/*
- * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#define MAC_LEARNING_H 1
#include <time.h>
+#include "hmap.h"
#include "list.h"
#include "packets.h"
#include "tag.h"
#include "timeval.h"
-#define MAC_HASH_BITS 10
-#define MAC_HASH_MASK (MAC_HASH_SIZE - 1)
-#define MAC_HASH_SIZE (1u << MAC_HASH_BITS)
+struct mac_learning;
-#define MAC_MAX 2048
+/* Default maximum size of a MAC learning table, in entries. */
+#define MAC_DEFAULT_MAX 2048
/* Time, in seconds, before expiring a mac_entry due to inactivity. */
-#define MAC_ENTRY_IDLE_TIME 60
+#define MAC_ENTRY_DEFAULT_IDLE_TIME 300
/* Time, in seconds, to lock an entry updated by a gratuitous ARP to avoid
* relearning based on a reflection from a bond slave. */
/* A MAC learning table entry. */
struct mac_entry {
- struct list hash_node; /* Element in a mac_learning 'table' list. */
- struct list lru_node; /* Element in 'lrus' or 'free' list. */
+ struct hmap_node hmap_node; /* Node in a mac_learning hmap. */
+ struct list lru_node; /* Element in 'lrus' list. */
time_t expires; /* Expiration time. */
time_t grat_arp_lock; /* Gratuitous ARP lock expiration time. */
uint8_t mac[ETH_ADDR_LEN]; /* Known MAC address. */
} port;
};
-int mac_entry_age(const struct mac_entry *);
+int mac_entry_age(const struct mac_learning *, const struct mac_entry *);
/* Returns true if mac_learning_insert() just created 'mac' and the caller has
* not yet properly initialized it. */
/* MAC learning table. */
struct mac_learning {
- struct list free; /* Not-in-use entries. */
+ struct hmap table; /* Learning table. */
struct list lrus; /* In-use entries, least recently used at the
front, most recently used at the back. */
- struct list table[MAC_HASH_SIZE]; /* Hash table. */
- struct mac_entry entries[MAC_MAX]; /* All entries. */
uint32_t secret; /* Secret for randomizing hash table. */
unsigned long *flood_vlans; /* Bitmap of learning disabled VLANs. */
+ unsigned int idle_time; /* Max age before deleting an entry. */
+ size_t max_entries; /* Max number of learned MACs. */
};
/* Basics. */
-struct mac_learning *mac_learning_create(void);
+struct mac_learning *mac_learning_create(unsigned int idle_time);
void mac_learning_destroy(struct mac_learning *);
void mac_learning_run(struct mac_learning *, struct tag_set *);
/* Configuration. */
bool mac_learning_set_flood_vlans(struct mac_learning *,
const unsigned long *bitmap);
+void mac_learning_set_idle_time(struct mac_learning *, unsigned int idle_time);
+void mac_learning_set_max_entries(struct mac_learning *, size_t max_entries);
/* Learning. */
bool mac_learning_may_learn(const struct mac_learning *,
/* Flushing. */
void mac_learning_expire(struct mac_learning *, struct mac_entry *);
-void mac_learning_flush(struct mac_learning *);
+void mac_learning_flush(struct mac_learning *, struct tag_set *);
#endif /* mac-learning.h */