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diff --git a/modules/cache/mod_cache_disk.h b/modules/cache/mod_cache_disk.h
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+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MOD_CACHE_DISK_H
+#define MOD_CACHE_DISK_H
+
+#include "apr_file_io.h"
+
+#include "cache_disk_common.h"
+
+/*
+ * include for mod_cache_disk: Disk Based HTTP 1.1 Cache.
+ */
+
+typedef struct {
+ apr_pool_t *pool;
+ const char *file;
+ apr_file_t *fd;
+ char *tempfile;
+ apr_file_t *tempfd;
+} disk_cache_file_t;
+
+/*
+ * disk_cache_object_t
+ * Pointed to by cache_object_t::vobj
+ */
+typedef struct disk_cache_object {
+ const char *root; /* the location of the cache directory */
+ apr_size_t root_len;
+ const char *prefix;
+ disk_cache_file_t data; /* data file structure */
+ disk_cache_file_t hdrs; /* headers file structure */
+ disk_cache_file_t vary; /* vary file structure */
+ const char *hashfile; /* Computed hash key for this URI */
+ const char *name; /* Requested URI without vary bits - suitable for mortals. */
+ const char *key; /* On-disk prefix; URI with Vary bits (if present) */
+ apr_off_t file_size; /* File size of the cached data file */
+ disk_cache_info_t disk_info; /* Header information. */
+ apr_table_t *headers_in; /* Input headers to save */
+ apr_table_t *headers_out; /* Output headers to save */
+ apr_off_t offset; /* Max size to set aside */
+ apr_time_t timeout; /* Max time to set aside */
+ unsigned int done:1; /* Is the attempt to cache complete? */
+} disk_cache_object_t;
+
+
+/*
+ * mod_cache_disk configuration
+ */
+/* TODO: Make defaults OS specific */
+#define CACHEFILE_LEN 20 /* must be less than HASH_LEN/2 */
+#define DEFAULT_DIRLEVELS 2
+#define DEFAULT_DIRLENGTH 2
+#define DEFAULT_MIN_FILE_SIZE 1
+#define DEFAULT_MAX_FILE_SIZE 1000000
+#define DEFAULT_READSIZE 0
+#define DEFAULT_READTIME 0
+
+typedef struct {
+ const char* cache_root;
+ apr_size_t cache_root_len;
+ int dirlevels; /* Number of levels of subdirectories */
+ int dirlength; /* Length of subdirectory names */
+} disk_cache_conf;
+
+typedef struct {
+ apr_off_t minfs; /* minimum file size for cached files */
+ apr_off_t maxfs; /* maximum file size for cached files */
+ apr_off_t readsize; /* maximum data to attempt to cache in one go */
+ apr_time_t readtime; /* maximum time taken to cache in one go */
+ unsigned int minfs_set:1;
+ unsigned int maxfs_set:1;
+ unsigned int readsize_set:1;
+ unsigned int readtime_set:1;
+} disk_cache_dir_conf;
+
+#endif /*MOD_CACHE_DISK_H*/
+