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         blk64_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_large 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 int check_inode_extra_negative_epoch(__u32 xtime, __u32 extra) {
 452         return (xtime & (1 << 31)) != 0 &&
 453                 (extra & EXT4_EPOCH_MASK) == EXT4_EPOCH_MASK;
 454 }
 455
 456 #define CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, xtime) \
 457         check_inode_extra_negative_epoch(inode->i_##xtime, \
 458                                          inode->i_##xtime##_extra)
 459
 460 /* When today's date is earlier than 2242, we assume that atimes,
 461  * ctimes, crtimes, and mtimes with years in the range 2310..2378 are
 462  * actually pre-1970 dates mis-encoded.
 463  */
 464 #define EXT4_EXTRA_NEGATIVE_DATE_CUTOFF 2 * (1LL << 32)
 465
 466 static void check_inode_extra_space(e2fsck_t ctx, struct problem_context *pctx)
 467 {
 468         struct ext2_super_block *sb = ctx->fs->super;
 469         struct ext2_inode_large *inode;
 470         __u32 *eamagic;
 471         int min, max;
 472
 473         inode = (struct ext2_inode_large *) pctx->inode;
 474         if (EXT2_INODE_SIZE(sb) == EXT2_GOOD_OLD_INODE_SIZE) {
 475                 /* this isn't large inode. so, nothing to check */
 476                 return;
 477         }
 478
 479 #if 0
 480         printf("inode #%u, i_extra_size %d\n", pctx->ino,
 481                         inode->i_extra_isize);
 482 #endif
 483         /* i_extra_isize must cover i_extra_isize + i_checksum_hi at least */
 484         min = sizeof(inode->i_extra_isize) + sizeof(inode->i_checksum_hi);
 485         max = EXT2_INODE_SIZE(sb) - EXT2_GOOD_OLD_INODE_SIZE;
 486         /*
 487          * For now we will allow i_extra_isize to be 0, but really
 488          * implementations should never allow i_extra_isize to be 0
 489          */
 490         if (inode->i_extra_isize &&
 491             (inode->i_extra_isize < min || inode->i_extra_isize > max)) {
 492                 if (!fix_problem(ctx, PR_1_EXTRA_ISIZE, pctx))
 493                         return;
 494                 inode->i_extra_isize = min;
 495                 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 496                                         EXT2_INODE_SIZE(sb), "pass1");
 497                 return;
 498         }
 499
 500         /* check if there is no place for an EA header */
 501         if (inode->i_extra_isize >= max - sizeof(__u32))
 502                 return;
 503
 504         eamagic = (__u32 *) (((char *) inode) + EXT2_GOOD_OLD_INODE_SIZE +
 505                         inode->i_extra_isize);
 506         if (*eamagic == EXT2_EXT_ATTR_MAGIC) {
 507                 /* it seems inode has an extended attribute(s) in body */
 508                 check_ea_in_inode(ctx, pctx);
 509         }
 510
 511         /*
 512          * If the inode's extended atime (ctime, crtime, mtime) is stored in
 513          * the old, invalid format, repair it.
 514          */
 515         if (((sizeof(time_t) <= 4) ||
 516              ((sizeof(time_t) > 4) &&
 517               ctx->now < EXT4_EXTRA_NEGATIVE_DATE_CUTOFF)) &&
 518             (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime) ||
 519              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime) ||
 520              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime) ||
 521              CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))) {
 522
 523                 if (!fix_problem(ctx, PR_1_EA_TIME_OUT_OF_RANGE, pctx))
 524                         return;
 525
 526                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, atime))
 527                         inode->i_atime_extra &= ~EXT4_EPOCH_MASK;
 528                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, ctime))
 529                         inode->i_ctime_extra &= ~EXT4_EPOCH_MASK;
 530                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, crtime))
 531                         inode->i_crtime_extra &= ~EXT4_EPOCH_MASK;
 532                 if (CHECK_INODE_EXTRA_NEGATIVE_EPOCH(inode, mtime))
 533                         inode->i_mtime_extra &= ~EXT4_EPOCH_MASK;
 534                 e2fsck_write_inode_full(ctx, pctx->ino, pctx->inode,
 535                                         EXT2_INODE_SIZE(sb), "pass1");
 536         }
 537
 538 }
 539
 540 /*
 541  * Check to see if the inode might really be a directory, despite i_mode
 542  *
 543  * This is a lot of complexity for something for which I'm not really
 544  * convinced happens frequently in the wild.  If for any reason this
 545  * causes any problems, take this code out.
 546  * [tytso:20070331.0827EDT]
 547  */
 548 static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx,
 549                                 char *buf)
 550 {
 551         struct ext2_inode *inode = pctx->inode;
 552         struct ext2_dir_entry   *dirent;
 553         errcode_t               retval;
 554         blk64_t                 blk;
 555         unsigned int            i, rec_len, not_device = 0;
 556         int                     extent_fs;
 557         int                     inlinedata_fs;
 558
 559         /*
 560          * If the mode looks OK, we believe it.  If the first block in
 561          * the i_block array is 0, this cannot be a directory. If the
 562          * inode is extent-mapped, it is still the case that the latter
 563          * cannot be 0 - the magic number in the extent header would make
 564          * it nonzero.
 565          */
 566         if (LINUX_S_ISDIR(inode->i_mode) || LINUX_S_ISREG(inode->i_mode) ||
 567             LINUX_S_ISLNK(inode->i_mode) || inode->i_block[0] == 0)
 568                 return;
 569
 570         /*
 571          * Check the block numbers in the i_block array for validity:
 572          * zero blocks are skipped (but the first one cannot be zero -
 573          * see above), other blocks are checked against the first and
 574          * max data blocks (from the the superblock) and against the
 575          * block bitmap. Any invalid block found means this cannot be
 576          * a directory.
 577          *
 578          * If there are non-zero blocks past the fourth entry, then
 579          * this cannot be a device file: we remember that for the next
 580          * check.
 581          *
 582          * For extent mapped files, we don't do any sanity checking:
 583          * just try to get the phys block of logical block 0 and run
 584          * with it.
 585          *
 586          * For inline data files, we just try to get the size of inline
 587          * data.  If it's true, we will treat it as a directory.
 588          */
 589
 590         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
 591         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
 592         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL)) {
 593                 size_t size;
 594                 __u32 dotdot;
 595                 unsigned int rec_len2;
 596                 struct ext2_dir_entry de;
 597
 598                 if (ext2fs_inline_data_size(ctx->fs, pctx->ino, &size))
 599                         return;
 600                 /*
 601                  * If the size isn't a multiple of 4, it's probably not a
 602                  * directory??
 603                  */
 604                 if (size & 3)
 605                         return;
 606                 /*
 607                  * If the first 10 bytes don't look like a directory entry,
 608                  * it's probably not a directory.
 609                  */
 610                 memcpy(&dotdot, inode->i_block, sizeof(dotdot));
 611                 memcpy(&de, ((char *)inode->i_block) + EXT4_INLINE_DATA_DOTDOT_SIZE,
 612                        EXT2_DIR_REC_LEN(0));
 613                 dotdot = ext2fs_le32_to_cpu(dotdot);
 614                 de.inode = ext2fs_le32_to_cpu(de.inode);
 615                 de.rec_len = ext2fs_le16_to_cpu(de.rec_len);
 616                 ext2fs_get_rec_len(ctx->fs, &de, &rec_len2);
 617                 if (dotdot >= ctx->fs->super->s_inodes_count ||
 618                     (dotdot < EXT2_FIRST_INO(ctx->fs->super) &&
 619                      dotdot != EXT2_ROOT_INO) ||
 620                     de.inode >= ctx->fs->super->s_inodes_count ||
 621                     (de.inode < EXT2_FIRST_INO(ctx->fs->super) &&
 622                      de.inode != 0) ||
 623                     rec_len2 > EXT4_MIN_INLINE_DATA_SIZE -
 624                               EXT4_INLINE_DATA_DOTDOT_SIZE)
 625                         return;
 626                 /* device files never have a "system.data" entry */
 627                 goto isdir;
 628         } else if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) {
 629                 /* extent mapped */
 630                 if  (ext2fs_bmap2(ctx->fs, pctx->ino, inode, 0, 0, 0, 0,
 631                                  &blk))
 632                         return;
 633                 /* device files are never extent mapped */
 634                 not_device++;
 635         } else {
 636                 for (i=0; i < EXT2_N_BLOCKS; i++) {
 637                         blk = inode->i_block[i];
 638                         if (!blk)
 639                                 continue;
 640                         if (i >= 4)
 641                                 not_device++;
 642
 643                         if (blk < ctx->fs->super->s_first_data_block ||
 644                             blk >= ext2fs_blocks_count(ctx->fs->super) ||
 645                             ext2fs_fast_test_block_bitmap2(ctx->block_found_map,
 646                                                            blk))
 647                                 return; /* Invalid block, can't be dir */
 648                 }
 649                 blk = inode->i_block[0];
 650         }
 651
 652         /*
 653          * If the mode says this is a device file and the i_links_count field
 654          * is sane and we have not ruled it out as a device file previously,
 655          * we declare it a device file, not a directory.
 656          */
 657         if ((LINUX_S_ISCHR(inode->i_mode) || LINUX_S_ISBLK(inode->i_mode)) &&
 658             (inode->i_links_count == 1) && !not_device)
 659                 return;
 660
 661         /* read the first block */
 662         ehandler_operation(_("reading directory block"));
 663         retval = ext2fs_read_dir_block4(ctx->fs, blk, buf, 0, pctx->ino);
 664         ehandler_operation(0);
 665         if (retval)
 666                 return;
 667
 668         dirent = (struct ext2_dir_entry *) buf;
 669         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 670         if (retval)
 671                 return;
 672         if ((ext2fs_dirent_name_len(dirent) != 1) ||
 673             (dirent->name[0] != '.') ||
 674             (dirent->inode != pctx->ino) ||
 675             (rec_len < 12) ||
 676             (rec_len % 4) ||
 677             (rec_len >= ctx->fs->blocksize - 12))
 678                 return;
 679
 680         dirent = (struct ext2_dir_entry *) (buf + rec_len);
 681         retval = ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
 682         if (retval)
 683                 return;
 684         if ((ext2fs_dirent_name_len(dirent) != 2) ||
 685             (dirent->name[0] != '.') ||
 686             (dirent->name[1] != '.') ||
 687             (rec_len < 12) ||
 688             (rec_len % 4))
 689                 return;
 690
 691 isdir:
 692         if (fix_problem(ctx, PR_1_TREAT_AS_DIRECTORY, pctx)) {
 693                 inode->i_mode = (inode->i_mode & 07777) | LINUX_S_IFDIR;
 694                 e2fsck_write_inode_full(ctx, pctx->ino, inode,
 695                                         EXT2_INODE_SIZE(ctx->fs->super),
 696                                         "check_is_really_dir");
 697         }
 698 }
 699
 700 void e2fsck_setup_tdb_icount(e2fsck_t ctx, int flags,
 701                              ext2_icount_t *ret)
 702 {
 703         unsigned int            threshold;
 704         ext2_ino_t              num_dirs;
 705         errcode_t               retval;
 706         char                    *tdb_dir;
 707         int                     enable;
 708
 709         *ret = 0;
 710
 711         profile_get_string(ctx->profile, "scratch_files", "directory", 0, 0,
 712                            &tdb_dir);
 713         profile_get_uint(ctx->profile, "scratch_files",
 714                          "numdirs_threshold", 0, 0, &threshold);
 715         profile_get_boolean(ctx->profile, "scratch_files",
 716                             "icount", 0, 1, &enable);
 717
 718         retval = ext2fs_get_num_dirs(ctx->fs, &num_dirs);
 719         if (retval)
 720                 num_dirs = 1024;        /* Guess */
 721
 722         if (!enable || !tdb_dir || access(tdb_dir, W_OK) ||
 723             (threshold && num_dirs <= threshold))
 724                 return;
 725
 726         retval = ext2fs_create_icount_tdb(ctx->fs, tdb_dir, flags, ret);
 727         if (retval)
 728                 *ret = 0;
 729 }
 730
 731 static errcode_t recheck_bad_inode_checksum(ext2_filsys fs, ext2_ino_t ino,
 732                                             e2fsck_t ctx,
 733                                             struct problem_context *pctx)
 734 {
 735         errcode_t retval;
 736         struct ext2_inode_large inode;
 737
 738         /*
 739          * Reread inode.  If we don't see checksum error, then this inode
 740          * has been fixed elsewhere.
 741          */
 742         ctx->stashed_ino = 0;
 743         retval = ext2fs_read_inode_full(fs, ino, (struct ext2_inode *)&inode,
 744                                         sizeof(inode));
 745         if (retval && retval != EXT2_ET_INODE_CSUM_INVALID)
 746                 return retval;
 747         if (!retval)
 748                 return 0;
 749
 750         /*
 751          * Checksum still doesn't match.  That implies that the inode passes
 752          * all the sanity checks, so maybe the checksum is simply corrupt.
 753          * See if the user will go for fixing that.
 754          */
 755         if (!fix_problem(ctx, PR_1_INODE_ONLY_CSUM_INVALID, pctx))
 756                 return 0;
 757
 758         retval = ext2fs_write_inode_full(fs, ino, (struct ext2_inode *)&inode,
 759                                          sizeof(inode));
 760         return retval;
 761 }
 762
 763 static void reserve_block_for_root_repair(e2fsck_t ctx)
 764 {
 765         blk64_t         blk = 0;
 766         errcode_t       err;
 767         ext2_filsys     fs = ctx->fs;
 768
 769         ctx->root_repair_block = 0;
 770         if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO))
 771                 return;
 772
 773         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 774         if (err)
 775                 return;
 776         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 777         ctx->root_repair_block = blk;
 778 }
 779
 780 static void reserve_block_for_lnf_repair(e2fsck_t ctx)
 781 {
 782         blk64_t         blk = 0;
 783         errcode_t       err;
 784         ext2_filsys     fs = ctx->fs;
 785         static const char name[] = "lost+found";
 786         ext2_ino_t      ino;
 787
 788         ctx->lnf_repair_block = 0;
 789         if (!ext2fs_lookup(fs, EXT2_ROOT_INO, name, sizeof(name)-1, 0, &ino))
 790                 return;
 791
 792         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 793         if (err)
 794                 return;
 795         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 796         ctx->lnf_repair_block = blk;
 797 }
 798
 799 static errcode_t get_inline_data_ea_size(ext2_filsys fs, ext2_ino_t ino,
 800                                          size_t *sz)
 801 {
 802         void *p;
 803         struct ext2_xattr_handle *handle;
 804         errcode_t retval;
 805
 806         retval = ext2fs_xattrs_open(fs, ino, &handle);
 807         if (retval)
 808                 return retval;
 809
 810         retval = ext2fs_xattrs_read(handle);
 811         if (retval)
 812                 goto err;
 813
 814         retval = ext2fs_xattr_get(handle, "system.data", &p, sz);
 815         if (retval)
 816                 goto err;
 817         ext2fs_free_mem(&p);
 818 err:
 819         (void) ext2fs_xattrs_close(&handle);
 820         return retval;
 821 }
 822
 823 static void finish_processing_inode(e2fsck_t ctx, ext2_ino_t ino,
 824                                     struct problem_context *pctx,
 825                                     int failed_csum)
 826 {
 827         if (!failed_csum)
 828                 return;
 829
 830         /*
 831          * If the inode failed the checksum and the user didn't
 832          * clear the inode, test the checksum again -- if it still
 833          * fails, ask the user if the checksum should be corrected.
 834          */
 835         pctx->errcode = recheck_bad_inode_checksum(ctx->fs, ino, ctx, pctx);
 836         if (pctx->errcode)
 837                 ctx->flags |= E2F_FLAG_ABORT;
 838 }
 839 #define FINISH_INODE_LOOP(ctx, ino, pctx, failed_csum) \
 840         do { \
 841                 finish_processing_inode((ctx), (ino), (pctx), (failed_csum)); \
 842                 if ((ctx)->flags & E2F_FLAG_ABORT) \
 843                         return; \
 844         } while (0)
 845
 846 static int could_be_block_map(ext2_filsys fs, struct ext2_inode *inode)
 847 {
 848         __u32 x;
 849         int i;
 850
 851         for (i = 0; i < EXT2_N_BLOCKS; i++) {
 852                 x = inode->i_block[i];
 853 #ifdef WORDS_BIGENDIAN
 854                 x = ext2fs_swab32(x);
 855 #endif
 856                 if (x >= ext2fs_blocks_count(fs->super))
 857                         return 0;
 858         }
 859
 860         return 1;
 861 }
 862
 863 /*
 864  * Figure out what to do with an inode that has both extents and inline data
 865  * inode flags set.  Returns -1 if we decide to erase the inode, 0 otherwise.
 866  */
 867 static int fix_inline_data_extents_file(e2fsck_t ctx,
 868                                         ext2_ino_t ino,
 869                                         struct ext2_inode *inode,
 870                                         int inode_size,
 871                                         struct problem_context *pctx)
 872 {
 873         size_t max_inline_ea_size;
 874         ext2_filsys fs = ctx->fs;
 875         int dirty = 0;
 876
 877         /* Both feature flags not set?  Just run the regular checks */
 878         if (!ext2fs_has_feature_extents(fs->super) &&
 879             !ext2fs_has_feature_inline_data(fs->super))
 880                 return 0;
 881
 882         /* Clear both flags if it's a special file */
 883         if (LINUX_S_ISCHR(inode->i_mode) ||
 884             LINUX_S_ISBLK(inode->i_mode) ||
 885             LINUX_S_ISFIFO(inode->i_mode) ||
 886             LINUX_S_ISSOCK(inode->i_mode)) {
 887                 check_extents_inlinedata(ctx, pctx);
 888                 return 0;
 889         }
 890
 891         /* If it looks like an extent tree, try to clear inlinedata */
 892         if (ext2fs_extent_header_verify(inode->i_block,
 893                                  sizeof(inode->i_block)) == 0 &&
 894             fix_problem(ctx, PR_1_CLEAR_INLINE_DATA_FOR_EXTENT, pctx)) {
 895                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
 896                 dirty = 1;
 897                 goto out;
 898         }
 899
 900         /* If it looks short enough to be inline data, try to clear extents */
 901         if (inode_size > EXT2_GOOD_OLD_INODE_SIZE)
 902                 max_inline_ea_size = inode_size -
 903                                      (EXT2_GOOD_OLD_INODE_SIZE +
 904                                       ((struct ext2_inode_large *)inode)->i_extra_isize);
 905         else
 906                 max_inline_ea_size = 0;
 907         if (EXT2_I_SIZE(inode) <
 908             EXT4_MIN_INLINE_DATA_SIZE + max_inline_ea_size &&
 909             fix_problem(ctx, PR_1_CLEAR_EXTENT_FOR_INLINE_DATA, pctx)) {
 910                 inode->i_flags &= ~EXT4_EXTENTS_FL;
 911                 dirty = 1;
 912                 goto out;
 913         }
 914
 915         /*
 916          * Too big for inline data, but no evidence of extent tree -
 917          * maybe it's a block map file?  If the mappings all look valid?
 918          */
 919         if (could_be_block_map(fs, inode) &&
 920             fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_FLAGS, pctx)) {
 921 #ifdef WORDS_BIGENDIAN
 922                 int i;
 923
 924                 for (i = 0; i < EXT2_N_BLOCKS; i++)
 925                         inode->i_block[i] = ext2fs_swab32(inode->i_block[i]);
 926 #endif
 927
 928                 inode->i_flags &= ~(EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL);
 929                 dirty = 1;
 930                 goto out;
 931         }
 932
 933         /* Oh well, just clear the busted inode. */
 934         if (fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_INODE, pctx)) {
 935                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
 936                 return -1;
 937         }
 938
 939 out:
 940         if (dirty)
 941                 e2fsck_write_inode(ctx, ino, inode, "pass1");
 942
 943         return 0;
 944 }
 945
 946 static void pass1_readahead(e2fsck_t ctx, dgrp_t *group, ext2_ino_t *next_ino)
 947 {
 948         ext2_ino_t inodes_in_group = 0, inodes_per_block, inodes_per_buffer;
 949         dgrp_t start = *group, grp;
 950         blk64_t blocks_to_read = 0;
 951         errcode_t err = EXT2_ET_INVALID_ARGUMENT;
 952
 953         if (ctx->readahead_kb == 0)
 954                 goto out;
 955
 956         /* Keep iterating groups until we have enough to readahead */
 957         inodes_per_block = EXT2_INODES_PER_BLOCK(ctx->fs->super);
 958         for (grp = start; grp < ctx->fs->group_desc_count; grp++) {
 959                 if (ext2fs_bg_flags_test(ctx->fs, grp, EXT2_BG_INODE_UNINIT))
 960                         continue;
 961                 inodes_in_group = ctx->fs->super->s_inodes_per_group -
 962                                         ext2fs_bg_itable_unused(ctx->fs, grp);
 963                 blocks_to_read += (inodes_in_group + inodes_per_block - 1) /
 964                                         inodes_per_block;
 965                 if (blocks_to_read * ctx->fs->blocksize >
 966                     ctx->readahead_kb * 1024)
 967                         break;
 968         }
 969
 970         err = e2fsck_readahead(ctx->fs, E2FSCK_READA_ITABLE, start,
 971                                grp - start + 1);
 972         if (err == EAGAIN) {
 973                 ctx->readahead_kb /= 2;
 974                 err = 0;
 975         }
 976
 977 out:
 978         if (err) {
 979                 /* Error; disable itable readahead */
 980                 *group = ctx->fs->group_desc_count;
 981                 *next_ino = ctx->fs->super->s_inodes_count;
 982         } else {
 983                 /*
 984                  * Don't do more readahead until we've reached the first inode
 985                  * of the last inode scan buffer block for the last group.
 986                  */
 987                 *group = grp + 1;
 988                 inodes_per_buffer = (ctx->inode_buffer_blocks ?
 989                                      ctx->inode_buffer_blocks :
 990                                      EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS) *
 991                                     ctx->fs->blocksize /
 992                                     EXT2_INODE_SIZE(ctx->fs->super);
 993                 inodes_in_group--;
 994                 *next_ino = inodes_in_group -
 995                             (inodes_in_group % inodes_per_buffer) + 1 +
 996                             (grp * ctx->fs->super->s_inodes_per_group);
 997         }
 998 }
 999
1000 /*
1001  * Check if the passed ino is one of the used superblock quota inodes.
1002  *
1003  * Before the quota inodes were journaled, older superblock quota inodes
1004  * were just regular files in the filesystem and not reserved inodes.  This
1005  * checks if the passed ino is one of the s_*_quota_inum superblock fields,
1006  * which may not always be the same as the EXT4_*_QUOTA_INO fields.
1007  */
1008 static int quota_inum_is_super(struct ext2_super_block *sb, ext2_ino_t ino)
1009 {
1010         enum quota_type qtype;
1011
1012         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1013                 if (*quota_sb_inump(sb, qtype) == ino)
1014                         return 1;
1015
1016         return 0;
1017 }
1018
1019 /*
1020  * Check if the passed ino is one of the reserved quota inodes.
1021  * This checks if the inode number is one of the reserved EXT4_*_QUOTA_INO
1022  * inodes.  These inodes may or may not be in use by the quota feature.
1023  */
1024 static int quota_inum_is_reserved(ext2_filsys fs, ext2_ino_t ino)
1025 {
1026         enum quota_type qtype;
1027
1028         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1029                 if (quota_type2inum(qtype, fs->super) == ino)
1030                         return 1;
1031
1032         return 0;
1033 }
1034
1035 void e2fsck_pass1(e2fsck_t ctx)
1036 {
1037         int     i;
1038         __u64   max_sizes;
1039         ext2_filsys fs = ctx->fs;
1040         ext2_ino_t      ino = 0;
1041         struct ext2_inode *inode = NULL;
1042         ext2_inode_scan scan = NULL;
1043         char            *block_buf = NULL;
1044 #ifdef RESOURCE_TRACK
1045         struct resource_track   rtrack;
1046 #endif
1047         unsigned char   frag, fsize;
1048         struct          problem_context pctx;
1049         struct          scan_callback_struct scan_struct;
1050         struct ext2_super_block *sb = ctx->fs->super;
1051         const char      *old_op;
1052         unsigned int    save_type;
1053         int             imagic_fs, extent_fs, inlinedata_fs;
1054         int             low_dtime_check = 1;
1055         int             inode_size = EXT2_INODE_SIZE(fs->super);
1056         int             failed_csum = 0;
1057         ext2_ino_t      ino_threshold = 0;
1058         dgrp_t          ra_group = 0;
1059
1060         init_resource_track(&rtrack, ctx->fs->io);
1061         clear_problem_context(&pctx);
1062
1063         /* If we can do readahead, figure out how many groups to pull in. */
1064         if (!e2fsck_can_readahead(ctx->fs))
1065                 ctx->readahead_kb = 0;
1066         else if (ctx->readahead_kb == ~0ULL)
1067                 ctx->readahead_kb = e2fsck_guess_readahead(ctx->fs);
1068         pass1_readahead(ctx, &ra_group, &ino_threshold);
1069
1070         if (!(ctx->options & E2F_OPT_PREEN))
1071                 fix_problem(ctx, PR_1_PASS_HEADER, &pctx);
1072
1073         if (ext2fs_has_feature_dir_index(fs->super) &&
1074             !(ctx->options & E2F_OPT_NO)) {
1075                 if (ext2fs_u32_list_create(&ctx->dirs_to_hash, 50))
1076                         ctx->dirs_to_hash = 0;
1077         }
1078
1079 #ifdef MTRACE
1080         mtrace_print("Pass 1");
1081 #endif
1082
1083 #define EXT2_BPP(bits) (1ULL << ((bits) - 2))
1084
1085         for (i = EXT2_MIN_BLOCK_LOG_SIZE; i <= EXT2_MAX_BLOCK_LOG_SIZE; i++) {
1086                 max_sizes = EXT2_NDIR_BLOCKS + EXT2_BPP(i);
1087                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i);
1088                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i) * EXT2_BPP(i);
1089                 max_sizes = (max_sizes * (1UL << i));
1090                 ext2_max_sizes[i - EXT2_MIN_BLOCK_LOG_SIZE] = max_sizes;
1091         }
1092 #undef EXT2_BPP
1093
1094         imagic_fs = ext2fs_has_feature_imagic_inodes(sb);
1095         extent_fs = ext2fs_has_feature_extents(sb);
1096         inlinedata_fs = ext2fs_has_feature_inline_data(sb);
1097
1098         /*
1099          * Allocate bitmaps structures
1100          */
1101         pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("in-use inode map"),
1102                                                     EXT2FS_BMAP64_RBTREE,
1103                                                     "inode_used_map",
1104                                                     &ctx->inode_used_map);
1105         if (pctx.errcode) {
1106                 pctx.num = 1;
1107                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1108                 ctx->flags |= E2F_FLAG_ABORT;
1109                 return;
1110         }
1111         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1112                         _("directory inode map"),
1113                         EXT2FS_BMAP64_AUTODIR,
1114                         "inode_dir_map", &ctx->inode_dir_map);
1115         if (pctx.errcode) {
1116                 pctx.num = 2;
1117                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1118                 ctx->flags |= E2F_FLAG_ABORT;
1119                 return;
1120         }
1121         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1122                         _("regular file inode map"), EXT2FS_BMAP64_RBTREE,
1123                         "inode_reg_map", &ctx->inode_reg_map);
1124         if (pctx.errcode) {
1125                 pctx.num = 6;
1126                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1127                 ctx->flags |= E2F_FLAG_ABORT;
1128                 return;
1129         }
1130         pctx.errcode = e2fsck_allocate_subcluster_bitmap(fs,
1131                         _("in-use block map"), EXT2FS_BMAP64_RBTREE,
1132                         "block_found_map", &ctx->block_found_map);
1133         if (pctx.errcode) {
1134                 pctx.num = 1;
1135                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1136                 ctx->flags |= E2F_FLAG_ABORT;
1137                 return;
1138         }
1139         pctx.errcode = e2fsck_allocate_block_bitmap(fs,
1140                         _("metadata block map"), EXT2FS_BMAP64_RBTREE,
1141                         "block_metadata_map", &ctx->block_metadata_map);
1142         if (pctx.errcode) {
1143                 pctx.num = 1;
1144                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1145                 ctx->flags |= E2F_FLAG_ABORT;
1146                 return;
1147         }
1148         e2fsck_setup_tdb_icount(ctx, 0, &ctx->inode_link_info);
1149         if (!ctx->inode_link_info) {
1150                 e2fsck_set_bitmap_type(fs, EXT2FS_BMAP64_RBTREE,
1151                                        "inode_link_info", &save_type);
1152                 pctx.errcode = ext2fs_create_icount2(fs, 0, 0, 0,
1153                                                      &ctx->inode_link_info);
1154                 fs->default_bitmap_type = save_type;
1155         }
1156
1157         if (pctx.errcode) {
1158                 fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
1159                 ctx->flags |= E2F_FLAG_ABORT;
1160                 return;
1161         }
1162         inode = (struct ext2_inode *)
1163                 e2fsck_allocate_memory(ctx, inode_size, "scratch inode");
1164
1165         inodes_to_process = (struct process_inode_block *)
1166                 e2fsck_allocate_memory(ctx,
1167                                        (ctx->process_inode_size *
1168                                         sizeof(struct process_inode_block)),
1169                                        "array of inodes to process");
1170         process_inode_count = 0;
1171
1172         pctx.errcode = ext2fs_init_dblist(fs, 0);
1173         if (pctx.errcode) {
1174                 fix_problem(ctx, PR_1_ALLOCATE_DBCOUNT, &pctx);
1175                 ctx->flags |= E2F_FLAG_ABORT;
1176                 goto endit;
1177         }
1178
1179         /*
1180          * If the last orphan field is set, clear it, since the pass1
1181          * processing will automatically find and clear the orphans.
1182          * In the future, we may want to try using the last_orphan
1183          * linked list ourselves, but for now, we clear it so that the
1184          * ext3 mount code won't get confused.
1185          */
1186         if (!(ctx->options & E2F_OPT_READONLY)) {
1187                 if (fs->super->s_last_orphan) {
1188                         fs->super->s_last_orphan = 0;
1189                         ext2fs_mark_super_dirty(fs);
1190                 }
1191         }
1192
1193         mark_table_blocks(ctx);
1194         pctx.errcode = ext2fs_convert_subcluster_bitmap(fs,
1195                                                 &ctx->block_found_map);
1196         if (pctx.errcode) {
1197                 fix_problem(ctx, PR_1_CONVERT_SUBCLUSTER, &pctx);
1198                 ctx->flags |= E2F_FLAG_ABORT;
1199                 goto endit;
1200         }
1201         block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3,
1202                                                     "block interate buffer");
1203         if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
1204                 e2fsck_use_inode_shortcuts(ctx, 1);
1205         e2fsck_intercept_block_allocations(ctx);
1206         old_op = ehandler_operation(_("opening inode scan"));
1207         pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks,
1208                                               &scan);
1209         ehandler_operation(old_op);
1210         if (pctx.errcode) {
1211                 fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1212                 ctx->flags |= E2F_FLAG_ABORT;
1213                 goto endit;
1214         }
1215         ext2fs_inode_scan_flags(scan, EXT2_SF_SKIP_MISSING_ITABLE |
1216                                       EXT2_SF_WARN_GARBAGE_INODES, 0);
1217         ctx->stashed_inode = inode;
1218         scan_struct.ctx = ctx;
1219         scan_struct.block_buf = block_buf;
1220         ext2fs_set_inode_callback(scan, scan_callback, &scan_struct);
1221         if (ctx->progress && ((ctx->progress)(ctx, 1, 0,
1222                                               ctx->fs->group_desc_count)))
1223                 goto endit;
1224         if ((fs->super->s_wtime < fs->super->s_inodes_count) ||
1225             (fs->super->s_mtime < fs->super->s_inodes_count) ||
1226             (fs->super->s_mkfs_time &&
1227              fs->super->s_mkfs_time < fs->super->s_inodes_count))
1228                 low_dtime_check = 0;
1229
1230         if (ext2fs_has_feature_mmp(fs->super) &&
1231             fs->super->s_mmp_block > fs->super->s_first_data_block &&
1232             fs->super->s_mmp_block < ext2fs_blocks_count(fs->super))
1233                 ext2fs_mark_block_bitmap2(ctx->block_found_map,
1234                                           fs->super->s_mmp_block);
1235
1236         /* Set up ctx->lost_and_found if possible */
1237         (void) e2fsck_get_lost_and_found(ctx, 0);
1238
1239         while (1) {
1240                 if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
1241                         if (e2fsck_mmp_update(fs))
1242                                 fatal_error(ctx, 0);
1243                 }
1244                 old_op = ehandler_operation(_("getting next inode from scan"));
1245                 pctx.errcode = ext2fs_get_next_inode_full(scan, &ino,
1246                                                           inode, inode_size);
1247                 if (ino > ino_threshold)
1248                         pass1_readahead(ctx, &ra_group, &ino_threshold);
1249                 ehandler_operation(old_op);
1250                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1251                         goto endit;
1252                 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) {
1253                         /*
1254                          * If badblocks says badblocks is bad, offer to clear
1255                          * the list, update the in-core bb list, and restart
1256                          * the inode scan.
1257                          */
1258                         if (ino == EXT2_BAD_INO &&
1259                             fix_problem(ctx, PR_1_BADBLOCKS_IN_BADBLOCKS,
1260                                         &pctx)) {
1261                                 errcode_t err;
1262
1263                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1264                                 ext2fs_badblocks_list_free(ctx->fs->badblocks);
1265                                 ctx->fs->badblocks = NULL;
1266                                 err = ext2fs_read_bb_inode(ctx->fs,
1267                                                         &ctx->fs->badblocks);
1268                                 if (err) {
1269                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1270                                                     &pctx);
1271                                         ctx->flags |= E2F_FLAG_ABORT;
1272                                         goto endit;
1273                                 }
1274                                 err = ext2fs_inode_scan_goto_blockgroup(scan,
1275                                                                         0);
1276                                 if (err) {
1277                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1278                                                     &pctx);
1279                                         ctx->flags |= E2F_FLAG_ABORT;
1280                                         goto endit;
1281                                 }
1282                                 continue;
1283                         }
1284                         if (!ctx->inode_bb_map)
1285                                 alloc_bb_map(ctx);
1286                         ext2fs_mark_inode_bitmap2(ctx->inode_bb_map, ino);
1287                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1288                         continue;
1289                 }
1290                 if (pctx.errcode &&
1291                     pctx.errcode != EXT2_ET_INODE_CSUM_INVALID &&
1292                     pctx.errcode != EXT2_ET_INODE_IS_GARBAGE) {
1293                         fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1294                         ctx->flags |= E2F_FLAG_ABORT;
1295                         goto endit;
1296                 }
1297                 if (!ino)
1298                         break;
1299                 pctx.ino = ino;
1300                 pctx.inode = inode;
1301                 ctx->stashed_ino = ino;
1302
1303                 /* Clear trashed inode? */
1304                 if (pctx.errcode == EXT2_ET_INODE_IS_GARBAGE &&
1305                     inode->i_links_count > 0 &&
1306                     fix_problem(ctx, PR_1_INODE_IS_GARBAGE, &pctx)) {
1307                         pctx.errcode = 0;
1308                         e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1309                 }
1310                 failed_csum = pctx.errcode != 0;
1311
1312                 if (inode->i_links_count) {
1313                         pctx.errcode = ext2fs_icount_store(ctx->inode_link_info,
1314                                            ino, inode->i_links_count);
1315                         if (pctx.errcode) {
1316                                 pctx.num = inode->i_links_count;
1317                                 fix_problem(ctx, PR_1_ICOUNT_STORE, &pctx);
1318                                 ctx->flags |= E2F_FLAG_ABORT;
1319                                 goto endit;
1320                         }
1321                 }
1322
1323                 /* Conflicting inlinedata/extents inode flags? */
1324                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
1325                     (inode->i_flags & EXT4_EXTENTS_FL)) {
1326                         int res = fix_inline_data_extents_file(ctx, ino, inode,
1327                                                                inode_size,
1328                                                                &pctx);
1329                         if (res < 0) {
1330                                 /* skip FINISH_INODE_LOOP */
1331                                 continue;
1332                         }
1333                 }
1334
1335                 /* Test for incorrect inline_data flags settings. */
1336                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && !inlinedata_fs &&
1337                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1338                         size_t size = 0;
1339
1340                         pctx.errcode = ext2fs_inline_data_size(fs, ino, &size);
1341                         if (!pctx.errcode && size &&
1342                             fix_problem(ctx, PR_1_INLINE_DATA_FEATURE, &pctx)) {
1343                                 ext2fs_set_feature_inline_data(sb);
1344                                 ext2fs_mark_super_dirty(fs);
1345                                 inlinedata_fs = 1;
1346                         } else if (fix_problem(ctx, PR_1_INLINE_DATA_SET, &pctx)) {
1347                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1348                                 /* skip FINISH_INODE_LOOP */
1349                                 continue;
1350                         }
1351                 }
1352
1353                 /* Test for inline data flag but no attr */
1354                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && inlinedata_fs &&
1355                     EXT2_I_SIZE(inode) > EXT4_MIN_INLINE_DATA_SIZE &&
1356                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1357                         size_t size = 0;
1358                         errcode_t err;
1359                         int flags;
1360
1361                         flags = fs->flags;
1362                         if (failed_csum)
1363                                 fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1364                         err = get_inline_data_ea_size(fs, ino, &size);
1365                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1366                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1367
1368                         switch (err) {
1369                         case 0:
1370                                 /* Everything is awesome... */
1371                                 break;
1372                         case EXT2_ET_BAD_EA_BLOCK_NUM:
1373                         case EXT2_ET_BAD_EA_HASH:
1374                         case EXT2_ET_BAD_EA_HEADER:
1375                         case EXT2_ET_EA_BAD_NAME_LEN:
1376                         case EXT2_ET_EA_BAD_VALUE_SIZE:
1377                         case EXT2_ET_EA_KEY_NOT_FOUND:
1378                         case EXT2_ET_EA_NO_SPACE:
1379                         case EXT2_ET_MISSING_EA_FEATURE:
1380                         case EXT2_ET_INLINE_DATA_CANT_ITERATE:
1381                         case EXT2_ET_INLINE_DATA_NO_BLOCK:
1382                         case EXT2_ET_INLINE_DATA_NO_SPACE:
1383                         case EXT2_ET_NO_INLINE_DATA:
1384                         case EXT2_ET_EXT_ATTR_CSUM_INVALID:
1385                         case EXT2_ET_EA_BAD_VALUE_OFFSET:
1386                                 /* broken EA or no system.data EA; truncate */
1387                                 if (fix_problem(ctx, PR_1_INLINE_DATA_NO_ATTR,
1388                                                 &pctx)) {
1389                                         err = ext2fs_inode_size_set(fs, inode,
1390                                                         sizeof(inode->i_block));
1391                                         if (err) {
1392                                                 pctx.errcode = err;
1393                                                 ctx->flags |= E2F_FLAG_ABORT;
1394                                                 goto endit;
1395                                         }
1396                                         if (LINUX_S_ISLNK(inode->i_mode))
1397                                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1398                                         e2fsck_write_inode(ctx, ino, inode,
1399                                                            "pass1");
1400                                         failed_csum = 0;
1401                                 }
1402                                 break;
1403                         default:
1404                                 /* Some other kind of non-xattr error? */
1405                                 pctx.errcode = err;
1406                                 ctx->flags |= E2F_FLAG_ABORT;
1407                                 goto endit;
1408                         }
1409                 }
1410
1411                 /*
1412                  * Test for incorrect extent flag settings.
1413                  *
1414                  * On big-endian machines we must be careful:
1415                  * When the inode is read, the i_block array is not swapped
1416                  * if the extent flag is set.  Therefore if we are testing
1417                  * for or fixing a wrongly-set flag, we must potentially
1418                  * (un)swap before testing, or after fixing.
1419                  */
1420
1421                 /*
1422                  * In this case the extents flag was set when read, so
1423                  * extent_header_verify is ok.  If the inode is cleared,
1424                  * no need to swap... so no extra swapping here.
1425                  */
1426                 if ((inode->i_flags & EXT4_EXTENTS_FL) && !extent_fs &&
1427                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1428                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO))) {
1429                         if ((ext2fs_extent_header_verify(inode->i_block,
1430                                                  sizeof(inode->i_block)) == 0) &&
1431                             fix_problem(ctx, PR_1_EXTENT_FEATURE, &pctx)) {
1432                                 ext2fs_set_feature_extents(sb);
1433                                 ext2fs_mark_super_dirty(fs);
1434                                 extent_fs = 1;
1435                         } else if (fix_problem(ctx, PR_1_EXTENTS_SET, &pctx)) {
1436                         clear_inode:
1437                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1438                                 if (ino == EXT2_BAD_INO)
1439                                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map,
1440                                                                  ino);
1441                                 /* skip FINISH_INODE_LOOP */
1442                                 continue;
1443                         }
1444                 }
1445
1446                 /*
1447                  * For big-endian machines:
1448                  * If the inode didn't have the extents flag set when it
1449                  * was read, then the i_blocks array was swapped.  To test
1450                  * as an extents header, we must swap it back first.
1451                  * IF we then set the extents flag, the entire i_block
1452                  * array must be un/re-swapped to make it proper extents data.
1453                  */
1454                 if (extent_fs && !(inode->i_flags & EXT4_EXTENTS_FL) &&
1455                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1456                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO)) &&
1457                     (LINUX_S_ISREG(inode->i_mode) ||
1458                      LINUX_S_ISDIR(inode->i_mode))) {
1459                         void *ehp;
1460 #ifdef WORDS_BIGENDIAN
1461                         __u32 tmp_block[EXT2_N_BLOCKS];
1462
1463                         for (i = 0; i < EXT2_N_BLOCKS; i++)
1464                                 tmp_block[i] = ext2fs_swab32(inode->i_block[i]);
1465                         ehp = tmp_block;
1466 #else
1467                         ehp = inode->i_block;
1468 #endif
1469                         if ((ext2fs_extent_header_verify(ehp,
1470                                          sizeof(inode->i_block)) == 0) &&
1471                             (fix_problem(ctx, PR_1_UNSET_EXTENT_FL, &pctx))) {
1472                                 inode->i_flags |= EXT4_EXTENTS_FL;
1473 #ifdef WORDS_BIGENDIAN
1474                                 memcpy(inode->i_block, tmp_block,
1475                                        sizeof(inode->i_block));
1476 #endif
1477                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1478                                 failed_csum = 0;
1479                         }
1480                 }
1481
1482                 if (ino == EXT2_BAD_INO) {
1483                         struct process_block_struct pb;
1484
1485                         if ((failed_csum || inode->i_mode || inode->i_uid ||
1486                              inode->i_gid || inode->i_links_count ||
1487                              (inode->i_flags & EXT4_INLINE_DATA_FL) ||
1488                              inode->i_file_acl) &&
1489                             fix_problem(ctx, PR_1_INVALID_BAD_INODE, &pctx)) {
1490                                 memset(inode, 0, sizeof(struct ext2_inode));
1491                                 e2fsck_write_inode(ctx, ino, inode,
1492                                                    "clear bad inode");
1493                                 failed_csum = 0;
1494                         }
1495
1496                         pctx.errcode = ext2fs_copy_bitmap(ctx->block_found_map,
1497                                                           &pb.fs_meta_blocks);
1498                         if (pctx.errcode) {
1499                                 pctx.num = 4;
1500                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1501                                 ctx->flags |= E2F_FLAG_ABORT;
1502                                 goto endit;
1503                         }
1504                         pb.ino = EXT2_BAD_INO;
1505                         pb.num_blocks = pb.last_block = 0;
1506                         pb.last_db_block = -1;
1507                         pb.num_illegal_blocks = 0;
1508                         pb.suppress = 0; pb.clear = 0; pb.is_dir = 0;
1509                         pb.is_reg = 0; pb.fragmented = 0; pb.bbcheck = 0;
1510                         pb.inode = inode;
1511                         pb.pctx = &pctx;
1512                         pb.ctx = ctx;
1513                         pctx.errcode = ext2fs_block_iterate3(fs, ino, 0,
1514                                      block_buf, process_bad_block, &pb);
1515                         ext2fs_free_block_bitmap(pb.fs_meta_blocks);
1516                         if (pctx.errcode) {
1517                                 fix_problem(ctx, PR_1_BLOCK_ITERATE, &pctx);
1518                                 ctx->flags |= E2F_FLAG_ABORT;
1519                                 goto endit;
1520                         }
1521                         if (pb.bbcheck)
1522                                 if (!fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK_PROMPT, &pctx)) {
1523                                 ctx->flags |= E2F_FLAG_ABORT;
1524                                 goto endit;
1525                         }
1526                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1527                         clear_problem_context(&pctx);
1528                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1529                         continue;
1530                 } else if (ino == EXT2_ROOT_INO) {
1531                         /*
1532                          * Make sure the root inode is a directory; if
1533                          * not, offer to clear it.  It will be
1534                          * regnerated in pass #3.
1535                          */
1536                         if (!LINUX_S_ISDIR(inode->i_mode)) {
1537                                 if (fix_problem(ctx, PR_1_ROOT_NO_DIR, &pctx))
1538                                         goto clear_inode;
1539                         }
1540                         /*
1541                          * If dtime is set, offer to clear it.  mke2fs
1542                          * version 0.2b created filesystems with the
1543                          * dtime field set for the root and lost+found
1544                          * directories.  We won't worry about
1545                          * /lost+found, since that can be regenerated
1546                          * easily.  But we will fix the root directory
1547                          * as a special case.
1548                          */
1549                         if (inode->i_dtime && inode->i_links_count) {
1550                                 if (fix_problem(ctx, PR_1_ROOT_DTIME, &pctx)) {
1551                                         inode->i_dtime = 0;
1552                                         e2fsck_write_inode(ctx, ino, inode,
1553                                                            "pass1");
1554                                         failed_csum = 0;
1555                                 }
1556                         }
1557                 } else if (ino == EXT2_JOURNAL_INO) {
1558                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1559                         if (fs->super->s_journal_inum == EXT2_JOURNAL_INO) {
1560                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1561                                     fix_problem(ctx, PR_1_JOURNAL_BAD_MODE,
1562                                                 &pctx)) {
1563                                         inode->i_mode = LINUX_S_IFREG;
1564                                         e2fsck_write_inode(ctx, ino, inode,
1565                                                            "pass1");
1566                                         failed_csum = 0;
1567                                 }
1568                                 check_blocks(ctx, &pctx, block_buf);
1569                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1570                                 continue;
1571                         }
1572                         if ((inode->i_links_count ||
1573                              inode->i_blocks || inode->i_block[0]) &&
1574                             fix_problem(ctx, PR_1_JOURNAL_INODE_NOT_CLEAR,
1575                                         &pctx)) {
1576                                 memset(inode, 0, inode_size);
1577                                 ext2fs_icount_store(ctx->inode_link_info,
1578                                                     ino, 0);
1579                                 e2fsck_write_inode_full(ctx, ino, inode,
1580                                                         inode_size, "pass1");
1581                                 failed_csum = 0;
1582                         }
1583                 } else if (quota_inum_is_reserved(fs, ino)) {
1584                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1585                         if (ext2fs_has_feature_quota(fs->super) &&
1586                             quota_inum_is_super(fs->super, ino)) {
1587                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1588                                     fix_problem(ctx, PR_1_QUOTA_BAD_MODE,
1589                                                         &pctx)) {
1590                                         inode->i_mode = LINUX_S_IFREG;
1591                                         e2fsck_write_inode(ctx, ino, inode,
1592                                                         "pass1");
1593                                         failed_csum = 0;
1594                                 }
1595                                 check_blocks(ctx, &pctx, block_buf);
1596                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1597                                 continue;
1598                         }
1599                         if ((inode->i_links_count ||
1600                              inode->i_blocks || inode->i_block[0]) &&
1601                             fix_problem(ctx, PR_1_QUOTA_INODE_NOT_CLEAR,
1602                                         &pctx)) {
1603                                 memset(inode, 0, inode_size);
1604                                 ext2fs_icount_store(ctx->inode_link_info,
1605                                                     ino, 0);
1606                                 e2fsck_write_inode_full(ctx, ino, inode,
1607                                                         inode_size, "pass1");
1608                                 failed_csum = 0;
1609                         }
1610                 } else if (ino < EXT2_FIRST_INODE(fs->super)) {
1611                         problem_t problem = 0;
1612
1613                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1614                         if (ino == EXT2_BOOT_LOADER_INO) {
1615                                 if (LINUX_S_ISDIR(inode->i_mode))
1616                                         problem = PR_1_RESERVED_BAD_MODE;
1617                         } else if (ino == EXT2_RESIZE_INO) {
1618                                 if (inode->i_mode &&
1619                                     !LINUX_S_ISREG(inode->i_mode))
1620                                         problem = PR_1_RESERVED_BAD_MODE;
1621                         } else {
1622                                 if (inode->i_mode != 0)
1623                                         problem = PR_1_RESERVED_BAD_MODE;
1624                         }
1625                         if (problem) {
1626                                 if (fix_problem(ctx, problem, &pctx)) {
1627                                         inode->i_mode = 0;
1628                                         e2fsck_write_inode(ctx, ino, inode,
1629                                                            "pass1");
1630                                         failed_csum = 0;
1631                                 }
1632                         }
1633                         check_blocks(ctx, &pctx, block_buf);
1634                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1635                         continue;
1636                 }
1637
1638                 /*
1639                  * Check for inodes who might have been part of the
1640                  * orphaned list linked list.  They should have gotten
1641                  * dealt with by now, unless the list had somehow been
1642                  * corrupted.
1643                  *
1644                  * FIXME: In the future, inodes which are still in use
1645                  * (and which are therefore) pending truncation should
1646                  * be handled specially.  Right now we just clear the
1647                  * dtime field, and the normal e2fsck handling of
1648                  * inodes where i_size and the inode blocks are
1649                  * inconsistent is to fix i_size, instead of releasing
1650                  * the extra blocks.  This won't catch the inodes that
1651                  * was at the end of the orphan list, but it's better
1652                  * than nothing.  The right answer is that there
1653                  * shouldn't be any bugs in the orphan list handling.  :-)
1654                  */
1655                 if (inode->i_dtime && low_dtime_check &&
1656                     inode->i_dtime < ctx->fs->super->s_inodes_count) {
1657                         if (fix_problem(ctx, PR_1_LOW_DTIME, &pctx)) {
1658                                 inode->i_dtime = inode->i_links_count ?
1659                                         0 : ctx->now;
1660                                 e2fsck_write_inode(ctx, ino, inode,
1661                                                    "pass1");
1662                                 failed_csum = 0;
1663                         }
1664                 }
1665
1666                 /*
1667                  * This code assumes that deleted inodes have
1668                  * i_links_count set to 0.
1669                  */
1670                 if (!inode->i_links_count) {
1671                         if (!inode->i_dtime && inode->i_mode) {
1672                                 if (fix_problem(ctx,
1673                                             PR_1_ZERO_DTIME, &pctx)) {
1674                                         inode->i_dtime = ctx->now;
1675                                         e2fsck_write_inode(ctx, ino, inode,
1676                                                            "pass1");
1677                                         failed_csum = 0;
1678                                 }
1679                         }
1680                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1681                         continue;
1682                 }
1683                 /*
1684                  * n.b.  0.3c ext2fs code didn't clear i_links_count for
1685                  * deleted files.  Oops.
1686                  *
1687                  * Since all new ext2 implementations get this right,
1688                  * we now assume that the case of non-zero
1689                  * i_links_count and non-zero dtime means that we
1690                  * should keep the file, not delete it.
1691                  *
1692                  */
1693                 if (inode->i_dtime) {
1694                         if (fix_problem(ctx, PR_1_SET_DTIME, &pctx)) {
1695                                 inode->i_dtime = 0;
1696                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1697                                 failed_csum = 0;
1698                         }
1699                 }
1700
1701                 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1702                 switch (fs->super->s_creator_os) {
1703                     case EXT2_OS_HURD:
1704                         frag = inode->osd2.hurd2.h_i_frag;
1705                         fsize = inode->osd2.hurd2.h_i_fsize;
1706                         break;
1707                     default:
1708                         frag = fsize = 0;
1709                 }
1710
1711                 if (inode->i_faddr || frag || fsize ||
1712                     (LINUX_S_ISDIR(inode->i_mode) && inode->i_dir_acl))
1713                         mark_inode_bad(ctx, ino);
1714                 if ((fs->super->s_creator_os == EXT2_OS_LINUX) &&
1715                     !ext2fs_has_feature_64bit(fs->super) &&
1716                     inode->osd2.linux2.l_i_file_acl_high != 0)
1717                         mark_inode_bad(ctx, ino);
1718                 if ((fs->super->s_creator_os == EXT2_OS_LINUX) &&
1719                     !ext2fs_has_feature_huge_file(fs->super) &&
1720                     (inode->osd2.linux2.l_i_blocks_hi != 0))
1721                         mark_inode_bad(ctx, ino);
1722                 if (inode->i_flags & EXT2_IMAGIC_FL) {
1723                         if (imagic_fs) {
1724                                 if (!ctx->inode_imagic_map)
1725                                         alloc_imagic_map(ctx);
1726                                 ext2fs_mark_inode_bitmap2(ctx->inode_imagic_map,
1727                                                          ino);
1728                         } else {
1729                                 if (fix_problem(ctx, PR_1_SET_IMAGIC, &pctx)) {
1730                                         inode->i_flags &= ~EXT2_IMAGIC_FL;
1731                                         e2fsck_write_inode(ctx, ino,
1732                                                            inode, "pass1");
1733                                         failed_csum = 0;
1734                                 }
1735                         }
1736                 }
1737
1738                 check_inode_extra_space(ctx, &pctx);
1739                 check_is_really_dir(ctx, &pctx, block_buf);
1740
1741                 /*
1742                  * ext2fs_inode_has_valid_blocks2 does not actually look
1743                  * at i_block[] values, so not endian-sensitive here.
1744                  */
1745                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL) &&
1746                     LINUX_S_ISLNK(inode->i_mode) &&
1747                     !ext2fs_inode_has_valid_blocks2(fs, inode) &&
1748                     fix_problem(ctx, PR_1_FAST_SYMLINK_EXTENT_FL, &pctx)) {
1749                         inode->i_flags &= ~EXT4_EXTENTS_FL;
1750                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1751                         failed_csum = 0;
1752                 }
1753
1754                 if (LINUX_S_ISDIR(inode->i_mode)) {
1755                         ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
1756                         e2fsck_add_dir_info(ctx, ino, 0);
1757                         ctx->fs_directory_count++;
1758                         if (inode->i_flags & EXT4_ENCRYPT_FL)
1759                                 add_encrypted_dir(ctx, ino);
1760                 } else if (LINUX_S_ISREG (inode->i_mode)) {
1761                         ext2fs_mark_inode_bitmap2(ctx->inode_reg_map, ino);
1762                         ctx->fs_regular_count++;
1763                 } else if (LINUX_S_ISCHR (inode->i_mode) &&
1764                            e2fsck_pass1_check_device_inode(fs, inode)) {
1765                         check_extents_inlinedata(ctx, &pctx);
1766                         check_immutable(ctx, &pctx);
1767                         check_size(ctx, &pctx);
1768                         ctx->fs_chardev_count++;
1769                 } else if (LINUX_S_ISBLK (inode->i_mode) &&
1770                            e2fsck_pass1_check_device_inode(fs, inode)) {
1771                         check_extents_inlinedata(ctx, &pctx);
1772                         check_immutable(ctx, &pctx);
1773                         check_size(ctx, &pctx);
1774                         ctx->fs_blockdev_count++;
1775                 } else if (LINUX_S_ISLNK (inode->i_mode) &&
1776                            e2fsck_pass1_check_symlink(fs, ino, inode,
1777                                                       block_buf)) {
1778                         check_immutable(ctx, &pctx);
1779                         ctx->fs_symlinks_count++;
1780                         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
1781                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1782                                 continue;
1783                         } else if (ext2fs_inode_data_blocks(fs, inode) == 0) {
1784                                 ctx->fs_fast_symlinks_count++;
1785                                 check_blocks(ctx, &pctx, block_buf);
1786                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1787                                 continue;
1788                         }
1789                 }
1790                 else if (LINUX_S_ISFIFO (inode->i_mode) &&
1791                          e2fsck_pass1_check_device_inode(fs, inode)) {
1792                         check_extents_inlinedata(ctx, &pctx);
1793                         check_immutable(ctx, &pctx);
1794                         check_size(ctx, &pctx);
1795                         ctx->fs_fifo_count++;
1796                 } else if ((LINUX_S_ISSOCK (inode->i_mode)) &&
1797                            e2fsck_pass1_check_device_inode(fs, inode)) {
1798                         check_extents_inlinedata(ctx, &pctx);
1799                         check_immutable(ctx, &pctx);
1800                         check_size(ctx, &pctx);
1801                         ctx->fs_sockets_count++;
1802                 } else
1803                         mark_inode_bad(ctx, ino);
1804                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1805                     !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
1806                         if (inode->i_block[EXT2_IND_BLOCK])
1807                                 ctx->fs_ind_count++;
1808                         if (inode->i_block[EXT2_DIND_BLOCK])
1809                                 ctx->fs_dind_count++;
1810                         if (inode->i_block[EXT2_TIND_BLOCK])
1811                                 ctx->fs_tind_count++;
1812                 }
1813                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1814                     !(inode->i_flags & EXT4_INLINE_DATA_FL) &&
1815                     (inode->i_block[EXT2_IND_BLOCK] ||
1816                      inode->i_block[EXT2_DIND_BLOCK] ||
1817                      inode->i_block[EXT2_TIND_BLOCK] ||
1818                      ext2fs_file_acl_block(fs, inode))) {
1819                         inodes_to_process[process_inode_count].ino = ino;
1820                         inodes_to_process[process_inode_count].inode =
1821                                        *(struct ext2_inode_large *)inode;
1822                         process_inode_count++;
1823                 } else
1824                         check_blocks(ctx, &pctx, block_buf);
1825
1826                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1827
1828                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1829                         goto endit;
1830
1831                 if (process_inode_count >= ctx->process_inode_size) {
1832                         process_inodes(ctx, block_buf);
1833
1834                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1835                                 goto endit;
1836                 }
1837         }
1838         process_inodes(ctx, block_buf);
1839         ext2fs_close_inode_scan(scan);
1840         scan = NULL;
1841
1842         reserve_block_for_root_repair(ctx);
1843         reserve_block_for_lnf_repair(ctx);
1844
1845         /*
1846          * If any extended attribute blocks' reference counts need to
1847          * be adjusted, either up (ctx->refcount_extra), or down
1848          * (ctx->refcount), then fix them.
1849          */
1850         if (ctx->refcount) {
1851                 adjust_extattr_refcount(ctx, ctx->refcount, block_buf, -1);
1852                 ea_refcount_free(ctx->refcount);
1853                 ctx->refcount = 0;
1854         }
1855         if (ctx->refcount_extra) {
1856                 adjust_extattr_refcount(ctx, ctx->refcount_extra,
1857                                         block_buf, +1);
1858                 ea_refcount_free(ctx->refcount_extra);
1859                 ctx->refcount_extra = 0;
1860         }
1861
1862         if (ctx->invalid_bitmaps)
1863                 handle_fs_bad_blocks(ctx);
1864
1865         /* We don't need the block_ea_map any more */
1866         if (ctx->block_ea_map) {
1867                 ext2fs_free_block_bitmap(ctx->block_ea_map);
1868                 ctx->block_ea_map = 0;
1869         }
1870
1871         if (ctx->flags & E2F_FLAG_RESIZE_INODE) {
1872                 clear_problem_context(&pctx);
1873                 pctx.errcode = ext2fs_create_resize_inode(fs);
1874                 if (pctx.errcode) {
1875                         if (!fix_problem(ctx, PR_1_RESIZE_INODE_CREATE,
1876                                          &pctx)) {
1877                                 ctx->flags |= E2F_FLAG_ABORT;
1878                                 goto endit;
1879                         }
1880                         pctx.errcode = 0;
1881                 }
1882                 if (!pctx.errcode) {
1883                         e2fsck_read_inode(ctx, EXT2_RESIZE_INO, inode,
1884                                           "recreate inode");
1885                         inode->i_mtime = ctx->now;
1886                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, inode,
1887                                            "recreate inode");
1888                 }
1889                 ctx->flags &= ~E2F_FLAG_RESIZE_INODE;
1890         }
1891
1892         if (ctx->flags & E2F_FLAG_RESTART) {
1893                 /*
1894                  * Only the master copy of the superblock and block
1895                  * group descriptors are going to be written during a
1896                  * restart, so set the superblock to be used to be the
1897                  * master superblock.
1898                  */
1899                 ctx->use_superblock = 0;
1900                 unwind_pass1(fs);
1901                 goto endit;
1902         }
1903
1904         if (ctx->block_dup_map) {
1905                 if (ctx->options & E2F_OPT_PREEN) {
1906                         clear_problem_context(&pctx);
1907                         fix_problem(ctx, PR_1_DUP_BLOCKS_PREENSTOP, &pctx);
1908                 }
1909                 e2fsck_pass1_dupblocks(ctx, block_buf);
1910         }
1911         ctx->flags |= E2F_FLAG_ALLOC_OK;
1912         ext2fs_free_mem(&inodes_to_process);
1913 endit:
1914         e2fsck_use_inode_shortcuts(ctx, 0);
1915
1916         if (scan)
1917                 ext2fs_close_inode_scan(scan);
1918         if (block_buf)
1919                 ext2fs_free_mem(&block_buf);
1920         if (inode)
1921                 ext2fs_free_mem(&inode);
1922
1923         /*
1924          * The l+f inode may have been cleared, so zap it now and
1925          * later passes will recalculate it if necessary
1926          */
1927         ctx->lost_and_found = 0;
1928
1929         if ((ctx->flags & E2F_FLAG_SIGNAL_MASK) == 0)
1930                 print_resource_track(ctx, _("Pass 1"), &rtrack, ctx->fs->io);
1931         else
1932                 ctx->invalid_bitmaps++;
1933 }
1934 #undef FINISH_INODE_LOOP
1935
1936 /*
1937  * When the inode_scan routines call this callback at the end of the
1938  * glock group, call process_inodes.
1939  */
1940 static errcode_t scan_callback(ext2_filsys fs,
1941                                ext2_inode_scan scan EXT2FS_ATTR((unused)),
1942                                dgrp_t group, void * priv_data)
1943 {
1944         struct scan_callback_struct *scan_struct;
1945         e2fsck_t ctx;
1946
1947         scan_struct = (struct scan_callback_struct *) priv_data;
1948         ctx = scan_struct->ctx;
1949
1950         process_inodes((e2fsck_t) fs->priv_data, scan_struct->block_buf);
1951
1952         if (ctx->progress)
1953                 if ((ctx->progress)(ctx, 1, group+1,
1954                                     ctx->fs->group_desc_count))
1955                         return EXT2_ET_CANCEL_REQUESTED;
1956
1957         return 0;
1958 }
1959
1960 /*
1961  * Process the inodes in the "inodes to process" list.
1962  */
1963 static void process_inodes(e2fsck_t ctx, char *block_buf)
1964 {
1965         int                     i;
1966         struct ext2_inode       *old_stashed_inode;
1967         ext2_ino_t              old_stashed_ino;
1968         const char              *old_operation;
1969         char                    buf[80];
1970         struct problem_context  pctx;
1971
1972 #if 0
1973         printf("begin process_inodes: ");
1974 #endif
1975         if (process_inode_count == 0)
1976                 return;
1977         old_operation = ehandler_operation(0);
1978         old_stashed_inode = ctx->stashed_inode;
1979         old_stashed_ino = ctx->stashed_ino;
1980         qsort(inodes_to_process, process_inode_count,
1981                       sizeof(struct process_inode_block), process_inode_cmp);
1982         clear_problem_context(&pctx);
1983         for (i=0; i < process_inode_count; i++) {
1984                 pctx.inode = ctx->stashed_inode =
1985                         (struct ext2_inode *) &inodes_to_process[i].inode;
1986                 pctx.ino = ctx->stashed_ino = inodes_to_process[i].ino;
1987
1988 #if 0
1989                 printf("%u ", pctx.ino);
1990 #endif
1991                 sprintf(buf, _("reading indirect blocks of inode %u"),
1992                         pctx.ino);
1993                 ehandler_operation(buf);
1994                 check_blocks(ctx, &pctx, block_buf);
1995                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1996                         break;
1997         }
1998         ctx->stashed_inode = old_stashed_inode;
1999         ctx->stashed_ino = old_stashed_ino;
2000         process_inode_count = 0;
2001 #if 0
2002         printf("end process inodes\n");
2003 #endif
2004         ehandler_operation(old_operation);
2005 }
2006
2007 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b)
2008 {
2009         const struct process_inode_block *ib_a =
2010                 (const struct process_inode_block *) a;
2011         const struct process_inode_block *ib_b =
2012                 (const struct process_inode_block *) b;
2013         int     ret;
2014
2015         ret = (ib_a->inode.i_block[EXT2_IND_BLOCK] -
2016                ib_b->inode.i_block[EXT2_IND_BLOCK]);
2017         if (ret == 0)
2018                 /*
2019                  * We only call process_inodes() for non-extent
2020                  * inodes, so it's OK to pass NULL to
2021                  * ext2fs_file_acl_block() here.
2022                  */
2023                 ret = ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_a->inode)) -
2024                         ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_b->inode));
2025         if (ret == 0)
2026                 ret = ib_a->ino - ib_b->ino;
2027         return ret;
2028 }
2029
2030 /*
2031  * Mark an inode as being bad in some what
2032  */
2033 static void mark_inode_bad(e2fsck_t ctx, ino_t ino)
2034 {
2035         struct          problem_context pctx;
2036
2037         if (!ctx->inode_bad_map) {
2038                 clear_problem_context(&pctx);
2039
2040                 pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2041                                 _("bad inode map"), EXT2FS_BMAP64_RBTREE,
2042                                 "inode_bad_map", &ctx->inode_bad_map);
2043                 if (pctx.errcode) {
2044                         pctx.num = 3;
2045                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2046                         /* Should never get here */
2047                         ctx->flags |= E2F_FLAG_ABORT;
2048                         return;
2049                 }
2050         }
2051         ext2fs_mark_inode_bitmap2(ctx->inode_bad_map, ino);
2052 }
2053
2054 static void add_encrypted_dir(e2fsck_t ctx, ino_t ino)
2055 {
2056         struct          problem_context pctx;
2057
2058         if (!ctx->encrypted_dirs) {
2059                 pctx.errcode = ext2fs_u32_list_create(&ctx->encrypted_dirs, 0);
2060                 if (pctx.errcode)
2061                         goto error;
2062         }
2063         pctx.errcode = ext2fs_u32_list_add(ctx->encrypted_dirs, ino);
2064         if (pctx.errcode == 0)
2065                 return;
2066 error:
2067         fix_problem(ctx, PR_1_ALLOCATE_ENCRYPTED_DIRLIST, &pctx);
2068         /* Should never get here */
2069         ctx->flags |= E2F_FLAG_ABORT;
2070 }
2071
2072 /*
2073  * This procedure will allocate the inode "bb" (badblock) map table
2074  */
2075 static void alloc_bb_map(e2fsck_t ctx)
2076 {
2077         struct          problem_context pctx;
2078
2079         clear_problem_context(&pctx);
2080         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2081                         _("inode in bad block map"), EXT2FS_BMAP64_RBTREE,
2082                         "inode_bb_map", &ctx->inode_bb_map);
2083         if (pctx.errcode) {
2084                 pctx.num = 4;
2085                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2086                 /* Should never get here */
2087                 ctx->flags |= E2F_FLAG_ABORT;
2088                 return;
2089         }
2090 }
2091
2092 /*
2093  * This procedure will allocate the inode imagic table
2094  */
2095 static void alloc_imagic_map(e2fsck_t ctx)
2096 {
2097         struct          problem_context pctx;
2098
2099         clear_problem_context(&pctx);
2100         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2101                         _("imagic inode map"), EXT2FS_BMAP64_RBTREE,
2102                         "inode_imagic_map", &ctx->inode_imagic_map);
2103         if (pctx.errcode) {
2104                 pctx.num = 5;
2105                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2106                 /* Should never get here */
2107                 ctx->flags |= E2F_FLAG_ABORT;
2108                 return;
2109         }
2110 }
2111
2112 /*
2113  * Marks a block as in use, setting the dup_map if it's been set
2114  * already.  Called by process_block and process_bad_block.
2115  *
2116  * WARNING: Assumes checks have already been done to make sure block
2117  * is valid.  This is true in both process_block and process_bad_block.
2118  */
2119 static _INLINE_ void mark_block_used(e2fsck_t ctx, blk64_t block)
2120 {
2121         struct          problem_context pctx;
2122
2123         clear_problem_context(&pctx);
2124
2125         if (ext2fs_fast_test_block_bitmap2(ctx->block_found_map, block)) {
2126                 if (!ctx->block_dup_map) {
2127                         pctx.errcode = e2fsck_allocate_block_bitmap(ctx->fs,
2128                                         _("multiply claimed block map"),
2129                                         EXT2FS_BMAP64_RBTREE, "block_dup_map",
2130                                         &ctx->block_dup_map);
2131                         if (pctx.errcode) {
2132                                 pctx.num = 3;
2133                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR,
2134                                             &pctx);
2135                                 /* Should never get here */
2136                                 ctx->flags |= E2F_FLAG_ABORT;
2137                                 return;
2138                         }
2139                 }
2140                 ext2fs_fast_mark_block_bitmap2(ctx->block_dup_map, block);
2141         } else {
2142                 ext2fs_fast_mark_block_bitmap2(ctx->block_found_map, block);
2143         }
2144 }
2145
2146 static _INLINE_ void mark_blocks_used(e2fsck_t ctx, blk64_t block,
2147                                       unsigned int num)
2148 {
2149         if (ext2fs_test_block_bitmap_range2(ctx->block_found_map, block, num))
2150                 ext2fs_mark_block_bitmap_range2(ctx->block_found_map, block, num);
2151         else
2152                 while (num--)
2153                         mark_block_used(ctx, block++);
2154 }
2155
2156 /*
2157  * Adjust the extended attribute block's reference counts at the end
2158  * of pass 1, either by subtracting out references for EA blocks that
2159  * are still referenced in ctx->refcount, or by adding references for
2160  * EA blocks that had extra references as accounted for in
2161  * ctx->refcount_extra.
2162  */
2163 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
2164                                     char *block_buf, int adjust_sign)
2165 {
2166         struct ext2_ext_attr_header     *header;
2167         struct problem_context          pctx;
2168         ext2_filsys                     fs = ctx->fs;
2169         blk64_t                         blk;
2170         __u32                           should_be;
2171         int                             count;
2172
2173         clear_problem_context(&pctx);
2174
2175         ea_refcount_intr_begin(refcount);
2176         while (1) {
2177                 if ((blk = ea_refcount_intr_next(refcount, &count)) == 0)
2178                         break;
2179                 pctx.blk = blk;
2180                 pctx.errcode = ext2fs_read_ext_attr3(fs, blk, block_buf,
2181                                                      pctx.ino);
2182                 if (pctx.errcode) {
2183                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
2184                         return;
2185                 }
2186                 header = (struct ext2_ext_attr_header *) block_buf;
2187                 pctx.blkcount = header->h_refcount;
2188                 should_be = header->h_refcount + adjust_sign * count;
2189                 pctx.num = should_be;
2190                 if (fix_problem(ctx, PR_1_EXTATTR_REFCOUNT, &pctx)) {
2191                         header->h_refcount = should_be;
2192                         pctx.errcode = ext2fs_write_ext_attr3(fs, blk,
2193                                                              block_buf,
2194                                                              pctx.ino);
2195                         if (pctx.errcode) {
2196                                 fix_problem(ctx, PR_1_EXTATTR_WRITE_ABORT,
2197                                             &pctx);
2198                                 continue;
2199                         }
2200                 }
2201         }
2202 }
2203
2204 /*
2205  * Handle processing the extended attribute blocks
2206  */
2207 static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx,
2208                            char *block_buf)
2209 {
2210         ext2_filsys fs = ctx->fs;
2211         ext2_ino_t      ino = pctx->ino;
2212         struct ext2_inode *inode = pctx->inode;
2213         blk64_t         blk;
2214         char *          end;
2215         struct ext2_ext_attr_header *header;
2216         struct ext2_ext_attr_entry *entry;
2217         int             count;
2218         region_t        region = 0;
2219         int             failed_csum = 0;
2220
2221         blk = ext2fs_file_acl_block(fs, inode);
2222         if (blk == 0)
2223                 return 0;
2224
2225         /*
2226          * If the Extended attribute flag isn't set, then a non-zero
2227          * file acl means that the inode is corrupted.
2228          *
2229          * Or if the extended attribute block is an invalid block,
2230          * then the inode is also corrupted.
2231          */
2232         if (!ext2fs_has_feature_xattr(fs->super) ||
2233             (blk < fs->super->s_first_data_block) ||
2234             (blk >= ext2fs_blocks_count(fs->super))) {
2235                 mark_inode_bad(ctx, ino);
2236                 return 0;
2237         }
2238
2239         /* If ea bitmap hasn't been allocated, create it */
2240         if (!ctx->block_ea_map) {
2241                 pctx->errcode = e2fsck_allocate_block_bitmap(fs,
2242                                         _("ext attr block map"),
2243                                         EXT2FS_BMAP64_RBTREE, "block_ea_map",
2244                                         &ctx->block_ea_map);
2245                 if (pctx->errcode) {
2246                         pctx->num = 2;
2247                         fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, pctx);
2248                         ctx->flags |= E2F_FLAG_ABORT;
2249                         return 0;
2250                 }
2251         }
2252
2253         /* Create the EA refcount structure if necessary */
2254         if (!ctx->refcount) {
2255                 pctx->errcode = ea_refcount_create(0, &ctx->refcount);
2256                 if (pctx->errcode) {
2257                         pctx->num = 1;
2258                         fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2259                         ctx->flags |= E2F_FLAG_ABORT;
2260                         return 0;
2261                 }
2262         }
2263
2264 #if 0
2265         /* Debugging text */
2266         printf("Inode %u has EA block %u\n", ino, blk);
2267 #endif
2268
2269         /* Have we seen this EA block before? */
2270         if (ext2fs_fast_test_block_bitmap2(ctx->block_ea_map, blk)) {
2271                 if (ea_refcount_decrement(ctx->refcount, blk, 0) == 0)
2272                         return 1;
2273                 /* Ooops, this EA was referenced more than it stated */
2274                 if (!ctx->refcount_extra) {
2275                         pctx->errcode = ea_refcount_create(0,
2276                                            &ctx->refcount_extra);
2277                         if (pctx->errcode) {
2278                                 pctx->num = 2;
2279                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2280                                 ctx->flags |= E2F_FLAG_ABORT;
2281                                 return 0;
2282                         }
2283                 }
2284                 ea_refcount_increment(ctx->refcount_extra, blk, 0);
2285                 return 1;
2286         }
2287
2288         /*
2289          * OK, we haven't seen this EA block yet.  So we need to
2290          * validate it
2291          */
2292         pctx->blk = blk;
2293         pctx->errcode = ext2fs_read_ext_attr3(fs, blk, block_buf, pctx->ino);
2294         if (pctx->errcode == EXT2_ET_EXT_ATTR_CSUM_INVALID) {
2295                 pctx->errcode = 0;
2296                 failed_csum = 1;
2297         } else if (pctx->errcode == EXT2_ET_BAD_EA_HEADER)
2298                 pctx->errcode = 0;
2299
2300         if (pctx->errcode &&
2301             fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx)) {
2302                 pctx->errcode = 0;
2303                 goto clear_extattr;
2304         }
2305         header = (struct ext2_ext_attr_header *) block_buf;
2306         pctx->blk = ext2fs_file_acl_block(fs, inode);
2307         if (((ctx->ext_attr_ver == 1) &&
2308              (header->h_magic != EXT2_EXT_ATTR_MAGIC_v1)) ||
2309             ((ctx->ext_attr_ver == 2) &&
2310              (header->h_magic != EXT2_EXT_ATTR_MAGIC))) {
2311                 if (fix_problem(ctx, PR_1_BAD_EA_BLOCK, pctx))
2312                         goto clear_extattr;
2313         }
2314
2315         if (header->h_blocks != 1) {
2316                 if (fix_problem(ctx, PR_1_EA_MULTI_BLOCK, pctx))
2317                         goto clear_extattr;
2318         }
2319
2320         if (pctx->errcode && fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx))
2321                 goto clear_extattr;
2322
2323         region = region_create(0, fs->blocksize);
2324         if (!region) {
2325                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
2326                 ctx->flags |= E2F_FLAG_ABORT;
2327                 return 0;
2328         }
2329         if (region_allocate(region, 0, sizeof(struct ext2_ext_attr_header))) {
2330                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2331                         goto clear_extattr;
2332         }
2333
2334         entry = (struct ext2_ext_attr_entry *)(header+1);
2335         end = block_buf + fs->blocksize;
2336         while ((char *)entry < end && *(__u32 *)entry) {
2337                 __u32 hash;
2338
2339                 if (region_allocate(region, (char *)entry - (char *)header,
2340                                    EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
2341                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2342                                 goto clear_extattr;
2343                         break;
2344                 }
2345                 if ((ctx->ext_attr_ver == 1 &&
2346                      (entry->e_name_len == 0 || entry->e_name_index != 0)) ||
2347                     (ctx->ext_attr_ver == 2 &&
2348                      entry->e_name_index == 0)) {
2349                         if (fix_problem(ctx, PR_1_EA_BAD_NAME, pctx))
2350                                 goto clear_extattr;
2351                         break;
2352                 }
2353                 if (entry->e_value_block != 0) {
2354                         if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2355                                 goto clear_extattr;
2356                 }
2357                 if (entry->e_value_offs + entry->e_value_size > fs->blocksize) {
2358                         if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2359                                 goto clear_extattr;
2360                         break;
2361                 }
2362                 if (entry->e_value_size &&
2363                     region_allocate(region, entry->e_value_offs,
2364                                     EXT2_EXT_ATTR_SIZE(entry->e_value_size))) {
2365                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2366                                 goto clear_extattr;
2367                 }
2368
2369                 hash = ext2fs_ext_attr_hash_entry(entry, block_buf +
2370                                                          entry->e_value_offs);
2371
2372                 if (entry->e_hash != hash) {
2373                         pctx->num = entry->e_hash;
2374                         if (fix_problem(ctx, PR_1_ATTR_HASH, pctx))
2375                                 goto clear_extattr;
2376                         entry->e_hash = hash;
2377                 }
2378
2379                 entry = EXT2_EXT_ATTR_NEXT(entry);
2380         }
2381         if (region_allocate(region, (char *)entry - (char *)header, 4)) {
2382                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2383                         goto clear_extattr;
2384         }
2385         region_free(region);
2386
2387         /*
2388          * We only get here if there was no other errors that were fixed.
2389          * If there was a checksum fail, ask to correct it.
2390          */
2391         if (failed_csum &&
2392             fix_problem(ctx, PR_1_EA_BLOCK_ONLY_CSUM_INVALID, pctx)) {
2393                 pctx->errcode = ext2fs_write_ext_attr3(fs, blk, block_buf,
2394                                                        pctx->ino);
2395                 if (pctx->errcode)
2396                         return 0;
2397         }
2398
2399         count = header->h_refcount - 1;
2400         if (count)
2401                 ea_refcount_store(ctx->refcount, blk, count);
2402         mark_block_used(ctx, blk);
2403         ext2fs_fast_mark_block_bitmap2(ctx->block_ea_map, blk);
2404         return 1;
2405
2406 clear_extattr:
2407         if (region)
2408                 region_free(region);
2409         ext2fs_file_acl_block_set(fs, inode, 0);
2410         e2fsck_write_inode(ctx, ino, inode, "check_ext_attr");
2411         return 0;
2412 }
2413
2414 /* Returns 1 if bad htree, 0 if OK */
2415 static int handle_htree(e2fsck_t ctx, struct problem_context *pctx,
2416                         ext2_ino_t ino, struct ext2_inode *inode,
2417                         char *block_buf)
2418 {
2419         struct ext2_dx_root_info        *root;
2420         ext2_filsys                     fs = ctx->fs;
2421         errcode_t                       retval;
2422         blk64_t                         blk;
2423
2424         if ((!LINUX_S_ISDIR(inode->i_mode) &&
2425              fix_problem(ctx, PR_1_HTREE_NODIR, pctx)) ||
2426             (!ext2fs_has_feature_dir_index(fs->super) &&
2427              fix_problem(ctx, PR_1_HTREE_SET, pctx)))
2428                 return 1;
2429
2430         pctx->errcode = ext2fs_bmap2(fs, ino, inode, 0, 0, 0, 0, &blk);
2431
2432         if ((pctx->errcode) ||
2433             (blk == 0) ||
2434             (blk < fs->super->s_first_data_block) ||
2435             (blk >= ext2fs_blocks_count(fs->super))) {
2436                 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2437                         return 1;
2438                 else
2439                         return 0;
2440         }
2441
2442         retval = io_channel_read_blk64(fs->io, blk, 1, block_buf);
2443         if (retval && fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2444                 return 1;
2445
2446         /* XXX should check that beginning matches a directory */
2447         root = (struct ext2_dx_root_info *) (block_buf + 24);
2448
2449         if ((root->reserved_zero || root->info_length < 8) &&
2450             fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2451                 return 1;
2452
2453         pctx->num = root->hash_version;
2454         if ((root->hash_version != EXT2_HASH_LEGACY) &&
2455             (root->hash_version != EXT2_HASH_HALF_MD4) &&
2456             (root->hash_version != EXT2_HASH_TEA) &&
2457             fix_problem(ctx, PR_1_HTREE_HASHV, pctx))
2458                 return 1;
2459
2460         if ((root->unused_flags & EXT2_HASH_FLAG_INCOMPAT) &&
2461             fix_problem(ctx, PR_1_HTREE_INCOMPAT, pctx))
2462                 return 1;
2463
2464         pctx->num = root->indirect_levels;
2465         if ((root->indirect_levels > 1) &&
2466             fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2467                 return 1;
2468
2469         return 0;
2470 }
2471
2472 void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino,
2473                         struct ext2_inode *inode, int restart_flag,
2474                         const char *source)
2475 {
2476         inode->i_flags = 0;
2477         inode->i_links_count = 0;
2478         ext2fs_icount_store(ctx->inode_link_info, ino, 0);
2479         inode->i_dtime = ctx->now;
2480
2481         /*
2482          * If a special inode has such rotten block mappings that we
2483          * want to clear the whole inode, be sure to actually zap
2484          * the block maps because i_links_count isn't checked for
2485          * special inodes, and we'll end up right back here the next
2486          * time we run fsck.
2487          */
2488         if (ino < EXT2_FIRST_INODE(ctx->fs->super))
2489                 memset(inode->i_block, 0, sizeof(inode->i_block));
2490
2491         ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
2492         ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
2493         if (ctx->inode_reg_map)
2494                 ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
2495         if (ctx->inode_bad_map)
2496                 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
2497
2498         /*
2499          * If the inode was partially accounted for before processing
2500          * was aborted, we need to restart the pass 1 scan.
2501          */
2502         ctx->flags |= restart_flag;
2503
2504         if (ino == EXT2_BAD_INO)
2505                 memset(inode, 0, sizeof(struct ext2_inode));
2506
2507         e2fsck_write_inode(ctx, ino, inode, source);
2508 }
2509
2510 /*
2511  * Use the multiple-blocks reclamation code to fix alignment problems in
2512  * a bigalloc filesystem.  We want a logical cluster to map to *only* one
2513  * physical cluster, and we want the block offsets within that cluster to
2514  * line up.
2515  */
2516 static int has_unaligned_cluster_map(e2fsck_t ctx,
2517                                      blk64_t last_pblk, blk64_t last_lblk,
2518                                      blk64_t pblk, blk64_t lblk)
2519 {
2520         blk64_t cluster_mask;
2521
2522         if (!ctx->fs->cluster_ratio_bits)
2523                 return 0;
2524         cluster_mask = EXT2FS_CLUSTER_MASK(ctx->fs);
2525
2526         /*
2527          * If the block in the logical cluster doesn't align with the block in
2528          * the physical cluster...
2529          */
2530         if ((lblk & cluster_mask) != (pblk & cluster_mask))
2531                 return 1;
2532
2533         /*
2534          * If we cross a physical cluster boundary within a logical cluster...
2535          */
2536         if (last_pblk && (lblk & cluster_mask) != 0 &&
2537             EXT2FS_B2C(ctx->fs, lblk) == EXT2FS_B2C(ctx->fs, last_lblk) &&
2538             EXT2FS_B2C(ctx->fs, pblk) != EXT2FS_B2C(ctx->fs, last_pblk))
2539                 return 1;
2540
2541         return 0;
2542 }
2543
2544 static void scan_extent_node(e2fsck_t ctx, struct problem_context *pctx,
2545                              struct process_block_struct *pb,
2546                              blk64_t start_block, blk64_t end_block,
2547                              blk64_t eof_block,
2548                              ext2_extent_handle_t ehandle,
2549                              int try_repairs)
2550 {
2551         struct ext2fs_extent    extent;
2552         blk64_t                 blk, last_lblk;
2553         e2_blkcnt_t             blockcnt;
2554         unsigned int            i;
2555         int                     is_dir, is_leaf;
2556         problem_t               problem;
2557         struct ext2_extent_info info;
2558         int                     failed_csum = 0;
2559
2560         if (pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID)
2561                 failed_csum = 1;
2562
2563         pctx->errcode = ext2fs_extent_get_info(ehandle, &info);
2564         if (pctx->errcode)
2565                 return;
2566         if (!(ctx->options & E2F_OPT_FIXES_ONLY) &&
2567             !pb->eti.force_rebuild) {
2568                 struct extent_tree_level *etl;
2569
2570                 etl = pb->eti.ext_info + info.curr_level;
2571                 etl->num_extents += info.num_entries;
2572                 etl->max_extents += info.max_entries;
2573                 /*
2574                  * Implementation wart: Splitting extent blocks when appending
2575                  * will leave the old block with one free entry.  Therefore
2576                  * unless the node is totally full, pretend that a non-root
2577                  * extent block can hold one fewer entry than it actually does,
2578                  * so that we don't repeatedly rebuild the extent tree.
2579                  */
2580                 if (info.curr_level && info.num_entries < info.max_entries)
2581                         etl->max_extents--;
2582         }
2583
2584         pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_FIRST_SIB,
2585                                           &extent);
2586         while ((pctx->errcode == 0 ||
2587                 pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID) &&
2588                info.num_entries-- > 0) {
2589                 is_leaf = extent.e_flags & EXT2_EXTENT_FLAGS_LEAF;
2590                 is_dir = LINUX_S_ISDIR(pctx->inode->i_mode);
2591                 last_lblk = extent.e_lblk + extent.e_len - 1;
2592
2593                 problem = 0;
2594                 pctx->blk = extent.e_pblk;
2595                 pctx->blk2 = extent.e_lblk;
2596                 pctx->num = extent.e_len;
2597                 pctx->blkcount = extent.e_lblk + extent.e_len;
2598
2599                 if (extent.e_pblk == 0 ||
2600                     extent.e_pblk < ctx->fs->super->s_first_data_block ||
2601                     extent.e_pblk >= ext2fs_blocks_count(ctx->fs->super))
2602                         problem = PR_1_EXTENT_BAD_START_BLK;
2603                 else if (extent.e_lblk < start_block)
2604                         problem = PR_1_OUT_OF_ORDER_EXTENTS;
2605                 else if ((end_block && last_lblk > end_block) &&
2606                          (!(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT &&
2607                                 last_lblk > eof_block)))
2608                         problem = PR_1_EXTENT_END_OUT_OF_BOUNDS;
2609                 else if (is_leaf && extent.e_len == 0)
2610                         problem = PR_1_EXTENT_LENGTH_ZERO;
2611                 else if (is_leaf &&
2612                          (extent.e_pblk + extent.e_len) >
2613                          ext2fs_blocks_count(ctx->fs->super))
2614                         problem = PR_1_EXTENT_ENDS_BEYOND;
2615                 else if (is_leaf && is_dir &&
2616                          ((extent.e_lblk + extent.e_len) >
2617                           (1U << (21 - ctx->fs->super->s_log_block_size))))
2618                         problem = PR_1_TOOBIG_DIR;
2619
2620                 if (is_leaf && problem == 0 && extent.e_len > 0 &&
2621                     region_allocate(pb->region, extent.e_lblk, extent.e_len))
2622                         problem = PR_1_EXTENT_COLLISION;
2623
2624                 /*
2625                  * Uninitialized blocks in a directory?  Clear the flag and
2626                  * we'll interpret the blocks later.
2627                  */
2628                 if (try_repairs && is_dir && problem == 0 &&
2629                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
2630                     fix_problem(ctx, PR_1_UNINIT_DBLOCK, pctx)) {
2631                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
2632                         pb->inode_modified = 1;
2633                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
2634                                                               &extent);
2635                         if (pctx->errcode)
2636                                 return;
2637                         failed_csum = 0;
2638                 }
2639
2640                 if (try_repairs && problem) {
2641 report_problem:
2642                         if (fix_problem(ctx, problem, pctx)) {
2643                                 if (ctx->invalid_bitmaps) {
2644                                         /*
2645                                          * If fsck knows the bitmaps are bad,
2646                                          * skip to the next extent and
2647                                          * try to clear this extent again
2648                                          * after fixing the bitmaps, by
2649                                          * restarting fsck.
2650                                          */
2651                                         pctx->errcode = ext2fs_extent_get(
2652                                                           ehandle,
2653                                                           EXT2_EXTENT_NEXT_SIB,
2654                                                           &extent);
2655                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
2656                                         if (pctx->errcode ==
2657                                                     EXT2_ET_NO_CURRENT_NODE) {
2658                                                 pctx->errcode = 0;
2659                                                 break;
2660                                         }
2661                                         continue;
2662                                 }
2663                                 e2fsck_read_bitmaps(ctx);
2664                                 pb->inode_modified = 1;
2665                                 pctx->errcode =
2666                                         ext2fs_extent_delete(ehandle, 0);
2667                                 if (pctx->errcode) {
2668                                         pctx->str = "ext2fs_extent_delete";
2669                                         return;
2670                                 }
2671                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
2672                                 if (pctx->errcode &&
2673                                     pctx->errcode != EXT2_ET_NO_CURRENT_NODE) {
2674                                         pctx->str = "ext2fs_extent_fix_parents";
2675                                         return;
2676                                 }
2677                                 pctx->errcode = ext2fs_extent_get(ehandle,
2678                                                                   EXT2_EXTENT_CURRENT,
2679                                                                   &extent);
2680                                 if (pctx->errcode == EXT2_ET_NO_CURRENT_NODE) {
2681                                         pctx->errcode = 0;
2682                                         break;
2683                                 }
2684                                 failed_csum = 0;
2685                                 continue;
2686                         }
2687                         goto next;
2688                 }
2689
2690                 if (!is_leaf) {
2691                         blk64_t lblk = extent.e_lblk;
2692                         int next_try_repairs = 1;
2693
2694                         blk = extent.e_pblk;
2695
2696                         /*
2697                          * If this lower extent block collides with critical
2698                          * metadata, don't try to repair the damage.  Pass 1b
2699                          * will reallocate the block; then we can try again.
2700                          */
2701                         if (pb->ino != EXT2_RESIZE_INO &&
2702                             ext2fs_test_block_bitmap2(ctx->block_metadata_map,
2703                                                       extent.e_pblk)) {
2704                                 next_try_repairs = 0;
2705                                 pctx->blk = blk;
2706                                 fix_problem(ctx,
2707                                             PR_1_CRITICAL_METADATA_COLLISION,
2708                                             pctx);
2709                                 ctx->flags |= E2F_FLAG_RESTART_LATER;
2710                         }
2711                         pctx->errcode = ext2fs_extent_get(ehandle,
2712                                                   EXT2_EXTENT_DOWN, &extent);
2713                         if (pctx->errcode &&
2714                             pctx->errcode != EXT2_ET_EXTENT_CSUM_INVALID) {
2715                                 pctx->str = "EXT2_EXTENT_DOWN";
2716                                 problem = PR_1_EXTENT_HEADER_INVALID;
2717                                 if (!next_try_repairs)
2718                                         return;
2719                                 if (pctx->errcode == EXT2_ET_EXTENT_HEADER_BAD)
2720                                         goto report_problem;
2721                                 return;
2722                         }
2723                         /* The next extent should match this index's logical start */
2724                         if (extent.e_lblk != lblk) {
2725                                 struct ext2_extent_info e_info;
2726
2727                                 ext2fs_extent_get_info(ehandle, &e_info);
2728                                 pctx->blk = lblk;
2729                                 pctx->blk2 = extent.e_lblk;
2730                                 pctx->num = e_info.curr_level - 1;
2731                                 problem = PR_1_EXTENT_INDEX_START_INVALID;
2732                                 if (fix_problem(ctx, problem, pctx)) {
2733                                         pb->inode_modified = 1;
2734                                         pctx->errcode =
2735                                                 ext2fs_extent_fix_parents(ehandle);
2736                                         if (pctx->errcode) {
2737                                                 pctx->str = "ext2fs_extent_fix_parents";
2738                                                 return;
2739                                         }
2740                                 }
2741                         }
2742                         scan_extent_node(ctx, pctx, pb, extent.e_lblk,
2743                                          last_lblk, eof_block, ehandle,
2744                                          next_try_repairs);
2745                         if (pctx->errcode)
2746                                 return;
2747                         pctx->errcode = ext2fs_extent_get(ehandle,
2748                                                   EXT2_EXTENT_UP, &extent);
2749                         if (pctx->errcode) {
2750                                 pctx->str = "EXT2_EXTENT_UP";
2751                                 return;
2752                         }
2753                         mark_block_used(ctx, blk);
2754                         pb->num_blocks++;
2755                         goto next;
2756                 }
2757
2758                 if ((pb->previous_block != 0) &&
2759                     (pb->previous_block+1 != extent.e_pblk)) {
2760                         if (ctx->options & E2F_OPT_FRAGCHECK) {
2761                                 char type = '?';
2762
2763                                 if (pb->is_dir)
2764                                         type = 'd';
2765                                 else if (pb->is_reg)
2766                                         type = 'f';
2767
2768                                 printf(("%6lu(%c): expecting %6lu "
2769                                         "actual extent "
2770                                         "phys %6lu log %lu len %lu\n"),
2771                                        (unsigned long) pctx->ino, type,
2772                                        (unsigned long) pb->previous_block+1,
2773                                        (unsigned long) extent.e_pblk,
2774                                        (unsigned long) extent.e_lblk,
2775                                        (unsigned long) extent.e_len);
2776                         }
2777                         pb->fragmented = 1;
2778                 }
2779                 /*
2780                  * If we notice a gap in the logical block mappings of an
2781                  * extent-mapped directory, offer to close the hole by
2782                  * moving the logical block down, otherwise we'll go mad in
2783                  * pass 3 allocating empty directory blocks to fill the hole.
2784                  */
2785                 if (try_repairs && is_dir &&
2786                     pb->last_block + 1 < extent.e_lblk) {
2787                         blk64_t new_lblk;
2788
2789                         new_lblk = pb->last_block + 1;
2790                         if (EXT2FS_CLUSTER_RATIO(ctx->fs) > 1)
2791                                 new_lblk = ((new_lblk +
2792                                              EXT2FS_CLUSTER_RATIO(ctx->fs) - 1) &
2793                                             ~EXT2FS_CLUSTER_MASK(ctx->fs)) |
2794                                            (extent.e_pblk &
2795                                             EXT2FS_CLUSTER_MASK(ctx->fs));
2796                         pctx->blk = extent.e_lblk;
2797                         pctx->blk2 = new_lblk;
2798                         if (fix_problem(ctx, PR_1_COLLAPSE_DBLOCK, pctx)) {
2799                                 extent.e_lblk = new_lblk;
2800                                 pb->inode_modified = 1;
2801                                 pctx->errcode = ext2fs_extent_replace(ehandle,
2802                                                                 0, &extent);
2803                                 if (pctx->errcode) {
2804                                         pctx->errcode = 0;
2805                                         goto alloc_later;
2806                                 }
2807                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
2808                                 if (pctx->errcode)
2809                                         goto failed_add_dir_block;
2810                                 pctx->errcode = ext2fs_extent_goto(ehandle,
2811                                                                 extent.e_lblk);
2812                                 if (pctx->errcode)
2813                                         goto failed_add_dir_block;
2814                                 last_lblk = extent.e_lblk + extent.e_len - 1;
2815                                 failed_csum = 0;
2816                         }
2817                 }
2818 alloc_later:
2819                 while (is_dir && (++pb->last_db_block <
2820                                   (e2_blkcnt_t) extent.e_lblk)) {
2821                         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist,
2822                                                               pb->ino, 0,
2823                                                               pb->last_db_block);
2824                         if (pctx->errcode) {
2825                                 pctx->blk = 0;
2826                                 pctx->num = pb->last_db_block;
2827                                 goto failed_add_dir_block;
2828                         }
2829                 }
2830                 if (!ctx->fs->cluster_ratio_bits) {
2831                         mark_blocks_used(ctx, extent.e_pblk, extent.e_len);
2832                         pb->num_blocks += extent.e_len;
2833                 }
2834                 for (blk = extent.e_pblk, blockcnt = extent.e_lblk, i = 0;
2835                      i < extent.e_len;
2836                      blk++, blockcnt++, i++) {
2837                         if (ctx->fs->cluster_ratio_bits &&
2838                             !(pb->previous_block &&
2839                               (EXT2FS_B2C(ctx->fs, blk) ==
2840                                EXT2FS_B2C(ctx->fs, pb->previous_block)) &&
2841                               (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
2842                               ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
2843                                 mark_block_used(ctx, blk);
2844                                 pb->num_blocks++;
2845                         }
2846                         if (has_unaligned_cluster_map(ctx, pb->previous_block,
2847                                                       pb->last_block, blk,
2848                                                       blockcnt)) {
2849                                 pctx->blk = blockcnt;
2850                                 pctx->blk2 = blk;
2851                                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
2852                                 mark_block_used(ctx, blk);
2853                                 mark_block_used(ctx, blk);
2854                         }
2855                         pb->last_block = blockcnt;
2856                         pb->previous_block = blk;
2857
2858                         if (is_dir) {
2859                                 pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pctx->ino, blk, blockcnt);
2860                                 if (pctx->errcode) {
2861                                         pctx->blk = blk;
2862                                         pctx->num = blockcnt;
2863                                 failed_add_dir_block:
2864                                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
2865                                         /* Should never get here */
2866                                         ctx->flags |= E2F_FLAG_ABORT;
2867                                         return;
2868                                 }
2869                         }
2870                 }
2871                 if (is_dir && extent.e_len > 0)
2872                         pb->last_db_block = blockcnt - 1;
2873                 pb->previous_block = extent.e_pblk + extent.e_len - 1;
2874                 start_block = pb->last_block = last_lblk;
2875                 if (is_leaf && !is_dir &&
2876                     !(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT))
2877                         pb->last_init_lblock = last_lblk;
2878         next:
2879                 pctx->errcode = ext2fs_extent_get(ehandle,
2880                                                   EXT2_EXTENT_NEXT_SIB,
2881                                                   &extent);
2882         }
2883
2884         /* Failed csum but passes checks?  Ask to fix checksum. */
2885         if (failed_csum &&
2886             fix_problem(ctx, PR_1_EXTENT_ONLY_CSUM_INVALID, pctx)) {
2887                 pb->inode_modified = 1;
2888                 pctx->errcode = ext2fs_extent_replace(ehandle, 0, &extent);
2889                 if (pctx->errcode)
2890                         return;
2891         }
2892
2893         if (pctx->errcode == EXT2_ET_EXTENT_NO_NEXT)
2894                 pctx->errcode = 0;
2895 }
2896
2897 static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx,
2898                                  struct process_block_struct *pb)
2899 {
2900         struct ext2_extent_info info;
2901         struct ext2_inode       *inode = pctx->inode;
2902         ext2_extent_handle_t    ehandle;
2903         ext2_filsys             fs = ctx->fs;
2904         ext2_ino_t              ino = pctx->ino;
2905         errcode_t               retval;
2906         blk64_t                 eof_lblk;
2907         struct ext3_extent_header       *eh;
2908
2909         /* Check for a proper extent header... */
2910         eh = (struct ext3_extent_header *) &inode->i_block[0];
2911         retval = ext2fs_extent_header_verify(eh, sizeof(inode->i_block));
2912         if (retval) {
2913                 if (fix_problem(ctx, PR_1_MISSING_EXTENT_HEADER, pctx))
2914                         e2fsck_clear_inode(ctx, ino, inode, 0,
2915                                            "check_blocks_extents");
2916                 pctx->errcode = 0;
2917                 return;
2918         }
2919
2920         /* ...since this function doesn't fail if i_block is zeroed. */
2921         pctx->errcode = ext2fs_extent_open2(fs, ino, inode, &ehandle);
2922         if (pctx->errcode) {
2923                 if (fix_problem(ctx, PR_1_READ_EXTENT, pctx))
2924                         e2fsck_clear_inode(ctx, ino, inode, 0,
2925                                            "check_blocks_extents");
2926                 pctx->errcode = 0;
2927                 return;
2928         }
2929
2930         retval = ext2fs_extent_get_info(ehandle, &info);
2931         if (retval == 0) {
2932                 int max_depth = info.max_depth;
2933
2934                 if (max_depth >= MAX_EXTENT_DEPTH_COUNT)
2935                         max_depth = MAX_EXTENT_DEPTH_COUNT-1;
2936                 ctx->extent_depth_count[max_depth]++;
2937         }
2938
2939         /* Check maximum extent depth */
2940         pctx->blk = info.max_depth;
2941         pctx->blk2 = ext2fs_max_extent_depth(ehandle);
2942         if (pctx->blk2 < pctx->blk &&
2943             fix_problem(ctx, PR_1_EXTENT_BAD_MAX_DEPTH, pctx))
2944                 pb->eti.force_rebuild = 1;
2945
2946         /* Can we collect extent tree level stats? */
2947         pctx->blk = MAX_EXTENT_DEPTH_COUNT;
2948         if (pctx->blk2 > pctx->blk)
2949                 fix_problem(ctx, PR_1E_MAX_EXTENT_TREE_DEPTH, pctx);
2950         memset(pb->eti.ext_info, 0, sizeof(pb->eti.ext_info));
2951         pb->eti.ino = pb->ino;
2952
2953         pb->region = region_create(0, info.max_lblk);
2954         if (!pb->region) {
2955                 ext2fs_extent_free(ehandle);
2956                 fix_problem(ctx, PR_1_EXTENT_ALLOC_REGION_ABORT, pctx);
2957                 ctx->flags |= E2F_FLAG_ABORT;
2958                 return;
2959         }
2960
2961         eof_lblk = ((EXT2_I_SIZE(inode) + fs->blocksize - 1) >>
2962                 EXT2_BLOCK_SIZE_BITS(fs->super)) - 1;
2963         scan_extent_node(ctx, pctx, pb, 0, 0, eof_lblk, ehandle, 1);
2964         if (pctx->errcode &&
2965             fix_problem(ctx, PR_1_EXTENT_ITERATE_FAILURE, pctx)) {
2966                 pb->num_blocks = 0;
2967                 inode->i_blocks = 0;
2968                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
2969                                    "check_blocks_extents");
2970                 pctx->errcode = 0;
2971         }
2972         region_free(pb->region);
2973         pb->region = NULL;
2974         ext2fs_extent_free(ehandle);
2975
2976         /* Rebuild unless it's a dir and we're rehashing it */
2977         if (LINUX_S_ISDIR(inode->i_mode) &&
2978             e2fsck_dir_will_be_rehashed(ctx, ino))
2979                 return;
2980
2981         if (ctx->options & E2F_OPT_CONVERT_BMAP)
2982                 e2fsck_rebuild_extents_later(ctx, ino);
2983         else
2984                 e2fsck_should_rebuild_extents(ctx, pctx, &pb->eti, &info);
2985 }
2986
2987 /*
2988  * In fact we don't need to check blocks for an inode with inline data
2989  * because this inode doesn't have any blocks.  In this function all
2990  * we need to do is add this inode into dblist when it is a directory.
2991  */
2992 static void check_blocks_inline_data(e2fsck_t ctx, struct problem_context *pctx,
2993                                      struct process_block_struct *pb)
2994 {
2995         int     flags;
2996         size_t  inline_data_size = 0;
2997
2998         if (!pb->is_dir) {
2999                 pctx->errcode = 0;
3000                 return;
3001         }
3002
3003         /* Process the dirents in i_block[] as the "first" block. */
3004         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 0);
3005         if (pctx->errcode)
3006                 goto err;
3007
3008         /* Process the dirents in the EA as a "second" block. */
3009         flags = ctx->fs->flags;
3010         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3011         pctx->errcode = ext2fs_inline_data_size(ctx->fs, pb->ino,
3012                                                 &inline_data_size);
3013         ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3014                          (ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3015         if (pctx->errcode) {
3016                 pctx->errcode = 0;
3017                 return;
3018         }
3019
3020         if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE)
3021                 return;
3022
3023         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 1);
3024         if (pctx->errcode)
3025                 goto err;
3026
3027         return;
3028 err:
3029         pctx->blk = 0;
3030         pctx->num = 0;
3031         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3032         ctx->flags |= E2F_FLAG_ABORT;
3033 }
3034
3035 /*
3036  * This subroutine is called on each inode to account for all of the
3037  * blocks used by that inode.
3038  */
3039 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
3040                          char *block_buf)
3041 {
3042         ext2_filsys fs = ctx->fs;
3043         struct process_block_struct pb;
3044         ext2_ino_t      ino = pctx->ino;
3045         struct ext2_inode *inode = pctx->inode;
3046         unsigned        bad_size = 0;
3047         int             dirty_inode = 0;
3048         int             extent_fs;
3049         int             inlinedata_fs;
3050         __u64           size;
3051
3052         pb.ino = ino;
3053         pb.num_blocks = 0;
3054         pb.last_block = ~0;
3055         pb.last_init_lblock = -1;
3056         pb.last_db_block = -1;
3057         pb.num_illegal_blocks = 0;
3058         pb.suppress = 0; pb.clear = 0;
3059         pb.fragmented = 0;
3060         pb.compressed = 0;
3061         pb.previous_block = 0;
3062         pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
3063         pb.is_reg = LINUX_S_ISREG(inode->i_mode);
3064         pb.max_blocks = 1 << (31 - fs->super->s_log_block_size);
3065         pb.inode = inode;
3066         pb.pctx = pctx;
3067         pb.ctx = ctx;
3068         pb.inode_modified = 0;
3069         pb.eti.force_rebuild = 0;
3070         pctx->ino = ino;
3071         pctx->errcode = 0;
3072
3073         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
3074         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
3075
3076         if (check_ext_attr(ctx, pctx, block_buf)) {
3077                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3078                         goto out;
3079                 pb.num_blocks++;
3080         }
3081
3082         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL))
3083                 check_blocks_inline_data(ctx, pctx, &pb);
3084         else if (ext2fs_inode_has_valid_blocks2(fs, inode)) {
3085                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL))
3086                         check_blocks_extents(ctx, pctx, &pb);
3087                 else {
3088                         int flags;
3089                         /*
3090                          * If we've modified the inode, write it out before
3091                          * iterate() tries to use it.
3092                          */
3093                         if (dirty_inode) {
3094                                 e2fsck_write_inode(ctx, ino, inode,
3095                                                    "check_blocks");
3096                                 dirty_inode = 0;
3097                         }
3098                         flags = fs->flags;
3099                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3100                         pctx->errcode = ext2fs_block_iterate3(fs, ino,
3101                                                 pb.is_dir ? BLOCK_FLAG_HOLE : 0,
3102                                                 block_buf, process_block, &pb);
3103                         /*
3104                          * We do not have uninitialized extents in non extent
3105                          * files.
3106                          */
3107                         pb.last_init_lblock = pb.last_block;
3108                         /*
3109                          * If iterate() changed a block mapping, we have to
3110                          * re-read the inode.  If we decide to clear the
3111                          * inode after clearing some stuff, we'll re-write the
3112                          * bad mappings into the inode!
3113                          */
3114                         if (pb.inode_modified)
3115                                 e2fsck_read_inode(ctx, ino, inode,
3116                                                   "check_blocks");
3117                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3118                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3119
3120                         if (ctx->options & E2F_OPT_CONVERT_BMAP) {
3121 #ifdef DEBUG
3122                                 printf("bmap rebuild ino=%d\n", ino);
3123 #endif
3124                                 if (!LINUX_S_ISDIR(inode->i_mode) ||
3125                                     !e2fsck_dir_will_be_rehashed(ctx, ino))
3126                                         e2fsck_rebuild_extents_later(ctx, ino);
3127                         }
3128                 }
3129         }
3130         end_problem_latch(ctx, PR_LATCH_BLOCK);
3131         end_problem_latch(ctx, PR_LATCH_TOOBIG);
3132         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3133                 goto out;
3134         if (pctx->errcode)
3135                 fix_problem(ctx, PR_1_BLOCK_ITERATE, pctx);
3136
3137         if (pb.fragmented && pb.num_blocks < fs->super->s_blocks_per_group) {
3138                 if (LINUX_S_ISDIR(inode->i_mode))
3139                         ctx->fs_fragmented_dir++;
3140                 else
3141                         ctx->fs_fragmented++;
3142         }
3143
3144         if (pb.clear) {
3145                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3146                                    "check_blocks");
3147                 return;
3148         }
3149
3150         if (inode->i_flags & EXT2_INDEX_FL) {
3151                 if (handle_htree(ctx, pctx, ino, inode, block_buf)) {
3152                         inode->i_flags &= ~EXT2_INDEX_FL;
3153                         dirty_inode++;
3154                 } else {
3155                         e2fsck_add_dx_dir(ctx, ino, pb.last_block+1);
3156                 }
3157         }
3158
3159         if (!pb.num_blocks && pb.is_dir &&
3160             !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
3161                 if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) {
3162                         e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks");
3163                         ctx->fs_directory_count--;
3164                         return;
3165                 }
3166         }
3167
3168         if (ino != quota_type2inum(PRJQUOTA, fs->super) &&
3169             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super))) {
3170                 quota_data_add(ctx->qctx, (struct ext2_inode_large *) inode,
3171                                ino, pb.num_blocks * fs->blocksize);
3172                 quota_data_inodes(ctx->qctx, (struct ext2_inode_large *) inode,
3173                                   ino, +1);
3174         }
3175
3176         if (!ext2fs_has_feature_huge_file(fs->super) ||
3177             !(inode->i_flags & EXT4_HUGE_FILE_FL))
3178                 pb.num_blocks *= (fs->blocksize / 512);
3179         pb.num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
3180 #if 0
3181         printf("inode %u, i_size = %u, last_block = %llu, i_blocks=%llu, num_blocks = %llu\n",
3182                ino, inode->i_size, pb.last_block, ext2fs_inode_i_blocks(fs, inode),
3183                pb.num_blocks);
3184 #endif
3185         if (pb.is_dir) {
3186                 unsigned nblock = inode->i_size >> EXT2_BLOCK_SIZE_BITS(fs->super);
3187                 if (inode->i_flags & EXT4_INLINE_DATA_FL) {
3188                         int flags;
3189                         size_t sz = 0;
3190                         errcode_t err;
3191
3192                         flags = ctx->fs->flags;
3193                         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3194                         err = ext2fs_inline_data_size(ctx->fs, pctx->ino,
3195                                                       &sz);
3196                         ctx->fs->flags = (flags &
3197                                           EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3198                                          (ctx->fs->flags &
3199                                           ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3200                         if (err || sz != inode->i_size) {
3201                                 bad_size = 7;
3202                                 pctx->num = sz;
3203                         }
3204                 } else if (inode->i_size & (fs->blocksize - 1))
3205                         bad_size = 5;
3206                 else if (nblock > (pb.last_block + 1))
3207                         bad_size = 1;
3208                 else if (nblock < (pb.last_block + 1)) {
3209                         if (((pb.last_block + 1) - nblock) >
3210                             fs->super->s_prealloc_dir_blocks)
3211                                 bad_size = 2;
3212                 }
3213         } else {
3214                 e2_blkcnt_t blkpg = ctx->blocks_per_page;
3215
3216                 size = EXT2_I_SIZE(inode);
3217                 if ((pb.last_init_lblock >= 0) &&
3218                     /* allow allocated blocks to end of PAGE_SIZE */
3219                     (size < (__u64)pb.last_init_lblock * fs->blocksize) &&
3220                     (pb.last_init_lblock / blkpg * blkpg != pb.last_init_lblock ||
3221                      size < (__u64)(pb.last_init_lblock & ~(blkpg-1)) *
3222                      fs->blocksize))
3223                         bad_size = 3;
3224                 else if (!(extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3225                          size > ext2_max_sizes[fs->super->s_log_block_size])
3226                         /* too big for a direct/indirect-mapped file */
3227                         bad_size = 4;
3228                 else if ((extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3229                          size >
3230                          ((1ULL << (32 + EXT2_BLOCK_SIZE_BITS(fs->super))) - 1))
3231                         /* too big for an extent-based file - 32bit ee_block */
3232                         bad_size = 6;
3233         }
3234         /* i_size for symlinks is checked elsewhere */
3235         if (bad_size && !LINUX_S_ISLNK(inode->i_mode)) {
3236                 /* Did inline_data set pctx->num earlier? */
3237                 if (bad_size != 7)
3238                         pctx->num = (pb.last_block + 1) * fs->blocksize;
3239                 pctx->group = bad_size;
3240                 if (fix_problem(ctx, PR_1_BAD_I_SIZE, pctx)) {
3241                         if (LINUX_S_ISDIR(inode->i_mode))
3242                                 pctx->num &= 0xFFFFFFFFULL;
3243                         ext2fs_inode_size_set(fs, inode, pctx->num);
3244                         if (EXT2_I_SIZE(inode) == 0 &&
3245                             (inode->i_flags & EXT4_INLINE_DATA_FL)) {
3246                                 memset(inode->i_block, 0,
3247                                        sizeof(inode->i_block));
3248                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
3249                         }
3250                         dirty_inode++;
3251                 }
3252                 pctx->num = 0;
3253         }
3254         if (LINUX_S_ISREG(inode->i_mode) &&
3255             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
3256                 ctx->large_files++;
3257         if ((fs->super->s_creator_os == EXT2_OS_LINUX) &&
3258             ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) ||
3259              (ext2fs_has_feature_huge_file(fs->super) &&
3260               (inode->i_flags & EXT4_HUGE_FILE_FL) &&
3261               (inode->osd2.linux2.l_i_blocks_hi != 0)))) {
3262                 pctx->num = pb.num_blocks;
3263                 if (fix_problem(ctx, PR_1_BAD_I_BLOCKS, pctx)) {
3264                         inode->i_blocks = pb.num_blocks;
3265                         inode->osd2.linux2.l_i_blocks_hi = pb.num_blocks >> 32;
3266                         dirty_inode++;
3267                 }
3268                 pctx->num = 0;
3269         }
3270
3271         /*
3272          * The kernel gets mad if we ask it to allocate bigalloc clusters to
3273          * a block mapped file, so rebuild it as an extent file.  We can skip
3274          * symlinks because they're never rewritten.
3275          */
3276         if (ext2fs_has_feature_bigalloc(fs->super) &&
3277             (LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode)) &&
3278             ext2fs_inode_data_blocks2(fs, inode) > 0 &&
3279             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INO(fs->super)) &&
3280             !(inode->i_flags & (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)) &&
3281             fix_problem(ctx, PR_1_NO_BIGALLOC_BLOCKMAP_FILES, pctx)) {
3282                 pctx->errcode = e2fsck_rebuild_extents_later(ctx, ino);
3283                 if (pctx->errcode)
3284                         goto out;
3285         }
3286
3287         if (ctx->dirs_to_hash && pb.is_dir &&
3288             !(ctx->lost_and_found && ctx->lost_and_found == ino) &&
3289             !(inode->i_flags & EXT2_INDEX_FL) &&
3290             ((inode->i_size / fs->blocksize) >= 3))
3291                 e2fsck_rehash_dir_later(ctx, ino);
3292
3293 out:
3294         if (dirty_inode)
3295                 e2fsck_write_inode(ctx, ino, inode, "check_blocks");
3296 }
3297
3298 #if 0
3299 /*
3300  * Helper function called by process block when an illegal block is
3301  * found.  It returns a description about why the block is illegal
3302  */
3303 static char *describe_illegal_block(ext2_filsys fs, blk64_t block)
3304 {
3305         blk64_t super;
3306         int     i;
3307         static char     problem[80];
3308
3309         super = fs->super->s_first_data_block;
3310         strcpy(problem, "PROGRAMMING ERROR: Unknown reason for illegal block");
3311         if (block < super) {
3312                 sprintf(problem, "< FIRSTBLOCK (%u)", super);
3313                 return(problem);
3314         } else if (block >= ext2fs_blocks_count(fs->super)) {
3315                 sprintf(problem, "> BLOCKS (%u)", ext2fs_blocks_count(fs->super));
3316                 return(problem);
3317         }
3318         for (i = 0; i < fs->group_desc_count; i++) {
3319                 if (block == super) {
3320                         sprintf(problem, "is the superblock in group %d", i);
3321                         break;
3322                 }
3323                 if (block > super &&
3324                     block <= (super + fs->desc_blocks)) {
3325                         sprintf(problem, "is in the group descriptors "
3326                                 "of group %d", i);
3327                         break;
3328                 }
3329                 if (block == ext2fs_block_bitmap_loc(fs, i)) {
3330                         sprintf(problem, "is the block bitmap of group %d", i);
3331                         break;
3332                 }
3333                 if (block == ext2fs_inode_bitmap_loc(fs, i)) {
3334                         sprintf(problem, "is the inode bitmap of group %d", i);
3335                         break;
3336                 }
3337                 if (block >= ext2fs_inode_table_loc(fs, i) &&
3338                     (block < ext2fs_inode_table_loc(fs, i)
3339                      + fs->inode_blocks_per_group)) {
3340                         sprintf(problem, "is in the inode table of group %d",
3341                                 i);
3342                         break;
3343                 }
3344                 super += fs->super->s_blocks_per_group;
3345         }
3346         return(problem);
3347 }
3348 #endif
3349
3350 /*
3351  * This is a helper function for check_blocks().
3352  */
3353 static int process_block(ext2_filsys fs,
3354                   blk64_t       *block_nr,
3355                   e2_blkcnt_t blockcnt,
3356                   blk64_t ref_block EXT2FS_ATTR((unused)),
3357                   int ref_offset EXT2FS_ATTR((unused)),
3358                   void *priv_data)
3359 {
3360         struct process_block_struct *p;
3361         struct problem_context *pctx;
3362         blk64_t blk = *block_nr;
3363         int     ret_code = 0;
3364         problem_t       problem = 0;
3365         e2fsck_t        ctx;
3366
3367         p = (struct process_block_struct *) priv_data;
3368         pctx = p->pctx;
3369         ctx = p->ctx;
3370
3371         /*
3372          * For a directory, add logical block zero for processing even if it's
3373          * not mapped or we'll be perennially stuck with broken "." and ".."
3374          * entries.
3375          */
3376         if (p->is_dir && blockcnt == 0 && blk == 0) {
3377                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino, 0, 0);
3378                 if (pctx->errcode) {
3379                         pctx->blk = blk;
3380                         pctx->num = blockcnt;
3381                         goto failed_add_dir_block;
3382                 }
3383                 p->last_db_block++;
3384         }
3385
3386         if (blk == 0)
3387                 return 0;
3388
3389 #if 0
3390         printf("Process_block, inode %lu, block %u, #%d\n", p->ino, blk,
3391                blockcnt);
3392 #endif
3393
3394         /*
3395          * Simplistic fragmentation check.  We merely require that the
3396          * file be contiguous.  (Which can never be true for really
3397          * big files that are greater than a block group.)
3398          */
3399         if (p->previous_block && p->ino != EXT2_RESIZE_INO) {
3400                 if (p->previous_block+1 != blk) {
3401                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3402                                 char type = '?';
3403
3404                                 if (p->is_dir)
3405                                         type = 'd';
3406                                 else if (p->is_reg)
3407                                         type = 'f';
3408
3409                                 printf(_("%6lu(%c): expecting %6lu "
3410                                          "got phys %6lu (blkcnt %lld)\n"),
3411                                        (unsigned long) pctx->ino, type,
3412                                        (unsigned long) p->previous_block+1,
3413                                        (unsigned long) blk,
3414                                        blockcnt);
3415                         }
3416                         p->fragmented = 1;
3417                 }
3418         }
3419
3420         if (p->is_dir && blockcnt > (1 << (21 - fs->super->s_log_block_size)))
3421                 problem = PR_1_TOOBIG_DIR;
3422         if (p->is_reg && p->num_blocks+1 >= p->max_blocks)
3423                 problem = PR_1_TOOBIG_REG;
3424         if (!p->is_dir && !p->is_reg && blockcnt > 0)
3425                 problem = PR_1_TOOBIG_SYMLINK;
3426
3427         if (blk < fs->super->s_first_data_block ||
3428             blk >= ext2fs_blocks_count(fs->super))
3429                 problem = PR_1_ILLEGAL_BLOCK_NUM;
3430
3431         /*
3432          * If this IND/DIND/TIND block is squatting atop some critical metadata
3433          * (group descriptors, superblock, bitmap, inode table), any write to
3434          * "fix" mapping problems will destroy the metadata.  We'll let pass 1b
3435          * fix that and restart fsck.
3436          */
3437         if (blockcnt < 0 &&
3438             p->ino != EXT2_RESIZE_INO &&
3439             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk)) {
3440                 pctx->blk = blk;
3441                 fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx);
3442                 ctx->flags |= E2F_FLAG_RESTART_LATER;
3443         }
3444
3445         if (problem) {
3446                 p->num_illegal_blocks++;
3447                 /*
3448                  * A bit of subterfuge here -- we're trying to fix a block
3449                  * mapping, but the IND/DIND/TIND block could have collided
3450                  * with some critical metadata.  So, fix the in-core mapping so
3451                  * iterate won't go insane, but return 0 instead of
3452                  * BLOCK_CHANGED so that it won't write the remapping out to
3453                  * our multiply linked block.
3454                  *
3455                  * Even if we previously determined that an *IND block
3456                  * conflicts with critical metadata, we must still try to
3457                  * iterate the *IND block as if it is an *IND block to find and
3458                  * mark the blocks it points to.  Better to be overly cautious
3459                  * with the used_blocks map so that we don't move the *IND
3460                  * block to a block that's really in use!
3461                  */
3462                 if (p->ino != EXT2_RESIZE_INO &&
3463                     ref_block != 0 &&
3464                     ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3465                                               ref_block)) {
3466                         *block_nr = 0;
3467                         return 0;
3468                 }
3469                 if (!p->suppress && (p->num_illegal_blocks % 12) == 0) {
3470                         if (fix_problem(ctx, PR_1_TOO_MANY_BAD_BLOCKS, pctx)) {
3471                                 p->clear = 1;
3472                                 return BLOCK_ABORT;
3473                         }
3474                         if (fix_problem(ctx, PR_1_SUPPRESS_MESSAGES, pctx)) {
3475                                 p->suppress = 1;
3476                                 set_latch_flags(PR_LATCH_BLOCK,
3477                                                 PRL_SUPPRESS, 0);
3478                         }
3479                 }
3480                 pctx->blk = blk;
3481                 pctx->blkcount = blockcnt;
3482                 if (fix_problem(ctx, problem, pctx)) {
3483                         blk = *block_nr = 0;
3484                         ret_code = BLOCK_CHANGED;
3485                         p->inode_modified = 1;
3486                         /*
3487                          * If the directory block is too big and is beyond the
3488                          * end of the FS, don't bother trying to add it for
3489                          * processing -- the kernel would never have created a
3490                          * directory this large, and we risk an ENOMEM abort.
3491                          * In any case, the toobig handler for extent-based
3492                          * directories also doesn't feed toobig blocks to
3493                          * pass 2.
3494                          */
3495                         if (problem == PR_1_TOOBIG_DIR)
3496                                 return ret_code;
3497                         goto mark_dir;
3498                 } else
3499                         return 0;
3500         }
3501
3502         if (p->ino == EXT2_RESIZE_INO) {
3503                 /*
3504                  * The resize inode has already be sanity checked
3505                  * during pass #0 (the superblock checks).  All we
3506                  * have to do is mark the double indirect block as
3507                  * being in use; all of the other blocks are handled
3508                  * by mark_table_blocks()).
3509                  */
3510                 if (blockcnt == BLOCK_COUNT_DIND)
3511                         mark_block_used(ctx, blk);
3512                 p->num_blocks++;
3513         } else if (!(ctx->fs->cluster_ratio_bits &&
3514                      p->previous_block &&
3515                      (EXT2FS_B2C(ctx->fs, blk) ==
3516                       EXT2FS_B2C(ctx->fs, p->previous_block)) &&
3517                      (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
3518                      ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
3519                 mark_block_used(ctx, blk);
3520                 p->num_blocks++;
3521         } else if (has_unaligned_cluster_map(ctx, p->previous_block,
3522                                              p->last_block, blk, blockcnt)) {
3523                 pctx->blk = blockcnt;
3524                 pctx->blk2 = blk;
3525                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3526                 mark_block_used(ctx, blk);
3527                 mark_block_used(ctx, blk);
3528         }
3529         if (blockcnt >= 0)
3530                 p->last_block = blockcnt;
3531         p->previous_block = blk;
3532 mark_dir:
3533         if (p->is_dir && (blockcnt >= 0)) {
3534                 while (++p->last_db_block < blockcnt) {
3535                         pctx->errcode = ext2fs_add_dir_block2(fs->dblist,
3536                                                               p->ino, 0,
3537                                                               p->last_db_block);
3538                         if (pctx->errcode) {
3539                                 pctx->blk = 0;
3540                                 pctx->num = p->last_db_block;
3541                                 goto failed_add_dir_block;
3542                         }
3543                 }
3544                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino,
3545                                                       blk, blockcnt);
3546                 if (pctx->errcode) {
3547                         pctx->blk = blk;
3548                         pctx->num = blockcnt;
3549                 failed_add_dir_block:
3550                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3551                         /* Should never get here */
3552                         ctx->flags |= E2F_FLAG_ABORT;
3553                         return BLOCK_ABORT;
3554                 }
3555         }
3556         return ret_code;
3557 }
3558
3559 static int process_bad_block(ext2_filsys fs,
3560                       blk64_t *block_nr,
3561                       e2_blkcnt_t blockcnt,
3562                       blk64_t ref_block EXT2FS_ATTR((unused)),
3563                       int ref_offset EXT2FS_ATTR((unused)),
3564                       void *priv_data)
3565 {
3566         struct process_block_struct *p;
3567         blk64_t         blk = *block_nr;
3568         blk64_t         first_block;
3569         dgrp_t          i;
3570         struct problem_context *pctx;
3571         e2fsck_t        ctx;
3572
3573         if (!blk)
3574                 return 0;
3575
3576         p = (struct process_block_struct *) priv_data;
3577         ctx = p->ctx;
3578         pctx = p->pctx;
3579
3580         pctx->ino = EXT2_BAD_INO;
3581         pctx->blk = blk;
3582         pctx->blkcount = blockcnt;
3583
3584         if ((blk < fs->super->s_first_data_block) ||
3585             (blk >= ext2fs_blocks_count(fs->super))) {
3586                 if (fix_problem(ctx, PR_1_BB_ILLEGAL_BLOCK_NUM, pctx)) {
3587                         *block_nr = 0;
3588                         return BLOCK_CHANGED;
3589                 } else
3590                         return 0;
3591         }
3592
3593         if (blockcnt < 0) {
3594                 if (ext2fs_test_block_bitmap2(p->fs_meta_blocks, blk)) {
3595                         p->bbcheck = 1;
3596                         if (fix_problem(ctx, PR_1_BB_FS_BLOCK, pctx)) {
3597                                 *block_nr = 0;
3598                                 return BLOCK_CHANGED;
3599                         }
3600                 } else if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3601                                                     blk)) {
3602                         p->bbcheck = 1;
3603                         if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK,
3604                                         pctx)) {
3605                                 *block_nr = 0;
3606                                 return BLOCK_CHANGED;
3607                         }
3608                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3609                                 return BLOCK_ABORT;
3610                 } else
3611                         mark_block_used(ctx, blk);
3612                 return 0;
3613         }
3614 #if 0
3615         printf ("DEBUG: Marking %u as bad.\n", blk);
3616 #endif
3617         ctx->fs_badblocks_count++;
3618         /*
3619          * If the block is not used, then mark it as used and return.
3620          * If it is already marked as found, this must mean that
3621          * there's an overlap between the filesystem table blocks
3622          * (bitmaps and inode table) and the bad block list.
3623          */
3624         if (!ext2fs_test_block_bitmap2(ctx->block_found_map, blk)) {
3625                 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
3626                 return 0;
3627         }
3628         /*
3629          * Try to find the where the filesystem block was used...
3630          */
3631         first_block = fs->super->s_first_data_block;
3632
3633         for (i = 0; i < fs->group_desc_count; i++ ) {
3634                 pctx->group = i;
3635                 pctx->blk = blk;
3636                 if (!ext2fs_bg_has_super(fs, i))
3637                         goto skip_super;
3638                 if (blk == first_block) {
3639                         if (i == 0) {
3640                                 if (fix_problem(ctx,
3641                                                 PR_1_BAD_PRIMARY_SUPERBLOCK,
3642                                                 pctx)) {
3643                                         *block_nr = 0;
3644                                         return BLOCK_CHANGED;
3645                                 }
3646                                 return 0;
3647                         }
3648                         fix_problem(ctx, PR_1_BAD_SUPERBLOCK, pctx);
3649                         return 0;
3650                 }
3651                 if ((blk > first_block) &&
3652                     (blk <= first_block + fs->desc_blocks)) {
3653                         if (i == 0) {
3654                                 pctx->blk = *block_nr;
3655                                 if (fix_problem(ctx,
3656                         PR_1_BAD_PRIMARY_GROUP_DESCRIPTOR, pctx)) {
3657                                         *block_nr = 0;
3658                                         return BLOCK_CHANGED;
3659                                 }
3660                                 return 0;
3661                         }
3662                         fix_problem(ctx, PR_1_BAD_GROUP_DESCRIPTORS, pctx);
3663                         return 0;
3664                 }
3665         skip_super:
3666                 if (blk == ext2fs_block_bitmap_loc(fs, i)) {
3667                         if (fix_problem(ctx, PR_1_BB_BAD_BLOCK, pctx)) {
3668                                 ctx->invalid_block_bitmap_flag[i]++;
3669                                 ctx->invalid_bitmaps++;
3670                         }
3671                         return 0;
3672                 }
3673                 if (blk == ext2fs_inode_bitmap_loc(fs, i)) {
3674                         if (fix_problem(ctx, PR_1_IB_BAD_BLOCK, pctx)) {
3675                                 ctx->invalid_inode_bitmap_flag[i]++;
3676                                 ctx->invalid_bitmaps++;
3677                         }
3678                         return 0;
3679                 }
3680                 if ((blk >= ext2fs_inode_table_loc(fs, i)) &&
3681                     (blk < (ext2fs_inode_table_loc(fs, i) +
3682                             fs->inode_blocks_per_group))) {
3683                         /*
3684                          * If there are bad blocks in the inode table,
3685                          * the inode scan code will try to do
3686                          * something reasonable automatically.
3687                          */
3688                         return 0;
3689                 }
3690                 first_block += fs->super->s_blocks_per_group;
3691         }
3692         /*
3693          * If we've gotten to this point, then the only
3694          * possibility is that the bad block inode meta data
3695          * is using a bad block.
3696          */
3697         if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) ||
3698             (blk == p->inode->i_block[EXT2_DIND_BLOCK]) ||
3699             (blk == p->inode->i_block[EXT2_TIND_BLOCK])) {
3700                 p->bbcheck = 1;
3701                 if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, pctx)) {
3702                         *block_nr = 0;
3703                         return BLOCK_CHANGED;
3704                 }
3705                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3706                         return BLOCK_ABORT;
3707                 return 0;
3708         }
3709
3710         pctx->group = -1;
3711
3712         /* Warn user that the block wasn't claimed */
3713         fix_problem(ctx, PR_1_PROGERR_CLAIMED_BLOCK, pctx);
3714
3715         return 0;
3716 }
3717
3718 static void new_table_block(e2fsck_t ctx, blk64_t first_block, dgrp_t group,
3719                             const char *name, int num, blk64_t *new_block)
3720 {
3721         ext2_filsys fs = ctx->fs;
3722         dgrp_t          last_grp;
3723         blk64_t         old_block = *new_block;
3724         blk64_t         last_block;
3725         dgrp_t          flexbg;
3726         unsigned        flexbg_size;
3727         int             i, is_flexbg;
3728         char            *buf;
3729         struct problem_context  pctx;
3730
3731         clear_problem_context(&pctx);
3732
3733         pctx.group = group;
3734         pctx.blk = old_block;
3735         pctx.str = name;
3736
3737         /*
3738          * For flex_bg filesystems, first try to allocate the metadata
3739          * within the flex_bg, and if that fails then try finding the
3740          * space anywhere in the filesystem.
3741          */
3742         is_flexbg = ext2fs_has_feature_flex_bg(fs->super);
3743         if (is_flexbg) {
3744                 flexbg_size = 1 << fs->super->s_log_groups_per_flex;
3745                 flexbg = group / flexbg_size;
3746                 first_block = ext2fs_group_first_block2(fs,
3747                                                         flexbg_size * flexbg);
3748                 last_grp = group | (flexbg_size - 1);
3749                 if (last_grp >= fs->group_desc_count)
3750                         last_grp = fs->group_desc_count - 1;
3751                 last_block = ext2fs_group_last_block2(fs, last_grp);
3752         } else
3753                 last_block = ext2fs_group_last_block2(fs, group);
3754         pctx.errcode = ext2fs_get_free_blocks2(fs, first_block, last_block,
3755                                                num, ctx->block_found_map,
3756                                                new_block);
3757         if (is_flexbg && (pctx.errcode == EXT2_ET_BLOCK_ALLOC_FAIL))
3758                 pctx.errcode = ext2fs_get_free_blocks2(fs,
3759                                 fs->super->s_first_data_block,
3760                                 ext2fs_blocks_count(fs->super),
3761                                 num, ctx->block_found_map, new_block);
3762         if (pctx.errcode) {
3763                 pctx.num = num;
3764                 fix_problem(ctx, PR_1_RELOC_BLOCK_ALLOCATE, &pctx);
3765                 ext2fs_unmark_valid(fs);
3766                 ctx->flags |= E2F_FLAG_ABORT;
3767                 return;
3768         }
3769         pctx.errcode = ext2fs_get_mem(fs->blocksize, &buf);
3770         if (pctx.errcode) {
3771                 fix_problem(ctx, PR_1_RELOC_MEMORY_ALLOCATE, &pctx);
3772                 ext2fs_unmark_valid(fs);
3773                 ctx->flags |= E2F_FLAG_ABORT;
3774                 return;
3775         }
3776         ext2fs_mark_super_dirty(fs);
3777         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
3778         pctx.blk2 = *new_block;
3779         fix_problem(ctx, (old_block ? PR_1_RELOC_FROM_TO :
3780                           PR_1_RELOC_TO), &pctx);
3781         pctx.blk2 = 0;
3782         for (i = 0; i < num; i++) {
3783                 pctx.blk = i;
3784                 ext2fs_mark_block_bitmap2(ctx->block_found_map, (*new_block)+i);
3785                 if (old_block) {
3786                         pctx.errcode = io_channel_read_blk64(fs->io,
3787                                    old_block + i, 1, buf);
3788                         if (pctx.errcode)
3789                                 fix_problem(ctx, PR_1_RELOC_READ_ERR, &pctx);
3790                         pctx.blk = (*new_block) + i;
3791                         pctx.errcode = io_channel_write_blk64(fs->io, pctx.blk,
3792                                                               1, buf);
3793                 } else {
3794                         pctx.blk = (*new_block) + i;
3795                         pctx.errcode = ext2fs_zero_blocks2(fs, pctx.blk, 1,
3796                                                            NULL, NULL);
3797                 }
3798
3799                 if (pctx.errcode)
3800                         fix_problem(ctx, PR_1_RELOC_WRITE_ERR, &pctx);
3801         }
3802         ext2fs_free_mem(&buf);
3803 }
3804
3805 /*
3806  * This routine gets called at the end of pass 1 if bad blocks are
3807  * detected in the superblock, group descriptors, inode_bitmaps, or
3808  * block bitmaps.  At this point, all of the blocks have been mapped
3809  * out, so we can try to allocate new block(s) to replace the bad
3810  * blocks.
3811  */
3812 static void handle_fs_bad_blocks(e2fsck_t ctx)
3813 {
3814         ext2_filsys fs = ctx->fs;
3815         dgrp_t          i;
3816         blk64_t         first_block;
3817         blk64_t         new_blk;
3818
3819         for (i = 0; i < fs->group_desc_count; i++) {
3820                 first_block = ext2fs_group_first_block2(fs, i);
3821
3822                 if (ctx->invalid_block_bitmap_flag[i]) {
3823                         new_blk = ext2fs_block_bitmap_loc(fs, i);
3824                         new_table_block(ctx, first_block, i, _("block bitmap"),
3825                                         1, &new_blk);
3826                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
3827                 }
3828                 if (ctx->invalid_inode_bitmap_flag[i]) {
3829                         new_blk = ext2fs_inode_bitmap_loc(fs, i);
3830                         new_table_block(ctx, first_block, i, _("inode bitmap"),
3831                                         1, &new_blk);
3832                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
3833                 }
3834                 if (ctx->invalid_inode_table_flag[i]) {
3835                         new_blk = ext2fs_inode_table_loc(fs, i);
3836                         new_table_block(ctx, first_block, i, _("inode table"),
3837                                         fs->inode_blocks_per_group,
3838                                         &new_blk);
3839                         ext2fs_inode_table_loc_set(fs, i, new_blk);
3840                         ctx->flags |= E2F_FLAG_RESTART;
3841                 }
3842         }
3843         ctx->invalid_bitmaps = 0;
3844 }
3845
3846 /*
3847  * This routine marks all blocks which are used by the superblock,
3848  * group descriptors, inode bitmaps, and block bitmaps.
3849  */
3850 static void mark_table_blocks(e2fsck_t ctx)
3851 {
3852         ext2_filsys fs = ctx->fs;
3853         blk64_t b;
3854         dgrp_t  i;
3855         unsigned int    j;
3856         struct problem_context pctx;
3857
3858         clear_problem_context(&pctx);
3859
3860         for (i = 0; i < fs->group_desc_count; i++) {
3861                 pctx.group = i;
3862
3863                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_found_map);
3864                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_metadata_map);
3865
3866                 /*
3867                  * Mark the blocks used for the inode table
3868                  */
3869                 if (ext2fs_inode_table_loc(fs, i)) {
3870                         for (j = 0, b = ext2fs_inode_table_loc(fs, i);
3871                              j < fs->inode_blocks_per_group;
3872                              j++, b++) {
3873                                 if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3874                                                              b)) {
3875                                         pctx.blk = b;
3876                                         if (!ctx->invalid_inode_table_flag[i] &&
3877                                             fix_problem(ctx,
3878                                                 PR_1_ITABLE_CONFLICT, &pctx)) {
3879                                                 ctx->invalid_inode_table_flag[i]++;
3880                                                 ctx->invalid_bitmaps++;
3881                                         }
3882                                 } else {
3883                                     ext2fs_mark_block_bitmap2(
3884                                                 ctx->block_found_map, b);
3885                                     ext2fs_mark_block_bitmap2(
3886                                                 ctx->block_metadata_map, b);
3887                                 }
3888                         }
3889                 }
3890
3891                 /*
3892                  * Mark block used for the block bitmap
3893                  */
3894                 if (ext2fs_block_bitmap_loc(fs, i)) {
3895                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3896                                      ext2fs_block_bitmap_loc(fs, i))) {
3897                                 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
3898                                 if (fix_problem(ctx, PR_1_BB_CONFLICT, &pctx)) {
3899                                         ctx->invalid_block_bitmap_flag[i]++;
3900                                         ctx->invalid_bitmaps++;
3901                                 }
3902                         } else {
3903                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
3904                                      ext2fs_block_bitmap_loc(fs, i));
3905                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
3906                                      ext2fs_block_bitmap_loc(fs, i));
3907                         }
3908                 }
3909                 /*
3910                  * Mark block used for the inode bitmap
3911                  */
3912                 if (ext2fs_inode_bitmap_loc(fs, i)) {
3913                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3914                                      ext2fs_inode_bitmap_loc(fs, i))) {
3915                                 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
3916                                 if (fix_problem(ctx, PR_1_IB_CONFLICT, &pctx)) {
3917                                         ctx->invalid_inode_bitmap_flag[i]++;
3918                                         ctx->invalid_bitmaps++;
3919                                 }
3920                         } else {
3921                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
3922                                      ext2fs_inode_bitmap_loc(fs, i));
3923                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
3924                                      ext2fs_inode_bitmap_loc(fs, i));
3925                         }
3926                 }
3927         }
3928 }
3929
3930 /*
3931  * Thes subroutines short circuits ext2fs_get_blocks and
3932  * ext2fs_check_directory; we use them since we already have the inode
3933  * structure, so there's no point in letting the ext2fs library read
3934  * the inode again.
3935  */
3936 static errcode_t pass1_get_blocks(ext2_filsys fs, ext2_ino_t ino,
3937                                   blk_t *blocks)
3938 {
3939         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3940         int     i;
3941
3942         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
3943                 return EXT2_ET_CALLBACK_NOTHANDLED;
3944
3945         for (i=0; i < EXT2_N_BLOCKS; i++)
3946                 blocks[i] = ctx->stashed_inode->i_block[i];
3947         return 0;
3948 }
3949
3950 static errcode_t pass1_read_inode(ext2_filsys fs, ext2_ino_t ino,
3951                                   struct ext2_inode *inode)
3952 {
3953         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3954
3955         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
3956                 return EXT2_ET_CALLBACK_NOTHANDLED;
3957         *inode = *ctx->stashed_inode;
3958         return 0;
3959 }
3960
3961 static errcode_t pass1_write_inode(ext2_filsys fs, ext2_ino_t ino,
3962                             struct ext2_inode *inode)
3963 {
3964         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3965
3966         if ((ino == ctx->stashed_ino) && ctx->stashed_inode &&
3967                 (inode != ctx->stashed_inode))
3968                 *ctx->stashed_inode = *inode;
3969         return EXT2_ET_CALLBACK_NOTHANDLED;
3970 }
3971
3972 static errcode_t pass1_check_directory(ext2_filsys fs, ext2_ino_t ino)
3973 {
3974         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3975
3976         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
3977                 return EXT2_ET_CALLBACK_NOTHANDLED;
3978
3979         if (!LINUX_S_ISDIR(ctx->stashed_inode->i_mode))
3980                 return EXT2_ET_NO_DIRECTORY;
3981         return 0;
3982 }
3983
3984 static errcode_t e2fsck_get_alloc_block(ext2_filsys fs, blk64_t goal,
3985                                         blk64_t *ret)
3986 {
3987         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3988         errcode_t       retval;
3989         blk64_t         new_block;
3990
3991         if (ctx->block_found_map) {
3992                 retval = ext2fs_new_block2(fs, goal, ctx->block_found_map,
3993                                            &new_block);
3994                 if (retval)
3995                         return retval;
3996                 if (fs->block_map) {
3997                         ext2fs_mark_block_bitmap2(fs->block_map, new_block);
3998                         ext2fs_mark_bb_dirty(fs);
3999                 }
4000         } else {
4001                 if (!fs->block_map) {
4002                         retval = ext2fs_read_block_bitmap(fs);
4003                         if (retval)
4004                                 return retval;
4005                 }
4006
4007                 retval = ext2fs_new_block2(fs, goal, fs->block_map, &new_block);
4008                 if (retval)
4009                         return retval;
4010         }
4011
4012         *ret = new_block;
4013         return (0);
4014 }
4015
4016 static errcode_t e2fsck_new_range(ext2_filsys fs, int flags, blk64_t goal,
4017                                   blk64_t len, blk64_t *pblk, blk64_t *plen)
4018 {
4019         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4020         errcode_t       retval;
4021
4022         if (ctx->block_found_map)
4023                 return ext2fs_new_range(fs, flags, goal, len,
4024                                         ctx->block_found_map, pblk, plen);
4025
4026         if (!fs->block_map) {
4027                 retval = ext2fs_read_block_bitmap(fs);
4028                 if (retval)
4029                         return retval;
4030         }
4031
4032         return ext2fs_new_range(fs, flags, goal, len, fs->block_map,
4033                                 pblk, plen);
4034 }
4035
4036 static void e2fsck_block_alloc_stats(ext2_filsys fs, blk64_t blk, int inuse)
4037 {
4038         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4039
4040         /* Never free a critical metadata block */
4041         if (ctx->block_found_map &&
4042             ctx->block_metadata_map &&
4043             inuse < 0 &&
4044             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk))
4045                 return;
4046
4047         if (ctx->block_found_map) {
4048                 if (inuse > 0)
4049                         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4050                 else
4051                         ext2fs_unmark_block_bitmap2(ctx->block_found_map, blk);
4052         }
4053 }
4054
4055 static void e2fsck_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
4056                                            blk_t num, int inuse)
4057 {
4058         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4059
4060         /* Never free a critical metadata block */
4061         if (ctx->block_found_map &&
4062             ctx->block_metadata_map &&
4063             inuse < 0 &&
4064             ext2fs_test_block_bitmap_range2(ctx->block_metadata_map, blk, num))
4065                 return;
4066
4067         if (ctx->block_found_map) {
4068                 if (inuse > 0)
4069                         ext2fs_mark_block_bitmap_range2(ctx->block_found_map,
4070                                                         blk, num);
4071                 else
4072                         ext2fs_unmark_block_bitmap_range2(ctx->block_found_map,
4073                                                         blk, num);
4074         }
4075 }
4076
4077 void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts)
4078 {
4079         ext2_filsys fs = ctx->fs;
4080
4081         if (use_shortcuts) {
4082                 fs->get_blocks = pass1_get_blocks;
4083                 fs->check_directory = pass1_check_directory;
4084                 fs->read_inode = pass1_read_inode;
4085                 fs->write_inode = pass1_write_inode;
4086                 ctx->stashed_ino = 0;
4087         } else {
4088                 fs->get_blocks = 0;
4089                 fs->check_directory = 0;
4090                 fs->read_inode = 0;
4091                 fs->write_inode = 0;
4092         }
4093 }
4094
4095 void e2fsck_intercept_block_allocations(e2fsck_t ctx)
4096 {
4097         ext2fs_set_alloc_block_callback(ctx->fs, e2fsck_get_alloc_block, 0);
4098         ext2fs_set_block_alloc_stats_callback(ctx->fs,
4099                                                 e2fsck_block_alloc_stats, 0);
4100         ext2fs_set_new_range_callback(ctx->fs, e2fsck_new_range, NULL);
4101         ext2fs_set_block_alloc_stats_range_callback(ctx->fs,
4102                                         e2fsck_block_alloc_stats_range, NULL);
4103 }