e2fsck/pass1.c

   1 /*
   2  * pass1.c -- pass #1 of e2fsck: sequential scan of the inode table
   3  *
   4  * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Public
   8  * License.
   9  * %End-Header%
  10  *
  11  * Pass 1 of e2fsck iterates over all the inodes in the filesystems,
  12  * and applies the following tests to each inode:
  13  *
  14  *      - The mode field of the inode must be legal.
  15  *      - The size and block count fields of the inode are correct.
  16  *      - A data block must not be used by another inode
  17  *
  18  * Pass 1 also gathers the collects the following information:
  19  *
  20  *      - A bitmap of which inodes are in use.          (inode_used_map)
  21  *      - A bitmap of which inodes are directories.     (inode_dir_map)
  22  *      - A bitmap of which inodes are regular files.   (inode_reg_map)
  23  *      - A bitmap of which inodes have bad fields.     (inode_bad_map)
  24  *      - A bitmap of which inodes are in bad blocks.   (inode_bb_map)
  25  *      - A bitmap of which inodes are imagic inodes.   (inode_imagic_map)
  26  *      - A bitmap of which inodes are casefolded.      (inode_casefold_map)
  27  *      - A bitmap of which blocks are in use.          (block_found_map)
  28  *      - A bitmap of which blocks are in use by two inodes     (block_dup_map)
  29  *      - The data blocks of the directory inodes.      (dir_map)
  30  *      - Ref counts for ea_inodes.                     (ea_inode_refs)
  31  *      - The encryption policy ID of each encrypted inode. (encrypted_files)
  32  *
  33  * Pass 1 is designed to stash away enough information so that the
  34  * other passes should not need to read in the inode information
  35  * during the normal course of a filesystem check.  (Although if an
  36  * inconsistency is detected, other passes may need to read in an
  37  * inode to fix it.)
  38  *
  39  * Note that pass 1B will be invoked if there are any duplicate blocks
  40  * found.
  41  */
  42
  43 #define _GNU_SOURCE 1 /* get strnlen() */
  44 #include "config.h"
  45 #include <string.h>
  46 #include <time.h>
  47 #ifdef HAVE_ERRNO_H
  48 #include <errno.h>
  49 #endif
  50
  51 #include "e2fsck.h"
  52 #include <ext2fs/ext2_ext_attr.h>
  53 #include <e2p/e2p.h>
  54
  55 #include "problem.h"
  56
  57 #ifdef NO_INLINE_FUNCS
  58 #define _INLINE_
  59 #else
  60 #define _INLINE_ inline
  61 #endif
  62
  63 #undef DEBUG
  64
  65 struct ea_quota {
  66         blk64_t blocks;
  67         __u64 inodes;
  68 };
  69
  70 static int process_block(ext2_filsys fs, blk64_t        *blocknr,
  71                          e2_blkcnt_t blockcnt, blk64_t ref_blk,
  72                          int ref_offset, void *priv_data);
  73 static int process_bad_block(ext2_filsys fs, blk64_t *block_nr,
  74                              e2_blkcnt_t blockcnt, blk64_t ref_blk,
  75                              int ref_offset, void *priv_data);
  76 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
  77                          char *block_buf,
  78                          const struct ea_quota *ea_ibody_quota);
  79 static void mark_table_blocks(e2fsck_t ctx);
  80 static void alloc_bb_map(e2fsck_t ctx);
  81 static void alloc_imagic_map(e2fsck_t ctx);
  82 static void mark_inode_bad(e2fsck_t ctx, ext2_ino_t ino);
  83 static void add_casefolded_dir(e2fsck_t ctx, ext2_ino_t ino);
  84 static void handle_fs_bad_blocks(e2fsck_t ctx);
  85 static void process_inodes(e2fsck_t ctx, char *block_buf);
  86 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b);
  87 static errcode_t scan_callback(ext2_filsys fs, ext2_inode_scan scan,
  88                                   dgrp_t group, void * priv_data);
  89 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
  90                                     char *block_buf, int adjust_sign);
  91 /* static char *describe_illegal_block(ext2_filsys fs, blk64_t block); */
  92
  93 struct process_block_struct {
  94         ext2_ino_t      ino;
  95         unsigned        is_dir:1, is_reg:1, clear:1, suppress:1,
  96                                 fragmented:1, compressed:1, bbcheck:1,
  97                                 inode_modified:1;
  98         blk64_t         num_blocks;
  99         blk64_t         max_blocks;
 100         blk64_t         last_block;
 101         e2_blkcnt_t     last_init_lblock;
 102         e2_blkcnt_t     last_db_block;
 103         int             num_illegal_blocks;
 104         blk64_t         previous_block;
 105         struct ext2_inode *inode;
 106         struct problem_context *pctx;
 107         ext2fs_block_bitmap fs_meta_blocks;
 108         e2fsck_t        ctx;
 109         blk64_t         next_lblock;
 110         struct extent_tree_info eti;
 111 };
 112
 113 struct process_inode_block {
 114         ext2_ino_t ino;
 115         struct ea_quota ea_ibody_quota;
 116         struct ext2_inode_large inode;
 117 };
 118
 119 struct scan_callback_struct {
 120         e2fsck_t        ctx;
 121         char            *block_buf;
 122 };
 123
 124 /*
 125  * For the inodes to process list.
 126  */
 127 static struct process_inode_block *inodes_to_process;
 128 static int process_inode_count;
 129
 130 static __u64 ext2_max_sizes[EXT2_MAX_BLOCK_LOG_SIZE -
 131                             EXT2_MIN_BLOCK_LOG_SIZE + 1];
 132
 133 /*
 134  * Check to make sure a device inode is real.  Returns 1 if the device
 135  * checks out, 0 if not.
 136  *
 137  * Note: this routine is now also used to check FIFO's and Sockets,
 138  * since they have the same requirement; the i_block fields should be
 139  * zero.
 140  */
 141 int e2fsck_pass1_check_device_inode(ext2_filsys fs EXT2FS_ATTR((unused)),
 142                                     struct ext2_inode *inode)
 143 {
 144         int     i;
 145
 146         /*
 147          * If the index or extents flag is set, then this is a bogus
 148          * device/fifo/socket
 149          */
 150         if (inode->i_flags & (EXT2_INDEX_FL | EXT4_EXTENTS_FL))
 151                 return 0;
 152
 153         /*
 154          * We should be able to do the test below all the time, but
 155          * because the kernel doesn't forcibly clear the device
 156          * inode's additional i_block fields, there are some rare
 157          * occasions when a legitimate device inode will have non-zero
 158          * additional i_block fields.  So for now, we only complain
 159          * when the immutable flag is set, which should never happen
 160          * for devices.  (And that's when the problem is caused, since
 161          * you can't set or clear immutable flags for devices.)  Once
 162          * the kernel has been fixed we can change this...
 163          */
 164         if (inode->i_flags & (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)) {
 165                 for (i=4; i < EXT2_N_BLOCKS; i++)
 166                         if (inode->i_block[i])
 167                                 return 0;
 168         }
 169         return 1;
 170 }
 171
 172 /*
 173  * Check to make sure a symlink inode is real.  Returns 1 if the symlink
 174  * checks out, 0 if not.
 175  */
 176 int e2fsck_pass1_check_symlink(ext2_filsys fs, ext2_ino_t ino,
 177                                struct ext2_inode *inode, char *buf)
 178 {
 179         unsigned int buflen;
 180         unsigned int len;
 181
 182         if ((inode->i_size_high || inode->i_size == 0) ||
 183             (inode->i_flags & EXT2_INDEX_FL))
 184                 return 0;
 185
 186         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
 187                 size_t inline_size;
 188
 189                 if (inode->i_flags & EXT4_EXTENTS_FL)
 190                         return 0;
 191                 if (ext2fs_inline_data_size(fs, ino, &inline_size))
 192                         return 0;
 193                 if (inode->i_size != inline_size)
 194                         return 0;
 195
 196                 return 1;
 197         }
 198
 199         if (ext2fs_is_fast_symlink(inode)) {
 200                 if (inode->i_flags & EXT4_EXTENTS_FL)
 201                         return 0;
 202                 buf = (char *)inode->i_block;
 203                 buflen = sizeof(inode->i_block);
 204         } else {
 205                 ext2_extent_handle_t    handle;
 206                 struct ext2_extent_info info;
 207                 struct ext2fs_extent    extent;
 208                 blk64_t blk;
 209                 int i;
 210
 211                 if (inode->i_flags & EXT4_EXTENTS_FL) {
 212                         if (ext2fs_extent_open2(fs, ino, inode, &handle))
 213                                 return 0;
 214                         if (ext2fs_extent_get_info(handle, &info) ||
 215                             (info.num_entries != 1) ||
 216                             (info.max_depth != 0)) {
 217                                 ext2fs_extent_free(handle);
 218                                 return 0;
 219                         }
 220                         if (ext2fs_extent_get(handle, EXT2_EXTENT_ROOT,
 221                                               &extent) ||
 222                             (extent.e_lblk != 0) ||
 223                             (extent.e_len != 1)) {
 224                                 ext2fs_extent_free(handle);
 225                                 return 0;
 226                         }
 227                         blk = extent.e_pblk;
 228                         ext2fs_extent_free(handle);
 229                 } else {
 230                         blk = inode->i_block[0];
 231
 232                         for (i = 1; i < EXT2_N_BLOCKS; i++)
 233                                 if (inode->i_block[i])
 234                                         return 0;
 235                 }
 236
 237                 if (blk < fs->super->s_first_data_block ||
 238                     blk >= ext2fs_blocks_count(fs->super))
 239                         return 0;
 240
 241                 if (io_channel_read_blk64(fs->io, blk, 1, buf))
 242                         return 0;
 243
 244                 buflen = fs->blocksize;
 245         }
 246
 247         if (inode->i_flags & EXT4_ENCRYPT_FL)
 248                 len = ext2fs_le16_to_cpu(*(__u16 *)buf) + 2;
 249         else
 250                 len = strnlen(buf, buflen);
 251
 252         if (len >= buflen)
 253                 return 0;
 254
 255         if (len != inode->i_size)
 256                 return 0;
 257         return 1;
 258 }
 259
 260 /*
 261  * If the extents or inlinedata flags are set on the inode, offer to clear 'em.
 262  */
 263 #define BAD_SPECIAL_FLAGS (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)
 264 static void check_extents_inlinedata(e2fsck_t ctx,
 265                                      struct problem_context *pctx)
 266 {
 267         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 268                 return;
 269
 270         if (!fix_problem(ctx, PR_1_SPECIAL_EXTENTS_IDATA, pctx))
 271                 return;
 272
 273         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 274         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 275 }
 276 #undef BAD_SPECIAL_FLAGS
 277
 278 /*
 279  * If the immutable (or append-only) flag is set on the inode, offer
 280  * to clear it.
 281  */
 282 #define BAD_SPECIAL_FLAGS (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)
 283 static void check_immutable(e2fsck_t ctx, struct problem_context *pctx)
 284 {
 285         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 286                 return;
 287
 288         if (!fix_problem(ctx, PR_1_SET_IMMUTABLE, pctx))
 289                 return;
 290
 291         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 292         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 293 }
 294
 295 /*
 296  * If device, fifo or socket, check size is zero -- if not offer to
 297  * clear it
 298  */
 299 static void check_size(e2fsck_t ctx, struct problem_context *pctx)
 300 {
 301         struct ext2_inode *inode = pctx->inode;
 302
 303         if (EXT2_I_SIZE(inode) == 0)
 304                 return;
 305
 306         if (!fix_problem(ctx, PR_1_SET_NONZSIZE, pctx))
 307                 return;
 308
 309         ext2fs_inode_size_set(ctx->fs, inode, 0);
 310         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 311 }
 312
 313 /*
 314  * For a given size, calculate how many blocks would be charged towards quota.
 315  */
 316 static blk64_t size_to_quota_blocks(ext2_filsys fs, size_t size)
 317 {
 318         blk64_t clusters;
 319
 320         clusters = DIV_ROUND_UP(size, fs->blocksize << fs->cluster_ratio_bits);
 321         return EXT2FS_C2B(fs, clusters);
 322 }
 323
 324 /*
 325  * Check validity of EA inode. Return 0 if EA inode is valid, otherwise return
 326  * the problem code.
 327  */
 328 static problem_t check_large_ea_inode(e2fsck_t ctx,
 329                                       struct ext2_ext_attr_entry *entry,
 330                                       struct problem_context *pctx,
 331                                       blk64_t *quota_blocks)
 332 {
 333         struct ext2_inode inode;
 334         __u32 hash, signed_hash;
 335         errcode_t retval;
 336
 337         /* Check if inode is within valid range */
 338         if ((entry->e_value_inum < EXT2_FIRST_INODE(ctx->fs->super)) ||
 339             (entry->e_value_inum > ctx->fs->super->s_inodes_count)) {
 340                 pctx->num = entry->e_value_inum;
 341                 return PR_1_ATTR_VALUE_EA_INODE;
 342         }
 343
 344         e2fsck_read_inode(ctx, entry->e_value_inum, &inode, "pass1");
 345
 346         retval = ext2fs_ext_attr_hash_entry3(ctx->fs, entry, NULL, &hash,
 347                                              &signed_hash);
 348         if (retval) {
 349                 com_err("check_large_ea_inode", retval,
 350                         _("while hashing entry with e_value_inum = %u"),
 351                         entry->e_value_inum);
 352                 fatal_error(ctx, 0);
 353         }
 354
 355         if ((hash == entry->e_hash) || (signed_hash == entry->e_hash)) {
 356                 *quota_blocks = size_to_quota_blocks(ctx->fs,
 357                                                      entry->e_value_size);
 358         } else {
 359                 /* This might be an old Lustre-style ea_inode reference. */
 360                 if (inode.i_mtime == pctx->ino &&
 361                     inode.i_generation == pctx->inode->i_generation) {
 362                         *quota_blocks = 0;
 363                 } else {
 364                         /* If target inode is also missing EA_INODE flag,
 365                          * this is likely to be a bad reference.
 366                          */
 367                         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 368                                 pctx->num = entry->e_value_inum;
 369                                 return PR_1_ATTR_VALUE_EA_INODE;
 370                         } else {
 371                                 pctx->num = entry->e_hash;
 372                                 return PR_1_ATTR_HASH;
 373                         }
 374                 }
 375         }
 376
 377         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 378                 pctx->num = entry->e_value_inum;
 379                 if (fix_problem(ctx, PR_1_ATTR_SET_EA_INODE_FL, pctx)) {
 380                         inode.i_flags |= EXT4_EA_INODE_FL;
 381                         ext2fs_write_inode(ctx->fs, entry->e_value_inum,
 382                                            &inode);
 383                 } else {
 384                         return PR_1_ATTR_NO_EA_INODE_FL;
 385                 }
 386         }
 387         return 0;
 388 }
 389
 390 static void inc_ea_inode_refs(e2fsck_t ctx, struct problem_context *pctx,
 391                               struct ext2_ext_attr_entry *first, void *end)
 392 {
 393         struct ext2_ext_attr_entry *entry = first;
 394         struct ext2_ext_attr_entry *np = EXT2_EXT_ATTR_NEXT(entry);
 395
 396         while ((void *) entry < end && (void *) np < end &&
 397                !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 398                 if (!entry->e_value_inum)
 399                         goto next;
 400                 if (!ctx->ea_inode_refs) {
 401                         pctx->errcode = ea_refcount_create(0,
 402                                                            &ctx->ea_inode_refs);
 403                         if (pctx->errcode) {
 404                                 pctx->num = 4;
 405                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
 406                                 ctx->flags |= E2F_FLAG_ABORT;
 407                                 return;
 408                         }
 409                 }
 410                 ea_refcount_increment(ctx->ea_inode_refs, entry->e_value_inum,
 411                                       0);
 412         next:
 413                 entry = np;
 414                 np = EXT2_EXT_ATTR_NEXT(entry);
 415         }
 416 }
 417
 418 static void check_ea_in_inode(e2fsck_t ctx, struct problem_context *pctx,
 419                               struct ea_quota *ea_ibody_quota)
 420 {
 421         struct ext2_super_block *sb = ctx->fs->super;
 422         struct ext2_inode_large *inode;
 423         struct ext2_ext_attr_entry *entry;
 424         char *start, *header, *end;
 425         unsigned int storage_size, remain;
 426         problem_t problem = 0;
 427         region_t region = 0;
 428
 429         ea_ibody_quota->blocks = 0;
 430         ea_ibody_quota->inodes = 0;
 431
 432         inode = (struct ext2_inode_large *) pctx->inode;
 433         storage_size = EXT2_INODE_SIZE(ctx->fs->super) - EXT2_GOOD_OLD_INODE_SIZE -
 434                 inode->i_extra_isize;
 435         header = ((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 436                  inode->i_extra_isize;
 437         end = header + storage_size;
 438         start = header + sizeof(__u32);
 439         entry = (struct ext2_ext_attr_entry *) start;
 440
 441         /* scan all entry's headers first */
 442
 443         /* take finish entry 0UL into account */
 444         remain = storage_size - sizeof(__u32);
 445
 446         region = region_create(0, storage_size);
 447         if (!region) {
 448                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
 449                 problem = 0;
 450                 ctx->flags |= E2F_FLAG_ABORT;
 451                 return;
 452         }
 453         if (region_allocate(region, 0, sizeof(__u32))) {
 454                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 455                 goto fix;
 456         }
 457
 458         while (remain >= sizeof(struct ext2_ext_attr_entry) &&
 459                !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 460                 __u32 hash;
 461
 462                 if (region_allocate(region, (char *)entry - (char *)header,
 463                                     EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
 464                         problem = PR_1_INODE_EA_ALLOC_COLLISION;
 465                         goto fix;
 466                 }
 467
 468                 /* header eats this space */
 469                 remain -= sizeof(struct ext2_ext_attr_entry);
 470
 471                 /* is attribute name valid? */
 472                 if (EXT2_EXT_ATTR_SIZE(entry->e_name_len) > remain) {
 473                         pctx->num = entry->e_name_len;
 474                         problem = PR_1_ATTR_NAME_LEN;
 475                         goto fix;
 476                 }
 477
 478                 /* attribute len eats this space */
 479                 remain -= EXT2_EXT_ATTR_SIZE(entry->e_name_len);
 480
 481                 if (entry->e_value_inum == 0) {
 482                         /* check value size */
 483                         if (entry->e_value_size > remain) {
 484                                 pctx->num = entry->e_value_size;
 485                                 problem = PR_1_ATTR_VALUE_SIZE;
 486                                 goto fix;
 487                         }
 488
 489                         if (entry->e_value_size &&
 490                             region_allocate(region,
 491                                             sizeof(__u32) + entry->e_value_offs,
 492                                             EXT2_EXT_ATTR_SIZE(
 493                                                 entry->e_value_size))) {
 494                                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 495                                 goto fix;
 496                         }
 497
 498                         hash = ext2fs_ext_attr_hash_entry(entry,
 499                                                 start + entry->e_value_offs);
 500                         if (entry->e_hash != 0 && entry->e_hash != hash)
 501                                 hash = ext2fs_ext_attr_hash_entry_signed(entry,
 502                                                 start + entry->e_value_offs);
 503
 504                         /* e_hash may be 0 in older inode's ea */
 505                         if (entry->e_hash != 0 && entry->e_hash != hash) {
 506                                 pctx->num = entry->e_hash;
 507                                 problem = PR_1_ATTR_HASH;
 508                                 goto fix;
 509                         }
 510                 } else {
 511                         blk64_t quota_blocks;
 512
 513                         problem = check_large_ea_inode(ctx, entry, pctx,
 514                                                        &quota_blocks);
 515                         if (problem != 0)
 516                                 goto fix;
 517
 518                         ea_ibody_quota->blocks += quota_blocks;
 519                         ea_ibody_quota->inodes++;
 520                 }
 521
 522                 /* If EA value is stored in external inode then it does not
 523                  * consume space here */
 524                 if (entry->e_value_inum == 0)
 525                         remain -= entry->e_value_size;
 526
 527                 entry = EXT2_EXT_ATTR_NEXT(entry);
 528         }
 529
 530         if (region_allocate(region, (char *)entry - (char *)header,
 531                             sizeof(__u32))) {
 532                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 533                 goto fix;
 534         }
 535 fix:
 536         if (region)
 537                 region_free(region);
 538         /*
 539          * it seems like a corruption. it's very unlikely we could repair
 540          * EA(s) in automatic fashion -bzzz
 541          */
 542         if (problem == 0 || !fix_problem(ctx, problem, pctx)) {
 543                 inc_ea_inode_refs(ctx, pctx,
 544                                   (struct ext2_ext_attr_entry *)start, end);
 545                 return;
 546         }
 547
 548         /* simply remove all possible EA(s) */
 549         *((__u32 *)header) = 0UL;
 550         e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 551                                 EXT2_INODE_SIZE(sb), "pass1");
 552         ea_ibody_quota->blocks = 0;
 553         ea_ibody_quota->inodes = 0;
 554 }
 555
 556 static int check_inode_extra_negative_epoch(__u32 xtime, __u32 extra) {
 557         return (xtime & (1U << 31)) != 0 &&
 558                 (extra & EXT4_EPOCH_MASK) == EXT4_EPOCH_MASK;
 559 }
 560
 561 #define CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, xtime) \
 562         check_inode_extra_negative_epoch(inode->i_##xtime, \
 563                                          inode->i_##xtime##_extra)
 564
 565 /* When today's date is earlier than 2242, we assume that atimes,
 566  * ctimes, crtimes, and mtimes with years in the range 2310..2378 are
 567  * actually pre-1970 dates mis-encoded.
 568  */
 569 #define EXT4_EXTRA_NEGATIVE_DATE_CUTOFF 2 * (1LL << 32)
 570
 571 static void check_inode_extra_space(e2fsck_t ctx, struct problem_context *pctx,
 572                                     struct ea_quota *ea_ibody_quota)
 573 {
 574         struct ext2_super_block *sb = ctx->fs->super;
 575         struct ext2_inode_large *inode;
 576         __u32 *eamagic;
 577         int min, max;
 578
 579         ea_ibody_quota->blocks = 0;
 580         ea_ibody_quota->inodes = 0;
 581
 582         inode = (struct ext2_inode_large *) pctx->inode;
 583         if (EXT2_INODE_SIZE(sb) == EXT2_GOOD_OLD_INODE_SIZE) {
 584                 /* this isn't large inode. so, nothing to check */
 585                 return;
 586         }
 587
 588 #if 0
 589         printf("inode #%u, i_extra_size %d\n", pctx->ino,
 590                         inode->i_extra_isize);
 591 #endif
 592         /* i_extra_isize must cover i_extra_isize + i_checksum_hi at least */
 593         min = sizeof(inode->i_extra_isize) + sizeof(inode->i_checksum_hi);
 594         max = EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE;
 595         /*
 596          * For now we will allow i_extra_isize to be 0, but really
 597          * implementations should never allow i_extra_isize to be 0
 598          */
 599         if (inode->i_extra_isize &&
 600             (inode->i_extra_isize < min || inode->i_extra_isize > max ||
 601              inode->i_extra_isize & 3)) {
 602                 if (!fix_problem(ctx, PR_1_EXTRA_ISIZE, pctx))
 603                         return;
 604                 if (inode->i_extra_isize < min || inode->i_extra_isize > max)
 605                         inode->i_extra_isize = sb->s_want_extra_isize;
 606                 else
 607                         inode->i_extra_isize = (inode->i_extra_isize + 3) & ~3;
 608                 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 609                                         EXT2_INODE_SIZE(sb), "pass1");
 610         }
 611
 612         /* check if there is no place for an EA header */
 613         if (inode->i_extra_isize >= max - sizeof(__u32))
 614                 return;
 615
 616         eamagic = (__u32 *) (((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 617                         inode->i_extra_isize);
 618         if (*eamagic == EXT2_EXT_ATTR_MAGIC) {
 619                 /* it seems inode has an extended attribute(s) in body */
 620                 check_ea_in_inode(ctx, pctx, ea_ibody_quota);
 621         }
 622
 623         /*
 624          * If the inode's extended atime (ctime, crtime, mtime) is stored in
 625          * the old, invalid format, repair it.
 626          */
 627         if (((sizeof(time_t) <= 4) ||
 628              (((sizeof(time_t) > 4) &&
 629                ctx->now < EXT4_EXTRA_NEGATIVE_DATE_CUTOFF))) &&
 630             (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime) ||
 631              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime) ||
 632              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime) ||
 633              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))) {
 634
 635                 if (!fix_problem(ctx, PR_1_EA_TIME_OUT_OF_RANGE, pctx))
 636                         return;
 637
 638                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime))
 639                         inode->i_atime_extra &= ~EXT4_EPOCH_MASK;
 640                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime))
 641                         inode->i_ctime_extra &= ~EXT4_EPOCH_MASK;
 642                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime))
 643                         inode->i_crtime_extra &= ~EXT4_EPOCH_MASK;
 644                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))
 645                         inode->i_mtime_extra &= ~EXT4_EPOCH_MASK;
 646                 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 647                                         EXT2_INODE_SIZE(sb), "pass1");
 648         }
 649
 650 }
 651
 652 /*
 653  * Check to see if the inode might really be a directory, despite i_mode
 654  *
 655  * This is a lot of complexity for something for which I'm not really
 656  * convinced happens frequently in the wild.  If for any reason this
 657  * causes any problems, take this code out.
 658  * [tytso:20070331.0827EDT]
 659  */
 660 static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx,
 661                                 char *buf)
 662 {
 663         struct ext2_inode *inode = pctx->inode;
 664         struct ext2_dir_entry   *dirent;
 665         errcode_t               retval;
 666         blk64_t                 blk;
 667         unsigned int            i, rec_len, not_device = 0;
 668         int                     extent_fs;
 669         int                     inlinedata_fs;
 670
 671         /*
 672          * If the mode looks OK, we believe it.  If the first block in
 673          * the i_block array is 0, this cannot be a directory. If the
 674          * inode is extent-mapped, it is still the case that the latter
 675          * cannot be 0 - the magic number in the extent header would make
 676          * it nonzero.
 677          */
 678         if (LINUX_S_ISDIR(inode->i_mode) || LINUX_S_ISREG(inode->i_mode) ||
 679             LINUX_S_ISLNK(inode->i_mode) || inode->i_block[0] == 0)
 680                 return;
 681
 682         /*
 683          * Check the block numbers in the i_block array for validity:
 684          * zero blocks are skipped (but the first one cannot be zero -
 685          * see above), other blocks are checked against the first and
 686          * max data blocks (from the the superblock) and against the
 687          * block bitmap. Any invalid block found means this cannot be
 688          * a directory.
 689          *
 690          * If there are non-zero blocks past the fourth entry, then
 691          * this cannot be a device file: we remember that for the next
 692          * check.
 693          *
 694          * For extent mapped files, we don't do any sanity checking:
 695          * just try to get the phys block of logical block 0 and run
 696          * with it.
 697          *
 698          * For inline data files, we just try to get the size of inline
 699          * data.  If it's true, we will treat it as a directory.
 700          */
 701
 702         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
 703         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
 704         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL)) {
 705                 size_t size;
 706                 __u32 dotdot;
 707                 unsigned int rec_len2;
 708                 struct ext2_dir_entry de;
 709
 710                 if (ext2fs_inline_data_size(ctx->fs, pctx->ino, &size))
 711                         return;
 712                 /*
 713                  * If the size isn't a multiple of 4, it's probably not a
 714                  * directory??
 715                  */
 716                 if (size & 3)
 717                         return;
 718                 /*
 719                  * If the first 10 bytes don't look like a directory entry,
 720                  * it's probably not a directory.
 721                  */
 722                 memcpy(&dotdot, inode->i_block, sizeof(dotdot));
 723                 memcpy(&de, ((char *)inode->i_block) + EXT4_INLINE_DATA_DOTDOT_SIZE,
 724                        EXT2_DIR_REC_LEN(0));
 725                 dotdot = ext2fs_le32_to_cpu(dotdot);
 726                 de.inode = ext2fs_le32_to_cpu(de.inode);
 727                 de.rec_len = ext2fs_le16_to_cpu(de.rec_len);
 728                 ext2fs_get_rec_len(ctx->fs, &de, &rec_len2);
 729                 if (dotdot >= ctx->fs->super->s_inodes_count ||
 730                     (dotdot < EXT2_FIRST_INO(ctx->fs->super) &&
 731                      dotdot != EXT2_ROOT_INO) ||
 732                     de.inode >= ctx->fs->super->s_inodes_count ||
 733                     (de.inode < EXT2_FIRST_INO(ctx->fs->super) &&
 734                      de.inode != 0) ||
 735                     rec_len2 > EXT4_MIN_INLINE_DATA_SIZE -
 736                               EXT4_INLINE_DATA_DOTDOT_SIZE)
 737                         return;
 738                 /* device files never have a "system.data" entry */
 739                 goto isdir;
 740         } else if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) {
 741                 /* extent mapped */
 742                 if  (ext2fs_bmap2(ctx->fs, pctx->ino, inode, 0, 0, 0, 0,
 743                                  &blk))
 744                         return;
 745                 /* device files are never extent mapped */
 746                 not_device++;
 747         } else {
 748                 for (i=0; i < EXT2_N_BLOCKS; i++) {
 749                         blk = inode->i_block[i];
 750                         if (!blk)
 751                                 continue;
 752                         if (i >= 4)
 753                                 not_device++;
 754
 755                         if (blk < ctx->fs->super->s_first_data_block ||
 756                             blk >= ext2fs_blocks_count(ctx->fs->super) ||
 757                             ext2fs_fast_test_block_bitmap2(ctx->block_found_map,
 758                                                            blk))
 759                                 return; /* Invalid block, can't be dir */
 760                 }
 761                 blk = inode->i_block[0];
 762         }
 763
 764         /*
 765          * If the mode says this is a device file and the i_links_count field
 766          * is sane and we have not ruled it out as a device file previously,
 767          * we declare it a device file, not a directory.
 768          */
 769         if ((LINUX_S_ISCHR(inode->i_mode) || LINUX_S_ISBLK(inode->i_mode)) &&
 770             (inode->i_links_count == 1) && !not_device)
 771                 return;
 772
 773         /* read the first block */
 774         ehandler_operation(_("reading directory block"));
 775         retval = ext2fs_read_dir_block4(ctx->fs, blk, buf, 0, pctx->ino);
 776         ehandler_operation(0);
 777         if (retval)
 778                 return;
 779
 780         dirent = (struct ext2_dir_entry *) buf;
 781         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 782         if (retval)
 783                 return;
 784         if ((ext2fs_dirent_name_len(dirent) != 1) ||
 785             (dirent->name[0] != '.') ||
 786             (dirent->inode != pctx->ino) ||
 787             (rec_len < 12) ||
 788             (rec_len % 4) ||
 789             (rec_len >= ctx->fs->blocksize - 12))
 790                 return;
 791
 792         dirent = (struct ext2_dir_entry *) (buf + rec_len);
 793         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 794         if (retval)
 795                 return;
 796         if ((ext2fs_dirent_name_len(dirent) != 2) ||
 797             (dirent->name[0] != '.') ||
 798             (dirent->name[1] != '.') ||
 799             (rec_len < 12) ||
 800             (rec_len % 4))
 801                 return;
 802
 803 isdir:
 804         if (fix_problem(ctx, PR_1_TREAT_AS_DIRECTORY, pctx)) {
 805                 inode->i_mode = (inode->i_mode & 07777) | LINUX_S_IFDIR;
 806                 e2fsck_write_inode_full(ctx, pctx->ino, inode,
 807                                         EXT2_INODE_SIZE(ctx->fs->super),
 808                                         "check_is_really_dir");
 809         }
 810 }
 811
 812 extern errcode_t e2fsck_setup_icount(e2fsck_t ctx, const char *icount_name,
 813                                      int flags, ext2_icount_t hint,
 814                                      ext2_icount_t *ret)
 815 {
 816         unsigned int            threshold;
 817         unsigned int            save_type;
 818         ext2_ino_t              num_dirs;
 819         errcode_t               retval;
 820         char                    *tdb_dir;
 821         int                     enable;
 822
 823         *ret = 0;
 824
 825         profile_get_string(ctx->profile, "scratch_files", "directory", 0, 0,
 826                            &tdb_dir);
 827         profile_get_uint(ctx->profile, "scratch_files",
 828                          "numdirs_threshold", 0, 0, &threshold);
 829         profile_get_boolean(ctx->profile, "scratch_files",
 830                             "icount", 0, 1, &enable);
 831
 832         retval = ext2fs_get_num_dirs(ctx->fs, &num_dirs);
 833         if (retval)
 834                 num_dirs = 1024;        /* Guess */
 835
 836         if (enable && tdb_dir && !access(tdb_dir, W_OK) &&
 837             (!threshold || num_dirs > threshold)) {
 838                 retval = ext2fs_create_icount_tdb(ctx->fs, tdb_dir,
 839                                                   flags, ret);
 840                 if (retval == 0)
 841                         return 0;
 842         }
 843         e2fsck_set_bitmap_type(ctx->fs, EXT2FS_BMAP64_RBTREE, icount_name,
 844                                &save_type);
 845         if (ctx->options & E2F_OPT_ICOUNT_FULLMAP)
 846                 flags |= EXT2_ICOUNT_OPT_FULLMAP;
 847         retval = ext2fs_create_icount2(ctx->fs, flags, 0, hint, ret);
 848         ctx->fs->default_bitmap_type = save_type;
 849         return retval;
 850 }
 851
 852 static errcode_t recheck_bad_inode_checksum(ext2_filsys fs, ext2_ino_t ino,
 853                                             e2fsck_t ctx,
 854                                             struct problem_context *pctx)
 855 {
 856         errcode_t retval;
 857         struct ext2_inode_large inode;
 858
 859         /*
 860          * Reread inode.  If we don't see checksum error, then this inode
 861          * has been fixed elsewhere.
 862          */
 863         ctx->stashed_ino = 0;
 864         retval = ext2fs_read_inode_full(fs, ino, (struct ext2_inode *)&inode,
 865                                         sizeof(inode));
 866         if (retval && retval != EXT2_ET_INODE_CSUM_INVALID)
 867                 return retval;
 868         if (!retval)
 869                 return 0;
 870
 871         /*
 872          * Checksum still doesn't match.  That implies that the inode passes
 873          * all the sanity checks, so maybe the checksum is simply corrupt.
 874          * See if the user will go for fixing that.
 875          */
 876         if (!fix_problem(ctx, PR_1_INODE_ONLY_CSUM_INVALID, pctx))
 877                 return 0;
 878
 879         retval = ext2fs_write_inode_full(fs, ino, (struct ext2_inode *)&inode,
 880                                          sizeof(inode));
 881         return retval;
 882 }
 883
 884 static void reserve_block_for_root_repair(e2fsck_t ctx)
 885 {
 886         blk64_t         blk = 0;
 887         errcode_t       err;
 888         ext2_filsys     fs = ctx->fs;
 889
 890         ctx->root_repair_block = 0;
 891         if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO))
 892                 return;
 893
 894         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 895         if (err)
 896                 return;
 897         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 898         ctx->root_repair_block = blk;
 899 }
 900
 901 static void reserve_block_for_lnf_repair(e2fsck_t ctx)
 902 {
 903         blk64_t         blk = 0;
 904         errcode_t       err;
 905         ext2_filsys     fs = ctx->fs;
 906         static const char name[] = "lost+found";
 907         ext2_ino_t      ino;
 908
 909         ctx->lnf_repair_block = 0;
 910         if (!ext2fs_lookup(fs, EXT2_ROOT_INO, name, sizeof(name)-1, 0, &ino))
 911                 return;
 912
 913         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 914         if (err)
 915                 return;
 916         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 917         ctx->lnf_repair_block = blk;
 918 }
 919
 920 static errcode_t get_inline_data_ea_size(ext2_filsys fs, ext2_ino_t ino,
 921                                          struct ext2_inode *inode,
 922                                          size_t *sz)
 923 {
 924         void *p;
 925         struct ext2_xattr_handle *handle;
 926         errcode_t retval;
 927
 928         retval = ext2fs_xattrs_open(fs, ino, &handle);
 929         if (retval)
 930                 return retval;
 931
 932         retval = ext2fs_xattrs_read_inode(handle,
 933                                           (struct ext2_inode_large *)inode);
 934         if (retval)
 935                 goto err;
 936
 937         retval = ext2fs_xattr_get(handle, "system.data", &p, sz);
 938         if (retval)
 939                 goto err;
 940         ext2fs_free_mem(&p);
 941 err:
 942         (void) ext2fs_xattrs_close(&handle);
 943         return retval;
 944 }
 945
 946 static void finish_processing_inode(e2fsck_t ctx, ext2_ino_t ino,
 947                                     struct problem_context *pctx,
 948                                     int failed_csum)
 949 {
 950         if (!failed_csum)
 951                 return;
 952
 953         /*
 954          * If the inode failed the checksum and the user didn't
 955          * clear the inode, test the checksum again -- if it still
 956          * fails, ask the user if the checksum should be corrected.
 957          */
 958         pctx->errcode = recheck_bad_inode_checksum(ctx->fs, ino, ctx, pctx);
 959         if (pctx->errcode)
 960                 ctx->flags |= E2F_FLAG_ABORT;
 961 }
 962 #define FINISH_INODE_LOOP(ctx, ino, pctx, failed_csum) \
 963         do { \
 964                 finish_processing_inode((ctx), (ino), (pctx), (failed_csum)); \
 965                 if ((ctx)->flags & E2F_FLAG_ABORT) \
 966                         return; \
 967         } while (0)
 968
 969 static int could_be_block_map(ext2_filsys fs, struct ext2_inode *inode)
 970 {
 971         __u32 x;
 972         int i;
 973
 974         for (i = 0; i < EXT2_N_BLOCKS; i++) {
 975                 x = inode->i_block[i];
 976 #ifdef WORDS_BIGENDIAN
 977                 x = ext2fs_swab32(x);
 978 #endif
 979                 if (x >= ext2fs_blocks_count(fs->super))
 980                         return 0;
 981         }
 982
 983         return 1;
 984 }
 985
 986 /*
 987  * Figure out what to do with an inode that has both extents and inline data
 988  * inode flags set.  Returns -1 if we decide to erase the inode, 0 otherwise.
 989  */
 990 static int fix_inline_data_extents_file(e2fsck_t ctx,
 991                                         ext2_ino_t ino,
 992                                         struct ext2_inode *inode,
 993                                         int inode_size,
 994                                         struct problem_context *pctx)
 995 {
 996         size_t max_inline_ea_size;
 997         ext2_filsys fs = ctx->fs;
 998         int dirty = 0;
 999
1000         /* Both feature flags not set?  Just run the regular checks */
1001         if (!ext2fs_has_feature_extents(fs->super) &&
1002             !ext2fs_has_feature_inline_data(fs->super))
1003                 return 0;
1004
1005         /* Clear both flags if it's a special file */
1006         if (LINUX_S_ISCHR(inode->i_mode) ||
1007             LINUX_S_ISBLK(inode->i_mode) ||
1008             LINUX_S_ISFIFO(inode->i_mode) ||
1009             LINUX_S_ISSOCK(inode->i_mode)) {
1010                 check_extents_inlinedata(ctx, pctx);
1011                 return 0;
1012         }
1013
1014         /* If it looks like an extent tree, try to clear inlinedata */
1015         if (ext2fs_extent_header_verify(inode->i_block,
1016                                  sizeof(inode->i_block)) == 0 &&
1017             fix_problem(ctx, PR_1_CLEAR_INLINE_DATA_FOR_EXTENT, pctx)) {
1018                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1019                 dirty = 1;
1020                 goto out;
1021         }
1022
1023         /* If it looks short enough to be inline data, try to clear extents */
1024         if (inode_size > EXT2_GOOD_OLD_INODE_SIZE)
1025                 max_inline_ea_size = inode_size -
1026                                      (EXT2_GOOD_OLD_INODE_SIZE +
1027                                       ((struct ext2_inode_large *)inode)->i_extra_isize);
1028         else
1029                 max_inline_ea_size = 0;
1030         if (EXT2_I_SIZE(inode) <
1031             EXT4_MIN_INLINE_DATA_SIZE + max_inline_ea_size &&
1032             fix_problem(ctx, PR_1_CLEAR_EXTENT_FOR_INLINE_DATA, pctx)) {
1033                 inode->i_flags &= ~EXT4_EXTENTS_FL;
1034                 dirty = 1;
1035                 goto out;
1036         }
1037
1038         /*
1039          * Too big for inline data, but no evidence of extent tree -
1040          * maybe it's a block map file?  If the mappings all look valid?
1041          */
1042         if (could_be_block_map(fs, inode) &&
1043             fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_FLAGS, pctx)) {
1044 #ifdef WORDS_BIGENDIAN
1045                 int i;
1046
1047                 for (i = 0; i < EXT2_N_BLOCKS; i++)
1048                         inode->i_block[i] = ext2fs_swab32(inode->i_block[i]);
1049 #endif
1050
1051                 inode->i_flags &= ~(EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL);
1052                 dirty = 1;
1053                 goto out;
1054         }
1055
1056         /* Oh well, just clear the busted inode. */
1057         if (fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_INODE, pctx)) {
1058                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1059                 return -1;
1060         }
1061
1062 out:
1063         if (dirty)
1064                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1065
1066         return 0;
1067 }
1068
1069 static void pass1_readahead(e2fsck_t ctx, dgrp_t *group, ext2_ino_t *next_ino)
1070 {
1071         ext2_ino_t inodes_in_group = 0, inodes_per_block, inodes_per_buffer;
1072         dgrp_t start = *group, grp;
1073         blk64_t blocks_to_read = 0;
1074         errcode_t err = EXT2_ET_INVALID_ARGUMENT;
1075
1076         if (ctx->readahead_kb == 0)
1077                 goto out;
1078
1079         /* Keep iterating groups until we have enough to readahead */
1080         inodes_per_block = EXT2_INODES_PER_BLOCK(ctx->fs->super);
1081         for (grp = start; grp < ctx->fs->group_desc_count; grp++) {
1082                 if (ext2fs_bg_flags_test(ctx->fs, grp, EXT2_BG_INODE_UNINIT))
1083                         continue;
1084                 inodes_in_group = ctx->fs->super->s_inodes_per_group -
1085                                         ext2fs_bg_itable_unused(ctx->fs, grp);
1086                 blocks_to_read += (inodes_in_group + inodes_per_block - 1) /
1087                                         inodes_per_block;
1088                 if (blocks_to_read * ctx->fs->blocksize >
1089                     ctx->readahead_kb * 1024)
1090                         break;
1091         }
1092
1093         err = e2fsck_readahead(ctx->fs, E2FSCK_READA_ITABLE, start,
1094                                grp - start + 1);
1095         if (err == EAGAIN) {
1096                 ctx->readahead_kb /= 2;
1097                 err = 0;
1098         }
1099
1100 out:
1101         if (err) {
1102                 /* Error; disable itable readahead */
1103                 *group = ctx->fs->group_desc_count;
1104                 *next_ino = ctx->fs->super->s_inodes_count;
1105         } else {
1106                 /*
1107                  * Don't do more readahead until we've reached the first inode
1108                  * of the last inode scan buffer block for the last group.
1109                  */
1110                 *group = grp + 1;
1111                 inodes_per_buffer = (ctx->inode_buffer_blocks ?
1112                                      ctx->inode_buffer_blocks :
1113                                      EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS) *
1114                                     ctx->fs->blocksize /
1115                                     EXT2_INODE_SIZE(ctx->fs->super);
1116                 inodes_in_group--;
1117                 *next_ino = inodes_in_group -
1118                             (inodes_in_group % inodes_per_buffer) + 1 +
1119                             (grp * ctx->fs->super->s_inodes_per_group);
1120         }
1121 }
1122
1123 /*
1124  * Check if the passed ino is one of the used superblock quota inodes.
1125  *
1126  * Before the quota inodes were journaled, older superblock quota inodes
1127  * were just regular files in the filesystem and not reserved inodes.  This
1128  * checks if the passed ino is one of the s_*_quota_inum superblock fields,
1129  * which may not always be the same as the EXT4_*_QUOTA_INO fields.
1130  */
1131 static int quota_inum_is_super(struct ext2_super_block *sb, ext2_ino_t ino)
1132 {
1133         enum quota_type qtype;
1134
1135         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1136                 if (*quota_sb_inump(sb, qtype) == ino)
1137                         return 1;
1138
1139         return 0;
1140 }
1141
1142 /*
1143  * Check if the passed ino is one of the reserved quota inodes.
1144  * This checks if the inode number is one of the reserved EXT4_*_QUOTA_INO
1145  * inodes.  These inodes may or may not be in use by the quota feature.
1146  */
1147 static int quota_inum_is_reserved(ext2_filsys fs, ext2_ino_t ino)
1148 {
1149         enum quota_type qtype;
1150
1151         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1152                 if (quota_type2inum(qtype, fs->super) == ino)
1153                         return 1;
1154
1155         return 0;
1156 }
1157
1158 void e2fsck_pass1(e2fsck_t ctx)
1159 {
1160         int     i;
1161         __u64   max_sizes;
1162         ext2_filsys fs = ctx->fs;
1163         ext2_ino_t      ino = 0;
1164         struct ext2_inode *inode = NULL;
1165         ext2_inode_scan scan = NULL;
1166         char            *block_buf = NULL;
1167 #ifdef RESOURCE_TRACK
1168         struct resource_track   rtrack;
1169 #endif
1170         unsigned char   frag, fsize;
1171         struct          problem_context pctx;
1172         struct          scan_callback_struct scan_struct;
1173         struct ext2_super_block *sb = ctx->fs->super;
1174         const char      *old_op;
1175         const char      *eop_next_inode = _("getting next inode from scan");
1176         int             imagic_fs, extent_fs, inlinedata_fs, casefold_fs;
1177         int             low_dtime_check = 1;
1178         unsigned int    inode_size = EXT2_INODE_SIZE(fs->super);
1179         unsigned int    bufsize;
1180         int             failed_csum = 0;
1181         ext2_ino_t      ino_threshold = 0;
1182         dgrp_t          ra_group = 0;
1183         struct ea_quota ea_ibody_quota;
1184
1185         init_resource_track(&rtrack, ctx->fs->io);
1186         clear_problem_context(&pctx);
1187
1188         /* If we can do readahead, figure out how many groups to pull in. */
1189         if (!e2fsck_can_readahead(ctx->fs))
1190                 ctx->readahead_kb = 0;
1191         else if (ctx->readahead_kb == ~0ULL)
1192                 ctx->readahead_kb = e2fsck_guess_readahead(ctx->fs);
1193         pass1_readahead(ctx, &ra_group, &ino_threshold);
1194
1195         if (!(ctx->options & E2F_OPT_PREEN))
1196                 fix_problem(ctx, PR_1_PASS_HEADER, &pctx);
1197
1198         if (ext2fs_has_feature_dir_index(fs->super) &&
1199             !(ctx->options & E2F_OPT_NO)) {
1200                 if (ext2fs_u32_list_create(&ctx->dirs_to_hash, 50))
1201                         ctx->dirs_to_hash = 0;
1202         }
1203
1204 #ifdef MTRACE
1205         mtrace_print("Pass 1");
1206 #endif
1207
1208 #define EXT2_BPP(bits) (1ULL << ((bits) - 2))
1209
1210         for (i = EXT2_MIN_BLOCK_LOG_SIZE; i <= EXT2_MAX_BLOCK_LOG_SIZE; i++) {
1211                 max_sizes = EXT2_NDIR_BLOCKS + EXT2_BPP(i);
1212                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i);
1213                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i) * EXT2_BPP(i);
1214                 max_sizes = (max_sizes * (1UL << i));
1215                 ext2_max_sizes[i - EXT2_MIN_BLOCK_LOG_SIZE] = max_sizes;
1216         }
1217 #undef EXT2_BPP
1218
1219         imagic_fs = ext2fs_has_feature_imagic_inodes(sb);
1220         extent_fs = ext2fs_has_feature_extents(sb);
1221         inlinedata_fs = ext2fs_has_feature_inline_data(sb);
1222         casefold_fs = ext2fs_has_feature_casefold(sb);
1223
1224         /*
1225          * Allocate bitmaps structures
1226          */
1227         pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("in-use inode map"),
1228                                                     EXT2FS_BMAP64_RBTREE,
1229                                                     "inode_used_map",
1230                                                     &ctx->inode_used_map);
1231         if (pctx.errcode) {
1232                 pctx.num = 1;
1233                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1234                 ctx->flags |= E2F_FLAG_ABORT;
1235                 return;
1236         }
1237         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1238                         _("directory inode map"),
1239                         EXT2FS_BMAP64_AUTODIR,
1240                         "inode_dir_map", &ctx->inode_dir_map);
1241         if (pctx.errcode) {
1242                 pctx.num = 2;
1243                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1244                 ctx->flags |= E2F_FLAG_ABORT;
1245                 return;
1246         }
1247         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1248                         _("regular file inode map"), EXT2FS_BMAP64_RBTREE,
1249                         "inode_reg_map", &ctx->inode_reg_map);
1250         if (pctx.errcode) {
1251                 pctx.num = 6;
1252                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1253                 ctx->flags |= E2F_FLAG_ABORT;
1254                 return;
1255         }
1256         pctx.errcode = e2fsck_allocate_subcluster_bitmap(fs,
1257                         _("in-use block map"), EXT2FS_BMAP64_RBTREE,
1258                         "block_found_map", &ctx->block_found_map);
1259         if (pctx.errcode) {
1260                 pctx.num = 1;
1261                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1262                 ctx->flags |= E2F_FLAG_ABORT;
1263                 return;
1264         }
1265         pctx.errcode = e2fsck_allocate_block_bitmap(fs,
1266                         _("metadata block map"), EXT2FS_BMAP64_RBTREE,
1267                         "block_metadata_map", &ctx->block_metadata_map);
1268         if (pctx.errcode) {
1269                 pctx.num = 1;
1270                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1271                 ctx->flags |= E2F_FLAG_ABORT;
1272                 return;
1273         }
1274         if (casefold_fs) {
1275                 pctx.errcode =
1276                         e2fsck_allocate_inode_bitmap(fs,
1277                                                      _("inode casefold map"),
1278                                                      EXT2FS_BMAP64_RBTREE,
1279                                                      "inode_casefold_map",
1280                                                      &ctx->inode_casefold_map);
1281                 if (pctx.errcode) {
1282                         pctx.num = 1;
1283                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1284                         ctx->flags |= E2F_FLAG_ABORT;
1285                         return;
1286                 }
1287         }
1288         pctx.errcode = e2fsck_setup_icount(ctx, "inode_link_info", 0, NULL,
1289                                            &ctx->inode_link_info);
1290         if (pctx.errcode) {
1291                 fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
1292                 ctx->flags |= E2F_FLAG_ABORT;
1293                 return;
1294         }
1295         bufsize = inode_size;
1296         if (bufsize < sizeof(struct ext2_inode_large))
1297                 bufsize = sizeof(struct ext2_inode_large);
1298         inode = (struct ext2_inode *)
1299                 e2fsck_allocate_memory(ctx, bufsize, "scratch inode");
1300
1301         inodes_to_process = (struct process_inode_block *)
1302                 e2fsck_allocate_memory(ctx,
1303                                        (ctx->process_inode_size *
1304                                         sizeof(struct process_inode_block)),
1305                                        "array of inodes to process");
1306         process_inode_count = 0;
1307
1308         pctx.errcode = ext2fs_init_dblist(fs, 0);
1309         if (pctx.errcode) {
1310                 fix_problem(ctx, PR_1_ALLOCATE_DBCOUNT, &pctx);
1311                 ctx->flags |= E2F_FLAG_ABORT;
1312                 goto endit;
1313         }
1314
1315         /*
1316          * If the last orphan field is set, clear it, since the pass1
1317          * processing will automatically find and clear the orphans.
1318          * In the future, we may want to try using the last_orphan
1319          * linked list ourselves, but for now, we clear it so that the
1320          * ext3 mount code won't get confused.
1321          */
1322         if (!(ctx->options & E2F_OPT_READONLY)) {
1323                 if (fs->super->s_last_orphan) {
1324                         fs->super->s_last_orphan = 0;
1325                         ext2fs_mark_super_dirty(fs);
1326                 }
1327         }
1328
1329         mark_table_blocks(ctx);
1330         pctx.errcode = ext2fs_convert_subcluster_bitmap(fs,
1331                                                 &ctx->block_found_map);
1332         if (pctx.errcode) {
1333                 fix_problem(ctx, PR_1_CONVERT_SUBCLUSTER, &pctx);
1334                 ctx->flags |= E2F_FLAG_ABORT;
1335                 goto endit;
1336         }
1337         block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3,
1338                                                     "block iterate buffer");
1339         if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
1340                 e2fsck_use_inode_shortcuts(ctx, 1);
1341         e2fsck_intercept_block_allocations(ctx);
1342         old_op = ehandler_operation(_("opening inode scan"));
1343         pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks,
1344                                               &scan);
1345         ehandler_operation(old_op);
1346         if (pctx.errcode) {
1347                 fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1348                 ctx->flags |= E2F_FLAG_ABORT;
1349                 goto endit;
1350         }
1351         ext2fs_inode_scan_flags(scan, EXT2_SF_SKIP_MISSING_ITABLE |
1352                                       EXT2_SF_WARN_GARBAGE_INODES, 0);
1353         ctx->stashed_inode = inode;
1354         scan_struct.ctx = ctx;
1355         scan_struct.block_buf = block_buf;
1356         ext2fs_set_inode_callback(scan, scan_callback, &scan_struct);
1357         if (ctx->progress && ((ctx->progress)(ctx, 1, 0,
1358                                               ctx->fs->group_desc_count)))
1359                 goto endit;
1360         if ((fs->super->s_wtime &&
1361              fs->super->s_wtime < fs->super->s_inodes_count) ||
1362             (fs->super->s_mtime &&
1363              fs->super->s_mtime < fs->super->s_inodes_count) ||
1364             (fs->super->s_mkfs_time &&
1365              fs->super->s_mkfs_time < fs->super->s_inodes_count))
1366                 low_dtime_check = 0;
1367
1368         if (ext2fs_has_feature_mmp(fs->super) &&
1369             fs->super->s_mmp_block > fs->super->s_first_data_block &&
1370             fs->super->s_mmp_block < ext2fs_blocks_count(fs->super))
1371                 ext2fs_mark_block_bitmap2(ctx->block_found_map,
1372                                           fs->super->s_mmp_block);
1373
1374         /* Set up ctx->lost_and_found if possible */
1375         (void) e2fsck_get_lost_and_found(ctx, 0);
1376
1377         while (1) {
1378                 if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
1379                         if (e2fsck_mmp_update(fs))
1380                                 fatal_error(ctx, 0);
1381                 }
1382                 old_op = ehandler_operation(eop_next_inode);
1383                 pctx.errcode = ext2fs_get_next_inode_full(scan, &ino,
1384                                                           inode, inode_size);
1385                 if (ino > ino_threshold)
1386                         pass1_readahead(ctx, &ra_group, &ino_threshold);
1387                 ehandler_operation(old_op);
1388                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1389                         goto endit;
1390                 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) {
1391                         /*
1392                          * If badblocks says badblocks is bad, offer to clear
1393                          * the list, update the in-core bb list, and restart
1394                          * the inode scan.
1395                          */
1396                         if (ino == EXT2_BAD_INO &&
1397                             fix_problem(ctx, PR_1_BADBLOCKS_IN_BADBLOCKS,
1398                                         &pctx)) {
1399                                 errcode_t err;
1400
1401                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1402                                 ext2fs_badblocks_list_free(ctx->fs->badblocks);
1403                                 ctx->fs->badblocks = NULL;
1404                                 err = ext2fs_read_bb_inode(ctx->fs,
1405                                                         &ctx->fs->badblocks);
1406                                 if (err) {
1407                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1408                                                     &pctx);
1409                                         ctx->flags |= E2F_FLAG_ABORT;
1410                                 } else
1411                                         ctx->flags |= E2F_FLAG_RESTART;
1412                                 goto endit;
1413                         }
1414                         if (!ctx->inode_bb_map)
1415                                 alloc_bb_map(ctx);
1416                         ext2fs_mark_inode_bitmap2(ctx->inode_bb_map, ino);
1417                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1418                         continue;
1419                 }
1420                 if (pctx.errcode &&
1421                     pctx.errcode != EXT2_ET_INODE_CSUM_INVALID &&
1422                     pctx.errcode != EXT2_ET_INODE_IS_GARBAGE) {
1423                         fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1424                         ctx->flags |= E2F_FLAG_ABORT;
1425                         goto endit;
1426                 }
1427                 if (!ino)
1428                         break;
1429                 pctx.ino = ino;
1430                 pctx.inode = inode;
1431                 ctx->stashed_ino = ino;
1432
1433                 /* Clear trashed inode? */
1434                 if (pctx.errcode == EXT2_ET_INODE_IS_GARBAGE &&
1435                     inode->i_links_count > 0 &&
1436                     fix_problem(ctx, PR_1_INODE_IS_GARBAGE, &pctx)) {
1437                         pctx.errcode = 0;
1438                         e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1439                 }
1440                 failed_csum = pctx.errcode != 0;
1441
1442                 /*
1443                  * Check for inodes who might have been part of the
1444                  * orphaned list linked list.  They should have gotten
1445                  * dealt with by now, unless the list had somehow been
1446                  * corrupted.
1447                  *
1448                  * FIXME: In the future, inodes which are still in use
1449                  * (and which are therefore) pending truncation should
1450                  * be handled specially.  Right now we just clear the
1451                  * dtime field, and the normal e2fsck handling of
1452                  * inodes where i_size and the inode blocks are
1453                  * inconsistent is to fix i_size, instead of releasing
1454                  * the extra blocks.  This won't catch the inodes that
1455                  * was at the end of the orphan list, but it's better
1456                  * than nothing.  The right answer is that there
1457                  * shouldn't be any bugs in the orphan list handling.  :-)
1458                  */
1459                 if (inode->i_dtime && low_dtime_check &&
1460                     inode->i_dtime < ctx->fs->super->s_inodes_count) {
1461                         if (fix_problem(ctx, PR_1_LOW_DTIME, &pctx)) {
1462                                 inode->i_dtime = inode->i_links_count ?
1463                                         0 : ctx->now;
1464                                 e2fsck_write_inode(ctx, ino, inode,
1465                                                    "pass1");
1466                                 failed_csum = 0;
1467                         }
1468                 }
1469
1470                 if (inode->i_links_count) {
1471                         pctx.errcode = ext2fs_icount_store(ctx->inode_link_info,
1472                                            ino, inode->i_links_count);
1473                         if (pctx.errcode) {
1474                                 pctx.num = inode->i_links_count;
1475                                 fix_problem(ctx, PR_1_ICOUNT_STORE, &pctx);
1476                                 ctx->flags |= E2F_FLAG_ABORT;
1477                                 goto endit;
1478                         }
1479                 } else if ((ino >= EXT2_FIRST_INODE(fs->super)) &&
1480                            !quota_inum_is_reserved(fs, ino)) {
1481                         if (!inode->i_dtime && inode->i_mode) {
1482                                 if (fix_problem(ctx,
1483                                             PR_1_ZERO_DTIME, &pctx)) {
1484                                         inode->i_dtime = ctx->now;
1485                                         e2fsck_write_inode(ctx, ino, inode,
1486                                                            "pass1");
1487                                         failed_csum = 0;
1488                                 }
1489                         }
1490                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1491                         continue;
1492                 }
1493
1494                 if ((inode->i_flags & EXT4_CASEFOLD_FL) &&
1495                     ((!LINUX_S_ISDIR(inode->i_mode) &&
1496                       fix_problem(ctx, PR_1_CASEFOLD_NONDIR, &pctx)) ||
1497                      (!casefold_fs &&
1498                       fix_problem(ctx, PR_1_CASEFOLD_FEATURE, &pctx)))) {
1499                         inode->i_flags &= ~EXT4_CASEFOLD_FL;
1500                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1501                 }
1502
1503                 /* Conflicting inlinedata/extents inode flags? */
1504                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
1505                     (inode->i_flags & EXT4_EXTENTS_FL)) {
1506                         int res = fix_inline_data_extents_file(ctx, ino, inode,
1507                                                                inode_size,
1508                                                                &pctx);
1509                         if (res < 0) {
1510                                 /* skip FINISH_INODE_LOOP */
1511                                 continue;
1512                         }
1513                 }
1514
1515                 /* Test for incorrect inline_data flags settings. */
1516                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && !inlinedata_fs &&
1517                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1518                         size_t size = 0;
1519
1520                         pctx.errcode = get_inline_data_ea_size(fs, ino, inode,
1521                                                                &size);
1522                         if (!pctx.errcode &&
1523                             fix_problem(ctx, PR_1_INLINE_DATA_FEATURE, &pctx)) {
1524                                 ext2fs_set_feature_inline_data(sb);
1525                                 ext2fs_mark_super_dirty(fs);
1526                                 inlinedata_fs = 1;
1527                         } else if (fix_problem(ctx, PR_1_INLINE_DATA_SET, &pctx)) {
1528                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1529                                 /* skip FINISH_INODE_LOOP */
1530                                 continue;
1531                         }
1532                 }
1533
1534                 /* Test for inline data flag but no attr */
1535                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && inlinedata_fs &&
1536                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1537                         size_t size = 0;
1538                         errcode_t err;
1539                         int flags;
1540
1541                         flags = fs->flags;
1542                         if (failed_csum)
1543                                 fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1544                         err = get_inline_data_ea_size(fs, ino, inode, &size);
1545                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1546                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1547
1548                         switch (err) {
1549                         case 0:
1550                                 /* Everything is awesome... */
1551                                 break;
1552                         case EXT2_ET_BAD_EA_BLOCK_NUM:
1553                         case EXT2_ET_BAD_EA_HASH:
1554                         case EXT2_ET_BAD_EA_HEADER:
1555                         case EXT2_ET_EA_BAD_NAME_LEN:
1556                         case EXT2_ET_EA_BAD_VALUE_SIZE:
1557                         case EXT2_ET_EA_KEY_NOT_FOUND:
1558                         case EXT2_ET_EA_NO_SPACE:
1559                         case EXT2_ET_MISSING_EA_FEATURE:
1560                         case EXT2_ET_INLINE_DATA_CANT_ITERATE:
1561                         case EXT2_ET_INLINE_DATA_NO_BLOCK:
1562                         case EXT2_ET_INLINE_DATA_NO_SPACE:
1563                         case EXT2_ET_NO_INLINE_DATA:
1564                         case EXT2_ET_EXT_ATTR_CSUM_INVALID:
1565                         case EXT2_ET_EA_BAD_VALUE_OFFSET:
1566                         case EXT2_ET_EA_INODE_CORRUPTED:
1567                                 /* broken EA or no system.data EA; truncate */
1568                                 if (fix_problem(ctx, PR_1_INLINE_DATA_NO_ATTR,
1569                                                 &pctx)) {
1570                                         err = ext2fs_inode_size_set(fs, inode, 0);
1571                                         if (err) {
1572                                                 pctx.errcode = err;
1573                                                 ctx->flags |= E2F_FLAG_ABORT;
1574                                                 goto endit;
1575                                         }
1576                                         inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1577                                         memset(&inode->i_block, 0,
1578                                                sizeof(inode->i_block));
1579                                         e2fsck_write_inode(ctx, ino, inode,
1580                                                            "pass1");
1581                                         failed_csum = 0;
1582                                 }
1583                                 break;
1584                         default:
1585                                 /* Some other kind of non-xattr error? */
1586                                 pctx.errcode = err;
1587                                 ctx->flags |= E2F_FLAG_ABORT;
1588                                 goto endit;
1589                         }
1590                 }
1591
1592                 /*
1593                  * Test for incorrect extent flag settings.
1594                  *
1595                  * On big-endian machines we must be careful:
1596                  * When the inode is read, the i_block array is not swapped
1597                  * if the extent flag is set.  Therefore if we are testing
1598                  * for or fixing a wrongly-set flag, we must potentially
1599                  * (un)swap before testing, or after fixing.
1600                  */
1601
1602                 /*
1603                  * In this case the extents flag was set when read, so
1604                  * extent_header_verify is ok.  If the inode is cleared,
1605                  * no need to swap... so no extra swapping here.
1606                  */
1607                 if ((inode->i_flags & EXT4_EXTENTS_FL) && !extent_fs &&
1608                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1609                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO))) {
1610                         if ((ext2fs_extent_header_verify(inode->i_block,
1611                                                  sizeof(inode->i_block)) == 0) &&
1612                             fix_problem(ctx, PR_1_EXTENT_FEATURE, &pctx)) {
1613                                 ext2fs_set_feature_extents(sb);
1614                                 ext2fs_mark_super_dirty(fs);
1615                                 extent_fs = 1;
1616                         } else if (fix_problem(ctx, PR_1_EXTENTS_SET, &pctx)) {
1617                         clear_inode:
1618                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1619                                 if (ino == EXT2_BAD_INO)
1620                                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map,
1621                                                                  ino);
1622                                 /* skip FINISH_INODE_LOOP */
1623                                 continue;
1624                         }
1625                 }
1626
1627                 /*
1628                  * For big-endian machines:
1629                  * If the inode didn't have the extents flag set when it
1630                  * was read, then the i_blocks array was swapped.  To test
1631                  * as an extents header, we must swap it back first.
1632                  * IF we then set the extents flag, the entire i_block
1633                  * array must be un/re-swapped to make it proper extents data.
1634                  */
1635                 if (extent_fs && !(inode->i_flags & EXT4_EXTENTS_FL) &&
1636                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1637                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO)) &&
1638                     (LINUX_S_ISREG(inode->i_mode) ||
1639                      LINUX_S_ISDIR(inode->i_mode))) {
1640                         void *ehp;
1641 #ifdef WORDS_BIGENDIAN
1642                         __u32 tmp_block[EXT2_N_BLOCKS];
1643
1644                         for (i = 0; i < EXT2_N_BLOCKS; i++)
1645                                 tmp_block[i] = ext2fs_swab32(inode->i_block[i]);
1646                         ehp = tmp_block;
1647 #else
1648                         ehp = inode->i_block;
1649 #endif
1650                         if ((ext2fs_extent_header_verify(ehp,
1651                                          sizeof(inode->i_block)) == 0) &&
1652                             (fix_problem(ctx, PR_1_UNSET_EXTENT_FL, &pctx))) {
1653                                 inode->i_flags |= EXT4_EXTENTS_FL;
1654 #ifdef WORDS_BIGENDIAN
1655                                 memcpy(inode->i_block, tmp_block,
1656                                        sizeof(inode->i_block));
1657 #endif
1658                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1659                                 failed_csum = 0;
1660                         }
1661                 }
1662
1663                 if (ino == EXT2_BAD_INO) {
1664                         struct process_block_struct pb;
1665
1666                         if ((failed_csum || inode->i_mode || inode->i_uid ||
1667                              inode->i_gid || inode->i_links_count ||
1668                              (inode->i_flags & EXT4_INLINE_DATA_FL) ||
1669                              inode->i_file_acl) &&
1670                             fix_problem(ctx, PR_1_INVALID_BAD_INODE, &pctx)) {
1671                                 memset(inode, 0, sizeof(struct ext2_inode));
1672                                 e2fsck_write_inode(ctx, ino, inode,
1673                                                    "clear bad inode");
1674                                 failed_csum = 0;
1675                         }
1676
1677                         pctx.errcode = ext2fs_copy_bitmap(ctx->block_found_map,
1678                                                           &pb.fs_meta_blocks);
1679                         if (pctx.errcode) {
1680                                 pctx.num = 4;
1681                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1682                                 ctx->flags |= E2F_FLAG_ABORT;
1683                                 goto endit;
1684                         }
1685                         pb.ino = EXT2_BAD_INO;
1686                         pb.num_blocks = pb.last_block = 0;
1687                         pb.last_db_block = -1;
1688                         pb.num_illegal_blocks = 0;
1689                         pb.suppress = 0; pb.clear = 0; pb.is_dir = 0;
1690                         pb.is_reg = 0; pb.fragmented = 0; pb.bbcheck = 0;
1691                         pb.inode = inode;
1692                         pb.pctx = &pctx;
1693                         pb.ctx = ctx;
1694                         pctx.errcode = ext2fs_block_iterate3(fs, ino, 0,
1695                                      block_buf, process_bad_block, &pb);
1696                         ext2fs_free_block_bitmap(pb.fs_meta_blocks);
1697                         if (pctx.errcode) {
1698                                 fix_problem(ctx, PR_1_BLOCK_ITERATE, &pctx);
1699                                 ctx->flags |= E2F_FLAG_ABORT;
1700                                 goto endit;
1701                         }
1702                         if (pb.bbcheck)
1703                                 if (!fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK_PROMPT, &pctx)) {
1704                                 ctx->flags |= E2F_FLAG_ABORT;
1705                                 goto endit;
1706                         }
1707                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1708                         clear_problem_context(&pctx);
1709                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1710                         continue;
1711                 } else if (ino == EXT2_ROOT_INO) {
1712                         /*
1713                          * Make sure the root inode is a directory; if
1714                          * not, offer to clear it.  It will be
1715                          * regenerated in pass #3.
1716                          */
1717                         if (!LINUX_S_ISDIR(inode->i_mode)) {
1718                                 if (fix_problem(ctx, PR_1_ROOT_NO_DIR, &pctx))
1719                                         goto clear_inode;
1720                         }
1721                         /*
1722                          * If dtime is set, offer to clear it.  mke2fs
1723                          * version 0.2b created filesystems with the
1724                          * dtime field set for the root and lost+found
1725                          * directories.  We won't worry about
1726                          * /lost+found, since that can be regenerated
1727                          * easily.  But we will fix the root directory
1728                          * as a special case.
1729                          */
1730                         if (inode->i_dtime && inode->i_links_count) {
1731                                 if (fix_problem(ctx, PR_1_ROOT_DTIME, &pctx)) {
1732                                         inode->i_dtime = 0;
1733                                         e2fsck_write_inode(ctx, ino, inode,
1734                                                            "pass1");
1735                                         failed_csum = 0;
1736                                 }
1737                         }
1738                 } else if (ino == EXT2_JOURNAL_INO) {
1739                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1740                         if (fs->super->s_journal_inum == EXT2_JOURNAL_INO) {
1741                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1742                                     fix_problem(ctx, PR_1_JOURNAL_BAD_MODE,
1743                                                 &pctx)) {
1744                                         inode->i_mode = LINUX_S_IFREG;
1745                                         e2fsck_write_inode(ctx, ino, inode,
1746                                                            "pass1");
1747                                         failed_csum = 0;
1748                                 }
1749                                 check_blocks(ctx, &pctx, block_buf, NULL);
1750                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1751                                 continue;
1752                         }
1753                         if ((inode->i_links_count ||
1754                              inode->i_blocks || inode->i_block[0]) &&
1755                             fix_problem(ctx, PR_1_JOURNAL_INODE_NOT_CLEAR,
1756                                         &pctx)) {
1757                                 memset(inode, 0, inode_size);
1758                                 ext2fs_icount_store(ctx->inode_link_info,
1759                                                     ino, 0);
1760                                 e2fsck_write_inode_full(ctx, ino, inode,
1761                                                         inode_size, "pass1");
1762                                 failed_csum = 0;
1763                         }
1764                 } else if (quota_inum_is_reserved(fs, ino)) {
1765                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1766                         if (ext2fs_has_feature_quota(fs->super) &&
1767                             quota_inum_is_super(fs->super, ino)) {
1768                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1769                                     fix_problem(ctx, PR_1_QUOTA_BAD_MODE,
1770                                                         &pctx)) {
1771                                         inode->i_mode = LINUX_S_IFREG;
1772                                         e2fsck_write_inode(ctx, ino, inode,
1773                                                         "pass1");
1774                                         failed_csum = 0;
1775                                 }
1776                                 check_blocks(ctx, &pctx, block_buf, NULL);
1777                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1778                                 continue;
1779                         }
1780                         if ((inode->i_links_count ||
1781                              inode->i_blocks || inode->i_block[0]) &&
1782                             fix_problem(ctx, PR_1_QUOTA_INODE_NOT_CLEAR,
1783                                         &pctx)) {
1784                                 memset(inode, 0, inode_size);
1785                                 ext2fs_icount_store(ctx->inode_link_info,
1786                                                     ino, 0);
1787                                 e2fsck_write_inode_full(ctx, ino, inode,
1788                                                         inode_size, "pass1");
1789                                 failed_csum = 0;
1790                         }
1791                 } else if (ino == fs->super->s_orphan_file_inum) {
1792                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1793                         if (ext2fs_has_feature_orphan_file(fs->super)) {
1794                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1795                                     fix_problem(ctx, PR_1_ORPHAN_FILE_BAD_MODE,
1796                                                 &pctx)) {
1797                                         inode->i_mode = LINUX_S_IFREG;
1798                                         e2fsck_write_inode(ctx, ino, inode,
1799                                                            "pass1");
1800                                         failed_csum = 0;
1801                                 }
1802                                 check_blocks(ctx, &pctx, block_buf, NULL);
1803                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1804                                 continue;
1805                         }
1806                         if ((inode->i_links_count ||
1807                              inode->i_blocks || inode->i_block[0]) &&
1808                             fix_problem(ctx, PR_1_ORPHAN_FILE_NOT_CLEAR,
1809                                         &pctx)) {
1810                                 memset(inode, 0, inode_size);
1811                                 ext2fs_icount_store(ctx->inode_link_info, ino,
1812                                                     0);
1813                                 e2fsck_write_inode_full(ctx, ino, inode,
1814                                                         inode_size, "pass1");
1815                                 failed_csum = 0;
1816                         }
1817                 } else if (ino < EXT2_FIRST_INODE(fs->super)) {
1818                         problem_t problem = 0;
1819
1820                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1821                         if (ino == EXT2_BOOT_LOADER_INO) {
1822                                 if (LINUX_S_ISDIR(inode->i_mode))
1823                                         problem = PR_1_RESERVED_BAD_MODE;
1824                         } else if (ino == EXT2_RESIZE_INO) {
1825                                 if (inode->i_mode &&
1826                                     !LINUX_S_ISREG(inode->i_mode))
1827                                         problem = PR_1_RESERVED_BAD_MODE;
1828                         } else {
1829                                 if (inode->i_mode != 0)
1830                                         problem = PR_1_RESERVED_BAD_MODE;
1831                         }
1832                         if (problem) {
1833                                 if (fix_problem(ctx, problem, &pctx)) {
1834                                         inode->i_mode = 0;
1835                                         e2fsck_write_inode(ctx, ino, inode,
1836                                                            "pass1");
1837                                         failed_csum = 0;
1838                                 }
1839                         }
1840                         check_blocks(ctx, &pctx, block_buf, NULL);
1841                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1842                         continue;
1843                 }
1844
1845                 if (!inode->i_links_count) {
1846                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1847                         continue;
1848                 }
1849                 /*
1850                  * n.b.  0.3c ext2fs code didn't clear i_links_count for
1851                  * deleted files.  Oops.
1852                  *
1853                  * Since all new ext2 implementations get this right,
1854                  * we now assume that the case of non-zero
1855                  * i_links_count and non-zero dtime means that we
1856                  * should keep the file, not delete it.
1857                  *
1858                  */
1859                 if (inode->i_dtime) {
1860                         if (fix_problem(ctx, PR_1_SET_DTIME, &pctx)) {
1861                                 inode->i_dtime = 0;
1862                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1863                                 failed_csum = 0;
1864                         }
1865                 }
1866
1867                 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1868                 switch (fs->super->s_creator_os) {
1869                     case EXT2_OS_HURD:
1870                         frag = inode->osd2.hurd2.h_i_frag;
1871                         fsize = inode->osd2.hurd2.h_i_fsize;
1872                         break;
1873                     default:
1874                         frag = fsize = 0;
1875                 }
1876
1877                 if (inode->i_faddr || frag || fsize ||
1878                     (!ext2fs_has_feature_largedir(fs->super) &&
1879                     (LINUX_S_ISDIR(inode->i_mode) && inode->i_size_high)))
1880                         mark_inode_bad(ctx, ino);
1881                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1882                     !ext2fs_has_feature_64bit(fs->super) &&
1883                     inode->osd2.linux2.l_i_file_acl_high != 0)
1884                         mark_inode_bad(ctx, ino);
1885                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1886                     !ext2fs_has_feature_huge_file(fs->super) &&
1887                     (inode->osd2.linux2.l_i_blocks_hi != 0))
1888                         mark_inode_bad(ctx, ino);
1889                 if (inode->i_flags & EXT2_IMAGIC_FL) {
1890                         if (imagic_fs) {
1891                                 if (!ctx->inode_imagic_map)
1892                                         alloc_imagic_map(ctx);
1893                                 ext2fs_mark_inode_bitmap2(ctx->inode_imagic_map,
1894                                                          ino);
1895                         } else {
1896                                 if (fix_problem(ctx, PR_1_SET_IMAGIC, &pctx)) {
1897                                         inode->i_flags &= ~EXT2_IMAGIC_FL;
1898                                         e2fsck_write_inode(ctx, ino,
1899                                                            inode, "pass1");
1900                                         failed_csum = 0;
1901                                 }
1902                         }
1903                 }
1904
1905                 check_inode_extra_space(ctx, &pctx, &ea_ibody_quota);
1906                 check_is_really_dir(ctx, &pctx, block_buf);
1907
1908                 /*
1909                  * ext2fs_inode_has_valid_blocks2 does not actually look
1910                  * at i_block[] values, so not endian-sensitive here.
1911                  */
1912                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL) &&
1913                     LINUX_S_ISLNK(inode->i_mode) &&
1914                     !ext2fs_inode_has_valid_blocks2(fs, inode) &&
1915                     fix_problem(ctx, PR_1_FAST_SYMLINK_EXTENT_FL, &pctx)) {
1916                         inode->i_flags &= ~EXT4_EXTENTS_FL;
1917                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1918                         failed_csum = 0;
1919                 }
1920
1921                 if ((inode->i_flags & EXT4_ENCRYPT_FL) &&
1922                     add_encrypted_file(ctx, &pctx) < 0)
1923                         goto clear_inode;
1924
1925                 if (casefold_fs && inode->i_flags & EXT4_CASEFOLD_FL)
1926                         ext2fs_mark_inode_bitmap2(ctx->inode_casefold_map, ino);
1927
1928                 if (LINUX_S_ISDIR(inode->i_mode)) {
1929                         ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
1930                         e2fsck_add_dir_info(ctx, ino, 0);
1931                         ctx->fs_directory_count++;
1932                         if (inode->i_flags & EXT4_CASEFOLD_FL)
1933                                 add_casefolded_dir(ctx, ino);
1934                 } else if (LINUX_S_ISREG (inode->i_mode)) {
1935                         ext2fs_mark_inode_bitmap2(ctx->inode_reg_map, ino);
1936                         ctx->fs_regular_count++;
1937                 } else if (LINUX_S_ISCHR (inode->i_mode) &&
1938                            e2fsck_pass1_check_device_inode(fs, inode)) {
1939                         check_extents_inlinedata(ctx, &pctx);
1940                         check_immutable(ctx, &pctx);
1941                         check_size(ctx, &pctx);
1942                         ctx->fs_chardev_count++;
1943                 } else if (LINUX_S_ISBLK (inode->i_mode) &&
1944                            e2fsck_pass1_check_device_inode(fs, inode)) {
1945                         check_extents_inlinedata(ctx, &pctx);
1946                         check_immutable(ctx, &pctx);
1947                         check_size(ctx, &pctx);
1948                         ctx->fs_blockdev_count++;
1949                 } else if (LINUX_S_ISLNK (inode->i_mode) &&
1950                            e2fsck_pass1_check_symlink(fs, ino, inode,
1951                                                       block_buf)) {
1952                         check_immutable(ctx, &pctx);
1953                         ctx->fs_symlinks_count++;
1954                         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
1955                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1956                                 continue;
1957                         } else if (ext2fs_is_fast_symlink(inode)) {
1958                                 ctx->fs_fast_symlinks_count++;
1959                                 check_blocks(ctx, &pctx, block_buf,
1960                                              &ea_ibody_quota);
1961                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1962                                 continue;
1963                         }
1964                 }
1965                 else if (LINUX_S_ISFIFO (inode->i_mode) &&
1966                          e2fsck_pass1_check_device_inode(fs, inode)) {
1967                         check_extents_inlinedata(ctx, &pctx);
1968                         check_immutable(ctx, &pctx);
1969                         check_size(ctx, &pctx);
1970                         ctx->fs_fifo_count++;
1971                 } else if ((LINUX_S_ISSOCK (inode->i_mode)) &&
1972                            e2fsck_pass1_check_device_inode(fs, inode)) {
1973                         check_extents_inlinedata(ctx, &pctx);
1974                         check_immutable(ctx, &pctx);
1975                         check_size(ctx, &pctx);
1976                         ctx->fs_sockets_count++;
1977                 } else
1978                         mark_inode_bad(ctx, ino);
1979                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1980                     !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
1981                         if (inode->i_block[EXT2_IND_BLOCK])
1982                                 ctx->fs_ind_count++;
1983                         if (inode->i_block[EXT2_DIND_BLOCK])
1984                                 ctx->fs_dind_count++;
1985                         if (inode->i_block[EXT2_TIND_BLOCK])
1986                                 ctx->fs_tind_count++;
1987                 }
1988                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1989                     !(inode->i_flags & EXT4_INLINE_DATA_FL) &&
1990                     (inode->i_block[EXT2_IND_BLOCK] ||
1991                      inode->i_block[EXT2_DIND_BLOCK] ||
1992                      inode->i_block[EXT2_TIND_BLOCK] ||
1993                      ext2fs_file_acl_block(fs, inode))) {
1994                         struct process_inode_block *itp;
1995
1996                         itp = &inodes_to_process[process_inode_count];
1997                         itp->ino = ino;
1998                         itp->ea_ibody_quota = ea_ibody_quota;
1999                         if (inode_size < sizeof(struct ext2_inode_large))
2000                                 memcpy(&itp->inode, inode, inode_size);
2001                         else
2002                                 memcpy(&itp->inode, inode, sizeof(itp->inode));
2003                         process_inode_count++;
2004                 } else
2005                         check_blocks(ctx, &pctx, block_buf, &ea_ibody_quota);
2006
2007                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
2008
2009                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2010                         goto endit;
2011
2012                 if (process_inode_count >= ctx->process_inode_size) {
2013                         process_inodes(ctx, block_buf);
2014
2015                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2016                                 goto endit;
2017                 }
2018         }
2019         process_inodes(ctx, block_buf);
2020         ext2fs_close_inode_scan(scan);
2021         scan = NULL;
2022
2023         reserve_block_for_root_repair(ctx);
2024         reserve_block_for_lnf_repair(ctx);
2025
2026         /*
2027          * If any extended attribute blocks' reference counts need to
2028          * be adjusted, either up (ctx->refcount_extra), or down
2029          * (ctx->refcount), then fix them.
2030          */
2031         if (ctx->refcount) {
2032                 adjust_extattr_refcount(ctx, ctx->refcount, block_buf, -1);
2033                 ea_refcount_free(ctx->refcount);
2034                 ctx->refcount = 0;
2035         }
2036         if (ctx->refcount_extra) {
2037                 adjust_extattr_refcount(ctx, ctx->refcount_extra,
2038                                         block_buf, +1);
2039                 ea_refcount_free(ctx->refcount_extra);
2040                 ctx->refcount_extra = 0;
2041         }
2042
2043         if (ctx->ea_block_quota_blocks) {
2044                 ea_refcount_free(ctx->ea_block_quota_blocks);
2045                 ctx->ea_block_quota_blocks = 0;
2046         }
2047
2048         if (ctx->ea_block_quota_inodes) {
2049                 ea_refcount_free(ctx->ea_block_quota_inodes);
2050                 ctx->ea_block_quota_inodes = 0;
2051         }
2052
2053         if (ctx->invalid_bitmaps)
2054                 handle_fs_bad_blocks(ctx);
2055
2056         /* We don't need the block_ea_map any more */
2057         if (ctx->block_ea_map) {
2058                 ext2fs_free_block_bitmap(ctx->block_ea_map);
2059                 ctx->block_ea_map = 0;
2060         }
2061
2062         /* We don't need the encryption policy => ID map any more */
2063         destroy_encryption_policy_map(ctx);
2064
2065         if (ctx->flags & E2F_FLAG_RESIZE_INODE) {
2066                 clear_problem_context(&pctx);
2067                 pctx.errcode = ext2fs_create_resize_inode(fs);
2068                 if (pctx.errcode) {
2069                         if (!fix_problem(ctx, PR_1_RESIZE_INODE_CREATE,
2070                                          &pctx)) {
2071                                 ctx->flags |= E2F_FLAG_ABORT;
2072                                 goto endit;
2073                         }
2074                         pctx.errcode = 0;
2075                 }
2076                 if (!pctx.errcode) {
2077                         e2fsck_read_inode(ctx, EXT2_RESIZE_INO, inode,
2078                                           "recreate inode");
2079                         inode->i_mtime = ctx->now;
2080                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, inode,
2081                                            "recreate inode");
2082                 }
2083                 ctx->flags &= ~E2F_FLAG_RESIZE_INODE;
2084         }
2085
2086         if (ctx->flags & E2F_FLAG_RESTART) {
2087                 /*
2088                  * Only the master copy of the superblock and block
2089                  * group descriptors are going to be written during a
2090                  * restart, so set the superblock to be used to be the
2091                  * master superblock.
2092                  */
2093                 ctx->use_superblock = 0;
2094                 goto endit;
2095         }
2096
2097         if (ctx->large_dirs && !ext2fs_has_feature_largedir(fs->super)) {
2098                 if (fix_problem(ctx, PR_2_FEATURE_LARGE_DIRS, &pctx)) {
2099                         ext2fs_set_feature_largedir(fs->super);
2100                         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2101                         ext2fs_mark_super_dirty(fs);
2102                 }
2103                 if (fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
2104                     fix_problem(ctx, PR_1_FS_REV_LEVEL, &pctx)) {
2105                         ext2fs_update_dynamic_rev(fs);
2106                         ext2fs_mark_super_dirty(fs);
2107                 }
2108         }
2109
2110         if (ctx->block_dup_map) {
2111                 if (ctx->options & E2F_OPT_PREEN) {
2112                         clear_problem_context(&pctx);
2113                         fix_problem(ctx, PR_1_DUP_BLOCKS_PREENSTOP, &pctx);
2114                 }
2115                 e2fsck_pass1_dupblocks(ctx, block_buf);
2116         }
2117         ctx->flags |= E2F_FLAG_ALLOC_OK;
2118 endit:
2119         e2fsck_use_inode_shortcuts(ctx, 0);
2120         ext2fs_free_mem(&inodes_to_process);
2121         inodes_to_process = 0;
2122
2123         if (scan)
2124                 ext2fs_close_inode_scan(scan);
2125         if (block_buf)
2126                 ext2fs_free_mem(&block_buf);
2127         if (inode)
2128                 ext2fs_free_mem(&inode);
2129
2130         /*
2131          * The l+f inode may have been cleared, so zap it now and
2132          * later passes will recalculate it if necessary
2133          */
2134         ctx->lost_and_found = 0;
2135
2136         if ((ctx->flags & E2F_FLAG_SIGNAL_MASK) == 0)
2137                 print_resource_track(ctx, _("Pass 1"), &rtrack, ctx->fs->io);
2138         else
2139                 ctx->invalid_bitmaps++;
2140 }
2141 #undef FINISH_INODE_LOOP
2142
2143 /*
2144  * When the inode_scan routines call this callback at the end of the
2145  * glock group, call process_inodes.
2146  */
2147 static errcode_t scan_callback(ext2_filsys fs,
2148                                ext2_inode_scan scan EXT2FS_ATTR((unused)),
2149                                dgrp_t group, void * priv_data)
2150 {
2151         struct scan_callback_struct *scan_struct;
2152         e2fsck_t ctx;
2153
2154         scan_struct = (struct scan_callback_struct *) priv_data;
2155         ctx = scan_struct->ctx;
2156
2157         process_inodes((e2fsck_t) fs->priv_data, scan_struct->block_buf);
2158
2159         if (ctx->progress)
2160                 if ((ctx->progress)(ctx, 1, group+1,
2161                                     ctx->fs->group_desc_count))
2162                         return EXT2_ET_CANCEL_REQUESTED;
2163
2164         return 0;
2165 }
2166
2167 /*
2168  * Process the inodes in the "inodes to process" list.
2169  */
2170 static void process_inodes(e2fsck_t ctx, char *block_buf)
2171 {
2172         int                     i;
2173         struct ext2_inode       *old_stashed_inode;
2174         ext2_ino_t              old_stashed_ino;
2175         const char              *old_operation;
2176         char                    buf[80];
2177         struct problem_context  pctx;
2178
2179 #if 0
2180         printf("begin process_inodes: ");
2181 #endif
2182         if (process_inode_count == 0)
2183                 return;
2184         old_operation = ehandler_operation(0);
2185         old_stashed_inode = ctx->stashed_inode;
2186         old_stashed_ino = ctx->stashed_ino;
2187         qsort(inodes_to_process, process_inode_count,
2188                       sizeof(struct process_inode_block), process_inode_cmp);
2189         clear_problem_context(&pctx);
2190         for (i=0; i < process_inode_count; i++) {
2191                 pctx.inode = ctx->stashed_inode =
2192                         (struct ext2_inode *) &inodes_to_process[i].inode;
2193                 pctx.ino = ctx->stashed_ino = inodes_to_process[i].ino;
2194
2195 #if 0
2196                 printf("%u ", pctx.ino);
2197 #endif
2198                 sprintf(buf, _("reading indirect blocks of inode %u"),
2199                         pctx.ino);
2200                 ehandler_operation(buf);
2201                 check_blocks(ctx, &pctx, block_buf,
2202                              &inodes_to_process[i].ea_ibody_quota);
2203                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2204                         break;
2205         }
2206         ctx->stashed_inode = old_stashed_inode;
2207         ctx->stashed_ino = old_stashed_ino;
2208         process_inode_count = 0;
2209 #if 0
2210         printf("end process inodes\n");
2211 #endif
2212         ehandler_operation(old_operation);
2213 }
2214
2215 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b)
2216 {
2217         const struct process_inode_block *ib_a =
2218                 (const struct process_inode_block *) a;
2219         const struct process_inode_block *ib_b =
2220                 (const struct process_inode_block *) b;
2221         int     ret;
2222
2223         ret = (ib_a->inode.i_block[EXT2_IND_BLOCK] -
2224                ib_b->inode.i_block[EXT2_IND_BLOCK]);
2225         if (ret == 0)
2226                 /*
2227                  * We only call process_inodes() for non-extent
2228                  * inodes, so it's OK to pass NULL to
2229                  * ext2fs_file_acl_block() here.
2230                  */
2231                 ret = ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_a->inode)) -
2232                         ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_b->inode));
2233         if (ret == 0)
2234                 ret = ib_a->ino - ib_b->ino;
2235         return ret;
2236 }
2237
2238 /*
2239  * Mark an inode as being bad in some what
2240  */
2241 static void mark_inode_bad(e2fsck_t ctx, ext2_ino_t ino)
2242 {
2243         struct          problem_context pctx;
2244
2245         if (!ctx->inode_bad_map) {
2246                 clear_problem_context(&pctx);
2247
2248                 pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2249                                 _("bad inode map"), EXT2FS_BMAP64_RBTREE,
2250                                 "inode_bad_map", &ctx->inode_bad_map);
2251                 if (pctx.errcode) {
2252                         pctx.num = 3;
2253                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2254                         /* Should never get here */
2255                         ctx->flags |= E2F_FLAG_ABORT;
2256                         return;
2257                 }
2258         }
2259         ext2fs_mark_inode_bitmap2(ctx->inode_bad_map, ino);
2260 }
2261
2262 static void add_casefolded_dir(e2fsck_t ctx, ext2_ino_t ino)
2263 {
2264         struct          problem_context pctx;
2265
2266         if (!ctx->casefolded_dirs) {
2267                 pctx.errcode = ext2fs_u32_list_create(&ctx->casefolded_dirs, 0);
2268                 if (pctx.errcode)
2269                         goto error;
2270         }
2271         pctx.errcode = ext2fs_u32_list_add(ctx->casefolded_dirs, ino);
2272         if (pctx.errcode == 0)
2273                 return;
2274 error:
2275         fix_problem(ctx, PR_1_ALLOCATE_CASEFOLDED_DIRLIST, &pctx);
2276         /* Should never get here */
2277         ctx->flags |= E2F_FLAG_ABORT;
2278 }
2279
2280 /*
2281  * This procedure will allocate the inode "bb" (badblock) map table
2282  */
2283 static void alloc_bb_map(e2fsck_t ctx)
2284 {
2285         struct          problem_context pctx;
2286
2287         clear_problem_context(&pctx);
2288         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2289                         _("inode in bad block map"), EXT2FS_BMAP64_RBTREE,
2290                         "inode_bb_map", &ctx->inode_bb_map);
2291         if (pctx.errcode) {
2292                 pctx.num = 4;
2293                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2294                 /* Should never get here */
2295                 ctx->flags |= E2F_FLAG_ABORT;
2296                 return;
2297         }
2298 }
2299
2300 /*
2301  * This procedure will allocate the inode imagic table
2302  */
2303 static void alloc_imagic_map(e2fsck_t ctx)
2304 {
2305         struct          problem_context pctx;
2306
2307         clear_problem_context(&pctx);
2308         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2309                         _("imagic inode map"), EXT2FS_BMAP64_RBTREE,
2310                         "inode_imagic_map", &ctx->inode_imagic_map);
2311         if (pctx.errcode) {
2312                 pctx.num = 5;
2313                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2314                 /* Should never get here */
2315                 ctx->flags |= E2F_FLAG_ABORT;
2316                 return;
2317         }
2318 }
2319
2320 /*
2321  * Marks a block as in use, setting the dup_map if it's been set
2322  * already.  Called by process_block and process_bad_block.
2323  *
2324  * WARNING: Assumes checks have already been done to make sure block
2325  * is valid.  This is true in both process_block and process_bad_block.
2326  */
2327 static _INLINE_ void mark_block_used(e2fsck_t ctx, blk64_t block)
2328 {
2329         struct          problem_context pctx;
2330
2331         clear_problem_context(&pctx);
2332
2333         if (ext2fs_fast_test_block_bitmap2(ctx->block_found_map, block)) {
2334                 if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2335                     !(ctx->options & E2F_OPT_UNSHARE_BLOCKS)) {
2336                         return;
2337                 }
2338                 if (!ctx->block_dup_map) {
2339                         pctx.errcode = e2fsck_allocate_block_bitmap(ctx->fs,
2340                                         _("multiply claimed block map"),
2341                                         EXT2FS_BMAP64_RBTREE, "block_dup_map",
2342                                         &ctx->block_dup_map);
2343                         if (pctx.errcode) {
2344                                 pctx.num = 3;
2345                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR,
2346                                             &pctx);
2347                                 /* Should never get here */
2348                                 ctx->flags |= E2F_FLAG_ABORT;
2349                                 return;
2350                         }
2351                 }
2352                 ext2fs_fast_mark_block_bitmap2(ctx->block_dup_map, block);
2353         } else {
2354                 ext2fs_fast_mark_block_bitmap2(ctx->block_found_map, block);
2355         }
2356 }
2357
2358 /*
2359  * When cluster size is greater than one block, it is caller's responsibility
2360  * to make sure block parameter starts at a cluster boundary.
2361  */
2362 static _INLINE_ void mark_blocks_used(e2fsck_t ctx, blk64_t block,
2363                                       unsigned int num)
2364 {
2365         if (ext2fs_test_block_bitmap_range2(ctx->block_found_map, block, num))
2366                 ext2fs_mark_block_bitmap_range2(ctx->block_found_map, block, num);
2367         else {
2368                 unsigned int i;
2369
2370                 for (i = 0; i < num; i += EXT2FS_CLUSTER_RATIO(ctx->fs))
2371                         mark_block_used(ctx, block + i);
2372         }
2373 }
2374
2375 /*
2376  * Adjust the extended attribute block's reference counts at the end
2377  * of pass 1, either by subtracting out references for EA blocks that
2378  * are still referenced in ctx->refcount, or by adding references for
2379  * EA blocks that had extra references as accounted for in
2380  * ctx->refcount_extra.
2381  */
2382 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
2383                                     char *block_buf, int adjust_sign)
2384 {
2385         struct ext2_ext_attr_header     *header;
2386         struct problem_context          pctx;
2387         ext2_filsys                     fs = ctx->fs;
2388         blk64_t                         blk;
2389         __u32                           should_be;
2390         ea_value_t                      count;
2391
2392         clear_problem_context(&pctx);
2393
2394         ea_refcount_intr_begin(refcount);
2395         while (1) {
2396                 if ((blk = ea_refcount_intr_next(refcount, &count)) == 0)
2397                         break;
2398                 pctx.blk = blk;
2399                 pctx.errcode = ext2fs_read_ext_attr3(fs, blk, block_buf,
2400                                                      pctx.ino);
2401                 if (pctx.errcode) {
2402                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
2403                         return;
2404                 }
2405                 header = (struct ext2_ext_attr_header *) block_buf;
2406                 pctx.blkcount = header->h_refcount;
2407                 should_be = header->h_refcount + adjust_sign * (int)count;
2408                 pctx.num = should_be;
2409                 if (fix_problem(ctx, PR_1_EXTATTR_REFCOUNT, &pctx)) {
2410                         header->h_refcount = should_be;
2411                         pctx.errcode = ext2fs_write_ext_attr3(fs, blk,
2412                                                              block_buf,
2413                                                              pctx.ino);
2414                         if (pctx.errcode) {
2415                                 fix_problem(ctx, PR_1_EXTATTR_WRITE_ABORT,
2416                                             &pctx);
2417                                 continue;
2418                         }
2419                 }
2420         }
2421 }
2422
2423 /*
2424  * Handle processing the extended attribute blocks
2425  */
2426 static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx,
2427                            char *block_buf, struct ea_quota *ea_block_quota)
2428 {
2429         ext2_filsys fs = ctx->fs;
2430         ext2_ino_t      ino = pctx->ino;
2431         struct ext2_inode *inode = pctx->inode;
2432         blk64_t         blk;
2433         char *          end;
2434         struct ext2_ext_attr_header *header;
2435         struct ext2_ext_attr_entry *first, *entry;
2436         blk64_t         quota_blocks = EXT2FS_C2B(fs, 1);
2437         __u64           quota_inodes = 0;
2438         region_t        region = 0;
2439         int             failed_csum = 0;
2440
2441         ea_block_quota->blocks = 0;
2442         ea_block_quota->inodes = 0;
2443
2444         blk = ext2fs_file_acl_block(fs, inode);
2445         if (blk == 0)
2446                 return 0;
2447
2448         /*
2449          * If the Extended attribute flag isn't set, then a non-zero
2450          * file acl means that the inode is corrupted.
2451          *
2452          * Or if the extended attribute block is an invalid block,
2453          * then the inode is also corrupted.
2454          */
2455         if (!ext2fs_has_feature_xattr(fs->super) ||
2456             (blk < fs->super->s_first_data_block) ||
2457             (blk >= ext2fs_blocks_count(fs->super))) {
2458                 mark_inode_bad(ctx, ino);
2459                 return 0;
2460         }
2461
2462         /* If ea bitmap hasn't been allocated, create it */
2463         if (!ctx->block_ea_map) {
2464                 pctx->errcode = e2fsck_allocate_block_bitmap(fs,
2465                                         _("ext attr block map"),
2466                                         EXT2FS_BMAP64_RBTREE, "block_ea_map",
2467                                         &ctx->block_ea_map);
2468                 if (pctx->errcode) {
2469                         pctx->num = 2;
2470                         fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, pctx);
2471                         ctx->flags |= E2F_FLAG_ABORT;
2472                         return 0;
2473                 }
2474         }
2475
2476         /* Create the EA refcount structure if necessary */
2477         if (!ctx->refcount) {
2478                 pctx->errcode = ea_refcount_create(0, &ctx->refcount);
2479                 if (pctx->errcode) {
2480                         pctx->num = 1;
2481                         fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2482                         ctx->flags |= E2F_FLAG_ABORT;
2483                         return 0;
2484                 }
2485         }
2486
2487 #if 0
2488         /* Debugging text */
2489         printf("Inode %u has EA block %u\n", ino, blk);
2490 #endif
2491
2492         /* Have we seen this EA block before? */
2493         if (ext2fs_fast_test_block_bitmap2(ctx->block_ea_map, blk)) {
2494                 ea_block_quota->blocks = EXT2FS_C2B(fs, 1);
2495                 ea_block_quota->inodes = 0;
2496
2497                 if (ctx->ea_block_quota_blocks) {
2498                         ea_refcount_fetch(ctx->ea_block_quota_blocks, blk,
2499                                           &quota_blocks);
2500                         if (quota_blocks)
2501                                 ea_block_quota->blocks = quota_blocks;
2502                 }
2503
2504                 if (ctx->ea_block_quota_inodes)
2505                         ea_refcount_fetch(ctx->ea_block_quota_inodes, blk,
2506                                           &ea_block_quota->inodes);
2507
2508                 if (ea_refcount_decrement(ctx->refcount, blk, 0) == 0)
2509                         return 1;
2510                 /* Ooops, this EA was referenced more than it stated */
2511                 if (!ctx->refcount_extra) {
2512                         pctx->errcode = ea_refcount_create(0,
2513                                            &ctx->refcount_extra);
2514                         if (pctx->errcode) {
2515                                 pctx->num = 2;
2516                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2517                                 ctx->flags |= E2F_FLAG_ABORT;
2518                                 return 0;
2519                         }
2520                 }
2521                 ea_refcount_increment(ctx->refcount_extra, blk, 0);
2522                 return 1;
2523         }
2524
2525         /*
2526          * OK, we haven't seen this EA block yet.  So we need to
2527          * validate it
2528          */
2529         pctx->blk = blk;
2530         pctx->errcode = ext2fs_read_ext_attr3(fs, blk, block_buf, pctx->ino);
2531         if (pctx->errcode == EXT2_ET_EXT_ATTR_CSUM_INVALID) {
2532                 pctx->errcode = 0;
2533                 failed_csum = 1;
2534         } else if (pctx->errcode == EXT2_ET_BAD_EA_HEADER)
2535                 pctx->errcode = 0;
2536
2537         if (pctx->errcode &&
2538             fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx)) {
2539                 pctx->errcode = 0;
2540                 goto clear_extattr;
2541         }
2542         header = (struct ext2_ext_attr_header *) block_buf;
2543         pctx->blk = ext2fs_file_acl_block(fs, inode);
2544         if (((ctx->ext_attr_ver == 1) &&
2545              (header->h_magic != EXT2_EXT_ATTR_MAGIC_v1)) ||
2546             ((ctx->ext_attr_ver == 2) &&
2547              (header->h_magic != EXT2_EXT_ATTR_MAGIC))) {
2548                 if (fix_problem(ctx, PR_1_BAD_EA_BLOCK, pctx))
2549                         goto clear_extattr;
2550         }
2551
2552         if (header->h_blocks != 1) {
2553                 if (fix_problem(ctx, PR_1_EA_MULTI_BLOCK, pctx))
2554                         goto clear_extattr;
2555         }
2556
2557         if (pctx->errcode && fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx))
2558                 goto clear_extattr;
2559
2560         region = region_create(0, fs->blocksize);
2561         if (!region) {
2562                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
2563                 ctx->flags |= E2F_FLAG_ABORT;
2564                 return 0;
2565         }
2566         if (region_allocate(region, 0, sizeof(struct ext2_ext_attr_header))) {
2567                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2568                         goto clear_extattr;
2569         }
2570
2571         first = (struct ext2_ext_attr_entry *)(header+1);
2572         end = block_buf + fs->blocksize;
2573         entry = first;
2574         while ((char *)entry < end && *(__u32 *)entry) {
2575                 __u32 hash;
2576
2577                 if (region_allocate(region, (char *)entry - (char *)header,
2578                                    EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
2579                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2580                                 goto clear_extattr;
2581                         break;
2582                 }
2583                 if ((ctx->ext_attr_ver == 1 &&
2584                      (entry->e_name_len == 0 || entry->e_name_index != 0)) ||
2585                     (ctx->ext_attr_ver == 2 &&
2586                      entry->e_name_index == 0)) {
2587                         if (fix_problem(ctx, PR_1_EA_BAD_NAME, pctx))
2588                                 goto clear_extattr;
2589                         break;
2590                 }
2591                 if (entry->e_value_inum == 0) {
2592                         if (entry->e_value_size > EXT2_XATTR_SIZE_MAX ||
2593                             (entry->e_value_offs + entry->e_value_size >
2594                              fs->blocksize)) {
2595                                 if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2596                                         goto clear_extattr;
2597                                 break;
2598                         }
2599                         if (entry->e_value_size &&
2600                             region_allocate(region, entry->e_value_offs,
2601                                             EXT2_EXT_ATTR_SIZE(entry->e_value_size))) {
2602                                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION,
2603                                                 pctx))
2604                                         goto clear_extattr;
2605                         }
2606
2607                         hash = ext2fs_ext_attr_hash_entry(entry, block_buf +
2608                                                           entry->e_value_offs);
2609                         if (entry->e_hash != hash)
2610                                 hash = ext2fs_ext_attr_hash_entry_signed(entry,
2611                                         block_buf + entry->e_value_offs);
2612
2613                         if (entry->e_hash != hash) {
2614                                 pctx->num = entry->e_hash;
2615                                 if (fix_problem(ctx, PR_1_ATTR_HASH, pctx))
2616                                         goto clear_extattr;
2617                                 entry->e_hash = hash;
2618                         }
2619                 } else {
2620                         problem_t problem;
2621                         blk64_t entry_quota_blocks;
2622
2623                         problem = check_large_ea_inode(ctx, entry, pctx,
2624                                                        &entry_quota_blocks);
2625                         if (problem && fix_problem(ctx, problem, pctx))
2626                                 goto clear_extattr;
2627
2628                         quota_blocks += entry_quota_blocks;
2629                         quota_inodes++;
2630                 }
2631
2632                 entry = EXT2_EXT_ATTR_NEXT(entry);
2633         }
2634         if (region_allocate(region, (char *)entry - (char *)header, 4)) {
2635                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2636                         goto clear_extattr;
2637         }
2638         region_free(region);
2639
2640         /*
2641          * We only get here if there was no other errors that were fixed.
2642          * If there was a checksum fail, ask to correct it.
2643          */
2644         if (failed_csum &&
2645             fix_problem(ctx, PR_1_EA_BLOCK_ONLY_CSUM_INVALID, pctx)) {
2646                 pctx->errcode = ext2fs_write_ext_attr3(fs, blk, block_buf,
2647                                                        pctx->ino);
2648                 if (pctx->errcode)
2649                         return 0;
2650         }
2651
2652         if (quota_blocks != EXT2FS_C2B(fs, 1U)) {
2653                 if (!ctx->ea_block_quota_blocks) {
2654                         pctx->errcode = ea_refcount_create(0,
2655                                                 &ctx->ea_block_quota_blocks);
2656                         if (pctx->errcode) {
2657                                 pctx->num = 3;
2658                                 goto refcount_fail;
2659                         }
2660                 }
2661                 ea_refcount_store(ctx->ea_block_quota_blocks, blk,
2662                                   quota_blocks);
2663         }
2664
2665         if (quota_inodes) {
2666                 if (!ctx->ea_block_quota_inodes) {
2667                         pctx->errcode = ea_refcount_create(0,
2668                                                 &ctx->ea_block_quota_inodes);
2669                         if (pctx->errcode) {
2670                                 pctx->num = 4;
2671 refcount_fail:
2672                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2673                                 ctx->flags |= E2F_FLAG_ABORT;
2674                                 return 0;
2675                         }
2676                 }
2677
2678                 ea_refcount_store(ctx->ea_block_quota_inodes, blk,
2679                                   quota_inodes);
2680         }
2681         ea_block_quota->blocks = quota_blocks;
2682         ea_block_quota->inodes = quota_inodes;
2683
2684         inc_ea_inode_refs(ctx, pctx, first, end);
2685         ea_refcount_store(ctx->refcount, blk, header->h_refcount - 1);
2686         mark_block_used(ctx, blk);
2687         ext2fs_fast_mark_block_bitmap2(ctx->block_ea_map, blk);
2688         return 1;
2689
2690 clear_extattr:
2691         if (region)
2692                 region_free(region);
2693         ext2fs_file_acl_block_set(fs, inode, 0);
2694         e2fsck_write_inode(ctx, ino, inode, "check_ext_attr");
2695         return 0;
2696 }
2697
2698 /* Returns 1 if bad htree, 0 if OK */
2699 static int handle_htree(e2fsck_t ctx, struct problem_context *pctx,
2700                         ext2_ino_t ino, struct ext2_inode *inode,
2701                         char *block_buf)
2702 {
2703         struct ext2_dx_root_info        *root;
2704         ext2_filsys                     fs = ctx->fs;
2705         errcode_t                       retval;
2706         blk64_t                         blk;
2707
2708         if ((!LINUX_S_ISDIR(inode->i_mode) &&
2709              fix_problem(ctx, PR_1_HTREE_NODIR, pctx)) ||
2710             (!ext2fs_has_feature_dir_index(fs->super) &&
2711              fix_problem(ctx, PR_1_HTREE_SET, pctx)))
2712                 return 1;
2713
2714         pctx->errcode = ext2fs_bmap2(fs, ino, inode, 0, 0, 0, 0, &blk);
2715
2716         if ((pctx->errcode) ||
2717             (blk == 0) ||
2718             (blk < fs->super->s_first_data_block) ||
2719             (blk >= ext2fs_blocks_count(fs->super))) {
2720                 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2721                         return 1;
2722                 else
2723                         return 0;
2724         }
2725
2726         retval = io_channel_read_blk64(fs->io, blk, 1, block_buf);
2727         if (retval && fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2728                 return 1;
2729
2730         /* XXX should check that beginning matches a directory */
2731         root = (struct ext2_dx_root_info *) (block_buf + 24);
2732
2733         if ((root->reserved_zero || root->info_length < 8) &&
2734             fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2735                 return 1;
2736
2737         pctx->num = root->hash_version;
2738         if ((root->hash_version != EXT2_HASH_LEGACY) &&
2739             (root->hash_version != EXT2_HASH_HALF_MD4) &&
2740             (root->hash_version != EXT2_HASH_TEA) &&
2741             (root->hash_version != EXT2_HASH_SIPHASH) &&
2742             fix_problem(ctx, PR_1_HTREE_HASHV, pctx))
2743                 return 1;
2744
2745         if (ext4_hash_in_dirent(inode)) {
2746                 if (root->hash_version != EXT2_HASH_SIPHASH &&
2747                     fix_problem(ctx, PR_1_HTREE_NEEDS_SIPHASH, pctx))
2748                         return 1;
2749         } else {
2750                 if (root->hash_version == EXT2_HASH_SIPHASH &&
2751                    fix_problem(ctx, PR_1_HTREE_CANNOT_SIPHASH, pctx))
2752                         return 1;
2753         }
2754
2755         if ((root->unused_flags & EXT2_HASH_FLAG_INCOMPAT) &&
2756             fix_problem(ctx, PR_1_HTREE_INCOMPAT, pctx))
2757                 return 1;
2758
2759         pctx->num = root->indirect_levels;
2760         /* if htree level is clearly too high, consider it to be broken */
2761         if (root->indirect_levels > EXT4_HTREE_LEVEL &&
2762             fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2763                 return 1;
2764
2765         /* if level is only maybe too high, LARGE_DIR feature could be unset */
2766         if (root->indirect_levels > ext2_dir_htree_level(fs) &&
2767             !ext2fs_has_feature_largedir(fs->super)) {
2768                 int blockbits = EXT2_BLOCK_SIZE_BITS(fs->super) + 10;
2769                 unsigned idx_pb = 1 << (blockbits - 3);
2770
2771                 /* compare inode size/blocks vs. max-sized 2-level htree */
2772                 if (EXT2_I_SIZE(pctx->inode) <
2773                     (idx_pb - 1) * (idx_pb - 2) << blockbits &&
2774                     pctx->inode->i_blocks <
2775                     (idx_pb - 1) * (idx_pb - 2) << (blockbits - 9) &&
2776                     fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2777                         return 1;
2778         }
2779
2780         if (root->indirect_levels > EXT4_HTREE_LEVEL_COMPAT ||
2781             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
2782                 ctx->large_dirs++;
2783
2784         return 0;
2785 }
2786
2787 void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino,
2788                         struct ext2_inode *inode, int restart_flag,
2789                         const char *source)
2790 {
2791         inode->i_flags = 0;
2792         inode->i_links_count = 0;
2793         ext2fs_icount_store(ctx->inode_link_info, ino, 0);
2794         inode->i_dtime = ctx->now;
2795
2796         /*
2797          * If a special inode has such rotten block mappings that we
2798          * want to clear the whole inode, be sure to actually zap
2799          * the block maps because i_links_count isn't checked for
2800          * special inodes, and we'll end up right back here the next
2801          * time we run fsck.
2802          */
2803         if (ino < EXT2_FIRST_INODE(ctx->fs->super))
2804                 memset(inode->i_block, 0, sizeof(inode->i_block));
2805
2806         ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
2807         ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
2808         if (ctx->inode_reg_map)
2809                 ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
2810         if (ctx->inode_bad_map)
2811                 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
2812
2813         /*
2814          * If the inode was partially accounted for before processing
2815          * was aborted, we need to restart the pass 1 scan.
2816          */
2817         ctx->flags |= restart_flag;
2818
2819         if (ino == EXT2_BAD_INO)
2820                 memset(inode, 0, sizeof(struct ext2_inode));
2821
2822         e2fsck_write_inode(ctx, ino, inode, source);
2823 }
2824
2825 /*
2826  * Use the multiple-blocks reclamation code to fix alignment problems in
2827  * a bigalloc filesystem.  We want a logical cluster to map to *only* one
2828  * physical cluster, and we want the block offsets within that cluster to
2829  * line up.
2830  */
2831 static int has_unaligned_cluster_map(e2fsck_t ctx,
2832                                      blk64_t last_pblk, blk64_t last_lblk,
2833                                      blk64_t pblk, blk64_t lblk)
2834 {
2835         blk64_t cluster_mask;
2836
2837         if (!ctx->fs->cluster_ratio_bits)
2838                 return 0;
2839         cluster_mask = EXT2FS_CLUSTER_MASK(ctx->fs);
2840
2841         /*
2842          * If the block in the logical cluster doesn't align with the block in
2843          * the physical cluster...
2844          */
2845         if ((lblk & cluster_mask) != (pblk & cluster_mask))
2846                 return 1;
2847
2848         /*
2849          * If we cross a physical cluster boundary within a logical cluster...
2850          */
2851         if (last_pblk && (lblk & cluster_mask) != 0 &&
2852             EXT2FS_B2C(ctx->fs, lblk) == EXT2FS_B2C(ctx->fs, last_lblk) &&
2853             EXT2FS_B2C(ctx->fs, pblk) != EXT2FS_B2C(ctx->fs, last_pblk))
2854                 return 1;
2855
2856         return 0;
2857 }
2858
2859 static void scan_extent_node(e2fsck_t ctx, struct problem_context *pctx,
2860                              struct process_block_struct *pb,
2861                              blk64_t start_block, blk64_t end_block,
2862                              blk64_t eof_block,
2863                              ext2_extent_handle_t ehandle,
2864                              int try_repairs)
2865 {
2866         struct ext2fs_extent    extent;
2867         blk64_t                 blk, last_lblk;
2868         unsigned int            i, n;
2869         int                     is_dir, is_leaf;
2870         problem_t               problem;
2871         struct ext2_extent_info info;
2872         int                     failed_csum = 0;
2873
2874         if (pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID)
2875                 failed_csum = 1;
2876
2877         pctx->errcode = ext2fs_extent_get_info(ehandle, &info);
2878         if (pctx->errcode)
2879                 return;
2880         if (!(ctx->options & E2F_OPT_FIXES_ONLY) &&
2881             !pb->eti.force_rebuild &&
2882             info.curr_level < MAX_EXTENT_DEPTH_COUNT) {
2883                 struct extent_tree_level *etl;
2884
2885                 etl = pb->eti.ext_info + info.curr_level;
2886                 etl->num_extents += info.num_entries;
2887                 etl->max_extents += info.max_entries;
2888                 /*
2889                  * Implementation wart: Splitting extent blocks when appending
2890                  * will leave the old block with one free entry.  Therefore
2891                  * unless the node is totally full, pretend that a non-root
2892                  * extent block can hold one fewer entry than it actually does,
2893                  * so that we don't repeatedly rebuild the extent tree.
2894                  */
2895                 if (info.curr_level && info.num_entries < info.max_entries)
2896                         etl->max_extents--;
2897         }
2898
2899         pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_FIRST_SIB,
2900                                           &extent);
2901         while ((pctx->errcode == 0 ||
2902                 pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID) &&
2903                info.num_entries-- > 0) {
2904                 is_leaf = extent.e_flags & EXT2_EXTENT_FLAGS_LEAF;
2905                 is_dir = LINUX_S_ISDIR(pctx->inode->i_mode);
2906                 last_lblk = extent.e_lblk + extent.e_len - 1;
2907
2908                 problem = 0;
2909                 pctx->blk = extent.e_pblk;
2910                 pctx->blk2 = extent.e_lblk;
2911                 pctx->num = extent.e_len;
2912                 pctx->blkcount = extent.e_lblk + extent.e_len;
2913
2914                 if (extent.e_pblk == 0 ||
2915                     extent.e_pblk < ctx->fs->super->s_first_data_block ||
2916                     extent.e_pblk >= ext2fs_blocks_count(ctx->fs->super))
2917                         problem = PR_1_EXTENT_BAD_START_BLK;
2918                 else if (extent.e_lblk < start_block)
2919                         problem = PR_1_OUT_OF_ORDER_EXTENTS;
2920                 else if ((end_block && last_lblk > end_block) &&
2921                          !(last_lblk > eof_block &&
2922                            ((extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) ||
2923                             (pctx->inode->i_flags & EXT4_VERITY_FL))))
2924                         problem = PR_1_EXTENT_END_OUT_OF_BOUNDS;
2925                 else if (is_leaf && extent.e_len == 0)
2926                         problem = PR_1_EXTENT_LENGTH_ZERO;
2927                 else if (is_leaf &&
2928                          (extent.e_pblk + extent.e_len) >
2929                          ext2fs_blocks_count(ctx->fs->super))
2930                         problem = PR_1_EXTENT_ENDS_BEYOND;
2931                 else if (is_leaf && is_dir && !pctx->inode->i_size_high &&
2932                          !ext2fs_has_feature_largedir(ctx->fs->super) &&
2933                          ((extent.e_lblk + extent.e_len) >
2934                           (1U << (21 - ctx->fs->super->s_log_block_size))))
2935                         problem = PR_1_TOOBIG_DIR;
2936
2937                 if (is_leaf && problem == 0 && extent.e_len > 0) {
2938 #if 0
2939                         printf("extent_region(ino=%u, expect=%llu, "
2940                                "lblk=%llu, len=%u)\n", pb->ino,
2941                                (unsigned long long) pb->next_lblock,
2942                                (unsigned long long) extent.e_lblk,
2943                                extent.e_len);
2944 #endif
2945                         if (extent.e_lblk < pb->next_lblock)
2946                                 problem = PR_1_EXTENT_COLLISION;
2947                         else if (extent.e_lblk + extent.e_len > pb->next_lblock)
2948                                 pb->next_lblock = extent.e_lblk + extent.e_len;
2949                 }
2950
2951                 /*
2952                  * Uninitialized blocks in a directory?  Clear the flag and
2953                  * we'll interpret the blocks later.
2954                  */
2955                 if (try_repairs && is_dir && problem == 0 &&
2956                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
2957                     fix_problem(ctx, PR_1_UNINIT_DBLOCK, pctx)) {
2958                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
2959                         pb->inode_modified = 1;
2960                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
2961                                                               &extent);
2962                         if (pctx->errcode)
2963                                 return;
2964                         failed_csum = 0;
2965                 }
2966 #ifdef CONFIG_DEVELOPER_FEATURES
2967                 if (try_repairs && !is_dir && problem == 0 &&
2968                     (ctx->options & E2F_OPT_CLEAR_UNINIT) &&
2969                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
2970                     fix_problem(ctx, PR_1_CLEAR_UNINIT_EXTENT, pctx)) {
2971                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
2972                         pb->inode_modified = 1;
2973                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
2974                                                               &extent);
2975                         if (pctx->errcode)
2976                                 return;
2977                         failed_csum = 0;
2978                 }
2979 #endif
2980                 if (try_repairs && problem) {
2981 report_problem:
2982                         if (fix_problem(ctx, problem, pctx)) {
2983                                 if (ctx->invalid_bitmaps) {
2984                                         /*
2985                                          * If fsck knows the bitmaps are bad,
2986                                          * skip to the next extent and
2987                                          * try to clear this extent again
2988                                          * after fixing the bitmaps, by
2989                                          * restarting fsck.
2990                                          */
2991                                         pctx->errcode = ext2fs_extent_get(
2992                                                           ehandle,
2993                                                           EXT2_EXTENT_NEXT_SIB,
2994                                                           &extent);
2995                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
2996                                         if (pctx->errcode ==
2997                                                     EXT2_ET_NO_CURRENT_NODE) {
2998                                                 pctx->errcode = 0;
2999                                                 break;
3000                                         }
3001                                         continue;
3002                                 }
3003                                 e2fsck_read_bitmaps(ctx);
3004                                 pb->inode_modified = 1;
3005                                 pctx->errcode =
3006                                         ext2fs_extent_delete(ehandle, 0);
3007                                 if (pctx->errcode) {
3008                                         pctx->str = "ext2fs_extent_delete";
3009                                         return;
3010                                 }
3011                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3012                                 if (pctx->errcode &&
3013                                     pctx->errcode != EXT2_ET_NO_CURRENT_NODE) {
3014                                         pctx->str = "ext2fs_extent_fix_parents";
3015                                         return;
3016                                 }
3017                                 pctx->errcode = ext2fs_extent_get(ehandle,
3018                                                                   EXT2_EXTENT_CURRENT,
3019                                                                   &extent);
3020                                 if (pctx->errcode == EXT2_ET_NO_CURRENT_NODE) {
3021                                         pctx->errcode = 0;
3022                                         break;
3023                                 }
3024                                 failed_csum = 0;
3025                                 continue;
3026                         }
3027                         goto next;
3028                 }
3029
3030                 if (!is_leaf) {
3031                         blk64_t lblk = extent.e_lblk;
3032                         int next_try_repairs = 1;
3033
3034                         blk = extent.e_pblk;
3035
3036                         /*
3037                          * If this lower extent block collides with critical
3038                          * metadata, don't try to repair the damage.  Pass 1b
3039                          * will reallocate the block; then we can try again.
3040                          */
3041                         if (pb->ino != EXT2_RESIZE_INO &&
3042                             extent.e_pblk < ctx->fs->super->s_blocks_count &&
3043                             ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3044                                                       extent.e_pblk)) {
3045                                 next_try_repairs = 0;
3046                                 pctx->blk = blk;
3047                                 fix_problem(ctx,
3048                                             PR_1_CRITICAL_METADATA_COLLISION,
3049                                             pctx);
3050                                 if ((ctx->options & E2F_OPT_NO) == 0)
3051                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3052                         }
3053                         pctx->errcode = ext2fs_extent_get(ehandle,
3054                                                   EXT2_EXTENT_DOWN, &extent);
3055                         if (pctx->errcode &&
3056                             pctx->errcode != EXT2_ET_EXTENT_CSUM_INVALID) {
3057                                 pctx->str = "EXT2_EXTENT_DOWN";
3058                                 problem = PR_1_EXTENT_HEADER_INVALID;
3059                                 if (!next_try_repairs)
3060                                         return;
3061                                 if (pctx->errcode == EXT2_ET_EXTENT_HEADER_BAD)
3062                                         goto report_problem;
3063                                 return;
3064                         }
3065                         /* The next extent should match this index's logical start */
3066                         if (extent.e_lblk != lblk) {
3067                                 struct ext2_extent_info e_info;
3068
3069                                 pctx->errcode = ext2fs_extent_get_info(ehandle,
3070                                                                        &e_info);
3071                                 if (pctx->errcode) {
3072                                         pctx->str = "ext2fs_extent_get_info";
3073                                         return;
3074                                 }
3075                                 pctx->blk = lblk;
3076                                 pctx->blk2 = extent.e_lblk;
3077                                 pctx->num = e_info.curr_level - 1;
3078                                 problem = PR_1_EXTENT_INDEX_START_INVALID;
3079                                 if (fix_problem(ctx, problem, pctx)) {
3080                                         pb->inode_modified = 1;
3081                                         pctx->errcode =
3082                                                 ext2fs_extent_fix_parents(ehandle);
3083                                         if (pctx->errcode) {
3084                                                 pctx->str = "ext2fs_extent_fix_parents";
3085                                                 return;
3086                                         }
3087                                 }
3088                         }
3089                         scan_extent_node(ctx, pctx, pb, extent.e_lblk,
3090                                          last_lblk, eof_block, ehandle,
3091                                          next_try_repairs);
3092                         if (pctx->errcode)
3093                                 return;
3094                         pctx->errcode = ext2fs_extent_get(ehandle,
3095                                                   EXT2_EXTENT_UP, &extent);
3096                         if (pctx->errcode) {
3097                                 pctx->str = "EXT2_EXTENT_UP";
3098                                 return;
3099                         }
3100                         mark_block_used(ctx, blk);
3101                         pb->num_blocks++;
3102                         goto next;
3103                 }
3104
3105                 if ((pb->previous_block != 0) &&
3106                     (pb->previous_block+1 != extent.e_pblk)) {
3107                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3108                                 char type = '?';
3109
3110                                 if (pb->is_dir)
3111                                         type = 'd';
3112                                 else if (pb->is_reg)
3113                                         type = 'f';
3114
3115                                 printf(("%6lu(%c): expecting %6lu "
3116                                         "actual extent "
3117                                         "phys %6lu log %lu len %lu\n"),
3118                                        (unsigned long) pctx->ino, type,
3119                                        (unsigned long) pb->previous_block+1,
3120                                        (unsigned long) extent.e_pblk,
3121                                        (unsigned long) extent.e_lblk,
3122                                        (unsigned long) extent.e_len);
3123                         }
3124                         pb->fragmented = 1;
3125                 }
3126                 /*
3127                  * If we notice a gap in the logical block mappings of an
3128                  * extent-mapped directory, offer to close the hole by
3129                  * moving the logical block down, otherwise we'll go mad in
3130                  * pass 3 allocating empty directory blocks to fill the hole.
3131                  */
3132                 if (try_repairs && is_dir &&
3133                     pb->last_block + 1 < extent.e_lblk) {
3134                         blk64_t new_lblk;
3135
3136                         new_lblk = pb->last_block + 1;
3137                         if (EXT2FS_CLUSTER_RATIO(ctx->fs) > 1)
3138                                 new_lblk = ((new_lblk +
3139                                              EXT2FS_CLUSTER_RATIO(ctx->fs) - 1) &
3140                                             ~EXT2FS_CLUSTER_MASK(ctx->fs)) |
3141                                            (extent.e_pblk &
3142                                             EXT2FS_CLUSTER_MASK(ctx->fs));
3143                         pctx->blk = extent.e_lblk;
3144                         pctx->blk2 = new_lblk;
3145                         if (fix_problem(ctx, PR_1_COLLAPSE_DBLOCK, pctx)) {
3146                                 extent.e_lblk = new_lblk;
3147                                 pb->inode_modified = 1;
3148                                 pctx->errcode = ext2fs_extent_replace(ehandle,
3149                                                                 0, &extent);
3150                                 if (pctx->errcode) {
3151                                         pctx->errcode = 0;
3152                                         goto alloc_later;
3153                                 }
3154                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3155                                 if (pctx->errcode)
3156                                         goto failed_add_dir_block;
3157                                 pctx->errcode = ext2fs_extent_goto(ehandle,
3158                                                                 extent.e_lblk);
3159                                 if (pctx->errcode)
3160                                         goto failed_add_dir_block;
3161                                 last_lblk = extent.e_lblk + extent.e_len - 1;
3162                                 failed_csum = 0;
3163                         }
3164                 }
3165 alloc_later:
3166                 if (is_dir) {
3167                         while (++pb->last_db_block <
3168                                (e2_blkcnt_t) extent.e_lblk) {
3169                                 pctx->errcode = ext2fs_add_dir_block2(
3170                                                         ctx->fs->dblist,
3171                                                         pb->ino, 0,
3172                                                         pb->last_db_block);
3173                                 if (pctx->errcode) {
3174                                         pctx->blk = 0;
3175                                         pctx->num = pb->last_db_block;
3176                                         goto failed_add_dir_block;
3177                                 }
3178                         }
3179
3180                         for (i = 0; i < extent.e_len; i++) {
3181                                 pctx->errcode = ext2fs_add_dir_block2(
3182                                                         ctx->fs->dblist,
3183                                                         pctx->ino,
3184                                                         extent.e_pblk + i,
3185                                                         extent.e_lblk + i);
3186                                 if (pctx->errcode) {
3187                                         pctx->blk = extent.e_pblk + i;
3188                                         pctx->num = extent.e_lblk + i;
3189                                 failed_add_dir_block:
3190                                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3191                                         /* Should never get here */
3192                                         ctx->flags |= E2F_FLAG_ABORT;
3193                                         return;
3194                                 }
3195                         }
3196                         if (extent.e_len > 0)
3197                                 pb->last_db_block = extent.e_lblk + extent.e_len - 1;
3198                 }
3199                 if (has_unaligned_cluster_map(ctx, pb->previous_block,
3200                                               pb->last_block,
3201                                               extent.e_pblk,
3202                                               extent.e_lblk)) {
3203                         for (i = 0; i < extent.e_len; i++) {
3204                                 pctx->blk = extent.e_lblk + i;
3205                                 pctx->blk2 = extent.e_pblk + i;
3206                                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3207                                 mark_block_used(ctx, extent.e_pblk + i);
3208                                 mark_block_used(ctx, extent.e_pblk + i);
3209                         }
3210                 }
3211
3212                 /*
3213                  * Check whether first cluster got marked in previous iteration.
3214                  */
3215                 if (ctx->fs->cluster_ratio_bits &&
3216                     pb->previous_block &&
3217                     (EXT2FS_B2C(ctx->fs, extent.e_pblk) ==
3218                      EXT2FS_B2C(ctx->fs, pb->previous_block)))
3219                         /* Set blk to the beginning of next cluster. */
3220                         blk = EXT2FS_C2B(
3221                                 ctx->fs,
3222                                 EXT2FS_B2C(ctx->fs, extent.e_pblk) + 1);
3223                 else
3224                         /* Set blk to the beginning of current cluster. */
3225                         blk = EXT2FS_C2B(ctx->fs,
3226                                          EXT2FS_B2C(ctx->fs, extent.e_pblk));
3227
3228                 if (blk < extent.e_pblk + extent.e_len) {
3229                         mark_blocks_used(ctx, blk,
3230                                          extent.e_pblk + extent.e_len - blk);
3231                         n = DIV_ROUND_UP(extent.e_pblk + extent.e_len - blk,
3232                                          EXT2FS_CLUSTER_RATIO(ctx->fs));
3233                         pb->num_blocks += n;
3234                 }
3235                 pb->last_block = extent.e_lblk + extent.e_len - 1;
3236                 pb->previous_block = extent.e_pblk + extent.e_len - 1;
3237                 start_block = pb->last_block = last_lblk;
3238                 if (is_leaf && !is_dir &&
3239                     !(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT))
3240                         pb->last_init_lblock = last_lblk;
3241         next:
3242                 pctx->errcode = ext2fs_extent_get(ehandle,
3243                                                   EXT2_EXTENT_NEXT_SIB,
3244                                                   &extent);
3245         }
3246
3247         /* Failed csum but passes checks?  Ask to fix checksum. */
3248         if (failed_csum &&
3249             fix_problem(ctx, PR_1_EXTENT_ONLY_CSUM_INVALID, pctx)) {
3250                 pb->inode_modified = 1;
3251                 pctx->errcode = ext2fs_extent_replace(ehandle, 0, &extent);
3252                 if (pctx->errcode)
3253                         return;
3254         }
3255
3256         if (pctx->errcode == EXT2_ET_EXTENT_NO_NEXT)
3257                 pctx->errcode = 0;
3258 }
3259
3260 static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx,
3261                                  struct process_block_struct *pb)
3262 {
3263         struct ext2_extent_info info;
3264         struct ext2_inode       *inode = pctx->inode;
3265         ext2_extent_handle_t    ehandle;
3266         ext2_filsys             fs = ctx->fs;
3267         ext2_ino_t              ino = pctx->ino;
3268         errcode_t               retval;
3269         blk64_t                 eof_lblk;
3270         struct ext3_extent_header       *eh;
3271
3272         /* Check for a proper extent header... */
3273         eh = (struct ext3_extent_header *) &inode->i_block[0];
3274         retval = ext2fs_extent_header_verify(eh, sizeof(inode->i_block));
3275         if (retval) {
3276                 if (fix_problem(ctx, PR_1_MISSING_EXTENT_HEADER, pctx))
3277                         e2fsck_clear_inode(ctx, ino, inode, 0,
3278                                            "check_blocks_extents");
3279                 pctx->errcode = 0;
3280                 return;
3281         }
3282
3283         /* ...since this function doesn't fail if i_block is zeroed. */
3284         pctx->errcode = ext2fs_extent_open2(fs, ino, inode, &ehandle);
3285         if (pctx->errcode) {
3286                 if (fix_problem(ctx, PR_1_READ_EXTENT, pctx))
3287                         e2fsck_clear_inode(ctx, ino, inode, 0,
3288                                            "check_blocks_extents");
3289                 pctx->errcode = 0;
3290                 return;
3291         }
3292
3293         retval = ext2fs_extent_get_info(ehandle, &info);
3294         if (retval == 0) {
3295                 int max_depth = info.max_depth;
3296
3297                 if (max_depth >= MAX_EXTENT_DEPTH_COUNT)
3298                         max_depth = MAX_EXTENT_DEPTH_COUNT-1;
3299                 ctx->extent_depth_count[max_depth]++;
3300         }
3301
3302         /* Check maximum extent depth */
3303         pctx->blk = info.max_depth;
3304         pctx->blk2 = ext2fs_max_extent_depth(ehandle);
3305         if (pctx->blk2 < pctx->blk &&
3306             fix_problem(ctx, PR_1_EXTENT_BAD_MAX_DEPTH, pctx))
3307                 pb->eti.force_rebuild = 1;
3308
3309         /* Can we collect extent tree level stats? */
3310         pctx->blk = MAX_EXTENT_DEPTH_COUNT;
3311         if (pctx->blk2 > pctx->blk)
3312                 fix_problem(ctx, PR_1E_MAX_EXTENT_TREE_DEPTH, pctx);
3313         memset(pb->eti.ext_info, 0, sizeof(pb->eti.ext_info));
3314         pb->eti.ino = pb->ino;
3315
3316         pb->next_lblock = 0;
3317
3318         eof_lblk = ((EXT2_I_SIZE(inode) + fs->blocksize - 1) >>
3319                 EXT2_BLOCK_SIZE_BITS(fs->super)) - 1;
3320         scan_extent_node(ctx, pctx, pb, 0, 0, eof_lblk, ehandle, 1);
3321         if (pctx->errcode &&
3322             fix_problem(ctx, PR_1_EXTENT_ITERATE_FAILURE, pctx)) {
3323                 pb->num_blocks = 0;
3324                 inode->i_blocks = 0;
3325                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3326                                    "check_blocks_extents");
3327                 pctx->errcode = 0;
3328         }
3329         ext2fs_extent_free(ehandle);
3330
3331         /* Rebuild unless it's a dir and we're rehashing it */
3332         if (LINUX_S_ISDIR(inode->i_mode) &&
3333             e2fsck_dir_will_be_rehashed(ctx, ino))
3334                 return;
3335
3336         if (ctx->options & E2F_OPT_CONVERT_BMAP)
3337                 e2fsck_rebuild_extents_later(ctx, ino);
3338         else
3339                 e2fsck_should_rebuild_extents(ctx, pctx, &pb->eti, &info);
3340 }
3341
3342 /*
3343  * In fact we don't need to check blocks for an inode with inline data
3344  * because this inode doesn't have any blocks.  In this function all
3345  * we need to do is add this inode into dblist when it is a directory.
3346  */
3347 static void check_blocks_inline_data(e2fsck_t ctx, struct problem_context *pctx,
3348                                      struct process_block_struct *pb)
3349 {
3350         int     flags;
3351         size_t  inline_data_size = 0;
3352
3353         if (!pb->is_dir) {
3354                 pctx->errcode = 0;
3355                 return;
3356         }
3357
3358         /* Process the dirents in i_block[] as the "first" block. */
3359         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 0);
3360         if (pctx->errcode)
3361                 goto err;
3362
3363         /* Process the dirents in the EA as a "second" block. */
3364         flags = ctx->fs->flags;
3365         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3366         pctx->errcode = ext2fs_inline_data_size(ctx->fs, pb->ino,
3367                                                 &inline_data_size);
3368         ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3369                          (ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3370         if (pctx->errcode) {
3371                 pctx->errcode = 0;
3372                 return;
3373         }
3374
3375         if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE)
3376                 return;
3377
3378         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 1);
3379         if (pctx->errcode)
3380                 goto err;
3381
3382         return;
3383 err:
3384         pctx->blk = 0;
3385         pctx->num = 0;
3386         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3387         ctx->flags |= E2F_FLAG_ABORT;
3388 }
3389
3390 /*
3391  * This subroutine is called on each inode to account for all of the
3392  * blocks used by that inode.
3393  */
3394 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
3395                          char *block_buf, const struct ea_quota *ea_ibody_quota)
3396 {
3397         ext2_filsys fs = ctx->fs;
3398         struct process_block_struct pb;
3399         ext2_ino_t      ino = pctx->ino;
3400         struct ext2_inode *inode = pctx->inode;
3401         unsigned        bad_size = 0;
3402         int             dirty_inode = 0;
3403         int             extent_fs;
3404         int             inlinedata_fs;
3405         __u64           size;
3406         struct ea_quota ea_block_quota;
3407
3408         pb.ino = ino;
3409         pb.num_blocks = EXT2FS_B2C(ctx->fs,
3410                                    ea_ibody_quota ? ea_ibody_quota->blocks : 0);
3411         pb.last_block = ~0;
3412         pb.last_init_lblock = -1;
3413         pb.last_db_block = -1;
3414         pb.num_illegal_blocks = 0;
3415         pb.suppress = 0; pb.clear = 0;
3416         pb.fragmented = 0;
3417         pb.compressed = 0;
3418         pb.previous_block = 0;
3419         pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
3420         pb.is_reg = LINUX_S_ISREG(inode->i_mode);
3421         pb.max_blocks = 1U << (31 - fs->super->s_log_block_size);
3422         pb.inode = inode;
3423         pb.pctx = pctx;
3424         pb.ctx = ctx;
3425         pb.inode_modified = 0;
3426         pb.eti.force_rebuild = 0;
3427         pctx->ino = ino;
3428         pctx->errcode = 0;
3429
3430         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
3431         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
3432
3433         if (check_ext_attr(ctx, pctx, block_buf, &ea_block_quota)) {
3434                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3435                         goto out;
3436                 pb.num_blocks += EXT2FS_B2C(ctx->fs, ea_block_quota.blocks);
3437         }
3438
3439         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL))
3440                 check_blocks_inline_data(ctx, pctx, &pb);
3441         else if (ext2fs_inode_has_valid_blocks2(fs, inode)) {
3442                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL))
3443                         check_blocks_extents(ctx, pctx, &pb);
3444                 else {
3445                         int flags;
3446                         /*
3447                          * If we've modified the inode, write it out before
3448                          * iterate() tries to use it.
3449                          */
3450                         if (dirty_inode) {
3451                                 e2fsck_write_inode(ctx, ino, inode,
3452                                                    "check_blocks");
3453                                 dirty_inode = 0;
3454                         }
3455                         flags = fs->flags;
3456                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3457                         pctx->errcode = ext2fs_block_iterate3(fs, ino,
3458                                                 pb.is_dir ? BLOCK_FLAG_HOLE : 0,
3459                                                 block_buf, process_block, &pb);
3460                         /*
3461                          * We do not have uninitialized extents in non extent
3462                          * files.
3463                          */
3464                         pb.last_init_lblock = pb.last_block;
3465                         /*
3466                          * If iterate() changed a block mapping, we have to
3467                          * re-read the inode.  If we decide to clear the
3468                          * inode after clearing some stuff, we'll re-write the
3469                          * bad mappings into the inode!
3470                          */
3471                         if (pb.inode_modified)
3472                                 e2fsck_read_inode(ctx, ino, inode,
3473                                                   "check_blocks");
3474                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3475                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3476
3477                         if (ctx->options & E2F_OPT_CONVERT_BMAP) {
3478 #ifdef DEBUG
3479                                 printf("bmap rebuild ino=%d\n", ino);
3480 #endif
3481                                 if (!LINUX_S_ISDIR(inode->i_mode) ||
3482                                     !e2fsck_dir_will_be_rehashed(ctx, ino))
3483                                         e2fsck_rebuild_extents_later(ctx, ino);
3484                         }
3485                 }
3486         }
3487         end_problem_latch(ctx, PR_LATCH_BLOCK);
3488         end_problem_latch(ctx, PR_LATCH_TOOBIG);
3489         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3490                 goto out;
3491         if (pctx->errcode)
3492                 fix_problem(ctx, PR_1_BLOCK_ITERATE, pctx);
3493
3494         if (pb.fragmented && pb.num_blocks < fs->super->s_blocks_per_group) {
3495                 if (LINUX_S_ISDIR(inode->i_mode))
3496                         ctx->fs_fragmented_dir++;
3497                 else
3498                         ctx->fs_fragmented++;
3499         }
3500
3501         if (pb.clear) {
3502                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3503                                    "check_blocks");
3504                 return;
3505         }
3506
3507         if (inode->i_flags & EXT2_INDEX_FL) {
3508                 if (handle_htree(ctx, pctx, ino, inode, block_buf)) {
3509                         inode->i_flags &= ~EXT2_INDEX_FL;
3510                         dirty_inode++;
3511                 } else {
3512                         e2fsck_add_dx_dir(ctx, ino, inode, pb.last_block+1);
3513                 }
3514         }
3515
3516         if (!pb.num_blocks && pb.is_dir &&
3517             !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
3518                 if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) {
3519                         e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks");
3520                         ctx->fs_directory_count--;
3521                         return;
3522                 }
3523         }
3524
3525         if (ino != quota_type2inum(PRJQUOTA, fs->super) &&
3526             ino != fs->super->s_orphan_file_inum &&
3527             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super)) &&
3528             !(inode->i_flags & EXT4_EA_INODE_FL)) {
3529                 quota_data_add(ctx->qctx, (struct ext2_inode_large *) inode,
3530                                ino,
3531                                pb.num_blocks * EXT2_CLUSTER_SIZE(fs->super));
3532                 quota_data_inodes(ctx->qctx, (struct ext2_inode_large *) inode,
3533                                   ino, (ea_ibody_quota ?
3534                                         ea_ibody_quota->inodes : 0) +
3535                                                 ea_block_quota.inodes + 1);
3536         }
3537
3538         if (!ext2fs_has_feature_huge_file(fs->super) ||
3539             !(inode->i_flags & EXT4_HUGE_FILE_FL))
3540                 pb.num_blocks *= (fs->blocksize / 512);
3541         pb.num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
3542 #if 0
3543         printf("inode %u, i_size = %u, last_block = %llu, i_blocks=%llu, num_blocks = %llu\n",
3544                ino, inode->i_size, (unsigned long long) pb.last_block,
3545                (unsigned long long) ext2fs_inode_i_blocks(fs, inode),
3546                (unsigned long long) pb.num_blocks);
3547 #endif
3548         size = EXT2_I_SIZE(inode);
3549         if (pb.is_dir) {
3550                 unsigned nblock = size >> EXT2_BLOCK_SIZE_BITS(fs->super);
3551                 if (inode->i_flags & EXT4_INLINE_DATA_FL) {
3552                         int flags;
3553                         size_t sz = 0;
3554                         errcode_t err;
3555
3556                         flags = ctx->fs->flags;
3557                         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3558                         err = ext2fs_inline_data_size(ctx->fs, pctx->ino,
3559                                                       &sz);
3560                         ctx->fs->flags = (flags &
3561                                           EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3562                                          (ctx->fs->flags &
3563                                           ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3564                         if (err || sz != size) {
3565                                 bad_size = 7;
3566                                 pctx->num = sz;
3567                         }
3568                 } else if (size & (fs->blocksize - 1))
3569                         bad_size = 5;
3570                 else if (nblock > (pb.last_block + 1))
3571                         bad_size = 1;
3572                 else if (nblock < (pb.last_block + 1)) {
3573                         if (((pb.last_block + 1) - nblock) >
3574                             fs->super->s_prealloc_dir_blocks)
3575                                 bad_size = 2;
3576                 }
3577         } else {
3578                 if ((pb.last_init_lblock >= 0) &&
3579                     /* Do not allow initialized allocated blocks past i_size*/
3580                     (size < (__u64)pb.last_init_lblock * fs->blocksize) &&
3581                     !(inode->i_flags & EXT4_VERITY_FL))
3582                         bad_size = 3;
3583                 else if (!(extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3584                          size > ext2_max_sizes[fs->super->s_log_block_size])
3585                         /* too big for a direct/indirect-mapped file */
3586                         bad_size = 4;
3587                 else if ((extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3588                          size >
3589                          ((1ULL << (32 + EXT2_BLOCK_SIZE_BITS(fs->super))) - 1))
3590                         /* too big for an extent-based file - 32bit ee_block */
3591                         bad_size = 6;
3592         }
3593         /* i_size for symlinks is checked elsewhere */
3594         if (bad_size && !LINUX_S_ISLNK(inode->i_mode)) {
3595                 /* Did inline_data set pctx->num earlier? */
3596                 if (bad_size != 7)
3597                         pctx->num = (pb.last_block + 1) * fs->blocksize;
3598                 pctx->group = bad_size;
3599                 if (fix_problem(ctx, PR_1_BAD_I_SIZE, pctx)) {
3600                         ext2fs_inode_size_set(fs, inode, pctx->num);
3601                         if (EXT2_I_SIZE(inode) == 0 &&
3602                             (inode->i_flags & EXT4_INLINE_DATA_FL)) {
3603                                 memset(inode->i_block, 0,
3604                                        sizeof(inode->i_block));
3605                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
3606                         }
3607                         dirty_inode++;
3608                 }
3609                 pctx->num = 0;
3610         }
3611         if (LINUX_S_ISREG(inode->i_mode) &&
3612             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
3613                 ctx->large_files++;
3614         if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
3615             ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) ||
3616              (ext2fs_has_feature_huge_file(fs->super) &&
3617               (inode->i_flags & EXT4_HUGE_FILE_FL) &&
3618               (inode->osd2.linux2.l_i_blocks_hi != 0)))) {
3619                 pctx->num = pb.num_blocks;
3620                 if (fix_problem(ctx, PR_1_BAD_I_BLOCKS, pctx)) {
3621                         inode->i_blocks = pb.num_blocks;
3622                         inode->osd2.linux2.l_i_blocks_hi = pb.num_blocks >> 32;
3623                         dirty_inode++;
3624                 }
3625                 pctx->num = 0;
3626         }
3627
3628         /*
3629          * The kernel gets mad if we ask it to allocate bigalloc clusters to
3630          * a block mapped file, so rebuild it as an extent file.  We can skip
3631          * symlinks because they're never rewritten.
3632          */
3633         if (ext2fs_has_feature_bigalloc(fs->super) &&
3634             (LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode)) &&
3635             ext2fs_inode_data_blocks2(fs, inode) > 0 &&
3636             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INO(fs->super)) &&
3637             !(inode->i_flags & (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)) &&
3638             fix_problem(ctx, PR_1_NO_BIGALLOC_BLOCKMAP_FILES, pctx)) {
3639                 pctx->errcode = e2fsck_rebuild_extents_later(ctx, ino);
3640                 if (pctx->errcode)
3641                         goto out;
3642         }
3643
3644         if (ctx->dirs_to_hash && pb.is_dir &&
3645             !(ctx->lost_and_found && ctx->lost_and_found == ino) &&
3646             !(inode->i_flags & EXT2_INDEX_FL) &&
3647             ((inode->i_size / fs->blocksize) >= 3))
3648                 e2fsck_rehash_dir_later(ctx, ino);
3649
3650 out:
3651         if (dirty_inode)
3652                 e2fsck_write_inode(ctx, ino, inode, "check_blocks");
3653 }
3654
3655 #if 0
3656 /*
3657  * Helper function called by process block when an illegal block is
3658  * found.  It returns a description about why the block is illegal
3659  */
3660 static char *describe_illegal_block(ext2_filsys fs, blk64_t block)
3661 {
3662         blk64_t super;
3663         int     i;
3664         static char     problem[80];
3665
3666         super = fs->super->s_first_data_block;
3667         strcpy(problem, "PROGRAMMING ERROR: Unknown reason for illegal block");
3668         if (block < super) {
3669                 sprintf(problem, "< FIRSTBLOCK (%u)", super);
3670                 return(problem);
3671         } else if (block >= ext2fs_blocks_count(fs->super)) {
3672                 sprintf(problem, "> BLOCKS (%u)", ext2fs_blocks_count(fs->super));
3673                 return(problem);
3674         }
3675         for (i = 0; i < fs->group_desc_count; i++) {
3676                 if (block == super) {
3677                         sprintf(problem, "is the superblock in group %d", i);
3678                         break;
3679                 }
3680                 if (block > super &&
3681                     block <= (super + fs->desc_blocks)) {
3682                         sprintf(problem, "is in the group descriptors "
3683                                 "of group %d", i);
3684                         break;
3685                 }
3686                 if (block == ext2fs_block_bitmap_loc(fs, i)) {
3687                         sprintf(problem, "is the block bitmap of group %d", i);
3688                         break;
3689                 }
3690                 if (block == ext2fs_inode_bitmap_loc(fs, i)) {
3691                         sprintf(problem, "is the inode bitmap of group %d", i);
3692                         break;
3693                 }
3694                 if (block >= ext2fs_inode_table_loc(fs, i) &&
3695                     (block < ext2fs_inode_table_loc(fs, i)
3696                      + fs->inode_blocks_per_group)) {
3697                         sprintf(problem, "is in the inode table of group %d",
3698                                 i);
3699                         break;
3700                 }
3701                 super += fs->super->s_blocks_per_group;
3702         }
3703         return(problem);
3704 }
3705 #endif
3706
3707 /*
3708  * This is a helper function for check_blocks().
3709  */
3710 static int process_block(ext2_filsys fs,
3711                   blk64_t       *block_nr,
3712                   e2_blkcnt_t blockcnt,
3713                   blk64_t ref_block EXT2FS_ATTR((unused)),
3714                   int ref_offset EXT2FS_ATTR((unused)),
3715                   void *priv_data)
3716 {
3717         struct process_block_struct *p;
3718         struct problem_context *pctx;
3719         blk64_t blk = *block_nr;
3720         int     ret_code = 0;
3721         problem_t       problem = 0;
3722         e2fsck_t        ctx;
3723
3724         p = (struct process_block_struct *) priv_data;
3725         pctx = p->pctx;
3726         ctx = p->ctx;
3727
3728         /*
3729          * For a directory, add logical block zero for processing even if it's
3730          * not mapped or we'll be perennially stuck with broken "." and ".."
3731          * entries.
3732          */
3733         if (p->is_dir && blockcnt == 0 && blk == 0) {
3734                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino, 0, 0);
3735                 if (pctx->errcode) {
3736                         pctx->blk = blk;
3737                         pctx->num = blockcnt;
3738                         goto failed_add_dir_block;
3739                 }
3740                 p->last_db_block++;
3741         }
3742
3743         if (blk == 0)
3744                 return 0;
3745
3746 #if 0
3747         printf("Process_block, inode %lu, block %u, #%d\n", p->ino, blk,
3748                blockcnt);
3749 #endif
3750
3751         /*
3752          * Simplistic fragmentation check.  We merely require that the
3753          * file be contiguous.  (Which can never be true for really
3754          * big files that are greater than a block group.)
3755          */
3756         if (p->previous_block && p->ino != EXT2_RESIZE_INO) {
3757                 if (p->previous_block+1 != blk) {
3758                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3759                                 char type = '?';
3760
3761                                 if (p->is_dir)
3762                                         type = 'd';
3763                                 else if (p->is_reg)
3764                                         type = 'f';
3765
3766                                 printf(_("%6lu(%c): expecting %6lu "
3767                                          "got phys %6lu (blkcnt %lld)\n"),
3768                                        (unsigned long) pctx->ino, type,
3769                                        (unsigned long) p->previous_block+1,
3770                                        (unsigned long) blk,
3771                                        (long long) blockcnt);
3772                         }
3773                         p->fragmented = 1;
3774                 }
3775         }
3776
3777         if (p->is_dir && !ext2fs_has_feature_largedir(fs->super) &&
3778             !pctx->inode->i_size_high &&
3779             blockcnt > (1 << (21 - fs->super->s_log_block_size)))
3780                 problem = PR_1_TOOBIG_DIR;
3781         if (p->is_dir && p->num_blocks + 1 >= p->max_blocks)
3782                 problem = PR_1_TOOBIG_DIR;
3783         if (p->is_reg && p->num_blocks + 1 >= p->max_blocks)
3784                 problem = PR_1_TOOBIG_REG;
3785         if (!p->is_dir && !p->is_reg && blockcnt > 0)
3786                 problem = PR_1_TOOBIG_SYMLINK;
3787
3788         if (blk < fs->super->s_first_data_block ||
3789             blk >= ext2fs_blocks_count(fs->super))
3790                 problem = PR_1_ILLEGAL_BLOCK_NUM;
3791
3792         /*
3793          * If this IND/DIND/TIND block is squatting atop some critical metadata
3794          * (group descriptors, superblock, bitmap, inode table), any write to
3795          * "fix" mapping problems will destroy the metadata.  We'll let pass 1b
3796          * fix that and restart fsck.
3797          */
3798         if (blockcnt < 0 &&
3799             p->ino != EXT2_RESIZE_INO &&
3800             blk < ctx->fs->super->s_blocks_count &&
3801             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk)) {
3802                 pctx->blk = blk;
3803                 fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx);
3804                 if ((ctx->options & E2F_OPT_NO) == 0)
3805                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3806         }
3807
3808         if (problem) {
3809                 p->num_illegal_blocks++;
3810                 /*
3811                  * A bit of subterfuge here -- we're trying to fix a block
3812                  * mapping, but the IND/DIND/TIND block could have collided
3813                  * with some critical metadata.  So, fix the in-core mapping so
3814                  * iterate won't go insane, but return 0 instead of
3815                  * BLOCK_CHANGED so that it won't write the remapping out to
3816                  * our multiply linked block.
3817                  *
3818                  * Even if we previously determined that an *IND block
3819                  * conflicts with critical metadata, we must still try to
3820                  * iterate the *IND block as if it is an *IND block to find and
3821                  * mark the blocks it points to.  Better to be overly cautious
3822                  * with the used_blocks map so that we don't move the *IND
3823                  * block to a block that's really in use!
3824                  */
3825                 if (p->ino != EXT2_RESIZE_INO &&
3826                     ref_block != 0 &&
3827                     ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3828                                               ref_block)) {
3829                         *block_nr = 0;
3830                         return 0;
3831                 }
3832                 if (!p->suppress && (p->num_illegal_blocks % 12) == 0) {
3833                         if (fix_problem(ctx, PR_1_TOO_MANY_BAD_BLOCKS, pctx)) {
3834                                 p->clear = 1;
3835                                 return BLOCK_ABORT;
3836                         }
3837                         if (fix_problem(ctx, PR_1_SUPPRESS_MESSAGES, pctx)) {
3838                                 p->suppress = 1;
3839                                 set_latch_flags(PR_LATCH_BLOCK,
3840                                                 PRL_SUPPRESS, 0);
3841                         }
3842                 }
3843                 pctx->blk = blk;
3844                 pctx->blkcount = blockcnt;
3845                 if (fix_problem(ctx, problem, pctx)) {
3846                         blk = *block_nr = 0;
3847                         ret_code = BLOCK_CHANGED;
3848                         p->inode_modified = 1;
3849                         /*
3850                          * If the directory block is too big and is beyond the
3851                          * end of the FS, don't bother trying to add it for
3852                          * processing -- the kernel would never have created a
3853                          * directory this large, and we risk an ENOMEM abort.
3854                          * In any case, the toobig handler for extent-based
3855                          * directories also doesn't feed toobig blocks to
3856                          * pass 2.
3857                          */
3858                         if (problem == PR_1_TOOBIG_DIR)
3859                                 return ret_code;
3860                         goto mark_dir;
3861                 } else
3862                         return 0;
3863         }
3864
3865         if (p->ino == EXT2_RESIZE_INO) {
3866                 /*
3867                  * The resize inode has already be sanity checked
3868                  * during pass #0 (the superblock checks).  All we
3869                  * have to do is mark the double indirect block as
3870                  * being in use; all of the other blocks are handled
3871                  * by mark_table_blocks()).
3872                  */
3873                 if (blockcnt == BLOCK_COUNT_DIND)
3874                         mark_block_used(ctx, blk);
3875                 p->num_blocks++;
3876         } else if (!(ctx->fs->cluster_ratio_bits &&
3877                      p->previous_block &&
3878                      (EXT2FS_B2C(ctx->fs, blk) ==
3879                       EXT2FS_B2C(ctx->fs, p->previous_block)) &&
3880                      (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
3881                      ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
3882                 mark_block_used(ctx, blk);
3883                 p->num_blocks++;
3884         } else if (has_unaligned_cluster_map(ctx, p->previous_block,
3885                                              p->last_block, blk, blockcnt)) {
3886                 pctx->blk = blockcnt;
3887                 pctx->blk2 = blk;
3888                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3889                 mark_block_used(ctx, blk);
3890                 mark_block_used(ctx, blk);
3891         }
3892         if (blockcnt >= 0)
3893                 p->last_block = blockcnt;
3894         p->previous_block = blk;
3895 mark_dir:
3896         if (p->is_dir && (blockcnt >= 0)) {
3897                 while (++p->last_db_block < blockcnt) {
3898                         pctx->errcode = ext2fs_add_dir_block2(fs->dblist,
3899                                                               p->ino, 0,
3900                                                               p->last_db_block);
3901                         if (pctx->errcode) {
3902                                 pctx->blk = 0;
3903                                 pctx->num = p->last_db_block;
3904                                 goto failed_add_dir_block;
3905                         }
3906                 }
3907                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino,
3908                                                       blk, blockcnt);
3909                 if (pctx->errcode) {
3910                         pctx->blk = blk;
3911                         pctx->num = blockcnt;
3912                 failed_add_dir_block:
3913                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3914                         /* Should never get here */
3915                         ctx->flags |= E2F_FLAG_ABORT;
3916                         return BLOCK_ABORT;
3917                 }
3918         }
3919         return ret_code;
3920 }
3921
3922 static int process_bad_block(ext2_filsys fs,
3923                       blk64_t *block_nr,
3924                       e2_blkcnt_t blockcnt,
3925                       blk64_t ref_block EXT2FS_ATTR((unused)),
3926                       int ref_offset EXT2FS_ATTR((unused)),
3927                       void *priv_data)
3928 {
3929         struct process_block_struct *p;
3930         blk64_t         blk = *block_nr;
3931         blk64_t         first_block;
3932         dgrp_t          i;
3933         struct problem_context *pctx;
3934         e2fsck_t        ctx;
3935
3936         if (!blk)
3937                 return 0;
3938
3939         p = (struct process_block_struct *) priv_data;
3940         ctx = p->ctx;
3941         pctx = p->pctx;
3942
3943         pctx->ino = EXT2_BAD_INO;
3944         pctx->blk = blk;
3945         pctx->blkcount = blockcnt;
3946
3947         if ((blk < fs->super->s_first_data_block) ||
3948             (blk >= ext2fs_blocks_count(fs->super))) {
3949                 if (fix_problem(ctx, PR_1_BB_ILLEGAL_BLOCK_NUM, pctx)) {
3950                         *block_nr = 0;
3951                         return BLOCK_CHANGED;
3952                 } else
3953                         return 0;
3954         }
3955
3956         if (blockcnt < 0) {
3957                 if (ext2fs_test_block_bitmap2(p->fs_meta_blocks, blk)) {
3958                         p->bbcheck = 1;
3959                         if (fix_problem(ctx, PR_1_BB_FS_BLOCK, pctx)) {
3960                                 *block_nr = 0;
3961                                 return BLOCK_CHANGED;
3962                         }
3963                 } else if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3964                                                     blk)) {
3965                         p->bbcheck = 1;
3966                         if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK,
3967                                         pctx)) {
3968                                 *block_nr = 0;
3969                                 return BLOCK_CHANGED;
3970                         }
3971                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3972                                 return BLOCK_ABORT;
3973                 } else
3974                         mark_block_used(ctx, blk);
3975                 return 0;
3976         }
3977 #if 0
3978         printf ("DEBUG: Marking %u as bad.\n", blk);
3979 #endif
3980         ctx->fs_badblocks_count++;
3981         /*
3982          * If the block is not used, then mark it as used and return.
3983          * If it is already marked as found, this must mean that
3984          * there's an overlap between the filesystem table blocks
3985          * (bitmaps and inode table) and the bad block list.
3986          */
3987         if (!ext2fs_test_block_bitmap2(ctx->block_found_map, blk)) {
3988                 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
3989                 return 0;
3990         }
3991         /*
3992          * Try to find the where the filesystem block was used...
3993          */
3994         first_block = fs->super->s_first_data_block;
3995
3996         for (i = 0; i < fs->group_desc_count; i++ ) {
3997                 pctx->group = i;
3998                 pctx->blk = blk;
3999                 if (!ext2fs_bg_has_super(fs, i))
4000                         goto skip_super;
4001                 if (blk == first_block) {
4002                         if (i == 0) {
4003                                 if (fix_problem(ctx,
4004                                                 PR_1_BAD_PRIMARY_SUPERBLOCK,
4005                                                 pctx)) {
4006                                         *block_nr = 0;
4007                                         return BLOCK_CHANGED;
4008                                 }
4009                                 return 0;
4010                         }
4011                         fix_problem(ctx, PR_1_BAD_SUPERBLOCK, pctx);
4012                         return 0;
4013                 }
4014                 if ((blk > first_block) &&
4015                     (blk <= first_block + fs->desc_blocks)) {
4016                         if (i == 0) {
4017                                 pctx->blk = *block_nr;
4018                                 if (fix_problem(ctx,
4019                         PR_1_BAD_PRIMARY_GROUP_DESCRIPTOR, pctx)) {
4020                                         *block_nr = 0;
4021                                         return BLOCK_CHANGED;
4022                                 }
4023                                 return 0;
4024                         }
4025                         fix_problem(ctx, PR_1_BAD_GROUP_DESCRIPTORS, pctx);
4026                         return 0;
4027                 }
4028         skip_super:
4029                 if (blk == ext2fs_block_bitmap_loc(fs, i)) {
4030                         if (fix_problem(ctx, PR_1_BB_BAD_BLOCK, pctx)) {
4031                                 ctx->invalid_block_bitmap_flag[i]++;
4032                                 ctx->invalid_bitmaps++;
4033                         }
4034                         return 0;
4035                 }
4036                 if (blk == ext2fs_inode_bitmap_loc(fs, i)) {
4037                         if (fix_problem(ctx, PR_1_IB_BAD_BLOCK, pctx)) {
4038                                 ctx->invalid_inode_bitmap_flag[i]++;
4039                                 ctx->invalid_bitmaps++;
4040                         }
4041                         return 0;
4042                 }
4043                 if ((blk >= ext2fs_inode_table_loc(fs, i)) &&
4044                     (blk < (ext2fs_inode_table_loc(fs, i) +
4045                             fs->inode_blocks_per_group))) {
4046                         /*
4047                          * If there are bad blocks in the inode table,
4048                          * the inode scan code will try to do
4049                          * something reasonable automatically.
4050                          */
4051                         return 0;
4052                 }
4053                 first_block += fs->super->s_blocks_per_group;
4054         }
4055         /*
4056          * If we've gotten to this point, then the only
4057          * possibility is that the bad block inode meta data
4058          * is using a bad block.
4059          */
4060         if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) ||
4061             (blk == p->inode->i_block[EXT2_DIND_BLOCK]) ||
4062             (blk == p->inode->i_block[EXT2_TIND_BLOCK])) {
4063                 p->bbcheck = 1;
4064                 if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, pctx)) {
4065                         *block_nr = 0;
4066                         return BLOCK_CHANGED;
4067                 }
4068                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
4069                         return BLOCK_ABORT;
4070                 return 0;
4071         }
4072
4073         pctx->group = -1;
4074
4075         /* Warn user that the block wasn't claimed */
4076         fix_problem(ctx, PR_1_PROGERR_CLAIMED_BLOCK, pctx);
4077
4078         return 0;
4079 }
4080
4081 static void new_table_block(e2fsck_t ctx, blk64_t first_block, dgrp_t group,
4082                             const char *name, int num, blk64_t *new_block)
4083 {
4084         ext2_filsys fs = ctx->fs;
4085         dgrp_t          last_grp;
4086         blk64_t         old_block = *new_block;
4087         blk64_t         last_block;
4088         dgrp_t          flexbg;
4089         unsigned        flexbg_size;
4090         int             i, is_flexbg;
4091         char            *buf;
4092         struct problem_context  pctx;
4093
4094         clear_problem_context(&pctx);
4095
4096         pctx.group = group;
4097         pctx.blk = old_block;
4098         pctx.str = name;
4099
4100         /*
4101          * For flex_bg filesystems, first try to allocate the metadata
4102          * within the flex_bg, and if that fails then try finding the
4103          * space anywhere in the filesystem.
4104          */
4105         is_flexbg = ext2fs_has_feature_flex_bg(fs->super);
4106         if (is_flexbg) {
4107                 flexbg_size = 1U << fs->super->s_log_groups_per_flex;
4108                 flexbg = group / flexbg_size;
4109                 first_block = ext2fs_group_first_block2(fs,
4110                                                         flexbg_size * flexbg);
4111                 last_grp = group | (flexbg_size - 1);
4112                 if (last_grp >= fs->group_desc_count)
4113                         last_grp = fs->group_desc_count - 1;
4114                 last_block = ext2fs_group_last_block2(fs, last_grp);
4115         } else
4116                 last_block = ext2fs_group_last_block2(fs, group);
4117         pctx.errcode = ext2fs_get_free_blocks2(fs, first_block, last_block,
4118                                                num, ctx->block_found_map,
4119                                                new_block);
4120         if (is_flexbg && (pctx.errcode == EXT2_ET_BLOCK_ALLOC_FAIL))
4121                 pctx.errcode = ext2fs_get_free_blocks2(fs,
4122                                 fs->super->s_first_data_block,
4123                                 ext2fs_blocks_count(fs->super),
4124                                 num, ctx->block_found_map, new_block);
4125         if (pctx.errcode) {
4126                 pctx.num = num;
4127                 fix_problem(ctx, PR_1_RELOC_BLOCK_ALLOCATE, &pctx);
4128                 ext2fs_unmark_valid(fs);
4129                 ctx->flags |= E2F_FLAG_ABORT;
4130                 return;
4131         }
4132         pctx.errcode = ext2fs_get_mem(fs->blocksize, &buf);
4133         if (pctx.errcode) {
4134                 fix_problem(ctx, PR_1_RELOC_MEMORY_ALLOCATE, &pctx);
4135                 ext2fs_unmark_valid(fs);
4136                 ctx->flags |= E2F_FLAG_ABORT;
4137                 return;
4138         }
4139         ext2fs_mark_super_dirty(fs);
4140         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
4141         pctx.blk2 = *new_block;
4142         fix_problem(ctx, (old_block ? PR_1_RELOC_FROM_TO :
4143                           PR_1_RELOC_TO), &pctx);
4144         pctx.blk2 = 0;
4145         for (i = 0; i < num; i++) {
4146                 pctx.blk = i;
4147                 ext2fs_mark_block_bitmap2(ctx->block_found_map, (*new_block)+i);
4148                 if (old_block) {
4149                         pctx.errcode = io_channel_read_blk64(fs->io,
4150                                    old_block + i, 1, buf);
4151                         if (pctx.errcode)
4152                                 fix_problem(ctx, PR_1_RELOC_READ_ERR, &pctx);
4153                         pctx.blk = (*new_block) + i;
4154                         pctx.errcode = io_channel_write_blk64(fs->io, pctx.blk,
4155                                                               1, buf);
4156                 } else {
4157                         pctx.blk = (*new_block) + i;
4158                         pctx.errcode = ext2fs_zero_blocks2(fs, pctx.blk, 1,
4159                                                            NULL, NULL);
4160                 }
4161
4162                 if (pctx.errcode)
4163                         fix_problem(ctx, PR_1_RELOC_WRITE_ERR, &pctx);
4164         }
4165         ext2fs_free_mem(&buf);
4166 }
4167
4168 /*
4169  * This routine gets called at the end of pass 1 if bad blocks are
4170  * detected in the superblock, group descriptors, inode_bitmaps, or
4171  * block bitmaps.  At this point, all of the blocks have been mapped
4172  * out, so we can try to allocate new block(s) to replace the bad
4173  * blocks.
4174  */
4175 static void handle_fs_bad_blocks(e2fsck_t ctx)
4176 {
4177         ext2_filsys fs = ctx->fs;
4178         dgrp_t          i;
4179         blk64_t         first_block;
4180         blk64_t         new_blk;
4181
4182         for (i = 0; i < fs->group_desc_count; i++) {
4183                 first_block = ext2fs_group_first_block2(fs, i);
4184
4185                 if (ctx->invalid_block_bitmap_flag[i]) {
4186                         new_blk = ext2fs_block_bitmap_loc(fs, i);
4187                         new_table_block(ctx, first_block, i, _("block bitmap"),
4188                                         1, &new_blk);
4189                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
4190                 }
4191                 if (ctx->invalid_inode_bitmap_flag[i]) {
4192                         new_blk = ext2fs_inode_bitmap_loc(fs, i);
4193                         new_table_block(ctx, first_block, i, _("inode bitmap"),
4194                                         1, &new_blk);
4195                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
4196                 }
4197                 if (ctx->invalid_inode_table_flag[i]) {
4198                         new_blk = ext2fs_inode_table_loc(fs, i);
4199                         new_table_block(ctx, first_block, i, _("inode table"),
4200                                         fs->inode_blocks_per_group,
4201                                         &new_blk);
4202                         ext2fs_inode_table_loc_set(fs, i, new_blk);
4203                         ctx->flags |= E2F_FLAG_RESTART;
4204                 }
4205         }
4206         ctx->invalid_bitmaps = 0;
4207 }
4208
4209 /*
4210  * This routine marks all blocks which are used by the superblock,
4211  * group descriptors, inode bitmaps, and block bitmaps.
4212  */
4213 static void mark_table_blocks(e2fsck_t ctx)
4214 {
4215         ext2_filsys fs = ctx->fs;
4216         blk64_t b;
4217         dgrp_t  i;
4218         unsigned int    j;
4219         struct problem_context pctx;
4220
4221         clear_problem_context(&pctx);
4222
4223         for (i = 0; i < fs->group_desc_count; i++) {
4224                 pctx.group = i;
4225
4226                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_found_map);
4227                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_metadata_map);
4228
4229                 /*
4230                  * Mark the blocks used for the inode table
4231                  */
4232                 if (ext2fs_inode_table_loc(fs, i)) {
4233                         for (j = 0, b = ext2fs_inode_table_loc(fs, i);
4234                              j < fs->inode_blocks_per_group;
4235                              j++, b++) {
4236                                 if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4237                                                              b)) {
4238                                         pctx.blk = b;
4239                                         if (!ctx->invalid_inode_table_flag[i] &&
4240                                             fix_problem(ctx,
4241                                                 PR_1_ITABLE_CONFLICT, &pctx)) {
4242                                                 ctx->invalid_inode_table_flag[i]++;
4243                                                 ctx->invalid_bitmaps++;
4244                                         }
4245                                 } else {
4246                                     ext2fs_mark_block_bitmap2(
4247                                                 ctx->block_found_map, b);
4248                                     ext2fs_mark_block_bitmap2(
4249                                                 ctx->block_metadata_map, b);
4250                                 }
4251                         }
4252                 }
4253
4254                 /*
4255                  * Mark block used for the block bitmap
4256                  */
4257                 if (ext2fs_block_bitmap_loc(fs, i)) {
4258                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4259                                      ext2fs_block_bitmap_loc(fs, i))) {
4260                                 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
4261                                 if (fix_problem(ctx, PR_1_BB_CONFLICT, &pctx)) {
4262                                         ctx->invalid_block_bitmap_flag[i]++;
4263                                         ctx->invalid_bitmaps++;
4264                                 }
4265                         } else {
4266                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4267                                      ext2fs_block_bitmap_loc(fs, i));
4268                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4269                                      ext2fs_block_bitmap_loc(fs, i));
4270                         }
4271                 }
4272                 /*
4273                  * Mark block used for the inode bitmap
4274                  */
4275                 if (ext2fs_inode_bitmap_loc(fs, i)) {
4276                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4277                                      ext2fs_inode_bitmap_loc(fs, i))) {
4278                                 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
4279                                 if (fix_problem(ctx, PR_1_IB_CONFLICT, &pctx)) {
4280                                         ctx->invalid_inode_bitmap_flag[i]++;
4281                                         ctx->invalid_bitmaps++;
4282                                 }
4283                         } else {
4284                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4285                                      ext2fs_inode_bitmap_loc(fs, i));
4286                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4287                                      ext2fs_inode_bitmap_loc(fs, i));
4288                         }
4289                 }
4290         }
4291 }
4292
4293 /*
4294  * These subroutines short circuits ext2fs_get_blocks and
4295  * ext2fs_check_directory; we use them since we already have the inode
4296  * structure, so there's no point in letting the ext2fs library read
4297  * the inode again.
4298  */
4299 static errcode_t pass1_get_blocks(ext2_filsys fs, ext2_ino_t ino,
4300                                   blk_t *blocks)
4301 {
4302         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4303         int     i;
4304
4305         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4306                 return EXT2_ET_CALLBACK_NOTHANDLED;
4307
4308         for (i=0; i < EXT2_N_BLOCKS; i++)
4309                 blocks[i] = ctx->stashed_inode->i_block[i];
4310         return 0;
4311 }
4312
4313 static errcode_t pass1_read_inode(ext2_filsys fs, ext2_ino_t ino,
4314                                   struct ext2_inode *inode)
4315 {
4316         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4317
4318         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4319                 return EXT2_ET_CALLBACK_NOTHANDLED;
4320         *inode = *ctx->stashed_inode;
4321         return 0;
4322 }
4323
4324 static errcode_t pass1_write_inode(ext2_filsys fs, ext2_ino_t ino,
4325                             struct ext2_inode *inode)
4326 {
4327         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4328
4329         if ((ino == ctx->stashed_ino) && ctx->stashed_inode &&
4330                 (inode != ctx->stashed_inode))
4331                 *ctx->stashed_inode = *inode;
4332         return EXT2_ET_CALLBACK_NOTHANDLED;
4333 }
4334
4335 static errcode_t pass1_check_directory(ext2_filsys fs, ext2_ino_t ino)
4336 {
4337         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4338
4339         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4340                 return EXT2_ET_CALLBACK_NOTHANDLED;
4341
4342         if (!LINUX_S_ISDIR(ctx->stashed_inode->i_mode))
4343                 return EXT2_ET_NO_DIRECTORY;
4344         return 0;
4345 }
4346
4347 static errcode_t e2fsck_get_alloc_block(ext2_filsys fs, blk64_t goal,
4348                                         blk64_t *ret)
4349 {
4350         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4351         errcode_t       retval;
4352         blk64_t         new_block;
4353
4354         if (ctx->block_found_map) {
4355                 retval = ext2fs_new_block2(fs, goal, ctx->block_found_map,
4356                                            &new_block);
4357                 if (retval)
4358                         return retval;
4359                 if (fs->block_map) {
4360                         ext2fs_mark_block_bitmap2(fs->block_map, new_block);
4361                         ext2fs_mark_bb_dirty(fs);
4362                 }
4363         } else {
4364                 if (!fs->block_map) {
4365                         retval = ext2fs_read_block_bitmap(fs);
4366                         if (retval)
4367                                 return retval;
4368                 }
4369
4370                 retval = ext2fs_new_block2(fs, goal, fs->block_map, &new_block);
4371                 if (retval)
4372                         return retval;
4373         }
4374
4375         *ret = new_block;
4376         return (0);
4377 }
4378
4379 static errcode_t e2fsck_new_range(ext2_filsys fs, int flags, blk64_t goal,
4380                                   blk64_t len, blk64_t *pblk, blk64_t *plen)
4381 {
4382         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4383         errcode_t       retval;
4384
4385         if (ctx->block_found_map)
4386                 return ext2fs_new_range(fs, flags, goal, len,
4387                                         ctx->block_found_map, pblk, plen);
4388
4389         if (!fs->block_map) {
4390                 retval = ext2fs_read_block_bitmap(fs);
4391                 if (retval)
4392                         return retval;
4393         }
4394
4395         return ext2fs_new_range(fs, flags, goal, len, fs->block_map,
4396                                 pblk, plen);
4397 }
4398
4399 static void e2fsck_block_alloc_stats(ext2_filsys fs, blk64_t blk, int inuse)
4400 {
4401         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4402
4403         /* Never free a critical metadata block */
4404         if (ctx->block_found_map &&
4405             ctx->block_metadata_map &&
4406             inuse < 0 &&
4407             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk))
4408                 return;
4409
4410         if (ctx->block_found_map) {
4411                 if (inuse > 0)
4412                         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4413                 else
4414                         ext2fs_unmark_block_bitmap2(ctx->block_found_map, blk);
4415         }
4416 }
4417
4418 static void e2fsck_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
4419                                            blk_t num, int inuse)
4420 {
4421         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4422
4423         /* Never free a critical metadata block */
4424         if (ctx->block_found_map &&
4425             ctx->block_metadata_map &&
4426             inuse < 0 &&
4427             ext2fs_test_block_bitmap_range2(ctx->block_metadata_map, blk, num))
4428                 return;
4429
4430         if (ctx->block_found_map) {
4431                 if (inuse > 0)
4432                         ext2fs_mark_block_bitmap_range2(ctx->block_found_map,
4433                                                         blk, num);
4434                 else
4435                         ext2fs_unmark_block_bitmap_range2(ctx->block_found_map,
4436                                                         blk, num);
4437         }
4438 }
4439
4440 void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts)
4441 {
4442         ext2_filsys fs = ctx->fs;
4443
4444         if (use_shortcuts) {
4445                 fs->get_blocks = pass1_get_blocks;
4446                 fs->check_directory = pass1_check_directory;
4447                 fs->read_inode = pass1_read_inode;
4448                 fs->write_inode = pass1_write_inode;
4449                 ctx->stashed_ino = 0;
4450         } else {
4451                 fs->get_blocks = 0;
4452                 fs->check_directory = 0;
4453                 fs->read_inode = 0;
4454                 fs->write_inode = 0;
4455         }
4456 }
4457
4458 void e2fsck_intercept_block_allocations(e2fsck_t ctx)
4459 {
4460         ext2fs_set_alloc_block_callback(ctx->fs, e2fsck_get_alloc_block, 0);
4461         ext2fs_set_block_alloc_stats_callback(ctx->fs,
4462                                                 e2fsck_block_alloc_stats, 0);
4463         ext2fs_set_new_range_callback(ctx->fs, e2fsck_new_range, NULL);
4464         ext2fs_set_block_alloc_stats_range_callback(ctx->fs,
4465                                         e2fsck_block_alloc_stats_range, NULL);
4466 }