1/* 2 * linux/fs/hfsplus/inode.c 3 * 4 * Copyright (C) 2001 5 * Brad Boyer (flar@allandria.com) 6 * (C) 2003 Ardis Technologies <roman@ardistech.com> 7 * 8 * Inode handling routines 9 */ 10 11#include <linux/mm.h> 12#include <linux/fs.h> 13#include <linux/pagemap.h> 14#include <linux/mpage.h> 15#include <linux/sched.h> 16 17#include "hfsplus_fs.h" 18#include "hfsplus_raw.h" 19 20static int hfsplus_readpage(struct file *file, struct page *page) 21{ 22 return block_read_full_page(page, hfsplus_get_block); 23} 24 25static int hfsplus_writepage(struct page *page, struct writeback_control *wbc) 26{ 27 return block_write_full_page(page, hfsplus_get_block, wbc); 28} 29 30static int hfsplus_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) 31{ 32 return cont_prepare_write(page, from, to, hfsplus_get_block, 33 &HFSPLUS_I(page->mapping->host).phys_size); 34} 35 36static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block) 37{ 38 return generic_block_bmap(mapping, block, hfsplus_get_block); 39} 40 41static int hfsplus_releasepage(struct page *page, gfp_t mask) 42{ 43 struct inode *inode = page->mapping->host; 44 struct super_block *sb = inode->i_sb; 45 struct hfs_btree *tree; 46 struct hfs_bnode *node; 47 u32 nidx; 48 int i, res = 1; 49 50 switch (inode->i_ino) { 51 case HFSPLUS_EXT_CNID: 52 tree = HFSPLUS_SB(sb).ext_tree; 53 break; 54 case HFSPLUS_CAT_CNID: 55 tree = HFSPLUS_SB(sb).cat_tree; 56 break; 57 case HFSPLUS_ATTR_CNID: 58 tree = HFSPLUS_SB(sb).attr_tree; 59 break; 60 default: 61 BUG(); 62 return 0; 63 } 64 if (tree->node_size >= PAGE_CACHE_SIZE) { 65 nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT); 66 spin_lock(&tree->hash_lock); 67 node = hfs_bnode_findhash(tree, nidx); 68 if (!node) 69 ; 70 else if (atomic_read(&node->refcnt)) 71 res = 0; 72 if (res && node) { 73 hfs_bnode_unhash(node); 74 hfs_bnode_free(node); 75 } 76 spin_unlock(&tree->hash_lock); 77 } else { 78 nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift); 79 i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift); 80 spin_lock(&tree->hash_lock); 81 do { 82 node = hfs_bnode_findhash(tree, nidx++); 83 if (!node) 84 continue; 85 if (atomic_read(&node->refcnt)) { 86 res = 0; 87 break; 88 } 89 hfs_bnode_unhash(node); 90 hfs_bnode_free(node); 91 } while (--i && nidx < tree->node_count); 92 spin_unlock(&tree->hash_lock); 93 } 94 return res ? try_to_free_buffers(page) : 0; 95} 96 97int hfsplus_commit_write_fn(hfsplus_handle_t *hfsplus_handle, struct buffer_head *bh) 98{ 99 if (!buffer_mapped(bh) || buffer_hfsplus_jbd_freed(bh)) 100 return 0; 101 set_buffer_uptodate(bh); 102 103 return hfsplus_journal_dirty_metadata(__FUNCTION__, bh, hfsplus_handle); 104} 105 106static int hfsplus_jbd_set_page_dirty(struct page *page) 107{ 108 SetPageChecked(page); 109 return __set_page_dirty_nobuffers(page); 110} 111 112int hfsplus_walk_page_buffers(hfsplus_handle_t *hfsplus_handle, 113 struct buffer_head *head, 114 unsigned from, 115 unsigned to, 116 int *partial, 117 int (*fn)(hfsplus_handle_t *hfsplus_handle, 118 struct buffer_head *bh)) 119{ 120 struct buffer_head *bh; 121 unsigned block_start, block_end; 122 unsigned blocksize = head->b_size; 123 int err, ret = 0; 124 struct buffer_head *next; 125 126 for ( bh = head, block_start = 0; 127 ret == 0 && (bh != head || !block_start); 128 block_start = block_end, bh = next) 129 { 130 next = bh->b_this_page; 131 block_end = block_start + blocksize; 132 if (block_end <= from || block_start >= to) { 133 if (partial && !buffer_uptodate(bh)) 134 *partial = 1; 135 continue; 136 } 137 err = (*fn)(hfsplus_handle, bh); 138 if (!ret) 139 ret = err; 140 } 141 return ret; 142} 143 144int hfsplus_do_journal_get_write_access(hfsplus_handle_t *hfsplus_handle, struct buffer_head *bh) 145{ 146 if (!buffer_mapped(bh) || buffer_hfsplus_jbd_freed(bh)) 147 return 0; 148 return hfsplus_journal_get_write_access(__FUNCTION__, hfsplus_handle, bh); 149} 150 151static int hfsplus_journalled_writepage(struct page *page, struct writeback_control *wbc) 152{ 153 struct inode *inode = page->mapping->host; 154 struct super_block *sb; 155 hfsplus_handle_t hfsplus_handle; 156 hfsplus_jbd_t *journal; 157 int ret = 0; 158 int err; 159 160 sb = inode->i_sb; 161 162 if (hfsplus_jbd_current_handle()) { 163 dprint(DBG_JCOMMIT, "HFS+-fs: It is already in a handle\n"); 164 goto no_write; 165 } 166 167 journal = HFSPLUS_SB(sb).jnl.s_journal; 168 if (is_hfsplus_jbd_aborted(journal)) { 169 printk("HFS+-fs: Detected aborted journal\n"); 170 goto no_write; 171 } 172 173 if ((ret = hfsplus_journal_start(__FUNCTION__, sb, &hfsplus_handle))) 174 goto no_write; 175 176 /* Taken from ext3 */ 177 if (!page_has_buffers(page) || PageChecked(page)) { 178 /* 179 * It's mmapped pagecache. Add buffers and journal it. There 180 * doesn't seem much point in redirtying the page here. 181 */ 182 ClearPageChecked(page); 183 ret = block_prepare_write(page, 0, PAGE_CACHE_SIZE, hfsplus_get_block); 184 if (ret != 0) { 185 hfsplus_journal_stop(&hfsplus_handle); 186 goto out_unlock; 187 } 188 ret = hfsplus_walk_page_buffers(&hfsplus_handle, page_buffers(page), 0, 189 PAGE_CACHE_SIZE, NULL, hfsplus_do_journal_get_write_access); 190 191 err = hfsplus_walk_page_buffers(&hfsplus_handle, page_buffers(page), 0, 192 PAGE_CACHE_SIZE, NULL, hfsplus_commit_write_fn); 193 if (ret == 0) 194 ret = err; 195 unlock_page(page); 196 } else { 197 /* 198 * It may be a page full of checkpoint-mode buffers. We don't 199 * really know unless we go poke around in the buffer_heads. 200 * But block_write_full_page will do the right thing. 201 */ 202 ret = block_write_full_page(page, hfsplus_get_block, wbc); 203 } 204 err = hfsplus_journal_stop(&hfsplus_handle); 205 if (!ret) 206 ret = err; 207 208out: 209 return ret; 210 211no_write: 212 redirty_page_for_writepage(wbc, page); 213out_unlock: 214 unlock_page(page); 215 goto out; 216} 217 218static int hfsplus_journalled_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) 219{ 220 struct inode *inode = page->mapping->host; 221 hfsplus_handle_t hfsplus_handle; 222 int ret; 223 224 if ((ret = hfsplus_journal_start(__FUNCTION__, inode->i_sb, &hfsplus_handle))) 225 goto out; 226 227 ret = block_prepare_write(page, from, to, hfsplus_get_block); 228 if (ret) 229 hfsplus_journal_stop(&hfsplus_handle); 230 231out: 232 return ret; 233} 234 235static int hfsplus_journalled_commit_write(struct file *file, struct page *page, unsigned from, unsigned to) 236{ 237 hfsplus_handle_t *hfsplus_handle; 238 struct inode *inode = page->mapping->host; 239 int ret = 0, ret2; 240 int partial = 0; 241 loff_t pos; 242 243 hfsplus_handle = hfsplus_jbd_current_handle(); 244 /* 245 * Here we duplicate the generic_commit_write() functionality 246 */ 247 pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to; 248 249 ret = hfsplus_walk_page_buffers(hfsplus_handle, page_buffers(page), from, to, &partial, hfsplus_commit_write_fn); 250 if (!partial) 251 SetPageUptodate(page); 252 if (pos > inode->i_size) { 253 i_size_write(inode, pos); 254 ret2 = hfsplus_journalled_mark_inode_dirty(__FUNCTION__, hfsplus_handle, inode); 255 if (!ret) 256 ret = ret2; 257 } 258 259 ret2 = hfsplus_journal_stop(hfsplus_handle); 260 if (!ret) 261 ret = ret2; 262 return ret; 263} 264 265static int hfsplus_get_blocks(struct inode *inode, sector_t iblock, unsigned long max_blocks, 266 struct buffer_head *bh_result, int create) 267{ 268 int ret; 269 270 ret = hfsplus_get_block(inode, iblock, bh_result, create); 271 if (!ret) 272 bh_result->b_size = (1 << inode->i_blkbits); 273 return ret; 274} 275 276static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb, 277 const struct iovec *iov, loff_t offset, unsigned long nr_segs) 278{ 279 struct file *file = iocb->ki_filp; 280 struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host; 281 282 return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov, 283 offset, nr_segs, hfsplus_get_block, NULL); 284} 285 286static int hfsplus_writepages(struct address_space *mapping, 287 struct writeback_control *wbc) 288{ 289 struct inode * const inode = mapping->host; 290 int ret; 291 u32 block_num = be32_to_cpu(HFSPLUS_I(inode).first_extents[0].start_block); 292 293 if (block_num == 1) 294 return mpage_writepages(mapping, wbc, NULL); 295 else 296 return mpage_writepages(mapping, wbc, hfsplus_get_block); 297 298 return ret; 299} 300 301#if 0 302static int hfsplus_journalled_writepages(struct address_space *mapping, 303 struct writeback_control *wbc) 304{ 305 struct inode * const inode = mapping->host; 306 u32 block_num = be32_to_cpu(HFSPLUS_I(inode).first_extents[0].start_block); 307 int ret; 308 hfsplus_handle_t hfsplus_handle; 309 310 if (hfsplus_journal_start(__FUNCTION__, inode->i_sb, &hfsplus_handle)) 311 return 1; /* TODO: Need to check return value */ 312 313 if (block_num == 1) 314 ret = mpage_writepages(mapping, wbc, NULL); 315 else 316 ret = mpage_writepages(mapping, wbc, hfsplus_get_block); 317 318 hfsplus_journal_stop(&hfsplus_handle); 319 return ret; 320} 321#endif 322 323struct address_space_operations hfsplus_journalled_btree_aops = { 324 .readpage = hfsplus_readpage, 325 .writepage = hfsplus_journalled_writepage, 326 .sync_page = block_sync_page, 327 .prepare_write = hfsplus_journalled_prepare_write, 328 .commit_write = hfsplus_journalled_commit_write, 329 .set_page_dirty = hfsplus_jbd_set_page_dirty, 330 .bmap = hfsplus_bmap, 331 .releasepage = hfsplus_releasepage, 332}; 333 334struct address_space_operations hfsplus_journalled_aops = { 335 .readpage = hfsplus_readpage, 336 .writepage = hfsplus_journalled_writepage, 337 .sync_page = block_sync_page, 338 .prepare_write = hfsplus_journalled_prepare_write, 339 .commit_write = hfsplus_journalled_commit_write, 340 .set_page_dirty = hfsplus_jbd_set_page_dirty, 341 .bmap = hfsplus_bmap, 342 .direct_IO = hfsplus_direct_IO, 343 .writepages = hfsplus_writepages, 344}; 345 346const struct address_space_operations hfsplus_btree_aops = { 347 .readpage = hfsplus_readpage, 348 .writepage = hfsplus_writepage, 349 .sync_page = block_sync_page, 350 .prepare_write = hfsplus_prepare_write, 351 .commit_write = generic_commit_write, 352 .bmap = hfsplus_bmap, 353 .releasepage = hfsplus_releasepage, 354}; 355 356const struct address_space_operations hfsplus_aops = { 357 .readpage = hfsplus_readpage, 358 .writepage = hfsplus_writepage, 359 .sync_page = block_sync_page, 360 .prepare_write = hfsplus_prepare_write, 361 .commit_write = generic_commit_write, 362 .bmap = hfsplus_bmap, 363 .direct_IO = hfsplus_direct_IO, 364 .writepages = hfsplus_writepages, 365}; 366 367static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dentry, 368 struct nameidata *nd) 369{ 370 struct hfs_find_data fd; 371 struct super_block *sb = dir->i_sb; 372 struct inode *inode = NULL; 373 hfsplus_handle_t hfsplus_handle; 374 int err; 375 376 if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc")) 377 goto out; 378 379 inode = HFSPLUS_I(dir).rsrc_inode; 380 if (inode) 381 goto out; 382 383 if (hfsplus_journal_start(__FUNCTION__, sb, &hfsplus_handle)) 384 return NULL; 385 386 inode = new_inode(sb); 387 if (!inode) { 388 hfsplus_journal_stop(&hfsplus_handle); 389 return ERR_PTR(-ENOMEM); 390 } 391 392 inode->i_ino = dir->i_ino; 393 INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list); 394 init_MUTEX(&HFSPLUS_I(inode).extents_lock); 395 HFSPLUS_I(inode).flags = HFSPLUS_FLG_RSRC; 396 397 hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); 398 err = hfsplus_find_cat(&hfsplus_handle, sb, dir->i_ino, &fd); 399 if (!err) 400 err = hfsplus_cat_read_inode(inode, &fd); 401 hfs_find_exit(&hfsplus_handle, &fd); 402 if (err) { 403 iput(inode); 404 hfsplus_journal_stop(&hfsplus_handle); 405 return ERR_PTR(err); 406 } 407 HFSPLUS_I(inode).rsrc_inode = dir; 408 HFSPLUS_I(dir).rsrc_inode = inode; 409 igrab(dir); 410 hlist_add_head(&inode->i_hash, &HFSPLUS_SB(sb).rsrc_inodes); 411 hfsplus_journalled_mark_inode_dirty(__FUNCTION__, &hfsplus_handle, inode); 412 hfsplus_journal_stop(&hfsplus_handle); 413out: 414 d_add(dentry, inode); 415 return NULL; 416} 417 418static void hfsplus_get_perms(struct inode *inode, struct hfsplus_perm *perms, int dir) 419{ 420 struct super_block *sb = inode->i_sb; 421 u16 mode; 422 423 mode = be16_to_cpu(perms->mode); 424 425 inode->i_uid = be32_to_cpu(perms->owner); 426 if (!inode->i_uid && !mode) 427 inode->i_uid = HFSPLUS_SB(sb).uid; 428 429 inode->i_gid = be32_to_cpu(perms->group); 430 if (!inode->i_gid && !mode) 431 inode->i_gid = HFSPLUS_SB(sb).gid; 432 433 if (dir) { 434 mode = mode ? (mode & S_IALLUGO) : 435 (S_IRWXUGO & ~(HFSPLUS_SB(sb).umask)); 436 mode |= S_IFDIR; 437 } else if (!mode) 438 mode = S_IFREG | ((S_IRUGO|S_IWUGO) & 439 ~(HFSPLUS_SB(sb).umask)); 440 inode->i_mode = mode; 441 442 HFSPLUS_I(inode).rootflags = perms->rootflags; 443 HFSPLUS_I(inode).userflags = perms->userflags; 444 if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE) 445 inode->i_flags |= S_IMMUTABLE; 446 else 447 inode->i_flags &= ~S_IMMUTABLE; 448 if (perms->rootflags & HFSPLUS_FLG_APPEND) 449 inode->i_flags |= S_APPEND; 450 else 451 inode->i_flags &= ~S_APPEND; 452} 453 454static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms) 455{ 456 if (inode->i_flags & S_IMMUTABLE) 457 perms->rootflags |= HFSPLUS_FLG_IMMUTABLE; 458 else 459 perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE; 460 if (inode->i_flags & S_APPEND) 461 perms->rootflags |= HFSPLUS_FLG_APPEND; 462 else 463 perms->rootflags &= ~HFSPLUS_FLG_APPEND; 464 perms->userflags = HFSPLUS_I(inode).userflags; 465 perms->mode = cpu_to_be16(inode->i_mode); 466 perms->owner = cpu_to_be32(inode->i_uid); 467 perms->group = cpu_to_be32(inode->i_gid); 468 perms->dev = cpu_to_be32(HFSPLUS_I(inode).dev); 469} 470 471static int hfsplus_permission(struct inode *inode, int mask, struct nameidata *nd) 472{ 473 /* MAY_EXEC is also used for lookup, if no x bit is set allow lookup, 474 * open_exec has the same test, so it's still not executable, if a x bit 475 * is set fall back to standard permission check. 476 */ 477 if (S_ISREG(inode->i_mode) && mask & MAY_EXEC && !(inode->i_mode & 0111)) 478 return 0; 479 return generic_permission(inode, mask, NULL); 480} 481 482 483static int hfsplus_file_open(struct inode *inode, struct file *file) 484{ 485 if (HFSPLUS_IS_RSRC(inode)) 486 inode = HFSPLUS_I(inode).rsrc_inode; 487 if (atomic_read(&file->f_count) != 1) 488 return 0; 489 atomic_inc(&HFSPLUS_I(inode).opencnt); 490 return 0; 491} 492 493static int hfsplus_file_release(struct inode *inode, struct file *file) 494{ 495 struct super_block *sb = inode->i_sb; 496 hfsplus_handle_t hfsplus_handle; 497 498 if (HFSPLUS_IS_RSRC(inode)) 499 inode = HFSPLUS_I(inode).rsrc_inode; 500 if (atomic_read(&file->f_count) != 0) 501 return 0; 502 if (atomic_dec_and_test(&HFSPLUS_I(inode).opencnt)) { 503 int ret; 504 mutex_lock(&inode->i_mutex); 505 hfsplus_file_truncate(inode); 506 if (inode->i_flags & S_DEAD) { 507 if ((ret = hfsplus_journal_start(__FUNCTION__, sb, &hfsplus_handle))) { 508 mutex_unlock(&inode->i_mutex); 509 return ret; 510 } 511 hfsplus_delete_cat(&hfsplus_handle, inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL); 512 hfsplus_delete_inode(&hfsplus_handle, inode); 513 hfsplus_journal_stop(&hfsplus_handle); 514 } 515 mutex_unlock(&inode->i_mutex); 516 } 517 return 0; 518} 519 520extern const struct inode_operations hfsplus_dir_inode_operations; 521extern struct file_operations hfsplus_dir_operations; 522 523static const struct inode_operations hfsplus_file_inode_operations = { 524 .lookup = hfsplus_file_lookup, 525 .truncate = hfsplus_file_truncate, 526 .permission = hfsplus_permission, 527 .setxattr = hfsplus_setxattr, 528 .getxattr = hfsplus_getxattr, 529 .listxattr = hfsplus_listxattr, 530}; 531 532static const struct file_operations hfsplus_file_operations = { 533 .llseek = generic_file_llseek, 534 .read = do_sync_read, 535 .aio_read = generic_file_aio_read, 536 .write = do_sync_write, 537 .aio_write = generic_file_aio_write, 538 .mmap = generic_file_mmap, 539 .sendfile = generic_file_sendfile, 540 .fsync = file_fsync, 541 .open = hfsplus_file_open, 542 .release = hfsplus_file_release, 543 .ioctl = hfsplus_ioctl, 544}; 545 546struct inode *hfsplus_new_inode(hfsplus_handle_t *hfsplus_handle, struct super_block *sb, int mode) 547{ 548 struct inode *inode = new_inode(sb); 549 if (!inode) 550 return NULL; 551 552 //{ 553 //void hfsplus_inode_check(struct super_block *sb); 554 //atomic_inc(&HFSPLUS_SB(sb).inode_cnt); 555 //hfsplus_inode_check(sb); 556 //} 557 inode->i_ino = HFSPLUS_SB(sb).next_cnid++; 558 inode->i_mode = mode; 559 inode->i_uid = current->fsuid; 560 inode->i_gid = current->fsgid; 561 inode->i_nlink = 1; 562 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC; 563 INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list); 564 init_MUTEX(&HFSPLUS_I(inode).extents_lock); 565 atomic_set(&HFSPLUS_I(inode).opencnt, 0); 566 HFSPLUS_I(inode).flags = 0; 567 memset(HFSPLUS_I(inode).first_extents, 0, sizeof(hfsplus_extent_rec)); 568 memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec)); 569 HFSPLUS_I(inode).alloc_blocks = 0; 570 HFSPLUS_I(inode).first_blocks = 0; 571 HFSPLUS_I(inode).cached_start = 0; 572 HFSPLUS_I(inode).cached_blocks = 0; 573 HFSPLUS_I(inode).phys_size = 0; 574 HFSPLUS_I(inode).fs_blocks = 0; 575 HFSPLUS_I(inode).rsrc_inode = NULL; 576 if (S_ISDIR(inode->i_mode)) { 577 inode->i_size = 2; 578 HFSPLUS_SB(sb).folder_count++; 579 inode->i_op = &hfsplus_dir_inode_operations; 580 inode->i_fop = &hfsplus_dir_operations; 581 } else if (S_ISREG(inode->i_mode)) { 582 HFSPLUS_SB(sb).file_count++; 583 inode->i_op = &hfsplus_file_inode_operations; 584 inode->i_fop = &hfsplus_file_operations; 585 inode->i_mapping->a_ops = &hfsplus_aops; 586 HFSPLUS_I(inode).clump_blocks = HFSPLUS_SB(sb).data_clump_blocks; 587 } else if (S_ISLNK(inode->i_mode)) { 588 HFSPLUS_SB(sb).file_count++; 589 inode->i_op = &page_symlink_inode_operations; 590 inode->i_mapping->a_ops = &hfsplus_aops; 591 HFSPLUS_I(inode).clump_blocks = 1; 592 } else 593 HFSPLUS_SB(sb).file_count++; 594 insert_inode_hash(inode); 595 if (hfsplus_journalled_mark_inode_dirty(__FUNCTION__, hfsplus_handle, inode)) { 596 hfsplus_delete_inode(hfsplus_handle, inode); 597 return NULL; 598 } 599 sb->s_dirt = 1; 600 601 return inode; 602} 603 604void hfsplus_delete_inode(hfsplus_handle_t *hfsplus_handle, struct inode *inode) 605{ 606 struct super_block *sb = inode->i_sb; 607 608 if (S_ISDIR(inode->i_mode)) { 609 HFSPLUS_SB(sb).folder_count--; 610 sb->s_dirt = 1; 611 return; 612 } 613 HFSPLUS_SB(sb).file_count--; 614 if (S_ISREG(inode->i_mode)) { 615 if (!inode->i_nlink) { 616 inode->i_size = 0; 617 hfsplus_file_truncate(inode); 618 } 619 } else if (S_ISLNK(inode->i_mode)) { 620 inode->i_size = 0; 621 hfsplus_file_truncate(inode); 622 } 623 sb->s_dirt = 1; 624} 625 626void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork) 627{ 628 struct super_block *sb = inode->i_sb; 629 u32 count; 630 int i; 631 632 memcpy(&HFSPLUS_I(inode).first_extents, &fork->extents, 633 sizeof(hfsplus_extent_rec)); 634 for (count = 0, i = 0; i < 8; i++) 635 count += be32_to_cpu(fork->extents[i].block_count); 636 HFSPLUS_I(inode).first_blocks = count; 637 memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec)); 638 HFSPLUS_I(inode).cached_start = 0; 639 HFSPLUS_I(inode).cached_blocks = 0; 640 641 HFSPLUS_I(inode).alloc_blocks = be32_to_cpu(fork->total_blocks); 642 inode->i_size = HFSPLUS_I(inode).phys_size = be64_to_cpu(fork->total_size); 643 HFSPLUS_I(inode).fs_blocks = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 644 inode_set_bytes(inode, HFSPLUS_I(inode).fs_blocks << sb->s_blocksize_bits); 645 /* Foxconn added start pling 05/31/2010 */ 646 /* Set the i_blocks field properly */ 647 inode->i_blocks = inode->i_size/512; 648 if (inode->i_size % 512) 649 inode->i_blocks++; 650 /* Foxconn added end pling 05/31/2010 */ 651 HFSPLUS_I(inode).clump_blocks = be32_to_cpu(fork->clump_size) >> HFSPLUS_SB(sb).alloc_blksz_shift; 652 if (!HFSPLUS_I(inode).clump_blocks) 653 HFSPLUS_I(inode).clump_blocks = HFSPLUS_IS_RSRC(inode) ? HFSPLUS_SB(sb).rsrc_clump_blocks : 654 HFSPLUS_SB(sb).data_clump_blocks; 655} 656 657void hfsplus_inode_write_fork(struct inode *inode, struct hfsplus_fork_raw *fork) 658{ 659 memcpy(&fork->extents, &HFSPLUS_I(inode).first_extents, 660 sizeof(hfsplus_extent_rec)); 661 fork->total_size = cpu_to_be64(inode->i_size); 662 fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode).alloc_blocks); 663} 664 665int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd) 666{ 667 hfsplus_cat_entry entry; 668 int res = 0; 669 u16 type; 670 671 type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset); 672 673 HFSPLUS_I(inode).dev = 0; 674 if (type == HFSPLUS_FOLDER) { 675 struct hfsplus_cat_folder *folder = &entry.folder; 676 677 if (fd->entrylength < sizeof(struct hfsplus_cat_folder)) 678 /* panic? */; 679 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, 680 sizeof(struct hfsplus_cat_folder)); 681 hfsplus_get_perms(inode, &folder->permissions, 1); 682 inode->i_nlink = 1; 683 inode->i_size = 2 + be32_to_cpu(folder->valence); 684 inode->i_atime = hfsp_mt2ut(folder->access_date); 685 inode->i_mtime = hfsp_mt2ut(folder->content_mod_date); 686 inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date); 687 HFSPLUS_I(inode).create_date = folder->create_date; 688 HFSPLUS_I(inode).fs_blocks = 0; 689 inode->i_op = &hfsplus_dir_inode_operations; 690 inode->i_fop = &hfsplus_dir_operations; 691 } else if (type == HFSPLUS_FILE) { 692 struct hfsplus_cat_file *file = &entry.file; 693 694 if (fd->entrylength < sizeof(struct hfsplus_cat_file)) 695 /* panic? */; 696 hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, 697 sizeof(struct hfsplus_cat_file)); 698 699 hfsplus_inode_read_fork(inode, HFSPLUS_IS_DATA(inode) ? 700 &file->data_fork : &file->rsrc_fork); 701 hfsplus_get_perms(inode, &file->permissions, 0); 702 inode->i_nlink = 1; 703 if (S_ISREG(inode->i_mode)) { 704 if (file->permissions.dev) 705 inode->i_nlink = be32_to_cpu(file->permissions.dev); 706 inode->i_op = &hfsplus_file_inode_operations; 707 inode->i_fop = &hfsplus_file_operations; 708 inode->i_mapping->a_ops = &hfsplus_aops; 709 } else if (S_ISLNK(inode->i_mode)) { 710 inode->i_op = &page_symlink_inode_operations; 711 inode->i_mapping->a_ops = &hfsplus_aops; 712 } else { 713 init_special_inode(inode, inode->i_mode, 714 be32_to_cpu(file->permissions.dev)); 715 } 716 inode->i_atime = hfsp_mt2ut(file->access_date); 717 inode->i_mtime = hfsp_mt2ut(file->content_mod_date); 718 inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date); 719 HFSPLUS_I(inode).create_date = file->create_date; 720 } else { 721 printk(KERN_ERR "hfs: bad catalog entry used to create inode\n"); 722 res = -EIO; 723 } 724 return res; 725} 726 727int hfsplus_cat_write_inode(hfsplus_handle_t *hfsplus_handle, struct inode *inode) 728{ 729 struct inode *main_inode = inode; 730 struct hfs_find_data fd; 731 hfsplus_cat_entry entry; 732 733 if (HFSPLUS_IS_RSRC(inode)) 734 main_inode = HFSPLUS_I(inode).rsrc_inode; 735 736 if (!main_inode->i_nlink) 737 return 0; 738 739 if (hfsplus_handle->journaled != HFSPLUS_JOURNAL_PRESENT) { 740 if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb).cat_tree, &fd)) 741 /* panic? */ 742 return -EIO; 743 } else { 744 if (hfsplus_journalled_find_init(HFSPLUS_SB(main_inode->i_sb).cat_tree, &fd)) 745 /* panic? */ 746 return -EIO; 747 } 748 749 if (hfsplus_find_cat(hfsplus_handle, main_inode->i_sb, main_inode->i_ino, &fd)) 750 /* panic? */ 751 goto out; 752 753 if (S_ISDIR(main_inode->i_mode)) { 754 struct hfsplus_cat_folder *folder = &entry.folder; 755 756 if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) 757 /* panic? */; 758 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, 759 sizeof(struct hfsplus_cat_folder)); 760 /* simple node checks? */ 761 hfsplus_set_perms(inode, &folder->permissions); 762 folder->access_date = hfsp_ut2mt(inode->i_atime); 763 folder->content_mod_date = hfsp_ut2mt(inode->i_mtime); 764 folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime); 765 folder->valence = cpu_to_be32(inode->i_size - 2); 766 hfs_bnode_write(hfsplus_handle, fd.bnode, &entry, fd.entryoffset, 767 sizeof(struct hfsplus_cat_folder)); 768 } else if (HFSPLUS_IS_RSRC(inode)) { 769 struct hfsplus_cat_file *file = &entry.file; 770 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, 771 sizeof(struct hfsplus_cat_file)); 772 hfsplus_inode_write_fork(inode, &file->rsrc_fork); 773 hfs_bnode_write(hfsplus_handle, fd.bnode, &entry, fd.entryoffset, 774 sizeof(struct hfsplus_cat_file)); 775 } else { 776 struct hfsplus_cat_file *file = &entry.file; 777 778 if (fd.entrylength < sizeof(struct hfsplus_cat_file)) 779 /* panic? */; 780 hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, 781 sizeof(struct hfsplus_cat_file)); 782 hfsplus_inode_write_fork(inode, &file->data_fork); 783 if (S_ISREG(inode->i_mode)) 784 HFSPLUS_I(inode).dev = inode->i_nlink; 785 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 786 HFSPLUS_I(inode).dev = kdev_t_to_nr(inode->i_rdev); 787 hfsplus_set_perms(inode, &file->permissions); 788 if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE) 789 file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); 790 else 791 file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED); 792 file->access_date = hfsp_ut2mt(inode->i_atime); 793 file->content_mod_date = hfsp_ut2mt(inode->i_mtime); 794 file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime); 795 hfs_bnode_write(hfsplus_handle, fd.bnode, &entry, fd.entryoffset, 796 sizeof(struct hfsplus_cat_file)); 797 } 798out: 799 if (hfsplus_handle->journaled != HFSPLUS_JOURNAL_PRESENT) { 800 hfs_find_exit(hfsplus_handle, &fd); 801 } else { 802 hfsplus_journalled_find_exit(hfsplus_handle, &fd); 803 } 804 return 0; 805} 806