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  *      - An icount mechanism is used to keep track of
  24  *        inodes with bad fields and its badness        (ctx->inode_badness)
  25  *      - A bitmap of which inodes are in bad blocks.   (inode_bb_map)
  26  *      - A bitmap of which inodes are imagic inodes.   (inode_imagic_map)
  27  *      - A bitmap of which inodes need to be expanded  (expand_eisize_map)
  28  *      - A bitmap of which blocks are in use.          (block_found_map)
  29  *      - A bitmap of which blocks are in use by two inodes     (block_dup_map)
  30  *      - The data blocks of the directory inodes.      (dir_map)
  31  *      - Ref counts for ea_inodes.                     (ea_inode_refs)
  32  *
  33  * Pass 1 is designed to stash away enough information so that the
  34  * other passes should not need to read in the inode information
  35  * during the normal course of a filesystem check.  (Although if an
  36  * inconsistency is detected, other passes may need to read in an
  37  * inode to fix it.)
  38  *
  39  * Note that pass 1B will be invoked if there are any duplicate blocks
  40  * found.
  41  */
  42
  43 #define _GNU_SOURCE 1 /* get strnlen() */
  44 #include "config.h"
  45 #include <string.h>
  46 #include <time.h>
  47 #ifdef HAVE_ERRNO_H
  48 #include <errno.h>
  49 #endif
  50
  51 #include "e2fsck.h"
  52 #include <ext2fs/ext2_ext_attr.h>
  53
  54 #include "problem.h"
  55
  56 #ifdef NO_INLINE_FUNCS
  57 #define _INLINE_
  58 #else
  59 #define _INLINE_ inline
  60 #endif
  61
  62 #undef DEBUG
  63
  64 struct ea_quota {
  65         blk64_t blocks;
  66         __u64 inodes;
  67 };
  68
  69 static int process_block(ext2_filsys fs, blk64_t        *blocknr,
  70                          e2_blkcnt_t blockcnt, blk64_t ref_blk,
  71                          int ref_offset, void *priv_data);
  72 static int process_bad_block(ext2_filsys fs, blk64_t *block_nr,
  73                              e2_blkcnt_t blockcnt, blk64_t ref_blk,
  74                              int ref_offset, void *priv_data);
  75 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
  76                          char *block_buf,
  77                          const struct ea_quota *ea_ibody_quota);
  78 static void mark_table_blocks(e2fsck_t ctx);
  79 static void alloc_bb_map(e2fsck_t ctx);
  80 static void alloc_imagic_map(e2fsck_t ctx);
  81 static void add_encrypted_dir(e2fsck_t ctx, ino_t ino);
  82 static void handle_fs_bad_blocks(e2fsck_t ctx);
  83 static void process_inodes(e2fsck_t ctx, char *block_buf);
  84 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b);
  85 static errcode_t scan_callback(ext2_filsys fs, ext2_inode_scan scan,
  86                                   dgrp_t group, void * priv_data);
  87 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
  88                                     char *block_buf, int adjust_sign);
  89 /* static char *describe_illegal_block(ext2_filsys fs, blk64_t block); */
  90
  91 struct process_block_struct {
  92         ext2_ino_t      ino;
  93         unsigned        is_dir:1, is_reg:1, clear:1, suppress:1,
  94                                 fragmented:1, compressed:1, bbcheck:1,
  95                                 inode_modified:1;
  96         blk64_t         num_blocks;
  97         blk64_t         max_blocks;
  98         blk64_t         last_block;
  99         e2_blkcnt_t     last_init_lblock;
 100         e2_blkcnt_t     last_db_block;
 101         int             num_illegal_blocks;
 102         blk64_t         previous_block;
 103         struct ext2_inode *inode;
 104         struct problem_context *pctx;
 105         ext2fs_block_bitmap fs_meta_blocks;
 106         e2fsck_t        ctx;
 107         blk64_t         next_lblock;
 108         struct extent_tree_info eti;
 109 };
 110
 111 struct process_inode_block {
 112         ext2_ino_t ino;
 113         struct ea_quota ea_ibody_quota;
 114         struct ext2_inode_large inode;
 115 };
 116
 117 struct scan_callback_struct {
 118         e2fsck_t        ctx;
 119         char            *block_buf;
 120 };
 121
 122 /*
 123  * For the inodes to process list.
 124  */
 125 static struct process_inode_block *inodes_to_process;
 126 static int process_inode_count;
 127
 128 static __u64 ext2_max_sizes[EXT2_MAX_BLOCK_LOG_SIZE -
 129                             EXT2_MIN_BLOCK_LOG_SIZE + 1];
 130
 131 /*
 132  * Free all memory allocated by pass1 in preparation for restarting
 133  * things.
 134  */
 135 static void unwind_pass1(ext2_filsys fs EXT2FS_ATTR((unused)))
 136 {
 137         ext2fs_free_mem(&inodes_to_process);
 138         inodes_to_process = 0;
 139 }
 140
 141 /*
 142  * Check to make sure a device inode is real.  Returns 1 if the device
 143  * checks out, 0 if not.
 144  *
 145  * Note: this routine is now also used to check FIFO's and Sockets,
 146  * since they have the same requirement; the i_block fields should be
 147  * zero.
 148  */
 149 int e2fsck_pass1_check_device_inode(ext2_filsys fs EXT2FS_ATTR((unused)),
 150                                     struct ext2_inode *inode)
 151 {
 152         int     i;
 153
 154         /*
 155          * If the index or extents flag is set, then this is a bogus
 156          * device/fifo/socket
 157          */
 158         if (inode->i_flags & (EXT2_INDEX_FL | EXT4_EXTENTS_FL))
 159                 return 0;
 160
 161         /*
 162          * We should be able to do the test below all the time, but
 163          * because the kernel doesn't forcibly clear the device
 164          * inode's additional i_block fields, there are some rare
 165          * occasions when a legitimate device inode will have non-zero
 166          * additional i_block fields.  So for now, we only complain
 167          * when the immutable flag is set, which should never happen
 168          * for devices.  (And that's when the problem is caused, since
 169          * you can't set or clear immutable flags for devices.)  Once
 170          * the kernel has been fixed we can change this...
 171          */
 172         if (inode->i_flags & (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)) {
 173                 for (i=4; i < EXT2_N_BLOCKS; i++)
 174                         if (inode->i_block[i])
 175                                 return 0;
 176         }
 177         return 1;
 178 }
 179
 180 /*
 181  * Check to make sure a symlink inode is real.  Returns 1 if the symlink
 182  * checks out, 0 if not.
 183  */
 184 static int check_symlink(e2fsck_t ctx, struct problem_context *pctx,
 185                          ext2_ino_t ino, struct ext2_inode *inode, char *buf)
 186 {
 187         unsigned int buflen;
 188         unsigned int len;
 189         blk64_t blk;
 190
 191         if ((inode->i_size_high || inode->i_size == 0) ||
 192             (inode->i_flags & EXT2_INDEX_FL))
 193                 return 0;
 194
 195         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
 196                 size_t inline_size;
 197
 198                 if (inode->i_flags & EXT4_EXTENTS_FL)
 199                         return 0;
 200                 if (ext2fs_inline_data_size(ctx->fs, ino, &inline_size))
 201                         return 0;
 202                 if (inode->i_size != inline_size)
 203                         return 0;
 204
 205                 return 1;
 206         }
 207
 208         if (ext2fs_is_fast_symlink(inode)) {
 209                 if (inode->i_flags & EXT4_EXTENTS_FL)
 210                         return 0;
 211                 buf = (char *)inode->i_block;
 212                 buflen = sizeof(inode->i_block);
 213         } else {
 214                 ext2_extent_handle_t    handle;
 215                 struct ext2_extent_info info;
 216                 struct ext2fs_extent    extent;
 217                 int i;
 218
 219                 if (inode->i_flags & EXT4_EXTENTS_FL) {
 220                         if (ext2fs_extent_open2(ctx->fs, ino, inode, &handle))
 221                                 return 0;
 222                         if (ext2fs_extent_get_info(handle, &info) ||
 223                             (info.num_entries != 1) ||
 224                             (info.max_depth != 0)) {
 225                                 ext2fs_extent_free(handle);
 226                                 return 0;
 227                         }
 228                         if (ext2fs_extent_get(handle, EXT2_EXTENT_ROOT,
 229                                               &extent) ||
 230                             (extent.e_lblk != 0) ||
 231                             (extent.e_len != 1)) {
 232                                 ext2fs_extent_free(handle);
 233                                 return 0;
 234                         }
 235                         blk = extent.e_pblk;
 236                         ext2fs_extent_free(handle);
 237                 } else {
 238                         blk = inode->i_block[0];
 239
 240                         for (i = 1; i < EXT2_N_BLOCKS; i++)
 241                                 if (inode->i_block[i])
 242                                         return 0;
 243                 }
 244
 245                 if (blk < ctx->fs->super->s_first_data_block ||
 246                     blk >= ext2fs_blocks_count(ctx->fs->super))
 247                         return 0;
 248
 249                 if (io_channel_read_blk64(ctx->fs->io, blk, 1, buf))
 250                         return 0;
 251
 252                 buflen = ctx->fs->blocksize;
 253         }
 254
 255         if (inode->i_flags & EXT4_ENCRYPT_FL)
 256                 len = ext2fs_le16_to_cpu(*(__u16 *)buf) + 2;
 257         else {
 258                 len = strnlen(buf, buflen);
 259
 260                 /* Add missing NUL terminator at end of symlink (LU-1540),
 261                  * but only offer to fix this in pass1, not from pass2. */
 262                 if (len > inode->i_size && pctx != NULL &&
 263                     fix_problem(ctx, PR_1_SYMLINK_NUL, pctx)) {
 264                         buf[inode->i_size] = '\0';
 265                         if (ext2fs_is_fast_symlink(inode)) {
 266                                 e2fsck_write_inode(ctx, ino,
 267                                                    inode, "check_ext_attr");
 268                         } else {
 269                                 if (io_channel_write_blk64(ctx->fs->io,
 270                                                            blk, 1, buf))
 271                                         return 0;
 272                         }
 273                         len = inode->i_size;
 274                 }
 275         }
 276
 277         if (len >= buflen)
 278                 return 0;
 279
 280         if (len != inode->i_size)
 281                 return 0;
 282
 283         return 1;
 284 }
 285
 286 int e2fsck_pass1_check_symlink(e2fsck_t ctx, ext2_ino_t ino,
 287                                struct ext2_inode *inode, char *buf)
 288 {
 289         return check_symlink(ctx, NULL, ino, inode, buf);
 290 }
 291
 292 /*
 293  * If the extents or inlinedata flags are set on the inode, offer to clear 'em.
 294  */
 295 #define BAD_SPECIAL_FLAGS (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)
 296 static void check_extents_inlinedata(e2fsck_t ctx,
 297                                      struct problem_context *pctx)
 298 {
 299         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 300                 return;
 301
 302         if (!fix_problem(ctx, PR_1_SPECIAL_EXTENTS_IDATA, pctx))
 303                 return;
 304
 305         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 306         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 307 }
 308 #undef BAD_SPECIAL_FLAGS
 309
 310 /*
 311  * If the immutable (or append-only) flag is set on the inode, offer
 312  * to clear it.
 313  */
 314 #define BAD_SPECIAL_FLAGS (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)
 315 static void check_immutable(e2fsck_t ctx, struct problem_context *pctx)
 316 {
 317         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 318                 return;
 319
 320         e2fsck_mark_inode_bad(ctx, pctx->ino, BADNESS_NORMAL);
 321         if (!fix_problem(ctx, PR_1_SET_IMMUTABLE, pctx))
 322                 return;
 323
 324         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 325         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 326 }
 327
 328 /*
 329  * If device, fifo or socket, check size is zero -- if not offer to
 330  * clear it
 331  */
 332 static void check_size(e2fsck_t ctx, struct problem_context *pctx)
 333 {
 334         struct ext2_inode *inode = pctx->inode;
 335
 336         if (EXT2_I_SIZE(inode) == 0)
 337                 return;
 338
 339         e2fsck_mark_inode_bad(ctx, pctx->ino, BADNESS_NORMAL);
 340         if (!fix_problem(ctx, PR_1_SET_NONZSIZE, pctx))
 341                 return;
 342
 343         ext2fs_inode_size_set(ctx->fs, inode, 0);
 344         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 345 }
 346
 347 /*
 348  * For a given size, calculate how many blocks would be charged towards quota.
 349  */
 350 static blk64_t size_to_quota_blocks(ext2_filsys fs, size_t size)
 351 {
 352         blk64_t clusters;
 353
 354         clusters = DIV_ROUND_UP(size, fs->blocksize << fs->cluster_ratio_bits);
 355         return EXT2FS_C2B(fs, clusters);
 356 }
 357
 358 /*
 359  * Check validity of EA inode. Return 0 if EA inode is valid, otherwise return
 360  * the problem code.
 361  */
 362 static problem_t check_large_ea_inode(e2fsck_t ctx,
 363                                       struct ext2_ext_attr_entry *entry,
 364                                       struct problem_context *pctx,
 365                                       blk64_t *quota_blocks)
 366 {
 367         struct ext2_inode inode;
 368         __u32 hash;
 369         errcode_t retval;
 370
 371         /* Check if inode is within valid range */
 372         if ((entry->e_value_inum < EXT2_FIRST_INODE(ctx->fs->super)) ||
 373             (entry->e_value_inum > ctx->fs->super->s_inodes_count)) {
 374                 pctx->num = entry->e_value_inum;
 375                 return PR_1_ATTR_VALUE_EA_INODE;
 376         }
 377
 378         e2fsck_read_inode(ctx, entry->e_value_inum, &inode, "pass1");
 379
 380         retval = ext2fs_ext_attr_hash_entry2(ctx->fs, entry, NULL, &hash);
 381         if (retval) {
 382                 com_err("check_large_ea_inode", retval,
 383                         _("while hashing entry with e_value_inum = %u"),
 384                         entry->e_value_inum);
 385                 fatal_error(ctx, 0);
 386         }
 387
 388         if (hash == entry->e_hash) {
 389                 *quota_blocks = size_to_quota_blocks(ctx->fs,
 390                                                      entry->e_value_size);
 391         } else {
 392                 /* This might be an old Lustre-style ea_inode reference. */
 393                 if (inode.i_mtime == pctx->ino &&
 394                     inode.i_generation == pctx->inode->i_generation) {
 395                         *quota_blocks = 0;
 396                 } else {
 397                         /* If target inode is also missing EA_INODE flag,
 398                          * this is likely to be a bad reference.
 399                          */
 400                         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 401                                 pctx->num = entry->e_value_inum;
 402                                 return PR_1_ATTR_VALUE_EA_INODE;
 403                         } else {
 404                                 pctx->num = entry->e_hash;
 405                                 return PR_1_ATTR_HASH;
 406                         }
 407                 }
 408         }
 409
 410         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 411                 pctx->num = entry->e_value_inum;
 412                 if (fix_problem(ctx, PR_1_ATTR_SET_EA_INODE_FL, pctx)) {
 413                         inode.i_flags |= EXT4_EA_INODE_FL;
 414                         ext2fs_write_inode(ctx->fs, entry->e_value_inum,
 415                                            &inode);
 416                 } else {
 417                         return PR_1_ATTR_NO_EA_INODE_FL;
 418                 }
 419         }
 420         return 0;
 421 }
 422
 423 static void inc_ea_inode_refs(e2fsck_t ctx, struct problem_context *pctx,
 424                               struct ext2_ext_attr_entry *first, void *end)
 425 {
 426         struct ext2_ext_attr_entry *entry;
 427
 428         for (entry = first;
 429              (void *)entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry);
 430              entry = EXT2_EXT_ATTR_NEXT(entry)) {
 431                 if (!entry->e_value_inum)
 432                         continue;
 433                 if (!ctx->ea_inode_refs) {
 434                         pctx->errcode = ea_refcount_create(0,
 435                                                            &ctx->ea_inode_refs);
 436                         if (pctx->errcode) {
 437                                 pctx->num = 4;
 438                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
 439                                 ctx->flags |= E2F_FLAG_ABORT;
 440                                 return;
 441                         }
 442                 }
 443                 ea_refcount_increment(ctx->ea_inode_refs, entry->e_value_inum,
 444                                       0);
 445         }
 446 }
 447
 448 static void check_ea_in_inode(e2fsck_t ctx, struct problem_context *pctx,
 449                               struct ea_quota *ea_ibody_quota)
 450 {
 451         struct ext2_super_block *sb = ctx->fs->super;
 452         struct ext2_inode_large *inode;
 453         struct ext2_ext_attr_entry *entry;
 454         char *start, *header, *end;
 455         unsigned int storage_size, remain;
 456         problem_t problem = 0;
 457         region_t region = 0;
 458
 459         ea_ibody_quota->blocks = 0;
 460         ea_ibody_quota->inodes = 0;
 461
 462         inode = (struct ext2_inode_large *) pctx->inode;
 463         storage_size = EXT2_INODE_SIZE(ctx->fs->super) -
 464                 EXT2_GOOD_OLD_INODE_SIZE - inode->i_extra_isize;
 465         header = ((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 466                  inode->i_extra_isize;
 467         end = header + storage_size;
 468         entry = &IHDR(inode)->h_first_entry[0];
 469         start = (char *)entry;
 470
 471         /* scan all entry's headers first */
 472
 473         /* take finish entry 0UL into account */
 474         remain = storage_size - sizeof(__u32);
 475
 476         region = region_create(0, storage_size);
 477         if (!region) {
 478                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
 479                 problem = 0;
 480                 ctx->flags |= E2F_FLAG_ABORT;
 481                 return;
 482         }
 483         if (region_allocate(region, 0, sizeof(__u32))) {
 484                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 485                 goto fix;
 486         }
 487
 488         while (remain >= sizeof(struct ext2_ext_attr_entry) &&
 489                !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 490                 __u32 hash;
 491
 492                 if (region_allocate(region, (char *)entry - (char *)header,
 493                                     EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
 494                         problem = PR_1_INODE_EA_ALLOC_COLLISION;
 495                         goto fix;
 496                 }
 497
 498                 /* header eats this space */
 499                 remain -= sizeof(struct ext2_ext_attr_entry);
 500
 501                 /* is attribute name valid? */
 502                 if (EXT2_EXT_ATTR_SIZE(entry->e_name_len) > remain) {
 503                         pctx->num = entry->e_name_len;
 504                         problem = PR_1_ATTR_NAME_LEN;
 505                         goto fix;
 506                 }
 507
 508                 /* attribute len eats this space */
 509                 remain -= EXT2_EXT_ATTR_SIZE(entry->e_name_len);
 510
 511                 if (entry->e_value_inum == 0) {
 512                         /* check value size */
 513                         if (entry->e_value_size > remain) {
 514                                 pctx->num = entry->e_value_size;
 515                                 problem = PR_1_ATTR_VALUE_SIZE;
 516                                 goto fix;
 517                         }
 518
 519                         if (entry->e_value_size &&
 520                             region_allocate(region,
 521                                             sizeof(__u32) + entry->e_value_offs,
 522                                             EXT2_EXT_ATTR_SIZE(
 523                                                 entry->e_value_size))) {
 524                                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 525                                 goto fix;
 526                         }
 527
 528                         hash = ext2fs_ext_attr_hash_entry(entry,
 529                                                           start + entry->e_value_offs);
 530
 531                         /* e_hash may be 0 in older inode's ea */
 532                         if (entry->e_hash != 0 && entry->e_hash != hash) {
 533                                 pctx->num = entry->e_hash;
 534                                 problem = PR_1_ATTR_HASH;
 535                                 goto fix;
 536                         }
 537                 } else {
 538                         blk64_t quota_blocks;
 539
 540                         problem = check_large_ea_inode(ctx, entry, pctx,
 541                                                        &quota_blocks);
 542                         if (problem != 0)
 543                                 goto fix;
 544
 545                         ea_ibody_quota->blocks += quota_blocks;
 546                         ea_ibody_quota->inodes++;
 547                 }
 548
 549                 /* If EA value is stored in external inode then it does not
 550                  * consume space here */
 551                 if (entry->e_value_inum == 0)
 552                         remain -= entry->e_value_size;
 553
 554                 entry = EXT2_EXT_ATTR_NEXT(entry);
 555         }
 556
 557         if (region_allocate(region, (char *)entry - (char *)header,
 558                             sizeof(__u32))) {
 559                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 560                 goto fix;
 561         }
 562 fix:
 563         if (region)
 564                 region_free(region);
 565         /*
 566          * it seems like a corruption. it's very unlikely we could repair
 567          * EA(s) in automatic fashion -bzzz
 568          */
 569         if (problem == 0 || !fix_problem(ctx, problem, pctx)) {
 570                 inc_ea_inode_refs(ctx, pctx,
 571                                   (struct ext2_ext_attr_entry *)start, end);
 572                 return;
 573         }
 574
 575         /* simply remove all possible EA(s) */
 576         *((__u32 *)header) = 0UL;
 577         e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 578                                 EXT2_INODE_SIZE(sb), "pass1");
 579         ea_ibody_quota->blocks = 0;
 580         ea_ibody_quota->inodes = 0;
 581 }
 582
 583 static int check_inode_extra_negative_epoch(__u32 xtime, __u32 extra) {
 584         return (xtime & (1U << 31)) != 0 &&
 585                 (extra & EXT4_EPOCH_MASK) == EXT4_EPOCH_MASK;
 586 }
 587
 588 #define CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, xtime) \
 589         check_inode_extra_negative_epoch(inode->i_##xtime, \
 590                                          inode->i_##xtime##_extra)
 591
 592 /* When today's date is earlier than 2242, we assume that atimes,
 593  * ctimes, crtimes, and mtimes with years in the range 2310..2378 are
 594  * actually pre-1970 dates mis-encoded.
 595  */
 596 #define EXT4_EXTRA_NEGATIVE_DATE_CUTOFF 2 * (1LL << 32)
 597
 598 static void check_inode_extra_space(e2fsck_t ctx, struct problem_context *pctx,
 599                                     struct ea_quota *ea_ibody_quota)
 600 {
 601         struct ext2_super_block *sb = ctx->fs->super;
 602         struct ext2_inode_large *inode;
 603         __u32 *eamagic;
 604         int min, max, dirty = 0;
 605
 606         ea_ibody_quota->blocks = 0;
 607         ea_ibody_quota->inodes = 0;
 608
 609         inode = (struct ext2_inode_large *) pctx->inode;
 610         if (EXT2_INODE_SIZE(sb) == EXT2_GOOD_OLD_INODE_SIZE) {
 611                 /* this isn't large inode. so, nothing to check */
 612                 return;
 613         }
 614
 615 #if 0
 616         printf("inode #%u, i_extra_size %d\n", pctx->ino,
 617                         inode->i_extra_isize);
 618 #endif
 619         /* i_extra_isize must cover i_extra_isize + i_checksum_hi at least */
 620         min = sizeof(inode->i_extra_isize) + sizeof(inode->i_checksum_hi);
 621         max = EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE;
 622         /*
 623          * For now we will allow i_extra_isize to be 0, but really
 624          * implementations should never allow i_extra_isize to be 0
 625          */
 626         if (inode->i_extra_isize &&
 627             (inode->i_extra_isize < min || inode->i_extra_isize > max ||
 628              inode->i_extra_isize & 3)) {
 629                 e2fsck_mark_inode_bad(ctx, pctx->ino, BADNESS_NORMAL);
 630                 if (!fix_problem(ctx, PR_1_EXTRA_ISIZE, pctx))
 631                         return;
 632                 if (inode->i_extra_isize < min || inode->i_extra_isize > max)
 633                         inode->i_extra_isize = ctx->want_extra_isize;
 634                 else
 635                         inode->i_extra_isize = (inode->i_extra_isize + 3) & ~3;
 636                 dirty = 1;
 637
 638                 goto out;
 639         }
 640
 641         /* check if there is no place for an EA header */
 642         if (inode->i_extra_isize >= max - sizeof(__u32))
 643                 return;
 644
 645         eamagic = &IHDR(inode)->h_magic;
 646         if (*eamagic != EXT2_EXT_ATTR_MAGIC &&
 647             (ctx->flags & E2F_FLAG_EXPAND_EISIZE) &&
 648             (inode->i_extra_isize < ctx->want_extra_isize)) {
 649                 fix_problem(ctx, PR_1_EXPAND_EISIZE, pctx);
 650                 memset((char *)inode + EXT2_GOOD_OLD_INODE_SIZE, 0,
 651                         EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE);
 652                 inode->i_extra_isize = ctx->want_extra_isize;
 653                 dirty = 1;
 654                 if (inode->i_extra_isize < ctx->min_extra_isize)
 655                         ctx->min_extra_isize = inode->i_extra_isize;
 656         }
 657
 658         if (*eamagic == EXT2_EXT_ATTR_MAGIC)
 659                 check_ea_in_inode(ctx, pctx, ea_ibody_quota);
 660
 661         /*
 662          * If the inode's extended atime (ctime, crtime, mtime) is stored in
 663          * the old, invalid format, repair it.
 664          */
 665         if (((sizeof(time_t) <= 4) ||
 666              (((sizeof(time_t) > 4) &&
 667                ctx->now < EXT4_EXTRA_NEGATIVE_DATE_CUTOFF))) &&
 668             (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime) ||
 669              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime) ||
 670              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime) ||
 671              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))) {
 672
 673                 if (!fix_problem(ctx, PR_1_EA_TIME_OUT_OF_RANGE, pctx))
 674                         return;
 675
 676                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime))
 677                         inode->i_atime_extra &= ~EXT4_EPOCH_MASK;
 678                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime))
 679                         inode->i_ctime_extra &= ~EXT4_EPOCH_MASK;
 680                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime))
 681                         inode->i_crtime_extra &= ~EXT4_EPOCH_MASK;
 682                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))
 683                         inode->i_mtime_extra &= ~EXT4_EPOCH_MASK;
 684                 dirty = 1;
 685                 e2fsck_mark_inode_bad(ctx, pctx->ino, BADNESS_HIGH);
 686         }
 687
 688 out:
 689         if (dirty)
 690                 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 691                                         EXT2_INODE_SIZE(sb), "pass1");
 692 }
 693
 694 /*
 695  * Check to see if the inode might really be a directory, despite i_mode
 696  *
 697  * This is a lot of complexity for something for which I'm not really
 698  * convinced happens frequently in the wild.  If for any reason this
 699  * causes any problems, take this code out.
 700  * [tytso:20070331.0827EDT]
 701  */
 702 static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx,
 703                                 char *buf)
 704 {
 705         struct ext2_inode *inode = pctx->inode;
 706         struct ext2_dir_entry   *dirent;
 707         errcode_t               retval;
 708         blk64_t                 blk;
 709         unsigned int            i, rec_len, not_device = 0;
 710         int                     extent_fs;
 711         int                     inlinedata_fs;
 712
 713         /*
 714          * If the mode looks OK, we believe it.  If the first block in
 715          * the i_block array is 0, this cannot be a directory. If the
 716          * inode is extent-mapped, it is still the case that the latter
 717          * cannot be 0 - the magic number in the extent header would make
 718          * it nonzero.
 719          */
 720         if (LINUX_S_ISDIR(inode->i_mode) || LINUX_S_ISREG(inode->i_mode) ||
 721             LINUX_S_ISLNK(inode->i_mode) || inode->i_block[0] == 0)
 722                 return;
 723
 724         /*
 725          * Check the block numbers in the i_block array for validity:
 726          * zero blocks are skipped (but the first one cannot be zero -
 727          * see above), other blocks are checked against the first and
 728          * max data blocks (from the the superblock) and against the
 729          * block bitmap. Any invalid block found means this cannot be
 730          * a directory.
 731          *
 732          * If there are non-zero blocks past the fourth entry, then
 733          * this cannot be a device file: we remember that for the next
 734          * check.
 735          *
 736          * For extent mapped files, we don't do any sanity checking:
 737          * just try to get the phys block of logical block 0 and run
 738          * with it.
 739          *
 740          * For inline data files, we just try to get the size of inline
 741          * data.  If it's true, we will treat it as a directory.
 742          */
 743
 744         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
 745         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
 746         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL)) {
 747                 size_t size;
 748                 __u32 dotdot;
 749                 unsigned int rec_len2;
 750                 struct ext2_dir_entry de;
 751
 752                 if (ext2fs_inline_data_size(ctx->fs, pctx->ino, &size))
 753                         return;
 754                 /*
 755                  * If the size isn't a multiple of 4, it's probably not a
 756                  * directory??
 757                  */
 758                 if (size & 3)
 759                         return;
 760                 /*
 761                  * If the first 10 bytes don't look like a directory entry,
 762                  * it's probably not a directory.
 763                  */
 764                 memcpy(&dotdot, inode->i_block, sizeof(dotdot));
 765                 memcpy(&de, ((char *)inode->i_block) + EXT4_INLINE_DATA_DOTDOT_SIZE,
 766                        EXT2_DIR_NAME_LEN(0));
 767                 dotdot = ext2fs_le32_to_cpu(dotdot);
 768                 de.inode = ext2fs_le32_to_cpu(de.inode);
 769                 de.rec_len = ext2fs_le16_to_cpu(de.rec_len);
 770                 ext2fs_get_rec_len(ctx->fs, &de, &rec_len2);
 771                 if (dotdot >= ctx->fs->super->s_inodes_count ||
 772                     (dotdot < EXT2_FIRST_INO(ctx->fs->super) &&
 773                      dotdot != EXT2_ROOT_INO) ||
 774                     de.inode >= ctx->fs->super->s_inodes_count ||
 775                     (de.inode < EXT2_FIRST_INO(ctx->fs->super) &&
 776                      de.inode != 0) ||
 777                     rec_len2 > EXT4_MIN_INLINE_DATA_SIZE -
 778                               EXT4_INLINE_DATA_DOTDOT_SIZE)
 779                         return;
 780                 /* device files never have a "system.data" entry */
 781                 goto isdir;
 782         } else if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) {
 783                 /* extent mapped */
 784                 if  (ext2fs_bmap2(ctx->fs, pctx->ino, inode, 0, 0, 0, 0,
 785                                  &blk))
 786                         return;
 787                 /* device files are never extent mapped */
 788                 not_device++;
 789         } else {
 790                 for (i=0; i < EXT2_N_BLOCKS; i++) {
 791                         blk = inode->i_block[i];
 792                         if (!blk)
 793                                 continue;
 794                         if (i >= 4)
 795                                 not_device++;
 796
 797                         if (blk < ctx->fs->super->s_first_data_block ||
 798                             blk >= ext2fs_blocks_count(ctx->fs->super) ||
 799                             ext2fs_fast_test_block_bitmap2(ctx->block_found_map,
 800                                                            blk))
 801                                 return; /* Invalid block, can't be dir */
 802                 }
 803                 blk = inode->i_block[0];
 804         }
 805
 806         /*
 807          * If the mode says this is a device file and the i_links_count field
 808          * is sane and we have not ruled it out as a device file previously,
 809          * we declare it a device file, not a directory.
 810          */
 811         if ((LINUX_S_ISCHR(inode->i_mode) || LINUX_S_ISBLK(inode->i_mode)) &&
 812             (inode->i_links_count == 1) && !not_device)
 813                 return;
 814
 815         /* read the first block */
 816         ehandler_operation(_("reading directory block"));
 817         retval = ext2fs_read_dir_block4(ctx->fs, blk, buf, 0, pctx->ino);
 818         ehandler_operation(0);
 819         if (retval)
 820                 return;
 821
 822         dirent = (struct ext2_dir_entry *) buf;
 823         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 824         if (retval)
 825                 return;
 826         if ((ext2fs_dirent_name_len(dirent) != 1) ||
 827             (dirent->name[0] != '.') ||
 828             (dirent->inode != pctx->ino) ||
 829             (rec_len < 12) ||
 830             (rec_len % 4) ||
 831             (rec_len >= ctx->fs->blocksize - 12))
 832                 return;
 833
 834         dirent = (struct ext2_dir_entry *) (buf + rec_len);
 835         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 836         if (retval)
 837                 return;
 838         if ((ext2fs_dirent_name_len(dirent) != 2) ||
 839             (dirent->name[0] != '.') ||
 840             (dirent->name[1] != '.') ||
 841             (rec_len < 12) ||
 842             (rec_len % 4))
 843                 return;
 844
 845 isdir:
 846         e2fsck_mark_inode_bad(ctx, pctx->ino, BADNESS_NORMAL);
 847         if (fix_problem(ctx, PR_1_TREAT_AS_DIRECTORY, pctx)) {
 848                 inode->i_mode = (inode->i_mode & 07777) | LINUX_S_IFDIR;
 849                 e2fsck_write_inode_full(ctx, pctx->ino, inode,
 850                                         EXT2_INODE_SIZE(ctx->fs->super),
 851                                         "check_is_really_dir");
 852         }
 853 }
 854
 855 extern errcode_t e2fsck_setup_icount(e2fsck_t ctx, const char *icount_name,
 856                                      int flags, ext2_icount_t hint,
 857                                      ext2_icount_t *ret)
 858 {
 859         unsigned int            threshold;
 860         unsigned int            save_type;
 861         ext2_ino_t              num_dirs;
 862         errcode_t               retval;
 863         char                    *tdb_dir;
 864         int                     enable;
 865
 866         *ret = 0;
 867
 868         profile_get_string(ctx->profile, "scratch_files", "directory", 0, 0,
 869                            &tdb_dir);
 870         profile_get_uint(ctx->profile, "scratch_files",
 871                          "numdirs_threshold", 0, 0, &threshold);
 872         profile_get_boolean(ctx->profile, "scratch_files",
 873                             "icount", 0, 1, &enable);
 874
 875         retval = ext2fs_get_num_dirs(ctx->fs, &num_dirs);
 876         if (retval)
 877                 num_dirs = 1024;        /* Guess */
 878
 879         if (enable && tdb_dir && !access(tdb_dir, W_OK) &&
 880             (!threshold || num_dirs > threshold)) {
 881                 retval = ext2fs_create_icount_tdb(ctx->fs, tdb_dir,
 882                                                   flags, ret);
 883                 if (retval == 0)
 884                         return 0;
 885         }
 886         e2fsck_set_bitmap_type(ctx->fs, EXT2FS_BMAP64_RBTREE, icount_name,
 887                                &save_type);
 888         if (ctx->options & E2F_OPT_ICOUNT_FULLMAP)
 889                 flags |= EXT2_ICOUNT_OPT_FULLMAP;
 890         retval = ext2fs_create_icount2(ctx->fs, flags, 0, hint, ret);
 891         ctx->fs->default_bitmap_type = save_type;
 892         return retval;
 893 }
 894
 895 static errcode_t recheck_bad_inode_checksum(ext2_filsys fs, ext2_ino_t ino,
 896                                             e2fsck_t ctx,
 897                                             struct problem_context *pctx)
 898 {
 899         errcode_t retval;
 900         struct ext2_inode_large inode;
 901
 902         /*
 903          * Reread inode.  If we don't see checksum error, then this inode
 904          * has been fixed elsewhere.
 905          */
 906         ctx->stashed_ino = 0;
 907         retval = ext2fs_read_inode_full(fs, ino, (struct ext2_inode *)&inode,
 908                                         sizeof(inode));
 909         if (retval && retval != EXT2_ET_INODE_CSUM_INVALID)
 910                 return retval;
 911         if (!retval)
 912                 return 0;
 913
 914         /*
 915          * Checksum still doesn't match.  That implies that the inode passes
 916          * all the sanity checks, so maybe the checksum is simply corrupt.
 917          * See if the user will go for fixing that.
 918          */
 919         if (!fix_problem(ctx, PR_1_INODE_ONLY_CSUM_INVALID, pctx))
 920                 return 0;
 921
 922         retval = ext2fs_write_inode_full(fs, ino, (struct ext2_inode *)&inode,
 923                                          sizeof(inode));
 924         return retval;
 925 }
 926
 927 int e2fsck_pass1_delete_attr(e2fsck_t ctx, struct ext2_inode_large *inode,
 928                              struct problem_context *pctx, int needed_size)
 929 {
 930         struct ext2_ext_attr_header *header;
 931         struct ext2_ext_attr_entry *entry_ino, *entry_blk = NULL, *entry;
 932         char *start, name[4096], block_buf[4096];
 933         int len, index = EXT2_ATTR_INDEX_USER, entry_size, ea_size;
 934         int in_inode = 1, error;
 935         unsigned int freed_bytes = inode->i_extra_isize;
 936
 937         entry_ino = &IHDR(inode)->h_first_entry[0];
 938         start = (char *)entry_ino;
 939
 940         if (inode->i_file_acl) {
 941                 error = ext2fs_read_ext_attr(ctx->fs, inode->i_file_acl,
 942                                              block_buf);
 943                 /* We have already checked this block, shouldn't happen */
 944                 if (error) {
 945                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, pctx);
 946                         return 0;
 947                 }
 948                 header = BHDR(block_buf);
 949                 if (header->h_magic != EXT2_EXT_ATTR_MAGIC) {
 950                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, pctx);
 951                         return 0;
 952                 }
 953
 954                 entry_blk = (struct ext2_ext_attr_entry *)(header+1);
 955         }
 956         entry = entry_ino;
 957         len = sizeof(entry->e_name);
 958         entry_size = ext2fs_attr_get_next_attr(entry, index, name, len, 1);
 959
 960         while (freed_bytes < needed_size) {
 961                 if (entry_size && name[0] != '\0') {
 962                         pctx->str = name;
 963                         if (fix_problem(ctx, PR_1_EISIZE_DELETE_EA, pctx)) {
 964                                 ea_size = EXT2_EXT_ATTR_LEN(entry->e_name_len) +
 965                                           EXT2_EXT_ATTR_SIZE(entry->e_value_size);
 966                                 error = ext2fs_attr_set(ctx->fs, pctx->ino,
 967                                                         (struct ext2_inode *)inode,
 968                                                         index, name, 0, 0, 0);
 969                                 if (!error)
 970                                         freed_bytes += ea_size;
 971                         }
 972                 }
 973                 len = sizeof(entry->e_name);
 974                 entry_size = ext2fs_attr_get_next_attr(entry, index,name,len,0);
 975                 entry = EXT2_EXT_ATTR_NEXT(entry);
 976                 if (EXT2_EXT_IS_LAST_ENTRY(entry)) {
 977                         if (in_inode) {
 978                                 entry = entry_blk;
 979                                 len = sizeof(entry->e_name);
 980                                 entry_size = ext2fs_attr_get_next_attr(entry,
 981                                                         index, name, len, 1);
 982                                 in_inode = 0;
 983                         } else {
 984                                 index += 1;
 985                                 in_inode = 1;
 986                                 if (!entry && index < EXT2_ATTR_INDEX_MAX)
 987                                         entry = (struct ext2_ext_attr_entry *)start;
 988                                 else
 989                                         return freed_bytes;
 990                         }
 991                 }
 992         }
 993
 994         return freed_bytes;
 995 }
 996
 997 int e2fsck_pass1_expand_eisize(e2fsck_t ctx, struct ext2_inode_large *inode,
 998                                struct problem_context *pctx)
 999 {
1000         int needed_size = 0, retval, ret = EXT2_EXPAND_EISIZE_UNSAFE;
1001         static int message;
1002
1003 retry:
1004         retval = ext2fs_expand_extra_isize(ctx->fs, pctx->ino, inode,
1005                                            ctx->want_extra_isize, &ret,
1006                                            &needed_size);
1007         if (ret & EXT2_EXPAND_EISIZE_NEW_BLOCK)
1008                 goto mark_expand_eisize_map;
1009         if (!retval) {
1010                 e2fsck_write_inode_full(ctx, pctx->ino,
1011                                         (struct ext2_inode *)inode,
1012                                         EXT2_INODE_SIZE(ctx->fs->super),
1013                                         "pass1");
1014                 return 0;
1015         }
1016
1017         if (ret & EXT2_EXPAND_EISIZE_NOSPC) {
1018                 if (ctx->options & (E2F_OPT_PREEN | E2F_OPT_YES)) {
1019                         fix_problem(ctx, PR_1_EA_BLK_NOSPC, pctx);
1020                         ctx->flags |= E2F_FLAG_ABORT;
1021                         return -1;
1022                 }
1023
1024                 if (!message) {
1025                         pctx->num = ctx->fs->super->s_min_extra_isize;
1026                         fix_problem(ctx, PR_1_EXPAND_EISIZE_WARNING, pctx);
1027                         message = 1;
1028                 }
1029 delete_EA:
1030                 retval = e2fsck_pass1_delete_attr(ctx, inode, pctx,
1031                                                   needed_size);
1032                 if (retval >= ctx->want_extra_isize)
1033                         goto retry;
1034
1035                 needed_size -= retval;
1036
1037                 /*
1038                  * We loop here until either the user deletes EA(s) or
1039                  * EXTRA_ISIZE feature is disabled.
1040                  */
1041                 if (fix_problem(ctx, PR_1_CLEAR_EXTRA_ISIZE, pctx)) {
1042                         ctx->fs->super->s_feature_ro_compat &=
1043                                         ~EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE;
1044                         ext2fs_mark_super_dirty(ctx->fs);
1045                 } else {
1046                         goto delete_EA;
1047                 }
1048                 ctx->fs_unexpanded_inodes++;
1049
1050                 /* No EA was deleted, inode cannot be expanded */
1051                 return -1;
1052         }
1053
1054 mark_expand_eisize_map:
1055         if (!ctx->expand_eisize_map) {
1056                 pctx->errcode = ext2fs_allocate_inode_bitmap(ctx->fs,
1057                                          _("expand extrz isize map"),
1058                                          &ctx->expand_eisize_map);
1059                 if (pctx->errcode) {
1060                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR,
1061                                     pctx);
1062                         exit(1);
1063                 }
1064         }
1065
1066         /* Add this inode to the expand_eisize_map */
1067         ext2fs_mark_inode_bitmap2(ctx->expand_eisize_map, pctx->ino);
1068         return 0;
1069 }
1070
1071 static void reserve_block_for_root_repair(e2fsck_t ctx)
1072 {
1073         blk64_t         blk = 0;
1074         errcode_t       err;
1075         ext2_filsys     fs = ctx->fs;
1076
1077         ctx->root_repair_block = 0;
1078         if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO))
1079                 return;
1080
1081         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
1082         if (err)
1083                 return;
1084         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
1085         ctx->root_repair_block = blk;
1086 }
1087
1088 static void reserve_block_for_lnf_repair(e2fsck_t ctx)
1089 {
1090         blk64_t         blk = 0;
1091         errcode_t       err;
1092         ext2_filsys     fs = ctx->fs;
1093         static const char name[] = "lost+found";
1094         ext2_ino_t      ino;
1095
1096         ctx->lnf_repair_block = 0;
1097         if (!ext2fs_lookup(fs, EXT2_ROOT_INO, name, sizeof(name)-1, 0, &ino))
1098                 return;
1099
1100         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
1101         if (err)
1102                 return;
1103         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
1104         ctx->lnf_repair_block = blk;
1105 }
1106
1107 static errcode_t get_inline_data_ea_size(ext2_filsys fs, ext2_ino_t ino,
1108                                          size_t *sz)
1109 {
1110         void *p;
1111         struct ext2_xattr_handle *handle;
1112         errcode_t retval;
1113
1114         retval = ext2fs_xattrs_open(fs, ino, &handle);
1115         if (retval)
1116                 return retval;
1117
1118         retval = ext2fs_xattrs_read(handle);
1119         if (retval)
1120                 goto err;
1121
1122         retval = ext2fs_xattr_get(handle, "system.data", &p, sz);
1123         if (retval)
1124                 goto err;
1125         ext2fs_free_mem(&p);
1126 err:
1127         (void) ext2fs_xattrs_close(&handle);
1128         return retval;
1129 }
1130
1131 static void finish_processing_inode(e2fsck_t ctx, ext2_ino_t ino,
1132                                     struct problem_context *pctx,
1133                                     int failed_csum)
1134 {
1135         if (!failed_csum)
1136                 return;
1137
1138         /*
1139          * If the inode failed the checksum and the user didn't
1140          * clear the inode, test the checksum again -- if it still
1141          * fails, ask the user if the checksum should be corrected.
1142          */
1143         pctx->errcode = recheck_bad_inode_checksum(ctx->fs, ino, ctx, pctx);
1144         if (pctx->errcode)
1145                 ctx->flags |= E2F_FLAG_ABORT;
1146 }
1147 #define FINISH_INODE_LOOP(ctx, ino, pctx, failed_csum) \
1148         do { \
1149                 finish_processing_inode((ctx), (ino), (pctx), (failed_csum)); \
1150                 if ((ctx)->flags & E2F_FLAG_ABORT) \
1151                         return; \
1152         } while (0)
1153
1154 static int could_be_block_map(ext2_filsys fs, struct ext2_inode *inode)
1155 {
1156         __u32 x;
1157         int i;
1158
1159         for (i = 0; i < EXT2_N_BLOCKS; i++) {
1160                 x = inode->i_block[i];
1161 #ifdef WORDS_BIGENDIAN
1162                 x = ext2fs_swab32(x);
1163 #endif
1164                 if (x >= ext2fs_blocks_count(fs->super))
1165                         return 0;
1166         }
1167
1168         return 1;
1169 }
1170
1171 /*
1172  * Figure out what to do with an inode that has both extents and inline data
1173  * inode flags set.  Returns -1 if we decide to erase the inode, 0 otherwise.
1174  */
1175 static int fix_inline_data_extents_file(e2fsck_t ctx,
1176                                         ext2_ino_t ino,
1177                                         struct ext2_inode *inode,
1178                                         int inode_size,
1179                                         struct problem_context *pctx)
1180 {
1181         size_t max_inline_ea_size;
1182         ext2_filsys fs = ctx->fs;
1183         int dirty = 0;
1184
1185         /* Both feature flags not set?  Just run the regular checks */
1186         if (!ext2fs_has_feature_extents(fs->super) &&
1187             !ext2fs_has_feature_inline_data(fs->super))
1188                 return 0;
1189
1190         /* Clear both flags if it's a special file */
1191         if (LINUX_S_ISCHR(inode->i_mode) ||
1192             LINUX_S_ISBLK(inode->i_mode) ||
1193             LINUX_S_ISFIFO(inode->i_mode) ||
1194             LINUX_S_ISSOCK(inode->i_mode)) {
1195                 check_extents_inlinedata(ctx, pctx);
1196                 return 0;
1197         }
1198
1199         /* If it looks like an extent tree, try to clear inlinedata */
1200         if (ext2fs_extent_header_verify(inode->i_block,
1201                                  sizeof(inode->i_block)) == 0 &&
1202             fix_problem(ctx, PR_1_CLEAR_INLINE_DATA_FOR_EXTENT, pctx)) {
1203                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1204                 dirty = 1;
1205                 goto out;
1206         }
1207
1208         /* If it looks short enough to be inline data, try to clear extents */
1209         if (inode_size > EXT2_GOOD_OLD_INODE_SIZE)
1210                 max_inline_ea_size = inode_size -
1211                                      (EXT2_GOOD_OLD_INODE_SIZE +
1212                                       ((struct ext2_inode_large *)inode)->i_extra_isize);
1213         else
1214                 max_inline_ea_size = 0;
1215         if (EXT2_I_SIZE(inode) <
1216             EXT4_MIN_INLINE_DATA_SIZE + max_inline_ea_size &&
1217             fix_problem(ctx, PR_1_CLEAR_EXTENT_FOR_INLINE_DATA, pctx)) {
1218                 inode->i_flags &= ~EXT4_EXTENTS_FL;
1219                 dirty = 1;
1220                 goto out;
1221         }
1222
1223         /*
1224          * Too big for inline data, but no evidence of extent tree -
1225          * maybe it's a block map file?  If the mappings all look valid?
1226          */
1227         if (could_be_block_map(fs, inode) &&
1228             fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_FLAGS, pctx)) {
1229 #ifdef WORDS_BIGENDIAN
1230                 int i;
1231
1232                 for (i = 0; i < EXT2_N_BLOCKS; i++)
1233                         inode->i_block[i] = ext2fs_swab32(inode->i_block[i]);
1234 #endif
1235
1236                 inode->i_flags &= ~(EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL);
1237                 dirty = 1;
1238                 goto out;
1239         }
1240
1241         /* Oh well, just clear the busted inode. */
1242         if (fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_INODE, pctx)) {
1243                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1244                 return -1;
1245         }
1246
1247 out:
1248         if (dirty)
1249                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1250
1251         return 0;
1252 }
1253
1254 static void pass1_readahead(e2fsck_t ctx, dgrp_t *group, ext2_ino_t *next_ino)
1255 {
1256         ext2_ino_t inodes_in_group = 0, inodes_per_block, inodes_per_buffer;
1257         dgrp_t start = *group, grp;
1258         blk64_t blocks_to_read = 0;
1259         errcode_t err = EXT2_ET_INVALID_ARGUMENT;
1260
1261         if (ctx->readahead_kb == 0)
1262                 goto out;
1263
1264         /* Keep iterating groups until we have enough to readahead */
1265         inodes_per_block = EXT2_INODES_PER_BLOCK(ctx->fs->super);
1266         for (grp = start; grp < ctx->fs->group_desc_count; grp++) {
1267                 if (ext2fs_bg_flags_test(ctx->fs, grp, EXT2_BG_INODE_UNINIT))
1268                         continue;
1269                 inodes_in_group = ctx->fs->super->s_inodes_per_group -
1270                                         ext2fs_bg_itable_unused(ctx->fs, grp);
1271                 blocks_to_read += (inodes_in_group + inodes_per_block - 1) /
1272                                         inodes_per_block;
1273                 if (blocks_to_read * ctx->fs->blocksize >
1274                     ctx->readahead_kb * 1024)
1275                         break;
1276         }
1277
1278         err = e2fsck_readahead(ctx->fs, E2FSCK_READA_ITABLE, start,
1279                                grp - start + 1);
1280         if (err == EAGAIN) {
1281                 ctx->readahead_kb /= 2;
1282                 err = 0;
1283         }
1284
1285 out:
1286         if (err) {
1287                 /* Error; disable itable readahead */
1288                 *group = ctx->fs->group_desc_count;
1289                 *next_ino = ctx->fs->super->s_inodes_count;
1290         } else {
1291                 /*
1292                  * Don't do more readahead until we've reached the first inode
1293                  * of the last inode scan buffer block for the last group.
1294                  */
1295                 *group = grp + 1;
1296                 inodes_per_buffer = (ctx->inode_buffer_blocks ?
1297                                      ctx->inode_buffer_blocks :
1298                                      EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS) *
1299                                     ctx->fs->blocksize /
1300                                     EXT2_INODE_SIZE(ctx->fs->super);
1301                 inodes_in_group--;
1302                 *next_ino = inodes_in_group -
1303                             (inodes_in_group % inodes_per_buffer) + 1 +
1304                             (grp * ctx->fs->super->s_inodes_per_group);
1305         }
1306 }
1307
1308 /*
1309  * Check if the passed ino is one of the used superblock quota inodes.
1310  *
1311  * Before the quota inodes were journaled, older superblock quota inodes
1312  * were just regular files in the filesystem and not reserved inodes.  This
1313  * checks if the passed ino is one of the s_*_quota_inum superblock fields,
1314  * which may not always be the same as the EXT4_*_QUOTA_INO fields.
1315  */
1316 static int quota_inum_is_super(struct ext2_super_block *sb, ext2_ino_t ino)
1317 {
1318         enum quota_type qtype;
1319
1320         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1321                 if (*quota_sb_inump(sb, qtype) == ino)
1322                         return 1;
1323
1324         return 0;
1325 }
1326
1327 /*
1328  * Check if the passed ino is one of the reserved quota inodes.
1329  * This checks if the inode number is one of the reserved EXT4_*_QUOTA_INO
1330  * inodes.  These inodes may or may not be in use by the quota feature.
1331  */
1332 static int quota_inum_is_reserved(ext2_filsys fs, ext2_ino_t ino)
1333 {
1334         enum quota_type qtype;
1335
1336         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1337                 if (quota_type2inum(qtype, fs->super) == ino)
1338                         return 1;
1339
1340         return 0;
1341 }
1342
1343 void e2fsck_pass1(e2fsck_t ctx)
1344 {
1345         int     i;
1346         __u64   max_sizes;
1347         ext2_filsys fs = ctx->fs;
1348         ext2_ino_t      ino = 0;
1349         struct ext2_inode *inode = NULL;
1350         ext2_inode_scan scan = NULL;
1351         char            *block_buf = NULL;
1352 #ifdef RESOURCE_TRACK
1353         struct resource_track   rtrack;
1354 #endif
1355         unsigned char   frag, fsize;
1356         struct          problem_context pctx;
1357         struct          scan_callback_struct scan_struct;
1358         struct ext2_super_block *sb = ctx->fs->super;
1359         const char      *old_op;
1360         int             imagic_fs, extent_fs, inlinedata_fs;
1361         int             low_dtime_check = 1;
1362         unsigned int    inode_size = EXT2_INODE_SIZE(fs->super);
1363         unsigned int    bufsize;
1364         int             failed_csum = 0;
1365         ext2_ino_t      ino_threshold = 0;
1366         dgrp_t          ra_group = 0;
1367         struct ea_quota ea_ibody_quota;
1368         int             inode_exp = 0;
1369
1370         init_resource_track(&rtrack, ctx->fs->io);
1371         clear_problem_context(&pctx);
1372
1373         /* If we can do readahead, figure out how many groups to pull in. */
1374         if (!e2fsck_can_readahead(ctx->fs))
1375                 ctx->readahead_kb = 0;
1376         else if (ctx->readahead_kb == ~0ULL)
1377                 ctx->readahead_kb = e2fsck_guess_readahead(ctx->fs);
1378         pass1_readahead(ctx, &ra_group, &ino_threshold);
1379
1380         if (!(ctx->options & E2F_OPT_PREEN))
1381                 fix_problem(ctx, PR_1_PASS_HEADER, &pctx);
1382
1383         if (ext2fs_has_feature_dir_index(fs->super) &&
1384             !(ctx->options & E2F_OPT_NO)) {
1385                 if (ext2fs_u32_list_create(&ctx->dirs_to_hash, 50))
1386                         ctx->dirs_to_hash = 0;
1387         }
1388
1389 #ifdef MTRACE
1390         mtrace_print("Pass 1");
1391 #endif
1392
1393 #define EXT2_BPP(bits) (1ULL << ((bits) - 2))
1394
1395         for (i = EXT2_MIN_BLOCK_LOG_SIZE; i <= EXT2_MAX_BLOCK_LOG_SIZE; i++) {
1396                 max_sizes = EXT2_NDIR_BLOCKS + EXT2_BPP(i);
1397                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i);
1398                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i) * EXT2_BPP(i);
1399                 max_sizes = (max_sizes * (1UL << i));
1400                 ext2_max_sizes[i - EXT2_MIN_BLOCK_LOG_SIZE] = max_sizes;
1401         }
1402 #undef EXT2_BPP
1403
1404         imagic_fs = ext2fs_has_feature_imagic_inodes(sb);
1405         extent_fs = ext2fs_has_feature_extents(sb);
1406         inlinedata_fs = ext2fs_has_feature_inline_data(sb);
1407
1408         /*
1409          * Allocate bitmaps structures
1410          */
1411         pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("in-use inode map"),
1412                                                     EXT2FS_BMAP64_RBTREE,
1413                                                     "inode_used_map",
1414                                                     &ctx->inode_used_map);
1415         if (pctx.errcode) {
1416                 pctx.num = 1;
1417                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1418                 ctx->flags |= E2F_FLAG_ABORT;
1419                 return;
1420         }
1421         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1422                         _("directory inode map"),
1423                         EXT2FS_BMAP64_AUTODIR,
1424                         "inode_dir_map", &ctx->inode_dir_map);
1425         if (pctx.errcode) {
1426                 pctx.num = 2;
1427                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1428                 ctx->flags |= E2F_FLAG_ABORT;
1429                 return;
1430         }
1431         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1432                         _("regular file inode map"), EXT2FS_BMAP64_RBTREE,
1433                         "inode_reg_map", &ctx->inode_reg_map);
1434         if (pctx.errcode) {
1435                 pctx.num = 6;
1436                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1437                 ctx->flags |= E2F_FLAG_ABORT;
1438                 return;
1439         }
1440         pctx.errcode = e2fsck_allocate_subcluster_bitmap(fs,
1441                         _("in-use block map"), EXT2FS_BMAP64_RBTREE,
1442                         "block_found_map", &ctx->block_found_map);
1443         if (pctx.errcode) {
1444                 pctx.num = 1;
1445                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1446                 ctx->flags |= E2F_FLAG_ABORT;
1447                 return;
1448         }
1449         pctx.errcode = e2fsck_allocate_block_bitmap(fs,
1450                         _("metadata block map"), EXT2FS_BMAP64_RBTREE,
1451                         "block_metadata_map", &ctx->block_metadata_map);
1452         if (pctx.errcode) {
1453                 pctx.num = 1;
1454                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1455                 ctx->flags |= E2F_FLAG_ABORT;
1456                 return;
1457         }
1458         pctx.errcode = e2fsck_setup_icount(ctx, "inode_link_info", 0, NULL,
1459                                            &ctx->inode_link_info);
1460         if (pctx.errcode) {
1461                 fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
1462                 ctx->flags |= E2F_FLAG_ABORT;
1463                 return;
1464         }
1465         bufsize = inode_size;
1466         if (bufsize < sizeof(struct ext2_inode_large))
1467                 bufsize = sizeof(struct ext2_inode_large);
1468         inode = (struct ext2_inode *)
1469                 e2fsck_allocate_memory(ctx, bufsize, "scratch inode");
1470
1471         inodes_to_process = (struct process_inode_block *)
1472                 e2fsck_allocate_memory(ctx,
1473                                        (ctx->process_inode_size *
1474                                         sizeof(struct process_inode_block)),
1475                                        "array of inodes to process");
1476         process_inode_count = 0;
1477
1478         pctx.errcode = ext2fs_init_dblist(fs, 0);
1479         if (pctx.errcode) {
1480                 fix_problem(ctx, PR_1_ALLOCATE_DBCOUNT, &pctx);
1481                 ctx->flags |= E2F_FLAG_ABORT;
1482                 goto endit;
1483         }
1484
1485         /*
1486          * If the last orphan field is set, clear it, since the pass1
1487          * processing will automatically find and clear the orphans.
1488          * In the future, we may want to try using the last_orphan
1489          * linked list ourselves, but for now, we clear it so that the
1490          * ext3 mount code won't get confused.
1491          */
1492         if (!(ctx->options & E2F_OPT_READONLY)) {
1493                 if (fs->super->s_last_orphan) {
1494                         fs->super->s_last_orphan = 0;
1495                         ext2fs_mark_super_dirty(fs);
1496                 }
1497         }
1498
1499         mark_table_blocks(ctx);
1500         pctx.errcode = ext2fs_convert_subcluster_bitmap(fs,
1501                                                 &ctx->block_found_map);
1502         if (pctx.errcode) {
1503                 fix_problem(ctx, PR_1_CONVERT_SUBCLUSTER, &pctx);
1504                 ctx->flags |= E2F_FLAG_ABORT;
1505                 goto endit;
1506         }
1507         block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3,
1508                                                     "block interate buffer");
1509         if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
1510                 e2fsck_use_inode_shortcuts(ctx, 1);
1511         e2fsck_intercept_block_allocations(ctx);
1512         old_op = ehandler_operation(_("opening inode scan"));
1513         pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks,
1514                                               &scan);
1515         ehandler_operation(old_op);
1516         if (pctx.errcode) {
1517                 fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1518                 ctx->flags |= E2F_FLAG_ABORT;
1519                 goto endit;
1520         }
1521         ext2fs_inode_scan_flags(scan, EXT2_SF_SKIP_MISSING_ITABLE |
1522                                       EXT2_SF_WARN_GARBAGE_INODES, 0);
1523         ctx->stashed_inode = inode;
1524         scan_struct.ctx = ctx;
1525         scan_struct.block_buf = block_buf;
1526         ext2fs_set_inode_callback(scan, scan_callback, &scan_struct);
1527         if (ctx->progress && ((ctx->progress)(ctx, 1, 0,
1528                                               ctx->fs->group_desc_count)))
1529                 goto endit;
1530         if ((fs->super->s_wtime < fs->super->s_inodes_count) ||
1531             (fs->super->s_mtime < fs->super->s_inodes_count) ||
1532             (fs->super->s_mkfs_time &&
1533              fs->super->s_mkfs_time < fs->super->s_inodes_count))
1534                 low_dtime_check = 0;
1535
1536         if (ext2fs_has_feature_mmp(fs->super) &&
1537             fs->super->s_mmp_block > fs->super->s_first_data_block &&
1538             fs->super->s_mmp_block < ext2fs_blocks_count(fs->super))
1539                 ext2fs_mark_block_bitmap2(ctx->block_found_map,
1540                                           fs->super->s_mmp_block);
1541
1542         /* Set up ctx->lost_and_found if possible */
1543         (void) e2fsck_get_lost_and_found(ctx, 0);
1544
1545         while (1) {
1546                 if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
1547                         if (e2fsck_mmp_update(fs))
1548                                 fatal_error(ctx, 0);
1549                 }
1550                 old_op = ehandler_operation(_("getting next inode from scan"));
1551                 pctx.errcode = ext2fs_get_next_inode_full(scan, &ino,
1552                                                           inode, inode_size);
1553                 if (ino > ino_threshold)
1554                         pass1_readahead(ctx, &ra_group, &ino_threshold);
1555                 ehandler_operation(old_op);
1556                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1557                         goto endit;
1558                 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) {
1559                         /*
1560                          * If badblocks says badblocks is bad, offer to clear
1561                          * the list, update the in-core bb list, and restart
1562                          * the inode scan.
1563                          */
1564                         if (ino == EXT2_BAD_INO &&
1565                             fix_problem(ctx, PR_1_BADBLOCKS_IN_BADBLOCKS,
1566                                         &pctx)) {
1567                                 errcode_t err;
1568
1569                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1570                                 ext2fs_badblocks_list_free(ctx->fs->badblocks);
1571                                 ctx->fs->badblocks = NULL;
1572                                 err = ext2fs_read_bb_inode(ctx->fs,
1573                                                         &ctx->fs->badblocks);
1574                                 if (err) {
1575                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1576                                                     &pctx);
1577                                         ctx->flags |= E2F_FLAG_ABORT;
1578                                         goto endit;
1579                                 }
1580                                 err = ext2fs_inode_scan_goto_blockgroup(scan,
1581                                                                         0);
1582                                 if (err) {
1583                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1584                                                     &pctx);
1585                                         ctx->flags |= E2F_FLAG_ABORT;
1586                                         goto endit;
1587                                 }
1588                                 continue;
1589                         }
1590                         if (!ctx->inode_bb_map)
1591                                 alloc_bb_map(ctx);
1592                         ext2fs_mark_inode_bitmap2(ctx->inode_bb_map, ino);
1593                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1594                         continue;
1595                 }
1596                 if (pctx.errcode &&
1597                     pctx.errcode != EXT2_ET_INODE_CSUM_INVALID &&
1598                     pctx.errcode != EXT2_ET_INODE_IS_GARBAGE) {
1599                         fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1600                         ctx->flags |= E2F_FLAG_ABORT;
1601                         goto endit;
1602                 }
1603                 if (!ino)
1604                         break;
1605                 pctx.ino = ino;
1606                 pctx.inode = inode;
1607                 ctx->stashed_ino = ino;
1608
1609                 /* Clear trashed inode? */
1610                 if (pctx.errcode == EXT2_ET_INODE_IS_GARBAGE &&
1611                     inode->i_links_count > 0 &&
1612                     fix_problem(ctx, PR_1_INODE_IS_GARBAGE, &pctx)) {
1613                         pctx.errcode = 0;
1614                         e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1615                 }
1616                 failed_csum = pctx.errcode != 0;
1617
1618                 /*
1619                  * Check for inodes who might have been part of the
1620                  * orphaned list linked list.  They should have gotten
1621                  * dealt with by now, unless the list had somehow been
1622                  * corrupted.
1623                  *
1624                  * FIXME: In the future, inodes which are still in use
1625                  * (and which are therefore) pending truncation should
1626                  * be handled specially.  Right now we just clear the
1627                  * dtime field, and the normal e2fsck handling of
1628                  * inodes where i_size and the inode blocks are
1629                  * inconsistent is to fix i_size, instead of releasing
1630                  * the extra blocks.  This won't catch the inodes that
1631                  * was at the end of the orphan list, but it's better
1632                  * than nothing.  The right answer is that there
1633                  * shouldn't be any bugs in the orphan list handling.  :-)
1634                  */
1635                 if (inode->i_dtime && low_dtime_check &&
1636                     inode->i_dtime < ctx->fs->super->s_inodes_count) {
1637                         if (fix_problem(ctx, PR_1_LOW_DTIME, &pctx)) {
1638                                 inode->i_dtime = inode->i_links_count ?
1639                                         0 : ctx->now;
1640                                 e2fsck_write_inode(ctx, ino, inode,
1641                                                    "pass1");
1642                                 failed_csum = 0;
1643                         }
1644                 }
1645
1646                 if (inode->i_links_count) {
1647                         pctx.errcode = ext2fs_icount_store(ctx->inode_link_info,
1648                                            ino, inode->i_links_count);
1649                         if (pctx.errcode) {
1650                                 pctx.num = inode->i_links_count;
1651                                 fix_problem(ctx, PR_1_ICOUNT_STORE, &pctx);
1652                                 ctx->flags |= E2F_FLAG_ABORT;
1653                                 goto endit;
1654                         }
1655                 } else if ((ino >= EXT2_FIRST_INODE(fs->super)) &&
1656                            !quota_inum_is_reserved(fs, ino)) {
1657                         if (!inode->i_dtime && inode->i_mode) {
1658                                 if (fix_problem(ctx,
1659                                             PR_1_ZERO_DTIME, &pctx)) {
1660                                         inode->i_dtime = ctx->now;
1661                                         e2fsck_write_inode(ctx, ino, inode,
1662                                                            "pass1");
1663                                         failed_csum = 0;
1664                                 }
1665                         }
1666                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1667                         continue;
1668                 }
1669
1670                 /* Conflicting inlinedata/extents inode flags? */
1671                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
1672                     (inode->i_flags & EXT4_EXTENTS_FL)) {
1673                         int res = fix_inline_data_extents_file(ctx, ino, inode,
1674                                                                inode_size,
1675                                                                &pctx);
1676                         if (res < 0) {
1677                                 /* skip FINISH_INODE_LOOP */
1678                                 continue;
1679                         }
1680                 }
1681
1682                 /* Test for incorrect inline_data flags settings. */
1683                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && !inlinedata_fs &&
1684                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1685                         size_t size = 0;
1686
1687                         pctx.errcode = ext2fs_inline_data_size(fs, ino, &size);
1688                         if (!pctx.errcode && size &&
1689                             fix_problem(ctx, PR_1_INLINE_DATA_FEATURE, &pctx)) {
1690                                 ext2fs_set_feature_inline_data(sb);
1691                                 ext2fs_mark_super_dirty(fs);
1692                                 inlinedata_fs = 1;
1693                         } else if (fix_problem(ctx, PR_1_INLINE_DATA_SET, &pctx)) {
1694                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1695                                 /* skip FINISH_INODE_LOOP */
1696                                 continue;
1697                         }
1698                 }
1699
1700                 /* Test for inline data flag but no attr */
1701                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && inlinedata_fs &&
1702                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1703                         size_t size = 0;
1704                         errcode_t err;
1705                         int flags;
1706
1707                         flags = fs->flags;
1708                         if (failed_csum)
1709                                 fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1710                         err = get_inline_data_ea_size(fs, ino, &size);
1711                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1712                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1713
1714                         switch (err) {
1715                         case 0:
1716                                 /* Everything is awesome... */
1717                                 break;
1718                         case EXT2_ET_BAD_EA_BLOCK_NUM:
1719                         case EXT2_ET_BAD_EA_HASH:
1720                         case EXT2_ET_BAD_EA_HEADER:
1721                         case EXT2_ET_EA_BAD_NAME_LEN:
1722                         case EXT2_ET_EA_BAD_VALUE_SIZE:
1723                         case EXT2_ET_EA_KEY_NOT_FOUND:
1724                         case EXT2_ET_EA_NO_SPACE:
1725                         case EXT2_ET_MISSING_EA_FEATURE:
1726                         case EXT2_ET_INLINE_DATA_CANT_ITERATE:
1727                         case EXT2_ET_INLINE_DATA_NO_BLOCK:
1728                         case EXT2_ET_INLINE_DATA_NO_SPACE:
1729                         case EXT2_ET_NO_INLINE_DATA:
1730                         case EXT2_ET_EXT_ATTR_CSUM_INVALID:
1731                         case EXT2_ET_EA_BAD_VALUE_OFFSET:
1732                         case EXT2_ET_EA_INODE_CORRUPTED:
1733                                 /* broken EA or no system.data EA; truncate */
1734                                 if (fix_problem(ctx, PR_1_INLINE_DATA_NO_ATTR,
1735                                                 &pctx)) {
1736                                         err = ext2fs_inode_size_set(fs, inode, 0);
1737                                         if (err) {
1738                                                 pctx.errcode = err;
1739                                                 ctx->flags |= E2F_FLAG_ABORT;
1740                                                 goto endit;
1741                                         }
1742                                         inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1743                                         memset(&inode->i_block, 0,
1744                                                sizeof(inode->i_block));
1745                                         e2fsck_write_inode(ctx, ino, inode,
1746                                                            "pass1");
1747                                         failed_csum = 0;
1748                                 }
1749                                 break;
1750                         default:
1751                                 /* Some other kind of non-xattr error? */
1752                                 pctx.errcode = err;
1753                                 ctx->flags |= E2F_FLAG_ABORT;
1754                                 goto endit;
1755                         }
1756                 }
1757
1758                 /*
1759                  * Test for incorrect extent flag settings.
1760                  *
1761                  * On big-endian machines we must be careful:
1762                  * When the inode is read, the i_block array is not swapped
1763                  * if the extent flag is set.  Therefore if we are testing
1764                  * for or fixing a wrongly-set flag, we must potentially
1765                  * (un)swap before testing, or after fixing.
1766                  */
1767
1768                 /*
1769                  * In this case the extents flag was set when read, so
1770                  * extent_header_verify is ok.  If the inode is cleared,
1771                  * no need to swap... so no extra swapping here.
1772                  */
1773                 if ((inode->i_flags & EXT4_EXTENTS_FL) && !extent_fs &&
1774                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1775                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO))) {
1776                         if ((ext2fs_extent_header_verify(inode->i_block,
1777                                                  sizeof(inode->i_block)) == 0) &&
1778                             fix_problem(ctx, PR_1_EXTENT_FEATURE, &pctx)) {
1779                                 ext2fs_set_feature_extents(sb);
1780                                 ext2fs_mark_super_dirty(fs);
1781                                 extent_fs = 1;
1782                         } else if (fix_problem(ctx, PR_1_EXTENTS_SET, &pctx)) {
1783                         clear_inode:
1784                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1785                                 if (ino == EXT2_BAD_INO)
1786                                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map,
1787                                                                  ino);
1788                                 /* skip FINISH_INODE_LOOP */
1789                                 continue;
1790                         }
1791                 }
1792
1793                 /*
1794                  * For big-endian machines:
1795                  * If the inode didn't have the extents flag set when it
1796                  * was read, then the i_blocks array was swapped.  To test
1797                  * as an extents header, we must swap it back first.
1798                  * IF we then set the extents flag, the entire i_block
1799                  * array must be un/re-swapped to make it proper extents data.
1800                  */
1801                 if (extent_fs && !(inode->i_flags & EXT4_EXTENTS_FL) &&
1802                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1803                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO)) &&
1804                     (LINUX_S_ISREG(inode->i_mode) ||
1805                      LINUX_S_ISDIR(inode->i_mode))) {
1806                         void *ehp;
1807 #ifdef WORDS_BIGENDIAN
1808                         __u32 tmp_block[EXT2_N_BLOCKS];
1809
1810                         for (i = 0; i < EXT2_N_BLOCKS; i++)
1811                                 tmp_block[i] = ext2fs_swab32(inode->i_block[i]);
1812                         ehp = tmp_block;
1813 #else
1814                         ehp = inode->i_block;
1815 #endif
1816                         if ((ext2fs_extent_header_verify(ehp,
1817                                          sizeof(inode->i_block)) == 0)) {
1818                                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
1819                                 if (fix_problem(ctx, PR_1_UNSET_EXTENT_FL,
1820                                                 &pctx)) {
1821                                         inode->i_flags |= EXT4_EXTENTS_FL;
1822 #ifdef WORDS_BIGENDIAN
1823                                         memcpy(inode->i_block, tmp_block,
1824                                                sizeof(inode->i_block));
1825 #endif
1826                                         e2fsck_write_inode(ctx, ino, inode,
1827                                                            "pass1");
1828                                         failed_csum = 0;
1829                                 }
1830                         }
1831                 }
1832
1833                 if (ino == EXT2_BAD_INO) {
1834                         struct process_block_struct pb;
1835
1836                         if ((failed_csum || inode->i_mode || inode->i_uid ||
1837                              inode->i_gid || inode->i_links_count ||
1838                              (inode->i_flags & EXT4_INLINE_DATA_FL) ||
1839                              inode->i_file_acl) &&
1840                             fix_problem(ctx, PR_1_INVALID_BAD_INODE, &pctx)) {
1841                                 memset(inode, 0, sizeof(struct ext2_inode));
1842                                 e2fsck_write_inode(ctx, ino, inode,
1843                                                    "clear bad inode");
1844                                 failed_csum = 0;
1845                         }
1846
1847                         pctx.errcode = ext2fs_copy_bitmap(ctx->block_found_map,
1848                                                           &pb.fs_meta_blocks);
1849                         if (pctx.errcode) {
1850                                 pctx.num = 4;
1851                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1852                                 ctx->flags |= E2F_FLAG_ABORT;
1853                                 goto endit;
1854                         }
1855                         pb.ino = EXT2_BAD_INO;
1856                         pb.num_blocks = pb.last_block = 0;
1857                         pb.last_db_block = -1;
1858                         pb.num_illegal_blocks = 0;
1859                         pb.suppress = 0; pb.clear = 0; pb.is_dir = 0;
1860                         pb.is_reg = 0; pb.fragmented = 0; pb.bbcheck = 0;
1861                         pb.inode = inode;
1862                         pb.pctx = &pctx;
1863                         pb.ctx = ctx;
1864                         pctx.errcode = ext2fs_block_iterate3(fs, ino, 0,
1865                                      block_buf, process_bad_block, &pb);
1866                         ext2fs_free_block_bitmap(pb.fs_meta_blocks);
1867                         if (pctx.errcode) {
1868                                 fix_problem(ctx, PR_1_BLOCK_ITERATE, &pctx);
1869                                 ctx->flags |= E2F_FLAG_ABORT;
1870                                 goto endit;
1871                         }
1872                         if (pb.bbcheck)
1873                                 if (!fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK_PROMPT, &pctx)) {
1874                                 ctx->flags |= E2F_FLAG_ABORT;
1875                                 goto endit;
1876                         }
1877                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1878                         clear_problem_context(&pctx);
1879                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1880                         continue;
1881                 } else if (ino == EXT2_ROOT_INO) {
1882                         /*
1883                          * Make sure the root inode is a directory; if
1884                          * not, offer to clear it.  It will be
1885                          * regenerated in pass #3.
1886                          */
1887                         if (!LINUX_S_ISDIR(inode->i_mode)) {
1888                                 if (fix_problem(ctx, PR_1_ROOT_NO_DIR, &pctx))
1889                                         goto clear_inode;
1890                         }
1891                         /*
1892                          * If dtime is set, offer to clear it.  mke2fs
1893                          * version 0.2b created filesystems with the
1894                          * dtime field set for the root and lost+found
1895                          * directories.  We won't worry about
1896                          * /lost+found, since that can be regenerated
1897                          * easily.  But we will fix the root directory
1898                          * as a special case.
1899                          */
1900                         if (inode->i_dtime && inode->i_links_count) {
1901                                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
1902                                 if (fix_problem(ctx, PR_1_ROOT_DTIME, &pctx)) {
1903                                         inode->i_dtime = 0;
1904                                         e2fsck_write_inode(ctx, ino, inode,
1905                                                            "pass1");
1906                                         failed_csum = 0;
1907                                 }
1908                         }
1909                 } else if (ino == EXT2_JOURNAL_INO) {
1910                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1911                         if (fs->super->s_journal_inum == EXT2_JOURNAL_INO) {
1912                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1913                                     fix_problem(ctx, PR_1_JOURNAL_BAD_MODE,
1914                                                 &pctx)) {
1915                                         inode->i_mode = LINUX_S_IFREG;
1916                                         e2fsck_write_inode(ctx, ino, inode,
1917                                                            "pass1");
1918                                         failed_csum = 0;
1919                                 }
1920                                 check_blocks(ctx, &pctx, block_buf, NULL);
1921                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1922                                 continue;
1923                         }
1924                         if ((inode->i_links_count ||
1925                              inode->i_blocks || inode->i_block[0]) &&
1926                             fix_problem(ctx, PR_1_JOURNAL_INODE_NOT_CLEAR,
1927                                         &pctx)) {
1928                                 memset(inode, 0, inode_size);
1929                                 ext2fs_icount_store(ctx->inode_link_info,
1930                                                     ino, 0);
1931                                 e2fsck_write_inode_full(ctx, ino, inode,
1932                                                         inode_size, "pass1");
1933                                 failed_csum = 0;
1934                         }
1935                 } else if (quota_inum_is_reserved(fs, ino)) {
1936                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1937                         if (ext2fs_has_feature_quota(fs->super) &&
1938                             quota_inum_is_super(fs->super, ino)) {
1939                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1940                                     fix_problem(ctx, PR_1_QUOTA_BAD_MODE,
1941                                                         &pctx)) {
1942                                         inode->i_mode = LINUX_S_IFREG;
1943                                         e2fsck_write_inode(ctx, ino, inode,
1944                                                         "pass1");
1945                                         failed_csum = 0;
1946                                 }
1947                                 check_blocks(ctx, &pctx, block_buf, NULL);
1948                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1949                                 continue;
1950                         }
1951                         if ((inode->i_links_count ||
1952                              inode->i_blocks || inode->i_block[0]) &&
1953                             fix_problem(ctx, PR_1_QUOTA_INODE_NOT_CLEAR,
1954                                         &pctx)) {
1955                                 memset(inode, 0, inode_size);
1956                                 ext2fs_icount_store(ctx->inode_link_info,
1957                                                     ino, 0);
1958                                 e2fsck_write_inode_full(ctx, ino, inode,
1959                                                         inode_size, "pass1");
1960                                 failed_csum = 0;
1961                         }
1962                 } else if (ino < EXT2_FIRST_INODE(fs->super)) {
1963                         problem_t problem = 0;
1964
1965                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1966                         if (ino == EXT2_BOOT_LOADER_INO) {
1967                                 if (LINUX_S_ISDIR(inode->i_mode))
1968                                         problem = PR_1_RESERVED_BAD_MODE;
1969                         } else if (ino == EXT2_RESIZE_INO) {
1970                                 if (inode->i_mode &&
1971                                     !LINUX_S_ISREG(inode->i_mode))
1972                                         problem = PR_1_RESERVED_BAD_MODE;
1973                         } else {
1974                                 if (inode->i_mode != 0)
1975                                         problem = PR_1_RESERVED_BAD_MODE;
1976                         }
1977                         if (problem) {
1978                                 if (fix_problem(ctx, problem, &pctx)) {
1979                                         inode->i_mode = 0;
1980                                         e2fsck_write_inode(ctx, ino, inode,
1981                                                            "pass1");
1982                                         failed_csum = 0;
1983                                 }
1984                         }
1985                         check_blocks(ctx, &pctx, block_buf, NULL);
1986                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1987                         continue;
1988                 }
1989
1990                 if (!inode->i_links_count) {
1991                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1992                         continue;
1993                 }
1994                 /*
1995                  * n.b.  0.3c ext2fs code didn't clear i_links_count for
1996                  * deleted files.  Oops.
1997                  *
1998                  * Since all new ext2 implementations get this right,
1999                  * we now assume that the case of non-zero
2000                  * i_links_count and non-zero dtime means that we
2001                  * should keep the file, not delete it.
2002                  *
2003                  */
2004                 if (inode->i_dtime) {
2005                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2006                         if (fix_problem(ctx, PR_1_SET_DTIME, &pctx)) {
2007                                 inode->i_dtime = 0;
2008                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
2009                                 failed_csum = 0;
2010                         }
2011                 }
2012
2013                 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
2014                 switch (fs->super->s_creator_os) {
2015                     case EXT2_OS_HURD:
2016                         frag = inode->osd2.hurd2.h_i_frag;
2017                         fsize = inode->osd2.hurd2.h_i_fsize;
2018                         break;
2019                     default:
2020                         frag = fsize = 0;
2021                 }
2022
2023                 /* Fixed in pass2, e2fsck_process_bad_inode(). */
2024                 if (inode->i_faddr || frag || fsize ||
2025                     (!ext2fs_has_feature_largedir(fs->super) &&
2026                     (LINUX_S_ISDIR(inode->i_mode) && inode->i_size_high)))
2027                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2028                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
2029                     !ext2fs_has_feature_64bit(fs->super) &&
2030                     inode->osd2.linux2.l_i_file_acl_high != 0)
2031                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2032                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
2033                     !ext2fs_has_feature_huge_file(fs->super) &&
2034                     (inode->osd2.linux2.l_i_blocks_hi != 0))
2035                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2036                 if (inode->i_flags & EXT2_IMAGIC_FL) {
2037                         if (imagic_fs) {
2038                                 if (!ctx->inode_imagic_map)
2039                                         alloc_imagic_map(ctx);
2040                                 ext2fs_mark_inode_bitmap2(ctx->inode_imagic_map,
2041                                                          ino);
2042                         } else {
2043                                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2044                                 if (fix_problem(ctx, PR_1_SET_IMAGIC, &pctx)) {
2045                                         inode->i_flags &= ~EXT2_IMAGIC_FL;
2046                                         e2fsck_write_inode(ctx, ino,
2047                                                            inode, "pass1");
2048                                         failed_csum = 0;
2049                                 }
2050                         }
2051                 }
2052
2053                 check_inode_extra_space(ctx, &pctx, &ea_ibody_quota);
2054                 check_is_really_dir(ctx, &pctx, block_buf);
2055
2056                 /*
2057                  * ext2fs_inode_has_valid_blocks2 does not actually look
2058                  * at i_block[] values, so not endian-sensitive here.
2059                  */
2060                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL) &&
2061                     LINUX_S_ISLNK(inode->i_mode) &&
2062                     !ext2fs_inode_has_valid_blocks2(fs, inode) &&
2063                     fix_problem(ctx, PR_1_FAST_SYMLINK_EXTENT_FL, &pctx)) {
2064                         inode->i_flags &= ~EXT4_EXTENTS_FL;
2065                         e2fsck_write_inode(ctx, ino, inode, "pass1");
2066                         failed_csum = 0;
2067                 }
2068
2069                 if (LINUX_S_ISDIR(inode->i_mode)) {
2070                         ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
2071                         e2fsck_add_dir_info(ctx, ino, 0);
2072                         ctx->fs_directory_count++;
2073                         if (inode->i_flags & EXT4_ENCRYPT_FL)
2074                                 add_encrypted_dir(ctx, ino);
2075                 } else if (LINUX_S_ISREG (inode->i_mode)) {
2076                         ext2fs_mark_inode_bitmap2(ctx->inode_reg_map, ino);
2077                         ctx->fs_regular_count++;
2078                 } else if (LINUX_S_ISCHR (inode->i_mode) &&
2079                            e2fsck_pass1_check_device_inode(fs, inode)) {
2080                         check_extents_inlinedata(ctx, &pctx);
2081                         check_immutable(ctx, &pctx);
2082                         check_size(ctx, &pctx);
2083                         ctx->fs_chardev_count++;
2084                 } else if (LINUX_S_ISBLK (inode->i_mode) &&
2085                            e2fsck_pass1_check_device_inode(fs, inode)) {
2086                         check_extents_inlinedata(ctx, &pctx);
2087                         check_immutable(ctx, &pctx);
2088                         check_size(ctx, &pctx);
2089                         ctx->fs_blockdev_count++;
2090                 } else if (LINUX_S_ISLNK (inode->i_mode) &&
2091                            check_symlink(ctx, &pctx, ino, inode, block_buf)) {
2092                         check_immutable(ctx, &pctx);
2093                         ctx->fs_symlinks_count++;
2094                         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
2095                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
2096                                 continue;
2097                         } else if (ext2fs_is_fast_symlink(inode)) {
2098                                 ctx->fs_fast_symlinks_count++;
2099                                 check_blocks(ctx, &pctx, block_buf,
2100                                              &ea_ibody_quota);
2101                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
2102                                 continue;
2103                         }
2104                 }
2105                 else if (LINUX_S_ISFIFO (inode->i_mode) &&
2106                          e2fsck_pass1_check_device_inode(fs, inode)) {
2107                         check_extents_inlinedata(ctx, &pctx);
2108                         check_immutable(ctx, &pctx);
2109                         check_size(ctx, &pctx);
2110                         ctx->fs_fifo_count++;
2111                 } else if ((LINUX_S_ISSOCK (inode->i_mode)) &&
2112                            e2fsck_pass1_check_device_inode(fs, inode)) {
2113                         check_extents_inlinedata(ctx, &pctx);
2114                         check_immutable(ctx, &pctx);
2115                         check_size(ctx, &pctx);
2116                         ctx->fs_sockets_count++;
2117                 } else {
2118                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2119                 }
2120
2121                 if (EXT4_XTIME_FUTURE(ctx, sb, inode->i_atime, ctx->time_fudge))
2122                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2123                 else if (EXT4_XTIME_FUTURE(ctx, sb, inode->i_mtime,
2124                                            ctx->time_fudge))
2125                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2126
2127                 if (EXT4_XTIME_FUTURE(ctx, sb, inode->i_ctime, ctx->time_fudge))
2128                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_HIGH);
2129                 else if (EXT4_XTIME_ANCIENT(ctx, sb, inode->i_ctime,
2130                                             ctx->time_fudge))
2131                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_HIGH);
2132
2133                 /* i_crtime is checked in check_inode_extra_space() */
2134
2135                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
2136                     !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
2137                         if (inode->i_block[EXT2_IND_BLOCK])
2138                                 ctx->fs_ind_count++;
2139                         if (inode->i_block[EXT2_DIND_BLOCK])
2140                                 ctx->fs_dind_count++;
2141                         if (inode->i_block[EXT2_TIND_BLOCK])
2142                                 ctx->fs_tind_count++;
2143                 }
2144                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
2145                     !(inode->i_flags & EXT4_INLINE_DATA_FL) &&
2146                     (inode->i_block[EXT2_IND_BLOCK] ||
2147                      inode->i_block[EXT2_DIND_BLOCK] ||
2148                      inode->i_block[EXT2_TIND_BLOCK] ||
2149                      ext2fs_file_acl_block(fs, inode))) {
2150                         struct process_inode_block *itp;
2151
2152                         itp = &inodes_to_process[process_inode_count];
2153                         itp->ino = ino;
2154                         itp->ea_ibody_quota = ea_ibody_quota;
2155                         if (inode_size < sizeof(struct ext2_inode_large))
2156                                 memcpy(&itp->inode, inode, inode_size);
2157                         else
2158                                 memcpy(&itp->inode, inode, sizeof(itp->inode));
2159                         process_inode_count++;
2160                 } else
2161                         check_blocks(ctx, &pctx, block_buf, &ea_ibody_quota);
2162
2163                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
2164
2165                 if (ctx->flags & E2F_FLAG_EXPAND_EISIZE) {
2166                         struct ext2_inode_large *inode_l;
2167
2168                         inode_l = (struct ext2_inode_large *)inode;
2169
2170                         if (inode_l->i_extra_isize < ctx->want_extra_isize) {
2171                                 fix_problem(ctx, PR_1_EXPAND_EISIZE, &pctx);
2172                                 inode_exp = e2fsck_pass1_expand_eisize(ctx,
2173                                                                        inode_l,
2174                                                                        &pctx);
2175                         }
2176                         if ((inode_l->i_extra_isize < ctx->min_extra_isize) &&
2177                             inode_exp == 0)
2178                                 ctx->min_extra_isize = inode_l->i_extra_isize;
2179                 }
2180
2181                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2182                         goto endit;
2183
2184                 if (process_inode_count >= ctx->process_inode_size) {
2185                         process_inodes(ctx, block_buf);
2186
2187                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2188                                 goto endit;
2189                 }
2190         }
2191         process_inodes(ctx, block_buf);
2192         ext2fs_close_inode_scan(scan);
2193         scan = NULL;
2194
2195         reserve_block_for_root_repair(ctx);
2196         reserve_block_for_lnf_repair(ctx);
2197
2198         /*
2199          * If any extended attribute blocks' reference counts need to
2200          * be adjusted, either up (ctx->refcount_extra), or down
2201          * (ctx->refcount), then fix them.
2202          */
2203         if (ctx->refcount) {
2204                 adjust_extattr_refcount(ctx, ctx->refcount, block_buf, -1);
2205                 ea_refcount_free(ctx->refcount);
2206                 ctx->refcount = 0;
2207         }
2208         if (ctx->refcount_extra) {
2209                 adjust_extattr_refcount(ctx, ctx->refcount_extra,
2210                                         block_buf, +1);
2211                 ea_refcount_free(ctx->refcount_extra);
2212                 ctx->refcount_extra = 0;
2213         }
2214
2215         if (ctx->ea_block_quota_blocks) {
2216                 ea_refcount_free(ctx->ea_block_quota_blocks);
2217                 ctx->ea_block_quota_blocks = 0;
2218         }
2219
2220         if (ctx->ea_block_quota_inodes) {
2221                 ea_refcount_free(ctx->ea_block_quota_inodes);
2222                 ctx->ea_block_quota_inodes = 0;
2223         }
2224
2225         if (ctx->invalid_bitmaps)
2226                 handle_fs_bad_blocks(ctx);
2227
2228         /* We don't need the block_ea_map any more */
2229         if (ctx->block_ea_map) {
2230                 ext2fs_free_block_bitmap(ctx->block_ea_map);
2231                 ctx->block_ea_map = 0;
2232         }
2233
2234         if (ctx->flags & E2F_FLAG_RESIZE_INODE) {
2235                 clear_problem_context(&pctx);
2236                 pctx.errcode = ext2fs_create_resize_inode(fs);
2237                 if (pctx.errcode) {
2238                         if (!fix_problem(ctx, PR_1_RESIZE_INODE_CREATE,
2239                                          &pctx)) {
2240                                 ctx->flags |= E2F_FLAG_ABORT;
2241                                 goto endit;
2242                         }
2243                         pctx.errcode = 0;
2244                 }
2245                 if (!pctx.errcode) {
2246                         e2fsck_read_inode(ctx, EXT2_RESIZE_INO, inode,
2247                                           "recreate inode");
2248                         inode->i_mtime = ctx->now;
2249                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, inode,
2250                                            "recreate inode");
2251                 }
2252                 ctx->flags &= ~E2F_FLAG_RESIZE_INODE;
2253         }
2254
2255         if (ctx->flags & E2F_FLAG_RESTART) {
2256                 /*
2257                  * Only the master copy of the superblock and block
2258                  * group descriptors are going to be written during a
2259                  * restart, so set the superblock to be used to be the
2260                  * master superblock.
2261                  */
2262                 ctx->use_superblock = 0;
2263                 unwind_pass1(fs);
2264                 goto endit;
2265         }
2266
2267         if (ctx->block_dup_map) {
2268                 if (ctx->options & E2F_OPT_PREEN) {
2269                         clear_problem_context(&pctx);
2270                         fix_problem(ctx, PR_1_DUP_BLOCKS_PREENSTOP, &pctx);
2271                 }
2272                 e2fsck_pass1_dupblocks(ctx, block_buf);
2273         }
2274         ctx->flags |= E2F_FLAG_ALLOC_OK;
2275         ext2fs_free_mem(&inodes_to_process);
2276 endit:
2277         e2fsck_use_inode_shortcuts(ctx, 0);
2278
2279         if (scan)
2280                 ext2fs_close_inode_scan(scan);
2281         if (block_buf)
2282                 ext2fs_free_mem(&block_buf);
2283         if (inode)
2284                 ext2fs_free_mem(&inode);
2285
2286         /*
2287          * The l+f inode may have been cleared, so zap it now and
2288          * later passes will recalculate it if necessary
2289          */
2290         ctx->lost_and_found = 0;
2291
2292         if ((ctx->flags & E2F_FLAG_SIGNAL_MASK) == 0)
2293                 print_resource_track(ctx, _("Pass 1"), &rtrack, ctx->fs->io);
2294         else
2295                 ctx->invalid_bitmaps++;
2296 }
2297 #undef FINISH_INODE_LOOP
2298
2299 /*
2300  * When the inode_scan routines call this callback at the end of the
2301  * glock group, call process_inodes.
2302  */
2303 static errcode_t scan_callback(ext2_filsys fs,
2304                                ext2_inode_scan scan EXT2FS_ATTR((unused)),
2305                                dgrp_t group, void * priv_data)
2306 {
2307         struct scan_callback_struct *scan_struct;
2308         e2fsck_t ctx;
2309
2310         scan_struct = (struct scan_callback_struct *) priv_data;
2311         ctx = scan_struct->ctx;
2312
2313         process_inodes((e2fsck_t) fs->priv_data, scan_struct->block_buf);
2314
2315         if (ctx->progress)
2316                 if ((ctx->progress)(ctx, 1, group+1,
2317                                     ctx->fs->group_desc_count))
2318                         return EXT2_ET_CANCEL_REQUESTED;
2319
2320         return 0;
2321 }
2322
2323 /*
2324  * Process the inodes in the "inodes to process" list.
2325  */
2326 static void process_inodes(e2fsck_t ctx, char *block_buf)
2327 {
2328         int                     i;
2329         struct ext2_inode       *old_stashed_inode;
2330         ext2_ino_t              old_stashed_ino;
2331         const char              *old_operation;
2332         char                    buf[80];
2333         struct problem_context  pctx;
2334
2335 #if 0
2336         printf("begin process_inodes: ");
2337 #endif
2338         if (process_inode_count == 0)
2339                 return;
2340         old_operation = ehandler_operation(0);
2341         old_stashed_inode = ctx->stashed_inode;
2342         old_stashed_ino = ctx->stashed_ino;
2343         qsort(inodes_to_process, process_inode_count,
2344                       sizeof(struct process_inode_block), process_inode_cmp);
2345         clear_problem_context(&pctx);
2346         for (i=0; i < process_inode_count; i++) {
2347                 pctx.inode = ctx->stashed_inode =
2348                         (struct ext2_inode *) &inodes_to_process[i].inode;
2349                 pctx.ino = ctx->stashed_ino = inodes_to_process[i].ino;
2350
2351 #if 0
2352                 printf("%u ", pctx.ino);
2353 #endif
2354                 sprintf(buf, _("reading indirect blocks of inode %u"),
2355                         pctx.ino);
2356                 ehandler_operation(buf);
2357                 check_blocks(ctx, &pctx, block_buf,
2358                              &inodes_to_process[i].ea_ibody_quota);
2359                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2360                         break;
2361         }
2362         ctx->stashed_inode = old_stashed_inode;
2363         ctx->stashed_ino = old_stashed_ino;
2364         process_inode_count = 0;
2365 #if 0
2366         printf("end process inodes\n");
2367 #endif
2368         ehandler_operation(old_operation);
2369 }
2370
2371 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b)
2372 {
2373         const struct process_inode_block *ib_a =
2374                 (const struct process_inode_block *) a;
2375         const struct process_inode_block *ib_b =
2376                 (const struct process_inode_block *) b;
2377         int     ret;
2378
2379         ret = (ib_a->inode.i_block[EXT2_IND_BLOCK] -
2380                ib_b->inode.i_block[EXT2_IND_BLOCK]);
2381         if (ret == 0)
2382                 /*
2383                  * We only call process_inodes() for non-extent
2384                  * inodes, so it's OK to pass NULL to
2385                  * ext2fs_file_acl_block() here.
2386                  */
2387                 ret = ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_a->inode)) -
2388                         ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_b->inode));
2389         if (ret == 0)
2390                 ret = ib_a->ino - ib_b->ino;
2391         return ret;
2392 }
2393
2394 /*
2395  * Mark an inode as being bad and increment its badness counter.
2396  */
2397 void e2fsck_mark_inode_bad_loc(e2fsck_t ctx, ino_t ino, int count,
2398                                const char *func, const int line)
2399 {
2400         struct          problem_context pctx;
2401         __u16           result;
2402
2403         if (!ctx->inode_badness) {
2404                 clear_problem_context(&pctx);
2405
2406                 pctx.errcode = ext2fs_create_icount2(ctx->fs, 0, 0, NULL,
2407                                                      &ctx->inode_badness);
2408                 if (pctx.errcode) {
2409                         fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
2410                         ctx->flags |= E2F_FLAG_ABORT;
2411                         return;
2412                 }
2413         }
2414         ext2fs_icount_fetch(ctx->inode_badness, ino, &result);
2415         ext2fs_icount_store(ctx->inode_badness, ino, count + result);
2416
2417         if (ctx->options & E2F_OPT_DEBUG)
2418                 fprintf(stderr, "%s:%d: increase inode %lu badness %u to %u\n",
2419                         func, line, (unsigned long)ino, result, count + result);
2420 }
2421
2422 static void add_encrypted_dir(e2fsck_t ctx, ino_t ino)
2423 {
2424         struct          problem_context pctx;
2425
2426         if (!ctx->encrypted_dirs) {
2427                 pctx.errcode = ext2fs_u32_list_create(&ctx->encrypted_dirs, 0);
2428                 if (pctx.errcode)
2429                         goto error;
2430         }
2431         pctx.errcode = ext2fs_u32_list_add(ctx->encrypted_dirs, ino);
2432         if (pctx.errcode == 0)
2433                 return;
2434 error:
2435         fix_problem(ctx, PR_1_ALLOCATE_ENCRYPTED_DIRLIST, &pctx);
2436         /* Should never get here */
2437         ctx->flags |= E2F_FLAG_ABORT;
2438 }
2439
2440 /*
2441  * This procedure will allocate the inode "bb" (badblock) map table
2442  */
2443 static void alloc_bb_map(e2fsck_t ctx)
2444 {
2445         struct          problem_context pctx;
2446
2447         clear_problem_context(&pctx);
2448         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2449                         _("inode in bad block map"), EXT2FS_BMAP64_RBTREE,
2450                         "inode_bb_map", &ctx->inode_bb_map);
2451         if (pctx.errcode) {
2452                 pctx.num = 4;
2453                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2454                 /* Should never get here */
2455                 ctx->flags |= E2F_FLAG_ABORT;
2456                 return;
2457         }
2458 }
2459
2460 /*
2461  * This procedure will allocate the inode imagic table
2462  */
2463 static void alloc_imagic_map(e2fsck_t ctx)
2464 {
2465         struct          problem_context pctx;
2466
2467         clear_problem_context(&pctx);
2468         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2469                         _("imagic inode map"), EXT2FS_BMAP64_RBTREE,
2470                         "inode_imagic_map", &ctx->inode_imagic_map);
2471         if (pctx.errcode) {
2472                 pctx.num = 5;
2473                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2474                 /* Should never get here */
2475                 ctx->flags |= E2F_FLAG_ABORT;
2476                 return;
2477         }
2478 }
2479
2480 /*
2481  * Marks a block as in use, setting the dup_map if it's been set
2482  * already.  Called by process_block and process_bad_block.
2483  *
2484  * WARNING: Assumes checks have already been done to make sure block
2485  * is valid.  This is true in both process_block and process_bad_block.
2486  */
2487 static _INLINE_ void mark_block_used(e2fsck_t ctx, blk64_t block)
2488 {
2489         struct          problem_context pctx;
2490
2491         clear_problem_context(&pctx);
2492
2493         if (ext2fs_fast_test_block_bitmap2(ctx->block_found_map, block)) {
2494                 if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2495                     !(ctx->options & E2F_OPT_UNSHARE_BLOCKS)) {
2496                         return;
2497                 }
2498                 if (!ctx->block_dup_map) {
2499                         pctx.errcode = e2fsck_allocate_block_bitmap(ctx->fs,
2500                                         _("multiply claimed block map"),
2501                                         EXT2FS_BMAP64_RBTREE, "block_dup_map",
2502                                         &ctx->block_dup_map);
2503                         if (pctx.errcode) {
2504                                 pctx.num = 3;
2505                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR,
2506                                             &pctx);
2507                                 /* Should never get here */
2508                                 ctx->flags |= E2F_FLAG_ABORT;
2509                                 return;
2510                         }
2511                 }
2512                 ext2fs_fast_mark_block_bitmap2(ctx->block_dup_map, block);
2513         } else {
2514                 ext2fs_fast_mark_block_bitmap2(ctx->block_found_map, block);
2515         }
2516 }
2517
2518 /*
2519  * When cluster size is greater than one block, it is caller's responsibility
2520  * to make sure block parameter starts at a cluster boundary.
2521  */
2522 static _INLINE_ void mark_blocks_used(e2fsck_t ctx, blk64_t block,
2523                                       unsigned int num)
2524 {
2525         if (ext2fs_test_block_bitmap_range2(ctx->block_found_map, block, num))
2526                 ext2fs_mark_block_bitmap_range2(ctx->block_found_map, block, num);
2527         else {
2528                 unsigned int i;
2529
2530                 for (i = 0; i < num; i += EXT2FS_CLUSTER_RATIO(ctx->fs))
2531                         mark_block_used(ctx, block + i);
2532         }
2533 }
2534
2535 /*
2536  * Adjust the extended attribute block's reference counts at the end
2537  * of pass 1, either by subtracting out references for EA blocks that
2538  * are still referenced in ctx->refcount, or by adding references for
2539  * EA blocks that had extra references as accounted for in
2540  * ctx->refcount_extra.
2541  */
2542 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
2543                                     char *block_buf, int adjust_sign)
2544 {
2545         struct ext2_ext_attr_header     *header;
2546         struct problem_context          pctx;
2547         ext2_filsys                     fs = ctx->fs;
2548         blk64_t                         blk;
2549         __u32                           should_be;
2550         ea_value_t                      count;
2551
2552         clear_problem_context(&pctx);
2553
2554         ea_refcount_intr_begin(refcount);
2555         while (1) {
2556                 if ((blk = ea_refcount_intr_next(refcount, &count)) == 0)
2557                         break;
2558                 pctx.blk = blk;
2559                 pctx.errcode = ext2fs_read_ext_attr3(fs, blk, block_buf,
2560                                                      pctx.ino);
2561                 /* We already checked this block, shouldn't happen */
2562                 if (pctx.errcode) {
2563                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
2564                         return;
2565                 }
2566                 header = BHDR(block_buf);
2567                 if (header->h_magic != EXT2_EXT_ATTR_MAGIC) {
2568                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
2569                         return;
2570                 }
2571
2572                 pctx.blkcount = header->h_refcount;
2573                 should_be = header->h_refcount + adjust_sign * (int)count;
2574                 pctx.num = should_be;
2575                 if (fix_problem(ctx, PR_1_EXTATTR_REFCOUNT, &pctx)) {
2576                         header->h_refcount = should_be;
2577                         pctx.errcode = ext2fs_write_ext_attr3(fs, blk,
2578                                                              block_buf,
2579                                                              pctx.ino);
2580                         if (pctx.errcode) {
2581                                 fix_problem(ctx, PR_1_EXTATTR_WRITE_ABORT,
2582                                             &pctx);
2583                                 continue;
2584                         }
2585                 }
2586         }
2587 }
2588
2589 /*
2590  * Handle processing the extended attribute blocks
2591  */
2592 static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx,
2593                            char *block_buf, struct ea_quota *ea_block_quota)
2594 {
2595         ext2_filsys fs = ctx->fs;
2596         ext2_ino_t      ino = pctx->ino;
2597         struct ext2_inode *inode = pctx->inode;
2598         blk64_t         blk;
2599         char *          end;
2600         struct ext2_ext_attr_header *header;
2601         struct ext2_ext_attr_entry *first, *entry;
2602         blk64_t         quota_blocks = EXT2FS_C2B(fs, 1);
2603         __u64           quota_inodes = 0;
2604         region_t        region = 0;
2605         int             failed_csum = 0;
2606
2607         ea_block_quota->blocks = 0;
2608         ea_block_quota->inodes = 0;
2609
2610         blk = ext2fs_file_acl_block(fs, inode);
2611         if (blk == 0)
2612                 return 0;
2613
2614         /*
2615          * If the Extended attribute flag isn't set, then a non-zero
2616          * file acl means that the inode is corrupted.
2617          *
2618          * Or if the extended attribute block is an invalid block,
2619          * then the inode is also corrupted.
2620          */
2621         if (!ext2fs_has_feature_xattr(fs->super) ||
2622             (blk < fs->super->s_first_data_block) ||
2623             (blk >= ext2fs_blocks_count(fs->super))) {
2624                 /* Fixed in pass2, e2fsck_process_bad_inode(). */
2625                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2626                 return 0;
2627         }
2628
2629         /* If ea bitmap hasn't been allocated, create it */
2630         if (!ctx->block_ea_map) {
2631                 pctx->errcode = e2fsck_allocate_block_bitmap(fs,
2632                                         _("ext attr block map"),
2633                                         EXT2FS_BMAP64_RBTREE, "block_ea_map",
2634                                         &ctx->block_ea_map);
2635                 if (pctx->errcode) {
2636                         pctx->num = 2;
2637                         fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, pctx);
2638                         ctx->flags |= E2F_FLAG_ABORT;
2639                         return 0;
2640                 }
2641         }
2642
2643         /* Create the EA refcount structure if necessary */
2644         if (!ctx->refcount) {
2645                 pctx->errcode = ea_refcount_create(0, &ctx->refcount);
2646                 if (pctx->errcode) {
2647                         pctx->num = 1;
2648                         fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2649                         ctx->flags |= E2F_FLAG_ABORT;
2650                         return 0;
2651                 }
2652         }
2653
2654 #if 0
2655         /* Debugging text */
2656         printf("Inode %u has EA block %u\n", ino, blk);
2657 #endif
2658
2659         /* Have we seen this EA block before? */
2660         if (ext2fs_fast_test_block_bitmap2(ctx->block_ea_map, blk)) {
2661                 ea_block_quota->blocks = EXT2FS_C2B(fs, 1);
2662                 ea_block_quota->inodes = 0;
2663
2664                 if (ctx->ea_block_quota_blocks) {
2665                         ea_refcount_fetch(ctx->ea_block_quota_blocks, blk,
2666                                           &quota_blocks);
2667                         if (quota_blocks)
2668                                 ea_block_quota->blocks = quota_blocks;
2669                 }
2670
2671                 if (ctx->ea_block_quota_inodes)
2672                         ea_refcount_fetch(ctx->ea_block_quota_inodes, blk,
2673                                           &ea_block_quota->inodes);
2674
2675                 if (ea_refcount_decrement(ctx->refcount, blk, 0) == 0)
2676                         return 1;
2677                 /* Ooops, this EA was referenced more than it stated */
2678                 if (!ctx->refcount_extra) {
2679                         pctx->errcode = ea_refcount_create(0,
2680                                            &ctx->refcount_extra);
2681                         if (pctx->errcode) {
2682                                 pctx->num = 2;
2683                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2684                                 ctx->flags |= E2F_FLAG_ABORT;
2685                                 return 0;
2686                         }
2687                 }
2688                 ea_refcount_increment(ctx->refcount_extra, blk, 0);
2689                 return 1;
2690         }
2691
2692         /*
2693          * OK, we haven't seen this EA block yet.  So we need to
2694          * validate it
2695          */
2696         pctx->blk = blk;
2697         pctx->errcode = ext2fs_read_ext_attr3(fs, blk, block_buf, pctx->ino);
2698         if (pctx->errcode == EXT2_ET_EXT_ATTR_CSUM_INVALID) {
2699                 pctx->errcode = 0;
2700                 failed_csum = 1;
2701         } else if (pctx->errcode == EXT2_ET_BAD_EA_HEADER)
2702                 pctx->errcode = 0;
2703
2704         if (pctx->errcode &&
2705             fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx)) {
2706                 pctx->errcode = 0;
2707                 goto clear_extattr;
2708         }
2709         header = BHDR(block_buf);
2710         pctx->blk = ext2fs_file_acl_block(fs, inode);
2711         if (((ctx->ext_attr_ver == 1) &&
2712              (header->h_magic != EXT2_EXT_ATTR_MAGIC_v1)) ||
2713             ((ctx->ext_attr_ver == 2) &&
2714              (header->h_magic != EXT2_EXT_ATTR_MAGIC))) {
2715                 if (fix_problem(ctx, PR_1_BAD_EA_BLOCK, pctx))
2716                         goto clear_extattr;
2717         }
2718
2719         if (header->h_blocks != 1) {
2720                 if (fix_problem(ctx, PR_1_EA_MULTI_BLOCK, pctx))
2721                         goto clear_extattr;
2722         }
2723
2724         if (pctx->errcode && fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx))
2725                 goto clear_extattr;
2726
2727         region = region_create(0, fs->blocksize);
2728         if (!region) {
2729                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
2730                 ctx->flags |= E2F_FLAG_ABORT;
2731                 return 0;
2732         }
2733         if (region_allocate(region, 0, sizeof(struct ext2_ext_attr_header))) {
2734                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2735                         goto clear_extattr;
2736         }
2737
2738         first = (struct ext2_ext_attr_entry *)(header+1);
2739         end = block_buf + fs->blocksize;
2740         entry = first;
2741         while ((char *)entry < end && *(__u32 *)entry) {
2742                 __u32 hash;
2743
2744                 if (region_allocate(region, (char *)entry - (char *)header,
2745                                    EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
2746                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2747                                 goto clear_extattr;
2748                         break;
2749                 }
2750                 if ((ctx->ext_attr_ver == 1 &&
2751                      (entry->e_name_len == 0 || entry->e_name_index != 0)) ||
2752                     (ctx->ext_attr_ver == 2 &&
2753                      entry->e_name_index == 0)) {
2754                         if (fix_problem(ctx, PR_1_EA_BAD_NAME, pctx))
2755                                 goto clear_extattr;
2756                         break;
2757                 }
2758                 if (entry->e_value_inum == 0) {
2759                         if (entry->e_value_offs + entry->e_value_size >
2760                             fs->blocksize) {
2761                                 if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2762                                         goto clear_extattr;
2763                                 break;
2764                         }
2765                         if (entry->e_value_size &&
2766                             region_allocate(region, entry->e_value_offs,
2767                                             EXT2_EXT_ATTR_SIZE(entry->e_value_size))) {
2768                                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION,
2769                                                 pctx))
2770                                         goto clear_extattr;
2771                         }
2772
2773                         hash = ext2fs_ext_attr_hash_entry(entry, block_buf +
2774                                                           entry->e_value_offs);
2775
2776                         if (entry->e_hash != hash) {
2777                                 pctx->num = entry->e_hash;
2778                                 if (fix_problem(ctx, PR_1_ATTR_HASH, pctx))
2779                                         goto clear_extattr;
2780                                 entry->e_hash = hash;
2781                         }
2782                 } else {
2783                         problem_t problem;
2784                         blk64_t entry_quota_blocks;
2785
2786                         problem = check_large_ea_inode(ctx, entry, pctx,
2787                                                        &entry_quota_blocks);
2788                         if (problem && fix_problem(ctx, problem, pctx))
2789                                 goto clear_extattr;
2790
2791                         quota_blocks += entry_quota_blocks;
2792                         quota_inodes++;
2793                 }
2794
2795                 entry = EXT2_EXT_ATTR_NEXT(entry);
2796         }
2797         if (region_allocate(region, (char *)entry - (char *)header, 4)) {
2798                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2799                         goto clear_extattr;
2800         }
2801         region_free(region);
2802
2803         /*
2804          * We only get here if there was no other errors that were fixed.
2805          * If there was a checksum fail, ask to correct it.
2806          */
2807         if (failed_csum &&
2808             fix_problem(ctx, PR_1_EA_BLOCK_ONLY_CSUM_INVALID, pctx)) {
2809                 pctx->errcode = ext2fs_write_ext_attr3(fs, blk, block_buf,
2810                                                        pctx->ino);
2811                 if (pctx->errcode)
2812                         return 0;
2813         }
2814
2815         if (quota_blocks != EXT2FS_C2B(fs, 1U)) {
2816                 if (!ctx->ea_block_quota_blocks) {
2817                         pctx->errcode = ea_refcount_create(0,
2818                                                 &ctx->ea_block_quota_blocks);
2819                         if (pctx->errcode) {
2820                                 pctx->num = 3;
2821                                 goto refcount_fail;
2822                         }
2823                 }
2824                 ea_refcount_store(ctx->ea_block_quota_blocks, blk,
2825                                   quota_blocks);
2826         }
2827
2828         if (quota_inodes) {
2829                 if (!ctx->ea_block_quota_inodes) {
2830                         pctx->errcode = ea_refcount_create(0,
2831                                                 &ctx->ea_block_quota_inodes);
2832                         if (pctx->errcode) {
2833                                 pctx->num = 4;
2834 refcount_fail:
2835                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2836                                 ctx->flags |= E2F_FLAG_ABORT;
2837                                 return 0;
2838                         }
2839                 }
2840
2841                 ea_refcount_store(ctx->ea_block_quota_inodes, blk,
2842                                   quota_inodes);
2843         }
2844         ea_block_quota->blocks = quota_blocks;
2845         ea_block_quota->inodes = quota_inodes;
2846
2847         inc_ea_inode_refs(ctx, pctx, first, end);
2848         ea_refcount_store(ctx->refcount, blk, header->h_refcount - 1);
2849         mark_block_used(ctx, blk);
2850         ext2fs_fast_mark_block_bitmap2(ctx->block_ea_map, blk);
2851         return 1;
2852
2853 clear_extattr:
2854         if (region)
2855                 region_free(region);
2856         ext2fs_file_acl_block_set(fs, inode, 0);
2857         e2fsck_write_inode(ctx, ino, inode, "check_ext_attr");
2858         return 0;
2859 }
2860
2861 /* Returns 1 if bad htree, 0 if OK */
2862 static int handle_htree(e2fsck_t ctx, struct problem_context *pctx,
2863                         ext2_ino_t ino, struct ext2_inode *inode,
2864                         char *block_buf)
2865 {
2866         struct ext2_dx_root_info        *root;
2867         ext2_filsys                     fs = ctx->fs;
2868         errcode_t                       retval;
2869         blk64_t                         blk;
2870
2871         if ((!LINUX_S_ISDIR(inode->i_mode) &&
2872              fix_problem(ctx, PR_1_HTREE_NODIR, pctx)) ||
2873             (!ext2fs_has_feature_dir_index(fs->super))) {
2874                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2875                 if (fix_problem(ctx, PR_1_HTREE_SET, pctx))
2876                         return 1;
2877         }
2878
2879         pctx->errcode = ext2fs_bmap2(fs, ino, inode, 0, 0, 0, 0, &blk);
2880
2881         if ((pctx->errcode) ||
2882             (blk == 0) ||
2883             (blk < fs->super->s_first_data_block) ||
2884             (blk >= ext2fs_blocks_count(fs->super))) {
2885                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2886                 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2887                         return 1;
2888                 else
2889                         return 0;
2890         }
2891
2892         retval = io_channel_read_blk64(fs->io, blk, 1, block_buf);
2893         if (retval) {
2894                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2895                 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2896                         return 1;
2897         }
2898
2899         /* XXX should check that beginning matches a directory */
2900         root = get_ext2_dx_root_info(fs, block_buf);
2901
2902         if ((root->reserved_zero || root->info_length < 8) &&
2903             fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2904                 return 1;
2905
2906         pctx->num = root->hash_version;
2907         if ((root->hash_version != EXT2_HASH_LEGACY) &&
2908             (root->hash_version != EXT2_HASH_HALF_MD4) &&
2909             (root->hash_version != EXT2_HASH_TEA) &&
2910             fix_problem(ctx, PR_1_HTREE_HASHV, pctx))
2911                 return 1;
2912
2913         if ((root->unused_flags & EXT2_HASH_FLAG_INCOMPAT) &&
2914             fix_problem(ctx, PR_1_HTREE_INCOMPAT, pctx))
2915                 return 1;
2916
2917         pctx->num = root->indirect_levels;
2918         if ((root->indirect_levels > ext2_dir_htree_level(fs)) &&
2919             fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2920                 return 1;
2921
2922         return 0;
2923 }
2924
2925 void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino,
2926                         struct ext2_inode *inode, int restart_flag,
2927                         const char *source)
2928 {
2929         inode->i_flags = 0;
2930         inode->i_links_count = 0;
2931         ext2fs_icount_store(ctx->inode_link_info, ino, 0);
2932         inode->i_dtime = ctx->now;
2933
2934         /*
2935          * If a special inode has such rotten block mappings that we
2936          * want to clear the whole inode, be sure to actually zap
2937          * the block maps because i_links_count isn't checked for
2938          * special inodes, and we'll end up right back here the next
2939          * time we run fsck.
2940          */
2941         if (ino < EXT2_FIRST_INODE(ctx->fs->super))
2942                 memset(inode->i_block, 0, sizeof(inode->i_block));
2943
2944         ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
2945         ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
2946         if (ctx->inode_reg_map)
2947                 ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
2948         if (ctx->inode_badness)
2949                 ext2fs_icount_store(ctx->inode_badness, ino, 0);
2950
2951         /*
2952          * If the inode was partially accounted for before processing
2953          * was aborted, we need to restart the pass 1 scan.
2954          */
2955         ctx->flags |= restart_flag;
2956
2957         if (ino == EXT2_BAD_INO)
2958                 memset(inode, 0, sizeof(struct ext2_inode));
2959
2960         e2fsck_write_inode(ctx, ino, inode, source);
2961 }
2962
2963 /*
2964  * Use the multiple-blocks reclamation code to fix alignment problems in
2965  * a bigalloc filesystem.  We want a logical cluster to map to *only* one
2966  * physical cluster, and we want the block offsets within that cluster to
2967  * line up.
2968  */
2969 static int has_unaligned_cluster_map(e2fsck_t ctx,
2970                                      blk64_t last_pblk, blk64_t last_lblk,
2971                                      blk64_t pblk, blk64_t lblk)
2972 {
2973         blk64_t cluster_mask;
2974
2975         if (!ctx->fs->cluster_ratio_bits)
2976                 return 0;
2977         cluster_mask = EXT2FS_CLUSTER_MASK(ctx->fs);
2978
2979         /*
2980          * If the block in the logical cluster doesn't align with the block in
2981          * the physical cluster...
2982          */
2983         if ((lblk & cluster_mask) != (pblk & cluster_mask))
2984                 return 1;
2985
2986         /*
2987          * If we cross a physical cluster boundary within a logical cluster...
2988          */
2989         if (last_pblk && (lblk & cluster_mask) != 0 &&
2990             EXT2FS_B2C(ctx->fs, lblk) == EXT2FS_B2C(ctx->fs, last_lblk) &&
2991             EXT2FS_B2C(ctx->fs, pblk) != EXT2FS_B2C(ctx->fs, last_pblk))
2992                 return 1;
2993
2994         return 0;
2995 }
2996
2997 static void scan_extent_node(e2fsck_t ctx, struct problem_context *pctx,
2998                              struct process_block_struct *pb,
2999                              blk64_t start_block, blk64_t end_block,
3000                              blk64_t eof_block,
3001                              ext2_extent_handle_t ehandle,
3002                              int try_repairs)
3003 {
3004         struct ext2fs_extent    extent;
3005         blk64_t                 blk, last_lblk;
3006         unsigned int            i, n;
3007         int                     is_dir, is_leaf;
3008         problem_t               problem;
3009         struct ext2_extent_info info;
3010         int                     failed_csum = 0;
3011
3012         if (pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID)
3013                 failed_csum = 1;
3014
3015         pctx->errcode = ext2fs_extent_get_info(ehandle, &info);
3016         if (pctx->errcode)
3017                 return;
3018         if (!(ctx->options & E2F_OPT_FIXES_ONLY) &&
3019             !pb->eti.force_rebuild) {
3020                 struct extent_tree_level *etl;
3021
3022                 etl = pb->eti.ext_info + info.curr_level;
3023                 etl->num_extents += info.num_entries;
3024                 etl->max_extents += info.max_entries;
3025                 /*
3026                  * Implementation wart: Splitting extent blocks when appending
3027                  * will leave the old block with one free entry.  Therefore
3028                  * unless the node is totally full, pretend that a non-root
3029                  * extent block can hold one fewer entry than it actually does,
3030                  * so that we don't repeatedly rebuild the extent tree.
3031                  */
3032                 if (info.curr_level && info.num_entries < info.max_entries)
3033                         etl->max_extents--;
3034         }
3035
3036         pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_FIRST_SIB,
3037                                           &extent);
3038         while ((pctx->errcode == 0 ||
3039                 pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID) &&
3040                info.num_entries-- > 0) {
3041                 is_leaf = extent.e_flags & EXT2_EXTENT_FLAGS_LEAF;
3042                 is_dir = LINUX_S_ISDIR(pctx->inode->i_mode);
3043                 last_lblk = extent.e_lblk + extent.e_len - 1;
3044
3045                 problem = 0;
3046                 pctx->blk = extent.e_pblk;
3047                 pctx->blk2 = extent.e_lblk;
3048                 pctx->num = extent.e_len;
3049                 pctx->blkcount = extent.e_lblk + extent.e_len;
3050
3051                 if (extent.e_pblk == 0 ||
3052                     extent.e_pblk < ctx->fs->super->s_first_data_block ||
3053                     extent.e_pblk >= ext2fs_blocks_count(ctx->fs->super))
3054                         problem = PR_1_EXTENT_BAD_START_BLK;
3055                 else if (extent.e_lblk < start_block)
3056                         problem = PR_1_OUT_OF_ORDER_EXTENTS;
3057                 else if ((end_block && last_lblk > end_block) &&
3058                          (!(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT &&
3059                                 last_lblk > eof_block)))
3060                         problem = PR_1_EXTENT_END_OUT_OF_BOUNDS;
3061                 else if (is_leaf && extent.e_len == 0)
3062                         problem = PR_1_EXTENT_LENGTH_ZERO;
3063                 else if (is_leaf &&
3064                          (extent.e_pblk + extent.e_len) >
3065                          ext2fs_blocks_count(ctx->fs->super))
3066                         problem = PR_1_EXTENT_ENDS_BEYOND;
3067                 else if (is_leaf && is_dir &&
3068                          ((extent.e_lblk + extent.e_len) >
3069                           (1U << (21 - ctx->fs->super->s_log_block_size))))
3070                         problem = PR_1_TOOBIG_DIR;
3071
3072                 if (is_leaf && problem == 0 && extent.e_len > 0) {
3073 #if 0
3074                         printf("extent_region(ino=%u, expect=%llu, "
3075                                "lblk=%llu, len=%u)\n",
3076                                pb->ino, pb->next_lblock,
3077                                extent.e_lblk, extent.e_len);
3078 #endif
3079                         if (extent.e_lblk < pb->next_lblock)
3080                                 problem = PR_1_EXTENT_COLLISION;
3081                         else if (extent.e_lblk + extent.e_len > pb->next_lblock)
3082                                 pb->next_lblock = extent.e_lblk + extent.e_len;
3083                 }
3084
3085                 /*
3086                  * Uninitialized blocks in a directory?  Clear the flag and
3087                  * we'll interpret the blocks later.
3088                  */
3089                 if (try_repairs && is_dir && problem == 0 &&
3090                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
3091                     fix_problem(ctx, PR_1_UNINIT_DBLOCK, pctx)) {
3092                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
3093                         pb->inode_modified = 1;
3094                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
3095                                                               &extent);
3096                         if (pctx->errcode)
3097                                 return;
3098                         failed_csum = 0;
3099                 }
3100
3101                 if (try_repairs && problem) {
3102                         /* To ensure that extent is in inode */
3103                         if (info.curr_level == 0)
3104                                 e2fsck_mark_inode_bad(ctx, pctx->ino,
3105                                                       BADNESS_HIGH);
3106 report_problem:
3107                         if (fix_problem(ctx, problem, pctx)) {
3108                                 if (ctx->invalid_bitmaps) {
3109                                         /*
3110                                          * If fsck knows the bitmaps are bad,
3111                                          * skip to the next extent and
3112                                          * try to clear this extent again
3113                                          * after fixing the bitmaps, by
3114                                          * restarting fsck.
3115                                          */
3116                                         pctx->errcode = ext2fs_extent_get(
3117                                                           ehandle,
3118                                                           EXT2_EXTENT_NEXT_SIB,
3119                                                           &extent);
3120                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3121                                         if (pctx->errcode ==
3122                                                     EXT2_ET_NO_CURRENT_NODE) {
3123                                                 pctx->errcode = 0;
3124                                                 break;
3125                                         }
3126                                         continue;
3127                                 }
3128                                 e2fsck_read_bitmaps(ctx);
3129                                 pb->inode_modified = 1;
3130                                 pctx->errcode =
3131                                         ext2fs_extent_delete(ehandle, 0);
3132                                 if (pctx->errcode) {
3133                                         pctx->str = "ext2fs_extent_delete";
3134                                         return;
3135                                 }
3136                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3137                                 if (pctx->errcode &&
3138                                     pctx->errcode != EXT2_ET_NO_CURRENT_NODE) {
3139                                         pctx->str = "ext2fs_extent_fix_parents";
3140                                         return;
3141                                 }
3142                                 pctx->errcode = ext2fs_extent_get(ehandle,
3143                                                                   EXT2_EXTENT_CURRENT,
3144                                                                   &extent);
3145                                 if (pctx->errcode == EXT2_ET_NO_CURRENT_NODE) {
3146                                         pctx->errcode = 0;
3147                                         break;
3148                                 }
3149                                 failed_csum = 0;
3150                                 continue;
3151                         }
3152                         goto next;
3153                 }
3154
3155                 if (!is_leaf) {
3156                         blk64_t lblk = extent.e_lblk;
3157                         int next_try_repairs = 1;
3158
3159                         blk = extent.e_pblk;
3160
3161                         /*
3162                          * If this lower extent block collides with critical
3163                          * metadata, don't try to repair the damage.  Pass 1b
3164                          * will reallocate the block; then we can try again.
3165                          */
3166                         if (pb->ino != EXT2_RESIZE_INO &&
3167                             extent.e_pblk < ctx->fs->super->s_blocks_count &&
3168                             ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3169                                                       extent.e_pblk)) {
3170                                 next_try_repairs = 0;
3171                                 pctx->blk = blk;
3172                                 fix_problem(ctx,
3173                                             PR_1_CRITICAL_METADATA_COLLISION,
3174                                             pctx);
3175                                 if ((ctx->options & E2F_OPT_NO) == 0)
3176                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3177                         }
3178                         pctx->errcode = ext2fs_extent_get(ehandle,
3179                                                   EXT2_EXTENT_DOWN, &extent);
3180                         if (pctx->errcode &&
3181                             pctx->errcode != EXT2_ET_EXTENT_CSUM_INVALID) {
3182                                 pctx->str = "EXT2_EXTENT_DOWN";
3183                                 problem = PR_1_EXTENT_HEADER_INVALID;
3184                                 if (!next_try_repairs)
3185                                         return;
3186                                 if (pctx->errcode == EXT2_ET_EXTENT_HEADER_BAD)
3187                                         goto report_problem;
3188                                 return;
3189                         }
3190                         /* The next extent should match this index's logical start */
3191                         if (extent.e_lblk != lblk) {
3192                                 struct ext2_extent_info e_info;
3193
3194                                 ext2fs_extent_get_info(ehandle, &e_info);
3195                                 pctx->blk = lblk;
3196                                 pctx->blk2 = extent.e_lblk;
3197                                 pctx->num = e_info.curr_level - 1;
3198                                 problem = PR_1_EXTENT_INDEX_START_INVALID;
3199                                 if (fix_problem(ctx, problem, pctx)) {
3200                                         pb->inode_modified = 1;
3201                                         pctx->errcode =
3202                                                 ext2fs_extent_fix_parents(ehandle);
3203                                         if (pctx->errcode) {
3204                                                 pctx->str = "ext2fs_extent_fix_parents";
3205                                                 return;
3206                                         }
3207                                 }
3208                         }
3209                         scan_extent_node(ctx, pctx, pb, extent.e_lblk,
3210                                          last_lblk, eof_block, ehandle,
3211                                          next_try_repairs);
3212                         if (pctx->errcode)
3213                                 return;
3214                         pctx->errcode = ext2fs_extent_get(ehandle,
3215                                                   EXT2_EXTENT_UP, &extent);
3216                         if (pctx->errcode) {
3217                                 pctx->str = "EXT2_EXTENT_UP";
3218                                 return;
3219                         }
3220                         mark_block_used(ctx, blk);
3221                         pb->num_blocks++;
3222                         goto next;
3223                 }
3224
3225                 if ((pb->previous_block != 0) &&
3226                     (pb->previous_block+1 != extent.e_pblk)) {
3227                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3228                                 char type = '?';
3229
3230                                 if (pb->is_dir)
3231                                         type = 'd';
3232                                 else if (pb->is_reg)
3233                                         type = 'f';
3234
3235                                 printf(("%6lu(%c): expecting %6lu "
3236                                         "actual extent "
3237                                         "phys %6lu log %lu len %lu\n"),
3238                                        (unsigned long) pctx->ino, type,
3239                                        (unsigned long) pb->previous_block+1,
3240                                        (unsigned long) extent.e_pblk,
3241                                        (unsigned long) extent.e_lblk,
3242                                        (unsigned long) extent.e_len);
3243                         }
3244                         pb->fragmented = 1;
3245                 }
3246                 /*
3247                  * If we notice a gap in the logical block mappings of an
3248                  * extent-mapped directory, offer to close the hole by
3249                  * moving the logical block down, otherwise we'll go mad in
3250                  * pass 3 allocating empty directory blocks to fill the hole.
3251                  */
3252                 if (try_repairs && is_dir &&
3253                     pb->last_block + 1 < extent.e_lblk) {
3254                         blk64_t new_lblk;
3255
3256                         new_lblk = pb->last_block + 1;
3257                         if (EXT2FS_CLUSTER_RATIO(ctx->fs) > 1)
3258                                 new_lblk = ((new_lblk +
3259                                              EXT2FS_CLUSTER_RATIO(ctx->fs) - 1) &
3260                                             ~EXT2FS_CLUSTER_MASK(ctx->fs)) |
3261                                            (extent.e_pblk &
3262                                             EXT2FS_CLUSTER_MASK(ctx->fs));
3263                         pctx->blk = extent.e_lblk;
3264                         pctx->blk2 = new_lblk;
3265                         if (fix_problem(ctx, PR_1_COLLAPSE_DBLOCK, pctx)) {
3266                                 extent.e_lblk = new_lblk;
3267                                 pb->inode_modified = 1;
3268                                 pctx->errcode = ext2fs_extent_replace(ehandle,
3269                                                                 0, &extent);
3270                                 if (pctx->errcode) {
3271                                         pctx->errcode = 0;
3272                                         goto alloc_later;
3273                                 }
3274                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3275                                 if (pctx->errcode)
3276                                         goto failed_add_dir_block;
3277                                 pctx->errcode = ext2fs_extent_goto(ehandle,
3278                                                                 extent.e_lblk);
3279                                 if (pctx->errcode)
3280                                         goto failed_add_dir_block;
3281                                 last_lblk = extent.e_lblk + extent.e_len - 1;
3282                                 failed_csum = 0;
3283                         }
3284                 }
3285 alloc_later:
3286                 if (is_dir) {
3287                         while (++pb->last_db_block <
3288                                (e2_blkcnt_t) extent.e_lblk) {
3289                                 pctx->errcode = ext2fs_add_dir_block2(
3290                                                         ctx->fs->dblist,
3291                                                         pb->ino, 0,
3292                                                         pb->last_db_block);
3293                                 if (pctx->errcode) {
3294                                         pctx->blk = 0;
3295                                         pctx->num = pb->last_db_block;
3296                                         goto failed_add_dir_block;
3297                                 }
3298                         }
3299
3300                         for (i = 0; i < extent.e_len; i++) {
3301                                 pctx->errcode = ext2fs_add_dir_block2(
3302                                                         ctx->fs->dblist,
3303                                                         pctx->ino,
3304                                                         extent.e_pblk + i,
3305                                                         extent.e_lblk + i);
3306                                 if (pctx->errcode) {
3307                                         pctx->blk = extent.e_pblk + i;
3308                                         pctx->num = extent.e_lblk + i;
3309                                 failed_add_dir_block:
3310                                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3311                                         /* Should never get here */
3312                                         ctx->flags |= E2F_FLAG_ABORT;
3313                                         return;
3314                                 }
3315                         }
3316                         if (extent.e_len > 0)
3317                                 pb->last_db_block = extent.e_lblk + extent.e_len - 1;
3318                 }
3319                 if (has_unaligned_cluster_map(ctx, pb->previous_block,
3320                                               pb->last_block,
3321                                               extent.e_pblk,
3322                                               extent.e_lblk)) {
3323                         for (i = 0; i < extent.e_len; i++) {
3324                                 pctx->blk = extent.e_lblk + i;
3325                                 pctx->blk2 = extent.e_pblk + i;
3326                                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3327                                 mark_block_used(ctx, extent.e_pblk + i);
3328                                 mark_block_used(ctx, extent.e_pblk + i);
3329                         }
3330                 }
3331
3332                 /*
3333                  * Check whether first cluster got marked in previous iteration.
3334                  */
3335                 if (ctx->fs->cluster_ratio_bits &&
3336                     pb->previous_block &&
3337                     (EXT2FS_B2C(ctx->fs, extent.e_pblk) ==
3338                      EXT2FS_B2C(ctx->fs, pb->previous_block)))
3339                         /* Set blk to the beginning of next cluster. */
3340                         blk = EXT2FS_C2B(
3341                                 ctx->fs,
3342                                 EXT2FS_B2C(ctx->fs, extent.e_pblk) + 1);
3343                 else
3344                         /* Set blk to the beginning of current cluster. */
3345                         blk = EXT2FS_C2B(ctx->fs,
3346                                          EXT2FS_B2C(ctx->fs, extent.e_pblk));
3347
3348                 if (blk < extent.e_pblk + extent.e_len) {
3349                         mark_blocks_used(ctx, blk,
3350                                          extent.e_pblk + extent.e_len - blk);
3351                         n = DIV_ROUND_UP(extent.e_pblk + extent.e_len - blk,
3352                                          EXT2FS_CLUSTER_RATIO(ctx->fs));
3353                         pb->num_blocks += n;
3354                 }
3355                 pb->last_block = extent.e_lblk + extent.e_len - 1;
3356                 pb->previous_block = extent.e_pblk + extent.e_len - 1;
3357                 start_block = pb->last_block = last_lblk;
3358                 if (is_leaf && !is_dir &&
3359                     !(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT))
3360                         pb->last_init_lblock = last_lblk;
3361         next:
3362                 pctx->errcode = ext2fs_extent_get(ehandle,
3363                                                   EXT2_EXTENT_NEXT_SIB,
3364                                                   &extent);
3365         }
3366
3367         /* Failed csum but passes checks?  Ask to fix checksum. */
3368         if (failed_csum &&
3369             fix_problem(ctx, PR_1_EXTENT_ONLY_CSUM_INVALID, pctx)) {
3370                 pb->inode_modified = 1;
3371                 pctx->errcode = ext2fs_extent_replace(ehandle, 0, &extent);
3372                 if (pctx->errcode)
3373                         return;
3374         }
3375
3376         if (pctx->errcode == EXT2_ET_EXTENT_NO_NEXT)
3377                 pctx->errcode = 0;
3378 }
3379
3380 static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx,
3381                                  struct process_block_struct *pb)
3382 {
3383         struct ext2_extent_info info;
3384         struct ext2_inode       *inode = pctx->inode;
3385         ext2_extent_handle_t    ehandle;
3386         ext2_filsys             fs = ctx->fs;
3387         ext2_ino_t              ino = pctx->ino;
3388         errcode_t               retval;
3389         blk64_t                 eof_lblk;
3390         struct ext3_extent_header       *eh;
3391
3392         /* Check for a proper extent header... */
3393         eh = (struct ext3_extent_header *) &inode->i_block[0];
3394         retval = ext2fs_extent_header_verify(eh, sizeof(inode->i_block));
3395         if (retval) {
3396                 if (fix_problem(ctx, PR_1_MISSING_EXTENT_HEADER, pctx))
3397                         e2fsck_clear_inode(ctx, ino, inode, 0,
3398                                            "check_blocks_extents");
3399                 pctx->errcode = 0;
3400                 return;
3401         }
3402
3403         /* ...since this function doesn't fail if i_block is zeroed. */
3404         pctx->errcode = ext2fs_extent_open2(fs, ino, inode, &ehandle);
3405         if (pctx->errcode) {
3406                 if (fix_problem(ctx, PR_1_READ_EXTENT, pctx))
3407                         e2fsck_clear_inode(ctx, ino, inode, 0,
3408                                            "check_blocks_extents");
3409                 pctx->errcode = 0;
3410                 return;
3411         }
3412
3413         retval = ext2fs_extent_get_info(ehandle, &info);
3414         if (retval == 0) {
3415                 int max_depth = info.max_depth;
3416
3417                 if (max_depth >= MAX_EXTENT_DEPTH_COUNT)
3418                         max_depth = MAX_EXTENT_DEPTH_COUNT-1;
3419                 ctx->extent_depth_count[max_depth]++;
3420         }
3421
3422         /* Check maximum extent depth */
3423         pctx->blk = info.max_depth;
3424         pctx->blk2 = ext2fs_max_extent_depth(ehandle);
3425         if (pctx->blk2 < pctx->blk &&
3426             fix_problem(ctx, PR_1_EXTENT_BAD_MAX_DEPTH, pctx))
3427                 pb->eti.force_rebuild = 1;
3428
3429         /* Can we collect extent tree level stats? */
3430         pctx->blk = MAX_EXTENT_DEPTH_COUNT;
3431         if (pctx->blk2 > pctx->blk)
3432                 fix_problem(ctx, PR_1E_MAX_EXTENT_TREE_DEPTH, pctx);
3433         memset(pb->eti.ext_info, 0, sizeof(pb->eti.ext_info));
3434         pb->eti.ino = pb->ino;
3435
3436         pb->next_lblock = 0;
3437
3438         eof_lblk = ((EXT2_I_SIZE(inode) + fs->blocksize - 1) >>
3439                 EXT2_BLOCK_SIZE_BITS(fs->super)) - 1;
3440         scan_extent_node(ctx, pctx, pb, 0, 0, eof_lblk, ehandle, 1);
3441         if (pctx->errcode &&
3442             fix_problem(ctx, PR_1_EXTENT_ITERATE_FAILURE, pctx)) {
3443                 pb->num_blocks = 0;
3444                 inode->i_blocks = 0;
3445                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3446                                    "check_blocks_extents");
3447                 pctx->errcode = 0;
3448         }
3449         ext2fs_extent_free(ehandle);
3450
3451         /* Rebuild unless it's a dir and we're rehashing it */
3452         if (LINUX_S_ISDIR(inode->i_mode) &&
3453             e2fsck_dir_will_be_rehashed(ctx, ino))
3454                 return;
3455
3456         if (ctx->options & E2F_OPT_CONVERT_BMAP)
3457                 e2fsck_rebuild_extents_later(ctx, ino);
3458         else
3459                 e2fsck_should_rebuild_extents(ctx, pctx, &pb->eti, &info);
3460 }
3461
3462 /*
3463  * In fact we don't need to check blocks for an inode with inline data
3464  * because this inode doesn't have any blocks.  In this function all
3465  * we need to do is add this inode into dblist when it is a directory.
3466  */
3467 static void check_blocks_inline_data(e2fsck_t ctx, struct problem_context *pctx,
3468                                      struct process_block_struct *pb)
3469 {
3470         int     flags;
3471         size_t  inline_data_size = 0;
3472
3473         if (!pb->is_dir) {
3474                 pctx->errcode = 0;
3475                 return;
3476         }
3477
3478         /* Process the dirents in i_block[] as the "first" block. */
3479         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 0);
3480         if (pctx->errcode)
3481                 goto err;
3482
3483         /* Process the dirents in the EA as a "second" block. */
3484         flags = ctx->fs->flags;
3485         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3486         pctx->errcode = ext2fs_inline_data_size(ctx->fs, pb->ino,
3487                                                 &inline_data_size);
3488         ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3489                          (ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3490         if (pctx->errcode) {
3491                 pctx->errcode = 0;
3492                 return;
3493         }
3494
3495         if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE)
3496                 return;
3497
3498         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 1);
3499         if (pctx->errcode)
3500                 goto err;
3501
3502         return;
3503 err:
3504         pctx->blk = 0;
3505         pctx->num = 0;
3506         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3507         ctx->flags |= E2F_FLAG_ABORT;
3508 }
3509
3510 /*
3511  * This subroutine is called on each inode to account for all of the
3512  * blocks used by that inode.
3513  */
3514 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
3515                          char *block_buf, const struct ea_quota *ea_ibody_quota)
3516 {
3517         ext2_filsys fs = ctx->fs;
3518         struct process_block_struct pb;
3519         ext2_ino_t      ino = pctx->ino;
3520         struct ext2_inode *inode = pctx->inode;
3521         unsigned        bad_size = 0;
3522         int             dirty_inode = 0;
3523         int             extent_fs;
3524         int             inlinedata_fs;
3525         __u64           size;
3526         struct ea_quota ea_block_quota;
3527
3528         pb.ino = ino;
3529         pb.num_blocks = EXT2FS_B2C(ctx->fs,
3530                                    ea_ibody_quota ? ea_ibody_quota->blocks : 0);
3531         pb.last_block = ~0;
3532         pb.last_init_lblock = -1;
3533         pb.last_db_block = -1;
3534         pb.num_illegal_blocks = 0;
3535         pb.suppress = 0; pb.clear = 0;
3536         pb.fragmented = 0;
3537         pb.compressed = 0;
3538         pb.previous_block = 0;
3539         pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
3540         pb.is_reg = LINUX_S_ISREG(inode->i_mode);
3541         pb.max_blocks = 1U << (31 - fs->super->s_log_block_size);
3542         pb.inode = inode;
3543         pb.pctx = pctx;
3544         pb.ctx = ctx;
3545         pb.inode_modified = 0;
3546         pb.eti.force_rebuild = 0;
3547         pctx->ino = ino;
3548         pctx->errcode = 0;
3549
3550         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
3551         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
3552
3553         if (check_ext_attr(ctx, pctx, block_buf, &ea_block_quota)) {
3554                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3555                         goto out;
3556                 pb.num_blocks += EXT2FS_B2C(ctx->fs, ea_block_quota.blocks);
3557         }
3558
3559         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL))
3560                 check_blocks_inline_data(ctx, pctx, &pb);
3561         else if (ext2fs_inode_has_valid_blocks2(fs, inode)) {
3562                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL))
3563                         check_blocks_extents(ctx, pctx, &pb);
3564                 else {
3565                         int flags;
3566                         /*
3567                          * If we've modified the inode, write it out before
3568                          * iterate() tries to use it.
3569                          */
3570                         if (dirty_inode) {
3571                                 e2fsck_write_inode(ctx, ino, inode,
3572                                                    "check_blocks");
3573                                 dirty_inode = 0;
3574                         }
3575                         flags = fs->flags;
3576                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3577                         pctx->errcode = ext2fs_block_iterate3(fs, ino,
3578                                                 pb.is_dir ? BLOCK_FLAG_HOLE : 0,
3579                                                 block_buf, process_block, &pb);
3580                         /*
3581                          * We do not have uninitialized extents in non extent
3582                          * files.
3583                          */
3584                         pb.last_init_lblock = pb.last_block;
3585                         /*
3586                          * If iterate() changed a block mapping, we have to
3587                          * re-read the inode.  If we decide to clear the
3588                          * inode after clearing some stuff, we'll re-write the
3589                          * bad mappings into the inode!
3590                          */
3591                         if (pb.inode_modified)
3592                                 e2fsck_read_inode(ctx, ino, inode,
3593                                                   "check_blocks");
3594                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3595                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3596
3597                         if (ctx->options & E2F_OPT_CONVERT_BMAP) {
3598 #ifdef DEBUG
3599                                 printf("bmap rebuild ino=%d\n", ino);
3600 #endif
3601                                 if (!LINUX_S_ISDIR(inode->i_mode) ||
3602                                     !e2fsck_dir_will_be_rehashed(ctx, ino))
3603                                         e2fsck_rebuild_extents_later(ctx, ino);
3604                         }
3605                 }
3606         }
3607         end_problem_latch(ctx, PR_LATCH_BLOCK);
3608         end_problem_latch(ctx, PR_LATCH_TOOBIG);
3609         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3610                 goto out;
3611         if (pctx->errcode)
3612                 fix_problem(ctx, PR_1_BLOCK_ITERATE, pctx);
3613
3614         if (pb.fragmented && pb.num_blocks < fs->super->s_blocks_per_group) {
3615                 if (LINUX_S_ISDIR(inode->i_mode))
3616                         ctx->fs_fragmented_dir++;
3617                 else
3618                         ctx->fs_fragmented++;
3619         }
3620
3621         if (pb.clear) {
3622                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3623                                    "check_blocks");
3624                 return;
3625         }
3626
3627         if (inode->i_flags & EXT2_INDEX_FL) {
3628                 if (handle_htree(ctx, pctx, ino, inode, block_buf)) {
3629                         inode->i_flags &= ~EXT2_INDEX_FL;
3630                         dirty_inode++;
3631                 } else {
3632                         e2fsck_add_dx_dir(ctx, ino, pb.last_block+1);
3633                 }
3634         }
3635
3636         if (!pb.num_blocks && pb.is_dir &&
3637             !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
3638                 /*
3639                  * The mode might be in-correct. Increasing the badness by
3640                  * small amount won't hurt much.
3641                  */
3642                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
3643                 if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) {
3644                         e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks");
3645                         ctx->fs_directory_count--;
3646                         return;
3647                 }
3648         }
3649
3650         if (ino != quota_type2inum(PRJQUOTA, fs->super) &&
3651             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super)) &&
3652             !(inode->i_flags & EXT4_EA_INODE_FL)) {
3653                 quota_data_add(ctx->qctx, (struct ext2_inode_large *) inode,
3654                                ino,
3655                                pb.num_blocks * EXT2_CLUSTER_SIZE(fs->super));
3656                 quota_data_inodes(ctx->qctx, (struct ext2_inode_large *) inode,
3657                                   ino, (ea_ibody_quota ?
3658                                         ea_ibody_quota->inodes : 0) +
3659                                                 ea_block_quota.inodes + 1);
3660         }
3661
3662         if (!ext2fs_has_feature_huge_file(fs->super) ||
3663             !(inode->i_flags & EXT4_HUGE_FILE_FL))
3664                 pb.num_blocks *= (fs->blocksize / 512);
3665         pb.num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
3666 #if 0
3667         printf("inode %u, i_size = %u, last_block = %llu, i_blocks=%llu, num_blocks = %llu\n",
3668                ino, inode->i_size, pb.last_block, ext2fs_inode_i_blocks(fs, inode),
3669                pb.num_blocks);
3670 #endif
3671         if (pb.is_dir) {
3672                 unsigned nblock = inode->i_size >> EXT2_BLOCK_SIZE_BITS(fs->super);
3673                 if (inode->i_flags & EXT4_INLINE_DATA_FL) {
3674                         int flags;
3675                         size_t sz = 0;
3676                         errcode_t err;
3677
3678                         flags = ctx->fs->flags;
3679                         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3680                         err = ext2fs_inline_data_size(ctx->fs, pctx->ino,
3681                                                       &sz);
3682                         ctx->fs->flags = (flags &
3683                                           EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3684                                          (ctx->fs->flags &
3685                                           ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3686                         if (err || sz != inode->i_size) {
3687                                 bad_size = 7;
3688                                 pctx->num = sz;
3689                         }
3690                 } else if (inode->i_size & (fs->blocksize - 1))
3691                         bad_size = 5;
3692                 else if (nblock > (pb.last_block + 1))
3693                         bad_size = 1;
3694                 else if (nblock < (pb.last_block + 1)) {
3695                         if (((pb.last_block + 1) - nblock) >
3696                             fs->super->s_prealloc_dir_blocks)
3697                                 bad_size = 2;
3698                 }
3699         } else {
3700                 e2_blkcnt_t blkpg = ctx->blocks_per_page;
3701
3702                 size = EXT2_I_SIZE(inode);
3703                 if ((pb.last_init_lblock >= 0) &&
3704                     /* Do not allow initialized allocated blocks past i_size*/
3705                     (size < (__u64)pb.last_init_lblock * fs->blocksize))
3706                         bad_size = 3;
3707                 else if (!(extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3708                          size > ext2_max_sizes[fs->super->s_log_block_size])
3709                         /* too big for a direct/indirect-mapped file */
3710                         bad_size = 4;
3711                 else if ((extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3712                          size >
3713                          ((1ULL << (32 + EXT2_BLOCK_SIZE_BITS(fs->super))) - 1))
3714                         /* too big for an extent-based file - 32bit ee_block */
3715                         bad_size = 6;
3716         }
3717         /* i_size for symlinks is checked elsewhere */
3718         if (bad_size && !LINUX_S_ISLNK(inode->i_mode)) {
3719                 /* Did inline_data set pctx->num earlier? */
3720                 if (bad_size != 7)
3721                         pctx->num = (pb.last_block + 1) * fs->blocksize;
3722                 pctx->group = bad_size;
3723                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
3724                 if (fix_problem(ctx, PR_1_BAD_I_SIZE, pctx)) {
3725                         if (LINUX_S_ISDIR(inode->i_mode))
3726                                 pctx->num &= 0xFFFFFFFFULL;
3727                         ext2fs_inode_size_set(fs, inode, pctx->num);
3728                         if (EXT2_I_SIZE(inode) == 0 &&
3729                             (inode->i_flags & EXT4_INLINE_DATA_FL)) {
3730                                 memset(inode->i_block, 0,
3731                                        sizeof(inode->i_block));
3732                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
3733                         }
3734                         dirty_inode++;
3735                 }
3736                 pctx->num = 0;
3737         }
3738         if (LINUX_S_ISREG(inode->i_mode) &&
3739             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
3740                 ctx->large_files++;
3741         if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
3742             ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) ||
3743              (ext2fs_has_feature_huge_file(fs->super) &&
3744               (inode->i_flags & EXT4_HUGE_FILE_FL) &&
3745               (inode->osd2.linux2.l_i_blocks_hi != 0)))) {
3746                 pctx->num = pb.num_blocks;
3747                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
3748                 if (fix_problem(ctx, PR_1_BAD_I_BLOCKS, pctx)) {
3749                         inode->i_blocks = pb.num_blocks;
3750                         inode->osd2.linux2.l_i_blocks_hi = pb.num_blocks >> 32;
3751                         dirty_inode++;
3752                 }
3753                 pctx->num = 0;
3754         }
3755
3756         /*
3757          * The kernel gets mad if we ask it to allocate bigalloc clusters to
3758          * a block mapped file, so rebuild it as an extent file.  We can skip
3759          * symlinks because they're never rewritten.
3760          */
3761         if (ext2fs_has_feature_bigalloc(fs->super) &&
3762             (LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode)) &&
3763             ext2fs_inode_data_blocks2(fs, inode) > 0 &&
3764             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INO(fs->super)) &&
3765             !(inode->i_flags & (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)) &&
3766             fix_problem(ctx, PR_1_NO_BIGALLOC_BLOCKMAP_FILES, pctx)) {
3767                 pctx->errcode = e2fsck_rebuild_extents_later(ctx, ino);
3768                 if (pctx->errcode)
3769                         goto out;
3770         }
3771
3772         if (ctx->dirs_to_hash && pb.is_dir &&
3773             !(ctx->lost_and_found && ctx->lost_and_found == ino) &&
3774             !(inode->i_flags & EXT2_INDEX_FL) &&
3775             ((inode->i_size / fs->blocksize) >= 3))
3776                 e2fsck_rehash_dir_later(ctx, ino);
3777
3778 out:
3779         if (dirty_inode)
3780                 e2fsck_write_inode(ctx, ino, inode, "check_blocks");
3781 }
3782
3783 #if 0
3784 /*
3785  * Helper function called by process block when an illegal block is
3786  * found.  It returns a description about why the block is illegal
3787  */
3788 static char *describe_illegal_block(ext2_filsys fs, blk64_t block)
3789 {
3790         blk64_t super;
3791         int     i;
3792         static char     problem[80];
3793
3794         super = fs->super->s_first_data_block;
3795         strcpy(problem, "PROGRAMMING ERROR: Unknown reason for illegal block");
3796         if (block < super) {
3797                 sprintf(problem, "< FIRSTBLOCK (%u)", super);
3798                 return(problem);
3799         } else if (block >= ext2fs_blocks_count(fs->super)) {
3800                 sprintf(problem, "> BLOCKS (%u)", ext2fs_blocks_count(fs->super));
3801                 return(problem);
3802         }
3803         for (i = 0; i < fs->group_desc_count; i++) {
3804                 if (block == super) {
3805                         sprintf(problem, "is the superblock in group %d", i);
3806                         break;
3807                 }
3808                 if (block > super &&
3809                     block <= (super + fs->desc_blocks)) {
3810                         sprintf(problem, "is in the group descriptors "
3811                                 "of group %d", i);
3812                         break;
3813                 }
3814                 if (block == ext2fs_block_bitmap_loc(fs, i)) {
3815                         sprintf(problem, "is the block bitmap of group %d", i);
3816                         break;
3817                 }
3818                 if (block == ext2fs_inode_bitmap_loc(fs, i)) {
3819                         sprintf(problem, "is the inode bitmap of group %d", i);
3820                         break;
3821                 }
3822                 if (block >= ext2fs_inode_table_loc(fs, i) &&
3823                     (block < ext2fs_inode_table_loc(fs, i)
3824                      + fs->inode_blocks_per_group)) {
3825                         sprintf(problem, "is in the inode table of group %d",
3826                                 i);
3827                         break;
3828                 }
3829                 super += fs->super->s_blocks_per_group;
3830         }
3831         return(problem);
3832 }
3833 #endif
3834
3835 /*
3836  * This is a helper function for check_blocks().
3837  */
3838 static int process_block(ext2_filsys fs,
3839                   blk64_t       *block_nr,
3840                   e2_blkcnt_t blockcnt,
3841                   blk64_t ref_block EXT2FS_ATTR((unused)),
3842                   int ref_offset EXT2FS_ATTR((unused)),
3843                   void *priv_data)
3844 {
3845         struct process_block_struct *p;
3846         struct problem_context *pctx;
3847         blk64_t blk = *block_nr;
3848         int     ret_code = 0;
3849         problem_t       problem = 0;
3850         e2fsck_t        ctx;
3851
3852         p = (struct process_block_struct *) priv_data;
3853         pctx = p->pctx;
3854         ctx = p->ctx;
3855
3856         /*
3857          * For a directory, add logical block zero for processing even if it's
3858          * not mapped or we'll be perennially stuck with broken "." and ".."
3859          * entries.
3860          */
3861         if (p->is_dir && blockcnt == 0 && blk == 0) {
3862                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino, 0, 0);
3863                 if (pctx->errcode) {
3864                         pctx->blk = blk;
3865                         pctx->num = blockcnt;
3866                         goto failed_add_dir_block;
3867                 }
3868                 p->last_db_block++;
3869         }
3870
3871         if (blk == 0)
3872                 return 0;
3873
3874 #if 0
3875         printf("Process_block, inode %lu, block %u, #%d\n", p->ino, blk,
3876                blockcnt);
3877 #endif
3878
3879         /*
3880          * Simplistic fragmentation check.  We merely require that the
3881          * file be contiguous.  (Which can never be true for really
3882          * big files that are greater than a block group.)
3883          */
3884         if (p->previous_block && p->ino != EXT2_RESIZE_INO) {
3885                 if (p->previous_block+1 != blk) {
3886                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3887                                 char type = '?';
3888
3889                                 if (p->is_dir)
3890                                         type = 'd';
3891                                 else if (p->is_reg)
3892                                         type = 'f';
3893
3894                                 printf(_("%6lu(%c): expecting %6lu "
3895                                          "got phys %6lu (blkcnt %lld)\n"),
3896                                        (unsigned long) pctx->ino, type,
3897                                        (unsigned long) p->previous_block+1,
3898                                        (unsigned long) blk,
3899                                        blockcnt);
3900                         }
3901                         p->fragmented = 1;
3902                 }
3903         }
3904
3905         if (p->is_dir && blockcnt > (1 << (21 - fs->super->s_log_block_size)))
3906                 problem = PR_1_TOOBIG_DIR;
3907         if (p->is_reg && p->num_blocks+1 >= p->max_blocks)
3908                 problem = PR_1_TOOBIG_REG;
3909         if (!p->is_dir && !p->is_reg && blockcnt > 0)
3910                 problem = PR_1_TOOBIG_SYMLINK;
3911
3912         if (blk < fs->super->s_first_data_block ||
3913             blk >= ext2fs_blocks_count(fs->super)) {
3914                 problem = PR_1_ILLEGAL_BLOCK_NUM;
3915                 e2fsck_mark_inode_bad(ctx, pctx->ino, BADNESS_NORMAL);
3916         }
3917
3918         /*
3919          * If this IND/DIND/TIND block is squatting atop some critical metadata
3920          * (group descriptors, superblock, bitmap, inode table), any write to
3921          * "fix" mapping problems will destroy the metadata.  We'll let pass 1b
3922          * fix that and restart fsck.
3923          */
3924         if (blockcnt < 0 &&
3925             p->ino != EXT2_RESIZE_INO &&
3926             blk < ctx->fs->super->s_blocks_count &&
3927             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk)) {
3928                 pctx->blk = blk;
3929                 fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx);
3930                 if ((ctx->options & E2F_OPT_NO) == 0)
3931                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3932         }
3933
3934         if (problem) {
3935                 p->num_illegal_blocks++;
3936                 /*
3937                  * A bit of subterfuge here -- we're trying to fix a block
3938                  * mapping, but the IND/DIND/TIND block could have collided
3939                  * with some critical metadata.  So, fix the in-core mapping so
3940                  * iterate won't go insane, but return 0 instead of
3941                  * BLOCK_CHANGED so that it won't write the remapping out to
3942                  * our multiply linked block.
3943                  *
3944                  * Even if we previously determined that an *IND block
3945                  * conflicts with critical metadata, we must still try to
3946                  * iterate the *IND block as if it is an *IND block to find and
3947                  * mark the blocks it points to.  Better to be overly cautious
3948                  * with the used_blocks map so that we don't move the *IND
3949                  * block to a block that's really in use!
3950                  */
3951                 if (p->ino != EXT2_RESIZE_INO &&
3952                     ref_block != 0 &&
3953                     ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3954                                               ref_block)) {
3955                         *block_nr = 0;
3956                         return 0;
3957                 }
3958                 if (!p->suppress && (p->num_illegal_blocks % 12) == 0) {
3959                         if (fix_problem(ctx, PR_1_TOO_MANY_BAD_BLOCKS, pctx)) {
3960                                 p->clear = 1;
3961                                 return BLOCK_ABORT;
3962                         }
3963                         if (fix_problem(ctx, PR_1_SUPPRESS_MESSAGES, pctx)) {
3964                                 p->suppress = 1;
3965                                 set_latch_flags(PR_LATCH_BLOCK,
3966                                                 PRL_SUPPRESS, 0);
3967                         }
3968                 }
3969                 pctx->blk = blk;
3970                 pctx->blkcount = blockcnt;
3971                 if (fix_problem(ctx, problem, pctx)) {
3972                         blk = *block_nr = 0;
3973                         ret_code = BLOCK_CHANGED;
3974                         p->inode_modified = 1;
3975                         /*
3976                          * If the directory block is too big and is beyond the
3977                          * end of the FS, don't bother trying to add it for
3978                          * processing -- the kernel would never have created a
3979                          * directory this large, and we risk an ENOMEM abort.
3980                          * In any case, the toobig handler for extent-based
3981                          * directories also doesn't feed toobig blocks to
3982                          * pass 2.
3983                          */
3984                         if (problem == PR_1_TOOBIG_DIR)
3985                                 return ret_code;
3986                         goto mark_dir;
3987                 } else
3988                         return 0;
3989         }
3990
3991         if (p->ino == EXT2_RESIZE_INO) {
3992                 /*
3993                  * The resize inode has already be sanity checked
3994                  * during pass #0 (the superblock checks).  All we
3995                  * have to do is mark the double indirect block as
3996                  * being in use; all of the other blocks are handled
3997                  * by mark_table_blocks()).
3998                  */
3999                 if (blockcnt == BLOCK_COUNT_DIND)
4000                         mark_block_used(ctx, blk);
4001                 p->num_blocks++;
4002         } else if (!(ctx->fs->cluster_ratio_bits &&
4003                      p->previous_block &&
4004                      (EXT2FS_B2C(ctx->fs, blk) ==
4005                       EXT2FS_B2C(ctx->fs, p->previous_block)) &&
4006                      (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
4007                      ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
4008                 mark_block_used(ctx, blk);
4009                 p->num_blocks++;
4010         } else if (has_unaligned_cluster_map(ctx, p->previous_block,
4011                                              p->last_block, blk, blockcnt)) {
4012                 pctx->blk = blockcnt;
4013                 pctx->blk2 = blk;
4014                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
4015                 mark_block_used(ctx, blk);
4016                 mark_block_used(ctx, blk);
4017         }
4018         if (blockcnt >= 0)
4019                 p->last_block = blockcnt;
4020         p->previous_block = blk;
4021 mark_dir:
4022         if (p->is_dir && (blockcnt >= 0)) {
4023                 while (++p->last_db_block < blockcnt) {
4024                         pctx->errcode = ext2fs_add_dir_block2(fs->dblist,
4025                                                               p->ino, 0,
4026                                                               p->last_db_block);
4027                         if (pctx->errcode) {
4028                                 pctx->blk = 0;
4029                                 pctx->num = p->last_db_block;
4030                                 goto failed_add_dir_block;
4031                         }
4032                 }
4033                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino,
4034                                                       blk, blockcnt);
4035                 if (pctx->errcode) {
4036                         pctx->blk = blk;
4037                         pctx->num = blockcnt;
4038                 failed_add_dir_block:
4039                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
4040                         /* Should never get here */
4041                         ctx->flags |= E2F_FLAG_ABORT;
4042                         return BLOCK_ABORT;
4043                 }
4044         }
4045         return ret_code;
4046 }
4047
4048 static int process_bad_block(ext2_filsys fs,
4049                       blk64_t *block_nr,
4050                       e2_blkcnt_t blockcnt,
4051                       blk64_t ref_block EXT2FS_ATTR((unused)),
4052                       int ref_offset EXT2FS_ATTR((unused)),
4053                       void *priv_data)
4054 {
4055         struct process_block_struct *p;
4056         blk64_t         blk = *block_nr;
4057         blk64_t         first_block;
4058         dgrp_t          i;
4059         struct problem_context *pctx;
4060         e2fsck_t        ctx;
4061
4062         if (!blk)
4063                 return 0;
4064
4065         p = (struct process_block_struct *) priv_data;
4066         ctx = p->ctx;
4067         pctx = p->pctx;
4068
4069         pctx->ino = EXT2_BAD_INO;
4070         pctx->blk = blk;
4071         pctx->blkcount = blockcnt;
4072
4073         if ((blk < fs->super->s_first_data_block) ||
4074             (blk >= ext2fs_blocks_count(fs->super))) {
4075                 if (fix_problem(ctx, PR_1_BB_ILLEGAL_BLOCK_NUM, pctx)) {
4076                         *block_nr = 0;
4077                         return BLOCK_CHANGED;
4078                 } else
4079                         return 0;
4080         }
4081
4082         if (blockcnt < 0) {
4083                 if (ext2fs_test_block_bitmap2(p->fs_meta_blocks, blk)) {
4084                         p->bbcheck = 1;
4085                         if (fix_problem(ctx, PR_1_BB_FS_BLOCK, pctx)) {
4086                                 *block_nr = 0;
4087                                 return BLOCK_CHANGED;
4088                         }
4089                 } else if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4090                                                     blk)) {
4091                         p->bbcheck = 1;
4092                         if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK,
4093                                         pctx)) {
4094                                 *block_nr = 0;
4095                                 return BLOCK_CHANGED;
4096                         }
4097                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
4098                                 return BLOCK_ABORT;
4099                 } else
4100                         mark_block_used(ctx, blk);
4101                 return 0;
4102         }
4103 #if 0
4104         printf ("DEBUG: Marking %u as bad.\n", blk);
4105 #endif
4106         ctx->fs_badblocks_count++;
4107         /*
4108          * If the block is not used, then mark it as used and return.
4109          * If it is already marked as found, this must mean that
4110          * there's an overlap between the filesystem table blocks
4111          * (bitmaps and inode table) and the bad block list.
4112          */
4113         if (!ext2fs_test_block_bitmap2(ctx->block_found_map, blk)) {
4114                 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4115                 return 0;
4116         }
4117         /*
4118          * Try to find the where the filesystem block was used...
4119          */
4120         first_block = fs->super->s_first_data_block;
4121
4122         for (i = 0; i < fs->group_desc_count; i++ ) {
4123                 pctx->group = i;
4124                 pctx->blk = blk;
4125                 if (!ext2fs_bg_has_super(fs, i))
4126                         goto skip_super;
4127                 if (blk == first_block) {
4128                         if (i == 0) {
4129                                 if (fix_problem(ctx,
4130                                                 PR_1_BAD_PRIMARY_SUPERBLOCK,
4131                                                 pctx)) {
4132                                         *block_nr = 0;
4133                                         return BLOCK_CHANGED;
4134                                 }
4135                                 return 0;
4136                         }
4137                         fix_problem(ctx, PR_1_BAD_SUPERBLOCK, pctx);
4138                         return 0;
4139                 }
4140                 if ((blk > first_block) &&
4141                     (blk <= first_block + fs->desc_blocks)) {
4142                         if (i == 0) {
4143                                 pctx->blk = *block_nr;
4144                                 if (fix_problem(ctx,
4145                         PR_1_BAD_PRIMARY_GROUP_DESCRIPTOR, pctx)) {
4146                                         *block_nr = 0;
4147                                         return BLOCK_CHANGED;
4148                                 }
4149                                 return 0;
4150                         }
4151                         fix_problem(ctx, PR_1_BAD_GROUP_DESCRIPTORS, pctx);
4152                         return 0;
4153                 }
4154         skip_super:
4155                 if (blk == ext2fs_block_bitmap_loc(fs, i)) {
4156                         if (fix_problem(ctx, PR_1_BB_BAD_BLOCK, pctx)) {
4157                                 ctx->invalid_block_bitmap_flag[i]++;
4158                                 ctx->invalid_bitmaps++;
4159                         }
4160                         return 0;
4161                 }
4162                 if (blk == ext2fs_inode_bitmap_loc(fs, i)) {
4163                         if (fix_problem(ctx, PR_1_IB_BAD_BLOCK, pctx)) {
4164                                 ctx->invalid_inode_bitmap_flag[i]++;
4165                                 ctx->invalid_bitmaps++;
4166                         }
4167                         return 0;
4168                 }
4169                 if ((blk >= ext2fs_inode_table_loc(fs, i)) &&
4170                     (blk < (ext2fs_inode_table_loc(fs, i) +
4171                             fs->inode_blocks_per_group))) {
4172                         /*
4173                          * If there are bad blocks in the inode table,
4174                          * the inode scan code will try to do
4175                          * something reasonable automatically.
4176                          */
4177                         return 0;
4178                 }
4179                 first_block += fs->super->s_blocks_per_group;
4180         }
4181         /*
4182          * If we've gotten to this point, then the only
4183          * possibility is that the bad block inode meta data
4184          * is using a bad block.
4185          */
4186         if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) ||
4187             (blk == p->inode->i_block[EXT2_DIND_BLOCK]) ||
4188             (blk == p->inode->i_block[EXT2_TIND_BLOCK])) {
4189                 p->bbcheck = 1;
4190                 if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, pctx)) {
4191                         *block_nr = 0;
4192                         return BLOCK_CHANGED;
4193                 }
4194                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
4195                         return BLOCK_ABORT;
4196                 return 0;
4197         }
4198
4199         pctx->group = -1;
4200
4201         /* Warn user that the block wasn't claimed */
4202         fix_problem(ctx, PR_1_PROGERR_CLAIMED_BLOCK, pctx);
4203
4204         return 0;
4205 }
4206
4207 static void new_table_block(e2fsck_t ctx, blk64_t first_block, dgrp_t group,
4208                             const char *name, int num, blk64_t *new_block)
4209 {
4210         ext2_filsys fs = ctx->fs;
4211         dgrp_t          last_grp;
4212         blk64_t         old_block = *new_block;
4213         blk64_t         last_block;
4214         dgrp_t          flexbg;
4215         unsigned        flexbg_size;
4216         int             i, is_flexbg;
4217         char            *buf;
4218         struct problem_context  pctx;
4219
4220         clear_problem_context(&pctx);
4221
4222         pctx.group = group;
4223         pctx.blk = old_block;
4224         pctx.str = name;
4225
4226         /*
4227          * For flex_bg filesystems, first try to allocate the metadata
4228          * within the flex_bg, and if that fails then try finding the
4229          * space anywhere in the filesystem.
4230          */
4231         is_flexbg = ext2fs_has_feature_flex_bg(fs->super);
4232         if (is_flexbg) {
4233                 flexbg_size = 1 << fs->super->s_log_groups_per_flex;
4234                 flexbg = group / flexbg_size;
4235                 first_block = ext2fs_group_first_block2(fs,
4236                                                         flexbg_size * flexbg);
4237                 last_grp = group | (flexbg_size - 1);
4238                 if (last_grp >= fs->group_desc_count)
4239                         last_grp = fs->group_desc_count - 1;
4240                 last_block = ext2fs_group_last_block2(fs, last_grp);
4241         } else
4242                 last_block = ext2fs_group_last_block2(fs, group);
4243         pctx.errcode = ext2fs_get_free_blocks2(fs, first_block, last_block,
4244                                                num, ctx->block_found_map,
4245                                                new_block);
4246         if (is_flexbg && (pctx.errcode == EXT2_ET_BLOCK_ALLOC_FAIL))
4247                 pctx.errcode = ext2fs_get_free_blocks2(fs,
4248                                 fs->super->s_first_data_block,
4249                                 ext2fs_blocks_count(fs->super),
4250                                 num, ctx->block_found_map, new_block);
4251         if (pctx.errcode) {
4252                 pctx.num = num;
4253                 fix_problem(ctx, PR_1_RELOC_BLOCK_ALLOCATE, &pctx);
4254                 ext2fs_unmark_valid(fs);
4255                 ctx->flags |= E2F_FLAG_ABORT;
4256                 return;
4257         }
4258         pctx.errcode = ext2fs_get_mem(fs->blocksize, &buf);
4259         if (pctx.errcode) {
4260                 fix_problem(ctx, PR_1_RELOC_MEMORY_ALLOCATE, &pctx);
4261                 ext2fs_unmark_valid(fs);
4262                 ctx->flags |= E2F_FLAG_ABORT;
4263                 return;
4264         }
4265         ext2fs_mark_super_dirty(fs);
4266         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
4267         pctx.blk2 = *new_block;
4268         fix_problem(ctx, (old_block ? PR_1_RELOC_FROM_TO :
4269                           PR_1_RELOC_TO), &pctx);
4270         pctx.blk2 = 0;
4271         for (i = 0; i < num; i++) {
4272                 pctx.blk = i;
4273                 ext2fs_mark_block_bitmap2(ctx->block_found_map, (*new_block)+i);
4274                 if (old_block) {
4275                         pctx.errcode = io_channel_read_blk64(fs->io,
4276                                    old_block + i, 1, buf);
4277                         if (pctx.errcode)
4278                                 fix_problem(ctx, PR_1_RELOC_READ_ERR, &pctx);
4279                         pctx.blk = (*new_block) + i;
4280                         pctx.errcode = io_channel_write_blk64(fs->io, pctx.blk,
4281                                                               1, buf);
4282                 } else {
4283                         pctx.blk = (*new_block) + i;
4284                         pctx.errcode = ext2fs_zero_blocks2(fs, pctx.blk, 1,
4285                                                            NULL, NULL);
4286                 }
4287
4288                 if (pctx.errcode)
4289                         fix_problem(ctx, PR_1_RELOC_WRITE_ERR, &pctx);
4290         }
4291         ext2fs_free_mem(&buf);
4292 }
4293
4294 /*
4295  * This routine gets called at the end of pass 1 if bad blocks are
4296  * detected in the superblock, group descriptors, inode_bitmaps, or
4297  * block bitmaps.  At this point, all of the blocks have been mapped
4298  * out, so we can try to allocate new block(s) to replace the bad
4299  * blocks.
4300  */
4301 static void handle_fs_bad_blocks(e2fsck_t ctx)
4302 {
4303         ext2_filsys fs = ctx->fs;
4304         dgrp_t          i;
4305         blk64_t         first_block;
4306         blk64_t         new_blk;
4307
4308         for (i = 0; i < fs->group_desc_count; i++) {
4309                 first_block = ext2fs_group_first_block2(fs, i);
4310
4311                 if (ctx->invalid_block_bitmap_flag[i]) {
4312                         new_blk = ext2fs_block_bitmap_loc(fs, i);
4313                         new_table_block(ctx, first_block, i, _("block bitmap"),
4314                                         1, &new_blk);
4315                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
4316                 }
4317                 if (ctx->invalid_inode_bitmap_flag[i]) {
4318                         new_blk = ext2fs_inode_bitmap_loc(fs, i);
4319                         new_table_block(ctx, first_block, i, _("inode bitmap"),
4320                                         1, &new_blk);
4321                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
4322                 }
4323                 if (ctx->invalid_inode_table_flag[i]) {
4324                         new_blk = ext2fs_inode_table_loc(fs, i);
4325                         new_table_block(ctx, first_block, i, _("inode table"),
4326                                         fs->inode_blocks_per_group,
4327                                         &new_blk);
4328                         ext2fs_inode_table_loc_set(fs, i, new_blk);
4329                         ctx->flags |= E2F_FLAG_RESTART;
4330                 }
4331         }
4332         ctx->invalid_bitmaps = 0;
4333 }
4334
4335 /*
4336  * This routine marks all blocks which are used by the superblock,
4337  * group descriptors, inode bitmaps, and block bitmaps.
4338  */
4339 static void mark_table_blocks(e2fsck_t ctx)
4340 {
4341         ext2_filsys fs = ctx->fs;
4342         blk64_t b;
4343         dgrp_t  i;
4344         unsigned int    j;
4345         struct problem_context pctx;
4346
4347         clear_problem_context(&pctx);
4348
4349         for (i = 0; i < fs->group_desc_count; i++) {
4350                 pctx.group = i;
4351
4352                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_found_map);
4353                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_metadata_map);
4354
4355                 /*
4356                  * Mark the blocks used for the inode table
4357                  */
4358                 if (ext2fs_inode_table_loc(fs, i)) {
4359                         for (j = 0, b = ext2fs_inode_table_loc(fs, i);
4360                              j < fs->inode_blocks_per_group;
4361                              j++, b++) {
4362                                 if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4363                                                              b)) {
4364                                         pctx.blk = b;
4365                                         if (!ctx->invalid_inode_table_flag[i] &&
4366                                             fix_problem(ctx,
4367                                                 PR_1_ITABLE_CONFLICT, &pctx)) {
4368                                                 ctx->invalid_inode_table_flag[i]++;
4369                                                 ctx->invalid_bitmaps++;
4370                                         }
4371                                 } else {
4372                                     ext2fs_mark_block_bitmap2(
4373                                                 ctx->block_found_map, b);
4374                                     ext2fs_mark_block_bitmap2(
4375                                                 ctx->block_metadata_map, b);
4376                                 }
4377                         }
4378                 }
4379
4380                 /*
4381                  * Mark block used for the block bitmap
4382                  */
4383                 if (ext2fs_block_bitmap_loc(fs, i)) {
4384                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4385                                      ext2fs_block_bitmap_loc(fs, i))) {
4386                                 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
4387                                 if (fix_problem(ctx, PR_1_BB_CONFLICT, &pctx)) {
4388                                         ctx->invalid_block_bitmap_flag[i]++;
4389                                         ctx->invalid_bitmaps++;
4390                                 }
4391                         } else {
4392                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4393                                      ext2fs_block_bitmap_loc(fs, i));
4394                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4395                                      ext2fs_block_bitmap_loc(fs, i));
4396                         }
4397                 }
4398                 /*
4399                  * Mark block used for the inode bitmap
4400                  */
4401                 if (ext2fs_inode_bitmap_loc(fs, i)) {
4402                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4403                                      ext2fs_inode_bitmap_loc(fs, i))) {
4404                                 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
4405                                 if (fix_problem(ctx, PR_1_IB_CONFLICT, &pctx)) {
4406                                         ctx->invalid_inode_bitmap_flag[i]++;
4407                                         ctx->invalid_bitmaps++;
4408                                 }
4409                         } else {
4410                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4411                                      ext2fs_inode_bitmap_loc(fs, i));
4412                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4413                                      ext2fs_inode_bitmap_loc(fs, i));
4414                         }
4415                 }
4416         }
4417 }
4418
4419 /*
4420  * These subroutines short circuits ext2fs_get_blocks and
4421  * ext2fs_check_directory; we use them since we already have the inode
4422  * structure, so there's no point in letting the ext2fs library read
4423  * the inode again.
4424  */
4425 static errcode_t pass1_get_blocks(ext2_filsys fs, ext2_ino_t ino,
4426                                   blk_t *blocks)
4427 {
4428         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4429         int     i;
4430
4431         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4432                 return EXT2_ET_CALLBACK_NOTHANDLED;
4433
4434         for (i=0; i < EXT2_N_BLOCKS; i++)
4435                 blocks[i] = ctx->stashed_inode->i_block[i];
4436         return 0;
4437 }
4438
4439 static errcode_t pass1_read_inode(ext2_filsys fs, ext2_ino_t ino,
4440                                   struct ext2_inode *inode)
4441 {
4442         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4443
4444         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4445                 return EXT2_ET_CALLBACK_NOTHANDLED;
4446         *inode = *ctx->stashed_inode;
4447         return 0;
4448 }
4449
4450 static errcode_t pass1_write_inode(ext2_filsys fs, ext2_ino_t ino,
4451                             struct ext2_inode *inode)
4452 {
4453         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4454
4455         if ((ino == ctx->stashed_ino) && ctx->stashed_inode &&
4456                 (inode != ctx->stashed_inode))
4457                 *ctx->stashed_inode = *inode;
4458         return EXT2_ET_CALLBACK_NOTHANDLED;
4459 }
4460
4461 static errcode_t pass1_check_directory(ext2_filsys fs, ext2_ino_t ino)
4462 {
4463         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4464
4465         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4466                 return EXT2_ET_CALLBACK_NOTHANDLED;
4467
4468         if (!LINUX_S_ISDIR(ctx->stashed_inode->i_mode))
4469                 return EXT2_ET_NO_DIRECTORY;
4470         return 0;
4471 }
4472
4473 static errcode_t e2fsck_get_alloc_block(ext2_filsys fs, blk64_t goal,
4474                                         blk64_t *ret)
4475 {
4476         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4477         errcode_t       retval;
4478         blk64_t         new_block;
4479
4480         if (ctx->block_found_map) {
4481                 retval = ext2fs_new_block2(fs, goal, ctx->block_found_map,
4482                                            &new_block);
4483                 if (retval)
4484                         return retval;
4485                 if (fs->block_map) {
4486                         ext2fs_mark_block_bitmap2(fs->block_map, new_block);
4487                         ext2fs_mark_bb_dirty(fs);
4488                 }
4489         } else {
4490                 if (!fs->block_map) {
4491                         retval = ext2fs_read_block_bitmap(fs);
4492                         if (retval)
4493                                 return retval;
4494                 }
4495
4496                 retval = ext2fs_new_block2(fs, goal, fs->block_map, &new_block);
4497                 if (retval)
4498                         return retval;
4499         }
4500
4501         *ret = new_block;
4502         return (0);
4503 }
4504
4505 static errcode_t e2fsck_new_range(ext2_filsys fs, int flags, blk64_t goal,
4506                                   blk64_t len, blk64_t *pblk, blk64_t *plen)
4507 {
4508         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4509         errcode_t       retval;
4510
4511         if (ctx->block_found_map)
4512                 return ext2fs_new_range(fs, flags, goal, len,
4513                                         ctx->block_found_map, pblk, plen);
4514
4515         if (!fs->block_map) {
4516                 retval = ext2fs_read_block_bitmap(fs);
4517                 if (retval)
4518                         return retval;
4519         }
4520
4521         return ext2fs_new_range(fs, flags, goal, len, fs->block_map,
4522                                 pblk, plen);
4523 }
4524
4525 static void e2fsck_block_alloc_stats(ext2_filsys fs, blk64_t blk, int inuse)
4526 {
4527         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4528
4529         /* Never free a critical metadata block */
4530         if (ctx->block_found_map &&
4531             ctx->block_metadata_map &&
4532             inuse < 0 &&
4533             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk))
4534                 return;
4535
4536         if (ctx->block_found_map) {
4537                 if (inuse > 0)
4538                         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4539                 else
4540                         ext2fs_unmark_block_bitmap2(ctx->block_found_map, blk);
4541         }
4542 }
4543
4544 static void e2fsck_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
4545                                            blk_t num, int inuse)
4546 {
4547         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4548
4549         /* Never free a critical metadata block */
4550         if (ctx->block_found_map &&
4551             ctx->block_metadata_map &&
4552             inuse < 0 &&
4553             ext2fs_test_block_bitmap_range2(ctx->block_metadata_map, blk, num))
4554                 return;
4555
4556         if (ctx->block_found_map) {
4557                 if (inuse > 0)
4558                         ext2fs_mark_block_bitmap_range2(ctx->block_found_map,
4559                                                         blk, num);
4560                 else
4561                         ext2fs_unmark_block_bitmap_range2(ctx->block_found_map,
4562                                                         blk, num);
4563         }
4564 }
4565
4566 void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts)
4567 {
4568         ext2_filsys fs = ctx->fs;
4569
4570         if (use_shortcuts) {
4571                 fs->get_blocks = pass1_get_blocks;
4572                 fs->check_directory = pass1_check_directory;
4573                 fs->read_inode = pass1_read_inode;
4574                 fs->write_inode = pass1_write_inode;
4575                 ctx->stashed_ino = 0;
4576         } else {
4577                 fs->get_blocks = 0;
4578                 fs->check_directory = 0;
4579                 fs->read_inode = 0;
4580                 fs->write_inode = 0;
4581         }
4582 }
4583
4584 void e2fsck_intercept_block_allocations(e2fsck_t ctx)
4585 {
4586         ext2fs_set_alloc_block_callback(ctx->fs, e2fsck_get_alloc_block, 0);
4587         ext2fs_set_block_alloc_stats_callback(ctx->fs,
4588                                                 e2fsck_block_alloc_stats, 0);
4589         ext2fs_set_new_range_callback(ctx->fs, e2fsck_new_range, NULL);
4590         ext2fs_set_block_alloc_stats_range_callback(ctx->fs,
4591                                         e2fsck_block_alloc_stats_range, NULL);
4592 }