Ejemplo n.º 1
0
static int check_dir_block(ext2_filsys fs,
			   struct ext2_db_entry2 *db,
			   void *priv_data)
{
 	struct dx_dir_info	*dx_dir;
#ifdef ENABLE_HTREE
	struct dx_dirblock_info	*dx_db = 0;
#endif /* ENABLE_HTREE */
	struct ext2_dir_entry 	*dirent, *prev;
	ext2_dirhash_t		hash;
	unsigned int		offset = 0;
	int			dir_modified = 0;
	int			dot_state;
	unsigned int		rec_len;
	blk64_t			block_nr = db->blk;
	ext2_ino_t 		ino = db->ino;
	ext2_ino_t 		subdir_parent;
	__u16			links;
	struct check_dir_struct	*cd;
	char 			*buf;
	e2fsck_t		ctx;
	int			problem;
	struct ext2_dx_root_info *root;
	struct ext2_dx_countlimit *limit;
	static dict_t de_dict;
	struct problem_context	pctx;
	int	dups_found = 0;
	int	ret;
	int	dx_csum_size = 0, de_csum_size = 0;
	int	failed_csum = 0;
	int	is_leaf = 1;

	cd = (struct check_dir_struct *) priv_data;
	buf = cd->buf;
	ctx = cd->ctx;

	if (ctx->flags & E2F_FLAG_SIGNAL_MASK || ctx->flags & E2F_FLAG_RESTART)
		return DIRENT_ABORT;

	if (ctx->progress && (ctx->progress)(ctx, 2, cd->count++, cd->max))
		return DIRENT_ABORT;

	if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
				       EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
		dx_csum_size = sizeof(struct ext2_dx_tail);
		de_csum_size = sizeof(struct ext2_dir_entry_tail);
	}

	/*
	 * Make sure the inode is still in use (could have been
	 * deleted in the duplicate/bad blocks pass.
	 */
	if (!(ext2fs_test_inode_bitmap2(ctx->inode_used_map, ino)))
		return 0;

	cd->pctx.ino = ino;
	cd->pctx.blk = block_nr;
	cd->pctx.blkcount = db->blockcnt;
	cd->pctx.ino2 = 0;
	cd->pctx.dirent = 0;
	cd->pctx.num = 0;

	if (db->blk == 0) {
		if (allocate_dir_block(ctx, db, buf, &cd->pctx))
			return 0;
		block_nr = db->blk;
	}

	if (db->blockcnt)
		dot_state = 2;
	else
		dot_state = 0;

	if (ctx->dirs_to_hash &&
	    ext2fs_u32_list_test(ctx->dirs_to_hash, ino))
		dups_found++;

#if 0
	printf("In process_dir_block block %lu, #%d, inode %lu\n", block_nr,
	       db->blockcnt, ino);
#endif

	ehandler_operation(_("reading directory block"));
	cd->pctx.errcode = ext2fs_read_dir_block4(fs, block_nr, buf, 0, ino);
	ehandler_operation(0);
	if (cd->pctx.errcode == EXT2_ET_DIR_CORRUPTED)
		cd->pctx.errcode = 0; /* We'll handle this ourselves */
	else if (cd->pctx.errcode == EXT2_ET_DIR_CSUM_INVALID) {
		cd->pctx.errcode = 0; /* We'll handle this ourselves */
		failed_csum = 1;
	}
	if (cd->pctx.errcode) {
		char *buf2;
		if (!fix_problem(ctx, PR_2_READ_DIRBLOCK, &cd->pctx)) {
			ctx->flags |= E2F_FLAG_ABORT;
			return DIRENT_ABORT;
		}
		ext2fs_new_dir_block(fs, db->blockcnt == 0 ? ino : 0,
				     EXT2_ROOT_INO, &buf2);
		memcpy(buf, buf2, fs->blocksize);
		ext2fs_free_mem(&buf2);
	}
#ifdef ENABLE_HTREE
	dx_dir = e2fsck_get_dx_dir_info(ctx, ino);
	if (dx_dir && dx_dir->numblocks) {
		if (db->blockcnt >= dx_dir->numblocks) {
			if (fix_problem(ctx, PR_2_UNEXPECTED_HTREE_BLOCK,
					&pctx)) {
				clear_htree(ctx, ino);
				dx_dir->numblocks = 0;
				dx_db = 0;
				goto out_htree;
			}
			fatal_error(ctx, _("Can not continue."));
		}
		dx_db = &dx_dir->dx_block[db->blockcnt];
		dx_db->type = DX_DIRBLOCK_LEAF;
		dx_db->phys = block_nr;
		dx_db->min_hash = ~0;
		dx_db->max_hash = 0;

		dirent = (struct ext2_dir_entry *) buf;
		(void) ext2fs_get_rec_len(fs, dirent, &rec_len);
		limit = (struct ext2_dx_countlimit *) (buf+8);
		if (db->blockcnt == 0) {
			root = (struct ext2_dx_root_info *) (buf + 24);
			dx_db->type = DX_DIRBLOCK_ROOT;
			dx_db->flags |= DX_FLAG_FIRST | DX_FLAG_LAST;
			if ((root->reserved_zero ||
			     root->info_length < 8 ||
			     root->indirect_levels > 1) &&
			    fix_problem(ctx, PR_2_HTREE_BAD_ROOT, &cd->pctx)) {
				clear_htree(ctx, ino);
				dx_dir->numblocks = 0;
				dx_db = 0;
			}
			dx_dir->hashversion = root->hash_version;
			if ((dx_dir->hashversion <= EXT2_HASH_TEA) &&
			    (fs->super->s_flags & EXT2_FLAGS_UNSIGNED_HASH))
				dx_dir->hashversion += 3;
			dx_dir->depth = root->indirect_levels + 1;
		} else if ((dirent->inode == 0) &&
			   (rec_len == fs->blocksize) &&
			   (dirent->name_len == 0) &&
			   (ext2fs_le16_to_cpu(limit->limit) ==
			    ((fs->blocksize - (8 + dx_csum_size)) /
			     sizeof(struct ext2_dx_entry))))
			dx_db->type = DX_DIRBLOCK_NODE;
		is_leaf = 0;
	}
out_htree:
#endif /* ENABLE_HTREE */

	/* Verify checksum. */
	if (is_leaf && de_csum_size) {
		/* No space for csum?  Rebuild dirs in pass 3A. */
		if (!ext2fs_dirent_has_tail(fs, (struct ext2_dir_entry *)buf)) {
			de_csum_size = 0;
			if (e2fsck_dir_will_be_rehashed(ctx, ino))
				goto skip_checksum;
			if (!fix_problem(cd->ctx, PR_2_LEAF_NODE_MISSING_CSUM,
					 &cd->pctx))
				goto skip_checksum;
			e2fsck_rehash_dir_later(ctx, ino);
			goto skip_checksum;
		}
		if (failed_csum) {
			char *buf2;
			if (!fix_problem(cd->ctx, PR_2_LEAF_NODE_CSUM_INVALID,
					 &cd->pctx))
				goto skip_checksum;
			ext2fs_new_dir_block(fs,
					     db->blockcnt == 0 ? ino : 0,
					     EXT2_ROOT_INO, &buf2);
			memcpy(buf, buf2, fs->blocksize);
			ext2fs_free_mem(&buf2);
			dir_modified++;
			failed_csum = 0;
		}
	}
	/* htree nodes don't use fake dirents to store checksums */
	if (!is_leaf)
		de_csum_size = 0;

skip_checksum:
	dict_init(&de_dict, DICTCOUNT_T_MAX, dict_de_cmp);
	prev = 0;
	do {
		int group;
		ext2_ino_t first_unused_inode;

		problem = 0;
		dirent = (struct ext2_dir_entry *) (buf + offset);
		(void) ext2fs_get_rec_len(fs, dirent, &rec_len);
		cd->pctx.dirent = dirent;
		cd->pctx.num = offset;
		if (((offset + rec_len) > fs->blocksize) ||
		    (rec_len < 12) ||
		    ((rec_len % 4) != 0) ||
		    (((dirent->name_len & (unsigned) 0xFF)+8) > rec_len)) {
			if (fix_problem(ctx, PR_2_DIR_CORRUPTED, &cd->pctx)) {
				salvage_directory(fs, dirent, prev, &offset);
				dir_modified++;
				continue;
			} else
				goto abort_free_dict;
		}

		if (dot_state == 0) {
			if (check_dot(ctx, dirent, ino, &cd->pctx))
				dir_modified++;
		} else if (dot_state == 1) {
			ret = check_dotdot(ctx, dirent, ino, &cd->pctx);
			if (ret < 0)
				goto abort_free_dict;
			if (ret)
				dir_modified++;
		} else if (dirent->inode == ino) {
			problem = PR_2_LINK_DOT;
			if (fix_problem(ctx, PR_2_LINK_DOT, &cd->pctx)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			}
		}
		if (!dirent->inode)
			goto next;

		/*
		 * Make sure the inode listed is a legal one.
		 */
		if (((dirent->inode != EXT2_ROOT_INO) &&
		     (dirent->inode < EXT2_FIRST_INODE(fs->super))) ||
		    (dirent->inode > fs->super->s_inodes_count)) {
			problem = PR_2_BAD_INO;
		} else if (ctx->inode_bb_map &&
			   (ext2fs_test_inode_bitmap2(ctx->inode_bb_map,
						     dirent->inode))) {
			/*
			 * If the inode is in a bad block, offer to
			 * clear it.
			 */
			problem = PR_2_BB_INODE;
		} else if ((dot_state > 1) &&
			   ((dirent->name_len & 0xFF) == 1) &&
			   (dirent->name[0] == '.')) {
			/*
			 * If there's a '.' entry in anything other
			 * than the first directory entry, it's a
			 * duplicate entry that should be removed.
			 */
			problem = PR_2_DUP_DOT;
		} else if ((dot_state > 1) &&
			   ((dirent->name_len & 0xFF) == 2) &&
			   (dirent->name[0] == '.') &&
			   (dirent->name[1] == '.')) {
			/*
			 * If there's a '..' entry in anything other
			 * than the second directory entry, it's a
			 * duplicate entry that should be removed.
			 */
			problem = PR_2_DUP_DOT_DOT;
		} else if ((dot_state > 1) &&
			   (dirent->inode == EXT2_ROOT_INO)) {
			/*
			 * Don't allow links to the root directory.
			 * We check this specially to make sure we
			 * catch this error case even if the root
			 * directory hasn't been created yet.
			 */
			problem = PR_2_LINK_ROOT;
		} else if ((dot_state > 1) &&
			   (dirent->name_len & 0xFF) == 0) {
			/*
			 * Don't allow zero-length directory names.
			 */
			problem = PR_2_NULL_NAME;
		}

		if (problem) {
			if (fix_problem(ctx, problem, &cd->pctx)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		}

		/*
		 * If the inode was marked as having bad fields in
		 * pass1, process it and offer to fix/clear it.
		 * (We wait until now so that we can display the
		 * pathname to the user.)
		 */
		if (ctx->inode_bad_map &&
		    ext2fs_test_inode_bitmap2(ctx->inode_bad_map,
					     dirent->inode)) {
			if (e2fsck_process_bad_inode(ctx, ino,
						     dirent->inode,
						     buf + fs->blocksize)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			}
			if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
				return DIRENT_ABORT;
		}

		group = ext2fs_group_of_ino(fs, dirent->inode);
		first_unused_inode = group * fs->super->s_inodes_per_group +
					1 + fs->super->s_inodes_per_group -
					ext2fs_bg_itable_unused(fs, group);
		cd->pctx.group = group;

		/*
		 * Check if the inode was missed out because
		 * _INODE_UNINIT flag was set or bg_itable_unused was
		 * incorrect.  If so, clear the _INODE_UNINIT flag and
		 * restart e2fsck.  In the future it would be nice if
		 * we could call a function in pass1.c that checks the
		 * newly visible inodes.
		 */
		if (ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT)) {
			pctx.num = dirent->inode;
			if (fix_problem(ctx, PR_2_INOREF_BG_INO_UNINIT,
					&cd->pctx)){
				ext2fs_bg_flags_clear(fs, group,
						      EXT2_BG_INODE_UNINIT);
				ext2fs_mark_super_dirty(fs);
				ctx->flags |= E2F_FLAG_RESTART_LATER;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		} else if (dirent->inode >= first_unused_inode) {
			pctx.num = dirent->inode;
			if (fix_problem(ctx, PR_2_INOREF_IN_UNUSED, &cd->pctx)){
				ext2fs_bg_itable_unused_set(fs, group, 0);
				ext2fs_mark_super_dirty(fs);
				ctx->flags |= E2F_FLAG_RESTART_LATER;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		}

		/* 
		 * Offer to clear unused inodes; if we are going to be
		 * restarting the scan due to bg_itable_unused being
		 * wrong, then don't clear any inodes to avoid zapping
		 * inodes that were skipped during pass1 due to an
		 * incorrect bg_itable_unused; we'll get any real
		 * problems after we restart.
		 */
		if (!(ctx->flags & E2F_FLAG_RESTART_LATER) &&
		    !(ext2fs_test_inode_bitmap2(ctx->inode_used_map,
						dirent->inode)))
			problem = PR_2_UNUSED_INODE;

		if (problem) {
			if (fix_problem(ctx, problem, &cd->pctx)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		}

		if (check_name(ctx, dirent, ino, &cd->pctx))
			dir_modified++;

		if (check_filetype(ctx, dirent, ino, &cd->pctx))
			dir_modified++;

#ifdef ENABLE_HTREE
		if (dx_db) {
			ext2fs_dirhash(dx_dir->hashversion, dirent->name,
				       (dirent->name_len & 0xFF),
				       fs->super->s_hash_seed, &hash, 0);
			if (hash < dx_db->min_hash)
				dx_db->min_hash = hash;
			if (hash > dx_db->max_hash)
				dx_db->max_hash = hash;
		}
#endif

		/*
		 * If this is a directory, then mark its parent in its
		 * dir_info structure.  If the parent field is already
		 * filled in, then this directory has more than one
		 * hard link.  We assume the first link is correct,
		 * and ask the user if he/she wants to clear this one.
		 */
		if ((dot_state > 1) &&
		    (ext2fs_test_inode_bitmap2(ctx->inode_dir_map,
					      dirent->inode))) {
			if (e2fsck_dir_info_get_parent(ctx, dirent->inode,
						       &subdir_parent)) {
				cd->pctx.ino = dirent->inode;
				fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx);
				goto abort_free_dict;
			}
			if (subdir_parent) {
				cd->pctx.ino2 = subdir_parent;
				if (fix_problem(ctx, PR_2_LINK_DIR,
						&cd->pctx)) {
					dirent->inode = 0;
					dir_modified++;
					goto next;
				}
				cd->pctx.ino2 = 0;
			} else {
				(void) e2fsck_dir_info_set_parent(ctx,
						  dirent->inode, ino);
			}
		}

		if (dups_found) {
			;
		} else if (dict_lookup(&de_dict, dirent)) {
			clear_problem_context(&pctx);
			pctx.ino = ino;
			pctx.dirent = dirent;
			fix_problem(ctx, PR_2_REPORT_DUP_DIRENT, &pctx);
			e2fsck_rehash_dir_later(ctx, ino);
			dups_found++;
		} else
			dict_alloc_insert(&de_dict, dirent, dirent);

		ext2fs_icount_increment(ctx->inode_count, dirent->inode,
					&links);
		if (links > 1)
			ctx->fs_links_count++;
		ctx->fs_total_count++;
	next:
		prev = dirent;
		if (dir_modified)
			(void) ext2fs_get_rec_len(fs, dirent, &rec_len);
		offset += rec_len;
		dot_state++;
	} while (offset < fs->blocksize - de_csum_size);
#if 0
	printf("\n");
#endif
#ifdef ENABLE_HTREE
	if (dx_db) {
#ifdef DX_DEBUG
		printf("db_block %d, type %d, min_hash 0x%0x, max_hash 0x%0x\n",
		       db->blockcnt, dx_db->type,
		       dx_db->min_hash, dx_db->max_hash);
#endif
		cd->pctx.dir = cd->pctx.ino;
		if ((dx_db->type == DX_DIRBLOCK_ROOT) ||
		    (dx_db->type == DX_DIRBLOCK_NODE))
			parse_int_node(fs, db, cd, dx_dir, buf, failed_csum);
	}
#endif /* ENABLE_HTREE */

	if (offset != fs->blocksize - de_csum_size) {
		cd->pctx.num = rec_len - (fs->blocksize - de_csum_size) +
			       offset;
		if (fix_problem(ctx, PR_2_FINAL_RECLEN, &cd->pctx)) {
			dirent->rec_len = cd->pctx.num;
			dir_modified++;
		}
	}
	if (dir_modified) {
		/* leaf block with no tail?  Rehash dirs later. */
		if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
				EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
		    is_leaf &&
		    !ext2fs_dirent_has_tail(fs, (struct ext2_dir_entry *)buf))
			e2fsck_rehash_dir_later(ctx, ino);

write_and_fix:
		if (e2fsck_dir_will_be_rehashed(ctx, ino))
			ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
		cd->pctx.errcode = ext2fs_write_dir_block4(fs, block_nr, buf,
							   0, ino);
		if (e2fsck_dir_will_be_rehashed(ctx, ino))
			ctx->fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
		if (cd->pctx.errcode) {
			if (!fix_problem(ctx, PR_2_WRITE_DIRBLOCK,
					 &cd->pctx))
				goto abort_free_dict;
		}
		ext2fs_mark_changed(fs);
	} else if (is_leaf && failed_csum && !dir_modified) {
		/*
		 * If a leaf node that fails csum makes it this far without
		 * alteration, ask the user if the checksum should be fixed.
		 */
		if (fix_problem(ctx, PR_2_LEAF_NODE_ONLY_CSUM_INVALID,
				&cd->pctx))
			goto write_and_fix;
	}
	dict_free_nodes(&de_dict);
	return 0;
abort_free_dict:
	ctx->flags |= E2F_FLAG_ABORT;
	dict_free_nodes(&de_dict);
	return DIRENT_ABORT;
}
Ejemplo n.º 2
0
void e2fsck_pass4(e2fsck_t ctx)
{
	ext2_filsys fs = ctx->fs;
	ext2_ino_t	i;
	struct ext2_inode	*inode;
#ifdef RESOURCE_TRACK
	struct resource_track	rtrack;
#endif
	struct problem_context	pctx;
	__u16	link_count, link_counted;
	char	*buf = 0;
	dgrp_t	group, maxgroup;

	init_resource_track(&rtrack, ctx->fs->io);

#ifdef MTRACE
	mtrace_print("Pass 4");
#endif

	clear_problem_context(&pctx);

	if (!(ctx->options & E2F_OPT_PREEN))
		fix_problem(ctx, PR_4_PASS_HEADER, &pctx);

	group = 0;
	maxgroup = fs->group_desc_count;
	if (ctx->progress)
		if ((ctx->progress)(ctx, 4, 0, maxgroup))
			return;

	inode = e2fsck_allocate_memory(ctx, EXT2_INODE_SIZE(fs->super),
				       "scratch inode");

	/* Protect loop from wrap-around if s_inodes_count maxed */
	for (i=1; i <= fs->super->s_inodes_count && i > 0; i++) {
		int isdir;

		if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
			goto errout;
		if ((i % fs->super->s_inodes_per_group) == 0) {
			group++;
			if (ctx->progress)
				if ((ctx->progress)(ctx, 4, group, maxgroup))
					goto errout;
		}
		if (i == EXT2_BAD_INO ||
		    (i > EXT2_ROOT_INO && i < EXT2_FIRST_INODE(fs->super)))
			continue;
		if (!(ext2fs_test_inode_bitmap2(ctx->inode_used_map, i)) ||
		    (ctx->inode_imagic_map &&
		     ext2fs_test_inode_bitmap2(ctx->inode_imagic_map, i)) ||
		    (ctx->inode_bb_map &&
		     ext2fs_test_inode_bitmap2(ctx->inode_bb_map, i)))
			continue;
		ext2fs_icount_fetch(ctx->inode_link_info, i, &link_count);
		ext2fs_icount_fetch(ctx->inode_count, i, &link_counted);
		if (link_counted == 0) {
			if (!buf)
				buf = e2fsck_allocate_memory(ctx,
				     fs->blocksize, "bad_inode buffer");
			if (e2fsck_process_bad_inode(ctx, 0, i, buf))
				continue;
			if (disconnect_inode(ctx, i, inode))
				continue;
			ext2fs_icount_fetch(ctx->inode_link_info, i,
					    &link_count);
			ext2fs_icount_fetch(ctx->inode_count, i,
					    &link_counted);
		}
		isdir = ext2fs_test_inode_bitmap2(ctx->inode_dir_map, i);
		if (isdir && (link_counted > EXT2_LINK_MAX))
			link_counted = 1;
		if (link_counted != link_count) {
			e2fsck_read_inode(ctx, i, inode, "pass4");
			pctx.ino = i;
			pctx.inode = inode;
			if ((link_count != inode->i_links_count) && !isdir &&
			    (inode->i_links_count <= EXT2_LINK_MAX)) {
				pctx.num = link_count;
				fix_problem(ctx,
					    PR_4_INCONSISTENT_COUNT, &pctx);
			}
			pctx.num = link_counted;
			/* i_link_count was previously exceeded, but no longer
			 * is, fix this but don't consider it an error */
			if ((isdir && link_counted > 1 &&
			     (inode->i_flags & EXT2_INDEX_FL) &&
			     link_count == 1 && !(ctx->options & E2F_OPT_NO)) ||
			    fix_problem(ctx, PR_4_BAD_REF_COUNT, &pctx)) {
				inode->i_links_count = link_counted;
				e2fsck_write_inode(ctx, i, inode, "pass4");
			}
		}
	}
	ext2fs_free_icount(ctx->inode_link_info); ctx->inode_link_info = 0;
	ext2fs_free_icount(ctx->inode_count); ctx->inode_count = 0;
	ext2fs_free_inode_bitmap(ctx->inode_bb_map);
	ctx->inode_bb_map = 0;
	ext2fs_free_inode_bitmap(ctx->inode_imagic_map);
	ctx->inode_imagic_map = 0;
errout:
	if (buf)
		ext2fs_free_mem(&buf);

	ext2fs_free_mem(&inode);
	print_resource_track(ctx, _("Pass 4"), &rtrack, ctx->fs->io);
}
Ejemplo n.º 3
0
void e2fsck_pass4(e2fsck_t ctx)
{
	ext2_filsys fs = ctx->fs;
	ext2_ino_t	i;
	struct ext2_inode	inode;
#ifdef RESOURCE_TRACK
	struct resource_track	rtrack;
#endif
	struct problem_context	pctx;
	__u16	link_count, link_counted;
	char	*buf = 0;
	int	group, maxgroup;
	
#ifdef RESOURCE_TRACK
	init_resource_track(&rtrack);
#endif

#ifdef MTRACE
	mtrace_print("Pass 4");
#endif

	clear_problem_context(&pctx);

	if (!(ctx->options & E2F_OPT_PREEN))
		fix_problem(ctx, PR_4_PASS_HEADER, &pctx);

	group = 0;
	maxgroup = fs->group_desc_count;
	if (ctx->progress)
		if ((ctx->progress)(ctx, 4, 0, maxgroup))
			return;

	/* Protect loop from wrap-around if s_inodes_count maxed */
	for (i=1; i <= fs->super->s_inodes_count && i > 0; i++) {
		if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
			goto errout;
		if ((i % fs->super->s_inodes_per_group) == 0) {
			group++;
			if (ctx->progress)
				if ((ctx->progress)(ctx, 4, group, maxgroup))
					goto errout;
		}
		if (i == EXT2_BAD_INO ||
		    (i > EXT2_ROOT_INO && i < EXT2_FIRST_INODE(fs->super)))
			continue;
		if (!(ext2fs_test_inode_bitmap(ctx->inode_used_map, i)) ||
		    (ctx->inode_imagic_map &&
		     ext2fs_test_inode_bitmap(ctx->inode_imagic_map, i)) ||
		    (ctx->inode_bb_map &&
		     ext2fs_test_inode_bitmap(ctx->inode_bb_map, i)))
			continue;
		ext2fs_icount_fetch(ctx->inode_link_info, i, &link_count);
		ext2fs_icount_fetch(ctx->inode_count, i, &link_counted);
		if (link_counted == 0) {
			if (!buf)
				buf = e2fsck_allocate_memory(ctx,
				     fs->blocksize, "bad_inode buffer");
			if (e2fsck_process_bad_inode(ctx, 0, i, buf))
				continue;
			if (disconnect_inode(ctx, i))
				continue;
			ext2fs_icount_fetch(ctx->inode_link_info, i,
					    &link_count);
			ext2fs_icount_fetch(ctx->inode_count, i,
					    &link_counted);
		}
		if (link_counted != link_count) {
			e2fsck_read_inode(ctx, i, &inode, "pass4");
			pctx.ino = i;
			pctx.inode = &inode;
			if (link_count != inode.i_links_count) {
				pctx.num = link_count;
				fix_problem(ctx,
					    PR_4_INCONSISTENT_COUNT, &pctx);
			}
			pctx.num = link_counted;
			if (fix_problem(ctx, PR_4_BAD_REF_COUNT, &pctx)) {
				inode.i_links_count = link_counted;
				e2fsck_write_inode(ctx, i, &inode, "pass4");
			}
		}
	}
	ext2fs_free_icount(ctx->inode_link_info); ctx->inode_link_info = 0;
	ext2fs_free_icount(ctx->inode_count); ctx->inode_count = 0;
	ext2fs_free_inode_bitmap(ctx->inode_bb_map);
	ctx->inode_bb_map = 0;
	ext2fs_free_inode_bitmap(ctx->inode_imagic_map);
	ctx->inode_imagic_map = 0;
errout:
	if (buf)
		ext2fs_free_mem(&buf);
#ifdef RESOURCE_TRACK
	if (ctx->options & E2F_OPT_TIME2) {
		e2fsck_clear_progbar(ctx);
		print_resource_track(_("Pass 4"), &rtrack);
	}
#endif
}
Ejemplo n.º 4
0
static int check_dir_block(ext2_filsys fs,
			   struct ext2_db_entry *db,
			   void *priv_data)
{
 	struct dx_dir_info	*dx_dir;
#ifdef ENABLE_HTREE
	struct dx_dirblock_info	*dx_db = 0;
#endif 
	struct ext2_dir_entry 	*dirent, *prev;
	ext2_dirhash_t		hash;
	unsigned int		offset = 0;
	const char *		old_op;
	int			dir_modified = 0;
	int			dot_state;
	unsigned int		rec_len;
	blk_t			block_nr = db->blk;
	ext2_ino_t 		ino = db->ino;
	ext2_ino_t 		subdir_parent;
	__u16			links;
	struct check_dir_struct	*cd;
	char 			*buf;
	e2fsck_t		ctx;
	int			problem;
	struct ext2_dx_root_info *root;
	struct ext2_dx_countlimit *limit;
	static dict_t de_dict;
	struct problem_context	pctx;
	int	dups_found = 0;
	int	ret;

	cd = (struct check_dir_struct *) priv_data;
	buf = cd->buf;
	ctx = cd->ctx;

	if (ctx->flags & E2F_FLAG_SIGNAL_MASK || ctx->flags & E2F_FLAG_RESTART)
		return DIRENT_ABORT;

	if (ctx->progress && (ctx->progress)(ctx, 2, cd->count++, cd->max))
		return DIRENT_ABORT;

	if (!(ext2fs_test_inode_bitmap(ctx->inode_used_map, ino)))
		return 0;

	cd->pctx.ino = ino;
	cd->pctx.blk = block_nr;
	cd->pctx.blkcount = db->blockcnt;
	cd->pctx.ino2 = 0;
	cd->pctx.dirent = 0;
	cd->pctx.num = 0;

	if (db->blk == 0) {
		if (allocate_dir_block(ctx, db, buf, &cd->pctx))
			return 0;
		block_nr = db->blk;
	}

	if (db->blockcnt)
		dot_state = 2;
	else
		dot_state = 0;

	if (ctx->dirs_to_hash &&
	    ext2fs_u32_list_test(ctx->dirs_to_hash, ino))
		dups_found++;

#if 0
	printf("In process_dir_block block %lu, #%d, inode %lu\n", block_nr,
	       db->blockcnt, ino);
#endif

	old_op = ehandler_operation(_("reading directory block"));
	cd->pctx.errcode = ext2fs_read_dir_block(fs, block_nr, buf);
	ehandler_operation(0);
	if (cd->pctx.errcode == EXT2_ET_DIR_CORRUPTED)
		cd->pctx.errcode = 0; 
	if (cd->pctx.errcode) {
		if (!fix_problem(ctx, PR_2_READ_DIRBLOCK, &cd->pctx)) {
			ctx->flags |= E2F_FLAG_ABORT;
			return DIRENT_ABORT;
		}
		memset(buf, 0, fs->blocksize);
	}
#ifdef ENABLE_HTREE
	dx_dir = e2fsck_get_dx_dir_info(ctx, ino);
	if (dx_dir && dx_dir->numblocks) {
		if (db->blockcnt >= dx_dir->numblocks) {
			if (fix_problem(ctx, PR_2_UNEXPECTED_HTREE_BLOCK,
					&pctx)) {
				clear_htree(ctx, ino);
				dx_dir->numblocks = 0;
				dx_db = 0;
				goto out_htree;
			}
			fatal_error(ctx, _("Can not continue."));
		}
		dx_db = &dx_dir->dx_block[db->blockcnt];
		dx_db->type = DX_DIRBLOCK_LEAF;
		dx_db->phys = block_nr;
		dx_db->min_hash = ~0;
		dx_db->max_hash = 0;

		dirent = (struct ext2_dir_entry *) buf;
		(void) ext2fs_get_rec_len(fs, dirent, &rec_len);
		limit = (struct ext2_dx_countlimit *) (buf+8);
		if (db->blockcnt == 0) {
			root = (struct ext2_dx_root_info *) (buf + 24);
			dx_db->type = DX_DIRBLOCK_ROOT;
			dx_db->flags |= DX_FLAG_FIRST | DX_FLAG_LAST;
			if ((root->reserved_zero ||
			     root->info_length < 8 ||
			     root->indirect_levels > 1) &&
			    fix_problem(ctx, PR_2_HTREE_BAD_ROOT, &cd->pctx)) {
				clear_htree(ctx, ino);
				dx_dir->numblocks = 0;
				dx_db = 0;
			}
			dx_dir->hashversion = root->hash_version;
			if ((dx_dir->hashversion <= EXT2_HASH_TEA) &&
			    (fs->super->s_flags & EXT2_FLAGS_UNSIGNED_HASH))
				dx_dir->hashversion += 3;
			dx_dir->depth = root->indirect_levels + 1;
		} else if ((dirent->inode == 0) &&
			   (rec_len == fs->blocksize) &&
			   (dirent->name_len == 0) &&
			   (ext2fs_le16_to_cpu(limit->limit) ==
			    ((fs->blocksize-8) /
			     sizeof(struct ext2_dx_entry))))
			dx_db->type = DX_DIRBLOCK_NODE;
	}
out_htree:
#endif 

	dict_init(&de_dict, DICTCOUNT_T_MAX, dict_de_cmp);
	prev = 0;
	do {
		int group;
		ext2_ino_t first_unused_inode;

		problem = 0;
		dirent = (struct ext2_dir_entry *) (buf + offset);
		(void) ext2fs_get_rec_len(fs, dirent, &rec_len);
		cd->pctx.dirent = dirent;
		cd->pctx.num = offset;
		if (((offset + rec_len) > fs->blocksize) ||
		    (rec_len < 12) ||
		    ((rec_len % 4) != 0) ||
		    (((dirent->name_len & (unsigned) 0xFF)+8) > rec_len)) {
			if (fix_problem(ctx, PR_2_DIR_CORRUPTED, &cd->pctx)) {
				salvage_directory(fs, dirent, prev, &offset);
				dir_modified++;
				continue;
			} else
				goto abort_free_dict;
		}
		if ((dirent->name_len & 0xFF) > EXT2_NAME_LEN) {
			if (fix_problem(ctx, PR_2_FILENAME_LONG, &cd->pctx)) {
				dirent->name_len = EXT2_NAME_LEN;
				dir_modified++;
			}
		}

		if (dot_state == 0) {
			if (check_dot(ctx, dirent, ino, &cd->pctx))
				dir_modified++;
		} else if (dot_state == 1) {
			ret = check_dotdot(ctx, dirent, ino, &cd->pctx);
			if (ret < 0)
				goto abort_free_dict;
			if (ret)
				dir_modified++;
		} else if (dirent->inode == ino) {
			problem = PR_2_LINK_DOT;
			if (fix_problem(ctx, PR_2_LINK_DOT, &cd->pctx)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			}
		}
		if (!dirent->inode)
			goto next;

		if (((dirent->inode != EXT2_ROOT_INO) &&
		     (dirent->inode < EXT2_FIRST_INODE(fs->super))) ||
		    (dirent->inode > fs->super->s_inodes_count)) {
			problem = PR_2_BAD_INO;
		} else if (ctx->inode_bb_map &&
			   (ext2fs_test_inode_bitmap(ctx->inode_bb_map,
						     dirent->inode))) {
			problem = PR_2_BB_INODE;
		} else if ((dot_state > 1) &&
			   ((dirent->name_len & 0xFF) == 1) &&
			   (dirent->name[0] == '.')) {
			problem = PR_2_DUP_DOT;
		} else if ((dot_state > 1) &&
			   ((dirent->name_len & 0xFF) == 2) &&
			   (dirent->name[0] == '.') &&
			   (dirent->name[1] == '.')) {
			problem = PR_2_DUP_DOT_DOT;
		} else if ((dot_state > 1) &&
			   (dirent->inode == EXT2_ROOT_INO)) {
			problem = PR_2_LINK_ROOT;
		} else if ((dot_state > 1) &&
			   (dirent->name_len & 0xFF) == 0) {
			problem = PR_2_NULL_NAME;
		}

		if (problem) {
			if (fix_problem(ctx, problem, &cd->pctx)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		}

		if (ctx->inode_bad_map &&
		    ext2fs_test_inode_bitmap(ctx->inode_bad_map,
					     dirent->inode)) {
			if (e2fsck_process_bad_inode(ctx, ino,
						     dirent->inode,
						     buf + fs->blocksize)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			}
			if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
				return DIRENT_ABORT;
		}

		group = ext2fs_group_of_ino(fs, dirent->inode);
		first_unused_inode = group * fs->super->s_inodes_per_group +
					1 + fs->super->s_inodes_per_group -
					fs->group_desc[group].bg_itable_unused;
		cd->pctx.group = group;

		if (fs->group_desc[group].bg_flags & EXT2_BG_INODE_UNINIT) {
			pctx.num = dirent->inode;
			if (fix_problem(ctx, PR_2_INOREF_BG_INO_UNINIT,
					&cd->pctx)){
				fs->group_desc[group].bg_flags &=
					~EXT2_BG_INODE_UNINIT;
				ext2fs_mark_super_dirty(fs);
				ctx->flags |= E2F_FLAG_RESTART_LATER;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		} else if (dirent->inode >= first_unused_inode) {
			pctx.num = dirent->inode;
			if (fix_problem(ctx, PR_2_INOREF_IN_UNUSED, &cd->pctx)){
				fs->group_desc[group].bg_itable_unused = 0;
				ext2fs_mark_super_dirty(fs);
				ctx->flags |= E2F_FLAG_RESTART_LATER;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		}

		if (!(ctx->flags & E2F_FLAG_RESTART_LATER) &&
		    !(ext2fs_test_inode_bitmap(ctx->inode_used_map,
					       dirent->inode)))
			problem = PR_2_UNUSED_INODE;

		if (problem) {
			if (fix_problem(ctx, problem, &cd->pctx)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		}

		if (check_name(ctx, dirent, ino, &cd->pctx))
			dir_modified++;

		if (check_filetype(ctx, dirent, ino, &cd->pctx))
			dir_modified++;

#ifdef ENABLE_HTREE
		if (dx_db) {
			ext2fs_dirhash(dx_dir->hashversion, dirent->name,
				       (dirent->name_len & 0xFF),
				       fs->super->s_hash_seed, &hash, 0);
			if (hash < dx_db->min_hash)
				dx_db->min_hash = hash;
			if (hash > dx_db->max_hash)
				dx_db->max_hash = hash;
		}
#endif

		if ((dot_state > 1) &&
		    (ext2fs_test_inode_bitmap(ctx->inode_dir_map,
					      dirent->inode))) {
			if (e2fsck_dir_info_get_parent(ctx, dirent->inode,
						       &subdir_parent)) {
				cd->pctx.ino = dirent->inode;
				fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx);
				goto abort_free_dict;
			}
			if (subdir_parent) {
				cd->pctx.ino2 = subdir_parent;
				if (fix_problem(ctx, PR_2_LINK_DIR,
						&cd->pctx)) {
					dirent->inode = 0;
					dir_modified++;
					goto next;
				}
				cd->pctx.ino2 = 0;
			} else {
				(void) e2fsck_dir_info_set_parent(ctx,
						  dirent->inode, ino);
			}
		}

		if (dups_found) {
			;
		} else if (dict_lookup(&de_dict, dirent)) {
			clear_problem_context(&pctx);
			pctx.ino = ino;
			pctx.dirent = dirent;
			fix_problem(ctx, PR_2_REPORT_DUP_DIRENT, &pctx);
			if (!ctx->dirs_to_hash)
				ext2fs_u32_list_create(&ctx->dirs_to_hash, 50);
			if (ctx->dirs_to_hash)
				ext2fs_u32_list_add(ctx->dirs_to_hash, ino);
			dups_found++;
		} else
			dict_alloc_insert(&de_dict, dirent, dirent);

		ext2fs_icount_increment(ctx->inode_count, dirent->inode,
					&links);
		if (links > 1)
			ctx->fs_links_count++;
		ctx->fs_total_count++;
	next:
		prev = dirent;
		if (dir_modified)
			(void) ext2fs_get_rec_len(fs, dirent, &rec_len);
		offset += rec_len;
		dot_state++;
	} while (offset < fs->blocksize);
#if 0
	printf("\n");
#endif
#ifdef ENABLE_HTREE
	if (dx_db) {
#ifdef DX_DEBUG
		printf("db_block %d, type %d, min_hash 0x%0x, max_hash 0x%0x\n",
		       db->blockcnt, dx_db->type,
		       dx_db->min_hash, dx_db->max_hash);
#endif
		cd->pctx.dir = cd->pctx.ino;
		if ((dx_db->type == DX_DIRBLOCK_ROOT) ||
		    (dx_db->type == DX_DIRBLOCK_NODE))
			parse_int_node(fs, db, cd, dx_dir, buf);
	}
#endif 
	if (offset != fs->blocksize) {
		cd->pctx.num = rec_len - fs->blocksize + offset;
		if (fix_problem(ctx, PR_2_FINAL_RECLEN, &cd->pctx)) {
			dirent->rec_len = cd->pctx.num;
			dir_modified++;
		}
	}
	if (dir_modified) {
		cd->pctx.errcode = ext2fs_write_dir_block(fs, block_nr, buf);
		if (cd->pctx.errcode) {
			if (!fix_problem(ctx, PR_2_WRITE_DIRBLOCK,
					 &cd->pctx))
				goto abort_free_dict;
		}
		ext2fs_mark_changed(fs);
	}
	dict_free_nodes(&de_dict);
	return 0;
abort_free_dict:
	ctx->flags |= E2F_FLAG_ABORT;
	dict_free_nodes(&de_dict);
	return DIRENT_ABORT;
}
Ejemplo n.º 5
0
static int check_dir_block(ext2_filsys fs,
                           struct ext2_db_entry *db,
                           void *priv_data)
{
    struct dir_info		*subdir, *dir;
    struct ext2_dir_entry 	*dirent;
    int			offset = 0;
    int			dir_modified = 0;
    int			dot_state;
    blk_t			block_nr = db->blk;
    ext2_ino_t 		ino = db->ino;
    __u16			links;
    struct check_dir_struct	*cd;
    char 			*buf;
    e2fsck_t		ctx;
    int			problem;

    cd = (struct check_dir_struct *) priv_data;
    buf = cd->buf;
    ctx = cd->ctx;

    if (ctx->progress)
        if ((ctx->progress)(ctx, 2, cd->count++, cd->max))
            return DIRENT_ABORT;

    /*
     * Make sure the inode is still in use (could have been
     * deleted in the duplicate/bad blocks pass.
     */
    if (!(ext2fs_test_inode_bitmap(ctx->inode_used_map, ino)))
        return 0;

    cd->pctx.ino = ino;
    cd->pctx.blk = block_nr;
    cd->pctx.blkcount = db->blockcnt;
    cd->pctx.ino2 = 0;
    cd->pctx.dirent = 0;
    cd->pctx.num = 0;

    if (db->blk == 0) {
        if (allocate_dir_block(ctx, db, buf, &cd->pctx))
            return 0;
        block_nr = db->blk;
    }

    if (db->blockcnt)
        dot_state = 2;
    else
        dot_state = 0;

#if 0
    printf("In process_dir_block block %lu, #%d, inode %lu\n", block_nr,
           db->blockcnt, ino);
#endif

    cd->pctx.errcode = ext2fs_read_dir_block(fs, block_nr, buf);
    if (cd->pctx.errcode == EXT2_ET_DIR_CORRUPTED)
        cd->pctx.errcode = 0; /* We'll handle this ourselves */
    if (cd->pctx.errcode) {
        if (!fix_problem(ctx, PR_2_READ_DIRBLOCK, &cd->pctx)) {
            ctx->flags |= E2F_FLAG_ABORT;
            return DIRENT_ABORT;
        }
        memset(buf, 0, fs->blocksize);
    }

    do {
        dot_state++;
        problem = 0;
        dirent = (struct ext2_dir_entry *) (buf + offset);
        cd->pctx.dirent = dirent;
        cd->pctx.num = offset;
        if (((offset + dirent->rec_len) > fs->blocksize) ||
                (dirent->rec_len < 12) ||
                ((dirent->rec_len % 4) != 0) ||
                (((dirent->name_len & 0xFF)+8) > dirent->rec_len)) {
            if (fix_problem(ctx, PR_2_DIR_CORRUPTED, &cd->pctx)) {
                dirent->rec_len = fs->blocksize - offset;
                dirent->name_len = 0;
                dirent->inode = 0;
                dir_modified++;
            } else
                return DIRENT_ABORT;
        }
        if ((dirent->name_len & 0xFF) > EXT2_NAME_LEN) {
            if (fix_problem(ctx, PR_2_FILENAME_LONG, &cd->pctx)) {
                dirent->name_len = EXT2_NAME_LEN;
                dir_modified++;
            }
        }

        if (dot_state == 1) {
            if (check_dot(ctx, dirent, ino, &cd->pctx))
                dir_modified++;
        } else if (dot_state == 2) {
            dir = e2fsck_get_dir_info(ctx, ino);
            if (!dir) {
                fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx);
                ctx->flags |= E2F_FLAG_ABORT;
                return DIRENT_ABORT;
            }
            if (check_dotdot(ctx, dirent, dir, &cd->pctx))
                dir_modified++;
        } else if (dirent->inode == ino) {
            problem = PR_2_LINK_DOT;
            if (fix_problem(ctx, PR_2_LINK_DOT, &cd->pctx)) {
                dirent->inode = 0;
                dir_modified++;
                goto next;
            }
        }
        if (!dirent->inode)
            goto next;

        /*
         * Make sure the inode listed is a legal one.
         */
        if (((dirent->inode != EXT2_ROOT_INO) &&
                (dirent->inode < EXT2_FIRST_INODE(fs->super))) ||
                (dirent->inode > fs->super->s_inodes_count)) {
            problem = PR_2_BAD_INO;
        } else if (!(ext2fs_test_inode_bitmap(ctx->inode_used_map,
                                              dirent->inode))) {
            /*
             * If the inode is unused, offer to clear it.
             */
            problem = PR_2_UNUSED_INODE;
        } else if (ctx->inode_bb_map &&
                   (ext2fs_test_inode_bitmap(ctx->inode_bb_map,
                                             dirent->inode))) {
            /*
             * If the inode is in a bad block, offer to
             * clear it.
             */
            problem = PR_2_BB_INODE;
        } else if ((dot_state > 2) &&
                   ((dirent->name_len & 0xFF) == 1) &&
                   (dirent->name[0] == '.')) {
            /*
             * If there's a '.' entry in anything other
             * than the first directory entry, it's a
             * duplicate entry that should be removed.
             */
            problem = PR_2_DUP_DOT;
        } else if ((dot_state > 2) &&
                   ((dirent->name_len & 0xFF) == 2) &&
                   (dirent->name[0] == '.') &&
                   (dirent->name[1] == '.')) {
            /*
             * If there's a '..' entry in anything other
             * than the second directory entry, it's a
             * duplicate entry that should be removed.
             */
            problem = PR_2_DUP_DOT_DOT;
        } else if ((dot_state > 2) &&
                   (dirent->inode == EXT2_ROOT_INO)) {
            /*
             * Don't allow links to the root directory.
             * We check this specially to make sure we
             * catch this error case even if the root
             * directory hasn't been created yet.
             */
            problem = PR_2_LINK_ROOT;
        } else if ((dot_state > 2) &&
                   (dirent->name_len & 0xFF) == 0) {
            /*
             * Don't allow zero-length directory names.
             */
            problem = PR_2_NULL_NAME;
        }

        if (problem) {
            if (fix_problem(ctx, problem, &cd->pctx)) {
                dirent->inode = 0;
                dir_modified++;
                goto next;
            } else {
                ext2fs_unmark_valid(fs);
                if (problem == PR_2_BAD_INO)
                    goto next;
            }
        }

        /*
         * If the inode was marked as having bad fields in
         * pass1, process it and offer to fix/clear it.
         * (We wait until now so that we can display the
         * pathname to the user.)
         */
        if (ctx->inode_bad_map &&
                ext2fs_test_inode_bitmap(ctx->inode_bad_map,
                                         dirent->inode)) {
            if (e2fsck_process_bad_inode(ctx, ino,
                                         dirent->inode)) {
                dirent->inode = 0;
                dir_modified++;
                goto next;
            }
            if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
                return DIRENT_ABORT;
        }

        if (check_name(ctx, dirent, ino, &cd->pctx))
            dir_modified++;

        if (check_filetype(ctx, dirent, ino, &cd->pctx))
            dir_modified++;

        /*
         * If this is a directory, then mark its parent in its
         * dir_info structure.  If the parent field is already
         * filled in, then this directory has more than one
         * hard link.  We assume the first link is correct,
         * and ask the user if he/she wants to clear this one.
         */
        if ((dot_state > 2) &&
                (ext2fs_test_inode_bitmap(ctx->inode_dir_map,
                                          dirent->inode))) {
            subdir = e2fsck_get_dir_info(ctx, dirent->inode);
            if (!subdir) {
                cd->pctx.ino = dirent->inode;
                fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx);
                ctx->flags |= E2F_FLAG_ABORT;
                return DIRENT_ABORT;
            }
            if (subdir->parent) {
                cd->pctx.ino2 = subdir->parent;
                if (fix_problem(ctx, PR_2_LINK_DIR,
                                &cd->pctx)) {
                    dirent->inode = 0;
                    dir_modified++;
                    goto next;
                }
                cd->pctx.ino2 = 0;
            } else
                subdir->parent = ino;
        }

        ext2fs_icount_increment(ctx->inode_count, dirent->inode,
                                &links);
        if (links > 1)
            ctx->fs_links_count++;
        ctx->fs_total_count++;
next:
        offset += dirent->rec_len;
    } while (offset < fs->blocksize);
#if 0
    printf("\n");
#endif
    if (offset != fs->blocksize) {
        cd->pctx.num = dirent->rec_len - fs->blocksize + offset;
        if (fix_problem(ctx, PR_2_FINAL_RECLEN, &cd->pctx)) {
            dirent->rec_len = cd->pctx.num;
            dir_modified++;
        }
    }
    if (dir_modified) {
        cd->pctx.errcode = ext2fs_write_dir_block(fs, block_nr, buf);
        if (cd->pctx.errcode) {
            if (!fix_problem(ctx, PR_2_WRITE_DIRBLOCK,
                             &cd->pctx)) {
                ctx->flags |= E2F_FLAG_ABORT;
                return DIRENT_ABORT;
            }
        }
        ext2fs_mark_changed(fs);
    }
    return 0;
}