| /* |
| * pass5.c --- check block and inode bitmaps against on-disk bitmaps |
| * |
| * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o. |
| * |
| * %Begin-Header% |
| * This file may be redistributed under the terms of the GNU Public |
| * License. |
| * %End-Header% |
| * |
| */ |
| |
| #include "e2fsck.h" |
| #include "problem.h" |
| |
| static void check_block_bitmaps(e2fsck_t ctx); |
| static void check_inode_bitmaps(e2fsck_t ctx); |
| static void check_inode_end(e2fsck_t ctx); |
| static void check_block_end(e2fsck_t ctx); |
| |
| void pass5(e2fsck_t ctx) |
| { |
| #ifdef RESOURCE_TRACK |
| struct resource_track rtrack; |
| #endif |
| struct problem_context pctx; |
| |
| #ifdef MTRACE |
| mtrace_print("Pass 5"); |
| #endif |
| |
| #ifdef RESOURCE_TRACK |
| init_resource_track(&rtrack); |
| #endif |
| |
| clear_problem_context(&pctx); |
| |
| if (!(ctx->options & E2F_OPT_PREEN)) |
| fix_problem(ctx, PR_5_PASS_HEADER, &pctx); |
| |
| read_bitmaps(ctx); |
| |
| check_block_bitmaps(ctx); |
| check_inode_bitmaps(ctx); |
| check_inode_end(ctx); |
| check_block_end(ctx); |
| |
| ext2fs_free_inode_bitmap(ctx->inode_used_map); |
| ctx->inode_used_map = 0; |
| ext2fs_free_inode_bitmap(ctx->inode_dir_map); |
| ctx->inode_dir_map = 0; |
| ext2fs_free_block_bitmap(ctx->block_found_map); |
| ctx->block_found_map = 0; |
| |
| #ifdef RESOURCE_TRACK |
| if (ctx->options & E2F_OPT_TIME2) |
| print_resource_track("Pass 5", &rtrack); |
| #endif |
| } |
| |
| static void check_block_bitmaps(e2fsck_t ctx) |
| { |
| ext2_filsys fs = ctx->fs; |
| blk_t i; |
| int *free_array; |
| int group = 0; |
| int blocks = 0; |
| int free_blocks = 0; |
| int group_free = 0; |
| int actual, bitmap; |
| struct problem_context pctx; |
| int problem, fixit; |
| errcode_t retval; |
| |
| clear_problem_context(&pctx); |
| free_array = allocate_memory(fs->group_desc_count * sizeof(int), |
| "free block count array"); |
| |
| if ((fs->super->s_first_data_block < |
| ext2fs_get_block_bitmap_start(ctx->block_found_map)) || |
| (fs->super->s_blocks_count-1 > |
| ext2fs_get_block_bitmap_end(ctx->block_found_map))) { |
| pctx.num = 1; |
| pctx.blk = fs->super->s_first_data_block; |
| pctx.blk2 = fs->super->s_blocks_count -1; |
| pctx.ino = ext2fs_get_block_bitmap_start(ctx->block_found_map); |
| pctx.ino2 = ext2fs_get_block_bitmap_end(ctx->block_found_map); |
| fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx); |
| /* fatal */ |
| fatal_error(0); |
| } |
| |
| if ((fs->super->s_first_data_block < |
| ext2fs_get_block_bitmap_start(fs->block_map)) || |
| (fs->super->s_blocks_count-1 > |
| ext2fs_get_block_bitmap_end(fs->block_map))) { |
| pctx.num = 2; |
| pctx.blk = fs->super->s_first_data_block; |
| pctx.blk2 = fs->super->s_blocks_count -1; |
| pctx.ino = ext2fs_get_block_bitmap_start(fs->block_map); |
| pctx.ino2 = ext2fs_get_block_bitmap_end(fs->block_map); |
| fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx); |
| /* fatal */ |
| fatal_error(0); |
| } |
| |
| redo_counts: |
| for (i = fs->super->s_first_data_block; |
| i < fs->super->s_blocks_count; |
| i++) { |
| actual = ext2fs_fast_test_block_bitmap(ctx->block_found_map, i); |
| bitmap = ext2fs_fast_test_block_bitmap(fs->block_map, i); |
| |
| if (actual == bitmap) |
| goto do_counts; |
| |
| if (!actual && bitmap) { |
| /* |
| * Block not used, but marked in use in the bitmap. |
| */ |
| problem = PR_5_UNUSED_BLOCK; |
| } else { |
| /* |
| * Block used, but not marked in use in the bitmap. |
| */ |
| problem = PR_5_BLOCK_USED; |
| } |
| pctx.blk = i; |
| fix_problem(ctx, problem, &pctx); |
| |
| do_counts: |
| if (!bitmap) { |
| group_free++; |
| free_blocks++; |
| } |
| blocks ++; |
| if ((blocks == fs->super->s_blocks_per_group) || |
| (i == fs->super->s_blocks_count-1)) { |
| free_array[group] = group_free; |
| group ++; |
| blocks = 0; |
| group_free = 0; |
| } |
| } |
| fixit = end_problem_latch(ctx, PR_LATCH_BBITMAP); |
| if (fixit == 1) { |
| ext2fs_free_block_bitmap(fs->block_map); |
| retval = ext2fs_copy_bitmap(ctx->block_found_map, |
| &fs->block_map); |
| /* XXX check retval --- should never fail! */ |
| ext2fs_set_bitmap_padding(fs->block_map); |
| ext2fs_mark_bb_dirty(fs); |
| |
| /* Redo the counts */ |
| blocks = 0; free_blocks = 0; group_free = 0; group = 0; |
| memset(free_array, 0, fs->group_desc_count * sizeof(int)); |
| goto redo_counts; |
| } else if (fixit == 0) |
| ext2fs_unmark_valid(fs); |
| |
| for (i = 0; i < fs->group_desc_count; i++) { |
| if (free_array[i] != fs->group_desc[i].bg_free_blocks_count) { |
| pctx.group = i; |
| pctx.blk = fs->group_desc[i].bg_free_blocks_count; |
| pctx.blk2 = free_array[i]; |
| |
| if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT_GROUP, |
| &pctx)) { |
| fs->group_desc[i].bg_free_blocks_count = |
| free_array[i]; |
| ext2fs_mark_super_dirty(fs); |
| } else |
| ext2fs_unmark_valid(fs); |
| } |
| } |
| if (free_blocks != fs->super->s_free_blocks_count) { |
| pctx.group = 0; |
| pctx.blk = fs->super->s_free_blocks_count; |
| pctx.blk2 = free_blocks; |
| |
| if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT, &pctx)) { |
| fs->super->s_free_blocks_count = free_blocks; |
| ext2fs_mark_super_dirty(fs); |
| } else |
| ext2fs_unmark_valid(fs); |
| } |
| free(free_array); |
| } |
| |
| static void check_inode_bitmaps(e2fsck_t ctx) |
| { |
| ext2_filsys fs = ctx->fs; |
| ino_t i; |
| int free_inodes = 0; |
| int group_free = 0; |
| int dirs_count = 0; |
| int group = 0; |
| int inodes = 0; |
| int *free_array; |
| int *dir_array; |
| int actual, bitmap; |
| errcode_t retval; |
| struct problem_context pctx; |
| int problem, fixit; |
| |
| clear_problem_context(&pctx); |
| free_array = allocate_memory(fs->group_desc_count * sizeof(int), |
| "free inode count array"); |
| |
| dir_array = allocate_memory(fs->group_desc_count * sizeof(int), |
| "directory count array"); |
| |
| if ((1 < ext2fs_get_inode_bitmap_start(ctx->inode_used_map)) || |
| (fs->super->s_inodes_count > |
| ext2fs_get_inode_bitmap_end(ctx->inode_used_map))) { |
| pctx.num = 3; |
| pctx.blk = 1; |
| pctx.blk2 = fs->super->s_inodes_count; |
| pctx.ino = ext2fs_get_inode_bitmap_start(ctx->inode_used_map); |
| pctx.ino2 = ext2fs_get_inode_bitmap_end(ctx->inode_used_map); |
| fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx); |
| /* fatal */ |
| fatal_error(0); |
| } |
| if ((1 < ext2fs_get_inode_bitmap_start(fs->inode_map)) || |
| (fs->super->s_inodes_count > |
| ext2fs_get_inode_bitmap_end(fs->inode_map))) { |
| pctx.num = 4; |
| pctx.blk = 1; |
| pctx.blk2 = fs->super->s_inodes_count; |
| pctx.ino = ext2fs_get_inode_bitmap_start(fs->inode_map); |
| pctx.ino2 = ext2fs_get_inode_bitmap_end(fs->inode_map); |
| fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx); |
| /* fatal */ |
| fatal_error(0); |
| } |
| |
| redo_counts: |
| for (i = 1; i <= fs->super->s_inodes_count; i++) { |
| actual = ext2fs_fast_test_inode_bitmap(ctx->inode_used_map, i); |
| bitmap = ext2fs_fast_test_inode_bitmap(fs->inode_map, i); |
| |
| if (actual == bitmap) |
| goto do_counts; |
| |
| if (!actual && bitmap) { |
| /* |
| * Inode wasn't used, but marked in bitmap |
| */ |
| problem = PR_5_UNUSED_INODE; |
| } else /* if (actual && !bitmap) */ { |
| /* |
| * Inode used, but not in bitmap |
| */ |
| problem = PR_5_INODE_USED; |
| } |
| pctx.ino = i; |
| fix_problem(ctx, problem, &pctx); |
| |
| do_counts: |
| if (!bitmap) { |
| group_free++; |
| free_inodes++; |
| } else { |
| if (ext2fs_test_inode_bitmap(ctx->inode_dir_map, i)) |
| dirs_count++; |
| } |
| inodes++; |
| if ((inodes == fs->super->s_inodes_per_group) || |
| (i == fs->super->s_inodes_count)) { |
| free_array[group] = group_free; |
| dir_array[group] = dirs_count; |
| group ++; |
| inodes = 0; |
| group_free = 0; |
| dirs_count = 0; |
| } |
| } |
| fixit = end_problem_latch(ctx, PR_LATCH_IBITMAP); |
| if (fixit == 1) { |
| ext2fs_free_inode_bitmap(fs->inode_map); |
| retval = ext2fs_copy_bitmap(ctx->inode_used_map, |
| &fs->inode_map); |
| /* XXX check retval --- should never fail! */ |
| ext2fs_set_bitmap_padding(fs->inode_map); |
| ext2fs_mark_ib_dirty(fs); |
| |
| /* redo counts */ |
| inodes = 0; free_inodes = 0; group_free = 0; |
| dirs_count = 0; group = 0; |
| memset(free_array, 0, fs->group_desc_count * sizeof(int)); |
| memset(dir_array, 0, fs->group_desc_count * sizeof(int)); |
| goto redo_counts; |
| } else if (fixit == 0) |
| ext2fs_unmark_valid(fs); |
| |
| for (i = 0; i < fs->group_desc_count; i++) { |
| if (free_array[i] != fs->group_desc[i].bg_free_inodes_count) { |
| pctx.group = i; |
| pctx.ino = fs->group_desc[i].bg_free_inodes_count; |
| pctx.ino2 = free_array[i]; |
| if (fix_problem(ctx, PR_5_FREE_INODE_COUNT_GROUP, |
| &pctx)) { |
| fs->group_desc[i].bg_free_inodes_count = |
| free_array[i]; |
| ext2fs_mark_super_dirty(fs); |
| } else |
| ext2fs_unmark_valid(fs); |
| } |
| if (dir_array[i] != fs->group_desc[i].bg_used_dirs_count) { |
| pctx.group = i; |
| pctx.ino = fs->group_desc[i].bg_used_dirs_count; |
| pctx.ino2 = dir_array[i]; |
| |
| if (fix_problem(ctx, PR_5_FREE_DIR_COUNT_GROUP, |
| &pctx)) { |
| fs->group_desc[i].bg_used_dirs_count = |
| dir_array[i]; |
| ext2fs_mark_super_dirty(fs); |
| } else |
| ext2fs_unmark_valid(fs); |
| } |
| } |
| if (free_inodes != fs->super->s_free_inodes_count) { |
| pctx.group = -1; |
| pctx.ino = fs->super->s_free_inodes_count; |
| pctx.ino2 = free_inodes; |
| |
| if (fix_problem(ctx, PR_5_FREE_INODE_COUNT, &pctx)) { |
| fs->super->s_free_inodes_count = free_inodes; |
| ext2fs_mark_super_dirty(fs); |
| } else |
| ext2fs_unmark_valid(fs); |
| } |
| free(free_array); |
| free(dir_array); |
| } |
| |
| static void check_inode_end(e2fsck_t ctx) |
| { |
| ext2_filsys fs = ctx->fs; |
| ino_t end, save_inodes_count, i; |
| struct problem_context pctx; |
| |
| clear_problem_context(&pctx); |
| |
| end = EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count; |
| pctx.errcode = ext2fs_fudge_inode_bitmap_end(fs->inode_map, end, |
| &save_inodes_count); |
| if (pctx.errcode) { |
| pctx.num = 1; |
| fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx); |
| fatal_error(0); |
| } |
| if (save_inodes_count == end) |
| return; |
| |
| for (i = save_inodes_count + 1; i <= end; i++) { |
| if (!ext2fs_test_inode_bitmap(fs->inode_map, i)) { |
| if (fix_problem(ctx, PR_5_INODE_BMAP_PADDING, &pctx)) { |
| for (i = save_inodes_count + 1; i <= end; i++) |
| ext2fs_mark_inode_bitmap(fs->inode_map, |
| i); |
| ext2fs_mark_ib_dirty(fs); |
| } else |
| ext2fs_unmark_valid(fs); |
| break; |
| } |
| } |
| |
| pctx.errcode = ext2fs_fudge_inode_bitmap_end(fs->inode_map, |
| save_inodes_count, 0); |
| if (pctx.errcode) { |
| pctx.num = 2; |
| fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx); |
| fatal_error(0); |
| } |
| } |
| |
| static void check_block_end(e2fsck_t ctx) |
| { |
| ext2_filsys fs = ctx->fs; |
| blk_t end, save_blocks_count, i; |
| struct problem_context pctx; |
| |
| clear_problem_context(&pctx); |
| |
| end = fs->block_map->start + |
| (EXT2_BLOCKS_PER_GROUP(fs->super) * fs->group_desc_count) - 1; |
| pctx.errcode = ext2fs_fudge_block_bitmap_end(fs->block_map, end, |
| &save_blocks_count); |
| if (pctx.errcode) { |
| pctx.num = 3; |
| fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx); |
| fatal_error(0); |
| } |
| if (save_blocks_count == end) |
| return; |
| |
| for (i = save_blocks_count + 1; i <= end; i++) { |
| if (!ext2fs_test_block_bitmap(fs->block_map, i)) { |
| if (fix_problem(ctx, PR_5_BLOCK_BMAP_PADDING, &pctx)) { |
| for (i = save_blocks_count + 1; i < end; i++) |
| ext2fs_mark_block_bitmap(fs->block_map, |
| i); |
| ext2fs_mark_bb_dirty(fs); |
| } else |
| ext2fs_unmark_valid(fs); |
| break; |
| } |
| } |
| |
| pctx.errcode = ext2fs_fudge_block_bitmap_end(fs->block_map, |
| save_blocks_count, 0); |
| if (pctx.errcode) { |
| pctx.num = 4; |
| fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx); |
| fatal_error(0); |
| } |
| } |
| |
| |
| |