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/module.h> 35 #include <linux/pagemap.h> 36 #include <linux/buffer_head.h> 37 #include <linux/writeback.h> 38 #include <linux/slab.h> 39 #include <linux/crc-itu-t.h> 40 #include <linux/mpage.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 if (!inode->i_nlink && !is_bad_inode(inode)) { 78 want_delete = 1; 79 udf_setsize(inode, 0); 80 udf_update_inode(inode, IS_SYNC(inode)); 81 } else 82 truncate_inode_pages(&inode->i_data, 0); 83 invalidate_inode_buffers(inode); 84 end_writeback(inode); 85 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && 86 inode->i_size != iinfo->i_lenExtents) { 87 udf_warn(inode->i_sb, "Inode %lu (mode %o) has inode size %llu different from extent length %llu. Filesystem need not be standards compliant.\n", 88 inode->i_ino, inode->i_mode, 89 (unsigned long long)inode->i_size, 90 (unsigned long long)iinfo->i_lenExtents); 91 } 92 kfree(iinfo->i_ext.i_data); 93 iinfo->i_ext.i_data = NULL; 94 if (want_delete) { 95 udf_free_inode(inode); 96 } 97 } 98 99 static int udf_writepage(struct page *page, struct writeback_control *wbc) 100 { 101 return block_write_full_page(page, udf_get_block, wbc); 102 } 103 104 static int udf_readpage(struct file *file, struct page *page) 105 { 106 return mpage_readpage(page, udf_get_block); 107 } 108 109 static int udf_readpages(struct file *file, struct address_space *mapping, 110 struct list_head *pages, unsigned nr_pages) 111 { 112 return mpage_readpages(mapping, pages, nr_pages, 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 struct inode *inode = mapping->host; 124 struct udf_inode_info *iinfo = UDF_I(inode); 125 loff_t isize = inode->i_size; 126 127 if (pos + len > isize) { 128 truncate_pagecache(inode, pos + len, isize); 129 if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { 130 down_write(&iinfo->i_data_sem); 131 udf_truncate_extents(inode); 132 up_write(&iinfo->i_data_sem); 133 } 134 } 135 } 136 137 return ret; 138 } 139 140 static sector_t udf_bmap(struct address_space *mapping, sector_t block) 141 { 142 return generic_block_bmap(mapping, block, udf_get_block); 143 } 144 145 const struct address_space_operations udf_aops = { 146 .readpage = udf_readpage, 147 .readpages = udf_readpages, 148 .writepage = udf_writepage, 149 .write_begin = udf_write_begin, 150 .write_end = generic_write_end, 151 .bmap = udf_bmap, 152 }; 153 154 int udf_expand_file_adinicb(struct inode *inode) 155 { 156 struct page *page; 157 char *kaddr; 158 struct udf_inode_info *iinfo = UDF_I(inode); 159 int err; 160 struct writeback_control udf_wbc = { 161 .sync_mode = WB_SYNC_NONE, 162 .nr_to_write = 1, 163 }; 164 165 if (!iinfo->i_lenAlloc) { 166 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 167 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; 168 else 169 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; 170 /* from now on we have normal address_space methods */ 171 inode->i_data.a_ops = &udf_aops; 172 mark_inode_dirty(inode); 173 return 0; 174 } 175 176 page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS); 177 if (!page) 178 return -ENOMEM; 179 180 if (!PageUptodate(page)) { 181 kaddr = kmap(page); 182 memset(kaddr + iinfo->i_lenAlloc, 0x00, 183 PAGE_CACHE_SIZE - iinfo->i_lenAlloc); 184 memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, 185 iinfo->i_lenAlloc); 186 flush_dcache_page(page); 187 SetPageUptodate(page); 188 kunmap(page); 189 } 190 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, 191 iinfo->i_lenAlloc); 192 iinfo->i_lenAlloc = 0; 193 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 194 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; 195 else 196 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; 197 /* from now on we have normal address_space methods */ 198 inode->i_data.a_ops = &udf_aops; 199 err = inode->i_data.a_ops->writepage(page, &udf_wbc); 200 if (err) { 201 /* Restore everything back so that we don't lose data... */ 202 lock_page(page); 203 kaddr = kmap(page); 204 memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr, 205 inode->i_size); 206 kunmap(page); 207 unlock_page(page); 208 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; 209 inode->i_data.a_ops = &udf_adinicb_aops; 210 } 211 page_cache_release(page); 212 mark_inode_dirty(inode); 213 214 return err; 215 } 216 217 struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, 218 int *err) 219 { 220 int newblock; 221 struct buffer_head *dbh = NULL; 222 struct kernel_lb_addr eloc; 223 uint8_t alloctype; 224 struct extent_position epos; 225 226 struct udf_fileident_bh sfibh, dfibh; 227 loff_t f_pos = udf_ext0_offset(inode); 228 int size = udf_ext0_offset(inode) + inode->i_size; 229 struct fileIdentDesc cfi, *sfi, *dfi; 230 struct udf_inode_info *iinfo = UDF_I(inode); 231 232 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 233 alloctype = ICBTAG_FLAG_AD_SHORT; 234 else 235 alloctype = ICBTAG_FLAG_AD_LONG; 236 237 if (!inode->i_size) { 238 iinfo->i_alloc_type = alloctype; 239 mark_inode_dirty(inode); 240 return NULL; 241 } 242 243 /* alloc block, and copy data to it */ 244 *block = udf_new_block(inode->i_sb, inode, 245 iinfo->i_location.partitionReferenceNum, 246 iinfo->i_location.logicalBlockNum, err); 247 if (!(*block)) 248 return NULL; 249 newblock = udf_get_pblock(inode->i_sb, *block, 250 iinfo->i_location.partitionReferenceNum, 251 0); 252 if (!newblock) 253 return NULL; 254 dbh = udf_tgetblk(inode->i_sb, newblock); 255 if (!dbh) 256 return NULL; 257 lock_buffer(dbh); 258 memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); 259 set_buffer_uptodate(dbh); 260 unlock_buffer(dbh); 261 mark_buffer_dirty_inode(dbh, inode); 262 263 sfibh.soffset = sfibh.eoffset = 264 f_pos & (inode->i_sb->s_blocksize - 1); 265 sfibh.sbh = sfibh.ebh = NULL; 266 dfibh.soffset = dfibh.eoffset = 0; 267 dfibh.sbh = dfibh.ebh = dbh; 268 while (f_pos < size) { 269 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; 270 sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, 271 NULL, NULL, NULL); 272 if (!sfi) { 273 brelse(dbh); 274 return NULL; 275 } 276 iinfo->i_alloc_type = alloctype; 277 sfi->descTag.tagLocation = cpu_to_le32(*block); 278 dfibh.soffset = dfibh.eoffset; 279 dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); 280 dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); 281 if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, 282 sfi->fileIdent + 283 le16_to_cpu(sfi->lengthOfImpUse))) { 284 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; 285 brelse(dbh); 286 return NULL; 287 } 288 } 289 mark_buffer_dirty_inode(dbh, inode); 290 291 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, 292 iinfo->i_lenAlloc); 293 iinfo->i_lenAlloc = 0; 294 eloc.logicalBlockNum = *block; 295 eloc.partitionReferenceNum = 296 iinfo->i_location.partitionReferenceNum; 297 iinfo->i_lenExtents = inode->i_size; 298 epos.bh = NULL; 299 epos.block = iinfo->i_location; 300 epos.offset = udf_file_entry_alloc_offset(inode); 301 udf_add_aext(inode, &epos, &eloc, inode->i_size, 0); 302 /* UniqueID stuff */ 303 304 brelse(epos.bh); 305 mark_inode_dirty(inode); 306 return dbh; 307 } 308 309 static int udf_get_block(struct inode *inode, sector_t block, 310 struct buffer_head *bh_result, int create) 311 { 312 int err, new; 313 struct buffer_head *bh; 314 sector_t phys = 0; 315 struct udf_inode_info *iinfo; 316 317 if (!create) { 318 phys = udf_block_map(inode, block); 319 if (phys) 320 map_bh(bh_result, inode->i_sb, phys); 321 return 0; 322 } 323 324 err = -EIO; 325 new = 0; 326 bh = NULL; 327 iinfo = UDF_I(inode); 328 329 down_write(&iinfo->i_data_sem); 330 if (block == iinfo->i_next_alloc_block + 1) { 331 iinfo->i_next_alloc_block++; 332 iinfo->i_next_alloc_goal++; 333 } 334 335 err = 0; 336 337 bh = inode_getblk(inode, block, &err, &phys, &new); 338 BUG_ON(bh); 339 if (err) 340 goto abort; 341 BUG_ON(!phys); 342 343 if (new) 344 set_buffer_new(bh_result); 345 map_bh(bh_result, inode->i_sb, phys); 346 347 abort: 348 up_write(&iinfo->i_data_sem); 349 return err; 350 } 351 352 static struct buffer_head *udf_getblk(struct inode *inode, long block, 353 int create, int *err) 354 { 355 struct buffer_head *bh; 356 struct buffer_head dummy; 357 358 dummy.b_state = 0; 359 dummy.b_blocknr = -1000; 360 *err = udf_get_block(inode, block, &dummy, create); 361 if (!*err && buffer_mapped(&dummy)) { 362 bh = sb_getblk(inode->i_sb, dummy.b_blocknr); 363 if (buffer_new(&dummy)) { 364 lock_buffer(bh); 365 memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); 366 set_buffer_uptodate(bh); 367 unlock_buffer(bh); 368 mark_buffer_dirty_inode(bh, inode); 369 } 370 return bh; 371 } 372 373 return NULL; 374 } 375 376 /* Extend the file by 'blocks' blocks, return the number of extents added */ 377 static int udf_do_extend_file(struct inode *inode, 378 struct extent_position *last_pos, 379 struct kernel_long_ad *last_ext, 380 sector_t blocks) 381 { 382 sector_t add; 383 int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); 384 struct super_block *sb = inode->i_sb; 385 struct kernel_lb_addr prealloc_loc = {}; 386 int prealloc_len = 0; 387 struct udf_inode_info *iinfo; 388 int err; 389 390 /* The previous extent is fake and we should not extend by anything 391 * - there's nothing to do... */ 392 if (!blocks && fake) 393 return 0; 394 395 iinfo = UDF_I(inode); 396 /* Round the last extent up to a multiple of block size */ 397 if (last_ext->extLength & (sb->s_blocksize - 1)) { 398 last_ext->extLength = 399 (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | 400 (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + 401 sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); 402 iinfo->i_lenExtents = 403 (iinfo->i_lenExtents + sb->s_blocksize - 1) & 404 ~(sb->s_blocksize - 1); 405 } 406 407 /* Last extent are just preallocated blocks? */ 408 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == 409 EXT_NOT_RECORDED_ALLOCATED) { 410 /* Save the extent so that we can reattach it to the end */ 411 prealloc_loc = last_ext->extLocation; 412 prealloc_len = last_ext->extLength; 413 /* Mark the extent as a hole */ 414 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | 415 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); 416 last_ext->extLocation.logicalBlockNum = 0; 417 last_ext->extLocation.partitionReferenceNum = 0; 418 } 419 420 /* Can we merge with the previous extent? */ 421 if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == 422 EXT_NOT_RECORDED_NOT_ALLOCATED) { 423 add = ((1 << 30) - sb->s_blocksize - 424 (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> 425 sb->s_blocksize_bits; 426 if (add > blocks) 427 add = blocks; 428 blocks -= add; 429 last_ext->extLength += add << sb->s_blocksize_bits; 430 } 431 432 if (fake) { 433 udf_add_aext(inode, last_pos, &last_ext->extLocation, 434 last_ext->extLength, 1); 435 count++; 436 } else 437 udf_write_aext(inode, last_pos, &last_ext->extLocation, 438 last_ext->extLength, 1); 439 440 /* Managed to do everything necessary? */ 441 if (!blocks) 442 goto out; 443 444 /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ 445 last_ext->extLocation.logicalBlockNum = 0; 446 last_ext->extLocation.partitionReferenceNum = 0; 447 add = (1 << (30-sb->s_blocksize_bits)) - 1; 448 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | 449 (add << sb->s_blocksize_bits); 450 451 /* Create enough extents to cover the whole hole */ 452 while (blocks > add) { 453 blocks -= add; 454 err = udf_add_aext(inode, last_pos, &last_ext->extLocation, 455 last_ext->extLength, 1); 456 if (err) 457 return err; 458 count++; 459 } 460 if (blocks) { 461 last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | 462 (blocks << sb->s_blocksize_bits); 463 err = udf_add_aext(inode, last_pos, &last_ext->extLocation, 464 last_ext->extLength, 1); 465 if (err) 466 return err; 467 count++; 468 } 469 470 out: 471 /* Do we have some preallocated blocks saved? */ 472 if (prealloc_len) { 473 err = udf_add_aext(inode, last_pos, &prealloc_loc, 474 prealloc_len, 1); 475 if (err) 476 return err; 477 last_ext->extLocation = prealloc_loc; 478 last_ext->extLength = prealloc_len; 479 count++; 480 } 481 482 /* last_pos should point to the last written extent... */ 483 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 484 last_pos->offset -= sizeof(struct short_ad); 485 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 486 last_pos->offset -= sizeof(struct long_ad); 487 else 488 return -EIO; 489 490 return count; 491 } 492 493 static int udf_extend_file(struct inode *inode, loff_t newsize) 494 { 495 496 struct extent_position epos; 497 struct kernel_lb_addr eloc; 498 uint32_t elen; 499 int8_t etype; 500 struct super_block *sb = inode->i_sb; 501 sector_t first_block = newsize >> sb->s_blocksize_bits, offset; 502 int adsize; 503 struct udf_inode_info *iinfo = UDF_I(inode); 504 struct kernel_long_ad extent; 505 int err; 506 507 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 508 adsize = sizeof(struct short_ad); 509 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 510 adsize = sizeof(struct long_ad); 511 else 512 BUG(); 513 514 etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset); 515 516 /* File has extent covering the new size (could happen when extending 517 * inside a block)? */ 518 if (etype != -1) 519 return 0; 520 if (newsize & (sb->s_blocksize - 1)) 521 offset++; 522 /* Extended file just to the boundary of the last file block? */ 523 if (offset == 0) 524 return 0; 525 526 /* Truncate is extending the file by 'offset' blocks */ 527 if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) || 528 (epos.bh && epos.offset == sizeof(struct allocExtDesc))) { 529 /* File has no extents at all or has empty last 530 * indirect extent! Create a fake extent... */ 531 extent.extLocation.logicalBlockNum = 0; 532 extent.extLocation.partitionReferenceNum = 0; 533 extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; 534 } else { 535 epos.offset -= adsize; 536 etype = udf_next_aext(inode, &epos, &extent.extLocation, 537 &extent.extLength, 0); 538 extent.extLength |= etype << 30; 539 } 540 err = udf_do_extend_file(inode, &epos, &extent, offset); 541 if (err < 0) 542 goto out; 543 err = 0; 544 iinfo->i_lenExtents = newsize; 545 out: 546 brelse(epos.bh); 547 return err; 548 } 549 550 static struct buffer_head *inode_getblk(struct inode *inode, sector_t block, 551 int *err, sector_t *phys, int *new) 552 { 553 static sector_t last_block; 554 struct buffer_head *result = NULL; 555 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; 556 struct extent_position prev_epos, cur_epos, next_epos; 557 int count = 0, startnum = 0, endnum = 0; 558 uint32_t elen = 0, tmpelen; 559 struct kernel_lb_addr eloc, tmpeloc; 560 int c = 1; 561 loff_t lbcount = 0, b_off = 0; 562 uint32_t newblocknum, newblock; 563 sector_t offset = 0; 564 int8_t etype; 565 struct udf_inode_info *iinfo = UDF_I(inode); 566 int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; 567 int lastblock = 0; 568 569 prev_epos.offset = udf_file_entry_alloc_offset(inode); 570 prev_epos.block = iinfo->i_location; 571 prev_epos.bh = NULL; 572 cur_epos = next_epos = prev_epos; 573 b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; 574 575 /* find the extent which contains the block we are looking for. 576 alternate between laarr[0] and laarr[1] for locations of the 577 current extent, and the previous extent */ 578 do { 579 if (prev_epos.bh != cur_epos.bh) { 580 brelse(prev_epos.bh); 581 get_bh(cur_epos.bh); 582 prev_epos.bh = cur_epos.bh; 583 } 584 if (cur_epos.bh != next_epos.bh) { 585 brelse(cur_epos.bh); 586 get_bh(next_epos.bh); 587 cur_epos.bh = next_epos.bh; 588 } 589 590 lbcount += elen; 591 592 prev_epos.block = cur_epos.block; 593 cur_epos.block = next_epos.block; 594 595 prev_epos.offset = cur_epos.offset; 596 cur_epos.offset = next_epos.offset; 597 598 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); 599 if (etype == -1) 600 break; 601 602 c = !c; 603 604 laarr[c].extLength = (etype << 30) | elen; 605 laarr[c].extLocation = eloc; 606 607 if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) 608 pgoal = eloc.logicalBlockNum + 609 ((elen + inode->i_sb->s_blocksize - 1) >> 610 inode->i_sb->s_blocksize_bits); 611 612 count++; 613 } while (lbcount + elen <= b_off); 614 615 b_off -= lbcount; 616 offset = b_off >> inode->i_sb->s_blocksize_bits; 617 /* 618 * Move prev_epos and cur_epos into indirect extent if we are at 619 * the pointer to it 620 */ 621 udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); 622 udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); 623 624 /* if the extent is allocated and recorded, return the block 625 if the extent is not a multiple of the blocksize, round up */ 626 627 if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { 628 if (elen & (inode->i_sb->s_blocksize - 1)) { 629 elen = EXT_RECORDED_ALLOCATED | 630 ((elen + inode->i_sb->s_blocksize - 1) & 631 ~(inode->i_sb->s_blocksize - 1)); 632 udf_write_aext(inode, &cur_epos, &eloc, elen, 1); 633 } 634 brelse(prev_epos.bh); 635 brelse(cur_epos.bh); 636 brelse(next_epos.bh); 637 newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset); 638 *phys = newblock; 639 return NULL; 640 } 641 642 last_block = block; 643 /* Are we beyond EOF? */ 644 if (etype == -1) { 645 int ret; 646 647 if (count) { 648 if (c) 649 laarr[0] = laarr[1]; 650 startnum = 1; 651 } else { 652 /* Create a fake extent when there's not one */ 653 memset(&laarr[0].extLocation, 0x00, 654 sizeof(struct kernel_lb_addr)); 655 laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; 656 /* Will udf_do_extend_file() create real extent from 657 a fake one? */ 658 startnum = (offset > 0); 659 } 660 /* Create extents for the hole between EOF and offset */ 661 ret = udf_do_extend_file(inode, &prev_epos, laarr, offset); 662 if (ret < 0) { 663 brelse(prev_epos.bh); 664 brelse(cur_epos.bh); 665 brelse(next_epos.bh); 666 *err = ret; 667 return NULL; 668 } 669 c = 0; 670 offset = 0; 671 count += ret; 672 /* We are not covered by a preallocated extent? */ 673 if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != 674 EXT_NOT_RECORDED_ALLOCATED) { 675 /* Is there any real extent? - otherwise we overwrite 676 * the fake one... */ 677 if (count) 678 c = !c; 679 laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | 680 inode->i_sb->s_blocksize; 681 memset(&laarr[c].extLocation, 0x00, 682 sizeof(struct kernel_lb_addr)); 683 count++; 684 endnum++; 685 } 686 endnum = c + 1; 687 lastblock = 1; 688 } else { 689 endnum = startnum = ((count > 2) ? 2 : count); 690 691 /* if the current extent is in position 0, 692 swap it with the previous */ 693 if (!c && count != 1) { 694 laarr[2] = laarr[0]; 695 laarr[0] = laarr[1]; 696 laarr[1] = laarr[2]; 697 c = 1; 698 } 699 700 /* if the current block is located in an extent, 701 read the next extent */ 702 etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); 703 if (etype != -1) { 704 laarr[c + 1].extLength = (etype << 30) | elen; 705 laarr[c + 1].extLocation = eloc; 706 count++; 707 startnum++; 708 endnum++; 709 } else 710 lastblock = 1; 711 } 712 713 /* if the current extent is not recorded but allocated, get the 714 * block in the extent corresponding to the requested block */ 715 if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) 716 newblocknum = laarr[c].extLocation.logicalBlockNum + offset; 717 else { /* otherwise, allocate a new block */ 718 if (iinfo->i_next_alloc_block == block) 719 goal = iinfo->i_next_alloc_goal; 720 721 if (!goal) { 722 if (!(goal = pgoal)) /* XXX: what was intended here? */ 723 goal = iinfo->i_location.logicalBlockNum + 1; 724 } 725 726 newblocknum = udf_new_block(inode->i_sb, inode, 727 iinfo->i_location.partitionReferenceNum, 728 goal, err); 729 if (!newblocknum) { 730 brelse(prev_epos.bh); 731 *err = -ENOSPC; 732 return NULL; 733 } 734 iinfo->i_lenExtents += inode->i_sb->s_blocksize; 735 } 736 737 /* if the extent the requsted block is located in contains multiple 738 * blocks, split the extent into at most three extents. blocks prior 739 * to requested block, requested block, and blocks after requested 740 * block */ 741 udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); 742 743 #ifdef UDF_PREALLOCATE 744 /* We preallocate blocks only for regular files. It also makes sense 745 * for directories but there's a problem when to drop the 746 * preallocation. We might use some delayed work for that but I feel 747 * it's overengineering for a filesystem like UDF. */ 748 if (S_ISREG(inode->i_mode)) 749 udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); 750 #endif 751 752 /* merge any continuous blocks in laarr */ 753 udf_merge_extents(inode, laarr, &endnum); 754 755 /* write back the new extents, inserting new extents if the new number 756 * of extents is greater than the old number, and deleting extents if 757 * the new number of extents is less than the old number */ 758 udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); 759 760 brelse(prev_epos.bh); 761 762 newblock = udf_get_pblock(inode->i_sb, newblocknum, 763 iinfo->i_location.partitionReferenceNum, 0); 764 if (!newblock) 765 return NULL; 766 *phys = newblock; 767 *err = 0; 768 *new = 1; 769 iinfo->i_next_alloc_block = block; 770 iinfo->i_next_alloc_goal = newblocknum; 771 inode->i_ctime = current_fs_time(inode->i_sb); 772 773 if (IS_SYNC(inode)) 774 udf_sync_inode(inode); 775 else 776 mark_inode_dirty(inode); 777 778 return result; 779 } 780 781 static void udf_split_extents(struct inode *inode, int *c, int offset, 782 int newblocknum, 783 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], 784 int *endnum) 785 { 786 unsigned long blocksize = inode->i_sb->s_blocksize; 787 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; 788 789 if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || 790 (laarr[*c].extLength >> 30) == 791 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { 792 int curr = *c; 793 int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + 794 blocksize - 1) >> blocksize_bits; 795 int8_t etype = (laarr[curr].extLength >> 30); 796 797 if (blen == 1) 798 ; 799 else if (!offset || blen == offset + 1) { 800 laarr[curr + 2] = laarr[curr + 1]; 801 laarr[curr + 1] = laarr[curr]; 802 } else { 803 laarr[curr + 3] = laarr[curr + 1]; 804 laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; 805 } 806 807 if (offset) { 808 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { 809 udf_free_blocks(inode->i_sb, inode, 810 &laarr[curr].extLocation, 811 0, offset); 812 laarr[curr].extLength = 813 EXT_NOT_RECORDED_NOT_ALLOCATED | 814 (offset << blocksize_bits); 815 laarr[curr].extLocation.logicalBlockNum = 0; 816 laarr[curr].extLocation. 817 partitionReferenceNum = 0; 818 } else 819 laarr[curr].extLength = (etype << 30) | 820 (offset << blocksize_bits); 821 curr++; 822 (*c)++; 823 (*endnum)++; 824 } 825 826 laarr[curr].extLocation.logicalBlockNum = newblocknum; 827 if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) 828 laarr[curr].extLocation.partitionReferenceNum = 829 UDF_I(inode)->i_location.partitionReferenceNum; 830 laarr[curr].extLength = EXT_RECORDED_ALLOCATED | 831 blocksize; 832 curr++; 833 834 if (blen != offset + 1) { 835 if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) 836 laarr[curr].extLocation.logicalBlockNum += 837 offset + 1; 838 laarr[curr].extLength = (etype << 30) | 839 ((blen - (offset + 1)) << blocksize_bits); 840 curr++; 841 (*endnum)++; 842 } 843 } 844 } 845 846 static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, 847 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], 848 int *endnum) 849 { 850 int start, length = 0, currlength = 0, i; 851 852 if (*endnum >= (c + 1)) { 853 if (!lastblock) 854 return; 855 else 856 start = c; 857 } else { 858 if ((laarr[c + 1].extLength >> 30) == 859 (EXT_NOT_RECORDED_ALLOCATED >> 30)) { 860 start = c + 1; 861 length = currlength = 862 (((laarr[c + 1].extLength & 863 UDF_EXTENT_LENGTH_MASK) + 864 inode->i_sb->s_blocksize - 1) >> 865 inode->i_sb->s_blocksize_bits); 866 } else 867 start = c; 868 } 869 870 for (i = start + 1; i <= *endnum; i++) { 871 if (i == *endnum) { 872 if (lastblock) 873 length += UDF_DEFAULT_PREALLOC_BLOCKS; 874 } else if ((laarr[i].extLength >> 30) == 875 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { 876 length += (((laarr[i].extLength & 877 UDF_EXTENT_LENGTH_MASK) + 878 inode->i_sb->s_blocksize - 1) >> 879 inode->i_sb->s_blocksize_bits); 880 } else 881 break; 882 } 883 884 if (length) { 885 int next = laarr[start].extLocation.logicalBlockNum + 886 (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + 887 inode->i_sb->s_blocksize - 1) >> 888 inode->i_sb->s_blocksize_bits); 889 int numalloc = udf_prealloc_blocks(inode->i_sb, inode, 890 laarr[start].extLocation.partitionReferenceNum, 891 next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? 892 length : UDF_DEFAULT_PREALLOC_BLOCKS) - 893 currlength); 894 if (numalloc) { 895 if (start == (c + 1)) 896 laarr[start].extLength += 897 (numalloc << 898 inode->i_sb->s_blocksize_bits); 899 else { 900 memmove(&laarr[c + 2], &laarr[c + 1], 901 sizeof(struct long_ad) * (*endnum - (c + 1))); 902 (*endnum)++; 903 laarr[c + 1].extLocation.logicalBlockNum = next; 904 laarr[c + 1].extLocation.partitionReferenceNum = 905 laarr[c].extLocation. 906 partitionReferenceNum; 907 laarr[c + 1].extLength = 908 EXT_NOT_RECORDED_ALLOCATED | 909 (numalloc << 910 inode->i_sb->s_blocksize_bits); 911 start = c + 1; 912 } 913 914 for (i = start + 1; numalloc && i < *endnum; i++) { 915 int elen = ((laarr[i].extLength & 916 UDF_EXTENT_LENGTH_MASK) + 917 inode->i_sb->s_blocksize - 1) >> 918 inode->i_sb->s_blocksize_bits; 919 920 if (elen > numalloc) { 921 laarr[i].extLength -= 922 (numalloc << 923 inode->i_sb->s_blocksize_bits); 924 numalloc = 0; 925 } else { 926 numalloc -= elen; 927 if (*endnum > (i + 1)) 928 memmove(&laarr[i], 929 &laarr[i + 1], 930 sizeof(struct long_ad) * 931 (*endnum - (i + 1))); 932 i--; 933 (*endnum)--; 934 } 935 } 936 UDF_I(inode)->i_lenExtents += 937 numalloc << inode->i_sb->s_blocksize_bits; 938 } 939 } 940 } 941 942 static void udf_merge_extents(struct inode *inode, 943 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], 944 int *endnum) 945 { 946 int i; 947 unsigned long blocksize = inode->i_sb->s_blocksize; 948 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; 949 950 for (i = 0; i < (*endnum - 1); i++) { 951 struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; 952 struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; 953 954 if (((li->extLength >> 30) == (lip1->extLength >> 30)) && 955 (((li->extLength >> 30) == 956 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || 957 ((lip1->extLocation.logicalBlockNum - 958 li->extLocation.logicalBlockNum) == 959 (((li->extLength & UDF_EXTENT_LENGTH_MASK) + 960 blocksize - 1) >> blocksize_bits)))) { 961 962 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + 963 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + 964 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { 965 lip1->extLength = (lip1->extLength - 966 (li->extLength & 967 UDF_EXTENT_LENGTH_MASK) + 968 UDF_EXTENT_LENGTH_MASK) & 969 ~(blocksize - 1); 970 li->extLength = (li->extLength & 971 UDF_EXTENT_FLAG_MASK) + 972 (UDF_EXTENT_LENGTH_MASK + 1) - 973 blocksize; 974 lip1->extLocation.logicalBlockNum = 975 li->extLocation.logicalBlockNum + 976 ((li->extLength & 977 UDF_EXTENT_LENGTH_MASK) >> 978 blocksize_bits); 979 } else { 980 li->extLength = lip1->extLength + 981 (((li->extLength & 982 UDF_EXTENT_LENGTH_MASK) + 983 blocksize - 1) & ~(blocksize - 1)); 984 if (*endnum > (i + 2)) 985 memmove(&laarr[i + 1], &laarr[i + 2], 986 sizeof(struct long_ad) * 987 (*endnum - (i + 2))); 988 i--; 989 (*endnum)--; 990 } 991 } else if (((li->extLength >> 30) == 992 (EXT_NOT_RECORDED_ALLOCATED >> 30)) && 993 ((lip1->extLength >> 30) == 994 (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { 995 udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, 996 ((li->extLength & 997 UDF_EXTENT_LENGTH_MASK) + 998 blocksize - 1) >> blocksize_bits); 999 li->extLocation.logicalBlockNum = 0; 1000 li->extLocation.partitionReferenceNum = 0; 1001 1002 if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + 1003 (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + 1004 blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { 1005 lip1->extLength = (lip1->extLength - 1006 (li->extLength & 1007 UDF_EXTENT_LENGTH_MASK) + 1008 UDF_EXTENT_LENGTH_MASK) & 1009 ~(blocksize - 1); 1010 li->extLength = (li->extLength & 1011 UDF_EXTENT_FLAG_MASK) + 1012 (UDF_EXTENT_LENGTH_MASK + 1) - 1013 blocksize; 1014 } else { 1015 li->extLength = lip1->extLength + 1016 (((li->extLength & 1017 UDF_EXTENT_LENGTH_MASK) + 1018 blocksize - 1) & ~(blocksize - 1)); 1019 if (*endnum > (i + 2)) 1020 memmove(&laarr[i + 1], &laarr[i + 2], 1021 sizeof(struct long_ad) * 1022 (*endnum - (i + 2))); 1023 i--; 1024 (*endnum)--; 1025 } 1026 } else if ((li->extLength >> 30) == 1027 (EXT_NOT_RECORDED_ALLOCATED >> 30)) { 1028 udf_free_blocks(inode->i_sb, inode, 1029 &li->extLocation, 0, 1030 ((li->extLength & 1031 UDF_EXTENT_LENGTH_MASK) + 1032 blocksize - 1) >> blocksize_bits); 1033 li->extLocation.logicalBlockNum = 0; 1034 li->extLocation.partitionReferenceNum = 0; 1035 li->extLength = (li->extLength & 1036 UDF_EXTENT_LENGTH_MASK) | 1037 EXT_NOT_RECORDED_NOT_ALLOCATED; 1038 } 1039 } 1040 } 1041 1042 static void udf_update_extents(struct inode *inode, 1043 struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], 1044 int startnum, int endnum, 1045 struct extent_position *epos) 1046 { 1047 int start = 0, i; 1048 struct kernel_lb_addr tmploc; 1049 uint32_t tmplen; 1050 1051 if (startnum > endnum) { 1052 for (i = 0; i < (startnum - endnum); i++) 1053 udf_delete_aext(inode, *epos, laarr[i].extLocation, 1054 laarr[i].extLength); 1055 } else if (startnum < endnum) { 1056 for (i = 0; i < (endnum - startnum); i++) { 1057 udf_insert_aext(inode, *epos, laarr[i].extLocation, 1058 laarr[i].extLength); 1059 udf_next_aext(inode, epos, &laarr[i].extLocation, 1060 &laarr[i].extLength, 1); 1061 start++; 1062 } 1063 } 1064 1065 for (i = start; i < endnum; i++) { 1066 udf_next_aext(inode, epos, &tmploc, &tmplen, 0); 1067 udf_write_aext(inode, epos, &laarr[i].extLocation, 1068 laarr[i].extLength, 1); 1069 } 1070 } 1071 1072 struct buffer_head *udf_bread(struct inode *inode, int block, 1073 int create, int *err) 1074 { 1075 struct buffer_head *bh = NULL; 1076 1077 bh = udf_getblk(inode, block, create, err); 1078 if (!bh) 1079 return NULL; 1080 1081 if (buffer_uptodate(bh)) 1082 return bh; 1083 1084 ll_rw_block(READ, 1, &bh); 1085 1086 wait_on_buffer(bh); 1087 if (buffer_uptodate(bh)) 1088 return bh; 1089 1090 brelse(bh); 1091 *err = -EIO; 1092 return NULL; 1093 } 1094 1095 int udf_setsize(struct inode *inode, loff_t newsize) 1096 { 1097 int err; 1098 struct udf_inode_info *iinfo; 1099 int bsize = 1 << inode->i_blkbits; 1100 1101 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1102 S_ISLNK(inode->i_mode))) 1103 return -EINVAL; 1104 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1105 return -EPERM; 1106 1107 iinfo = UDF_I(inode); 1108 if (newsize > inode->i_size) { 1109 down_write(&iinfo->i_data_sem); 1110 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { 1111 if (bsize < 1112 (udf_file_entry_alloc_offset(inode) + newsize)) { 1113 err = udf_expand_file_adinicb(inode); 1114 if (err) { 1115 up_write(&iinfo->i_data_sem); 1116 return err; 1117 } 1118 } else 1119 iinfo->i_lenAlloc = newsize; 1120 } 1121 err = udf_extend_file(inode, newsize); 1122 if (err) { 1123 up_write(&iinfo->i_data_sem); 1124 return err; 1125 } 1126 truncate_setsize(inode, newsize); 1127 up_write(&iinfo->i_data_sem); 1128 } else { 1129 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { 1130 down_write(&iinfo->i_data_sem); 1131 memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize, 1132 0x00, bsize - newsize - 1133 udf_file_entry_alloc_offset(inode)); 1134 iinfo->i_lenAlloc = newsize; 1135 truncate_setsize(inode, newsize); 1136 up_write(&iinfo->i_data_sem); 1137 goto update_time; 1138 } 1139 err = block_truncate_page(inode->i_mapping, newsize, 1140 udf_get_block); 1141 if (err) 1142 return err; 1143 down_write(&iinfo->i_data_sem); 1144 truncate_setsize(inode, newsize); 1145 udf_truncate_extents(inode); 1146 up_write(&iinfo->i_data_sem); 1147 } 1148 update_time: 1149 inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); 1150 if (IS_SYNC(inode)) 1151 udf_sync_inode(inode); 1152 else 1153 mark_inode_dirty(inode); 1154 return 0; 1155 } 1156 1157 static void __udf_read_inode(struct inode *inode) 1158 { 1159 struct buffer_head *bh = NULL; 1160 struct fileEntry *fe; 1161 uint16_t ident; 1162 struct udf_inode_info *iinfo = UDF_I(inode); 1163 1164 /* 1165 * Set defaults, but the inode is still incomplete! 1166 * Note: get_new_inode() sets the following on a new inode: 1167 * i_sb = sb 1168 * i_no = ino 1169 * i_flags = sb->s_flags 1170 * i_state = 0 1171 * clean_inode(): zero fills and sets 1172 * i_count = 1 1173 * i_nlink = 1 1174 * i_op = NULL; 1175 */ 1176 bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident); 1177 if (!bh) { 1178 udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino); 1179 make_bad_inode(inode); 1180 return; 1181 } 1182 1183 if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && 1184 ident != TAG_IDENT_USE) { 1185 udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n", 1186 inode->i_ino, ident); 1187 brelse(bh); 1188 make_bad_inode(inode); 1189 return; 1190 } 1191 1192 fe = (struct fileEntry *)bh->b_data; 1193 1194 if (fe->icbTag.strategyType == cpu_to_le16(4096)) { 1195 struct buffer_head *ibh; 1196 1197 ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1, 1198 &ident); 1199 if (ident == TAG_IDENT_IE && ibh) { 1200 struct buffer_head *nbh = NULL; 1201 struct kernel_lb_addr loc; 1202 struct indirectEntry *ie; 1203 1204 ie = (struct indirectEntry *)ibh->b_data; 1205 loc = lelb_to_cpu(ie->indirectICB.extLocation); 1206 1207 if (ie->indirectICB.extLength && 1208 (nbh = udf_read_ptagged(inode->i_sb, &loc, 0, 1209 &ident))) { 1210 if (ident == TAG_IDENT_FE || 1211 ident == TAG_IDENT_EFE) { 1212 memcpy(&iinfo->i_location, 1213 &loc, 1214 sizeof(struct kernel_lb_addr)); 1215 brelse(bh); 1216 brelse(ibh); 1217 brelse(nbh); 1218 __udf_read_inode(inode); 1219 return; 1220 } 1221 brelse(nbh); 1222 } 1223 } 1224 brelse(ibh); 1225 } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { 1226 udf_err(inode->i_sb, "unsupported strategy type: %d\n", 1227 le16_to_cpu(fe->icbTag.strategyType)); 1228 brelse(bh); 1229 make_bad_inode(inode); 1230 return; 1231 } 1232 udf_fill_inode(inode, bh); 1233 1234 brelse(bh); 1235 } 1236 1237 static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) 1238 { 1239 struct fileEntry *fe; 1240 struct extendedFileEntry *efe; 1241 int offset; 1242 struct udf_sb_info *sbi = UDF_SB(inode->i_sb); 1243 struct udf_inode_info *iinfo = UDF_I(inode); 1244 unsigned int link_count; 1245 1246 fe = (struct fileEntry *)bh->b_data; 1247 efe = (struct extendedFileEntry *)bh->b_data; 1248 1249 if (fe->icbTag.strategyType == cpu_to_le16(4)) 1250 iinfo->i_strat4096 = 0; 1251 else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ 1252 iinfo->i_strat4096 = 1; 1253 1254 iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & 1255 ICBTAG_FLAG_AD_MASK; 1256 iinfo->i_unique = 0; 1257 iinfo->i_lenEAttr = 0; 1258 iinfo->i_lenExtents = 0; 1259 iinfo->i_lenAlloc = 0; 1260 iinfo->i_next_alloc_block = 0; 1261 iinfo->i_next_alloc_goal = 0; 1262 if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { 1263 iinfo->i_efe = 1; 1264 iinfo->i_use = 0; 1265 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - 1266 sizeof(struct extendedFileEntry))) { 1267 make_bad_inode(inode); 1268 return; 1269 } 1270 memcpy(iinfo->i_ext.i_data, 1271 bh->b_data + sizeof(struct extendedFileEntry), 1272 inode->i_sb->s_blocksize - 1273 sizeof(struct extendedFileEntry)); 1274 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { 1275 iinfo->i_efe = 0; 1276 iinfo->i_use = 0; 1277 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - 1278 sizeof(struct fileEntry))) { 1279 make_bad_inode(inode); 1280 return; 1281 } 1282 memcpy(iinfo->i_ext.i_data, 1283 bh->b_data + sizeof(struct fileEntry), 1284 inode->i_sb->s_blocksize - sizeof(struct fileEntry)); 1285 } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { 1286 iinfo->i_efe = 0; 1287 iinfo->i_use = 1; 1288 iinfo->i_lenAlloc = le32_to_cpu( 1289 ((struct unallocSpaceEntry *)bh->b_data)-> 1290 lengthAllocDescs); 1291 if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - 1292 sizeof(struct unallocSpaceEntry))) { 1293 make_bad_inode(inode); 1294 return; 1295 } 1296 memcpy(iinfo->i_ext.i_data, 1297 bh->b_data + sizeof(struct unallocSpaceEntry), 1298 inode->i_sb->s_blocksize - 1299 sizeof(struct unallocSpaceEntry)); 1300 return; 1301 } 1302 1303 read_lock(&sbi->s_cred_lock); 1304 inode->i_uid = le32_to_cpu(fe->uid); 1305 if (inode->i_uid == -1 || 1306 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || 1307 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) 1308 inode->i_uid = UDF_SB(inode->i_sb)->s_uid; 1309 1310 inode->i_gid = le32_to_cpu(fe->gid); 1311 if (inode->i_gid == -1 || 1312 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || 1313 UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) 1314 inode->i_gid = UDF_SB(inode->i_sb)->s_gid; 1315 1316 if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && 1317 sbi->s_fmode != UDF_INVALID_MODE) 1318 inode->i_mode = sbi->s_fmode; 1319 else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && 1320 sbi->s_dmode != UDF_INVALID_MODE) 1321 inode->i_mode = sbi->s_dmode; 1322 else 1323 inode->i_mode = udf_convert_permissions(fe); 1324 inode->i_mode &= ~sbi->s_umask; 1325 read_unlock(&sbi->s_cred_lock); 1326 1327 link_count = le16_to_cpu(fe->fileLinkCount); 1328 if (!link_count) 1329 link_count = 1; 1330 set_nlink(inode, link_count); 1331 1332 inode->i_size = le64_to_cpu(fe->informationLength); 1333 iinfo->i_lenExtents = inode->i_size; 1334 1335 if (iinfo->i_efe == 0) { 1336 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << 1337 (inode->i_sb->s_blocksize_bits - 9); 1338 1339 if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime)) 1340 inode->i_atime = sbi->s_record_time; 1341 1342 if (!udf_disk_stamp_to_time(&inode->i_mtime, 1343 fe->modificationTime)) 1344 inode->i_mtime = sbi->s_record_time; 1345 1346 if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime)) 1347 inode->i_ctime = sbi->s_record_time; 1348 1349 iinfo->i_unique = le64_to_cpu(fe->uniqueID); 1350 iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); 1351 iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); 1352 offset = sizeof(struct fileEntry) + iinfo->i_lenEAttr; 1353 } else { 1354 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << 1355 (inode->i_sb->s_blocksize_bits - 9); 1356 1357 if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime)) 1358 inode->i_atime = sbi->s_record_time; 1359 1360 if (!udf_disk_stamp_to_time(&inode->i_mtime, 1361 efe->modificationTime)) 1362 inode->i_mtime = sbi->s_record_time; 1363 1364 if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime)) 1365 iinfo->i_crtime = sbi->s_record_time; 1366 1367 if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime)) 1368 inode->i_ctime = sbi->s_record_time; 1369 1370 iinfo->i_unique = le64_to_cpu(efe->uniqueID); 1371 iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); 1372 iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); 1373 offset = sizeof(struct extendedFileEntry) + 1374 iinfo->i_lenEAttr; 1375 } 1376 1377 switch (fe->icbTag.fileType) { 1378 case ICBTAG_FILE_TYPE_DIRECTORY: 1379 inode->i_op = &udf_dir_inode_operations; 1380 inode->i_fop = &udf_dir_operations; 1381 inode->i_mode |= S_IFDIR; 1382 inc_nlink(inode); 1383 break; 1384 case ICBTAG_FILE_TYPE_REALTIME: 1385 case ICBTAG_FILE_TYPE_REGULAR: 1386 case ICBTAG_FILE_TYPE_UNDEF: 1387 case ICBTAG_FILE_TYPE_VAT20: 1388 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) 1389 inode->i_data.a_ops = &udf_adinicb_aops; 1390 else 1391 inode->i_data.a_ops = &udf_aops; 1392 inode->i_op = &udf_file_inode_operations; 1393 inode->i_fop = &udf_file_operations; 1394 inode->i_mode |= S_IFREG; 1395 break; 1396 case ICBTAG_FILE_TYPE_BLOCK: 1397 inode->i_mode |= S_IFBLK; 1398 break; 1399 case ICBTAG_FILE_TYPE_CHAR: 1400 inode->i_mode |= S_IFCHR; 1401 break; 1402 case ICBTAG_FILE_TYPE_FIFO: 1403 init_special_inode(inode, inode->i_mode | S_IFIFO, 0); 1404 break; 1405 case ICBTAG_FILE_TYPE_SOCKET: 1406 init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); 1407 break; 1408 case ICBTAG_FILE_TYPE_SYMLINK: 1409 inode->i_data.a_ops = &udf_symlink_aops; 1410 inode->i_op = &udf_symlink_inode_operations; 1411 inode->i_mode = S_IFLNK | S_IRWXUGO; 1412 break; 1413 case ICBTAG_FILE_TYPE_MAIN: 1414 udf_debug("METADATA FILE-----\n"); 1415 break; 1416 case ICBTAG_FILE_TYPE_MIRROR: 1417 udf_debug("METADATA MIRROR FILE-----\n"); 1418 break; 1419 case ICBTAG_FILE_TYPE_BITMAP: 1420 udf_debug("METADATA BITMAP FILE-----\n"); 1421 break; 1422 default: 1423 udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n", 1424 inode->i_ino, fe->icbTag.fileType); 1425 make_bad_inode(inode); 1426 return; 1427 } 1428 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 1429 struct deviceSpec *dsea = 1430 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); 1431 if (dsea) { 1432 init_special_inode(inode, inode->i_mode, 1433 MKDEV(le32_to_cpu(dsea->majorDeviceIdent), 1434 le32_to_cpu(dsea->minorDeviceIdent))); 1435 /* Developer ID ??? */ 1436 } else 1437 make_bad_inode(inode); 1438 } 1439 } 1440 1441 static int udf_alloc_i_data(struct inode *inode, size_t size) 1442 { 1443 struct udf_inode_info *iinfo = UDF_I(inode); 1444 iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); 1445 1446 if (!iinfo->i_ext.i_data) { 1447 udf_err(inode->i_sb, "(ino %ld) no free memory\n", 1448 inode->i_ino); 1449 return -ENOMEM; 1450 } 1451 1452 return 0; 1453 } 1454 1455 static mode_t udf_convert_permissions(struct fileEntry *fe) 1456 { 1457 mode_t mode; 1458 uint32_t permissions; 1459 uint32_t flags; 1460 1461 permissions = le32_to_cpu(fe->permissions); 1462 flags = le16_to_cpu(fe->icbTag.flags); 1463 1464 mode = ((permissions) & S_IRWXO) | 1465 ((permissions >> 2) & S_IRWXG) | 1466 ((permissions >> 4) & S_IRWXU) | 1467 ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | 1468 ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | 1469 ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); 1470 1471 return mode; 1472 } 1473 1474 int udf_write_inode(struct inode *inode, struct writeback_control *wbc) 1475 { 1476 return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); 1477 } 1478 1479 static int udf_sync_inode(struct inode *inode) 1480 { 1481 return udf_update_inode(inode, 1); 1482 } 1483 1484 static int udf_update_inode(struct inode *inode, int do_sync) 1485 { 1486 struct buffer_head *bh = NULL; 1487 struct fileEntry *fe; 1488 struct extendedFileEntry *efe; 1489 uint32_t udfperms; 1490 uint16_t icbflags; 1491 uint16_t crclen; 1492 int err = 0; 1493 struct udf_sb_info *sbi = UDF_SB(inode->i_sb); 1494 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; 1495 struct udf_inode_info *iinfo = UDF_I(inode); 1496 1497 bh = udf_tgetblk(inode->i_sb, 1498 udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0)); 1499 if (!bh) { 1500 udf_debug("getblk failure\n"); 1501 return -ENOMEM; 1502 } 1503 1504 lock_buffer(bh); 1505 memset(bh->b_data, 0, inode->i_sb->s_blocksize); 1506 fe = (struct fileEntry *)bh->b_data; 1507 efe = (struct extendedFileEntry *)bh->b_data; 1508 1509 if (iinfo->i_use) { 1510 struct unallocSpaceEntry *use = 1511 (struct unallocSpaceEntry *)bh->b_data; 1512 1513 use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); 1514 memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), 1515 iinfo->i_ext.i_data, inode->i_sb->s_blocksize - 1516 sizeof(struct unallocSpaceEntry)); 1517 use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE); 1518 use->descTag.tagLocation = 1519 cpu_to_le32(iinfo->i_location.logicalBlockNum); 1520 crclen = sizeof(struct unallocSpaceEntry) + 1521 iinfo->i_lenAlloc - sizeof(struct tag); 1522 use->descTag.descCRCLength = cpu_to_le16(crclen); 1523 use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use + 1524 sizeof(struct tag), 1525 crclen)); 1526 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag); 1527 1528 goto out; 1529 } 1530 1531 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) 1532 fe->uid = cpu_to_le32(-1); 1533 else 1534 fe->uid = cpu_to_le32(inode->i_uid); 1535 1536 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) 1537 fe->gid = cpu_to_le32(-1); 1538 else 1539 fe->gid = cpu_to_le32(inode->i_gid); 1540 1541 udfperms = ((inode->i_mode & S_IRWXO)) | 1542 ((inode->i_mode & S_IRWXG) << 2) | 1543 ((inode->i_mode & S_IRWXU) << 4); 1544 1545 udfperms |= (le32_to_cpu(fe->permissions) & 1546 (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | 1547 FE_PERM_G_DELETE | FE_PERM_G_CHATTR | 1548 FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); 1549 fe->permissions = cpu_to_le32(udfperms); 1550 1551 if (S_ISDIR(inode->i_mode)) 1552 fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); 1553 else 1554 fe->fileLinkCount = cpu_to_le16(inode->i_nlink); 1555 1556 fe->informationLength = cpu_to_le64(inode->i_size); 1557 1558 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 1559 struct regid *eid; 1560 struct deviceSpec *dsea = 1561 (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); 1562 if (!dsea) { 1563 dsea = (struct deviceSpec *) 1564 udf_add_extendedattr(inode, 1565 sizeof(struct deviceSpec) + 1566 sizeof(struct regid), 12, 0x3); 1567 dsea->attrType = cpu_to_le32(12); 1568 dsea->attrSubtype = 1; 1569 dsea->attrLength = cpu_to_le32( 1570 sizeof(struct deviceSpec) + 1571 sizeof(struct regid)); 1572 dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); 1573 } 1574 eid = (struct regid *)dsea->impUse; 1575 memset(eid, 0, sizeof(struct regid)); 1576 strcpy(eid->ident, UDF_ID_DEVELOPER); 1577 eid->identSuffix[0] = UDF_OS_CLASS_UNIX; 1578 eid->identSuffix[1] = UDF_OS_ID_LINUX; 1579 dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); 1580 dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); 1581 } 1582 1583 if (iinfo->i_efe == 0) { 1584 memcpy(bh->b_data + sizeof(struct fileEntry), 1585 iinfo->i_ext.i_data, 1586 inode->i_sb->s_blocksize - sizeof(struct fileEntry)); 1587 fe->logicalBlocksRecorded = cpu_to_le64( 1588 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> 1589 (blocksize_bits - 9)); 1590 1591 udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); 1592 udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); 1593 udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); 1594 memset(&(fe->impIdent), 0, sizeof(struct regid)); 1595 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); 1596 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; 1597 fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; 1598 fe->uniqueID = cpu_to_le64(iinfo->i_unique); 1599 fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); 1600 fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); 1601 fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); 1602 crclen = sizeof(struct fileEntry); 1603 } else { 1604 memcpy(bh->b_data + sizeof(struct extendedFileEntry), 1605 iinfo->i_ext.i_data, 1606 inode->i_sb->s_blocksize - 1607 sizeof(struct extendedFileEntry)); 1608 efe->objectSize = cpu_to_le64(inode->i_size); 1609 efe->logicalBlocksRecorded = cpu_to_le64( 1610 (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> 1611 (blocksize_bits - 9)); 1612 1613 if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec || 1614 (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec && 1615 iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec)) 1616 iinfo->i_crtime = inode->i_atime; 1617 1618 if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec || 1619 (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec && 1620 iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec)) 1621 iinfo->i_crtime = inode->i_mtime; 1622 1623 if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec || 1624 (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec && 1625 iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec)) 1626 iinfo->i_crtime = inode->i_ctime; 1627 1628 udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); 1629 udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); 1630 udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); 1631 udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); 1632 1633 memset(&(efe->impIdent), 0, sizeof(struct regid)); 1634 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); 1635 efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; 1636 efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; 1637 efe->uniqueID = cpu_to_le64(iinfo->i_unique); 1638 efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); 1639 efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); 1640 efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); 1641 crclen = sizeof(struct extendedFileEntry); 1642 } 1643 if (iinfo->i_strat4096) { 1644 fe->icbTag.strategyType = cpu_to_le16(4096); 1645 fe->icbTag.strategyParameter = cpu_to_le16(1); 1646 fe->icbTag.numEntries = cpu_to_le16(2); 1647 } else { 1648 fe->icbTag.strategyType = cpu_to_le16(4); 1649 fe->icbTag.numEntries = cpu_to_le16(1); 1650 } 1651 1652 if (S_ISDIR(inode->i_mode)) 1653 fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; 1654 else if (S_ISREG(inode->i_mode)) 1655 fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; 1656 else if (S_ISLNK(inode->i_mode)) 1657 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; 1658 else if (S_ISBLK(inode->i_mode)) 1659 fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; 1660 else if (S_ISCHR(inode->i_mode)) 1661 fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; 1662 else if (S_ISFIFO(inode->i_mode)) 1663 fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; 1664 else if (S_ISSOCK(inode->i_mode)) 1665 fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; 1666 1667 icbflags = iinfo->i_alloc_type | 1668 ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | 1669 ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | 1670 ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | 1671 (le16_to_cpu(fe->icbTag.flags) & 1672 ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | 1673 ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); 1674 1675 fe->icbTag.flags = cpu_to_le16(icbflags); 1676 if (sbi->s_udfrev >= 0x0200) 1677 fe->descTag.descVersion = cpu_to_le16(3); 1678 else 1679 fe->descTag.descVersion = cpu_to_le16(2); 1680 fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); 1681 fe->descTag.tagLocation = cpu_to_le32( 1682 iinfo->i_location.logicalBlockNum); 1683 crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag); 1684 fe->descTag.descCRCLength = cpu_to_le16(crclen); 1685 fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), 1686 crclen)); 1687 fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); 1688 1689 out: 1690 set_buffer_uptodate(bh); 1691 unlock_buffer(bh); 1692 1693 /* write the data blocks */ 1694 mark_buffer_dirty(bh); 1695 if (do_sync) { 1696 sync_dirty_buffer(bh); 1697 if (buffer_write_io_error(bh)) { 1698 udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n", 1699 inode->i_ino); 1700 err = -EIO; 1701 } 1702 } 1703 brelse(bh); 1704 1705 return err; 1706 } 1707 1708 struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino) 1709 { 1710 unsigned long block = udf_get_lb_pblock(sb, ino, 0); 1711 struct inode *inode = iget_locked(sb, block); 1712 1713 if (!inode) 1714 return NULL; 1715 1716 if (inode->i_state & I_NEW) { 1717 memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); 1718 __udf_read_inode(inode); 1719 unlock_new_inode(inode); 1720 } 1721 1722 if (is_bad_inode(inode)) 1723 goto out_iput; 1724 1725 if (ino->logicalBlockNum >= UDF_SB(sb)-> 1726 s_partmaps[ino->partitionReferenceNum].s_partition_len) { 1727 udf_debug("block=%d, partition=%d out of range\n", 1728 ino->logicalBlockNum, ino->partitionReferenceNum); 1729 make_bad_inode(inode); 1730 goto out_iput; 1731 } 1732 1733 return inode; 1734 1735 out_iput: 1736 iput(inode); 1737 return NULL; 1738 } 1739 1740 int udf_add_aext(struct inode *inode, struct extent_position *epos, 1741 struct kernel_lb_addr *eloc, uint32_t elen, int inc) 1742 { 1743 int adsize; 1744 struct short_ad *sad = NULL; 1745 struct long_ad *lad = NULL; 1746 struct allocExtDesc *aed; 1747 uint8_t *ptr; 1748 struct udf_inode_info *iinfo = UDF_I(inode); 1749 1750 if (!epos->bh) 1751 ptr = iinfo->i_ext.i_data + epos->offset - 1752 udf_file_entry_alloc_offset(inode) + 1753 iinfo->i_lenEAttr; 1754 else 1755 ptr = epos->bh->b_data + epos->offset; 1756 1757 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 1758 adsize = sizeof(struct short_ad); 1759 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 1760 adsize = sizeof(struct long_ad); 1761 else 1762 return -EIO; 1763 1764 if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { 1765 unsigned char *sptr, *dptr; 1766 struct buffer_head *nbh; 1767 int err, loffset; 1768 struct kernel_lb_addr obloc = epos->block; 1769 1770 epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, 1771 obloc.partitionReferenceNum, 1772 obloc.logicalBlockNum, &err); 1773 if (!epos->block.logicalBlockNum) 1774 return -ENOSPC; 1775 nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, 1776 &epos->block, 1777 0)); 1778 if (!nbh) 1779 return -EIO; 1780 lock_buffer(nbh); 1781 memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); 1782 set_buffer_uptodate(nbh); 1783 unlock_buffer(nbh); 1784 mark_buffer_dirty_inode(nbh, inode); 1785 1786 aed = (struct allocExtDesc *)(nbh->b_data); 1787 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) 1788 aed->previousAllocExtLocation = 1789 cpu_to_le32(obloc.logicalBlockNum); 1790 if (epos->offset + adsize > inode->i_sb->s_blocksize) { 1791 loffset = epos->offset; 1792 aed->lengthAllocDescs = cpu_to_le32(adsize); 1793 sptr = ptr - adsize; 1794 dptr = nbh->b_data + sizeof(struct allocExtDesc); 1795 memcpy(dptr, sptr, adsize); 1796 epos->offset = sizeof(struct allocExtDesc) + adsize; 1797 } else { 1798 loffset = epos->offset + adsize; 1799 aed->lengthAllocDescs = cpu_to_le32(0); 1800 sptr = ptr; 1801 epos->offset = sizeof(struct allocExtDesc); 1802 1803 if (epos->bh) { 1804 aed = (struct allocExtDesc *)epos->bh->b_data; 1805 le32_add_cpu(&aed->lengthAllocDescs, adsize); 1806 } else { 1807 iinfo->i_lenAlloc += adsize; 1808 mark_inode_dirty(inode); 1809 } 1810 } 1811 if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200) 1812 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, 1813 epos->block.logicalBlockNum, sizeof(struct tag)); 1814 else 1815 udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, 1816 epos->block.logicalBlockNum, sizeof(struct tag)); 1817 switch (iinfo->i_alloc_type) { 1818 case ICBTAG_FLAG_AD_SHORT: 1819 sad = (struct short_ad *)sptr; 1820 sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | 1821 inode->i_sb->s_blocksize); 1822 sad->extPosition = 1823 cpu_to_le32(epos->block.logicalBlockNum); 1824 break; 1825 case ICBTAG_FLAG_AD_LONG: 1826 lad = (struct long_ad *)sptr; 1827 lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | 1828 inode->i_sb->s_blocksize); 1829 lad->extLocation = cpu_to_lelb(epos->block); 1830 memset(lad->impUse, 0x00, sizeof(lad->impUse)); 1831 break; 1832 } 1833 if (epos->bh) { 1834 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || 1835 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) 1836 udf_update_tag(epos->bh->b_data, loffset); 1837 else 1838 udf_update_tag(epos->bh->b_data, 1839 sizeof(struct allocExtDesc)); 1840 mark_buffer_dirty_inode(epos->bh, inode); 1841 brelse(epos->bh); 1842 } else { 1843 mark_inode_dirty(inode); 1844 } 1845 epos->bh = nbh; 1846 } 1847 1848 udf_write_aext(inode, epos, eloc, elen, inc); 1849 1850 if (!epos->bh) { 1851 iinfo->i_lenAlloc += adsize; 1852 mark_inode_dirty(inode); 1853 } else { 1854 aed = (struct allocExtDesc *)epos->bh->b_data; 1855 le32_add_cpu(&aed->lengthAllocDescs, adsize); 1856 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || 1857 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) 1858 udf_update_tag(epos->bh->b_data, 1859 epos->offset + (inc ? 0 : adsize)); 1860 else 1861 udf_update_tag(epos->bh->b_data, 1862 sizeof(struct allocExtDesc)); 1863 mark_buffer_dirty_inode(epos->bh, inode); 1864 } 1865 1866 return 0; 1867 } 1868 1869 void udf_write_aext(struct inode *inode, struct extent_position *epos, 1870 struct kernel_lb_addr *eloc, uint32_t elen, int inc) 1871 { 1872 int adsize; 1873 uint8_t *ptr; 1874 struct short_ad *sad; 1875 struct long_ad *lad; 1876 struct udf_inode_info *iinfo = UDF_I(inode); 1877 1878 if (!epos->bh) 1879 ptr = iinfo->i_ext.i_data + epos->offset - 1880 udf_file_entry_alloc_offset(inode) + 1881 iinfo->i_lenEAttr; 1882 else 1883 ptr = epos->bh->b_data + epos->offset; 1884 1885 switch (iinfo->i_alloc_type) { 1886 case ICBTAG_FLAG_AD_SHORT: 1887 sad = (struct short_ad *)ptr; 1888 sad->extLength = cpu_to_le32(elen); 1889 sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); 1890 adsize = sizeof(struct short_ad); 1891 break; 1892 case ICBTAG_FLAG_AD_LONG: 1893 lad = (struct long_ad *)ptr; 1894 lad->extLength = cpu_to_le32(elen); 1895 lad->extLocation = cpu_to_lelb(*eloc); 1896 memset(lad->impUse, 0x00, sizeof(lad->impUse)); 1897 adsize = sizeof(struct long_ad); 1898 break; 1899 default: 1900 return; 1901 } 1902 1903 if (epos->bh) { 1904 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || 1905 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { 1906 struct allocExtDesc *aed = 1907 (struct allocExtDesc *)epos->bh->b_data; 1908 udf_update_tag(epos->bh->b_data, 1909 le32_to_cpu(aed->lengthAllocDescs) + 1910 sizeof(struct allocExtDesc)); 1911 } 1912 mark_buffer_dirty_inode(epos->bh, inode); 1913 } else { 1914 mark_inode_dirty(inode); 1915 } 1916 1917 if (inc) 1918 epos->offset += adsize; 1919 } 1920 1921 int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, 1922 struct kernel_lb_addr *eloc, uint32_t *elen, int inc) 1923 { 1924 int8_t etype; 1925 1926 while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == 1927 (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { 1928 int block; 1929 epos->block = *eloc; 1930 epos->offset = sizeof(struct allocExtDesc); 1931 brelse(epos->bh); 1932 block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); 1933 epos->bh = udf_tread(inode->i_sb, block); 1934 if (!epos->bh) { 1935 udf_debug("reading block %d failed!\n", block); 1936 return -1; 1937 } 1938 } 1939 1940 return etype; 1941 } 1942 1943 int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, 1944 struct kernel_lb_addr *eloc, uint32_t *elen, int inc) 1945 { 1946 int alen; 1947 int8_t etype; 1948 uint8_t *ptr; 1949 struct short_ad *sad; 1950 struct long_ad *lad; 1951 struct udf_inode_info *iinfo = UDF_I(inode); 1952 1953 if (!epos->bh) { 1954 if (!epos->offset) 1955 epos->offset = udf_file_entry_alloc_offset(inode); 1956 ptr = iinfo->i_ext.i_data + epos->offset - 1957 udf_file_entry_alloc_offset(inode) + 1958 iinfo->i_lenEAttr; 1959 alen = udf_file_entry_alloc_offset(inode) + 1960 iinfo->i_lenAlloc; 1961 } else { 1962 if (!epos->offset) 1963 epos->offset = sizeof(struct allocExtDesc); 1964 ptr = epos->bh->b_data + epos->offset; 1965 alen = sizeof(struct allocExtDesc) + 1966 le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> 1967 lengthAllocDescs); 1968 } 1969 1970 switch (iinfo->i_alloc_type) { 1971 case ICBTAG_FLAG_AD_SHORT: 1972 sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); 1973 if (!sad) 1974 return -1; 1975 etype = le32_to_cpu(sad->extLength) >> 30; 1976 eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); 1977 eloc->partitionReferenceNum = 1978 iinfo->i_location.partitionReferenceNum; 1979 *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; 1980 break; 1981 case ICBTAG_FLAG_AD_LONG: 1982 lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); 1983 if (!lad) 1984 return -1; 1985 etype = le32_to_cpu(lad->extLength) >> 30; 1986 *eloc = lelb_to_cpu(lad->extLocation); 1987 *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; 1988 break; 1989 default: 1990 udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type); 1991 return -1; 1992 } 1993 1994 return etype; 1995 } 1996 1997 static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, 1998 struct kernel_lb_addr neloc, uint32_t nelen) 1999 { 2000 struct kernel_lb_addr oeloc; 2001 uint32_t oelen; 2002 int8_t etype; 2003 2004 if (epos.bh) 2005 get_bh(epos.bh); 2006 2007 while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { 2008 udf_write_aext(inode, &epos, &neloc, nelen, 1); 2009 neloc = oeloc; 2010 nelen = (etype << 30) | oelen; 2011 } 2012 udf_add_aext(inode, &epos, &neloc, nelen, 1); 2013 brelse(epos.bh); 2014 2015 return (nelen >> 30); 2016 } 2017 2018 int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, 2019 struct kernel_lb_addr eloc, uint32_t elen) 2020 { 2021 struct extent_position oepos; 2022 int adsize; 2023 int8_t etype; 2024 struct allocExtDesc *aed; 2025 struct udf_inode_info *iinfo; 2026 2027 if (epos.bh) { 2028 get_bh(epos.bh); 2029 get_bh(epos.bh); 2030 } 2031 2032 iinfo = UDF_I(inode); 2033 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) 2034 adsize = sizeof(struct short_ad); 2035 else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) 2036 adsize = sizeof(struct long_ad); 2037 else 2038 adsize = 0; 2039 2040 oepos = epos; 2041 if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) 2042 return -1; 2043 2044 while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { 2045 udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); 2046 if (oepos.bh != epos.bh) { 2047 oepos.block = epos.block; 2048 brelse(oepos.bh); 2049 get_bh(epos.bh); 2050 oepos.bh = epos.bh; 2051 oepos.offset = epos.offset - adsize; 2052 } 2053 } 2054 memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); 2055 elen = 0; 2056 2057 if (epos.bh != oepos.bh) { 2058 udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); 2059 udf_write_aext(inode, &oepos, &eloc, elen, 1); 2060 udf_write_aext(inode, &oepos, &eloc, elen, 1); 2061 if (!oepos.bh) { 2062 iinfo->i_lenAlloc -= (adsize * 2); 2063 mark_inode_dirty(inode); 2064 } else { 2065 aed = (struct allocExtDesc *)oepos.bh->b_data; 2066 le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); 2067 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || 2068 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) 2069 udf_update_tag(oepos.bh->b_data, 2070 oepos.offset - (2 * adsize)); 2071 else 2072 udf_update_tag(oepos.bh->b_data, 2073 sizeof(struct allocExtDesc)); 2074 mark_buffer_dirty_inode(oepos.bh, inode); 2075 } 2076 } else { 2077 udf_write_aext(inode, &oepos, &eloc, elen, 1); 2078 if (!oepos.bh) { 2079 iinfo->i_lenAlloc -= adsize; 2080 mark_inode_dirty(inode); 2081 } else { 2082 aed = (struct allocExtDesc *)oepos.bh->b_data; 2083 le32_add_cpu(&aed->lengthAllocDescs, -adsize); 2084 if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || 2085 UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) 2086 udf_update_tag(oepos.bh->b_data, 2087 epos.offset - adsize); 2088 else 2089 udf_update_tag(oepos.bh->b_data, 2090 sizeof(struct allocExtDesc)); 2091 mark_buffer_dirty_inode(oepos.bh, inode); 2092 } 2093 } 2094 2095 brelse(epos.bh); 2096 brelse(oepos.bh); 2097 2098 return (elen >> 30); 2099 } 2100 2101 int8_t inode_bmap(struct inode *inode, sector_t block, 2102 struct extent_position *pos, struct kernel_lb_addr *eloc, 2103 uint32_t *elen, sector_t *offset) 2104 { 2105 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; 2106 loff_t lbcount = 0, bcount = 2107 (loff_t) block << blocksize_bits; 2108 int8_t etype; 2109 struct udf_inode_info *iinfo; 2110 2111 iinfo = UDF_I(inode); 2112 pos->offset = 0; 2113 pos->block = iinfo->i_location; 2114 pos->bh = NULL; 2115 *elen = 0; 2116 2117 do { 2118 etype = udf_next_aext(inode, pos, eloc, elen, 1); 2119 if (etype == -1) { 2120 *offset = (bcount - lbcount) >> blocksize_bits; 2121 iinfo->i_lenExtents = lbcount; 2122 return -1; 2123 } 2124 lbcount += *elen; 2125 } while (lbcount <= bcount); 2126 2127 *offset = (bcount + *elen - lbcount) >> blocksize_bits; 2128 2129 return etype; 2130 } 2131 2132 long udf_block_map(struct inode *inode, sector_t block) 2133 { 2134 struct kernel_lb_addr eloc; 2135 uint32_t elen; 2136 sector_t offset; 2137 struct extent_position epos = {}; 2138 int ret; 2139 2140 down_read(&UDF_I(inode)->i_data_sem); 2141 2142 if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == 2143 (EXT_RECORDED_ALLOCATED >> 30)) 2144 ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset); 2145 else 2146 ret = 0; 2147 2148 up_read(&UDF_I(inode)->i_data_sem); 2149 brelse(epos.bh); 2150 2151 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) 2152 return udf_fixed_to_variable(ret); 2153 else 2154 return ret; 2155 } 2156