1 /* 2 * pass1b.c --- Pass #1b of e2fsck 3 * 4 * This file contains pass1B, pass1C, and pass1D of e2fsck. They are 5 * only invoked if pass 1 discovered blocks which are in use by more 6 * than one inode. 7 * 8 * Pass1B scans the data blocks of all the inodes again, generating a 9 * complete list of duplicate blocks and which inodes have claimed 10 * them. 11 * 12 * Pass1C does a tree-traversal of the filesystem, to determine the 13 * parent directories of these inodes. This step is necessary so that 14 * e2fsck can print out the pathnames of affected inodes. 15 * 16 * Pass1D is a reconciliation pass. For each inode with duplicate 17 * blocks, the user is prompted if s/he would like to clone the file 18 * (so that the file gets a fresh copy of the duplicated blocks) or 19 * simply to delete the file. 20 * 21 * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o. 22 * 23 * %Begin-Header% 24 * This file may be redistributed under the terms of the GNU Public 25 * License. 26 * %End-Header% 27 * 28 */ 29 30 #include <time.h> 31 #ifdef HAVE_ERRNO_H 32 #include <errno.h> 33 #endif 34 35 #ifdef HAVE_INTTYPES_H 36 #include <inttypes.h> 37 #endif 38 39 #ifndef HAVE_INTPTR_T 40 typedef long intptr_t; 41 #endif 42 43 /* Needed for architectures where sizeof(int) != sizeof(void *) */ 44 #define INT_TO_VOIDPTR(val) ((void *)(intptr_t)(val)) 45 #define VOIDPTR_TO_INT(ptr) ((int)(intptr_t)(ptr)) 46 47 #include <et/com_err.h> 48 #include "e2fsck.h" 49 50 #include "problem.h" 51 #include "dict.h" 52 53 /* Define an extension to the ext2 library's block count information */ 54 #define BLOCK_COUNT_EXTATTR (-5) 55 56 struct block_el { 57 blk_t block; 58 struct block_el *next; 59 }; 60 61 struct inode_el { 62 ext2_ino_t inode; 63 struct inode_el *next; 64 }; 65 66 struct dup_block { 67 int num_bad; 68 struct inode_el *inode_list; 69 }; 70 71 /* 72 * This structure stores information about a particular inode which 73 * is sharing blocks with other inodes. This information is collected 74 * to display to the user, so that the user knows what files he or she 75 * is dealing with, when trying to decide how to resolve the conflict 76 * of multiply-claimed blocks. 77 */ 78 struct dup_inode { 79 ext2_ino_t dir; 80 int num_dupblocks; 81 struct ext2_inode inode; 82 struct block_el *block_list; 83 }; 84 85 static int process_pass1b_block(ext2_filsys fs, blk_t *blocknr, 86 e2_blkcnt_t blockcnt, blk_t ref_blk, 87 int ref_offset, void *priv_data); 88 static void delete_file(e2fsck_t ctx, ext2_ino_t ino, 89 struct dup_inode *dp, char *block_buf); 90 static int clone_file(e2fsck_t ctx, ext2_ino_t ino, 91 struct dup_inode *dp, char* block_buf); 92 static int check_if_fs_block(e2fsck_t ctx, blk_t test_blk); 93 94 static void pass1b(e2fsck_t ctx, char *block_buf); 95 static void pass1c(e2fsck_t ctx, char *block_buf); 96 static void pass1d(e2fsck_t ctx, char *block_buf); 97 98 static int dup_inode_count = 0; 99 static int dup_inode_founddir = 0; 100 101 static dict_t blk_dict, ino_dict; 102 103 static ext2fs_inode_bitmap inode_dup_map; 104 105 static int dict_int_cmp(const void *a, const void *b) 106 { 107 intptr_t ia, ib; 108 109 ia = (intptr_t)a; 110 ib = (intptr_t)b; 111 112 return (ia-ib); 113 } 114 115 /* 116 * Add a duplicate block record 117 */ 118 static void add_dupe(e2fsck_t ctx, ext2_ino_t ino, blk_t blk, 119 struct ext2_inode *inode) 120 { 121 dnode_t *n; 122 struct dup_block *db; 123 struct dup_inode *di; 124 struct block_el *blk_el; 125 struct inode_el *ino_el; 126 127 n = dict_lookup(&blk_dict, INT_TO_VOIDPTR(blk)); 128 if (n) 129 db = (struct dup_block *) dnode_get(n); 130 else { 131 db = (struct dup_block *) e2fsck_allocate_memory(ctx, 132 sizeof(struct dup_block), "duplicate block header"); 133 db->num_bad = 0; 134 db->inode_list = 0; 135 dict_alloc_insert(&blk_dict, INT_TO_VOIDPTR(blk), db); 136 } 137 ino_el = (struct inode_el *) e2fsck_allocate_memory(ctx, 138 sizeof(struct inode_el), "inode element"); 139 ino_el->inode = ino; 140 ino_el->next = db->inode_list; 141 db->inode_list = ino_el; 142 db->num_bad++; 143 144 n = dict_lookup(&ino_dict, INT_TO_VOIDPTR(ino)); 145 if (n) 146 di = (struct dup_inode *) dnode_get(n); 147 else { 148 di = (struct dup_inode *) e2fsck_allocate_memory(ctx, 149 sizeof(struct dup_inode), "duplicate inode header"); 150 if (ino == EXT2_ROOT_INO) { 151 di->dir = EXT2_ROOT_INO; 152 dup_inode_founddir++; 153 } else 154 di->dir = 0; 155 156 di->num_dupblocks = 0; 157 di->block_list = 0; 158 di->inode = *inode; 159 dict_alloc_insert(&ino_dict, INT_TO_VOIDPTR(ino), di); 160 } 161 blk_el = (struct block_el *) e2fsck_allocate_memory(ctx, 162 sizeof(struct block_el), "block element"); 163 blk_el->block = blk; 164 blk_el->next = di->block_list; 165 di->block_list = blk_el; 166 di->num_dupblocks++; 167 } 168 169 /* 170 * Free a duplicate inode record 171 */ 172 static void inode_dnode_free(dnode_t *node, 173 void *context EXT2FS_ATTR((unused))) 174 { 175 struct dup_inode *di; 176 struct block_el *p, *next; 177 178 di = (struct dup_inode *) dnode_get(node); 179 for (p = di->block_list; p; p = next) { 180 next = p->next; 181 free(p); 182 } 183 free(di); 184 free(node); 185 } 186 187 /* 188 * Free a duplicate block record 189 */ 190 static void block_dnode_free(dnode_t *node, 191 void *context EXT2FS_ATTR((unused))) 192 { 193 struct dup_block *db; 194 struct inode_el *p, *next; 195 196 db = (struct dup_block *) dnode_get(node); 197 for (p = db->inode_list; p; p = next) { 198 next = p->next; 199 free(p); 200 } 201 free(db); 202 free(node); 203 } 204 205 206 /* 207 * Main procedure for handling duplicate blocks 208 */ 209 void e2fsck_pass1_dupblocks(e2fsck_t ctx, char *block_buf) 210 { 211 ext2_filsys fs = ctx->fs; 212 struct problem_context pctx; 213 #ifdef RESOURCE_TRACK 214 struct resource_track rtrack; 215 #endif 216 217 clear_problem_context(&pctx); 218 219 pctx.errcode = ext2fs_allocate_inode_bitmap(fs, 220 _("multiply claimed inode map"), &inode_dup_map); 221 if (pctx.errcode) { 222 fix_problem(ctx, PR_1B_ALLOCATE_IBITMAP_ERROR, &pctx); 223 ctx->flags |= E2F_FLAG_ABORT; 224 return; 225 } 226 227 dict_init(&ino_dict, DICTCOUNT_T_MAX, dict_int_cmp); 228 dict_init(&blk_dict, DICTCOUNT_T_MAX, dict_int_cmp); 229 dict_set_allocator(&ino_dict, NULL, inode_dnode_free, NULL); 230 dict_set_allocator(&blk_dict, NULL, block_dnode_free, NULL); 231 232 init_resource_track(&rtrack, ctx->fs->io); 233 pass1b(ctx, block_buf); 234 print_resource_track(ctx, "Pass 1b", &rtrack, ctx->fs->io); 235 236 init_resource_track(&rtrack, ctx->fs->io); 237 pass1c(ctx, block_buf); 238 print_resource_track(ctx, "Pass 1c", &rtrack, ctx->fs->io); 239 240 init_resource_track(&rtrack, ctx->fs->io); 241 pass1d(ctx, block_buf); 242 print_resource_track(ctx, "Pass 1d", &rtrack, ctx->fs->io); 243 244 /* 245 * Time to free all of the accumulated data structures that we 246 * don't need anymore. 247 */ 248 dict_free_nodes(&ino_dict); 249 dict_free_nodes(&blk_dict); 250 ext2fs_free_inode_bitmap(inode_dup_map); 251 } 252 253 /* 254 * Scan the inodes looking for inodes that contain duplicate blocks. 255 */ 256 struct process_block_struct { 257 e2fsck_t ctx; 258 ext2_ino_t ino; 259 int dup_blocks; 260 struct ext2_inode *inode; 261 struct problem_context *pctx; 262 }; 263 264 static void pass1b(e2fsck_t ctx, char *block_buf) 265 { 266 ext2_filsys fs = ctx->fs; 267 ext2_ino_t ino; 268 struct ext2_inode inode; 269 ext2_inode_scan scan; 270 struct process_block_struct pb; 271 struct problem_context pctx; 272 273 clear_problem_context(&pctx); 274 275 if (!(ctx->options & E2F_OPT_PREEN)) 276 fix_problem(ctx, PR_1B_PASS_HEADER, &pctx); 277 pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks, 278 &scan); 279 if (pctx.errcode) { 280 fix_problem(ctx, PR_1B_ISCAN_ERROR, &pctx); 281 ctx->flags |= E2F_FLAG_ABORT; 282 return; 283 } 284 ctx->stashed_inode = &inode; 285 pb.ctx = ctx; 286 pb.pctx = &pctx; 287 pctx.str = "pass1b"; 288 while (1) { 289 pctx.errcode = ext2fs_get_next_inode(scan, &ino, &inode); 290 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) 291 continue; 292 if (pctx.errcode) { 293 fix_problem(ctx, PR_1B_ISCAN_ERROR, &pctx); 294 ctx->flags |= E2F_FLAG_ABORT; 295 return; 296 } 297 if (!ino) 298 break; 299 pctx.ino = ctx->stashed_ino = ino; 300 if ((ino != EXT2_BAD_INO) && 301 !ext2fs_test_inode_bitmap(ctx->inode_used_map, ino)) 302 continue; 303 304 pb.ino = ino; 305 pb.dup_blocks = 0; 306 pb.inode = &inode; 307 308 if (ext2fs_inode_has_valid_blocks(&inode) || 309 (ino == EXT2_BAD_INO)) 310 pctx.errcode = ext2fs_block_iterate2(fs, ino, 311 BLOCK_FLAG_READ_ONLY, block_buf, 312 process_pass1b_block, &pb); 313 if (inode.i_file_acl) 314 process_pass1b_block(fs, &inode.i_file_acl, 315 BLOCK_COUNT_EXTATTR, 0, 0, &pb); 316 if (pb.dup_blocks) { 317 end_problem_latch(ctx, PR_LATCH_DBLOCK); 318 if (ino >= EXT2_FIRST_INODE(fs->super) || 319 ino == EXT2_ROOT_INO) 320 dup_inode_count++; 321 } 322 if (pctx.errcode) 323 fix_problem(ctx, PR_1B_BLOCK_ITERATE, &pctx); 324 } 325 ext2fs_close_inode_scan(scan); 326 e2fsck_use_inode_shortcuts(ctx, 0); 327 } 328 329 static int process_pass1b_block(ext2_filsys fs EXT2FS_ATTR((unused)), 330 blk_t *block_nr, 331 e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)), 332 blk_t ref_blk EXT2FS_ATTR((unused)), 333 int ref_offset EXT2FS_ATTR((unused)), 334 void *priv_data) 335 { 336 struct process_block_struct *p; 337 e2fsck_t ctx; 338 339 if (HOLE_BLKADDR(*block_nr)) 340 return 0; 341 p = (struct process_block_struct *) priv_data; 342 ctx = p->ctx; 343 344 if (!ext2fs_test_block_bitmap(ctx->block_dup_map, *block_nr)) 345 return 0; 346 347 /* OK, this is a duplicate block */ 348 if (p->ino != EXT2_BAD_INO) { 349 p->pctx->blk = *block_nr; 350 fix_problem(ctx, PR_1B_DUP_BLOCK, p->pctx); 351 } 352 p->dup_blocks++; 353 ext2fs_mark_inode_bitmap(inode_dup_map, p->ino); 354 355 add_dupe(ctx, p->ino, *block_nr, p->inode); 356 357 return 0; 358 } 359 360 /* 361 * Pass 1c: Scan directories for inodes with duplicate blocks. This 362 * is used so that we can print pathnames when prompting the user for 363 * what to do. 364 */ 365 struct search_dir_struct { 366 int count; 367 ext2_ino_t first_inode; 368 ext2_ino_t max_inode; 369 }; 370 371 static int search_dirent_proc(ext2_ino_t dir, int entry, 372 struct ext2_dir_entry *dirent, 373 int offset EXT2FS_ATTR((unused)), 374 int blocksize EXT2FS_ATTR((unused)), 375 char *buf EXT2FS_ATTR((unused)), 376 void *priv_data) 377 { 378 struct search_dir_struct *sd; 379 struct dup_inode *p; 380 dnode_t *n; 381 382 sd = (struct search_dir_struct *) priv_data; 383 384 if (dirent->inode > sd->max_inode) 385 /* Should abort this inode, but not everything */ 386 return 0; 387 388 if ((dirent->inode < sd->first_inode) || (entry < DIRENT_OTHER_FILE) || 389 !ext2fs_test_inode_bitmap(inode_dup_map, dirent->inode)) 390 return 0; 391 392 n = dict_lookup(&ino_dict, INT_TO_VOIDPTR(dirent->inode)); 393 if (!n) 394 return 0; 395 p = (struct dup_inode *) dnode_get(n); 396 if (!p->dir) { 397 p->dir = dir; 398 sd->count--; 399 } 400 401 return(sd->count ? 0 : DIRENT_ABORT); 402 } 403 404 405 static void pass1c(e2fsck_t ctx, char *block_buf) 406 { 407 ext2_filsys fs = ctx->fs; 408 struct search_dir_struct sd; 409 struct problem_context pctx; 410 411 clear_problem_context(&pctx); 412 413 if (!(ctx->options & E2F_OPT_PREEN)) 414 fix_problem(ctx, PR_1C_PASS_HEADER, &pctx); 415 416 /* 417 * Search through all directories to translate inodes to names 418 * (by searching for the containing directory for that inode.) 419 */ 420 sd.count = dup_inode_count - dup_inode_founddir; 421 sd.first_inode = EXT2_FIRST_INODE(fs->super); 422 sd.max_inode = fs->super->s_inodes_count; 423 ext2fs_dblist_dir_iterate(fs->dblist, 0, block_buf, 424 search_dirent_proc, &sd); 425 } 426 427 static void pass1d(e2fsck_t ctx, char *block_buf) 428 { 429 ext2_filsys fs = ctx->fs; 430 struct dup_inode *p, *t; 431 struct dup_block *q; 432 ext2_ino_t *shared, ino; 433 int shared_len; 434 int i; 435 int file_ok; 436 int meta_data = 0; 437 struct problem_context pctx; 438 dnode_t *n, *m; 439 struct block_el *s; 440 struct inode_el *r; 441 442 clear_problem_context(&pctx); 443 444 if (!(ctx->options & E2F_OPT_PREEN)) 445 fix_problem(ctx, PR_1D_PASS_HEADER, &pctx); 446 e2fsck_read_bitmaps(ctx); 447 448 pctx.num = dup_inode_count; /* dict_count(&ino_dict); */ 449 fix_problem(ctx, PR_1D_NUM_DUP_INODES, &pctx); 450 shared = (ext2_ino_t *) e2fsck_allocate_memory(ctx, 451 sizeof(ext2_ino_t) * dict_count(&ino_dict), 452 "Shared inode list"); 453 for (n = dict_first(&ino_dict); n; n = dict_next(&ino_dict, n)) { 454 p = (struct dup_inode *) dnode_get(n); 455 shared_len = 0; 456 file_ok = 1; 457 ino = (ext2_ino_t)VOIDPTR_TO_INT(dnode_getkey(n)); 458 if (ino == EXT2_BAD_INO || ino == EXT2_RESIZE_INO) 459 continue; 460 461 /* 462 * Find all of the inodes which share blocks with this 463 * one. First we find all of the duplicate blocks 464 * belonging to this inode, and then search each block 465 * get the list of inodes, and merge them together. 466 */ 467 for (s = p->block_list; s; s = s->next) { 468 m = dict_lookup(&blk_dict, INT_TO_VOIDPTR(s->block)); 469 if (!m) 470 continue; /* Should never happen... */ 471 q = (struct dup_block *) dnode_get(m); 472 if (q->num_bad > 1) 473 file_ok = 0; 474 if (check_if_fs_block(ctx, s->block)) { 475 file_ok = 0; 476 meta_data = 1; 477 } 478 479 /* 480 * Add all inodes used by this block to the 481 * shared[] --- which is a unique list, so 482 * if an inode is already in shared[], don't 483 * add it again. 484 */ 485 for (r = q->inode_list; r; r = r->next) { 486 if (r->inode == ino) 487 continue; 488 for (i = 0; i < shared_len; i++) 489 if (shared[i] == r->inode) 490 break; 491 if (i == shared_len) { 492 shared[shared_len++] = r->inode; 493 } 494 } 495 } 496 497 /* 498 * Report the inode that we are working on 499 */ 500 pctx.inode = &p->inode; 501 pctx.ino = ino; 502 pctx.dir = p->dir; 503 pctx.blkcount = p->num_dupblocks; 504 pctx.num = meta_data ? shared_len+1 : shared_len; 505 fix_problem(ctx, PR_1D_DUP_FILE, &pctx); 506 pctx.blkcount = 0; 507 pctx.num = 0; 508 509 if (meta_data) 510 fix_problem(ctx, PR_1D_SHARE_METADATA, &pctx); 511 512 for (i = 0; i < shared_len; i++) { 513 m = dict_lookup(&ino_dict, INT_TO_VOIDPTR(shared[i])); 514 if (!m) 515 continue; /* should never happen */ 516 t = (struct dup_inode *) dnode_get(m); 517 /* 518 * Report the inode that we are sharing with 519 */ 520 pctx.inode = &t->inode; 521 pctx.ino = shared[i]; 522 pctx.dir = t->dir; 523 fix_problem(ctx, PR_1D_DUP_FILE_LIST, &pctx); 524 } 525 if (file_ok) { 526 fix_problem(ctx, PR_1D_DUP_BLOCKS_DEALT, &pctx); 527 continue; 528 } 529 if (fix_problem(ctx, PR_1D_CLONE_QUESTION, &pctx)) { 530 pctx.errcode = clone_file(ctx, ino, p, block_buf); 531 if (pctx.errcode) 532 fix_problem(ctx, PR_1D_CLONE_ERROR, &pctx); 533 else 534 continue; 535 } 536 if (fix_problem(ctx, PR_1D_DELETE_QUESTION, &pctx)) 537 delete_file(ctx, ino, p, block_buf); 538 else 539 ext2fs_unmark_valid(fs); 540 } 541 ext2fs_free_mem(&shared); 542 } 543 544 /* 545 * Drop the refcount on the dup_block structure, and clear the entry 546 * in the block_dup_map if appropriate. 547 */ 548 static void decrement_badcount(e2fsck_t ctx, blk_t block, struct dup_block *p) 549 { 550 p->num_bad--; 551 if (p->num_bad <= 0 || 552 (p->num_bad == 1 && !check_if_fs_block(ctx, block))) 553 ext2fs_unmark_block_bitmap(ctx->block_dup_map, block); 554 } 555 556 static int delete_file_block(ext2_filsys fs, 557 blk_t *block_nr, 558 e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)), 559 blk_t ref_block EXT2FS_ATTR((unused)), 560 int ref_offset EXT2FS_ATTR((unused)), 561 void *priv_data) 562 { 563 struct process_block_struct *pb; 564 struct dup_block *p; 565 dnode_t *n; 566 e2fsck_t ctx; 567 568 pb = (struct process_block_struct *) priv_data; 569 ctx = pb->ctx; 570 571 if (HOLE_BLKADDR(*block_nr)) 572 return 0; 573 574 if (ext2fs_test_block_bitmap(ctx->block_dup_map, *block_nr)) { 575 n = dict_lookup(&blk_dict, INT_TO_VOIDPTR(*block_nr)); 576 if (n) { 577 p = (struct dup_block *) dnode_get(n); 578 decrement_badcount(ctx, *block_nr, p); 579 } else 580 com_err("delete_file_block", 0, 581 _("internal error: can't find dup_blk for %u\n"), 582 *block_nr); 583 } else { 584 ext2fs_unmark_block_bitmap(ctx->block_found_map, *block_nr); 585 ext2fs_block_alloc_stats(fs, *block_nr, -1); 586 } 587 588 return 0; 589 } 590 591 static void delete_file(e2fsck_t ctx, ext2_ino_t ino, 592 struct dup_inode *dp, char* block_buf) 593 { 594 ext2_filsys fs = ctx->fs; 595 struct process_block_struct pb; 596 struct ext2_inode inode; 597 struct problem_context pctx; 598 unsigned int count; 599 600 clear_problem_context(&pctx); 601 pctx.ino = pb.ino = ino; 602 pb.dup_blocks = dp->num_dupblocks; 603 pb.ctx = ctx; 604 pctx.str = "delete_file"; 605 606 e2fsck_read_inode(ctx, ino, &inode, "delete_file"); 607 if (ext2fs_inode_has_valid_blocks(&inode)) 608 pctx.errcode = ext2fs_block_iterate2(fs, ino, BLOCK_FLAG_READ_ONLY, 609 block_buf, delete_file_block, &pb); 610 if (pctx.errcode) 611 fix_problem(ctx, PR_1B_BLOCK_ITERATE, &pctx); 612 if (ctx->inode_bad_map) 613 ext2fs_unmark_inode_bitmap(ctx->inode_bad_map, ino); 614 ext2fs_inode_alloc_stats2(fs, ino, -1, LINUX_S_ISDIR(inode.i_mode)); 615 616 /* Inode may have changed by block_iterate, so reread it */ 617 e2fsck_read_inode(ctx, ino, &inode, "delete_file"); 618 e2fsck_clear_inode(ctx, ino, &inode, 0, "delete_file"); 619 if (inode.i_file_acl && 620 (fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_EXT_ATTR)) { 621 count = 1; 622 pctx.errcode = ext2fs_adjust_ea_refcount(fs, inode.i_file_acl, 623 block_buf, -1, &count); 624 if (pctx.errcode == EXT2_ET_BAD_EA_BLOCK_NUM) { 625 pctx.errcode = 0; 626 count = 1; 627 } 628 if (pctx.errcode) { 629 pctx.blk = inode.i_file_acl; 630 fix_problem(ctx, PR_1B_ADJ_EA_REFCOUNT, &pctx); 631 } 632 /* 633 * If the count is zero, then arrange to have the 634 * block deleted. If the block is in the block_dup_map, 635 * also call delete_file_block since it will take care 636 * of keeping the accounting straight. 637 */ 638 if ((count == 0) || 639 ext2fs_test_block_bitmap(ctx->block_dup_map, 640 inode.i_file_acl)) 641 delete_file_block(fs, &inode.i_file_acl, 642 BLOCK_COUNT_EXTATTR, 0, 0, &pb); 643 } 644 } 645 646 struct clone_struct { 647 errcode_t errcode; 648 ext2_ino_t dir; 649 char *buf; 650 e2fsck_t ctx; 651 }; 652 653 static int clone_file_block(ext2_filsys fs, 654 blk_t *block_nr, 655 e2_blkcnt_t blockcnt, 656 blk_t ref_block EXT2FS_ATTR((unused)), 657 int ref_offset EXT2FS_ATTR((unused)), 658 void *priv_data) 659 { 660 struct dup_block *p; 661 blk_t new_block; 662 errcode_t retval; 663 struct clone_struct *cs = (struct clone_struct *) priv_data; 664 dnode_t *n; 665 e2fsck_t ctx; 666 667 ctx = cs->ctx; 668 669 if (HOLE_BLKADDR(*block_nr)) 670 return 0; 671 672 if (ext2fs_test_block_bitmap(ctx->block_dup_map, *block_nr)) { 673 n = dict_lookup(&blk_dict, INT_TO_VOIDPTR(*block_nr)); 674 if (n) { 675 p = (struct dup_block *) dnode_get(n); 676 retval = ext2fs_new_block(fs, 0, ctx->block_found_map, 677 &new_block); 678 if (retval) { 679 cs->errcode = retval; 680 return BLOCK_ABORT; 681 } 682 if (cs->dir && (blockcnt >= 0)) { 683 retval = ext2fs_set_dir_block(fs->dblist, 684 cs->dir, new_block, blockcnt); 685 if (retval) { 686 cs->errcode = retval; 687 return BLOCK_ABORT; 688 } 689 } 690 #if 0 691 printf("Cloning block %u to %u\n", *block_nr, 692 new_block); 693 #endif 694 retval = io_channel_read_blk(fs->io, *block_nr, 1, 695 cs->buf); 696 if (retval) { 697 cs->errcode = retval; 698 return BLOCK_ABORT; 699 } 700 retval = io_channel_write_blk(fs->io, new_block, 1, 701 cs->buf); 702 if (retval) { 703 cs->errcode = retval; 704 return BLOCK_ABORT; 705 } 706 decrement_badcount(ctx, *block_nr, p); 707 *block_nr = new_block; 708 ext2fs_mark_block_bitmap(ctx->block_found_map, 709 new_block); 710 ext2fs_mark_block_bitmap(fs->block_map, new_block); 711 return BLOCK_CHANGED; 712 } else 713 com_err("clone_file_block", 0, 714 _("internal error: can't find dup_blk for %u\n"), 715 *block_nr); 716 } 717 return 0; 718 } 719 720 static int clone_file(e2fsck_t ctx, ext2_ino_t ino, 721 struct dup_inode *dp, char* block_buf) 722 { 723 ext2_filsys fs = ctx->fs; 724 errcode_t retval; 725 struct clone_struct cs; 726 struct problem_context pctx; 727 blk_t blk; 728 dnode_t *n; 729 struct inode_el *ino_el; 730 struct dup_block *db; 731 struct dup_inode *di; 732 733 clear_problem_context(&pctx); 734 cs.errcode = 0; 735 cs.dir = 0; 736 cs.ctx = ctx; 737 retval = ext2fs_get_mem(fs->blocksize, &cs.buf); 738 if (retval) 739 return retval; 740 741 if (ext2fs_test_inode_bitmap(ctx->inode_dir_map, ino)) 742 cs.dir = ino; 743 744 pctx.ino = ino; 745 pctx.str = "clone_file"; 746 if (ext2fs_inode_has_valid_blocks(&dp->inode)) 747 pctx.errcode = ext2fs_block_iterate2(fs, ino, 0, block_buf, 748 clone_file_block, &cs); 749 ext2fs_mark_bb_dirty(fs); 750 if (pctx.errcode) { 751 fix_problem(ctx, PR_1B_BLOCK_ITERATE, &pctx); 752 retval = pctx.errcode; 753 goto errout; 754 } 755 if (cs.errcode) { 756 com_err("clone_file", cs.errcode, 757 _("returned from clone_file_block")); 758 retval = cs.errcode; 759 goto errout; 760 } 761 /* The inode may have changed on disk, so we have to re-read it */ 762 e2fsck_read_inode(ctx, ino, &dp->inode, "clone file EA"); 763 blk = dp->inode.i_file_acl; 764 if (blk && (clone_file_block(fs, &dp->inode.i_file_acl, 765 BLOCK_COUNT_EXTATTR, 0, 0, &cs) == 766 BLOCK_CHANGED)) { 767 e2fsck_write_inode(ctx, ino, &dp->inode, "clone file EA"); 768 /* 769 * If we cloned the EA block, find all other inodes 770 * which refered to that EA block, and modify 771 * them to point to the new EA block. 772 */ 773 n = dict_lookup(&blk_dict, INT_TO_VOIDPTR(blk)); 774 if (!n) { 775 com_err("clone_file", 0, 776 _("internal error: couldn't lookup EA " 777 "block record for %u"), blk); 778 retval = 0; /* OK to stumble on... */ 779 goto errout; 780 } 781 db = (struct dup_block *) dnode_get(n); 782 for (ino_el = db->inode_list; ino_el; ino_el = ino_el->next) { 783 if (ino_el->inode == ino) 784 continue; 785 n = dict_lookup(&ino_dict, INT_TO_VOIDPTR(ino_el->inode)); 786 if (!n) { 787 com_err("clone_file", 0, 788 _("internal error: couldn't lookup EA " 789 "inode record for %u"), 790 ino_el->inode); 791 retval = 0; /* OK to stumble on... */ 792 goto errout; 793 } 794 di = (struct dup_inode *) dnode_get(n); 795 if (di->inode.i_file_acl == blk) { 796 di->inode.i_file_acl = dp->inode.i_file_acl; 797 e2fsck_write_inode(ctx, ino_el->inode, 798 &di->inode, "clone file EA"); 799 decrement_badcount(ctx, blk, db); 800 } 801 } 802 } 803 retval = 0; 804 errout: 805 ext2fs_free_mem(&cs.buf); 806 return retval; 807 } 808 809 /* 810 * This routine returns 1 if a block overlaps with one of the superblocks, 811 * group descriptors, inode bitmaps, or block bitmaps. 812 */ 813 static int check_if_fs_block(e2fsck_t ctx, blk_t test_block) 814 { 815 ext2_filsys fs = ctx->fs; 816 blk_t first_block; 817 dgrp_t i; 818 819 first_block = fs->super->s_first_data_block; 820 for (i = 0; i < fs->group_desc_count; i++) { 821 822 /* Check superblocks/block group descriptors */ 823 if (ext2fs_bg_has_super(fs, i)) { 824 if (test_block >= first_block && 825 (test_block <= first_block + fs->desc_blocks)) 826 return 1; 827 } 828 829 /* Check the inode table */ 830 if ((fs->group_desc[i].bg_inode_table) && 831 (test_block >= fs->group_desc[i].bg_inode_table) && 832 (test_block < (fs->group_desc[i].bg_inode_table + 833 fs->inode_blocks_per_group))) 834 return 1; 835 836 /* Check the bitmap blocks */ 837 if ((test_block == fs->group_desc[i].bg_block_bitmap) || 838 (test_block == fs->group_desc[i].bg_inode_bitmap)) 839 return 1; 840 841 first_block += fs->super->s_blocks_per_group; 842 } 843 return 0; 844 } 845
