen, 347 rec->file.RPyLen, be16_to_cpu(rec->file.ClpSize)); 348 } 349 350 inode->i_ino = be32_to_cpu(rec->file.FlNum); 351 inode->i_mode = S_IRUGO | S_IXUGO; 352 if (!(rec->file.Flags & HFS_FIL_LOCK)) 353 inode->i_mode |= S_IWUGO; 354 inode->i_mode &= ~hsb->s_file_umask; 355 inode->i_mode |= S_IFREG; 356 inode->i_ctime = inode->i_atime = inode->i_mtime = 357 hfs_m_to_utime(rec->file.MdDat); 358 inode->i_op = &hfs_file_inode_operations; 359 inode->i_fop = &hfs_file_operations; 360 inode->i_mapping->a_ops = &hfs_aops; 361 break; 362 case HFS_CDR_DIR: 363 inode->i_ino = be32_to_cpu(rec->dir.DirID); 364 inode->i_size = be16_to_cpu(rec->dir.Val) + 2; 365 HFS_I(inode)->fs_blocks = 0; 366 inode->i_mode = S_IFDIR | (S_IRWXUGO & ~hsb->s_dir_umask); 367 inode->i_ctime = inode->i_atime = inode->i_mtime = 368 hfs_m_to_utime(rec->dir.MdDat); 369 inode->i_op = &hfs_dir_inode_operations; 370 inode->i_fop = &hfs_dir_operations; 371 break; 372 default: 373 make_bad_inode(inode); 374 } 375 return 0; 376 } 377 378 /* 379 * __hfs_iget() 380 * 381 * Given the MDB for a HFS filesystem, a 'key' and an 'entry' in 382 * the catalog B-tree and the 'type' of the desired file return the 383 * inode for that file/directory or NULL. Note that 'type' indicates 384 * whether we want the actual file or directory, or the corresponding 385 * metadata (AppleDouble header file or CAP metadata file). 386 */ 387 struct inode *hfs_iget(struct super_block *sb, struct hfs_cat_key *key, hfs_cat_rec *rec) 388 { 389 struct hfs_iget_data data = { key, rec }; 390 struct inode *inode; 391 u32 cnid; 392 393 switch (rec->type) { 394 case HFS_CDR_DIR: 395 cnid = be32_to_cpu(rec->dir.DirID); 396 break; 397 case HFS_CDR_FIL: 398 cnid = be32_to_cpu(rec->file.FlNum); 399 break; 400 default: 401 return NULL; 402 } 403 inode = iget5_locked(sb, cnid, hfs_test_inode, hfs_read_inode, &data); 404 if (inode && (inode->i_state & I_NEW)) 405 unlock_new_inode(inode); 406 return inode; 407 } 408 409 void hfs_inode_write_fork(struct inode *inode, struct hfs_extent *ext, 410 __be32 *log_size, __be32 *phys_size) 411 { 412 memcpy(ext, HFS_I(inode)->first_extents, sizeof(hfs_extent_rec)); 413 414 if (log_size) 415 *log_size = cpu_to_be32(inode->i_size); 416 if (phys_size) 417 *phys_size = cpu_to_be32(HFS_I(inode)->alloc_blocks * 418 HFS_SB(inode->i_sb)->alloc_blksz); 419 } 420 421 int hfs_write_inode(struct inode *inode, struct writeback_control *wbc) 422 { 423 struct inode *main_inode = inode; 424 struct hfs_find_data fd; 425 hfs_cat_rec rec; 426 int res; 427 428 hfs_dbg(INODE, "hfs_write_inode: %lu\n", inode->i_ino); 429 res = hfs_ext_write_extent(inode); 430 if (res) 431 return res; 432 433 if (inode->i_ino < HFS_FIRSTUSER_CNID) { 434 switch (inode->i_ino) { 435 case HFS_ROOT_CNID: 436 break; 437 case HFS_EXT_CNID: 438 hfs_btree_write(HFS_SB(inode->i_sb)->ext_tree); 439 return 0; 440 case HFS_CAT_CNID: 441 hfs_btree_write(HFS_SB(inode->i_sb)->cat_tree); 442 return 0; 443 default: 444 BUG(); 445 return -EIO; 446 } 447 } 448 449 if (HFS_IS_RSRC(inode)) 450 main_inode = HFS_I(inode)->rsrc_inode; 451 452 if (!main_inode->i_nlink) 453 return 0; 454 455 if (hfs_find_init(HFS_SB(main_inode->i_sb)->cat_tree, &fd)) 456 /* panic? */ 457 return -EIO; 458 459 fd.search_key->cat = HFS_I(main_inode)->cat_key; 460 if (hfs_brec_find(&fd)) 461 /* panic? */ 462 goto out; 463 464 if (S_ISDIR(main_inode->i_mode)) { 465 if (fd.entrylength < sizeof(struct hfs_cat_dir)) 466 /* panic? */; 467 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, 468 sizeof(struct hfs_cat_dir)); 469 if (rec.type != HFS_CDR_DIR || 470 be32_to_cpu(rec.dir.DirID) != inode->i_ino) { 471 } 472 473 rec.dir.MdDat = hfs_u_to_mtime(inode->i_mtime); 474 rec.dir.Val = cpu_to_be16(inode->i_size - 2); 475 476 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, 477 sizeof(struct hfs_cat_dir)); 478 } else if (HFS_IS_RSRC(inode)) { 479 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, 480 sizeof(struct hfs_cat_file)); 481 hfs_inode_write_fork(inode, rec.file.RExtRec, 482 &rec.file.RLgLen, &rec.file.RPyLen); 483 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, 484 sizeof(struct hfs_cat_file)); 485 } else { 486 if (fd.entrylength < sizeof(struct hfs_cat_file)) 487 /* panic? */; 488 hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, 489 sizeof(struct hfs_cat_file)); 490 if (rec.type != HFS_CDR_FIL || 491 be32_to_cpu(rec.file.FlNum) != inode->i_ino) { 492 } 493 494 if (inode->i_mode & S_IWUSR) 495 rec.file.Flags &= ~HFS_FIL_LOCK; 496 else 497 rec.file.Flags |= HFS_FIL_LOCK; 498 hfs_inode_write_fork(inode, rec.file.ExtRec, &rec.file.LgLen, &rec.file.PyLen); 499 rec.file.MdDat = hfs_u_to_mtime(inode->i_mtime); 500 501 hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, 502 sizeof(struct hfs_cat_file)); 503 } 504 out: 505 hfs_find_exit(&fd); 506 return 0; 507 } 508 509 static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry, 510 unsigned int flags) 511 { 512 struct inode *inode = NULL; 513 hfs_cat_rec rec; 514 struct hfs_find_data fd; 515 int res; 516 517 if (HFS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc")) 518 goto out; 519 520 inode = HFS_I(dir)->rsrc_inode; 521 if (inode) 522 goto out; 523 524 inode = new_inode(dir->i_sb); 525 if (!inode) 526 return ERR_PTR(-ENOMEM); 527 528 res = hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd); 529 if (res) { 530 iput(inode); 531 return ERR_PTR(res); 532 } 533 fd.search_key->cat = HFS_I(dir)->cat_key; 534 res = hfs_brec_read(&fd, &rec, sizeof(rec)); 535 if (!res) { 536 struct hfs_iget_data idata = { NULL, &rec }; 537 hfs_read_inode(inode, &idata); 538 } 539 hfs_find_exit(&fd); 540 if (res) { 541 iput(inode); 542 return ERR_PTR(res); 543 } 544 HFS_I(inode)->rsrc_inode = dir; 545 HFS_I(dir)->rsrc_inode = inode; 546 igrab(dir); 547 inode_fake_hash(inode); 548 mark_inode_dirty(inode); 549 dont_mount(dentry); 550 out: 551 return d_splice_alias(inode, dentry); 552 } 553 554 void hfs_evict_inode(struct inode *inode) 555 { 556 truncate_inode_pages_final(&inode->i_data); 557 clear_inode(inode); 558 if (HFS_IS_RSRC(inode) && HFS_I(inode)->rsrc_inode) { 559 HFS_I(HFS_I(inode)->rsrc_inode)->rsrc_inode = NULL; 560 iput(HFS_I(inode)->rsrc_inode); 561 } 562 } 563 564 static int hfs_file_open(struct inode *inode, struct file *file) 565 { 566 if (HFS_IS_RSRC(inode)) 567 inode = HFS_I(inode)->rsrc_inode; 568 atomic_inc(&HFS_I(inode)->opencnt); 569 return 0; 570 } 571 572 static int hfs_file_release(struct inode *inode, struct file *file) 573 { 574 //struct super_block *sb = inode->i_sb; 575 576 if (HFS_IS_RSRC(inode)) 577 inode = HFS_I(inode)->rsrc_inode; 578 if (atomic_dec_and_test(&HFS_I(inode)->opencnt)) { 579 inode_lock(inode); 580 hfs_file_truncate(inode); 581 //if (inode->i_flags & S_DEAD) { 582 // hfs_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL); 583 // hfs_delete_inode(inode); 584 //} 585 inode_unlock(inode); 586 } 587 return 0; 588 } 589 590 /* 591 * hfs_notify_change() 592 * 593 * Based very closely on fs/msdos/inode.c by Werner Almesberger 594 * 595 * This is the notify_change() field in the super_operations structure 596 * for HFS file systems. The purpose is to take that changes made to 597 * an inode and apply then in a filesystem-dependent manner. In this 598 * case the process has a few of tasks to do: 599 * 1) prevent changes to the i_uid and i_gid fields. 600 * 2) map file permissions to the closest allowable permissions 601 * 3) Since multiple Linux files can share the same on-disk inode under 602 * HFS (for instance the data and resource forks of a file) a change 603 * to permissions must be applied to all other in-core inodes which 604 * correspond to the same HFS file. 605 */ 606 607 int hfs_inode_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, 608 struct iattr *attr) 609 { 610 struct inode *inode = d_inode(dentry); 611 struct hfs_sb_info *hsb = HFS_SB(inode->i_sb); 612 int error; 613 614 error = setattr_prepare(&init_user_ns, dentry, 615 attr); /* basic permission checks */ 616 if (error) 617 return error; 618 619 /* no uig/gid changes and limit which mode bits can be set */ 620 if (((attr->ia_valid & ATTR_UID) && 621 (!uid_eq(attr->ia_uid, hsb->s_uid))) || 622 ((attr->ia_valid & ATTR_GID) && 623 (!gid_eq(attr->ia_gid, hsb->s_gid))) || 624 ((attr->ia_valid & ATTR_MODE) && 625 ((S_ISDIR(inode->i_mode) && 626 (attr->ia_mode != inode->i_mode)) || 627 (attr->ia_mode & ~HFS_VALID_MODE_BITS)))) { 628 return hsb->s_quiet ? 0 : error; 629 } 630 631 if (attr->ia_valid & ATTR_MODE) { 632 /* Only the 'w' bits can ever change and only all together. */ 633 if (attr->ia_mode & S_IWUSR) 634 attr->ia_mode = inode->i_mode | S_IWUGO; 635 else 636 attr->ia_mode = inode->i_mode & ~S_IWUGO; 637 attr->ia_mode &= S_ISDIR(inode->i_mode) ? ~hsb->s_dir_umask: ~hsb->s_file_umask; 638 } 639 640 if ((attr->ia_valid & ATTR_SIZE) && 641 attr->ia_size != i_size_read(inode)) { 642 inode_dio_wait(inode); 643 644 error = inode_newsize_ok(inode, attr->ia_size); 645 if (error) 646 return error; 647 648 truncate_setsize(inode, attr->ia_size); 649 hfs_file_truncate(inode); 650 inode->i_atime = inode->i_mtime = inode->i_ctime = 651 current_time(inode); 652 } 653 654 setattr_copy(&init_user_ns, inode, attr); 655 mark_inode_dirty(inode); 656 return 0; 657 } 658 659 static int hfs_file_fsync(struct file *filp, loff_t start, loff_t end, 660 int datasync) 661 { 662 struct inode *inode = filp->f_mapping->host; 663 struct super_block * sb; 664 int ret, err; 665 666 ret = file_write_and_wait_range(filp, start, end); 667 if (ret) 668 return ret; 669 inode_lock(inode); 670 671 /* sync the inode to buffers */ 672 ret = write_inode_now(inode, 0); 673 674 /* sync the superblock to buffers */ 675 sb = inode->i_sb; 676 flush_delayed_work(&HFS_SB(sb)->mdb_work); 677 /* .. finally sync the buffers to disk */ 678 err = sync_blockdev(sb->s_bdev); 679 if (!ret) 680 ret = err; 681 inode_unlock(inode); 682 return ret; 683 } 684 685 static const struct file_operations hfs_file_operations = { 686 .llseek = generic_file_llseek, 687 .read_iter = generic_file_read_iter, 688 .write_iter = generic_file_write_iter, 689 .mmap = generic_file_mmap, 690 .splice_read = generic_file_splice_read, 691 .fsync = hfs_file_fsync, 692 .open = hfs_file_open, 693 .release = hfs_file_release, 694 }; 695 696 static const struct inode_operations hfs_file_inode_operations = { 697 .lookup = hfs_file_lookup, 698 .setattr = hfs_inode_setattr, 699 .listxattr = generic_listxattr, 700 }; 701