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 extern errcode_t e2fsck_setup_icount(e2fsck_t ctx, const char *icount_name,
 701                                      int flags, ext2_icount_t hint,
 702                                      ext2_icount_t *ret)
 703 {
 704         unsigned int            threshold;
 705         unsigned int            save_type;
 706         ext2_ino_t              num_dirs;
 707         errcode_t               retval;
 708         char                    *tdb_dir;
 709         int                     enable;
 710
 711         *ret = 0;
 712
 713         profile_get_string(ctx->profile, "scratch_files", "directory", 0, 0,
 714                            &tdb_dir);
 715         profile_get_uint(ctx->profile, "scratch_files",
 716                          "numdirs_threshold", 0, 0, &threshold);
 717         profile_get_boolean(ctx->profile, "scratch_files",
 718                             "icount", 0, 1, &enable);
 719
 720         retval = ext2fs_get_num_dirs(ctx->fs, &num_dirs);
 721         if (retval)
 722                 num_dirs = 1024;        /* Guess */
 723
 724         if (enable && tdb_dir && !access(tdb_dir, W_OK) &&
 725             (!threshold || num_dirs > threshold)) {
 726                 retval = ext2fs_create_icount_tdb(ctx->fs, tdb_dir,
 727                                                   flags, ret);
 728                 if (retval == 0)
 729                         return 0;
 730         }
 731         e2fsck_set_bitmap_type(ctx->fs, EXT2FS_BMAP64_RBTREE, icount_name,
 732                                &save_type);
 733         retval = ext2fs_create_icount2(ctx->fs, flags, 0, hint, ret);
 734         ctx->fs->default_bitmap_type = save_type;
 735         return retval;
 736 }
 737
 738 static errcode_t recheck_bad_inode_checksum(ext2_filsys fs, ext2_ino_t ino,
 739                                             e2fsck_t ctx,
 740                                             struct problem_context *pctx)
 741 {
 742         errcode_t retval;
 743         struct ext2_inode_large inode;
 744
 745         /*
 746          * Reread inode.  If we don't see checksum error, then this inode
 747          * has been fixed elsewhere.
 748          */
 749         ctx->stashed_ino = 0;
 750         retval = ext2fs_read_inode_full(fs, ino, (struct ext2_inode *)&inode,
 751                                         sizeof(inode));
 752         if (retval && retval != EXT2_ET_INODE_CSUM_INVALID)
 753                 return retval;
 754         if (!retval)
 755                 return 0;
 756
 757         /*
 758          * Checksum still doesn't match.  That implies that the inode passes
 759          * all the sanity checks, so maybe the checksum is simply corrupt.
 760          * See if the user will go for fixing that.
 761          */
 762         if (!fix_problem(ctx, PR_1_INODE_ONLY_CSUM_INVALID, pctx))
 763                 return 0;
 764
 765         retval = ext2fs_write_inode_full(fs, ino, (struct ext2_inode *)&inode,
 766                                          sizeof(inode));
 767         return retval;
 768 }
 769
 770 static void reserve_block_for_root_repair(e2fsck_t ctx)
 771 {
 772         blk64_t         blk = 0;
 773         errcode_t       err;
 774         ext2_filsys     fs = ctx->fs;
 775
 776         ctx->root_repair_block = 0;
 777         if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO))
 778                 return;
 779
 780         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 781         if (err)
 782                 return;
 783         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 784         ctx->root_repair_block = blk;
 785 }
 786
 787 static void reserve_block_for_lnf_repair(e2fsck_t ctx)
 788 {
 789         blk64_t         blk = 0;
 790         errcode_t       err;
 791         ext2_filsys     fs = ctx->fs;
 792         static const char name[] = "lost+found";
 793         ext2_ino_t      ino;
 794
 795         ctx->lnf_repair_block = 0;
 796         if (!ext2fs_lookup(fs, EXT2_ROOT_INO, name, sizeof(name)-1, 0, &ino))
 797                 return;
 798
 799         err = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
 800         if (err)
 801                 return;
 802         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
 803         ctx->lnf_repair_block = blk;
 804 }
 805
 806 static errcode_t get_inline_data_ea_size(ext2_filsys fs, ext2_ino_t ino,
 807                                          size_t *sz)
 808 {
 809         void *p;
 810         struct ext2_xattr_handle *handle;
 811         errcode_t retval;
 812
 813         retval = ext2fs_xattrs_open(fs, ino, &handle);
 814         if (retval)
 815                 return retval;
 816
 817         retval = ext2fs_xattrs_read(handle);
 818         if (retval)
 819                 goto err;
 820
 821         retval = ext2fs_xattr_get(handle, "system.data", &p, sz);
 822         if (retval)
 823                 goto err;
 824         ext2fs_free_mem(&p);
 825 err:
 826         (void) ext2fs_xattrs_close(&handle);
 827         return retval;
 828 }
 829
 830 static void finish_processing_inode(e2fsck_t ctx, ext2_ino_t ino,
 831                                     struct problem_context *pctx,
 832                                     int failed_csum)
 833 {
 834         if (!failed_csum)
 835                 return;
 836
 837         /*
 838          * If the inode failed the checksum and the user didn't
 839          * clear the inode, test the checksum again -- if it still
 840          * fails, ask the user if the checksum should be corrected.
 841          */
 842         pctx->errcode = recheck_bad_inode_checksum(ctx->fs, ino, ctx, pctx);
 843         if (pctx->errcode)
 844                 ctx->flags |= E2F_FLAG_ABORT;
 845 }
 846 #define FINISH_INODE_LOOP(ctx, ino, pctx, failed_csum) \
 847         do { \
 848                 finish_processing_inode((ctx), (ino), (pctx), (failed_csum)); \
 849                 if ((ctx)->flags & E2F_FLAG_ABORT) \
 850                         return; \
 851         } while (0)
 852
 853 static int could_be_block_map(ext2_filsys fs, struct ext2_inode *inode)
 854 {
 855         __u32 x;
 856         int i;
 857
 858         for (i = 0; i < EXT2_N_BLOCKS; i++) {
 859                 x = inode->i_block[i];
 860 #ifdef WORDS_BIGENDIAN
 861                 x = ext2fs_swab32(x);
 862 #endif
 863                 if (x >= ext2fs_blocks_count(fs->super))
 864                         return 0;
 865         }
 866
 867         return 1;
 868 }
 869
 870 /*
 871  * Figure out what to do with an inode that has both extents and inline data
 872  * inode flags set.  Returns -1 if we decide to erase the inode, 0 otherwise.
 873  */
 874 static int fix_inline_data_extents_file(e2fsck_t ctx,
 875                                         ext2_ino_t ino,
 876                                         struct ext2_inode *inode,
 877                                         int inode_size,
 878                                         struct problem_context *pctx)
 879 {
 880         size_t max_inline_ea_size;
 881         ext2_filsys fs = ctx->fs;
 882         int dirty = 0;
 883
 884         /* Both feature flags not set?  Just run the regular checks */
 885         if (!ext2fs_has_feature_extents(fs->super) &&
 886             !ext2fs_has_feature_inline_data(fs->super))
 887                 return 0;
 888
 889         /* Clear both flags if it's a special file */
 890         if (LINUX_S_ISCHR(inode->i_mode) ||
 891             LINUX_S_ISBLK(inode->i_mode) ||
 892             LINUX_S_ISFIFO(inode->i_mode) ||
 893             LINUX_S_ISSOCK(inode->i_mode)) {
 894                 check_extents_inlinedata(ctx, pctx);
 895                 return 0;
 896         }
 897
 898         /* If it looks like an extent tree, try to clear inlinedata */
 899         if (ext2fs_extent_header_verify(inode->i_block,
 900                                  sizeof(inode->i_block)) == 0 &&
 901             fix_problem(ctx, PR_1_CLEAR_INLINE_DATA_FOR_EXTENT, pctx)) {
 902                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
 903                 dirty = 1;
 904                 goto out;
 905         }
 906
 907         /* If it looks short enough to be inline data, try to clear extents */
 908         if (inode_size > EXT2_GOOD_OLD_INODE_SIZE)
 909                 max_inline_ea_size = inode_size -
 910                                      (EXT2_GOOD_OLD_INODE_SIZE +
 911                                       ((struct ext2_inode_large *)inode)->i_extra_isize);
 912         else
 913                 max_inline_ea_size = 0;
 914         if (EXT2_I_SIZE(inode) <
 915             EXT4_MIN_INLINE_DATA_SIZE + max_inline_ea_size &&
 916             fix_problem(ctx, PR_1_CLEAR_EXTENT_FOR_INLINE_DATA, pctx)) {
 917                 inode->i_flags &= ~EXT4_EXTENTS_FL;
 918                 dirty = 1;
 919                 goto out;
 920         }
 921
 922         /*
 923          * Too big for inline data, but no evidence of extent tree -
 924          * maybe it's a block map file?  If the mappings all look valid?
 925          */
 926         if (could_be_block_map(fs, inode) &&
 927             fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_FLAGS, pctx)) {
 928 #ifdef WORDS_BIGENDIAN
 929                 int i;
 930
 931                 for (i = 0; i < EXT2_N_BLOCKS; i++)
 932                         inode->i_block[i] = ext2fs_swab32(inode->i_block[i]);
 933 #endif
 934
 935                 inode->i_flags &= ~(EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL);
 936                 dirty = 1;
 937                 goto out;
 938         }
 939
 940         /* Oh well, just clear the busted inode. */
 941         if (fix_problem(ctx, PR_1_CLEAR_EXTENT_INLINE_DATA_INODE, pctx)) {
 942                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
 943                 return -1;
 944         }
 945
 946 out:
 947         if (dirty)
 948                 e2fsck_write_inode(ctx, ino, inode, "pass1");
 949
 950         return 0;
 951 }
 952
 953 static void pass1_readahead(e2fsck_t ctx, dgrp_t *group, ext2_ino_t *next_ino)
 954 {
 955         ext2_ino_t inodes_in_group = 0, inodes_per_block, inodes_per_buffer;
 956         dgrp_t start = *group, grp;
 957         blk64_t blocks_to_read = 0;
 958         errcode_t err = EXT2_ET_INVALID_ARGUMENT;
 959
 960         if (ctx->readahead_kb == 0)
 961                 goto out;
 962
 963         /* Keep iterating groups until we have enough to readahead */
 964         inodes_per_block = EXT2_INODES_PER_BLOCK(ctx->fs->super);
 965         for (grp = start; grp < ctx->fs->group_desc_count; grp++) {
 966                 if (ext2fs_bg_flags_test(ctx->fs, grp, EXT2_BG_INODE_UNINIT))
 967                         continue;
 968                 inodes_in_group = ctx->fs->super->s_inodes_per_group -
 969                                         ext2fs_bg_itable_unused(ctx->fs, grp);
 970                 blocks_to_read += (inodes_in_group + inodes_per_block - 1) /
 971                                         inodes_per_block;
 972                 if (blocks_to_read * ctx->fs->blocksize >
 973                     ctx->readahead_kb * 1024)
 974                         break;
 975         }
 976
 977         err = e2fsck_readahead(ctx->fs, E2FSCK_READA_ITABLE, start,
 978                                grp - start + 1);
 979         if (err == EAGAIN) {
 980                 ctx->readahead_kb /= 2;
 981                 err = 0;
 982         }
 983
 984 out:
 985         if (err) {
 986                 /* Error; disable itable readahead */
 987                 *group = ctx->fs->group_desc_count;
 988                 *next_ino = ctx->fs->super->s_inodes_count;
 989         } else {
 990                 /*
 991                  * Don't do more readahead until we've reached the first inode
 992                  * of the last inode scan buffer block for the last group.
 993                  */
 994                 *group = grp + 1;
 995                 inodes_per_buffer = (ctx->inode_buffer_blocks ?
 996                                      ctx->inode_buffer_blocks :
 997                                      EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS) *
 998                                     ctx->fs->blocksize /
 999                                     EXT2_INODE_SIZE(ctx->fs->super);
1000                 inodes_in_group--;
1001                 *next_ino = inodes_in_group -
1002                             (inodes_in_group % inodes_per_buffer) + 1 +
1003                             (grp * ctx->fs->super->s_inodes_per_group);
1004         }
1005 }
1006
1007 /*
1008  * Check if the passed ino is one of the used superblock quota inodes.
1009  *
1010  * Before the quota inodes were journaled, older superblock quota inodes
1011  * were just regular files in the filesystem and not reserved inodes.  This
1012  * checks if the passed ino is one of the s_*_quota_inum superblock fields,
1013  * which may not always be the same as the EXT4_*_QUOTA_INO fields.
1014  */
1015 static int quota_inum_is_super(struct ext2_super_block *sb, ext2_ino_t ino)
1016 {
1017         enum quota_type qtype;
1018
1019         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1020                 if (*quota_sb_inump(sb, qtype) == ino)
1021                         return 1;
1022
1023         return 0;
1024 }
1025
1026 /*
1027  * Check if the passed ino is one of the reserved quota inodes.
1028  * This checks if the inode number is one of the reserved EXT4_*_QUOTA_INO
1029  * inodes.  These inodes may or may not be in use by the quota feature.
1030  */
1031 static int quota_inum_is_reserved(ext2_filsys fs, ext2_ino_t ino)
1032 {
1033         enum quota_type qtype;
1034
1035         for (qtype = 0; qtype < MAXQUOTAS; qtype++)
1036                 if (quota_type2inum(qtype, fs->super) == ino)
1037                         return 1;
1038
1039         return 0;
1040 }
1041
1042 void e2fsck_pass1(e2fsck_t ctx)
1043 {
1044         int     i;
1045         __u64   max_sizes;
1046         ext2_filsys fs = ctx->fs;
1047         ext2_ino_t      ino = 0;
1048         struct ext2_inode *inode = NULL;
1049         ext2_inode_scan scan = NULL;
1050         char            *block_buf = NULL;
1051 #ifdef RESOURCE_TRACK
1052         struct resource_track   rtrack;
1053 #endif
1054         unsigned char   frag, fsize;
1055         struct          problem_context pctx;
1056         struct          scan_callback_struct scan_struct;
1057         struct ext2_super_block *sb = ctx->fs->super;
1058         const char      *old_op;
1059         int             imagic_fs, extent_fs, inlinedata_fs;
1060         int             low_dtime_check = 1;
1061         int             inode_size = EXT2_INODE_SIZE(fs->super);
1062         int             failed_csum = 0;
1063         ext2_ino_t      ino_threshold = 0;
1064         dgrp_t          ra_group = 0;
1065
1066         init_resource_track(&rtrack, ctx->fs->io);
1067         clear_problem_context(&pctx);
1068
1069         /* If we can do readahead, figure out how many groups to pull in. */
1070         if (!e2fsck_can_readahead(ctx->fs))
1071                 ctx->readahead_kb = 0;
1072         else if (ctx->readahead_kb == ~0ULL)
1073                 ctx->readahead_kb = e2fsck_guess_readahead(ctx->fs);
1074         pass1_readahead(ctx, &ra_group, &ino_threshold);
1075
1076         if (!(ctx->options & E2F_OPT_PREEN))
1077                 fix_problem(ctx, PR_1_PASS_HEADER, &pctx);
1078
1079         if (ext2fs_has_feature_dir_index(fs->super) &&
1080             !(ctx->options & E2F_OPT_NO)) {
1081                 if (ext2fs_u32_list_create(&ctx->dirs_to_hash, 50))
1082                         ctx->dirs_to_hash = 0;
1083         }
1084
1085 #ifdef MTRACE
1086         mtrace_print("Pass 1");
1087 #endif
1088
1089 #define EXT2_BPP(bits) (1ULL << ((bits) - 2))
1090
1091         for (i = EXT2_MIN_BLOCK_LOG_SIZE; i <= EXT2_MAX_BLOCK_LOG_SIZE; i++) {
1092                 max_sizes = EXT2_NDIR_BLOCKS + EXT2_BPP(i);
1093                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i);
1094                 max_sizes = max_sizes + EXT2_BPP(i) * EXT2_BPP(i) * EXT2_BPP(i);
1095                 max_sizes = (max_sizes * (1UL << i));
1096                 ext2_max_sizes[i - EXT2_MIN_BLOCK_LOG_SIZE] = max_sizes;
1097         }
1098 #undef EXT2_BPP
1099
1100         imagic_fs = ext2fs_has_feature_imagic_inodes(sb);
1101         extent_fs = ext2fs_has_feature_extents(sb);
1102         inlinedata_fs = ext2fs_has_feature_inline_data(sb);
1103
1104         /*
1105          * Allocate bitmaps structures
1106          */
1107         pctx.errcode = e2fsck_allocate_inode_bitmap(fs, _("in-use inode map"),
1108                                                     EXT2FS_BMAP64_RBTREE,
1109                                                     "inode_used_map",
1110                                                     &ctx->inode_used_map);
1111         if (pctx.errcode) {
1112                 pctx.num = 1;
1113                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1114                 ctx->flags |= E2F_FLAG_ABORT;
1115                 return;
1116         }
1117         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1118                         _("directory inode map"),
1119                         EXT2FS_BMAP64_AUTODIR,
1120                         "inode_dir_map", &ctx->inode_dir_map);
1121         if (pctx.errcode) {
1122                 pctx.num = 2;
1123                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1124                 ctx->flags |= E2F_FLAG_ABORT;
1125                 return;
1126         }
1127         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
1128                         _("regular file inode map"), EXT2FS_BMAP64_RBTREE,
1129                         "inode_reg_map", &ctx->inode_reg_map);
1130         if (pctx.errcode) {
1131                 pctx.num = 6;
1132                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
1133                 ctx->flags |= E2F_FLAG_ABORT;
1134                 return;
1135         }
1136         pctx.errcode = e2fsck_allocate_subcluster_bitmap(fs,
1137                         _("in-use block map"), EXT2FS_BMAP64_RBTREE,
1138                         "block_found_map", &ctx->block_found_map);
1139         if (pctx.errcode) {
1140                 pctx.num = 1;
1141                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1142                 ctx->flags |= E2F_FLAG_ABORT;
1143                 return;
1144         }
1145         pctx.errcode = e2fsck_allocate_block_bitmap(fs,
1146                         _("metadata block map"), EXT2FS_BMAP64_RBTREE,
1147                         "block_metadata_map", &ctx->block_metadata_map);
1148         if (pctx.errcode) {
1149                 pctx.num = 1;
1150                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1151                 ctx->flags |= E2F_FLAG_ABORT;
1152                 return;
1153         }
1154         pctx.errcode = e2fsck_setup_icount(ctx, "inode_link_info", 0, NULL,
1155                                            &ctx->inode_link_info);
1156         if (pctx.errcode) {
1157                 fix_problem(ctx, PR_1_ALLOCATE_ICOUNT, &pctx);
1158                 ctx->flags |= E2F_FLAG_ABORT;
1159                 return;
1160         }
1161         inode = (struct ext2_inode *)
1162                 e2fsck_allocate_memory(ctx, inode_size, "scratch inode");
1163
1164         inodes_to_process = (struct process_inode_block *)
1165                 e2fsck_allocate_memory(ctx,
1166                                        (ctx->process_inode_size *
1167                                         sizeof(struct process_inode_block)),
1168                                        "array of inodes to process");
1169         process_inode_count = 0;
1170
1171         pctx.errcode = ext2fs_init_dblist(fs, 0);
1172         if (pctx.errcode) {
1173                 fix_problem(ctx, PR_1_ALLOCATE_DBCOUNT, &pctx);
1174                 ctx->flags |= E2F_FLAG_ABORT;
1175                 goto endit;
1176         }
1177
1178         /*
1179          * If the last orphan field is set, clear it, since the pass1
1180          * processing will automatically find and clear the orphans.
1181          * In the future, we may want to try using the last_orphan
1182          * linked list ourselves, but for now, we clear it so that the
1183          * ext3 mount code won't get confused.
1184          */
1185         if (!(ctx->options & E2F_OPT_READONLY)) {
1186                 if (fs->super->s_last_orphan) {
1187                         fs->super->s_last_orphan = 0;
1188                         ext2fs_mark_super_dirty(fs);
1189                 }
1190         }
1191
1192         mark_table_blocks(ctx);
1193         pctx.errcode = ext2fs_convert_subcluster_bitmap(fs,
1194                                                 &ctx->block_found_map);
1195         if (pctx.errcode) {
1196                 fix_problem(ctx, PR_1_CONVERT_SUBCLUSTER, &pctx);
1197                 ctx->flags |= E2F_FLAG_ABORT;
1198                 goto endit;
1199         }
1200         block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 3,
1201                                                     "block interate buffer");
1202         if (EXT2_INODE_SIZE(fs->super) == EXT2_GOOD_OLD_INODE_SIZE)
1203                 e2fsck_use_inode_shortcuts(ctx, 1);
1204         e2fsck_intercept_block_allocations(ctx);
1205         old_op = ehandler_operation(_("opening inode scan"));
1206         pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks,
1207                                               &scan);
1208         ehandler_operation(old_op);
1209         if (pctx.errcode) {
1210                 fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1211                 ctx->flags |= E2F_FLAG_ABORT;
1212                 goto endit;
1213         }
1214         ext2fs_inode_scan_flags(scan, EXT2_SF_SKIP_MISSING_ITABLE |
1215                                       EXT2_SF_WARN_GARBAGE_INODES, 0);
1216         ctx->stashed_inode = inode;
1217         scan_struct.ctx = ctx;
1218         scan_struct.block_buf = block_buf;
1219         ext2fs_set_inode_callback(scan, scan_callback, &scan_struct);
1220         if (ctx->progress && ((ctx->progress)(ctx, 1, 0,
1221                                               ctx->fs->group_desc_count)))
1222                 goto endit;
1223         if ((fs->super->s_wtime < fs->super->s_inodes_count) ||
1224             (fs->super->s_mtime < fs->super->s_inodes_count) ||
1225             (fs->super->s_mkfs_time &&
1226              fs->super->s_mkfs_time < fs->super->s_inodes_count))
1227                 low_dtime_check = 0;
1228
1229         if (ext2fs_has_feature_mmp(fs->super) &&
1230             fs->super->s_mmp_block > fs->super->s_first_data_block &&
1231             fs->super->s_mmp_block < ext2fs_blocks_count(fs->super))
1232                 ext2fs_mark_block_bitmap2(ctx->block_found_map,
1233                                           fs->super->s_mmp_block);
1234
1235         /* Set up ctx->lost_and_found if possible */
1236         (void) e2fsck_get_lost_and_found(ctx, 0);
1237
1238         while (1) {
1239                 if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
1240                         if (e2fsck_mmp_update(fs))
1241                                 fatal_error(ctx, 0);
1242                 }
1243                 old_op = ehandler_operation(_("getting next inode from scan"));
1244                 pctx.errcode = ext2fs_get_next_inode_full(scan, &ino,
1245                                                           inode, inode_size);
1246                 if (ino > ino_threshold)
1247                         pass1_readahead(ctx, &ra_group, &ino_threshold);
1248                 ehandler_operation(old_op);
1249                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1250                         goto endit;
1251                 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE) {
1252                         /*
1253                          * If badblocks says badblocks is bad, offer to clear
1254                          * the list, update the in-core bb list, and restart
1255                          * the inode scan.
1256                          */
1257                         if (ino == EXT2_BAD_INO &&
1258                             fix_problem(ctx, PR_1_BADBLOCKS_IN_BADBLOCKS,
1259                                         &pctx)) {
1260                                 errcode_t err;
1261
1262                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1263                                 ext2fs_badblocks_list_free(ctx->fs->badblocks);
1264                                 ctx->fs->badblocks = NULL;
1265                                 err = ext2fs_read_bb_inode(ctx->fs,
1266                                                         &ctx->fs->badblocks);
1267                                 if (err) {
1268                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1269                                                     &pctx);
1270                                         ctx->flags |= E2F_FLAG_ABORT;
1271                                         goto endit;
1272                                 }
1273                                 err = ext2fs_inode_scan_goto_blockgroup(scan,
1274                                                                         0);
1275                                 if (err) {
1276                                         fix_problem(ctx, PR_1_ISCAN_ERROR,
1277                                                     &pctx);
1278                                         ctx->flags |= E2F_FLAG_ABORT;
1279                                         goto endit;
1280                                 }
1281                                 continue;
1282                         }
1283                         if (!ctx->inode_bb_map)
1284                                 alloc_bb_map(ctx);
1285                         ext2fs_mark_inode_bitmap2(ctx->inode_bb_map, ino);
1286                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1287                         continue;
1288                 }
1289                 if (pctx.errcode &&
1290                     pctx.errcode != EXT2_ET_INODE_CSUM_INVALID &&
1291                     pctx.errcode != EXT2_ET_INODE_IS_GARBAGE) {
1292                         fix_problem(ctx, PR_1_ISCAN_ERROR, &pctx);
1293                         ctx->flags |= E2F_FLAG_ABORT;
1294                         goto endit;
1295                 }
1296                 if (!ino)
1297                         break;
1298                 pctx.ino = ino;
1299                 pctx.inode = inode;
1300                 ctx->stashed_ino = ino;
1301
1302                 /* Clear trashed inode? */
1303                 if (pctx.errcode == EXT2_ET_INODE_IS_GARBAGE &&
1304                     inode->i_links_count > 0 &&
1305                     fix_problem(ctx, PR_1_INODE_IS_GARBAGE, &pctx)) {
1306                         pctx.errcode = 0;
1307                         e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1308                 }
1309                 failed_csum = pctx.errcode != 0;
1310
1311                 if (inode->i_links_count) {
1312                         pctx.errcode = ext2fs_icount_store(ctx->inode_link_info,
1313                                            ino, inode->i_links_count);
1314                         if (pctx.errcode) {
1315                                 pctx.num = inode->i_links_count;
1316                                 fix_problem(ctx, PR_1_ICOUNT_STORE, &pctx);
1317                                 ctx->flags |= E2F_FLAG_ABORT;
1318                                 goto endit;
1319                         }
1320                 }
1321
1322                 /* Conflicting inlinedata/extents inode flags? */
1323                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) &&
1324                     (inode->i_flags & EXT4_EXTENTS_FL)) {
1325                         int res = fix_inline_data_extents_file(ctx, ino, inode,
1326                                                                inode_size,
1327                                                                &pctx);
1328                         if (res < 0) {
1329                                 /* skip FINISH_INODE_LOOP */
1330                                 continue;
1331                         }
1332                 }
1333
1334                 /* Test for incorrect inline_data flags settings. */
1335                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && !inlinedata_fs &&
1336                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1337                         size_t size = 0;
1338
1339                         pctx.errcode = ext2fs_inline_data_size(fs, ino, &size);
1340                         if (!pctx.errcode && size &&
1341                             fix_problem(ctx, PR_1_INLINE_DATA_FEATURE, &pctx)) {
1342                                 ext2fs_set_feature_inline_data(sb);
1343                                 ext2fs_mark_super_dirty(fs);
1344                                 inlinedata_fs = 1;
1345                         } else if (fix_problem(ctx, PR_1_INLINE_DATA_SET, &pctx)) {
1346                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1347                                 /* skip FINISH_INODE_LOOP */
1348                                 continue;
1349                         }
1350                 }
1351
1352                 /* Test for inline data flag but no attr */
1353                 if ((inode->i_flags & EXT4_INLINE_DATA_FL) && inlinedata_fs &&
1354                     EXT2_I_SIZE(inode) > EXT4_MIN_INLINE_DATA_SIZE &&
1355                     (ino >= EXT2_FIRST_INODE(fs->super))) {
1356                         size_t size = 0;
1357                         errcode_t err;
1358                         int flags;
1359
1360                         flags = fs->flags;
1361                         if (failed_csum)
1362                                 fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1363                         err = get_inline_data_ea_size(fs, ino, &size);
1364                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1365                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1366
1367                         switch (err) {
1368                         case 0:
1369                                 /* Everything is awesome... */
1370                                 break;
1371                         case EXT2_ET_BAD_EA_BLOCK_NUM:
1372                         case EXT2_ET_BAD_EA_HASH:
1373                         case EXT2_ET_BAD_EA_HEADER:
1374                         case EXT2_ET_EA_BAD_NAME_LEN:
1375                         case EXT2_ET_EA_BAD_VALUE_SIZE:
1376                         case EXT2_ET_EA_KEY_NOT_FOUND:
1377                         case EXT2_ET_EA_NO_SPACE:
1378                         case EXT2_ET_MISSING_EA_FEATURE:
1379                         case EXT2_ET_INLINE_DATA_CANT_ITERATE:
1380                         case EXT2_ET_INLINE_DATA_NO_BLOCK:
1381                         case EXT2_ET_INLINE_DATA_NO_SPACE:
1382                         case EXT2_ET_NO_INLINE_DATA:
1383                         case EXT2_ET_EXT_ATTR_CSUM_INVALID:
1384                         case EXT2_ET_EA_BAD_VALUE_OFFSET:
1385                                 /* broken EA or no system.data EA; truncate */
1386                                 if (fix_problem(ctx, PR_1_INLINE_DATA_NO_ATTR,
1387                                                 &pctx)) {
1388                                         err = ext2fs_inode_size_set(fs, inode,
1389                                                         sizeof(inode->i_block));
1390                                         if (err) {
1391                                                 pctx.errcode = err;
1392                                                 ctx->flags |= E2F_FLAG_ABORT;
1393                                                 goto endit;
1394                                         }
1395                                         if (LINUX_S_ISLNK(inode->i_mode))
1396                                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
1397                                         e2fsck_write_inode(ctx, ino, inode,
1398                                                            "pass1");
1399                                         failed_csum = 0;
1400                                 }
1401                                 break;
1402                         default:
1403                                 /* Some other kind of non-xattr error? */
1404                                 pctx.errcode = err;
1405                                 ctx->flags |= E2F_FLAG_ABORT;
1406                                 goto endit;
1407                         }
1408                 }
1409
1410                 /*
1411                  * Test for incorrect extent flag settings.
1412                  *
1413                  * On big-endian machines we must be careful:
1414                  * When the inode is read, the i_block array is not swapped
1415                  * if the extent flag is set.  Therefore if we are testing
1416                  * for or fixing a wrongly-set flag, we must potentially
1417                  * (un)swap before testing, or after fixing.
1418                  */
1419
1420                 /*
1421                  * In this case the extents flag was set when read, so
1422                  * extent_header_verify is ok.  If the inode is cleared,
1423                  * no need to swap... so no extra swapping here.
1424                  */
1425                 if ((inode->i_flags & EXT4_EXTENTS_FL) && !extent_fs &&
1426                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1427                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO))) {
1428                         if ((ext2fs_extent_header_verify(inode->i_block,
1429                                                  sizeof(inode->i_block)) == 0) &&
1430                             fix_problem(ctx, PR_1_EXTENT_FEATURE, &pctx)) {
1431                                 ext2fs_set_feature_extents(sb);
1432                                 ext2fs_mark_super_dirty(fs);
1433                                 extent_fs = 1;
1434                         } else if (fix_problem(ctx, PR_1_EXTENTS_SET, &pctx)) {
1435                         clear_inode:
1436                                 e2fsck_clear_inode(ctx, ino, inode, 0, "pass1");
1437                                 if (ino == EXT2_BAD_INO)
1438                                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map,
1439                                                                  ino);
1440                                 /* skip FINISH_INODE_LOOP */
1441                                 continue;
1442                         }
1443                 }
1444
1445                 /*
1446                  * For big-endian machines:
1447                  * If the inode didn't have the extents flag set when it
1448                  * was read, then the i_blocks array was swapped.  To test
1449                  * as an extents header, we must swap it back first.
1450                  * IF we then set the extents flag, the entire i_block
1451                  * array must be un/re-swapped to make it proper extents data.
1452                  */
1453                 if (extent_fs && !(inode->i_flags & EXT4_EXTENTS_FL) &&
1454                     (inode->i_links_count || (ino == EXT2_BAD_INO) ||
1455                      (ino == EXT2_ROOT_INO) || (ino == EXT2_JOURNAL_INO)) &&
1456                     (LINUX_S_ISREG(inode->i_mode) ||
1457                      LINUX_S_ISDIR(inode->i_mode))) {
1458                         void *ehp;
1459 #ifdef WORDS_BIGENDIAN
1460                         __u32 tmp_block[EXT2_N_BLOCKS];
1461
1462                         for (i = 0; i < EXT2_N_BLOCKS; i++)
1463                                 tmp_block[i] = ext2fs_swab32(inode->i_block[i]);
1464                         ehp = tmp_block;
1465 #else
1466                         ehp = inode->i_block;
1467 #endif
1468                         if ((ext2fs_extent_header_verify(ehp,
1469                                          sizeof(inode->i_block)) == 0) &&
1470                             (fix_problem(ctx, PR_1_UNSET_EXTENT_FL, &pctx))) {
1471                                 inode->i_flags |= EXT4_EXTENTS_FL;
1472 #ifdef WORDS_BIGENDIAN
1473                                 memcpy(inode->i_block, tmp_block,
1474                                        sizeof(inode->i_block));
1475 #endif
1476                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1477                                 failed_csum = 0;
1478                         }
1479                 }
1480
1481                 if (ino == EXT2_BAD_INO) {
1482                         struct process_block_struct pb;
1483
1484                         if ((failed_csum || inode->i_mode || inode->i_uid ||
1485                              inode->i_gid || inode->i_links_count ||
1486                              (inode->i_flags & EXT4_INLINE_DATA_FL) ||
1487                              inode->i_file_acl) &&
1488                             fix_problem(ctx, PR_1_INVALID_BAD_INODE, &pctx)) {
1489                                 memset(inode, 0, sizeof(struct ext2_inode));
1490                                 e2fsck_write_inode(ctx, ino, inode,
1491                                                    "clear bad inode");
1492                                 failed_csum = 0;
1493                         }
1494
1495                         pctx.errcode = ext2fs_copy_bitmap(ctx->block_found_map,
1496                                                           &pb.fs_meta_blocks);
1497                         if (pctx.errcode) {
1498                                 pctx.num = 4;
1499                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, &pctx);
1500                                 ctx->flags |= E2F_FLAG_ABORT;
1501                                 goto endit;
1502                         }
1503                         pb.ino = EXT2_BAD_INO;
1504                         pb.num_blocks = pb.last_block = 0;
1505                         pb.last_db_block = -1;
1506                         pb.num_illegal_blocks = 0;
1507                         pb.suppress = 0; pb.clear = 0; pb.is_dir = 0;
1508                         pb.is_reg = 0; pb.fragmented = 0; pb.bbcheck = 0;
1509                         pb.inode = inode;
1510                         pb.pctx = &pctx;
1511                         pb.ctx = ctx;
1512                         pctx.errcode = ext2fs_block_iterate3(fs, ino, 0,
1513                                      block_buf, process_bad_block, &pb);
1514                         ext2fs_free_block_bitmap(pb.fs_meta_blocks);
1515                         if (pctx.errcode) {
1516                                 fix_problem(ctx, PR_1_BLOCK_ITERATE, &pctx);
1517                                 ctx->flags |= E2F_FLAG_ABORT;
1518                                 goto endit;
1519                         }
1520                         if (pb.bbcheck)
1521                                 if (!fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK_PROMPT, &pctx)) {
1522                                 ctx->flags |= E2F_FLAG_ABORT;
1523                                 goto endit;
1524                         }
1525                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1526                         clear_problem_context(&pctx);
1527                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1528                         continue;
1529                 } else if (ino == EXT2_ROOT_INO) {
1530                         /*
1531                          * Make sure the root inode is a directory; if
1532                          * not, offer to clear it.  It will be
1533                          * regnerated in pass #3.
1534                          */
1535                         if (!LINUX_S_ISDIR(inode->i_mode)) {
1536                                 if (fix_problem(ctx, PR_1_ROOT_NO_DIR, &pctx))
1537                                         goto clear_inode;
1538                         }
1539                         /*
1540                          * If dtime is set, offer to clear it.  mke2fs
1541                          * version 0.2b created filesystems with the
1542                          * dtime field set for the root and lost+found
1543                          * directories.  We won't worry about
1544                          * /lost+found, since that can be regenerated
1545                          * easily.  But we will fix the root directory
1546                          * as a special case.
1547                          */
1548                         if (inode->i_dtime && inode->i_links_count) {
1549                                 if (fix_problem(ctx, PR_1_ROOT_DTIME, &pctx)) {
1550                                         inode->i_dtime = 0;
1551                                         e2fsck_write_inode(ctx, ino, inode,
1552                                                            "pass1");
1553                                         failed_csum = 0;
1554                                 }
1555                         }
1556                 } else if (ino == EXT2_JOURNAL_INO) {
1557                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1558                         if (fs->super->s_journal_inum == EXT2_JOURNAL_INO) {
1559                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1560                                     fix_problem(ctx, PR_1_JOURNAL_BAD_MODE,
1561                                                 &pctx)) {
1562                                         inode->i_mode = LINUX_S_IFREG;
1563                                         e2fsck_write_inode(ctx, ino, inode,
1564                                                            "pass1");
1565                                         failed_csum = 0;
1566                                 }
1567                                 check_blocks(ctx, &pctx, block_buf);
1568                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1569                                 continue;
1570                         }
1571                         if ((inode->i_links_count ||
1572                              inode->i_blocks || inode->i_block[0]) &&
1573                             fix_problem(ctx, PR_1_JOURNAL_INODE_NOT_CLEAR,
1574                                         &pctx)) {
1575                                 memset(inode, 0, inode_size);
1576                                 ext2fs_icount_store(ctx->inode_link_info,
1577                                                     ino, 0);
1578                                 e2fsck_write_inode_full(ctx, ino, inode,
1579                                                         inode_size, "pass1");
1580                                 failed_csum = 0;
1581                         }
1582                 } else if (quota_inum_is_reserved(fs, ino)) {
1583                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1584                         if (ext2fs_has_feature_quota(fs->super) &&
1585                             quota_inum_is_super(fs->super, ino)) {
1586                                 if (!LINUX_S_ISREG(inode->i_mode) &&
1587                                     fix_problem(ctx, PR_1_QUOTA_BAD_MODE,
1588                                                         &pctx)) {
1589                                         inode->i_mode = LINUX_S_IFREG;
1590                                         e2fsck_write_inode(ctx, ino, inode,
1591                                                         "pass1");
1592                                         failed_csum = 0;
1593                                 }
1594                                 check_blocks(ctx, &pctx, block_buf);
1595                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1596                                 continue;
1597                         }
1598                         if ((inode->i_links_count ||
1599                              inode->i_blocks || inode->i_block[0]) &&
1600                             fix_problem(ctx, PR_1_QUOTA_INODE_NOT_CLEAR,
1601                                         &pctx)) {
1602                                 memset(inode, 0, inode_size);
1603                                 ext2fs_icount_store(ctx->inode_link_info,
1604                                                     ino, 0);
1605                                 e2fsck_write_inode_full(ctx, ino, inode,
1606                                                         inode_size, "pass1");
1607                                 failed_csum = 0;
1608                         }
1609                 } else if (ino < EXT2_FIRST_INODE(fs->super)) {
1610                         problem_t problem = 0;
1611
1612                         ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1613                         if (ino == EXT2_BOOT_LOADER_INO) {
1614                                 if (LINUX_S_ISDIR(inode->i_mode))
1615                                         problem = PR_1_RESERVED_BAD_MODE;
1616                         } else if (ino == EXT2_RESIZE_INO) {
1617                                 if (inode->i_mode &&
1618                                     !LINUX_S_ISREG(inode->i_mode))
1619                                         problem = PR_1_RESERVED_BAD_MODE;
1620                         } else {
1621                                 if (inode->i_mode != 0)
1622                                         problem = PR_1_RESERVED_BAD_MODE;
1623                         }
1624                         if (problem) {
1625                                 if (fix_problem(ctx, problem, &pctx)) {
1626                                         inode->i_mode = 0;
1627                                         e2fsck_write_inode(ctx, ino, inode,
1628                                                            "pass1");
1629                                         failed_csum = 0;
1630                                 }
1631                         }
1632                         check_blocks(ctx, &pctx, block_buf);
1633                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1634                         continue;
1635                 }
1636
1637                 /*
1638                  * Check for inodes who might have been part of the
1639                  * orphaned list linked list.  They should have gotten
1640                  * dealt with by now, unless the list had somehow been
1641                  * corrupted.
1642                  *
1643                  * FIXME: In the future, inodes which are still in use
1644                  * (and which are therefore) pending truncation should
1645                  * be handled specially.  Right now we just clear the
1646                  * dtime field, and the normal e2fsck handling of
1647                  * inodes where i_size and the inode blocks are
1648                  * inconsistent is to fix i_size, instead of releasing
1649                  * the extra blocks.  This won't catch the inodes that
1650                  * was at the end of the orphan list, but it's better
1651                  * than nothing.  The right answer is that there
1652                  * shouldn't be any bugs in the orphan list handling.  :-)
1653                  */
1654                 if (inode->i_dtime && low_dtime_check &&
1655                     inode->i_dtime < ctx->fs->super->s_inodes_count) {
1656                         if (fix_problem(ctx, PR_1_LOW_DTIME, &pctx)) {
1657                                 inode->i_dtime = inode->i_links_count ?
1658                                         0 : ctx->now;
1659                                 e2fsck_write_inode(ctx, ino, inode,
1660                                                    "pass1");
1661                                 failed_csum = 0;
1662                         }
1663                 }
1664
1665                 /*
1666                  * This code assumes that deleted inodes have
1667                  * i_links_count set to 0.
1668                  */
1669                 if (!inode->i_links_count) {
1670                         if (!inode->i_dtime && inode->i_mode) {
1671                                 if (fix_problem(ctx,
1672                                             PR_1_ZERO_DTIME, &pctx)) {
1673                                         inode->i_dtime = ctx->now;
1674                                         e2fsck_write_inode(ctx, ino, inode,
1675                                                            "pass1");
1676                                         failed_csum = 0;
1677                                 }
1678                         }
1679                         FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1680                         continue;
1681                 }
1682                 /*
1683                  * n.b.  0.3c ext2fs code didn't clear i_links_count for
1684                  * deleted files.  Oops.
1685                  *
1686                  * Since all new ext2 implementations get this right,
1687                  * we now assume that the case of non-zero
1688                  * i_links_count and non-zero dtime means that we
1689                  * should keep the file, not delete it.
1690                  *
1691                  */
1692                 if (inode->i_dtime) {
1693                         if (fix_problem(ctx, PR_1_SET_DTIME, &pctx)) {
1694                                 inode->i_dtime = 0;
1695                                 e2fsck_write_inode(ctx, ino, inode, "pass1");
1696                                 failed_csum = 0;
1697                         }
1698                 }
1699
1700                 ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
1701                 switch (fs->super->s_creator_os) {
1702                     case EXT2_OS_HURD:
1703                         frag = inode->osd2.hurd2.h_i_frag;
1704                         fsize = inode->osd2.hurd2.h_i_fsize;
1705                         break;
1706                     default:
1707                         frag = fsize = 0;
1708                 }
1709
1710                 if (inode->i_faddr || frag || fsize ||
1711                     (LINUX_S_ISDIR(inode->i_mode) && inode->i_dir_acl))
1712                         mark_inode_bad(ctx, ino);
1713                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1714                     !ext2fs_has_feature_64bit(fs->super) &&
1715                     inode->osd2.linux2.l_i_file_acl_high != 0)
1716                         mark_inode_bad(ctx, ino);
1717                 if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
1718                     !ext2fs_has_feature_huge_file(fs->super) &&
1719                     (inode->osd2.linux2.l_i_blocks_hi != 0))
1720                         mark_inode_bad(ctx, ino);
1721                 if (inode->i_flags & EXT2_IMAGIC_FL) {
1722                         if (imagic_fs) {
1723                                 if (!ctx->inode_imagic_map)
1724                                         alloc_imagic_map(ctx);
1725                                 ext2fs_mark_inode_bitmap2(ctx->inode_imagic_map,
1726                                                          ino);
1727                         } else {
1728                                 if (fix_problem(ctx, PR_1_SET_IMAGIC, &pctx)) {
1729                                         inode->i_flags &= ~EXT2_IMAGIC_FL;
1730                                         e2fsck_write_inode(ctx, ino,
1731                                                            inode, "pass1");
1732                                         failed_csum = 0;
1733                                 }
1734                         }
1735                 }
1736
1737                 check_inode_extra_space(ctx, &pctx);
1738                 check_is_really_dir(ctx, &pctx, block_buf);
1739
1740                 /*
1741                  * ext2fs_inode_has_valid_blocks2 does not actually look
1742                  * at i_block[] values, so not endian-sensitive here.
1743                  */
1744                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL) &&
1745                     LINUX_S_ISLNK(inode->i_mode) &&
1746                     !ext2fs_inode_has_valid_blocks2(fs, inode) &&
1747                     fix_problem(ctx, PR_1_FAST_SYMLINK_EXTENT_FL, &pctx)) {
1748                         inode->i_flags &= ~EXT4_EXTENTS_FL;
1749                         e2fsck_write_inode(ctx, ino, inode, "pass1");
1750                         failed_csum = 0;
1751                 }
1752
1753                 if (LINUX_S_ISDIR(inode->i_mode)) {
1754                         ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
1755                         e2fsck_add_dir_info(ctx, ino, 0);
1756                         ctx->fs_directory_count++;
1757                         if (inode->i_flags & EXT4_ENCRYPT_FL)
1758                                 add_encrypted_dir(ctx, ino);
1759                 } else if (LINUX_S_ISREG (inode->i_mode)) {
1760                         ext2fs_mark_inode_bitmap2(ctx->inode_reg_map, ino);
1761                         ctx->fs_regular_count++;
1762                 } else if (LINUX_S_ISCHR (inode->i_mode) &&
1763                            e2fsck_pass1_check_device_inode(fs, inode)) {
1764                         check_extents_inlinedata(ctx, &pctx);
1765                         check_immutable(ctx, &pctx);
1766                         check_size(ctx, &pctx);
1767                         ctx->fs_chardev_count++;
1768                 } else if (LINUX_S_ISBLK (inode->i_mode) &&
1769                            e2fsck_pass1_check_device_inode(fs, inode)) {
1770                         check_extents_inlinedata(ctx, &pctx);
1771                         check_immutable(ctx, &pctx);
1772                         check_size(ctx, &pctx);
1773                         ctx->fs_blockdev_count++;
1774                 } else if (LINUX_S_ISLNK (inode->i_mode) &&
1775                            e2fsck_pass1_check_symlink(fs, ino, inode,
1776                                                       block_buf)) {
1777                         check_immutable(ctx, &pctx);
1778                         ctx->fs_symlinks_count++;
1779                         if (inode->i_flags & EXT4_INLINE_DATA_FL) {
1780                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1781                                 continue;
1782                         } else if (ext2fs_inode_data_blocks(fs, inode) == 0) {
1783                                 ctx->fs_fast_symlinks_count++;
1784                                 check_blocks(ctx, &pctx, block_buf);
1785                                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1786                                 continue;
1787                         }
1788                 }
1789                 else if (LINUX_S_ISFIFO (inode->i_mode) &&
1790                          e2fsck_pass1_check_device_inode(fs, inode)) {
1791                         check_extents_inlinedata(ctx, &pctx);
1792                         check_immutable(ctx, &pctx);
1793                         check_size(ctx, &pctx);
1794                         ctx->fs_fifo_count++;
1795                 } else if ((LINUX_S_ISSOCK (inode->i_mode)) &&
1796                            e2fsck_pass1_check_device_inode(fs, inode)) {
1797                         check_extents_inlinedata(ctx, &pctx);
1798                         check_immutable(ctx, &pctx);
1799                         check_size(ctx, &pctx);
1800                         ctx->fs_sockets_count++;
1801                 } else
1802                         mark_inode_bad(ctx, ino);
1803                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1804                     !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
1805                         if (inode->i_block[EXT2_IND_BLOCK])
1806                                 ctx->fs_ind_count++;
1807                         if (inode->i_block[EXT2_DIND_BLOCK])
1808                                 ctx->fs_dind_count++;
1809                         if (inode->i_block[EXT2_TIND_BLOCK])
1810                                 ctx->fs_tind_count++;
1811                 }
1812                 if (!(inode->i_flags & EXT4_EXTENTS_FL) &&
1813                     !(inode->i_flags & EXT4_INLINE_DATA_FL) &&
1814                     (inode->i_block[EXT2_IND_BLOCK] ||
1815                      inode->i_block[EXT2_DIND_BLOCK] ||
1816                      inode->i_block[EXT2_TIND_BLOCK] ||
1817                      ext2fs_file_acl_block(fs, inode))) {
1818                         inodes_to_process[process_inode_count].ino = ino;
1819                         inodes_to_process[process_inode_count].inode =
1820                                        *(struct ext2_inode_large *)inode;
1821                         process_inode_count++;
1822                 } else
1823                         check_blocks(ctx, &pctx, block_buf);
1824
1825                 FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
1826
1827                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1828                         goto endit;
1829
1830                 if (process_inode_count >= ctx->process_inode_size) {
1831                         process_inodes(ctx, block_buf);
1832
1833                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1834                                 goto endit;
1835                 }
1836         }
1837         process_inodes(ctx, block_buf);
1838         ext2fs_close_inode_scan(scan);
1839         scan = NULL;
1840
1841         reserve_block_for_root_repair(ctx);
1842         reserve_block_for_lnf_repair(ctx);
1843
1844         /*
1845          * If any extended attribute blocks' reference counts need to
1846          * be adjusted, either up (ctx->refcount_extra), or down
1847          * (ctx->refcount), then fix them.
1848          */
1849         if (ctx->refcount) {
1850                 adjust_extattr_refcount(ctx, ctx->refcount, block_buf, -1);
1851                 ea_refcount_free(ctx->refcount);
1852                 ctx->refcount = 0;
1853         }
1854         if (ctx->refcount_extra) {
1855                 adjust_extattr_refcount(ctx, ctx->refcount_extra,
1856                                         block_buf, +1);
1857                 ea_refcount_free(ctx->refcount_extra);
1858                 ctx->refcount_extra = 0;
1859         }
1860
1861         if (ctx->invalid_bitmaps)
1862                 handle_fs_bad_blocks(ctx);
1863
1864         /* We don't need the block_ea_map any more */
1865         if (ctx->block_ea_map) {
1866                 ext2fs_free_block_bitmap(ctx->block_ea_map);
1867                 ctx->block_ea_map = 0;
1868         }
1869
1870         if (ctx->flags & E2F_FLAG_RESIZE_INODE) {
1871                 clear_problem_context(&pctx);
1872                 pctx.errcode = ext2fs_create_resize_inode(fs);
1873                 if (pctx.errcode) {
1874                         if (!fix_problem(ctx, PR_1_RESIZE_INODE_CREATE,
1875                                          &pctx)) {
1876                                 ctx->flags |= E2F_FLAG_ABORT;
1877                                 goto endit;
1878                         }
1879                         pctx.errcode = 0;
1880                 }
1881                 if (!pctx.errcode) {
1882                         e2fsck_read_inode(ctx, EXT2_RESIZE_INO, inode,
1883                                           "recreate inode");
1884                         inode->i_mtime = ctx->now;
1885                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, inode,
1886                                            "recreate inode");
1887                 }
1888                 ctx->flags &= ~E2F_FLAG_RESIZE_INODE;
1889         }
1890
1891         if (ctx->flags & E2F_FLAG_RESTART) {
1892                 /*
1893                  * Only the master copy of the superblock and block
1894                  * group descriptors are going to be written during a
1895                  * restart, so set the superblock to be used to be the
1896                  * master superblock.
1897                  */
1898                 ctx->use_superblock = 0;
1899                 unwind_pass1(fs);
1900                 goto endit;
1901         }
1902
1903         if (ctx->block_dup_map) {
1904                 if (ctx->options & E2F_OPT_PREEN) {
1905                         clear_problem_context(&pctx);
1906                         fix_problem(ctx, PR_1_DUP_BLOCKS_PREENSTOP, &pctx);
1907                 }
1908                 e2fsck_pass1_dupblocks(ctx, block_buf);
1909         }
1910         ctx->flags |= E2F_FLAG_ALLOC_OK;
1911         ext2fs_free_mem(&inodes_to_process);
1912 endit:
1913         e2fsck_use_inode_shortcuts(ctx, 0);
1914
1915         if (scan)
1916                 ext2fs_close_inode_scan(scan);
1917         if (block_buf)
1918                 ext2fs_free_mem(&block_buf);
1919         if (inode)
1920                 ext2fs_free_mem(&inode);
1921
1922         /*
1923          * The l+f inode may have been cleared, so zap it now and
1924          * later passes will recalculate it if necessary
1925          */
1926         ctx->lost_and_found = 0;
1927
1928         if ((ctx->flags & E2F_FLAG_SIGNAL_MASK) == 0)
1929                 print_resource_track(ctx, _("Pass 1"), &rtrack, ctx->fs->io);
1930         else
1931                 ctx->invalid_bitmaps++;
1932 }
1933 #undef FINISH_INODE_LOOP
1934
1935 /*
1936  * When the inode_scan routines call this callback at the end of the
1937  * glock group, call process_inodes.
1938  */
1939 static errcode_t scan_callback(ext2_filsys fs,
1940                                ext2_inode_scan scan EXT2FS_ATTR((unused)),
1941                                dgrp_t group, void * priv_data)
1942 {
1943         struct scan_callback_struct *scan_struct;
1944         e2fsck_t ctx;
1945
1946         scan_struct = (struct scan_callback_struct *) priv_data;
1947         ctx = scan_struct->ctx;
1948
1949         process_inodes((e2fsck_t) fs->priv_data, scan_struct->block_buf);
1950
1951         if (ctx->progress)
1952                 if ((ctx->progress)(ctx, 1, group+1,
1953                                     ctx->fs->group_desc_count))
1954                         return EXT2_ET_CANCEL_REQUESTED;
1955
1956         return 0;
1957 }
1958
1959 /*
1960  * Process the inodes in the "inodes to process" list.
1961  */
1962 static void process_inodes(e2fsck_t ctx, char *block_buf)
1963 {
1964         int                     i;
1965         struct ext2_inode       *old_stashed_inode;
1966         ext2_ino_t              old_stashed_ino;
1967         const char              *old_operation;
1968         char                    buf[80];
1969         struct problem_context  pctx;
1970
1971 #if 0
1972         printf("begin process_inodes: ");
1973 #endif
1974         if (process_inode_count == 0)
1975                 return;
1976         old_operation = ehandler_operation(0);
1977         old_stashed_inode = ctx->stashed_inode;
1978         old_stashed_ino = ctx->stashed_ino;
1979         qsort(inodes_to_process, process_inode_count,
1980                       sizeof(struct process_inode_block), process_inode_cmp);
1981         clear_problem_context(&pctx);
1982         for (i=0; i < process_inode_count; i++) {
1983                 pctx.inode = ctx->stashed_inode =
1984                         (struct ext2_inode *) &inodes_to_process[i].inode;
1985                 pctx.ino = ctx->stashed_ino = inodes_to_process[i].ino;
1986
1987 #if 0
1988                 printf("%u ", pctx.ino);
1989 #endif
1990                 sprintf(buf, _("reading indirect blocks of inode %u"),
1991                         pctx.ino);
1992                 ehandler_operation(buf);
1993                 check_blocks(ctx, &pctx, block_buf);
1994                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1995                         break;
1996         }
1997         ctx->stashed_inode = old_stashed_inode;
1998         ctx->stashed_ino = old_stashed_ino;
1999         process_inode_count = 0;
2000 #if 0
2001         printf("end process inodes\n");
2002 #endif
2003         ehandler_operation(old_operation);
2004 }
2005
2006 static EXT2_QSORT_TYPE process_inode_cmp(const void *a, const void *b)
2007 {
2008         const struct process_inode_block *ib_a =
2009                 (const struct process_inode_block *) a;
2010         const struct process_inode_block *ib_b =
2011                 (const struct process_inode_block *) b;
2012         int     ret;
2013
2014         ret = (ib_a->inode.i_block[EXT2_IND_BLOCK] -
2015                ib_b->inode.i_block[EXT2_IND_BLOCK]);
2016         if (ret == 0)
2017                 /*
2018                  * We only call process_inodes() for non-extent
2019                  * inodes, so it's OK to pass NULL to
2020                  * ext2fs_file_acl_block() here.
2021                  */
2022                 ret = ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_a->inode)) -
2023                         ext2fs_file_acl_block(0, ext2fs_const_inode(&ib_b->inode));
2024         if (ret == 0)
2025                 ret = ib_a->ino - ib_b->ino;
2026         return ret;
2027 }
2028
2029 /*
2030  * Mark an inode as being bad in some what
2031  */
2032 static void mark_inode_bad(e2fsck_t ctx, ino_t ino)
2033 {
2034         struct          problem_context pctx;
2035
2036         if (!ctx->inode_bad_map) {
2037                 clear_problem_context(&pctx);
2038
2039                 pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2040                                 _("bad inode map"), EXT2FS_BMAP64_RBTREE,
2041                                 "inode_bad_map", &ctx->inode_bad_map);
2042                 if (pctx.errcode) {
2043                         pctx.num = 3;
2044                         fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2045                         /* Should never get here */
2046                         ctx->flags |= E2F_FLAG_ABORT;
2047                         return;
2048                 }
2049         }
2050         ext2fs_mark_inode_bitmap2(ctx->inode_bad_map, ino);
2051 }
2052
2053 static void add_encrypted_dir(e2fsck_t ctx, ino_t ino)
2054 {
2055         struct          problem_context pctx;
2056
2057         if (!ctx->encrypted_dirs) {
2058                 pctx.errcode = ext2fs_u32_list_create(&ctx->encrypted_dirs, 0);
2059                 if (pctx.errcode)
2060                         goto error;
2061         }
2062         pctx.errcode = ext2fs_u32_list_add(ctx->encrypted_dirs, ino);
2063         if (pctx.errcode == 0)
2064                 return;
2065 error:
2066         fix_problem(ctx, PR_1_ALLOCATE_ENCRYPTED_DIRLIST, &pctx);
2067         /* Should never get here */
2068         ctx->flags |= E2F_FLAG_ABORT;
2069 }
2070
2071 /*
2072  * This procedure will allocate the inode "bb" (badblock) map table
2073  */
2074 static void alloc_bb_map(e2fsck_t ctx)
2075 {
2076         struct          problem_context pctx;
2077
2078         clear_problem_context(&pctx);
2079         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2080                         _("inode in bad block map"), EXT2FS_BMAP64_RBTREE,
2081                         "inode_bb_map", &ctx->inode_bb_map);
2082         if (pctx.errcode) {
2083                 pctx.num = 4;
2084                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2085                 /* Should never get here */
2086                 ctx->flags |= E2F_FLAG_ABORT;
2087                 return;
2088         }
2089 }
2090
2091 /*
2092  * This procedure will allocate the inode imagic table
2093  */
2094 static void alloc_imagic_map(e2fsck_t ctx)
2095 {
2096         struct          problem_context pctx;
2097
2098         clear_problem_context(&pctx);
2099         pctx.errcode = e2fsck_allocate_inode_bitmap(ctx->fs,
2100                         _("imagic inode map"), EXT2FS_BMAP64_RBTREE,
2101                         "inode_imagic_map", &ctx->inode_imagic_map);
2102         if (pctx.errcode) {
2103                 pctx.num = 5;
2104                 fix_problem(ctx, PR_1_ALLOCATE_IBITMAP_ERROR, &pctx);
2105                 /* Should never get here */
2106                 ctx->flags |= E2F_FLAG_ABORT;
2107                 return;
2108         }
2109 }
2110
2111 /*
2112  * Marks a block as in use, setting the dup_map if it's been set
2113  * already.  Called by process_block and process_bad_block.
2114  *
2115  * WARNING: Assumes checks have already been done to make sure block
2116  * is valid.  This is true in both process_block and process_bad_block.
2117  */
2118 static _INLINE_ void mark_block_used(e2fsck_t ctx, blk64_t block)
2119 {
2120         struct          problem_context pctx;
2121
2122         clear_problem_context(&pctx);
2123
2124         if (ext2fs_fast_test_block_bitmap2(ctx->block_found_map, block)) {
2125                 if (!ctx->block_dup_map) {
2126                         pctx.errcode = e2fsck_allocate_block_bitmap(ctx->fs,
2127                                         _("multiply claimed block map"),
2128                                         EXT2FS_BMAP64_RBTREE, "block_dup_map",
2129                                         &ctx->block_dup_map);
2130                         if (pctx.errcode) {
2131                                 pctx.num = 3;
2132                                 fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR,
2133                                             &pctx);
2134                                 /* Should never get here */
2135                                 ctx->flags |= E2F_FLAG_ABORT;
2136                                 return;
2137                         }
2138                 }
2139                 ext2fs_fast_mark_block_bitmap2(ctx->block_dup_map, block);
2140         } else {
2141                 ext2fs_fast_mark_block_bitmap2(ctx->block_found_map, block);
2142         }
2143 }
2144
2145 static _INLINE_ void mark_blocks_used(e2fsck_t ctx, blk64_t block,
2146                                       unsigned int num)
2147 {
2148         if (ext2fs_test_block_bitmap_range2(ctx->block_found_map, block, num))
2149                 ext2fs_mark_block_bitmap_range2(ctx->block_found_map, block, num);
2150         else
2151                 while (num--)
2152                         mark_block_used(ctx, block++);
2153 }
2154
2155 /*
2156  * Adjust the extended attribute block's reference counts at the end
2157  * of pass 1, either by subtracting out references for EA blocks that
2158  * are still referenced in ctx->refcount, or by adding references for
2159  * EA blocks that had extra references as accounted for in
2160  * ctx->refcount_extra.
2161  */
2162 static void adjust_extattr_refcount(e2fsck_t ctx, ext2_refcount_t refcount,
2163                                     char *block_buf, int adjust_sign)
2164 {
2165         struct ext2_ext_attr_header     *header;
2166         struct problem_context          pctx;
2167         ext2_filsys                     fs = ctx->fs;
2168         blk64_t                         blk;
2169         __u32                           should_be;
2170         int                             count;
2171
2172         clear_problem_context(&pctx);
2173
2174         ea_refcount_intr_begin(refcount);
2175         while (1) {
2176                 if ((blk = ea_refcount_intr_next(refcount, &count)) == 0)
2177                         break;
2178                 pctx.blk = blk;
2179                 pctx.errcode = ext2fs_read_ext_attr3(fs, blk, block_buf,
2180                                                      pctx.ino);
2181                 if (pctx.errcode) {
2182                         fix_problem(ctx, PR_1_EXTATTR_READ_ABORT, &pctx);
2183                         return;
2184                 }
2185                 header = (struct ext2_ext_attr_header *) block_buf;
2186                 pctx.blkcount = header->h_refcount;
2187                 should_be = header->h_refcount + adjust_sign * count;
2188                 pctx.num = should_be;
2189                 if (fix_problem(ctx, PR_1_EXTATTR_REFCOUNT, &pctx)) {
2190                         header->h_refcount = should_be;
2191                         pctx.errcode = ext2fs_write_ext_attr3(fs, blk,
2192                                                              block_buf,
2193                                                              pctx.ino);
2194                         if (pctx.errcode) {
2195                                 fix_problem(ctx, PR_1_EXTATTR_WRITE_ABORT,
2196                                             &pctx);
2197                                 continue;
2198                         }
2199                 }
2200         }
2201 }
2202
2203 /*
2204  * Handle processing the extended attribute blocks
2205  */
2206 static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx,
2207                            char *block_buf)
2208 {
2209         ext2_filsys fs = ctx->fs;
2210         ext2_ino_t      ino = pctx->ino;
2211         struct ext2_inode *inode = pctx->inode;
2212         blk64_t         blk;
2213         char *          end;
2214         struct ext2_ext_attr_header *header;
2215         struct ext2_ext_attr_entry *entry;
2216         int             count;
2217         region_t        region = 0;
2218         int             failed_csum = 0;
2219
2220         blk = ext2fs_file_acl_block(fs, inode);
2221         if (blk == 0)
2222                 return 0;
2223
2224         /*
2225          * If the Extended attribute flag isn't set, then a non-zero
2226          * file acl means that the inode is corrupted.
2227          *
2228          * Or if the extended attribute block is an invalid block,
2229          * then the inode is also corrupted.
2230          */
2231         if (!ext2fs_has_feature_xattr(fs->super) ||
2232             (blk < fs->super->s_first_data_block) ||
2233             (blk >= ext2fs_blocks_count(fs->super))) {
2234                 mark_inode_bad(ctx, ino);
2235                 return 0;
2236         }
2237
2238         /* If ea bitmap hasn't been allocated, create it */
2239         if (!ctx->block_ea_map) {
2240                 pctx->errcode = e2fsck_allocate_block_bitmap(fs,
2241                                         _("ext attr block map"),
2242                                         EXT2FS_BMAP64_RBTREE, "block_ea_map",
2243                                         &ctx->block_ea_map);
2244                 if (pctx->errcode) {
2245                         pctx->num = 2;
2246                         fix_problem(ctx, PR_1_ALLOCATE_BBITMAP_ERROR, pctx);
2247                         ctx->flags |= E2F_FLAG_ABORT;
2248                         return 0;
2249                 }
2250         }
2251
2252         /* Create the EA refcount structure if necessary */
2253         if (!ctx->refcount) {
2254                 pctx->errcode = ea_refcount_create(0, &ctx->refcount);
2255                 if (pctx->errcode) {
2256                         pctx->num = 1;
2257                         fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2258                         ctx->flags |= E2F_FLAG_ABORT;
2259                         return 0;
2260                 }
2261         }
2262
2263 #if 0
2264         /* Debugging text */
2265         printf("Inode %u has EA block %u\n", ino, blk);
2266 #endif
2267
2268         /* Have we seen this EA block before? */
2269         if (ext2fs_fast_test_block_bitmap2(ctx->block_ea_map, blk)) {
2270                 if (ea_refcount_decrement(ctx->refcount, blk, 0) == 0)
2271                         return 1;
2272                 /* Ooops, this EA was referenced more than it stated */
2273                 if (!ctx->refcount_extra) {
2274                         pctx->errcode = ea_refcount_create(0,
2275                                            &ctx->refcount_extra);
2276                         if (pctx->errcode) {
2277                                 pctx->num = 2;
2278                                 fix_problem(ctx, PR_1_ALLOCATE_REFCOUNT, pctx);
2279                                 ctx->flags |= E2F_FLAG_ABORT;
2280                                 return 0;
2281                         }
2282                 }
2283                 ea_refcount_increment(ctx->refcount_extra, blk, 0);
2284                 return 1;
2285         }
2286
2287         /*
2288          * OK, we haven't seen this EA block yet.  So we need to
2289          * validate it
2290          */
2291         pctx->blk = blk;
2292         pctx->errcode = ext2fs_read_ext_attr3(fs, blk, block_buf, pctx->ino);
2293         if (pctx->errcode == EXT2_ET_EXT_ATTR_CSUM_INVALID) {
2294                 pctx->errcode = 0;
2295                 failed_csum = 1;
2296         } else if (pctx->errcode == EXT2_ET_BAD_EA_HEADER)
2297                 pctx->errcode = 0;
2298
2299         if (pctx->errcode &&
2300             fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx)) {
2301                 pctx->errcode = 0;
2302                 goto clear_extattr;
2303         }
2304         header = (struct ext2_ext_attr_header *) block_buf;
2305         pctx->blk = ext2fs_file_acl_block(fs, inode);
2306         if (((ctx->ext_attr_ver == 1) &&
2307              (header->h_magic != EXT2_EXT_ATTR_MAGIC_v1)) ||
2308             ((ctx->ext_attr_ver == 2) &&
2309              (header->h_magic != EXT2_EXT_ATTR_MAGIC))) {
2310                 if (fix_problem(ctx, PR_1_BAD_EA_BLOCK, pctx))
2311                         goto clear_extattr;
2312         }
2313
2314         if (header->h_blocks != 1) {
2315                 if (fix_problem(ctx, PR_1_EA_MULTI_BLOCK, pctx))
2316                         goto clear_extattr;
2317         }
2318
2319         if (pctx->errcode && fix_problem(ctx, PR_1_READ_EA_BLOCK, pctx))
2320                 goto clear_extattr;
2321
2322         region = region_create(0, fs->blocksize);
2323         if (!region) {
2324                 fix_problem(ctx, PR_1_EA_ALLOC_REGION_ABORT, pctx);
2325                 ctx->flags |= E2F_FLAG_ABORT;
2326                 return 0;
2327         }
2328         if (region_allocate(region, 0, sizeof(struct ext2_ext_attr_header))) {
2329                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2330                         goto clear_extattr;
2331         }
2332
2333         entry = (struct ext2_ext_attr_entry *)(header+1);
2334         end = block_buf + fs->blocksize;
2335         while ((char *)entry < end && *(__u32 *)entry) {
2336                 __u32 hash;
2337
2338                 if (region_allocate(region, (char *)entry - (char *)header,
2339                                    EXT2_EXT_ATTR_LEN(entry->e_name_len))) {
2340                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2341                                 goto clear_extattr;
2342                         break;
2343                 }
2344                 if ((ctx->ext_attr_ver == 1 &&
2345                      (entry->e_name_len == 0 || entry->e_name_index != 0)) ||
2346                     (ctx->ext_attr_ver == 2 &&
2347                      entry->e_name_index == 0)) {
2348                         if (fix_problem(ctx, PR_1_EA_BAD_NAME, pctx))
2349                                 goto clear_extattr;
2350                         break;
2351                 }
2352                 if (entry->e_value_block != 0) {
2353                         if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2354                                 goto clear_extattr;
2355                 }
2356                 if (entry->e_value_offs + entry->e_value_size > fs->blocksize) {
2357                         if (fix_problem(ctx, PR_1_EA_BAD_VALUE, pctx))
2358                                 goto clear_extattr;
2359                         break;
2360                 }
2361                 if (entry->e_value_size &&
2362                     region_allocate(region, entry->e_value_offs,
2363                                     EXT2_EXT_ATTR_SIZE(entry->e_value_size))) {
2364                         if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2365                                 goto clear_extattr;
2366                 }
2367
2368                 hash = ext2fs_ext_attr_hash_entry(entry, block_buf +
2369                                                          entry->e_value_offs);
2370
2371                 if (entry->e_hash != hash) {
2372                         pctx->num = entry->e_hash;
2373                         if (fix_problem(ctx, PR_1_ATTR_HASH, pctx))
2374                                 goto clear_extattr;
2375                         entry->e_hash = hash;
2376                 }
2377
2378                 entry = EXT2_EXT_ATTR_NEXT(entry);
2379         }
2380         if (region_allocate(region, (char *)entry - (char *)header, 4)) {
2381                 if (fix_problem(ctx, PR_1_EA_ALLOC_COLLISION, pctx))
2382                         goto clear_extattr;
2383         }
2384         region_free(region);
2385
2386         /*
2387          * We only get here if there was no other errors that were fixed.
2388          * If there was a checksum fail, ask to correct it.
2389          */
2390         if (failed_csum &&
2391             fix_problem(ctx, PR_1_EA_BLOCK_ONLY_CSUM_INVALID, pctx)) {
2392                 pctx->errcode = ext2fs_write_ext_attr3(fs, blk, block_buf,
2393                                                        pctx->ino);
2394                 if (pctx->errcode)
2395                         return 0;
2396         }
2397
2398         count = header->h_refcount - 1;
2399         if (count)
2400                 ea_refcount_store(ctx->refcount, blk, count);
2401         mark_block_used(ctx, blk);
2402         ext2fs_fast_mark_block_bitmap2(ctx->block_ea_map, blk);
2403         return 1;
2404
2405 clear_extattr:
2406         if (region)
2407                 region_free(region);
2408         ext2fs_file_acl_block_set(fs, inode, 0);
2409         e2fsck_write_inode(ctx, ino, inode, "check_ext_attr");
2410         return 0;
2411 }
2412
2413 /* Returns 1 if bad htree, 0 if OK */
2414 static int handle_htree(e2fsck_t ctx, struct problem_context *pctx,
2415                         ext2_ino_t ino, struct ext2_inode *inode,
2416                         char *block_buf)
2417 {
2418         struct ext2_dx_root_info        *root;
2419         ext2_filsys                     fs = ctx->fs;
2420         errcode_t                       retval;
2421         blk64_t                         blk;
2422
2423         if ((!LINUX_S_ISDIR(inode->i_mode) &&
2424              fix_problem(ctx, PR_1_HTREE_NODIR, pctx)) ||
2425             (!ext2fs_has_feature_dir_index(fs->super) &&
2426              fix_problem(ctx, PR_1_HTREE_SET, pctx)))
2427                 return 1;
2428
2429         pctx->errcode = ext2fs_bmap2(fs, ino, inode, 0, 0, 0, 0, &blk);
2430
2431         if ((pctx->errcode) ||
2432             (blk == 0) ||
2433             (blk < fs->super->s_first_data_block) ||
2434             (blk >= ext2fs_blocks_count(fs->super))) {
2435                 if (fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2436                         return 1;
2437                 else
2438                         return 0;
2439         }
2440
2441         retval = io_channel_read_blk64(fs->io, blk, 1, block_buf);
2442         if (retval && fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2443                 return 1;
2444
2445         /* XXX should check that beginning matches a directory */
2446         root = (struct ext2_dx_root_info *) (block_buf + 24);
2447
2448         if ((root->reserved_zero || root->info_length < 8) &&
2449             fix_problem(ctx, PR_1_HTREE_BADROOT, pctx))
2450                 return 1;
2451
2452         pctx->num = root->hash_version;
2453         if ((root->hash_version != EXT2_HASH_LEGACY) &&
2454             (root->hash_version != EXT2_HASH_HALF_MD4) &&
2455             (root->hash_version != EXT2_HASH_TEA) &&
2456             fix_problem(ctx, PR_1_HTREE_HASHV, pctx))
2457                 return 1;
2458
2459         if ((root->unused_flags & EXT2_HASH_FLAG_INCOMPAT) &&
2460             fix_problem(ctx, PR_1_HTREE_INCOMPAT, pctx))
2461                 return 1;
2462
2463         pctx->num = root->indirect_levels;
2464         if ((root->indirect_levels > 1) &&
2465             fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
2466                 return 1;
2467
2468         return 0;
2469 }
2470
2471 void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino,
2472                         struct ext2_inode *inode, int restart_flag,
2473                         const char *source)
2474 {
2475         inode->i_flags = 0;
2476         inode->i_links_count = 0;
2477         ext2fs_icount_store(ctx->inode_link_info, ino, 0);
2478         inode->i_dtime = ctx->now;
2479
2480         /*
2481          * If a special inode has such rotten block mappings that we
2482          * want to clear the whole inode, be sure to actually zap
2483          * the block maps because i_links_count isn't checked for
2484          * special inodes, and we'll end up right back here the next
2485          * time we run fsck.
2486          */
2487         if (ino < EXT2_FIRST_INODE(ctx->fs->super))
2488                 memset(inode->i_block, 0, sizeof(inode->i_block));
2489
2490         ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
2491         ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
2492         if (ctx->inode_reg_map)
2493                 ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
2494         if (ctx->inode_bad_map)
2495                 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
2496
2497         /*
2498          * If the inode was partially accounted for before processing
2499          * was aborted, we need to restart the pass 1 scan.
2500          */
2501         ctx->flags |= restart_flag;
2502
2503         if (ino == EXT2_BAD_INO)
2504                 memset(inode, 0, sizeof(struct ext2_inode));
2505
2506         e2fsck_write_inode(ctx, ino, inode, source);
2507 }
2508
2509 /*
2510  * Use the multiple-blocks reclamation code to fix alignment problems in
2511  * a bigalloc filesystem.  We want a logical cluster to map to *only* one
2512  * physical cluster, and we want the block offsets within that cluster to
2513  * line up.
2514  */
2515 static int has_unaligned_cluster_map(e2fsck_t ctx,
2516                                      blk64_t last_pblk, blk64_t last_lblk,
2517                                      blk64_t pblk, blk64_t lblk)
2518 {
2519         blk64_t cluster_mask;
2520
2521         if (!ctx->fs->cluster_ratio_bits)
2522                 return 0;
2523         cluster_mask = EXT2FS_CLUSTER_MASK(ctx->fs);
2524
2525         /*
2526          * If the block in the logical cluster doesn't align with the block in
2527          * the physical cluster...
2528          */
2529         if ((lblk & cluster_mask) != (pblk & cluster_mask))
2530                 return 1;
2531
2532         /*
2533          * If we cross a physical cluster boundary within a logical cluster...
2534          */
2535         if (last_pblk && (lblk & cluster_mask) != 0 &&
2536             EXT2FS_B2C(ctx->fs, lblk) == EXT2FS_B2C(ctx->fs, last_lblk) &&
2537             EXT2FS_B2C(ctx->fs, pblk) != EXT2FS_B2C(ctx->fs, last_pblk))
2538                 return 1;
2539
2540         return 0;
2541 }
2542
2543 static void scan_extent_node(e2fsck_t ctx, struct problem_context *pctx,
2544                              struct process_block_struct *pb,
2545                              blk64_t start_block, blk64_t end_block,
2546                              blk64_t eof_block,
2547                              ext2_extent_handle_t ehandle,
2548                              int try_repairs)
2549 {
2550         struct ext2fs_extent    extent;
2551         blk64_t                 blk, last_lblk;
2552         e2_blkcnt_t             blockcnt;
2553         unsigned int            i;
2554         int                     is_dir, is_leaf;
2555         problem_t               problem;
2556         struct ext2_extent_info info;
2557         int                     failed_csum = 0;
2558
2559         if (pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID)
2560                 failed_csum = 1;
2561
2562         pctx->errcode = ext2fs_extent_get_info(ehandle, &info);
2563         if (pctx->errcode)
2564                 return;
2565         if (!(ctx->options & E2F_OPT_FIXES_ONLY) &&
2566             !pb->eti.force_rebuild) {
2567                 struct extent_tree_level *etl;
2568
2569                 etl = pb->eti.ext_info + info.curr_level;
2570                 etl->num_extents += info.num_entries;
2571                 etl->max_extents += info.max_entries;
2572                 /*
2573                  * Implementation wart: Splitting extent blocks when appending
2574                  * will leave the old block with one free entry.  Therefore
2575                  * unless the node is totally full, pretend that a non-root
2576                  * extent block can hold one fewer entry than it actually does,
2577                  * so that we don't repeatedly rebuild the extent tree.
2578                  */
2579                 if (info.curr_level && info.num_entries < info.max_entries)
2580                         etl->max_extents--;
2581         }
2582
2583         pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_FIRST_SIB,
2584                                           &extent);
2585         while ((pctx->errcode == 0 ||
2586                 pctx->errcode == EXT2_ET_EXTENT_CSUM_INVALID) &&
2587                info.num_entries-- > 0) {
2588                 is_leaf = extent.e_flags & EXT2_EXTENT_FLAGS_LEAF;
2589                 is_dir = LINUX_S_ISDIR(pctx->inode->i_mode);
2590                 last_lblk = extent.e_lblk + extent.e_len - 1;
2591
2592                 problem = 0;
2593                 pctx->blk = extent.e_pblk;
2594                 pctx->blk2 = extent.e_lblk;
2595                 pctx->num = extent.e_len;
2596                 pctx->blkcount = extent.e_lblk + extent.e_len;
2597
2598                 if (extent.e_pblk == 0 ||
2599                     extent.e_pblk < ctx->fs->super->s_first_data_block ||
2600                     extent.e_pblk >= ext2fs_blocks_count(ctx->fs->super))
2601                         problem = PR_1_EXTENT_BAD_START_BLK;
2602                 else if (extent.e_lblk < start_block)
2603                         problem = PR_1_OUT_OF_ORDER_EXTENTS;
2604                 else if ((end_block && last_lblk > end_block) &&
2605                          (!(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT &&
2606                                 last_lblk > eof_block)))
2607                         problem = PR_1_EXTENT_END_OUT_OF_BOUNDS;
2608                 else if (is_leaf && extent.e_len == 0)
2609                         problem = PR_1_EXTENT_LENGTH_ZERO;
2610                 else if (is_leaf &&
2611                          (extent.e_pblk + extent.e_len) >
2612                          ext2fs_blocks_count(ctx->fs->super))
2613                         problem = PR_1_EXTENT_ENDS_BEYOND;
2614                 else if (is_leaf && is_dir &&
2615                          ((extent.e_lblk + extent.e_len) >
2616                           (1U << (21 - ctx->fs->super->s_log_block_size))))
2617                         problem = PR_1_TOOBIG_DIR;
2618
2619                 if (is_leaf && problem == 0 && extent.e_len > 0 &&
2620                     region_allocate(pb->region, extent.e_lblk, extent.e_len))
2621                         problem = PR_1_EXTENT_COLLISION;
2622
2623                 /*
2624                  * Uninitialized blocks in a directory?  Clear the flag and
2625                  * we'll interpret the blocks later.
2626                  */
2627                 if (try_repairs && is_dir && problem == 0 &&
2628                     (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT) &&
2629                     fix_problem(ctx, PR_1_UNINIT_DBLOCK, pctx)) {
2630                         extent.e_flags &= ~EXT2_EXTENT_FLAGS_UNINIT;
2631                         pb->inode_modified = 1;
2632                         pctx->errcode = ext2fs_extent_replace(ehandle, 0,
2633                                                               &extent);
2634                         if (pctx->errcode)
2635                                 return;
2636                         failed_csum = 0;
2637                 }
2638
2639                 if (try_repairs && problem) {
2640 report_problem:
2641                         if (fix_problem(ctx, problem, pctx)) {
2642                                 if (ctx->invalid_bitmaps) {
2643                                         /*
2644                                          * If fsck knows the bitmaps are bad,
2645                                          * skip to the next extent and
2646                                          * try to clear this extent again
2647                                          * after fixing the bitmaps, by
2648                                          * restarting fsck.
2649                                          */
2650                                         pctx->errcode = ext2fs_extent_get(
2651                                                           ehandle,
2652                                                           EXT2_EXTENT_NEXT_SIB,
2653                                                           &extent);
2654                                         ctx->flags |= E2F_FLAG_RESTART_LATER;
2655                                         if (pctx->errcode ==
2656                                                     EXT2_ET_NO_CURRENT_NODE) {
2657                                                 pctx->errcode = 0;
2658                                                 break;
2659                                         }
2660                                         continue;
2661                                 }
2662                                 e2fsck_read_bitmaps(ctx);
2663                                 pb->inode_modified = 1;
2664                                 pctx->errcode =
2665                                         ext2fs_extent_delete(ehandle, 0);
2666                                 if (pctx->errcode) {
2667                                         pctx->str = "ext2fs_extent_delete";
2668                                         return;
2669                                 }
2670                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
2671                                 if (pctx->errcode &&
2672                                     pctx->errcode != EXT2_ET_NO_CURRENT_NODE) {
2673                                         pctx->str = "ext2fs_extent_fix_parents";
2674                                         return;
2675                                 }
2676                                 pctx->errcode = ext2fs_extent_get(ehandle,
2677                                                                   EXT2_EXTENT_CURRENT,
2678                                                                   &extent);
2679                                 if (pctx->errcode == EXT2_ET_NO_CURRENT_NODE) {
2680                                         pctx->errcode = 0;
2681                                         break;
2682                                 }
2683                                 failed_csum = 0;
2684                                 continue;
2685                         }
2686                         goto next;
2687                 }
2688
2689                 if (!is_leaf) {
2690                         blk64_t lblk = extent.e_lblk;
2691                         int next_try_repairs = 1;
2692
2693                         blk = extent.e_pblk;
2694
2695                         /*
2696                          * If this lower extent block collides with critical
2697                          * metadata, don't try to repair the damage.  Pass 1b
2698                          * will reallocate the block; then we can try again.
2699                          */
2700                         if (pb->ino != EXT2_RESIZE_INO &&
2701                             ext2fs_test_block_bitmap2(ctx->block_metadata_map,
2702                                                       extent.e_pblk)) {
2703                                 next_try_repairs = 0;
2704                                 pctx->blk = blk;
2705                                 fix_problem(ctx,
2706                                             PR_1_CRITICAL_METADATA_COLLISION,
2707                                             pctx);
2708                                 ctx->flags |= E2F_FLAG_RESTART_LATER;
2709                         }
2710                         pctx->errcode = ext2fs_extent_get(ehandle,
2711                                                   EXT2_EXTENT_DOWN, &extent);
2712                         if (pctx->errcode &&
2713                             pctx->errcode != EXT2_ET_EXTENT_CSUM_INVALID) {
2714                                 pctx->str = "EXT2_EXTENT_DOWN";
2715                                 problem = PR_1_EXTENT_HEADER_INVALID;
2716                                 if (!next_try_repairs)
2717                                         return;
2718                                 if (pctx->errcode == EXT2_ET_EXTENT_HEADER_BAD)
2719                                         goto report_problem;
2720                                 return;
2721                         }
2722                         /* The next extent should match this index's logical start */
2723                         if (extent.e_lblk != lblk) {
2724                                 struct ext2_extent_info e_info;
2725
2726                                 ext2fs_extent_get_info(ehandle, &e_info);
2727                                 pctx->blk = lblk;
2728                                 pctx->blk2 = extent.e_lblk;
2729                                 pctx->num = e_info.curr_level - 1;
2730                                 problem = PR_1_EXTENT_INDEX_START_INVALID;
2731                                 if (fix_problem(ctx, problem, pctx)) {
2732                                         pb->inode_modified = 1;
2733                                         pctx->errcode =
2734                                                 ext2fs_extent_fix_parents(ehandle);
2735                                         if (pctx->errcode) {
2736                                                 pctx->str = "ext2fs_extent_fix_parents";
2737                                                 return;
2738                                         }
2739                                 }
2740                         }
2741                         scan_extent_node(ctx, pctx, pb, extent.e_lblk,
2742                                          last_lblk, eof_block, ehandle,
2743                                          next_try_repairs);
2744                         if (pctx->errcode)
2745                                 return;
2746                         pctx->errcode = ext2fs_extent_get(ehandle,
2747                                                   EXT2_EXTENT_UP, &extent);
2748                         if (pctx->errcode) {
2749                                 pctx->str = "EXT2_EXTENT_UP";
2750                                 return;
2751                         }
2752                         mark_block_used(ctx, blk);
2753                         pb->num_blocks++;
2754                         goto next;
2755                 }
2756
2757                 if ((pb->previous_block != 0) &&
2758                     (pb->previous_block+1 != extent.e_pblk)) {
2759                         if (ctx->options & E2F_OPT_FRAGCHECK) {
2760                                 char type = '?';
2761
2762                                 if (pb->is_dir)
2763                                         type = 'd';
2764                                 else if (pb->is_reg)
2765                                         type = 'f';
2766
2767                                 printf(("%6lu(%c): expecting %6lu "
2768                                         "actual extent "
2769                                         "phys %6lu log %lu len %lu\n"),
2770                                        (unsigned long) pctx->ino, type,
2771                                        (unsigned long) pb->previous_block+1,
2772                                        (unsigned long) extent.e_pblk,
2773                                        (unsigned long) extent.e_lblk,
2774                                        (unsigned long) extent.e_len);
2775                         }
2776                         pb->fragmented = 1;
2777                 }
2778                 /*
2779                  * If we notice a gap in the logical block mappings of an
2780                  * extent-mapped directory, offer to close the hole by
2781                  * moving the logical block down, otherwise we'll go mad in
2782                  * pass 3 allocating empty directory blocks to fill the hole.
2783                  */
2784                 if (try_repairs && is_dir &&
2785                     pb->last_block + 1 < extent.e_lblk) {
2786                         blk64_t new_lblk;
2787
2788                         new_lblk = pb->last_block + 1;
2789                         if (EXT2FS_CLUSTER_RATIO(ctx->fs) > 1)
2790                                 new_lblk = ((new_lblk +
2791                                              EXT2FS_CLUSTER_RATIO(ctx->fs) - 1) &
2792                                             ~EXT2FS_CLUSTER_MASK(ctx->fs)) |
2793                                            (extent.e_pblk &
2794                                             EXT2FS_CLUSTER_MASK(ctx->fs));
2795                         pctx->blk = extent.e_lblk;
2796                         pctx->blk2 = new_lblk;
2797                         if (fix_problem(ctx, PR_1_COLLAPSE_DBLOCK, pctx)) {
2798                                 extent.e_lblk = new_lblk;
2799                                 pb->inode_modified = 1;
2800                                 pctx->errcode = ext2fs_extent_replace(ehandle,
2801                                                                 0, &extent);
2802                                 if (pctx->errcode) {
2803                                         pctx->errcode = 0;
2804                                         goto alloc_later;
2805                                 }
2806                                 pctx->errcode = ext2fs_extent_fix_parents(ehandle);
2807                                 if (pctx->errcode)
2808                                         goto failed_add_dir_block;
2809                                 pctx->errcode = ext2fs_extent_goto(ehandle,
2810                                                                 extent.e_lblk);
2811                                 if (pctx->errcode)
2812                                         goto failed_add_dir_block;
2813                                 last_lblk = extent.e_lblk + extent.e_len - 1;
2814                                 failed_csum = 0;
2815                         }
2816                 }
2817 alloc_later:
2818                 while (is_dir && (++pb->last_db_block <
2819                                   (e2_blkcnt_t) extent.e_lblk)) {
2820                         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist,
2821                                                               pb->ino, 0,
2822                                                               pb->last_db_block);
2823                         if (pctx->errcode) {
2824                                 pctx->blk = 0;
2825                                 pctx->num = pb->last_db_block;
2826                                 goto failed_add_dir_block;
2827                         }
2828                 }
2829                 if (!ctx->fs->cluster_ratio_bits) {
2830                         mark_blocks_used(ctx, extent.e_pblk, extent.e_len);
2831                         pb->num_blocks += extent.e_len;
2832                 }
2833                 for (blk = extent.e_pblk, blockcnt = extent.e_lblk, i = 0;
2834                      i < extent.e_len;
2835                      blk++, blockcnt++, i++) {
2836                         if (ctx->fs->cluster_ratio_bits &&
2837                             !(pb->previous_block &&
2838                               (EXT2FS_B2C(ctx->fs, blk) ==
2839                                EXT2FS_B2C(ctx->fs, pb->previous_block)) &&
2840                               (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
2841                               ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
2842                                 mark_block_used(ctx, blk);
2843                                 pb->num_blocks++;
2844                         }
2845                         if (has_unaligned_cluster_map(ctx, pb->previous_block,
2846                                                       pb->last_block, blk,
2847                                                       blockcnt)) {
2848                                 pctx->blk = blockcnt;
2849                                 pctx->blk2 = blk;
2850                                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
2851                                 mark_block_used(ctx, blk);
2852                                 mark_block_used(ctx, blk);
2853                         }
2854                         pb->last_block = blockcnt;
2855                         pb->previous_block = blk;
2856
2857                         if (is_dir) {
2858                                 pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pctx->ino, blk, blockcnt);
2859                                 if (pctx->errcode) {
2860                                         pctx->blk = blk;
2861                                         pctx->num = blockcnt;
2862                                 failed_add_dir_block:
2863                                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
2864                                         /* Should never get here */
2865                                         ctx->flags |= E2F_FLAG_ABORT;
2866                                         return;
2867                                 }
2868                         }
2869                 }
2870                 if (is_dir && extent.e_len > 0)
2871                         pb->last_db_block = blockcnt - 1;
2872                 pb->previous_block = extent.e_pblk + extent.e_len - 1;
2873                 start_block = pb->last_block = last_lblk;
2874                 if (is_leaf && !is_dir &&
2875                     !(extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT))
2876                         pb->last_init_lblock = last_lblk;
2877         next:
2878                 pctx->errcode = ext2fs_extent_get(ehandle,
2879                                                   EXT2_EXTENT_NEXT_SIB,
2880                                                   &extent);
2881         }
2882
2883         /* Failed csum but passes checks?  Ask to fix checksum. */
2884         if (failed_csum &&
2885             fix_problem(ctx, PR_1_EXTENT_ONLY_CSUM_INVALID, pctx)) {
2886                 pb->inode_modified = 1;
2887                 pctx->errcode = ext2fs_extent_replace(ehandle, 0, &extent);
2888                 if (pctx->errcode)
2889                         return;
2890         }
2891
2892         if (pctx->errcode == EXT2_ET_EXTENT_NO_NEXT)
2893                 pctx->errcode = 0;
2894 }
2895
2896 static void check_blocks_extents(e2fsck_t ctx, struct problem_context *pctx,
2897                                  struct process_block_struct *pb)
2898 {
2899         struct ext2_extent_info info;
2900         struct ext2_inode       *inode = pctx->inode;
2901         ext2_extent_handle_t    ehandle;
2902         ext2_filsys             fs = ctx->fs;
2903         ext2_ino_t              ino = pctx->ino;
2904         errcode_t               retval;
2905         blk64_t                 eof_lblk;
2906         struct ext3_extent_header       *eh;
2907
2908         /* Check for a proper extent header... */
2909         eh = (struct ext3_extent_header *) &inode->i_block[0];
2910         retval = ext2fs_extent_header_verify(eh, sizeof(inode->i_block));
2911         if (retval) {
2912                 if (fix_problem(ctx, PR_1_MISSING_EXTENT_HEADER, pctx))
2913                         e2fsck_clear_inode(ctx, ino, inode, 0,
2914                                            "check_blocks_extents");
2915                 pctx->errcode = 0;
2916                 return;
2917         }
2918
2919         /* ...since this function doesn't fail if i_block is zeroed. */
2920         pctx->errcode = ext2fs_extent_open2(fs, ino, inode, &ehandle);
2921         if (pctx->errcode) {
2922                 if (fix_problem(ctx, PR_1_READ_EXTENT, pctx))
2923                         e2fsck_clear_inode(ctx, ino, inode, 0,
2924                                            "check_blocks_extents");
2925                 pctx->errcode = 0;
2926                 return;
2927         }
2928
2929         retval = ext2fs_extent_get_info(ehandle, &info);
2930         if (retval == 0) {
2931                 int max_depth = info.max_depth;
2932
2933                 if (max_depth >= MAX_EXTENT_DEPTH_COUNT)
2934                         max_depth = MAX_EXTENT_DEPTH_COUNT-1;
2935                 ctx->extent_depth_count[max_depth]++;
2936         }
2937
2938         /* Check maximum extent depth */
2939         pctx->blk = info.max_depth;
2940         pctx->blk2 = ext2fs_max_extent_depth(ehandle);
2941         if (pctx->blk2 < pctx->blk &&
2942             fix_problem(ctx, PR_1_EXTENT_BAD_MAX_DEPTH, pctx))
2943                 pb->eti.force_rebuild = 1;
2944
2945         /* Can we collect extent tree level stats? */
2946         pctx->blk = MAX_EXTENT_DEPTH_COUNT;
2947         if (pctx->blk2 > pctx->blk)
2948                 fix_problem(ctx, PR_1E_MAX_EXTENT_TREE_DEPTH, pctx);
2949         memset(pb->eti.ext_info, 0, sizeof(pb->eti.ext_info));
2950         pb->eti.ino = pb->ino;
2951
2952         pb->region = region_create(0, info.max_lblk);
2953         if (!pb->region) {
2954                 ext2fs_extent_free(ehandle);
2955                 fix_problem(ctx, PR_1_EXTENT_ALLOC_REGION_ABORT, pctx);
2956                 ctx->flags |= E2F_FLAG_ABORT;
2957                 return;
2958         }
2959
2960         eof_lblk = ((EXT2_I_SIZE(inode) + fs->blocksize - 1) >>
2961                 EXT2_BLOCK_SIZE_BITS(fs->super)) - 1;
2962         scan_extent_node(ctx, pctx, pb, 0, 0, eof_lblk, ehandle, 1);
2963         if (pctx->errcode &&
2964             fix_problem(ctx, PR_1_EXTENT_ITERATE_FAILURE, pctx)) {
2965                 pb->num_blocks = 0;
2966                 inode->i_blocks = 0;
2967                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
2968                                    "check_blocks_extents");
2969                 pctx->errcode = 0;
2970         }
2971         region_free(pb->region);
2972         pb->region = NULL;
2973         ext2fs_extent_free(ehandle);
2974
2975         /* Rebuild unless it's a dir and we're rehashing it */
2976         if (LINUX_S_ISDIR(inode->i_mode) &&
2977             e2fsck_dir_will_be_rehashed(ctx, ino))
2978                 return;
2979
2980         if (ctx->options & E2F_OPT_CONVERT_BMAP)
2981                 e2fsck_rebuild_extents_later(ctx, ino);
2982         else
2983                 e2fsck_should_rebuild_extents(ctx, pctx, &pb->eti, &info);
2984 }
2985
2986 /*
2987  * In fact we don't need to check blocks for an inode with inline data
2988  * because this inode doesn't have any blocks.  In this function all
2989  * we need to do is add this inode into dblist when it is a directory.
2990  */
2991 static void check_blocks_inline_data(e2fsck_t ctx, struct problem_context *pctx,
2992                                      struct process_block_struct *pb)
2993 {
2994         int     flags;
2995         size_t  inline_data_size = 0;
2996
2997         if (!pb->is_dir) {
2998                 pctx->errcode = 0;
2999                 return;
3000         }
3001
3002         /* Process the dirents in i_block[] as the "first" block. */
3003         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 0);
3004         if (pctx->errcode)
3005                 goto err;
3006
3007         /* Process the dirents in the EA as a "second" block. */
3008         flags = ctx->fs->flags;
3009         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3010         pctx->errcode = ext2fs_inline_data_size(ctx->fs, pb->ino,
3011                                                 &inline_data_size);
3012         ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3013                          (ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3014         if (pctx->errcode) {
3015                 pctx->errcode = 0;
3016                 return;
3017         }
3018
3019         if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE)
3020                 return;
3021
3022         pctx->errcode = ext2fs_add_dir_block2(ctx->fs->dblist, pb->ino, 0, 1);
3023         if (pctx->errcode)
3024                 goto err;
3025
3026         return;
3027 err:
3028         pctx->blk = 0;
3029         pctx->num = 0;
3030         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3031         ctx->flags |= E2F_FLAG_ABORT;
3032 }
3033
3034 /*
3035  * This subroutine is called on each inode to account for all of the
3036  * blocks used by that inode.
3037  */
3038 static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
3039                          char *block_buf)
3040 {
3041         ext2_filsys fs = ctx->fs;
3042         struct process_block_struct pb;
3043         ext2_ino_t      ino = pctx->ino;
3044         struct ext2_inode *inode = pctx->inode;
3045         unsigned        bad_size = 0;
3046         int             dirty_inode = 0;
3047         int             extent_fs;
3048         int             inlinedata_fs;
3049         __u64           size;
3050
3051         pb.ino = ino;
3052         pb.num_blocks = 0;
3053         pb.last_block = ~0;
3054         pb.last_init_lblock = -1;
3055         pb.last_db_block = -1;
3056         pb.num_illegal_blocks = 0;
3057         pb.suppress = 0; pb.clear = 0;
3058         pb.fragmented = 0;
3059         pb.compressed = 0;
3060         pb.previous_block = 0;
3061         pb.is_dir = LINUX_S_ISDIR(inode->i_mode);
3062         pb.is_reg = LINUX_S_ISREG(inode->i_mode);
3063         pb.max_blocks = 1 << (31 - fs->super->s_log_block_size);
3064         pb.inode = inode;
3065         pb.pctx = pctx;
3066         pb.ctx = ctx;
3067         pb.inode_modified = 0;
3068         pb.eti.force_rebuild = 0;
3069         pctx->ino = ino;
3070         pctx->errcode = 0;
3071
3072         extent_fs = ext2fs_has_feature_extents(ctx->fs->super);
3073         inlinedata_fs = ext2fs_has_feature_inline_data(ctx->fs->super);
3074
3075         if (check_ext_attr(ctx, pctx, block_buf)) {
3076                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3077                         goto out;
3078                 pb.num_blocks++;
3079         }
3080
3081         if (inlinedata_fs && (inode->i_flags & EXT4_INLINE_DATA_FL))
3082                 check_blocks_inline_data(ctx, pctx, &pb);
3083         else if (ext2fs_inode_has_valid_blocks2(fs, inode)) {
3084                 if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL))
3085                         check_blocks_extents(ctx, pctx, &pb);
3086                 else {
3087                         int flags;
3088                         /*
3089                          * If we've modified the inode, write it out before
3090                          * iterate() tries to use it.
3091                          */
3092                         if (dirty_inode) {
3093                                 e2fsck_write_inode(ctx, ino, inode,
3094                                                    "check_blocks");
3095                                 dirty_inode = 0;
3096                         }
3097                         flags = fs->flags;
3098                         fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3099                         pctx->errcode = ext2fs_block_iterate3(fs, ino,
3100                                                 pb.is_dir ? BLOCK_FLAG_HOLE : 0,
3101                                                 block_buf, process_block, &pb);
3102                         /*
3103                          * We do not have uninitialized extents in non extent
3104                          * files.
3105                          */
3106                         pb.last_init_lblock = pb.last_block;
3107                         /*
3108                          * If iterate() changed a block mapping, we have to
3109                          * re-read the inode.  If we decide to clear the
3110                          * inode after clearing some stuff, we'll re-write the
3111                          * bad mappings into the inode!
3112                          */
3113                         if (pb.inode_modified)
3114                                 e2fsck_read_inode(ctx, ino, inode,
3115                                                   "check_blocks");
3116                         fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3117                                     (fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3118
3119                         if (ctx->options & E2F_OPT_CONVERT_BMAP) {
3120 #ifdef DEBUG
3121                                 printf("bmap rebuild ino=%d\n", ino);
3122 #endif
3123                                 if (!LINUX_S_ISDIR(inode->i_mode) ||
3124                                     !e2fsck_dir_will_be_rehashed(ctx, ino))
3125                                         e2fsck_rebuild_extents_later(ctx, ino);
3126                         }
3127                 }
3128         }
3129         end_problem_latch(ctx, PR_LATCH_BLOCK);
3130         end_problem_latch(ctx, PR_LATCH_TOOBIG);
3131         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3132                 goto out;
3133         if (pctx->errcode)
3134                 fix_problem(ctx, PR_1_BLOCK_ITERATE, pctx);
3135
3136         if (pb.fragmented && pb.num_blocks < fs->super->s_blocks_per_group) {
3137                 if (LINUX_S_ISDIR(inode->i_mode))
3138                         ctx->fs_fragmented_dir++;
3139                 else
3140                         ctx->fs_fragmented++;
3141         }
3142
3143         if (pb.clear) {
3144                 e2fsck_clear_inode(ctx, ino, inode, E2F_FLAG_RESTART,
3145                                    "check_blocks");
3146                 return;
3147         }
3148
3149         if (inode->i_flags & EXT2_INDEX_FL) {
3150                 if (handle_htree(ctx, pctx, ino, inode, block_buf)) {
3151                         inode->i_flags &= ~EXT2_INDEX_FL;
3152                         dirty_inode++;
3153                 } else {
3154                         e2fsck_add_dx_dir(ctx, ino, pb.last_block+1);
3155                 }
3156         }
3157
3158         if (!pb.num_blocks && pb.is_dir &&
3159             !(inode->i_flags & EXT4_INLINE_DATA_FL)) {
3160                 if (fix_problem(ctx, PR_1_ZERO_LENGTH_DIR, pctx)) {
3161                         e2fsck_clear_inode(ctx, ino, inode, 0, "check_blocks");
3162                         ctx->fs_directory_count--;
3163                         return;
3164                 }
3165         }
3166
3167         if (ino != quota_type2inum(PRJQUOTA, fs->super) &&
3168             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INODE(ctx->fs->super))) {
3169                 quota_data_add(ctx->qctx, (struct ext2_inode_large *) inode,
3170                                ino, pb.num_blocks * fs->blocksize);
3171                 quota_data_inodes(ctx->qctx, (struct ext2_inode_large *) inode,
3172                                   ino, +1);
3173         }
3174
3175         if (!ext2fs_has_feature_huge_file(fs->super) ||
3176             !(inode->i_flags & EXT4_HUGE_FILE_FL))
3177                 pb.num_blocks *= (fs->blocksize / 512);
3178         pb.num_blocks *= EXT2FS_CLUSTER_RATIO(fs);
3179 #if 0
3180         printf("inode %u, i_size = %u, last_block = %llu, i_blocks=%llu, num_blocks = %llu\n",
3181                ino, inode->i_size, pb.last_block, ext2fs_inode_i_blocks(fs, inode),
3182                pb.num_blocks);
3183 #endif
3184         if (pb.is_dir) {
3185                 unsigned nblock = inode->i_size >> EXT2_BLOCK_SIZE_BITS(fs->super);
3186                 if (inode->i_flags & EXT4_INLINE_DATA_FL) {
3187                         int flags;
3188                         size_t sz = 0;
3189                         errcode_t err;
3190
3191                         flags = ctx->fs->flags;
3192                         ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
3193                         err = ext2fs_inline_data_size(ctx->fs, pctx->ino,
3194                                                       &sz);
3195                         ctx->fs->flags = (flags &
3196                                           EXT2_FLAG_IGNORE_CSUM_ERRORS) |
3197                                          (ctx->fs->flags &
3198                                           ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
3199                         if (err || sz != inode->i_size) {
3200                                 bad_size = 7;
3201                                 pctx->num = sz;
3202                         }
3203                 } else if (inode->i_size & (fs->blocksize - 1))
3204                         bad_size = 5;
3205                 else if (nblock > (pb.last_block + 1))
3206                         bad_size = 1;
3207                 else if (nblock < (pb.last_block + 1)) {
3208                         if (((pb.last_block + 1) - nblock) >
3209                             fs->super->s_prealloc_dir_blocks)
3210                                 bad_size = 2;
3211                 }
3212         } else {
3213                 e2_blkcnt_t blkpg = ctx->blocks_per_page;
3214
3215                 size = EXT2_I_SIZE(inode);
3216                 if ((pb.last_init_lblock >= 0) &&
3217                     /* allow allocated blocks to end of PAGE_SIZE */
3218                     (size < (__u64)pb.last_init_lblock * fs->blocksize) &&
3219                     (pb.last_init_lblock / blkpg * blkpg != pb.last_init_lblock ||
3220                      size < (__u64)(pb.last_init_lblock & ~(blkpg-1)) *
3221                      fs->blocksize))
3222                         bad_size = 3;
3223                 else if (!(extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3224                          size > ext2_max_sizes[fs->super->s_log_block_size])
3225                         /* too big for a direct/indirect-mapped file */
3226                         bad_size = 4;
3227                 else if ((extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) &&
3228                          size >
3229                          ((1ULL << (32 + EXT2_BLOCK_SIZE_BITS(fs->super))) - 1))
3230                         /* too big for an extent-based file - 32bit ee_block */
3231                         bad_size = 6;
3232         }
3233         /* i_size for symlinks is checked elsewhere */
3234         if (bad_size && !LINUX_S_ISLNK(inode->i_mode)) {
3235                 /* Did inline_data set pctx->num earlier? */
3236                 if (bad_size != 7)
3237                         pctx->num = (pb.last_block + 1) * fs->blocksize;
3238                 pctx->group = bad_size;
3239                 if (fix_problem(ctx, PR_1_BAD_I_SIZE, pctx)) {
3240                         if (LINUX_S_ISDIR(inode->i_mode))
3241                                 pctx->num &= 0xFFFFFFFFULL;
3242                         ext2fs_inode_size_set(fs, inode, pctx->num);
3243                         if (EXT2_I_SIZE(inode) == 0 &&
3244                             (inode->i_flags & EXT4_INLINE_DATA_FL)) {
3245                                 memset(inode->i_block, 0,
3246                                        sizeof(inode->i_block));
3247                                 inode->i_flags &= ~EXT4_INLINE_DATA_FL;
3248                         }
3249                         dirty_inode++;
3250                 }
3251                 pctx->num = 0;
3252         }
3253         if (LINUX_S_ISREG(inode->i_mode) &&
3254             ext2fs_needs_large_file_feature(EXT2_I_SIZE(inode)))
3255                 ctx->large_files++;
3256         if ((fs->super->s_creator_os != EXT2_OS_HURD) &&
3257             ((pb.num_blocks != ext2fs_inode_i_blocks(fs, inode)) ||
3258              (ext2fs_has_feature_huge_file(fs->super) &&
3259               (inode->i_flags & EXT4_HUGE_FILE_FL) &&
3260               (inode->osd2.linux2.l_i_blocks_hi != 0)))) {
3261                 pctx->num = pb.num_blocks;
3262                 if (fix_problem(ctx, PR_1_BAD_I_BLOCKS, pctx)) {
3263                         inode->i_blocks = pb.num_blocks;
3264                         inode->osd2.linux2.l_i_blocks_hi = pb.num_blocks >> 32;
3265                         dirty_inode++;
3266                 }
3267                 pctx->num = 0;
3268         }
3269
3270         /*
3271          * The kernel gets mad if we ask it to allocate bigalloc clusters to
3272          * a block mapped file, so rebuild it as an extent file.  We can skip
3273          * symlinks because they're never rewritten.
3274          */
3275         if (ext2fs_has_feature_bigalloc(fs->super) &&
3276             (LINUX_S_ISREG(inode->i_mode) || LINUX_S_ISDIR(inode->i_mode)) &&
3277             ext2fs_inode_data_blocks2(fs, inode) > 0 &&
3278             (ino == EXT2_ROOT_INO || ino >= EXT2_FIRST_INO(fs->super)) &&
3279             !(inode->i_flags & (EXT4_EXTENTS_FL | EXT4_INLINE_DATA_FL)) &&
3280             fix_problem(ctx, PR_1_NO_BIGALLOC_BLOCKMAP_FILES, pctx)) {
3281                 pctx->errcode = e2fsck_rebuild_extents_later(ctx, ino);
3282                 if (pctx->errcode)
3283                         goto out;
3284         }
3285
3286         if (ctx->dirs_to_hash && pb.is_dir &&
3287             !(ctx->lost_and_found && ctx->lost_and_found == ino) &&
3288             !(inode->i_flags & EXT2_INDEX_FL) &&
3289             ((inode->i_size / fs->blocksize) >= 3))
3290                 e2fsck_rehash_dir_later(ctx, ino);
3291
3292 out:
3293         if (dirty_inode)
3294                 e2fsck_write_inode(ctx, ino, inode, "check_blocks");
3295 }
3296
3297 #if 0
3298 /*
3299  * Helper function called by process block when an illegal block is
3300  * found.  It returns a description about why the block is illegal
3301  */
3302 static char *describe_illegal_block(ext2_filsys fs, blk64_t block)
3303 {
3304         blk64_t super;
3305         int     i;
3306         static char     problem[80];
3307
3308         super = fs->super->s_first_data_block;
3309         strcpy(problem, "PROGRAMMING ERROR: Unknown reason for illegal block");
3310         if (block < super) {
3311                 sprintf(problem, "< FIRSTBLOCK (%u)", super);
3312                 return(problem);
3313         } else if (block >= ext2fs_blocks_count(fs->super)) {
3314                 sprintf(problem, "> BLOCKS (%u)", ext2fs_blocks_count(fs->super));
3315                 return(problem);
3316         }
3317         for (i = 0; i < fs->group_desc_count; i++) {
3318                 if (block == super) {
3319                         sprintf(problem, "is the superblock in group %d", i);
3320                         break;
3321                 }
3322                 if (block > super &&
3323                     block <= (super + fs->desc_blocks)) {
3324                         sprintf(problem, "is in the group descriptors "
3325                                 "of group %d", i);
3326                         break;
3327                 }
3328                 if (block == ext2fs_block_bitmap_loc(fs, i)) {
3329                         sprintf(problem, "is the block bitmap of group %d", i);
3330                         break;
3331                 }
3332                 if (block == ext2fs_inode_bitmap_loc(fs, i)) {
3333                         sprintf(problem, "is the inode bitmap of group %d", i);
3334                         break;
3335                 }
3336                 if (block >= ext2fs_inode_table_loc(fs, i) &&
3337                     (block < ext2fs_inode_table_loc(fs, i)
3338                      + fs->inode_blocks_per_group)) {
3339                         sprintf(problem, "is in the inode table of group %d",
3340                                 i);
3341                         break;
3342                 }
3343                 super += fs->super->s_blocks_per_group;
3344         }
3345         return(problem);
3346 }
3347 #endif
3348
3349 /*
3350  * This is a helper function for check_blocks().
3351  */
3352 static int process_block(ext2_filsys fs,
3353                   blk64_t       *block_nr,
3354                   e2_blkcnt_t blockcnt,
3355                   blk64_t ref_block EXT2FS_ATTR((unused)),
3356                   int ref_offset EXT2FS_ATTR((unused)),
3357                   void *priv_data)
3358 {
3359         struct process_block_struct *p;
3360         struct problem_context *pctx;
3361         blk64_t blk = *block_nr;
3362         int     ret_code = 0;
3363         problem_t       problem = 0;
3364         e2fsck_t        ctx;
3365
3366         p = (struct process_block_struct *) priv_data;
3367         pctx = p->pctx;
3368         ctx = p->ctx;
3369
3370         /*
3371          * For a directory, add logical block zero for processing even if it's
3372          * not mapped or we'll be perennially stuck with broken "." and ".."
3373          * entries.
3374          */
3375         if (p->is_dir && blockcnt == 0 && blk == 0) {
3376                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino, 0, 0);
3377                 if (pctx->errcode) {
3378                         pctx->blk = blk;
3379                         pctx->num = blockcnt;
3380                         goto failed_add_dir_block;
3381                 }
3382                 p->last_db_block++;
3383         }
3384
3385         if (blk == 0)
3386                 return 0;
3387
3388 #if 0
3389         printf("Process_block, inode %lu, block %u, #%d\n", p->ino, blk,
3390                blockcnt);
3391 #endif
3392
3393         /*
3394          * Simplistic fragmentation check.  We merely require that the
3395          * file be contiguous.  (Which can never be true for really
3396          * big files that are greater than a block group.)
3397          */
3398         if (p->previous_block && p->ino != EXT2_RESIZE_INO) {
3399                 if (p->previous_block+1 != blk) {
3400                         if (ctx->options & E2F_OPT_FRAGCHECK) {
3401                                 char type = '?';
3402
3403                                 if (p->is_dir)
3404                                         type = 'd';
3405                                 else if (p->is_reg)
3406                                         type = 'f';
3407
3408                                 printf(_("%6lu(%c): expecting %6lu "
3409                                          "got phys %6lu (blkcnt %lld)\n"),
3410                                        (unsigned long) pctx->ino, type,
3411                                        (unsigned long) p->previous_block+1,
3412                                        (unsigned long) blk,
3413                                        blockcnt);
3414                         }
3415                         p->fragmented = 1;
3416                 }
3417         }
3418
3419         if (p->is_dir && blockcnt > (1 << (21 - fs->super->s_log_block_size)))
3420                 problem = PR_1_TOOBIG_DIR;
3421         if (p->is_reg && p->num_blocks+1 >= p->max_blocks)
3422                 problem = PR_1_TOOBIG_REG;
3423         if (!p->is_dir && !p->is_reg && blockcnt > 0)
3424                 problem = PR_1_TOOBIG_SYMLINK;
3425
3426         if (blk < fs->super->s_first_data_block ||
3427             blk >= ext2fs_blocks_count(fs->super))
3428                 problem = PR_1_ILLEGAL_BLOCK_NUM;
3429
3430         /*
3431          * If this IND/DIND/TIND block is squatting atop some critical metadata
3432          * (group descriptors, superblock, bitmap, inode table), any write to
3433          * "fix" mapping problems will destroy the metadata.  We'll let pass 1b
3434          * fix that and restart fsck.
3435          */
3436         if (blockcnt < 0 &&
3437             p->ino != EXT2_RESIZE_INO &&
3438             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk)) {
3439                 pctx->blk = blk;
3440                 fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx);
3441                 ctx->flags |= E2F_FLAG_RESTART_LATER;
3442         }
3443
3444         if (problem) {
3445                 p->num_illegal_blocks++;
3446                 /*
3447                  * A bit of subterfuge here -- we're trying to fix a block
3448                  * mapping, but the IND/DIND/TIND block could have collided
3449                  * with some critical metadata.  So, fix the in-core mapping so
3450                  * iterate won't go insane, but return 0 instead of
3451                  * BLOCK_CHANGED so that it won't write the remapping out to
3452                  * our multiply linked block.
3453                  *
3454                  * Even if we previously determined that an *IND block
3455                  * conflicts with critical metadata, we must still try to
3456                  * iterate the *IND block as if it is an *IND block to find and
3457                  * mark the blocks it points to.  Better to be overly cautious
3458                  * with the used_blocks map so that we don't move the *IND
3459                  * block to a block that's really in use!
3460                  */
3461                 if (p->ino != EXT2_RESIZE_INO &&
3462                     ref_block != 0 &&
3463                     ext2fs_test_block_bitmap2(ctx->block_metadata_map,
3464                                               ref_block)) {
3465                         *block_nr = 0;
3466                         return 0;
3467                 }
3468                 if (!p->suppress && (p->num_illegal_blocks % 12) == 0) {
3469                         if (fix_problem(ctx, PR_1_TOO_MANY_BAD_BLOCKS, pctx)) {
3470                                 p->clear = 1;
3471                                 return BLOCK_ABORT;
3472                         }
3473                         if (fix_problem(ctx, PR_1_SUPPRESS_MESSAGES, pctx)) {
3474                                 p->suppress = 1;
3475                                 set_latch_flags(PR_LATCH_BLOCK,
3476                                                 PRL_SUPPRESS, 0);
3477                         }
3478                 }
3479                 pctx->blk = blk;
3480                 pctx->blkcount = blockcnt;
3481                 if (fix_problem(ctx, problem, pctx)) {
3482                         blk = *block_nr = 0;
3483                         ret_code = BLOCK_CHANGED;
3484                         p->inode_modified = 1;
3485                         /*
3486                          * If the directory block is too big and is beyond the
3487                          * end of the FS, don't bother trying to add it for
3488                          * processing -- the kernel would never have created a
3489                          * directory this large, and we risk an ENOMEM abort.
3490                          * In any case, the toobig handler for extent-based
3491                          * directories also doesn't feed toobig blocks to
3492                          * pass 2.
3493                          */
3494                         if (problem == PR_1_TOOBIG_DIR)
3495                                 return ret_code;
3496                         goto mark_dir;
3497                 } else
3498                         return 0;
3499         }
3500
3501         if (p->ino == EXT2_RESIZE_INO) {
3502                 /*
3503                  * The resize inode has already be sanity checked
3504                  * during pass #0 (the superblock checks).  All we
3505                  * have to do is mark the double indirect block as
3506                  * being in use; all of the other blocks are handled
3507                  * by mark_table_blocks()).
3508                  */
3509                 if (blockcnt == BLOCK_COUNT_DIND)
3510                         mark_block_used(ctx, blk);
3511                 p->num_blocks++;
3512         } else if (!(ctx->fs->cluster_ratio_bits &&
3513                      p->previous_block &&
3514                      (EXT2FS_B2C(ctx->fs, blk) ==
3515                       EXT2FS_B2C(ctx->fs, p->previous_block)) &&
3516                      (blk & EXT2FS_CLUSTER_MASK(ctx->fs)) ==
3517                      ((unsigned) blockcnt & EXT2FS_CLUSTER_MASK(ctx->fs)))) {
3518                 mark_block_used(ctx, blk);
3519                 p->num_blocks++;
3520         } else if (has_unaligned_cluster_map(ctx, p->previous_block,
3521                                              p->last_block, blk, blockcnt)) {
3522                 pctx->blk = blockcnt;
3523                 pctx->blk2 = blk;
3524                 fix_problem(ctx, PR_1_MISALIGNED_CLUSTER, pctx);
3525                 mark_block_used(ctx, blk);
3526                 mark_block_used(ctx, blk);
3527         }
3528         if (blockcnt >= 0)
3529                 p->last_block = blockcnt;
3530         p->previous_block = blk;
3531 mark_dir:
3532         if (p->is_dir && (blockcnt >= 0)) {
3533                 while (++p->last_db_block < blockcnt) {
3534                         pctx->errcode = ext2fs_add_dir_block2(fs->dblist,
3535                                                               p->ino, 0,
3536                                                               p->last_db_block);
3537                         if (pctx->errcode) {
3538                                 pctx->blk = 0;
3539                                 pctx->num = p->last_db_block;
3540                                 goto failed_add_dir_block;
3541                         }
3542                 }
3543                 pctx->errcode = ext2fs_add_dir_block2(fs->dblist, p->ino,
3544                                                       blk, blockcnt);
3545                 if (pctx->errcode) {
3546                         pctx->blk = blk;
3547                         pctx->num = blockcnt;
3548                 failed_add_dir_block:
3549                         fix_problem(ctx, PR_1_ADD_DBLOCK, pctx);
3550                         /* Should never get here */
3551                         ctx->flags |= E2F_FLAG_ABORT;
3552                         return BLOCK_ABORT;
3553                 }
3554         }
3555         return ret_code;
3556 }
3557
3558 static int process_bad_block(ext2_filsys fs,
3559                       blk64_t *block_nr,
3560                       e2_blkcnt_t blockcnt,
3561                       blk64_t ref_block EXT2FS_ATTR((unused)),
3562                       int ref_offset EXT2FS_ATTR((unused)),
3563                       void *priv_data)
3564 {
3565         struct process_block_struct *p;
3566         blk64_t         blk = *block_nr;
3567         blk64_t         first_block;
3568         dgrp_t          i;
3569         struct problem_context *pctx;
3570         e2fsck_t        ctx;
3571
3572         if (!blk)
3573                 return 0;
3574
3575         p = (struct process_block_struct *) priv_data;
3576         ctx = p->ctx;
3577         pctx = p->pctx;
3578
3579         pctx->ino = EXT2_BAD_INO;
3580         pctx->blk = blk;
3581         pctx->blkcount = blockcnt;
3582
3583         if ((blk < fs->super->s_first_data_block) ||
3584             (blk >= ext2fs_blocks_count(fs->super))) {
3585                 if (fix_problem(ctx, PR_1_BB_ILLEGAL_BLOCK_NUM, pctx)) {
3586                         *block_nr = 0;
3587                         return BLOCK_CHANGED;
3588                 } else
3589                         return 0;
3590         }
3591
3592         if (blockcnt < 0) {
3593                 if (ext2fs_test_block_bitmap2(p->fs_meta_blocks, blk)) {
3594                         p->bbcheck = 1;
3595                         if (fix_problem(ctx, PR_1_BB_FS_BLOCK, pctx)) {
3596                                 *block_nr = 0;
3597                                 return BLOCK_CHANGED;
3598                         }
3599                 } else if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3600                                                     blk)) {
3601                         p->bbcheck = 1;
3602                         if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK,
3603                                         pctx)) {
3604                                 *block_nr = 0;
3605                                 return BLOCK_CHANGED;
3606                         }
3607                         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3608                                 return BLOCK_ABORT;
3609                 } else
3610                         mark_block_used(ctx, blk);
3611                 return 0;
3612         }
3613 #if 0
3614         printf ("DEBUG: Marking %u as bad.\n", blk);
3615 #endif
3616         ctx->fs_badblocks_count++;
3617         /*
3618          * If the block is not used, then mark it as used and return.
3619          * If it is already marked as found, this must mean that
3620          * there's an overlap between the filesystem table blocks
3621          * (bitmaps and inode table) and the bad block list.
3622          */
3623         if (!ext2fs_test_block_bitmap2(ctx->block_found_map, blk)) {
3624                 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
3625                 return 0;
3626         }
3627         /*
3628          * Try to find the where the filesystem block was used...
3629          */
3630         first_block = fs->super->s_first_data_block;
3631
3632         for (i = 0; i < fs->group_desc_count; i++ ) {
3633                 pctx->group = i;
3634                 pctx->blk = blk;
3635                 if (!ext2fs_bg_has_super(fs, i))
3636                         goto skip_super;
3637                 if (blk == first_block) {
3638                         if (i == 0) {
3639                                 if (fix_problem(ctx,
3640                                                 PR_1_BAD_PRIMARY_SUPERBLOCK,
3641                                                 pctx)) {
3642                                         *block_nr = 0;
3643                                         return BLOCK_CHANGED;
3644                                 }
3645                                 return 0;
3646                         }
3647                         fix_problem(ctx, PR_1_BAD_SUPERBLOCK, pctx);
3648                         return 0;
3649                 }
3650                 if ((blk > first_block) &&
3651                     (blk <= first_block + fs->desc_blocks)) {
3652                         if (i == 0) {
3653                                 pctx->blk = *block_nr;
3654                                 if (fix_problem(ctx,
3655                         PR_1_BAD_PRIMARY_GROUP_DESCRIPTOR, pctx)) {
3656                                         *block_nr = 0;
3657                                         return BLOCK_CHANGED;
3658                                 }
3659                                 return 0;
3660                         }
3661                         fix_problem(ctx, PR_1_BAD_GROUP_DESCRIPTORS, pctx);
3662                         return 0;
3663                 }
3664         skip_super:
3665                 if (blk == ext2fs_block_bitmap_loc(fs, i)) {
3666                         if (fix_problem(ctx, PR_1_BB_BAD_BLOCK, pctx)) {
3667                                 ctx->invalid_block_bitmap_flag[i]++;
3668                                 ctx->invalid_bitmaps++;
3669                         }
3670                         return 0;
3671                 }
3672                 if (blk == ext2fs_inode_bitmap_loc(fs, i)) {
3673                         if (fix_problem(ctx, PR_1_IB_BAD_BLOCK, pctx)) {
3674                                 ctx->invalid_inode_bitmap_flag[i]++;
3675                                 ctx->invalid_bitmaps++;
3676                         }
3677                         return 0;
3678                 }
3679                 if ((blk >= ext2fs_inode_table_loc(fs, i)) &&
3680                     (blk < (ext2fs_inode_table_loc(fs, i) +
3681                             fs->inode_blocks_per_group))) {
3682                         /*
3683                          * If there are bad blocks in the inode table,
3684                          * the inode scan code will try to do
3685                          * something reasonable automatically.
3686                          */
3687                         return 0;
3688                 }
3689                 first_block += fs->super->s_blocks_per_group;
3690         }
3691         /*
3692          * If we've gotten to this point, then the only
3693          * possibility is that the bad block inode meta data
3694          * is using a bad block.
3695          */
3696         if ((blk == p->inode->i_block[EXT2_IND_BLOCK]) ||
3697             (blk == p->inode->i_block[EXT2_DIND_BLOCK]) ||
3698             (blk == p->inode->i_block[EXT2_TIND_BLOCK])) {
3699                 p->bbcheck = 1;
3700                 if (fix_problem(ctx, PR_1_BBINODE_BAD_METABLOCK, pctx)) {
3701                         *block_nr = 0;
3702                         return BLOCK_CHANGED;
3703                 }
3704                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
3705                         return BLOCK_ABORT;
3706                 return 0;
3707         }
3708
3709         pctx->group = -1;
3710
3711         /* Warn user that the block wasn't claimed */
3712         fix_problem(ctx, PR_1_PROGERR_CLAIMED_BLOCK, pctx);
3713
3714         return 0;
3715 }
3716
3717 static void new_table_block(e2fsck_t ctx, blk64_t first_block, dgrp_t group,
3718                             const char *name, int num, blk64_t *new_block)
3719 {
3720         ext2_filsys fs = ctx->fs;
3721         dgrp_t          last_grp;
3722         blk64_t         old_block = *new_block;
3723         blk64_t         last_block;
3724         dgrp_t          flexbg;
3725         unsigned        flexbg_size;
3726         int             i, is_flexbg;
3727         char            *buf;
3728         struct problem_context  pctx;
3729
3730         clear_problem_context(&pctx);
3731
3732         pctx.group = group;
3733         pctx.blk = old_block;
3734         pctx.str = name;
3735
3736         /*
3737          * For flex_bg filesystems, first try to allocate the metadata
3738          * within the flex_bg, and if that fails then try finding the
3739          * space anywhere in the filesystem.
3740          */
3741         is_flexbg = ext2fs_has_feature_flex_bg(fs->super);
3742         if (is_flexbg) {
3743                 flexbg_size = 1 << fs->super->s_log_groups_per_flex;
3744                 flexbg = group / flexbg_size;
3745                 first_block = ext2fs_group_first_block2(fs,
3746                                                         flexbg_size * flexbg);
3747                 last_grp = group | (flexbg_size - 1);
3748                 if (last_grp >= fs->group_desc_count)
3749                         last_grp = fs->group_desc_count - 1;
3750                 last_block = ext2fs_group_last_block2(fs, last_grp);
3751         } else
3752                 last_block = ext2fs_group_last_block2(fs, group);
3753         pctx.errcode = ext2fs_get_free_blocks2(fs, first_block, last_block,
3754                                                num, ctx->block_found_map,
3755                                                new_block);
3756         if (is_flexbg && (pctx.errcode == EXT2_ET_BLOCK_ALLOC_FAIL))
3757                 pctx.errcode = ext2fs_get_free_blocks2(fs,
3758                                 fs->super->s_first_data_block,
3759                                 ext2fs_blocks_count(fs->super),
3760                                 num, ctx->block_found_map, new_block);
3761         if (pctx.errcode) {
3762                 pctx.num = num;
3763                 fix_problem(ctx, PR_1_RELOC_BLOCK_ALLOCATE, &pctx);
3764                 ext2fs_unmark_valid(fs);
3765                 ctx->flags |= E2F_FLAG_ABORT;
3766                 return;
3767         }
3768         pctx.errcode = ext2fs_get_mem(fs->blocksize, &buf);
3769         if (pctx.errcode) {
3770                 fix_problem(ctx, PR_1_RELOC_MEMORY_ALLOCATE, &pctx);
3771                 ext2fs_unmark_valid(fs);
3772                 ctx->flags |= E2F_FLAG_ABORT;
3773                 return;
3774         }
3775         ext2fs_mark_super_dirty(fs);
3776         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
3777         pctx.blk2 = *new_block;
3778         fix_problem(ctx, (old_block ? PR_1_RELOC_FROM_TO :
3779                           PR_1_RELOC_TO), &pctx);
3780         pctx.blk2 = 0;
3781         for (i = 0; i < num; i++) {
3782                 pctx.blk = i;
3783                 ext2fs_mark_block_bitmap2(ctx->block_found_map, (*new_block)+i);
3784                 if (old_block) {
3785                         pctx.errcode = io_channel_read_blk64(fs->io,
3786                                    old_block + i, 1, buf);
3787                         if (pctx.errcode)
3788                                 fix_problem(ctx, PR_1_RELOC_READ_ERR, &pctx);
3789                         pctx.blk = (*new_block) + i;
3790                         pctx.errcode = io_channel_write_blk64(fs->io, pctx.blk,
3791                                                               1, buf);
3792                 } else {
3793                         pctx.blk = (*new_block) + i;
3794                         pctx.errcode = ext2fs_zero_blocks2(fs, pctx.blk, 1,
3795                                                            NULL, NULL);
3796                 }
3797
3798                 if (pctx.errcode)
3799                         fix_problem(ctx, PR_1_RELOC_WRITE_ERR, &pctx);
3800         }
3801         ext2fs_free_mem(&buf);
3802 }
3803
3804 /*
3805  * This routine gets called at the end of pass 1 if bad blocks are
3806  * detected in the superblock, group descriptors, inode_bitmaps, or
3807  * block bitmaps.  At this point, all of the blocks have been mapped
3808  * out, so we can try to allocate new block(s) to replace the bad
3809  * blocks.
3810  */
3811 static void handle_fs_bad_blocks(e2fsck_t ctx)
3812 {
3813         ext2_filsys fs = ctx->fs;
3814         dgrp_t          i;
3815         blk64_t         first_block;
3816         blk64_t         new_blk;
3817
3818         for (i = 0; i < fs->group_desc_count; i++) {
3819                 first_block = ext2fs_group_first_block2(fs, i);
3820
3821                 if (ctx->invalid_block_bitmap_flag[i]) {
3822                         new_blk = ext2fs_block_bitmap_loc(fs, i);
3823                         new_table_block(ctx, first_block, i, _("block bitmap"),
3824                                         1, &new_blk);
3825                         ext2fs_block_bitmap_loc_set(fs, i, new_blk);
3826                 }
3827                 if (ctx->invalid_inode_bitmap_flag[i]) {
3828                         new_blk = ext2fs_inode_bitmap_loc(fs, i);
3829                         new_table_block(ctx, first_block, i, _("inode bitmap"),
3830                                         1, &new_blk);
3831                         ext2fs_inode_bitmap_loc_set(fs, i, new_blk);
3832                 }
3833                 if (ctx->invalid_inode_table_flag[i]) {
3834                         new_blk = ext2fs_inode_table_loc(fs, i);
3835                         new_table_block(ctx, first_block, i, _("inode table"),
3836                                         fs->inode_blocks_per_group,
3837                                         &new_blk);
3838                         ext2fs_inode_table_loc_set(fs, i, new_blk);
3839                         ctx->flags |= E2F_FLAG_RESTART;
3840                 }
3841         }
3842         ctx->invalid_bitmaps = 0;
3843 }
3844
3845 /*
3846  * This routine marks all blocks which are used by the superblock,
3847  * group descriptors, inode bitmaps, and block bitmaps.
3848  */
3849 static void mark_table_blocks(e2fsck_t ctx)
3850 {
3851         ext2_filsys fs = ctx->fs;
3852         blk64_t b;
3853         dgrp_t  i;
3854         unsigned int    j;
3855         struct problem_context pctx;
3856
3857         clear_problem_context(&pctx);
3858
3859         for (i = 0; i < fs->group_desc_count; i++) {
3860                 pctx.group = i;
3861
3862                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_found_map);
3863                 ext2fs_reserve_super_and_bgd(fs, i, ctx->block_metadata_map);
3864
3865                 /*
3866                  * Mark the blocks used for the inode table
3867                  */
3868                 if (ext2fs_inode_table_loc(fs, i)) {
3869                         for (j = 0, b = ext2fs_inode_table_loc(fs, i);
3870                              j < fs->inode_blocks_per_group;
3871                              j++, b++) {
3872                                 if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3873                                                              b)) {
3874                                         pctx.blk = b;
3875                                         if (!ctx->invalid_inode_table_flag[i] &&
3876                                             fix_problem(ctx,
3877                                                 PR_1_ITABLE_CONFLICT, &pctx)) {
3878                                                 ctx->invalid_inode_table_flag[i]++;
3879                                                 ctx->invalid_bitmaps++;
3880                                         }
3881                                 } else {
3882                                     ext2fs_mark_block_bitmap2(
3883                                                 ctx->block_found_map, b);
3884                                     ext2fs_mark_block_bitmap2(
3885                                                 ctx->block_metadata_map, b);
3886                                 }
3887                         }
3888                 }
3889
3890                 /*
3891                  * Mark block used for the block bitmap
3892                  */
3893                 if (ext2fs_block_bitmap_loc(fs, i)) {
3894                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3895                                      ext2fs_block_bitmap_loc(fs, i))) {
3896                                 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
3897                                 if (fix_problem(ctx, PR_1_BB_CONFLICT, &pctx)) {
3898                                         ctx->invalid_block_bitmap_flag[i]++;
3899                                         ctx->invalid_bitmaps++;
3900                                 }
3901                         } else {
3902                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
3903                                      ext2fs_block_bitmap_loc(fs, i));
3904                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
3905                                      ext2fs_block_bitmap_loc(fs, i));
3906                         }
3907                 }
3908                 /*
3909                  * Mark block used for the inode bitmap
3910                  */
3911                 if (ext2fs_inode_bitmap_loc(fs, i)) {
3912                         if (ext2fs_test_block_bitmap2(ctx->block_found_map,
3913                                      ext2fs_inode_bitmap_loc(fs, i))) {
3914                                 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
3915                                 if (fix_problem(ctx, PR_1_IB_CONFLICT, &pctx)) {
3916                                         ctx->invalid_inode_bitmap_flag[i]++;
3917                                         ctx->invalid_bitmaps++;
3918                                 }
3919                         } else {
3920                             ext2fs_mark_block_bitmap2(ctx->block_metadata_map,
3921                                      ext2fs_inode_bitmap_loc(fs, i));
3922                             ext2fs_mark_block_bitmap2(ctx->block_found_map,
3923                                      ext2fs_inode_bitmap_loc(fs, i));
3924                         }
3925                 }
3926         }
3927 }
3928
3929 /*
3930  * Thes subroutines short circuits ext2fs_get_blocks and
3931  * ext2fs_check_directory; we use them since we already have the inode
3932  * structure, so there's no point in letting the ext2fs library read
3933  * the inode again.
3934  */
3935 static errcode_t pass1_get_blocks(ext2_filsys fs, ext2_ino_t ino,
3936                                   blk_t *blocks)
3937 {
3938         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3939         int     i;
3940
3941         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
3942                 return EXT2_ET_CALLBACK_NOTHANDLED;
3943
3944         for (i=0; i < EXT2_N_BLOCKS; i++)
3945                 blocks[i] = ctx->stashed_inode->i_block[i];
3946         return 0;
3947 }
3948
3949 static errcode_t pass1_read_inode(ext2_filsys fs, ext2_ino_t ino,
3950                                   struct ext2_inode *inode)
3951 {
3952         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3953
3954         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
3955                 return EXT2_ET_CALLBACK_NOTHANDLED;
3956         *inode = *ctx->stashed_inode;
3957         return 0;
3958 }
3959
3960 static errcode_t pass1_write_inode(ext2_filsys fs, ext2_ino_t ino,
3961                             struct ext2_inode *inode)
3962 {
3963         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3964
3965         if ((ino == ctx->stashed_ino) && ctx->stashed_inode &&
3966                 (inode != ctx->stashed_inode))
3967                 *ctx->stashed_inode = *inode;
3968         return EXT2_ET_CALLBACK_NOTHANDLED;
3969 }
3970
3971 static errcode_t pass1_check_directory(ext2_filsys fs, ext2_ino_t ino)
3972 {
3973         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3974
3975         if ((ino != ctx->stashed_ino) || !ctx->stashed_inode)
3976                 return EXT2_ET_CALLBACK_NOTHANDLED;
3977
3978         if (!LINUX_S_ISDIR(ctx->stashed_inode->i_mode))
3979                 return EXT2_ET_NO_DIRECTORY;
3980         return 0;
3981 }
3982
3983 static errcode_t e2fsck_get_alloc_block(ext2_filsys fs, blk64_t goal,
3984                                         blk64_t *ret)
3985 {
3986         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
3987         errcode_t       retval;
3988         blk64_t         new_block;
3989
3990         if (ctx->block_found_map) {
3991                 retval = ext2fs_new_block2(fs, goal, ctx->block_found_map,
3992                                            &new_block);
3993                 if (retval)
3994                         return retval;
3995                 if (fs->block_map) {
3996                         ext2fs_mark_block_bitmap2(fs->block_map, new_block);
3997                         ext2fs_mark_bb_dirty(fs);
3998                 }
3999         } else {
4000                 if (!fs->block_map) {
4001                         retval = ext2fs_read_block_bitmap(fs);
4002                         if (retval)
4003                                 return retval;
4004                 }
4005
4006                 retval = ext2fs_new_block2(fs, goal, fs->block_map, &new_block);
4007                 if (retval)
4008                         return retval;
4009         }
4010
4011         *ret = new_block;
4012         return (0);
4013 }
4014
4015 static errcode_t e2fsck_new_range(ext2_filsys fs, int flags, blk64_t goal,
4016                                   blk64_t len, blk64_t *pblk, blk64_t *plen)
4017 {
4018         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4019         errcode_t       retval;
4020
4021         if (ctx->block_found_map)
4022                 return ext2fs_new_range(fs, flags, goal, len,
4023                                         ctx->block_found_map, pblk, plen);
4024
4025         if (!fs->block_map) {
4026                 retval = ext2fs_read_block_bitmap(fs);
4027                 if (retval)
4028                         return retval;
4029         }
4030
4031         return ext2fs_new_range(fs, flags, goal, len, fs->block_map,
4032                                 pblk, plen);
4033 }
4034
4035 static void e2fsck_block_alloc_stats(ext2_filsys fs, blk64_t blk, int inuse)
4036 {
4037         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4038
4039         /* Never free a critical metadata block */
4040         if (ctx->block_found_map &&
4041             ctx->block_metadata_map &&
4042             inuse < 0 &&
4043             ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk))
4044                 return;
4045
4046         if (ctx->block_found_map) {
4047                 if (inuse > 0)
4048                         ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
4049                 else
4050                         ext2fs_unmark_block_bitmap2(ctx->block_found_map, blk);
4051         }
4052 }
4053
4054 static void e2fsck_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
4055                                            blk_t num, int inuse)
4056 {
4057         e2fsck_t ctx = (e2fsck_t) fs->priv_data;
4058
4059         /* Never free a critical metadata block */
4060         if (ctx->block_found_map &&
4061             ctx->block_metadata_map &&
4062             inuse < 0 &&
4063             ext2fs_test_block_bitmap_range2(ctx->block_metadata_map, blk, num))
4064                 return;
4065
4066         if (ctx->block_found_map) {
4067                 if (inuse > 0)
4068                         ext2fs_mark_block_bitmap_range2(ctx->block_found_map,
4069                                                         blk, num);
4070                 else
4071                         ext2fs_unmark_block_bitmap_range2(ctx->block_found_map,
4072                                                         blk, num);
4073         }
4074 }
4075
4076 void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts)
4077 {
4078         ext2_filsys fs = ctx->fs;
4079
4080         if (use_shortcuts) {
4081                 fs->get_blocks = pass1_get_blocks;
4082                 fs->check_directory = pass1_check_directory;
4083                 fs->read_inode = pass1_read_inode;
4084                 fs->write_inode = pass1_write_inode;
4085                 ctx->stashed_ino = 0;
4086         } else {
4087                 fs->get_blocks = 0;
4088                 fs->check_directory = 0;
4089                 fs->read_inode = 0;
4090                 fs->write_inode = 0;
4091         }
4092 }
4093
4094 void e2fsck_intercept_block_allocations(e2fsck_t ctx)
4095 {
4096         ext2fs_set_alloc_block_callback(ctx->fs, e2fsck_get_alloc_block, 0);
4097         ext2fs_set_block_alloc_stats_callback(ctx->fs,
4098                                                 e2fsck_block_alloc_stats, 0);
4099         ext2fs_set_new_range_callback(ctx->fs, e2fsck_new_range, NULL);
4100         ext2fs_set_block_alloc_stats_range_callback(ctx->fs,
4101                                         e2fsck_block_alloc_stats_range, NULL);
4102 }