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                                          size_t *sz)
 918 {
 919         void *p;
 920         struct ext2_xattr_handle *handle;
 921         errcode_t retval;
 922
 923         retval = ext2fs_xattrs_open(fs, ino, &handle);
 924         if (retval)
 925                 return retval;
 926
 927         retval = ext2fs_xattrs_read(handle);
 928         if (retval)
 929                 goto err;
 930
 931         retval = ext2fs_xattr_get(handle, "system.data", &p, sz);
 932         if (retval)
 933                 goto err;
 934         ext2fs_free_mem(&p);
 935 err:
 936         (void) ext2fs_xattrs_close(&handle);
 937         return retval;
 938 }
 939
 940 static void finish_processing_inode(e2fsck_t ctx, ext2_ino_t ino,
 941                                     struct problem_context *pctx,
 942                                     int failed_csum)
 943 {
 944         if (!failed_csum)
 945                 return;
 946
 947         /*
 948          * If the inode failed the checksum and the user didn't
 949          * clear the inode, test the checksum again -- if it still
 950          * fails, ask the user if the checksum should be corrected.
 951          */
 952         pctx->errcode = recheck_bad_inode_checksum(ctx->fs, ino, ctx, pctx);
 953         if (pctx->errcode)
 954                 ctx->flags |= E2F_FLAG_ABORT;
 955 }
 956 #define FINISH_INODE_LOOP(ctx, ino, pctx, failed_csum) \
 957         do { \
 958                 finish_processing_inode((ctx), (ino), (pctx), (failed_csum)); \
 959                 if ((ctx)->flags & E2F_FLAG_ABORT) \
 960                         return; \
 961         } while (0)
 962
 963 static int could_be_block_map(ext2_filsys fs, struct ext2_inode *inode)
 964 {
 965         __u32 x;
 966         int i;
 967
 968         for (i = 0; i < EXT2_N_BLOCKS; i++) {
 969                 x = inode->i_block[i];
 970 #ifdef WORDS_BIGENDIAN
 971                 x = ext2fs_swab32(x);
 972 #endif
 973                 if (x >= ext2fs_blocks_count(fs->super))
 974                         return 0;
 975         }
 976
 977         return 1;
 978 }
 979
 980 /*
 981  * Figure out what to do with an inode that has both extents and inline data
 982  * inode flags set.  Returns -1 if we decide to erase the inode, 0 otherwise.
 983  */
 984 static int fix_inline_data_extents_file(e2fsck_t ctx,
 985                                         ext2_ino_t ino,
 986                                         struct ext2_inode *inode,
 987                                         int inode_size,
 988                                         struct problem_context *pctx)
 989 {
 990         size_t max_inline_ea_size;
 991         ext2_filsys fs = ctx->fs;
 992         int dirty = 0;
 993
 994         /* Both feature flags not set?  Just run the regular checks */
 995         if (!ext2fs_has_feature_extents(fs->super) &&
 996             !ext2fs_has_feature_inline_data(fs->super))
 997                 return 0;
 998
 999         /* Clear both flags if it's a special file */
1000         if (LINUX_S_ISCHR(inode->i_mode) ||
1001             LINUX_S_ISBLK(inode->i_mode) ||
1002             LINUX_S_ISFIFO(inode->i_mode) ||
1003             LINUX_S_ISSOCK(inode->i_mode)) {
1004                 check_extents_inlinedata(ctx, pctx);
1005                 return 0;
1006         }
1007
1008         /* If it looks like an extent tree, try to clear inlinedata */
1009         if (ext2fs_extent_header_verify(inode->i_block,
1010                                  sizeof(inode->i_block)) == 0 &&
1011             fix_problem(ctx, PR_1_CLEAR_INLINE_DATA_FOR_EXTENT, pctx)) {
1012                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1013                 dirty = 1;
1014                 goto out;
1015         }
1016
1017         /* If it looks short enough to be inline data, try to clear extents */
1018         if (inode_size > EXT2_GOOD_OLD_INODE_SIZE)
1019                 max_inline_ea_size = inode_size -
1020                                      (EXT2_GOOD_OLD_INODE_SIZE +
1021                                       ((struct ext2_inode_large *)inode)->i_extra_isize);
1022         else
1023                 max_inline_ea_size = 0;
1024         if (EXT2_I_SIZE(inode) <
1025             EXT4_MIN_INLINE_DATA_SIZE + max_inline_ea_size &&
1026             fix_problem(ctx, PR_1_CLEAR_EXTENT_FOR_INLINE_DATA, pctx)) {
1027                 inode->i_flags &= ~EXT4_EXTENTS_FL;
1028                 dirty = 1;
1029                 goto out;
1030         }
1031
1032         /*
1033          * Too big for inline data, but no evidence of extent tree -
1034          * maybe it's a block map file?  If the mappings all look valid?
1035          */
1036         if (could_be_block_map(fs, inode) &&
1037             fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_FLAGS, pctx)) {
1038 #ifdef WORDS_BIGENDIAN
1039                 int i;
1040
1041                 for (i = 0; i < EXT2_N_BLOCKS; i++)
1042                         inode->i_block[i] = ext2fs_swab32(inode->i_block[i]);
1043 #endif
1044
1045                 inode->i_flags &= ~(EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL);
1046                 dirty = 1;
1047                 goto out;
1048         }
1049
1050         /* Oh well, just clear the busted inode. */
1051         if (fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_INODE, pctx)) {
1052                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1053                 return -1;
1054         }
1055
1056 out:
1057         if (dirty)
1058                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1059
1060         return 0;
1061 }
1062
1063 static void pass1_readahead(e2fsck_t ctx, dgrp_t *group, ext2_ino_t *next_ino)
1064 {
1065         ext2_ino_t inodes_in_group = 0, inodes_per_block, inodes_per_buffer;
1066         dgrp_t start = *group, grp;
1067         blk64_t blocks_to_read = 0;
1068         errcode_t err = EXT2_ET_INVALID_ARGUMENT;
1069
1070         if (ctx->readahead_kb == 0)
1071                 goto out;
1072
1073         /* Keep iterating groups until we have enough to readahead */
1074         inodes_per_block = EXT2_INODES_PER_BLOCK(ctx->fs->super);
1075         for (grp = start; grp < ctx->fs->group_desc_count; grp++) {
1076                 if (ext2fs_bg_flags_test(ctx->fs, grp, EXT2_BG_INODE_UNINIT))
1077                         continue;
1078                 inodes_in_group = ctx->fs->super->s_inodes_per_group -
1079                                         ext2fs_bg_itable_unused(ctx->fs, grp);
1080                 blocks_to_read += (inodes_in_group + inodes_per_block - 1) /
1081                                         inodes_per_block;
1082                 if (blocks_to_read * ctx->fs->blocksize >
1083                     ctx->readahead_kb * 1024)
1084                         break;
1085         }
1086
1087         err = e2fsck_readahead(ctx->fs, E2FSCK_READA_ITABLE, start,
1088                                grp - start + 1);
1089         if (err == EAGAIN) {
1090                 ctx->readahead_kb /= 2;
1091                 err = 0;
1092         }
1093
1094 out:
1095         if (err) {
1096                 /* Error; disable itable readahead */
1097                 *group = ctx->fs->group_desc_count;
1098                 *next_ino = ctx->fs->super->s_inodes_count;
1099         } else {
1100                 /*
1101                  * Don't do more readahead until we've reached the first inode
1102                  * of the last inode scan buffer block for the last group.
1103                  */
1104                 *group = grp + 1;
1105                 inodes_per_buffer = (ctx->inode_buffer_blocks ?
1106                                      ctx->inode_buffer_blocks :
1107                                      EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS) *
1108                                     ctx->fs->blocksize /
1109                                     EXT2_INODE_SIZE(ctx->fs->super);
1110                 inodes_in_group--;
1111                 *next_ino = inodes_in_group -
1112                             (inodes_in_group % inodes_per_buffer) + 1 +
1113                             (grp * ctx->fs->super->s_inodes_per_group);
1114         }
1115 }
1116
1117 /*
1118  * Check if the passed ino is one of the used superblock quota inodes.
1119  *
1120  * Before the quota inodes were journaled, older superblock quota inodes
1121  * were just regular files in the filesystem and not reserved inodes.  This
1122  * checks if the passed ino is one of the s_*_quota_inum superblock fields,
1123  * which may not always be the same as the EXT4_*_QUOTA_INO fields.
1124  */
1125 static int quota_inum_is_super(struct ext2_super_block *sb, ext2_ino_t ino)
1126 {
1127         enum quota_type qtype;
1128
1129         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1130                 if (*quota_sb_inump(sb, qtype) == ino)
1131                         return 1;
1132
1133         return 0;
1134 }
1135
1136 /*
1137  * Check if the passed ino is one of the reserved quota inodes.
1138  * This checks if the inode number is one of the reserved EXT4_*_QUOTA_INO
1139  * inodes.  These inodes may or may not be in use by the quota feature.
1140  */
1141 static int quota_inum_is_reserved(ext2_filsys fs, ext2_ino_t ino)
1142 {
1143         enum quota_type qtype;
1144
1145         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1146                 if (quota_type2inum(qtype, fs->super) == ino)
1147                         return 1;
1148
1149         return 0;
1150 }
1151
1152 void e2fsck_pass1(e2fsck_t ctx)
1153 {
1154         int     i;
1155         __u64   max_sizes;
1156         ext2_filsys fs = ctx->fs;
1157         ext2_ino_t      ino = 0;
1158         struct ext2_inode *inode = NULL;
1159         ext2_inode_scan scan = NULL;
1160         char            *block_buf = NULL;
1161 #ifdef RESOURCE_TRACK
1162         struct resource_track   rtrack;
1163 #endif
1164         unsigned char   frag, fsize;
1165         struct          problem_context pctx;
1166         struct          scan_callback_struct scan_struct;
1167         struct ext2_super_block *sb = ctx->fs->super;
1168         const char      *old_op;
1169         const char      *eop_next_inode = _("getting next inode from scan");
1170         int             imagic_fs, extent_fs, inlinedata_fs, casefold_fs;
1171         int             low_dtime_check = 1;
1172         unsigned int    inode_size = EXT2_INODE_SIZE(fs->super);
1173         unsigned int    bufsize;
1174         int             failed_csum = 0;
1175         ext2_ino_t      ino_threshold = 0;
1176         dgrp_t          ra_group = 0;
1177         struct ea_quota ea_ibody_quota;
1178
1179         init_resource_track(&rtrack, ctx->fs->io);
1180         clear_problem_context(&pctx);
1181
1182         /* If we can do readahead, figure out how many groups to pull in. */
1183         if (!e2fsck_can_readahead(ctx->fs))
1184                 ctx->readahead_kb = 0;
1185         else if (ctx->readahead_kb == ~0ULL)
1186                 ctx->readahead_kb = e2fsck_guess_readahead(ctx->fs);
1187         pass1_readahead(ctx, &ra_group, &ino_threshold);
1188
1189         if (!(ctx->options & E2F_OPT_PREEN))
1190                 fix_problem(ctx, PR_1_PASS_HEADER, &pctx);
1191
1192         if (ext2fs_has_feature_dir_index(fs->super) &&
1193             !(ctx->options & E2F_OPT_NO)) {
1194                 if (ext2fs_u32_list_create(&ctx->dirs_to_hash, 50))
1195                         ctx->dirs_to_hash = 0;
1196         }
1197
1198 #ifdef MTRACE
1199         mtrace_print("Pass 1");
1200 #endif
1201
1202 #define EXT2_BPP(bits) (1ULL << ((bits) - 2))
1203
1204         for (i = EXT2_MIN_BLOCK_LOG_SIZE; i <= EXT2_MAX_BLOCK_LOG_SIZE; i++) {
1205                 max_sizes = EXT2_NDIR_BLOCKS + EXT2_BPP(i);
1206                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i);
1207                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i) * EXT2_BPP(i);
1208                 max_sizes = (max_sizes * (1UL << i));
1209                 ext2_max_sizes[i - EXT2_MIN_BLOCK_LOG_SIZE] = max_sizes;
1210         }
1211 #undef EXT2_BPP
1212
1213         imagic_fs = ext2fs_has_feature_imagic_inodes(sb);
1214         extent_fs = ext2fs_has_feature_extents(sb);
1215         inlinedata_fs = ext2fs_has_feature_inline_data(sb);
1216         casefold_fs = ext2fs_has_feature_casefold(sb);
1217
1218         /*
1219          * Allocate bitmaps structures
1220          */
1221         pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("in-use inode map"),
1222                                                     EXT2FS_BMAP64_RBTREE,
1223                                                     "inode_used_map",
1224                                                     &ctx->inode_used_map);
1225         if (pctx.errcode) {
1226                 pctx.num = 1;
1227                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1228                 ctx->flags |= E2F_FLAG_ABORT;
1229                 return;
1230         }
1231         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1232                         _("directory inode map"),
1233                         EXT2FS_BMAP64_AUTODIR,
1234                         "inode_dir_map", &ctx->inode_dir_map);
1235         if (pctx.errcode) {
1236                 pctx.num = 2;
1237                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1238                 ctx->flags |= E2F_FLAG_ABORT;
1239                 return;
1240         }
1241         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1242                         _("regular file inode map"), EXT2FS_BMAP64_RBTREE,
1243                         "inode_reg_map", &ctx->inode_reg_map);
1244         if (pctx.errcode) {
1245                 pctx.num = 6;
1246                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1247                 ctx->flags |= E2F_FLAG_ABORT;
1248                 return;
1249         }
1250         pctx.errcode = e2fsck_allocate_subcluster_bitmap(fs,
1251                         _("in-use block map"), EXT2FS_BMAP64_RBTREE,
1252                         "block_found_map", &ctx->block_found_map);
1253         if (pctx.errcode) {
1254                 pctx.num = 1;
1255                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1256                 ctx->flags |= E2F_FLAG_ABORT;
1257                 return;
1258         }
1259         pctx.errcode = e2fsck_allocate_block_bitmap(fs,
1260                         _("metadata block map"), EXT2FS_BMAP64_RBTREE,
1261                         "block_metadata_map", &ctx->block_metadata_map);
1262         if (pctx.errcode) {
1263                 pctx.num = 1;
1264                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1265                 ctx->flags |= E2F_FLAG_ABORT;
1266                 return;
1267         }
1268         if (casefold_fs) {
1269                 pctx.errcode =
1270                         e2fsck_allocate_inode_bitmap(fs,
1271                                                      _("inode casefold map"),
1272                                                      EXT2FS_BMAP64_RBTREE,
1273                                                      "inode_casefold_map",
1274                                                      &ctx->inode_casefold_map);
1275                 if (pctx.errcode) {
1276                         pctx.num = 1;
1277                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1278                         ctx->flags |= E2F_FLAG_ABORT;
1279                         return;
1280                 }
1281         }
1282         pctx.errcode = e2fsck_setup_icount(ctx, "inode_link_info", 0, NULL,
1283                                            &ctx->inode_link_info);
1284         if (pctx.errcode) {
1285                 fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
1286                 ctx->flags |= E2F_FLAG_ABORT;
1287                 return;
1288         }
1289         bufsize = inode_size;
1290         if (bufsize < sizeof(struct ext2_inode_large))
1291                 bufsize = sizeof(struct ext2_inode_large);
1292         inode = (struct ext2_inode *)
1293                 e2fsck_allocate_memory(ctx, bufsize, "scratch inode");
1294
1295         inodes_to_process = (struct process_inode_block *)
1296                 e2fsck_allocate_memory(ctx,
1297                                        (ctx->process_inode_size *
1298                                         sizeof(struct process_inode_block)),
1299                                        "array of inodes to process");
1300         process_inode_count = 0;
1301
1302         pctx.errcode = ext2fs_init_dblist(fs, 0);
1303         if (pctx.errcode) {
1304                 fix_problem(ctx, PR_1_ALLOCATE_DBCOUNT, &pctx);
1305                 ctx->flags |= E2F_FLAG_ABORT;
1306                 goto endit;
1307         }
1308
1309         /*
1310          * If the last orphan field is set, clear it, since the pass1
1311          * processing will automatically find and clear the orphans.
1312          * In the future, we may want to try using the last_orphan
1313          * linked list ourselves, but for now, we clear it so that the
1314          * ext3 mount code won't get confused.
1315          */
1316         if (!(ctx->options & E2F_OPT_READONLY)) {
1317                 if (fs->super->s_last_orphan) {
1318                         fs->super->s_last_orphan = 0;
1319                         ext2fs_mark_super_dirty(fs);
1320                 }
1321         }
1322
1323         mark_table_blocks(ctx);
1324         pctx.errcode = ext2fs_convert_subcluster_bitmap(fs,
1325                                                 &ctx->block_found_map);
1326         if (pctx.errcode) {
1327                 fix_problem(ctx, PR_1_CONVERT_SUBCLUSTER, &pctx);
1328                 ctx->flags |= E2F_FLAG_ABORT;
1329                 goto endit;
1330         }
1331         block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3,
1332                                                     "block interate buffer");
1333         if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
1334                 e2fsck_use_inode_shortcuts(ctx, 1);
1335         e2fsck_intercept_block_allocations(ctx);
1336         old_op = ehandler_operation(_("opening inode scan"));
1337         pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks,
1338                                               &scan);
1339         ehandler_operation(old_op);
1340         if (pctx.errcode) {
1341                 fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1342                 ctx->flags |= E2F_FLAG_ABORT;
1343                 goto endit;
1344         }
1345         ext2fs_inode_scan_flags(scan, EXT2_SF_SKIP_MISSING_ITABLE |
1346                                       EXT2_SF_WARN_GARBAGE_INODES, 0);
1347         ctx->stashed_inode = inode;
1348         scan_struct.ctx = ctx;
1349         scan_struct.block_buf = block_buf;
1350         ext2fs_set_inode_callback(scan, scan_callback, &scan_struct);
1351         if (ctx->progress && ((ctx->progress)(ctx, 1, 0,
1352                                               ctx->fs->group_desc_count)))
1353                 goto endit;
1354         if ((fs->super->s_wtime &&
1355              fs->super->s_wtime < fs->super->s_inodes_count) ||
1356             (fs->super->s_mtime &&
1357              fs->super->s_mtime < fs->super->s_inodes_count) ||
1358             (fs->super->s_mkfs_time &&
1359              fs->super->s_mkfs_time < fs->super->s_inodes_count))
1360                 low_dtime_check = 0;
1361
1362         if (ext2fs_has_feature_mmp(fs->super) &&
1363             fs->super->s_mmp_block > fs->super->s_first_data_block &&
1364             fs->super->s_mmp_block < ext2fs_blocks_count(fs->super))
1365                 ext2fs_mark_block_bitmap2(ctx->block_found_map,
1366                                           fs->super->s_mmp_block);
1367
1368         /* Set up ctx->lost_and_found if possible */
1369         (void) e2fsck_get_lost_and_found(ctx, 0);
1370
1371         while (1) {
1372                 if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
1373                         if (e2fsck_mmp_update(fs))
1374                                 fatal_error(ctx, 0);
1375                 }
1376                 old_op = ehandler_operation(eop_next_inode);
1377                 pctx.errcode = ext2fs_get_next_inode_full(scan, &ino,
1378                                                           inode, inode_size);
1379                 if (ino > ino_threshold)
1380                         pass1_readahead(ctx, &ra_group, &ino_threshold);
1381                 ehandler_operation(old_op);
1382                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1383                         goto endit;
1384                 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) {
1385                         /*
1386                          * If badblocks says badblocks is bad, offer to clear
1387                          * the list, update the in-core bb list, and restart
1388                          * the inode scan.
1389                          */
1390                         if (ino == EXT2_BAD_INO &&
1391                             fix_problem(ctx, PR_1_BADBLOCKS_IN_BADBLOCKS,
1392                                         &pctx)) {
1393                                 errcode_t err;
1394
1395                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1396                                 ext2fs_badblocks_list_free(ctx->fs->badblocks);
1397                                 ctx->fs->badblocks = NULL;
1398                                 err = ext2fs_read_bb_inode(ctx->fs,
1399                                                         &ctx->fs->badblocks);
1400                                 if (err) {
1401                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1402                                                     &pctx);
1403                                         ctx->flags |= E2F_FLAG_ABORT;
1404                                 } else
1405                                         ctx->flags |= E2F_FLAG_RESTART;
1406                                 goto endit;
1407                         }
1408                         if (!ctx->inode_bb_map)
1409                                 alloc_bb_map(ctx);
1410                         ext2fs_mark_inode_bitmap2(ctx->inode_bb_map, ino);
1411                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1412                         continue;
1413                 }
1414                 if (pctx.errcode &&
1415                     pctx.errcode != EXT2_ET_INODE_CSUM_INVALID &&
1416                     pctx.errcode != EXT2_ET_INODE_IS_GARBAGE) {
1417                         fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1418                         ctx->flags |= E2F_FLAG_ABORT;
1419                         goto endit;
1420                 }
1421                 if (!ino)
1422                         break;
1423                 pctx.ino = ino;
1424                 pctx.inode = inode;
1425                 ctx->stashed_ino = ino;
1426
1427                 /* Clear trashed inode? */
1428                 if (pctx.errcode == EXT2_ET_INODE_IS_GARBAGE &&
1429                     inode->i_links_count > 0 &&
1430                     fix_problem(ctx, PR_1_INODE_IS_GARBAGE, &pctx)) {
1431                         pctx.errcode = 0;
1432                         e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1433                 }
1434                 failed_csum = pctx.errcode != 0;
1435
1436                 /*
1437                  * Check for inodes who might have been part of the
1438                  * orphaned list linked list.  They should have gotten
1439                  * dealt with by now, unless the list had somehow been
1440                  * corrupted.
1441                  *
1442                  * FIXME: In the future, inodes which are still in use
1443                  * (and which are therefore) pending truncation should
1444                  * be handled specially.  Right now we just clear the
1445                  * dtime field, and the normal e2fsck handling of
1446                  * inodes where i_size and the inode blocks are
1447                  * inconsistent is to fix i_size, instead of releasing
1448                  * the extra blocks.  This won't catch the inodes that
1449                  * was at the end of the orphan list, but it's better
1450                  * than nothing.  The right answer is that there
1451                  * shouldn't be any bugs in the orphan list handling.  :-)
1452                  */
1453                 if (inode->i_dtime && low_dtime_check &&
1454                     inode->i_dtime < ctx->fs->super->s_inodes_count) {
1455                         if (fix_problem(ctx, PR_1_LOW_DTIME, &pctx)) {
1456                                 inode->i_dtime = inode->i_links_count ?
1457                                         0 : ctx->now;
1458                                 e2fsck_write_inode(ctx, ino, inode,
1459                                                    "pass1");
1460                                 failed_csum = 0;
1461                         }
1462                 }
1463
1464                 if (inode->i_links_count) {
1465                         pctx.errcode = ext2fs_icount_store(ctx->inode_link_info,
1466                                            ino, inode->i_links_count);
1467                         if (pctx.errcode) {
1468                                 pctx.num = inode->i_links_count;
1469                                 fix_problem(ctx, PR_1_ICOUNT_STORE, &pctx);
1470                                 ctx->flags |= E2F_FLAG_ABORT;
1471                                 goto endit;
1472                         }
1473                 } else if ((ino >= EXT2_FIRST_INODE(fs->super)) &&
1474                            !quota_inum_is_reserved(fs, ino)) {
1475                         if (!inode->i_dtime && inode->i_mode) {
1476                                 if (fix_problem(ctx,
1477                                             PR_1_ZERO_DTIME, &pctx)) {
1478                                         inode->i_dtime = ctx->now;
1479                                         e2fsck_write_inode(ctx, ino, inode,
1480                                                            "pass1");
1481                                         failed_csum = 0;
1482                                 }
1483                         }
1484                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1485                         continue;
1486                 }
1487
1488                 if ((inode->i_flags & EXT4_CASEFOLD_FL) &&
1489                     ((!LINUX_S_ISDIR(inode->i_mode) &&
1490                       fix_problem(ctx, PR_1_CASEFOLD_NONDIR, &pctx)) ||
1491                      (!casefold_fs &&
1492                       fix_problem(ctx, PR_1_CASEFOLD_FEATURE, &pctx)))) {
1493                         inode->i_flags &= ~EXT4_CASEFOLD_FL;
1494                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1495                 }
1496
1497                 /* Conflicting inlinedata/extents inode flags? */
1498                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
1499                     (inode->i_flags & EXT4_EXTENTS_FL)) {
1500                         int res = fix_inline_data_extents_file(ctx, ino, inode,
1501                                                                inode_size,
1502                                                                &pctx);
1503                         if (res < 0) {
1504                                 /* skip FINISH_INODE_LOOP */
1505                                 continue;
1506                         }
1507                 }
1508
1509                 /* Test for incorrect inline_data flags settings. */
1510                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && !inlinedata_fs &&
1511                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1512                         size_t size = 0;
1513
1514                         pctx.errcode = get_inline_data_ea_size(fs, ino, &size);
1515                         if (!pctx.errcode &&
1516                             fix_problem(ctx, PR_1_INLINE_DATA_FEATURE, &pctx)) {
1517                                 ext2fs_set_feature_inline_data(sb);
1518                                 ext2fs_mark_super_dirty(fs);
1519                                 inlinedata_fs = 1;
1520                         } else if (fix_problem(ctx, PR_1_INLINE_DATA_SET, &pctx)) {
1521                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1522                                 /* skip FINISH_INODE_LOOP */
1523                                 continue;
1524                         }
1525                 }
1526
1527                 /* Test for inline data flag but no attr */
1528                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && inlinedata_fs &&
1529                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1530                         size_t size = 0;
1531                         errcode_t err;
1532                         int flags;
1533
1534                         flags = fs->flags;
1535                         if (failed_csum)
1536                                 fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1537                         err = get_inline_data_ea_size(fs, ino, &size);
1538                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1539                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1540
1541                         switch (err) {
1542                         case 0:
1543                                 /* Everything is awesome... */
1544                                 break;
1545                         case EXT2_ET_BAD_EA_BLOCK_NUM:
1546                         case EXT2_ET_BAD_EA_HASH:
1547                         case EXT2_ET_BAD_EA_HEADER:
1548                         case EXT2_ET_EA_BAD_NAME_LEN:
1549                         case EXT2_ET_EA_BAD_VALUE_SIZE:
1550                         case EXT2_ET_EA_KEY_NOT_FOUND:
1551                         case EXT2_ET_EA_NO_SPACE:
1552                         case EXT2_ET_MISSING_EA_FEATURE:
1553                         case EXT2_ET_INLINE_DATA_CANT_ITERATE:
1554                         case EXT2_ET_INLINE_DATA_NO_BLOCK:
1555                         case EXT2_ET_INLINE_DATA_NO_SPACE:
1556                         case EXT2_ET_NO_INLINE_DATA:
1557                         case EXT2_ET_EXT_ATTR_CSUM_INVALID:
1558                         case EXT2_ET_EA_BAD_VALUE_OFFSET:
1559                         case EXT2_ET_EA_INODE_CORRUPTED:
1560                                 /* broken EA or no system.data EA; truncate */
1561                                 if (fix_problem(ctx, PR_1_INLINE_DATA_NO_ATTR,
1562                                                 &pctx)) {
1563                                         err = ext2fs_inode_size_set(fs, inode, 0);
1564                                         if (err) {
1565                                                 pctx.errcode = err;
1566                                                 ctx->flags |= E2F_FLAG_ABORT;
1567                                                 goto endit;
1568                                         }
1569                                         inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1570                                         memset(&inode->i_block, 0,
1571                                                sizeof(inode->i_block));
1572                                         e2fsck_write_inode(ctx, ino, inode,
1573                                                            "pass1");
1574                                         failed_csum = 0;
1575                                 }
1576                                 break;
1577                         default:
1578                                 /* Some other kind of non-xattr error? */
1579                                 pctx.errcode = err;
1580                                 ctx->flags |= E2F_FLAG_ABORT;
1581                                 goto endit;
1582                         }
1583                 }
1584
1585                 /*
1586                  * Test for incorrect extent flag settings.
1587                  *
1588                  * On big-endian machines we must be careful:
1589                  * When the inode is read, the i_block array is not swapped
1590                  * if the extent flag is set.  Therefore if we are testing
1591                  * for or fixing a wrongly-set flag, we must potentially
1592                  * (un)swap before testing, or after fixing.
1593                  */
1594
1595                 /*
1596                  * In this case the extents flag was set when read, so
1597                  * extent_header_verify is ok.  If the inode is cleared,
1598                  * no need to swap... so no extra swapping here.
1599                  */
1600                 if ((inode->i_flags & EXT4_EXTENTS_FL) && !extent_fs &&
1601                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1602                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO))) {
1603                         if ((ext2fs_extent_header_verify(inode->i_block,
1604                                                  sizeof(inode->i_block)) == 0) &&
1605                             fix_problem(ctx, PR_1_EXTENT_FEATURE, &pctx)) {
1606                                 ext2fs_set_feature_extents(sb);
1607                                 ext2fs_mark_super_dirty(fs);
1608                                 extent_fs = 1;
1609                         } else if (fix_problem(ctx, PR_1_EXTENTS_SET, &pctx)) {
1610                         clear_inode:
1611                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1612                                 if (ino == EXT2_BAD_INO)
1613                                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map,
1614                                                                  ino);
1615                                 /* skip FINISH_INODE_LOOP */
1616                                 continue;
1617                         }
1618                 }
1619
1620                 /*
1621                  * For big-endian machines:
1622                  * If the inode didn't have the extents flag set when it
1623                  * was read, then the i_blocks array was swapped.  To test
1624                  * as an extents header, we must swap it back first.
1625                  * IF we then set the extents flag, the entire i_block
1626                  * array must be un/re-swapped to make it proper extents data.
1627                  */
1628                 if (extent_fs && !(inode->i_flags & EXT4_EXTENTS_FL) &&
1629                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1630                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO)) &&
1631                     (LINUX_S_ISREG(inode->i_mode) ||
1632                      LINUX_S_ISDIR(inode->i_mode))) {
1633                         void *ehp;
1634 #ifdef WORDS_BIGENDIAN
1635                         __u32 tmp_block[EXT2_N_BLOCKS];
1636
1637                         for (i = 0; i < EXT2_N_BLOCKS; i++)
1638                                 tmp_block[i] = ext2fs_swab32(inode->i_block[i]);
1639                         ehp = tmp_block;
1640 #else
1641                         ehp = inode->i_block;
1642 #endif
1643                         if ((ext2fs_extent_header_verify(ehp,
1644                                          sizeof(inode->i_block)) == 0) &&
1645                             (fix_problem(ctx, PR_1_UNSET_EXTENT_FL, &pctx))) {
1646                                 inode->i_flags |= EXT4_EXTENTS_FL;
1647 #ifdef WORDS_BIGENDIAN
1648                                 memcpy(inode->i_block, tmp_block,
1649                                        sizeof(inode->i_block));
1650 #endif
1651                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1652                                 failed_csum = 0;
1653                         }
1654                 }
1655
1656                 if (ino == EXT2_BAD_INO) {
1657                         struct process_block_struct pb;
1658
1659                         if ((failed_csum || inode->i_mode || inode->i_uid ||
1660                              inode->i_gid || inode->i_links_count ||
1661                              (inode->i_flags & EXT4_INLINE_DATA_FL) ||
1662                              inode->i_file_acl) &&
1663                             fix_problem(ctx, PR_1_INVALID_BAD_INODE, &pctx)) {
1664                                 memset(inode, 0, sizeof(struct ext2_inode));
1665                                 e2fsck_write_inode(ctx, ino, inode,
1666                                                    "clear bad inode");
1667                                 failed_csum = 0;
1668                         }
1669
1670                         pctx.errcode = ext2fs_copy_bitmap(ctx->block_found_map,
1671                                                           &pb.fs_meta_blocks);
1672                         if (pctx.errcode) {
1673                                 pctx.num = 4;
1674                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1675                                 ctx->flags |= E2F_FLAG_ABORT;
1676                                 goto endit;
1677                         }
1678                         pb.ino = EXT2_BAD_INO;
1679                         pb.num_blocks = pb.last_block = 0;
1680                         pb.last_db_block = -1;
1681                         pb.num_illegal_blocks = 0;
1682                         pb.suppress = 0; pb.clear = 0; pb.is_dir = 0;
1683                         pb.is_reg = 0; pb.fragmented = 0; pb.bbcheck = 0;
1684                         pb.inode = inode;
1685                         pb.pctx = &pctx;
1686                         pb.ctx = ctx;
1687                         pctx.errcode = ext2fs_block_iterate3(fs, ino, 0,
1688                                      block_buf, process_bad_block, &pb);
1689                         ext2fs_free_block_bitmap(pb.fs_meta_blocks);
1690                         if (pctx.errcode) {
1691                                 fix_problem(ctx, PR_1_BLOCK_ITERATE, &pctx);
1692                                 ctx->flags |= E2F_FLAG_ABORT;
1693                                 goto endit;
1694                         }
1695                         if (pb.bbcheck)
1696                                 if (!fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK_PROMPT, &pctx)) {
1697                                 ctx->flags |= E2F_FLAG_ABORT;
1698                                 goto endit;
1699                         }
1700                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1701                         clear_problem_context(&pctx);
1702                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1703                         continue;
1704                 } else if (ino == EXT2_ROOT_INO) {
1705                         /*
1706                          * Make sure the root inode is a directory; if
1707                          * not, offer to clear it.  It will be
1708                          * regenerated in pass #3.
1709                          */
1710                         if (!LINUX_S_ISDIR(inode->i_mode)) {
1711                                 if (fix_problem(ctx, PR_1_ROOT_NO_DIR, &pctx))
1712                                         goto clear_inode;
1713                         }
1714                         /*
1715                          * If dtime is set, offer to clear it.  mke2fs
1716                          * version 0.2b created filesystems with the
1717                          * dtime field set for the root and lost+found
1718                          * directories.  We won't worry about
1719                          * /lost+found, since that can be regenerated
1720                          * easily.  But we will fix the root directory
1721                          * as a special case.
1722                          */
1723                         if (inode->i_dtime && inode->i_links_count) {
1724                                 if (fix_problem(ctx, PR_1_ROOT_DTIME, &pctx)) {
1725                                         inode->i_dtime = 0;
1726                                         e2fsck_write_inode(ctx, ino, inode,
1727                                                            "pass1");
1728                                         failed_csum = 0;
1729                                 }
1730                         }
1731                 } else if (ino == EXT2_JOURNAL_INO) {
1732                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1733                         if (fs->super->s_journal_inum == EXT2_JOURNAL_INO) {
1734                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1735                                     fix_problem(ctx, PR_1_JOURNAL_BAD_MODE,
1736                                                 &pctx)) {
1737                                         inode->i_mode = LINUX_S_IFREG;
1738                                         e2fsck_write_inode(ctx, ino, inode,
1739                                                            "pass1");
1740                                         failed_csum = 0;
1741                                 }
1742                                 check_blocks(ctx, &pctx, block_buf, NULL);
1743                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1744                                 continue;
1745                         }
1746                         if ((inode->i_links_count ||
1747                              inode->i_blocks || inode->i_block[0]) &&
1748                             fix_problem(ctx, PR_1_JOURNAL_INODE_NOT_CLEAR,
1749                                         &pctx)) {
1750                                 memset(inode, 0, inode_size);
1751                                 ext2fs_icount_store(ctx->inode_link_info,
1752                                                     ino, 0);
1753                                 e2fsck_write_inode_full(ctx, ino, inode,
1754                                                         inode_size, "pass1");
1755                                 failed_csum = 0;
1756                         }
1757                 } else if (quota_inum_is_reserved(fs, ino)) {
1758                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1759                         if (ext2fs_has_feature_quota(fs->super) &&
1760                             quota_inum_is_super(fs->super, ino)) {
1761                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1762                                     fix_problem(ctx, PR_1_QUOTA_BAD_MODE,
1763                                                         &pctx)) {
1764                                         inode->i_mode = LINUX_S_IFREG;
1765                                         e2fsck_write_inode(ctx, ino, inode,
1766                                                         "pass1");
1767                                         failed_csum = 0;
1768                                 }
1769                                 check_blocks(ctx, &pctx, block_buf, NULL);
1770                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1771                                 continue;
1772                         }
1773                         if ((inode->i_links_count ||
1774                              inode->i_blocks || inode->i_block[0]) &&
1775                             fix_problem(ctx, PR_1_QUOTA_INODE_NOT_CLEAR,
1776                                         &pctx)) {
1777                                 memset(inode, 0, inode_size);
1778                                 ext2fs_icount_store(ctx->inode_link_info,
1779                                                     ino, 0);
1780                                 e2fsck_write_inode_full(ctx, ino, inode,
1781                                                         inode_size, "pass1");
1782                                 failed_csum = 0;
1783                         }
1784                 } else if (ino < EXT2_FIRST_INODE(fs->super)) {
1785                         problem_t problem = 0;
1786
1787                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1788                         if (ino == EXT2_BOOT_LOADER_INO) {
1789                                 if (LINUX_S_ISDIR(inode->i_mode))
1790                                         problem = PR_1_RESERVED_BAD_MODE;
1791                         } else if (ino == EXT2_RESIZE_INO) {
1792                                 if (inode->i_mode &&
1793                                     !LINUX_S_ISREG(inode->i_mode))
1794                                         problem = PR_1_RESERVED_BAD_MODE;
1795                         } else {
1796                                 if (inode->i_mode != 0)
1797                                         problem = PR_1_RESERVED_BAD_MODE;
1798                         }
1799                         if (problem) {
1800                                 if (fix_problem(ctx, problem, &pctx)) {
1801                                         inode->i_mode = 0;
1802                                         e2fsck_write_inode(ctx, ino, inode,
1803                                                            "pass1");
1804                                         failed_csum = 0;
1805                                 }
1806                         }
1807                         check_blocks(ctx, &pctx, block_buf, NULL);
1808                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1809                         continue;
1810                 }
1811
1812                 if (!inode->i_links_count) {
1813                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1814                         continue;
1815                 }
1816                 /*
1817                  * n.b.  0.3c ext2fs code didn't clear i_links_count for
1818                  * deleted files.  Oops.
1819                  *
1820                  * Since all new ext2 implementations get this right,
1821                  * we now assume that the case of non-zero
1822                  * i_links_count and non-zero dtime means that we
1823                  * should keep the file, not delete it.
1824                  *
1825                  */
1826                 if (inode->i_dtime) {
1827                         if (fix_problem(ctx, PR_1_SET_DTIME, &pctx)) {
1828                                 inode->i_dtime = 0;
1829                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1830                                 failed_csum = 0;
1831                         }
1832                 }
1833
1834                 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1835                 switch (fs->super->s_creator_os) {
1836                     case EXT2_OS_HURD:
1837                         frag = inode->osd2.hurd2.h_i_frag;
1838                         fsize = inode->osd2.hurd2.h_i_fsize;
1839                         break;
1840                     default:
1841                         frag = fsize = 0;
1842                 }
1843
1844                 if (inode->i_faddr || frag || fsize ||
1845                     (!ext2fs_has_feature_largedir(fs->super) &&
1846                     (LINUX_S_ISDIR(inode->i_mode) && inode->i_size_high)))
1847                         mark_inode_bad(ctx, ino);
1848                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1849                     !ext2fs_has_feature_64bit(fs->super) &&
1850                     inode->osd2.linux2.l_i_file_acl_high != 0)
1851                         mark_inode_bad(ctx, ino);
1852                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1853                     !ext2fs_has_feature_huge_file(fs->super) &&
1854                     (inode->osd2.linux2.l_i_blocks_hi != 0))
1855                         mark_inode_bad(ctx, ino);
1856                 if (inode->i_flags & EXT2_IMAGIC_FL) {
1857                         if (imagic_fs) {
1858                                 if (!ctx->inode_imagic_map)
1859                                         alloc_imagic_map(ctx);
1860                                 ext2fs_mark_inode_bitmap2(ctx->inode_imagic_map,
1861                                                          ino);
1862                         } else {
1863                                 if (fix_problem(ctx, PR_1_SET_IMAGIC, &pctx)) {
1864                                         inode->i_flags &= ~EXT2_IMAGIC_FL;
1865                                         e2fsck_write_inode(ctx, ino,
1866                                                            inode, "pass1");
1867                                         failed_csum = 0;
1868                                 }
1869                         }
1870                 }
1871
1872                 check_inode_extra_space(ctx, &pctx, &ea_ibody_quota);
1873                 check_is_really_dir(ctx, &pctx, block_buf);
1874
1875                 /*
1876                  * ext2fs_inode_has_valid_blocks2 does not actually look
1877                  * at i_block[] values, so not endian-sensitive here.
1878                  */
1879                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL) &&
1880                     LINUX_S_ISLNK(inode->i_mode) &&
1881                     !ext2fs_inode_has_valid_blocks2(fs, inode) &&
1882                     fix_problem(ctx, PR_1_FAST_SYMLINK_EXTENT_FL, &pctx)) {
1883                         inode->i_flags &= ~EXT4_EXTENTS_FL;
1884                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1885                         failed_csum = 0;
1886                 }
1887
1888                 if ((inode->i_flags & EXT4_ENCRYPT_FL) &&
1889                     add_encrypted_file(ctx, &pctx) < 0)
1890                         goto clear_inode;
1891
1892                 if (casefold_fs && inode->i_flags & EXT4_CASEFOLD_FL)
1893                         ext2fs_mark_inode_bitmap2(ctx->inode_casefold_map, ino);
1894
1895                 if (LINUX_S_ISDIR(inode->i_mode)) {
1896                         ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
1897                         e2fsck_add_dir_info(ctx, ino, 0);
1898                         ctx->fs_directory_count++;
1899                         if (inode->i_flags & EXT4_CASEFOLD_FL)
1900                                 add_casefolded_dir(ctx, ino);
1901                 } else if (LINUX_S_ISREG (inode->i_mode)) {
1902                         ext2fs_mark_inode_bitmap2(ctx->inode_reg_map, ino);
1903                         ctx->fs_regular_count++;
1904                 } else if (LINUX_S_ISCHR (inode->i_mode) &&
1905                            e2fsck_pass1_check_device_inode(fs, inode)) {
1906                         check_extents_inlinedata(ctx, &pctx);
1907                         check_immutable(ctx, &pctx);
1908                         check_size(ctx, &pctx);
1909                         ctx->fs_chardev_count++;
1910                 } else if (LINUX_S_ISBLK (inode->i_mode) &&
1911                            e2fsck_pass1_check_device_inode(fs, inode)) {
1912                         check_extents_inlinedata(ctx, &pctx);
1913                         check_immutable(ctx, &pctx);
1914                         check_size(ctx, &pctx);
1915                         ctx->fs_blockdev_count++;
1916                 } else if (LINUX_S_ISLNK (inode->i_mode) &&
1917                            e2fsck_pass1_check_symlink(fs, ino, inode,
1918                                                       block_buf)) {
1919                         check_immutable(ctx, &pctx);
1920                         ctx->fs_symlinks_count++;
1921                         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
1922                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1923                                 continue;
1924                         } else if (ext2fs_is_fast_symlink(inode)) {
1925                                 ctx->fs_fast_symlinks_count++;
1926                                 check_blocks(ctx, &pctx, block_buf,
1927                                              &ea_ibody_quota);
1928                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1929                                 continue;
1930                         }
1931                 }
1932                 else if (LINUX_S_ISFIFO (inode->i_mode) &&
1933                          e2fsck_pass1_check_device_inode(fs, inode)) {
1934                         check_extents_inlinedata(ctx, &pctx);
1935                         check_immutable(ctx, &pctx);
1936                         check_size(ctx, &pctx);
1937                         ctx->fs_fifo_count++;
1938                 } else if ((LINUX_S_ISSOCK (inode->i_mode)) &&
1939                            e2fsck_pass1_check_device_inode(fs, inode)) {
1940                         check_extents_inlinedata(ctx, &pctx);
1941                         check_immutable(ctx, &pctx);
1942                         check_size(ctx, &pctx);
1943                         ctx->fs_sockets_count++;
1944                 } else
1945                         mark_inode_bad(ctx, ino);
1946                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1947                     !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
1948                         if (inode->i_block[EXT2_IND_BLOCK])
1949                                 ctx->fs_ind_count++;
1950                         if (inode->i_block[EXT2_DIND_BLOCK])
1951                                 ctx->fs_dind_count++;
1952                         if (inode->i_block[EXT2_TIND_BLOCK])
1953                                 ctx->fs_tind_count++;
1954                 }
1955                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1956                     !(inode->i_flags & EXT4_INLINE_DATA_FL) &&
1957                     (inode->i_block[EXT2_IND_BLOCK] ||
1958                      inode->i_block[EXT2_DIND_BLOCK] ||
1959                      inode->i_block[EXT2_TIND_BLOCK] ||
1960                      ext2fs_file_acl_block(fs, inode))) {
1961                         struct process_inode_block *itp;
1962
1963                         itp = &inodes_to_process[process_inode_count];
1964                         itp->ino = ino;
1965                         itp->ea_ibody_quota = ea_ibody_quota;
1966                         if (inode_size < sizeof(struct ext2_inode_large))
1967                                 memcpy(&itp->inode, inode, inode_size);
1968                         else
1969                                 memcpy(&itp->inode, inode, sizeof(itp->inode));
1970                         process_inode_count++;
1971                 } else
1972                         check_blocks(ctx, &pctx, block_buf, &ea_ibody_quota);
1973
1974                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1975
1976                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1977                         goto endit;
1978
1979                 if (process_inode_count >= ctx->process_inode_size) {
1980                         process_inodes(ctx, block_buf);
1981
1982                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1983                                 goto endit;
1984                 }
1985         }
1986         process_inodes(ctx, block_buf);
1987         ext2fs_close_inode_scan(scan);
1988         scan = NULL;
1989
1990         reserve_block_for_root_repair(ctx);
1991         reserve_block_for_lnf_repair(ctx);
1992
1993         /*
1994          * If any extended attribute blocks' reference counts need to
1995          * be adjusted, either up (ctx->refcount_extra), or down
1996          * (ctx->refcount), then fix them.
1997          */
1998         if (ctx->refcount) {
1999                 adjust_extattr_refcount(ctx, ctx->refcount, block_buf, -1);
2000                 ea_refcount_free(ctx->refcount);
2001                 ctx->refcount = 0;
2002         }
2003         if (ctx->refcount_extra) {
2004                 adjust_extattr_refcount(ctx, ctx->refcount_extra,
2005                                         block_buf, +1);
2006                 ea_refcount_free(ctx->refcount_extra);
2007                 ctx->refcount_extra = 0;
2008         }
2009
2010         if (ctx->ea_block_quota_blocks) {
2011                 ea_refcount_free(ctx->ea_block_quota_blocks);
2012                 ctx->ea_block_quota_blocks = 0;
2013         }
2014
2015         if (ctx->ea_block_quota_inodes) {
2016                 ea_refcount_free(ctx->ea_block_quota_inodes);
2017                 ctx->ea_block_quota_inodes = 0;
2018         }
2019
2020         if (ctx->invalid_bitmaps)
2021                 handle_fs_bad_blocks(ctx);
2022
2023         /* We don't need the block_ea_map any more */
2024         if (ctx->block_ea_map) {
2025                 ext2fs_free_block_bitmap(ctx->block_ea_map);
2026                 ctx->block_ea_map = 0;
2027         }
2028
2029         /* We don't need the encryption policy => ID map any more */
2030         destroy_encryption_policy_map(ctx);
2031
2032         if (ctx->flags & E2F_FLAG_RESIZE_INODE) {
2033                 clear_problem_context(&pctx);
2034                 pctx.errcode = ext2fs_create_resize_inode(fs);
2035                 if (pctx.errcode) {
2036                         if (!fix_problem(ctx, PR_1_RESIZE_INODE_CREATE,
2037                                          &pctx)) {
2038                                 ctx->flags |= E2F_FLAG_ABORT;
2039                                 goto endit;
2040                         }
2041                         pctx.errcode = 0;
2042                 }
2043                 if (!pctx.errcode) {
2044                         e2fsck_read_inode(ctx, EXT2_RESIZE_INO, inode,
2045                                           "recreate inode");
2046                         inode->i_mtime = ctx->now;
2047                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, inode,
2048                                            "recreate inode");
2049                 }
2050                 ctx->flags &= ~E2F_FLAG_RESIZE_INODE;
2051         }
2052
2053         if (ctx->flags & E2F_FLAG_RESTART) {
2054                 /*
2055                  * Only the master copy of the superblock and block
2056                  * group descriptors are going to be written during a
2057                  * restart, so set the superblock to be used to be the
2058                  * master superblock.
2059                  */
2060                 ctx->use_superblock = 0;
2061                 goto endit;
2062         }
2063
2064         if (ctx->large_dirs && !ext2fs_has_feature_largedir(fs->super)) {
2065                 if (fix_problem(ctx, PR_2_FEATURE_LARGE_DIRS, &pctx)) {
2066                         ext2fs_set_feature_largedir(fs->super);
2067                         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2068                         ext2fs_mark_super_dirty(fs);
2069                 }
2070                 if (fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
2071                     fix_problem(ctx, PR_1_FS_REV_LEVEL, &pctx)) {
2072                         ext2fs_update_dynamic_rev(fs);
2073                         ext2fs_mark_super_dirty(fs);
2074                 }
2075         }
2076
2077         if (ctx->block_dup_map) {
2078                 if (ctx->options & E2F_OPT_PREEN) {
2079                         clear_problem_context(&pctx);
2080                         fix_problem(ctx, PR_1_DUP_BLOCKS_PREENSTOP, &pctx);
2081                 }
2082                 e2fsck_pass1_dupblocks(ctx, block_buf);
2083         }
2084         ctx->flags |= E2F_FLAG_ALLOC_OK;
2085 endit:
2086         e2fsck_use_inode_shortcuts(ctx, 0);
2087         ext2fs_free_mem(&inodes_to_process);
2088         inodes_to_process = 0;
2089
2090         if (scan)
2091                 ext2fs_close_inode_scan(scan);
2092         if (block_buf)
2093                 ext2fs_free_mem(&block_buf);
2094         if (inode)
2095                 ext2fs_free_mem(&inode);
2096
2097         /*
2098          * The l+f inode may have been cleared, so zap it now and
2099          * later passes will recalculate it if necessary
2100          */
2101         ctx->lost_and_found = 0;
2102
2103         if ((ctx->flags & E2F_FLAG_SIGNAL_MASK) == 0)
2104                 print_resource_track(ctx, _("Pass 1"), &rtrack, ctx->fs->io);
2105         else
2106                 ctx->invalid_bitmaps++;
2107 }
2108 #undef FINISH_INODE_LOOP
2109
2110 /*
2111  * When the inode_scan routines call this callback at the end of the
2112  * glock group, call process_inodes.
2113  */
2114 static errcode_t scan_callback(ext2_filsys fs,
2115                                ext2_inode_scan scan EXT2FS_ATTR((unused)),
2116                                dgrp_t group, void * priv_data)
2117 {
2118         struct scan_callback_struct *scan_struct;
2119         e2fsck_t ctx;
2120
2121         scan_struct = (struct scan_callback_struct *) priv_data;
2122         ctx = scan_struct->ctx;
2123
2124         process_inodes((e2fsck_t) fs->priv_data, scan_struct->block_buf);
2125
2126         if (ctx->progress)
2127                 if ((ctx->progress)(ctx, 1, group+1,
2128                                     ctx->fs->group_desc_count))
2129                         return EXT2_ET_CANCEL_REQUESTED;
2130
2131         return 0;
2132 }
2133
2134 /*
2135  * Process the inodes in the "inodes to process" list.
2136  */
2137 static void process_inodes(e2fsck_t ctx, char *block_buf)
2138 {
2139         int                     i;
2140         struct ext2_inode       *old_stashed_inode;
2141         ext2_ino_t              old_stashed_ino;
2142         const char              *old_operation;
2143         char                    buf[80];
2144         struct problem_context  pctx;
2145
2146 #if 0
2147         printf("begin process_inodes: ");
2148 #endif
2149         if (process_inode_count == 0)
2150                 return;
2151         old_operation = ehandler_operation(0);
2152         old_stashed_inode = ctx->stashed_inode;
2153         old_stashed_ino = ctx->stashed_ino;
2154         qsort(inodes_to_process, process_inode_count,
2155                       sizeof(struct process_inode_block), process_inode_cmp);
2156         clear_problem_context(&pctx);
2157         for (i=0; i < process_inode_count; i++) {
2158                 pctx.inode = ctx->stashed_inode =
2159                         (struct ext2_inode *) &inodes_to_process[i].inode;
2160                 pctx.ino = ctx->stashed_ino = inodes_to_process[i].ino;
2161
2162 #if 0
2163                 printf("%u ", pctx.ino);
2164 #endif
2165                 sprintf(buf, _("reading indirect blocks of inode %u"),
2166                         pctx.ino);
2167                 ehandler_operation(buf);
2168                 check_blocks(ctx, &pctx, block_buf,
2169                              &inodes_to_process[i].ea_ibody_quota);
2170                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2171                         break;
2172         }
2173         ctx->stashed_inode = old_stashed_inode;
2174         ctx->stashed_ino = old_stashed_ino;
2175         process_inode_count = 0;
2176 #if 0
2177         printf("end process inodes\n");
2178 #endif
2179         ehandler_operation(old_operation);
2180 }
2181
2182 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b)
2183 {
2184         const struct process_inode_block *ib_a =
2185                 (const struct process_inode_block *) a;
2186         const struct process_inode_block *ib_b =
2187                 (const struct process_inode_block *) b;
2188         int     ret;
2189
2190         ret = (ib_a->inode.i_block[EXT2_IND_BLOCK] -
2191                ib_b->inode.i_block[EXT2_IND_BLOCK]);
2192         if (ret == 0)
2193                 /*
2194                  * We only call process_inodes() for non-extent
2195                  * inodes, so it's OK to pass NULL to
2196                  * ext2fs_file_acl_block() here.
2197                  */
2198                 ret = ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_a->inode)) -
2199                         ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_b->inode));
2200         if (ret == 0)
2201                 ret = ib_a->ino - ib_b->ino;
2202         return ret;
2203 }
2204
2205 /*
2206  * Mark an inode as being bad in some what
2207  */
2208 static void mark_inode_bad(e2fsck_t ctx, ino_t ino)
2209 {
2210         struct          problem_context pctx;
2211
2212         if (!ctx->inode_bad_map) {
2213                 clear_problem_context(&pctx);
2214
2215                 pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2216                                 _("bad inode map"), EXT2FS_BMAP64_RBTREE,
2217                                 "inode_bad_map", &ctx->inode_bad_map);
2218                 if (pctx.errcode) {
2219                         pctx.num = 3;
2220                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2221                         /* Should never get here */
2222                         ctx->flags |= E2F_FLAG_ABORT;
2223                         return;
2224                 }
2225         }
2226         ext2fs_mark_inode_bitmap2(ctx->inode_bad_map, ino);
2227 }
2228
2229 static void add_casefolded_dir(e2fsck_t ctx, ino_t ino)
2230 {
2231         struct          problem_context pctx;
2232
2233         if (!ctx->casefolded_dirs) {
2234                 pctx.errcode = ext2fs_u32_list_create(&ctx->casefolded_dirs, 0);
2235                 if (pctx.errcode)
2236                         goto error;
2237         }
2238         pctx.errcode = ext2fs_u32_list_add(ctx->casefolded_dirs, ino);
2239         if (pctx.errcode == 0)
2240                 return;
2241 error:
2242         fix_problem(ctx, PR_1_ALLOCATE_CASEFOLDED_DIRLIST, &pctx);
2243         /* Should never get here */
2244         ctx->flags |= E2F_FLAG_ABORT;
2245 }
2246
2247 /*
2248  * This procedure will allocate the inode "bb" (badblock) map table
2249  */
2250 static void alloc_bb_map(e2fsck_t ctx)
2251 {
2252         struct          problem_context pctx;
2253
2254         clear_problem_context(&pctx);
2255         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2256                         _("inode in bad block map"), EXT2FS_BMAP64_RBTREE,
2257                         "inode_bb_map", &ctx->inode_bb_map);
2258         if (pctx.errcode) {
2259                 pctx.num = 4;
2260                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2261                 /* Should never get here */
2262                 ctx->flags |= E2F_FLAG_ABORT;
2263                 return;
2264         }
2265 }
2266
2267 /*
2268  * This procedure will allocate the inode imagic table
2269  */
2270 static void alloc_imagic_map(e2fsck_t ctx)
2271 {
2272         struct          problem_context pctx;
2273
2274         clear_problem_context(&pctx);
2275         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2276                         _("imagic inode map"), EXT2FS_BMAP64_RBTREE,
2277                         "inode_imagic_map", &ctx->inode_imagic_map);
2278         if (pctx.errcode) {
2279                 pctx.num = 5;
2280                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2281                 /* Should never get here */
2282                 ctx->flags |= E2F_FLAG_ABORT;
2283                 return;
2284         }
2285 }
2286
2287 /*
2288  * Marks a block as in use, setting the dup_map if it's been set
2289  * already.  Called by process_block and process_bad_block.
2290  *
2291  * WARNING: Assumes checks have already been done to make sure block
2292  * is valid.  This is true in both process_block and process_bad_block.
2293  */
2294 static _INLINE_ void mark_block_used(e2fsck_t ctx, blk64_t block)
2295 {
2296         struct          problem_context pctx;
2297
2298         clear_problem_context(&pctx);
2299
2300         if (ext2fs_fast_test_block_bitmap2(ctx->block_found_map, block)) {
2301                 if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2302                     !(ctx->options & E2F_OPT_UNSHARE_BLOCKS)) {
2303                         return;
2304                 }
2305                 if (!ctx->block_dup_map) {
2306                         pctx.errcode = e2fsck_allocate_block_bitmap(ctx->fs,
2307                                         _("multiply claimed block map"),
2308                                         EXT2FS_BMAP64_RBTREE, "block_dup_map",
2309                                         &ctx->block_dup_map);
2310                         if (pctx.errcode) {
2311                                 pctx.num = 3;
2312                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR,
2313                                             &pctx);
2314                                 /* Should never get here */
2315                                 ctx->flags |= E2F_FLAG_ABORT;
2316                                 return;
2317                         }
2318                 }
2319                 ext2fs_fast_mark_block_bitmap2(ctx->block_dup_map, block);
2320         } else {
2321                 ext2fs_fast_mark_block_bitmap2(ctx->block_found_map, block);
2322         }
2323 }
2324
2325 /*
2326  * When cluster size is greater than one block, it is caller's responsibility
2327  * to make sure block parameter starts at a cluster boundary.
2328  */
2329 static _INLINE_ void mark_blocks_used(e2fsck_t ctx, blk64_t block,
2330                                       unsigned int num)
2331 {
2332         if (ext2fs_test_block_bitmap_range2(ctx->block_found_map, block, num))
2333                 ext2fs_mark_block_bitmap_range2(ctx->block_found_map, block, num);
2334         else {
2335                 unsigned int i;
2336
2337                 for (i = 0; i < num; i += EXT2FS_CLUSTER_RATIO(ctx->fs))
2338                         mark_block_used(ctx, block + i);
2339         }
2340 }
2341
2342 /*
2343  * Adjust the extended attribute block's reference counts at the end
2344  * of pass 1, either by subtracting out references for EA blocks that
2345  * are still referenced in ctx->refcount, or by adding references for
2346  * EA blocks that had extra references as accounted for in
2347  * ctx->refcount_extra.
2348  */
2349 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
2350                                     char *block_buf, int adjust_sign)
2351 {
2352         struct ext2_ext_attr_header     *header;
2353         struct problem_context          pctx;
2354         ext2_filsys                     fs = ctx->fs;
2355         blk64_t                         blk;
2356         __u32                           should_be;
2357         ea_value_t                      count;
2358
2359         clear_problem_context(&pctx);
2360
2361         ea_refcount_intr_begin(refcount);
2362         while (1) {
2363                 if ((blk = ea_refcount_intr_next(refcount, &count)) == 0)
2364                         break;
2365                 pctx.blk = blk;
2366                 pctx.errcode = ext2fs_read_ext_attr3(fs, blk, block_buf,
2367                                                      pctx.ino);
2368                 if (pctx.errcode) {
2369                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
2370                         return;
2371                 }
2372                 header = (struct ext2_ext_attr_header *) block_buf;
2373                 pctx.blkcount = header->h_refcount;
2374                 should_be = header->h_refcount + adjust_sign * (int)count;
2375                 pctx.num = should_be;
2376                 if (fix_problem(ctx, PR_1_EXTATTR_REFCOUNT, &pctx)) {
2377                         header->h_refcount = should_be;
2378                         pctx.errcode = ext2fs_write_ext_attr3(fs, blk,
2379                                                              block_buf,
2380                                                              pctx.ino);
2381                         if (pctx.errcode) {
2382                                 fix_problem(ctx, PR_1_EXTATTR_WRITE_ABORT,
2383                                             &pctx);
2384                                 continue;
2385                         }
2386                 }
2387         }
2388 }
2389
2390 /*
2391  * Handle processing the extended attribute blocks
2392  */
2393 static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx,
2394                            char *block_buf, struct ea_quota *ea_block_quota)
2395 {
2396         ext2_filsys fs = ctx->fs;
2397         ext2_ino_t      ino = pctx->ino;
2398         struct ext2_inode *inode = pctx->inode;
2399         blk64_t         blk;
2400         char *          end;
2401         struct ext2_ext_attr_header *header;
2402         struct ext2_ext_attr_entry *first, *entry;
2403         blk64_t         quota_blocks = EXT2FS_C2B(fs, 1);
2404         __u64           quota_inodes = 0;
2405         region_t        region = 0;
2406         int             failed_csum = 0;
2407
2408         ea_block_quota->blocks = 0;
2409         ea_block_quota->inodes = 0;
2410
2411         blk = ext2fs_file_acl_block(fs, inode);
2412         if (blk == 0)
2413                 return 0;
2414
2415         /*
2416          * If the Extended attribute flag isn't set, then a non-zero
2417          * file acl means that the inode is corrupted.
2418          *
2419          * Or if the extended attribute block is an invalid block,
2420          * then the inode is also corrupted.
2421          */
2422         if (!ext2fs_has_feature_xattr(fs->super) ||
2423             (blk < fs->super->s_first_data_block) ||
2424             (blk >= ext2fs_blocks_count(fs->super))) {
2425                 mark_inode_bad(ctx, ino);
2426                 return 0;
2427         }
2428
2429         /* If ea bitmap hasn't been allocated, create it */
2430         if (!ctx->block_ea_map) {
2431                 pctx->errcode = e2fsck_allocate_block_bitmap(fs,
2432                                         _("ext attr block map"),
2433                                         EXT2FS_BMAP64_RBTREE, "block_ea_map",
2434                                         &ctx->block_ea_map);
2435                 if (pctx->errcode) {
2436                         pctx->num = 2;
2437                         fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, pctx);
2438                         ctx->flags |= E2F_FLAG_ABORT;
2439                         return 0;
2440                 }
2441         }
2442
2443         /* Create the EA refcount structure if necessary */
2444         if (!ctx->refcount) {
2445                 pctx->errcode = ea_refcount_create(0, &ctx->refcount);
2446                 if (pctx->errcode) {
2447                         pctx->num = 1;
2448                         fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2449                         ctx->flags |= E2F_FLAG_ABORT;
2450                         return 0;
2451                 }
2452         }
2453
2454 #if 0
2455         /* Debugging text */
2456         printf("Inode %u has EA block %u\n", ino, blk);
2457 #endif
2458
2459         /* Have we seen this EA block before? */
2460         if (ext2fs_fast_test_block_bitmap2(ctx->block_ea_map, blk)) {
2461                 ea_block_quota->blocks = EXT2FS_C2B(fs, 1);
2462                 ea_block_quota->inodes = 0;
2463
2464                 if (ctx->ea_block_quota_blocks) {
2465                         ea_refcount_fetch(ctx->ea_block_quota_blocks, blk,
2466                                           &quota_blocks);
2467                         if (quota_blocks)
2468                                 ea_block_quota->blocks = quota_blocks;
2469                 }
2470
2471                 if (ctx->ea_block_quota_inodes)
2472                         ea_refcount_fetch(ctx->ea_block_quota_inodes, blk,
2473                                           &ea_block_quota->inodes);
2474
2475                 if (ea_refcount_decrement(ctx->refcount, blk, 0) == 0)
2476                         return 1;
2477                 /* Ooops, this EA was referenced more than it stated */
2478                 if (!ctx->refcount_extra) {
2479                         pctx->errcode = ea_refcount_create(0,
2480                                            &ctx->refcount_extra);
2481                         if (pctx->errcode) {
2482                                 pctx->num = 2;
2483                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2484                                 ctx->flags |= E2F_FLAG_ABORT;
2485                                 return 0;
2486                         }
2487                 }
2488                 ea_refcount_increment(ctx->refcount_extra, blk, 0);
2489                 return 1;
2490         }
2491
2492         /*
2493          * OK, we haven't seen this EA block yet.  So we need to
2494          * validate it
2495          */
2496         pctx->blk = blk;
2497         pctx->errcode = ext2fs_read_ext_attr3(fs, blk, block_buf, pctx->ino);
2498         if (pctx->errcode == EXT2_ET_EXT_ATTR_CSUM_INVALID) {
2499                 pctx->errcode = 0;
2500                 failed_csum = 1;
2501         } else if (pctx->errcode == EXT2_ET_BAD_EA_HEADER)
2502                 pctx->errcode = 0;
2503
2504         if (pctx->errcode &&
2505             fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx)) {
2506                 pctx->errcode = 0;
2507                 goto clear_extattr;
2508         }
2509         header = (struct ext2_ext_attr_header *) block_buf;
2510         pctx->blk = ext2fs_file_acl_block(fs, inode);
2511         if (((ctx->ext_attr_ver == 1) &&
2512              (header->h_magic != EXT2_EXT_ATTR_MAGIC_v1)) ||
2513             ((ctx->ext_attr_ver == 2) &&
2514              (header->h_magic != EXT2_EXT_ATTR_MAGIC))) {
2515                 if (fix_problem(ctx, PR_1_BAD_EA_BLOCK, pctx))
2516                         goto clear_extattr;
2517         }
2518
2519         if (header->h_blocks != 1) {
2520                 if (fix_problem(ctx, PR_1_EA_MULTI_BLOCK, pctx))
2521                         goto clear_extattr;
2522         }
2523
2524         if (pctx->errcode && fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx))
2525                 goto clear_extattr;
2526
2527         region = region_create(0, fs->blocksize);
2528         if (!region) {
2529                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
2530                 ctx->flags |= E2F_FLAG_ABORT;
2531                 return 0;
2532         }
2533         if (region_allocate(region, 0, sizeof(struct ext2_ext_attr_header))) {
2534                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2535                         goto clear_extattr;
2536         }
2537
2538         first = (struct ext2_ext_attr_entry *)(header+1);
2539         end = block_buf + fs->blocksize;
2540         entry = first;
2541         while ((char *)entry < end && *(__u32 *)entry) {
2542                 __u32 hash;
2543
2544                 if (region_allocate(region, (char *)entry - (char *)header,
2545                                    EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
2546                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2547                                 goto clear_extattr;
2548                         break;
2549                 }
2550                 if ((ctx->ext_attr_ver == 1 &&
2551                      (entry->e_name_len == 0 || entry->e_name_index != 0)) ||
2552                     (ctx->ext_attr_ver == 2 &&
2553                      entry->e_name_index == 0)) {
2554                         if (fix_problem(ctx, PR_1_EA_BAD_NAME, pctx))
2555                                 goto clear_extattr;
2556                         break;
2557                 }
2558                 if (entry->e_value_inum == 0) {
2559                         if (entry->e_value_size > EXT2_XATTR_SIZE_MAX ||
2560                             (entry->e_value_offs + entry->e_value_size >
2561                              fs->blocksize)) {
2562                                 if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2563                                         goto clear_extattr;
2564                                 break;
2565                         }
2566                         if (entry->e_value_size &&
2567                             region_allocate(region, entry->e_value_offs,
2568                                             EXT2_EXT_ATTR_SIZE(entry->e_value_size))) {
2569                                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION,
2570                                                 pctx))
2571                                         goto clear_extattr;
2572                         }
2573
2574                         hash = ext2fs_ext_attr_hash_entry(entry, block_buf +
2575                                                           entry->e_value_offs);
2576
2577                         if (entry->e_hash != hash) {
2578                                 pctx->num = entry->e_hash;
2579                                 if (fix_problem(ctx, PR_1_ATTR_HASH, pctx))
2580                                         goto clear_extattr;
2581                                 entry->e_hash = hash;
2582                         }
2583                 } else {
2584                         problem_t problem;
2585                         blk64_t entry_quota_blocks;
2586
2587                         problem = check_large_ea_inode(ctx, entry, pctx,
2588                                                        &entry_quota_blocks);
2589                         if (problem && fix_problem(ctx, problem, pctx))
2590                                 goto clear_extattr;
2591
2592                         quota_blocks += entry_quota_blocks;
2593                         quota_inodes++;
2594                 }
2595
2596                 entry = EXT2_EXT_ATTR_NEXT(entry);
2597         }
2598         if (region_allocate(region, (char *)entry - (char *)header, 4)) {
2599                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2600                         goto clear_extattr;
2601         }
2602         region_free(region);
2603
2604         /*
2605          * We only get here if there was no other errors that were fixed.
2606          * If there was a checksum fail, ask to correct it.
2607          */
2608         if (failed_csum &&
2609             fix_problem(ctx, PR_1_EA_BLOCK_ONLY_CSUM_INVALID, pctx)) {
2610                 pctx->errcode = ext2fs_write_ext_attr3(fs, blk, block_buf,
2611                                                        pctx->ino);
2612                 if (pctx->errcode)
2613                         return 0;
2614         }
2615
2616         if (quota_blocks != EXT2FS_C2B(fs, 1U)) {
2617                 if (!ctx->ea_block_quota_blocks) {
2618                         pctx->errcode = ea_refcount_create(0,
2619                                                 &ctx->ea_block_quota_blocks);
2620                         if (pctx->errcode) {
2621                                 pctx->num = 3;
2622                                 goto refcount_fail;
2623                         }
2624                 }
2625                 ea_refcount_store(ctx->ea_block_quota_blocks, blk,
2626                                   quota_blocks);
2627         }
2628
2629         if (quota_inodes) {
2630                 if (!ctx->ea_block_quota_inodes) {
2631                         pctx->errcode = ea_refcount_create(0,
2632                                                 &ctx->ea_block_quota_inodes);
2633                         if (pctx->errcode) {
2634                                 pctx->num = 4;
2635 refcount_fail:
2636                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2637                                 ctx->flags |= E2F_FLAG_ABORT;
2638                                 return 0;
2639                         }
2640                 }
2641
2642                 ea_refcount_store(ctx->ea_block_quota_inodes, blk,
2643                                   quota_inodes);
2644         }
2645         ea_block_quota->blocks = quota_blocks;
2646         ea_block_quota->inodes = quota_inodes;
2647
2648         inc_ea_inode_refs(ctx, pctx, first, end);
2649         ea_refcount_store(ctx->refcount, blk, header->h_refcount - 1);
2650         mark_block_used(ctx, blk);
2651         ext2fs_fast_mark_block_bitmap2(ctx->block_ea_map, blk);
2652         return 1;
2653
2654 clear_extattr:
2655         if (region)
2656                 region_free(region);
2657         ext2fs_file_acl_block_set(fs, inode, 0);
2658         e2fsck_write_inode(ctx, ino, inode, "check_ext_attr");
2659         return 0;
2660 }
2661
2662 /* Returns 1 if bad htree, 0 if OK */
2663 static int handle_htree(e2fsck_t ctx, struct problem_context *pctx,
2664                         ext2_ino_t ino, struct ext2_inode *inode,
2665                         char *block_buf)
2666 {
2667         struct ext2_dx_root_info        *root;
2668         ext2_filsys                     fs = ctx->fs;
2669         errcode_t                       retval;
2670         blk64_t                         blk;
2671
2672         if ((!LINUX_S_ISDIR(inode->i_mode) &&
2673              fix_problem(ctx, PR_1_HTREE_NODIR, pctx)) ||
2674             (!ext2fs_has_feature_dir_index(fs->super) &&
2675              fix_problem(ctx, PR_1_HTREE_SET, pctx)))
2676                 return 1;
2677
2678         pctx->errcode = ext2fs_bmap2(fs, ino, inode, 0, 0, 0, 0, &blk);
2679
2680         if ((pctx->errcode) ||
2681             (blk == 0) ||
2682             (blk < fs->super->s_first_data_block) ||
2683             (blk >= ext2fs_blocks_count(fs->super))) {
2684                 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2685                         return 1;
2686                 else
2687                         return 0;
2688         }
2689
2690         retval = io_channel_read_blk64(fs->io, blk, 1, block_buf);
2691         if (retval && fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2692                 return 1;
2693
2694         /* XXX should check that beginning matches a directory */
2695         root = (struct ext2_dx_root_info *) (block_buf + 24);
2696
2697         if ((root->reserved_zero || root->info_length < 8) &&
2698             fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2699                 return 1;
2700
2701         pctx->num = root->hash_version;
2702         if ((root->hash_version != EXT2_HASH_LEGACY) &&
2703             (root->hash_version != EXT2_HASH_HALF_MD4) &&
2704             (root->hash_version != EXT2_HASH_TEA) &&
2705             (root->hash_version != EXT2_HASH_SIPHASH) &&
2706             fix_problem(ctx, PR_1_HTREE_HASHV, pctx))
2707                 return 1;
2708
2709         if (ext4_hash_in_dirent(inode)) {
2710                 if (root->hash_version != EXT2_HASH_SIPHASH &&
2711                     fix_problem(ctx, PR_1_HTREE_NEEDS_SIPHASH, pctx))
2712                         return 1;
2713         } else {
2714                 if (root->hash_version == EXT2_HASH_SIPHASH &&
2715                    fix_problem(ctx, PR_1_HTREE_CANNOT_SIPHASH, pctx))
2716                         return 1;
2717         }
2718
2719         if ((root->unused_flags & EXT2_HASH_FLAG_INCOMPAT) &&
2720             fix_problem(ctx, PR_1_HTREE_INCOMPAT, pctx))
2721                 return 1;
2722
2723         pctx->num = root->indirect_levels;
2724         /* if htree level is clearly too high, consider it to be broken */
2725         if (root->indirect_levels > EXT4_HTREE_LEVEL &&
2726             fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2727                 return 1;
2728
2729         /* if level is only maybe too high, LARGE_DIR feature could be unset */
2730         if (root->indirect_levels > ext2_dir_htree_level(fs) &&
2731             !ext2fs_has_feature_largedir(fs->super)) {
2732                 int blockbits = EXT2_BLOCK_SIZE_BITS(fs->super) + 10;
2733                 unsigned idx_pb = 1 << (blockbits - 3);
2734
2735                 /* compare inode size/blocks vs. max-sized 2-level htree */
2736                 if (EXT2_I_SIZE(pctx->inode) <
2737                     (idx_pb - 1) * (idx_pb - 2) << blockbits &&
2738                     pctx->inode->i_blocks <
2739                     (idx_pb - 1) * (idx_pb - 2) << (blockbits - 9) &&
2740                     fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2741                         return 1;
2742         }
2743
2744         if (root->indirect_levels > EXT4_HTREE_LEVEL_COMPAT ||
2745             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
2746                 ctx->large_dirs++;
2747
2748         return 0;
2749 }
2750
2751 void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino,
2752                         struct ext2_inode *inode, int restart_flag,
2753                         const char *source)
2754 {
2755         inode->i_flags = 0;
2756         inode->i_links_count = 0;
2757         ext2fs_icount_store(ctx->inode_link_info, ino, 0);
2758         inode->i_dtime = ctx->now;
2759
2760         /*
2761          * If a special inode has such rotten block mappings that we
2762          * want to clear the whole inode, be sure to actually zap
2763          * the block maps because i_links_count isn't checked for
2764          * special inodes, and we'll end up right back here the next
2765          * time we run fsck.
2766          */
2767         if (ino < EXT2_FIRST_INODE(ctx->fs->super))
2768                 memset(inode->i_block, 0, sizeof(inode->i_block));
2769
2770         ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
2771         ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
2772         if (ctx->inode_reg_map)
2773                 ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
2774         if (ctx->inode_bad_map)
2775                 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
2776
2777         /*
2778          * If the inode was partially accounted for before processing
2779          * was aborted, we need to restart the pass 1 scan.
2780          */
2781         ctx->flags |= restart_flag;
2782
2783         if (ino == EXT2_BAD_INO)
2784                 memset(inode, 0, sizeof(struct ext2_inode));
2785
2786         e2fsck_write_inode(ctx, ino, inode, source);
2787 }
2788
2789 /*
2790  * Use the multiple-blocks reclamation code to fix alignment problems in
2791  * a bigalloc filesystem.  We want a logical cluster to map to *only* one
2792  * physical cluster, and we want the block offsets within that cluster to
2793  * line up.
2794  */
2795 static int has_unaligned_cluster_map(e2fsck_t ctx,
2796                                      blk64_t last_pblk, blk64_t last_lblk,
2797                                      blk64_t pblk, blk64_t lblk)
2798 {
2799         blk64_t cluster_mask;
2800
2801         if (!ctx->fs->cluster_ratio_bits)
2802                 return 0;
2803         cluster_mask = EXT2FS_CLUSTER_MASK(ctx->fs);
2804
2805         /*
2806          * If the block in the logical cluster doesn't align with the block in
2807          * the physical cluster...
2808          */
2809         if ((lblk & cluster_mask) != (pblk & cluster_mask))
2810                 return 1;
2811
2812         /*
2813          * If we cross a physical cluster boundary within a logical cluster...
2814          */
2815         if (last_pblk && (lblk & cluster_mask) != 0 &&
2816             EXT2FS_B2C(ctx->fs, lblk) == EXT2FS_B2C(ctx->fs, last_lblk) &&
2817             EXT2FS_B2C(ctx->fs, pblk) != EXT2FS_B2C(ctx->fs, last_pblk))
2818                 return 1;
2819
2820         return 0;
2821 }
2822
2823 static void scan_extent_node(e2fsck_t ctx, struct problem_context *pctx,
2824                              struct process_block_struct *pb,
2825                              blk64_t start_block, blk64_t end_block,
2826                              blk64_t eof_block,
2827                              ext2_extent_handle_t ehandle,
2828                              int try_repairs)
2829 {
2830         struct ext2fs_extent    extent;
2831         blk64_t                 blk, last_lblk;
2832         unsigned int            i, n;
2833         int                     is_dir, is_leaf;
2834         problem_t               problem;
2835         struct ext2_extent_info info;
2836         int                     failed_csum = 0;
2837
2838         if (pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID)
2839                 failed_csum = 1;
2840
2841         pctx->errcode = ext2fs_extent_get_info(ehandle, &info);
2842         if (pctx->errcode)
2843                 return;
2844         if (!(ctx->options & E2F_OPT_FIXES_ONLY) &&
2845             !pb->eti.force_rebuild &&
2846             info.curr_level < MAX_EXTENT_DEPTH_COUNT) {
2847                 struct extent_tree_level *etl;
2848
2849                 etl = pb->eti.ext_info + info.curr_level;
2850                 etl->num_extents += info.num_entries;
2851                 etl->max_extents += info.max_entries;
2852                 /*
2853                  * Implementation wart: Splitting extent blocks when appending
2854                  * will leave the old block with one free entry.  Therefore
2855                  * unless the node is totally full, pretend that a non-root
2856                  * extent block can hold one fewer entry than it actually does,
2857                  * so that we don't repeatedly rebuild the extent tree.
2858                  */
2859                 if (info.curr_level && info.num_entries < info.max_entries)
2860                         etl->max_extents--;
2861         }
2862
2863         pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_FIRST_SIB,
2864                                           &extent);
2865         while ((pctx->errcode == 0 ||
2866                 pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID) &&
2867                info.num_entries-- > 0) {
2868                 is_leaf = extent.e_flags & EXT2_EXTENT_FLAGS_LEAF;
2869                 is_dir = LINUX_S_ISDIR(pctx->inode->i_mode);
2870                 last_lblk = extent.e_lblk + extent.e_len - 1;
2871
2872                 problem = 0;
2873                 pctx->blk = extent.e_pblk;
2874                 pctx->blk2 = extent.e_lblk;
2875                 pctx->num = extent.e_len;
2876                 pctx->blkcount = extent.e_lblk + extent.e_len;
2877
2878                 if (extent.e_pblk == 0 ||
2879                     extent.e_pblk < ctx->fs->super->s_first_data_block ||
2880                     extent.e_pblk >= ext2fs_blocks_count(ctx->fs->super))
2881                         problem = PR_1_EXTENT_BAD_START_BLK;
2882                 else if (extent.e_lblk < start_block)
2883                         problem = PR_1_OUT_OF_ORDER_EXTENTS;
2884                 else if ((end_block && last_lblk > end_block) &&
2885                          !(last_lblk > eof_block &&
2886                            ((extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) ||
2887                             (pctx->inode->i_flags & EXT4_VERITY_FL))))
2888                         problem = PR_1_EXTENT_END_OUT_OF_BOUNDS;
2889                 else if (is_leaf && extent.e_len == 0)
2890                         problem = PR_1_EXTENT_LENGTH_ZERO;
2891                 else if (is_leaf &&
2892                          (extent.e_pblk + extent.e_len) >
2893                          ext2fs_blocks_count(ctx->fs->super))
2894                         problem = PR_1_EXTENT_ENDS_BEYOND;
2895                 else if (is_leaf && is_dir && !pctx->inode->i_size_high &&
2896                          !ext2fs_has_feature_largedir(ctx->fs->super) &&
2897                          ((extent.e_lblk + extent.e_len) >
2898                           (1U << (21 - ctx->fs->super->s_log_block_size))))
2899                         problem = PR_1_TOOBIG_DIR;
2900
2901                 if (is_leaf && problem == 0 && extent.e_len > 0) {
2902 #if 0
2903                         printf("extent_region(ino=%u, expect=%llu, "
2904                                "lblk=%llu, len=%u)\n", pb->ino,
2905                                (unsigned long long) pb->next_lblock,
2906                                (unsigned long long) extent.e_lblk,
2907                                extent.e_len);
2908 #endif
2909                         if (extent.e_lblk < pb->next_lblock)
2910                                 problem = PR_1_EXTENT_COLLISION;
2911                         else if (extent.e_lblk + extent.e_len > pb->next_lblock)
2912                                 pb->next_lblock = extent.e_lblk + extent.e_len;
2913                 }
2914
2915                 /*
2916                  * Uninitialized blocks in a directory?  Clear the flag and
2917                  * we'll interpret the blocks later.
2918                  */
2919                 if (try_repairs && is_dir && problem == 0 &&
2920                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
2921                     fix_problem(ctx, PR_1_UNINIT_DBLOCK, pctx)) {
2922                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
2923                         pb->inode_modified = 1;
2924                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
2925                                                               &extent);
2926                         if (pctx->errcode)
2927                                 return;
2928                         failed_csum = 0;
2929                 }
2930 #ifdef CONFIG_DEVELOPER_FEATURES
2931                 if (try_repairs && !is_dir && problem == 0 &&
2932                     (ctx->options & E2F_OPT_CLEAR_UNINIT) &&
2933                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
2934                     fix_problem(ctx, PR_1_CLEAR_UNINIT_EXTENT, pctx)) {
2935                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
2936                         pb->inode_modified = 1;
2937                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
2938                                                               &extent);
2939                         if (pctx->errcode)
2940                                 return;
2941                         failed_csum = 0;
2942                 }
2943 #endif
2944                 if (try_repairs && problem) {
2945 report_problem:
2946                         if (fix_problem(ctx, problem, pctx)) {
2947                                 if (ctx->invalid_bitmaps) {
2948                                         /*
2949                                          * If fsck knows the bitmaps are bad,
2950                                          * skip to the next extent and
2951                                          * try to clear this extent again
2952                                          * after fixing the bitmaps, by
2953                                          * restarting fsck.
2954                                          */
2955                                         pctx->errcode = ext2fs_extent_get(
2956                                                           ehandle,
2957                                                           EXT2_EXTENT_NEXT_SIB,
2958                                                           &extent);
2959                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
2960                                         if (pctx->errcode ==
2961                                                     EXT2_ET_NO_CURRENT_NODE) {
2962                                                 pctx->errcode = 0;
2963                                                 break;
2964                                         }
2965                                         continue;
2966                                 }
2967                                 e2fsck_read_bitmaps(ctx);
2968                                 pb->inode_modified = 1;
2969                                 pctx->errcode =
2970                                         ext2fs_extent_delete(ehandle, 0);
2971                                 if (pctx->errcode) {
2972                                         pctx->str = "ext2fs_extent_delete";
2973                                         return;
2974                                 }
2975                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
2976                                 if (pctx->errcode &&
2977                                     pctx->errcode != EXT2_ET_NO_CURRENT_NODE) {
2978                                         pctx->str = "ext2fs_extent_fix_parents";
2979                                         return;
2980                                 }
2981                                 pctx->errcode = ext2fs_extent_get(ehandle,
2982                                                                   EXT2_EXTENT_CURRENT,
2983                                                                   &extent);
2984                                 if (pctx->errcode == EXT2_ET_NO_CURRENT_NODE) {
2985                                         pctx->errcode = 0;
2986                                         break;
2987                                 }
2988                                 failed_csum = 0;
2989                                 continue;
2990                         }
2991                         goto next;
2992                 }
2993
2994                 if (!is_leaf) {
2995                         blk64_t lblk = extent.e_lblk;
2996                         int next_try_repairs = 1;
2997
2998                         blk = extent.e_pblk;
2999
3000                         /*
3001                          * If this lower extent block collides with critical
3002                          * metadata, don't try to repair the damage.  Pass 1b
3003                          * will reallocate the block; then we can try again.
3004                          */
3005                         if (pb->ino != EXT2_RESIZE_INO &&
3006                             extent.e_pblk < ctx->fs->super->s_blocks_count &&
3007                             ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3008                                                       extent.e_pblk)) {
3009                                 next_try_repairs = 0;
3010                                 pctx->blk = blk;
3011                                 fix_problem(ctx,
3012                                             PR_1_CRITICAL_METADATA_COLLISION,
3013                                             pctx);
3014                                 if ((ctx->options & E2F_OPT_NO) == 0)
3015                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3016                         }
3017                         pctx->errcode = ext2fs_extent_get(ehandle,
3018                                                   EXT2_EXTENT_DOWN, &extent);
3019                         if (pctx->errcode &&
3020                             pctx->errcode != EXT2_ET_EXTENT_CSUM_INVALID) {
3021                                 pctx->str = "EXT2_EXTENT_DOWN";
3022                                 problem = PR_1_EXTENT_HEADER_INVALID;
3023                                 if (!next_try_repairs)
3024                                         return;
3025                                 if (pctx->errcode == EXT2_ET_EXTENT_HEADER_BAD)
3026                                         goto report_problem;
3027                                 return;
3028                         }
3029                         /* The next extent should match this index's logical start */
3030                         if (extent.e_lblk != lblk) {
3031                                 struct ext2_extent_info e_info;
3032
3033                                 pctx->errcode = ext2fs_extent_get_info(ehandle,
3034                                                                        &e_info);
3035                                 if (pctx->errcode) {
3036                                         pctx->str = "ext2fs_extent_get_info";
3037                                         return;
3038                                 }
3039                                 pctx->blk = lblk;
3040                                 pctx->blk2 = extent.e_lblk;
3041                                 pctx->num = e_info.curr_level - 1;
3042                                 problem = PR_1_EXTENT_INDEX_START_INVALID;
3043                                 if (fix_problem(ctx, problem, pctx)) {
3044                                         pb->inode_modified = 1;
3045                                         pctx->errcode =
3046                                                 ext2fs_extent_fix_parents(ehandle);
3047                                         if (pctx->errcode) {
3048                                                 pctx->str = "ext2fs_extent_fix_parents";
3049                                                 return;
3050                                         }
3051                                 }
3052                         }
3053                         scan_extent_node(ctx, pctx, pb, extent.e_lblk,
3054                                          last_lblk, eof_block, ehandle,
3055                                          next_try_repairs);
3056                         if (pctx->errcode)
3057                                 return;
3058                         pctx->errcode = ext2fs_extent_get(ehandle,
3059                                                   EXT2_EXTENT_UP, &extent);
3060                         if (pctx->errcode) {
3061                                 pctx->str = "EXT2_EXTENT_UP";
3062                                 return;
3063                         }
3064                         mark_block_used(ctx, blk);
3065                         pb->num_blocks++;
3066                         goto next;
3067                 }
3068
3069                 if ((pb->previous_block != 0) &&
3070                     (pb->previous_block+1 != extent.e_pblk)) {
3071                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3072                                 char type = '?';
3073
3074                                 if (pb->is_dir)
3075                                         type = 'd';
3076                                 else if (pb->is_reg)
3077                                         type = 'f';
3078
3079                                 printf(("%6lu(%c): expecting %6lu "
3080                                         "actual extent "
3081                                         "phys %6lu log %lu len %lu\n"),
3082                                        (unsigned long) pctx->ino, type,
3083                                        (unsigned long) pb->previous_block+1,
3084                                        (unsigned long) extent.e_pblk,
3085                                        (unsigned long) extent.e_lblk,
3086                                        (unsigned long) extent.e_len);
3087                         }
3088                         pb->fragmented = 1;
3089                 }
3090                 /*
3091                  * If we notice a gap in the logical block mappings of an
3092                  * extent-mapped directory, offer to close the hole by
3093                  * moving the logical block down, otherwise we'll go mad in
3094                  * pass 3 allocating empty directory blocks to fill the hole.
3095                  */
3096                 if (try_repairs && is_dir &&
3097                     pb->last_block + 1 < extent.e_lblk) {
3098                         blk64_t new_lblk;
3099
3100                         new_lblk = pb->last_block + 1;
3101                         if (EXT2FS_CLUSTER_RATIO(ctx->fs) > 1)
3102                                 new_lblk = ((new_lblk +
3103                                              EXT2FS_CLUSTER_RATIO(ctx->fs) - 1) &
3104                                             ~EXT2FS_CLUSTER_MASK(ctx->fs)) |
3105                                            (extent.e_pblk &
3106                                             EXT2FS_CLUSTER_MASK(ctx->fs));
3107                         pctx->blk = extent.e_lblk;
3108                         pctx->blk2 = new_lblk;
3109                         if (fix_problem(ctx, PR_1_COLLAPSE_DBLOCK, pctx)) {
3110                                 extent.e_lblk = new_lblk;
3111                                 pb->inode_modified = 1;
3112                                 pctx->errcode = ext2fs_extent_replace(ehandle,
3113                                                                 0, &extent);
3114                                 if (pctx->errcode) {
3115                                         pctx->errcode = 0;
3116                                         goto alloc_later;
3117                                 }
3118                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3119                                 if (pctx->errcode)
3120                                         goto failed_add_dir_block;
3121                                 pctx->errcode = ext2fs_extent_goto(ehandle,
3122                                                                 extent.e_lblk);
3123                                 if (pctx->errcode)
3124                                         goto failed_add_dir_block;
3125                                 last_lblk = extent.e_lblk + extent.e_len - 1;
3126                                 failed_csum = 0;
3127                         }
3128                 }
3129 alloc_later:
3130                 if (is_dir) {
3131                         while (++pb->last_db_block <
3132                                (e2_blkcnt_t) extent.e_lblk) {
3133                                 pctx->errcode = ext2fs_add_dir_block2(
3134                                                         ctx->fs->dblist,
3135                                                         pb->ino, 0,
3136                                                         pb->last_db_block);
3137                                 if (pctx->errcode) {
3138                                         pctx->blk = 0;
3139                                         pctx->num = pb->last_db_block;
3140                                         goto failed_add_dir_block;
3141                                 }
3142                         }
3143
3144                         for (i = 0; i < extent.e_len; i++) {
3145                                 pctx->errcode = ext2fs_add_dir_block2(
3146                                                         ctx->fs->dblist,
3147                                                         pctx->ino,
3148                                                         extent.e_pblk + i,
3149                                                         extent.e_lblk + i);
3150                                 if (pctx->errcode) {
3151                                         pctx->blk = extent.e_pblk + i;
3152                                         pctx->num = extent.e_lblk + i;
3153                                 failed_add_dir_block:
3154                                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3155                                         /* Should never get here */
3156                                         ctx->flags |= E2F_FLAG_ABORT;
3157                                         return;
3158                                 }
3159                         }
3160                         if (extent.e_len > 0)
3161                                 pb->last_db_block = extent.e_lblk + extent.e_len - 1;
3162                 }
3163                 if (has_unaligned_cluster_map(ctx, pb->previous_block,
3164                                               pb->last_block,
3165                                               extent.e_pblk,
3166                                               extent.e_lblk)) {
3167                         for (i = 0; i < extent.e_len; i++) {
3168                                 pctx->blk = extent.e_lblk + i;
3169                                 pctx->blk2 = extent.e_pblk + i;
3170                                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3171                                 mark_block_used(ctx, extent.e_pblk + i);
3172                                 mark_block_used(ctx, extent.e_pblk + i);
3173                         }
3174                 }
3175
3176                 /*
3177                  * Check whether first cluster got marked in previous iteration.
3178                  */
3179                 if (ctx->fs->cluster_ratio_bits &&
3180                     pb->previous_block &&
3181                     (EXT2FS_B2C(ctx->fs, extent.e_pblk) ==
3182                      EXT2FS_B2C(ctx->fs, pb->previous_block)))
3183                         /* Set blk to the beginning of next cluster. */
3184                         blk = EXT2FS_C2B(
3185                                 ctx->fs,
3186                                 EXT2FS_B2C(ctx->fs, extent.e_pblk) + 1);
3187                 else
3188                         /* Set blk to the beginning of current cluster. */
3189                         blk = EXT2FS_C2B(ctx->fs,
3190                                          EXT2FS_B2C(ctx->fs, extent.e_pblk));
3191
3192                 if (blk < extent.e_pblk + extent.e_len) {
3193                         mark_blocks_used(ctx, blk,
3194                                          extent.e_pblk + extent.e_len - blk);
3195                         n = DIV_ROUND_UP(extent.e_pblk + extent.e_len - blk,
3196                                          EXT2FS_CLUSTER_RATIO(ctx->fs));
3197                         pb->num_blocks += n;
3198                 }
3199                 pb->last_block = extent.e_lblk + extent.e_len - 1;
3200                 pb->previous_block = extent.e_pblk + extent.e_len - 1;
3201                 start_block = pb->last_block = last_lblk;
3202                 if (is_leaf && !is_dir &&
3203                     !(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT))
3204                         pb->last_init_lblock = last_lblk;
3205         next:
3206                 pctx->errcode = ext2fs_extent_get(ehandle,
3207                                                   EXT2_EXTENT_NEXT_SIB,
3208                                                   &extent);
3209         }
3210
3211         /* Failed csum but passes checks?  Ask to fix checksum. */
3212         if (failed_csum &&
3213             fix_problem(ctx, PR_1_EXTENT_ONLY_CSUM_INVALID, pctx)) {
3214                 pb->inode_modified = 1;
3215                 pctx->errcode = ext2fs_extent_replace(ehandle, 0, &extent);
3216                 if (pctx->errcode)
3217                         return;
3218         }
3219
3220         if (pctx->errcode == EXT2_ET_EXTENT_NO_NEXT)
3221                 pctx->errcode = 0;
3222 }
3223
3224 static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx,
3225                                  struct process_block_struct *pb)
3226 {
3227         struct ext2_extent_info info;
3228         struct ext2_inode       *inode = pctx->inode;
3229         ext2_extent_handle_t    ehandle;
3230         ext2_filsys             fs = ctx->fs;
3231         ext2_ino_t              ino = pctx->ino;
3232         errcode_t               retval;
3233         blk64_t                 eof_lblk;
3234         struct ext3_extent_header       *eh;
3235
3236         /* Check for a proper extent header... */
3237         eh = (struct ext3_extent_header *) &inode->i_block[0];
3238         retval = ext2fs_extent_header_verify(eh, sizeof(inode->i_block));
3239         if (retval) {
3240                 if (fix_problem(ctx, PR_1_MISSING_EXTENT_HEADER, pctx))
3241                         e2fsck_clear_inode(ctx, ino, inode, 0,
3242                                            "check_blocks_extents");
3243                 pctx->errcode = 0;
3244                 return;
3245         }
3246
3247         /* ...since this function doesn't fail if i_block is zeroed. */
3248         pctx->errcode = ext2fs_extent_open2(fs, ino, inode, &ehandle);
3249         if (pctx->errcode) {
3250                 if (fix_problem(ctx, PR_1_READ_EXTENT, pctx))
3251                         e2fsck_clear_inode(ctx, ino, inode, 0,
3252                                            "check_blocks_extents");
3253                 pctx->errcode = 0;
3254                 return;
3255         }
3256
3257         retval = ext2fs_extent_get_info(ehandle, &info);
3258         if (retval == 0) {
3259                 int max_depth = info.max_depth;
3260
3261                 if (max_depth >= MAX_EXTENT_DEPTH_COUNT)
3262                         max_depth = MAX_EXTENT_DEPTH_COUNT-1;
3263                 ctx->extent_depth_count[max_depth]++;
3264         }
3265
3266         /* Check maximum extent depth */
3267         pctx->blk = info.max_depth;
3268         pctx->blk2 = ext2fs_max_extent_depth(ehandle);
3269         if (pctx->blk2 < pctx->blk &&
3270             fix_problem(ctx, PR_1_EXTENT_BAD_MAX_DEPTH, pctx))
3271                 pb->eti.force_rebuild = 1;
3272
3273         /* Can we collect extent tree level stats? */
3274         pctx->blk = MAX_EXTENT_DEPTH_COUNT;
3275         if (pctx->blk2 > pctx->blk)
3276                 fix_problem(ctx, PR_1E_MAX_EXTENT_TREE_DEPTH, pctx);
3277         memset(pb->eti.ext_info, 0, sizeof(pb->eti.ext_info));
3278         pb->eti.ino = pb->ino;
3279
3280         pb->next_lblock = 0;
3281
3282         eof_lblk = ((EXT2_I_SIZE(inode) + fs->blocksize - 1) >>
3283                 EXT2_BLOCK_SIZE_BITS(fs->super)) - 1;
3284         scan_extent_node(ctx, pctx, pb, 0, 0, eof_lblk, ehandle, 1);
3285         if (pctx->errcode &&
3286             fix_problem(ctx, PR_1_EXTENT_ITERATE_FAILURE, pctx)) {
3287                 pb->num_blocks = 0;
3288                 inode->i_blocks = 0;
3289                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3290                                    "check_blocks_extents");
3291                 pctx->errcode = 0;
3292         }
3293         ext2fs_extent_free(ehandle);
3294
3295         /* Rebuild unless it's a dir and we're rehashing it */
3296         if (LINUX_S_ISDIR(inode->i_mode) &&
3297             e2fsck_dir_will_be_rehashed(ctx, ino))
3298                 return;
3299
3300         if (ctx->options & E2F_OPT_CONVERT_BMAP)
3301                 e2fsck_rebuild_extents_later(ctx, ino);
3302         else
3303                 e2fsck_should_rebuild_extents(ctx, pctx, &pb->eti, &info);
3304 }
3305
3306 /*
3307  * In fact we don't need to check blocks for an inode with inline data
3308  * because this inode doesn't have any blocks.  In this function all
3309  * we need to do is add this inode into dblist when it is a directory.
3310  */
3311 static void check_blocks_inline_data(e2fsck_t ctx, struct problem_context *pctx,
3312                                      struct process_block_struct *pb)
3313 {
3314         int     flags;
3315         size_t  inline_data_size = 0;
3316
3317         if (!pb->is_dir) {
3318                 pctx->errcode = 0;
3319                 return;
3320         }
3321
3322         /* Process the dirents in i_block[] as the "first" block. */
3323         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 0);
3324         if (pctx->errcode)
3325                 goto err;
3326
3327         /* Process the dirents in the EA as a "second" block. */
3328         flags = ctx->fs->flags;
3329         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3330         pctx->errcode = ext2fs_inline_data_size(ctx->fs, pb->ino,
3331                                                 &inline_data_size);
3332         ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3333                          (ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3334         if (pctx->errcode) {
3335                 pctx->errcode = 0;
3336                 return;
3337         }
3338
3339         if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE)
3340                 return;
3341
3342         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 1);
3343         if (pctx->errcode)
3344                 goto err;
3345
3346         return;
3347 err:
3348         pctx->blk = 0;
3349         pctx->num = 0;
3350         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3351         ctx->flags |= E2F_FLAG_ABORT;
3352 }
3353
3354 /*
3355  * This subroutine is called on each inode to account for all of the
3356  * blocks used by that inode.
3357  */
3358 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
3359                          char *block_buf, const struct ea_quota *ea_ibody_quota)
3360 {
3361         ext2_filsys fs = ctx->fs;
3362         struct process_block_struct pb;
3363         ext2_ino_t      ino = pctx->ino;
3364         struct ext2_inode *inode = pctx->inode;
3365         unsigned        bad_size = 0;
3366         int             dirty_inode = 0;
3367         int             extent_fs;
3368         int             inlinedata_fs;
3369         __u64           size;
3370         struct ea_quota ea_block_quota;
3371
3372         pb.ino = ino;
3373         pb.num_blocks = EXT2FS_B2C(ctx->fs,
3374                                    ea_ibody_quota ? ea_ibody_quota->blocks : 0);
3375         pb.last_block = ~0;
3376         pb.last_init_lblock = -1;
3377         pb.last_db_block = -1;
3378         pb.num_illegal_blocks = 0;
3379         pb.suppress = 0; pb.clear = 0;
3380         pb.fragmented = 0;
3381         pb.compressed = 0;
3382         pb.previous_block = 0;
3383         pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
3384         pb.is_reg = LINUX_S_ISREG(inode->i_mode);
3385         pb.max_blocks = 1U << (31 - fs->super->s_log_block_size);
3386         pb.inode = inode;
3387         pb.pctx = pctx;
3388         pb.ctx = ctx;
3389         pb.inode_modified = 0;
3390         pb.eti.force_rebuild = 0;
3391         pctx->ino = ino;
3392         pctx->errcode = 0;
3393
3394         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
3395         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
3396
3397         if (check_ext_attr(ctx, pctx, block_buf, &ea_block_quota)) {
3398                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3399                         goto out;
3400                 pb.num_blocks += EXT2FS_B2C(ctx->fs, ea_block_quota.blocks);
3401         }
3402
3403         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL))
3404                 check_blocks_inline_data(ctx, pctx, &pb);
3405         else if (ext2fs_inode_has_valid_blocks2(fs, inode)) {
3406                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL))
3407                         check_blocks_extents(ctx, pctx, &pb);
3408                 else {
3409                         int flags;
3410                         /*
3411                          * If we've modified the inode, write it out before
3412                          * iterate() tries to use it.
3413                          */
3414                         if (dirty_inode) {
3415                                 e2fsck_write_inode(ctx, ino, inode,
3416                                                    "check_blocks");
3417                                 dirty_inode = 0;
3418                         }
3419                         flags = fs->flags;
3420                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3421                         pctx->errcode = ext2fs_block_iterate3(fs, ino,
3422                                                 pb.is_dir ? BLOCK_FLAG_HOLE : 0,
3423                                                 block_buf, process_block, &pb);
3424                         /*
3425                          * We do not have uninitialized extents in non extent
3426                          * files.
3427                          */
3428                         pb.last_init_lblock = pb.last_block;
3429                         /*
3430                          * If iterate() changed a block mapping, we have to
3431                          * re-read the inode.  If we decide to clear the
3432                          * inode after clearing some stuff, we'll re-write the
3433                          * bad mappings into the inode!
3434                          */
3435                         if (pb.inode_modified)
3436                                 e2fsck_read_inode(ctx, ino, inode,
3437                                                   "check_blocks");
3438                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3439                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3440
3441                         if (ctx->options & E2F_OPT_CONVERT_BMAP) {
3442 #ifdef DEBUG
3443                                 printf("bmap rebuild ino=%d\n", ino);
3444 #endif
3445                                 if (!LINUX_S_ISDIR(inode->i_mode) ||
3446                                     !e2fsck_dir_will_be_rehashed(ctx, ino))
3447                                         e2fsck_rebuild_extents_later(ctx, ino);
3448                         }
3449                 }
3450         }
3451         end_problem_latch(ctx, PR_LATCH_BLOCK);
3452         end_problem_latch(ctx, PR_LATCH_TOOBIG);
3453         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3454                 goto out;
3455         if (pctx->errcode)
3456                 fix_problem(ctx, PR_1_BLOCK_ITERATE, pctx);
3457
3458         if (pb.fragmented && pb.num_blocks < fs->super->s_blocks_per_group) {
3459                 if (LINUX_S_ISDIR(inode->i_mode))
3460                         ctx->fs_fragmented_dir++;
3461                 else
3462                         ctx->fs_fragmented++;
3463         }
3464
3465         if (pb.clear) {
3466                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3467                                    "check_blocks");
3468                 return;
3469         }
3470
3471         if (inode->i_flags & EXT2_INDEX_FL) {
3472                 if (handle_htree(ctx, pctx, ino, inode, block_buf)) {
3473                         inode->i_flags &= ~EXT2_INDEX_FL;
3474                         dirty_inode++;
3475                 } else {
3476                         e2fsck_add_dx_dir(ctx, ino, inode, pb.last_block+1);
3477                 }
3478         }
3479
3480         if (!pb.num_blocks && pb.is_dir &&
3481             !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
3482                 if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) {
3483                         e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks");
3484                         ctx->fs_directory_count--;
3485                         return;
3486                 }
3487         }
3488
3489         if (ino != quota_type2inum(PRJQUOTA, fs->super) &&
3490             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super)) &&
3491             !(inode->i_flags & EXT4_EA_INODE_FL)) {
3492                 quota_data_add(ctx->qctx, (struct ext2_inode_large *) inode,
3493                                ino,
3494                                pb.num_blocks * EXT2_CLUSTER_SIZE(fs->super));
3495                 quota_data_inodes(ctx->qctx, (struct ext2_inode_large *) inode,
3496                                   ino, (ea_ibody_quota ?
3497                                         ea_ibody_quota->inodes : 0) +
3498                                                 ea_block_quota.inodes + 1);
3499         }
3500
3501         if (!ext2fs_has_feature_huge_file(fs->super) ||
3502             !(inode->i_flags & EXT4_HUGE_FILE_FL))
3503                 pb.num_blocks *= (fs->blocksize / 512);
3504         pb.num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
3505 #if 0
3506         printf("inode %u, i_size = %u, last_block = %llu, i_blocks=%llu, num_blocks = %llu\n",
3507                ino, inode->i_size, (unsigned long long) pb.last_block,
3508                (unsigned long long) ext2fs_inode_i_blocks(fs, inode),
3509                (unsigned long long) pb.num_blocks);
3510 #endif
3511         size = EXT2_I_SIZE(inode);
3512         if (pb.is_dir) {
3513                 unsigned nblock = size >> EXT2_BLOCK_SIZE_BITS(fs->super);
3514                 if (inode->i_flags & EXT4_INLINE_DATA_FL) {
3515                         int flags;
3516                         size_t sz = 0;
3517                         errcode_t err;
3518
3519                         flags = ctx->fs->flags;
3520                         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3521                         err = ext2fs_inline_data_size(ctx->fs, pctx->ino,
3522                                                       &sz);
3523                         ctx->fs->flags = (flags &
3524                                           EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3525                                          (ctx->fs->flags &
3526                                           ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3527                         if (err || sz != size) {
3528                                 bad_size = 7;
3529                                 pctx->num = sz;
3530                         }
3531                 } else if (size & (fs->blocksize - 1))
3532                         bad_size = 5;
3533                 else if (nblock > (pb.last_block + 1))
3534                         bad_size = 1;
3535                 else if (nblock < (pb.last_block + 1)) {
3536                         if (((pb.last_block + 1) - nblock) >
3537                             fs->super->s_prealloc_dir_blocks)
3538                                 bad_size = 2;
3539                 }
3540         } else {
3541                 if ((pb.last_init_lblock >= 0) &&
3542                     /* Do not allow initialized allocated blocks past i_size*/
3543                     (size < (__u64)pb.last_init_lblock * fs->blocksize) &&
3544                     !(inode->i_flags & EXT4_VERITY_FL))
3545                         bad_size = 3;
3546                 else if (!(extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3547                          size > ext2_max_sizes[fs->super->s_log_block_size])
3548                         /* too big for a direct/indirect-mapped file */
3549                         bad_size = 4;
3550                 else if ((extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3551                          size >
3552                          ((1ULL << (32 + EXT2_BLOCK_SIZE_BITS(fs->super))) - 1))
3553                         /* too big for an extent-based file - 32bit ee_block */
3554                         bad_size = 6;
3555         }
3556         /* i_size for symlinks is checked elsewhere */
3557         if (bad_size && !LINUX_S_ISLNK(inode->i_mode)) {
3558                 /* Did inline_data set pctx->num earlier? */
3559                 if (bad_size != 7)
3560                         pctx->num = (pb.last_block + 1) * fs->blocksize;
3561                 pctx->group = bad_size;
3562                 if (fix_problem(ctx, PR_1_BAD_I_SIZE, pctx)) {
3563                         ext2fs_inode_size_set(fs, inode, pctx->num);
3564                         if (EXT2_I_SIZE(inode) == 0 &&
3565                             (inode->i_flags & EXT4_INLINE_DATA_FL)) {
3566                                 memset(inode->i_block, 0,
3567                                        sizeof(inode->i_block));
3568                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
3569                         }
3570                         dirty_inode++;
3571                 }
3572                 pctx->num = 0;
3573         }
3574         if (LINUX_S_ISREG(inode->i_mode) &&
3575             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
3576                 ctx->large_files++;
3577         if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
3578             ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) ||
3579              (ext2fs_has_feature_huge_file(fs->super) &&
3580               (inode->i_flags & EXT4_HUGE_FILE_FL) &&
3581               (inode->osd2.linux2.l_i_blocks_hi != 0)))) {
3582                 pctx->num = pb.num_blocks;
3583                 if (fix_problem(ctx, PR_1_BAD_I_BLOCKS, pctx)) {
3584                         inode->i_blocks = pb.num_blocks;
3585                         inode->osd2.linux2.l_i_blocks_hi = pb.num_blocks >> 32;
3586                         dirty_inode++;
3587                 }
3588                 pctx->num = 0;
3589         }
3590
3591         /*
3592          * The kernel gets mad if we ask it to allocate bigalloc clusters to
3593          * a block mapped file, so rebuild it as an extent file.  We can skip
3594          * symlinks because they're never rewritten.
3595          */
3596         if (ext2fs_has_feature_bigalloc(fs->super) &&
3597             (LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode)) &&
3598             ext2fs_inode_data_blocks2(fs, inode) > 0 &&
3599             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INO(fs->super)) &&
3600             !(inode->i_flags & (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)) &&
3601             fix_problem(ctx, PR_1_NO_BIGALLOC_BLOCKMAP_FILES, pctx)) {
3602                 pctx->errcode = e2fsck_rebuild_extents_later(ctx, ino);
3603                 if (pctx->errcode)
3604                         goto out;
3605         }
3606
3607         if (ctx->dirs_to_hash && pb.is_dir &&
3608             !(ctx->lost_and_found && ctx->lost_and_found == ino) &&
3609             !(inode->i_flags & EXT2_INDEX_FL) &&
3610             ((inode->i_size / fs->blocksize) >= 3))
3611                 e2fsck_rehash_dir_later(ctx, ino);
3612
3613 out:
3614         if (dirty_inode)
3615                 e2fsck_write_inode(ctx, ino, inode, "check_blocks");
3616 }
3617
3618 #if 0
3619 /*
3620  * Helper function called by process block when an illegal block is
3621  * found.  It returns a description about why the block is illegal
3622  */
3623 static char *describe_illegal_block(ext2_filsys fs, blk64_t block)
3624 {
3625         blk64_t super;
3626         int     i;
3627         static char     problem[80];
3628
3629         super = fs->super->s_first_data_block;
3630         strcpy(problem, "PROGRAMMING ERROR: Unknown reason for illegal block");
3631         if (block < super) {
3632                 sprintf(problem, "< FIRSTBLOCK (%u)", super);
3633                 return(problem);
3634         } else if (block >= ext2fs_blocks_count(fs->super)) {
3635                 sprintf(problem, "> BLOCKS (%u)", ext2fs_blocks_count(fs->super));
3636                 return(problem);
3637         }
3638         for (i = 0; i < fs->group_desc_count; i++) {
3639                 if (block == super) {
3640                         sprintf(problem, "is the superblock in group %d", i);
3641                         break;
3642                 }
3643                 if (block > super &&
3644                     block <= (super + fs->desc_blocks)) {
3645                         sprintf(problem, "is in the group descriptors "
3646                                 "of group %d", i);
3647                         break;
3648                 }
3649                 if (block == ext2fs_block_bitmap_loc(fs, i)) {
3650                         sprintf(problem, "is the block bitmap of group %d", i);
3651                         break;
3652                 }
3653                 if (block == ext2fs_inode_bitmap_loc(fs, i)) {
3654                         sprintf(problem, "is the inode bitmap of group %d", i);
3655                         break;
3656                 }
3657                 if (block >= ext2fs_inode_table_loc(fs, i) &&
3658                     (block < ext2fs_inode_table_loc(fs, i)
3659                      + fs->inode_blocks_per_group)) {
3660                         sprintf(problem, "is in the inode table of group %d",
3661                                 i);
3662                         break;
3663                 }
3664                 super += fs->super->s_blocks_per_group;
3665         }
3666         return(problem);
3667 }
3668 #endif
3669
3670 /*
3671  * This is a helper function for check_blocks().
3672  */
3673 static int process_block(ext2_filsys fs,
3674                   blk64_t       *block_nr,
3675                   e2_blkcnt_t blockcnt,
3676                   blk64_t ref_block EXT2FS_ATTR((unused)),
3677                   int ref_offset EXT2FS_ATTR((unused)),
3678                   void *priv_data)
3679 {
3680         struct process_block_struct *p;
3681         struct problem_context *pctx;
3682         blk64_t blk = *block_nr;
3683         int     ret_code = 0;
3684         problem_t       problem = 0;
3685         e2fsck_t        ctx;
3686
3687         p = (struct process_block_struct *) priv_data;
3688         pctx = p->pctx;
3689         ctx = p->ctx;
3690
3691         /*
3692          * For a directory, add logical block zero for processing even if it's
3693          * not mapped or we'll be perennially stuck with broken "." and ".."
3694          * entries.
3695          */
3696         if (p->is_dir && blockcnt == 0 && blk == 0) {
3697                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino, 0, 0);
3698                 if (pctx->errcode) {
3699                         pctx->blk = blk;
3700                         pctx->num = blockcnt;
3701                         goto failed_add_dir_block;
3702                 }
3703                 p->last_db_block++;
3704         }
3705
3706         if (blk == 0)
3707                 return 0;
3708
3709 #if 0
3710         printf("Process_block, inode %lu, block %u, #%d\n", p->ino, blk,
3711                blockcnt);
3712 #endif
3713
3714         /*
3715          * Simplistic fragmentation check.  We merely require that the
3716          * file be contiguous.  (Which can never be true for really
3717          * big files that are greater than a block group.)
3718          */
3719         if (p->previous_block && p->ino != EXT2_RESIZE_INO) {
3720                 if (p->previous_block+1 != blk) {
3721                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3722                                 char type = '?';
3723
3724                                 if (p->is_dir)
3725                                         type = 'd';
3726                                 else if (p->is_reg)
3727                                         type = 'f';
3728
3729                                 printf(_("%6lu(%c): expecting %6lu "
3730                                          "got phys %6lu (blkcnt %lld)\n"),
3731                                        (unsigned long) pctx->ino, type,
3732                                        (unsigned long) p->previous_block+1,
3733                                        (unsigned long) blk,
3734                                        (long long) blockcnt);
3735                         }
3736                         p->fragmented = 1;
3737                 }
3738         }
3739
3740         if (p->is_dir && !ext2fs_has_feature_largedir(fs->super) &&
3741             !pctx->inode->i_size_high &&
3742             blockcnt > (1 << (21 - fs->super->s_log_block_size)))
3743                 problem = PR_1_TOOBIG_DIR;
3744         if (p->is_dir && p->num_blocks + 1 >= p->max_blocks)
3745                 problem = PR_1_TOOBIG_DIR;
3746         if (p->is_reg && p->num_blocks + 1 >= p->max_blocks)
3747                 problem = PR_1_TOOBIG_REG;
3748         if (!p->is_dir && !p->is_reg && blockcnt > 0)
3749                 problem = PR_1_TOOBIG_SYMLINK;
3750
3751         if (blk < fs->super->s_first_data_block ||
3752             blk >= ext2fs_blocks_count(fs->super))
3753                 problem = PR_1_ILLEGAL_BLOCK_NUM;
3754
3755         /*
3756          * If this IND/DIND/TIND block is squatting atop some critical metadata
3757          * (group descriptors, superblock, bitmap, inode table), any write to
3758          * "fix" mapping problems will destroy the metadata.  We'll let pass 1b
3759          * fix that and restart fsck.
3760          */
3761         if (blockcnt < 0 &&
3762             p->ino != EXT2_RESIZE_INO &&
3763             blk < ctx->fs->super->s_blocks_count &&
3764             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk)) {
3765                 pctx->blk = blk;
3766                 fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx);
3767                 if ((ctx->options & E2F_OPT_NO) == 0)
3768                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3769         }
3770
3771         if (problem) {
3772                 p->num_illegal_blocks++;
3773                 /*
3774                  * A bit of subterfuge here -- we're trying to fix a block
3775                  * mapping, but the IND/DIND/TIND block could have collided
3776                  * with some critical metadata.  So, fix the in-core mapping so
3777                  * iterate won't go insane, but return 0 instead of
3778                  * BLOCK_CHANGED so that it won't write the remapping out to
3779                  * our multiply linked block.
3780                  *
3781                  * Even if we previously determined that an *IND block
3782                  * conflicts with critical metadata, we must still try to
3783                  * iterate the *IND block as if it is an *IND block to find and
3784                  * mark the blocks it points to.  Better to be overly cautious
3785                  * with the used_blocks map so that we don't move the *IND
3786                  * block to a block that's really in use!
3787                  */
3788                 if (p->ino != EXT2_RESIZE_INO &&
3789                     ref_block != 0 &&
3790                     ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3791                                               ref_block)) {
3792                         *block_nr = 0;
3793                         return 0;
3794                 }
3795                 if (!p->suppress && (p->num_illegal_blocks % 12) == 0) {
3796                         if (fix_problem(ctx, PR_1_TOO_MANY_BAD_BLOCKS, pctx)) {
3797                                 p->clear = 1;
3798                                 return BLOCK_ABORT;
3799                         }
3800                         if (fix_problem(ctx, PR_1_SUPPRESS_MESSAGES, pctx)) {
3801                                 p->suppress = 1;
3802                                 set_latch_flags(PR_LATCH_BLOCK,
3803                                                 PRL_SUPPRESS, 0);
3804                         }
3805                 }
3806                 pctx->blk = blk;
3807                 pctx->blkcount = blockcnt;
3808                 if (fix_problem(ctx, problem, pctx)) {
3809                         blk = *block_nr = 0;
3810                         ret_code = BLOCK_CHANGED;
3811                         p->inode_modified = 1;
3812                         /*
3813                          * If the directory block is too big and is beyond the
3814                          * end of the FS, don't bother trying to add it for
3815                          * processing -- the kernel would never have created a
3816                          * directory this large, and we risk an ENOMEM abort.
3817                          * In any case, the toobig handler for extent-based
3818                          * directories also doesn't feed toobig blocks to
3819                          * pass 2.
3820                          */
3821                         if (problem == PR_1_TOOBIG_DIR)
3822                                 return ret_code;
3823                         goto mark_dir;
3824                 } else
3825                         return 0;
3826         }
3827
3828         if (p->ino == EXT2_RESIZE_INO) {
3829                 /*
3830                  * The resize inode has already be sanity checked
3831                  * during pass #0 (the superblock checks).  All we
3832                  * have to do is mark the double indirect block as
3833                  * being in use; all of the other blocks are handled
3834                  * by mark_table_blocks()).
3835                  */
3836                 if (blockcnt == BLOCK_COUNT_DIND)
3837                         mark_block_used(ctx, blk);
3838                 p->num_blocks++;
3839         } else if (!(ctx->fs->cluster_ratio_bits &&
3840                      p->previous_block &&
3841                      (EXT2FS_B2C(ctx->fs, blk) ==
3842                       EXT2FS_B2C(ctx->fs, p->previous_block)) &&
3843                      (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
3844                      ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
3845                 mark_block_used(ctx, blk);
3846                 p->num_blocks++;
3847         } else if (has_unaligned_cluster_map(ctx, p->previous_block,
3848                                              p->last_block, blk, blockcnt)) {
3849                 pctx->blk = blockcnt;
3850                 pctx->blk2 = blk;
3851                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3852                 mark_block_used(ctx, blk);
3853                 mark_block_used(ctx, blk);
3854         }
3855         if (blockcnt >= 0)
3856                 p->last_block = blockcnt;
3857         p->previous_block = blk;
3858 mark_dir:
3859         if (p->is_dir && (blockcnt >= 0)) {
3860                 while (++p->last_db_block < blockcnt) {
3861                         pctx->errcode = ext2fs_add_dir_block2(fs->dblist,
3862                                                               p->ino, 0,
3863                                                               p->last_db_block);
3864                         if (pctx->errcode) {
3865                                 pctx->blk = 0;
3866                                 pctx->num = p->last_db_block;
3867                                 goto failed_add_dir_block;
3868                         }
3869                 }
3870                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino,
3871                                                       blk, blockcnt);
3872                 if (pctx->errcode) {
3873                         pctx->blk = blk;
3874                         pctx->num = blockcnt;
3875                 failed_add_dir_block:
3876                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3877                         /* Should never get here */
3878                         ctx->flags |= E2F_FLAG_ABORT;
3879                         return BLOCK_ABORT;
3880                 }
3881         }
3882         return ret_code;
3883 }
3884
3885 static int process_bad_block(ext2_filsys fs,
3886                       blk64_t *block_nr,
3887                       e2_blkcnt_t blockcnt,
3888                       blk64_t ref_block EXT2FS_ATTR((unused)),
3889                       int ref_offset EXT2FS_ATTR((unused)),
3890                       void *priv_data)
3891 {
3892         struct process_block_struct *p;
3893         blk64_t         blk = *block_nr;
3894         blk64_t         first_block;
3895         dgrp_t          i;
3896         struct problem_context *pctx;
3897         e2fsck_t        ctx;
3898
3899         if (!blk)
3900                 return 0;
3901
3902         p = (struct process_block_struct *) priv_data;
3903         ctx = p->ctx;
3904         pctx = p->pctx;
3905
3906         pctx->ino = EXT2_BAD_INO;
3907         pctx->blk = blk;
3908         pctx->blkcount = blockcnt;
3909
3910         if ((blk < fs->super->s_first_data_block) ||
3911             (blk >= ext2fs_blocks_count(fs->super))) {
3912                 if (fix_problem(ctx, PR_1_BB_ILLEGAL_BLOCK_NUM, pctx)) {
3913                         *block_nr = 0;
3914                         return BLOCK_CHANGED;
3915                 } else
3916                         return 0;
3917         }
3918
3919         if (blockcnt < 0) {
3920                 if (ext2fs_test_block_bitmap2(p->fs_meta_blocks, blk)) {
3921                         p->bbcheck = 1;
3922                         if (fix_problem(ctx, PR_1_BB_FS_BLOCK, pctx)) {
3923                                 *block_nr = 0;
3924                                 return BLOCK_CHANGED;
3925                         }
3926                 } else if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3927                                                     blk)) {
3928                         p->bbcheck = 1;
3929                         if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK,
3930                                         pctx)) {
3931                                 *block_nr = 0;
3932                                 return BLOCK_CHANGED;
3933                         }
3934                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3935                                 return BLOCK_ABORT;
3936                 } else
3937                         mark_block_used(ctx, blk);
3938                 return 0;
3939         }
3940 #if 0
3941         printf ("DEBUG: Marking %u as bad.\n", blk);
3942 #endif
3943         ctx->fs_badblocks_count++;
3944         /*
3945          * If the block is not used, then mark it as used and return.
3946          * If it is already marked as found, this must mean that
3947          * there's an overlap between the filesystem table blocks
3948          * (bitmaps and inode table) and the bad block list.
3949          */
3950         if (!ext2fs_test_block_bitmap2(ctx->block_found_map, blk)) {
3951                 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
3952                 return 0;
3953         }
3954         /*
3955          * Try to find the where the filesystem block was used...
3956          */
3957         first_block = fs->super->s_first_data_block;
3958
3959         for (i = 0; i < fs->group_desc_count; i++ ) {
3960                 pctx->group = i;
3961                 pctx->blk = blk;
3962                 if (!ext2fs_bg_has_super(fs, i))
3963                         goto skip_super;
3964                 if (blk == first_block) {
3965                         if (i == 0) {
3966                                 if (fix_problem(ctx,
3967                                                 PR_1_BAD_PRIMARY_SUPERBLOCK,
3968                                                 pctx)) {
3969                                         *block_nr = 0;
3970                                         return BLOCK_CHANGED;
3971                                 }
3972                                 return 0;
3973                         }
3974                         fix_problem(ctx, PR_1_BAD_SUPERBLOCK, pctx);
3975                         return 0;
3976                 }
3977                 if ((blk > first_block) &&
3978                     (blk <= first_block + fs->desc_blocks)) {
3979                         if (i == 0) {
3980                                 pctx->blk = *block_nr;
3981                                 if (fix_problem(ctx,
3982                         PR_1_BAD_PRIMARY_GROUP_DESCRIPTOR, pctx)) {
3983                                         *block_nr = 0;
3984                                         return BLOCK_CHANGED;
3985                                 }
3986                                 return 0;
3987                         }
3988                         fix_problem(ctx, PR_1_BAD_GROUP_DESCRIPTORS, pctx);
3989                         return 0;
3990                 }
3991         skip_super:
3992                 if (blk == ext2fs_block_bitmap_loc(fs, i)) {
3993                         if (fix_problem(ctx, PR_1_BB_BAD_BLOCK, pctx)) {
3994                                 ctx->invalid_block_bitmap_flag[i]++;
3995                                 ctx->invalid_bitmaps++;
3996                         }
3997                         return 0;
3998                 }
3999                 if (blk == ext2fs_inode_bitmap_loc(fs, i)) {
4000                         if (fix_problem(ctx, PR_1_IB_BAD_BLOCK, pctx)) {
4001                                 ctx->invalid_inode_bitmap_flag[i]++;
4002                                 ctx->invalid_bitmaps++;
4003                         }
4004                         return 0;
4005                 }
4006                 if ((blk >= ext2fs_inode_table_loc(fs, i)) &&
4007                     (blk < (ext2fs_inode_table_loc(fs, i) +
4008                             fs->inode_blocks_per_group))) {
4009                         /*
4010                          * If there are bad blocks in the inode table,
4011                          * the inode scan code will try to do
4012                          * something reasonable automatically.
4013                          */
4014                         return 0;
4015                 }
4016                 first_block += fs->super->s_blocks_per_group;
4017         }
4018         /*
4019          * If we've gotten to this point, then the only
4020          * possibility is that the bad block inode meta data
4021          * is using a bad block.
4022          */
4023         if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) ||
4024             (blk == p->inode->i_block[EXT2_DIND_BLOCK]) ||
4025             (blk == p->inode->i_block[EXT2_TIND_BLOCK])) {
4026                 p->bbcheck = 1;
4027                 if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, pctx)) {
4028                         *block_nr = 0;
4029                         return BLOCK_CHANGED;
4030                 }
4031                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
4032                         return BLOCK_ABORT;
4033                 return 0;
4034         }
4035
4036         pctx->group = -1;
4037
4038         /* Warn user that the block wasn't claimed */
4039         fix_problem(ctx, PR_1_PROGERR_CLAIMED_BLOCK, pctx);
4040
4041         return 0;
4042 }
4043
4044 static void new_table_block(e2fsck_t ctx, blk64_t first_block, dgrp_t group,
4045                             const char *name, int num, blk64_t *new_block)
4046 {
4047         ext2_filsys fs = ctx->fs;
4048         dgrp_t          last_grp;
4049         blk64_t         old_block = *new_block;
4050         blk64_t         last_block;
4051         dgrp_t          flexbg;
4052         unsigned        flexbg_size;
4053         int             i, is_flexbg;
4054         char            *buf;
4055         struct problem_context  pctx;
4056
4057         clear_problem_context(&pctx);
4058
4059         pctx.group = group;
4060         pctx.blk = old_block;
4061         pctx.str = name;
4062
4063         /*
4064          * For flex_bg filesystems, first try to allocate the metadata
4065          * within the flex_bg, and if that fails then try finding the
4066          * space anywhere in the filesystem.
4067          */
4068         is_flexbg = ext2fs_has_feature_flex_bg(fs->super);
4069         if (is_flexbg) {
4070                 flexbg_size = 1U << fs->super->s_log_groups_per_flex;
4071                 flexbg = group / flexbg_size;
4072                 first_block = ext2fs_group_first_block2(fs,
4073                                                         flexbg_size * flexbg);
4074                 last_grp = group | (flexbg_size - 1);
4075                 if (last_grp >= fs->group_desc_count)
4076                         last_grp = fs->group_desc_count - 1;
4077                 last_block = ext2fs_group_last_block2(fs, last_grp);
4078         } else
4079                 last_block = ext2fs_group_last_block2(fs, group);
4080         pctx.errcode = ext2fs_get_free_blocks2(fs, first_block, last_block,
4081                                                num, ctx->block_found_map,
4082                                                new_block);
4083         if (is_flexbg && (pctx.errcode == EXT2_ET_BLOCK_ALLOC_FAIL))
4084                 pctx.errcode = ext2fs_get_free_blocks2(fs,
4085                                 fs->super->s_first_data_block,
4086                                 ext2fs_blocks_count(fs->super),
4087                                 num, ctx->block_found_map, new_block);
4088         if (pctx.errcode) {
4089                 pctx.num = num;
4090                 fix_problem(ctx, PR_1_RELOC_BLOCK_ALLOCATE, &pctx);
4091                 ext2fs_unmark_valid(fs);
4092                 ctx->flags |= E2F_FLAG_ABORT;
4093                 return;
4094         }
4095         pctx.errcode = ext2fs_get_mem(fs->blocksize, &buf);
4096         if (pctx.errcode) {
4097                 fix_problem(ctx, PR_1_RELOC_MEMORY_ALLOCATE, &pctx);
4098                 ext2fs_unmark_valid(fs);
4099                 ctx->flags |= E2F_FLAG_ABORT;
4100                 return;
4101         }
4102         ext2fs_mark_super_dirty(fs);
4103         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
4104         pctx.blk2 = *new_block;
4105         fix_problem(ctx, (old_block ? PR_1_RELOC_FROM_TO :
4106                           PR_1_RELOC_TO), &pctx);
4107         pctx.blk2 = 0;
4108         for (i = 0; i < num; i++) {
4109                 pctx.blk = i;
4110                 ext2fs_mark_block_bitmap2(ctx->block_found_map, (*new_block)+i);
4111                 if (old_block) {
4112                         pctx.errcode = io_channel_read_blk64(fs->io,
4113                                    old_block + i, 1, buf);
4114                         if (pctx.errcode)
4115                                 fix_problem(ctx, PR_1_RELOC_READ_ERR, &pctx);
4116                         pctx.blk = (*new_block) + i;
4117                         pctx.errcode = io_channel_write_blk64(fs->io, pctx.blk,
4118                                                               1, buf);
4119                 } else {
4120                         pctx.blk = (*new_block) + i;
4121                         pctx.errcode = ext2fs_zero_blocks2(fs, pctx.blk, 1,
4122                                                            NULL, NULL);
4123                 }
4124
4125                 if (pctx.errcode)
4126                         fix_problem(ctx, PR_1_RELOC_WRITE_ERR, &pctx);
4127         }
4128         ext2fs_free_mem(&buf);
4129 }
4130
4131 /*
4132  * This routine gets called at the end of pass 1 if bad blocks are
4133  * detected in the superblock, group descriptors, inode_bitmaps, or
4134  * block bitmaps.  At this point, all of the blocks have been mapped
4135  * out, so we can try to allocate new block(s) to replace the bad
4136  * blocks.
4137  */
4138 static void handle_fs_bad_blocks(e2fsck_t ctx)
4139 {
4140         ext2_filsys fs = ctx->fs;
4141         dgrp_t          i;
4142         blk64_t         first_block;
4143         blk64_t         new_blk;
4144
4145         for (i = 0; i < fs->group_desc_count; i++) {
4146                 first_block = ext2fs_group_first_block2(fs, i);
4147
4148                 if (ctx->invalid_block_bitmap_flag[i]) {
4149                         new_blk = ext2fs_block_bitmap_loc(fs, i);
4150                         new_table_block(ctx, first_block, i, _("block bitmap"),
4151                                         1, &new_blk);
4152                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
4153                 }
4154                 if (ctx->invalid_inode_bitmap_flag[i]) {
4155                         new_blk = ext2fs_inode_bitmap_loc(fs, i);
4156                         new_table_block(ctx, first_block, i, _("inode bitmap"),
4157                                         1, &new_blk);
4158                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
4159                 }
4160                 if (ctx->invalid_inode_table_flag[i]) {
4161                         new_blk = ext2fs_inode_table_loc(fs, i);
4162                         new_table_block(ctx, first_block, i, _("inode table"),
4163                                         fs->inode_blocks_per_group,
4164                                         &new_blk);
4165                         ext2fs_inode_table_loc_set(fs, i, new_blk);
4166                         ctx->flags |= E2F_FLAG_RESTART;
4167                 }
4168         }
4169         ctx->invalid_bitmaps = 0;
4170 }
4171
4172 /*
4173  * This routine marks all blocks which are used by the superblock,
4174  * group descriptors, inode bitmaps, and block bitmaps.
4175  */
4176 static void mark_table_blocks(e2fsck_t ctx)
4177 {
4178         ext2_filsys fs = ctx->fs;
4179         blk64_t b;
4180         dgrp_t  i;
4181         unsigned int    j;
4182         struct problem_context pctx;
4183
4184         clear_problem_context(&pctx);
4185
4186         for (i = 0; i < fs->group_desc_count; i++) {
4187                 pctx.group = i;
4188
4189                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_found_map);
4190                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_metadata_map);
4191
4192                 /*
4193                  * Mark the blocks used for the inode table
4194                  */
4195                 if (ext2fs_inode_table_loc(fs, i)) {
4196                         for (j = 0, b = ext2fs_inode_table_loc(fs, i);
4197                              j < fs->inode_blocks_per_group;
4198                              j++, b++) {
4199                                 if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4200                                                              b)) {
4201                                         pctx.blk = b;
4202                                         if (!ctx->invalid_inode_table_flag[i] &&
4203                                             fix_problem(ctx,
4204                                                 PR_1_ITABLE_CONFLICT, &pctx)) {
4205                                                 ctx->invalid_inode_table_flag[i]++;
4206                                                 ctx->invalid_bitmaps++;
4207                                         }
4208                                 } else {
4209                                     ext2fs_mark_block_bitmap2(
4210                                                 ctx->block_found_map, b);
4211                                     ext2fs_mark_block_bitmap2(
4212                                                 ctx->block_metadata_map, b);
4213                                 }
4214                         }
4215                 }
4216
4217                 /*
4218                  * Mark block used for the block bitmap
4219                  */
4220                 if (ext2fs_block_bitmap_loc(fs, i)) {
4221                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4222                                      ext2fs_block_bitmap_loc(fs, i))) {
4223                                 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
4224                                 if (fix_problem(ctx, PR_1_BB_CONFLICT, &pctx)) {
4225                                         ctx->invalid_block_bitmap_flag[i]++;
4226                                         ctx->invalid_bitmaps++;
4227                                 }
4228                         } else {
4229                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4230                                      ext2fs_block_bitmap_loc(fs, i));
4231                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4232                                      ext2fs_block_bitmap_loc(fs, i));
4233                         }
4234                 }
4235                 /*
4236                  * Mark block used for the inode bitmap
4237                  */
4238                 if (ext2fs_inode_bitmap_loc(fs, i)) {
4239                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4240                                      ext2fs_inode_bitmap_loc(fs, i))) {
4241                                 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
4242                                 if (fix_problem(ctx, PR_1_IB_CONFLICT, &pctx)) {
4243                                         ctx->invalid_inode_bitmap_flag[i]++;
4244                                         ctx->invalid_bitmaps++;
4245                                 }
4246                         } else {
4247                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4248                                      ext2fs_inode_bitmap_loc(fs, i));
4249                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4250                                      ext2fs_inode_bitmap_loc(fs, i));
4251                         }
4252                 }
4253         }
4254 }
4255
4256 /*
4257  * These subroutines short circuits ext2fs_get_blocks and
4258  * ext2fs_check_directory; we use them since we already have the inode
4259  * structure, so there's no point in letting the ext2fs library read
4260  * the inode again.
4261  */
4262 static errcode_t pass1_get_blocks(ext2_filsys fs, ext2_ino_t ino,
4263                                   blk_t *blocks)
4264 {
4265         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4266         int     i;
4267
4268         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4269                 return EXT2_ET_CALLBACK_NOTHANDLED;
4270
4271         for (i=0; i < EXT2_N_BLOCKS; i++)
4272                 blocks[i] = ctx->stashed_inode->i_block[i];
4273         return 0;
4274 }
4275
4276 static errcode_t pass1_read_inode(ext2_filsys fs, ext2_ino_t ino,
4277                                   struct ext2_inode *inode)
4278 {
4279         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4280
4281         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4282                 return EXT2_ET_CALLBACK_NOTHANDLED;
4283         *inode = *ctx->stashed_inode;
4284         return 0;
4285 }
4286
4287 static errcode_t pass1_write_inode(ext2_filsys fs, ext2_ino_t ino,
4288                             struct ext2_inode *inode)
4289 {
4290         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4291
4292         if ((ino == ctx->stashed_ino) && ctx->stashed_inode &&
4293                 (inode != ctx->stashed_inode))
4294                 *ctx->stashed_inode = *inode;
4295         return EXT2_ET_CALLBACK_NOTHANDLED;
4296 }
4297
4298 static errcode_t pass1_check_directory(ext2_filsys fs, ext2_ino_t ino)
4299 {
4300         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4301
4302         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4303                 return EXT2_ET_CALLBACK_NOTHANDLED;
4304
4305         if (!LINUX_S_ISDIR(ctx->stashed_inode->i_mode))
4306                 return EXT2_ET_NO_DIRECTORY;
4307         return 0;
4308 }
4309
4310 static errcode_t e2fsck_get_alloc_block(ext2_filsys fs, blk64_t goal,
4311                                         blk64_t *ret)
4312 {
4313         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4314         errcode_t       retval;
4315         blk64_t         new_block;
4316
4317         if (ctx->block_found_map) {
4318                 retval = ext2fs_new_block2(fs, goal, ctx->block_found_map,
4319                                            &new_block);
4320                 if (retval)
4321                         return retval;
4322                 if (fs->block_map) {
4323                         ext2fs_mark_block_bitmap2(fs->block_map, new_block);
4324                         ext2fs_mark_bb_dirty(fs);
4325                 }
4326         } else {
4327                 if (!fs->block_map) {
4328                         retval = ext2fs_read_block_bitmap(fs);
4329                         if (retval)
4330                                 return retval;
4331                 }
4332
4333                 retval = ext2fs_new_block2(fs, goal, fs->block_map, &new_block);
4334                 if (retval)
4335                         return retval;
4336         }
4337
4338         *ret = new_block;
4339         return (0);
4340 }
4341
4342 static errcode_t e2fsck_new_range(ext2_filsys fs, int flags, blk64_t goal,
4343                                   blk64_t len, blk64_t *pblk, blk64_t *plen)
4344 {
4345         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4346         errcode_t       retval;
4347
4348         if (ctx->block_found_map)
4349                 return ext2fs_new_range(fs, flags, goal, len,
4350                                         ctx->block_found_map, pblk, plen);
4351
4352         if (!fs->block_map) {
4353                 retval = ext2fs_read_block_bitmap(fs);
4354                 if (retval)
4355                         return retval;
4356         }
4357
4358         return ext2fs_new_range(fs, flags, goal, len, fs->block_map,
4359                                 pblk, plen);
4360 }
4361
4362 static void e2fsck_block_alloc_stats(ext2_filsys fs, blk64_t blk, int inuse)
4363 {
4364         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4365
4366         /* Never free a critical metadata block */
4367         if (ctx->block_found_map &&
4368             ctx->block_metadata_map &&
4369             inuse < 0 &&
4370             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk))
4371                 return;
4372
4373         if (ctx->block_found_map) {
4374                 if (inuse > 0)
4375                         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4376                 else
4377                         ext2fs_unmark_block_bitmap2(ctx->block_found_map, blk);
4378         }
4379 }
4380
4381 static void e2fsck_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
4382                                            blk_t num, int inuse)
4383 {
4384         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4385
4386         /* Never free a critical metadata block */
4387         if (ctx->block_found_map &&
4388             ctx->block_metadata_map &&
4389             inuse < 0 &&
4390             ext2fs_test_block_bitmap_range2(ctx->block_metadata_map, blk, num))
4391                 return;
4392
4393         if (ctx->block_found_map) {
4394                 if (inuse > 0)
4395                         ext2fs_mark_block_bitmap_range2(ctx->block_found_map,
4396                                                         blk, num);
4397                 else
4398                         ext2fs_unmark_block_bitmap_range2(ctx->block_found_map,
4399                                                         blk, num);
4400         }
4401 }
4402
4403 void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts)
4404 {
4405         ext2_filsys fs = ctx->fs;
4406
4407         if (use_shortcuts) {
4408                 fs->get_blocks = pass1_get_blocks;
4409                 fs->check_directory = pass1_check_directory;
4410                 fs->read_inode = pass1_read_inode;
4411                 fs->write_inode = pass1_write_inode;
4412                 ctx->stashed_ino = 0;
4413         } else {
4414                 fs->get_blocks = 0;
4415                 fs->check_directory = 0;
4416                 fs->read_inode = 0;
4417                 fs->write_inode = 0;
4418         }
4419 }
4420
4421 void e2fsck_intercept_block_allocations(e2fsck_t ctx)
4422 {
4423         ext2fs_set_alloc_block_callback(ctx->fs, e2fsck_get_alloc_block, 0);
4424         ext2fs_set_block_alloc_stats_callback(ctx->fs,
4425                                                 e2fsck_block_alloc_stats, 0);
4426         ext2fs_set_new_range_callback(ctx->fs, e2fsck_new_range, NULL);
4427         ext2fs_set_block_alloc_stats_range_callback(ctx->fs,
4428                                         e2fsck_block_alloc_stats_range, NULL);
4429 }