mirror of https://github.com/vitalif/e2fsprogs
548 lines
14 KiB
C
548 lines
14 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, 1995, 1996, 1997 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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*
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*/
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#include "e2fsck.h"
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#include "problem.h"
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static void check_block_bitmaps(e2fsck_t ctx);
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static void check_inode_bitmaps(e2fsck_t ctx);
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static void check_inode_end(e2fsck_t ctx);
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static void check_block_end(e2fsck_t ctx);
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void e2fsck_pass5(e2fsck_t ctx)
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{
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#ifdef RESOURCE_TRACK
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struct resource_track rtrack;
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#endif
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struct problem_context pctx;
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#ifdef MTRACE
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mtrace_print("Pass 5");
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#endif
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#ifdef RESOURCE_TRACK
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init_resource_track(&rtrack);
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#endif
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clear_problem_context(&pctx);
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if (!(ctx->options & E2F_OPT_PREEN))
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fix_problem(ctx, PR_5_PASS_HEADER, &pctx);
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if (ctx->progress)
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if ((ctx->progress)(ctx, 5, 0, ctx->fs->group_desc_count*2))
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return;
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e2fsck_read_bitmaps(ctx);
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check_block_bitmaps(ctx);
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if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
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return;
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check_inode_bitmaps(ctx);
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if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
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return;
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check_inode_end(ctx);
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if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
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return;
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check_block_end(ctx);
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if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
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return;
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ext2fs_free_inode_bitmap(ctx->inode_used_map);
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ctx->inode_used_map = 0;
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ext2fs_free_inode_bitmap(ctx->inode_dir_map);
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ctx->inode_dir_map = 0;
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ext2fs_free_block_bitmap(ctx->block_found_map);
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ctx->block_found_map = 0;
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#ifdef RESOURCE_TRACK
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if (ctx->options & E2F_OPT_TIME2) {
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e2fsck_clear_progbar(ctx);
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print_resource_track(_("Pass 5"), &rtrack);
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}
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#endif
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}
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#define NO_BLK ((blk_t) -1)
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static print_bitmap_problem(e2fsck_t ctx, int problem,
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struct problem_context *pctx)
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{
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switch (problem) {
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case PR_5_BLOCK_UNUSED:
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if (pctx->blk == pctx->blk2)
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pctx->blk2 = 0;
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else
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problem = PR_5_BLOCK_RANGE_UNUSED;
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break;
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case PR_5_BLOCK_USED:
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if (pctx->blk == pctx->blk2)
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pctx->blk2 = 0;
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else
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problem = PR_5_BLOCK_RANGE_USED;
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break;
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case PR_5_INODE_UNUSED:
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if (pctx->ino == pctx->ino2)
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pctx->ino2 = 0;
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else
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problem = PR_5_INODE_RANGE_UNUSED;
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break;
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case PR_5_INODE_USED:
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if (pctx->ino == pctx->ino2)
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pctx->ino2 = 0;
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else
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problem = PR_5_INODE_RANGE_USED;
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break;
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}
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fix_problem(ctx, problem, pctx);
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pctx->blk = pctx->blk2 = NO_BLK;
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pctx->ino = pctx->ino2 = 0;
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}
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static void check_block_bitmaps(e2fsck_t ctx)
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{
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ext2_filsys fs = ctx->fs;
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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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struct problem_context pctx;
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int problem, save_problem, fixit, had_problem;
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errcode_t retval;
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clear_problem_context(&pctx);
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free_array = (int *) e2fsck_allocate_memory(ctx,
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fs->group_desc_count * sizeof(int), "free block count array");
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if ((fs->super->s_first_data_block <
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ext2fs_get_block_bitmap_start(ctx->block_found_map)) ||
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(fs->super->s_blocks_count-1 >
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ext2fs_get_block_bitmap_end(ctx->block_found_map))) {
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pctx.num = 1;
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pctx.blk = fs->super->s_first_data_block;
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pctx.blk2 = fs->super->s_blocks_count -1;
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pctx.ino = ext2fs_get_block_bitmap_start(ctx->block_found_map);
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pctx.ino2 = ext2fs_get_block_bitmap_end(ctx->block_found_map);
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fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
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ctx->flags |= E2F_FLAG_ABORT; /* fatal */
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return;
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}
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if ((fs->super->s_first_data_block <
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ext2fs_get_block_bitmap_start(fs->block_map)) ||
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(fs->super->s_blocks_count-1 >
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ext2fs_get_block_bitmap_end(fs->block_map))) {
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pctx.num = 2;
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pctx.blk = fs->super->s_first_data_block;
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pctx.blk2 = fs->super->s_blocks_count -1;
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pctx.ino = ext2fs_get_block_bitmap_start(fs->block_map);
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pctx.ino2 = ext2fs_get_block_bitmap_end(fs->block_map);
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fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
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ctx->flags |= E2F_FLAG_ABORT; /* fatal */
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return;
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}
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redo_counts:
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had_problem = 0;
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save_problem = 0;
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pctx.blk = pctx.blk2 = NO_BLK;
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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_fast_test_block_bitmap(ctx->block_found_map, i);
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bitmap = ext2fs_fast_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 (!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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problem = PR_5_BLOCK_UNUSED;
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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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problem = PR_5_BLOCK_USED;
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}
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if (pctx.blk == NO_BLK) {
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pctx.blk = pctx.blk2 = i;
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save_problem = problem;
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} else {
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if ((problem == save_problem) &&
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(pctx.blk2 == i-1))
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pctx.blk2++;
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else {
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print_bitmap_problem(ctx, save_problem, &pctx);
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pctx.blk = pctx.blk2 = i;
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save_problem = problem;
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}
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}
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ctx->flags |= E2F_FLAG_PROG_SUPPRESS;
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had_problem++;
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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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if (ctx->progress)
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if ((ctx->progress)(ctx, 5, group,
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fs->group_desc_count*2))
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return;
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}
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}
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if (pctx.blk != NO_BLK)
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print_bitmap_problem(ctx, save_problem, &pctx);
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if (had_problem)
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fixit = end_problem_latch(ctx, PR_LATCH_BBITMAP);
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else
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fixit = -1;
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ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS;
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if (fixit == 1) {
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ext2fs_free_block_bitmap(fs->block_map);
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retval = ext2fs_copy_bitmap(ctx->block_found_map,
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&fs->block_map);
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if (retval) {
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clear_problem_context(&pctx);
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fix_problem(ctx, PR_5_COPY_BBITMAP_ERROR, &pctx);
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ctx->flags |= E2F_FLAG_ABORT;
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return;
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}
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ext2fs_set_bitmap_padding(fs->block_map);
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ext2fs_mark_bb_dirty(fs);
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/* Redo the counts */
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blocks = 0; free_blocks = 0; group_free = 0; group = 0;
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memset(free_array, 0, fs->group_desc_count * sizeof(int));
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goto redo_counts;
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} else if (fixit == 0)
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ext2fs_unmark_valid(fs);
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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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pctx.group = i;
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pctx.blk = fs->group_desc[i].bg_free_blocks_count;
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pctx.blk2 = free_array[i];
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if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT_GROUP,
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&pctx)) {
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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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pctx.group = 0;
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pctx.blk = fs->super->s_free_blocks_count;
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pctx.blk2 = free_blocks;
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if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT, &pctx)) {
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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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ext2fs_free_mem((void **) &free_array);
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}
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static void check_inode_bitmaps(e2fsck_t ctx)
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{
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ext2_filsys fs = ctx->fs;
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ext2_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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errcode_t retval;
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struct problem_context pctx;
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int problem, save_problem, fixit, had_problem;
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clear_problem_context(&pctx);
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free_array = (int *) e2fsck_allocate_memory(ctx,
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fs->group_desc_count * sizeof(int), "free inode count array");
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dir_array = (int *) e2fsck_allocate_memory(ctx,
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fs->group_desc_count * sizeof(int), "directory count array");
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if ((1 < ext2fs_get_inode_bitmap_start(ctx->inode_used_map)) ||
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(fs->super->s_inodes_count >
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ext2fs_get_inode_bitmap_end(ctx->inode_used_map))) {
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pctx.num = 3;
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pctx.blk = 1;
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pctx.blk2 = fs->super->s_inodes_count;
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pctx.ino = ext2fs_get_inode_bitmap_start(ctx->inode_used_map);
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pctx.ino2 = ext2fs_get_inode_bitmap_end(ctx->inode_used_map);
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fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
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ctx->flags |= E2F_FLAG_ABORT; /* fatal */
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return;
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}
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if ((1 < ext2fs_get_inode_bitmap_start(fs->inode_map)) ||
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(fs->super->s_inodes_count >
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ext2fs_get_inode_bitmap_end(fs->inode_map))) {
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pctx.num = 4;
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pctx.blk = 1;
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pctx.blk2 = fs->super->s_inodes_count;
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pctx.ino = ext2fs_get_inode_bitmap_start(fs->inode_map);
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pctx.ino2 = ext2fs_get_inode_bitmap_end(fs->inode_map);
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fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);
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ctx->flags |= E2F_FLAG_ABORT; /* fatal */
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return;
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}
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redo_counts:
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had_problem = 0;
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save_problem = 0;
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pctx.ino = pctx.ino2 = 0;
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for (i = 1; i <= fs->super->s_inodes_count; i++) {
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actual = ext2fs_fast_test_inode_bitmap(ctx->inode_used_map, i);
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bitmap = ext2fs_fast_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 (!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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problem = PR_5_INODE_UNUSED;
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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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problem = PR_5_INODE_USED;
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}
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if (pctx.ino == 0) {
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pctx.ino = pctx.ino2 = i;
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save_problem = problem;
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} else {
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if ((problem == save_problem) &&
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(pctx.ino2 == i-1))
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pctx.ino2++;
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else {
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print_bitmap_problem(ctx, save_problem, &pctx);
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pctx.ino = pctx.ino2 = i;
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save_problem = problem;
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}
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}
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ctx->flags |= E2F_FLAG_PROG_SUPPRESS;
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had_problem++;
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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(ctx->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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if (ctx->progress)
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if ((ctx->progress)(ctx, 5,
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group + fs->group_desc_count,
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fs->group_desc_count*2))
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return;
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}
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}
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if (pctx.ino)
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print_bitmap_problem(ctx, save_problem, &pctx);
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if (had_problem)
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fixit = end_problem_latch(ctx, PR_LATCH_IBITMAP);
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else
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fixit = -1;
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ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS;
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if (fixit == 1) {
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ext2fs_free_inode_bitmap(fs->inode_map);
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retval = ext2fs_copy_bitmap(ctx->inode_used_map,
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&fs->inode_map);
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if (retval) {
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clear_problem_context(&pctx);
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fix_problem(ctx, PR_5_COPY_IBITMAP_ERROR, &pctx);
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ctx->flags |= E2F_FLAG_ABORT;
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return;
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}
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ext2fs_set_bitmap_padding(fs->inode_map);
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ext2fs_mark_ib_dirty(fs);
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/* redo counts */
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inodes = 0; free_inodes = 0; group_free = 0;
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dirs_count = 0; group = 0;
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memset(free_array, 0, fs->group_desc_count * sizeof(int));
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memset(dir_array, 0, fs->group_desc_count * sizeof(int));
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goto redo_counts;
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} else if (fixit == 0)
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ext2fs_unmark_valid(fs);
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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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pctx.group = i;
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pctx.ino = fs->group_desc[i].bg_free_inodes_count;
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pctx.ino2 = free_array[i];
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if (fix_problem(ctx, PR_5_FREE_INODE_COUNT_GROUP,
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&pctx)) {
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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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pctx.group = i;
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pctx.ino = fs->group_desc[i].bg_used_dirs_count;
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pctx.ino2 = dir_array[i];
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if (fix_problem(ctx, PR_5_FREE_DIR_COUNT_GROUP,
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&pctx)) {
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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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pctx.group = -1;
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pctx.ino = fs->super->s_free_inodes_count;
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pctx.ino2 = free_inodes;
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if (fix_problem(ctx, PR_5_FREE_INODE_COUNT, &pctx)) {
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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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ext2fs_free_mem((void **) &free_array);
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ext2fs_free_mem((void **) &dir_array);
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}
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static void check_inode_end(e2fsck_t ctx)
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{
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ext2_filsys fs = ctx->fs;
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ext2_ino_t end, save_inodes_count, i;
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struct problem_context pctx;
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clear_problem_context(&pctx);
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end = EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count;
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pctx.errcode = ext2fs_fudge_inode_bitmap_end(fs->inode_map, end,
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&save_inodes_count);
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if (pctx.errcode) {
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pctx.num = 1;
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fix_problem(ctx, PR_5_FUDGE_BITMAP_ERROR, &pctx);
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ctx->flags |= E2F_FLAG_ABORT; /* fatal */
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return;
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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++) {
|
|
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);
|
|
ctx->flags |= E2F_FLAG_ABORT; /* fatal */
|
|
return;
|
|
}
|
|
}
|
|
|
|
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);
|
|
ctx->flags |= E2F_FLAG_ABORT; /* fatal */
|
|
return;
|
|
}
|
|
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);
|
|
ctx->flags |= E2F_FLAG_ABORT; /* fatal */
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
|