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 #include <assert.h>
  51 #ifdef HAVE_PTHREAD
  52 #include <pthread.h>
  53 #endif
  54
  55 #include "e2fsck.h"
  56 #include <ext2fs/ext2_ext_attr.h>
  57 /* todo remove this finally */
  58 #include <ext2fs/ext2fsP.h>
  59 #include <e2p/e2p.h>
  60
  61 #include "problem.h"
  62
  63 #ifdef NO_INLINE_FUNCS
  64 #define _INLINE_
  65 #else
  66 #define _INLINE_ inline
  67 #endif
  68
  69 #undef DEBUG
  70
  71 struct ea_quota {
  72         blk64_t blocks;
  73         __u64 inodes;
  74 };
  75
  76 static int process_block(ext2_filsys fs, blk64_t        *blocknr,
  77                          e2_blkcnt_t blockcnt, blk64_t ref_blk,
  78                          int ref_offset, void *priv_data);
  79 static int process_bad_block(ext2_filsys fs, blk64_t *block_nr,
  80                              e2_blkcnt_t blockcnt, blk64_t ref_blk,
  81                              int ref_offset, void *priv_data);
  82 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
  83                          char *block_buf,
  84                          const struct ea_quota *ea_ibody_quota);
  85 static void mark_table_blocks(e2fsck_t ctx);
  86 static void alloc_bb_map(e2fsck_t ctx);
  87 static void alloc_imagic_map(e2fsck_t ctx);
  88 static void mark_inode_bad(e2fsck_t ctx, ino_t ino);
  89 static void add_casefolded_dir(e2fsck_t ctx, ino_t ino);
  90 static void handle_fs_bad_blocks(e2fsck_t ctx);
  91 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b);
  92 static errcode_t scan_callback(ext2_filsys fs, ext2_inode_scan scan,
  93                                   dgrp_t group, void * priv_data);
  94 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
  95                                     char *block_buf, int adjust_sign);
  96 /* static char *describe_illegal_block(ext2_filsys fs, blk64_t block); */
  97
  98 struct process_block_struct {
  99         ext2_ino_t      ino;
 100         unsigned        is_dir:1, is_reg:1, clear:1, suppress:1,
 101                                 fragmented:1, compressed:1, bbcheck:1,
 102                                 inode_modified:1;
 103         blk64_t         num_blocks;
 104         blk64_t         max_blocks;
 105         blk64_t         last_block;
 106         e2_blkcnt_t     last_init_lblock;
 107         e2_blkcnt_t     last_db_block;
 108         int             num_illegal_blocks;
 109         blk64_t         previous_block;
 110         struct ext2_inode *inode;
 111         struct problem_context *pctx;
 112         ext2fs_block_bitmap fs_meta_blocks;
 113         e2fsck_t        ctx;
 114         blk64_t         next_lblock;
 115         struct extent_tree_info eti;
 116 };
 117
 118 struct process_inode_block {
 119         ext2_ino_t ino;
 120         struct ea_quota ea_ibody_quota;
 121         struct ext2_inode_large inode;
 122 };
 123
 124 struct scan_callback_struct {
 125         e2fsck_t                         ctx;
 126         char                            *block_buf;
 127         struct process_inode_block      *inodes_to_process;
 128         int                             *process_inode_count;
 129 };
 130
 131 static void process_inodes(e2fsck_t ctx, char *block_buf,
 132                            struct process_inode_block *inodes_to_process,
 133                            int *process_inode_count);
 134
 135 static __u64 ext2_max_sizes[EXT2_MAX_BLOCK_LOG_SIZE -
 136                             EXT2_MIN_BLOCK_LOG_SIZE + 1];
 137
 138 /*
 139  * Check to make sure a device inode is real.  Returns 1 if the device
 140  * checks out, 0 if not.
 141  *
 142  * Note: this routine is now also used to check FIFO's and Sockets,
 143  * since they have the same requirement; the i_block fields should be
 144  * zero.
 145  */
 146 int e2fsck_pass1_check_device_inode(ext2_filsys fs EXT2FS_ATTR((unused)),
 147                                     struct ext2_inode *inode)
 148 {
 149         int     i;
 150
 151         /*
 152          * If the index or extents flag is set, then this is a bogus
 153          * device/fifo/socket
 154          */
 155         if (inode->i_flags & (EXT2_INDEX_FL | EXT4_EXTENTS_FL))
 156                 return 0;
 157
 158         /*
 159          * We should be able to do the test below all the time, but
 160          * because the kernel doesn't forcibly clear the device
 161          * inode's additional i_block fields, there are some rare
 162          * occasions when a legitimate device inode will have non-zero
 163          * additional i_block fields.  So for now, we only complain
 164          * when the immutable flag is set, which should never happen
 165          * for devices.  (And that's when the problem is caused, since
 166          * you can't set or clear immutable flags for devices.)  Once
 167          * the kernel has been fixed we can change this...
 168          */
 169         if (inode->i_flags & (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)) {
 170                 for (i=4; i < EXT2_N_BLOCKS; i++)
 171                         if (inode->i_block[i])
 172                                 return 0;
 173         }
 174         return 1;
 175 }
 176
 177 /*
 178  * Check to make sure a symlink inode is real.  Returns 1 if the symlink
 179  * checks out, 0 if not.
 180  */
 181 int e2fsck_pass1_check_symlink(ext2_filsys fs, ext2_ino_t ino,
 182                                struct ext2_inode *inode, char *buf)
 183 {
 184         unsigned int buflen;
 185         unsigned int len;
 186
 187         if ((inode->i_size_high || inode->i_size == 0) ||
 188             (inode->i_flags & EXT2_INDEX_FL))
 189                 return 0;
 190
 191         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
 192                 size_t inline_size;
 193
 194                 if (inode->i_flags & EXT4_EXTENTS_FL)
 195                         return 0;
 196                 if (ext2fs_inline_data_size(fs, ino, &inline_size))
 197                         return 0;
 198                 if (inode->i_size != inline_size)
 199                         return 0;
 200
 201                 return 1;
 202         }
 203
 204         if (ext2fs_is_fast_symlink(inode)) {
 205                 if (inode->i_flags & EXT4_EXTENTS_FL)
 206                         return 0;
 207                 buf = (char *)inode->i_block;
 208                 buflen = sizeof(inode->i_block);
 209         } else {
 210                 ext2_extent_handle_t    handle;
 211                 struct ext2_extent_info info;
 212                 struct ext2fs_extent    extent;
 213                 blk64_t blk;
 214                 int i;
 215
 216                 if (inode->i_flags & EXT4_EXTENTS_FL) {
 217                         if (ext2fs_extent_open2(fs, ino, inode, &handle))
 218                                 return 0;
 219                         if (ext2fs_extent_get_info(handle, &info) ||
 220                             (info.num_entries != 1) ||
 221                             (info.max_depth != 0)) {
 222                                 ext2fs_extent_free(handle);
 223                                 return 0;
 224                         }
 225                         if (ext2fs_extent_get(handle, EXT2_EXTENT_ROOT,
 226                                               &extent) ||
 227                             (extent.e_lblk != 0) ||
 228                             (extent.e_len != 1)) {
 229                                 ext2fs_extent_free(handle);
 230                                 return 0;
 231                         }
 232                         blk = extent.e_pblk;
 233                         ext2fs_extent_free(handle);
 234                 } else {
 235                         blk = inode->i_block[0];
 236
 237                         for (i = 1; i < EXT2_N_BLOCKS; i++)
 238                                 if (inode->i_block[i])
 239                                         return 0;
 240                 }
 241
 242                 if (blk < fs->super->s_first_data_block ||
 243                     blk >= ext2fs_blocks_count(fs->super))
 244                         return 0;
 245
 246                 if (io_channel_read_blk64(fs->io, blk, 1, buf))
 247                         return 0;
 248
 249                 buflen = fs->blocksize;
 250         }
 251
 252         if (inode->i_flags & EXT4_ENCRYPT_FL)
 253                 len = ext2fs_le16_to_cpu(*(__u16 *)buf) + 2;
 254         else
 255                 len = strnlen(buf, buflen);
 256
 257         if (len >= buflen)
 258                 return 0;
 259
 260         if (len != inode->i_size)
 261                 return 0;
 262         return 1;
 263 }
 264
 265 /*
 266  * If the extents or inlinedata flags are set on the inode, offer to clear 'em.
 267  */
 268 #define BAD_SPECIAL_FLAGS (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)
 269 static void check_extents_inlinedata(e2fsck_t ctx,
 270                                      struct problem_context *pctx)
 271 {
 272         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 273                 return;
 274
 275         if (!fix_problem(ctx, PR_1_SPECIAL_EXTENTS_IDATA, pctx))
 276                 return;
 277
 278         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 279         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 280 }
 281 #undef BAD_SPECIAL_FLAGS
 282
 283 /*
 284  * If the immutable (or append-only) flag is set on the inode, offer
 285  * to clear it.
 286  */
 287 #define BAD_SPECIAL_FLAGS (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)
 288 static void check_immutable(e2fsck_t ctx, struct problem_context *pctx)
 289 {
 290         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 291                 return;
 292
 293         if (!fix_problem(ctx, PR_1_SET_IMMUTABLE, pctx))
 294                 return;
 295
 296         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 297         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 298 }
 299
 300 /*
 301  * If device, fifo or socket, check size is zero -- if not offer to
 302  * clear it
 303  */
 304 static void check_size(e2fsck_t ctx, struct problem_context *pctx)
 305 {
 306         struct ext2_inode *inode = pctx->inode;
 307
 308         if (EXT2_I_SIZE(inode) == 0)
 309                 return;
 310
 311         if (!fix_problem(ctx, PR_1_SET_NONZSIZE, pctx))
 312                 return;
 313
 314         ext2fs_inode_size_set(ctx->fs, inode, 0);
 315         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 316 }
 317
 318 /*
 319  * For a given size, calculate how many blocks would be charged towards quota.
 320  */
 321 static blk64_t size_to_quota_blocks(ext2_filsys fs, size_t size)
 322 {
 323         blk64_t clusters;
 324
 325         clusters = DIV_ROUND_UP(size, fs->blocksize << fs->cluster_ratio_bits);
 326         return EXT2FS_C2B(fs, clusters);
 327 }
 328
 329 /*
 330  * Check validity of EA inode. Return 0 if EA inode is valid, otherwise return
 331  * the problem code.
 332  */
 333 static problem_t check_large_ea_inode(e2fsck_t ctx,
 334                                       struct ext2_ext_attr_entry *entry,
 335                                       struct problem_context *pctx,
 336                                       blk64_t *quota_blocks)
 337 {
 338         struct ext2_inode inode;
 339         __u32 hash;
 340         errcode_t retval;
 341
 342         /* Check if inode is within valid range */
 343         if ((entry->e_value_inum < EXT2_FIRST_INODE(ctx->fs->super)) ||
 344             (entry->e_value_inum > ctx->fs->super->s_inodes_count)) {
 345                 pctx->num = entry->e_value_inum;
 346                 return PR_1_ATTR_VALUE_EA_INODE;
 347         }
 348
 349         e2fsck_read_inode(ctx, entry->e_value_inum, &inode, "pass1");
 350
 351         retval = ext2fs_ext_attr_hash_entry2(ctx->fs, entry, NULL, &hash);
 352         if (retval) {
 353                 com_err("check_large_ea_inode", retval,
 354                         _("while hashing entry with e_value_inum = %u"),
 355                         entry->e_value_inum);
 356                 fatal_error(ctx, 0);
 357         }
 358
 359         if (hash == entry->e_hash) {
 360                 *quota_blocks = size_to_quota_blocks(ctx->fs,
 361                                                      entry->e_value_size);
 362         } else {
 363                 /* This might be an old Lustre-style ea_inode reference. */
 364                 if (inode.i_mtime == pctx->ino &&
 365                     inode.i_generation == pctx->inode->i_generation) {
 366                         *quota_blocks = 0;
 367                 } else {
 368                         /* If target inode is also missing EA_INODE flag,
 369                          * this is likely to be a bad reference.
 370                          */
 371                         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 372                                 pctx->num = entry->e_value_inum;
 373                                 return PR_1_ATTR_VALUE_EA_INODE;
 374                         } else {
 375                                 pctx->num = entry->e_hash;
 376                                 return PR_1_ATTR_HASH;
 377                         }
 378                 }
 379         }
 380
 381         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 382                 pctx->num = entry->e_value_inum;
 383                 if (fix_problem(ctx, PR_1_ATTR_SET_EA_INODE_FL, pctx)) {
 384                         inode.i_flags |= EXT4_EA_INODE_FL;
 385                         ext2fs_write_inode(ctx->fs, entry->e_value_inum,
 386                                            &inode);
 387                 } else {
 388                         return PR_1_ATTR_NO_EA_INODE_FL;
 389                 }
 390         }
 391         return 0;
 392 }
 393
 394 static void inc_ea_inode_refs(e2fsck_t ctx, struct problem_context *pctx,
 395                               struct ext2_ext_attr_entry *first, void *end)
 396 {
 397         struct ext2_ext_attr_entry *entry;
 398
 399         for (entry = first;
 400              (void *)entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry);
 401              entry = EXT2_EXT_ATTR_NEXT(entry)) {
 402                 if (!entry->e_value_inum)
 403                         continue;
 404                 if (!ctx->ea_inode_refs) {
 405                         pctx->errcode = ea_refcount_create(0,
 406                                                            &ctx->ea_inode_refs);
 407                         if (pctx->errcode) {
 408                                 pctx->num = 4;
 409                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
 410                                 ctx->flags |= E2F_FLAG_ABORT;
 411                                 return;
 412                         }
 413                 }
 414                 ea_refcount_increment(ctx->ea_inode_refs, entry->e_value_inum,
 415                                       0);
 416         }
 417 }
 418
 419 static void check_ea_in_inode(e2fsck_t ctx, struct problem_context *pctx,
 420                               struct ea_quota *ea_ibody_quota)
 421 {
 422         struct ext2_super_block *sb = ctx->fs->super;
 423         struct ext2_inode_large *inode;
 424         struct ext2_ext_attr_entry *entry;
 425         char *start, *header, *end;
 426         unsigned int storage_size, remain;
 427         problem_t problem = 0;
 428         region_t region = 0;
 429
 430         ea_ibody_quota->blocks = 0;
 431         ea_ibody_quota->inodes = 0;
 432
 433         inode = (struct ext2_inode_large *) pctx->inode;
 434         storage_size = EXT2_INODE_SIZE(ctx->fs->super) - EXT2_GOOD_OLD_INODE_SIZE -
 435                 inode->i_extra_isize;
 436         header = ((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 437                  inode->i_extra_isize;
 438         end = header + storage_size;
 439         start = header + sizeof(__u32);
 440         entry = (struct ext2_ext_attr_entry *) start;
 441
 442         /* scan all entry's headers first */
 443
 444         /* take finish entry 0UL into account */
 445         remain = storage_size - sizeof(__u32);
 446
 447         region = region_create(0, storage_size);
 448         if (!region) {
 449                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
 450                 problem = 0;
 451                 ctx->flags |= E2F_FLAG_ABORT;
 452                 return;
 453         }
 454         if (region_allocate(region, 0, sizeof(__u32))) {
 455                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 456                 goto fix;
 457         }
 458
 459         while (remain >= sizeof(struct ext2_ext_attr_entry) &&
 460                !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 461                 __u32 hash;
 462
 463                 if (region_allocate(region, (char *)entry - (char *)header,
 464                                     EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
 465                         problem = PR_1_INODE_EA_ALLOC_COLLISION;
 466                         goto fix;
 467                 }
 468
 469                 /* header eats this space */
 470                 remain -= sizeof(struct ext2_ext_attr_entry);
 471
 472                 /* is attribute name valid? */
 473                 if (EXT2_EXT_ATTR_SIZE(entry->e_name_len) > remain) {
 474                         pctx->num = entry->e_name_len;
 475                         problem = PR_1_ATTR_NAME_LEN;
 476                         goto fix;
 477                 }
 478
 479                 /* attribute len eats this space */
 480                 remain -= EXT2_EXT_ATTR_SIZE(entry->e_name_len);
 481
 482                 if (entry->e_value_inum == 0) {
 483                         /* check value size */
 484                         if (entry->e_value_size > remain) {
 485                                 pctx->num = entry->e_value_size;
 486                                 problem = PR_1_ATTR_VALUE_SIZE;
 487                                 goto fix;
 488                         }
 489
 490                         if (entry->e_value_size &&
 491                             region_allocate(region,
 492                                             sizeof(__u32) + entry->e_value_offs,
 493                                             EXT2_EXT_ATTR_SIZE(
 494                                                 entry->e_value_size))) {
 495                                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 496                                 goto fix;
 497                         }
 498
 499                         hash = ext2fs_ext_attr_hash_entry(entry,
 500                                                           start + entry->e_value_offs);
 501
 502                         /* e_hash may be 0 in older inode's ea */
 503                         if (entry->e_hash != 0 && entry->e_hash != hash) {
 504                                 pctx->num = entry->e_hash;
 505                                 problem = PR_1_ATTR_HASH;
 506                                 goto fix;
 507                         }
 508                 } else {
 509                         blk64_t quota_blocks;
 510
 511                         problem = check_large_ea_inode(ctx, entry, pctx,
 512                                                        &quota_blocks);
 513                         if (problem != 0)
 514                                 goto fix;
 515
 516                         ea_ibody_quota->blocks += quota_blocks;
 517                         ea_ibody_quota->inodes++;
 518                 }
 519
 520                 /* If EA value is stored in external inode then it does not
 521                  * consume space here */
 522                 if (entry->e_value_inum == 0)
 523                         remain -= entry->e_value_size;
 524
 525                 entry = EXT2_EXT_ATTR_NEXT(entry);
 526         }
 527
 528         if (region_allocate(region, (char *)entry - (char *)header,
 529                             sizeof(__u32))) {
 530                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 531                 goto fix;
 532         }
 533 fix:
 534         if (region)
 535                 region_free(region);
 536         /*
 537          * it seems like a corruption. it's very unlikely we could repair
 538          * EA(s) in automatic fashion -bzzz
 539          */
 540         if (problem == 0 || !fix_problem(ctx, problem, pctx)) {
 541                 inc_ea_inode_refs(ctx, pctx,
 542                                   (struct ext2_ext_attr_entry *)start, end);
 543                 return;
 544         }
 545
 546         /* simply remove all possible EA(s) */
 547         *((__u32 *)header) = 0UL;
 548         e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 549                                 EXT2_INODE_SIZE(sb), "pass1");
 550         ea_ibody_quota->blocks = 0;
 551         ea_ibody_quota->inodes = 0;
 552 }
 553
 554 static int check_inode_extra_negative_epoch(__u32 xtime, __u32 extra) {
 555         return (xtime & (1U << 31)) != 0 &&
 556                 (extra & EXT4_EPOCH_MASK) == EXT4_EPOCH_MASK;
 557 }
 558
 559 #define CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, xtime) \
 560         check_inode_extra_negative_epoch(inode->i_##xtime, \
 561                                          inode->i_##xtime##_extra)
 562
 563 /* When today's date is earlier than 2242, we assume that atimes,
 564  * ctimes, crtimes, and mtimes with years in the range 2310..2378 are
 565  * actually pre-1970 dates mis-encoded.
 566  */
 567 #define EXT4_EXTRA_NEGATIVE_DATE_CUTOFF 2 * (1LL << 32)
 568
 569 static void check_inode_extra_space(e2fsck_t ctx, struct problem_context *pctx,
 570                                     struct ea_quota *ea_ibody_quota)
 571 {
 572         struct ext2_super_block *sb = ctx->fs->super;
 573         struct ext2_inode_large *inode;
 574         __u32 *eamagic;
 575         int min, max;
 576
 577         ea_ibody_quota->blocks = 0;
 578         ea_ibody_quota->inodes = 0;
 579
 580         inode = (struct ext2_inode_large *) pctx->inode;
 581         if (EXT2_INODE_SIZE(sb) == EXT2_GOOD_OLD_INODE_SIZE) {
 582                 /* this isn't large inode. so, nothing to check */
 583                 return;
 584         }
 585
 586 #if 0
 587         printf("inode #%u, i_extra_size %d\n", pctx->ino,
 588                         inode->i_extra_isize);
 589 #endif
 590         /* i_extra_isize must cover i_extra_isize + i_checksum_hi at least */
 591         min = sizeof(inode->i_extra_isize) + sizeof(inode->i_checksum_hi);
 592         max = EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE;
 593         /*
 594          * For now we will allow i_extra_isize to be 0, but really
 595          * implementations should never allow i_extra_isize to be 0
 596          */
 597         if (inode->i_extra_isize &&
 598             (inode->i_extra_isize < min || inode->i_extra_isize > max ||
 599              inode->i_extra_isize & 3)) {
 600                 if (!fix_problem(ctx, PR_1_EXTRA_ISIZE, pctx))
 601                         return;
 602                 if (inode->i_extra_isize < min || inode->i_extra_isize > max)
 603                         inode->i_extra_isize = sb->s_want_extra_isize;
 604                 else
 605                         inode->i_extra_isize = (inode->i_extra_isize + 3) & ~3;
 606                 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 607                                         EXT2_INODE_SIZE(sb), "pass1");
 608         }
 609
 610         /* check if there is no place for an EA header */
 611         if (inode->i_extra_isize >= max - sizeof(__u32))
 612                 return;
 613
 614         eamagic = (__u32 *) (((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 615                         inode->i_extra_isize);
 616         if (*eamagic == EXT2_EXT_ATTR_MAGIC) {
 617                 /* it seems inode has an extended attribute(s) in body */
 618                 check_ea_in_inode(ctx, pctx, ea_ibody_quota);
 619         }
 620
 621         /*
 622          * If the inode's extended atime (ctime, crtime, mtime) is stored in
 623          * the old, invalid format, repair it.
 624          */
 625         if (((sizeof(time_t) <= 4) ||
 626              (((sizeof(time_t) > 4) &&
 627                ctx->now < EXT4_EXTRA_NEGATIVE_DATE_CUTOFF))) &&
 628             (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime) ||
 629              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime) ||
 630              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime) ||
 631              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))) {
 632
 633                 if (!fix_problem(ctx, PR_1_EA_TIME_OUT_OF_RANGE, pctx))
 634                         return;
 635
 636                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime))
 637                         inode->i_atime_extra &= ~EXT4_EPOCH_MASK;
 638                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime))
 639                         inode->i_ctime_extra &= ~EXT4_EPOCH_MASK;
 640                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime))
 641                         inode->i_crtime_extra &= ~EXT4_EPOCH_MASK;
 642                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))
 643                         inode->i_mtime_extra &= ~EXT4_EPOCH_MASK;
 644                 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 645                                         EXT2_INODE_SIZE(sb), "pass1");
 646         }
 647
 648 }
 649
 650 /*
 651  * Check to see if the inode might really be a directory, despite i_mode
 652  *
 653  * This is a lot of complexity for something for which I'm not really
 654  * convinced happens frequently in the wild.  If for any reason this
 655  * causes any problems, take this code out.
 656  * [tytso:20070331.0827EDT]
 657  */
 658 static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx,
 659                                 char *buf)
 660 {
 661         struct ext2_inode *inode = pctx->inode;
 662         struct ext2_dir_entry   *dirent;
 663         errcode_t               retval;
 664         blk64_t                 blk;
 665         unsigned int            i, rec_len, not_device = 0;
 666         int                     extent_fs;
 667         int                     inlinedata_fs;
 668
 669         /*
 670          * If the mode looks OK, we believe it.  If the first block in
 671          * the i_block array is 0, this cannot be a directory. If the
 672          * inode is extent-mapped, it is still the case that the latter
 673          * cannot be 0 - the magic number in the extent header would make
 674          * it nonzero.
 675          */
 676         if (LINUX_S_ISDIR(inode->i_mode) || LINUX_S_ISREG(inode->i_mode) ||
 677             LINUX_S_ISLNK(inode->i_mode) || inode->i_block[0] == 0)
 678                 return;
 679
 680         /*
 681          * Check the block numbers in the i_block array for validity:
 682          * zero blocks are skipped (but the first one cannot be zero -
 683          * see above), other blocks are checked against the first and
 684          * max data blocks (from the the superblock) and against the
 685          * block bitmap. Any invalid block found means this cannot be
 686          * a directory.
 687          *
 688          * If there are non-zero blocks past the fourth entry, then
 689          * this cannot be a device file: we remember that for the next
 690          * check.
 691          *
 692          * For extent mapped files, we don't do any sanity checking:
 693          * just try to get the phys block of logical block 0 and run
 694          * with it.
 695          *
 696          * For inline data files, we just try to get the size of inline
 697          * data.  If it's true, we will treat it as a directory.
 698          */
 699
 700         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
 701         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
 702         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL)) {
 703                 size_t size;
 704                 __u32 dotdot;
 705                 unsigned int rec_len2;
 706                 struct ext2_dir_entry de;
 707
 708                 if (ext2fs_inline_data_size(ctx->fs, pctx->ino, &size))
 709                         return;
 710                 /*
 711                  * If the size isn't a multiple of 4, it's probably not a
 712                  * directory??
 713                  */
 714                 if (size & 3)
 715                         return;
 716                 /*
 717                  * If the first 10 bytes don't look like a directory entry,
 718                  * it's probably not a directory.
 719                  */
 720                 memcpy(&dotdot, inode->i_block, sizeof(dotdot));
 721                 memcpy(&de, ((char *)inode->i_block) + EXT4_INLINE_DATA_DOTDOT_SIZE,
 722                        EXT2_DIR_REC_LEN(0));
 723                 dotdot = ext2fs_le32_to_cpu(dotdot);
 724                 de.inode = ext2fs_le32_to_cpu(de.inode);
 725                 de.rec_len = ext2fs_le16_to_cpu(de.rec_len);
 726                 ext2fs_get_rec_len(ctx->fs, &de, &rec_len2);
 727                 if (dotdot >= ctx->fs->super->s_inodes_count ||
 728                     (dotdot < EXT2_FIRST_INO(ctx->fs->super) &&
 729                      dotdot != EXT2_ROOT_INO) ||
 730                     de.inode >= ctx->fs->super->s_inodes_count ||
 731                     (de.inode < EXT2_FIRST_INO(ctx->fs->super) &&
 732                      de.inode != 0) ||
 733                     rec_len2 > EXT4_MIN_INLINE_DATA_SIZE -
 734                               EXT4_INLINE_DATA_DOTDOT_SIZE)
 735                         return;
 736                 /* device files never have a "system.data" entry */
 737                 goto isdir;
 738         } else if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) {
 739                 /* extent mapped */
 740                 if  (ext2fs_bmap2(ctx->fs, pctx->ino, inode, 0, 0, 0, 0,
 741                                  &blk))
 742                         return;
 743                 /* device files are never extent mapped */
 744                 not_device++;
 745         } else {
 746                 for (i=0; i < EXT2_N_BLOCKS; i++) {
 747                         blk = inode->i_block[i];
 748                         if (!blk)
 749                                 continue;
 750                         if (i >= 4)
 751                                 not_device++;
 752
 753                         if (blk < ctx->fs->super->s_first_data_block ||
 754                             blk >= ext2fs_blocks_count(ctx->fs->super) ||
 755                             ext2fs_fast_test_block_bitmap2(ctx->block_found_map,
 756                                                            blk))
 757                                 return; /* Invalid block, can't be dir */
 758                 }
 759                 blk = inode->i_block[0];
 760         }
 761
 762         /*
 763          * If the mode says this is a device file and the i_links_count field
 764          * is sane and we have not ruled it out as a device file previously,
 765          * we declare it a device file, not a directory.
 766          */
 767         if ((LINUX_S_ISCHR(inode->i_mode) || LINUX_S_ISBLK(inode->i_mode)) &&
 768             (inode->i_links_count == 1) && !not_device)
 769                 return;
 770
 771         /* read the first block */
 772         ehandler_operation(_("reading directory block"));
 773         retval = ext2fs_read_dir_block4(ctx->fs, blk, buf, 0, pctx->ino);
 774         ehandler_operation(0);
 775         if (retval)
 776                 return;
 777
 778         dirent = (struct ext2_dir_entry *) buf;
 779         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 780         if (retval)
 781                 return;
 782         if ((ext2fs_dirent_name_len(dirent) != 1) ||
 783             (dirent->name[0] != '.') ||
 784             (dirent->inode != pctx->ino) ||
 785             (rec_len < 12) ||
 786             (rec_len % 4) ||
 787             (rec_len >= ctx->fs->blocksize - 12))
 788                 return;
 789
 790         dirent = (struct ext2_dir_entry *) (buf + rec_len);
 791         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 792         if (retval)
 793                 return;
 794         if ((ext2fs_dirent_name_len(dirent) != 2) ||
 795             (dirent->name[0] != '.') ||
 796             (dirent->name[1] != '.') ||
 797             (rec_len < 12) ||
 798             (rec_len % 4))
 799                 return;
 800
 801 isdir:
 802         if (fix_problem(ctx, PR_1_TREAT_AS_DIRECTORY, pctx)) {
 803                 inode->i_mode = (inode->i_mode & 07777) | LINUX_S_IFDIR;
 804                 e2fsck_write_inode_full(ctx, pctx->ino, inode,
 805                                         EXT2_INODE_SIZE(ctx->fs->super),
 806                                         "check_is_really_dir");
 807         }
 808 }
 809
 810 extern errcode_t e2fsck_setup_icount(e2fsck_t ctx, const char *icount_name,
 811                                      int flags, ext2_icount_t hint,
 812                                      ext2_icount_t *ret)
 813 {
 814         unsigned int            threshold;
 815         unsigned int            save_type;
 816         ext2_ino_t              num_dirs;
 817         errcode_t               retval;
 818         char                    *tdb_dir;
 819         int                     enable;
 820
 821         *ret = 0;
 822
 823         profile_get_string(ctx->profile, "scratch_files", "directory", 0, 0,
 824                            &tdb_dir);
 825         profile_get_uint(ctx->profile, "scratch_files",
 826                          "numdirs_threshold", 0, 0, &threshold);
 827         profile_get_boolean(ctx->profile, "scratch_files",
 828                             "icount", 0, 1, &enable);
 829
 830         retval = ext2fs_get_num_dirs(ctx->fs, &num_dirs);
 831         if (retval)
 832                 num_dirs = 1024;        /* Guess */
 833
 834         if (enable && tdb_dir && !access(tdb_dir, W_OK) &&
 835             (!threshold || num_dirs > threshold)) {
 836                 retval = ext2fs_create_icount_tdb(ctx->fs, tdb_dir,
 837                                                   flags, ret);
 838                 if (retval == 0)
 839                         return 0;
 840         }
 841         e2fsck_set_bitmap_type(ctx->fs, EXT2FS_BMAP64_RBTREE, icount_name,
 842                                &save_type);
 843         if (ctx->options & E2F_OPT_ICOUNT_FULLMAP)
 844                 flags |= EXT2_ICOUNT_OPT_FULLMAP;
 845         retval = ext2fs_create_icount2(ctx->fs, flags, 0, hint, ret);
 846         ctx->fs->default_bitmap_type = save_type;
 847         return retval;
 848 }
 849
 850 static errcode_t recheck_bad_inode_checksum(ext2_filsys fs, ext2_ino_t ino,
 851                                             e2fsck_t ctx,
 852                                             struct problem_context *pctx)
 853 {
 854         errcode_t retval;
 855         struct ext2_inode_large inode;
 856
 857         /*
 858          * Reread inode.  If we don't see checksum error, then this inode
 859          * has been fixed elsewhere.
 860          */
 861         ctx->stashed_ino = 0;
 862         retval = ext2fs_read_inode_full(fs, ino, (struct ext2_inode *)&inode,
 863                                         sizeof(inode));
 864         if (retval && retval != EXT2_ET_INODE_CSUM_INVALID)
 865                 return retval;
 866         if (!retval)
 867                 return 0;
 868
 869         /*
 870          * Checksum still doesn't match.  That implies that the inode passes
 871          * all the sanity checks, so maybe the checksum is simply corrupt.
 872          * See if the user will go for fixing that.
 873          */
 874         if (!fix_problem(ctx, PR_1_INODE_ONLY_CSUM_INVALID, pctx))
 875                 return 0;
 876
 877         retval = ext2fs_write_inode_full(fs, ino, (struct ext2_inode *)&inode,
 878                                          sizeof(inode));
 879         return retval;
 880 }
 881
 882 static void reserve_block_for_root_repair(e2fsck_t ctx)
 883 {
 884         blk64_t         blk = 0;
 885         errcode_t       err;
 886         ext2_filsys     fs = ctx->fs;
 887
 888         ctx->root_repair_block = 0;
 889         if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO))
 890                 return;
 891
 892         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 893         if (err)
 894                 return;
 895         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 896         ctx->root_repair_block = blk;
 897 }
 898
 899 static void reserve_block_for_lnf_repair(e2fsck_t ctx)
 900 {
 901         blk64_t         blk = 0;
 902         errcode_t       err;
 903         ext2_filsys     fs = ctx->fs;
 904         static const char name[] = "lost+found";
 905         ext2_ino_t      ino;
 906
 907         ctx->lnf_repair_block = 0;
 908         if (!ext2fs_lookup(fs, EXT2_ROOT_INO, name, sizeof(name)-1, 0, &ino))
 909                 return;
 910
 911         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 912         if (err)
 913                 return;
 914         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 915         ctx->lnf_repair_block = blk;
 916 }
 917
 918 static errcode_t get_inline_data_ea_size(ext2_filsys fs, ext2_ino_t ino,
 919                                          size_t *sz)
 920 {
 921         void *p;
 922         struct ext2_xattr_handle *handle;
 923         errcode_t retval;
 924
 925         retval = ext2fs_xattrs_open(fs, ino, &handle);
 926         if (retval)
 927                 return retval;
 928
 929         retval = ext2fs_xattrs_read(handle);
 930         if (retval)
 931                 goto err;
 932
 933         retval = ext2fs_xattr_get(handle, "system.data", &p, sz);
 934         if (retval)
 935                 goto err;
 936         ext2fs_free_mem(&p);
 937 err:
 938         (void) ext2fs_xattrs_close(&handle);
 939         return retval;
 940 }
 941
 942 static void finish_processing_inode(e2fsck_t ctx, ext2_ino_t ino,
 943                                     struct problem_context *pctx,
 944                                     int failed_csum)
 945 {
 946         if (!failed_csum)
 947                 return;
 948
 949         /*
 950          * If the inode failed the checksum and the user didn't
 951          * clear the inode, test the checksum again -- if it still
 952          * fails, ask the user if the checksum should be corrected.
 953          */
 954         pctx->errcode = recheck_bad_inode_checksum(ctx->fs, ino, ctx, pctx);
 955         if (pctx->errcode)
 956                 ctx->flags |= E2F_FLAG_ABORT;
 957 }
 958 #define FINISH_INODE_LOOP(ctx, ino, pctx, failed_csum) \
 959         do { \
 960                 finish_processing_inode((ctx), (ino), (pctx), (failed_csum)); \
 961                 if ((ctx)->flags & E2F_FLAG_ABORT) \
 962                         return; \
 963         } while (0)
 964
 965 static int could_be_block_map(ext2_filsys fs, struct ext2_inode *inode)
 966 {
 967         __u32 x;
 968         int i;
 969
 970         for (i = 0; i < EXT2_N_BLOCKS; i++) {
 971                 x = inode->i_block[i];
 972 #ifdef WORDS_BIGENDIAN
 973                 x = ext2fs_swab32(x);
 974 #endif
 975                 if (x >= ext2fs_blocks_count(fs->super))
 976                         return 0;
 977         }
 978
 979         return 1;
 980 }
 981
 982 /*
 983  * Figure out what to do with an inode that has both extents and inline data
 984  * inode flags set.  Returns -1 if we decide to erase the inode, 0 otherwise.
 985  */
 986 static int fix_inline_data_extents_file(e2fsck_t ctx,
 987                                         ext2_ino_t ino,
 988                                         struct ext2_inode *inode,
 989                                         int inode_size,
 990                                         struct problem_context *pctx)
 991 {
 992         size_t max_inline_ea_size;
 993         ext2_filsys fs = ctx->fs;
 994         int dirty = 0;
 995
 996         /* Both feature flags not set?  Just run the regular checks */
 997         if (!ext2fs_has_feature_extents(fs->super) &&
 998             !ext2fs_has_feature_inline_data(fs->super))
 999                 return 0;
1000
1001         /* Clear both flags if it's a special file */
1002         if (LINUX_S_ISCHR(inode->i_mode) ||
1003             LINUX_S_ISBLK(inode->i_mode) ||
1004             LINUX_S_ISFIFO(inode->i_mode) ||
1005             LINUX_S_ISSOCK(inode->i_mode)) {
1006                 check_extents_inlinedata(ctx, pctx);
1007                 return 0;
1008         }
1009
1010         /* If it looks like an extent tree, try to clear inlinedata */
1011         if (ext2fs_extent_header_verify(inode->i_block,
1012                                  sizeof(inode->i_block)) == 0 &&
1013             fix_problem(ctx, PR_1_CLEAR_INLINE_DATA_FOR_EXTENT, pctx)) {
1014                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1015                 dirty = 1;
1016                 goto out;
1017         }
1018
1019         /* If it looks short enough to be inline data, try to clear extents */
1020         if (inode_size > EXT2_GOOD_OLD_INODE_SIZE)
1021                 max_inline_ea_size = inode_size -
1022                                      (EXT2_GOOD_OLD_INODE_SIZE +
1023                                       ((struct ext2_inode_large *)inode)->i_extra_isize);
1024         else
1025                 max_inline_ea_size = 0;
1026         if (EXT2_I_SIZE(inode) <
1027             EXT4_MIN_INLINE_DATA_SIZE + max_inline_ea_size &&
1028             fix_problem(ctx, PR_1_CLEAR_EXTENT_FOR_INLINE_DATA, pctx)) {
1029                 inode->i_flags &= ~EXT4_EXTENTS_FL;
1030                 dirty = 1;
1031                 goto out;
1032         }
1033
1034         /*
1035          * Too big for inline data, but no evidence of extent tree -
1036          * maybe it's a block map file?  If the mappings all look valid?
1037          */
1038         if (could_be_block_map(fs, inode) &&
1039             fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_FLAGS, pctx)) {
1040 #ifdef WORDS_BIGENDIAN
1041                 int i;
1042
1043                 for (i = 0; i < EXT2_N_BLOCKS; i++)
1044                         inode->i_block[i] = ext2fs_swab32(inode->i_block[i]);
1045 #endif
1046
1047                 inode->i_flags &= ~(EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL);
1048                 dirty = 1;
1049                 goto out;
1050         }
1051
1052         /* Oh well, just clear the busted inode. */
1053         if (fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_INODE, pctx)) {
1054                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1055                 return -1;
1056         }
1057
1058 out:
1059         if (dirty)
1060                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1061
1062         return 0;
1063 }
1064
1065 static void pass1_readahead(e2fsck_t ctx, dgrp_t *group, ext2_ino_t *next_ino)
1066 {
1067         ext2_ino_t inodes_in_group = 0, inodes_per_block, inodes_per_buffer;
1068         dgrp_t start = *group, grp;
1069         blk64_t blocks_to_read = 0;
1070         errcode_t err = EXT2_ET_INVALID_ARGUMENT;
1071
1072         if (ctx->readahead_kb == 0)
1073                 goto out;
1074
1075         /* Keep iterating groups until we have enough to readahead */
1076         inodes_per_block = EXT2_INODES_PER_BLOCK(ctx->fs->super);
1077         for (grp = start; grp < ctx->fs->group_desc_count; grp++) {
1078                 if (ext2fs_bg_flags_test(ctx->fs, grp, EXT2_BG_INODE_UNINIT))
1079                         continue;
1080                 inodes_in_group = ctx->fs->super->s_inodes_per_group -
1081                                         ext2fs_bg_itable_unused(ctx->fs, grp);
1082                 blocks_to_read += (inodes_in_group + inodes_per_block - 1) /
1083                                         inodes_per_block;
1084                 if (blocks_to_read * ctx->fs->blocksize >
1085                     ctx->readahead_kb * 1024)
1086                         break;
1087         }
1088
1089         err = e2fsck_readahead(ctx->fs, E2FSCK_READA_ITABLE, start,
1090                                grp - start + 1);
1091         if (err == EAGAIN) {
1092                 ctx->readahead_kb /= 2;
1093                 err = 0;
1094         }
1095
1096 out:
1097         if (err) {
1098                 /* Error; disable itable readahead */
1099                 *group = ctx->fs->group_desc_count;
1100                 *next_ino = ctx->fs->super->s_inodes_count;
1101         } else {
1102                 /*
1103                  * Don't do more readahead until we've reached the first inode
1104                  * of the last inode scan buffer block for the last group.
1105                  */
1106                 *group = grp + 1;
1107                 inodes_per_buffer = (ctx->inode_buffer_blocks ?
1108                                      ctx->inode_buffer_blocks :
1109                                      EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS) *
1110                                     ctx->fs->blocksize /
1111                                     EXT2_INODE_SIZE(ctx->fs->super);
1112                 inodes_in_group--;
1113                 *next_ino = inodes_in_group -
1114                             (inodes_in_group % inodes_per_buffer) + 1 +
1115                             (grp * ctx->fs->super->s_inodes_per_group);
1116         }
1117 }
1118
1119 /*
1120  * Check if the passed ino is one of the used superblock quota inodes.
1121  *
1122  * Before the quota inodes were journaled, older superblock quota inodes
1123  * were just regular files in the filesystem and not reserved inodes.  This
1124  * checks if the passed ino is one of the s_*_quota_inum superblock fields,
1125  * which may not always be the same as the EXT4_*_QUOTA_INO fields.
1126  */
1127 static int quota_inum_is_super(struct ext2_super_block *sb, ext2_ino_t ino)
1128 {
1129         enum quota_type qtype;
1130
1131         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1132                 if (*quota_sb_inump(sb, qtype) == ino)
1133                         return 1;
1134
1135         return 0;
1136 }
1137
1138 /*
1139  * Check if the passed ino is one of the reserved quota inodes.
1140  * This checks if the inode number is one of the reserved EXT4_*_QUOTA_INO
1141  * inodes.  These inodes may or may not be in use by the quota feature.
1142  */
1143 static int quota_inum_is_reserved(ext2_filsys fs, ext2_ino_t ino)
1144 {
1145         enum quota_type qtype;
1146
1147         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1148                 if (quota_type2inum(qtype, fs->super) == ino)
1149                         return 1;
1150
1151         return 0;
1152 }
1153
1154 static int e2fsck_should_abort(e2fsck_t ctx)
1155 {
1156         e2fsck_t global_ctx;
1157
1158         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1159                 return 1;
1160
1161         if (ctx->global_ctx) {
1162                 global_ctx = ctx->global_ctx;
1163                 if (global_ctx->flags & E2F_FLAG_SIGNAL_MASK)
1164                         return 1;
1165         }
1166         return 0;
1167 }
1168
1169 void e2fsck_pass1_run(e2fsck_t ctx)
1170 {
1171         int     i;
1172         ext2_filsys fs = ctx->fs;
1173         ext2_ino_t      ino = 0;
1174         struct ext2_inode *inode = NULL;
1175         ext2_inode_scan scan = NULL;
1176         char            *block_buf = NULL;
1177 #ifdef RESOURCE_TRACK
1178         struct resource_track   rtrack;
1179 #endif
1180         unsigned char   frag, fsize;
1181         struct          problem_context pctx;
1182         struct          scan_callback_struct scan_struct;
1183         struct ext2_super_block *sb = ctx->fs->super;
1184         const char      *old_op;
1185         const char      *eop_next_inode = _("getting next inode from scan");
1186         int             imagic_fs, extent_fs, inlinedata_fs, casefold_fs;
1187         int             low_dtime_check = 1;
1188         unsigned int    inode_size = EXT2_INODE_SIZE(fs->super);
1189         unsigned int    bufsize;
1190         int             failed_csum = 0;
1191         ext2_ino_t      ino_threshold = 0;
1192         dgrp_t          ra_group = 0;
1193         struct ea_quota ea_ibody_quota;
1194         struct process_inode_block *inodes_to_process;
1195         int             process_inode_count;
1196
1197         init_resource_track(&rtrack, ctx->fs->io);
1198         clear_problem_context(&pctx);
1199
1200         /* If we can do readahead, figure out how many groups to pull in. */
1201         if (!e2fsck_can_readahead(ctx->fs))
1202                 ctx->readahead_kb = 0;
1203         else if (ctx->readahead_kb == ~0ULL)
1204                 ctx->readahead_kb = e2fsck_guess_readahead(ctx->fs);
1205         pass1_readahead(ctx, &ra_group, &ino_threshold);
1206
1207         if (!(ctx->options & E2F_OPT_PREEN))
1208                 fix_problem(ctx, PR_1_PASS_HEADER, &pctx);
1209
1210         if (ext2fs_has_feature_dir_index(fs->super) &&
1211             !(ctx->options & E2F_OPT_NO)) {
1212                 if (ext2fs_u32_list_create(&ctx->dirs_to_hash, 50))
1213                         ctx->dirs_to_hash = 0;
1214         }
1215
1216 #ifdef MTRACE
1217         mtrace_print("Pass 1");
1218 #endif
1219
1220         imagic_fs = ext2fs_has_feature_imagic_inodes(sb);
1221         extent_fs = ext2fs_has_feature_extents(sb);
1222         inlinedata_fs = ext2fs_has_feature_inline_data(sb);
1223         casefold_fs = ext2fs_has_feature_casefold(sb);
1224
1225         /*
1226          * Allocate bitmaps structures
1227          */
1228         pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("in-use inode map"),
1229                                                     EXT2FS_BMAP64_RBTREE,
1230                                                     "inode_used_map",
1231                                                     &ctx->inode_used_map);
1232         if (pctx.errcode) {
1233                 pctx.num = 1;
1234                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1235                 ctx->flags |= E2F_FLAG_ABORT;
1236                 return;
1237         }
1238         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1239                         _("directory inode map"),
1240                         EXT2FS_BMAP64_AUTODIR,
1241                         "inode_dir_map", &ctx->inode_dir_map);
1242         if (pctx.errcode) {
1243                 pctx.num = 2;
1244                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1245                 ctx->flags |= E2F_FLAG_ABORT;
1246                 return;
1247         }
1248         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1249                         _("regular file inode map"), EXT2FS_BMAP64_RBTREE,
1250                         "inode_reg_map", &ctx->inode_reg_map);
1251         if (pctx.errcode) {
1252                 pctx.num = 6;
1253                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1254                 ctx->flags |= E2F_FLAG_ABORT;
1255                 return;
1256         }
1257         pctx.errcode = e2fsck_allocate_subcluster_bitmap(fs,
1258                         _("in-use block map"), EXT2FS_BMAP64_RBTREE,
1259                         "block_found_map", &ctx->block_found_map);
1260         if (pctx.errcode) {
1261                 pctx.num = 1;
1262                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1263                 ctx->flags |= E2F_FLAG_ABORT;
1264                 return;
1265         }
1266         pctx.errcode = e2fsck_allocate_block_bitmap(fs,
1267                         _("metadata block map"), EXT2FS_BMAP64_RBTREE,
1268                         "block_metadata_map", &ctx->block_metadata_map);
1269         if (pctx.errcode) {
1270                 pctx.num = 1;
1271                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1272                 ctx->flags |= E2F_FLAG_ABORT;
1273                 return;
1274         }
1275         if (casefold_fs) {
1276                 pctx.errcode =
1277                         e2fsck_allocate_inode_bitmap(fs,
1278                                                      _("inode casefold map"),
1279                                                      EXT2FS_BMAP64_RBTREE,
1280                                                      "inode_casefold_map",
1281                                                      &ctx->inode_casefold_map);
1282                 if (pctx.errcode) {
1283                         pctx.num = 1;
1284                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1285                         ctx->flags |= E2F_FLAG_ABORT;
1286                         return;
1287                 }
1288         }
1289         pctx.errcode = e2fsck_setup_icount(ctx, "inode_link_info", 0, NULL,
1290                                            &ctx->inode_link_info);
1291         if (pctx.errcode) {
1292                 fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
1293                 ctx->flags |= E2F_FLAG_ABORT;
1294                 return;
1295         }
1296         bufsize = inode_size;
1297         if (bufsize < sizeof(struct ext2_inode_large))
1298                 bufsize = sizeof(struct ext2_inode_large);
1299         inode = (struct ext2_inode *)
1300                 e2fsck_allocate_memory(ctx, bufsize, "scratch inode");
1301
1302         inodes_to_process = (struct process_inode_block *)
1303                 e2fsck_allocate_memory(ctx,
1304                                        (ctx->process_inode_size *
1305                                         sizeof(struct process_inode_block)),
1306                                        "array of inodes to process");
1307         process_inode_count = 0;
1308
1309         pctx.errcode = ext2fs_init_dblist(fs, 0);
1310         if (pctx.errcode) {
1311                 fix_problem(ctx, PR_1_ALLOCATE_DBCOUNT, &pctx);
1312                 ctx->flags |= E2F_FLAG_ABORT;
1313                 goto endit;
1314         }
1315
1316         /*
1317          * If the last orphan field is set, clear it, since the pass1
1318          * processing will automatically find and clear the orphans.
1319          * In the future, we may want to try using the last_orphan
1320          * linked list ourselves, but for now, we clear it so that the
1321          * ext3 mount code won't get confused.
1322          */
1323         if (!(ctx->options & E2F_OPT_READONLY)) {
1324                 if (fs->super->s_last_orphan) {
1325                         fs->super->s_last_orphan = 0;
1326                         ext2fs_mark_super_dirty(fs);
1327                 }
1328         }
1329
1330         mark_table_blocks(ctx);
1331         pctx.errcode = ext2fs_convert_subcluster_bitmap(fs,
1332                                                 &ctx->block_found_map);
1333         if (pctx.errcode) {
1334                 fix_problem(ctx, PR_1_CONVERT_SUBCLUSTER, &pctx);
1335                 ctx->flags |= E2F_FLAG_ABORT;
1336                 goto endit;
1337         }
1338         block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3,
1339                                                     "block interate buffer");
1340         if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
1341                 e2fsck_use_inode_shortcuts(ctx, 1);
1342         e2fsck_intercept_block_allocations(ctx);
1343         old_op = ehandler_operation(_("opening inode scan"));
1344         pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks,
1345                                               &scan);
1346         ehandler_operation(old_op);
1347         if (pctx.errcode) {
1348                 fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1349                 ctx->flags |= E2F_FLAG_ABORT;
1350                 goto endit;
1351         }
1352         ext2fs_inode_scan_flags(scan, EXT2_SF_SKIP_MISSING_ITABLE |
1353                                       EXT2_SF_WARN_GARBAGE_INODES, 0);
1354         ctx->stashed_inode = inode;
1355         scan_struct.ctx = ctx;
1356         scan_struct.block_buf = block_buf;
1357         scan_struct.inodes_to_process = inodes_to_process;
1358         scan_struct.process_inode_count = &process_inode_count;
1359         ext2fs_set_inode_callback(scan, scan_callback, &scan_struct);
1360         if (ctx->progress && ((ctx->progress)(ctx, 1, 0,
1361                                               ctx->fs->group_desc_count)))
1362                 goto endit;
1363         if ((fs->super->s_wtime &&
1364              fs->super->s_wtime < fs->super->s_inodes_count) ||
1365             (fs->super->s_mtime &&
1366              fs->super->s_mtime < fs->super->s_inodes_count) ||
1367             (fs->super->s_mkfs_time &&
1368              fs->super->s_mkfs_time < fs->super->s_inodes_count))
1369                 low_dtime_check = 0;
1370
1371         if (ext2fs_has_feature_mmp(fs->super) &&
1372             fs->super->s_mmp_block > fs->super->s_first_data_block &&
1373             fs->super->s_mmp_block < ext2fs_blocks_count(fs->super))
1374                 ext2fs_mark_block_bitmap2(ctx->block_found_map,
1375                                           fs->super->s_mmp_block);
1376
1377         /* Set up ctx->lost_and_found if possible */
1378         (void) e2fsck_get_lost_and_found(ctx, 0);
1379
1380 #ifdef HAVE_PTHREAD
1381         if (ctx->global_ctx) {
1382                 if (ctx->options & E2F_OPT_DEBUG &&
1383                     ctx->options & E2F_OPT_MULTITHREAD)
1384                         fprintf(stderr, "thread %d jumping to group %d\n",
1385                                         ctx->thread_info.et_thread_index,
1386                                         ctx->thread_info.et_group_start);
1387                 pctx.errcode = ext2fs_inode_scan_goto_blockgroup(scan,
1388                                         ctx->thread_info.et_group_start);
1389                 if (pctx.errcode) {
1390                         fix_problem(ctx, PR_1_PASS_HEADER, &pctx);
1391                         ctx->flags |= E2F_FLAG_ABORT;
1392                         goto endit;
1393                 }
1394         }
1395 #endif
1396
1397         while (1) {
1398                 if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
1399                         if (e2fsck_mmp_update(fs))
1400                                 fatal_error(ctx, 0);
1401                 }
1402                 old_op = ehandler_operation(eop_next_inode);
1403                 pctx.errcode = ext2fs_get_next_inode_full(scan, &ino,
1404                                                           inode, inode_size);
1405                 if (ino > ino_threshold)
1406                         pass1_readahead(ctx, &ra_group, &ino_threshold);
1407                 ehandler_operation(old_op);
1408                 if (e2fsck_should_abort(ctx))
1409                         goto endit;
1410                 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) {
1411                         /*
1412                          * If badblocks says badblocks is bad, offer to clear
1413                          * the list, update the in-core bb list, and restart
1414                          * the inode scan.
1415                          */
1416                         if (ino == EXT2_BAD_INO &&
1417                             fix_problem(ctx, PR_1_BADBLOCKS_IN_BADBLOCKS,
1418                                         &pctx)) {
1419                                 errcode_t err;
1420
1421                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1422                                 ext2fs_badblocks_list_free(ctx->fs->badblocks);
1423                                 ctx->fs->badblocks = NULL;
1424                                 err = ext2fs_read_bb_inode(ctx->fs,
1425                                                         &ctx->fs->badblocks);
1426                                 if (err) {
1427                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1428                                                     &pctx);
1429                                         ctx->flags |= E2F_FLAG_ABORT;
1430                                 } else
1431                                         ctx->flags |= E2F_FLAG_RESTART;
1432                                 goto endit;
1433                         }
1434                         if (!ctx->inode_bb_map)
1435                                 alloc_bb_map(ctx);
1436                         ext2fs_mark_inode_bitmap2(ctx->inode_bb_map, ino);
1437                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1438                         continue;
1439                 }
1440                 if (pctx.errcode == EXT2_ET_SCAN_FINISHED)
1441                         break;
1442                 if (pctx.errcode &&
1443                     pctx.errcode != EXT2_ET_INODE_CSUM_INVALID &&
1444                     pctx.errcode != EXT2_ET_INODE_IS_GARBAGE) {
1445                         fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1446                         ctx->flags |= E2F_FLAG_ABORT;
1447                         goto endit;
1448                 }
1449                 if (!ino)
1450                         break;
1451 #ifdef HAVE_PTHREAD
1452                 if (ctx->global_ctx)
1453                         ctx->thread_info.et_inode_number++;
1454 #endif
1455                 pctx.ino = ino;
1456                 pctx.inode = inode;
1457                 ctx->stashed_ino = ino;
1458
1459                 /* Clear trashed inode? */
1460                 if (pctx.errcode == EXT2_ET_INODE_IS_GARBAGE &&
1461                     inode->i_links_count > 0 &&
1462                     fix_problem(ctx, PR_1_INODE_IS_GARBAGE, &pctx)) {
1463                         pctx.errcode = 0;
1464                         e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1465                 }
1466                 failed_csum = pctx.errcode != 0;
1467
1468                 /*
1469                  * Check for inodes who might have been part of the
1470                  * orphaned list linked list.  They should have gotten
1471                  * dealt with by now, unless the list had somehow been
1472                  * corrupted.
1473                  *
1474                  * FIXME: In the future, inodes which are still in use
1475                  * (and which are therefore) pending truncation should
1476                  * be handled specially.  Right now we just clear the
1477                  * dtime field, and the normal e2fsck handling of
1478                  * inodes where i_size and the inode blocks are
1479                  * inconsistent is to fix i_size, instead of releasing
1480                  * the extra blocks.  This won't catch the inodes that
1481                  * was at the end of the orphan list, but it's better
1482                  * than nothing.  The right answer is that there
1483                  * shouldn't be any bugs in the orphan list handling.  :-)
1484                  */
1485                 if (inode->i_dtime && low_dtime_check &&
1486                     inode->i_dtime < ctx->fs->super->s_inodes_count) {
1487                         if (fix_problem(ctx, PR_1_LOW_DTIME, &pctx)) {
1488                                 inode->i_dtime = inode->i_links_count ?
1489                                         0 : ctx->now;
1490                                 e2fsck_write_inode(ctx, ino, inode,
1491                                                    "pass1");
1492                                 failed_csum = 0;
1493                         }
1494                 }
1495
1496                 if (inode->i_links_count) {
1497                         pctx.errcode = ext2fs_icount_store(ctx->inode_link_info,
1498                                            ino, inode->i_links_count);
1499                         if (pctx.errcode) {
1500                                 pctx.num = inode->i_links_count;
1501                                 fix_problem(ctx, PR_1_ICOUNT_STORE, &pctx);
1502                                 ctx->flags |= E2F_FLAG_ABORT;
1503                                 goto endit;
1504                         }
1505                 } else if ((ino >= EXT2_FIRST_INODE(fs->super)) &&
1506                            !quota_inum_is_reserved(fs, ino)) {
1507                         if (!inode->i_dtime && inode->i_mode) {
1508                                 if (fix_problem(ctx,
1509                                             PR_1_ZERO_DTIME, &pctx)) {
1510                                         inode->i_dtime = ctx->now;
1511                                         e2fsck_write_inode(ctx, ino, inode,
1512                                                            "pass1");
1513                                         failed_csum = 0;
1514                                 }
1515                         }
1516                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1517                         continue;
1518                 }
1519
1520                 if ((inode->i_flags & EXT4_CASEFOLD_FL) &&
1521                     ((!LINUX_S_ISDIR(inode->i_mode) &&
1522                       fix_problem(ctx, PR_1_CASEFOLD_NONDIR, &pctx)) ||
1523                      (!casefold_fs &&
1524                       fix_problem(ctx, PR_1_CASEFOLD_FEATURE, &pctx)))) {
1525                         inode->i_flags &= ~EXT4_CASEFOLD_FL;
1526                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1527                 }
1528
1529                 /* Conflicting inlinedata/extents inode flags? */
1530                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
1531                     (inode->i_flags & EXT4_EXTENTS_FL)) {
1532                         int res = fix_inline_data_extents_file(ctx, ino, inode,
1533                                                                inode_size,
1534                                                                &pctx);
1535                         if (res < 0) {
1536                                 /* skip FINISH_INODE_LOOP */
1537                                 continue;
1538                         }
1539                 }
1540
1541                 /* Test for incorrect inline_data flags settings. */
1542                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && !inlinedata_fs &&
1543                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1544                         size_t size = 0;
1545
1546                         pctx.errcode = get_inline_data_ea_size(fs, ino, &size);
1547                         if (!pctx.errcode &&
1548                             fix_problem(ctx, PR_1_INLINE_DATA_FEATURE, &pctx)) {
1549                                 ext2fs_set_feature_inline_data(sb);
1550                                 ext2fs_mark_super_dirty(fs);
1551                                 inlinedata_fs = 1;
1552                         } else if (fix_problem(ctx, PR_1_INLINE_DATA_SET, &pctx)) {
1553                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1554                                 /* skip FINISH_INODE_LOOP */
1555                                 continue;
1556                         }
1557                 }
1558
1559                 /* Test for inline data flag but no attr */
1560                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && inlinedata_fs &&
1561                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1562                         size_t size = 0;
1563                         errcode_t err;
1564                         int flags;
1565
1566                         flags = fs->flags;
1567                         if (failed_csum)
1568                                 fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1569                         err = get_inline_data_ea_size(fs, ino, &size);
1570                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1571                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1572
1573                         switch (err) {
1574                         case 0:
1575                                 /* Everything is awesome... */
1576                                 break;
1577                         case EXT2_ET_BAD_EA_BLOCK_NUM:
1578                         case EXT2_ET_BAD_EA_HASH:
1579                         case EXT2_ET_BAD_EA_HEADER:
1580                         case EXT2_ET_EA_BAD_NAME_LEN:
1581                         case EXT2_ET_EA_BAD_VALUE_SIZE:
1582                         case EXT2_ET_EA_KEY_NOT_FOUND:
1583                         case EXT2_ET_EA_NO_SPACE:
1584                         case EXT2_ET_MISSING_EA_FEATURE:
1585                         case EXT2_ET_INLINE_DATA_CANT_ITERATE:
1586                         case EXT2_ET_INLINE_DATA_NO_BLOCK:
1587                         case EXT2_ET_INLINE_DATA_NO_SPACE:
1588                         case EXT2_ET_NO_INLINE_DATA:
1589                         case EXT2_ET_EXT_ATTR_CSUM_INVALID:
1590                         case EXT2_ET_EA_BAD_VALUE_OFFSET:
1591                         case EXT2_ET_EA_INODE_CORRUPTED:
1592                                 /* broken EA or no system.data EA; truncate */
1593                                 if (fix_problem(ctx, PR_1_INLINE_DATA_NO_ATTR,
1594                                                 &pctx)) {
1595                                         err = ext2fs_inode_size_set(fs, inode, 0);
1596                                         if (err) {
1597                                                 pctx.errcode = err;
1598                                                 ctx->flags |= E2F_FLAG_ABORT;
1599                                                 goto endit;
1600                                         }
1601                                         inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1602                                         memset(&inode->i_block, 0,
1603                                                sizeof(inode->i_block));
1604                                         e2fsck_write_inode(ctx, ino, inode,
1605                                                            "pass1");
1606                                         failed_csum = 0;
1607                                 }
1608                                 break;
1609                         default:
1610                                 /* Some other kind of non-xattr error? */
1611                                 pctx.errcode = err;
1612                                 ctx->flags |= E2F_FLAG_ABORT;
1613                                 goto endit;
1614                         }
1615                 }
1616
1617                 /*
1618                  * Test for incorrect extent flag settings.
1619                  *
1620                  * On big-endian machines we must be careful:
1621                  * When the inode is read, the i_block array is not swapped
1622                  * if the extent flag is set.  Therefore if we are testing
1623                  * for or fixing a wrongly-set flag, we must potentially
1624                  * (un)swap before testing, or after fixing.
1625                  */
1626
1627                 /*
1628                  * In this case the extents flag was set when read, so
1629                  * extent_header_verify is ok.  If the inode is cleared,
1630                  * no need to swap... so no extra swapping here.
1631                  */
1632                 if ((inode->i_flags & EXT4_EXTENTS_FL) && !extent_fs &&
1633                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1634                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO))) {
1635                         if ((ext2fs_extent_header_verify(inode->i_block,
1636                                                  sizeof(inode->i_block)) == 0) &&
1637                             fix_problem(ctx, PR_1_EXTENT_FEATURE, &pctx)) {
1638                                 ext2fs_set_feature_extents(sb);
1639                                 ext2fs_mark_super_dirty(fs);
1640                                 extent_fs = 1;
1641                         } else if (fix_problem(ctx, PR_1_EXTENTS_SET, &pctx)) {
1642                         clear_inode:
1643                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1644                                 if (ino == EXT2_BAD_INO)
1645                                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map,
1646                                                                  ino);
1647                                 /* skip FINISH_INODE_LOOP */
1648                                 continue;
1649                         }
1650                 }
1651
1652                 /*
1653                  * For big-endian machines:
1654                  * If the inode didn't have the extents flag set when it
1655                  * was read, then the i_blocks array was swapped.  To test
1656                  * as an extents header, we must swap it back first.
1657                  * IF we then set the extents flag, the entire i_block
1658                  * array must be un/re-swapped to make it proper extents data.
1659                  */
1660                 if (extent_fs && !(inode->i_flags & EXT4_EXTENTS_FL) &&
1661                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1662                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO)) &&
1663                     (LINUX_S_ISREG(inode->i_mode) ||
1664                      LINUX_S_ISDIR(inode->i_mode))) {
1665                         void *ehp;
1666 #ifdef WORDS_BIGENDIAN
1667                         __u32 tmp_block[EXT2_N_BLOCKS];
1668
1669                         for (i = 0; i < EXT2_N_BLOCKS; i++)
1670                                 tmp_block[i] = ext2fs_swab32(inode->i_block[i]);
1671                         ehp = tmp_block;
1672 #else
1673                         ehp = inode->i_block;
1674 #endif
1675                         if ((ext2fs_extent_header_verify(ehp,
1676                                          sizeof(inode->i_block)) == 0) &&
1677                             (fix_problem(ctx, PR_1_UNSET_EXTENT_FL, &pctx))) {
1678                                 inode->i_flags |= EXT4_EXTENTS_FL;
1679 #ifdef WORDS_BIGENDIAN
1680                                 memcpy(inode->i_block, tmp_block,
1681                                        sizeof(inode->i_block));
1682 #endif
1683                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1684                                 failed_csum = 0;
1685                         }
1686                 }
1687
1688                 if (ino == EXT2_BAD_INO) {
1689                         struct process_block_struct pb;
1690
1691                         if ((failed_csum || inode->i_mode || inode->i_uid ||
1692                              inode->i_gid || inode->i_links_count ||
1693                              (inode->i_flags & EXT4_INLINE_DATA_FL) ||
1694                              inode->i_file_acl) &&
1695                             fix_problem(ctx, PR_1_INVALID_BAD_INODE, &pctx)) {
1696                                 memset(inode, 0, sizeof(struct ext2_inode));
1697                                 e2fsck_write_inode(ctx, ino, inode,
1698                                                    "clear bad inode");
1699                                 failed_csum = 0;
1700                         }
1701
1702                         pctx.errcode = ext2fs_copy_bitmap(ctx->block_found_map,
1703                                                           &pb.fs_meta_blocks);
1704                         if (pctx.errcode) {
1705                                 pctx.num = 4;
1706                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1707                                 ctx->flags |= E2F_FLAG_ABORT;
1708                                 goto endit;
1709                         }
1710                         pb.ino = EXT2_BAD_INO;
1711                         pb.num_blocks = pb.last_block = 0;
1712                         pb.last_db_block = -1;
1713                         pb.num_illegal_blocks = 0;
1714                         pb.suppress = 0; pb.clear = 0; pb.is_dir = 0;
1715                         pb.is_reg = 0; pb.fragmented = 0; pb.bbcheck = 0;
1716                         pb.inode = inode;
1717                         pb.pctx = &pctx;
1718                         pb.ctx = ctx;
1719                         pctx.errcode = ext2fs_block_iterate3(fs, ino, 0,
1720                                      block_buf, process_bad_block, &pb);
1721                         ext2fs_free_block_bitmap(pb.fs_meta_blocks);
1722                         if (pctx.errcode) {
1723                                 fix_problem(ctx, PR_1_BLOCK_ITERATE, &pctx);
1724                                 ctx->flags |= E2F_FLAG_ABORT;
1725                                 goto endit;
1726                         }
1727                         if (pb.bbcheck)
1728                                 if (!fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK_PROMPT, &pctx)) {
1729                                 ctx->flags |= E2F_FLAG_ABORT;
1730                                 goto endit;
1731                         }
1732                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1733                         clear_problem_context(&pctx);
1734                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1735                         continue;
1736                 } else if (ino == EXT2_ROOT_INO) {
1737                         /*
1738                          * Make sure the root inode is a directory; if
1739                          * not, offer to clear it.  It will be
1740                          * regenerated in pass #3.
1741                          */
1742                         if (!LINUX_S_ISDIR(inode->i_mode)) {
1743                                 if (fix_problem(ctx, PR_1_ROOT_NO_DIR, &pctx))
1744                                         goto clear_inode;
1745                         }
1746                         /*
1747                          * If dtime is set, offer to clear it.  mke2fs
1748                          * version 0.2b created filesystems with the
1749                          * dtime field set for the root and lost+found
1750                          * directories.  We won't worry about
1751                          * /lost+found, since that can be regenerated
1752                          * easily.  But we will fix the root directory
1753                          * as a special case.
1754                          */
1755                         if (inode->i_dtime && inode->i_links_count) {
1756                                 if (fix_problem(ctx, PR_1_ROOT_DTIME, &pctx)) {
1757                                         inode->i_dtime = 0;
1758                                         e2fsck_write_inode(ctx, ino, inode,
1759                                                            "pass1");
1760                                         failed_csum = 0;
1761                                 }
1762                         }
1763                 } else if (ino == EXT2_JOURNAL_INO) {
1764                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1765                         if (fs->super->s_journal_inum == EXT2_JOURNAL_INO) {
1766                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1767                                     fix_problem(ctx, PR_1_JOURNAL_BAD_MODE,
1768                                                 &pctx)) {
1769                                         inode->i_mode = LINUX_S_IFREG;
1770                                         e2fsck_write_inode(ctx, ino, inode,
1771                                                            "pass1");
1772                                         failed_csum = 0;
1773                                 }
1774                                 check_blocks(ctx, &pctx, block_buf, NULL);
1775                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1776                                 continue;
1777                         }
1778                         if ((inode->i_links_count ||
1779                              inode->i_blocks || inode->i_block[0]) &&
1780                             fix_problem(ctx, PR_1_JOURNAL_INODE_NOT_CLEAR,
1781                                         &pctx)) {
1782                                 memset(inode, 0, inode_size);
1783                                 ext2fs_icount_store(ctx->inode_link_info,
1784                                                     ino, 0);
1785                                 e2fsck_write_inode_full(ctx, ino, inode,
1786                                                         inode_size, "pass1");
1787                                 failed_csum = 0;
1788                         }
1789                 } else if (quota_inum_is_reserved(fs, ino)) {
1790                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1791                         if (ext2fs_has_feature_quota(fs->super) &&
1792                             quota_inum_is_super(fs->super, ino)) {
1793                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1794                                     fix_problem(ctx, PR_1_QUOTA_BAD_MODE,
1795                                                         &pctx)) {
1796                                         inode->i_mode = LINUX_S_IFREG;
1797                                         e2fsck_write_inode(ctx, ino, inode,
1798                                                         "pass1");
1799                                         failed_csum = 0;
1800                                 }
1801                                 check_blocks(ctx, &pctx, block_buf, NULL);
1802                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1803                                 continue;
1804                         }
1805                         if ((inode->i_links_count ||
1806                              inode->i_blocks || inode->i_block[0]) &&
1807                             fix_problem(ctx, PR_1_QUOTA_INODE_NOT_CLEAR,
1808                                         &pctx)) {
1809                                 memset(inode, 0, inode_size);
1810                                 ext2fs_icount_store(ctx->inode_link_info,
1811                                                     ino, 0);
1812                                 e2fsck_write_inode_full(ctx, ino, inode,
1813                                                         inode_size, "pass1");
1814                                 failed_csum = 0;
1815                         }
1816                 } else if (ino < EXT2_FIRST_INODE(fs->super)) {
1817                         problem_t problem = 0;
1818
1819                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1820                         if (ino == EXT2_BOOT_LOADER_INO) {
1821                                 if (LINUX_S_ISDIR(inode->i_mode))
1822                                         problem = PR_1_RESERVED_BAD_MODE;
1823                         } else if (ino == EXT2_RESIZE_INO) {
1824                                 if (inode->i_mode &&
1825                                     !LINUX_S_ISREG(inode->i_mode))
1826                                         problem = PR_1_RESERVED_BAD_MODE;
1827                         } else {
1828                                 if (inode->i_mode != 0)
1829                                         problem = PR_1_RESERVED_BAD_MODE;
1830                         }
1831                         if (problem) {
1832                                 if (fix_problem(ctx, problem, &pctx)) {
1833                                         inode->i_mode = 0;
1834                                         e2fsck_write_inode(ctx, ino, inode,
1835                                                            "pass1");
1836                                         failed_csum = 0;
1837                                 }
1838                         }
1839                         check_blocks(ctx, &pctx, block_buf, NULL);
1840                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1841                         continue;
1842                 }
1843
1844                 if (!inode->i_links_count) {
1845                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1846                         continue;
1847                 }
1848                 /*
1849                  * n.b.  0.3c ext2fs code didn't clear i_links_count for
1850                  * deleted files.  Oops.
1851                  *
1852                  * Since all new ext2 implementations get this right,
1853                  * we now assume that the case of non-zero
1854                  * i_links_count and non-zero dtime means that we
1855                  * should keep the file, not delete it.
1856                  *
1857                  */
1858                 if (inode->i_dtime) {
1859                         if (fix_problem(ctx, PR_1_SET_DTIME, &pctx)) {
1860                                 inode->i_dtime = 0;
1861                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1862                                 failed_csum = 0;
1863                         }
1864                 }
1865
1866                 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1867                 switch (fs->super->s_creator_os) {
1868                     case EXT2_OS_HURD:
1869                         frag = inode->osd2.hurd2.h_i_frag;
1870                         fsize = inode->osd2.hurd2.h_i_fsize;
1871                         break;
1872                     default:
1873                         frag = fsize = 0;
1874                 }
1875
1876                 if (inode->i_faddr || frag || fsize ||
1877                     (!ext2fs_has_feature_largedir(fs->super) &&
1878                     (LINUX_S_ISDIR(inode->i_mode) && inode->i_size_high)))
1879                         mark_inode_bad(ctx, ino);
1880                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1881                     !ext2fs_has_feature_64bit(fs->super) &&
1882                     inode->osd2.linux2.l_i_file_acl_high != 0)
1883                         mark_inode_bad(ctx, ino);
1884                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1885                     !ext2fs_has_feature_huge_file(fs->super) &&
1886                     (inode->osd2.linux2.l_i_blocks_hi != 0))
1887                         mark_inode_bad(ctx, ino);
1888                 if (inode->i_flags & EXT2_IMAGIC_FL) {
1889                         if (imagic_fs) {
1890                                 if (!ctx->inode_imagic_map)
1891                                         alloc_imagic_map(ctx);
1892                                 ext2fs_mark_inode_bitmap2(ctx->inode_imagic_map,
1893                                                          ino);
1894                         } else {
1895                                 if (fix_problem(ctx, PR_1_SET_IMAGIC, &pctx)) {
1896                                         inode->i_flags &= ~EXT2_IMAGIC_FL;
1897                                         e2fsck_write_inode(ctx, ino,
1898                                                            inode, "pass1");
1899                                         failed_csum = 0;
1900                                 }
1901                         }
1902                 }
1903
1904                 check_inode_extra_space(ctx, &pctx, &ea_ibody_quota);
1905                 check_is_really_dir(ctx, &pctx, block_buf);
1906
1907                 /*
1908                  * ext2fs_inode_has_valid_blocks2 does not actually look
1909                  * at i_block[] values, so not endian-sensitive here.
1910                  */
1911                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL) &&
1912                     LINUX_S_ISLNK(inode->i_mode) &&
1913                     !ext2fs_inode_has_valid_blocks2(fs, inode) &&
1914                     fix_problem(ctx, PR_1_FAST_SYMLINK_EXTENT_FL, &pctx)) {
1915                         inode->i_flags &= ~EXT4_EXTENTS_FL;
1916                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1917                         failed_csum = 0;
1918                 }
1919
1920                 if ((inode->i_flags & EXT4_ENCRYPT_FL) &&
1921                     add_encrypted_file(ctx, &pctx) < 0)
1922                         goto clear_inode;
1923
1924                 if (casefold_fs && inode->i_flags & EXT4_CASEFOLD_FL)
1925                         ext2fs_mark_inode_bitmap2(ctx->inode_casefold_map, ino);
1926
1927                 if (LINUX_S_ISDIR(inode->i_mode)) {
1928                         ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
1929                         e2fsck_add_dir_info(ctx, ino, 0);
1930                         ctx->fs_directory_count++;
1931                         if (inode->i_flags & EXT4_CASEFOLD_FL)
1932                                 add_casefolded_dir(ctx, ino);
1933                 } else if (LINUX_S_ISREG (inode->i_mode)) {
1934                         ext2fs_mark_inode_bitmap2(ctx->inode_reg_map, ino);
1935                         ctx->fs_regular_count++;
1936                 } else if (LINUX_S_ISCHR (inode->i_mode) &&
1937                            e2fsck_pass1_check_device_inode(fs, inode)) {
1938                         check_extents_inlinedata(ctx, &pctx);
1939                         check_immutable(ctx, &pctx);
1940                         check_size(ctx, &pctx);
1941                         ctx->fs_chardev_count++;
1942                 } else if (LINUX_S_ISBLK (inode->i_mode) &&
1943                            e2fsck_pass1_check_device_inode(fs, inode)) {
1944                         check_extents_inlinedata(ctx, &pctx);
1945                         check_immutable(ctx, &pctx);
1946                         check_size(ctx, &pctx);
1947                         ctx->fs_blockdev_count++;
1948                 } else if (LINUX_S_ISLNK (inode->i_mode) &&
1949                            e2fsck_pass1_check_symlink(fs, ino, inode,
1950                                                       block_buf)) {
1951                         check_immutable(ctx, &pctx);
1952                         ctx->fs_symlinks_count++;
1953                         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
1954                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1955                                 continue;
1956                         } else if (ext2fs_is_fast_symlink(inode)) {
1957                                 ctx->fs_fast_symlinks_count++;
1958                                 check_blocks(ctx, &pctx, block_buf,
1959                                              &ea_ibody_quota);
1960                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1961                                 continue;
1962                         }
1963                 }
1964                 else if (LINUX_S_ISFIFO (inode->i_mode) &&
1965                          e2fsck_pass1_check_device_inode(fs, inode)) {
1966                         check_extents_inlinedata(ctx, &pctx);
1967                         check_immutable(ctx, &pctx);
1968                         check_size(ctx, &pctx);
1969                         ctx->fs_fifo_count++;
1970                 } else if ((LINUX_S_ISSOCK (inode->i_mode)) &&
1971                            e2fsck_pass1_check_device_inode(fs, inode)) {
1972                         check_extents_inlinedata(ctx, &pctx);
1973                         check_immutable(ctx, &pctx);
1974                         check_size(ctx, &pctx);
1975                         ctx->fs_sockets_count++;
1976                 } else
1977                         mark_inode_bad(ctx, ino);
1978                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1979                     !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
1980                         if (inode->i_block[EXT2_IND_BLOCK])
1981                                 ctx->fs_ind_count++;
1982                         if (inode->i_block[EXT2_DIND_BLOCK])
1983                                 ctx->fs_dind_count++;
1984                         if (inode->i_block[EXT2_TIND_BLOCK])
1985                                 ctx->fs_tind_count++;
1986                 }
1987                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1988                     !(inode->i_flags & EXT4_INLINE_DATA_FL) &&
1989                     (inode->i_block[EXT2_IND_BLOCK] ||
1990                      inode->i_block[EXT2_DIND_BLOCK] ||
1991                      inode->i_block[EXT2_TIND_BLOCK] ||
1992                      ext2fs_file_acl_block(fs, inode))) {
1993                         struct process_inode_block *itp;
1994
1995                         itp = &inodes_to_process[process_inode_count];
1996                         itp->ino = ino;
1997                         itp->ea_ibody_quota = ea_ibody_quota;
1998                         if (inode_size < sizeof(struct ext2_inode_large))
1999                                 memcpy(&itp->inode, inode, inode_size);
2000                         else
2001                                 memcpy(&itp->inode, inode, sizeof(itp->inode));
2002                         process_inode_count++;
2003                 } else
2004                         check_blocks(ctx, &pctx, block_buf, &ea_ibody_quota);
2005
2006                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
2007
2008                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2009                         goto endit;
2010
2011                 if (process_inode_count >= ctx->process_inode_size) {
2012                         process_inodes(ctx, block_buf, inodes_to_process,
2013                                        &process_inode_count);
2014
2015                         if (e2fsck_should_abort(ctx))
2016                                 goto endit;
2017                 }
2018         }
2019         process_inodes(ctx, block_buf, inodes_to_process,
2020                        &process_inode_count);
2021         ext2fs_close_inode_scan(scan);
2022         scan = NULL;
2023
2024         reserve_block_for_root_repair(ctx);
2025         reserve_block_for_lnf_repair(ctx);
2026
2027         /*
2028          * If any extended attribute blocks' reference counts need to
2029          * be adjusted, either up (ctx->refcount_extra), or down
2030          * (ctx->refcount), then fix them.
2031          */
2032         if (ctx->refcount) {
2033                 adjust_extattr_refcount(ctx, ctx->refcount, block_buf, -1);
2034                 ea_refcount_free(ctx->refcount);
2035                 ctx->refcount = 0;
2036         }
2037         if (ctx->refcount_extra) {
2038                 adjust_extattr_refcount(ctx, ctx->refcount_extra,
2039                                         block_buf, +1);
2040                 ea_refcount_free(ctx->refcount_extra);
2041                 ctx->refcount_extra = 0;
2042         }
2043
2044         if (ctx->ea_block_quota_blocks) {
2045                 ea_refcount_free(ctx->ea_block_quota_blocks);
2046                 ctx->ea_block_quota_blocks = 0;
2047         }
2048
2049         if (ctx->ea_block_quota_inodes) {
2050                 ea_refcount_free(ctx->ea_block_quota_inodes);
2051                 ctx->ea_block_quota_inodes = 0;
2052         }
2053
2054         if (ctx->invalid_bitmaps)
2055                 handle_fs_bad_blocks(ctx);
2056
2057         /* We don't need the block_ea_map any more */
2058         if (ctx->block_ea_map) {
2059                 ext2fs_free_block_bitmap(ctx->block_ea_map);
2060                 ctx->block_ea_map = 0;
2061         }
2062
2063         /* We don't need the encryption policy => ID map any more */
2064         destroy_encryption_policy_map(ctx);
2065
2066         if (ctx->flags & E2F_FLAG_RESIZE_INODE) {
2067                 clear_problem_context(&pctx);
2068                 pctx.errcode = ext2fs_create_resize_inode(fs);
2069                 if (pctx.errcode) {
2070                         if (!fix_problem(ctx, PR_1_RESIZE_INODE_CREATE,
2071                                          &pctx)) {
2072                                 ctx->flags |= E2F_FLAG_ABORT;
2073                                 goto endit;
2074                         }
2075                         pctx.errcode = 0;
2076                 }
2077                 if (!pctx.errcode) {
2078                         e2fsck_read_inode(ctx, EXT2_RESIZE_INO, inode,
2079                                           "recreate inode");
2080                         inode->i_mtime = ctx->now;
2081                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, inode,
2082                                            "recreate inode");
2083                 }
2084                 ctx->flags &= ~E2F_FLAG_RESIZE_INODE;
2085         }
2086
2087         if (ctx->flags & E2F_FLAG_RESTART) {
2088                 /*
2089                  * Only the master copy of the superblock and block
2090                  * group descriptors are going to be written during a
2091                  * restart, so set the superblock to be used to be the
2092                  * master superblock.
2093                  */
2094                 ctx->use_superblock = 0;
2095                 goto endit;
2096         }
2097
2098         if (ctx->large_dirs && !ext2fs_has_feature_largedir(ctx->fs->super)) {
2099                 ext2_filsys fs = ctx->fs;
2100
2101                 if (fix_problem(ctx, PR_2_FEATURE_LARGE_DIRS, &pctx)) {
2102                         ext2fs_set_feature_largedir(fs->super);
2103                         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2104                         ext2fs_mark_super_dirty(fs);
2105                 }
2106                 if (fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
2107                     fix_problem(ctx, PR_1_FS_REV_LEVEL, &pctx)) {
2108                         ext2fs_update_dynamic_rev(fs);
2109                         ext2fs_mark_super_dirty(fs);
2110                 }
2111         }
2112
2113         if (ctx->block_dup_map) {
2114                 if (ctx->options & E2F_OPT_PREEN) {
2115                         clear_problem_context(&pctx);
2116                         fix_problem(ctx, PR_1_DUP_BLOCKS_PREENSTOP, &pctx);
2117                 }
2118                 e2fsck_pass1_dupblocks(ctx, block_buf);
2119         }
2120         ctx->flags |= E2F_FLAG_ALLOC_OK;
2121 endit:
2122         e2fsck_use_inode_shortcuts(ctx, 0);
2123         ext2fs_free_mem(&inodes_to_process);
2124         inodes_to_process = 0;
2125
2126         if (scan)
2127                 ext2fs_close_inode_scan(scan);
2128         if (block_buf)
2129                 ext2fs_free_mem(&block_buf);
2130         if (inode)
2131                 ext2fs_free_mem(&inode);
2132
2133         /*
2134          * The l+f inode may have been cleared, so zap it now and
2135          * later passes will recalculate it if necessary
2136          */
2137         ctx->lost_and_found = 0;
2138
2139         if ((ctx->flags & E2F_FLAG_SIGNAL_MASK) == 0)
2140                 print_resource_track(ctx, _("Pass 1"), &rtrack, ctx->fs->io);
2141         else
2142                 ctx->invalid_bitmaps++;
2143 }
2144
2145 static void init_ext2_max_sizes()
2146 {
2147         int     i;
2148         __u64   max_sizes;
2149
2150         /*
2151          * Init ext2_max_sizes which will be immutable and shared between
2152          * threads
2153          */
2154 #define EXT2_BPP(bits) (1ULL << ((bits) - 2))
2155
2156         for (i = EXT2_MIN_BLOCK_LOG_SIZE; i <= EXT2_MAX_BLOCK_LOG_SIZE; i++) {
2157                 max_sizes = EXT2_NDIR_BLOCKS + EXT2_BPP(i);
2158                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i);
2159                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i) * EXT2_BPP(i);
2160                 max_sizes = (max_sizes * (1UL << i));
2161                 ext2_max_sizes[i - EXT2_MIN_BLOCK_LOG_SIZE] = max_sizes;
2162         }
2163 #undef EXT2_BPP
2164 }
2165
2166 #ifdef HAVE_PTHREAD
2167 static errcode_t e2fsck_pass1_copy_bitmap(ext2_filsys fs, ext2fs_generic_bitmap *src,
2168                                           ext2fs_generic_bitmap *dest)
2169 {
2170         errcode_t ret;
2171
2172         ret = ext2fs_copy_bitmap(*src, dest);
2173         if (ret)
2174                 return ret;
2175
2176         (*dest)->fs = fs;
2177
2178         return 0;
2179 }
2180
2181 static void e2fsck_pass1_free_bitmap(ext2fs_generic_bitmap *bitmap)
2182 {
2183         if (*bitmap) {
2184                 ext2fs_free_generic_bmap(*bitmap);
2185                 *bitmap = NULL;
2186         }
2187
2188 }
2189
2190 static errcode_t e2fsck_pass1_merge_bitmap(ext2_filsys fs, ext2fs_generic_bitmap *src,
2191                                           ext2fs_generic_bitmap *dest)
2192 {
2193         errcode_t ret = 0;
2194
2195         if (*src) {
2196                 if (*dest == NULL) {
2197                         *dest = *src;
2198                         *src = NULL;
2199                 } else {
2200                         ret = ext2fs_merge_bitmap(*src, *dest, NULL, NULL);
2201                         if (ret)
2202                                 return ret;
2203                 }
2204                 (*dest)->fs = fs;
2205         }
2206
2207         return 0;
2208 }
2209
2210 static errcode_t e2fsck_pass1_copy_fs(ext2_filsys dest, e2fsck_t src_context,
2211                                       ext2_filsys src)
2212 {
2213         errcode_t       retval;
2214
2215         memcpy(dest, src, sizeof(struct struct_ext2_filsys));
2216         dest->inode_map = NULL;
2217         dest->block_map = NULL;
2218         if (dest->dblist)
2219                 dest->dblist->fs = dest;
2220         if (src->block_map) {
2221                 retval = e2fsck_pass1_copy_bitmap(dest, &src->block_map,
2222                                                   &dest->block_map);
2223                 if (retval)
2224                         return retval;
2225         }
2226         if (src->inode_map) {
2227                 retval = e2fsck_pass1_copy_bitmap(dest, &src->inode_map,
2228                                                   &dest->inode_map);
2229                 if (retval)
2230                         return retval;
2231         }
2232
2233         if (src->badblocks) {
2234                 retval = ext2fs_badblocks_copy(src->badblocks, &dest->badblocks);
2235                 if (retval)
2236                         return retval;
2237         }
2238
2239         /* disable it for now */
2240         src_context->openfs_flags &= ~EXT2_FLAG_EXCLUSIVE;
2241         retval = ext2fs_open_channel(dest, src_context->io_options,
2242                                      src_context->io_manager,
2243                                      src_context->openfs_flags,
2244                                      src->io->block_size);
2245         if (retval)
2246                 return retval;
2247
2248         /* Block size might not be default */
2249         io_channel_set_blksize(dest->io, src->io->block_size);
2250         ehandler_init(dest->io);
2251
2252         assert(dest->io->magic == src->io->magic);
2253         assert(dest->io->manager == src->io->manager);
2254         assert(strcmp(dest->io->name, src->io->name) == 0);
2255         assert(dest->io->block_size == src->io->block_size);
2256         assert(dest->io->read_error == src->io->read_error);
2257         assert(dest->io->write_error == src->io->write_error);
2258         assert(dest->io->refcount == src->io->refcount);
2259         assert(dest->io->flags == src->io->flags);
2260         assert(dest->io->app_data == dest);
2261         assert(src->io->app_data == src);
2262         assert(dest->io->align == src->io->align);
2263
2264         /* The data should be written to disk immediately */
2265         dest->io->flags |= CHANNEL_FLAGS_WRITETHROUGH;
2266         /* icache will be rebuilt if needed, so do not copy from @src */
2267         src->icache = NULL;
2268         return 0;
2269 }
2270
2271 static int e2fsck_pass1_merge_fs(ext2_filsys dest, ext2_filsys src)
2272 {
2273         struct ext2_inode_cache *icache = dest->icache;
2274         errcode_t retval = 0;
2275         io_channel dest_io;
2276         io_channel dest_image_io;
2277         ext2fs_inode_bitmap inode_map;
2278         ext2fs_block_bitmap block_map;
2279
2280         dest_io = dest->io;
2281         dest_image_io = dest->image_io;
2282         inode_map = dest->inode_map;
2283         block_map = dest->block_map;
2284
2285         memcpy(dest, src, sizeof(struct struct_ext2_filsys));
2286         dest->io = dest_io;
2287         dest->image_io = dest_image_io;
2288         dest->icache = icache;
2289         dest->inode_map = inode_map;
2290         dest->block_map = block_map;
2291         if (dest->dblist)
2292                 dest->dblist->fs = dest;
2293
2294         if (src->icache) {
2295                 ext2fs_free_inode_cache(src->icache);
2296                 src->icache = NULL;
2297         }
2298
2299         retval = e2fsck_pass1_merge_bitmap(dest, &src->inode_map,
2300                                            &dest->inode_map);
2301         if (retval)
2302                 goto out;
2303
2304         retval = e2fsck_pass1_merge_bitmap(dest, &src->block_map,
2305                                           &dest->block_map);
2306         if (retval)
2307                 goto out;
2308
2309         if (src->badblocks) {
2310                 retval = ext2fs_badblocks_copy(src->badblocks, &dest->badblocks);
2311
2312                 ext2fs_badblocks_list_free(src->badblocks);
2313                 src->badblocks = NULL;
2314         }
2315 out:
2316         io_channel_close(src->io);
2317         if (src->inode_map)
2318                 ext2fs_free_generic_bmap(src->inode_map);
2319         if (src->block_map)
2320                 ext2fs_free_generic_bmap(src->block_map);
2321         return retval;
2322 }
2323
2324 static errcode_t e2fsck_pass1_thread_prepare(e2fsck_t global_ctx, e2fsck_t *thread_ctx,
2325                                              int thread_index, int num_threads)
2326 {
2327         errcode_t               retval;
2328         e2fsck_t                thread_context;
2329         ext2_filsys             thread_fs;
2330         ext2_filsys             global_fs = global_ctx->fs;
2331         struct e2fsck_thread    *tinfo;
2332         dgrp_t                  average_group;
2333
2334         assert(global_ctx->inode_used_map == NULL);
2335         assert(global_ctx->inode_dir_map == NULL);
2336         assert(global_ctx->inode_bb_map == NULL);
2337         assert(global_ctx->inode_imagic_map == NULL);
2338         assert(global_ctx->inode_reg_map == NULL);
2339         assert(global_ctx->inodes_to_rebuild == NULL);
2340
2341         assert(global_ctx->block_found_map == NULL);
2342         assert(global_ctx->block_dup_map == NULL);
2343         assert(global_ctx->block_ea_map == NULL);
2344         assert(global_ctx->block_metadata_map == NULL);
2345         assert(global_ctx->fs->dblist == NULL);
2346
2347         retval = ext2fs_get_mem(sizeof(struct e2fsck_struct), &thread_context);
2348         if (retval) {
2349                 com_err(global_ctx->program_name, retval, "while allocating memory");
2350                 return retval;
2351         }
2352         memcpy(thread_context, global_ctx, sizeof(struct e2fsck_struct));
2353         thread_context->global_ctx = global_ctx;
2354
2355         retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &thread_fs);
2356         if (retval) {
2357                 com_err(global_ctx->program_name, retval, "while allocating memory");
2358                 goto out_context;
2359         }
2360
2361         io_channel_flush_cleanup(global_fs->io);
2362         retval = e2fsck_pass1_copy_fs(thread_fs, global_ctx, global_fs);
2363         if (retval) {
2364                 com_err(global_ctx->program_name, retval, "while copying fs");
2365                 goto out_fs;
2366         }
2367         thread_fs->priv_data = thread_context;
2368
2369         thread_context->thread_info.et_thread_index = thread_index;
2370         set_up_logging(thread_context);
2371
2372         /*
2373          * Distribute work to multiple threads:
2374          * Each thread work on fs->group_desc_count / nthread groups.
2375          */
2376         tinfo = &thread_context->thread_info;
2377         average_group = thread_fs->group_desc_count / num_threads;
2378         if (average_group == 0)
2379                 average_group = 1;
2380         tinfo->et_group_start = average_group * thread_index;
2381         if (thread_index == num_threads - 1)
2382                 tinfo->et_group_end = thread_fs->group_desc_count;
2383         else
2384                 tinfo->et_group_end = average_group * (thread_index + 1);
2385         tinfo->et_group_next = tinfo->et_group_start;
2386         tinfo->et_inode_number = 0;
2387         tinfo->et_log_buf[0] = '\0';
2388         tinfo->et_log_length = 0;
2389         if (thread_context->options & E2F_OPT_MULTITHREAD)
2390                 log_out(thread_context, _("Scan group range [%d, %d)\n"),
2391                         tinfo->et_group_start, tinfo->et_group_end);
2392         thread_context->fs = thread_fs;
2393         *thread_ctx = thread_context;
2394         return 0;
2395 out_fs:
2396         ext2fs_free_mem(&thread_fs);
2397 out_context:
2398         ext2fs_free_mem(&thread_context);
2399         return retval;
2400 }
2401
2402 static void e2fsck_pass1_merge_dir_info(e2fsck_t global_ctx, e2fsck_t thread_ctx)
2403 {
2404         if (thread_ctx->dir_info == NULL)
2405                 return;
2406
2407         if (global_ctx->dir_info == NULL) {
2408                 global_ctx->dir_info = thread_ctx->dir_info;
2409                 thread_ctx->dir_info = NULL;
2410                 return;
2411         }
2412
2413         e2fsck_merge_dir_info(global_ctx, thread_ctx->dir_info,
2414                               global_ctx->dir_info);
2415 }
2416
2417 static int e2fsck_pass1_thread_join_one(e2fsck_t global_ctx, e2fsck_t thread_ctx)
2418 {
2419         errcode_t        retval;
2420         int              flags = global_ctx->flags;
2421         ext2_filsys      thread_fs = thread_ctx->fs;
2422         ext2_filsys      global_fs = global_ctx->fs;
2423         FILE            *global_logf = global_ctx->logf;
2424         FILE            *global_problem_logf = global_ctx->problem_logf;
2425         ext2fs_inode_bitmap inode_bad_map = global_ctx->inode_bad_map;
2426         struct dir_info_db *dir_info = global_ctx->dir_info;
2427         ext2fs_inode_bitmap inode_used_map = global_ctx->inode_used_map;
2428         ext2fs_inode_bitmap inode_dir_map = global_ctx->inode_dir_map;
2429         ext2fs_inode_bitmap inode_bb_map = global_ctx->inode_bb_map;
2430         ext2fs_inode_bitmap inode_imagic_map = global_ctx->inode_imagic_map;
2431         ext2fs_inode_bitmap inode_reg_map = global_ctx->inode_reg_map;
2432         ext2fs_block_bitmap block_found_map = global_ctx->block_found_map;
2433         ext2fs_block_bitmap block_dup_map = global_ctx->block_dup_map;
2434         ext2fs_block_bitmap block_ea_map = global_ctx->block_ea_map;
2435         ext2fs_block_bitmap block_metadata_map = global_ctx->block_metadata_map;
2436         ext2fs_block_bitmap inodes_to_rebuild = global_ctx->inodes_to_rebuild;
2437
2438 #ifdef HAVE_SETJMP_H
2439         jmp_buf          old_jmp;
2440
2441         memcpy(old_jmp, global_ctx->abort_loc, sizeof(jmp_buf));
2442 #endif
2443         memcpy(global_ctx, thread_ctx, sizeof(struct e2fsck_struct));
2444 #ifdef HAVE_SETJMP_H
2445         memcpy(global_ctx->abort_loc, old_jmp, sizeof(jmp_buf));
2446 #endif
2447
2448         global_ctx->inode_used_map = inode_used_map;
2449         global_ctx->inode_bad_map = inode_bad_map;
2450         global_ctx->inode_dir_map = inode_dir_map;
2451         global_ctx->inode_bb_map = inode_bb_map;
2452         global_ctx->inode_imagic_map = inode_imagic_map;
2453         global_ctx->inodes_to_rebuild = inodes_to_rebuild;
2454         global_ctx->inode_reg_map = inode_reg_map;
2455         global_ctx->block_found_map = block_found_map;
2456         global_ctx->block_dup_map = block_dup_map;
2457         global_ctx->block_ea_map = block_ea_map;
2458         global_ctx->block_metadata_map = block_metadata_map;
2459         global_ctx->dir_info = dir_info;
2460         e2fsck_pass1_merge_dir_info(global_ctx, thread_ctx);
2461
2462         /* Keep the global singal flags*/
2463         global_ctx->flags |= (flags & E2F_FLAG_SIGNAL_MASK) |
2464                              (global_ctx->flags & E2F_FLAG_SIGNAL_MASK);
2465
2466         retval = e2fsck_pass1_merge_fs(global_fs, thread_fs);
2467         if (retval) {
2468                 com_err(global_ctx->program_name, 0, _("while merging fs\n"));
2469                 return retval;
2470         }
2471         global_fs->priv_data = global_ctx;
2472         global_ctx->fs = global_fs;
2473         global_ctx->logf = global_logf;
2474         global_ctx->problem_logf = global_problem_logf;
2475         global_ctx->global_ctx = NULL;
2476
2477         retval = e2fsck_pass1_merge_bitmap(global_fs,
2478                                 &thread_ctx->inode_used_map,
2479                                 &global_ctx->inode_used_map);
2480         if (retval)
2481                 return retval;
2482
2483         retval = e2fsck_pass1_merge_bitmap(global_fs,
2484                                 &thread_ctx->inode_bad_map,
2485                                 &global_ctx->inode_bad_map);
2486         if (retval)
2487                 return retval;
2488         retval = e2fsck_pass1_merge_bitmap(global_fs,
2489                                         &thread_ctx->inode_dir_map,
2490                                         &global_ctx->inode_dir_map);
2491         if (retval)
2492                 return retval;
2493         retval = e2fsck_pass1_merge_bitmap(global_fs,
2494                                 &thread_ctx->inode_bb_map,
2495                                 &global_ctx->inode_bb_map);
2496         if (retval)
2497                 return retval;
2498         retval = e2fsck_pass1_merge_bitmap(global_fs,
2499                                 &thread_ctx->inode_imagic_map,
2500                                 &global_ctx->inode_imagic_map);
2501         if (retval)
2502                 return retval;
2503         retval = e2fsck_pass1_merge_bitmap(global_fs,
2504                                 &thread_ctx->inode_reg_map,
2505                                 &global_ctx->inode_reg_map);
2506         if (retval)
2507                 return retval;
2508         retval = e2fsck_pass1_merge_bitmap(global_fs,
2509                                 &thread_ctx->inodes_to_rebuild,
2510                                 &global_ctx->inodes_to_rebuild);
2511         if (retval)
2512                 return retval;
2513         retval = e2fsck_pass1_merge_bitmap(global_fs,
2514                                 &thread_ctx->block_found_map,
2515                                 &global_ctx->block_found_map);
2516         if (retval)
2517                 return retval;
2518         retval = e2fsck_pass1_merge_bitmap(global_fs,
2519                                 &thread_ctx->block_dup_map,
2520                                 &global_ctx->block_dup_map);
2521         if (retval)
2522                 return retval;
2523         retval = e2fsck_pass1_merge_bitmap(global_fs,
2524                                 &thread_ctx->block_ea_map,
2525                                 &global_ctx->block_ea_map);
2526         if (retval)
2527                 return retval;
2528         retval = e2fsck_pass1_merge_bitmap(global_fs,
2529                                 &thread_ctx->block_metadata_map,
2530                                 &global_ctx->block_metadata_map);
2531         if (retval)
2532                 return retval;
2533
2534         return 0;
2535 }
2536
2537 static int e2fsck_pass1_thread_join(e2fsck_t global_ctx, e2fsck_t thread_ctx)
2538 {
2539         errcode_t       retval;
2540
2541         retval = e2fsck_pass1_thread_join_one(global_ctx, thread_ctx);
2542         ext2fs_free_mem(&thread_ctx->fs);
2543         if (thread_ctx->logf)
2544                 fclose(thread_ctx->logf);
2545         if (thread_ctx->problem_logf) {
2546                 fputs("</problem_log>\n", thread_ctx->problem_logf);
2547                 fclose(thread_ctx->problem_logf);
2548         }
2549         e2fsck_pass1_free_bitmap(&thread_ctx->inode_used_map);
2550         e2fsck_pass1_free_bitmap(&thread_ctx->inode_bad_map);
2551         e2fsck_pass1_free_bitmap(&thread_ctx->inode_dir_map);
2552         e2fsck_pass1_free_bitmap(&thread_ctx->inode_bb_map);
2553         e2fsck_pass1_free_bitmap(&thread_ctx->inode_imagic_map);
2554         e2fsck_pass1_free_bitmap(&thread_ctx->inode_reg_map);
2555         e2fsck_pass1_free_bitmap(&thread_ctx->inodes_to_rebuild);
2556         e2fsck_pass1_free_bitmap(&thread_ctx->block_found_map);
2557         e2fsck_pass1_free_bitmap(&thread_ctx->block_dup_map);
2558         e2fsck_pass1_free_bitmap(&thread_ctx->block_ea_map);
2559         e2fsck_pass1_free_bitmap(&thread_ctx->block_metadata_map);
2560         e2fsck_free_dir_info(thread_ctx);
2561         ext2fs_free_mem(&thread_ctx);
2562
2563         return retval;
2564 }
2565
2566 static int e2fsck_pass1_threads_join(struct e2fsck_thread_info *infos,
2567                                       int num_threads, e2fsck_t global_ctx)
2568 {
2569         errcode_t                        rc;
2570         errcode_t                        ret = 0;
2571         int                              i;
2572         struct e2fsck_thread_info       *pinfo;
2573
2574         for (i = 0; i < num_threads; i++) {
2575                 pinfo = &infos[i];
2576
2577                 if (!pinfo->eti_started)
2578                         continue;
2579
2580                 rc = pthread_join(pinfo->eti_thread_id, NULL);
2581                 if (rc) {
2582                         com_err(global_ctx->program_name, rc,
2583                                 _("while joining thread\n"));
2584                         if (ret == 0)
2585                                 ret = rc;
2586                 }
2587                 rc = e2fsck_pass1_thread_join(global_ctx, infos[i].eti_thread_ctx);
2588                 if (rc) {
2589                         com_err(global_ctx->program_name, rc,
2590                                 _("while joining pass1 thread\n"));
2591                         if (ret == 0)
2592                                 ret = rc;
2593                 }
2594         }
2595         free(infos);
2596
2597         return ret;
2598 }
2599
2600 static void *e2fsck_pass1_thread(void *arg)
2601 {
2602         struct e2fsck_thread_info       *info = arg;
2603         e2fsck_t                         thread_ctx = info->eti_thread_ctx;
2604
2605 #ifdef HAVE_SETJMP_H
2606         /*
2607          * When fatal_error() happens, jump to here. The thread
2608          * context's flags will be saved, but its abort_loc will
2609          * be overwritten by original jump buffer for the later
2610          * tests.
2611          */
2612         if (setjmp(thread_ctx->abort_loc)) {
2613                 thread_ctx->flags &= ~E2F_FLAG_SETJMP_OK;
2614                 goto out;
2615         }
2616         thread_ctx->flags |= E2F_FLAG_SETJMP_OK;
2617 #endif
2618
2619         e2fsck_pass1_run(thread_ctx);
2620
2621 out:
2622         if (thread_ctx->options & E2F_OPT_MULTITHREAD)
2623                 log_out(thread_ctx,
2624                         _("Scanned group range [%lu, %lu), inodes %lu\n"),
2625                         thread_ctx->thread_info.et_group_start,
2626                         thread_ctx->thread_info.et_group_end,
2627                         thread_ctx->thread_info.et_inode_number);
2628         return NULL;
2629 }
2630
2631 static int e2fsck_pass1_threads_start(struct e2fsck_thread_info **pinfo,
2632                                       int num_threads, e2fsck_t global_ctx)
2633 {
2634         struct e2fsck_thread_info       *infos;
2635         pthread_attr_t                   attr;
2636         errcode_t                        retval;
2637         errcode_t                        ret;
2638         struct e2fsck_thread_info       *tmp_pinfo;
2639         int                              i;
2640         e2fsck_t                         thread_ctx;
2641
2642         retval = pthread_attr_init(&attr);
2643         if (retval) {
2644                 com_err(global_ctx->program_name, retval,
2645                         _("while setting pthread attribute\n"));
2646                 return retval;
2647         }
2648
2649         infos = calloc(num_threads, sizeof(struct e2fsck_thread_info));
2650         if (infos == NULL) {
2651                 retval = -ENOMEM;
2652                 com_err(global_ctx->program_name, retval,
2653                         _("while allocating memory for threads\n"));
2654                 pthread_attr_destroy(&attr);
2655                 return retval;
2656         }
2657
2658         for (i = 0; i < num_threads; i++) {
2659                 tmp_pinfo = &infos[i];
2660                 tmp_pinfo->eti_thread_index = i;
2661                 retval = e2fsck_pass1_thread_prepare(global_ctx, &thread_ctx,
2662                                                      i, num_threads);
2663                 if (retval) {
2664                         com_err(global_ctx->program_name, retval,
2665                                 _("while preparing pass1 thread\n"));
2666                         break;
2667                 }
2668                 tmp_pinfo->eti_thread_ctx = thread_ctx;
2669
2670                 retval = pthread_create(&tmp_pinfo->eti_thread_id, &attr,
2671                                         &e2fsck_pass1_thread, tmp_pinfo);
2672                 if (retval) {
2673                         com_err(global_ctx->program_name, retval,
2674                                 _("while creating thread\n"));
2675                         e2fsck_pass1_thread_join(global_ctx, thread_ctx);
2676                         break;
2677                 }
2678
2679                 tmp_pinfo->eti_started = 1;
2680         }
2681
2682         /* destroy the thread attribute object, since it is no longer needed */
2683         ret = pthread_attr_destroy(&attr);
2684         if (ret) {
2685                 com_err(global_ctx->program_name, ret,
2686                         _("while destroying thread attribute\n"));
2687                 if (retval == 0)
2688                         retval = ret;
2689         }
2690
2691         if (retval) {
2692                 e2fsck_pass1_threads_join(infos, num_threads, global_ctx);
2693                 return retval;
2694         }
2695         *pinfo = infos;
2696         return 0;
2697 }
2698
2699 static void e2fsck_pass1_multithread(e2fsck_t global_ctx)
2700 {
2701         struct e2fsck_thread_info       *infos = NULL;
2702         int                              num_threads = 1;
2703         errcode_t                        retval;
2704
2705         retval = e2fsck_pass1_threads_start(&infos, num_threads, global_ctx);
2706         if (retval) {
2707                 com_err(global_ctx->program_name, retval,
2708                         _("while starting pass1 threads\n"));
2709                 goto out_abort;
2710         }
2711
2712         retval = e2fsck_pass1_threads_join(infos, num_threads, global_ctx);
2713         if (retval) {
2714                 com_err(global_ctx->program_name, retval,
2715                         _("while joining pass1 threads\n"));
2716                 goto out_abort;
2717         }
2718         return;
2719 out_abort:
2720         global_ctx->flags |= E2F_FLAG_ABORT;
2721         return;
2722 }
2723 #endif
2724
2725 /* TODO: tdb needs to be handled properly for multiple threads*/
2726 static int multiple_threads_supported(e2fsck_t ctx)
2727 {
2728 #ifdef  CONFIG_TDB
2729         unsigned int            threshold;
2730         ext2_ino_t              num_dirs;
2731         errcode_t               retval;
2732         char                    *tdb_dir;
2733         int                     enable;
2734
2735         profile_get_string(ctx->profile, "scratch_files", "directory", 0, 0,
2736                            &tdb_dir);
2737         profile_get_uint(ctx->profile, "scratch_files",
2738                          "numdirs_threshold", 0, 0, &threshold);
2739         profile_get_boolean(ctx->profile, "scratch_files",
2740                             "icount", 0, 1, &enable);
2741
2742         retval = ext2fs_get_num_dirs(ctx->fs, &num_dirs);
2743         if (retval)
2744                 num_dirs = 1024;        /* Guess */
2745
2746         /* tdb is unsupported now */
2747         if (enable && tdb_dir && !access(tdb_dir, W_OK) &&
2748             (!threshold || num_dirs > threshold))
2749                 return 0;
2750  #endif
2751         return 1;
2752 }
2753
2754 void e2fsck_pass1(e2fsck_t ctx)
2755 {
2756
2757         init_ext2_max_sizes();
2758 #ifdef HAVE_PTHREAD
2759         if (multiple_threads_supported(ctx)) {
2760                 e2fsck_pass1_multithread(ctx);
2761                 return;
2762         }
2763         fprintf(stderr, "Fall through single thread for pass1 "
2764                         "because tdb could not handle properly\n");
2765 #endif
2766         e2fsck_pass1_run(ctx);
2767 }
2768
2769 #undef FINISH_INODE_LOOP
2770
2771 /*
2772  * When the inode_scan routines call this callback at the end of the
2773  * glock group, call process_inodes.
2774  */
2775 static errcode_t scan_callback(ext2_filsys fs,
2776                                ext2_inode_scan scan EXT2FS_ATTR((unused)),
2777                                dgrp_t group, void * priv_data)
2778 {
2779         struct scan_callback_struct *scan_struct;
2780         e2fsck_t ctx;
2781         struct e2fsck_thread *tinfo;
2782
2783         scan_struct = (struct scan_callback_struct *) priv_data;
2784         ctx = scan_struct->ctx;
2785
2786         process_inodes((e2fsck_t) fs->priv_data, scan_struct->block_buf,
2787                        scan_struct->inodes_to_process,
2788                        scan_struct->process_inode_count);
2789
2790         if (ctx->progress)
2791                 if ((ctx->progress)(ctx, 1, group+1,
2792                                     ctx->fs->group_desc_count))
2793                         return EXT2_ET_CANCEL_REQUESTED;
2794
2795 #ifdef HAVE_PTHREAD
2796         if (ctx->global_ctx) {
2797                 tinfo = &ctx->thread_info;
2798                 tinfo->et_group_next++;
2799                 if (ctx->options & E2F_OPT_DEBUG &&
2800                     ctx->options & E2F_OPT_MULTITHREAD)
2801                         log_out(ctx, _("group %d finished\n"),
2802                                 tinfo->et_group_next);
2803                 if (tinfo->et_group_next >= tinfo->et_group_end)
2804                         return EXT2_ET_SCAN_FINISHED;
2805         }
2806 #endif
2807
2808         return 0;
2809 }
2810
2811 /*
2812  * Process the inodes in the "inodes to process" list.
2813  */
2814 static void process_inodes(e2fsck_t ctx, char *block_buf,
2815                            struct process_inode_block *inodes_to_process,
2816                            int *process_inode_count)
2817 {
2818         int                     i;
2819         struct ext2_inode       *old_stashed_inode;
2820         ext2_ino_t              old_stashed_ino;
2821         const char              *old_operation;
2822         char                    buf[80];
2823         struct problem_context  pctx;
2824
2825 #if 0
2826         printf("begin process_inodes: ");
2827 #endif
2828         if (*process_inode_count == 0)
2829                 return;
2830         old_operation = ehandler_operation(0);
2831         old_stashed_inode = ctx->stashed_inode;
2832         old_stashed_ino = ctx->stashed_ino;
2833         qsort(inodes_to_process, *process_inode_count,
2834                       sizeof(struct process_inode_block), process_inode_cmp);
2835         clear_problem_context(&pctx);
2836         for (i=0; i < *process_inode_count; i++) {
2837                 pctx.inode = ctx->stashed_inode =
2838                         (struct ext2_inode *) &inodes_to_process[i].inode;
2839                 pctx.ino = ctx->stashed_ino = inodes_to_process[i].ino;
2840
2841 #if 0
2842                 printf("%u ", pctx.ino);
2843 #endif
2844                 sprintf(buf, _("reading indirect blocks of inode %u"),
2845                         pctx.ino);
2846                 ehandler_operation(buf);
2847                 check_blocks(ctx, &pctx, block_buf,
2848                              &inodes_to_process[i].ea_ibody_quota);
2849                 if (e2fsck_should_abort(ctx))
2850                         break;
2851         }
2852         ctx->stashed_inode = old_stashed_inode;
2853         ctx->stashed_ino = old_stashed_ino;
2854         *process_inode_count = 0;
2855 #if 0
2856         printf("end process inodes\n");
2857 #endif
2858         ehandler_operation(old_operation);
2859 }
2860
2861 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b)
2862 {
2863         const struct process_inode_block *ib_a =
2864                 (const struct process_inode_block *) a;
2865         const struct process_inode_block *ib_b =
2866                 (const struct process_inode_block *) b;
2867         int     ret;
2868
2869         ret = (ib_a->inode.i_block[EXT2_IND_BLOCK] -
2870                ib_b->inode.i_block[EXT2_IND_BLOCK]);
2871         if (ret == 0)
2872                 /*
2873                  * We only call process_inodes() for non-extent
2874                  * inodes, so it's OK to pass NULL to
2875                  * ext2fs_file_acl_block() here.
2876                  */
2877                 ret = ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_a->inode)) -
2878                         ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_b->inode));
2879         if (ret == 0)
2880                 ret = ib_a->ino - ib_b->ino;
2881         return ret;
2882 }
2883
2884 /*
2885  * Mark an inode as being bad in some what
2886  */
2887 static void mark_inode_bad(e2fsck_t ctx, ino_t ino)
2888 {
2889         struct          problem_context pctx;
2890
2891         if (!ctx->inode_bad_map) {
2892                 clear_problem_context(&pctx);
2893
2894                 pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2895                                 _("bad inode map"), EXT2FS_BMAP64_RBTREE,
2896                                 "inode_bad_map", &ctx->inode_bad_map);
2897                 if (pctx.errcode) {
2898                         pctx.num = 3;
2899                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2900                         /* Should never get here */
2901                         ctx->flags |= E2F_FLAG_ABORT;
2902                         return;
2903                 }
2904         }
2905         ext2fs_mark_inode_bitmap2(ctx->inode_bad_map, ino);
2906 }
2907
2908 static void add_casefolded_dir(e2fsck_t ctx, ino_t ino)
2909 {
2910         struct          problem_context pctx;
2911
2912         if (!ctx->casefolded_dirs) {
2913                 pctx.errcode = ext2fs_u32_list_create(&ctx->casefolded_dirs, 0);
2914                 if (pctx.errcode)
2915                         goto error;
2916         }
2917         pctx.errcode = ext2fs_u32_list_add(ctx->casefolded_dirs, ino);
2918         if (pctx.errcode == 0)
2919                 return;
2920 error:
2921         fix_problem(ctx, PR_1_ALLOCATE_CASEFOLDED_DIRLIST, &pctx);
2922         /* Should never get here */
2923         ctx->flags |= E2F_FLAG_ABORT;
2924 }
2925
2926 /*
2927  * This procedure will allocate the inode "bb" (badblock) map table
2928  */
2929 static void alloc_bb_map(e2fsck_t ctx)
2930 {
2931         struct          problem_context pctx;
2932
2933         clear_problem_context(&pctx);
2934         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2935                         _("inode in bad block map"), EXT2FS_BMAP64_RBTREE,
2936                         "inode_bb_map", &ctx->inode_bb_map);
2937         if (pctx.errcode) {
2938                 pctx.num = 4;
2939                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2940                 /* Should never get here */
2941                 ctx->flags |= E2F_FLAG_ABORT;
2942                 return;
2943         }
2944 }
2945
2946 /*
2947  * This procedure will allocate the inode imagic table
2948  */
2949 static void alloc_imagic_map(e2fsck_t ctx)
2950 {
2951         struct          problem_context pctx;
2952
2953         clear_problem_context(&pctx);
2954         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2955                         _("imagic inode map"), EXT2FS_BMAP64_RBTREE,
2956                         "inode_imagic_map", &ctx->inode_imagic_map);
2957         if (pctx.errcode) {
2958                 pctx.num = 5;
2959                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2960                 /* Should never get here */
2961                 ctx->flags |= E2F_FLAG_ABORT;
2962                 return;
2963         }
2964 }
2965
2966 /*
2967  * Marks a block as in use, setting the dup_map if it's been set
2968  * already.  Called by process_block and process_bad_block.
2969  *
2970  * WARNING: Assumes checks have already been done to make sure block
2971  * is valid.  This is true in both process_block and process_bad_block.
2972  */
2973 static _INLINE_ void mark_block_used(e2fsck_t ctx, blk64_t block)
2974 {
2975         struct          problem_context pctx;
2976
2977         clear_problem_context(&pctx);
2978
2979         if (ext2fs_fast_test_block_bitmap2(ctx->block_found_map, block)) {
2980                 if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2981                     !(ctx->options & E2F_OPT_UNSHARE_BLOCKS)) {
2982                         return;
2983                 }
2984                 if (!ctx->block_dup_map) {
2985                         pctx.errcode = e2fsck_allocate_block_bitmap(ctx->fs,
2986                                         _("multiply claimed block map"),
2987                                         EXT2FS_BMAP64_RBTREE, "block_dup_map",
2988                                         &ctx->block_dup_map);
2989                         if (pctx.errcode) {
2990                                 pctx.num = 3;
2991                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR,
2992                                             &pctx);
2993                                 /* Should never get here */
2994                                 ctx->flags |= E2F_FLAG_ABORT;
2995                                 return;
2996                         }
2997                 }
2998                 ext2fs_fast_mark_block_bitmap2(ctx->block_dup_map, block);
2999         } else {
3000                 ext2fs_fast_mark_block_bitmap2(ctx->block_found_map, block);
3001         }
3002 }
3003
3004 /*
3005  * When cluster size is greater than one block, it is caller's responsibility
3006  * to make sure block parameter starts at a cluster boundary.
3007  */
3008 static _INLINE_ void mark_blocks_used(e2fsck_t ctx, blk64_t block,
3009                                       unsigned int num)
3010 {
3011         if (ext2fs_test_block_bitmap_range2(ctx->block_found_map, block, num))
3012                 ext2fs_mark_block_bitmap_range2(ctx->block_found_map, block, num);
3013         else {
3014                 unsigned int i;
3015
3016                 for (i = 0; i < num; i += EXT2FS_CLUSTER_RATIO(ctx->fs))
3017                         mark_block_used(ctx, block + i);
3018         }
3019 }
3020
3021 /*
3022  * Adjust the extended attribute block's reference counts at the end
3023  * of pass 1, either by subtracting out references for EA blocks that
3024  * are still referenced in ctx->refcount, or by adding references for
3025  * EA blocks that had extra references as accounted for in
3026  * ctx->refcount_extra.
3027  */
3028 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
3029                                     char *block_buf, int adjust_sign)
3030 {
3031         struct ext2_ext_attr_header     *header;
3032         struct problem_context          pctx;
3033         ext2_filsys                     fs = ctx->fs;
3034         blk64_t                         blk;
3035         __u32                           should_be;
3036         ea_value_t                      count;
3037
3038         clear_problem_context(&pctx);
3039
3040         ea_refcount_intr_begin(refcount);
3041         while (1) {
3042                 if ((blk = ea_refcount_intr_next(refcount, &count)) == 0)
3043                         break;
3044                 pctx.blk = blk;
3045                 pctx.errcode = ext2fs_read_ext_attr3(fs, blk, block_buf,
3046                                                      pctx.ino);
3047                 if (pctx.errcode) {
3048                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
3049                         return;
3050                 }
3051                 header = (struct ext2_ext_attr_header *) block_buf;
3052                 pctx.blkcount = header->h_refcount;
3053                 should_be = header->h_refcount + adjust_sign * (int)count;
3054                 pctx.num = should_be;
3055                 if (fix_problem(ctx, PR_1_EXTATTR_REFCOUNT, &pctx)) {
3056                         header->h_refcount = should_be;
3057                         pctx.errcode = ext2fs_write_ext_attr3(fs, blk,
3058                                                              block_buf,
3059                                                              pctx.ino);
3060                         if (pctx.errcode) {
3061                                 fix_problem(ctx, PR_1_EXTATTR_WRITE_ABORT,
3062                                             &pctx);
3063                                 continue;
3064                         }
3065                 }
3066         }
3067 }
3068
3069 /*
3070  * Handle processing the extended attribute blocks
3071  */
3072 static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx,
3073                            char *block_buf, struct ea_quota *ea_block_quota)
3074 {
3075         ext2_filsys fs = ctx->fs;
3076         ext2_ino_t      ino = pctx->ino;
3077         struct ext2_inode *inode = pctx->inode;
3078         blk64_t         blk;
3079         char *          end;
3080         struct ext2_ext_attr_header *header;
3081         struct ext2_ext_attr_entry *first, *entry;
3082         blk64_t         quota_blocks = EXT2FS_C2B(fs, 1);
3083         __u64           quota_inodes = 0;
3084         region_t        region = 0;
3085         int             failed_csum = 0;
3086
3087         ea_block_quota->blocks = 0;
3088         ea_block_quota->inodes = 0;
3089
3090         blk = ext2fs_file_acl_block(fs, inode);
3091         if (blk == 0)
3092                 return 0;
3093
3094         /*
3095          * If the Extended attribute flag isn't set, then a non-zero
3096          * file acl means that the inode is corrupted.
3097          *
3098          * Or if the extended attribute block is an invalid block,
3099          * then the inode is also corrupted.
3100          */
3101         if (!ext2fs_has_feature_xattr(fs->super) ||
3102             (blk < fs->super->s_first_data_block) ||
3103             (blk >= ext2fs_blocks_count(fs->super))) {
3104                 mark_inode_bad(ctx, ino);
3105                 return 0;
3106         }
3107
3108         /* If ea bitmap hasn't been allocated, create it */
3109         if (!ctx->block_ea_map) {
3110                 pctx->errcode = e2fsck_allocate_block_bitmap(fs,
3111                                         _("ext attr block map"),
3112                                         EXT2FS_BMAP64_RBTREE, "block_ea_map",
3113                                         &ctx->block_ea_map);
3114                 if (pctx->errcode) {
3115                         pctx->num = 2;
3116                         fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, pctx);
3117                         ctx->flags |= E2F_FLAG_ABORT;
3118                         return 0;
3119                 }
3120         }
3121
3122         /* Create the EA refcount structure if necessary */
3123         if (!ctx->refcount) {
3124                 pctx->errcode = ea_refcount_create(0, &ctx->refcount);
3125                 if (pctx->errcode) {
3126                         pctx->num = 1;
3127                         fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
3128                         ctx->flags |= E2F_FLAG_ABORT;
3129                         return 0;
3130                 }
3131         }
3132
3133 #if 0
3134         /* Debugging text */
3135         printf("Inode %u has EA block %u\n", ino, blk);
3136 #endif
3137
3138         /* Have we seen this EA block before? */
3139         if (ext2fs_fast_test_block_bitmap2(ctx->block_ea_map, blk)) {
3140                 ea_block_quota->blocks = EXT2FS_C2B(fs, 1);
3141                 ea_block_quota->inodes = 0;
3142
3143                 if (ctx->ea_block_quota_blocks) {
3144                         ea_refcount_fetch(ctx->ea_block_quota_blocks, blk,
3145                                           &quota_blocks);
3146                         if (quota_blocks)
3147                                 ea_block_quota->blocks = quota_blocks;
3148                 }
3149
3150                 if (ctx->ea_block_quota_inodes)
3151                         ea_refcount_fetch(ctx->ea_block_quota_inodes, blk,
3152                                           &ea_block_quota->inodes);
3153
3154                 if (ea_refcount_decrement(ctx->refcount, blk, 0) == 0)
3155                         return 1;
3156                 /* Ooops, this EA was referenced more than it stated */
3157                 if (!ctx->refcount_extra) {
3158                         pctx->errcode = ea_refcount_create(0,
3159                                            &ctx->refcount_extra);
3160                         if (pctx->errcode) {
3161                                 pctx->num = 2;
3162                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
3163                                 ctx->flags |= E2F_FLAG_ABORT;
3164                                 return 0;
3165                         }
3166                 }
3167                 ea_refcount_increment(ctx->refcount_extra, blk, 0);
3168                 return 1;
3169         }
3170
3171         /*
3172          * OK, we haven't seen this EA block yet.  So we need to
3173          * validate it
3174          */
3175         pctx->blk = blk;
3176         pctx->errcode = ext2fs_read_ext_attr3(fs, blk, block_buf, pctx->ino);
3177         if (pctx->errcode == EXT2_ET_EXT_ATTR_CSUM_INVALID) {
3178                 pctx->errcode = 0;
3179                 failed_csum = 1;
3180         } else if (pctx->errcode == EXT2_ET_BAD_EA_HEADER)
3181                 pctx->errcode = 0;
3182
3183         if (pctx->errcode &&
3184             fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx)) {
3185                 pctx->errcode = 0;
3186                 goto clear_extattr;
3187         }
3188         header = (struct ext2_ext_attr_header *) block_buf;
3189         pctx->blk = ext2fs_file_acl_block(fs, inode);
3190         if (((ctx->ext_attr_ver == 1) &&
3191              (header->h_magic != EXT2_EXT_ATTR_MAGIC_v1)) ||
3192             ((ctx->ext_attr_ver == 2) &&
3193              (header->h_magic != EXT2_EXT_ATTR_MAGIC))) {
3194                 if (fix_problem(ctx, PR_1_BAD_EA_BLOCK, pctx))
3195                         goto clear_extattr;
3196         }
3197
3198         if (header->h_blocks != 1) {
3199                 if (fix_problem(ctx, PR_1_EA_MULTI_BLOCK, pctx))
3200                         goto clear_extattr;
3201         }
3202
3203         if (pctx->errcode && fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx))
3204                 goto clear_extattr;
3205
3206         region = region_create(0, fs->blocksize);
3207         if (!region) {
3208                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
3209                 ctx->flags |= E2F_FLAG_ABORT;
3210                 return 0;
3211         }
3212         if (region_allocate(region, 0, sizeof(struct ext2_ext_attr_header))) {
3213                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
3214                         goto clear_extattr;
3215         }
3216
3217         first = (struct ext2_ext_attr_entry *)(header+1);
3218         end = block_buf + fs->blocksize;
3219         entry = first;
3220         while ((char *)entry < end && *(__u32 *)entry) {
3221                 __u32 hash;
3222
3223                 if (region_allocate(region, (char *)entry - (char *)header,
3224                                    EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
3225                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
3226                                 goto clear_extattr;
3227                         break;
3228                 }
3229                 if ((ctx->ext_attr_ver == 1 &&
3230                      (entry->e_name_len == 0 || entry->e_name_index != 0)) ||
3231                     (ctx->ext_attr_ver == 2 &&
3232                      entry->e_name_index == 0)) {
3233                         if (fix_problem(ctx, PR_1_EA_BAD_NAME, pctx))
3234                                 goto clear_extattr;
3235                         break;
3236                 }
3237                 if (entry->e_value_inum == 0) {
3238                         if (entry->e_value_offs + entry->e_value_size >
3239                             fs->blocksize) {
3240                                 if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
3241                                         goto clear_extattr;
3242                                 break;
3243                         }
3244                         if (entry->e_value_size &&
3245                             region_allocate(region, entry->e_value_offs,
3246                                             EXT2_EXT_ATTR_SIZE(entry->e_value_size))) {
3247                                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION,
3248                                                 pctx))
3249                                         goto clear_extattr;
3250                         }
3251
3252                         hash = ext2fs_ext_attr_hash_entry(entry, block_buf +
3253                                                           entry->e_value_offs);
3254
3255                         if (entry->e_hash != hash) {
3256                                 pctx->num = entry->e_hash;
3257                                 if (fix_problem(ctx, PR_1_ATTR_HASH, pctx))
3258                                         goto clear_extattr;
3259                                 entry->e_hash = hash;
3260                         }
3261                 } else {
3262                         problem_t problem;
3263                         blk64_t entry_quota_blocks;
3264
3265                         problem = check_large_ea_inode(ctx, entry, pctx,
3266                                                        &entry_quota_blocks);
3267                         if (problem && fix_problem(ctx, problem, pctx))
3268                                 goto clear_extattr;
3269
3270                         quota_blocks += entry_quota_blocks;
3271                         quota_inodes++;
3272                 }
3273
3274                 entry = EXT2_EXT_ATTR_NEXT(entry);
3275         }
3276         if (region_allocate(region, (char *)entry - (char *)header, 4)) {
3277                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
3278                         goto clear_extattr;
3279         }
3280         region_free(region);
3281
3282         /*
3283          * We only get here if there was no other errors that were fixed.
3284          * If there was a checksum fail, ask to correct it.
3285          */
3286         if (failed_csum &&
3287             fix_problem(ctx, PR_1_EA_BLOCK_ONLY_CSUM_INVALID, pctx)) {
3288                 pctx->errcode = ext2fs_write_ext_attr3(fs, blk, block_buf,
3289                                                        pctx->ino);
3290                 if (pctx->errcode)
3291                         return 0;
3292         }
3293
3294         if (quota_blocks != EXT2FS_C2B(fs, 1U)) {
3295                 if (!ctx->ea_block_quota_blocks) {
3296                         pctx->errcode = ea_refcount_create(0,
3297                                                 &ctx->ea_block_quota_blocks);
3298                         if (pctx->errcode) {
3299                                 pctx->num = 3;
3300                                 goto refcount_fail;
3301                         }
3302                 }
3303                 ea_refcount_store(ctx->ea_block_quota_blocks, blk,
3304                                   quota_blocks);
3305         }
3306
3307         if (quota_inodes) {
3308                 if (!ctx->ea_block_quota_inodes) {
3309                         pctx->errcode = ea_refcount_create(0,
3310                                                 &ctx->ea_block_quota_inodes);
3311                         if (pctx->errcode) {
3312                                 pctx->num = 4;
3313 refcount_fail:
3314                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
3315                                 ctx->flags |= E2F_FLAG_ABORT;
3316                                 return 0;
3317                         }
3318                 }
3319
3320                 ea_refcount_store(ctx->ea_block_quota_inodes, blk,
3321                                   quota_inodes);
3322         }
3323         ea_block_quota->blocks = quota_blocks;
3324         ea_block_quota->inodes = quota_inodes;
3325
3326         inc_ea_inode_refs(ctx, pctx, first, end);
3327         ea_refcount_store(ctx->refcount, blk, header->h_refcount - 1);
3328         mark_block_used(ctx, blk);
3329         ext2fs_fast_mark_block_bitmap2(ctx->block_ea_map, blk);
3330         return 1;
3331
3332 clear_extattr:
3333         if (region)
3334                 region_free(region);
3335         ext2fs_file_acl_block_set(fs, inode, 0);
3336         e2fsck_write_inode(ctx, ino, inode, "check_ext_attr");
3337         return 0;
3338 }
3339
3340 /* Returns 1 if bad htree, 0 if OK */
3341 static int handle_htree(e2fsck_t ctx, struct problem_context *pctx,
3342                         ext2_ino_t ino, struct ext2_inode *inode,
3343                         char *block_buf)
3344 {
3345         struct ext2_dx_root_info        *root;
3346         ext2_filsys                     fs = ctx->fs;
3347         errcode_t                       retval;
3348         blk64_t                         blk;
3349
3350         if ((!LINUX_S_ISDIR(inode->i_mode) &&
3351              fix_problem(ctx, PR_1_HTREE_NODIR, pctx)) ||
3352             (!ext2fs_has_feature_dir_index(fs->super) &&
3353              fix_problem(ctx, PR_1_HTREE_SET, pctx)))
3354                 return 1;
3355
3356         pctx->errcode = ext2fs_bmap2(fs, ino, inode, 0, 0, 0, 0, &blk);
3357
3358         if ((pctx->errcode) ||
3359             (blk == 0) ||
3360             (blk < fs->super->s_first_data_block) ||
3361             (blk >= ext2fs_blocks_count(fs->super))) {
3362                 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
3363                         return 1;
3364                 else
3365                         return 0;
3366         }
3367
3368         retval = io_channel_read_blk64(fs->io, blk, 1, block_buf);
3369         if (retval && fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
3370                 return 1;
3371
3372         /* XXX should check that beginning matches a directory */
3373         root = (struct ext2_dx_root_info *) (block_buf + 24);
3374
3375         if ((root->reserved_zero || root->info_length < 8) &&
3376             fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
3377                 return 1;
3378
3379         pctx->num = root->hash_version;
3380         if ((root->hash_version != EXT2_HASH_LEGACY) &&
3381             (root->hash_version != EXT2_HASH_HALF_MD4) &&
3382             (root->hash_version != EXT2_HASH_TEA) &&
3383             (root->hash_version != EXT2_HASH_SIPHASH) &&
3384             fix_problem(ctx, PR_1_HTREE_HASHV, pctx))
3385                 return 1;
3386
3387         if (ext4_hash_in_dirent(inode)) {
3388                 if (root->hash_version != EXT2_HASH_SIPHASH &&
3389                     fix_problem(ctx, PR_1_HTREE_NEEDS_SIPHASH, pctx))
3390                         return 1;
3391         } else {
3392                 if (root->hash_version == EXT2_HASH_SIPHASH &&
3393                    fix_problem(ctx, PR_1_HTREE_CANNOT_SIPHASH, pctx))
3394                         return 1;
3395         }
3396
3397         if ((root->unused_flags & EXT2_HASH_FLAG_INCOMPAT) &&
3398             fix_problem(ctx, PR_1_HTREE_INCOMPAT, pctx))
3399                 return 1;
3400
3401         pctx->num = root->indirect_levels;
3402         /* if htree level is clearly too high, consider it to be broken */
3403         if (root->indirect_levels > EXT4_HTREE_LEVEL &&
3404             fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
3405                 return 1;
3406
3407         /* if level is only maybe too high, LARGE_DIR feature could be unset */
3408         if (root->indirect_levels > ext2_dir_htree_level(fs) &&
3409             !ext2fs_has_feature_largedir(fs->super)) {
3410                 int blockbits = EXT2_BLOCK_SIZE_BITS(fs->super) + 10;
3411                 int idx_pb = 1 << (blockbits - 3);
3412
3413                 /* compare inode size/blocks vs. max-sized 2-level htree */
3414                 if (EXT2_I_SIZE(pctx->inode) <
3415                     (idx_pb - 1) * (idx_pb - 2) << blockbits &&
3416                     pctx->inode->i_blocks <
3417                     (idx_pb - 1) * (idx_pb - 2) << (blockbits - 9) &&
3418                     fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
3419                         return 1;
3420         }
3421
3422         if (root->indirect_levels > EXT4_HTREE_LEVEL_COMPAT ||
3423             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
3424                 ctx->large_dirs++;
3425
3426         return 0;
3427 }
3428
3429 void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino,
3430                         struct ext2_inode *inode, int restart_flag,
3431                         const char *source)
3432 {
3433         inode->i_flags = 0;
3434         inode->i_links_count = 0;
3435         ext2fs_icount_store(ctx->inode_link_info, ino, 0);
3436         inode->i_dtime = ctx->now;
3437
3438         /*
3439          * If a special inode has such rotten block mappings that we
3440          * want to clear the whole inode, be sure to actually zap
3441          * the block maps because i_links_count isn't checked for
3442          * special inodes, and we'll end up right back here the next
3443          * time we run fsck.
3444          */
3445         if (ino < EXT2_FIRST_INODE(ctx->fs->super))
3446                 memset(inode->i_block, 0, sizeof(inode->i_block));
3447
3448         ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
3449         ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
3450         if (ctx->inode_reg_map)
3451                 ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
3452         if (ctx->inode_bad_map)
3453                 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
3454
3455         /*
3456          * If the inode was partially accounted for before processing
3457          * was aborted, we need to restart the pass 1 scan.
3458          */
3459         ctx->flags |= restart_flag;
3460
3461         if (ino == EXT2_BAD_INO)
3462                 memset(inode, 0, sizeof(struct ext2_inode));
3463
3464         e2fsck_write_inode(ctx, ino, inode, source);
3465 }
3466
3467 /*
3468  * Use the multiple-blocks reclamation code to fix alignment problems in
3469  * a bigalloc filesystem.  We want a logical cluster to map to *only* one
3470  * physical cluster, and we want the block offsets within that cluster to
3471  * line up.
3472  */
3473 static int has_unaligned_cluster_map(e2fsck_t ctx,
3474                                      blk64_t last_pblk, blk64_t last_lblk,
3475                                      blk64_t pblk, blk64_t lblk)
3476 {
3477         blk64_t cluster_mask;
3478
3479         if (!ctx->fs->cluster_ratio_bits)
3480                 return 0;
3481         cluster_mask = EXT2FS_CLUSTER_MASK(ctx->fs);
3482
3483         /*
3484          * If the block in the logical cluster doesn't align with the block in
3485          * the physical cluster...
3486          */
3487         if ((lblk & cluster_mask) != (pblk & cluster_mask))
3488                 return 1;
3489
3490         /*
3491          * If we cross a physical cluster boundary within a logical cluster...
3492          */
3493         if (last_pblk && (lblk & cluster_mask) != 0 &&
3494             EXT2FS_B2C(ctx->fs, lblk) == EXT2FS_B2C(ctx->fs, last_lblk) &&
3495             EXT2FS_B2C(ctx->fs, pblk) != EXT2FS_B2C(ctx->fs, last_pblk))
3496                 return 1;
3497
3498         return 0;
3499 }
3500
3501 static void scan_extent_node(e2fsck_t ctx, struct problem_context *pctx,
3502                              struct process_block_struct *pb,
3503                              blk64_t start_block, blk64_t end_block,
3504                              blk64_t eof_block,
3505                              ext2_extent_handle_t ehandle,
3506                              int try_repairs)
3507 {
3508         struct ext2fs_extent    extent;
3509         blk64_t                 blk, last_lblk;
3510         unsigned int            i, n;
3511         int                     is_dir, is_leaf;
3512         problem_t               problem;
3513         struct ext2_extent_info info;
3514         int                     failed_csum = 0;
3515
3516         if (pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID)
3517                 failed_csum = 1;
3518
3519         pctx->errcode = ext2fs_extent_get_info(ehandle, &info);
3520         if (pctx->errcode)
3521                 return;
3522         if (!(ctx->options & E2F_OPT_FIXES_ONLY) &&
3523             !pb->eti.force_rebuild) {
3524                 struct extent_tree_level *etl;
3525
3526                 etl = pb->eti.ext_info + info.curr_level;
3527                 etl->num_extents += info.num_entries;
3528                 etl->max_extents += info.max_entries;
3529                 /*
3530                  * Implementation wart: Splitting extent blocks when appending
3531                  * will leave the old block with one free entry.  Therefore
3532                  * unless the node is totally full, pretend that a non-root
3533                  * extent block can hold one fewer entry than it actually does,
3534                  * so that we don't repeatedly rebuild the extent tree.
3535                  */
3536                 if (info.curr_level && info.num_entries < info.max_entries)
3537                         etl->max_extents--;
3538         }
3539
3540         pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_FIRST_SIB,
3541                                           &extent);
3542         while ((pctx->errcode == 0 ||
3543                 pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID) &&
3544                info.num_entries-- > 0) {
3545                 is_leaf = extent.e_flags & EXT2_EXTENT_FLAGS_LEAF;
3546                 is_dir = LINUX_S_ISDIR(pctx->inode->i_mode);
3547                 last_lblk = extent.e_lblk + extent.e_len - 1;
3548
3549                 problem = 0;
3550                 pctx->blk = extent.e_pblk;
3551                 pctx->blk2 = extent.e_lblk;
3552                 pctx->num = extent.e_len;
3553                 pctx->blkcount = extent.e_lblk + extent.e_len;
3554
3555                 if (extent.e_pblk == 0 ||
3556                     extent.e_pblk < ctx->fs->super->s_first_data_block ||
3557                     extent.e_pblk >= ext2fs_blocks_count(ctx->fs->super))
3558                         problem = PR_1_EXTENT_BAD_START_BLK;
3559                 else if (extent.e_lblk < start_block)
3560                         problem = PR_1_OUT_OF_ORDER_EXTENTS;
3561                 else if ((end_block && last_lblk > end_block) &&
3562                          !(last_lblk > eof_block &&
3563                            ((extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) ||
3564                             (pctx->inode->i_flags & EXT4_VERITY_FL))))
3565                         problem = PR_1_EXTENT_END_OUT_OF_BOUNDS;
3566                 else if (is_leaf && extent.e_len == 0)
3567                         problem = PR_1_EXTENT_LENGTH_ZERO;
3568                 else if (is_leaf &&
3569                          (extent.e_pblk + extent.e_len) >
3570                          ext2fs_blocks_count(ctx->fs->super))
3571                         problem = PR_1_EXTENT_ENDS_BEYOND;
3572                 else if (is_leaf && is_dir && !pctx->inode->i_size_high &&
3573                          !ext2fs_has_feature_largedir(ctx->fs->super) &&
3574                          ((extent.e_lblk + extent.e_len) >
3575                           (1U << (21 - ctx->fs->super->s_log_block_size))))
3576                         problem = PR_1_TOOBIG_DIR;
3577
3578                 if (is_leaf && problem == 0 && extent.e_len > 0) {
3579 #if 0
3580                         printf("extent_region(ino=%u, expect=%llu, "
3581                                "lblk=%llu, len=%u)\n", pb->ino,
3582                                (unsigned long long) pb->next_lblock,
3583                                (unsigned long long) extent.e_lblk,
3584                                extent.e_len);
3585 #endif
3586                         if (extent.e_lblk < pb->next_lblock)
3587                                 problem = PR_1_EXTENT_COLLISION;
3588                         else if (extent.e_lblk + extent.e_len > pb->next_lblock)
3589                                 pb->next_lblock = extent.e_lblk + extent.e_len;
3590                 }
3591
3592                 /*
3593                  * Uninitialized blocks in a directory?  Clear the flag and
3594                  * we'll interpret the blocks later.
3595                  */
3596                 if (try_repairs && is_dir && problem == 0 &&
3597                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
3598                     fix_problem(ctx, PR_1_UNINIT_DBLOCK, pctx)) {
3599                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
3600                         pb->inode_modified = 1;
3601                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
3602                                                               &extent);
3603                         if (pctx->errcode)
3604                                 return;
3605                         failed_csum = 0;
3606                 }
3607 #ifdef CONFIG_DEVELOPER_FEATURES
3608                 if (try_repairs && !is_dir && problem == 0 &&
3609                     (ctx->options & E2F_OPT_CLEAR_UNINIT) &&
3610                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
3611                     fix_problem(ctx, PR_1_CLEAR_UNINIT_EXTENT, pctx)) {
3612                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
3613                         pb->inode_modified = 1;
3614                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
3615                                                               &extent);
3616                         if (pctx->errcode)
3617                                 return;
3618                         failed_csum = 0;
3619                 }
3620 #endif
3621                 if (try_repairs && problem) {
3622 report_problem:
3623                         if (fix_problem(ctx, problem, pctx)) {
3624                                 if (ctx->invalid_bitmaps) {
3625                                         /*
3626                                          * If fsck knows the bitmaps are bad,
3627                                          * skip to the next extent and
3628                                          * try to clear this extent again
3629                                          * after fixing the bitmaps, by
3630                                          * restarting fsck.
3631                                          */
3632                                         pctx->errcode = ext2fs_extent_get(
3633                                                           ehandle,
3634                                                           EXT2_EXTENT_NEXT_SIB,
3635                                                           &extent);
3636                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3637                                         if (pctx->errcode ==
3638                                                     EXT2_ET_NO_CURRENT_NODE) {
3639                                                 pctx->errcode = 0;
3640                                                 break;
3641                                         }
3642                                         continue;
3643                                 }
3644                                 e2fsck_read_bitmaps(ctx);
3645                                 pb->inode_modified = 1;
3646                                 pctx->errcode =
3647                                         ext2fs_extent_delete(ehandle, 0);
3648                                 if (pctx->errcode) {
3649                                         pctx->str = "ext2fs_extent_delete";
3650                                         return;
3651                                 }
3652                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3653                                 if (pctx->errcode &&
3654                                     pctx->errcode != EXT2_ET_NO_CURRENT_NODE) {
3655                                         pctx->str = "ext2fs_extent_fix_parents";
3656                                         return;
3657                                 }
3658                                 pctx->errcode = ext2fs_extent_get(ehandle,
3659                                                                   EXT2_EXTENT_CURRENT,
3660                                                                   &extent);
3661                                 if (pctx->errcode == EXT2_ET_NO_CURRENT_NODE) {
3662                                         pctx->errcode = 0;
3663                                         break;
3664                                 }
3665                                 failed_csum = 0;
3666                                 continue;
3667                         }
3668                         goto next;
3669                 }
3670
3671                 if (!is_leaf) {
3672                         blk64_t lblk = extent.e_lblk;
3673                         int next_try_repairs = 1;
3674
3675                         blk = extent.e_pblk;
3676
3677                         /*
3678                          * If this lower extent block collides with critical
3679                          * metadata, don't try to repair the damage.  Pass 1b
3680                          * will reallocate the block; then we can try again.
3681                          */
3682                         if (pb->ino != EXT2_RESIZE_INO &&
3683                             extent.e_pblk < ctx->fs->super->s_blocks_count &&
3684                             ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3685                                                       extent.e_pblk)) {
3686                                 next_try_repairs = 0;
3687                                 pctx->blk = blk;
3688                                 fix_problem(ctx,
3689                                             PR_1_CRITICAL_METADATA_COLLISION,
3690                                             pctx);
3691                                 if ((ctx->options & E2F_OPT_NO) == 0)
3692                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3693                         }
3694                         pctx->errcode = ext2fs_extent_get(ehandle,
3695                                                   EXT2_EXTENT_DOWN, &extent);
3696                         if (pctx->errcode &&
3697                             pctx->errcode != EXT2_ET_EXTENT_CSUM_INVALID) {
3698                                 pctx->str = "EXT2_EXTENT_DOWN";
3699                                 problem = PR_1_EXTENT_HEADER_INVALID;
3700                                 if (!next_try_repairs)
3701                                         return;
3702                                 if (pctx->errcode == EXT2_ET_EXTENT_HEADER_BAD)
3703                                         goto report_problem;
3704                                 return;
3705                         }
3706                         /* The next extent should match this index's logical start */
3707                         if (extent.e_lblk != lblk) {
3708                                 struct ext2_extent_info e_info;
3709
3710                                 pctx->errcode = ext2fs_extent_get_info(ehandle,
3711                                                                        &e_info);
3712                                 if (pctx->errcode) {
3713                                         pctx->str = "ext2fs_extent_get_info";
3714                                         return;
3715                                 }
3716                                 pctx->blk = lblk;
3717                                 pctx->blk2 = extent.e_lblk;
3718                                 pctx->num = e_info.curr_level - 1;
3719                                 problem = PR_1_EXTENT_INDEX_START_INVALID;
3720                                 if (fix_problem(ctx, problem, pctx)) {
3721                                         pb->inode_modified = 1;
3722                                         pctx->errcode =
3723                                                 ext2fs_extent_fix_parents(ehandle);
3724                                         if (pctx->errcode) {
3725                                                 pctx->str = "ext2fs_extent_fix_parents";
3726                                                 return;
3727                                         }
3728                                 }
3729                         }
3730                         scan_extent_node(ctx, pctx, pb, extent.e_lblk,
3731                                          last_lblk, eof_block, ehandle,
3732                                          next_try_repairs);
3733                         if (pctx->errcode)
3734                                 return;
3735                         pctx->errcode = ext2fs_extent_get(ehandle,
3736                                                   EXT2_EXTENT_UP, &extent);
3737                         if (pctx->errcode) {
3738                                 pctx->str = "EXT2_EXTENT_UP";
3739                                 return;
3740                         }
3741                         mark_block_used(ctx, blk);
3742                         pb->num_blocks++;
3743                         goto next;
3744                 }
3745
3746                 if ((pb->previous_block != 0) &&
3747                     (pb->previous_block+1 != extent.e_pblk)) {
3748                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3749                                 char type = '?';
3750
3751                                 if (pb->is_dir)
3752                                         type = 'd';
3753                                 else if (pb->is_reg)
3754                                         type = 'f';
3755
3756                                 printf(("%6lu(%c): expecting %6lu "
3757                                         "actual extent "
3758                                         "phys %6lu log %lu len %lu\n"),
3759                                        (unsigned long) pctx->ino, type,
3760                                        (unsigned long) pb->previous_block+1,
3761                                        (unsigned long) extent.e_pblk,
3762                                        (unsigned long) extent.e_lblk,
3763                                        (unsigned long) extent.e_len);
3764                         }
3765                         pb->fragmented = 1;
3766                 }
3767                 /*
3768                  * If we notice a gap in the logical block mappings of an
3769                  * extent-mapped directory, offer to close the hole by
3770                  * moving the logical block down, otherwise we'll go mad in
3771                  * pass 3 allocating empty directory blocks to fill the hole.
3772                  */
3773                 if (try_repairs && is_dir &&
3774                     pb->last_block + 1 < extent.e_lblk) {
3775                         blk64_t new_lblk;
3776
3777                         new_lblk = pb->last_block + 1;
3778                         if (EXT2FS_CLUSTER_RATIO(ctx->fs) > 1)
3779                                 new_lblk = ((new_lblk +
3780                                              EXT2FS_CLUSTER_RATIO(ctx->fs) - 1) &
3781                                             ~EXT2FS_CLUSTER_MASK(ctx->fs)) |
3782                                            (extent.e_pblk &
3783                                             EXT2FS_CLUSTER_MASK(ctx->fs));
3784                         pctx->blk = extent.e_lblk;
3785                         pctx->blk2 = new_lblk;
3786                         if (fix_problem(ctx, PR_1_COLLAPSE_DBLOCK, pctx)) {
3787                                 extent.e_lblk = new_lblk;
3788                                 pb->inode_modified = 1;
3789                                 pctx->errcode = ext2fs_extent_replace(ehandle,
3790                                                                 0, &extent);
3791                                 if (pctx->errcode) {
3792                                         pctx->errcode = 0;
3793                                         goto alloc_later;
3794                                 }
3795                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3796                                 if (pctx->errcode)
3797                                         goto failed_add_dir_block;
3798                                 pctx->errcode = ext2fs_extent_goto(ehandle,
3799                                                                 extent.e_lblk);
3800                                 if (pctx->errcode)
3801                                         goto failed_add_dir_block;
3802                                 last_lblk = extent.e_lblk + extent.e_len - 1;
3803                                 failed_csum = 0;
3804                         }
3805                 }
3806 alloc_later:
3807                 if (is_dir) {
3808                         while (++pb->last_db_block <
3809                                (e2_blkcnt_t) extent.e_lblk) {
3810                                 pctx->errcode = ext2fs_add_dir_block2(
3811                                                         ctx->fs->dblist,
3812                                                         pb->ino, 0,
3813                                                         pb->last_db_block);
3814                                 if (pctx->errcode) {
3815                                         pctx->blk = 0;
3816                                         pctx->num = pb->last_db_block;
3817                                         goto failed_add_dir_block;
3818                                 }
3819                         }
3820
3821                         for (i = 0; i < extent.e_len; i++) {
3822                                 pctx->errcode = ext2fs_add_dir_block2(
3823                                                         ctx->fs->dblist,
3824                                                         pctx->ino,
3825                                                         extent.e_pblk + i,
3826                                                         extent.e_lblk + i);
3827                                 if (pctx->errcode) {
3828                                         pctx->blk = extent.e_pblk + i;
3829                                         pctx->num = extent.e_lblk + i;
3830                                 failed_add_dir_block:
3831                                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3832                                         /* Should never get here */
3833                                         ctx->flags |= E2F_FLAG_ABORT;
3834                                         return;
3835                                 }
3836                         }
3837                         if (extent.e_len > 0)
3838                                 pb->last_db_block = extent.e_lblk + extent.e_len - 1;
3839                 }
3840                 if (has_unaligned_cluster_map(ctx, pb->previous_block,
3841                                               pb->last_block,
3842                                               extent.e_pblk,
3843                                               extent.e_lblk)) {
3844                         for (i = 0; i < extent.e_len; i++) {
3845                                 pctx->blk = extent.e_lblk + i;
3846                                 pctx->blk2 = extent.e_pblk + i;
3847                                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3848                                 mark_block_used(ctx, extent.e_pblk + i);
3849                                 mark_block_used(ctx, extent.e_pblk + i);
3850                         }
3851                 }
3852
3853                 /*
3854                  * Check whether first cluster got marked in previous iteration.
3855                  */
3856                 if (ctx->fs->cluster_ratio_bits &&
3857                     pb->previous_block &&
3858                     (EXT2FS_B2C(ctx->fs, extent.e_pblk) ==
3859                      EXT2FS_B2C(ctx->fs, pb->previous_block)))
3860                         /* Set blk to the beginning of next cluster. */
3861                         blk = EXT2FS_C2B(
3862                                 ctx->fs,
3863                                 EXT2FS_B2C(ctx->fs, extent.e_pblk) + 1);
3864                 else
3865                         /* Set blk to the beginning of current cluster. */
3866                         blk = EXT2FS_C2B(ctx->fs,
3867                                          EXT2FS_B2C(ctx->fs, extent.e_pblk));
3868
3869                 if (blk < extent.e_pblk + extent.e_len) {
3870                         mark_blocks_used(ctx, blk,
3871                                          extent.e_pblk + extent.e_len - blk);
3872                         n = DIV_ROUND_UP(extent.e_pblk + extent.e_len - blk,
3873                                          EXT2FS_CLUSTER_RATIO(ctx->fs));
3874                         pb->num_blocks += n;
3875                 }
3876                 pb->last_block = extent.e_lblk + extent.e_len - 1;
3877                 pb->previous_block = extent.e_pblk + extent.e_len - 1;
3878                 start_block = pb->last_block = last_lblk;
3879                 if (is_leaf && !is_dir &&
3880                     !(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT))
3881                         pb->last_init_lblock = last_lblk;
3882         next:
3883                 pctx->errcode = ext2fs_extent_get(ehandle,
3884                                                   EXT2_EXTENT_NEXT_SIB,
3885                                                   &extent);
3886         }
3887
3888         /* Failed csum but passes checks?  Ask to fix checksum. */
3889         if (failed_csum &&
3890             fix_problem(ctx, PR_1_EXTENT_ONLY_CSUM_INVALID, pctx)) {
3891                 pb->inode_modified = 1;
3892                 pctx->errcode = ext2fs_extent_replace(ehandle, 0, &extent);
3893                 if (pctx->errcode)
3894                         return;
3895         }
3896
3897         if (pctx->errcode == EXT2_ET_EXTENT_NO_NEXT)
3898                 pctx->errcode = 0;
3899 }
3900
3901 static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx,
3902                                  struct process_block_struct *pb)
3903 {
3904         struct ext2_extent_info info;
3905         struct ext2_inode       *inode = pctx->inode;
3906         ext2_extent_handle_t    ehandle;
3907         ext2_filsys             fs = ctx->fs;
3908         ext2_ino_t              ino = pctx->ino;
3909         errcode_t               retval;
3910         blk64_t                 eof_lblk;
3911         struct ext3_extent_header       *eh;
3912
3913         /* Check for a proper extent header... */
3914         eh = (struct ext3_extent_header *) &inode->i_block[0];
3915         retval = ext2fs_extent_header_verify(eh, sizeof(inode->i_block));
3916         if (retval) {
3917                 if (fix_problem(ctx, PR_1_MISSING_EXTENT_HEADER, pctx))
3918                         e2fsck_clear_inode(ctx, ino, inode, 0,
3919                                            "check_blocks_extents");
3920                 pctx->errcode = 0;
3921                 return;
3922         }
3923
3924         /* ...since this function doesn't fail if i_block is zeroed. */
3925         pctx->errcode = ext2fs_extent_open2(fs, ino, inode, &ehandle);
3926         if (pctx->errcode) {
3927                 if (fix_problem(ctx, PR_1_READ_EXTENT, pctx))
3928                         e2fsck_clear_inode(ctx, ino, inode, 0,
3929                                            "check_blocks_extents");
3930                 pctx->errcode = 0;
3931                 return;
3932         }
3933
3934         retval = ext2fs_extent_get_info(ehandle, &info);
3935         if (retval == 0) {
3936                 int max_depth = info.max_depth;
3937
3938                 if (max_depth >= MAX_EXTENT_DEPTH_COUNT)
3939                         max_depth = MAX_EXTENT_DEPTH_COUNT-1;
3940                 ctx->extent_depth_count[max_depth]++;
3941         }
3942
3943         /* Check maximum extent depth */
3944         pctx->blk = info.max_depth;
3945         pctx->blk2 = ext2fs_max_extent_depth(ehandle);
3946         if (pctx->blk2 < pctx->blk &&
3947             fix_problem(ctx, PR_1_EXTENT_BAD_MAX_DEPTH, pctx))
3948                 pb->eti.force_rebuild = 1;
3949
3950         /* Can we collect extent tree level stats? */
3951         pctx->blk = MAX_EXTENT_DEPTH_COUNT;
3952         if (pctx->blk2 > pctx->blk)
3953                 fix_problem(ctx, PR_1E_MAX_EXTENT_TREE_DEPTH, pctx);
3954         memset(pb->eti.ext_info, 0, sizeof(pb->eti.ext_info));
3955         pb->eti.ino = pb->ino;
3956
3957         pb->next_lblock = 0;
3958
3959         eof_lblk = ((EXT2_I_SIZE(inode) + fs->blocksize - 1) >>
3960                 EXT2_BLOCK_SIZE_BITS(fs->super)) - 1;
3961         scan_extent_node(ctx, pctx, pb, 0, 0, eof_lblk, ehandle, 1);
3962         if (pctx->errcode &&
3963             fix_problem(ctx, PR_1_EXTENT_ITERATE_FAILURE, pctx)) {
3964                 pb->num_blocks = 0;
3965                 inode->i_blocks = 0;
3966                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3967                                    "check_blocks_extents");
3968                 pctx->errcode = 0;
3969         }
3970         ext2fs_extent_free(ehandle);
3971
3972         /* Rebuild unless it's a dir and we're rehashing it */
3973         if (LINUX_S_ISDIR(inode->i_mode) &&
3974             e2fsck_dir_will_be_rehashed(ctx, ino))
3975                 return;
3976
3977         if (ctx->options & E2F_OPT_CONVERT_BMAP)
3978                 e2fsck_rebuild_extents_later(ctx, ino);
3979         else
3980                 e2fsck_should_rebuild_extents(ctx, pctx, &pb->eti, &info);
3981 }
3982
3983 /*
3984  * In fact we don't need to check blocks for an inode with inline data
3985  * because this inode doesn't have any blocks.  In this function all
3986  * we need to do is add this inode into dblist when it is a directory.
3987  */
3988 static void check_blocks_inline_data(e2fsck_t ctx, struct problem_context *pctx,
3989                                      struct process_block_struct *pb)
3990 {
3991         int     flags;
3992         size_t  inline_data_size = 0;
3993
3994         if (!pb->is_dir) {
3995                 pctx->errcode = 0;
3996                 return;
3997         }
3998
3999         /* Process the dirents in i_block[] as the "first" block. */
4000         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 0);
4001         if (pctx->errcode)
4002                 goto err;
4003
4004         /* Process the dirents in the EA as a "second" block. */
4005         flags = ctx->fs->flags;
4006         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
4007         pctx->errcode = ext2fs_inline_data_size(ctx->fs, pb->ino,
4008                                                 &inline_data_size);
4009         ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
4010                          (ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
4011         if (pctx->errcode) {
4012                 pctx->errcode = 0;
4013                 return;
4014         }
4015
4016         if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE)
4017                 return;
4018
4019         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 1);
4020         if (pctx->errcode)
4021                 goto err;
4022
4023         return;
4024 err:
4025         pctx->blk = 0;
4026         pctx->num = 0;
4027         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
4028         ctx->flags |= E2F_FLAG_ABORT;
4029 }
4030
4031 /*
4032  * This subroutine is called on each inode to account for all of the
4033  * blocks used by that inode.
4034  */
4035 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
4036                          char *block_buf, const struct ea_quota *ea_ibody_quota)
4037 {
4038         ext2_filsys fs = ctx->fs;
4039         struct process_block_struct pb;
4040         ext2_ino_t      ino = pctx->ino;
4041         struct ext2_inode *inode = pctx->inode;
4042         unsigned        bad_size = 0;
4043         int             dirty_inode = 0;
4044         int             extent_fs;
4045         int             inlinedata_fs;
4046         __u64           size;
4047         struct ea_quota ea_block_quota;
4048
4049         pb.ino = ino;
4050         pb.num_blocks = EXT2FS_B2C(ctx->fs,
4051                                    ea_ibody_quota ? ea_ibody_quota->blocks : 0);
4052         pb.last_block = ~0;
4053         pb.last_init_lblock = -1;
4054         pb.last_db_block = -1;
4055         pb.num_illegal_blocks = 0;
4056         pb.suppress = 0; pb.clear = 0;
4057         pb.fragmented = 0;
4058         pb.compressed = 0;
4059         pb.previous_block = 0;
4060         pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
4061         pb.is_reg = LINUX_S_ISREG(inode->i_mode);
4062         pb.max_blocks = 1U << (31 - fs->super->s_log_block_size);
4063         pb.inode = inode;
4064         pb.pctx = pctx;
4065         pb.ctx = ctx;
4066         pb.inode_modified = 0;
4067         pb.eti.force_rebuild = 0;
4068         pctx->ino = ino;
4069         pctx->errcode = 0;
4070
4071         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
4072         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
4073
4074         if (check_ext_attr(ctx, pctx, block_buf, &ea_block_quota)) {
4075                 if (e2fsck_should_abort(ctx))
4076                         goto out;
4077                 pb.num_blocks += EXT2FS_B2C(ctx->fs, ea_block_quota.blocks);
4078         }
4079
4080         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL))
4081                 check_blocks_inline_data(ctx, pctx, &pb);
4082         else if (ext2fs_inode_has_valid_blocks2(fs, inode)) {
4083                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL))
4084                         check_blocks_extents(ctx, pctx, &pb);
4085                 else {
4086                         int flags;
4087                         /*
4088                          * If we've modified the inode, write it out before
4089                          * iterate() tries to use it.
4090                          */
4091                         if (dirty_inode) {
4092                                 e2fsck_write_inode(ctx, ino, inode,
4093                                                    "check_blocks");
4094                                 dirty_inode = 0;
4095                         }
4096                         flags = fs->flags;
4097                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
4098                         pctx->errcode = ext2fs_block_iterate3(fs, ino,
4099                                                 pb.is_dir ? BLOCK_FLAG_HOLE : 0,
4100                                                 block_buf, process_block, &pb);
4101                         /*
4102                          * We do not have uninitialized extents in non extent
4103                          * files.
4104                          */
4105                         pb.last_init_lblock = pb.last_block;
4106                         /*
4107                          * If iterate() changed a block mapping, we have to
4108                          * re-read the inode.  If we decide to clear the
4109                          * inode after clearing some stuff, we'll re-write the
4110                          * bad mappings into the inode!
4111                          */
4112                         if (pb.inode_modified)
4113                                 e2fsck_read_inode(ctx, ino, inode,
4114                                                   "check_blocks");
4115                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
4116                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
4117
4118                         if (ctx->options & E2F_OPT_CONVERT_BMAP) {
4119 #ifdef DEBUG
4120                                 printf("bmap rebuild ino=%d\n", ino);
4121 #endif
4122                                 if (!LINUX_S_ISDIR(inode->i_mode) ||
4123                                     !e2fsck_dir_will_be_rehashed(ctx, ino))
4124                                         e2fsck_rebuild_extents_later(ctx, ino);
4125                         }
4126                 }
4127         }
4128         end_problem_latch(ctx, PR_LATCH_BLOCK);
4129         end_problem_latch(ctx, PR_LATCH_TOOBIG);
4130         if (e2fsck_should_abort(ctx))
4131                 goto out;
4132         if (pctx->errcode)
4133                 fix_problem(ctx, PR_1_BLOCK_ITERATE, pctx);
4134
4135         if (pb.fragmented && pb.num_blocks < fs->super->s_blocks_per_group) {
4136                 if (LINUX_S_ISDIR(inode->i_mode))
4137                         ctx->fs_fragmented_dir++;
4138                 else
4139                         ctx->fs_fragmented++;
4140         }
4141
4142         if (pb.clear) {
4143                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
4144                                    "check_blocks");
4145                 return;
4146         }
4147
4148         if (inode->i_flags & EXT2_INDEX_FL) {
4149                 if (handle_htree(ctx, pctx, ino, inode, block_buf)) {
4150                         inode->i_flags &= ~EXT2_INDEX_FL;
4151                         dirty_inode++;
4152                 } else {
4153                         e2fsck_add_dx_dir(ctx, ino, inode, pb.last_block+1);
4154                 }
4155         }
4156
4157         if (!pb.num_blocks && pb.is_dir &&
4158             !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
4159                 if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) {
4160                         e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks");
4161                         ctx->fs_directory_count--;
4162                         return;
4163                 }
4164         }
4165
4166         if (ino != quota_type2inum(PRJQUOTA, fs->super) &&
4167             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super)) &&
4168             !(inode->i_flags & EXT4_EA_INODE_FL)) {
4169                 quota_data_add(ctx->qctx, (struct ext2_inode_large *) inode,
4170                                ino,
4171                                pb.num_blocks * EXT2_CLUSTER_SIZE(fs->super));
4172                 quota_data_inodes(ctx->qctx, (struct ext2_inode_large *) inode,
4173                                   ino, (ea_ibody_quota ?
4174                                         ea_ibody_quota->inodes : 0) +
4175                                                 ea_block_quota.inodes + 1);
4176         }
4177
4178         if (!ext2fs_has_feature_huge_file(fs->super) ||
4179             !(inode->i_flags & EXT4_HUGE_FILE_FL))
4180                 pb.num_blocks *= (fs->blocksize / 512);
4181         pb.num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
4182 #if 0
4183         printf("inode %u, i_size = %u, last_block = %llu, i_blocks=%llu, num_blocks = %llu\n",
4184                ino, inode->i_size, (unsigned long long) pb.last_block,
4185                (unsigned long long) ext2fs_inode_i_blocks(fs, inode),
4186                (unsigned long long) pb.num_blocks);
4187 #endif
4188         size = EXT2_I_SIZE(inode);
4189         if (pb.is_dir) {
4190                 unsigned nblock = size >> EXT2_BLOCK_SIZE_BITS(fs->super);
4191                 if (inode->i_flags & EXT4_INLINE_DATA_FL) {
4192                         int flags;
4193                         size_t sz = 0;
4194                         errcode_t err;
4195
4196                         flags = ctx->fs->flags;
4197                         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
4198                         err = ext2fs_inline_data_size(ctx->fs, pctx->ino,
4199                                                       &sz);
4200                         ctx->fs->flags = (flags &
4201                                           EXT2_FLAG_IGNORE_CSUM_ERRORS) |
4202                                          (ctx->fs->flags &
4203                                           ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
4204                         if (err || sz != size) {
4205                                 bad_size = 7;
4206                                 pctx->num = sz;
4207                         }
4208                 } else if (size & (fs->blocksize - 1))
4209                         bad_size = 5;
4210                 else if (nblock > (pb.last_block + 1))
4211                         bad_size = 1;
4212                 else if (nblock < (pb.last_block + 1)) {
4213                         if (((pb.last_block + 1) - nblock) >
4214                             fs->super->s_prealloc_dir_blocks)
4215                                 bad_size = 2;
4216                 }
4217         } else {
4218                 if ((pb.last_init_lblock >= 0) &&
4219                     /* Do not allow initialized allocated blocks past i_size*/
4220                     (size < (__u64)pb.last_init_lblock * fs->blocksize) &&
4221                     !(inode->i_flags & EXT4_VERITY_FL))
4222                         bad_size = 3;
4223                 else if (!(extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
4224                          size > ext2_max_sizes[fs->super->s_log_block_size])
4225                         /* too big for a direct/indirect-mapped file */
4226                         bad_size = 4;
4227                 else if ((extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
4228                          size >
4229                          ((1ULL << (32 + EXT2_BLOCK_SIZE_BITS(fs->super))) - 1))
4230                         /* too big for an extent-based file - 32bit ee_block */
4231                         bad_size = 6;
4232         }
4233         /* i_size for symlinks is checked elsewhere */
4234         if (bad_size && !LINUX_S_ISLNK(inode->i_mode)) {
4235                 /* Did inline_data set pctx->num earlier? */
4236                 if (bad_size != 7)
4237                         pctx->num = (pb.last_block + 1) * fs->blocksize;
4238                 pctx->group = bad_size;
4239                 if (fix_problem(ctx, PR_1_BAD_I_SIZE, pctx)) {
4240                         ext2fs_inode_size_set(fs, inode, pctx->num);
4241                         if (EXT2_I_SIZE(inode) == 0 &&
4242                             (inode->i_flags & EXT4_INLINE_DATA_FL)) {
4243                                 memset(inode->i_block, 0,
4244                                        sizeof(inode->i_block));
4245                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
4246                         }
4247                         dirty_inode++;
4248                 }
4249                 pctx->num = 0;
4250         }
4251         if (LINUX_S_ISREG(inode->i_mode) &&
4252             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
4253                 ctx->large_files++;
4254         if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
4255             ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) ||
4256              (ext2fs_has_feature_huge_file(fs->super) &&
4257               (inode->i_flags & EXT4_HUGE_FILE_FL) &&
4258               (inode->osd2.linux2.l_i_blocks_hi != 0)))) {
4259                 pctx->num = pb.num_blocks;
4260                 if (fix_problem(ctx, PR_1_BAD_I_BLOCKS, pctx)) {
4261                         inode->i_blocks = pb.num_blocks;
4262                         inode->osd2.linux2.l_i_blocks_hi = pb.num_blocks >> 32;
4263                         dirty_inode++;
4264                 }
4265                 pctx->num = 0;
4266         }
4267
4268         /*
4269          * The kernel gets mad if we ask it to allocate bigalloc clusters to
4270          * a block mapped file, so rebuild it as an extent file.  We can skip
4271          * symlinks because they're never rewritten.
4272          */
4273         if (ext2fs_has_feature_bigalloc(fs->super) &&
4274             (LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode)) &&
4275             ext2fs_inode_data_blocks2(fs, inode) > 0 &&
4276             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INO(fs->super)) &&
4277             !(inode->i_flags & (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)) &&
4278             fix_problem(ctx, PR_1_NO_BIGALLOC_BLOCKMAP_FILES, pctx)) {
4279                 pctx->errcode = e2fsck_rebuild_extents_later(ctx, ino);
4280                 if (pctx->errcode)
4281                         goto out;
4282         }
4283
4284         if (ctx->dirs_to_hash && pb.is_dir &&
4285             !(ctx->lost_and_found && ctx->lost_and_found == ino) &&
4286             !(inode->i_flags & EXT2_INDEX_FL) &&
4287             ((inode->i_size / fs->blocksize) >= 3))
4288                 e2fsck_rehash_dir_later(ctx, ino);
4289
4290 out:
4291         if (dirty_inode)
4292                 e2fsck_write_inode(ctx, ino, inode, "check_blocks");
4293 }
4294
4295 #if 0
4296 /*
4297  * Helper function called by process block when an illegal block is
4298  * found.  It returns a description about why the block is illegal
4299  */
4300 static char *describe_illegal_block(ext2_filsys fs, blk64_t block)
4301 {
4302         blk64_t super;
4303         int     i;
4304         static char     problem[80];
4305
4306         super = fs->super->s_first_data_block;
4307         strcpy(problem, "PROGRAMMING ERROR: Unknown reason for illegal block");
4308         if (block < super) {
4309                 sprintf(problem, "< FIRSTBLOCK (%u)", super);
4310                 return(problem);
4311         } else if (block >= ext2fs_blocks_count(fs->super)) {
4312                 sprintf(problem, "> BLOCKS (%u)", ext2fs_blocks_count(fs->super));
4313                 return(problem);
4314         }
4315         for (i = 0; i < fs->group_desc_count; i++) {
4316                 if (block == super) {
4317                         sprintf(problem, "is the superblock in group %d", i);
4318                         break;
4319                 }
4320                 if (block > super &&
4321                     block <= (super + fs->desc_blocks)) {
4322                         sprintf(problem, "is in the group descriptors "
4323                                 "of group %d", i);
4324                         break;
4325                 }
4326                 if (block == ext2fs_block_bitmap_loc(fs, i)) {
4327                         sprintf(problem, "is the block bitmap of group %d", i);
4328                         break;
4329                 }
4330                 if (block == ext2fs_inode_bitmap_loc(fs, i)) {
4331                         sprintf(problem, "is the inode bitmap of group %d", i);
4332                         break;
4333                 }
4334                 if (block >= ext2fs_inode_table_loc(fs, i) &&
4335                     (block < ext2fs_inode_table_loc(fs, i)
4336                      + fs->inode_blocks_per_group)) {
4337                         sprintf(problem, "is in the inode table of group %d",
4338                                 i);
4339                         break;
4340                 }
4341                 super += fs->super->s_blocks_per_group;
4342         }
4343         return(problem);
4344 }
4345 #endif
4346
4347 /*
4348  * This is a helper function for check_blocks().
4349  */
4350 static int process_block(ext2_filsys fs,
4351                   blk64_t       *block_nr,
4352                   e2_blkcnt_t blockcnt,
4353                   blk64_t ref_block EXT2FS_ATTR((unused)),
4354                   int ref_offset EXT2FS_ATTR((unused)),
4355                   void *priv_data)
4356 {
4357         struct process_block_struct *p;
4358         struct problem_context *pctx;
4359         blk64_t blk = *block_nr;
4360         int     ret_code = 0;
4361         problem_t       problem = 0;
4362         e2fsck_t        ctx;
4363
4364         p = (struct process_block_struct *) priv_data;
4365         pctx = p->pctx;
4366         ctx = p->ctx;
4367
4368         /*
4369          * For a directory, add logical block zero for processing even if it's
4370          * not mapped or we'll be perennially stuck with broken "." and ".."
4371          * entries.
4372          */
4373         if (p->is_dir && blockcnt == 0 && blk == 0) {
4374                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino, 0, 0);
4375                 if (pctx->errcode) {
4376                         pctx->blk = blk;
4377                         pctx->num = blockcnt;
4378                         goto failed_add_dir_block;
4379                 }
4380                 p->last_db_block++;
4381         }
4382
4383         if (blk == 0)
4384                 return 0;
4385
4386 #if 0
4387         printf("Process_block, inode %lu, block %u, #%d\n", p->ino, blk,
4388                blockcnt);
4389 #endif
4390
4391         /*
4392          * Simplistic fragmentation check.  We merely require that the
4393          * file be contiguous.  (Which can never be true for really
4394          * big files that are greater than a block group.)
4395          */
4396         if (p->previous_block && p->ino != EXT2_RESIZE_INO) {
4397                 if (p->previous_block+1 != blk) {
4398                         if (ctx->options & E2F_OPT_FRAGCHECK) {
4399                                 char type = '?';
4400
4401                                 if (p->is_dir)
4402                                         type = 'd';
4403                                 else if (p->is_reg)
4404                                         type = 'f';
4405
4406                                 printf(_("%6lu(%c): expecting %6lu "
4407                                          "got phys %6lu (blkcnt %lld)\n"),
4408                                        (unsigned long) pctx->ino, type,
4409                                        (unsigned long) p->previous_block+1,
4410                                        (unsigned long) blk,
4411                                        (long long) blockcnt);
4412                         }
4413                         p->fragmented = 1;
4414                 }
4415         }
4416
4417         if (p->is_dir && !ext2fs_has_feature_largedir(fs->super) &&
4418             !pctx->inode->i_size_high &&
4419             blockcnt > (1 << (21 - fs->super->s_log_block_size)))
4420                 problem = PR_1_TOOBIG_DIR;
4421         if (p->is_dir && p->num_blocks + 1 >= p->max_blocks)
4422                 problem = PR_1_TOOBIG_DIR;
4423         if (p->is_reg && p->num_blocks + 1 >= p->max_blocks)
4424                 problem = PR_1_TOOBIG_REG;
4425         if (!p->is_dir && !p->is_reg && blockcnt > 0)
4426                 problem = PR_1_TOOBIG_SYMLINK;
4427
4428         if (blk < fs->super->s_first_data_block ||
4429             blk >= ext2fs_blocks_count(fs->super))
4430                 problem = PR_1_ILLEGAL_BLOCK_NUM;
4431
4432         /*
4433          * If this IND/DIND/TIND block is squatting atop some critical metadata
4434          * (group descriptors, superblock, bitmap, inode table), any write to
4435          * "fix" mapping problems will destroy the metadata.  We'll let pass 1b
4436          * fix that and restart fsck.
4437          */
4438         if (blockcnt < 0 &&
4439             p->ino != EXT2_RESIZE_INO &&
4440             blk < ctx->fs->super->s_blocks_count &&
4441             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk)) {
4442                 pctx->blk = blk;
4443                 fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx);
4444                 if ((ctx->options & E2F_OPT_NO) == 0)
4445                         ctx->flags |= E2F_FLAG_RESTART_LATER;
4446         }
4447
4448         if (problem) {
4449                 p->num_illegal_blocks++;
4450                 /*
4451                  * A bit of subterfuge here -- we're trying to fix a block
4452                  * mapping, but the IND/DIND/TIND block could have collided
4453                  * with some critical metadata.  So, fix the in-core mapping so
4454                  * iterate won't go insane, but return 0 instead of
4455                  * BLOCK_CHANGED so that it won't write the remapping out to
4456                  * our multiply linked block.
4457                  *
4458                  * Even if we previously determined that an *IND block
4459                  * conflicts with critical metadata, we must still try to
4460                  * iterate the *IND block as if it is an *IND block to find and
4461                  * mark the blocks it points to.  Better to be overly cautious
4462                  * with the used_blocks map so that we don't move the *IND
4463                  * block to a block that's really in use!
4464                  */
4465                 if (p->ino != EXT2_RESIZE_INO &&
4466                     ref_block != 0 &&
4467                     ext2fs_test_block_bitmap2(ctx->block_metadata_map,
4468                                               ref_block)) {
4469                         *block_nr = 0;
4470                         return 0;
4471                 }
4472                 if (!p->suppress && (p->num_illegal_blocks % 12) == 0) {
4473                         if (fix_problem(ctx, PR_1_TOO_MANY_BAD_BLOCKS, pctx)) {
4474                                 p->clear = 1;
4475                                 return BLOCK_ABORT;
4476                         }
4477                         if (fix_problem(ctx, PR_1_SUPPRESS_MESSAGES, pctx)) {
4478                                 p->suppress = 1;
4479                                 set_latch_flags(PR_LATCH_BLOCK,
4480                                                 PRL_SUPPRESS, 0);
4481                         }
4482                 }
4483                 pctx->blk = blk;
4484                 pctx->blkcount = blockcnt;
4485                 if (fix_problem(ctx, problem, pctx)) {
4486                         blk = *block_nr = 0;
4487                         ret_code = BLOCK_CHANGED;
4488                         p->inode_modified = 1;
4489                         /*
4490                          * If the directory block is too big and is beyond the
4491                          * end of the FS, don't bother trying to add it for
4492                          * processing -- the kernel would never have created a
4493                          * directory this large, and we risk an ENOMEM abort.
4494                          * In any case, the toobig handler for extent-based
4495                          * directories also doesn't feed toobig blocks to
4496                          * pass 2.
4497                          */
4498                         if (problem == PR_1_TOOBIG_DIR)
4499                                 return ret_code;
4500                         goto mark_dir;
4501                 } else
4502                         return 0;
4503         }
4504
4505         if (p->ino == EXT2_RESIZE_INO) {
4506                 /*
4507                  * The resize inode has already be sanity checked
4508                  * during pass #0 (the superblock checks).  All we
4509                  * have to do is mark the double indirect block as
4510                  * being in use; all of the other blocks are handled
4511                  * by mark_table_blocks()).
4512                  */
4513                 if (blockcnt == BLOCK_COUNT_DIND)
4514                         mark_block_used(ctx, blk);
4515                 p->num_blocks++;
4516         } else if (!(ctx->fs->cluster_ratio_bits &&
4517                      p->previous_block &&
4518                      (EXT2FS_B2C(ctx->fs, blk) ==
4519                       EXT2FS_B2C(ctx->fs, p->previous_block)) &&
4520                      (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
4521                      ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
4522                 mark_block_used(ctx, blk);
4523                 p->num_blocks++;
4524         } else if (has_unaligned_cluster_map(ctx, p->previous_block,
4525                                              p->last_block, blk, blockcnt)) {
4526                 pctx->blk = blockcnt;
4527                 pctx->blk2 = blk;
4528                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
4529                 mark_block_used(ctx, blk);
4530                 mark_block_used(ctx, blk);
4531         }
4532         if (blockcnt >= 0)
4533                 p->last_block = blockcnt;
4534         p->previous_block = blk;
4535 mark_dir:
4536         if (p->is_dir && (blockcnt >= 0)) {
4537                 while (++p->last_db_block < blockcnt) {
4538                         pctx->errcode = ext2fs_add_dir_block2(fs->dblist,
4539                                                               p->ino, 0,
4540                                                               p->last_db_block);
4541                         if (pctx->errcode) {
4542                                 pctx->blk = 0;
4543                                 pctx->num = p->last_db_block;
4544                                 goto failed_add_dir_block;
4545                         }
4546                 }
4547                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino,
4548                                                       blk, blockcnt);
4549                 if (pctx->errcode) {
4550                         pctx->blk = blk;
4551                         pctx->num = blockcnt;
4552                 failed_add_dir_block:
4553                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
4554                         /* Should never get here */
4555                         ctx->flags |= E2F_FLAG_ABORT;
4556                         return BLOCK_ABORT;
4557                 }
4558         }
4559         return ret_code;
4560 }
4561
4562 static int process_bad_block(ext2_filsys fs,
4563                       blk64_t *block_nr,
4564                       e2_blkcnt_t blockcnt,
4565                       blk64_t ref_block EXT2FS_ATTR((unused)),
4566                       int ref_offset EXT2FS_ATTR((unused)),
4567                       void *priv_data)
4568 {
4569         struct process_block_struct *p;
4570         blk64_t         blk = *block_nr;
4571         blk64_t         first_block;
4572         dgrp_t          i;
4573         struct problem_context *pctx;
4574         e2fsck_t        ctx;
4575
4576         if (!blk)
4577                 return 0;
4578
4579         p = (struct process_block_struct *) priv_data;
4580         ctx = p->ctx;
4581         pctx = p->pctx;
4582
4583         pctx->ino = EXT2_BAD_INO;
4584         pctx->blk = blk;
4585         pctx->blkcount = blockcnt;
4586
4587         if ((blk < fs->super->s_first_data_block) ||
4588             (blk >= ext2fs_blocks_count(fs->super))) {
4589                 if (fix_problem(ctx, PR_1_BB_ILLEGAL_BLOCK_NUM, pctx)) {
4590                         *block_nr = 0;
4591                         return BLOCK_CHANGED;
4592                 } else
4593                         return 0;
4594         }
4595
4596         if (blockcnt < 0) {
4597                 if (ext2fs_test_block_bitmap2(p->fs_meta_blocks, blk)) {
4598                         p->bbcheck = 1;
4599                         if (fix_problem(ctx, PR_1_BB_FS_BLOCK, pctx)) {
4600                                 *block_nr = 0;
4601                                 return BLOCK_CHANGED;
4602                         }
4603                 } else if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4604                                                     blk)) {
4605                         p->bbcheck = 1;
4606                         if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK,
4607                                         pctx)) {
4608                                 *block_nr = 0;
4609                                 return BLOCK_CHANGED;
4610                         }
4611                         if (e2fsck_should_abort(ctx))
4612                                 return BLOCK_ABORT;
4613                 } else
4614                         mark_block_used(ctx, blk);
4615                 return 0;
4616         }
4617 #if 0
4618         printf ("DEBUG: Marking %u as bad.\n", blk);
4619 #endif
4620         ctx->fs_badblocks_count++;
4621         /*
4622          * If the block is not used, then mark it as used and return.
4623          * If it is already marked as found, this must mean that
4624          * there's an overlap between the filesystem table blocks
4625          * (bitmaps and inode table) and the bad block list.
4626          */
4627         if (!ext2fs_test_block_bitmap2(ctx->block_found_map, blk)) {
4628                 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4629                 return 0;
4630         }
4631         /*
4632          * Try to find the where the filesystem block was used...
4633          */
4634         first_block = fs->super->s_first_data_block;
4635
4636         for (i = 0; i < fs->group_desc_count; i++ ) {
4637                 pctx->group = i;
4638                 pctx->blk = blk;
4639                 if (!ext2fs_bg_has_super(fs, i))
4640                         goto skip_super;
4641                 if (blk == first_block) {
4642                         if (i == 0) {
4643                                 if (fix_problem(ctx,
4644                                                 PR_1_BAD_PRIMARY_SUPERBLOCK,
4645                                                 pctx)) {
4646                                         *block_nr = 0;
4647                                         return BLOCK_CHANGED;
4648                                 }
4649                                 return 0;
4650                         }
4651                         fix_problem(ctx, PR_1_BAD_SUPERBLOCK, pctx);
4652                         return 0;
4653                 }
4654                 if ((blk > first_block) &&
4655                     (blk <= first_block + fs->desc_blocks)) {
4656                         if (i == 0) {
4657                                 pctx->blk = *block_nr;
4658                                 if (fix_problem(ctx,
4659                         PR_1_BAD_PRIMARY_GROUP_DESCRIPTOR, pctx)) {
4660                                         *block_nr = 0;
4661                                         return BLOCK_CHANGED;
4662                                 }
4663                                 return 0;
4664                         }
4665                         fix_problem(ctx, PR_1_BAD_GROUP_DESCRIPTORS, pctx);
4666                         return 0;
4667                 }
4668         skip_super:
4669                 if (blk == ext2fs_block_bitmap_loc(fs, i)) {
4670                         if (fix_problem(ctx, PR_1_BB_BAD_BLOCK, pctx)) {
4671                                 ctx->invalid_block_bitmap_flag[i]++;
4672                                 ctx->invalid_bitmaps++;
4673                         }
4674                         return 0;
4675                 }
4676                 if (blk == ext2fs_inode_bitmap_loc(fs, i)) {
4677                         if (fix_problem(ctx, PR_1_IB_BAD_BLOCK, pctx)) {
4678                                 ctx->invalid_inode_bitmap_flag[i]++;
4679                                 ctx->invalid_bitmaps++;
4680                         }
4681                         return 0;
4682                 }
4683                 if ((blk >= ext2fs_inode_table_loc(fs, i)) &&
4684                     (blk < (ext2fs_inode_table_loc(fs, i) +
4685                             fs->inode_blocks_per_group))) {
4686                         /*
4687                          * If there are bad blocks in the inode table,
4688                          * the inode scan code will try to do
4689                          * something reasonable automatically.
4690                          */
4691                         return 0;
4692                 }
4693                 first_block += fs->super->s_blocks_per_group;
4694         }
4695         /*
4696          * If we've gotten to this point, then the only
4697          * possibility is that the bad block inode meta data
4698          * is using a bad block.
4699          */
4700         if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) ||
4701             (blk == p->inode->i_block[EXT2_DIND_BLOCK]) ||
4702             (blk == p->inode->i_block[EXT2_TIND_BLOCK])) {
4703                 p->bbcheck = 1;
4704                 if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, pctx)) {
4705                         *block_nr = 0;
4706                         return BLOCK_CHANGED;
4707                 }
4708                 if (e2fsck_should_abort(ctx))
4709                         return BLOCK_ABORT;
4710                 return 0;
4711         }
4712
4713         pctx->group = -1;
4714
4715         /* Warn user that the block wasn't claimed */
4716         fix_problem(ctx, PR_1_PROGERR_CLAIMED_BLOCK, pctx);
4717
4718         return 0;
4719 }
4720
4721 static void new_table_block(e2fsck_t ctx, blk64_t first_block, dgrp_t group,
4722                             const char *name, int num, blk64_t *new_block)
4723 {
4724         ext2_filsys fs = ctx->fs;
4725         dgrp_t          last_grp;
4726         blk64_t         old_block = *new_block;
4727         blk64_t         last_block;
4728         dgrp_t          flexbg;
4729         unsigned        flexbg_size;
4730         int             i, is_flexbg;
4731         char            *buf;
4732         struct problem_context  pctx;
4733
4734         clear_problem_context(&pctx);
4735
4736         pctx.group = group;
4737         pctx.blk = old_block;
4738         pctx.str = name;
4739
4740         /*
4741          * For flex_bg filesystems, first try to allocate the metadata
4742          * within the flex_bg, and if that fails then try finding the
4743          * space anywhere in the filesystem.
4744          */
4745         is_flexbg = ext2fs_has_feature_flex_bg(fs->super);
4746         if (is_flexbg) {
4747                 flexbg_size = 1 << fs->super->s_log_groups_per_flex;
4748                 flexbg = group / flexbg_size;
4749                 first_block = ext2fs_group_first_block2(fs,
4750                                                         flexbg_size * flexbg);
4751                 last_grp = group | (flexbg_size - 1);
4752                 if (last_grp >= fs->group_desc_count)
4753                         last_grp = fs->group_desc_count - 1;
4754                 last_block = ext2fs_group_last_block2(fs, last_grp);
4755         } else
4756                 last_block = ext2fs_group_last_block2(fs, group);
4757         pctx.errcode = ext2fs_get_free_blocks2(fs, first_block, last_block,
4758                                                num, ctx->block_found_map,
4759                                                new_block);
4760         if (is_flexbg && (pctx.errcode == EXT2_ET_BLOCK_ALLOC_FAIL))
4761                 pctx.errcode = ext2fs_get_free_blocks2(fs,
4762                                 fs->super->s_first_data_block,
4763                                 ext2fs_blocks_count(fs->super),
4764                                 num, ctx->block_found_map, new_block);
4765         if (pctx.errcode) {
4766                 pctx.num = num;
4767                 fix_problem(ctx, PR_1_RELOC_BLOCK_ALLOCATE, &pctx);
4768                 ext2fs_unmark_valid(fs);
4769                 ctx->flags |= E2F_FLAG_ABORT;
4770                 return;
4771         }
4772         pctx.errcode = ext2fs_get_mem(fs->blocksize, &buf);
4773         if (pctx.errcode) {
4774                 fix_problem(ctx, PR_1_RELOC_MEMORY_ALLOCATE, &pctx);
4775                 ext2fs_unmark_valid(fs);
4776                 ctx->flags |= E2F_FLAG_ABORT;
4777                 return;
4778         }
4779         ext2fs_mark_super_dirty(fs);
4780         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
4781         pctx.blk2 = *new_block;
4782         fix_problem(ctx, (old_block ? PR_1_RELOC_FROM_TO :
4783                           PR_1_RELOC_TO), &pctx);
4784         pctx.blk2 = 0;
4785         for (i = 0; i < num; i++) {
4786                 pctx.blk = i;
4787                 ext2fs_mark_block_bitmap2(ctx->block_found_map, (*new_block)+i);
4788                 if (old_block) {
4789                         pctx.errcode = io_channel_read_blk64(fs->io,
4790                                    old_block + i, 1, buf);
4791                         if (pctx.errcode)
4792                                 fix_problem(ctx, PR_1_RELOC_READ_ERR, &pctx);
4793                         pctx.blk = (*new_block) + i;
4794                         pctx.errcode = io_channel_write_blk64(fs->io, pctx.blk,
4795                                                               1, buf);
4796                 } else {
4797                         pctx.blk = (*new_block) + i;
4798                         pctx.errcode = ext2fs_zero_blocks2(fs, pctx.blk, 1,
4799                                                            NULL, NULL);
4800                 }
4801
4802                 if (pctx.errcode)
4803                         fix_problem(ctx, PR_1_RELOC_WRITE_ERR, &pctx);
4804         }
4805         ext2fs_free_mem(&buf);
4806 }
4807
4808 /*
4809  * This routine gets called at the end of pass 1 if bad blocks are
4810  * detected in the superblock, group descriptors, inode_bitmaps, or
4811  * block bitmaps.  At this point, all of the blocks have been mapped
4812  * out, so we can try to allocate new block(s) to replace the bad
4813  * blocks.
4814  */
4815 static void handle_fs_bad_blocks(e2fsck_t ctx)
4816 {
4817         ext2_filsys fs = ctx->fs;
4818         dgrp_t          i;
4819         blk64_t         first_block;
4820         blk64_t         new_blk;
4821
4822         for (i = 0; i < fs->group_desc_count; i++) {
4823                 first_block = ext2fs_group_first_block2(fs, i);
4824
4825                 if (ctx->invalid_block_bitmap_flag[i]) {
4826                         new_blk = ext2fs_block_bitmap_loc(fs, i);
4827                         new_table_block(ctx, first_block, i, _("block bitmap"),
4828                                         1, &new_blk);
4829                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
4830                 }
4831                 if (ctx->invalid_inode_bitmap_flag[i]) {
4832                         new_blk = ext2fs_inode_bitmap_loc(fs, i);
4833                         new_table_block(ctx, first_block, i, _("inode bitmap"),
4834                                         1, &new_blk);
4835                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
4836                 }
4837                 if (ctx->invalid_inode_table_flag[i]) {
4838                         new_blk = ext2fs_inode_table_loc(fs, i);
4839                         new_table_block(ctx, first_block, i, _("inode table"),
4840                                         fs->inode_blocks_per_group,
4841                                         &new_blk);
4842                         ext2fs_inode_table_loc_set(fs, i, new_blk);
4843                         ctx->flags |= E2F_FLAG_RESTART;
4844                 }
4845         }
4846         ctx->invalid_bitmaps = 0;
4847 }
4848
4849 /*
4850  * This routine marks all blocks which are used by the superblock,
4851  * group descriptors, inode bitmaps, and block bitmaps.
4852  */
4853 static void mark_table_blocks(e2fsck_t ctx)
4854 {
4855         ext2_filsys fs = ctx->fs;
4856         blk64_t b;
4857         dgrp_t  i;
4858         unsigned int    j;
4859         struct problem_context pctx;
4860
4861         clear_problem_context(&pctx);
4862
4863         for (i = 0; i < fs->group_desc_count; i++) {
4864                 pctx.group = i;
4865
4866                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_found_map);
4867                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_metadata_map);
4868
4869                 /*
4870                  * Mark the blocks used for the inode table
4871                  */
4872                 if (ext2fs_inode_table_loc(fs, i)) {
4873                         for (j = 0, b = ext2fs_inode_table_loc(fs, i);
4874                              j < fs->inode_blocks_per_group;
4875                              j++, b++) {
4876                                 if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4877                                                              b)) {
4878                                         pctx.blk = b;
4879                                         if (!ctx->invalid_inode_table_flag[i] &&
4880                                             fix_problem(ctx,
4881                                                 PR_1_ITABLE_CONFLICT, &pctx)) {
4882                                                 ctx->invalid_inode_table_flag[i]++;
4883                                                 ctx->invalid_bitmaps++;
4884                                         }
4885                                 } else {
4886                                     ext2fs_mark_block_bitmap2(
4887                                                 ctx->block_found_map, b);
4888                                     ext2fs_mark_block_bitmap2(
4889                                                 ctx->block_metadata_map, b);
4890                                 }
4891                         }
4892                 }
4893
4894                 /*
4895                  * Mark block used for the block bitmap
4896                  */
4897                 if (ext2fs_block_bitmap_loc(fs, i)) {
4898                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4899                                      ext2fs_block_bitmap_loc(fs, i))) {
4900                                 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
4901                                 if (fix_problem(ctx, PR_1_BB_CONFLICT, &pctx)) {
4902                                         ctx->invalid_block_bitmap_flag[i]++;
4903                                         ctx->invalid_bitmaps++;
4904                                 }
4905                         } else {
4906                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4907                                      ext2fs_block_bitmap_loc(fs, i));
4908                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4909                                      ext2fs_block_bitmap_loc(fs, i));
4910                         }
4911                 }
4912                 /*
4913                  * Mark block used for the inode bitmap
4914                  */
4915                 if (ext2fs_inode_bitmap_loc(fs, i)) {
4916                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4917                                      ext2fs_inode_bitmap_loc(fs, i))) {
4918                                 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
4919                                 if (fix_problem(ctx, PR_1_IB_CONFLICT, &pctx)) {
4920                                         ctx->invalid_inode_bitmap_flag[i]++;
4921                                         ctx->invalid_bitmaps++;
4922                                 }
4923                         } else {
4924                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4925                                      ext2fs_inode_bitmap_loc(fs, i));
4926                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4927                                      ext2fs_inode_bitmap_loc(fs, i));
4928                         }
4929                 }
4930         }
4931 }
4932
4933 /*
4934  * These subroutines short circuits ext2fs_get_blocks and
4935  * ext2fs_check_directory; we use them since we already have the inode
4936  * structure, so there's no point in letting the ext2fs library read
4937  * the inode again.
4938  */
4939 static errcode_t pass1_get_blocks(ext2_filsys fs, ext2_ino_t ino,
4940                                   blk_t *blocks)
4941 {
4942         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4943         int     i;
4944
4945         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4946                 return EXT2_ET_CALLBACK_NOTHANDLED;
4947
4948         for (i=0; i < EXT2_N_BLOCKS; i++)
4949                 blocks[i] = ctx->stashed_inode->i_block[i];
4950         return 0;
4951 }
4952
4953 static errcode_t pass1_read_inode(ext2_filsys fs, ext2_ino_t ino,
4954                                   struct ext2_inode *inode)
4955 {
4956         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4957
4958         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4959                 return EXT2_ET_CALLBACK_NOTHANDLED;
4960         *inode = *ctx->stashed_inode;
4961         return 0;
4962 }
4963
4964 static errcode_t pass1_write_inode(ext2_filsys fs, ext2_ino_t ino,
4965                             struct ext2_inode *inode)
4966 {
4967         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4968
4969         if ((ino == ctx->stashed_ino) && ctx->stashed_inode &&
4970                 (inode != ctx->stashed_inode))
4971                 *ctx->stashed_inode = *inode;
4972         return EXT2_ET_CALLBACK_NOTHANDLED;
4973 }
4974
4975 static errcode_t pass1_check_directory(ext2_filsys fs, ext2_ino_t ino)
4976 {
4977         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4978
4979         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4980                 return EXT2_ET_CALLBACK_NOTHANDLED;
4981
4982         if (!LINUX_S_ISDIR(ctx->stashed_inode->i_mode))
4983                 return EXT2_ET_NO_DIRECTORY;
4984         return 0;
4985 }
4986
4987 static errcode_t e2fsck_get_alloc_block(ext2_filsys fs, blk64_t goal,
4988                                         blk64_t *ret)
4989 {
4990         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4991         errcode_t       retval;
4992         blk64_t         new_block;
4993
4994         if (ctx->block_found_map) {
4995                 retval = ext2fs_new_block2(fs, goal, ctx->block_found_map,
4996                                            &new_block);
4997                 if (retval)
4998                         return retval;
4999                 if (fs->block_map) {
5000                         ext2fs_mark_block_bitmap2(fs->block_map, new_block);
5001                         ext2fs_mark_bb_dirty(fs);
5002                 }
5003         } else {
5004                 if (!fs->block_map) {
5005                         retval = ext2fs_read_block_bitmap(fs);
5006                         if (retval)
5007                                 return retval;
5008                 }
5009
5010                 retval = ext2fs_new_block2(fs, goal, fs->block_map, &new_block);
5011                 if (retval)
5012                         return retval;
5013         }
5014
5015         *ret = new_block;
5016         return (0);
5017 }
5018
5019 static errcode_t e2fsck_new_range(ext2_filsys fs, int flags, blk64_t goal,
5020                                   blk64_t len, blk64_t *pblk, blk64_t *plen)
5021 {
5022         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
5023         errcode_t       retval;
5024
5025         if (ctx->block_found_map)
5026                 return ext2fs_new_range(fs, flags, goal, len,
5027                                         ctx->block_found_map, pblk, plen);
5028
5029         if (!fs->block_map) {
5030                 retval = ext2fs_read_block_bitmap(fs);
5031                 if (retval)
5032                         return retval;
5033         }
5034
5035         return ext2fs_new_range(fs, flags, goal, len, fs->block_map,
5036                                 pblk, plen);
5037 }
5038
5039 static void e2fsck_block_alloc_stats(ext2_filsys fs, blk64_t blk, int inuse)
5040 {
5041         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
5042
5043         /* Never free a critical metadata block */
5044         if (ctx->block_found_map &&
5045             ctx->block_metadata_map &&
5046             inuse < 0 &&
5047             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk))
5048                 return;
5049
5050         if (ctx->block_found_map) {
5051                 if (inuse > 0)
5052                         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
5053                 else
5054                         ext2fs_unmark_block_bitmap2(ctx->block_found_map, blk);
5055         }
5056 }
5057
5058 static void e2fsck_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
5059                                            blk_t num, int inuse)
5060 {
5061         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
5062
5063         /* Never free a critical metadata block */
5064         if (ctx->block_found_map &&
5065             ctx->block_metadata_map &&
5066             inuse < 0 &&
5067             ext2fs_test_block_bitmap_range2(ctx->block_metadata_map, blk, num))
5068                 return;
5069
5070         if (ctx->block_found_map) {
5071                 if (inuse > 0)
5072                         ext2fs_mark_block_bitmap_range2(ctx->block_found_map,
5073                                                         blk, num);
5074                 else
5075                         ext2fs_unmark_block_bitmap_range2(ctx->block_found_map,
5076                                                         blk, num);
5077         }
5078 }
5079
5080 void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts)
5081 {
5082         ext2_filsys fs = ctx->fs;
5083
5084         if (use_shortcuts) {
5085                 fs->get_blocks = pass1_get_blocks;
5086                 fs->check_directory = pass1_check_directory;
5087                 fs->read_inode = pass1_read_inode;
5088                 fs->write_inode = pass1_write_inode;
5089                 ctx->stashed_ino = 0;
5090         } else {
5091                 fs->get_blocks = 0;
5092                 fs->check_directory = 0;
5093                 fs->read_inode = 0;
5094                 fs->write_inode = 0;
5095         }
5096 }
5097
5098 void e2fsck_intercept_block_allocations(e2fsck_t ctx)
5099 {
5100         ext2fs_set_alloc_block_callback(ctx->fs, e2fsck_get_alloc_block, 0);
5101         ext2fs_set_block_alloc_stats_callback(ctx->fs,
5102                                                 e2fsck_block_alloc_stats, 0);
5103         ext2fs_set_new_range_callback(ctx->fs, e2fsck_new_range, NULL);
5104         ext2fs_set_block_alloc_stats_range_callback(ctx->fs,
5105                                         e2fsck_block_alloc_stats_range, NULL);
5106 }