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 = time(0);
 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         pctx.ino = EXT2_RESIZE_INO;
 333         retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode);
 334         if (retval) {
 335                 ctx->flags |= E2F_FLAG_RESIZE_INODE;
 336                 return;
 337         }
 338
 339         /*
 340          * If the resize inode feature isn't set, then
 341          * s_reserved_gdt_blocks must be zero, and the resize inode
 342          * must be cleared.
 343          */
 344         if (!(fs->super->s_feature_compat &
 345               EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
 346                 if (fs->super->s_reserved_gdt_blocks) {
 347                         pctx.num = fs->super->s_reserved_gdt_blocks;
 348                         if (fix_problem(ctx, PR_0_NONZERO_RESERVED_GDT_BLOCKS,
 349                                         &pctx)) {
 350                                 fs->super->s_reserved_gdt_blocks = 0;
 351                                 ext2fs_mark_super_dirty(fs);
 352                         }
 353                 }
 354                 for (i=0; i < EXT2_N_BLOCKS; i++) {
 355                         if (inode.i_block[i])
 356                                 break;
 357                 }
 358                 if ((i < EXT2_N_BLOCKS) &&
 359                     fix_problem(ctx, PR_0_CLEAR_RESIZE_INODE, &pctx)) {
 360                         memset(&inode, 0, sizeof(inode));
 361                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
 362                                            "clear_resize");
 363                 }
 364                 return;
 365         }
 366         /*
 367          * The resize inode feature is enabled; check to make sure the
 368          * only block in use is the double indirect block
 369          */
 370         blk = inode.i_block[EXT2_DIND_BLOCK];
 371         for (i=0; i < EXT2_N_BLOCKS; i++) {
 372                 if (i != EXT2_DIND_BLOCK && inode.i_block[i])
 373                         break;
 374         }
 375         if ((i < EXT2_N_BLOCKS) || !blk || !inode.i_links_count ||
 376             !(inode.i_mode & LINUX_S_IFREG) ||
 377             (blk < fs->super->s_first_data_block ||
 378              blk >= fs->super->s_blocks_count)) {
 379         resize_inode_invalid:
 380                 if (fix_problem(ctx, PR_0_RESIZE_INODE_INVALID, &pctx)) {
 381                         memset(&inode, 0, sizeof(inode));
 382                         e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
 383                                            "clear_resize");
 384                         ctx->flags |= E2F_FLAG_RESIZE_INODE;
 385                 }
 386                 if (!(ctx->options & E2F_OPT_READONLY)) {
 387                         fs->super->s_state &= ~EXT2_VALID_FS;
 388                         ext2fs_mark_super_dirty(fs);
 389                 }
 390                 goto cleanup;
 391         }
 392         dind_buf = (__u32 *) e2fsck_allocate_memory(ctx, fs->blocksize * 2,
 393                                                     "resize dind buffer");
 394         ind_buf = (__u32 *) ((char *) dind_buf + fs->blocksize);
 395
 396         retval = ext2fs_read_ind_block(fs, blk, dind_buf);
 397         if (retval)
 398                 goto resize_inode_invalid;
 399
 400         gdt_off = fs->desc_blocks;
 401         pblk = fs->super->s_first_data_block + 1 + fs->desc_blocks;
 402         for (i = 0; i < fs->super->s_reserved_gdt_blocks / 4;
 403              i++, gdt_off++, pblk++) {
 404                 gdt_off %= fs->blocksize/4;
 405                 if (dind_buf[gdt_off] != pblk)
 406                         goto resize_inode_invalid;
 407                 retval = ext2fs_read_ind_block(fs, pblk, ind_buf);
 408                 if (retval)
 409                         goto resize_inode_invalid;
 410                 ind_off = 0;
 411                 for (j = 1; j < fs->group_desc_count; j++) {
 412                         if (!ext2fs_bg_has_super(fs, j))
 413                                 continue;
 414                         expect = pblk + (j * fs->super->s_blocks_per_group);
 415                         if (ind_buf[ind_off] != expect)
 416                                 goto resize_inode_invalid;
 417                         ind_off++;
 418                 }
 419         }
 420
 421 cleanup:
 422         if (dind_buf)
 423                 ext2fs_free_mem(&dind_buf);
 424
 425  }
 426
 427 void check_super_block(e2fsck_t ctx)
 428 {
 429         ext2_filsys fs = ctx->fs;
 430         blk_t   first_block, last_block;
 431         struct ext2_super_block *sb = fs->super;
 432         struct ext2_group_desc *gd;
 433         blk_t   blocks_per_group = fs->super->s_blocks_per_group;
 434         blk_t   bpg_max;
 435         int     inodes_per_block;
 436         int     ipg_max;
 437         dgrp_t  i;
 438         blk_t   should_be;
 439         struct problem_context  pctx;
 440         __u32   free_blocks = 0, free_inodes = 0;
 441
 442         inodes_per_block = EXT2_INODES_PER_BLOCK(fs->super);
 443         ipg_max = inodes_per_block * (blocks_per_group - 4);
 444         if (ipg_max > EXT2_MAX_INODES_PER_GROUP(sb))
 445                 ipg_max = EXT2_MAX_INODES_PER_GROUP(sb);
 446         bpg_max = 8 * EXT2_BLOCK_SIZE(sb);
 447         if (bpg_max > EXT2_MAX_BLOCKS_PER_GROUP(sb))
 448                 bpg_max = EXT2_MAX_BLOCKS_PER_GROUP(sb);
 449
 450         ctx->invalid_inode_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
 451                  sizeof(int) * fs->group_desc_count, "invalid_inode_bitmap");
 452         ctx->invalid_block_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
 453                  sizeof(int) * fs->group_desc_count, "invalid_block_bitmap");
 454         ctx->invalid_inode_table_flag = (int *) e2fsck_allocate_memory(ctx,
 455                 sizeof(int) * fs->group_desc_count, "invalid_inode_table");
 456
 457         clear_problem_context(&pctx);
 458
 459         /*
 460          * Verify the super block constants...
 461          */
 462         check_super_value(ctx, "inodes_count", sb->s_inodes_count,
 463                           MIN_CHECK, 1, 0);
 464         check_super_value(ctx, "blocks_count", sb->s_blocks_count,
 465                           MIN_CHECK, 1, 0);
 466         check_super_value(ctx, "first_data_block", sb->s_first_data_block,
 467                           MAX_CHECK, 0, sb->s_blocks_count);
 468         check_super_value(ctx, "log_block_size", sb->s_log_block_size,
 469                           MIN_CHECK | MAX_CHECK, 0,
 470                           EXT2_MAX_BLOCK_LOG_SIZE - EXT2_MIN_BLOCK_LOG_SIZE);
 471         check_super_value(ctx, "log_frag_size", sb->s_log_frag_size,
 472                           MIN_CHECK | MAX_CHECK, 0, sb->s_log_block_size);
 473         check_super_value(ctx, "frags_per_group", sb->s_frags_per_group,
 474                           MIN_CHECK | MAX_CHECK, sb->s_blocks_per_group,
 475                           bpg_max);
 476         check_super_value(ctx, "blocks_per_group", sb->s_blocks_per_group,
 477                           MIN_CHECK | MAX_CHECK, 8, bpg_max);
 478         check_super_value(ctx, "inodes_per_group", sb->s_inodes_per_group,
 479                           MIN_CHECK | MAX_CHECK, inodes_per_block, ipg_max);
 480         check_super_value(ctx, "r_blocks_count", sb->s_r_blocks_count,
 481                           MAX_CHECK, 0, sb->s_blocks_count / 2);
 482         check_super_value(ctx, "reserved_gdt_blocks",
 483                           sb->s_reserved_gdt_blocks, MAX_CHECK, 0,
 484                           fs->blocksize/4);
 485
 486         if (!ctx->num_blocks) {
 487                 pctx.errcode = e2fsck_get_device_size(ctx);
 488                 if (pctx.errcode && pctx.errcode != EXT2_ET_UNIMPLEMENTED) {
 489                         fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
 490                         ctx->flags |= E2F_FLAG_ABORT;
 491                         return;
 492                 }
 493                 if ((pctx.errcode != EXT2_ET_UNIMPLEMENTED) &&
 494                     (ctx->num_blocks < sb->s_blocks_count)) {
 495                         pctx.blk = sb->s_blocks_count;
 496                         pctx.blk2 = ctx->num_blocks;
 497                         if (fix_problem(ctx, PR_0_FS_SIZE_WRONG, &pctx)) {
 498                                 ctx->flags |= E2F_FLAG_ABORT;
 499                                 return;
 500                         }
 501                 }
 502         }
 503
 504         if (sb->s_log_block_size != (__u32) sb->s_log_frag_size) {
 505                 pctx.blk = EXT2_BLOCK_SIZE(sb);
 506                 pctx.blk2 = EXT2_FRAG_SIZE(sb);
 507                 fix_problem(ctx, PR_0_NO_FRAGMENTS, &pctx);
 508                 ctx->flags |= E2F_FLAG_ABORT;
 509                 return;
 510         }
 511
 512         should_be = sb->s_frags_per_group >>
 513                 (sb->s_log_block_size - sb->s_log_frag_size);
 514         if (sb->s_blocks_per_group != should_be) {
 515                 pctx.blk = sb->s_blocks_per_group;
 516                 pctx.blk2 = should_be;
 517                 fix_problem(ctx, PR_0_BLOCKS_PER_GROUP, &pctx);
 518                 ctx->flags |= E2F_FLAG_ABORT;
 519                 return;
 520         }
 521
 522         should_be = (sb->s_log_block_size == 0) ? 1 : 0;
 523         if (sb->s_first_data_block != should_be) {
 524                 pctx.blk = sb->s_first_data_block;
 525                 pctx.blk2 = should_be;
 526                 fix_problem(ctx, PR_0_FIRST_DATA_BLOCK, &pctx);
 527                 ctx->flags |= E2F_FLAG_ABORT;
 528                 return;
 529         }
 530
 531         should_be = sb->s_inodes_per_group * fs->group_desc_count;
 532         if (sb->s_inodes_count != should_be) {
 533                 pctx.ino = sb->s_inodes_count;
 534                 pctx.ino2 = should_be;
 535                 if (fix_problem(ctx, PR_0_INODE_COUNT_WRONG, &pctx)) {
 536                         sb->s_inodes_count = should_be;
 537                         ext2fs_mark_super_dirty(fs);
 538                 }
 539         }
 540
 541         /*
 542          * Verify the group descriptors....
 543          */
 544         first_block =  sb->s_first_data_block;
 545         last_block = first_block + blocks_per_group;
 546
 547         for (i = 0, gd=fs->group_desc; i < fs->group_desc_count; i++, gd++) {
 548                 pctx.group = i;
 549
 550                 if (i == fs->group_desc_count - 1)
 551                         last_block = sb->s_blocks_count;
 552                 if ((gd->bg_block_bitmap < first_block) ||
 553                     (gd->bg_block_bitmap >= last_block)) {
 554                         pctx.blk = gd->bg_block_bitmap;
 555                         if (fix_problem(ctx, PR_0_BB_NOT_GROUP, &pctx))
 556                                 gd->bg_block_bitmap = 0;
 557                 }
 558                 if (gd->bg_block_bitmap == 0) {
 559                         ctx->invalid_block_bitmap_flag[i]++;
 560                         ctx->invalid_bitmaps++;
 561                 }
 562                 if ((gd->bg_inode_bitmap < first_block) ||
 563                     (gd->bg_inode_bitmap >= last_block)) {
 564                         pctx.blk = gd->bg_inode_bitmap;
 565                         if (fix_problem(ctx, PR_0_IB_NOT_GROUP, &pctx))
 566                                 gd->bg_inode_bitmap = 0;
 567                 }
 568                 if (gd->bg_inode_bitmap == 0) {
 569                         ctx->invalid_inode_bitmap_flag[i]++;
 570                         ctx->invalid_bitmaps++;
 571                 }
 572                 if ((gd->bg_inode_table < first_block) ||
 573                     ((gd->bg_inode_table +
 574                       fs->inode_blocks_per_group - 1) >= last_block)) {
 575                         pctx.blk = gd->bg_inode_table;
 576                         if (fix_problem(ctx, PR_0_ITABLE_NOT_GROUP, &pctx))
 577                                 gd->bg_inode_table = 0;
 578                 }
 579                 if (gd->bg_inode_table == 0) {
 580                         ctx->invalid_inode_table_flag[i]++;
 581                         ctx->invalid_bitmaps++;
 582                 }
 583                 free_blocks += gd->bg_free_blocks_count;
 584                 free_inodes += gd->bg_free_inodes_count;
 585                 first_block += sb->s_blocks_per_group;
 586                 last_block += sb->s_blocks_per_group;
 587
 588                 if ((gd->bg_free_blocks_count > sb->s_blocks_per_group) ||
 589                     (gd->bg_free_inodes_count > sb->s_inodes_per_group) ||
 590                     (gd->bg_used_dirs_count > sb->s_inodes_per_group))
 591                         ext2fs_unmark_valid(fs);
 592
 593         }
 594
 595         /*
 596          * Update the global counts from the block group counts.  This
 597          * is needed for an experimental patch which eliminates
 598          * locking the entire filesystem when allocating blocks or
 599          * inodes; if the filesystem is not unmounted cleanly, the
 600          * global counts may not be accurate.
 601          */
 602         if ((free_blocks != sb->s_free_blocks_count) ||
 603             (free_inodes != sb->s_free_inodes_count)) {
 604                 if (ctx->options & E2F_OPT_READONLY)
 605                         ext2fs_unmark_valid(fs);
 606                 else {
 607                         sb->s_free_blocks_count = free_blocks;
 608                         sb->s_free_inodes_count = free_inodes;
 609                         ext2fs_mark_super_dirty(fs);
 610                 }
 611         }
 612
 613         if ((sb->s_free_blocks_count > sb->s_blocks_count) ||
 614             (sb->s_free_inodes_count > sb->s_inodes_count))
 615                 ext2fs_unmark_valid(fs);
 616
 617
 618         /*
 619          * If we have invalid bitmaps, set the error state of the
 620          * filesystem.
 621          */
 622         if (ctx->invalid_bitmaps && !(ctx->options & E2F_OPT_READONLY)) {
 623                 sb->s_state &= ~EXT2_VALID_FS;
 624                 ext2fs_mark_super_dirty(fs);
 625         }
 626
 627         clear_problem_context(&pctx);
 628
 629 #ifndef EXT2_SKIP_UUID
 630         /*
 631          * If the UUID field isn't assigned, assign it.
 632          */
 633         if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(sb->s_uuid)) {
 634                 if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
 635                         uuid_generate(sb->s_uuid);
 636                         ext2fs_mark_super_dirty(fs);
 637                         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
 638                 }
 639         }
 640 #endif
 641
 642         /*
 643          * For the Hurd, check to see if the filetype option is set,
 644          * since it doesn't support it.
 645          */
 646         if (!(ctx->options & E2F_OPT_READONLY) &&
 647             fs->super->s_creator_os == EXT2_OS_HURD &&
 648             (fs->super->s_feature_incompat &
 649              EXT2_FEATURE_INCOMPAT_FILETYPE)) {
 650                 if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) {
 651                         fs->super->s_feature_incompat &=
 652                                 ~EXT2_FEATURE_INCOMPAT_FILETYPE;
 653                         ext2fs_mark_super_dirty(fs);
 654
 655                 }
 656         }
 657
 658         /*
 659          * If we have any of the compatibility flags set, we need to have a
 660          * revision 1 filesystem.  Most kernels will not check the flags on
 661          * a rev 0 filesystem and we may have corruption issues because of
 662          * the incompatible changes to the filesystem.
 663          */
 664         if (!(ctx->options & E2F_OPT_READONLY) &&
 665             fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
 666             (fs->super->s_feature_compat ||
 667              fs->super->s_feature_ro_compat ||
 668              fs->super->s_feature_incompat) &&
 669             fix_problem(ctx, PR_0_FS_REV_LEVEL, &pctx)) {
 670                 ext2fs_update_dynamic_rev(fs);
 671                 ext2fs_mark_super_dirty(fs);
 672         }
 673
 674         check_resize_inode(ctx);
 675
 676         /*
 677          * Clean up any orphan inodes, if present.
 678          */
 679         if (!(ctx->options & E2F_OPT_READONLY) && release_orphan_inodes(ctx)) {
 680                 fs->super->s_state &= ~EXT2_VALID_FS;
 681                 ext2fs_mark_super_dirty(fs);
 682         }
 683
 684         /*
 685          * Move the ext3 journal file, if necessary.
 686          */
 687         e2fsck_move_ext3_journal(ctx);
 688         return;
 689 }