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
  52 #include "e2fsck.h"
  53 #include <ext2fs/ext2_ext_attr.h>
  54 /* todo remove this finally */
  55 #include <ext2fs/ext2fsP.h>
  56 #include <e2p/e2p.h>
  57
  58 #include "problem.h"
  59
  60 #ifdef NO_INLINE_FUNCS
  61 #define _INLINE_
  62 #else
  63 #define _INLINE_ inline
  64 #endif
  65
  66 #undef DEBUG
  67
  68 struct ea_quota {
  69         blk64_t blocks;
  70         __u64 inodes;
  71 };
  72
  73 static int process_block(ext2_filsys fs, blk64_t        *blocknr,
  74                          e2_blkcnt_t blockcnt, blk64_t ref_blk,
  75                          int ref_offset, void *priv_data);
  76 static int process_bad_block(ext2_filsys fs, blk64_t *block_nr,
  77                              e2_blkcnt_t blockcnt, blk64_t ref_blk,
  78                              int ref_offset, void *priv_data);
  79 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
  80                          char *block_buf,
  81                          const struct ea_quota *ea_ibody_quota);
  82 static void mark_table_blocks(e2fsck_t ctx);
  83 static void alloc_bb_map(e2fsck_t ctx);
  84 static void alloc_imagic_map(e2fsck_t ctx);
  85 static void mark_inode_bad(e2fsck_t ctx, ino_t ino);
  86 static void add_casefolded_dir(e2fsck_t ctx, ino_t ino);
  87 static void handle_fs_bad_blocks(e2fsck_t ctx);
  88 static void process_inodes(e2fsck_t ctx, char *block_buf);
  89 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b);
  90 static errcode_t scan_callback(ext2_filsys fs, ext2_inode_scan scan,
  91                                   dgrp_t group, void * priv_data);
  92 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
  93                                     char *block_buf, int adjust_sign);
  94 /* static char *describe_illegal_block(ext2_filsys fs, blk64_t block); */
  95
  96 struct process_block_struct {
  97         ext2_ino_t      ino;
  98         unsigned        is_dir:1, is_reg:1, clear:1, suppress:1,
  99                                 fragmented:1, compressed:1, bbcheck:1,
 100                                 inode_modified:1;
 101         blk64_t         num_blocks;
 102         blk64_t         max_blocks;
 103         blk64_t         last_block;
 104         e2_blkcnt_t     last_init_lblock;
 105         e2_blkcnt_t     last_db_block;
 106         int             num_illegal_blocks;
 107         blk64_t         previous_block;
 108         struct ext2_inode *inode;
 109         struct problem_context *pctx;
 110         ext2fs_block_bitmap fs_meta_blocks;
 111         e2fsck_t        ctx;
 112         blk64_t         next_lblock;
 113         struct extent_tree_info eti;
 114 };
 115
 116 struct process_inode_block {
 117         ext2_ino_t ino;
 118         struct ea_quota ea_ibody_quota;
 119         struct ext2_inode_large inode;
 120 };
 121
 122 struct scan_callback_struct {
 123         e2fsck_t        ctx;
 124         char            *block_buf;
 125 };
 126
 127 /*
 128  * For the inodes to process list.
 129  */
 130 static struct process_inode_block *inodes_to_process;
 131 static int process_inode_count;
 132
 133 static __u64 ext2_max_sizes[EXT2_MAX_BLOCK_LOG_SIZE -
 134                             EXT2_MIN_BLOCK_LOG_SIZE + 1];
 135
 136 /*
 137  * Check to make sure a device inode is real.  Returns 1 if the device
 138  * checks out, 0 if not.
 139  *
 140  * Note: this routine is now also used to check FIFO's and Sockets,
 141  * since they have the same requirement; the i_block fields should be
 142  * zero.
 143  */
 144 int e2fsck_pass1_check_device_inode(ext2_filsys fs EXT2FS_ATTR((unused)),
 145                                     struct ext2_inode *inode)
 146 {
 147         int     i;
 148
 149         /*
 150          * If the index or extents flag is set, then this is a bogus
 151          * device/fifo/socket
 152          */
 153         if (inode->i_flags & (EXT2_INDEX_FL | EXT4_EXTENTS_FL))
 154                 return 0;
 155
 156         /*
 157          * We should be able to do the test below all the time, but
 158          * because the kernel doesn't forcibly clear the device
 159          * inode's additional i_block fields, there are some rare
 160          * occasions when a legitimate device inode will have non-zero
 161          * additional i_block fields.  So for now, we only complain
 162          * when the immutable flag is set, which should never happen
 163          * for devices.  (And that's when the problem is caused, since
 164          * you can't set or clear immutable flags for devices.)  Once
 165          * the kernel has been fixed we can change this...
 166          */
 167         if (inode->i_flags & (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)) {
 168                 for (i=4; i < EXT2_N_BLOCKS; i++)
 169                         if (inode->i_block[i])
 170                                 return 0;
 171         }
 172         return 1;
 173 }
 174
 175 /*
 176  * Check to make sure a symlink inode is real.  Returns 1 if the symlink
 177  * checks out, 0 if not.
 178  */
 179 int e2fsck_pass1_check_symlink(ext2_filsys fs, ext2_ino_t ino,
 180                                struct ext2_inode *inode, char *buf)
 181 {
 182         unsigned int buflen;
 183         unsigned int len;
 184
 185         if ((inode->i_size_high || inode->i_size == 0) ||
 186             (inode->i_flags & EXT2_INDEX_FL))
 187                 return 0;
 188
 189         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
 190                 size_t inline_size;
 191
 192                 if (inode->i_flags & EXT4_EXTENTS_FL)
 193                         return 0;
 194                 if (ext2fs_inline_data_size(fs, ino, &inline_size))
 195                         return 0;
 196                 if (inode->i_size != inline_size)
 197                         return 0;
 198
 199                 return 1;
 200         }
 201
 202         if (ext2fs_is_fast_symlink(inode)) {
 203                 if (inode->i_flags & EXT4_EXTENTS_FL)
 204                         return 0;
 205                 buf = (char *)inode->i_block;
 206                 buflen = sizeof(inode->i_block);
 207         } else {
 208                 ext2_extent_handle_t    handle;
 209                 struct ext2_extent_info info;
 210                 struct ext2fs_extent    extent;
 211                 blk64_t blk;
 212                 int i;
 213
 214                 if (inode->i_flags & EXT4_EXTENTS_FL) {
 215                         if (ext2fs_extent_open2(fs, ino, inode, &handle))
 216                                 return 0;
 217                         if (ext2fs_extent_get_info(handle, &info) ||
 218                             (info.num_entries != 1) ||
 219                             (info.max_depth != 0)) {
 220                                 ext2fs_extent_free(handle);
 221                                 return 0;
 222                         }
 223                         if (ext2fs_extent_get(handle, EXT2_EXTENT_ROOT,
 224                                               &extent) ||
 225                             (extent.e_lblk != 0) ||
 226                             (extent.e_len != 1)) {
 227                                 ext2fs_extent_free(handle);
 228                                 return 0;
 229                         }
 230                         blk = extent.e_pblk;
 231                         ext2fs_extent_free(handle);
 232                 } else {
 233                         blk = inode->i_block[0];
 234
 235                         for (i = 1; i < EXT2_N_BLOCKS; i++)
 236                                 if (inode->i_block[i])
 237                                         return 0;
 238                 }
 239
 240                 if (blk < fs->super->s_first_data_block ||
 241                     blk >= ext2fs_blocks_count(fs->super))
 242                         return 0;
 243
 244                 if (io_channel_read_blk64(fs->io, blk, 1, buf))
 245                         return 0;
 246
 247                 buflen = fs->blocksize;
 248         }
 249
 250         if (inode->i_flags & EXT4_ENCRYPT_FL)
 251                 len = ext2fs_le16_to_cpu(*(__u16 *)buf) + 2;
 252         else
 253                 len = strnlen(buf, buflen);
 254
 255         if (len >= buflen)
 256                 return 0;
 257
 258         if (len != inode->i_size)
 259                 return 0;
 260         return 1;
 261 }
 262
 263 /*
 264  * If the extents or inlinedata flags are set on the inode, offer to clear 'em.
 265  */
 266 #define BAD_SPECIAL_FLAGS (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)
 267 static void check_extents_inlinedata(e2fsck_t ctx,
 268                                      struct problem_context *pctx)
 269 {
 270         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 271                 return;
 272
 273         if (!fix_problem(ctx, PR_1_SPECIAL_EXTENTS_IDATA, pctx))
 274                 return;
 275
 276         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 277         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 278 }
 279 #undef BAD_SPECIAL_FLAGS
 280
 281 /*
 282  * If the immutable (or append-only) flag is set on the inode, offer
 283  * to clear it.
 284  */
 285 #define BAD_SPECIAL_FLAGS (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)
 286 static void check_immutable(e2fsck_t ctx, struct problem_context *pctx)
 287 {
 288         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 289                 return;
 290
 291         if (!fix_problem(ctx, PR_1_SET_IMMUTABLE, pctx))
 292                 return;
 293
 294         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 295         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 296 }
 297
 298 /*
 299  * If device, fifo or socket, check size is zero -- if not offer to
 300  * clear it
 301  */
 302 static void check_size(e2fsck_t ctx, struct problem_context *pctx)
 303 {
 304         struct ext2_inode *inode = pctx->inode;
 305
 306         if (EXT2_I_SIZE(inode) == 0)
 307                 return;
 308
 309         if (!fix_problem(ctx, PR_1_SET_NONZSIZE, pctx))
 310                 return;
 311
 312         ext2fs_inode_size_set(ctx->fs, inode, 0);
 313         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 314 }
 315
 316 /*
 317  * For a given size, calculate how many blocks would be charged towards quota.
 318  */
 319 static blk64_t size_to_quota_blocks(ext2_filsys fs, size_t size)
 320 {
 321         blk64_t clusters;
 322
 323         clusters = DIV_ROUND_UP(size, fs->blocksize << fs->cluster_ratio_bits);
 324         return EXT2FS_C2B(fs, clusters);
 325 }
 326
 327 /*
 328  * Check validity of EA inode. Return 0 if EA inode is valid, otherwise return
 329  * the problem code.
 330  */
 331 static problem_t check_large_ea_inode(e2fsck_t ctx,
 332                                       struct ext2_ext_attr_entry *entry,
 333                                       struct problem_context *pctx,
 334                                       blk64_t *quota_blocks)
 335 {
 336         struct ext2_inode inode;
 337         __u32 hash;
 338         errcode_t retval;
 339
 340         /* Check if inode is within valid range */
 341         if ((entry->e_value_inum < EXT2_FIRST_INODE(ctx->fs->super)) ||
 342             (entry->e_value_inum > ctx->fs->super->s_inodes_count)) {
 343                 pctx->num = entry->e_value_inum;
 344                 return PR_1_ATTR_VALUE_EA_INODE;
 345         }
 346
 347         e2fsck_read_inode(ctx, entry->e_value_inum, &inode, "pass1");
 348
 349         retval = ext2fs_ext_attr_hash_entry2(ctx->fs, entry, NULL, &hash);
 350         if (retval) {
 351                 com_err("check_large_ea_inode", retval,
 352                         _("while hashing entry with e_value_inum = %u"),
 353                         entry->e_value_inum);
 354                 fatal_error(ctx, 0);
 355         }
 356
 357         if (hash == entry->e_hash) {
 358                 *quota_blocks = size_to_quota_blocks(ctx->fs,
 359                                                      entry->e_value_size);
 360         } else {
 361                 /* This might be an old Lustre-style ea_inode reference. */
 362                 if (inode.i_mtime == pctx->ino &&
 363                     inode.i_generation == pctx->inode->i_generation) {
 364                         *quota_blocks = 0;
 365                 } else {
 366                         /* If target inode is also missing EA_INODE flag,
 367                          * this is likely to be a bad reference.
 368                          */
 369                         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 370                                 pctx->num = entry->e_value_inum;
 371                                 return PR_1_ATTR_VALUE_EA_INODE;
 372                         } else {
 373                                 pctx->num = entry->e_hash;
 374                                 return PR_1_ATTR_HASH;
 375                         }
 376                 }
 377         }
 378
 379         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 380                 pctx->num = entry->e_value_inum;
 381                 if (fix_problem(ctx, PR_1_ATTR_SET_EA_INODE_FL, pctx)) {
 382                         inode.i_flags |= EXT4_EA_INODE_FL;
 383                         ext2fs_write_inode(ctx->fs, entry->e_value_inum,
 384                                            &inode);
 385                 } else {
 386                         return PR_1_ATTR_NO_EA_INODE_FL;
 387                 }
 388         }
 389         return 0;
 390 }
 391
 392 static void inc_ea_inode_refs(e2fsck_t ctx, struct problem_context *pctx,
 393                               struct ext2_ext_attr_entry *first, void *end)
 394 {
 395         struct ext2_ext_attr_entry *entry = first;
 396         struct ext2_ext_attr_entry *np = EXT2_EXT_ATTR_NEXT(entry);
 397
 398         while ((void *) entry < end && (void *) np < end &&
 399                !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 400                 if (!entry->e_value_inum)
 401                         goto next;
 402                 if (!ctx->ea_inode_refs) {
 403                         pctx->errcode = ea_refcount_create(0,
 404                                                            &ctx->ea_inode_refs);
 405                         if (pctx->errcode) {
 406                                 pctx->num = 4;
 407                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
 408                                 ctx->flags |= E2F_FLAG_ABORT;
 409                                 return;
 410                         }
 411                 }
 412                 ea_refcount_increment(ctx->ea_inode_refs, entry->e_value_inum,
 413                                       0);
 414         next:
 415                 entry = np;
 416                 np = EXT2_EXT_ATTR_NEXT(entry);
 417         }
 418 }
 419
 420 static void check_ea_in_inode(e2fsck_t ctx, struct problem_context *pctx,
 421                               struct ea_quota *ea_ibody_quota)
 422 {
 423         struct ext2_super_block *sb = ctx->fs->super;
 424         struct ext2_inode_large *inode;
 425         struct ext2_ext_attr_entry *entry;
 426         char *start, *header, *end;
 427         unsigned int storage_size, remain;
 428         problem_t problem = 0;
 429         region_t region = 0;
 430
 431         ea_ibody_quota->blocks = 0;
 432         ea_ibody_quota->inodes = 0;
 433
 434         inode = (struct ext2_inode_large *) pctx->inode;
 435         storage_size = EXT2_INODE_SIZE(ctx->fs->super) - EXT2_GOOD_OLD_INODE_SIZE -
 436                 inode->i_extra_isize;
 437         header = ((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 438                  inode->i_extra_isize;
 439         end = header + storage_size;
 440         start = header + sizeof(__u32);
 441         entry = (struct ext2_ext_attr_entry *) start;
 442
 443         /* scan all entry's headers first */
 444
 445         /* take finish entry 0UL into account */
 446         remain = storage_size - sizeof(__u32);
 447
 448         region = region_create(0, storage_size);
 449         if (!region) {
 450                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
 451                 problem = 0;
 452                 ctx->flags |= E2F_FLAG_ABORT;
 453                 return;
 454         }
 455         if (region_allocate(region, 0, sizeof(__u32))) {
 456                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 457                 goto fix;
 458         }
 459
 460         while (remain >= sizeof(struct ext2_ext_attr_entry) &&
 461                !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 462                 __u32 hash;
 463
 464                 if (region_allocate(region, (char *)entry - (char *)header,
 465                                     EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
 466                         problem = PR_1_INODE_EA_ALLOC_COLLISION;
 467                         goto fix;
 468                 }
 469
 470                 /* header eats this space */
 471                 remain -= sizeof(struct ext2_ext_attr_entry);
 472
 473                 /* is attribute name valid? */
 474                 if (EXT2_EXT_ATTR_SIZE(entry->e_name_len) > remain) {
 475                         pctx->num = entry->e_name_len;
 476                         problem = PR_1_ATTR_NAME_LEN;
 477                         goto fix;
 478                 }
 479
 480                 /* attribute len eats this space */
 481                 remain -= EXT2_EXT_ATTR_SIZE(entry->e_name_len);
 482
 483                 if (entry->e_value_inum == 0) {
 484                         /* check value size */
 485                         if (entry->e_value_size > remain) {
 486                                 pctx->num = entry->e_value_size;
 487                                 problem = PR_1_ATTR_VALUE_SIZE;
 488                                 goto fix;
 489                         }
 490
 491                         if (entry->e_value_size &&
 492                             region_allocate(region,
 493                                             sizeof(__u32) + entry->e_value_offs,
 494                                             EXT2_EXT_ATTR_SIZE(
 495                                                 entry->e_value_size))) {
 496                                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 497                                 goto fix;
 498                         }
 499
 500                         hash = ext2fs_ext_attr_hash_entry(entry,
 501                                                           start + entry->e_value_offs);
 502
 503                         /* e_hash may be 0 in older inode's ea */
 504                         if (entry->e_hash != 0 && entry->e_hash != hash) {
 505                                 pctx->num = entry->e_hash;
 506                                 problem = PR_1_ATTR_HASH;
 507                                 goto fix;
 508                         }
 509                 } else {
 510                         blk64_t quota_blocks;
 511
 512                         problem = check_large_ea_inode(ctx, entry, pctx,
 513                                                        &quota_blocks);
 514                         if (problem != 0)
 515                                 goto fix;
 516
 517                         ea_ibody_quota->blocks += quota_blocks;
 518                         ea_ibody_quota->inodes++;
 519                 }
 520
 521                 /* If EA value is stored in external inode then it does not
 522                  * consume space here */
 523                 if (entry->e_value_inum == 0)
 524                         remain -= entry->e_value_size;
 525
 526                 entry = EXT2_EXT_ATTR_NEXT(entry);
 527         }
 528
 529         if (region_allocate(region, (char *)entry - (char *)header,
 530                             sizeof(__u32))) {
 531                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 532                 goto fix;
 533         }
 534 fix:
 535         if (region)
 536                 region_free(region);
 537         /*
 538          * it seems like a corruption. it's very unlikely we could repair
 539          * EA(s) in automatic fashion -bzzz
 540          */
 541         if (problem == 0 || !fix_problem(ctx, problem, pctx)) {
 542                 inc_ea_inode_refs(ctx, pctx,
 543                                   (struct ext2_ext_attr_entry *)start, end);
 544                 return;
 545         }
 546
 547         /* simply remove all possible EA(s) */
 548         *((__u32 *)header) = 0UL;
 549         e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 550                                 EXT2_INODE_SIZE(sb), "pass1");
 551         ea_ibody_quota->blocks = 0;
 552         ea_ibody_quota->inodes = 0;
 553 }
 554
 555 static int check_inode_extra_negative_epoch(__u32 xtime, __u32 extra) {
 556         return (xtime & (1U << 31)) != 0 &&
 557                 (extra & EXT4_EPOCH_MASK) == EXT4_EPOCH_MASK;
 558 }
 559
 560 #define CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, xtime) \
 561         check_inode_extra_negative_epoch(inode->i_##xtime, \
 562                                          inode->i_##xtime##_extra)
 563
 564 /* When today's date is earlier than 2242, we assume that atimes,
 565  * ctimes, crtimes, and mtimes with years in the range 2310..2378 are
 566  * actually pre-1970 dates mis-encoded.
 567  */
 568 #define EXT4_EXTRA_NEGATIVE_DATE_CUTOFF 2 * (1LL << 32)
 569
 570 static void check_inode_extra_space(e2fsck_t ctx, struct problem_context *pctx,
 571                                     struct ea_quota *ea_ibody_quota)
 572 {
 573         struct ext2_super_block *sb = ctx->fs->super;
 574         struct ext2_inode_large *inode;
 575         __u32 *eamagic;
 576         int min, max;
 577
 578         ea_ibody_quota->blocks = 0;
 579         ea_ibody_quota->inodes = 0;
 580
 581         inode = (struct ext2_inode_large *) pctx->inode;
 582         if (EXT2_INODE_SIZE(sb) == EXT2_GOOD_OLD_INODE_SIZE) {
 583                 /* this isn't large inode. so, nothing to check */
 584                 return;
 585         }
 586
 587 #if 0
 588         printf("inode #%u, i_extra_size %d\n", pctx->ino,
 589                         inode->i_extra_isize);
 590 #endif
 591         /* i_extra_isize must cover i_extra_isize + i_checksum_hi at least */
 592         min = sizeof(inode->i_extra_isize) + sizeof(inode->i_checksum_hi);
 593         max = EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE;
 594         /*
 595          * For now we will allow i_extra_isize to be 0, but really
 596          * implementations should never allow i_extra_isize to be 0
 597          */
 598         if (inode->i_extra_isize &&
 599             (inode->i_extra_isize < min || inode->i_extra_isize > max ||
 600              inode->i_extra_isize & 3)) {
 601                 if (!fix_problem(ctx, PR_1_EXTRA_ISIZE, pctx))
 602                         return;
 603                 if (inode->i_extra_isize < min || inode->i_extra_isize > max)
 604                         inode->i_extra_isize = sb->s_want_extra_isize;
 605                 else
 606                         inode->i_extra_isize = (inode->i_extra_isize + 3) & ~3;
 607                 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 608                                         EXT2_INODE_SIZE(sb), "pass1");
 609         }
 610
 611         /* check if there is no place for an EA header */
 612         if (inode->i_extra_isize >= max - sizeof(__u32))
 613                 return;
 614
 615         eamagic = (__u32 *) (((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 616                         inode->i_extra_isize);
 617         if (*eamagic == EXT2_EXT_ATTR_MAGIC) {
 618                 /* it seems inode has an extended attribute(s) in body */
 619                 check_ea_in_inode(ctx, pctx, ea_ibody_quota);
 620         }
 621
 622         /*
 623          * If the inode's extended atime (ctime, crtime, mtime) is stored in
 624          * the old, invalid format, repair it.
 625          */
 626         if (((sizeof(time_t) <= 4) ||
 627              (((sizeof(time_t) > 4) &&
 628                ctx->now < EXT4_EXTRA_NEGATIVE_DATE_CUTOFF))) &&
 629             (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime) ||
 630              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime) ||
 631              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime) ||
 632              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))) {
 633
 634                 if (!fix_problem(ctx, PR_1_EA_TIME_OUT_OF_RANGE, pctx))
 635                         return;
 636
 637                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime))
 638                         inode->i_atime_extra &= ~EXT4_EPOCH_MASK;
 639                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime))
 640                         inode->i_ctime_extra &= ~EXT4_EPOCH_MASK;
 641                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime))
 642                         inode->i_crtime_extra &= ~EXT4_EPOCH_MASK;
 643                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))
 644                         inode->i_mtime_extra &= ~EXT4_EPOCH_MASK;
 645                 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 646                                         EXT2_INODE_SIZE(sb), "pass1");
 647         }
 648
 649 }
 650
 651 /*
 652  * Check to see if the inode might really be a directory, despite i_mode
 653  *
 654  * This is a lot of complexity for something for which I'm not really
 655  * convinced happens frequently in the wild.  If for any reason this
 656  * causes any problems, take this code out.
 657  * [tytso:20070331.0827EDT]
 658  */
 659 static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx,
 660                                 char *buf)
 661 {
 662         struct ext2_inode *inode = pctx->inode;
 663         struct ext2_dir_entry   *dirent;
 664         errcode_t               retval;
 665         blk64_t                 blk;
 666         unsigned int            i, rec_len, not_device = 0;
 667         int                     extent_fs;
 668         int                     inlinedata_fs;
 669
 670         /*
 671          * If the mode looks OK, we believe it.  If the first block in
 672          * the i_block array is 0, this cannot be a directory. If the
 673          * inode is extent-mapped, it is still the case that the latter
 674          * cannot be 0 - the magic number in the extent header would make
 675          * it nonzero.
 676          */
 677         if (LINUX_S_ISDIR(inode->i_mode) || LINUX_S_ISREG(inode->i_mode) ||
 678             LINUX_S_ISLNK(inode->i_mode) || inode->i_block[0] == 0)
 679                 return;
 680
 681         /*
 682          * Check the block numbers in the i_block array for validity:
 683          * zero blocks are skipped (but the first one cannot be zero -
 684          * see above), other blocks are checked against the first and
 685          * max data blocks (from the the superblock) and against the
 686          * block bitmap. Any invalid block found means this cannot be
 687          * a directory.
 688          *
 689          * If there are non-zero blocks past the fourth entry, then
 690          * this cannot be a device file: we remember that for the next
 691          * check.
 692          *
 693          * For extent mapped files, we don't do any sanity checking:
 694          * just try to get the phys block of logical block 0 and run
 695          * with it.
 696          *
 697          * For inline data files, we just try to get the size of inline
 698          * data.  If it's true, we will treat it as a directory.
 699          */
 700
 701         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
 702         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
 703         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL)) {
 704                 size_t size;
 705                 __u32 dotdot;
 706                 unsigned int rec_len2;
 707                 struct ext2_dir_entry de;
 708
 709                 if (ext2fs_inline_data_size(ctx->fs, pctx->ino, &size))
 710                         return;
 711                 /*
 712                  * If the size isn't a multiple of 4, it's probably not a
 713                  * directory??
 714                  */
 715                 if (size & 3)
 716                         return;
 717                 /*
 718                  * If the first 10 bytes don't look like a directory entry,
 719                  * it's probably not a directory.
 720                  */
 721                 memcpy(&dotdot, inode->i_block, sizeof(dotdot));
 722                 memcpy(&de, ((char *)inode->i_block) + EXT4_INLINE_DATA_DOTDOT_SIZE,
 723                        EXT2_DIR_REC_LEN(0));
 724                 dotdot = ext2fs_le32_to_cpu(dotdot);
 725                 de.inode = ext2fs_le32_to_cpu(de.inode);
 726                 de.rec_len = ext2fs_le16_to_cpu(de.rec_len);
 727                 ext2fs_get_rec_len(ctx->fs, &de, &rec_len2);
 728                 if (dotdot >= ctx->fs->super->s_inodes_count ||
 729                     (dotdot < EXT2_FIRST_INO(ctx->fs->super) &&
 730                      dotdot != EXT2_ROOT_INO) ||
 731                     de.inode >= ctx->fs->super->s_inodes_count ||
 732                     (de.inode < EXT2_FIRST_INO(ctx->fs->super) &&
 733                      de.inode != 0) ||
 734                     rec_len2 > EXT4_MIN_INLINE_DATA_SIZE -
 735                               EXT4_INLINE_DATA_DOTDOT_SIZE)
 736                         return;
 737                 /* device files never have a "system.data" entry */
 738                 goto isdir;
 739         } else if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) {
 740                 /* extent mapped */
 741                 if  (ext2fs_bmap2(ctx->fs, pctx->ino, inode, 0, 0, 0, 0,
 742                                  &blk))
 743                         return;
 744                 /* device files are never extent mapped */
 745                 not_device++;
 746         } else {
 747                 for (i=0; i < EXT2_N_BLOCKS; i++) {
 748                         blk = inode->i_block[i];
 749                         if (!blk)
 750                                 continue;
 751                         if (i >= 4)
 752                                 not_device++;
 753
 754                         if (blk < ctx->fs->super->s_first_data_block ||
 755                             blk >= ext2fs_blocks_count(ctx->fs->super) ||
 756                             ext2fs_fast_test_block_bitmap2(ctx->block_found_map,
 757                                                            blk))
 758                                 return; /* Invalid block, can't be dir */
 759                 }
 760                 blk = inode->i_block[0];
 761         }
 762
 763         /*
 764          * If the mode says this is a device file and the i_links_count field
 765          * is sane and we have not ruled it out as a device file previously,
 766          * we declare it a device file, not a directory.
 767          */
 768         if ((LINUX_S_ISCHR(inode->i_mode) || LINUX_S_ISBLK(inode->i_mode)) &&
 769             (inode->i_links_count == 1) && !not_device)
 770                 return;
 771
 772         /* read the first block */
 773         ehandler_operation(_("reading directory block"));
 774         retval = ext2fs_read_dir_block4(ctx->fs, blk, buf, 0, pctx->ino);
 775         ehandler_operation(0);
 776         if (retval)
 777                 return;
 778
 779         dirent = (struct ext2_dir_entry *) buf;
 780         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 781         if (retval)
 782                 return;
 783         if ((ext2fs_dirent_name_len(dirent) != 1) ||
 784             (dirent->name[0] != '.') ||
 785             (dirent->inode != pctx->ino) ||
 786             (rec_len < 12) ||
 787             (rec_len % 4) ||
 788             (rec_len >= ctx->fs->blocksize - 12))
 789                 return;
 790
 791         dirent = (struct ext2_dir_entry *) (buf + rec_len);
 792         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 793         if (retval)
 794                 return;
 795         if ((ext2fs_dirent_name_len(dirent) != 2) ||
 796             (dirent->name[0] != '.') ||
 797             (dirent->name[1] != '.') ||
 798             (rec_len < 12) ||
 799             (rec_len % 4))
 800                 return;
 801
 802 isdir:
 803         if (fix_problem(ctx, PR_1_TREAT_AS_DIRECTORY, pctx)) {
 804                 inode->i_mode = (inode->i_mode & 07777) | LINUX_S_IFDIR;
 805                 e2fsck_write_inode_full(ctx, pctx->ino, inode,
 806                                         EXT2_INODE_SIZE(ctx->fs->super),
 807                                         "check_is_really_dir");
 808         }
 809 }
 810
 811 extern errcode_t e2fsck_setup_icount(e2fsck_t ctx, const char *icount_name,
 812                                      int flags, ext2_icount_t hint,
 813                                      ext2_icount_t *ret)
 814 {
 815         unsigned int            threshold;
 816         unsigned int            save_type;
 817         ext2_ino_t              num_dirs;
 818         errcode_t               retval;
 819         char                    *tdb_dir;
 820         int                     enable;
 821
 822         *ret = 0;
 823
 824         profile_get_string(ctx->profile, "scratch_files", "directory", 0, 0,
 825                            &tdb_dir);
 826         profile_get_uint(ctx->profile, "scratch_files",
 827                          "numdirs_threshold", 0, 0, &threshold);
 828         profile_get_boolean(ctx->profile, "scratch_files",
 829                             "icount", 0, 1, &enable);
 830
 831         retval = ext2fs_get_num_dirs(ctx->fs, &num_dirs);
 832         if (retval)
 833                 num_dirs = 1024;        /* Guess */
 834
 835         if (enable && tdb_dir && !access(tdb_dir, W_OK) &&
 836             (!threshold || num_dirs > threshold)) {
 837                 retval = ext2fs_create_icount_tdb(ctx->fs, tdb_dir,
 838                                                   flags, ret);
 839                 if (retval == 0)
 840                         return 0;
 841         }
 842         e2fsck_set_bitmap_type(ctx->fs, EXT2FS_BMAP64_RBTREE, icount_name,
 843                                &save_type);
 844         if (ctx->options & E2F_OPT_ICOUNT_FULLMAP)
 845                 flags |= EXT2_ICOUNT_OPT_FULLMAP;
 846         retval = ext2fs_create_icount2(ctx->fs, flags, 0, hint, ret);
 847         ctx->fs->default_bitmap_type = save_type;
 848         return retval;
 849 }
 850
 851 static errcode_t recheck_bad_inode_checksum(ext2_filsys fs, ext2_ino_t ino,
 852                                             e2fsck_t ctx,
 853                                             struct problem_context *pctx)
 854 {
 855         errcode_t retval;
 856         struct ext2_inode_large inode;
 857
 858         /*
 859          * Reread inode.  If we don't see checksum error, then this inode
 860          * has been fixed elsewhere.
 861          */
 862         ctx->stashed_ino = 0;
 863         retval = ext2fs_read_inode_full(fs, ino, (struct ext2_inode *)&inode,
 864                                         sizeof(inode));
 865         if (retval && retval != EXT2_ET_INODE_CSUM_INVALID)
 866                 return retval;
 867         if (!retval)
 868                 return 0;
 869
 870         /*
 871          * Checksum still doesn't match.  That implies that the inode passes
 872          * all the sanity checks, so maybe the checksum is simply corrupt.
 873          * See if the user will go for fixing that.
 874          */
 875         if (!fix_problem(ctx, PR_1_INODE_ONLY_CSUM_INVALID, pctx))
 876                 return 0;
 877
 878         retval = ext2fs_write_inode_full(fs, ino, (struct ext2_inode *)&inode,
 879                                          sizeof(inode));
 880         return retval;
 881 }
 882
 883 static void reserve_block_for_root_repair(e2fsck_t ctx)
 884 {
 885         blk64_t         blk = 0;
 886         errcode_t       err;
 887         ext2_filsys     fs = ctx->fs;
 888
 889         ctx->root_repair_block = 0;
 890         if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO))
 891                 return;
 892
 893         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 894         if (err)
 895                 return;
 896         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 897         ctx->root_repair_block = blk;
 898 }
 899
 900 static void reserve_block_for_lnf_repair(e2fsck_t ctx)
 901 {
 902         blk64_t         blk = 0;
 903         errcode_t       err;
 904         ext2_filsys     fs = ctx->fs;
 905         static const char name[] = "lost+found";
 906         ext2_ino_t      ino;
 907
 908         ctx->lnf_repair_block = 0;
 909         if (!ext2fs_lookup(fs, EXT2_ROOT_INO, name, sizeof(name)-1, 0, &ino))
 910                 return;
 911
 912         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 913         if (err)
 914                 return;
 915         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 916         ctx->lnf_repair_block = blk;
 917 }
 918
 919 static errcode_t get_inline_data_ea_size(ext2_filsys fs, ext2_ino_t ino,
 920                                          size_t *sz)
 921 {
 922         void *p;
 923         struct ext2_xattr_handle *handle;
 924         errcode_t retval;
 925
 926         retval = ext2fs_xattrs_open(fs, ino, &handle);
 927         if (retval)
 928                 return retval;
 929
 930         retval = ext2fs_xattrs_read(handle);
 931         if (retval)
 932                 goto err;
 933
 934         retval = ext2fs_xattr_get(handle, "system.data", &p, sz);
 935         if (retval)
 936                 goto err;
 937         ext2fs_free_mem(&p);
 938 err:
 939         (void) ext2fs_xattrs_close(&handle);
 940         return retval;
 941 }
 942
 943 static void finish_processing_inode(e2fsck_t ctx, ext2_ino_t ino,
 944                                     struct problem_context *pctx,
 945                                     int failed_csum)
 946 {
 947         if (!failed_csum)
 948                 return;
 949
 950         /*
 951          * If the inode failed the checksum and the user didn't
 952          * clear the inode, test the checksum again -- if it still
 953          * fails, ask the user if the checksum should be corrected.
 954          */
 955         pctx->errcode = recheck_bad_inode_checksum(ctx->fs, ino, ctx, pctx);
 956         if (pctx->errcode)
 957                 ctx->flags |= E2F_FLAG_ABORT;
 958 }
 959 #define FINISH_INODE_LOOP(ctx, ino, pctx, failed_csum) \
 960         do { \
 961                 finish_processing_inode((ctx), (ino), (pctx), (failed_csum)); \
 962                 if ((ctx)->flags & E2F_FLAG_ABORT) \
 963                         return; \
 964         } while (0)
 965
 966 static int could_be_block_map(ext2_filsys fs, struct ext2_inode *inode)
 967 {
 968         __u32 x;
 969         int i;
 970
 971         for (i = 0; i < EXT2_N_BLOCKS; i++) {
 972                 x = inode->i_block[i];
 973 #ifdef WORDS_BIGENDIAN
 974                 x = ext2fs_swab32(x);
 975 #endif
 976                 if (x >= ext2fs_blocks_count(fs->super))
 977                         return 0;
 978         }
 979
 980         return 1;
 981 }
 982
 983 /*
 984  * Figure out what to do with an inode that has both extents and inline data
 985  * inode flags set.  Returns -1 if we decide to erase the inode, 0 otherwise.
 986  */
 987 static int fix_inline_data_extents_file(e2fsck_t ctx,
 988                                         ext2_ino_t ino,
 989                                         struct ext2_inode *inode,
 990                                         int inode_size,
 991                                         struct problem_context *pctx)
 992 {
 993         size_t max_inline_ea_size;
 994         ext2_filsys fs = ctx->fs;
 995         int dirty = 0;
 996
 997         /* Both feature flags not set?  Just run the regular checks */
 998         if (!ext2fs_has_feature_extents(fs->super) &&
 999             !ext2fs_has_feature_inline_data(fs->super))
1000                 return 0;
1001
1002         /* Clear both flags if it's a special file */
1003         if (LINUX_S_ISCHR(inode->i_mode) ||
1004             LINUX_S_ISBLK(inode->i_mode) ||
1005             LINUX_S_ISFIFO(inode->i_mode) ||
1006             LINUX_S_ISSOCK(inode->i_mode)) {
1007                 check_extents_inlinedata(ctx, pctx);
1008                 return 0;
1009         }
1010
1011         /* If it looks like an extent tree, try to clear inlinedata */
1012         if (ext2fs_extent_header_verify(inode->i_block,
1013                                  sizeof(inode->i_block)) == 0 &&
1014             fix_problem(ctx, PR_1_CLEAR_INLINE_DATA_FOR_EXTENT, pctx)) {
1015                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1016                 dirty = 1;
1017                 goto out;
1018         }
1019
1020         /* If it looks short enough to be inline data, try to clear extents */
1021         if (inode_size > EXT2_GOOD_OLD_INODE_SIZE)
1022                 max_inline_ea_size = inode_size -
1023                                      (EXT2_GOOD_OLD_INODE_SIZE +
1024                                       ((struct ext2_inode_large *)inode)->i_extra_isize);
1025         else
1026                 max_inline_ea_size = 0;
1027         if (EXT2_I_SIZE(inode) <
1028             EXT4_MIN_INLINE_DATA_SIZE + max_inline_ea_size &&
1029             fix_problem(ctx, PR_1_CLEAR_EXTENT_FOR_INLINE_DATA, pctx)) {
1030                 inode->i_flags &= ~EXT4_EXTENTS_FL;
1031                 dirty = 1;
1032                 goto out;
1033         }
1034
1035         /*
1036          * Too big for inline data, but no evidence of extent tree -
1037          * maybe it's a block map file?  If the mappings all look valid?
1038          */
1039         if (could_be_block_map(fs, inode) &&
1040             fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_FLAGS, pctx)) {
1041 #ifdef WORDS_BIGENDIAN
1042                 int i;
1043
1044                 for (i = 0; i < EXT2_N_BLOCKS; i++)
1045                         inode->i_block[i] = ext2fs_swab32(inode->i_block[i]);
1046 #endif
1047
1048                 inode->i_flags &= ~(EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL);
1049                 dirty = 1;
1050                 goto out;
1051         }
1052
1053         /* Oh well, just clear the busted inode. */
1054         if (fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_INODE, pctx)) {
1055                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1056                 return -1;
1057         }
1058
1059 out:
1060         if (dirty)
1061                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1062
1063         return 0;
1064 }
1065
1066 static void pass1_readahead(e2fsck_t ctx, dgrp_t *group, ext2_ino_t *next_ino)
1067 {
1068         ext2_ino_t inodes_in_group = 0, inodes_per_block, inodes_per_buffer;
1069         dgrp_t start = *group, grp;
1070         blk64_t blocks_to_read = 0;
1071         errcode_t err = EXT2_ET_INVALID_ARGUMENT;
1072
1073         if (ctx->readahead_kb == 0)
1074                 goto out;
1075
1076         /* Keep iterating groups until we have enough to readahead */
1077         inodes_per_block = EXT2_INODES_PER_BLOCK(ctx->fs->super);
1078         for (grp = start; grp < ctx->fs->group_desc_count; grp++) {
1079                 if (ext2fs_bg_flags_test(ctx->fs, grp, EXT2_BG_INODE_UNINIT))
1080                         continue;
1081                 inodes_in_group = ctx->fs->super->s_inodes_per_group -
1082                                         ext2fs_bg_itable_unused(ctx->fs, grp);
1083                 blocks_to_read += (inodes_in_group + inodes_per_block - 1) /
1084                                         inodes_per_block;
1085                 if (blocks_to_read * ctx->fs->blocksize >
1086                     ctx->readahead_kb * 1024)
1087                         break;
1088         }
1089
1090         err = e2fsck_readahead(ctx->fs, E2FSCK_READA_ITABLE, start,
1091                                grp - start + 1);
1092         if (err == EAGAIN) {
1093                 ctx->readahead_kb /= 2;
1094                 err = 0;
1095         }
1096
1097 out:
1098         if (err) {
1099                 /* Error; disable itable readahead */
1100                 *group = ctx->fs->group_desc_count;
1101                 *next_ino = ctx->fs->super->s_inodes_count;
1102         } else {
1103                 /*
1104                  * Don't do more readahead until we've reached the first inode
1105                  * of the last inode scan buffer block for the last group.
1106                  */
1107                 *group = grp + 1;
1108                 inodes_per_buffer = (ctx->inode_buffer_blocks ?
1109                                      ctx->inode_buffer_blocks :
1110                                      EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS) *
1111                                     ctx->fs->blocksize /
1112                                     EXT2_INODE_SIZE(ctx->fs->super);
1113                 inodes_in_group--;
1114                 *next_ino = inodes_in_group -
1115                             (inodes_in_group % inodes_per_buffer) + 1 +
1116                             (grp * ctx->fs->super->s_inodes_per_group);
1117         }
1118 }
1119
1120 /*
1121  * Check if the passed ino is one of the used superblock quota inodes.
1122  *
1123  * Before the quota inodes were journaled, older superblock quota inodes
1124  * were just regular files in the filesystem and not reserved inodes.  This
1125  * checks if the passed ino is one of the s_*_quota_inum superblock fields,
1126  * which may not always be the same as the EXT4_*_QUOTA_INO fields.
1127  */
1128 static int quota_inum_is_super(struct ext2_super_block *sb, ext2_ino_t ino)
1129 {
1130         enum quota_type qtype;
1131
1132         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1133                 if (*quota_sb_inump(sb, qtype) == ino)
1134                         return 1;
1135
1136         return 0;
1137 }
1138
1139 /*
1140  * Check if the passed ino is one of the reserved quota inodes.
1141  * This checks if the inode number is one of the reserved EXT4_*_QUOTA_INO
1142  * inodes.  These inodes may or may not be in use by the quota feature.
1143  */
1144 static int quota_inum_is_reserved(ext2_filsys fs, ext2_ino_t ino)
1145 {
1146         enum quota_type qtype;
1147
1148         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1149                 if (quota_type2inum(qtype, fs->super) == ino)
1150                         return 1;
1151
1152         return 0;
1153 }
1154
1155 static int e2fsck_should_abort(e2fsck_t ctx)
1156 {
1157         e2fsck_t global_ctx;
1158
1159         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1160                 return 1;
1161
1162         if (ctx->global_ctx) {
1163                 global_ctx = ctx->global_ctx;
1164                 if (global_ctx->flags & E2F_FLAG_SIGNAL_MASK)
1165                         return 1;
1166         }
1167         return 0;
1168 }
1169
1170 void e2fsck_pass1_thread(e2fsck_t ctx)
1171 {
1172         int     i;
1173         __u64   max_sizes;
1174         ext2_filsys fs = ctx->fs;
1175         ext2_ino_t      ino = 0;
1176         struct ext2_inode *inode = NULL;
1177         ext2_inode_scan scan = NULL;
1178         char            *block_buf = NULL;
1179 #ifdef RESOURCE_TRACK
1180         struct resource_track   rtrack;
1181 #endif
1182         unsigned char   frag, fsize;
1183         struct          problem_context pctx;
1184         struct          scan_callback_struct scan_struct;
1185         struct ext2_super_block *sb = ctx->fs->super;
1186         const char      *old_op;
1187         const char      *eop_next_inode = _("getting next inode from scan");
1188         int             imagic_fs, extent_fs, inlinedata_fs, casefold_fs;
1189         int             low_dtime_check = 1;
1190         unsigned int    inode_size = EXT2_INODE_SIZE(fs->super);
1191         unsigned int    bufsize;
1192         int             failed_csum = 0;
1193         ext2_ino_t      ino_threshold = 0;
1194         dgrp_t          ra_group = 0;
1195         struct ea_quota ea_ibody_quota;
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 #define EXT2_BPP(bits) (1ULL << ((bits) - 2))
1221
1222         for (i = EXT2_MIN_BLOCK_LOG_SIZE; i <= EXT2_MAX_BLOCK_LOG_SIZE; i++) {
1223                 max_sizes = EXT2_NDIR_BLOCKS + EXT2_BPP(i);
1224                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i);
1225                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i) * EXT2_BPP(i);
1226                 max_sizes = (max_sizes * (1UL << i));
1227                 ext2_max_sizes[i - EXT2_MIN_BLOCK_LOG_SIZE] = max_sizes;
1228         }
1229 #undef EXT2_BPP
1230
1231         imagic_fs = ext2fs_has_feature_imagic_inodes(sb);
1232         extent_fs = ext2fs_has_feature_extents(sb);
1233         inlinedata_fs = ext2fs_has_feature_inline_data(sb);
1234         casefold_fs = ext2fs_has_feature_casefold(sb);
1235
1236         /*
1237          * Allocate bitmaps structures
1238          */
1239         pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("in-use inode map"),
1240                                                     EXT2FS_BMAP64_RBTREE,
1241                                                     "inode_used_map",
1242                                                     &ctx->inode_used_map);
1243         if (pctx.errcode) {
1244                 pctx.num = 1;
1245                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1246                 ctx->flags |= E2F_FLAG_ABORT;
1247                 return;
1248         }
1249         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1250                         _("directory inode map"),
1251                         EXT2FS_BMAP64_AUTODIR,
1252                         "inode_dir_map", &ctx->inode_dir_map);
1253         if (pctx.errcode) {
1254                 pctx.num = 2;
1255                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1256                 ctx->flags |= E2F_FLAG_ABORT;
1257                 return;
1258         }
1259         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1260                         _("regular file inode map"), EXT2FS_BMAP64_RBTREE,
1261                         "inode_reg_map", &ctx->inode_reg_map);
1262         if (pctx.errcode) {
1263                 pctx.num = 6;
1264                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1265                 ctx->flags |= E2F_FLAG_ABORT;
1266                 return;
1267         }
1268         pctx.errcode = e2fsck_allocate_subcluster_bitmap(fs,
1269                         _("in-use block map"), EXT2FS_BMAP64_RBTREE,
1270                         "block_found_map", &ctx->block_found_map);
1271         if (pctx.errcode) {
1272                 pctx.num = 1;
1273                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1274                 ctx->flags |= E2F_FLAG_ABORT;
1275                 return;
1276         }
1277         pctx.errcode = e2fsck_allocate_block_bitmap(fs,
1278                         _("metadata block map"), EXT2FS_BMAP64_RBTREE,
1279                         "block_metadata_map", &ctx->block_metadata_map);
1280         if (pctx.errcode) {
1281                 pctx.num = 1;
1282                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1283                 ctx->flags |= E2F_FLAG_ABORT;
1284                 return;
1285         }
1286         if (casefold_fs) {
1287                 pctx.errcode =
1288                         e2fsck_allocate_inode_bitmap(fs,
1289                                                      _("inode casefold map"),
1290                                                      EXT2FS_BMAP64_RBTREE,
1291                                                      "inode_casefold_map",
1292                                                      &ctx->inode_casefold_map);
1293                 if (pctx.errcode) {
1294                         pctx.num = 1;
1295                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1296                         ctx->flags |= E2F_FLAG_ABORT;
1297                         return;
1298                 }
1299         }
1300         pctx.errcode = e2fsck_setup_icount(ctx, "inode_link_info", 0, NULL,
1301                                            &ctx->inode_link_info);
1302         if (pctx.errcode) {
1303                 fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
1304                 ctx->flags |= E2F_FLAG_ABORT;
1305                 return;
1306         }
1307         bufsize = inode_size;
1308         if (bufsize < sizeof(struct ext2_inode_large))
1309                 bufsize = sizeof(struct ext2_inode_large);
1310         inode = (struct ext2_inode *)
1311                 e2fsck_allocate_memory(ctx, bufsize, "scratch inode");
1312
1313         inodes_to_process = (struct process_inode_block *)
1314                 e2fsck_allocate_memory(ctx,
1315                                        (ctx->process_inode_size *
1316                                         sizeof(struct process_inode_block)),
1317                                        "array of inodes to process");
1318         process_inode_count = 0;
1319
1320         pctx.errcode = ext2fs_init_dblist(fs, 0);
1321         if (pctx.errcode) {
1322                 fix_problem(ctx, PR_1_ALLOCATE_DBCOUNT, &pctx);
1323                 ctx->flags |= E2F_FLAG_ABORT;
1324                 goto endit;
1325         }
1326
1327         /*
1328          * If the last orphan field is set, clear it, since the pass1
1329          * processing will automatically find and clear the orphans.
1330          * In the future, we may want to try using the last_orphan
1331          * linked list ourselves, but for now, we clear it so that the
1332          * ext3 mount code won't get confused.
1333          */
1334         if (!(ctx->options & E2F_OPT_READONLY)) {
1335                 if (fs->super->s_last_orphan) {
1336                         fs->super->s_last_orphan = 0;
1337                         ext2fs_mark_super_dirty(fs);
1338                 }
1339         }
1340
1341         mark_table_blocks(ctx);
1342         pctx.errcode = ext2fs_convert_subcluster_bitmap(fs,
1343                                                 &ctx->block_found_map);
1344         if (pctx.errcode) {
1345                 fix_problem(ctx, PR_1_CONVERT_SUBCLUSTER, &pctx);
1346                 ctx->flags |= E2F_FLAG_ABORT;
1347                 goto endit;
1348         }
1349         block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3,
1350                                                     "block interate buffer");
1351         if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
1352                 e2fsck_use_inode_shortcuts(ctx, 1);
1353         e2fsck_intercept_block_allocations(ctx);
1354         old_op = ehandler_operation(_("opening inode scan"));
1355         pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks,
1356                                               &scan);
1357         ehandler_operation(old_op);
1358         if (pctx.errcode) {
1359                 fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1360                 ctx->flags |= E2F_FLAG_ABORT;
1361                 goto endit;
1362         }
1363         ext2fs_inode_scan_flags(scan, EXT2_SF_SKIP_MISSING_ITABLE |
1364                                       EXT2_SF_WARN_GARBAGE_INODES, 0);
1365         ctx->stashed_inode = inode;
1366         scan_struct.ctx = ctx;
1367         scan_struct.block_buf = block_buf;
1368         ext2fs_set_inode_callback(scan, scan_callback, &scan_struct);
1369         if (ctx->progress && ((ctx->progress)(ctx, 1, 0,
1370                                               ctx->fs->group_desc_count)))
1371                 goto endit;
1372         if ((fs->super->s_wtime &&
1373              fs->super->s_wtime < fs->super->s_inodes_count) ||
1374             (fs->super->s_mtime &&
1375              fs->super->s_mtime < fs->super->s_inodes_count) ||
1376             (fs->super->s_mkfs_time &&
1377              fs->super->s_mkfs_time < fs->super->s_inodes_count))
1378                 low_dtime_check = 0;
1379
1380         if (ext2fs_has_feature_mmp(fs->super) &&
1381             fs->super->s_mmp_block > fs->super->s_first_data_block &&
1382             fs->super->s_mmp_block < ext2fs_blocks_count(fs->super))
1383                 ext2fs_mark_block_bitmap2(ctx->block_found_map,
1384                                           fs->super->s_mmp_block);
1385
1386         /* Set up ctx->lost_and_found if possible */
1387         (void) e2fsck_get_lost_and_found(ctx, 0);
1388
1389         while (1) {
1390                 if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
1391                         if (e2fsck_mmp_update(fs))
1392                                 fatal_error(ctx, 0);
1393                 }
1394                 old_op = ehandler_operation(eop_next_inode);
1395                 pctx.errcode = ext2fs_get_next_inode_full(scan, &ino,
1396                                                           inode, inode_size);
1397                 if (ino > ino_threshold)
1398                         pass1_readahead(ctx, &ra_group, &ino_threshold);
1399                 ehandler_operation(old_op);
1400                 if (e2fsck_should_abort(ctx))
1401                         goto endit;
1402                 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) {
1403                         /*
1404                          * If badblocks says badblocks is bad, offer to clear
1405                          * the list, update the in-core bb list, and restart
1406                          * the inode scan.
1407                          */
1408                         if (ino == EXT2_BAD_INO &&
1409                             fix_problem(ctx, PR_1_BADBLOCKS_IN_BADBLOCKS,
1410                                         &pctx)) {
1411                                 errcode_t err;
1412
1413                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1414                                 ext2fs_badblocks_list_free(ctx->fs->badblocks);
1415                                 ctx->fs->badblocks = NULL;
1416                                 err = ext2fs_read_bb_inode(ctx->fs,
1417                                                         &ctx->fs->badblocks);
1418                                 if (err) {
1419                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1420                                                     &pctx);
1421                                         ctx->flags |= E2F_FLAG_ABORT;
1422                                 } else
1423                                         ctx->flags |= E2F_FLAG_RESTART;
1424                                 goto endit;
1425                         }
1426                         if (!ctx->inode_bb_map)
1427                                 alloc_bb_map(ctx);
1428                         ext2fs_mark_inode_bitmap2(ctx->inode_bb_map, ino);
1429                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1430                         continue;
1431                 }
1432                 if (pctx.errcode &&
1433                     pctx.errcode != EXT2_ET_INODE_CSUM_INVALID &&
1434                     pctx.errcode != EXT2_ET_INODE_IS_GARBAGE) {
1435                         fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1436                         ctx->flags |= E2F_FLAG_ABORT;
1437                         goto endit;
1438                 }
1439                 if (!ino)
1440                         break;
1441                 pctx.ino = ino;
1442                 pctx.inode = inode;
1443                 ctx->stashed_ino = ino;
1444
1445                 /* Clear trashed inode? */
1446                 if (pctx.errcode == EXT2_ET_INODE_IS_GARBAGE &&
1447                     inode->i_links_count > 0 &&
1448                     fix_problem(ctx, PR_1_INODE_IS_GARBAGE, &pctx)) {
1449                         pctx.errcode = 0;
1450                         e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1451                 }
1452                 failed_csum = pctx.errcode != 0;
1453
1454                 /*
1455                  * Check for inodes who might have been part of the
1456                  * orphaned list linked list.  They should have gotten
1457                  * dealt with by now, unless the list had somehow been
1458                  * corrupted.
1459                  *
1460                  * FIXME: In the future, inodes which are still in use
1461                  * (and which are therefore) pending truncation should
1462                  * be handled specially.  Right now we just clear the
1463                  * dtime field, and the normal e2fsck handling of
1464                  * inodes where i_size and the inode blocks are
1465                  * inconsistent is to fix i_size, instead of releasing
1466                  * the extra blocks.  This won't catch the inodes that
1467                  * was at the end of the orphan list, but it's better
1468                  * than nothing.  The right answer is that there
1469                  * shouldn't be any bugs in the orphan list handling.  :-)
1470                  */
1471                 if (inode->i_dtime && low_dtime_check &&
1472                     inode->i_dtime < ctx->fs->super->s_inodes_count) {
1473                         if (fix_problem(ctx, PR_1_LOW_DTIME, &pctx)) {
1474                                 inode->i_dtime = inode->i_links_count ?
1475                                         0 : ctx->now;
1476                                 e2fsck_write_inode(ctx, ino, inode,
1477                                                    "pass1");
1478                                 failed_csum = 0;
1479                         }
1480                 }
1481
1482                 if (inode->i_links_count) {
1483                         pctx.errcode = ext2fs_icount_store(ctx->inode_link_info,
1484                                            ino, inode->i_links_count);
1485                         if (pctx.errcode) {
1486                                 pctx.num = inode->i_links_count;
1487                                 fix_problem(ctx, PR_1_ICOUNT_STORE, &pctx);
1488                                 ctx->flags |= E2F_FLAG_ABORT;
1489                                 goto endit;
1490                         }
1491                 } else if ((ino >= EXT2_FIRST_INODE(fs->super)) &&
1492                            !quota_inum_is_reserved(fs, ino)) {
1493                         if (!inode->i_dtime && inode->i_mode) {
1494                                 if (fix_problem(ctx,
1495                                             PR_1_ZERO_DTIME, &pctx)) {
1496                                         inode->i_dtime = ctx->now;
1497                                         e2fsck_write_inode(ctx, ino, inode,
1498                                                            "pass1");
1499                                         failed_csum = 0;
1500                                 }
1501                         }
1502                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1503                         continue;
1504                 }
1505
1506                 if ((inode->i_flags & EXT4_CASEFOLD_FL) &&
1507                     ((!LINUX_S_ISDIR(inode->i_mode) &&
1508                       fix_problem(ctx, PR_1_CASEFOLD_NONDIR, &pctx)) ||
1509                      (!casefold_fs &&
1510                       fix_problem(ctx, PR_1_CASEFOLD_FEATURE, &pctx)))) {
1511                         inode->i_flags &= ~EXT4_CASEFOLD_FL;
1512                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1513                 }
1514
1515                 /* Conflicting inlinedata/extents inode flags? */
1516                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
1517                     (inode->i_flags & EXT4_EXTENTS_FL)) {
1518                         int res = fix_inline_data_extents_file(ctx, ino, inode,
1519                                                                inode_size,
1520                                                                &pctx);
1521                         if (res < 0) {
1522                                 /* skip FINISH_INODE_LOOP */
1523                                 continue;
1524                         }
1525                 }
1526
1527                 /* Test for incorrect inline_data flags settings. */
1528                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && !inlinedata_fs &&
1529                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1530                         size_t size = 0;
1531
1532                         pctx.errcode = get_inline_data_ea_size(fs, ino, &size);
1533                         if (!pctx.errcode &&
1534                             fix_problem(ctx, PR_1_INLINE_DATA_FEATURE, &pctx)) {
1535                                 ext2fs_set_feature_inline_data(sb);
1536                                 ext2fs_mark_super_dirty(fs);
1537                                 inlinedata_fs = 1;
1538                         } else if (fix_problem(ctx, PR_1_INLINE_DATA_SET, &pctx)) {
1539                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1540                                 /* skip FINISH_INODE_LOOP */
1541                                 continue;
1542                         }
1543                 }
1544
1545                 /* Test for inline data flag but no attr */
1546                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && inlinedata_fs &&
1547                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1548                         size_t size = 0;
1549                         errcode_t err;
1550                         int flags;
1551
1552                         flags = fs->flags;
1553                         if (failed_csum)
1554                                 fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1555                         err = get_inline_data_ea_size(fs, ino, &size);
1556                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1557                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1558
1559                         switch (err) {
1560                         case 0:
1561                                 /* Everything is awesome... */
1562                                 break;
1563                         case EXT2_ET_BAD_EA_BLOCK_NUM:
1564                         case EXT2_ET_BAD_EA_HASH:
1565                         case EXT2_ET_BAD_EA_HEADER:
1566                         case EXT2_ET_EA_BAD_NAME_LEN:
1567                         case EXT2_ET_EA_BAD_VALUE_SIZE:
1568                         case EXT2_ET_EA_KEY_NOT_FOUND:
1569                         case EXT2_ET_EA_NO_SPACE:
1570                         case EXT2_ET_MISSING_EA_FEATURE:
1571                         case EXT2_ET_INLINE_DATA_CANT_ITERATE:
1572                         case EXT2_ET_INLINE_DATA_NO_BLOCK:
1573                         case EXT2_ET_INLINE_DATA_NO_SPACE:
1574                         case EXT2_ET_NO_INLINE_DATA:
1575                         case EXT2_ET_EXT_ATTR_CSUM_INVALID:
1576                         case EXT2_ET_EA_BAD_VALUE_OFFSET:
1577                         case EXT2_ET_EA_INODE_CORRUPTED:
1578                                 /* broken EA or no system.data EA; truncate */
1579                                 if (fix_problem(ctx, PR_1_INLINE_DATA_NO_ATTR,
1580                                                 &pctx)) {
1581                                         err = ext2fs_inode_size_set(fs, inode, 0);
1582                                         if (err) {
1583                                                 pctx.errcode = err;
1584                                                 ctx->flags |= E2F_FLAG_ABORT;
1585                                                 goto endit;
1586                                         }
1587                                         inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1588                                         memset(&inode->i_block, 0,
1589                                                sizeof(inode->i_block));
1590                                         e2fsck_write_inode(ctx, ino, inode,
1591                                                            "pass1");
1592                                         failed_csum = 0;
1593                                 }
1594                                 break;
1595                         default:
1596                                 /* Some other kind of non-xattr error? */
1597                                 pctx.errcode = err;
1598                                 ctx->flags |= E2F_FLAG_ABORT;
1599                                 goto endit;
1600                         }
1601                 }
1602
1603                 /*
1604                  * Test for incorrect extent flag settings.
1605                  *
1606                  * On big-endian machines we must be careful:
1607                  * When the inode is read, the i_block array is not swapped
1608                  * if the extent flag is set.  Therefore if we are testing
1609                  * for or fixing a wrongly-set flag, we must potentially
1610                  * (un)swap before testing, or after fixing.
1611                  */
1612
1613                 /*
1614                  * In this case the extents flag was set when read, so
1615                  * extent_header_verify is ok.  If the inode is cleared,
1616                  * no need to swap... so no extra swapping here.
1617                  */
1618                 if ((inode->i_flags & EXT4_EXTENTS_FL) && !extent_fs &&
1619                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1620                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO))) {
1621                         if ((ext2fs_extent_header_verify(inode->i_block,
1622                                                  sizeof(inode->i_block)) == 0) &&
1623                             fix_problem(ctx, PR_1_EXTENT_FEATURE, &pctx)) {
1624                                 ext2fs_set_feature_extents(sb);
1625                                 ext2fs_mark_super_dirty(fs);
1626                                 extent_fs = 1;
1627                         } else if (fix_problem(ctx, PR_1_EXTENTS_SET, &pctx)) {
1628                         clear_inode:
1629                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1630                                 if (ino == EXT2_BAD_INO)
1631                                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map,
1632                                                                  ino);
1633                                 /* skip FINISH_INODE_LOOP */
1634                                 continue;
1635                         }
1636                 }
1637
1638                 /*
1639                  * For big-endian machines:
1640                  * If the inode didn't have the extents flag set when it
1641                  * was read, then the i_blocks array was swapped.  To test
1642                  * as an extents header, we must swap it back first.
1643                  * IF we then set the extents flag, the entire i_block
1644                  * array must be un/re-swapped to make it proper extents data.
1645                  */
1646                 if (extent_fs && !(inode->i_flags & EXT4_EXTENTS_FL) &&
1647                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1648                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO)) &&
1649                     (LINUX_S_ISREG(inode->i_mode) ||
1650                      LINUX_S_ISDIR(inode->i_mode))) {
1651                         void *ehp;
1652 #ifdef WORDS_BIGENDIAN
1653                         __u32 tmp_block[EXT2_N_BLOCKS];
1654
1655                         for (i = 0; i < EXT2_N_BLOCKS; i++)
1656                                 tmp_block[i] = ext2fs_swab32(inode->i_block[i]);
1657                         ehp = tmp_block;
1658 #else
1659                         ehp = inode->i_block;
1660 #endif
1661                         if ((ext2fs_extent_header_verify(ehp,
1662                                          sizeof(inode->i_block)) == 0) &&
1663                             (fix_problem(ctx, PR_1_UNSET_EXTENT_FL, &pctx))) {
1664                                 inode->i_flags |= EXT4_EXTENTS_FL;
1665 #ifdef WORDS_BIGENDIAN
1666                                 memcpy(inode->i_block, tmp_block,
1667                                        sizeof(inode->i_block));
1668 #endif
1669                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1670                                 failed_csum = 0;
1671                         }
1672                 }
1673
1674                 if (ino == EXT2_BAD_INO) {
1675                         struct process_block_struct pb;
1676
1677                         if ((failed_csum || inode->i_mode || inode->i_uid ||
1678                              inode->i_gid || inode->i_links_count ||
1679                              (inode->i_flags & EXT4_INLINE_DATA_FL) ||
1680                              inode->i_file_acl) &&
1681                             fix_problem(ctx, PR_1_INVALID_BAD_INODE, &pctx)) {
1682                                 memset(inode, 0, sizeof(struct ext2_inode));
1683                                 e2fsck_write_inode(ctx, ino, inode,
1684                                                    "clear bad inode");
1685                                 failed_csum = 0;
1686                         }
1687
1688                         pctx.errcode = ext2fs_copy_bitmap(ctx->block_found_map,
1689                                                           &pb.fs_meta_blocks);
1690                         if (pctx.errcode) {
1691                                 pctx.num = 4;
1692                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1693                                 ctx->flags |= E2F_FLAG_ABORT;
1694                                 goto endit;
1695                         }
1696                         pb.ino = EXT2_BAD_INO;
1697                         pb.num_blocks = pb.last_block = 0;
1698                         pb.last_db_block = -1;
1699                         pb.num_illegal_blocks = 0;
1700                         pb.suppress = 0; pb.clear = 0; pb.is_dir = 0;
1701                         pb.is_reg = 0; pb.fragmented = 0; pb.bbcheck = 0;
1702                         pb.inode = inode;
1703                         pb.pctx = &pctx;
1704                         pb.ctx = ctx;
1705                         pctx.errcode = ext2fs_block_iterate3(fs, ino, 0,
1706                                      block_buf, process_bad_block, &pb);
1707                         ext2fs_free_block_bitmap(pb.fs_meta_blocks);
1708                         if (pctx.errcode) {
1709                                 fix_problem(ctx, PR_1_BLOCK_ITERATE, &pctx);
1710                                 ctx->flags |= E2F_FLAG_ABORT;
1711                                 goto endit;
1712                         }
1713                         if (pb.bbcheck)
1714                                 if (!fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK_PROMPT, &pctx)) {
1715                                 ctx->flags |= E2F_FLAG_ABORT;
1716                                 goto endit;
1717                         }
1718                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1719                         clear_problem_context(&pctx);
1720                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1721                         continue;
1722                 } else if (ino == EXT2_ROOT_INO) {
1723                         /*
1724                          * Make sure the root inode is a directory; if
1725                          * not, offer to clear it.  It will be
1726                          * regenerated in pass #3.
1727                          */
1728                         if (!LINUX_S_ISDIR(inode->i_mode)) {
1729                                 if (fix_problem(ctx, PR_1_ROOT_NO_DIR, &pctx))
1730                                         goto clear_inode;
1731                         }
1732                         /*
1733                          * If dtime is set, offer to clear it.  mke2fs
1734                          * version 0.2b created filesystems with the
1735                          * dtime field set for the root and lost+found
1736                          * directories.  We won't worry about
1737                          * /lost+found, since that can be regenerated
1738                          * easily.  But we will fix the root directory
1739                          * as a special case.
1740                          */
1741                         if (inode->i_dtime && inode->i_links_count) {
1742                                 if (fix_problem(ctx, PR_1_ROOT_DTIME, &pctx)) {
1743                                         inode->i_dtime = 0;
1744                                         e2fsck_write_inode(ctx, ino, inode,
1745                                                            "pass1");
1746                                         failed_csum = 0;
1747                                 }
1748                         }
1749                 } else if (ino == EXT2_JOURNAL_INO) {
1750                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1751                         if (fs->super->s_journal_inum == EXT2_JOURNAL_INO) {
1752                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1753                                     fix_problem(ctx, PR_1_JOURNAL_BAD_MODE,
1754                                                 &pctx)) {
1755                                         inode->i_mode = LINUX_S_IFREG;
1756                                         e2fsck_write_inode(ctx, ino, inode,
1757                                                            "pass1");
1758                                         failed_csum = 0;
1759                                 }
1760                                 check_blocks(ctx, &pctx, block_buf, NULL);
1761                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1762                                 continue;
1763                         }
1764                         if ((inode->i_links_count ||
1765                              inode->i_blocks || inode->i_block[0]) &&
1766                             fix_problem(ctx, PR_1_JOURNAL_INODE_NOT_CLEAR,
1767                                         &pctx)) {
1768                                 memset(inode, 0, inode_size);
1769                                 ext2fs_icount_store(ctx->inode_link_info,
1770                                                     ino, 0);
1771                                 e2fsck_write_inode_full(ctx, ino, inode,
1772                                                         inode_size, "pass1");
1773                                 failed_csum = 0;
1774                         }
1775                 } else if (quota_inum_is_reserved(fs, ino)) {
1776                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1777                         if (ext2fs_has_feature_quota(fs->super) &&
1778                             quota_inum_is_super(fs->super, ino)) {
1779                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1780                                     fix_problem(ctx, PR_1_QUOTA_BAD_MODE,
1781                                                         &pctx)) {
1782                                         inode->i_mode = LINUX_S_IFREG;
1783                                         e2fsck_write_inode(ctx, ino, inode,
1784                                                         "pass1");
1785                                         failed_csum = 0;
1786                                 }
1787                                 check_blocks(ctx, &pctx, block_buf, NULL);
1788                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1789                                 continue;
1790                         }
1791                         if ((inode->i_links_count ||
1792                              inode->i_blocks || inode->i_block[0]) &&
1793                             fix_problem(ctx, PR_1_QUOTA_INODE_NOT_CLEAR,
1794                                         &pctx)) {
1795                                 memset(inode, 0, inode_size);
1796                                 ext2fs_icount_store(ctx->inode_link_info,
1797                                                     ino, 0);
1798                                 e2fsck_write_inode_full(ctx, ino, inode,
1799                                                         inode_size, "pass1");
1800                                 failed_csum = 0;
1801                         }
1802                 } else if (ino < EXT2_FIRST_INODE(fs->super)) {
1803                         problem_t problem = 0;
1804
1805                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1806                         if (ino == EXT2_BOOT_LOADER_INO) {
1807                                 if (LINUX_S_ISDIR(inode->i_mode))
1808                                         problem = PR_1_RESERVED_BAD_MODE;
1809                         } else if (ino == EXT2_RESIZE_INO) {
1810                                 if (inode->i_mode &&
1811                                     !LINUX_S_ISREG(inode->i_mode))
1812                                         problem = PR_1_RESERVED_BAD_MODE;
1813                         } else {
1814                                 if (inode->i_mode != 0)
1815                                         problem = PR_1_RESERVED_BAD_MODE;
1816                         }
1817                         if (problem) {
1818                                 if (fix_problem(ctx, problem, &pctx)) {
1819                                         inode->i_mode = 0;
1820                                         e2fsck_write_inode(ctx, ino, inode,
1821                                                            "pass1");
1822                                         failed_csum = 0;
1823                                 }
1824                         }
1825                         check_blocks(ctx, &pctx, block_buf, NULL);
1826                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1827                         continue;
1828                 }
1829
1830                 if (!inode->i_links_count) {
1831                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1832                         continue;
1833                 }
1834                 /*
1835                  * n.b.  0.3c ext2fs code didn't clear i_links_count for
1836                  * deleted files.  Oops.
1837                  *
1838                  * Since all new ext2 implementations get this right,
1839                  * we now assume that the case of non-zero
1840                  * i_links_count and non-zero dtime means that we
1841                  * should keep the file, not delete it.
1842                  *
1843                  */
1844                 if (inode->i_dtime) {
1845                         if (fix_problem(ctx, PR_1_SET_DTIME, &pctx)) {
1846                                 inode->i_dtime = 0;
1847                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1848                                 failed_csum = 0;
1849                         }
1850                 }
1851
1852                 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1853                 switch (fs->super->s_creator_os) {
1854                     case EXT2_OS_HURD:
1855                         frag = inode->osd2.hurd2.h_i_frag;
1856                         fsize = inode->osd2.hurd2.h_i_fsize;
1857                         break;
1858                     default:
1859                         frag = fsize = 0;
1860                 }
1861
1862                 if (inode->i_faddr || frag || fsize ||
1863                     (!ext2fs_has_feature_largedir(fs->super) &&
1864                     (LINUX_S_ISDIR(inode->i_mode) && inode->i_size_high)))
1865                         mark_inode_bad(ctx, ino);
1866                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1867                     !ext2fs_has_feature_64bit(fs->super) &&
1868                     inode->osd2.linux2.l_i_file_acl_high != 0)
1869                         mark_inode_bad(ctx, ino);
1870                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1871                     !ext2fs_has_feature_huge_file(fs->super) &&
1872                     (inode->osd2.linux2.l_i_blocks_hi != 0))
1873                         mark_inode_bad(ctx, ino);
1874                 if (inode->i_flags & EXT2_IMAGIC_FL) {
1875                         if (imagic_fs) {
1876                                 if (!ctx->inode_imagic_map)
1877                                         alloc_imagic_map(ctx);
1878                                 ext2fs_mark_inode_bitmap2(ctx->inode_imagic_map,
1879                                                          ino);
1880                         } else {
1881                                 if (fix_problem(ctx, PR_1_SET_IMAGIC, &pctx)) {
1882                                         inode->i_flags &= ~EXT2_IMAGIC_FL;
1883                                         e2fsck_write_inode(ctx, ino,
1884                                                            inode, "pass1");
1885                                         failed_csum = 0;
1886                                 }
1887                         }
1888                 }
1889
1890                 check_inode_extra_space(ctx, &pctx, &ea_ibody_quota);
1891                 check_is_really_dir(ctx, &pctx, block_buf);
1892
1893                 /*
1894                  * ext2fs_inode_has_valid_blocks2 does not actually look
1895                  * at i_block[] values, so not endian-sensitive here.
1896                  */
1897                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL) &&
1898                     LINUX_S_ISLNK(inode->i_mode) &&
1899                     !ext2fs_inode_has_valid_blocks2(fs, inode) &&
1900                     fix_problem(ctx, PR_1_FAST_SYMLINK_EXTENT_FL, &pctx)) {
1901                         inode->i_flags &= ~EXT4_EXTENTS_FL;
1902                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1903                         failed_csum = 0;
1904                 }
1905
1906                 if ((inode->i_flags & EXT4_ENCRYPT_FL) &&
1907                     add_encrypted_file(ctx, &pctx) < 0)
1908                         goto clear_inode;
1909
1910                 if (casefold_fs && inode->i_flags & EXT4_CASEFOLD_FL)
1911                         ext2fs_mark_inode_bitmap2(ctx->inode_casefold_map, ino);
1912
1913                 if (LINUX_S_ISDIR(inode->i_mode)) {
1914                         ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
1915                         e2fsck_add_dir_info(ctx, ino, 0);
1916                         ctx->fs_directory_count++;
1917                         if (inode->i_flags & EXT4_CASEFOLD_FL)
1918                                 add_casefolded_dir(ctx, ino);
1919                 } else if (LINUX_S_ISREG (inode->i_mode)) {
1920                         ext2fs_mark_inode_bitmap2(ctx->inode_reg_map, ino);
1921                         ctx->fs_regular_count++;
1922                 } else if (LINUX_S_ISCHR (inode->i_mode) &&
1923                            e2fsck_pass1_check_device_inode(fs, inode)) {
1924                         check_extents_inlinedata(ctx, &pctx);
1925                         check_immutable(ctx, &pctx);
1926                         check_size(ctx, &pctx);
1927                         ctx->fs_chardev_count++;
1928                 } else if (LINUX_S_ISBLK (inode->i_mode) &&
1929                            e2fsck_pass1_check_device_inode(fs, inode)) {
1930                         check_extents_inlinedata(ctx, &pctx);
1931                         check_immutable(ctx, &pctx);
1932                         check_size(ctx, &pctx);
1933                         ctx->fs_blockdev_count++;
1934                 } else if (LINUX_S_ISLNK (inode->i_mode) &&
1935                            e2fsck_pass1_check_symlink(fs, ino, inode,
1936                                                       block_buf)) {
1937                         check_immutable(ctx, &pctx);
1938                         ctx->fs_symlinks_count++;
1939                         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
1940                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1941                                 continue;
1942                         } else if (ext2fs_is_fast_symlink(inode)) {
1943                                 ctx->fs_fast_symlinks_count++;
1944                                 check_blocks(ctx, &pctx, block_buf,
1945                                              &ea_ibody_quota);
1946                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1947                                 continue;
1948                         }
1949                 }
1950                 else if (LINUX_S_ISFIFO (inode->i_mode) &&
1951                          e2fsck_pass1_check_device_inode(fs, inode)) {
1952                         check_extents_inlinedata(ctx, &pctx);
1953                         check_immutable(ctx, &pctx);
1954                         check_size(ctx, &pctx);
1955                         ctx->fs_fifo_count++;
1956                 } else if ((LINUX_S_ISSOCK (inode->i_mode)) &&
1957                            e2fsck_pass1_check_device_inode(fs, inode)) {
1958                         check_extents_inlinedata(ctx, &pctx);
1959                         check_immutable(ctx, &pctx);
1960                         check_size(ctx, &pctx);
1961                         ctx->fs_sockets_count++;
1962                 } else
1963                         mark_inode_bad(ctx, ino);
1964                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1965                     !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
1966                         if (inode->i_block[EXT2_IND_BLOCK])
1967                                 ctx->fs_ind_count++;
1968                         if (inode->i_block[EXT2_DIND_BLOCK])
1969                                 ctx->fs_dind_count++;
1970                         if (inode->i_block[EXT2_TIND_BLOCK])
1971                                 ctx->fs_tind_count++;
1972                 }
1973                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1974                     !(inode->i_flags & EXT4_INLINE_DATA_FL) &&
1975                     (inode->i_block[EXT2_IND_BLOCK] ||
1976                      inode->i_block[EXT2_DIND_BLOCK] ||
1977                      inode->i_block[EXT2_TIND_BLOCK] ||
1978                      ext2fs_file_acl_block(fs, inode))) {
1979                         struct process_inode_block *itp;
1980
1981                         itp = &inodes_to_process[process_inode_count];
1982                         itp->ino = ino;
1983                         itp->ea_ibody_quota = ea_ibody_quota;
1984                         if (inode_size < sizeof(struct ext2_inode_large))
1985                                 memcpy(&itp->inode, inode, inode_size);
1986                         else
1987                                 memcpy(&itp->inode, inode, sizeof(itp->inode));
1988                         process_inode_count++;
1989                 } else
1990                         check_blocks(ctx, &pctx, block_buf, &ea_ibody_quota);
1991
1992                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1993
1994                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1995                         goto endit;
1996
1997                 if (process_inode_count >= ctx->process_inode_size) {
1998                         process_inodes(ctx, block_buf);
1999
2000                         if (e2fsck_should_abort(ctx))
2001                                 goto endit;
2002                 }
2003         }
2004         process_inodes(ctx, block_buf);
2005         ext2fs_close_inode_scan(scan);
2006         scan = NULL;
2007
2008         reserve_block_for_root_repair(ctx);
2009         reserve_block_for_lnf_repair(ctx);
2010
2011         /*
2012          * If any extended attribute blocks' reference counts need to
2013          * be adjusted, either up (ctx->refcount_extra), or down
2014          * (ctx->refcount), then fix them.
2015          */
2016         if (ctx->refcount) {
2017                 adjust_extattr_refcount(ctx, ctx->refcount, block_buf, -1);
2018                 ea_refcount_free(ctx->refcount);
2019                 ctx->refcount = 0;
2020         }
2021         if (ctx->refcount_extra) {
2022                 adjust_extattr_refcount(ctx, ctx->refcount_extra,
2023                                         block_buf, +1);
2024                 ea_refcount_free(ctx->refcount_extra);
2025                 ctx->refcount_extra = 0;
2026         }
2027
2028         if (ctx->ea_block_quota_blocks) {
2029                 ea_refcount_free(ctx->ea_block_quota_blocks);
2030                 ctx->ea_block_quota_blocks = 0;
2031         }
2032
2033         if (ctx->ea_block_quota_inodes) {
2034                 ea_refcount_free(ctx->ea_block_quota_inodes);
2035                 ctx->ea_block_quota_inodes = 0;
2036         }
2037
2038         if (ctx->invalid_bitmaps)
2039                 handle_fs_bad_blocks(ctx);
2040
2041         /* We don't need the block_ea_map any more */
2042         if (ctx->block_ea_map) {
2043                 ext2fs_free_block_bitmap(ctx->block_ea_map);
2044                 ctx->block_ea_map = 0;
2045         }
2046
2047         /* We don't need the encryption policy => ID map any more */
2048         destroy_encryption_policy_map(ctx);
2049
2050         if (ctx->flags & E2F_FLAG_RESIZE_INODE) {
2051                 clear_problem_context(&pctx);
2052                 pctx.errcode = ext2fs_create_resize_inode(fs);
2053                 if (pctx.errcode) {
2054                         if (!fix_problem(ctx, PR_1_RESIZE_INODE_CREATE,
2055                                          &pctx)) {
2056                                 ctx->flags |= E2F_FLAG_ABORT;
2057                                 goto endit;
2058                         }
2059                         pctx.errcode = 0;
2060                 }
2061                 if (!pctx.errcode) {
2062                         e2fsck_read_inode(ctx, EXT2_RESIZE_INO, inode,
2063                                           "recreate inode");
2064                         inode->i_mtime = ctx->now;
2065                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, inode,
2066                                            "recreate inode");
2067                 }
2068                 ctx->flags &= ~E2F_FLAG_RESIZE_INODE;
2069         }
2070
2071         if (ctx->flags & E2F_FLAG_RESTART) {
2072                 /*
2073                  * Only the master copy of the superblock and block
2074                  * group descriptors are going to be written during a
2075                  * restart, so set the superblock to be used to be the
2076                  * master superblock.
2077                  */
2078                 ctx->use_superblock = 0;
2079                 goto endit;
2080         }
2081
2082         if (ctx->large_dirs && !ext2fs_has_feature_largedir(fs->super)) {
2083                 if (fix_problem(ctx, PR_2_FEATURE_LARGE_DIRS, &pctx)) {
2084                         ext2fs_set_feature_largedir(fs->super);
2085                         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2086                         ext2fs_mark_super_dirty(fs);
2087                 }
2088                 if (fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
2089                     fix_problem(ctx, PR_1_FS_REV_LEVEL, &pctx)) {
2090                         ext2fs_update_dynamic_rev(fs);
2091                         ext2fs_mark_super_dirty(fs);
2092                 }
2093         }
2094
2095         if (ctx->block_dup_map) {
2096                 if (ctx->options & E2F_OPT_PREEN) {
2097                         clear_problem_context(&pctx);
2098                         fix_problem(ctx, PR_1_DUP_BLOCKS_PREENSTOP, &pctx);
2099                 }
2100                 e2fsck_pass1_dupblocks(ctx, block_buf);
2101         }
2102         ctx->flags |= E2F_FLAG_ALLOC_OK;
2103 endit:
2104         e2fsck_use_inode_shortcuts(ctx, 0);
2105         ext2fs_free_mem(&inodes_to_process);
2106         inodes_to_process = 0;
2107
2108         if (scan)
2109                 ext2fs_close_inode_scan(scan);
2110         if (block_buf)
2111                 ext2fs_free_mem(&block_buf);
2112         if (inode)
2113                 ext2fs_free_mem(&inode);
2114
2115         /*
2116          * The l+f inode may have been cleared, so zap it now and
2117          * later passes will recalculate it if necessary
2118          */
2119         ctx->lost_and_found = 0;
2120
2121         if ((ctx->flags & E2F_FLAG_SIGNAL_MASK) == 0)
2122                 print_resource_track(ctx, _("Pass 1"), &rtrack, ctx->fs->io);
2123         else
2124                 ctx->invalid_bitmaps++;
2125 }
2126
2127 static errcode_t e2fsck_pass1_copy_bitmap(ext2_filsys fs, ext2fs_generic_bitmap *src,
2128                                           ext2fs_generic_bitmap *dest)
2129 {
2130         errcode_t ret;
2131
2132         ret = ext2fs_copy_bitmap(*src, dest);
2133         if (ret)
2134                 return ret;
2135
2136         (*dest)->fs = fs;
2137         ext2fs_free_generic_bmap(*src);
2138         *src = NULL;
2139
2140         return 0;
2141 }
2142
2143
2144 static errcode_t e2fsck_pass1_copy_fs(ext2_filsys dest, e2fsck_t src_context,
2145                                       ext2_filsys src)
2146 {
2147         errcode_t       retval;
2148
2149         memcpy(dest, src, sizeof(struct struct_ext2_filsys));
2150         if (dest->dblist)
2151                 dest->dblist->fs = dest;
2152         if (src->block_map) {
2153                 retval = e2fsck_pass1_copy_bitmap(dest, &src->block_map,
2154                                                   &dest->block_map);
2155                 if (retval)
2156                         return retval;
2157         }
2158         if (src->inode_map) {
2159                 retval = e2fsck_pass1_copy_bitmap(dest, &src->inode_map,
2160                                                   &dest->inode_map);
2161                 if (retval)
2162                         return retval;
2163         }
2164
2165         if (src->badblocks) {
2166                 retval = ext2fs_badblocks_copy(src->badblocks, &dest->badblocks);
2167                 if (retval)
2168                         return retval;
2169         }
2170
2171         /* disable it for now */
2172         src_context->openfs_flags &= ~EXT2_FLAG_EXCLUSIVE;
2173         retval = ext2fs_open_channel(dest, src_context->io_options,
2174                                      src_context->io_manager,
2175                                      src_context->openfs_flags,
2176                                      src->io->block_size);
2177         if (retval)
2178                 return retval;
2179
2180         /* Block size might not be default */
2181         io_channel_set_blksize(dest->io, src->io->block_size);
2182         ehandler_init(dest->io);
2183
2184         assert(dest->io->magic == src->io->magic);
2185         assert(dest->io->manager == src->io->manager);
2186         assert(strcmp(dest->io->name, src->io->name) == 0);
2187         assert(dest->io->block_size == src->io->block_size);
2188         assert(dest->io->read_error == src->io->read_error);
2189         assert(dest->io->write_error == src->io->write_error);
2190         assert(dest->io->refcount == src->io->refcount);
2191         assert(dest->io->flags == src->io->flags);
2192         assert(dest->io->app_data == dest);
2193         assert(src->io->app_data == src);
2194         assert(dest->io->align == src->io->align);
2195
2196         /* The data should be written to disk immediately */
2197         dest->io->flags |= CHANNEL_FLAGS_WRITETHROUGH;
2198         /* icache will be rebuilt if needed, so do not copy from @src */
2199         src->icache = NULL;
2200         return 0;
2201 }
2202
2203 static int e2fsck_pass1_merge_fs(ext2_filsys dest, ext2_filsys src)
2204 {
2205         struct ext2_inode_cache *icache = dest->icache;
2206         errcode_t retval = 0;
2207         io_channel dest_io;
2208         io_channel dest_image_io;
2209
2210         dest_io = dest->io;
2211         dest_image_io = dest->image_io;
2212
2213         memcpy(dest, src, sizeof(struct struct_ext2_filsys));
2214         dest->io = dest_io;
2215         dest->image_io = dest_image_io;
2216         dest->icache = icache;
2217         if (dest->dblist)
2218                 dest->dblist->fs = dest;
2219         if (src->inode_map) {
2220                 retval = e2fsck_pass1_copy_bitmap(dest, &src->inode_map,
2221                                                   &dest->inode_map);
2222                 if (retval)
2223                         return retval;
2224         }
2225         if (src->block_map) {
2226                 retval = e2fsck_pass1_copy_bitmap(dest, &src->block_map,
2227                                                   &dest->block_map);
2228                 if (retval)
2229                         return retval;
2230         }
2231
2232         if (src->icache) {
2233                 ext2fs_free_inode_cache(src->icache);
2234                 src->icache = NULL;
2235         }
2236
2237         if (src->badblocks) {
2238                 retval = ext2fs_badblocks_copy(src->badblocks, &dest->badblocks);
2239
2240                 ext2fs_badblocks_list_free(src->badblocks);
2241                 src->badblocks = NULL;
2242         }
2243
2244         io_channel_close(src->io);
2245         return retval;
2246 }
2247
2248 static errcode_t e2fsck_pass1_thread_prepare(e2fsck_t global_ctx, e2fsck_t *thread_ctx)
2249 {
2250         errcode_t       retval;
2251         e2fsck_t        thread_context;
2252         ext2_filsys     thread_fs;
2253         ext2_filsys     global_fs = global_ctx->fs;
2254
2255         assert(global_ctx->inode_used_map == NULL);
2256         assert(global_ctx->inode_dir_map == NULL);
2257         assert(global_ctx->inode_bb_map == NULL);
2258         assert(global_ctx->inode_imagic_map == NULL);
2259         assert(global_ctx->inode_reg_map == NULL);
2260         assert(global_ctx->inodes_to_rebuild == NULL);
2261
2262         assert(global_ctx->block_found_map == NULL);
2263         assert(global_ctx->block_dup_map == NULL);
2264         assert(global_ctx->block_ea_map == NULL);
2265         assert(global_ctx->block_metadata_map == NULL);
2266         assert(global_ctx->fs->dblist == NULL);
2267
2268         retval = ext2fs_get_mem(sizeof(struct e2fsck_struct), &thread_context);
2269         if (retval) {
2270                 com_err(global_ctx->program_name, retval, "while allocating memory");
2271                 return retval;
2272         }
2273         memcpy(thread_context, global_ctx, sizeof(struct e2fsck_struct));
2274         thread_context->global_ctx = global_ctx;
2275
2276         retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &thread_fs);
2277         if (retval) {
2278                 com_err(global_ctx->program_name, retval, "while allocating memory");
2279                 goto out_context;
2280         }
2281
2282         io_channel_flush_cleanup(global_fs->io);
2283         retval = e2fsck_pass1_copy_fs(thread_fs, global_ctx, global_fs);
2284         if (retval) {
2285                 com_err(global_ctx->program_name, retval, "while copying fs");
2286                 goto out_fs;
2287         }
2288         thread_fs->priv_data = thread_context;
2289
2290         thread_context->fs = thread_fs;
2291         *thread_ctx = thread_context;
2292         return 0;
2293 out_fs:
2294         ext2fs_free_mem(&thread_fs);
2295 out_context:
2296         ext2fs_free_mem(&thread_context);
2297         return retval;
2298 }
2299
2300 static int e2fsck_pass1_thread_join_one(e2fsck_t global_ctx, e2fsck_t thread_ctx)
2301 {
2302         errcode_t       retval;
2303         int             flags = global_ctx->flags;
2304         ext2_filsys     thread_fs = thread_ctx->fs;
2305         ext2_filsys     global_fs = global_ctx->fs;
2306 #ifdef HAVE_SETJMP_H
2307         jmp_buf         old_jmp;
2308
2309         memcpy(old_jmp, global_ctx->abort_loc, sizeof(jmp_buf));
2310 #endif
2311         memcpy(global_ctx, thread_ctx, sizeof(struct e2fsck_struct));
2312 #ifdef HAVE_SETJMP_H
2313         memcpy(global_ctx->abort_loc, old_jmp, sizeof(jmp_buf));
2314 #endif
2315         /* Keep the global singal flags*/
2316         global_ctx->flags |= (flags & E2F_FLAG_SIGNAL_MASK) |
2317                              (global_ctx->flags & E2F_FLAG_SIGNAL_MASK);
2318
2319         retval = e2fsck_pass1_merge_fs(global_fs, thread_fs);
2320         if (retval) {
2321                 com_err(global_ctx->program_name, 0, _("while merging fs\n"));
2322                 return retval;
2323         }
2324         global_fs->priv_data = global_ctx;
2325         global_ctx->fs = global_fs;
2326
2327         if (thread_ctx->inode_used_map) {
2328                 retval = e2fsck_pass1_copy_bitmap(global_fs,
2329                                         &thread_ctx->inode_used_map,
2330                                         &global_ctx->inode_used_map);
2331                 if (retval)
2332                         return retval;
2333         }
2334         if (thread_ctx->inode_bad_map) {
2335                 retval = e2fsck_pass1_copy_bitmap(global_fs,
2336                                         &thread_ctx->inode_bad_map,
2337                                         &global_ctx->inode_bad_map);
2338                 if (retval)
2339                         return retval;
2340         }
2341         if (thread_ctx->inode_dir_map) {
2342                 retval = e2fsck_pass1_copy_bitmap(global_fs,
2343                                         &thread_ctx->inode_dir_map,
2344                                         &global_ctx->inode_dir_map);
2345                 if (retval)
2346                         return retval;
2347         }
2348         if (thread_ctx->inode_bb_map) {
2349                 retval = e2fsck_pass1_copy_bitmap(global_fs,
2350                                         &thread_ctx->inode_bb_map,
2351                                         &global_ctx->inode_bb_map);
2352                 if (retval)
2353                         return retval;
2354         }
2355         if (thread_ctx->inode_imagic_map) {
2356                 retval = e2fsck_pass1_copy_bitmap(global_fs,
2357                                         &thread_ctx->inode_imagic_map,
2358                                         &global_ctx->inode_imagic_map);
2359                 if (retval)
2360                         return retval;
2361         }
2362         if (thread_ctx->inode_reg_map) {
2363                 retval = e2fsck_pass1_copy_bitmap(global_fs,
2364                                         &thread_ctx->inode_reg_map,
2365                                         &global_ctx->inode_reg_map);
2366                 if (retval)
2367                         return retval;
2368         }
2369         if (thread_ctx->inodes_to_rebuild) {
2370                 retval = e2fsck_pass1_copy_bitmap(global_fs,
2371                                         &thread_ctx->inodes_to_rebuild,
2372                                         &global_ctx->inodes_to_rebuild);
2373                 if (retval)
2374                         return retval;
2375         }
2376         if (thread_ctx->block_found_map) {
2377                 retval = e2fsck_pass1_copy_bitmap(global_fs,
2378                                         &thread_ctx->block_found_map,
2379                                         &global_ctx->block_found_map);
2380                 if (retval)
2381                         return retval;
2382         }
2383         if (thread_ctx->block_dup_map) {
2384                 retval = e2fsck_pass1_copy_bitmap(global_fs,
2385                                         &thread_ctx->block_dup_map,
2386                                         &global_ctx->block_dup_map);
2387                 if (retval)
2388                         return retval;
2389         }
2390         if (thread_ctx->block_ea_map) {
2391                 retval = e2fsck_pass1_copy_bitmap(global_fs,
2392                                         &thread_ctx->block_ea_map,
2393                                         &global_ctx->block_ea_map);
2394                 if (retval)
2395                         return retval;
2396         }
2397         if (thread_ctx->block_metadata_map) {
2398                 retval = e2fsck_pass1_copy_bitmap(global_fs,
2399                                         &thread_ctx->block_metadata_map,
2400                                         &global_ctx->block_metadata_map);
2401                 if (retval)
2402                         return retval;
2403         }
2404
2405         return 0;
2406 }
2407
2408 static int e2fsck_pass1_thread_join(e2fsck_t global_ctx, e2fsck_t thread_ctx)
2409 {
2410         errcode_t       retval;
2411
2412         retval = e2fsck_pass1_thread_join_one(global_ctx, thread_ctx);
2413         ext2fs_free_mem(&thread_ctx->fs);
2414         ext2fs_free_mem(&thread_ctx);
2415
2416         return retval;
2417 }
2418
2419 void e2fsck_pass1_multithread(e2fsck_t ctx)
2420 {
2421         errcode_t       retval;
2422         e2fsck_t        thread_ctx;
2423
2424         retval = e2fsck_pass1_thread_prepare(ctx, &thread_ctx);
2425         if (retval) {
2426                 com_err(ctx->program_name, 0,
2427                         _("while preparing pass1 thread\n"));
2428                 ctx->flags |= E2F_FLAG_ABORT;
2429                 return;
2430         }
2431
2432 #ifdef HAVE_SETJMP_H
2433         /*
2434          * When fatal_error() happens, jump to here. The thread
2435          * context's flags will be saved, but its abort_loc will
2436          * be overwritten by original jump buffer for the later
2437          * tests.
2438          */
2439         if (setjmp(thread_ctx->abort_loc)) {
2440                 thread_ctx->flags &= ~E2F_FLAG_SETJMP_OK;
2441                 e2fsck_pass1_thread_join(ctx, thread_ctx);
2442                 return;
2443         }
2444         thread_ctx->flags |= E2F_FLAG_SETJMP_OK;
2445 #endif
2446
2447         e2fsck_pass1_thread(thread_ctx);
2448         retval = e2fsck_pass1_thread_join(ctx, thread_ctx);
2449         if (retval) {
2450                 com_err(ctx->program_name, 0,
2451                         _("while joining pass1 thread\n"));
2452                 ctx->flags |= E2F_FLAG_ABORT;
2453                 return;
2454         }
2455 }
2456
2457 void e2fsck_pass1(e2fsck_t ctx)
2458 {
2459         e2fsck_pass1_multithread(ctx);
2460 }
2461
2462 #undef FINISH_INODE_LOOP
2463
2464 /*
2465  * When the inode_scan routines call this callback at the end of the
2466  * glock group, call process_inodes.
2467  */
2468 static errcode_t scan_callback(ext2_filsys fs,
2469                                ext2_inode_scan scan EXT2FS_ATTR((unused)),
2470                                dgrp_t group, void * priv_data)
2471 {
2472         struct scan_callback_struct *scan_struct;
2473         e2fsck_t ctx;
2474
2475         scan_struct = (struct scan_callback_struct *) priv_data;
2476         ctx = scan_struct->ctx;
2477
2478         process_inodes((e2fsck_t) fs->priv_data, scan_struct->block_buf);
2479
2480         if (ctx->progress)
2481                 if ((ctx->progress)(ctx, 1, group+1,
2482                                     ctx->fs->group_desc_count))
2483                         return EXT2_ET_CANCEL_REQUESTED;
2484
2485         return 0;
2486 }
2487
2488 /*
2489  * Process the inodes in the "inodes to process" list.
2490  */
2491 static void process_inodes(e2fsck_t ctx, char *block_buf)
2492 {
2493         int                     i;
2494         struct ext2_inode       *old_stashed_inode;
2495         ext2_ino_t              old_stashed_ino;
2496         const char              *old_operation;
2497         char                    buf[80];
2498         struct problem_context  pctx;
2499
2500 #if 0
2501         printf("begin process_inodes: ");
2502 #endif
2503         if (process_inode_count == 0)
2504                 return;
2505         old_operation = ehandler_operation(0);
2506         old_stashed_inode = ctx->stashed_inode;
2507         old_stashed_ino = ctx->stashed_ino;
2508         qsort(inodes_to_process, process_inode_count,
2509                       sizeof(struct process_inode_block), process_inode_cmp);
2510         clear_problem_context(&pctx);
2511         for (i=0; i < process_inode_count; i++) {
2512                 pctx.inode = ctx->stashed_inode =
2513                         (struct ext2_inode *) &inodes_to_process[i].inode;
2514                 pctx.ino = ctx->stashed_ino = inodes_to_process[i].ino;
2515
2516 #if 0
2517                 printf("%u ", pctx.ino);
2518 #endif
2519                 sprintf(buf, _("reading indirect blocks of inode %u"),
2520                         pctx.ino);
2521                 ehandler_operation(buf);
2522                 check_blocks(ctx, &pctx, block_buf,
2523                              &inodes_to_process[i].ea_ibody_quota);
2524                 if (e2fsck_should_abort(ctx))
2525                         break;
2526         }
2527         ctx->stashed_inode = old_stashed_inode;
2528         ctx->stashed_ino = old_stashed_ino;
2529         process_inode_count = 0;
2530 #if 0
2531         printf("end process inodes\n");
2532 #endif
2533         ehandler_operation(old_operation);
2534 }
2535
2536 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b)
2537 {
2538         const struct process_inode_block *ib_a =
2539                 (const struct process_inode_block *) a;
2540         const struct process_inode_block *ib_b =
2541                 (const struct process_inode_block *) b;
2542         int     ret;
2543
2544         ret = (ib_a->inode.i_block[EXT2_IND_BLOCK] -
2545                ib_b->inode.i_block[EXT2_IND_BLOCK]);
2546         if (ret == 0)
2547                 /*
2548                  * We only call process_inodes() for non-extent
2549                  * inodes, so it's OK to pass NULL to
2550                  * ext2fs_file_acl_block() here.
2551                  */
2552                 ret = ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_a->inode)) -
2553                         ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_b->inode));
2554         if (ret == 0)
2555                 ret = ib_a->ino - ib_b->ino;
2556         return ret;
2557 }
2558
2559 /*
2560  * Mark an inode as being bad in some what
2561  */
2562 static void mark_inode_bad(e2fsck_t ctx, ino_t ino)
2563 {
2564         struct          problem_context pctx;
2565
2566         if (!ctx->inode_bad_map) {
2567                 clear_problem_context(&pctx);
2568
2569                 pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2570                                 _("bad inode map"), EXT2FS_BMAP64_RBTREE,
2571                                 "inode_bad_map", &ctx->inode_bad_map);
2572                 if (pctx.errcode) {
2573                         pctx.num = 3;
2574                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2575                         /* Should never get here */
2576                         ctx->flags |= E2F_FLAG_ABORT;
2577                         return;
2578                 }
2579         }
2580         ext2fs_mark_inode_bitmap2(ctx->inode_bad_map, ino);
2581 }
2582
2583 static void add_casefolded_dir(e2fsck_t ctx, ino_t ino)
2584 {
2585         struct          problem_context pctx;
2586
2587         if (!ctx->casefolded_dirs) {
2588                 pctx.errcode = ext2fs_u32_list_create(&ctx->casefolded_dirs, 0);
2589                 if (pctx.errcode)
2590                         goto error;
2591         }
2592         pctx.errcode = ext2fs_u32_list_add(ctx->casefolded_dirs, ino);
2593         if (pctx.errcode == 0)
2594                 return;
2595 error:
2596         fix_problem(ctx, PR_1_ALLOCATE_CASEFOLDED_DIRLIST, &pctx);
2597         /* Should never get here */
2598         ctx->flags |= E2F_FLAG_ABORT;
2599 }
2600
2601 /*
2602  * This procedure will allocate the inode "bb" (badblock) map table
2603  */
2604 static void alloc_bb_map(e2fsck_t ctx)
2605 {
2606         struct          problem_context pctx;
2607
2608         clear_problem_context(&pctx);
2609         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2610                         _("inode in bad block map"), EXT2FS_BMAP64_RBTREE,
2611                         "inode_bb_map", &ctx->inode_bb_map);
2612         if (pctx.errcode) {
2613                 pctx.num = 4;
2614                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2615                 /* Should never get here */
2616                 ctx->flags |= E2F_FLAG_ABORT;
2617                 return;
2618         }
2619 }
2620
2621 /*
2622  * This procedure will allocate the inode imagic table
2623  */
2624 static void alloc_imagic_map(e2fsck_t ctx)
2625 {
2626         struct          problem_context pctx;
2627
2628         clear_problem_context(&pctx);
2629         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2630                         _("imagic inode map"), EXT2FS_BMAP64_RBTREE,
2631                         "inode_imagic_map", &ctx->inode_imagic_map);
2632         if (pctx.errcode) {
2633                 pctx.num = 5;
2634                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2635                 /* Should never get here */
2636                 ctx->flags |= E2F_FLAG_ABORT;
2637                 return;
2638         }
2639 }
2640
2641 /*
2642  * Marks a block as in use, setting the dup_map if it's been set
2643  * already.  Called by process_block and process_bad_block.
2644  *
2645  * WARNING: Assumes checks have already been done to make sure block
2646  * is valid.  This is true in both process_block and process_bad_block.
2647  */
2648 static _INLINE_ void mark_block_used(e2fsck_t ctx, blk64_t block)
2649 {
2650         struct          problem_context pctx;
2651
2652         clear_problem_context(&pctx);
2653
2654         if (ext2fs_fast_test_block_bitmap2(ctx->block_found_map, block)) {
2655                 if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2656                     !(ctx->options & E2F_OPT_UNSHARE_BLOCKS)) {
2657                         return;
2658                 }
2659                 if (!ctx->block_dup_map) {
2660                         pctx.errcode = e2fsck_allocate_block_bitmap(ctx->fs,
2661                                         _("multiply claimed block map"),
2662                                         EXT2FS_BMAP64_RBTREE, "block_dup_map",
2663                                         &ctx->block_dup_map);
2664                         if (pctx.errcode) {
2665                                 pctx.num = 3;
2666                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR,
2667                                             &pctx);
2668                                 /* Should never get here */
2669                                 ctx->flags |= E2F_FLAG_ABORT;
2670                                 return;
2671                         }
2672                 }
2673                 ext2fs_fast_mark_block_bitmap2(ctx->block_dup_map, block);
2674         } else {
2675                 ext2fs_fast_mark_block_bitmap2(ctx->block_found_map, block);
2676         }
2677 }
2678
2679 /*
2680  * When cluster size is greater than one block, it is caller's responsibility
2681  * to make sure block parameter starts at a cluster boundary.
2682  */
2683 static _INLINE_ void mark_blocks_used(e2fsck_t ctx, blk64_t block,
2684                                       unsigned int num)
2685 {
2686         if (ext2fs_test_block_bitmap_range2(ctx->block_found_map, block, num))
2687                 ext2fs_mark_block_bitmap_range2(ctx->block_found_map, block, num);
2688         else {
2689                 unsigned int i;
2690
2691                 for (i = 0; i < num; i += EXT2FS_CLUSTER_RATIO(ctx->fs))
2692                         mark_block_used(ctx, block + i);
2693         }
2694 }
2695
2696 /*
2697  * Adjust the extended attribute block's reference counts at the end
2698  * of pass 1, either by subtracting out references for EA blocks that
2699  * are still referenced in ctx->refcount, or by adding references for
2700  * EA blocks that had extra references as accounted for in
2701  * ctx->refcount_extra.
2702  */
2703 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
2704                                     char *block_buf, int adjust_sign)
2705 {
2706         struct ext2_ext_attr_header     *header;
2707         struct problem_context          pctx;
2708         ext2_filsys                     fs = ctx->fs;
2709         blk64_t                         blk;
2710         __u32                           should_be;
2711         ea_value_t                      count;
2712
2713         clear_problem_context(&pctx);
2714
2715         ea_refcount_intr_begin(refcount);
2716         while (1) {
2717                 if ((blk = ea_refcount_intr_next(refcount, &count)) == 0)
2718                         break;
2719                 pctx.blk = blk;
2720                 pctx.errcode = ext2fs_read_ext_attr3(fs, blk, block_buf,
2721                                                      pctx.ino);
2722                 if (pctx.errcode) {
2723                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
2724                         return;
2725                 }
2726                 header = (struct ext2_ext_attr_header *) block_buf;
2727                 pctx.blkcount = header->h_refcount;
2728                 should_be = header->h_refcount + adjust_sign * (int)count;
2729                 pctx.num = should_be;
2730                 if (fix_problem(ctx, PR_1_EXTATTR_REFCOUNT, &pctx)) {
2731                         header->h_refcount = should_be;
2732                         pctx.errcode = ext2fs_write_ext_attr3(fs, blk,
2733                                                              block_buf,
2734                                                              pctx.ino);
2735                         if (pctx.errcode) {
2736                                 fix_problem(ctx, PR_1_EXTATTR_WRITE_ABORT,
2737                                             &pctx);
2738                                 continue;
2739                         }
2740                 }
2741         }
2742 }
2743
2744 /*
2745  * Handle processing the extended attribute blocks
2746  */
2747 static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx,
2748                            char *block_buf, struct ea_quota *ea_block_quota)
2749 {
2750         ext2_filsys fs = ctx->fs;
2751         ext2_ino_t      ino = pctx->ino;
2752         struct ext2_inode *inode = pctx->inode;
2753         blk64_t         blk;
2754         char *          end;
2755         struct ext2_ext_attr_header *header;
2756         struct ext2_ext_attr_entry *first, *entry;
2757         blk64_t         quota_blocks = EXT2FS_C2B(fs, 1);
2758         __u64           quota_inodes = 0;
2759         region_t        region = 0;
2760         int             failed_csum = 0;
2761
2762         ea_block_quota->blocks = 0;
2763         ea_block_quota->inodes = 0;
2764
2765         blk = ext2fs_file_acl_block(fs, inode);
2766         if (blk == 0)
2767                 return 0;
2768
2769         /*
2770          * If the Extended attribute flag isn't set, then a non-zero
2771          * file acl means that the inode is corrupted.
2772          *
2773          * Or if the extended attribute block is an invalid block,
2774          * then the inode is also corrupted.
2775          */
2776         if (!ext2fs_has_feature_xattr(fs->super) ||
2777             (blk < fs->super->s_first_data_block) ||
2778             (blk >= ext2fs_blocks_count(fs->super))) {
2779                 mark_inode_bad(ctx, ino);
2780                 return 0;
2781         }
2782
2783         /* If ea bitmap hasn't been allocated, create it */
2784         if (!ctx->block_ea_map) {
2785                 pctx->errcode = e2fsck_allocate_block_bitmap(fs,
2786                                         _("ext attr block map"),
2787                                         EXT2FS_BMAP64_RBTREE, "block_ea_map",
2788                                         &ctx->block_ea_map);
2789                 if (pctx->errcode) {
2790                         pctx->num = 2;
2791                         fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, pctx);
2792                         ctx->flags |= E2F_FLAG_ABORT;
2793                         return 0;
2794                 }
2795         }
2796
2797         /* Create the EA refcount structure if necessary */
2798         if (!ctx->refcount) {
2799                 pctx->errcode = ea_refcount_create(0, &ctx->refcount);
2800                 if (pctx->errcode) {
2801                         pctx->num = 1;
2802                         fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2803                         ctx->flags |= E2F_FLAG_ABORT;
2804                         return 0;
2805                 }
2806         }
2807
2808 #if 0
2809         /* Debugging text */
2810         printf("Inode %u has EA block %u\n", ino, blk);
2811 #endif
2812
2813         /* Have we seen this EA block before? */
2814         if (ext2fs_fast_test_block_bitmap2(ctx->block_ea_map, blk)) {
2815                 ea_block_quota->blocks = EXT2FS_C2B(fs, 1);
2816                 ea_block_quota->inodes = 0;
2817
2818                 if (ctx->ea_block_quota_blocks) {
2819                         ea_refcount_fetch(ctx->ea_block_quota_blocks, blk,
2820                                           &quota_blocks);
2821                         if (quota_blocks)
2822                                 ea_block_quota->blocks = quota_blocks;
2823                 }
2824
2825                 if (ctx->ea_block_quota_inodes)
2826                         ea_refcount_fetch(ctx->ea_block_quota_inodes, blk,
2827                                           &ea_block_quota->inodes);
2828
2829                 if (ea_refcount_decrement(ctx->refcount, blk, 0) == 0)
2830                         return 1;
2831                 /* Ooops, this EA was referenced more than it stated */
2832                 if (!ctx->refcount_extra) {
2833                         pctx->errcode = ea_refcount_create(0,
2834                                            &ctx->refcount_extra);
2835                         if (pctx->errcode) {
2836                                 pctx->num = 2;
2837                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2838                                 ctx->flags |= E2F_FLAG_ABORT;
2839                                 return 0;
2840                         }
2841                 }
2842                 ea_refcount_increment(ctx->refcount_extra, blk, 0);
2843                 return 1;
2844         }
2845
2846         /*
2847          * OK, we haven't seen this EA block yet.  So we need to
2848          * validate it
2849          */
2850         pctx->blk = blk;
2851         pctx->errcode = ext2fs_read_ext_attr3(fs, blk, block_buf, pctx->ino);
2852         if (pctx->errcode == EXT2_ET_EXT_ATTR_CSUM_INVALID) {
2853                 pctx->errcode = 0;
2854                 failed_csum = 1;
2855         } else if (pctx->errcode == EXT2_ET_BAD_EA_HEADER)
2856                 pctx->errcode = 0;
2857
2858         if (pctx->errcode &&
2859             fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx)) {
2860                 pctx->errcode = 0;
2861                 goto clear_extattr;
2862         }
2863         header = (struct ext2_ext_attr_header *) block_buf;
2864         pctx->blk = ext2fs_file_acl_block(fs, inode);
2865         if (((ctx->ext_attr_ver == 1) &&
2866              (header->h_magic != EXT2_EXT_ATTR_MAGIC_v1)) ||
2867             ((ctx->ext_attr_ver == 2) &&
2868              (header->h_magic != EXT2_EXT_ATTR_MAGIC))) {
2869                 if (fix_problem(ctx, PR_1_BAD_EA_BLOCK, pctx))
2870                         goto clear_extattr;
2871         }
2872
2873         if (header->h_blocks != 1) {
2874                 if (fix_problem(ctx, PR_1_EA_MULTI_BLOCK, pctx))
2875                         goto clear_extattr;
2876         }
2877
2878         if (pctx->errcode && fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx))
2879                 goto clear_extattr;
2880
2881         region = region_create(0, fs->blocksize);
2882         if (!region) {
2883                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
2884                 ctx->flags |= E2F_FLAG_ABORT;
2885                 return 0;
2886         }
2887         if (region_allocate(region, 0, sizeof(struct ext2_ext_attr_header))) {
2888                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2889                         goto clear_extattr;
2890         }
2891
2892         first = (struct ext2_ext_attr_entry *)(header+1);
2893         end = block_buf + fs->blocksize;
2894         entry = first;
2895         while ((char *)entry < end && *(__u32 *)entry) {
2896                 __u32 hash;
2897
2898                 if (region_allocate(region, (char *)entry - (char *)header,
2899                                    EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
2900                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2901                                 goto clear_extattr;
2902                         break;
2903                 }
2904                 if ((ctx->ext_attr_ver == 1 &&
2905                      (entry->e_name_len == 0 || entry->e_name_index != 0)) ||
2906                     (ctx->ext_attr_ver == 2 &&
2907                      entry->e_name_index == 0)) {
2908                         if (fix_problem(ctx, PR_1_EA_BAD_NAME, pctx))
2909                                 goto clear_extattr;
2910                         break;
2911                 }
2912                 if (entry->e_value_inum == 0) {
2913                         if (entry->e_value_size > EXT2_XATTR_SIZE_MAX ||
2914                             (entry->e_value_offs + entry->e_value_size >
2915                              fs->blocksize)) {
2916                                 if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2917                                         goto clear_extattr;
2918                                 break;
2919                         }
2920                         if (entry->e_value_size &&
2921                             region_allocate(region, entry->e_value_offs,
2922                                             EXT2_EXT_ATTR_SIZE(entry->e_value_size))) {
2923                                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION,
2924                                                 pctx))
2925                                         goto clear_extattr;
2926                         }
2927
2928                         hash = ext2fs_ext_attr_hash_entry(entry, block_buf +
2929                                                           entry->e_value_offs);
2930
2931                         if (entry->e_hash != hash) {
2932                                 pctx->num = entry->e_hash;
2933                                 if (fix_problem(ctx, PR_1_ATTR_HASH, pctx))
2934                                         goto clear_extattr;
2935                                 entry->e_hash = hash;
2936                         }
2937                 } else {
2938                         problem_t problem;
2939                         blk64_t entry_quota_blocks;
2940
2941                         problem = check_large_ea_inode(ctx, entry, pctx,
2942                                                        &entry_quota_blocks);
2943                         if (problem && fix_problem(ctx, problem, pctx))
2944                                 goto clear_extattr;
2945
2946                         quota_blocks += entry_quota_blocks;
2947                         quota_inodes++;
2948                 }
2949
2950                 entry = EXT2_EXT_ATTR_NEXT(entry);
2951         }
2952         if (region_allocate(region, (char *)entry - (char *)header, 4)) {
2953                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2954                         goto clear_extattr;
2955         }
2956         region_free(region);
2957
2958         /*
2959          * We only get here if there was no other errors that were fixed.
2960          * If there was a checksum fail, ask to correct it.
2961          */
2962         if (failed_csum &&
2963             fix_problem(ctx, PR_1_EA_BLOCK_ONLY_CSUM_INVALID, pctx)) {
2964                 pctx->errcode = ext2fs_write_ext_attr3(fs, blk, block_buf,
2965                                                        pctx->ino);
2966                 if (pctx->errcode)
2967                         return 0;
2968         }
2969
2970         if (quota_blocks != EXT2FS_C2B(fs, 1U)) {
2971                 if (!ctx->ea_block_quota_blocks) {
2972                         pctx->errcode = ea_refcount_create(0,
2973                                                 &ctx->ea_block_quota_blocks);
2974                         if (pctx->errcode) {
2975                                 pctx->num = 3;
2976                                 goto refcount_fail;
2977                         }
2978                 }
2979                 ea_refcount_store(ctx->ea_block_quota_blocks, blk,
2980                                   quota_blocks);
2981         }
2982
2983         if (quota_inodes) {
2984                 if (!ctx->ea_block_quota_inodes) {
2985                         pctx->errcode = ea_refcount_create(0,
2986                                                 &ctx->ea_block_quota_inodes);
2987                         if (pctx->errcode) {
2988                                 pctx->num = 4;
2989 refcount_fail:
2990                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2991                                 ctx->flags |= E2F_FLAG_ABORT;
2992                                 return 0;
2993                         }
2994                 }
2995
2996                 ea_refcount_store(ctx->ea_block_quota_inodes, blk,
2997                                   quota_inodes);
2998         }
2999         ea_block_quota->blocks = quota_blocks;
3000         ea_block_quota->inodes = quota_inodes;
3001
3002         inc_ea_inode_refs(ctx, pctx, first, end);
3003         ea_refcount_store(ctx->refcount, blk, header->h_refcount - 1);
3004         mark_block_used(ctx, blk);
3005         ext2fs_fast_mark_block_bitmap2(ctx->block_ea_map, blk);
3006         return 1;
3007
3008 clear_extattr:
3009         if (region)
3010                 region_free(region);
3011         ext2fs_file_acl_block_set(fs, inode, 0);
3012         e2fsck_write_inode(ctx, ino, inode, "check_ext_attr");
3013         return 0;
3014 }
3015
3016 /* Returns 1 if bad htree, 0 if OK */
3017 static int handle_htree(e2fsck_t ctx, struct problem_context *pctx,
3018                         ext2_ino_t ino, struct ext2_inode *inode,
3019                         char *block_buf)
3020 {
3021         struct ext2_dx_root_info        *root;
3022         ext2_filsys                     fs = ctx->fs;
3023         errcode_t                       retval;
3024         blk64_t                         blk;
3025
3026         if ((!LINUX_S_ISDIR(inode->i_mode) &&
3027              fix_problem(ctx, PR_1_HTREE_NODIR, pctx)) ||
3028             (!ext2fs_has_feature_dir_index(fs->super) &&
3029              fix_problem(ctx, PR_1_HTREE_SET, pctx)))
3030                 return 1;
3031
3032         pctx->errcode = ext2fs_bmap2(fs, ino, inode, 0, 0, 0, 0, &blk);
3033
3034         if ((pctx->errcode) ||
3035             (blk == 0) ||
3036             (blk < fs->super->s_first_data_block) ||
3037             (blk >= ext2fs_blocks_count(fs->super))) {
3038                 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
3039                         return 1;
3040                 else
3041                         return 0;
3042         }
3043
3044         retval = io_channel_read_blk64(fs->io, blk, 1, block_buf);
3045         if (retval && fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
3046                 return 1;
3047
3048         /* XXX should check that beginning matches a directory */
3049         root = (struct ext2_dx_root_info *) (block_buf + 24);
3050
3051         if ((root->reserved_zero || root->info_length < 8) &&
3052             fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
3053                 return 1;
3054
3055         pctx->num = root->hash_version;
3056         if ((root->hash_version != EXT2_HASH_LEGACY) &&
3057             (root->hash_version != EXT2_HASH_HALF_MD4) &&
3058             (root->hash_version != EXT2_HASH_TEA) &&
3059             (root->hash_version != EXT2_HASH_SIPHASH) &&
3060             fix_problem(ctx, PR_1_HTREE_HASHV, pctx))
3061                 return 1;
3062
3063         if (ext4_hash_in_dirent(inode)) {
3064                 if (root->hash_version != EXT2_HASH_SIPHASH &&
3065                     fix_problem(ctx, PR_1_HTREE_NEEDS_SIPHASH, pctx))
3066                         return 1;
3067         } else {
3068                 if (root->hash_version == EXT2_HASH_SIPHASH &&
3069                    fix_problem(ctx, PR_1_HTREE_CANNOT_SIPHASH, pctx))
3070                         return 1;
3071         }
3072
3073         if ((root->unused_flags & EXT2_HASH_FLAG_INCOMPAT) &&
3074             fix_problem(ctx, PR_1_HTREE_INCOMPAT, pctx))
3075                 return 1;
3076
3077         pctx->num = root->indirect_levels;
3078         /* if htree level is clearly too high, consider it to be broken */
3079         if (root->indirect_levels > EXT4_HTREE_LEVEL &&
3080             fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
3081                 return 1;
3082
3083         /* if level is only maybe too high, LARGE_DIR feature could be unset */
3084         if (root->indirect_levels > ext2_dir_htree_level(fs) &&
3085             !ext2fs_has_feature_largedir(fs->super)) {
3086                 int blockbits = EXT2_BLOCK_SIZE_BITS(fs->super) + 10;
3087                 unsigned idx_pb = 1 << (blockbits - 3);
3088
3089                 /* compare inode size/blocks vs. max-sized 2-level htree */
3090                 if (EXT2_I_SIZE(pctx->inode) <
3091                     (idx_pb - 1) * (idx_pb - 2) << blockbits &&
3092                     pctx->inode->i_blocks <
3093                     (idx_pb - 1) * (idx_pb - 2) << (blockbits - 9) &&
3094                     fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
3095                         return 1;
3096         }
3097
3098         if (root->indirect_levels > EXT4_HTREE_LEVEL_COMPAT ||
3099             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
3100                 ctx->large_dirs++;
3101
3102         return 0;
3103 }
3104
3105 void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino,
3106                         struct ext2_inode *inode, int restart_flag,
3107                         const char *source)
3108 {
3109         inode->i_flags = 0;
3110         inode->i_links_count = 0;
3111         ext2fs_icount_store(ctx->inode_link_info, ino, 0);
3112         inode->i_dtime = ctx->now;
3113
3114         /*
3115          * If a special inode has such rotten block mappings that we
3116          * want to clear the whole inode, be sure to actually zap
3117          * the block maps because i_links_count isn't checked for
3118          * special inodes, and we'll end up right back here the next
3119          * time we run fsck.
3120          */
3121         if (ino < EXT2_FIRST_INODE(ctx->fs->super))
3122                 memset(inode->i_block, 0, sizeof(inode->i_block));
3123
3124         ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
3125         ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
3126         if (ctx->inode_reg_map)
3127                 ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
3128         if (ctx->inode_bad_map)
3129                 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
3130
3131         /*
3132          * If the inode was partially accounted for before processing
3133          * was aborted, we need to restart the pass 1 scan.
3134          */
3135         ctx->flags |= restart_flag;
3136
3137         if (ino == EXT2_BAD_INO)
3138                 memset(inode, 0, sizeof(struct ext2_inode));
3139
3140         e2fsck_write_inode(ctx, ino, inode, source);
3141 }
3142
3143 /*
3144  * Use the multiple-blocks reclamation code to fix alignment problems in
3145  * a bigalloc filesystem.  We want a logical cluster to map to *only* one
3146  * physical cluster, and we want the block offsets within that cluster to
3147  * line up.
3148  */
3149 static int has_unaligned_cluster_map(e2fsck_t ctx,
3150                                      blk64_t last_pblk, blk64_t last_lblk,
3151                                      blk64_t pblk, blk64_t lblk)
3152 {
3153         blk64_t cluster_mask;
3154
3155         if (!ctx->fs->cluster_ratio_bits)
3156                 return 0;
3157         cluster_mask = EXT2FS_CLUSTER_MASK(ctx->fs);
3158
3159         /*
3160          * If the block in the logical cluster doesn't align with the block in
3161          * the physical cluster...
3162          */
3163         if ((lblk & cluster_mask) != (pblk & cluster_mask))
3164                 return 1;
3165
3166         /*
3167          * If we cross a physical cluster boundary within a logical cluster...
3168          */
3169         if (last_pblk && (lblk & cluster_mask) != 0 &&
3170             EXT2FS_B2C(ctx->fs, lblk) == EXT2FS_B2C(ctx->fs, last_lblk) &&
3171             EXT2FS_B2C(ctx->fs, pblk) != EXT2FS_B2C(ctx->fs, last_pblk))
3172                 return 1;
3173
3174         return 0;
3175 }
3176
3177 static void scan_extent_node(e2fsck_t ctx, struct problem_context *pctx,
3178                              struct process_block_struct *pb,
3179                              blk64_t start_block, blk64_t end_block,
3180                              blk64_t eof_block,
3181                              ext2_extent_handle_t ehandle,
3182                              int try_repairs)
3183 {
3184         struct ext2fs_extent    extent;
3185         blk64_t                 blk, last_lblk;
3186         unsigned int            i, n;
3187         int                     is_dir, is_leaf;
3188         problem_t               problem;
3189         struct ext2_extent_info info;
3190         int                     failed_csum = 0;
3191
3192         if (pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID)
3193                 failed_csum = 1;
3194
3195         pctx->errcode = ext2fs_extent_get_info(ehandle, &info);
3196         if (pctx->errcode)
3197                 return;
3198         if (!(ctx->options & E2F_OPT_FIXES_ONLY) &&
3199             !pb->eti.force_rebuild &&
3200             info.curr_level < MAX_EXTENT_DEPTH_COUNT) {
3201                 struct extent_tree_level *etl;
3202
3203                 etl = pb->eti.ext_info + info.curr_level;
3204                 etl->num_extents += info.num_entries;
3205                 etl->max_extents += info.max_entries;
3206                 /*
3207                  * Implementation wart: Splitting extent blocks when appending
3208                  * will leave the old block with one free entry.  Therefore
3209                  * unless the node is totally full, pretend that a non-root
3210                  * extent block can hold one fewer entry than it actually does,
3211                  * so that we don't repeatedly rebuild the extent tree.
3212                  */
3213                 if (info.curr_level && info.num_entries < info.max_entries)
3214                         etl->max_extents--;
3215         }
3216
3217         pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_FIRST_SIB,
3218                                           &extent);
3219         while ((pctx->errcode == 0 ||
3220                 pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID) &&
3221                info.num_entries-- > 0) {
3222                 is_leaf = extent.e_flags & EXT2_EXTENT_FLAGS_LEAF;
3223                 is_dir = LINUX_S_ISDIR(pctx->inode->i_mode);
3224                 last_lblk = extent.e_lblk + extent.e_len - 1;
3225
3226                 problem = 0;
3227                 pctx->blk = extent.e_pblk;
3228                 pctx->blk2 = extent.e_lblk;
3229                 pctx->num = extent.e_len;
3230                 pctx->blkcount = extent.e_lblk + extent.e_len;
3231
3232                 if (extent.e_pblk == 0 ||
3233                     extent.e_pblk < ctx->fs->super->s_first_data_block ||
3234                     extent.e_pblk >= ext2fs_blocks_count(ctx->fs->super))
3235                         problem = PR_1_EXTENT_BAD_START_BLK;
3236                 else if (extent.e_lblk < start_block)
3237                         problem = PR_1_OUT_OF_ORDER_EXTENTS;
3238                 else if ((end_block && last_lblk > end_block) &&
3239                          !(last_lblk > eof_block &&
3240                            ((extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) ||
3241                             (pctx->inode->i_flags & EXT4_VERITY_FL))))
3242                         problem = PR_1_EXTENT_END_OUT_OF_BOUNDS;
3243                 else if (is_leaf && extent.e_len == 0)
3244                         problem = PR_1_EXTENT_LENGTH_ZERO;
3245                 else if (is_leaf &&
3246                          (extent.e_pblk + extent.e_len) >
3247                          ext2fs_blocks_count(ctx->fs->super))
3248                         problem = PR_1_EXTENT_ENDS_BEYOND;
3249                 else if (is_leaf && is_dir && !pctx->inode->i_size_high &&
3250                          !ext2fs_has_feature_largedir(ctx->fs->super) &&
3251                          ((extent.e_lblk + extent.e_len) >
3252                           (1U << (21 - ctx->fs->super->s_log_block_size))))
3253                         problem = PR_1_TOOBIG_DIR;
3254
3255                 if (is_leaf && problem == 0 && extent.e_len > 0) {
3256 #if 0
3257                         printf("extent_region(ino=%u, expect=%llu, "
3258                                "lblk=%llu, len=%u)\n", pb->ino,
3259                                (unsigned long long) pb->next_lblock,
3260                                (unsigned long long) extent.e_lblk,
3261                                extent.e_len);
3262 #endif
3263                         if (extent.e_lblk < pb->next_lblock)
3264                                 problem = PR_1_EXTENT_COLLISION;
3265                         else if (extent.e_lblk + extent.e_len > pb->next_lblock)
3266                                 pb->next_lblock = extent.e_lblk + extent.e_len;
3267                 }
3268
3269                 /*
3270                  * Uninitialized blocks in a directory?  Clear the flag and
3271                  * we'll interpret the blocks later.
3272                  */
3273                 if (try_repairs && is_dir && problem == 0 &&
3274                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
3275                     fix_problem(ctx, PR_1_UNINIT_DBLOCK, pctx)) {
3276                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
3277                         pb->inode_modified = 1;
3278                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
3279                                                               &extent);
3280                         if (pctx->errcode)
3281                                 return;
3282                         failed_csum = 0;
3283                 }
3284 #ifdef CONFIG_DEVELOPER_FEATURES
3285                 if (try_repairs && !is_dir && problem == 0 &&
3286                     (ctx->options & E2F_OPT_CLEAR_UNINIT) &&
3287                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
3288                     fix_problem(ctx, PR_1_CLEAR_UNINIT_EXTENT, pctx)) {
3289                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
3290                         pb->inode_modified = 1;
3291                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
3292                                                               &extent);
3293                         if (pctx->errcode)
3294                                 return;
3295                         failed_csum = 0;
3296                 }
3297 #endif
3298                 if (try_repairs && problem) {
3299 report_problem:
3300                         if (fix_problem(ctx, problem, pctx)) {
3301                                 if (ctx->invalid_bitmaps) {
3302                                         /*
3303                                          * If fsck knows the bitmaps are bad,
3304                                          * skip to the next extent and
3305                                          * try to clear this extent again
3306                                          * after fixing the bitmaps, by
3307                                          * restarting fsck.
3308                                          */
3309                                         pctx->errcode = ext2fs_extent_get(
3310                                                           ehandle,
3311                                                           EXT2_EXTENT_NEXT_SIB,
3312                                                           &extent);
3313                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3314                                         if (pctx->errcode ==
3315                                                     EXT2_ET_NO_CURRENT_NODE) {
3316                                                 pctx->errcode = 0;
3317                                                 break;
3318                                         }
3319                                         continue;
3320                                 }
3321                                 e2fsck_read_bitmaps(ctx);
3322                                 pb->inode_modified = 1;
3323                                 pctx->errcode =
3324                                         ext2fs_extent_delete(ehandle, 0);
3325                                 if (pctx->errcode) {
3326                                         pctx->str = "ext2fs_extent_delete";
3327                                         return;
3328                                 }
3329                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3330                                 if (pctx->errcode &&
3331                                     pctx->errcode != EXT2_ET_NO_CURRENT_NODE) {
3332                                         pctx->str = "ext2fs_extent_fix_parents";
3333                                         return;
3334                                 }
3335                                 pctx->errcode = ext2fs_extent_get(ehandle,
3336                                                                   EXT2_EXTENT_CURRENT,
3337                                                                   &extent);
3338                                 if (pctx->errcode == EXT2_ET_NO_CURRENT_NODE) {
3339                                         pctx->errcode = 0;
3340                                         break;
3341                                 }
3342                                 failed_csum = 0;
3343                                 continue;
3344                         }
3345                         goto next;
3346                 }
3347
3348                 if (!is_leaf) {
3349                         blk64_t lblk = extent.e_lblk;
3350                         int next_try_repairs = 1;
3351
3352                         blk = extent.e_pblk;
3353
3354                         /*
3355                          * If this lower extent block collides with critical
3356                          * metadata, don't try to repair the damage.  Pass 1b
3357                          * will reallocate the block; then we can try again.
3358                          */
3359                         if (pb->ino != EXT2_RESIZE_INO &&
3360                             extent.e_pblk < ctx->fs->super->s_blocks_count &&
3361                             ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3362                                                       extent.e_pblk)) {
3363                                 next_try_repairs = 0;
3364                                 pctx->blk = blk;
3365                                 fix_problem(ctx,
3366                                             PR_1_CRITICAL_METADATA_COLLISION,
3367                                             pctx);
3368                                 if ((ctx->options & E2F_OPT_NO) == 0)
3369                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3370                         }
3371                         pctx->errcode = ext2fs_extent_get(ehandle,
3372                                                   EXT2_EXTENT_DOWN, &extent);
3373                         if (pctx->errcode &&
3374                             pctx->errcode != EXT2_ET_EXTENT_CSUM_INVALID) {
3375                                 pctx->str = "EXT2_EXTENT_DOWN";
3376                                 problem = PR_1_EXTENT_HEADER_INVALID;
3377                                 if (!next_try_repairs)
3378                                         return;
3379                                 if (pctx->errcode == EXT2_ET_EXTENT_HEADER_BAD)
3380                                         goto report_problem;
3381                                 return;
3382                         }
3383                         /* The next extent should match this index's logical start */
3384                         if (extent.e_lblk != lblk) {
3385                                 struct ext2_extent_info e_info;
3386
3387                                 pctx->errcode = ext2fs_extent_get_info(ehandle,
3388                                                                        &e_info);
3389                                 if (pctx->errcode) {
3390                                         pctx->str = "ext2fs_extent_get_info";
3391                                         return;
3392                                 }
3393                                 pctx->blk = lblk;
3394                                 pctx->blk2 = extent.e_lblk;
3395                                 pctx->num = e_info.curr_level - 1;
3396                                 problem = PR_1_EXTENT_INDEX_START_INVALID;
3397                                 if (fix_problem(ctx, problem, pctx)) {
3398                                         pb->inode_modified = 1;
3399                                         pctx->errcode =
3400                                                 ext2fs_extent_fix_parents(ehandle);
3401                                         if (pctx->errcode) {
3402                                                 pctx->str = "ext2fs_extent_fix_parents";
3403                                                 return;
3404                                         }
3405                                 }
3406                         }
3407                         scan_extent_node(ctx, pctx, pb, extent.e_lblk,
3408                                          last_lblk, eof_block, ehandle,
3409                                          next_try_repairs);
3410                         if (pctx->errcode)
3411                                 return;
3412                         pctx->errcode = ext2fs_extent_get(ehandle,
3413                                                   EXT2_EXTENT_UP, &extent);
3414                         if (pctx->errcode) {
3415                                 pctx->str = "EXT2_EXTENT_UP";
3416                                 return;
3417                         }
3418                         mark_block_used(ctx, blk);
3419                         pb->num_blocks++;
3420                         goto next;
3421                 }
3422
3423                 if ((pb->previous_block != 0) &&
3424                     (pb->previous_block+1 != extent.e_pblk)) {
3425                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3426                                 char type = '?';
3427
3428                                 if (pb->is_dir)
3429                                         type = 'd';
3430                                 else if (pb->is_reg)
3431                                         type = 'f';
3432
3433                                 printf(("%6lu(%c): expecting %6lu "
3434                                         "actual extent "
3435                                         "phys %6lu log %lu len %lu\n"),
3436                                        (unsigned long) pctx->ino, type,
3437                                        (unsigned long) pb->previous_block+1,
3438                                        (unsigned long) extent.e_pblk,
3439                                        (unsigned long) extent.e_lblk,
3440                                        (unsigned long) extent.e_len);
3441                         }
3442                         pb->fragmented = 1;
3443                 }
3444                 /*
3445                  * If we notice a gap in the logical block mappings of an
3446                  * extent-mapped directory, offer to close the hole by
3447                  * moving the logical block down, otherwise we'll go mad in
3448                  * pass 3 allocating empty directory blocks to fill the hole.
3449                  */
3450                 if (try_repairs && is_dir &&
3451                     pb->last_block + 1 < extent.e_lblk) {
3452                         blk64_t new_lblk;
3453
3454                         new_lblk = pb->last_block + 1;
3455                         if (EXT2FS_CLUSTER_RATIO(ctx->fs) > 1)
3456                                 new_lblk = ((new_lblk +
3457                                              EXT2FS_CLUSTER_RATIO(ctx->fs) - 1) &
3458                                             ~EXT2FS_CLUSTER_MASK(ctx->fs)) |
3459                                            (extent.e_pblk &
3460                                             EXT2FS_CLUSTER_MASK(ctx->fs));
3461                         pctx->blk = extent.e_lblk;
3462                         pctx->blk2 = new_lblk;
3463                         if (fix_problem(ctx, PR_1_COLLAPSE_DBLOCK, pctx)) {
3464                                 extent.e_lblk = new_lblk;
3465                                 pb->inode_modified = 1;
3466                                 pctx->errcode = ext2fs_extent_replace(ehandle,
3467                                                                 0, &extent);
3468                                 if (pctx->errcode) {
3469                                         pctx->errcode = 0;
3470                                         goto alloc_later;
3471                                 }
3472                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3473                                 if (pctx->errcode)
3474                                         goto failed_add_dir_block;
3475                                 pctx->errcode = ext2fs_extent_goto(ehandle,
3476                                                                 extent.e_lblk);
3477                                 if (pctx->errcode)
3478                                         goto failed_add_dir_block;
3479                                 last_lblk = extent.e_lblk + extent.e_len - 1;
3480                                 failed_csum = 0;
3481                         }
3482                 }
3483 alloc_later:
3484                 if (is_dir) {
3485                         while (++pb->last_db_block <
3486                                (e2_blkcnt_t) extent.e_lblk) {
3487                                 pctx->errcode = ext2fs_add_dir_block2(
3488                                                         ctx->fs->dblist,
3489                                                         pb->ino, 0,
3490                                                         pb->last_db_block);
3491                                 if (pctx->errcode) {
3492                                         pctx->blk = 0;
3493                                         pctx->num = pb->last_db_block;
3494                                         goto failed_add_dir_block;
3495                                 }
3496                         }
3497
3498                         for (i = 0; i < extent.e_len; i++) {
3499                                 pctx->errcode = ext2fs_add_dir_block2(
3500                                                         ctx->fs->dblist,
3501                                                         pctx->ino,
3502                                                         extent.e_pblk + i,
3503                                                         extent.e_lblk + i);
3504                                 if (pctx->errcode) {
3505                                         pctx->blk = extent.e_pblk + i;
3506                                         pctx->num = extent.e_lblk + i;
3507                                 failed_add_dir_block:
3508                                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3509                                         /* Should never get here */
3510                                         ctx->flags |= E2F_FLAG_ABORT;
3511                                         return;
3512                                 }
3513                         }
3514                         if (extent.e_len > 0)
3515                                 pb->last_db_block = extent.e_lblk + extent.e_len - 1;
3516                 }
3517                 if (has_unaligned_cluster_map(ctx, pb->previous_block,
3518                                               pb->last_block,
3519                                               extent.e_pblk,
3520                                               extent.e_lblk)) {
3521                         for (i = 0; i < extent.e_len; i++) {
3522                                 pctx->blk = extent.e_lblk + i;
3523                                 pctx->blk2 = extent.e_pblk + i;
3524                                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3525                                 mark_block_used(ctx, extent.e_pblk + i);
3526                                 mark_block_used(ctx, extent.e_pblk + i);
3527                         }
3528                 }
3529
3530                 /*
3531                  * Check whether first cluster got marked in previous iteration.
3532                  */
3533                 if (ctx->fs->cluster_ratio_bits &&
3534                     pb->previous_block &&
3535                     (EXT2FS_B2C(ctx->fs, extent.e_pblk) ==
3536                      EXT2FS_B2C(ctx->fs, pb->previous_block)))
3537                         /* Set blk to the beginning of next cluster. */
3538                         blk = EXT2FS_C2B(
3539                                 ctx->fs,
3540                                 EXT2FS_B2C(ctx->fs, extent.e_pblk) + 1);
3541                 else
3542                         /* Set blk to the beginning of current cluster. */
3543                         blk = EXT2FS_C2B(ctx->fs,
3544                                          EXT2FS_B2C(ctx->fs, extent.e_pblk));
3545
3546                 if (blk < extent.e_pblk + extent.e_len) {
3547                         mark_blocks_used(ctx, blk,
3548                                          extent.e_pblk + extent.e_len - blk);
3549                         n = DIV_ROUND_UP(extent.e_pblk + extent.e_len - blk,
3550                                          EXT2FS_CLUSTER_RATIO(ctx->fs));
3551                         pb->num_blocks += n;
3552                 }
3553                 pb->last_block = extent.e_lblk + extent.e_len - 1;
3554                 pb->previous_block = extent.e_pblk + extent.e_len - 1;
3555                 start_block = pb->last_block = last_lblk;
3556                 if (is_leaf && !is_dir &&
3557                     !(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT))
3558                         pb->last_init_lblock = last_lblk;
3559         next:
3560                 pctx->errcode = ext2fs_extent_get(ehandle,
3561                                                   EXT2_EXTENT_NEXT_SIB,
3562                                                   &extent);
3563         }
3564
3565         /* Failed csum but passes checks?  Ask to fix checksum. */
3566         if (failed_csum &&
3567             fix_problem(ctx, PR_1_EXTENT_ONLY_CSUM_INVALID, pctx)) {
3568                 pb->inode_modified = 1;
3569                 pctx->errcode = ext2fs_extent_replace(ehandle, 0, &extent);
3570                 if (pctx->errcode)
3571                         return;
3572         }
3573
3574         if (pctx->errcode == EXT2_ET_EXTENT_NO_NEXT)
3575                 pctx->errcode = 0;
3576 }
3577
3578 static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx,
3579                                  struct process_block_struct *pb)
3580 {
3581         struct ext2_extent_info info;
3582         struct ext2_inode       *inode = pctx->inode;
3583         ext2_extent_handle_t    ehandle;
3584         ext2_filsys             fs = ctx->fs;
3585         ext2_ino_t              ino = pctx->ino;
3586         errcode_t               retval;
3587         blk64_t                 eof_lblk;
3588         struct ext3_extent_header       *eh;
3589
3590         /* Check for a proper extent header... */
3591         eh = (struct ext3_extent_header *) &inode->i_block[0];
3592         retval = ext2fs_extent_header_verify(eh, sizeof(inode->i_block));
3593         if (retval) {
3594                 if (fix_problem(ctx, PR_1_MISSING_EXTENT_HEADER, pctx))
3595                         e2fsck_clear_inode(ctx, ino, inode, 0,
3596                                            "check_blocks_extents");
3597                 pctx->errcode = 0;
3598                 return;
3599         }
3600
3601         /* ...since this function doesn't fail if i_block is zeroed. */
3602         pctx->errcode = ext2fs_extent_open2(fs, ino, inode, &ehandle);
3603         if (pctx->errcode) {
3604                 if (fix_problem(ctx, PR_1_READ_EXTENT, pctx))
3605                         e2fsck_clear_inode(ctx, ino, inode, 0,
3606                                            "check_blocks_extents");
3607                 pctx->errcode = 0;
3608                 return;
3609         }
3610
3611         retval = ext2fs_extent_get_info(ehandle, &info);
3612         if (retval == 0) {
3613                 int max_depth = info.max_depth;
3614
3615                 if (max_depth >= MAX_EXTENT_DEPTH_COUNT)
3616                         max_depth = MAX_EXTENT_DEPTH_COUNT-1;
3617                 ctx->extent_depth_count[max_depth]++;
3618         }
3619
3620         /* Check maximum extent depth */
3621         pctx->blk = info.max_depth;
3622         pctx->blk2 = ext2fs_max_extent_depth(ehandle);
3623         if (pctx->blk2 < pctx->blk &&
3624             fix_problem(ctx, PR_1_EXTENT_BAD_MAX_DEPTH, pctx))
3625                 pb->eti.force_rebuild = 1;
3626
3627         /* Can we collect extent tree level stats? */
3628         pctx->blk = MAX_EXTENT_DEPTH_COUNT;
3629         if (pctx->blk2 > pctx->blk)
3630                 fix_problem(ctx, PR_1E_MAX_EXTENT_TREE_DEPTH, pctx);
3631         memset(pb->eti.ext_info, 0, sizeof(pb->eti.ext_info));
3632         pb->eti.ino = pb->ino;
3633
3634         pb->next_lblock = 0;
3635
3636         eof_lblk = ((EXT2_I_SIZE(inode) + fs->blocksize - 1) >>
3637                 EXT2_BLOCK_SIZE_BITS(fs->super)) - 1;
3638         scan_extent_node(ctx, pctx, pb, 0, 0, eof_lblk, ehandle, 1);
3639         if (pctx->errcode &&
3640             fix_problem(ctx, PR_1_EXTENT_ITERATE_FAILURE, pctx)) {
3641                 pb->num_blocks = 0;
3642                 inode->i_blocks = 0;
3643                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3644                                    "check_blocks_extents");
3645                 pctx->errcode = 0;
3646         }
3647         ext2fs_extent_free(ehandle);
3648
3649         /* Rebuild unless it's a dir and we're rehashing it */
3650         if (LINUX_S_ISDIR(inode->i_mode) &&
3651             e2fsck_dir_will_be_rehashed(ctx, ino))
3652                 return;
3653
3654         if (ctx->options & E2F_OPT_CONVERT_BMAP)
3655                 e2fsck_rebuild_extents_later(ctx, ino);
3656         else
3657                 e2fsck_should_rebuild_extents(ctx, pctx, &pb->eti, &info);
3658 }
3659
3660 /*
3661  * In fact we don't need to check blocks for an inode with inline data
3662  * because this inode doesn't have any blocks.  In this function all
3663  * we need to do is add this inode into dblist when it is a directory.
3664  */
3665 static void check_blocks_inline_data(e2fsck_t ctx, struct problem_context *pctx,
3666                                      struct process_block_struct *pb)
3667 {
3668         int     flags;
3669         size_t  inline_data_size = 0;
3670
3671         if (!pb->is_dir) {
3672                 pctx->errcode = 0;
3673                 return;
3674         }
3675
3676         /* Process the dirents in i_block[] as the "first" block. */
3677         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 0);
3678         if (pctx->errcode)
3679                 goto err;
3680
3681         /* Process the dirents in the EA as a "second" block. */
3682         flags = ctx->fs->flags;
3683         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3684         pctx->errcode = ext2fs_inline_data_size(ctx->fs, pb->ino,
3685                                                 &inline_data_size);
3686         ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3687                          (ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3688         if (pctx->errcode) {
3689                 pctx->errcode = 0;
3690                 return;
3691         }
3692
3693         if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE)
3694                 return;
3695
3696         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 1);
3697         if (pctx->errcode)
3698                 goto err;
3699
3700         return;
3701 err:
3702         pctx->blk = 0;
3703         pctx->num = 0;
3704         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3705         ctx->flags |= E2F_FLAG_ABORT;
3706 }
3707
3708 /*
3709  * This subroutine is called on each inode to account for all of the
3710  * blocks used by that inode.
3711  */
3712 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
3713                          char *block_buf, const struct ea_quota *ea_ibody_quota)
3714 {
3715         ext2_filsys fs = ctx->fs;
3716         struct process_block_struct pb;
3717         ext2_ino_t      ino = pctx->ino;
3718         struct ext2_inode *inode = pctx->inode;
3719         unsigned        bad_size = 0;
3720         int             dirty_inode = 0;
3721         int             extent_fs;
3722         int             inlinedata_fs;
3723         __u64           size;
3724         struct ea_quota ea_block_quota;
3725
3726         pb.ino = ino;
3727         pb.num_blocks = EXT2FS_B2C(ctx->fs,
3728                                    ea_ibody_quota ? ea_ibody_quota->blocks : 0);
3729         pb.last_block = ~0;
3730         pb.last_init_lblock = -1;
3731         pb.last_db_block = -1;
3732         pb.num_illegal_blocks = 0;
3733         pb.suppress = 0; pb.clear = 0;
3734         pb.fragmented = 0;
3735         pb.compressed = 0;
3736         pb.previous_block = 0;
3737         pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
3738         pb.is_reg = LINUX_S_ISREG(inode->i_mode);
3739         pb.max_blocks = 1U << (31 - fs->super->s_log_block_size);
3740         pb.inode = inode;
3741         pb.pctx = pctx;
3742         pb.ctx = ctx;
3743         pb.inode_modified = 0;
3744         pb.eti.force_rebuild = 0;
3745         pctx->ino = ino;
3746         pctx->errcode = 0;
3747
3748         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
3749         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
3750
3751         if (check_ext_attr(ctx, pctx, block_buf, &ea_block_quota)) {
3752                 if (e2fsck_should_abort(ctx))
3753                         goto out;
3754                 pb.num_blocks += EXT2FS_B2C(ctx->fs, ea_block_quota.blocks);
3755         }
3756
3757         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL))
3758                 check_blocks_inline_data(ctx, pctx, &pb);
3759         else if (ext2fs_inode_has_valid_blocks2(fs, inode)) {
3760                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL))
3761                         check_blocks_extents(ctx, pctx, &pb);
3762                 else {
3763                         int flags;
3764                         /*
3765                          * If we've modified the inode, write it out before
3766                          * iterate() tries to use it.
3767                          */
3768                         if (dirty_inode) {
3769                                 e2fsck_write_inode(ctx, ino, inode,
3770                                                    "check_blocks");
3771                                 dirty_inode = 0;
3772                         }
3773                         flags = fs->flags;
3774                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3775                         pctx->errcode = ext2fs_block_iterate3(fs, ino,
3776                                                 pb.is_dir ? BLOCK_FLAG_HOLE : 0,
3777                                                 block_buf, process_block, &pb);
3778                         /*
3779                          * We do not have uninitialized extents in non extent
3780                          * files.
3781                          */
3782                         pb.last_init_lblock = pb.last_block;
3783                         /*
3784                          * If iterate() changed a block mapping, we have to
3785                          * re-read the inode.  If we decide to clear the
3786                          * inode after clearing some stuff, we'll re-write the
3787                          * bad mappings into the inode!
3788                          */
3789                         if (pb.inode_modified)
3790                                 e2fsck_read_inode(ctx, ino, inode,
3791                                                   "check_blocks");
3792                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3793                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3794
3795                         if (ctx->options & E2F_OPT_CONVERT_BMAP) {
3796 #ifdef DEBUG
3797                                 printf("bmap rebuild ino=%d\n", ino);
3798 #endif
3799                                 if (!LINUX_S_ISDIR(inode->i_mode) ||
3800                                     !e2fsck_dir_will_be_rehashed(ctx, ino))
3801                                         e2fsck_rebuild_extents_later(ctx, ino);
3802                         }
3803                 }
3804         }
3805         end_problem_latch(ctx, PR_LATCH_BLOCK);
3806         end_problem_latch(ctx, PR_LATCH_TOOBIG);
3807         if (e2fsck_should_abort(ctx))
3808                 goto out;
3809         if (pctx->errcode)
3810                 fix_problem(ctx, PR_1_BLOCK_ITERATE, pctx);
3811
3812         if (pb.fragmented && pb.num_blocks < fs->super->s_blocks_per_group) {
3813                 if (LINUX_S_ISDIR(inode->i_mode))
3814                         ctx->fs_fragmented_dir++;
3815                 else
3816                         ctx->fs_fragmented++;
3817         }
3818
3819         if (pb.clear) {
3820                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3821                                    "check_blocks");
3822                 return;
3823         }
3824
3825         if (inode->i_flags & EXT2_INDEX_FL) {
3826                 if (handle_htree(ctx, pctx, ino, inode, block_buf)) {
3827                         inode->i_flags &= ~EXT2_INDEX_FL;
3828                         dirty_inode++;
3829                 } else {
3830                         e2fsck_add_dx_dir(ctx, ino, inode, pb.last_block+1);
3831                 }
3832         }
3833
3834         if (!pb.num_blocks && pb.is_dir &&
3835             !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
3836                 if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) {
3837                         e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks");
3838                         ctx->fs_directory_count--;
3839                         return;
3840                 }
3841         }
3842
3843         if (ino != quota_type2inum(PRJQUOTA, fs->super) &&
3844             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super)) &&
3845             !(inode->i_flags & EXT4_EA_INODE_FL)) {
3846                 quota_data_add(ctx->qctx, (struct ext2_inode_large *) inode,
3847                                ino,
3848                                pb.num_blocks * EXT2_CLUSTER_SIZE(fs->super));
3849                 quota_data_inodes(ctx->qctx, (struct ext2_inode_large *) inode,
3850                                   ino, (ea_ibody_quota ?
3851                                         ea_ibody_quota->inodes : 0) +
3852                                                 ea_block_quota.inodes + 1);
3853         }
3854
3855         if (!ext2fs_has_feature_huge_file(fs->super) ||
3856             !(inode->i_flags & EXT4_HUGE_FILE_FL))
3857                 pb.num_blocks *= (fs->blocksize / 512);
3858         pb.num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
3859 #if 0
3860         printf("inode %u, i_size = %u, last_block = %llu, i_blocks=%llu, num_blocks = %llu\n",
3861                ino, inode->i_size, (unsigned long long) pb.last_block,
3862                (unsigned long long) ext2fs_inode_i_blocks(fs, inode),
3863                (unsigned long long) pb.num_blocks);
3864 #endif
3865         size = EXT2_I_SIZE(inode);
3866         if (pb.is_dir) {
3867                 unsigned nblock = size >> EXT2_BLOCK_SIZE_BITS(fs->super);
3868                 if (inode->i_flags & EXT4_INLINE_DATA_FL) {
3869                         int flags;
3870                         size_t sz = 0;
3871                         errcode_t err;
3872
3873                         flags = ctx->fs->flags;
3874                         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3875                         err = ext2fs_inline_data_size(ctx->fs, pctx->ino,
3876                                                       &sz);
3877                         ctx->fs->flags = (flags &
3878                                           EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3879                                          (ctx->fs->flags &
3880                                           ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3881                         if (err || sz != size) {
3882                                 bad_size = 7;
3883                                 pctx->num = sz;
3884                         }
3885                 } else if (size & (fs->blocksize - 1))
3886                         bad_size = 5;
3887                 else if (nblock > (pb.last_block + 1))
3888                         bad_size = 1;
3889                 else if (nblock < (pb.last_block + 1)) {
3890                         if (((pb.last_block + 1) - nblock) >
3891                             fs->super->s_prealloc_dir_blocks)
3892                                 bad_size = 2;
3893                 }
3894         } else {
3895                 if ((pb.last_init_lblock >= 0) &&
3896                     /* Do not allow initialized allocated blocks past i_size*/
3897                     (size < (__u64)pb.last_init_lblock * fs->blocksize) &&
3898                     !(inode->i_flags & EXT4_VERITY_FL))
3899                         bad_size = 3;
3900                 else if (!(extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3901                          size > ext2_max_sizes[fs->super->s_log_block_size])
3902                         /* too big for a direct/indirect-mapped file */
3903                         bad_size = 4;
3904                 else if ((extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3905                          size >
3906                          ((1ULL << (32 + EXT2_BLOCK_SIZE_BITS(fs->super))) - 1))
3907                         /* too big for an extent-based file - 32bit ee_block */
3908                         bad_size = 6;
3909         }
3910         /* i_size for symlinks is checked elsewhere */
3911         if (bad_size && !LINUX_S_ISLNK(inode->i_mode)) {
3912                 /* Did inline_data set pctx->num earlier? */
3913                 if (bad_size != 7)
3914                         pctx->num = (pb.last_block + 1) * fs->blocksize;
3915                 pctx->group = bad_size;
3916                 if (fix_problem(ctx, PR_1_BAD_I_SIZE, pctx)) {
3917                         ext2fs_inode_size_set(fs, inode, pctx->num);
3918                         if (EXT2_I_SIZE(inode) == 0 &&
3919                             (inode->i_flags & EXT4_INLINE_DATA_FL)) {
3920                                 memset(inode->i_block, 0,
3921                                        sizeof(inode->i_block));
3922                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
3923                         }
3924                         dirty_inode++;
3925                 }
3926                 pctx->num = 0;
3927         }
3928         if (LINUX_S_ISREG(inode->i_mode) &&
3929             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
3930                 ctx->large_files++;
3931         if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
3932             ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) ||
3933              (ext2fs_has_feature_huge_file(fs->super) &&
3934               (inode->i_flags & EXT4_HUGE_FILE_FL) &&
3935               (inode->osd2.linux2.l_i_blocks_hi != 0)))) {
3936                 pctx->num = pb.num_blocks;
3937                 if (fix_problem(ctx, PR_1_BAD_I_BLOCKS, pctx)) {
3938                         inode->i_blocks = pb.num_blocks;
3939                         inode->osd2.linux2.l_i_blocks_hi = pb.num_blocks >> 32;
3940                         dirty_inode++;
3941                 }
3942                 pctx->num = 0;
3943         }
3944
3945         /*
3946          * The kernel gets mad if we ask it to allocate bigalloc clusters to
3947          * a block mapped file, so rebuild it as an extent file.  We can skip
3948          * symlinks because they're never rewritten.
3949          */
3950         if (ext2fs_has_feature_bigalloc(fs->super) &&
3951             (LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode)) &&
3952             ext2fs_inode_data_blocks2(fs, inode) > 0 &&
3953             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INO(fs->super)) &&
3954             !(inode->i_flags & (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)) &&
3955             fix_problem(ctx, PR_1_NO_BIGALLOC_BLOCKMAP_FILES, pctx)) {
3956                 pctx->errcode = e2fsck_rebuild_extents_later(ctx, ino);
3957                 if (pctx->errcode)
3958                         goto out;
3959         }
3960
3961         if (ctx->dirs_to_hash && pb.is_dir &&
3962             !(ctx->lost_and_found && ctx->lost_and_found == ino) &&
3963             !(inode->i_flags & EXT2_INDEX_FL) &&
3964             ((inode->i_size / fs->blocksize) >= 3))
3965                 e2fsck_rehash_dir_later(ctx, ino);
3966
3967 out:
3968         if (dirty_inode)
3969                 e2fsck_write_inode(ctx, ino, inode, "check_blocks");
3970 }
3971
3972 #if 0
3973 /*
3974  * Helper function called by process block when an illegal block is
3975  * found.  It returns a description about why the block is illegal
3976  */
3977 static char *describe_illegal_block(ext2_filsys fs, blk64_t block)
3978 {
3979         blk64_t super;
3980         int     i;
3981         static char     problem[80];
3982
3983         super = fs->super->s_first_data_block;
3984         strcpy(problem, "PROGRAMMING ERROR: Unknown reason for illegal block");
3985         if (block < super) {
3986                 sprintf(problem, "< FIRSTBLOCK (%u)", super);
3987                 return(problem);
3988         } else if (block >= ext2fs_blocks_count(fs->super)) {
3989                 sprintf(problem, "> BLOCKS (%u)", ext2fs_blocks_count(fs->super));
3990                 return(problem);
3991         }
3992         for (i = 0; i < fs->group_desc_count; i++) {
3993                 if (block == super) {
3994                         sprintf(problem, "is the superblock in group %d", i);
3995                         break;
3996                 }
3997                 if (block > super &&
3998                     block <= (super + fs->desc_blocks)) {
3999                         sprintf(problem, "is in the group descriptors "
4000                                 "of group %d", i);
4001                         break;
4002                 }
4003                 if (block == ext2fs_block_bitmap_loc(fs, i)) {
4004                         sprintf(problem, "is the block bitmap of group %d", i);
4005                         break;
4006                 }
4007                 if (block == ext2fs_inode_bitmap_loc(fs, i)) {
4008                         sprintf(problem, "is the inode bitmap of group %d", i);
4009                         break;
4010                 }
4011                 if (block >= ext2fs_inode_table_loc(fs, i) &&
4012                     (block < ext2fs_inode_table_loc(fs, i)
4013                      + fs->inode_blocks_per_group)) {
4014                         sprintf(problem, "is in the inode table of group %d",
4015                                 i);
4016                         break;
4017                 }
4018                 super += fs->super->s_blocks_per_group;
4019         }
4020         return(problem);
4021 }
4022 #endif
4023
4024 /*
4025  * This is a helper function for check_blocks().
4026  */
4027 static int process_block(ext2_filsys fs,
4028                   blk64_t       *block_nr,
4029                   e2_blkcnt_t blockcnt,
4030                   blk64_t ref_block EXT2FS_ATTR((unused)),
4031                   int ref_offset EXT2FS_ATTR((unused)),
4032                   void *priv_data)
4033 {
4034         struct process_block_struct *p;
4035         struct problem_context *pctx;
4036         blk64_t blk = *block_nr;
4037         int     ret_code = 0;
4038         problem_t       problem = 0;
4039         e2fsck_t        ctx;
4040
4041         p = (struct process_block_struct *) priv_data;
4042         pctx = p->pctx;
4043         ctx = p->ctx;
4044
4045         /*
4046          * For a directory, add logical block zero for processing even if it's
4047          * not mapped or we'll be perennially stuck with broken "." and ".."
4048          * entries.
4049          */
4050         if (p->is_dir && blockcnt == 0 && blk == 0) {
4051                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino, 0, 0);
4052                 if (pctx->errcode) {
4053                         pctx->blk = blk;
4054                         pctx->num = blockcnt;
4055                         goto failed_add_dir_block;
4056                 }
4057                 p->last_db_block++;
4058         }
4059
4060         if (blk == 0)
4061                 return 0;
4062
4063 #if 0
4064         printf("Process_block, inode %lu, block %u, #%d\n", p->ino, blk,
4065                blockcnt);
4066 #endif
4067
4068         /*
4069          * Simplistic fragmentation check.  We merely require that the
4070          * file be contiguous.  (Which can never be true for really
4071          * big files that are greater than a block group.)
4072          */
4073         if (p->previous_block && p->ino != EXT2_RESIZE_INO) {
4074                 if (p->previous_block+1 != blk) {
4075                         if (ctx->options & E2F_OPT_FRAGCHECK) {
4076                                 char type = '?';
4077
4078                                 if (p->is_dir)
4079                                         type = 'd';
4080                                 else if (p->is_reg)
4081                                         type = 'f';
4082
4083                                 printf(_("%6lu(%c): expecting %6lu "
4084                                          "got phys %6lu (blkcnt %lld)\n"),
4085                                        (unsigned long) pctx->ino, type,
4086                                        (unsigned long) p->previous_block+1,
4087                                        (unsigned long) blk,
4088                                        (long long) blockcnt);
4089                         }
4090                         p->fragmented = 1;
4091                 }
4092         }
4093
4094         if (p->is_dir && !ext2fs_has_feature_largedir(fs->super) &&
4095             !pctx->inode->i_size_high &&
4096             blockcnt > (1 << (21 - fs->super->s_log_block_size)))
4097                 problem = PR_1_TOOBIG_DIR;
4098         if (p->is_dir && p->num_blocks + 1 >= p->max_blocks)
4099                 problem = PR_1_TOOBIG_DIR;
4100         if (p->is_reg && p->num_blocks + 1 >= p->max_blocks)
4101                 problem = PR_1_TOOBIG_REG;
4102         if (!p->is_dir && !p->is_reg && blockcnt > 0)
4103                 problem = PR_1_TOOBIG_SYMLINK;
4104
4105         if (blk < fs->super->s_first_data_block ||
4106             blk >= ext2fs_blocks_count(fs->super))
4107                 problem = PR_1_ILLEGAL_BLOCK_NUM;
4108
4109         /*
4110          * If this IND/DIND/TIND block is squatting atop some critical metadata
4111          * (group descriptors, superblock, bitmap, inode table), any write to
4112          * "fix" mapping problems will destroy the metadata.  We'll let pass 1b
4113          * fix that and restart fsck.
4114          */
4115         if (blockcnt < 0 &&
4116             p->ino != EXT2_RESIZE_INO &&
4117             blk < ctx->fs->super->s_blocks_count &&
4118             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk)) {
4119                 pctx->blk = blk;
4120                 fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx);
4121                 if ((ctx->options & E2F_OPT_NO) == 0)
4122                         ctx->flags |= E2F_FLAG_RESTART_LATER;
4123         }
4124
4125         if (problem) {
4126                 p->num_illegal_blocks++;
4127                 /*
4128                  * A bit of subterfuge here -- we're trying to fix a block
4129                  * mapping, but the IND/DIND/TIND block could have collided
4130                  * with some critical metadata.  So, fix the in-core mapping so
4131                  * iterate won't go insane, but return 0 instead of
4132                  * BLOCK_CHANGED so that it won't write the remapping out to
4133                  * our multiply linked block.
4134                  *
4135                  * Even if we previously determined that an *IND block
4136                  * conflicts with critical metadata, we must still try to
4137                  * iterate the *IND block as if it is an *IND block to find and
4138                  * mark the blocks it points to.  Better to be overly cautious
4139                  * with the used_blocks map so that we don't move the *IND
4140                  * block to a block that's really in use!
4141                  */
4142                 if (p->ino != EXT2_RESIZE_INO &&
4143                     ref_block != 0 &&
4144                     ext2fs_test_block_bitmap2(ctx->block_metadata_map,
4145                                               ref_block)) {
4146                         *block_nr = 0;
4147                         return 0;
4148                 }
4149                 if (!p->suppress && (p->num_illegal_blocks % 12) == 0) {
4150                         if (fix_problem(ctx, PR_1_TOO_MANY_BAD_BLOCKS, pctx)) {
4151                                 p->clear = 1;
4152                                 return BLOCK_ABORT;
4153                         }
4154                         if (fix_problem(ctx, PR_1_SUPPRESS_MESSAGES, pctx)) {
4155                                 p->suppress = 1;
4156                                 set_latch_flags(PR_LATCH_BLOCK,
4157                                                 PRL_SUPPRESS, 0);
4158                         }
4159                 }
4160                 pctx->blk = blk;
4161                 pctx->blkcount = blockcnt;
4162                 if (fix_problem(ctx, problem, pctx)) {
4163                         blk = *block_nr = 0;
4164                         ret_code = BLOCK_CHANGED;
4165                         p->inode_modified = 1;
4166                         /*
4167                          * If the directory block is too big and is beyond the
4168                          * end of the FS, don't bother trying to add it for
4169                          * processing -- the kernel would never have created a
4170                          * directory this large, and we risk an ENOMEM abort.
4171                          * In any case, the toobig handler for extent-based
4172                          * directories also doesn't feed toobig blocks to
4173                          * pass 2.
4174                          */
4175                         if (problem == PR_1_TOOBIG_DIR)
4176                                 return ret_code;
4177                         goto mark_dir;
4178                 } else
4179                         return 0;
4180         }
4181
4182         if (p->ino == EXT2_RESIZE_INO) {
4183                 /*
4184                  * The resize inode has already be sanity checked
4185                  * during pass #0 (the superblock checks).  All we
4186                  * have to do is mark the double indirect block as
4187                  * being in use; all of the other blocks are handled
4188                  * by mark_table_blocks()).
4189                  */
4190                 if (blockcnt == BLOCK_COUNT_DIND)
4191                         mark_block_used(ctx, blk);
4192                 p->num_blocks++;
4193         } else if (!(ctx->fs->cluster_ratio_bits &&
4194                      p->previous_block &&
4195                      (EXT2FS_B2C(ctx->fs, blk) ==
4196                       EXT2FS_B2C(ctx->fs, p->previous_block)) &&
4197                      (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
4198                      ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
4199                 mark_block_used(ctx, blk);
4200                 p->num_blocks++;
4201         } else if (has_unaligned_cluster_map(ctx, p->previous_block,
4202                                              p->last_block, blk, blockcnt)) {
4203                 pctx->blk = blockcnt;
4204                 pctx->blk2 = blk;
4205                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
4206                 mark_block_used(ctx, blk);
4207                 mark_block_used(ctx, blk);
4208         }
4209         if (blockcnt >= 0)
4210                 p->last_block = blockcnt;
4211         p->previous_block = blk;
4212 mark_dir:
4213         if (p->is_dir && (blockcnt >= 0)) {
4214                 while (++p->last_db_block < blockcnt) {
4215                         pctx->errcode = ext2fs_add_dir_block2(fs->dblist,
4216                                                               p->ino, 0,
4217                                                               p->last_db_block);
4218                         if (pctx->errcode) {
4219                                 pctx->blk = 0;
4220                                 pctx->num = p->last_db_block;
4221                                 goto failed_add_dir_block;
4222                         }
4223                 }
4224                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino,
4225                                                       blk, blockcnt);
4226                 if (pctx->errcode) {
4227                         pctx->blk = blk;
4228                         pctx->num = blockcnt;
4229                 failed_add_dir_block:
4230                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
4231                         /* Should never get here */
4232                         ctx->flags |= E2F_FLAG_ABORT;
4233                         return BLOCK_ABORT;
4234                 }
4235         }
4236         return ret_code;
4237 }
4238
4239 static int process_bad_block(ext2_filsys fs,
4240                       blk64_t *block_nr,
4241                       e2_blkcnt_t blockcnt,
4242                       blk64_t ref_block EXT2FS_ATTR((unused)),
4243                       int ref_offset EXT2FS_ATTR((unused)),
4244                       void *priv_data)
4245 {
4246         struct process_block_struct *p;
4247         blk64_t         blk = *block_nr;
4248         blk64_t         first_block;
4249         dgrp_t          i;
4250         struct problem_context *pctx;
4251         e2fsck_t        ctx;
4252
4253         if (!blk)
4254                 return 0;
4255
4256         p = (struct process_block_struct *) priv_data;
4257         ctx = p->ctx;
4258         pctx = p->pctx;
4259
4260         pctx->ino = EXT2_BAD_INO;
4261         pctx->blk = blk;
4262         pctx->blkcount = blockcnt;
4263
4264         if ((blk < fs->super->s_first_data_block) ||
4265             (blk >= ext2fs_blocks_count(fs->super))) {
4266                 if (fix_problem(ctx, PR_1_BB_ILLEGAL_BLOCK_NUM, pctx)) {
4267                         *block_nr = 0;
4268                         return BLOCK_CHANGED;
4269                 } else
4270                         return 0;
4271         }
4272
4273         if (blockcnt < 0) {
4274                 if (ext2fs_test_block_bitmap2(p->fs_meta_blocks, blk)) {
4275                         p->bbcheck = 1;
4276                         if (fix_problem(ctx, PR_1_BB_FS_BLOCK, pctx)) {
4277                                 *block_nr = 0;
4278                                 return BLOCK_CHANGED;
4279                         }
4280                 } else if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4281                                                     blk)) {
4282                         p->bbcheck = 1;
4283                         if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK,
4284                                         pctx)) {
4285                                 *block_nr = 0;
4286                                 return BLOCK_CHANGED;
4287                         }
4288                         if (e2fsck_should_abort(ctx))
4289                                 return BLOCK_ABORT;
4290                 } else
4291                         mark_block_used(ctx, blk);
4292                 return 0;
4293         }
4294 #if 0
4295         printf ("DEBUG: Marking %u as bad.\n", blk);
4296 #endif
4297         ctx->fs_badblocks_count++;
4298         /*
4299          * If the block is not used, then mark it as used and return.
4300          * If it is already marked as found, this must mean that
4301          * there's an overlap between the filesystem table blocks
4302          * (bitmaps and inode table) and the bad block list.
4303          */
4304         if (!ext2fs_test_block_bitmap2(ctx->block_found_map, blk)) {
4305                 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4306                 return 0;
4307         }
4308         /*
4309          * Try to find the where the filesystem block was used...
4310          */
4311         first_block = fs->super->s_first_data_block;
4312
4313         for (i = 0; i < fs->group_desc_count; i++ ) {
4314                 pctx->group = i;
4315                 pctx->blk = blk;
4316                 if (!ext2fs_bg_has_super(fs, i))
4317                         goto skip_super;
4318                 if (blk == first_block) {
4319                         if (i == 0) {
4320                                 if (fix_problem(ctx,
4321                                                 PR_1_BAD_PRIMARY_SUPERBLOCK,
4322                                                 pctx)) {
4323                                         *block_nr = 0;
4324                                         return BLOCK_CHANGED;
4325                                 }
4326                                 return 0;
4327                         }
4328                         fix_problem(ctx, PR_1_BAD_SUPERBLOCK, pctx);
4329                         return 0;
4330                 }
4331                 if ((blk > first_block) &&
4332                     (blk <= first_block + fs->desc_blocks)) {
4333                         if (i == 0) {
4334                                 pctx->blk = *block_nr;
4335                                 if (fix_problem(ctx,
4336                         PR_1_BAD_PRIMARY_GROUP_DESCRIPTOR, pctx)) {
4337                                         *block_nr = 0;
4338                                         return BLOCK_CHANGED;
4339                                 }
4340                                 return 0;
4341                         }
4342                         fix_problem(ctx, PR_1_BAD_GROUP_DESCRIPTORS, pctx);
4343                         return 0;
4344                 }
4345         skip_super:
4346                 if (blk == ext2fs_block_bitmap_loc(fs, i)) {
4347                         if (fix_problem(ctx, PR_1_BB_BAD_BLOCK, pctx)) {
4348                                 ctx->invalid_block_bitmap_flag[i]++;
4349                                 ctx->invalid_bitmaps++;
4350                         }
4351                         return 0;
4352                 }
4353                 if (blk == ext2fs_inode_bitmap_loc(fs, i)) {
4354                         if (fix_problem(ctx, PR_1_IB_BAD_BLOCK, pctx)) {
4355                                 ctx->invalid_inode_bitmap_flag[i]++;
4356                                 ctx->invalid_bitmaps++;
4357                         }
4358                         return 0;
4359                 }
4360                 if ((blk >= ext2fs_inode_table_loc(fs, i)) &&
4361                     (blk < (ext2fs_inode_table_loc(fs, i) +
4362                             fs->inode_blocks_per_group))) {
4363                         /*
4364                          * If there are bad blocks in the inode table,
4365                          * the inode scan code will try to do
4366                          * something reasonable automatically.
4367                          */
4368                         return 0;
4369                 }
4370                 first_block += fs->super->s_blocks_per_group;
4371         }
4372         /*
4373          * If we've gotten to this point, then the only
4374          * possibility is that the bad block inode meta data
4375          * is using a bad block.
4376          */
4377         if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) ||
4378             (blk == p->inode->i_block[EXT2_DIND_BLOCK]) ||
4379             (blk == p->inode->i_block[EXT2_TIND_BLOCK])) {
4380                 p->bbcheck = 1;
4381                 if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, pctx)) {
4382                         *block_nr = 0;
4383                         return BLOCK_CHANGED;
4384                 }
4385                 if (e2fsck_should_abort(ctx))
4386                         return BLOCK_ABORT;
4387                 return 0;
4388         }
4389
4390         pctx->group = -1;
4391
4392         /* Warn user that the block wasn't claimed */
4393         fix_problem(ctx, PR_1_PROGERR_CLAIMED_BLOCK, pctx);
4394
4395         return 0;
4396 }
4397
4398 static void new_table_block(e2fsck_t ctx, blk64_t first_block, dgrp_t group,
4399                             const char *name, int num, blk64_t *new_block)
4400 {
4401         ext2_filsys fs = ctx->fs;
4402         dgrp_t          last_grp;
4403         blk64_t         old_block = *new_block;
4404         blk64_t         last_block;
4405         dgrp_t          flexbg;
4406         unsigned        flexbg_size;
4407         int             i, is_flexbg;
4408         char            *buf;
4409         struct problem_context  pctx;
4410
4411         clear_problem_context(&pctx);
4412
4413         pctx.group = group;
4414         pctx.blk = old_block;
4415         pctx.str = name;
4416
4417         /*
4418          * For flex_bg filesystems, first try to allocate the metadata
4419          * within the flex_bg, and if that fails then try finding the
4420          * space anywhere in the filesystem.
4421          */
4422         is_flexbg = ext2fs_has_feature_flex_bg(fs->super);
4423         if (is_flexbg) {
4424                 flexbg_size = 1U << fs->super->s_log_groups_per_flex;
4425                 flexbg = group / flexbg_size;
4426                 first_block = ext2fs_group_first_block2(fs,
4427                                                         flexbg_size * flexbg);
4428                 last_grp = group | (flexbg_size - 1);
4429                 if (last_grp >= fs->group_desc_count)
4430                         last_grp = fs->group_desc_count - 1;
4431                 last_block = ext2fs_group_last_block2(fs, last_grp);
4432         } else
4433                 last_block = ext2fs_group_last_block2(fs, group);
4434         pctx.errcode = ext2fs_get_free_blocks2(fs, first_block, last_block,
4435                                                num, ctx->block_found_map,
4436                                                new_block);
4437         if (is_flexbg && (pctx.errcode == EXT2_ET_BLOCK_ALLOC_FAIL))
4438                 pctx.errcode = ext2fs_get_free_blocks2(fs,
4439                                 fs->super->s_first_data_block,
4440                                 ext2fs_blocks_count(fs->super),
4441                                 num, ctx->block_found_map, new_block);
4442         if (pctx.errcode) {
4443                 pctx.num = num;
4444                 fix_problem(ctx, PR_1_RELOC_BLOCK_ALLOCATE, &pctx);
4445                 ext2fs_unmark_valid(fs);
4446                 ctx->flags |= E2F_FLAG_ABORT;
4447                 return;
4448         }
4449         pctx.errcode = ext2fs_get_mem(fs->blocksize, &buf);
4450         if (pctx.errcode) {
4451                 fix_problem(ctx, PR_1_RELOC_MEMORY_ALLOCATE, &pctx);
4452                 ext2fs_unmark_valid(fs);
4453                 ctx->flags |= E2F_FLAG_ABORT;
4454                 return;
4455         }
4456         ext2fs_mark_super_dirty(fs);
4457         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
4458         pctx.blk2 = *new_block;
4459         fix_problem(ctx, (old_block ? PR_1_RELOC_FROM_TO :
4460                           PR_1_RELOC_TO), &pctx);
4461         pctx.blk2 = 0;
4462         for (i = 0; i < num; i++) {
4463                 pctx.blk = i;
4464                 ext2fs_mark_block_bitmap2(ctx->block_found_map, (*new_block)+i);
4465                 if (old_block) {
4466                         pctx.errcode = io_channel_read_blk64(fs->io,
4467                                    old_block + i, 1, buf);
4468                         if (pctx.errcode)
4469                                 fix_problem(ctx, PR_1_RELOC_READ_ERR, &pctx);
4470                         pctx.blk = (*new_block) + i;
4471                         pctx.errcode = io_channel_write_blk64(fs->io, pctx.blk,
4472                                                               1, buf);
4473                 } else {
4474                         pctx.blk = (*new_block) + i;
4475                         pctx.errcode = ext2fs_zero_blocks2(fs, pctx.blk, 1,
4476                                                            NULL, NULL);
4477                 }
4478
4479                 if (pctx.errcode)
4480                         fix_problem(ctx, PR_1_RELOC_WRITE_ERR, &pctx);
4481         }
4482         ext2fs_free_mem(&buf);
4483 }
4484
4485 /*
4486  * This routine gets called at the end of pass 1 if bad blocks are
4487  * detected in the superblock, group descriptors, inode_bitmaps, or
4488  * block bitmaps.  At this point, all of the blocks have been mapped
4489  * out, so we can try to allocate new block(s) to replace the bad
4490  * blocks.
4491  */
4492 static void handle_fs_bad_blocks(e2fsck_t ctx)
4493 {
4494         ext2_filsys fs = ctx->fs;
4495         dgrp_t          i;
4496         blk64_t         first_block;
4497         blk64_t         new_blk;
4498
4499         for (i = 0; i < fs->group_desc_count; i++) {
4500                 first_block = ext2fs_group_first_block2(fs, i);
4501
4502                 if (ctx->invalid_block_bitmap_flag[i]) {
4503                         new_blk = ext2fs_block_bitmap_loc(fs, i);
4504                         new_table_block(ctx, first_block, i, _("block bitmap"),
4505                                         1, &new_blk);
4506                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
4507                 }
4508                 if (ctx->invalid_inode_bitmap_flag[i]) {
4509                         new_blk = ext2fs_inode_bitmap_loc(fs, i);
4510                         new_table_block(ctx, first_block, i, _("inode bitmap"),
4511                                         1, &new_blk);
4512                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
4513                 }
4514                 if (ctx->invalid_inode_table_flag[i]) {
4515                         new_blk = ext2fs_inode_table_loc(fs, i);
4516                         new_table_block(ctx, first_block, i, _("inode table"),
4517                                         fs->inode_blocks_per_group,
4518                                         &new_blk);
4519                         ext2fs_inode_table_loc_set(fs, i, new_blk);
4520                         ctx->flags |= E2F_FLAG_RESTART;
4521                 }
4522         }
4523         ctx->invalid_bitmaps = 0;
4524 }
4525
4526 /*
4527  * This routine marks all blocks which are used by the superblock,
4528  * group descriptors, inode bitmaps, and block bitmaps.
4529  */
4530 static void mark_table_blocks(e2fsck_t ctx)
4531 {
4532         ext2_filsys fs = ctx->fs;
4533         blk64_t b;
4534         dgrp_t  i;
4535         unsigned int    j;
4536         struct problem_context pctx;
4537
4538         clear_problem_context(&pctx);
4539
4540         for (i = 0; i < fs->group_desc_count; i++) {
4541                 pctx.group = i;
4542
4543                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_found_map);
4544                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_metadata_map);
4545
4546                 /*
4547                  * Mark the blocks used for the inode table
4548                  */
4549                 if (ext2fs_inode_table_loc(fs, i)) {
4550                         for (j = 0, b = ext2fs_inode_table_loc(fs, i);
4551                              j < fs->inode_blocks_per_group;
4552                              j++, b++) {
4553                                 if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4554                                                              b)) {
4555                                         pctx.blk = b;
4556                                         if (!ctx->invalid_inode_table_flag[i] &&
4557                                             fix_problem(ctx,
4558                                                 PR_1_ITABLE_CONFLICT, &pctx)) {
4559                                                 ctx->invalid_inode_table_flag[i]++;
4560                                                 ctx->invalid_bitmaps++;
4561                                         }
4562                                 } else {
4563                                     ext2fs_mark_block_bitmap2(
4564                                                 ctx->block_found_map, b);
4565                                     ext2fs_mark_block_bitmap2(
4566                                                 ctx->block_metadata_map, b);
4567                                 }
4568                         }
4569                 }
4570
4571                 /*
4572                  * Mark block used for the block bitmap
4573                  */
4574                 if (ext2fs_block_bitmap_loc(fs, i)) {
4575                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4576                                      ext2fs_block_bitmap_loc(fs, i))) {
4577                                 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
4578                                 if (fix_problem(ctx, PR_1_BB_CONFLICT, &pctx)) {
4579                                         ctx->invalid_block_bitmap_flag[i]++;
4580                                         ctx->invalid_bitmaps++;
4581                                 }
4582                         } else {
4583                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4584                                      ext2fs_block_bitmap_loc(fs, i));
4585                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4586                                      ext2fs_block_bitmap_loc(fs, i));
4587                         }
4588                 }
4589                 /*
4590                  * Mark block used for the inode bitmap
4591                  */
4592                 if (ext2fs_inode_bitmap_loc(fs, i)) {
4593                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4594                                      ext2fs_inode_bitmap_loc(fs, i))) {
4595                                 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
4596                                 if (fix_problem(ctx, PR_1_IB_CONFLICT, &pctx)) {
4597                                         ctx->invalid_inode_bitmap_flag[i]++;
4598                                         ctx->invalid_bitmaps++;
4599                                 }
4600                         } else {
4601                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4602                                      ext2fs_inode_bitmap_loc(fs, i));
4603                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4604                                      ext2fs_inode_bitmap_loc(fs, i));
4605                         }
4606                 }
4607         }
4608 }
4609
4610 /*
4611  * These subroutines short circuits ext2fs_get_blocks and
4612  * ext2fs_check_directory; we use them since we already have the inode
4613  * structure, so there's no point in letting the ext2fs library read
4614  * the inode again.
4615  */
4616 static errcode_t pass1_get_blocks(ext2_filsys fs, ext2_ino_t ino,
4617                                   blk_t *blocks)
4618 {
4619         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4620         int     i;
4621
4622         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4623                 return EXT2_ET_CALLBACK_NOTHANDLED;
4624
4625         for (i=0; i < EXT2_N_BLOCKS; i++)
4626                 blocks[i] = ctx->stashed_inode->i_block[i];
4627         return 0;
4628 }
4629
4630 static errcode_t pass1_read_inode(ext2_filsys fs, ext2_ino_t ino,
4631                                   struct ext2_inode *inode)
4632 {
4633         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4634
4635         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4636                 return EXT2_ET_CALLBACK_NOTHANDLED;
4637         *inode = *ctx->stashed_inode;
4638         return 0;
4639 }
4640
4641 static errcode_t pass1_write_inode(ext2_filsys fs, ext2_ino_t ino,
4642                             struct ext2_inode *inode)
4643 {
4644         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4645
4646         if ((ino == ctx->stashed_ino) && ctx->stashed_inode &&
4647                 (inode != ctx->stashed_inode))
4648                 *ctx->stashed_inode = *inode;
4649         return EXT2_ET_CALLBACK_NOTHANDLED;
4650 }
4651
4652 static errcode_t pass1_check_directory(ext2_filsys fs, ext2_ino_t ino)
4653 {
4654         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4655
4656         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4657                 return EXT2_ET_CALLBACK_NOTHANDLED;
4658
4659         if (!LINUX_S_ISDIR(ctx->stashed_inode->i_mode))
4660                 return EXT2_ET_NO_DIRECTORY;
4661         return 0;
4662 }
4663
4664 static errcode_t e2fsck_get_alloc_block(ext2_filsys fs, blk64_t goal,
4665                                         blk64_t *ret)
4666 {
4667         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4668         errcode_t       retval;
4669         blk64_t         new_block;
4670
4671         if (ctx->block_found_map) {
4672                 retval = ext2fs_new_block2(fs, goal, ctx->block_found_map,
4673                                            &new_block);
4674                 if (retval)
4675                         return retval;
4676                 if (fs->block_map) {
4677                         ext2fs_mark_block_bitmap2(fs->block_map, new_block);
4678                         ext2fs_mark_bb_dirty(fs);
4679                 }
4680         } else {
4681                 if (!fs->block_map) {
4682                         retval = ext2fs_read_block_bitmap(fs);
4683                         if (retval)
4684                                 return retval;
4685                 }
4686
4687                 retval = ext2fs_new_block2(fs, goal, fs->block_map, &new_block);
4688                 if (retval)
4689                         return retval;
4690         }
4691
4692         *ret = new_block;
4693         return (0);
4694 }
4695
4696 static errcode_t e2fsck_new_range(ext2_filsys fs, int flags, blk64_t goal,
4697                                   blk64_t len, blk64_t *pblk, blk64_t *plen)
4698 {
4699         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4700         errcode_t       retval;
4701
4702         if (ctx->block_found_map)
4703                 return ext2fs_new_range(fs, flags, goal, len,
4704                                         ctx->block_found_map, pblk, plen);
4705
4706         if (!fs->block_map) {
4707                 retval = ext2fs_read_block_bitmap(fs);
4708                 if (retval)
4709                         return retval;
4710         }
4711
4712         return ext2fs_new_range(fs, flags, goal, len, fs->block_map,
4713                                 pblk, plen);
4714 }
4715
4716 static void e2fsck_block_alloc_stats(ext2_filsys fs, blk64_t blk, int inuse)
4717 {
4718         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4719
4720         /* Never free a critical metadata block */
4721         if (ctx->block_found_map &&
4722             ctx->block_metadata_map &&
4723             inuse < 0 &&
4724             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk))
4725                 return;
4726
4727         if (ctx->block_found_map) {
4728                 if (inuse > 0)
4729                         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4730                 else
4731                         ext2fs_unmark_block_bitmap2(ctx->block_found_map, blk);
4732         }
4733 }
4734
4735 static void e2fsck_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
4736                                            blk_t num, int inuse)
4737 {
4738         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4739
4740         /* Never free a critical metadata block */
4741         if (ctx->block_found_map &&
4742             ctx->block_metadata_map &&
4743             inuse < 0 &&
4744             ext2fs_test_block_bitmap_range2(ctx->block_metadata_map, blk, num))
4745                 return;
4746
4747         if (ctx->block_found_map) {
4748                 if (inuse > 0)
4749                         ext2fs_mark_block_bitmap_range2(ctx->block_found_map,
4750                                                         blk, num);
4751                 else
4752                         ext2fs_unmark_block_bitmap_range2(ctx->block_found_map,
4753                                                         blk, num);
4754         }
4755 }
4756
4757 void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts)
4758 {
4759         ext2_filsys fs = ctx->fs;
4760
4761         if (use_shortcuts) {
4762                 fs->get_blocks = pass1_get_blocks;
4763                 fs->check_directory = pass1_check_directory;
4764                 fs->read_inode = pass1_read_inode;
4765                 fs->write_inode = pass1_write_inode;
4766                 ctx->stashed_ino = 0;
4767         } else {
4768                 fs->get_blocks = 0;
4769                 fs->check_directory = 0;
4770                 fs->read_inode = 0;
4771                 fs->write_inode = 0;
4772         }
4773 }
4774
4775 void e2fsck_intercept_block_allocations(e2fsck_t ctx)
4776 {
4777         ext2fs_set_alloc_block_callback(ctx->fs, e2fsck_get_alloc_block, 0);
4778         ext2fs_set_block_alloc_stats_callback(ctx->fs,
4779                                                 e2fsck_block_alloc_stats, 0);
4780         ext2fs_set_new_range_callback(ctx->fs, e2fsck_new_range, NULL);
4781         ext2fs_set_block_alloc_stats_range_callback(ctx->fs,
4782                                         e2fsck_block_alloc_stats_range, NULL);
4783 }