mirror of
https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git
synced 2025-01-01 14:13:26 +08:00
359 lines
8.6 KiB
C
359 lines
8.6 KiB
C
/*
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* pass5.c --- check block and inode bitmaps against on-disk bitmaps
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*
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* Copyright (C) 1993, 1994 Theodore Ts'o. This file may be
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* redistributed under the terms of the GNU Public License.
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*
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*/
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#include "et/com_err.h"
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#include "e2fsck.h"
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static void check_block_bitmaps(ext2_filsys fs);
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static void check_inode_bitmaps(ext2_filsys fs);
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static void check_inode_end(ext2_filsys fs);
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static void check_block_end(ext2_filsys fs);
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static int do_fix = -1;
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static const char *fix_question = "Fix summary information";
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void pass5(ext2_filsys fs)
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{
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struct resource_track rtrack;
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#ifdef MTRACE
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mtrace_print("Pass 5");
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#endif
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init_resource_track(&rtrack);
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if (!preen)
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printf("Pass 5: Checking group summary information\n");
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read_bitmaps(fs);
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check_block_bitmaps(fs);
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check_inode_bitmaps(fs);
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check_inode_end(fs);
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check_block_end(fs);
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ext2fs_free_inode_bitmap(inode_used_map);
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ext2fs_free_inode_bitmap(inode_dir_map);
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ext2fs_free_block_bitmap(block_found_map);
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if (tflag > 1) {
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printf("Pass 5: ");
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print_resource_track(&rtrack);
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}
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}
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static void check_block_bitmaps(ext2_filsys fs)
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{
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blk_t i;
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int *free_array;
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int group = 0;
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int blocks = 0;
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int free_blocks = 0;
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int group_free = 0;
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int actual, bitmap;
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const char *print_header = "Block bitmap differences:";
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free_array = allocate_memory(fs->group_desc_count * sizeof(int),
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"free block count array");
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for (i = fs->super->s_first_data_block;
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i < fs->super->s_blocks_count;
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i++) {
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actual = ext2fs_test_block_bitmap(block_found_map, i);
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bitmap = ext2fs_test_block_bitmap(fs->block_map, i);
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if (actual == bitmap)
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goto do_counts;
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if (do_fix < 0)
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do_fix = ask(fix_question, 1);
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if (!preen && print_header) {
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printf(print_header);
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print_header = 0;
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}
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if (!actual && bitmap) {
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/*
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* Block not used, but marked in use in the bitmap.
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*/
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if (!preen)
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printf(" -%lu", i);
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if (do_fix)
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ext2fs_unmark_block_bitmap(fs->block_map,
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i);
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} else {
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/*
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* Block used, but not marked in use in the bitmap.
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*/
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if (!preen)
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printf(" +%lu", i);
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if (do_fix)
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ext2fs_mark_block_bitmap(fs->block_map,
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i);
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}
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if (do_fix) {
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ext2fs_mark_bb_dirty(fs);
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bitmap = actual;
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} else
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ext2fs_unmark_valid(fs);
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do_counts:
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if (!bitmap) {
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group_free++;
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free_blocks++;
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}
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blocks ++;
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if ((blocks == fs->super->s_blocks_per_group) ||
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(i == fs->super->s_blocks_count-1)) {
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free_array[group] = group_free;
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group ++;
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blocks = 0;
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group_free = 0;
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}
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}
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if (!print_header)
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printf(". %s\n", fix_msg[do_fix]);
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for (i = 0; i < fs->group_desc_count; i++) {
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if (free_array[i] != fs->group_desc[i].bg_free_blocks_count) {
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if (do_fix < 0)
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do_fix = ask(fix_question, 1);
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if (!preen)
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printf("Free blocks count wrong for "
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"group %lu (%u, counted=%d). %s\n", i,
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fs->group_desc[i].bg_free_blocks_count,
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free_array[i], fix_msg[do_fix]);
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if (do_fix) {
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fs->group_desc[i].bg_free_blocks_count =
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free_array[i];
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ext2fs_mark_super_dirty(fs);
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} else
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ext2fs_unmark_valid(fs);
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}
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}
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if (free_blocks != fs->super->s_free_blocks_count) {
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if (do_fix < 0)
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do_fix = ask(fix_question, 1);
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if (!preen)
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printf("Free blocks count wrong "
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"(%lu, counted=%d). %s\n",
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fs->super->s_free_blocks_count, free_blocks,
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fix_msg[do_fix]);
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if (do_fix) {
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fs->super->s_free_blocks_count = free_blocks;
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ext2fs_mark_super_dirty(fs);
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} else
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ext2fs_unmark_valid(fs);
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}
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}
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static void check_inode_bitmaps(ext2_filsys fs)
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{
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ino_t i;
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int free_inodes = 0;
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int group_free = 0;
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int dirs_count = 0;
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int group = 0;
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int inodes = 0;
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int *free_array;
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int *dir_array;
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int actual, bitmap;
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const char *print_header = "Inode bitmap differences:";
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free_array = allocate_memory(fs->group_desc_count * sizeof(int),
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"free inode count array");
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dir_array = allocate_memory(fs->group_desc_count * sizeof(int),
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"directory count array");
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for (i = 1; i <= fs->super->s_inodes_count; i++) {
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actual = ext2fs_test_inode_bitmap(inode_used_map, i);
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bitmap = ext2fs_test_inode_bitmap(fs->inode_map, i);
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if (actual == bitmap)
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goto do_counts;
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if (do_fix < 0)
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do_fix = ask(fix_question, 1);
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if (!preen && print_header) {
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printf(print_header);
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print_header = 0;
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}
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if (!actual && bitmap) {
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/*
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* Inode wasn't used, but marked in bitmap
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*/
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if (!preen)
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printf(" -%lu", i);
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if (do_fix)
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ext2fs_unmark_inode_bitmap(fs->inode_map, i);
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} else if (actual && !bitmap) {
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/*
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* Inode used, but not in bitmap
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*/
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if (!preen)
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printf (" +%lu", i);
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if (do_fix)
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ext2fs_mark_inode_bitmap(fs->inode_map, i);
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}
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if (do_fix) {
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ext2fs_mark_ib_dirty(fs);
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bitmap = actual;
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} else
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ext2fs_unmark_valid(fs);
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do_counts:
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if (!bitmap) {
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group_free++;
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free_inodes++;
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} else {
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if (ext2fs_test_inode_bitmap(inode_dir_map, i))
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dirs_count++;
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}
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inodes++;
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if ((inodes == fs->super->s_inodes_per_group) ||
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(i == fs->super->s_inodes_count)) {
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free_array[group] = group_free;
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dir_array[group] = dirs_count;
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group ++;
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inodes = 0;
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group_free = 0;
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dirs_count = 0;
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}
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}
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if (!print_header)
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printf(". %s\n", fix_msg[do_fix]);
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for (i = 0; i < fs->group_desc_count; i++) {
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if (free_array[i] != fs->group_desc[i].bg_free_inodes_count) {
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if (do_fix < 0)
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do_fix = ask(fix_question, 1);
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if (!preen)
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printf ("Free inodes count wrong for "
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"group #%lu (%u, counted=%d). %s\n", i,
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fs->group_desc[i].bg_free_inodes_count,
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free_array[i], fix_msg[do_fix]);
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if (do_fix) {
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fs->group_desc[i].bg_free_inodes_count =
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free_array[i];
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ext2fs_mark_super_dirty(fs);
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} else
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ext2fs_unmark_valid(fs);
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}
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if (dir_array[i] != fs->group_desc[i].bg_used_dirs_count) {
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if (do_fix < 0)
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do_fix = ask(fix_question, 1);
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if (!preen)
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printf ("Directories count wrong for "
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"group #%lu (%u, counted=%d). %s\n", i,
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fs->group_desc[i].bg_used_dirs_count,
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dir_array[i], fix_msg[do_fix]);
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if (do_fix) {
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fs->group_desc[i].bg_used_dirs_count =
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dir_array[i];
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ext2fs_mark_super_dirty(fs);
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} else
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ext2fs_unmark_valid(fs);
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}
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}
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if (free_inodes != fs->super->s_free_inodes_count) {
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if (do_fix < 0)
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do_fix = ask(fix_question, 1);
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if (!preen)
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printf("Free inodes count wrong "
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"(%lu, counted=%d). %s\n",
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fs->super->s_free_inodes_count, free_inodes,
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fix_msg[do_fix]);
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if (do_fix) {
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fs->super->s_free_inodes_count = free_inodes;
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ext2fs_mark_super_dirty(fs);
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} else
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ext2fs_unmark_valid(fs);
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}
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}
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static void check_inode_end(ext2_filsys fs)
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{
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ino_t end, save_inodes_count, i;
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errcode_t retval;
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end = EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count;
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retval = ext2fs_fudge_inode_bitmap_end(fs->inode_map, end,
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&save_inodes_count);
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if (retval) {
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com_err("check_inode_end", retval,
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"while trying to fudge end of inode bitmap");
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fatal_error(0);
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}
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if (save_inodes_count == end)
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return;
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for (i = save_inodes_count + 1; i <= end; i++) {
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if (!ext2fs_test_inode_bitmap(fs->inode_map, i)) {
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printf("Padding at end of inode bitmap is not set. ");
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if (ask("Fix", 1)) {
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for (i = save_inodes_count + 1; i <= end; i++)
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ext2fs_mark_inode_bitmap(fs->inode_map,
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i);
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ext2fs_mark_ib_dirty(fs);
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} else
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ext2fs_unmark_valid(fs);
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break;
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}
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}
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retval = ext2fs_fudge_inode_bitmap_end(fs->inode_map,
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save_inodes_count, 0);
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if (retval) {
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com_err("check_inode_end", retval,
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"while trying to fudge end of inode bitmap back");
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fatal_error(0);
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}
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}
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static void check_block_end(ext2_filsys fs)
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{
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blk_t end, save_blocks_count, i;
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errcode_t retval;
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end = fs->block_map->start +
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(EXT2_BLOCKS_PER_GROUP(fs->super) * fs->group_desc_count) - 1;
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retval = ext2fs_fudge_block_bitmap_end(fs->block_map, end,
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&save_blocks_count);
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if (retval) {
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com_err("check_block_end", retval,
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"while trying to fudge end of block bitmap");
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fatal_error(0);
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}
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if (save_blocks_count == end)
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return;
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for (i = save_blocks_count + 1; i <= end; i++) {
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if (!ext2fs_test_block_bitmap(fs->block_map, i)) {
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printf("Padding at end of block bitmap is not set. ");
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if (ask("Fix", 1)) {
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for (i = save_blocks_count + 1; i < end; i++)
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ext2fs_mark_block_bitmap(fs->block_map,
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i);
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ext2fs_mark_bb_dirty(fs);
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} else
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ext2fs_unmark_valid(fs);
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break;
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}
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}
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retval = ext2fs_fudge_block_bitmap_end(fs->block_map,
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save_blocks_count, 0);
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if (retval) {
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com_err("check_block_end", retval,
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"while trying to fudge end of block bitmap back");
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fatal_error(0);
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}
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}
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