e2fsck/pass2.c

   1 /*
   2  * pass2.c --- check directory structure
   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 2 of e2fsck iterates through all active directory inodes, and
  12  * applies to following tests to each directory entry in the directory
  13  * blocks in the inodes:
  14  *
  15  *      - The length of the directory entry (rec_len) should be at
  16  *              least 8 bytes, and no more than the remaining space
  17  *              left in the directory block.
  18  *      - The length of the name in the directory entry (name_len)
  19  *              should be less than (rec_len - 8).
  20  *      - The inode number in the directory entry should be within
  21  *              legal bounds.
  22  *      - The inode number should refer to a in-use inode.
  23  *      - The first entry should be '.', and its inode should be
  24  *              the inode of the directory.
  25  *      - The second entry should be '..'.
  26  *
  27  * To minimize disk seek time, the directory blocks are processed in
  28  * sorted order of block numbers.
  29  *
  30  * Pass 2 also collects the following information:
  31  *      - The inode numbers of the subdirectories for each directory.
  32  *
  33  * Pass 2 relies on the following information from previous passes:
  34  *      - The directory information collected in pass 1.
  35  *      - The inode_used_map bitmap
  36  *      - The inode_bad_map bitmap
  37  *      - The inode_dir_map bitmap
  38  *      - The encrypted_file_info
  39  *      - The inode_casefold_map bitmap
  40  *
  41  * Pass 2 frees the following data structures
  42  *      - The inode_bad_map bitmap
  43  *      - The inode_reg_map bitmap
  44  *      - The encrypted_file_info
  45  *      - The inode_casefold_map bitmap
  46  */
  47
  48 #define _GNU_SOURCE 1 /* get strnlen() */
  49 #include "config.h"
  50 #include <string.h>
  51
  52 #include "e2fsck.h"
  53 #include "problem.h"
  54 #include "support/dict.h"
  55
  56 #ifdef NO_INLINE_FUNCS
  57 #define _INLINE_
  58 #else
  59 #define _INLINE_ inline
  60 #endif
  61
  62 /* #define DX_DEBUG */
  63
  64 /*
  65  * Keeps track of how many times an inode is referenced.
  66  */
  67 static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf);
  68 static int check_dir_block2(ext2_filsys fs,
  69                            struct ext2_db_entry2 *dir_blocks_info,
  70                            void *priv_data);
  71 static int check_dir_block(ext2_filsys fs,
  72                            struct ext2_db_entry2 *dir_blocks_info,
  73                            void *priv_data);
  74 static int allocate_dir_block(e2fsck_t ctx,
  75                               struct ext2_db_entry2 *dir_blocks_info,
  76                               char *buf, struct problem_context *pctx);
  77 static void clear_htree(e2fsck_t ctx, ext2_ino_t ino);
  78 static short htree_depth(struct dx_dir_info *dx_dir,
  79                          struct dx_dirblock_info *dx_db);
  80 static EXT2_QSORT_TYPE special_dir_block_cmp(const void *a, const void *b);
  81
  82 struct check_dir_struct {
  83         char *buf;
  84         struct problem_context  pctx;
  85         int     count, max;
  86         e2fsck_t ctx;
  87         unsigned long long list_offset;
  88         unsigned long long ra_entries;
  89         unsigned long long next_ra_off;
  90 };
  91
  92 static void update_parents(struct dx_dir_info *dx_dir, int type)
  93 {
  94         struct dx_dirblock_info *dx_db, *dx_parent, *dx_previous;
  95         blk_t b;
  96
  97         for (b = 0, dx_db = dx_dir->dx_block;
  98              b < dx_dir->numblocks;
  99              b++, dx_db++) {
 100                 dx_parent = &dx_dir->dx_block[dx_db->parent];
 101                 if (dx_db->type != type)
 102                         continue;
 103
 104                 /*
 105                  * XXX Make sure dx_parent->min_hash > dx_db->min_hash
 106                 */
 107                 if (dx_db->flags & DX_FLAG_FIRST) {
 108                         dx_parent->min_hash = dx_db->min_hash;
 109                         if (dx_parent->previous) {
 110                                 dx_previous =
 111                                         &dx_dir->dx_block[dx_parent->previous];
 112                                 dx_previous->node_max_hash =
 113                                         dx_parent->min_hash;
 114                         }
 115                 }
 116                 /*
 117                  * XXX Make sure dx_parent->max_hash < dx_db->max_hash
 118                  */
 119                 if (dx_db->flags & DX_FLAG_LAST) {
 120                         dx_parent->max_hash = dx_db->max_hash;
 121                 }
 122         }
 123 }
 124
 125 void e2fsck_pass2(e2fsck_t ctx)
 126 {
 127         struct ext2_super_block *sb = ctx->fs->super;
 128         struct problem_context  pctx;
 129         ext2_filsys             fs = ctx->fs;
 130         char                    *buf = NULL;
 131 #ifdef RESOURCE_TRACK
 132         struct resource_track   rtrack;
 133 #endif
 134         struct check_dir_struct cd;
 135         struct dx_dir_info      *dx_dir;
 136         struct dx_dirblock_info *dx_db;
 137         blk_t                   b;
 138         ext2_ino_t              i;
 139         short                   depth;
 140         problem_t               code;
 141         int                     bad_dir;
 142         int (*check_dir_func)(ext2_filsys fs,
 143                               struct ext2_db_entry2 *dir_blocks_info,
 144                               void *priv_data);
 145
 146         init_resource_track(&rtrack, ctx->fs->io);
 147         clear_problem_context(&cd.pctx);
 148
 149 #ifdef MTRACE
 150         mtrace_print("Pass 2");
 151 #endif
 152
 153         if (!(ctx->options & E2F_OPT_PREEN))
 154                 fix_problem(ctx, PR_2_PASS_HEADER, &cd.pctx);
 155
 156         cd.pctx.errcode = e2fsck_setup_icount(ctx, "inode_count",
 157                                 EXT2_ICOUNT_OPT_INCREMENT,
 158                                 ctx->inode_link_info, &ctx->inode_count);
 159         if (cd.pctx.errcode) {
 160                 fix_problem(ctx, PR_2_ALLOCATE_ICOUNT, &cd.pctx);
 161                 ctx->flags |= E2F_FLAG_ABORT;
 162                 goto cleanup;
 163         }
 164         buf = (char *) e2fsck_allocate_memory(ctx, 2*fs->blocksize,
 165                                               "directory scan buffer");
 166
 167         /*
 168          * Set up the parent pointer for the root directory, if
 169          * present.  (If the root directory is not present, we will
 170          * create it in pass 3.)
 171          */
 172         (void) e2fsck_dir_info_set_parent(ctx, EXT2_ROOT_INO, EXT2_ROOT_INO);
 173
 174         cd.buf = buf;
 175         cd.ctx = ctx;
 176         cd.count = 1;
 177         cd.max = ext2fs_dblist_count2(fs->dblist);
 178         cd.list_offset = 0;
 179         cd.ra_entries = ctx->readahead_kb * 1024 / ctx->fs->blocksize;
 180         cd.next_ra_off = 0;
 181
 182         if (ctx->progress)
 183                 (void) (ctx->progress)(ctx, 2, 0, cd.max);
 184
 185         if (ext2fs_has_feature_dir_index(fs->super))
 186                 ext2fs_dblist_sort2(fs->dblist, special_dir_block_cmp);
 187
 188         check_dir_func = cd.ra_entries ? check_dir_block2 : check_dir_block;
 189         cd.pctx.errcode = ext2fs_dblist_iterate2(fs->dblist, check_dir_func,
 190                                                  &cd);
 191         if (ctx->flags & E2F_FLAG_RESTART_LATER) {
 192                 ctx->flags |= E2F_FLAG_RESTART;
 193                 ctx->flags &= ~E2F_FLAG_RESTART_LATER;
 194         }
 195
 196         if (ctx->flags & E2F_FLAG_RUN_RETURN)
 197                 goto cleanup;
 198
 199         if (cd.pctx.errcode) {
 200                 fix_problem(ctx, PR_2_DBLIST_ITERATE, &cd.pctx);
 201                 ctx->flags |= E2F_FLAG_ABORT;
 202                 goto cleanup;
 203         }
 204
 205         for (i=0; (dx_dir = e2fsck_dx_dir_info_iter(ctx, &i)) != 0;) {
 206                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
 207                         goto cleanup;
 208                 if (e2fsck_dir_will_be_rehashed(ctx, dx_dir->ino) ||
 209                     dx_dir->numblocks == 0)
 210                         continue;
 211                 clear_problem_context(&pctx);
 212                 bad_dir = 0;
 213                 pctx.dir = dx_dir->ino;
 214                 dx_db = dx_dir->dx_block;
 215                 if (dx_db->flags & DX_FLAG_REFERENCED)
 216                         dx_db->flags |= DX_FLAG_DUP_REF;
 217                 else
 218                         dx_db->flags |= DX_FLAG_REFERENCED;
 219                 /*
 220                  * Find all of the first and last leaf blocks, and
 221                  * update their parent's min and max hash values
 222                  */
 223                 update_parents(dx_dir, DX_DIRBLOCK_LEAF);
 224
 225                 /* for 3 level htree: update 2 level parent's min
 226                  * and max hash values */
 227                 update_parents(dx_dir, DX_DIRBLOCK_NODE);
 228
 229                 for (b=0, dx_db = dx_dir->dx_block;
 230                      b < dx_dir->numblocks;
 231                      b++, dx_db++) {
 232                         pctx.blkcount = b;
 233                         pctx.group = dx_db->parent;
 234                         code = 0;
 235                         if (!(dx_db->flags & DX_FLAG_FIRST) &&
 236                             (dx_db->min_hash < dx_db->node_min_hash)) {
 237                                 pctx.blk = dx_db->min_hash;
 238                                 pctx.blk2 = dx_db->node_min_hash;
 239                                 code = PR_2_HTREE_MIN_HASH;
 240                                 fix_problem(ctx, code, &pctx);
 241                                 bad_dir++;
 242                         }
 243                         if (dx_db->type == DX_DIRBLOCK_LEAF) {
 244                                 depth = htree_depth(dx_dir, dx_db);
 245                                 if (depth != dx_dir->depth) {
 246                                         pctx.num = dx_dir->depth;
 247                                         code = PR_2_HTREE_BAD_DEPTH;
 248                                         fix_problem(ctx, code, &pctx);
 249                                         bad_dir++;
 250                                 }
 251                         }
 252                         /*
 253                          * This test doesn't apply for the root block
 254                          * at block #0
 255                          */
 256                         if (b &&
 257                             (dx_db->max_hash > dx_db->node_max_hash)) {
 258                                 pctx.blk = dx_db->max_hash;
 259                                 pctx.blk2 = dx_db->node_max_hash;
 260                                 code = PR_2_HTREE_MAX_HASH;
 261                                 fix_problem(ctx, code, &pctx);
 262                                 bad_dir++;
 263                         }
 264                         if (!(dx_db->flags & DX_FLAG_REFERENCED)) {
 265                                 code = PR_2_HTREE_NOTREF;
 266                                 fix_problem(ctx, code, &pctx);
 267                                 bad_dir++;
 268                         } else if (dx_db->flags & DX_FLAG_DUP_REF) {
 269                                 code = PR_2_HTREE_DUPREF;
 270                                 fix_problem(ctx, code, &pctx);
 271                                 bad_dir++;
 272                         }
 273                 }
 274                 if (bad_dir && fix_problem(ctx, PR_2_HTREE_CLEAR, &pctx)) {
 275                         clear_htree(ctx, dx_dir->ino);
 276                         dx_dir->numblocks = 0;
 277                 }
 278         }
 279         e2fsck_free_dx_dir_info(ctx);
 280
 281         ext2fs_free_mem(&buf);
 282         ext2fs_free_dblist(fs->dblist);
 283
 284         if (ctx->inode_bad_map) {
 285                 ext2fs_free_inode_bitmap(ctx->inode_bad_map);
 286                 ctx->inode_bad_map = 0;
 287         }
 288         if (ctx->inode_reg_map) {
 289                 ext2fs_free_inode_bitmap(ctx->inode_reg_map);
 290                 ctx->inode_reg_map = 0;
 291         }
 292         if (ctx->inode_casefold_map) {
 293                 ext2fs_free_inode_bitmap(ctx->inode_casefold_map);
 294                 ctx->inode_casefold_map = 0;
 295         }
 296         destroy_encrypted_file_info(ctx);
 297         if (ctx->casefolded_dirs) {
 298                 ext2fs_u32_list_free(ctx->casefolded_dirs);
 299                 ctx->casefolded_dirs = 0;
 300         }
 301
 302         clear_problem_context(&pctx);
 303         if (ctx->large_files) {
 304                 if (!ext2fs_has_feature_large_file(sb) &&
 305                     fix_problem(ctx, PR_2_FEATURE_LARGE_FILES, &pctx)) {
 306                         ext2fs_set_feature_large_file(sb);
 307                         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
 308                         ext2fs_mark_super_dirty(fs);
 309                 }
 310                 if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
 311                     fix_problem(ctx, PR_1_FS_REV_LEVEL, &pctx)) {
 312                         ext2fs_update_dynamic_rev(fs);
 313                         ext2fs_mark_super_dirty(fs);
 314                 }
 315         }
 316
 317         print_resource_track(ctx, _("Pass 2"), &rtrack, fs->io);
 318 cleanup:
 319         ext2fs_free_mem(&buf);
 320 }
 321
 322 #define MAX_DEPTH 32000
 323 static short htree_depth(struct dx_dir_info *dx_dir,
 324                          struct dx_dirblock_info *dx_db)
 325 {
 326         short depth = 0;
 327
 328         while (dx_db->type != DX_DIRBLOCK_ROOT && depth < MAX_DEPTH) {
 329                 dx_db = &dx_dir->dx_block[dx_db->parent];
 330                 depth++;
 331         }
 332         return depth;
 333 }
 334
 335 static int dict_de_cmp(const void *cmp_ctx, const void *a, const void *b)
 336 {
 337         const struct ext2_dir_entry *de_a, *de_b;
 338         int     a_len, b_len;
 339
 340         de_a = (const struct ext2_dir_entry *) a;
 341         a_len = ext2fs_dirent_name_len(de_a);
 342         de_b = (const struct ext2_dir_entry *) b;
 343         b_len = ext2fs_dirent_name_len(de_b);
 344
 345         if (a_len != b_len)
 346                 return (a_len - b_len);
 347
 348         return memcmp(de_a->name, de_b->name, a_len);
 349 }
 350
 351 static int dict_de_cf_cmp(const void *cmp_ctx, const void *a, const void *b)
 352 {
 353         const struct ext2fs_nls_table *tbl = cmp_ctx;
 354         const struct ext2_dir_entry *de_a, *de_b;
 355         int     a_len, b_len;
 356
 357         de_a = (const struct ext2_dir_entry *) a;
 358         a_len = ext2fs_dirent_name_len(de_a);
 359         de_b = (const struct ext2_dir_entry *) b;
 360         b_len = ext2fs_dirent_name_len(de_b);
 361
 362         return ext2fs_casefold_cmp(tbl, de_a->name, a_len, de_b->name, b_len);
 363 }
 364
 365 /*
 366  * This is special sort function that makes sure that directory blocks
 367  * with a dirblock of zero are sorted to the beginning of the list.
 368  * This guarantees that the root node of the htree directories are
 369  * processed first, so we know what hash version to use.
 370  */
 371 static EXT2_QSORT_TYPE special_dir_block_cmp(const void *a, const void *b)
 372 {
 373         const struct ext2_db_entry2 *db_a =
 374                 (const struct ext2_db_entry2 *) a;
 375         const struct ext2_db_entry2 *db_b =
 376                 (const struct ext2_db_entry2 *) b;
 377
 378         if (db_a->blockcnt && !db_b->blockcnt)
 379                 return 1;
 380
 381         if (!db_a->blockcnt && db_b->blockcnt)
 382                 return -1;
 383
 384         if (db_a->blk != db_b->blk)
 385                 return (int) (db_a->blk - db_b->blk);
 386
 387         if (db_a->ino != db_b->ino)
 388                 return (int) (db_a->ino - db_b->ino);
 389
 390         return (int) (db_a->blockcnt - db_b->blockcnt);
 391 }
 392
 393
 394 /*
 395  * Make sure the first entry in the directory is '.', and that the
 396  * directory entry is sane.
 397  */
 398 static int check_dot(e2fsck_t ctx,
 399                      struct ext2_dir_entry *dirent,
 400                      ext2_ino_t ino, struct problem_context *pctx)
 401 {
 402         struct ext2_dir_entry *nextdir;
 403         unsigned int    rec_len, new_len;
 404         int             status = 0;
 405         int             created = 0;
 406         problem_t       problem = 0;
 407
 408         if (!dirent->inode)
 409                 problem = PR_2_MISSING_DOT;
 410         else if ((ext2fs_dirent_name_len(dirent) != 1) ||
 411                  (dirent->name[0] != '.'))
 412                 problem = PR_2_1ST_NOT_DOT;
 413         else if (dirent->name[1] != '\0')
 414                 problem = PR_2_DOT_NULL_TERM;
 415
 416         (void) ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 417         if (problem) {
 418                 if (fix_problem(ctx, problem, pctx)) {
 419                         if (rec_len < 12)
 420                                 rec_len = dirent->rec_len = 12;
 421                         dirent->inode = ino;
 422                         ext2fs_dirent_set_name_len(dirent, 1);
 423                         ext2fs_dirent_set_file_type(dirent, EXT2_FT_UNKNOWN);
 424                         dirent->name[0] = '.';
 425                         dirent->name[1] = '\0';
 426                         status = 1;
 427                         created = 1;
 428                 }
 429         }
 430         if (dirent->inode != ino) {
 431                 if (fix_problem(ctx, PR_2_BAD_INODE_DOT, pctx)) {
 432                         dirent->inode = ino;
 433                         status = 1;
 434                 }
 435         }
 436         if (rec_len > 12) {
 437                 new_len = rec_len - 12;
 438                 if (new_len > 12) {
 439                         if (created ||
 440                             fix_problem(ctx, PR_2_SPLIT_DOT, pctx)) {
 441                                 nextdir = (struct ext2_dir_entry *)
 442                                         ((char *) dirent + 12);
 443                                 dirent->rec_len = 12;
 444                                 (void) ext2fs_set_rec_len(ctx->fs, new_len,
 445                                                           nextdir);
 446                                 nextdir->inode = 0;
 447                                 ext2fs_dirent_set_name_len(nextdir, 0);
 448                                 ext2fs_dirent_set_file_type(nextdir,
 449                                                             EXT2_FT_UNKNOWN);
 450                                 status = 1;
 451                         }
 452                 }
 453         }
 454         return status;
 455 }
 456
 457 /*
 458  * Make sure the second entry in the directory is '..', and that the
 459  * directory entry is sane.  We do not check the inode number of '..'
 460  * here; this gets done in pass 3.
 461  */
 462 static int check_dotdot(e2fsck_t ctx,
 463                         struct ext2_dir_entry *dirent,
 464                         ext2_ino_t ino, struct problem_context *pctx)
 465 {
 466         problem_t       problem = 0;
 467         unsigned int    rec_len;
 468
 469         if (!dirent->inode)
 470                 problem = PR_2_MISSING_DOT_DOT;
 471         else if ((ext2fs_dirent_name_len(dirent) != 2) ||
 472                  (dirent->name[0] != '.') ||
 473                  (dirent->name[1] != '.'))
 474                 problem = PR_2_2ND_NOT_DOT_DOT;
 475         else if (dirent->name[2] != '\0')
 476                 problem = PR_2_DOT_DOT_NULL_TERM;
 477
 478         (void) ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 479         if (problem) {
 480                 if (fix_problem(ctx, problem, pctx)) {
 481                         if (rec_len < 12)
 482                                 dirent->rec_len = 12;
 483                         /*
 484                          * Note: we don't have the parent inode just
 485                          * yet, so we will fill it in with the root
 486                          * inode.  This will get fixed in pass 3.
 487                          */
 488                         dirent->inode = EXT2_ROOT_INO;
 489                         ext2fs_dirent_set_name_len(dirent, 2);
 490                         ext2fs_dirent_set_file_type(dirent, EXT2_FT_UNKNOWN);
 491                         dirent->name[0] = '.';
 492                         dirent->name[1] = '.';
 493                         dirent->name[2] = '\0';
 494                         return 1;
 495                 }
 496                 return 0;
 497         }
 498         if (e2fsck_dir_info_set_dotdot(ctx, ino, dirent->inode)) {
 499                 fix_problem(ctx, PR_2_NO_DIRINFO, pctx);
 500                 return -1;
 501         }
 502         return 0;
 503 }
 504
 505 /*
 506  * Check to make sure a directory entry doesn't contain any illegal
 507  * characters.
 508  */
 509 static int check_name(e2fsck_t ctx,
 510                       struct ext2_dir_entry *dirent,
 511                       struct problem_context *pctx)
 512 {
 513         int     i;
 514         int     fixup = -1;
 515         int     ret = 0;
 516
 517         for ( i = 0; i < ext2fs_dirent_name_len(dirent); i++) {
 518                 if (dirent->name[i] != '/' && dirent->name[i] != '\0')
 519                         continue;
 520                 if (fixup < 0)
 521                         fixup = fix_problem(ctx, PR_2_BAD_NAME, pctx);
 522                 if (fixup == 0)
 523                         return 0;
 524                 dirent->name[i] = '.';
 525                 ret = 1;
 526         }
 527         return ret;
 528 }
 529
 530 static int encrypted_check_name(e2fsck_t ctx,
 531                                 const struct ext2_dir_entry *dirent,
 532                                 struct problem_context *pctx)
 533 {
 534         if (ext2fs_dirent_name_len(dirent) < EXT4_CRYPTO_BLOCK_SIZE) {
 535                 if (fix_problem(ctx, PR_2_BAD_ENCRYPTED_NAME, pctx))
 536                         return 1;
 537                 ext2fs_unmark_valid(ctx->fs);
 538         }
 539         return 0;
 540 }
 541
 542 static int encoded_check_name(e2fsck_t ctx,
 543                               struct ext2_dir_entry *dirent,
 544                               struct problem_context *pctx)
 545 {
 546         const struct ext2fs_nls_table *tbl = ctx->fs->encoding;
 547         int ret;
 548         int len = ext2fs_dirent_name_len(dirent);
 549         char *pos, *end;
 550
 551         ret = ext2fs_check_encoded_name(tbl, dirent->name, len, &pos);
 552         if (ret < 0) {
 553                 fatal_error(ctx, _("NLS is broken."));
 554         } else if(ret > 0) {
 555                 ret = fix_problem(ctx, PR_2_BAD_ENCODED_NAME, pctx);
 556                 if (ret) {
 557                         end = &dirent->name[len];
 558                         for (; *pos && pos != end; pos++)
 559                                 *pos = '.';
 560                 }
 561         }
 562
 563         return (ret || check_name(ctx, dirent, pctx));
 564 }
 565
 566 /*
 567  * Check the directory filetype (if present)
 568  */
 569 static _INLINE_ int check_filetype(e2fsck_t ctx,
 570                                    struct ext2_dir_entry *dirent,
 571                                    ext2_ino_t dir_ino EXT2FS_ATTR((unused)),
 572                                    struct problem_context *pctx)
 573 {
 574         int     filetype = ext2fs_dirent_file_type(dirent);
 575         int     should_be = EXT2_FT_UNKNOWN;
 576         struct ext2_inode       inode;
 577
 578         if (!ext2fs_has_feature_filetype(ctx->fs->super)) {
 579                 if (filetype == 0 ||
 580                     !fix_problem(ctx, PR_2_CLEAR_FILETYPE, pctx))
 581                         return 0;
 582                 ext2fs_dirent_set_file_type(dirent, EXT2_FT_UNKNOWN);
 583                 return 1;
 584         }
 585
 586         if (ext2fs_test_inode_bitmap2(ctx->inode_dir_map, dirent->inode)) {
 587                 should_be = EXT2_FT_DIR;
 588         } else if (ext2fs_test_inode_bitmap2(ctx->inode_reg_map,
 589                                             dirent->inode)) {
 590                 should_be = EXT2_FT_REG_FILE;
 591         } else if (ctx->inode_bad_map &&
 592                    ext2fs_test_inode_bitmap2(ctx->inode_bad_map,
 593                                             dirent->inode))
 594                 should_be = 0;
 595         else {
 596                 e2fsck_read_inode(ctx, dirent->inode, &inode,
 597                                   "check_filetype");
 598                 should_be = ext2_file_type(inode.i_mode);
 599         }
 600         if (filetype == should_be)
 601                 return 0;
 602         pctx->num = should_be;
 603
 604         if (fix_problem(ctx, filetype ? PR_2_BAD_FILETYPE : PR_2_SET_FILETYPE,
 605                         pctx) == 0)
 606                 return 0;
 607
 608         ext2fs_dirent_set_file_type(dirent, should_be);
 609         return 1;
 610 }
 611
 612 static void parse_int_node(ext2_filsys fs,
 613                            struct ext2_db_entry2 *db,
 614                            struct check_dir_struct *cd,
 615                            struct dx_dir_info   *dx_dir,
 616                            char *block_buf, int failed_csum)
 617 {
 618         struct          ext2_dx_root_info  *root;
 619         struct          ext2_dx_entry *ent;
 620         struct          ext2_dx_countlimit *limit;
 621         struct dx_dirblock_info *dx_db;
 622         int             i, expect_limit, count;
 623         blk_t           blk;
 624         ext2_dirhash_t  min_hash = 0xffffffff;
 625         ext2_dirhash_t  max_hash = 0;
 626         ext2_dirhash_t  hash = 0, prev_hash;
 627         int             csum_size = 0;
 628
 629         if (db->blockcnt == 0) {
 630                 root = (struct ext2_dx_root_info *) (block_buf + 24);
 631
 632 #ifdef DX_DEBUG
 633                 printf("Root node dump:\n");
 634                 printf("\t Reserved zero: %u\n", root->reserved_zero);
 635                 printf("\t Hash Version: %u\n", root->hash_version);
 636                 printf("\t Info length: %u\n", root->info_length);
 637                 printf("\t Indirect levels: %u\n", root->indirect_levels);
 638                 printf("\t Flags: %x\n", root->unused_flags);
 639 #endif
 640
 641                 ent = (struct ext2_dx_entry *) (block_buf + 24 + root->info_length);
 642
 643                 if (failed_csum &&
 644                     (e2fsck_dir_will_be_rehashed(cd->ctx, cd->pctx.ino) ||
 645                      fix_problem(cd->ctx, PR_2_HTREE_ROOT_CSUM_INVALID,
 646                                 &cd->pctx)))
 647                         goto clear_and_exit;
 648         } else {
 649                 ent = (struct ext2_dx_entry *) (block_buf+8);
 650
 651                 if (failed_csum &&
 652                     (e2fsck_dir_will_be_rehashed(cd->ctx, cd->pctx.ino) ||
 653                      fix_problem(cd->ctx, PR_2_HTREE_NODE_CSUM_INVALID,
 654                                 &cd->pctx)))
 655                         goto clear_and_exit;
 656         }
 657
 658         limit = (struct ext2_dx_countlimit *) ent;
 659
 660 #ifdef DX_DEBUG
 661         printf("Number of entries (count): %d\n",
 662                ext2fs_le16_to_cpu(limit->count));
 663         printf("Number of entries (limit): %d\n",
 664                ext2fs_le16_to_cpu(limit->limit));
 665 #endif
 666
 667         count = ext2fs_le16_to_cpu(limit->count);
 668         if (ext2fs_has_feature_metadata_csum(fs->super))
 669                 csum_size = sizeof(struct ext2_dx_tail);
 670         expect_limit = (fs->blocksize -
 671                         (csum_size + ((char *) ent - block_buf))) /
 672                        sizeof(struct ext2_dx_entry);
 673         if (ext2fs_le16_to_cpu(limit->limit) != expect_limit) {
 674                 cd->pctx.num = ext2fs_le16_to_cpu(limit->limit);
 675                 if (fix_problem(cd->ctx, PR_2_HTREE_BAD_LIMIT, &cd->pctx))
 676                         goto clear_and_exit;
 677         }
 678         if (count > expect_limit) {
 679                 cd->pctx.num = count;
 680                 if (fix_problem(cd->ctx, PR_2_HTREE_BAD_COUNT, &cd->pctx))
 681                         goto clear_and_exit;
 682                 count = expect_limit;
 683         }
 684
 685         for (i=0; i < count; i++) {
 686                 prev_hash = hash;
 687                 hash = i ? (ext2fs_le32_to_cpu(ent[i].hash) & ~1) : 0;
 688 #ifdef DX_DEBUG
 689                 printf("Entry #%d: Hash 0x%08x, block %u\n", i,
 690                        hash, ext2fs_le32_to_cpu(ent[i].block));
 691 #endif
 692                 blk = ext2fs_le32_to_cpu(ent[i].block) & EXT4_DX_BLOCK_MASK;
 693                 /* Check to make sure the block is valid */
 694                 if (blk >= dx_dir->numblocks) {
 695                         cd->pctx.blk = blk;
 696                         if (fix_problem(cd->ctx, PR_2_HTREE_BADBLK,
 697                                         &cd->pctx))
 698                                 goto clear_and_exit;
 699                         continue;
 700                 }
 701                 if (hash < prev_hash &&
 702                     fix_problem(cd->ctx, PR_2_HTREE_HASH_ORDER, &cd->pctx))
 703                         goto clear_and_exit;
 704                 dx_db = &dx_dir->dx_block[blk];
 705                 if (dx_db->flags & DX_FLAG_REFERENCED) {
 706                         dx_db->flags |= DX_FLAG_DUP_REF;
 707                 } else {
 708                         dx_db->flags |= DX_FLAG_REFERENCED;
 709                         dx_db->parent = db->blockcnt;
 710                 }
 711
 712                 dx_db->previous =
 713                         i ? (ext2fs_le32_to_cpu(ent[i-1].block) &
 714                              EXT4_DX_BLOCK_MASK) : 0;
 715
 716                 if (hash < min_hash)
 717                         min_hash = hash;
 718                 if (hash > max_hash)
 719                         max_hash = hash;
 720                 dx_db->node_min_hash = hash;
 721                 if ((i+1) < count)
 722                         dx_db->node_max_hash =
 723                           ext2fs_le32_to_cpu(ent[i+1].hash) & ~1;
 724                 else {
 725                         dx_db->node_max_hash = 0xfffffffe;
 726                         dx_db->flags |= DX_FLAG_LAST;
 727                 }
 728                 if (i == 0)
 729                         dx_db->flags |= DX_FLAG_FIRST;
 730         }
 731 #ifdef DX_DEBUG
 732         printf("Blockcnt = %d, min hash 0x%08x, max hash 0x%08x\n",
 733                db->blockcnt, min_hash, max_hash);
 734 #endif
 735         dx_db = &dx_dir->dx_block[db->blockcnt];
 736         dx_db->min_hash = min_hash;
 737         dx_db->max_hash = max_hash;
 738         return;
 739
 740 clear_and_exit:
 741         clear_htree(cd->ctx, cd->pctx.ino);
 742         dx_dir->numblocks = 0;
 743         e2fsck_rehash_dir_later(cd->ctx, cd->pctx.ino);
 744 }
 745
 746 /*
 747  * Given a busted directory, try to salvage it somehow.
 748  *
 749  */
 750 static void salvage_directory(ext2_filsys fs,
 751                               struct ext2_dir_entry *dirent,
 752                               struct ext2_dir_entry *prev,
 753                               unsigned int *offset,
 754                               unsigned int block_len,
 755                               int hash_in_dirent)
 756 {
 757         char    *cp = (char *) dirent;
 758         int left;
 759         unsigned int rec_len, prev_rec_len;
 760         unsigned int name_len;
 761
 762         /*
 763          * If the space left for the entry is too small to be an entry,
 764          * we can't access dirent's fields, so plumb in the values needed
 765          * so that the previous entry absorbs this one.
 766          */
 767         if (block_len - *offset < EXT2_DIR_ENTRY_HEADER_LEN) {
 768                 name_len = 0;
 769                 rec_len = block_len - *offset;
 770         } else {
 771                 name_len = ext2fs_dirent_name_len(dirent);
 772                 (void) ext2fs_get_rec_len(fs, dirent, &rec_len);
 773         }
 774         left = block_len - *offset - rec_len;
 775
 776         /*
 777          * Special case of directory entry of size 8: copy what's left
 778          * of the directory block up to cover up the invalid hole.
 779          */
 780         if ((left >= ext2fs_dir_rec_len(1, hash_in_dirent)) &&
 781              (rec_len == EXT2_DIR_ENTRY_HEADER_LEN)) {
 782                 memmove(cp, cp+EXT2_DIR_ENTRY_HEADER_LEN, left);
 783                 memset(cp + left, 0, EXT2_DIR_ENTRY_HEADER_LEN);
 784                 return;
 785         }
 786         /*
 787          * If the directory entry overruns the end of the directory
 788          * block, and the name is small enough to fit, then adjust the
 789          * record length.
 790          */
 791         if ((left < 0) &&
 792             ((int) rec_len + left > EXT2_DIR_ENTRY_HEADER_LEN) &&
 793             ((int) ext2fs_dir_rec_len(name_len, hash_in_dirent) <= (int) rec_len + left) &&
 794             dirent->inode <= fs->super->s_inodes_count &&
 795             strnlen(dirent->name, name_len) == name_len) {
 796                 (void) ext2fs_set_rec_len(fs, (int) rec_len + left, dirent);
 797                 return;
 798         }
 799         /*
 800          * If the record length of the directory entry is a multiple
 801          * of four, and not too big, such that it is valid, let the
 802          * previous directory entry absorb the invalid one.
 803          */
 804         if (prev && rec_len && (rec_len % 4) == 0 &&
 805             (*offset + rec_len <= block_len)) {
 806                 (void) ext2fs_get_rec_len(fs, prev, &prev_rec_len);
 807                 prev_rec_len += rec_len;
 808                 (void) ext2fs_set_rec_len(fs, prev_rec_len, prev);
 809                 *offset += rec_len;
 810                 return;
 811         }
 812         /*
 813          * Default salvage method --- kill all of the directory
 814          * entries for the rest of the block.  We will either try to
 815          * absorb it into the previous directory entry, or create a
 816          * new empty directory entry the rest of the directory block.
 817          */
 818         if (prev) {
 819                 (void) ext2fs_get_rec_len(fs, prev, &prev_rec_len);
 820                 prev_rec_len += block_len - *offset;
 821                 (void) ext2fs_set_rec_len(fs, prev_rec_len, prev);
 822                 *offset = fs->blocksize;
 823         } else {
 824                 rec_len = block_len - *offset;
 825                 (void) ext2fs_set_rec_len(fs, rec_len, dirent);
 826                 ext2fs_dirent_set_name_len(dirent, 0);
 827                 ext2fs_dirent_set_file_type(dirent, EXT2_FT_UNKNOWN);
 828                 dirent->inode = 0;
 829         }
 830 }
 831
 832 #define NEXT_DIRENT(d)  ((void *)((char *)(d) + (d)->rec_len))
 833 static errcode_t insert_dirent_tail(ext2_filsys fs, void *dirbuf)
 834 {
 835         struct ext2_dir_entry *d;
 836         void *top;
 837         struct ext2_dir_entry_tail *t;
 838
 839         d = dirbuf;
 840         top = EXT2_DIRENT_TAIL(dirbuf, fs->blocksize);
 841
 842         while (d->rec_len && !(d->rec_len & 0x3) && NEXT_DIRENT(d) <= top)
 843                 d = NEXT_DIRENT(d);
 844
 845         if (d != top) {
 846                 unsigned int min_size = EXT2_DIR_REC_LEN(
 847                                 ext2fs_dirent_name_len(dirbuf));
 848                 if (min_size > (char *)top - (char *)d)
 849                         return EXT2_ET_DIR_NO_SPACE_FOR_CSUM;
 850                 d->rec_len = (char *)top - (char *)d;
 851         }
 852
 853         t = (struct ext2_dir_entry_tail *)top;
 854         if (t->det_reserved_zero1 ||
 855             t->det_rec_len != sizeof(struct ext2_dir_entry_tail) ||
 856             t->det_reserved_name_len != EXT2_DIR_NAME_LEN_CSUM)
 857                 ext2fs_initialize_dirent_tail(fs, t);
 858
 859         return 0;
 860 }
 861 #undef NEXT_DIRENT
 862
 863 static errcode_t fix_inline_dir_size(e2fsck_t ctx, ext2_ino_t ino,
 864                                      size_t *inline_data_size,
 865                                      struct problem_context *pctx,
 866                                      char *buf)
 867 {
 868         ext2_filsys fs = ctx->fs;
 869         struct ext2_inode inode;
 870         size_t new_size, old_size;
 871         errcode_t retval;
 872
 873         old_size = *inline_data_size;
 874         /*
 875          * If there's not enough bytes to start the "second" dir block
 876          * (in the EA space) then truncate everything to the first block.
 877          */
 878         if (old_size > EXT4_MIN_INLINE_DATA_SIZE &&
 879             old_size < EXT4_MIN_INLINE_DATA_SIZE +
 880                        EXT2_DIR_REC_LEN(1)) {
 881                 old_size = EXT4_MIN_INLINE_DATA_SIZE;
 882                 new_size = old_size;
 883         } else
 884                 /* Increase to the next four-byte boundary for salvaging */
 885                 new_size = old_size + (4 - (old_size & 3));
 886         memset(buf + old_size, 0, new_size - old_size);
 887         retval = ext2fs_inline_data_set(fs, ino, 0, buf, new_size);
 888         if (retval == EXT2_ET_INLINE_DATA_NO_SPACE) {
 889                 /* Or we can't, so truncate. */
 890                 new_size -= 4;
 891                 retval = ext2fs_inline_data_set(fs, ino, 0, buf, new_size);
 892                 if (retval) {
 893                         if (fix_problem(ctx, PR_2_FIX_INLINE_DIR_FAILED,
 894                                         pctx)) {
 895                                 new_size = 0;
 896                                 goto write_inode;
 897                         }
 898                         goto err;
 899                 }
 900         } else if (retval) {
 901                 if (fix_problem(ctx, PR_2_FIX_INLINE_DIR_FAILED,
 902                                 pctx)) {
 903                         new_size = 0;
 904                         goto write_inode;
 905                 }
 906                 goto err;
 907         }
 908
 909 write_inode:
 910         retval = ext2fs_read_inode(fs, ino, &inode);
 911         if (retval)
 912                 goto err;
 913
 914         retval = ext2fs_inode_size_set(fs, &inode, new_size);
 915         if (retval)
 916                 goto err;
 917         if (new_size == 0)
 918                 inode.i_flags &= ~EXT4_INLINE_DATA_FL;
 919         retval = ext2fs_write_inode(fs, ino, &inode);
 920         if (retval)
 921                 goto err;
 922         *inline_data_size = new_size;
 923
 924 err:
 925         return retval;
 926 }
 927
 928 /* Return true if this type of file needs encryption */
 929 static int needs_encryption(e2fsck_t ctx, const struct ext2_dir_entry *dirent)
 930 {
 931         int filetype = ext2fs_dirent_file_type(dirent);
 932         ext2_ino_t ino = dirent->inode;
 933         struct ext2_inode inode;
 934
 935         if (filetype != EXT2_FT_UNKNOWN)
 936                 return filetype == EXT2_FT_REG_FILE ||
 937                        filetype == EXT2_FT_DIR ||
 938                        filetype == EXT2_FT_SYMLINK;
 939
 940         if (ext2fs_test_inode_bitmap2(ctx->inode_reg_map, ino) ||
 941             ext2fs_test_inode_bitmap2(ctx->inode_dir_map, ino))
 942                 return 1;
 943
 944         e2fsck_read_inode(ctx, ino, &inode, "check_encryption_policy");
 945         return LINUX_S_ISREG(inode.i_mode) ||
 946                LINUX_S_ISDIR(inode.i_mode) ||
 947                LINUX_S_ISLNK(inode.i_mode);
 948 }
 949
 950 /*
 951  * All regular files, directories, and symlinks in encrypted directories must be
 952  * encrypted using the same encryption policy as their directory.
 953  *
 954  * Returns 1 if the dirent should be cleared, otherwise 0.
 955  */
 956 static int check_encryption_policy(e2fsck_t ctx,
 957                                    const struct ext2_dir_entry *dirent,
 958                                    __u32 dir_encpolicy_id,
 959                                    struct problem_context *pctx)
 960 {
 961         __u32 file_encpolicy_id = find_encryption_policy(ctx, dirent->inode);
 962
 963         /* Same policy or both UNRECOGNIZED_ENCRYPTION_POLICY? */
 964         if (file_encpolicy_id == dir_encpolicy_id)
 965                 return 0;
 966
 967         if (file_encpolicy_id == NO_ENCRYPTION_POLICY) {
 968                 if (!needs_encryption(ctx, dirent))
 969                         return 0;
 970                 return fix_problem(ctx, PR_2_UNENCRYPTED_FILE, pctx);
 971         }
 972
 973         return fix_problem(ctx, PR_2_INCONSISTENT_ENCRYPTION_POLICY, pctx);
 974 }
 975
 976 /*
 977  * Check an encrypted directory entry.
 978  *
 979  * Returns 1 if the dirent should be cleared, otherwise 0.
 980  */
 981 static int check_encrypted_dirent(e2fsck_t ctx,
 982                                   const struct ext2_dir_entry *dirent,
 983                                   __u32 dir_encpolicy_id,
 984                                   struct problem_context *pctx)
 985 {
 986         if (encrypted_check_name(ctx, dirent, pctx))
 987                 return 1;
 988         if (check_encryption_policy(ctx, dirent, dir_encpolicy_id, pctx))
 989                 return 1;
 990         return 0;
 991 }
 992
 993 static int check_dir_block2(ext2_filsys fs,
 994                            struct ext2_db_entry2 *db,
 995                            void *priv_data)
 996 {
 997         int err;
 998         struct check_dir_struct *cd = priv_data;
 999
1000         if (cd->ra_entries && cd->list_offset >= cd->next_ra_off) {
1001                 err = e2fsck_readahead_dblist(fs,
1002                                         E2FSCK_RA_DBLIST_IGNORE_BLOCKCNT,
1003                                         fs->dblist,
1004                                         cd->list_offset + cd->ra_entries / 8,
1005                                         cd->ra_entries);
1006                 if (err)
1007                         cd->ra_entries = 0;
1008                 cd->next_ra_off = cd->list_offset + (cd->ra_entries * 7 / 8);
1009         }
1010
1011         err = check_dir_block(fs, db, priv_data);
1012         cd->list_offset++;
1013         return err;
1014 }
1015
1016 static int check_dir_block(ext2_filsys fs,
1017                            struct ext2_db_entry2 *db,
1018                            void *priv_data)
1019 {
1020         struct dx_dir_info      *dx_dir;
1021         struct dx_dirblock_info *dx_db = 0;
1022         struct ext2_dir_entry   *dirent, *prev, dot, dotdot;
1023         ext2_dirhash_t          hash;
1024         unsigned int            offset = 0;
1025         int                     dir_modified = 0;
1026         int                     dot_state;
1027         unsigned int            rec_len;
1028         blk64_t                 block_nr = db->blk;
1029         ext2_ino_t              ino = db->ino;
1030         ext2_ino_t              subdir_parent;
1031         __u16                   links;
1032         struct check_dir_struct *cd;
1033         char                    *buf, *ibuf;
1034         e2fsck_t                ctx;
1035         problem_t               problem;
1036         struct ext2_dx_root_info *root;
1037         struct ext2_dx_countlimit *limit;
1038         static dict_t de_dict;
1039         struct problem_context  pctx;
1040         int     dups_found = 0;
1041         int     ret;
1042         int     dx_csum_size = 0, de_csum_size = 0;
1043         int     failed_csum = 0;
1044         int     is_leaf = 1;
1045         size_t  inline_data_size = 0;
1046         int     filetype = 0;
1047         __u32   dir_encpolicy_id = NO_ENCRYPTION_POLICY;
1048         int     hash_in_dirent = 0;
1049         int     casefolded = 0;
1050         size_t  max_block_size;
1051         int     hash_flags = 0;
1052         static char *eop_read_dirblock = NULL;
1053         int cf_dir = 0;
1054
1055         cd = (struct check_dir_struct *) priv_data;
1056         ibuf = buf = cd->buf;
1057         ctx = cd->ctx;
1058
1059         /* We only want filename encoding verification on strict
1060          * mode or if explicitly requested by user. */
1061         if (ext2fs_test_inode_bitmap2(ctx->inode_casefold_map, ino) &&
1062             ((ctx->fs->super->s_encoding_flags & EXT4_ENC_STRICT_MODE_FL) ||
1063              (ctx->options & E2F_OPT_CHECK_ENCODING)))
1064                 cf_dir = 1;
1065
1066         if (ctx->flags & E2F_FLAG_RUN_RETURN)
1067                 return DIRENT_ABORT;
1068
1069         if (ctx->progress && (ctx->progress)(ctx, 2, cd->count++, cd->max))
1070                 return DIRENT_ABORT;
1071
1072         if (ext2fs_has_feature_metadata_csum(fs->super)) {
1073                 dx_csum_size = sizeof(struct ext2_dx_tail);
1074                 de_csum_size = sizeof(struct ext2_dir_entry_tail);
1075         }
1076
1077         if (ext2fs_has_feature_filetype(fs->super))
1078                 filetype = EXT2_FT_DIR << 8;
1079
1080         /*
1081          * Make sure the inode is still in use (could have been
1082          * deleted in the duplicate/bad blocks pass.
1083          */
1084         if (!(ext2fs_test_inode_bitmap2(ctx->inode_used_map, ino)))
1085                 return 0;
1086
1087         cd->pctx.ino = ino;
1088         cd->pctx.blk = block_nr;
1089         cd->pctx.blkcount = db->blockcnt;
1090         cd->pctx.ino2 = 0;
1091         cd->pctx.dirent = 0;
1092         cd->pctx.num = 0;
1093
1094         if (ext2fs_has_feature_inline_data(fs->super)) {
1095                 errcode_t ec;
1096
1097                 ec = ext2fs_inline_data_size(fs, ino, &inline_data_size);
1098                 if (ec && ec != EXT2_ET_NO_INLINE_DATA)
1099                         return DIRENT_ABORT;
1100         }
1101
1102         /* This will allow (at some point in the future) to punch out empty
1103          * directory blocks and reduce the space used by a directory that grows
1104          * very large and then the files are deleted. For now, all that is
1105          * needed is to avoid e2fsck filling in these holes as part of
1106          * feature flag. */
1107         if (db->blk == 0 && ext2fs_has_feature_largedir(fs->super) &&
1108             !ext2fs_has_feature_inline_data(fs->super))
1109                 return 0;
1110
1111         if (db->blk == 0 && !inline_data_size) {
1112                 if (allocate_dir_block(ctx, db, buf, &cd->pctx))
1113                         return 0;
1114                 block_nr = db->blk;
1115         }
1116
1117         if (db->blockcnt)
1118                 dot_state = 2;
1119         else
1120                 dot_state = 0;
1121
1122         if (ctx->dirs_to_hash &&
1123             ext2fs_u32_list_test(ctx->dirs_to_hash, ino))
1124                 dups_found++;
1125
1126 #if 0
1127         printf("In process_dir_block block %lu, #%d, inode %lu\n", block_nr,
1128                db->blockcnt, ino);
1129 #endif
1130
1131         if (!eop_read_dirblock)
1132                 eop_read_dirblock = (char *) _("reading directory block");
1133         ehandler_operation(eop_read_dirblock);
1134         if (inline_data_size) {
1135                 memset(buf, 0, fs->blocksize - inline_data_size);
1136                 cd->pctx.errcode = ext2fs_inline_data_get(fs, ino, 0, buf, 0);
1137                 if (cd->pctx.errcode)
1138                         goto inline_read_fail;
1139 #ifdef WORDS_BIGENDIAN
1140                 if (db->blockcnt)
1141                         goto skip_first_read_swab;
1142                 *((__u32 *)buf) = ext2fs_le32_to_cpu(*((__u32 *)buf));
1143                 cd->pctx.errcode = ext2fs_dirent_swab_in2(fs,
1144                                 buf + EXT4_INLINE_DATA_DOTDOT_SIZE,
1145                                 EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DATA_DOTDOT_SIZE,
1146                                 0);
1147                 if (cd->pctx.errcode)
1148                         goto inline_read_fail;
1149 skip_first_read_swab:
1150                 if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE ||
1151                     !db->blockcnt)
1152                         goto inline_read_fail;
1153                 cd->pctx.errcode = ext2fs_dirent_swab_in2(fs,
1154                                 buf + EXT4_MIN_INLINE_DATA_SIZE,
1155                                 inline_data_size - EXT4_MIN_INLINE_DATA_SIZE,
1156                                 0);
1157 #endif
1158         } else
1159                 cd->pctx.errcode = ext2fs_read_dir_block4(fs, block_nr,
1160                                                           buf, 0, ino);
1161 inline_read_fail:
1162         pctx.ino = ino;
1163         pctx.num = inline_data_size;
1164         if (((inline_data_size & 3) ||
1165              (inline_data_size > EXT4_MIN_INLINE_DATA_SIZE &&
1166               inline_data_size < EXT4_MIN_INLINE_DATA_SIZE +
1167                                  EXT2_DIR_REC_LEN(1))) &&
1168             fix_problem(ctx, PR_2_BAD_INLINE_DIR_SIZE, &pctx)) {
1169                 errcode_t err = fix_inline_dir_size(ctx, ino,
1170                                                     &inline_data_size, &pctx,
1171                                                     buf);
1172                 if (err)
1173                         return DIRENT_ABORT;
1174
1175         }
1176         ehandler_operation(0);
1177         if (cd->pctx.errcode == EXT2_ET_DIR_CORRUPTED)
1178                 cd->pctx.errcode = 0; /* We'll handle this ourselves */
1179         else if (cd->pctx.errcode == EXT2_ET_DIR_CSUM_INVALID) {
1180                 cd->pctx.errcode = 0; /* We'll handle this ourselves */
1181                 failed_csum = 1;
1182         }
1183         if (cd->pctx.errcode) {
1184                 char *buf2;
1185                 if (!fix_problem(ctx, PR_2_READ_DIRBLOCK, &cd->pctx)) {
1186                         ctx->flags |= E2F_FLAG_ABORT;
1187                         return DIRENT_ABORT;
1188                 }
1189                 ext2fs_new_dir_block(fs, db->blockcnt == 0 ? ino : 0,
1190                                      EXT2_ROOT_INO, &buf2);
1191                 memcpy(buf, buf2, fs->blocksize);
1192                 ext2fs_free_mem(&buf2);
1193         }
1194         dx_dir = e2fsck_get_dx_dir_info(ctx, ino);
1195         if (dx_dir && dx_dir->numblocks) {
1196                 if (db->blockcnt >= dx_dir->numblocks) {
1197                         pctx.dir = ino;
1198                         if (fix_problem(ctx, PR_2_UNEXPECTED_HTREE_BLOCK,
1199                                         &pctx)) {
1200                                 clear_htree(ctx, ino);
1201                                 dx_dir->numblocks = 0;
1202                                 dx_db = 0;
1203                                 goto out_htree;
1204                         }
1205                         fatal_error(ctx, _("Can not continue."));
1206                 }
1207                 dx_db = &dx_dir->dx_block[db->blockcnt];
1208                 dx_db->type = DX_DIRBLOCK_LEAF;
1209                 dx_db->phys = block_nr;
1210                 dx_db->min_hash = ~0;
1211                 dx_db->max_hash = 0;
1212
1213                 dirent = (struct ext2_dir_entry *) buf;
1214                 (void) ext2fs_get_rec_len(fs, dirent, &rec_len);
1215                 limit = (struct ext2_dx_countlimit *) (buf+8);
1216                 if (db->blockcnt == 0) {
1217                         root = (struct ext2_dx_root_info *) (buf + 24);
1218                         dx_db->type = DX_DIRBLOCK_ROOT;
1219                         dx_db->flags |= DX_FLAG_FIRST | DX_FLAG_LAST;
1220
1221                         /* large_dir was set in pass1 if large dirs were found,
1222                          * so ext2_dir_htree_level() should now be correct */
1223                         if ((root->reserved_zero ||
1224                              root->info_length < 8 ||
1225                              root->indirect_levels >=
1226                              ext2_dir_htree_level(fs)) &&
1227                             fix_problem(ctx, PR_2_HTREE_BAD_ROOT, &cd->pctx)) {
1228                                 clear_htree(ctx, ino);
1229                                 dx_dir->numblocks = 0;
1230                                 dx_db = NULL;
1231                         }
1232                         dx_dir->hashversion = root->hash_version;
1233                         if ((dx_dir->hashversion <= EXT2_HASH_TEA) &&
1234                             (fs->super->s_flags & EXT2_FLAGS_UNSIGNED_HASH))
1235                                 dx_dir->hashversion += 3;
1236                         dx_dir->depth = root->indirect_levels + 1;
1237                 } else if ((dirent->inode == 0) &&
1238                            (rec_len == fs->blocksize) &&
1239                            (ext2fs_dirent_name_len(dirent) == 0) &&
1240                            (ext2fs_le16_to_cpu(limit->limit) ==
1241                             ((fs->blocksize - (8 + dx_csum_size)) /
1242                              sizeof(struct ext2_dx_entry)))) {
1243                         dx_db->type = DX_DIRBLOCK_NODE;
1244                 }
1245                 is_leaf = dx_db ? (dx_db->type == DX_DIRBLOCK_LEAF) : 0;
1246         }
1247 out_htree:
1248
1249         /* Leaf node with no space for csum?  Rebuild dirs in pass 3A. */
1250         if (is_leaf && !inline_data_size && failed_csum &&
1251             !ext2fs_dirent_has_tail(fs, (struct ext2_dir_entry *)buf)) {
1252                 de_csum_size = 0;
1253                 if (e2fsck_dir_will_be_rehashed(ctx, ino)) {
1254                         failed_csum = 0;
1255                         goto skip_checksum;
1256                 }
1257                 if (!fix_problem(cd->ctx, PR_2_LEAF_NODE_MISSING_CSUM,
1258                                  &cd->pctx))
1259                         goto skip_checksum;
1260                 e2fsck_rehash_dir_later(ctx, ino);
1261                 failed_csum = 0;
1262                 goto skip_checksum;
1263         }
1264         /* htree nodes don't use fake dirents to store checksums */
1265         if (!is_leaf)
1266                 de_csum_size = 0;
1267
1268 skip_checksum:
1269         if (inline_data_size) {
1270                 if (db->blockcnt) {
1271                         buf += EXT4_MIN_INLINE_DATA_SIZE;
1272                         max_block_size = inline_data_size - EXT4_MIN_INLINE_DATA_SIZE;
1273                         /* Zero-length second block, just exit */
1274                         if (max_block_size == 0)
1275                                 return 0;
1276                 } else {
1277                         max_block_size = EXT4_MIN_INLINE_DATA_SIZE;
1278                 }
1279         } else
1280                 max_block_size = fs->blocksize - de_csum_size;
1281
1282         dir_encpolicy_id = find_encryption_policy(ctx, ino);
1283
1284         if (cf_dir) {
1285                 dict_init(&de_dict, DICTCOUNT_T_MAX, dict_de_cf_cmp);
1286                 dict_set_cmp_context(&de_dict, (void *)ctx->fs->encoding);
1287         } else {
1288                 dict_init(&de_dict, DICTCOUNT_T_MAX, dict_de_cmp);
1289         }
1290         if (ctx->casefolded_dirs)
1291                 casefolded = ext2fs_u32_list_test(ctx->casefolded_dirs, ino);
1292         hash_in_dirent = (casefolded &&
1293                           (dir_encpolicy_id != NO_ENCRYPTION_POLICY));
1294
1295         prev = 0;
1296         do {
1297                 dgrp_t group;
1298                 ext2_ino_t first_unused_inode;
1299                 unsigned int name_len;
1300                 /* csum entry is not checked here, so don't worry about it */
1301                 int extended = (dot_state > 1) && hash_in_dirent;
1302                 int min_dir_len = ext2fs_dir_rec_len(1, extended);
1303
1304                 problem = 0;
1305                 if (!inline_data_size || dot_state > 1) {
1306                         dirent = (struct ext2_dir_entry *) (buf + offset);
1307                         /*
1308                          * If there's not even space for the entry header,
1309                          * force salvaging this dir.
1310                          */
1311                         if (max_block_size - offset < EXT2_DIR_ENTRY_HEADER_LEN)
1312                                 rec_len = ext2fs_dir_rec_len(1, extended);
1313                         else
1314                                 (void) ext2fs_get_rec_len(fs, dirent, &rec_len);
1315                         cd->pctx.dirent = dirent;
1316                         cd->pctx.num = offset;
1317                         if ((offset + rec_len > max_block_size) ||
1318                             (rec_len < min_dir_len) ||
1319                             ((rec_len % 4) != 0) ||
1320                             ((ext2fs_dir_rec_len(ext2fs_dirent_name_len(dirent),
1321                                                  extended)) > rec_len)) {
1322                                 if (fix_problem(ctx, PR_2_DIR_CORRUPTED,
1323                                                 &cd->pctx)) {
1324 #ifdef WORDS_BIGENDIAN
1325                                         /*
1326                                          * On big-endian systems, if the dirent
1327                                          * swap routine finds a rec_len that it
1328                                          * doesn't like, it continues
1329                                          * processing the block as if rec_len
1330                                          * == EXT2_DIR_ENTRY_HEADER_LEN.  This means that the name
1331                                          * field gets byte swapped, which means
1332                                          * that salvage will not detect the
1333                                          * correct name length (unless the name
1334                                          * has a length that's an exact
1335                                          * multiple of four bytes), and it'll
1336                                          * discard the entry (unnecessarily)
1337                                          * and the rest of the dirent block.
1338                                          * Therefore, swap the rest of the
1339                                          * block back to disk order, run
1340                                          * salvage, and re-swap anything after
1341                                          * the salvaged dirent.
1342                                          */
1343                                         int need_reswab = 0;
1344                                         if (rec_len < EXT2_DIR_ENTRY_HEADER_LEN || rec_len % 4) {
1345                                                 need_reswab = 1;
1346                                                 ext2fs_dirent_swab_in2(fs,
1347                                                         ((char *)dirent) + EXT2_DIR_ENTRY_HEADER_LEN,
1348                                                         max_block_size - offset - EXT2_DIR_ENTRY_HEADER_LEN,
1349                                                         0);
1350                                         }
1351 #endif
1352                                         salvage_directory(fs, dirent, prev,
1353                                                           &offset,
1354                                                           max_block_size,
1355                                                           hash_in_dirent);
1356 #ifdef WORDS_BIGENDIAN
1357                                         if (need_reswab) {
1358                                                 (void) ext2fs_get_rec_len(fs,
1359                                                         dirent, &rec_len);
1360                                                 ext2fs_dirent_swab_in2(fs,
1361                                                         ((char *)dirent) + offset + rec_len,
1362                                                         max_block_size - offset - rec_len,
1363                                                         0);
1364                                         }
1365 #endif
1366                                         dir_modified++;
1367                                         continue;
1368                                 } else
1369                                         goto abort_free_dict;
1370                         }
1371                 } else {
1372                         if (dot_state == 0) {
1373                                 memset(&dot, 0, sizeof(dot));
1374                                 dirent = &dot;
1375                                 dirent->inode = ino;
1376                                 dirent->rec_len = EXT2_DIR_REC_LEN(1);
1377                                 dirent->name_len = 1 | filetype;
1378                                 dirent->name[0] = '.';
1379                         } else if (dot_state == 1) {
1380                                 memset(&dotdot, 0, sizeof(dotdot));
1381                                 dirent = &dotdot;
1382                                 dirent->inode =
1383                                         ((struct ext2_dir_entry *)buf)->inode;
1384                                 dirent->rec_len = EXT2_DIR_REC_LEN(2);
1385                                 dirent->name_len = 2 | filetype;
1386                                 dirent->name[0] = '.';
1387                                 dirent->name[1] = '.';
1388                         } else {
1389                                 fatal_error(ctx, _("Can not continue."));
1390                         }
1391                         cd->pctx.dirent = dirent;
1392                         cd->pctx.num = offset;
1393                 }
1394
1395                 if (dot_state == 0) {
1396                         if (check_dot(ctx, dirent, ino, &cd->pctx))
1397                                 dir_modified++;
1398                 } else if (dot_state == 1) {
1399                         ret = check_dotdot(ctx, dirent, ino, &cd->pctx);
1400                         if (ret < 0)
1401                                 goto abort_free_dict;
1402                         if (ret)
1403                                 dir_modified++;
1404                 } else if (dirent->inode == ino) {
1405                         problem = PR_2_LINK_DOT;
1406                         if (fix_problem(ctx, PR_2_LINK_DOT, &cd->pctx)) {
1407                                 dirent->inode = 0;
1408                                 dir_modified++;
1409                                 goto next;
1410                         }
1411                 }
1412                 if (!dirent->inode)
1413                         goto next;
1414
1415                 /*
1416                  * Make sure the inode listed is a legal one.
1417                  */
1418                 name_len = ext2fs_dirent_name_len(dirent);
1419                 if (((dirent->inode != EXT2_ROOT_INO) &&
1420                      (dirent->inode < EXT2_FIRST_INODE(fs->super))) ||
1421                     (dirent->inode > fs->super->s_inodes_count)) {
1422                         problem = PR_2_BAD_INO;
1423                 } else if (ctx->inode_bb_map &&
1424                            (ext2fs_test_inode_bitmap2(ctx->inode_bb_map,
1425                                                      dirent->inode))) {
1426                         /*
1427                          * If the inode is in a bad block, offer to
1428                          * clear it.
1429                          */
1430                         problem = PR_2_BB_INODE;
1431                 } else if ((dot_state > 1) && (name_len == 1) &&
1432                            (dirent->name[0] == '.')) {
1433                         /*
1434                          * If there's a '.' entry in anything other
1435                          * than the first directory entry, it's a
1436                          * duplicate entry that should be removed.
1437                          */
1438                         problem = PR_2_DUP_DOT;
1439                 } else if ((dot_state > 1) && (name_len == 2) &&
1440                            (dirent->name[0] == '.') &&
1441                            (dirent->name[1] == '.')) {
1442                         /*
1443                          * If there's a '..' entry in anything other
1444                          * than the second directory entry, it's a
1445                          * duplicate entry that should be removed.
1446                          */
1447                         problem = PR_2_DUP_DOT_DOT;
1448                 } else if ((dot_state > 1) &&
1449                            (dirent->inode == EXT2_ROOT_INO)) {
1450                         /*
1451                          * Don't allow links to the root directory.
1452                          * We check this specially to make sure we
1453                          * catch this error case even if the root
1454                          * directory hasn't been created yet.
1455                          */
1456                         problem = PR_2_LINK_ROOT;
1457                 } else if ((dot_state > 1) && (name_len == 0)) {
1458                         /*
1459                          * Don't allow zero-length directory names.
1460                          */
1461                         problem = PR_2_NULL_NAME;
1462                 }
1463
1464                 if (problem) {
1465                         if (fix_problem(ctx, problem, &cd->pctx)) {
1466                                 dirent->inode = 0;
1467                                 dir_modified++;
1468                                 goto next;
1469                         } else {
1470                                 ext2fs_unmark_valid(fs);
1471                                 if (problem == PR_2_BAD_INO)
1472                                         goto next;
1473                         }
1474                 }
1475
1476                 /*
1477                  * If the inode was marked as having bad fields in
1478                  * pass1, process it and offer to fix/clear it.
1479                  * (We wait until now so that we can display the
1480                  * pathname to the user.)
1481                  */
1482                 if (ctx->inode_bad_map &&
1483                     ext2fs_test_inode_bitmap2(ctx->inode_bad_map,
1484                                              dirent->inode)) {
1485                         if (e2fsck_process_bad_inode(ctx, ino,
1486                                                      dirent->inode,
1487                                                      buf + fs->blocksize)) {
1488                                 dirent->inode = 0;
1489                                 dir_modified++;
1490                                 goto next;
1491                         }
1492                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1493                                 return DIRENT_ABORT;
1494                 }
1495
1496                 group = ext2fs_group_of_ino(fs, dirent->inode);
1497                 first_unused_inode = group * fs->super->s_inodes_per_group +
1498                                         1 + fs->super->s_inodes_per_group -
1499                                         ext2fs_bg_itable_unused(fs, group);
1500                 cd->pctx.group = group;
1501
1502                 /*
1503                  * Check if the inode was missed out because
1504                  * _INODE_UNINIT flag was set or bg_itable_unused was
1505                  * incorrect.  If so, clear the _INODE_UNINIT flag and
1506                  * restart e2fsck.  In the future it would be nice if
1507                  * we could call a function in pass1.c that checks the
1508                  * newly visible inodes.
1509                  */
1510                 if (ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT)) {
1511                         pctx.num = dirent->inode;
1512                         if (fix_problem(ctx, PR_2_INOREF_BG_INO_UNINIT,
1513                                         &cd->pctx)){
1514                                 ext2fs_bg_flags_clear(fs, group,
1515                                                       EXT2_BG_INODE_UNINIT);
1516                                 ext2fs_mark_super_dirty(fs);
1517                                 ctx->flags |= E2F_FLAG_RESTART_LATER;
1518                         } else {
1519                                 ext2fs_unmark_valid(fs);
1520                                 if (problem == PR_2_BAD_INO)
1521                                         goto next;
1522                         }
1523                 } else if (dirent->inode >= first_unused_inode) {
1524                         pctx.num = dirent->inode;
1525                         if (fix_problem(ctx, PR_2_INOREF_IN_UNUSED, &cd->pctx)){
1526                                 ext2fs_bg_itable_unused_set(fs, group, 0);
1527                                 ext2fs_mark_super_dirty(fs);
1528                                 ctx->flags |= E2F_FLAG_RESTART_LATER;
1529                         } else {
1530                                 ext2fs_unmark_valid(fs);
1531                                 if (problem == PR_2_BAD_INO)
1532                                         goto next;
1533                         }
1534                 }
1535
1536                 /*
1537                  * Offer to clear unused inodes; if we are going to be
1538                  * restarting the scan due to bg_itable_unused being
1539                  * wrong, then don't clear any inodes to avoid zapping
1540                  * inodes that were skipped during pass1 due to an
1541                  * incorrect bg_itable_unused; we'll get any real
1542                  * problems after we restart.
1543                  */
1544                 if (!(ctx->flags & E2F_FLAG_RESTART_LATER) &&
1545                     !(ext2fs_test_inode_bitmap2(ctx->inode_used_map,
1546                                                 dirent->inode)))
1547                         problem = PR_2_UNUSED_INODE;
1548
1549                 if (problem) {
1550                         if (fix_problem(ctx, problem, &cd->pctx)) {
1551                                 dirent->inode = 0;
1552                                 dir_modified++;
1553                                 goto next;
1554                         } else {
1555                                 ext2fs_unmark_valid(fs);
1556                                 if (problem == PR_2_BAD_INO)
1557                                         goto next;
1558                         }
1559                 }
1560
1561                 if (check_filetype(ctx, dirent, ino, &cd->pctx))
1562                         dir_modified++;
1563
1564                 if (dir_encpolicy_id != NO_ENCRYPTION_POLICY) {
1565                         /* Encrypted directory */
1566                         if (dot_state > 1 &&
1567                             check_encrypted_dirent(ctx, dirent,
1568                                                    dir_encpolicy_id,
1569                                                    &cd->pctx)) {
1570                                 dirent->inode = 0;
1571                                 dir_modified++;
1572                                 goto next;
1573                         }
1574                 } else if (cf_dir) {
1575                         /* Casefolded directory */
1576                         if (encoded_check_name(ctx, dirent, &cd->pctx))
1577                                 dir_modified++;
1578                 } else {
1579                         /* Unencrypted and uncasefolded directory */
1580                         if (check_name(ctx, dirent, &cd->pctx))
1581                                 dir_modified++;
1582                 }
1583
1584                 if (dx_db) {
1585                         if (dx_dir->casefolded_hash)
1586                                 hash_flags = EXT4_CASEFOLD_FL;
1587
1588                         if (dx_dir->hashversion == EXT2_HASH_SIPHASH) {
1589                                 if (dot_state > 1)
1590                                         hash = EXT2_DIRENT_HASH(dirent);
1591                         } else {
1592                                 ext2fs_dirhash2(dx_dir->hashversion,
1593                                                 dirent->name,
1594                                                 ext2fs_dirent_name_len(dirent),
1595                                                 fs->encoding, hash_flags,
1596                                                 fs->super->s_hash_seed,
1597                                                 &hash, 0);
1598                         }
1599                         if (hash < dx_db->min_hash)
1600                                 dx_db->min_hash = hash;
1601                         if (hash > dx_db->max_hash)
1602                                 dx_db->max_hash = hash;
1603                 }
1604
1605                 /*
1606                  * If this is a directory, then mark its parent in its
1607                  * dir_info structure.  If the parent field is already
1608                  * filled in, then this directory has more than one
1609                  * hard link.  We assume the first link is correct,
1610                  * and ask the user if he/she wants to clear this one.
1611                  */
1612                 if ((dot_state > 1) &&
1613                     (ext2fs_test_inode_bitmap2(ctx->inode_dir_map,
1614                                               dirent->inode))) {
1615                         if (e2fsck_dir_info_get_parent(ctx, dirent->inode,
1616                                                        &subdir_parent)) {
1617                                 cd->pctx.ino = dirent->inode;
1618                                 fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx);
1619                                 goto abort_free_dict;
1620                         }
1621                         if (subdir_parent) {
1622                                 cd->pctx.ino2 = subdir_parent;
1623                                 if (fix_problem(ctx, PR_2_LINK_DIR,
1624                                                 &cd->pctx)) {
1625                                         dirent->inode = 0;
1626                                         dir_modified++;
1627                                         goto next;
1628                                 }
1629                                 cd->pctx.ino2 = 0;
1630                         } else {
1631                                 (void) e2fsck_dir_info_set_parent(ctx,
1632                                                   dirent->inode, ino);
1633                         }
1634                 }
1635
1636                 if (dups_found) {
1637                         ;
1638                 } else if (dict_lookup(&de_dict, dirent)) {
1639                         clear_problem_context(&pctx);
1640                         pctx.ino = ino;
1641                         pctx.dirent = dirent;
1642                         fix_problem(ctx, PR_2_REPORT_DUP_DIRENT, &pctx);
1643                         e2fsck_rehash_dir_later(ctx, ino);
1644                         dups_found++;
1645                 } else
1646                         dict_alloc_insert(&de_dict, dirent, dirent);
1647
1648                 ext2fs_icount_increment(ctx->inode_count, dirent->inode,
1649                                         &links);
1650                 if (links > 1)
1651                         ctx->fs_links_count++;
1652                 ctx->fs_total_count++;
1653         next:
1654                 prev = dirent;
1655                 if (dir_modified)
1656                         (void) ext2fs_get_rec_len(fs, dirent, &rec_len);
1657                 if (!inline_data_size || dot_state > 1) {
1658                         offset += rec_len;
1659                 } else {
1660                         if (dot_state == 1) {
1661                                 offset = 4;
1662                                 /*
1663                                  * If we get here, we're checking an inline
1664                                  * directory and we've just checked a (fake)
1665                                  * dotdot entry that we created on the stack.
1666                                  * Therefore set 'prev' to NULL so that if we
1667                                  * call salvage_directory on the next entry,
1668                                  * it won't try to absorb the next entry into
1669                                  * the on-stack dotdot entry.
1670                                  */
1671                                 prev = NULL;
1672                         }
1673                 }
1674                 dot_state++;
1675         } while (offset < max_block_size);
1676 #if 0
1677         printf("\n");
1678 #endif
1679         if (dx_db) {
1680 #ifdef DX_DEBUG
1681                 printf("db_block %d, type %d, min_hash 0x%0x, max_hash 0x%0x\n",
1682                        db->blockcnt, dx_db->type,
1683                        dx_db->min_hash, dx_db->max_hash);
1684 #endif
1685                 cd->pctx.dir = cd->pctx.ino;
1686                 if ((dx_db->type == DX_DIRBLOCK_ROOT) ||
1687                     (dx_db->type == DX_DIRBLOCK_NODE))
1688                         parse_int_node(fs, db, cd, dx_dir, buf, failed_csum);
1689         }
1690
1691         if (offset != max_block_size) {
1692                 cd->pctx.num = rec_len + offset - max_block_size;
1693                 if (fix_problem(ctx, PR_2_FINAL_RECLEN, &cd->pctx)) {
1694                         dirent->rec_len = cd->pctx.num;
1695                         dir_modified++;
1696                 }
1697         }
1698         if (dir_modified) {
1699                 int     flags, will_rehash;
1700                 /* leaf block with no tail?  Rehash dirs later. */
1701                 if (ext2fs_has_feature_metadata_csum(fs->super) &&
1702                     is_leaf &&
1703                     !inline_data_size &&
1704                     !ext2fs_dirent_has_tail(fs, (struct ext2_dir_entry *)buf)) {
1705                         if (insert_dirent_tail(fs, buf) == 0)
1706                                 goto write_and_fix;
1707                         e2fsck_rehash_dir_later(ctx, ino);
1708                 }
1709
1710 write_and_fix:
1711                 will_rehash = e2fsck_dir_will_be_rehashed(ctx, ino);
1712                 if (will_rehash) {
1713                         flags = ctx->fs->flags;
1714                         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1715                 }
1716                 if (inline_data_size) {
1717                         buf = ibuf;
1718 #ifdef WORDS_BIGENDIAN
1719                         if (db->blockcnt)
1720                                 goto skip_first_write_swab;
1721                         *((__u32 *)buf) = ext2fs_le32_to_cpu(*((__u32 *)buf));
1722                         cd->pctx.errcode = ext2fs_dirent_swab_out2(fs,
1723                                         buf + EXT4_INLINE_DATA_DOTDOT_SIZE,
1724                                         EXT4_MIN_INLINE_DATA_SIZE -
1725                                         EXT4_INLINE_DATA_DOTDOT_SIZE,
1726                                         0);
1727                         if (cd->pctx.errcode)
1728                                 goto skip_second_write_swab;
1729 skip_first_write_swab:
1730                         if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE ||
1731                             !db->blockcnt)
1732                                 goto skip_second_write_swab;
1733                         cd->pctx.errcode = ext2fs_dirent_swab_out2(fs,
1734                                         buf + EXT4_MIN_INLINE_DATA_SIZE,
1735                                         inline_data_size -
1736                                         EXT4_MIN_INLINE_DATA_SIZE,
1737                                         0);
1738 skip_second_write_swab:
1739                         if (cd->pctx.errcode &&
1740                             !fix_problem(ctx, PR_2_WRITE_DIRBLOCK, &cd->pctx))
1741                                 goto abort_free_dict;
1742 #endif
1743                         cd->pctx.errcode =
1744                                 ext2fs_inline_data_set(fs, ino, 0, buf,
1745                                                        inline_data_size);
1746                 } else
1747                         cd->pctx.errcode = ext2fs_write_dir_block4(fs, block_nr,
1748                                                                    buf, 0, ino);
1749                 if (will_rehash)
1750                         ctx->fs->flags = (flags &
1751                                           EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1752                                          (ctx->fs->flags &
1753                                           ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1754                 if (cd->pctx.errcode) {
1755                         if (!fix_problem(ctx, PR_2_WRITE_DIRBLOCK,
1756                                          &cd->pctx))
1757                                 goto abort_free_dict;
1758                 }
1759                 ext2fs_mark_changed(fs);
1760         } else if (is_leaf && failed_csum && !dir_modified) {
1761                 /*
1762                  * If a leaf node that fails csum makes it this far without
1763                  * alteration, ask the user if the checksum should be fixed.
1764                  */
1765                 if (fix_problem(ctx, PR_2_LEAF_NODE_ONLY_CSUM_INVALID,
1766                                 &cd->pctx))
1767                         goto write_and_fix;
1768         }
1769         dict_free_nodes(&de_dict);
1770         return 0;
1771 abort_free_dict:
1772         ctx->flags |= E2F_FLAG_ABORT;
1773         dict_free_nodes(&de_dict);
1774         return DIRENT_ABORT;
1775 }
1776
1777 struct del_block {
1778         e2fsck_t        ctx;
1779         e2_blkcnt_t     num;
1780         blk64_t last_cluster;
1781 };
1782
1783 /*
1784  * This function is called to deallocate a block, and is an interator
1785  * functioned called by deallocate inode via ext2fs_iterate_block().
1786  */
1787 static int deallocate_inode_block(ext2_filsys fs,
1788                                   blk64_t       *block_nr,
1789                                   e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
1790                                   blk64_t ref_block EXT2FS_ATTR((unused)),
1791                                   int ref_offset EXT2FS_ATTR((unused)),
1792                                   void *priv_data)
1793 {
1794         struct del_block *p = priv_data;
1795         blk64_t cluster = EXT2FS_B2C(fs, *block_nr);
1796
1797         if (*block_nr == 0)
1798                 return 0;
1799
1800         if (cluster == p->last_cluster)
1801                 return 0;
1802
1803         p->last_cluster = cluster;
1804         if ((*block_nr < fs->super->s_first_data_block) ||
1805             (*block_nr >= ext2fs_blocks_count(fs->super)))
1806                 return 0;
1807
1808         ext2fs_block_alloc_stats2(fs, *block_nr, -1);
1809         p->num++;
1810         return 0;
1811 }
1812
1813 /*
1814  * This function deallocates an inode
1815  */
1816 static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf)
1817 {
1818         ext2_filsys fs = ctx->fs;
1819         struct ext2_inode       inode;
1820         struct problem_context  pctx;
1821         __u32                   count;
1822         struct del_block        del_block;
1823
1824         e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
1825         clear_problem_context(&pctx);
1826         pctx.ino = ino;
1827
1828         /*
1829          * Fix up the bitmaps...
1830          */
1831         e2fsck_read_bitmaps(ctx);
1832         ext2fs_inode_alloc_stats2(fs, ino, -1, LINUX_S_ISDIR(inode.i_mode));
1833
1834         if (ext2fs_file_acl_block(fs, &inode) &&
1835             ext2fs_has_feature_xattr(fs->super)) {
1836                 pctx.errcode = ext2fs_adjust_ea_refcount3(fs,
1837                                 ext2fs_file_acl_block(fs, &inode),
1838                                 block_buf, -1, &count, ino);
1839                 if (pctx.errcode == EXT2_ET_BAD_EA_BLOCK_NUM) {
1840                         pctx.errcode = 0;
1841                         count = 1;
1842                 }
1843                 if (pctx.errcode) {
1844                         pctx.blk = ext2fs_file_acl_block(fs, &inode);
1845                         fix_problem(ctx, PR_2_ADJ_EA_REFCOUNT, &pctx);
1846                         ctx->flags |= E2F_FLAG_ABORT;
1847                         return;
1848                 }
1849                 if (count == 0) {
1850                         ext2fs_block_alloc_stats2(fs,
1851                                   ext2fs_file_acl_block(fs, &inode), -1);
1852                 }
1853                 ext2fs_file_acl_block_set(fs, &inode, 0);
1854         }
1855
1856         if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
1857                 goto clear_inode;
1858
1859         /* Inline data inodes don't have blocks to iterate */
1860         if (inode.i_flags & EXT4_INLINE_DATA_FL)
1861                 goto clear_inode;
1862
1863         if (ext2fs_needs_large_file_feature(EXT2_I_SIZE(&inode))) {
1864                 if (LINUX_S_ISREG(inode.i_mode))
1865                     ctx->large_files--;
1866                 else if (LINUX_S_ISDIR(inode.i_mode))
1867                     ctx->large_dirs--;
1868         }
1869
1870         del_block.ctx = ctx;
1871         del_block.num = 0;
1872         del_block.last_cluster = 0;
1873         pctx.errcode = ext2fs_block_iterate3(fs, ino, 0, block_buf,
1874                                              deallocate_inode_block,
1875                                              &del_block);
1876         if (pctx.errcode) {
1877                 fix_problem(ctx, PR_2_DEALLOC_INODE, &pctx);
1878                 ctx->flags |= E2F_FLAG_ABORT;
1879                 return;
1880         }
1881 clear_inode:
1882         /* Inode may have changed by block_iterate, so reread it */
1883         e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
1884         e2fsck_clear_inode(ctx, ino, &inode, 0, "deallocate_inode");
1885 }
1886
1887 /*
1888  * This function clears the htree flag on an inode
1889  */
1890 static void clear_htree(e2fsck_t ctx, ext2_ino_t ino)
1891 {
1892         struct ext2_inode       inode;
1893
1894         e2fsck_read_inode(ctx, ino, &inode, "clear_htree");
1895         inode.i_flags = inode.i_flags & ~EXT2_INDEX_FL;
1896         e2fsck_write_inode(ctx, ino, &inode, "clear_htree");
1897         if (ctx->dirs_to_hash)
1898                 ext2fs_u32_list_add(ctx->dirs_to_hash, ino);
1899 }
1900
1901
1902 int e2fsck_process_bad_inode(e2fsck_t ctx, ext2_ino_t dir,
1903                              ext2_ino_t ino, char *buf)
1904 {
1905         ext2_filsys fs = ctx->fs;
1906         struct ext2_inode       inode;
1907         int                     inode_modified = 0;
1908         int                     not_fixed = 0;
1909         unsigned char           *frag, *fsize;
1910         struct problem_context  pctx;
1911         problem_t               problem = 0;
1912
1913         e2fsck_read_inode(ctx, ino, &inode, "process_bad_inode");
1914
1915         clear_problem_context(&pctx);
1916         pctx.ino = ino;
1917         pctx.dir = dir;
1918         pctx.inode = &inode;
1919
1920         if (ext2fs_file_acl_block(fs, &inode) &&
1921             !ext2fs_has_feature_xattr(fs->super)) {
1922                 if (fix_problem(ctx, PR_2_FILE_ACL_ZERO, &pctx)) {
1923                         ext2fs_file_acl_block_set(fs, &inode, 0);
1924                         inode_modified++;
1925                 } else
1926                         not_fixed++;
1927         }
1928
1929         if (!LINUX_S_ISDIR(inode.i_mode) && !LINUX_S_ISREG(inode.i_mode) &&
1930             !LINUX_S_ISCHR(inode.i_mode) && !LINUX_S_ISBLK(inode.i_mode) &&
1931             !LINUX_S_ISLNK(inode.i_mode) && !LINUX_S_ISFIFO(inode.i_mode) &&
1932             !(LINUX_S_ISSOCK(inode.i_mode)))
1933                 problem = PR_2_BAD_MODE;
1934         else if (LINUX_S_ISCHR(inode.i_mode)
1935                  && !e2fsck_pass1_check_device_inode(fs, &inode))
1936                 problem = PR_2_BAD_CHAR_DEV;
1937         else if (LINUX_S_ISBLK(inode.i_mode)
1938                  && !e2fsck_pass1_check_device_inode(fs, &inode))
1939                 problem = PR_2_BAD_BLOCK_DEV;
1940         else if (LINUX_S_ISFIFO(inode.i_mode)
1941                  && !e2fsck_pass1_check_device_inode(fs, &inode))
1942                 problem = PR_2_BAD_FIFO;
1943         else if (LINUX_S_ISSOCK(inode.i_mode)
1944                  && !e2fsck_pass1_check_device_inode(fs, &inode))
1945                 problem = PR_2_BAD_SOCKET;
1946         else if (LINUX_S_ISLNK(inode.i_mode)
1947                  && !e2fsck_pass1_check_symlink(fs, ino, &inode, buf)) {
1948                 problem = PR_2_INVALID_SYMLINK;
1949         }
1950
1951         if (problem) {
1952                 if (fix_problem(ctx, problem, &pctx)) {
1953                         deallocate_inode(ctx, ino, 0);
1954                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1955                                 return 0;
1956                         return 1;
1957                 } else
1958                         not_fixed++;
1959                 problem = 0;
1960         }
1961
1962         if (inode.i_faddr) {
1963                 if (fix_problem(ctx, PR_2_FADDR_ZERO, &pctx)) {
1964                         inode.i_faddr = 0;
1965                         inode_modified++;
1966                 } else
1967                         not_fixed++;
1968         }
1969
1970         switch (fs->super->s_creator_os) {
1971             case EXT2_OS_HURD:
1972                 frag = &inode.osd2.hurd2.h_i_frag;
1973                 fsize = &inode.osd2.hurd2.h_i_fsize;
1974                 break;
1975             default:
1976                 frag = fsize = 0;
1977         }
1978         if (frag && *frag) {
1979                 pctx.num = *frag;
1980                 if (fix_problem(ctx, PR_2_FRAG_ZERO, &pctx)) {
1981                         *frag = 0;
1982                         inode_modified++;
1983                 } else
1984                         not_fixed++;
1985                 pctx.num = 0;
1986         }
1987         if (fsize && *fsize) {
1988                 pctx.num = *fsize;
1989                 if (fix_problem(ctx, PR_2_FSIZE_ZERO, &pctx)) {
1990                         *fsize = 0;
1991                         inode_modified++;
1992                 } else
1993                         not_fixed++;
1994                 pctx.num = 0;
1995         }
1996
1997         if ((fs->super->s_creator_os == EXT2_OS_LINUX) &&
1998             !ext2fs_has_feature_huge_file(fs->super) &&
1999             (inode.osd2.linux2.l_i_blocks_hi != 0)) {
2000                 pctx.num = inode.osd2.linux2.l_i_blocks_hi;
2001                 if (fix_problem(ctx, PR_2_BLOCKS_HI_ZERO, &pctx)) {
2002                         inode.osd2.linux2.l_i_blocks_hi = 0;
2003                         inode_modified++;
2004                 }
2005         }
2006
2007         if ((fs->super->s_creator_os == EXT2_OS_LINUX) &&
2008             !ext2fs_has_feature_64bit(fs->super) &&
2009             inode.osd2.linux2.l_i_file_acl_high != 0) {
2010                 pctx.num = inode.osd2.linux2.l_i_file_acl_high;
2011                 if (fix_problem(ctx, PR_2_I_FILE_ACL_HI_ZERO, &pctx)) {
2012                         inode.osd2.linux2.l_i_file_acl_high = 0;
2013                         inode_modified++;
2014                 } else
2015                         not_fixed++;
2016         }
2017
2018         if (ext2fs_file_acl_block(fs, &inode) &&
2019             ((ext2fs_file_acl_block(fs, &inode) < fs->super->s_first_data_block) ||
2020              (ext2fs_file_acl_block(fs, &inode) >= ext2fs_blocks_count(fs->super)))) {
2021                 if (fix_problem(ctx, PR_2_FILE_ACL_BAD, &pctx)) {
2022                         ext2fs_file_acl_block_set(fs, &inode, 0);
2023                         inode_modified++;
2024                 } else
2025                         not_fixed++;
2026         }
2027         if (inode.i_size_high && !ext2fs_has_feature_largedir(fs->super) &&
2028             inode.i_blocks < 1ULL << (29 - EXT2_BLOCK_SIZE_BITS(fs->super)) &&
2029             LINUX_S_ISDIR(inode.i_mode)) {
2030                 if (fix_problem(ctx, PR_2_DIR_SIZE_HIGH_ZERO, &pctx)) {
2031                         inode.i_size_high = 0;
2032                         inode_modified++;
2033                 } else
2034                         not_fixed++;
2035         }
2036
2037         if (inode_modified)
2038                 e2fsck_write_inode(ctx, ino, &inode, "process_bad_inode");
2039         if (!not_fixed && ctx->inode_bad_map)
2040                 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
2041         return 0;
2042 }
2043
2044 /*
2045  * allocate_dir_block --- this function allocates a new directory
2046  *      block for a particular inode; this is done if a directory has
2047  *      a "hole" in it, or if a directory has a illegal block number
2048  *      that was zeroed out and now needs to be replaced.
2049  */
2050 static int allocate_dir_block(e2fsck_t ctx,
2051                               struct ext2_db_entry2 *db,
2052                               char *buf EXT2FS_ATTR((unused)),
2053                               struct problem_context *pctx)
2054 {
2055         ext2_filsys fs = ctx->fs;
2056         blk64_t                 blk = 0;
2057         char                    *block;
2058         struct ext2_inode       inode;
2059
2060         if (fix_problem(ctx, PR_2_DIRECTORY_HOLE, pctx) == 0)
2061                 return 1;
2062
2063         /*
2064          * Read the inode and block bitmaps in; we'll be messing with
2065          * them.
2066          */
2067         e2fsck_read_bitmaps(ctx);
2068
2069         /*
2070          * First, find a free block
2071          */
2072         e2fsck_read_inode(ctx, db->ino, &inode, "allocate_dir_block");
2073         pctx->errcode = ext2fs_map_cluster_block(fs, db->ino, &inode,
2074                                                  db->blockcnt, &blk);
2075         if (pctx->errcode || blk == 0) {
2076                 blk = ext2fs_find_inode_goal(fs, db->ino, &inode, db->blockcnt);
2077                 pctx->errcode = ext2fs_new_block2(fs, blk,
2078                                                   ctx->block_found_map, &blk);
2079                 if (pctx->errcode) {
2080                         pctx->str = "ext2fs_new_block";
2081                         fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
2082                         return 1;
2083                 }
2084         }
2085         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
2086         ext2fs_mark_block_bitmap2(fs->block_map, blk);
2087         ext2fs_mark_bb_dirty(fs);
2088
2089         /*
2090          * Now let's create the actual data block for the inode
2091          */
2092         if (db->blockcnt)
2093                 pctx->errcode = ext2fs_new_dir_block(fs, 0, 0, &block);
2094         else
2095                 pctx->errcode = ext2fs_new_dir_block(fs, db->ino,
2096                                                      EXT2_ROOT_INO, &block);
2097
2098         if (pctx->errcode) {
2099                 pctx->str = "ext2fs_new_dir_block";
2100                 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
2101                 return 1;
2102         }
2103
2104         pctx->errcode = ext2fs_write_dir_block4(fs, blk, block, 0, db->ino);
2105         ext2fs_free_mem(&block);
2106         if (pctx->errcode) {
2107                 pctx->str = "ext2fs_write_dir_block";
2108                 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
2109                 return 1;
2110         }
2111
2112         /*
2113          * Update the inode block count
2114          */
2115         ext2fs_iblk_add_blocks(fs, &inode, 1);
2116         if (EXT2_I_SIZE(&inode) < ((__u64) db->blockcnt+1) * fs->blocksize) {
2117                 pctx->errcode = ext2fs_inode_size_set(fs, &inode,
2118                                         (db->blockcnt+1) * fs->blocksize);
2119                 if (pctx->errcode) {
2120                         pctx->str = "ext2fs_inode_size_set";
2121                         fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
2122                         return 1;
2123                 }
2124         }
2125         e2fsck_write_inode(ctx, db->ino, &inode, "allocate_dir_block");
2126
2127         /*
2128          * Finally, update the block pointers for the inode
2129          */
2130         db->blk = blk;
2131         pctx->errcode = ext2fs_bmap2(fs, db->ino, &inode, 0, BMAP_SET,
2132                                      db->blockcnt, 0, &blk);
2133         if (pctx->errcode) {
2134                 pctx->str = "ext2fs_block_iterate";
2135                 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
2136                 return 1;
2137         }
2138
2139         return 0;
2140 }