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 blocks are in use.          (block_found_map)
  27  *      - A bitmap of which blocks are in use by two inodes     (block_dup_map)
  28  *      - The data blocks of the directory inodes.      (dir_map)
  29  *      - Ref counts for ea_inodes.                     (ea_inode_refs)
  30  *
  31  * Pass 1 is designed to stash away enough information so that the
  32  * other passes should not need to read in the inode information
  33  * during the normal course of a filesystem check.  (Although if an
  34  * inconsistency is detected, other passes may need to read in an
  35  * inode to fix it.)
  36  *
  37  * Note that pass 1B will be invoked if there are any duplicate blocks
  38  * found.
  39  */
  40
  41 #define _GNU_SOURCE 1 /* get strnlen() */
  42 #include "config.h"
  43 #include <string.h>
  44 #include <time.h>
  45 #ifdef HAVE_ERRNO_H
  46 #include <errno.h>
  47 #endif
  48
  49 #include "e2fsck.h"
  50 #include <ext2fs/ext2_ext_attr.h>
  51
  52 #include "problem.h"
  53
  54 #ifdef NO_INLINE_FUNCS
  55 #define _INLINE_
  56 #else
  57 #define _INLINE_ inline
  58 #endif
  59
  60 #undef DEBUG
  61
  62 struct ea_quota {
  63         blk64_t blocks;
  64         __u64 inodes;
  65 };
  66
  67 static int process_block(ext2_filsys fs, blk64_t        *blocknr,
  68                          e2_blkcnt_t blockcnt, blk64_t ref_blk,
  69                          int ref_offset, void *priv_data);
  70 static int process_bad_block(ext2_filsys fs, blk64_t *block_nr,
  71                              e2_blkcnt_t blockcnt, blk64_t ref_blk,
  72                              int ref_offset, void *priv_data);
  73 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
  74                          char *block_buf,
  75                          const struct ea_quota *ea_ibody_quota);
  76 static void mark_table_blocks(e2fsck_t ctx);
  77 static void alloc_bb_map(e2fsck_t ctx);
  78 static void alloc_imagic_map(e2fsck_t ctx);
  79 static void mark_inode_bad(e2fsck_t ctx, ino_t ino);
  80 static void add_encrypted_dir(e2fsck_t ctx, ino_t ino);
  81 static void handle_fs_bad_blocks(e2fsck_t ctx);
  82 static void process_inodes(e2fsck_t ctx, char *block_buf);
  83 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b);
  84 static errcode_t scan_callback(ext2_filsys fs, ext2_inode_scan scan,
  85                                   dgrp_t group, void * priv_data);
  86 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
  87                                     char *block_buf, int adjust_sign);
  88 /* static char *describe_illegal_block(ext2_filsys fs, blk64_t block); */
  89
  90 struct process_block_struct {
  91         ext2_ino_t      ino;
  92         unsigned        is_dir:1, is_reg:1, clear:1, suppress:1,
  93                                 fragmented:1, compressed:1, bbcheck:1,
  94                                 inode_modified:1;
  95         blk64_t         num_blocks;
  96         blk64_t         max_blocks;
  97         blk64_t         last_block;
  98         e2_blkcnt_t     last_init_lblock;
  99         e2_blkcnt_t     last_db_block;
 100         int             num_illegal_blocks;
 101         blk64_t         previous_block;
 102         struct ext2_inode *inode;
 103         struct problem_context *pctx;
 104         ext2fs_block_bitmap fs_meta_blocks;
 105         e2fsck_t        ctx;
 106         blk64_t         next_lblock;
 107         struct extent_tree_info eti;
 108 };
 109
 110 struct process_inode_block {
 111         ext2_ino_t ino;
 112         struct ea_quota ea_ibody_quota;
 113         struct ext2_inode_large inode;
 114 };
 115
 116 struct scan_callback_struct {
 117         e2fsck_t        ctx;
 118         char            *block_buf;
 119 };
 120
 121 /*
 122  * For the inodes to process list.
 123  */
 124 static struct process_inode_block *inodes_to_process;
 125 static int process_inode_count;
 126
 127 static __u64 ext2_max_sizes[EXT2_MAX_BLOCK_LOG_SIZE -
 128                             EXT2_MIN_BLOCK_LOG_SIZE + 1];
 129
 130 /*
 131  * Free all memory allocated by pass1 in preparation for restarting
 132  * things.
 133  */
 134 static void unwind_pass1(ext2_filsys fs EXT2FS_ATTR((unused)))
 135 {
 136         ext2fs_free_mem(&inodes_to_process);
 137         inodes_to_process = 0;
 138 }
 139
 140 /*
 141  * Check to make sure a device inode is real.  Returns 1 if the device
 142  * checks out, 0 if not.
 143  *
 144  * Note: this routine is now also used to check FIFO's and Sockets,
 145  * since they have the same requirement; the i_block fields should be
 146  * zero.
 147  */
 148 int e2fsck_pass1_check_device_inode(ext2_filsys fs EXT2FS_ATTR((unused)),
 149                                     struct ext2_inode *inode)
 150 {
 151         int     i;
 152
 153         /*
 154          * If the index flag is set, then this is a bogus
 155          * device/fifo/socket
 156          */
 157         if (inode->i_flags & EXT2_INDEX_FL)
 158                 return 0;
 159
 160         /*
 161          * We should be able to do the test below all the time, but
 162          * because the kernel doesn't forcibly clear the device
 163          * inode's additional i_block fields, there are some rare
 164          * occasions when a legitimate device inode will have non-zero
 165          * additional i_block fields.  So for now, we only complain
 166          * when the immutable flag is set, which should never happen
 167          * for devices.  (And that's when the problem is caused, since
 168          * you can't set or clear immutable flags for devices.)  Once
 169          * the kernel has been fixed we can change this...
 170          */
 171         if (inode->i_flags & (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)) {
 172                 for (i=4; i < EXT2_N_BLOCKS; i++)
 173                         if (inode->i_block[i])
 174                                 return 0;
 175         }
 176         return 1;
 177 }
 178
 179 /*
 180  * Check to make sure a symlink inode is real.  Returns 1 if the symlink
 181  * checks out, 0 if not.
 182  */
 183 int e2fsck_pass1_check_symlink(ext2_filsys fs, ext2_ino_t ino,
 184                                struct ext2_inode *inode, char *buf)
 185 {
 186         unsigned int buflen;
 187         unsigned int len;
 188
 189         if ((inode->i_size_high || inode->i_size == 0) ||
 190             (inode->i_flags & EXT2_INDEX_FL))
 191                 return 0;
 192
 193         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
 194                 size_t inline_size;
 195
 196                 if (inode->i_flags & EXT4_EXTENTS_FL)
 197                         return 0;
 198                 if (ext2fs_inline_data_size(fs, ino, &inline_size))
 199                         return 0;
 200                 if (inode->i_size != inline_size)
 201                         return 0;
 202
 203                 return 1;
 204         }
 205
 206         if (ext2fs_is_fast_symlink(inode)) {
 207                 if (inode->i_flags & EXT4_EXTENTS_FL)
 208                         return 0;
 209                 buf = (char *)inode->i_block;
 210                 buflen = sizeof(inode->i_block);
 211         } else {
 212                 ext2_extent_handle_t    handle;
 213                 struct ext2_extent_info info;
 214                 struct ext2fs_extent    extent;
 215                 blk64_t blk;
 216                 int i;
 217
 218                 if (inode->i_flags & EXT4_EXTENTS_FL) {
 219                         if (ext2fs_extent_open2(fs, ino, inode, &handle))
 220                                 return 0;
 221                         if (ext2fs_extent_get_info(handle, &info) ||
 222                             (info.num_entries != 1) ||
 223                             (info.max_depth != 0)) {
 224                                 ext2fs_extent_free(handle);
 225                                 return 0;
 226                         }
 227                         if (ext2fs_extent_get(handle, EXT2_EXTENT_ROOT,
 228                                               &extent) ||
 229                             (extent.e_lblk != 0) ||
 230                             (extent.e_len != 1)) {
 231                                 ext2fs_extent_free(handle);
 232                                 return 0;
 233                         }
 234                         blk = extent.e_pblk;
 235                         ext2fs_extent_free(handle);
 236                 } else {
 237                         blk = inode->i_block[0];
 238
 239                         for (i = 1; i < EXT2_N_BLOCKS; i++)
 240                                 if (inode->i_block[i])
 241                                         return 0;
 242                 }
 243
 244                 if (blk < fs->super->s_first_data_block ||
 245                     blk >= ext2fs_blocks_count(fs->super))
 246                         return 0;
 247
 248                 if (io_channel_read_blk64(fs->io, blk, 1, buf))
 249                         return 0;
 250
 251                 buflen = fs->blocksize;
 252         }
 253
 254         if (inode->i_flags & EXT4_ENCRYPT_FL)
 255                 len = ext2fs_le16_to_cpu(*(__u16 *)buf) + 2;
 256         else
 257                 len = strnlen(buf, buflen);
 258
 259         if (len >= buflen)
 260                 return 0;
 261
 262         if (len != inode->i_size)
 263                 return 0;
 264         return 1;
 265 }
 266
 267 /*
 268  * If the extents or inlinedata flags are set on the inode, offer to clear 'em.
 269  */
 270 #define BAD_SPECIAL_FLAGS (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)
 271 static void check_extents_inlinedata(e2fsck_t ctx,
 272                                      struct problem_context *pctx)
 273 {
 274         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 275                 return;
 276
 277         if (!fix_problem(ctx, PR_1_SPECIAL_EXTENTS_IDATA, pctx))
 278                 return;
 279
 280         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 281         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 282 }
 283 #undef BAD_SPECIAL_FLAGS
 284
 285 /*
 286  * If the immutable (or append-only) flag is set on the inode, offer
 287  * to clear it.
 288  */
 289 #define BAD_SPECIAL_FLAGS (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)
 290 static void check_immutable(e2fsck_t ctx, struct problem_context *pctx)
 291 {
 292         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 293                 return;
 294
 295         if (!fix_problem(ctx, PR_1_SET_IMMUTABLE, pctx))
 296                 return;
 297
 298         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 299         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 300 }
 301
 302 /*
 303  * If device, fifo or socket, check size is zero -- if not offer to
 304  * clear it
 305  */
 306 static void check_size(e2fsck_t ctx, struct problem_context *pctx)
 307 {
 308         struct ext2_inode *inode = pctx->inode;
 309
 310         if (EXT2_I_SIZE(inode) == 0)
 311                 return;
 312
 313         if (!fix_problem(ctx, PR_1_SET_NONZSIZE, pctx))
 314                 return;
 315
 316         ext2fs_inode_size_set(ctx->fs, inode, 0);
 317         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 318 }
 319
 320 /*
 321  * For a given size, calculate how many blocks would be charged towards quota.
 322  */
 323 static blk64_t size_to_quota_blocks(ext2_filsys fs, size_t size)
 324 {
 325         blk64_t clusters;
 326
 327         clusters = DIV_ROUND_UP(size, fs->blocksize << fs->cluster_ratio_bits);
 328         return EXT2FS_C2B(fs, clusters);
 329 }
 330
 331 /*
 332  * Check validity of EA inode. Return 0 if EA inode is valid, otherwise return
 333  * the problem code.
 334  */
 335 static problem_t check_large_ea_inode(e2fsck_t ctx,
 336                                       struct ext2_ext_attr_entry *entry,
 337                                       struct problem_context *pctx,
 338                                       blk64_t *quota_blocks)
 339 {
 340         struct ext2_inode inode;
 341         __u32 hash;
 342         errcode_t retval;
 343
 344         /* Check if inode is within valid range */
 345         if ((entry->e_value_inum < EXT2_FIRST_INODE(ctx->fs->super)) ||
 346             (entry->e_value_inum > ctx->fs->super->s_inodes_count)) {
 347                 pctx->num = entry->e_value_inum;
 348                 return PR_1_ATTR_VALUE_EA_INODE;
 349         }
 350
 351         e2fsck_read_inode(ctx, entry->e_value_inum, &inode, "pass1");
 352
 353         retval = ext2fs_ext_attr_hash_entry2(ctx->fs, entry, NULL, &hash);
 354         if (retval) {
 355                 com_err("check_large_ea_inode", retval,
 356                         _("while hashing entry with e_value_inum = %u"),
 357                         entry->e_value_inum);
 358                 fatal_error(ctx, 0);
 359         }
 360
 361         if (hash == entry->e_hash) {
 362                 *quota_blocks = size_to_quota_blocks(ctx->fs,
 363                                                      entry->e_value_size);
 364         } else {
 365                 /* This might be an old Lustre-style ea_inode reference. */
 366                 if (inode.i_mtime == pctx->ino &&
 367                     inode.i_generation == pctx->inode->i_generation) {
 368                         *quota_blocks = 0;
 369                 } else {
 370                         /* If target inode is also missing EA_INODE flag,
 371                          * this is likely to be a bad reference.
 372                          */
 373                         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 374                                 pctx->num = entry->e_value_inum;
 375                                 return PR_1_ATTR_VALUE_EA_INODE;
 376                         } else {
 377                                 pctx->num = entry->e_hash;
 378                                 return PR_1_ATTR_HASH;
 379                         }
 380                 }
 381         }
 382
 383         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 384                 pctx->num = entry->e_value_inum;
 385                 if (fix_problem(ctx, PR_1_ATTR_SET_EA_INODE_FL, pctx)) {
 386                         inode.i_flags |= EXT4_EA_INODE_FL;
 387                         ext2fs_write_inode(ctx->fs, entry->e_value_inum,
 388                                            &inode);
 389                 } else {
 390                         return PR_1_ATTR_NO_EA_INODE_FL;
 391                 }
 392         }
 393         return 0;
 394 }
 395
 396 static void inc_ea_inode_refs(e2fsck_t ctx, struct problem_context *pctx,
 397                               struct ext2_ext_attr_entry *first, void *end)
 398 {
 399         struct ext2_ext_attr_entry *entry;
 400
 401         for (entry = first;
 402              (void *)entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry);
 403              entry = EXT2_EXT_ATTR_NEXT(entry)) {
 404                 if (!entry->e_value_inum)
 405                         continue;
 406                 if (!ctx->ea_inode_refs) {
 407                         pctx->errcode = ea_refcount_create(0,
 408                                                            &ctx->ea_inode_refs);
 409                         if (pctx->errcode) {
 410                                 pctx->num = 4;
 411                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
 412                                 ctx->flags |= E2F_FLAG_ABORT;
 413                                 return;
 414                         }
 415                 }
 416                 ea_refcount_increment(ctx->ea_inode_refs, entry->e_value_inum,
 417                                       0);
 418         }
 419 }
 420
 421 static void check_ea_in_inode(e2fsck_t ctx, struct problem_context *pctx,
 422                               struct ea_quota *ea_ibody_quota)
 423 {
 424         struct ext2_super_block *sb = ctx->fs->super;
 425         struct ext2_inode_large *inode;
 426         struct ext2_ext_attr_entry *entry;
 427         char *start, *header, *end;
 428         unsigned int storage_size, remain;
 429         problem_t problem = 0;
 430         region_t region = 0;
 431
 432         ea_ibody_quota->blocks = 0;
 433         ea_ibody_quota->inodes = 0;
 434
 435         inode = (struct ext2_inode_large *) pctx->inode;
 436         storage_size = EXT2_INODE_SIZE(ctx->fs->super) - EXT2_GOOD_OLD_INODE_SIZE -
 437                 inode->i_extra_isize;
 438         header = ((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 439                  inode->i_extra_isize;
 440         end = header + storage_size;
 441         start = header + sizeof(__u32);
 442         entry = (struct ext2_ext_attr_entry *) start;
 443
 444         /* scan all entry's headers first */
 445
 446         /* take finish entry 0UL into account */
 447         remain = storage_size - sizeof(__u32);
 448
 449         region = region_create(0, storage_size);
 450         if (!region) {
 451                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
 452                 problem = 0;
 453                 ctx->flags |= E2F_FLAG_ABORT;
 454                 return;
 455         }
 456         if (region_allocate(region, 0, sizeof(__u32))) {
 457                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 458                 goto fix;
 459         }
 460
 461         while (remain >= sizeof(struct ext2_ext_attr_entry) &&
 462                !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 463                 __u32 hash;
 464
 465                 if (region_allocate(region, (char *)entry - (char *)header,
 466                                     EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
 467                         problem = PR_1_INODE_EA_ALLOC_COLLISION;
 468                         goto fix;
 469                 }
 470
 471                 /* header eats this space */
 472                 remain -= sizeof(struct ext2_ext_attr_entry);
 473
 474                 /* is attribute name valid? */
 475                 if (EXT2_EXT_ATTR_SIZE(entry->e_name_len) > remain) {
 476                         pctx->num = entry->e_name_len;
 477                         problem = PR_1_ATTR_NAME_LEN;
 478                         goto fix;
 479                 }
 480
 481                 /* attribute len eats this space */
 482                 remain -= EXT2_EXT_ATTR_SIZE(entry->e_name_len);
 483
 484                 if (entry->e_value_inum == 0) {
 485                         /* check value size */
 486                         if (entry->e_value_size > remain) {
 487                                 pctx->num = entry->e_value_size;
 488                                 problem = PR_1_ATTR_VALUE_SIZE;
 489                                 goto fix;
 490                         }
 491
 492                         if (entry->e_value_size &&
 493                             region_allocate(region,
 494                                             sizeof(__u32) + entry->e_value_offs,
 495                                             EXT2_EXT_ATTR_SIZE(
 496                                                 entry->e_value_size))) {
 497                                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 498                                 goto fix;
 499                         }
 500
 501                         hash = ext2fs_ext_attr_hash_entry(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         int                     full_map;
 823
 824         *ret = 0;
 825
 826         profile_get_string(ctx->profile, "scratch_files", "directory", 0, 0,
 827                            &tdb_dir);
 828         profile_get_uint(ctx->profile, "scratch_files",
 829                          "numdirs_threshold", 0, 0, &threshold);
 830         profile_get_boolean(ctx->profile, "scratch_files",
 831                             "icount", 0, 1, &enable);
 832
 833         retval = ext2fs_get_num_dirs(ctx->fs, &num_dirs);
 834         if (retval)
 835                 num_dirs = 1024;        /* Guess */
 836
 837         if (enable && tdb_dir && !access(tdb_dir, W_OK) &&
 838             (!threshold || num_dirs > threshold)) {
 839                 retval = ext2fs_create_icount_tdb(ctx->fs, tdb_dir,
 840                                                   flags, ret);
 841                 if (retval == 0)
 842                         return 0;
 843         }
 844         e2fsck_set_bitmap_type(ctx->fs, EXT2FS_BMAP64_RBTREE, icount_name,
 845                                &save_type);
 846         if (ctx->options & E2F_OPT_ICOUNT_FULLMAP)
 847                 flags |= EXT2_ICOUNT_OPT_FULLMAP;
 848         retval = ext2fs_create_icount2(ctx->fs, flags, 0, hint, ret);
 849         ctx->fs->default_bitmap_type = save_type;
 850         return retval;
 851 }
 852
 853 static errcode_t recheck_bad_inode_checksum(ext2_filsys fs, ext2_ino_t ino,
 854                                             e2fsck_t ctx,
 855                                             struct problem_context *pctx)
 856 {
 857         errcode_t retval;
 858         struct ext2_inode_large inode;
 859
 860         /*
 861          * Reread inode.  If we don't see checksum error, then this inode
 862          * has been fixed elsewhere.
 863          */
 864         ctx->stashed_ino = 0;
 865         retval = ext2fs_read_inode_full(fs, ino, (struct ext2_inode *)&inode,
 866                                         sizeof(inode));
 867         if (retval && retval != EXT2_ET_INODE_CSUM_INVALID)
 868                 return retval;
 869         if (!retval)
 870                 return 0;
 871
 872         /*
 873          * Checksum still doesn't match.  That implies that the inode passes
 874          * all the sanity checks, so maybe the checksum is simply corrupt.
 875          * See if the user will go for fixing that.
 876          */
 877         if (!fix_problem(ctx, PR_1_INODE_ONLY_CSUM_INVALID, pctx))
 878                 return 0;
 879
 880         retval = ext2fs_write_inode_full(fs, ino, (struct ext2_inode *)&inode,
 881                                          sizeof(inode));
 882         return retval;
 883 }
 884
 885 static void reserve_block_for_root_repair(e2fsck_t ctx)
 886 {
 887         blk64_t         blk = 0;
 888         errcode_t       err;
 889         ext2_filsys     fs = ctx->fs;
 890
 891         ctx->root_repair_block = 0;
 892         if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO))
 893                 return;
 894
 895         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 896         if (err)
 897                 return;
 898         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 899         ctx->root_repair_block = blk;
 900 }
 901
 902 static void reserve_block_for_lnf_repair(e2fsck_t ctx)
 903 {
 904         blk64_t         blk = 0;
 905         errcode_t       err;
 906         ext2_filsys     fs = ctx->fs;
 907         static const char name[] = "lost+found";
 908         ext2_ino_t      ino;
 909
 910         ctx->lnf_repair_block = 0;
 911         if (!ext2fs_lookup(fs, EXT2_ROOT_INO, name, sizeof(name)-1, 0, &ino))
 912                 return;
 913
 914         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 915         if (err)
 916                 return;
 917         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 918         ctx->lnf_repair_block = blk;
 919 }
 920
 921 static errcode_t get_inline_data_ea_size(ext2_filsys fs, ext2_ino_t ino,
 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(handle);
 933         if (retval)
 934                 goto err;
 935
 936         retval = ext2fs_xattr_get(handle, "system.data", &p, sz);
 937         if (retval)
 938                 goto err;
 939         ext2fs_free_mem(&p);
 940 err:
 941         (void) ext2fs_xattrs_close(&handle);
 942         return retval;
 943 }
 944
 945 static void finish_processing_inode(e2fsck_t ctx, ext2_ino_t ino,
 946                                     struct problem_context *pctx,
 947                                     int failed_csum)
 948 {
 949         if (!failed_csum)
 950                 return;
 951
 952         /*
 953          * If the inode failed the checksum and the user didn't
 954          * clear the inode, test the checksum again -- if it still
 955          * fails, ask the user if the checksum should be corrected.
 956          */
 957         pctx->errcode = recheck_bad_inode_checksum(ctx->fs, ino, ctx, pctx);
 958         if (pctx->errcode)
 959                 ctx->flags |= E2F_FLAG_ABORT;
 960 }
 961 #define FINISH_INODE_LOOP(ctx, ino, pctx, failed_csum) \
 962         do { \
 963                 finish_processing_inode((ctx), (ino), (pctx), (failed_csum)); \
 964                 if ((ctx)->flags & E2F_FLAG_ABORT) \
 965                         return; \
 966         } while (0)
 967
 968 static int could_be_block_map(ext2_filsys fs, struct ext2_inode *inode)
 969 {
 970         __u32 x;
 971         int i;
 972
 973         for (i = 0; i < EXT2_N_BLOCKS; i++) {
 974                 x = inode->i_block[i];
 975 #ifdef WORDS_BIGENDIAN
 976                 x = ext2fs_swab32(x);
 977 #endif
 978                 if (x >= ext2fs_blocks_count(fs->super))
 979                         return 0;
 980         }
 981
 982         return 1;
 983 }
 984
 985 /*
 986  * Figure out what to do with an inode that has both extents and inline data
 987  * inode flags set.  Returns -1 if we decide to erase the inode, 0 otherwise.
 988  */
 989 static int fix_inline_data_extents_file(e2fsck_t ctx,
 990                                         ext2_ino_t ino,
 991                                         struct ext2_inode *inode,
 992                                         int inode_size,
 993                                         struct problem_context *pctx)
 994 {
 995         size_t max_inline_ea_size;
 996         ext2_filsys fs = ctx->fs;
 997         int dirty = 0;
 998
 999         /* Both feature flags not set?  Just run the regular checks */
1000         if (!ext2fs_has_feature_extents(fs->super) &&
1001             !ext2fs_has_feature_inline_data(fs->super))
1002                 return 0;
1003
1004         /* Clear both flags if it's a special file */
1005         if (LINUX_S_ISCHR(inode->i_mode) ||
1006             LINUX_S_ISBLK(inode->i_mode) ||
1007             LINUX_S_ISFIFO(inode->i_mode) ||
1008             LINUX_S_ISSOCK(inode->i_mode)) {
1009                 check_extents_inlinedata(ctx, pctx);
1010                 return 0;
1011         }
1012
1013         /* If it looks like an extent tree, try to clear inlinedata */
1014         if (ext2fs_extent_header_verify(inode->i_block,
1015                                  sizeof(inode->i_block)) == 0 &&
1016             fix_problem(ctx, PR_1_CLEAR_INLINE_DATA_FOR_EXTENT, pctx)) {
1017                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1018                 dirty = 1;
1019                 goto out;
1020         }
1021
1022         /* If it looks short enough to be inline data, try to clear extents */
1023         if (inode_size > EXT2_GOOD_OLD_INODE_SIZE)
1024                 max_inline_ea_size = inode_size -
1025                                      (EXT2_GOOD_OLD_INODE_SIZE +
1026                                       ((struct ext2_inode_large *)inode)->i_extra_isize);
1027         else
1028                 max_inline_ea_size = 0;
1029         if (EXT2_I_SIZE(inode) <
1030             EXT4_MIN_INLINE_DATA_SIZE + max_inline_ea_size &&
1031             fix_problem(ctx, PR_1_CLEAR_EXTENT_FOR_INLINE_DATA, pctx)) {
1032                 inode->i_flags &= ~EXT4_EXTENTS_FL;
1033                 dirty = 1;
1034                 goto out;
1035         }
1036
1037         /*
1038          * Too big for inline data, but no evidence of extent tree -
1039          * maybe it's a block map file?  If the mappings all look valid?
1040          */
1041         if (could_be_block_map(fs, inode) &&
1042             fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_FLAGS, pctx)) {
1043 #ifdef WORDS_BIGENDIAN
1044                 int i;
1045
1046                 for (i = 0; i < EXT2_N_BLOCKS; i++)
1047                         inode->i_block[i] = ext2fs_swab32(inode->i_block[i]);
1048 #endif
1049
1050                 inode->i_flags &= ~(EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL);
1051                 dirty = 1;
1052                 goto out;
1053         }
1054
1055         /* Oh well, just clear the busted inode. */
1056         if (fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_INODE, pctx)) {
1057                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1058                 return -1;
1059         }
1060
1061 out:
1062         if (dirty)
1063                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1064
1065         return 0;
1066 }
1067
1068 static void pass1_readahead(e2fsck_t ctx, dgrp_t *group, ext2_ino_t *next_ino)
1069 {
1070         ext2_ino_t inodes_in_group = 0, inodes_per_block, inodes_per_buffer;
1071         dgrp_t start = *group, grp;
1072         blk64_t blocks_to_read = 0;
1073         errcode_t err = EXT2_ET_INVALID_ARGUMENT;
1074
1075         if (ctx->readahead_kb == 0)
1076                 goto out;
1077
1078         /* Keep iterating groups until we have enough to readahead */
1079         inodes_per_block = EXT2_INODES_PER_BLOCK(ctx->fs->super);
1080         for (grp = start; grp < ctx->fs->group_desc_count; grp++) {
1081                 if (ext2fs_bg_flags_test(ctx->fs, grp, EXT2_BG_INODE_UNINIT))
1082                         continue;
1083                 inodes_in_group = ctx->fs->super->s_inodes_per_group -
1084                                         ext2fs_bg_itable_unused(ctx->fs, grp);
1085                 blocks_to_read += (inodes_in_group + inodes_per_block - 1) /
1086                                         inodes_per_block;
1087                 if (blocks_to_read * ctx->fs->blocksize >
1088                     ctx->readahead_kb * 1024)
1089                         break;
1090         }
1091
1092         err = e2fsck_readahead(ctx->fs, E2FSCK_READA_ITABLE, start,
1093                                grp - start + 1);
1094         if (err == EAGAIN) {
1095                 ctx->readahead_kb /= 2;
1096                 err = 0;
1097         }
1098
1099 out:
1100         if (err) {
1101                 /* Error; disable itable readahead */
1102                 *group = ctx->fs->group_desc_count;
1103                 *next_ino = ctx->fs->super->s_inodes_count;
1104         } else {
1105                 /*
1106                  * Don't do more readahead until we've reached the first inode
1107                  * of the last inode scan buffer block for the last group.
1108                  */
1109                 *group = grp + 1;
1110                 inodes_per_buffer = (ctx->inode_buffer_blocks ?
1111                                      ctx->inode_buffer_blocks :
1112                                      EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS) *
1113                                     ctx->fs->blocksize /
1114                                     EXT2_INODE_SIZE(ctx->fs->super);
1115                 inodes_in_group--;
1116                 *next_ino = inodes_in_group -
1117                             (inodes_in_group % inodes_per_buffer) + 1 +
1118                             (grp * ctx->fs->super->s_inodes_per_group);
1119         }
1120 }
1121
1122 /*
1123  * Check if the passed ino is one of the used superblock quota inodes.
1124  *
1125  * Before the quota inodes were journaled, older superblock quota inodes
1126  * were just regular files in the filesystem and not reserved inodes.  This
1127  * checks if the passed ino is one of the s_*_quota_inum superblock fields,
1128  * which may not always be the same as the EXT4_*_QUOTA_INO fields.
1129  */
1130 static int quota_inum_is_super(struct ext2_super_block *sb, ext2_ino_t ino)
1131 {
1132         enum quota_type qtype;
1133
1134         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1135                 if (*quota_sb_inump(sb, qtype) == ino)
1136                         return 1;
1137
1138         return 0;
1139 }
1140
1141 /*
1142  * Check if the passed ino is one of the reserved quota inodes.
1143  * This checks if the inode number is one of the reserved EXT4_*_QUOTA_INO
1144  * inodes.  These inodes may or may not be in use by the quota feature.
1145  */
1146 static int quota_inum_is_reserved(ext2_filsys fs, ext2_ino_t ino)
1147 {
1148         enum quota_type qtype;
1149
1150         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1151                 if (quota_type2inum(qtype, fs->super) == ino)
1152                         return 1;
1153
1154         return 0;
1155 }
1156
1157 void e2fsck_pass1(e2fsck_t ctx)
1158 {
1159         int     i;
1160         __u64   max_sizes;
1161         ext2_filsys fs = ctx->fs;
1162         ext2_ino_t      ino = 0;
1163         struct ext2_inode *inode = NULL;
1164         ext2_inode_scan scan = NULL;
1165         char            *block_buf = NULL;
1166 #ifdef RESOURCE_TRACK
1167         struct resource_track   rtrack;
1168 #endif
1169         unsigned char   frag, fsize;
1170         struct          problem_context pctx;
1171         struct          scan_callback_struct scan_struct;
1172         struct ext2_super_block *sb = ctx->fs->super;
1173         const char      *old_op;
1174         int             imagic_fs, extent_fs, inlinedata_fs;
1175         int             low_dtime_check = 1;
1176         int             inode_size = EXT2_INODE_SIZE(fs->super);
1177         int             bufsize;
1178         int             failed_csum = 0;
1179         ext2_ino_t      ino_threshold = 0;
1180         dgrp_t          ra_group = 0;
1181         struct ea_quota ea_ibody_quota;
1182
1183         init_resource_track(&rtrack, ctx->fs->io);
1184         clear_problem_context(&pctx);
1185
1186         /* If we can do readahead, figure out how many groups to pull in. */
1187         if (!e2fsck_can_readahead(ctx->fs))
1188                 ctx->readahead_kb = 0;
1189         else if (ctx->readahead_kb == ~0ULL)
1190                 ctx->readahead_kb = e2fsck_guess_readahead(ctx->fs);
1191         pass1_readahead(ctx, &ra_group, &ino_threshold);
1192
1193         if (!(ctx->options & E2F_OPT_PREEN))
1194                 fix_problem(ctx, PR_1_PASS_HEADER, &pctx);
1195
1196         if (ext2fs_has_feature_dir_index(fs->super) &&
1197             !(ctx->options & E2F_OPT_NO)) {
1198                 if (ext2fs_u32_list_create(&ctx->dirs_to_hash, 50))
1199                         ctx->dirs_to_hash = 0;
1200         }
1201
1202 #ifdef MTRACE
1203         mtrace_print("Pass 1");
1204 #endif
1205
1206 #define EXT2_BPP(bits) (1ULL << ((bits) - 2))
1207
1208         for (i = EXT2_MIN_BLOCK_LOG_SIZE; i <= EXT2_MAX_BLOCK_LOG_SIZE; i++) {
1209                 max_sizes = EXT2_NDIR_BLOCKS + EXT2_BPP(i);
1210                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i);
1211                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i) * EXT2_BPP(i);
1212                 max_sizes = (max_sizes * (1UL << i));
1213                 ext2_max_sizes[i - EXT2_MIN_BLOCK_LOG_SIZE] = max_sizes;
1214         }
1215 #undef EXT2_BPP
1216
1217         imagic_fs = ext2fs_has_feature_imagic_inodes(sb);
1218         extent_fs = ext2fs_has_feature_extents(sb);
1219         inlinedata_fs = ext2fs_has_feature_inline_data(sb);
1220
1221         /*
1222          * Allocate bitmaps structures
1223          */
1224         pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("in-use inode map"),
1225                                                     EXT2FS_BMAP64_RBTREE,
1226                                                     "inode_used_map",
1227                                                     &ctx->inode_used_map);
1228         if (pctx.errcode) {
1229                 pctx.num = 1;
1230                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1231                 ctx->flags |= E2F_FLAG_ABORT;
1232                 return;
1233         }
1234         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1235                         _("directory inode map"),
1236                         EXT2FS_BMAP64_AUTODIR,
1237                         "inode_dir_map", &ctx->inode_dir_map);
1238         if (pctx.errcode) {
1239                 pctx.num = 2;
1240                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1241                 ctx->flags |= E2F_FLAG_ABORT;
1242                 return;
1243         }
1244         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1245                         _("regular file inode map"), EXT2FS_BMAP64_RBTREE,
1246                         "inode_reg_map", &ctx->inode_reg_map);
1247         if (pctx.errcode) {
1248                 pctx.num = 6;
1249                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1250                 ctx->flags |= E2F_FLAG_ABORT;
1251                 return;
1252         }
1253         pctx.errcode = e2fsck_allocate_subcluster_bitmap(fs,
1254                         _("in-use block map"), EXT2FS_BMAP64_RBTREE,
1255                         "block_found_map", &ctx->block_found_map);
1256         if (pctx.errcode) {
1257                 pctx.num = 1;
1258                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1259                 ctx->flags |= E2F_FLAG_ABORT;
1260                 return;
1261         }
1262         pctx.errcode = e2fsck_allocate_block_bitmap(fs,
1263                         _("metadata block map"), EXT2FS_BMAP64_RBTREE,
1264                         "block_metadata_map", &ctx->block_metadata_map);
1265         if (pctx.errcode) {
1266                 pctx.num = 1;
1267                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1268                 ctx->flags |= E2F_FLAG_ABORT;
1269                 return;
1270         }
1271         pctx.errcode = e2fsck_setup_icount(ctx, "inode_link_info", 0, NULL,
1272                                            &ctx->inode_link_info);
1273         if (pctx.errcode) {
1274                 fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
1275                 ctx->flags |= E2F_FLAG_ABORT;
1276                 return;
1277         }
1278         bufsize = inode_size;
1279         if (bufsize < sizeof(struct ext2_inode_large))
1280                 bufsize = sizeof(struct ext2_inode_large);
1281         inode = (struct ext2_inode *)
1282                 e2fsck_allocate_memory(ctx, bufsize, "scratch inode");
1283
1284         inodes_to_process = (struct process_inode_block *)
1285                 e2fsck_allocate_memory(ctx,
1286                                        (ctx->process_inode_size *
1287                                         sizeof(struct process_inode_block)),
1288                                        "array of inodes to process");
1289         process_inode_count = 0;
1290
1291         pctx.errcode = ext2fs_init_dblist(fs, 0);
1292         if (pctx.errcode) {
1293                 fix_problem(ctx, PR_1_ALLOCATE_DBCOUNT, &pctx);
1294                 ctx->flags |= E2F_FLAG_ABORT;
1295                 goto endit;
1296         }
1297
1298         /*
1299          * If the last orphan field is set, clear it, since the pass1
1300          * processing will automatically find and clear the orphans.
1301          * In the future, we may want to try using the last_orphan
1302          * linked list ourselves, but for now, we clear it so that the
1303          * ext3 mount code won't get confused.
1304          */
1305         if (!(ctx->options & E2F_OPT_READONLY)) {
1306                 if (fs->super->s_last_orphan) {
1307                         fs->super->s_last_orphan = 0;
1308                         ext2fs_mark_super_dirty(fs);
1309                 }
1310         }
1311
1312         mark_table_blocks(ctx);
1313         pctx.errcode = ext2fs_convert_subcluster_bitmap(fs,
1314                                                 &ctx->block_found_map);
1315         if (pctx.errcode) {
1316                 fix_problem(ctx, PR_1_CONVERT_SUBCLUSTER, &pctx);
1317                 ctx->flags |= E2F_FLAG_ABORT;
1318                 goto endit;
1319         }
1320         block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3,
1321                                                     "block interate buffer");
1322         if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
1323                 e2fsck_use_inode_shortcuts(ctx, 1);
1324         e2fsck_intercept_block_allocations(ctx);
1325         old_op = ehandler_operation(_("opening inode scan"));
1326         pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks,
1327                                               &scan);
1328         ehandler_operation(old_op);
1329         if (pctx.errcode) {
1330                 fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1331                 ctx->flags |= E2F_FLAG_ABORT;
1332                 goto endit;
1333         }
1334         ext2fs_inode_scan_flags(scan, EXT2_SF_SKIP_MISSING_ITABLE |
1335                                       EXT2_SF_WARN_GARBAGE_INODES, 0);
1336         ctx->stashed_inode = inode;
1337         scan_struct.ctx = ctx;
1338         scan_struct.block_buf = block_buf;
1339         ext2fs_set_inode_callback(scan, scan_callback, &scan_struct);
1340         if (ctx->progress && ((ctx->progress)(ctx, 1, 0,
1341                                               ctx->fs->group_desc_count)))
1342                 goto endit;
1343         if ((fs->super->s_wtime < fs->super->s_inodes_count) ||
1344             (fs->super->s_mtime < fs->super->s_inodes_count) ||
1345             (fs->super->s_mkfs_time &&
1346              fs->super->s_mkfs_time < fs->super->s_inodes_count))
1347                 low_dtime_check = 0;
1348
1349         if (ext2fs_has_feature_mmp(fs->super) &&
1350             fs->super->s_mmp_block > fs->super->s_first_data_block &&
1351             fs->super->s_mmp_block < ext2fs_blocks_count(fs->super))
1352                 ext2fs_mark_block_bitmap2(ctx->block_found_map,
1353                                           fs->super->s_mmp_block);
1354
1355         /* Set up ctx->lost_and_found if possible */
1356         (void) e2fsck_get_lost_and_found(ctx, 0);
1357
1358         while (1) {
1359                 if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
1360                         if (e2fsck_mmp_update(fs))
1361                                 fatal_error(ctx, 0);
1362                 }
1363                 old_op = ehandler_operation(_("getting next inode from scan"));
1364                 pctx.errcode = ext2fs_get_next_inode_full(scan, &ino,
1365                                                           inode, inode_size);
1366                 if (ino > ino_threshold)
1367                         pass1_readahead(ctx, &ra_group, &ino_threshold);
1368                 ehandler_operation(old_op);
1369                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1370                         goto endit;
1371                 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) {
1372                         /*
1373                          * If badblocks says badblocks is bad, offer to clear
1374                          * the list, update the in-core bb list, and restart
1375                          * the inode scan.
1376                          */
1377                         if (ino == EXT2_BAD_INO &&
1378                             fix_problem(ctx, PR_1_BADBLOCKS_IN_BADBLOCKS,
1379                                         &pctx)) {
1380                                 errcode_t err;
1381
1382                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1383                                 ext2fs_badblocks_list_free(ctx->fs->badblocks);
1384                                 ctx->fs->badblocks = NULL;
1385                                 err = ext2fs_read_bb_inode(ctx->fs,
1386                                                         &ctx->fs->badblocks);
1387                                 if (err) {
1388                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1389                                                     &pctx);
1390                                         ctx->flags |= E2F_FLAG_ABORT;
1391                                         goto endit;
1392                                 }
1393                                 err = ext2fs_inode_scan_goto_blockgroup(scan,
1394                                                                         0);
1395                                 if (err) {
1396                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1397                                                     &pctx);
1398                                         ctx->flags |= E2F_FLAG_ABORT;
1399                                         goto endit;
1400                                 }
1401                                 continue;
1402                         }
1403                         if (!ctx->inode_bb_map)
1404                                 alloc_bb_map(ctx);
1405                         ext2fs_mark_inode_bitmap2(ctx->inode_bb_map, ino);
1406                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1407                         continue;
1408                 }
1409                 if (pctx.errcode &&
1410                     pctx.errcode != EXT2_ET_INODE_CSUM_INVALID &&
1411                     pctx.errcode != EXT2_ET_INODE_IS_GARBAGE) {
1412                         fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1413                         ctx->flags |= E2F_FLAG_ABORT;
1414                         goto endit;
1415                 }
1416                 if (!ino)
1417                         break;
1418                 pctx.ino = ino;
1419                 pctx.inode = inode;
1420                 ctx->stashed_ino = ino;
1421
1422                 /* Clear trashed inode? */
1423                 if (pctx.errcode == EXT2_ET_INODE_IS_GARBAGE &&
1424                     inode->i_links_count > 0 &&
1425                     fix_problem(ctx, PR_1_INODE_IS_GARBAGE, &pctx)) {
1426                         pctx.errcode = 0;
1427                         e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1428                 }
1429                 failed_csum = pctx.errcode != 0;
1430
1431                 /*
1432                  * Check for inodes who might have been part of the
1433                  * orphaned list linked list.  They should have gotten
1434                  * dealt with by now, unless the list had somehow been
1435                  * corrupted.
1436                  *
1437                  * FIXME: In the future, inodes which are still in use
1438                  * (and which are therefore) pending truncation should
1439                  * be handled specially.  Right now we just clear the
1440                  * dtime field, and the normal e2fsck handling of
1441                  * inodes where i_size and the inode blocks are
1442                  * inconsistent is to fix i_size, instead of releasing
1443                  * the extra blocks.  This won't catch the inodes that
1444                  * was at the end of the orphan list, but it's better
1445                  * than nothing.  The right answer is that there
1446                  * shouldn't be any bugs in the orphan list handling.  :-)
1447                  */
1448                 if (inode->i_dtime && low_dtime_check &&
1449                     inode->i_dtime < ctx->fs->super->s_inodes_count) {
1450                         if (fix_problem(ctx, PR_1_LOW_DTIME, &pctx)) {
1451                                 inode->i_dtime = inode->i_links_count ?
1452                                         0 : ctx->now;
1453                                 e2fsck_write_inode(ctx, ino, inode,
1454                                                    "pass1");
1455                                 failed_csum = 0;
1456                         }
1457                 }
1458
1459                 if (inode->i_links_count) {
1460                         pctx.errcode = ext2fs_icount_store(ctx->inode_link_info,
1461                                            ino, inode->i_links_count);
1462                         if (pctx.errcode) {
1463                                 pctx.num = inode->i_links_count;
1464                                 fix_problem(ctx, PR_1_ICOUNT_STORE, &pctx);
1465                                 ctx->flags |= E2F_FLAG_ABORT;
1466                                 goto endit;
1467                         }
1468                 } else if ((ino >= EXT2_FIRST_INODE(fs->super)) &&
1469                            !quota_inum_is_reserved(fs, ino)) {
1470                         if (!inode->i_dtime && inode->i_mode) {
1471                                 if (fix_problem(ctx,
1472                                             PR_1_ZERO_DTIME, &pctx)) {
1473                                         inode->i_dtime = ctx->now;
1474                                         e2fsck_write_inode(ctx, ino, inode,
1475                                                            "pass1");
1476                                         failed_csum = 0;
1477                                 }
1478                         }
1479                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1480                         continue;
1481                 }
1482
1483                 /* Conflicting inlinedata/extents inode flags? */
1484                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
1485                     (inode->i_flags & EXT4_EXTENTS_FL)) {
1486                         int res = fix_inline_data_extents_file(ctx, ino, inode,
1487                                                                inode_size,
1488                                                                &pctx);
1489                         if (res < 0) {
1490                                 /* skip FINISH_INODE_LOOP */
1491                                 continue;
1492                         }
1493                 }
1494
1495                 /* Test for incorrect inline_data flags settings. */
1496                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && !inlinedata_fs &&
1497                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1498                         size_t size = 0;
1499
1500                         pctx.errcode = ext2fs_inline_data_size(fs, ino, &size);
1501                         if (!pctx.errcode && size &&
1502                             fix_problem(ctx, PR_1_INLINE_DATA_FEATURE, &pctx)) {
1503                                 ext2fs_set_feature_inline_data(sb);
1504                                 ext2fs_mark_super_dirty(fs);
1505                                 inlinedata_fs = 1;
1506                         } else if (fix_problem(ctx, PR_1_INLINE_DATA_SET, &pctx)) {
1507                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1508                                 /* skip FINISH_INODE_LOOP */
1509                                 continue;
1510                         }
1511                 }
1512
1513                 /* Test for inline data flag but no attr */
1514                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && inlinedata_fs &&
1515                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1516                         size_t size = 0;
1517                         errcode_t err;
1518                         int flags;
1519
1520                         flags = fs->flags;
1521                         if (failed_csum)
1522                                 fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1523                         err = get_inline_data_ea_size(fs, ino, &size);
1524                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1525                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1526
1527                         switch (err) {
1528                         case 0:
1529                                 /* Everything is awesome... */
1530                                 break;
1531                         case EXT2_ET_BAD_EA_BLOCK_NUM:
1532                         case EXT2_ET_BAD_EA_HASH:
1533                         case EXT2_ET_BAD_EA_HEADER:
1534                         case EXT2_ET_EA_BAD_NAME_LEN:
1535                         case EXT2_ET_EA_BAD_VALUE_SIZE:
1536                         case EXT2_ET_EA_KEY_NOT_FOUND:
1537                         case EXT2_ET_EA_NO_SPACE:
1538                         case EXT2_ET_MISSING_EA_FEATURE:
1539                         case EXT2_ET_INLINE_DATA_CANT_ITERATE:
1540                         case EXT2_ET_INLINE_DATA_NO_BLOCK:
1541                         case EXT2_ET_INLINE_DATA_NO_SPACE:
1542                         case EXT2_ET_NO_INLINE_DATA:
1543                         case EXT2_ET_EXT_ATTR_CSUM_INVALID:
1544                         case EXT2_ET_EA_BAD_VALUE_OFFSET:
1545                                 /* broken EA or no system.data EA; truncate */
1546                                 if (fix_problem(ctx, PR_1_INLINE_DATA_NO_ATTR,
1547                                                 &pctx)) {
1548                                         err = ext2fs_inode_size_set(fs, inode, 0);
1549                                         if (err) {
1550                                                 pctx.errcode = err;
1551                                                 ctx->flags |= E2F_FLAG_ABORT;
1552                                                 goto endit;
1553                                         }
1554                                         inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1555                                         memset(&inode->i_block, 0,
1556                                                sizeof(inode->i_block));
1557                                         e2fsck_write_inode(ctx, ino, inode,
1558                                                            "pass1");
1559                                         failed_csum = 0;
1560                                 }
1561                                 break;
1562                         default:
1563                                 /* Some other kind of non-xattr error? */
1564                                 pctx.errcode = err;
1565                                 ctx->flags |= E2F_FLAG_ABORT;
1566                                 goto endit;
1567                         }
1568                 }
1569
1570                 /*
1571                  * Test for incorrect extent flag settings.
1572                  *
1573                  * On big-endian machines we must be careful:
1574                  * When the inode is read, the i_block array is not swapped
1575                  * if the extent flag is set.  Therefore if we are testing
1576                  * for or fixing a wrongly-set flag, we must potentially
1577                  * (un)swap before testing, or after fixing.
1578                  */
1579
1580                 /*
1581                  * In this case the extents flag was set when read, so
1582                  * extent_header_verify is ok.  If the inode is cleared,
1583                  * no need to swap... so no extra swapping here.
1584                  */
1585                 if ((inode->i_flags & EXT4_EXTENTS_FL) && !extent_fs &&
1586                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1587                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO))) {
1588                         if ((ext2fs_extent_header_verify(inode->i_block,
1589                                                  sizeof(inode->i_block)) == 0) &&
1590                             fix_problem(ctx, PR_1_EXTENT_FEATURE, &pctx)) {
1591                                 ext2fs_set_feature_extents(sb);
1592                                 ext2fs_mark_super_dirty(fs);
1593                                 extent_fs = 1;
1594                         } else if (fix_problem(ctx, PR_1_EXTENTS_SET, &pctx)) {
1595                         clear_inode:
1596                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1597                                 if (ino == EXT2_BAD_INO)
1598                                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map,
1599                                                                  ino);
1600                                 /* skip FINISH_INODE_LOOP */
1601                                 continue;
1602                         }
1603                 }
1604
1605                 /*
1606                  * For big-endian machines:
1607                  * If the inode didn't have the extents flag set when it
1608                  * was read, then the i_blocks array was swapped.  To test
1609                  * as an extents header, we must swap it back first.
1610                  * IF we then set the extents flag, the entire i_block
1611                  * array must be un/re-swapped to make it proper extents data.
1612                  */
1613                 if (extent_fs && !(inode->i_flags & EXT4_EXTENTS_FL) &&
1614                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1615                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO)) &&
1616                     (LINUX_S_ISREG(inode->i_mode) ||
1617                      LINUX_S_ISDIR(inode->i_mode))) {
1618                         void *ehp;
1619 #ifdef WORDS_BIGENDIAN
1620                         __u32 tmp_block[EXT2_N_BLOCKS];
1621
1622                         for (i = 0; i < EXT2_N_BLOCKS; i++)
1623                                 tmp_block[i] = ext2fs_swab32(inode->i_block[i]);
1624                         ehp = tmp_block;
1625 #else
1626                         ehp = inode->i_block;
1627 #endif
1628                         if ((ext2fs_extent_header_verify(ehp,
1629                                          sizeof(inode->i_block)) == 0) &&
1630                             (fix_problem(ctx, PR_1_UNSET_EXTENT_FL, &pctx))) {
1631                                 inode->i_flags |= EXT4_EXTENTS_FL;
1632 #ifdef WORDS_BIGENDIAN
1633                                 memcpy(inode->i_block, tmp_block,
1634                                        sizeof(inode->i_block));
1635 #endif
1636                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1637                                 failed_csum = 0;
1638                         }
1639                 }
1640
1641                 if (ino == EXT2_BAD_INO) {
1642                         struct process_block_struct pb;
1643
1644                         if ((failed_csum || inode->i_mode || inode->i_uid ||
1645                              inode->i_gid || inode->i_links_count ||
1646                              (inode->i_flags & EXT4_INLINE_DATA_FL) ||
1647                              inode->i_file_acl) &&
1648                             fix_problem(ctx, PR_1_INVALID_BAD_INODE, &pctx)) {
1649                                 memset(inode, 0, sizeof(struct ext2_inode));
1650                                 e2fsck_write_inode(ctx, ino, inode,
1651                                                    "clear bad inode");
1652                                 failed_csum = 0;
1653                         }
1654
1655                         pctx.errcode = ext2fs_copy_bitmap(ctx->block_found_map,
1656                                                           &pb.fs_meta_blocks);
1657                         if (pctx.errcode) {
1658                                 pctx.num = 4;
1659                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1660                                 ctx->flags |= E2F_FLAG_ABORT;
1661                                 goto endit;
1662                         }
1663                         pb.ino = EXT2_BAD_INO;
1664                         pb.num_blocks = pb.last_block = 0;
1665                         pb.last_db_block = -1;
1666                         pb.num_illegal_blocks = 0;
1667                         pb.suppress = 0; pb.clear = 0; pb.is_dir = 0;
1668                         pb.is_reg = 0; pb.fragmented = 0; pb.bbcheck = 0;
1669                         pb.inode = inode;
1670                         pb.pctx = &pctx;
1671                         pb.ctx = ctx;
1672                         pctx.errcode = ext2fs_block_iterate3(fs, ino, 0,
1673                                      block_buf, process_bad_block, &pb);
1674                         ext2fs_free_block_bitmap(pb.fs_meta_blocks);
1675                         if (pctx.errcode) {
1676                                 fix_problem(ctx, PR_1_BLOCK_ITERATE, &pctx);
1677                                 ctx->flags |= E2F_FLAG_ABORT;
1678                                 goto endit;
1679                         }
1680                         if (pb.bbcheck)
1681                                 if (!fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK_PROMPT, &pctx)) {
1682                                 ctx->flags |= E2F_FLAG_ABORT;
1683                                 goto endit;
1684                         }
1685                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1686                         clear_problem_context(&pctx);
1687                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1688                         continue;
1689                 } else if (ino == EXT2_ROOT_INO) {
1690                         /*
1691                          * Make sure the root inode is a directory; if
1692                          * not, offer to clear it.  It will be
1693                          * regenerated in pass #3.
1694                          */
1695                         if (!LINUX_S_ISDIR(inode->i_mode)) {
1696                                 if (fix_problem(ctx, PR_1_ROOT_NO_DIR, &pctx))
1697                                         goto clear_inode;
1698                         }
1699                         /*
1700                          * If dtime is set, offer to clear it.  mke2fs
1701                          * version 0.2b created filesystems with the
1702                          * dtime field set for the root and lost+found
1703                          * directories.  We won't worry about
1704                          * /lost+found, since that can be regenerated
1705                          * easily.  But we will fix the root directory
1706                          * as a special case.
1707                          */
1708                         if (inode->i_dtime && inode->i_links_count) {
1709                                 if (fix_problem(ctx, PR_1_ROOT_DTIME, &pctx)) {
1710                                         inode->i_dtime = 0;
1711                                         e2fsck_write_inode(ctx, ino, inode,
1712                                                            "pass1");
1713                                         failed_csum = 0;
1714                                 }
1715                         }
1716                 } else if (ino == EXT2_JOURNAL_INO) {
1717                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1718                         if (fs->super->s_journal_inum == EXT2_JOURNAL_INO) {
1719                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1720                                     fix_problem(ctx, PR_1_JOURNAL_BAD_MODE,
1721                                                 &pctx)) {
1722                                         inode->i_mode = LINUX_S_IFREG;
1723                                         e2fsck_write_inode(ctx, ino, inode,
1724                                                            "pass1");
1725                                         failed_csum = 0;
1726                                 }
1727                                 check_blocks(ctx, &pctx, block_buf, NULL);
1728                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1729                                 continue;
1730                         }
1731                         if ((inode->i_links_count ||
1732                              inode->i_blocks || inode->i_block[0]) &&
1733                             fix_problem(ctx, PR_1_JOURNAL_INODE_NOT_CLEAR,
1734                                         &pctx)) {
1735                                 memset(inode, 0, inode_size);
1736                                 ext2fs_icount_store(ctx->inode_link_info,
1737                                                     ino, 0);
1738                                 e2fsck_write_inode_full(ctx, ino, inode,
1739                                                         inode_size, "pass1");
1740                                 failed_csum = 0;
1741                         }
1742                 } else if (quota_inum_is_reserved(fs, ino)) {
1743                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1744                         if (ext2fs_has_feature_quota(fs->super) &&
1745                             quota_inum_is_super(fs->super, ino)) {
1746                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1747                                     fix_problem(ctx, PR_1_QUOTA_BAD_MODE,
1748                                                         &pctx)) {
1749                                         inode->i_mode = LINUX_S_IFREG;
1750                                         e2fsck_write_inode(ctx, ino, inode,
1751                                                         "pass1");
1752                                         failed_csum = 0;
1753                                 }
1754                                 check_blocks(ctx, &pctx, block_buf, NULL);
1755                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1756                                 continue;
1757                         }
1758                         if ((inode->i_links_count ||
1759                              inode->i_blocks || inode->i_block[0]) &&
1760                             fix_problem(ctx, PR_1_QUOTA_INODE_NOT_CLEAR,
1761                                         &pctx)) {
1762                                 memset(inode, 0, inode_size);
1763                                 ext2fs_icount_store(ctx->inode_link_info,
1764                                                     ino, 0);
1765                                 e2fsck_write_inode_full(ctx, ino, inode,
1766                                                         inode_size, "pass1");
1767                                 failed_csum = 0;
1768                         }
1769                 } else if (ino < EXT2_FIRST_INODE(fs->super)) {
1770                         problem_t problem = 0;
1771
1772                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1773                         if (ino == EXT2_BOOT_LOADER_INO) {
1774                                 if (LINUX_S_ISDIR(inode->i_mode))
1775                                         problem = PR_1_RESERVED_BAD_MODE;
1776                         } else if (ino == EXT2_RESIZE_INO) {
1777                                 if (inode->i_mode &&
1778                                     !LINUX_S_ISREG(inode->i_mode))
1779                                         problem = PR_1_RESERVED_BAD_MODE;
1780                         } else {
1781                                 if (inode->i_mode != 0)
1782                                         problem = PR_1_RESERVED_BAD_MODE;
1783                         }
1784                         if (problem) {
1785                                 if (fix_problem(ctx, problem, &pctx)) {
1786                                         inode->i_mode = 0;
1787                                         e2fsck_write_inode(ctx, ino, inode,
1788                                                            "pass1");
1789                                         failed_csum = 0;
1790                                 }
1791                         }
1792                         check_blocks(ctx, &pctx, block_buf, NULL);
1793                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1794                         continue;
1795                 }
1796
1797                 if (!inode->i_links_count) {
1798                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1799                         continue;
1800                 }
1801                 /*
1802                  * n.b.  0.3c ext2fs code didn't clear i_links_count for
1803                  * deleted files.  Oops.
1804                  *
1805                  * Since all new ext2 implementations get this right,
1806                  * we now assume that the case of non-zero
1807                  * i_links_count and non-zero dtime means that we
1808                  * should keep the file, not delete it.
1809                  *
1810                  */
1811                 if (inode->i_dtime) {
1812                         if (fix_problem(ctx, PR_1_SET_DTIME, &pctx)) {
1813                                 inode->i_dtime = 0;
1814                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1815                                 failed_csum = 0;
1816                         }
1817                 }
1818
1819                 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1820                 switch (fs->super->s_creator_os) {
1821                     case EXT2_OS_HURD:
1822                         frag = inode->osd2.hurd2.h_i_frag;
1823                         fsize = inode->osd2.hurd2.h_i_fsize;
1824                         break;
1825                     default:
1826                         frag = fsize = 0;
1827                 }
1828
1829                 if (inode->i_faddr || frag || fsize ||
1830                     (!ext2fs_has_feature_largedir(fs->super) &&
1831                     (LINUX_S_ISDIR(inode->i_mode) && inode->i_size_high)))
1832                         mark_inode_bad(ctx, ino);
1833                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1834                     !ext2fs_has_feature_64bit(fs->super) &&
1835                     inode->osd2.linux2.l_i_file_acl_high != 0)
1836                         mark_inode_bad(ctx, ino);
1837                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1838                     !ext2fs_has_feature_huge_file(fs->super) &&
1839                     (inode->osd2.linux2.l_i_blocks_hi != 0))
1840                         mark_inode_bad(ctx, ino);
1841                 if (inode->i_flags & EXT2_IMAGIC_FL) {
1842                         if (imagic_fs) {
1843                                 if (!ctx->inode_imagic_map)
1844                                         alloc_imagic_map(ctx);
1845                                 ext2fs_mark_inode_bitmap2(ctx->inode_imagic_map,
1846                                                          ino);
1847                         } else {
1848                                 if (fix_problem(ctx, PR_1_SET_IMAGIC, &pctx)) {
1849                                         inode->i_flags &= ~EXT2_IMAGIC_FL;
1850                                         e2fsck_write_inode(ctx, ino,
1851                                                            inode, "pass1");
1852                                         failed_csum = 0;
1853                                 }
1854                         }
1855                 }
1856
1857                 check_inode_extra_space(ctx, &pctx, &ea_ibody_quota);
1858                 check_is_really_dir(ctx, &pctx, block_buf);
1859
1860                 /*
1861                  * ext2fs_inode_has_valid_blocks2 does not actually look
1862                  * at i_block[] values, so not endian-sensitive here.
1863                  */
1864                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL) &&
1865                     LINUX_S_ISLNK(inode->i_mode) &&
1866                     !ext2fs_inode_has_valid_blocks2(fs, inode) &&
1867                     fix_problem(ctx, PR_1_FAST_SYMLINK_EXTENT_FL, &pctx)) {
1868                         inode->i_flags &= ~EXT4_EXTENTS_FL;
1869                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1870                         failed_csum = 0;
1871                 }
1872
1873                 if (LINUX_S_ISDIR(inode->i_mode)) {
1874                         ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
1875                         e2fsck_add_dir_info(ctx, ino, 0);
1876                         ctx->fs_directory_count++;
1877                         if (inode->i_flags & EXT4_ENCRYPT_FL)
1878                                 add_encrypted_dir(ctx, ino);
1879                 } else if (LINUX_S_ISREG (inode->i_mode)) {
1880                         ext2fs_mark_inode_bitmap2(ctx->inode_reg_map, ino);
1881                         ctx->fs_regular_count++;
1882                 } else if (LINUX_S_ISCHR (inode->i_mode) &&
1883                            e2fsck_pass1_check_device_inode(fs, inode)) {
1884                         check_extents_inlinedata(ctx, &pctx);
1885                         check_immutable(ctx, &pctx);
1886                         check_size(ctx, &pctx);
1887                         ctx->fs_chardev_count++;
1888                 } else if (LINUX_S_ISBLK (inode->i_mode) &&
1889                            e2fsck_pass1_check_device_inode(fs, inode)) {
1890                         check_extents_inlinedata(ctx, &pctx);
1891                         check_immutable(ctx, &pctx);
1892                         check_size(ctx, &pctx);
1893                         ctx->fs_blockdev_count++;
1894                 } else if (LINUX_S_ISLNK (inode->i_mode) &&
1895                            e2fsck_pass1_check_symlink(fs, ino, inode,
1896                                                       block_buf)) {
1897                         check_immutable(ctx, &pctx);
1898                         ctx->fs_symlinks_count++;
1899                         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
1900                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1901                                 continue;
1902                         } else if (ext2fs_is_fast_symlink(inode)) {
1903                                 ctx->fs_fast_symlinks_count++;
1904                                 check_blocks(ctx, &pctx, block_buf,
1905                                              &ea_ibody_quota);
1906                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1907                                 continue;
1908                         }
1909                 }
1910                 else if (LINUX_S_ISFIFO (inode->i_mode) &&
1911                          e2fsck_pass1_check_device_inode(fs, inode)) {
1912                         check_extents_inlinedata(ctx, &pctx);
1913                         check_immutable(ctx, &pctx);
1914                         check_size(ctx, &pctx);
1915                         ctx->fs_fifo_count++;
1916                 } else if ((LINUX_S_ISSOCK (inode->i_mode)) &&
1917                            e2fsck_pass1_check_device_inode(fs, inode)) {
1918                         check_extents_inlinedata(ctx, &pctx);
1919                         check_immutable(ctx, &pctx);
1920                         check_size(ctx, &pctx);
1921                         ctx->fs_sockets_count++;
1922                 } else
1923                         mark_inode_bad(ctx, ino);
1924                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1925                     !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
1926                         if (inode->i_block[EXT2_IND_BLOCK])
1927                                 ctx->fs_ind_count++;
1928                         if (inode->i_block[EXT2_DIND_BLOCK])
1929                                 ctx->fs_dind_count++;
1930                         if (inode->i_block[EXT2_TIND_BLOCK])
1931                                 ctx->fs_tind_count++;
1932                 }
1933                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1934                     !(inode->i_flags & EXT4_INLINE_DATA_FL) &&
1935                     (inode->i_block[EXT2_IND_BLOCK] ||
1936                      inode->i_block[EXT2_DIND_BLOCK] ||
1937                      inode->i_block[EXT2_TIND_BLOCK] ||
1938                      ext2fs_file_acl_block(fs, inode))) {
1939                         struct process_inode_block *itp;
1940
1941                         itp = &inodes_to_process[process_inode_count];
1942                         itp->ino = ino;
1943                         itp->ea_ibody_quota = ea_ibody_quota;
1944                         if (inode_size < sizeof(struct ext2_inode_large))
1945                                 memcpy(&itp->inode, inode, inode_size);
1946                         else
1947                                 memcpy(&itp->inode, inode, sizeof(itp->inode));
1948                         process_inode_count++;
1949                 } else
1950                         check_blocks(ctx, &pctx, block_buf, &ea_ibody_quota);
1951
1952                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1953
1954                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1955                         goto endit;
1956
1957                 if (process_inode_count >= ctx->process_inode_size) {
1958                         process_inodes(ctx, block_buf);
1959
1960                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1961                                 goto endit;
1962                 }
1963         }
1964         process_inodes(ctx, block_buf);
1965         ext2fs_close_inode_scan(scan);
1966         scan = NULL;
1967
1968         reserve_block_for_root_repair(ctx);
1969         reserve_block_for_lnf_repair(ctx);
1970
1971         /*
1972          * If any extended attribute blocks' reference counts need to
1973          * be adjusted, either up (ctx->refcount_extra), or down
1974          * (ctx->refcount), then fix them.
1975          */
1976         if (ctx->refcount) {
1977                 adjust_extattr_refcount(ctx, ctx->refcount, block_buf, -1);
1978                 ea_refcount_free(ctx->refcount);
1979                 ctx->refcount = 0;
1980         }
1981         if (ctx->refcount_extra) {
1982                 adjust_extattr_refcount(ctx, ctx->refcount_extra,
1983                                         block_buf, +1);
1984                 ea_refcount_free(ctx->refcount_extra);
1985                 ctx->refcount_extra = 0;
1986         }
1987
1988         if (ctx->ea_block_quota_blocks) {
1989                 ea_refcount_free(ctx->ea_block_quota_blocks);
1990                 ctx->ea_block_quota_blocks = 0;
1991         }
1992
1993         if (ctx->ea_block_quota_inodes) {
1994                 ea_refcount_free(ctx->ea_block_quota_inodes);
1995                 ctx->ea_block_quota_inodes = 0;
1996         }
1997
1998         if (ctx->invalid_bitmaps)
1999                 handle_fs_bad_blocks(ctx);
2000
2001         /* We don't need the block_ea_map any more */
2002         if (ctx->block_ea_map) {
2003                 ext2fs_free_block_bitmap(ctx->block_ea_map);
2004                 ctx->block_ea_map = 0;
2005         }
2006
2007         if (ctx->flags & E2F_FLAG_RESIZE_INODE) {
2008                 clear_problem_context(&pctx);
2009                 pctx.errcode = ext2fs_create_resize_inode(fs);
2010                 if (pctx.errcode) {
2011                         if (!fix_problem(ctx, PR_1_RESIZE_INODE_CREATE,
2012                                          &pctx)) {
2013                                 ctx->flags |= E2F_FLAG_ABORT;
2014                                 goto endit;
2015                         }
2016                         pctx.errcode = 0;
2017                 }
2018                 if (!pctx.errcode) {
2019                         e2fsck_read_inode(ctx, EXT2_RESIZE_INO, inode,
2020                                           "recreate inode");
2021                         inode->i_mtime = ctx->now;
2022                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, inode,
2023                                            "recreate inode");
2024                 }
2025                 ctx->flags &= ~E2F_FLAG_RESIZE_INODE;
2026         }
2027
2028         if (ctx->flags & E2F_FLAG_RESTART) {
2029                 /*
2030                  * Only the master copy of the superblock and block
2031                  * group descriptors are going to be written during a
2032                  * restart, so set the superblock to be used to be the
2033                  * master superblock.
2034                  */
2035                 ctx->use_superblock = 0;
2036                 unwind_pass1(fs);
2037                 goto endit;
2038         }
2039
2040         if (ctx->block_dup_map) {
2041                 if (ctx->options & E2F_OPT_PREEN) {
2042                         clear_problem_context(&pctx);
2043                         fix_problem(ctx, PR_1_DUP_BLOCKS_PREENSTOP, &pctx);
2044                 }
2045                 e2fsck_pass1_dupblocks(ctx, block_buf);
2046         }
2047         ctx->flags |= E2F_FLAG_ALLOC_OK;
2048         ext2fs_free_mem(&inodes_to_process);
2049 endit:
2050         e2fsck_use_inode_shortcuts(ctx, 0);
2051
2052         if (scan)
2053                 ext2fs_close_inode_scan(scan);
2054         if (block_buf)
2055                 ext2fs_free_mem(&block_buf);
2056         if (inode)
2057                 ext2fs_free_mem(&inode);
2058
2059         /*
2060          * The l+f inode may have been cleared, so zap it now and
2061          * later passes will recalculate it if necessary
2062          */
2063         ctx->lost_and_found = 0;
2064
2065         if ((ctx->flags & E2F_FLAG_SIGNAL_MASK) == 0)
2066                 print_resource_track(ctx, _("Pass 1"), &rtrack, ctx->fs->io);
2067         else
2068                 ctx->invalid_bitmaps++;
2069 }
2070 #undef FINISH_INODE_LOOP
2071
2072 /*
2073  * When the inode_scan routines call this callback at the end of the
2074  * glock group, call process_inodes.
2075  */
2076 static errcode_t scan_callback(ext2_filsys fs,
2077                                ext2_inode_scan scan EXT2FS_ATTR((unused)),
2078                                dgrp_t group, void * priv_data)
2079 {
2080         struct scan_callback_struct *scan_struct;
2081         e2fsck_t ctx;
2082
2083         scan_struct = (struct scan_callback_struct *) priv_data;
2084         ctx = scan_struct->ctx;
2085
2086         process_inodes((e2fsck_t) fs->priv_data, scan_struct->block_buf);
2087
2088         if (ctx->progress)
2089                 if ((ctx->progress)(ctx, 1, group+1,
2090                                     ctx->fs->group_desc_count))
2091                         return EXT2_ET_CANCEL_REQUESTED;
2092
2093         return 0;
2094 }
2095
2096 /*
2097  * Process the inodes in the "inodes to process" list.
2098  */
2099 static void process_inodes(e2fsck_t ctx, char *block_buf)
2100 {
2101         int                     i;
2102         struct ext2_inode       *old_stashed_inode;
2103         ext2_ino_t              old_stashed_ino;
2104         const char              *old_operation;
2105         char                    buf[80];
2106         struct problem_context  pctx;
2107
2108 #if 0
2109         printf("begin process_inodes: ");
2110 #endif
2111         if (process_inode_count == 0)
2112                 return;
2113         old_operation = ehandler_operation(0);
2114         old_stashed_inode = ctx->stashed_inode;
2115         old_stashed_ino = ctx->stashed_ino;
2116         qsort(inodes_to_process, process_inode_count,
2117                       sizeof(struct process_inode_block), process_inode_cmp);
2118         clear_problem_context(&pctx);
2119         for (i=0; i < process_inode_count; i++) {
2120                 pctx.inode = ctx->stashed_inode =
2121                         (struct ext2_inode *) &inodes_to_process[i].inode;
2122                 pctx.ino = ctx->stashed_ino = inodes_to_process[i].ino;
2123
2124 #if 0
2125                 printf("%u ", pctx.ino);
2126 #endif
2127                 sprintf(buf, _("reading indirect blocks of inode %u"),
2128                         pctx.ino);
2129                 ehandler_operation(buf);
2130                 check_blocks(ctx, &pctx, block_buf,
2131                              &inodes_to_process[i].ea_ibody_quota);
2132                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2133                         break;
2134         }
2135         ctx->stashed_inode = old_stashed_inode;
2136         ctx->stashed_ino = old_stashed_ino;
2137         process_inode_count = 0;
2138 #if 0
2139         printf("end process inodes\n");
2140 #endif
2141         ehandler_operation(old_operation);
2142 }
2143
2144 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b)
2145 {
2146         const struct process_inode_block *ib_a =
2147                 (const struct process_inode_block *) a;
2148         const struct process_inode_block *ib_b =
2149                 (const struct process_inode_block *) b;
2150         int     ret;
2151
2152         ret = (ib_a->inode.i_block[EXT2_IND_BLOCK] -
2153                ib_b->inode.i_block[EXT2_IND_BLOCK]);
2154         if (ret == 0)
2155                 /*
2156                  * We only call process_inodes() for non-extent
2157                  * inodes, so it's OK to pass NULL to
2158                  * ext2fs_file_acl_block() here.
2159                  */
2160                 ret = ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_a->inode)) -
2161                         ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_b->inode));
2162         if (ret == 0)
2163                 ret = ib_a->ino - ib_b->ino;
2164         return ret;
2165 }
2166
2167 /*
2168  * Mark an inode as being bad in some what
2169  */
2170 static void mark_inode_bad(e2fsck_t ctx, ino_t ino)
2171 {
2172         struct          problem_context pctx;
2173
2174         if (!ctx->inode_bad_map) {
2175                 clear_problem_context(&pctx);
2176
2177                 pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2178                                 _("bad inode map"), EXT2FS_BMAP64_RBTREE,
2179                                 "inode_bad_map", &ctx->inode_bad_map);
2180                 if (pctx.errcode) {
2181                         pctx.num = 3;
2182                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2183                         /* Should never get here */
2184                         ctx->flags |= E2F_FLAG_ABORT;
2185                         return;
2186                 }
2187         }
2188         ext2fs_mark_inode_bitmap2(ctx->inode_bad_map, ino);
2189 }
2190
2191 static void add_encrypted_dir(e2fsck_t ctx, ino_t ino)
2192 {
2193         struct          problem_context pctx;
2194
2195         if (!ctx->encrypted_dirs) {
2196                 pctx.errcode = ext2fs_u32_list_create(&ctx->encrypted_dirs, 0);
2197                 if (pctx.errcode)
2198                         goto error;
2199         }
2200         pctx.errcode = ext2fs_u32_list_add(ctx->encrypted_dirs, ino);
2201         if (pctx.errcode == 0)
2202                 return;
2203 error:
2204         fix_problem(ctx, PR_1_ALLOCATE_ENCRYPTED_DIRLIST, &pctx);
2205         /* Should never get here */
2206         ctx->flags |= E2F_FLAG_ABORT;
2207 }
2208
2209 /*
2210  * This procedure will allocate the inode "bb" (badblock) map table
2211  */
2212 static void alloc_bb_map(e2fsck_t ctx)
2213 {
2214         struct          problem_context pctx;
2215
2216         clear_problem_context(&pctx);
2217         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2218                         _("inode in bad block map"), EXT2FS_BMAP64_RBTREE,
2219                         "inode_bb_map", &ctx->inode_bb_map);
2220         if (pctx.errcode) {
2221                 pctx.num = 4;
2222                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2223                 /* Should never get here */
2224                 ctx->flags |= E2F_FLAG_ABORT;
2225                 return;
2226         }
2227 }
2228
2229 /*
2230  * This procedure will allocate the inode imagic table
2231  */
2232 static void alloc_imagic_map(e2fsck_t ctx)
2233 {
2234         struct          problem_context pctx;
2235
2236         clear_problem_context(&pctx);
2237         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2238                         _("imagic inode map"), EXT2FS_BMAP64_RBTREE,
2239                         "inode_imagic_map", &ctx->inode_imagic_map);
2240         if (pctx.errcode) {
2241                 pctx.num = 5;
2242                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2243                 /* Should never get here */
2244                 ctx->flags |= E2F_FLAG_ABORT;
2245                 return;
2246         }
2247 }
2248
2249 /*
2250  * Marks a block as in use, setting the dup_map if it's been set
2251  * already.  Called by process_block and process_bad_block.
2252  *
2253  * WARNING: Assumes checks have already been done to make sure block
2254  * is valid.  This is true in both process_block and process_bad_block.
2255  */
2256 static _INLINE_ void mark_block_used(e2fsck_t ctx, blk64_t block)
2257 {
2258         struct          problem_context pctx;
2259
2260         clear_problem_context(&pctx);
2261
2262         if (ext2fs_fast_test_block_bitmap2(ctx->block_found_map, block)) {
2263                 if (!ctx->block_dup_map) {
2264                         pctx.errcode = e2fsck_allocate_block_bitmap(ctx->fs,
2265                                         _("multiply claimed block map"),
2266                                         EXT2FS_BMAP64_RBTREE, "block_dup_map",
2267                                         &ctx->block_dup_map);
2268                         if (pctx.errcode) {
2269                                 pctx.num = 3;
2270                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR,
2271                                             &pctx);
2272                                 /* Should never get here */
2273                                 ctx->flags |= E2F_FLAG_ABORT;
2274                                 return;
2275                         }
2276                 }
2277                 ext2fs_fast_mark_block_bitmap2(ctx->block_dup_map, block);
2278         } else {
2279                 ext2fs_fast_mark_block_bitmap2(ctx->block_found_map, block);
2280         }
2281 }
2282
2283 /*
2284  * When cluster size is greater than one block, it is caller's responsibility
2285  * to make sure block parameter starts at a cluster boundary.
2286  */
2287 static _INLINE_ void mark_blocks_used(e2fsck_t ctx, blk64_t block,
2288                                       unsigned int num)
2289 {
2290         if (ext2fs_test_block_bitmap_range2(ctx->block_found_map, block, num))
2291                 ext2fs_mark_block_bitmap_range2(ctx->block_found_map, block, num);
2292         else {
2293                 int i;
2294                 for (i = 0; i < num; i += EXT2FS_CLUSTER_RATIO(ctx->fs))
2295                         mark_block_used(ctx, block + i);
2296         }
2297 }
2298
2299 /*
2300  * Adjust the extended attribute block's reference counts at the end
2301  * of pass 1, either by subtracting out references for EA blocks that
2302  * are still referenced in ctx->refcount, or by adding references for
2303  * EA blocks that had extra references as accounted for in
2304  * ctx->refcount_extra.
2305  */
2306 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
2307                                     char *block_buf, int adjust_sign)
2308 {
2309         struct ext2_ext_attr_header     *header;
2310         struct problem_context          pctx;
2311         ext2_filsys                     fs = ctx->fs;
2312         blk64_t                         blk;
2313         __u32                           should_be;
2314         ea_value_t                      count;
2315
2316         clear_problem_context(&pctx);
2317
2318         ea_refcount_intr_begin(refcount);
2319         while (1) {
2320                 if ((blk = ea_refcount_intr_next(refcount, &count)) == 0)
2321                         break;
2322                 pctx.blk = blk;
2323                 pctx.errcode = ext2fs_read_ext_attr3(fs, blk, block_buf,
2324                                                      pctx.ino);
2325                 if (pctx.errcode) {
2326                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
2327                         return;
2328                 }
2329                 header = (struct ext2_ext_attr_header *) block_buf;
2330                 pctx.blkcount = header->h_refcount;
2331                 should_be = header->h_refcount + adjust_sign * (int)count;
2332                 pctx.num = should_be;
2333                 if (fix_problem(ctx, PR_1_EXTATTR_REFCOUNT, &pctx)) {
2334                         header->h_refcount = should_be;
2335                         pctx.errcode = ext2fs_write_ext_attr3(fs, blk,
2336                                                              block_buf,
2337                                                              pctx.ino);
2338                         if (pctx.errcode) {
2339                                 fix_problem(ctx, PR_1_EXTATTR_WRITE_ABORT,
2340                                             &pctx);
2341                                 continue;
2342                         }
2343                 }
2344         }
2345 }
2346
2347 /*
2348  * Handle processing the extended attribute blocks
2349  */
2350 static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx,
2351                            char *block_buf, struct ea_quota *ea_block_quota)
2352 {
2353         ext2_filsys fs = ctx->fs;
2354         ext2_ino_t      ino = pctx->ino;
2355         struct ext2_inode *inode = pctx->inode;
2356         blk64_t         blk;
2357         char *          end;
2358         struct ext2_ext_attr_header *header;
2359         struct ext2_ext_attr_entry *first, *entry;
2360         blk64_t         quota_blocks = EXT2FS_C2B(fs, 1);
2361         __u64           quota_inodes = 0;
2362         region_t        region = 0;
2363         int             failed_csum = 0;
2364
2365         ea_block_quota->blocks = 0;
2366         ea_block_quota->inodes = 0;
2367
2368         blk = ext2fs_file_acl_block(fs, inode);
2369         if (blk == 0)
2370                 return 0;
2371
2372         /*
2373          * If the Extended attribute flag isn't set, then a non-zero
2374          * file acl means that the inode is corrupted.
2375          *
2376          * Or if the extended attribute block is an invalid block,
2377          * then the inode is also corrupted.
2378          */
2379         if (!ext2fs_has_feature_xattr(fs->super) ||
2380             (blk < fs->super->s_first_data_block) ||
2381             (blk >= ext2fs_blocks_count(fs->super))) {
2382                 mark_inode_bad(ctx, ino);
2383                 return 0;
2384         }
2385
2386         /* If ea bitmap hasn't been allocated, create it */
2387         if (!ctx->block_ea_map) {
2388                 pctx->errcode = e2fsck_allocate_block_bitmap(fs,
2389                                         _("ext attr block map"),
2390                                         EXT2FS_BMAP64_RBTREE, "block_ea_map",
2391                                         &ctx->block_ea_map);
2392                 if (pctx->errcode) {
2393                         pctx->num = 2;
2394                         fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, pctx);
2395                         ctx->flags |= E2F_FLAG_ABORT;
2396                         return 0;
2397                 }
2398         }
2399
2400         /* Create the EA refcount structure if necessary */
2401         if (!ctx->refcount) {
2402                 pctx->errcode = ea_refcount_create(0, &ctx->refcount);
2403                 if (pctx->errcode) {
2404                         pctx->num = 1;
2405                         fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2406                         ctx->flags |= E2F_FLAG_ABORT;
2407                         return 0;
2408                 }
2409         }
2410
2411 #if 0
2412         /* Debugging text */
2413         printf("Inode %u has EA block %u\n", ino, blk);
2414 #endif
2415
2416         /* Have we seen this EA block before? */
2417         if (ext2fs_fast_test_block_bitmap2(ctx->block_ea_map, blk)) {
2418                 ea_block_quota->blocks = EXT2FS_C2B(fs, 1);
2419                 ea_block_quota->inodes = 0;
2420
2421                 if (ctx->ea_block_quota_blocks) {
2422                         ea_refcount_fetch(ctx->ea_block_quota_blocks, blk,
2423                                           &quota_blocks);
2424                         if (quota_blocks)
2425                                 ea_block_quota->blocks = quota_blocks;
2426                 }
2427
2428                 if (ctx->ea_block_quota_inodes)
2429                         ea_refcount_fetch(ctx->ea_block_quota_inodes, blk,
2430                                           &ea_block_quota->inodes);
2431
2432                 if (ea_refcount_decrement(ctx->refcount, blk, 0) == 0)
2433                         return 1;
2434                 /* Ooops, this EA was referenced more than it stated */
2435                 if (!ctx->refcount_extra) {
2436                         pctx->errcode = ea_refcount_create(0,
2437                                            &ctx->refcount_extra);
2438                         if (pctx->errcode) {
2439                                 pctx->num = 2;
2440                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2441                                 ctx->flags |= E2F_FLAG_ABORT;
2442                                 return 0;
2443                         }
2444                 }
2445                 ea_refcount_increment(ctx->refcount_extra, blk, 0);
2446                 return 1;
2447         }
2448
2449         /*
2450          * OK, we haven't seen this EA block yet.  So we need to
2451          * validate it
2452          */
2453         pctx->blk = blk;
2454         pctx->errcode = ext2fs_read_ext_attr3(fs, blk, block_buf, pctx->ino);
2455         if (pctx->errcode == EXT2_ET_EXT_ATTR_CSUM_INVALID) {
2456                 pctx->errcode = 0;
2457                 failed_csum = 1;
2458         } else if (pctx->errcode == EXT2_ET_BAD_EA_HEADER)
2459                 pctx->errcode = 0;
2460
2461         if (pctx->errcode &&
2462             fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx)) {
2463                 pctx->errcode = 0;
2464                 goto clear_extattr;
2465         }
2466         header = (struct ext2_ext_attr_header *) block_buf;
2467         pctx->blk = ext2fs_file_acl_block(fs, inode);
2468         if (((ctx->ext_attr_ver == 1) &&
2469              (header->h_magic != EXT2_EXT_ATTR_MAGIC_v1)) ||
2470             ((ctx->ext_attr_ver == 2) &&
2471              (header->h_magic != EXT2_EXT_ATTR_MAGIC))) {
2472                 if (fix_problem(ctx, PR_1_BAD_EA_BLOCK, pctx))
2473                         goto clear_extattr;
2474         }
2475
2476         if (header->h_blocks != 1) {
2477                 if (fix_problem(ctx, PR_1_EA_MULTI_BLOCK, pctx))
2478                         goto clear_extattr;
2479         }
2480
2481         if (pctx->errcode && fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx))
2482                 goto clear_extattr;
2483
2484         region = region_create(0, fs->blocksize);
2485         if (!region) {
2486                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
2487                 ctx->flags |= E2F_FLAG_ABORT;
2488                 return 0;
2489         }
2490         if (region_allocate(region, 0, sizeof(struct ext2_ext_attr_header))) {
2491                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2492                         goto clear_extattr;
2493         }
2494
2495         first = (struct ext2_ext_attr_entry *)(header+1);
2496         end = block_buf + fs->blocksize;
2497         entry = first;
2498         while ((char *)entry < end && *(__u32 *)entry) {
2499                 __u32 hash;
2500
2501                 if (region_allocate(region, (char *)entry - (char *)header,
2502                                    EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
2503                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2504                                 goto clear_extattr;
2505                         break;
2506                 }
2507                 if ((ctx->ext_attr_ver == 1 &&
2508                      (entry->e_name_len == 0 || entry->e_name_index != 0)) ||
2509                     (ctx->ext_attr_ver == 2 &&
2510                      entry->e_name_index == 0)) {
2511                         if (fix_problem(ctx, PR_1_EA_BAD_NAME, pctx))
2512                                 goto clear_extattr;
2513                         break;
2514                 }
2515                 if (entry->e_value_inum == 0) {
2516                         if (entry->e_value_offs + entry->e_value_size >
2517                             fs->blocksize) {
2518                                 if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2519                                         goto clear_extattr;
2520                                 break;
2521                         }
2522                         if (entry->e_value_size &&
2523                             region_allocate(region, entry->e_value_offs,
2524                                             EXT2_EXT_ATTR_SIZE(entry->e_value_size))) {
2525                                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION,
2526                                                 pctx))
2527                                         goto clear_extattr;
2528                         }
2529
2530                         hash = ext2fs_ext_attr_hash_entry(entry, block_buf +
2531                                                           entry->e_value_offs);
2532
2533                         if (entry->e_hash != hash) {
2534                                 pctx->num = entry->e_hash;
2535                                 if (fix_problem(ctx, PR_1_ATTR_HASH, pctx))
2536                                         goto clear_extattr;
2537                                 entry->e_hash = hash;
2538                         }
2539                 } else {
2540                         problem_t problem;
2541                         blk64_t entry_quota_blocks;
2542
2543                         problem = check_large_ea_inode(ctx, entry, pctx,
2544                                                        &entry_quota_blocks);
2545                         if (problem && fix_problem(ctx, problem, pctx))
2546                                 goto clear_extattr;
2547
2548                         quota_blocks += entry_quota_blocks;
2549                         quota_inodes++;
2550                 }
2551
2552                 entry = EXT2_EXT_ATTR_NEXT(entry);
2553         }
2554         if (region_allocate(region, (char *)entry - (char *)header, 4)) {
2555                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2556                         goto clear_extattr;
2557         }
2558         region_free(region);
2559
2560         /*
2561          * We only get here if there was no other errors that were fixed.
2562          * If there was a checksum fail, ask to correct it.
2563          */
2564         if (failed_csum &&
2565             fix_problem(ctx, PR_1_EA_BLOCK_ONLY_CSUM_INVALID, pctx)) {
2566                 pctx->errcode = ext2fs_write_ext_attr3(fs, blk, block_buf,
2567                                                        pctx->ino);
2568                 if (pctx->errcode)
2569                         return 0;
2570         }
2571
2572         if (quota_blocks != EXT2FS_C2B(fs, 1)) {
2573                 if (!ctx->ea_block_quota_blocks) {
2574                         pctx->errcode = ea_refcount_create(0,
2575                                                 &ctx->ea_block_quota_blocks);
2576                         if (pctx->errcode) {
2577                                 pctx->num = 3;
2578                                 goto refcount_fail;
2579                         }
2580                 }
2581                 ea_refcount_store(ctx->ea_block_quota_blocks, blk,
2582                                   quota_blocks);
2583         }
2584
2585         if (quota_inodes) {
2586                 if (!ctx->ea_block_quota_inodes) {
2587                         pctx->errcode = ea_refcount_create(0,
2588                                                 &ctx->ea_block_quota_inodes);
2589                         if (pctx->errcode) {
2590                                 pctx->num = 4;
2591 refcount_fail:
2592                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2593                                 ctx->flags |= E2F_FLAG_ABORT;
2594                                 return 0;
2595                         }
2596                 }
2597
2598                 ea_refcount_store(ctx->ea_block_quota_inodes, blk,
2599                                   quota_inodes);
2600         }
2601         ea_block_quota->blocks = quota_blocks;
2602         ea_block_quota->inodes = quota_inodes;
2603
2604         inc_ea_inode_refs(ctx, pctx, first, end);
2605         ea_refcount_store(ctx->refcount, blk, header->h_refcount - 1);
2606         mark_block_used(ctx, blk);
2607         ext2fs_fast_mark_block_bitmap2(ctx->block_ea_map, blk);
2608         return 1;
2609
2610 clear_extattr:
2611         if (region)
2612                 region_free(region);
2613         ext2fs_file_acl_block_set(fs, inode, 0);
2614         e2fsck_write_inode(ctx, ino, inode, "check_ext_attr");
2615         return 0;
2616 }
2617
2618 /* Returns 1 if bad htree, 0 if OK */
2619 static int handle_htree(e2fsck_t ctx, struct problem_context *pctx,
2620                         ext2_ino_t ino, struct ext2_inode *inode,
2621                         char *block_buf)
2622 {
2623         struct ext2_dx_root_info        *root;
2624         ext2_filsys                     fs = ctx->fs;
2625         errcode_t                       retval;
2626         blk64_t                         blk;
2627
2628         if ((!LINUX_S_ISDIR(inode->i_mode) &&
2629              fix_problem(ctx, PR_1_HTREE_NODIR, pctx)) ||
2630             (!ext2fs_has_feature_dir_index(fs->super) &&
2631              fix_problem(ctx, PR_1_HTREE_SET, pctx)))
2632                 return 1;
2633
2634         pctx->errcode = ext2fs_bmap2(fs, ino, inode, 0, 0, 0, 0, &blk);
2635
2636         if ((pctx->errcode) ||
2637             (blk == 0) ||
2638             (blk < fs->super->s_first_data_block) ||
2639             (blk >= ext2fs_blocks_count(fs->super))) {
2640                 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2641                         return 1;
2642                 else
2643                         return 0;
2644         }
2645
2646         retval = io_channel_read_blk64(fs->io, blk, 1, block_buf);
2647         if (retval && fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2648                 return 1;
2649
2650         /* XXX should check that beginning matches a directory */
2651         root = (struct ext2_dx_root_info *) (block_buf + 24);
2652
2653         if ((root->reserved_zero || root->info_length < 8) &&
2654             fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2655                 return 1;
2656
2657         pctx->num = root->hash_version;
2658         if ((root->hash_version != EXT2_HASH_LEGACY) &&
2659             (root->hash_version != EXT2_HASH_HALF_MD4) &&
2660             (root->hash_version != EXT2_HASH_TEA) &&
2661             fix_problem(ctx, PR_1_HTREE_HASHV, pctx))
2662                 return 1;
2663
2664         if ((root->unused_flags & EXT2_HASH_FLAG_INCOMPAT) &&
2665             fix_problem(ctx, PR_1_HTREE_INCOMPAT, pctx))
2666                 return 1;
2667
2668         pctx->num = root->indirect_levels;
2669         if ((root->indirect_levels > ext2_dir_htree_level(fs)) &&
2670             fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2671                 return 1;
2672
2673         return 0;
2674 }
2675
2676 void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino,
2677                         struct ext2_inode *inode, int restart_flag,
2678                         const char *source)
2679 {
2680         inode->i_flags = 0;
2681         inode->i_links_count = 0;
2682         ext2fs_icount_store(ctx->inode_link_info, ino, 0);
2683         inode->i_dtime = ctx->now;
2684
2685         /*
2686          * If a special inode has such rotten block mappings that we
2687          * want to clear the whole inode, be sure to actually zap
2688          * the block maps because i_links_count isn't checked for
2689          * special inodes, and we'll end up right back here the next
2690          * time we run fsck.
2691          */
2692         if (ino < EXT2_FIRST_INODE(ctx->fs->super))
2693                 memset(inode->i_block, 0, sizeof(inode->i_block));
2694
2695         ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
2696         ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
2697         if (ctx->inode_reg_map)
2698                 ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
2699         if (ctx->inode_bad_map)
2700                 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
2701
2702         /*
2703          * If the inode was partially accounted for before processing
2704          * was aborted, we need to restart the pass 1 scan.
2705          */
2706         ctx->flags |= restart_flag;
2707
2708         if (ino == EXT2_BAD_INO)
2709                 memset(inode, 0, sizeof(struct ext2_inode));
2710
2711         e2fsck_write_inode(ctx, ino, inode, source);
2712 }
2713
2714 /*
2715  * Use the multiple-blocks reclamation code to fix alignment problems in
2716  * a bigalloc filesystem.  We want a logical cluster to map to *only* one
2717  * physical cluster, and we want the block offsets within that cluster to
2718  * line up.
2719  */
2720 static int has_unaligned_cluster_map(e2fsck_t ctx,
2721                                      blk64_t last_pblk, blk64_t last_lblk,
2722                                      blk64_t pblk, blk64_t lblk)
2723 {
2724         blk64_t cluster_mask;
2725
2726         if (!ctx->fs->cluster_ratio_bits)
2727                 return 0;
2728         cluster_mask = EXT2FS_CLUSTER_MASK(ctx->fs);
2729
2730         /*
2731          * If the block in the logical cluster doesn't align with the block in
2732          * the physical cluster...
2733          */
2734         if ((lblk & cluster_mask) != (pblk & cluster_mask))
2735                 return 1;
2736
2737         /*
2738          * If we cross a physical cluster boundary within a logical cluster...
2739          */
2740         if (last_pblk && (lblk & cluster_mask) != 0 &&
2741             EXT2FS_B2C(ctx->fs, lblk) == EXT2FS_B2C(ctx->fs, last_lblk) &&
2742             EXT2FS_B2C(ctx->fs, pblk) != EXT2FS_B2C(ctx->fs, last_pblk))
2743                 return 1;
2744
2745         return 0;
2746 }
2747
2748 static void scan_extent_node(e2fsck_t ctx, struct problem_context *pctx,
2749                              struct process_block_struct *pb,
2750                              blk64_t start_block, blk64_t end_block,
2751                              blk64_t eof_block,
2752                              ext2_extent_handle_t ehandle,
2753                              int try_repairs)
2754 {
2755         struct ext2fs_extent    extent;
2756         blk64_t                 blk, last_lblk;
2757         unsigned int            i, n;
2758         int                     is_dir, is_leaf;
2759         problem_t               problem;
2760         struct ext2_extent_info info;
2761         int                     failed_csum = 0;
2762
2763         if (pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID)
2764                 failed_csum = 1;
2765
2766         pctx->errcode = ext2fs_extent_get_info(ehandle, &info);
2767         if (pctx->errcode)
2768                 return;
2769         if (!(ctx->options & E2F_OPT_FIXES_ONLY) &&
2770             !pb->eti.force_rebuild) {
2771                 struct extent_tree_level *etl;
2772
2773                 etl = pb->eti.ext_info + info.curr_level;
2774                 etl->num_extents += info.num_entries;
2775                 etl->max_extents += info.max_entries;
2776                 /*
2777                  * Implementation wart: Splitting extent blocks when appending
2778                  * will leave the old block with one free entry.  Therefore
2779                  * unless the node is totally full, pretend that a non-root
2780                  * extent block can hold one fewer entry than it actually does,
2781                  * so that we don't repeatedly rebuild the extent tree.
2782                  */
2783                 if (info.curr_level && info.num_entries < info.max_entries)
2784                         etl->max_extents--;
2785         }
2786
2787         pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_FIRST_SIB,
2788                                           &extent);
2789         while ((pctx->errcode == 0 ||
2790                 pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID) &&
2791                info.num_entries-- > 0) {
2792                 is_leaf = extent.e_flags & EXT2_EXTENT_FLAGS_LEAF;
2793                 is_dir = LINUX_S_ISDIR(pctx->inode->i_mode);
2794                 last_lblk = extent.e_lblk + extent.e_len - 1;
2795
2796                 problem = 0;
2797                 pctx->blk = extent.e_pblk;
2798                 pctx->blk2 = extent.e_lblk;
2799                 pctx->num = extent.e_len;
2800                 pctx->blkcount = extent.e_lblk + extent.e_len;
2801
2802                 if (extent.e_pblk == 0 ||
2803                     extent.e_pblk < ctx->fs->super->s_first_data_block ||
2804                     extent.e_pblk >= ext2fs_blocks_count(ctx->fs->super))
2805                         problem = PR_1_EXTENT_BAD_START_BLK;
2806                 else if (extent.e_lblk < start_block)
2807                         problem = PR_1_OUT_OF_ORDER_EXTENTS;
2808                 else if ((end_block && last_lblk > end_block) &&
2809                          (!(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT &&
2810                                 last_lblk > eof_block)))
2811                         problem = PR_1_EXTENT_END_OUT_OF_BOUNDS;
2812                 else if (is_leaf && extent.e_len == 0)
2813                         problem = PR_1_EXTENT_LENGTH_ZERO;
2814                 else if (is_leaf &&
2815                          (extent.e_pblk + extent.e_len) >
2816                          ext2fs_blocks_count(ctx->fs->super))
2817                         problem = PR_1_EXTENT_ENDS_BEYOND;
2818                 else if (is_leaf && is_dir &&
2819                          ((extent.e_lblk + extent.e_len) >
2820                           (1U << (21 - ctx->fs->super->s_log_block_size))))
2821                         problem = PR_1_TOOBIG_DIR;
2822
2823                 if (is_leaf && problem == 0 && extent.e_len > 0) {
2824 #if 0
2825                         printf("extent_region(ino=%u, expect=%llu, "
2826                                "lblk=%llu, len=%u)\n",
2827                                pb->ino, pb->next_lblock,
2828                                extent.e_lblk, extent.e_len);
2829 #endif
2830                         if (extent.e_lblk < pb->next_lblock)
2831                                 problem = PR_1_EXTENT_COLLISION;
2832                         else if (extent.e_lblk + extent.e_len > pb->next_lblock)
2833                                 pb->next_lblock = extent.e_lblk + extent.e_len;
2834                 }
2835
2836                 /*
2837                  * Uninitialized blocks in a directory?  Clear the flag and
2838                  * we'll interpret the blocks later.
2839                  */
2840                 if (try_repairs && is_dir && problem == 0 &&
2841                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
2842                     fix_problem(ctx, PR_1_UNINIT_DBLOCK, pctx)) {
2843                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
2844                         pb->inode_modified = 1;
2845                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
2846                                                               &extent);
2847                         if (pctx->errcode)
2848                                 return;
2849                         failed_csum = 0;
2850                 }
2851
2852                 if (try_repairs && problem) {
2853 report_problem:
2854                         if (fix_problem(ctx, problem, pctx)) {
2855                                 if (ctx->invalid_bitmaps) {
2856                                         /*
2857                                          * If fsck knows the bitmaps are bad,
2858                                          * skip to the next extent and
2859                                          * try to clear this extent again
2860                                          * after fixing the bitmaps, by
2861                                          * restarting fsck.
2862                                          */
2863                                         pctx->errcode = ext2fs_extent_get(
2864                                                           ehandle,
2865                                                           EXT2_EXTENT_NEXT_SIB,
2866                                                           &extent);
2867                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
2868                                         if (pctx->errcode ==
2869                                                     EXT2_ET_NO_CURRENT_NODE) {
2870                                                 pctx->errcode = 0;
2871                                                 break;
2872                                         }
2873                                         continue;
2874                                 }
2875                                 e2fsck_read_bitmaps(ctx);
2876                                 pb->inode_modified = 1;
2877                                 pctx->errcode =
2878                                         ext2fs_extent_delete(ehandle, 0);
2879                                 if (pctx->errcode) {
2880                                         pctx->str = "ext2fs_extent_delete";
2881                                         return;
2882                                 }
2883                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
2884                                 if (pctx->errcode &&
2885                                     pctx->errcode != EXT2_ET_NO_CURRENT_NODE) {
2886                                         pctx->str = "ext2fs_extent_fix_parents";
2887                                         return;
2888                                 }
2889                                 pctx->errcode = ext2fs_extent_get(ehandle,
2890                                                                   EXT2_EXTENT_CURRENT,
2891                                                                   &extent);
2892                                 if (pctx->errcode == EXT2_ET_NO_CURRENT_NODE) {
2893                                         pctx->errcode = 0;
2894                                         break;
2895                                 }
2896                                 failed_csum = 0;
2897                                 continue;
2898                         }
2899                         goto next;
2900                 }
2901
2902                 if (!is_leaf) {
2903                         blk64_t lblk = extent.e_lblk;
2904                         int next_try_repairs = 1;
2905
2906                         blk = extent.e_pblk;
2907
2908                         /*
2909                          * If this lower extent block collides with critical
2910                          * metadata, don't try to repair the damage.  Pass 1b
2911                          * will reallocate the block; then we can try again.
2912                          */
2913                         if (pb->ino != EXT2_RESIZE_INO &&
2914                             extent.e_pblk < ctx->fs->super->s_blocks_count &&
2915                             ext2fs_test_block_bitmap2(ctx->block_metadata_map,
2916                                                       extent.e_pblk)) {
2917                                 next_try_repairs = 0;
2918                                 pctx->blk = blk;
2919                                 fix_problem(ctx,
2920                                             PR_1_CRITICAL_METADATA_COLLISION,
2921                                             pctx);
2922                                 if ((ctx->options & E2F_OPT_NO) == 0)
2923                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
2924                         }
2925                         pctx->errcode = ext2fs_extent_get(ehandle,
2926                                                   EXT2_EXTENT_DOWN, &extent);
2927                         if (pctx->errcode &&
2928                             pctx->errcode != EXT2_ET_EXTENT_CSUM_INVALID) {
2929                                 pctx->str = "EXT2_EXTENT_DOWN";
2930                                 problem = PR_1_EXTENT_HEADER_INVALID;
2931                                 if (!next_try_repairs)
2932                                         return;
2933                                 if (pctx->errcode == EXT2_ET_EXTENT_HEADER_BAD)
2934                                         goto report_problem;
2935                                 return;
2936                         }
2937                         /* The next extent should match this index's logical start */
2938                         if (extent.e_lblk != lblk) {
2939                                 struct ext2_extent_info e_info;
2940
2941                                 ext2fs_extent_get_info(ehandle, &e_info);
2942                                 pctx->blk = lblk;
2943                                 pctx->blk2 = extent.e_lblk;
2944                                 pctx->num = e_info.curr_level - 1;
2945                                 problem = PR_1_EXTENT_INDEX_START_INVALID;
2946                                 if (fix_problem(ctx, problem, pctx)) {
2947                                         pb->inode_modified = 1;
2948                                         pctx->errcode =
2949                                                 ext2fs_extent_fix_parents(ehandle);
2950                                         if (pctx->errcode) {
2951                                                 pctx->str = "ext2fs_extent_fix_parents";
2952                                                 return;
2953                                         }
2954                                 }
2955                         }
2956                         scan_extent_node(ctx, pctx, pb, extent.e_lblk,
2957                                          last_lblk, eof_block, ehandle,
2958                                          next_try_repairs);
2959                         if (pctx->errcode)
2960                                 return;
2961                         pctx->errcode = ext2fs_extent_get(ehandle,
2962                                                   EXT2_EXTENT_UP, &extent);
2963                         if (pctx->errcode) {
2964                                 pctx->str = "EXT2_EXTENT_UP";
2965                                 return;
2966                         }
2967                         mark_block_used(ctx, blk);
2968                         pb->num_blocks++;
2969                         goto next;
2970                 }
2971
2972                 if ((pb->previous_block != 0) &&
2973                     (pb->previous_block+1 != extent.e_pblk)) {
2974                         if (ctx->options & E2F_OPT_FRAGCHECK) {
2975                                 char type = '?';
2976
2977                                 if (pb->is_dir)
2978                                         type = 'd';
2979                                 else if (pb->is_reg)
2980                                         type = 'f';
2981
2982                                 printf(("%6lu(%c): expecting %6lu "
2983                                         "actual extent "
2984                                         "phys %6lu log %lu len %lu\n"),
2985                                        (unsigned long) pctx->ino, type,
2986                                        (unsigned long) pb->previous_block+1,
2987                                        (unsigned long) extent.e_pblk,
2988                                        (unsigned long) extent.e_lblk,
2989                                        (unsigned long) extent.e_len);
2990                         }
2991                         pb->fragmented = 1;
2992                 }
2993                 /*
2994                  * If we notice a gap in the logical block mappings of an
2995                  * extent-mapped directory, offer to close the hole by
2996                  * moving the logical block down, otherwise we'll go mad in
2997                  * pass 3 allocating empty directory blocks to fill the hole.
2998                  */
2999                 if (try_repairs && is_dir &&
3000                     pb->last_block + 1 < extent.e_lblk) {
3001                         blk64_t new_lblk;
3002
3003                         new_lblk = pb->last_block + 1;
3004                         if (EXT2FS_CLUSTER_RATIO(ctx->fs) > 1)
3005                                 new_lblk = ((new_lblk +
3006                                              EXT2FS_CLUSTER_RATIO(ctx->fs) - 1) &
3007                                             ~EXT2FS_CLUSTER_MASK(ctx->fs)) |
3008                                            (extent.e_pblk &
3009                                             EXT2FS_CLUSTER_MASK(ctx->fs));
3010                         pctx->blk = extent.e_lblk;
3011                         pctx->blk2 = new_lblk;
3012                         if (fix_problem(ctx, PR_1_COLLAPSE_DBLOCK, pctx)) {
3013                                 extent.e_lblk = new_lblk;
3014                                 pb->inode_modified = 1;
3015                                 pctx->errcode = ext2fs_extent_replace(ehandle,
3016                                                                 0, &extent);
3017                                 if (pctx->errcode) {
3018                                         pctx->errcode = 0;
3019                                         goto alloc_later;
3020                                 }
3021                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3022                                 if (pctx->errcode)
3023                                         goto failed_add_dir_block;
3024                                 pctx->errcode = ext2fs_extent_goto(ehandle,
3025                                                                 extent.e_lblk);
3026                                 if (pctx->errcode)
3027                                         goto failed_add_dir_block;
3028                                 last_lblk = extent.e_lblk + extent.e_len - 1;
3029                                 failed_csum = 0;
3030                         }
3031                 }
3032 alloc_later:
3033                 if (is_dir) {
3034                         while (++pb->last_db_block <
3035                                (e2_blkcnt_t) extent.e_lblk) {
3036                                 pctx->errcode = ext2fs_add_dir_block2(
3037                                                         ctx->fs->dblist,
3038                                                         pb->ino, 0,
3039                                                         pb->last_db_block);
3040                                 if (pctx->errcode) {
3041                                         pctx->blk = 0;
3042                                         pctx->num = pb->last_db_block;
3043                                         goto failed_add_dir_block;
3044                                 }
3045                         }
3046
3047                         for (i = 0; i < extent.e_len; i++) {
3048                                 pctx->errcode = ext2fs_add_dir_block2(
3049                                                         ctx->fs->dblist,
3050                                                         pctx->ino,
3051                                                         extent.e_pblk + i,
3052                                                         extent.e_lblk + i);
3053                                 if (pctx->errcode) {
3054                                         pctx->blk = extent.e_pblk + i;
3055                                         pctx->num = extent.e_lblk + i;
3056                                 failed_add_dir_block:
3057                                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3058                                         /* Should never get here */
3059                                         ctx->flags |= E2F_FLAG_ABORT;
3060                                         return;
3061                                 }
3062                         }
3063                         if (extent.e_len > 0)
3064                                 pb->last_db_block = extent.e_lblk + extent.e_len - 1;
3065                 }
3066                 if (has_unaligned_cluster_map(ctx, pb->previous_block,
3067                                               pb->last_block,
3068                                               extent.e_pblk,
3069                                               extent.e_lblk)) {
3070                         for (i = 0; i < extent.e_len; i++) {
3071                                 pctx->blk = extent.e_lblk + i;
3072                                 pctx->blk2 = extent.e_pblk + i;
3073                                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3074                                 mark_block_used(ctx, extent.e_pblk + i);
3075                                 mark_block_used(ctx, extent.e_pblk + i);
3076                         }
3077                 }
3078
3079                 /*
3080                  * Check whether first cluster got marked in previous iteration.
3081                  */
3082                 if (ctx->fs->cluster_ratio_bits &&
3083                     pb->previous_block &&
3084                     (EXT2FS_B2C(ctx->fs, extent.e_pblk) ==
3085                      EXT2FS_B2C(ctx->fs, pb->previous_block)))
3086                         /* Set blk to the beginning of next cluster. */
3087                         blk = EXT2FS_C2B(
3088                                 ctx->fs,
3089                                 EXT2FS_B2C(ctx->fs, extent.e_pblk) + 1);
3090                 else
3091                         /* Set blk to the beginning of current cluster. */
3092                         blk = EXT2FS_C2B(ctx->fs,
3093                                          EXT2FS_B2C(ctx->fs, extent.e_pblk));
3094
3095                 if (blk < extent.e_pblk + extent.e_len) {
3096                         mark_blocks_used(ctx, blk,
3097                                          extent.e_pblk + extent.e_len - blk);
3098                         n = DIV_ROUND_UP(extent.e_pblk + extent.e_len - blk,
3099                                          EXT2FS_CLUSTER_RATIO(ctx->fs));
3100                         pb->num_blocks += n;
3101                 }
3102                 pb->last_block = extent.e_lblk + extent.e_len - 1;
3103                 pb->previous_block = extent.e_pblk + extent.e_len - 1;
3104                 start_block = pb->last_block = last_lblk;
3105                 if (is_leaf && !is_dir &&
3106                     !(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT))
3107                         pb->last_init_lblock = last_lblk;
3108         next:
3109                 pctx->errcode = ext2fs_extent_get(ehandle,
3110                                                   EXT2_EXTENT_NEXT_SIB,
3111                                                   &extent);
3112         }
3113
3114         /* Failed csum but passes checks?  Ask to fix checksum. */
3115         if (failed_csum &&
3116             fix_problem(ctx, PR_1_EXTENT_ONLY_CSUM_INVALID, pctx)) {
3117                 pb->inode_modified = 1;
3118                 pctx->errcode = ext2fs_extent_replace(ehandle, 0, &extent);
3119                 if (pctx->errcode)
3120                         return;
3121         }
3122
3123         if (pctx->errcode == EXT2_ET_EXTENT_NO_NEXT)
3124                 pctx->errcode = 0;
3125 }
3126
3127 static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx,
3128                                  struct process_block_struct *pb)
3129 {
3130         struct ext2_extent_info info;
3131         struct ext2_inode       *inode = pctx->inode;
3132         ext2_extent_handle_t    ehandle;
3133         ext2_filsys             fs = ctx->fs;
3134         ext2_ino_t              ino = pctx->ino;
3135         errcode_t               retval;
3136         blk64_t                 eof_lblk;
3137         struct ext3_extent_header       *eh;
3138
3139         /* Check for a proper extent header... */
3140         eh = (struct ext3_extent_header *) &inode->i_block[0];
3141         retval = ext2fs_extent_header_verify(eh, sizeof(inode->i_block));
3142         if (retval) {
3143                 if (fix_problem(ctx, PR_1_MISSING_EXTENT_HEADER, pctx))
3144                         e2fsck_clear_inode(ctx, ino, inode, 0,
3145                                            "check_blocks_extents");
3146                 pctx->errcode = 0;
3147                 return;
3148         }
3149
3150         /* ...since this function doesn't fail if i_block is zeroed. */
3151         pctx->errcode = ext2fs_extent_open2(fs, ino, inode, &ehandle);
3152         if (pctx->errcode) {
3153                 if (fix_problem(ctx, PR_1_READ_EXTENT, pctx))
3154                         e2fsck_clear_inode(ctx, ino, inode, 0,
3155                                            "check_blocks_extents");
3156                 pctx->errcode = 0;
3157                 return;
3158         }
3159
3160         retval = ext2fs_extent_get_info(ehandle, &info);
3161         if (retval == 0) {
3162                 int max_depth = info.max_depth;
3163
3164                 if (max_depth >= MAX_EXTENT_DEPTH_COUNT)
3165                         max_depth = MAX_EXTENT_DEPTH_COUNT-1;
3166                 ctx->extent_depth_count[max_depth]++;
3167         }
3168
3169         /* Check maximum extent depth */
3170         pctx->blk = info.max_depth;
3171         pctx->blk2 = ext2fs_max_extent_depth(ehandle);
3172         if (pctx->blk2 < pctx->blk &&
3173             fix_problem(ctx, PR_1_EXTENT_BAD_MAX_DEPTH, pctx))
3174                 pb->eti.force_rebuild = 1;
3175
3176         /* Can we collect extent tree level stats? */
3177         pctx->blk = MAX_EXTENT_DEPTH_COUNT;
3178         if (pctx->blk2 > pctx->blk)
3179                 fix_problem(ctx, PR_1E_MAX_EXTENT_TREE_DEPTH, pctx);
3180         memset(pb->eti.ext_info, 0, sizeof(pb->eti.ext_info));
3181         pb->eti.ino = pb->ino;
3182
3183         pb->next_lblock = 0;
3184
3185         eof_lblk = ((EXT2_I_SIZE(inode) + fs->blocksize - 1) >>
3186                 EXT2_BLOCK_SIZE_BITS(fs->super)) - 1;
3187         scan_extent_node(ctx, pctx, pb, 0, 0, eof_lblk, ehandle, 1);
3188         if (pctx->errcode &&
3189             fix_problem(ctx, PR_1_EXTENT_ITERATE_FAILURE, pctx)) {
3190                 pb->num_blocks = 0;
3191                 inode->i_blocks = 0;
3192                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3193                                    "check_blocks_extents");
3194                 pctx->errcode = 0;
3195         }
3196         ext2fs_extent_free(ehandle);
3197
3198         /* Rebuild unless it's a dir and we're rehashing it */
3199         if (LINUX_S_ISDIR(inode->i_mode) &&
3200             e2fsck_dir_will_be_rehashed(ctx, ino))
3201                 return;
3202
3203         if (ctx->options & E2F_OPT_CONVERT_BMAP)
3204                 e2fsck_rebuild_extents_later(ctx, ino);
3205         else
3206                 e2fsck_should_rebuild_extents(ctx, pctx, &pb->eti, &info);
3207 }
3208
3209 /*
3210  * In fact we don't need to check blocks for an inode with inline data
3211  * because this inode doesn't have any blocks.  In this function all
3212  * we need to do is add this inode into dblist when it is a directory.
3213  */
3214 static void check_blocks_inline_data(e2fsck_t ctx, struct problem_context *pctx,
3215                                      struct process_block_struct *pb)
3216 {
3217         int     flags;
3218         size_t  inline_data_size = 0;
3219
3220         if (!pb->is_dir) {
3221                 pctx->errcode = 0;
3222                 return;
3223         }
3224
3225         /* Process the dirents in i_block[] as the "first" block. */
3226         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 0);
3227         if (pctx->errcode)
3228                 goto err;
3229
3230         /* Process the dirents in the EA as a "second" block. */
3231         flags = ctx->fs->flags;
3232         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3233         pctx->errcode = ext2fs_inline_data_size(ctx->fs, pb->ino,
3234                                                 &inline_data_size);
3235         ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3236                          (ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3237         if (pctx->errcode) {
3238                 pctx->errcode = 0;
3239                 return;
3240         }
3241
3242         if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE)
3243                 return;
3244
3245         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 1);
3246         if (pctx->errcode)
3247                 goto err;
3248
3249         return;
3250 err:
3251         pctx->blk = 0;
3252         pctx->num = 0;
3253         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3254         ctx->flags |= E2F_FLAG_ABORT;
3255 }
3256
3257 /*
3258  * This subroutine is called on each inode to account for all of the
3259  * blocks used by that inode.
3260  */
3261 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
3262                          char *block_buf, const struct ea_quota *ea_ibody_quota)
3263 {
3264         ext2_filsys fs = ctx->fs;
3265         struct process_block_struct pb;
3266         ext2_ino_t      ino = pctx->ino;
3267         struct ext2_inode *inode = pctx->inode;
3268         unsigned        bad_size = 0;
3269         int             dirty_inode = 0;
3270         int             extent_fs;
3271         int             inlinedata_fs;
3272         __u64           size;
3273         struct ea_quota ea_block_quota;
3274
3275         pb.ino = ino;
3276         pb.num_blocks = EXT2FS_B2C(ctx->fs,
3277                                    ea_ibody_quota ? ea_ibody_quota->blocks : 0);
3278         pb.last_block = ~0;
3279         pb.last_init_lblock = -1;
3280         pb.last_db_block = -1;
3281         pb.num_illegal_blocks = 0;
3282         pb.suppress = 0; pb.clear = 0;
3283         pb.fragmented = 0;
3284         pb.compressed = 0;
3285         pb.previous_block = 0;
3286         pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
3287         pb.is_reg = LINUX_S_ISREG(inode->i_mode);
3288         pb.max_blocks = 1U << (31 - fs->super->s_log_block_size);
3289         pb.inode = inode;
3290         pb.pctx = pctx;
3291         pb.ctx = ctx;
3292         pb.inode_modified = 0;
3293         pb.eti.force_rebuild = 0;
3294         pctx->ino = ino;
3295         pctx->errcode = 0;
3296
3297         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
3298         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
3299
3300         if (check_ext_attr(ctx, pctx, block_buf, &ea_block_quota)) {
3301                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3302                         goto out;
3303                 pb.num_blocks += EXT2FS_B2C(ctx->fs, ea_block_quota.blocks);
3304         }
3305
3306         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL))
3307                 check_blocks_inline_data(ctx, pctx, &pb);
3308         else if (ext2fs_inode_has_valid_blocks2(fs, inode)) {
3309                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL))
3310                         check_blocks_extents(ctx, pctx, &pb);
3311                 else {
3312                         int flags;
3313                         /*
3314                          * If we've modified the inode, write it out before
3315                          * iterate() tries to use it.
3316                          */
3317                         if (dirty_inode) {
3318                                 e2fsck_write_inode(ctx, ino, inode,
3319                                                    "check_blocks");
3320                                 dirty_inode = 0;
3321                         }
3322                         flags = fs->flags;
3323                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3324                         pctx->errcode = ext2fs_block_iterate3(fs, ino,
3325                                                 pb.is_dir ? BLOCK_FLAG_HOLE : 0,
3326                                                 block_buf, process_block, &pb);
3327                         /*
3328                          * We do not have uninitialized extents in non extent
3329                          * files.
3330                          */
3331                         pb.last_init_lblock = pb.last_block;
3332                         /*
3333                          * If iterate() changed a block mapping, we have to
3334                          * re-read the inode.  If we decide to clear the
3335                          * inode after clearing some stuff, we'll re-write the
3336                          * bad mappings into the inode!
3337                          */
3338                         if (pb.inode_modified)
3339                                 e2fsck_read_inode(ctx, ino, inode,
3340                                                   "check_blocks");
3341                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3342                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3343
3344                         if (ctx->options & E2F_OPT_CONVERT_BMAP) {
3345 #ifdef DEBUG
3346                                 printf("bmap rebuild ino=%d\n", ino);
3347 #endif
3348                                 if (!LINUX_S_ISDIR(inode->i_mode) ||
3349                                     !e2fsck_dir_will_be_rehashed(ctx, ino))
3350                                         e2fsck_rebuild_extents_later(ctx, ino);
3351                         }
3352                 }
3353         }
3354         end_problem_latch(ctx, PR_LATCH_BLOCK);
3355         end_problem_latch(ctx, PR_LATCH_TOOBIG);
3356         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3357                 goto out;
3358         if (pctx->errcode)
3359                 fix_problem(ctx, PR_1_BLOCK_ITERATE, pctx);
3360
3361         if (pb.fragmented && pb.num_blocks < fs->super->s_blocks_per_group) {
3362                 if (LINUX_S_ISDIR(inode->i_mode))
3363                         ctx->fs_fragmented_dir++;
3364                 else
3365                         ctx->fs_fragmented++;
3366         }
3367
3368         if (pb.clear) {
3369                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3370                                    "check_blocks");
3371                 return;
3372         }
3373
3374         if (inode->i_flags & EXT2_INDEX_FL) {
3375                 if (handle_htree(ctx, pctx, ino, inode, block_buf)) {
3376                         inode->i_flags &= ~EXT2_INDEX_FL;
3377                         dirty_inode++;
3378                 } else {
3379                         e2fsck_add_dx_dir(ctx, ino, pb.last_block+1);
3380                 }
3381         }
3382
3383         if (!pb.num_blocks && pb.is_dir &&
3384             !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
3385                 if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) {
3386                         e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks");
3387                         ctx->fs_directory_count--;
3388                         return;
3389                 }
3390         }
3391
3392         if (ino != quota_type2inum(PRJQUOTA, fs->super) &&
3393             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super)) &&
3394             !(inode->i_flags & EXT4_EA_INODE_FL)) {
3395                 quota_data_add(ctx->qctx, (struct ext2_inode_large *) inode,
3396                                ino,
3397                                pb.num_blocks * EXT2_CLUSTER_SIZE(fs->super));
3398                 quota_data_inodes(ctx->qctx, (struct ext2_inode_large *) inode,
3399                                   ino, (ea_ibody_quota ?
3400                                         ea_ibody_quota->inodes : 0) +
3401                                                 ea_block_quota.inodes + 1);
3402         }
3403
3404         if (!ext2fs_has_feature_huge_file(fs->super) ||
3405             !(inode->i_flags & EXT4_HUGE_FILE_FL))
3406                 pb.num_blocks *= (fs->blocksize / 512);
3407         pb.num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
3408 #if 0
3409         printf("inode %u, i_size = %u, last_block = %llu, i_blocks=%llu, num_blocks = %llu\n",
3410                ino, inode->i_size, pb.last_block, ext2fs_inode_i_blocks(fs, inode),
3411                pb.num_blocks);
3412 #endif
3413         if (pb.is_dir) {
3414                 unsigned nblock = inode->i_size >> EXT2_BLOCK_SIZE_BITS(fs->super);
3415                 if (inode->i_flags & EXT4_INLINE_DATA_FL) {
3416                         int flags;
3417                         size_t sz = 0;
3418                         errcode_t err;
3419
3420                         flags = ctx->fs->flags;
3421                         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3422                         err = ext2fs_inline_data_size(ctx->fs, pctx->ino,
3423                                                       &sz);
3424                         ctx->fs->flags = (flags &
3425                                           EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3426                                          (ctx->fs->flags &
3427                                           ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3428                         if (err || sz != inode->i_size) {
3429                                 bad_size = 7;
3430                                 pctx->num = sz;
3431                         }
3432                 } else if (inode->i_size & (fs->blocksize - 1))
3433                         bad_size = 5;
3434                 else if (nblock > (pb.last_block + 1))
3435                         bad_size = 1;
3436                 else if (nblock < (pb.last_block + 1)) {
3437                         if (((pb.last_block + 1) - nblock) >
3438                             fs->super->s_prealloc_dir_blocks)
3439                                 bad_size = 2;
3440                 }
3441         } else {
3442                 e2_blkcnt_t blkpg = ctx->blocks_per_page;
3443
3444                 size = EXT2_I_SIZE(inode);
3445                 if ((pb.last_init_lblock >= 0) &&
3446                     /* allow allocated blocks to end of PAGE_SIZE */
3447                     (size < (__u64)pb.last_init_lblock * fs->blocksize) &&
3448                     (pb.last_init_lblock / blkpg * blkpg != pb.last_init_lblock ||
3449                      size < (__u64)(pb.last_init_lblock & ~(blkpg-1)) *
3450                      fs->blocksize))
3451                         bad_size = 3;
3452                 else if (!(extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3453                          size > ext2_max_sizes[fs->super->s_log_block_size])
3454                         /* too big for a direct/indirect-mapped file */
3455                         bad_size = 4;
3456                 else if ((extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3457                          size >
3458                          ((1ULL << (32 + EXT2_BLOCK_SIZE_BITS(fs->super))) - 1))
3459                         /* too big for an extent-based file - 32bit ee_block */
3460                         bad_size = 6;
3461         }
3462         /* i_size for symlinks is checked elsewhere */
3463         if (bad_size && !LINUX_S_ISLNK(inode->i_mode)) {
3464                 /* Did inline_data set pctx->num earlier? */
3465                 if (bad_size != 7)
3466                         pctx->num = (pb.last_block + 1) * fs->blocksize;
3467                 pctx->group = bad_size;
3468                 if (fix_problem(ctx, PR_1_BAD_I_SIZE, pctx)) {
3469                         if (LINUX_S_ISDIR(inode->i_mode))
3470                                 pctx->num &= 0xFFFFFFFFULL;
3471                         ext2fs_inode_size_set(fs, inode, pctx->num);
3472                         if (EXT2_I_SIZE(inode) == 0 &&
3473                             (inode->i_flags & EXT4_INLINE_DATA_FL)) {
3474                                 memset(inode->i_block, 0,
3475                                        sizeof(inode->i_block));
3476                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
3477                         }
3478                         dirty_inode++;
3479                 }
3480                 pctx->num = 0;
3481         }
3482         if (LINUX_S_ISREG(inode->i_mode) &&
3483             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
3484                 ctx->large_files++;
3485         if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
3486             ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) ||
3487              (ext2fs_has_feature_huge_file(fs->super) &&
3488               (inode->i_flags & EXT4_HUGE_FILE_FL) &&
3489               (inode->osd2.linux2.l_i_blocks_hi != 0)))) {
3490                 pctx->num = pb.num_blocks;
3491                 if (fix_problem(ctx, PR_1_BAD_I_BLOCKS, pctx)) {
3492                         inode->i_blocks = pb.num_blocks;
3493                         inode->osd2.linux2.l_i_blocks_hi = pb.num_blocks >> 32;
3494                         dirty_inode++;
3495                 }
3496                 pctx->num = 0;
3497         }
3498
3499         /*
3500          * The kernel gets mad if we ask it to allocate bigalloc clusters to
3501          * a block mapped file, so rebuild it as an extent file.  We can skip
3502          * symlinks because they're never rewritten.
3503          */
3504         if (ext2fs_has_feature_bigalloc(fs->super) &&
3505             (LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode)) &&
3506             ext2fs_inode_data_blocks2(fs, inode) > 0 &&
3507             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INO(fs->super)) &&
3508             !(inode->i_flags & (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)) &&
3509             fix_problem(ctx, PR_1_NO_BIGALLOC_BLOCKMAP_FILES, pctx)) {
3510                 pctx->errcode = e2fsck_rebuild_extents_later(ctx, ino);
3511                 if (pctx->errcode)
3512                         goto out;
3513         }
3514
3515         if (ctx->dirs_to_hash && pb.is_dir &&
3516             !(ctx->lost_and_found && ctx->lost_and_found == ino) &&
3517             !(inode->i_flags & EXT2_INDEX_FL) &&
3518             ((inode->i_size / fs->blocksize) >= 3))
3519                 e2fsck_rehash_dir_later(ctx, ino);
3520
3521 out:
3522         if (dirty_inode)
3523                 e2fsck_write_inode(ctx, ino, inode, "check_blocks");
3524 }
3525
3526 #if 0
3527 /*
3528  * Helper function called by process block when an illegal block is
3529  * found.  It returns a description about why the block is illegal
3530  */
3531 static char *describe_illegal_block(ext2_filsys fs, blk64_t block)
3532 {
3533         blk64_t super;
3534         int     i;
3535         static char     problem[80];
3536
3537         super = fs->super->s_first_data_block;
3538         strcpy(problem, "PROGRAMMING ERROR: Unknown reason for illegal block");
3539         if (block < super) {
3540                 sprintf(problem, "< FIRSTBLOCK (%u)", super);
3541                 return(problem);
3542         } else if (block >= ext2fs_blocks_count(fs->super)) {
3543                 sprintf(problem, "> BLOCKS (%u)", ext2fs_blocks_count(fs->super));
3544                 return(problem);
3545         }
3546         for (i = 0; i < fs->group_desc_count; i++) {
3547                 if (block == super) {
3548                         sprintf(problem, "is the superblock in group %d", i);
3549                         break;
3550                 }
3551                 if (block > super &&
3552                     block <= (super + fs->desc_blocks)) {
3553                         sprintf(problem, "is in the group descriptors "
3554                                 "of group %d", i);
3555                         break;
3556                 }
3557                 if (block == ext2fs_block_bitmap_loc(fs, i)) {
3558                         sprintf(problem, "is the block bitmap of group %d", i);
3559                         break;
3560                 }
3561                 if (block == ext2fs_inode_bitmap_loc(fs, i)) {
3562                         sprintf(problem, "is the inode bitmap of group %d", i);
3563                         break;
3564                 }
3565                 if (block >= ext2fs_inode_table_loc(fs, i) &&
3566                     (block < ext2fs_inode_table_loc(fs, i)
3567                      + fs->inode_blocks_per_group)) {
3568                         sprintf(problem, "is in the inode table of group %d",
3569                                 i);
3570                         break;
3571                 }
3572                 super += fs->super->s_blocks_per_group;
3573         }
3574         return(problem);
3575 }
3576 #endif
3577
3578 /*
3579  * This is a helper function for check_blocks().
3580  */
3581 static int process_block(ext2_filsys fs,
3582                   blk64_t       *block_nr,
3583                   e2_blkcnt_t blockcnt,
3584                   blk64_t ref_block EXT2FS_ATTR((unused)),
3585                   int ref_offset EXT2FS_ATTR((unused)),
3586                   void *priv_data)
3587 {
3588         struct process_block_struct *p;
3589         struct problem_context *pctx;
3590         blk64_t blk = *block_nr;
3591         int     ret_code = 0;
3592         problem_t       problem = 0;
3593         e2fsck_t        ctx;
3594
3595         p = (struct process_block_struct *) priv_data;
3596         pctx = p->pctx;
3597         ctx = p->ctx;
3598
3599         /*
3600          * For a directory, add logical block zero for processing even if it's
3601          * not mapped or we'll be perennially stuck with broken "." and ".."
3602          * entries.
3603          */
3604         if (p->is_dir && blockcnt == 0 && blk == 0) {
3605                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino, 0, 0);
3606                 if (pctx->errcode) {
3607                         pctx->blk = blk;
3608                         pctx->num = blockcnt;
3609                         goto failed_add_dir_block;
3610                 }
3611                 p->last_db_block++;
3612         }
3613
3614         if (blk == 0)
3615                 return 0;
3616
3617 #if 0
3618         printf("Process_block, inode %lu, block %u, #%d\n", p->ino, blk,
3619                blockcnt);
3620 #endif
3621
3622         /*
3623          * Simplistic fragmentation check.  We merely require that the
3624          * file be contiguous.  (Which can never be true for really
3625          * big files that are greater than a block group.)
3626          */
3627         if (p->previous_block && p->ino != EXT2_RESIZE_INO) {
3628                 if (p->previous_block+1 != blk) {
3629                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3630                                 char type = '?';
3631
3632                                 if (p->is_dir)
3633                                         type = 'd';
3634                                 else if (p->is_reg)
3635                                         type = 'f';
3636
3637                                 printf(_("%6lu(%c): expecting %6lu "
3638                                          "got phys %6lu (blkcnt %lld)\n"),
3639                                        (unsigned long) pctx->ino, type,
3640                                        (unsigned long) p->previous_block+1,
3641                                        (unsigned long) blk,
3642                                        blockcnt);
3643                         }
3644                         p->fragmented = 1;
3645                 }
3646         }
3647
3648         if (p->is_dir && blockcnt > (1 << (21 - fs->super->s_log_block_size)))
3649                 problem = PR_1_TOOBIG_DIR;
3650         if (p->is_reg && p->num_blocks+1 >= p->max_blocks)
3651                 problem = PR_1_TOOBIG_REG;
3652         if (!p->is_dir && !p->is_reg && blockcnt > 0)
3653                 problem = PR_1_TOOBIG_SYMLINK;
3654
3655         if (blk < fs->super->s_first_data_block ||
3656             blk >= ext2fs_blocks_count(fs->super))
3657                 problem = PR_1_ILLEGAL_BLOCK_NUM;
3658
3659         /*
3660          * If this IND/DIND/TIND block is squatting atop some critical metadata
3661          * (group descriptors, superblock, bitmap, inode table), any write to
3662          * "fix" mapping problems will destroy the metadata.  We'll let pass 1b
3663          * fix that and restart fsck.
3664          */
3665         if (blockcnt < 0 &&
3666             p->ino != EXT2_RESIZE_INO &&
3667             blk < ctx->fs->super->s_blocks_count &&
3668             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk)) {
3669                 pctx->blk = blk;
3670                 fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx);
3671                 if ((ctx->options & E2F_OPT_NO) == 0)
3672                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3673         }
3674
3675         if (problem) {
3676                 p->num_illegal_blocks++;
3677                 /*
3678                  * A bit of subterfuge here -- we're trying to fix a block
3679                  * mapping, but the IND/DIND/TIND block could have collided
3680                  * with some critical metadata.  So, fix the in-core mapping so
3681                  * iterate won't go insane, but return 0 instead of
3682                  * BLOCK_CHANGED so that it won't write the remapping out to
3683                  * our multiply linked block.
3684                  *
3685                  * Even if we previously determined that an *IND block
3686                  * conflicts with critical metadata, we must still try to
3687                  * iterate the *IND block as if it is an *IND block to find and
3688                  * mark the blocks it points to.  Better to be overly cautious
3689                  * with the used_blocks map so that we don't move the *IND
3690                  * block to a block that's really in use!
3691                  */
3692                 if (p->ino != EXT2_RESIZE_INO &&
3693                     ref_block != 0 &&
3694                     ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3695                                               ref_block)) {
3696                         *block_nr = 0;
3697                         return 0;
3698                 }
3699                 if (!p->suppress && (p->num_illegal_blocks % 12) == 0) {
3700                         if (fix_problem(ctx, PR_1_TOO_MANY_BAD_BLOCKS, pctx)) {
3701                                 p->clear = 1;
3702                                 return BLOCK_ABORT;
3703                         }
3704                         if (fix_problem(ctx, PR_1_SUPPRESS_MESSAGES, pctx)) {
3705                                 p->suppress = 1;
3706                                 set_latch_flags(PR_LATCH_BLOCK,
3707                                                 PRL_SUPPRESS, 0);
3708                         }
3709                 }
3710                 pctx->blk = blk;
3711                 pctx->blkcount = blockcnt;
3712                 if (fix_problem(ctx, problem, pctx)) {
3713                         blk = *block_nr = 0;
3714                         ret_code = BLOCK_CHANGED;
3715                         p->inode_modified = 1;
3716                         /*
3717                          * If the directory block is too big and is beyond the
3718                          * end of the FS, don't bother trying to add it for
3719                          * processing -- the kernel would never have created a
3720                          * directory this large, and we risk an ENOMEM abort.
3721                          * In any case, the toobig handler for extent-based
3722                          * directories also doesn't feed toobig blocks to
3723                          * pass 2.
3724                          */
3725                         if (problem == PR_1_TOOBIG_DIR)
3726                                 return ret_code;
3727                         goto mark_dir;
3728                 } else
3729                         return 0;
3730         }
3731
3732         if (p->ino == EXT2_RESIZE_INO) {
3733                 /*
3734                  * The resize inode has already be sanity checked
3735                  * during pass #0 (the superblock checks).  All we
3736                  * have to do is mark the double indirect block as
3737                  * being in use; all of the other blocks are handled
3738                  * by mark_table_blocks()).
3739                  */
3740                 if (blockcnt == BLOCK_COUNT_DIND)
3741                         mark_block_used(ctx, blk);
3742                 p->num_blocks++;
3743         } else if (!(ctx->fs->cluster_ratio_bits &&
3744                      p->previous_block &&
3745                      (EXT2FS_B2C(ctx->fs, blk) ==
3746                       EXT2FS_B2C(ctx->fs, p->previous_block)) &&
3747                      (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
3748                      ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
3749                 mark_block_used(ctx, blk);
3750                 p->num_blocks++;
3751         } else if (has_unaligned_cluster_map(ctx, p->previous_block,
3752                                              p->last_block, blk, blockcnt)) {
3753                 pctx->blk = blockcnt;
3754                 pctx->blk2 = blk;
3755                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3756                 mark_block_used(ctx, blk);
3757                 mark_block_used(ctx, blk);
3758         }
3759         if (blockcnt >= 0)
3760                 p->last_block = blockcnt;
3761         p->previous_block = blk;
3762 mark_dir:
3763         if (p->is_dir && (blockcnt >= 0)) {
3764                 while (++p->last_db_block < blockcnt) {
3765                         pctx->errcode = ext2fs_add_dir_block2(fs->dblist,
3766                                                               p->ino, 0,
3767                                                               p->last_db_block);
3768                         if (pctx->errcode) {
3769                                 pctx->blk = 0;
3770                                 pctx->num = p->last_db_block;
3771                                 goto failed_add_dir_block;
3772                         }
3773                 }
3774                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino,
3775                                                       blk, blockcnt);
3776                 if (pctx->errcode) {
3777                         pctx->blk = blk;
3778                         pctx->num = blockcnt;
3779                 failed_add_dir_block:
3780                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3781                         /* Should never get here */
3782                         ctx->flags |= E2F_FLAG_ABORT;
3783                         return BLOCK_ABORT;
3784                 }
3785         }
3786         return ret_code;
3787 }
3788
3789 static int process_bad_block(ext2_filsys fs,
3790                       blk64_t *block_nr,
3791                       e2_blkcnt_t blockcnt,
3792                       blk64_t ref_block EXT2FS_ATTR((unused)),
3793                       int ref_offset EXT2FS_ATTR((unused)),
3794                       void *priv_data)
3795 {
3796         struct process_block_struct *p;
3797         blk64_t         blk = *block_nr;
3798         blk64_t         first_block;
3799         dgrp_t          i;
3800         struct problem_context *pctx;
3801         e2fsck_t        ctx;
3802
3803         if (!blk)
3804                 return 0;
3805
3806         p = (struct process_block_struct *) priv_data;
3807         ctx = p->ctx;
3808         pctx = p->pctx;
3809
3810         pctx->ino = EXT2_BAD_INO;
3811         pctx->blk = blk;
3812         pctx->blkcount = blockcnt;
3813
3814         if ((blk < fs->super->s_first_data_block) ||
3815             (blk >= ext2fs_blocks_count(fs->super))) {
3816                 if (fix_problem(ctx, PR_1_BB_ILLEGAL_BLOCK_NUM, pctx)) {
3817                         *block_nr = 0;
3818                         return BLOCK_CHANGED;
3819                 } else
3820                         return 0;
3821         }
3822
3823         if (blockcnt < 0) {
3824                 if (ext2fs_test_block_bitmap2(p->fs_meta_blocks, blk)) {
3825                         p->bbcheck = 1;
3826                         if (fix_problem(ctx, PR_1_BB_FS_BLOCK, pctx)) {
3827                                 *block_nr = 0;
3828                                 return BLOCK_CHANGED;
3829                         }
3830                 } else if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3831                                                     blk)) {
3832                         p->bbcheck = 1;
3833                         if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK,
3834                                         pctx)) {
3835                                 *block_nr = 0;
3836                                 return BLOCK_CHANGED;
3837                         }
3838                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3839                                 return BLOCK_ABORT;
3840                 } else
3841                         mark_block_used(ctx, blk);
3842                 return 0;
3843         }
3844 #if 0
3845         printf ("DEBUG: Marking %u as bad.\n", blk);
3846 #endif
3847         ctx->fs_badblocks_count++;
3848         /*
3849          * If the block is not used, then mark it as used and return.
3850          * If it is already marked as found, this must mean that
3851          * there's an overlap between the filesystem table blocks
3852          * (bitmaps and inode table) and the bad block list.
3853          */
3854         if (!ext2fs_test_block_bitmap2(ctx->block_found_map, blk)) {
3855                 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
3856                 return 0;
3857         }
3858         /*
3859          * Try to find the where the filesystem block was used...
3860          */
3861         first_block = fs->super->s_first_data_block;
3862
3863         for (i = 0; i < fs->group_desc_count; i++ ) {
3864                 pctx->group = i;
3865                 pctx->blk = blk;
3866                 if (!ext2fs_bg_has_super(fs, i))
3867                         goto skip_super;
3868                 if (blk == first_block) {
3869                         if (i == 0) {
3870                                 if (fix_problem(ctx,
3871                                                 PR_1_BAD_PRIMARY_SUPERBLOCK,
3872                                                 pctx)) {
3873                                         *block_nr = 0;
3874                                         return BLOCK_CHANGED;
3875                                 }
3876                                 return 0;
3877                         }
3878                         fix_problem(ctx, PR_1_BAD_SUPERBLOCK, pctx);
3879                         return 0;
3880                 }
3881                 if ((blk > first_block) &&
3882                     (blk <= first_block + fs->desc_blocks)) {
3883                         if (i == 0) {
3884                                 pctx->blk = *block_nr;
3885                                 if (fix_problem(ctx,
3886                         PR_1_BAD_PRIMARY_GROUP_DESCRIPTOR, pctx)) {
3887                                         *block_nr = 0;
3888                                         return BLOCK_CHANGED;
3889                                 }
3890                                 return 0;
3891                         }
3892                         fix_problem(ctx, PR_1_BAD_GROUP_DESCRIPTORS, pctx);
3893                         return 0;
3894                 }
3895         skip_super:
3896                 if (blk == ext2fs_block_bitmap_loc(fs, i)) {
3897                         if (fix_problem(ctx, PR_1_BB_BAD_BLOCK, pctx)) {
3898                                 ctx->invalid_block_bitmap_flag[i]++;
3899                                 ctx->invalid_bitmaps++;
3900                         }
3901                         return 0;
3902                 }
3903                 if (blk == ext2fs_inode_bitmap_loc(fs, i)) {
3904                         if (fix_problem(ctx, PR_1_IB_BAD_BLOCK, pctx)) {
3905                                 ctx->invalid_inode_bitmap_flag[i]++;
3906                                 ctx->invalid_bitmaps++;
3907                         }
3908                         return 0;
3909                 }
3910                 if ((blk >= ext2fs_inode_table_loc(fs, i)) &&
3911                     (blk < (ext2fs_inode_table_loc(fs, i) +
3912                             fs->inode_blocks_per_group))) {
3913                         /*
3914                          * If there are bad blocks in the inode table,
3915                          * the inode scan code will try to do
3916                          * something reasonable automatically.
3917                          */
3918                         return 0;
3919                 }
3920                 first_block += fs->super->s_blocks_per_group;
3921         }
3922         /*
3923          * If we've gotten to this point, then the only
3924          * possibility is that the bad block inode meta data
3925          * is using a bad block.
3926          */
3927         if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) ||
3928             (blk == p->inode->i_block[EXT2_DIND_BLOCK]) ||
3929             (blk == p->inode->i_block[EXT2_TIND_BLOCK])) {
3930                 p->bbcheck = 1;
3931                 if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, pctx)) {
3932                         *block_nr = 0;
3933                         return BLOCK_CHANGED;
3934                 }
3935                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3936                         return BLOCK_ABORT;
3937                 return 0;
3938         }
3939
3940         pctx->group = -1;
3941
3942         /* Warn user that the block wasn't claimed */
3943         fix_problem(ctx, PR_1_PROGERR_CLAIMED_BLOCK, pctx);
3944
3945         return 0;
3946 }
3947
3948 static void new_table_block(e2fsck_t ctx, blk64_t first_block, dgrp_t group,
3949                             const char *name, int num, blk64_t *new_block)
3950 {
3951         ext2_filsys fs = ctx->fs;
3952         dgrp_t          last_grp;
3953         blk64_t         old_block = *new_block;
3954         blk64_t         last_block;
3955         dgrp_t          flexbg;
3956         unsigned        flexbg_size;
3957         int             i, is_flexbg;
3958         char            *buf;
3959         struct problem_context  pctx;
3960
3961         clear_problem_context(&pctx);
3962
3963         pctx.group = group;
3964         pctx.blk = old_block;
3965         pctx.str = name;
3966
3967         /*
3968          * For flex_bg filesystems, first try to allocate the metadata
3969          * within the flex_bg, and if that fails then try finding the
3970          * space anywhere in the filesystem.
3971          */
3972         is_flexbg = ext2fs_has_feature_flex_bg(fs->super);
3973         if (is_flexbg) {
3974                 flexbg_size = 1 << fs->super->s_log_groups_per_flex;
3975                 flexbg = group / flexbg_size;
3976                 first_block = ext2fs_group_first_block2(fs,
3977                                                         flexbg_size * flexbg);
3978                 last_grp = group | (flexbg_size - 1);
3979                 if (last_grp >= fs->group_desc_count)
3980                         last_grp = fs->group_desc_count - 1;
3981                 last_block = ext2fs_group_last_block2(fs, last_grp);
3982         } else
3983                 last_block = ext2fs_group_last_block2(fs, group);
3984         pctx.errcode = ext2fs_get_free_blocks2(fs, first_block, last_block,
3985                                                num, ctx->block_found_map,
3986                                                new_block);
3987         if (is_flexbg && (pctx.errcode == EXT2_ET_BLOCK_ALLOC_FAIL))
3988                 pctx.errcode = ext2fs_get_free_blocks2(fs,
3989                                 fs->super->s_first_data_block,
3990                                 ext2fs_blocks_count(fs->super),
3991                                 num, ctx->block_found_map, new_block);
3992         if (pctx.errcode) {
3993                 pctx.num = num;
3994                 fix_problem(ctx, PR_1_RELOC_BLOCK_ALLOCATE, &pctx);
3995                 ext2fs_unmark_valid(fs);
3996                 ctx->flags |= E2F_FLAG_ABORT;
3997                 return;
3998         }
3999         pctx.errcode = ext2fs_get_mem(fs->blocksize, &buf);
4000         if (pctx.errcode) {
4001                 fix_problem(ctx, PR_1_RELOC_MEMORY_ALLOCATE, &pctx);
4002                 ext2fs_unmark_valid(fs);
4003                 ctx->flags |= E2F_FLAG_ABORT;
4004                 return;
4005         }
4006         ext2fs_mark_super_dirty(fs);
4007         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
4008         pctx.blk2 = *new_block;
4009         fix_problem(ctx, (old_block ? PR_1_RELOC_FROM_TO :
4010                           PR_1_RELOC_TO), &pctx);
4011         pctx.blk2 = 0;
4012         for (i = 0; i < num; i++) {
4013                 pctx.blk = i;
4014                 ext2fs_mark_block_bitmap2(ctx->block_found_map, (*new_block)+i);
4015                 if (old_block) {
4016                         pctx.errcode = io_channel_read_blk64(fs->io,
4017                                    old_block + i, 1, buf);
4018                         if (pctx.errcode)
4019                                 fix_problem(ctx, PR_1_RELOC_READ_ERR, &pctx);
4020                         pctx.blk = (*new_block) + i;
4021                         pctx.errcode = io_channel_write_blk64(fs->io, pctx.blk,
4022                                                               1, buf);
4023                 } else {
4024                         pctx.blk = (*new_block) + i;
4025                         pctx.errcode = ext2fs_zero_blocks2(fs, pctx.blk, 1,
4026                                                            NULL, NULL);
4027                 }
4028
4029                 if (pctx.errcode)
4030                         fix_problem(ctx, PR_1_RELOC_WRITE_ERR, &pctx);
4031         }
4032         ext2fs_free_mem(&buf);
4033 }
4034
4035 /*
4036  * This routine gets called at the end of pass 1 if bad blocks are
4037  * detected in the superblock, group descriptors, inode_bitmaps, or
4038  * block bitmaps.  At this point, all of the blocks have been mapped
4039  * out, so we can try to allocate new block(s) to replace the bad
4040  * blocks.
4041  */
4042 static void handle_fs_bad_blocks(e2fsck_t ctx)
4043 {
4044         ext2_filsys fs = ctx->fs;
4045         dgrp_t          i;
4046         blk64_t         first_block;
4047         blk64_t         new_blk;
4048
4049         for (i = 0; i < fs->group_desc_count; i++) {
4050                 first_block = ext2fs_group_first_block2(fs, i);
4051
4052                 if (ctx->invalid_block_bitmap_flag[i]) {
4053                         new_blk = ext2fs_block_bitmap_loc(fs, i);
4054                         new_table_block(ctx, first_block, i, _("block bitmap"),
4055                                         1, &new_blk);
4056                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
4057                 }
4058                 if (ctx->invalid_inode_bitmap_flag[i]) {
4059                         new_blk = ext2fs_inode_bitmap_loc(fs, i);
4060                         new_table_block(ctx, first_block, i, _("inode bitmap"),
4061                                         1, &new_blk);
4062                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
4063                 }
4064                 if (ctx->invalid_inode_table_flag[i]) {
4065                         new_blk = ext2fs_inode_table_loc(fs, i);
4066                         new_table_block(ctx, first_block, i, _("inode table"),
4067                                         fs->inode_blocks_per_group,
4068                                         &new_blk);
4069                         ext2fs_inode_table_loc_set(fs, i, new_blk);
4070                         ctx->flags |= E2F_FLAG_RESTART;
4071                 }
4072         }
4073         ctx->invalid_bitmaps = 0;
4074 }
4075
4076 /*
4077  * This routine marks all blocks which are used by the superblock,
4078  * group descriptors, inode bitmaps, and block bitmaps.
4079  */
4080 static void mark_table_blocks(e2fsck_t ctx)
4081 {
4082         ext2_filsys fs = ctx->fs;
4083         blk64_t b;
4084         dgrp_t  i;
4085         unsigned int    j;
4086         struct problem_context pctx;
4087
4088         clear_problem_context(&pctx);
4089
4090         for (i = 0; i < fs->group_desc_count; i++) {
4091                 pctx.group = i;
4092
4093                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_found_map);
4094                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_metadata_map);
4095
4096                 /*
4097                  * Mark the blocks used for the inode table
4098                  */
4099                 if (ext2fs_inode_table_loc(fs, i)) {
4100                         for (j = 0, b = ext2fs_inode_table_loc(fs, i);
4101                              j < fs->inode_blocks_per_group;
4102                              j++, b++) {
4103                                 if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4104                                                              b)) {
4105                                         pctx.blk = b;
4106                                         if (!ctx->invalid_inode_table_flag[i] &&
4107                                             fix_problem(ctx,
4108                                                 PR_1_ITABLE_CONFLICT, &pctx)) {
4109                                                 ctx->invalid_inode_table_flag[i]++;
4110                                                 ctx->invalid_bitmaps++;
4111                                         }
4112                                 } else {
4113                                     ext2fs_mark_block_bitmap2(
4114                                                 ctx->block_found_map, b);
4115                                     ext2fs_mark_block_bitmap2(
4116                                                 ctx->block_metadata_map, b);
4117                                 }
4118                         }
4119                 }
4120
4121                 /*
4122                  * Mark block used for the block bitmap
4123                  */
4124                 if (ext2fs_block_bitmap_loc(fs, i)) {
4125                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4126                                      ext2fs_block_bitmap_loc(fs, i))) {
4127                                 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
4128                                 if (fix_problem(ctx, PR_1_BB_CONFLICT, &pctx)) {
4129                                         ctx->invalid_block_bitmap_flag[i]++;
4130                                         ctx->invalid_bitmaps++;
4131                                 }
4132                         } else {
4133                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4134                                      ext2fs_block_bitmap_loc(fs, i));
4135                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4136                                      ext2fs_block_bitmap_loc(fs, i));
4137                         }
4138                 }
4139                 /*
4140                  * Mark block used for the inode bitmap
4141                  */
4142                 if (ext2fs_inode_bitmap_loc(fs, i)) {
4143                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4144                                      ext2fs_inode_bitmap_loc(fs, i))) {
4145                                 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
4146                                 if (fix_problem(ctx, PR_1_IB_CONFLICT, &pctx)) {
4147                                         ctx->invalid_inode_bitmap_flag[i]++;
4148                                         ctx->invalid_bitmaps++;
4149                                 }
4150                         } else {
4151                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4152                                      ext2fs_inode_bitmap_loc(fs, i));
4153                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4154                                      ext2fs_inode_bitmap_loc(fs, i));
4155                         }
4156                 }
4157         }
4158 }
4159
4160 /*
4161  * These subroutines short circuits ext2fs_get_blocks and
4162  * ext2fs_check_directory; we use them since we already have the inode
4163  * structure, so there's no point in letting the ext2fs library read
4164  * the inode again.
4165  */
4166 static errcode_t pass1_get_blocks(ext2_filsys fs, ext2_ino_t ino,
4167                                   blk_t *blocks)
4168 {
4169         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4170         int     i;
4171
4172         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4173                 return EXT2_ET_CALLBACK_NOTHANDLED;
4174
4175         for (i=0; i < EXT2_N_BLOCKS; i++)
4176                 blocks[i] = ctx->stashed_inode->i_block[i];
4177         return 0;
4178 }
4179
4180 static errcode_t pass1_read_inode(ext2_filsys fs, ext2_ino_t ino,
4181                                   struct ext2_inode *inode)
4182 {
4183         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4184
4185         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4186                 return EXT2_ET_CALLBACK_NOTHANDLED;
4187         *inode = *ctx->stashed_inode;
4188         return 0;
4189 }
4190
4191 static errcode_t pass1_write_inode(ext2_filsys fs, ext2_ino_t ino,
4192                             struct ext2_inode *inode)
4193 {
4194         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4195
4196         if ((ino == ctx->stashed_ino) && ctx->stashed_inode &&
4197                 (inode != ctx->stashed_inode))
4198                 *ctx->stashed_inode = *inode;
4199         return EXT2_ET_CALLBACK_NOTHANDLED;
4200 }
4201
4202 static errcode_t pass1_check_directory(ext2_filsys fs, ext2_ino_t ino)
4203 {
4204         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4205
4206         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4207                 return EXT2_ET_CALLBACK_NOTHANDLED;
4208
4209         if (!LINUX_S_ISDIR(ctx->stashed_inode->i_mode))
4210                 return EXT2_ET_NO_DIRECTORY;
4211         return 0;
4212 }
4213
4214 static errcode_t e2fsck_get_alloc_block(ext2_filsys fs, blk64_t goal,
4215                                         blk64_t *ret)
4216 {
4217         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4218         errcode_t       retval;
4219         blk64_t         new_block;
4220
4221         if (ctx->block_found_map) {
4222                 retval = ext2fs_new_block2(fs, goal, ctx->block_found_map,
4223                                            &new_block);
4224                 if (retval)
4225                         return retval;
4226                 if (fs->block_map) {
4227                         ext2fs_mark_block_bitmap2(fs->block_map, new_block);
4228                         ext2fs_mark_bb_dirty(fs);
4229                 }
4230         } else {
4231                 if (!fs->block_map) {
4232                         retval = ext2fs_read_block_bitmap(fs);
4233                         if (retval)
4234                                 return retval;
4235                 }
4236
4237                 retval = ext2fs_new_block2(fs, goal, fs->block_map, &new_block);
4238                 if (retval)
4239                         return retval;
4240         }
4241
4242         *ret = new_block;
4243         return (0);
4244 }
4245
4246 static errcode_t e2fsck_new_range(ext2_filsys fs, int flags, blk64_t goal,
4247                                   blk64_t len, blk64_t *pblk, blk64_t *plen)
4248 {
4249         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4250         errcode_t       retval;
4251
4252         if (ctx->block_found_map)
4253                 return ext2fs_new_range(fs, flags, goal, len,
4254                                         ctx->block_found_map, pblk, plen);
4255
4256         if (!fs->block_map) {
4257                 retval = ext2fs_read_block_bitmap(fs);
4258                 if (retval)
4259                         return retval;
4260         }
4261
4262         return ext2fs_new_range(fs, flags, goal, len, fs->block_map,
4263                                 pblk, plen);
4264 }
4265
4266 static void e2fsck_block_alloc_stats(ext2_filsys fs, blk64_t blk, int inuse)
4267 {
4268         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4269
4270         /* Never free a critical metadata block */
4271         if (ctx->block_found_map &&
4272             ctx->block_metadata_map &&
4273             inuse < 0 &&
4274             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk))
4275                 return;
4276
4277         if (ctx->block_found_map) {
4278                 if (inuse > 0)
4279                         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4280                 else
4281                         ext2fs_unmark_block_bitmap2(ctx->block_found_map, blk);
4282         }
4283 }
4284
4285 static void e2fsck_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
4286                                            blk_t num, int inuse)
4287 {
4288         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4289
4290         /* Never free a critical metadata block */
4291         if (ctx->block_found_map &&
4292             ctx->block_metadata_map &&
4293             inuse < 0 &&
4294             ext2fs_test_block_bitmap_range2(ctx->block_metadata_map, blk, num))
4295                 return;
4296
4297         if (ctx->block_found_map) {
4298                 if (inuse > 0)
4299                         ext2fs_mark_block_bitmap_range2(ctx->block_found_map,
4300                                                         blk, num);
4301                 else
4302                         ext2fs_unmark_block_bitmap_range2(ctx->block_found_map,
4303                                                         blk, num);
4304         }
4305 }
4306
4307 void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts)
4308 {
4309         ext2_filsys fs = ctx->fs;
4310
4311         if (use_shortcuts) {
4312                 fs->get_blocks = pass1_get_blocks;
4313                 fs->check_directory = pass1_check_directory;
4314                 fs->read_inode = pass1_read_inode;
4315                 fs->write_inode = pass1_write_inode;
4316                 ctx->stashed_ino = 0;
4317         } else {
4318                 fs->get_blocks = 0;
4319                 fs->check_directory = 0;
4320                 fs->read_inode = 0;
4321                 fs->write_inode = 0;
4322         }
4323 }
4324
4325 void e2fsck_intercept_block_allocations(e2fsck_t ctx)
4326 {
4327         ext2fs_set_alloc_block_callback(ctx->fs, e2fsck_get_alloc_block, 0);
4328         ext2fs_set_block_alloc_stats_callback(ctx->fs,
4329                                                 e2fsck_block_alloc_stats, 0);
4330         ext2fs_set_new_range_callback(ctx->fs, e2fsck_new_range, NULL);
4331         ext2fs_set_block_alloc_stats_range_callback(ctx->fs,
4332                                         e2fsck_block_alloc_stats_range, NULL);
4333 }