e2fsck/pass5.c

   1 /*
   2  * pass5.c --- check block and inode bitmaps against on-disk bitmaps
   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
  13 #include "config.h"
  14 #include <stdint.h>
  15 #include <sys/types.h>
  16 #include <sys/stat.h>
  17 #include <sys/ioctl.h>
  18 #include <fcntl.h>
  19 #include <errno.h>
  20
  21 #include "e2fsck.h"
  22 #include "problem.h"
  23
  24 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
  25
  26 static void check_block_bitmaps(e2fsck_t ctx);
  27 static void check_inode_bitmaps(e2fsck_t ctx);
  28 static void check_inode_end(e2fsck_t ctx);
  29 static void check_block_end(e2fsck_t ctx);
  30
  31 void e2fsck_pass5(e2fsck_t ctx)
  32 {
  33 #ifdef RESOURCE_TRACK
  34         struct resource_track   rtrack;
  35 #endif
  36         struct problem_context  pctx;
  37
  38 #ifdef MTRACE
  39         mtrace_print("Pass 5");
  40 #endif
  41
  42         init_resource_track(&rtrack, ctx->fs->io);
  43         clear_problem_context(&pctx);
  44
  45         if (!(ctx->options & E2F_OPT_PREEN))
  46                 fix_problem(ctx, PR_5_PASS_HEADER, &pctx);
  47
  48         if (ctx->progress)
  49                 if ((ctx->progress)(ctx, 5, 0, ctx->fs->group_desc_count*2))
  50                         return;
  51
  52         e2fsck_read_bitmaps(ctx);
  53
  54         check_block_bitmaps(ctx);
  55         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
  56                 return;
  57         check_inode_bitmaps(ctx);
  58         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
  59                 return;
  60         check_inode_end(ctx);
  61         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
  62                 return;
  63         check_block_end(ctx);
  64         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
  65                 return;
  66
  67         ext2fs_free_inode_bitmap(ctx->inode_used_map);
  68         ctx->inode_used_map = 0;
  69         ext2fs_free_inode_bitmap(ctx->inode_dir_map);
  70         ctx->inode_dir_map = 0;
  71         ext2fs_free_block_bitmap(ctx->block_found_map);
  72         ctx->block_found_map = 0;
  73
  74         print_resource_track(ctx, _("Pass 5"), &rtrack, ctx->fs->io);
  75 }
  76
  77 static void e2fsck_discard_blocks(e2fsck_t ctx, blk64_t start,
  78                                   blk64_t count)
  79 {
  80         ext2_filsys fs = ctx->fs;
  81
  82         /*
  83          * If the filesystem has changed it means that there was an corruption
  84          * which should be repaired, but in some cases just one e2fsck run is
  85          * not enough to fix the problem, hence it is not safe to run discard
  86          * in this case.
  87          */
  88         if (ext2fs_test_changed(fs))
  89                 ctx->options &= ~E2F_OPT_DISCARD;
  90
  91         if ((ctx->options & E2F_OPT_DISCARD) &&
  92             (io_channel_discard(fs->io, start, count)))
  93                 ctx->options &= ~E2F_OPT_DISCARD;
  94 }
  95
  96 /*
  97  * This will try to discard number 'count' inodes starting at
  98  * inode number 'start' within the 'group'. Note that 'start'
  99  * is 1-based, it means that we need to adjust it by -1 in this
 100  * function to compute right offset in the particular inode table.
 101  */
 102 static void e2fsck_discard_inodes(e2fsck_t ctx, dgrp_t group,
 103                                   ext2_ino_t start, int count)
 104 {
 105         ext2_filsys fs = ctx->fs;
 106         blk64_t blk, num;
 107
 108         /*
 109          * Sanity check for 'start'
 110          */
 111         if ((start < 1) || (start > EXT2_INODES_PER_GROUP(fs->super))) {
 112                 printf("PROGRAMMING ERROR: Got start %d outside of group %d!"
 113                        " Disabling discard\n",
 114                         start, group);
 115                 ctx->options &= ~E2F_OPT_DISCARD;
 116         }
 117
 118         /*
 119          * Do not attempt to discard if E2F_OPT_DISCARD is not set. And also
 120          * skip the discard on this group if discard does not zero data.
 121          * The reason is that if the inode table is not zeroed discard would
 122          * no help us since we need to zero it anyway, or if the inode table
 123          * is zeroed then the read after discard would not be deterministic
 124          * anyway and we would not be able to assume that this inode table
 125          * was zeroed anymore so we would have to zero it again, which does
 126          * not really make sense.
 127          */
 128         if (!(ctx->options & E2F_OPT_DISCARD) ||
 129             !io_channel_discard_zeroes_data(fs->io))
 130                 return;
 131
 132         /*
 133          * Start is inode number within the group which starts
 134          * counting from 1, so we need to adjust it.
 135          */
 136         start -= 1;
 137
 138         /*
 139          * We can discard only blocks containing only unused
 140          * inodes in the table.
 141          */
 142         blk = DIV_ROUND_UP(start,
 143                 EXT2_INODES_PER_BLOCK(fs->super));
 144         count -= (blk * EXT2_INODES_PER_BLOCK(fs->super) - start);
 145         blk += ext2fs_inode_table_loc(fs, group);
 146         num = count / EXT2_INODES_PER_BLOCK(fs->super);
 147
 148         if (num > 0)
 149                 e2fsck_discard_blocks(ctx, blk, num);
 150 }
 151
 152 #define NO_BLK ((blk64_t) -1)
 153
 154 static void print_bitmap_problem(e2fsck_t ctx, problem_t problem,
 155                             struct problem_context *pctx)
 156 {
 157         switch (problem) {
 158         case PR_5_BLOCK_UNUSED:
 159                 if (pctx->blk == pctx->blk2)
 160                         pctx->blk2 = 0;
 161                 else
 162                         problem = PR_5_BLOCK_RANGE_UNUSED;
 163                 break;
 164         case PR_5_BLOCK_USED:
 165                 if (pctx->blk == pctx->blk2)
 166                         pctx->blk2 = 0;
 167                 else
 168                         problem = PR_5_BLOCK_RANGE_USED;
 169                 break;
 170         case PR_5_INODE_UNUSED:
 171                 if (pctx->ino == pctx->ino2)
 172                         pctx->ino2 = 0;
 173                 else
 174                         problem = PR_5_INODE_RANGE_UNUSED;
 175                 break;
 176         case PR_5_INODE_USED:
 177                 if (pctx->ino == pctx->ino2)
 178                         pctx->ino2 = 0;
 179                 else
 180                         problem = PR_5_INODE_RANGE_USED;
 181                 break;
 182         }
 183         fix_problem(ctx, problem, pctx);
 184         pctx->blk = pctx->blk2 = NO_BLK;
 185         pctx->ino = pctx->ino2 = 0;
 186 }
 187
 188 /* Just to be more succint */
 189 #define B2C(x)  EXT2FS_B2C(fs, (x))
 190 #define EQ_CLSTR(x, y) (B2C(x) == B2C(y))
 191 #define LE_CLSTR(x, y) (B2C(x) <= B2C(y))
 192 #define GE_CLSTR(x, y) (B2C(x) >= B2C(y))
 193
 194 static void check_block_bitmaps(e2fsck_t ctx)
 195 {
 196         ext2_filsys fs = ctx->fs;
 197         blk64_t i;
 198         unsigned int    *free_array;
 199         dgrp_t          g, group = 0;
 200         unsigned int    blocks = 0;
 201         blk64_t free_blocks = 0;
 202         blk64_t first_free = ext2fs_blocks_count(fs->super);
 203         unsigned int    group_free = 0;
 204         int     actual, bitmap;
 205         struct problem_context  pctx;
 206         problem_t       problem, save_problem;
 207         int             fixit, had_problem;
 208         errcode_t       retval;
 209         int             csum_flag;
 210         int     old_desc_blocks = 0;
 211         int     count = 0;
 212         int     cmp_block = 0;
 213         int     redo_flag = 0;
 214         blk64_t super_blk, old_desc_blk, new_desc_blk;
 215         char *actual_buf, *bitmap_buf;
 216
 217         actual_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize,
 218                                                      "actual bitmap buffer");
 219         bitmap_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize,
 220                                                      "bitmap block buffer");
 221
 222         clear_problem_context(&pctx);
 223         free_array = (unsigned int *) e2fsck_allocate_memory(ctx,
 224             fs->group_desc_count * sizeof(unsigned int), "free block count array");
 225
 226         if ((B2C(fs->super->s_first_data_block) <
 227              ext2fs_get_block_bitmap_start2(ctx->block_found_map)) ||
 228             (B2C(ext2fs_blocks_count(fs->super)-1) >
 229              ext2fs_get_block_bitmap_end2(ctx->block_found_map))) {
 230                 pctx.num = 1;
 231                 pctx.blk = B2C(fs->super->s_first_data_block);
 232                 pctx.blk2 = B2C(ext2fs_blocks_count(fs->super) - 1);
 233                 pctx.ino = ext2fs_get_block_bitmap_start2(ctx->block_found_map);
 234                 pctx.ino2 = ext2fs_get_block_bitmap_end2(ctx->block_found_map);
 235                 fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
 236
 237                 ctx->flags |= E2F_FLAG_ABORT; /* fatal */
 238                 goto errout;
 239         }
 240
 241         if ((B2C(fs->super->s_first_data_block) <
 242              ext2fs_get_block_bitmap_start2(fs->block_map)) ||
 243             (B2C(ext2fs_blocks_count(fs->super)-1) >
 244              ext2fs_get_block_bitmap_end2(fs->block_map))) {
 245                 pctx.num = 2;
 246                 pctx.blk = B2C(fs->super->s_first_data_block);
 247                 pctx.blk2 = B2C(ext2fs_blocks_count(fs->super) - 1);
 248                 pctx.ino = ext2fs_get_block_bitmap_start2(fs->block_map);
 249                 pctx.ino2 = ext2fs_get_block_bitmap_end2(fs->block_map);
 250                 fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
 251
 252                 ctx->flags |= E2F_FLAG_ABORT; /* fatal */
 253                 goto errout;
 254         }
 255
 256         csum_flag = EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
 257                                                EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
 258 redo_counts:
 259         had_problem = 0;
 260         save_problem = 0;
 261         pctx.blk = pctx.blk2 = NO_BLK;
 262         for (i = B2C(fs->super->s_first_data_block);
 263              i < ext2fs_blocks_count(fs->super);
 264              i += EXT2FS_CLUSTER_RATIO(fs)) {
 265                 int first_block_in_bg = (B2C(i) -
 266                                          B2C(fs->super->s_first_data_block)) %
 267                         fs->super->s_clusters_per_group == 0;
 268                 int n, nbytes = fs->super->s_clusters_per_group / 8;
 269
 270                 actual = ext2fs_fast_test_block_bitmap2(ctx->block_found_map, i);
 271
 272                 /*
 273                  * Try to optimize pass5 by extracting a bitmap block
 274                  * as expected from what we have on disk, and then
 275                  * comparing the two.  If they are identical, then
 276                  * update the free block counts and go on to the next
 277                  * block group.  This is much faster than doing the
 278                  * individual bit-by-bit comparison.  The one downside
 279                  * is that this doesn't work if we are asking e2fsck
 280                  * to do a discard operation.
 281                  */
 282                 if (!first_block_in_bg ||
 283                     (group == (int)fs->group_desc_count - 1) ||
 284                     (ctx->options & E2F_OPT_DISCARD))
 285                         goto no_optimize;
 286
 287                 retval = ext2fs_get_block_bitmap_range2(ctx->block_found_map,
 288                                 B2C(i), fs->super->s_clusters_per_group,
 289                                 actual_buf);
 290                 if (retval)
 291                         goto no_optimize;
 292                 retval = ext2fs_get_block_bitmap_range2(fs->block_map,
 293                                 B2C(i), fs->super->s_clusters_per_group,
 294                                 bitmap_buf);
 295                 if (retval)
 296                         goto no_optimize;
 297                 if (memcmp(actual_buf, bitmap_buf, nbytes) != 0)
 298                         goto no_optimize;
 299                 n = ext2fs_bitcount(actual_buf, nbytes);
 300                 group_free = fs->super->s_clusters_per_group - n;
 301                 free_blocks += group_free;
 302                 i += EXT2FS_C2B(fs, fs->super->s_clusters_per_group - 1);
 303                 goto next_group;
 304         no_optimize:
 305
 306                 if (redo_flag)
 307                         bitmap = actual;
 308                 else
 309                         bitmap = ext2fs_fast_test_block_bitmap2(fs->block_map, i);
 310
 311                 if (!actual == !bitmap)
 312                         goto do_counts;
 313
 314                 if (!actual && bitmap) {
 315                         /*
 316                          * Block not used, but marked in use in the bitmap.
 317                          */
 318                         problem = PR_5_BLOCK_UNUSED;
 319                 } else {
 320                         /*
 321                          * Block used, but not marked in use in the bitmap.
 322                          */
 323                         problem = PR_5_BLOCK_USED;
 324
 325                         if (ext2fs_bg_flags_test(fs, group,
 326                                                  EXT2_BG_BLOCK_UNINIT)) {
 327                                 struct problem_context pctx2;
 328                                 pctx2.blk = i;
 329                                 pctx2.group = group;
 330                                 if (fix_problem(ctx, PR_5_BLOCK_UNINIT,
 331                                                 &pctx2))
 332                                         ext2fs_bg_flags_clear(fs, group,
 333                                                         EXT2_BG_BLOCK_UNINIT);
 334                         }
 335                 }
 336                 if (pctx.blk == NO_BLK) {
 337                         pctx.blk = pctx.blk2 = i;
 338                         save_problem = problem;
 339                 } else {
 340                         if ((problem == save_problem) &&
 341                             (pctx.blk2 == i - EXT2FS_CLUSTER_RATIO(fs)))
 342                                 pctx.blk2 += EXT2FS_CLUSTER_RATIO(fs);
 343                         else {
 344                                 print_bitmap_problem(ctx, save_problem, &pctx);
 345                                 pctx.blk = pctx.blk2 = i;
 346                                 save_problem = problem;
 347                         }
 348                 }
 349                 ctx->flags |= E2F_FLAG_PROG_SUPPRESS;
 350                 had_problem++;
 351
 352                 /*
 353                  * If there a problem we should turn off the discard so we
 354                  * do not compromise the filesystem.
 355                  */
 356                 ctx->options &= ~E2F_OPT_DISCARD;
 357
 358         do_counts:
 359                 if (!bitmap) {
 360                         group_free++;
 361                         free_blocks++;
 362                         if (first_free > i)
 363                                 first_free = i;
 364                 } else if (i > first_free) {
 365                         e2fsck_discard_blocks(ctx, first_free,
 366                                               (i - first_free));
 367                         first_free = ext2fs_blocks_count(fs->super);
 368                 }
 369                 blocks ++;
 370                 if ((blocks == fs->super->s_clusters_per_group) ||
 371                     (EXT2FS_B2C(fs, i) ==
 372                      EXT2FS_B2C(fs, ext2fs_blocks_count(fs->super)-1))) {
 373                         /*
 374                          * If the last block of this group is free, then we can
 375                          * discard it as well.
 376                          */
 377                         if (!bitmap && i >= first_free)
 378                                 e2fsck_discard_blocks(ctx, first_free,
 379                                                       (i - first_free) + 1);
 380                 next_group:
 381                         first_free = ext2fs_blocks_count(fs->super);
 382
 383                         free_array[group] = group_free;
 384                         group ++;
 385                         blocks = 0;
 386                         group_free = 0;
 387                         if (ctx->progress)
 388                                 if ((ctx->progress)(ctx, 5, group,
 389                                                     fs->group_desc_count*2))
 390                                         goto errout;
 391                 }
 392         }
 393         if (pctx.blk != NO_BLK)
 394                 print_bitmap_problem(ctx, save_problem, &pctx);
 395         if (had_problem)
 396                 fixit = end_problem_latch(ctx, PR_LATCH_BBITMAP);
 397         else
 398                 fixit = -1;
 399         ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS;
 400
 401         if (fixit == 1) {
 402                 ext2fs_free_block_bitmap(fs->block_map);
 403                 retval = ext2fs_copy_bitmap(ctx->block_found_map,
 404                                                   &fs->block_map);
 405                 if (retval) {
 406                         clear_problem_context(&pctx);
 407                         fix_problem(ctx, PR_5_COPY_BBITMAP_ERROR, &pctx);
 408                         ctx->flags |= E2F_FLAG_ABORT;
 409                         goto errout;
 410                 }
 411                 ext2fs_set_bitmap_padding(fs->block_map);
 412                 ext2fs_mark_bb_dirty(fs);
 413
 414                 /* Redo the counts */
 415                 blocks = 0; free_blocks = 0; group_free = 0; group = 0;
 416                 memset(free_array, 0, fs->group_desc_count * sizeof(int));
 417                 redo_flag++;
 418                 goto redo_counts;
 419         } else if (fixit == 0)
 420                 ext2fs_unmark_valid(fs);
 421
 422         for (g = 0; g < fs->group_desc_count; g++) {
 423                 if (free_array[g] != ext2fs_bg_free_blocks_count(fs, g)) {
 424                         pctx.group = g;
 425                         pctx.blk = ext2fs_bg_free_blocks_count(fs, g);
 426                         pctx.blk2 = free_array[g];
 427
 428                         if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT_GROUP,
 429                                         &pctx)) {
 430                                 ext2fs_bg_free_blocks_count_set(fs, g, free_array[g]);
 431                                 ext2fs_mark_super_dirty(fs);
 432                         } else
 433                                 ext2fs_unmark_valid(fs);
 434                 }
 435         }
 436         free_blocks = EXT2FS_C2B(fs, free_blocks);
 437         if (free_blocks != ext2fs_free_blocks_count(fs->super)) {
 438                 pctx.group = 0;
 439                 pctx.blk = ext2fs_free_blocks_count(fs->super);
 440                 pctx.blk2 = free_blocks;
 441
 442                 if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT, &pctx)) {
 443                         ext2fs_free_blocks_count_set(fs->super, free_blocks);
 444                         ext2fs_mark_super_dirty(fs);
 445                 }
 446         }
 447 errout:
 448         ext2fs_free_mem(&free_array);
 449         ext2fs_free_mem(&actual_buf);
 450         ext2fs_free_mem(&bitmap_buf);
 451 }
 452
 453 static void check_inode_bitmaps(e2fsck_t ctx)
 454 {
 455         ext2_filsys fs = ctx->fs;
 456         ext2_ino_t      i;
 457         unsigned int    free_inodes = 0;
 458         int             group_free = 0;
 459         int             dirs_count = 0;
 460         dgrp_t          group = 0;
 461         unsigned int    inodes = 0;
 462         ext2_ino_t      *free_array;
 463         ext2_ino_t      *dir_array;
 464         int             actual, bitmap;
 465         errcode_t       retval;
 466         struct problem_context  pctx;
 467         problem_t       problem, save_problem;
 468         int             fixit, had_problem;
 469         int             csum_flag;
 470         int             skip_group = 0;
 471         int             redo_flag = 0;
 472         ext2_ino_t              first_free = fs->super->s_inodes_per_group + 1;
 473
 474         clear_problem_context(&pctx);
 475         free_array = (ext2_ino_t *) e2fsck_allocate_memory(ctx,
 476             fs->group_desc_count * sizeof(ext2_ino_t), "free inode count array");
 477
 478         dir_array = (ext2_ino_t *) e2fsck_allocate_memory(ctx,
 479            fs->group_desc_count * sizeof(ext2_ino_t), "directory count array");
 480
 481         if ((1 < ext2fs_get_inode_bitmap_start2(ctx->inode_used_map)) ||
 482             (fs->super->s_inodes_count >
 483              ext2fs_get_inode_bitmap_end2(ctx->inode_used_map))) {
 484                 pctx.num = 3;
 485                 pctx.blk = 1;
 486                 pctx.blk2 = fs->super->s_inodes_count;
 487                 pctx.ino = ext2fs_get_inode_bitmap_start2(ctx->inode_used_map);
 488                 pctx.ino2 = ext2fs_get_inode_bitmap_end2(ctx->inode_used_map);
 489                 fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
 490
 491                 ctx->flags |= E2F_FLAG_ABORT; /* fatal */
 492                 goto errout;
 493         }
 494         if ((1 < ext2fs_get_inode_bitmap_start2(fs->inode_map)) ||
 495             (fs->super->s_inodes_count >
 496              ext2fs_get_inode_bitmap_end2(fs->inode_map))) {
 497                 pctx.num = 4;
 498                 pctx.blk = 1;
 499                 pctx.blk2 = fs->super->s_inodes_count;
 500                 pctx.ino = ext2fs_get_inode_bitmap_start2(fs->inode_map);
 501                 pctx.ino2 = ext2fs_get_inode_bitmap_end2(fs->inode_map);
 502                 fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
 503
 504                 ctx->flags |= E2F_FLAG_ABORT; /* fatal */
 505                 goto errout;
 506         }
 507
 508         csum_flag = EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
 509                                                EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
 510 redo_counts:
 511         had_problem = 0;
 512         save_problem = 0;
 513         pctx.ino = pctx.ino2 = 0;
 514         if (csum_flag &&
 515             (ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT)))
 516                 skip_group++;
 517
 518         /* Protect loop from wrap-around if inodes_count is maxed */
 519         for (i = 1; i <= fs->super->s_inodes_count && i > 0; i++) {
 520                 bitmap = 0;
 521                 if (skip_group &&
 522                     i % fs->super->s_inodes_per_group == 1) {
 523                         /*
 524                          * Current inode is the first inode
 525                          * in the current block group.
 526                          */
 527                         if (ext2fs_test_inode_bitmap_range(
 528                                     ctx->inode_used_map, i,
 529                                     fs->super->s_inodes_per_group)) {
 530                                 /*
 531                                  * When the compared inodes in inodes bitmap
 532                                  * are 0, count the free inode,
 533                                  * skip the current block group.
 534                                  */
 535                                 first_free = 1;
 536                                 inodes = fs->super->s_inodes_per_group - 1;
 537                                 group_free = inodes;
 538                                 free_inodes += inodes;
 539                                 i += inodes;
 540                                 skip_group = 0;
 541                                 goto do_counts;
 542                         }
 543                 }
 544
 545                 actual = ext2fs_fast_test_inode_bitmap2(ctx->inode_used_map, i);
 546                 if (redo_flag)
 547                         bitmap = actual;
 548                 else if (!skip_group)
 549                         bitmap = ext2fs_fast_test_inode_bitmap2(fs->inode_map, i);
 550                 if (!actual == !bitmap)
 551                         goto do_counts;
 552
 553                 if (!actual && bitmap) {
 554                         /*
 555                          * Inode wasn't used, but marked in bitmap
 556                          */
 557                         problem = PR_5_INODE_UNUSED;
 558                 } else /* if (actual && !bitmap) */ {
 559                         /*
 560                          * Inode used, but not in bitmap
 561                          */
 562                         problem = PR_5_INODE_USED;
 563
 564                         /* We should never hit this, because it means that
 565                          * inodes were marked in use that weren't noticed
 566                          * in pass1 or pass 2. It is easier to fix the problem
 567                          * than to kill e2fsck and leave the user stuck. */
 568                         if (skip_group) {
 569                                 struct problem_context pctx2;
 570                                 pctx2.blk = i;
 571                                 pctx2.group = group;
 572                                 if (fix_problem(ctx, PR_5_INODE_UNINIT,&pctx2)){
 573                                         ext2fs_bg_flags_clear(fs, group, EXT2_BG_INODE_UNINIT);
 574                                         skip_group = 0;
 575                                 }
 576                         }
 577                 }
 578                 if (pctx.ino == 0) {
 579                         pctx.ino = pctx.ino2 = i;
 580                         save_problem = problem;
 581                 } else {
 582                         if ((problem == save_problem) &&
 583                             (pctx.ino2 == i-1))
 584                                 pctx.ino2++;
 585                         else {
 586                                 print_bitmap_problem(ctx, save_problem, &pctx);
 587                                 pctx.ino = pctx.ino2 = i;
 588                                 save_problem = problem;
 589                         }
 590                 }
 591                 ctx->flags |= E2F_FLAG_PROG_SUPPRESS;
 592                 had_problem++;
 593                 /*
 594                  * If there a problem we should turn off the discard so we
 595                  * do not compromise the filesystem.
 596                  */
 597                 ctx->options &= ~E2F_OPT_DISCARD;
 598
 599 do_counts:
 600                 inodes++;
 601                 if (bitmap) {
 602                         if (ext2fs_test_inode_bitmap2(ctx->inode_dir_map, i))
 603                                 dirs_count++;
 604                         if (inodes > first_free) {
 605                                 e2fsck_discard_inodes(ctx, group, first_free,
 606                                                       inodes - first_free);
 607                                 first_free = fs->super->s_inodes_per_group + 1;
 608                         }
 609                 } else {
 610                         group_free++;
 611                         free_inodes++;
 612                         if (first_free > inodes)
 613                                 first_free = inodes;
 614                 }
 615
 616                 if ((inodes == fs->super->s_inodes_per_group) ||
 617                     (i == fs->super->s_inodes_count)) {
 618                         /*
 619                          * If the last inode is free, we can discard it as well.
 620                          */
 621                         if (!bitmap && inodes >= first_free)
 622                                 e2fsck_discard_inodes(ctx, group, first_free,
 623                                                       inodes - first_free + 1);
 624                         /*
 625                          * If discard zeroes data and the group inode table
 626                          * was not zeroed yet, set itable as zeroed
 627                          */
 628                         if ((ctx->options & E2F_OPT_DISCARD) &&
 629                             io_channel_discard_zeroes_data(fs->io) &&
 630                             !(ext2fs_bg_flags_test(fs, group,
 631                                                    EXT2_BG_INODE_ZEROED))) {
 632                                 ext2fs_bg_flags_set(fs, group,
 633                                                     EXT2_BG_INODE_ZEROED);
 634                                 ext2fs_group_desc_csum_set(fs, group);
 635                         }
 636
 637                         first_free = fs->super->s_inodes_per_group + 1;
 638                         free_array[group] = group_free;
 639                         dir_array[group] = dirs_count;
 640                         group ++;
 641                         inodes = 0;
 642                         skip_group = 0;
 643                         group_free = 0;
 644                         dirs_count = 0;
 645                         if (ctx->progress)
 646                                 if ((ctx->progress)(ctx, 5,
 647                                             group + fs->group_desc_count,
 648                                             fs->group_desc_count*2))
 649                                         goto errout;
 650                         if (csum_flag &&
 651                             (i != fs->super->s_inodes_count) &&
 652                             (ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT)
 653                              ))
 654                                 skip_group++;
 655                 }
 656         }
 657         if (pctx.ino)
 658                 print_bitmap_problem(ctx, save_problem, &pctx);
 659
 660         if (had_problem)
 661                 fixit = end_problem_latch(ctx, PR_LATCH_IBITMAP);
 662         else
 663                 fixit = -1;
 664         ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS;
 665
 666         if (fixit == 1) {
 667                 ext2fs_free_inode_bitmap(fs->inode_map);
 668                 retval = ext2fs_copy_bitmap(ctx->inode_used_map,
 669                                                   &fs->inode_map);
 670                 if (retval) {
 671                         clear_problem_context(&pctx);
 672                         fix_problem(ctx, PR_5_COPY_IBITMAP_ERROR, &pctx);
 673                         ctx->flags |= E2F_FLAG_ABORT;
 674                         goto errout;
 675                 }
 676                 ext2fs_set_bitmap_padding(fs->inode_map);
 677                 ext2fs_mark_ib_dirty(fs);
 678
 679                 /* redo counts */
 680                 inodes = 0; free_inodes = 0; group_free = 0;
 681                 dirs_count = 0; group = 0;
 682                 memset(free_array, 0, fs->group_desc_count * sizeof(int));
 683                 memset(dir_array, 0, fs->group_desc_count * sizeof(int));
 684                 redo_flag++;
 685                 goto redo_counts;
 686         } else if (fixit == 0)
 687                 ext2fs_unmark_valid(fs);
 688
 689         for (i = 0; i < fs->group_desc_count; i++) {
 690                 if (free_array[i] != ext2fs_bg_free_inodes_count(fs, i)) {
 691                         pctx.group = i;
 692                         pctx.ino = ext2fs_bg_free_inodes_count(fs, i);
 693                         pctx.ino2 = free_array[i];
 694                         if (fix_problem(ctx, PR_5_FREE_INODE_COUNT_GROUP,
 695                                         &pctx)) {
 696                                 ext2fs_bg_free_inodes_count_set(fs, i, free_array[i]);
 697                                 ext2fs_mark_super_dirty(fs);
 698                         } else
 699                                 ext2fs_unmark_valid(fs);
 700                 }
 701                 if (dir_array[i] != ext2fs_bg_used_dirs_count(fs, i)) {
 702                         pctx.group = i;
 703                         pctx.ino = ext2fs_bg_used_dirs_count(fs, i);
 704                         pctx.ino2 = dir_array[i];
 705
 706                         if (fix_problem(ctx, PR_5_FREE_DIR_COUNT_GROUP,
 707                                         &pctx)) {
 708                                 ext2fs_bg_used_dirs_count_set(fs, i, dir_array[i]);
 709                                 ext2fs_mark_super_dirty(fs);
 710                         } else
 711                                 ext2fs_unmark_valid(fs);
 712                 }
 713         }
 714         if (free_inodes != fs->super->s_free_inodes_count) {
 715                 pctx.group = -1;
 716                 pctx.ino = fs->super->s_free_inodes_count;
 717                 pctx.ino2 = free_inodes;
 718
 719                 if (fix_problem(ctx, PR_5_FREE_INODE_COUNT, &pctx)) {
 720                         fs->super->s_free_inodes_count = free_inodes;
 721                         ext2fs_mark_super_dirty(fs);
 722                 }
 723         }
 724 errout:
 725         ext2fs_free_mem(&free_array);
 726         ext2fs_free_mem(&dir_array);
 727 }
 728
 729 static void check_inode_end(e2fsck_t ctx)
 730 {
 731         ext2_filsys fs = ctx->fs;
 732         ext2_ino_t      end, save_inodes_count, i;
 733         struct problem_context  pctx;
 734
 735         clear_problem_context(&pctx);
 736
 737         end = EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count;
 738         pctx.errcode = ext2fs_fudge_inode_bitmap_end(fs->inode_map, end,
 739                                                      &save_inodes_count);
 740         if (pctx.errcode) {
 741                 pctx.num = 1;
 742                 fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx);
 743                 ctx->flags |= E2F_FLAG_ABORT; /* fatal */
 744                 return;
 745         }
 746         if (save_inodes_count == end)
 747                 return;
 748
 749         /* protect loop from wrap-around if end is maxed */
 750         for (i = save_inodes_count + 1; i <= end && i > save_inodes_count; i++) {
 751                 if (!ext2fs_test_inode_bitmap(fs->inode_map, i)) {
 752                         if (fix_problem(ctx, PR_5_INODE_BMAP_PADDING, &pctx)) {
 753                                 for (; i <= end; i++)
 754                                         ext2fs_mark_inode_bitmap(fs->inode_map,
 755                                                                  i);
 756                                 ext2fs_mark_ib_dirty(fs);
 757                         } else
 758                                 ext2fs_unmark_valid(fs);
 759                         break;
 760                 }
 761         }
 762
 763         pctx.errcode = ext2fs_fudge_inode_bitmap_end(fs->inode_map,
 764                                                      save_inodes_count, 0);
 765         if (pctx.errcode) {
 766                 pctx.num = 2;
 767                 fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx);
 768                 ctx->flags |= E2F_FLAG_ABORT; /* fatal */
 769                 return;
 770         }
 771 }
 772
 773 static void check_block_end(e2fsck_t ctx)
 774 {
 775         ext2_filsys fs = ctx->fs;
 776         blk64_t end, save_blocks_count, i;
 777         struct problem_context  pctx;
 778
 779         clear_problem_context(&pctx);
 780
 781         end = ext2fs_get_block_bitmap_start2(fs->block_map) +
 782                 ((blk64_t)EXT2_CLUSTERS_PER_GROUP(fs->super) * fs->group_desc_count) - 1;
 783         pctx.errcode = ext2fs_fudge_block_bitmap_end2(fs->block_map, end,
 784                                                      &save_blocks_count);
 785         if (pctx.errcode) {
 786                 pctx.num = 3;
 787                 fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx);
 788                 ctx->flags |= E2F_FLAG_ABORT; /* fatal */
 789                 return;
 790         }
 791         if (save_blocks_count == end)
 792                 return;
 793
 794         /* Protect loop from wrap-around if end is maxed */
 795         for (i = save_blocks_count + 1; i <= end && i > save_blocks_count; i++) {
 796                 if (!ext2fs_test_block_bitmap2(fs->block_map,
 797                                                EXT2FS_C2B(fs, i))) {
 798                         if (fix_problem(ctx, PR_5_BLOCK_BMAP_PADDING, &pctx)) {
 799                                 for (; i <= end; i++)
 800                                         ext2fs_mark_block_bitmap2(fs->block_map,
 801                                                         EXT2FS_C2B(fs, i));
 802                                 ext2fs_mark_bb_dirty(fs);
 803                         } else
 804                                 ext2fs_unmark_valid(fs);
 805                         break;
 806                 }
 807         }
 808
 809         pctx.errcode = ext2fs_fudge_block_bitmap_end2(fs->block_map,
 810                                                      save_blocks_count, 0);
 811         if (pctx.errcode) {
 812                 pctx.num = 4;
 813                 fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx);
 814                 ctx->flags |= E2F_FLAG_ABORT; /* fatal */
 815                 return;
 816         }
 817 }
 818
 819
 820