pass1.c revision 68477355a9f3b4ca46dfa6c34d05105dcc6682ad
1/* 2 * pass1.c -- pass #1 of e2fsck: sequential scan of the inode table 3 * 4 * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o. 5 * 6 * %Begin-Header% 7 * This file may be redistributed under the terms of the GNU Public 8 * License. 9 * %End-Header% 10 * 11 * Pass 1 of e2fsck iterates over all the inodes in the filesystems, 12 * and applies the following tests to each inode: 13 * 14 * - The mode field of the inode must be legal. 15 * - The size and block count fields of the inode are correct. 16 * - A data block must not be used by another inode 17 * 18 * Pass 1 also gathers the collects the following information: 19 * 20 * - A bitmap of which inodes are in use. (inode_used_map) 21 * - A bitmap of which inodes are directories. (inode_dir_map) 22 * - A bitmap of which inodes are regular files. (inode_reg_map) 23 * - A bitmap of which inodes have bad fields. (inode_bad_map) 24 * - A bitmap of which inodes are in bad blocks. (inode_bb_map) 25 * - A bitmap of which inodes are imagic inodes. (inode_imagic_map) 26 * - A bitmap of which blocks are in use. (block_found_map) 27 * - A bitmap of which blocks are in use by two inodes (block_dup_map) 28 * - The data blocks of the directory inodes. (dir_map) 29 * 30 * Pass 1 is designed to stash away enough information so that the 31 * other passes should not need to read in the inode information 32 * during the normal course of a filesystem check. (Althogh if an 33 * inconsistency is detected, other passes may need to read in an 34 * inode to fix it.) 35 * 36 * Note that pass 1B will be invoked if there are any duplicate blocks 37 * found. 38 */ 39 40#define _GNU_SOURCE 1 /* get strnlen() */ 41#include "config.h" 42#include <string.h> 43#include <time.h> 44#ifdef HAVE_ERRNO_H 45#include <errno.h> 46#endif 47 48#include "e2fsck.h" 49#include <ext2fs/ext2_ext_attr.h> 50 51#include "problem.h" 52 53#ifdef NO_INLINE_FUNCS 54#define _INLINE_ 55#else 56#define _INLINE_ inline 57#endif 58 59static int process_block(ext2_filsys fs, blk64_t *blocknr, 60 e2_blkcnt_t blockcnt, blk64_t ref_blk, 61 int ref_offset, void *priv_data); 62static int process_bad_block(ext2_filsys fs, blk64_t *block_nr, 63 e2_blkcnt_t blockcnt, blk64_t ref_blk, 64 int ref_offset, void *priv_data); 65static void check_blocks(e2fsck_t ctx, struct problem_context *pctx, 66 char *block_buf); 67static void mark_table_blocks(e2fsck_t ctx); 68static void alloc_bb_map(e2fsck_t ctx); 69static void alloc_imagic_map(e2fsck_t ctx); 70static void mark_inode_bad(e2fsck_t ctx, ino_t ino); 71static void handle_fs_bad_blocks(e2fsck_t ctx); 72static void process_inodes(e2fsck_t ctx, char *block_buf); 73static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b); 74static errcode_t scan_callback(ext2_filsys fs, ext2_inode_scan scan, 75 dgrp_t group, void * priv_data); 76static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount, 77 char *block_buf, int adjust_sign); 78/* static char *describe_illegal_block(ext2_filsys fs, blk64_t block); */ 79 80struct process_block_struct { 81 ext2_ino_t ino; 82 unsigned is_dir:1, is_reg:1, clear:1, suppress:1, 83 fragmented:1, compressed:1, bbcheck:1; 84 blk64_t num_blocks; 85 blk64_t max_blocks; 86 e2_blkcnt_t last_block; 87 e2_blkcnt_t last_init_lblock; 88 e2_blkcnt_t last_db_block; 89 int num_illegal_blocks; 90 blk64_t previous_block; 91 struct ext2_inode *inode; 92 struct problem_context *pctx; 93 ext2fs_block_bitmap fs_meta_blocks; 94 e2fsck_t ctx; 95}; 96 97struct process_inode_block { 98 ext2_ino_t ino; 99 struct ext2_inode inode; 100}; 101 102struct scan_callback_struct { 103 e2fsck_t ctx; 104 char *block_buf; 105}; 106 107/* 108 * For the inodes to process list. 109 */ 110static struct process_inode_block *inodes_to_process; 111static int process_inode_count; 112 113static __u64 ext2_max_sizes[EXT2_MAX_BLOCK_LOG_SIZE - 114 EXT2_MIN_BLOCK_LOG_SIZE + 1]; 115 116/* 117 * Free all memory allocated by pass1 in preparation for restarting 118 * things. 119 */ 120static void unwind_pass1(ext2_filsys fs EXT2FS_ATTR((unused))) 121{ 122 ext2fs_free_mem(&inodes_to_process); 123 inodes_to_process = 0; 124} 125 126/* 127 * Check to make sure a device inode is real. Returns 1 if the device 128 * checks out, 0 if not. 129 * 130 * Note: this routine is now also used to check FIFO's and Sockets, 131 * since they have the same requirement; the i_block fields should be 132 * zero. 133 */ 134int e2fsck_pass1_check_device_inode(ext2_filsys fs EXT2FS_ATTR((unused)), 135 struct ext2_inode *inode) 136{ 137 int i; 138 139 /* 140 * If the index flag is set, then this is a bogus 141 * device/fifo/socket 142 */ 143 if (inode->i_flags & EXT2_INDEX_FL) 144 return 0; 145 146 /* 147 * We should be able to do the test below all the time, but 148 * because the kernel doesn't forcibly clear the device 149 * inode's additional i_block fields, there are some rare 150 * occasions when a legitimate device inode will have non-zero 151 * additional i_block fields. So for now, we only complain 152 * when the immutable flag is set, which should never happen 153 * for devices. (And that's when the problem is caused, since 154 * you can't set or clear immutable flags for devices.) Once 155 * the kernel has been fixed we can change this... 156 */ 157 if (inode->i_flags & (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)) { 158 for (i=4; i < EXT2_N_BLOCKS; i++) 159 if (inode->i_block[i]) 160 return 0; 161 } 162 return 1; 163} 164 165/* 166 * Check to make sure a symlink inode is real. Returns 1 if the symlink 167 * checks out, 0 if not. 168 */ 169int e2fsck_pass1_check_symlink(ext2_filsys fs, ext2_ino_t ino, 170 struct ext2_inode *inode, char *buf) 171{ 172 unsigned int len; 173 int i; 174 blk64_t blocks; 175 ext2_extent_handle_t handle; 176 struct ext2_extent_info info; 177 struct ext2fs_extent extent; 178 179 if ((inode->i_size_high || inode->i_size == 0) || 180 (inode->i_flags & EXT2_INDEX_FL)) 181 return 0; 182 183 if (inode->i_flags & EXT4_EXTENTS_FL) { 184 if (inode->i_size > fs->blocksize) 185 return 0; 186 if (ext2fs_extent_open2(fs, ino, inode, &handle)) 187 return 0; 188 i = 0; 189 if (ext2fs_extent_get_info(handle, &info) || 190 (info.num_entries != 1) || 191 (info.max_depth != 0)) 192 goto exit_extent; 193 if (ext2fs_extent_get(handle, EXT2_EXTENT_ROOT, &extent) || 194 (extent.e_lblk != 0) || 195 (extent.e_len != 1) || 196 (extent.e_pblk < fs->super->s_first_data_block) || 197 (extent.e_pblk >= ext2fs_blocks_count(fs->super))) 198 goto exit_extent; 199 i = 1; 200 exit_extent: 201 ext2fs_extent_free(handle); 202 return i; 203 } 204 205 blocks = ext2fs_inode_data_blocks2(fs, inode); 206 if (blocks) { 207 if ((inode->i_size >= fs->blocksize) || 208 (blocks != fs->blocksize >> 9) || 209 (inode->i_block[0] < fs->super->s_first_data_block) || 210 (inode->i_block[0] >= ext2fs_blocks_count(fs->super))) 211 return 0; 212 213 for (i = 1; i < EXT2_N_BLOCKS; i++) 214 if (inode->i_block[i]) 215 return 0; 216 217 if (io_channel_read_blk64(fs->io, inode->i_block[0], 1, buf)) 218 return 0; 219 220 len = strnlen(buf, fs->blocksize); 221 if (len == fs->blocksize) 222 return 0; 223 } else { 224 if (inode->i_size >= sizeof(inode->i_block)) 225 return 0; 226 227 len = strnlen((char *)inode->i_block, sizeof(inode->i_block)); 228 if (len == sizeof(inode->i_block)) 229 return 0; 230 } 231 if (len != inode->i_size) 232 return 0; 233 return 1; 234} 235 236/* 237 * If the immutable (or append-only) flag is set on the inode, offer 238 * to clear it. 239 */ 240#define BAD_SPECIAL_FLAGS (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL) 241static void check_immutable(e2fsck_t ctx, struct problem_context *pctx) 242{ 243 if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS)) 244 return; 245 246 if (!fix_problem(ctx, PR_1_SET_IMMUTABLE, pctx)) 247 return; 248 249 pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS; 250 e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1"); 251} 252 253/* 254 * If device, fifo or socket, check size is zero -- if not offer to 255 * clear it 256 */ 257static void check_size(e2fsck_t ctx, struct problem_context *pctx) 258{ 259 struct ext2_inode *inode = pctx->inode; 260 261 if (EXT2_I_SIZE(inode) == 0) 262 return; 263 264 if (!fix_problem(ctx, PR_1_SET_NONZSIZE, pctx)) 265 return; 266 267 inode->i_size = 0; 268 inode->i_size_high = 0; 269 e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1"); 270} 271 272static void check_ea_in_inode(e2fsck_t ctx, struct problem_context *pctx) 273{ 274 struct ext2_super_block *sb = ctx->fs->super; 275 struct ext2_inode_large *inode; 276 struct ext2_ext_attr_entry *entry; 277 char *start; 278 unsigned int storage_size, remain; 279 int problem = 0; 280 281 inode = (struct ext2_inode_large *) pctx->inode; 282 storage_size = EXT2_INODE_SIZE(ctx->fs->super) - EXT2_GOOD_OLD_INODE_SIZE - 283 inode->i_extra_isize; 284 start = ((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE + 285 inode->i_extra_isize + sizeof(__u32); 286 entry = (struct ext2_ext_attr_entry *) start; 287 288 /* scan all entry's headers first */ 289 290 /* take finish entry 0UL into account */ 291 remain = storage_size - sizeof(__u32); 292 293 while (!EXT2_EXT_IS_LAST_ENTRY(entry)) { 294 __u32 hash; 295 296 /* header eats this space */ 297 remain -= sizeof(struct ext2_ext_attr_entry); 298 299 /* is attribute name valid? */ 300 if (EXT2_EXT_ATTR_SIZE(entry->e_name_len) > remain) { 301 pctx->num = entry->e_name_len; 302 problem = PR_1_ATTR_NAME_LEN; 303 goto fix; 304 } 305 306 /* attribute len eats this space */ 307 remain -= EXT2_EXT_ATTR_SIZE(entry->e_name_len); 308 309 /* check value size */ 310 if (entry->e_value_size > remain) { 311 pctx->num = entry->e_value_size; 312 problem = PR_1_ATTR_VALUE_SIZE; 313 goto fix; 314 } 315 316 /* e_value_block must be 0 in inode's ea */ 317 if (entry->e_value_block != 0) { 318 pctx->num = entry->e_value_block; 319 problem = PR_1_ATTR_VALUE_BLOCK; 320 goto fix; 321 } 322 323 hash = ext2fs_ext_attr_hash_entry(entry, 324 start + entry->e_value_offs); 325 326 /* e_hash may be 0 in older inode's ea */ 327 if (entry->e_hash != 0 && entry->e_hash != hash) { 328 pctx->num = entry->e_hash; 329 problem = PR_1_ATTR_HASH; 330 goto fix; 331 } 332 333 remain -= entry->e_value_size; 334 335 entry = EXT2_EXT_ATTR_NEXT(entry); 336 } 337fix: 338 /* 339 * it seems like a corruption. it's very unlikely we could repair 340 * EA(s) in automatic fashion -bzzz 341 */ 342 if (problem == 0 || !fix_problem(ctx, problem, pctx)) 343 return; 344 345 /* simply remove all possible EA(s) */ 346 *((__u32 *)start) = 0UL; 347 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode, 348 EXT2_INODE_SIZE(sb), "pass1"); 349} 350 351static void check_inode_extra_space(e2fsck_t ctx, struct problem_context *pctx) 352{ 353 struct ext2_super_block *sb = ctx->fs->super; 354 struct ext2_inode_large *inode; 355 __u32 *eamagic; 356 int min, max; 357 358 inode = (struct ext2_inode_large *) pctx->inode; 359 if (EXT2_INODE_SIZE(sb) == EXT2_GOOD_OLD_INODE_SIZE) { 360 /* this isn't large inode. so, nothing to check */ 361 return; 362 } 363 364#if 0 365 printf("inode #%u, i_extra_size %d\n", pctx->ino, 366 inode->i_extra_isize); 367#endif 368 /* i_extra_isize must cover i_extra_isize + i_checksum_hi at least */ 369 min = sizeof(inode->i_extra_isize) + sizeof(inode->i_checksum_hi); 370 max = EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE; 371 /* 372 * For now we will allow i_extra_isize to be 0, but really 373 * implementations should never allow i_extra_isize to be 0 374 */ 375 if (inode->i_extra_isize && 376 (inode->i_extra_isize < min || inode->i_extra_isize > max)) { 377 if (!fix_problem(ctx, PR_1_EXTRA_ISIZE, pctx)) 378 return; 379 inode->i_extra_isize = min; 380 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode, 381 EXT2_INODE_SIZE(sb), "pass1"); 382 return; 383 } 384 385 eamagic = (__u32 *) (((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE + 386 inode->i_extra_isize); 387 if (*eamagic == EXT2_EXT_ATTR_MAGIC) { 388 /* it seems inode has an extended attribute(s) in body */ 389 check_ea_in_inode(ctx, pctx); 390 } 391} 392 393/* 394 * Check to see if the inode might really be a directory, despite i_mode 395 * 396 * This is a lot of complexity for something for which I'm not really 397 * convinced happens frequently in the wild. If for any reason this 398 * causes any problems, take this code out. 399 * [tytso:20070331.0827EDT] 400 */ 401static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx, 402 char *buf) 403{ 404 struct ext2_inode *inode = pctx->inode; 405 struct ext2_dir_entry *dirent; 406 errcode_t retval; 407 blk64_t blk; 408 unsigned int i, rec_len, not_device = 0; 409 int extent_fs; 410 411 /* 412 * If the mode looks OK, we believe it. If the first block in 413 * the i_block array is 0, this cannot be a directory. If the 414 * inode is extent-mapped, it is still the case that the latter 415 * cannot be 0 - the magic number in the extent header would make 416 * it nonzero. 417 */ 418 if (LINUX_S_ISDIR(inode->i_mode) || LINUX_S_ISREG(inode->i_mode) || 419 LINUX_S_ISLNK(inode->i_mode) || inode->i_block[0] == 0) 420 return; 421 422 /* 423 * Check the block numbers in the i_block array for validity: 424 * zero blocks are skipped (but the first one cannot be zero - 425 * see above), other blocks are checked against the first and 426 * max data blocks (from the the superblock) and against the 427 * block bitmap. Any invalid block found means this cannot be 428 * a directory. 429 * 430 * If there are non-zero blocks past the fourth entry, then 431 * this cannot be a device file: we remember that for the next 432 * check. 433 * 434 * For extent mapped files, we don't do any sanity checking: 435 * just try to get the phys block of logical block 0 and run 436 * with it. 437 */ 438 439 extent_fs = (ctx->fs->super->s_feature_incompat & 440 EXT3_FEATURE_INCOMPAT_EXTENTS); 441 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) { 442 /* extent mapped */ 443 if (ext2fs_bmap2(ctx->fs, pctx->ino, inode, 0, 0, 0, 0, 444 &blk)) 445 return; 446 /* device files are never extent mapped */ 447 not_device++; 448 } else { 449 for (i=0; i < EXT2_N_BLOCKS; i++) { 450 blk = inode->i_block[i]; 451 if (!blk) 452 continue; 453 if (i >= 4) 454 not_device++; 455 456 if (blk < ctx->fs->super->s_first_data_block || 457 blk >= ext2fs_blocks_count(ctx->fs->super) || 458 ext2fs_fast_test_block_bitmap2(ctx->block_found_map, 459 blk)) 460 return; /* Invalid block, can't be dir */ 461 } 462 blk = inode->i_block[0]; 463 } 464 465 /* 466 * If the mode says this is a device file and the i_links_count field 467 * is sane and we have not ruled it out as a device file previously, 468 * we declare it a device file, not a directory. 469 */ 470 if ((LINUX_S_ISCHR(inode->i_mode) || LINUX_S_ISBLK(inode->i_mode)) && 471 (inode->i_links_count == 1) && !not_device) 472 return; 473 474 /* read the first block */ 475 ehandler_operation(_("reading directory block")); 476 retval = ext2fs_read_dir_block3(ctx->fs, blk, buf, 0); 477 ehandler_operation(0); 478 if (retval) 479 return; 480 481 dirent = (struct ext2_dir_entry *) buf; 482 retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len); 483 if (retval) 484 return; 485 if (((dirent->name_len & 0xFF) != 1) || 486 (dirent->name[0] != '.') || 487 (dirent->inode != pctx->ino) || 488 (rec_len < 12) || 489 (rec_len % 4) || 490 (rec_len >= ctx->fs->blocksize - 12)) 491 return; 492 493 dirent = (struct ext2_dir_entry *) (buf + rec_len); 494 retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len); 495 if (retval) 496 return; 497 if (((dirent->name_len & 0xFF) != 2) || 498 (dirent->name[0] != '.') || 499 (dirent->name[1] != '.') || 500 (rec_len < 12) || 501 (rec_len % 4)) 502 return; 503 504 if (fix_problem(ctx, PR_1_TREAT_AS_DIRECTORY, pctx)) { 505 inode->i_mode = (inode->i_mode & 07777) | LINUX_S_IFDIR; 506 e2fsck_write_inode_full(ctx, pctx->ino, inode, 507 EXT2_INODE_SIZE(ctx->fs->super), 508 "check_is_really_dir"); 509 } 510} 511 512extern void e2fsck_setup_tdb_icount(e2fsck_t ctx, int flags, 513 ext2_icount_t *ret) 514{ 515 unsigned int threshold; 516 ext2_ino_t num_dirs; 517 errcode_t retval; 518 char *tdb_dir; 519 int enable; 520 521 *ret = 0; 522 523 profile_get_string(ctx->profile, "scratch_files", "directory", 0, 0, 524 &tdb_dir); 525 profile_get_uint(ctx->profile, "scratch_files", 526 "numdirs_threshold", 0, 0, &threshold); 527 profile_get_boolean(ctx->profile, "scratch_files", 528 "icount", 0, 1, &enable); 529 530 retval = ext2fs_get_num_dirs(ctx->fs, &num_dirs); 531 if (retval) 532 num_dirs = 1024; /* Guess */ 533 534 if (!enable || !tdb_dir || access(tdb_dir, W_OK) || 535 (threshold && num_dirs <= threshold)) 536 return; 537 538 retval = ext2fs_create_icount_tdb(ctx->fs, tdb_dir, flags, ret); 539 if (retval) 540 *ret = 0; 541} 542 543void e2fsck_pass1(e2fsck_t ctx) 544{ 545 int i; 546 __u64 max_sizes; 547 ext2_filsys fs = ctx->fs; 548 ext2_ino_t ino = 0; 549 struct ext2_inode *inode; 550 ext2_inode_scan scan; 551 char *block_buf; 552#ifdef RESOURCE_TRACK 553 struct resource_track rtrack; 554#endif 555 unsigned char frag, fsize; 556 struct problem_context pctx; 557 struct scan_callback_struct scan_struct; 558 struct ext2_super_block *sb = ctx->fs->super; 559 const char *old_op; 560 unsigned int save_type; 561 int imagic_fs, extent_fs; 562 int busted_fs_time = 0; 563 int inode_size; 564 565 init_resource_track(&rtrack, ctx->fs->io); 566 clear_problem_context(&pctx); 567 568 if (!(ctx->options & E2F_OPT_PREEN)) 569 fix_problem(ctx, PR_1_PASS_HEADER, &pctx); 570 571 if ((fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) && 572 !(ctx->options & E2F_OPT_NO)) { 573 if (ext2fs_u32_list_create(&ctx->dirs_to_hash, 50)) 574 ctx->dirs_to_hash = 0; 575 } 576 577#ifdef MTRACE 578 mtrace_print("Pass 1"); 579#endif 580 581#define EXT2_BPP(bits) (1ULL << ((bits) - 2)) 582 583 for (i = EXT2_MIN_BLOCK_LOG_SIZE; i <= EXT2_MAX_BLOCK_LOG_SIZE; i++) { 584 max_sizes = EXT2_NDIR_BLOCKS + EXT2_BPP(i); 585 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i); 586 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i) * EXT2_BPP(i); 587 max_sizes = (max_sizes * (1UL << i)); 588 ext2_max_sizes[i - EXT2_MIN_BLOCK_LOG_SIZE] = max_sizes; 589 } 590#undef EXT2_BPP 591 592 imagic_fs = (sb->s_feature_compat & EXT2_FEATURE_COMPAT_IMAGIC_INODES); 593 extent_fs = (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS); 594 595 /* 596 * Allocate bitmaps structures 597 */ 598 pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("in-use inode map"), 599 EXT2FS_BMAP64_RBTREE, 600 "inode_used_map", 601 &ctx->inode_used_map); 602 if (pctx.errcode) { 603 pctx.num = 1; 604 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx); 605 ctx->flags |= E2F_FLAG_ABORT; 606 return; 607 } 608 pctx.errcode = e2fsck_allocate_inode_bitmap(fs, 609 _("directory inode map"), 610 EXT2FS_BMAP64_AUTODIR, 611 "inode_dir_map", &ctx->inode_dir_map); 612 if (pctx.errcode) { 613 pctx.num = 2; 614 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx); 615 ctx->flags |= E2F_FLAG_ABORT; 616 return; 617 } 618 pctx.errcode = e2fsck_allocate_inode_bitmap(fs, 619 _("regular file inode map"), EXT2FS_BMAP64_RBTREE, 620 "inode_reg_map", &ctx->inode_reg_map); 621 if (pctx.errcode) { 622 pctx.num = 6; 623 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx); 624 ctx->flags |= E2F_FLAG_ABORT; 625 return; 626 } 627 pctx.errcode = e2fsck_allocate_subcluster_bitmap(fs, 628 _("in-use block map"), EXT2FS_BMAP64_RBTREE, 629 "block_found_map", &ctx->block_found_map); 630 if (pctx.errcode) { 631 pctx.num = 1; 632 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx); 633 ctx->flags |= E2F_FLAG_ABORT; 634 return; 635 } 636 e2fsck_setup_tdb_icount(ctx, 0, &ctx->inode_link_info); 637 if (!ctx->inode_link_info) { 638 e2fsck_set_bitmap_type(fs, EXT2FS_BMAP64_RBTREE, 639 "inode_link_info", &save_type); 640 pctx.errcode = ext2fs_create_icount2(fs, 0, 0, 0, 641 &ctx->inode_link_info); 642 fs->default_bitmap_type = save_type; 643 } 644 645 if (pctx.errcode) { 646 fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx); 647 ctx->flags |= E2F_FLAG_ABORT; 648 return; 649 } 650 inode_size = EXT2_INODE_SIZE(fs->super); 651 inode = (struct ext2_inode *) 652 e2fsck_allocate_memory(ctx, inode_size, "scratch inode"); 653 654 inodes_to_process = (struct process_inode_block *) 655 e2fsck_allocate_memory(ctx, 656 (ctx->process_inode_size * 657 sizeof(struct process_inode_block)), 658 "array of inodes to process"); 659 process_inode_count = 0; 660 661 pctx.errcode = ext2fs_init_dblist(fs, 0); 662 if (pctx.errcode) { 663 fix_problem(ctx, PR_1_ALLOCATE_DBCOUNT, &pctx); 664 ctx->flags |= E2F_FLAG_ABORT; 665 ext2fs_free_mem(&inode); 666 return; 667 } 668 669 /* 670 * If the last orphan field is set, clear it, since the pass1 671 * processing will automatically find and clear the orphans. 672 * In the future, we may want to try using the last_orphan 673 * linked list ourselves, but for now, we clear it so that the 674 * ext3 mount code won't get confused. 675 */ 676 if (!(ctx->options & E2F_OPT_READONLY)) { 677 if (fs->super->s_last_orphan) { 678 fs->super->s_last_orphan = 0; 679 ext2fs_mark_super_dirty(fs); 680 } 681 } 682 683 mark_table_blocks(ctx); 684 pctx.errcode = ext2fs_convert_subcluster_bitmap(fs, 685 &ctx->block_found_map); 686 if (pctx.errcode) { 687 fix_problem(ctx, PR_1_CONVERT_SUBCLUSTER, &pctx); 688 ctx->flags |= E2F_FLAG_ABORT; 689 ext2fs_free_mem(&inode); 690 return; 691 } 692 block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3, 693 "block interate buffer"); 694 e2fsck_use_inode_shortcuts(ctx, 1); 695 old_op = ehandler_operation(_("opening inode scan")); 696 pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks, 697 &scan); 698 ehandler_operation(old_op); 699 if (pctx.errcode) { 700 fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx); 701 ctx->flags |= E2F_FLAG_ABORT; 702 ext2fs_free_mem(&block_buf); 703 ext2fs_free_mem(&inode); 704 return; 705 } 706 ext2fs_inode_scan_flags(scan, EXT2_SF_SKIP_MISSING_ITABLE, 0); 707 ctx->stashed_inode = inode; 708 scan_struct.ctx = ctx; 709 scan_struct.block_buf = block_buf; 710 ext2fs_set_inode_callback(scan, scan_callback, &scan_struct); 711 if (ctx->progress) 712 if ((ctx->progress)(ctx, 1, 0, ctx->fs->group_desc_count)) 713 return; 714 if ((fs->super->s_wtime < fs->super->s_inodes_count) || 715 (fs->super->s_mtime < fs->super->s_inodes_count)) 716 busted_fs_time = 1; 717 718 if ((fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_MMP) && 719 !(fs->super->s_mmp_block <= fs->super->s_first_data_block || 720 fs->super->s_mmp_block >= fs->super->s_blocks_count)) 721 ext2fs_mark_block_bitmap2(ctx->block_found_map, 722 fs->super->s_mmp_block); 723 724 while (1) { 725 if (ino % (fs->super->s_inodes_per_group * 4) == 1) { 726 if (e2fsck_mmp_update(fs)) 727 fatal_error(ctx, 0); 728 } 729 old_op = ehandler_operation(_("getting next inode from scan")); 730 pctx.errcode = ext2fs_get_next_inode_full(scan, &ino, 731 inode, inode_size); 732 ehandler_operation(old_op); 733 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 734 return; 735 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) { 736 if (!ctx->inode_bb_map) 737 alloc_bb_map(ctx); 738 ext2fs_mark_inode_bitmap2(ctx->inode_bb_map, ino); 739 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino); 740 continue; 741 } 742 if (pctx.errcode) { 743 fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx); 744 ctx->flags |= E2F_FLAG_ABORT; 745 return; 746 } 747 if (!ino) 748 break; 749 pctx.ino = ino; 750 pctx.inode = inode; 751 ctx->stashed_ino = ino; 752 if (inode->i_links_count) { 753 pctx.errcode = ext2fs_icount_store(ctx->inode_link_info, 754 ino, inode->i_links_count); 755 if (pctx.errcode) { 756 pctx.num = inode->i_links_count; 757 fix_problem(ctx, PR_1_ICOUNT_STORE, &pctx); 758 ctx->flags |= E2F_FLAG_ABORT; 759 return; 760 } 761 } 762 763 /* 764 * Test for incorrect extent flag settings. 765 * 766 * On big-endian machines we must be careful: 767 * When the inode is read, the i_block array is not swapped 768 * if the extent flag is set. Therefore if we are testing 769 * for or fixing a wrongly-set flag, we must potentially 770 * (un)swap before testing, or after fixing. 771 */ 772 773 /* 774 * In this case the extents flag was set when read, so 775 * extent_header_verify is ok. If the inode is cleared, 776 * no need to swap... so no extra swapping here. 777 */ 778 if ((inode->i_flags & EXT4_EXTENTS_FL) && !extent_fs && 779 (inode->i_links_count || (ino == EXT2_BAD_INO) || 780 (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO))) { 781 if ((ext2fs_extent_header_verify(inode->i_block, 782 sizeof(inode->i_block)) == 0) && 783 fix_problem(ctx, PR_1_EXTENT_FEATURE, &pctx)) { 784 sb->s_feature_incompat |= EXT3_FEATURE_INCOMPAT_EXTENTS; 785 ext2fs_mark_super_dirty(fs); 786 extent_fs = 1; 787 } else if (fix_problem(ctx, PR_1_EXTENTS_SET, &pctx)) { 788 clear_inode: 789 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1"); 790 if (ino == EXT2_BAD_INO) 791 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, 792 ino); 793 continue; 794 } 795 } 796 797 /* 798 * For big-endian machines: 799 * If the inode didn't have the extents flag set when it 800 * was read, then the i_blocks array was swapped. To test 801 * as an extents header, we must swap it back first. 802 * IF we then set the extents flag, the entire i_block 803 * array must be un/re-swapped to make it proper extents data. 804 */ 805 if (extent_fs && !(inode->i_flags & EXT4_EXTENTS_FL) && 806 (inode->i_links_count || (ino == EXT2_BAD_INO) || 807 (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO)) && 808 (LINUX_S_ISREG(inode->i_mode) || 809 LINUX_S_ISDIR(inode->i_mode))) { 810 void *ehp; 811#ifdef WORDS_BIGENDIAN 812 __u32 tmp_block[EXT2_N_BLOCKS]; 813 814 for (i = 0; i < EXT2_N_BLOCKS; i++) 815 tmp_block[i] = ext2fs_swab32(inode->i_block[i]); 816 ehp = tmp_block; 817#else 818 ehp = inode->i_block; 819#endif 820 if ((ext2fs_extent_header_verify(ehp, 821 sizeof(inode->i_block)) == 0) && 822 (fix_problem(ctx, PR_1_UNSET_EXTENT_FL, &pctx))) { 823 inode->i_flags |= EXT4_EXTENTS_FL; 824#ifdef WORDS_BIGENDIAN 825 memcpy(inode->i_block, tmp_block, 826 sizeof(inode->i_block)); 827#endif 828 e2fsck_write_inode(ctx, ino, inode, "pass1"); 829 } 830 } 831 832 if (ino == EXT2_BAD_INO) { 833 struct process_block_struct pb; 834 835 if ((inode->i_mode || inode->i_uid || inode->i_gid || 836 inode->i_links_count || inode->i_file_acl) && 837 fix_problem(ctx, PR_1_INVALID_BAD_INODE, &pctx)) { 838 memset(inode, 0, sizeof(struct ext2_inode)); 839 e2fsck_write_inode(ctx, ino, inode, 840 "clear bad inode"); 841 } 842 843 pctx.errcode = ext2fs_copy_bitmap(ctx->block_found_map, 844 &pb.fs_meta_blocks); 845 if (pctx.errcode) { 846 pctx.num = 4; 847 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx); 848 ctx->flags |= E2F_FLAG_ABORT; 849 return; 850 } 851 pb.ino = EXT2_BAD_INO; 852 pb.num_blocks = pb.last_block = 0; 853 pb.last_db_block = -1; 854 pb.num_illegal_blocks = 0; 855 pb.suppress = 0; pb.clear = 0; pb.is_dir = 0; 856 pb.is_reg = 0; pb.fragmented = 0; pb.bbcheck = 0; 857 pb.inode = inode; 858 pb.pctx = &pctx; 859 pb.ctx = ctx; 860 pctx.errcode = ext2fs_block_iterate3(fs, ino, 0, 861 block_buf, process_bad_block, &pb); 862 ext2fs_free_block_bitmap(pb.fs_meta_blocks); 863 if (pctx.errcode) { 864 fix_problem(ctx, PR_1_BLOCK_ITERATE, &pctx); 865 ctx->flags |= E2F_FLAG_ABORT; 866 return; 867 } 868 if (pb.bbcheck) 869 if (!fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK_PROMPT, &pctx)) { 870 ctx->flags |= E2F_FLAG_ABORT; 871 return; 872 } 873 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino); 874 clear_problem_context(&pctx); 875 continue; 876 } else if (ino == EXT2_ROOT_INO) { 877 /* 878 * Make sure the root inode is a directory; if 879 * not, offer to clear it. It will be 880 * regnerated in pass #3. 881 */ 882 if (!LINUX_S_ISDIR(inode->i_mode)) { 883 if (fix_problem(ctx, PR_1_ROOT_NO_DIR, &pctx)) 884 goto clear_inode; 885 } 886 /* 887 * If dtime is set, offer to clear it. mke2fs 888 * version 0.2b created filesystems with the 889 * dtime field set for the root and lost+found 890 * directories. We won't worry about 891 * /lost+found, since that can be regenerated 892 * easily. But we will fix the root directory 893 * as a special case. 894 */ 895 if (inode->i_dtime && inode->i_links_count) { 896 if (fix_problem(ctx, PR_1_ROOT_DTIME, &pctx)) { 897 inode->i_dtime = 0; 898 e2fsck_write_inode(ctx, ino, inode, 899 "pass1"); 900 } 901 } 902 } else if (ino == EXT2_JOURNAL_INO) { 903 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino); 904 if (fs->super->s_journal_inum == EXT2_JOURNAL_INO) { 905 if (!LINUX_S_ISREG(inode->i_mode) && 906 fix_problem(ctx, PR_1_JOURNAL_BAD_MODE, 907 &pctx)) { 908 inode->i_mode = LINUX_S_IFREG; 909 e2fsck_write_inode(ctx, ino, inode, 910 "pass1"); 911 } 912 check_blocks(ctx, &pctx, block_buf); 913 continue; 914 } 915 if ((inode->i_links_count || 916 inode->i_blocks || inode->i_block[0]) && 917 fix_problem(ctx, PR_1_JOURNAL_INODE_NOT_CLEAR, 918 &pctx)) { 919 memset(inode, 0, inode_size); 920 ext2fs_icount_store(ctx->inode_link_info, 921 ino, 0); 922 e2fsck_write_inode_full(ctx, ino, inode, 923 inode_size, "pass1"); 924 } 925 } else if ((ino == EXT4_USR_QUOTA_INO) || 926 (ino == EXT4_GRP_QUOTA_INO)) { 927 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino); 928 if ((fs->super->s_feature_ro_compat & 929 EXT4_FEATURE_RO_COMPAT_QUOTA) && 930 ((fs->super->s_usr_quota_inum == ino) || 931 (fs->super->s_grp_quota_inum == ino))) { 932 if (!LINUX_S_ISREG(inode->i_mode) && 933 fix_problem(ctx, PR_1_QUOTA_BAD_MODE, 934 &pctx)) { 935 inode->i_mode = LINUX_S_IFREG; 936 e2fsck_write_inode(ctx, ino, inode, 937 "pass1"); 938 } 939 check_blocks(ctx, &pctx, block_buf); 940 continue; 941 } 942 if ((inode->i_links_count || 943 inode->i_blocks || inode->i_block[0]) && 944 fix_problem(ctx, PR_1_QUOTA_INODE_NOT_CLEAR, 945 &pctx)) { 946 memset(inode, 0, inode_size); 947 ext2fs_icount_store(ctx->inode_link_info, 948 ino, 0); 949 e2fsck_write_inode_full(ctx, ino, inode, 950 inode_size, "pass1"); 951 } 952 } else if (ino < EXT2_FIRST_INODE(fs->super)) { 953 int problem = 0; 954 955 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino); 956 if (ino == EXT2_BOOT_LOADER_INO) { 957 if (LINUX_S_ISDIR(inode->i_mode)) 958 problem = PR_1_RESERVED_BAD_MODE; 959 } else if (ino == EXT2_RESIZE_INO) { 960 if (inode->i_mode && 961 !LINUX_S_ISREG(inode->i_mode)) 962 problem = PR_1_RESERVED_BAD_MODE; 963 } else { 964 if (inode->i_mode != 0) 965 problem = PR_1_RESERVED_BAD_MODE; 966 } 967 if (problem) { 968 if (fix_problem(ctx, problem, &pctx)) { 969 inode->i_mode = 0; 970 e2fsck_write_inode(ctx, ino, inode, 971 "pass1"); 972 } 973 } 974 check_blocks(ctx, &pctx, block_buf); 975 continue; 976 } 977 978 /* 979 * Check for inodes who might have been part of the 980 * orphaned list linked list. They should have gotten 981 * dealt with by now, unless the list had somehow been 982 * corrupted. 983 * 984 * FIXME: In the future, inodes which are still in use 985 * (and which are therefore) pending truncation should 986 * be handled specially. Right now we just clear the 987 * dtime field, and the normal e2fsck handling of 988 * inodes where i_size and the inode blocks are 989 * inconsistent is to fix i_size, instead of releasing 990 * the extra blocks. This won't catch the inodes that 991 * was at the end of the orphan list, but it's better 992 * than nothing. The right answer is that there 993 * shouldn't be any bugs in the orphan list handling. :-) 994 */ 995 if (inode->i_dtime && !busted_fs_time && 996 inode->i_dtime < ctx->fs->super->s_inodes_count) { 997 if (fix_problem(ctx, PR_1_LOW_DTIME, &pctx)) { 998 inode->i_dtime = inode->i_links_count ? 999 0 : ctx->now; 1000 e2fsck_write_inode(ctx, ino, inode, 1001 "pass1"); 1002 } 1003 } 1004 1005 /* 1006 * This code assumes that deleted inodes have 1007 * i_links_count set to 0. 1008 */ 1009 if (!inode->i_links_count) { 1010 if (!inode->i_dtime && inode->i_mode) { 1011 if (fix_problem(ctx, 1012 PR_1_ZERO_DTIME, &pctx)) { 1013 inode->i_dtime = ctx->now; 1014 e2fsck_write_inode(ctx, ino, inode, 1015 "pass1"); 1016 } 1017 } 1018 continue; 1019 } 1020 /* 1021 * n.b. 0.3c ext2fs code didn't clear i_links_count for 1022 * deleted files. Oops. 1023 * 1024 * Since all new ext2 implementations get this right, 1025 * we now assume that the case of non-zero 1026 * i_links_count and non-zero dtime means that we 1027 * should keep the file, not delete it. 1028 * 1029 */ 1030 if (inode->i_dtime) { 1031 if (fix_problem(ctx, PR_1_SET_DTIME, &pctx)) { 1032 inode->i_dtime = 0; 1033 e2fsck_write_inode(ctx, ino, inode, "pass1"); 1034 } 1035 } 1036 1037 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino); 1038 switch (fs->super->s_creator_os) { 1039 case EXT2_OS_HURD: 1040 frag = inode->osd2.hurd2.h_i_frag; 1041 fsize = inode->osd2.hurd2.h_i_fsize; 1042 break; 1043 default: 1044 frag = fsize = 0; 1045 } 1046 1047 if (inode->i_faddr || frag || fsize || 1048 (LINUX_S_ISDIR(inode->i_mode) && inode->i_dir_acl)) 1049 mark_inode_bad(ctx, ino); 1050 if (!(fs->super->s_feature_incompat & 1051 EXT4_FEATURE_INCOMPAT_64BIT) && 1052 inode->osd2.linux2.l_i_file_acl_high != 0) 1053 mark_inode_bad(ctx, ino); 1054 if ((fs->super->s_creator_os == EXT2_OS_LINUX) && 1055 !(fs->super->s_feature_ro_compat & 1056 EXT4_FEATURE_RO_COMPAT_HUGE_FILE) && 1057 (inode->osd2.linux2.l_i_blocks_hi != 0)) 1058 mark_inode_bad(ctx, ino); 1059 if (inode->i_flags & EXT2_IMAGIC_FL) { 1060 if (imagic_fs) { 1061 if (!ctx->inode_imagic_map) 1062 alloc_imagic_map(ctx); 1063 ext2fs_mark_inode_bitmap2(ctx->inode_imagic_map, 1064 ino); 1065 } else { 1066 if (fix_problem(ctx, PR_1_SET_IMAGIC, &pctx)) { 1067 inode->i_flags &= ~EXT2_IMAGIC_FL; 1068 e2fsck_write_inode(ctx, ino, 1069 inode, "pass1"); 1070 } 1071 } 1072 } 1073 1074 check_inode_extra_space(ctx, &pctx); 1075 check_is_really_dir(ctx, &pctx, block_buf); 1076 1077 /* 1078 * ext2fs_inode_has_valid_blocks2 does not actually look 1079 * at i_block[] values, so not endian-sensitive here. 1080 */ 1081 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL) && 1082 LINUX_S_ISLNK(inode->i_mode) && 1083 !ext2fs_inode_has_valid_blocks2(fs, inode) && 1084 fix_problem(ctx, PR_1_FAST_SYMLINK_EXTENT_FL, &pctx)) { 1085 inode->i_flags &= ~EXT4_EXTENTS_FL; 1086 e2fsck_write_inode(ctx, ino, inode, "pass1"); 1087 } 1088 1089 if (LINUX_S_ISDIR(inode->i_mode)) { 1090 ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino); 1091 e2fsck_add_dir_info(ctx, ino, 0); 1092 ctx->fs_directory_count++; 1093 } else if (LINUX_S_ISREG (inode->i_mode)) { 1094 ext2fs_mark_inode_bitmap2(ctx->inode_reg_map, ino); 1095 ctx->fs_regular_count++; 1096 } else if (LINUX_S_ISCHR (inode->i_mode) && 1097 e2fsck_pass1_check_device_inode(fs, inode)) { 1098 check_immutable(ctx, &pctx); 1099 check_size(ctx, &pctx); 1100 ctx->fs_chardev_count++; 1101 } else if (LINUX_S_ISBLK (inode->i_mode) && 1102 e2fsck_pass1_check_device_inode(fs, inode)) { 1103 check_immutable(ctx, &pctx); 1104 check_size(ctx, &pctx); 1105 ctx->fs_blockdev_count++; 1106 } else if (LINUX_S_ISLNK (inode->i_mode) && 1107 e2fsck_pass1_check_symlink(fs, ino, inode, 1108 block_buf)) { 1109 check_immutable(ctx, &pctx); 1110 ctx->fs_symlinks_count++; 1111 if (ext2fs_inode_data_blocks(fs, inode) == 0) { 1112 ctx->fs_fast_symlinks_count++; 1113 check_blocks(ctx, &pctx, block_buf); 1114 continue; 1115 } 1116 } 1117 else if (LINUX_S_ISFIFO (inode->i_mode) && 1118 e2fsck_pass1_check_device_inode(fs, inode)) { 1119 check_immutable(ctx, &pctx); 1120 check_size(ctx, &pctx); 1121 ctx->fs_fifo_count++; 1122 } else if ((LINUX_S_ISSOCK (inode->i_mode)) && 1123 e2fsck_pass1_check_device_inode(fs, inode)) { 1124 check_immutable(ctx, &pctx); 1125 check_size(ctx, &pctx); 1126 ctx->fs_sockets_count++; 1127 } else 1128 mark_inode_bad(ctx, ino); 1129 if (!(inode->i_flags & EXT4_EXTENTS_FL)) { 1130 if (inode->i_block[EXT2_IND_BLOCK]) 1131 ctx->fs_ind_count++; 1132 if (inode->i_block[EXT2_DIND_BLOCK]) 1133 ctx->fs_dind_count++; 1134 if (inode->i_block[EXT2_TIND_BLOCK]) 1135 ctx->fs_tind_count++; 1136 } 1137 if (!(inode->i_flags & EXT4_EXTENTS_FL) && 1138 (inode->i_block[EXT2_IND_BLOCK] || 1139 inode->i_block[EXT2_DIND_BLOCK] || 1140 inode->i_block[EXT2_TIND_BLOCK] || 1141 ext2fs_file_acl_block(fs, inode))) { 1142 inodes_to_process[process_inode_count].ino = ino; 1143 inodes_to_process[process_inode_count].inode = *inode; 1144 process_inode_count++; 1145 } else 1146 check_blocks(ctx, &pctx, block_buf); 1147 1148 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 1149 return; 1150 1151 if (process_inode_count >= ctx->process_inode_size) { 1152 process_inodes(ctx, block_buf); 1153 1154 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 1155 return; 1156 } 1157 } 1158 process_inodes(ctx, block_buf); 1159 ext2fs_close_inode_scan(scan); 1160 1161 /* 1162 * If any extended attribute blocks' reference counts need to 1163 * be adjusted, either up (ctx->refcount_extra), or down 1164 * (ctx->refcount), then fix them. 1165 */ 1166 if (ctx->refcount) { 1167 adjust_extattr_refcount(ctx, ctx->refcount, block_buf, -1); 1168 ea_refcount_free(ctx->refcount); 1169 ctx->refcount = 0; 1170 } 1171 if (ctx->refcount_extra) { 1172 adjust_extattr_refcount(ctx, ctx->refcount_extra, 1173 block_buf, +1); 1174 ea_refcount_free(ctx->refcount_extra); 1175 ctx->refcount_extra = 0; 1176 } 1177 1178 if (ctx->invalid_bitmaps) 1179 handle_fs_bad_blocks(ctx); 1180 1181 /* We don't need the block_ea_map any more */ 1182 if (ctx->block_ea_map) { 1183 ext2fs_free_block_bitmap(ctx->block_ea_map); 1184 ctx->block_ea_map = 0; 1185 } 1186 1187 if (ctx->flags & E2F_FLAG_RESIZE_INODE) { 1188 ext2fs_block_bitmap save_bmap; 1189 1190 save_bmap = fs->block_map; 1191 fs->block_map = ctx->block_found_map; 1192 clear_problem_context(&pctx); 1193 pctx.errcode = ext2fs_create_resize_inode(fs); 1194 if (pctx.errcode) { 1195 if (!fix_problem(ctx, PR_1_RESIZE_INODE_CREATE, 1196 &pctx)) { 1197 ctx->flags |= E2F_FLAG_ABORT; 1198 return; 1199 } 1200 pctx.errcode = 0; 1201 } 1202 if (!pctx.errcode) { 1203 e2fsck_read_inode(ctx, EXT2_RESIZE_INO, inode, 1204 "recreate inode"); 1205 inode->i_mtime = ctx->now; 1206 e2fsck_write_inode(ctx, EXT2_RESIZE_INO, inode, 1207 "recreate inode"); 1208 } 1209 fs->block_map = save_bmap; 1210 ctx->flags &= ~E2F_FLAG_RESIZE_INODE; 1211 } 1212 1213 if (ctx->flags & E2F_FLAG_RESTART) { 1214 /* 1215 * Only the master copy of the superblock and block 1216 * group descriptors are going to be written during a 1217 * restart, so set the superblock to be used to be the 1218 * master superblock. 1219 */ 1220 ctx->use_superblock = 0; 1221 unwind_pass1(fs); 1222 goto endit; 1223 } 1224 1225 if (ctx->block_dup_map) { 1226 if (ctx->options & E2F_OPT_PREEN) { 1227 clear_problem_context(&pctx); 1228 fix_problem(ctx, PR_1_DUP_BLOCKS_PREENSTOP, &pctx); 1229 } 1230 e2fsck_pass1_dupblocks(ctx, block_buf); 1231 } 1232 ext2fs_free_mem(&inodes_to_process); 1233endit: 1234 e2fsck_use_inode_shortcuts(ctx, 0); 1235 1236 ext2fs_free_mem(&block_buf); 1237 ext2fs_free_mem(&inode); 1238 1239 print_resource_track(ctx, _("Pass 1"), &rtrack, ctx->fs->io); 1240} 1241 1242/* 1243 * When the inode_scan routines call this callback at the end of the 1244 * glock group, call process_inodes. 1245 */ 1246static errcode_t scan_callback(ext2_filsys fs, 1247 ext2_inode_scan scan EXT2FS_ATTR((unused)), 1248 dgrp_t group, void * priv_data) 1249{ 1250 struct scan_callback_struct *scan_struct; 1251 e2fsck_t ctx; 1252 1253 scan_struct = (struct scan_callback_struct *) priv_data; 1254 ctx = scan_struct->ctx; 1255 1256 process_inodes((e2fsck_t) fs->priv_data, scan_struct->block_buf); 1257 1258 if (ctx->progress) 1259 if ((ctx->progress)(ctx, 1, group+1, 1260 ctx->fs->group_desc_count)) 1261 return EXT2_ET_CANCEL_REQUESTED; 1262 1263 return 0; 1264} 1265 1266/* 1267 * Process the inodes in the "inodes to process" list. 1268 */ 1269static void process_inodes(e2fsck_t ctx, char *block_buf) 1270{ 1271 int i; 1272 struct ext2_inode *old_stashed_inode; 1273 ext2_ino_t old_stashed_ino; 1274 const char *old_operation; 1275 char buf[80]; 1276 struct problem_context pctx; 1277 1278#if 0 1279 printf("begin process_inodes: "); 1280#endif 1281 if (process_inode_count == 0) 1282 return; 1283 old_operation = ehandler_operation(0); 1284 old_stashed_inode = ctx->stashed_inode; 1285 old_stashed_ino = ctx->stashed_ino; 1286 qsort(inodes_to_process, process_inode_count, 1287 sizeof(struct process_inode_block), process_inode_cmp); 1288 clear_problem_context(&pctx); 1289 for (i=0; i < process_inode_count; i++) { 1290 pctx.inode = ctx->stashed_inode = &inodes_to_process[i].inode; 1291 pctx.ino = ctx->stashed_ino = inodes_to_process[i].ino; 1292 1293#if 0 1294 printf("%u ", pctx.ino); 1295#endif 1296 sprintf(buf, _("reading indirect blocks of inode %u"), 1297 pctx.ino); 1298 ehandler_operation(buf); 1299 check_blocks(ctx, &pctx, block_buf); 1300 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 1301 break; 1302 } 1303 ctx->stashed_inode = old_stashed_inode; 1304 ctx->stashed_ino = old_stashed_ino; 1305 process_inode_count = 0; 1306#if 0 1307 printf("end process inodes\n"); 1308#endif 1309 ehandler_operation(old_operation); 1310} 1311 1312static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b) 1313{ 1314 const struct process_inode_block *ib_a = 1315 (const struct process_inode_block *) a; 1316 const struct process_inode_block *ib_b = 1317 (const struct process_inode_block *) b; 1318 int ret; 1319 1320 ret = (ib_a->inode.i_block[EXT2_IND_BLOCK] - 1321 ib_b->inode.i_block[EXT2_IND_BLOCK]); 1322 if (ret == 0) 1323 /* 1324 * We only call process_inodes() for non-extent 1325 * inodes, so it's OK to pass NULL to 1326 * ext2fs_file_acl_block() here. 1327 */ 1328 ret = ext2fs_file_acl_block(0, &(ib_a->inode)) - 1329 ext2fs_file_acl_block(0, &(ib_b->inode)); 1330 if (ret == 0) 1331 ret = ib_a->ino - ib_b->ino; 1332 return ret; 1333} 1334 1335/* 1336 * Mark an inode as being bad in some what 1337 */ 1338static void mark_inode_bad(e2fsck_t ctx, ino_t ino) 1339{ 1340 struct problem_context pctx; 1341 1342 if (!ctx->inode_bad_map) { 1343 clear_problem_context(&pctx); 1344 1345 pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs, 1346 _("bad inode map"), EXT2FS_BMAP64_RBTREE, 1347 "inode_bad_map", &ctx->inode_bad_map); 1348 if (pctx.errcode) { 1349 pctx.num = 3; 1350 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx); 1351 /* Should never get here */ 1352 ctx->flags |= E2F_FLAG_ABORT; 1353 return; 1354 } 1355 } 1356 ext2fs_mark_inode_bitmap2(ctx->inode_bad_map, ino); 1357} 1358 1359 1360/* 1361 * This procedure will allocate the inode "bb" (badblock) map table 1362 */ 1363static void alloc_bb_map(e2fsck_t ctx) 1364{ 1365 struct problem_context pctx; 1366 1367 clear_problem_context(&pctx); 1368 pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs, 1369 _("inode in bad block map"), EXT2FS_BMAP64_RBTREE, 1370 "inode_bb_map", &ctx->inode_bb_map); 1371 if (pctx.errcode) { 1372 pctx.num = 4; 1373 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx); 1374 /* Should never get here */ 1375 ctx->flags |= E2F_FLAG_ABORT; 1376 return; 1377 } 1378} 1379 1380/* 1381 * This procedure will allocate the inode imagic table 1382 */ 1383static void alloc_imagic_map(e2fsck_t ctx) 1384{ 1385 struct problem_context pctx; 1386 1387 clear_problem_context(&pctx); 1388 pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs, 1389 _("imagic inode map"), EXT2FS_BMAP64_RBTREE, 1390 "inode_imagic_map", &ctx->inode_imagic_map); 1391 if (pctx.errcode) { 1392 pctx.num = 5; 1393 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx); 1394 /* Should never get here */ 1395 ctx->flags |= E2F_FLAG_ABORT; 1396 return; 1397 } 1398} 1399 1400/* 1401 * Marks a block as in use, setting the dup_map if it's been set 1402 * already. Called by process_block and process_bad_block. 1403 * 1404 * WARNING: Assumes checks have already been done to make sure block 1405 * is valid. This is true in both process_block and process_bad_block. 1406 */ 1407static _INLINE_ void mark_block_used(e2fsck_t ctx, blk64_t block) 1408{ 1409 struct problem_context pctx; 1410 1411 clear_problem_context(&pctx); 1412 1413 if (ext2fs_fast_test_block_bitmap2(ctx->block_found_map, block)) { 1414 if (!ctx->block_dup_map) { 1415 pctx.errcode = e2fsck_allocate_block_bitmap(ctx->fs, 1416 _("multiply claimed block map"), 1417 EXT2FS_BMAP64_RBTREE, "block_dup_map", 1418 &ctx->block_dup_map); 1419 if (pctx.errcode) { 1420 pctx.num = 3; 1421 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, 1422 &pctx); 1423 /* Should never get here */ 1424 ctx->flags |= E2F_FLAG_ABORT; 1425 return; 1426 } 1427 } 1428 ext2fs_fast_mark_block_bitmap2(ctx->block_dup_map, block); 1429 } else { 1430 ext2fs_fast_mark_block_bitmap2(ctx->block_found_map, block); 1431 } 1432} 1433 1434static _INLINE_ void mark_blocks_used(e2fsck_t ctx, blk64_t block, 1435 unsigned int num) 1436{ 1437 if (ext2fs_test_block_bitmap_range2(ctx->block_found_map, block, num)) 1438 ext2fs_mark_block_bitmap_range2(ctx->block_found_map, block, num); 1439 else 1440 while (num--) 1441 mark_block_used(ctx, block++); 1442} 1443 1444/* 1445 * Adjust the extended attribute block's reference counts at the end 1446 * of pass 1, either by subtracting out references for EA blocks that 1447 * are still referenced in ctx->refcount, or by adding references for 1448 * EA blocks that had extra references as accounted for in 1449 * ctx->refcount_extra. 1450 */ 1451static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount, 1452 char *block_buf, int adjust_sign) 1453{ 1454 struct ext2_ext_attr_header *header; 1455 struct problem_context pctx; 1456 ext2_filsys fs = ctx->fs; 1457 blk64_t blk; 1458 __u32 should_be; 1459 int count; 1460 1461 clear_problem_context(&pctx); 1462 1463 ea_refcount_intr_begin(refcount); 1464 while (1) { 1465 if ((blk = ea_refcount_intr_next(refcount, &count)) == 0) 1466 break; 1467 pctx.blk = blk; 1468 pctx.errcode = ext2fs_read_ext_attr2(fs, blk, block_buf); 1469 if (pctx.errcode) { 1470 fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx); 1471 return; 1472 } 1473 header = (struct ext2_ext_attr_header *) block_buf; 1474 pctx.blkcount = header->h_refcount; 1475 should_be = header->h_refcount + adjust_sign * count; 1476 pctx.num = should_be; 1477 if (fix_problem(ctx, PR_1_EXTATTR_REFCOUNT, &pctx)) { 1478 header->h_refcount = should_be; 1479 pctx.errcode = ext2fs_write_ext_attr2(fs, blk, 1480 block_buf); 1481 if (pctx.errcode) { 1482 fix_problem(ctx, PR_1_EXTATTR_WRITE_ABORT, 1483 &pctx); 1484 continue; 1485 } 1486 } 1487 } 1488} 1489 1490/* 1491 * Handle processing the extended attribute blocks 1492 */ 1493static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx, 1494 char *block_buf) 1495{ 1496 ext2_filsys fs = ctx->fs; 1497 ext2_ino_t ino = pctx->ino; 1498 struct ext2_inode *inode = pctx->inode; 1499 blk64_t blk; 1500 char * end; 1501 struct ext2_ext_attr_header *header; 1502 struct ext2_ext_attr_entry *entry; 1503 int count; 1504 region_t region = 0; 1505 1506 blk = ext2fs_file_acl_block(fs, inode); 1507 if (blk == 0) 1508 return 0; 1509 1510 /* 1511 * If the Extended attribute flag isn't set, then a non-zero 1512 * file acl means that the inode is corrupted. 1513 * 1514 * Or if the extended attribute block is an invalid block, 1515 * then the inode is also corrupted. 1516 */ 1517 if (!(fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_EXT_ATTR) || 1518 (blk < fs->super->s_first_data_block) || 1519 (blk >= ext2fs_blocks_count(fs->super))) { 1520 mark_inode_bad(ctx, ino); 1521 return 0; 1522 } 1523 1524 /* If ea bitmap hasn't been allocated, create it */ 1525 if (!ctx->block_ea_map) { 1526 pctx->errcode = e2fsck_allocate_block_bitmap(fs, 1527 _("ext attr block map"), 1528 EXT2FS_BMAP64_RBTREE, "block_ea_map", 1529 &ctx->block_ea_map); 1530 if (pctx->errcode) { 1531 pctx->num = 2; 1532 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, pctx); 1533 ctx->flags |= E2F_FLAG_ABORT; 1534 return 0; 1535 } 1536 } 1537 1538 /* Create the EA refcount structure if necessary */ 1539 if (!ctx->refcount) { 1540 pctx->errcode = ea_refcount_create(0, &ctx->refcount); 1541 if (pctx->errcode) { 1542 pctx->num = 1; 1543 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx); 1544 ctx->flags |= E2F_FLAG_ABORT; 1545 return 0; 1546 } 1547 } 1548 1549#if 0 1550 /* Debugging text */ 1551 printf("Inode %u has EA block %u\n", ino, blk); 1552#endif 1553 1554 /* Have we seen this EA block before? */ 1555 if (ext2fs_fast_test_block_bitmap2(ctx->block_ea_map, blk)) { 1556 if (ea_refcount_decrement(ctx->refcount, blk, 0) == 0) 1557 return 1; 1558 /* Ooops, this EA was referenced more than it stated */ 1559 if (!ctx->refcount_extra) { 1560 pctx->errcode = ea_refcount_create(0, 1561 &ctx->refcount_extra); 1562 if (pctx->errcode) { 1563 pctx->num = 2; 1564 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx); 1565 ctx->flags |= E2F_FLAG_ABORT; 1566 return 0; 1567 } 1568 } 1569 ea_refcount_increment(ctx->refcount_extra, blk, 0); 1570 return 1; 1571 } 1572 1573 /* 1574 * OK, we haven't seen this EA block yet. So we need to 1575 * validate it 1576 */ 1577 pctx->blk = blk; 1578 pctx->errcode = ext2fs_read_ext_attr2(fs, blk, block_buf); 1579 if (pctx->errcode && fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx)) 1580 goto clear_extattr; 1581 header = (struct ext2_ext_attr_header *) block_buf; 1582 pctx->blk = ext2fs_file_acl_block(fs, inode); 1583 if (((ctx->ext_attr_ver == 1) && 1584 (header->h_magic != EXT2_EXT_ATTR_MAGIC_v1)) || 1585 ((ctx->ext_attr_ver == 2) && 1586 (header->h_magic != EXT2_EXT_ATTR_MAGIC))) { 1587 if (fix_problem(ctx, PR_1_BAD_EA_BLOCK, pctx)) 1588 goto clear_extattr; 1589 } 1590 1591 if (header->h_blocks != 1) { 1592 if (fix_problem(ctx, PR_1_EA_MULTI_BLOCK, pctx)) 1593 goto clear_extattr; 1594 } 1595 1596 region = region_create(0, fs->blocksize); 1597 if (!region) { 1598 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx); 1599 ctx->flags |= E2F_FLAG_ABORT; 1600 return 0; 1601 } 1602 if (region_allocate(region, 0, sizeof(struct ext2_ext_attr_header))) { 1603 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx)) 1604 goto clear_extattr; 1605 } 1606 1607 entry = (struct ext2_ext_attr_entry *)(header+1); 1608 end = block_buf + fs->blocksize; 1609 while ((char *)entry < end && *(__u32 *)entry) { 1610 __u32 hash; 1611 1612 if (region_allocate(region, (char *)entry - (char *)header, 1613 EXT2_EXT_ATTR_LEN(entry->e_name_len))) { 1614 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx)) 1615 goto clear_extattr; 1616 break; 1617 } 1618 if ((ctx->ext_attr_ver == 1 && 1619 (entry->e_name_len == 0 || entry->e_name_index != 0)) || 1620 (ctx->ext_attr_ver == 2 && 1621 entry->e_name_index == 0)) { 1622 if (fix_problem(ctx, PR_1_EA_BAD_NAME, pctx)) 1623 goto clear_extattr; 1624 break; 1625 } 1626 if (entry->e_value_block != 0) { 1627 if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx)) 1628 goto clear_extattr; 1629 } 1630 if (entry->e_value_offs + entry->e_value_size > fs->blocksize) { 1631 if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx)) 1632 goto clear_extattr; 1633 break; 1634 } 1635 if (entry->e_value_size && 1636 region_allocate(region, entry->e_value_offs, 1637 EXT2_EXT_ATTR_SIZE(entry->e_value_size))) { 1638 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx)) 1639 goto clear_extattr; 1640 } 1641 1642 hash = ext2fs_ext_attr_hash_entry(entry, block_buf + 1643 entry->e_value_offs); 1644 1645 if (entry->e_hash != hash) { 1646 pctx->num = entry->e_hash; 1647 if (fix_problem(ctx, PR_1_ATTR_HASH, pctx)) 1648 goto clear_extattr; 1649 entry->e_hash = hash; 1650 } 1651 1652 entry = EXT2_EXT_ATTR_NEXT(entry); 1653 } 1654 if (region_allocate(region, (char *)entry - (char *)header, 4)) { 1655 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx)) 1656 goto clear_extattr; 1657 } 1658 region_free(region); 1659 1660 count = header->h_refcount - 1; 1661 if (count) 1662 ea_refcount_store(ctx->refcount, blk, count); 1663 mark_block_used(ctx, blk); 1664 ext2fs_fast_mark_block_bitmap2(ctx->block_ea_map, blk); 1665 return 1; 1666 1667clear_extattr: 1668 if (region) 1669 region_free(region); 1670 ext2fs_file_acl_block_set(fs, inode, 0); 1671 e2fsck_write_inode(ctx, ino, inode, "check_ext_attr"); 1672 return 0; 1673} 1674 1675/* Returns 1 if bad htree, 0 if OK */ 1676static int handle_htree(e2fsck_t ctx, struct problem_context *pctx, 1677 ext2_ino_t ino, struct ext2_inode *inode, 1678 char *block_buf) 1679{ 1680 struct ext2_dx_root_info *root; 1681 ext2_filsys fs = ctx->fs; 1682 errcode_t retval; 1683 blk64_t blk; 1684 1685 if ((!LINUX_S_ISDIR(inode->i_mode) && 1686 fix_problem(ctx, PR_1_HTREE_NODIR, pctx)) || 1687 (!(fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) && 1688 fix_problem(ctx, PR_1_HTREE_SET, pctx))) 1689 return 1; 1690 1691 pctx->errcode = ext2fs_bmap2(fs, ino, inode, 0, 0, 0, 0, &blk); 1692 1693 if ((pctx->errcode) || 1694 (blk == 0) || 1695 (blk < fs->super->s_first_data_block) || 1696 (blk >= ext2fs_blocks_count(fs->super))) { 1697 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx)) 1698 return 1; 1699 else 1700 return 0; 1701 } 1702 1703 retval = io_channel_read_blk64(fs->io, blk, 1, block_buf); 1704 if (retval && fix_problem(ctx, PR_1_HTREE_BADROOT, pctx)) 1705 return 1; 1706 1707 /* XXX should check that beginning matches a directory */ 1708 root = (struct ext2_dx_root_info *) (block_buf + 24); 1709 1710 if ((root->reserved_zero || root->info_length < 8) && 1711 fix_problem(ctx, PR_1_HTREE_BADROOT, pctx)) 1712 return 1; 1713 1714 pctx->num = root->hash_version; 1715 if ((root->hash_version != EXT2_HASH_LEGACY) && 1716 (root->hash_version != EXT2_HASH_HALF_MD4) && 1717 (root->hash_version != EXT2_HASH_TEA) && 1718 fix_problem(ctx, PR_1_HTREE_HASHV, pctx)) 1719 return 1; 1720 1721 if ((root->unused_flags & EXT2_HASH_FLAG_INCOMPAT) && 1722 fix_problem(ctx, PR_1_HTREE_INCOMPAT, pctx)) 1723 return 1; 1724 1725 pctx->num = root->indirect_levels; 1726 if ((root->indirect_levels > 1) && 1727 fix_problem(ctx, PR_1_HTREE_DEPTH, pctx)) 1728 return 1; 1729 1730 return 0; 1731} 1732 1733void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino, 1734 struct ext2_inode *inode, int restart_flag, 1735 const char *source) 1736{ 1737 inode->i_flags = 0; 1738 inode->i_links_count = 0; 1739 ext2fs_icount_store(ctx->inode_link_info, ino, 0); 1740 inode->i_dtime = ctx->now; 1741 1742 ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino); 1743 ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino); 1744 if (ctx->inode_reg_map) 1745 ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino); 1746 if (ctx->inode_bad_map) 1747 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino); 1748 1749 /* 1750 * If the inode was partially accounted for before processing 1751 * was aborted, we need to restart the pass 1 scan. 1752 */ 1753 ctx->flags |= restart_flag; 1754 1755 if (ino == EXT2_BAD_INO) 1756 memset(inode, 0, sizeof(struct ext2_inode)); 1757 1758 e2fsck_write_inode(ctx, ino, inode, source); 1759} 1760 1761static void scan_extent_node(e2fsck_t ctx, struct problem_context *pctx, 1762 struct process_block_struct *pb, 1763 blk64_t start_block, 1764 ext2_extent_handle_t ehandle) 1765{ 1766 struct ext2fs_extent extent; 1767 blk64_t blk; 1768 e2_blkcnt_t blockcnt; 1769 unsigned int i; 1770 int is_dir, is_leaf; 1771 errcode_t problem; 1772 struct ext2_extent_info info; 1773 1774 pctx->errcode = ext2fs_extent_get_info(ehandle, &info); 1775 if (pctx->errcode) 1776 return; 1777 1778 pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_FIRST_SIB, 1779 &extent); 1780 while (!pctx->errcode && info.num_entries-- > 0) { 1781 is_leaf = extent.e_flags & EXT2_EXTENT_FLAGS_LEAF; 1782 is_dir = LINUX_S_ISDIR(pctx->inode->i_mode); 1783 1784 problem = 0; 1785 if (extent.e_pblk == 0 || 1786 extent.e_pblk < ctx->fs->super->s_first_data_block || 1787 extent.e_pblk >= ext2fs_blocks_count(ctx->fs->super)) 1788 problem = PR_1_EXTENT_BAD_START_BLK; 1789 else if (extent.e_lblk < start_block) 1790 problem = PR_1_OUT_OF_ORDER_EXTENTS; 1791 else if (is_leaf && extent.e_len == 0) 1792 problem = PR_1_EXTENT_LENGTH_ZERO; 1793 else if (is_leaf && 1794 (extent.e_pblk + extent.e_len) > 1795 ext2fs_blocks_count(ctx->fs->super)) 1796 problem = PR_1_EXTENT_ENDS_BEYOND; 1797 1798 if (problem) { 1799report_problem: 1800 pctx->blk = extent.e_pblk; 1801 pctx->blk2 = extent.e_lblk; 1802 pctx->num = extent.e_len; 1803 if (fix_problem(ctx, problem, pctx)) { 1804 e2fsck_read_bitmaps(ctx); 1805 pctx->errcode = 1806 ext2fs_extent_delete(ehandle, 0); 1807 if (pctx->errcode) { 1808 pctx->str = "ext2fs_extent_delete"; 1809 return; 1810 } 1811 ext2fs_extent_fix_parents(ehandle); 1812 pctx->errcode = ext2fs_extent_get(ehandle, 1813 EXT2_EXTENT_CURRENT, 1814 &extent); 1815 if (pctx->errcode == EXT2_ET_NO_CURRENT_NODE) { 1816 pctx->errcode = 0; 1817 break; 1818 } 1819 continue; 1820 } 1821 goto next; 1822 } 1823 1824 if (!is_leaf) { 1825 blk64_t lblk; 1826 1827 blk = extent.e_pblk; 1828 lblk = extent.e_lblk; 1829 pctx->errcode = ext2fs_extent_get(ehandle, 1830 EXT2_EXTENT_DOWN, &extent); 1831 if (pctx->errcode) { 1832 pctx->str = "EXT2_EXTENT_DOWN"; 1833 problem = PR_1_EXTENT_HEADER_INVALID; 1834 if (pctx->errcode == EXT2_ET_EXTENT_HEADER_BAD) 1835 goto report_problem; 1836 return; 1837 } 1838 /* The next extent should match this index's logical start */ 1839 if (extent.e_lblk != lblk) { 1840 struct ext2_extent_info e_info; 1841 1842 ext2fs_extent_get_info(ehandle, &e_info); 1843 pctx->blk = lblk; 1844 pctx->blk2 = extent.e_lblk; 1845 pctx->num = e_info.curr_level - 1; 1846 problem = PR_1_EXTENT_INDEX_START_INVALID; 1847 if (fix_problem(ctx, problem, pctx)) 1848 ext2fs_extent_fix_parents(ehandle); 1849 } 1850 scan_extent_node(ctx, pctx, pb, extent.e_lblk, ehandle); 1851 if (pctx->errcode) 1852 return; 1853 pctx->errcode = ext2fs_extent_get(ehandle, 1854 EXT2_EXTENT_UP, &extent); 1855 if (pctx->errcode) { 1856 pctx->str = "EXT2_EXTENT_UP"; 1857 return; 1858 } 1859 mark_block_used(ctx, blk); 1860 pb->num_blocks++; 1861 goto next; 1862 } 1863 1864 if ((pb->previous_block != 0) && 1865 (pb->previous_block+1 != extent.e_pblk)) { 1866 if (ctx->options & E2F_OPT_FRAGCHECK) { 1867 char type = '?'; 1868 1869 if (pb->is_dir) 1870 type = 'd'; 1871 else if (pb->is_reg) 1872 type = 'f'; 1873 1874 printf(("%6lu(%c): expecting %6lu " 1875 "actual extent " 1876 "phys %6lu log %lu len %lu\n"), 1877 (unsigned long) pctx->ino, type, 1878 (unsigned long) pb->previous_block+1, 1879 (unsigned long) extent.e_pblk, 1880 (unsigned long) extent.e_lblk, 1881 (unsigned long) extent.e_len); 1882 } 1883 pb->fragmented = 1; 1884 } 1885 while (is_dir && (++pb->last_db_block < 1886 (e2_blkcnt_t) extent.e_lblk)) { 1887 pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, 1888 pb->ino, 0, 1889 pb->last_db_block); 1890 if (pctx->errcode) { 1891 pctx->blk = 0; 1892 pctx->num = pb->last_db_block; 1893 goto failed_add_dir_block; 1894 } 1895 } 1896 if (!ctx->fs->cluster_ratio_bits) { 1897 mark_blocks_used(ctx, extent.e_pblk, extent.e_len); 1898 pb->num_blocks += extent.e_len; 1899 } 1900 for (blk = extent.e_pblk, blockcnt = extent.e_lblk, i = 0; 1901 i < extent.e_len; 1902 blk++, blockcnt++, i++) { 1903 if (ctx->fs->cluster_ratio_bits && 1904 !(pb->previous_block && 1905 (EXT2FS_B2C(ctx->fs, blk) == 1906 EXT2FS_B2C(ctx->fs, pb->previous_block)) && 1907 (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) == 1908 ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) { 1909 mark_block_used(ctx, blk); 1910 pb->num_blocks++; 1911 } 1912 1913 pb->previous_block = blk; 1914 1915 if (is_dir) { 1916 pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pctx->ino, blk, blockcnt); 1917 if (pctx->errcode) { 1918 pctx->blk = blk; 1919 pctx->num = blockcnt; 1920 failed_add_dir_block: 1921 fix_problem(ctx, PR_1_ADD_DBLOCK, pctx); 1922 /* Should never get here */ 1923 ctx->flags |= E2F_FLAG_ABORT; 1924 return; 1925 } 1926 } 1927 } 1928 if (is_dir && extent.e_len > 0) 1929 pb->last_db_block = blockcnt - 1; 1930 pb->previous_block = extent.e_pblk + extent.e_len - 1; 1931 start_block = pb->last_block = extent.e_lblk + extent.e_len - 1; 1932 if (is_leaf && !is_dir && 1933 !(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT)) 1934 pb->last_init_lblock = extent.e_lblk + extent.e_len - 1; 1935 next: 1936 pctx->errcode = ext2fs_extent_get(ehandle, 1937 EXT2_EXTENT_NEXT_SIB, 1938 &extent); 1939 } 1940 if (pctx->errcode == EXT2_ET_EXTENT_NO_NEXT) 1941 pctx->errcode = 0; 1942} 1943 1944static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx, 1945 struct process_block_struct *pb) 1946{ 1947 struct ext2_extent_info info; 1948 struct ext2_inode *inode = pctx->inode; 1949 ext2_extent_handle_t ehandle; 1950 ext2_filsys fs = ctx->fs; 1951 ext2_ino_t ino = pctx->ino; 1952 errcode_t retval; 1953 1954 pctx->errcode = ext2fs_extent_open2(fs, ino, inode, &ehandle); 1955 if (pctx->errcode) { 1956 if (fix_problem(ctx, PR_1_READ_EXTENT, pctx)) 1957 e2fsck_clear_inode(ctx, ino, inode, 0, 1958 "check_blocks_extents"); 1959 pctx->errcode = 0; 1960 return; 1961 } 1962 1963 retval = ext2fs_extent_get_info(ehandle, &info); 1964 if (retval == 0) { 1965 if (info.max_depth >= MAX_EXTENT_DEPTH_COUNT) 1966 info.max_depth = MAX_EXTENT_DEPTH_COUNT-1; 1967 ctx->extent_depth_count[info.max_depth]++; 1968 } 1969 1970 scan_extent_node(ctx, pctx, pb, 0, ehandle); 1971 if (pctx->errcode && 1972 fix_problem(ctx, PR_1_EXTENT_ITERATE_FAILURE, pctx)) { 1973 pb->num_blocks = 0; 1974 inode->i_blocks = 0; 1975 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART, 1976 "check_blocks_extents"); 1977 pctx->errcode = 0; 1978 } 1979 ext2fs_extent_free(ehandle); 1980} 1981 1982/* 1983 * This subroutine is called on each inode to account for all of the 1984 * blocks used by that inode. 1985 */ 1986static void check_blocks(e2fsck_t ctx, struct problem_context *pctx, 1987 char *block_buf) 1988{ 1989 ext2_filsys fs = ctx->fs; 1990 struct process_block_struct pb; 1991 ext2_ino_t ino = pctx->ino; 1992 struct ext2_inode *inode = pctx->inode; 1993 int bad_size = 0; 1994 int dirty_inode = 0; 1995 int extent_fs; 1996 __u64 size; 1997 1998 pb.ino = ino; 1999 pb.num_blocks = 0; 2000 pb.last_block = -1; 2001 pb.last_init_lblock = -1; 2002 pb.last_db_block = -1; 2003 pb.num_illegal_blocks = 0; 2004 pb.suppress = 0; pb.clear = 0; 2005 pb.fragmented = 0; 2006 pb.compressed = 0; 2007 pb.previous_block = 0; 2008 pb.is_dir = LINUX_S_ISDIR(inode->i_mode); 2009 pb.is_reg = LINUX_S_ISREG(inode->i_mode); 2010 pb.max_blocks = 1 << (31 - fs->super->s_log_block_size); 2011 pb.inode = inode; 2012 pb.pctx = pctx; 2013 pb.ctx = ctx; 2014 pctx->ino = ino; 2015 pctx->errcode = 0; 2016 2017 extent_fs = (ctx->fs->super->s_feature_incompat & 2018 EXT3_FEATURE_INCOMPAT_EXTENTS); 2019 2020 if (inode->i_flags & EXT2_COMPRBLK_FL) { 2021 if (fs->super->s_feature_incompat & 2022 EXT2_FEATURE_INCOMPAT_COMPRESSION) 2023 pb.compressed = 1; 2024 else { 2025 if (fix_problem(ctx, PR_1_COMPR_SET, pctx)) { 2026 inode->i_flags &= ~EXT2_COMPRBLK_FL; 2027 dirty_inode++; 2028 } 2029 } 2030 } 2031 2032 if (ext2fs_file_acl_block(fs, inode) && 2033 check_ext_attr(ctx, pctx, block_buf)) { 2034 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 2035 goto out; 2036 pb.num_blocks++; 2037 } 2038 2039 if (ext2fs_inode_has_valid_blocks2(fs, inode)) { 2040 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) 2041 check_blocks_extents(ctx, pctx, &pb); 2042 else { 2043 pctx->errcode = ext2fs_block_iterate3(fs, ino, 2044 pb.is_dir ? BLOCK_FLAG_HOLE : 0, 2045 block_buf, process_block, &pb); 2046 /* 2047 * We do not have uninitialized extents in non extent 2048 * files. 2049 */ 2050 pb.last_init_lblock = pb.last_block; 2051 } 2052 } 2053 end_problem_latch(ctx, PR_LATCH_BLOCK); 2054 end_problem_latch(ctx, PR_LATCH_TOOBIG); 2055 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 2056 goto out; 2057 if (pctx->errcode) 2058 fix_problem(ctx, PR_1_BLOCK_ITERATE, pctx); 2059 2060 if (pb.fragmented && pb.num_blocks < fs->super->s_blocks_per_group) { 2061 if (LINUX_S_ISDIR(inode->i_mode)) 2062 ctx->fs_fragmented_dir++; 2063 else 2064 ctx->fs_fragmented++; 2065 } 2066 2067 if (pb.clear) { 2068 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART, 2069 "check_blocks"); 2070 return; 2071 } 2072 2073 if (inode->i_flags & EXT2_INDEX_FL) { 2074 if (handle_htree(ctx, pctx, ino, inode, block_buf)) { 2075 inode->i_flags &= ~EXT2_INDEX_FL; 2076 dirty_inode++; 2077 } else { 2078#ifdef ENABLE_HTREE 2079 e2fsck_add_dx_dir(ctx, ino, pb.last_block+1); 2080#endif 2081 } 2082 } 2083 2084 if (!pb.num_blocks && pb.is_dir) { 2085 if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) { 2086 e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks"); 2087 ctx->fs_directory_count--; 2088 return; 2089 } 2090 } 2091 2092 if (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super)) { 2093 quota_data_add(ctx->qctx, inode, ino, 2094 pb.num_blocks * fs->blocksize); 2095 quota_data_inodes(ctx->qctx, inode, ino, +1); 2096 } 2097 2098 if (!(fs->super->s_feature_ro_compat & 2099 EXT4_FEATURE_RO_COMPAT_HUGE_FILE) || 2100 !(inode->i_flags & EXT4_HUGE_FILE_FL)) 2101 pb.num_blocks *= (fs->blocksize / 512); 2102 pb.num_blocks *= EXT2FS_CLUSTER_RATIO(fs); 2103#if 0 2104 printf("inode %u, i_size = %u, last_block = %lld, i_blocks=%llu, num_blocks = %llu\n", 2105 ino, inode->i_size, pb.last_block, ext2fs_inode_i_blocks(fs, inode), 2106 pb.num_blocks); 2107#endif 2108 if (pb.is_dir) { 2109 int nblock = inode->i_size >> EXT2_BLOCK_SIZE_BITS(fs->super); 2110 if (inode->i_size & (fs->blocksize - 1)) 2111 bad_size = 5; 2112 else if (nblock > (pb.last_block + 1)) 2113 bad_size = 1; 2114 else if (nblock < (pb.last_block + 1)) { 2115 if (((pb.last_block + 1) - nblock) > 2116 fs->super->s_prealloc_dir_blocks) 2117 bad_size = 2; 2118 } 2119 } else { 2120 e2_blkcnt_t blkpg = ctx->blocks_per_page; 2121 2122 size = EXT2_I_SIZE(inode); 2123 if ((pb.last_init_lblock >= 0) && 2124 /* allow allocated blocks to end of PAGE_SIZE */ 2125 (size < (__u64)pb.last_init_lblock * fs->blocksize) && 2126 (pb.last_init_lblock / blkpg * blkpg != pb.last_init_lblock || 2127 size < (__u64)(pb.last_init_lblock & ~(blkpg-1)) * 2128 fs->blocksize)) 2129 bad_size = 3; 2130 else if (!(extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) && 2131 size > ext2_max_sizes[fs->super->s_log_block_size]) 2132 /* too big for a direct/indirect-mapped file */ 2133 bad_size = 4; 2134 else if ((extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) && 2135 size > 2136 ((1ULL << (32 + EXT2_BLOCK_SIZE_BITS(fs->super))) - 1)) 2137 /* too big for an extent-based file - 32bit ee_block */ 2138 bad_size = 6; 2139 } 2140 /* i_size for symlinks is checked elsewhere */ 2141 if (bad_size && !LINUX_S_ISLNK(inode->i_mode)) { 2142 pctx->num = (pb.last_block+1) * fs->blocksize; 2143 pctx->group = bad_size; 2144 if (fix_problem(ctx, PR_1_BAD_I_SIZE, pctx)) { 2145 inode->i_size = pctx->num; 2146 if (!LINUX_S_ISDIR(inode->i_mode)) 2147 inode->i_size_high = pctx->num >> 32; 2148 dirty_inode++; 2149 } 2150 pctx->num = 0; 2151 } 2152 if (LINUX_S_ISREG(inode->i_mode) && EXT2_I_SIZE(inode) >= 0x80000000UL) 2153 ctx->large_files++; 2154 if ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) || 2155 ((fs->super->s_feature_ro_compat & 2156 EXT4_FEATURE_RO_COMPAT_HUGE_FILE) && 2157 (inode->i_flags & EXT4_HUGE_FILE_FL) && 2158 (inode->osd2.linux2.l_i_blocks_hi != 0))) { 2159 pctx->num = pb.num_blocks; 2160 if (fix_problem(ctx, PR_1_BAD_I_BLOCKS, pctx)) { 2161 inode->i_blocks = pb.num_blocks; 2162 inode->osd2.linux2.l_i_blocks_hi = pb.num_blocks >> 32; 2163 dirty_inode++; 2164 } 2165 pctx->num = 0; 2166 } 2167 2168 if (ctx->dirs_to_hash && pb.is_dir && 2169 !(inode->i_flags & EXT2_INDEX_FL) && 2170 ((inode->i_size / fs->blocksize) >= 3)) 2171 ext2fs_u32_list_add(ctx->dirs_to_hash, ino); 2172 2173out: 2174 if (dirty_inode) 2175 e2fsck_write_inode(ctx, ino, inode, "check_blocks"); 2176} 2177 2178#if 0 2179/* 2180 * Helper function called by process block when an illegal block is 2181 * found. It returns a description about why the block is illegal 2182 */ 2183static char *describe_illegal_block(ext2_filsys fs, blk64_t block) 2184{ 2185 blk64_t super; 2186 int i; 2187 static char problem[80]; 2188 2189 super = fs->super->s_first_data_block; 2190 strcpy(problem, "PROGRAMMING ERROR: Unknown reason for illegal block"); 2191 if (block < super) { 2192 sprintf(problem, "< FIRSTBLOCK (%u)", super); 2193 return(problem); 2194 } else if (block >= ext2fs_blocks_count(fs->super)) { 2195 sprintf(problem, "> BLOCKS (%u)", ext2fs_blocks_count(fs->super)); 2196 return(problem); 2197 } 2198 for (i = 0; i < fs->group_desc_count; i++) { 2199 if (block == super) { 2200 sprintf(problem, "is the superblock in group %d", i); 2201 break; 2202 } 2203 if (block > super && 2204 block <= (super + fs->desc_blocks)) { 2205 sprintf(problem, "is in the group descriptors " 2206 "of group %d", i); 2207 break; 2208 } 2209 if (block == ext2fs_block_bitmap_loc(fs, i)) { 2210 sprintf(problem, "is the block bitmap of group %d", i); 2211 break; 2212 } 2213 if (block == ext2fs_inode_bitmap_loc(fs, i)) { 2214 sprintf(problem, "is the inode bitmap of group %d", i); 2215 break; 2216 } 2217 if (block >= ext2fs_inode_table_loc(fs, i) && 2218 (block < ext2fs_inode_table_loc(fs, i) 2219 + fs->inode_blocks_per_group)) { 2220 sprintf(problem, "is in the inode table of group %d", 2221 i); 2222 break; 2223 } 2224 super += fs->super->s_blocks_per_group; 2225 } 2226 return(problem); 2227} 2228#endif 2229 2230/* 2231 * This is a helper function for check_blocks(). 2232 */ 2233static int process_block(ext2_filsys fs, 2234 blk64_t *block_nr, 2235 e2_blkcnt_t blockcnt, 2236 blk64_t ref_block EXT2FS_ATTR((unused)), 2237 int ref_offset EXT2FS_ATTR((unused)), 2238 void *priv_data) 2239{ 2240 struct process_block_struct *p; 2241 struct problem_context *pctx; 2242 blk64_t blk = *block_nr; 2243 int ret_code = 0; 2244 int problem = 0; 2245 e2fsck_t ctx; 2246 2247 p = (struct process_block_struct *) priv_data; 2248 pctx = p->pctx; 2249 ctx = p->ctx; 2250 2251 if (p->compressed && (blk == EXT2FS_COMPRESSED_BLKADDR)) { 2252 /* todo: Check that the comprblk_fl is high, that the 2253 blkaddr pattern looks right (all non-holes up to 2254 first EXT2FS_COMPRESSED_BLKADDR, then all 2255 EXT2FS_COMPRESSED_BLKADDR up to end of cluster), 2256 that the feature_incompat bit is high, and that the 2257 inode is a regular file. If we're doing a "full 2258 check" (a concept introduced to e2fsck by e2compr, 2259 meaning that we look at data blocks as well as 2260 metadata) then call some library routine that 2261 checks the compressed data. I'll have to think 2262 about this, because one particularly important 2263 problem to be able to fix is to recalculate the 2264 cluster size if necessary. I think that perhaps 2265 we'd better do most/all e2compr-specific checks 2266 separately, after the non-e2compr checks. If not 2267 doing a full check, it may be useful to test that 2268 the personality is linux; e.g. if it isn't then 2269 perhaps this really is just an illegal block. */ 2270 return 0; 2271 } 2272 2273 if (blk == 0) 2274 return 0; 2275 2276#if 0 2277 printf("Process_block, inode %lu, block %u, #%d\n", p->ino, blk, 2278 blockcnt); 2279#endif 2280 2281 /* 2282 * Simplistic fragmentation check. We merely require that the 2283 * file be contiguous. (Which can never be true for really 2284 * big files that are greater than a block group.) 2285 */ 2286 if (!HOLE_BLKADDR(p->previous_block) && p->ino != EXT2_RESIZE_INO) { 2287 if (p->previous_block+1 != blk) { 2288 if (ctx->options & E2F_OPT_FRAGCHECK) { 2289 char type = '?'; 2290 2291 if (p->is_dir) 2292 type = 'd'; 2293 else if (p->is_reg) 2294 type = 'f'; 2295 2296 printf(_("%6lu(%c): expecting %6lu " 2297 "got phys %6lu (blkcnt %lld)\n"), 2298 (unsigned long) pctx->ino, type, 2299 (unsigned long) p->previous_block+1, 2300 (unsigned long) blk, 2301 blockcnt); 2302 } 2303 p->fragmented = 1; 2304 } 2305 } 2306 2307 if (p->is_dir && blockcnt > (1 << (21 - fs->super->s_log_block_size))) 2308 problem = PR_1_TOOBIG_DIR; 2309 if (p->is_reg && p->num_blocks+1 >= p->max_blocks) 2310 problem = PR_1_TOOBIG_REG; 2311 if (!p->is_dir && !p->is_reg && blockcnt > 0) 2312 problem = PR_1_TOOBIG_SYMLINK; 2313 2314 if (blk < fs->super->s_first_data_block || 2315 blk >= ext2fs_blocks_count(fs->super)) 2316 problem = PR_1_ILLEGAL_BLOCK_NUM; 2317 2318 if (problem) { 2319 p->num_illegal_blocks++; 2320 if (!p->suppress && (p->num_illegal_blocks % 12) == 0) { 2321 if (fix_problem(ctx, PR_1_TOO_MANY_BAD_BLOCKS, pctx)) { 2322 p->clear = 1; 2323 return BLOCK_ABORT; 2324 } 2325 if (fix_problem(ctx, PR_1_SUPPRESS_MESSAGES, pctx)) { 2326 p->suppress = 1; 2327 set_latch_flags(PR_LATCH_BLOCK, 2328 PRL_SUPPRESS, 0); 2329 } 2330 } 2331 pctx->blk = blk; 2332 pctx->blkcount = blockcnt; 2333 if (fix_problem(ctx, problem, pctx)) { 2334 blk = *block_nr = 0; 2335 ret_code = BLOCK_CHANGED; 2336 goto mark_dir; 2337 } else 2338 return 0; 2339 } 2340 2341 if (p->ino == EXT2_RESIZE_INO) { 2342 /* 2343 * The resize inode has already be sanity checked 2344 * during pass #0 (the superblock checks). All we 2345 * have to do is mark the double indirect block as 2346 * being in use; all of the other blocks are handled 2347 * by mark_table_blocks()). 2348 */ 2349 if (blockcnt == BLOCK_COUNT_DIND) 2350 mark_block_used(ctx, blk); 2351 p->num_blocks++; 2352 } else if (!(ctx->fs->cluster_ratio_bits && 2353 p->previous_block && 2354 (EXT2FS_B2C(ctx->fs, blk) == 2355 EXT2FS_B2C(ctx->fs, p->previous_block)) && 2356 (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) == 2357 ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) { 2358 mark_block_used(ctx, blk); 2359 p->num_blocks++; 2360 } 2361 if (blockcnt >= 0) 2362 p->last_block = blockcnt; 2363 p->previous_block = blk; 2364mark_dir: 2365 if (p->is_dir && (blockcnt >= 0)) { 2366 while (++p->last_db_block < blockcnt) { 2367 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, 2368 p->ino, 0, 2369 p->last_db_block); 2370 if (pctx->errcode) { 2371 pctx->blk = 0; 2372 pctx->num = p->last_db_block; 2373 goto failed_add_dir_block; 2374 } 2375 } 2376 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino, 2377 blk, blockcnt); 2378 if (pctx->errcode) { 2379 pctx->blk = blk; 2380 pctx->num = blockcnt; 2381 failed_add_dir_block: 2382 fix_problem(ctx, PR_1_ADD_DBLOCK, pctx); 2383 /* Should never get here */ 2384 ctx->flags |= E2F_FLAG_ABORT; 2385 return BLOCK_ABORT; 2386 } 2387 } 2388 return ret_code; 2389} 2390 2391static int process_bad_block(ext2_filsys fs, 2392 blk64_t *block_nr, 2393 e2_blkcnt_t blockcnt, 2394 blk64_t ref_block EXT2FS_ATTR((unused)), 2395 int ref_offset EXT2FS_ATTR((unused)), 2396 void *priv_data) 2397{ 2398 struct process_block_struct *p; 2399 blk64_t blk = *block_nr; 2400 blk64_t first_block; 2401 dgrp_t i; 2402 struct problem_context *pctx; 2403 e2fsck_t ctx; 2404 2405 /* 2406 * Note: This function processes blocks for the bad blocks 2407 * inode, which is never compressed. So we don't use HOLE_BLKADDR(). 2408 */ 2409 2410 if (!blk) 2411 return 0; 2412 2413 p = (struct process_block_struct *) priv_data; 2414 ctx = p->ctx; 2415 pctx = p->pctx; 2416 2417 pctx->ino = EXT2_BAD_INO; 2418 pctx->blk = blk; 2419 pctx->blkcount = blockcnt; 2420 2421 if ((blk < fs->super->s_first_data_block) || 2422 (blk >= ext2fs_blocks_count(fs->super))) { 2423 if (fix_problem(ctx, PR_1_BB_ILLEGAL_BLOCK_NUM, pctx)) { 2424 *block_nr = 0; 2425 return BLOCK_CHANGED; 2426 } else 2427 return 0; 2428 } 2429 2430 if (blockcnt < 0) { 2431 if (ext2fs_test_block_bitmap2(p->fs_meta_blocks, blk)) { 2432 p->bbcheck = 1; 2433 if (fix_problem(ctx, PR_1_BB_FS_BLOCK, pctx)) { 2434 *block_nr = 0; 2435 return BLOCK_CHANGED; 2436 } 2437 } else if (ext2fs_test_block_bitmap2(ctx->block_found_map, 2438 blk)) { 2439 p->bbcheck = 1; 2440 if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, 2441 pctx)) { 2442 *block_nr = 0; 2443 return BLOCK_CHANGED; 2444 } 2445 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 2446 return BLOCK_ABORT; 2447 } else 2448 mark_block_used(ctx, blk); 2449 return 0; 2450 } 2451#if 0 2452 printf ("DEBUG: Marking %u as bad.\n", blk); 2453#endif 2454 ctx->fs_badblocks_count++; 2455 /* 2456 * If the block is not used, then mark it as used and return. 2457 * If it is already marked as found, this must mean that 2458 * there's an overlap between the filesystem table blocks 2459 * (bitmaps and inode table) and the bad block list. 2460 */ 2461 if (!ext2fs_test_block_bitmap2(ctx->block_found_map, blk)) { 2462 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk); 2463 return 0; 2464 } 2465 /* 2466 * Try to find the where the filesystem block was used... 2467 */ 2468 first_block = fs->super->s_first_data_block; 2469 2470 for (i = 0; i < fs->group_desc_count; i++ ) { 2471 pctx->group = i; 2472 pctx->blk = blk; 2473 if (!ext2fs_bg_has_super(fs, i)) 2474 goto skip_super; 2475 if (blk == first_block) { 2476 if (i == 0) { 2477 if (fix_problem(ctx, 2478 PR_1_BAD_PRIMARY_SUPERBLOCK, 2479 pctx)) { 2480 *block_nr = 0; 2481 return BLOCK_CHANGED; 2482 } 2483 return 0; 2484 } 2485 fix_problem(ctx, PR_1_BAD_SUPERBLOCK, pctx); 2486 return 0; 2487 } 2488 if ((blk > first_block) && 2489 (blk <= first_block + fs->desc_blocks)) { 2490 if (i == 0) { 2491 pctx->blk = *block_nr; 2492 if (fix_problem(ctx, 2493 PR_1_BAD_PRIMARY_GROUP_DESCRIPTOR, pctx)) { 2494 *block_nr = 0; 2495 return BLOCK_CHANGED; 2496 } 2497 return 0; 2498 } 2499 fix_problem(ctx, PR_1_BAD_GROUP_DESCRIPTORS, pctx); 2500 return 0; 2501 } 2502 skip_super: 2503 if (blk == ext2fs_block_bitmap_loc(fs, i)) { 2504 if (fix_problem(ctx, PR_1_BB_BAD_BLOCK, pctx)) { 2505 ctx->invalid_block_bitmap_flag[i]++; 2506 ctx->invalid_bitmaps++; 2507 } 2508 return 0; 2509 } 2510 if (blk == ext2fs_inode_bitmap_loc(fs, i)) { 2511 if (fix_problem(ctx, PR_1_IB_BAD_BLOCK, pctx)) { 2512 ctx->invalid_inode_bitmap_flag[i]++; 2513 ctx->invalid_bitmaps++; 2514 } 2515 return 0; 2516 } 2517 if ((blk >= ext2fs_inode_table_loc(fs, i)) && 2518 (blk < (ext2fs_inode_table_loc(fs, i) + 2519 fs->inode_blocks_per_group))) { 2520 /* 2521 * If there are bad blocks in the inode table, 2522 * the inode scan code will try to do 2523 * something reasonable automatically. 2524 */ 2525 return 0; 2526 } 2527 first_block += fs->super->s_blocks_per_group; 2528 } 2529 /* 2530 * If we've gotten to this point, then the only 2531 * possibility is that the bad block inode meta data 2532 * is using a bad block. 2533 */ 2534 if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) || 2535 (blk == p->inode->i_block[EXT2_DIND_BLOCK]) || 2536 (blk == p->inode->i_block[EXT2_TIND_BLOCK])) { 2537 p->bbcheck = 1; 2538 if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, pctx)) { 2539 *block_nr = 0; 2540 return BLOCK_CHANGED; 2541 } 2542 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 2543 return BLOCK_ABORT; 2544 return 0; 2545 } 2546 2547 pctx->group = -1; 2548 2549 /* Warn user that the block wasn't claimed */ 2550 fix_problem(ctx, PR_1_PROGERR_CLAIMED_BLOCK, pctx); 2551 2552 return 0; 2553} 2554 2555static void new_table_block(e2fsck_t ctx, blk_t first_block, int group, 2556 const char *name, int num, blk64_t *new_block) 2557{ 2558 ext2_filsys fs = ctx->fs; 2559 dgrp_t last_grp; 2560 blk64_t old_block = *new_block; 2561 blk64_t last_block; 2562 int i, is_flexbg, flexbg, flexbg_size; 2563 char *buf; 2564 struct problem_context pctx; 2565 2566 clear_problem_context(&pctx); 2567 2568 pctx.group = group; 2569 pctx.blk = old_block; 2570 pctx.str = name; 2571 2572 /* 2573 * For flex_bg filesystems, first try to allocate the metadata 2574 * within the flex_bg, and if that fails then try finding the 2575 * space anywhere in the filesystem. 2576 */ 2577 is_flexbg = EXT2_HAS_INCOMPAT_FEATURE(fs->super, 2578 EXT4_FEATURE_INCOMPAT_FLEX_BG); 2579 if (is_flexbg) { 2580 flexbg_size = 1 << fs->super->s_log_groups_per_flex; 2581 flexbg = group / flexbg_size; 2582 first_block = ext2fs_group_first_block2(fs, 2583 flexbg_size * flexbg); 2584 last_grp = group | (flexbg_size - 1); 2585 if (last_grp > fs->group_desc_count) 2586 last_grp = fs->group_desc_count; 2587 last_block = ext2fs_group_last_block2(fs, last_grp); 2588 } else 2589 last_block = ext2fs_group_last_block2(fs, group); 2590 pctx.errcode = ext2fs_get_free_blocks2(fs, first_block, last_block, 2591 num, ctx->block_found_map, 2592 new_block); 2593 if (is_flexbg && (pctx.errcode == EXT2_ET_BLOCK_ALLOC_FAIL)) 2594 pctx.errcode = ext2fs_get_free_blocks2(fs, 2595 fs->super->s_first_data_block, 2596 ext2fs_blocks_count(fs->super), 2597 num, ctx->block_found_map, new_block); 2598 if (pctx.errcode) { 2599 pctx.num = num; 2600 fix_problem(ctx, PR_1_RELOC_BLOCK_ALLOCATE, &pctx); 2601 ext2fs_unmark_valid(fs); 2602 ctx->flags |= E2F_FLAG_ABORT; 2603 return; 2604 } 2605 pctx.errcode = ext2fs_get_mem(fs->blocksize, &buf); 2606 if (pctx.errcode) { 2607 fix_problem(ctx, PR_1_RELOC_MEMORY_ALLOCATE, &pctx); 2608 ext2fs_unmark_valid(fs); 2609 ctx->flags |= E2F_FLAG_ABORT; 2610 return; 2611 } 2612 ext2fs_mark_super_dirty(fs); 2613 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; 2614 pctx.blk2 = *new_block; 2615 fix_problem(ctx, (old_block ? PR_1_RELOC_FROM_TO : 2616 PR_1_RELOC_TO), &pctx); 2617 pctx.blk2 = 0; 2618 for (i = 0; i < num; i++) { 2619 pctx.blk = i; 2620 ext2fs_mark_block_bitmap2(ctx->block_found_map, (*new_block)+i); 2621 if (old_block) { 2622 pctx.errcode = io_channel_read_blk64(fs->io, 2623 old_block + i, 1, buf); 2624 if (pctx.errcode) 2625 fix_problem(ctx, PR_1_RELOC_READ_ERR, &pctx); 2626 } else 2627 memset(buf, 0, fs->blocksize); 2628 2629 pctx.blk = (*new_block) + i; 2630 pctx.errcode = io_channel_write_blk64(fs->io, pctx.blk, 2631 1, buf); 2632 if (pctx.errcode) 2633 fix_problem(ctx, PR_1_RELOC_WRITE_ERR, &pctx); 2634 } 2635 ext2fs_free_mem(&buf); 2636} 2637 2638/* 2639 * This routine gets called at the end of pass 1 if bad blocks are 2640 * detected in the superblock, group descriptors, inode_bitmaps, or 2641 * block bitmaps. At this point, all of the blocks have been mapped 2642 * out, so we can try to allocate new block(s) to replace the bad 2643 * blocks. 2644 */ 2645static void handle_fs_bad_blocks(e2fsck_t ctx) 2646{ 2647 ext2_filsys fs = ctx->fs; 2648 dgrp_t i; 2649 blk64_t first_block; 2650 blk64_t new_blk; 2651 2652 for (i = 0; i < fs->group_desc_count; i++) { 2653 first_block = ext2fs_group_first_block2(fs, i); 2654 2655 if (ctx->invalid_block_bitmap_flag[i]) { 2656 new_blk = ext2fs_block_bitmap_loc(fs, i); 2657 new_table_block(ctx, first_block, i, _("block bitmap"), 2658 1, &new_blk); 2659 ext2fs_block_bitmap_loc_set(fs, i, new_blk); 2660 } 2661 if (ctx->invalid_inode_bitmap_flag[i]) { 2662 new_blk = ext2fs_inode_bitmap_loc(fs, i); 2663 new_table_block(ctx, first_block, i, _("inode bitmap"), 2664 1, &new_blk); 2665 ext2fs_inode_bitmap_loc_set(fs, i, new_blk); 2666 } 2667 if (ctx->invalid_inode_table_flag[i]) { 2668 new_blk = ext2fs_inode_table_loc(fs, i); 2669 new_table_block(ctx, first_block, i, _("inode table"), 2670 fs->inode_blocks_per_group, 2671 &new_blk); 2672 ext2fs_inode_table_loc_set(fs, i, new_blk); 2673 ctx->flags |= E2F_FLAG_RESTART; 2674 } 2675 } 2676 ctx->invalid_bitmaps = 0; 2677} 2678 2679/* 2680 * This routine marks all blocks which are used by the superblock, 2681 * group descriptors, inode bitmaps, and block bitmaps. 2682 */ 2683static void mark_table_blocks(e2fsck_t ctx) 2684{ 2685 ext2_filsys fs = ctx->fs; 2686 blk64_t b; 2687 dgrp_t i; 2688 unsigned int j; 2689 struct problem_context pctx; 2690 2691 clear_problem_context(&pctx); 2692 2693 for (i = 0; i < fs->group_desc_count; i++) { 2694 pctx.group = i; 2695 2696 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_found_map); 2697 2698 /* 2699 * Mark the blocks used for the inode table 2700 */ 2701 if (ext2fs_inode_table_loc(fs, i)) { 2702 for (j = 0, b = ext2fs_inode_table_loc(fs, i); 2703 j < fs->inode_blocks_per_group; 2704 j++, b++) { 2705 if (ext2fs_test_block_bitmap2(ctx->block_found_map, 2706 b)) { 2707 pctx.blk = b; 2708 if (!ctx->invalid_inode_table_flag[i] && 2709 fix_problem(ctx, 2710 PR_1_ITABLE_CONFLICT, &pctx)) { 2711 ctx->invalid_inode_table_flag[i]++; 2712 ctx->invalid_bitmaps++; 2713 } 2714 } else { 2715 ext2fs_mark_block_bitmap2(ctx->block_found_map, 2716 b); 2717 } 2718 } 2719 } 2720 2721 /* 2722 * Mark block used for the block bitmap 2723 */ 2724 if (ext2fs_block_bitmap_loc(fs, i)) { 2725 if (ext2fs_test_block_bitmap2(ctx->block_found_map, 2726 ext2fs_block_bitmap_loc(fs, i))) { 2727 pctx.blk = ext2fs_block_bitmap_loc(fs, i); 2728 if (fix_problem(ctx, PR_1_BB_CONFLICT, &pctx)) { 2729 ctx->invalid_block_bitmap_flag[i]++; 2730 ctx->invalid_bitmaps++; 2731 } 2732 } else { 2733 ext2fs_mark_block_bitmap2(ctx->block_found_map, 2734 ext2fs_block_bitmap_loc(fs, i)); 2735 } 2736 2737 } 2738 /* 2739 * Mark block used for the inode bitmap 2740 */ 2741 if (ext2fs_inode_bitmap_loc(fs, i)) { 2742 if (ext2fs_test_block_bitmap2(ctx->block_found_map, 2743 ext2fs_inode_bitmap_loc(fs, i))) { 2744 pctx.blk = ext2fs_inode_bitmap_loc(fs, i); 2745 if (fix_problem(ctx, PR_1_IB_CONFLICT, &pctx)) { 2746 ctx->invalid_inode_bitmap_flag[i]++; 2747 ctx->invalid_bitmaps++; 2748 } 2749 } else { 2750 ext2fs_mark_block_bitmap2(ctx->block_found_map, 2751 ext2fs_inode_bitmap_loc(fs, i)); 2752 } 2753 } 2754 } 2755} 2756 2757/* 2758 * Thes subroutines short circuits ext2fs_get_blocks and 2759 * ext2fs_check_directory; we use them since we already have the inode 2760 * structure, so there's no point in letting the ext2fs library read 2761 * the inode again. 2762 */ 2763static errcode_t pass1_get_blocks(ext2_filsys fs, ext2_ino_t ino, 2764 blk_t *blocks) 2765{ 2766 e2fsck_t ctx = (e2fsck_t) fs->priv_data; 2767 int i; 2768 2769 if ((ino != ctx->stashed_ino) || !ctx->stashed_inode) 2770 return EXT2_ET_CALLBACK_NOTHANDLED; 2771 2772 for (i=0; i < EXT2_N_BLOCKS; i++) 2773 blocks[i] = ctx->stashed_inode->i_block[i]; 2774 return 0; 2775} 2776 2777static errcode_t pass1_read_inode(ext2_filsys fs, ext2_ino_t ino, 2778 struct ext2_inode *inode) 2779{ 2780 e2fsck_t ctx = (e2fsck_t) fs->priv_data; 2781 2782 if ((ino != ctx->stashed_ino) || !ctx->stashed_inode) 2783 return EXT2_ET_CALLBACK_NOTHANDLED; 2784 *inode = *ctx->stashed_inode; 2785 return 0; 2786} 2787 2788static errcode_t pass1_write_inode(ext2_filsys fs, ext2_ino_t ino, 2789 struct ext2_inode *inode) 2790{ 2791 e2fsck_t ctx = (e2fsck_t) fs->priv_data; 2792 2793 if ((ino == ctx->stashed_ino) && ctx->stashed_inode && 2794 (inode != ctx->stashed_inode)) 2795 *ctx->stashed_inode = *inode; 2796 return EXT2_ET_CALLBACK_NOTHANDLED; 2797} 2798 2799static errcode_t pass1_check_directory(ext2_filsys fs, ext2_ino_t ino) 2800{ 2801 e2fsck_t ctx = (e2fsck_t) fs->priv_data; 2802 2803 if ((ino != ctx->stashed_ino) || !ctx->stashed_inode) 2804 return EXT2_ET_CALLBACK_NOTHANDLED; 2805 2806 if (!LINUX_S_ISDIR(ctx->stashed_inode->i_mode)) 2807 return EXT2_ET_NO_DIRECTORY; 2808 return 0; 2809} 2810 2811static errcode_t e2fsck_get_alloc_block(ext2_filsys fs, blk64_t goal, 2812 blk64_t *ret) 2813{ 2814 e2fsck_t ctx = (e2fsck_t) fs->priv_data; 2815 errcode_t retval; 2816 blk64_t new_block; 2817 2818 if (ctx->block_found_map) { 2819 retval = ext2fs_new_block2(fs, goal, ctx->block_found_map, 2820 &new_block); 2821 if (retval) 2822 return retval; 2823 if (fs->block_map) { 2824 ext2fs_mark_block_bitmap2(fs->block_map, new_block); 2825 ext2fs_mark_bb_dirty(fs); 2826 } 2827 } else { 2828 if (!fs->block_map) { 2829 retval = ext2fs_read_block_bitmap(fs); 2830 if (retval) 2831 return retval; 2832 } 2833 2834 retval = ext2fs_new_block2(fs, goal, 0, &new_block); 2835 if (retval) 2836 return retval; 2837 } 2838 2839 *ret = new_block; 2840 return (0); 2841} 2842 2843static void e2fsck_block_alloc_stats(ext2_filsys fs, blk64_t blk, int inuse) 2844{ 2845 e2fsck_t ctx = (e2fsck_t) fs->priv_data; 2846 2847 if (ctx->block_found_map) { 2848 if (inuse > 0) 2849 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk); 2850 else 2851 ext2fs_unmark_block_bitmap2(ctx->block_found_map, blk); 2852 } 2853} 2854 2855void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts) 2856{ 2857 ext2_filsys fs = ctx->fs; 2858 2859 if (use_shortcuts) { 2860 fs->get_blocks = pass1_get_blocks; 2861 fs->check_directory = pass1_check_directory; 2862 fs->read_inode = pass1_read_inode; 2863 fs->write_inode = pass1_write_inode; 2864 ctx->stashed_ino = 0; 2865 ext2fs_set_alloc_block_callback(fs, e2fsck_get_alloc_block, 2866 0); 2867 ext2fs_set_block_alloc_stats_callback(fs, 2868 e2fsck_block_alloc_stats, 2869 0); 2870 } else { 2871 fs->get_blocks = 0; 2872 fs->check_directory = 0; 2873 fs->read_inode = 0; 2874 fs->write_inode = 0; 2875 } 2876} 2877