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  *      - An icount mechanism is used to keep track of
  24  *        inodes with bad fields and its badness        (ctx->inode_badness)
  25  *      - A bitmap of which inodes are in bad blocks.   (inode_bb_map)
  26  *      - A bitmap of which inodes are imagic inodes.   (inode_imagic_map)
  27  *      - A bitmap of which inodes need to be expanded  (expand_eisize_map)
  28  *      - A bitmap of which blocks are in use.          (block_found_map)
  29  *      - A bitmap of which blocks are in use by two inodes     (block_dup_map)
  30  *      - The data blocks of the directory inodes.      (dir_map)
  31  *      - Ref counts for ea_inodes.                     (ea_inode_refs)
  32  *
  33  * Pass 1 is designed to stash away enough information so that the
  34  * other passes should not need to read in the inode information
  35  * during the normal course of a filesystem check.  (Although if an
  36  * inconsistency is detected, other passes may need to read in an
  37  * inode to fix it.)
  38  *
  39  * Note that pass 1B will be invoked if there are any duplicate blocks
  40  * found.
  41  */
  42
  43 #define _GNU_SOURCE 1 /* get strnlen() */
  44 #include "config.h"
  45 #include <string.h>
  46 #include <time.h>
  47 #ifdef HAVE_ERRNO_H
  48 #include <errno.h>
  49 #endif
  50
  51 #include "e2fsck.h"
  52 #include <ext2fs/ext2_ext_attr.h>
  53
  54 #include "problem.h"
  55
  56 #ifdef NO_INLINE_FUNCS
  57 #define _INLINE_
  58 #else
  59 #define _INLINE_ inline
  60 #endif
  61
  62 #undef DEBUG
  63
  64 struct ea_quota {
  65         blk64_t blocks;
  66         __u64 inodes;
  67 };
  68
  69 static int process_block(ext2_filsys fs, blk64_t        *blocknr,
  70                          e2_blkcnt_t blockcnt, blk64_t ref_blk,
  71                          int ref_offset, void *priv_data);
  72 static int process_bad_block(ext2_filsys fs, blk64_t *block_nr,
  73                              e2_blkcnt_t blockcnt, blk64_t ref_blk,
  74                              int ref_offset, void *priv_data);
  75 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
  76                          char *block_buf,
  77                          const struct ea_quota *ea_ibody_quota);
  78 static void mark_table_blocks(e2fsck_t ctx);
  79 static void alloc_bb_map(e2fsck_t ctx);
  80 static void alloc_imagic_map(e2fsck_t ctx);
  81 static void add_encrypted_dir(e2fsck_t ctx, ino_t ino);
  82 static void handle_fs_bad_blocks(e2fsck_t ctx);
  83 static void process_inodes(e2fsck_t ctx, char *block_buf);
  84 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b);
  85 static errcode_t scan_callback(ext2_filsys fs, ext2_inode_scan scan,
  86                                   dgrp_t group, void * priv_data);
  87 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
  88                                     char *block_buf, int adjust_sign);
  89 /* static char *describe_illegal_block(ext2_filsys fs, blk64_t block); */
  90
  91 struct process_block_struct {
  92         ext2_ino_t      ino;
  93         unsigned        is_dir:1, is_reg:1, clear:1, suppress:1,
  94                                 fragmented:1, compressed:1, bbcheck:1,
  95                                 inode_modified:1;
  96         blk64_t         num_blocks;
  97         blk64_t         max_blocks;
  98         blk64_t         last_block;
  99         e2_blkcnt_t     last_init_lblock;
 100         e2_blkcnt_t     last_db_block;
 101         int             num_illegal_blocks;
 102         blk64_t         previous_block;
 103         struct ext2_inode *inode;
 104         struct problem_context *pctx;
 105         ext2fs_block_bitmap fs_meta_blocks;
 106         e2fsck_t        ctx;
 107         blk64_t         next_lblock;
 108         struct extent_tree_info eti;
 109 };
 110
 111 struct process_inode_block {
 112         ext2_ino_t ino;
 113         struct ea_quota ea_ibody_quota;
 114         struct ext2_inode_large inode;
 115 };
 116
 117 struct scan_callback_struct {
 118         e2fsck_t        ctx;
 119         char            *block_buf;
 120 };
 121
 122 /*
 123  * For the inodes to process list.
 124  */
 125 static struct process_inode_block *inodes_to_process;
 126 static int process_inode_count;
 127
 128 static __u64 ext2_max_sizes[EXT2_MAX_BLOCK_LOG_SIZE -
 129                             EXT2_MIN_BLOCK_LOG_SIZE + 1];
 130
 131 /*
 132  * Free all memory allocated by pass1 in preparation for restarting
 133  * things.
 134  */
 135 static void unwind_pass1(ext2_filsys fs EXT2FS_ATTR((unused)))
 136 {
 137         ext2fs_free_mem(&inodes_to_process);
 138         inodes_to_process = 0;
 139 }
 140
 141 /*
 142  * Check to make sure a device inode is real.  Returns 1 if the device
 143  * checks out, 0 if not.
 144  *
 145  * Note: this routine is now also used to check FIFO's and Sockets,
 146  * since they have the same requirement; the i_block fields should be
 147  * zero.
 148  */
 149 int e2fsck_pass1_check_device_inode(ext2_filsys fs EXT2FS_ATTR((unused)),
 150                                     struct ext2_inode *inode)
 151 {
 152         int     i;
 153
 154         /*
 155          * If the index or extents flag is set, then this is a bogus
 156          * device/fifo/socket
 157          */
 158         if (inode->i_flags & (EXT2_INDEX_FL | EXT4_EXTENTS_FL))
 159                 return 0;
 160
 161         /*
 162          * We should be able to do the test below all the time, but
 163          * because the kernel doesn't forcibly clear the device
 164          * inode's additional i_block fields, there are some rare
 165          * occasions when a legitimate device inode will have non-zero
 166          * additional i_block fields.  So for now, we only complain
 167          * when the immutable flag is set, which should never happen
 168          * for devices.  (And that's when the problem is caused, since
 169          * you can't set or clear immutable flags for devices.)  Once
 170          * the kernel has been fixed we can change this...
 171          */
 172         if (inode->i_flags & (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)) {
 173                 for (i=4; i < EXT2_N_BLOCKS; i++)
 174                         if (inode->i_block[i])
 175                                 return 0;
 176         }
 177         return 1;
 178 }
 179
 180 /*
 181  * Check to make sure a symlink inode is real.  Returns 1 if the symlink
 182  * checks out, 0 if not.
 183  */
 184 int e2fsck_pass1_check_symlink(ext2_filsys fs, ext2_ino_t ino,
 185                                struct ext2_inode *inode, char *buf)
 186 {
 187         unsigned int buflen;
 188         unsigned int len;
 189
 190         if ((inode->i_size_high || inode->i_size == 0) ||
 191             (inode->i_flags & EXT2_INDEX_FL))
 192                 return 0;
 193
 194         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
 195                 size_t inline_size;
 196
 197                 if (inode->i_flags & EXT4_EXTENTS_FL)
 198                         return 0;
 199                 if (ext2fs_inline_data_size(fs, ino, &inline_size))
 200                         return 0;
 201                 if (inode->i_size != inline_size)
 202                         return 0;
 203
 204                 return 1;
 205         }
 206
 207         if (ext2fs_is_fast_symlink(inode)) {
 208                 if (inode->i_flags & EXT4_EXTENTS_FL)
 209                         return 0;
 210                 buf = (char *)inode->i_block;
 211                 buflen = sizeof(inode->i_block);
 212         } else {
 213                 ext2_extent_handle_t    handle;
 214                 struct ext2_extent_info info;
 215                 struct ext2fs_extent    extent;
 216                 blk64_t blk;
 217                 int i;
 218
 219                 if (inode->i_flags & EXT4_EXTENTS_FL) {
 220                         if (ext2fs_extent_open2(fs, ino, inode, &handle))
 221                                 return 0;
 222                         if (ext2fs_extent_get_info(handle, &info) ||
 223                             (info.num_entries != 1) ||
 224                             (info.max_depth != 0)) {
 225                                 ext2fs_extent_free(handle);
 226                                 return 0;
 227                         }
 228                         if (ext2fs_extent_get(handle, EXT2_EXTENT_ROOT,
 229                                               &extent) ||
 230                             (extent.e_lblk != 0) ||
 231                             (extent.e_len != 1)) {
 232                                 ext2fs_extent_free(handle);
 233                                 return 0;
 234                         }
 235                         blk = extent.e_pblk;
 236                         ext2fs_extent_free(handle);
 237                 } else {
 238                         blk = inode->i_block[0];
 239
 240                         for (i = 1; i < EXT2_N_BLOCKS; i++)
 241                                 if (inode->i_block[i])
 242                                         return 0;
 243                 }
 244
 245                 if (blk < fs->super->s_first_data_block ||
 246                     blk >= ext2fs_blocks_count(fs->super))
 247                         return 0;
 248
 249                 if (io_channel_read_blk64(fs->io, blk, 1, buf))
 250                         return 0;
 251
 252                 buflen = fs->blocksize;
 253         }
 254
 255         if (inode->i_flags & EXT4_ENCRYPT_FL)
 256                 len = ext2fs_le16_to_cpu(*(__u16 *)buf) + 2;
 257         else
 258                 len = strnlen(buf, buflen);
 259
 260         if (len >= buflen)
 261                 return 0;
 262
 263         if (len != inode->i_size)
 264                 return 0;
 265         return 1;
 266 }
 267
 268 /*
 269  * If the extents or inlinedata flags are set on the inode, offer to clear 'em.
 270  */
 271 #define BAD_SPECIAL_FLAGS (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)
 272 static void check_extents_inlinedata(e2fsck_t ctx,
 273                                      struct problem_context *pctx)
 274 {
 275         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 276                 return;
 277
 278         if (!fix_problem(ctx, PR_1_SPECIAL_EXTENTS_IDATA, pctx))
 279                 return;
 280
 281         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 282         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 283 }
 284 #undef BAD_SPECIAL_FLAGS
 285
 286 /*
 287  * If the immutable (or append-only) flag is set on the inode, offer
 288  * to clear it.
 289  */
 290 #define BAD_SPECIAL_FLAGS (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)
 291 static void check_immutable(e2fsck_t ctx, struct problem_context *pctx)
 292 {
 293         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 294                 return;
 295
 296         e2fsck_mark_inode_bad(ctx, pctx->ino, BADNESS_NORMAL);
 297         if (!fix_problem(ctx, PR_1_SET_IMMUTABLE, pctx))
 298                 return;
 299
 300         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 301         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 302 }
 303
 304 /*
 305  * If device, fifo or socket, check size is zero -- if not offer to
 306  * clear it
 307  */
 308 static void check_size(e2fsck_t ctx, struct problem_context *pctx)
 309 {
 310         struct ext2_inode *inode = pctx->inode;
 311
 312         if (EXT2_I_SIZE(inode) == 0)
 313                 return;
 314
 315         e2fsck_mark_inode_bad(ctx, pctx->ino, BADNESS_NORMAL);
 316         if (!fix_problem(ctx, PR_1_SET_NONZSIZE, pctx))
 317                 return;
 318
 319         ext2fs_inode_size_set(ctx->fs, inode, 0);
 320         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 321 }
 322
 323 /*
 324  * For a given size, calculate how many blocks would be charged towards quota.
 325  */
 326 static blk64_t size_to_quota_blocks(ext2_filsys fs, size_t size)
 327 {
 328         blk64_t clusters;
 329
 330         clusters = DIV_ROUND_UP(size, fs->blocksize << fs->cluster_ratio_bits);
 331         return EXT2FS_C2B(fs, clusters);
 332 }
 333
 334 /*
 335  * Check validity of EA inode. Return 0 if EA inode is valid, otherwise return
 336  * the problem code.
 337  */
 338 static problem_t check_large_ea_inode(e2fsck_t ctx,
 339                                       struct ext2_ext_attr_entry *entry,
 340                                       struct problem_context *pctx,
 341                                       blk64_t *quota_blocks)
 342 {
 343         struct ext2_inode inode;
 344         __u32 hash;
 345         errcode_t retval;
 346
 347         /* Check if inode is within valid range */
 348         if ((entry->e_value_inum < EXT2_FIRST_INODE(ctx->fs->super)) ||
 349             (entry->e_value_inum > ctx->fs->super->s_inodes_count)) {
 350                 pctx->num = entry->e_value_inum;
 351                 return PR_1_ATTR_VALUE_EA_INODE;
 352         }
 353
 354         e2fsck_read_inode(ctx, entry->e_value_inum, &inode, "pass1");
 355
 356         retval = ext2fs_ext_attr_hash_entry2(ctx->fs, entry, NULL, &hash);
 357         if (retval) {
 358                 com_err("check_large_ea_inode", retval,
 359                         _("while hashing entry with e_value_inum = %u"),
 360                         entry->e_value_inum);
 361                 fatal_error(ctx, 0);
 362         }
 363
 364         if (hash == entry->e_hash) {
 365                 *quota_blocks = size_to_quota_blocks(ctx->fs,
 366                                                      entry->e_value_size);
 367         } else {
 368                 /* This might be an old Lustre-style ea_inode reference. */
 369                 if (inode.i_mtime == pctx->ino &&
 370                     inode.i_generation == pctx->inode->i_generation) {
 371                         *quota_blocks = 0;
 372                 } else {
 373                         /* If target inode is also missing EA_INODE flag,
 374                          * this is likely to be a bad reference.
 375                          */
 376                         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 377                                 pctx->num = entry->e_value_inum;
 378                                 return PR_1_ATTR_VALUE_EA_INODE;
 379                         } else {
 380                                 pctx->num = entry->e_hash;
 381                                 return PR_1_ATTR_HASH;
 382                         }
 383                 }
 384         }
 385
 386         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 387                 pctx->num = entry->e_value_inum;
 388                 if (fix_problem(ctx, PR_1_ATTR_SET_EA_INODE_FL, pctx)) {
 389                         inode.i_flags |= EXT4_EA_INODE_FL;
 390                         ext2fs_write_inode(ctx->fs, entry->e_value_inum,
 391                                            &inode);
 392                 } else {
 393                         return PR_1_ATTR_NO_EA_INODE_FL;
 394                 }
 395         }
 396         return 0;
 397 }
 398
 399 static void inc_ea_inode_refs(e2fsck_t ctx, struct problem_context *pctx,
 400                               struct ext2_ext_attr_entry *first, void *end)
 401 {
 402         struct ext2_ext_attr_entry *entry;
 403
 404         for (entry = first;
 405              (void *)entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry);
 406              entry = EXT2_EXT_ATTR_NEXT(entry)) {
 407                 if (!entry->e_value_inum)
 408                         continue;
 409                 if (!ctx->ea_inode_refs) {
 410                         pctx->errcode = ea_refcount_create(0,
 411                                                            &ctx->ea_inode_refs);
 412                         if (pctx->errcode) {
 413                                 pctx->num = 4;
 414                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
 415                                 ctx->flags |= E2F_FLAG_ABORT;
 416                                 return;
 417                         }
 418                 }
 419                 ea_refcount_increment(ctx->ea_inode_refs, entry->e_value_inum,
 420                                       0);
 421         }
 422 }
 423
 424 static void check_ea_in_inode(e2fsck_t ctx, struct problem_context *pctx,
 425                               struct ea_quota *ea_ibody_quota)
 426 {
 427         struct ext2_super_block *sb = ctx->fs->super;
 428         struct ext2_inode_large *inode;
 429         struct ext2_ext_attr_entry *entry;
 430         char *start, *header, *end;
 431         unsigned int storage_size, remain;
 432         problem_t problem = 0;
 433         region_t region = 0;
 434
 435         ea_ibody_quota->blocks = 0;
 436         ea_ibody_quota->inodes = 0;
 437
 438         inode = (struct ext2_inode_large *) pctx->inode;
 439         storage_size = EXT2_INODE_SIZE(ctx->fs->super) -
 440                 EXT2_GOOD_OLD_INODE_SIZE - inode->i_extra_isize;
 441         header = ((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 442                  inode->i_extra_isize;
 443         end = header + storage_size;
 444         entry = &IHDR(inode)->h_first_entry[0];
 445         start = (char *)entry;
 446
 447         /* scan all entry's headers first */
 448
 449         /* take finish entry 0UL into account */
 450         remain = storage_size - sizeof(__u32);
 451
 452         region = region_create(0, storage_size);
 453         if (!region) {
 454                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
 455                 problem = 0;
 456                 ctx->flags |= E2F_FLAG_ABORT;
 457                 return;
 458         }
 459         if (region_allocate(region, 0, sizeof(__u32))) {
 460                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 461                 goto fix;
 462         }
 463
 464         while (remain >= sizeof(struct ext2_ext_attr_entry) &&
 465                !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 466                 __u32 hash;
 467
 468                 if (region_allocate(region, (char *)entry - (char *)header,
 469                                     EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
 470                         problem = PR_1_INODE_EA_ALLOC_COLLISION;
 471                         goto fix;
 472                 }
 473
 474                 /* header eats this space */
 475                 remain -= sizeof(struct ext2_ext_attr_entry);
 476
 477                 /* is attribute name valid? */
 478                 if (EXT2_EXT_ATTR_SIZE(entry->e_name_len) > remain) {
 479                         pctx->num = entry->e_name_len;
 480                         problem = PR_1_ATTR_NAME_LEN;
 481                         goto fix;
 482                 }
 483
 484                 /* attribute len eats this space */
 485                 remain -= EXT2_EXT_ATTR_SIZE(entry->e_name_len);
 486
 487                 if (entry->e_value_inum == 0) {
 488                         /* check value size */
 489                         if (entry->e_value_size > remain) {
 490                                 pctx->num = entry->e_value_size;
 491                                 problem = PR_1_ATTR_VALUE_SIZE;
 492                                 goto fix;
 493                         }
 494
 495                         if (entry->e_value_size &&
 496                             region_allocate(region,
 497                                             sizeof(__u32) + entry->e_value_offs,
 498                                             EXT2_EXT_ATTR_SIZE(
 499                                                 entry->e_value_size))) {
 500                                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 501                                 goto fix;
 502                         }
 503
 504                         hash = ext2fs_ext_attr_hash_entry(entry,
 505                                                           start + entry->e_value_offs);
 506
 507                         /* e_hash may be 0 in older inode's ea */
 508                         if (entry->e_hash != 0 && entry->e_hash != hash) {
 509                                 pctx->num = entry->e_hash;
 510                                 problem = PR_1_ATTR_HASH;
 511                                 goto fix;
 512                         }
 513                 } else {
 514                         blk64_t quota_blocks;
 515
 516                         problem = check_large_ea_inode(ctx, entry, pctx,
 517                                                        &quota_blocks);
 518                         if (problem != 0)
 519                                 goto fix;
 520
 521                         ea_ibody_quota->blocks += quota_blocks;
 522                         ea_ibody_quota->inodes++;
 523                 }
 524
 525                 /* If EA value is stored in external inode then it does not
 526                  * consume space here */
 527                 if (entry->e_value_inum == 0)
 528                         remain -= entry->e_value_size;
 529
 530                 entry = EXT2_EXT_ATTR_NEXT(entry);
 531         }
 532
 533         if (region_allocate(region, (char *)entry - (char *)header,
 534                             sizeof(__u32))) {
 535                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 536                 goto fix;
 537         }
 538 fix:
 539         if (region)
 540                 region_free(region);
 541         /*
 542          * it seems like a corruption. it's very unlikely we could repair
 543          * EA(s) in automatic fashion -bzzz
 544          */
 545         if (problem == 0 || !fix_problem(ctx, problem, pctx)) {
 546                 inc_ea_inode_refs(ctx, pctx,
 547                                   (struct ext2_ext_attr_entry *)start, end);
 548                 return;
 549         }
 550
 551         /* simply remove all possible EA(s) */
 552         *((__u32 *)header) = 0UL;
 553         e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 554                                 EXT2_INODE_SIZE(sb), "pass1");
 555         ea_ibody_quota->blocks = 0;
 556         ea_ibody_quota->inodes = 0;
 557 }
 558
 559 static int check_inode_extra_negative_epoch(__u32 xtime, __u32 extra) {
 560         return (xtime & (1U << 31)) != 0 &&
 561                 (extra & EXT4_EPOCH_MASK) == EXT4_EPOCH_MASK;
 562 }
 563
 564 #define CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, xtime) \
 565         check_inode_extra_negative_epoch(inode->i_##xtime, \
 566                                          inode->i_##xtime##_extra)
 567
 568 /* When today's date is earlier than 2242, we assume that atimes,
 569  * ctimes, crtimes, and mtimes with years in the range 2310..2378 are
 570  * actually pre-1970 dates mis-encoded.
 571  */
 572 #define EXT4_EXTRA_NEGATIVE_DATE_CUTOFF 2 * (1LL << 32)
 573
 574 static void check_inode_extra_space(e2fsck_t ctx, struct problem_context *pctx,
 575                                     struct ea_quota *ea_ibody_quota)
 576 {
 577         struct ext2_super_block *sb = ctx->fs->super;
 578         struct ext2_inode_large *inode;
 579         __u32 *eamagic;
 580         int min, max, dirty = 0;
 581
 582         ea_ibody_quota->blocks = 0;
 583         ea_ibody_quota->inodes = 0;
 584
 585         inode = (struct ext2_inode_large *) pctx->inode;
 586         if (EXT2_INODE_SIZE(sb) == EXT2_GOOD_OLD_INODE_SIZE) {
 587                 /* this isn't large inode. so, nothing to check */
 588                 return;
 589         }
 590
 591 #if 0
 592         printf("inode #%u, i_extra_size %d\n", pctx->ino,
 593                         inode->i_extra_isize);
 594 #endif
 595         /* i_extra_isize must cover i_extra_isize + i_checksum_hi at least */
 596         min = sizeof(inode->i_extra_isize) + sizeof(inode->i_checksum_hi);
 597         max = EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE;
 598         /*
 599          * For now we will allow i_extra_isize to be 0, but really
 600          * implementations should never allow i_extra_isize to be 0
 601          */
 602         if (inode->i_extra_isize &&
 603             (inode->i_extra_isize < min || inode->i_extra_isize > max ||
 604              inode->i_extra_isize & 3)) {
 605                 e2fsck_mark_inode_bad(ctx, pctx->ino, BADNESS_NORMAL);
 606                 if (!fix_problem(ctx, PR_1_EXTRA_ISIZE, pctx))
 607                         return;
 608                 if (inode->i_extra_isize < min || inode->i_extra_isize > max)
 609                         inode->i_extra_isize = ctx->want_extra_isize;
 610                 else
 611                         inode->i_extra_isize = (inode->i_extra_isize + 3) & ~3;
 612                 dirty = 1;
 613
 614                 goto out;
 615         }
 616
 617         /* check if there is no place for an EA header */
 618         if (inode->i_extra_isize >= max - sizeof(__u32))
 619                 return;
 620
 621         eamagic = &IHDR(inode)->h_magic;
 622         if (*eamagic != EXT2_EXT_ATTR_MAGIC &&
 623             (ctx->flags & E2F_FLAG_EXPAND_EISIZE) &&
 624             (inode->i_extra_isize < ctx->want_extra_isize)) {
 625                 fix_problem(ctx, PR_1_EXPAND_EISIZE, pctx);
 626                 memset((char *)inode + EXT2_GOOD_OLD_INODE_SIZE, 0,
 627                         EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE);
 628                 inode->i_extra_isize = ctx->want_extra_isize;
 629                 dirty = 1;
 630                 if (inode->i_extra_isize < ctx->min_extra_isize)
 631                         ctx->min_extra_isize = inode->i_extra_isize;
 632         }
 633
 634         if (*eamagic == EXT2_EXT_ATTR_MAGIC)
 635                 check_ea_in_inode(ctx, pctx, ea_ibody_quota);
 636
 637         /*
 638          * If the inode's extended atime (ctime, crtime, mtime) is stored in
 639          * the old, invalid format, repair it.
 640          */
 641         if (((sizeof(time_t) <= 4) ||
 642              (((sizeof(time_t) > 4) &&
 643                ctx->now < EXT4_EXTRA_NEGATIVE_DATE_CUTOFF))) &&
 644             (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime) ||
 645              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime) ||
 646              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime) ||
 647              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))) {
 648
 649                 if (!fix_problem(ctx, PR_1_EA_TIME_OUT_OF_RANGE, pctx))
 650                         return;
 651
 652                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime))
 653                         inode->i_atime_extra &= ~EXT4_EPOCH_MASK;
 654                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime))
 655                         inode->i_ctime_extra &= ~EXT4_EPOCH_MASK;
 656                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime))
 657                         inode->i_crtime_extra &= ~EXT4_EPOCH_MASK;
 658                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))
 659                         inode->i_mtime_extra &= ~EXT4_EPOCH_MASK;
 660                 dirty = 1;
 661                 e2fsck_mark_inode_bad(ctx, pctx->ino, BADNESS_HIGH);
 662         }
 663
 664 out:
 665         if (dirty)
 666                 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 667                                         EXT2_INODE_SIZE(sb), "pass1");
 668 }
 669
 670 /*
 671  * Check to see if the inode might really be a directory, despite i_mode
 672  *
 673  * This is a lot of complexity for something for which I'm not really
 674  * convinced happens frequently in the wild.  If for any reason this
 675  * causes any problems, take this code out.
 676  * [tytso:20070331.0827EDT]
 677  */
 678 static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx,
 679                                 char *buf)
 680 {
 681         struct ext2_inode *inode = pctx->inode;
 682         struct ext2_dir_entry   *dirent;
 683         errcode_t               retval;
 684         blk64_t                 blk;
 685         unsigned int            i, rec_len, not_device = 0;
 686         int                     extent_fs;
 687         int                     inlinedata_fs;
 688
 689         /*
 690          * If the mode looks OK, we believe it.  If the first block in
 691          * the i_block array is 0, this cannot be a directory. If the
 692          * inode is extent-mapped, it is still the case that the latter
 693          * cannot be 0 - the magic number in the extent header would make
 694          * it nonzero.
 695          */
 696         if (LINUX_S_ISDIR(inode->i_mode) || LINUX_S_ISREG(inode->i_mode) ||
 697             LINUX_S_ISLNK(inode->i_mode) || inode->i_block[0] == 0)
 698                 return;
 699
 700         /*
 701          * Check the block numbers in the i_block array for validity:
 702          * zero blocks are skipped (but the first one cannot be zero -
 703          * see above), other blocks are checked against the first and
 704          * max data blocks (from the the superblock) and against the
 705          * block bitmap. Any invalid block found means this cannot be
 706          * a directory.
 707          *
 708          * If there are non-zero blocks past the fourth entry, then
 709          * this cannot be a device file: we remember that for the next
 710          * check.
 711          *
 712          * For extent mapped files, we don't do any sanity checking:
 713          * just try to get the phys block of logical block 0 and run
 714          * with it.
 715          *
 716          * For inline data files, we just try to get the size of inline
 717          * data.  If it's true, we will treat it as a directory.
 718          */
 719
 720         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
 721         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
 722         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL)) {
 723                 size_t size;
 724                 __u32 dotdot;
 725                 unsigned int rec_len2;
 726                 struct ext2_dir_entry de;
 727
 728                 if (ext2fs_inline_data_size(ctx->fs, pctx->ino, &size))
 729                         return;
 730                 /*
 731                  * If the size isn't a multiple of 4, it's probably not a
 732                  * directory??
 733                  */
 734                 if (size & 3)
 735                         return;
 736                 /*
 737                  * If the first 10 bytes don't look like a directory entry,
 738                  * it's probably not a directory.
 739                  */
 740                 memcpy(&dotdot, inode->i_block, sizeof(dotdot));
 741                 memcpy(&de, ((char *)inode->i_block) + EXT4_INLINE_DATA_DOTDOT_SIZE,
 742                        EXT2_DIR_REC_LEN(0));
 743                 dotdot = ext2fs_le32_to_cpu(dotdot);
 744                 de.inode = ext2fs_le32_to_cpu(de.inode);
 745                 de.rec_len = ext2fs_le16_to_cpu(de.rec_len);
 746                 ext2fs_get_rec_len(ctx->fs, &de, &rec_len2);
 747                 if (dotdot >= ctx->fs->super->s_inodes_count ||
 748                     (dotdot < EXT2_FIRST_INO(ctx->fs->super) &&
 749                      dotdot != EXT2_ROOT_INO) ||
 750                     de.inode >= ctx->fs->super->s_inodes_count ||
 751                     (de.inode < EXT2_FIRST_INO(ctx->fs->super) &&
 752                      de.inode != 0) ||
 753                     rec_len2 > EXT4_MIN_INLINE_DATA_SIZE -
 754                               EXT4_INLINE_DATA_DOTDOT_SIZE)
 755                         return;
 756                 /* device files never have a "system.data" entry */
 757                 goto isdir;
 758         } else if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) {
 759                 /* extent mapped */
 760                 if  (ext2fs_bmap2(ctx->fs, pctx->ino, inode, 0, 0, 0, 0,
 761                                  &blk))
 762                         return;
 763                 /* device files are never extent mapped */
 764                 not_device++;
 765         } else {
 766                 for (i=0; i < EXT2_N_BLOCKS; i++) {
 767                         blk = inode->i_block[i];
 768                         if (!blk)
 769                                 continue;
 770                         if (i >= 4)
 771                                 not_device++;
 772
 773                         if (blk < ctx->fs->super->s_first_data_block ||
 774                             blk >= ext2fs_blocks_count(ctx->fs->super) ||
 775                             ext2fs_fast_test_block_bitmap2(ctx->block_found_map,
 776                                                            blk))
 777                                 return; /* Invalid block, can't be dir */
 778                 }
 779                 blk = inode->i_block[0];
 780         }
 781
 782         /*
 783          * If the mode says this is a device file and the i_links_count field
 784          * is sane and we have not ruled it out as a device file previously,
 785          * we declare it a device file, not a directory.
 786          */
 787         if ((LINUX_S_ISCHR(inode->i_mode) || LINUX_S_ISBLK(inode->i_mode)) &&
 788             (inode->i_links_count == 1) && !not_device)
 789                 return;
 790
 791         /* read the first block */
 792         ehandler_operation(_("reading directory block"));
 793         retval = ext2fs_read_dir_block4(ctx->fs, blk, buf, 0, pctx->ino);
 794         ehandler_operation(0);
 795         if (retval)
 796                 return;
 797
 798         dirent = (struct ext2_dir_entry *) buf;
 799         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 800         if (retval)
 801                 return;
 802         if ((ext2fs_dirent_name_len(dirent) != 1) ||
 803             (dirent->name[0] != '.') ||
 804             (dirent->inode != pctx->ino) ||
 805             (rec_len < 12) ||
 806             (rec_len % 4) ||
 807             (rec_len >= ctx->fs->blocksize - 12))
 808                 return;
 809
 810         dirent = (struct ext2_dir_entry *) (buf + rec_len);
 811         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 812         if (retval)
 813                 return;
 814         if ((ext2fs_dirent_name_len(dirent) != 2) ||
 815             (dirent->name[0] != '.') ||
 816             (dirent->name[1] != '.') ||
 817             (rec_len < 12) ||
 818             (rec_len % 4))
 819                 return;
 820
 821 isdir:
 822         e2fsck_mark_inode_bad(ctx, pctx->ino, BADNESS_NORMAL);
 823         if (fix_problem(ctx, PR_1_TREAT_AS_DIRECTORY, pctx)) {
 824                 inode->i_mode = (inode->i_mode & 07777) | LINUX_S_IFDIR;
 825                 e2fsck_write_inode_full(ctx, pctx->ino, inode,
 826                                         EXT2_INODE_SIZE(ctx->fs->super),
 827                                         "check_is_really_dir");
 828         }
 829 }
 830
 831 extern errcode_t e2fsck_setup_icount(e2fsck_t ctx, const char *icount_name,
 832                                      int flags, ext2_icount_t hint,
 833                                      ext2_icount_t *ret)
 834 {
 835         unsigned int            threshold;
 836         unsigned int            save_type;
 837         ext2_ino_t              num_dirs;
 838         errcode_t               retval;
 839         char                    *tdb_dir;
 840         int                     enable;
 841
 842         *ret = 0;
 843
 844         profile_get_string(ctx->profile, "scratch_files", "directory", 0, 0,
 845                            &tdb_dir);
 846         profile_get_uint(ctx->profile, "scratch_files",
 847                          "numdirs_threshold", 0, 0, &threshold);
 848         profile_get_boolean(ctx->profile, "scratch_files",
 849                             "icount", 0, 1, &enable);
 850
 851         retval = ext2fs_get_num_dirs(ctx->fs, &num_dirs);
 852         if (retval)
 853                 num_dirs = 1024;        /* Guess */
 854
 855         if (enable && tdb_dir && !access(tdb_dir, W_OK) &&
 856             (!threshold || num_dirs > threshold)) {
 857                 retval = ext2fs_create_icount_tdb(ctx->fs, tdb_dir,
 858                                                   flags, ret);
 859                 if (retval == 0)
 860                         return 0;
 861         }
 862         e2fsck_set_bitmap_type(ctx->fs, EXT2FS_BMAP64_RBTREE, icount_name,
 863                                &save_type);
 864         if (ctx->options & E2F_OPT_ICOUNT_FULLMAP)
 865                 flags |= EXT2_ICOUNT_OPT_FULLMAP;
 866         retval = ext2fs_create_icount2(ctx->fs, flags, 0, hint, ret);
 867         ctx->fs->default_bitmap_type = save_type;
 868         return retval;
 869 }
 870
 871 static errcode_t recheck_bad_inode_checksum(ext2_filsys fs, ext2_ino_t ino,
 872                                             e2fsck_t ctx,
 873                                             struct problem_context *pctx)
 874 {
 875         errcode_t retval;
 876         struct ext2_inode_large inode;
 877
 878         /*
 879          * Reread inode.  If we don't see checksum error, then this inode
 880          * has been fixed elsewhere.
 881          */
 882         ctx->stashed_ino = 0;
 883         retval = ext2fs_read_inode_full(fs, ino, (struct ext2_inode *)&inode,
 884                                         sizeof(inode));
 885         if (retval && retval != EXT2_ET_INODE_CSUM_INVALID)
 886                 return retval;
 887         if (!retval)
 888                 return 0;
 889
 890         /*
 891          * Checksum still doesn't match.  That implies that the inode passes
 892          * all the sanity checks, so maybe the checksum is simply corrupt.
 893          * See if the user will go for fixing that.
 894          */
 895         if (!fix_problem(ctx, PR_1_INODE_ONLY_CSUM_INVALID, pctx))
 896                 return 0;
 897
 898         retval = ext2fs_write_inode_full(fs, ino, (struct ext2_inode *)&inode,
 899                                          sizeof(inode));
 900         return retval;
 901 }
 902
 903 int e2fsck_pass1_delete_attr(e2fsck_t ctx, struct ext2_inode_large *inode,
 904                              struct problem_context *pctx, int needed_size)
 905 {
 906         struct ext2_ext_attr_header *header;
 907         struct ext2_ext_attr_entry *entry_ino, *entry_blk = NULL, *entry;
 908         char *start, name[4096], block_buf[4096];
 909         int len, index = EXT2_ATTR_INDEX_USER, entry_size, ea_size;
 910         int in_inode = 1, error;
 911         unsigned int freed_bytes = inode->i_extra_isize;
 912
 913         entry_ino = &IHDR(inode)->h_first_entry[0];
 914         start = (char *)entry_ino;
 915
 916         if (inode->i_file_acl) {
 917                 error = ext2fs_read_ext_attr(ctx->fs, inode->i_file_acl,
 918                                              block_buf);
 919                 /* We have already checked this block, shouldn't happen */
 920                 if (error) {
 921                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, pctx);
 922                         return 0;
 923                 }
 924                 header = BHDR(block_buf);
 925                 if (header->h_magic != EXT2_EXT_ATTR_MAGIC) {
 926                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, pctx);
 927                         return 0;
 928                 }
 929
 930                 entry_blk = (struct ext2_ext_attr_entry *)(header+1);
 931         }
 932         entry = entry_ino;
 933         len = sizeof(entry->e_name);
 934         entry_size = ext2fs_attr_get_next_attr(entry, index, name, len, 1);
 935
 936         while (freed_bytes < needed_size) {
 937                 if (entry_size && name[0] != '\0') {
 938                         pctx->str = name;
 939                         if (fix_problem(ctx, PR_1_EISIZE_DELETE_EA, pctx)) {
 940                                 ea_size = EXT2_EXT_ATTR_LEN(entry->e_name_len) +
 941                                           EXT2_EXT_ATTR_SIZE(entry->e_value_size);
 942                                 error = ext2fs_attr_set(ctx->fs, pctx->ino,
 943                                                         (struct ext2_inode *)inode,
 944                                                         index, name, 0, 0, 0);
 945                                 if (!error)
 946                                         freed_bytes += ea_size;
 947                         }
 948                 }
 949                 len = sizeof(entry->e_name);
 950                 entry_size = ext2fs_attr_get_next_attr(entry, index,name,len,0);
 951                 entry = EXT2_EXT_ATTR_NEXT(entry);
 952                 if (EXT2_EXT_IS_LAST_ENTRY(entry)) {
 953                         if (in_inode) {
 954                                 entry = entry_blk;
 955                                 len = sizeof(entry->e_name);
 956                                 entry_size = ext2fs_attr_get_next_attr(entry,
 957                                                         index, name, len, 1);
 958                                 in_inode = 0;
 959                         } else {
 960                                 index += 1;
 961                                 in_inode = 1;
 962                                 if (!entry && index < EXT2_ATTR_INDEX_MAX)
 963                                         entry = (struct ext2_ext_attr_entry *)start;
 964                                 else
 965                                         return freed_bytes;
 966                         }
 967                 }
 968         }
 969
 970         return freed_bytes;
 971 }
 972
 973 int e2fsck_pass1_expand_eisize(e2fsck_t ctx, struct ext2_inode_large *inode,
 974                                struct problem_context *pctx)
 975 {
 976         int needed_size = 0, retval, ret = EXT2_EXPAND_EISIZE_UNSAFE;
 977         static int message;
 978
 979 retry:
 980         retval = ext2fs_expand_extra_isize(ctx->fs, pctx->ino, inode,
 981                                            ctx->want_extra_isize, &ret,
 982                                            &needed_size);
 983         if (ret & EXT2_EXPAND_EISIZE_NEW_BLOCK)
 984                 goto mark_expand_eisize_map;
 985         if (!retval) {
 986                 e2fsck_write_inode_full(ctx, pctx->ino,
 987                                         (struct ext2_inode *)inode,
 988                                         EXT2_INODE_SIZE(ctx->fs->super),
 989                                         "pass1");
 990                 return 0;
 991         }
 992
 993         if (ret & EXT2_EXPAND_EISIZE_NOSPC) {
 994                 if (ctx->options & (E2F_OPT_PREEN | E2F_OPT_YES)) {
 995                         fix_problem(ctx, PR_1_EA_BLK_NOSPC, pctx);
 996                         ctx->flags |= E2F_FLAG_ABORT;
 997                         return -1;
 998                 }
 999
1000                 if (!message) {
1001                         pctx->num = ctx->fs->super->s_min_extra_isize;
1002                         fix_problem(ctx, PR_1_EXPAND_EISIZE_WARNING, pctx);
1003                         message = 1;
1004                 }
1005 delete_EA:
1006                 retval = e2fsck_pass1_delete_attr(ctx, inode, pctx,
1007                                                   needed_size);
1008                 if (retval >= ctx->want_extra_isize)
1009                         goto retry;
1010
1011                 needed_size -= retval;
1012
1013                 /*
1014                  * We loop here until either the user deletes EA(s) or
1015                  * EXTRA_ISIZE feature is disabled.
1016                  */
1017                 if (fix_problem(ctx, PR_1_CLEAR_EXTRA_ISIZE, pctx)) {
1018                         ctx->fs->super->s_feature_ro_compat &=
1019                                         ~EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE;
1020                         ext2fs_mark_super_dirty(ctx->fs);
1021                 } else {
1022                         goto delete_EA;
1023                 }
1024                 ctx->fs_unexpanded_inodes++;
1025
1026                 /* No EA was deleted, inode cannot be expanded */
1027                 return -1;
1028         }
1029
1030 mark_expand_eisize_map:
1031         if (!ctx->expand_eisize_map) {
1032                 pctx->errcode = ext2fs_allocate_inode_bitmap(ctx->fs,
1033                                          _("expand extrz isize map"),
1034                                          &ctx->expand_eisize_map);
1035                 if (pctx->errcode) {
1036                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR,
1037                                     pctx);
1038                         exit(1);
1039                 }
1040         }
1041
1042         /* Add this inode to the expand_eisize_map */
1043         ext2fs_mark_inode_bitmap2(ctx->expand_eisize_map, pctx->ino);
1044         return 0;
1045 }
1046
1047 static void reserve_block_for_root_repair(e2fsck_t ctx)
1048 {
1049         blk64_t         blk = 0;
1050         errcode_t       err;
1051         ext2_filsys     fs = ctx->fs;
1052
1053         ctx->root_repair_block = 0;
1054         if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO))
1055                 return;
1056
1057         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
1058         if (err)
1059                 return;
1060         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
1061         ctx->root_repair_block = blk;
1062 }
1063
1064 static void reserve_block_for_lnf_repair(e2fsck_t ctx)
1065 {
1066         blk64_t         blk = 0;
1067         errcode_t       err;
1068         ext2_filsys     fs = ctx->fs;
1069         static const char name[] = "lost+found";
1070         ext2_ino_t      ino;
1071
1072         ctx->lnf_repair_block = 0;
1073         if (!ext2fs_lookup(fs, EXT2_ROOT_INO, name, sizeof(name)-1, 0, &ino))
1074                 return;
1075
1076         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
1077         if (err)
1078                 return;
1079         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
1080         ctx->lnf_repair_block = blk;
1081 }
1082
1083 static errcode_t get_inline_data_ea_size(ext2_filsys fs, ext2_ino_t ino,
1084                                          size_t *sz)
1085 {
1086         void *p;
1087         struct ext2_xattr_handle *handle;
1088         errcode_t retval;
1089
1090         retval = ext2fs_xattrs_open(fs, ino, &handle);
1091         if (retval)
1092                 return retval;
1093
1094         retval = ext2fs_xattrs_read(handle);
1095         if (retval)
1096                 goto err;
1097
1098         retval = ext2fs_xattr_get(handle, "system.data", &p, sz);
1099         if (retval)
1100                 goto err;
1101         ext2fs_free_mem(&p);
1102 err:
1103         (void) ext2fs_xattrs_close(&handle);
1104         return retval;
1105 }
1106
1107 static void finish_processing_inode(e2fsck_t ctx, ext2_ino_t ino,
1108                                     struct problem_context *pctx,
1109                                     int failed_csum)
1110 {
1111         if (!failed_csum)
1112                 return;
1113
1114         /*
1115          * If the inode failed the checksum and the user didn't
1116          * clear the inode, test the checksum again -- if it still
1117          * fails, ask the user if the checksum should be corrected.
1118          */
1119         pctx->errcode = recheck_bad_inode_checksum(ctx->fs, ino, ctx, pctx);
1120         if (pctx->errcode)
1121                 ctx->flags |= E2F_FLAG_ABORT;
1122 }
1123 #define FINISH_INODE_LOOP(ctx, ino, pctx, failed_csum) \
1124         do { \
1125                 finish_processing_inode((ctx), (ino), (pctx), (failed_csum)); \
1126                 if ((ctx)->flags & E2F_FLAG_ABORT) \
1127                         return; \
1128         } while (0)
1129
1130 static int could_be_block_map(ext2_filsys fs, struct ext2_inode *inode)
1131 {
1132         __u32 x;
1133         int i;
1134
1135         for (i = 0; i < EXT2_N_BLOCKS; i++) {
1136                 x = inode->i_block[i];
1137 #ifdef WORDS_BIGENDIAN
1138                 x = ext2fs_swab32(x);
1139 #endif
1140                 if (x >= ext2fs_blocks_count(fs->super))
1141                         return 0;
1142         }
1143
1144         return 1;
1145 }
1146
1147 /*
1148  * Figure out what to do with an inode that has both extents and inline data
1149  * inode flags set.  Returns -1 if we decide to erase the inode, 0 otherwise.
1150  */
1151 static int fix_inline_data_extents_file(e2fsck_t ctx,
1152                                         ext2_ino_t ino,
1153                                         struct ext2_inode *inode,
1154                                         int inode_size,
1155                                         struct problem_context *pctx)
1156 {
1157         size_t max_inline_ea_size;
1158         ext2_filsys fs = ctx->fs;
1159         int dirty = 0;
1160
1161         /* Both feature flags not set?  Just run the regular checks */
1162         if (!ext2fs_has_feature_extents(fs->super) &&
1163             !ext2fs_has_feature_inline_data(fs->super))
1164                 return 0;
1165
1166         /* Clear both flags if it's a special file */
1167         if (LINUX_S_ISCHR(inode->i_mode) ||
1168             LINUX_S_ISBLK(inode->i_mode) ||
1169             LINUX_S_ISFIFO(inode->i_mode) ||
1170             LINUX_S_ISSOCK(inode->i_mode)) {
1171                 check_extents_inlinedata(ctx, pctx);
1172                 return 0;
1173         }
1174
1175         /* If it looks like an extent tree, try to clear inlinedata */
1176         if (ext2fs_extent_header_verify(inode->i_block,
1177                                  sizeof(inode->i_block)) == 0 &&
1178             fix_problem(ctx, PR_1_CLEAR_INLINE_DATA_FOR_EXTENT, pctx)) {
1179                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1180                 dirty = 1;
1181                 goto out;
1182         }
1183
1184         /* If it looks short enough to be inline data, try to clear extents */
1185         if (inode_size > EXT2_GOOD_OLD_INODE_SIZE)
1186                 max_inline_ea_size = inode_size -
1187                                      (EXT2_GOOD_OLD_INODE_SIZE +
1188                                       ((struct ext2_inode_large *)inode)->i_extra_isize);
1189         else
1190                 max_inline_ea_size = 0;
1191         if (EXT2_I_SIZE(inode) <
1192             EXT4_MIN_INLINE_DATA_SIZE + max_inline_ea_size &&
1193             fix_problem(ctx, PR_1_CLEAR_EXTENT_FOR_INLINE_DATA, pctx)) {
1194                 inode->i_flags &= ~EXT4_EXTENTS_FL;
1195                 dirty = 1;
1196                 goto out;
1197         }
1198
1199         /*
1200          * Too big for inline data, but no evidence of extent tree -
1201          * maybe it's a block map file?  If the mappings all look valid?
1202          */
1203         if (could_be_block_map(fs, inode) &&
1204             fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_FLAGS, pctx)) {
1205 #ifdef WORDS_BIGENDIAN
1206                 int i;
1207
1208                 for (i = 0; i < EXT2_N_BLOCKS; i++)
1209                         inode->i_block[i] = ext2fs_swab32(inode->i_block[i]);
1210 #endif
1211
1212                 inode->i_flags &= ~(EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL);
1213                 dirty = 1;
1214                 goto out;
1215         }
1216
1217         /* Oh well, just clear the busted inode. */
1218         if (fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_INODE, pctx)) {
1219                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1220                 return -1;
1221         }
1222
1223 out:
1224         if (dirty)
1225                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1226
1227         return 0;
1228 }
1229
1230 static void pass1_readahead(e2fsck_t ctx, dgrp_t *group, ext2_ino_t *next_ino)
1231 {
1232         ext2_ino_t inodes_in_group = 0, inodes_per_block, inodes_per_buffer;
1233         dgrp_t start = *group, grp;
1234         blk64_t blocks_to_read = 0;
1235         errcode_t err = EXT2_ET_INVALID_ARGUMENT;
1236
1237         if (ctx->readahead_kb == 0)
1238                 goto out;
1239
1240         /* Keep iterating groups until we have enough to readahead */
1241         inodes_per_block = EXT2_INODES_PER_BLOCK(ctx->fs->super);
1242         for (grp = start; grp < ctx->fs->group_desc_count; grp++) {
1243                 if (ext2fs_bg_flags_test(ctx->fs, grp, EXT2_BG_INODE_UNINIT))
1244                         continue;
1245                 inodes_in_group = ctx->fs->super->s_inodes_per_group -
1246                                         ext2fs_bg_itable_unused(ctx->fs, grp);
1247                 blocks_to_read += (inodes_in_group + inodes_per_block - 1) /
1248                                         inodes_per_block;
1249                 if (blocks_to_read * ctx->fs->blocksize >
1250                     ctx->readahead_kb * 1024)
1251                         break;
1252         }
1253
1254         err = e2fsck_readahead(ctx->fs, E2FSCK_READA_ITABLE, start,
1255                                grp - start + 1);
1256         if (err == EAGAIN) {
1257                 ctx->readahead_kb /= 2;
1258                 err = 0;
1259         }
1260
1261 out:
1262         if (err) {
1263                 /* Error; disable itable readahead */
1264                 *group = ctx->fs->group_desc_count;
1265                 *next_ino = ctx->fs->super->s_inodes_count;
1266         } else {
1267                 /*
1268                  * Don't do more readahead until we've reached the first inode
1269                  * of the last inode scan buffer block for the last group.
1270                  */
1271                 *group = grp + 1;
1272                 inodes_per_buffer = (ctx->inode_buffer_blocks ?
1273                                      ctx->inode_buffer_blocks :
1274                                      EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS) *
1275                                     ctx->fs->blocksize /
1276                                     EXT2_INODE_SIZE(ctx->fs->super);
1277                 inodes_in_group--;
1278                 *next_ino = inodes_in_group -
1279                             (inodes_in_group % inodes_per_buffer) + 1 +
1280                             (grp * ctx->fs->super->s_inodes_per_group);
1281         }
1282 }
1283
1284 /*
1285  * Check if the passed ino is one of the used superblock quota inodes.
1286  *
1287  * Before the quota inodes were journaled, older superblock quota inodes
1288  * were just regular files in the filesystem and not reserved inodes.  This
1289  * checks if the passed ino is one of the s_*_quota_inum superblock fields,
1290  * which may not always be the same as the EXT4_*_QUOTA_INO fields.
1291  */
1292 static int quota_inum_is_super(struct ext2_super_block *sb, ext2_ino_t ino)
1293 {
1294         enum quota_type qtype;
1295
1296         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1297                 if (*quota_sb_inump(sb, qtype) == ino)
1298                         return 1;
1299
1300         return 0;
1301 }
1302
1303 /*
1304  * Check if the passed ino is one of the reserved quota inodes.
1305  * This checks if the inode number is one of the reserved EXT4_*_QUOTA_INO
1306  * inodes.  These inodes may or may not be in use by the quota feature.
1307  */
1308 static int quota_inum_is_reserved(ext2_filsys fs, ext2_ino_t ino)
1309 {
1310         enum quota_type qtype;
1311
1312         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1313                 if (quota_type2inum(qtype, fs->super) == ino)
1314                         return 1;
1315
1316         return 0;
1317 }
1318
1319 void e2fsck_pass1(e2fsck_t ctx)
1320 {
1321         int     i;
1322         __u64   max_sizes;
1323         ext2_filsys fs = ctx->fs;
1324         ext2_ino_t      ino = 0;
1325         struct ext2_inode *inode = NULL;
1326         ext2_inode_scan scan = NULL;
1327         char            *block_buf = NULL;
1328 #ifdef RESOURCE_TRACK
1329         struct resource_track   rtrack;
1330 #endif
1331         unsigned char   frag, fsize;
1332         struct          problem_context pctx;
1333         struct          scan_callback_struct scan_struct;
1334         struct ext2_super_block *sb = ctx->fs->super;
1335         const char      *old_op;
1336         int             imagic_fs, extent_fs, inlinedata_fs;
1337         int             low_dtime_check = 1;
1338         unsigned int    inode_size = EXT2_INODE_SIZE(fs->super);
1339         unsigned int    bufsize;
1340         int             failed_csum = 0;
1341         ext2_ino_t      ino_threshold = 0;
1342         dgrp_t          ra_group = 0;
1343         struct ea_quota ea_ibody_quota;
1344         int             inode_exp = 0;
1345
1346         init_resource_track(&rtrack, ctx->fs->io);
1347         clear_problem_context(&pctx);
1348
1349         /* If we can do readahead, figure out how many groups to pull in. */
1350         if (!e2fsck_can_readahead(ctx->fs))
1351                 ctx->readahead_kb = 0;
1352         else if (ctx->readahead_kb == ~0ULL)
1353                 ctx->readahead_kb = e2fsck_guess_readahead(ctx->fs);
1354         pass1_readahead(ctx, &ra_group, &ino_threshold);
1355
1356         if (!(ctx->options & E2F_OPT_PREEN))
1357                 fix_problem(ctx, PR_1_PASS_HEADER, &pctx);
1358
1359         if (ext2fs_has_feature_dir_index(fs->super) &&
1360             !(ctx->options & E2F_OPT_NO)) {
1361                 if (ext2fs_u32_list_create(&ctx->dirs_to_hash, 50))
1362                         ctx->dirs_to_hash = 0;
1363         }
1364
1365 #ifdef MTRACE
1366         mtrace_print("Pass 1");
1367 #endif
1368
1369 #define EXT2_BPP(bits) (1ULL << ((bits) - 2))
1370
1371         for (i = EXT2_MIN_BLOCK_LOG_SIZE; i <= EXT2_MAX_BLOCK_LOG_SIZE; i++) {
1372                 max_sizes = EXT2_NDIR_BLOCKS + EXT2_BPP(i);
1373                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i);
1374                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i) * EXT2_BPP(i);
1375                 max_sizes = (max_sizes * (1UL << i));
1376                 ext2_max_sizes[i - EXT2_MIN_BLOCK_LOG_SIZE] = max_sizes;
1377         }
1378 #undef EXT2_BPP
1379
1380         imagic_fs = ext2fs_has_feature_imagic_inodes(sb);
1381         extent_fs = ext2fs_has_feature_extents(sb);
1382         inlinedata_fs = ext2fs_has_feature_inline_data(sb);
1383
1384         /*
1385          * Allocate bitmaps structures
1386          */
1387         pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("in-use inode map"),
1388                                                     EXT2FS_BMAP64_RBTREE,
1389                                                     "inode_used_map",
1390                                                     &ctx->inode_used_map);
1391         if (pctx.errcode) {
1392                 pctx.num = 1;
1393                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1394                 ctx->flags |= E2F_FLAG_ABORT;
1395                 return;
1396         }
1397         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1398                         _("directory inode map"),
1399                         EXT2FS_BMAP64_AUTODIR,
1400                         "inode_dir_map", &ctx->inode_dir_map);
1401         if (pctx.errcode) {
1402                 pctx.num = 2;
1403                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1404                 ctx->flags |= E2F_FLAG_ABORT;
1405                 return;
1406         }
1407         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1408                         _("regular file inode map"), EXT2FS_BMAP64_RBTREE,
1409                         "inode_reg_map", &ctx->inode_reg_map);
1410         if (pctx.errcode) {
1411                 pctx.num = 6;
1412                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1413                 ctx->flags |= E2F_FLAG_ABORT;
1414                 return;
1415         }
1416         pctx.errcode = e2fsck_allocate_subcluster_bitmap(fs,
1417                         _("in-use block map"), EXT2FS_BMAP64_RBTREE,
1418                         "block_found_map", &ctx->block_found_map);
1419         if (pctx.errcode) {
1420                 pctx.num = 1;
1421                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1422                 ctx->flags |= E2F_FLAG_ABORT;
1423                 return;
1424         }
1425         pctx.errcode = e2fsck_allocate_block_bitmap(fs,
1426                         _("metadata block map"), EXT2FS_BMAP64_RBTREE,
1427                         "block_metadata_map", &ctx->block_metadata_map);
1428         if (pctx.errcode) {
1429                 pctx.num = 1;
1430                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1431                 ctx->flags |= E2F_FLAG_ABORT;
1432                 return;
1433         }
1434         pctx.errcode = e2fsck_setup_icount(ctx, "inode_link_info", 0, NULL,
1435                                            &ctx->inode_link_info);
1436         if (pctx.errcode) {
1437                 fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
1438                 ctx->flags |= E2F_FLAG_ABORT;
1439                 return;
1440         }
1441         bufsize = inode_size;
1442         if (bufsize < sizeof(struct ext2_inode_large))
1443                 bufsize = sizeof(struct ext2_inode_large);
1444         inode = (struct ext2_inode *)
1445                 e2fsck_allocate_memory(ctx, bufsize, "scratch inode");
1446
1447         inodes_to_process = (struct process_inode_block *)
1448                 e2fsck_allocate_memory(ctx,
1449                                        (ctx->process_inode_size *
1450                                         sizeof(struct process_inode_block)),
1451                                        "array of inodes to process");
1452         process_inode_count = 0;
1453
1454         pctx.errcode = ext2fs_init_dblist(fs, 0);
1455         if (pctx.errcode) {
1456                 fix_problem(ctx, PR_1_ALLOCATE_DBCOUNT, &pctx);
1457                 ctx->flags |= E2F_FLAG_ABORT;
1458                 goto endit;
1459         }
1460
1461         /*
1462          * If the last orphan field is set, clear it, since the pass1
1463          * processing will automatically find and clear the orphans.
1464          * In the future, we may want to try using the last_orphan
1465          * linked list ourselves, but for now, we clear it so that the
1466          * ext3 mount code won't get confused.
1467          */
1468         if (!(ctx->options & E2F_OPT_READONLY)) {
1469                 if (fs->super->s_last_orphan) {
1470                         fs->super->s_last_orphan = 0;
1471                         ext2fs_mark_super_dirty(fs);
1472                 }
1473         }
1474
1475         mark_table_blocks(ctx);
1476         pctx.errcode = ext2fs_convert_subcluster_bitmap(fs,
1477                                                 &ctx->block_found_map);
1478         if (pctx.errcode) {
1479                 fix_problem(ctx, PR_1_CONVERT_SUBCLUSTER, &pctx);
1480                 ctx->flags |= E2F_FLAG_ABORT;
1481                 goto endit;
1482         }
1483         block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3,
1484                                                     "block interate buffer");
1485         if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
1486                 e2fsck_use_inode_shortcuts(ctx, 1);
1487         e2fsck_intercept_block_allocations(ctx);
1488         old_op = ehandler_operation(_("opening inode scan"));
1489         pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks,
1490                                               &scan);
1491         ehandler_operation(old_op);
1492         if (pctx.errcode) {
1493                 fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1494                 ctx->flags |= E2F_FLAG_ABORT;
1495                 goto endit;
1496         }
1497         ext2fs_inode_scan_flags(scan, EXT2_SF_SKIP_MISSING_ITABLE |
1498                                       EXT2_SF_WARN_GARBAGE_INODES, 0);
1499         ctx->stashed_inode = inode;
1500         scan_struct.ctx = ctx;
1501         scan_struct.block_buf = block_buf;
1502         ext2fs_set_inode_callback(scan, scan_callback, &scan_struct);
1503         if (ctx->progress && ((ctx->progress)(ctx, 1, 0,
1504                                               ctx->fs->group_desc_count)))
1505                 goto endit;
1506         if ((fs->super->s_wtime < fs->super->s_inodes_count) ||
1507             (fs->super->s_mtime < fs->super->s_inodes_count) ||
1508             (fs->super->s_mkfs_time &&
1509              fs->super->s_mkfs_time < fs->super->s_inodes_count))
1510                 low_dtime_check = 0;
1511
1512         if (ext2fs_has_feature_mmp(fs->super) &&
1513             fs->super->s_mmp_block > fs->super->s_first_data_block &&
1514             fs->super->s_mmp_block < ext2fs_blocks_count(fs->super))
1515                 ext2fs_mark_block_bitmap2(ctx->block_found_map,
1516                                           fs->super->s_mmp_block);
1517
1518         /* Set up ctx->lost_and_found if possible */
1519         (void) e2fsck_get_lost_and_found(ctx, 0);
1520
1521         while (1) {
1522                 if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
1523                         if (e2fsck_mmp_update(fs))
1524                                 fatal_error(ctx, 0);
1525                 }
1526                 old_op = ehandler_operation(_("getting next inode from scan"));
1527                 pctx.errcode = ext2fs_get_next_inode_full(scan, &ino,
1528                                                           inode, inode_size);
1529                 if (ino > ino_threshold)
1530                         pass1_readahead(ctx, &ra_group, &ino_threshold);
1531                 ehandler_operation(old_op);
1532                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1533                         goto endit;
1534                 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) {
1535                         /*
1536                          * If badblocks says badblocks is bad, offer to clear
1537                          * the list, update the in-core bb list, and restart
1538                          * the inode scan.
1539                          */
1540                         if (ino == EXT2_BAD_INO &&
1541                             fix_problem(ctx, PR_1_BADBLOCKS_IN_BADBLOCKS,
1542                                         &pctx)) {
1543                                 errcode_t err;
1544
1545                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1546                                 ext2fs_badblocks_list_free(ctx->fs->badblocks);
1547                                 ctx->fs->badblocks = NULL;
1548                                 err = ext2fs_read_bb_inode(ctx->fs,
1549                                                         &ctx->fs->badblocks);
1550                                 if (err) {
1551                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1552                                                     &pctx);
1553                                         ctx->flags |= E2F_FLAG_ABORT;
1554                                         goto endit;
1555                                 }
1556                                 err = ext2fs_inode_scan_goto_blockgroup(scan,
1557                                                                         0);
1558                                 if (err) {
1559                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1560                                                     &pctx);
1561                                         ctx->flags |= E2F_FLAG_ABORT;
1562                                         goto endit;
1563                                 }
1564                                 continue;
1565                         }
1566                         if (!ctx->inode_bb_map)
1567                                 alloc_bb_map(ctx);
1568                         ext2fs_mark_inode_bitmap2(ctx->inode_bb_map, ino);
1569                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1570                         continue;
1571                 }
1572                 if (pctx.errcode &&
1573                     pctx.errcode != EXT2_ET_INODE_CSUM_INVALID &&
1574                     pctx.errcode != EXT2_ET_INODE_IS_GARBAGE) {
1575                         fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1576                         ctx->flags |= E2F_FLAG_ABORT;
1577                         goto endit;
1578                 }
1579                 if (!ino)
1580                         break;
1581                 pctx.ino = ino;
1582                 pctx.inode = inode;
1583                 ctx->stashed_ino = ino;
1584
1585                 /* Clear trashed inode? */
1586                 if (pctx.errcode == EXT2_ET_INODE_IS_GARBAGE &&
1587                     inode->i_links_count > 0 &&
1588                     fix_problem(ctx, PR_1_INODE_IS_GARBAGE, &pctx)) {
1589                         pctx.errcode = 0;
1590                         e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1591                 }
1592                 failed_csum = pctx.errcode != 0;
1593
1594                 /*
1595                  * Check for inodes who might have been part of the
1596                  * orphaned list linked list.  They should have gotten
1597                  * dealt with by now, unless the list had somehow been
1598                  * corrupted.
1599                  *
1600                  * FIXME: In the future, inodes which are still in use
1601                  * (and which are therefore) pending truncation should
1602                  * be handled specially.  Right now we just clear the
1603                  * dtime field, and the normal e2fsck handling of
1604                  * inodes where i_size and the inode blocks are
1605                  * inconsistent is to fix i_size, instead of releasing
1606                  * the extra blocks.  This won't catch the inodes that
1607                  * was at the end of the orphan list, but it's better
1608                  * than nothing.  The right answer is that there
1609                  * shouldn't be any bugs in the orphan list handling.  :-)
1610                  */
1611                 if (inode->i_dtime && low_dtime_check &&
1612                     inode->i_dtime < ctx->fs->super->s_inodes_count) {
1613                         if (fix_problem(ctx, PR_1_LOW_DTIME, &pctx)) {
1614                                 inode->i_dtime = inode->i_links_count ?
1615                                         0 : ctx->now;
1616                                 e2fsck_write_inode(ctx, ino, inode,
1617                                                    "pass1");
1618                                 failed_csum = 0;
1619                         }
1620                 }
1621
1622                 if (inode->i_links_count) {
1623                         pctx.errcode = ext2fs_icount_store(ctx->inode_link_info,
1624                                            ino, inode->i_links_count);
1625                         if (pctx.errcode) {
1626                                 pctx.num = inode->i_links_count;
1627                                 fix_problem(ctx, PR_1_ICOUNT_STORE, &pctx);
1628                                 ctx->flags |= E2F_FLAG_ABORT;
1629                                 goto endit;
1630                         }
1631                 } else if ((ino >= EXT2_FIRST_INODE(fs->super)) &&
1632                            !quota_inum_is_reserved(fs, ino)) {
1633                         if (!inode->i_dtime && inode->i_mode) {
1634                                 if (fix_problem(ctx,
1635                                             PR_1_ZERO_DTIME, &pctx)) {
1636                                         inode->i_dtime = ctx->now;
1637                                         e2fsck_write_inode(ctx, ino, inode,
1638                                                            "pass1");
1639                                         failed_csum = 0;
1640                                 }
1641                         }
1642                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1643                         continue;
1644                 }
1645
1646                 /* Conflicting inlinedata/extents inode flags? */
1647                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
1648                     (inode->i_flags & EXT4_EXTENTS_FL)) {
1649                         int res = fix_inline_data_extents_file(ctx, ino, inode,
1650                                                                inode_size,
1651                                                                &pctx);
1652                         if (res < 0) {
1653                                 /* skip FINISH_INODE_LOOP */
1654                                 continue;
1655                         }
1656                 }
1657
1658                 /* Test for incorrect inline_data flags settings. */
1659                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && !inlinedata_fs &&
1660                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1661                         size_t size = 0;
1662
1663                         pctx.errcode = ext2fs_inline_data_size(fs, ino, &size);
1664                         if (!pctx.errcode && size &&
1665                             fix_problem(ctx, PR_1_INLINE_DATA_FEATURE, &pctx)) {
1666                                 ext2fs_set_feature_inline_data(sb);
1667                                 ext2fs_mark_super_dirty(fs);
1668                                 inlinedata_fs = 1;
1669                         } else if (fix_problem(ctx, PR_1_INLINE_DATA_SET, &pctx)) {
1670                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1671                                 /* skip FINISH_INODE_LOOP */
1672                                 continue;
1673                         }
1674                 }
1675
1676                 /* Test for inline data flag but no attr */
1677                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && inlinedata_fs &&
1678                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1679                         size_t size = 0;
1680                         errcode_t err;
1681                         int flags;
1682
1683                         flags = fs->flags;
1684                         if (failed_csum)
1685                                 fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1686                         err = get_inline_data_ea_size(fs, ino, &size);
1687                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1688                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1689
1690                         switch (err) {
1691                         case 0:
1692                                 /* Everything is awesome... */
1693                                 break;
1694                         case EXT2_ET_BAD_EA_BLOCK_NUM:
1695                         case EXT2_ET_BAD_EA_HASH:
1696                         case EXT2_ET_BAD_EA_HEADER:
1697                         case EXT2_ET_EA_BAD_NAME_LEN:
1698                         case EXT2_ET_EA_BAD_VALUE_SIZE:
1699                         case EXT2_ET_EA_KEY_NOT_FOUND:
1700                         case EXT2_ET_EA_NO_SPACE:
1701                         case EXT2_ET_MISSING_EA_FEATURE:
1702                         case EXT2_ET_INLINE_DATA_CANT_ITERATE:
1703                         case EXT2_ET_INLINE_DATA_NO_BLOCK:
1704                         case EXT2_ET_INLINE_DATA_NO_SPACE:
1705                         case EXT2_ET_NO_INLINE_DATA:
1706                         case EXT2_ET_EXT_ATTR_CSUM_INVALID:
1707                         case EXT2_ET_EA_BAD_VALUE_OFFSET:
1708                         case EXT2_ET_EA_INODE_CORRUPTED:
1709                                 /* broken EA or no system.data EA; truncate */
1710                                 if (fix_problem(ctx, PR_1_INLINE_DATA_NO_ATTR,
1711                                                 &pctx)) {
1712                                         err = ext2fs_inode_size_set(fs, inode, 0);
1713                                         if (err) {
1714                                                 pctx.errcode = err;
1715                                                 ctx->flags |= E2F_FLAG_ABORT;
1716                                                 goto endit;
1717                                         }
1718                                         inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1719                                         memset(&inode->i_block, 0,
1720                                                sizeof(inode->i_block));
1721                                         e2fsck_write_inode(ctx, ino, inode,
1722                                                            "pass1");
1723                                         failed_csum = 0;
1724                                 }
1725                                 break;
1726                         default:
1727                                 /* Some other kind of non-xattr error? */
1728                                 pctx.errcode = err;
1729                                 ctx->flags |= E2F_FLAG_ABORT;
1730                                 goto endit;
1731                         }
1732                 }
1733
1734                 /*
1735                  * Test for incorrect extent flag settings.
1736                  *
1737                  * On big-endian machines we must be careful:
1738                  * When the inode is read, the i_block array is not swapped
1739                  * if the extent flag is set.  Therefore if we are testing
1740                  * for or fixing a wrongly-set flag, we must potentially
1741                  * (un)swap before testing, or after fixing.
1742                  */
1743
1744                 /*
1745                  * In this case the extents flag was set when read, so
1746                  * extent_header_verify is ok.  If the inode is cleared,
1747                  * no need to swap... so no extra swapping here.
1748                  */
1749                 if ((inode->i_flags & EXT4_EXTENTS_FL) && !extent_fs &&
1750                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1751                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO))) {
1752                         if ((ext2fs_extent_header_verify(inode->i_block,
1753                                                  sizeof(inode->i_block)) == 0) &&
1754                             fix_problem(ctx, PR_1_EXTENT_FEATURE, &pctx)) {
1755                                 ext2fs_set_feature_extents(sb);
1756                                 ext2fs_mark_super_dirty(fs);
1757                                 extent_fs = 1;
1758                         } else if (fix_problem(ctx, PR_1_EXTENTS_SET, &pctx)) {
1759                         clear_inode:
1760                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1761                                 if (ino == EXT2_BAD_INO)
1762                                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map,
1763                                                                  ino);
1764                                 /* skip FINISH_INODE_LOOP */
1765                                 continue;
1766                         }
1767                 }
1768
1769                 /*
1770                  * For big-endian machines:
1771                  * If the inode didn't have the extents flag set when it
1772                  * was read, then the i_blocks array was swapped.  To test
1773                  * as an extents header, we must swap it back first.
1774                  * IF we then set the extents flag, the entire i_block
1775                  * array must be un/re-swapped to make it proper extents data.
1776                  */
1777                 if (extent_fs && !(inode->i_flags & EXT4_EXTENTS_FL) &&
1778                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1779                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO)) &&
1780                     (LINUX_S_ISREG(inode->i_mode) ||
1781                      LINUX_S_ISDIR(inode->i_mode))) {
1782                         void *ehp;
1783 #ifdef WORDS_BIGENDIAN
1784                         __u32 tmp_block[EXT2_N_BLOCKS];
1785
1786                         for (i = 0; i < EXT2_N_BLOCKS; i++)
1787                                 tmp_block[i] = ext2fs_swab32(inode->i_block[i]);
1788                         ehp = tmp_block;
1789 #else
1790                         ehp = inode->i_block;
1791 #endif
1792                         if ((ext2fs_extent_header_verify(ehp,
1793                                          sizeof(inode->i_block)) == 0)) {
1794                                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
1795                                 if (fix_problem(ctx, PR_1_UNSET_EXTENT_FL,
1796                                                 &pctx)) {
1797                                         inode->i_flags |= EXT4_EXTENTS_FL;
1798 #ifdef WORDS_BIGENDIAN
1799                                         memcpy(inode->i_block, tmp_block,
1800                                                sizeof(inode->i_block));
1801 #endif
1802                                         e2fsck_write_inode(ctx, ino, inode,
1803                                                            "pass1");
1804                                         failed_csum = 0;
1805                                 }
1806                         }
1807                 }
1808
1809                 if (ino == EXT2_BAD_INO) {
1810                         struct process_block_struct pb;
1811
1812                         if ((failed_csum || inode->i_mode || inode->i_uid ||
1813                              inode->i_gid || inode->i_links_count ||
1814                              (inode->i_flags & EXT4_INLINE_DATA_FL) ||
1815                              inode->i_file_acl) &&
1816                             fix_problem(ctx, PR_1_INVALID_BAD_INODE, &pctx)) {
1817                                 memset(inode, 0, sizeof(struct ext2_inode));
1818                                 e2fsck_write_inode(ctx, ino, inode,
1819                                                    "clear bad inode");
1820                                 failed_csum = 0;
1821                         }
1822
1823                         pctx.errcode = ext2fs_copy_bitmap(ctx->block_found_map,
1824                                                           &pb.fs_meta_blocks);
1825                         if (pctx.errcode) {
1826                                 pctx.num = 4;
1827                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1828                                 ctx->flags |= E2F_FLAG_ABORT;
1829                                 goto endit;
1830                         }
1831                         pb.ino = EXT2_BAD_INO;
1832                         pb.num_blocks = pb.last_block = 0;
1833                         pb.last_db_block = -1;
1834                         pb.num_illegal_blocks = 0;
1835                         pb.suppress = 0; pb.clear = 0; pb.is_dir = 0;
1836                         pb.is_reg = 0; pb.fragmented = 0; pb.bbcheck = 0;
1837                         pb.inode = inode;
1838                         pb.pctx = &pctx;
1839                         pb.ctx = ctx;
1840                         pctx.errcode = ext2fs_block_iterate3(fs, ino, 0,
1841                                      block_buf, process_bad_block, &pb);
1842                         ext2fs_free_block_bitmap(pb.fs_meta_blocks);
1843                         if (pctx.errcode) {
1844                                 fix_problem(ctx, PR_1_BLOCK_ITERATE, &pctx);
1845                                 ctx->flags |= E2F_FLAG_ABORT;
1846                                 goto endit;
1847                         }
1848                         if (pb.bbcheck)
1849                                 if (!fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK_PROMPT, &pctx)) {
1850                                 ctx->flags |= E2F_FLAG_ABORT;
1851                                 goto endit;
1852                         }
1853                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1854                         clear_problem_context(&pctx);
1855                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1856                         continue;
1857                 } else if (ino == EXT2_ROOT_INO) {
1858                         /*
1859                          * Make sure the root inode is a directory; if
1860                          * not, offer to clear it.  It will be
1861                          * regenerated in pass #3.
1862                          */
1863                         if (!LINUX_S_ISDIR(inode->i_mode)) {
1864                                 if (fix_problem(ctx, PR_1_ROOT_NO_DIR, &pctx))
1865                                         goto clear_inode;
1866                         }
1867                         /*
1868                          * If dtime is set, offer to clear it.  mke2fs
1869                          * version 0.2b created filesystems with the
1870                          * dtime field set for the root and lost+found
1871                          * directories.  We won't worry about
1872                          * /lost+found, since that can be regenerated
1873                          * easily.  But we will fix the root directory
1874                          * as a special case.
1875                          */
1876                         if (inode->i_dtime && inode->i_links_count) {
1877                                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
1878                                 if (fix_problem(ctx, PR_1_ROOT_DTIME, &pctx)) {
1879                                         inode->i_dtime = 0;
1880                                         e2fsck_write_inode(ctx, ino, inode,
1881                                                            "pass1");
1882                                         failed_csum = 0;
1883                                 }
1884                         }
1885                 } else if (ino == EXT2_JOURNAL_INO) {
1886                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1887                         if (fs->super->s_journal_inum == EXT2_JOURNAL_INO) {
1888                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1889                                     fix_problem(ctx, PR_1_JOURNAL_BAD_MODE,
1890                                                 &pctx)) {
1891                                         inode->i_mode = LINUX_S_IFREG;
1892                                         e2fsck_write_inode(ctx, ino, inode,
1893                                                            "pass1");
1894                                         failed_csum = 0;
1895                                 }
1896                                 check_blocks(ctx, &pctx, block_buf, NULL);
1897                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1898                                 continue;
1899                         }
1900                         if ((inode->i_links_count ||
1901                              inode->i_blocks || inode->i_block[0]) &&
1902                             fix_problem(ctx, PR_1_JOURNAL_INODE_NOT_CLEAR,
1903                                         &pctx)) {
1904                                 memset(inode, 0, inode_size);
1905                                 ext2fs_icount_store(ctx->inode_link_info,
1906                                                     ino, 0);
1907                                 e2fsck_write_inode_full(ctx, ino, inode,
1908                                                         inode_size, "pass1");
1909                                 failed_csum = 0;
1910                         }
1911                 } else if (quota_inum_is_reserved(fs, ino)) {
1912                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1913                         if (ext2fs_has_feature_quota(fs->super) &&
1914                             quota_inum_is_super(fs->super, ino)) {
1915                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1916                                     fix_problem(ctx, PR_1_QUOTA_BAD_MODE,
1917                                                         &pctx)) {
1918                                         inode->i_mode = LINUX_S_IFREG;
1919                                         e2fsck_write_inode(ctx, ino, inode,
1920                                                         "pass1");
1921                                         failed_csum = 0;
1922                                 }
1923                                 check_blocks(ctx, &pctx, block_buf, NULL);
1924                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1925                                 continue;
1926                         }
1927                         if ((inode->i_links_count ||
1928                              inode->i_blocks || inode->i_block[0]) &&
1929                             fix_problem(ctx, PR_1_QUOTA_INODE_NOT_CLEAR,
1930                                         &pctx)) {
1931                                 memset(inode, 0, inode_size);
1932                                 ext2fs_icount_store(ctx->inode_link_info,
1933                                                     ino, 0);
1934                                 e2fsck_write_inode_full(ctx, ino, inode,
1935                                                         inode_size, "pass1");
1936                                 failed_csum = 0;
1937                         }
1938                 } else if (ino < EXT2_FIRST_INODE(fs->super)) {
1939                         problem_t problem = 0;
1940
1941                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1942                         if (ino == EXT2_BOOT_LOADER_INO) {
1943                                 if (LINUX_S_ISDIR(inode->i_mode))
1944                                         problem = PR_1_RESERVED_BAD_MODE;
1945                         } else if (ino == EXT2_RESIZE_INO) {
1946                                 if (inode->i_mode &&
1947                                     !LINUX_S_ISREG(inode->i_mode))
1948                                         problem = PR_1_RESERVED_BAD_MODE;
1949                         } else {
1950                                 if (inode->i_mode != 0)
1951                                         problem = PR_1_RESERVED_BAD_MODE;
1952                         }
1953                         if (problem) {
1954                                 if (fix_problem(ctx, problem, &pctx)) {
1955                                         inode->i_mode = 0;
1956                                         e2fsck_write_inode(ctx, ino, inode,
1957                                                            "pass1");
1958                                         failed_csum = 0;
1959                                 }
1960                         }
1961                         check_blocks(ctx, &pctx, block_buf, NULL);
1962                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1963                         continue;
1964                 }
1965
1966                 if (!inode->i_links_count) {
1967                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1968                         continue;
1969                 }
1970                 /*
1971                  * n.b.  0.3c ext2fs code didn't clear i_links_count for
1972                  * deleted files.  Oops.
1973                  *
1974                  * Since all new ext2 implementations get this right,
1975                  * we now assume that the case of non-zero
1976                  * i_links_count and non-zero dtime means that we
1977                  * should keep the file, not delete it.
1978                  *
1979                  */
1980                 if (inode->i_dtime) {
1981                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
1982                         if (fix_problem(ctx, PR_1_SET_DTIME, &pctx)) {
1983                                 inode->i_dtime = 0;
1984                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1985                                 failed_csum = 0;
1986                         }
1987                 }
1988
1989                 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1990                 switch (fs->super->s_creator_os) {
1991                     case EXT2_OS_HURD:
1992                         frag = inode->osd2.hurd2.h_i_frag;
1993                         fsize = inode->osd2.hurd2.h_i_fsize;
1994                         break;
1995                     default:
1996                         frag = fsize = 0;
1997                 }
1998
1999                 /* Fixed in pass2, e2fsck_process_bad_inode(). */
2000                 if (inode->i_faddr || frag || fsize ||
2001                     (!ext2fs_has_feature_largedir(fs->super) &&
2002                     (LINUX_S_ISDIR(inode->i_mode) && inode->i_size_high)))
2003                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2004                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
2005                     !ext2fs_has_feature_64bit(fs->super) &&
2006                     inode->osd2.linux2.l_i_file_acl_high != 0)
2007                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2008                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
2009                     !ext2fs_has_feature_huge_file(fs->super) &&
2010                     (inode->osd2.linux2.l_i_blocks_hi != 0))
2011                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2012                 if (inode->i_flags & EXT2_IMAGIC_FL) {
2013                         if (imagic_fs) {
2014                                 if (!ctx->inode_imagic_map)
2015                                         alloc_imagic_map(ctx);
2016                                 ext2fs_mark_inode_bitmap2(ctx->inode_imagic_map,
2017                                                          ino);
2018                         } else {
2019                                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2020                                 if (fix_problem(ctx, PR_1_SET_IMAGIC, &pctx)) {
2021                                         inode->i_flags &= ~EXT2_IMAGIC_FL;
2022                                         e2fsck_write_inode(ctx, ino,
2023                                                            inode, "pass1");
2024                                         failed_csum = 0;
2025                                 }
2026                         }
2027                 }
2028
2029                 check_inode_extra_space(ctx, &pctx, &ea_ibody_quota);
2030                 check_is_really_dir(ctx, &pctx, block_buf);
2031
2032                 /*
2033                  * ext2fs_inode_has_valid_blocks2 does not actually look
2034                  * at i_block[] values, so not endian-sensitive here.
2035                  */
2036                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL) &&
2037                     LINUX_S_ISLNK(inode->i_mode) &&
2038                     !ext2fs_inode_has_valid_blocks2(fs, inode) &&
2039                     fix_problem(ctx, PR_1_FAST_SYMLINK_EXTENT_FL, &pctx)) {
2040                         inode->i_flags &= ~EXT4_EXTENTS_FL;
2041                         e2fsck_write_inode(ctx, ino, inode, "pass1");
2042                         failed_csum = 0;
2043                 }
2044
2045                 if (LINUX_S_ISDIR(inode->i_mode)) {
2046                         ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
2047                         e2fsck_add_dir_info(ctx, ino, 0);
2048                         ctx->fs_directory_count++;
2049                         if (inode->i_flags & EXT4_ENCRYPT_FL)
2050                                 add_encrypted_dir(ctx, ino);
2051                 } else if (LINUX_S_ISREG (inode->i_mode)) {
2052                         ext2fs_mark_inode_bitmap2(ctx->inode_reg_map, ino);
2053                         ctx->fs_regular_count++;
2054                 } else if (LINUX_S_ISCHR (inode->i_mode) &&
2055                            e2fsck_pass1_check_device_inode(fs, inode)) {
2056                         check_extents_inlinedata(ctx, &pctx);
2057                         check_immutable(ctx, &pctx);
2058                         check_size(ctx, &pctx);
2059                         ctx->fs_chardev_count++;
2060                 } else if (LINUX_S_ISBLK (inode->i_mode) &&
2061                            e2fsck_pass1_check_device_inode(fs, inode)) {
2062                         check_extents_inlinedata(ctx, &pctx);
2063                         check_immutable(ctx, &pctx);
2064                         check_size(ctx, &pctx);
2065                         ctx->fs_blockdev_count++;
2066                 } else if (LINUX_S_ISLNK (inode->i_mode) &&
2067                            e2fsck_pass1_check_symlink(fs, ino, inode,
2068                                                       block_buf)) {
2069                         check_immutable(ctx, &pctx);
2070                         ctx->fs_symlinks_count++;
2071                         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
2072                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
2073                                 continue;
2074                         } else if (ext2fs_is_fast_symlink(inode)) {
2075                                 ctx->fs_fast_symlinks_count++;
2076                                 check_blocks(ctx, &pctx, block_buf,
2077                                              &ea_ibody_quota);
2078                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
2079                                 continue;
2080                         }
2081                 }
2082                 else if (LINUX_S_ISFIFO (inode->i_mode) &&
2083                          e2fsck_pass1_check_device_inode(fs, inode)) {
2084                         check_extents_inlinedata(ctx, &pctx);
2085                         check_immutable(ctx, &pctx);
2086                         check_size(ctx, &pctx);
2087                         ctx->fs_fifo_count++;
2088                 } else if ((LINUX_S_ISSOCK (inode->i_mode)) &&
2089                            e2fsck_pass1_check_device_inode(fs, inode)) {
2090                         check_extents_inlinedata(ctx, &pctx);
2091                         check_immutable(ctx, &pctx);
2092                         check_size(ctx, &pctx);
2093                         ctx->fs_sockets_count++;
2094                 } else {
2095                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2096                 }
2097
2098                 if (EXT4_XTIME_FUTURE(ctx, sb, inode->i_atime, ctx->time_fudge))
2099                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2100                 else if (EXT4_XTIME_FUTURE(ctx, sb, inode->i_mtime,
2101                                            ctx->time_fudge))
2102                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2103
2104                 if (EXT4_XTIME_FUTURE(ctx, sb, inode->i_ctime, ctx->time_fudge))
2105                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_HIGH);
2106                 else if (EXT4_XTIME_ANCIENT(ctx, sb, inode->i_ctime,
2107                                             ctx->time_fudge))
2108                         e2fsck_mark_inode_bad(ctx, ino, BADNESS_HIGH);
2109
2110                 /* i_crtime is checked in check_inode_extra_space() */
2111
2112                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
2113                     !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
2114                         if (inode->i_block[EXT2_IND_BLOCK])
2115                                 ctx->fs_ind_count++;
2116                         if (inode->i_block[EXT2_DIND_BLOCK])
2117                                 ctx->fs_dind_count++;
2118                         if (inode->i_block[EXT2_TIND_BLOCK])
2119                                 ctx->fs_tind_count++;
2120                 }
2121                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
2122                     !(inode->i_flags & EXT4_INLINE_DATA_FL) &&
2123                     (inode->i_block[EXT2_IND_BLOCK] ||
2124                      inode->i_block[EXT2_DIND_BLOCK] ||
2125                      inode->i_block[EXT2_TIND_BLOCK] ||
2126                      ext2fs_file_acl_block(fs, inode))) {
2127                         struct process_inode_block *itp;
2128
2129                         itp = &inodes_to_process[process_inode_count];
2130                         itp->ino = ino;
2131                         itp->ea_ibody_quota = ea_ibody_quota;
2132                         if (inode_size < sizeof(struct ext2_inode_large))
2133                                 memcpy(&itp->inode, inode, inode_size);
2134                         else
2135                                 memcpy(&itp->inode, inode, sizeof(itp->inode));
2136                         process_inode_count++;
2137                 } else
2138                         check_blocks(ctx, &pctx, block_buf, &ea_ibody_quota);
2139
2140                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
2141
2142                 if (ctx->flags & E2F_FLAG_EXPAND_EISIZE) {
2143                         struct ext2_inode_large *inode_l;
2144
2145                         inode_l = (struct ext2_inode_large *)inode;
2146
2147                         if (inode_l->i_extra_isize < ctx->want_extra_isize) {
2148                                 fix_problem(ctx, PR_1_EXPAND_EISIZE, &pctx);
2149                                 inode_exp = e2fsck_pass1_expand_eisize(ctx,
2150                                                                        inode_l,
2151                                                                        &pctx);
2152                         }
2153                         if ((inode_l->i_extra_isize < ctx->min_extra_isize) &&
2154                             inode_exp == 0)
2155                                 ctx->min_extra_isize = inode_l->i_extra_isize;
2156                 }
2157
2158                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2159                         goto endit;
2160
2161                 if (process_inode_count >= ctx->process_inode_size) {
2162                         process_inodes(ctx, block_buf);
2163
2164                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2165                                 goto endit;
2166                 }
2167         }
2168         process_inodes(ctx, block_buf);
2169         ext2fs_close_inode_scan(scan);
2170         scan = NULL;
2171
2172         reserve_block_for_root_repair(ctx);
2173         reserve_block_for_lnf_repair(ctx);
2174
2175         /*
2176          * If any extended attribute blocks' reference counts need to
2177          * be adjusted, either up (ctx->refcount_extra), or down
2178          * (ctx->refcount), then fix them.
2179          */
2180         if (ctx->refcount) {
2181                 adjust_extattr_refcount(ctx, ctx->refcount, block_buf, -1);
2182                 ea_refcount_free(ctx->refcount);
2183                 ctx->refcount = 0;
2184         }
2185         if (ctx->refcount_extra) {
2186                 adjust_extattr_refcount(ctx, ctx->refcount_extra,
2187                                         block_buf, +1);
2188                 ea_refcount_free(ctx->refcount_extra);
2189                 ctx->refcount_extra = 0;
2190         }
2191
2192         if (ctx->ea_block_quota_blocks) {
2193                 ea_refcount_free(ctx->ea_block_quota_blocks);
2194                 ctx->ea_block_quota_blocks = 0;
2195         }
2196
2197         if (ctx->ea_block_quota_inodes) {
2198                 ea_refcount_free(ctx->ea_block_quota_inodes);
2199                 ctx->ea_block_quota_inodes = 0;
2200         }
2201
2202         if (ctx->invalid_bitmaps)
2203                 handle_fs_bad_blocks(ctx);
2204
2205         /* We don't need the block_ea_map any more */
2206         if (ctx->block_ea_map) {
2207                 ext2fs_free_block_bitmap(ctx->block_ea_map);
2208                 ctx->block_ea_map = 0;
2209         }
2210
2211         if (ctx->flags & E2F_FLAG_RESIZE_INODE) {
2212                 clear_problem_context(&pctx);
2213                 pctx.errcode = ext2fs_create_resize_inode(fs);
2214                 if (pctx.errcode) {
2215                         if (!fix_problem(ctx, PR_1_RESIZE_INODE_CREATE,
2216                                          &pctx)) {
2217                                 ctx->flags |= E2F_FLAG_ABORT;
2218                                 goto endit;
2219                         }
2220                         pctx.errcode = 0;
2221                 }
2222                 if (!pctx.errcode) {
2223                         e2fsck_read_inode(ctx, EXT2_RESIZE_INO, inode,
2224                                           "recreate inode");
2225                         inode->i_mtime = ctx->now;
2226                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, inode,
2227                                            "recreate inode");
2228                 }
2229                 ctx->flags &= ~E2F_FLAG_RESIZE_INODE;
2230         }
2231
2232         if (ctx->flags & E2F_FLAG_RESTART) {
2233                 /*
2234                  * Only the master copy of the superblock and block
2235                  * group descriptors are going to be written during a
2236                  * restart, so set the superblock to be used to be the
2237                  * master superblock.
2238                  */
2239                 ctx->use_superblock = 0;
2240                 unwind_pass1(fs);
2241                 goto endit;
2242         }
2243
2244         if (ctx->block_dup_map) {
2245                 if (ctx->options & E2F_OPT_PREEN) {
2246                         clear_problem_context(&pctx);
2247                         fix_problem(ctx, PR_1_DUP_BLOCKS_PREENSTOP, &pctx);
2248                 }
2249                 e2fsck_pass1_dupblocks(ctx, block_buf);
2250         }
2251         ctx->flags |= E2F_FLAG_ALLOC_OK;
2252         ext2fs_free_mem(&inodes_to_process);
2253 endit:
2254         e2fsck_use_inode_shortcuts(ctx, 0);
2255
2256         if (scan)
2257                 ext2fs_close_inode_scan(scan);
2258         if (block_buf)
2259                 ext2fs_free_mem(&block_buf);
2260         if (inode)
2261                 ext2fs_free_mem(&inode);
2262
2263         /*
2264          * The l+f inode may have been cleared, so zap it now and
2265          * later passes will recalculate it if necessary
2266          */
2267         ctx->lost_and_found = 0;
2268
2269         if ((ctx->flags & E2F_FLAG_SIGNAL_MASK) == 0)
2270                 print_resource_track(ctx, _("Pass 1"), &rtrack, ctx->fs->io);
2271         else
2272                 ctx->invalid_bitmaps++;
2273 }
2274 #undef FINISH_INODE_LOOP
2275
2276 /*
2277  * When the inode_scan routines call this callback at the end of the
2278  * glock group, call process_inodes.
2279  */
2280 static errcode_t scan_callback(ext2_filsys fs,
2281                                ext2_inode_scan scan EXT2FS_ATTR((unused)),
2282                                dgrp_t group, void * priv_data)
2283 {
2284         struct scan_callback_struct *scan_struct;
2285         e2fsck_t ctx;
2286
2287         scan_struct = (struct scan_callback_struct *) priv_data;
2288         ctx = scan_struct->ctx;
2289
2290         process_inodes((e2fsck_t) fs->priv_data, scan_struct->block_buf);
2291
2292         if (ctx->progress)
2293                 if ((ctx->progress)(ctx, 1, group+1,
2294                                     ctx->fs->group_desc_count))
2295                         return EXT2_ET_CANCEL_REQUESTED;
2296
2297         return 0;
2298 }
2299
2300 /*
2301  * Process the inodes in the "inodes to process" list.
2302  */
2303 static void process_inodes(e2fsck_t ctx, char *block_buf)
2304 {
2305         int                     i;
2306         struct ext2_inode       *old_stashed_inode;
2307         ext2_ino_t              old_stashed_ino;
2308         const char              *old_operation;
2309         char                    buf[80];
2310         struct problem_context  pctx;
2311
2312 #if 0
2313         printf("begin process_inodes: ");
2314 #endif
2315         if (process_inode_count == 0)
2316                 return;
2317         old_operation = ehandler_operation(0);
2318         old_stashed_inode = ctx->stashed_inode;
2319         old_stashed_ino = ctx->stashed_ino;
2320         qsort(inodes_to_process, process_inode_count,
2321                       sizeof(struct process_inode_block), process_inode_cmp);
2322         clear_problem_context(&pctx);
2323         for (i=0; i < process_inode_count; i++) {
2324                 pctx.inode = ctx->stashed_inode =
2325                         (struct ext2_inode *) &inodes_to_process[i].inode;
2326                 pctx.ino = ctx->stashed_ino = inodes_to_process[i].ino;
2327
2328 #if 0
2329                 printf("%u ", pctx.ino);
2330 #endif
2331                 sprintf(buf, _("reading indirect blocks of inode %u"),
2332                         pctx.ino);
2333                 ehandler_operation(buf);
2334                 check_blocks(ctx, &pctx, block_buf,
2335                              &inodes_to_process[i].ea_ibody_quota);
2336                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2337                         break;
2338         }
2339         ctx->stashed_inode = old_stashed_inode;
2340         ctx->stashed_ino = old_stashed_ino;
2341         process_inode_count = 0;
2342 #if 0
2343         printf("end process inodes\n");
2344 #endif
2345         ehandler_operation(old_operation);
2346 }
2347
2348 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b)
2349 {
2350         const struct process_inode_block *ib_a =
2351                 (const struct process_inode_block *) a;
2352         const struct process_inode_block *ib_b =
2353                 (const struct process_inode_block *) b;
2354         int     ret;
2355
2356         ret = (ib_a->inode.i_block[EXT2_IND_BLOCK] -
2357                ib_b->inode.i_block[EXT2_IND_BLOCK]);
2358         if (ret == 0)
2359                 /*
2360                  * We only call process_inodes() for non-extent
2361                  * inodes, so it's OK to pass NULL to
2362                  * ext2fs_file_acl_block() here.
2363                  */
2364                 ret = ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_a->inode)) -
2365                         ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_b->inode));
2366         if (ret == 0)
2367                 ret = ib_a->ino - ib_b->ino;
2368         return ret;
2369 }
2370
2371 /*
2372  * Mark an inode as being bad and increment its badness counter.
2373  */
2374 void e2fsck_mark_inode_bad_loc(e2fsck_t ctx, ino_t ino, int count,
2375                                const char *func, const int line)
2376 {
2377         struct          problem_context pctx;
2378         __u16           result;
2379
2380         if (!ctx->inode_badness) {
2381                 clear_problem_context(&pctx);
2382
2383                 pctx.errcode = ext2fs_create_icount2(ctx->fs, 0, 0, NULL,
2384                                                      &ctx->inode_badness);
2385                 if (pctx.errcode) {
2386                         fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
2387                         ctx->flags |= E2F_FLAG_ABORT;
2388                         return;
2389                 }
2390         }
2391         ext2fs_icount_fetch(ctx->inode_badness, ino, &result);
2392         ext2fs_icount_store(ctx->inode_badness, ino, count + result);
2393
2394         if (ctx->options & E2F_OPT_DEBUG)
2395                 fprintf(stderr, "%s:%d: increase inode %lu badness %u to %u\n",
2396                         func, line, (unsigned long)ino, result, count + result);
2397 }
2398
2399 static void add_encrypted_dir(e2fsck_t ctx, ino_t ino)
2400 {
2401         struct          problem_context pctx;
2402
2403         if (!ctx->encrypted_dirs) {
2404                 pctx.errcode = ext2fs_u32_list_create(&ctx->encrypted_dirs, 0);
2405                 if (pctx.errcode)
2406                         goto error;
2407         }
2408         pctx.errcode = ext2fs_u32_list_add(ctx->encrypted_dirs, ino);
2409         if (pctx.errcode == 0)
2410                 return;
2411 error:
2412         fix_problem(ctx, PR_1_ALLOCATE_ENCRYPTED_DIRLIST, &pctx);
2413         /* Should never get here */
2414         ctx->flags |= E2F_FLAG_ABORT;
2415 }
2416
2417 /*
2418  * This procedure will allocate the inode "bb" (badblock) map table
2419  */
2420 static void alloc_bb_map(e2fsck_t ctx)
2421 {
2422         struct          problem_context pctx;
2423
2424         clear_problem_context(&pctx);
2425         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2426                         _("inode in bad block map"), EXT2FS_BMAP64_RBTREE,
2427                         "inode_bb_map", &ctx->inode_bb_map);
2428         if (pctx.errcode) {
2429                 pctx.num = 4;
2430                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2431                 /* Should never get here */
2432                 ctx->flags |= E2F_FLAG_ABORT;
2433                 return;
2434         }
2435 }
2436
2437 /*
2438  * This procedure will allocate the inode imagic table
2439  */
2440 static void alloc_imagic_map(e2fsck_t ctx)
2441 {
2442         struct          problem_context pctx;
2443
2444         clear_problem_context(&pctx);
2445         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2446                         _("imagic inode map"), EXT2FS_BMAP64_RBTREE,
2447                         "inode_imagic_map", &ctx->inode_imagic_map);
2448         if (pctx.errcode) {
2449                 pctx.num = 5;
2450                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2451                 /* Should never get here */
2452                 ctx->flags |= E2F_FLAG_ABORT;
2453                 return;
2454         }
2455 }
2456
2457 /*
2458  * Marks a block as in use, setting the dup_map if it's been set
2459  * already.  Called by process_block and process_bad_block.
2460  *
2461  * WARNING: Assumes checks have already been done to make sure block
2462  * is valid.  This is true in both process_block and process_bad_block.
2463  */
2464 static _INLINE_ void mark_block_used(e2fsck_t ctx, blk64_t block)
2465 {
2466         struct          problem_context pctx;
2467
2468         clear_problem_context(&pctx);
2469
2470         if (ext2fs_fast_test_block_bitmap2(ctx->block_found_map, block)) {
2471                 if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2472                     !(ctx->options & E2F_OPT_UNSHARE_BLOCKS)) {
2473                         return;
2474                 }
2475                 if (!ctx->block_dup_map) {
2476                         pctx.errcode = e2fsck_allocate_block_bitmap(ctx->fs,
2477                                         _("multiply claimed block map"),
2478                                         EXT2FS_BMAP64_RBTREE, "block_dup_map",
2479                                         &ctx->block_dup_map);
2480                         if (pctx.errcode) {
2481                                 pctx.num = 3;
2482                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR,
2483                                             &pctx);
2484                                 /* Should never get here */
2485                                 ctx->flags |= E2F_FLAG_ABORT;
2486                                 return;
2487                         }
2488                 }
2489                 ext2fs_fast_mark_block_bitmap2(ctx->block_dup_map, block);
2490         } else {
2491                 ext2fs_fast_mark_block_bitmap2(ctx->block_found_map, block);
2492         }
2493 }
2494
2495 /*
2496  * When cluster size is greater than one block, it is caller's responsibility
2497  * to make sure block parameter starts at a cluster boundary.
2498  */
2499 static _INLINE_ void mark_blocks_used(e2fsck_t ctx, blk64_t block,
2500                                       unsigned int num)
2501 {
2502         if (ext2fs_test_block_bitmap_range2(ctx->block_found_map, block, num))
2503                 ext2fs_mark_block_bitmap_range2(ctx->block_found_map, block, num);
2504         else {
2505                 unsigned int i;
2506
2507                 for (i = 0; i < num; i += EXT2FS_CLUSTER_RATIO(ctx->fs))
2508                         mark_block_used(ctx, block + i);
2509         }
2510 }
2511
2512 /*
2513  * Adjust the extended attribute block's reference counts at the end
2514  * of pass 1, either by subtracting out references for EA blocks that
2515  * are still referenced in ctx->refcount, or by adding references for
2516  * EA blocks that had extra references as accounted for in
2517  * ctx->refcount_extra.
2518  */
2519 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
2520                                     char *block_buf, int adjust_sign)
2521 {
2522         struct ext2_ext_attr_header     *header;
2523         struct problem_context          pctx;
2524         ext2_filsys                     fs = ctx->fs;
2525         blk64_t                         blk;
2526         __u32                           should_be;
2527         ea_value_t                      count;
2528
2529         clear_problem_context(&pctx);
2530
2531         ea_refcount_intr_begin(refcount);
2532         while (1) {
2533                 if ((blk = ea_refcount_intr_next(refcount, &count)) == 0)
2534                         break;
2535                 pctx.blk = blk;
2536                 pctx.errcode = ext2fs_read_ext_attr3(fs, blk, block_buf,
2537                                                      pctx.ino);
2538                 /* We already checked this block, shouldn't happen */
2539                 if (pctx.errcode) {
2540                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
2541                         return;
2542                 }
2543                 header = BHDR(block_buf);
2544                 if (header->h_magic != EXT2_EXT_ATTR_MAGIC) {
2545                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
2546                         return;
2547                 }
2548
2549                 pctx.blkcount = header->h_refcount;
2550                 should_be = header->h_refcount + adjust_sign * (int)count;
2551                 pctx.num = should_be;
2552                 if (fix_problem(ctx, PR_1_EXTATTR_REFCOUNT, &pctx)) {
2553                         header->h_refcount = should_be;
2554                         pctx.errcode = ext2fs_write_ext_attr3(fs, blk,
2555                                                              block_buf,
2556                                                              pctx.ino);
2557                         if (pctx.errcode) {
2558                                 fix_problem(ctx, PR_1_EXTATTR_WRITE_ABORT,
2559                                             &pctx);
2560                                 continue;
2561                         }
2562                 }
2563         }
2564 }
2565
2566 /*
2567  * Handle processing the extended attribute blocks
2568  */
2569 static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx,
2570                            char *block_buf, struct ea_quota *ea_block_quota)
2571 {
2572         ext2_filsys fs = ctx->fs;
2573         ext2_ino_t      ino = pctx->ino;
2574         struct ext2_inode *inode = pctx->inode;
2575         blk64_t         blk;
2576         char *          end;
2577         struct ext2_ext_attr_header *header;
2578         struct ext2_ext_attr_entry *first, *entry;
2579         blk64_t         quota_blocks = EXT2FS_C2B(fs, 1);
2580         __u64           quota_inodes = 0;
2581         region_t        region = 0;
2582         int             failed_csum = 0;
2583
2584         ea_block_quota->blocks = 0;
2585         ea_block_quota->inodes = 0;
2586
2587         blk = ext2fs_file_acl_block(fs, inode);
2588         if (blk == 0)
2589                 return 0;
2590
2591         /*
2592          * If the Extended attribute flag isn't set, then a non-zero
2593          * file acl means that the inode is corrupted.
2594          *
2595          * Or if the extended attribute block is an invalid block,
2596          * then the inode is also corrupted.
2597          */
2598         if (!ext2fs_has_feature_xattr(fs->super) ||
2599             (blk < fs->super->s_first_data_block) ||
2600             (blk >= ext2fs_blocks_count(fs->super))) {
2601                 /* Fixed in pass2, e2fsck_process_bad_inode(). */
2602                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2603                 return 0;
2604         }
2605
2606         /* If ea bitmap hasn't been allocated, create it */
2607         if (!ctx->block_ea_map) {
2608                 pctx->errcode = e2fsck_allocate_block_bitmap(fs,
2609                                         _("ext attr block map"),
2610                                         EXT2FS_BMAP64_RBTREE, "block_ea_map",
2611                                         &ctx->block_ea_map);
2612                 if (pctx->errcode) {
2613                         pctx->num = 2;
2614                         fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, pctx);
2615                         ctx->flags |= E2F_FLAG_ABORT;
2616                         return 0;
2617                 }
2618         }
2619
2620         /* Create the EA refcount structure if necessary */
2621         if (!ctx->refcount) {
2622                 pctx->errcode = ea_refcount_create(0, &ctx->refcount);
2623                 if (pctx->errcode) {
2624                         pctx->num = 1;
2625                         fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2626                         ctx->flags |= E2F_FLAG_ABORT;
2627                         return 0;
2628                 }
2629         }
2630
2631 #if 0
2632         /* Debugging text */
2633         printf("Inode %u has EA block %u\n", ino, blk);
2634 #endif
2635
2636         /* Have we seen this EA block before? */
2637         if (ext2fs_fast_test_block_bitmap2(ctx->block_ea_map, blk)) {
2638                 ea_block_quota->blocks = EXT2FS_C2B(fs, 1);
2639                 ea_block_quota->inodes = 0;
2640
2641                 if (ctx->ea_block_quota_blocks) {
2642                         ea_refcount_fetch(ctx->ea_block_quota_blocks, blk,
2643                                           &quota_blocks);
2644                         if (quota_blocks)
2645                                 ea_block_quota->blocks = quota_blocks;
2646                 }
2647
2648                 if (ctx->ea_block_quota_inodes)
2649                         ea_refcount_fetch(ctx->ea_block_quota_inodes, blk,
2650                                           &ea_block_quota->inodes);
2651
2652                 if (ea_refcount_decrement(ctx->refcount, blk, 0) == 0)
2653                         return 1;
2654                 /* Ooops, this EA was referenced more than it stated */
2655                 if (!ctx->refcount_extra) {
2656                         pctx->errcode = ea_refcount_create(0,
2657                                            &ctx->refcount_extra);
2658                         if (pctx->errcode) {
2659                                 pctx->num = 2;
2660                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2661                                 ctx->flags |= E2F_FLAG_ABORT;
2662                                 return 0;
2663                         }
2664                 }
2665                 ea_refcount_increment(ctx->refcount_extra, blk, 0);
2666                 return 1;
2667         }
2668
2669         /*
2670          * OK, we haven't seen this EA block yet.  So we need to
2671          * validate it
2672          */
2673         pctx->blk = blk;
2674         pctx->errcode = ext2fs_read_ext_attr3(fs, blk, block_buf, pctx->ino);
2675         if (pctx->errcode == EXT2_ET_EXT_ATTR_CSUM_INVALID) {
2676                 pctx->errcode = 0;
2677                 failed_csum = 1;
2678         } else if (pctx->errcode == EXT2_ET_BAD_EA_HEADER)
2679                 pctx->errcode = 0;
2680
2681         if (pctx->errcode &&
2682             fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx)) {
2683                 pctx->errcode = 0;
2684                 goto clear_extattr;
2685         }
2686         header = BHDR(block_buf);
2687         pctx->blk = ext2fs_file_acl_block(fs, inode);
2688         if (((ctx->ext_attr_ver == 1) &&
2689              (header->h_magic != EXT2_EXT_ATTR_MAGIC_v1)) ||
2690             ((ctx->ext_attr_ver == 2) &&
2691              (header->h_magic != EXT2_EXT_ATTR_MAGIC))) {
2692                 if (fix_problem(ctx, PR_1_BAD_EA_BLOCK, pctx))
2693                         goto clear_extattr;
2694         }
2695
2696         if (header->h_blocks != 1) {
2697                 if (fix_problem(ctx, PR_1_EA_MULTI_BLOCK, pctx))
2698                         goto clear_extattr;
2699         }
2700
2701         if (pctx->errcode && fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx))
2702                 goto clear_extattr;
2703
2704         region = region_create(0, fs->blocksize);
2705         if (!region) {
2706                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
2707                 ctx->flags |= E2F_FLAG_ABORT;
2708                 return 0;
2709         }
2710         if (region_allocate(region, 0, sizeof(struct ext2_ext_attr_header))) {
2711                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2712                         goto clear_extattr;
2713         }
2714
2715         first = (struct ext2_ext_attr_entry *)(header+1);
2716         end = block_buf + fs->blocksize;
2717         entry = first;
2718         while ((char *)entry < end && *(__u32 *)entry) {
2719                 __u32 hash;
2720
2721                 if (region_allocate(region, (char *)entry - (char *)header,
2722                                    EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
2723                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2724                                 goto clear_extattr;
2725                         break;
2726                 }
2727                 if ((ctx->ext_attr_ver == 1 &&
2728                      (entry->e_name_len == 0 || entry->e_name_index != 0)) ||
2729                     (ctx->ext_attr_ver == 2 &&
2730                      entry->e_name_index == 0)) {
2731                         if (fix_problem(ctx, PR_1_EA_BAD_NAME, pctx))
2732                                 goto clear_extattr;
2733                         break;
2734                 }
2735                 if (entry->e_value_inum == 0) {
2736                         if (entry->e_value_offs + entry->e_value_size >
2737                             fs->blocksize) {
2738                                 if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2739                                         goto clear_extattr;
2740                                 break;
2741                         }
2742                         if (entry->e_value_size &&
2743                             region_allocate(region, entry->e_value_offs,
2744                                             EXT2_EXT_ATTR_SIZE(entry->e_value_size))) {
2745                                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION,
2746                                                 pctx))
2747                                         goto clear_extattr;
2748                         }
2749
2750                         hash = ext2fs_ext_attr_hash_entry(entry, block_buf +
2751                                                           entry->e_value_offs);
2752
2753                         if (entry->e_hash != hash) {
2754                                 pctx->num = entry->e_hash;
2755                                 if (fix_problem(ctx, PR_1_ATTR_HASH, pctx))
2756                                         goto clear_extattr;
2757                                 entry->e_hash = hash;
2758                         }
2759                 } else {
2760                         problem_t problem;
2761                         blk64_t entry_quota_blocks;
2762
2763                         problem = check_large_ea_inode(ctx, entry, pctx,
2764                                                        &entry_quota_blocks);
2765                         if (problem && fix_problem(ctx, problem, pctx))
2766                                 goto clear_extattr;
2767
2768                         quota_blocks += entry_quota_blocks;
2769                         quota_inodes++;
2770                 }
2771
2772                 entry = EXT2_EXT_ATTR_NEXT(entry);
2773         }
2774         if (region_allocate(region, (char *)entry - (char *)header, 4)) {
2775                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2776                         goto clear_extattr;
2777         }
2778         region_free(region);
2779
2780         /*
2781          * We only get here if there was no other errors that were fixed.
2782          * If there was a checksum fail, ask to correct it.
2783          */
2784         if (failed_csum &&
2785             fix_problem(ctx, PR_1_EA_BLOCK_ONLY_CSUM_INVALID, pctx)) {
2786                 pctx->errcode = ext2fs_write_ext_attr3(fs, blk, block_buf,
2787                                                        pctx->ino);
2788                 if (pctx->errcode)
2789                         return 0;
2790         }
2791
2792         if (quota_blocks != EXT2FS_C2B(fs, 1U)) {
2793                 if (!ctx->ea_block_quota_blocks) {
2794                         pctx->errcode = ea_refcount_create(0,
2795                                                 &ctx->ea_block_quota_blocks);
2796                         if (pctx->errcode) {
2797                                 pctx->num = 3;
2798                                 goto refcount_fail;
2799                         }
2800                 }
2801                 ea_refcount_store(ctx->ea_block_quota_blocks, blk,
2802                                   quota_blocks);
2803         }
2804
2805         if (quota_inodes) {
2806                 if (!ctx->ea_block_quota_inodes) {
2807                         pctx->errcode = ea_refcount_create(0,
2808                                                 &ctx->ea_block_quota_inodes);
2809                         if (pctx->errcode) {
2810                                 pctx->num = 4;
2811 refcount_fail:
2812                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2813                                 ctx->flags |= E2F_FLAG_ABORT;
2814                                 return 0;
2815                         }
2816                 }
2817
2818                 ea_refcount_store(ctx->ea_block_quota_inodes, blk,
2819                                   quota_inodes);
2820         }
2821         ea_block_quota->blocks = quota_blocks;
2822         ea_block_quota->inodes = quota_inodes;
2823
2824         inc_ea_inode_refs(ctx, pctx, first, end);
2825         ea_refcount_store(ctx->refcount, blk, header->h_refcount - 1);
2826         mark_block_used(ctx, blk);
2827         ext2fs_fast_mark_block_bitmap2(ctx->block_ea_map, blk);
2828         return 1;
2829
2830 clear_extattr:
2831         if (region)
2832                 region_free(region);
2833         ext2fs_file_acl_block_set(fs, inode, 0);
2834         e2fsck_write_inode(ctx, ino, inode, "check_ext_attr");
2835         return 0;
2836 }
2837
2838 /* Returns 1 if bad htree, 0 if OK */
2839 static int handle_htree(e2fsck_t ctx, struct problem_context *pctx,
2840                         ext2_ino_t ino, struct ext2_inode *inode,
2841                         char *block_buf)
2842 {
2843         struct ext2_dx_root_info        *root;
2844         ext2_filsys                     fs = ctx->fs;
2845         errcode_t                       retval;
2846         blk64_t                         blk;
2847
2848         if ((!LINUX_S_ISDIR(inode->i_mode) &&
2849              fix_problem(ctx, PR_1_HTREE_NODIR, pctx)) ||
2850             (!ext2fs_has_feature_dir_index(fs->super))) {
2851                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2852                 if (fix_problem(ctx, PR_1_HTREE_SET, pctx))
2853                         return 1;
2854         }
2855
2856         pctx->errcode = ext2fs_bmap2(fs, ino, inode, 0, 0, 0, 0, &blk);
2857
2858         if ((pctx->errcode) ||
2859             (blk == 0) ||
2860             (blk < fs->super->s_first_data_block) ||
2861             (blk >= ext2fs_blocks_count(fs->super))) {
2862                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2863                 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2864                         return 1;
2865                 else
2866                         return 0;
2867         }
2868
2869         retval = io_channel_read_blk64(fs->io, blk, 1, block_buf);
2870         if (retval) {
2871                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
2872                 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2873                         return 1;
2874         }
2875
2876         /* XXX should check that beginning matches a directory */
2877         root = (struct ext2_dx_root_info *) (block_buf + 24);
2878
2879         if ((root->reserved_zero || root->info_length < 8) &&
2880             fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2881                 return 1;
2882
2883         pctx->num = root->hash_version;
2884         if ((root->hash_version != EXT2_HASH_LEGACY) &&
2885             (root->hash_version != EXT2_HASH_HALF_MD4) &&
2886             (root->hash_version != EXT2_HASH_TEA) &&
2887             fix_problem(ctx, PR_1_HTREE_HASHV, pctx))
2888                 return 1;
2889
2890         if ((root->unused_flags & EXT2_HASH_FLAG_INCOMPAT) &&
2891             fix_problem(ctx, PR_1_HTREE_INCOMPAT, pctx))
2892                 return 1;
2893
2894         pctx->num = root->indirect_levels;
2895         if ((root->indirect_levels > ext2_dir_htree_level(fs)) &&
2896             fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2897                 return 1;
2898
2899         return 0;
2900 }
2901
2902 void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino,
2903                         struct ext2_inode *inode, int restart_flag,
2904                         const char *source)
2905 {
2906         inode->i_flags = 0;
2907         inode->i_links_count = 0;
2908         ext2fs_icount_store(ctx->inode_link_info, ino, 0);
2909         inode->i_dtime = ctx->now;
2910
2911         /*
2912          * If a special inode has such rotten block mappings that we
2913          * want to clear the whole inode, be sure to actually zap
2914          * the block maps because i_links_count isn't checked for
2915          * special inodes, and we'll end up right back here the next
2916          * time we run fsck.
2917          */
2918         if (ino < EXT2_FIRST_INODE(ctx->fs->super))
2919                 memset(inode->i_block, 0, sizeof(inode->i_block));
2920
2921         ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
2922         ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
2923         if (ctx->inode_reg_map)
2924                 ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
2925         if (ctx->inode_badness)
2926                 ext2fs_icount_store(ctx->inode_badness, ino, 0);
2927
2928         /*
2929          * If the inode was partially accounted for before processing
2930          * was aborted, we need to restart the pass 1 scan.
2931          */
2932         ctx->flags |= restart_flag;
2933
2934         if (ino == EXT2_BAD_INO)
2935                 memset(inode, 0, sizeof(struct ext2_inode));
2936
2937         e2fsck_write_inode(ctx, ino, inode, source);
2938 }
2939
2940 /*
2941  * Use the multiple-blocks reclamation code to fix alignment problems in
2942  * a bigalloc filesystem.  We want a logical cluster to map to *only* one
2943  * physical cluster, and we want the block offsets within that cluster to
2944  * line up.
2945  */
2946 static int has_unaligned_cluster_map(e2fsck_t ctx,
2947                                      blk64_t last_pblk, blk64_t last_lblk,
2948                                      blk64_t pblk, blk64_t lblk)
2949 {
2950         blk64_t cluster_mask;
2951
2952         if (!ctx->fs->cluster_ratio_bits)
2953                 return 0;
2954         cluster_mask = EXT2FS_CLUSTER_MASK(ctx->fs);
2955
2956         /*
2957          * If the block in the logical cluster doesn't align with the block in
2958          * the physical cluster...
2959          */
2960         if ((lblk & cluster_mask) != (pblk & cluster_mask))
2961                 return 1;
2962
2963         /*
2964          * If we cross a physical cluster boundary within a logical cluster...
2965          */
2966         if (last_pblk && (lblk & cluster_mask) != 0 &&
2967             EXT2FS_B2C(ctx->fs, lblk) == EXT2FS_B2C(ctx->fs, last_lblk) &&
2968             EXT2FS_B2C(ctx->fs, pblk) != EXT2FS_B2C(ctx->fs, last_pblk))
2969                 return 1;
2970
2971         return 0;
2972 }
2973
2974 static void scan_extent_node(e2fsck_t ctx, struct problem_context *pctx,
2975                              struct process_block_struct *pb,
2976                              blk64_t start_block, blk64_t end_block,
2977                              blk64_t eof_block,
2978                              ext2_extent_handle_t ehandle,
2979                              int try_repairs)
2980 {
2981         struct ext2fs_extent    extent;
2982         blk64_t                 blk, last_lblk;
2983         unsigned int            i, n;
2984         int                     is_dir, is_leaf;
2985         problem_t               problem;
2986         struct ext2_extent_info info;
2987         int                     failed_csum = 0;
2988
2989         if (pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID)
2990                 failed_csum = 1;
2991
2992         pctx->errcode = ext2fs_extent_get_info(ehandle, &info);
2993         if (pctx->errcode)
2994                 return;
2995         if (!(ctx->options & E2F_OPT_FIXES_ONLY) &&
2996             !pb->eti.force_rebuild) {
2997                 struct extent_tree_level *etl;
2998
2999                 etl = pb->eti.ext_info + info.curr_level;
3000                 etl->num_extents += info.num_entries;
3001                 etl->max_extents += info.max_entries;
3002                 /*
3003                  * Implementation wart: Splitting extent blocks when appending
3004                  * will leave the old block with one free entry.  Therefore
3005                  * unless the node is totally full, pretend that a non-root
3006                  * extent block can hold one fewer entry than it actually does,
3007                  * so that we don't repeatedly rebuild the extent tree.
3008                  */
3009                 if (info.curr_level && info.num_entries < info.max_entries)
3010                         etl->max_extents--;
3011         }
3012
3013         pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_FIRST_SIB,
3014                                           &extent);
3015         while ((pctx->errcode == 0 ||
3016                 pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID) &&
3017                info.num_entries-- > 0) {
3018                 is_leaf = extent.e_flags & EXT2_EXTENT_FLAGS_LEAF;
3019                 is_dir = LINUX_S_ISDIR(pctx->inode->i_mode);
3020                 last_lblk = extent.e_lblk + extent.e_len - 1;
3021
3022                 problem = 0;
3023                 pctx->blk = extent.e_pblk;
3024                 pctx->blk2 = extent.e_lblk;
3025                 pctx->num = extent.e_len;
3026                 pctx->blkcount = extent.e_lblk + extent.e_len;
3027
3028                 if (extent.e_pblk == 0 ||
3029                     extent.e_pblk < ctx->fs->super->s_first_data_block ||
3030                     extent.e_pblk >= ext2fs_blocks_count(ctx->fs->super))
3031                         problem = PR_1_EXTENT_BAD_START_BLK;
3032                 else if (extent.e_lblk < start_block)
3033                         problem = PR_1_OUT_OF_ORDER_EXTENTS;
3034                 else if ((end_block && last_lblk > end_block) &&
3035                          (!(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT &&
3036                                 last_lblk > eof_block)))
3037                         problem = PR_1_EXTENT_END_OUT_OF_BOUNDS;
3038                 else if (is_leaf && extent.e_len == 0)
3039                         problem = PR_1_EXTENT_LENGTH_ZERO;
3040                 else if (is_leaf &&
3041                          (extent.e_pblk + extent.e_len) >
3042                          ext2fs_blocks_count(ctx->fs->super))
3043                         problem = PR_1_EXTENT_ENDS_BEYOND;
3044                 else if (is_leaf && is_dir &&
3045                          ((extent.e_lblk + extent.e_len) >
3046                           (1U << (21 - ctx->fs->super->s_log_block_size))))
3047                         problem = PR_1_TOOBIG_DIR;
3048
3049                 if (is_leaf && problem == 0 && extent.e_len > 0) {
3050 #if 0
3051                         printf("extent_region(ino=%u, expect=%llu, "
3052                                "lblk=%llu, len=%u)\n",
3053                                pb->ino, pb->next_lblock,
3054                                extent.e_lblk, extent.e_len);
3055 #endif
3056                         if (extent.e_lblk < pb->next_lblock)
3057                                 problem = PR_1_EXTENT_COLLISION;
3058                         else if (extent.e_lblk + extent.e_len > pb->next_lblock)
3059                                 pb->next_lblock = extent.e_lblk + extent.e_len;
3060                 }
3061
3062                 /*
3063                  * Uninitialized blocks in a directory?  Clear the flag and
3064                  * we'll interpret the blocks later.
3065                  */
3066                 if (try_repairs && is_dir && problem == 0 &&
3067                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
3068                     fix_problem(ctx, PR_1_UNINIT_DBLOCK, pctx)) {
3069                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
3070                         pb->inode_modified = 1;
3071                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
3072                                                               &extent);
3073                         if (pctx->errcode)
3074                                 return;
3075                         failed_csum = 0;
3076                 }
3077
3078                 if (try_repairs && problem) {
3079                         /* To ensure that extent is in inode */
3080                         if (info.curr_level == 0)
3081                                 e2fsck_mark_inode_bad(ctx, pctx->ino,
3082                                                       BADNESS_HIGH);
3083 report_problem:
3084                         if (fix_problem(ctx, problem, pctx)) {
3085                                 if (ctx->invalid_bitmaps) {
3086                                         /*
3087                                          * If fsck knows the bitmaps are bad,
3088                                          * skip to the next extent and
3089                                          * try to clear this extent again
3090                                          * after fixing the bitmaps, by
3091                                          * restarting fsck.
3092                                          */
3093                                         pctx->errcode = ext2fs_extent_get(
3094                                                           ehandle,
3095                                                           EXT2_EXTENT_NEXT_SIB,
3096                                                           &extent);
3097                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3098                                         if (pctx->errcode ==
3099                                                     EXT2_ET_NO_CURRENT_NODE) {
3100                                                 pctx->errcode = 0;
3101                                                 break;
3102                                         }
3103                                         continue;
3104                                 }
3105                                 e2fsck_read_bitmaps(ctx);
3106                                 pb->inode_modified = 1;
3107                                 pctx->errcode =
3108                                         ext2fs_extent_delete(ehandle, 0);
3109                                 if (pctx->errcode) {
3110                                         pctx->str = "ext2fs_extent_delete";
3111                                         return;
3112                                 }
3113                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3114                                 if (pctx->errcode &&
3115                                     pctx->errcode != EXT2_ET_NO_CURRENT_NODE) {
3116                                         pctx->str = "ext2fs_extent_fix_parents";
3117                                         return;
3118                                 }
3119                                 pctx->errcode = ext2fs_extent_get(ehandle,
3120                                                                   EXT2_EXTENT_CURRENT,
3121                                                                   &extent);
3122                                 if (pctx->errcode == EXT2_ET_NO_CURRENT_NODE) {
3123                                         pctx->errcode = 0;
3124                                         break;
3125                                 }
3126                                 failed_csum = 0;
3127                                 continue;
3128                         }
3129                         goto next;
3130                 }
3131
3132                 if (!is_leaf) {
3133                         blk64_t lblk = extent.e_lblk;
3134                         int next_try_repairs = 1;
3135
3136                         blk = extent.e_pblk;
3137
3138                         /*
3139                          * If this lower extent block collides with critical
3140                          * metadata, don't try to repair the damage.  Pass 1b
3141                          * will reallocate the block; then we can try again.
3142                          */
3143                         if (pb->ino != EXT2_RESIZE_INO &&
3144                             extent.e_pblk < ctx->fs->super->s_blocks_count &&
3145                             ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3146                                                       extent.e_pblk)) {
3147                                 next_try_repairs = 0;
3148                                 pctx->blk = blk;
3149                                 fix_problem(ctx,
3150                                             PR_1_CRITICAL_METADATA_COLLISION,
3151                                             pctx);
3152                                 if ((ctx->options & E2F_OPT_NO) == 0)
3153                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3154                         }
3155                         pctx->errcode = ext2fs_extent_get(ehandle,
3156                                                   EXT2_EXTENT_DOWN, &extent);
3157                         if (pctx->errcode &&
3158                             pctx->errcode != EXT2_ET_EXTENT_CSUM_INVALID) {
3159                                 pctx->str = "EXT2_EXTENT_DOWN";
3160                                 problem = PR_1_EXTENT_HEADER_INVALID;
3161                                 if (!next_try_repairs)
3162                                         return;
3163                                 if (pctx->errcode == EXT2_ET_EXTENT_HEADER_BAD)
3164                                         goto report_problem;
3165                                 return;
3166                         }
3167                         /* The next extent should match this index's logical start */
3168                         if (extent.e_lblk != lblk) {
3169                                 struct ext2_extent_info e_info;
3170
3171                                 ext2fs_extent_get_info(ehandle, &e_info);
3172                                 pctx->blk = lblk;
3173                                 pctx->blk2 = extent.e_lblk;
3174                                 pctx->num = e_info.curr_level - 1;
3175                                 problem = PR_1_EXTENT_INDEX_START_INVALID;
3176                                 if (fix_problem(ctx, problem, pctx)) {
3177                                         pb->inode_modified = 1;
3178                                         pctx->errcode =
3179                                                 ext2fs_extent_fix_parents(ehandle);
3180                                         if (pctx->errcode) {
3181                                                 pctx->str = "ext2fs_extent_fix_parents";
3182                                                 return;
3183                                         }
3184                                 }
3185                         }
3186                         scan_extent_node(ctx, pctx, pb, extent.e_lblk,
3187                                          last_lblk, eof_block, ehandle,
3188                                          next_try_repairs);
3189                         if (pctx->errcode)
3190                                 return;
3191                         pctx->errcode = ext2fs_extent_get(ehandle,
3192                                                   EXT2_EXTENT_UP, &extent);
3193                         if (pctx->errcode) {
3194                                 pctx->str = "EXT2_EXTENT_UP";
3195                                 return;
3196                         }
3197                         mark_block_used(ctx, blk);
3198                         pb->num_blocks++;
3199                         goto next;
3200                 }
3201
3202                 if ((pb->previous_block != 0) &&
3203                     (pb->previous_block+1 != extent.e_pblk)) {
3204                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3205                                 char type = '?';
3206
3207                                 if (pb->is_dir)
3208                                         type = 'd';
3209                                 else if (pb->is_reg)
3210                                         type = 'f';
3211
3212                                 printf(("%6lu(%c): expecting %6lu "
3213                                         "actual extent "
3214                                         "phys %6lu log %lu len %lu\n"),
3215                                        (unsigned long) pctx->ino, type,
3216                                        (unsigned long) pb->previous_block+1,
3217                                        (unsigned long) extent.e_pblk,
3218                                        (unsigned long) extent.e_lblk,
3219                                        (unsigned long) extent.e_len);
3220                         }
3221                         pb->fragmented = 1;
3222                 }
3223                 /*
3224                  * If we notice a gap in the logical block mappings of an
3225                  * extent-mapped directory, offer to close the hole by
3226                  * moving the logical block down, otherwise we'll go mad in
3227                  * pass 3 allocating empty directory blocks to fill the hole.
3228                  */
3229                 if (try_repairs && is_dir &&
3230                     pb->last_block + 1 < extent.e_lblk) {
3231                         blk64_t new_lblk;
3232
3233                         new_lblk = pb->last_block + 1;
3234                         if (EXT2FS_CLUSTER_RATIO(ctx->fs) > 1)
3235                                 new_lblk = ((new_lblk +
3236                                              EXT2FS_CLUSTER_RATIO(ctx->fs) - 1) &
3237                                             ~EXT2FS_CLUSTER_MASK(ctx->fs)) |
3238                                            (extent.e_pblk &
3239                                             EXT2FS_CLUSTER_MASK(ctx->fs));
3240                         pctx->blk = extent.e_lblk;
3241                         pctx->blk2 = new_lblk;
3242                         if (fix_problem(ctx, PR_1_COLLAPSE_DBLOCK, pctx)) {
3243                                 extent.e_lblk = new_lblk;
3244                                 pb->inode_modified = 1;
3245                                 pctx->errcode = ext2fs_extent_replace(ehandle,
3246                                                                 0, &extent);
3247                                 if (pctx->errcode) {
3248                                         pctx->errcode = 0;
3249                                         goto alloc_later;
3250                                 }
3251                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3252                                 if (pctx->errcode)
3253                                         goto failed_add_dir_block;
3254                                 pctx->errcode = ext2fs_extent_goto(ehandle,
3255                                                                 extent.e_lblk);
3256                                 if (pctx->errcode)
3257                                         goto failed_add_dir_block;
3258                                 last_lblk = extent.e_lblk + extent.e_len - 1;
3259                                 failed_csum = 0;
3260                         }
3261                 }
3262 alloc_later:
3263                 if (is_dir) {
3264                         while (++pb->last_db_block <
3265                                (e2_blkcnt_t) extent.e_lblk) {
3266                                 pctx->errcode = ext2fs_add_dir_block2(
3267                                                         ctx->fs->dblist,
3268                                                         pb->ino, 0,
3269                                                         pb->last_db_block);
3270                                 if (pctx->errcode) {
3271                                         pctx->blk = 0;
3272                                         pctx->num = pb->last_db_block;
3273                                         goto failed_add_dir_block;
3274                                 }
3275                         }
3276
3277                         for (i = 0; i < extent.e_len; i++) {
3278                                 pctx->errcode = ext2fs_add_dir_block2(
3279                                                         ctx->fs->dblist,
3280                                                         pctx->ino,
3281                                                         extent.e_pblk + i,
3282                                                         extent.e_lblk + i);
3283                                 if (pctx->errcode) {
3284                                         pctx->blk = extent.e_pblk + i;
3285                                         pctx->num = extent.e_lblk + i;
3286                                 failed_add_dir_block:
3287                                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3288                                         /* Should never get here */
3289                                         ctx->flags |= E2F_FLAG_ABORT;
3290                                         return;
3291                                 }
3292                         }
3293                         if (extent.e_len > 0)
3294                                 pb->last_db_block = extent.e_lblk + extent.e_len - 1;
3295                 }
3296                 if (has_unaligned_cluster_map(ctx, pb->previous_block,
3297                                               pb->last_block,
3298                                               extent.e_pblk,
3299                                               extent.e_lblk)) {
3300                         for (i = 0; i < extent.e_len; i++) {
3301                                 pctx->blk = extent.e_lblk + i;
3302                                 pctx->blk2 = extent.e_pblk + i;
3303                                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3304                                 mark_block_used(ctx, extent.e_pblk + i);
3305                                 mark_block_used(ctx, extent.e_pblk + i);
3306                         }
3307                 }
3308
3309                 /*
3310                  * Check whether first cluster got marked in previous iteration.
3311                  */
3312                 if (ctx->fs->cluster_ratio_bits &&
3313                     pb->previous_block &&
3314                     (EXT2FS_B2C(ctx->fs, extent.e_pblk) ==
3315                      EXT2FS_B2C(ctx->fs, pb->previous_block)))
3316                         /* Set blk to the beginning of next cluster. */
3317                         blk = EXT2FS_C2B(
3318                                 ctx->fs,
3319                                 EXT2FS_B2C(ctx->fs, extent.e_pblk) + 1);
3320                 else
3321                         /* Set blk to the beginning of current cluster. */
3322                         blk = EXT2FS_C2B(ctx->fs,
3323                                          EXT2FS_B2C(ctx->fs, extent.e_pblk));
3324
3325                 if (blk < extent.e_pblk + extent.e_len) {
3326                         mark_blocks_used(ctx, blk,
3327                                          extent.e_pblk + extent.e_len - blk);
3328                         n = DIV_ROUND_UP(extent.e_pblk + extent.e_len - blk,
3329                                          EXT2FS_CLUSTER_RATIO(ctx->fs));
3330                         pb->num_blocks += n;
3331                 }
3332                 pb->last_block = extent.e_lblk + extent.e_len - 1;
3333                 pb->previous_block = extent.e_pblk + extent.e_len - 1;
3334                 start_block = pb->last_block = last_lblk;
3335                 if (is_leaf && !is_dir &&
3336                     !(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT))
3337                         pb->last_init_lblock = last_lblk;
3338         next:
3339                 pctx->errcode = ext2fs_extent_get(ehandle,
3340                                                   EXT2_EXTENT_NEXT_SIB,
3341                                                   &extent);
3342         }
3343
3344         /* Failed csum but passes checks?  Ask to fix checksum. */
3345         if (failed_csum &&
3346             fix_problem(ctx, PR_1_EXTENT_ONLY_CSUM_INVALID, pctx)) {
3347                 pb->inode_modified = 1;
3348                 pctx->errcode = ext2fs_extent_replace(ehandle, 0, &extent);
3349                 if (pctx->errcode)
3350                         return;
3351         }
3352
3353         if (pctx->errcode == EXT2_ET_EXTENT_NO_NEXT)
3354                 pctx->errcode = 0;
3355 }
3356
3357 static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx,
3358                                  struct process_block_struct *pb)
3359 {
3360         struct ext2_extent_info info;
3361         struct ext2_inode       *inode = pctx->inode;
3362         ext2_extent_handle_t    ehandle;
3363         ext2_filsys             fs = ctx->fs;
3364         ext2_ino_t              ino = pctx->ino;
3365         errcode_t               retval;
3366         blk64_t                 eof_lblk;
3367         struct ext3_extent_header       *eh;
3368
3369         /* Check for a proper extent header... */
3370         eh = (struct ext3_extent_header *) &inode->i_block[0];
3371         retval = ext2fs_extent_header_verify(eh, sizeof(inode->i_block));
3372         if (retval) {
3373                 if (fix_problem(ctx, PR_1_MISSING_EXTENT_HEADER, pctx))
3374                         e2fsck_clear_inode(ctx, ino, inode, 0,
3375                                            "check_blocks_extents");
3376                 pctx->errcode = 0;
3377                 return;
3378         }
3379
3380         /* ...since this function doesn't fail if i_block is zeroed. */
3381         pctx->errcode = ext2fs_extent_open2(fs, ino, inode, &ehandle);
3382         if (pctx->errcode) {
3383                 if (fix_problem(ctx, PR_1_READ_EXTENT, pctx))
3384                         e2fsck_clear_inode(ctx, ino, inode, 0,
3385                                            "check_blocks_extents");
3386                 pctx->errcode = 0;
3387                 return;
3388         }
3389
3390         retval = ext2fs_extent_get_info(ehandle, &info);
3391         if (retval == 0) {
3392                 int max_depth = info.max_depth;
3393
3394                 if (max_depth >= MAX_EXTENT_DEPTH_COUNT)
3395                         max_depth = MAX_EXTENT_DEPTH_COUNT-1;
3396                 ctx->extent_depth_count[max_depth]++;
3397         }
3398
3399         /* Check maximum extent depth */
3400         pctx->blk = info.max_depth;
3401         pctx->blk2 = ext2fs_max_extent_depth(ehandle);
3402         if (pctx->blk2 < pctx->blk &&
3403             fix_problem(ctx, PR_1_EXTENT_BAD_MAX_DEPTH, pctx))
3404                 pb->eti.force_rebuild = 1;
3405
3406         /* Can we collect extent tree level stats? */
3407         pctx->blk = MAX_EXTENT_DEPTH_COUNT;
3408         if (pctx->blk2 > pctx->blk)
3409                 fix_problem(ctx, PR_1E_MAX_EXTENT_TREE_DEPTH, pctx);
3410         memset(pb->eti.ext_info, 0, sizeof(pb->eti.ext_info));
3411         pb->eti.ino = pb->ino;
3412
3413         pb->next_lblock = 0;
3414
3415         eof_lblk = ((EXT2_I_SIZE(inode) + fs->blocksize - 1) >>
3416                 EXT2_BLOCK_SIZE_BITS(fs->super)) - 1;
3417         scan_extent_node(ctx, pctx, pb, 0, 0, eof_lblk, ehandle, 1);
3418         if (pctx->errcode &&
3419             fix_problem(ctx, PR_1_EXTENT_ITERATE_FAILURE, pctx)) {
3420                 pb->num_blocks = 0;
3421                 inode->i_blocks = 0;
3422                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3423                                    "check_blocks_extents");
3424                 pctx->errcode = 0;
3425         }
3426         ext2fs_extent_free(ehandle);
3427
3428         /* Rebuild unless it's a dir and we're rehashing it */
3429         if (LINUX_S_ISDIR(inode->i_mode) &&
3430             e2fsck_dir_will_be_rehashed(ctx, ino))
3431                 return;
3432
3433         if (ctx->options & E2F_OPT_CONVERT_BMAP)
3434                 e2fsck_rebuild_extents_later(ctx, ino);
3435         else
3436                 e2fsck_should_rebuild_extents(ctx, pctx, &pb->eti, &info);
3437 }
3438
3439 /*
3440  * In fact we don't need to check blocks for an inode with inline data
3441  * because this inode doesn't have any blocks.  In this function all
3442  * we need to do is add this inode into dblist when it is a directory.
3443  */
3444 static void check_blocks_inline_data(e2fsck_t ctx, struct problem_context *pctx,
3445                                      struct process_block_struct *pb)
3446 {
3447         int     flags;
3448         size_t  inline_data_size = 0;
3449
3450         if (!pb->is_dir) {
3451                 pctx->errcode = 0;
3452                 return;
3453         }
3454
3455         /* Process the dirents in i_block[] as the "first" block. */
3456         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 0);
3457         if (pctx->errcode)
3458                 goto err;
3459
3460         /* Process the dirents in the EA as a "second" block. */
3461         flags = ctx->fs->flags;
3462         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3463         pctx->errcode = ext2fs_inline_data_size(ctx->fs, pb->ino,
3464                                                 &inline_data_size);
3465         ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3466                          (ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3467         if (pctx->errcode) {
3468                 pctx->errcode = 0;
3469                 return;
3470         }
3471
3472         if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE)
3473                 return;
3474
3475         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 1);
3476         if (pctx->errcode)
3477                 goto err;
3478
3479         return;
3480 err:
3481         pctx->blk = 0;
3482         pctx->num = 0;
3483         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3484         ctx->flags |= E2F_FLAG_ABORT;
3485 }
3486
3487 /*
3488  * This subroutine is called on each inode to account for all of the
3489  * blocks used by that inode.
3490  */
3491 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
3492                          char *block_buf, const struct ea_quota *ea_ibody_quota)
3493 {
3494         ext2_filsys fs = ctx->fs;
3495         struct process_block_struct pb;
3496         ext2_ino_t      ino = pctx->ino;
3497         struct ext2_inode *inode = pctx->inode;
3498         unsigned        bad_size = 0;
3499         int             dirty_inode = 0;
3500         int             extent_fs;
3501         int             inlinedata_fs;
3502         __u64           size;
3503         struct ea_quota ea_block_quota;
3504
3505         pb.ino = ino;
3506         pb.num_blocks = EXT2FS_B2C(ctx->fs,
3507                                    ea_ibody_quota ? ea_ibody_quota->blocks : 0);
3508         pb.last_block = ~0;
3509         pb.last_init_lblock = -1;
3510         pb.last_db_block = -1;
3511         pb.num_illegal_blocks = 0;
3512         pb.suppress = 0; pb.clear = 0;
3513         pb.fragmented = 0;
3514         pb.compressed = 0;
3515         pb.previous_block = 0;
3516         pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
3517         pb.is_reg = LINUX_S_ISREG(inode->i_mode);
3518         pb.max_blocks = 1U << (31 - fs->super->s_log_block_size);
3519         pb.inode = inode;
3520         pb.pctx = pctx;
3521         pb.ctx = ctx;
3522         pb.inode_modified = 0;
3523         pb.eti.force_rebuild = 0;
3524         pctx->ino = ino;
3525         pctx->errcode = 0;
3526
3527         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
3528         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
3529
3530         if (check_ext_attr(ctx, pctx, block_buf, &ea_block_quota)) {
3531                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3532                         goto out;
3533                 pb.num_blocks += EXT2FS_B2C(ctx->fs, ea_block_quota.blocks);
3534         }
3535
3536         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL))
3537                 check_blocks_inline_data(ctx, pctx, &pb);
3538         else if (ext2fs_inode_has_valid_blocks2(fs, inode)) {
3539                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL))
3540                         check_blocks_extents(ctx, pctx, &pb);
3541                 else {
3542                         int flags;
3543                         /*
3544                          * If we've modified the inode, write it out before
3545                          * iterate() tries to use it.
3546                          */
3547                         if (dirty_inode) {
3548                                 e2fsck_write_inode(ctx, ino, inode,
3549                                                    "check_blocks");
3550                                 dirty_inode = 0;
3551                         }
3552                         flags = fs->flags;
3553                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3554                         pctx->errcode = ext2fs_block_iterate3(fs, ino,
3555                                                 pb.is_dir ? BLOCK_FLAG_HOLE : 0,
3556                                                 block_buf, process_block, &pb);
3557                         /*
3558                          * We do not have uninitialized extents in non extent
3559                          * files.
3560                          */
3561                         pb.last_init_lblock = pb.last_block;
3562                         /*
3563                          * If iterate() changed a block mapping, we have to
3564                          * re-read the inode.  If we decide to clear the
3565                          * inode after clearing some stuff, we'll re-write the
3566                          * bad mappings into the inode!
3567                          */
3568                         if (pb.inode_modified)
3569                                 e2fsck_read_inode(ctx, ino, inode,
3570                                                   "check_blocks");
3571                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3572                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3573
3574                         if (ctx->options & E2F_OPT_CONVERT_BMAP) {
3575 #ifdef DEBUG
3576                                 printf("bmap rebuild ino=%d\n", ino);
3577 #endif
3578                                 if (!LINUX_S_ISDIR(inode->i_mode) ||
3579                                     !e2fsck_dir_will_be_rehashed(ctx, ino))
3580                                         e2fsck_rebuild_extents_later(ctx, ino);
3581                         }
3582                 }
3583         }
3584         end_problem_latch(ctx, PR_LATCH_BLOCK);
3585         end_problem_latch(ctx, PR_LATCH_TOOBIG);
3586         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3587                 goto out;
3588         if (pctx->errcode)
3589                 fix_problem(ctx, PR_1_BLOCK_ITERATE, pctx);
3590
3591         if (pb.fragmented && pb.num_blocks < fs->super->s_blocks_per_group) {
3592                 if (LINUX_S_ISDIR(inode->i_mode))
3593                         ctx->fs_fragmented_dir++;
3594                 else
3595                         ctx->fs_fragmented++;
3596         }
3597
3598         if (pb.clear) {
3599                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3600                                    "check_blocks");
3601                 return;
3602         }
3603
3604         if (inode->i_flags & EXT2_INDEX_FL) {
3605                 if (handle_htree(ctx, pctx, ino, inode, block_buf)) {
3606                         inode->i_flags &= ~EXT2_INDEX_FL;
3607                         dirty_inode++;
3608                 } else {
3609                         e2fsck_add_dx_dir(ctx, ino, pb.last_block+1);
3610                 }
3611         }
3612
3613         if (!pb.num_blocks && pb.is_dir &&
3614             !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
3615                 /*
3616                  * The mode might be in-correct. Increasing the badness by
3617                  * small amount won't hurt much.
3618                  */
3619                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
3620                 if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) {
3621                         e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks");
3622                         ctx->fs_directory_count--;
3623                         return;
3624                 }
3625         }
3626
3627         if (ino != quota_type2inum(PRJQUOTA, fs->super) &&
3628             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super)) &&
3629             !(inode->i_flags & EXT4_EA_INODE_FL)) {
3630                 quota_data_add(ctx->qctx, (struct ext2_inode_large *) inode,
3631                                ino,
3632                                pb.num_blocks * EXT2_CLUSTER_SIZE(fs->super));
3633                 quota_data_inodes(ctx->qctx, (struct ext2_inode_large *) inode,
3634                                   ino, (ea_ibody_quota ?
3635                                         ea_ibody_quota->inodes : 0) +
3636                                                 ea_block_quota.inodes + 1);
3637         }
3638
3639         if (!ext2fs_has_feature_huge_file(fs->super) ||
3640             !(inode->i_flags & EXT4_HUGE_FILE_FL))
3641                 pb.num_blocks *= (fs->blocksize / 512);
3642         pb.num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
3643 #if 0
3644         printf("inode %u, i_size = %u, last_block = %llu, i_blocks=%llu, num_blocks = %llu\n",
3645                ino, inode->i_size, pb.last_block, ext2fs_inode_i_blocks(fs, inode),
3646                pb.num_blocks);
3647 #endif
3648         if (pb.is_dir) {
3649                 unsigned nblock = inode->i_size >> EXT2_BLOCK_SIZE_BITS(fs->super);
3650                 if (inode->i_flags & EXT4_INLINE_DATA_FL) {
3651                         int flags;
3652                         size_t sz = 0;
3653                         errcode_t err;
3654
3655                         flags = ctx->fs->flags;
3656                         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3657                         err = ext2fs_inline_data_size(ctx->fs, pctx->ino,
3658                                                       &sz);
3659                         ctx->fs->flags = (flags &
3660                                           EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3661                                          (ctx->fs->flags &
3662                                           ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3663                         if (err || sz != inode->i_size) {
3664                                 bad_size = 7;
3665                                 pctx->num = sz;
3666                         }
3667                 } else if (inode->i_size & (fs->blocksize - 1))
3668                         bad_size = 5;
3669                 else if (nblock > (pb.last_block + 1))
3670                         bad_size = 1;
3671                 else if (nblock < (pb.last_block + 1)) {
3672                         if (((pb.last_block + 1) - nblock) >
3673                             fs->super->s_prealloc_dir_blocks)
3674                                 bad_size = 2;
3675                 }
3676         } else {
3677                 e2_blkcnt_t blkpg = ctx->blocks_per_page;
3678
3679                 size = EXT2_I_SIZE(inode);
3680                 if ((pb.last_init_lblock >= 0) &&
3681                     /* Do not allow initialized allocated blocks past i_size*/
3682                     (size < (__u64)pb.last_init_lblock * fs->blocksize))
3683                         bad_size = 3;
3684                 else if (!(extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3685                          size > ext2_max_sizes[fs->super->s_log_block_size])
3686                         /* too big for a direct/indirect-mapped file */
3687                         bad_size = 4;
3688                 else if ((extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3689                          size >
3690                          ((1ULL << (32 + EXT2_BLOCK_SIZE_BITS(fs->super))) - 1))
3691                         /* too big for an extent-based file - 32bit ee_block */
3692                         bad_size = 6;
3693         }
3694         /* i_size for symlinks is checked elsewhere */
3695         if (bad_size && !LINUX_S_ISLNK(inode->i_mode)) {
3696                 /* Did inline_data set pctx->num earlier? */
3697                 if (bad_size != 7)
3698                         pctx->num = (pb.last_block + 1) * fs->blocksize;
3699                 pctx->group = bad_size;
3700                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
3701                 if (fix_problem(ctx, PR_1_BAD_I_SIZE, pctx)) {
3702                         if (LINUX_S_ISDIR(inode->i_mode))
3703                                 pctx->num &= 0xFFFFFFFFULL;
3704                         ext2fs_inode_size_set(fs, inode, pctx->num);
3705                         if (EXT2_I_SIZE(inode) == 0 &&
3706                             (inode->i_flags & EXT4_INLINE_DATA_FL)) {
3707                                 memset(inode->i_block, 0,
3708                                        sizeof(inode->i_block));
3709                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
3710                         }
3711                         dirty_inode++;
3712                 }
3713                 pctx->num = 0;
3714         }
3715         if (LINUX_S_ISREG(inode->i_mode) &&
3716             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
3717                 ctx->large_files++;
3718         if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
3719             ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) ||
3720              (ext2fs_has_feature_huge_file(fs->super) &&
3721               (inode->i_flags & EXT4_HUGE_FILE_FL) &&
3722               (inode->osd2.linux2.l_i_blocks_hi != 0)))) {
3723                 pctx->num = pb.num_blocks;
3724                 e2fsck_mark_inode_bad(ctx, ino, BADNESS_NORMAL);
3725                 if (fix_problem(ctx, PR_1_BAD_I_BLOCKS, pctx)) {
3726                         inode->i_blocks = pb.num_blocks;
3727                         inode->osd2.linux2.l_i_blocks_hi = pb.num_blocks >> 32;
3728                         dirty_inode++;
3729                 }
3730                 pctx->num = 0;
3731         }
3732
3733         /*
3734          * The kernel gets mad if we ask it to allocate bigalloc clusters to
3735          * a block mapped file, so rebuild it as an extent file.  We can skip
3736          * symlinks because they're never rewritten.
3737          */
3738         if (ext2fs_has_feature_bigalloc(fs->super) &&
3739             (LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode)) &&
3740             ext2fs_inode_data_blocks2(fs, inode) > 0 &&
3741             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INO(fs->super)) &&
3742             !(inode->i_flags & (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)) &&
3743             fix_problem(ctx, PR_1_NO_BIGALLOC_BLOCKMAP_FILES, pctx)) {
3744                 pctx->errcode = e2fsck_rebuild_extents_later(ctx, ino);
3745                 if (pctx->errcode)
3746                         goto out;
3747         }
3748
3749         if (ctx->dirs_to_hash && pb.is_dir &&
3750             !(ctx->lost_and_found && ctx->lost_and_found == ino) &&
3751             !(inode->i_flags & EXT2_INDEX_FL) &&
3752             ((inode->i_size / fs->blocksize) >= 3))
3753                 e2fsck_rehash_dir_later(ctx, ino);
3754
3755 out:
3756         if (dirty_inode)
3757                 e2fsck_write_inode(ctx, ino, inode, "check_blocks");
3758 }
3759
3760 #if 0
3761 /*
3762  * Helper function called by process block when an illegal block is
3763  * found.  It returns a description about why the block is illegal
3764  */
3765 static char *describe_illegal_block(ext2_filsys fs, blk64_t block)
3766 {
3767         blk64_t super;
3768         int     i;
3769         static char     problem[80];
3770
3771         super = fs->super->s_first_data_block;
3772         strcpy(problem, "PROGRAMMING ERROR: Unknown reason for illegal block");
3773         if (block < super) {
3774                 sprintf(problem, "< FIRSTBLOCK (%u)", super);
3775                 return(problem);
3776         } else if (block >= ext2fs_blocks_count(fs->super)) {
3777                 sprintf(problem, "> BLOCKS (%u)", ext2fs_blocks_count(fs->super));
3778                 return(problem);
3779         }
3780         for (i = 0; i < fs->group_desc_count; i++) {
3781                 if (block == super) {
3782                         sprintf(problem, "is the superblock in group %d", i);
3783                         break;
3784                 }
3785                 if (block > super &&
3786                     block <= (super + fs->desc_blocks)) {
3787                         sprintf(problem, "is in the group descriptors "
3788                                 "of group %d", i);
3789                         break;
3790                 }
3791                 if (block == ext2fs_block_bitmap_loc(fs, i)) {
3792                         sprintf(problem, "is the block bitmap of group %d", i);
3793                         break;
3794                 }
3795                 if (block == ext2fs_inode_bitmap_loc(fs, i)) {
3796                         sprintf(problem, "is the inode bitmap of group %d", i);
3797                         break;
3798                 }
3799                 if (block >= ext2fs_inode_table_loc(fs, i) &&
3800                     (block < ext2fs_inode_table_loc(fs, i)
3801                      + fs->inode_blocks_per_group)) {
3802                         sprintf(problem, "is in the inode table of group %d",
3803                                 i);
3804                         break;
3805                 }
3806                 super += fs->super->s_blocks_per_group;
3807         }
3808         return(problem);
3809 }
3810 #endif
3811
3812 /*
3813  * This is a helper function for check_blocks().
3814  */
3815 static int process_block(ext2_filsys fs,
3816                   blk64_t       *block_nr,
3817                   e2_blkcnt_t blockcnt,
3818                   blk64_t ref_block EXT2FS_ATTR((unused)),
3819                   int ref_offset EXT2FS_ATTR((unused)),
3820                   void *priv_data)
3821 {
3822         struct process_block_struct *p;
3823         struct problem_context *pctx;
3824         blk64_t blk = *block_nr;
3825         int     ret_code = 0;
3826         problem_t       problem = 0;
3827         e2fsck_t        ctx;
3828
3829         p = (struct process_block_struct *) priv_data;
3830         pctx = p->pctx;
3831         ctx = p->ctx;
3832
3833         /*
3834          * For a directory, add logical block zero for processing even if it's
3835          * not mapped or we'll be perennially stuck with broken "." and ".."
3836          * entries.
3837          */
3838         if (p->is_dir && blockcnt == 0 && blk == 0) {
3839                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino, 0, 0);
3840                 if (pctx->errcode) {
3841                         pctx->blk = blk;
3842                         pctx->num = blockcnt;
3843                         goto failed_add_dir_block;
3844                 }
3845                 p->last_db_block++;
3846         }
3847
3848         if (blk == 0)
3849                 return 0;
3850
3851 #if 0
3852         printf("Process_block, inode %lu, block %u, #%d\n", p->ino, blk,
3853                blockcnt);
3854 #endif
3855
3856         /*
3857          * Simplistic fragmentation check.  We merely require that the
3858          * file be contiguous.  (Which can never be true for really
3859          * big files that are greater than a block group.)
3860          */
3861         if (p->previous_block && p->ino != EXT2_RESIZE_INO) {
3862                 if (p->previous_block+1 != blk) {
3863                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3864                                 char type = '?';
3865
3866                                 if (p->is_dir)
3867                                         type = 'd';
3868                                 else if (p->is_reg)
3869                                         type = 'f';
3870
3871                                 printf(_("%6lu(%c): expecting %6lu "
3872                                          "got phys %6lu (blkcnt %lld)\n"),
3873                                        (unsigned long) pctx->ino, type,
3874                                        (unsigned long) p->previous_block+1,
3875                                        (unsigned long) blk,
3876                                        blockcnt);
3877                         }
3878                         p->fragmented = 1;
3879                 }
3880         }
3881
3882         if (p->is_dir && blockcnt > (1 << (21 - fs->super->s_log_block_size)))
3883                 problem = PR_1_TOOBIG_DIR;
3884         if (p->is_reg && p->num_blocks+1 >= p->max_blocks)
3885                 problem = PR_1_TOOBIG_REG;
3886         if (!p->is_dir && !p->is_reg && blockcnt > 0)
3887                 problem = PR_1_TOOBIG_SYMLINK;
3888
3889         if (blk < fs->super->s_first_data_block ||
3890             blk >= ext2fs_blocks_count(fs->super)) {
3891                 problem = PR_1_ILLEGAL_BLOCK_NUM;
3892                 e2fsck_mark_inode_bad(ctx, pctx->ino, BADNESS_NORMAL);
3893         }
3894
3895         /*
3896          * If this IND/DIND/TIND block is squatting atop some critical metadata
3897          * (group descriptors, superblock, bitmap, inode table), any write to
3898          * "fix" mapping problems will destroy the metadata.  We'll let pass 1b
3899          * fix that and restart fsck.
3900          */
3901         if (blockcnt < 0 &&
3902             p->ino != EXT2_RESIZE_INO &&
3903             blk < ctx->fs->super->s_blocks_count &&
3904             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk)) {
3905                 pctx->blk = blk;
3906                 fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx);
3907                 if ((ctx->options & E2F_OPT_NO) == 0)
3908                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3909         }
3910
3911         if (problem) {
3912                 p->num_illegal_blocks++;
3913                 /*
3914                  * A bit of subterfuge here -- we're trying to fix a block
3915                  * mapping, but the IND/DIND/TIND block could have collided
3916                  * with some critical metadata.  So, fix the in-core mapping so
3917                  * iterate won't go insane, but return 0 instead of
3918                  * BLOCK_CHANGED so that it won't write the remapping out to
3919                  * our multiply linked block.
3920                  *
3921                  * Even if we previously determined that an *IND block
3922                  * conflicts with critical metadata, we must still try to
3923                  * iterate the *IND block as if it is an *IND block to find and
3924                  * mark the blocks it points to.  Better to be overly cautious
3925                  * with the used_blocks map so that we don't move the *IND
3926                  * block to a block that's really in use!
3927                  */
3928                 if (p->ino != EXT2_RESIZE_INO &&
3929                     ref_block != 0 &&
3930                     ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3931                                               ref_block)) {
3932                         *block_nr = 0;
3933                         return 0;
3934                 }
3935                 if (!p->suppress && (p->num_illegal_blocks % 12) == 0) {
3936                         if (fix_problem(ctx, PR_1_TOO_MANY_BAD_BLOCKS, pctx)) {
3937                                 p->clear = 1;
3938                                 return BLOCK_ABORT;
3939                         }
3940                         if (fix_problem(ctx, PR_1_SUPPRESS_MESSAGES, pctx)) {
3941                                 p->suppress = 1;
3942                                 set_latch_flags(PR_LATCH_BLOCK,
3943                                                 PRL_SUPPRESS, 0);
3944                         }
3945                 }
3946                 pctx->blk = blk;
3947                 pctx->blkcount = blockcnt;
3948                 if (fix_problem(ctx, problem, pctx)) {
3949                         blk = *block_nr = 0;
3950                         ret_code = BLOCK_CHANGED;
3951                         p->inode_modified = 1;
3952                         /*
3953                          * If the directory block is too big and is beyond the
3954                          * end of the FS, don't bother trying to add it for
3955                          * processing -- the kernel would never have created a
3956                          * directory this large, and we risk an ENOMEM abort.
3957                          * In any case, the toobig handler for extent-based
3958                          * directories also doesn't feed toobig blocks to
3959                          * pass 2.
3960                          */
3961                         if (problem == PR_1_TOOBIG_DIR)
3962                                 return ret_code;
3963                         goto mark_dir;
3964                 } else
3965                         return 0;
3966         }
3967
3968         if (p->ino == EXT2_RESIZE_INO) {
3969                 /*
3970                  * The resize inode has already be sanity checked
3971                  * during pass #0 (the superblock checks).  All we
3972                  * have to do is mark the double indirect block as
3973                  * being in use; all of the other blocks are handled
3974                  * by mark_table_blocks()).
3975                  */
3976                 if (blockcnt == BLOCK_COUNT_DIND)
3977                         mark_block_used(ctx, blk);
3978                 p->num_blocks++;
3979         } else if (!(ctx->fs->cluster_ratio_bits &&
3980                      p->previous_block &&
3981                      (EXT2FS_B2C(ctx->fs, blk) ==
3982                       EXT2FS_B2C(ctx->fs, p->previous_block)) &&
3983                      (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
3984                      ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
3985                 mark_block_used(ctx, blk);
3986                 p->num_blocks++;
3987         } else if (has_unaligned_cluster_map(ctx, p->previous_block,
3988                                              p->last_block, blk, blockcnt)) {
3989                 pctx->blk = blockcnt;
3990                 pctx->blk2 = blk;
3991                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3992                 mark_block_used(ctx, blk);
3993                 mark_block_used(ctx, blk);
3994         }
3995         if (blockcnt >= 0)
3996                 p->last_block = blockcnt;
3997         p->previous_block = blk;
3998 mark_dir:
3999         if (p->is_dir && (blockcnt >= 0)) {
4000                 while (++p->last_db_block < blockcnt) {
4001                         pctx->errcode = ext2fs_add_dir_block2(fs->dblist,
4002                                                               p->ino, 0,
4003                                                               p->last_db_block);
4004                         if (pctx->errcode) {
4005                                 pctx->blk = 0;
4006                                 pctx->num = p->last_db_block;
4007                                 goto failed_add_dir_block;
4008                         }
4009                 }
4010                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino,
4011                                                       blk, blockcnt);
4012                 if (pctx->errcode) {
4013                         pctx->blk = blk;
4014                         pctx->num = blockcnt;
4015                 failed_add_dir_block:
4016                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
4017                         /* Should never get here */
4018                         ctx->flags |= E2F_FLAG_ABORT;
4019                         return BLOCK_ABORT;
4020                 }
4021         }
4022         return ret_code;
4023 }
4024
4025 static int process_bad_block(ext2_filsys fs,
4026                       blk64_t *block_nr,
4027                       e2_blkcnt_t blockcnt,
4028                       blk64_t ref_block EXT2FS_ATTR((unused)),
4029                       int ref_offset EXT2FS_ATTR((unused)),
4030                       void *priv_data)
4031 {
4032         struct process_block_struct *p;
4033         blk64_t         blk = *block_nr;
4034         blk64_t         first_block;
4035         dgrp_t          i;
4036         struct problem_context *pctx;
4037         e2fsck_t        ctx;
4038
4039         if (!blk)
4040                 return 0;
4041
4042         p = (struct process_block_struct *) priv_data;
4043         ctx = p->ctx;
4044         pctx = p->pctx;
4045
4046         pctx->ino = EXT2_BAD_INO;
4047         pctx->blk = blk;
4048         pctx->blkcount = blockcnt;
4049
4050         if ((blk < fs->super->s_first_data_block) ||
4051             (blk >= ext2fs_blocks_count(fs->super))) {
4052                 if (fix_problem(ctx, PR_1_BB_ILLEGAL_BLOCK_NUM, pctx)) {
4053                         *block_nr = 0;
4054                         return BLOCK_CHANGED;
4055                 } else
4056                         return 0;
4057         }
4058
4059         if (blockcnt < 0) {
4060                 if (ext2fs_test_block_bitmap2(p->fs_meta_blocks, blk)) {
4061                         p->bbcheck = 1;
4062                         if (fix_problem(ctx, PR_1_BB_FS_BLOCK, pctx)) {
4063                                 *block_nr = 0;
4064                                 return BLOCK_CHANGED;
4065                         }
4066                 } else if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4067                                                     blk)) {
4068                         p->bbcheck = 1;
4069                         if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK,
4070                                         pctx)) {
4071                                 *block_nr = 0;
4072                                 return BLOCK_CHANGED;
4073                         }
4074                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
4075                                 return BLOCK_ABORT;
4076                 } else
4077                         mark_block_used(ctx, blk);
4078                 return 0;
4079         }
4080 #if 0
4081         printf ("DEBUG: Marking %u as bad.\n", blk);
4082 #endif
4083         ctx->fs_badblocks_count++;
4084         /*
4085          * If the block is not used, then mark it as used and return.
4086          * If it is already marked as found, this must mean that
4087          * there's an overlap between the filesystem table blocks
4088          * (bitmaps and inode table) and the bad block list.
4089          */
4090         if (!ext2fs_test_block_bitmap2(ctx->block_found_map, blk)) {
4091                 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4092                 return 0;
4093         }
4094         /*
4095          * Try to find the where the filesystem block was used...
4096          */
4097         first_block = fs->super->s_first_data_block;
4098
4099         for (i = 0; i < fs->group_desc_count; i++ ) {
4100                 pctx->group = i;
4101                 pctx->blk = blk;
4102                 if (!ext2fs_bg_has_super(fs, i))
4103                         goto skip_super;
4104                 if (blk == first_block) {
4105                         if (i == 0) {
4106                                 if (fix_problem(ctx,
4107                                                 PR_1_BAD_PRIMARY_SUPERBLOCK,
4108                                                 pctx)) {
4109                                         *block_nr = 0;
4110                                         return BLOCK_CHANGED;
4111                                 }
4112                                 return 0;
4113                         }
4114                         fix_problem(ctx, PR_1_BAD_SUPERBLOCK, pctx);
4115                         return 0;
4116                 }
4117                 if ((blk > first_block) &&
4118                     (blk <= first_block + fs->desc_blocks)) {
4119                         if (i == 0) {
4120                                 pctx->blk = *block_nr;
4121                                 if (fix_problem(ctx,
4122                         PR_1_BAD_PRIMARY_GROUP_DESCRIPTOR, pctx)) {
4123                                         *block_nr = 0;
4124                                         return BLOCK_CHANGED;
4125                                 }
4126                                 return 0;
4127                         }
4128                         fix_problem(ctx, PR_1_BAD_GROUP_DESCRIPTORS, pctx);
4129                         return 0;
4130                 }
4131         skip_super:
4132                 if (blk == ext2fs_block_bitmap_loc(fs, i)) {
4133                         if (fix_problem(ctx, PR_1_BB_BAD_BLOCK, pctx)) {
4134                                 ctx->invalid_block_bitmap_flag[i]++;
4135                                 ctx->invalid_bitmaps++;
4136                         }
4137                         return 0;
4138                 }
4139                 if (blk == ext2fs_inode_bitmap_loc(fs, i)) {
4140                         if (fix_problem(ctx, PR_1_IB_BAD_BLOCK, pctx)) {
4141                                 ctx->invalid_inode_bitmap_flag[i]++;
4142                                 ctx->invalid_bitmaps++;
4143                         }
4144                         return 0;
4145                 }
4146                 if ((blk >= ext2fs_inode_table_loc(fs, i)) &&
4147                     (blk < (ext2fs_inode_table_loc(fs, i) +
4148                             fs->inode_blocks_per_group))) {
4149                         /*
4150                          * If there are bad blocks in the inode table,
4151                          * the inode scan code will try to do
4152                          * something reasonable automatically.
4153                          */
4154                         return 0;
4155                 }
4156                 first_block += fs->super->s_blocks_per_group;
4157         }
4158         /*
4159          * If we've gotten to this point, then the only
4160          * possibility is that the bad block inode meta data
4161          * is using a bad block.
4162          */
4163         if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) ||
4164             (blk == p->inode->i_block[EXT2_DIND_BLOCK]) ||
4165             (blk == p->inode->i_block[EXT2_TIND_BLOCK])) {
4166                 p->bbcheck = 1;
4167                 if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, pctx)) {
4168                         *block_nr = 0;
4169                         return BLOCK_CHANGED;
4170                 }
4171                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
4172                         return BLOCK_ABORT;
4173                 return 0;
4174         }
4175
4176         pctx->group = -1;
4177
4178         /* Warn user that the block wasn't claimed */
4179         fix_problem(ctx, PR_1_PROGERR_CLAIMED_BLOCK, pctx);
4180
4181         return 0;
4182 }
4183
4184 static void new_table_block(e2fsck_t ctx, blk64_t first_block, dgrp_t group,
4185                             const char *name, int num, blk64_t *new_block)
4186 {
4187         ext2_filsys fs = ctx->fs;
4188         dgrp_t          last_grp;
4189         blk64_t         old_block = *new_block;
4190         blk64_t         last_block;
4191         dgrp_t          flexbg;
4192         unsigned        flexbg_size;
4193         int             i, is_flexbg;
4194         char            *buf;
4195         struct problem_context  pctx;
4196
4197         clear_problem_context(&pctx);
4198
4199         pctx.group = group;
4200         pctx.blk = old_block;
4201         pctx.str = name;
4202
4203         /*
4204          * For flex_bg filesystems, first try to allocate the metadata
4205          * within the flex_bg, and if that fails then try finding the
4206          * space anywhere in the filesystem.
4207          */
4208         is_flexbg = ext2fs_has_feature_flex_bg(fs->super);
4209         if (is_flexbg) {
4210                 flexbg_size = 1 << fs->super->s_log_groups_per_flex;
4211                 flexbg = group / flexbg_size;
4212                 first_block = ext2fs_group_first_block2(fs,
4213                                                         flexbg_size * flexbg);
4214                 last_grp = group | (flexbg_size - 1);
4215                 if (last_grp >= fs->group_desc_count)
4216                         last_grp = fs->group_desc_count - 1;
4217                 last_block = ext2fs_group_last_block2(fs, last_grp);
4218         } else
4219                 last_block = ext2fs_group_last_block2(fs, group);
4220         pctx.errcode = ext2fs_get_free_blocks2(fs, first_block, last_block,
4221                                                num, ctx->block_found_map,
4222                                                new_block);
4223         if (is_flexbg && (pctx.errcode == EXT2_ET_BLOCK_ALLOC_FAIL))
4224                 pctx.errcode = ext2fs_get_free_blocks2(fs,
4225                                 fs->super->s_first_data_block,
4226                                 ext2fs_blocks_count(fs->super),
4227                                 num, ctx->block_found_map, new_block);
4228         if (pctx.errcode) {
4229                 pctx.num = num;
4230                 fix_problem(ctx, PR_1_RELOC_BLOCK_ALLOCATE, &pctx);
4231                 ext2fs_unmark_valid(fs);
4232                 ctx->flags |= E2F_FLAG_ABORT;
4233                 return;
4234         }
4235         pctx.errcode = ext2fs_get_mem(fs->blocksize, &buf);
4236         if (pctx.errcode) {
4237                 fix_problem(ctx, PR_1_RELOC_MEMORY_ALLOCATE, &pctx);
4238                 ext2fs_unmark_valid(fs);
4239                 ctx->flags |= E2F_FLAG_ABORT;
4240                 return;
4241         }
4242         ext2fs_mark_super_dirty(fs);
4243         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
4244         pctx.blk2 = *new_block;
4245         fix_problem(ctx, (old_block ? PR_1_RELOC_FROM_TO :
4246                           PR_1_RELOC_TO), &pctx);
4247         pctx.blk2 = 0;
4248         for (i = 0; i < num; i++) {
4249                 pctx.blk = i;
4250                 ext2fs_mark_block_bitmap2(ctx->block_found_map, (*new_block)+i);
4251                 if (old_block) {
4252                         pctx.errcode = io_channel_read_blk64(fs->io,
4253                                    old_block + i, 1, buf);
4254                         if (pctx.errcode)
4255                                 fix_problem(ctx, PR_1_RELOC_READ_ERR, &pctx);
4256                         pctx.blk = (*new_block) + i;
4257                         pctx.errcode = io_channel_write_blk64(fs->io, pctx.blk,
4258                                                               1, buf);
4259                 } else {
4260                         pctx.blk = (*new_block) + i;
4261                         pctx.errcode = ext2fs_zero_blocks2(fs, pctx.blk, 1,
4262                                                            NULL, NULL);
4263                 }
4264
4265                 if (pctx.errcode)
4266                         fix_problem(ctx, PR_1_RELOC_WRITE_ERR, &pctx);
4267         }
4268         ext2fs_free_mem(&buf);
4269 }
4270
4271 /*
4272  * This routine gets called at the end of pass 1 if bad blocks are
4273  * detected in the superblock, group descriptors, inode_bitmaps, or
4274  * block bitmaps.  At this point, all of the blocks have been mapped
4275  * out, so we can try to allocate new block(s) to replace the bad
4276  * blocks.
4277  */
4278 static void handle_fs_bad_blocks(e2fsck_t ctx)
4279 {
4280         ext2_filsys fs = ctx->fs;
4281         dgrp_t          i;
4282         blk64_t         first_block;
4283         blk64_t         new_blk;
4284
4285         for (i = 0; i < fs->group_desc_count; i++) {
4286                 first_block = ext2fs_group_first_block2(fs, i);
4287
4288                 if (ctx->invalid_block_bitmap_flag[i]) {
4289                         new_blk = ext2fs_block_bitmap_loc(fs, i);
4290                         new_table_block(ctx, first_block, i, _("block bitmap"),
4291                                         1, &new_blk);
4292                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
4293                 }
4294                 if (ctx->invalid_inode_bitmap_flag[i]) {
4295                         new_blk = ext2fs_inode_bitmap_loc(fs, i);
4296                         new_table_block(ctx, first_block, i, _("inode bitmap"),
4297                                         1, &new_blk);
4298                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
4299                 }
4300                 if (ctx->invalid_inode_table_flag[i]) {
4301                         new_blk = ext2fs_inode_table_loc(fs, i);
4302                         new_table_block(ctx, first_block, i, _("inode table"),
4303                                         fs->inode_blocks_per_group,
4304                                         &new_blk);
4305                         ext2fs_inode_table_loc_set(fs, i, new_blk);
4306                         ctx->flags |= E2F_FLAG_RESTART;
4307                 }
4308         }
4309         ctx->invalid_bitmaps = 0;
4310 }
4311
4312 /*
4313  * This routine marks all blocks which are used by the superblock,
4314  * group descriptors, inode bitmaps, and block bitmaps.
4315  */
4316 static void mark_table_blocks(e2fsck_t ctx)
4317 {
4318         ext2_filsys fs = ctx->fs;
4319         blk64_t b;
4320         dgrp_t  i;
4321         unsigned int    j;
4322         struct problem_context pctx;
4323
4324         clear_problem_context(&pctx);
4325
4326         for (i = 0; i < fs->group_desc_count; i++) {
4327                 pctx.group = i;
4328
4329                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_found_map);
4330                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_metadata_map);
4331
4332                 /*
4333                  * Mark the blocks used for the inode table
4334                  */
4335                 if (ext2fs_inode_table_loc(fs, i)) {
4336                         for (j = 0, b = ext2fs_inode_table_loc(fs, i);
4337                              j < fs->inode_blocks_per_group;
4338                              j++, b++) {
4339                                 if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4340                                                              b)) {
4341                                         pctx.blk = b;
4342                                         if (!ctx->invalid_inode_table_flag[i] &&
4343                                             fix_problem(ctx,
4344                                                 PR_1_ITABLE_CONFLICT, &pctx)) {
4345                                                 ctx->invalid_inode_table_flag[i]++;
4346                                                 ctx->invalid_bitmaps++;
4347                                         }
4348                                 } else {
4349                                     ext2fs_mark_block_bitmap2(
4350                                                 ctx->block_found_map, b);
4351                                     ext2fs_mark_block_bitmap2(
4352                                                 ctx->block_metadata_map, b);
4353                                 }
4354                         }
4355                 }
4356
4357                 /*
4358                  * Mark block used for the block bitmap
4359                  */
4360                 if (ext2fs_block_bitmap_loc(fs, i)) {
4361                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4362                                      ext2fs_block_bitmap_loc(fs, i))) {
4363                                 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
4364                                 if (fix_problem(ctx, PR_1_BB_CONFLICT, &pctx)) {
4365                                         ctx->invalid_block_bitmap_flag[i]++;
4366                                         ctx->invalid_bitmaps++;
4367                                 }
4368                         } else {
4369                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4370                                      ext2fs_block_bitmap_loc(fs, i));
4371                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4372                                      ext2fs_block_bitmap_loc(fs, i));
4373                         }
4374                 }
4375                 /*
4376                  * Mark block used for the inode bitmap
4377                  */
4378                 if (ext2fs_inode_bitmap_loc(fs, i)) {
4379                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4380                                      ext2fs_inode_bitmap_loc(fs, i))) {
4381                                 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
4382                                 if (fix_problem(ctx, PR_1_IB_CONFLICT, &pctx)) {
4383                                         ctx->invalid_inode_bitmap_flag[i]++;
4384                                         ctx->invalid_bitmaps++;
4385                                 }
4386                         } else {
4387                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4388                                      ext2fs_inode_bitmap_loc(fs, i));
4389                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4390                                      ext2fs_inode_bitmap_loc(fs, i));
4391                         }
4392                 }
4393         }
4394 }
4395
4396 /*
4397  * These subroutines short circuits ext2fs_get_blocks and
4398  * ext2fs_check_directory; we use them since we already have the inode
4399  * structure, so there's no point in letting the ext2fs library read
4400  * the inode again.
4401  */
4402 static errcode_t pass1_get_blocks(ext2_filsys fs, ext2_ino_t ino,
4403                                   blk_t *blocks)
4404 {
4405         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4406         int     i;
4407
4408         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4409                 return EXT2_ET_CALLBACK_NOTHANDLED;
4410
4411         for (i=0; i < EXT2_N_BLOCKS; i++)
4412                 blocks[i] = ctx->stashed_inode->i_block[i];
4413         return 0;
4414 }
4415
4416 static errcode_t pass1_read_inode(ext2_filsys fs, ext2_ino_t ino,
4417                                   struct ext2_inode *inode)
4418 {
4419         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4420
4421         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4422                 return EXT2_ET_CALLBACK_NOTHANDLED;
4423         *inode = *ctx->stashed_inode;
4424         return 0;
4425 }
4426
4427 static errcode_t pass1_write_inode(ext2_filsys fs, ext2_ino_t ino,
4428                             struct ext2_inode *inode)
4429 {
4430         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4431
4432         if ((ino == ctx->stashed_ino) && ctx->stashed_inode &&
4433                 (inode != ctx->stashed_inode))
4434                 *ctx->stashed_inode = *inode;
4435         return EXT2_ET_CALLBACK_NOTHANDLED;
4436 }
4437
4438 static errcode_t pass1_check_directory(ext2_filsys fs, ext2_ino_t ino)
4439 {
4440         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4441
4442         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4443                 return EXT2_ET_CALLBACK_NOTHANDLED;
4444
4445         if (!LINUX_S_ISDIR(ctx->stashed_inode->i_mode))
4446                 return EXT2_ET_NO_DIRECTORY;
4447         return 0;
4448 }
4449
4450 static errcode_t e2fsck_get_alloc_block(ext2_filsys fs, blk64_t goal,
4451                                         blk64_t *ret)
4452 {
4453         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4454         errcode_t       retval;
4455         blk64_t         new_block;
4456
4457         if (ctx->block_found_map) {
4458                 retval = ext2fs_new_block2(fs, goal, ctx->block_found_map,
4459                                            &new_block);
4460                 if (retval)
4461                         return retval;
4462                 if (fs->block_map) {
4463                         ext2fs_mark_block_bitmap2(fs->block_map, new_block);
4464                         ext2fs_mark_bb_dirty(fs);
4465                 }
4466         } else {
4467                 if (!fs->block_map) {
4468                         retval = ext2fs_read_block_bitmap(fs);
4469                         if (retval)
4470                                 return retval;
4471                 }
4472
4473                 retval = ext2fs_new_block2(fs, goal, fs->block_map, &new_block);
4474                 if (retval)
4475                         return retval;
4476         }
4477
4478         *ret = new_block;
4479         return (0);
4480 }
4481
4482 static errcode_t e2fsck_new_range(ext2_filsys fs, int flags, blk64_t goal,
4483                                   blk64_t len, blk64_t *pblk, blk64_t *plen)
4484 {
4485         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4486         errcode_t       retval;
4487
4488         if (ctx->block_found_map)
4489                 return ext2fs_new_range(fs, flags, goal, len,
4490                                         ctx->block_found_map, pblk, plen);
4491
4492         if (!fs->block_map) {
4493                 retval = ext2fs_read_block_bitmap(fs);
4494                 if (retval)
4495                         return retval;
4496         }
4497
4498         return ext2fs_new_range(fs, flags, goal, len, fs->block_map,
4499                                 pblk, plen);
4500 }
4501
4502 static void e2fsck_block_alloc_stats(ext2_filsys fs, blk64_t blk, int inuse)
4503 {
4504         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4505
4506         /* Never free a critical metadata block */
4507         if (ctx->block_found_map &&
4508             ctx->block_metadata_map &&
4509             inuse < 0 &&
4510             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk))
4511                 return;
4512
4513         if (ctx->block_found_map) {
4514                 if (inuse > 0)
4515                         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4516                 else
4517                         ext2fs_unmark_block_bitmap2(ctx->block_found_map, blk);
4518         }
4519 }
4520
4521 static void e2fsck_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
4522                                            blk_t num, int inuse)
4523 {
4524         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4525
4526         /* Never free a critical metadata block */
4527         if (ctx->block_found_map &&
4528             ctx->block_metadata_map &&
4529             inuse < 0 &&
4530             ext2fs_test_block_bitmap_range2(ctx->block_metadata_map, blk, num))
4531                 return;
4532
4533         if (ctx->block_found_map) {
4534                 if (inuse > 0)
4535                         ext2fs_mark_block_bitmap_range2(ctx->block_found_map,
4536                                                         blk, num);
4537                 else
4538                         ext2fs_unmark_block_bitmap_range2(ctx->block_found_map,
4539                                                         blk, num);
4540         }
4541 }
4542
4543 void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts)
4544 {
4545         ext2_filsys fs = ctx->fs;
4546
4547         if (use_shortcuts) {
4548                 fs->get_blocks = pass1_get_blocks;
4549                 fs->check_directory = pass1_check_directory;
4550                 fs->read_inode = pass1_read_inode;
4551                 fs->write_inode = pass1_write_inode;
4552                 ctx->stashed_ino = 0;
4553         } else {
4554                 fs->get_blocks = 0;
4555                 fs->check_directory = 0;
4556                 fs->read_inode = 0;
4557                 fs->write_inode = 0;
4558         }
4559 }
4560
4561 void e2fsck_intercept_block_allocations(e2fsck_t ctx)
4562 {
4563         ext2fs_set_alloc_block_callback(ctx->fs, e2fsck_get_alloc_block, 0);
4564         ext2fs_set_block_alloc_stats_callback(ctx->fs,
4565                                                 e2fsck_block_alloc_stats, 0);
4566         ext2fs_set_new_range_callback(ctx->fs, e2fsck_new_range, NULL);
4567         ext2fs_set_block_alloc_stats_range_callback(ctx->fs,
4568                                         e2fsck_block_alloc_stats_range, NULL);
4569 }