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 static int e2fsck_should_abort(e2fsck_t ctx)
1153 {
1154         e2fsck_t global_ctx;
1155
1156         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1157                 return 1;
1158
1159         if (ctx->global_ctx) {
1160                 global_ctx = ctx->global_ctx;
1161                 if (global_ctx->flags & E2F_FLAG_SIGNAL_MASK)
1162                         return 1;
1163         }
1164         return 0;
1165 }
1166
1167 void e2fsck_pass1_thread(e2fsck_t ctx)
1168 {
1169         int     i;
1170         __u64   max_sizes;
1171         ext2_filsys fs = ctx->fs;
1172         ext2_ino_t      ino = 0;
1173         struct ext2_inode *inode = NULL;
1174         ext2_inode_scan scan = NULL;
1175         char            *block_buf = NULL;
1176 #ifdef RESOURCE_TRACK
1177         struct resource_track   rtrack;
1178 #endif
1179         unsigned char   frag, fsize;
1180         struct          problem_context pctx;
1181         struct          scan_callback_struct scan_struct;
1182         struct ext2_super_block *sb = ctx->fs->super;
1183         const char      *old_op;
1184         const char      *eop_next_inode = _("getting next inode from scan");
1185         int             imagic_fs, extent_fs, inlinedata_fs, casefold_fs;
1186         int             low_dtime_check = 1;
1187         unsigned int    inode_size = EXT2_INODE_SIZE(fs->super);
1188         unsigned int    bufsize;
1189         int             failed_csum = 0;
1190         ext2_ino_t      ino_threshold = 0;
1191         dgrp_t          ra_group = 0;
1192         struct ea_quota ea_ibody_quota;
1193
1194         init_resource_track(&rtrack, ctx->fs->io);
1195         clear_problem_context(&pctx);
1196
1197         /* If we can do readahead, figure out how many groups to pull in. */
1198         if (!e2fsck_can_readahead(ctx->fs))
1199                 ctx->readahead_kb = 0;
1200         else if (ctx->readahead_kb == ~0ULL)
1201                 ctx->readahead_kb = e2fsck_guess_readahead(ctx->fs);
1202         pass1_readahead(ctx, &ra_group, &ino_threshold);
1203
1204         if (!(ctx->options & E2F_OPT_PREEN))
1205                 fix_problem(ctx, PR_1_PASS_HEADER, &pctx);
1206
1207         if (ext2fs_has_feature_dir_index(fs->super) &&
1208             !(ctx->options & E2F_OPT_NO)) {
1209                 if (ext2fs_u32_list_create(&ctx->dirs_to_hash, 50))
1210                         ctx->dirs_to_hash = 0;
1211         }
1212
1213 #ifdef MTRACE
1214         mtrace_print("Pass 1");
1215 #endif
1216
1217 #define EXT2_BPP(bits) (1ULL << ((bits) - 2))
1218
1219         for (i = EXT2_MIN_BLOCK_LOG_SIZE; i <= EXT2_MAX_BLOCK_LOG_SIZE; i++) {
1220                 max_sizes = EXT2_NDIR_BLOCKS + EXT2_BPP(i);
1221                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i);
1222                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i) * EXT2_BPP(i);
1223                 max_sizes = (max_sizes * (1UL << i));
1224                 ext2_max_sizes[i - EXT2_MIN_BLOCK_LOG_SIZE] = max_sizes;
1225         }
1226 #undef EXT2_BPP
1227
1228         imagic_fs = ext2fs_has_feature_imagic_inodes(sb);
1229         extent_fs = ext2fs_has_feature_extents(sb);
1230         inlinedata_fs = ext2fs_has_feature_inline_data(sb);
1231         casefold_fs = ext2fs_has_feature_casefold(sb);
1232
1233         /*
1234          * Allocate bitmaps structures
1235          */
1236         pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("in-use inode map"),
1237                                                     EXT2FS_BMAP64_RBTREE,
1238                                                     "inode_used_map",
1239                                                     &ctx->inode_used_map);
1240         if (pctx.errcode) {
1241                 pctx.num = 1;
1242                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1243                 ctx->flags |= E2F_FLAG_ABORT;
1244                 return;
1245         }
1246         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1247                         _("directory inode map"),
1248                         EXT2FS_BMAP64_AUTODIR,
1249                         "inode_dir_map", &ctx->inode_dir_map);
1250         if (pctx.errcode) {
1251                 pctx.num = 2;
1252                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1253                 ctx->flags |= E2F_FLAG_ABORT;
1254                 return;
1255         }
1256         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1257                         _("regular file inode map"), EXT2FS_BMAP64_RBTREE,
1258                         "inode_reg_map", &ctx->inode_reg_map);
1259         if (pctx.errcode) {
1260                 pctx.num = 6;
1261                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1262                 ctx->flags |= E2F_FLAG_ABORT;
1263                 return;
1264         }
1265         pctx.errcode = e2fsck_allocate_subcluster_bitmap(fs,
1266                         _("in-use block map"), EXT2FS_BMAP64_RBTREE,
1267                         "block_found_map", &ctx->block_found_map);
1268         if (pctx.errcode) {
1269                 pctx.num = 1;
1270                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1271                 ctx->flags |= E2F_FLAG_ABORT;
1272                 return;
1273         }
1274         pctx.errcode = e2fsck_allocate_block_bitmap(fs,
1275                         _("metadata block map"), EXT2FS_BMAP64_RBTREE,
1276                         "block_metadata_map", &ctx->block_metadata_map);
1277         if (pctx.errcode) {
1278                 pctx.num = 1;
1279                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1280                 ctx->flags |= E2F_FLAG_ABORT;
1281                 return;
1282         }
1283         if (casefold_fs) {
1284                 pctx.errcode =
1285                         e2fsck_allocate_inode_bitmap(fs,
1286                                                      _("inode casefold map"),
1287                                                      EXT2FS_BMAP64_RBTREE,
1288                                                      "inode_casefold_map",
1289                                                      &ctx->inode_casefold_map);
1290                 if (pctx.errcode) {
1291                         pctx.num = 1;
1292                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1293                         ctx->flags |= E2F_FLAG_ABORT;
1294                         return;
1295                 }
1296         }
1297         pctx.errcode = e2fsck_setup_icount(ctx, "inode_link_info", 0, NULL,
1298                                            &ctx->inode_link_info);
1299         if (pctx.errcode) {
1300                 fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
1301                 ctx->flags |= E2F_FLAG_ABORT;
1302                 return;
1303         }
1304         bufsize = inode_size;
1305         if (bufsize < sizeof(struct ext2_inode_large))
1306                 bufsize = sizeof(struct ext2_inode_large);
1307         inode = (struct ext2_inode *)
1308                 e2fsck_allocate_memory(ctx, bufsize, "scratch inode");
1309
1310         inodes_to_process = (struct process_inode_block *)
1311                 e2fsck_allocate_memory(ctx,
1312                                        (ctx->process_inode_size *
1313                                         sizeof(struct process_inode_block)),
1314                                        "array of inodes to process");
1315         process_inode_count = 0;
1316
1317         pctx.errcode = ext2fs_init_dblist(fs, 0);
1318         if (pctx.errcode) {
1319                 fix_problem(ctx, PR_1_ALLOCATE_DBCOUNT, &pctx);
1320                 ctx->flags |= E2F_FLAG_ABORT;
1321                 goto endit;
1322         }
1323
1324         /*
1325          * If the last orphan field is set, clear it, since the pass1
1326          * processing will automatically find and clear the orphans.
1327          * In the future, we may want to try using the last_orphan
1328          * linked list ourselves, but for now, we clear it so that the
1329          * ext3 mount code won't get confused.
1330          */
1331         if (!(ctx->options & E2F_OPT_READONLY)) {
1332                 if (fs->super->s_last_orphan) {
1333                         fs->super->s_last_orphan = 0;
1334                         ext2fs_mark_super_dirty(fs);
1335                 }
1336         }
1337
1338         mark_table_blocks(ctx);
1339         pctx.errcode = ext2fs_convert_subcluster_bitmap(fs,
1340                                                 &ctx->block_found_map);
1341         if (pctx.errcode) {
1342                 fix_problem(ctx, PR_1_CONVERT_SUBCLUSTER, &pctx);
1343                 ctx->flags |= E2F_FLAG_ABORT;
1344                 goto endit;
1345         }
1346         block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3,
1347                                                     "block interate buffer");
1348         if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
1349                 e2fsck_use_inode_shortcuts(ctx, 1);
1350         e2fsck_intercept_block_allocations(ctx);
1351         old_op = ehandler_operation(_("opening inode scan"));
1352         pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks,
1353                                               &scan);
1354         ehandler_operation(old_op);
1355         if (pctx.errcode) {
1356                 fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1357                 ctx->flags |= E2F_FLAG_ABORT;
1358                 goto endit;
1359         }
1360         ext2fs_inode_scan_flags(scan, EXT2_SF_SKIP_MISSING_ITABLE |
1361                                       EXT2_SF_WARN_GARBAGE_INODES, 0);
1362         ctx->stashed_inode = inode;
1363         scan_struct.ctx = ctx;
1364         scan_struct.block_buf = block_buf;
1365         ext2fs_set_inode_callback(scan, scan_callback, &scan_struct);
1366         if (ctx->progress && ((ctx->progress)(ctx, 1, 0,
1367                                               ctx->fs->group_desc_count)))
1368                 goto endit;
1369         if ((fs->super->s_wtime &&
1370              fs->super->s_wtime < fs->super->s_inodes_count) ||
1371             (fs->super->s_mtime &&
1372              fs->super->s_mtime < fs->super->s_inodes_count) ||
1373             (fs->super->s_mkfs_time &&
1374              fs->super->s_mkfs_time < fs->super->s_inodes_count))
1375                 low_dtime_check = 0;
1376
1377         if (ext2fs_has_feature_mmp(fs->super) &&
1378             fs->super->s_mmp_block > fs->super->s_first_data_block &&
1379             fs->super->s_mmp_block < ext2fs_blocks_count(fs->super))
1380                 ext2fs_mark_block_bitmap2(ctx->block_found_map,
1381                                           fs->super->s_mmp_block);
1382
1383         /* Set up ctx->lost_and_found if possible */
1384         (void) e2fsck_get_lost_and_found(ctx, 0);
1385
1386         while (1) {
1387                 if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
1388                         if (e2fsck_mmp_update(fs))
1389                                 fatal_error(ctx, 0);
1390                 }
1391                 old_op = ehandler_operation(eop_next_inode);
1392                 pctx.errcode = ext2fs_get_next_inode_full(scan, &ino,
1393                                                           inode, inode_size);
1394                 if (ino > ino_threshold)
1395                         pass1_readahead(ctx, &ra_group, &ino_threshold);
1396                 ehandler_operation(old_op);
1397                 if (e2fsck_should_abort(ctx))
1398                         goto endit;
1399                 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) {
1400                         /*
1401                          * If badblocks says badblocks is bad, offer to clear
1402                          * the list, update the in-core bb list, and restart
1403                          * the inode scan.
1404                          */
1405                         if (ino == EXT2_BAD_INO &&
1406                             fix_problem(ctx, PR_1_BADBLOCKS_IN_BADBLOCKS,
1407                                         &pctx)) {
1408                                 errcode_t err;
1409
1410                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1411                                 ext2fs_badblocks_list_free(ctx->fs->badblocks);
1412                                 ctx->fs->badblocks = NULL;
1413                                 err = ext2fs_read_bb_inode(ctx->fs,
1414                                                         &ctx->fs->badblocks);
1415                                 if (err) {
1416                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1417                                                     &pctx);
1418                                         ctx->flags |= E2F_FLAG_ABORT;
1419                                 } else
1420                                         ctx->flags |= E2F_FLAG_RESTART;
1421                                 goto endit;
1422                         }
1423                         if (!ctx->inode_bb_map)
1424                                 alloc_bb_map(ctx);
1425                         ext2fs_mark_inode_bitmap2(ctx->inode_bb_map, ino);
1426                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1427                         continue;
1428                 }
1429                 if (pctx.errcode &&
1430                     pctx.errcode != EXT2_ET_INODE_CSUM_INVALID &&
1431                     pctx.errcode != EXT2_ET_INODE_IS_GARBAGE) {
1432                         fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1433                         ctx->flags |= E2F_FLAG_ABORT;
1434                         goto endit;
1435                 }
1436                 if (!ino)
1437                         break;
1438                 pctx.ino = ino;
1439                 pctx.inode = inode;
1440                 ctx->stashed_ino = ino;
1441
1442                 /* Clear trashed inode? */
1443                 if (pctx.errcode == EXT2_ET_INODE_IS_GARBAGE &&
1444                     inode->i_links_count > 0 &&
1445                     fix_problem(ctx, PR_1_INODE_IS_GARBAGE, &pctx)) {
1446                         pctx.errcode = 0;
1447                         e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1448                 }
1449                 failed_csum = pctx.errcode != 0;
1450
1451                 /*
1452                  * Check for inodes who might have been part of the
1453                  * orphaned list linked list.  They should have gotten
1454                  * dealt with by now, unless the list had somehow been
1455                  * corrupted.
1456                  *
1457                  * FIXME: In the future, inodes which are still in use
1458                  * (and which are therefore) pending truncation should
1459                  * be handled specially.  Right now we just clear the
1460                  * dtime field, and the normal e2fsck handling of
1461                  * inodes where i_size and the inode blocks are
1462                  * inconsistent is to fix i_size, instead of releasing
1463                  * the extra blocks.  This won't catch the inodes that
1464                  * was at the end of the orphan list, but it's better
1465                  * than nothing.  The right answer is that there
1466                  * shouldn't be any bugs in the orphan list handling.  :-)
1467                  */
1468                 if (inode->i_dtime && low_dtime_check &&
1469                     inode->i_dtime < ctx->fs->super->s_inodes_count) {
1470                         if (fix_problem(ctx, PR_1_LOW_DTIME, &pctx)) {
1471                                 inode->i_dtime = inode->i_links_count ?
1472                                         0 : ctx->now;
1473                                 e2fsck_write_inode(ctx, ino, inode,
1474                                                    "pass1");
1475                                 failed_csum = 0;
1476                         }
1477                 }
1478
1479                 if (inode->i_links_count) {
1480                         pctx.errcode = ext2fs_icount_store(ctx->inode_link_info,
1481                                            ino, inode->i_links_count);
1482                         if (pctx.errcode) {
1483                                 pctx.num = inode->i_links_count;
1484                                 fix_problem(ctx, PR_1_ICOUNT_STORE, &pctx);
1485                                 ctx->flags |= E2F_FLAG_ABORT;
1486                                 goto endit;
1487                         }
1488                 } else if ((ino >= EXT2_FIRST_INODE(fs->super)) &&
1489                            !quota_inum_is_reserved(fs, ino)) {
1490                         if (!inode->i_dtime && inode->i_mode) {
1491                                 if (fix_problem(ctx,
1492                                             PR_1_ZERO_DTIME, &pctx)) {
1493                                         inode->i_dtime = ctx->now;
1494                                         e2fsck_write_inode(ctx, ino, inode,
1495                                                            "pass1");
1496                                         failed_csum = 0;
1497                                 }
1498                         }
1499                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1500                         continue;
1501                 }
1502
1503                 if ((inode->i_flags & EXT4_CASEFOLD_FL) &&
1504                     ((!LINUX_S_ISDIR(inode->i_mode) &&
1505                       fix_problem(ctx, PR_1_CASEFOLD_NONDIR, &pctx)) ||
1506                      (!casefold_fs &&
1507                       fix_problem(ctx, PR_1_CASEFOLD_FEATURE, &pctx)))) {
1508                         inode->i_flags &= ~EXT4_CASEFOLD_FL;
1509                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1510                 }
1511
1512                 /* Conflicting inlinedata/extents inode flags? */
1513                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
1514                     (inode->i_flags & EXT4_EXTENTS_FL)) {
1515                         int res = fix_inline_data_extents_file(ctx, ino, inode,
1516                                                                inode_size,
1517                                                                &pctx);
1518                         if (res < 0) {
1519                                 /* skip FINISH_INODE_LOOP */
1520                                 continue;
1521                         }
1522                 }
1523
1524                 /* Test for incorrect inline_data flags settings. */
1525                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && !inlinedata_fs &&
1526                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1527                         size_t size = 0;
1528
1529                         pctx.errcode = get_inline_data_ea_size(fs, ino, &size);
1530                         if (!pctx.errcode &&
1531                             fix_problem(ctx, PR_1_INLINE_DATA_FEATURE, &pctx)) {
1532                                 ext2fs_set_feature_inline_data(sb);
1533                                 ext2fs_mark_super_dirty(fs);
1534                                 inlinedata_fs = 1;
1535                         } else if (fix_problem(ctx, PR_1_INLINE_DATA_SET, &pctx)) {
1536                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1537                                 /* skip FINISH_INODE_LOOP */
1538                                 continue;
1539                         }
1540                 }
1541
1542                 /* Test for inline data flag but no attr */
1543                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && inlinedata_fs &&
1544                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1545                         size_t size = 0;
1546                         errcode_t err;
1547                         int flags;
1548
1549                         flags = fs->flags;
1550                         if (failed_csum)
1551                                 fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1552                         err = get_inline_data_ea_size(fs, ino, &size);
1553                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1554                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1555
1556                         switch (err) {
1557                         case 0:
1558                                 /* Everything is awesome... */
1559                                 break;
1560                         case EXT2_ET_BAD_EA_BLOCK_NUM:
1561                         case EXT2_ET_BAD_EA_HASH:
1562                         case EXT2_ET_BAD_EA_HEADER:
1563                         case EXT2_ET_EA_BAD_NAME_LEN:
1564                         case EXT2_ET_EA_BAD_VALUE_SIZE:
1565                         case EXT2_ET_EA_KEY_NOT_FOUND:
1566                         case EXT2_ET_EA_NO_SPACE:
1567                         case EXT2_ET_MISSING_EA_FEATURE:
1568                         case EXT2_ET_INLINE_DATA_CANT_ITERATE:
1569                         case EXT2_ET_INLINE_DATA_NO_BLOCK:
1570                         case EXT2_ET_INLINE_DATA_NO_SPACE:
1571                         case EXT2_ET_NO_INLINE_DATA:
1572                         case EXT2_ET_EXT_ATTR_CSUM_INVALID:
1573                         case EXT2_ET_EA_BAD_VALUE_OFFSET:
1574                         case EXT2_ET_EA_INODE_CORRUPTED:
1575                                 /* broken EA or no system.data EA; truncate */
1576                                 if (fix_problem(ctx, PR_1_INLINE_DATA_NO_ATTR,
1577                                                 &pctx)) {
1578                                         err = ext2fs_inode_size_set(fs, inode, 0);
1579                                         if (err) {
1580                                                 pctx.errcode = err;
1581                                                 ctx->flags |= E2F_FLAG_ABORT;
1582                                                 goto endit;
1583                                         }
1584                                         inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1585                                         memset(&inode->i_block, 0,
1586                                                sizeof(inode->i_block));
1587                                         e2fsck_write_inode(ctx, ino, inode,
1588                                                            "pass1");
1589                                         failed_csum = 0;
1590                                 }
1591                                 break;
1592                         default:
1593                                 /* Some other kind of non-xattr error? */
1594                                 pctx.errcode = err;
1595                                 ctx->flags |= E2F_FLAG_ABORT;
1596                                 goto endit;
1597                         }
1598                 }
1599
1600                 /*
1601                  * Test for incorrect extent flag settings.
1602                  *
1603                  * On big-endian machines we must be careful:
1604                  * When the inode is read, the i_block array is not swapped
1605                  * if the extent flag is set.  Therefore if we are testing
1606                  * for or fixing a wrongly-set flag, we must potentially
1607                  * (un)swap before testing, or after fixing.
1608                  */
1609
1610                 /*
1611                  * In this case the extents flag was set when read, so
1612                  * extent_header_verify is ok.  If the inode is cleared,
1613                  * no need to swap... so no extra swapping here.
1614                  */
1615                 if ((inode->i_flags & EXT4_EXTENTS_FL) && !extent_fs &&
1616                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1617                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO))) {
1618                         if ((ext2fs_extent_header_verify(inode->i_block,
1619                                                  sizeof(inode->i_block)) == 0) &&
1620                             fix_problem(ctx, PR_1_EXTENT_FEATURE, &pctx)) {
1621                                 ext2fs_set_feature_extents(sb);
1622                                 ext2fs_mark_super_dirty(fs);
1623                                 extent_fs = 1;
1624                         } else if (fix_problem(ctx, PR_1_EXTENTS_SET, &pctx)) {
1625                         clear_inode:
1626                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1627                                 if (ino == EXT2_BAD_INO)
1628                                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map,
1629                                                                  ino);
1630                                 /* skip FINISH_INODE_LOOP */
1631                                 continue;
1632                         }
1633                 }
1634
1635                 /*
1636                  * For big-endian machines:
1637                  * If the inode didn't have the extents flag set when it
1638                  * was read, then the i_blocks array was swapped.  To test
1639                  * as an extents header, we must swap it back first.
1640                  * IF we then set the extents flag, the entire i_block
1641                  * array must be un/re-swapped to make it proper extents data.
1642                  */
1643                 if (extent_fs && !(inode->i_flags & EXT4_EXTENTS_FL) &&
1644                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1645                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO)) &&
1646                     (LINUX_S_ISREG(inode->i_mode) ||
1647                      LINUX_S_ISDIR(inode->i_mode))) {
1648                         void *ehp;
1649 #ifdef WORDS_BIGENDIAN
1650                         __u32 tmp_block[EXT2_N_BLOCKS];
1651
1652                         for (i = 0; i < EXT2_N_BLOCKS; i++)
1653                                 tmp_block[i] = ext2fs_swab32(inode->i_block[i]);
1654                         ehp = tmp_block;
1655 #else
1656                         ehp = inode->i_block;
1657 #endif
1658                         if ((ext2fs_extent_header_verify(ehp,
1659                                          sizeof(inode->i_block)) == 0) &&
1660                             (fix_problem(ctx, PR_1_UNSET_EXTENT_FL, &pctx))) {
1661                                 inode->i_flags |= EXT4_EXTENTS_FL;
1662 #ifdef WORDS_BIGENDIAN
1663                                 memcpy(inode->i_block, tmp_block,
1664                                        sizeof(inode->i_block));
1665 #endif
1666                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1667                                 failed_csum = 0;
1668                         }
1669                 }
1670
1671                 if (ino == EXT2_BAD_INO) {
1672                         struct process_block_struct pb;
1673
1674                         if ((failed_csum || inode->i_mode || inode->i_uid ||
1675                              inode->i_gid || inode->i_links_count ||
1676                              (inode->i_flags & EXT4_INLINE_DATA_FL) ||
1677                              inode->i_file_acl) &&
1678                             fix_problem(ctx, PR_1_INVALID_BAD_INODE, &pctx)) {
1679                                 memset(inode, 0, sizeof(struct ext2_inode));
1680                                 e2fsck_write_inode(ctx, ino, inode,
1681                                                    "clear bad inode");
1682                                 failed_csum = 0;
1683                         }
1684
1685                         pctx.errcode = ext2fs_copy_bitmap(ctx->block_found_map,
1686                                                           &pb.fs_meta_blocks);
1687                         if (pctx.errcode) {
1688                                 pctx.num = 4;
1689                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1690                                 ctx->flags |= E2F_FLAG_ABORT;
1691                                 goto endit;
1692                         }
1693                         pb.ino = EXT2_BAD_INO;
1694                         pb.num_blocks = pb.last_block = 0;
1695                         pb.last_db_block = -1;
1696                         pb.num_illegal_blocks = 0;
1697                         pb.suppress = 0; pb.clear = 0; pb.is_dir = 0;
1698                         pb.is_reg = 0; pb.fragmented = 0; pb.bbcheck = 0;
1699                         pb.inode = inode;
1700                         pb.pctx = &pctx;
1701                         pb.ctx = ctx;
1702                         pctx.errcode = ext2fs_block_iterate3(fs, ino, 0,
1703                                      block_buf, process_bad_block, &pb);
1704                         ext2fs_free_block_bitmap(pb.fs_meta_blocks);
1705                         if (pctx.errcode) {
1706                                 fix_problem(ctx, PR_1_BLOCK_ITERATE, &pctx);
1707                                 ctx->flags |= E2F_FLAG_ABORT;
1708                                 goto endit;
1709                         }
1710                         if (pb.bbcheck)
1711                                 if (!fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK_PROMPT, &pctx)) {
1712                                 ctx->flags |= E2F_FLAG_ABORT;
1713                                 goto endit;
1714                         }
1715                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1716                         clear_problem_context(&pctx);
1717                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1718                         continue;
1719                 } else if (ino == EXT2_ROOT_INO) {
1720                         /*
1721                          * Make sure the root inode is a directory; if
1722                          * not, offer to clear it.  It will be
1723                          * regenerated in pass #3.
1724                          */
1725                         if (!LINUX_S_ISDIR(inode->i_mode)) {
1726                                 if (fix_problem(ctx, PR_1_ROOT_NO_DIR, &pctx))
1727                                         goto clear_inode;
1728                         }
1729                         /*
1730                          * If dtime is set, offer to clear it.  mke2fs
1731                          * version 0.2b created filesystems with the
1732                          * dtime field set for the root and lost+found
1733                          * directories.  We won't worry about
1734                          * /lost+found, since that can be regenerated
1735                          * easily.  But we will fix the root directory
1736                          * as a special case.
1737                          */
1738                         if (inode->i_dtime && inode->i_links_count) {
1739                                 if (fix_problem(ctx, PR_1_ROOT_DTIME, &pctx)) {
1740                                         inode->i_dtime = 0;
1741                                         e2fsck_write_inode(ctx, ino, inode,
1742                                                            "pass1");
1743                                         failed_csum = 0;
1744                                 }
1745                         }
1746                 } else if (ino == EXT2_JOURNAL_INO) {
1747                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1748                         if (fs->super->s_journal_inum == EXT2_JOURNAL_INO) {
1749                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1750                                     fix_problem(ctx, PR_1_JOURNAL_BAD_MODE,
1751                                                 &pctx)) {
1752                                         inode->i_mode = LINUX_S_IFREG;
1753                                         e2fsck_write_inode(ctx, ino, inode,
1754                                                            "pass1");
1755                                         failed_csum = 0;
1756                                 }
1757                                 check_blocks(ctx, &pctx, block_buf, NULL);
1758                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1759                                 continue;
1760                         }
1761                         if ((inode->i_links_count ||
1762                              inode->i_blocks || inode->i_block[0]) &&
1763                             fix_problem(ctx, PR_1_JOURNAL_INODE_NOT_CLEAR,
1764                                         &pctx)) {
1765                                 memset(inode, 0, inode_size);
1766                                 ext2fs_icount_store(ctx->inode_link_info,
1767                                                     ino, 0);
1768                                 e2fsck_write_inode_full(ctx, ino, inode,
1769                                                         inode_size, "pass1");
1770                                 failed_csum = 0;
1771                         }
1772                 } else if (quota_inum_is_reserved(fs, ino)) {
1773                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1774                         if (ext2fs_has_feature_quota(fs->super) &&
1775                             quota_inum_is_super(fs->super, ino)) {
1776                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1777                                     fix_problem(ctx, PR_1_QUOTA_BAD_MODE,
1778                                                         &pctx)) {
1779                                         inode->i_mode = LINUX_S_IFREG;
1780                                         e2fsck_write_inode(ctx, ino, inode,
1781                                                         "pass1");
1782                                         failed_csum = 0;
1783                                 }
1784                                 check_blocks(ctx, &pctx, block_buf, NULL);
1785                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1786                                 continue;
1787                         }
1788                         if ((inode->i_links_count ||
1789                              inode->i_blocks || inode->i_block[0]) &&
1790                             fix_problem(ctx, PR_1_QUOTA_INODE_NOT_CLEAR,
1791                                         &pctx)) {
1792                                 memset(inode, 0, inode_size);
1793                                 ext2fs_icount_store(ctx->inode_link_info,
1794                                                     ino, 0);
1795                                 e2fsck_write_inode_full(ctx, ino, inode,
1796                                                         inode_size, "pass1");
1797                                 failed_csum = 0;
1798                         }
1799                 } else if (ino < EXT2_FIRST_INODE(fs->super)) {
1800                         problem_t problem = 0;
1801
1802                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1803                         if (ino == EXT2_BOOT_LOADER_INO) {
1804                                 if (LINUX_S_ISDIR(inode->i_mode))
1805                                         problem = PR_1_RESERVED_BAD_MODE;
1806                         } else if (ino == EXT2_RESIZE_INO) {
1807                                 if (inode->i_mode &&
1808                                     !LINUX_S_ISREG(inode->i_mode))
1809                                         problem = PR_1_RESERVED_BAD_MODE;
1810                         } else {
1811                                 if (inode->i_mode != 0)
1812                                         problem = PR_1_RESERVED_BAD_MODE;
1813                         }
1814                         if (problem) {
1815                                 if (fix_problem(ctx, problem, &pctx)) {
1816                                         inode->i_mode = 0;
1817                                         e2fsck_write_inode(ctx, ino, inode,
1818                                                            "pass1");
1819                                         failed_csum = 0;
1820                                 }
1821                         }
1822                         check_blocks(ctx, &pctx, block_buf, NULL);
1823                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1824                         continue;
1825                 }
1826
1827                 if (!inode->i_links_count) {
1828                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1829                         continue;
1830                 }
1831                 /*
1832                  * n.b.  0.3c ext2fs code didn't clear i_links_count for
1833                  * deleted files.  Oops.
1834                  *
1835                  * Since all new ext2 implementations get this right,
1836                  * we now assume that the case of non-zero
1837                  * i_links_count and non-zero dtime means that we
1838                  * should keep the file, not delete it.
1839                  *
1840                  */
1841                 if (inode->i_dtime) {
1842                         if (fix_problem(ctx, PR_1_SET_DTIME, &pctx)) {
1843                                 inode->i_dtime = 0;
1844                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1845                                 failed_csum = 0;
1846                         }
1847                 }
1848
1849                 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1850                 switch (fs->super->s_creator_os) {
1851                     case EXT2_OS_HURD:
1852                         frag = inode->osd2.hurd2.h_i_frag;
1853                         fsize = inode->osd2.hurd2.h_i_fsize;
1854                         break;
1855                     default:
1856                         frag = fsize = 0;
1857                 }
1858
1859                 if (inode->i_faddr || frag || fsize ||
1860                     (!ext2fs_has_feature_largedir(fs->super) &&
1861                     (LINUX_S_ISDIR(inode->i_mode) && inode->i_size_high)))
1862                         mark_inode_bad(ctx, ino);
1863                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1864                     !ext2fs_has_feature_64bit(fs->super) &&
1865                     inode->osd2.linux2.l_i_file_acl_high != 0)
1866                         mark_inode_bad(ctx, ino);
1867                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1868                     !ext2fs_has_feature_huge_file(fs->super) &&
1869                     (inode->osd2.linux2.l_i_blocks_hi != 0))
1870                         mark_inode_bad(ctx, ino);
1871                 if (inode->i_flags & EXT2_IMAGIC_FL) {
1872                         if (imagic_fs) {
1873                                 if (!ctx->inode_imagic_map)
1874                                         alloc_imagic_map(ctx);
1875                                 ext2fs_mark_inode_bitmap2(ctx->inode_imagic_map,
1876                                                          ino);
1877                         } else {
1878                                 if (fix_problem(ctx, PR_1_SET_IMAGIC, &pctx)) {
1879                                         inode->i_flags &= ~EXT2_IMAGIC_FL;
1880                                         e2fsck_write_inode(ctx, ino,
1881                                                            inode, "pass1");
1882                                         failed_csum = 0;
1883                                 }
1884                         }
1885                 }
1886
1887                 check_inode_extra_space(ctx, &pctx, &ea_ibody_quota);
1888                 check_is_really_dir(ctx, &pctx, block_buf);
1889
1890                 /*
1891                  * ext2fs_inode_has_valid_blocks2 does not actually look
1892                  * at i_block[] values, so not endian-sensitive here.
1893                  */
1894                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL) &&
1895                     LINUX_S_ISLNK(inode->i_mode) &&
1896                     !ext2fs_inode_has_valid_blocks2(fs, inode) &&
1897                     fix_problem(ctx, PR_1_FAST_SYMLINK_EXTENT_FL, &pctx)) {
1898                         inode->i_flags &= ~EXT4_EXTENTS_FL;
1899                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1900                         failed_csum = 0;
1901                 }
1902
1903                 if ((inode->i_flags & EXT4_ENCRYPT_FL) &&
1904                     add_encrypted_file(ctx, &pctx) < 0)
1905                         goto clear_inode;
1906
1907                 if (casefold_fs && inode->i_flags & EXT4_CASEFOLD_FL)
1908                         ext2fs_mark_inode_bitmap2(ctx->inode_casefold_map, ino);
1909
1910                 if (LINUX_S_ISDIR(inode->i_mode)) {
1911                         ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
1912                         e2fsck_add_dir_info(ctx, ino, 0);
1913                         ctx->fs_directory_count++;
1914                         if (inode->i_flags & EXT4_CASEFOLD_FL)
1915                                 add_casefolded_dir(ctx, ino);
1916                 } else if (LINUX_S_ISREG (inode->i_mode)) {
1917                         ext2fs_mark_inode_bitmap2(ctx->inode_reg_map, ino);
1918                         ctx->fs_regular_count++;
1919                 } else if (LINUX_S_ISCHR (inode->i_mode) &&
1920                            e2fsck_pass1_check_device_inode(fs, inode)) {
1921                         check_extents_inlinedata(ctx, &pctx);
1922                         check_immutable(ctx, &pctx);
1923                         check_size(ctx, &pctx);
1924                         ctx->fs_chardev_count++;
1925                 } else if (LINUX_S_ISBLK (inode->i_mode) &&
1926                            e2fsck_pass1_check_device_inode(fs, inode)) {
1927                         check_extents_inlinedata(ctx, &pctx);
1928                         check_immutable(ctx, &pctx);
1929                         check_size(ctx, &pctx);
1930                         ctx->fs_blockdev_count++;
1931                 } else if (LINUX_S_ISLNK (inode->i_mode) &&
1932                            e2fsck_pass1_check_symlink(fs, ino, inode,
1933                                                       block_buf)) {
1934                         check_immutable(ctx, &pctx);
1935                         ctx->fs_symlinks_count++;
1936                         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
1937                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1938                                 continue;
1939                         } else if (ext2fs_is_fast_symlink(inode)) {
1940                                 ctx->fs_fast_symlinks_count++;
1941                                 check_blocks(ctx, &pctx, block_buf,
1942                                              &ea_ibody_quota);
1943                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1944                                 continue;
1945                         }
1946                 }
1947                 else if (LINUX_S_ISFIFO (inode->i_mode) &&
1948                          e2fsck_pass1_check_device_inode(fs, inode)) {
1949                         check_extents_inlinedata(ctx, &pctx);
1950                         check_immutable(ctx, &pctx);
1951                         check_size(ctx, &pctx);
1952                         ctx->fs_fifo_count++;
1953                 } else if ((LINUX_S_ISSOCK (inode->i_mode)) &&
1954                            e2fsck_pass1_check_device_inode(fs, inode)) {
1955                         check_extents_inlinedata(ctx, &pctx);
1956                         check_immutable(ctx, &pctx);
1957                         check_size(ctx, &pctx);
1958                         ctx->fs_sockets_count++;
1959                 } else
1960                         mark_inode_bad(ctx, ino);
1961                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1962                     !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
1963                         if (inode->i_block[EXT2_IND_BLOCK])
1964                                 ctx->fs_ind_count++;
1965                         if (inode->i_block[EXT2_DIND_BLOCK])
1966                                 ctx->fs_dind_count++;
1967                         if (inode->i_block[EXT2_TIND_BLOCK])
1968                                 ctx->fs_tind_count++;
1969                 }
1970                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1971                     !(inode->i_flags & EXT4_INLINE_DATA_FL) &&
1972                     (inode->i_block[EXT2_IND_BLOCK] ||
1973                      inode->i_block[EXT2_DIND_BLOCK] ||
1974                      inode->i_block[EXT2_TIND_BLOCK] ||
1975                      ext2fs_file_acl_block(fs, inode))) {
1976                         struct process_inode_block *itp;
1977
1978                         itp = &inodes_to_process[process_inode_count];
1979                         itp->ino = ino;
1980                         itp->ea_ibody_quota = ea_ibody_quota;
1981                         if (inode_size < sizeof(struct ext2_inode_large))
1982                                 memcpy(&itp->inode, inode, inode_size);
1983                         else
1984                                 memcpy(&itp->inode, inode, sizeof(itp->inode));
1985                         process_inode_count++;
1986                 } else
1987                         check_blocks(ctx, &pctx, block_buf, &ea_ibody_quota);
1988
1989                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1990
1991                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1992                         goto endit;
1993
1994                 if (process_inode_count >= ctx->process_inode_size) {
1995                         process_inodes(ctx, block_buf);
1996
1997                         if (e2fsck_should_abort(ctx))
1998                                 goto endit;
1999                 }
2000         }
2001         process_inodes(ctx, block_buf);
2002         ext2fs_close_inode_scan(scan);
2003         scan = NULL;
2004
2005         reserve_block_for_root_repair(ctx);
2006         reserve_block_for_lnf_repair(ctx);
2007
2008         /*
2009          * If any extended attribute blocks' reference counts need to
2010          * be adjusted, either up (ctx->refcount_extra), or down
2011          * (ctx->refcount), then fix them.
2012          */
2013         if (ctx->refcount) {
2014                 adjust_extattr_refcount(ctx, ctx->refcount, block_buf, -1);
2015                 ea_refcount_free(ctx->refcount);
2016                 ctx->refcount = 0;
2017         }
2018         if (ctx->refcount_extra) {
2019                 adjust_extattr_refcount(ctx, ctx->refcount_extra,
2020                                         block_buf, +1);
2021                 ea_refcount_free(ctx->refcount_extra);
2022                 ctx->refcount_extra = 0;
2023         }
2024
2025         if (ctx->ea_block_quota_blocks) {
2026                 ea_refcount_free(ctx->ea_block_quota_blocks);
2027                 ctx->ea_block_quota_blocks = 0;
2028         }
2029
2030         if (ctx->ea_block_quota_inodes) {
2031                 ea_refcount_free(ctx->ea_block_quota_inodes);
2032                 ctx->ea_block_quota_inodes = 0;
2033         }
2034
2035         if (ctx->invalid_bitmaps)
2036                 handle_fs_bad_blocks(ctx);
2037
2038         /* We don't need the block_ea_map any more */
2039         if (ctx->block_ea_map) {
2040                 ext2fs_free_block_bitmap(ctx->block_ea_map);
2041                 ctx->block_ea_map = 0;
2042         }
2043
2044         /* We don't need the encryption policy => ID map any more */
2045         destroy_encryption_policy_map(ctx);
2046
2047         if (ctx->flags & E2F_FLAG_RESIZE_INODE) {
2048                 clear_problem_context(&pctx);
2049                 pctx.errcode = ext2fs_create_resize_inode(fs);
2050                 if (pctx.errcode) {
2051                         if (!fix_problem(ctx, PR_1_RESIZE_INODE_CREATE,
2052                                          &pctx)) {
2053                                 ctx->flags |= E2F_FLAG_ABORT;
2054                                 goto endit;
2055                         }
2056                         pctx.errcode = 0;
2057                 }
2058                 if (!pctx.errcode) {
2059                         e2fsck_read_inode(ctx, EXT2_RESIZE_INO, inode,
2060                                           "recreate inode");
2061                         inode->i_mtime = ctx->now;
2062                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, inode,
2063                                            "recreate inode");
2064                 }
2065                 ctx->flags &= ~E2F_FLAG_RESIZE_INODE;
2066         }
2067
2068         if (ctx->flags & E2F_FLAG_RESTART) {
2069                 /*
2070                  * Only the master copy of the superblock and block
2071                  * group descriptors are going to be written during a
2072                  * restart, so set the superblock to be used to be the
2073                  * master superblock.
2074                  */
2075                 ctx->use_superblock = 0;
2076                 goto endit;
2077         }
2078
2079         if (ctx->large_dirs && !ext2fs_has_feature_largedir(fs->super)) {
2080                 if (fix_problem(ctx, PR_2_FEATURE_LARGE_DIRS, &pctx)) {
2081                         ext2fs_set_feature_largedir(fs->super);
2082                         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2083                         ext2fs_mark_super_dirty(fs);
2084                 }
2085                 if (fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
2086                     fix_problem(ctx, PR_1_FS_REV_LEVEL, &pctx)) {
2087                         ext2fs_update_dynamic_rev(fs);
2088                         ext2fs_mark_super_dirty(fs);
2089                 }
2090         }
2091
2092         if (ctx->block_dup_map) {
2093                 if (ctx->options & E2F_OPT_PREEN) {
2094                         clear_problem_context(&pctx);
2095                         fix_problem(ctx, PR_1_DUP_BLOCKS_PREENSTOP, &pctx);
2096                 }
2097                 e2fsck_pass1_dupblocks(ctx, block_buf);
2098         }
2099         ctx->flags |= E2F_FLAG_ALLOC_OK;
2100 endit:
2101         e2fsck_use_inode_shortcuts(ctx, 0);
2102         ext2fs_free_mem(&inodes_to_process);
2103         inodes_to_process = 0;
2104
2105         if (scan)
2106                 ext2fs_close_inode_scan(scan);
2107         if (block_buf)
2108                 ext2fs_free_mem(&block_buf);
2109         if (inode)
2110                 ext2fs_free_mem(&inode);
2111
2112         /*
2113          * The l+f inode may have been cleared, so zap it now and
2114          * later passes will recalculate it if necessary
2115          */
2116         ctx->lost_and_found = 0;
2117
2118         if ((ctx->flags & E2F_FLAG_SIGNAL_MASK) == 0)
2119                 print_resource_track(ctx, _("Pass 1"), &rtrack, ctx->fs->io);
2120         else
2121                 ctx->invalid_bitmaps++;
2122 }
2123
2124 static errcode_t e2fsck_pass1_thread_prepare(e2fsck_t global_ctx, e2fsck_t *thread_ctx)
2125 {
2126         errcode_t       retval;
2127         e2fsck_t        thread_context;
2128
2129         retval = ext2fs_get_mem(sizeof(struct e2fsck_struct), &thread_context);
2130         if (retval) {
2131                 com_err(global_ctx->program_name, retval, "while allocating memory");
2132                 return retval;
2133         }
2134         memcpy(thread_context, global_ctx, sizeof(struct e2fsck_struct));
2135         thread_context->fs->priv_data = thread_context;
2136         thread_context->global_ctx = global_ctx;
2137
2138         *thread_ctx = thread_context;
2139         return 0;
2140 }
2141
2142 static int e2fsck_pass1_thread_join(e2fsck_t global_ctx, e2fsck_t thread_ctx)
2143 {
2144         int     flags = global_ctx->flags;
2145 #ifdef HAVE_SETJMP_H
2146         jmp_buf old_jmp;
2147
2148         memcpy(old_jmp, global_ctx->abort_loc, sizeof(jmp_buf));
2149 #endif
2150         memcpy(global_ctx, thread_ctx, sizeof(struct e2fsck_struct));
2151 #ifdef HAVE_SETJMP_H
2152         memcpy(global_ctx->abort_loc, old_jmp, sizeof(jmp_buf));
2153 #endif
2154         /* Keep the global singal flags*/
2155         global_ctx->flags |= (flags & E2F_FLAG_SIGNAL_MASK) |
2156                              (global_ctx->flags & E2F_FLAG_SIGNAL_MASK);
2157
2158         global_ctx->fs->priv_data = global_ctx;
2159         ext2fs_free_mem(&thread_ctx);
2160         return 0;
2161 }
2162
2163 void e2fsck_pass1_multithread(e2fsck_t ctx)
2164 {
2165         errcode_t       retval;
2166         e2fsck_t        thread_ctx;
2167
2168         retval = e2fsck_pass1_thread_prepare(ctx, &thread_ctx);
2169         if (retval) {
2170                 com_err(ctx->program_name, 0,
2171                         _("while preparing pass1 thread\n"));
2172                 ctx->flags |= E2F_FLAG_ABORT;
2173                 return;
2174         }
2175
2176 #ifdef HAVE_SETJMP_H
2177         /*
2178          * When fatal_error() happens, jump to here. The thread
2179          * context's flags will be saved, but its abort_loc will
2180          * be overwritten by original jump buffer for the later
2181          * tests.
2182          */
2183         if (setjmp(thread_ctx->abort_loc)) {
2184                 thread_ctx->flags &= ~E2F_FLAG_SETJMP_OK;
2185                 e2fsck_pass1_thread_join(ctx, thread_ctx);
2186                 return;
2187         }
2188         thread_ctx->flags |= E2F_FLAG_SETJMP_OK;
2189 #endif
2190
2191         e2fsck_pass1_thread(thread_ctx);
2192         retval = e2fsck_pass1_thread_join(ctx, thread_ctx);
2193         if (retval) {
2194                 com_err(ctx->program_name, 0,
2195                         _("while joining pass1 thread\n"));
2196                 ctx->flags |= E2F_FLAG_ABORT;
2197                 return;
2198         }
2199 }
2200
2201 void e2fsck_pass1(e2fsck_t ctx)
2202 {
2203         e2fsck_pass1_multithread(ctx);
2204 }
2205
2206 #undef FINISH_INODE_LOOP
2207
2208 /*
2209  * When the inode_scan routines call this callback at the end of the
2210  * glock group, call process_inodes.
2211  */
2212 static errcode_t scan_callback(ext2_filsys fs,
2213                                ext2_inode_scan scan EXT2FS_ATTR((unused)),
2214                                dgrp_t group, void * priv_data)
2215 {
2216         struct scan_callback_struct *scan_struct;
2217         e2fsck_t ctx;
2218
2219         scan_struct = (struct scan_callback_struct *) priv_data;
2220         ctx = scan_struct->ctx;
2221
2222         process_inodes((e2fsck_t) fs->priv_data, scan_struct->block_buf);
2223
2224         if (ctx->progress)
2225                 if ((ctx->progress)(ctx, 1, group+1,
2226                                     ctx->fs->group_desc_count))
2227                         return EXT2_ET_CANCEL_REQUESTED;
2228
2229         return 0;
2230 }
2231
2232 /*
2233  * Process the inodes in the "inodes to process" list.
2234  */
2235 static void process_inodes(e2fsck_t ctx, char *block_buf)
2236 {
2237         int                     i;
2238         struct ext2_inode       *old_stashed_inode;
2239         ext2_ino_t              old_stashed_ino;
2240         const char              *old_operation;
2241         char                    buf[80];
2242         struct problem_context  pctx;
2243
2244 #if 0
2245         printf("begin process_inodes: ");
2246 #endif
2247         if (process_inode_count == 0)
2248                 return;
2249         old_operation = ehandler_operation(0);
2250         old_stashed_inode = ctx->stashed_inode;
2251         old_stashed_ino = ctx->stashed_ino;
2252         qsort(inodes_to_process, process_inode_count,
2253                       sizeof(struct process_inode_block), process_inode_cmp);
2254         clear_problem_context(&pctx);
2255         for (i=0; i < process_inode_count; i++) {
2256                 pctx.inode = ctx->stashed_inode =
2257                         (struct ext2_inode *) &inodes_to_process[i].inode;
2258                 pctx.ino = ctx->stashed_ino = inodes_to_process[i].ino;
2259
2260 #if 0
2261                 printf("%u ", pctx.ino);
2262 #endif
2263                 sprintf(buf, _("reading indirect blocks of inode %u"),
2264                         pctx.ino);
2265                 ehandler_operation(buf);
2266                 check_blocks(ctx, &pctx, block_buf,
2267                              &inodes_to_process[i].ea_ibody_quota);
2268                 if (e2fsck_should_abort(ctx))
2269                         break;
2270         }
2271         ctx->stashed_inode = old_stashed_inode;
2272         ctx->stashed_ino = old_stashed_ino;
2273         process_inode_count = 0;
2274 #if 0
2275         printf("end process inodes\n");
2276 #endif
2277         ehandler_operation(old_operation);
2278 }
2279
2280 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b)
2281 {
2282         const struct process_inode_block *ib_a =
2283                 (const struct process_inode_block *) a;
2284         const struct process_inode_block *ib_b =
2285                 (const struct process_inode_block *) b;
2286         int     ret;
2287
2288         ret = (ib_a->inode.i_block[EXT2_IND_BLOCK] -
2289                ib_b->inode.i_block[EXT2_IND_BLOCK]);
2290         if (ret == 0)
2291                 /*
2292                  * We only call process_inodes() for non-extent
2293                  * inodes, so it's OK to pass NULL to
2294                  * ext2fs_file_acl_block() here.
2295                  */
2296                 ret = ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_a->inode)) -
2297                         ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_b->inode));
2298         if (ret == 0)
2299                 ret = ib_a->ino - ib_b->ino;
2300         return ret;
2301 }
2302
2303 /*
2304  * Mark an inode as being bad in some what
2305  */
2306 static void mark_inode_bad(e2fsck_t ctx, ino_t ino)
2307 {
2308         struct          problem_context pctx;
2309
2310         if (!ctx->inode_bad_map) {
2311                 clear_problem_context(&pctx);
2312
2313                 pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2314                                 _("bad inode map"), EXT2FS_BMAP64_RBTREE,
2315                                 "inode_bad_map", &ctx->inode_bad_map);
2316                 if (pctx.errcode) {
2317                         pctx.num = 3;
2318                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2319                         /* Should never get here */
2320                         ctx->flags |= E2F_FLAG_ABORT;
2321                         return;
2322                 }
2323         }
2324         ext2fs_mark_inode_bitmap2(ctx->inode_bad_map, ino);
2325 }
2326
2327 static void add_casefolded_dir(e2fsck_t ctx, ino_t ino)
2328 {
2329         struct          problem_context pctx;
2330
2331         if (!ctx->casefolded_dirs) {
2332                 pctx.errcode = ext2fs_u32_list_create(&ctx->casefolded_dirs, 0);
2333                 if (pctx.errcode)
2334                         goto error;
2335         }
2336         pctx.errcode = ext2fs_u32_list_add(ctx->casefolded_dirs, ino);
2337         if (pctx.errcode == 0)
2338                 return;
2339 error:
2340         fix_problem(ctx, PR_1_ALLOCATE_CASEFOLDED_DIRLIST, &pctx);
2341         /* Should never get here */
2342         ctx->flags |= E2F_FLAG_ABORT;
2343 }
2344
2345 /*
2346  * This procedure will allocate the inode "bb" (badblock) map table
2347  */
2348 static void alloc_bb_map(e2fsck_t ctx)
2349 {
2350         struct          problem_context pctx;
2351
2352         clear_problem_context(&pctx);
2353         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2354                         _("inode in bad block map"), EXT2FS_BMAP64_RBTREE,
2355                         "inode_bb_map", &ctx->inode_bb_map);
2356         if (pctx.errcode) {
2357                 pctx.num = 4;
2358                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2359                 /* Should never get here */
2360                 ctx->flags |= E2F_FLAG_ABORT;
2361                 return;
2362         }
2363 }
2364
2365 /*
2366  * This procedure will allocate the inode imagic table
2367  */
2368 static void alloc_imagic_map(e2fsck_t ctx)
2369 {
2370         struct          problem_context pctx;
2371
2372         clear_problem_context(&pctx);
2373         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2374                         _("imagic inode map"), EXT2FS_BMAP64_RBTREE,
2375                         "inode_imagic_map", &ctx->inode_imagic_map);
2376         if (pctx.errcode) {
2377                 pctx.num = 5;
2378                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2379                 /* Should never get here */
2380                 ctx->flags |= E2F_FLAG_ABORT;
2381                 return;
2382         }
2383 }
2384
2385 /*
2386  * Marks a block as in use, setting the dup_map if it's been set
2387  * already.  Called by process_block and process_bad_block.
2388  *
2389  * WARNING: Assumes checks have already been done to make sure block
2390  * is valid.  This is true in both process_block and process_bad_block.
2391  */
2392 static _INLINE_ void mark_block_used(e2fsck_t ctx, blk64_t block)
2393 {
2394         struct          problem_context pctx;
2395
2396         clear_problem_context(&pctx);
2397
2398         if (ext2fs_fast_test_block_bitmap2(ctx->block_found_map, block)) {
2399                 if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2400                     !(ctx->options & E2F_OPT_UNSHARE_BLOCKS)) {
2401                         return;
2402                 }
2403                 if (!ctx->block_dup_map) {
2404                         pctx.errcode = e2fsck_allocate_block_bitmap(ctx->fs,
2405                                         _("multiply claimed block map"),
2406                                         EXT2FS_BMAP64_RBTREE, "block_dup_map",
2407                                         &ctx->block_dup_map);
2408                         if (pctx.errcode) {
2409                                 pctx.num = 3;
2410                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR,
2411                                             &pctx);
2412                                 /* Should never get here */
2413                                 ctx->flags |= E2F_FLAG_ABORT;
2414                                 return;
2415                         }
2416                 }
2417                 ext2fs_fast_mark_block_bitmap2(ctx->block_dup_map, block);
2418         } else {
2419                 ext2fs_fast_mark_block_bitmap2(ctx->block_found_map, block);
2420         }
2421 }
2422
2423 /*
2424  * When cluster size is greater than one block, it is caller's responsibility
2425  * to make sure block parameter starts at a cluster boundary.
2426  */
2427 static _INLINE_ void mark_blocks_used(e2fsck_t ctx, blk64_t block,
2428                                       unsigned int num)
2429 {
2430         if (ext2fs_test_block_bitmap_range2(ctx->block_found_map, block, num))
2431                 ext2fs_mark_block_bitmap_range2(ctx->block_found_map, block, num);
2432         else {
2433                 unsigned int i;
2434
2435                 for (i = 0; i < num; i += EXT2FS_CLUSTER_RATIO(ctx->fs))
2436                         mark_block_used(ctx, block + i);
2437         }
2438 }
2439
2440 /*
2441  * Adjust the extended attribute block's reference counts at the end
2442  * of pass 1, either by subtracting out references for EA blocks that
2443  * are still referenced in ctx->refcount, or by adding references for
2444  * EA blocks that had extra references as accounted for in
2445  * ctx->refcount_extra.
2446  */
2447 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
2448                                     char *block_buf, int adjust_sign)
2449 {
2450         struct ext2_ext_attr_header     *header;
2451         struct problem_context          pctx;
2452         ext2_filsys                     fs = ctx->fs;
2453         blk64_t                         blk;
2454         __u32                           should_be;
2455         ea_value_t                      count;
2456
2457         clear_problem_context(&pctx);
2458
2459         ea_refcount_intr_begin(refcount);
2460         while (1) {
2461                 if ((blk = ea_refcount_intr_next(refcount, &count)) == 0)
2462                         break;
2463                 pctx.blk = blk;
2464                 pctx.errcode = ext2fs_read_ext_attr3(fs, blk, block_buf,
2465                                                      pctx.ino);
2466                 if (pctx.errcode) {
2467                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
2468                         return;
2469                 }
2470                 header = (struct ext2_ext_attr_header *) block_buf;
2471                 pctx.blkcount = header->h_refcount;
2472                 should_be = header->h_refcount + adjust_sign * (int)count;
2473                 pctx.num = should_be;
2474                 if (fix_problem(ctx, PR_1_EXTATTR_REFCOUNT, &pctx)) {
2475                         header->h_refcount = should_be;
2476                         pctx.errcode = ext2fs_write_ext_attr3(fs, blk,
2477                                                              block_buf,
2478                                                              pctx.ino);
2479                         if (pctx.errcode) {
2480                                 fix_problem(ctx, PR_1_EXTATTR_WRITE_ABORT,
2481                                             &pctx);
2482                                 continue;
2483                         }
2484                 }
2485         }
2486 }
2487
2488 /*
2489  * Handle processing the extended attribute blocks
2490  */
2491 static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx,
2492                            char *block_buf, struct ea_quota *ea_block_quota)
2493 {
2494         ext2_filsys fs = ctx->fs;
2495         ext2_ino_t      ino = pctx->ino;
2496         struct ext2_inode *inode = pctx->inode;
2497         blk64_t         blk;
2498         char *          end;
2499         struct ext2_ext_attr_header *header;
2500         struct ext2_ext_attr_entry *first, *entry;
2501         blk64_t         quota_blocks = EXT2FS_C2B(fs, 1);
2502         __u64           quota_inodes = 0;
2503         region_t        region = 0;
2504         int             failed_csum = 0;
2505
2506         ea_block_quota->blocks = 0;
2507         ea_block_quota->inodes = 0;
2508
2509         blk = ext2fs_file_acl_block(fs, inode);
2510         if (blk == 0)
2511                 return 0;
2512
2513         /*
2514          * If the Extended attribute flag isn't set, then a non-zero
2515          * file acl means that the inode is corrupted.
2516          *
2517          * Or if the extended attribute block is an invalid block,
2518          * then the inode is also corrupted.
2519          */
2520         if (!ext2fs_has_feature_xattr(fs->super) ||
2521             (blk < fs->super->s_first_data_block) ||
2522             (blk >= ext2fs_blocks_count(fs->super))) {
2523                 mark_inode_bad(ctx, ino);
2524                 return 0;
2525         }
2526
2527         /* If ea bitmap hasn't been allocated, create it */
2528         if (!ctx->block_ea_map) {
2529                 pctx->errcode = e2fsck_allocate_block_bitmap(fs,
2530                                         _("ext attr block map"),
2531                                         EXT2FS_BMAP64_RBTREE, "block_ea_map",
2532                                         &ctx->block_ea_map);
2533                 if (pctx->errcode) {
2534                         pctx->num = 2;
2535                         fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, pctx);
2536                         ctx->flags |= E2F_FLAG_ABORT;
2537                         return 0;
2538                 }
2539         }
2540
2541         /* Create the EA refcount structure if necessary */
2542         if (!ctx->refcount) {
2543                 pctx->errcode = ea_refcount_create(0, &ctx->refcount);
2544                 if (pctx->errcode) {
2545                         pctx->num = 1;
2546                         fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2547                         ctx->flags |= E2F_FLAG_ABORT;
2548                         return 0;
2549                 }
2550         }
2551
2552 #if 0
2553         /* Debugging text */
2554         printf("Inode %u has EA block %u\n", ino, blk);
2555 #endif
2556
2557         /* Have we seen this EA block before? */
2558         if (ext2fs_fast_test_block_bitmap2(ctx->block_ea_map, blk)) {
2559                 ea_block_quota->blocks = EXT2FS_C2B(fs, 1);
2560                 ea_block_quota->inodes = 0;
2561
2562                 if (ctx->ea_block_quota_blocks) {
2563                         ea_refcount_fetch(ctx->ea_block_quota_blocks, blk,
2564                                           &quota_blocks);
2565                         if (quota_blocks)
2566                                 ea_block_quota->blocks = quota_blocks;
2567                 }
2568
2569                 if (ctx->ea_block_quota_inodes)
2570                         ea_refcount_fetch(ctx->ea_block_quota_inodes, blk,
2571                                           &ea_block_quota->inodes);
2572
2573                 if (ea_refcount_decrement(ctx->refcount, blk, 0) == 0)
2574                         return 1;
2575                 /* Ooops, this EA was referenced more than it stated */
2576                 if (!ctx->refcount_extra) {
2577                         pctx->errcode = ea_refcount_create(0,
2578                                            &ctx->refcount_extra);
2579                         if (pctx->errcode) {
2580                                 pctx->num = 2;
2581                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2582                                 ctx->flags |= E2F_FLAG_ABORT;
2583                                 return 0;
2584                         }
2585                 }
2586                 ea_refcount_increment(ctx->refcount_extra, blk, 0);
2587                 return 1;
2588         }
2589
2590         /*
2591          * OK, we haven't seen this EA block yet.  So we need to
2592          * validate it
2593          */
2594         pctx->blk = blk;
2595         pctx->errcode = ext2fs_read_ext_attr3(fs, blk, block_buf, pctx->ino);
2596         if (pctx->errcode == EXT2_ET_EXT_ATTR_CSUM_INVALID) {
2597                 pctx->errcode = 0;
2598                 failed_csum = 1;
2599         } else if (pctx->errcode == EXT2_ET_BAD_EA_HEADER)
2600                 pctx->errcode = 0;
2601
2602         if (pctx->errcode &&
2603             fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx)) {
2604                 pctx->errcode = 0;
2605                 goto clear_extattr;
2606         }
2607         header = (struct ext2_ext_attr_header *) block_buf;
2608         pctx->blk = ext2fs_file_acl_block(fs, inode);
2609         if (((ctx->ext_attr_ver == 1) &&
2610              (header->h_magic != EXT2_EXT_ATTR_MAGIC_v1)) ||
2611             ((ctx->ext_attr_ver == 2) &&
2612              (header->h_magic != EXT2_EXT_ATTR_MAGIC))) {
2613                 if (fix_problem(ctx, PR_1_BAD_EA_BLOCK, pctx))
2614                         goto clear_extattr;
2615         }
2616
2617         if (header->h_blocks != 1) {
2618                 if (fix_problem(ctx, PR_1_EA_MULTI_BLOCK, pctx))
2619                         goto clear_extattr;
2620         }
2621
2622         if (pctx->errcode && fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx))
2623                 goto clear_extattr;
2624
2625         region = region_create(0, fs->blocksize);
2626         if (!region) {
2627                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
2628                 ctx->flags |= E2F_FLAG_ABORT;
2629                 return 0;
2630         }
2631         if (region_allocate(region, 0, sizeof(struct ext2_ext_attr_header))) {
2632                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2633                         goto clear_extattr;
2634         }
2635
2636         first = (struct ext2_ext_attr_entry *)(header+1);
2637         end = block_buf + fs->blocksize;
2638         entry = first;
2639         while ((char *)entry < end && *(__u32 *)entry) {
2640                 __u32 hash;
2641
2642                 if (region_allocate(region, (char *)entry - (char *)header,
2643                                    EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
2644                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2645                                 goto clear_extattr;
2646                         break;
2647                 }
2648                 if ((ctx->ext_attr_ver == 1 &&
2649                      (entry->e_name_len == 0 || entry->e_name_index != 0)) ||
2650                     (ctx->ext_attr_ver == 2 &&
2651                      entry->e_name_index == 0)) {
2652                         if (fix_problem(ctx, PR_1_EA_BAD_NAME, pctx))
2653                                 goto clear_extattr;
2654                         break;
2655                 }
2656                 if (entry->e_value_inum == 0) {
2657                         if (entry->e_value_size > EXT2_XATTR_SIZE_MAX ||
2658                             (entry->e_value_offs + entry->e_value_size >
2659                              fs->blocksize)) {
2660                                 if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2661                                         goto clear_extattr;
2662                                 break;
2663                         }
2664                         if (entry->e_value_size &&
2665                             region_allocate(region, entry->e_value_offs,
2666                                             EXT2_EXT_ATTR_SIZE(entry->e_value_size))) {
2667                                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION,
2668                                                 pctx))
2669                                         goto clear_extattr;
2670                         }
2671
2672                         hash = ext2fs_ext_attr_hash_entry(entry, block_buf +
2673                                                           entry->e_value_offs);
2674
2675                         if (entry->e_hash != hash) {
2676                                 pctx->num = entry->e_hash;
2677                                 if (fix_problem(ctx, PR_1_ATTR_HASH, pctx))
2678                                         goto clear_extattr;
2679                                 entry->e_hash = hash;
2680                         }
2681                 } else {
2682                         problem_t problem;
2683                         blk64_t entry_quota_blocks;
2684
2685                         problem = check_large_ea_inode(ctx, entry, pctx,
2686                                                        &entry_quota_blocks);
2687                         if (problem && fix_problem(ctx, problem, pctx))
2688                                 goto clear_extattr;
2689
2690                         quota_blocks += entry_quota_blocks;
2691                         quota_inodes++;
2692                 }
2693
2694                 entry = EXT2_EXT_ATTR_NEXT(entry);
2695         }
2696         if (region_allocate(region, (char *)entry - (char *)header, 4)) {
2697                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2698                         goto clear_extattr;
2699         }
2700         region_free(region);
2701
2702         /*
2703          * We only get here if there was no other errors that were fixed.
2704          * If there was a checksum fail, ask to correct it.
2705          */
2706         if (failed_csum &&
2707             fix_problem(ctx, PR_1_EA_BLOCK_ONLY_CSUM_INVALID, pctx)) {
2708                 pctx->errcode = ext2fs_write_ext_attr3(fs, blk, block_buf,
2709                                                        pctx->ino);
2710                 if (pctx->errcode)
2711                         return 0;
2712         }
2713
2714         if (quota_blocks != EXT2FS_C2B(fs, 1U)) {
2715                 if (!ctx->ea_block_quota_blocks) {
2716                         pctx->errcode = ea_refcount_create(0,
2717                                                 &ctx->ea_block_quota_blocks);
2718                         if (pctx->errcode) {
2719                                 pctx->num = 3;
2720                                 goto refcount_fail;
2721                         }
2722                 }
2723                 ea_refcount_store(ctx->ea_block_quota_blocks, blk,
2724                                   quota_blocks);
2725         }
2726
2727         if (quota_inodes) {
2728                 if (!ctx->ea_block_quota_inodes) {
2729                         pctx->errcode = ea_refcount_create(0,
2730                                                 &ctx->ea_block_quota_inodes);
2731                         if (pctx->errcode) {
2732                                 pctx->num = 4;
2733 refcount_fail:
2734                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2735                                 ctx->flags |= E2F_FLAG_ABORT;
2736                                 return 0;
2737                         }
2738                 }
2739
2740                 ea_refcount_store(ctx->ea_block_quota_inodes, blk,
2741                                   quota_inodes);
2742         }
2743         ea_block_quota->blocks = quota_blocks;
2744         ea_block_quota->inodes = quota_inodes;
2745
2746         inc_ea_inode_refs(ctx, pctx, first, end);
2747         ea_refcount_store(ctx->refcount, blk, header->h_refcount - 1);
2748         mark_block_used(ctx, blk);
2749         ext2fs_fast_mark_block_bitmap2(ctx->block_ea_map, blk);
2750         return 1;
2751
2752 clear_extattr:
2753         if (region)
2754                 region_free(region);
2755         ext2fs_file_acl_block_set(fs, inode, 0);
2756         e2fsck_write_inode(ctx, ino, inode, "check_ext_attr");
2757         return 0;
2758 }
2759
2760 /* Returns 1 if bad htree, 0 if OK */
2761 static int handle_htree(e2fsck_t ctx, struct problem_context *pctx,
2762                         ext2_ino_t ino, struct ext2_inode *inode,
2763                         char *block_buf)
2764 {
2765         struct ext2_dx_root_info        *root;
2766         ext2_filsys                     fs = ctx->fs;
2767         errcode_t                       retval;
2768         blk64_t                         blk;
2769
2770         if ((!LINUX_S_ISDIR(inode->i_mode) &&
2771              fix_problem(ctx, PR_1_HTREE_NODIR, pctx)) ||
2772             (!ext2fs_has_feature_dir_index(fs->super) &&
2773              fix_problem(ctx, PR_1_HTREE_SET, pctx)))
2774                 return 1;
2775
2776         pctx->errcode = ext2fs_bmap2(fs, ino, inode, 0, 0, 0, 0, &blk);
2777
2778         if ((pctx->errcode) ||
2779             (blk == 0) ||
2780             (blk < fs->super->s_first_data_block) ||
2781             (blk >= ext2fs_blocks_count(fs->super))) {
2782                 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2783                         return 1;
2784                 else
2785                         return 0;
2786         }
2787
2788         retval = io_channel_read_blk64(fs->io, blk, 1, block_buf);
2789         if (retval && fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2790                 return 1;
2791
2792         /* XXX should check that beginning matches a directory */
2793         root = (struct ext2_dx_root_info *) (block_buf + 24);
2794
2795         if ((root->reserved_zero || root->info_length < 8) &&
2796             fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2797                 return 1;
2798
2799         pctx->num = root->hash_version;
2800         if ((root->hash_version != EXT2_HASH_LEGACY) &&
2801             (root->hash_version != EXT2_HASH_HALF_MD4) &&
2802             (root->hash_version != EXT2_HASH_TEA) &&
2803             (root->hash_version != EXT2_HASH_SIPHASH) &&
2804             fix_problem(ctx, PR_1_HTREE_HASHV, pctx))
2805                 return 1;
2806
2807         if (ext4_hash_in_dirent(inode)) {
2808                 if (root->hash_version != EXT2_HASH_SIPHASH &&
2809                     fix_problem(ctx, PR_1_HTREE_NEEDS_SIPHASH, pctx))
2810                         return 1;
2811         } else {
2812                 if (root->hash_version == EXT2_HASH_SIPHASH &&
2813                    fix_problem(ctx, PR_1_HTREE_CANNOT_SIPHASH, pctx))
2814                         return 1;
2815         }
2816
2817         if ((root->unused_flags & EXT2_HASH_FLAG_INCOMPAT) &&
2818             fix_problem(ctx, PR_1_HTREE_INCOMPAT, pctx))
2819                 return 1;
2820
2821         pctx->num = root->indirect_levels;
2822         /* if htree level is clearly too high, consider it to be broken */
2823         if (root->indirect_levels > EXT4_HTREE_LEVEL &&
2824             fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2825                 return 1;
2826
2827         /* if level is only maybe too high, LARGE_DIR feature could be unset */
2828         if (root->indirect_levels > ext2_dir_htree_level(fs) &&
2829             !ext2fs_has_feature_largedir(fs->super)) {
2830                 int blockbits = EXT2_BLOCK_SIZE_BITS(fs->super) + 10;
2831                 unsigned idx_pb = 1 << (blockbits - 3);
2832
2833                 /* compare inode size/blocks vs. max-sized 2-level htree */
2834                 if (EXT2_I_SIZE(pctx->inode) <
2835                     (idx_pb - 1) * (idx_pb - 2) << blockbits &&
2836                     pctx->inode->i_blocks <
2837                     (idx_pb - 1) * (idx_pb - 2) << (blockbits - 9) &&
2838                     fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2839                         return 1;
2840         }
2841
2842         if (root->indirect_levels > EXT4_HTREE_LEVEL_COMPAT ||
2843             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
2844                 ctx->large_dirs++;
2845
2846         return 0;
2847 }
2848
2849 void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino,
2850                         struct ext2_inode *inode, int restart_flag,
2851                         const char *source)
2852 {
2853         inode->i_flags = 0;
2854         inode->i_links_count = 0;
2855         ext2fs_icount_store(ctx->inode_link_info, ino, 0);
2856         inode->i_dtime = ctx->now;
2857
2858         /*
2859          * If a special inode has such rotten block mappings that we
2860          * want to clear the whole inode, be sure to actually zap
2861          * the block maps because i_links_count isn't checked for
2862          * special inodes, and we'll end up right back here the next
2863          * time we run fsck.
2864          */
2865         if (ino < EXT2_FIRST_INODE(ctx->fs->super))
2866                 memset(inode->i_block, 0, sizeof(inode->i_block));
2867
2868         ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
2869         ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
2870         if (ctx->inode_reg_map)
2871                 ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
2872         if (ctx->inode_bad_map)
2873                 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
2874
2875         /*
2876          * If the inode was partially accounted for before processing
2877          * was aborted, we need to restart the pass 1 scan.
2878          */
2879         ctx->flags |= restart_flag;
2880
2881         if (ino == EXT2_BAD_INO)
2882                 memset(inode, 0, sizeof(struct ext2_inode));
2883
2884         e2fsck_write_inode(ctx, ino, inode, source);
2885 }
2886
2887 /*
2888  * Use the multiple-blocks reclamation code to fix alignment problems in
2889  * a bigalloc filesystem.  We want a logical cluster to map to *only* one
2890  * physical cluster, and we want the block offsets within that cluster to
2891  * line up.
2892  */
2893 static int has_unaligned_cluster_map(e2fsck_t ctx,
2894                                      blk64_t last_pblk, blk64_t last_lblk,
2895                                      blk64_t pblk, blk64_t lblk)
2896 {
2897         blk64_t cluster_mask;
2898
2899         if (!ctx->fs->cluster_ratio_bits)
2900                 return 0;
2901         cluster_mask = EXT2FS_CLUSTER_MASK(ctx->fs);
2902
2903         /*
2904          * If the block in the logical cluster doesn't align with the block in
2905          * the physical cluster...
2906          */
2907         if ((lblk & cluster_mask) != (pblk & cluster_mask))
2908                 return 1;
2909
2910         /*
2911          * If we cross a physical cluster boundary within a logical cluster...
2912          */
2913         if (last_pblk && (lblk & cluster_mask) != 0 &&
2914             EXT2FS_B2C(ctx->fs, lblk) == EXT2FS_B2C(ctx->fs, last_lblk) &&
2915             EXT2FS_B2C(ctx->fs, pblk) != EXT2FS_B2C(ctx->fs, last_pblk))
2916                 return 1;
2917
2918         return 0;
2919 }
2920
2921 static void scan_extent_node(e2fsck_t ctx, struct problem_context *pctx,
2922                              struct process_block_struct *pb,
2923                              blk64_t start_block, blk64_t end_block,
2924                              blk64_t eof_block,
2925                              ext2_extent_handle_t ehandle,
2926                              int try_repairs)
2927 {
2928         struct ext2fs_extent    extent;
2929         blk64_t                 blk, last_lblk;
2930         unsigned int            i, n;
2931         int                     is_dir, is_leaf;
2932         problem_t               problem;
2933         struct ext2_extent_info info;
2934         int                     failed_csum = 0;
2935
2936         if (pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID)
2937                 failed_csum = 1;
2938
2939         pctx->errcode = ext2fs_extent_get_info(ehandle, &info);
2940         if (pctx->errcode)
2941                 return;
2942         if (!(ctx->options & E2F_OPT_FIXES_ONLY) &&
2943             !pb->eti.force_rebuild &&
2944             info.curr_level < MAX_EXTENT_DEPTH_COUNT) {
2945                 struct extent_tree_level *etl;
2946
2947                 etl = pb->eti.ext_info + info.curr_level;
2948                 etl->num_extents += info.num_entries;
2949                 etl->max_extents += info.max_entries;
2950                 /*
2951                  * Implementation wart: Splitting extent blocks when appending
2952                  * will leave the old block with one free entry.  Therefore
2953                  * unless the node is totally full, pretend that a non-root
2954                  * extent block can hold one fewer entry than it actually does,
2955                  * so that we don't repeatedly rebuild the extent tree.
2956                  */
2957                 if (info.curr_level && info.num_entries < info.max_entries)
2958                         etl->max_extents--;
2959         }
2960
2961         pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_FIRST_SIB,
2962                                           &extent);
2963         while ((pctx->errcode == 0 ||
2964                 pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID) &&
2965                info.num_entries-- > 0) {
2966                 is_leaf = extent.e_flags & EXT2_EXTENT_FLAGS_LEAF;
2967                 is_dir = LINUX_S_ISDIR(pctx->inode->i_mode);
2968                 last_lblk = extent.e_lblk + extent.e_len - 1;
2969
2970                 problem = 0;
2971                 pctx->blk = extent.e_pblk;
2972                 pctx->blk2 = extent.e_lblk;
2973                 pctx->num = extent.e_len;
2974                 pctx->blkcount = extent.e_lblk + extent.e_len;
2975
2976                 if (extent.e_pblk == 0 ||
2977                     extent.e_pblk < ctx->fs->super->s_first_data_block ||
2978                     extent.e_pblk >= ext2fs_blocks_count(ctx->fs->super))
2979                         problem = PR_1_EXTENT_BAD_START_BLK;
2980                 else if (extent.e_lblk < start_block)
2981                         problem = PR_1_OUT_OF_ORDER_EXTENTS;
2982                 else if ((end_block && last_lblk > end_block) &&
2983                          !(last_lblk > eof_block &&
2984                            ((extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) ||
2985                             (pctx->inode->i_flags & EXT4_VERITY_FL))))
2986                         problem = PR_1_EXTENT_END_OUT_OF_BOUNDS;
2987                 else if (is_leaf && extent.e_len == 0)
2988                         problem = PR_1_EXTENT_LENGTH_ZERO;
2989                 else if (is_leaf &&
2990                          (extent.e_pblk + extent.e_len) >
2991                          ext2fs_blocks_count(ctx->fs->super))
2992                         problem = PR_1_EXTENT_ENDS_BEYOND;
2993                 else if (is_leaf && is_dir && !pctx->inode->i_size_high &&
2994                          !ext2fs_has_feature_largedir(ctx->fs->super) &&
2995                          ((extent.e_lblk + extent.e_len) >
2996                           (1U << (21 - ctx->fs->super->s_log_block_size))))
2997                         problem = PR_1_TOOBIG_DIR;
2998
2999                 if (is_leaf && problem == 0 && extent.e_len > 0) {
3000 #if 0
3001                         printf("extent_region(ino=%u, expect=%llu, "
3002                                "lblk=%llu, len=%u)\n", pb->ino,
3003                                (unsigned long long) pb->next_lblock,
3004                                (unsigned long long) extent.e_lblk,
3005                                extent.e_len);
3006 #endif
3007                         if (extent.e_lblk < pb->next_lblock)
3008                                 problem = PR_1_EXTENT_COLLISION;
3009                         else if (extent.e_lblk + extent.e_len > pb->next_lblock)
3010                                 pb->next_lblock = extent.e_lblk + extent.e_len;
3011                 }
3012
3013                 /*
3014                  * Uninitialized blocks in a directory?  Clear the flag and
3015                  * we'll interpret the blocks later.
3016                  */
3017                 if (try_repairs && is_dir && problem == 0 &&
3018                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
3019                     fix_problem(ctx, PR_1_UNINIT_DBLOCK, pctx)) {
3020                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
3021                         pb->inode_modified = 1;
3022                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
3023                                                               &extent);
3024                         if (pctx->errcode)
3025                                 return;
3026                         failed_csum = 0;
3027                 }
3028 #ifdef CONFIG_DEVELOPER_FEATURES
3029                 if (try_repairs && !is_dir && problem == 0 &&
3030                     (ctx->options & E2F_OPT_CLEAR_UNINIT) &&
3031                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
3032                     fix_problem(ctx, PR_1_CLEAR_UNINIT_EXTENT, pctx)) {
3033                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
3034                         pb->inode_modified = 1;
3035                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
3036                                                               &extent);
3037                         if (pctx->errcode)
3038                                 return;
3039                         failed_csum = 0;
3040                 }
3041 #endif
3042                 if (try_repairs && problem) {
3043 report_problem:
3044                         if (fix_problem(ctx, problem, pctx)) {
3045                                 if (ctx->invalid_bitmaps) {
3046                                         /*
3047                                          * If fsck knows the bitmaps are bad,
3048                                          * skip to the next extent and
3049                                          * try to clear this extent again
3050                                          * after fixing the bitmaps, by
3051                                          * restarting fsck.
3052                                          */
3053                                         pctx->errcode = ext2fs_extent_get(
3054                                                           ehandle,
3055                                                           EXT2_EXTENT_NEXT_SIB,
3056                                                           &extent);
3057                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3058                                         if (pctx->errcode ==
3059                                                     EXT2_ET_NO_CURRENT_NODE) {
3060                                                 pctx->errcode = 0;
3061                                                 break;
3062                                         }
3063                                         continue;
3064                                 }
3065                                 e2fsck_read_bitmaps(ctx);
3066                                 pb->inode_modified = 1;
3067                                 pctx->errcode =
3068                                         ext2fs_extent_delete(ehandle, 0);
3069                                 if (pctx->errcode) {
3070                                         pctx->str = "ext2fs_extent_delete";
3071                                         return;
3072                                 }
3073                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3074                                 if (pctx->errcode &&
3075                                     pctx->errcode != EXT2_ET_NO_CURRENT_NODE) {
3076                                         pctx->str = "ext2fs_extent_fix_parents";
3077                                         return;
3078                                 }
3079                                 pctx->errcode = ext2fs_extent_get(ehandle,
3080                                                                   EXT2_EXTENT_CURRENT,
3081                                                                   &extent);
3082                                 if (pctx->errcode == EXT2_ET_NO_CURRENT_NODE) {
3083                                         pctx->errcode = 0;
3084                                         break;
3085                                 }
3086                                 failed_csum = 0;
3087                                 continue;
3088                         }
3089                         goto next;
3090                 }
3091
3092                 if (!is_leaf) {
3093                         blk64_t lblk = extent.e_lblk;
3094                         int next_try_repairs = 1;
3095
3096                         blk = extent.e_pblk;
3097
3098                         /*
3099                          * If this lower extent block collides with critical
3100                          * metadata, don't try to repair the damage.  Pass 1b
3101                          * will reallocate the block; then we can try again.
3102                          */
3103                         if (pb->ino != EXT2_RESIZE_INO &&
3104                             extent.e_pblk < ctx->fs->super->s_blocks_count &&
3105                             ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3106                                                       extent.e_pblk)) {
3107                                 next_try_repairs = 0;
3108                                 pctx->blk = blk;
3109                                 fix_problem(ctx,
3110                                             PR_1_CRITICAL_METADATA_COLLISION,
3111                                             pctx);
3112                                 if ((ctx->options & E2F_OPT_NO) == 0)
3113                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3114                         }
3115                         pctx->errcode = ext2fs_extent_get(ehandle,
3116                                                   EXT2_EXTENT_DOWN, &extent);
3117                         if (pctx->errcode &&
3118                             pctx->errcode != EXT2_ET_EXTENT_CSUM_INVALID) {
3119                                 pctx->str = "EXT2_EXTENT_DOWN";
3120                                 problem = PR_1_EXTENT_HEADER_INVALID;
3121                                 if (!next_try_repairs)
3122                                         return;
3123                                 if (pctx->errcode == EXT2_ET_EXTENT_HEADER_BAD)
3124                                         goto report_problem;
3125                                 return;
3126                         }
3127                         /* The next extent should match this index's logical start */
3128                         if (extent.e_lblk != lblk) {
3129                                 struct ext2_extent_info e_info;
3130
3131                                 pctx->errcode = ext2fs_extent_get_info(ehandle,
3132                                                                        &e_info);
3133                                 if (pctx->errcode) {
3134                                         pctx->str = "ext2fs_extent_get_info";
3135                                         return;
3136                                 }
3137                                 pctx->blk = lblk;
3138                                 pctx->blk2 = extent.e_lblk;
3139                                 pctx->num = e_info.curr_level - 1;
3140                                 problem = PR_1_EXTENT_INDEX_START_INVALID;
3141                                 if (fix_problem(ctx, problem, pctx)) {
3142                                         pb->inode_modified = 1;
3143                                         pctx->errcode =
3144                                                 ext2fs_extent_fix_parents(ehandle);
3145                                         if (pctx->errcode) {
3146                                                 pctx->str = "ext2fs_extent_fix_parents";
3147                                                 return;
3148                                         }
3149                                 }
3150                         }
3151                         scan_extent_node(ctx, pctx, pb, extent.e_lblk,
3152                                          last_lblk, eof_block, ehandle,
3153                                          next_try_repairs);
3154                         if (pctx->errcode)
3155                                 return;
3156                         pctx->errcode = ext2fs_extent_get(ehandle,
3157                                                   EXT2_EXTENT_UP, &extent);
3158                         if (pctx->errcode) {
3159                                 pctx->str = "EXT2_EXTENT_UP";
3160                                 return;
3161                         }
3162                         mark_block_used(ctx, blk);
3163                         pb->num_blocks++;
3164                         goto next;
3165                 }
3166
3167                 if ((pb->previous_block != 0) &&
3168                     (pb->previous_block+1 != extent.e_pblk)) {
3169                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3170                                 char type = '?';
3171
3172                                 if (pb->is_dir)
3173                                         type = 'd';
3174                                 else if (pb->is_reg)
3175                                         type = 'f';
3176
3177                                 printf(("%6lu(%c): expecting %6lu "
3178                                         "actual extent "
3179                                         "phys %6lu log %lu len %lu\n"),
3180                                        (unsigned long) pctx->ino, type,
3181                                        (unsigned long) pb->previous_block+1,
3182                                        (unsigned long) extent.e_pblk,
3183                                        (unsigned long) extent.e_lblk,
3184                                        (unsigned long) extent.e_len);
3185                         }
3186                         pb->fragmented = 1;
3187                 }
3188                 /*
3189                  * If we notice a gap in the logical block mappings of an
3190                  * extent-mapped directory, offer to close the hole by
3191                  * moving the logical block down, otherwise we'll go mad in
3192                  * pass 3 allocating empty directory blocks to fill the hole.
3193                  */
3194                 if (try_repairs && is_dir &&
3195                     pb->last_block + 1 < extent.e_lblk) {
3196                         blk64_t new_lblk;
3197
3198                         new_lblk = pb->last_block + 1;
3199                         if (EXT2FS_CLUSTER_RATIO(ctx->fs) > 1)
3200                                 new_lblk = ((new_lblk +
3201                                              EXT2FS_CLUSTER_RATIO(ctx->fs) - 1) &
3202                                             ~EXT2FS_CLUSTER_MASK(ctx->fs)) |
3203                                            (extent.e_pblk &
3204                                             EXT2FS_CLUSTER_MASK(ctx->fs));
3205                         pctx->blk = extent.e_lblk;
3206                         pctx->blk2 = new_lblk;
3207                         if (fix_problem(ctx, PR_1_COLLAPSE_DBLOCK, pctx)) {
3208                                 extent.e_lblk = new_lblk;
3209                                 pb->inode_modified = 1;
3210                                 pctx->errcode = ext2fs_extent_replace(ehandle,
3211                                                                 0, &extent);
3212                                 if (pctx->errcode) {
3213                                         pctx->errcode = 0;
3214                                         goto alloc_later;
3215                                 }
3216                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3217                                 if (pctx->errcode)
3218                                         goto failed_add_dir_block;
3219                                 pctx->errcode = ext2fs_extent_goto(ehandle,
3220                                                                 extent.e_lblk);
3221                                 if (pctx->errcode)
3222                                         goto failed_add_dir_block;
3223                                 last_lblk = extent.e_lblk + extent.e_len - 1;
3224                                 failed_csum = 0;
3225                         }
3226                 }
3227 alloc_later:
3228                 if (is_dir) {
3229                         while (++pb->last_db_block <
3230                                (e2_blkcnt_t) extent.e_lblk) {
3231                                 pctx->errcode = ext2fs_add_dir_block2(
3232                                                         ctx->fs->dblist,
3233                                                         pb->ino, 0,
3234                                                         pb->last_db_block);
3235                                 if (pctx->errcode) {
3236                                         pctx->blk = 0;
3237                                         pctx->num = pb->last_db_block;
3238                                         goto failed_add_dir_block;
3239                                 }
3240                         }
3241
3242                         for (i = 0; i < extent.e_len; i++) {
3243                                 pctx->errcode = ext2fs_add_dir_block2(
3244                                                         ctx->fs->dblist,
3245                                                         pctx->ino,
3246                                                         extent.e_pblk + i,
3247                                                         extent.e_lblk + i);
3248                                 if (pctx->errcode) {
3249                                         pctx->blk = extent.e_pblk + i;
3250                                         pctx->num = extent.e_lblk + i;
3251                                 failed_add_dir_block:
3252                                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3253                                         /* Should never get here */
3254                                         ctx->flags |= E2F_FLAG_ABORT;
3255                                         return;
3256                                 }
3257                         }
3258                         if (extent.e_len > 0)
3259                                 pb->last_db_block = extent.e_lblk + extent.e_len - 1;
3260                 }
3261                 if (has_unaligned_cluster_map(ctx, pb->previous_block,
3262                                               pb->last_block,
3263                                               extent.e_pblk,
3264                                               extent.e_lblk)) {
3265                         for (i = 0; i < extent.e_len; i++) {
3266                                 pctx->blk = extent.e_lblk + i;
3267                                 pctx->blk2 = extent.e_pblk + i;
3268                                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3269                                 mark_block_used(ctx, extent.e_pblk + i);
3270                                 mark_block_used(ctx, extent.e_pblk + i);
3271                         }
3272                 }
3273
3274                 /*
3275                  * Check whether first cluster got marked in previous iteration.
3276                  */
3277                 if (ctx->fs->cluster_ratio_bits &&
3278                     pb->previous_block &&
3279                     (EXT2FS_B2C(ctx->fs, extent.e_pblk) ==
3280                      EXT2FS_B2C(ctx->fs, pb->previous_block)))
3281                         /* Set blk to the beginning of next cluster. */
3282                         blk = EXT2FS_C2B(
3283                                 ctx->fs,
3284                                 EXT2FS_B2C(ctx->fs, extent.e_pblk) + 1);
3285                 else
3286                         /* Set blk to the beginning of current cluster. */
3287                         blk = EXT2FS_C2B(ctx->fs,
3288                                          EXT2FS_B2C(ctx->fs, extent.e_pblk));
3289
3290                 if (blk < extent.e_pblk + extent.e_len) {
3291                         mark_blocks_used(ctx, blk,
3292                                          extent.e_pblk + extent.e_len - blk);
3293                         n = DIV_ROUND_UP(extent.e_pblk + extent.e_len - blk,
3294                                          EXT2FS_CLUSTER_RATIO(ctx->fs));
3295                         pb->num_blocks += n;
3296                 }
3297                 pb->last_block = extent.e_lblk + extent.e_len - 1;
3298                 pb->previous_block = extent.e_pblk + extent.e_len - 1;
3299                 start_block = pb->last_block = last_lblk;
3300                 if (is_leaf && !is_dir &&
3301                     !(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT))
3302                         pb->last_init_lblock = last_lblk;
3303         next:
3304                 pctx->errcode = ext2fs_extent_get(ehandle,
3305                                                   EXT2_EXTENT_NEXT_SIB,
3306                                                   &extent);
3307         }
3308
3309         /* Failed csum but passes checks?  Ask to fix checksum. */
3310         if (failed_csum &&
3311             fix_problem(ctx, PR_1_EXTENT_ONLY_CSUM_INVALID, pctx)) {
3312                 pb->inode_modified = 1;
3313                 pctx->errcode = ext2fs_extent_replace(ehandle, 0, &extent);
3314                 if (pctx->errcode)
3315                         return;
3316         }
3317
3318         if (pctx->errcode == EXT2_ET_EXTENT_NO_NEXT)
3319                 pctx->errcode = 0;
3320 }
3321
3322 static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx,
3323                                  struct process_block_struct *pb)
3324 {
3325         struct ext2_extent_info info;
3326         struct ext2_inode       *inode = pctx->inode;
3327         ext2_extent_handle_t    ehandle;
3328         ext2_filsys             fs = ctx->fs;
3329         ext2_ino_t              ino = pctx->ino;
3330         errcode_t               retval;
3331         blk64_t                 eof_lblk;
3332         struct ext3_extent_header       *eh;
3333
3334         /* Check for a proper extent header... */
3335         eh = (struct ext3_extent_header *) &inode->i_block[0];
3336         retval = ext2fs_extent_header_verify(eh, sizeof(inode->i_block));
3337         if (retval) {
3338                 if (fix_problem(ctx, PR_1_MISSING_EXTENT_HEADER, pctx))
3339                         e2fsck_clear_inode(ctx, ino, inode, 0,
3340                                            "check_blocks_extents");
3341                 pctx->errcode = 0;
3342                 return;
3343         }
3344
3345         /* ...since this function doesn't fail if i_block is zeroed. */
3346         pctx->errcode = ext2fs_extent_open2(fs, ino, inode, &ehandle);
3347         if (pctx->errcode) {
3348                 if (fix_problem(ctx, PR_1_READ_EXTENT, pctx))
3349                         e2fsck_clear_inode(ctx, ino, inode, 0,
3350                                            "check_blocks_extents");
3351                 pctx->errcode = 0;
3352                 return;
3353         }
3354
3355         retval = ext2fs_extent_get_info(ehandle, &info);
3356         if (retval == 0) {
3357                 int max_depth = info.max_depth;
3358
3359                 if (max_depth >= MAX_EXTENT_DEPTH_COUNT)
3360                         max_depth = MAX_EXTENT_DEPTH_COUNT-1;
3361                 ctx->extent_depth_count[max_depth]++;
3362         }
3363
3364         /* Check maximum extent depth */
3365         pctx->blk = info.max_depth;
3366         pctx->blk2 = ext2fs_max_extent_depth(ehandle);
3367         if (pctx->blk2 < pctx->blk &&
3368             fix_problem(ctx, PR_1_EXTENT_BAD_MAX_DEPTH, pctx))
3369                 pb->eti.force_rebuild = 1;
3370
3371         /* Can we collect extent tree level stats? */
3372         pctx->blk = MAX_EXTENT_DEPTH_COUNT;
3373         if (pctx->blk2 > pctx->blk)
3374                 fix_problem(ctx, PR_1E_MAX_EXTENT_TREE_DEPTH, pctx);
3375         memset(pb->eti.ext_info, 0, sizeof(pb->eti.ext_info));
3376         pb->eti.ino = pb->ino;
3377
3378         pb->next_lblock = 0;
3379
3380         eof_lblk = ((EXT2_I_SIZE(inode) + fs->blocksize - 1) >>
3381                 EXT2_BLOCK_SIZE_BITS(fs->super)) - 1;
3382         scan_extent_node(ctx, pctx, pb, 0, 0, eof_lblk, ehandle, 1);
3383         if (pctx->errcode &&
3384             fix_problem(ctx, PR_1_EXTENT_ITERATE_FAILURE, pctx)) {
3385                 pb->num_blocks = 0;
3386                 inode->i_blocks = 0;
3387                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3388                                    "check_blocks_extents");
3389                 pctx->errcode = 0;
3390         }
3391         ext2fs_extent_free(ehandle);
3392
3393         /* Rebuild unless it's a dir and we're rehashing it */
3394         if (LINUX_S_ISDIR(inode->i_mode) &&
3395             e2fsck_dir_will_be_rehashed(ctx, ino))
3396                 return;
3397
3398         if (ctx->options & E2F_OPT_CONVERT_BMAP)
3399                 e2fsck_rebuild_extents_later(ctx, ino);
3400         else
3401                 e2fsck_should_rebuild_extents(ctx, pctx, &pb->eti, &info);
3402 }
3403
3404 /*
3405  * In fact we don't need to check blocks for an inode with inline data
3406  * because this inode doesn't have any blocks.  In this function all
3407  * we need to do is add this inode into dblist when it is a directory.
3408  */
3409 static void check_blocks_inline_data(e2fsck_t ctx, struct problem_context *pctx,
3410                                      struct process_block_struct *pb)
3411 {
3412         int     flags;
3413         size_t  inline_data_size = 0;
3414
3415         if (!pb->is_dir) {
3416                 pctx->errcode = 0;
3417                 return;
3418         }
3419
3420         /* Process the dirents in i_block[] as the "first" block. */
3421         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 0);
3422         if (pctx->errcode)
3423                 goto err;
3424
3425         /* Process the dirents in the EA as a "second" block. */
3426         flags = ctx->fs->flags;
3427         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3428         pctx->errcode = ext2fs_inline_data_size(ctx->fs, pb->ino,
3429                                                 &inline_data_size);
3430         ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3431                          (ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3432         if (pctx->errcode) {
3433                 pctx->errcode = 0;
3434                 return;
3435         }
3436
3437         if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE)
3438                 return;
3439
3440         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 1);
3441         if (pctx->errcode)
3442                 goto err;
3443
3444         return;
3445 err:
3446         pctx->blk = 0;
3447         pctx->num = 0;
3448         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3449         ctx->flags |= E2F_FLAG_ABORT;
3450 }
3451
3452 /*
3453  * This subroutine is called on each inode to account for all of the
3454  * blocks used by that inode.
3455  */
3456 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
3457                          char *block_buf, const struct ea_quota *ea_ibody_quota)
3458 {
3459         ext2_filsys fs = ctx->fs;
3460         struct process_block_struct pb;
3461         ext2_ino_t      ino = pctx->ino;
3462         struct ext2_inode *inode = pctx->inode;
3463         unsigned        bad_size = 0;
3464         int             dirty_inode = 0;
3465         int             extent_fs;
3466         int             inlinedata_fs;
3467         __u64           size;
3468         struct ea_quota ea_block_quota;
3469
3470         pb.ino = ino;
3471         pb.num_blocks = EXT2FS_B2C(ctx->fs,
3472                                    ea_ibody_quota ? ea_ibody_quota->blocks : 0);
3473         pb.last_block = ~0;
3474         pb.last_init_lblock = -1;
3475         pb.last_db_block = -1;
3476         pb.num_illegal_blocks = 0;
3477         pb.suppress = 0; pb.clear = 0;
3478         pb.fragmented = 0;
3479         pb.compressed = 0;
3480         pb.previous_block = 0;
3481         pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
3482         pb.is_reg = LINUX_S_ISREG(inode->i_mode);
3483         pb.max_blocks = 1U << (31 - fs->super->s_log_block_size);
3484         pb.inode = inode;
3485         pb.pctx = pctx;
3486         pb.ctx = ctx;
3487         pb.inode_modified = 0;
3488         pb.eti.force_rebuild = 0;
3489         pctx->ino = ino;
3490         pctx->errcode = 0;
3491
3492         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
3493         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
3494
3495         if (check_ext_attr(ctx, pctx, block_buf, &ea_block_quota)) {
3496                 if (e2fsck_should_abort(ctx))
3497                         goto out;
3498                 pb.num_blocks += EXT2FS_B2C(ctx->fs, ea_block_quota.blocks);
3499         }
3500
3501         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL))
3502                 check_blocks_inline_data(ctx, pctx, &pb);
3503         else if (ext2fs_inode_has_valid_blocks2(fs, inode)) {
3504                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL))
3505                         check_blocks_extents(ctx, pctx, &pb);
3506                 else {
3507                         int flags;
3508                         /*
3509                          * If we've modified the inode, write it out before
3510                          * iterate() tries to use it.
3511                          */
3512                         if (dirty_inode) {
3513                                 e2fsck_write_inode(ctx, ino, inode,
3514                                                    "check_blocks");
3515                                 dirty_inode = 0;
3516                         }
3517                         flags = fs->flags;
3518                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3519                         pctx->errcode = ext2fs_block_iterate3(fs, ino,
3520                                                 pb.is_dir ? BLOCK_FLAG_HOLE : 0,
3521                                                 block_buf, process_block, &pb);
3522                         /*
3523                          * We do not have uninitialized extents in non extent
3524                          * files.
3525                          */
3526                         pb.last_init_lblock = pb.last_block;
3527                         /*
3528                          * If iterate() changed a block mapping, we have to
3529                          * re-read the inode.  If we decide to clear the
3530                          * inode after clearing some stuff, we'll re-write the
3531                          * bad mappings into the inode!
3532                          */
3533                         if (pb.inode_modified)
3534                                 e2fsck_read_inode(ctx, ino, inode,
3535                                                   "check_blocks");
3536                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3537                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3538
3539                         if (ctx->options & E2F_OPT_CONVERT_BMAP) {
3540 #ifdef DEBUG
3541                                 printf("bmap rebuild ino=%d\n", ino);
3542 #endif
3543                                 if (!LINUX_S_ISDIR(inode->i_mode) ||
3544                                     !e2fsck_dir_will_be_rehashed(ctx, ino))
3545                                         e2fsck_rebuild_extents_later(ctx, ino);
3546                         }
3547                 }
3548         }
3549         end_problem_latch(ctx, PR_LATCH_BLOCK);
3550         end_problem_latch(ctx, PR_LATCH_TOOBIG);
3551         if (e2fsck_should_abort(ctx))
3552                 goto out;
3553         if (pctx->errcode)
3554                 fix_problem(ctx, PR_1_BLOCK_ITERATE, pctx);
3555
3556         if (pb.fragmented && pb.num_blocks < fs->super->s_blocks_per_group) {
3557                 if (LINUX_S_ISDIR(inode->i_mode))
3558                         ctx->fs_fragmented_dir++;
3559                 else
3560                         ctx->fs_fragmented++;
3561         }
3562
3563         if (pb.clear) {
3564                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3565                                    "check_blocks");
3566                 return;
3567         }
3568
3569         if (inode->i_flags & EXT2_INDEX_FL) {
3570                 if (handle_htree(ctx, pctx, ino, inode, block_buf)) {
3571                         inode->i_flags &= ~EXT2_INDEX_FL;
3572                         dirty_inode++;
3573                 } else {
3574                         e2fsck_add_dx_dir(ctx, ino, inode, pb.last_block+1);
3575                 }
3576         }
3577
3578         if (!pb.num_blocks && pb.is_dir &&
3579             !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
3580                 if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) {
3581                         e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks");
3582                         ctx->fs_directory_count--;
3583                         return;
3584                 }
3585         }
3586
3587         if (ino != quota_type2inum(PRJQUOTA, fs->super) &&
3588             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super)) &&
3589             !(inode->i_flags & EXT4_EA_INODE_FL)) {
3590                 quota_data_add(ctx->qctx, (struct ext2_inode_large *) inode,
3591                                ino,
3592                                pb.num_blocks * EXT2_CLUSTER_SIZE(fs->super));
3593                 quota_data_inodes(ctx->qctx, (struct ext2_inode_large *) inode,
3594                                   ino, (ea_ibody_quota ?
3595                                         ea_ibody_quota->inodes : 0) +
3596                                                 ea_block_quota.inodes + 1);
3597         }
3598
3599         if (!ext2fs_has_feature_huge_file(fs->super) ||
3600             !(inode->i_flags & EXT4_HUGE_FILE_FL))
3601                 pb.num_blocks *= (fs->blocksize / 512);
3602         pb.num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
3603 #if 0
3604         printf("inode %u, i_size = %u, last_block = %llu, i_blocks=%llu, num_blocks = %llu\n",
3605                ino, inode->i_size, (unsigned long long) pb.last_block,
3606                (unsigned long long) ext2fs_inode_i_blocks(fs, inode),
3607                (unsigned long long) pb.num_blocks);
3608 #endif
3609         size = EXT2_I_SIZE(inode);
3610         if (pb.is_dir) {
3611                 unsigned nblock = size >> EXT2_BLOCK_SIZE_BITS(fs->super);
3612                 if (inode->i_flags & EXT4_INLINE_DATA_FL) {
3613                         int flags;
3614                         size_t sz = 0;
3615                         errcode_t err;
3616
3617                         flags = ctx->fs->flags;
3618                         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3619                         err = ext2fs_inline_data_size(ctx->fs, pctx->ino,
3620                                                       &sz);
3621                         ctx->fs->flags = (flags &
3622                                           EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3623                                          (ctx->fs->flags &
3624                                           ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3625                         if (err || sz != size) {
3626                                 bad_size = 7;
3627                                 pctx->num = sz;
3628                         }
3629                 } else if (size & (fs->blocksize - 1))
3630                         bad_size = 5;
3631                 else if (nblock > (pb.last_block + 1))
3632                         bad_size = 1;
3633                 else if (nblock < (pb.last_block + 1)) {
3634                         if (((pb.last_block + 1) - nblock) >
3635                             fs->super->s_prealloc_dir_blocks)
3636                                 bad_size = 2;
3637                 }
3638         } else {
3639                 if ((pb.last_init_lblock >= 0) &&
3640                     /* Do not allow initialized allocated blocks past i_size*/
3641                     (size < (__u64)pb.last_init_lblock * fs->blocksize) &&
3642                     !(inode->i_flags & EXT4_VERITY_FL))
3643                         bad_size = 3;
3644                 else if (!(extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3645                          size > ext2_max_sizes[fs->super->s_log_block_size])
3646                         /* too big for a direct/indirect-mapped file */
3647                         bad_size = 4;
3648                 else if ((extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3649                          size >
3650                          ((1ULL << (32 + EXT2_BLOCK_SIZE_BITS(fs->super))) - 1))
3651                         /* too big for an extent-based file - 32bit ee_block */
3652                         bad_size = 6;
3653         }
3654         /* i_size for symlinks is checked elsewhere */
3655         if (bad_size && !LINUX_S_ISLNK(inode->i_mode)) {
3656                 /* Did inline_data set pctx->num earlier? */
3657                 if (bad_size != 7)
3658                         pctx->num = (pb.last_block + 1) * fs->blocksize;
3659                 pctx->group = bad_size;
3660                 if (fix_problem(ctx, PR_1_BAD_I_SIZE, pctx)) {
3661                         ext2fs_inode_size_set(fs, inode, pctx->num);
3662                         if (EXT2_I_SIZE(inode) == 0 &&
3663                             (inode->i_flags & EXT4_INLINE_DATA_FL)) {
3664                                 memset(inode->i_block, 0,
3665                                        sizeof(inode->i_block));
3666                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
3667                         }
3668                         dirty_inode++;
3669                 }
3670                 pctx->num = 0;
3671         }
3672         if (LINUX_S_ISREG(inode->i_mode) &&
3673             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
3674                 ctx->large_files++;
3675         if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
3676             ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) ||
3677              (ext2fs_has_feature_huge_file(fs->super) &&
3678               (inode->i_flags & EXT4_HUGE_FILE_FL) &&
3679               (inode->osd2.linux2.l_i_blocks_hi != 0)))) {
3680                 pctx->num = pb.num_blocks;
3681                 if (fix_problem(ctx, PR_1_BAD_I_BLOCKS, pctx)) {
3682                         inode->i_blocks = pb.num_blocks;
3683                         inode->osd2.linux2.l_i_blocks_hi = pb.num_blocks >> 32;
3684                         dirty_inode++;
3685                 }
3686                 pctx->num = 0;
3687         }
3688
3689         /*
3690          * The kernel gets mad if we ask it to allocate bigalloc clusters to
3691          * a block mapped file, so rebuild it as an extent file.  We can skip
3692          * symlinks because they're never rewritten.
3693          */
3694         if (ext2fs_has_feature_bigalloc(fs->super) &&
3695             (LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode)) &&
3696             ext2fs_inode_data_blocks2(fs, inode) > 0 &&
3697             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INO(fs->super)) &&
3698             !(inode->i_flags & (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)) &&
3699             fix_problem(ctx, PR_1_NO_BIGALLOC_BLOCKMAP_FILES, pctx)) {
3700                 pctx->errcode = e2fsck_rebuild_extents_later(ctx, ino);
3701                 if (pctx->errcode)
3702                         goto out;
3703         }
3704
3705         if (ctx->dirs_to_hash && pb.is_dir &&
3706             !(ctx->lost_and_found && ctx->lost_and_found == ino) &&
3707             !(inode->i_flags & EXT2_INDEX_FL) &&
3708             ((inode->i_size / fs->blocksize) >= 3))
3709                 e2fsck_rehash_dir_later(ctx, ino);
3710
3711 out:
3712         if (dirty_inode)
3713                 e2fsck_write_inode(ctx, ino, inode, "check_blocks");
3714 }
3715
3716 #if 0
3717 /*
3718  * Helper function called by process block when an illegal block is
3719  * found.  It returns a description about why the block is illegal
3720  */
3721 static char *describe_illegal_block(ext2_filsys fs, blk64_t block)
3722 {
3723         blk64_t super;
3724         int     i;
3725         static char     problem[80];
3726
3727         super = fs->super->s_first_data_block;
3728         strcpy(problem, "PROGRAMMING ERROR: Unknown reason for illegal block");
3729         if (block < super) {
3730                 sprintf(problem, "< FIRSTBLOCK (%u)", super);
3731                 return(problem);
3732         } else if (block >= ext2fs_blocks_count(fs->super)) {
3733                 sprintf(problem, "> BLOCKS (%u)", ext2fs_blocks_count(fs->super));
3734                 return(problem);
3735         }
3736         for (i = 0; i < fs->group_desc_count; i++) {
3737                 if (block == super) {
3738                         sprintf(problem, "is the superblock in group %d", i);
3739                         break;
3740                 }
3741                 if (block > super &&
3742                     block <= (super + fs->desc_blocks)) {
3743                         sprintf(problem, "is in the group descriptors "
3744                                 "of group %d", i);
3745                         break;
3746                 }
3747                 if (block == ext2fs_block_bitmap_loc(fs, i)) {
3748                         sprintf(problem, "is the block bitmap of group %d", i);
3749                         break;
3750                 }
3751                 if (block == ext2fs_inode_bitmap_loc(fs, i)) {
3752                         sprintf(problem, "is the inode bitmap of group %d", i);
3753                         break;
3754                 }
3755                 if (block >= ext2fs_inode_table_loc(fs, i) &&
3756                     (block < ext2fs_inode_table_loc(fs, i)
3757                      + fs->inode_blocks_per_group)) {
3758                         sprintf(problem, "is in the inode table of group %d",
3759                                 i);
3760                         break;
3761                 }
3762                 super += fs->super->s_blocks_per_group;
3763         }
3764         return(problem);
3765 }
3766 #endif
3767
3768 /*
3769  * This is a helper function for check_blocks().
3770  */
3771 static int process_block(ext2_filsys fs,
3772                   blk64_t       *block_nr,
3773                   e2_blkcnt_t blockcnt,
3774                   blk64_t ref_block EXT2FS_ATTR((unused)),
3775                   int ref_offset EXT2FS_ATTR((unused)),
3776                   void *priv_data)
3777 {
3778         struct process_block_struct *p;
3779         struct problem_context *pctx;
3780         blk64_t blk = *block_nr;
3781         int     ret_code = 0;
3782         problem_t       problem = 0;
3783         e2fsck_t        ctx;
3784
3785         p = (struct process_block_struct *) priv_data;
3786         pctx = p->pctx;
3787         ctx = p->ctx;
3788
3789         /*
3790          * For a directory, add logical block zero for processing even if it's
3791          * not mapped or we'll be perennially stuck with broken "." and ".."
3792          * entries.
3793          */
3794         if (p->is_dir && blockcnt == 0 && blk == 0) {
3795                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino, 0, 0);
3796                 if (pctx->errcode) {
3797                         pctx->blk = blk;
3798                         pctx->num = blockcnt;
3799                         goto failed_add_dir_block;
3800                 }
3801                 p->last_db_block++;
3802         }
3803
3804         if (blk == 0)
3805                 return 0;
3806
3807 #if 0
3808         printf("Process_block, inode %lu, block %u, #%d\n", p->ino, blk,
3809                blockcnt);
3810 #endif
3811
3812         /*
3813          * Simplistic fragmentation check.  We merely require that the
3814          * file be contiguous.  (Which can never be true for really
3815          * big files that are greater than a block group.)
3816          */
3817         if (p->previous_block && p->ino != EXT2_RESIZE_INO) {
3818                 if (p->previous_block+1 != blk) {
3819                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3820                                 char type = '?';
3821
3822                                 if (p->is_dir)
3823                                         type = 'd';
3824                                 else if (p->is_reg)
3825                                         type = 'f';
3826
3827                                 printf(_("%6lu(%c): expecting %6lu "
3828                                          "got phys %6lu (blkcnt %lld)\n"),
3829                                        (unsigned long) pctx->ino, type,
3830                                        (unsigned long) p->previous_block+1,
3831                                        (unsigned long) blk,
3832                                        (long long) blockcnt);
3833                         }
3834                         p->fragmented = 1;
3835                 }
3836         }
3837
3838         if (p->is_dir && !ext2fs_has_feature_largedir(fs->super) &&
3839             !pctx->inode->i_size_high &&
3840             blockcnt > (1 << (21 - fs->super->s_log_block_size)))
3841                 problem = PR_1_TOOBIG_DIR;
3842         if (p->is_dir && p->num_blocks + 1 >= p->max_blocks)
3843                 problem = PR_1_TOOBIG_DIR;
3844         if (p->is_reg && p->num_blocks + 1 >= p->max_blocks)
3845                 problem = PR_1_TOOBIG_REG;
3846         if (!p->is_dir && !p->is_reg && blockcnt > 0)
3847                 problem = PR_1_TOOBIG_SYMLINK;
3848
3849         if (blk < fs->super->s_first_data_block ||
3850             blk >= ext2fs_blocks_count(fs->super))
3851                 problem = PR_1_ILLEGAL_BLOCK_NUM;
3852
3853         /*
3854          * If this IND/DIND/TIND block is squatting atop some critical metadata
3855          * (group descriptors, superblock, bitmap, inode table), any write to
3856          * "fix" mapping problems will destroy the metadata.  We'll let pass 1b
3857          * fix that and restart fsck.
3858          */
3859         if (blockcnt < 0 &&
3860             p->ino != EXT2_RESIZE_INO &&
3861             blk < ctx->fs->super->s_blocks_count &&
3862             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk)) {
3863                 pctx->blk = blk;
3864                 fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx);
3865                 if ((ctx->options & E2F_OPT_NO) == 0)
3866                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3867         }
3868
3869         if (problem) {
3870                 p->num_illegal_blocks++;
3871                 /*
3872                  * A bit of subterfuge here -- we're trying to fix a block
3873                  * mapping, but the IND/DIND/TIND block could have collided
3874                  * with some critical metadata.  So, fix the in-core mapping so
3875                  * iterate won't go insane, but return 0 instead of
3876                  * BLOCK_CHANGED so that it won't write the remapping out to
3877                  * our multiply linked block.
3878                  *
3879                  * Even if we previously determined that an *IND block
3880                  * conflicts with critical metadata, we must still try to
3881                  * iterate the *IND block as if it is an *IND block to find and
3882                  * mark the blocks it points to.  Better to be overly cautious
3883                  * with the used_blocks map so that we don't move the *IND
3884                  * block to a block that's really in use!
3885                  */
3886                 if (p->ino != EXT2_RESIZE_INO &&
3887                     ref_block != 0 &&
3888                     ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3889                                               ref_block)) {
3890                         *block_nr = 0;
3891                         return 0;
3892                 }
3893                 if (!p->suppress && (p->num_illegal_blocks % 12) == 0) {
3894                         if (fix_problem(ctx, PR_1_TOO_MANY_BAD_BLOCKS, pctx)) {
3895                                 p->clear = 1;
3896                                 return BLOCK_ABORT;
3897                         }
3898                         if (fix_problem(ctx, PR_1_SUPPRESS_MESSAGES, pctx)) {
3899                                 p->suppress = 1;
3900                                 set_latch_flags(PR_LATCH_BLOCK,
3901                                                 PRL_SUPPRESS, 0);
3902                         }
3903                 }
3904                 pctx->blk = blk;
3905                 pctx->blkcount = blockcnt;
3906                 if (fix_problem(ctx, problem, pctx)) {
3907                         blk = *block_nr = 0;
3908                         ret_code = BLOCK_CHANGED;
3909                         p->inode_modified = 1;
3910                         /*
3911                          * If the directory block is too big and is beyond the
3912                          * end of the FS, don't bother trying to add it for
3913                          * processing -- the kernel would never have created a
3914                          * directory this large, and we risk an ENOMEM abort.
3915                          * In any case, the toobig handler for extent-based
3916                          * directories also doesn't feed toobig blocks to
3917                          * pass 2.
3918                          */
3919                         if (problem == PR_1_TOOBIG_DIR)
3920                                 return ret_code;
3921                         goto mark_dir;
3922                 } else
3923                         return 0;
3924         }
3925
3926         if (p->ino == EXT2_RESIZE_INO) {
3927                 /*
3928                  * The resize inode has already be sanity checked
3929                  * during pass #0 (the superblock checks).  All we
3930                  * have to do is mark the double indirect block as
3931                  * being in use; all of the other blocks are handled
3932                  * by mark_table_blocks()).
3933                  */
3934                 if (blockcnt == BLOCK_COUNT_DIND)
3935                         mark_block_used(ctx, blk);
3936                 p->num_blocks++;
3937         } else if (!(ctx->fs->cluster_ratio_bits &&
3938                      p->previous_block &&
3939                      (EXT2FS_B2C(ctx->fs, blk) ==
3940                       EXT2FS_B2C(ctx->fs, p->previous_block)) &&
3941                      (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
3942                      ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
3943                 mark_block_used(ctx, blk);
3944                 p->num_blocks++;
3945         } else if (has_unaligned_cluster_map(ctx, p->previous_block,
3946                                              p->last_block, blk, blockcnt)) {
3947                 pctx->blk = blockcnt;
3948                 pctx->blk2 = blk;
3949                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3950                 mark_block_used(ctx, blk);
3951                 mark_block_used(ctx, blk);
3952         }
3953         if (blockcnt >= 0)
3954                 p->last_block = blockcnt;
3955         p->previous_block = blk;
3956 mark_dir:
3957         if (p->is_dir && (blockcnt >= 0)) {
3958                 while (++p->last_db_block < blockcnt) {
3959                         pctx->errcode = ext2fs_add_dir_block2(fs->dblist,
3960                                                               p->ino, 0,
3961                                                               p->last_db_block);
3962                         if (pctx->errcode) {
3963                                 pctx->blk = 0;
3964                                 pctx->num = p->last_db_block;
3965                                 goto failed_add_dir_block;
3966                         }
3967                 }
3968                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino,
3969                                                       blk, blockcnt);
3970                 if (pctx->errcode) {
3971                         pctx->blk = blk;
3972                         pctx->num = blockcnt;
3973                 failed_add_dir_block:
3974                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3975                         /* Should never get here */
3976                         ctx->flags |= E2F_FLAG_ABORT;
3977                         return BLOCK_ABORT;
3978                 }
3979         }
3980         return ret_code;
3981 }
3982
3983 static int process_bad_block(ext2_filsys fs,
3984                       blk64_t *block_nr,
3985                       e2_blkcnt_t blockcnt,
3986                       blk64_t ref_block EXT2FS_ATTR((unused)),
3987                       int ref_offset EXT2FS_ATTR((unused)),
3988                       void *priv_data)
3989 {
3990         struct process_block_struct *p;
3991         blk64_t         blk = *block_nr;
3992         blk64_t         first_block;
3993         dgrp_t          i;
3994         struct problem_context *pctx;
3995         e2fsck_t        ctx;
3996
3997         if (!blk)
3998                 return 0;
3999
4000         p = (struct process_block_struct *) priv_data;
4001         ctx = p->ctx;
4002         pctx = p->pctx;
4003
4004         pctx->ino = EXT2_BAD_INO;
4005         pctx->blk = blk;
4006         pctx->blkcount = blockcnt;
4007
4008         if ((blk < fs->super->s_first_data_block) ||
4009             (blk >= ext2fs_blocks_count(fs->super))) {
4010                 if (fix_problem(ctx, PR_1_BB_ILLEGAL_BLOCK_NUM, pctx)) {
4011                         *block_nr = 0;
4012                         return BLOCK_CHANGED;
4013                 } else
4014                         return 0;
4015         }
4016
4017         if (blockcnt < 0) {
4018                 if (ext2fs_test_block_bitmap2(p->fs_meta_blocks, blk)) {
4019                         p->bbcheck = 1;
4020                         if (fix_problem(ctx, PR_1_BB_FS_BLOCK, pctx)) {
4021                                 *block_nr = 0;
4022                                 return BLOCK_CHANGED;
4023                         }
4024                 } else if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4025                                                     blk)) {
4026                         p->bbcheck = 1;
4027                         if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK,
4028                                         pctx)) {
4029                                 *block_nr = 0;
4030                                 return BLOCK_CHANGED;
4031                         }
4032                         if (e2fsck_should_abort(ctx))
4033                                 return BLOCK_ABORT;
4034                 } else
4035                         mark_block_used(ctx, blk);
4036                 return 0;
4037         }
4038 #if 0
4039         printf ("DEBUG: Marking %u as bad.\n", blk);
4040 #endif
4041         ctx->fs_badblocks_count++;
4042         /*
4043          * If the block is not used, then mark it as used and return.
4044          * If it is already marked as found, this must mean that
4045          * there's an overlap between the filesystem table blocks
4046          * (bitmaps and inode table) and the bad block list.
4047          */
4048         if (!ext2fs_test_block_bitmap2(ctx->block_found_map, blk)) {
4049                 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4050                 return 0;
4051         }
4052         /*
4053          * Try to find the where the filesystem block was used...
4054          */
4055         first_block = fs->super->s_first_data_block;
4056
4057         for (i = 0; i < fs->group_desc_count; i++ ) {
4058                 pctx->group = i;
4059                 pctx->blk = blk;
4060                 if (!ext2fs_bg_has_super(fs, i))
4061                         goto skip_super;
4062                 if (blk == first_block) {
4063                         if (i == 0) {
4064                                 if (fix_problem(ctx,
4065                                                 PR_1_BAD_PRIMARY_SUPERBLOCK,
4066                                                 pctx)) {
4067                                         *block_nr = 0;
4068                                         return BLOCK_CHANGED;
4069                                 }
4070                                 return 0;
4071                         }
4072                         fix_problem(ctx, PR_1_BAD_SUPERBLOCK, pctx);
4073                         return 0;
4074                 }
4075                 if ((blk > first_block) &&
4076                     (blk <= first_block + fs->desc_blocks)) {
4077                         if (i == 0) {
4078                                 pctx->blk = *block_nr;
4079                                 if (fix_problem(ctx,
4080                         PR_1_BAD_PRIMARY_GROUP_DESCRIPTOR, pctx)) {
4081                                         *block_nr = 0;
4082                                         return BLOCK_CHANGED;
4083                                 }
4084                                 return 0;
4085                         }
4086                         fix_problem(ctx, PR_1_BAD_GROUP_DESCRIPTORS, pctx);
4087                         return 0;
4088                 }
4089         skip_super:
4090                 if (blk == ext2fs_block_bitmap_loc(fs, i)) {
4091                         if (fix_problem(ctx, PR_1_BB_BAD_BLOCK, pctx)) {
4092                                 ctx->invalid_block_bitmap_flag[i]++;
4093                                 ctx->invalid_bitmaps++;
4094                         }
4095                         return 0;
4096                 }
4097                 if (blk == ext2fs_inode_bitmap_loc(fs, i)) {
4098                         if (fix_problem(ctx, PR_1_IB_BAD_BLOCK, pctx)) {
4099                                 ctx->invalid_inode_bitmap_flag[i]++;
4100                                 ctx->invalid_bitmaps++;
4101                         }
4102                         return 0;
4103                 }
4104                 if ((blk >= ext2fs_inode_table_loc(fs, i)) &&
4105                     (blk < (ext2fs_inode_table_loc(fs, i) +
4106                             fs->inode_blocks_per_group))) {
4107                         /*
4108                          * If there are bad blocks in the inode table,
4109                          * the inode scan code will try to do
4110                          * something reasonable automatically.
4111                          */
4112                         return 0;
4113                 }
4114                 first_block += fs->super->s_blocks_per_group;
4115         }
4116         /*
4117          * If we've gotten to this point, then the only
4118          * possibility is that the bad block inode meta data
4119          * is using a bad block.
4120          */
4121         if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) ||
4122             (blk == p->inode->i_block[EXT2_DIND_BLOCK]) ||
4123             (blk == p->inode->i_block[EXT2_TIND_BLOCK])) {
4124                 p->bbcheck = 1;
4125                 if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, pctx)) {
4126                         *block_nr = 0;
4127                         return BLOCK_CHANGED;
4128                 }
4129                 if (e2fsck_should_abort(ctx))
4130                         return BLOCK_ABORT;
4131                 return 0;
4132         }
4133
4134         pctx->group = -1;
4135
4136         /* Warn user that the block wasn't claimed */
4137         fix_problem(ctx, PR_1_PROGERR_CLAIMED_BLOCK, pctx);
4138
4139         return 0;
4140 }
4141
4142 static void new_table_block(e2fsck_t ctx, blk64_t first_block, dgrp_t group,
4143                             const char *name, int num, blk64_t *new_block)
4144 {
4145         ext2_filsys fs = ctx->fs;
4146         dgrp_t          last_grp;
4147         blk64_t         old_block = *new_block;
4148         blk64_t         last_block;
4149         dgrp_t          flexbg;
4150         unsigned        flexbg_size;
4151         int             i, is_flexbg;
4152         char            *buf;
4153         struct problem_context  pctx;
4154
4155         clear_problem_context(&pctx);
4156
4157         pctx.group = group;
4158         pctx.blk = old_block;
4159         pctx.str = name;
4160
4161         /*
4162          * For flex_bg filesystems, first try to allocate the metadata
4163          * within the flex_bg, and if that fails then try finding the
4164          * space anywhere in the filesystem.
4165          */
4166         is_flexbg = ext2fs_has_feature_flex_bg(fs->super);
4167         if (is_flexbg) {
4168                 flexbg_size = 1U << fs->super->s_log_groups_per_flex;
4169                 flexbg = group / flexbg_size;
4170                 first_block = ext2fs_group_first_block2(fs,
4171                                                         flexbg_size * flexbg);
4172                 last_grp = group | (flexbg_size - 1);
4173                 if (last_grp >= fs->group_desc_count)
4174                         last_grp = fs->group_desc_count - 1;
4175                 last_block = ext2fs_group_last_block2(fs, last_grp);
4176         } else
4177                 last_block = ext2fs_group_last_block2(fs, group);
4178         pctx.errcode = ext2fs_get_free_blocks2(fs, first_block, last_block,
4179                                                num, ctx->block_found_map,
4180                                                new_block);
4181         if (is_flexbg && (pctx.errcode == EXT2_ET_BLOCK_ALLOC_FAIL))
4182                 pctx.errcode = ext2fs_get_free_blocks2(fs,
4183                                 fs->super->s_first_data_block,
4184                                 ext2fs_blocks_count(fs->super),
4185                                 num, ctx->block_found_map, new_block);
4186         if (pctx.errcode) {
4187                 pctx.num = num;
4188                 fix_problem(ctx, PR_1_RELOC_BLOCK_ALLOCATE, &pctx);
4189                 ext2fs_unmark_valid(fs);
4190                 ctx->flags |= E2F_FLAG_ABORT;
4191                 return;
4192         }
4193         pctx.errcode = ext2fs_get_mem(fs->blocksize, &buf);
4194         if (pctx.errcode) {
4195                 fix_problem(ctx, PR_1_RELOC_MEMORY_ALLOCATE, &pctx);
4196                 ext2fs_unmark_valid(fs);
4197                 ctx->flags |= E2F_FLAG_ABORT;
4198                 return;
4199         }
4200         ext2fs_mark_super_dirty(fs);
4201         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
4202         pctx.blk2 = *new_block;
4203         fix_problem(ctx, (old_block ? PR_1_RELOC_FROM_TO :
4204                           PR_1_RELOC_TO), &pctx);
4205         pctx.blk2 = 0;
4206         for (i = 0; i < num; i++) {
4207                 pctx.blk = i;
4208                 ext2fs_mark_block_bitmap2(ctx->block_found_map, (*new_block)+i);
4209                 if (old_block) {
4210                         pctx.errcode = io_channel_read_blk64(fs->io,
4211                                    old_block + i, 1, buf);
4212                         if (pctx.errcode)
4213                                 fix_problem(ctx, PR_1_RELOC_READ_ERR, &pctx);
4214                         pctx.blk = (*new_block) + i;
4215                         pctx.errcode = io_channel_write_blk64(fs->io, pctx.blk,
4216                                                               1, buf);
4217                 } else {
4218                         pctx.blk = (*new_block) + i;
4219                         pctx.errcode = ext2fs_zero_blocks2(fs, pctx.blk, 1,
4220                                                            NULL, NULL);
4221                 }
4222
4223                 if (pctx.errcode)
4224                         fix_problem(ctx, PR_1_RELOC_WRITE_ERR, &pctx);
4225         }
4226         ext2fs_free_mem(&buf);
4227 }
4228
4229 /*
4230  * This routine gets called at the end of pass 1 if bad blocks are
4231  * detected in the superblock, group descriptors, inode_bitmaps, or
4232  * block bitmaps.  At this point, all of the blocks have been mapped
4233  * out, so we can try to allocate new block(s) to replace the bad
4234  * blocks.
4235  */
4236 static void handle_fs_bad_blocks(e2fsck_t ctx)
4237 {
4238         ext2_filsys fs = ctx->fs;
4239         dgrp_t          i;
4240         blk64_t         first_block;
4241         blk64_t         new_blk;
4242
4243         for (i = 0; i < fs->group_desc_count; i++) {
4244                 first_block = ext2fs_group_first_block2(fs, i);
4245
4246                 if (ctx->invalid_block_bitmap_flag[i]) {
4247                         new_blk = ext2fs_block_bitmap_loc(fs, i);
4248                         new_table_block(ctx, first_block, i, _("block bitmap"),
4249                                         1, &new_blk);
4250                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
4251                 }
4252                 if (ctx->invalid_inode_bitmap_flag[i]) {
4253                         new_blk = ext2fs_inode_bitmap_loc(fs, i);
4254                         new_table_block(ctx, first_block, i, _("inode bitmap"),
4255                                         1, &new_blk);
4256                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
4257                 }
4258                 if (ctx->invalid_inode_table_flag[i]) {
4259                         new_blk = ext2fs_inode_table_loc(fs, i);
4260                         new_table_block(ctx, first_block, i, _("inode table"),
4261                                         fs->inode_blocks_per_group,
4262                                         &new_blk);
4263                         ext2fs_inode_table_loc_set(fs, i, new_blk);
4264                         ctx->flags |= E2F_FLAG_RESTART;
4265                 }
4266         }
4267         ctx->invalid_bitmaps = 0;
4268 }
4269
4270 /*
4271  * This routine marks all blocks which are used by the superblock,
4272  * group descriptors, inode bitmaps, and block bitmaps.
4273  */
4274 static void mark_table_blocks(e2fsck_t ctx)
4275 {
4276         ext2_filsys fs = ctx->fs;
4277         blk64_t b;
4278         dgrp_t  i;
4279         unsigned int    j;
4280         struct problem_context pctx;
4281
4282         clear_problem_context(&pctx);
4283
4284         for (i = 0; i < fs->group_desc_count; i++) {
4285                 pctx.group = i;
4286
4287                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_found_map);
4288                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_metadata_map);
4289
4290                 /*
4291                  * Mark the blocks used for the inode table
4292                  */
4293                 if (ext2fs_inode_table_loc(fs, i)) {
4294                         for (j = 0, b = ext2fs_inode_table_loc(fs, i);
4295                              j < fs->inode_blocks_per_group;
4296                              j++, b++) {
4297                                 if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4298                                                              b)) {
4299                                         pctx.blk = b;
4300                                         if (!ctx->invalid_inode_table_flag[i] &&
4301                                             fix_problem(ctx,
4302                                                 PR_1_ITABLE_CONFLICT, &pctx)) {
4303                                                 ctx->invalid_inode_table_flag[i]++;
4304                                                 ctx->invalid_bitmaps++;
4305                                         }
4306                                 } else {
4307                                     ext2fs_mark_block_bitmap2(
4308                                                 ctx->block_found_map, b);
4309                                     ext2fs_mark_block_bitmap2(
4310                                                 ctx->block_metadata_map, b);
4311                                 }
4312                         }
4313                 }
4314
4315                 /*
4316                  * Mark block used for the block bitmap
4317                  */
4318                 if (ext2fs_block_bitmap_loc(fs, i)) {
4319                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4320                                      ext2fs_block_bitmap_loc(fs, i))) {
4321                                 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
4322                                 if (fix_problem(ctx, PR_1_BB_CONFLICT, &pctx)) {
4323                                         ctx->invalid_block_bitmap_flag[i]++;
4324                                         ctx->invalid_bitmaps++;
4325                                 }
4326                         } else {
4327                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4328                                      ext2fs_block_bitmap_loc(fs, i));
4329                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4330                                      ext2fs_block_bitmap_loc(fs, i));
4331                         }
4332                 }
4333                 /*
4334                  * Mark block used for the inode bitmap
4335                  */
4336                 if (ext2fs_inode_bitmap_loc(fs, i)) {
4337                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4338                                      ext2fs_inode_bitmap_loc(fs, i))) {
4339                                 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
4340                                 if (fix_problem(ctx, PR_1_IB_CONFLICT, &pctx)) {
4341                                         ctx->invalid_inode_bitmap_flag[i]++;
4342                                         ctx->invalid_bitmaps++;
4343                                 }
4344                         } else {
4345                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4346                                      ext2fs_inode_bitmap_loc(fs, i));
4347                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4348                                      ext2fs_inode_bitmap_loc(fs, i));
4349                         }
4350                 }
4351         }
4352 }
4353
4354 /*
4355  * These subroutines short circuits ext2fs_get_blocks and
4356  * ext2fs_check_directory; we use them since we already have the inode
4357  * structure, so there's no point in letting the ext2fs library read
4358  * the inode again.
4359  */
4360 static errcode_t pass1_get_blocks(ext2_filsys fs, ext2_ino_t ino,
4361                                   blk_t *blocks)
4362 {
4363         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4364         int     i;
4365
4366         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4367                 return EXT2_ET_CALLBACK_NOTHANDLED;
4368
4369         for (i=0; i < EXT2_N_BLOCKS; i++)
4370                 blocks[i] = ctx->stashed_inode->i_block[i];
4371         return 0;
4372 }
4373
4374 static errcode_t pass1_read_inode(ext2_filsys fs, ext2_ino_t ino,
4375                                   struct ext2_inode *inode)
4376 {
4377         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4378
4379         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4380                 return EXT2_ET_CALLBACK_NOTHANDLED;
4381         *inode = *ctx->stashed_inode;
4382         return 0;
4383 }
4384
4385 static errcode_t pass1_write_inode(ext2_filsys fs, ext2_ino_t ino,
4386                             struct ext2_inode *inode)
4387 {
4388         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4389
4390         if ((ino == ctx->stashed_ino) && ctx->stashed_inode &&
4391                 (inode != ctx->stashed_inode))
4392                 *ctx->stashed_inode = *inode;
4393         return EXT2_ET_CALLBACK_NOTHANDLED;
4394 }
4395
4396 static errcode_t pass1_check_directory(ext2_filsys fs, ext2_ino_t ino)
4397 {
4398         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4399
4400         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4401                 return EXT2_ET_CALLBACK_NOTHANDLED;
4402
4403         if (!LINUX_S_ISDIR(ctx->stashed_inode->i_mode))
4404                 return EXT2_ET_NO_DIRECTORY;
4405         return 0;
4406 }
4407
4408 static errcode_t e2fsck_get_alloc_block(ext2_filsys fs, blk64_t goal,
4409                                         blk64_t *ret)
4410 {
4411         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4412         errcode_t       retval;
4413         blk64_t         new_block;
4414
4415         if (ctx->block_found_map) {
4416                 retval = ext2fs_new_block2(fs, goal, ctx->block_found_map,
4417                                            &new_block);
4418                 if (retval)
4419                         return retval;
4420                 if (fs->block_map) {
4421                         ext2fs_mark_block_bitmap2(fs->block_map, new_block);
4422                         ext2fs_mark_bb_dirty(fs);
4423                 }
4424         } else {
4425                 if (!fs->block_map) {
4426                         retval = ext2fs_read_block_bitmap(fs);
4427                         if (retval)
4428                                 return retval;
4429                 }
4430
4431                 retval = ext2fs_new_block2(fs, goal, fs->block_map, &new_block);
4432                 if (retval)
4433                         return retval;
4434         }
4435
4436         *ret = new_block;
4437         return (0);
4438 }
4439
4440 static errcode_t e2fsck_new_range(ext2_filsys fs, int flags, blk64_t goal,
4441                                   blk64_t len, blk64_t *pblk, blk64_t *plen)
4442 {
4443         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4444         errcode_t       retval;
4445
4446         if (ctx->block_found_map)
4447                 return ext2fs_new_range(fs, flags, goal, len,
4448                                         ctx->block_found_map, pblk, plen);
4449
4450         if (!fs->block_map) {
4451                 retval = ext2fs_read_block_bitmap(fs);
4452                 if (retval)
4453                         return retval;
4454         }
4455
4456         return ext2fs_new_range(fs, flags, goal, len, fs->block_map,
4457                                 pblk, plen);
4458 }
4459
4460 static void e2fsck_block_alloc_stats(ext2_filsys fs, blk64_t blk, int inuse)
4461 {
4462         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4463
4464         /* Never free a critical metadata block */
4465         if (ctx->block_found_map &&
4466             ctx->block_metadata_map &&
4467             inuse < 0 &&
4468             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk))
4469                 return;
4470
4471         if (ctx->block_found_map) {
4472                 if (inuse > 0)
4473                         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4474                 else
4475                         ext2fs_unmark_block_bitmap2(ctx->block_found_map, blk);
4476         }
4477 }
4478
4479 static void e2fsck_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
4480                                            blk_t num, int inuse)
4481 {
4482         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4483
4484         /* Never free a critical metadata block */
4485         if (ctx->block_found_map &&
4486             ctx->block_metadata_map &&
4487             inuse < 0 &&
4488             ext2fs_test_block_bitmap_range2(ctx->block_metadata_map, blk, num))
4489                 return;
4490
4491         if (ctx->block_found_map) {
4492                 if (inuse > 0)
4493                         ext2fs_mark_block_bitmap_range2(ctx->block_found_map,
4494                                                         blk, num);
4495                 else
4496                         ext2fs_unmark_block_bitmap_range2(ctx->block_found_map,
4497                                                         blk, num);
4498         }
4499 }
4500
4501 void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts)
4502 {
4503         ext2_filsys fs = ctx->fs;
4504
4505         if (use_shortcuts) {
4506                 fs->get_blocks = pass1_get_blocks;
4507                 fs->check_directory = pass1_check_directory;
4508                 fs->read_inode = pass1_read_inode;
4509                 fs->write_inode = pass1_write_inode;
4510                 ctx->stashed_ino = 0;
4511         } else {
4512                 fs->get_blocks = 0;
4513                 fs->check_directory = 0;
4514                 fs->read_inode = 0;
4515                 fs->write_inode = 0;
4516         }
4517 }
4518
4519 void e2fsck_intercept_block_allocations(e2fsck_t ctx)
4520 {
4521         ext2fs_set_alloc_block_callback(ctx->fs, e2fsck_get_alloc_block, 0);
4522         ext2fs_set_block_alloc_stats_callback(ctx->fs,
4523                                                 e2fsck_block_alloc_stats, 0);
4524         ext2fs_set_new_range_callback(ctx->fs, e2fsck_new_range, NULL);
4525         ext2fs_set_block_alloc_stats_range_callback(ctx->fs,
4526                                         e2fsck_block_alloc_stats_range, NULL);
4527 }