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  *
  30  * Pass 1 is designed to stash away enough information so that the
  31  * other passes should not need to read in the inode information
  32  * during the normal course of a filesystem check.  (Althogh if an
  33  * inconsistency is detected, other passes may need to read in an
  34  * inode to fix it.)
  35  *
  36  * Note that pass 1B will be invoked if there are any duplicate blocks
  37  * found.
  38  */
  39
  40 #define _GNU_SOURCE 1 /* get strnlen() */
  41 #include "config.h"
  42 #include <string.h>
  43 #include <time.h>
  44 #ifdef HAVE_ERRNO_H
  45 #include <errno.h>
  46 #endif
  47
  48 #include "e2fsck.h"
  49 #include <ext2fs/ext2_ext_attr.h>
  50
  51 #include "problem.h"
  52
  53 #ifdef NO_INLINE_FUNCS
  54 #define _INLINE_
  55 #else
  56 #define _INLINE_ inline
  57 #endif
  58
  59 #undef DEBUG
  60
  61 static int process_block(ext2_filsys fs, blk64_t        *blocknr,
  62                          e2_blkcnt_t blockcnt, blk64_t ref_blk,
  63                          int ref_offset, void *priv_data);
  64 static int process_bad_block(ext2_filsys fs, blk64_t *block_nr,
  65                              e2_blkcnt_t blockcnt, blk64_t ref_blk,
  66                              int ref_offset, void *priv_data);
  67 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
  68                          char *block_buf);
  69 static void mark_table_blocks(e2fsck_t ctx);
  70 static void alloc_bb_map(e2fsck_t ctx);
  71 static void alloc_imagic_map(e2fsck_t ctx);
  72 static void mark_inode_bad(e2fsck_t ctx, ino_t ino);
  73 static void add_encrypted_dir(e2fsck_t ctx, ino_t ino);
  74 static void handle_fs_bad_blocks(e2fsck_t ctx);
  75 static void process_inodes(e2fsck_t ctx, char *block_buf);
  76 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b);
  77 static errcode_t scan_callback(ext2_filsys fs, ext2_inode_scan scan,
  78                                   dgrp_t group, void * priv_data);
  79 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
  80                                     char *block_buf, int adjust_sign);
  81 /* static char *describe_illegal_block(ext2_filsys fs, blk64_t block); */
  82
  83 struct process_block_struct {
  84         ext2_ino_t      ino;
  85         unsigned        is_dir:1, is_reg:1, clear:1, suppress:1,
  86                                 fragmented:1, compressed:1, bbcheck:1,
  87                                 inode_modified:1;
  88         blk64_t         num_blocks;
  89         blk64_t         max_blocks;
  90         e2_blkcnt_t     last_block;
  91         e2_blkcnt_t     last_init_lblock;
  92         e2_blkcnt_t     last_db_block;
  93         int             num_illegal_blocks;
  94         blk64_t         previous_block;
  95         struct ext2_inode *inode;
  96         struct problem_context *pctx;
  97         ext2fs_block_bitmap fs_meta_blocks;
  98         e2fsck_t        ctx;
  99         region_t        region;
 100         struct extent_tree_info eti;
 101 };
 102
 103 struct process_inode_block {
 104         ext2_ino_t ino;
 105         struct ext2_inode inode;
 106 };
 107
 108 struct scan_callback_struct {
 109         e2fsck_t        ctx;
 110         char            *block_buf;
 111 };
 112
 113 /*
 114  * For the inodes to process list.
 115  */
 116 static struct process_inode_block *inodes_to_process;
 117 static int process_inode_count;
 118
 119 static __u64 ext2_max_sizes[EXT2_MAX_BLOCK_LOG_SIZE -
 120                             EXT2_MIN_BLOCK_LOG_SIZE + 1];
 121
 122 /*
 123  * Free all memory allocated by pass1 in preparation for restarting
 124  * things.
 125  */
 126 static void unwind_pass1(ext2_filsys fs EXT2FS_ATTR((unused)))
 127 {
 128         ext2fs_free_mem(&inodes_to_process);
 129         inodes_to_process = 0;
 130 }
 131
 132 /*
 133  * Check to make sure a device inode is real.  Returns 1 if the device
 134  * checks out, 0 if not.
 135  *
 136  * Note: this routine is now also used to check FIFO's and Sockets,
 137  * since they have the same requirement; the i_block fields should be
 138  * zero.
 139  */
 140 int e2fsck_pass1_check_device_inode(ext2_filsys fs EXT2FS_ATTR((unused)),
 141                                     struct ext2_inode *inode)
 142 {
 143         int     i;
 144
 145         /*
 146          * If the index flag is set, then this is a bogus
 147          * device/fifo/socket
 148          */
 149         if (inode->i_flags & EXT2_INDEX_FL)
 150                 return 0;
 151
 152         /*
 153          * We should be able to do the test below all the time, but
 154          * because the kernel doesn't forcibly clear the device
 155          * inode's additional i_block fields, there are some rare
 156          * occasions when a legitimate device inode will have non-zero
 157          * additional i_block fields.  So for now, we only complain
 158          * when the immutable flag is set, which should never happen
 159          * for devices.  (And that's when the problem is caused, since
 160          * you can't set or clear immutable flags for devices.)  Once
 161          * the kernel has been fixed we can change this...
 162          */
 163         if (inode->i_flags & (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)) {
 164                 for (i=4; i < EXT2_N_BLOCKS; i++)
 165                         if (inode->i_block[i])
 166                                 return 0;
 167         }
 168         return 1;
 169 }
 170
 171 /*
 172  * Check to make sure a symlink inode is real.  Returns 1 if the symlink
 173  * checks out, 0 if not.
 174  */
 175 int e2fsck_pass1_check_symlink(ext2_filsys fs, ext2_ino_t ino,
 176                                struct ext2_inode *inode, char *buf)
 177 {
 178         unsigned int len;
 179         int i;
 180         blk64_t blocks;
 181         ext2_extent_handle_t    handle;
 182         struct ext2_extent_info info;
 183         struct ext2fs_extent    extent;
 184
 185         if ((inode->i_size_high || inode->i_size == 0) ||
 186             (inode->i_flags & EXT2_INDEX_FL))
 187                 return 0;
 188
 189         if (inode->i_flags & EXT4_EXTENTS_FL) {
 190                 if (inode->i_flags & EXT4_INLINE_DATA_FL)
 191                         return 0;
 192                 if (inode->i_size > fs->blocksize)
 193                         return 0;
 194                 if (ext2fs_extent_open2(fs, ino, inode, &handle))
 195                         return 0;
 196                 i = 0;
 197                 if (ext2fs_extent_get_info(handle, &info) ||
 198                     (info.num_entries != 1) ||
 199                     (info.max_depth != 0))
 200                         goto exit_extent;
 201                 if (ext2fs_extent_get(handle, EXT2_EXTENT_ROOT, &extent) ||
 202                     (extent.e_lblk != 0) ||
 203                     (extent.e_len != 1) ||
 204                     (extent.e_pblk < fs->super->s_first_data_block) ||
 205                     (extent.e_pblk >= ext2fs_blocks_count(fs->super)))
 206                         goto exit_extent;
 207                 i = 1;
 208         exit_extent:
 209                 ext2fs_extent_free(handle);
 210                 return i;
 211         }
 212
 213         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
 214                 size_t inline_size;
 215
 216                 if (ext2fs_inline_data_size(fs, ino, &inline_size))
 217                         return 0;
 218                 if (inode->i_size != inline_size)
 219                         return 0;
 220
 221                 return 1;
 222         }
 223
 224         blocks = ext2fs_inode_data_blocks2(fs, inode);
 225         if (blocks) {
 226                 if (inode->i_flags & EXT4_INLINE_DATA_FL)
 227                         return 0;
 228                 if ((inode->i_size >= fs->blocksize) ||
 229                     (blocks != fs->blocksize >> 9) ||
 230                     (inode->i_block[0] < fs->super->s_first_data_block) ||
 231                     (inode->i_block[0] >= ext2fs_blocks_count(fs->super)))
 232                         return 0;
 233
 234                 for (i = 1; i < EXT2_N_BLOCKS; i++)
 235                         if (inode->i_block[i])
 236                                 return 0;
 237
 238                 if (io_channel_read_blk64(fs->io, inode->i_block[0], 1, buf))
 239                         return 0;
 240
 241                 if (inode->i_flags & EXT4_ENCRYPT_FL) {
 242                         len = ext2fs_le32_to_cpu(*((__u32 *)buf)) + 4;
 243                 } else {
 244                         len = strnlen(buf, fs->blocksize);
 245                 }
 246                 if (len == fs->blocksize)
 247                         return 0;
 248         } else if (inode->i_flags & EXT4_INLINE_DATA_FL) {
 249                 char *inline_buf = NULL;
 250                 size_t inline_sz = 0;
 251
 252                 if (ext2fs_inline_data_size(fs, ino, &inline_sz))
 253                         return 0;
 254                 if (inode->i_size != inline_sz)
 255                         return 0;
 256                 if (ext2fs_get_mem(inline_sz + 1, &inline_buf))
 257                         return 0;
 258                 i = 0;
 259                 if (ext2fs_inline_data_get(fs, ino, inode, inline_buf, NULL))
 260                         goto exit_inline;
 261                 inline_buf[inline_sz] = 0;
 262                 len = strnlen(inline_buf, inline_sz);
 263                 if (len != inline_sz)
 264                         goto exit_inline;
 265                 i = 1;
 266 exit_inline:
 267                 ext2fs_free_mem(&inline_buf);
 268                 return i;
 269         } else {
 270                 if (inode->i_size >= sizeof(inode->i_block))
 271                         return 0;
 272
 273                 len = strnlen((char *)inode->i_block, sizeof(inode->i_block));
 274                 if (len == sizeof(inode->i_block))
 275                         return 0;
 276         }
 277         if (len != inode->i_size)
 278                 if ((inode->i_flags & EXT4_ENCRYPT_FL) == 0)
 279                         return 0;
 280         return 1;
 281 }
 282
 283 /*
 284  * If the extents or inlinedata flags are set on the inode, offer to clear 'em.
 285  */
 286 #define BAD_SPECIAL_FLAGS (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)
 287 static void check_extents_inlinedata(e2fsck_t ctx,
 288                                      struct problem_context *pctx)
 289 {
 290         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 291                 return;
 292
 293         if (!fix_problem(ctx, PR_1_SPECIAL_EXTENTS_IDATA, pctx))
 294                 return;
 295
 296         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 297         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 298 }
 299 #undef BAD_SPECIAL_FLAGS
 300
 301 /*
 302  * If the immutable (or append-only) flag is set on the inode, offer
 303  * to clear it.
 304  */
 305 #define BAD_SPECIAL_FLAGS (EXT2_IMMUTABLE_FL | EXT2_APPEND_FL)
 306 static void check_immutable(e2fsck_t ctx, struct problem_context *pctx)
 307 {
 308         if (!(pctx->inode->i_flags & BAD_SPECIAL_FLAGS))
 309                 return;
 310
 311         if (!fix_problem(ctx, PR_1_SET_IMMUTABLE, pctx))
 312                 return;
 313
 314         pctx->inode->i_flags &= ~BAD_SPECIAL_FLAGS;
 315         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 316 }
 317
 318 /*
 319  * If device, fifo or socket, check size is zero -- if not offer to
 320  * clear it
 321  */
 322 static void check_size(e2fsck_t ctx, struct problem_context *pctx)
 323 {
 324         struct ext2_inode *inode = pctx->inode;
 325
 326         if (EXT2_I_SIZE(inode) == 0)
 327                 return;
 328
 329         if (!fix_problem(ctx, PR_1_SET_NONZSIZE, pctx))
 330                 return;
 331
 332         ext2fs_inode_size_set(ctx->fs, inode, 0);
 333         e2fsck_write_inode(ctx, pctx->ino, pctx->inode, "pass1");
 334 }
 335
 336 static void check_ea_in_inode(e2fsck_t ctx, struct problem_context *pctx)
 337 {
 338         struct ext2_super_block *sb = ctx->fs->super;
 339         struct ext2_inode_large *inode;
 340         struct ext2_ext_attr_entry *entry;
 341         char *start, *header;
 342         unsigned int storage_size, remain;
 343         problem_t problem = 0;
 344         region_t region = 0;
 345
 346         inode = (struct ext2_inode_large *) pctx->inode;
 347         storage_size = EXT2_INODE_SIZE(ctx->fs->super) - EXT2_GOOD_OLD_INODE_SIZE -
 348                 inode->i_extra_isize;
 349         header = ((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 350                  inode->i_extra_isize;
 351         start = header + sizeof(__u32);
 352         entry = (struct ext2_ext_attr_entry *) start;
 353
 354         /* scan all entry's headers first */
 355
 356         /* take finish entry 0UL into account */
 357         remain = storage_size - sizeof(__u32);
 358
 359         region = region_create(0, storage_size);
 360         if (!region) {
 361                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
 362                 problem = 0;
 363                 ctx->flags |= E2F_FLAG_ABORT;
 364                 return;
 365         }
 366         if (region_allocate(region, 0, sizeof(__u32))) {
 367                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 368                 goto fix;
 369         }
 370
 371         while (remain >= sizeof(struct ext2_ext_attr_entry) &&
 372                !EXT2_EXT_IS_LAST_ENTRY(entry)) {
 373                 __u32 hash;
 374
 375                 if (region_allocate(region, (char *)entry - (char *)header,
 376                                     EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
 377                         problem = PR_1_INODE_EA_ALLOC_COLLISION;
 378                         goto fix;
 379                 }
 380
 381                 /* header eats this space */
 382                 remain -= sizeof(struct ext2_ext_attr_entry);
 383
 384                 /* is attribute name valid? */
 385                 if (EXT2_EXT_ATTR_SIZE(entry->e_name_len) > remain) {
 386                         pctx->num = entry->e_name_len;
 387                         problem = PR_1_ATTR_NAME_LEN;
 388                         goto fix;
 389                 }
 390
 391                 /* attribute len eats this space */
 392                 remain -= EXT2_EXT_ATTR_SIZE(entry->e_name_len);
 393
 394                 /* check value size */
 395                 if (entry->e_value_size > remain) {
 396                         pctx->num = entry->e_value_size;
 397                         problem = PR_1_ATTR_VALUE_SIZE;
 398                         goto fix;
 399                 }
 400
 401                 /* e_value_block must be 0 in inode's ea */
 402                 if (entry->e_value_block != 0) {
 403                         pctx->num = entry->e_value_block;
 404                         problem = PR_1_ATTR_VALUE_BLOCK;
 405                         goto fix;
 406                 }
 407
 408                 if (entry->e_value_size &&
 409                     region_allocate(region, sizeof(__u32) + entry->e_value_offs,
 410                                     EXT2_EXT_ATTR_SIZE(entry->e_value_size))) {
 411                         problem = PR_1_INODE_EA_ALLOC_COLLISION;
 412                         goto fix;
 413                 }
 414
 415                 hash = ext2fs_ext_attr_hash_entry(entry,
 416                                                   start + entry->e_value_offs);
 417
 418                 /* e_hash may be 0 in older inode's ea */
 419                 if (entry->e_hash != 0 && entry->e_hash != hash) {
 420                         pctx->num = entry->e_hash;
 421                         problem = PR_1_ATTR_HASH;
 422                         goto fix;
 423                 }
 424
 425                 remain -= entry->e_value_size;
 426
 427                 entry = EXT2_EXT_ATTR_NEXT(entry);
 428         }
 429
 430         if (region_allocate(region, (char *)entry - (char *)header,
 431                             sizeof(__u32))) {
 432                 problem = PR_1_INODE_EA_ALLOC_COLLISION;
 433                 goto fix;
 434         }
 435 fix:
 436         if (region)
 437                 region_free(region);
 438         /*
 439          * it seems like a corruption. it's very unlikely we could repair
 440          * EA(s) in automatic fashion -bzzz
 441          */
 442         if (problem == 0 || !fix_problem(ctx, problem, pctx))
 443                 return;
 444
 445         /* simply remove all possible EA(s) */
 446         *((__u32 *)header) = 0UL;
 447         e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 448                                 EXT2_INODE_SIZE(sb), "pass1");
 449 }
 450
 451 static void check_inode_extra_space(e2fsck_t ctx, struct problem_context *pctx)
 452 {
 453         struct ext2_super_block *sb = ctx->fs->super;
 454         struct ext2_inode_large *inode;
 455         __u32 *eamagic;
 456         int min, max;
 457
 458         inode = (struct ext2_inode_large *) pctx->inode;
 459         if (EXT2_INODE_SIZE(sb) == EXT2_GOOD_OLD_INODE_SIZE) {
 460                 /* this isn't large inode. so, nothing to check */
 461                 return;
 462         }
 463
 464 #if 0
 465         printf("inode #%u, i_extra_size %d\n", pctx->ino,
 466                         inode->i_extra_isize);
 467 #endif
 468         /* i_extra_isize must cover i_extra_isize + i_checksum_hi at least */
 469         min = sizeof(inode->i_extra_isize) + sizeof(inode->i_checksum_hi);
 470         max = EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE;
 471         /*
 472          * For now we will allow i_extra_isize to be 0, but really
 473          * implementations should never allow i_extra_isize to be 0
 474          */
 475         if (inode->i_extra_isize &&
 476             (inode->i_extra_isize < min || inode->i_extra_isize > max)) {
 477                 if (!fix_problem(ctx, PR_1_EXTRA_ISIZE, pctx))
 478                         return;
 479                 inode->i_extra_isize = min;
 480                 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 481                                         EXT2_INODE_SIZE(sb), "pass1");
 482                 return;
 483         }
 484
 485         /* check if there is no place for an EA header */
 486         if (inode->i_extra_isize >= max - sizeof(__u32))
 487                 return;
 488
 489         eamagic = (__u32 *) (((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 490                         inode->i_extra_isize);
 491         if (*eamagic == EXT2_EXT_ATTR_MAGIC) {
 492                 /* it seems inode has an extended attribute(s) in body */
 493                 check_ea_in_inode(ctx, pctx);
 494         }
 495 }
 496
 497 /*
 498  * Check to see if the inode might really be a directory, despite i_mode
 499  *
 500  * This is a lot of complexity for something for which I'm not really
 501  * convinced happens frequently in the wild.  If for any reason this
 502  * causes any problems, take this code out.
 503  * [tytso:20070331.0827EDT]
 504  */
 505 static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx,
 506                                 char *buf)
 507 {
 508         struct ext2_inode *inode = pctx->inode;
 509         struct ext2_dir_entry   *dirent;
 510         errcode_t               retval;
 511         blk64_t                 blk;
 512         unsigned int            i, rec_len, not_device = 0;
 513         int                     extent_fs;
 514         int                     inlinedata_fs;
 515
 516         /*
 517          * If the mode looks OK, we believe it.  If the first block in
 518          * the i_block array is 0, this cannot be a directory. If the
 519          * inode is extent-mapped, it is still the case that the latter
 520          * cannot be 0 - the magic number in the extent header would make
 521          * it nonzero.
 522          */
 523         if (LINUX_S_ISDIR(inode->i_mode) || LINUX_S_ISREG(inode->i_mode) ||
 524             LINUX_S_ISLNK(inode->i_mode) || inode->i_block[0] == 0)
 525                 return;
 526
 527         /*
 528          * Check the block numbers in the i_block array for validity:
 529          * zero blocks are skipped (but the first one cannot be zero -
 530          * see above), other blocks are checked against the first and
 531          * max data blocks (from the the superblock) and against the
 532          * block bitmap. Any invalid block found means this cannot be
 533          * a directory.
 534          *
 535          * If there are non-zero blocks past the fourth entry, then
 536          * this cannot be a device file: we remember that for the next
 537          * check.
 538          *
 539          * For extent mapped files, we don't do any sanity checking:
 540          * just try to get the phys block of logical block 0 and run
 541          * with it.
 542          *
 543          * For inline data files, we just try to get the size of inline
 544          * data.  If it's true, we will treat it as a directory.
 545          */
 546
 547         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
 548         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
 549         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL)) {
 550                 size_t size;
 551                 __u32 dotdot;
 552                 unsigned int rec_len;
 553                 struct ext2_dir_entry de;
 554
 555                 if (ext2fs_inline_data_size(ctx->fs, pctx->ino, &size))
 556                         return;
 557                 /*
 558                  * If the size isn't a multiple of 4, it's probably not a
 559                  * directory??
 560                  */
 561                 if (size & 3)
 562                         return;
 563                 /*
 564                  * If the first 10 bytes don't look like a directory entry,
 565                  * it's probably not a directory.
 566                  */
 567                 memcpy(&dotdot, inode->i_block, sizeof(dotdot));
 568                 memcpy(&de, ((char *)inode->i_block) + EXT4_INLINE_DATA_DOTDOT_SIZE,
 569                        EXT2_DIR_REC_LEN(0));
 570                 dotdot = ext2fs_le32_to_cpu(dotdot);
 571                 de.inode = ext2fs_le32_to_cpu(de.inode);
 572                 de.rec_len = ext2fs_le16_to_cpu(de.rec_len);
 573                 ext2fs_get_rec_len(ctx->fs, &de, &rec_len);
 574                 if (dotdot >= ctx->fs->super->s_inodes_count ||
 575                     (dotdot < EXT2_FIRST_INO(ctx->fs->super) &&
 576                      dotdot != EXT2_ROOT_INO) ||
 577                     de.inode >= ctx->fs->super->s_inodes_count ||
 578                     (de.inode < EXT2_FIRST_INO(ctx->fs->super) &&
 579                      de.inode != 0) ||
 580                     rec_len > EXT4_MIN_INLINE_DATA_SIZE -
 581                               EXT4_INLINE_DATA_DOTDOT_SIZE)
 582                         return;
 583                 /* device files never have a "system.data" entry */
 584                 goto isdir;
 585         } else if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) {
 586                 /* extent mapped */
 587                 if  (ext2fs_bmap2(ctx->fs, pctx->ino, inode, 0, 0, 0, 0,
 588                                  &blk))
 589                         return;
 590                 /* device files are never extent mapped */
 591                 not_device++;
 592         } else {
 593                 for (i=0; i < EXT2_N_BLOCKS; i++) {
 594                         blk = inode->i_block[i];
 595                         if (!blk)
 596                                 continue;
 597                         if (i >= 4)
 598                                 not_device++;
 599
 600                         if (blk < ctx->fs->super->s_first_data_block ||
 601                             blk >= ext2fs_blocks_count(ctx->fs->super) ||
 602                             ext2fs_fast_test_block_bitmap2(ctx->block_found_map,
 603                                                            blk))
 604                                 return; /* Invalid block, can't be dir */
 605                 }
 606                 blk = inode->i_block[0];
 607         }
 608
 609         /*
 610          * If the mode says this is a device file and the i_links_count field
 611          * is sane and we have not ruled it out as a device file previously,
 612          * we declare it a device file, not a directory.
 613          */
 614         if ((LINUX_S_ISCHR(inode->i_mode) || LINUX_S_ISBLK(inode->i_mode)) &&
 615             (inode->i_links_count == 1) && !not_device)
 616                 return;
 617
 618         /* read the first block */
 619         ehandler_operation(_("reading directory block"));
 620         retval = ext2fs_read_dir_block4(ctx->fs, blk, buf, 0, pctx->ino);
 621         ehandler_operation(0);
 622         if (retval)
 623                 return;
 624
 625         dirent = (struct ext2_dir_entry *) buf;
 626         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 627         if (retval)
 628                 return;
 629         if ((ext2fs_dirent_name_len(dirent) != 1) ||
 630             (dirent->name[0] != '.') ||
 631             (dirent->inode != pctx->ino) ||
 632             (rec_len < 12) ||
 633             (rec_len % 4) ||
 634             (rec_len >= ctx->fs->blocksize - 12))
 635                 return;
 636
 637         dirent = (struct ext2_dir_entry *) (buf + rec_len);
 638         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 639         if (retval)
 640                 return;
 641         if ((ext2fs_dirent_name_len(dirent) != 2) ||
 642             (dirent->name[0] != '.') ||
 643             (dirent->name[1] != '.') ||
 644             (rec_len < 12) ||
 645             (rec_len % 4))
 646                 return;
 647
 648 isdir:
 649         if (fix_problem(ctx, PR_1_TREAT_AS_DIRECTORY, pctx)) {
 650                 inode->i_mode = (inode->i_mode & 07777) | LINUX_S_IFDIR;
 651                 e2fsck_write_inode_full(ctx, pctx->ino, inode,
 652                                         EXT2_INODE_SIZE(ctx->fs->super),
 653                                         "check_is_really_dir");
 654         }
 655 }
 656
 657 void e2fsck_setup_tdb_icount(e2fsck_t ctx, int flags,
 658                              ext2_icount_t *ret)
 659 {
 660         unsigned int            threshold;
 661         ext2_ino_t              num_dirs;
 662         errcode_t               retval;
 663         char                    *tdb_dir;
 664         int                     enable;
 665
 666         *ret = 0;
 667
 668         profile_get_string(ctx->profile, "scratch_files", "directory", 0, 0,
 669                            &tdb_dir);
 670         profile_get_uint(ctx->profile, "scratch_files",
 671                          "numdirs_threshold", 0, 0, &threshold);
 672         profile_get_boolean(ctx->profile, "scratch_files",
 673                             "icount", 0, 1, &enable);
 674
 675         retval = ext2fs_get_num_dirs(ctx->fs, &num_dirs);
 676         if (retval)
 677                 num_dirs = 1024;        /* Guess */
 678
 679         if (!enable || !tdb_dir || access(tdb_dir, W_OK) ||
 680             (threshold && num_dirs <= threshold))
 681                 return;
 682
 683         retval = ext2fs_create_icount_tdb(ctx->fs, tdb_dir, flags, ret);
 684         if (retval)
 685                 *ret = 0;
 686 }
 687
 688 static errcode_t recheck_bad_inode_checksum(ext2_filsys fs, ext2_ino_t ino,
 689                                             e2fsck_t ctx,
 690                                             struct problem_context *pctx)
 691 {
 692         errcode_t retval;
 693         struct ext2_inode_large inode;
 694
 695         /*
 696          * Reread inode.  If we don't see checksum error, then this inode
 697          * has been fixed elsewhere.
 698          */
 699         ctx->stashed_ino = 0;
 700         retval = ext2fs_read_inode_full(fs, ino, (struct ext2_inode *)&inode,
 701                                         sizeof(inode));
 702         if (retval && retval != EXT2_ET_INODE_CSUM_INVALID)
 703                 return retval;
 704         if (!retval)
 705                 return 0;
 706
 707         /*
 708          * Checksum still doesn't match.  That implies that the inode passes
 709          * all the sanity checks, so maybe the checksum is simply corrupt.
 710          * See if the user will go for fixing that.
 711          */
 712         if (!fix_problem(ctx, PR_1_INODE_ONLY_CSUM_INVALID, pctx))
 713                 return 0;
 714
 715         retval = ext2fs_write_inode_full(fs, ino, (struct ext2_inode *)&inode,
 716                                          sizeof(inode));
 717         return retval;
 718 }
 719
 720 static void reserve_block_for_root_repair(e2fsck_t ctx)
 721 {
 722         blk64_t         blk = 0;
 723         errcode_t       err;
 724         ext2_filsys     fs = ctx->fs;
 725
 726         ctx->root_repair_block = 0;
 727         if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO))
 728                 return;
 729
 730         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 731         if (err)
 732                 return;
 733         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 734         ctx->root_repair_block = blk;
 735 }
 736
 737 static void reserve_block_for_lnf_repair(e2fsck_t ctx)
 738 {
 739         blk64_t         blk = 0;
 740         errcode_t       err;
 741         ext2_filsys     fs = ctx->fs;
 742         static const char name[] = "lost+found";
 743         ext2_ino_t      ino;
 744
 745         ctx->lnf_repair_block = 0;
 746         if (!ext2fs_lookup(fs, EXT2_ROOT_INO, name, sizeof(name)-1, 0, &ino))
 747                 return;
 748
 749         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 750         if (err)
 751                 return;
 752         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 753         ctx->lnf_repair_block = blk;
 754 }
 755
 756 static errcode_t get_inline_data_ea_size(ext2_filsys fs, ext2_ino_t ino,
 757                                          size_t *sz)
 758 {
 759         void *p;
 760         struct ext2_xattr_handle *handle;
 761         errcode_t retval;
 762
 763         retval = ext2fs_xattrs_open(fs, ino, &handle);
 764         if (retval)
 765                 return retval;
 766
 767         retval = ext2fs_xattrs_read(handle);
 768         if (retval)
 769                 goto err;
 770
 771         retval = ext2fs_xattr_get(handle, "system.data", &p, sz);
 772         if (retval)
 773                 goto err;
 774         ext2fs_free_mem(&p);
 775 err:
 776         (void) ext2fs_xattrs_close(&handle);
 777         return retval;
 778 }
 779
 780 static void finish_processing_inode(e2fsck_t ctx, ext2_ino_t ino,
 781                                     struct problem_context *pctx,
 782                                     int failed_csum)
 783 {
 784         if (!failed_csum)
 785                 return;
 786
 787         /*
 788          * If the inode failed the checksum and the user didn't
 789          * clear the inode, test the checksum again -- if it still
 790          * fails, ask the user if the checksum should be corrected.
 791          */
 792         pctx->errcode = recheck_bad_inode_checksum(ctx->fs, ino, ctx, pctx);
 793         if (pctx->errcode)
 794                 ctx->flags |= E2F_FLAG_ABORT;
 795 }
 796 #define FINISH_INODE_LOOP(ctx, ino, pctx, failed_csum) \
 797         do { \
 798                 finish_processing_inode((ctx), (ino), (pctx), (failed_csum)); \
 799                 if ((ctx)->flags & E2F_FLAG_ABORT) \
 800                         return; \
 801         } while (0)
 802
 803 static int could_be_block_map(ext2_filsys fs, struct ext2_inode *inode)
 804 {
 805         __u32 x;
 806         int i;
 807
 808         for (i = 0; i < EXT2_N_BLOCKS; i++) {
 809                 x = inode->i_block[i];
 810 #ifdef WORDS_BIGENDIAN
 811                 x = ext2fs_swab32(x);
 812 #endif
 813                 if (x >= ext2fs_blocks_count(fs->super))
 814                         return 0;
 815         }
 816
 817         return 1;
 818 }
 819
 820 /*
 821  * Figure out what to do with an inode that has both extents and inline data
 822  * inode flags set.  Returns -1 if we decide to erase the inode, 0 otherwise.
 823  */
 824 static int fix_inline_data_extents_file(e2fsck_t ctx,
 825                                         ext2_ino_t ino,
 826                                         struct ext2_inode *inode,
 827                                         int inode_size,
 828                                         struct problem_context *pctx)
 829 {
 830         size_t max_inline_ea_size;
 831         ext2_filsys fs = ctx->fs;
 832         int dirty = 0;
 833
 834         /* Both feature flags not set?  Just run the regular checks */
 835         if (!ext2fs_has_feature_extents(fs->super) &&
 836             !ext2fs_has_feature_inline_data(fs->super))
 837                 return 0;
 838
 839         /* Clear both flags if it's a special file */
 840         if (LINUX_S_ISCHR(inode->i_mode) ||
 841             LINUX_S_ISBLK(inode->i_mode) ||
 842             LINUX_S_ISFIFO(inode->i_mode) ||
 843             LINUX_S_ISSOCK(inode->i_mode)) {
 844                 check_extents_inlinedata(ctx, pctx);
 845                 return 0;
 846         }
 847
 848         /* If it looks like an extent tree, try to clear inlinedata */
 849         if (ext2fs_extent_header_verify(inode->i_block,
 850                                  sizeof(inode->i_block)) == 0 &&
 851             fix_problem(ctx, PR_1_CLEAR_INLINE_DATA_FOR_EXTENT, pctx)) {
 852                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
 853                 dirty = 1;
 854                 goto out;
 855         }
 856
 857         /* If it looks short enough to be inline data, try to clear extents */
 858         if (inode_size > EXT2_GOOD_OLD_INODE_SIZE)
 859                 max_inline_ea_size = inode_size -
 860                                      (EXT2_GOOD_OLD_INODE_SIZE +
 861                                       ((struct ext2_inode_large *)inode)->i_extra_isize);
 862         else
 863                 max_inline_ea_size = 0;
 864         if (EXT2_I_SIZE(inode) <
 865             EXT4_MIN_INLINE_DATA_SIZE + max_inline_ea_size &&
 866             fix_problem(ctx, PR_1_CLEAR_EXTENT_FOR_INLINE_DATA, pctx)) {
 867                 inode->i_flags &= ~EXT4_EXTENTS_FL;
 868                 dirty = 1;
 869                 goto out;
 870         }
 871
 872         /*
 873          * Too big for inline data, but no evidence of extent tree -
 874          * maybe it's a block map file?  If the mappings all look valid?
 875          */
 876         if (could_be_block_map(fs, inode) &&
 877             fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_FLAGS, pctx)) {
 878 #ifdef WORDS_BIGENDIAN
 879                 int i;
 880
 881                 for (i = 0; i < EXT2_N_BLOCKS; i++)
 882                         inode->i_block[i] = ext2fs_swab32(inode->i_block[i]);
 883 #endif
 884
 885                 inode->i_flags &= ~(EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL);
 886                 dirty = 1;
 887                 goto out;
 888         }
 889
 890         /* Oh well, just clear the busted inode. */
 891         if (fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_INODE, pctx)) {
 892                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
 893                 return -1;
 894         }
 895
 896 out:
 897         if (dirty)
 898                 e2fsck_write_inode(ctx, ino, inode, "pass1");
 899
 900         return 0;
 901 }
 902
 903 static void pass1_readahead(e2fsck_t ctx, dgrp_t *group, ext2_ino_t *next_ino)
 904 {
 905         ext2_ino_t inodes_in_group = 0, inodes_per_block, inodes_per_buffer;
 906         dgrp_t start = *group, grp;
 907         blk64_t blocks_to_read = 0;
 908         errcode_t err = EXT2_ET_INVALID_ARGUMENT;
 909
 910         if (ctx->readahead_kb == 0)
 911                 goto out;
 912
 913         /* Keep iterating groups until we have enough to readahead */
 914         inodes_per_block = EXT2_INODES_PER_BLOCK(ctx->fs->super);
 915         for (grp = start; grp < ctx->fs->group_desc_count; grp++) {
 916                 if (ext2fs_bg_flags_test(ctx->fs, grp, EXT2_BG_INODE_UNINIT))
 917                         continue;
 918                 inodes_in_group = ctx->fs->super->s_inodes_per_group -
 919                                         ext2fs_bg_itable_unused(ctx->fs, grp);
 920                 blocks_to_read += (inodes_in_group + inodes_per_block - 1) /
 921                                         inodes_per_block;
 922                 if (blocks_to_read * ctx->fs->blocksize >
 923                     ctx->readahead_kb * 1024)
 924                         break;
 925         }
 926
 927         err = e2fsck_readahead(ctx->fs, E2FSCK_READA_ITABLE, start,
 928                                grp - start + 1);
 929         if (err == EAGAIN) {
 930                 ctx->readahead_kb /= 2;
 931                 err = 0;
 932         }
 933
 934 out:
 935         if (err) {
 936                 /* Error; disable itable readahead */
 937                 *group = ctx->fs->group_desc_count;
 938                 *next_ino = ctx->fs->super->s_inodes_count;
 939         } else {
 940                 /*
 941                  * Don't do more readahead until we've reached the first inode
 942                  * of the last inode scan buffer block for the last group.
 943                  */
 944                 *group = grp + 1;
 945                 inodes_per_buffer = (ctx->inode_buffer_blocks ?
 946                                      ctx->inode_buffer_blocks :
 947                                      EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS) *
 948                                     ctx->fs->blocksize /
 949                                     EXT2_INODE_SIZE(ctx->fs->super);
 950                 inodes_in_group--;
 951                 *next_ino = inodes_in_group -
 952                             (inodes_in_group % inodes_per_buffer) + 1 +
 953                             (grp * ctx->fs->super->s_inodes_per_group);
 954         }
 955 }
 956
 957 /*
 958  * Check if the passed ino is one of the used superblock quota inodes.
 959  *
 960  * Before the quota inodes were journaled, older superblock quota inodes
 961  * were just regular files in the filesystem and not reserved inodes.  This
 962  * checks if the passed ino is one of the s_*_quota_inum superblock fields,
 963  * which may not always be the same as the EXT4_*_QUOTA_INO fields.
 964  */
 965 static int quota_inum_is_super(struct ext2_super_block *sb, ext2_ino_t ino)
 966 {
 967         enum quota_type qtype;
 968
 969         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
 970                 if (*quota_sb_inump(sb, qtype) == ino)
 971                         return 1;
 972
 973         return 0;
 974 }
 975
 976 /*
 977  * Check if the passed ino is one of the reserved quota inodes.
 978  * This checks if the inode number is one of the reserved EXT4_*_QUOTA_INO
 979  * inodes.  These inodes may or may not be in use by the quota feature.
 980  */
 981 static int quota_inum_is_reserved(ext2_filsys fs, ext2_ino_t ino)
 982 {
 983         enum quota_type qtype;
 984
 985         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
 986                 if (quota_type2inum(qtype, fs->super) == ino)
 987                         return 1;
 988
 989         return 0;
 990 }
 991
 992 void e2fsck_pass1(e2fsck_t ctx)
 993 {
 994         int     i;
 995         __u64   max_sizes;
 996         ext2_filsys fs = ctx->fs;
 997         ext2_ino_t      ino = 0;
 998         struct ext2_inode *inode = NULL;
 999         ext2_inode_scan scan = NULL;
1000         char            *block_buf = NULL;
1001 #ifdef RESOURCE_TRACK
1002         struct resource_track   rtrack;
1003 #endif
1004         unsigned char   frag, fsize;
1005         struct          problem_context pctx;
1006         struct          scan_callback_struct scan_struct;
1007         struct ext2_super_block *sb = ctx->fs->super;
1008         const char      *old_op;
1009         unsigned int    save_type;
1010         int             imagic_fs, extent_fs, inlinedata_fs;
1011         int             low_dtime_check = 1;
1012         int             inode_size = EXT2_INODE_SIZE(fs->super);
1013         int             failed_csum = 0;
1014         ext2_ino_t      ino_threshold = 0;
1015         dgrp_t          ra_group = 0;
1016
1017         init_resource_track(&rtrack, ctx->fs->io);
1018         clear_problem_context(&pctx);
1019
1020         /* If we can do readahead, figure out how many groups to pull in. */
1021         if (!e2fsck_can_readahead(ctx->fs))
1022                 ctx->readahead_kb = 0;
1023         else if (ctx->readahead_kb == ~0ULL)
1024                 ctx->readahead_kb = e2fsck_guess_readahead(ctx->fs);
1025         pass1_readahead(ctx, &ra_group, &ino_threshold);
1026
1027         if (!(ctx->options & E2F_OPT_PREEN))
1028                 fix_problem(ctx, PR_1_PASS_HEADER, &pctx);
1029
1030         if (ext2fs_has_feature_dir_index(fs->super) &&
1031             !(ctx->options & E2F_OPT_NO)) {
1032                 if (ext2fs_u32_list_create(&ctx->dirs_to_hash, 50))
1033                         ctx->dirs_to_hash = 0;
1034         }
1035
1036 #ifdef MTRACE
1037         mtrace_print("Pass 1");
1038 #endif
1039
1040 #define EXT2_BPP(bits) (1ULL << ((bits) - 2))
1041
1042         for (i = EXT2_MIN_BLOCK_LOG_SIZE; i <= EXT2_MAX_BLOCK_LOG_SIZE; i++) {
1043                 max_sizes = EXT2_NDIR_BLOCKS + EXT2_BPP(i);
1044                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i);
1045                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i) * EXT2_BPP(i);
1046                 max_sizes = (max_sizes * (1UL << i));
1047                 ext2_max_sizes[i - EXT2_MIN_BLOCK_LOG_SIZE] = max_sizes;
1048         }
1049 #undef EXT2_BPP
1050
1051         imagic_fs = ext2fs_has_feature_imagic_inodes(sb);
1052         extent_fs = ext2fs_has_feature_extents(sb);
1053         inlinedata_fs = ext2fs_has_feature_inline_data(sb);
1054
1055         /*
1056          * Allocate bitmaps structures
1057          */
1058         pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("in-use inode map"),
1059                                                     EXT2FS_BMAP64_RBTREE,
1060                                                     "inode_used_map",
1061                                                     &ctx->inode_used_map);
1062         if (pctx.errcode) {
1063                 pctx.num = 1;
1064                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1065                 ctx->flags |= E2F_FLAG_ABORT;
1066                 return;
1067         }
1068         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1069                         _("directory inode map"),
1070                         EXT2FS_BMAP64_AUTODIR,
1071                         "inode_dir_map", &ctx->inode_dir_map);
1072         if (pctx.errcode) {
1073                 pctx.num = 2;
1074                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1075                 ctx->flags |= E2F_FLAG_ABORT;
1076                 return;
1077         }
1078         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1079                         _("regular file inode map"), EXT2FS_BMAP64_RBTREE,
1080                         "inode_reg_map", &ctx->inode_reg_map);
1081         if (pctx.errcode) {
1082                 pctx.num = 6;
1083                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1084                 ctx->flags |= E2F_FLAG_ABORT;
1085                 return;
1086         }
1087         pctx.errcode = e2fsck_allocate_subcluster_bitmap(fs,
1088                         _("in-use block map"), EXT2FS_BMAP64_RBTREE,
1089                         "block_found_map", &ctx->block_found_map);
1090         if (pctx.errcode) {
1091                 pctx.num = 1;
1092                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1093                 ctx->flags |= E2F_FLAG_ABORT;
1094                 return;
1095         }
1096         pctx.errcode = e2fsck_allocate_block_bitmap(fs,
1097                         _("metadata block map"), EXT2FS_BMAP64_RBTREE,
1098                         "block_metadata_map", &ctx->block_metadata_map);
1099         if (pctx.errcode) {
1100                 pctx.num = 1;
1101                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1102                 ctx->flags |= E2F_FLAG_ABORT;
1103                 return;
1104         }
1105         e2fsck_setup_tdb_icount(ctx, 0, &ctx->inode_link_info);
1106         if (!ctx->inode_link_info) {
1107                 e2fsck_set_bitmap_type(fs, EXT2FS_BMAP64_RBTREE,
1108                                        "inode_link_info", &save_type);
1109                 pctx.errcode = ext2fs_create_icount2(fs, 0, 0, 0,
1110                                                      &ctx->inode_link_info);
1111                 fs->default_bitmap_type = save_type;
1112         }
1113
1114         if (pctx.errcode) {
1115                 fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
1116                 ctx->flags |= E2F_FLAG_ABORT;
1117                 return;
1118         }
1119         inode = (struct ext2_inode *)
1120                 e2fsck_allocate_memory(ctx, inode_size, "scratch inode");
1121
1122         inodes_to_process = (struct process_inode_block *)
1123                 e2fsck_allocate_memory(ctx,
1124                                        (ctx->process_inode_size *
1125                                         sizeof(struct process_inode_block)),
1126                                        "array of inodes to process");
1127         process_inode_count = 0;
1128
1129         pctx.errcode = ext2fs_init_dblist(fs, 0);
1130         if (pctx.errcode) {
1131                 fix_problem(ctx, PR_1_ALLOCATE_DBCOUNT, &pctx);
1132                 ctx->flags |= E2F_FLAG_ABORT;
1133                 goto endit;
1134         }
1135
1136         /*
1137          * If the last orphan field is set, clear it, since the pass1
1138          * processing will automatically find and clear the orphans.
1139          * In the future, we may want to try using the last_orphan
1140          * linked list ourselves, but for now, we clear it so that the
1141          * ext3 mount code won't get confused.
1142          */
1143         if (!(ctx->options & E2F_OPT_READONLY)) {
1144                 if (fs->super->s_last_orphan) {
1145                         fs->super->s_last_orphan = 0;
1146                         ext2fs_mark_super_dirty(fs);
1147                 }
1148         }
1149
1150         mark_table_blocks(ctx);
1151         pctx.errcode = ext2fs_convert_subcluster_bitmap(fs,
1152                                                 &ctx->block_found_map);
1153         if (pctx.errcode) {
1154                 fix_problem(ctx, PR_1_CONVERT_SUBCLUSTER, &pctx);
1155                 ctx->flags |= E2F_FLAG_ABORT;
1156                 goto endit;
1157         }
1158         block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3,
1159                                                     "block interate buffer");
1160         if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
1161                 e2fsck_use_inode_shortcuts(ctx, 1);
1162         e2fsck_intercept_block_allocations(ctx);
1163         old_op = ehandler_operation(_("opening inode scan"));
1164         pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks,
1165                                               &scan);
1166         ehandler_operation(old_op);
1167         if (pctx.errcode) {
1168                 fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1169                 ctx->flags |= E2F_FLAG_ABORT;
1170                 goto endit;
1171         }
1172         ext2fs_inode_scan_flags(scan, EXT2_SF_SKIP_MISSING_ITABLE |
1173                                       EXT2_SF_WARN_GARBAGE_INODES, 0);
1174         ctx->stashed_inode = inode;
1175         scan_struct.ctx = ctx;
1176         scan_struct.block_buf = block_buf;
1177         ext2fs_set_inode_callback(scan, scan_callback, &scan_struct);
1178         if (ctx->progress && ((ctx->progress)(ctx, 1, 0,
1179                                               ctx->fs->group_desc_count)))
1180                 goto endit;
1181         if ((fs->super->s_wtime < fs->super->s_inodes_count) ||
1182             (fs->super->s_mtime < fs->super->s_inodes_count) ||
1183             (fs->super->s_mkfs_time &&
1184              fs->super->s_mkfs_time < fs->super->s_inodes_count))
1185                 low_dtime_check = 0;
1186
1187         if (ext2fs_has_feature_mmp(fs->super) &&
1188             fs->super->s_mmp_block > fs->super->s_first_data_block &&
1189             fs->super->s_mmp_block < ext2fs_blocks_count(fs->super))
1190                 ext2fs_mark_block_bitmap2(ctx->block_found_map,
1191                                           fs->super->s_mmp_block);
1192
1193         /* Set up ctx->lost_and_found if possible */
1194         (void) e2fsck_get_lost_and_found(ctx, 0);
1195
1196         while (1) {
1197                 if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
1198                         if (e2fsck_mmp_update(fs))
1199                                 fatal_error(ctx, 0);
1200                 }
1201                 old_op = ehandler_operation(_("getting next inode from scan"));
1202                 pctx.errcode = ext2fs_get_next_inode_full(scan, &ino,
1203                                                           inode, inode_size);
1204                 if (ino > ino_threshold)
1205                         pass1_readahead(ctx, &ra_group, &ino_threshold);
1206                 ehandler_operation(old_op);
1207                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1208                         goto endit;
1209                 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) {
1210                         /*
1211                          * If badblocks says badblocks is bad, offer to clear
1212                          * the list, update the in-core bb list, and restart
1213                          * the inode scan.
1214                          */
1215                         if (ino == EXT2_BAD_INO &&
1216                             fix_problem(ctx, PR_1_BADBLOCKS_IN_BADBLOCKS,
1217                                         &pctx)) {
1218                                 errcode_t err;
1219
1220                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1221                                 ext2fs_badblocks_list_free(ctx->fs->badblocks);
1222                                 ctx->fs->badblocks = NULL;
1223                                 err = ext2fs_read_bb_inode(ctx->fs,
1224                                                         &ctx->fs->badblocks);
1225                                 if (err) {
1226                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1227                                                     &pctx);
1228                                         ctx->flags |= E2F_FLAG_ABORT;
1229                                         goto endit;
1230                                 }
1231                                 err = ext2fs_inode_scan_goto_blockgroup(scan,
1232                                                                         0);
1233                                 if (err) {
1234                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1235                                                     &pctx);
1236                                         ctx->flags |= E2F_FLAG_ABORT;
1237                                         goto endit;
1238                                 }
1239                                 continue;
1240                         }
1241                         if (!ctx->inode_bb_map)
1242                                 alloc_bb_map(ctx);
1243                         ext2fs_mark_inode_bitmap2(ctx->inode_bb_map, ino);
1244                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1245                         continue;
1246                 }
1247                 if (pctx.errcode &&
1248                     pctx.errcode != EXT2_ET_INODE_CSUM_INVALID &&
1249                     pctx.errcode != EXT2_ET_INODE_IS_GARBAGE) {
1250                         fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1251                         ctx->flags |= E2F_FLAG_ABORT;
1252                         goto endit;
1253                 }
1254                 if (!ino)
1255                         break;
1256                 pctx.ino = ino;
1257                 pctx.inode = inode;
1258                 ctx->stashed_ino = ino;
1259
1260                 /* Clear trashed inode? */
1261                 if (pctx.errcode == EXT2_ET_INODE_IS_GARBAGE &&
1262                     inode->i_links_count > 0 &&
1263                     fix_problem(ctx, PR_1_INODE_IS_GARBAGE, &pctx)) {
1264                         pctx.errcode = 0;
1265                         e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1266                 }
1267                 failed_csum = pctx.errcode != 0;
1268
1269                 if (inode->i_links_count) {
1270                         pctx.errcode = ext2fs_icount_store(ctx->inode_link_info,
1271                                            ino, inode->i_links_count);
1272                         if (pctx.errcode) {
1273                                 pctx.num = inode->i_links_count;
1274                                 fix_problem(ctx, PR_1_ICOUNT_STORE, &pctx);
1275                                 ctx->flags |= E2F_FLAG_ABORT;
1276                                 goto endit;
1277                         }
1278                 }
1279
1280                 /* Conflicting inlinedata/extents inode flags? */
1281                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
1282                     (inode->i_flags & EXT4_EXTENTS_FL)) {
1283                         int res = fix_inline_data_extents_file(ctx, ino, inode,
1284                                                                inode_size,
1285                                                                &pctx);
1286                         if (res < 0) {
1287                                 /* skip FINISH_INODE_LOOP */
1288                                 continue;
1289                         }
1290                 }
1291
1292                 /* Test for incorrect inline_data flags settings. */
1293                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && !inlinedata_fs &&
1294                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1295                         size_t size = 0;
1296
1297                         pctx.errcode = ext2fs_inline_data_size(fs, ino, &size);
1298                         if (!pctx.errcode && size &&
1299                             fix_problem(ctx, PR_1_INLINE_DATA_FEATURE, &pctx)) {
1300                                 ext2fs_set_feature_inline_data(sb);
1301                                 ext2fs_mark_super_dirty(fs);
1302                                 inlinedata_fs = 1;
1303                         } else if (fix_problem(ctx, PR_1_INLINE_DATA_SET, &pctx)) {
1304                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1305                                 /* skip FINISH_INODE_LOOP */
1306                                 continue;
1307                         }
1308                 }
1309
1310                 /* Test for inline data flag but no attr */
1311                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && inlinedata_fs &&
1312                     EXT2_I_SIZE(inode) > EXT4_MIN_INLINE_DATA_SIZE &&
1313                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1314                         size_t size = 0;
1315                         errcode_t err;
1316                         int flags;
1317
1318                         flags = fs->flags;
1319                         if (failed_csum)
1320                                 fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1321                         err = get_inline_data_ea_size(fs, ino, &size);
1322                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1323                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1324
1325                         switch (err) {
1326                         case 0:
1327                                 /* Everything is awesome... */
1328                                 break;
1329                         case EXT2_ET_BAD_EA_BLOCK_NUM:
1330                         case EXT2_ET_BAD_EA_HASH:
1331                         case EXT2_ET_BAD_EA_HEADER:
1332                         case EXT2_ET_EA_BAD_NAME_LEN:
1333                         case EXT2_ET_EA_BAD_VALUE_SIZE:
1334                         case EXT2_ET_EA_KEY_NOT_FOUND:
1335                         case EXT2_ET_EA_NO_SPACE:
1336                         case EXT2_ET_MISSING_EA_FEATURE:
1337                         case EXT2_ET_INLINE_DATA_CANT_ITERATE:
1338                         case EXT2_ET_INLINE_DATA_NO_BLOCK:
1339                         case EXT2_ET_INLINE_DATA_NO_SPACE:
1340                         case EXT2_ET_NO_INLINE_DATA:
1341                         case EXT2_ET_EXT_ATTR_CSUM_INVALID:
1342                         case EXT2_ET_EA_BAD_VALUE_OFFSET:
1343                                 /* broken EA or no system.data EA; truncate */
1344                                 if (fix_problem(ctx, PR_1_INLINE_DATA_NO_ATTR,
1345                                                 &pctx)) {
1346                                         err = ext2fs_inode_size_set(fs, inode,
1347                                                         sizeof(inode->i_block));
1348                                         if (err) {
1349                                                 pctx.errcode = err;
1350                                                 ctx->flags |= E2F_FLAG_ABORT;
1351                                                 goto endit;
1352                                         }
1353                                         if (LINUX_S_ISLNK(inode->i_mode))
1354                                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1355                                         e2fsck_write_inode(ctx, ino, inode,
1356                                                            "pass1");
1357                                         failed_csum = 0;
1358                                 }
1359                                 break;
1360                         default:
1361                                 /* Some other kind of non-xattr error? */
1362                                 pctx.errcode = err;
1363                                 ctx->flags |= E2F_FLAG_ABORT;
1364                                 goto endit;
1365                         }
1366                 }
1367
1368                 /*
1369                  * Test for incorrect extent flag settings.
1370                  *
1371                  * On big-endian machines we must be careful:
1372                  * When the inode is read, the i_block array is not swapped
1373                  * if the extent flag is set.  Therefore if we are testing
1374                  * for or fixing a wrongly-set flag, we must potentially
1375                  * (un)swap before testing, or after fixing.
1376                  */
1377
1378                 /*
1379                  * In this case the extents flag was set when read, so
1380                  * extent_header_verify is ok.  If the inode is cleared,
1381                  * no need to swap... so no extra swapping here.
1382                  */
1383                 if ((inode->i_flags & EXT4_EXTENTS_FL) && !extent_fs &&
1384                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1385                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO))) {
1386                         if ((ext2fs_extent_header_verify(inode->i_block,
1387                                                  sizeof(inode->i_block)) == 0) &&
1388                             fix_problem(ctx, PR_1_EXTENT_FEATURE, &pctx)) {
1389                                 ext2fs_set_feature_extents(sb);
1390                                 ext2fs_mark_super_dirty(fs);
1391                                 extent_fs = 1;
1392                         } else if (fix_problem(ctx, PR_1_EXTENTS_SET, &pctx)) {
1393                         clear_inode:
1394                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1395                                 if (ino == EXT2_BAD_INO)
1396                                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map,
1397                                                                  ino);
1398                                 /* skip FINISH_INODE_LOOP */
1399                                 continue;
1400                         }
1401                 }
1402
1403                 /*
1404                  * For big-endian machines:
1405                  * If the inode didn't have the extents flag set when it
1406                  * was read, then the i_blocks array was swapped.  To test
1407                  * as an extents header, we must swap it back first.
1408                  * IF we then set the extents flag, the entire i_block
1409                  * array must be un/re-swapped to make it proper extents data.
1410                  */
1411                 if (extent_fs && !(inode->i_flags & EXT4_EXTENTS_FL) &&
1412                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1413                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO)) &&
1414                     (LINUX_S_ISREG(inode->i_mode) ||
1415                      LINUX_S_ISDIR(inode->i_mode))) {
1416                         void *ehp;
1417 #ifdef WORDS_BIGENDIAN
1418                         __u32 tmp_block[EXT2_N_BLOCKS];
1419
1420                         for (i = 0; i < EXT2_N_BLOCKS; i++)
1421                                 tmp_block[i] = ext2fs_swab32(inode->i_block[i]);
1422                         ehp = tmp_block;
1423 #else
1424                         ehp = inode->i_block;
1425 #endif
1426                         if ((ext2fs_extent_header_verify(ehp,
1427                                          sizeof(inode->i_block)) == 0) &&
1428                             (fix_problem(ctx, PR_1_UNSET_EXTENT_FL, &pctx))) {
1429                                 inode->i_flags |= EXT4_EXTENTS_FL;
1430 #ifdef WORDS_BIGENDIAN
1431                                 memcpy(inode->i_block, tmp_block,
1432                                        sizeof(inode->i_block));
1433 #endif
1434                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1435                                 failed_csum = 0;
1436                         }
1437                 }
1438
1439                 if (ino == EXT2_BAD_INO) {
1440                         struct process_block_struct pb;
1441
1442                         if ((failed_csum || inode->i_mode || inode->i_uid ||
1443                              inode->i_gid || inode->i_links_count ||
1444                              (inode->i_flags & EXT4_INLINE_DATA_FL) ||
1445                              inode->i_file_acl) &&
1446                             fix_problem(ctx, PR_1_INVALID_BAD_INODE, &pctx)) {
1447                                 memset(inode, 0, sizeof(struct ext2_inode));
1448                                 e2fsck_write_inode(ctx, ino, inode,
1449                                                    "clear bad inode");
1450                                 failed_csum = 0;
1451                         }
1452
1453                         pctx.errcode = ext2fs_copy_bitmap(ctx->block_found_map,
1454                                                           &pb.fs_meta_blocks);
1455                         if (pctx.errcode) {
1456                                 pctx.num = 4;
1457                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1458                                 ctx->flags |= E2F_FLAG_ABORT;
1459                                 goto endit;
1460                         }
1461                         pb.ino = EXT2_BAD_INO;
1462                         pb.num_blocks = pb.last_block = 0;
1463                         pb.last_db_block = -1;
1464                         pb.num_illegal_blocks = 0;
1465                         pb.suppress = 0; pb.clear = 0; pb.is_dir = 0;
1466                         pb.is_reg = 0; pb.fragmented = 0; pb.bbcheck = 0;
1467                         pb.inode = inode;
1468                         pb.pctx = &pctx;
1469                         pb.ctx = ctx;
1470                         pctx.errcode = ext2fs_block_iterate3(fs, ino, 0,
1471                                      block_buf, process_bad_block, &pb);
1472                         ext2fs_free_block_bitmap(pb.fs_meta_blocks);
1473                         if (pctx.errcode) {
1474                                 fix_problem(ctx, PR_1_BLOCK_ITERATE, &pctx);
1475                                 ctx->flags |= E2F_FLAG_ABORT;
1476                                 goto endit;
1477                         }
1478                         if (pb.bbcheck)
1479                                 if (!fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK_PROMPT, &pctx)) {
1480                                 ctx->flags |= E2F_FLAG_ABORT;
1481                                 goto endit;
1482                         }
1483                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1484                         clear_problem_context(&pctx);
1485                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1486                         continue;
1487                 } else if (ino == EXT2_ROOT_INO) {
1488                         /*
1489                          * Make sure the root inode is a directory; if
1490                          * not, offer to clear it.  It will be
1491                          * regnerated in pass #3.
1492                          */
1493                         if (!LINUX_S_ISDIR(inode->i_mode)) {
1494                                 if (fix_problem(ctx, PR_1_ROOT_NO_DIR, &pctx))
1495                                         goto clear_inode;
1496                         }
1497                         /*
1498                          * If dtime is set, offer to clear it.  mke2fs
1499                          * version 0.2b created filesystems with the
1500                          * dtime field set for the root and lost+found
1501                          * directories.  We won't worry about
1502                          * /lost+found, since that can be regenerated
1503                          * easily.  But we will fix the root directory
1504                          * as a special case.
1505                          */
1506                         if (inode->i_dtime && inode->i_links_count) {
1507                                 if (fix_problem(ctx, PR_1_ROOT_DTIME, &pctx)) {
1508                                         inode->i_dtime = 0;
1509                                         e2fsck_write_inode(ctx, ino, inode,
1510                                                            "pass1");
1511                                         failed_csum = 0;
1512                                 }
1513                         }
1514                 } else if (ino == EXT2_JOURNAL_INO) {
1515                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1516                         if (fs->super->s_journal_inum == EXT2_JOURNAL_INO) {
1517                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1518                                     fix_problem(ctx, PR_1_JOURNAL_BAD_MODE,
1519                                                 &pctx)) {
1520                                         inode->i_mode = LINUX_S_IFREG;
1521                                         e2fsck_write_inode(ctx, ino, inode,
1522                                                            "pass1");
1523                                         failed_csum = 0;
1524                                 }
1525                                 check_blocks(ctx, &pctx, block_buf);
1526                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1527                                 continue;
1528                         }
1529                         if ((inode->i_links_count ||
1530                              inode->i_blocks || inode->i_block[0]) &&
1531                             fix_problem(ctx, PR_1_JOURNAL_INODE_NOT_CLEAR,
1532                                         &pctx)) {
1533                                 memset(inode, 0, inode_size);
1534                                 ext2fs_icount_store(ctx->inode_link_info,
1535                                                     ino, 0);
1536                                 e2fsck_write_inode_full(ctx, ino, inode,
1537                                                         inode_size, "pass1");
1538                                 failed_csum = 0;
1539                         }
1540                 } else if (quota_inum_is_reserved(fs, ino)) {
1541                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1542                         if (ext2fs_has_feature_quota(fs->super) &&
1543                             quota_inum_is_super(fs->super, ino)) {
1544                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1545                                     fix_problem(ctx, PR_1_QUOTA_BAD_MODE,
1546                                                         &pctx)) {
1547                                         inode->i_mode = LINUX_S_IFREG;
1548                                         e2fsck_write_inode(ctx, ino, inode,
1549                                                         "pass1");
1550                                         failed_csum = 0;
1551                                 }
1552                                 check_blocks(ctx, &pctx, block_buf);
1553                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1554                                 continue;
1555                         }
1556                         if ((inode->i_links_count ||
1557                              inode->i_blocks || inode->i_block[0]) &&
1558                             fix_problem(ctx, PR_1_QUOTA_INODE_NOT_CLEAR,
1559                                         &pctx)) {
1560                                 memset(inode, 0, inode_size);
1561                                 ext2fs_icount_store(ctx->inode_link_info,
1562                                                     ino, 0);
1563                                 e2fsck_write_inode_full(ctx, ino, inode,
1564                                                         inode_size, "pass1");
1565                                 failed_csum = 0;
1566                         }
1567                 } else if (ino < EXT2_FIRST_INODE(fs->super)) {
1568                         problem_t problem = 0;
1569
1570                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1571                         if (ino == EXT2_BOOT_LOADER_INO) {
1572                                 if (LINUX_S_ISDIR(inode->i_mode))
1573                                         problem = PR_1_RESERVED_BAD_MODE;
1574                         } else if (ino == EXT2_RESIZE_INO) {
1575                                 if (inode->i_mode &&
1576                                     !LINUX_S_ISREG(inode->i_mode))
1577                                         problem = PR_1_RESERVED_BAD_MODE;
1578                         } else {
1579                                 if (inode->i_mode != 0)
1580                                         problem = PR_1_RESERVED_BAD_MODE;
1581                         }
1582                         if (problem) {
1583                                 if (fix_problem(ctx, problem, &pctx)) {
1584                                         inode->i_mode = 0;
1585                                         e2fsck_write_inode(ctx, ino, inode,
1586                                                            "pass1");
1587                                         failed_csum = 0;
1588                                 }
1589                         }
1590                         check_blocks(ctx, &pctx, block_buf);
1591                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1592                         continue;
1593                 }
1594
1595                 /*
1596                  * Check for inodes who might have been part of the
1597                  * orphaned list linked list.  They should have gotten
1598                  * dealt with by now, unless the list had somehow been
1599                  * corrupted.
1600                  *
1601                  * FIXME: In the future, inodes which are still in use
1602                  * (and which are therefore) pending truncation should
1603                  * be handled specially.  Right now we just clear the
1604                  * dtime field, and the normal e2fsck handling of
1605                  * inodes where i_size and the inode blocks are
1606                  * inconsistent is to fix i_size, instead of releasing
1607                  * the extra blocks.  This won't catch the inodes that
1608                  * was at the end of the orphan list, but it's better
1609                  * than nothing.  The right answer is that there
1610                  * shouldn't be any bugs in the orphan list handling.  :-)
1611                  */
1612                 if (inode->i_dtime && low_dtime_check &&
1613                     inode->i_dtime < ctx->fs->super->s_inodes_count) {
1614                         if (fix_problem(ctx, PR_1_LOW_DTIME, &pctx)) {
1615                                 inode->i_dtime = inode->i_links_count ?
1616                                         0 : ctx->now;
1617                                 e2fsck_write_inode(ctx, ino, inode,
1618                                                    "pass1");
1619                                 failed_csum = 0;
1620                         }
1621                 }
1622
1623                 /*
1624                  * This code assumes that deleted inodes have
1625                  * i_links_count set to 0.
1626                  */
1627                 if (!inode->i_links_count) {
1628                         if (!inode->i_dtime && inode->i_mode) {
1629                                 if (fix_problem(ctx,
1630                                             PR_1_ZERO_DTIME, &pctx)) {
1631                                         inode->i_dtime = ctx->now;
1632                                         e2fsck_write_inode(ctx, ino, inode,
1633                                                            "pass1");
1634                                         failed_csum = 0;
1635                                 }
1636                         }
1637                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1638                         continue;
1639                 }
1640                 /*
1641                  * n.b.  0.3c ext2fs code didn't clear i_links_count for
1642                  * deleted files.  Oops.
1643                  *
1644                  * Since all new ext2 implementations get this right,
1645                  * we now assume that the case of non-zero
1646                  * i_links_count and non-zero dtime means that we
1647                  * should keep the file, not delete it.
1648                  *
1649                  */
1650                 if (inode->i_dtime) {
1651                         if (fix_problem(ctx, PR_1_SET_DTIME, &pctx)) {
1652                                 inode->i_dtime = 0;
1653                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1654                                 failed_csum = 0;
1655                         }
1656                 }
1657
1658                 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1659                 switch (fs->super->s_creator_os) {
1660                     case EXT2_OS_HURD:
1661                         frag = inode->osd2.hurd2.h_i_frag;
1662                         fsize = inode->osd2.hurd2.h_i_fsize;
1663                         break;
1664                     default:
1665                         frag = fsize = 0;
1666                 }
1667
1668                 if (inode->i_faddr || frag || fsize ||
1669                     (LINUX_S_ISDIR(inode->i_mode) && inode->i_dir_acl))
1670                         mark_inode_bad(ctx, ino);
1671                 if ((fs->super->s_creator_os == EXT2_OS_LINUX) &&
1672                     !ext2fs_has_feature_64bit(fs->super) &&
1673                     inode->osd2.linux2.l_i_file_acl_high != 0)
1674                         mark_inode_bad(ctx, ino);
1675                 if ((fs->super->s_creator_os == EXT2_OS_LINUX) &&
1676                     !ext2fs_has_feature_huge_file(fs->super) &&
1677                     (inode->osd2.linux2.l_i_blocks_hi != 0))
1678                         mark_inode_bad(ctx, ino);
1679                 if (inode->i_flags & EXT2_IMAGIC_FL) {
1680                         if (imagic_fs) {
1681                                 if (!ctx->inode_imagic_map)
1682                                         alloc_imagic_map(ctx);
1683                                 ext2fs_mark_inode_bitmap2(ctx->inode_imagic_map,
1684                                                          ino);
1685                         } else {
1686                                 if (fix_problem(ctx, PR_1_SET_IMAGIC, &pctx)) {
1687                                         inode->i_flags &= ~EXT2_IMAGIC_FL;
1688                                         e2fsck_write_inode(ctx, ino,
1689                                                            inode, "pass1");
1690                                         failed_csum = 0;
1691                                 }
1692                         }
1693                 }
1694
1695                 check_inode_extra_space(ctx, &pctx);
1696                 check_is_really_dir(ctx, &pctx, block_buf);
1697
1698                 /*
1699                  * ext2fs_inode_has_valid_blocks2 does not actually look
1700                  * at i_block[] values, so not endian-sensitive here.
1701                  */
1702                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL) &&
1703                     LINUX_S_ISLNK(inode->i_mode) &&
1704                     !ext2fs_inode_has_valid_blocks2(fs, inode) &&
1705                     fix_problem(ctx, PR_1_FAST_SYMLINK_EXTENT_FL, &pctx)) {
1706                         inode->i_flags &= ~EXT4_EXTENTS_FL;
1707                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1708                         failed_csum = 0;
1709                 }
1710
1711                 if (LINUX_S_ISDIR(inode->i_mode)) {
1712                         ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
1713                         e2fsck_add_dir_info(ctx, ino, 0);
1714                         ctx->fs_directory_count++;
1715                         if (inode->i_flags & EXT4_ENCRYPT_FL)
1716                                 add_encrypted_dir(ctx, ino);
1717                 } else if (LINUX_S_ISREG (inode->i_mode)) {
1718                         ext2fs_mark_inode_bitmap2(ctx->inode_reg_map, ino);
1719                         ctx->fs_regular_count++;
1720                 } else if (LINUX_S_ISCHR (inode->i_mode) &&
1721                            e2fsck_pass1_check_device_inode(fs, inode)) {
1722                         check_extents_inlinedata(ctx, &pctx);
1723                         check_immutable(ctx, &pctx);
1724                         check_size(ctx, &pctx);
1725                         ctx->fs_chardev_count++;
1726                 } else if (LINUX_S_ISBLK (inode->i_mode) &&
1727                            e2fsck_pass1_check_device_inode(fs, inode)) {
1728                         check_extents_inlinedata(ctx, &pctx);
1729                         check_immutable(ctx, &pctx);
1730                         check_size(ctx, &pctx);
1731                         ctx->fs_blockdev_count++;
1732                 } else if (LINUX_S_ISLNK (inode->i_mode) &&
1733                            e2fsck_pass1_check_symlink(fs, ino, inode,
1734                                                       block_buf)) {
1735                         check_immutable(ctx, &pctx);
1736                         ctx->fs_symlinks_count++;
1737                         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
1738                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1739                                 continue;
1740                         } else if (ext2fs_inode_data_blocks(fs, inode) == 0) {
1741                                 ctx->fs_fast_symlinks_count++;
1742                                 check_blocks(ctx, &pctx, block_buf);
1743                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1744                                 continue;
1745                         }
1746                 }
1747                 else if (LINUX_S_ISFIFO (inode->i_mode) &&
1748                          e2fsck_pass1_check_device_inode(fs, inode)) {
1749                         check_extents_inlinedata(ctx, &pctx);
1750                         check_immutable(ctx, &pctx);
1751                         check_size(ctx, &pctx);
1752                         ctx->fs_fifo_count++;
1753                 } else if ((LINUX_S_ISSOCK (inode->i_mode)) &&
1754                            e2fsck_pass1_check_device_inode(fs, inode)) {
1755                         check_extents_inlinedata(ctx, &pctx);
1756                         check_immutable(ctx, &pctx);
1757                         check_size(ctx, &pctx);
1758                         ctx->fs_sockets_count++;
1759                 } else
1760                         mark_inode_bad(ctx, ino);
1761                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1762                     !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
1763                         if (inode->i_block[EXT2_IND_BLOCK])
1764                                 ctx->fs_ind_count++;
1765                         if (inode->i_block[EXT2_DIND_BLOCK])
1766                                 ctx->fs_dind_count++;
1767                         if (inode->i_block[EXT2_TIND_BLOCK])
1768                                 ctx->fs_tind_count++;
1769                 }
1770                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1771                     !(inode->i_flags & EXT4_INLINE_DATA_FL) &&
1772                     (inode->i_block[EXT2_IND_BLOCK] ||
1773                      inode->i_block[EXT2_DIND_BLOCK] ||
1774                      inode->i_block[EXT2_TIND_BLOCK] ||
1775                      ext2fs_file_acl_block(fs, inode))) {
1776                         inodes_to_process[process_inode_count].ino = ino;
1777                         inodes_to_process[process_inode_count].inode = *inode;
1778                         process_inode_count++;
1779                 } else
1780                         check_blocks(ctx, &pctx, block_buf);
1781
1782                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1783
1784                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1785                         goto endit;
1786
1787                 if (process_inode_count >= ctx->process_inode_size) {
1788                         process_inodes(ctx, block_buf);
1789
1790                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1791                                 goto endit;
1792                 }
1793         }
1794         process_inodes(ctx, block_buf);
1795         ext2fs_close_inode_scan(scan);
1796         scan = NULL;
1797
1798         reserve_block_for_root_repair(ctx);
1799         reserve_block_for_lnf_repair(ctx);
1800
1801         /*
1802          * If any extended attribute blocks' reference counts need to
1803          * be adjusted, either up (ctx->refcount_extra), or down
1804          * (ctx->refcount), then fix them.
1805          */
1806         if (ctx->refcount) {
1807                 adjust_extattr_refcount(ctx, ctx->refcount, block_buf, -1);
1808                 ea_refcount_free(ctx->refcount);
1809                 ctx->refcount = 0;
1810         }
1811         if (ctx->refcount_extra) {
1812                 adjust_extattr_refcount(ctx, ctx->refcount_extra,
1813                                         block_buf, +1);
1814                 ea_refcount_free(ctx->refcount_extra);
1815                 ctx->refcount_extra = 0;
1816         }
1817
1818         if (ctx->invalid_bitmaps)
1819                 handle_fs_bad_blocks(ctx);
1820
1821         /* We don't need the block_ea_map any more */
1822         if (ctx->block_ea_map) {
1823                 ext2fs_free_block_bitmap(ctx->block_ea_map);
1824                 ctx->block_ea_map = 0;
1825         }
1826
1827         if (ctx->flags & E2F_FLAG_RESIZE_INODE) {
1828                 clear_problem_context(&pctx);
1829                 pctx.errcode = ext2fs_create_resize_inode(fs);
1830                 if (pctx.errcode) {
1831                         if (!fix_problem(ctx, PR_1_RESIZE_INODE_CREATE,
1832                                          &pctx)) {
1833                                 ctx->flags |= E2F_FLAG_ABORT;
1834                                 goto endit;
1835                         }
1836                         pctx.errcode = 0;
1837                 }
1838                 if (!pctx.errcode) {
1839                         e2fsck_read_inode(ctx, EXT2_RESIZE_INO, inode,
1840                                           "recreate inode");
1841                         inode->i_mtime = ctx->now;
1842                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, inode,
1843                                            "recreate inode");
1844                 }
1845                 ctx->flags &= ~E2F_FLAG_RESIZE_INODE;
1846         }
1847
1848         if (ctx->flags & E2F_FLAG_RESTART) {
1849                 /*
1850                  * Only the master copy of the superblock and block
1851                  * group descriptors are going to be written during a
1852                  * restart, so set the superblock to be used to be the
1853                  * master superblock.
1854                  */
1855                 ctx->use_superblock = 0;
1856                 unwind_pass1(fs);
1857                 goto endit;
1858         }
1859
1860         if (ctx->block_dup_map) {
1861                 if (ctx->options & E2F_OPT_PREEN) {
1862                         clear_problem_context(&pctx);
1863                         fix_problem(ctx, PR_1_DUP_BLOCKS_PREENSTOP, &pctx);
1864                 }
1865                 e2fsck_pass1_dupblocks(ctx, block_buf);
1866         }
1867         ctx->flags |= E2F_FLAG_ALLOC_OK;
1868         ext2fs_free_mem(&inodes_to_process);
1869 endit:
1870         e2fsck_use_inode_shortcuts(ctx, 0);
1871
1872         if (scan)
1873                 ext2fs_close_inode_scan(scan);
1874         if (block_buf)
1875                 ext2fs_free_mem(&block_buf);
1876         if (inode)
1877                 ext2fs_free_mem(&inode);
1878
1879         /*
1880          * The l+f inode may have been cleared, so zap it now and
1881          * later passes will recalculate it if necessary
1882          */
1883         ctx->lost_and_found = 0;
1884
1885         if ((ctx->flags & E2F_FLAG_SIGNAL_MASK) == 0)
1886                 print_resource_track(ctx, _("Pass 1"), &rtrack, ctx->fs->io);
1887         else
1888                 ctx->invalid_bitmaps++;
1889 }
1890 #undef FINISH_INODE_LOOP
1891
1892 /*
1893  * When the inode_scan routines call this callback at the end of the
1894  * glock group, call process_inodes.
1895  */
1896 static errcode_t scan_callback(ext2_filsys fs,
1897                                ext2_inode_scan scan EXT2FS_ATTR((unused)),
1898                                dgrp_t group, void * priv_data)
1899 {
1900         struct scan_callback_struct *scan_struct;
1901         e2fsck_t ctx;
1902
1903         scan_struct = (struct scan_callback_struct *) priv_data;
1904         ctx = scan_struct->ctx;
1905
1906         process_inodes((e2fsck_t) fs->priv_data, scan_struct->block_buf);
1907
1908         if (ctx->progress)
1909                 if ((ctx->progress)(ctx, 1, group+1,
1910                                     ctx->fs->group_desc_count))
1911                         return EXT2_ET_CANCEL_REQUESTED;
1912
1913         return 0;
1914 }
1915
1916 /*
1917  * Process the inodes in the "inodes to process" list.
1918  */
1919 static void process_inodes(e2fsck_t ctx, char *block_buf)
1920 {
1921         int                     i;
1922         struct ext2_inode       *old_stashed_inode;
1923         ext2_ino_t              old_stashed_ino;
1924         const char              *old_operation;
1925         char                    buf[80];
1926         struct problem_context  pctx;
1927
1928 #if 0
1929         printf("begin process_inodes: ");
1930 #endif
1931         if (process_inode_count == 0)
1932                 return;
1933         old_operation = ehandler_operation(0);
1934         old_stashed_inode = ctx->stashed_inode;
1935         old_stashed_ino = ctx->stashed_ino;
1936         qsort(inodes_to_process, process_inode_count,
1937                       sizeof(struct process_inode_block), process_inode_cmp);
1938         clear_problem_context(&pctx);
1939         for (i=0; i < process_inode_count; i++) {
1940                 pctx.inode = ctx->stashed_inode = &inodes_to_process[i].inode;
1941                 pctx.ino = ctx->stashed_ino = inodes_to_process[i].ino;
1942
1943 #if 0
1944                 printf("%u ", pctx.ino);
1945 #endif
1946                 sprintf(buf, _("reading indirect blocks of inode %u"),
1947                         pctx.ino);
1948                 ehandler_operation(buf);
1949                 check_blocks(ctx, &pctx, block_buf);
1950                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1951                         break;
1952         }
1953         ctx->stashed_inode = old_stashed_inode;
1954         ctx->stashed_ino = old_stashed_ino;
1955         process_inode_count = 0;
1956 #if 0
1957         printf("end process inodes\n");
1958 #endif
1959         ehandler_operation(old_operation);
1960 }
1961
1962 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b)
1963 {
1964         const struct process_inode_block *ib_a =
1965                 (const struct process_inode_block *) a;
1966         const struct process_inode_block *ib_b =
1967                 (const struct process_inode_block *) b;
1968         int     ret;
1969
1970         ret = (ib_a->inode.i_block[EXT2_IND_BLOCK] -
1971                ib_b->inode.i_block[EXT2_IND_BLOCK]);
1972         if (ret == 0)
1973                 /*
1974                  * We only call process_inodes() for non-extent
1975                  * inodes, so it's OK to pass NULL to
1976                  * ext2fs_file_acl_block() here.
1977                  */
1978                 ret = ext2fs_file_acl_block(0, &(ib_a->inode)) -
1979                         ext2fs_file_acl_block(0, &(ib_b->inode));
1980         if (ret == 0)
1981                 ret = ib_a->ino - ib_b->ino;
1982         return ret;
1983 }
1984
1985 /*
1986  * Mark an inode as being bad in some what
1987  */
1988 static void mark_inode_bad(e2fsck_t ctx, ino_t ino)
1989 {
1990         struct          problem_context pctx;
1991
1992         if (!ctx->inode_bad_map) {
1993                 clear_problem_context(&pctx);
1994
1995                 pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
1996                                 _("bad inode map"), EXT2FS_BMAP64_RBTREE,
1997                                 "inode_bad_map", &ctx->inode_bad_map);
1998                 if (pctx.errcode) {
1999                         pctx.num = 3;
2000                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2001                         /* Should never get here */
2002                         ctx->flags |= E2F_FLAG_ABORT;
2003                         return;
2004                 }
2005         }
2006         ext2fs_mark_inode_bitmap2(ctx->inode_bad_map, ino);
2007 }
2008
2009 static void add_encrypted_dir(e2fsck_t ctx, ino_t ino)
2010 {
2011         struct          problem_context pctx;
2012
2013         if (!ctx->encrypted_dirs) {
2014                 pctx.errcode = ext2fs_u32_list_create(&ctx->encrypted_dirs, 0);
2015                 if (pctx.errcode)
2016                         goto error;
2017         }
2018         pctx.errcode = ext2fs_u32_list_add(ctx->encrypted_dirs, ino);
2019         if (pctx.errcode == 0)
2020                 return;
2021 error:
2022         fix_problem(ctx, PR_1_ALLOCATE_ENCRYPTED_DIRLIST, &pctx);
2023         /* Should never get here */
2024         ctx->flags |= E2F_FLAG_ABORT;
2025 }
2026
2027 /*
2028  * This procedure will allocate the inode "bb" (badblock) map table
2029  */
2030 static void alloc_bb_map(e2fsck_t ctx)
2031 {
2032         struct          problem_context pctx;
2033
2034         clear_problem_context(&pctx);
2035         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2036                         _("inode in bad block map"), EXT2FS_BMAP64_RBTREE,
2037                         "inode_bb_map", &ctx->inode_bb_map);
2038         if (pctx.errcode) {
2039                 pctx.num = 4;
2040                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2041                 /* Should never get here */
2042                 ctx->flags |= E2F_FLAG_ABORT;
2043                 return;
2044         }
2045 }
2046
2047 /*
2048  * This procedure will allocate the inode imagic table
2049  */
2050 static void alloc_imagic_map(e2fsck_t ctx)
2051 {
2052         struct          problem_context pctx;
2053
2054         clear_problem_context(&pctx);
2055         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2056                         _("imagic inode map"), EXT2FS_BMAP64_RBTREE,
2057                         "inode_imagic_map", &ctx->inode_imagic_map);
2058         if (pctx.errcode) {
2059                 pctx.num = 5;
2060                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2061                 /* Should never get here */
2062                 ctx->flags |= E2F_FLAG_ABORT;
2063                 return;
2064         }
2065 }
2066
2067 /*
2068  * Marks a block as in use, setting the dup_map if it's been set
2069  * already.  Called by process_block and process_bad_block.
2070  *
2071  * WARNING: Assumes checks have already been done to make sure block
2072  * is valid.  This is true in both process_block and process_bad_block.
2073  */
2074 static _INLINE_ void mark_block_used(e2fsck_t ctx, blk64_t block)
2075 {
2076         struct          problem_context pctx;
2077
2078         clear_problem_context(&pctx);
2079
2080         if (ext2fs_fast_test_block_bitmap2(ctx->block_found_map, block)) {
2081                 if (!ctx->block_dup_map) {
2082                         pctx.errcode = e2fsck_allocate_block_bitmap(ctx->fs,
2083                                         _("multiply claimed block map"),
2084                                         EXT2FS_BMAP64_RBTREE, "block_dup_map",
2085                                         &ctx->block_dup_map);
2086                         if (pctx.errcode) {
2087                                 pctx.num = 3;
2088                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR,
2089                                             &pctx);
2090                                 /* Should never get here */
2091                                 ctx->flags |= E2F_FLAG_ABORT;
2092                                 return;
2093                         }
2094                 }
2095                 ext2fs_fast_mark_block_bitmap2(ctx->block_dup_map, block);
2096         } else {
2097                 ext2fs_fast_mark_block_bitmap2(ctx->block_found_map, block);
2098         }
2099 }
2100
2101 static _INLINE_ void mark_blocks_used(e2fsck_t ctx, blk64_t block,
2102                                       unsigned int num)
2103 {
2104         if (ext2fs_test_block_bitmap_range2(ctx->block_found_map, block, num))
2105                 ext2fs_mark_block_bitmap_range2(ctx->block_found_map, block, num);
2106         else
2107                 while (num--)
2108                         mark_block_used(ctx, block++);
2109 }
2110
2111 /*
2112  * Adjust the extended attribute block's reference counts at the end
2113  * of pass 1, either by subtracting out references for EA blocks that
2114  * are still referenced in ctx->refcount, or by adding references for
2115  * EA blocks that had extra references as accounted for in
2116  * ctx->refcount_extra.
2117  */
2118 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
2119                                     char *block_buf, int adjust_sign)
2120 {
2121         struct ext2_ext_attr_header     *header;
2122         struct problem_context          pctx;
2123         ext2_filsys                     fs = ctx->fs;
2124         blk64_t                         blk;
2125         __u32                           should_be;
2126         int                             count;
2127
2128         clear_problem_context(&pctx);
2129
2130         ea_refcount_intr_begin(refcount);
2131         while (1) {
2132                 if ((blk = ea_refcount_intr_next(refcount, &count)) == 0)
2133                         break;
2134                 pctx.blk = blk;
2135                 pctx.errcode = ext2fs_read_ext_attr3(fs, blk, block_buf,
2136                                                      pctx.ino);
2137                 if (pctx.errcode) {
2138                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
2139                         return;
2140                 }
2141                 header = (struct ext2_ext_attr_header *) block_buf;
2142                 pctx.blkcount = header->h_refcount;
2143                 should_be = header->h_refcount + adjust_sign * count;
2144                 pctx.num = should_be;
2145                 if (fix_problem(ctx, PR_1_EXTATTR_REFCOUNT, &pctx)) {
2146                         header->h_refcount = should_be;
2147                         pctx.errcode = ext2fs_write_ext_attr3(fs, blk,
2148                                                              block_buf,
2149                                                              pctx.ino);
2150                         if (pctx.errcode) {
2151                                 fix_problem(ctx, PR_1_EXTATTR_WRITE_ABORT,
2152                                             &pctx);
2153                                 continue;
2154                         }
2155                 }
2156         }
2157 }
2158
2159 /*
2160  * Handle processing the extended attribute blocks
2161  */
2162 static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx,
2163                            char *block_buf)
2164 {
2165         ext2_filsys fs = ctx->fs;
2166         ext2_ino_t      ino = pctx->ino;
2167         struct ext2_inode *inode = pctx->inode;
2168         blk64_t         blk;
2169         char *          end;
2170         struct ext2_ext_attr_header *header;
2171         struct ext2_ext_attr_entry *entry;
2172         int             count;
2173         region_t        region = 0;
2174         int             failed_csum = 0;
2175
2176         blk = ext2fs_file_acl_block(fs, inode);
2177         if (blk == 0)
2178                 return 0;
2179
2180         /*
2181          * If the Extended attribute flag isn't set, then a non-zero
2182          * file acl means that the inode is corrupted.
2183          *
2184          * Or if the extended attribute block is an invalid block,
2185          * then the inode is also corrupted.
2186          */
2187         if (!ext2fs_has_feature_xattr(fs->super) ||
2188             (blk < fs->super->s_first_data_block) ||
2189             (blk >= ext2fs_blocks_count(fs->super))) {
2190                 mark_inode_bad(ctx, ino);
2191                 return 0;
2192         }
2193
2194         /* If ea bitmap hasn't been allocated, create it */
2195         if (!ctx->block_ea_map) {
2196                 pctx->errcode = e2fsck_allocate_block_bitmap(fs,
2197                                         _("ext attr block map"),
2198                                         EXT2FS_BMAP64_RBTREE, "block_ea_map",
2199                                         &ctx->block_ea_map);
2200                 if (pctx->errcode) {
2201                         pctx->num = 2;
2202                         fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, pctx);
2203                         ctx->flags |= E2F_FLAG_ABORT;
2204                         return 0;
2205                 }
2206         }
2207
2208         /* Create the EA refcount structure if necessary */
2209         if (!ctx->refcount) {
2210                 pctx->errcode = ea_refcount_create(0, &ctx->refcount);
2211                 if (pctx->errcode) {
2212                         pctx->num = 1;
2213                         fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2214                         ctx->flags |= E2F_FLAG_ABORT;
2215                         return 0;
2216                 }
2217         }
2218
2219 #if 0
2220         /* Debugging text */
2221         printf("Inode %u has EA block %u\n", ino, blk);
2222 #endif
2223
2224         /* Have we seen this EA block before? */
2225         if (ext2fs_fast_test_block_bitmap2(ctx->block_ea_map, blk)) {
2226                 if (ea_refcount_decrement(ctx->refcount, blk, 0) == 0)
2227                         return 1;
2228                 /* Ooops, this EA was referenced more than it stated */
2229                 if (!ctx->refcount_extra) {
2230                         pctx->errcode = ea_refcount_create(0,
2231                                            &ctx->refcount_extra);
2232                         if (pctx->errcode) {
2233                                 pctx->num = 2;
2234                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2235                                 ctx->flags |= E2F_FLAG_ABORT;
2236                                 return 0;
2237                         }
2238                 }
2239                 ea_refcount_increment(ctx->refcount_extra, blk, 0);
2240                 return 1;
2241         }
2242
2243         /*
2244          * OK, we haven't seen this EA block yet.  So we need to
2245          * validate it
2246          */
2247         pctx->blk = blk;
2248         pctx->errcode = ext2fs_read_ext_attr3(fs, blk, block_buf, pctx->ino);
2249         if (pctx->errcode == EXT2_ET_EXT_ATTR_CSUM_INVALID) {
2250                 pctx->errcode = 0;
2251                 failed_csum = 1;
2252         } else if (pctx->errcode == EXT2_ET_BAD_EA_HEADER)
2253                 pctx->errcode = 0;
2254
2255         if (pctx->errcode &&
2256             fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx)) {
2257                 pctx->errcode = 0;
2258                 goto clear_extattr;
2259         }
2260         header = (struct ext2_ext_attr_header *) block_buf;
2261         pctx->blk = ext2fs_file_acl_block(fs, inode);
2262         if (((ctx->ext_attr_ver == 1) &&
2263              (header->h_magic != EXT2_EXT_ATTR_MAGIC_v1)) ||
2264             ((ctx->ext_attr_ver == 2) &&
2265              (header->h_magic != EXT2_EXT_ATTR_MAGIC))) {
2266                 if (fix_problem(ctx, PR_1_BAD_EA_BLOCK, pctx))
2267                         goto clear_extattr;
2268         }
2269
2270         if (header->h_blocks != 1) {
2271                 if (fix_problem(ctx, PR_1_EA_MULTI_BLOCK, pctx))
2272                         goto clear_extattr;
2273         }
2274
2275         if (pctx->errcode && fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx))
2276                 goto clear_extattr;
2277
2278         region = region_create(0, fs->blocksize);
2279         if (!region) {
2280                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
2281                 ctx->flags |= E2F_FLAG_ABORT;
2282                 return 0;
2283         }
2284         if (region_allocate(region, 0, sizeof(struct ext2_ext_attr_header))) {
2285                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2286                         goto clear_extattr;
2287         }
2288
2289         entry = (struct ext2_ext_attr_entry *)(header+1);
2290         end = block_buf + fs->blocksize;
2291         while ((char *)entry < end && *(__u32 *)entry) {
2292                 __u32 hash;
2293
2294                 if (region_allocate(region, (char *)entry - (char *)header,
2295                                    EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
2296                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2297                                 goto clear_extattr;
2298                         break;
2299                 }
2300                 if ((ctx->ext_attr_ver == 1 &&
2301                      (entry->e_name_len == 0 || entry->e_name_index != 0)) ||
2302                     (ctx->ext_attr_ver == 2 &&
2303                      entry->e_name_index == 0)) {
2304                         if (fix_problem(ctx, PR_1_EA_BAD_NAME, pctx))
2305                                 goto clear_extattr;
2306                         break;
2307                 }
2308                 if (entry->e_value_block != 0) {
2309                         if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2310                                 goto clear_extattr;
2311                 }
2312                 if (entry->e_value_offs + entry->e_value_size > fs->blocksize) {
2313                         if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2314                                 goto clear_extattr;
2315                         break;
2316                 }
2317                 if (entry->e_value_size &&
2318                     region_allocate(region, entry->e_value_offs,
2319                                     EXT2_EXT_ATTR_SIZE(entry->e_value_size))) {
2320                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2321                                 goto clear_extattr;
2322                 }
2323
2324                 hash = ext2fs_ext_attr_hash_entry(entry, block_buf +
2325                                                          entry->e_value_offs);
2326
2327                 if (entry->e_hash != hash) {
2328                         pctx->num = entry->e_hash;
2329                         if (fix_problem(ctx, PR_1_ATTR_HASH, pctx))
2330                                 goto clear_extattr;
2331                         entry->e_hash = hash;
2332                 }
2333
2334                 entry = EXT2_EXT_ATTR_NEXT(entry);
2335         }
2336         if (region_allocate(region, (char *)entry - (char *)header, 4)) {
2337                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2338                         goto clear_extattr;
2339         }
2340         region_free(region);
2341
2342         /*
2343          * We only get here if there was no other errors that were fixed.
2344          * If there was a checksum fail, ask to correct it.
2345          */
2346         if (failed_csum &&
2347             fix_problem(ctx, PR_1_EA_BLOCK_ONLY_CSUM_INVALID, pctx)) {
2348                 pctx->errcode = ext2fs_write_ext_attr3(fs, blk, block_buf,
2349                                                        pctx->ino);
2350                 if (pctx->errcode)
2351                         return 0;
2352         }
2353
2354         count = header->h_refcount - 1;
2355         if (count)
2356                 ea_refcount_store(ctx->refcount, blk, count);
2357         mark_block_used(ctx, blk);
2358         ext2fs_fast_mark_block_bitmap2(ctx->block_ea_map, blk);
2359         return 1;
2360
2361 clear_extattr:
2362         if (region)
2363                 region_free(region);
2364         ext2fs_file_acl_block_set(fs, inode, 0);
2365         e2fsck_write_inode(ctx, ino, inode, "check_ext_attr");
2366         return 0;
2367 }
2368
2369 /* Returns 1 if bad htree, 0 if OK */
2370 static int handle_htree(e2fsck_t ctx, struct problem_context *pctx,
2371                         ext2_ino_t ino, struct ext2_inode *inode,
2372                         char *block_buf)
2373 {
2374         struct ext2_dx_root_info        *root;
2375         ext2_filsys                     fs = ctx->fs;
2376         errcode_t                       retval;
2377         blk64_t                         blk;
2378
2379         if ((!LINUX_S_ISDIR(inode->i_mode) &&
2380              fix_problem(ctx, PR_1_HTREE_NODIR, pctx)) ||
2381             (!ext2fs_has_feature_dir_index(fs->super) &&
2382              fix_problem(ctx, PR_1_HTREE_SET, pctx)))
2383                 return 1;
2384
2385         pctx->errcode = ext2fs_bmap2(fs, ino, inode, 0, 0, 0, 0, &blk);
2386
2387         if ((pctx->errcode) ||
2388             (blk == 0) ||
2389             (blk < fs->super->s_first_data_block) ||
2390             (blk >= ext2fs_blocks_count(fs->super))) {
2391                 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2392                         return 1;
2393                 else
2394                         return 0;
2395         }
2396
2397         retval = io_channel_read_blk64(fs->io, blk, 1, block_buf);
2398         if (retval && fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2399                 return 1;
2400
2401         /* XXX should check that beginning matches a directory */
2402         root = (struct ext2_dx_root_info *) (block_buf + 24);
2403
2404         if ((root->reserved_zero || root->info_length < 8) &&
2405             fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2406                 return 1;
2407
2408         pctx->num = root->hash_version;
2409         if ((root->hash_version != EXT2_HASH_LEGACY) &&
2410             (root->hash_version != EXT2_HASH_HALF_MD4) &&
2411             (root->hash_version != EXT2_HASH_TEA) &&
2412             fix_problem(ctx, PR_1_HTREE_HASHV, pctx))
2413                 return 1;
2414
2415         if ((root->unused_flags & EXT2_HASH_FLAG_INCOMPAT) &&
2416             fix_problem(ctx, PR_1_HTREE_INCOMPAT, pctx))
2417                 return 1;
2418
2419         pctx->num = root->indirect_levels;
2420         if ((root->indirect_levels > 1) &&
2421             fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2422                 return 1;
2423
2424         return 0;
2425 }
2426
2427 void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino,
2428                         struct ext2_inode *inode, int restart_flag,
2429                         const char *source)
2430 {
2431         inode->i_flags = 0;
2432         inode->i_links_count = 0;
2433         ext2fs_icount_store(ctx->inode_link_info, ino, 0);
2434         inode->i_dtime = ctx->now;
2435
2436         /*
2437          * If a special inode has such rotten block mappings that we
2438          * want to clear the whole inode, be sure to actually zap
2439          * the block maps because i_links_count isn't checked for
2440          * special inodes, and we'll end up right back here the next
2441          * time we run fsck.
2442          */
2443         if (ino < EXT2_FIRST_INODE(ctx->fs->super))
2444                 memset(inode->i_block, 0, sizeof(inode->i_block));
2445
2446         ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
2447         ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
2448         if (ctx->inode_reg_map)
2449                 ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
2450         if (ctx->inode_bad_map)
2451                 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
2452
2453         /*
2454          * If the inode was partially accounted for before processing
2455          * was aborted, we need to restart the pass 1 scan.
2456          */
2457         ctx->flags |= restart_flag;
2458
2459         if (ino == EXT2_BAD_INO)
2460                 memset(inode, 0, sizeof(struct ext2_inode));
2461
2462         e2fsck_write_inode(ctx, ino, inode, source);
2463 }
2464
2465 /*
2466  * Use the multiple-blocks reclamation code to fix alignment problems in
2467  * a bigalloc filesystem.  We want a logical cluster to map to *only* one
2468  * physical cluster, and we want the block offsets within that cluster to
2469  * line up.
2470  */
2471 static int has_unaligned_cluster_map(e2fsck_t ctx,
2472                                      blk64_t last_pblk, e2_blkcnt_t last_lblk,
2473                                      blk64_t pblk, blk64_t lblk)
2474 {
2475         blk64_t cluster_mask;
2476
2477         if (!ctx->fs->cluster_ratio_bits)
2478                 return 0;
2479         cluster_mask = EXT2FS_CLUSTER_MASK(ctx->fs);
2480
2481         /*
2482          * If the block in the logical cluster doesn't align with the block in
2483          * the physical cluster...
2484          */
2485         if ((lblk & cluster_mask) != (pblk & cluster_mask))
2486                 return 1;
2487
2488         /*
2489          * If we cross a physical cluster boundary within a logical cluster...
2490          */
2491         if (last_pblk && (lblk & cluster_mask) != 0 &&
2492             EXT2FS_B2C(ctx->fs, lblk) == EXT2FS_B2C(ctx->fs, last_lblk) &&
2493             EXT2FS_B2C(ctx->fs, pblk) != EXT2FS_B2C(ctx->fs, last_pblk))
2494                 return 1;
2495
2496         return 0;
2497 }
2498
2499 static void scan_extent_node(e2fsck_t ctx, struct problem_context *pctx,
2500                              struct process_block_struct *pb,
2501                              blk64_t start_block, blk64_t end_block,
2502                              blk64_t eof_block,
2503                              ext2_extent_handle_t ehandle,
2504                              int try_repairs)
2505 {
2506         struct ext2fs_extent    extent;
2507         blk64_t                 blk, last_lblk;
2508         e2_blkcnt_t             blockcnt;
2509         unsigned int            i;
2510         int                     is_dir, is_leaf;
2511         problem_t               problem;
2512         struct ext2_extent_info info;
2513         int                     failed_csum = 0;
2514
2515         if (pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID)
2516                 failed_csum = 1;
2517
2518         pctx->errcode = ext2fs_extent_get_info(ehandle, &info);
2519         if (pctx->errcode)
2520                 return;
2521         if (!(ctx->options & E2F_OPT_FIXES_ONLY) &&
2522             !pb->eti.force_rebuild) {
2523                 struct extent_tree_level *etl;
2524
2525                 etl = pb->eti.ext_info + info.curr_level;
2526                 etl->num_extents += info.num_entries;
2527                 etl->max_extents += info.max_entries;
2528                 /*
2529                  * Implementation wart: Splitting extent blocks when appending
2530                  * will leave the old block with one free entry.  Therefore
2531                  * unless the node is totally full, pretend that a non-root
2532                  * extent block can hold one fewer entry than it actually does,
2533                  * so that we don't repeatedly rebuild the extent tree.
2534                  */
2535                 if (info.curr_level && info.num_entries < info.max_entries)
2536                         etl->max_extents--;
2537         }
2538
2539         pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_FIRST_SIB,
2540                                           &extent);
2541         while ((pctx->errcode == 0 ||
2542                 pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID) &&
2543                info.num_entries-- > 0) {
2544                 is_leaf = extent.e_flags & EXT2_EXTENT_FLAGS_LEAF;
2545                 is_dir = LINUX_S_ISDIR(pctx->inode->i_mode);
2546                 last_lblk = extent.e_lblk + extent.e_len - 1;
2547
2548                 problem = 0;
2549                 pctx->blk = extent.e_pblk;
2550                 pctx->blk2 = extent.e_lblk;
2551                 pctx->num = extent.e_len;
2552                 pctx->blkcount = extent.e_lblk + extent.e_len;
2553
2554                 if (extent.e_pblk == 0 ||
2555                     extent.e_pblk < ctx->fs->super->s_first_data_block ||
2556                     extent.e_pblk >= ext2fs_blocks_count(ctx->fs->super))
2557                         problem = PR_1_EXTENT_BAD_START_BLK;
2558                 else if (extent.e_lblk < start_block)
2559                         problem = PR_1_OUT_OF_ORDER_EXTENTS;
2560                 else if ((end_block && last_lblk > end_block) &&
2561                          (!(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT &&
2562                                 last_lblk > eof_block)))
2563                         problem = PR_1_EXTENT_END_OUT_OF_BOUNDS;
2564                 else if (is_leaf && extent.e_len == 0)
2565                         problem = PR_1_EXTENT_LENGTH_ZERO;
2566                 else if (is_leaf &&
2567                          (extent.e_pblk + extent.e_len) >
2568                          ext2fs_blocks_count(ctx->fs->super))
2569                         problem = PR_1_EXTENT_ENDS_BEYOND;
2570                 else if (is_leaf && is_dir &&
2571                          ((extent.e_lblk + extent.e_len) >
2572                           (1 << (21 - ctx->fs->super->s_log_block_size))))
2573                         problem = PR_1_TOOBIG_DIR;
2574
2575                 if (is_leaf && problem == 0 && extent.e_len > 0 &&
2576                     region_allocate(pb->region, extent.e_lblk, extent.e_len))
2577                         problem = PR_1_EXTENT_COLLISION;
2578
2579                 /*
2580                  * Uninitialized blocks in a directory?  Clear the flag and
2581                  * we'll interpret the blocks later.
2582                  */
2583                 if (try_repairs && is_dir && problem == 0 &&
2584                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
2585                     fix_problem(ctx, PR_1_UNINIT_DBLOCK, pctx)) {
2586                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
2587                         pb->inode_modified = 1;
2588                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
2589                                                               &extent);
2590                         if (pctx->errcode)
2591                                 return;
2592                         failed_csum = 0;
2593                 }
2594
2595                 if (try_repairs && problem) {
2596 report_problem:
2597                         if (fix_problem(ctx, problem, pctx)) {
2598                                 if (ctx->invalid_bitmaps) {
2599                                         /*
2600                                          * If fsck knows the bitmaps are bad,
2601                                          * skip to the next extent and
2602                                          * try to clear this extent again
2603                                          * after fixing the bitmaps, by
2604                                          * restarting fsck.
2605                                          */
2606                                         pctx->errcode = ext2fs_extent_get(
2607                                                           ehandle,
2608                                                           EXT2_EXTENT_NEXT_SIB,
2609                                                           &extent);
2610                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
2611                                         if (pctx->errcode ==
2612                                                     EXT2_ET_NO_CURRENT_NODE) {
2613                                                 pctx->errcode = 0;
2614                                                 break;
2615                                         }
2616                                         continue;
2617                                 }
2618                                 e2fsck_read_bitmaps(ctx);
2619                                 pb->inode_modified = 1;
2620                                 pctx->errcode =
2621                                         ext2fs_extent_delete(ehandle, 0);
2622                                 if (pctx->errcode) {
2623                                         pctx->str = "ext2fs_extent_delete";
2624                                         return;
2625                                 }
2626                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
2627                                 if (pctx->errcode &&
2628                                     pctx->errcode != EXT2_ET_NO_CURRENT_NODE) {
2629                                         pctx->str = "ext2fs_extent_fix_parents";
2630                                         return;
2631                                 }
2632                                 pctx->errcode = ext2fs_extent_get(ehandle,
2633                                                                   EXT2_EXTENT_CURRENT,
2634                                                                   &extent);
2635                                 if (pctx->errcode == EXT2_ET_NO_CURRENT_NODE) {
2636                                         pctx->errcode = 0;
2637                                         break;
2638                                 }
2639                                 failed_csum = 0;
2640                                 continue;
2641                         }
2642                         goto next;
2643                 }
2644
2645                 if (!is_leaf) {
2646                         blk64_t lblk = extent.e_lblk;
2647                         int next_try_repairs = 1;
2648
2649                         blk = extent.e_pblk;
2650
2651                         /*
2652                          * If this lower extent block collides with critical
2653                          * metadata, don't try to repair the damage.  Pass 1b
2654                          * will reallocate the block; then we can try again.
2655                          */
2656                         if (pb->ino != EXT2_RESIZE_INO &&
2657                             ext2fs_test_block_bitmap2(ctx->block_metadata_map,
2658                                                       extent.e_pblk)) {
2659                                 next_try_repairs = 0;
2660                                 pctx->blk = blk;
2661                                 fix_problem(ctx,
2662                                             PR_1_CRITICAL_METADATA_COLLISION,
2663                                             pctx);
2664                                 ctx->flags |= E2F_FLAG_RESTART_LATER;
2665                         }
2666                         pctx->errcode = ext2fs_extent_get(ehandle,
2667                                                   EXT2_EXTENT_DOWN, &extent);
2668                         if (pctx->errcode &&
2669                             pctx->errcode != EXT2_ET_EXTENT_CSUM_INVALID) {
2670                                 pctx->str = "EXT2_EXTENT_DOWN";
2671                                 problem = PR_1_EXTENT_HEADER_INVALID;
2672                                 if (!next_try_repairs)
2673                                         return;
2674                                 if (pctx->errcode == EXT2_ET_EXTENT_HEADER_BAD)
2675                                         goto report_problem;
2676                                 return;
2677                         }
2678                         /* The next extent should match this index's logical start */
2679                         if (extent.e_lblk != lblk) {
2680                                 struct ext2_extent_info e_info;
2681
2682                                 ext2fs_extent_get_info(ehandle, &e_info);
2683                                 pctx->blk = lblk;
2684                                 pctx->blk2 = extent.e_lblk;
2685                                 pctx->num = e_info.curr_level - 1;
2686                                 problem = PR_1_EXTENT_INDEX_START_INVALID;
2687                                 if (fix_problem(ctx, problem, pctx)) {
2688                                         pb->inode_modified = 1;
2689                                         pctx->errcode =
2690                                                 ext2fs_extent_fix_parents(ehandle);
2691                                         if (pctx->errcode) {
2692                                                 pctx->str = "ext2fs_extent_fix_parents";
2693                                                 return;
2694                                         }
2695                                 }
2696                         }
2697                         scan_extent_node(ctx, pctx, pb, extent.e_lblk,
2698                                          last_lblk, eof_block, ehandle,
2699                                          next_try_repairs);
2700                         if (pctx->errcode)
2701                                 return;
2702                         pctx->errcode = ext2fs_extent_get(ehandle,
2703                                                   EXT2_EXTENT_UP, &extent);
2704                         if (pctx->errcode) {
2705                                 pctx->str = "EXT2_EXTENT_UP";
2706                                 return;
2707                         }
2708                         mark_block_used(ctx, blk);
2709                         pb->num_blocks++;
2710                         goto next;
2711                 }
2712
2713                 if ((pb->previous_block != 0) &&
2714                     (pb->previous_block+1 != extent.e_pblk)) {
2715                         if (ctx->options & E2F_OPT_FRAGCHECK) {
2716                                 char type = '?';
2717
2718                                 if (pb->is_dir)
2719                                         type = 'd';
2720                                 else if (pb->is_reg)
2721                                         type = 'f';
2722
2723                                 printf(("%6lu(%c): expecting %6lu "
2724                                         "actual extent "
2725                                         "phys %6lu log %lu len %lu\n"),
2726                                        (unsigned long) pctx->ino, type,
2727                                        (unsigned long) pb->previous_block+1,
2728                                        (unsigned long) extent.e_pblk,
2729                                        (unsigned long) extent.e_lblk,
2730                                        (unsigned long) extent.e_len);
2731                         }
2732                         pb->fragmented = 1;
2733                 }
2734                 /*
2735                  * If we notice a gap in the logical block mappings of an
2736                  * extent-mapped directory, offer to close the hole by
2737                  * moving the logical block down, otherwise we'll go mad in
2738                  * pass 3 allocating empty directory blocks to fill the hole.
2739                  */
2740                 if (try_repairs && is_dir &&
2741                     pb->last_block + 1 < (e2_blkcnt_t)extent.e_lblk) {
2742                         blk64_t new_lblk;
2743
2744                         new_lblk = pb->last_block + 1;
2745                         if (EXT2FS_CLUSTER_RATIO(ctx->fs) > 1)
2746                                 new_lblk = ((new_lblk +
2747                                              EXT2FS_CLUSTER_RATIO(ctx->fs) - 1) &
2748                                             ~EXT2FS_CLUSTER_MASK(ctx->fs)) |
2749                                            (extent.e_pblk &
2750                                             EXT2FS_CLUSTER_MASK(ctx->fs));
2751                         pctx->blk = extent.e_lblk;
2752                         pctx->blk2 = new_lblk;
2753                         if (fix_problem(ctx, PR_1_COLLAPSE_DBLOCK, pctx)) {
2754                                 extent.e_lblk = new_lblk;
2755                                 pb->inode_modified = 1;
2756                                 pctx->errcode = ext2fs_extent_replace(ehandle,
2757                                                                 0, &extent);
2758                                 if (pctx->errcode) {
2759                                         pctx->errcode = 0;
2760                                         goto alloc_later;
2761                                 }
2762                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
2763                                 if (pctx->errcode)
2764                                         goto failed_add_dir_block;
2765                                 pctx->errcode = ext2fs_extent_goto(ehandle,
2766                                                                 extent.e_lblk);
2767                                 if (pctx->errcode)
2768                                         goto failed_add_dir_block;
2769                                 last_lblk = extent.e_lblk + extent.e_len - 1;
2770                                 failed_csum = 0;
2771                         }
2772                 }
2773 alloc_later:
2774                 while (is_dir && (++pb->last_db_block <
2775                                   (e2_blkcnt_t) extent.e_lblk)) {
2776                         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist,
2777                                                               pb->ino, 0,
2778                                                               pb->last_db_block);
2779                         if (pctx->errcode) {
2780                                 pctx->blk = 0;
2781                                 pctx->num = pb->last_db_block;
2782                                 goto failed_add_dir_block;
2783                         }
2784                 }
2785                 if (!ctx->fs->cluster_ratio_bits) {
2786                         mark_blocks_used(ctx, extent.e_pblk, extent.e_len);
2787                         pb->num_blocks += extent.e_len;
2788                 }
2789                 for (blk = extent.e_pblk, blockcnt = extent.e_lblk, i = 0;
2790                      i < extent.e_len;
2791                      blk++, blockcnt++, i++) {
2792                         if (ctx->fs->cluster_ratio_bits &&
2793                             !(pb->previous_block &&
2794                               (EXT2FS_B2C(ctx->fs, blk) ==
2795                                EXT2FS_B2C(ctx->fs, pb->previous_block)) &&
2796                               (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
2797                               ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
2798                                 mark_block_used(ctx, blk);
2799                                 pb->num_blocks++;
2800                         }
2801                         if (has_unaligned_cluster_map(ctx, pb->previous_block,
2802                                                       pb->last_block, blk,
2803                                                       blockcnt)) {
2804                                 pctx->blk = blockcnt;
2805                                 pctx->blk2 = blk;
2806                                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
2807                                 mark_block_used(ctx, blk);
2808                                 mark_block_used(ctx, blk);
2809                         }
2810                         pb->last_block = blockcnt;
2811                         pb->previous_block = blk;
2812
2813                         if (is_dir) {
2814                                 pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pctx->ino, blk, blockcnt);
2815                                 if (pctx->errcode) {
2816                                         pctx->blk = blk;
2817                                         pctx->num = blockcnt;
2818                                 failed_add_dir_block:
2819                                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
2820                                         /* Should never get here */
2821                                         ctx->flags |= E2F_FLAG_ABORT;
2822                                         return;
2823                                 }
2824                         }
2825                 }
2826                 if (is_dir && extent.e_len > 0)
2827                         pb->last_db_block = blockcnt - 1;
2828                 pb->previous_block = extent.e_pblk + extent.e_len - 1;
2829                 start_block = pb->last_block = last_lblk;
2830                 if (is_leaf && !is_dir &&
2831                     !(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT))
2832                         pb->last_init_lblock = last_lblk;
2833         next:
2834                 pctx->errcode = ext2fs_extent_get(ehandle,
2835                                                   EXT2_EXTENT_NEXT_SIB,
2836                                                   &extent);
2837         }
2838
2839         /* Failed csum but passes checks?  Ask to fix checksum. */
2840         if (failed_csum &&
2841             fix_problem(ctx, PR_1_EXTENT_ONLY_CSUM_INVALID, pctx)) {
2842                 pb->inode_modified = 1;
2843                 pctx->errcode = ext2fs_extent_replace(ehandle, 0, &extent);
2844                 if (pctx->errcode)
2845                         return;
2846         }
2847
2848         if (pctx->errcode == EXT2_ET_EXTENT_NO_NEXT)
2849                 pctx->errcode = 0;
2850 }
2851
2852 static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx,
2853                                  struct process_block_struct *pb)
2854 {
2855         struct ext2_extent_info info;
2856         struct ext2_inode       *inode = pctx->inode;
2857         ext2_extent_handle_t    ehandle;
2858         ext2_filsys             fs = ctx->fs;
2859         ext2_ino_t              ino = pctx->ino;
2860         errcode_t               retval;
2861         blk64_t                 eof_lblk;
2862         struct ext3_extent_header       *eh;
2863
2864         /* Check for a proper extent header... */
2865         eh = (struct ext3_extent_header *) &inode->i_block[0];
2866         retval = ext2fs_extent_header_verify(eh, sizeof(inode->i_block));
2867         if (retval) {
2868                 if (fix_problem(ctx, PR_1_MISSING_EXTENT_HEADER, pctx))
2869                         e2fsck_clear_inode(ctx, ino, inode, 0,
2870                                            "check_blocks_extents");
2871                 pctx->errcode = 0;
2872                 return;
2873         }
2874
2875         /* ...since this function doesn't fail if i_block is zeroed. */
2876         pctx->errcode = ext2fs_extent_open2(fs, ino, inode, &ehandle);
2877         if (pctx->errcode) {
2878                 if (fix_problem(ctx, PR_1_READ_EXTENT, pctx))
2879                         e2fsck_clear_inode(ctx, ino, inode, 0,
2880                                            "check_blocks_extents");
2881                 pctx->errcode = 0;
2882                 return;
2883         }
2884
2885         retval = ext2fs_extent_get_info(ehandle, &info);
2886         if (retval == 0) {
2887                 int max_depth = info.max_depth;
2888
2889                 if (max_depth >= MAX_EXTENT_DEPTH_COUNT)
2890                         max_depth = MAX_EXTENT_DEPTH_COUNT-1;
2891                 ctx->extent_depth_count[max_depth]++;
2892         }
2893
2894         /* Check maximum extent depth */
2895         pctx->blk = info.max_depth;
2896         pctx->blk2 = ext2fs_max_extent_depth(ehandle);
2897         if (pctx->blk2 < pctx->blk &&
2898             fix_problem(ctx, PR_1_EXTENT_BAD_MAX_DEPTH, pctx))
2899                 pb->eti.force_rebuild = 1;
2900
2901         /* Can we collect extent tree level stats? */
2902         pctx->blk = MAX_EXTENT_DEPTH_COUNT;
2903         if (pctx->blk2 > pctx->blk)
2904                 fix_problem(ctx, PR_1E_MAX_EXTENT_TREE_DEPTH, pctx);
2905         memset(pb->eti.ext_info, 0, sizeof(pb->eti.ext_info));
2906         pb->eti.ino = pb->ino;
2907
2908         pb->region = region_create(0, info.max_lblk);
2909         if (!pb->region) {
2910                 ext2fs_extent_free(ehandle);
2911                 fix_problem(ctx, PR_1_EXTENT_ALLOC_REGION_ABORT, pctx);
2912                 ctx->flags |= E2F_FLAG_ABORT;
2913                 return;
2914         }
2915
2916         eof_lblk = ((EXT2_I_SIZE(inode) + fs->blocksize - 1) >>
2917                 EXT2_BLOCK_SIZE_BITS(fs->super)) - 1;
2918         scan_extent_node(ctx, pctx, pb, 0, 0, eof_lblk, ehandle, 1);
2919         if (pctx->errcode &&
2920             fix_problem(ctx, PR_1_EXTENT_ITERATE_FAILURE, pctx)) {
2921                 pb->num_blocks = 0;
2922                 inode->i_blocks = 0;
2923                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
2924                                    "check_blocks_extents");
2925                 pctx->errcode = 0;
2926         }
2927         region_free(pb->region);
2928         pb->region = NULL;
2929         ext2fs_extent_free(ehandle);
2930
2931         /* Rebuild unless it's a dir and we're rehashing it */
2932         if (LINUX_S_ISDIR(inode->i_mode) &&
2933             e2fsck_dir_will_be_rehashed(ctx, ino))
2934                 return;
2935
2936         if (ctx->options & E2F_OPT_CONVERT_BMAP)
2937                 e2fsck_rebuild_extents_later(ctx, ino);
2938         else
2939                 e2fsck_should_rebuild_extents(ctx, pctx, &pb->eti, &info);
2940 }
2941
2942 /*
2943  * In fact we don't need to check blocks for an inode with inline data
2944  * because this inode doesn't have any blocks.  In this function all
2945  * we need to do is add this inode into dblist when it is a directory.
2946  */
2947 static void check_blocks_inline_data(e2fsck_t ctx, struct problem_context *pctx,
2948                                      struct process_block_struct *pb)
2949 {
2950         int     flags;
2951         size_t  inline_data_size = 0;
2952
2953         if (!pb->is_dir) {
2954                 pctx->errcode = 0;
2955                 return;
2956         }
2957
2958         /* Process the dirents in i_block[] as the "first" block. */
2959         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 0);
2960         if (pctx->errcode)
2961                 goto err;
2962
2963         /* Process the dirents in the EA as a "second" block. */
2964         flags = ctx->fs->flags;
2965         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
2966         pctx->errcode = ext2fs_inline_data_size(ctx->fs, pb->ino,
2967                                                 &inline_data_size);
2968         ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
2969                          (ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
2970         if (pctx->errcode) {
2971                 pctx->errcode = 0;
2972                 return;
2973         }
2974
2975         if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE)
2976                 return;
2977
2978         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 1);
2979         if (pctx->errcode)
2980                 goto err;
2981
2982         return;
2983 err:
2984         pctx->blk = 0;
2985         pctx->num = 0;
2986         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
2987         ctx->flags |= E2F_FLAG_ABORT;
2988 }
2989
2990 /*
2991  * This subroutine is called on each inode to account for all of the
2992  * blocks used by that inode.
2993  */
2994 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
2995                          char *block_buf)
2996 {
2997         ext2_filsys fs = ctx->fs;
2998         struct process_block_struct pb;
2999         ext2_ino_t      ino = pctx->ino;
3000         struct ext2_inode *inode = pctx->inode;
3001         unsigned        bad_size = 0;
3002         int             dirty_inode = 0;
3003         int             extent_fs;
3004         int             inlinedata_fs;
3005         __u64           size;
3006
3007         pb.ino = ino;
3008         pb.num_blocks = 0;
3009         pb.last_block = -1;
3010         pb.last_init_lblock = -1;
3011         pb.last_db_block = -1;
3012         pb.num_illegal_blocks = 0;
3013         pb.suppress = 0; pb.clear = 0;
3014         pb.fragmented = 0;
3015         pb.compressed = 0;
3016         pb.previous_block = 0;
3017         pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
3018         pb.is_reg = LINUX_S_ISREG(inode->i_mode);
3019         pb.max_blocks = 1 << (31 - fs->super->s_log_block_size);
3020         pb.inode = inode;
3021         pb.pctx = pctx;
3022         pb.ctx = ctx;
3023         pb.inode_modified = 0;
3024         pb.eti.force_rebuild = 0;
3025         pctx->ino = ino;
3026         pctx->errcode = 0;
3027
3028         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
3029         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
3030
3031         if (check_ext_attr(ctx, pctx, block_buf)) {
3032                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3033                         goto out;
3034                 pb.num_blocks++;
3035         }
3036
3037         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL))
3038                 check_blocks_inline_data(ctx, pctx, &pb);
3039         else if (ext2fs_inode_has_valid_blocks2(fs, inode)) {
3040                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL))
3041                         check_blocks_extents(ctx, pctx, &pb);
3042                 else {
3043                         int flags;
3044                         /*
3045                          * If we've modified the inode, write it out before
3046                          * iterate() tries to use it.
3047                          */
3048                         if (dirty_inode) {
3049                                 e2fsck_write_inode(ctx, ino, inode,
3050                                                    "check_blocks");
3051                                 dirty_inode = 0;
3052                         }
3053                         flags = fs->flags;
3054                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3055                         pctx->errcode = ext2fs_block_iterate3(fs, ino,
3056                                                 pb.is_dir ? BLOCK_FLAG_HOLE : 0,
3057                                                 block_buf, process_block, &pb);
3058                         /*
3059                          * We do not have uninitialized extents in non extent
3060                          * files.
3061                          */
3062                         pb.last_init_lblock = pb.last_block;
3063                         /*
3064                          * If iterate() changed a block mapping, we have to
3065                          * re-read the inode.  If we decide to clear the
3066                          * inode after clearing some stuff, we'll re-write the
3067                          * bad mappings into the inode!
3068                          */
3069                         if (pb.inode_modified)
3070                                 e2fsck_read_inode(ctx, ino, inode,
3071                                                   "check_blocks");
3072                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3073                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3074
3075                         if (ctx->options & E2F_OPT_CONVERT_BMAP) {
3076 #ifdef DEBUG
3077                                 printf("bmap rebuild ino=%d\n", ino);
3078 #endif
3079                                 if (!LINUX_S_ISDIR(inode->i_mode) ||
3080                                     !e2fsck_dir_will_be_rehashed(ctx, ino))
3081                                         e2fsck_rebuild_extents_later(ctx, ino);
3082                         }
3083                 }
3084         }
3085         end_problem_latch(ctx, PR_LATCH_BLOCK);
3086         end_problem_latch(ctx, PR_LATCH_TOOBIG);
3087         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3088                 goto out;
3089         if (pctx->errcode)
3090                 fix_problem(ctx, PR_1_BLOCK_ITERATE, pctx);
3091
3092         if (pb.fragmented && pb.num_blocks < fs->super->s_blocks_per_group) {
3093                 if (LINUX_S_ISDIR(inode->i_mode))
3094                         ctx->fs_fragmented_dir++;
3095                 else
3096                         ctx->fs_fragmented++;
3097         }
3098
3099         if (pb.clear) {
3100                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3101                                    "check_blocks");
3102                 return;
3103         }
3104
3105         if (inode->i_flags & EXT2_INDEX_FL) {
3106                 if (handle_htree(ctx, pctx, ino, inode, block_buf)) {
3107                         inode->i_flags &= ~EXT2_INDEX_FL;
3108                         dirty_inode++;
3109                 } else {
3110                         e2fsck_add_dx_dir(ctx, ino, pb.last_block+1);
3111                 }
3112         }
3113
3114         if (!pb.num_blocks && pb.is_dir &&
3115             !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
3116                 if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) {
3117                         e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks");
3118                         ctx->fs_directory_count--;
3119                         return;
3120                 }
3121         }
3122
3123         if (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super)) {
3124                 quota_data_add(ctx->qctx, inode, ino,
3125                                pb.num_blocks * fs->blocksize);
3126                 quota_data_inodes(ctx->qctx, inode, ino, +1);
3127         }
3128
3129         if (!ext2fs_has_feature_huge_file(fs->super) ||
3130             !(inode->i_flags & EXT4_HUGE_FILE_FL))
3131                 pb.num_blocks *= (fs->blocksize / 512);
3132         pb.num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
3133 #if 0
3134         printf("inode %u, i_size = %u, last_block = %lld, i_blocks=%llu, num_blocks = %llu\n",
3135                ino, inode->i_size, pb.last_block, ext2fs_inode_i_blocks(fs, inode),
3136                pb.num_blocks);
3137 #endif
3138         if (pb.is_dir) {
3139                 int nblock = inode->i_size >> EXT2_BLOCK_SIZE_BITS(fs->super);
3140                 if (inode->i_flags & EXT4_INLINE_DATA_FL) {
3141                         int flags;
3142                         size_t size;
3143                         errcode_t err;
3144
3145                         size = 0;
3146                         flags = ctx->fs->flags;
3147                         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3148                         err = ext2fs_inline_data_size(ctx->fs, pctx->ino,
3149                                                       &size);
3150                         ctx->fs->flags = (flags &
3151                                           EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3152                                          (ctx->fs->flags &
3153                                           ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3154                         if (err || size != inode->i_size) {
3155                                 bad_size = 7;
3156                                 pctx->num = size;
3157                         }
3158                 } else if (inode->i_size & (fs->blocksize - 1))
3159                         bad_size = 5;
3160                 else if (nblock > (pb.last_block + 1))
3161                         bad_size = 1;
3162                 else if (nblock < (pb.last_block + 1)) {
3163                         if (((pb.last_block + 1) - nblock) >
3164                             fs->super->s_prealloc_dir_blocks)
3165                                 bad_size = 2;
3166                 }
3167         } else {
3168                 e2_blkcnt_t blkpg = ctx->blocks_per_page;
3169
3170                 size = EXT2_I_SIZE(inode);
3171                 if ((pb.last_init_lblock >= 0) &&
3172                     /* allow allocated blocks to end of PAGE_SIZE */
3173                     (size < (__u64)pb.last_init_lblock * fs->blocksize) &&
3174                     (pb.last_init_lblock / blkpg * blkpg != pb.last_init_lblock ||
3175                      size < (__u64)(pb.last_init_lblock & ~(blkpg-1)) *
3176                      fs->blocksize))
3177                         bad_size = 3;
3178                 else if (!(extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3179                          size > ext2_max_sizes[fs->super->s_log_block_size])
3180                         /* too big for a direct/indirect-mapped file */
3181                         bad_size = 4;
3182                 else if ((extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3183                          size >
3184                          ((1ULL << (32 + EXT2_BLOCK_SIZE_BITS(fs->super))) - 1))
3185                         /* too big for an extent-based file - 32bit ee_block */
3186                         bad_size = 6;
3187         }
3188         /* i_size for symlinks is checked elsewhere */
3189         if (bad_size && !LINUX_S_ISLNK(inode->i_mode)) {
3190                 /* Did inline_data set pctx->num earlier? */
3191                 if (bad_size != 7)
3192                         pctx->num = (pb.last_block + 1) * fs->blocksize;
3193                 pctx->group = bad_size;
3194                 if (fix_problem(ctx, PR_1_BAD_I_SIZE, pctx)) {
3195                         if (LINUX_S_ISDIR(inode->i_mode))
3196                                 pctx->num &= 0xFFFFFFFFULL;
3197                         ext2fs_inode_size_set(fs, inode, pctx->num);
3198                         if (EXT2_I_SIZE(inode) == 0 &&
3199                             (inode->i_flags & EXT4_INLINE_DATA_FL)) {
3200                                 memset(inode->i_block, 0,
3201                                        sizeof(inode->i_block));
3202                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
3203                         }
3204                         dirty_inode++;
3205                 }
3206                 pctx->num = 0;
3207         }
3208         if (LINUX_S_ISREG(inode->i_mode) &&
3209             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
3210                 ctx->large_files++;
3211         if ((fs->super->s_creator_os == EXT2_OS_LINUX) &&
3212             ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) ||
3213              (ext2fs_has_feature_huge_file(fs->super) &&
3214               (inode->i_flags & EXT4_HUGE_FILE_FL) &&
3215               (inode->osd2.linux2.l_i_blocks_hi != 0)))) {
3216                 pctx->num = pb.num_blocks;
3217                 if (fix_problem(ctx, PR_1_BAD_I_BLOCKS, pctx)) {
3218                         inode->i_blocks = pb.num_blocks;
3219                         inode->osd2.linux2.l_i_blocks_hi = pb.num_blocks >> 32;
3220                         dirty_inode++;
3221                 }
3222                 pctx->num = 0;
3223         }
3224
3225         /*
3226          * The kernel gets mad if we ask it to allocate bigalloc clusters to
3227          * a block mapped file, so rebuild it as an extent file.  We can skip
3228          * symlinks because they're never rewritten.
3229          */
3230         if (ext2fs_has_feature_bigalloc(fs->super) &&
3231             (LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode)) &&
3232             ext2fs_inode_data_blocks2(fs, inode) > 0 &&
3233             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INO(fs->super)) &&
3234             !(inode->i_flags & (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)) &&
3235             fix_problem(ctx, PR_1_NO_BIGALLOC_BLOCKMAP_FILES, pctx)) {
3236                 pctx->errcode = e2fsck_rebuild_extents_later(ctx, ino);
3237                 if (pctx->errcode)
3238                         goto out;
3239         }
3240
3241         if (ctx->dirs_to_hash && pb.is_dir &&
3242             !(ctx->lost_and_found && ctx->lost_and_found == ino) &&
3243             !(inode->i_flags & EXT2_INDEX_FL) &&
3244             ((inode->i_size / fs->blocksize) >= 3))
3245                 e2fsck_rehash_dir_later(ctx, ino);
3246
3247 out:
3248         if (dirty_inode)
3249                 e2fsck_write_inode(ctx, ino, inode, "check_blocks");
3250 }
3251
3252 #if 0
3253 /*
3254  * Helper function called by process block when an illegal block is
3255  * found.  It returns a description about why the block is illegal
3256  */
3257 static char *describe_illegal_block(ext2_filsys fs, blk64_t block)
3258 {
3259         blk64_t super;
3260         int     i;
3261         static char     problem[80];
3262
3263         super = fs->super->s_first_data_block;
3264         strcpy(problem, "PROGRAMMING ERROR: Unknown reason for illegal block");
3265         if (block < super) {
3266                 sprintf(problem, "< FIRSTBLOCK (%u)", super);
3267                 return(problem);
3268         } else if (block >= ext2fs_blocks_count(fs->super)) {
3269                 sprintf(problem, "> BLOCKS (%u)", ext2fs_blocks_count(fs->super));
3270                 return(problem);
3271         }
3272         for (i = 0; i < fs->group_desc_count; i++) {
3273                 if (block == super) {
3274                         sprintf(problem, "is the superblock in group %d", i);
3275                         break;
3276                 }
3277                 if (block > super &&
3278                     block <= (super + fs->desc_blocks)) {
3279                         sprintf(problem, "is in the group descriptors "
3280                                 "of group %d", i);
3281                         break;
3282                 }
3283                 if (block == ext2fs_block_bitmap_loc(fs, i)) {
3284                         sprintf(problem, "is the block bitmap of group %d", i);
3285                         break;
3286                 }
3287                 if (block == ext2fs_inode_bitmap_loc(fs, i)) {
3288                         sprintf(problem, "is the inode bitmap of group %d", i);
3289                         break;
3290                 }
3291                 if (block >= ext2fs_inode_table_loc(fs, i) &&
3292                     (block < ext2fs_inode_table_loc(fs, i)
3293                      + fs->inode_blocks_per_group)) {
3294                         sprintf(problem, "is in the inode table of group %d",
3295                                 i);
3296                         break;
3297                 }
3298                 super += fs->super->s_blocks_per_group;
3299         }
3300         return(problem);
3301 }
3302 #endif
3303
3304 /*
3305  * This is a helper function for check_blocks().
3306  */
3307 static int process_block(ext2_filsys fs,
3308                   blk64_t       *block_nr,
3309                   e2_blkcnt_t blockcnt,
3310                   blk64_t ref_block EXT2FS_ATTR((unused)),
3311                   int ref_offset EXT2FS_ATTR((unused)),
3312                   void *priv_data)
3313 {
3314         struct process_block_struct *p;
3315         struct problem_context *pctx;
3316         blk64_t blk = *block_nr;
3317         int     ret_code = 0;
3318         problem_t       problem = 0;
3319         e2fsck_t        ctx;
3320
3321         p = (struct process_block_struct *) priv_data;
3322         pctx = p->pctx;
3323         ctx = p->ctx;
3324
3325         /*
3326          * For a directory, add logical block zero for processing even if it's
3327          * not mapped or we'll be perennially stuck with broken "." and ".."
3328          * entries.
3329          */
3330         if (p->is_dir && blockcnt == 0 && blk == 0) {
3331                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino, 0, 0);
3332                 if (pctx->errcode) {
3333                         pctx->blk = blk;
3334                         pctx->num = blockcnt;
3335                         goto failed_add_dir_block;
3336                 }
3337                 p->last_db_block++;
3338         }
3339
3340         if (blk == 0)
3341                 return 0;
3342
3343 #if 0
3344         printf("Process_block, inode %lu, block %u, #%d\n", p->ino, blk,
3345                blockcnt);
3346 #endif
3347
3348         /*
3349          * Simplistic fragmentation check.  We merely require that the
3350          * file be contiguous.  (Which can never be true for really
3351          * big files that are greater than a block group.)
3352          */
3353         if (p->previous_block && p->ino != EXT2_RESIZE_INO) {
3354                 if (p->previous_block+1 != blk) {
3355                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3356                                 char type = '?';
3357
3358                                 if (p->is_dir)
3359                                         type = 'd';
3360                                 else if (p->is_reg)
3361                                         type = 'f';
3362
3363                                 printf(_("%6lu(%c): expecting %6lu "
3364                                          "got phys %6lu (blkcnt %lld)\n"),
3365                                        (unsigned long) pctx->ino, type,
3366                                        (unsigned long) p->previous_block+1,
3367                                        (unsigned long) blk,
3368                                        blockcnt);
3369                         }
3370                         p->fragmented = 1;
3371                 }
3372         }
3373
3374         if (p->is_dir && blockcnt > (1 << (21 - fs->super->s_log_block_size)))
3375                 problem = PR_1_TOOBIG_DIR;
3376         if (p->is_reg && p->num_blocks+1 >= p->max_blocks)
3377                 problem = PR_1_TOOBIG_REG;
3378         if (!p->is_dir && !p->is_reg && blockcnt > 0)
3379                 problem = PR_1_TOOBIG_SYMLINK;
3380
3381         if (blk < fs->super->s_first_data_block ||
3382             blk >= ext2fs_blocks_count(fs->super))
3383                 problem = PR_1_ILLEGAL_BLOCK_NUM;
3384
3385         /*
3386          * If this IND/DIND/TIND block is squatting atop some critical metadata
3387          * (group descriptors, superblock, bitmap, inode table), any write to
3388          * "fix" mapping problems will destroy the metadata.  We'll let pass 1b
3389          * fix that and restart fsck.
3390          */
3391         if (blockcnt < 0 &&
3392             p->ino != EXT2_RESIZE_INO &&
3393             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk)) {
3394                 pctx->blk = blk;
3395                 fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx);
3396                 ctx->flags |= E2F_FLAG_RESTART_LATER;
3397         }
3398
3399         if (problem) {
3400                 p->num_illegal_blocks++;
3401                 /*
3402                  * A bit of subterfuge here -- we're trying to fix a block
3403                  * mapping, but the IND/DIND/TIND block could have collided
3404                  * with some critical metadata.  So, fix the in-core mapping so
3405                  * iterate won't go insane, but return 0 instead of
3406                  * BLOCK_CHANGED so that it won't write the remapping out to
3407                  * our multiply linked block.
3408                  *
3409                  * Even if we previously determined that an *IND block
3410                  * conflicts with critical metadata, we must still try to
3411                  * iterate the *IND block as if it is an *IND block to find and
3412                  * mark the blocks it points to.  Better to be overly cautious
3413                  * with the used_blocks map so that we don't move the *IND
3414                  * block to a block that's really in use!
3415                  */
3416                 if (p->ino != EXT2_RESIZE_INO &&
3417                     ref_block != 0 &&
3418                     ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3419                                               ref_block)) {
3420                         *block_nr = 0;
3421                         return 0;
3422                 }
3423                 if (!p->suppress && (p->num_illegal_blocks % 12) == 0) {
3424                         if (fix_problem(ctx, PR_1_TOO_MANY_BAD_BLOCKS, pctx)) {
3425                                 p->clear = 1;
3426                                 return BLOCK_ABORT;
3427                         }
3428                         if (fix_problem(ctx, PR_1_SUPPRESS_MESSAGES, pctx)) {
3429                                 p->suppress = 1;
3430                                 set_latch_flags(PR_LATCH_BLOCK,
3431                                                 PRL_SUPPRESS, 0);
3432                         }
3433                 }
3434                 pctx->blk = blk;
3435                 pctx->blkcount = blockcnt;
3436                 if (fix_problem(ctx, problem, pctx)) {
3437                         blk = *block_nr = 0;
3438                         ret_code = BLOCK_CHANGED;
3439                         p->inode_modified = 1;
3440                         /*
3441                          * If the directory block is too big and is beyond the
3442                          * end of the FS, don't bother trying to add it for
3443                          * processing -- the kernel would never have created a
3444                          * directory this large, and we risk an ENOMEM abort.
3445                          * In any case, the toobig handler for extent-based
3446                          * directories also doesn't feed toobig blocks to
3447                          * pass 2.
3448                          */
3449                         if (problem == PR_1_TOOBIG_DIR)
3450                                 return ret_code;
3451                         goto mark_dir;
3452                 } else
3453                         return 0;
3454         }
3455
3456         if (p->ino == EXT2_RESIZE_INO) {
3457                 /*
3458                  * The resize inode has already be sanity checked
3459                  * during pass #0 (the superblock checks).  All we
3460                  * have to do is mark the double indirect block as
3461                  * being in use; all of the other blocks are handled
3462                  * by mark_table_blocks()).
3463                  */
3464                 if (blockcnt == BLOCK_COUNT_DIND)
3465                         mark_block_used(ctx, blk);
3466                 p->num_blocks++;
3467         } else if (!(ctx->fs->cluster_ratio_bits &&
3468                      p->previous_block &&
3469                      (EXT2FS_B2C(ctx->fs, blk) ==
3470                       EXT2FS_B2C(ctx->fs, p->previous_block)) &&
3471                      (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
3472                      ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
3473                 mark_block_used(ctx, blk);
3474                 p->num_blocks++;
3475         } else if (has_unaligned_cluster_map(ctx, p->previous_block,
3476                                              p->last_block, blk, blockcnt)) {
3477                 pctx->blk = blockcnt;
3478                 pctx->blk2 = blk;
3479                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3480                 mark_block_used(ctx, blk);
3481                 mark_block_used(ctx, blk);
3482         }
3483         if (blockcnt >= 0)
3484                 p->last_block = blockcnt;
3485         p->previous_block = blk;
3486 mark_dir:
3487         if (p->is_dir && (blockcnt >= 0)) {
3488                 while (++p->last_db_block < blockcnt) {
3489                         pctx->errcode = ext2fs_add_dir_block2(fs->dblist,
3490                                                               p->ino, 0,
3491                                                               p->last_db_block);
3492                         if (pctx->errcode) {
3493                                 pctx->blk = 0;
3494                                 pctx->num = p->last_db_block;
3495                                 goto failed_add_dir_block;
3496                         }
3497                 }
3498                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino,
3499                                                       blk, blockcnt);
3500                 if (pctx->errcode) {
3501                         pctx->blk = blk;
3502                         pctx->num = blockcnt;
3503                 failed_add_dir_block:
3504                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3505                         /* Should never get here */
3506                         ctx->flags |= E2F_FLAG_ABORT;
3507                         return BLOCK_ABORT;
3508                 }
3509         }
3510         return ret_code;
3511 }
3512
3513 static int process_bad_block(ext2_filsys fs,
3514                       blk64_t *block_nr,
3515                       e2_blkcnt_t blockcnt,
3516                       blk64_t ref_block EXT2FS_ATTR((unused)),
3517                       int ref_offset EXT2FS_ATTR((unused)),
3518                       void *priv_data)
3519 {
3520         struct process_block_struct *p;
3521         blk64_t         blk = *block_nr;
3522         blk64_t         first_block;
3523         dgrp_t          i;
3524         struct problem_context *pctx;
3525         e2fsck_t        ctx;
3526
3527         if (!blk)
3528                 return 0;
3529
3530         p = (struct process_block_struct *) priv_data;
3531         ctx = p->ctx;
3532         pctx = p->pctx;
3533
3534         pctx->ino = EXT2_BAD_INO;
3535         pctx->blk = blk;
3536         pctx->blkcount = blockcnt;
3537
3538         if ((blk < fs->super->s_first_data_block) ||
3539             (blk >= ext2fs_blocks_count(fs->super))) {
3540                 if (fix_problem(ctx, PR_1_BB_ILLEGAL_BLOCK_NUM, pctx)) {
3541                         *block_nr = 0;
3542                         return BLOCK_CHANGED;
3543                 } else
3544                         return 0;
3545         }
3546
3547         if (blockcnt < 0) {
3548                 if (ext2fs_test_block_bitmap2(p->fs_meta_blocks, blk)) {
3549                         p->bbcheck = 1;
3550                         if (fix_problem(ctx, PR_1_BB_FS_BLOCK, pctx)) {
3551                                 *block_nr = 0;
3552                                 return BLOCK_CHANGED;
3553                         }
3554                 } else if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3555                                                     blk)) {
3556                         p->bbcheck = 1;
3557                         if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK,
3558                                         pctx)) {
3559                                 *block_nr = 0;
3560                                 return BLOCK_CHANGED;
3561                         }
3562                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3563                                 return BLOCK_ABORT;
3564                 } else
3565                         mark_block_used(ctx, blk);
3566                 return 0;
3567         }
3568 #if 0
3569         printf ("DEBUG: Marking %u as bad.\n", blk);
3570 #endif
3571         ctx->fs_badblocks_count++;
3572         /*
3573          * If the block is not used, then mark it as used and return.
3574          * If it is already marked as found, this must mean that
3575          * there's an overlap between the filesystem table blocks
3576          * (bitmaps and inode table) and the bad block list.
3577          */
3578         if (!ext2fs_test_block_bitmap2(ctx->block_found_map, blk)) {
3579                 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
3580                 return 0;
3581         }
3582         /*
3583          * Try to find the where the filesystem block was used...
3584          */
3585         first_block = fs->super->s_first_data_block;
3586
3587         for (i = 0; i < fs->group_desc_count; i++ ) {
3588                 pctx->group = i;
3589                 pctx->blk = blk;
3590                 if (!ext2fs_bg_has_super(fs, i))
3591                         goto skip_super;
3592                 if (blk == first_block) {
3593                         if (i == 0) {
3594                                 if (fix_problem(ctx,
3595                                                 PR_1_BAD_PRIMARY_SUPERBLOCK,
3596                                                 pctx)) {
3597                                         *block_nr = 0;
3598                                         return BLOCK_CHANGED;
3599                                 }
3600                                 return 0;
3601                         }
3602                         fix_problem(ctx, PR_1_BAD_SUPERBLOCK, pctx);
3603                         return 0;
3604                 }
3605                 if ((blk > first_block) &&
3606                     (blk <= first_block + fs->desc_blocks)) {
3607                         if (i == 0) {
3608                                 pctx->blk = *block_nr;
3609                                 if (fix_problem(ctx,
3610                         PR_1_BAD_PRIMARY_GROUP_DESCRIPTOR, pctx)) {
3611                                         *block_nr = 0;
3612                                         return BLOCK_CHANGED;
3613                                 }
3614                                 return 0;
3615                         }
3616                         fix_problem(ctx, PR_1_BAD_GROUP_DESCRIPTORS, pctx);
3617                         return 0;
3618                 }
3619         skip_super:
3620                 if (blk == ext2fs_block_bitmap_loc(fs, i)) {
3621                         if (fix_problem(ctx, PR_1_BB_BAD_BLOCK, pctx)) {
3622                                 ctx->invalid_block_bitmap_flag[i]++;
3623                                 ctx->invalid_bitmaps++;
3624                         }
3625                         return 0;
3626                 }
3627                 if (blk == ext2fs_inode_bitmap_loc(fs, i)) {
3628                         if (fix_problem(ctx, PR_1_IB_BAD_BLOCK, pctx)) {
3629                                 ctx->invalid_inode_bitmap_flag[i]++;
3630                                 ctx->invalid_bitmaps++;
3631                         }
3632                         return 0;
3633                 }
3634                 if ((blk >= ext2fs_inode_table_loc(fs, i)) &&
3635                     (blk < (ext2fs_inode_table_loc(fs, i) +
3636                             fs->inode_blocks_per_group))) {
3637                         /*
3638                          * If there are bad blocks in the inode table,
3639                          * the inode scan code will try to do
3640                          * something reasonable automatically.
3641                          */
3642                         return 0;
3643                 }
3644                 first_block += fs->super->s_blocks_per_group;
3645         }
3646         /*
3647          * If we've gotten to this point, then the only
3648          * possibility is that the bad block inode meta data
3649          * is using a bad block.
3650          */
3651         if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) ||
3652             (blk == p->inode->i_block[EXT2_DIND_BLOCK]) ||
3653             (blk == p->inode->i_block[EXT2_TIND_BLOCK])) {
3654                 p->bbcheck = 1;
3655                 if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, pctx)) {
3656                         *block_nr = 0;
3657                         return BLOCK_CHANGED;
3658                 }
3659                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3660                         return BLOCK_ABORT;
3661                 return 0;
3662         }
3663
3664         pctx->group = -1;
3665
3666         /* Warn user that the block wasn't claimed */
3667         fix_problem(ctx, PR_1_PROGERR_CLAIMED_BLOCK, pctx);
3668
3669         return 0;
3670 }
3671
3672 static void new_table_block(e2fsck_t ctx, blk64_t first_block, dgrp_t group,
3673                             const char *name, int num, blk64_t *new_block)
3674 {
3675         ext2_filsys fs = ctx->fs;
3676         dgrp_t          last_grp;
3677         blk64_t         old_block = *new_block;
3678         blk64_t         last_block;
3679         dgrp_t          flexbg;
3680         unsigned        flexbg_size;
3681         int             i, is_flexbg;
3682         char            *buf;
3683         struct problem_context  pctx;
3684
3685         clear_problem_context(&pctx);
3686
3687         pctx.group = group;
3688         pctx.blk = old_block;
3689         pctx.str = name;
3690
3691         /*
3692          * For flex_bg filesystems, first try to allocate the metadata
3693          * within the flex_bg, and if that fails then try finding the
3694          * space anywhere in the filesystem.
3695          */
3696         is_flexbg = ext2fs_has_feature_flex_bg(fs->super);
3697         if (is_flexbg) {
3698                 flexbg_size = 1 << fs->super->s_log_groups_per_flex;
3699                 flexbg = group / flexbg_size;
3700                 first_block = ext2fs_group_first_block2(fs,
3701                                                         flexbg_size * flexbg);
3702                 last_grp = group | (flexbg_size - 1);
3703                 if (last_grp >= fs->group_desc_count)
3704                         last_grp = fs->group_desc_count - 1;
3705                 last_block = ext2fs_group_last_block2(fs, last_grp);
3706         } else
3707                 last_block = ext2fs_group_last_block2(fs, group);
3708         pctx.errcode = ext2fs_get_free_blocks2(fs, first_block, last_block,
3709                                                num, ctx->block_found_map,
3710                                                new_block);
3711         if (is_flexbg && (pctx.errcode == EXT2_ET_BLOCK_ALLOC_FAIL))
3712                 pctx.errcode = ext2fs_get_free_blocks2(fs,
3713                                 fs->super->s_first_data_block,
3714                                 ext2fs_blocks_count(fs->super),
3715                                 num, ctx->block_found_map, new_block);
3716         if (pctx.errcode) {
3717                 pctx.num = num;
3718                 fix_problem(ctx, PR_1_RELOC_BLOCK_ALLOCATE, &pctx);
3719                 ext2fs_unmark_valid(fs);
3720                 ctx->flags |= E2F_FLAG_ABORT;
3721                 return;
3722         }
3723         pctx.errcode = ext2fs_get_mem(fs->blocksize, &buf);
3724         if (pctx.errcode) {
3725                 fix_problem(ctx, PR_1_RELOC_MEMORY_ALLOCATE, &pctx);
3726                 ext2fs_unmark_valid(fs);
3727                 ctx->flags |= E2F_FLAG_ABORT;
3728                 return;
3729         }
3730         ext2fs_mark_super_dirty(fs);
3731         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
3732         pctx.blk2 = *new_block;
3733         fix_problem(ctx, (old_block ? PR_1_RELOC_FROM_TO :
3734                           PR_1_RELOC_TO), &pctx);
3735         pctx.blk2 = 0;
3736         for (i = 0; i < num; i++) {
3737                 pctx.blk = i;
3738                 ext2fs_mark_block_bitmap2(ctx->block_found_map, (*new_block)+i);
3739                 if (old_block) {
3740                         pctx.errcode = io_channel_read_blk64(fs->io,
3741                                    old_block + i, 1, buf);
3742                         if (pctx.errcode)
3743                                 fix_problem(ctx, PR_1_RELOC_READ_ERR, &pctx);
3744                         pctx.blk = (*new_block) + i;
3745                         pctx.errcode = io_channel_write_blk64(fs->io, pctx.blk,
3746                                                               1, buf);
3747                 } else {
3748                         pctx.blk = (*new_block) + i;
3749                         pctx.errcode = ext2fs_zero_blocks2(fs, pctx.blk, 1,
3750                                                            NULL, NULL);
3751                 }
3752
3753                 if (pctx.errcode)
3754                         fix_problem(ctx, PR_1_RELOC_WRITE_ERR, &pctx);
3755         }
3756         ext2fs_free_mem(&buf);
3757 }
3758
3759 /*
3760  * This routine gets called at the end of pass 1 if bad blocks are
3761  * detected in the superblock, group descriptors, inode_bitmaps, or
3762  * block bitmaps.  At this point, all of the blocks have been mapped
3763  * out, so we can try to allocate new block(s) to replace the bad
3764  * blocks.
3765  */
3766 static void handle_fs_bad_blocks(e2fsck_t ctx)
3767 {
3768         ext2_filsys fs = ctx->fs;
3769         dgrp_t          i;
3770         blk64_t         first_block;
3771         blk64_t         new_blk;
3772
3773         for (i = 0; i < fs->group_desc_count; i++) {
3774                 first_block = ext2fs_group_first_block2(fs, i);
3775
3776                 if (ctx->invalid_block_bitmap_flag[i]) {
3777                         new_blk = ext2fs_block_bitmap_loc(fs, i);
3778                         new_table_block(ctx, first_block, i, _("block bitmap"),
3779                                         1, &new_blk);
3780                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
3781                 }
3782                 if (ctx->invalid_inode_bitmap_flag[i]) {
3783                         new_blk = ext2fs_inode_bitmap_loc(fs, i);
3784                         new_table_block(ctx, first_block, i, _("inode bitmap"),
3785                                         1, &new_blk);
3786                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
3787                 }
3788                 if (ctx->invalid_inode_table_flag[i]) {
3789                         new_blk = ext2fs_inode_table_loc(fs, i);
3790                         new_table_block(ctx, first_block, i, _("inode table"),
3791                                         fs->inode_blocks_per_group,
3792                                         &new_blk);
3793                         ext2fs_inode_table_loc_set(fs, i, new_blk);
3794                         ctx->flags |= E2F_FLAG_RESTART;
3795                 }
3796         }
3797         ctx->invalid_bitmaps = 0;
3798 }
3799
3800 /*
3801  * This routine marks all blocks which are used by the superblock,
3802  * group descriptors, inode bitmaps, and block bitmaps.
3803  */
3804 static void mark_table_blocks(e2fsck_t ctx)
3805 {
3806         ext2_filsys fs = ctx->fs;
3807         blk64_t b;
3808         dgrp_t  i;
3809         unsigned int    j;
3810         struct problem_context pctx;
3811
3812         clear_problem_context(&pctx);
3813
3814         for (i = 0; i < fs->group_desc_count; i++) {
3815                 pctx.group = i;
3816
3817                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_found_map);
3818                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_metadata_map);
3819
3820                 /*
3821                  * Mark the blocks used for the inode table
3822                  */
3823                 if (ext2fs_inode_table_loc(fs, i)) {
3824                         for (j = 0, b = ext2fs_inode_table_loc(fs, i);
3825                              j < fs->inode_blocks_per_group;
3826                              j++, b++) {
3827                                 if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3828                                                              b)) {
3829                                         pctx.blk = b;
3830                                         if (!ctx->invalid_inode_table_flag[i] &&
3831                                             fix_problem(ctx,
3832                                                 PR_1_ITABLE_CONFLICT, &pctx)) {
3833                                                 ctx->invalid_inode_table_flag[i]++;
3834                                                 ctx->invalid_bitmaps++;
3835                                         }
3836                                 } else {
3837                                     ext2fs_mark_block_bitmap2(
3838                                                 ctx->block_found_map, b);
3839                                     ext2fs_mark_block_bitmap2(
3840                                                 ctx->block_metadata_map, b);
3841                                 }
3842                         }
3843                 }
3844
3845                 /*
3846                  * Mark block used for the block bitmap
3847                  */
3848                 if (ext2fs_block_bitmap_loc(fs, i)) {
3849                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3850                                      ext2fs_block_bitmap_loc(fs, i))) {
3851                                 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
3852                                 if (fix_problem(ctx, PR_1_BB_CONFLICT, &pctx)) {
3853                                         ctx->invalid_block_bitmap_flag[i]++;
3854                                         ctx->invalid_bitmaps++;
3855                                 }
3856                         } else {
3857                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
3858                                      ext2fs_block_bitmap_loc(fs, i));
3859                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
3860                                      ext2fs_block_bitmap_loc(fs, i));
3861                         }
3862                 }
3863                 /*
3864                  * Mark block used for the inode bitmap
3865                  */
3866                 if (ext2fs_inode_bitmap_loc(fs, i)) {
3867                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3868                                      ext2fs_inode_bitmap_loc(fs, i))) {
3869                                 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
3870                                 if (fix_problem(ctx, PR_1_IB_CONFLICT, &pctx)) {
3871                                         ctx->invalid_inode_bitmap_flag[i]++;
3872                                         ctx->invalid_bitmaps++;
3873                                 }
3874                         } else {
3875                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
3876                                      ext2fs_inode_bitmap_loc(fs, i));
3877                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
3878                                      ext2fs_inode_bitmap_loc(fs, i));
3879                         }
3880                 }
3881         }
3882 }
3883
3884 /*
3885  * Thes subroutines short circuits ext2fs_get_blocks and
3886  * ext2fs_check_directory; we use them since we already have the inode
3887  * structure, so there's no point in letting the ext2fs library read
3888  * the inode again.
3889  */
3890 static errcode_t pass1_get_blocks(ext2_filsys fs, ext2_ino_t ino,
3891                                   blk_t *blocks)
3892 {
3893         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3894         int     i;
3895
3896         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
3897                 return EXT2_ET_CALLBACK_NOTHANDLED;
3898
3899         for (i=0; i < EXT2_N_BLOCKS; i++)
3900                 blocks[i] = ctx->stashed_inode->i_block[i];
3901         return 0;
3902 }
3903
3904 static errcode_t pass1_read_inode(ext2_filsys fs, ext2_ino_t ino,
3905                                   struct ext2_inode *inode)
3906 {
3907         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3908
3909         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
3910                 return EXT2_ET_CALLBACK_NOTHANDLED;
3911         *inode = *ctx->stashed_inode;
3912         return 0;
3913 }
3914
3915 static errcode_t pass1_write_inode(ext2_filsys fs, ext2_ino_t ino,
3916                             struct ext2_inode *inode)
3917 {
3918         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3919
3920         if ((ino == ctx->stashed_ino) && ctx->stashed_inode &&
3921                 (inode != ctx->stashed_inode))
3922                 *ctx->stashed_inode = *inode;
3923         return EXT2_ET_CALLBACK_NOTHANDLED;
3924 }
3925
3926 static errcode_t pass1_check_directory(ext2_filsys fs, ext2_ino_t ino)
3927 {
3928         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3929
3930         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
3931                 return EXT2_ET_CALLBACK_NOTHANDLED;
3932
3933         if (!LINUX_S_ISDIR(ctx->stashed_inode->i_mode))
3934                 return EXT2_ET_NO_DIRECTORY;
3935         return 0;
3936 }
3937
3938 static errcode_t e2fsck_get_alloc_block(ext2_filsys fs, blk64_t goal,
3939                                         blk64_t *ret)
3940 {
3941         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3942         errcode_t       retval;
3943         blk64_t         new_block;
3944
3945         if (ctx->block_found_map) {
3946                 retval = ext2fs_new_block2(fs, goal, ctx->block_found_map,
3947                                            &new_block);
3948                 if (retval)
3949                         return retval;
3950                 if (fs->block_map) {
3951                         ext2fs_mark_block_bitmap2(fs->block_map, new_block);
3952                         ext2fs_mark_bb_dirty(fs);
3953                 }
3954         } else {
3955                 if (!fs->block_map) {
3956                         retval = ext2fs_read_block_bitmap(fs);
3957                         if (retval)
3958                                 return retval;
3959                 }
3960
3961                 retval = ext2fs_new_block2(fs, goal, fs->block_map, &new_block);
3962                 if (retval)
3963                         return retval;
3964         }
3965
3966         *ret = new_block;
3967         return (0);
3968 }
3969
3970 static errcode_t e2fsck_new_range(ext2_filsys fs, int flags, blk64_t goal,
3971                                   blk64_t len, blk64_t *pblk, blk64_t *plen)
3972 {
3973         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3974         errcode_t       retval;
3975
3976         if (ctx->block_found_map)
3977                 return ext2fs_new_range(fs, flags, goal, len,
3978                                         ctx->block_found_map, pblk, plen);
3979
3980         if (!fs->block_map) {
3981                 retval = ext2fs_read_block_bitmap(fs);
3982                 if (retval)
3983                         return retval;
3984         }
3985
3986         return ext2fs_new_range(fs, flags, goal, len, fs->block_map,
3987                                 pblk, plen);
3988 }
3989
3990 static void e2fsck_block_alloc_stats(ext2_filsys fs, blk64_t blk, int inuse)
3991 {
3992         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3993
3994         /* Never free a critical metadata block */
3995         if (ctx->block_found_map &&
3996             ctx->block_metadata_map &&
3997             inuse < 0 &&
3998             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk))
3999                 return;
4000
4001         if (ctx->block_found_map) {
4002                 if (inuse > 0)
4003                         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4004                 else
4005                         ext2fs_unmark_block_bitmap2(ctx->block_found_map, blk);
4006         }
4007 }
4008
4009 static void e2fsck_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
4010                                            blk_t num, int inuse)
4011 {
4012         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4013
4014         /* Never free a critical metadata block */
4015         if (ctx->block_found_map &&
4016             ctx->block_metadata_map &&
4017             inuse < 0 &&
4018             ext2fs_test_block_bitmap_range2(ctx->block_metadata_map, blk, num))
4019                 return;
4020
4021         if (ctx->block_found_map) {
4022                 if (inuse > 0)
4023                         ext2fs_mark_block_bitmap_range2(ctx->block_found_map,
4024                                                         blk, num);
4025                 else
4026                         ext2fs_unmark_block_bitmap_range2(ctx->block_found_map,
4027                                                         blk, num);
4028         }
4029 }
4030
4031 void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts)
4032 {
4033         ext2_filsys fs = ctx->fs;
4034
4035         if (use_shortcuts) {
4036                 fs->get_blocks = pass1_get_blocks;
4037                 fs->check_directory = pass1_check_directory;
4038                 fs->read_inode = pass1_read_inode;
4039                 fs->write_inode = pass1_write_inode;
4040                 ctx->stashed_ino = 0;
4041         } else {
4042                 fs->get_blocks = 0;
4043                 fs->check_directory = 0;
4044                 fs->read_inode = 0;
4045                 fs->write_inode = 0;
4046         }
4047 }
4048
4049 void e2fsck_intercept_block_allocations(e2fsck_t ctx)
4050 {
4051         ext2fs_set_alloc_block_callback(ctx->fs, e2fsck_get_alloc_block, 0);
4052         ext2fs_set_block_alloc_stats_callback(ctx->fs,
4053                                                 e2fsck_block_alloc_stats, 0);
4054         ext2fs_set_new_range_callback(ctx->fs, e2fsck_new_range, NULL);
4055         ext2fs_set_block_alloc_stats_range_callback(ctx->fs,
4056                                         e2fsck_block_alloc_stats_range, NULL);
4057 }