e2fsck/super.c

   1 /*
   2  * e2fsck.c - superblock checks
   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
  12 #ifdef HAVE_ERRNO_H
  13 #include <errno.h>
  14 #endif
  15
  16 #ifndef EXT2_SKIP_UUID
  17 #include "uuid/uuid.h"
  18 #endif
  19 #include "e2fsck.h"
  20 #include "problem.h"
  21
  22 #define MIN_CHECK 1
  23 #define MAX_CHECK 2
  24
  25 static void check_super_value(e2fsck_t ctx, const char *descr,
  26                               unsigned long value, int flags,
  27                               unsigned long min_val, unsigned long max_val)
  28 {
  29         struct          problem_context pctx;
  30
  31         if (((flags & MIN_CHECK) && (value < min_val)) ||
  32             ((flags & MAX_CHECK) && (value > max_val))) {
  33                 clear_problem_context(&pctx);
  34                 pctx.num = value;
  35                 pctx.str = descr;
  36                 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
  37                 ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
  38         }
  39 }
  40
  41 /*
  42  * This routine may get stubbed out in special compilations of the
  43  * e2fsck code..
  44  */
  45 #ifndef EXT2_SPECIAL_DEVICE_SIZE
  46 errcode_t e2fsck_get_device_size(e2fsck_t ctx)
  47 {
  48         return (ext2fs_get_device_size(ctx->filesystem_name,
  49                                        EXT2_BLOCK_SIZE(ctx->fs->super),
  50                                        &ctx->num_blocks));
  51 }
  52 #endif
  53
  54 /*
  55  * helper function to release an inode
  56  */
  57 struct process_block_struct {
  58         e2fsck_t        ctx;
  59         char            *buf;
  60         struct problem_context *pctx;
  61         int             truncating;
  62         int             truncate_offset;
  63         e2_blkcnt_t     truncate_block;
  64         int             truncated_blocks;
  65         int             abort;
  66         errcode_t       errcode;
  67 };
  68
  69 static int release_inode_block(ext2_filsys fs,
  70                                blk_t    *block_nr,
  71                                e2_blkcnt_t blockcnt,
  72                                blk_t    ref_blk EXT2FS_ATTR((unused)),
  73                                int      ref_offset EXT2FS_ATTR((unused)),
  74                                void *priv_data)
  75 {
  76         struct process_block_struct *pb;
  77         e2fsck_t                ctx;
  78         struct problem_context  *pctx;
  79         blk_t                   blk = *block_nr;
  80         int                     retval = 0;
  81
  82         pb = (struct process_block_struct *) priv_data;
  83         ctx = pb->ctx;
  84         pctx = pb->pctx;
  85
  86         pctx->blk = blk;
  87         pctx->blkcount = blockcnt;
  88
  89         if (HOLE_BLKADDR(blk))
  90                 return 0;
  91
  92         if ((blk < fs->super->s_first_data_block) ||
  93             (blk >= fs->super->s_blocks_count)) {
  94                 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_BLOCK_NUM, pctx);
  95         return_abort:
  96                 pb->abort = 1;
  97                 return BLOCK_ABORT;
  98         }
  99
 100         if (!ext2fs_test_block_bitmap(fs->block_map, blk)) {
 101                 fix_problem(ctx, PR_0_ORPHAN_ALREADY_CLEARED_BLOCK, pctx);
 102                 goto return_abort;
 103         }
 104
 105         /*
 106          * If we are deleting an orphan, then we leave the fields alone.
 107          * If we are truncating an orphan, then update the inode fields
 108          * and clean up any partial block data.
 109          */
 110         if (pb->truncating) {
 111                 /*
 112                  * We only remove indirect blocks if they are
 113                  * completely empty.
 114                  */
 115                 if (blockcnt < 0) {
 116                         int     i, limit;
 117                         blk_t   *bp;
 118
 119                         pb->errcode = io_channel_read_blk(fs->io, blk, 1,
 120                                                         pb->buf);
 121                         if (pb->errcode)
 122                                 goto return_abort;
 123
 124                         limit = fs->blocksize >> 2;
 125                         for (i = 0, bp = (blk_t *) pb->buf;
 126                              i < limit;  i++, bp++)
 127                                 if (*bp)
 128                                         return 0;
 129                 }
 130                 /*
 131                  * We don't remove direct blocks until we've reached
 132                  * the truncation block.
 133                  */
 134                 if (blockcnt >= 0 && blockcnt < pb->truncate_block)
 135                         return 0;
 136                 /*
 137                  * If part of the last block needs truncating, we do
 138                  * it here.
 139                  */
 140                 if ((blockcnt == pb->truncate_block) && pb->truncate_offset) {
 141                         pb->errcode = io_channel_read_blk(fs->io, blk, 1,
 142                                                         pb->buf);
 143                         if (pb->errcode)
 144                                 goto return_abort;
 145                         memset(pb->buf + pb->truncate_offset, 0,
 146                                fs->blocksize - pb->truncate_offset);
 147                         pb->errcode = io_channel_write_blk(fs->io, blk, 1,
 148                                                          pb->buf);
 149                         if (pb->errcode)
 150                                 goto return_abort;
 151                 }
 152                 pb->truncated_blocks++;
 153                 *block_nr = 0;
 154                 retval |= BLOCK_CHANGED;
 155         }
 156
 157         ext2fs_block_alloc_stats(fs, blk, -1);
 158         return retval;
 159 }
 160
 161 /*
 162  * This function releases an inode.  Returns 1 if an inconsistency was
 163  * found.  If the inode has a link count, then it is being truncated and
 164  * not deleted.
 165  */
 166 static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
 167                                 struct ext2_inode *inode, char *block_buf,
 168                                 struct problem_context *pctx)
 169 {
 170         struct process_block_struct     pb;
 171         ext2_filsys                     fs = ctx->fs;
 172         errcode_t                       retval;
 173         __u32                           count;
 174
 175         if (!ext2fs_inode_has_valid_blocks(inode))
 176                 return 0;
 177
 178         pb.buf = block_buf + 3 * ctx->fs->blocksize;
 179         pb.ctx = ctx;
 180         pb.abort = 0;
 181         pb.errcode = 0;
 182         pb.pctx = pctx;
 183         if (inode->i_links_count) {
 184                 pb.truncating = 1;
 185                 pb.truncate_block = (e2_blkcnt_t)
 186                         ((((long long)inode->i_size_high << 32) +
 187                           inode->i_size + fs->blocksize - 1) /
 188                          fs->blocksize);
 189                 pb.truncate_offset = inode->i_size % fs->blocksize;
 190         } else {
 191                 pb.truncating = 0;
 192                 pb.truncate_block = 0;
 193                 pb.truncate_offset = 0;
 194         }
 195         pb.truncated_blocks = 0;
 196         retval = ext2fs_block_iterate2(fs, ino, BLOCK_FLAG_DEPTH_TRAVERSE,
 197                                       block_buf, release_inode_block, &pb);
 198         if (retval) {
 199                 com_err("release_inode_blocks", retval,
 200                         _("while calling ext2fs_block_iterate for inode %d"),
 201                         ino);
 202                 return 1;
 203         }
 204         if (pb.abort)
 205                 return 1;
 206
 207         /* Refresh the inode since ext2fs_block_iterate may have changed it */
 208         e2fsck_read_inode(ctx, ino, inode, "release_inode_blocks");
 209
 210         if (pb.truncated_blocks)
 211                 inode->i_blocks -= pb.truncated_blocks *
 212                         (fs->blocksize / 512);
 213
 214         if (inode->i_file_acl) {
 215                 retval = ext2fs_adjust_ea_refcount(fs, inode->i_file_acl,
 216                                                    block_buf, -1, &count);
 217                 if (retval == EXT2_ET_BAD_EA_BLOCK_NUM) {
 218                         retval = 0;
 219                         count = 1;
 220                 }
 221                 if (retval) {
 222                         com_err("release_inode_blocks", retval,
 223                 _("while calling ext2fs_adjust_ea_refocunt for inode %d"),
 224                                 ino);
 225                         return 1;
 226                 }
 227                 if (count == 0)
 228                         ext2fs_block_alloc_stats(fs, inode->i_file_acl, -1);
 229                 inode->i_file_acl = 0;
 230         }
 231         return 0;
 232 }
 233
 234 /*
 235  * This function releases all of the orphan inodes.  It returns 1 if
 236  * it hit some error, and 0 on success.
 237  */
 238 static int release_orphan_inodes(e2fsck_t ctx)
 239 {
 240         ext2_filsys fs = ctx->fs;
 241         ext2_ino_t      ino, next_ino;
 242         struct ext2_inode inode;
 243         struct problem_context pctx;
 244         char *block_buf;
 245
 246         if ((ino = fs->super->s_last_orphan) == 0)
 247                 return 0;
 248
 249         /*
 250          * Win or lose, we won't be using the head of the orphan inode
 251          * list again.
 252          */
 253         fs->super->s_last_orphan = 0;
 254         ext2fs_mark_super_dirty(fs);
 255
 256         /*
 257          * If the filesystem contains errors, don't run the orphan
 258          * list, since the orphan list can't be trusted; and we're
 259          * going to be running a full e2fsck run anyway...
 260          */
 261         if (fs->super->s_state & EXT2_ERROR_FS)
 262                 return 0;
 263
 264         if ((ino < EXT2_FIRST_INODE(fs->super)) ||
 265             (ino > fs->super->s_inodes_count)) {
 266                 clear_problem_context(&pctx);
 267                 pctx.ino = ino;
 268                 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx);
 269                 return 1;
 270         }
 271
 272         block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
 273                                                     "block iterate buffer");
 274         e2fsck_read_bitmaps(ctx);
 275
 276         while (ino) {
 277                 e2fsck_read_inode(ctx, ino, &inode, "release_orphan_inodes");
 278                 clear_problem_context(&pctx);
 279                 pctx.ino = ino;
 280                 pctx.inode = &inode;
 281                 pctx.str = inode.i_links_count ? _("Truncating") :
 282                         _("Clearing");
 283
 284                 fix_problem(ctx, PR_0_ORPHAN_CLEAR_INODE, &pctx);
 285
 286                 next_ino = inode.i_dtime;
 287                 if (next_ino &&
 288                     ((next_ino < EXT2_FIRST_INODE(fs->super)) ||
 289                      (next_ino > fs->super->s_inodes_count))) {
 290                         pctx.ino = next_ino;
 291                         fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
 292                         goto return_abort;
 293                 }
 294
 295                 if (release_inode_blocks(ctx, ino, &inode, block_buf, &pctx))
 296                         goto return_abort;
 297
 298                 if (!inode.i_links_count) {
 299                         ext2fs_inode_alloc_stats2(fs, ino, -1,
 300                                                   LINUX_S_ISDIR(inode.i_mode));
 301                         inode.i_dtime = ctx->now;
 302                 } else {
 303                         inode.i_dtime = 0;
 304                 }
 305                 e2fsck_write_inode(ctx, ino, &inode, "delete_file");
 306                 ino = next_ino;
 307         }
 308         ext2fs_free_mem(&block_buf);
 309         return 0;
 310 return_abort:
 311         ext2fs_free_mem(&block_buf);
 312         return 1;
 313 }
 314
 315 /*
 316  * Check the resize inode to make sure it is sane.  We check both for
 317  * the case where on-line resizing is not enabled (in which case the
 318  * resize inode should be cleared) as well as the case where on-line
 319  * resizing is enabled.
 320  */
 321 void check_resize_inode(e2fsck_t ctx)
 322 {
 323         ext2_filsys fs = ctx->fs;
 324         struct ext2_inode inode;
 325         struct problem_context  pctx;
 326         int             i, j, gdt_off, ind_off;
 327         blk_t           blk, pblk, expect;
 328         __u32           *dind_buf = 0, *ind_buf;
 329         errcode_t       retval;
 330
 331         clear_problem_context(&pctx);
 332
 333         /*
 334          * If the resize inode feature isn't set, then
 335          * s_reserved_gdt_blocks must be zero.
 336          */
 337         if (!(fs->super->s_feature_compat &
 338               EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
 339                 if (fs->super->s_reserved_gdt_blocks) {
 340                         pctx.num = fs->super->s_reserved_gdt_blocks;
 341                         if (fix_problem(ctx, PR_0_NONZERO_RESERVED_GDT_BLOCKS,
 342                                         &pctx)) {
 343                                 fs->super->s_reserved_gdt_blocks = 0;
 344                                 ext2fs_mark_super_dirty(fs);
 345                         }
 346                 }
 347         }
 348
 349         /* Read the resize inode */
 350         pctx.ino = EXT2_RESIZE_INO;
 351         retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode);
 352         if (retval) {
 353                 if (fs->super->s_feature_compat &
 354                     EXT2_FEATURE_COMPAT_RESIZE_INODE)
 355                         ctx->flags |= E2F_FLAG_RESIZE_INODE;
 356                 return;
 357         }
 358
 359         /*
 360          * If the resize inode feature isn't set, check to make sure
 361          * the resize inode is cleared; then we're done.
 362          */
 363         if (!(fs->super->s_feature_compat &
 364               EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
 365                 for (i=0; i < EXT2_N_BLOCKS; i++) {
 366                         if (inode.i_block[i])
 367                                 break;
 368                 }
 369                 if ((i < EXT2_N_BLOCKS) &&
 370                     fix_problem(ctx, PR_0_CLEAR_RESIZE_INODE, &pctx)) {
 371                         memset(&inode, 0, sizeof(inode));
 372                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
 373                                            "clear_resize");
 374                 }
 375                 return;
 376         }
 377
 378         /*
 379          * The resize inode feature is enabled; check to make sure the
 380          * only block in use is the double indirect block
 381          */
 382         blk = inode.i_block[EXT2_DIND_BLOCK];
 383         for (i=0; i < EXT2_N_BLOCKS; i++) {
 384                 if (i != EXT2_DIND_BLOCK && inode.i_block[i])
 385                         break;
 386         }
 387         if ((i < EXT2_N_BLOCKS) || !blk || !inode.i_links_count ||
 388             !(inode.i_mode & LINUX_S_IFREG) ||
 389             (blk < fs->super->s_first_data_block ||
 390              blk >= fs->super->s_blocks_count)) {
 391         resize_inode_invalid:
 392                 if (fix_problem(ctx, PR_0_RESIZE_INODE_INVALID, &pctx)) {
 393                         memset(&inode, 0, sizeof(inode));
 394                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
 395                                            "clear_resize");
 396                         ctx->flags |= E2F_FLAG_RESIZE_INODE;
 397                 }
 398                 if (!(ctx->options & E2F_OPT_READONLY)) {
 399                         fs->super->s_state &= ~EXT2_VALID_FS;
 400                         ext2fs_mark_super_dirty(fs);
 401                 }
 402                 goto cleanup;
 403         }
 404         dind_buf = (__u32 *) e2fsck_allocate_memory(ctx, fs->blocksize * 2,
 405                                                     "resize dind buffer");
 406         ind_buf = (__u32 *) ((char *) dind_buf + fs->blocksize);
 407
 408         retval = ext2fs_read_ind_block(fs, blk, dind_buf);
 409         if (retval)
 410                 goto resize_inode_invalid;
 411
 412         gdt_off = fs->desc_blocks;
 413         pblk = fs->super->s_first_data_block + 1 + fs->desc_blocks;
 414         for (i = 0; i < fs->super->s_reserved_gdt_blocks / 4;
 415              i++, gdt_off++, pblk++) {
 416                 gdt_off %= fs->blocksize/4;
 417                 if (dind_buf[gdt_off] != pblk)
 418                         goto resize_inode_invalid;
 419                 retval = ext2fs_read_ind_block(fs, pblk, ind_buf);
 420                 if (retval)
 421                         goto resize_inode_invalid;
 422                 ind_off = 0;
 423                 for (j = 1; j < fs->group_desc_count; j++) {
 424                         if (!ext2fs_bg_has_super(fs, j))
 425                                 continue;
 426                         expect = pblk + (j * fs->super->s_blocks_per_group);
 427                         if (ind_buf[ind_off] != expect)
 428                                 goto resize_inode_invalid;
 429                         ind_off++;
 430                 }
 431         }
 432
 433 cleanup:
 434         if (dind_buf)
 435                 ext2fs_free_mem(&dind_buf);
 436
 437  }
 438
 439 void check_super_block(e2fsck_t ctx)
 440 {
 441         ext2_filsys fs = ctx->fs;
 442         blk_t   first_block, last_block;
 443         struct ext2_super_block *sb = fs->super;
 444         struct ext2_group_desc *gd;
 445         blk_t   blocks_per_group = fs->super->s_blocks_per_group;
 446         blk_t   bpg_max;
 447         int     inodes_per_block;
 448         int     ipg_max;
 449         int     inode_size;
 450         dgrp_t  i;
 451         blk_t   should_be;
 452         struct problem_context  pctx;
 453         __u32   free_blocks = 0, free_inodes = 0;
 454
 455         inodes_per_block = EXT2_INODES_PER_BLOCK(fs->super);
 456         ipg_max = inodes_per_block * (blocks_per_group - 4);
 457         if (ipg_max > EXT2_MAX_INODES_PER_GROUP(sb))
 458                 ipg_max = EXT2_MAX_INODES_PER_GROUP(sb);
 459         bpg_max = 8 * EXT2_BLOCK_SIZE(sb);
 460         if (bpg_max > EXT2_MAX_BLOCKS_PER_GROUP(sb))
 461                 bpg_max = EXT2_MAX_BLOCKS_PER_GROUP(sb);
 462
 463         ctx->invalid_inode_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
 464                  sizeof(int) * fs->group_desc_count, "invalid_inode_bitmap");
 465         ctx->invalid_block_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
 466                  sizeof(int) * fs->group_desc_count, "invalid_block_bitmap");
 467         ctx->invalid_inode_table_flag = (int *) e2fsck_allocate_memory(ctx,
 468                 sizeof(int) * fs->group_desc_count, "invalid_inode_table");
 469
 470         clear_problem_context(&pctx);
 471
 472         /*
 473          * Verify the super block constants...
 474          */
 475         check_super_value(ctx, "inodes_count", sb->s_inodes_count,
 476                           MIN_CHECK, 1, 0);
 477         check_super_value(ctx, "blocks_count", sb->s_blocks_count,
 478                           MIN_CHECK, 1, 0);
 479         check_super_value(ctx, "first_data_block", sb->s_first_data_block,
 480                           MAX_CHECK, 0, sb->s_blocks_count);
 481         check_super_value(ctx, "log_block_size", sb->s_log_block_size,
 482                           MIN_CHECK | MAX_CHECK, 0,
 483                           EXT2_MAX_BLOCK_LOG_SIZE - EXT2_MIN_BLOCK_LOG_SIZE);
 484         check_super_value(ctx, "log_frag_size", sb->s_log_frag_size,
 485                           MIN_CHECK | MAX_CHECK, 0, sb->s_log_block_size);
 486         check_super_value(ctx, "frags_per_group", sb->s_frags_per_group,
 487                           MIN_CHECK | MAX_CHECK, sb->s_blocks_per_group,
 488                           bpg_max);
 489         check_super_value(ctx, "blocks_per_group", sb->s_blocks_per_group,
 490                           MIN_CHECK | MAX_CHECK, 8, bpg_max);
 491         check_super_value(ctx, "inodes_per_group", sb->s_inodes_per_group,
 492                           MIN_CHECK | MAX_CHECK, inodes_per_block, ipg_max);
 493         check_super_value(ctx, "r_blocks_count", sb->s_r_blocks_count,
 494                           MAX_CHECK, 0, sb->s_blocks_count / 2);
 495         check_super_value(ctx, "reserved_gdt_blocks",
 496                           sb->s_reserved_gdt_blocks, MAX_CHECK, 0,
 497                           fs->blocksize/4);
 498         inode_size = EXT2_INODE_SIZE(sb);
 499         check_super_value(ctx, "inode_size",
 500                           inode_size, MIN_CHECK | MAX_CHECK,
 501                           EXT2_GOOD_OLD_INODE_SIZE, fs->blocksize);
 502         if (inode_size & (inode_size - 1)) {
 503                 pctx.num = inode_size;
 504                 pctx.str = "inode_size";
 505                 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
 506                 ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
 507                 return;
 508         }
 509
 510         if (!ctx->num_blocks) {
 511                 pctx.errcode = e2fsck_get_device_size(ctx);
 512                 if (pctx.errcode && pctx.errcode != EXT2_ET_UNIMPLEMENTED) {
 513                         fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
 514                         ctx->flags |= E2F_FLAG_ABORT;
 515                         return;
 516                 }
 517                 if ((pctx.errcode != EXT2_ET_UNIMPLEMENTED) &&
 518                     (ctx->num_blocks < sb->s_blocks_count)) {
 519                         pctx.blk = sb->s_blocks_count;
 520                         pctx.blk2 = ctx->num_blocks;
 521                         if (fix_problem(ctx, PR_0_FS_SIZE_WRONG, &pctx)) {
 522                                 ctx->flags |= E2F_FLAG_ABORT;
 523                                 return;
 524                         }
 525                 }
 526         }
 527
 528         if (sb->s_log_block_size != (__u32) sb->s_log_frag_size) {
 529                 pctx.blk = EXT2_BLOCK_SIZE(sb);
 530                 pctx.blk2 = EXT2_FRAG_SIZE(sb);
 531                 fix_problem(ctx, PR_0_NO_FRAGMENTS, &pctx);
 532                 ctx->flags |= E2F_FLAG_ABORT;
 533                 return;
 534         }
 535
 536         should_be = sb->s_frags_per_group >>
 537                 (sb->s_log_block_size - sb->s_log_frag_size);
 538         if (sb->s_blocks_per_group != should_be) {
 539                 pctx.blk = sb->s_blocks_per_group;
 540                 pctx.blk2 = should_be;
 541                 fix_problem(ctx, PR_0_BLOCKS_PER_GROUP, &pctx);
 542                 ctx->flags |= E2F_FLAG_ABORT;
 543                 return;
 544         }
 545
 546         should_be = (sb->s_log_block_size == 0) ? 1 : 0;
 547         if (sb->s_first_data_block != should_be) {
 548                 pctx.blk = sb->s_first_data_block;
 549                 pctx.blk2 = should_be;
 550                 fix_problem(ctx, PR_0_FIRST_DATA_BLOCK, &pctx);
 551                 ctx->flags |= E2F_FLAG_ABORT;
 552                 return;
 553         }
 554
 555         should_be = sb->s_inodes_per_group * fs->group_desc_count;
 556         if (sb->s_inodes_count != should_be) {
 557                 pctx.ino = sb->s_inodes_count;
 558                 pctx.ino2 = should_be;
 559                 if (fix_problem(ctx, PR_0_INODE_COUNT_WRONG, &pctx)) {
 560                         sb->s_inodes_count = should_be;
 561                         ext2fs_mark_super_dirty(fs);
 562                 }
 563         }
 564
 565         /*
 566          * Verify the group descriptors....
 567          */
 568         first_block =  sb->s_first_data_block;
 569         last_block = first_block + blocks_per_group;
 570
 571         for (i = 0, gd=fs->group_desc; i < fs->group_desc_count; i++, gd++) {
 572                 pctx.group = i;
 573
 574                 if (i == fs->group_desc_count - 1)
 575                         last_block = sb->s_blocks_count;
 576                 if ((gd->bg_block_bitmap < first_block) ||
 577                     (gd->bg_block_bitmap >= last_block)) {
 578                         pctx.blk = gd->bg_block_bitmap;
 579                         if (fix_problem(ctx, PR_0_BB_NOT_GROUP, &pctx))
 580                                 gd->bg_block_bitmap = 0;
 581                 }
 582                 if (gd->bg_block_bitmap == 0) {
 583                         ctx->invalid_block_bitmap_flag[i]++;
 584                         ctx->invalid_bitmaps++;
 585                 }
 586                 if ((gd->bg_inode_bitmap < first_block) ||
 587                     (gd->bg_inode_bitmap >= last_block)) {
 588                         pctx.blk = gd->bg_inode_bitmap;
 589                         if (fix_problem(ctx, PR_0_IB_NOT_GROUP, &pctx))
 590                                 gd->bg_inode_bitmap = 0;
 591                 }
 592                 if (gd->bg_inode_bitmap == 0) {
 593                         ctx->invalid_inode_bitmap_flag[i]++;
 594                         ctx->invalid_bitmaps++;
 595                 }
 596                 if ((gd->bg_inode_table < first_block) ||
 597                     ((gd->bg_inode_table +
 598                       fs->inode_blocks_per_group - 1) >= last_block)) {
 599                         pctx.blk = gd->bg_inode_table;
 600                         if (fix_problem(ctx, PR_0_ITABLE_NOT_GROUP, &pctx))
 601                                 gd->bg_inode_table = 0;
 602                 }
 603                 if (gd->bg_inode_table == 0) {
 604                         ctx->invalid_inode_table_flag[i]++;
 605                         ctx->invalid_bitmaps++;
 606                 }
 607                 free_blocks += gd->bg_free_blocks_count;
 608                 free_inodes += gd->bg_free_inodes_count;
 609                 first_block += sb->s_blocks_per_group;
 610                 last_block += sb->s_blocks_per_group;
 611
 612                 if ((gd->bg_free_blocks_count > sb->s_blocks_per_group) ||
 613                     (gd->bg_free_inodes_count > sb->s_inodes_per_group) ||
 614                     (gd->bg_used_dirs_count > sb->s_inodes_per_group))
 615                         ext2fs_unmark_valid(fs);
 616
 617         }
 618
 619         /*
 620          * Update the global counts from the block group counts.  This
 621          * is needed for an experimental patch which eliminates
 622          * locking the entire filesystem when allocating blocks or
 623          * inodes; if the filesystem is not unmounted cleanly, the
 624          * global counts may not be accurate.
 625          */
 626         if ((free_blocks != sb->s_free_blocks_count) ||
 627             (free_inodes != sb->s_free_inodes_count)) {
 628                 if (ctx->options & E2F_OPT_READONLY)
 629                         ext2fs_unmark_valid(fs);
 630                 else {
 631                         sb->s_free_blocks_count = free_blocks;
 632                         sb->s_free_inodes_count = free_inodes;
 633                         ext2fs_mark_super_dirty(fs);
 634                 }
 635         }
 636
 637         if ((sb->s_free_blocks_count > sb->s_blocks_count) ||
 638             (sb->s_free_inodes_count > sb->s_inodes_count))
 639                 ext2fs_unmark_valid(fs);
 640
 641
 642         /*
 643          * If we have invalid bitmaps, set the error state of the
 644          * filesystem.
 645          */
 646         if (ctx->invalid_bitmaps && !(ctx->options & E2F_OPT_READONLY)) {
 647                 sb->s_state &= ~EXT2_VALID_FS;
 648                 ext2fs_mark_super_dirty(fs);
 649         }
 650
 651         clear_problem_context(&pctx);
 652
 653 #ifndef EXT2_SKIP_UUID
 654         /*
 655          * If the UUID field isn't assigned, assign it.
 656          */
 657         if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(sb->s_uuid)) {
 658                 if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
 659                         uuid_generate(sb->s_uuid);
 660                         ext2fs_mark_super_dirty(fs);
 661                         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
 662                 }
 663         }
 664 #endif
 665
 666         /*
 667          * For the Hurd, check to see if the filetype option is set,
 668          * since it doesn't support it.
 669          */
 670         if (!(ctx->options & E2F_OPT_READONLY) &&
 671             fs->super->s_creator_os == EXT2_OS_HURD &&
 672             (fs->super->s_feature_incompat &
 673              EXT2_FEATURE_INCOMPAT_FILETYPE)) {
 674                 if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) {
 675                         fs->super->s_feature_incompat &=
 676                                 ~EXT2_FEATURE_INCOMPAT_FILETYPE;
 677                         ext2fs_mark_super_dirty(fs);
 678
 679                 }
 680         }
 681
 682         /*
 683          * If we have any of the compatibility flags set, we need to have a
 684          * revision 1 filesystem.  Most kernels will not check the flags on
 685          * a rev 0 filesystem and we may have corruption issues because of
 686          * the incompatible changes to the filesystem.
 687          */
 688         if (!(ctx->options & E2F_OPT_READONLY) &&
 689             fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
 690             (fs->super->s_feature_compat ||
 691              fs->super->s_feature_ro_compat ||
 692              fs->super->s_feature_incompat) &&
 693             fix_problem(ctx, PR_0_FS_REV_LEVEL, &pctx)) {
 694                 ext2fs_update_dynamic_rev(fs);
 695                 ext2fs_mark_super_dirty(fs);
 696         }
 697
 698         check_resize_inode(ctx);
 699
 700         /*
 701          * Clean up any orphan inodes, if present.
 702          */
 703         if (!(ctx->options & E2F_OPT_READONLY) && release_orphan_inodes(ctx)) {
 704                 fs->super->s_state &= ~EXT2_VALID_FS;
 705                 ext2fs_mark_super_dirty(fs);
 706         }
 707
 708         /*
 709          * Move the ext3 journal file, if necessary.
 710          */
 711         e2fsck_move_ext3_journal(ctx);
 712         return;
 713 }