e2fsck/pass1.c

   1 /*
   2  * pass1.c -- pass #1 of e2fsck: sequential scan of the inode table
   3  *
   4  * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Public
   8  * License.
   9  * %End-Header%
  10  *
  11  * Pass 1 of e2fsck iterates over all the inodes in the filesystems,
  12  * and applies the following tests to each inode:
  13  *
  14  *      - The mode field of the inode must be legal.
  15  *      - The size and block count fields of the inode are correct.
  16  *      - A data block must not be used by another inode
  17  *
  18  * Pass 1 also gathers the collects the following information:
  19  *
  20  *      - A bitmap of which inodes are in use.          (inode_used_map)
  21  *      - A bitmap of which inodes are directories.     (inode_dir_map)
  22  *      - A bitmap of which inodes are regular files.   (inode_reg_map)
  23  *      - A bitmap of which inodes have bad fields.     (inode_bad_map)
  24  *      - A bitmap of which inodes are in bad blocks.   (inode_bb_map)
  25  *      - A bitmap of which inodes are imagic inodes.   (inode_imagic_map)
  26  *      - A bitmap of which blocks are in use.          (block_found_map)
  27  *      - A bitmap of which blocks are in use by two inodes     (block_dup_map)
  28  *      - The data blocks of the directory inodes.      (dir_map)
  29  *      - Ref counts for ea_inodes.                     (ea_inode_refs)
  30  *
  31  * Pass 1 is designed to stash away enough information so that the
  32  * other passes should not need to read in the inode information
  33  * during the normal course of a filesystem check.  (Although if an
  34  * inconsistency is detected, other passes may need to read in an
  35  * inode to fix it.)
  36  *
  37  * Note that pass 1B will be invoked if there are any duplicate blocks
  38  * found.
  39  */
  40
  41 #define _GNU_SOURCE 1 /* get strnlen() */
  42 #include "config.h"
  43 #include <string.h>
  44 #include <time.h>
  45 #ifdef HAVE_ERRNO_H
  46 #include <errno.h>
  47 #endif
  48
  49 #include "e2fsck.h"
  50 #include <ext2fs/ext2_ext_attr.h>
  51
  52 #include "problem.h"
  53
  54 #ifdef NO_INLINE_FUNCS
  55 #define _INLINE_
  56 #else
  57 #define _INLINE_ inline
  58 #endif
  59
  60 #undef DEBUG
  61
  62 struct ea_quota {
  63         blk64_t blocks;
  64         __u64 inodes;
  65 };
  66
  67 static int process_block(ext2_filsys fs, blk64_t        *blocknr,
  68                          e2_blkcnt_t blockcnt, blk64_t ref_blk,
  69                          int ref_offset, void *priv_data);
  70 static int process_bad_block(ext2_filsys fs, blk64_t *block_nr,
  71                              e2_blkcnt_t blockcnt, blk64_t ref_blk,
  72                              int ref_offset, void *priv_data);
  73 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
  74                          char *block_buf,
  75                          const struct ea_quota *ea_ibody_quota);
  76 static void mark_table_blocks(e2fsck_t ctx);
  77 static void alloc_bb_map(e2fsck_t ctx);
  78 static void alloc_imagic_map(e2fsck_t ctx);
  79 static void mark_inode_bad(e2fsck_t ctx, ino_t ino);
  80 static void add_encrypted_dir(e2fsck_t ctx, ino_t ino);
  81 static void handle_fs_bad_blocks(e2fsck_t ctx);
  82 static void process_inodes(e2fsck_t ctx, char *block_buf);
  83 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b);
  84 static errcode_t scan_callback(ext2_filsys fs, ext2_inode_scan scan,
  85                                   dgrp_t group, void * priv_data);
  86 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
  87                                     char *block_buf, int adjust_sign);
  88 /* static char *describe_illegal_block(ext2_filsys fs, blk64_t block); */
  89
  90 struct process_block_struct {
  91         ext2_ino_t      ino;
  92         unsigned        is_dir:1, is_reg:1, clear:1, suppress:1,
  93                                 fragmented:1, compressed:1, bbcheck:1,
  94                                 inode_modified:1;
  95         blk64_t         num_blocks;
  96         blk64_t         max_blocks;
  97         blk64_t         last_block;
  98         e2_blkcnt_t     last_init_lblock;
  99         e2_blkcnt_t     last_db_block;
 100         int             num_illegal_blocks;
 101         blk64_t         previous_block;
 102         struct ext2_inode *inode;
 103         struct problem_context *pctx;
 104         ext2fs_block_bitmap fs_meta_blocks;
 105         e2fsck_t        ctx;
 106         blk64_t         next_lblock;
 107         struct extent_tree_info eti;
 108 };
 109
 110 struct process_inode_block {
 111         ext2_ino_t ino;
 112         struct ea_quota ea_ibody_quota;
 113         struct ext2_inode_large inode;
 114 };
 115
 116 struct scan_callback_struct {
 117         e2fsck_t        ctx;
 118         char            *block_buf;
 119 };
 120
 121 /*
 122  * For the inodes to process list.
 123  */
 124 static struct process_inode_block *inodes_to_process;
 125 static int process_inode_count;
 126
 127 static __u64 ext2_max_sizes[EXT2_MAX_BLOCK_LOG_SIZE -
 128                             EXT2_MIN_BLOCK_LOG_SIZE + 1];
 129
 130 /*
 131  * Free all memory allocated by pass1 in preparation for restarting
 132  * things.
 133  */
 134 static void unwind_pass1(ext2_filsys fs EXT2FS_ATTR((unused)))
 135 {
 136         ext2fs_free_mem(&inodes_to_process);
 137         inodes_to_process = 0;
 138 }
 139
 140 /*
 141  * Check to make sure a device inode is real.  Returns 1 if the device
 142  * checks out, 0 if not.
 143  *
 144  * Note: this routine is now also used to check FIFO's and Sockets,
 145  * since they have the same requirement; the i_block fields should be
 146  * zero.
 147  */
 148 int e2fsck_pass1_check_device_inode(ext2_filsys fs EXT2FS_ATTR((unused)),
 149                                     struct ext2_inode *inode)
 150 {
 151         int     i;
 152
 153         /*
 154          * If the index flag is set, then this is a bogus
 155          * device/fifo/socket
 156          */
 157         if (inode->i_flags & EXT2_INDEX_FL)
 158                 return 0;
 159
 160         /*
 161          * We should be able to do the test below all the time, but
 162          * because the kernel doesn't forcibly clear the device
 163          * inode's additional i_block fields, there are some rare
 164          * occasions when a legitimate device inode will have non-zero
 165          * additional i_block fields.  So for now, we only complain
 166          * when the immutable flag is set, which should never happen
 167          * for devices.  (And that's when the problem is caused, since
 168          * you can't set or clear immutable flags for devices.)  Once
 169          * the kernel has been fixed we can change this...
 170          */
 171         if (inode->i_flags & (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)) {
 172                 for (i=4; i < EXT2_N_BLOCKS; i++)
 173                         if (inode->i_block[i])
 174                                 return 0;
 175         }
 176         return 1;
 177 }
 178
 179 /*
 180  * Check to make sure a symlink inode is real.  Returns 1 if the symlink
 181  * checks out, 0 if not.
 182  */
 183 int e2fsck_pass1_check_symlink(ext2_filsys fs, ext2_ino_t ino,
 184                                struct ext2_inode *inode, char *buf)
 185 {
 186         unsigned int len;
 187         int i;
 188         ext2_extent_handle_t    handle;
 189         struct ext2_extent_info info;
 190         struct ext2fs_extent    extent;
 191
 192         if ((inode->i_size_high || inode->i_size == 0) ||
 193             (inode->i_flags & EXT2_INDEX_FL))
 194                 return 0;
 195
 196         if (inode->i_flags & EXT4_EXTENTS_FL) {
 197                 if (inode->i_flags & EXT4_INLINE_DATA_FL)
 198                         return 0;
 199                 if (inode->i_size > fs->blocksize)
 200                         return 0;
 201                 if (ext2fs_extent_open2(fs, ino, inode, &handle))
 202                         return 0;
 203                 i = 0;
 204                 if (ext2fs_extent_get_info(handle, &info) ||
 205                     (info.num_entries != 1) ||
 206                     (info.max_depth != 0))
 207                         goto exit_extent;
 208                 if (ext2fs_extent_get(handle, EXT2_EXTENT_ROOT, &extent) ||
 209                     (extent.e_lblk != 0) ||
 210                     (extent.e_len != 1) ||
 211                     (extent.e_pblk < fs->super->s_first_data_block) ||
 212                     (extent.e_pblk >= ext2fs_blocks_count(fs->super)))
 213                         goto exit_extent;
 214                 i = 1;
 215         exit_extent:
 216                 ext2fs_extent_free(handle);
 217                 return i;
 218         }
 219
 220         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
 221                 size_t inline_size;
 222
 223                 if (ext2fs_inline_data_size(fs, ino, &inline_size))
 224                         return 0;
 225                 if (inode->i_size != inline_size)
 226                         return 0;
 227
 228                 return 1;
 229         }
 230
 231         if (ext2fs_is_fast_symlink(inode)) {
 232                 if (inode->i_size >= sizeof(inode->i_block))
 233                         return 0;
 234
 235                 len = strnlen((char *)inode->i_block, sizeof(inode->i_block));
 236                 if (len == sizeof(inode->i_block))
 237                         return 0;
 238         } else {
 239                 if ((inode->i_size >= fs->blocksize) ||
 240                     (inode->i_block[0] < fs->super->s_first_data_block) ||
 241                     (inode->i_block[0] >= ext2fs_blocks_count(fs->super)))
 242                         return 0;
 243
 244                 for (i = 1; i < EXT2_N_BLOCKS; i++)
 245                         if (inode->i_block[i])
 246                                 return 0;
 247
 248                 if (io_channel_read_blk64(fs->io, inode->i_block[0], 1, buf))
 249                         return 0;
 250
 251                 if (inode->i_flags & EXT4_ENCRYPT_FL) {
 252                         len = ext2fs_le16_to_cpu(*((__u16 *)buf)) + 2;
 253                 } else {
 254                         len = strnlen(buf, fs->blocksize);
 255                 }
 256                 if (len >= fs->blocksize)
 257                         return 0;
 258         }
 259         if (len != inode->i_size)
 260                 if ((inode->i_flags & EXT4_ENCRYPT_FL) == 0)
 261                         return 0;
 262         return 1;
 263 }
 264
 265 /*
 266  * If the extents or inlinedata flags are set on the inode, offer to clear 'em.
 267  */
 268 #define BAD_SPECIAL_FLAGS (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)
 269 static void check_extents_inlinedata(e2fsck_t ctx,
 270                                      struct problem_context *pctx)
 271 {
 272         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 273                 return;
 274
 275         if (!fix_problem(ctx, PR_1_SPECIAL_EXTENTS_IDATA, pctx))
 276                 return;
 277
 278         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 279         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 280 }
 281 #undef BAD_SPECIAL_FLAGS
 282
 283 /*
 284  * If the immutable (or append-only) flag is set on the inode, offer
 285  * to clear it.
 286  */
 287 #define BAD_SPECIAL_FLAGS (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)
 288 static void check_immutable(e2fsck_t ctx, struct problem_context *pctx)
 289 {
 290         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 291                 return;
 292
 293         if (!fix_problem(ctx, PR_1_SET_IMMUTABLE, pctx))
 294                 return;
 295
 296         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 297         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 298 }
 299
 300 /*
 301  * If device, fifo or socket, check size is zero -- if not offer to
 302  * clear it
 303  */
 304 static void check_size(e2fsck_t ctx, struct problem_context *pctx)
 305 {
 306         struct ext2_inode *inode = pctx->inode;
 307
 308         if (EXT2_I_SIZE(inode) == 0)
 309                 return;
 310
 311         if (!fix_problem(ctx, PR_1_SET_NONZSIZE, pctx))
 312                 return;
 313
 314         ext2fs_inode_size_set(ctx->fs, inode, 0);
 315         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 316 }
 317
 318 /*
 319  * For a given size, calculate how many blocks would be charged towards quota.
 320  */
 321 static blk64_t size_to_quota_blocks(ext2_filsys fs, size_t size)
 322 {
 323         blk64_t clusters;
 324
 325         clusters = DIV_ROUND_UP(size, fs->blocksize << fs->cluster_ratio_bits);
 326         return EXT2FS_C2B(fs, clusters);
 327 }
 328
 329 /*
 330  * Check validity of EA inode. Return 0 if EA inode is valid, otherwise return
 331  * the problem code.
 332  */
 333 static problem_t check_large_ea_inode(e2fsck_t ctx,
 334                                       struct ext2_ext_attr_entry *entry,
 335                                       struct problem_context *pctx,
 336                                       blk64_t *quota_blocks)
 337 {
 338         struct ext2_inode inode;
 339         __u32 hash;
 340         errcode_t retval;
 341
 342         /* Check if inode is within valid range */
 343         if ((entry->e_value_inum < EXT2_FIRST_INODE(ctx->fs->super)) ||
 344             (entry->e_value_inum > ctx->fs->super->s_inodes_count)) {
 345                 pctx->num = entry->e_value_inum;
 346                 return PR_1_ATTR_VALUE_EA_INODE;
 347         }
 348
 349         e2fsck_read_inode(ctx, entry->e_value_inum, &inode, "pass1");
 350
 351         retval = ext2fs_ext_attr_hash_entry2(ctx->fs, entry, NULL, &hash);
 352         if (retval) {
 353                 com_err("check_large_ea_inode", retval,
 354                         _("while hashing entry with e_value_inum = %u"),
 355                         entry->e_value_inum);
 356                 fatal_error(ctx, 0);
 357         }
 358
 359         if (hash == entry->e_hash) {
 360                 *quota_blocks = size_to_quota_blocks(ctx->fs,
 361                                                      entry->e_value_size);
 362         } else {
 363                 /* This might be an old Lustre-style ea_inode reference. */
 364                 if (inode.i_mtime == pctx->ino &&
 365                     inode.i_generation == pctx->inode->i_generation) {
 366                         *quota_blocks = 0;
 367                 } else {
 368                         /* If target inode is also missing EA_INODE flag,
 369                          * this is likely to be a bad reference.
 370                          */
 371                         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 372                                 pctx->num = entry->e_value_inum;
 373                                 return PR_1_ATTR_VALUE_EA_INODE;
 374                         } else {
 375                                 pctx->num = entry->e_hash;
 376                                 return PR_1_ATTR_HASH;
 377                         }
 378                 }
 379         }
 380
 381         if (!(inode.i_flags & EXT4_EA_INODE_FL)) {
 382                 pctx->num = entry->e_value_inum;
 383                 if (fix_problem(ctx, PR_1_ATTR_SET_EA_INODE_FL, pctx)) {
 384                         inode.i_flags |= EXT4_EA_INODE_FL;
 385                         ext2fs_write_inode(ctx->fs, entry->e_value_inum,
 386                                            &inode);
 387                 } else {
 388                         return PR_1_ATTR_NO_EA_INODE_FL;
 389                 }
 390         }
 391         return 0;
 392 }
 393
 394 static void inc_ea_inode_refs(e2fsck_t ctx, struct problem_context *pctx,
 395                               struct ext2_ext_attr_entry *first, void *end)
 396 {
 397         struct ext2_ext_attr_entry *entry;
 398
 399         for (entry = first;
 400              (void *)entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry);
 401              entry = EXT2_EXT_ATTR_NEXT(entry)) {
 402                 if (!entry->e_value_inum)
 403                         continue;
 404                 if (!ctx->ea_inode_refs) {
 405                         pctx->errcode = ea_refcount_create(0,
 406                                                            &ctx->ea_inode_refs);
 407                         if (pctx->errcode) {
 408                                 pctx->num = 4;
 409                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
 410                                 ctx->flags |= E2F_FLAG_ABORT;
 411                                 return;
 412                         }
 413                 }
 414                 ea_refcount_increment(ctx->ea_inode_refs, entry->e_value_inum,
 415                                       0);
 416         }
 417 }
 418
 419 static void check_ea_in_inode(e2fsck_t ctx, struct problem_context *pctx,
 420                               struct ea_quota *ea_ibody_quota)
 421 {
 422         struct ext2_super_block *sb = ctx->fs->super;
 423         struct ext2_inode_large *inode;
 424         struct ext2_ext_attr_entry *entry;
 425         char *start, *header, *end;
 426         unsigned int storage_size, remain;
 427         problem_t problem = 0;
 428         region_t region = 0;
 429
 430         ea_ibody_quota->blocks = 0;
 431         ea_ibody_quota->inodes = 0;
 432
 433         inode = (struct ext2_inode_large *) pctx->inode;
 434         storage_size = EXT2_INODE_SIZE(ctx->fs->super) - EXT2_GOOD_OLD_INODE_SIZE -
 435                 inode->i_extra_isize;
 436         header = ((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 437                  inode->i_extra_isize;
 438         end = header + storage_size;
 439         start = header + sizeof(__u32);
 440         entry = (struct ext2_ext_attr_entry *) start;
 441
 442         /* scan all entry's headers first */
 443
 444         /* take finish entry 0UL into account */
 445         remain = storage_size - sizeof(__u32);
 446
 447         region = region_create(0, storage_size);
 448         if (!region) {
 449                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
 450                 problem = 0;
 451                 ctx->flags |= E2F_FLAG_ABORT;
 452                 return;
 453         }
 454         if (region_allocate(region, 0, sizeof(__u32))) {
 455                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 456                 goto fix;
 457         }
 458
 459         while (remain >= sizeof(struct ext2_ext_attr_entry) &&
 460                !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 461                 __u32 hash;
 462
 463                 if (region_allocate(region, (char *)entry - (char *)header,
 464                                     EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
 465                         problem = PR_1_INODE_EA_ALLOC_COLLISION;
 466                         goto fix;
 467                 }
 468
 469                 /* header eats this space */
 470                 remain -= sizeof(struct ext2_ext_attr_entry);
 471
 472                 /* is attribute name valid? */
 473                 if (EXT2_EXT_ATTR_SIZE(entry->e_name_len) > remain) {
 474                         pctx->num = entry->e_name_len;
 475                         problem = PR_1_ATTR_NAME_LEN;
 476                         goto fix;
 477                 }
 478
 479                 /* attribute len eats this space */
 480                 remain -= EXT2_EXT_ATTR_SIZE(entry->e_name_len);
 481
 482                 if (entry->e_value_inum == 0) {
 483                         /* check value size */
 484                         if (entry->e_value_size > remain) {
 485                                 pctx->num = entry->e_value_size;
 486                                 problem = PR_1_ATTR_VALUE_SIZE;
 487                                 goto fix;
 488                         }
 489
 490                         if (entry->e_value_size &&
 491                             region_allocate(region,
 492                                             sizeof(__u32) + entry->e_value_offs,
 493                                             EXT2_EXT_ATTR_SIZE(
 494                                                 entry->e_value_size))) {
 495                                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 496                                 goto fix;
 497                         }
 498
 499                         hash = ext2fs_ext_attr_hash_entry(entry,
 500                                                           start + entry->e_value_offs);
 501
 502                         /* e_hash may be 0 in older inode's ea */
 503                         if (entry->e_hash != 0 && entry->e_hash != hash) {
 504                                 pctx->num = entry->e_hash;
 505                                 problem = PR_1_ATTR_HASH;
 506                                 goto fix;
 507                         }
 508                 } else {
 509                         blk64_t quota_blocks;
 510
 511                         problem = check_large_ea_inode(ctx, entry, pctx,
 512                                                        &quota_blocks);
 513                         if (problem != 0)
 514                                 goto fix;
 515
 516                         ea_ibody_quota->blocks += quota_blocks;
 517                         ea_ibody_quota->inodes++;
 518                 }
 519
 520                 /* If EA value is stored in external inode then it does not
 521                  * consume space here */
 522                 if (entry->e_value_inum == 0)
 523                         remain -= entry->e_value_size;
 524
 525                 entry = EXT2_EXT_ATTR_NEXT(entry);
 526         }
 527
 528         if (region_allocate(region, (char *)entry - (char *)header,
 529                             sizeof(__u32))) {
 530                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 531                 goto fix;
 532         }
 533 fix:
 534         if (region)
 535                 region_free(region);
 536         /*
 537          * it seems like a corruption. it's very unlikely we could repair
 538          * EA(s) in automatic fashion -bzzz
 539          */
 540         if (problem == 0 || !fix_problem(ctx, problem, pctx)) {
 541                 inc_ea_inode_refs(ctx, pctx,
 542                                   (struct ext2_ext_attr_entry *)start, end);
 543                 return;
 544         }
 545
 546         /* simply remove all possible EA(s) */
 547         *((__u32 *)header) = 0UL;
 548         e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 549                                 EXT2_INODE_SIZE(sb), "pass1");
 550         ea_ibody_quota->blocks = 0;
 551         ea_ibody_quota->inodes = 0;
 552 }
 553
 554 static int check_inode_extra_negative_epoch(__u32 xtime, __u32 extra) {
 555         return (xtime & (1U << 31)) != 0 &&
 556                 (extra & EXT4_EPOCH_MASK) == EXT4_EPOCH_MASK;
 557 }
 558
 559 #define CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, xtime) \
 560         check_inode_extra_negative_epoch(inode->i_##xtime, \
 561                                          inode->i_##xtime##_extra)
 562
 563 /* When today's date is earlier than 2242, we assume that atimes,
 564  * ctimes, crtimes, and mtimes with years in the range 2310..2378 are
 565  * actually pre-1970 dates mis-encoded.
 566  */
 567 #define EXT4_EXTRA_NEGATIVE_DATE_CUTOFF 2 * (1LL << 32)
 568
 569 static void check_inode_extra_space(e2fsck_t ctx, struct problem_context *pctx,
 570                                     struct ea_quota *ea_ibody_quota)
 571 {
 572         struct ext2_super_block *sb = ctx->fs->super;
 573         struct ext2_inode_large *inode;
 574         __u32 *eamagic;
 575         int min, max;
 576
 577         ea_ibody_quota->blocks = 0;
 578         ea_ibody_quota->inodes = 0;
 579
 580         inode = (struct ext2_inode_large *) pctx->inode;
 581         if (EXT2_INODE_SIZE(sb) == EXT2_GOOD_OLD_INODE_SIZE) {
 582                 /* this isn't large inode. so, nothing to check */
 583                 return;
 584         }
 585
 586 #if 0
 587         printf("inode #%u, i_extra_size %d\n", pctx->ino,
 588                         inode->i_extra_isize);
 589 #endif
 590         /* i_extra_isize must cover i_extra_isize + i_checksum_hi at least */
 591         min = sizeof(inode->i_extra_isize) + sizeof(inode->i_checksum_hi);
 592         max = EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE;
 593         /*
 594          * For now we will allow i_extra_isize to be 0, but really
 595          * implementations should never allow i_extra_isize to be 0
 596          */
 597         if (inode->i_extra_isize &&
 598             (inode->i_extra_isize < min || inode->i_extra_isize > max ||
 599              inode->i_extra_isize & 3)) {
 600                 if (!fix_problem(ctx, PR_1_EXTRA_ISIZE, pctx))
 601                         return;
 602                 if (inode->i_extra_isize < min || inode->i_extra_isize > max)
 603                         inode->i_extra_isize = sb->s_want_extra_isize;
 604                 else
 605                         inode->i_extra_isize = (inode->i_extra_isize + 3) & ~3;
 606                 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 607                                         EXT2_INODE_SIZE(sb), "pass1");
 608         }
 609
 610         /* check if there is no place for an EA header */
 611         if (inode->i_extra_isize >= max - sizeof(__u32))
 612                 return;
 613
 614         eamagic = (__u32 *) (((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 615                         inode->i_extra_isize);
 616         if (*eamagic == EXT2_EXT_ATTR_MAGIC) {
 617                 /* it seems inode has an extended attribute(s) in body */
 618                 check_ea_in_inode(ctx, pctx, ea_ibody_quota);
 619         }
 620
 621         /*
 622          * If the inode's extended atime (ctime, crtime, mtime) is stored in
 623          * the old, invalid format, repair it.
 624          */
 625         if (((sizeof(time_t) <= 4) ||
 626              (((sizeof(time_t) > 4) &&
 627                ctx->now < EXT4_EXTRA_NEGATIVE_DATE_CUTOFF))) &&
 628             (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime) ||
 629              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime) ||
 630              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime) ||
 631              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))) {
 632
 633                 if (!fix_problem(ctx, PR_1_EA_TIME_OUT_OF_RANGE, pctx))
 634                         return;
 635
 636                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime))
 637                         inode->i_atime_extra &= ~EXT4_EPOCH_MASK;
 638                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime))
 639                         inode->i_ctime_extra &= ~EXT4_EPOCH_MASK;
 640                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime))
 641                         inode->i_crtime_extra &= ~EXT4_EPOCH_MASK;
 642                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))
 643                         inode->i_mtime_extra &= ~EXT4_EPOCH_MASK;
 644                 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 645                                         EXT2_INODE_SIZE(sb), "pass1");
 646         }
 647
 648 }
 649
 650 /*
 651  * Check to see if the inode might really be a directory, despite i_mode
 652  *
 653  * This is a lot of complexity for something for which I'm not really
 654  * convinced happens frequently in the wild.  If for any reason this
 655  * causes any problems, take this code out.
 656  * [tytso:20070331.0827EDT]
 657  */
 658 static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx,
 659                                 char *buf)
 660 {
 661         struct ext2_inode *inode = pctx->inode;
 662         struct ext2_dir_entry   *dirent;
 663         errcode_t               retval;
 664         blk64_t                 blk;
 665         unsigned int            i, rec_len, not_device = 0;
 666         int                     extent_fs;
 667         int                     inlinedata_fs;
 668
 669         /*
 670          * If the mode looks OK, we believe it.  If the first block in
 671          * the i_block array is 0, this cannot be a directory. If the
 672          * inode is extent-mapped, it is still the case that the latter
 673          * cannot be 0 - the magic number in the extent header would make
 674          * it nonzero.
 675          */
 676         if (LINUX_S_ISDIR(inode->i_mode) || LINUX_S_ISREG(inode->i_mode) ||
 677             LINUX_S_ISLNK(inode->i_mode) || inode->i_block[0] == 0)
 678                 return;
 679
 680         /*
 681          * Check the block numbers in the i_block array for validity:
 682          * zero blocks are skipped (but the first one cannot be zero -
 683          * see above), other blocks are checked against the first and
 684          * max data blocks (from the the superblock) and against the
 685          * block bitmap. Any invalid block found means this cannot be
 686          * a directory.
 687          *
 688          * If there are non-zero blocks past the fourth entry, then
 689          * this cannot be a device file: we remember that for the next
 690          * check.
 691          *
 692          * For extent mapped files, we don't do any sanity checking:
 693          * just try to get the phys block of logical block 0 and run
 694          * with it.
 695          *
 696          * For inline data files, we just try to get the size of inline
 697          * data.  If it's true, we will treat it as a directory.
 698          */
 699
 700         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
 701         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
 702         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL)) {
 703                 size_t size;
 704                 __u32 dotdot;
 705                 unsigned int rec_len2;
 706                 struct ext2_dir_entry de;
 707
 708                 if (ext2fs_inline_data_size(ctx->fs, pctx->ino, &size))
 709                         return;
 710                 /*
 711                  * If the size isn't a multiple of 4, it's probably not a
 712                  * directory??
 713                  */
 714                 if (size & 3)
 715                         return;
 716                 /*
 717                  * If the first 10 bytes don't look like a directory entry,
 718                  * it's probably not a directory.
 719                  */
 720                 memcpy(&dotdot, inode->i_block, sizeof(dotdot));
 721                 memcpy(&de, ((char *)inode->i_block) + EXT4_INLINE_DATA_DOTDOT_SIZE,
 722                        EXT2_DIR_REC_LEN(0));
 723                 dotdot = ext2fs_le32_to_cpu(dotdot);
 724                 de.inode = ext2fs_le32_to_cpu(de.inode);
 725                 de.rec_len = ext2fs_le16_to_cpu(de.rec_len);
 726                 ext2fs_get_rec_len(ctx->fs, &de, &rec_len2);
 727                 if (dotdot >= ctx->fs->super->s_inodes_count ||
 728                     (dotdot < EXT2_FIRST_INO(ctx->fs->super) &&
 729                      dotdot != EXT2_ROOT_INO) ||
 730                     de.inode >= ctx->fs->super->s_inodes_count ||
 731                     (de.inode < EXT2_FIRST_INO(ctx->fs->super) &&
 732                      de.inode != 0) ||
 733                     rec_len2 > EXT4_MIN_INLINE_DATA_SIZE -
 734                               EXT4_INLINE_DATA_DOTDOT_SIZE)
 735                         return;
 736                 /* device files never have a "system.data" entry */
 737                 goto isdir;
 738         } else if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) {
 739                 /* extent mapped */
 740                 if  (ext2fs_bmap2(ctx->fs, pctx->ino, inode, 0, 0, 0, 0,
 741                                  &blk))
 742                         return;
 743                 /* device files are never extent mapped */
 744                 not_device++;
 745         } else {
 746                 for (i=0; i < EXT2_N_BLOCKS; i++) {
 747                         blk = inode->i_block[i];
 748                         if (!blk)
 749                                 continue;
 750                         if (i >= 4)
 751                                 not_device++;
 752
 753                         if (blk < ctx->fs->super->s_first_data_block ||
 754                             blk >= ext2fs_blocks_count(ctx->fs->super) ||
 755                             ext2fs_fast_test_block_bitmap2(ctx->block_found_map,
 756                                                            blk))
 757                                 return; /* Invalid block, can't be dir */
 758                 }
 759                 blk = inode->i_block[0];
 760         }
 761
 762         /*
 763          * If the mode says this is a device file and the i_links_count field
 764          * is sane and we have not ruled it out as a device file previously,
 765          * we declare it a device file, not a directory.
 766          */
 767         if ((LINUX_S_ISCHR(inode->i_mode) || LINUX_S_ISBLK(inode->i_mode)) &&
 768             (inode->i_links_count == 1) && !not_device)
 769                 return;
 770
 771         /* read the first block */
 772         ehandler_operation(_("reading directory block"));
 773         retval = ext2fs_read_dir_block4(ctx->fs, blk, buf, 0, pctx->ino);
 774         ehandler_operation(0);
 775         if (retval)
 776                 return;
 777
 778         dirent = (struct ext2_dir_entry *) buf;
 779         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 780         if (retval)
 781                 return;
 782         if ((ext2fs_dirent_name_len(dirent) != 1) ||
 783             (dirent->name[0] != '.') ||
 784             (dirent->inode != pctx->ino) ||
 785             (rec_len < 12) ||
 786             (rec_len % 4) ||
 787             (rec_len >= ctx->fs->blocksize - 12))
 788                 return;
 789
 790         dirent = (struct ext2_dir_entry *) (buf + rec_len);
 791         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 792         if (retval)
 793                 return;
 794         if ((ext2fs_dirent_name_len(dirent) != 2) ||
 795             (dirent->name[0] != '.') ||
 796             (dirent->name[1] != '.') ||
 797             (rec_len < 12) ||
 798             (rec_len % 4))
 799                 return;
 800
 801 isdir:
 802         if (fix_problem(ctx, PR_1_TREAT_AS_DIRECTORY, pctx)) {
 803                 inode->i_mode = (inode->i_mode & 07777) | LINUX_S_IFDIR;
 804                 e2fsck_write_inode_full(ctx, pctx->ino, inode,
 805                                         EXT2_INODE_SIZE(ctx->fs->super),
 806                                         "check_is_really_dir");
 807         }
 808 }
 809
 810 extern errcode_t e2fsck_setup_icount(e2fsck_t ctx, const char *icount_name,
 811                                      int flags, ext2_icount_t hint,
 812                                      ext2_icount_t *ret)
 813 {
 814         unsigned int            threshold;
 815         unsigned int            save_type;
 816         ext2_ino_t              num_dirs;
 817         errcode_t               retval;
 818         char                    *tdb_dir;
 819         int                     enable;
 820         int                     full_map;
 821
 822         *ret = 0;
 823
 824         profile_get_string(ctx->profile, "scratch_files", "directory", 0, 0,
 825                            &tdb_dir);
 826         profile_get_uint(ctx->profile, "scratch_files",
 827                          "numdirs_threshold", 0, 0, &threshold);
 828         profile_get_boolean(ctx->profile, "scratch_files",
 829                             "icount", 0, 1, &enable);
 830
 831         retval = ext2fs_get_num_dirs(ctx->fs, &num_dirs);
 832         if (retval)
 833                 num_dirs = 1024;        /* Guess */
 834
 835         if (enable && tdb_dir && !access(tdb_dir, W_OK) &&
 836             (!threshold || num_dirs > threshold)) {
 837                 retval = ext2fs_create_icount_tdb(ctx->fs, tdb_dir,
 838                                                   flags, ret);
 839                 if (retval == 0)
 840                         return 0;
 841         }
 842         e2fsck_set_bitmap_type(ctx->fs, EXT2FS_BMAP64_RBTREE, icount_name,
 843                                &save_type);
 844         if (ctx->options & E2F_OPT_ICOUNT_FULLMAP)
 845                 flags |= EXT2_ICOUNT_OPT_FULLMAP;
 846         retval = ext2fs_create_icount2(ctx->fs, flags, 0, hint, ret);
 847         ctx->fs->default_bitmap_type = save_type;
 848         return retval;
 849 }
 850
 851 static errcode_t recheck_bad_inode_checksum(ext2_filsys fs, ext2_ino_t ino,
 852                                             e2fsck_t ctx,
 853                                             struct problem_context *pctx)
 854 {
 855         errcode_t retval;
 856         struct ext2_inode_large inode;
 857
 858         /*
 859          * Reread inode.  If we don't see checksum error, then this inode
 860          * has been fixed elsewhere.
 861          */
 862         ctx->stashed_ino = 0;
 863         retval = ext2fs_read_inode_full(fs, ino, (struct ext2_inode *)&inode,
 864                                         sizeof(inode));
 865         if (retval && retval != EXT2_ET_INODE_CSUM_INVALID)
 866                 return retval;
 867         if (!retval)
 868                 return 0;
 869
 870         /*
 871          * Checksum still doesn't match.  That implies that the inode passes
 872          * all the sanity checks, so maybe the checksum is simply corrupt.
 873          * See if the user will go for fixing that.
 874          */
 875         if (!fix_problem(ctx, PR_1_INODE_ONLY_CSUM_INVALID, pctx))
 876                 return 0;
 877
 878         retval = ext2fs_write_inode_full(fs, ino, (struct ext2_inode *)&inode,
 879                                          sizeof(inode));
 880         return retval;
 881 }
 882
 883 static void reserve_block_for_root_repair(e2fsck_t ctx)
 884 {
 885         blk64_t         blk = 0;
 886         errcode_t       err;
 887         ext2_filsys     fs = ctx->fs;
 888
 889         ctx->root_repair_block = 0;
 890         if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO))
 891                 return;
 892
 893         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 894         if (err)
 895                 return;
 896         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 897         ctx->root_repair_block = blk;
 898 }
 899
 900 static void reserve_block_for_lnf_repair(e2fsck_t ctx)
 901 {
 902         blk64_t         blk = 0;
 903         errcode_t       err;
 904         ext2_filsys     fs = ctx->fs;
 905         static const char name[] = "lost+found";
 906         ext2_ino_t      ino;
 907
 908         ctx->lnf_repair_block = 0;
 909         if (!ext2fs_lookup(fs, EXT2_ROOT_INO, name, sizeof(name)-1, 0, &ino))
 910                 return;
 911
 912         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 913         if (err)
 914                 return;
 915         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 916         ctx->lnf_repair_block = blk;
 917 }
 918
 919 static errcode_t get_inline_data_ea_size(ext2_filsys fs, ext2_ino_t ino,
 920                                          size_t *sz)
 921 {
 922         void *p;
 923         struct ext2_xattr_handle *handle;
 924         errcode_t retval;
 925
 926         retval = ext2fs_xattrs_open(fs, ino, &handle);
 927         if (retval)
 928                 return retval;
 929
 930         retval = ext2fs_xattrs_read(handle);
 931         if (retval)
 932                 goto err;
 933
 934         retval = ext2fs_xattr_get(handle, "system.data", &p, sz);
 935         if (retval)
 936                 goto err;
 937         ext2fs_free_mem(&p);
 938 err:
 939         (void) ext2fs_xattrs_close(&handle);
 940         return retval;
 941 }
 942
 943 static void finish_processing_inode(e2fsck_t ctx, ext2_ino_t ino,
 944                                     struct problem_context *pctx,
 945                                     int failed_csum)
 946 {
 947         if (!failed_csum)
 948                 return;
 949
 950         /*
 951          * If the inode failed the checksum and the user didn't
 952          * clear the inode, test the checksum again -- if it still
 953          * fails, ask the user if the checksum should be corrected.
 954          */
 955         pctx->errcode = recheck_bad_inode_checksum(ctx->fs, ino, ctx, pctx);
 956         if (pctx->errcode)
 957                 ctx->flags |= E2F_FLAG_ABORT;
 958 }
 959 #define FINISH_INODE_LOOP(ctx, ino, pctx, failed_csum) \
 960         do { \
 961                 finish_processing_inode((ctx), (ino), (pctx), (failed_csum)); \
 962                 if ((ctx)->flags & E2F_FLAG_ABORT) \
 963                         return; \
 964         } while (0)
 965
 966 static int could_be_block_map(ext2_filsys fs, struct ext2_inode *inode)
 967 {
 968         __u32 x;
 969         int i;
 970
 971         for (i = 0; i < EXT2_N_BLOCKS; i++) {
 972                 x = inode->i_block[i];
 973 #ifdef WORDS_BIGENDIAN
 974                 x = ext2fs_swab32(x);
 975 #endif
 976                 if (x >= ext2fs_blocks_count(fs->super))
 977                         return 0;
 978         }
 979
 980         return 1;
 981 }
 982
 983 /*
 984  * Figure out what to do with an inode that has both extents and inline data
 985  * inode flags set.  Returns -1 if we decide to erase the inode, 0 otherwise.
 986  */
 987 static int fix_inline_data_extents_file(e2fsck_t ctx,
 988                                         ext2_ino_t ino,
 989                                         struct ext2_inode *inode,
 990                                         int inode_size,
 991                                         struct problem_context *pctx)
 992 {
 993         size_t max_inline_ea_size;
 994         ext2_filsys fs = ctx->fs;
 995         int dirty = 0;
 996
 997         /* Both feature flags not set?  Just run the regular checks */
 998         if (!ext2fs_has_feature_extents(fs->super) &&
 999             !ext2fs_has_feature_inline_data(fs->super))
1000                 return 0;
1001
1002         /* Clear both flags if it's a special file */
1003         if (LINUX_S_ISCHR(inode->i_mode) ||
1004             LINUX_S_ISBLK(inode->i_mode) ||
1005             LINUX_S_ISFIFO(inode->i_mode) ||
1006             LINUX_S_ISSOCK(inode->i_mode)) {
1007                 check_extents_inlinedata(ctx, pctx);
1008                 return 0;
1009         }
1010
1011         /* If it looks like an extent tree, try to clear inlinedata */
1012         if (ext2fs_extent_header_verify(inode->i_block,
1013                                  sizeof(inode->i_block)) == 0 &&
1014             fix_problem(ctx, PR_1_CLEAR_INLINE_DATA_FOR_EXTENT, pctx)) {
1015                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1016                 dirty = 1;
1017                 goto out;
1018         }
1019
1020         /* If it looks short enough to be inline data, try to clear extents */
1021         if (inode_size > EXT2_GOOD_OLD_INODE_SIZE)
1022                 max_inline_ea_size = inode_size -
1023                                      (EXT2_GOOD_OLD_INODE_SIZE +
1024                                       ((struct ext2_inode_large *)inode)->i_extra_isize);
1025         else
1026                 max_inline_ea_size = 0;
1027         if (EXT2_I_SIZE(inode) <
1028             EXT4_MIN_INLINE_DATA_SIZE + max_inline_ea_size &&
1029             fix_problem(ctx, PR_1_CLEAR_EXTENT_FOR_INLINE_DATA, pctx)) {
1030                 inode->i_flags &= ~EXT4_EXTENTS_FL;
1031                 dirty = 1;
1032                 goto out;
1033         }
1034
1035         /*
1036          * Too big for inline data, but no evidence of extent tree -
1037          * maybe it's a block map file?  If the mappings all look valid?
1038          */
1039         if (could_be_block_map(fs, inode) &&
1040             fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_FLAGS, pctx)) {
1041 #ifdef WORDS_BIGENDIAN
1042                 int i;
1043
1044                 for (i = 0; i < EXT2_N_BLOCKS; i++)
1045                         inode->i_block[i] = ext2fs_swab32(inode->i_block[i]);
1046 #endif
1047
1048                 inode->i_flags &= ~(EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL);
1049                 dirty = 1;
1050                 goto out;
1051         }
1052
1053         /* Oh well, just clear the busted inode. */
1054         if (fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_INODE, pctx)) {
1055                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1056                 return -1;
1057         }
1058
1059 out:
1060         if (dirty)
1061                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1062
1063         return 0;
1064 }
1065
1066 static void pass1_readahead(e2fsck_t ctx, dgrp_t *group, ext2_ino_t *next_ino)
1067 {
1068         ext2_ino_t inodes_in_group = 0, inodes_per_block, inodes_per_buffer;
1069         dgrp_t start = *group, grp;
1070         blk64_t blocks_to_read = 0;
1071         errcode_t err = EXT2_ET_INVALID_ARGUMENT;
1072
1073         if (ctx->readahead_kb == 0)
1074                 goto out;
1075
1076         /* Keep iterating groups until we have enough to readahead */
1077         inodes_per_block = EXT2_INODES_PER_BLOCK(ctx->fs->super);
1078         for (grp = start; grp < ctx->fs->group_desc_count; grp++) {
1079                 if (ext2fs_bg_flags_test(ctx->fs, grp, EXT2_BG_INODE_UNINIT))
1080                         continue;
1081                 inodes_in_group = ctx->fs->super->s_inodes_per_group -
1082                                         ext2fs_bg_itable_unused(ctx->fs, grp);
1083                 blocks_to_read += (inodes_in_group + inodes_per_block - 1) /
1084                                         inodes_per_block;
1085                 if (blocks_to_read * ctx->fs->blocksize >
1086                     ctx->readahead_kb * 1024)
1087                         break;
1088         }
1089
1090         err = e2fsck_readahead(ctx->fs, E2FSCK_READA_ITABLE, start,
1091                                grp - start + 1);
1092         if (err == EAGAIN) {
1093                 ctx->readahead_kb /= 2;
1094                 err = 0;
1095         }
1096
1097 out:
1098         if (err) {
1099                 /* Error; disable itable readahead */
1100                 *group = ctx->fs->group_desc_count;
1101                 *next_ino = ctx->fs->super->s_inodes_count;
1102         } else {
1103                 /*
1104                  * Don't do more readahead until we've reached the first inode
1105                  * of the last inode scan buffer block for the last group.
1106                  */
1107                 *group = grp + 1;
1108                 inodes_per_buffer = (ctx->inode_buffer_blocks ?
1109                                      ctx->inode_buffer_blocks :
1110                                      EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS) *
1111                                     ctx->fs->blocksize /
1112                                     EXT2_INODE_SIZE(ctx->fs->super);
1113                 inodes_in_group--;
1114                 *next_ino = inodes_in_group -
1115                             (inodes_in_group % inodes_per_buffer) + 1 +
1116                             (grp * ctx->fs->super->s_inodes_per_group);
1117         }
1118 }
1119
1120 /*
1121  * Check if the passed ino is one of the used superblock quota inodes.
1122  *
1123  * Before the quota inodes were journaled, older superblock quota inodes
1124  * were just regular files in the filesystem and not reserved inodes.  This
1125  * checks if the passed ino is one of the s_*_quota_inum superblock fields,
1126  * which may not always be the same as the EXT4_*_QUOTA_INO fields.
1127  */
1128 static int quota_inum_is_super(struct ext2_super_block *sb, ext2_ino_t ino)
1129 {
1130         enum quota_type qtype;
1131
1132         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1133                 if (*quota_sb_inump(sb, qtype) == ino)
1134                         return 1;
1135
1136         return 0;
1137 }
1138
1139 /*
1140  * Check if the passed ino is one of the reserved quota inodes.
1141  * This checks if the inode number is one of the reserved EXT4_*_QUOTA_INO
1142  * inodes.  These inodes may or may not be in use by the quota feature.
1143  */
1144 static int quota_inum_is_reserved(ext2_filsys fs, ext2_ino_t ino)
1145 {
1146         enum quota_type qtype;
1147
1148         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1149                 if (quota_type2inum(qtype, fs->super) == ino)
1150                         return 1;
1151
1152         return 0;
1153 }
1154
1155 void e2fsck_pass1(e2fsck_t ctx)
1156 {
1157         int     i;
1158         __u64   max_sizes;
1159         ext2_filsys fs = ctx->fs;
1160         ext2_ino_t      ino = 0;
1161         struct ext2_inode *inode = NULL;
1162         ext2_inode_scan scan = NULL;
1163         char            *block_buf = NULL;
1164 #ifdef RESOURCE_TRACK
1165         struct resource_track   rtrack;
1166 #endif
1167         unsigned char   frag, fsize;
1168         struct          problem_context pctx;
1169         struct          scan_callback_struct scan_struct;
1170         struct ext2_super_block *sb = ctx->fs->super;
1171         const char      *old_op;
1172         int             imagic_fs, extent_fs, inlinedata_fs;
1173         int             low_dtime_check = 1;
1174         int             inode_size = EXT2_INODE_SIZE(fs->super);
1175         int             bufsize;
1176         int             failed_csum = 0;
1177         ext2_ino_t      ino_threshold = 0;
1178         dgrp_t          ra_group = 0;
1179         struct ea_quota ea_ibody_quota;
1180
1181         init_resource_track(&rtrack, ctx->fs->io);
1182         clear_problem_context(&pctx);
1183
1184         /* If we can do readahead, figure out how many groups to pull in. */
1185         if (!e2fsck_can_readahead(ctx->fs))
1186                 ctx->readahead_kb = 0;
1187         else if (ctx->readahead_kb == ~0ULL)
1188                 ctx->readahead_kb = e2fsck_guess_readahead(ctx->fs);
1189         pass1_readahead(ctx, &ra_group, &ino_threshold);
1190
1191         if (!(ctx->options & E2F_OPT_PREEN))
1192                 fix_problem(ctx, PR_1_PASS_HEADER, &pctx);
1193
1194         if (ext2fs_has_feature_dir_index(fs->super) &&
1195             !(ctx->options & E2F_OPT_NO)) {
1196                 if (ext2fs_u32_list_create(&ctx->dirs_to_hash, 50))
1197                         ctx->dirs_to_hash = 0;
1198         }
1199
1200 #ifdef MTRACE
1201         mtrace_print("Pass 1");
1202 #endif
1203
1204 #define EXT2_BPP(bits) (1ULL << ((bits) - 2))
1205
1206         for (i = EXT2_MIN_BLOCK_LOG_SIZE; i <= EXT2_MAX_BLOCK_LOG_SIZE; i++) {
1207                 max_sizes = EXT2_NDIR_BLOCKS + EXT2_BPP(i);
1208                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i);
1209                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i) * EXT2_BPP(i);
1210                 max_sizes = (max_sizes * (1UL << i));
1211                 ext2_max_sizes[i - EXT2_MIN_BLOCK_LOG_SIZE] = max_sizes;
1212         }
1213 #undef EXT2_BPP
1214
1215         imagic_fs = ext2fs_has_feature_imagic_inodes(sb);
1216         extent_fs = ext2fs_has_feature_extents(sb);
1217         inlinedata_fs = ext2fs_has_feature_inline_data(sb);
1218
1219         /*
1220          * Allocate bitmaps structures
1221          */
1222         pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("in-use inode map"),
1223                                                     EXT2FS_BMAP64_RBTREE,
1224                                                     "inode_used_map",
1225                                                     &ctx->inode_used_map);
1226         if (pctx.errcode) {
1227                 pctx.num = 1;
1228                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1229                 ctx->flags |= E2F_FLAG_ABORT;
1230                 return;
1231         }
1232         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1233                         _("directory inode map"),
1234                         EXT2FS_BMAP64_AUTODIR,
1235                         "inode_dir_map", &ctx->inode_dir_map);
1236         if (pctx.errcode) {
1237                 pctx.num = 2;
1238                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1239                 ctx->flags |= E2F_FLAG_ABORT;
1240                 return;
1241         }
1242         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1243                         _("regular file inode map"), EXT2FS_BMAP64_RBTREE,
1244                         "inode_reg_map", &ctx->inode_reg_map);
1245         if (pctx.errcode) {
1246                 pctx.num = 6;
1247                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1248                 ctx->flags |= E2F_FLAG_ABORT;
1249                 return;
1250         }
1251         pctx.errcode = e2fsck_allocate_subcluster_bitmap(fs,
1252                         _("in-use block map"), EXT2FS_BMAP64_RBTREE,
1253                         "block_found_map", &ctx->block_found_map);
1254         if (pctx.errcode) {
1255                 pctx.num = 1;
1256                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1257                 ctx->flags |= E2F_FLAG_ABORT;
1258                 return;
1259         }
1260         pctx.errcode = e2fsck_allocate_block_bitmap(fs,
1261                         _("metadata block map"), EXT2FS_BMAP64_RBTREE,
1262                         "block_metadata_map", &ctx->block_metadata_map);
1263         if (pctx.errcode) {
1264                 pctx.num = 1;
1265                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1266                 ctx->flags |= E2F_FLAG_ABORT;
1267                 return;
1268         }
1269         pctx.errcode = e2fsck_setup_icount(ctx, "inode_link_info", 0, NULL,
1270                                            &ctx->inode_link_info);
1271         if (pctx.errcode) {
1272                 fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
1273                 ctx->flags |= E2F_FLAG_ABORT;
1274                 return;
1275         }
1276         bufsize = inode_size;
1277         if (bufsize < sizeof(struct ext2_inode_large))
1278                 bufsize = sizeof(struct ext2_inode_large);
1279         inode = (struct ext2_inode *)
1280                 e2fsck_allocate_memory(ctx, bufsize, "scratch inode");
1281
1282         inodes_to_process = (struct process_inode_block *)
1283                 e2fsck_allocate_memory(ctx,
1284                                        (ctx->process_inode_size *
1285                                         sizeof(struct process_inode_block)),
1286                                        "array of inodes to process");
1287         process_inode_count = 0;
1288
1289         pctx.errcode = ext2fs_init_dblist(fs, 0);
1290         if (pctx.errcode) {
1291                 fix_problem(ctx, PR_1_ALLOCATE_DBCOUNT, &pctx);
1292                 ctx->flags |= E2F_FLAG_ABORT;
1293                 goto endit;
1294         }
1295
1296         /*
1297          * If the last orphan field is set, clear it, since the pass1
1298          * processing will automatically find and clear the orphans.
1299          * In the future, we may want to try using the last_orphan
1300          * linked list ourselves, but for now, we clear it so that the
1301          * ext3 mount code won't get confused.
1302          */
1303         if (!(ctx->options & E2F_OPT_READONLY)) {
1304                 if (fs->super->s_last_orphan) {
1305                         fs->super->s_last_orphan = 0;
1306                         ext2fs_mark_super_dirty(fs);
1307                 }
1308         }
1309
1310         mark_table_blocks(ctx);
1311         pctx.errcode = ext2fs_convert_subcluster_bitmap(fs,
1312                                                 &ctx->block_found_map);
1313         if (pctx.errcode) {
1314                 fix_problem(ctx, PR_1_CONVERT_SUBCLUSTER, &pctx);
1315                 ctx->flags |= E2F_FLAG_ABORT;
1316                 goto endit;
1317         }
1318         block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3,
1319                                                     "block interate buffer");
1320         if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
1321                 e2fsck_use_inode_shortcuts(ctx, 1);
1322         e2fsck_intercept_block_allocations(ctx);
1323         old_op = ehandler_operation(_("opening inode scan"));
1324         pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks,
1325                                               &scan);
1326         ehandler_operation(old_op);
1327         if (pctx.errcode) {
1328                 fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1329                 ctx->flags |= E2F_FLAG_ABORT;
1330                 goto endit;
1331         }
1332         ext2fs_inode_scan_flags(scan, EXT2_SF_SKIP_MISSING_ITABLE |
1333                                       EXT2_SF_WARN_GARBAGE_INODES, 0);
1334         ctx->stashed_inode = inode;
1335         scan_struct.ctx = ctx;
1336         scan_struct.block_buf = block_buf;
1337         ext2fs_set_inode_callback(scan, scan_callback, &scan_struct);
1338         if (ctx->progress && ((ctx->progress)(ctx, 1, 0,
1339                                               ctx->fs->group_desc_count)))
1340                 goto endit;
1341         if ((fs->super->s_wtime < fs->super->s_inodes_count) ||
1342             (fs->super->s_mtime < fs->super->s_inodes_count) ||
1343             (fs->super->s_mkfs_time &&
1344              fs->super->s_mkfs_time < fs->super->s_inodes_count))
1345                 low_dtime_check = 0;
1346
1347         if (ext2fs_has_feature_mmp(fs->super) &&
1348             fs->super->s_mmp_block > fs->super->s_first_data_block &&
1349             fs->super->s_mmp_block < ext2fs_blocks_count(fs->super))
1350                 ext2fs_mark_block_bitmap2(ctx->block_found_map,
1351                                           fs->super->s_mmp_block);
1352
1353         /* Set up ctx->lost_and_found if possible */
1354         (void) e2fsck_get_lost_and_found(ctx, 0);
1355
1356         while (1) {
1357                 if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
1358                         if (e2fsck_mmp_update(fs))
1359                                 fatal_error(ctx, 0);
1360                 }
1361                 old_op = ehandler_operation(_("getting next inode from scan"));
1362                 pctx.errcode = ext2fs_get_next_inode_full(scan, &ino,
1363                                                           inode, inode_size);
1364                 if (ino > ino_threshold)
1365                         pass1_readahead(ctx, &ra_group, &ino_threshold);
1366                 ehandler_operation(old_op);
1367                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1368                         goto endit;
1369                 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) {
1370                         /*
1371                          * If badblocks says badblocks is bad, offer to clear
1372                          * the list, update the in-core bb list, and restart
1373                          * the inode scan.
1374                          */
1375                         if (ino == EXT2_BAD_INO &&
1376                             fix_problem(ctx, PR_1_BADBLOCKS_IN_BADBLOCKS,
1377                                         &pctx)) {
1378                                 errcode_t err;
1379
1380                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1381                                 ext2fs_badblocks_list_free(ctx->fs->badblocks);
1382                                 ctx->fs->badblocks = NULL;
1383                                 err = ext2fs_read_bb_inode(ctx->fs,
1384                                                         &ctx->fs->badblocks);
1385                                 if (err) {
1386                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1387                                                     &pctx);
1388                                         ctx->flags |= E2F_FLAG_ABORT;
1389                                         goto endit;
1390                                 }
1391                                 err = ext2fs_inode_scan_goto_blockgroup(scan,
1392                                                                         0);
1393                                 if (err) {
1394                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1395                                                     &pctx);
1396                                         ctx->flags |= E2F_FLAG_ABORT;
1397                                         goto endit;
1398                                 }
1399                                 continue;
1400                         }
1401                         if (!ctx->inode_bb_map)
1402                                 alloc_bb_map(ctx);
1403                         ext2fs_mark_inode_bitmap2(ctx->inode_bb_map, ino);
1404                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1405                         continue;
1406                 }
1407                 if (pctx.errcode &&
1408                     pctx.errcode != EXT2_ET_INODE_CSUM_INVALID &&
1409                     pctx.errcode != EXT2_ET_INODE_IS_GARBAGE) {
1410                         fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1411                         ctx->flags |= E2F_FLAG_ABORT;
1412                         goto endit;
1413                 }
1414                 if (!ino)
1415                         break;
1416                 pctx.ino = ino;
1417                 pctx.inode = inode;
1418                 ctx->stashed_ino = ino;
1419
1420                 /* Clear trashed inode? */
1421                 if (pctx.errcode == EXT2_ET_INODE_IS_GARBAGE &&
1422                     inode->i_links_count > 0 &&
1423                     fix_problem(ctx, PR_1_INODE_IS_GARBAGE, &pctx)) {
1424                         pctx.errcode = 0;
1425                         e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1426                 }
1427                 failed_csum = pctx.errcode != 0;
1428
1429                 /*
1430                  * Check for inodes who might have been part of the
1431                  * orphaned list linked list.  They should have gotten
1432                  * dealt with by now, unless the list had somehow been
1433                  * corrupted.
1434                  *
1435                  * FIXME: In the future, inodes which are still in use
1436                  * (and which are therefore) pending truncation should
1437                  * be handled specially.  Right now we just clear the
1438                  * dtime field, and the normal e2fsck handling of
1439                  * inodes where i_size and the inode blocks are
1440                  * inconsistent is to fix i_size, instead of releasing
1441                  * the extra blocks.  This won't catch the inodes that
1442                  * was at the end of the orphan list, but it's better
1443                  * than nothing.  The right answer is that there
1444                  * shouldn't be any bugs in the orphan list handling.  :-)
1445                  */
1446                 if (inode->i_dtime && low_dtime_check &&
1447                     inode->i_dtime < ctx->fs->super->s_inodes_count) {
1448                         if (fix_problem(ctx, PR_1_LOW_DTIME, &pctx)) {
1449                                 inode->i_dtime = inode->i_links_count ?
1450                                         0 : ctx->now;
1451                                 e2fsck_write_inode(ctx, ino, inode,
1452                                                    "pass1");
1453                                 failed_csum = 0;
1454                         }
1455                 }
1456
1457                 if (inode->i_links_count) {
1458                         pctx.errcode = ext2fs_icount_store(ctx->inode_link_info,
1459                                            ino, inode->i_links_count);
1460                         if (pctx.errcode) {
1461                                 pctx.num = inode->i_links_count;
1462                                 fix_problem(ctx, PR_1_ICOUNT_STORE, &pctx);
1463                                 ctx->flags |= E2F_FLAG_ABORT;
1464                                 goto endit;
1465                         }
1466                 } else if ((ino >= EXT2_FIRST_INODE(fs->super)) &&
1467                            !quota_inum_is_reserved(fs, ino)) {
1468                         if (!inode->i_dtime && inode->i_mode) {
1469                                 if (fix_problem(ctx,
1470                                             PR_1_ZERO_DTIME, &pctx)) {
1471                                         inode->i_dtime = ctx->now;
1472                                         e2fsck_write_inode(ctx, ino, inode,
1473                                                            "pass1");
1474                                         failed_csum = 0;
1475                                 }
1476                         }
1477                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1478                         continue;
1479                 }
1480
1481                 /* Conflicting inlinedata/extents inode flags? */
1482                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
1483                     (inode->i_flags & EXT4_EXTENTS_FL)) {
1484                         int res = fix_inline_data_extents_file(ctx, ino, inode,
1485                                                                inode_size,
1486                                                                &pctx);
1487                         if (res < 0) {
1488                                 /* skip FINISH_INODE_LOOP */
1489                                 continue;
1490                         }
1491                 }
1492
1493                 /* Test for incorrect inline_data flags settings. */
1494                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && !inlinedata_fs &&
1495                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1496                         size_t size = 0;
1497
1498                         pctx.errcode = ext2fs_inline_data_size(fs, ino, &size);
1499                         if (!pctx.errcode && size &&
1500                             fix_problem(ctx, PR_1_INLINE_DATA_FEATURE, &pctx)) {
1501                                 ext2fs_set_feature_inline_data(sb);
1502                                 ext2fs_mark_super_dirty(fs);
1503                                 inlinedata_fs = 1;
1504                         } else if (fix_problem(ctx, PR_1_INLINE_DATA_SET, &pctx)) {
1505                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1506                                 /* skip FINISH_INODE_LOOP */
1507                                 continue;
1508                         }
1509                 }
1510
1511                 /* Test for inline data flag but no attr */
1512                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && inlinedata_fs &&
1513                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1514                         size_t size = 0;
1515                         errcode_t err;
1516                         int flags;
1517
1518                         flags = fs->flags;
1519                         if (failed_csum)
1520                                 fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1521                         err = get_inline_data_ea_size(fs, ino, &size);
1522                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1523                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1524
1525                         switch (err) {
1526                         case 0:
1527                                 /* Everything is awesome... */
1528                                 break;
1529                         case EXT2_ET_BAD_EA_BLOCK_NUM:
1530                         case EXT2_ET_BAD_EA_HASH:
1531                         case EXT2_ET_BAD_EA_HEADER:
1532                         case EXT2_ET_EA_BAD_NAME_LEN:
1533                         case EXT2_ET_EA_BAD_VALUE_SIZE:
1534                         case EXT2_ET_EA_KEY_NOT_FOUND:
1535                         case EXT2_ET_EA_NO_SPACE:
1536                         case EXT2_ET_MISSING_EA_FEATURE:
1537                         case EXT2_ET_INLINE_DATA_CANT_ITERATE:
1538                         case EXT2_ET_INLINE_DATA_NO_BLOCK:
1539                         case EXT2_ET_INLINE_DATA_NO_SPACE:
1540                         case EXT2_ET_NO_INLINE_DATA:
1541                         case EXT2_ET_EXT_ATTR_CSUM_INVALID:
1542                         case EXT2_ET_EA_BAD_VALUE_OFFSET:
1543                                 /* broken EA or no system.data EA; truncate */
1544                                 if (fix_problem(ctx, PR_1_INLINE_DATA_NO_ATTR,
1545                                                 &pctx)) {
1546                                         err = ext2fs_inode_size_set(fs, inode, 0);
1547                                         if (err) {
1548                                                 pctx.errcode = err;
1549                                                 ctx->flags |= E2F_FLAG_ABORT;
1550                                                 goto endit;
1551                                         }
1552                                         inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1553                                         memset(&inode->i_block, 0,
1554                                                sizeof(inode->i_block));
1555                                         e2fsck_write_inode(ctx, ino, inode,
1556                                                            "pass1");
1557                                         failed_csum = 0;
1558                                 }
1559                                 break;
1560                         default:
1561                                 /* Some other kind of non-xattr error? */
1562                                 pctx.errcode = err;
1563                                 ctx->flags |= E2F_FLAG_ABORT;
1564                                 goto endit;
1565                         }
1566                 }
1567
1568                 /*
1569                  * Test for incorrect extent flag settings.
1570                  *
1571                  * On big-endian machines we must be careful:
1572                  * When the inode is read, the i_block array is not swapped
1573                  * if the extent flag is set.  Therefore if we are testing
1574                  * for or fixing a wrongly-set flag, we must potentially
1575                  * (un)swap before testing, or after fixing.
1576                  */
1577
1578                 /*
1579                  * In this case the extents flag was set when read, so
1580                  * extent_header_verify is ok.  If the inode is cleared,
1581                  * no need to swap... so no extra swapping here.
1582                  */
1583                 if ((inode->i_flags & EXT4_EXTENTS_FL) && !extent_fs &&
1584                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1585                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO))) {
1586                         if ((ext2fs_extent_header_verify(inode->i_block,
1587                                                  sizeof(inode->i_block)) == 0) &&
1588                             fix_problem(ctx, PR_1_EXTENT_FEATURE, &pctx)) {
1589                                 ext2fs_set_feature_extents(sb);
1590                                 ext2fs_mark_super_dirty(fs);
1591                                 extent_fs = 1;
1592                         } else if (fix_problem(ctx, PR_1_EXTENTS_SET, &pctx)) {
1593                         clear_inode:
1594                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1595                                 if (ino == EXT2_BAD_INO)
1596                                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map,
1597                                                                  ino);
1598                                 /* skip FINISH_INODE_LOOP */
1599                                 continue;
1600                         }
1601                 }
1602
1603                 /*
1604                  * For big-endian machines:
1605                  * If the inode didn't have the extents flag set when it
1606                  * was read, then the i_blocks array was swapped.  To test
1607                  * as an extents header, we must swap it back first.
1608                  * IF we then set the extents flag, the entire i_block
1609                  * array must be un/re-swapped to make it proper extents data.
1610                  */
1611                 if (extent_fs && !(inode->i_flags & EXT4_EXTENTS_FL) &&
1612                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1613                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO)) &&
1614                     (LINUX_S_ISREG(inode->i_mode) ||
1615                      LINUX_S_ISDIR(inode->i_mode))) {
1616                         void *ehp;
1617 #ifdef WORDS_BIGENDIAN
1618                         __u32 tmp_block[EXT2_N_BLOCKS];
1619
1620                         for (i = 0; i < EXT2_N_BLOCKS; i++)
1621                                 tmp_block[i] = ext2fs_swab32(inode->i_block[i]);
1622                         ehp = tmp_block;
1623 #else
1624                         ehp = inode->i_block;
1625 #endif
1626                         if ((ext2fs_extent_header_verify(ehp,
1627                                          sizeof(inode->i_block)) == 0) &&
1628                             (fix_problem(ctx, PR_1_UNSET_EXTENT_FL, &pctx))) {
1629                                 inode->i_flags |= EXT4_EXTENTS_FL;
1630 #ifdef WORDS_BIGENDIAN
1631                                 memcpy(inode->i_block, tmp_block,
1632                                        sizeof(inode->i_block));
1633 #endif
1634                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1635                                 failed_csum = 0;
1636                         }
1637                 }
1638
1639                 if (ino == EXT2_BAD_INO) {
1640                         struct process_block_struct pb;
1641
1642                         if ((failed_csum || inode->i_mode || inode->i_uid ||
1643                              inode->i_gid || inode->i_links_count ||
1644                              (inode->i_flags & EXT4_INLINE_DATA_FL) ||
1645                              inode->i_file_acl) &&
1646                             fix_problem(ctx, PR_1_INVALID_BAD_INODE, &pctx)) {
1647                                 memset(inode, 0, sizeof(struct ext2_inode));
1648                                 e2fsck_write_inode(ctx, ino, inode,
1649                                                    "clear bad inode");
1650                                 failed_csum = 0;
1651                         }
1652
1653                         pctx.errcode = ext2fs_copy_bitmap(ctx->block_found_map,
1654                                                           &pb.fs_meta_blocks);
1655                         if (pctx.errcode) {
1656                                 pctx.num = 4;
1657                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1658                                 ctx->flags |= E2F_FLAG_ABORT;
1659                                 goto endit;
1660                         }
1661                         pb.ino = EXT2_BAD_INO;
1662                         pb.num_blocks = pb.last_block = 0;
1663                         pb.last_db_block = -1;
1664                         pb.num_illegal_blocks = 0;
1665                         pb.suppress = 0; pb.clear = 0; pb.is_dir = 0;
1666                         pb.is_reg = 0; pb.fragmented = 0; pb.bbcheck = 0;
1667                         pb.inode = inode;
1668                         pb.pctx = &pctx;
1669                         pb.ctx = ctx;
1670                         pctx.errcode = ext2fs_block_iterate3(fs, ino, 0,
1671                                      block_buf, process_bad_block, &pb);
1672                         ext2fs_free_block_bitmap(pb.fs_meta_blocks);
1673                         if (pctx.errcode) {
1674                                 fix_problem(ctx, PR_1_BLOCK_ITERATE, &pctx);
1675                                 ctx->flags |= E2F_FLAG_ABORT;
1676                                 goto endit;
1677                         }
1678                         if (pb.bbcheck)
1679                                 if (!fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK_PROMPT, &pctx)) {
1680                                 ctx->flags |= E2F_FLAG_ABORT;
1681                                 goto endit;
1682                         }
1683                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1684                         clear_problem_context(&pctx);
1685                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1686                         continue;
1687                 } else if (ino == EXT2_ROOT_INO) {
1688                         /*
1689                          * Make sure the root inode is a directory; if
1690                          * not, offer to clear it.  It will be
1691                          * regenerated in pass #3.
1692                          */
1693                         if (!LINUX_S_ISDIR(inode->i_mode)) {
1694                                 if (fix_problem(ctx, PR_1_ROOT_NO_DIR, &pctx))
1695                                         goto clear_inode;
1696                         }
1697                         /*
1698                          * If dtime is set, offer to clear it.  mke2fs
1699                          * version 0.2b created filesystems with the
1700                          * dtime field set for the root and lost+found
1701                          * directories.  We won't worry about
1702                          * /lost+found, since that can be regenerated
1703                          * easily.  But we will fix the root directory
1704                          * as a special case.
1705                          */
1706                         if (inode->i_dtime && inode->i_links_count) {
1707                                 if (fix_problem(ctx, PR_1_ROOT_DTIME, &pctx)) {
1708                                         inode->i_dtime = 0;
1709                                         e2fsck_write_inode(ctx, ino, inode,
1710                                                            "pass1");
1711                                         failed_csum = 0;
1712                                 }
1713                         }
1714                 } else if (ino == EXT2_JOURNAL_INO) {
1715                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1716                         if (fs->super->s_journal_inum == EXT2_JOURNAL_INO) {
1717                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1718                                     fix_problem(ctx, PR_1_JOURNAL_BAD_MODE,
1719                                                 &pctx)) {
1720                                         inode->i_mode = LINUX_S_IFREG;
1721                                         e2fsck_write_inode(ctx, ino, inode,
1722                                                            "pass1");
1723                                         failed_csum = 0;
1724                                 }
1725                                 check_blocks(ctx, &pctx, block_buf, NULL);
1726                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1727                                 continue;
1728                         }
1729                         if ((inode->i_links_count ||
1730                              inode->i_blocks || inode->i_block[0]) &&
1731                             fix_problem(ctx, PR_1_JOURNAL_INODE_NOT_CLEAR,
1732                                         &pctx)) {
1733                                 memset(inode, 0, inode_size);
1734                                 ext2fs_icount_store(ctx->inode_link_info,
1735                                                     ino, 0);
1736                                 e2fsck_write_inode_full(ctx, ino, inode,
1737                                                         inode_size, "pass1");
1738                                 failed_csum = 0;
1739                         }
1740                 } else if (quota_inum_is_reserved(fs, ino)) {
1741                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1742                         if (ext2fs_has_feature_quota(fs->super) &&
1743                             quota_inum_is_super(fs->super, ino)) {
1744                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1745                                     fix_problem(ctx, PR_1_QUOTA_BAD_MODE,
1746                                                         &pctx)) {
1747                                         inode->i_mode = LINUX_S_IFREG;
1748                                         e2fsck_write_inode(ctx, ino, inode,
1749                                                         "pass1");
1750                                         failed_csum = 0;
1751                                 }
1752                                 check_blocks(ctx, &pctx, block_buf, NULL);
1753                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1754                                 continue;
1755                         }
1756                         if ((inode->i_links_count ||
1757                              inode->i_blocks || inode->i_block[0]) &&
1758                             fix_problem(ctx, PR_1_QUOTA_INODE_NOT_CLEAR,
1759                                         &pctx)) {
1760                                 memset(inode, 0, inode_size);
1761                                 ext2fs_icount_store(ctx->inode_link_info,
1762                                                     ino, 0);
1763                                 e2fsck_write_inode_full(ctx, ino, inode,
1764                                                         inode_size, "pass1");
1765                                 failed_csum = 0;
1766                         }
1767                 } else if (ino < EXT2_FIRST_INODE(fs->super)) {
1768                         problem_t problem = 0;
1769
1770                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1771                         if (ino == EXT2_BOOT_LOADER_INO) {
1772                                 if (LINUX_S_ISDIR(inode->i_mode))
1773                                         problem = PR_1_RESERVED_BAD_MODE;
1774                         } else if (ino == EXT2_RESIZE_INO) {
1775                                 if (inode->i_mode &&
1776                                     !LINUX_S_ISREG(inode->i_mode))
1777                                         problem = PR_1_RESERVED_BAD_MODE;
1778                         } else {
1779                                 if (inode->i_mode != 0)
1780                                         problem = PR_1_RESERVED_BAD_MODE;
1781                         }
1782                         if (problem) {
1783                                 if (fix_problem(ctx, problem, &pctx)) {
1784                                         inode->i_mode = 0;
1785                                         e2fsck_write_inode(ctx, ino, inode,
1786                                                            "pass1");
1787                                         failed_csum = 0;
1788                                 }
1789                         }
1790                         check_blocks(ctx, &pctx, block_buf, NULL);
1791                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1792                         continue;
1793                 }
1794
1795                 if (!inode->i_links_count) {
1796                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1797                         continue;
1798                 }
1799                 /*
1800                  * n.b.  0.3c ext2fs code didn't clear i_links_count for
1801                  * deleted files.  Oops.
1802                  *
1803                  * Since all new ext2 implementations get this right,
1804                  * we now assume that the case of non-zero
1805                  * i_links_count and non-zero dtime means that we
1806                  * should keep the file, not delete it.
1807                  *
1808                  */
1809                 if (inode->i_dtime) {
1810                         if (fix_problem(ctx, PR_1_SET_DTIME, &pctx)) {
1811                                 inode->i_dtime = 0;
1812                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1813                                 failed_csum = 0;
1814                         }
1815                 }
1816
1817                 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1818                 switch (fs->super->s_creator_os) {
1819                     case EXT2_OS_HURD:
1820                         frag = inode->osd2.hurd2.h_i_frag;
1821                         fsize = inode->osd2.hurd2.h_i_fsize;
1822                         break;
1823                     default:
1824                         frag = fsize = 0;
1825                 }
1826
1827                 if (inode->i_faddr || frag || fsize ||
1828                     (!ext2fs_has_feature_largedir(fs->super) &&
1829                     (LINUX_S_ISDIR(inode->i_mode) && inode->i_size_high)))
1830                         mark_inode_bad(ctx, ino);
1831                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1832                     !ext2fs_has_feature_64bit(fs->super) &&
1833                     inode->osd2.linux2.l_i_file_acl_high != 0)
1834                         mark_inode_bad(ctx, ino);
1835                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1836                     !ext2fs_has_feature_huge_file(fs->super) &&
1837                     (inode->osd2.linux2.l_i_blocks_hi != 0))
1838                         mark_inode_bad(ctx, ino);
1839                 if (inode->i_flags & EXT2_IMAGIC_FL) {
1840                         if (imagic_fs) {
1841                                 if (!ctx->inode_imagic_map)
1842                                         alloc_imagic_map(ctx);
1843                                 ext2fs_mark_inode_bitmap2(ctx->inode_imagic_map,
1844                                                          ino);
1845                         } else {
1846                                 if (fix_problem(ctx, PR_1_SET_IMAGIC, &pctx)) {
1847                                         inode->i_flags &= ~EXT2_IMAGIC_FL;
1848                                         e2fsck_write_inode(ctx, ino,
1849                                                            inode, "pass1");
1850                                         failed_csum = 0;
1851                                 }
1852                         }
1853                 }
1854
1855                 check_inode_extra_space(ctx, &pctx, &ea_ibody_quota);
1856                 check_is_really_dir(ctx, &pctx, block_buf);
1857
1858                 /*
1859                  * ext2fs_inode_has_valid_blocks2 does not actually look
1860                  * at i_block[] values, so not endian-sensitive here.
1861                  */
1862                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL) &&
1863                     LINUX_S_ISLNK(inode->i_mode) &&
1864                     !ext2fs_inode_has_valid_blocks2(fs, inode) &&
1865                     fix_problem(ctx, PR_1_FAST_SYMLINK_EXTENT_FL, &pctx)) {
1866                         inode->i_flags &= ~EXT4_EXTENTS_FL;
1867                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1868                         failed_csum = 0;
1869                 }
1870
1871                 if (LINUX_S_ISDIR(inode->i_mode)) {
1872                         ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
1873                         e2fsck_add_dir_info(ctx, ino, 0);
1874                         ctx->fs_directory_count++;
1875                         if (inode->i_flags & EXT4_ENCRYPT_FL)
1876                                 add_encrypted_dir(ctx, ino);
1877                 } else if (LINUX_S_ISREG (inode->i_mode)) {
1878                         ext2fs_mark_inode_bitmap2(ctx->inode_reg_map, ino);
1879                         ctx->fs_regular_count++;
1880                 } else if (LINUX_S_ISCHR (inode->i_mode) &&
1881                            e2fsck_pass1_check_device_inode(fs, inode)) {
1882                         check_extents_inlinedata(ctx, &pctx);
1883                         check_immutable(ctx, &pctx);
1884                         check_size(ctx, &pctx);
1885                         ctx->fs_chardev_count++;
1886                 } else if (LINUX_S_ISBLK (inode->i_mode) &&
1887                            e2fsck_pass1_check_device_inode(fs, inode)) {
1888                         check_extents_inlinedata(ctx, &pctx);
1889                         check_immutable(ctx, &pctx);
1890                         check_size(ctx, &pctx);
1891                         ctx->fs_blockdev_count++;
1892                 } else if (LINUX_S_ISLNK (inode->i_mode) &&
1893                            e2fsck_pass1_check_symlink(fs, ino, inode,
1894                                                       block_buf)) {
1895                         check_immutable(ctx, &pctx);
1896                         ctx->fs_symlinks_count++;
1897                         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
1898                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1899                                 continue;
1900                         } else if (ext2fs_is_fast_symlink(inode)) {
1901                                 ctx->fs_fast_symlinks_count++;
1902                                 check_blocks(ctx, &pctx, block_buf,
1903                                              &ea_ibody_quota);
1904                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1905                                 continue;
1906                         }
1907                 }
1908                 else if (LINUX_S_ISFIFO (inode->i_mode) &&
1909                          e2fsck_pass1_check_device_inode(fs, inode)) {
1910                         check_extents_inlinedata(ctx, &pctx);
1911                         check_immutable(ctx, &pctx);
1912                         check_size(ctx, &pctx);
1913                         ctx->fs_fifo_count++;
1914                 } else if ((LINUX_S_ISSOCK (inode->i_mode)) &&
1915                            e2fsck_pass1_check_device_inode(fs, inode)) {
1916                         check_extents_inlinedata(ctx, &pctx);
1917                         check_immutable(ctx, &pctx);
1918                         check_size(ctx, &pctx);
1919                         ctx->fs_sockets_count++;
1920                 } else
1921                         mark_inode_bad(ctx, ino);
1922                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1923                     !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
1924                         if (inode->i_block[EXT2_IND_BLOCK])
1925                                 ctx->fs_ind_count++;
1926                         if (inode->i_block[EXT2_DIND_BLOCK])
1927                                 ctx->fs_dind_count++;
1928                         if (inode->i_block[EXT2_TIND_BLOCK])
1929                                 ctx->fs_tind_count++;
1930                 }
1931                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1932                     !(inode->i_flags & EXT4_INLINE_DATA_FL) &&
1933                     (inode->i_block[EXT2_IND_BLOCK] ||
1934                      inode->i_block[EXT2_DIND_BLOCK] ||
1935                      inode->i_block[EXT2_TIND_BLOCK] ||
1936                      ext2fs_file_acl_block(fs, inode))) {
1937                         struct process_inode_block *itp;
1938
1939                         itp = &inodes_to_process[process_inode_count];
1940                         itp->ino = ino;
1941                         itp->ea_ibody_quota = ea_ibody_quota;
1942                         if (inode_size < sizeof(struct ext2_inode_large))
1943                                 memcpy(&itp->inode, inode, inode_size);
1944                         else
1945                                 memcpy(&itp->inode, inode, sizeof(itp->inode));
1946                         process_inode_count++;
1947                 } else
1948                         check_blocks(ctx, &pctx, block_buf, &ea_ibody_quota);
1949
1950                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1951
1952                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1953                         goto endit;
1954
1955                 if (process_inode_count >= ctx->process_inode_size) {
1956                         process_inodes(ctx, block_buf);
1957
1958                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1959                                 goto endit;
1960                 }
1961         }
1962         process_inodes(ctx, block_buf);
1963         ext2fs_close_inode_scan(scan);
1964         scan = NULL;
1965
1966         reserve_block_for_root_repair(ctx);
1967         reserve_block_for_lnf_repair(ctx);
1968
1969         /*
1970          * If any extended attribute blocks' reference counts need to
1971          * be adjusted, either up (ctx->refcount_extra), or down
1972          * (ctx->refcount), then fix them.
1973          */
1974         if (ctx->refcount) {
1975                 adjust_extattr_refcount(ctx, ctx->refcount, block_buf, -1);
1976                 ea_refcount_free(ctx->refcount);
1977                 ctx->refcount = 0;
1978         }
1979         if (ctx->refcount_extra) {
1980                 adjust_extattr_refcount(ctx, ctx->refcount_extra,
1981                                         block_buf, +1);
1982                 ea_refcount_free(ctx->refcount_extra);
1983                 ctx->refcount_extra = 0;
1984         }
1985
1986         if (ctx->ea_block_quota_blocks) {
1987                 ea_refcount_free(ctx->ea_block_quota_blocks);
1988                 ctx->ea_block_quota_blocks = 0;
1989         }
1990
1991         if (ctx->ea_block_quota_inodes) {
1992                 ea_refcount_free(ctx->ea_block_quota_inodes);
1993                 ctx->ea_block_quota_inodes = 0;
1994         }
1995
1996         if (ctx->invalid_bitmaps)
1997                 handle_fs_bad_blocks(ctx);
1998
1999         /* We don't need the block_ea_map any more */
2000         if (ctx->block_ea_map) {
2001                 ext2fs_free_block_bitmap(ctx->block_ea_map);
2002                 ctx->block_ea_map = 0;
2003         }
2004
2005         if (ctx->flags & E2F_FLAG_RESIZE_INODE) {
2006                 clear_problem_context(&pctx);
2007                 pctx.errcode = ext2fs_create_resize_inode(fs);
2008                 if (pctx.errcode) {
2009                         if (!fix_problem(ctx, PR_1_RESIZE_INODE_CREATE,
2010                                          &pctx)) {
2011                                 ctx->flags |= E2F_FLAG_ABORT;
2012                                 goto endit;
2013                         }
2014                         pctx.errcode = 0;
2015                 }
2016                 if (!pctx.errcode) {
2017                         e2fsck_read_inode(ctx, EXT2_RESIZE_INO, inode,
2018                                           "recreate inode");
2019                         inode->i_mtime = ctx->now;
2020                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, inode,
2021                                            "recreate inode");
2022                 }
2023                 ctx->flags &= ~E2F_FLAG_RESIZE_INODE;
2024         }
2025
2026         if (ctx->flags & E2F_FLAG_RESTART) {
2027                 /*
2028                  * Only the master copy of the superblock and block
2029                  * group descriptors are going to be written during a
2030                  * restart, so set the superblock to be used to be the
2031                  * master superblock.
2032                  */
2033                 ctx->use_superblock = 0;
2034                 unwind_pass1(fs);
2035                 goto endit;
2036         }
2037
2038         if (ctx->block_dup_map) {
2039                 if (ctx->options & E2F_OPT_PREEN) {
2040                         clear_problem_context(&pctx);
2041                         fix_problem(ctx, PR_1_DUP_BLOCKS_PREENSTOP, &pctx);
2042                 }
2043                 e2fsck_pass1_dupblocks(ctx, block_buf);
2044         }
2045         ctx->flags |= E2F_FLAG_ALLOC_OK;
2046         ext2fs_free_mem(&inodes_to_process);
2047 endit:
2048         e2fsck_use_inode_shortcuts(ctx, 0);
2049
2050         if (scan)
2051                 ext2fs_close_inode_scan(scan);
2052         if (block_buf)
2053                 ext2fs_free_mem(&block_buf);
2054         if (inode)
2055                 ext2fs_free_mem(&inode);
2056
2057         /*
2058          * The l+f inode may have been cleared, so zap it now and
2059          * later passes will recalculate it if necessary
2060          */
2061         ctx->lost_and_found = 0;
2062
2063         if ((ctx->flags & E2F_FLAG_SIGNAL_MASK) == 0)
2064                 print_resource_track(ctx, _("Pass 1"), &rtrack, ctx->fs->io);
2065         else
2066                 ctx->invalid_bitmaps++;
2067 }
2068 #undef FINISH_INODE_LOOP
2069
2070 /*
2071  * When the inode_scan routines call this callback at the end of the
2072  * glock group, call process_inodes.
2073  */
2074 static errcode_t scan_callback(ext2_filsys fs,
2075                                ext2_inode_scan scan EXT2FS_ATTR((unused)),
2076                                dgrp_t group, void * priv_data)
2077 {
2078         struct scan_callback_struct *scan_struct;
2079         e2fsck_t ctx;
2080
2081         scan_struct = (struct scan_callback_struct *) priv_data;
2082         ctx = scan_struct->ctx;
2083
2084         process_inodes((e2fsck_t) fs->priv_data, scan_struct->block_buf);
2085
2086         if (ctx->progress)
2087                 if ((ctx->progress)(ctx, 1, group+1,
2088                                     ctx->fs->group_desc_count))
2089                         return EXT2_ET_CANCEL_REQUESTED;
2090
2091         return 0;
2092 }
2093
2094 /*
2095  * Process the inodes in the "inodes to process" list.
2096  */
2097 static void process_inodes(e2fsck_t ctx, char *block_buf)
2098 {
2099         int                     i;
2100         struct ext2_inode       *old_stashed_inode;
2101         ext2_ino_t              old_stashed_ino;
2102         const char              *old_operation;
2103         char                    buf[80];
2104         struct problem_context  pctx;
2105
2106 #if 0
2107         printf("begin process_inodes: ");
2108 #endif
2109         if (process_inode_count == 0)
2110                 return;
2111         old_operation = ehandler_operation(0);
2112         old_stashed_inode = ctx->stashed_inode;
2113         old_stashed_ino = ctx->stashed_ino;
2114         qsort(inodes_to_process, process_inode_count,
2115                       sizeof(struct process_inode_block), process_inode_cmp);
2116         clear_problem_context(&pctx);
2117         for (i=0; i < process_inode_count; i++) {
2118                 pctx.inode = ctx->stashed_inode =
2119                         (struct ext2_inode *) &inodes_to_process[i].inode;
2120                 pctx.ino = ctx->stashed_ino = inodes_to_process[i].ino;
2121
2122 #if 0
2123                 printf("%u ", pctx.ino);
2124 #endif
2125                 sprintf(buf, _("reading indirect blocks of inode %u"),
2126                         pctx.ino);
2127                 ehandler_operation(buf);
2128                 check_blocks(ctx, &pctx, block_buf,
2129                              &inodes_to_process[i].ea_ibody_quota);
2130                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
2131                         break;
2132         }
2133         ctx->stashed_inode = old_stashed_inode;
2134         ctx->stashed_ino = old_stashed_ino;
2135         process_inode_count = 0;
2136 #if 0
2137         printf("end process inodes\n");
2138 #endif
2139         ehandler_operation(old_operation);
2140 }
2141
2142 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b)
2143 {
2144         const struct process_inode_block *ib_a =
2145                 (const struct process_inode_block *) a;
2146         const struct process_inode_block *ib_b =
2147                 (const struct process_inode_block *) b;
2148         int     ret;
2149
2150         ret = (ib_a->inode.i_block[EXT2_IND_BLOCK] -
2151                ib_b->inode.i_block[EXT2_IND_BLOCK]);
2152         if (ret == 0)
2153                 /*
2154                  * We only call process_inodes() for non-extent
2155                  * inodes, so it's OK to pass NULL to
2156                  * ext2fs_file_acl_block() here.
2157                  */
2158                 ret = ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_a->inode)) -
2159                         ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_b->inode));
2160         if (ret == 0)
2161                 ret = ib_a->ino - ib_b->ino;
2162         return ret;
2163 }
2164
2165 /*
2166  * Mark an inode as being bad in some what
2167  */
2168 static void mark_inode_bad(e2fsck_t ctx, ino_t ino)
2169 {
2170         struct          problem_context pctx;
2171
2172         if (!ctx->inode_bad_map) {
2173                 clear_problem_context(&pctx);
2174
2175                 pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2176                                 _("bad inode map"), EXT2FS_BMAP64_RBTREE,
2177                                 "inode_bad_map", &ctx->inode_bad_map);
2178                 if (pctx.errcode) {
2179                         pctx.num = 3;
2180                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2181                         /* Should never get here */
2182                         ctx->flags |= E2F_FLAG_ABORT;
2183                         return;
2184                 }
2185         }
2186         ext2fs_mark_inode_bitmap2(ctx->inode_bad_map, ino);
2187 }
2188
2189 static void add_encrypted_dir(e2fsck_t ctx, ino_t ino)
2190 {
2191         struct          problem_context pctx;
2192
2193         if (!ctx->encrypted_dirs) {
2194                 pctx.errcode = ext2fs_u32_list_create(&ctx->encrypted_dirs, 0);
2195                 if (pctx.errcode)
2196                         goto error;
2197         }
2198         pctx.errcode = ext2fs_u32_list_add(ctx->encrypted_dirs, ino);
2199         if (pctx.errcode == 0)
2200                 return;
2201 error:
2202         fix_problem(ctx, PR_1_ALLOCATE_ENCRYPTED_DIRLIST, &pctx);
2203         /* Should never get here */
2204         ctx->flags |= E2F_FLAG_ABORT;
2205 }
2206
2207 /*
2208  * This procedure will allocate the inode "bb" (badblock) map table
2209  */
2210 static void alloc_bb_map(e2fsck_t ctx)
2211 {
2212         struct          problem_context pctx;
2213
2214         clear_problem_context(&pctx);
2215         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2216                         _("inode in bad block map"), EXT2FS_BMAP64_RBTREE,
2217                         "inode_bb_map", &ctx->inode_bb_map);
2218         if (pctx.errcode) {
2219                 pctx.num = 4;
2220                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2221                 /* Should never get here */
2222                 ctx->flags |= E2F_FLAG_ABORT;
2223                 return;
2224         }
2225 }
2226
2227 /*
2228  * This procedure will allocate the inode imagic table
2229  */
2230 static void alloc_imagic_map(e2fsck_t ctx)
2231 {
2232         struct          problem_context pctx;
2233
2234         clear_problem_context(&pctx);
2235         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2236                         _("imagic inode map"), EXT2FS_BMAP64_RBTREE,
2237                         "inode_imagic_map", &ctx->inode_imagic_map);
2238         if (pctx.errcode) {
2239                 pctx.num = 5;
2240                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2241                 /* Should never get here */
2242                 ctx->flags |= E2F_FLAG_ABORT;
2243                 return;
2244         }
2245 }
2246
2247 /*
2248  * Marks a block as in use, setting the dup_map if it's been set
2249  * already.  Called by process_block and process_bad_block.
2250  *
2251  * WARNING: Assumes checks have already been done to make sure block
2252  * is valid.  This is true in both process_block and process_bad_block.
2253  */
2254 static _INLINE_ void mark_block_used(e2fsck_t ctx, blk64_t block)
2255 {
2256         struct          problem_context pctx;
2257
2258         clear_problem_context(&pctx);
2259
2260         if (ext2fs_fast_test_block_bitmap2(ctx->block_found_map, block)) {
2261                 if (!ctx->block_dup_map) {
2262                         pctx.errcode = e2fsck_allocate_block_bitmap(ctx->fs,
2263                                         _("multiply claimed block map"),
2264                                         EXT2FS_BMAP64_RBTREE, "block_dup_map",
2265                                         &ctx->block_dup_map);
2266                         if (pctx.errcode) {
2267                                 pctx.num = 3;
2268                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR,
2269                                             &pctx);
2270                                 /* Should never get here */
2271                                 ctx->flags |= E2F_FLAG_ABORT;
2272                                 return;
2273                         }
2274                 }
2275                 ext2fs_fast_mark_block_bitmap2(ctx->block_dup_map, block);
2276         } else {
2277                 ext2fs_fast_mark_block_bitmap2(ctx->block_found_map, block);
2278         }
2279 }
2280
2281 /*
2282  * When cluster size is greater than one block, it is caller's responsibility
2283  * to make sure block parameter starts at a cluster boundary.
2284  */
2285 static _INLINE_ void mark_blocks_used(e2fsck_t ctx, blk64_t block,
2286                                       unsigned int num)
2287 {
2288         if (ext2fs_test_block_bitmap_range2(ctx->block_found_map, block, num))
2289                 ext2fs_mark_block_bitmap_range2(ctx->block_found_map, block, num);
2290         else {
2291                 int i;
2292                 for (i = 0; i < num; i += EXT2FS_CLUSTER_RATIO(ctx->fs))
2293                         mark_block_used(ctx, block + i);
2294         }
2295 }
2296
2297 /*
2298  * Adjust the extended attribute block's reference counts at the end
2299  * of pass 1, either by subtracting out references for EA blocks that
2300  * are still referenced in ctx->refcount, or by adding references for
2301  * EA blocks that had extra references as accounted for in
2302  * ctx->refcount_extra.
2303  */
2304 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
2305                                     char *block_buf, int adjust_sign)
2306 {
2307         struct ext2_ext_attr_header     *header;
2308         struct problem_context          pctx;
2309         ext2_filsys                     fs = ctx->fs;
2310         blk64_t                         blk;
2311         __u32                           should_be;
2312         ea_value_t                      count;
2313
2314         clear_problem_context(&pctx);
2315
2316         ea_refcount_intr_begin(refcount);
2317         while (1) {
2318                 if ((blk = ea_refcount_intr_next(refcount, &count)) == 0)
2319                         break;
2320                 pctx.blk = blk;
2321                 pctx.errcode = ext2fs_read_ext_attr3(fs, blk, block_buf,
2322                                                      pctx.ino);
2323                 if (pctx.errcode) {
2324                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
2325                         return;
2326                 }
2327                 header = (struct ext2_ext_attr_header *) block_buf;
2328                 pctx.blkcount = header->h_refcount;
2329                 should_be = header->h_refcount + adjust_sign * (int)count;
2330                 pctx.num = should_be;
2331                 if (fix_problem(ctx, PR_1_EXTATTR_REFCOUNT, &pctx)) {
2332                         header->h_refcount = should_be;
2333                         pctx.errcode = ext2fs_write_ext_attr3(fs, blk,
2334                                                              block_buf,
2335                                                              pctx.ino);
2336                         if (pctx.errcode) {
2337                                 fix_problem(ctx, PR_1_EXTATTR_WRITE_ABORT,
2338                                             &pctx);
2339                                 continue;
2340                         }
2341                 }
2342         }
2343 }
2344
2345 /*
2346  * Handle processing the extended attribute blocks
2347  */
2348 static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx,
2349                            char *block_buf, struct ea_quota *ea_block_quota)
2350 {
2351         ext2_filsys fs = ctx->fs;
2352         ext2_ino_t      ino = pctx->ino;
2353         struct ext2_inode *inode = pctx->inode;
2354         blk64_t         blk;
2355         char *          end;
2356         struct ext2_ext_attr_header *header;
2357         struct ext2_ext_attr_entry *first, *entry;
2358         blk64_t         quota_blocks = EXT2FS_C2B(fs, 1);
2359         __u64           quota_inodes = 0;
2360         region_t        region = 0;
2361         int             failed_csum = 0;
2362
2363         ea_block_quota->blocks = 0;
2364         ea_block_quota->inodes = 0;
2365
2366         blk = ext2fs_file_acl_block(fs, inode);
2367         if (blk == 0)
2368                 return 0;
2369
2370         /*
2371          * If the Extended attribute flag isn't set, then a non-zero
2372          * file acl means that the inode is corrupted.
2373          *
2374          * Or if the extended attribute block is an invalid block,
2375          * then the inode is also corrupted.
2376          */
2377         if (!ext2fs_has_feature_xattr(fs->super) ||
2378             (blk < fs->super->s_first_data_block) ||
2379             (blk >= ext2fs_blocks_count(fs->super))) {
2380                 mark_inode_bad(ctx, ino);
2381                 return 0;
2382         }
2383
2384         /* If ea bitmap hasn't been allocated, create it */
2385         if (!ctx->block_ea_map) {
2386                 pctx->errcode = e2fsck_allocate_block_bitmap(fs,
2387                                         _("ext attr block map"),
2388                                         EXT2FS_BMAP64_RBTREE, "block_ea_map",
2389                                         &ctx->block_ea_map);
2390                 if (pctx->errcode) {
2391                         pctx->num = 2;
2392                         fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, pctx);
2393                         ctx->flags |= E2F_FLAG_ABORT;
2394                         return 0;
2395                 }
2396         }
2397
2398         /* Create the EA refcount structure if necessary */
2399         if (!ctx->refcount) {
2400                 pctx->errcode = ea_refcount_create(0, &ctx->refcount);
2401                 if (pctx->errcode) {
2402                         pctx->num = 1;
2403                         fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2404                         ctx->flags |= E2F_FLAG_ABORT;
2405                         return 0;
2406                 }
2407         }
2408
2409 #if 0
2410         /* Debugging text */
2411         printf("Inode %u has EA block %u\n", ino, blk);
2412 #endif
2413
2414         /* Have we seen this EA block before? */
2415         if (ext2fs_fast_test_block_bitmap2(ctx->block_ea_map, blk)) {
2416                 ea_block_quota->blocks = EXT2FS_C2B(fs, 1);
2417                 ea_block_quota->inodes = 0;
2418
2419                 if (ctx->ea_block_quota_blocks) {
2420                         ea_refcount_fetch(ctx->ea_block_quota_blocks, blk,
2421                                           &quota_blocks);
2422                         if (quota_blocks)
2423                                 ea_block_quota->blocks = quota_blocks;
2424                 }
2425
2426                 if (ctx->ea_block_quota_inodes)
2427                         ea_refcount_fetch(ctx->ea_block_quota_inodes, blk,
2428                                           &ea_block_quota->inodes);
2429
2430                 if (ea_refcount_decrement(ctx->refcount, blk, 0) == 0)
2431                         return 1;
2432                 /* Ooops, this EA was referenced more than it stated */
2433                 if (!ctx->refcount_extra) {
2434                         pctx->errcode = ea_refcount_create(0,
2435                                            &ctx->refcount_extra);
2436                         if (pctx->errcode) {
2437                                 pctx->num = 2;
2438                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2439                                 ctx->flags |= E2F_FLAG_ABORT;
2440                                 return 0;
2441                         }
2442                 }
2443                 ea_refcount_increment(ctx->refcount_extra, blk, 0);
2444                 return 1;
2445         }
2446
2447         /*
2448          * OK, we haven't seen this EA block yet.  So we need to
2449          * validate it
2450          */
2451         pctx->blk = blk;
2452         pctx->errcode = ext2fs_read_ext_attr3(fs, blk, block_buf, pctx->ino);
2453         if (pctx->errcode == EXT2_ET_EXT_ATTR_CSUM_INVALID) {
2454                 pctx->errcode = 0;
2455                 failed_csum = 1;
2456         } else if (pctx->errcode == EXT2_ET_BAD_EA_HEADER)
2457                 pctx->errcode = 0;
2458
2459         if (pctx->errcode &&
2460             fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx)) {
2461                 pctx->errcode = 0;
2462                 goto clear_extattr;
2463         }
2464         header = (struct ext2_ext_attr_header *) block_buf;
2465         pctx->blk = ext2fs_file_acl_block(fs, inode);
2466         if (((ctx->ext_attr_ver == 1) &&
2467              (header->h_magic != EXT2_EXT_ATTR_MAGIC_v1)) ||
2468             ((ctx->ext_attr_ver == 2) &&
2469              (header->h_magic != EXT2_EXT_ATTR_MAGIC))) {
2470                 if (fix_problem(ctx, PR_1_BAD_EA_BLOCK, pctx))
2471                         goto clear_extattr;
2472         }
2473
2474         if (header->h_blocks != 1) {
2475                 if (fix_problem(ctx, PR_1_EA_MULTI_BLOCK, pctx))
2476                         goto clear_extattr;
2477         }
2478
2479         if (pctx->errcode && fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx))
2480                 goto clear_extattr;
2481
2482         region = region_create(0, fs->blocksize);
2483         if (!region) {
2484                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
2485                 ctx->flags |= E2F_FLAG_ABORT;
2486                 return 0;
2487         }
2488         if (region_allocate(region, 0, sizeof(struct ext2_ext_attr_header))) {
2489                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2490                         goto clear_extattr;
2491         }
2492
2493         first = (struct ext2_ext_attr_entry *)(header+1);
2494         end = block_buf + fs->blocksize;
2495         entry = first;
2496         while ((char *)entry < end && *(__u32 *)entry) {
2497                 __u32 hash;
2498
2499                 if (region_allocate(region, (char *)entry - (char *)header,
2500                                    EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
2501                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2502                                 goto clear_extattr;
2503                         break;
2504                 }
2505                 if ((ctx->ext_attr_ver == 1 &&
2506                      (entry->e_name_len == 0 || entry->e_name_index != 0)) ||
2507                     (ctx->ext_attr_ver == 2 &&
2508                      entry->e_name_index == 0)) {
2509                         if (fix_problem(ctx, PR_1_EA_BAD_NAME, pctx))
2510                                 goto clear_extattr;
2511                         break;
2512                 }
2513                 if (entry->e_value_inum == 0) {
2514                         if (entry->e_value_offs + entry->e_value_size >
2515                             fs->blocksize) {
2516                                 if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2517                                         goto clear_extattr;
2518                                 break;
2519                         }
2520                         if (entry->e_value_size &&
2521                             region_allocate(region, entry->e_value_offs,
2522                                             EXT2_EXT_ATTR_SIZE(entry->e_value_size))) {
2523                                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION,
2524                                                 pctx))
2525                                         goto clear_extattr;
2526                         }
2527
2528                         hash = ext2fs_ext_attr_hash_entry(entry, block_buf +
2529                                                           entry->e_value_offs);
2530
2531                         if (entry->e_hash != hash) {
2532                                 pctx->num = entry->e_hash;
2533                                 if (fix_problem(ctx, PR_1_ATTR_HASH, pctx))
2534                                         goto clear_extattr;
2535                                 entry->e_hash = hash;
2536                         }
2537                 } else {
2538                         problem_t problem;
2539                         blk64_t entry_quota_blocks;
2540
2541                         problem = check_large_ea_inode(ctx, entry, pctx,
2542                                                        &entry_quota_blocks);
2543                         if (problem && fix_problem(ctx, problem, pctx))
2544                                 goto clear_extattr;
2545
2546                         quota_blocks += entry_quota_blocks;
2547                         quota_inodes++;
2548                 }
2549
2550                 entry = EXT2_EXT_ATTR_NEXT(entry);
2551         }
2552         if (region_allocate(region, (char *)entry - (char *)header, 4)) {
2553                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2554                         goto clear_extattr;
2555         }
2556         region_free(region);
2557
2558         /*
2559          * We only get here if there was no other errors that were fixed.
2560          * If there was a checksum fail, ask to correct it.
2561          */
2562         if (failed_csum &&
2563             fix_problem(ctx, PR_1_EA_BLOCK_ONLY_CSUM_INVALID, pctx)) {
2564                 pctx->errcode = ext2fs_write_ext_attr3(fs, blk, block_buf,
2565                                                        pctx->ino);
2566                 if (pctx->errcode)
2567                         return 0;
2568         }
2569
2570         if (quota_blocks != EXT2FS_C2B(fs, 1)) {
2571                 if (!ctx->ea_block_quota_blocks) {
2572                         pctx->errcode = ea_refcount_create(0,
2573                                                 &ctx->ea_block_quota_blocks);
2574                         if (pctx->errcode) {
2575                                 pctx->num = 3;
2576                                 goto refcount_fail;
2577                         }
2578                 }
2579                 ea_refcount_store(ctx->ea_block_quota_blocks, blk,
2580                                   quota_blocks);
2581         }
2582
2583         if (quota_inodes) {
2584                 if (!ctx->ea_block_quota_inodes) {
2585                         pctx->errcode = ea_refcount_create(0,
2586                                                 &ctx->ea_block_quota_inodes);
2587                         if (pctx->errcode) {
2588                                 pctx->num = 4;
2589 refcount_fail:
2590                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2591                                 ctx->flags |= E2F_FLAG_ABORT;
2592                                 return 0;
2593                         }
2594                 }
2595
2596                 ea_refcount_store(ctx->ea_block_quota_inodes, blk,
2597                                   quota_inodes);
2598         }
2599         ea_block_quota->blocks = quota_blocks;
2600         ea_block_quota->inodes = quota_inodes;
2601
2602         inc_ea_inode_refs(ctx, pctx, first, end);
2603         ea_refcount_store(ctx->refcount, blk, header->h_refcount - 1);
2604         mark_block_used(ctx, blk);
2605         ext2fs_fast_mark_block_bitmap2(ctx->block_ea_map, blk);
2606         return 1;
2607
2608 clear_extattr:
2609         if (region)
2610                 region_free(region);
2611         ext2fs_file_acl_block_set(fs, inode, 0);
2612         e2fsck_write_inode(ctx, ino, inode, "check_ext_attr");
2613         return 0;
2614 }
2615
2616 /* Returns 1 if bad htree, 0 if OK */
2617 static int handle_htree(e2fsck_t ctx, struct problem_context *pctx,
2618                         ext2_ino_t ino, struct ext2_inode *inode,
2619                         char *block_buf)
2620 {
2621         struct ext2_dx_root_info        *root;
2622         ext2_filsys                     fs = ctx->fs;
2623         errcode_t                       retval;
2624         blk64_t                         blk;
2625
2626         if ((!LINUX_S_ISDIR(inode->i_mode) &&
2627              fix_problem(ctx, PR_1_HTREE_NODIR, pctx)) ||
2628             (!ext2fs_has_feature_dir_index(fs->super) &&
2629              fix_problem(ctx, PR_1_HTREE_SET, pctx)))
2630                 return 1;
2631
2632         pctx->errcode = ext2fs_bmap2(fs, ino, inode, 0, 0, 0, 0, &blk);
2633
2634         if ((pctx->errcode) ||
2635             (blk == 0) ||
2636             (blk < fs->super->s_first_data_block) ||
2637             (blk >= ext2fs_blocks_count(fs->super))) {
2638                 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2639                         return 1;
2640                 else
2641                         return 0;
2642         }
2643
2644         retval = io_channel_read_blk64(fs->io, blk, 1, block_buf);
2645         if (retval && fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2646                 return 1;
2647
2648         /* XXX should check that beginning matches a directory */
2649         root = (struct ext2_dx_root_info *) (block_buf + 24);
2650
2651         if ((root->reserved_zero || root->info_length < 8) &&
2652             fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2653                 return 1;
2654
2655         pctx->num = root->hash_version;
2656         if ((root->hash_version != EXT2_HASH_LEGACY) &&
2657             (root->hash_version != EXT2_HASH_HALF_MD4) &&
2658             (root->hash_version != EXT2_HASH_TEA) &&
2659             fix_problem(ctx, PR_1_HTREE_HASHV, pctx))
2660                 return 1;
2661
2662         if ((root->unused_flags & EXT2_HASH_FLAG_INCOMPAT) &&
2663             fix_problem(ctx, PR_1_HTREE_INCOMPAT, pctx))
2664                 return 1;
2665
2666         pctx->num = root->indirect_levels;
2667         if ((root->indirect_levels > ext2_dir_htree_level(fs)) &&
2668             fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2669                 return 1;
2670
2671         return 0;
2672 }
2673
2674 void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino,
2675                         struct ext2_inode *inode, int restart_flag,
2676                         const char *source)
2677 {
2678         inode->i_flags = 0;
2679         inode->i_links_count = 0;
2680         ext2fs_icount_store(ctx->inode_link_info, ino, 0);
2681         inode->i_dtime = ctx->now;
2682
2683         /*
2684          * If a special inode has such rotten block mappings that we
2685          * want to clear the whole inode, be sure to actually zap
2686          * the block maps because i_links_count isn't checked for
2687          * special inodes, and we'll end up right back here the next
2688          * time we run fsck.
2689          */
2690         if (ino < EXT2_FIRST_INODE(ctx->fs->super))
2691                 memset(inode->i_block, 0, sizeof(inode->i_block));
2692
2693         ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
2694         ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
2695         if (ctx->inode_reg_map)
2696                 ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
2697         if (ctx->inode_bad_map)
2698                 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
2699
2700         /*
2701          * If the inode was partially accounted for before processing
2702          * was aborted, we need to restart the pass 1 scan.
2703          */
2704         ctx->flags |= restart_flag;
2705
2706         if (ino == EXT2_BAD_INO)
2707                 memset(inode, 0, sizeof(struct ext2_inode));
2708
2709         e2fsck_write_inode(ctx, ino, inode, source);
2710 }
2711
2712 /*
2713  * Use the multiple-blocks reclamation code to fix alignment problems in
2714  * a bigalloc filesystem.  We want a logical cluster to map to *only* one
2715  * physical cluster, and we want the block offsets within that cluster to
2716  * line up.
2717  */
2718 static int has_unaligned_cluster_map(e2fsck_t ctx,
2719                                      blk64_t last_pblk, blk64_t last_lblk,
2720                                      blk64_t pblk, blk64_t lblk)
2721 {
2722         blk64_t cluster_mask;
2723
2724         if (!ctx->fs->cluster_ratio_bits)
2725                 return 0;
2726         cluster_mask = EXT2FS_CLUSTER_MASK(ctx->fs);
2727
2728         /*
2729          * If the block in the logical cluster doesn't align with the block in
2730          * the physical cluster...
2731          */
2732         if ((lblk & cluster_mask) != (pblk & cluster_mask))
2733                 return 1;
2734
2735         /*
2736          * If we cross a physical cluster boundary within a logical cluster...
2737          */
2738         if (last_pblk && (lblk & cluster_mask) != 0 &&
2739             EXT2FS_B2C(ctx->fs, lblk) == EXT2FS_B2C(ctx->fs, last_lblk) &&
2740             EXT2FS_B2C(ctx->fs, pblk) != EXT2FS_B2C(ctx->fs, last_pblk))
2741                 return 1;
2742
2743         return 0;
2744 }
2745
2746 static void scan_extent_node(e2fsck_t ctx, struct problem_context *pctx,
2747                              struct process_block_struct *pb,
2748                              blk64_t start_block, blk64_t end_block,
2749                              blk64_t eof_block,
2750                              ext2_extent_handle_t ehandle,
2751                              int try_repairs)
2752 {
2753         struct ext2fs_extent    extent;
2754         blk64_t                 blk, last_lblk;
2755         unsigned int            i, n;
2756         int                     is_dir, is_leaf;
2757         problem_t               problem;
2758         struct ext2_extent_info info;
2759         int                     failed_csum = 0;
2760
2761         if (pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID)
2762                 failed_csum = 1;
2763
2764         pctx->errcode = ext2fs_extent_get_info(ehandle, &info);
2765         if (pctx->errcode)
2766                 return;
2767         if (!(ctx->options & E2F_OPT_FIXES_ONLY) &&
2768             !pb->eti.force_rebuild) {
2769                 struct extent_tree_level *etl;
2770
2771                 etl = pb->eti.ext_info + info.curr_level;
2772                 etl->num_extents += info.num_entries;
2773                 etl->max_extents += info.max_entries;
2774                 /*
2775                  * Implementation wart: Splitting extent blocks when appending
2776                  * will leave the old block with one free entry.  Therefore
2777                  * unless the node is totally full, pretend that a non-root
2778                  * extent block can hold one fewer entry than it actually does,
2779                  * so that we don't repeatedly rebuild the extent tree.
2780                  */
2781                 if (info.curr_level && info.num_entries < info.max_entries)
2782                         etl->max_extents--;
2783         }
2784
2785         pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_FIRST_SIB,
2786                                           &extent);
2787         while ((pctx->errcode == 0 ||
2788                 pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID) &&
2789                info.num_entries-- > 0) {
2790                 is_leaf = extent.e_flags & EXT2_EXTENT_FLAGS_LEAF;
2791                 is_dir = LINUX_S_ISDIR(pctx->inode->i_mode);
2792                 last_lblk = extent.e_lblk + extent.e_len - 1;
2793
2794                 problem = 0;
2795                 pctx->blk = extent.e_pblk;
2796                 pctx->blk2 = extent.e_lblk;
2797                 pctx->num = extent.e_len;
2798                 pctx->blkcount = extent.e_lblk + extent.e_len;
2799
2800                 if (extent.e_pblk == 0 ||
2801                     extent.e_pblk < ctx->fs->super->s_first_data_block ||
2802                     extent.e_pblk >= ext2fs_blocks_count(ctx->fs->super))
2803                         problem = PR_1_EXTENT_BAD_START_BLK;
2804                 else if (extent.e_lblk < start_block)
2805                         problem = PR_1_OUT_OF_ORDER_EXTENTS;
2806                 else if ((end_block && last_lblk > end_block) &&
2807                          (!(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT &&
2808                                 last_lblk > eof_block)))
2809                         problem = PR_1_EXTENT_END_OUT_OF_BOUNDS;
2810                 else if (is_leaf && extent.e_len == 0)
2811                         problem = PR_1_EXTENT_LENGTH_ZERO;
2812                 else if (is_leaf &&
2813                          (extent.e_pblk + extent.e_len) >
2814                          ext2fs_blocks_count(ctx->fs->super))
2815                         problem = PR_1_EXTENT_ENDS_BEYOND;
2816                 else if (is_leaf && is_dir &&
2817                          ((extent.e_lblk + extent.e_len) >
2818                           (1U << (21 - ctx->fs->super->s_log_block_size))))
2819                         problem = PR_1_TOOBIG_DIR;
2820
2821                 if (is_leaf && problem == 0 && extent.e_len > 0) {
2822 #if 0
2823                         printf("extent_region(ino=%u, expect=%llu, "
2824                                "lblk=%llu, len=%u)\n",
2825                                pb->ino, pb->next_lblock,
2826                                extent.e_lblk, extent.e_len);
2827 #endif
2828                         if (extent.e_lblk < pb->next_lblock)
2829                                 problem = PR_1_EXTENT_COLLISION;
2830                         else if (extent.e_lblk + extent.e_len > pb->next_lblock)
2831                                 pb->next_lblock = extent.e_lblk + extent.e_len;
2832                 }
2833
2834                 /*
2835                  * Uninitialized blocks in a directory?  Clear the flag and
2836                  * we'll interpret the blocks later.
2837                  */
2838                 if (try_repairs && is_dir && problem == 0 &&
2839                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
2840                     fix_problem(ctx, PR_1_UNINIT_DBLOCK, pctx)) {
2841                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
2842                         pb->inode_modified = 1;
2843                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
2844                                                               &extent);
2845                         if (pctx->errcode)
2846                                 return;
2847                         failed_csum = 0;
2848                 }
2849
2850                 if (try_repairs && problem) {
2851 report_problem:
2852                         if (fix_problem(ctx, problem, pctx)) {
2853                                 if (ctx->invalid_bitmaps) {
2854                                         /*
2855                                          * If fsck knows the bitmaps are bad,
2856                                          * skip to the next extent and
2857                                          * try to clear this extent again
2858                                          * after fixing the bitmaps, by
2859                                          * restarting fsck.
2860                                          */
2861                                         pctx->errcode = ext2fs_extent_get(
2862                                                           ehandle,
2863                                                           EXT2_EXTENT_NEXT_SIB,
2864                                                           &extent);
2865                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
2866                                         if (pctx->errcode ==
2867                                                     EXT2_ET_NO_CURRENT_NODE) {
2868                                                 pctx->errcode = 0;
2869                                                 break;
2870                                         }
2871                                         continue;
2872                                 }
2873                                 e2fsck_read_bitmaps(ctx);
2874                                 pb->inode_modified = 1;
2875                                 pctx->errcode =
2876                                         ext2fs_extent_delete(ehandle, 0);
2877                                 if (pctx->errcode) {
2878                                         pctx->str = "ext2fs_extent_delete";
2879                                         return;
2880                                 }
2881                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
2882                                 if (pctx->errcode &&
2883                                     pctx->errcode != EXT2_ET_NO_CURRENT_NODE) {
2884                                         pctx->str = "ext2fs_extent_fix_parents";
2885                                         return;
2886                                 }
2887                                 pctx->errcode = ext2fs_extent_get(ehandle,
2888                                                                   EXT2_EXTENT_CURRENT,
2889                                                                   &extent);
2890                                 if (pctx->errcode == EXT2_ET_NO_CURRENT_NODE) {
2891                                         pctx->errcode = 0;
2892                                         break;
2893                                 }
2894                                 failed_csum = 0;
2895                                 continue;
2896                         }
2897                         goto next;
2898                 }
2899
2900                 if (!is_leaf) {
2901                         blk64_t lblk = extent.e_lblk;
2902                         int next_try_repairs = 1;
2903
2904                         blk = extent.e_pblk;
2905
2906                         /*
2907                          * If this lower extent block collides with critical
2908                          * metadata, don't try to repair the damage.  Pass 1b
2909                          * will reallocate the block; then we can try again.
2910                          */
2911                         if (pb->ino != EXT2_RESIZE_INO &&
2912                             extent.e_pblk < ctx->fs->super->s_blocks_count &&
2913                             ext2fs_test_block_bitmap2(ctx->block_metadata_map,
2914                                                       extent.e_pblk)) {
2915                                 next_try_repairs = 0;
2916                                 pctx->blk = blk;
2917                                 fix_problem(ctx,
2918                                             PR_1_CRITICAL_METADATA_COLLISION,
2919                                             pctx);
2920                                 if ((ctx->options & E2F_OPT_NO) == 0)
2921                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
2922                         }
2923                         pctx->errcode = ext2fs_extent_get(ehandle,
2924                                                   EXT2_EXTENT_DOWN, &extent);
2925                         if (pctx->errcode &&
2926                             pctx->errcode != EXT2_ET_EXTENT_CSUM_INVALID) {
2927                                 pctx->str = "EXT2_EXTENT_DOWN";
2928                                 problem = PR_1_EXTENT_HEADER_INVALID;
2929                                 if (!next_try_repairs)
2930                                         return;
2931                                 if (pctx->errcode == EXT2_ET_EXTENT_HEADER_BAD)
2932                                         goto report_problem;
2933                                 return;
2934                         }
2935                         /* The next extent should match this index's logical start */
2936                         if (extent.e_lblk != lblk) {
2937                                 struct ext2_extent_info e_info;
2938
2939                                 ext2fs_extent_get_info(ehandle, &e_info);
2940                                 pctx->blk = lblk;
2941                                 pctx->blk2 = extent.e_lblk;
2942                                 pctx->num = e_info.curr_level - 1;
2943                                 problem = PR_1_EXTENT_INDEX_START_INVALID;
2944                                 if (fix_problem(ctx, problem, pctx)) {
2945                                         pb->inode_modified = 1;
2946                                         pctx->errcode =
2947                                                 ext2fs_extent_fix_parents(ehandle);
2948                                         if (pctx->errcode) {
2949                                                 pctx->str = "ext2fs_extent_fix_parents";
2950                                                 return;
2951                                         }
2952                                 }
2953                         }
2954                         scan_extent_node(ctx, pctx, pb, extent.e_lblk,
2955                                          last_lblk, eof_block, ehandle,
2956                                          next_try_repairs);
2957                         if (pctx->errcode)
2958                                 return;
2959                         pctx->errcode = ext2fs_extent_get(ehandle,
2960                                                   EXT2_EXTENT_UP, &extent);
2961                         if (pctx->errcode) {
2962                                 pctx->str = "EXT2_EXTENT_UP";
2963                                 return;
2964                         }
2965                         mark_block_used(ctx, blk);
2966                         pb->num_blocks++;
2967                         goto next;
2968                 }
2969
2970                 if ((pb->previous_block != 0) &&
2971                     (pb->previous_block+1 != extent.e_pblk)) {
2972                         if (ctx->options & E2F_OPT_FRAGCHECK) {
2973                                 char type = '?';
2974
2975                                 if (pb->is_dir)
2976                                         type = 'd';
2977                                 else if (pb->is_reg)
2978                                         type = 'f';
2979
2980                                 printf(("%6lu(%c): expecting %6lu "
2981                                         "actual extent "
2982                                         "phys %6lu log %lu len %lu\n"),
2983                                        (unsigned long) pctx->ino, type,
2984                                        (unsigned long) pb->previous_block+1,
2985                                        (unsigned long) extent.e_pblk,
2986                                        (unsigned long) extent.e_lblk,
2987                                        (unsigned long) extent.e_len);
2988                         }
2989                         pb->fragmented = 1;
2990                 }
2991                 /*
2992                  * If we notice a gap in the logical block mappings of an
2993                  * extent-mapped directory, offer to close the hole by
2994                  * moving the logical block down, otherwise we'll go mad in
2995                  * pass 3 allocating empty directory blocks to fill the hole.
2996                  */
2997                 if (try_repairs && is_dir &&
2998                     pb->last_block + 1 < extent.e_lblk) {
2999                         blk64_t new_lblk;
3000
3001                         new_lblk = pb->last_block + 1;
3002                         if (EXT2FS_CLUSTER_RATIO(ctx->fs) > 1)
3003                                 new_lblk = ((new_lblk +
3004                                              EXT2FS_CLUSTER_RATIO(ctx->fs) - 1) &
3005                                             ~EXT2FS_CLUSTER_MASK(ctx->fs)) |
3006                                            (extent.e_pblk &
3007                                             EXT2FS_CLUSTER_MASK(ctx->fs));
3008                         pctx->blk = extent.e_lblk;
3009                         pctx->blk2 = new_lblk;
3010                         if (fix_problem(ctx, PR_1_COLLAPSE_DBLOCK, pctx)) {
3011                                 extent.e_lblk = new_lblk;
3012                                 pb->inode_modified = 1;
3013                                 pctx->errcode = ext2fs_extent_replace(ehandle,
3014                                                                 0, &extent);
3015                                 if (pctx->errcode) {
3016                                         pctx->errcode = 0;
3017                                         goto alloc_later;
3018                                 }
3019                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
3020                                 if (pctx->errcode)
3021                                         goto failed_add_dir_block;
3022                                 pctx->errcode = ext2fs_extent_goto(ehandle,
3023                                                                 extent.e_lblk);
3024                                 if (pctx->errcode)
3025                                         goto failed_add_dir_block;
3026                                 last_lblk = extent.e_lblk + extent.e_len - 1;
3027                                 failed_csum = 0;
3028                         }
3029                 }
3030 alloc_later:
3031                 if (is_dir) {
3032                         while (++pb->last_db_block <
3033                                (e2_blkcnt_t) extent.e_lblk) {
3034                                 pctx->errcode = ext2fs_add_dir_block2(
3035                                                         ctx->fs->dblist,
3036                                                         pb->ino, 0,
3037                                                         pb->last_db_block);
3038                                 if (pctx->errcode) {
3039                                         pctx->blk = 0;
3040                                         pctx->num = pb->last_db_block;
3041                                         goto failed_add_dir_block;
3042                                 }
3043                         }
3044
3045                         for (i = 0; i < extent.e_len; i++) {
3046                                 pctx->errcode = ext2fs_add_dir_block2(
3047                                                         ctx->fs->dblist,
3048                                                         pctx->ino,
3049                                                         extent.e_pblk + i,
3050                                                         extent.e_lblk + i);
3051                                 if (pctx->errcode) {
3052                                         pctx->blk = extent.e_pblk + i;
3053                                         pctx->num = extent.e_lblk + i;
3054                                 failed_add_dir_block:
3055                                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3056                                         /* Should never get here */
3057                                         ctx->flags |= E2F_FLAG_ABORT;
3058                                         return;
3059                                 }
3060                         }
3061                         if (extent.e_len > 0)
3062                                 pb->last_db_block = extent.e_lblk + extent.e_len - 1;
3063                 }
3064                 if (has_unaligned_cluster_map(ctx, pb->previous_block,
3065                                               pb->last_block,
3066                                               extent.e_pblk,
3067                                               extent.e_lblk)) {
3068                         for (i = 0; i < extent.e_len; i++) {
3069                                 pctx->blk = extent.e_lblk + i;
3070                                 pctx->blk2 = extent.e_pblk + i;
3071                                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3072                                 mark_block_used(ctx, extent.e_pblk + i);
3073                                 mark_block_used(ctx, extent.e_pblk + i);
3074                         }
3075                 }
3076
3077                 /*
3078                  * Check whether first cluster got marked in previous iteration.
3079                  */
3080                 if (ctx->fs->cluster_ratio_bits &&
3081                     pb->previous_block &&
3082                     (EXT2FS_B2C(ctx->fs, extent.e_pblk) ==
3083                      EXT2FS_B2C(ctx->fs, pb->previous_block)))
3084                         /* Set blk to the beginning of next cluster. */
3085                         blk = EXT2FS_C2B(
3086                                 ctx->fs,
3087                                 EXT2FS_B2C(ctx->fs, extent.e_pblk) + 1);
3088                 else
3089                         /* Set blk to the beginning of current cluster. */
3090                         blk = EXT2FS_C2B(ctx->fs,
3091                                          EXT2FS_B2C(ctx->fs, extent.e_pblk));
3092
3093                 if (blk < extent.e_pblk + extent.e_len) {
3094                         mark_blocks_used(ctx, blk,
3095                                          extent.e_pblk + extent.e_len - blk);
3096                         n = DIV_ROUND_UP(extent.e_pblk + extent.e_len - blk,
3097                                          EXT2FS_CLUSTER_RATIO(ctx->fs));
3098                         pb->num_blocks += n;
3099                 }
3100                 pb->last_block = extent.e_lblk + extent.e_len - 1;
3101                 pb->previous_block = extent.e_pblk + extent.e_len - 1;
3102                 start_block = pb->last_block = last_lblk;
3103                 if (is_leaf && !is_dir &&
3104                     !(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT))
3105                         pb->last_init_lblock = last_lblk;
3106         next:
3107                 pctx->errcode = ext2fs_extent_get(ehandle,
3108                                                   EXT2_EXTENT_NEXT_SIB,
3109                                                   &extent);
3110         }
3111
3112         /* Failed csum but passes checks?  Ask to fix checksum. */
3113         if (failed_csum &&
3114             fix_problem(ctx, PR_1_EXTENT_ONLY_CSUM_INVALID, pctx)) {
3115                 pb->inode_modified = 1;
3116                 pctx->errcode = ext2fs_extent_replace(ehandle, 0, &extent);
3117                 if (pctx->errcode)
3118                         return;
3119         }
3120
3121         if (pctx->errcode == EXT2_ET_EXTENT_NO_NEXT)
3122                 pctx->errcode = 0;
3123 }
3124
3125 static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx,
3126                                  struct process_block_struct *pb)
3127 {
3128         struct ext2_extent_info info;
3129         struct ext2_inode       *inode = pctx->inode;
3130         ext2_extent_handle_t    ehandle;
3131         ext2_filsys             fs = ctx->fs;
3132         ext2_ino_t              ino = pctx->ino;
3133         errcode_t               retval;
3134         blk64_t                 eof_lblk;
3135         struct ext3_extent_header       *eh;
3136
3137         /* Check for a proper extent header... */
3138         eh = (struct ext3_extent_header *) &inode->i_block[0];
3139         retval = ext2fs_extent_header_verify(eh, sizeof(inode->i_block));
3140         if (retval) {
3141                 if (fix_problem(ctx, PR_1_MISSING_EXTENT_HEADER, pctx))
3142                         e2fsck_clear_inode(ctx, ino, inode, 0,
3143                                            "check_blocks_extents");
3144                 pctx->errcode = 0;
3145                 return;
3146         }
3147
3148         /* ...since this function doesn't fail if i_block is zeroed. */
3149         pctx->errcode = ext2fs_extent_open2(fs, ino, inode, &ehandle);
3150         if (pctx->errcode) {
3151                 if (fix_problem(ctx, PR_1_READ_EXTENT, pctx))
3152                         e2fsck_clear_inode(ctx, ino, inode, 0,
3153                                            "check_blocks_extents");
3154                 pctx->errcode = 0;
3155                 return;
3156         }
3157
3158         retval = ext2fs_extent_get_info(ehandle, &info);
3159         if (retval == 0) {
3160                 int max_depth = info.max_depth;
3161
3162                 if (max_depth >= MAX_EXTENT_DEPTH_COUNT)
3163                         max_depth = MAX_EXTENT_DEPTH_COUNT-1;
3164                 ctx->extent_depth_count[max_depth]++;
3165         }
3166
3167         /* Check maximum extent depth */
3168         pctx->blk = info.max_depth;
3169         pctx->blk2 = ext2fs_max_extent_depth(ehandle);
3170         if (pctx->blk2 < pctx->blk &&
3171             fix_problem(ctx, PR_1_EXTENT_BAD_MAX_DEPTH, pctx))
3172                 pb->eti.force_rebuild = 1;
3173
3174         /* Can we collect extent tree level stats? */
3175         pctx->blk = MAX_EXTENT_DEPTH_COUNT;
3176         if (pctx->blk2 > pctx->blk)
3177                 fix_problem(ctx, PR_1E_MAX_EXTENT_TREE_DEPTH, pctx);
3178         memset(pb->eti.ext_info, 0, sizeof(pb->eti.ext_info));
3179         pb->eti.ino = pb->ino;
3180
3181         pb->next_lblock = 0;
3182
3183         eof_lblk = ((EXT2_I_SIZE(inode) + fs->blocksize - 1) >>
3184                 EXT2_BLOCK_SIZE_BITS(fs->super)) - 1;
3185         scan_extent_node(ctx, pctx, pb, 0, 0, eof_lblk, ehandle, 1);
3186         if (pctx->errcode &&
3187             fix_problem(ctx, PR_1_EXTENT_ITERATE_FAILURE, pctx)) {
3188                 pb->num_blocks = 0;
3189                 inode->i_blocks = 0;
3190                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3191                                    "check_blocks_extents");
3192                 pctx->errcode = 0;
3193         }
3194         ext2fs_extent_free(ehandle);
3195
3196         /* Rebuild unless it's a dir and we're rehashing it */
3197         if (LINUX_S_ISDIR(inode->i_mode) &&
3198             e2fsck_dir_will_be_rehashed(ctx, ino))
3199                 return;
3200
3201         if (ctx->options & E2F_OPT_CONVERT_BMAP)
3202                 e2fsck_rebuild_extents_later(ctx, ino);
3203         else
3204                 e2fsck_should_rebuild_extents(ctx, pctx, &pb->eti, &info);
3205 }
3206
3207 /*
3208  * In fact we don't need to check blocks for an inode with inline data
3209  * because this inode doesn't have any blocks.  In this function all
3210  * we need to do is add this inode into dblist when it is a directory.
3211  */
3212 static void check_blocks_inline_data(e2fsck_t ctx, struct problem_context *pctx,
3213                                      struct process_block_struct *pb)
3214 {
3215         int     flags;
3216         size_t  inline_data_size = 0;
3217
3218         if (!pb->is_dir) {
3219                 pctx->errcode = 0;
3220                 return;
3221         }
3222
3223         /* Process the dirents in i_block[] as the "first" block. */
3224         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 0);
3225         if (pctx->errcode)
3226                 goto err;
3227
3228         /* Process the dirents in the EA as a "second" block. */
3229         flags = ctx->fs->flags;
3230         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3231         pctx->errcode = ext2fs_inline_data_size(ctx->fs, pb->ino,
3232                                                 &inline_data_size);
3233         ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3234                          (ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3235         if (pctx->errcode) {
3236                 pctx->errcode = 0;
3237                 return;
3238         }
3239
3240         if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE)
3241                 return;
3242
3243         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 1);
3244         if (pctx->errcode)
3245                 goto err;
3246
3247         return;
3248 err:
3249         pctx->blk = 0;
3250         pctx->num = 0;
3251         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3252         ctx->flags |= E2F_FLAG_ABORT;
3253 }
3254
3255 /*
3256  * This subroutine is called on each inode to account for all of the
3257  * blocks used by that inode.
3258  */
3259 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
3260                          char *block_buf, const struct ea_quota *ea_ibody_quota)
3261 {
3262         ext2_filsys fs = ctx->fs;
3263         struct process_block_struct pb;
3264         ext2_ino_t      ino = pctx->ino;
3265         struct ext2_inode *inode = pctx->inode;
3266         unsigned        bad_size = 0;
3267         int             dirty_inode = 0;
3268         int             extent_fs;
3269         int             inlinedata_fs;
3270         __u64           size;
3271         struct ea_quota ea_block_quota;
3272
3273         pb.ino = ino;
3274         pb.num_blocks = EXT2FS_B2C(ctx->fs,
3275                                    ea_ibody_quota ? ea_ibody_quota->blocks : 0);
3276         pb.last_block = ~0;
3277         pb.last_init_lblock = -1;
3278         pb.last_db_block = -1;
3279         pb.num_illegal_blocks = 0;
3280         pb.suppress = 0; pb.clear = 0;
3281         pb.fragmented = 0;
3282         pb.compressed = 0;
3283         pb.previous_block = 0;
3284         pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
3285         pb.is_reg = LINUX_S_ISREG(inode->i_mode);
3286         pb.max_blocks = 1U << (31 - fs->super->s_log_block_size);
3287         pb.inode = inode;
3288         pb.pctx = pctx;
3289         pb.ctx = ctx;
3290         pb.inode_modified = 0;
3291         pb.eti.force_rebuild = 0;
3292         pctx->ino = ino;
3293         pctx->errcode = 0;
3294
3295         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
3296         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
3297
3298         if (check_ext_attr(ctx, pctx, block_buf, &ea_block_quota)) {
3299                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3300                         goto out;
3301                 pb.num_blocks += EXT2FS_B2C(ctx->fs, ea_block_quota.blocks);
3302         }
3303
3304         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL))
3305                 check_blocks_inline_data(ctx, pctx, &pb);
3306         else if (ext2fs_inode_has_valid_blocks2(fs, inode)) {
3307                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL))
3308                         check_blocks_extents(ctx, pctx, &pb);
3309                 else {
3310                         int flags;
3311                         /*
3312                          * If we've modified the inode, write it out before
3313                          * iterate() tries to use it.
3314                          */
3315                         if (dirty_inode) {
3316                                 e2fsck_write_inode(ctx, ino, inode,
3317                                                    "check_blocks");
3318                                 dirty_inode = 0;
3319                         }
3320                         flags = fs->flags;
3321                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3322                         pctx->errcode = ext2fs_block_iterate3(fs, ino,
3323                                                 pb.is_dir ? BLOCK_FLAG_HOLE : 0,
3324                                                 block_buf, process_block, &pb);
3325                         /*
3326                          * We do not have uninitialized extents in non extent
3327                          * files.
3328                          */
3329                         pb.last_init_lblock = pb.last_block;
3330                         /*
3331                          * If iterate() changed a block mapping, we have to
3332                          * re-read the inode.  If we decide to clear the
3333                          * inode after clearing some stuff, we'll re-write the
3334                          * bad mappings into the inode!
3335                          */
3336                         if (pb.inode_modified)
3337                                 e2fsck_read_inode(ctx, ino, inode,
3338                                                   "check_blocks");
3339                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3340                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3341
3342                         if (ctx->options & E2F_OPT_CONVERT_BMAP) {
3343 #ifdef DEBUG
3344                                 printf("bmap rebuild ino=%d\n", ino);
3345 #endif
3346                                 if (!LINUX_S_ISDIR(inode->i_mode) ||
3347                                     !e2fsck_dir_will_be_rehashed(ctx, ino))
3348                                         e2fsck_rebuild_extents_later(ctx, ino);
3349                         }
3350                 }
3351         }
3352         end_problem_latch(ctx, PR_LATCH_BLOCK);
3353         end_problem_latch(ctx, PR_LATCH_TOOBIG);
3354         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3355                 goto out;
3356         if (pctx->errcode)
3357                 fix_problem(ctx, PR_1_BLOCK_ITERATE, pctx);
3358
3359         if (pb.fragmented && pb.num_blocks < fs->super->s_blocks_per_group) {
3360                 if (LINUX_S_ISDIR(inode->i_mode))
3361                         ctx->fs_fragmented_dir++;
3362                 else
3363                         ctx->fs_fragmented++;
3364         }
3365
3366         if (pb.clear) {
3367                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3368                                    "check_blocks");
3369                 return;
3370         }
3371
3372         if (inode->i_flags & EXT2_INDEX_FL) {
3373                 if (handle_htree(ctx, pctx, ino, inode, block_buf)) {
3374                         inode->i_flags &= ~EXT2_INDEX_FL;
3375                         dirty_inode++;
3376                 } else {
3377                         e2fsck_add_dx_dir(ctx, ino, pb.last_block+1);
3378                 }
3379         }
3380
3381         if (!pb.num_blocks && pb.is_dir &&
3382             !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
3383                 if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) {
3384                         e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks");
3385                         ctx->fs_directory_count--;
3386                         return;
3387                 }
3388         }
3389
3390         if (ino != quota_type2inum(PRJQUOTA, fs->super) &&
3391             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super)) &&
3392             !(inode->i_flags & EXT4_EA_INODE_FL)) {
3393                 quota_data_add(ctx->qctx, (struct ext2_inode_large *) inode,
3394                                ino,
3395                                pb.num_blocks * EXT2_CLUSTER_SIZE(fs->super));
3396                 quota_data_inodes(ctx->qctx, (struct ext2_inode_large *) inode,
3397                                   ino, (ea_ibody_quota ?
3398                                         ea_ibody_quota->inodes : 0) +
3399                                                 ea_block_quota.inodes + 1);
3400         }
3401
3402         if (!ext2fs_has_feature_huge_file(fs->super) ||
3403             !(inode->i_flags & EXT4_HUGE_FILE_FL))
3404                 pb.num_blocks *= (fs->blocksize / 512);
3405         pb.num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
3406 #if 0
3407         printf("inode %u, i_size = %u, last_block = %llu, i_blocks=%llu, num_blocks = %llu\n",
3408                ino, inode->i_size, pb.last_block, ext2fs_inode_i_blocks(fs, inode),
3409                pb.num_blocks);
3410 #endif
3411         if (pb.is_dir) {
3412                 unsigned nblock = inode->i_size >> EXT2_BLOCK_SIZE_BITS(fs->super);
3413                 if (inode->i_flags & EXT4_INLINE_DATA_FL) {
3414                         int flags;
3415                         size_t sz = 0;
3416                         errcode_t err;
3417
3418                         flags = ctx->fs->flags;
3419                         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3420                         err = ext2fs_inline_data_size(ctx->fs, pctx->ino,
3421                                                       &sz);
3422                         ctx->fs->flags = (flags &
3423                                           EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3424                                          (ctx->fs->flags &
3425                                           ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3426                         if (err || sz != inode->i_size) {
3427                                 bad_size = 7;
3428                                 pctx->num = sz;
3429                         }
3430                 } else if (inode->i_size & (fs->blocksize - 1))
3431                         bad_size = 5;
3432                 else if (nblock > (pb.last_block + 1))
3433                         bad_size = 1;
3434                 else if (nblock < (pb.last_block + 1)) {
3435                         if (((pb.last_block + 1) - nblock) >
3436                             fs->super->s_prealloc_dir_blocks)
3437                                 bad_size = 2;
3438                 }
3439         } else {
3440                 e2_blkcnt_t blkpg = ctx->blocks_per_page;
3441
3442                 size = EXT2_I_SIZE(inode);
3443                 if ((pb.last_init_lblock >= 0) &&
3444                     /* allow allocated blocks to end of PAGE_SIZE */
3445                     (size < (__u64)pb.last_init_lblock * fs->blocksize) &&
3446                     (pb.last_init_lblock / blkpg * blkpg != pb.last_init_lblock ||
3447                      size < (__u64)(pb.last_init_lblock & ~(blkpg-1)) *
3448                      fs->blocksize))
3449                         bad_size = 3;
3450                 else if (!(extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3451                          size > ext2_max_sizes[fs->super->s_log_block_size])
3452                         /* too big for a direct/indirect-mapped file */
3453                         bad_size = 4;
3454                 else if ((extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3455                          size >
3456                          ((1ULL << (32 + EXT2_BLOCK_SIZE_BITS(fs->super))) - 1))
3457                         /* too big for an extent-based file - 32bit ee_block */
3458                         bad_size = 6;
3459         }
3460         /* i_size for symlinks is checked elsewhere */
3461         if (bad_size && !LINUX_S_ISLNK(inode->i_mode)) {
3462                 /* Did inline_data set pctx->num earlier? */
3463                 if (bad_size != 7)
3464                         pctx->num = (pb.last_block + 1) * fs->blocksize;
3465                 pctx->group = bad_size;
3466                 if (fix_problem(ctx, PR_1_BAD_I_SIZE, pctx)) {
3467                         if (LINUX_S_ISDIR(inode->i_mode))
3468                                 pctx->num &= 0xFFFFFFFFULL;
3469                         ext2fs_inode_size_set(fs, inode, pctx->num);
3470                         if (EXT2_I_SIZE(inode) == 0 &&
3471                             (inode->i_flags & EXT4_INLINE_DATA_FL)) {
3472                                 memset(inode->i_block, 0,
3473                                        sizeof(inode->i_block));
3474                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
3475                         }
3476                         dirty_inode++;
3477                 }
3478                 pctx->num = 0;
3479         }
3480         if (LINUX_S_ISREG(inode->i_mode) &&
3481             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
3482                 ctx->large_files++;
3483         if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
3484             ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) ||
3485              (ext2fs_has_feature_huge_file(fs->super) &&
3486               (inode->i_flags & EXT4_HUGE_FILE_FL) &&
3487               (inode->osd2.linux2.l_i_blocks_hi != 0)))) {
3488                 pctx->num = pb.num_blocks;
3489                 if (fix_problem(ctx, PR_1_BAD_I_BLOCKS, pctx)) {
3490                         inode->i_blocks = pb.num_blocks;
3491                         inode->osd2.linux2.l_i_blocks_hi = pb.num_blocks >> 32;
3492                         dirty_inode++;
3493                 }
3494                 pctx->num = 0;
3495         }
3496
3497         /*
3498          * The kernel gets mad if we ask it to allocate bigalloc clusters to
3499          * a block mapped file, so rebuild it as an extent file.  We can skip
3500          * symlinks because they're never rewritten.
3501          */
3502         if (ext2fs_has_feature_bigalloc(fs->super) &&
3503             (LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode)) &&
3504             ext2fs_inode_data_blocks2(fs, inode) > 0 &&
3505             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INO(fs->super)) &&
3506             !(inode->i_flags & (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)) &&
3507             fix_problem(ctx, PR_1_NO_BIGALLOC_BLOCKMAP_FILES, pctx)) {
3508                 pctx->errcode = e2fsck_rebuild_extents_later(ctx, ino);
3509                 if (pctx->errcode)
3510                         goto out;
3511         }
3512
3513         if (ctx->dirs_to_hash && pb.is_dir &&
3514             !(ctx->lost_and_found && ctx->lost_and_found == ino) &&
3515             !(inode->i_flags & EXT2_INDEX_FL) &&
3516             ((inode->i_size / fs->blocksize) >= 3))
3517                 e2fsck_rehash_dir_later(ctx, ino);
3518
3519 out:
3520         if (dirty_inode)
3521                 e2fsck_write_inode(ctx, ino, inode, "check_blocks");
3522 }
3523
3524 #if 0
3525 /*
3526  * Helper function called by process block when an illegal block is
3527  * found.  It returns a description about why the block is illegal
3528  */
3529 static char *describe_illegal_block(ext2_filsys fs, blk64_t block)
3530 {
3531         blk64_t super;
3532         int     i;
3533         static char     problem[80];
3534
3535         super = fs->super->s_first_data_block;
3536         strcpy(problem, "PROGRAMMING ERROR: Unknown reason for illegal block");
3537         if (block < super) {
3538                 sprintf(problem, "< FIRSTBLOCK (%u)", super);
3539                 return(problem);
3540         } else if (block >= ext2fs_blocks_count(fs->super)) {
3541                 sprintf(problem, "> BLOCKS (%u)", ext2fs_blocks_count(fs->super));
3542                 return(problem);
3543         }
3544         for (i = 0; i < fs->group_desc_count; i++) {
3545                 if (block == super) {
3546                         sprintf(problem, "is the superblock in group %d", i);
3547                         break;
3548                 }
3549                 if (block > super &&
3550                     block <= (super + fs->desc_blocks)) {
3551                         sprintf(problem, "is in the group descriptors "
3552                                 "of group %d", i);
3553                         break;
3554                 }
3555                 if (block == ext2fs_block_bitmap_loc(fs, i)) {
3556                         sprintf(problem, "is the block bitmap of group %d", i);
3557                         break;
3558                 }
3559                 if (block == ext2fs_inode_bitmap_loc(fs, i)) {
3560                         sprintf(problem, "is the inode bitmap of group %d", i);
3561                         break;
3562                 }
3563                 if (block >= ext2fs_inode_table_loc(fs, i) &&
3564                     (block < ext2fs_inode_table_loc(fs, i)
3565                      + fs->inode_blocks_per_group)) {
3566                         sprintf(problem, "is in the inode table of group %d",
3567                                 i);
3568                         break;
3569                 }
3570                 super += fs->super->s_blocks_per_group;
3571         }
3572         return(problem);
3573 }
3574 #endif
3575
3576 /*
3577  * This is a helper function for check_blocks().
3578  */
3579 static int process_block(ext2_filsys fs,
3580                   blk64_t       *block_nr,
3581                   e2_blkcnt_t blockcnt,
3582                   blk64_t ref_block EXT2FS_ATTR((unused)),
3583                   int ref_offset EXT2FS_ATTR((unused)),
3584                   void *priv_data)
3585 {
3586         struct process_block_struct *p;
3587         struct problem_context *pctx;
3588         blk64_t blk = *block_nr;
3589         int     ret_code = 0;
3590         problem_t       problem = 0;
3591         e2fsck_t        ctx;
3592
3593         p = (struct process_block_struct *) priv_data;
3594         pctx = p->pctx;
3595         ctx = p->ctx;
3596
3597         /*
3598          * For a directory, add logical block zero for processing even if it's
3599          * not mapped or we'll be perennially stuck with broken "." and ".."
3600          * entries.
3601          */
3602         if (p->is_dir && blockcnt == 0 && blk == 0) {
3603                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino, 0, 0);
3604                 if (pctx->errcode) {
3605                         pctx->blk = blk;
3606                         pctx->num = blockcnt;
3607                         goto failed_add_dir_block;
3608                 }
3609                 p->last_db_block++;
3610         }
3611
3612         if (blk == 0)
3613                 return 0;
3614
3615 #if 0
3616         printf("Process_block, inode %lu, block %u, #%d\n", p->ino, blk,
3617                blockcnt);
3618 #endif
3619
3620         /*
3621          * Simplistic fragmentation check.  We merely require that the
3622          * file be contiguous.  (Which can never be true for really
3623          * big files that are greater than a block group.)
3624          */
3625         if (p->previous_block && p->ino != EXT2_RESIZE_INO) {
3626                 if (p->previous_block+1 != blk) {
3627                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3628                                 char type = '?';
3629
3630                                 if (p->is_dir)
3631                                         type = 'd';
3632                                 else if (p->is_reg)
3633                                         type = 'f';
3634
3635                                 printf(_("%6lu(%c): expecting %6lu "
3636                                          "got phys %6lu (blkcnt %lld)\n"),
3637                                        (unsigned long) pctx->ino, type,
3638                                        (unsigned long) p->previous_block+1,
3639                                        (unsigned long) blk,
3640                                        blockcnt);
3641                         }
3642                         p->fragmented = 1;
3643                 }
3644         }
3645
3646         if (p->is_dir && blockcnt > (1 << (21 - fs->super->s_log_block_size)))
3647                 problem = PR_1_TOOBIG_DIR;
3648         if (p->is_reg && p->num_blocks+1 >= p->max_blocks)
3649                 problem = PR_1_TOOBIG_REG;
3650         if (!p->is_dir && !p->is_reg && blockcnt > 0)
3651                 problem = PR_1_TOOBIG_SYMLINK;
3652
3653         if (blk < fs->super->s_first_data_block ||
3654             blk >= ext2fs_blocks_count(fs->super))
3655                 problem = PR_1_ILLEGAL_BLOCK_NUM;
3656
3657         /*
3658          * If this IND/DIND/TIND block is squatting atop some critical metadata
3659          * (group descriptors, superblock, bitmap, inode table), any write to
3660          * "fix" mapping problems will destroy the metadata.  We'll let pass 1b
3661          * fix that and restart fsck.
3662          */
3663         if (blockcnt < 0 &&
3664             p->ino != EXT2_RESIZE_INO &&
3665             blk < ctx->fs->super->s_blocks_count &&
3666             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk)) {
3667                 pctx->blk = blk;
3668                 fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx);
3669                 if ((ctx->options & E2F_OPT_NO) == 0)
3670                         ctx->flags |= E2F_FLAG_RESTART_LATER;
3671         }
3672
3673         if (problem) {
3674                 p->num_illegal_blocks++;
3675                 /*
3676                  * A bit of subterfuge here -- we're trying to fix a block
3677                  * mapping, but the IND/DIND/TIND block could have collided
3678                  * with some critical metadata.  So, fix the in-core mapping so
3679                  * iterate won't go insane, but return 0 instead of
3680                  * BLOCK_CHANGED so that it won't write the remapping out to
3681                  * our multiply linked block.
3682                  *
3683                  * Even if we previously determined that an *IND block
3684                  * conflicts with critical metadata, we must still try to
3685                  * iterate the *IND block as if it is an *IND block to find and
3686                  * mark the blocks it points to.  Better to be overly cautious
3687                  * with the used_blocks map so that we don't move the *IND
3688                  * block to a block that's really in use!
3689                  */
3690                 if (p->ino != EXT2_RESIZE_INO &&
3691                     ref_block != 0 &&
3692                     ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3693                                               ref_block)) {
3694                         *block_nr = 0;
3695                         return 0;
3696                 }
3697                 if (!p->suppress && (p->num_illegal_blocks % 12) == 0) {
3698                         if (fix_problem(ctx, PR_1_TOO_MANY_BAD_BLOCKS, pctx)) {
3699                                 p->clear = 1;
3700                                 return BLOCK_ABORT;
3701                         }
3702                         if (fix_problem(ctx, PR_1_SUPPRESS_MESSAGES, pctx)) {
3703                                 p->suppress = 1;
3704                                 set_latch_flags(PR_LATCH_BLOCK,
3705                                                 PRL_SUPPRESS, 0);
3706                         }
3707                 }
3708                 pctx->blk = blk;
3709                 pctx->blkcount = blockcnt;
3710                 if (fix_problem(ctx, problem, pctx)) {
3711                         blk = *block_nr = 0;
3712                         ret_code = BLOCK_CHANGED;
3713                         p->inode_modified = 1;
3714                         /*
3715                          * If the directory block is too big and is beyond the
3716                          * end of the FS, don't bother trying to add it for
3717                          * processing -- the kernel would never have created a
3718                          * directory this large, and we risk an ENOMEM abort.
3719                          * In any case, the toobig handler for extent-based
3720                          * directories also doesn't feed toobig blocks to
3721                          * pass 2.
3722                          */
3723                         if (problem == PR_1_TOOBIG_DIR)
3724                                 return ret_code;
3725                         goto mark_dir;
3726                 } else
3727                         return 0;
3728         }
3729
3730         if (p->ino == EXT2_RESIZE_INO) {
3731                 /*
3732                  * The resize inode has already be sanity checked
3733                  * during pass #0 (the superblock checks).  All we
3734                  * have to do is mark the double indirect block as
3735                  * being in use; all of the other blocks are handled
3736                  * by mark_table_blocks()).
3737                  */
3738                 if (blockcnt == BLOCK_COUNT_DIND)
3739                         mark_block_used(ctx, blk);
3740                 p->num_blocks++;
3741         } else if (!(ctx->fs->cluster_ratio_bits &&
3742                      p->previous_block &&
3743                      (EXT2FS_B2C(ctx->fs, blk) ==
3744                       EXT2FS_B2C(ctx->fs, p->previous_block)) &&
3745                      (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
3746                      ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
3747                 mark_block_used(ctx, blk);
3748                 p->num_blocks++;
3749         } else if (has_unaligned_cluster_map(ctx, p->previous_block,
3750                                              p->last_block, blk, blockcnt)) {
3751                 pctx->blk = blockcnt;
3752                 pctx->blk2 = blk;
3753                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3754                 mark_block_used(ctx, blk);
3755                 mark_block_used(ctx, blk);
3756         }
3757         if (blockcnt >= 0)
3758                 p->last_block = blockcnt;
3759         p->previous_block = blk;
3760 mark_dir:
3761         if (p->is_dir && (blockcnt >= 0)) {
3762                 while (++p->last_db_block < blockcnt) {
3763                         pctx->errcode = ext2fs_add_dir_block2(fs->dblist,
3764                                                               p->ino, 0,
3765                                                               p->last_db_block);
3766                         if (pctx->errcode) {
3767                                 pctx->blk = 0;
3768                                 pctx->num = p->last_db_block;
3769                                 goto failed_add_dir_block;
3770                         }
3771                 }
3772                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino,
3773                                                       blk, blockcnt);
3774                 if (pctx->errcode) {
3775                         pctx->blk = blk;
3776                         pctx->num = blockcnt;
3777                 failed_add_dir_block:
3778                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3779                         /* Should never get here */
3780                         ctx->flags |= E2F_FLAG_ABORT;
3781                         return BLOCK_ABORT;
3782                 }
3783         }
3784         return ret_code;
3785 }
3786
3787 static int process_bad_block(ext2_filsys fs,
3788                       blk64_t *block_nr,
3789                       e2_blkcnt_t blockcnt,
3790                       blk64_t ref_block EXT2FS_ATTR((unused)),
3791                       int ref_offset EXT2FS_ATTR((unused)),
3792                       void *priv_data)
3793 {
3794         struct process_block_struct *p;
3795         blk64_t         blk = *block_nr;
3796         blk64_t         first_block;
3797         dgrp_t          i;
3798         struct problem_context *pctx;
3799         e2fsck_t        ctx;
3800
3801         if (!blk)
3802                 return 0;
3803
3804         p = (struct process_block_struct *) priv_data;
3805         ctx = p->ctx;
3806         pctx = p->pctx;
3807
3808         pctx->ino = EXT2_BAD_INO;
3809         pctx->blk = blk;
3810         pctx->blkcount = blockcnt;
3811
3812         if ((blk < fs->super->s_first_data_block) ||
3813             (blk >= ext2fs_blocks_count(fs->super))) {
3814                 if (fix_problem(ctx, PR_1_BB_ILLEGAL_BLOCK_NUM, pctx)) {
3815                         *block_nr = 0;
3816                         return BLOCK_CHANGED;
3817                 } else
3818                         return 0;
3819         }
3820
3821         if (blockcnt < 0) {
3822                 if (ext2fs_test_block_bitmap2(p->fs_meta_blocks, blk)) {
3823                         p->bbcheck = 1;
3824                         if (fix_problem(ctx, PR_1_BB_FS_BLOCK, pctx)) {
3825                                 *block_nr = 0;
3826                                 return BLOCK_CHANGED;
3827                         }
3828                 } else if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3829                                                     blk)) {
3830                         p->bbcheck = 1;
3831                         if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK,
3832                                         pctx)) {
3833                                 *block_nr = 0;
3834                                 return BLOCK_CHANGED;
3835                         }
3836                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3837                                 return BLOCK_ABORT;
3838                 } else
3839                         mark_block_used(ctx, blk);
3840                 return 0;
3841         }
3842 #if 0
3843         printf ("DEBUG: Marking %u as bad.\n", blk);
3844 #endif
3845         ctx->fs_badblocks_count++;
3846         /*
3847          * If the block is not used, then mark it as used and return.
3848          * If it is already marked as found, this must mean that
3849          * there's an overlap between the filesystem table blocks
3850          * (bitmaps and inode table) and the bad block list.
3851          */
3852         if (!ext2fs_test_block_bitmap2(ctx->block_found_map, blk)) {
3853                 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
3854                 return 0;
3855         }
3856         /*
3857          * Try to find the where the filesystem block was used...
3858          */
3859         first_block = fs->super->s_first_data_block;
3860
3861         for (i = 0; i < fs->group_desc_count; i++ ) {
3862                 pctx->group = i;
3863                 pctx->blk = blk;
3864                 if (!ext2fs_bg_has_super(fs, i))
3865                         goto skip_super;
3866                 if (blk == first_block) {
3867                         if (i == 0) {
3868                                 if (fix_problem(ctx,
3869                                                 PR_1_BAD_PRIMARY_SUPERBLOCK,
3870                                                 pctx)) {
3871                                         *block_nr = 0;
3872                                         return BLOCK_CHANGED;
3873                                 }
3874                                 return 0;
3875                         }
3876                         fix_problem(ctx, PR_1_BAD_SUPERBLOCK, pctx);
3877                         return 0;
3878                 }
3879                 if ((blk > first_block) &&
3880                     (blk <= first_block + fs->desc_blocks)) {
3881                         if (i == 0) {
3882                                 pctx->blk = *block_nr;
3883                                 if (fix_problem(ctx,
3884                         PR_1_BAD_PRIMARY_GROUP_DESCRIPTOR, pctx)) {
3885                                         *block_nr = 0;
3886                                         return BLOCK_CHANGED;
3887                                 }
3888                                 return 0;
3889                         }
3890                         fix_problem(ctx, PR_1_BAD_GROUP_DESCRIPTORS, pctx);
3891                         return 0;
3892                 }
3893         skip_super:
3894                 if (blk == ext2fs_block_bitmap_loc(fs, i)) {
3895                         if (fix_problem(ctx, PR_1_BB_BAD_BLOCK, pctx)) {
3896                                 ctx->invalid_block_bitmap_flag[i]++;
3897                                 ctx->invalid_bitmaps++;
3898                         }
3899                         return 0;
3900                 }
3901                 if (blk == ext2fs_inode_bitmap_loc(fs, i)) {
3902                         if (fix_problem(ctx, PR_1_IB_BAD_BLOCK, pctx)) {
3903                                 ctx->invalid_inode_bitmap_flag[i]++;
3904                                 ctx->invalid_bitmaps++;
3905                         }
3906                         return 0;
3907                 }
3908                 if ((blk >= ext2fs_inode_table_loc(fs, i)) &&
3909                     (blk < (ext2fs_inode_table_loc(fs, i) +
3910                             fs->inode_blocks_per_group))) {
3911                         /*
3912                          * If there are bad blocks in the inode table,
3913                          * the inode scan code will try to do
3914                          * something reasonable automatically.
3915                          */
3916                         return 0;
3917                 }
3918                 first_block += fs->super->s_blocks_per_group;
3919         }
3920         /*
3921          * If we've gotten to this point, then the only
3922          * possibility is that the bad block inode meta data
3923          * is using a bad block.
3924          */
3925         if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) ||
3926             (blk == p->inode->i_block[EXT2_DIND_BLOCK]) ||
3927             (blk == p->inode->i_block[EXT2_TIND_BLOCK])) {
3928                 p->bbcheck = 1;
3929                 if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, pctx)) {
3930                         *block_nr = 0;
3931                         return BLOCK_CHANGED;
3932                 }
3933                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3934                         return BLOCK_ABORT;
3935                 return 0;
3936         }
3937
3938         pctx->group = -1;
3939
3940         /* Warn user that the block wasn't claimed */
3941         fix_problem(ctx, PR_1_PROGERR_CLAIMED_BLOCK, pctx);
3942
3943         return 0;
3944 }
3945
3946 static void new_table_block(e2fsck_t ctx, blk64_t first_block, dgrp_t group,
3947                             const char *name, int num, blk64_t *new_block)
3948 {
3949         ext2_filsys fs = ctx->fs;
3950         dgrp_t          last_grp;
3951         blk64_t         old_block = *new_block;
3952         blk64_t         last_block;
3953         dgrp_t          flexbg;
3954         unsigned        flexbg_size;
3955         int             i, is_flexbg;
3956         char            *buf;
3957         struct problem_context  pctx;
3958
3959         clear_problem_context(&pctx);
3960
3961         pctx.group = group;
3962         pctx.blk = old_block;
3963         pctx.str = name;
3964
3965         /*
3966          * For flex_bg filesystems, first try to allocate the metadata
3967          * within the flex_bg, and if that fails then try finding the
3968          * space anywhere in the filesystem.
3969          */
3970         is_flexbg = ext2fs_has_feature_flex_bg(fs->super);
3971         if (is_flexbg) {
3972                 flexbg_size = 1 << fs->super->s_log_groups_per_flex;
3973                 flexbg = group / flexbg_size;
3974                 first_block = ext2fs_group_first_block2(fs,
3975                                                         flexbg_size * flexbg);
3976                 last_grp = group | (flexbg_size - 1);
3977                 if (last_grp >= fs->group_desc_count)
3978                         last_grp = fs->group_desc_count - 1;
3979                 last_block = ext2fs_group_last_block2(fs, last_grp);
3980         } else
3981                 last_block = ext2fs_group_last_block2(fs, group);
3982         pctx.errcode = ext2fs_get_free_blocks2(fs, first_block, last_block,
3983                                                num, ctx->block_found_map,
3984                                                new_block);
3985         if (is_flexbg && (pctx.errcode == EXT2_ET_BLOCK_ALLOC_FAIL))
3986                 pctx.errcode = ext2fs_get_free_blocks2(fs,
3987                                 fs->super->s_first_data_block,
3988                                 ext2fs_blocks_count(fs->super),
3989                                 num, ctx->block_found_map, new_block);
3990         if (pctx.errcode) {
3991                 pctx.num = num;
3992                 fix_problem(ctx, PR_1_RELOC_BLOCK_ALLOCATE, &pctx);
3993                 ext2fs_unmark_valid(fs);
3994                 ctx->flags |= E2F_FLAG_ABORT;
3995                 return;
3996         }
3997         pctx.errcode = ext2fs_get_mem(fs->blocksize, &buf);
3998         if (pctx.errcode) {
3999                 fix_problem(ctx, PR_1_RELOC_MEMORY_ALLOCATE, &pctx);
4000                 ext2fs_unmark_valid(fs);
4001                 ctx->flags |= E2F_FLAG_ABORT;
4002                 return;
4003         }
4004         ext2fs_mark_super_dirty(fs);
4005         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
4006         pctx.blk2 = *new_block;
4007         fix_problem(ctx, (old_block ? PR_1_RELOC_FROM_TO :
4008                           PR_1_RELOC_TO), &pctx);
4009         pctx.blk2 = 0;
4010         for (i = 0; i < num; i++) {
4011                 pctx.blk = i;
4012                 ext2fs_mark_block_bitmap2(ctx->block_found_map, (*new_block)+i);
4013                 if (old_block) {
4014                         pctx.errcode = io_channel_read_blk64(fs->io,
4015                                    old_block + i, 1, buf);
4016                         if (pctx.errcode)
4017                                 fix_problem(ctx, PR_1_RELOC_READ_ERR, &pctx);
4018                         pctx.blk = (*new_block) + i;
4019                         pctx.errcode = io_channel_write_blk64(fs->io, pctx.blk,
4020                                                               1, buf);
4021                 } else {
4022                         pctx.blk = (*new_block) + i;
4023                         pctx.errcode = ext2fs_zero_blocks2(fs, pctx.blk, 1,
4024                                                            NULL, NULL);
4025                 }
4026
4027                 if (pctx.errcode)
4028                         fix_problem(ctx, PR_1_RELOC_WRITE_ERR, &pctx);
4029         }
4030         ext2fs_free_mem(&buf);
4031 }
4032
4033 /*
4034  * This routine gets called at the end of pass 1 if bad blocks are
4035  * detected in the superblock, group descriptors, inode_bitmaps, or
4036  * block bitmaps.  At this point, all of the blocks have been mapped
4037  * out, so we can try to allocate new block(s) to replace the bad
4038  * blocks.
4039  */
4040 static void handle_fs_bad_blocks(e2fsck_t ctx)
4041 {
4042         ext2_filsys fs = ctx->fs;
4043         dgrp_t          i;
4044         blk64_t         first_block;
4045         blk64_t         new_blk;
4046
4047         for (i = 0; i < fs->group_desc_count; i++) {
4048                 first_block = ext2fs_group_first_block2(fs, i);
4049
4050                 if (ctx->invalid_block_bitmap_flag[i]) {
4051                         new_blk = ext2fs_block_bitmap_loc(fs, i);
4052                         new_table_block(ctx, first_block, i, _("block bitmap"),
4053                                         1, &new_blk);
4054                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
4055                 }
4056                 if (ctx->invalid_inode_bitmap_flag[i]) {
4057                         new_blk = ext2fs_inode_bitmap_loc(fs, i);
4058                         new_table_block(ctx, first_block, i, _("inode bitmap"),
4059                                         1, &new_blk);
4060                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
4061                 }
4062                 if (ctx->invalid_inode_table_flag[i]) {
4063                         new_blk = ext2fs_inode_table_loc(fs, i);
4064                         new_table_block(ctx, first_block, i, _("inode table"),
4065                                         fs->inode_blocks_per_group,
4066                                         &new_blk);
4067                         ext2fs_inode_table_loc_set(fs, i, new_blk);
4068                         ctx->flags |= E2F_FLAG_RESTART;
4069                 }
4070         }
4071         ctx->invalid_bitmaps = 0;
4072 }
4073
4074 /*
4075  * This routine marks all blocks which are used by the superblock,
4076  * group descriptors, inode bitmaps, and block bitmaps.
4077  */
4078 static void mark_table_blocks(e2fsck_t ctx)
4079 {
4080         ext2_filsys fs = ctx->fs;
4081         blk64_t b;
4082         dgrp_t  i;
4083         unsigned int    j;
4084         struct problem_context pctx;
4085
4086         clear_problem_context(&pctx);
4087
4088         for (i = 0; i < fs->group_desc_count; i++) {
4089                 pctx.group = i;
4090
4091                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_found_map);
4092                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_metadata_map);
4093
4094                 /*
4095                  * Mark the blocks used for the inode table
4096                  */
4097                 if (ext2fs_inode_table_loc(fs, i)) {
4098                         for (j = 0, b = ext2fs_inode_table_loc(fs, i);
4099                              j < fs->inode_blocks_per_group;
4100                              j++, b++) {
4101                                 if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4102                                                              b)) {
4103                                         pctx.blk = b;
4104                                         if (!ctx->invalid_inode_table_flag[i] &&
4105                                             fix_problem(ctx,
4106                                                 PR_1_ITABLE_CONFLICT, &pctx)) {
4107                                                 ctx->invalid_inode_table_flag[i]++;
4108                                                 ctx->invalid_bitmaps++;
4109                                         }
4110                                 } else {
4111                                     ext2fs_mark_block_bitmap2(
4112                                                 ctx->block_found_map, b);
4113                                     ext2fs_mark_block_bitmap2(
4114                                                 ctx->block_metadata_map, b);
4115                                 }
4116                         }
4117                 }
4118
4119                 /*
4120                  * Mark block used for the block bitmap
4121                  */
4122                 if (ext2fs_block_bitmap_loc(fs, i)) {
4123                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4124                                      ext2fs_block_bitmap_loc(fs, i))) {
4125                                 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
4126                                 if (fix_problem(ctx, PR_1_BB_CONFLICT, &pctx)) {
4127                                         ctx->invalid_block_bitmap_flag[i]++;
4128                                         ctx->invalid_bitmaps++;
4129                                 }
4130                         } else {
4131                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4132                                      ext2fs_block_bitmap_loc(fs, i));
4133                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4134                                      ext2fs_block_bitmap_loc(fs, i));
4135                         }
4136                 }
4137                 /*
4138                  * Mark block used for the inode bitmap
4139                  */
4140                 if (ext2fs_inode_bitmap_loc(fs, i)) {
4141                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
4142                                      ext2fs_inode_bitmap_loc(fs, i))) {
4143                                 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
4144                                 if (fix_problem(ctx, PR_1_IB_CONFLICT, &pctx)) {
4145                                         ctx->invalid_inode_bitmap_flag[i]++;
4146                                         ctx->invalid_bitmaps++;
4147                                 }
4148                         } else {
4149                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
4150                                      ext2fs_inode_bitmap_loc(fs, i));
4151                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
4152                                      ext2fs_inode_bitmap_loc(fs, i));
4153                         }
4154                 }
4155         }
4156 }
4157
4158 /*
4159  * These subroutines short circuits ext2fs_get_blocks and
4160  * ext2fs_check_directory; we use them since we already have the inode
4161  * structure, so there's no point in letting the ext2fs library read
4162  * the inode again.
4163  */
4164 static errcode_t pass1_get_blocks(ext2_filsys fs, ext2_ino_t ino,
4165                                   blk_t *blocks)
4166 {
4167         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4168         int     i;
4169
4170         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4171                 return EXT2_ET_CALLBACK_NOTHANDLED;
4172
4173         for (i=0; i < EXT2_N_BLOCKS; i++)
4174                 blocks[i] = ctx->stashed_inode->i_block[i];
4175         return 0;
4176 }
4177
4178 static errcode_t pass1_read_inode(ext2_filsys fs, ext2_ino_t ino,
4179                                   struct ext2_inode *inode)
4180 {
4181         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4182
4183         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4184                 return EXT2_ET_CALLBACK_NOTHANDLED;
4185         *inode = *ctx->stashed_inode;
4186         return 0;
4187 }
4188
4189 static errcode_t pass1_write_inode(ext2_filsys fs, ext2_ino_t ino,
4190                             struct ext2_inode *inode)
4191 {
4192         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4193
4194         if ((ino == ctx->stashed_ino) && ctx->stashed_inode &&
4195                 (inode != ctx->stashed_inode))
4196                 *ctx->stashed_inode = *inode;
4197         return EXT2_ET_CALLBACK_NOTHANDLED;
4198 }
4199
4200 static errcode_t pass1_check_directory(ext2_filsys fs, ext2_ino_t ino)
4201 {
4202         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4203
4204         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
4205                 return EXT2_ET_CALLBACK_NOTHANDLED;
4206
4207         if (!LINUX_S_ISDIR(ctx->stashed_inode->i_mode))
4208                 return EXT2_ET_NO_DIRECTORY;
4209         return 0;
4210 }
4211
4212 static errcode_t e2fsck_get_alloc_block(ext2_filsys fs, blk64_t goal,
4213                                         blk64_t *ret)
4214 {
4215         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4216         errcode_t       retval;
4217         blk64_t         new_block;
4218
4219         if (ctx->block_found_map) {
4220                 retval = ext2fs_new_block2(fs, goal, ctx->block_found_map,
4221                                            &new_block);
4222                 if (retval)
4223                         return retval;
4224                 if (fs->block_map) {
4225                         ext2fs_mark_block_bitmap2(fs->block_map, new_block);
4226                         ext2fs_mark_bb_dirty(fs);
4227                 }
4228         } else {
4229                 if (!fs->block_map) {
4230                         retval = ext2fs_read_block_bitmap(fs);
4231                         if (retval)
4232                                 return retval;
4233                 }
4234
4235                 retval = ext2fs_new_block2(fs, goal, fs->block_map, &new_block);
4236                 if (retval)
4237                         return retval;
4238         }
4239
4240         *ret = new_block;
4241         return (0);
4242 }
4243
4244 static errcode_t e2fsck_new_range(ext2_filsys fs, int flags, blk64_t goal,
4245                                   blk64_t len, blk64_t *pblk, blk64_t *plen)
4246 {
4247         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4248         errcode_t       retval;
4249
4250         if (ctx->block_found_map)
4251                 return ext2fs_new_range(fs, flags, goal, len,
4252                                         ctx->block_found_map, pblk, plen);
4253
4254         if (!fs->block_map) {
4255                 retval = ext2fs_read_block_bitmap(fs);
4256                 if (retval)
4257                         return retval;
4258         }
4259
4260         return ext2fs_new_range(fs, flags, goal, len, fs->block_map,
4261                                 pblk, plen);
4262 }
4263
4264 static void e2fsck_block_alloc_stats(ext2_filsys fs, blk64_t blk, int inuse)
4265 {
4266         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4267
4268         /* Never free a critical metadata block */
4269         if (ctx->block_found_map &&
4270             ctx->block_metadata_map &&
4271             inuse < 0 &&
4272             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk))
4273                 return;
4274
4275         if (ctx->block_found_map) {
4276                 if (inuse > 0)
4277                         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4278                 else
4279                         ext2fs_unmark_block_bitmap2(ctx->block_found_map, blk);
4280         }
4281 }
4282
4283 static void e2fsck_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
4284                                            blk_t num, int inuse)
4285 {
4286         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4287
4288         /* Never free a critical metadata block */
4289         if (ctx->block_found_map &&
4290             ctx->block_metadata_map &&
4291             inuse < 0 &&
4292             ext2fs_test_block_bitmap_range2(ctx->block_metadata_map, blk, num))
4293                 return;
4294
4295         if (ctx->block_found_map) {
4296                 if (inuse > 0)
4297                         ext2fs_mark_block_bitmap_range2(ctx->block_found_map,
4298                                                         blk, num);
4299                 else
4300                         ext2fs_unmark_block_bitmap_range2(ctx->block_found_map,
4301                                                         blk, num);
4302         }
4303 }
4304
4305 void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts)
4306 {
4307         ext2_filsys fs = ctx->fs;
4308
4309         if (use_shortcuts) {
4310                 fs->get_blocks = pass1_get_blocks;
4311                 fs->check_directory = pass1_check_directory;
4312                 fs->read_inode = pass1_read_inode;
4313                 fs->write_inode = pass1_write_inode;
4314                 ctx->stashed_ino = 0;
4315         } else {
4316                 fs->get_blocks = 0;
4317                 fs->check_directory = 0;
4318                 fs->read_inode = 0;
4319                 fs->write_inode = 0;
4320         }
4321 }
4322
4323 void e2fsck_intercept_block_allocations(e2fsck_t ctx)
4324 {
4325         ext2fs_set_alloc_block_callback(ctx->fs, e2fsck_get_alloc_block, 0);
4326         ext2fs_set_block_alloc_stats_callback(ctx->fs,
4327                                                 e2fsck_block_alloc_stats, 0);
4328         ext2fs_set_new_range_callback(ctx->fs, e2fsck_new_range, NULL);
4329         ext2fs_set_block_alloc_stats_range_callback(ctx->fs,
4330                                         e2fsck_block_alloc_stats_range, NULL);
4331 }