e2fsck/pass1.c

   1 /*
   2  * pass1.c -- pass #1 of e2fsck: sequential scan of the inode table
   3  *
   4  * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Public
   8  * License.
   9  * %End-Header%
  10  *
  11  * Pass 1 of e2fsck iterates over all the inodes in the filesystems,
  12  * and applies the following tests to each inode:
  13  *
  14  *      - The mode field of the inode must be legal.
  15  *      - The size and block count fields of the inode are correct.
  16  *      - A data block must not be used by another inode
  17  *
  18  * Pass 1 also gathers the collects the following information:
  19  *
  20  *      - A bitmap of which inodes are in use.          (inode_used_map)
  21  *      - A bitmap of which inodes are directories.     (inode_dir_map)
  22  *      - A bitmap of which inodes are regular files.   (inode_reg_map)
  23  *      - A bitmap of which inodes have bad fields.     (inode_bad_map)
  24  *      - A bitmap of which inodes are in bad blocks.   (inode_bb_map)
  25  *      - A bitmap of which inodes are imagic inodes.   (inode_imagic_map)
  26  *      - A bitmap of which inodes are casefolded.      (inode_casefold_map)
  27  *      - A bitmap of which blocks are in use.          (block_found_map)
  28  *      - A bitmap of which blocks are in use by two inodes     (block_dup_map)
  29  *      - The data blocks of the directory inodes.      (dir_map)
  30  *      - Ref counts for ea_inodes.                     (ea_inode_refs)
  31  *      - The encryption policy ID of each encrypted inode. (encrypted_files)
  32  *
  33  * Pass 1 is designed to stash away enough information so that the
  34  * other passes should not need to read in the inode information
  35  * during the normal course of a filesystem check.  (Although if an
  36  * inconsistency is detected, other passes may need to read in an
  37  * inode to fix it.)
  38  *
  39  * Note that pass 1B will be invoked if there are any duplicate blocks
  40  * found.
  41  */
  42
  43 #define _GNU_SOURCE 1 /* get strnlen() */
  44 #include "config.h"
  45 #include <string.h>
  46 #include <time.h>
  47 #ifdef HAVE_ERRNO_H
  48 #include <errno.h>
  49 #endif
  50
  51 #include "e2fsck.h"
  52 #include <ext2fs/ext2_ext_attr.h>
  53 #include <e2p/e2p.h>
  54
  55 #include "problem.h"
  56
  57 #ifdef NO_INLINE_FUNCS
  58 #define _INLINE_
  59 #else
  60 #define _INLINE_ inline
  61 #endif
  62
  63 #undef DEBUG
  64
  65 struct ea_quota {
  66         blk64_t blocks;
  67         __u64 inodes;
  68 };
  69
  70 static int process_block(ext2_filsys fs, blk64_t        *blocknr,
  71                          e2_blkcnt_t blockcnt, blk64_t ref_blk,
  72                          int ref_offset, void *priv_data);
  73 static int process_bad_block(ext2_filsys fs, blk64_t *block_nr,
  74                              e2_blkcnt_t blockcnt, blk64_t ref_blk,
  75                              int ref_offset, void *priv_data);
  76 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
  77                          char *block_buf,
  78                          const struct ea_quota *ea_ibody_quota);
  79 static void mark_table_blocks(e2fsck_t ctx);
  80 static void alloc_bb_map(e2fsck_t ctx);
  81 static void alloc_imagic_map(e2fsck_t ctx);
  82 static void mark_inode_bad(e2fsck_t ctx, ino_t ino);
  83 static void add_casefolded_dir(e2fsck_t ctx, ino_t ino);
  84 static void handle_fs_bad_blocks(e2fsck_t ctx);
  85 static void process_inodes(e2fsck_t ctx, char *block_buf);
  86 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b);
  87 static errcode_t scan_callback(ext2_filsys fs, ext2_inode_scan scan,
  88                                   dgrp_t group, void * priv_data);
  89 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
  90                                     char *block_buf, int adjust_sign);
  91 /* static char *describe_illegal_block(ext2_filsys fs, blk64_t block); */
  92
  93 struct process_block_struct {
  94         ext2_ino_t      ino;
  95         unsigned        is_dir:1, is_reg:1, clear:1, suppress:1,
  96                                 fragmented:1, compressed:1, bbcheck:1,
  97                                 inode_modified:1;
  98         blk64_t         num_blocks;
  99         blk64_t         max_blocks;
 100         blk64_t         last_block;
 101         e2_blkcnt_t     last_init_lblock;
 102         e2_blkcnt_t     last_db_block;
 103         int             num_illegal_blocks;
 104         blk64_t         previous_block;
 105         struct ext2_inode *inode;
 106         struct problem_context *pctx;
 107         ext2fs_block_bitmap fs_meta_blocks;
 108         e2fsck_t        ctx;
 109         blk64_t         next_lblock;
 110         struct extent_tree_info eti;
 111 };
 112
 113 struct process_inode_block {
 114         ext2_ino_t ino;
 115         struct ea_quota ea_ibody_quota;
 116         struct ext2_inode_large inode;
 117 };
 118
 119 struct scan_callback_struct {
 120         e2fsck_t        ctx;
 121         char            *block_buf;
 122 };
 123
 124 /*
 125  * For the inodes to process list.
 126  */
 127 static struct process_inode_block *inodes_to_process;
 128 static int process_inode_count;
 129
 130 static __u64 ext2_max_sizes[EXT2_MAX_BLOCK_LOG_SIZE -
 131                             EXT2_MIN_BLOCK_LOG_SIZE + 1];
 132
 133 /*
 134  * Check to make sure a device inode is real.  Returns 1 if the device
 135  * checks out, 0 if not.
 136  *
 137  * Note: this routine is now also used to check FIFO's and Sockets,
 138  * since they have the same requirement; the i_block fields should be
 139  * zero.
 140  */
 141 int e2fsck_pass1_check_device_inode(ext2_filsys fs EXT2FS_ATTR((unused)),
 142                                     struct ext2_inode *inode)
 143 {
 144         int     i;
 145
 146         /*
 147          * If the index or extents flag is set, then this is a bogus
 148          * device/fifo/socket
 149          */
 150         if (inode->i_flags & (EXT2_INDEX_FL | EXT4_EXTENTS_FL))
 151                 return 0;
 152
 153         /*
 154          * We should be able to do the test below all the time, but
 155          * because the kernel doesn't forcibly clear the device
 156          * inode's additional i_block fields, there are some rare
 157          * occasions when a legitimate device inode will have non-zero
 158          * additional i_block fields.  So for now, we only complain
 159          * when the immutable flag is set, which should never happen
 160          * for devices.  (And that's when the problem is caused, since
 161          * you can't set or clear immutable flags for devices.)  Once
 162          * the kernel has been fixed we can change this...
 163          */
 164         if (inode->i_flags & (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)) {
 165                 for (i=4; i < EXT2_N_BLOCKS; i++)
 166                         if (inode->i_block[i])
 167                                 return 0;
 168         }
 169         return 1;
 170 }
 171
 172 /*
 173  * Check to make sure a symlink inode is real.  Returns 1 if the symlink
 174  * checks out, 0 if not.
 175  */
 176 int e2fsck_pass1_check_symlink(ext2_filsys fs, ext2_ino_t ino,
 177                                struct ext2_inode *inode, char *buf)
 178 {
 179         unsigned int buflen;
 180         unsigned int len;
 181
 182         if ((inode->i_size_high || inode->i_size == 0) ||
 183             (inode->i_flags & EXT2_INDEX_FL))
 184                 return 0;
 185
 186         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
 187                 size_t inline_size;
 188
 189                 if (inode->i_flags & EXT4_EXTENTS_FL)
 190                         return 0;
 191                 if (ext2fs_inline_data_size(fs, ino, &inline_size))
 192                         return 0;
 193                 if (inode->i_size != inline_size)
 194                         return 0;
 195
 196                 return 1;
 197         }
 198
 199         if (ext2fs_is_fast_symlink(inode)) {
 200                 if (inode->i_flags & EXT4_EXTENTS_FL)
 201                         return 0;
 202                 buf = (char *)inode->i_block;
 203                 buflen = sizeof(inode->i_block);
 204         } else {
 205                 ext2_extent_handle_t    handle;
 206                 struct ext2_extent_info info;
 207                 struct ext2fs_extent    extent;
 208                 blk64_t blk;
 209                 int i;
 210
 211                 if (inode->i_flags & EXT4_EXTENTS_FL) {
 212                         if (ext2fs_extent_open2(fs, ino, inode, &handle))
 213                                 return 0;
 214                         if (ext2fs_extent_get_info(handle, &info) ||
 215                             (info.num_entries != 1) ||
 216                             (info.max_depth != 0)) {
 217                                 ext2fs_extent_free(handle);
 218                                 return 0;
 219                         }
 220                         if (ext2fs_extent_get(handle, EXT2_EXTENT_ROOT,
 221                                               &extent) ||
 222                             (extent.e_lblk != 0) ||
 223                             (extent.e_len != 1)) {
 224                                 ext2fs_extent_free(handle);
 225                                 return 0;
 226                         }
 227                         blk = extent.e_pblk;
 228                         ext2fs_extent_free(handle);
 229                 } else {
 230                         blk = inode->i_block[0];
 231
 232                         for (i = 1; i < EXT2_N_BLOCKS; i++)
 233                                 if (inode->i_block[i])
 234                                         return 0;
 235                 }
 236
 237                 if (blk < fs->super->s_first_data_block ||
 238                     blk >= ext2fs_blocks_count(fs->super))
 239                         return 0;
 240
 241                 if (io_channel_read_blk64(fs->io, blk, 1, buf))
 242                         return 0;
 243
 244                 buflen = fs->blocksize;
 245         }
 246
 247         if (inode->i_flags & EXT4_ENCRYPT_FL)
 248                 len = ext2fs_le16_to_cpu(*(__u16 *)buf) + 2;
 249         else
 250                 len = strnlen(buf, buflen);
 251
 252         if (len >= buflen)
 253                 return 0;
 254
 255         if (len != inode->i_size)
 256                 return 0;
 257         return 1;
 258 }
 259
 260 /*
 261  * If the extents or inlinedata flags are set on the inode, offer to clear 'em.
 262  */
 263 #define BAD_SPECIAL_FLAGS (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)
 264 static void check_extents_inlinedata(e2fsck_t ctx,
 265                                      struct problem_context *pctx)
 266 {
 267         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 268                 return;
 269
 270         if (!fix_problem(ctx, PR_1_SPECIAL_EXTENTS_IDATA, pctx))
 271                 return;
 272
 273         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 274         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 275 }
 276 #undef BAD_SPECIAL_FLAGS
 277
 278 /*
 279  * If the immutable (or append-only) flag is set on the inode, offer
 280  * to clear it.
 281  */
 282 #define BAD_SPECIAL_FLAGS (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)
 283 static void check_immutable(e2fsck_t ctx, struct problem_context *pctx)
 284 {
 285         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 286                 return;
 287
 288         if (!fix_problem(ctx, PR_1_SET_IMMUTABLE, pctx))
 289                 return;
 290
 291         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 292         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 293 }
 294
 295 /*
 296  * If device, fifo or socket, check size is zero -- if not offer to
 297  * clear it
 298  */
 299 static void check_size(e2fsck_t ctx, struct problem_context *pctx)
 300 {
 301         struct ext2_inode *inode = pctx->inode;
 302
 303         if (EXT2_I_SIZE(inode) == 0)
 304                 return;
 305
 306         if (!fix_problem(ctx, PR_1_SET_NONZSIZE, pctx))
 307                 return;
 308
 309         ext2fs_inode_size_set(ctx->fs, inode, 0);
 310         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 311 }
 312
 313 /*
 314  * For a given size, calculate how many blocks would be charged towards quota.
 315  */
 316 static blk64_t size_to_quota_blocks(ext2_filsys fs, size_t size)
 317 {
 318         blk64_t clusters;
 319
 320         clusters = DIV_ROUND_UP(size, fs->blocksize << fs->cluster_ratio_bits);
 321         return EXT2FS_C2B(fs, clusters);
 322 }
 323
 324 /*
 325  * Check validity of EA inode. Return 0 if EA inode is valid, otherwise return
 326  * the problem code.
 327  */
 328 static problem_t check_large_ea_inode(e2fsck_t ctx,
 329                                       struct ext2_ext_attr_entry *entry,
 330                                       struct problem_context *pctx,
 331                                       blk64_t *quota_blocks)
 332 {
 333         struct ext2_inode inode;
 334         __u32 hash;
 335         errcode_t retval;
 336
 337         /* Check if inode is within valid range */
 338         if ((entry->e_value_inum < EXT2_FIRST_INODE(ctx->fs->super)) ||
 339             (entry->e_value_inum > ctx->fs->super->s_inodes_count)) {
 340                 pctx->num = entry->e_value_inum;
 341                 return PR_1_ATTR_VALUE_EA_INODE;
 342         }
 343
 344         e2fsck_read_inode(ctx, entry->e_value_inum, &inode, "pass1");
 345
 346         retval = ext2fs_ext_attr_hash_entry2(ctx->fs, entry, NULL, &hash);
 347         if (retval) {
 348                 com_err("check_large_ea_inode", retval,
 349                         _("while hashing entry with e_value_inum = %u"),
 350                         entry->e_value_inum);
 351                 fatal_error(ctx, 0);
 352         }
 353
 354         if (hash == entry->e_hash) {
 355                 *quota_blocks = size_to_quota_blocks(ctx->fs,
 356                                                      entry->e_value_size);
 357         } else {
 358                 /* This might be an old Lustre-style ea_inode reference. */
 359                 if (inode.i_mtime == pctx->ino &&
 360                     inode.i_generation == pctx->inode->i_generation) {
 361                         *quota_blocks = 0;
 362                 } else {
 363                         /* If target inode is also missing EA_INODE flag,
 364                          * this is likely to be a bad reference.
 365                          */
 366                         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 367                                 pctx->num = entry->e_value_inum;
 368                                 return PR_1_ATTR_VALUE_EA_INODE;
 369                         } else {
 370                                 pctx->num = entry->e_hash;
 371                                 return PR_1_ATTR_HASH;
 372                         }
 373                 }
 374         }
 375
 376         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 377                 pctx->num = entry->e_value_inum;
 378                 if (fix_problem(ctx, PR_1_ATTR_SET_EA_INODE_FL, pctx)) {
 379                         inode.i_flags |= EXT4_EA_INODE_FL;
 380                         ext2fs_write_inode(ctx->fs, entry->e_value_inum,
 381                                            &inode);
 382                 } else {
 383                         return PR_1_ATTR_NO_EA_INODE_FL;
 384                 }
 385         }
 386         return 0;
 387 }
 388
 389 static void inc_ea_inode_refs(e2fsck_t ctx, struct problem_context *pctx,
 390                               struct ext2_ext_attr_entry *first, void *end)
 391 {
 392         struct ext2_ext_attr_entry *entry = first;
 393         struct ext2_ext_attr_entry *np = EXT2_EXT_ATTR_NEXT(entry);
 394
 395         while ((void *) entry < end && (void *) np < end &&
 396                !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 397                 if (!entry->e_value_inum)
 398                         goto next;
 399                 if (!ctx->ea_inode_refs) {
 400                         pctx->errcode = ea_refcount_create(0,
 401                                                            &ctx->ea_inode_refs);
 402                         if (pctx->errcode) {
 403                                 pctx->num = 4;
 404                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
 405                                 ctx->flags |= E2F_FLAG_ABORT;
 406                                 return;
 407                         }
 408                 }
 409                 ea_refcount_increment(ctx->ea_inode_refs, entry->e_value_inum,
 410                                       0);
 411         next:
 412                 entry = np;
 413                 np = EXT2_EXT_ATTR_NEXT(entry);
 414         }
 415 }
 416
 417 static void check_ea_in_inode(e2fsck_t ctx, struct problem_context *pctx,
 418                               struct ea_quota *ea_ibody_quota)
 419 {
 420         struct ext2_super_block *sb = ctx->fs->super;
 421         struct ext2_inode_large *inode;
 422         struct ext2_ext_attr_entry *entry;
 423         char *start, *header, *end;
 424         unsigned int storage_size, remain;
 425         problem_t problem = 0;
 426         region_t region = 0;
 427
 428         ea_ibody_quota->blocks = 0;
 429         ea_ibody_quota->inodes = 0;
 430
 431         inode = (struct ext2_inode_large *) pctx->inode;
 432         storage_size = EXT2_INODE_SIZE(ctx->fs->super) - EXT2_GOOD_OLD_INODE_SIZE -
 433                 inode->i_extra_isize;
 434         header = ((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 435                  inode->i_extra_isize;
 436         end = header + storage_size;
 437         start = header + sizeof(__u32);
 438         entry = (struct ext2_ext_attr_entry *) start;
 439
 440         /* scan all entry's headers first */
 441
 442         /* take finish entry 0UL into account */
 443         remain = storage_size - sizeof(__u32);
 444
 445         region = region_create(0, storage_size);
 446         if (!region) {
 447                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
 448                 problem = 0;
 449                 ctx->flags |= E2F_FLAG_ABORT;
 450                 return;
 451         }
 452         if (region_allocate(region, 0, sizeof(__u32))) {
 453                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 454                 goto fix;
 455         }
 456
 457         while (remain >= sizeof(struct ext2_ext_attr_entry) &&
 458                !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 459                 __u32 hash;
 460
 461                 if (region_allocate(region, (char *)entry - (char *)header,
 462                                     EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
 463                         problem = PR_1_INODE_EA_ALLOC_COLLISION;
 464                         goto fix;
 465                 }
 466
 467                 /* header eats this space */
 468                 remain -= sizeof(struct ext2_ext_attr_entry);
 469
 470                 /* is attribute name valid? */
 471                 if (EXT2_EXT_ATTR_SIZE(entry->e_name_len) > remain) {
 472                         pctx->num = entry->e_name_len;
 473                         problem = PR_1_ATTR_NAME_LEN;
 474                         goto fix;
 475                 }
 476
 477                 /* attribute len eats this space */
 478                 remain -= EXT2_EXT_ATTR_SIZE(entry->e_name_len);
 479
 480                 if (entry->e_value_inum == 0) {
 481                         /* check value size */
 482                         if (entry->e_value_size > remain) {
 483                                 pctx->num = entry->e_value_size;
 484                                 problem = PR_1_ATTR_VALUE_SIZE;
 485                                 goto fix;
 486                         }
 487
 488                         if (entry->e_value_size &&
 489                             region_allocate(region,
 490                                             sizeof(__u32) + entry->e_value_offs,
 491                                             EXT2_EXT_ATTR_SIZE(
 492                                                 entry->e_value_size))) {
 493                                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 494                                 goto fix;
 495                         }
 496
 497                         hash = ext2fs_ext_attr_hash_entry(entry,
 498                                                           start + entry->e_value_offs);
 499
 500                         /* e_hash may be 0 in older inode's ea */
 501                         if (entry->e_hash != 0 && entry->e_hash != hash) {
 502                                 pctx->num = entry->e_hash;
 503                                 problem = PR_1_ATTR_HASH;
 504                                 goto fix;
 505                         }
 506                 } else {
 507                         blk64_t quota_blocks;
 508
 509                         problem = check_large_ea_inode(ctx, entry, pctx,
 510                                                        &quota_blocks);
 511                         if (problem != 0)
 512                                 goto fix;
 513
 514                         ea_ibody_quota->blocks += quota_blocks;
 515                         ea_ibody_quota->inodes++;
 516                 }
 517
 518                 /* If EA value is stored in external inode then it does not
 519                  * consume space here */
 520                 if (entry->e_value_inum == 0)
 521                         remain -= entry->e_value_size;
 522
 523                 entry = EXT2_EXT_ATTR_NEXT(entry);
 524         }
 525
 526         if (region_allocate(region, (char *)entry - (char *)header,
 527                             sizeof(__u32))) {
 528                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 529                 goto fix;
 530         }
 531 fix:
 532         if (region)
 533                 region_free(region);
 534         /*
 535          * it seems like a corruption. it's very unlikely we could repair
 536          * EA(s) in automatic fashion -bzzz
 537          */
 538         if (problem == 0 || !fix_problem(ctx, problem, pctx)) {
 539                 inc_ea_inode_refs(ctx, pctx,
 540                                   (struct ext2_ext_attr_entry *)start, end);
 541                 return;
 542         }
 543
 544         /* simply remove all possible EA(s) */
 545         *((__u32 *)header) = 0UL;
 546         e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 547                                 EXT2_INODE_SIZE(sb), "pass1");
 548         ea_ibody_quota->blocks = 0;
 549         ea_ibody_quota->inodes = 0;
 550 }
 551
 552 static int check_inode_extra_negative_epoch(__u32 xtime, __u32 extra) {
 553         return (xtime & (1U << 31)) != 0 &&
 554                 (extra & EXT4_EPOCH_MASK) == EXT4_EPOCH_MASK;
 555 }
 556
 557 #define CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, xtime) \
 558         check_inode_extra_negative_epoch(inode->i_##xtime, \
 559                                          inode->i_##xtime##_extra)
 560
 561 /* When today's date is earlier than 2242, we assume that atimes,
 562  * ctimes, crtimes, and mtimes with years in the range 2310..2378 are
 563  * actually pre-1970 dates mis-encoded.
 564  */
 565 #define EXT4_EXTRA_NEGATIVE_DATE_CUTOFF 2 * (1LL << 32)
 566
 567 static void check_inode_extra_space(e2fsck_t ctx, struct problem_context *pctx,
 568                                     struct ea_quota *ea_ibody_quota)
 569 {
 570         struct ext2_super_block *sb = ctx->fs->super;
 571         struct ext2_inode_large *inode;
 572         __u32 *eamagic;
 573         int min, max;
 574
 575         ea_ibody_quota->blocks = 0;
 576         ea_ibody_quota->inodes = 0;
 577
 578         inode = (struct ext2_inode_large *) pctx->inode;
 579         if (EXT2_INODE_SIZE(sb) == EXT2_GOOD_OLD_INODE_SIZE) {
 580                 /* this isn't large inode. so, nothing to check */
 581                 return;
 582         }
 583
 584 #if 0
 585         printf("inode #%u, i_extra_size %d\n", pctx->ino,
 586                         inode->i_extra_isize);
 587 #endif
 588         /* i_extra_isize must cover i_extra_isize + i_checksum_hi at least */
 589         min = sizeof(inode->i_extra_isize) + sizeof(inode->i_checksum_hi);
 590         max = EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE;
 591         /*
 592          * For now we will allow i_extra_isize to be 0, but really
 593          * implementations should never allow i_extra_isize to be 0
 594          */
 595         if (inode->i_extra_isize &&
 596             (inode->i_extra_isize < min || inode->i_extra_isize > max ||
 597              inode->i_extra_isize & 3)) {
 598                 if (!fix_problem(ctx, PR_1_EXTRA_ISIZE, pctx))
 599                         return;
 600                 if (inode->i_extra_isize < min || inode->i_extra_isize > max)
 601                         inode->i_extra_isize = sb->s_want_extra_isize;
 602                 else
 603                         inode->i_extra_isize = (inode->i_extra_isize + 3) & ~3;
 604                 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 605                                         EXT2_INODE_SIZE(sb), "pass1");
 606         }
 607
 608         /* check if there is no place for an EA header */
 609         if (inode->i_extra_isize >= max - sizeof(__u32))
 610                 return;
 611
 612         eamagic = (__u32 *) (((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 613                         inode->i_extra_isize);
 614         if (*eamagic == EXT2_EXT_ATTR_MAGIC) {
 615                 /* it seems inode has an extended attribute(s) in body */
 616                 check_ea_in_inode(ctx, pctx, ea_ibody_quota);
 617         }
 618
 619         /*
 620          * If the inode's extended atime (ctime, crtime, mtime) is stored in
 621          * the old, invalid format, repair it.
 622          */
 623         if (((sizeof(time_t) <= 4) ||
 624              (((sizeof(time_t) > 4) &&
 625                ctx->now < EXT4_EXTRA_NEGATIVE_DATE_CUTOFF))) &&
 626             (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime) ||
 627              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime) ||
 628              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime) ||
 629              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))) {
 630
 631                 if (!fix_problem(ctx, PR_1_EA_TIME_OUT_OF_RANGE, pctx))
 632                         return;
 633
 634                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime))
 635                         inode->i_atime_extra &= ~EXT4_EPOCH_MASK;
 636                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime))
 637                         inode->i_ctime_extra &= ~EXT4_EPOCH_MASK;
 638                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime))
 639                         inode->i_crtime_extra &= ~EXT4_EPOCH_MASK;
 640                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))
 641                         inode->i_mtime_extra &= ~EXT4_EPOCH_MASK;
 642                 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 643                                         EXT2_INODE_SIZE(sb), "pass1");
 644         }
 645
 646 }
 647
 648 /*
 649  * Check to see if the inode might really be a directory, despite i_mode
 650  *
 651  * This is a lot of complexity for something for which I'm not really
 652  * convinced happens frequently in the wild.  If for any reason this
 653  * causes any problems, take this code out.
 654  * [tytso:20070331.0827EDT]
 655  */
 656 static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx,
 657                                 char *buf)
 658 {
 659         struct ext2_inode *inode = pctx->inode;
 660         struct ext2_dir_entry   *dirent;
 661         errcode_t               retval;
 662         blk64_t                 blk;
 663         unsigned int            i, rec_len, not_device = 0;
 664         int                     extent_fs;
 665         int                     inlinedata_fs;
 666
 667         /*
 668          * If the mode looks OK, we believe it.  If the first block in
 669          * the i_block array is 0, this cannot be a directory. If the
 670          * inode is extent-mapped, it is still the case that the latter
 671          * cannot be 0 - the magic number in the extent header would make
 672          * it nonzero.
 673          */
 674         if (LINUX_S_ISDIR(inode->i_mode) || LINUX_S_ISREG(inode->i_mode) ||
 675             LINUX_S_ISLNK(inode->i_mode) || inode->i_block[0] == 0)
 676                 return;
 677
 678         /*
 679          * Check the block numbers in the i_block array for validity:
 680          * zero blocks are skipped (but the first one cannot be zero -
 681          * see above), other blocks are checked against the first and
 682          * max data blocks (from the the superblock) and against the
 683          * block bitmap. Any invalid block found means this cannot be
 684          * a directory.
 685          *
 686          * If there are non-zero blocks past the fourth entry, then
 687          * this cannot be a device file: we remember that for the next
 688          * check.
 689          *
 690          * For extent mapped files, we don't do any sanity checking:
 691          * just try to get the phys block of logical block 0 and run
 692          * with it.
 693          *
 694          * For inline data files, we just try to get the size of inline
 695          * data.  If it's true, we will treat it as a directory.
 696          */
 697
 698         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
 699         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
 700         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL)) {
 701                 size_t size;
 702                 __u32 dotdot;
 703                 unsigned int rec_len2;
 704                 struct ext2_dir_entry de;
 705
 706                 if (ext2fs_inline_data_size(ctx->fs, pctx->ino, &size))
 707                         return;
 708                 /*
 709                  * If the size isn't a multiple of 4, it's probably not a
 710                  * directory??
 711                  */
 712                 if (size & 3)
 713                         return;
 714                 /*
 715                  * If the first 10 bytes don't look like a directory entry,
 716                  * it's probably not a directory.
 717                  */
 718                 memcpy(&dotdot, inode->i_block, sizeof(dotdot));
 719                 memcpy(&de, ((char *)inode->i_block) + EXT4_INLINE_DATA_DOTDOT_SIZE,
 720                        EXT2_DIR_REC_LEN(0));
 721                 dotdot = ext2fs_le32_to_cpu(dotdot);
 722                 de.inode = ext2fs_le32_to_cpu(de.inode);
 723                 de.rec_len = ext2fs_le16_to_cpu(de.rec_len);
 724                 ext2fs_get_rec_len(ctx->fs, &de, &rec_len2);
 725                 if (dotdot >= ctx->fs->super->s_inodes_count ||
 726                     (dotdot < EXT2_FIRST_INO(ctx->fs->super) &&
 727                      dotdot != EXT2_ROOT_INO) ||
 728                     de.inode >= ctx->fs->super->s_inodes_count ||
 729                     (de.inode < EXT2_FIRST_INO(ctx->fs->super) &&
 730                      de.inode != 0) ||
 731                     rec_len2 > EXT4_MIN_INLINE_DATA_SIZE -
 732                               EXT4_INLINE_DATA_DOTDOT_SIZE)
 733                         return;
 734                 /* device files never have a "system.data" entry */
 735                 goto isdir;
 736         } else if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) {
 737                 /* extent mapped */
 738                 if  (ext2fs_bmap2(ctx->fs, pctx->ino, inode, 0, 0, 0, 0,
 739                                  &blk))
 740                         return;
 741                 /* device files are never extent mapped */
 742                 not_device++;
 743         } else {
 744                 for (i=0; i < EXT2_N_BLOCKS; i++) {
 745                         blk = inode->i_block[i];
 746                         if (!blk)
 747                                 continue;
 748                         if (i >= 4)
 749                                 not_device++;
 750
 751                         if (blk < ctx->fs->super->s_first_data_block ||
 752                             blk >= ext2fs_blocks_count(ctx->fs->super) ||
 753                             ext2fs_fast_test_block_bitmap2(ctx->block_found_map,
 754                                                            blk))
 755                                 return; /* Invalid block, can't be dir */
 756                 }
 757                 blk = inode->i_block[0];
 758         }
 759
 760         /*
 761          * If the mode says this is a device file and the i_links_count field
 762          * is sane and we have not ruled it out as a device file previously,
 763          * we declare it a device file, not a directory.
 764          */
 765         if ((LINUX_S_ISCHR(inode->i_mode) || LINUX_S_ISBLK(inode->i_mode)) &&
 766             (inode->i_links_count == 1) && !not_device)
 767                 return;
 768
 769         /* read the first block */
 770         ehandler_operation(_("reading directory block"));
 771         retval = ext2fs_read_dir_block4(ctx->fs, blk, buf, 0, pctx->ino);
 772         ehandler_operation(0);
 773         if (retval)
 774                 return;
 775
 776         dirent = (struct ext2_dir_entry *) buf;
 777         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 778         if (retval)
 779                 return;
 780         if ((ext2fs_dirent_name_len(dirent) != 1) ||
 781             (dirent->name[0] != '.') ||
 782             (dirent->inode != pctx->ino) ||
 783             (rec_len < 12) ||
 784             (rec_len % 4) ||
 785             (rec_len >= ctx->fs->blocksize - 12))
 786                 return;
 787
 788         dirent = (struct ext2_dir_entry *) (buf + rec_len);
 789         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 790         if (retval)
 791                 return;
 792         if ((ext2fs_dirent_name_len(dirent) != 2) ||
 793             (dirent->name[0] != '.') ||
 794             (dirent->name[1] != '.') ||
 795             (rec_len < 12) ||
 796             (rec_len % 4))
 797                 return;
 798
 799 isdir:
 800         if (fix_problem(ctx, PR_1_TREAT_AS_DIRECTORY, pctx)) {
 801                 inode->i_mode = (inode->i_mode & 07777) | LINUX_S_IFDIR;
 802                 e2fsck_write_inode_full(ctx, pctx->ino, inode,
 803                                         EXT2_INODE_SIZE(ctx->fs->super),
 804                                         "check_is_really_dir");
 805         }
 806 }
 807
 808 extern errcode_t e2fsck_setup_icount(e2fsck_t ctx, const char *icount_name,
 809                                      int flags, ext2_icount_t hint,
 810                                      ext2_icount_t *ret)
 811 {
 812         unsigned int            threshold;
 813         unsigned int            save_type;
 814         ext2_ino_t              num_dirs;
 815         errcode_t               retval;
 816         char                    *tdb_dir;
 817         int                     enable;
 818
 819         *ret = 0;
 820
 821         profile_get_string(ctx->profile, "scratch_files", "directory", 0, 0,
 822                            &tdb_dir);
 823         profile_get_uint(ctx->profile, "scratch_files",
 824                          "numdirs_threshold", 0, 0, &threshold);
 825         profile_get_boolean(ctx->profile, "scratch_files",
 826                             "icount", 0, 1, &enable);
 827
 828         retval = ext2fs_get_num_dirs(ctx->fs, &num_dirs);
 829         if (retval)
 830                 num_dirs = 1024;        /* Guess */
 831
 832         if (enable && tdb_dir && !access(tdb_dir, W_OK) &&
 833             (!threshold || num_dirs > threshold)) {
 834                 retval = ext2fs_create_icount_tdb(ctx->fs, tdb_dir,
 835                                                   flags, ret);
 836                 if (retval == 0)
 837                         return 0;
 838         }
 839         e2fsck_set_bitmap_type(ctx->fs, EXT2FS_BMAP64_RBTREE, icount_name,
 840                                &save_type);
 841         if (ctx->options & E2F_OPT_ICOUNT_FULLMAP)
 842                 flags |= EXT2_ICOUNT_OPT_FULLMAP;
 843         retval = ext2fs_create_icount2(ctx->fs, flags, 0, hint, ret);
 844         ctx->fs->default_bitmap_type = save_type;
 845         return retval;
 846 }
 847
 848 static errcode_t recheck_bad_inode_checksum(ext2_filsys fs, ext2_ino_t ino,
 849                                             e2fsck_t ctx,
 850                                             struct problem_context *pctx)
 851 {
 852         errcode_t retval;
 853         struct ext2_inode_large inode;
 854
 855         /*
 856          * Reread inode.  If we don't see checksum error, then this inode
 857          * has been fixed elsewhere.
 858          */
 859         ctx->stashed_ino = 0;
 860         retval = ext2fs_read_inode_full(fs, ino, (struct ext2_inode *)&inode,
 861                                         sizeof(inode));
 862         if (retval && retval != EXT2_ET_INODE_CSUM_INVALID)
 863                 return retval;
 864         if (!retval)
 865                 return 0;
 866
 867         /*
 868          * Checksum still doesn't match.  That implies that the inode passes
 869          * all the sanity checks, so maybe the checksum is simply corrupt.
 870          * See if the user will go for fixing that.
 871          */
 872         if (!fix_problem(ctx, PR_1_INODE_ONLY_CSUM_INVALID, pctx))
 873                 return 0;
 874
 875         retval = ext2fs_write_inode_full(fs, ino, (struct ext2_inode *)&inode,
 876                                          sizeof(inode));
 877         return retval;
 878 }
 879
 880 static void reserve_block_for_root_repair(e2fsck_t ctx)
 881 {
 882         blk64_t         blk = 0;
 883         errcode_t       err;
 884         ext2_filsys     fs = ctx->fs;
 885
 886         ctx->root_repair_block = 0;
 887         if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO))
 888                 return;
 889
 890         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 891         if (err)
 892                 return;
 893         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 894         ctx->root_repair_block = blk;
 895 }
 896
 897 static void reserve_block_for_lnf_repair(e2fsck_t ctx)
 898 {
 899         blk64_t         blk = 0;
 900         errcode_t       err;
 901         ext2_filsys     fs = ctx->fs;
 902         static const char name[] = "lost+found";
 903         ext2_ino_t      ino;
 904
 905         ctx->lnf_repair_block = 0;
 906         if (!ext2fs_lookup(fs, EXT2_ROOT_INO, name, sizeof(name)-1, 0, &ino))
 907                 return;
 908
 909         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 910         if (err)
 911                 return;
 912         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 913         ctx->lnf_repair_block = blk;
 914 }
 915
 916 static errcode_t get_inline_data_ea_size(ext2_filsys fs, ext2_ino_t ino,
 917                                          struct ext2_inode *inode,
 918                                          size_t *sz)
 919 {
 920         void *p;
 921         struct ext2_xattr_handle *handle;
 922         errcode_t retval;
 923
 924         retval = ext2fs_xattrs_open(fs, ino, &handle);
 925         if (retval)
 926                 return retval;
 927
 928         retval = ext2fs_xattrs_read_inode(handle,
 929                                           (struct ext2_inode_large *)inode);
 930         if (retval)
 931                 goto err;
 932
 933         retval = ext2fs_xattr_get(handle, "system.data", &p, sz);
 934         if (retval)
 935                 goto err;
 936         ext2fs_free_mem(&p);
 937 err:
 938         (void) ext2fs_xattrs_close(&handle);
 939         return retval;
 940 }
 941
 942 static void finish_processing_inode(e2fsck_t ctx, ext2_ino_t ino,
 943                                     struct problem_context *pctx,
 944                                     int failed_csum)
 945 {
 946         if (!failed_csum)
 947                 return;
 948
 949         /*
 950          * If the inode failed the checksum and the user didn't
 951          * clear the inode, test the checksum again -- if it still
 952          * fails, ask the user if the checksum should be corrected.
 953          */
 954         pctx->errcode = recheck_bad_inode_checksum(ctx->fs, ino, ctx, pctx);
 955         if (pctx->errcode)
 956                 ctx->flags |= E2F_FLAG_ABORT;
 957 }
 958 #define FINISH_INODE_LOOP(ctx, ino, pctx, failed_csum) \
 959         do { \
 960                 finish_processing_inode((ctx), (ino), (pctx), (failed_csum)); \
 961                 if ((ctx)->flags & E2F_FLAG_ABORT) \
 962                         return; \
 963         } while (0)
 964
 965 static int could_be_block_map(ext2_filsys fs, struct ext2_inode *inode)
 966 {
 967         __u32 x;
 968         int i;
 969
 970         for (i = 0; i < EXT2_N_BLOCKS; i++) {
 971                 x = inode->i_block[i];
 972 #ifdef WORDS_BIGENDIAN
 973                 x = ext2fs_swab32(x);
 974 #endif
 975                 if (x >= ext2fs_blocks_count(fs->super))
 976                         return 0;
 977         }
 978
 979         return 1;
 980 }
 981
 982 /*
 983  * Figure out what to do with an inode that has both extents and inline data
 984  * inode flags set.  Returns -1 if we decide to erase the inode, 0 otherwise.
 985  */
 986 static int fix_inline_data_extents_file(e2fsck_t ctx,
 987                                         ext2_ino_t ino,
 988                                         struct ext2_inode *inode,
 989                                         int inode_size,
 990                                         struct problem_context *pctx)
 991 {
 992         size_t max_inline_ea_size;
 993         ext2_filsys fs = ctx->fs;
 994         int dirty = 0;
 995
 996         /* Both feature flags not set?  Just run the regular checks */
 997         if (!ext2fs_has_feature_extents(fs->super) &&
 998             !ext2fs_has_feature_inline_data(fs->super))
 999                 return 0;
1000
1001         /* Clear both flags if it's a special file */
1002         if (LINUX_S_ISCHR(inode->i_mode) ||
1003             LINUX_S_ISBLK(inode->i_mode) ||
1004             LINUX_S_ISFIFO(inode->i_mode) ||
1005             LINUX_S_ISSOCK(inode->i_mode)) {
1006                 check_extents_inlinedata(ctx, pctx);
1007                 return 0;
1008         }
1009
1010         /* If it looks like an extent tree, try to clear inlinedata */
1011         if (ext2fs_extent_header_verify(inode->i_block,
1012                                  sizeof(inode->i_block)) == 0 &&
1013             fix_problem(ctx, PR_1_CLEAR_INLINE_DATA_FOR_EXTENT, pctx)) {
1014                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1015                 dirty = 1;
1016                 goto out;
1017         }
1018
1019         /* If it looks short enough to be inline data, try to clear extents */
1020         if (inode_size > EXT2_GOOD_OLD_INODE_SIZE)
1021                 max_inline_ea_size = inode_size -
1022                                      (EXT2_GOOD_OLD_INODE_SIZE +
1023                                       ((struct ext2_inode_large *)inode)->i_extra_isize);
1024         else
1025                 max_inline_ea_size = 0;
1026         if (EXT2_I_SIZE(inode) <
1027             EXT4_MIN_INLINE_DATA_SIZE + max_inline_ea_size &&
1028             fix_problem(ctx, PR_1_CLEAR_EXTENT_FOR_INLINE_DATA, pctx)) {
1029                 inode->i_flags &= ~EXT4_EXTENTS_FL;
1030                 dirty = 1;
1031                 goto out;
1032         }
1033
1034         /*
1035          * Too big for inline data, but no evidence of extent tree -
1036          * maybe it's a block map file?  If the mappings all look valid?
1037          */
1038         if (could_be_block_map(fs, inode) &&
1039             fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_FLAGS, pctx)) {
1040 #ifdef WORDS_BIGENDIAN
1041                 int i;
1042
1043                 for (i = 0; i < EXT2_N_BLOCKS; i++)
1044                         inode->i_block[i] = ext2fs_swab32(inode->i_block[i]);
1045 #endif
1046
1047                 inode->i_flags &= ~(EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL);
1048                 dirty = 1;
1049                 goto out;
1050         }
1051
1052         /* Oh well, just clear the busted inode. */
1053         if (fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_INODE, pctx)) {
1054                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1055                 return -1;
1056         }
1057
1058 out:
1059         if (dirty)
1060                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1061
1062         return 0;
1063 }
1064
1065 static void pass1_readahead(e2fsck_t ctx, dgrp_t *group, ext2_ino_t *next_ino)
1066 {
1067         ext2_ino_t inodes_in_group = 0, inodes_per_block, inodes_per_buffer;
1068         dgrp_t start = *group, grp;
1069         blk64_t blocks_to_read = 0;
1070         errcode_t err = EXT2_ET_INVALID_ARGUMENT;
1071
1072         if (ctx->readahead_kb == 0)
1073                 goto out;
1074
1075         /* Keep iterating groups until we have enough to readahead */
1076         inodes_per_block = EXT2_INODES_PER_BLOCK(ctx->fs->super);
1077         for (grp = start; grp < ctx->fs->group_desc_count; grp++) {
1078                 if (ext2fs_bg_flags_test(ctx->fs, grp, EXT2_BG_INODE_UNINIT))
1079                         continue;
1080                 inodes_in_group = ctx->fs->super->s_inodes_per_group -
1081                                         ext2fs_bg_itable_unused(ctx->fs, grp);
1082                 blocks_to_read += (inodes_in_group + inodes_per_block - 1) /
1083                                         inodes_per_block;
1084                 if (blocks_to_read * ctx->fs->blocksize >
1085                     ctx->readahead_kb * 1024)
1086                         break;
1087         }
1088
1089         err = e2fsck_readahead(ctx->fs, E2FSCK_READA_ITABLE, start,
1090                                grp - start + 1);
1091         if (err == EAGAIN) {
1092                 ctx->readahead_kb /= 2;
1093                 err = 0;
1094         }
1095
1096 out:
1097         if (err) {
1098                 /* Error; disable itable readahead */
1099                 *group = ctx->fs->group_desc_count;
1100                 *next_ino = ctx->fs->super->s_inodes_count;
1101         } else {
1102                 /*
1103                  * Don't do more readahead until we've reached the first inode
1104                  * of the last inode scan buffer block for the last group.
1105                  */
1106                 *group = grp + 1;
1107                 inodes_per_buffer = (ctx->inode_buffer_blocks ?
1108                                      ctx->inode_buffer_blocks :
1109                                      EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS) *
1110                                     ctx->fs->blocksize /
1111                                     EXT2_INODE_SIZE(ctx->fs->super);
1112                 inodes_in_group--;
1113                 *next_ino = inodes_in_group -
1114                             (inodes_in_group % inodes_per_buffer) + 1 +
1115                             (grp * ctx->fs->super->s_inodes_per_group);
1116         }
1117 }
1118
1119 /*
1120  * Check if the passed ino is one of the used superblock quota inodes.
1121  *
1122  * Before the quota inodes were journaled, older superblock quota inodes
1123  * were just regular files in the filesystem and not reserved inodes.  This
1124  * checks if the passed ino is one of the s_*_quota_inum superblock fields,
1125  * which may not always be the same as the EXT4_*_QUOTA_INO fields.
1126  */
1127 static int quota_inum_is_super(struct ext2_super_block *sb, ext2_ino_t ino)
1128 {
1129         enum quota_type qtype;
1130
1131         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1132                 if (*quota_sb_inump(sb, qtype) == ino)
1133                         return 1;
1134
1135         return 0;
1136 }
1137
1138 /*
1139  * Check if the passed ino is one of the reserved quota inodes.
1140  * This checks if the inode number is one of the reserved EXT4_*_QUOTA_INO
1141  * inodes.  These inodes may or may not be in use by the quota feature.
1142  */
1143 static int quota_inum_is_reserved(ext2_filsys fs, ext2_ino_t ino)
1144 {
1145         enum quota_type qtype;
1146
1147         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1148                 if (quota_type2inum(qtype, fs->super) == ino)
1149                         return 1;
1150
1151         return 0;
1152 }
1153
1154 void e2fsck_pass1(e2fsck_t ctx)
1155 {
1156         int     i;
1157         __u64   max_sizes;
1158         ext2_filsys fs = ctx->fs;
1159         ext2_ino_t      ino = 0;
1160         struct ext2_inode *inode = NULL;
1161         ext2_inode_scan scan = NULL;
1162         char            *block_buf = NULL;
1163 #ifdef RESOURCE_TRACK
1164         struct resource_track   rtrack;
1165 #endif
1166         unsigned char   frag, fsize;
1167         struct          problem_context pctx;
1168         struct          scan_callback_struct scan_struct;
1169         struct ext2_super_block *sb = ctx->fs->super;
1170         const char      *old_op;
1171         const char      *eop_next_inode = _("getting next inode from scan");
1172         int             imagic_fs, extent_fs, inlinedata_fs, casefold_fs;
1173         int             low_dtime_check = 1;
1174         unsigned int    inode_size = EXT2_INODE_SIZE(fs->super);
1175         unsigned int    bufsize;
1176         int             failed_csum = 0;
1177         ext2_ino_t      ino_threshold = 0;
1178         dgrp_t          ra_group = 0;
1179         struct ea_quota ea_ibody_quota;
1180
1181         init_resource_track(&rtrack, ctx->fs->io);
1182         clear_problem_context(&pctx);
1183
1184         /* If we can do readahead, figure out how many groups to pull in. */
1185         if (!e2fsck_can_readahead(ctx->fs))
1186                 ctx->readahead_kb = 0;
1187         else if (ctx->readahead_kb == ~0ULL)
1188                 ctx->readahead_kb = e2fsck_guess_readahead(ctx->fs);
1189         pass1_readahead(ctx, &ra_group, &ino_threshold);
1190
1191         if (!(ctx->options & E2F_OPT_PREEN))
1192                 fix_problem(ctx, PR_1_PASS_HEADER, &pctx);
1193
1194         if (ext2fs_has_feature_dir_index(fs->super) &&
1195             !(ctx->options & E2F_OPT_NO)) {
1196                 if (ext2fs_u32_list_create(&ctx->dirs_to_hash, 50))
1197                         ctx->dirs_to_hash = 0;
1198         }
1199
1200 #ifdef MTRACE
1201         mtrace_print("Pass 1");
1202 #endif
1203
1204 #define EXT2_BPP(bits) (1ULL << ((bits) - 2))
1205
1206         for (i = EXT2_MIN_BLOCK_LOG_SIZE; i <= EXT2_MAX_BLOCK_LOG_SIZE; i++) {
1207                 max_sizes = EXT2_NDIR_BLOCKS + EXT2_BPP(i);
1208                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i);
1209                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i) * EXT2_BPP(i);
1210                 max_sizes = (max_sizes * (1UL << i));
1211                 ext2_max_sizes[i - EXT2_MIN_BLOCK_LOG_SIZE] = max_sizes;
1212         }
1213 #undef EXT2_BPP
1214
1215         imagic_fs = ext2fs_has_feature_imagic_inodes(sb);
1216         extent_fs = ext2fs_has_feature_extents(sb);
1217         inlinedata_fs = ext2fs_has_feature_inline_data(sb);
1218         casefold_fs = ext2fs_has_feature_casefold(sb);
1219
1220         /*
1221          * Allocate bitmaps structures
1222          */
1223         pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("in-use inode map"),
1224                                                     EXT2FS_BMAP64_RBTREE,
1225                                                     "inode_used_map",
1226                                                     &ctx->inode_used_map);
1227         if (pctx.errcode) {
1228                 pctx.num = 1;
1229                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1230                 ctx->flags |= E2F_FLAG_ABORT;
1231                 return;
1232         }
1233         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1234                         _("directory inode map"),
1235                         EXT2FS_BMAP64_AUTODIR,
1236                         "inode_dir_map", &ctx->inode_dir_map);
1237         if (pctx.errcode) {
1238                 pctx.num = 2;
1239                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1240                 ctx->flags |= E2F_FLAG_ABORT;
1241                 return;
1242         }
1243         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1244                         _("regular file inode map"), EXT2FS_BMAP64_RBTREE,
1245                         "inode_reg_map", &ctx->inode_reg_map);
1246         if (pctx.errcode) {
1247                 pctx.num = 6;
1248                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1249                 ctx->flags |= E2F_FLAG_ABORT;
1250                 return;
1251         }
1252         pctx.errcode = e2fsck_allocate_subcluster_bitmap(fs,
1253                         _("in-use block map"), EXT2FS_BMAP64_RBTREE,
1254                         "block_found_map", &ctx->block_found_map);
1255         if (pctx.errcode) {
1256                 pctx.num = 1;
1257                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1258                 ctx->flags |= E2F_FLAG_ABORT;
1259                 return;
1260         }
1261         pctx.errcode = e2fsck_allocate_block_bitmap(fs,
1262                         _("metadata block map"), EXT2FS_BMAP64_RBTREE,
1263                         "block_metadata_map", &ctx->block_metadata_map);
1264         if (pctx.errcode) {
1265                 pctx.num = 1;
1266                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1267                 ctx->flags |= E2F_FLAG_ABORT;
1268                 return;
1269         }
1270         if (casefold_fs) {
1271                 pctx.errcode =
1272                         e2fsck_allocate_inode_bitmap(fs,
1273                                                      _("inode casefold map"),
1274                                                      EXT2FS_BMAP64_RBTREE,
1275                                                      "inode_casefold_map",
1276                                                      &ctx->inode_casefold_map);
1277                 if (pctx.errcode) {
1278                         pctx.num = 1;
1279                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1280                         ctx->flags |= E2F_FLAG_ABORT;
1281                         return;
1282                 }
1283         }
1284         pctx.errcode = e2fsck_setup_icount(ctx, "inode_link_info", 0, NULL,
1285                                            &ctx->inode_link_info);
1286         if (pctx.errcode) {
1287                 fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
1288                 ctx->flags |= E2F_FLAG_ABORT;
1289                 return;
1290         }
1291         bufsize = inode_size;
1292         if (bufsize < sizeof(struct ext2_inode_large))
1293                 bufsize = sizeof(struct ext2_inode_large);
1294         inode = (struct ext2_inode *)
1295                 e2fsck_allocate_memory(ctx, bufsize, "scratch inode");
1296
1297         inodes_to_process = (struct process_inode_block *)
1298                 e2fsck_allocate_memory(ctx,
1299                                        (ctx->process_inode_size *
1300                                         sizeof(struct process_inode_block)),
1301                                        "array of inodes to process");
1302         process_inode_count = 0;
1303
1304         pctx.errcode = ext2fs_init_dblist(fs, 0);
1305         if (pctx.errcode) {
1306                 fix_problem(ctx, PR_1_ALLOCATE_DBCOUNT, &pctx);
1307                 ctx->flags |= E2F_FLAG_ABORT;
1308                 goto endit;
1309         }
1310
1311         /*
1312          * If the last orphan field is set, clear it, since the pass1
1313          * processing will automatically find and clear the orphans.
1314          * In the future, we may want to try using the last_orphan
1315          * linked list ourselves, but for now, we clear it so that the
1316          * ext3 mount code won't get confused.
1317          */
1318         if (!(ctx->options & E2F_OPT_READONLY)) {
1319                 if (fs->super->s_last_orphan) {
1320                         fs->super->s_last_orphan = 0;
1321                         ext2fs_mark_super_dirty(fs);
1322                 }
1323         }
1324
1325         mark_table_blocks(ctx);
1326         pctx.errcode = ext2fs_convert_subcluster_bitmap(fs,
1327                                                 &ctx->block_found_map);
1328         if (pctx.errcode) {
1329                 fix_problem(ctx, PR_1_CONVERT_SUBCLUSTER, &pctx);
1330                 ctx->flags |= E2F_FLAG_ABORT;
1331                 goto endit;
1332         }
1333         block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3,
1334                                                     "block interate buffer");
1335         if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
1336                 e2fsck_use_inode_shortcuts(ctx, 1);
1337         e2fsck_intercept_block_allocations(ctx);
1338         old_op = ehandler_operation(_("opening inode scan"));
1339         pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks,
1340                                               &scan);
1341         ehandler_operation(old_op);
1342         if (pctx.errcode) {
1343                 fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1344                 ctx->flags |= E2F_FLAG_ABORT;
1345                 goto endit;
1346         }
1347         ext2fs_inode_scan_flags(scan, EXT2_SF_SKIP_MISSING_ITABLE |
1348                                       EXT2_SF_WARN_GARBAGE_INODES, 0);
1349         ctx->stashed_inode = inode;
1350         scan_struct.ctx = ctx;
1351         scan_struct.block_buf = block_buf;
1352         ext2fs_set_inode_callback(scan, scan_callback, &scan_struct);
1353         if (ctx->progress && ((ctx->progress)(ctx, 1, 0,
1354                                               ctx->fs->group_desc_count)))
1355                 goto endit;
1356         if ((fs->super->s_wtime &&
1357              fs->super->s_wtime < fs->super->s_inodes_count) ||
1358             (fs->super->s_mtime &&
1359              fs->super->s_mtime < fs->super->s_inodes_count) ||
1360             (fs->super->s_mkfs_time &&
1361              fs->super->s_mkfs_time < fs->super->s_inodes_count))
1362                 low_dtime_check = 0;
1363
1364         if (ext2fs_has_feature_mmp(fs->super) &&
1365             fs->super->s_mmp_block > fs->super->s_first_data_block &&
1366             fs->super->s_mmp_block < ext2fs_blocks_count(fs->super))
1367                 ext2fs_mark_block_bitmap2(ctx->block_found_map,
1368                                           fs->super->s_mmp_block);
1369
1370         /* Set up ctx->lost_and_found if possible */
1371         (void) e2fsck_get_lost_and_found(ctx, 0);
1372
1373         while (1) {
1374                 if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
1375                         if (e2fsck_mmp_update(fs))
1376                                 fatal_error(ctx, 0);
1377                 }
1378                 old_op = ehandler_operation(eop_next_inode);
1379                 pctx.errcode = ext2fs_get_next_inode_full(scan, &ino,
1380                                                           inode, inode_size);
1381                 if (ino > ino_threshold)
1382                         pass1_readahead(ctx, &ra_group, &ino_threshold);
1383                 ehandler_operation(old_op);
1384                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1385                         goto endit;
1386                 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) {
1387                         /*
1388                          * If badblocks says badblocks is bad, offer to clear
1389                          * the list, update the in-core bb list, and restart
1390                          * the inode scan.
1391                          */
1392                         if (ino == EXT2_BAD_INO &&
1393                             fix_problem(ctx, PR_1_BADBLOCKS_IN_BADBLOCKS,
1394                                         &pctx)) {
1395                                 errcode_t err;
1396
1397                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1398                                 ext2fs_badblocks_list_free(ctx->fs->badblocks);
1399                                 ctx->fs->badblocks = NULL;
1400                                 err = ext2fs_read_bb_inode(ctx->fs,
1401                                                         &ctx->fs->badblocks);
1402                                 if (err) {
1403                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1404                                                     &pctx);
1405                                         ctx->flags |= E2F_FLAG_ABORT;
1406                                 } else
1407                                         ctx->flags |= E2F_FLAG_RESTART;
1408                                 goto endit;
1409                         }
1410                         if (!ctx->inode_bb_map)
1411                                 alloc_bb_map(ctx);
1412                         ext2fs_mark_inode_bitmap2(ctx->inode_bb_map, ino);
1413                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1414                         continue;
1415                 }
1416                 if (pctx.errcode &&
1417                     pctx.errcode != EXT2_ET_INODE_CSUM_INVALID &&
1418                     pctx.errcode != EXT2_ET_INODE_IS_GARBAGE) {
1419                         fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1420                         ctx->flags |= E2F_FLAG_ABORT;
1421                         goto endit;
1422                 }
1423                 if (!ino)
1424                         break;
1425                 pctx.ino = ino;
1426                 pctx.inode = inode;
1427                 ctx->stashed_ino = ino;
1428
1429                 /* Clear trashed inode? */
1430                 if (pctx.errcode == EXT2_ET_INODE_IS_GARBAGE &&
1431                     inode->i_links_count > 0 &&
1432                     fix_problem(ctx, PR_1_INODE_IS_GARBAGE, &pctx)) {
1433                         pctx.errcode = 0;
1434                         e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1435                 }
1436                 failed_csum = pctx.errcode != 0;
1437
1438                 /*
1439                  * Check for inodes who might have been part of the
1440                  * orphaned list linked list.  They should have gotten
1441                  * dealt with by now, unless the list had somehow been
1442                  * corrupted.
1443                  *
1444                  * FIXME: In the future, inodes which are still in use
1445                  * (and which are therefore) pending truncation should
1446                  * be handled specially.  Right now we just clear the
1447                  * dtime field, and the normal e2fsck handling of
1448                  * inodes where i_size and the inode blocks are
1449                  * inconsistent is to fix i_size, instead of releasing
1450                  * the extra blocks.  This won't catch the inodes that
1451                  * was at the end of the orphan list, but it's better
1452                  * than nothing.  The right answer is that there
1453                  * shouldn't be any bugs in the orphan list handling.  :-)
1454                  */
1455                 if (inode->i_dtime && low_dtime_check &&
1456                     inode->i_dtime < ctx->fs->super->s_inodes_count) {
1457                         if (fix_problem(ctx, PR_1_LOW_DTIME, &pctx)) {
1458                                 inode->i_dtime = inode->i_links_count ?
1459                                         0 : ctx->now;
1460                                 e2fsck_write_inode(ctx, ino, inode,
1461                                                    "pass1");
1462                                 failed_csum = 0;
1463                         }
1464                 }
1465
1466                 if (inode->i_links_count) {
1467                         pctx.errcode = ext2fs_icount_store(ctx->inode_link_info,
1468                                            ino, inode->i_links_count);
1469                         if (pctx.errcode) {
1470                                 pctx.num = inode->i_links_count;
1471                                 fix_problem(ctx, PR_1_ICOUNT_STORE, &pctx);
1472                                 ctx->flags |= E2F_FLAG_ABORT;
1473                                 goto endit;
1474                         }
1475                 } else if ((ino >= EXT2_FIRST_INODE(fs->super)) &&
1476                            !quota_inum_is_reserved(fs, ino)) {
1477                         if (!inode->i_dtime && inode->i_mode) {
1478                                 if (fix_problem(ctx,
1479                                             PR_1_ZERO_DTIME, &pctx)) {
1480                                         inode->i_dtime = ctx->now;
1481                                         e2fsck_write_inode(ctx, ino, inode,
1482                                                            "pass1");
1483                                         failed_csum = 0;
1484                                 }
1485                         }
1486                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1487                         continue;
1488                 }
1489
1490                 if ((inode->i_flags & EXT4_CASEFOLD_FL) &&
1491                     ((!LINUX_S_ISDIR(inode->i_mode) &&
1492                       fix_problem(ctx, PR_1_CASEFOLD_NONDIR, &pctx)) ||
1493                      (!casefold_fs &&
1494                       fix_problem(ctx, PR_1_CASEFOLD_FEATURE, &pctx)))) {
1495                         inode->i_flags &= ~EXT4_CASEFOLD_FL;
1496                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1497                 }
1498
1499                 /* Conflicting inlinedata/extents inode flags? */
1500                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
1501                     (inode->i_flags & EXT4_EXTENTS_FL)) {
1502                         int res = fix_inline_data_extents_file(ctx, ino, inode,
1503                                                                inode_size,
1504                                                                &pctx);
1505                         if (res < 0) {
1506                                 /* skip FINISH_INODE_LOOP */
1507                                 continue;
1508                         }
1509                 }
1510
1511                 /* Test for incorrect inline_data flags settings. */
1512                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && !inlinedata_fs &&
1513                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1514                         size_t size = 0;
1515
1516                         pctx.errcode = get_inline_data_ea_size(fs, ino, inode,
1517                                                                &size);
1518                         if (!pctx.errcode &&
1519                             fix_problem(ctx, PR_1_INLINE_DATA_FEATURE, &pctx)) {
1520                                 ext2fs_set_feature_inline_data(sb);
1521                                 ext2fs_mark_super_dirty(fs);
1522                                 inlinedata_fs = 1;
1523                         } else if (fix_problem(ctx, PR_1_INLINE_DATA_SET, &pctx)) {
1524                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1525                                 /* skip FINISH_INODE_LOOP */
1526                                 continue;
1527                         }
1528                 }
1529
1530                 /* Test for inline data flag but no attr */
1531                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && inlinedata_fs &&
1532                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1533                         size_t size = 0;
1534                         errcode_t err;
1535                         int flags;
1536
1537                         flags = fs->flags;
1538                         if (failed_csum)
1539                                 fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1540                         err = get_inline_data_ea_size(fs, ino, inode, &size);
1541                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1542                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1543
1544                         switch (err) {
1545                         case 0:
1546                                 /* Everything is awesome... */
1547                                 break;
1548                         case EXT2_ET_BAD_EA_BLOCK_NUM:
1549                         case EXT2_ET_BAD_EA_HASH:
1550                         case EXT2_ET_BAD_EA_HEADER:
1551                         case EXT2_ET_EA_BAD_NAME_LEN:
1552                         case EXT2_ET_EA_BAD_VALUE_SIZE:
1553                         case EXT2_ET_EA_KEY_NOT_FOUND:
1554                         case EXT2_ET_EA_NO_SPACE:
1555                         case EXT2_ET_MISSING_EA_FEATURE:
1556                         case EXT2_ET_INLINE_DATA_CANT_ITERATE:
1557                         case EXT2_ET_INLINE_DATA_NO_BLOCK:
1558                         case EXT2_ET_INLINE_DATA_NO_SPACE:
1559                         case EXT2_ET_NO_INLINE_DATA:
1560                         case EXT2_ET_EXT_ATTR_CSUM_INVALID:
1561                         case EXT2_ET_EA_BAD_VALUE_OFFSET:
1562                         case EXT2_ET_EA_INODE_CORRUPTED:
1563                                 /* broken EA or no system.data EA; truncate */
1564                                 if (fix_problem(ctx, PR_1_INLINE_DATA_NO_ATTR,
1565                                                 &pctx)) {
1566                                         err = ext2fs_inode_size_set(fs, inode, 0);
1567                                         if (err) {
1568                                                 pctx.errcode = err;
1569                                                 ctx->flags |= E2F_FLAG_ABORT;
1570                                                 goto endit;
1571                                         }
1572                                         inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1573                                         memset(&inode->i_block, 0,
1574                                                sizeof(inode->i_block));
1575                                         e2fsck_write_inode(ctx, ino, inode,
1576                                                            "pass1");
1577                                         failed_csum = 0;
1578                                 }
1579                                 break;
1580                         default:
1581                                 /* Some other kind of non-xattr error? */
1582                                 pctx.errcode = err;
1583                                 ctx->flags |= E2F_FLAG_ABORT;
1584                                 goto endit;
1585                         }
1586                 }
1587
1588                 /*
1589                  * Test for incorrect extent flag settings.
1590                  *
1591                  * On big-endian machines we must be careful:
1592                  * When the inode is read, the i_block array is not swapped
1593                  * if the extent flag is set.  Therefore if we are testing
1594                  * for or fixing a wrongly-set flag, we must potentially
1595                  * (un)swap before testing, or after fixing.
1596                  */
1597
1598                 /*
1599                  * In this case the extents flag was set when read, so
1600                  * extent_header_verify is ok.  If the inode is cleared,
1601                  * no need to swap... so no extra swapping here.
1602                  */
1603                 if ((inode->i_flags & EXT4_EXTENTS_FL) && !extent_fs &&
1604                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1605                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO))) {
1606                         if ((ext2fs_extent_header_verify(inode->i_block,
1607                                                  sizeof(inode->i_block)) == 0) &&
1608                             fix_problem(ctx, PR_1_EXTENT_FEATURE, &pctx)) {
1609                                 ext2fs_set_feature_extents(sb);
1610                                 ext2fs_mark_super_dirty(fs);
1611                                 extent_fs = 1;
1612                         } else if (fix_problem(ctx, PR_1_EXTENTS_SET, &pctx)) {
1613                         clear_inode:
1614                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1615                                 if (ino == EXT2_BAD_INO)
1616                                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map,
1617                                                                  ino);
1618                                 /* skip FINISH_INODE_LOOP */
1619                                 continue;
1620                         }
1621                 }
1622
1623                 /*
1624                  * For big-endian machines:
1625                  * If the inode didn't have the extents flag set when it
1626                  * was read, then the i_blocks array was swapped.  To test
1627                  * as an extents header, we must swap it back first.
1628                  * IF we then set the extents flag, the entire i_block
1629                  * array must be un/re-swapped to make it proper extents data.
1630                  */
1631                 if (extent_fs && !(inode->i_flags & EXT4_EXTENTS_FL) &&
1632                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1633                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO)) &&
1634                     (LINUX_S_ISREG(inode->i_mode) ||
1635                      LINUX_S_ISDIR(inode->i_mode))) {
1636                         void *ehp;
1637 #ifdef WORDS_BIGENDIAN
1638                         __u32 tmp_block[EXT2_N_BLOCKS];
1639
1640                         for (i = 0; i < EXT2_N_BLOCKS; i++)
1641                                 tmp_block[i] = ext2fs_swab32(inode->i_block[i]);
1642                         ehp = tmp_block;
1643 #else
1644                         ehp = inode->i_block;
1645 #endif
1646                         if ((ext2fs_extent_header_verify(ehp,
1647                                          sizeof(inode->i_block)) == 0) &&
1648                             (fix_problem(ctx, PR_1_UNSET_EXTENT_FL, &pctx))) {
1649                                 inode->i_flags |= EXT4_EXTENTS_FL;
1650 #ifdef WORDS_BIGENDIAN
1651                                 memcpy(inode->i_block, tmp_block,
1652                                        sizeof(inode->i_block));
1653 #endif
1654                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1655                                 failed_csum = 0;
1656                         }
1657                 }
1658
1659                 if (ino == EXT2_BAD_INO) {
1660                         struct process_block_struct pb;
1661
1662                         if ((failed_csum || inode->i_mode || inode->i_uid ||
1663                              inode->i_gid || inode->i_links_count ||
1664                              (inode->i_flags & EXT4_INLINE_DATA_FL) ||
1665                              inode->i_file_acl) &&
1666                             fix_problem(ctx, PR_1_INVALID_BAD_INODE, &pctx)) {
1667                                 memset(inode, 0, sizeof(struct ext2_inode));
1668                                 e2fsck_write_inode(ctx, ino, inode,
1669                                                    "clear bad inode");
1670                                 failed_csum = 0;
1671                         }
1672
1673                         pctx.errcode = ext2fs_copy_bitmap(ctx->block_found_map,
1674                                                           &pb.fs_meta_blocks);
1675                         if (pctx.errcode) {
1676                                 pctx.num = 4;
1677                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1678                                 ctx->flags |= E2F_FLAG_ABORT;
1679                                 goto endit;
1680                         }
1681                         pb.ino = EXT2_BAD_INO;
1682                         pb.num_blocks = pb.last_block = 0;
1683                         pb.last_db_block = -1;
1684                         pb.num_illegal_blocks = 0;
1685                         pb.suppress = 0; pb.clear = 0; pb.is_dir = 0;
1686                         pb.is_reg = 0; pb.fragmented = 0; pb.bbcheck = 0;
1687                         pb.inode = inode;
1688                         pb.pctx = &pctx;
1689                         pb.ctx = ctx;
1690                         pctx.errcode = ext2fs_block_iterate3(fs, ino, 0,
1691                                      block_buf, process_bad_block, &pb);
1692                         ext2fs_free_block_bitmap(pb.fs_meta_blocks);
1693                         if (pctx.errcode) {
1694                                 fix_problem(ctx, PR_1_BLOCK_ITERATE, &pctx);
1695                                 ctx->flags |= E2F_FLAG_ABORT;
1696                                 goto endit;
1697                         }
1698                         if (pb.bbcheck)
1699                                 if (!fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK_PROMPT, &pctx)) {
1700                                 ctx->flags |= E2F_FLAG_ABORT;
1701                                 goto endit;
1702                         }
1703                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1704                         clear_problem_context(&pctx);
1705                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1706                         continue;
1707                 } else if (ino == EXT2_ROOT_INO) {
1708                         /*
1709                          * Make sure the root inode is a directory; if
1710                          * not, offer to clear it.  It will be
1711                          * regenerated in pass #3.
1712                          */
1713                         if (!LINUX_S_ISDIR(inode->i_mode)) {
1714                                 if (fix_problem(ctx, PR_1_ROOT_NO_DIR, &pctx))
1715                                         goto clear_inode;
1716                         }
1717                         /*
1718                          * If dtime is set, offer to clear it.  mke2fs
1719                          * version 0.2b created filesystems with the
1720                          * dtime field set for the root and lost+found
1721                          * directories.  We won't worry about
1722                          * /lost+found, since that can be regenerated
1723                          * easily.  But we will fix the root directory
1724                          * as a special case.
1725                          */
1726                         if (inode->i_dtime && inode->i_links_count) {
1727                                 if (fix_problem(ctx, PR_1_ROOT_DTIME, &pctx)) {
1728                                         inode->i_dtime = 0;
1729                                         e2fsck_write_inode(ctx, ino, inode,
1730                                                            "pass1");
1731                                         failed_csum = 0;
1732                                 }
1733                         }
1734                 } else if (ino == EXT2_JOURNAL_INO) {
1735                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1736                         if (fs->super->s_journal_inum == EXT2_JOURNAL_INO) {
1737                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1738                                     fix_problem(ctx, PR_1_JOURNAL_BAD_MODE,
1739                                                 &pctx)) {
1740                                         inode->i_mode = LINUX_S_IFREG;
1741                                         e2fsck_write_inode(ctx, ino, inode,
1742                                                            "pass1");
1743                                         failed_csum = 0;
1744                                 }
1745                                 check_blocks(ctx, &pctx, block_buf, NULL);
1746                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1747                                 continue;
1748                         }
1749                         if ((inode->i_links_count ||
1750                              inode->i_blocks || inode->i_block[0]) &&
1751                             fix_problem(ctx, PR_1_JOURNAL_INODE_NOT_CLEAR,
1752                                         &pctx)) {
1753                                 memset(inode, 0, inode_size);
1754                                 ext2fs_icount_store(ctx->inode_link_info,
1755                                                     ino, 0);
1756                                 e2fsck_write_inode_full(ctx, ino, inode,
1757                                                         inode_size, "pass1");
1758                                 failed_csum = 0;
1759                         }
1760                 } else if (quota_inum_is_reserved(fs, ino)) {
1761                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1762                         if (ext2fs_has_feature_quota(fs->super) &&
1763                             quota_inum_is_super(fs->super, ino)) {
1764                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1765                                     fix_problem(ctx, PR_1_QUOTA_BAD_MODE,
1766                                                         &pctx)) {
1767                                         inode->i_mode = LINUX_S_IFREG;
1768                                         e2fsck_write_inode(ctx, ino, inode,
1769                                                         "pass1");
1770                                         failed_csum = 0;
1771                                 }
1772                                 check_blocks(ctx, &pctx, block_buf, NULL);
1773                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1774                                 continue;
1775                         }
1776                         if ((inode->i_links_count ||
1777                              inode->i_blocks || inode->i_block[0]) &&
1778                             fix_problem(ctx, PR_1_QUOTA_INODE_NOT_CLEAR,
1779                                         &pctx)) {
1780                                 memset(inode, 0, inode_size);
1781                                 ext2fs_icount_store(ctx->inode_link_info,
1782                                                     ino, 0);
1783                                 e2fsck_write_inode_full(ctx, ino, inode,
1784                                                         inode_size, "pass1");
1785                                 failed_csum = 0;
1786                         }
1787                 } else if (ino == fs->super->s_orphan_file_inum) {
1788                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1789                         if (ext2fs_has_feature_orphan_file(fs->super)) {
1790                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1791                                     fix_problem(ctx, PR_1_ORPHAN_FILE_BAD_MODE,
1792                                                 &pctx)) {
1793                                         inode->i_mode = LINUX_S_IFREG;
1794                                         e2fsck_write_inode(ctx, ino, inode,
1795                                                            "pass1");
1796                                         failed_csum = 0;
1797                                 }
1798                                 check_blocks(ctx, &pctx, block_buf, NULL);
1799                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1800                                 continue;
1801                         }
1802                         if ((inode->i_links_count ||
1803                              inode->i_blocks || inode->i_block[0]) &&
1804                             fix_problem(ctx, PR_1_ORPHAN_FILE_NOT_CLEAR,
1805                                         &pctx)) {
1806                                 memset(inode, 0, inode_size);
1807                                 ext2fs_icount_store(ctx->inode_link_info, ino,
1808                                                     0);
1809                                 e2fsck_write_inode_full(ctx, ino, inode,
1810                                                         inode_size, "pass1");
1811                                 failed_csum = 0;
1812                         }
1813                 } else if (ino < EXT2_FIRST_INODE(fs->super)) {
1814                         problem_t problem = 0;
1815
1816                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1817                         if (ino == EXT2_BOOT_LOADER_INO) {
1818                                 if (LINUX_S_ISDIR(inode->i_mode))
1819                                         problem = PR_1_RESERVED_BAD_MODE;
1820                         } else if (ino == EXT2_RESIZE_INO) {
1821                                 if (inode->i_mode &&
1822                                     !LINUX_S_ISREG(inode->i_mode))
1823                                         problem = PR_1_RESERVED_BAD_MODE;
1824                         } else {
1825                                 if (inode->i_mode != 0)
1826                                         problem = PR_1_RESERVED_BAD_MODE;
1827                         }
1828                         if (problem) {
1829                                 if (fix_problem(ctx, problem, &pctx)) {
1830                                         inode->i_mode = 0;
1831                                         e2fsck_write_inode(ctx, ino, inode,
1832                                                            "pass1");
1833                                         failed_csum = 0;
1834                                 }
1835                         }
1836                         check_blocks(ctx, &pctx, block_buf, NULL);
1837                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1838                         continue;
1839                 }
1840
1841                 if (!inode->i_links_count) {
1842                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1843                         continue;
1844                 }
1845                 /*
1846                  * n.b.  0.3c ext2fs code didn't clear i_links_count for
1847                  * deleted files.  Oops.
1848                  *
1849                  * Since all new ext2 implementations get this right,
1850                  * we now assume that the case of non-zero
1851                  * i_links_count and non-zero dtime means that we
1852                  * should keep the file, not delete it.
1853                  *
1854                  */
1855                 if (inode->i_dtime) {
1856                         if (fix_problem(ctx, PR_1_SET_DTIME, &pctx)) {
1857                                 inode->i_dtime = 0;
1858                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1859                                 failed_csum = 0;
1860                         }
1861                 }
1862
1863                 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1864                 switch (fs->super->s_creator_os) {
1865                     case EXT2_OS_HURD:
1866                         frag = inode->osd2.hurd2.h_i_frag;
1867                         fsize = inode->osd2.hurd2.h_i_fsize;
1868                         break;
1869                     default:
1870                         frag = fsize = 0;
1871                 }
1872
1873                 if (inode->i_faddr || frag || fsize ||
1874                     (!ext2fs_has_feature_largedir(fs->super) &&
1875                     (LINUX_S_ISDIR(inode->i_mode) && inode->i_size_high)))
1876                         mark_inode_bad(ctx, ino);
1877                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1878                     !ext2fs_has_feature_64bit(fs->super) &&
1879                     inode->osd2.linux2.l_i_file_acl_high != 0)
1880                         mark_inode_bad(ctx, ino);
1881                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1882                     !ext2fs_has_feature_huge_file(fs->super) &&
1883                     (inode->osd2.linux2.l_i_blocks_hi != 0))
1884                         mark_inode_bad(ctx, ino);
1885                 if (inode->i_flags & EXT2_IMAGIC_FL) {
1886                         if (imagic_fs) {
1887                                 if (!ctx->inode_imagic_map)
1888                                         alloc_imagic_map(ctx);
1889                                 ext2fs_mark_inode_bitmap2(ctx->inode_imagic_map,
1890                                                          ino);
1891                         } else {
1892                                 if (fix_problem(ctx, PR_1_SET_IMAGIC, &pctx)) {
1893                                         inode->i_flags &= ~EXT2_IMAGIC_FL;
1894                                         e2fsck_write_inode(ctx, ino,
1895                                                            inode, "pass1");
1896                                         failed_csum = 0;
1897                                 }
1898                         }
1899                 }
1900
1901                 check_inode_extra_space(ctx, &pctx, &ea_ibody_quota);
1902                 check_is_really_dir(ctx, &pctx, block_buf);
1903
1904                 /*
1905                  * ext2fs_inode_has_valid_blocks2 does not actually look
1906                  * at i_block[] values, so not endian-sensitive here.
1907                  */
1908                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL) &&
1909                     LINUX_S_ISLNK(inode->i_mode) &&
1910                     !ext2fs_inode_has_valid_blocks2(fs, inode) &&
1911                     fix_problem(ctx, PR_1_FAST_SYMLINK_EXTENT_FL, &pctx)) {
1912                         inode->i_flags &= ~EXT4_EXTENTS_FL;
1913                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1914                         failed_csum = 0;
1915                 }
1916
1917                 if ((inode->i_flags & EXT4_ENCRYPT_FL) &&
1918                     add_encrypted_file(ctx, &pctx) < 0)
1919                         goto clear_inode;
1920
1921                 if (casefold_fs && inode->i_flags & EXT4_CASEFOLD_FL)
1922                         ext2fs_mark_inode_bitmap2(ctx->inode_casefold_map, ino);
1923
1924                 if (LINUX_S_ISDIR(inode->i_mode)) {
1925                         ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
1926                         e2fsck_add_dir_info(ctx, ino, 0);
1927                         ctx->fs_directory_count++;
1928                         if (inode->i_flags & EXT4_CASEFOLD_FL)
1929                                 add_casefolded_dir(ctx, ino);
1930                 } else if (LINUX_S_ISREG (inode->i_mode)) {
1931                         ext2fs_mark_inode_bitmap2(ctx->inode_reg_map, ino);
1932                         ctx->fs_regular_count++;
1933                 } else if (LINUX_S_ISCHR (inode->i_mode) &&
1934                            e2fsck_pass1_check_device_inode(fs, inode)) {
1935                         check_extents_inlinedata(ctx, &pctx);
1936                         check_immutable(ctx, &pctx);
1937                         check_size(ctx, &pctx);
1938                         ctx->fs_chardev_count++;
1939                 } else if (LINUX_S_ISBLK (inode->i_mode) &&
1940                            e2fsck_pass1_check_device_inode(fs, inode)) {
1941                         check_extents_inlinedata(ctx, &pctx);
1942                         check_immutable(ctx, &pctx);
1943                         check_size(ctx, &pctx);
1944                         ctx->fs_blockdev_count++;
1945                 } else if (LINUX_S_ISLNK (inode->i_mode) &&
1946                            e2fsck_pass1_check_symlink(fs, ino, inode,
1947                                                       block_buf)) {
1948                         check_immutable(ctx, &pctx);
1949                         ctx->fs_symlinks_count++;
1950                         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
1951                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1952                                 continue;
1953                         } else if (ext2fs_is_fast_symlink(inode)) {
1954                                 ctx->fs_fast_symlinks_count++;
1955                                 check_blocks(ctx, &pctx, block_buf,
1956                                              &ea_ibody_quota);
1957                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1958                                 continue;
1959                         }
1960                 }
1961                 else if (LINUX_S_ISFIFO (inode->i_mode) &&
1962                          e2fsck_pass1_check_device_inode(fs, inode)) {
1963                         check_extents_inlinedata(ctx, &pctx);
1964                         check_immutable(ctx, &pctx);
1965                         check_size(ctx, &pctx);
1966                         ctx->fs_fifo_count++;
1967                 } else if ((LINUX_S_ISSOCK (inode->i_mode)) &&
1968                            e2fsck_pass1_check_device_inode(fs, inode)) {
1969                         check_extents_inlinedata(ctx, &pctx);
1970                         check_immutable(ctx, &pctx);
1971                         check_size(ctx, &pctx);
1972                         ctx->fs_sockets_count++;
1973                 } else
1974                         mark_inode_bad(ctx, ino);
1975                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1976                     !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
1977                         if (inode->i_block[EXT2_IND_BLOCK])
1978                                 ctx->fs_ind_count++;
1979                         if (inode->i_block[EXT2_DIND_BLOCK])
1980                                 ctx->fs_dind_count++;
1981                         if (inode->i_block[EXT2_TIND_BLOCK])
1982                                 ctx->fs_tind_count++;
1983                 }
1984                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1985                     !(inode->i_flags & EXT4_INLINE_DATA_FL) &&
1986                     (inode->i_block[EXT2_IND_BLOCK] ||
1987                      inode->i_block[EXT2_DIND_BLOCK] ||
1988                      inode->i_block[EXT2_TIND_BLOCK] ||
1989                      ext2fs_file_acl_block(fs, inode))) {
1990                         struct process_inode_block *itp;
1991
1992                         itp = &inodes_to_process[process_inode_count];
1993                         itp->ino = ino;
1994                         itp->ea_ibody_quota = ea_ibody_quota;
1995                         if (inode_size < sizeof(struct ext2_inode_large))
1996                                 memcpy(&itp->inode, inode, inode_size);
1997                         else
1998                                 memcpy(&itp->inode, inode, sizeof(itp->inode));
1999                         process_inode_count++;
2000                 } else
2001                         check_blocks(ctx, &pctx, block_buf, &ea_ibody_quota);
2002
2003                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
2004
2005                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2006                         goto endit;
2007
2008                 if (process_inode_count >= ctx->process_inode_size) {
2009                         process_inodes(ctx, block_buf);
2010
2011                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2012                                 goto endit;
2013                 }
2014         }
2015         process_inodes(ctx, block_buf);
2016         ext2fs_close_inode_scan(scan);
2017         scan = NULL;
2018
2019         reserve_block_for_root_repair(ctx);
2020         reserve_block_for_lnf_repair(ctx);
2021
2022         /*
2023          * If any extended attribute blocks' reference counts need to
2024          * be adjusted, either up (ctx->refcount_extra), or down
2025          * (ctx->refcount), then fix them.
2026          */
2027         if (ctx->refcount) {
2028                 adjust_extattr_refcount(ctx, ctx->refcount, block_buf, -1);
2029                 ea_refcount_free(ctx->refcount);
2030                 ctx->refcount = 0;
2031         }
2032         if (ctx->refcount_extra) {
2033                 adjust_extattr_refcount(ctx, ctx->refcount_extra,
2034                                         block_buf, +1);
2035                 ea_refcount_free(ctx->refcount_extra);
2036                 ctx->refcount_extra = 0;
2037         }
2038
2039         if (ctx->ea_block_quota_blocks) {
2040                 ea_refcount_free(ctx->ea_block_quota_blocks);
2041                 ctx->ea_block_quota_blocks = 0;
2042         }
2043
2044         if (ctx->ea_block_quota_inodes) {
2045                 ea_refcount_free(ctx->ea_block_quota_inodes);
2046                 ctx->ea_block_quota_inodes = 0;
2047         }
2048
2049         if (ctx->invalid_bitmaps)
2050                 handle_fs_bad_blocks(ctx);
2051
2052         /* We don't need the block_ea_map any more */
2053         if (ctx->block_ea_map) {
2054                 ext2fs_free_block_bitmap(ctx->block_ea_map);
2055                 ctx->block_ea_map = 0;
2056         }
2057
2058         /* We don't need the encryption policy => ID map any more */
2059         destroy_encryption_policy_map(ctx);
2060
2061         if (ctx->flags & E2F_FLAG_RESIZE_INODE) {
2062                 clear_problem_context(&pctx);
2063                 pctx.errcode = ext2fs_create_resize_inode(fs);
2064                 if (pctx.errcode) {
2065                         if (!fix_problem(ctx, PR_1_RESIZE_INODE_CREATE,
2066                                          &pctx)) {
2067                                 ctx->flags |= E2F_FLAG_ABORT;
2068                                 goto endit;
2069                         }
2070                         pctx.errcode = 0;
2071                 }
2072                 if (!pctx.errcode) {
2073                         e2fsck_read_inode(ctx, EXT2_RESIZE_INO, inode,
2074                                           "recreate inode");
2075                         inode->i_mtime = ctx->now;
2076                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, inode,
2077                                            "recreate inode");
2078                 }
2079                 ctx->flags &= ~E2F_FLAG_RESIZE_INODE;
2080         }
2081
2082         if (ctx->flags & E2F_FLAG_RESTART) {
2083                 /*
2084                  * Only the master copy of the superblock and block
2085                  * group descriptors are going to be written during a
2086                  * restart, so set the superblock to be used to be the
2087                  * master superblock.
2088                  */
2089                 ctx->use_superblock = 0;
2090                 goto endit;
2091         }
2092
2093         if (ctx->large_dirs && !ext2fs_has_feature_largedir(fs->super)) {
2094                 if (fix_problem(ctx, PR_2_FEATURE_LARGE_DIRS, &pctx)) {
2095                         ext2fs_set_feature_largedir(fs->super);
2096                         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2097                         ext2fs_mark_super_dirty(fs);
2098                 }
2099                 if (fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
2100                     fix_problem(ctx, PR_1_FS_REV_LEVEL, &pctx)) {
2101                         ext2fs_update_dynamic_rev(fs);
2102                         ext2fs_mark_super_dirty(fs);
2103                 }
2104         }
2105
2106         if (ctx->block_dup_map) {
2107                 if (ctx->options & E2F_OPT_PREEN) {
2108                         clear_problem_context(&pctx);
2109                         fix_problem(ctx, PR_1_DUP_BLOCKS_PREENSTOP, &pctx);
2110                 }
2111                 e2fsck_pass1_dupblocks(ctx, block_buf);
2112         }
2113         ctx->flags |= E2F_FLAG_ALLOC_OK;
2114 endit:
2115         e2fsck_use_inode_shortcuts(ctx, 0);
2116         ext2fs_free_mem(&inodes_to_process);
2117         inodes_to_process = 0;
2118
2119         if (scan)
2120                 ext2fs_close_inode_scan(scan);
2121         if (block_buf)
2122                 ext2fs_free_mem(&block_buf);
2123         if (inode)
2124                 ext2fs_free_mem(&inode);
2125
2126         /*
2127          * The l+f inode may have been cleared, so zap it now and
2128          * later passes will recalculate it if necessary
2129          */
2130         ctx->lost_and_found = 0;
2131
2132         if ((ctx->flags & E2F_FLAG_SIGNAL_MASK) == 0)
2133                 print_resource_track(ctx, _("Pass 1"), &rtrack, ctx->fs->io);
2134         else
2135                 ctx->invalid_bitmaps++;
2136 }
2137 #undef FINISH_INODE_LOOP
2138
2139 /*
2140  * When the inode_scan routines call this callback at the end of the
2141  * glock group, call process_inodes.
2142  */
2143 static errcode_t scan_callback(ext2_filsys fs,
2144                                ext2_inode_scan scan EXT2FS_ATTR((unused)),
2145                                dgrp_t group, void * priv_data)
2146 {
2147         struct scan_callback_struct *scan_struct;
2148         e2fsck_t ctx;
2149
2150         scan_struct = (struct scan_callback_struct *) priv_data;
2151         ctx = scan_struct->ctx;
2152
2153         process_inodes((e2fsck_t) fs->priv_data, scan_struct->block_buf);
2154
2155         if (ctx->progress)
2156                 if ((ctx->progress)(ctx, 1, group+1,
2157                                     ctx->fs->group_desc_count))
2158                         return EXT2_ET_CANCEL_REQUESTED;
2159
2160         return 0;
2161 }
2162
2163 /*
2164  * Process the inodes in the "inodes to process" list.
2165  */
2166 static void process_inodes(e2fsck_t ctx, char *block_buf)
2167 {
2168         int                     i;
2169         struct ext2_inode       *old_stashed_inode;
2170         ext2_ino_t              old_stashed_ino;
2171         const char              *old_operation;
2172         char                    buf[80];
2173         struct problem_context  pctx;
2174
2175 #if 0
2176         printf("begin process_inodes: ");
2177 #endif
2178         if (process_inode_count == 0)
2179                 return;
2180         old_operation = ehandler_operation(0);
2181         old_stashed_inode = ctx->stashed_inode;
2182         old_stashed_ino = ctx->stashed_ino;
2183         qsort(inodes_to_process, process_inode_count,
2184                       sizeof(struct process_inode_block), process_inode_cmp);
2185         clear_problem_context(&pctx);
2186         for (i=0; i < process_inode_count; i++) {
2187                 pctx.inode = ctx->stashed_inode =
2188                         (struct ext2_inode *) &inodes_to_process[i].inode;
2189                 pctx.ino = ctx->stashed_ino = inodes_to_process[i].ino;
2190
2191 #if 0
2192                 printf("%u ", pctx.ino);
2193 #endif
2194                 sprintf(buf, _("reading indirect blocks of inode %u"),
2195                         pctx.ino);
2196                 ehandler_operation(buf);
2197                 check_blocks(ctx, &pctx, block_buf,
2198                              &inodes_to_process[i].ea_ibody_quota);
2199                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2200                         break;
2201         }
2202         ctx->stashed_inode = old_stashed_inode;
2203         ctx->stashed_ino = old_stashed_ino;
2204         process_inode_count = 0;
2205 #if 0
2206         printf("end process inodes\n");
2207 #endif
2208         ehandler_operation(old_operation);
2209 }
2210
2211 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b)
2212 {
2213         const struct process_inode_block *ib_a =
2214                 (const struct process_inode_block *) a;
2215         const struct process_inode_block *ib_b =
2216                 (const struct process_inode_block *) b;
2217         int     ret;
2218
2219         ret = (ib_a->inode.i_block[EXT2_IND_BLOCK] -
2220                ib_b->inode.i_block[EXT2_IND_BLOCK]);
2221         if (ret == 0)
2222                 /*
2223                  * We only call process_inodes() for non-extent
2224                  * inodes, so it's OK to pass NULL to
2225                  * ext2fs_file_acl_block() here.
2226                  */
2227                 ret = ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_a->inode)) -
2228                         ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_b->inode));
2229         if (ret == 0)
2230                 ret = ib_a->ino - ib_b->ino;
2231         return ret;
2232 }
2233
2234 /*
2235  * Mark an inode as being bad in some what
2236  */
2237 static void mark_inode_bad(e2fsck_t ctx, ino_t ino)
2238 {
2239         struct          problem_context pctx;
2240
2241         if (!ctx->inode_bad_map) {
2242                 clear_problem_context(&pctx);
2243
2244                 pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2245                                 _("bad inode map"), EXT2FS_BMAP64_RBTREE,
2246                                 "inode_bad_map", &ctx->inode_bad_map);
2247                 if (pctx.errcode) {
2248                         pctx.num = 3;
2249                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2250                         /* Should never get here */
2251                         ctx->flags |= E2F_FLAG_ABORT;
2252                         return;
2253                 }
2254         }
2255         ext2fs_mark_inode_bitmap2(ctx->inode_bad_map, ino);
2256 }
2257
2258 static void add_casefolded_dir(e2fsck_t ctx, ino_t ino)
2259 {
2260         struct          problem_context pctx;
2261
2262         if (!ctx->casefolded_dirs) {
2263                 pctx.errcode = ext2fs_u32_list_create(&ctx->casefolded_dirs, 0);
2264                 if (pctx.errcode)
2265                         goto error;
2266         }
2267         pctx.errcode = ext2fs_u32_list_add(ctx->casefolded_dirs, ino);
2268         if (pctx.errcode == 0)
2269                 return;
2270 error:
2271         fix_problem(ctx, PR_1_ALLOCATE_CASEFOLDED_DIRLIST, &pctx);
2272         /* Should never get here */
2273         ctx->flags |= E2F_FLAG_ABORT;
2274 }
2275
2276 /*
2277  * This procedure will allocate the inode "bb" (badblock) map table
2278  */
2279 static void alloc_bb_map(e2fsck_t ctx)
2280 {
2281         struct          problem_context pctx;
2282
2283         clear_problem_context(&pctx);
2284         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2285                         _("inode in bad block map"), EXT2FS_BMAP64_RBTREE,
2286                         "inode_bb_map", &ctx->inode_bb_map);
2287         if (pctx.errcode) {
2288                 pctx.num = 4;
2289                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2290                 /* Should never get here */
2291                 ctx->flags |= E2F_FLAG_ABORT;
2292                 return;
2293         }
2294 }
2295
2296 /*
2297  * This procedure will allocate the inode imagic table
2298  */
2299 static void alloc_imagic_map(e2fsck_t ctx)
2300 {
2301         struct          problem_context pctx;
2302
2303         clear_problem_context(&pctx);
2304         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2305                         _("imagic inode map"), EXT2FS_BMAP64_RBTREE,
2306                         "inode_imagic_map", &ctx->inode_imagic_map);
2307         if (pctx.errcode) {
2308                 pctx.num = 5;
2309                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2310                 /* Should never get here */
2311                 ctx->flags |= E2F_FLAG_ABORT;
2312                 return;
2313         }
2314 }
2315
2316 /*
2317  * Marks a block as in use, setting the dup_map if it's been set
2318  * already.  Called by process_block and process_bad_block.
2319  *
2320  * WARNING: Assumes checks have already been done to make sure block
2321  * is valid.  This is true in both process_block and process_bad_block.
2322  */
2323 static _INLINE_ void mark_block_used(e2fsck_t ctx, blk64_t block)
2324 {
2325         struct          problem_context pctx;
2326
2327         clear_problem_context(&pctx);
2328
2329         if (ext2fs_fast_test_block_bitmap2(ctx->block_found_map, block)) {
2330                 if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2331                     !(ctx->options & E2F_OPT_UNSHARE_BLOCKS)) {
2332                         return;
2333                 }
2334                 if (!ctx->block_dup_map) {
2335                         pctx.errcode = e2fsck_allocate_block_bitmap(ctx->fs,
2336                                         _("multiply claimed block map"),
2337                                         EXT2FS_BMAP64_RBTREE, "block_dup_map",
2338                                         &ctx->block_dup_map);
2339                         if (pctx.errcode) {
2340                                 pctx.num = 3;
2341                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR,
2342                                             &pctx);
2343                                 /* Should never get here */
2344                                 ctx->flags |= E2F_FLAG_ABORT;
2345                                 return;
2346                         }
2347                 }
2348                 ext2fs_fast_mark_block_bitmap2(ctx->block_dup_map, block);
2349         } else {
2350                 ext2fs_fast_mark_block_bitmap2(ctx->block_found_map, block);
2351         }
2352 }
2353
2354 /*
2355  * When cluster size is greater than one block, it is caller's responsibility
2356  * to make sure block parameter starts at a cluster boundary.
2357  */
2358 static _INLINE_ void mark_blocks_used(e2fsck_t ctx, blk64_t block,
2359                                       unsigned int num)
2360 {
2361         if (ext2fs_test_block_bitmap_range2(ctx->block_found_map, block, num))
2362                 ext2fs_mark_block_bitmap_range2(ctx->block_found_map, block, num);
2363         else {
2364                 unsigned int i;
2365
2366                 for (i = 0; i < num; i += EXT2FS_CLUSTER_RATIO(ctx->fs))
2367                         mark_block_used(ctx, block + i);
2368         }
2369 }
2370
2371 /*
2372  * Adjust the extended attribute block's reference counts at the end
2373  * of pass 1, either by subtracting out references for EA blocks that
2374  * are still referenced in ctx->refcount, or by adding references for
2375  * EA blocks that had extra references as accounted for in
2376  * ctx->refcount_extra.
2377  */
2378 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
2379                                     char *block_buf, int adjust_sign)
2380 {
2381         struct ext2_ext_attr_header     *header;
2382         struct problem_context          pctx;
2383         ext2_filsys                     fs = ctx->fs;
2384         blk64_t                         blk;
2385         __u32                           should_be;
2386         ea_value_t                      count;
2387
2388         clear_problem_context(&pctx);
2389
2390         ea_refcount_intr_begin(refcount);
2391         while (1) {
2392                 if ((blk = ea_refcount_intr_next(refcount, &count)) == 0)
2393                         break;
2394                 pctx.blk = blk;
2395                 pctx.errcode = ext2fs_read_ext_attr3(fs, blk, block_buf,
2396                                                      pctx.ino);
2397                 if (pctx.errcode) {
2398                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
2399                         return;
2400                 }
2401                 header = (struct ext2_ext_attr_header *) block_buf;
2402                 pctx.blkcount = header->h_refcount;
2403                 should_be = header->h_refcount + adjust_sign * (int)count;
2404                 pctx.num = should_be;
2405                 if (fix_problem(ctx, PR_1_EXTATTR_REFCOUNT, &pctx)) {
2406                         header->h_refcount = should_be;
2407                         pctx.errcode = ext2fs_write_ext_attr3(fs, blk,
2408                                                              block_buf,
2409                                                              pctx.ino);
2410                         if (pctx.errcode) {
2411                                 fix_problem(ctx, PR_1_EXTATTR_WRITE_ABORT,
2412                                             &pctx);
2413                                 continue;
2414                         }
2415                 }
2416         }
2417 }
2418
2419 /*
2420  * Handle processing the extended attribute blocks
2421  */
2422 static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx,
2423                            char *block_buf, struct ea_quota *ea_block_quota)
2424 {
2425         ext2_filsys fs = ctx->fs;
2426         ext2_ino_t      ino = pctx->ino;
2427         struct ext2_inode *inode = pctx->inode;
2428         blk64_t         blk;
2429         char *          end;
2430         struct ext2_ext_attr_header *header;
2431         struct ext2_ext_attr_entry *first, *entry;
2432         blk64_t         quota_blocks = EXT2FS_C2B(fs, 1);
2433         __u64           quota_inodes = 0;
2434         region_t        region = 0;
2435         int             failed_csum = 0;
2436
2437         ea_block_quota->blocks = 0;
2438         ea_block_quota->inodes = 0;
2439
2440         blk = ext2fs_file_acl_block(fs, inode);
2441         if (blk == 0)
2442                 return 0;
2443
2444         /*
2445          * If the Extended attribute flag isn't set, then a non-zero
2446          * file acl means that the inode is corrupted.
2447          *
2448          * Or if the extended attribute block is an invalid block,
2449          * then the inode is also corrupted.
2450          */
2451         if (!ext2fs_has_feature_xattr(fs->super) ||
2452             (blk < fs->super->s_first_data_block) ||
2453             (blk >= ext2fs_blocks_count(fs->super))) {
2454                 mark_inode_bad(ctx, ino);
2455                 return 0;
2456         }
2457
2458         /* If ea bitmap hasn't been allocated, create it */
2459         if (!ctx->block_ea_map) {
2460                 pctx->errcode = e2fsck_allocate_block_bitmap(fs,
2461                                         _("ext attr block map"),
2462                                         EXT2FS_BMAP64_RBTREE, "block_ea_map",
2463                                         &ctx->block_ea_map);
2464                 if (pctx->errcode) {
2465                         pctx->num = 2;
2466                         fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, pctx);
2467                         ctx->flags |= E2F_FLAG_ABORT;
2468                         return 0;
2469                 }
2470         }
2471
2472         /* Create the EA refcount structure if necessary */
2473         if (!ctx->refcount) {
2474                 pctx->errcode = ea_refcount_create(0, &ctx->refcount);
2475                 if (pctx->errcode) {
2476                         pctx->num = 1;
2477                         fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2478                         ctx->flags |= E2F_FLAG_ABORT;
2479                         return 0;
2480                 }
2481         }
2482
2483 #if 0
2484         /* Debugging text */
2485         printf("Inode %u has EA block %u\n", ino, blk);
2486 #endif
2487
2488         /* Have we seen this EA block before? */
2489         if (ext2fs_fast_test_block_bitmap2(ctx->block_ea_map, blk)) {
2490                 ea_block_quota->blocks = EXT2FS_C2B(fs, 1);
2491                 ea_block_quota->inodes = 0;
2492
2493                 if (ctx->ea_block_quota_blocks) {
2494                         ea_refcount_fetch(ctx->ea_block_quota_blocks, blk,
2495                                           &quota_blocks);
2496                         if (quota_blocks)
2497                                 ea_block_quota->blocks = quota_blocks;
2498                 }
2499
2500                 if (ctx->ea_block_quota_inodes)
2501                         ea_refcount_fetch(ctx->ea_block_quota_inodes, blk,
2502                                           &ea_block_quota->inodes);
2503
2504                 if (ea_refcount_decrement(ctx->refcount, blk, 0) == 0)
2505                         return 1;
2506                 /* Ooops, this EA was referenced more than it stated */
2507                 if (!ctx->refcount_extra) {
2508                         pctx->errcode = ea_refcount_create(0,
2509                                            &ctx->refcount_extra);
2510                         if (pctx->errcode) {
2511                                 pctx->num = 2;
2512                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2513                                 ctx->flags |= E2F_FLAG_ABORT;
2514                                 return 0;
2515                         }
2516                 }
2517                 ea_refcount_increment(ctx->refcount_extra, blk, 0);
2518                 return 1;
2519         }
2520
2521         /*
2522          * OK, we haven't seen this EA block yet.  So we need to
2523          * validate it
2524          */
2525         pctx->blk = blk;
2526         pctx->errcode = ext2fs_read_ext_attr3(fs, blk, block_buf, pctx->ino);
2527         if (pctx->errcode == EXT2_ET_EXT_ATTR_CSUM_INVALID) {
2528                 pctx->errcode = 0;
2529                 failed_csum = 1;
2530         } else if (pctx->errcode == EXT2_ET_BAD_EA_HEADER)
2531                 pctx->errcode = 0;
2532
2533         if (pctx->errcode &&
2534             fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx)) {
2535                 pctx->errcode = 0;
2536                 goto clear_extattr;
2537         }
2538         header = (struct ext2_ext_attr_header *) block_buf;
2539         pctx->blk = ext2fs_file_acl_block(fs, inode);
2540         if (((ctx->ext_attr_ver == 1) &&
2541              (header->h_magic != EXT2_EXT_ATTR_MAGIC_v1)) ||
2542             ((ctx->ext_attr_ver == 2) &&
2543              (header->h_magic != EXT2_EXT_ATTR_MAGIC))) {
2544                 if (fix_problem(ctx, PR_1_BAD_EA_BLOCK, pctx))
2545                         goto clear_extattr;
2546         }
2547
2548         if (header->h_blocks != 1) {
2549                 if (fix_problem(ctx, PR_1_EA_MULTI_BLOCK, pctx))
2550                         goto clear_extattr;
2551         }
2552
2553         if (pctx->errcode && fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx))
2554                 goto clear_extattr;
2555
2556         region = region_create(0, fs->blocksize);
2557         if (!region) {
2558                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
2559                 ctx->flags |= E2F_FLAG_ABORT;
2560                 return 0;
2561         }
2562         if (region_allocate(region, 0, sizeof(struct ext2_ext_attr_header))) {
2563                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2564                         goto clear_extattr;
2565         }
2566
2567         first = (struct ext2_ext_attr_entry *)(header+1);
2568         end = block_buf + fs->blocksize;
2569         entry = first;
2570         while ((char *)entry < end && *(__u32 *)entry) {
2571                 __u32 hash;
2572
2573                 if (region_allocate(region, (char *)entry - (char *)header,
2574                                    EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
2575                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2576                                 goto clear_extattr;
2577                         break;
2578                 }
2579                 if ((ctx->ext_attr_ver == 1 &&
2580                      (entry->e_name_len == 0 || entry->e_name_index != 0)) ||
2581                     (ctx->ext_attr_ver == 2 &&
2582                      entry->e_name_index == 0)) {
2583                         if (fix_problem(ctx, PR_1_EA_BAD_NAME, pctx))
2584                                 goto clear_extattr;
2585                         break;
2586                 }
2587                 if (entry->e_value_inum == 0) {
2588                         if (entry->e_value_size > EXT2_XATTR_SIZE_MAX ||
2589                             (entry->e_value_offs + entry->e_value_size >
2590                              fs->blocksize)) {
2591                                 if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2592                                         goto clear_extattr;
2593                                 break;
2594                         }
2595                         if (entry->e_value_size &&
2596                             region_allocate(region, entry->e_value_offs,
2597                                             EXT2_EXT_ATTR_SIZE(entry->e_value_size))) {
2598                                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION,
2599                                                 pctx))
2600                                         goto clear_extattr;
2601                         }
2602
2603                         hash = ext2fs_ext_attr_hash_entry(entry, block_buf +
2604                                                           entry->e_value_offs);
2605
2606                         if (entry->e_hash != hash) {
2607                                 pctx->num = entry->e_hash;
2608                                 if (fix_problem(ctx, PR_1_ATTR_HASH, pctx))
2609                                         goto clear_extattr;
2610                                 entry->e_hash = hash;
2611                         }
2612                 } else {
2613                         problem_t problem;
2614                         blk64_t entry_quota_blocks;
2615
2616                         problem = check_large_ea_inode(ctx, entry, pctx,
2617                                                        &entry_quota_blocks);
2618                         if (problem && fix_problem(ctx, problem, pctx))
2619                                 goto clear_extattr;
2620
2621                         quota_blocks += entry_quota_blocks;
2622                         quota_inodes++;
2623                 }
2624
2625                 entry = EXT2_EXT_ATTR_NEXT(entry);
2626         }
2627         if (region_allocate(region, (char *)entry - (char *)header, 4)) {
2628                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2629                         goto clear_extattr;
2630         }
2631         region_free(region);
2632
2633         /*
2634          * We only get here if there was no other errors that were fixed.
2635          * If there was a checksum fail, ask to correct it.
2636          */
2637         if (failed_csum &&
2638             fix_problem(ctx, PR_1_EA_BLOCK_ONLY_CSUM_INVALID, pctx)) {
2639                 pctx->errcode = ext2fs_write_ext_attr3(fs, blk, block_buf,
2640                                                        pctx->ino);
2641                 if (pctx->errcode)
2642                         return 0;
2643         }
2644
2645         if (quota_blocks != EXT2FS_C2B(fs, 1U)) {
2646                 if (!ctx->ea_block_quota_blocks) {
2647                         pctx->errcode = ea_refcount_create(0,
2648                                                 &ctx->ea_block_quota_blocks);
2649                         if (pctx->errcode) {
2650                                 pctx->num = 3;
2651                                 goto refcount_fail;
2652                         }
2653                 }
2654                 ea_refcount_store(ctx->ea_block_quota_blocks, blk,
2655                                   quota_blocks);
2656         }
2657
2658         if (quota_inodes) {
2659                 if (!ctx->ea_block_quota_inodes) {
2660                         pctx->errcode = ea_refcount_create(0,
2661                                                 &ctx->ea_block_quota_inodes);
2662                         if (pctx->errcode) {
2663                                 pctx->num = 4;
2664 refcount_fail:
2665                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2666                                 ctx->flags |= E2F_FLAG_ABORT;
2667                                 return 0;
2668                         }
2669                 }
2670
2671                 ea_refcount_store(ctx->ea_block_quota_inodes, blk,
2672                                   quota_inodes);
2673         }
2674         ea_block_quota->blocks = quota_blocks;
2675         ea_block_quota->inodes = quota_inodes;
2676
2677         inc_ea_inode_refs(ctx, pctx, first, end);
2678         ea_refcount_store(ctx->refcount, blk, header->h_refcount - 1);
2679         mark_block_used(ctx, blk);
2680         ext2fs_fast_mark_block_bitmap2(ctx->block_ea_map, blk);
2681         return 1;
2682
2683 clear_extattr:
2684         if (region)
2685                 region_free(region);
2686         ext2fs_file_acl_block_set(fs, inode, 0);
2687         e2fsck_write_inode(ctx, ino, inode, "check_ext_attr");
2688         return 0;
2689 }
2690
2691 /* Returns 1 if bad htree, 0 if OK */
2692 static int handle_htree(e2fsck_t ctx, struct problem_context *pctx,
2693                         ext2_ino_t ino, struct ext2_inode *inode,
2694                         char *block_buf)
2695 {
2696         struct ext2_dx_root_info        *root;
2697         ext2_filsys                     fs = ctx->fs;
2698         errcode_t                       retval;
2699         blk64_t                         blk;
2700
2701         if ((!LINUX_S_ISDIR(inode->i_mode) &&
2702              fix_problem(ctx, PR_1_HTREE_NODIR, pctx)) ||
2703             (!ext2fs_has_feature_dir_index(fs->super) &&
2704              fix_problem(ctx, PR_1_HTREE_SET, pctx)))
2705                 return 1;
2706
2707         pctx->errcode = ext2fs_bmap2(fs, ino, inode, 0, 0, 0, 0, &blk);
2708
2709         if ((pctx->errcode) ||
2710             (blk == 0) ||
2711             (blk < fs->super->s_first_data_block) ||
2712             (blk >= ext2fs_blocks_count(fs->super))) {
2713                 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2714                         return 1;
2715                 else
2716                         return 0;
2717         }
2718
2719         retval = io_channel_read_blk64(fs->io, blk, 1, block_buf);
2720         if (retval && fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2721                 return 1;
2722
2723         /* XXX should check that beginning matches a directory */
2724         root = (struct ext2_dx_root_info *) (block_buf + 24);
2725
2726         if ((root->reserved_zero || root->info_length < 8) &&
2727             fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2728                 return 1;
2729
2730         pctx->num = root->hash_version;
2731         if ((root->hash_version != EXT2_HASH_LEGACY) &&
2732             (root->hash_version != EXT2_HASH_HALF_MD4) &&
2733             (root->hash_version != EXT2_HASH_TEA) &&
2734             (root->hash_version != EXT2_HASH_SIPHASH) &&
2735             fix_problem(ctx, PR_1_HTREE_HASHV, pctx))
2736                 return 1;
2737
2738         if (ext4_hash_in_dirent(inode)) {
2739                 if (root->hash_version != EXT2_HASH_SIPHASH &&
2740                     fix_problem(ctx, PR_1_HTREE_NEEDS_SIPHASH, pctx))
2741                         return 1;
2742         } else {
2743                 if (root->hash_version == EXT2_HASH_SIPHASH &&
2744                    fix_problem(ctx, PR_1_HTREE_CANNOT_SIPHASH, pctx))
2745                         return 1;
2746         }
2747
2748         if ((root->unused_flags & EXT2_HASH_FLAG_INCOMPAT) &&
2749             fix_problem(ctx, PR_1_HTREE_INCOMPAT, pctx))
2750                 return 1;
2751
2752         pctx->num = root->indirect_levels;
2753         /* if htree level is clearly too high, consider it to be broken */
2754         if (root->indirect_levels > EXT4_HTREE_LEVEL &&
2755             fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2756                 return 1;
2757
2758         /* if level is only maybe too high, LARGE_DIR feature could be unset */
2759         if (root->indirect_levels > ext2_dir_htree_level(fs) &&
2760             !ext2fs_has_feature_largedir(fs->super)) {
2761                 int blockbits = EXT2_BLOCK_SIZE_BITS(fs->super) + 10;
2762                 unsigned idx_pb = 1 << (blockbits - 3);
2763
2764                 /* compare inode size/blocks vs. max-sized 2-level htree */
2765                 if (EXT2_I_SIZE(pctx->inode) <
2766                     (idx_pb - 1) * (idx_pb - 2) << blockbits &&
2767                     pctx->inode->i_blocks <
2768                     (idx_pb - 1) * (idx_pb - 2) << (blockbits - 9) &&
2769                     fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2770                         return 1;
2771         }
2772
2773         if (root->indirect_levels > EXT4_HTREE_LEVEL_COMPAT ||
2774             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
2775                 ctx->large_dirs++;
2776
2777         return 0;
2778 }
2779
2780 void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino,
2781                         struct ext2_inode *inode, int restart_flag,
2782                         const char *source)
2783 {
2784         inode->i_flags = 0;
2785         inode->i_links_count = 0;
2786         ext2fs_icount_store(ctx->inode_link_info, ino, 0);
2787         inode->i_dtime = ctx->now;
2788
2789         /*
2790          * If a special inode has such rotten block mappings that we
2791          * want to clear the whole inode, be sure to actually zap
2792          * the block maps because i_links_count isn't checked for
2793          * special inodes, and we'll end up right back here the next
2794          * time we run fsck.
2795          */
2796         if (ino < EXT2_FIRST_INODE(ctx->fs->super))
2797                 memset(inode->i_block, 0, sizeof(inode->i_block));
2798
2799         ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
2800         ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
2801         if (ctx->inode_reg_map)
2802                 ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
2803         if (ctx->inode_bad_map)
2804                 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
2805
2806         /*
2807          * If the inode was partially accounted for before processing
2808          * was aborted, we need to restart the pass 1 scan.
2809          */
2810         ctx->flags |= restart_flag;
2811
2812         if (ino == EXT2_BAD_INO)
2813                 memset(inode, 0, sizeof(struct ext2_inode));
2814
2815         e2fsck_write_inode(ctx, ino, inode, source);
2816 }
2817
2818 /*
2819  * Use the multiple-blocks reclamation code to fix alignment problems in
2820  * a bigalloc filesystem.  We want a logical cluster to map to *only* one
2821  * physical cluster, and we want the block offsets within that cluster to
2822  * line up.
2823  */
2824 static int has_unaligned_cluster_map(e2fsck_t ctx,
2825                                      blk64_t last_pblk, blk64_t last_lblk,
2826                                      blk64_t pblk, blk64_t lblk)
2827 {
2828         blk64_t cluster_mask;
2829
2830         if (!ctx->fs->cluster_ratio_bits)
2831                 return 0;
2832         cluster_mask = EXT2FS_CLUSTER_MASK(ctx->fs);
2833
2834         /*
2835          * If the block in the logical cluster doesn't align with the block in
2836          * the physical cluster...
2837          */
2838         if ((lblk & cluster_mask) != (pblk & cluster_mask))
2839                 return 1;
2840
2841         /*
2842          * If we cross a physical cluster boundary within a logical cluster...
2843          */
2844         if (last_pblk && (lblk & cluster_mask) != 0 &&
2845             EXT2FS_B2C(ctx->fs, lblk) == EXT2FS_B2C(ctx->fs, last_lblk) &&
2846             EXT2FS_B2C(ctx->fs, pblk) != EXT2FS_B2C(ctx->fs, last_pblk))
2847                 return 1;
2848
2849         return 0;
2850 }
2851
2852 static void scan_extent_node(e2fsck_t ctx, struct problem_context *pctx,
2853                              struct process_block_struct *pb,
2854                              blk64_t start_block, blk64_t end_block,
2855                              blk64_t eof_block,
2856                              ext2_extent_handle_t ehandle,
2857                              int try_repairs)
2858 {
2859         struct ext2fs_extent    extent;
2860         blk64_t                 blk, last_lblk;
2861         unsigned int            i, n;
2862         int                     is_dir, is_leaf;
2863         problem_t               problem;
2864         struct ext2_extent_info info;
2865         int                     failed_csum = 0;
2866
2867         if (pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID)
2868                 failed_csum = 1;
2869
2870         pctx->errcode = ext2fs_extent_get_info(ehandle, &info);
2871         if (pctx->errcode)
2872                 return;
2873         if (!(ctx->options & E2F_OPT_FIXES_ONLY) &&
2874             !pb->eti.force_rebuild &&
2875             info.curr_level < MAX_EXTENT_DEPTH_COUNT) {
2876                 struct extent_tree_level *etl;
2877
2878                 etl = pb->eti.ext_info + info.curr_level;
2879                 etl->num_extents += info.num_entries;
2880                 etl->max_extents += info.max_entries;
2881                 /*
2882                  * Implementation wart: Splitting extent blocks when appending
2883                  * will leave the old block with one free entry.  Therefore
2884                  * unless the node is totally full, pretend that a non-root
2885                  * extent block can hold one fewer entry than it actually does,
2886                  * so that we don't repeatedly rebuild the extent tree.
2887                  */
2888                 if (info.curr_level && info.num_entries < info.max_entries)
2889                         etl->max_extents--;
2890         }
2891
2892         pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_FIRST_SIB,
2893                                           &extent);
2894         while ((pctx->errcode == 0 ||
2895                 pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID) &&
2896                info.num_entries-- > 0) {
2897                 is_leaf = extent.e_flags & EXT2_EXTENT_FLAGS_LEAF;
2898                 is_dir = LINUX_S_ISDIR(pctx->inode->i_mode);
2899                 last_lblk = extent.e_lblk + extent.e_len - 1;
2900
2901                 problem = 0;
2902                 pctx->blk = extent.e_pblk;
2903                 pctx->blk2 = extent.e_lblk;
2904                 pctx->num = extent.e_len;
2905                 pctx->blkcount = extent.e_lblk + extent.e_len;
2906
2907                 if (extent.e_pblk == 0 ||
2908                     extent.e_pblk < ctx->fs->super->s_first_data_block ||
2909                     extent.e_pblk >= ext2fs_blocks_count(ctx->fs->super))
2910                         problem = PR_1_EXTENT_BAD_START_BLK;
2911                 else if (extent.e_lblk < start_block)
2912                         problem = PR_1_OUT_OF_ORDER_EXTENTS;
2913                 else if ((end_block && last_lblk > end_block) &&
2914                          !(last_lblk > eof_block &&
2915                            ((extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) ||
2916                             (pctx->inode->i_flags & EXT4_VERITY_FL))))
2917                         problem = PR_1_EXTENT_END_OUT_OF_BOUNDS;
2918                 else if (is_leaf && extent.e_len == 0)
2919                         problem = PR_1_EXTENT_LENGTH_ZERO;
2920                 else if (is_leaf &&
2921                          (extent.e_pblk + extent.e_len) >
2922                          ext2fs_blocks_count(ctx->fs->super))
2923                         problem = PR_1_EXTENT_ENDS_BEYOND;
2924                 else if (is_leaf && is_dir && !pctx->inode->i_size_high &&
2925                          !ext2fs_has_feature_largedir(ctx->fs->super) &&
2926                          ((extent.e_lblk + extent.e_len) >
2927                           (1U << (21 - ctx->fs->super->s_log_block_size))))
2928                         problem = PR_1_TOOBIG_DIR;
2929
2930                 if (is_leaf && problem == 0 && extent.e_len > 0) {
2931 #if 0
2932                         printf("extent_region(ino=%u, expect=%llu, "
2933                                "lblk=%llu, len=%u)\n", pb->ino,
2934                                (unsigned long long) pb->next_lblock,
2935                                (unsigned long long) extent.e_lblk,
2936                                extent.e_len);
2937 #endif
2938                         if (extent.e_lblk < pb->next_lblock)
2939                                 problem = PR_1_EXTENT_COLLISION;
2940                         else if (extent.e_lblk + extent.e_len > pb->next_lblock)
2941                                 pb->next_lblock = extent.e_lblk + extent.e_len;
2942                 }
2943
2944                 /*
2945                  * Uninitialized blocks in a directory?  Clear the flag and
2946                  * we'll interpret the blocks later.
2947                  */
2948                 if (try_repairs && is_dir && problem == 0 &&
2949                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
2950                     fix_problem(ctx, PR_1_UNINIT_DBLOCK, pctx)) {
2951                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
2952                         pb->inode_modified = 1;
2953                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
2954                                                               &extent);
2955                         if (pctx->errcode)
2956                                 return;
2957                         failed_csum = 0;
2958                 }
2959 #ifdef CONFIG_DEVELOPER_FEATURES
2960                 if (try_repairs && !is_dir && problem == 0 &&
2961                     (ctx->options & E2F_OPT_CLEAR_UNINIT) &&
2962                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
2963                     fix_problem(ctx, PR_1_CLEAR_UNINIT_EXTENT, pctx)) {
2964                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
2965                         pb->inode_modified = 1;
2966                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
2967                                                               &extent);
2968                         if (pctx->errcode)
2969                                 return;
2970                         failed_csum = 0;
2971                 }
2972 #endif
2973                 if (try_repairs && problem) {
2974 report_problem:
2975                         if (fix_problem(ctx, problem, pctx)) {
2976                                 if (ctx->invalid_bitmaps) {
2977                                         /*
2978                                          * If fsck knows the bitmaps are bad,
2979                                          * skip to the next extent and
2980                                          * try to clear this extent again
2981                                          * after fixing the bitmaps, by
2982                                          * restarting fsck.
2983                                          */
2984                                         pctx->errcode = ext2fs_extent_get(
2985                                                           ehandle,
2986                                                           EXT2_EXTENT_NEXT_SIB,
2987                                                           &extent);
2988                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
2989                                         if (pctx->errcode ==
2990                                                     EXT2_ET_NO_CURRENT_NODE) {
2991                                                 pctx->errcode = 0;
2992                                                 break;
2993                                         }
2994                                         continue;
2995                                 }
2996                                 e2fsck_read_bitmaps(ctx);
2997                                 pb->inode_modified = 1;
2998                                 pctx->errcode =
2999                                         ext2fs_extent_delete(ehandle, 0);
3000                                 if (pctx->errcode) {
3001                                         pctx->str = "ext2fs_extent_delete";
3002                                         return;
3003                                 }
3004                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3005                                 if (pctx->errcode &&
3006                                     pctx->errcode != EXT2_ET_NO_CURRENT_NODE) {
3007                                         pctx->str = "ext2fs_extent_fix_parents";
3008                                         return;
3009                                 }
3010                                 pctx->errcode = ext2fs_extent_get(ehandle,
3011                                                                   EXT2_EXTENT_CURRENT,
3012                                                                   &extent);
3013                                 if (pctx->errcode == EXT2_ET_NO_CURRENT_NODE) {
3014                                         pctx->errcode = 0;
3015                                         break;
3016                                 }
3017                                 failed_csum = 0;
3018                                 continue;
3019                         }
3020                         goto next;
3021                 }
3022
3023                 if (!is_leaf) {
3024                         blk64_t lblk = extent.e_lblk;
3025                         int next_try_repairs = 1;
3026
3027                         blk = extent.e_pblk;
3028
3029                         /*
3030                          * If this lower extent block collides with critical
3031                          * metadata, don't try to repair the damage.  Pass 1b
3032                          * will reallocate the block; then we can try again.
3033                          */
3034                         if (pb->ino != EXT2_RESIZE_INO &&
3035                             extent.e_pblk < ctx->fs->super->s_blocks_count &&
3036                             ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3037                                                       extent.e_pblk)) {
3038                                 next_try_repairs = 0;
3039                                 pctx->blk = blk;
3040                                 fix_problem(ctx,
3041                                             PR_1_CRITICAL_METADATA_COLLISION,
3042                                             pctx);
3043                                 if ((ctx->options & E2F_OPT_NO) == 0)
3044                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3045                         }
3046                         pctx->errcode = ext2fs_extent_get(ehandle,
3047                                                   EXT2_EXTENT_DOWN, &extent);
3048                         if (pctx->errcode &&
3049                             pctx->errcode != EXT2_ET_EXTENT_CSUM_INVALID) {
3050                                 pctx->str = "EXT2_EXTENT_DOWN";
3051                                 problem = PR_1_EXTENT_HEADER_INVALID;
3052                                 if (!next_try_repairs)
3053                                         return;
3054                                 if (pctx->errcode == EXT2_ET_EXTENT_HEADER_BAD)
3055                                         goto report_problem;
3056                                 return;
3057                         }
3058                         /* The next extent should match this index's logical start */
3059                         if (extent.e_lblk != lblk) {
3060                                 struct ext2_extent_info e_info;
3061
3062                                 pctx->errcode = ext2fs_extent_get_info(ehandle,
3063                                                                        &e_info);
3064                                 if (pctx->errcode) {
3065                                         pctx->str = "ext2fs_extent_get_info";
3066                                         return;
3067                                 }
3068                                 pctx->blk = lblk;
3069                                 pctx->blk2 = extent.e_lblk;
3070                                 pctx->num = e_info.curr_level - 1;
3071                                 problem = PR_1_EXTENT_INDEX_START_INVALID;
3072                                 if (fix_problem(ctx, problem, pctx)) {
3073                                         pb->inode_modified = 1;
3074                                         pctx->errcode =
3075                                                 ext2fs_extent_fix_parents(ehandle);
3076                                         if (pctx->errcode) {
3077                                                 pctx->str = "ext2fs_extent_fix_parents";
3078                                                 return;
3079                                         }
3080                                 }
3081                         }
3082                         scan_extent_node(ctx, pctx, pb, extent.e_lblk,
3083                                          last_lblk, eof_block, ehandle,
3084                                          next_try_repairs);
3085                         if (pctx->errcode)
3086                                 return;
3087                         pctx->errcode = ext2fs_extent_get(ehandle,
3088                                                   EXT2_EXTENT_UP, &extent);
3089                         if (pctx->errcode) {
3090                                 pctx->str = "EXT2_EXTENT_UP";
3091                                 return;
3092                         }
3093                         mark_block_used(ctx, blk);
3094                         pb->num_blocks++;
3095                         goto next;
3096                 }
3097
3098                 if ((pb->previous_block != 0) &&
3099                     (pb->previous_block+1 != extent.e_pblk)) {
3100                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3101                                 char type = '?';
3102
3103                                 if (pb->is_dir)
3104                                         type = 'd';
3105                                 else if (pb->is_reg)
3106                                         type = 'f';
3107
3108                                 printf(("%6lu(%c): expecting %6lu "
3109                                         "actual extent "
3110                                         "phys %6lu log %lu len %lu\n"),
3111                                        (unsigned long) pctx->ino, type,
3112                                        (unsigned long) pb->previous_block+1,
3113                                        (unsigned long) extent.e_pblk,
3114                                        (unsigned long) extent.e_lblk,
3115                                        (unsigned long) extent.e_len);
3116                         }
3117                         pb->fragmented = 1;
3118                 }
3119                 /*
3120                  * If we notice a gap in the logical block mappings of an
3121                  * extent-mapped directory, offer to close the hole by
3122                  * moving the logical block down, otherwise we'll go mad in
3123                  * pass 3 allocating empty directory blocks to fill the hole.
3124                  */
3125                 if (try_repairs && is_dir &&
3126                     pb->last_block + 1 < extent.e_lblk) {
3127                         blk64_t new_lblk;
3128
3129                         new_lblk = pb->last_block + 1;
3130                         if (EXT2FS_CLUSTER_RATIO(ctx->fs) > 1)
3131                                 new_lblk = ((new_lblk +
3132                                              EXT2FS_CLUSTER_RATIO(ctx->fs) - 1) &
3133                                             ~EXT2FS_CLUSTER_MASK(ctx->fs)) |
3134                                            (extent.e_pblk &
3135                                             EXT2FS_CLUSTER_MASK(ctx->fs));
3136                         pctx->blk = extent.e_lblk;
3137                         pctx->blk2 = new_lblk;
3138                         if (fix_problem(ctx, PR_1_COLLAPSE_DBLOCK, pctx)) {
3139                                 extent.e_lblk = new_lblk;
3140                                 pb->inode_modified = 1;
3141                                 pctx->errcode = ext2fs_extent_replace(ehandle,
3142                                                                 0, &extent);
3143                                 if (pctx->errcode) {
3144                                         pctx->errcode = 0;
3145                                         goto alloc_later;
3146                                 }
3147                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3148                                 if (pctx->errcode)
3149                                         goto failed_add_dir_block;
3150                                 pctx->errcode = ext2fs_extent_goto(ehandle,
3151                                                                 extent.e_lblk);
3152                                 if (pctx->errcode)
3153                                         goto failed_add_dir_block;
3154                                 last_lblk = extent.e_lblk + extent.e_len - 1;
3155                                 failed_csum = 0;
3156                         }
3157                 }
3158 alloc_later:
3159                 if (is_dir) {
3160                         while (++pb->last_db_block <
3161                                (e2_blkcnt_t) extent.e_lblk) {
3162                                 pctx->errcode = ext2fs_add_dir_block2(
3163                                                         ctx->fs->dblist,
3164                                                         pb->ino, 0,
3165                                                         pb->last_db_block);
3166                                 if (pctx->errcode) {
3167                                         pctx->blk = 0;
3168                                         pctx->num = pb->last_db_block;
3169                                         goto failed_add_dir_block;
3170                                 }
3171                         }
3172
3173                         for (i = 0; i < extent.e_len; i++) {
3174                                 pctx->errcode = ext2fs_add_dir_block2(
3175                                                         ctx->fs->dblist,
3176                                                         pctx->ino,
3177                                                         extent.e_pblk + i,
3178                                                         extent.e_lblk + i);
3179                                 if (pctx->errcode) {
3180                                         pctx->blk = extent.e_pblk + i;
3181                                         pctx->num = extent.e_lblk + i;
3182                                 failed_add_dir_block:
3183                                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3184                                         /* Should never get here */
3185                                         ctx->flags |= E2F_FLAG_ABORT;
3186                                         return;
3187                                 }
3188                         }
3189                         if (extent.e_len > 0)
3190                                 pb->last_db_block = extent.e_lblk + extent.e_len - 1;
3191                 }
3192                 if (has_unaligned_cluster_map(ctx, pb->previous_block,
3193                                               pb->last_block,
3194                                               extent.e_pblk,
3195                                               extent.e_lblk)) {
3196                         for (i = 0; i < extent.e_len; i++) {
3197                                 pctx->blk = extent.e_lblk + i;
3198                                 pctx->blk2 = extent.e_pblk + i;
3199                                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3200                                 mark_block_used(ctx, extent.e_pblk + i);
3201                                 mark_block_used(ctx, extent.e_pblk + i);
3202                         }
3203                 }
3204
3205                 /*
3206                  * Check whether first cluster got marked in previous iteration.
3207                  */
3208                 if (ctx->fs->cluster_ratio_bits &&
3209                     pb->previous_block &&
3210                     (EXT2FS_B2C(ctx->fs, extent.e_pblk) ==
3211                      EXT2FS_B2C(ctx->fs, pb->previous_block)))
3212                         /* Set blk to the beginning of next cluster. */
3213                         blk = EXT2FS_C2B(
3214                                 ctx->fs,
3215                                 EXT2FS_B2C(ctx->fs, extent.e_pblk) + 1);
3216                 else
3217                         /* Set blk to the beginning of current cluster. */
3218                         blk = EXT2FS_C2B(ctx->fs,
3219                                          EXT2FS_B2C(ctx->fs, extent.e_pblk));
3220
3221                 if (blk < extent.e_pblk + extent.e_len) {
3222                         mark_blocks_used(ctx, blk,
3223                                          extent.e_pblk + extent.e_len - blk);
3224                         n = DIV_ROUND_UP(extent.e_pblk + extent.e_len - blk,
3225                                          EXT2FS_CLUSTER_RATIO(ctx->fs));
3226                         pb->num_blocks += n;
3227                 }
3228                 pb->last_block = extent.e_lblk + extent.e_len - 1;
3229                 pb->previous_block = extent.e_pblk + extent.e_len - 1;
3230                 start_block = pb->last_block = last_lblk;
3231                 if (is_leaf && !is_dir &&
3232                     !(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT))
3233                         pb->last_init_lblock = last_lblk;
3234         next:
3235                 pctx->errcode = ext2fs_extent_get(ehandle,
3236                                                   EXT2_EXTENT_NEXT_SIB,
3237                                                   &extent);
3238         }
3239
3240         /* Failed csum but passes checks?  Ask to fix checksum. */
3241         if (failed_csum &&
3242             fix_problem(ctx, PR_1_EXTENT_ONLY_CSUM_INVALID, pctx)) {
3243                 pb->inode_modified = 1;
3244                 pctx->errcode = ext2fs_extent_replace(ehandle, 0, &extent);
3245                 if (pctx->errcode)
3246                         return;
3247         }
3248
3249         if (pctx->errcode == EXT2_ET_EXTENT_NO_NEXT)
3250                 pctx->errcode = 0;
3251 }
3252
3253 static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx,
3254                                  struct process_block_struct *pb)
3255 {
3256         struct ext2_extent_info info;
3257         struct ext2_inode       *inode = pctx->inode;
3258         ext2_extent_handle_t    ehandle;
3259         ext2_filsys             fs = ctx->fs;
3260         ext2_ino_t              ino = pctx->ino;
3261         errcode_t               retval;
3262         blk64_t                 eof_lblk;
3263         struct ext3_extent_header       *eh;
3264
3265         /* Check for a proper extent header... */
3266         eh = (struct ext3_extent_header *) &inode->i_block[0];
3267         retval = ext2fs_extent_header_verify(eh, sizeof(inode->i_block));
3268         if (retval) {
3269                 if (fix_problem(ctx, PR_1_MISSING_EXTENT_HEADER, pctx))
3270                         e2fsck_clear_inode(ctx, ino, inode, 0,
3271                                            "check_blocks_extents");
3272                 pctx->errcode = 0;
3273                 return;
3274         }
3275
3276         /* ...since this function doesn't fail if i_block is zeroed. */
3277         pctx->errcode = ext2fs_extent_open2(fs, ino, inode, &ehandle);
3278         if (pctx->errcode) {
3279                 if (fix_problem(ctx, PR_1_READ_EXTENT, pctx))
3280                         e2fsck_clear_inode(ctx, ino, inode, 0,
3281                                            "check_blocks_extents");
3282                 pctx->errcode = 0;
3283                 return;
3284         }
3285
3286         retval = ext2fs_extent_get_info(ehandle, &info);
3287         if (retval == 0) {
3288                 int max_depth = info.max_depth;
3289
3290                 if (max_depth >= MAX_EXTENT_DEPTH_COUNT)
3291                         max_depth = MAX_EXTENT_DEPTH_COUNT-1;
3292                 ctx->extent_depth_count[max_depth]++;
3293         }
3294
3295         /* Check maximum extent depth */
3296         pctx->blk = info.max_depth;
3297         pctx->blk2 = ext2fs_max_extent_depth(ehandle);
3298         if (pctx->blk2 < pctx->blk &&
3299             fix_problem(ctx, PR_1_EXTENT_BAD_MAX_DEPTH, pctx))
3300                 pb->eti.force_rebuild = 1;
3301
3302         /* Can we collect extent tree level stats? */
3303         pctx->blk = MAX_EXTENT_DEPTH_COUNT;
3304         if (pctx->blk2 > pctx->blk)
3305                 fix_problem(ctx, PR_1E_MAX_EXTENT_TREE_DEPTH, pctx);
3306         memset(pb->eti.ext_info, 0, sizeof(pb->eti.ext_info));
3307         pb->eti.ino = pb->ino;
3308
3309         pb->next_lblock = 0;
3310
3311         eof_lblk = ((EXT2_I_SIZE(inode) + fs->blocksize - 1) >>
3312                 EXT2_BLOCK_SIZE_BITS(fs->super)) - 1;
3313         scan_extent_node(ctx, pctx, pb, 0, 0, eof_lblk, ehandle, 1);
3314         if (pctx->errcode &&
3315             fix_problem(ctx, PR_1_EXTENT_ITERATE_FAILURE, pctx)) {
3316                 pb->num_blocks = 0;
3317                 inode->i_blocks = 0;
3318                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3319                                    "check_blocks_extents");
3320                 pctx->errcode = 0;
3321         }
3322         ext2fs_extent_free(ehandle);
3323
3324         /* Rebuild unless it's a dir and we're rehashing it */
3325         if (LINUX_S_ISDIR(inode->i_mode) &&
3326             e2fsck_dir_will_be_rehashed(ctx, ino))
3327                 return;
3328
3329         if (ctx->options & E2F_OPT_CONVERT_BMAP)
3330                 e2fsck_rebuild_extents_later(ctx, ino);
3331         else
3332                 e2fsck_should_rebuild_extents(ctx, pctx, &pb->eti, &info);
3333 }
3334
3335 /*
3336  * In fact we don't need to check blocks for an inode with inline data
3337  * because this inode doesn't have any blocks.  In this function all
3338  * we need to do is add this inode into dblist when it is a directory.
3339  */
3340 static void check_blocks_inline_data(e2fsck_t ctx, struct problem_context *pctx,
3341                                      struct process_block_struct *pb)
3342 {
3343         int     flags;
3344         size_t  inline_data_size = 0;
3345
3346         if (!pb->is_dir) {
3347                 pctx->errcode = 0;
3348                 return;
3349         }
3350
3351         /* Process the dirents in i_block[] as the "first" block. */
3352         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 0);
3353         if (pctx->errcode)
3354                 goto err;
3355
3356         /* Process the dirents in the EA as a "second" block. */
3357         flags = ctx->fs->flags;
3358         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3359         pctx->errcode = ext2fs_inline_data_size(ctx->fs, pb->ino,
3360                                                 &inline_data_size);
3361         ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3362                          (ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3363         if (pctx->errcode) {
3364                 pctx->errcode = 0;
3365                 return;
3366         }
3367
3368         if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE)
3369                 return;
3370
3371         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 1);
3372         if (pctx->errcode)
3373                 goto err;
3374
3375         return;
3376 err:
3377         pctx->blk = 0;
3378         pctx->num = 0;
3379         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3380         ctx->flags |= E2F_FLAG_ABORT;
3381 }
3382
3383 /*
3384  * This subroutine is called on each inode to account for all of the
3385  * blocks used by that inode.
3386  */
3387 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
3388                          char *block_buf, const struct ea_quota *ea_ibody_quota)
3389 {
3390         ext2_filsys fs = ctx->fs;
3391         struct process_block_struct pb;
3392         ext2_ino_t      ino = pctx->ino;
3393         struct ext2_inode *inode = pctx->inode;
3394         unsigned        bad_size = 0;
3395         int             dirty_inode = 0;
3396         int             extent_fs;
3397         int             inlinedata_fs;
3398         __u64           size;
3399         struct ea_quota ea_block_quota;
3400
3401         pb.ino = ino;
3402         pb.num_blocks = EXT2FS_B2C(ctx->fs,
3403                                    ea_ibody_quota ? ea_ibody_quota->blocks : 0);
3404         pb.last_block = ~0;
3405         pb.last_init_lblock = -1;
3406         pb.last_db_block = -1;
3407         pb.num_illegal_blocks = 0;
3408         pb.suppress = 0; pb.clear = 0;
3409         pb.fragmented = 0;
3410         pb.compressed = 0;
3411         pb.previous_block = 0;
3412         pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
3413         pb.is_reg = LINUX_S_ISREG(inode->i_mode);
3414         pb.max_blocks = 1U << (31 - fs->super->s_log_block_size);
3415         pb.inode = inode;
3416         pb.pctx = pctx;
3417         pb.ctx = ctx;
3418         pb.inode_modified = 0;
3419         pb.eti.force_rebuild = 0;
3420         pctx->ino = ino;
3421         pctx->errcode = 0;
3422
3423         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
3424         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
3425
3426         if (check_ext_attr(ctx, pctx, block_buf, &ea_block_quota)) {
3427                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3428                         goto out;
3429                 pb.num_blocks += EXT2FS_B2C(ctx->fs, ea_block_quota.blocks);
3430         }
3431
3432         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL))
3433                 check_blocks_inline_data(ctx, pctx, &pb);
3434         else if (ext2fs_inode_has_valid_blocks2(fs, inode)) {
3435                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL))
3436                         check_blocks_extents(ctx, pctx, &pb);
3437                 else {
3438                         int flags;
3439                         /*
3440                          * If we've modified the inode, write it out before
3441                          * iterate() tries to use it.
3442                          */
3443                         if (dirty_inode) {
3444                                 e2fsck_write_inode(ctx, ino, inode,
3445                                                    "check_blocks");
3446                                 dirty_inode = 0;
3447                         }
3448                         flags = fs->flags;
3449                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3450                         pctx->errcode = ext2fs_block_iterate3(fs, ino,
3451                                                 pb.is_dir ? BLOCK_FLAG_HOLE : 0,
3452                                                 block_buf, process_block, &pb);
3453                         /*
3454                          * We do not have uninitialized extents in non extent
3455                          * files.
3456                          */
3457                         pb.last_init_lblock = pb.last_block;
3458                         /*
3459                          * If iterate() changed a block mapping, we have to
3460                          * re-read the inode.  If we decide to clear the
3461                          * inode after clearing some stuff, we'll re-write the
3462                          * bad mappings into the inode!
3463                          */
3464                         if (pb.inode_modified)
3465                                 e2fsck_read_inode(ctx, ino, inode,
3466                                                   "check_blocks");
3467                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3468                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3469
3470                         if (ctx->options & E2F_OPT_CONVERT_BMAP) {
3471 #ifdef DEBUG
3472                                 printf("bmap rebuild ino=%d\n", ino);
3473 #endif
3474                                 if (!LINUX_S_ISDIR(inode->i_mode) ||
3475                                     !e2fsck_dir_will_be_rehashed(ctx, ino))
3476                                         e2fsck_rebuild_extents_later(ctx, ino);
3477                         }
3478                 }
3479         }
3480         end_problem_latch(ctx, PR_LATCH_BLOCK);
3481         end_problem_latch(ctx, PR_LATCH_TOOBIG);
3482         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3483                 goto out;
3484         if (pctx->errcode)
3485                 fix_problem(ctx, PR_1_BLOCK_ITERATE, pctx);
3486
3487         if (pb.fragmented && pb.num_blocks < fs->super->s_blocks_per_group) {
3488                 if (LINUX_S_ISDIR(inode->i_mode))
3489                         ctx->fs_fragmented_dir++;
3490                 else
3491                         ctx->fs_fragmented++;
3492         }
3493
3494         if (pb.clear) {
3495                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3496                                    "check_blocks");
3497                 return;
3498         }
3499
3500         if (inode->i_flags & EXT2_INDEX_FL) {
3501                 if (handle_htree(ctx, pctx, ino, inode, block_buf)) {
3502                         inode->i_flags &= ~EXT2_INDEX_FL;
3503                         dirty_inode++;
3504                 } else {
3505                         e2fsck_add_dx_dir(ctx, ino, inode, pb.last_block+1);
3506                 }
3507         }
3508
3509         if (!pb.num_blocks && pb.is_dir &&
3510             !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
3511                 if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) {
3512                         e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks");
3513                         ctx->fs_directory_count--;
3514                         return;
3515                 }
3516         }
3517
3518         if (ino != quota_type2inum(PRJQUOTA, fs->super) &&
3519             ino != fs->super->s_orphan_file_inum &&
3520             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super)) &&
3521             !(inode->i_flags & EXT4_EA_INODE_FL)) {
3522                 quota_data_add(ctx->qctx, (struct ext2_inode_large *) inode,
3523                                ino,
3524                                pb.num_blocks * EXT2_CLUSTER_SIZE(fs->super));
3525                 quota_data_inodes(ctx->qctx, (struct ext2_inode_large *) inode,
3526                                   ino, (ea_ibody_quota ?
3527                                         ea_ibody_quota->inodes : 0) +
3528                                                 ea_block_quota.inodes + 1);
3529         }
3530
3531         if (!ext2fs_has_feature_huge_file(fs->super) ||
3532             !(inode->i_flags & EXT4_HUGE_FILE_FL))
3533                 pb.num_blocks *= (fs->blocksize / 512);
3534         pb.num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
3535 #if 0
3536         printf("inode %u, i_size = %u, last_block = %llu, i_blocks=%llu, num_blocks = %llu\n",
3537                ino, inode->i_size, (unsigned long long) pb.last_block,
3538                (unsigned long long) ext2fs_inode_i_blocks(fs, inode),
3539                (unsigned long long) pb.num_blocks);
3540 #endif
3541         size = EXT2_I_SIZE(inode);
3542         if (pb.is_dir) {
3543                 unsigned nblock = size >> EXT2_BLOCK_SIZE_BITS(fs->super);
3544                 if (inode->i_flags & EXT4_INLINE_DATA_FL) {
3545                         int flags;
3546                         size_t sz = 0;
3547                         errcode_t err;
3548
3549                         flags = ctx->fs->flags;
3550                         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3551                         err = ext2fs_inline_data_size(ctx->fs, pctx->ino,
3552                                                       &sz);
3553                         ctx->fs->flags = (flags &
3554                                           EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3555                                          (ctx->fs->flags &
3556                                           ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3557                         if (err || sz != size) {
3558                                 bad_size = 7;
3559                                 pctx->num = sz;
3560                         }
3561                 } else if (size & (fs->blocksize - 1))
3562                         bad_size = 5;
3563                 else if (nblock > (pb.last_block + 1))
3564                         bad_size = 1;
3565                 else if (nblock < (pb.last_block + 1)) {
3566                         if (((pb.last_block + 1) - nblock) >
3567                             fs->super->s_prealloc_dir_blocks)
3568                                 bad_size = 2;
3569                 }
3570         } else {
3571                 if ((pb.last_init_lblock >= 0) &&
3572                     /* Do not allow initialized allocated blocks past i_size*/
3573                     (size < (__u64)pb.last_init_lblock * fs->blocksize) &&
3574                     !(inode->i_flags & EXT4_VERITY_FL))
3575                         bad_size = 3;
3576                 else if (!(extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3577                          size > ext2_max_sizes[fs->super->s_log_block_size])
3578                         /* too big for a direct/indirect-mapped file */
3579                         bad_size = 4;
3580                 else if ((extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3581                          size >
3582                          ((1ULL << (32 + EXT2_BLOCK_SIZE_BITS(fs->super))) - 1))
3583                         /* too big for an extent-based file - 32bit ee_block */
3584                         bad_size = 6;
3585         }
3586         /* i_size for symlinks is checked elsewhere */
3587         if (bad_size && !LINUX_S_ISLNK(inode->i_mode)) {
3588                 /* Did inline_data set pctx->num earlier? */
3589                 if (bad_size != 7)
3590                         pctx->num = (pb.last_block + 1) * fs->blocksize;
3591                 pctx->group = bad_size;
3592                 if (fix_problem(ctx, PR_1_BAD_I_SIZE, pctx)) {
3593                         ext2fs_inode_size_set(fs, inode, pctx->num);
3594                         if (EXT2_I_SIZE(inode) == 0 &&
3595                             (inode->i_flags & EXT4_INLINE_DATA_FL)) {
3596                                 memset(inode->i_block, 0,
3597                                        sizeof(inode->i_block));
3598                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
3599                         }
3600                         dirty_inode++;
3601                 }
3602                 pctx->num = 0;
3603         }
3604         if (LINUX_S_ISREG(inode->i_mode) &&
3605             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
3606                 ctx->large_files++;
3607         if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
3608             ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) ||
3609              (ext2fs_has_feature_huge_file(fs->super) &&
3610               (inode->i_flags & EXT4_HUGE_FILE_FL) &&
3611               (inode->osd2.linux2.l_i_blocks_hi != 0)))) {
3612                 pctx->num = pb.num_blocks;
3613                 if (fix_problem(ctx, PR_1_BAD_I_BLOCKS, pctx)) {
3614                         inode->i_blocks = pb.num_blocks;
3615                         inode->osd2.linux2.l_i_blocks_hi = pb.num_blocks >> 32;
3616                         dirty_inode++;
3617                 }
3618                 pctx->num = 0;
3619         }
3620
3621         /*
3622          * The kernel gets mad if we ask it to allocate bigalloc clusters to
3623          * a block mapped file, so rebuild it as an extent file.  We can skip
3624          * symlinks because they're never rewritten.
3625          */
3626         if (ext2fs_has_feature_bigalloc(fs->super) &&
3627             (LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode)) &&
3628             ext2fs_inode_data_blocks2(fs, inode) > 0 &&
3629             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INO(fs->super)) &&
3630             !(inode->i_flags & (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)) &&
3631             fix_problem(ctx, PR_1_NO_BIGALLOC_BLOCKMAP_FILES, pctx)) {
3632                 pctx->errcode = e2fsck_rebuild_extents_later(ctx, ino);
3633                 if (pctx->errcode)
3634                         goto out;
3635         }
3636
3637         if (ctx->dirs_to_hash && pb.is_dir &&
3638             !(ctx->lost_and_found && ctx->lost_and_found == ino) &&
3639             !(inode->i_flags & EXT2_INDEX_FL) &&
3640             ((inode->i_size / fs->blocksize) >= 3))
3641                 e2fsck_rehash_dir_later(ctx, ino);
3642
3643 out:
3644         if (dirty_inode)
3645                 e2fsck_write_inode(ctx, ino, inode, "check_blocks");
3646 }
3647
3648 #if 0
3649 /*
3650  * Helper function called by process block when an illegal block is
3651  * found.  It returns a description about why the block is illegal
3652  */
3653 static char *describe_illegal_block(ext2_filsys fs, blk64_t block)
3654 {
3655         blk64_t super;
3656         int     i;
3657         static char     problem[80];
3658
3659         super = fs->super->s_first_data_block;
3660         strcpy(problem, "PROGRAMMING ERROR: Unknown reason for illegal block");
3661         if (block < super) {
3662                 sprintf(problem, "< FIRSTBLOCK (%u)", super);
3663                 return(problem);
3664         } else if (block >= ext2fs_blocks_count(fs->super)) {
3665                 sprintf(problem, "> BLOCKS (%u)", ext2fs_blocks_count(fs->super));
3666                 return(problem);
3667         }
3668         for (i = 0; i < fs->group_desc_count; i++) {
3669                 if (block == super) {
3670                         sprintf(problem, "is the superblock in group %d", i);
3671                         break;
3672                 }
3673                 if (block > super &&
3674                     block <= (super + fs->desc_blocks)) {
3675                         sprintf(problem, "is in the group descriptors "
3676                                 "of group %d", i);
3677                         break;
3678                 }
3679                 if (block == ext2fs_block_bitmap_loc(fs, i)) {
3680                         sprintf(problem, "is the block bitmap of group %d", i);
3681                         break;
3682                 }
3683                 if (block == ext2fs_inode_bitmap_loc(fs, i)) {
3684                         sprintf(problem, "is the inode bitmap of group %d", i);
3685                         break;
3686                 }
3687                 if (block >= ext2fs_inode_table_loc(fs, i) &&
3688                     (block < ext2fs_inode_table_loc(fs, i)
3689                      + fs->inode_blocks_per_group)) {
3690                         sprintf(problem, "is in the inode table of group %d",
3691                                 i);
3692                         break;
3693                 }
3694                 super += fs->super->s_blocks_per_group;
3695         }
3696         return(problem);
3697 }
3698 #endif
3699
3700 /*
3701  * This is a helper function for check_blocks().
3702  */
3703 static int process_block(ext2_filsys fs,
3704                   blk64_t       *block_nr,
3705                   e2_blkcnt_t blockcnt,
3706                   blk64_t ref_block EXT2FS_ATTR((unused)),
3707                   int ref_offset EXT2FS_ATTR((unused)),
3708                   void *priv_data)
3709 {
3710         struct process_block_struct *p;
3711         struct problem_context *pctx;
3712         blk64_t blk = *block_nr;
3713         int     ret_code = 0;
3714         problem_t       problem = 0;
3715         e2fsck_t        ctx;
3716
3717         p = (struct process_block_struct *) priv_data;
3718         pctx = p->pctx;
3719         ctx = p->ctx;
3720
3721         /*
3722          * For a directory, add logical block zero for processing even if it's
3723          * not mapped or we'll be perennially stuck with broken "." and ".."
3724          * entries.
3725          */
3726         if (p->is_dir && blockcnt == 0 && blk == 0) {
3727                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino, 0, 0);
3728                 if (pctx->errcode) {
3729                         pctx->blk = blk;
3730                         pctx->num = blockcnt;
3731                         goto failed_add_dir_block;
3732                 }
3733                 p->last_db_block++;
3734         }
3735
3736         if (blk == 0)
3737                 return 0;
3738
3739 #if 0
3740         printf("Process_block, inode %lu, block %u, #%d\n", p->ino, blk,
3741                blockcnt);
3742 #endif
3743
3744         /*
3745          * Simplistic fragmentation check.  We merely require that the
3746          * file be contiguous.  (Which can never be true for really
3747          * big files that are greater than a block group.)
3748          */
3749         if (p->previous_block && p->ino != EXT2_RESIZE_INO) {
3750                 if (p->previous_block+1 != blk) {
3751                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3752                                 char type = '?';
3753
3754                                 if (p->is_dir)
3755                                         type = 'd';
3756                                 else if (p->is_reg)
3757                                         type = 'f';
3758
3759                                 printf(_("%6lu(%c): expecting %6lu "
3760                                          "got phys %6lu (blkcnt %lld)\n"),
3761                                        (unsigned long) pctx->ino, type,
3762                                        (unsigned long) p->previous_block+1,
3763                                        (unsigned long) blk,
3764                                        (long long) blockcnt);
3765                         }
3766                         p->fragmented = 1;
3767                 }
3768         }
3769
3770         if (p->is_dir && !ext2fs_has_feature_largedir(fs->super) &&
3771             !pctx->inode->i_size_high &&
3772             blockcnt > (1 << (21 - fs->super->s_log_block_size)))
3773                 problem = PR_1_TOOBIG_DIR;
3774         if (p->is_dir && p->num_blocks + 1 >= p->max_blocks)
3775                 problem = PR_1_TOOBIG_DIR;
3776         if (p->is_reg && p->num_blocks + 1 >= p->max_blocks)
3777                 problem = PR_1_TOOBIG_REG;
3778         if (!p->is_dir && !p->is_reg && blockcnt > 0)
3779                 problem = PR_1_TOOBIG_SYMLINK;
3780
3781         if (blk < fs->super->s_first_data_block ||
3782             blk >= ext2fs_blocks_count(fs->super))
3783                 problem = PR_1_ILLEGAL_BLOCK_NUM;
3784
3785         /*
3786          * If this IND/DIND/TIND block is squatting atop some critical metadata
3787          * (group descriptors, superblock, bitmap, inode table), any write to
3788          * "fix" mapping problems will destroy the metadata.  We'll let pass 1b
3789          * fix that and restart fsck.
3790          */
3791         if (blockcnt < 0 &&
3792             p->ino != EXT2_RESIZE_INO &&
3793             blk < ctx->fs->super->s_blocks_count &&
3794             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk)) {
3795                 pctx->blk = blk;
3796                 fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx);
3797                 if ((ctx->options & E2F_OPT_NO) == 0)
3798                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3799         }
3800
3801         if (problem) {
3802                 p->num_illegal_blocks++;
3803                 /*
3804                  * A bit of subterfuge here -- we're trying to fix a block
3805                  * mapping, but the IND/DIND/TIND block could have collided
3806                  * with some critical metadata.  So, fix the in-core mapping so
3807                  * iterate won't go insane, but return 0 instead of
3808                  * BLOCK_CHANGED so that it won't write the remapping out to
3809                  * our multiply linked block.
3810                  *
3811                  * Even if we previously determined that an *IND block
3812                  * conflicts with critical metadata, we must still try to
3813                  * iterate the *IND block as if it is an *IND block to find and
3814                  * mark the blocks it points to.  Better to be overly cautious
3815                  * with the used_blocks map so that we don't move the *IND
3816                  * block to a block that's really in use!
3817                  */
3818                 if (p->ino != EXT2_RESIZE_INO &&
3819                     ref_block != 0 &&
3820                     ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3821                                               ref_block)) {
3822                         *block_nr = 0;
3823                         return 0;
3824                 }
3825                 if (!p->suppress && (p->num_illegal_blocks % 12) == 0) {
3826                         if (fix_problem(ctx, PR_1_TOO_MANY_BAD_BLOCKS, pctx)) {
3827                                 p->clear = 1;
3828                                 return BLOCK_ABORT;
3829                         }
3830                         if (fix_problem(ctx, PR_1_SUPPRESS_MESSAGES, pctx)) {
3831                                 p->suppress = 1;
3832                                 set_latch_flags(PR_LATCH_BLOCK,
3833                                                 PRL_SUPPRESS, 0);
3834                         }
3835                 }
3836                 pctx->blk = blk;
3837                 pctx->blkcount = blockcnt;
3838                 if (fix_problem(ctx, problem, pctx)) {
3839                         blk = *block_nr = 0;
3840                         ret_code = BLOCK_CHANGED;
3841                         p->inode_modified = 1;
3842                         /*
3843                          * If the directory block is too big and is beyond the
3844                          * end of the FS, don't bother trying to add it for
3845                          * processing -- the kernel would never have created a
3846                          * directory this large, and we risk an ENOMEM abort.
3847                          * In any case, the toobig handler for extent-based
3848                          * directories also doesn't feed toobig blocks to
3849                          * pass 2.
3850                          */
3851                         if (problem == PR_1_TOOBIG_DIR)
3852                                 return ret_code;
3853                         goto mark_dir;
3854                 } else
3855                         return 0;
3856         }
3857
3858         if (p->ino == EXT2_RESIZE_INO) {
3859                 /*
3860                  * The resize inode has already be sanity checked
3861                  * during pass #0 (the superblock checks).  All we
3862                  * have to do is mark the double indirect block as
3863                  * being in use; all of the other blocks are handled
3864                  * by mark_table_blocks()).
3865                  */
3866                 if (blockcnt == BLOCK_COUNT_DIND)
3867                         mark_block_used(ctx, blk);
3868                 p->num_blocks++;
3869         } else if (!(ctx->fs->cluster_ratio_bits &&
3870                      p->previous_block &&
3871                      (EXT2FS_B2C(ctx->fs, blk) ==
3872                       EXT2FS_B2C(ctx->fs, p->previous_block)) &&
3873                      (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
3874                      ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
3875                 mark_block_used(ctx, blk);
3876                 p->num_blocks++;
3877         } else if (has_unaligned_cluster_map(ctx, p->previous_block,
3878                                              p->last_block, blk, blockcnt)) {
3879                 pctx->blk = blockcnt;
3880                 pctx->blk2 = blk;
3881                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3882                 mark_block_used(ctx, blk);
3883                 mark_block_used(ctx, blk);
3884         }
3885         if (blockcnt >= 0)
3886                 p->last_block = blockcnt;
3887         p->previous_block = blk;
3888 mark_dir:
3889         if (p->is_dir && (blockcnt >= 0)) {
3890                 while (++p->last_db_block < blockcnt) {
3891                         pctx->errcode = ext2fs_add_dir_block2(fs->dblist,
3892                                                               p->ino, 0,
3893                                                               p->last_db_block);
3894                         if (pctx->errcode) {
3895                                 pctx->blk = 0;
3896                                 pctx->num = p->last_db_block;
3897                                 goto failed_add_dir_block;
3898                         }
3899                 }
3900                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino,
3901                                                       blk, blockcnt);
3902                 if (pctx->errcode) {
3903                         pctx->blk = blk;
3904                         pctx->num = blockcnt;
3905                 failed_add_dir_block:
3906                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3907                         /* Should never get here */
3908                         ctx->flags |= E2F_FLAG_ABORT;
3909                         return BLOCK_ABORT;
3910                 }
3911         }
3912         return ret_code;
3913 }
3914
3915 static int process_bad_block(ext2_filsys fs,
3916                       blk64_t *block_nr,
3917                       e2_blkcnt_t blockcnt,
3918                       blk64_t ref_block EXT2FS_ATTR((unused)),
3919                       int ref_offset EXT2FS_ATTR((unused)),
3920                       void *priv_data)
3921 {
3922         struct process_block_struct *p;
3923         blk64_t         blk = *block_nr;
3924         blk64_t         first_block;
3925         dgrp_t          i;
3926         struct problem_context *pctx;
3927         e2fsck_t        ctx;
3928
3929         if (!blk)
3930                 return 0;
3931
3932         p = (struct process_block_struct *) priv_data;
3933         ctx = p->ctx;
3934         pctx = p->pctx;
3935
3936         pctx->ino = EXT2_BAD_INO;
3937         pctx->blk = blk;
3938         pctx->blkcount = blockcnt;
3939
3940         if ((blk < fs->super->s_first_data_block) ||
3941             (blk >= ext2fs_blocks_count(fs->super))) {
3942                 if (fix_problem(ctx, PR_1_BB_ILLEGAL_BLOCK_NUM, pctx)) {
3943                         *block_nr = 0;
3944                         return BLOCK_CHANGED;
3945                 } else
3946                         return 0;
3947         }
3948
3949         if (blockcnt < 0) {
3950                 if (ext2fs_test_block_bitmap2(p->fs_meta_blocks, blk)) {
3951                         p->bbcheck = 1;
3952                         if (fix_problem(ctx, PR_1_BB_FS_BLOCK, pctx)) {
3953                                 *block_nr = 0;
3954                                 return BLOCK_CHANGED;
3955                         }
3956                 } else if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3957                                                     blk)) {
3958                         p->bbcheck = 1;
3959                         if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK,
3960                                         pctx)) {
3961                                 *block_nr = 0;
3962                                 return BLOCK_CHANGED;
3963                         }
3964                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3965                                 return BLOCK_ABORT;
3966                 } else
3967                         mark_block_used(ctx, blk);
3968                 return 0;
3969         }
3970 #if 0
3971         printf ("DEBUG: Marking %u as bad.\n", blk);
3972 #endif
3973         ctx->fs_badblocks_count++;
3974         /*
3975          * If the block is not used, then mark it as used and return.
3976          * If it is already marked as found, this must mean that
3977          * there's an overlap between the filesystem table blocks
3978          * (bitmaps and inode table) and the bad block list.
3979          */
3980         if (!ext2fs_test_block_bitmap2(ctx->block_found_map, blk)) {
3981                 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
3982                 return 0;
3983         }
3984         /*
3985          * Try to find the where the filesystem block was used...
3986          */
3987         first_block = fs->super->s_first_data_block;
3988
3989         for (i = 0; i < fs->group_desc_count; i++ ) {
3990                 pctx->group = i;
3991                 pctx->blk = blk;
3992                 if (!ext2fs_bg_has_super(fs, i))
3993                         goto skip_super;
3994                 if (blk == first_block) {
3995                         if (i == 0) {
3996                                 if (fix_problem(ctx,
3997                                                 PR_1_BAD_PRIMARY_SUPERBLOCK,
3998                                                 pctx)) {
3999                                         *block_nr = 0;
4000                                         return BLOCK_CHANGED;
4001                                 }
4002                                 return 0;
4003                         }
4004                         fix_problem(ctx, PR_1_BAD_SUPERBLOCK, pctx);
4005                         return 0;
4006                 }
4007                 if ((blk > first_block) &&
4008                     (blk <= first_block + fs->desc_blocks)) {
4009                         if (i == 0) {
4010                                 pctx->blk = *block_nr;
4011                                 if (fix_problem(ctx,
4012                         PR_1_BAD_PRIMARY_GROUP_DESCRIPTOR, pctx)) {
4013                                         *block_nr = 0;
4014                                         return BLOCK_CHANGED;
4015                                 }
4016                                 return 0;
4017                         }
4018                         fix_problem(ctx, PR_1_BAD_GROUP_DESCRIPTORS, pctx);
4019                         return 0;
4020                 }
4021         skip_super:
4022                 if (blk == ext2fs_block_bitmap_loc(fs, i)) {
4023                         if (fix_problem(ctx, PR_1_BB_BAD_BLOCK, pctx)) {
4024                                 ctx->invalid_block_bitmap_flag[i]++;
4025                                 ctx->invalid_bitmaps++;
4026                         }
4027                         return 0;
4028                 }
4029                 if (blk == ext2fs_inode_bitmap_loc(fs, i)) {
4030                         if (fix_problem(ctx, PR_1_IB_BAD_BLOCK, pctx)) {
4031                                 ctx->invalid_inode_bitmap_flag[i]++;
4032                                 ctx->invalid_bitmaps++;
4033                         }
4034                         return 0;
4035                 }
4036                 if ((blk >= ext2fs_inode_table_loc(fs, i)) &&
4037                     (blk < (ext2fs_inode_table_loc(fs, i) +
4038                             fs->inode_blocks_per_group))) {
4039                         /*
4040                          * If there are bad blocks in the inode table,
4041                          * the inode scan code will try to do
4042                          * something reasonable automatically.
4043                          */
4044                         return 0;
4045                 }
4046                 first_block += fs->super->s_blocks_per_group;
4047         }
4048         /*
4049          * If we've gotten to this point, then the only
4050          * possibility is that the bad block inode meta data
4051          * is using a bad block.
4052          */
4053         if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) ||
4054             (blk == p->inode->i_block[EXT2_DIND_BLOCK]) ||
4055             (blk == p->inode->i_block[EXT2_TIND_BLOCK])) {
4056                 p->bbcheck = 1;
4057                 if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, pctx)) {
4058                         *block_nr = 0;
4059                         return BLOCK_CHANGED;
4060                 }
4061                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
4062                         return BLOCK_ABORT;
4063                 return 0;
4064         }
4065
4066         pctx->group = -1;
4067
4068         /* Warn user that the block wasn't claimed */
4069         fix_problem(ctx, PR_1_PROGERR_CLAIMED_BLOCK, pctx);
4070
4071         return 0;
4072 }
4073
4074 static void new_table_block(e2fsck_t ctx, blk64_t first_block, dgrp_t group,
4075                             const char *name, int num, blk64_t *new_block)
4076 {
4077         ext2_filsys fs = ctx->fs;
4078         dgrp_t          last_grp;
4079         blk64_t         old_block = *new_block;
4080         blk64_t         last_block;
4081         dgrp_t          flexbg;
4082         unsigned        flexbg_size;
4083         int             i, is_flexbg;
4084         char            *buf;
4085         struct problem_context  pctx;
4086
4087         clear_problem_context(&pctx);
4088
4089         pctx.group = group;
4090         pctx.blk = old_block;
4091         pctx.str = name;
4092
4093         /*
4094          * For flex_bg filesystems, first try to allocate the metadata
4095          * within the flex_bg, and if that fails then try finding the
4096          * space anywhere in the filesystem.
4097          */
4098         is_flexbg = ext2fs_has_feature_flex_bg(fs->super);
4099         if (is_flexbg) {
4100                 flexbg_size = 1U << fs->super->s_log_groups_per_flex;
4101                 flexbg = group / flexbg_size;
4102                 first_block = ext2fs_group_first_block2(fs,
4103                                                         flexbg_size * flexbg);
4104                 last_grp = group | (flexbg_size - 1);
4105                 if (last_grp >= fs->group_desc_count)
4106                         last_grp = fs->group_desc_count - 1;
4107                 last_block = ext2fs_group_last_block2(fs, last_grp);
4108         } else
4109                 last_block = ext2fs_group_last_block2(fs, group);
4110         pctx.errcode = ext2fs_get_free_blocks2(fs, first_block, last_block,
4111                                                num, ctx->block_found_map,
4112                                                new_block);
4113         if (is_flexbg && (pctx.errcode == EXT2_ET_BLOCK_ALLOC_FAIL))
4114                 pctx.errcode = ext2fs_get_free_blocks2(fs,
4115                                 fs->super->s_first_data_block,
4116                                 ext2fs_blocks_count(fs->super),
4117                                 num, ctx->block_found_map, new_block);
4118         if (pctx.errcode) {
4119                 pctx.num = num;
4120                 fix_problem(ctx, PR_1_RELOC_BLOCK_ALLOCATE, &pctx);
4121                 ext2fs_unmark_valid(fs);
4122                 ctx->flags |= E2F_FLAG_ABORT;
4123                 return;
4124         }
4125         pctx.errcode = ext2fs_get_mem(fs->blocksize, &buf);
4126         if (pctx.errcode) {
4127                 fix_problem(ctx, PR_1_RELOC_MEMORY_ALLOCATE, &pctx);
4128                 ext2fs_unmark_valid(fs);
4129                 ctx->flags |= E2F_FLAG_ABORT;
4130                 return;
4131         }
4132         ext2fs_mark_super_dirty(fs);
4133         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
4134         pctx.blk2 = *new_block;
4135         fix_problem(ctx, (old_block ? PR_1_RELOC_FROM_TO :
4136                           PR_1_RELOC_TO), &pctx);
4137         pctx.blk2 = 0;
4138         for (i = 0; i < num; i++) {
4139                 pctx.blk = i;
4140                 ext2fs_mark_block_bitmap2(ctx->block_found_map, (*new_block)+i);
4141                 if (old_block) {
4142                         pctx.errcode = io_channel_read_blk64(fs->io,
4143                                    old_block + i, 1, buf);
4144                         if (pctx.errcode)
4145                                 fix_problem(ctx, PR_1_RELOC_READ_ERR, &pctx);
4146                         pctx.blk = (*new_block) + i;
4147                         pctx.errcode = io_channel_write_blk64(fs->io, pctx.blk,
4148                                                               1, buf);
4149                 } else {
4150                         pctx.blk = (*new_block) + i;
4151                         pctx.errcode = ext2fs_zero_blocks2(fs, pctx.blk, 1,
4152                                                            NULL, NULL);
4153                 }
4154
4155                 if (pctx.errcode)
4156                         fix_problem(ctx, PR_1_RELOC_WRITE_ERR, &pctx);
4157         }
4158         ext2fs_free_mem(&buf);
4159 }
4160
4161 /*
4162  * This routine gets called at the end of pass 1 if bad blocks are
4163  * detected in the superblock, group descriptors, inode_bitmaps, or
4164  * block bitmaps.  At this point, all of the blocks have been mapped
4165  * out, so we can try to allocate new block(s) to replace the bad
4166  * blocks.
4167  */
4168 static void handle_fs_bad_blocks(e2fsck_t ctx)
4169 {
4170         ext2_filsys fs = ctx->fs;
4171         dgrp_t          i;
4172         blk64_t         first_block;
4173         blk64_t         new_blk;
4174
4175         for (i = 0; i < fs->group_desc_count; i++) {
4176                 first_block = ext2fs_group_first_block2(fs, i);
4177
4178                 if (ctx->invalid_block_bitmap_flag[i]) {
4179                         new_blk = ext2fs_block_bitmap_loc(fs, i);
4180                         new_table_block(ctx, first_block, i, _("block bitmap"),
4181                                         1, &new_blk);
4182                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
4183                 }
4184                 if (ctx->invalid_inode_bitmap_flag[i]) {
4185                         new_blk = ext2fs_inode_bitmap_loc(fs, i);
4186                         new_table_block(ctx, first_block, i, _("inode bitmap"),
4187                                         1, &new_blk);
4188                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
4189                 }
4190                 if (ctx->invalid_inode_table_flag[i]) {
4191                         new_blk = ext2fs_inode_table_loc(fs, i);
4192                         new_table_block(ctx, first_block, i, _("inode table"),
4193                                         fs->inode_blocks_per_group,
4194                                         &new_blk);
4195                         ext2fs_inode_table_loc_set(fs, i, new_blk);
4196                         ctx->flags |= E2F_FLAG_RESTART;
4197                 }
4198         }
4199         ctx->invalid_bitmaps = 0;
4200 }
4201
4202 /*
4203  * This routine marks all blocks which are used by the superblock,
4204  * group descriptors, inode bitmaps, and block bitmaps.
4205  */
4206 static void mark_table_blocks(e2fsck_t ctx)
4207 {
4208         ext2_filsys fs = ctx->fs;
4209         blk64_t b;
4210         dgrp_t  i;
4211         unsigned int    j;
4212         struct problem_context pctx;
4213
4214         clear_problem_context(&pctx);
4215
4216         for (i = 0; i < fs->group_desc_count; i++) {
4217                 pctx.group = i;
4218
4219                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_found_map);
4220                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_metadata_map);
4221
4222                 /*
4223                  * Mark the blocks used for the inode table
4224                  */
4225                 if (ext2fs_inode_table_loc(fs, i)) {
4226                         for (j = 0, b = ext2fs_inode_table_loc(fs, i);
4227                              j < fs->inode_blocks_per_group;
4228                              j++, b++) {
4229                                 if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4230                                                              b)) {
4231                                         pctx.blk = b;
4232                                         if (!ctx->invalid_inode_table_flag[i] &&
4233                                             fix_problem(ctx,
4234                                                 PR_1_ITABLE_CONFLICT, &pctx)) {
4235                                                 ctx->invalid_inode_table_flag[i]++;
4236                                                 ctx->invalid_bitmaps++;
4237                                         }
4238                                 } else {
4239                                     ext2fs_mark_block_bitmap2(
4240                                                 ctx->block_found_map, b);
4241                                     ext2fs_mark_block_bitmap2(
4242                                                 ctx->block_metadata_map, b);
4243                                 }
4244                         }
4245                 }
4246
4247                 /*
4248                  * Mark block used for the block bitmap
4249                  */
4250                 if (ext2fs_block_bitmap_loc(fs, i)) {
4251                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4252                                      ext2fs_block_bitmap_loc(fs, i))) {
4253                                 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
4254                                 if (fix_problem(ctx, PR_1_BB_CONFLICT, &pctx)) {
4255                                         ctx->invalid_block_bitmap_flag[i]++;
4256                                         ctx->invalid_bitmaps++;
4257                                 }
4258                         } else {
4259                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4260                                      ext2fs_block_bitmap_loc(fs, i));
4261                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4262                                      ext2fs_block_bitmap_loc(fs, i));
4263                         }
4264                 }
4265                 /*
4266                  * Mark block used for the inode bitmap
4267                  */
4268                 if (ext2fs_inode_bitmap_loc(fs, i)) {
4269                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4270                                      ext2fs_inode_bitmap_loc(fs, i))) {
4271                                 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
4272                                 if (fix_problem(ctx, PR_1_IB_CONFLICT, &pctx)) {
4273                                         ctx->invalid_inode_bitmap_flag[i]++;
4274                                         ctx->invalid_bitmaps++;
4275                                 }
4276                         } else {
4277                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4278                                      ext2fs_inode_bitmap_loc(fs, i));
4279                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4280                                      ext2fs_inode_bitmap_loc(fs, i));
4281                         }
4282                 }
4283         }
4284 }
4285
4286 /*
4287  * These subroutines short circuits ext2fs_get_blocks and
4288  * ext2fs_check_directory; we use them since we already have the inode
4289  * structure, so there's no point in letting the ext2fs library read
4290  * the inode again.
4291  */
4292 static errcode_t pass1_get_blocks(ext2_filsys fs, ext2_ino_t ino,
4293                                   blk_t *blocks)
4294 {
4295         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4296         int     i;
4297
4298         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4299                 return EXT2_ET_CALLBACK_NOTHANDLED;
4300
4301         for (i=0; i < EXT2_N_BLOCKS; i++)
4302                 blocks[i] = ctx->stashed_inode->i_block[i];
4303         return 0;
4304 }
4305
4306 static errcode_t pass1_read_inode(ext2_filsys fs, ext2_ino_t ino,
4307                                   struct ext2_inode *inode)
4308 {
4309         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4310
4311         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4312                 return EXT2_ET_CALLBACK_NOTHANDLED;
4313         *inode = *ctx->stashed_inode;
4314         return 0;
4315 }
4316
4317 static errcode_t pass1_write_inode(ext2_filsys fs, ext2_ino_t ino,
4318                             struct ext2_inode *inode)
4319 {
4320         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4321
4322         if ((ino == ctx->stashed_ino) && ctx->stashed_inode &&
4323                 (inode != ctx->stashed_inode))
4324                 *ctx->stashed_inode = *inode;
4325         return EXT2_ET_CALLBACK_NOTHANDLED;
4326 }
4327
4328 static errcode_t pass1_check_directory(ext2_filsys fs, ext2_ino_t ino)
4329 {
4330         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4331
4332         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4333                 return EXT2_ET_CALLBACK_NOTHANDLED;
4334
4335         if (!LINUX_S_ISDIR(ctx->stashed_inode->i_mode))
4336                 return EXT2_ET_NO_DIRECTORY;
4337         return 0;
4338 }
4339
4340 static errcode_t e2fsck_get_alloc_block(ext2_filsys fs, blk64_t goal,
4341                                         blk64_t *ret)
4342 {
4343         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4344         errcode_t       retval;
4345         blk64_t         new_block;
4346
4347         if (ctx->block_found_map) {
4348                 retval = ext2fs_new_block2(fs, goal, ctx->block_found_map,
4349                                            &new_block);
4350                 if (retval)
4351                         return retval;
4352                 if (fs->block_map) {
4353                         ext2fs_mark_block_bitmap2(fs->block_map, new_block);
4354                         ext2fs_mark_bb_dirty(fs);
4355                 }
4356         } else {
4357                 if (!fs->block_map) {
4358                         retval = ext2fs_read_block_bitmap(fs);
4359                         if (retval)
4360                                 return retval;
4361                 }
4362
4363                 retval = ext2fs_new_block2(fs, goal, fs->block_map, &new_block);
4364                 if (retval)
4365                         return retval;
4366         }
4367
4368         *ret = new_block;
4369         return (0);
4370 }
4371
4372 static errcode_t e2fsck_new_range(ext2_filsys fs, int flags, blk64_t goal,
4373                                   blk64_t len, blk64_t *pblk, blk64_t *plen)
4374 {
4375         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4376         errcode_t       retval;
4377
4378         if (ctx->block_found_map)
4379                 return ext2fs_new_range(fs, flags, goal, len,
4380                                         ctx->block_found_map, pblk, plen);
4381
4382         if (!fs->block_map) {
4383                 retval = ext2fs_read_block_bitmap(fs);
4384                 if (retval)
4385                         return retval;
4386         }
4387
4388         return ext2fs_new_range(fs, flags, goal, len, fs->block_map,
4389                                 pblk, plen);
4390 }
4391
4392 static void e2fsck_block_alloc_stats(ext2_filsys fs, blk64_t blk, int inuse)
4393 {
4394         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4395
4396         /* Never free a critical metadata block */
4397         if (ctx->block_found_map &&
4398             ctx->block_metadata_map &&
4399             inuse < 0 &&
4400             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk))
4401                 return;
4402
4403         if (ctx->block_found_map) {
4404                 if (inuse > 0)
4405                         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4406                 else
4407                         ext2fs_unmark_block_bitmap2(ctx->block_found_map, blk);
4408         }
4409 }
4410
4411 static void e2fsck_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
4412                                            blk_t num, int inuse)
4413 {
4414         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4415
4416         /* Never free a critical metadata block */
4417         if (ctx->block_found_map &&
4418             ctx->block_metadata_map &&
4419             inuse < 0 &&
4420             ext2fs_test_block_bitmap_range2(ctx->block_metadata_map, blk, num))
4421                 return;
4422
4423         if (ctx->block_found_map) {
4424                 if (inuse > 0)
4425                         ext2fs_mark_block_bitmap_range2(ctx->block_found_map,
4426                                                         blk, num);
4427                 else
4428                         ext2fs_unmark_block_bitmap_range2(ctx->block_found_map,
4429                                                         blk, num);
4430         }
4431 }
4432
4433 void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts)
4434 {
4435         ext2_filsys fs = ctx->fs;
4436
4437         if (use_shortcuts) {
4438                 fs->get_blocks = pass1_get_blocks;
4439                 fs->check_directory = pass1_check_directory;
4440                 fs->read_inode = pass1_read_inode;
4441                 fs->write_inode = pass1_write_inode;
4442                 ctx->stashed_ino = 0;
4443         } else {
4444                 fs->get_blocks = 0;
4445                 fs->check_directory = 0;
4446                 fs->read_inode = 0;
4447                 fs->write_inode = 0;
4448         }
4449 }
4450
4451 void e2fsck_intercept_block_allocations(e2fsck_t ctx)
4452 {
4453         ext2fs_set_alloc_block_callback(ctx->fs, e2fsck_get_alloc_block, 0);
4454         ext2fs_set_block_alloc_stats_callback(ctx->fs,
4455                                                 e2fsck_block_alloc_stats, 0);
4456         ext2fs_set_new_range_callback(ctx->fs, e2fsck_new_range, NULL);
4457         ext2fs_set_block_alloc_stats_range_callback(ctx->fs,
4458                                         e2fsck_block_alloc_stats_range, NULL);
4459 }