1 files changed, 106 insertions, 0 deletions
diff --git a/src/defrag-hash.h b/src/defrag-hash.h
new file mode 100644
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--- /dev/null
+++ b/src/defrag-hash.h
@@ -0,0 +1,106 @@
+/* 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__ */
+