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/* Copyright (C) 2007-2023 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Victor Julien <victor@inliniac.net>
*/
#ifndef __DEFRAG_HASH_H__
#define __DEFRAG_HASH_H__
#include "decode.h"
#include "defrag.h"
#include "util-exception-policy.h"
/** Spinlocks or Mutex for the flow buckets. */
//#define DRLOCK_SPIN
#define DRLOCK_MUTEX
#ifdef DRLOCK_SPIN
#ifdef DRLOCK_MUTEX
#error Cannot enable both DRLOCK_SPIN and DRLOCK_MUTEX
#endif
#endif
#ifdef DRLOCK_SPIN
#define DRLOCK_TYPE SCSpinlock
#define DRLOCK_INIT(fb) SCSpinInit(&(fb)->lock, 0)
#define DRLOCK_DESTROY(fb) SCSpinDestroy(&(fb)->lock)
#define DRLOCK_LOCK(fb) SCSpinLock(&(fb)->lock)
#define DRLOCK_TRYLOCK(fb) SCSpinTrylock(&(fb)->lock)
#define DRLOCK_UNLOCK(fb) SCSpinUnlock(&(fb)->lock)
#elif defined DRLOCK_MUTEX
#define DRLOCK_TYPE SCMutex
#define DRLOCK_INIT(fb) SCMutexInit(&(fb)->lock, NULL)
#define DRLOCK_DESTROY(fb) SCMutexDestroy(&(fb)->lock)
#define DRLOCK_LOCK(fb) SCMutexLock(&(fb)->lock)
#define DRLOCK_TRYLOCK(fb) SCMutexTrylock(&(fb)->lock)
#define DRLOCK_UNLOCK(fb) SCMutexUnlock(&(fb)->lock)
#else
#error Enable DRLOCK_SPIN or DRLOCK_MUTEX
#endif
typedef struct DefragTrackerHashRow_ {
DRLOCK_TYPE lock;
DefragTracker *head;
DefragTracker *tail;
} DefragTrackerHashRow;
/** defrag tracker hash table */
extern DefragTrackerHashRow *defragtracker_hash;
typedef struct DefragConfig_ {
SC_ATOMIC_DECLARE(uint64_t, memcap);
uint32_t hash_rand;
uint32_t hash_size;
uint32_t prealloc;
enum ExceptionPolicy memcap_policy;
} DefragConfig;
/** \brief check if a memory alloc would fit in the memcap
*
* \param size memory allocation size to check
*
* \retval 1 it fits
* \retval 0 no fit
*/
#define DEFRAG_CHECK_MEMCAP(size) \
((((uint64_t)SC_ATOMIC_GET(defrag_memuse) + (uint64_t)(size)) <= SC_ATOMIC_GET(defrag_config.memcap)))
extern DefragConfig defrag_config;
SC_ATOMIC_EXTERN(uint64_t,defrag_memuse);
SC_ATOMIC_EXTERN(unsigned int,defragtracker_counter);
SC_ATOMIC_EXTERN(unsigned int,defragtracker_prune_idx);
void DefragInitConfig(bool quiet);
void DefragHashShutdown(void);
DefragTracker *DefragLookupTrackerFromHash (Packet *);
DefragTracker *DefragGetTrackerFromHash (Packet *);
void DefragTrackerRelease(DefragTracker *);
void DefragTrackerClearMemory(DefragTracker *);
void DefragTrackerMoveToSpare(DefragTracker *);
uint32_t DefragTrackerSpareQueueGetSize(void);
int DefragTrackerSetMemcap(uint64_t);
uint64_t DefragTrackerGetMemcap(void);
uint64_t DefragTrackerGetMemuse(void);
#endif /* __DEFRAG_HASH_H__ */
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