inode.c revision c87e8e90d0da1134e42c89dc89559f4bfe282ef9
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 41#include "udf_i.h" 42#include "udf_sb.h" 43 44MODULE_AUTHOR("Ben Fennema"); 45MODULE_DESCRIPTION("Universal Disk Format Filesystem"); 46MODULE_LICENSE("GPL"); 47 48#define EXTENT_MERGE_SIZE 5 49 50static mode_t udf_convert_permissions(struct fileEntry *); 51static int udf_update_inode(struct inode *, int); 52static void udf_fill_inode(struct inode *, struct buffer_head *); 53static int udf_alloc_i_data(struct inode *inode, size_t size); 54static struct buffer_head *inode_getblk(struct inode *, sector_t, int *, 55 sector_t *, int *); 56static int8_t udf_insert_aext(struct inode *, struct extent_position, 57 kernel_lb_addr, uint32_t); 58static void udf_split_extents(struct inode *, int *, int, int, 59 kernel_long_ad[EXTENT_MERGE_SIZE], int *); 60static void udf_prealloc_extents(struct inode *, int, int, 61 kernel_long_ad[EXTENT_MERGE_SIZE], int *); 62static void udf_merge_extents(struct inode *, 63 kernel_long_ad[EXTENT_MERGE_SIZE], int *); 64static void udf_update_extents(struct inode *, 65 kernel_long_ad[EXTENT_MERGE_SIZE], int, int, 66 struct extent_position *); 67static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); 68 69 70void udf_delete_inode(struct inode *inode) 71{ 72 truncate_inode_pages(&inode->i_data, 0); 73 74 if (is_bad_inode(inode)) 75 goto no_delete; 76 77 inode->i_size = 0; 78 udf_truncate(inode); 79 lock_kernel(); 80 81 udf_update_inode(inode, IS_SYNC(inode)); 82 udf_free_inode(inode); 83 84 unlock_kernel(); 85 return; 86 87no_delete: 88 clear_inode(inode); 89} 90 91/* 92 * If we are going to release inode from memory, we discard preallocation and 93 * truncate last inode extent to proper length. We could use drop_inode() but 94 * it's called under inode_lock and thus we cannot mark inode dirty there. We 95 * use clear_inode() but we have to make sure to write inode as it's not written 96 * automatically. 97 */ 98void udf_clear_inode(struct inode *inode) 99{ 100 struct udf_inode_info *iinfo; 101 if (!(inode->i_sb->s_flags & MS_RDONLY)) { 102 lock_kernel(); 103 /* Discard preallocation for directories, symlinks, etc. */ 104 udf_discard_prealloc(inode); 105 udf_truncate_tail_extent(inode); 106 unlock_kernel(); 107 write_inode_now(inode, 0); 108 } 109 iinfo = UDF_I(inode); 110 kfree(iinfo->i_ext.i_data); 111 iinfo->i_ext.i_data = NULL; 112} 113 114static int udf_writepage(struct page *page, struct writeback_control *wbc) 115{ 116 return block_write_full_page(page, udf_get_block, wbc); 117} 118 119static int udf_readpage(struct file *file, struct page *page) 120{ 121 return block_read_full_page(page, udf_get_block); 122} 123 124static int udf_write_begin(struct file *file, struct address_space *mapping, 125 loff_t pos, unsigned len, unsigned flags, 126 struct page **pagep, void **fsdata) 127{ 128 *pagep = NULL; 129 return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, 130 udf_get_block); 131} 132 133static sector_t udf_bmap(struct address_space *mapping, sector_t block) 134{ 135 return generic_block_bmap(mapping, block, udf_get_block); 136} 137 138const struct address_space_operations udf_aops = { 139 .readpage = udf_readpage, 140 .writepage = udf_writepage, 141 .sync_page = block_sync_page, 142 .write_begin = udf_write_begin, 143 .write_end = generic_write_end, 144 .bmap = udf_bmap, 145}; 146 147void udf_expand_file_adinicb(struct inode *inode, int newsize, int *err) 148{ 149 struct page *page; 150 char *kaddr; 151 struct udf_inode_info *iinfo = UDF_I(inode); 152 struct writeback_control udf_wbc = { 153 .sync_mode = WB_SYNC_NONE, 154 .nr_to_write = 1, 155 }; 156 157 /* from now on we have normal address_space methods */ 158 inode->i_data.a_ops = &udf_aops; 159 160 if (!iinfo->i_lenAlloc) { 161 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 162 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; 163 else 164 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; 165 mark_inode_dirty(inode); 166 return; 167 } 168 169 page = grab_cache_page(inode->i_mapping, 0); 170 BUG_ON(!PageLocked(page)); 171 172 if (!PageUptodate(page)) { 173 kaddr = kmap(page); 174 memset(kaddr + iinfo->i_lenAlloc, 0x00, 175 PAGE_CACHE_SIZE - iinfo->i_lenAlloc); 176 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, 177 iinfo->i_lenAlloc); 178 flush_dcache_page(page); 179 SetPageUptodate(page); 180 kunmap(page); 181 } 182 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, 183 iinfo->i_lenAlloc); 184 iinfo->i_lenAlloc = 0; 185 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 186 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; 187 else 188 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; 189 190 inode->i_data.a_ops->writepage(page, &udf_wbc); 191 page_cache_release(page); 192 193 mark_inode_dirty(inode); 194} 195 196struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, 197 int *err) 198{ 199 int newblock; 200 struct buffer_head *dbh = NULL; 201 kernel_lb_addr eloc; 202 uint32_t elen; 203 uint8_t alloctype; 204 struct extent_position epos; 205 206 struct udf_fileident_bh sfibh, dfibh; 207 loff_t f_pos = udf_ext0_offset(inode); 208 int size = udf_ext0_offset(inode) + inode->i_size; 209 struct fileIdentDesc cfi, *sfi, *dfi; 210 struct udf_inode_info *iinfo = UDF_I(inode); 211 212 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 213 alloctype = ICBTAG_FLAG_AD_SHORT; 214 else 215 alloctype = ICBTAG_FLAG_AD_LONG; 216 217 if (!inode->i_size) { 218 iinfo->i_alloc_type = alloctype; 219 mark_inode_dirty(inode); 220 return NULL; 221 } 222 223 /* alloc block, and copy data to it */ 224 *block = udf_new_block(inode->i_sb, inode, 225 iinfo->i_location.partitionReferenceNum, 226 iinfo->i_location.logicalBlockNum, err); 227 if (!(*block)) 228 return NULL; 229 newblock = udf_get_pblock(inode->i_sb, *block, 230 iinfo->i_location.partitionReferenceNum, 231 0); 232 if (!newblock) 233 return NULL; 234 dbh = udf_tgetblk(inode->i_sb, newblock); 235 if (!dbh) 236 return NULL; 237 lock_buffer(dbh); 238 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); 239 set_buffer_uptodate(dbh); 240 unlock_buffer(dbh); 241 mark_buffer_dirty_inode(dbh, inode); 242 243 sfibh.soffset = sfibh.eoffset = 244 f_pos & (inode->i_sb->s_blocksize - 1); 245 sfibh.sbh = sfibh.ebh = NULL; 246 dfibh.soffset = dfibh.eoffset = 0; 247 dfibh.sbh = dfibh.ebh = dbh; 248 while (f_pos < size) { 249 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; 250 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, 251 NULL, NULL, NULL); 252 if (!sfi) { 253 brelse(dbh); 254 return NULL; 255 } 256 iinfo->i_alloc_type = alloctype; 257 sfi->descTag.tagLocation = cpu_to_le32(*block); 258 dfibh.soffset = dfibh.eoffset; 259 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); 260 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); 261 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, 262 sfi->fileIdent + 263 le16_to_cpu(sfi->lengthOfImpUse))) { 264 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; 265 brelse(dbh); 266 return NULL; 267 } 268 } 269 mark_buffer_dirty_inode(dbh, inode); 270 271 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, 272 iinfo->i_lenAlloc); 273 iinfo->i_lenAlloc = 0; 274 eloc.logicalBlockNum = *block; 275 eloc.partitionReferenceNum = 276 iinfo->i_location.partitionReferenceNum; 277 elen = inode->i_sb->s_blocksize; 278 iinfo->i_lenExtents = elen; 279 epos.bh = NULL; 280 epos.block = iinfo->i_location; 281 epos.offset = udf_file_entry_alloc_offset(inode); 282 udf_add_aext(inode, &epos, eloc, elen, 0); 283 /* UniqueID stuff */ 284 285 brelse(epos.bh); 286 mark_inode_dirty(inode); 287 return dbh; 288} 289 290static int udf_get_block(struct inode *inode, sector_t block, 291 struct buffer_head *bh_result, int create) 292{ 293 int err, new; 294 struct buffer_head *bh; 295 sector_t phys = 0; 296 struct udf_inode_info *iinfo; 297 298 if (!create) { 299 phys = udf_block_map(inode, block); 300 if (phys) 301 map_bh(bh_result, inode->i_sb, phys); 302 return 0; 303 } 304 305 err = -EIO; 306 new = 0; 307 bh = NULL; 308 309 lock_kernel(); 310 311 iinfo = UDF_I(inode); 312 if (block == iinfo->i_next_alloc_block + 1) { 313 iinfo->i_next_alloc_block++; 314 iinfo->i_next_alloc_goal++; 315 } 316 317 err = 0; 318 319 bh = inode_getblk(inode, block, &err, &phys, &new); 320 BUG_ON(bh); 321 if (err) 322 goto abort; 323 BUG_ON(!phys); 324 325 if (new) 326 set_buffer_new(bh_result); 327 map_bh(bh_result, inode->i_sb, phys); 328 329abort: 330 unlock_kernel(); 331 return err; 332} 333 334static struct buffer_head *udf_getblk(struct inode *inode, long block, 335 int create, int *err) 336{ 337 struct buffer_head *bh; 338 struct buffer_head dummy; 339 340 dummy.b_state = 0; 341 dummy.b_blocknr = -1000; 342 *err = udf_get_block(inode, block, &dummy, create); 343 if (!*err && buffer_mapped(&dummy)) { 344 bh = sb_getblk(inode->i_sb, dummy.b_blocknr); 345 if (buffer_new(&dummy)) { 346 lock_buffer(bh); 347 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); 348 set_buffer_uptodate(bh); 349 unlock_buffer(bh); 350 mark_buffer_dirty_inode(bh, inode); 351 } 352 return bh; 353 } 354 355 return NULL; 356} 357 358/* Extend the file by 'blocks' blocks, return the number of extents added */ 359int udf_extend_file(struct inode *inode, struct extent_position *last_pos, 360 kernel_long_ad *last_ext, sector_t blocks) 361{ 362 sector_t add; 363 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); 364 struct super_block *sb = inode->i_sb; 365 kernel_lb_addr prealloc_loc = {}; 366 int prealloc_len = 0; 367 struct udf_inode_info *iinfo; 368 369 /* The previous extent is fake and we should not extend by anything 370 * - there's nothing to do... */ 371 if (!blocks && fake) 372 return 0; 373 374 iinfo = UDF_I(inode); 375 /* Round the last extent up to a multiple of block size */ 376 if (last_ext->extLength & (sb->s_blocksize - 1)) { 377 last_ext->extLength = 378 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | 379 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + 380 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); 381 iinfo->i_lenExtents = 382 (iinfo->i_lenExtents + sb->s_blocksize - 1) & 383 ~(sb->s_blocksize - 1); 384 } 385 386 /* Last extent are just preallocated blocks? */ 387 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == 388 EXT_NOT_RECORDED_ALLOCATED) { 389 /* Save the extent so that we can reattach it to the end */ 390 prealloc_loc = last_ext->extLocation; 391 prealloc_len = last_ext->extLength; 392 /* Mark the extent as a hole */ 393 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | 394 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); 395 last_ext->extLocation.logicalBlockNum = 0; 396 last_ext->extLocation.partitionReferenceNum = 0; 397 } 398 399 /* Can we merge with the previous extent? */ 400 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == 401 EXT_NOT_RECORDED_NOT_ALLOCATED) { 402 add = ((1 << 30) - sb->s_blocksize - 403 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> 404 sb->s_blocksize_bits; 405 if (add > blocks) 406 add = blocks; 407 blocks -= add; 408 last_ext->extLength += add << sb->s_blocksize_bits; 409 } 410 411 if (fake) { 412 udf_add_aext(inode, last_pos, last_ext->extLocation, 413 last_ext->extLength, 1); 414 count++; 415 } else 416 udf_write_aext(inode, last_pos, last_ext->extLocation, 417 last_ext->extLength, 1); 418 419 /* Managed to do everything necessary? */ 420 if (!blocks) 421 goto out; 422 423 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ 424 last_ext->extLocation.logicalBlockNum = 0; 425 last_ext->extLocation.partitionReferenceNum = 0; 426 add = (1 << (30-sb->s_blocksize_bits)) - 1; 427 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | 428 (add << sb->s_blocksize_bits); 429 430 /* Create enough extents to cover the whole hole */ 431 while (blocks > add) { 432 blocks -= add; 433 if (udf_add_aext(inode, last_pos, last_ext->extLocation, 434 last_ext->extLength, 1) == -1) 435 return -1; 436 count++; 437 } 438 if (blocks) { 439 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | 440 (blocks << sb->s_blocksize_bits); 441 if (udf_add_aext(inode, last_pos, last_ext->extLocation, 442 last_ext->extLength, 1) == -1) 443 return -1; 444 count++; 445 } 446 447out: 448 /* Do we have some preallocated blocks saved? */ 449 if (prealloc_len) { 450 if (udf_add_aext(inode, last_pos, prealloc_loc, 451 prealloc_len, 1) == -1) 452 return -1; 453 last_ext->extLocation = prealloc_loc; 454 last_ext->extLength = prealloc_len; 455 count++; 456 } 457 458 /* last_pos should point to the last written extent... */ 459 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 460 last_pos->offset -= sizeof(short_ad); 461 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 462 last_pos->offset -= sizeof(long_ad); 463 else 464 return -1; 465 466 return count; 467} 468 469static struct buffer_head *inode_getblk(struct inode *inode, sector_t block, 470 int *err, sector_t *phys, int *new) 471{ 472 static sector_t last_block; 473 struct buffer_head *result = NULL; 474 kernel_long_ad laarr[EXTENT_MERGE_SIZE]; 475 struct extent_position prev_epos, cur_epos, next_epos; 476 int count = 0, startnum = 0, endnum = 0; 477 uint32_t elen = 0, tmpelen; 478 kernel_lb_addr eloc, tmpeloc; 479 int c = 1; 480 loff_t lbcount = 0, b_off = 0; 481 uint32_t newblocknum, newblock; 482 sector_t offset = 0; 483 int8_t etype; 484 struct udf_inode_info *iinfo = UDF_I(inode); 485 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; 486 int lastblock = 0; 487 488 prev_epos.offset = udf_file_entry_alloc_offset(inode); 489 prev_epos.block = iinfo->i_location; 490 prev_epos.bh = NULL; 491 cur_epos = next_epos = prev_epos; 492 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; 493 494 /* find the extent which contains the block we are looking for. 495 alternate between laarr[0] and laarr[1] for locations of the 496 current extent, and the previous extent */ 497 do { 498 if (prev_epos.bh != cur_epos.bh) { 499 brelse(prev_epos.bh); 500 get_bh(cur_epos.bh); 501 prev_epos.bh = cur_epos.bh; 502 } 503 if (cur_epos.bh != next_epos.bh) { 504 brelse(cur_epos.bh); 505 get_bh(next_epos.bh); 506 cur_epos.bh = next_epos.bh; 507 } 508 509 lbcount += elen; 510 511 prev_epos.block = cur_epos.block; 512 cur_epos.block = next_epos.block; 513 514 prev_epos.offset = cur_epos.offset; 515 cur_epos.offset = next_epos.offset; 516 517 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); 518 if (etype == -1) 519 break; 520 521 c = !c; 522 523 laarr[c].extLength = (etype << 30) | elen; 524 laarr[c].extLocation = eloc; 525 526 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) 527 pgoal = eloc.logicalBlockNum + 528 ((elen + inode->i_sb->s_blocksize - 1) >> 529 inode->i_sb->s_blocksize_bits); 530 531 count++; 532 } while (lbcount + elen <= b_off); 533 534 b_off -= lbcount; 535 offset = b_off >> inode->i_sb->s_blocksize_bits; 536 /* 537 * Move prev_epos and cur_epos into indirect extent if we are at 538 * the pointer to it 539 */ 540 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); 541 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); 542 543 /* if the extent is allocated and recorded, return the block 544 if the extent is not a multiple of the blocksize, round up */ 545 546 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { 547 if (elen & (inode->i_sb->s_blocksize - 1)) { 548 elen = EXT_RECORDED_ALLOCATED | 549 ((elen + inode->i_sb->s_blocksize - 1) & 550 ~(inode->i_sb->s_blocksize - 1)); 551 etype = udf_write_aext(inode, &cur_epos, eloc, elen, 1); 552 } 553 brelse(prev_epos.bh); 554 brelse(cur_epos.bh); 555 brelse(next_epos.bh); 556 newblock = udf_get_lb_pblock(inode->i_sb, eloc, offset); 557 *phys = newblock; 558 return NULL; 559 } 560 561 last_block = block; 562 /* Are we beyond EOF? */ 563 if (etype == -1) { 564 int ret; 565 566 if (count) { 567 if (c) 568 laarr[0] = laarr[1]; 569 startnum = 1; 570 } else { 571 /* Create a fake extent when there's not one */ 572 memset(&laarr[0].extLocation, 0x00, 573 sizeof(kernel_lb_addr)); 574 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; 575 /* Will udf_extend_file() create real extent from 576 a fake one? */ 577 startnum = (offset > 0); 578 } 579 /* Create extents for the hole between EOF and offset */ 580 ret = udf_extend_file(inode, &prev_epos, laarr, offset); 581 if (ret == -1) { 582 brelse(prev_epos.bh); 583 brelse(cur_epos.bh); 584 brelse(next_epos.bh); 585 /* We don't really know the error here so we just make 586 * something up */ 587 *err = -ENOSPC; 588 return NULL; 589 } 590 c = 0; 591 offset = 0; 592 count += ret; 593 /* We are not covered by a preallocated extent? */ 594 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != 595 EXT_NOT_RECORDED_ALLOCATED) { 596 /* Is there any real extent? - otherwise we overwrite 597 * the fake one... */ 598 if (count) 599 c = !c; 600 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | 601 inode->i_sb->s_blocksize; 602 memset(&laarr[c].extLocation, 0x00, 603 sizeof(kernel_lb_addr)); 604 count++; 605 endnum++; 606 } 607 endnum = c + 1; 608 lastblock = 1; 609 } else { 610 endnum = startnum = ((count > 2) ? 2 : count); 611 612 /* if the current extent is in position 0, 613 swap it with the previous */ 614 if (!c && count != 1) { 615 laarr[2] = laarr[0]; 616 laarr[0] = laarr[1]; 617 laarr[1] = laarr[2]; 618 c = 1; 619 } 620 621 /* if the current block is located in an extent, 622 read the next extent */ 623 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); 624 if (etype != -1) { 625 laarr[c + 1].extLength = (etype << 30) | elen; 626 laarr[c + 1].extLocation = eloc; 627 count++; 628 startnum++; 629 endnum++; 630 } else 631 lastblock = 1; 632 } 633 634 /* if the current extent is not recorded but allocated, get the 635 * block in the extent corresponding to the requested block */ 636 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) 637 newblocknum = laarr[c].extLocation.logicalBlockNum + offset; 638 else { /* otherwise, allocate a new block */ 639 if (iinfo->i_next_alloc_block == block) 640 goal = iinfo->i_next_alloc_goal; 641 642 if (!goal) { 643 if (!(goal = pgoal)) /* XXX: what was intended here? */ 644 goal = iinfo->i_location.logicalBlockNum + 1; 645 } 646 647 newblocknum = udf_new_block(inode->i_sb, inode, 648 iinfo->i_location.partitionReferenceNum, 649 goal, err); 650 if (!newblocknum) { 651 brelse(prev_epos.bh); 652 *err = -ENOSPC; 653 return NULL; 654 } 655 iinfo->i_lenExtents += inode->i_sb->s_blocksize; 656 } 657 658 /* if the extent the requsted block is located in contains multiple 659 * blocks, split the extent into at most three extents. blocks prior 660 * to requested block, requested block, and blocks after requested 661 * block */ 662 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); 663 664#ifdef UDF_PREALLOCATE 665 /* preallocate blocks */ 666 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); 667#endif 668 669 /* merge any continuous blocks in laarr */ 670 udf_merge_extents(inode, laarr, &endnum); 671 672 /* write back the new extents, inserting new extents if the new number 673 * of extents is greater than the old number, and deleting extents if 674 * the new number of extents is less than the old number */ 675 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); 676 677 brelse(prev_epos.bh); 678 679 newblock = udf_get_pblock(inode->i_sb, newblocknum, 680 iinfo->i_location.partitionReferenceNum, 0); 681 if (!newblock) 682 return NULL; 683 *phys = newblock; 684 *err = 0; 685 *new = 1; 686 iinfo->i_next_alloc_block = block; 687 iinfo->i_next_alloc_goal = newblocknum; 688 inode->i_ctime = current_fs_time(inode->i_sb); 689 690 if (IS_SYNC(inode)) 691 udf_sync_inode(inode); 692 else 693 mark_inode_dirty(inode); 694 695 return result; 696} 697 698static void udf_split_extents(struct inode *inode, int *c, int offset, 699 int newblocknum, 700 kernel_long_ad laarr[EXTENT_MERGE_SIZE], 701 int *endnum) 702{ 703 unsigned long blocksize = inode->i_sb->s_blocksize; 704 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; 705 706 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || 707 (laarr[*c].extLength >> 30) == 708 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { 709 int curr = *c; 710 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + 711 blocksize - 1) >> blocksize_bits; 712 int8_t etype = (laarr[curr].extLength >> 30); 713 714 if (blen == 1) 715 ; 716 else if (!offset || blen == offset + 1) { 717 laarr[curr + 2] = laarr[curr + 1]; 718 laarr[curr + 1] = laarr[curr]; 719 } else { 720 laarr[curr + 3] = laarr[curr + 1]; 721 laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; 722 } 723 724 if (offset) { 725 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { 726 udf_free_blocks(inode->i_sb, inode, 727 laarr[curr].extLocation, 728 0, offset); 729 laarr[curr].extLength = 730 EXT_NOT_RECORDED_NOT_ALLOCATED | 731 (offset << blocksize_bits); 732 laarr[curr].extLocation.logicalBlockNum = 0; 733 laarr[curr].extLocation. 734 partitionReferenceNum = 0; 735 } else 736 laarr[curr].extLength = (etype << 30) | 737 (offset << blocksize_bits); 738 curr++; 739 (*c)++; 740 (*endnum)++; 741 } 742 743 laarr[curr].extLocation.logicalBlockNum = newblocknum; 744 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) 745 laarr[curr].extLocation.partitionReferenceNum = 746 UDF_I(inode)->i_location.partitionReferenceNum; 747 laarr[curr].extLength = EXT_RECORDED_ALLOCATED | 748 blocksize; 749 curr++; 750 751 if (blen != offset + 1) { 752 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) 753 laarr[curr].extLocation.logicalBlockNum += 754 offset + 1; 755 laarr[curr].extLength = (etype << 30) | 756 ((blen - (offset + 1)) << blocksize_bits); 757 curr++; 758 (*endnum)++; 759 } 760 } 761} 762 763static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, 764 kernel_long_ad laarr[EXTENT_MERGE_SIZE], 765 int *endnum) 766{ 767 int start, length = 0, currlength = 0, i; 768 769 if (*endnum >= (c + 1)) { 770 if (!lastblock) 771 return; 772 else 773 start = c; 774 } else { 775 if ((laarr[c + 1].extLength >> 30) == 776 (EXT_NOT_RECORDED_ALLOCATED >> 30)) { 777 start = c + 1; 778 length = currlength = 779 (((laarr[c + 1].extLength & 780 UDF_EXTENT_LENGTH_MASK) + 781 inode->i_sb->s_blocksize - 1) >> 782 inode->i_sb->s_blocksize_bits); 783 } else 784 start = c; 785 } 786 787 for (i = start + 1; i <= *endnum; i++) { 788 if (i == *endnum) { 789 if (lastblock) 790 length += UDF_DEFAULT_PREALLOC_BLOCKS; 791 } else if ((laarr[i].extLength >> 30) == 792 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { 793 length += (((laarr[i].extLength & 794 UDF_EXTENT_LENGTH_MASK) + 795 inode->i_sb->s_blocksize - 1) >> 796 inode->i_sb->s_blocksize_bits); 797 } else 798 break; 799 } 800 801 if (length) { 802 int next = laarr[start].extLocation.logicalBlockNum + 803 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + 804 inode->i_sb->s_blocksize - 1) >> 805 inode->i_sb->s_blocksize_bits); 806 int numalloc = udf_prealloc_blocks(inode->i_sb, inode, 807 laarr[start].extLocation.partitionReferenceNum, 808 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? 809 length : UDF_DEFAULT_PREALLOC_BLOCKS) - 810 currlength); 811 if (numalloc) { 812 if (start == (c + 1)) 813 laarr[start].extLength += 814 (numalloc << 815 inode->i_sb->s_blocksize_bits); 816 else { 817 memmove(&laarr[c + 2], &laarr[c + 1], 818 sizeof(long_ad) * (*endnum - (c + 1))); 819 (*endnum)++; 820 laarr[c + 1].extLocation.logicalBlockNum = next; 821 laarr[c + 1].extLocation.partitionReferenceNum = 822 laarr[c].extLocation. 823 partitionReferenceNum; 824 laarr[c + 1].extLength = 825 EXT_NOT_RECORDED_ALLOCATED | 826 (numalloc << 827 inode->i_sb->s_blocksize_bits); 828 start = c + 1; 829 } 830 831 for (i = start + 1; numalloc && i < *endnum; i++) { 832 int elen = ((laarr[i].extLength & 833 UDF_EXTENT_LENGTH_MASK) + 834 inode->i_sb->s_blocksize - 1) >> 835 inode->i_sb->s_blocksize_bits; 836 837 if (elen > numalloc) { 838 laarr[i].extLength -= 839 (numalloc << 840 inode->i_sb->s_blocksize_bits); 841 numalloc = 0; 842 } else { 843 numalloc -= elen; 844 if (*endnum > (i + 1)) 845 memmove(&laarr[i], 846 &laarr[i + 1], 847 sizeof(long_ad) * 848 (*endnum - (i + 1))); 849 i--; 850 (*endnum)--; 851 } 852 } 853 UDF_I(inode)->i_lenExtents += 854 numalloc << inode->i_sb->s_blocksize_bits; 855 } 856 } 857} 858 859static void udf_merge_extents(struct inode *inode, 860 kernel_long_ad laarr[EXTENT_MERGE_SIZE], 861 int *endnum) 862{ 863 int i; 864 unsigned long blocksize = inode->i_sb->s_blocksize; 865 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; 866 867 for (i = 0; i < (*endnum - 1); i++) { 868 kernel_long_ad *li /*l[i]*/ = &laarr[i]; 869 kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; 870 871 if (((li->extLength >> 30) == (lip1->extLength >> 30)) && 872 (((li->extLength >> 30) == 873 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || 874 ((lip1->extLocation.logicalBlockNum - 875 li->extLocation.logicalBlockNum) == 876 (((li->extLength & UDF_EXTENT_LENGTH_MASK) + 877 blocksize - 1) >> blocksize_bits)))) { 878 879 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + 880 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + 881 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { 882 lip1->extLength = (lip1->extLength - 883 (li->extLength & 884 UDF_EXTENT_LENGTH_MASK) + 885 UDF_EXTENT_LENGTH_MASK) & 886 ~(blocksize - 1); 887 li->extLength = (li->extLength & 888 UDF_EXTENT_FLAG_MASK) + 889 (UDF_EXTENT_LENGTH_MASK + 1) - 890 blocksize; 891 lip1->extLocation.logicalBlockNum = 892 li->extLocation.logicalBlockNum + 893 ((li->extLength & 894 UDF_EXTENT_LENGTH_MASK) >> 895 blocksize_bits); 896 } else { 897 li->extLength = lip1->extLength + 898 (((li->extLength & 899 UDF_EXTENT_LENGTH_MASK) + 900 blocksize - 1) & ~(blocksize - 1)); 901 if (*endnum > (i + 2)) 902 memmove(&laarr[i + 1], &laarr[i + 2], 903 sizeof(long_ad) * 904 (*endnum - (i + 2))); 905 i--; 906 (*endnum)--; 907 } 908 } else if (((li->extLength >> 30) == 909 (EXT_NOT_RECORDED_ALLOCATED >> 30)) && 910 ((lip1->extLength >> 30) == 911 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { 912 udf_free_blocks(inode->i_sb, inode, li->extLocation, 0, 913 ((li->extLength & 914 UDF_EXTENT_LENGTH_MASK) + 915 blocksize - 1) >> blocksize_bits); 916 li->extLocation.logicalBlockNum = 0; 917 li->extLocation.partitionReferenceNum = 0; 918 919 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + 920 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + 921 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { 922 lip1->extLength = (lip1->extLength - 923 (li->extLength & 924 UDF_EXTENT_LENGTH_MASK) + 925 UDF_EXTENT_LENGTH_MASK) & 926 ~(blocksize - 1); 927 li->extLength = (li->extLength & 928 UDF_EXTENT_FLAG_MASK) + 929 (UDF_EXTENT_LENGTH_MASK + 1) - 930 blocksize; 931 } else { 932 li->extLength = lip1->extLength + 933 (((li->extLength & 934 UDF_EXTENT_LENGTH_MASK) + 935 blocksize - 1) & ~(blocksize - 1)); 936 if (*endnum > (i + 2)) 937 memmove(&laarr[i + 1], &laarr[i + 2], 938 sizeof(long_ad) * 939 (*endnum - (i + 2))); 940 i--; 941 (*endnum)--; 942 } 943 } else if ((li->extLength >> 30) == 944 (EXT_NOT_RECORDED_ALLOCATED >> 30)) { 945 udf_free_blocks(inode->i_sb, inode, 946 li->extLocation, 0, 947 ((li->extLength & 948 UDF_EXTENT_LENGTH_MASK) + 949 blocksize - 1) >> blocksize_bits); 950 li->extLocation.logicalBlockNum = 0; 951 li->extLocation.partitionReferenceNum = 0; 952 li->extLength = (li->extLength & 953 UDF_EXTENT_LENGTH_MASK) | 954 EXT_NOT_RECORDED_NOT_ALLOCATED; 955 } 956 } 957} 958 959static void udf_update_extents(struct inode *inode, 960 kernel_long_ad laarr[EXTENT_MERGE_SIZE], 961 int startnum, int endnum, 962 struct extent_position *epos) 963{ 964 int start = 0, i; 965 kernel_lb_addr tmploc; 966 uint32_t tmplen; 967 968 if (startnum > endnum) { 969 for (i = 0; i < (startnum - endnum); i++) 970 udf_delete_aext(inode, *epos, laarr[i].extLocation, 971 laarr[i].extLength); 972 } else if (startnum < endnum) { 973 for (i = 0; i < (endnum - startnum); i++) { 974 udf_insert_aext(inode, *epos, laarr[i].extLocation, 975 laarr[i].extLength); 976 udf_next_aext(inode, epos, &laarr[i].extLocation, 977 &laarr[i].extLength, 1); 978 start++; 979 } 980 } 981 982 for (i = start; i < endnum; i++) { 983 udf_next_aext(inode, epos, &tmploc, &tmplen, 0); 984 udf_write_aext(inode, epos, laarr[i].extLocation, 985 laarr[i].extLength, 1); 986 } 987} 988 989struct buffer_head *udf_bread(struct inode *inode, int block, 990 int create, int *err) 991{ 992 struct buffer_head *bh = NULL; 993 994 bh = udf_getblk(inode, block, create, err); 995 if (!bh) 996 return NULL; 997 998 if (buffer_uptodate(bh)) 999 return bh; 1000 1001 ll_rw_block(READ, 1, &bh); 1002 1003 wait_on_buffer(bh); 1004 if (buffer_uptodate(bh)) 1005 return bh; 1006 1007 brelse(bh); 1008 *err = -EIO; 1009 return NULL; 1010} 1011 1012void udf_truncate(struct inode *inode) 1013{ 1014 int offset; 1015 int err; 1016 struct udf_inode_info *iinfo; 1017 1018 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1019 S_ISLNK(inode->i_mode))) 1020 return; 1021 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1022 return; 1023 1024 lock_kernel(); 1025 iinfo = UDF_I(inode); 1026 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { 1027 if (inode->i_sb->s_blocksize < 1028 (udf_file_entry_alloc_offset(inode) + 1029 inode->i_size)) { 1030 udf_expand_file_adinicb(inode, inode->i_size, &err); 1031 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { 1032 inode->i_size = iinfo->i_lenAlloc; 1033 unlock_kernel(); 1034 return; 1035 } else 1036 udf_truncate_extents(inode); 1037 } else { 1038 offset = inode->i_size & (inode->i_sb->s_blocksize - 1); 1039 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset, 1040 0x00, inode->i_sb->s_blocksize - 1041 offset - udf_file_entry_alloc_offset(inode)); 1042 iinfo->i_lenAlloc = inode->i_size; 1043 } 1044 } else { 1045 block_truncate_page(inode->i_mapping, inode->i_size, 1046 udf_get_block); 1047 udf_truncate_extents(inode); 1048 } 1049 1050 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); 1051 if (IS_SYNC(inode)) 1052 udf_sync_inode(inode); 1053 else 1054 mark_inode_dirty(inode); 1055 unlock_kernel(); 1056} 1057 1058static void __udf_read_inode(struct inode *inode) 1059{ 1060 struct buffer_head *bh = NULL; 1061 struct fileEntry *fe; 1062 uint16_t ident; 1063 struct udf_inode_info *iinfo = UDF_I(inode); 1064 1065 /* 1066 * Set defaults, but the inode is still incomplete! 1067 * Note: get_new_inode() sets the following on a new inode: 1068 * i_sb = sb 1069 * i_no = ino 1070 * i_flags = sb->s_flags 1071 * i_state = 0 1072 * clean_inode(): zero fills and sets 1073 * i_count = 1 1074 * i_nlink = 1 1075 * i_op = NULL; 1076 */ 1077 bh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 0, &ident); 1078 if (!bh) { 1079 printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh\n", 1080 inode->i_ino); 1081 make_bad_inode(inode); 1082 return; 1083 } 1084 1085 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && 1086 ident != TAG_IDENT_USE) { 1087 printk(KERN_ERR "udf: udf_read_inode(ino %ld) " 1088 "failed ident=%d\n", inode->i_ino, ident); 1089 brelse(bh); 1090 make_bad_inode(inode); 1091 return; 1092 } 1093 1094 fe = (struct fileEntry *)bh->b_data; 1095 1096 if (fe->icbTag.strategyType == cpu_to_le16(4096)) { 1097 struct buffer_head *ibh; 1098 1099 ibh = udf_read_ptagged(inode->i_sb, iinfo->i_location, 1, 1100 &ident); 1101 if (ident == TAG_IDENT_IE && ibh) { 1102 struct buffer_head *nbh = NULL; 1103 kernel_lb_addr loc; 1104 struct indirectEntry *ie; 1105 1106 ie = (struct indirectEntry *)ibh->b_data; 1107 loc = lelb_to_cpu(ie->indirectICB.extLocation); 1108 1109 if (ie->indirectICB.extLength && 1110 (nbh = udf_read_ptagged(inode->i_sb, loc, 0, 1111 &ident))) { 1112 if (ident == TAG_IDENT_FE || 1113 ident == TAG_IDENT_EFE) { 1114 memcpy(&iinfo->i_location, 1115 &loc, 1116 sizeof(kernel_lb_addr)); 1117 brelse(bh); 1118 brelse(ibh); 1119 brelse(nbh); 1120 __udf_read_inode(inode); 1121 return; 1122 } 1123 brelse(nbh); 1124 } 1125 } 1126 brelse(ibh); 1127 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { 1128 printk(KERN_ERR "udf: unsupported strategy type: %d\n", 1129 le16_to_cpu(fe->icbTag.strategyType)); 1130 brelse(bh); 1131 make_bad_inode(inode); 1132 return; 1133 } 1134 udf_fill_inode(inode, bh); 1135 1136 brelse(bh); 1137} 1138 1139static void udf_fill_inode_time(struct timespec *tspec, 1140 const timestamp *tstamp, 1141 struct udf_sb_info *sbi) 1142{ 1143 time_t convtime; 1144 long convtime_usec; 1145 if (udf_stamp_to_time(&convtime, &convtime_usec, 1146 lets_to_cpu(*tstamp))) { 1147 tspec->tv_sec = convtime; 1148 tspec->tv_nsec = convtime_usec * 1000; 1149 } else 1150 *tspec = sbi->s_record_time; 1151} 1152 1153static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) 1154{ 1155 struct fileEntry *fe; 1156 struct extendedFileEntry *efe; 1157 int offset; 1158 struct udf_sb_info *sbi = UDF_SB(inode->i_sb); 1159 struct udf_inode_info *iinfo = UDF_I(inode); 1160 1161 fe = (struct fileEntry *)bh->b_data; 1162 efe = (struct extendedFileEntry *)bh->b_data; 1163 1164 if (fe->icbTag.strategyType == cpu_to_le16(4)) 1165 iinfo->i_strat4096 = 0; 1166 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ 1167 iinfo->i_strat4096 = 1; 1168 1169 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & 1170 ICBTAG_FLAG_AD_MASK; 1171 iinfo->i_unique = 0; 1172 iinfo->i_lenEAttr = 0; 1173 iinfo->i_lenExtents = 0; 1174 iinfo->i_lenAlloc = 0; 1175 iinfo->i_next_alloc_block = 0; 1176 iinfo->i_next_alloc_goal = 0; 1177 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { 1178 iinfo->i_efe = 1; 1179 iinfo->i_use = 0; 1180 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - 1181 sizeof(struct extendedFileEntry))) { 1182 make_bad_inode(inode); 1183 return; 1184 } 1185 memcpy(iinfo->i_ext.i_data, 1186 bh->b_data + sizeof(struct extendedFileEntry), 1187 inode->i_sb->s_blocksize - 1188 sizeof(struct extendedFileEntry)); 1189 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { 1190 iinfo->i_efe = 0; 1191 iinfo->i_use = 0; 1192 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - 1193 sizeof(struct fileEntry))) { 1194 make_bad_inode(inode); 1195 return; 1196 } 1197 memcpy(iinfo->i_ext.i_data, 1198 bh->b_data + sizeof(struct fileEntry), 1199 inode->i_sb->s_blocksize - sizeof(struct fileEntry)); 1200 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { 1201 iinfo->i_efe = 0; 1202 iinfo->i_use = 1; 1203 iinfo->i_lenAlloc = le32_to_cpu( 1204 ((struct unallocSpaceEntry *)bh->b_data)-> 1205 lengthAllocDescs); 1206 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - 1207 sizeof(struct unallocSpaceEntry))) { 1208 make_bad_inode(inode); 1209 return; 1210 } 1211 memcpy(iinfo->i_ext.i_data, 1212 bh->b_data + sizeof(struct unallocSpaceEntry), 1213 inode->i_sb->s_blocksize - 1214 sizeof(struct unallocSpaceEntry)); 1215 return; 1216 } 1217 1218 inode->i_uid = le32_to_cpu(fe->uid); 1219 if (inode->i_uid == -1 || 1220 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || 1221 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) 1222 inode->i_uid = UDF_SB(inode->i_sb)->s_uid; 1223 1224 inode->i_gid = le32_to_cpu(fe->gid); 1225 if (inode->i_gid == -1 || 1226 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || 1227 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) 1228 inode->i_gid = UDF_SB(inode->i_sb)->s_gid; 1229 1230 inode->i_nlink = le16_to_cpu(fe->fileLinkCount); 1231 if (!inode->i_nlink) 1232 inode->i_nlink = 1; 1233 1234 inode->i_size = le64_to_cpu(fe->informationLength); 1235 iinfo->i_lenExtents = inode->i_size; 1236 1237 inode->i_mode = udf_convert_permissions(fe); 1238 inode->i_mode &= ~UDF_SB(inode->i_sb)->s_umask; 1239 1240 if (iinfo->i_efe == 0) { 1241 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << 1242 (inode->i_sb->s_blocksize_bits - 9); 1243 1244 udf_fill_inode_time(&inode->i_atime, &fe->accessTime, sbi); 1245 udf_fill_inode_time(&inode->i_mtime, &fe->modificationTime, 1246 sbi); 1247 udf_fill_inode_time(&inode->i_ctime, &fe->attrTime, sbi); 1248 1249 iinfo->i_unique = le64_to_cpu(fe->uniqueID); 1250 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); 1251 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); 1252 offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr; 1253 } else { 1254 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << 1255 (inode->i_sb->s_blocksize_bits - 9); 1256 1257 udf_fill_inode_time(&inode->i_atime, &efe->accessTime, sbi); 1258 udf_fill_inode_time(&inode->i_mtime, &efe->modificationTime, 1259 sbi); 1260 udf_fill_inode_time(&iinfo->i_crtime, &efe->createTime, sbi); 1261 udf_fill_inode_time(&inode->i_ctime, &efe->attrTime, sbi); 1262 1263 iinfo->i_unique = le64_to_cpu(efe->uniqueID); 1264 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); 1265 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); 1266 offset = sizeof(struct extendedFileEntry) + 1267 iinfo->i_lenEAttr; 1268 } 1269 1270 switch (fe->icbTag.fileType) { 1271 case ICBTAG_FILE_TYPE_DIRECTORY: 1272 inode->i_op = &udf_dir_inode_operations; 1273 inode->i_fop = &udf_dir_operations; 1274 inode->i_mode |= S_IFDIR; 1275 inc_nlink(inode); 1276 break; 1277 case ICBTAG_FILE_TYPE_REALTIME: 1278 case ICBTAG_FILE_TYPE_REGULAR: 1279 case ICBTAG_FILE_TYPE_UNDEF: 1280 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 1281 inode->i_data.a_ops = &udf_adinicb_aops; 1282 else 1283 inode->i_data.a_ops = &udf_aops; 1284 inode->i_op = &udf_file_inode_operations; 1285 inode->i_fop = &udf_file_operations; 1286 inode->i_mode |= S_IFREG; 1287 break; 1288 case ICBTAG_FILE_TYPE_BLOCK: 1289 inode->i_mode |= S_IFBLK; 1290 break; 1291 case ICBTAG_FILE_TYPE_CHAR: 1292 inode->i_mode |= S_IFCHR; 1293 break; 1294 case ICBTAG_FILE_TYPE_FIFO: 1295 init_special_inode(inode, inode->i_mode | S_IFIFO, 0); 1296 break; 1297 case ICBTAG_FILE_TYPE_SOCKET: 1298 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); 1299 break; 1300 case ICBTAG_FILE_TYPE_SYMLINK: 1301 inode->i_data.a_ops = &udf_symlink_aops; 1302 inode->i_op = &page_symlink_inode_operations; 1303 inode->i_mode = S_IFLNK | S_IRWXUGO; 1304 break; 1305 default: 1306 printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown " 1307 "file type=%d\n", inode->i_ino, 1308 fe->icbTag.fileType); 1309 make_bad_inode(inode); 1310 return; 1311 } 1312 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 1313 struct deviceSpec *dsea = 1314 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); 1315 if (dsea) { 1316 init_special_inode(inode, inode->i_mode, 1317 MKDEV(le32_to_cpu(dsea->majorDeviceIdent), 1318 le32_to_cpu(dsea->minorDeviceIdent))); 1319 /* Developer ID ??? */ 1320 } else 1321 make_bad_inode(inode); 1322 } 1323} 1324 1325static int udf_alloc_i_data(struct inode *inode, size_t size) 1326{ 1327 struct udf_inode_info *iinfo = UDF_I(inode); 1328 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); 1329 1330 if (!iinfo->i_ext.i_data) { 1331 printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) " 1332 "no free memory\n", inode->i_ino); 1333 return -ENOMEM; 1334 } 1335 1336 return 0; 1337} 1338 1339static mode_t udf_convert_permissions(struct fileEntry *fe) 1340{ 1341 mode_t mode; 1342 uint32_t permissions; 1343 uint32_t flags; 1344 1345 permissions = le32_to_cpu(fe->permissions); 1346 flags = le16_to_cpu(fe->icbTag.flags); 1347 1348 mode = ((permissions) & S_IRWXO) | 1349 ((permissions >> 2) & S_IRWXG) | 1350 ((permissions >> 4) & S_IRWXU) | 1351 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | 1352 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | 1353 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); 1354 1355 return mode; 1356} 1357 1358int udf_write_inode(struct inode *inode, int sync) 1359{ 1360 int ret; 1361 1362 lock_kernel(); 1363 ret = udf_update_inode(inode, sync); 1364 unlock_kernel(); 1365 1366 return ret; 1367} 1368 1369int udf_sync_inode(struct inode *inode) 1370{ 1371 return udf_update_inode(inode, 1); 1372} 1373 1374static int udf_update_inode(struct inode *inode, int do_sync) 1375{ 1376 struct buffer_head *bh = NULL; 1377 struct fileEntry *fe; 1378 struct extendedFileEntry *efe; 1379 uint32_t udfperms; 1380 uint16_t icbflags; 1381 uint16_t crclen; 1382 kernel_timestamp cpu_time; 1383 int err = 0; 1384 struct udf_sb_info *sbi = UDF_SB(inode->i_sb); 1385 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; 1386 struct udf_inode_info *iinfo = UDF_I(inode); 1387 1388 bh = udf_tread(inode->i_sb, 1389 udf_get_lb_pblock(inode->i_sb, 1390 iinfo->i_location, 0)); 1391 if (!bh) { 1392 udf_debug("bread failure\n"); 1393 return -EIO; 1394 } 1395 1396 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); 1397 1398 fe = (struct fileEntry *)bh->b_data; 1399 efe = (struct extendedFileEntry *)bh->b_data; 1400 1401 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { 1402 struct unallocSpaceEntry *use = 1403 (struct unallocSpaceEntry *)bh->b_data; 1404 1405 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); 1406 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), 1407 iinfo->i_ext.i_data, inode->i_sb->s_blocksize - 1408 sizeof(struct unallocSpaceEntry)); 1409 crclen = sizeof(struct unallocSpaceEntry) + 1410 iinfo->i_lenAlloc - sizeof(tag); 1411 use->descTag.tagLocation = cpu_to_le32( 1412 iinfo->i_location. 1413 logicalBlockNum); 1414 use->descTag.descCRCLength = cpu_to_le16(crclen); 1415 use->descTag.descCRC = cpu_to_le16(udf_crc((char *)use + 1416 sizeof(tag), crclen, 1417 0)); 1418 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag); 1419 1420 mark_buffer_dirty(bh); 1421 brelse(bh); 1422 return err; 1423 } 1424 1425 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) 1426 fe->uid = cpu_to_le32(-1); 1427 else 1428 fe->uid = cpu_to_le32(inode->i_uid); 1429 1430 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) 1431 fe->gid = cpu_to_le32(-1); 1432 else 1433 fe->gid = cpu_to_le32(inode->i_gid); 1434 1435 udfperms = ((inode->i_mode & S_IRWXO)) | 1436 ((inode->i_mode & S_IRWXG) << 2) | 1437 ((inode->i_mode & S_IRWXU) << 4); 1438 1439 udfperms |= (le32_to_cpu(fe->permissions) & 1440 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | 1441 FE_PERM_G_DELETE | FE_PERM_G_CHATTR | 1442 FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); 1443 fe->permissions = cpu_to_le32(udfperms); 1444 1445 if (S_ISDIR(inode->i_mode)) 1446 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); 1447 else 1448 fe->fileLinkCount = cpu_to_le16(inode->i_nlink); 1449 1450 fe->informationLength = cpu_to_le64(inode->i_size); 1451 1452 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 1453 regid *eid; 1454 struct deviceSpec *dsea = 1455 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); 1456 if (!dsea) { 1457 dsea = (struct deviceSpec *) 1458 udf_add_extendedattr(inode, 1459 sizeof(struct deviceSpec) + 1460 sizeof(regid), 12, 0x3); 1461 dsea->attrType = cpu_to_le32(12); 1462 dsea->attrSubtype = 1; 1463 dsea->attrLength = cpu_to_le32( 1464 sizeof(struct deviceSpec) + 1465 sizeof(regid)); 1466 dsea->impUseLength = cpu_to_le32(sizeof(regid)); 1467 } 1468 eid = (regid *)dsea->impUse; 1469 memset(eid, 0, sizeof(regid)); 1470 strcpy(eid->ident, UDF_ID_DEVELOPER); 1471 eid->identSuffix[0] = UDF_OS_CLASS_UNIX; 1472 eid->identSuffix[1] = UDF_OS_ID_LINUX; 1473 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); 1474 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); 1475 } 1476 1477 if (iinfo->i_efe == 0) { 1478 memcpy(bh->b_data + sizeof(struct fileEntry), 1479 iinfo->i_ext.i_data, 1480 inode->i_sb->s_blocksize - sizeof(struct fileEntry)); 1481 fe->logicalBlocksRecorded = cpu_to_le64( 1482 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> 1483 (blocksize_bits - 9)); 1484 1485 if (udf_time_to_stamp(&cpu_time, inode->i_atime)) 1486 fe->accessTime = cpu_to_lets(cpu_time); 1487 if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) 1488 fe->modificationTime = cpu_to_lets(cpu_time); 1489 if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) 1490 fe->attrTime = cpu_to_lets(cpu_time); 1491 memset(&(fe->impIdent), 0, sizeof(regid)); 1492 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); 1493 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; 1494 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; 1495 fe->uniqueID = cpu_to_le64(iinfo->i_unique); 1496 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); 1497 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); 1498 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); 1499 crclen = sizeof(struct fileEntry); 1500 } else { 1501 memcpy(bh->b_data + sizeof(struct extendedFileEntry), 1502 iinfo->i_ext.i_data, 1503 inode->i_sb->s_blocksize - 1504 sizeof(struct extendedFileEntry)); 1505 efe->objectSize = cpu_to_le64(inode->i_size); 1506 efe->logicalBlocksRecorded = cpu_to_le64( 1507 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> 1508 (blocksize_bits - 9)); 1509 1510 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec || 1511 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec && 1512 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec)) 1513 iinfo->i_crtime = inode->i_atime; 1514 1515 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec || 1516 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec && 1517 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec)) 1518 iinfo->i_crtime = inode->i_mtime; 1519 1520 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec || 1521 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec && 1522 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec)) 1523 iinfo->i_crtime = inode->i_ctime; 1524 1525 if (udf_time_to_stamp(&cpu_time, inode->i_atime)) 1526 efe->accessTime = cpu_to_lets(cpu_time); 1527 if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) 1528 efe->modificationTime = cpu_to_lets(cpu_time); 1529 if (udf_time_to_stamp(&cpu_time, iinfo->i_crtime)) 1530 efe->createTime = cpu_to_lets(cpu_time); 1531 if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) 1532 efe->attrTime = cpu_to_lets(cpu_time); 1533 1534 memset(&(efe->impIdent), 0, sizeof(regid)); 1535 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); 1536 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; 1537 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; 1538 efe->uniqueID = cpu_to_le64(iinfo->i_unique); 1539 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); 1540 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); 1541 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); 1542 crclen = sizeof(struct extendedFileEntry); 1543 } 1544 if (iinfo->i_strat4096) { 1545 fe->icbTag.strategyType = cpu_to_le16(4096); 1546 fe->icbTag.strategyParameter = cpu_to_le16(1); 1547 fe->icbTag.numEntries = cpu_to_le16(2); 1548 } else { 1549 fe->icbTag.strategyType = cpu_to_le16(4); 1550 fe->icbTag.numEntries = cpu_to_le16(1); 1551 } 1552 1553 if (S_ISDIR(inode->i_mode)) 1554 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; 1555 else if (S_ISREG(inode->i_mode)) 1556 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; 1557 else if (S_ISLNK(inode->i_mode)) 1558 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; 1559 else if (S_ISBLK(inode->i_mode)) 1560 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; 1561 else if (S_ISCHR(inode->i_mode)) 1562 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; 1563 else if (S_ISFIFO(inode->i_mode)) 1564 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; 1565 else if (S_ISSOCK(inode->i_mode)) 1566 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; 1567 1568 icbflags = iinfo->i_alloc_type | 1569 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | 1570 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | 1571 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | 1572 (le16_to_cpu(fe->icbTag.flags) & 1573 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | 1574 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); 1575 1576 fe->icbTag.flags = cpu_to_le16(icbflags); 1577 if (sbi->s_udfrev >= 0x0200) 1578 fe->descTag.descVersion = cpu_to_le16(3); 1579 else 1580 fe->descTag.descVersion = cpu_to_le16(2); 1581 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); 1582 fe->descTag.tagLocation = cpu_to_le32( 1583 iinfo->i_location.logicalBlockNum); 1584 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - 1585 sizeof(tag); 1586 fe->descTag.descCRCLength = cpu_to_le16(crclen); 1587 fe->descTag.descCRC = cpu_to_le16(udf_crc((char *)fe + sizeof(tag), 1588 crclen, 0)); 1589 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); 1590 1591 /* write the data blocks */ 1592 mark_buffer_dirty(bh); 1593 if (do_sync) { 1594 sync_dirty_buffer(bh); 1595 if (buffer_req(bh) && !buffer_uptodate(bh)) { 1596 printk(KERN_WARNING "IO error syncing udf inode " 1597 "[%s:%08lx]\n", inode->i_sb->s_id, 1598 inode->i_ino); 1599 err = -EIO; 1600 } 1601 } 1602 brelse(bh); 1603 1604 return err; 1605} 1606 1607struct inode *udf_iget(struct super_block *sb, kernel_lb_addr ino) 1608{ 1609 unsigned long block = udf_get_lb_pblock(sb, ino, 0); 1610 struct inode *inode = iget_locked(sb, block); 1611 1612 if (!inode) 1613 return NULL; 1614 1615 if (inode->i_state & I_NEW) { 1616 memcpy(&UDF_I(inode)->i_location, &ino, sizeof(kernel_lb_addr)); 1617 __udf_read_inode(inode); 1618 unlock_new_inode(inode); 1619 } 1620 1621 if (is_bad_inode(inode)) 1622 goto out_iput; 1623 1624 if (ino.logicalBlockNum >= UDF_SB(sb)-> 1625 s_partmaps[ino.partitionReferenceNum].s_partition_len) { 1626 udf_debug("block=%d, partition=%d out of range\n", 1627 ino.logicalBlockNum, ino.partitionReferenceNum); 1628 make_bad_inode(inode); 1629 goto out_iput; 1630 } 1631 1632 return inode; 1633 1634 out_iput: 1635 iput(inode); 1636 return NULL; 1637} 1638 1639int8_t udf_add_aext(struct inode *inode, struct extent_position *epos, 1640 kernel_lb_addr eloc, uint32_t elen, int inc) 1641{ 1642 int adsize; 1643 short_ad *sad = NULL; 1644 long_ad *lad = NULL; 1645 struct allocExtDesc *aed; 1646 int8_t etype; 1647 uint8_t *ptr; 1648 struct udf_inode_info *iinfo = UDF_I(inode); 1649 1650 if (!epos->bh) 1651 ptr = iinfo->i_ext.i_data + epos->offset - 1652 udf_file_entry_alloc_offset(inode) + 1653 iinfo->i_lenEAttr; 1654 else 1655 ptr = epos->bh->b_data + epos->offset; 1656 1657 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 1658 adsize = sizeof(short_ad); 1659 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 1660 adsize = sizeof(long_ad); 1661 else 1662 return -1; 1663 1664 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { 1665 char *sptr, *dptr; 1666 struct buffer_head *nbh; 1667 int err, loffset; 1668 kernel_lb_addr obloc = epos->block; 1669 1670 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, 1671 obloc.partitionReferenceNum, 1672 obloc.logicalBlockNum, &err); 1673 if (!epos->block.logicalBlockNum) 1674 return -1; 1675 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, 1676 epos->block, 1677 0)); 1678 if (!nbh) 1679 return -1; 1680 lock_buffer(nbh); 1681 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); 1682 set_buffer_uptodate(nbh); 1683 unlock_buffer(nbh); 1684 mark_buffer_dirty_inode(nbh, inode); 1685 1686 aed = (struct allocExtDesc *)(nbh->b_data); 1687 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) 1688 aed->previousAllocExtLocation = 1689 cpu_to_le32(obloc.logicalBlockNum); 1690 if (epos->offset + adsize > inode->i_sb->s_blocksize) { 1691 loffset = epos->offset; 1692 aed->lengthAllocDescs = cpu_to_le32(adsize); 1693 sptr = ptr - adsize; 1694 dptr = nbh->b_data + sizeof(struct allocExtDesc); 1695 memcpy(dptr, sptr, adsize); 1696 epos->offset = sizeof(struct allocExtDesc) + adsize; 1697 } else { 1698 loffset = epos->offset + adsize; 1699 aed->lengthAllocDescs = cpu_to_le32(0); 1700 sptr = ptr; 1701 epos->offset = sizeof(struct allocExtDesc); 1702 1703 if (epos->bh) { 1704 aed = (struct allocExtDesc *)epos->bh->b_data; 1705 le32_add_cpu(&aed->lengthAllocDescs, adsize); 1706 } else { 1707 iinfo->i_lenAlloc += adsize; 1708 mark_inode_dirty(inode); 1709 } 1710 } 1711 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200) 1712 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, 1713 epos->block.logicalBlockNum, sizeof(tag)); 1714 else 1715 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, 1716 epos->block.logicalBlockNum, sizeof(tag)); 1717 switch (iinfo->i_alloc_type) { 1718 case ICBTAG_FLAG_AD_SHORT: 1719 sad = (short_ad *)sptr; 1720 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | 1721 inode->i_sb->s_blocksize); 1722 sad->extPosition = 1723 cpu_to_le32(epos->block.logicalBlockNum); 1724 break; 1725 case ICBTAG_FLAG_AD_LONG: 1726 lad = (long_ad *)sptr; 1727 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | 1728 inode->i_sb->s_blocksize); 1729 lad->extLocation = cpu_to_lelb(epos->block); 1730 memset(lad->impUse, 0x00, sizeof(lad->impUse)); 1731 break; 1732 } 1733 if (epos->bh) { 1734 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || 1735 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) 1736 udf_update_tag(epos->bh->b_data, loffset); 1737 else 1738 udf_update_tag(epos->bh->b_data, 1739 sizeof(struct allocExtDesc)); 1740 mark_buffer_dirty_inode(epos->bh, inode); 1741 brelse(epos->bh); 1742 } else { 1743 mark_inode_dirty(inode); 1744 } 1745 epos->bh = nbh; 1746 } 1747 1748 etype = udf_write_aext(inode, epos, eloc, elen, inc); 1749 1750 if (!epos->bh) { 1751 iinfo->i_lenAlloc += adsize; 1752 mark_inode_dirty(inode); 1753 } else { 1754 aed = (struct allocExtDesc *)epos->bh->b_data; 1755 le32_add_cpu(&aed->lengthAllocDescs, adsize); 1756 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || 1757 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) 1758 udf_update_tag(epos->bh->b_data, 1759 epos->offset + (inc ? 0 : adsize)); 1760 else 1761 udf_update_tag(epos->bh->b_data, 1762 sizeof(struct allocExtDesc)); 1763 mark_buffer_dirty_inode(epos->bh, inode); 1764 } 1765 1766 return etype; 1767} 1768 1769int8_t udf_write_aext(struct inode *inode, struct extent_position *epos, 1770 kernel_lb_addr eloc, uint32_t elen, int inc) 1771{ 1772 int adsize; 1773 uint8_t *ptr; 1774 short_ad *sad; 1775 long_ad *lad; 1776 struct udf_inode_info *iinfo = UDF_I(inode); 1777 1778 if (!epos->bh) 1779 ptr = iinfo->i_ext.i_data + epos->offset - 1780 udf_file_entry_alloc_offset(inode) + 1781 iinfo->i_lenEAttr; 1782 else 1783 ptr = epos->bh->b_data + epos->offset; 1784 1785 switch (iinfo->i_alloc_type) { 1786 case ICBTAG_FLAG_AD_SHORT: 1787 sad = (short_ad *)ptr; 1788 sad->extLength = cpu_to_le32(elen); 1789 sad->extPosition = cpu_to_le32(eloc.logicalBlockNum); 1790 adsize = sizeof(short_ad); 1791 break; 1792 case ICBTAG_FLAG_AD_LONG: 1793 lad = (long_ad *)ptr; 1794 lad->extLength = cpu_to_le32(elen); 1795 lad->extLocation = cpu_to_lelb(eloc); 1796 memset(lad->impUse, 0x00, sizeof(lad->impUse)); 1797 adsize = sizeof(long_ad); 1798 break; 1799 default: 1800 return -1; 1801 } 1802 1803 if (epos->bh) { 1804 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || 1805 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { 1806 struct allocExtDesc *aed = 1807 (struct allocExtDesc *)epos->bh->b_data; 1808 udf_update_tag(epos->bh->b_data, 1809 le32_to_cpu(aed->lengthAllocDescs) + 1810 sizeof(struct allocExtDesc)); 1811 } 1812 mark_buffer_dirty_inode(epos->bh, inode); 1813 } else { 1814 mark_inode_dirty(inode); 1815 } 1816 1817 if (inc) 1818 epos->offset += adsize; 1819 1820 return (elen >> 30); 1821} 1822 1823int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, 1824 kernel_lb_addr *eloc, uint32_t *elen, int inc) 1825{ 1826 int8_t etype; 1827 1828 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == 1829 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { 1830 int block; 1831 epos->block = *eloc; 1832 epos->offset = sizeof(struct allocExtDesc); 1833 brelse(epos->bh); 1834 block = udf_get_lb_pblock(inode->i_sb, epos->block, 0); 1835 epos->bh = udf_tread(inode->i_sb, block); 1836 if (!epos->bh) { 1837 udf_debug("reading block %d failed!\n", block); 1838 return -1; 1839 } 1840 } 1841 1842 return etype; 1843} 1844 1845int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, 1846 kernel_lb_addr *eloc, uint32_t *elen, int inc) 1847{ 1848 int alen; 1849 int8_t etype; 1850 uint8_t *ptr; 1851 short_ad *sad; 1852 long_ad *lad; 1853 struct udf_inode_info *iinfo = UDF_I(inode); 1854 1855 if (!epos->bh) { 1856 if (!epos->offset) 1857 epos->offset = udf_file_entry_alloc_offset(inode); 1858 ptr = iinfo->i_ext.i_data + epos->offset - 1859 udf_file_entry_alloc_offset(inode) + 1860 iinfo->i_lenEAttr; 1861 alen = udf_file_entry_alloc_offset(inode) + 1862 iinfo->i_lenAlloc; 1863 } else { 1864 if (!epos->offset) 1865 epos->offset = sizeof(struct allocExtDesc); 1866 ptr = epos->bh->b_data + epos->offset; 1867 alen = sizeof(struct allocExtDesc) + 1868 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> 1869 lengthAllocDescs); 1870 } 1871 1872 switch (iinfo->i_alloc_type) { 1873 case ICBTAG_FLAG_AD_SHORT: 1874 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); 1875 if (!sad) 1876 return -1; 1877 etype = le32_to_cpu(sad->extLength) >> 30; 1878 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); 1879 eloc->partitionReferenceNum = 1880 iinfo->i_location.partitionReferenceNum; 1881 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; 1882 break; 1883 case ICBTAG_FLAG_AD_LONG: 1884 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); 1885 if (!lad) 1886 return -1; 1887 etype = le32_to_cpu(lad->extLength) >> 30; 1888 *eloc = lelb_to_cpu(lad->extLocation); 1889 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; 1890 break; 1891 default: 1892 udf_debug("alloc_type = %d unsupported\n", 1893 iinfo->i_alloc_type); 1894 return -1; 1895 } 1896 1897 return etype; 1898} 1899 1900static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, 1901 kernel_lb_addr neloc, uint32_t nelen) 1902{ 1903 kernel_lb_addr oeloc; 1904 uint32_t oelen; 1905 int8_t etype; 1906 1907 if (epos.bh) 1908 get_bh(epos.bh); 1909 1910 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { 1911 udf_write_aext(inode, &epos, neloc, nelen, 1); 1912 neloc = oeloc; 1913 nelen = (etype << 30) | oelen; 1914 } 1915 udf_add_aext(inode, &epos, neloc, nelen, 1); 1916 brelse(epos.bh); 1917 1918 return (nelen >> 30); 1919} 1920 1921int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, 1922 kernel_lb_addr eloc, uint32_t elen) 1923{ 1924 struct extent_position oepos; 1925 int adsize; 1926 int8_t etype; 1927 struct allocExtDesc *aed; 1928 struct udf_inode_info *iinfo; 1929 1930 if (epos.bh) { 1931 get_bh(epos.bh); 1932 get_bh(epos.bh); 1933 } 1934 1935 iinfo = UDF_I(inode); 1936 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 1937 adsize = sizeof(short_ad); 1938 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 1939 adsize = sizeof(long_ad); 1940 else 1941 adsize = 0; 1942 1943 oepos = epos; 1944 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) 1945 return -1; 1946 1947 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { 1948 udf_write_aext(inode, &oepos, eloc, (etype << 30) | elen, 1); 1949 if (oepos.bh != epos.bh) { 1950 oepos.block = epos.block; 1951 brelse(oepos.bh); 1952 get_bh(epos.bh); 1953 oepos.bh = epos.bh; 1954 oepos.offset = epos.offset - adsize; 1955 } 1956 } 1957 memset(&eloc, 0x00, sizeof(kernel_lb_addr)); 1958 elen = 0; 1959 1960 if (epos.bh != oepos.bh) { 1961 udf_free_blocks(inode->i_sb, inode, epos.block, 0, 1); 1962 udf_write_aext(inode, &oepos, eloc, elen, 1); 1963 udf_write_aext(inode, &oepos, eloc, elen, 1); 1964 if (!oepos.bh) { 1965 iinfo->i_lenAlloc -= (adsize * 2); 1966 mark_inode_dirty(inode); 1967 } else { 1968 aed = (struct allocExtDesc *)oepos.bh->b_data; 1969 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); 1970 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || 1971 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) 1972 udf_update_tag(oepos.bh->b_data, 1973 oepos.offset - (2 * adsize)); 1974 else 1975 udf_update_tag(oepos.bh->b_data, 1976 sizeof(struct allocExtDesc)); 1977 mark_buffer_dirty_inode(oepos.bh, inode); 1978 } 1979 } else { 1980 udf_write_aext(inode, &oepos, eloc, elen, 1); 1981 if (!oepos.bh) { 1982 iinfo->i_lenAlloc -= adsize; 1983 mark_inode_dirty(inode); 1984 } else { 1985 aed = (struct allocExtDesc *)oepos.bh->b_data; 1986 le32_add_cpu(&aed->lengthAllocDescs, -adsize); 1987 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || 1988 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) 1989 udf_update_tag(oepos.bh->b_data, 1990 epos.offset - adsize); 1991 else 1992 udf_update_tag(oepos.bh->b_data, 1993 sizeof(struct allocExtDesc)); 1994 mark_buffer_dirty_inode(oepos.bh, inode); 1995 } 1996 } 1997 1998 brelse(epos.bh); 1999 brelse(oepos.bh); 2000 2001 return (elen >> 30); 2002} 2003 2004int8_t inode_bmap(struct inode *inode, sector_t block, 2005 struct extent_position *pos, kernel_lb_addr *eloc, 2006 uint32_t *elen, sector_t *offset) 2007{ 2008 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; 2009 loff_t lbcount = 0, bcount = 2010 (loff_t) block << blocksize_bits; 2011 int8_t etype; 2012 struct udf_inode_info *iinfo; 2013 2014 iinfo = UDF_I(inode); 2015 pos->offset = 0; 2016 pos->block = iinfo->i_location; 2017 pos->bh = NULL; 2018 *elen = 0; 2019 2020 do { 2021 etype = udf_next_aext(inode, pos, eloc, elen, 1); 2022 if (etype == -1) { 2023 *offset = (bcount - lbcount) >> blocksize_bits; 2024 iinfo->i_lenExtents = lbcount; 2025 return -1; 2026 } 2027 lbcount += *elen; 2028 } while (lbcount <= bcount); 2029 2030 *offset = (bcount + *elen - lbcount) >> blocksize_bits; 2031 2032 return etype; 2033} 2034 2035long udf_block_map(struct inode *inode, sector_t block) 2036{ 2037 kernel_lb_addr eloc; 2038 uint32_t elen; 2039 sector_t offset; 2040 struct extent_position epos = {}; 2041 int ret; 2042 2043 lock_kernel(); 2044 2045 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == 2046 (EXT_RECORDED_ALLOCATED >> 30)) 2047 ret = udf_get_lb_pblock(inode->i_sb, eloc, offset); 2048 else 2049 ret = 0; 2050 2051 unlock_kernel(); 2052 brelse(epos.bh); 2053 2054 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) 2055 return udf_fixed_to_variable(ret); 2056 else 2057 return ret; 2058} 2059