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/*
* Copyright (c) 2022 Cisco and/or its affiliates.
* Licensed 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 SRC_PLUGINS_HTTP_STATIC_HTTP_CACHE_H_
#define SRC_PLUGINS_HTTP_STATIC_HTTP_CACHE_H_
#include <vppinfra/bihash_vec8_8.h>
typedef struct hss_cache_entry_
{
/** Name of the file */
u8 *filename;
/** Last modified date, format:
* <day-name>, <day> <month> <year> <hour>:<minute>:<second> GMT */
u8 *last_modified;
/** Contents of the file, as a u8 * vector */
u8 *data;
/** Last time the cache entry was used */
f64 last_used;
/** Cache LRU links */
u32 next_index;
u32 prev_index;
/** Reference count, so we don't recycle while referenced */
int inuse;
} hss_cache_entry_t;
typedef struct hss_cache_
{
/** Unified file data cache pool */
hss_cache_entry_t *cache_pool;
/** Hash table which maps file name to file data */
BVT (clib_bihash) name_to_data;
/** Session pool lock */
clib_spinlock_t cache_lock;
/** Current cache size */
u64 cache_size;
/** Max cache size in bytes */
u64 cache_limit;
/** Number of cache evictions */
u64 cache_evictions;
/** Cache LRU listheads */
u32 first_index;
u32 last_index;
u8 debug_level;
} hss_cache_t;
u32 hss_cache_lookup_and_attach (hss_cache_t *hc, u8 *path, u8 **data,
u64 *data_len, u8 **last_modified);
u32 hss_cache_add_and_attach (hss_cache_t *hc, u8 *path, u8 **data,
u64 *data_len, u8 **last_modified);
void hss_cache_detach_entry (hss_cache_t *hc, u32 ce_index);
u32 hss_cache_clear (hss_cache_t *hc);
void hss_cache_init (hss_cache_t *hc, uword cache_size, u8 debug_level);
u8 *format_hss_cache (u8 *s, va_list *args);
#endif /* SRC_PLUGINS_HTTP_STATIC_HTTP_CACHE_H_ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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