1 /* 2 * inode.c 3 * 4 * PURPOSE 5 * Inode handling routines for the OSTA-UDF(tm) filesystem. 6 * 7 * COPYRIGHT 8 * This file is distributed under the terms of the GNU General Public 9 * License (GPL). Copies of the GPL can be obtained from: 10 * ftp://prep.ai.mit.edu/pub/gnu/GPL 11 * Each contributing author retains all rights to their own work. 12 * 13 * (C) 1998 Dave Boynton 14 * (C) 1998-2004 Ben Fennema 15 * (C) 1999-2000 Stelias Computing Inc 16 * 17 * HISTORY 18 * 19 * 10/04/98 dgb Added rudimentary directory functions 20 * 10/07/98 Fully working udf_block_map! It works! 21 * 11/25/98 bmap altered to better support extents 22 * 12/06/98 blf partition support in udf_iget, udf_block_map 23 * and udf_read_inode 24 * 12/12/98 rewrote udf_block_map to handle next extents and descs across 25 * block boundaries (which is not actually allowed) 26 * 12/20/98 added support for strategy 4096 27 * 03/07/99 rewrote udf_block_map (again) 28 * New funcs, inode_bmap, udf_next_aext 29 * 04/19/99 Support for writing device EA's for major/minor # 30 */ 31 32 #include "udfdecl.h" 33 #include <linux/mm.h> 34 #include <linux/smp_lock.h> 35 #include <linux/module.h> 36 #include <linux/pagemap.h> 37 #include <linux/buffer_head.h> 38 #include <linux/writeback.h> 39 #include <linux/slab.h> 40 #include <linux/crc-itu-t.h> 41 42 #include "udf_i.h" 43 #include "udf_sb.h" 44 45 MODULE_AUTHOR("Ben Fennema"); 46 MODULE_DESCRIPTION("Universal Disk Format Filesystem"); 47 MODULE_LICENSE("GPL"); 48 49 #define EXTENT_MERGE_SIZE 5 50 51 static mode_t udf_convert_permissions(struct fileEntry *); 52 static int udf_update_inode(struct inode *, int); 53 static void udf_fill_inode(struct inode *, struct buffer_head *); 54 static int udf_sync_inode(struct inode *inode); 55 static int udf_alloc_i_data(struct inode *inode, size_t size); 56 static struct buffer_head *inode_getblk(struct inode *, sector_t, int *, 57 sector_t *, int *); 58 static int8_t udf_insert_aext(struct inode *, struct extent_position, 59 struct kernel_lb_addr, uint32_t); 60 static void udf_split_extents(struct inode *, int *, int, int, 61 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); 62 static void udf_prealloc_extents(struct inode *, int, int, 63 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); 64 static void udf_merge_extents(struct inode *, 65 struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); 66 static void udf_update_extents(struct inode *, 67 struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int, 68 struct extent_position *); 69 static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); 70 71 72 void udf_evict_inode(struct inode *inode) 73 { 74 struct udf_inode_info *iinfo = UDF_I(inode); 75 int want_delete = 0; 76 77 truncate_inode_pages(&inode->i_data, 0); 78 79 if (!inode->i_nlink && !is_bad_inode(inode)) { 80 want_delete = 1; 81 inode->i_size = 0; 82 udf_truncate(inode); 83 udf_update_inode(inode, IS_SYNC(inode)); 84 } 85 invalidate_inode_buffers(inode); 86 end_writeback(inode); 87 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && 88 inode->i_size != iinfo->i_lenExtents) { 89 printk(KERN_WARNING "UDF-fs (%s): Inode %lu (mode %o) has " 90 "inode size %llu different from extent length %llu. " 91 "Filesystem need not be standards compliant.\n", 92 inode->i_sb->s_id, inode->i_ino, inode->i_mode, 93 (unsigned long long)inode->i_size, 94 (unsigned long long)iinfo->i_lenExtents); 95 } 96 kfree(iinfo->i_ext.i_data); 97 iinfo->i_ext.i_data = NULL; 98 if (want_delete) { 99 lock_kernel(); 100 udf_free_inode(inode); 101 unlock_kernel(); 102 } 103 } 104 105 static int udf_writepage(struct page *page, struct writeback_control *wbc) 106 { 107 return block_write_full_page(page, udf_get_block, wbc); 108 } 109 110 static int udf_readpage(struct file *file, struct page *page) 111 { 112 return block_read_full_page(page, udf_get_block); 113 } 114 115 static int udf_write_begin(struct file *file, struct address_space *mapping, 116 loff_t pos, unsigned len, unsigned flags, 117 struct page **pagep, void **fsdata) 118 { 119 int ret; 120 121 ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block); 122 if (unlikely(ret)) { 123 loff_t isize = mapping->host->i_size; 124 if (pos + len > isize) 125 vmtruncate(mapping->host, isize); 126 } 127 128 return ret; 129 } 130 131 static sector_t udf_bmap(struct address_space *mapping, sector_t block) 132 { 133 return generic_block_bmap(mapping, block, udf_get_block); 134 } 135 136 const struct address_space_operations udf_aops = { 137 .readpage = udf_readpage, 138 .writepage = udf_writepage, 139 .sync_page = block_sync_page, 140 .write_begin = udf_write_begin, 141 .write_end = generic_write_end, 142 .bmap = udf_bmap, 143 }; 144 145 void udf_expand_file_adinicb(struct inode *inode, int newsize, int *err) 146 { 147 struct page *page; 148 char *kaddr; 149 struct udf_inode_info *iinfo = UDF_I(inode); 150 struct writeback_control udf_wbc = { 151 .sync_mode = WB_SYNC_NONE, 152 .nr_to_write = 1, 153 }; 154 155 /* from now on we have normal address_space methods */ 156 inode->i_data.a_ops = &udf_aops; 157 158 if (!iinfo->i_lenAlloc) { 159 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 160 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; 161 else 162 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; 163 mark_inode_dirty(inode); 164 return; 165 } 166 167 page = grab_cache_page(inode->i_mapping, 0); 168 BUG_ON(!PageLocked(page)); 169 170 if (!PageUptodate(page)) { 171 kaddr = kmap(page); 172 memset(kaddr + iinfo->i_lenAlloc, 0x00, 173 PAGE_CACHE_SIZE - iinfo->i_lenAlloc); 174 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, 175 iinfo->i_lenAlloc); 176 flush_dcache_page(page); 177 SetPageUptodate(page); 178 kunmap(page); 179 } 180 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, 181 iinfo->i_lenAlloc); 182 iinfo->i_lenAlloc = 0; 183 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 184 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; 185 else 186 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; 187 188 inode->i_data.a_ops->writepage(page, &udf_wbc); 189 page_cache_release(page); 190 191 mark_inode_dirty(inode); 192 } 193 194 struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, 195 int *err) 196 { 197 int newblock; 198 struct buffer_head *dbh = NULL; 199 struct kernel_lb_addr eloc; 200 uint8_t alloctype; 201 struct extent_position epos; 202 203 struct udf_fileident_bh sfibh, dfibh; 204 loff_t f_pos = udf_ext0_offset(inode); 205 int size = udf_ext0_offset(inode) + inode->i_size; 206 struct fileIdentDesc cfi, *sfi, *dfi; 207 struct udf_inode_info *iinfo = UDF_I(inode); 208 209 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 210 alloctype = ICBTAG_FLAG_AD_SHORT; 211 else 212 alloctype = ICBTAG_FLAG_AD_LONG; 213 214 if (!inode->i_size) { 215 iinfo->i_alloc_type = alloctype; 216 mark_inode_dirty(inode); 217 return NULL; 218 } 219 220 /* alloc block, and copy data to it */ 221 *block = udf_new_block(inode->i_sb, inode, 222 iinfo->i_location.partitionReferenceNum, 223 iinfo->i_location.logicalBlockNum, err); 224 if (!(*block)) 225 return NULL; 226 newblock = udf_get_pblock(inode->i_sb, *block, 227 iinfo->i_location.partitionReferenceNum, 228 0); 229 if (!newblock) 230 return NULL; 231 dbh = udf_tgetblk(inode->i_sb, newblock); 232 if (!dbh) 233 return NULL; 234 lock_buffer(dbh); 235 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); 236 set_buffer_uptodate(dbh); 237 unlock_buffer(dbh); 238 mark_buffer_dirty_inode(dbh, inode); 239 240 sfibh.soffset = sfibh.eoffset = 241 f_pos & (inode->i_sb->s_blocksize - 1); 242 sfibh.sbh = sfibh.ebh = NULL; 243 dfibh.soffset = dfibh.eoffset = 0; 244 dfibh.sbh = dfibh.ebh = dbh; 245 while (f_pos < size) { 246 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; 247 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, 248 NULL, NULL, NULL); 249 if (!sfi) { 250 brelse(dbh); 251 return NULL; 252 } 253 iinfo->i_alloc_type = alloctype; 254 sfi->descTag.tagLocation = cpu_to_le32(*block); 255 dfibh.soffset = dfibh.eoffset; 256 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); 257 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); 258 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, 259 sfi->fileIdent + 260 le16_to_cpu(sfi->lengthOfImpUse))) { 261 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; 262 brelse(dbh); 263 return NULL; 264 } 265 } 266 mark_buffer_dirty_inode(dbh, inode); 267 268 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, 269 iinfo->i_lenAlloc); 270 iinfo->i_lenAlloc = 0; 271 eloc.logicalBlockNum = *block; 272 eloc.partitionReferenceNum = 273 iinfo->i_location.partitionReferenceNum; 274 iinfo->i_lenExtents = inode->i_size; 275 epos.bh = NULL; 276 epos.block = iinfo->i_location; 277 epos.offset = udf_file_entry_alloc_offset(inode); 278 udf_add_aext(inode, &epos, &eloc, inode->i_size, 0); 279 /* UniqueID stuff */ 280 281 brelse(epos.bh); 282 mark_inode_dirty(inode); 283 return dbh; 284 } 285 286 static int udf_get_block(struct inode *inode, sector_t block, 287 struct buffer_head *bh_result, int create) 288 { 289 int err, new; 290 struct buffer_head *bh; 291 sector_t phys = 0; 292 struct udf_inode_info *iinfo; 293 294 if (!create) { 295 phys = udf_block_map(inode, block); 296 if (phys) 297 map_bh(bh_result, inode->i_sb, phys); 298 return 0; 299 } 300 301 err = -EIO; 302 new = 0; 303 bh = NULL; 304 iinfo = UDF_I(inode); 305 306 down_write(&iinfo->i_data_sem); 307 if (block == iinfo->i_next_alloc_block + 1) { 308 iinfo->i_next_alloc_block++; 309 iinfo->i_next_alloc_goal++; 310 } 311 312 err = 0; 313 314 bh = inode_getblk(inode, block, &err, &phys, &new); 315 BUG_ON(bh); 316 if (err) 317 goto abort; 318 BUG_ON(!phys); 319 320 if (new) 321 set_buffer_new(bh_result); 322 map_bh(bh_result, inode->i_sb, phys); 323 324 abort: 325 up_write(&iinfo->i_data_sem); 326 return err; 327 } 328 329 static struct buffer_head *udf_getblk(struct inode *inode, long block, 330 int create, int *err) 331 { 332 struct buffer_head *bh; 333 struct buffer_head dummy; 334 335 dummy.b_state = 0; 336 dummy.b_blocknr = -1000; 337 *err = udf_get_block(inode, block, &dummy, create); 338 if (!*err && buffer_mapped(&dummy)) { 339 bh = sb_getblk(inode->i_sb, dummy.b_blocknr); 340 if (buffer_new(&dummy)) { 341 lock_buffer(bh); 342 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); 343 set_buffer_uptodate(bh); 344 unlock_buffer(bh); 345 mark_buffer_dirty_inode(bh, inode); 346 } 347 return bh; 348 } 349 350 return NULL; 351 } 352 353 /* Extend the file by 'blocks' blocks, return the number of extents added */ 354 int udf_extend_file(struct inode *inode, struct extent_position *last_pos, 355 struct kernel_long_ad *last_ext, sector_t blocks) 356 { 357 sector_t add; 358 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); 359 struct super_block *sb = inode->i_sb; 360 struct kernel_lb_addr prealloc_loc = {}; 361 int prealloc_len = 0; 362 struct udf_inode_info *iinfo; 363 364 /* The previous extent is fake and we should not extend by anything 365 * - there's nothing to do... */ 366 if (!blocks && fake) 367 return 0; 368 369 iinfo = UDF_I(inode); 370 /* Round the last extent up to a multiple of block size */ 371 if (last_ext->extLength & (sb->s_blocksize - 1)) { 372 last_ext->extLength = 373 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | 374 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + 375 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); 376 iinfo->i_lenExtents = 377 (iinfo->i_lenExtents + sb->s_blocksize - 1) & 378 ~(sb->s_blocksize - 1); 379 } 380 381 /* Last extent are just preallocated blocks? */ 382 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == 383 EXT_NOT_RECORDED_ALLOCATED) { 384 /* Save the extent so that we can reattach it to the end */ 385 prealloc_loc = last_ext->extLocation; 386 prealloc_len = last_ext->extLength; 387 /* Mark the extent as a hole */ 388 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | 389 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); 390 last_ext->extLocation.logicalBlockNum = 0; 391 last_ext->extLocation.partitionReferenceNum = 0; 392 } 393 394 /* Can we merge with the previous extent? */ 395 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == 396 EXT_NOT_RECORDED_NOT_ALLOCATED) { 397 add = ((1 << 30) - sb->s_blocksize - 398 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> 399 sb->s_blocksize_bits; 400 if (add > blocks) 401 add = blocks; 402 blocks -= add; 403 last_ext->extLength += add << sb->s_blocksize_bits; 404 } 405 406 if (fake) { 407 udf_add_aext(inode, last_pos, &last_ext->extLocation, 408 last_ext->extLength, 1); 409 count++; 410 } else 411 udf_write_aext(inode, last_pos, &last_ext->extLocation, 412 last_ext->extLength, 1); 413 414 /* Managed to do everything necessary? */ 415 if (!blocks) 416 goto out; 417 418 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ 419 last_ext->extLocation.logicalBlockNum = 0; 420 last_ext->extLocation.partitionReferenceNum = 0; 421 add = (1 << (30-sb->s_blocksize_bits)) - 1; 422 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | 423 (add << sb->s_blocksize_bits); 424 425 /* Create enough extents to cover the whole hole */ 426 while (blocks > add) { 427 blocks -= add; 428 if (udf_add_aext(inode, last_pos, &last_ext->extLocation, 429 last_ext->extLength, 1) == -1) 430 return -1; 431 count++; 432 } 433 if (blocks) { 434 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | 435 (blocks << sb->s_blocksize_bits); 436 if (udf_add_aext(inode, last_pos, &last_ext->extLocation, 437 last_ext->extLength, 1) == -1) 438 return -1; 439 count++; 440 } 441 442 out: 443 /* Do we have some preallocated blocks saved? */ 444 if (prealloc_len) { 445 if (udf_add_aext(inode, last_pos, &prealloc_loc, 446 prealloc_len, 1) == -1) 447 return -1; 448 last_ext->extLocation = prealloc_loc; 449 last_ext->extLength = prealloc_len; 450 count++; 451 } 452 453 /* last_pos should point to the last written extent... */ 454 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 455 last_pos->offset -= sizeof(struct short_ad); 456 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 457 last_pos->offset -= sizeof(struct long_ad); 458 else 459 return -1; 460 461 return count; 462 } 463 464 static struct buffer_head *inode_getblk(struct inode *inode, sector_t block, 465 int *err, sector_t *phys, int *new) 466 { 467 static sector_t last_block; 468 struct buffer_head *result = NULL; 469 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; 470 struct extent_position prev_epos, cur_epos, next_epos; 471 int count = 0, startnum = 0, endnum = 0; 472 uint32_t elen = 0, tmpelen; 473 struct kernel_lb_addr eloc, tmpeloc; 474 int c = 1; 475 loff_t lbcount = 0, b_off = 0; 476 uint32_t newblocknum, newblock; 477 sector_t offset = 0; 478 int8_t etype; 479 struct udf_inode_info *iinfo = UDF_I(inode); 480 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; 481 int lastblock = 0; 482 483 prev_epos.offset = udf_file_entry_alloc_offset(inode); 484 prev_epos.block = iinfo->i_location; 485 prev_epos.bh = NULL; 486 cur_epos = next_epos = prev_epos; 487 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; 488 489 /* find the extent which contains the block we are looking for. 490 alternate between laarr[0] and laarr[1] for locations of the 491 current extent, and the previous extent */ 492 do { 493 if (prev_epos.bh != cur_epos.bh) { 494 brelse(prev_epos.bh); 495 get_bh(cur_epos.bh); 496 prev_epos.bh = cur_epos.bh; 497 } 498 if (cur_epos.bh != next_epos.bh) { 499 brelse(cur_epos.bh); 500 get_bh(next_epos.bh); 501 cur_epos.bh = next_epos.bh; 502 } 503 504 lbcount += elen; 505 506 prev_epos.block = cur_epos.block; 507 cur_epos.block = next_epos.block; 508 509 prev_epos.offset = cur_epos.offset; 510 cur_epos.offset = next_epos.offset; 511 512 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); 513 if (etype == -1) 514 break; 515 516 c = !c; 517 518 laarr[c].extLength = (etype << 30) | elen; 519 laarr[c].extLocation = eloc; 520 521 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) 522 pgoal = eloc.logicalBlockNum + 523 ((elen + inode->i_sb->s_blocksize - 1) >> 524 inode->i_sb->s_blocksize_bits); 525 526 count++; 527 } while (lbcount + elen <= b_off); 528 529 b_off -= lbcount; 530 offset = b_off >> inode->i_sb->s_blocksize_bits; 531 /* 532 * Move prev_epos and cur_epos into indirect extent if we are at 533 * the pointer to it 534 */ 535 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); 536 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); 537 538 /* if the extent is allocated and recorded, return the block 539 if the extent is not a multiple of the blocksize, round up */ 540 541 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { 542 if (elen & (inode->i_sb->s_blocksize - 1)) { 543 elen = EXT_RECORDED_ALLOCATED | 544 ((elen + inode->i_sb->s_blocksize - 1) & 545 ~(inode->i_sb->s_blocksize - 1)); 546 etype = udf_write_aext(inode, &cur_epos, &eloc, elen, 1); 547 } 548 brelse(prev_epos.bh); 549 brelse(cur_epos.bh); 550 brelse(next_epos.bh); 551 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset); 552 *phys = newblock; 553 return NULL; 554 } 555 556 last_block = block; 557 /* Are we beyond EOF? */ 558 if (etype == -1) { 559 int ret; 560 561 if (count) { 562 if (c) 563 laarr[0] = laarr[1]; 564 startnum = 1; 565 } else { 566 /* Create a fake extent when there's not one */ 567 memset(&laarr[0].extLocation, 0x00, 568 sizeof(struct kernel_lb_addr)); 569 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; 570 /* Will udf_extend_file() create real extent from 571 a fake one? */ 572 startnum = (offset > 0); 573 } 574 /* Create extents for the hole between EOF and offset */ 575 ret = udf_extend_file(inode, &prev_epos, laarr, offset); 576 if (ret == -1) { 577 brelse(prev_epos.bh); 578 brelse(cur_epos.bh); 579 brelse(next_epos.bh); 580 /* We don't really know the error here so we just make 581 * something up */ 582 *err = -ENOSPC; 583 return NULL; 584 } 585 c = 0; 586 offset = 0; 587 count += ret; 588 /* We are not covered by a preallocated extent? */ 589 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != 590 EXT_NOT_RECORDED_ALLOCATED) { 591 /* Is there any real extent? - otherwise we overwrite 592 * the fake one... */ 593 if (count) 594 c = !c; 595 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | 596 inode->i_sb->s_blocksize; 597 memset(&laarr[c].extLocation, 0x00, 598 sizeof(struct kernel_lb_addr)); 599 count++; 600 endnum++; 601 } 602 endnum = c + 1; 603 lastblock = 1; 604 } else { 605 endnum = startnum = ((count > 2) ? 2 : count); 606 607 /* if the current extent is in position 0, 608 swap it with the previous */ 609 if (!c && count != 1) { 610 laarr[2] = laarr[0]; 611 laarr[0] = laarr[1]; 612 laarr[1] = laarr[2]; 613 c = 1; 614 } 615 616 /* if the current block is located in an extent, 617 read the next extent */ 618 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); 619 if (etype != -1) { 620 laarr[c + 1].extLength = (etype << 30) | elen; 621 laarr[c + 1].extLocation = eloc; 622 count++; 623 startnum++; 624 endnum++; 625 } else 626 lastblock = 1; 627 } 628 629 /* if the current extent is not recorded but allocated, get the 630 * block in the extent corresponding to the requested block */ 631 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) 632 newblocknum = laarr[c].extLocation.logicalBlockNum + offset; 633 else { /* otherwise, allocate a new block */ 634 if (iinfo->i_next_alloc_block == block) 635 goal = iinfo->i_next_alloc_goal; 636 637 if (!goal) { 638 if (!(goal = pgoal)) /* XXX: what was intended here? */ 639 goal = iinfo->i_location.logicalBlockNum + 1; 640 } 641 642 newblocknum = udf_new_block(inode->i_sb, inode, 643 iinfo->i_location.partitionReferenceNum, 644 goal, err); 645 if (!newblocknum) { 646 brelse(prev_epos.bh); 647 *err = -ENOSPC; 648 return NULL; 649 } 650 iinfo->i_lenExtents += inode->i_sb->s_blocksize; 651 } 652 653 /* if the extent the requsted block is located in contains multiple 654 * blocks, split the extent into at most three extents. blocks prior 655 * to requested block, requested block, and blocks after requested 656 * block */ 657 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); 658 659 #ifdef UDF_PREALLOCATE 660 /* We preallocate blocks only for regular files. It also makes sense 661 * for directories but there's a problem when to drop the 662 * preallocation. We might use some delayed work for that but I feel 663 * it's overengineering for a filesystem like UDF. */ 664 if (S_ISREG(inode->i_mode)) 665 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); 666 #endif 667 668 /* merge any continuous blocks in laarr */ 669 udf_merge_extents(inode, laarr, &endnum); 670 671 /* write back the new extents, inserting new extents if the new number 672 * of extents is greater than the old number, and deleting extents if 673 * the new number of extents is less than the old number */ 674 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); 675 676 brelse(prev_epos.bh); 677 678 newblock = udf_get_pblock(inode->i_sb, newblocknum, 679 iinfo->i_location.partitionReferenceNum, 0); 680 if (!newblock) 681 return NULL; 682 *phys = newblock; 683 *err = 0; 684 *new = 1; 685 iinfo->i_next_alloc_block = block; 686 iinfo->i_next_alloc_goal = newblocknum; 687 inode->i_ctime = current_fs_time(inode->i_sb); 688 689 if (IS_SYNC(inode)) 690 udf_sync_inode(inode); 691 else 692 mark_inode_dirty(inode); 693 694 return result; 695 } 696 697 static void udf_split_extents(struct inode *inode, int *c, int offset, 698 int newblocknum, 699 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], 700 int *endnum) 701 { 702 unsigned long blocksize = inode->i_sb->s_blocksize; 703 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; 704 705 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || 706 (laarr[*c].extLength >> 30) == 707 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { 708 int curr = *c; 709 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + 710 blocksize - 1) >> blocksize_bits; 711 int8_t etype = (laarr[curr].extLength >> 30); 712 713 if (blen == 1) 714 ; 715 else if (!offset || blen == offset + 1) { 716 laarr[curr + 2] = laarr[curr + 1]; 717 laarr[curr + 1] = laarr[curr]; 718 } else { 719 laarr[curr + 3] = laarr[curr + 1]; 720 laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; 721 } 722 723 if (offset) { 724 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { 725 udf_free_blocks(inode->i_sb, inode, 726 &laarr[curr].extLocation, 727 0, offset); 728 laarr[curr].extLength = 729 EXT_NOT_RECORDED_NOT_ALLOCATED | 730 (offset << blocksize_bits); 731 laarr[curr].extLocation.logicalBlockNum = 0; 732 laarr[curr].extLocation. 733 partitionReferenceNum = 0; 734 } else 735 laarr[curr].extLength = (etype << 30) | 736 (offset << blocksize_bits); 737 curr++; 738 (*c)++; 739 (*endnum)++; 740 } 741 742 laarr[curr].extLocation.logicalBlockNum = newblocknum; 743 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) 744 laarr[curr].extLocation.partitionReferenceNum = 745 UDF_I(inode)->i_location.partitionReferenceNum; 746 laarr[curr].extLength = EXT_RECORDED_ALLOCATED | 747 blocksize; 748 curr++; 749 750 if (blen != offset + 1) { 751 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) 752 laarr[curr].extLocation.logicalBlockNum += 753 offset + 1; 754 laarr[curr].extLength = (etype << 30) | 755 ((blen - (offset + 1)) << blocksize_bits); 756 curr++; 757 (*endnum)++; 758 } 759 } 760 } 761 762 static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, 763 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], 764 int *endnum) 765 { 766 int start, length = 0, currlength = 0, i; 767 768 if (*endnum >= (c + 1)) { 769 if (!lastblock) 770 return; 771 else 772 start = c; 773 } else { 774 if ((laarr[c + 1].extLength >> 30) == 775 (EXT_NOT_RECORDED_ALLOCATED >> 30)) { 776 start = c + 1; 777 length = currlength = 778 (((laarr[c + 1].extLength & 779 UDF_EXTENT_LENGTH_MASK) + 780 inode->i_sb->s_blocksize - 1) >> 781 inode->i_sb->s_blocksize_bits); 782 } else 783 start = c; 784 } 785 786 for (i = start + 1; i <= *endnum; i++) { 787 if (i == *endnum) { 788 if (lastblock) 789 length += UDF_DEFAULT_PREALLOC_BLOCKS; 790 } else if ((laarr[i].extLength >> 30) == 791 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { 792 length += (((laarr[i].extLength & 793 UDF_EXTENT_LENGTH_MASK) + 794 inode->i_sb->s_blocksize - 1) >> 795 inode->i_sb->s_blocksize_bits); 796 } else 797 break; 798 } 799 800 if (length) { 801 int next = laarr[start].extLocation.logicalBlockNum + 802 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + 803 inode->i_sb->s_blocksize - 1) >> 804 inode->i_sb->s_blocksize_bits); 805 int numalloc = udf_prealloc_blocks(inode->i_sb, inode, 806 laarr[start].extLocation.partitionReferenceNum, 807 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? 808 length : UDF_DEFAULT_PREALLOC_BLOCKS) - 809 currlength); 810 if (numalloc) { 811 if (start == (c + 1)) 812 laarr[start].extLength += 813 (numalloc << 814 inode->i_sb->s_blocksize_bits); 815 else { 816 memmove(&laarr[c + 2], &laarr[c + 1], 817 sizeof(struct long_ad) * (*endnum - (c + 1))); 818 (*endnum)++; 819 laarr[c + 1].extLocation.logicalBlockNum = next; 820 laarr[c + 1].extLocation.partitionReferenceNum = 821 laarr[c].extLocation. 822 partitionReferenceNum; 823 laarr[c + 1].extLength = 824 EXT_NOT_RECORDED_ALLOCATED | 825 (numalloc << 826 inode->i_sb->s_blocksize_bits); 827 start = c + 1; 828 } 829 830 for (i = start + 1; numalloc && i < *endnum; i++) { 831 int elen = ((laarr[i].extLength & 832 UDF_EXTENT_LENGTH_MASK) + 833 inode->i_sb->s_blocksize - 1) >> 834 inode->i_sb->s_blocksize_bits; 835 836 if (elen > numalloc) { 837 laarr[i].extLength -= 838 (numalloc << 839 inode->i_sb->s_blocksize_bits); 840 numalloc = 0; 841 } else { 842 numalloc -= elen; 843 if (*endnum > (i + 1)) 844 memmove(&laarr[i], 845 &laarr[i + 1], 846 sizeof(struct long_ad) * 847 (*endnum - (i + 1))); 848 i--; 849 (*endnum)--; 850 } 851 } 852 UDF_I(inode)->i_lenExtents += 853 numalloc << inode->i_sb->s_blocksize_bits; 854 } 855 } 856 } 857 858 static void udf_merge_extents(struct inode *inode, 859 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], 860 int *endnum) 861 { 862 int i; 863 unsigned long blocksize = inode->i_sb->s_blocksize; 864 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; 865 866 for (i = 0; i < (*endnum - 1); i++) { 867 struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; 868 struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; 869 870 if (((li->extLength >> 30) == (lip1->extLength >> 30)) && 871 (((li->extLength >> 30) == 872 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || 873 ((lip1->extLocation.logicalBlockNum - 874 li->extLocation.logicalBlockNum) == 875 (((li->extLength & UDF_EXTENT_LENGTH_MASK) + 876 blocksize - 1) >> blocksize_bits)))) { 877 878 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + 879 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + 880 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { 881 lip1->extLength = (lip1->extLength - 882 (li->extLength & 883 UDF_EXTENT_LENGTH_MASK) + 884 UDF_EXTENT_LENGTH_MASK) & 885 ~(blocksize - 1); 886 li->extLength = (li->extLength & 887 UDF_EXTENT_FLAG_MASK) + 888 (UDF_EXTENT_LENGTH_MASK + 1) - 889 blocksize; 890 lip1->extLocation.logicalBlockNum = 891 li->extLocation.logicalBlockNum + 892 ((li->extLength & 893 UDF_EXTENT_LENGTH_MASK) >> 894 blocksize_bits); 895 } else { 896 li->extLength = lip1->extLength + 897 (((li->extLength & 898 UDF_EXTENT_LENGTH_MASK) + 899 blocksize - 1) & ~(blocksize - 1)); 900 if (*endnum > (i + 2)) 901 memmove(&laarr[i + 1], &laarr[i + 2], 902 sizeof(struct long_ad) * 903 (*endnum - (i + 2))); 904 i--; 905 (*endnum)--; 906 } 907 } else if (((li->extLength >> 30) == 908 (EXT_NOT_RECORDED_ALLOCATED >> 30)) && 909 ((lip1->extLength >> 30) == 910 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { 911 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, 912 ((li->extLength & 913 UDF_EXTENT_LENGTH_MASK) + 914 blocksize - 1) >> blocksize_bits); 915 li->extLocation.logicalBlockNum = 0; 916 li->extLocation.partitionReferenceNum = 0; 917 918 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + 919 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + 920 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { 921 lip1->extLength = (lip1->extLength - 922 (li->extLength & 923 UDF_EXTENT_LENGTH_MASK) + 924 UDF_EXTENT_LENGTH_MASK) & 925 ~(blocksize - 1); 926 li->extLength = (li->extLength & 927 UDF_EXTENT_FLAG_MASK) + 928 (UDF_EXTENT_LENGTH_MASK + 1) - 929 blocksize; 930 } else { 931 li->extLength = lip1->extLength + 932 (((li->extLength & 933 UDF_EXTENT_LENGTH_MASK) + 934 blocksize - 1) & ~(blocksize - 1)); 935 if (*endnum > (i + 2)) 936 memmove(&laarr[i + 1], &laarr[i + 2], 937 sizeof(struct long_ad) * 938 (*endnum - (i + 2))); 939 i--; 940 (*endnum)--; 941 } 942 } else if ((li->extLength >> 30) == 943 (EXT_NOT_RECORDED_ALLOCATED >> 30)) { 944 udf_free_blocks(inode->i_sb, inode, 945 &li->extLocation, 0, 946 ((li->extLength & 947 UDF_EXTENT_LENGTH_MASK) + 948 blocksize - 1) >> blocksize_bits); 949 li->extLocation.logicalBlockNum = 0; 950 li->extLocation.partitionReferenceNum = 0; 951 li->extLength = (li->extLength & 952 UDF_EXTENT_LENGTH_MASK) | 953 EXT_NOT_RECORDED_NOT_ALLOCATED; 954 } 955 } 956 } 957 958 static void udf_update_extents(struct inode *inode, 959 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], 960 int startnum, int endnum, 961 struct extent_position *epos) 962 { 963 int start = 0, i; 964 struct kernel_lb_addr tmploc; 965 uint32_t tmplen; 966 967 if (startnum > endnum) { 968 for (i = 0; i < (startnum - endnum); i++) 969 udf_delete_aext(inode, *epos, laarr[i].extLocation, 970 laarr[i].extLength); 971 } else if (startnum < endnum) { 972 for (i = 0; i < (endnum - startnum); i++) { 973 udf_insert_aext(inode, *epos, laarr[i].extLocation, 974 laarr[i].extLength); 975 udf_next_aext(inode, epos, &laarr[i].extLocation, 976 &laarr[i].extLength, 1); 977 start++; 978 } 979 } 980 981 for (i = start; i < endnum; i++) { 982 udf_next_aext(inode, epos, &tmploc, &tmplen, 0); 983 udf_write_aext(inode, epos, &laarr[i].extLocation, 984 laarr[i].extLength, 1); 985 } 986 } 987 988 struct buffer_head *udf_bread(struct inode *inode, int block, 989 int create, int *err) 990 { 991 struct buffer_head *bh = NULL; 992 993 bh = udf_getblk(inode, block, create, err); 994 if (!bh) 995 return NULL; 996 997 if (buffer_uptodate(bh)) 998 return bh; 999 1000 ll_rw_block(READ, 1, &bh); 1001 1002 wait_on_buffer(bh); 1003 if (buffer_uptodate(bh)) 1004 return bh; 1005 1006 brelse(bh); 1007 *err = -EIO; 1008 return NULL; 1009 } 1010 1011 void udf_truncate(struct inode *inode) 1012 { 1013 int offset; 1014 int err; 1015 struct udf_inode_info *iinfo; 1016 1017 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1018 S_ISLNK(inode->i_mode))) 1019 return; 1020 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1021 return; 1022 1023 iinfo = UDF_I(inode); 1024 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { 1025 down_write(&iinfo->i_data_sem); 1026 if (inode->i_sb->s_blocksize < 1027 (udf_file_entry_alloc_offset(inode) + 1028 inode->i_size)) { 1029 udf_expand_file_adinicb(inode, inode->i_size, &err); 1030 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { 1031 inode->i_size = iinfo->i_lenAlloc; 1032 up_write(&iinfo->i_data_sem); 1033 return; 1034 } else 1035 udf_truncate_extents(inode); 1036 } else { 1037 offset = inode->i_size & (inode->i_sb->s_blocksize - 1); 1038 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset, 1039 0x00, inode->i_sb->s_blocksize - 1040 offset - udf_file_entry_alloc_offset(inode)); 1041 iinfo->i_lenAlloc = inode->i_size; 1042 } 1043 up_write(&iinfo->i_data_sem); 1044 } else { 1045 block_truncate_page(inode->i_mapping, inode->i_size, 1046 udf_get_block); 1047 down_write(&iinfo->i_data_sem); 1048 udf_truncate_extents(inode); 1049 up_write(&iinfo->i_data_sem); 1050 } 1051 1052 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); 1053 if (IS_SYNC(inode)) 1054 udf_sync_inode(inode); 1055 else 1056 mark_inode_dirty(inode); 1057 } 1058 1059 static void __udf_read_inode(struct inode *inode) 1060 { 1061 struct buffer_head *bh = NULL; 1062 struct fileEntry *fe; 1063 uint16_t ident; 1064 struct udf_inode_info *iinfo = UDF_I(inode); 1065 1066 /* 1067 * Set defaults, but the inode is still incomplete! 1068 * Note: get_new_inode() sets the following on a new inode: 1069 * i_sb = sb 1070 * i_no = ino 1071 * i_flags = sb->s_flags 1072 * i_state = 0 1073 * clean_inode(): zero fills and sets 1074 * i_count = 1 1075 * i_nlink = 1 1076 * i_op = NULL; 1077 */ 1078 bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident); 1079 if (!bh) { 1080 printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n", 1081 inode->i_ino); 1082 make_bad_inode(inode); 1083 return; 1084 } 1085 1086 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && 1087 ident != TAG_IDENT_USE) { 1088 printk(KERN_ERR "udf: udf_read_inode(ino %ld) " 1089 "failed ident=%d\n", inode->i_ino, ident); 1090 brelse(bh); 1091 make_bad_inode(inode); 1092 return; 1093 } 1094 1095 fe = (struct fileEntry *)bh->b_data; 1096 1097 if (fe->icbTag.strategyType == cpu_to_le16(4096)) { 1098 struct buffer_head *ibh; 1099 1100 ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1, 1101 &ident); 1102 if (ident == TAG_IDENT_IE && ibh) { 1103 struct buffer_head *nbh = NULL; 1104 struct kernel_lb_addr loc; 1105 struct indirectEntry *ie; 1106 1107 ie = (struct indirectEntry *)ibh->b_data; 1108 loc = lelb_to_cpu(ie->indirectICB.extLocation); 1109 1110 if (ie->indirectICB.extLength && 1111 (nbh = udf_read_ptagged(inode->i_sb, &loc, 0, 1112 &ident))) { 1113 if (ident == TAG_IDENT_FE || 1114 ident == TAG_IDENT_EFE) { 1115 memcpy(&iinfo->i_location, 1116 &loc, 1117 sizeof(struct kernel_lb_addr)); 1118 brelse(bh); 1119 brelse(ibh); 1120 brelse(nbh); 1121 __udf_read_inode(inode); 1122 return; 1123 } 1124 brelse(nbh); 1125 } 1126 } 1127 brelse(ibh); 1128 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { 1129 printk(KERN_ERR "udf: unsupported strategy type: %d\n", 1130 le16_to_cpu(fe->icbTag.strategyType)); 1131 brelse(bh); 1132 make_bad_inode(inode); 1133 return; 1134 } 1135 udf_fill_inode(inode, bh); 1136 1137 brelse(bh); 1138 } 1139 1140 static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) 1141 { 1142 struct fileEntry *fe; 1143 struct extendedFileEntry *efe; 1144 int offset; 1145 struct udf_sb_info *sbi = UDF_SB(inode->i_sb); 1146 struct udf_inode_info *iinfo = UDF_I(inode); 1147 1148 fe = (struct fileEntry *)bh->b_data; 1149 efe = (struct extendedFileEntry *)bh->b_data; 1150 1151 if (fe->icbTag.strategyType == cpu_to_le16(4)) 1152 iinfo->i_strat4096 = 0; 1153 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ 1154 iinfo->i_strat4096 = 1; 1155 1156 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & 1157 ICBTAG_FLAG_AD_MASK; 1158 iinfo->i_unique = 0; 1159 iinfo->i_lenEAttr = 0; 1160 iinfo->i_lenExtents = 0; 1161 iinfo->i_lenAlloc = 0; 1162 iinfo->i_next_alloc_block = 0; 1163 iinfo->i_next_alloc_goal = 0; 1164 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { 1165 iinfo->i_efe = 1; 1166 iinfo->i_use = 0; 1167 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - 1168 sizeof(struct extendedFileEntry))) { 1169 make_bad_inode(inode); 1170 return; 1171 } 1172 memcpy(iinfo->i_ext.i_data, 1173 bh->b_data + sizeof(struct extendedFileEntry), 1174 inode->i_sb->s_blocksize - 1175 sizeof(struct extendedFileEntry)); 1176 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { 1177 iinfo->i_efe = 0; 1178 iinfo->i_use = 0; 1179 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - 1180 sizeof(struct fileEntry))) { 1181 make_bad_inode(inode); 1182 return; 1183 } 1184 memcpy(iinfo->i_ext.i_data, 1185 bh->b_data + sizeof(struct fileEntry), 1186 inode->i_sb->s_blocksize - sizeof(struct fileEntry)); 1187 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { 1188 iinfo->i_efe = 0; 1189 iinfo->i_use = 1; 1190 iinfo->i_lenAlloc = le32_to_cpu( 1191 ((struct unallocSpaceEntry *)bh->b_data)-> 1192 lengthAllocDescs); 1193 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - 1194 sizeof(struct unallocSpaceEntry))) { 1195 make_bad_inode(inode); 1196 return; 1197 } 1198 memcpy(iinfo->i_ext.i_data, 1199 bh->b_data + sizeof(struct unallocSpaceEntry), 1200 inode->i_sb->s_blocksize - 1201 sizeof(struct unallocSpaceEntry)); 1202 return; 1203 } 1204 1205 read_lock(&sbi->s_cred_lock); 1206 inode->i_uid = le32_to_cpu(fe->uid); 1207 if (inode->i_uid == -1 || 1208 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || 1209 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) 1210 inode->i_uid = UDF_SB(inode->i_sb)->s_uid; 1211 1212 inode->i_gid = le32_to_cpu(fe->gid); 1213 if (inode->i_gid == -1 || 1214 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || 1215 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) 1216 inode->i_gid = UDF_SB(inode->i_sb)->s_gid; 1217 1218 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && 1219 sbi->s_fmode != UDF_INVALID_MODE) 1220 inode->i_mode = sbi->s_fmode; 1221 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && 1222 sbi->s_dmode != UDF_INVALID_MODE) 1223 inode->i_mode = sbi->s_dmode; 1224 else 1225 inode->i_mode = udf_convert_permissions(fe); 1226 inode->i_mode &= ~sbi->s_umask; 1227 read_unlock(&sbi->s_cred_lock); 1228 1229 inode->i_nlink = le16_to_cpu(fe->fileLinkCount); 1230 if (!inode->i_nlink) 1231 inode->i_nlink = 1; 1232 1233 inode->i_size = le64_to_cpu(fe->informationLength); 1234 iinfo->i_lenExtents = inode->i_size; 1235 1236 if (iinfo->i_efe == 0) { 1237 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << 1238 (inode->i_sb->s_blocksize_bits - 9); 1239 1240 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime)) 1241 inode->i_atime = sbi->s_record_time; 1242 1243 if (!udf_disk_stamp_to_time(&inode->i_mtime, 1244 fe->modificationTime)) 1245 inode->i_mtime = sbi->s_record_time; 1246 1247 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime)) 1248 inode->i_ctime = sbi->s_record_time; 1249 1250 iinfo->i_unique = le64_to_cpu(fe->uniqueID); 1251 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); 1252 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); 1253 offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr; 1254 } else { 1255 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << 1256 (inode->i_sb->s_blocksize_bits - 9); 1257 1258 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime)) 1259 inode->i_atime = sbi->s_record_time; 1260 1261 if (!udf_disk_stamp_to_time(&inode->i_mtime, 1262 efe->modificationTime)) 1263 inode->i_mtime = sbi->s_record_time; 1264 1265 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime)) 1266 iinfo->i_crtime = sbi->s_record_time; 1267 1268 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime)) 1269 inode->i_ctime = sbi->s_record_time; 1270 1271 iinfo->i_unique = le64_to_cpu(efe->uniqueID); 1272 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); 1273 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); 1274 offset = sizeof(struct extendedFileEntry) + 1275 iinfo->i_lenEAttr; 1276 } 1277 1278 switch (fe->icbTag.fileType) { 1279 case ICBTAG_FILE_TYPE_DIRECTORY: 1280 inode->i_op = &udf_dir_inode_operations; 1281 inode->i_fop = &udf_dir_operations; 1282 inode->i_mode |= S_IFDIR; 1283 inc_nlink(inode); 1284 break; 1285 case ICBTAG_FILE_TYPE_REALTIME: 1286 case ICBTAG_FILE_TYPE_REGULAR: 1287 case ICBTAG_FILE_TYPE_UNDEF: 1288 case ICBTAG_FILE_TYPE_VAT20: 1289 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 1290 inode->i_data.a_ops = &udf_adinicb_aops; 1291 else 1292 inode->i_data.a_ops = &udf_aops; 1293 inode->i_op = &udf_file_inode_operations; 1294 inode->i_fop = &udf_file_operations; 1295 inode->i_mode |= S_IFREG; 1296 break; 1297 case ICBTAG_FILE_TYPE_BLOCK: 1298 inode->i_mode |= S_IFBLK; 1299 break; 1300 case ICBTAG_FILE_TYPE_CHAR: 1301 inode->i_mode |= S_IFCHR; 1302 break; 1303 case ICBTAG_FILE_TYPE_FIFO: 1304 init_special_inode(inode, inode->i_mode | S_IFIFO, 0); 1305 break; 1306 case ICBTAG_FILE_TYPE_SOCKET: 1307 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); 1308 break; 1309 case ICBTAG_FILE_TYPE_SYMLINK: 1310 inode->i_data.a_ops = &udf_symlink_aops; 1311 inode->i_op = &udf_symlink_inode_operations; 1312 inode->i_mode = S_IFLNK | S_IRWXUGO; 1313 break; 1314 case ICBTAG_FILE_TYPE_MAIN: 1315 udf_debug("METADATA FILE-----\n"); 1316 break; 1317 case ICBTAG_FILE_TYPE_MIRROR: 1318 udf_debug("METADATA MIRROR FILE-----\n"); 1319 break; 1320 case ICBTAG_FILE_TYPE_BITMAP: 1321 udf_debug("METADATA BITMAP FILE-----\n"); 1322 break; 1323 default: 1324 printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown " 1325 "file type=%d\n", inode->i_ino, 1326 fe->icbTag.fileType); 1327 make_bad_inode(inode); 1328 return; 1329 } 1330 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 1331 struct deviceSpec *dsea = 1332 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); 1333 if (dsea) { 1334 init_special_inode(inode, inode->i_mode, 1335 MKDEV(le32_to_cpu(dsea->majorDeviceIdent), 1336 le32_to_cpu(dsea->minorDeviceIdent))); 1337 /* Developer ID ??? */ 1338 } else 1339 make_bad_inode(inode); 1340 } 1341 } 1342 1343 static int udf_alloc_i_data(struct inode *inode, size_t size) 1344 { 1345 struct udf_inode_info *iinfo = UDF_I(inode); 1346 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); 1347 1348 if (!iinfo->i_ext.i_data) { 1349 printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) " 1350 "no free memory\n", inode->i_ino); 1351 return -ENOMEM; 1352 } 1353 1354 return 0; 1355 } 1356 1357 static mode_t udf_convert_permissions(struct fileEntry *fe) 1358 { 1359 mode_t mode; 1360 uint32_t permissions; 1361 uint32_t flags; 1362 1363 permissions = le32_to_cpu(fe->permissions); 1364 flags = le16_to_cpu(fe->icbTag.flags); 1365 1366 mode = ((permissions) & S_IRWXO) | 1367 ((permissions >> 2) & S_IRWXG) | 1368 ((permissions >> 4) & S_IRWXU) | 1369 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | 1370 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | 1371 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); 1372 1373 return mode; 1374 } 1375 1376 int udf_write_inode(struct inode *inode, struct writeback_control *wbc) 1377 { 1378 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); 1379 } 1380 1381 static int udf_sync_inode(struct inode *inode) 1382 { 1383 return udf_update_inode(inode, 1); 1384 } 1385 1386 static int udf_update_inode(struct inode *inode, int do_sync) 1387 { 1388 struct buffer_head *bh = NULL; 1389 struct fileEntry *fe; 1390 struct extendedFileEntry *efe; 1391 uint32_t udfperms; 1392 uint16_t icbflags; 1393 uint16_t crclen; 1394 int err = 0; 1395 struct udf_sb_info *sbi = UDF_SB(inode->i_sb); 1396 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; 1397 struct udf_inode_info *iinfo = UDF_I(inode); 1398 1399 bh = udf_tgetblk(inode->i_sb, 1400 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0)); 1401 if (!bh) { 1402 udf_debug("getblk failure\n"); 1403 return -ENOMEM; 1404 } 1405 1406 lock_buffer(bh); 1407 memset(bh->b_data, 0, inode->i_sb->s_blocksize); 1408 fe = (struct fileEntry *)bh->b_data; 1409 efe = (struct extendedFileEntry *)bh->b_data; 1410 1411 if (iinfo->i_use) { 1412 struct unallocSpaceEntry *use = 1413 (struct unallocSpaceEntry *)bh->b_data; 1414 1415 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); 1416 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), 1417 iinfo->i_ext.i_data, inode->i_sb->s_blocksize - 1418 sizeof(struct unallocSpaceEntry)); 1419 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE); 1420 use->descTag.tagLocation = 1421 cpu_to_le32(iinfo->i_location.logicalBlockNum); 1422 crclen = sizeof(struct unallocSpaceEntry) + 1423 iinfo->i_lenAlloc - sizeof(struct tag); 1424 use->descTag.descCRCLength = cpu_to_le16(crclen); 1425 use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use + 1426 sizeof(struct tag), 1427 crclen)); 1428 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag); 1429 1430 goto out; 1431 } 1432 1433 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) 1434 fe->uid = cpu_to_le32(-1); 1435 else 1436 fe->uid = cpu_to_le32(inode->i_uid); 1437 1438 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) 1439 fe->gid = cpu_to_le32(-1); 1440 else 1441 fe->gid = cpu_to_le32(inode->i_gid); 1442 1443 udfperms = ((inode->i_mode & S_IRWXO)) | 1444 ((inode->i_mode & S_IRWXG) << 2) | 1445 ((inode->i_mode & S_IRWXU) << 4); 1446 1447 udfperms |= (le32_to_cpu(fe->permissions) & 1448 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | 1449 FE_PERM_G_DELETE | FE_PERM_G_CHATTR | 1450 FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); 1451 fe->permissions = cpu_to_le32(udfperms); 1452 1453 if (S_ISDIR(inode->i_mode)) 1454 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); 1455 else 1456 fe->fileLinkCount = cpu_to_le16(inode->i_nlink); 1457 1458 fe->informationLength = cpu_to_le64(inode->i_size); 1459 1460 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 1461 struct regid *eid; 1462 struct deviceSpec *dsea = 1463 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); 1464 if (!dsea) { 1465 dsea = (struct deviceSpec *) 1466 udf_add_extendedattr(inode, 1467 sizeof(struct deviceSpec) + 1468 sizeof(struct regid), 12, 0x3); 1469 dsea->attrType = cpu_to_le32(12); 1470 dsea->attrSubtype = 1; 1471 dsea->attrLength = cpu_to_le32( 1472 sizeof(struct deviceSpec) + 1473 sizeof(struct regid)); 1474 dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); 1475 } 1476 eid = (struct regid *)dsea->impUse; 1477 memset(eid, 0, sizeof(struct regid)); 1478 strcpy(eid->ident, UDF_ID_DEVELOPER); 1479 eid->identSuffix[0] = UDF_OS_CLASS_UNIX; 1480 eid->identSuffix[1] = UDF_OS_ID_LINUX; 1481 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); 1482 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); 1483 } 1484 1485 if (iinfo->i_efe == 0) { 1486 memcpy(bh->b_data + sizeof(struct fileEntry), 1487 iinfo->i_ext.i_data, 1488 inode->i_sb->s_blocksize - sizeof(struct fileEntry)); 1489 fe->logicalBlocksRecorded = cpu_to_le64( 1490 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> 1491 (blocksize_bits - 9)); 1492 1493 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); 1494 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); 1495 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); 1496 memset(&(fe->impIdent), 0, sizeof(struct regid)); 1497 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); 1498 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; 1499 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; 1500 fe->uniqueID = cpu_to_le64(iinfo->i_unique); 1501 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); 1502 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); 1503 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); 1504 crclen = sizeof(struct fileEntry); 1505 } else { 1506 memcpy(bh->b_data + sizeof(struct extendedFileEntry), 1507 iinfo->i_ext.i_data, 1508 inode->i_sb->s_blocksize - 1509 sizeof(struct extendedFileEntry)); 1510 efe->objectSize = cpu_to_le64(inode->i_size); 1511 efe->logicalBlocksRecorded = cpu_to_le64( 1512 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> 1513 (blocksize_bits - 9)); 1514 1515 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec || 1516 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec && 1517 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec)) 1518 iinfo->i_crtime = inode->i_atime; 1519 1520 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec || 1521 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec && 1522 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec)) 1523 iinfo->i_crtime = inode->i_mtime; 1524 1525 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec || 1526 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec && 1527 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec)) 1528 iinfo->i_crtime = inode->i_ctime; 1529 1530 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); 1531 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); 1532 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); 1533 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); 1534 1535 memset(&(efe->impIdent), 0, sizeof(struct regid)); 1536 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); 1537 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; 1538 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; 1539 efe->uniqueID = cpu_to_le64(iinfo->i_unique); 1540 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); 1541 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); 1542 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); 1543 crclen = sizeof(struct extendedFileEntry); 1544 } 1545 if (iinfo->i_strat4096) { 1546 fe->icbTag.strategyType = cpu_to_le16(4096); 1547 fe->icbTag.strategyParameter = cpu_to_le16(1); 1548 fe->icbTag.numEntries = cpu_to_le16(2); 1549 } else { 1550 fe->icbTag.strategyType = cpu_to_le16(4); 1551 fe->icbTag.numEntries = cpu_to_le16(1); 1552 } 1553 1554 if (S_ISDIR(inode->i_mode)) 1555 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; 1556 else if (S_ISREG(inode->i_mode)) 1557 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; 1558 else if (S_ISLNK(inode->i_mode)) 1559 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; 1560 else if (S_ISBLK(inode->i_mode)) 1561 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; 1562 else if (S_ISCHR(inode->i_mode)) 1563 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; 1564 else if (S_ISFIFO(inode->i_mode)) 1565 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; 1566 else if (S_ISSOCK(inode->i_mode)) 1567 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; 1568 1569 icbflags = iinfo->i_alloc_type | 1570 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | 1571 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | 1572 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | 1573 (le16_to_cpu(fe->icbTag.flags) & 1574 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | 1575 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); 1576 1577 fe->icbTag.flags = cpu_to_le16(icbflags); 1578 if (sbi->s_udfrev >= 0x0200) 1579 fe->descTag.descVersion = cpu_to_le16(3); 1580 else 1581 fe->descTag.descVersion = cpu_to_le16(2); 1582 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); 1583 fe->descTag.tagLocation = cpu_to_le32( 1584 iinfo->i_location.logicalBlockNum); 1585 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag); 1586 fe->descTag.descCRCLength = cpu_to_le16(crclen); 1587 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), 1588 crclen)); 1589 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); 1590 1591 out: 1592 set_buffer_uptodate(bh); 1593 unlock_buffer(bh); 1594 1595 /* write the data blocks */ 1596 mark_buffer_dirty(bh); 1597 if (do_sync) { 1598 sync_dirty_buffer(bh); 1599 if (buffer_write_io_error(bh)) { 1600 printk(KERN_WARNING "IO error syncing udf inode " 1601 "[%s:%08lx]\n", inode->i_sb->s_id, 1602 inode->i_ino); 1603 err = -EIO; 1604 } 1605 } 1606 brelse(bh); 1607 1608 return err; 1609 } 1610 1611 struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino) 1612 { 1613 unsigned long block = udf_get_lb_pblock(sb, ino, 0); 1614 struct inode *inode = iget_locked(sb, block); 1615 1616 if (!inode) 1617 return NULL; 1618 1619 if (inode->i_state & I_NEW) { 1620 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); 1621 __udf_read_inode(inode); 1622 unlock_new_inode(inode); 1623 } 1624 1625 if (is_bad_inode(inode)) 1626 goto out_iput; 1627 1628 if (ino->logicalBlockNum >= UDF_SB(sb)-> 1629 s_partmaps[ino->partitionReferenceNum].s_partition_len) { 1630 udf_debug("block=%d, partition=%d out of range\n", 1631 ino->logicalBlockNum, ino->partitionReferenceNum); 1632 make_bad_inode(inode); 1633 goto out_iput; 1634 } 1635 1636 return inode; 1637 1638 out_iput: 1639 iput(inode); 1640 return NULL; 1641 } 1642 1643 int8_t udf_add_aext(struct inode *inode, struct extent_position *epos, 1644 struct kernel_lb_addr *eloc, uint32_t elen, int inc) 1645 { 1646 int adsize; 1647 struct short_ad *sad = NULL; 1648 struct long_ad *lad = NULL; 1649 struct allocExtDesc *aed; 1650 int8_t etype; 1651 uint8_t *ptr; 1652 struct udf_inode_info *iinfo = UDF_I(inode); 1653 1654 if (!epos->bh) 1655 ptr = iinfo->i_ext.i_data + epos->offset - 1656 udf_file_entry_alloc_offset(inode) + 1657 iinfo->i_lenEAttr; 1658 else 1659 ptr = epos->bh->b_data + epos->offset; 1660 1661 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 1662 adsize = sizeof(struct short_ad); 1663 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 1664 adsize = sizeof(struct long_ad); 1665 else 1666 return -1; 1667 1668 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { 1669 unsigned char *sptr, *dptr; 1670 struct buffer_head *nbh; 1671 int err, loffset; 1672 struct kernel_lb_addr obloc = epos->block; 1673 1674 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, 1675 obloc.partitionReferenceNum, 1676 obloc.logicalBlockNum, &err); 1677 if (!epos->block.logicalBlockNum) 1678 return -1; 1679 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, 1680 &epos->block, 1681 0)); 1682 if (!nbh) 1683 return -1; 1684 lock_buffer(nbh); 1685 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); 1686 set_buffer_uptodate(nbh); 1687 unlock_buffer(nbh); 1688 mark_buffer_dirty_inode(nbh, inode); 1689 1690 aed = (struct allocExtDesc *)(nbh->b_data); 1691 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) 1692 aed->previousAllocExtLocation = 1693 cpu_to_le32(obloc.logicalBlockNum); 1694 if (epos->offset + adsize > inode->i_sb->s_blocksize) { 1695 loffset = epos->offset; 1696 aed->lengthAllocDescs = cpu_to_le32(adsize); 1697 sptr = ptr - adsize; 1698 dptr = nbh->b_data + sizeof(struct allocExtDesc); 1699 memcpy(dptr, sptr, adsize); 1700 epos->offset = sizeof(struct allocExtDesc) + adsize; 1701 } else { 1702 loffset = epos->offset + adsize; 1703 aed->lengthAllocDescs = cpu_to_le32(0); 1704 sptr = ptr; 1705 epos->offset = sizeof(struct allocExtDesc); 1706 1707 if (epos->bh) { 1708 aed = (struct allocExtDesc *)epos->bh->b_data; 1709 le32_add_cpu(&aed->lengthAllocDescs, adsize); 1710 } else { 1711 iinfo->i_lenAlloc += adsize; 1712 mark_inode_dirty(inode); 1713 } 1714 } 1715 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200) 1716 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, 1717 epos->block.logicalBlockNum, sizeof(struct tag)); 1718 else 1719 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, 1720 epos->block.logicalBlockNum, sizeof(struct tag)); 1721 switch (iinfo->i_alloc_type) { 1722 case ICBTAG_FLAG_AD_SHORT: 1723 sad = (struct short_ad *)sptr; 1724 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | 1725 inode->i_sb->s_blocksize); 1726 sad->extPosition = 1727 cpu_to_le32(epos->block.logicalBlockNum); 1728 break; 1729 case ICBTAG_FLAG_AD_LONG: 1730 lad = (struct long_ad *)sptr; 1731 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | 1732 inode->i_sb->s_blocksize); 1733 lad->extLocation = cpu_to_lelb(epos->block); 1734 memset(lad->impUse, 0x00, sizeof(lad->impUse)); 1735 break; 1736 } 1737 if (epos->bh) { 1738 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || 1739 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) 1740 udf_update_tag(epos->bh->b_data, loffset); 1741 else 1742 udf_update_tag(epos->bh->b_data, 1743 sizeof(struct allocExtDesc)); 1744 mark_buffer_dirty_inode(epos->bh, inode); 1745 brelse(epos->bh); 1746 } else { 1747 mark_inode_dirty(inode); 1748 } 1749 epos->bh = nbh; 1750 } 1751 1752 etype = udf_write_aext(inode, epos, eloc, elen, inc); 1753 1754 if (!epos->bh) { 1755 iinfo->i_lenAlloc += adsize; 1756 mark_inode_dirty(inode); 1757 } else { 1758 aed = (struct allocExtDesc *)epos->bh->b_data; 1759 le32_add_cpu(&aed->lengthAllocDescs, adsize); 1760 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || 1761 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) 1762 udf_update_tag(epos->bh->b_data, 1763 epos->offset + (inc ? 0 : adsize)); 1764 else 1765 udf_update_tag(epos->bh->b_data, 1766 sizeof(struct allocExtDesc)); 1767 mark_buffer_dirty_inode(epos->bh, inode); 1768 } 1769 1770 return etype; 1771 } 1772 1773 int8_t udf_write_aext(struct inode *inode, struct extent_position *epos, 1774 struct kernel_lb_addr *eloc, uint32_t elen, int inc) 1775 { 1776 int adsize; 1777 uint8_t *ptr; 1778 struct short_ad *sad; 1779 struct long_ad *lad; 1780 struct udf_inode_info *iinfo = UDF_I(inode); 1781 1782 if (!epos->bh) 1783 ptr = iinfo->i_ext.i_data + epos->offset - 1784 udf_file_entry_alloc_offset(inode) + 1785 iinfo->i_lenEAttr; 1786 else 1787 ptr = epos->bh->b_data + epos->offset; 1788 1789 switch (iinfo->i_alloc_type) { 1790 case ICBTAG_FLAG_AD_SHORT: 1791 sad = (struct short_ad *)ptr; 1792 sad->extLength = cpu_to_le32(elen); 1793 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); 1794 adsize = sizeof(struct short_ad); 1795 break; 1796 case ICBTAG_FLAG_AD_LONG: 1797 lad = (struct long_ad *)ptr; 1798 lad->extLength = cpu_to_le32(elen); 1799 lad->extLocation = cpu_to_lelb(*eloc); 1800 memset(lad->impUse, 0x00, sizeof(lad->impUse)); 1801 adsize = sizeof(struct long_ad); 1802 break; 1803 default: 1804 return -1; 1805 } 1806 1807 if (epos->bh) { 1808 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || 1809 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { 1810 struct allocExtDesc *aed = 1811 (struct allocExtDesc *)epos->bh->b_data; 1812 udf_update_tag(epos->bh->b_data, 1813 le32_to_cpu(aed->lengthAllocDescs) + 1814 sizeof(struct allocExtDesc)); 1815 } 1816 mark_buffer_dirty_inode(epos->bh, inode); 1817 } else { 1818 mark_inode_dirty(inode); 1819 } 1820 1821 if (inc) 1822 epos->offset += adsize; 1823 1824 return (elen >> 30); 1825 } 1826 1827 int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, 1828 struct kernel_lb_addr *eloc, uint32_t *elen, int inc) 1829 { 1830 int8_t etype; 1831 1832 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == 1833 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { 1834 int block; 1835 epos->block = *eloc; 1836 epos->offset = sizeof(struct allocExtDesc); 1837 brelse(epos->bh); 1838 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); 1839 epos->bh = udf_tread(inode->i_sb, block); 1840 if (!epos->bh) { 1841 udf_debug("reading block %d failed!\n", block); 1842 return -1; 1843 } 1844 } 1845 1846 return etype; 1847 } 1848 1849 int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, 1850 struct kernel_lb_addr *eloc, uint32_t *elen, int inc) 1851 { 1852 int alen; 1853 int8_t etype; 1854 uint8_t *ptr; 1855 struct short_ad *sad; 1856 struct long_ad *lad; 1857 struct udf_inode_info *iinfo = UDF_I(inode); 1858 1859 if (!epos->bh) { 1860 if (!epos->offset) 1861 epos->offset = udf_file_entry_alloc_offset(inode); 1862 ptr = iinfo->i_ext.i_data + epos->offset - 1863 udf_file_entry_alloc_offset(inode) + 1864 iinfo->i_lenEAttr; 1865 alen = udf_file_entry_alloc_offset(inode) + 1866 iinfo->i_lenAlloc; 1867 } else { 1868 if (!epos->offset) 1869 epos->offset = sizeof(struct allocExtDesc); 1870 ptr = epos->bh->b_data + epos->offset; 1871 alen = sizeof(struct allocExtDesc) + 1872 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> 1873 lengthAllocDescs); 1874 } 1875 1876 switch (iinfo->i_alloc_type) { 1877 case ICBTAG_FLAG_AD_SHORT: 1878 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); 1879 if (!sad) 1880 return -1; 1881 etype = le32_to_cpu(sad->extLength) >> 30; 1882 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); 1883 eloc->partitionReferenceNum = 1884 iinfo->i_location.partitionReferenceNum; 1885 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; 1886 break; 1887 case ICBTAG_FLAG_AD_LONG: 1888 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); 1889 if (!lad) 1890 return -1; 1891 etype = le32_to_cpu(lad->extLength) >> 30; 1892 *eloc = lelb_to_cpu(lad->extLocation); 1893 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; 1894 break; 1895 default: 1896 udf_debug("alloc_type = %d unsupported\n", 1897 iinfo->i_alloc_type); 1898 return -1; 1899 } 1900 1901 return etype; 1902 } 1903 1904 static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, 1905 struct kernel_lb_addr neloc, uint32_t nelen) 1906 { 1907 struct kernel_lb_addr oeloc; 1908 uint32_t oelen; 1909 int8_t etype; 1910 1911 if (epos.bh) 1912 get_bh(epos.bh); 1913 1914 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { 1915 udf_write_aext(inode, &epos, &neloc, nelen, 1); 1916 neloc = oeloc; 1917 nelen = (etype << 30) | oelen; 1918 } 1919 udf_add_aext(inode, &epos, &neloc, nelen, 1); 1920 brelse(epos.bh); 1921 1922 return (nelen >> 30); 1923 } 1924 1925 int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, 1926 struct kernel_lb_addr eloc, uint32_t elen) 1927 { 1928 struct extent_position oepos; 1929 int adsize; 1930 int8_t etype; 1931 struct allocExtDesc *aed; 1932 struct udf_inode_info *iinfo; 1933 1934 if (epos.bh) { 1935 get_bh(epos.bh); 1936 get_bh(epos.bh); 1937 } 1938 1939 iinfo = UDF_I(inode); 1940 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 1941 adsize = sizeof(struct short_ad); 1942 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 1943 adsize = sizeof(struct long_ad); 1944 else 1945 adsize = 0; 1946 1947 oepos = epos; 1948 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) 1949 return -1; 1950 1951 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { 1952 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); 1953 if (oepos.bh != epos.bh) { 1954 oepos.block = epos.block; 1955 brelse(oepos.bh); 1956 get_bh(epos.bh); 1957 oepos.bh = epos.bh; 1958 oepos.offset = epos.offset - adsize; 1959 } 1960 } 1961 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); 1962 elen = 0; 1963 1964 if (epos.bh != oepos.bh) { 1965 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); 1966 udf_write_aext(inode, &oepos, &eloc, elen, 1); 1967 udf_write_aext(inode, &oepos, &eloc, elen, 1); 1968 if (!oepos.bh) { 1969 iinfo->i_lenAlloc -= (adsize * 2); 1970 mark_inode_dirty(inode); 1971 } else { 1972 aed = (struct allocExtDesc *)oepos.bh->b_data; 1973 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); 1974 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || 1975 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) 1976 udf_update_tag(oepos.bh->b_data, 1977 oepos.offset - (2 * adsize)); 1978 else 1979 udf_update_tag(oepos.bh->b_data, 1980 sizeof(struct allocExtDesc)); 1981 mark_buffer_dirty_inode(oepos.bh, inode); 1982 } 1983 } else { 1984 udf_write_aext(inode, &oepos, &eloc, elen, 1); 1985 if (!oepos.bh) { 1986 iinfo->i_lenAlloc -= adsize; 1987 mark_inode_dirty(inode); 1988 } else { 1989 aed = (struct allocExtDesc *)oepos.bh->b_data; 1990 le32_add_cpu(&aed->lengthAllocDescs, -adsize); 1991 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || 1992 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) 1993 udf_update_tag(oepos.bh->b_data, 1994 epos.offset - adsize); 1995 else 1996 udf_update_tag(oepos.bh->b_data, 1997 sizeof(struct allocExtDesc)); 1998 mark_buffer_dirty_inode(oepos.bh, inode); 1999 } 2000 } 2001 2002 brelse(epos.bh); 2003 brelse(oepos.bh); 2004 2005 return (elen >> 30); 2006 } 2007 2008 int8_t inode_bmap(struct inode *inode, sector_t block, 2009 struct extent_position *pos, struct kernel_lb_addr *eloc, 2010 uint32_t *elen, sector_t *offset) 2011 { 2012 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; 2013 loff_t lbcount = 0, bcount = 2014 (loff_t) block << blocksize_bits; 2015 int8_t etype; 2016 struct udf_inode_info *iinfo; 2017 2018 iinfo = UDF_I(inode); 2019 pos->offset = 0; 2020 pos->block = iinfo->i_location; 2021 pos->bh = NULL; 2022 *elen = 0; 2023 2024 do { 2025 etype = udf_next_aext(inode, pos, eloc, elen, 1); 2026 if (etype == -1) { 2027 *offset = (bcount - lbcount) >> blocksize_bits; 2028 iinfo->i_lenExtents = lbcount; 2029 return -1; 2030 } 2031 lbcount += *elen; 2032 } while (lbcount <= bcount); 2033 2034 *offset = (bcount + *elen - lbcount) >> blocksize_bits; 2035 2036 return etype; 2037 } 2038 2039 long udf_block_map(struct inode *inode, sector_t block) 2040 { 2041 struct kernel_lb_addr eloc; 2042 uint32_t elen; 2043 sector_t offset; 2044 struct extent_position epos = {}; 2045 int ret; 2046 2047 down_read(&UDF_I(inode)->i_data_sem); 2048 2049 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == 2050 (EXT_RECORDED_ALLOCATED >> 30)) 2051 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset); 2052 else 2053 ret = 0; 2054 2055 up_read(&UDF_I(inode)->i_data_sem); 2056 brelse(epos.bh); 2057 2058 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) 2059 return udf_fixed_to_variable(ret); 2060 else 2061 return ret; 2062 } 2063