* Authors:
* Pedro Roque <roque@di.fc.ul.pt>
* Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
+ *
+ * Changes:
+ *
+ * Harald Welte: <laforge@gnumonks.org>
+ * - Add neighbour cache statistics like rtstat
*/
/* The following flags & states are exported to user space,
#include <asm/atomic.h>
#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/rcupdate.h>
+#include <linux/seq_file.h>
#include <linux/err.h>
#include <linux/sysctl.h>
-#define NUD_IN_TIMER (NUD_INCOMPLETE|NUD_DELAY|NUD_PROBE)
+#define NUD_IN_TIMER (NUD_INCOMPLETE|NUD_REACHABLE|NUD_DELAY|NUD_PROBE)
#define NUD_VALID (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE|NUD_PROBE|NUD_STALE|NUD_DELAY)
#define NUD_CONNECTED (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE)
+struct neighbour;
+
struct neigh_parms
{
struct neigh_parms *next;
void *sysctl_table;
+ int dead;
+ atomic_t refcnt;
+ struct rcu_head rcu_head;
+
int base_reachable_time;
int retrans_time;
int gc_staletime;
struct neigh_statistics
{
- unsigned long allocs;
- unsigned long res_failed;
- unsigned long rcv_probes_mcast;
- unsigned long rcv_probes_ucast;
+ unsigned long allocs; /* number of allocated neighs */
+ unsigned long destroys; /* number of destroyed neighs */
+ unsigned long hash_grows; /* number of hash resizes */
+
+ unsigned long res_failed; /* nomber of failed resolutions */
+
+ unsigned long lookups; /* number of lookups */
+ unsigned long hits; /* number of hits (among lookups) */
+
+ unsigned long rcv_probes_mcast; /* number of received mcast ipv6 */
+ unsigned long rcv_probes_ucast; /* number of received ucast ipv6 */
+
+ unsigned long periodic_gc_runs; /* number of periodic GC runs */
+ unsigned long forced_gc_runs; /* number of forced GC runs */
};
+#define NEIGH_CACHE_STAT_INC(tbl, field) \
+ (per_cpu_ptr((tbl)->stats, smp_processor_id())->field++)
+
struct neighbour
{
struct neighbour *next;
u8 key[0];
};
-#define NEIGH_HASHMASK 0x1F
-#define PNEIGH_HASHMASK 0xF
-
/*
* neighbour table manipulation
*/
unsigned long last_rand;
struct neigh_parms *parms_list;
kmem_cache_t *kmem_cachep;
- struct neigh_statistics stats;
- struct neighbour *hash_buckets[NEIGH_HASHMASK+1];
- struct pneigh_entry *phash_buckets[PNEIGH_HASHMASK+1];
+ struct neigh_statistics *stats;
+ struct neighbour **hash_buckets;
+ unsigned int hash_mask;
+ __u32 hash_rnd;
+ unsigned int hash_chain_gc;
+ struct pneigh_entry **phash_buckets;
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *pde;
+#endif
};
+/* flags for neigh_update() */
+#define NEIGH_UPDATE_F_OVERRIDE 0x00000001
+#define NEIGH_UPDATE_F_WEAK_OVERRIDE 0x00000002
+#define NEIGH_UPDATE_F_OVERRIDE_ISROUTER 0x00000004
+#define NEIGH_UPDATE_F_ISROUTER 0x40000000
+#define NEIGH_UPDATE_F_ADMIN 0x80000000
+
extern void neigh_table_init(struct neigh_table *tbl);
extern int neigh_table_clear(struct neigh_table *tbl);
extern struct neighbour * neigh_lookup(struct neigh_table *tbl,
const void *pkey,
struct net_device *dev);
+extern struct neighbour * neigh_lookup_nodev(struct neigh_table *tbl,
+ const void *pkey);
extern struct neighbour * neigh_create(struct neigh_table *tbl,
const void *pkey,
struct net_device *dev);
extern void neigh_destroy(struct neighbour *neigh);
extern int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb);
-extern int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new, int override, int arp);
+extern int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
+ u32 flags);
extern void neigh_changeaddr(struct neigh_table *tbl, struct net_device *dev);
extern int neigh_ifdown(struct neigh_table *tbl, struct net_device *dev);
extern int neigh_resolve_output(struct sk_buff *skb);
extern struct neigh_parms *neigh_parms_alloc(struct net_device *dev, struct neigh_table *tbl);
extern void neigh_parms_release(struct neigh_table *tbl, struct neigh_parms *parms);
+extern void neigh_parms_destroy(struct neigh_parms *parms);
extern unsigned long neigh_rand_reach_time(unsigned long base);
extern void pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p,
extern int neigh_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
extern void neigh_app_ns(struct neighbour *n);
+extern void neigh_for_each(struct neigh_table *tbl, void (*cb)(struct neighbour *, void *), void *cookie);
+extern void __neigh_for_each_release(struct neigh_table *tbl, int (*cb)(struct neighbour *));
+extern void pneigh_for_each(struct neigh_table *tbl, void (*cb)(struct pneigh_entry *));
+
+struct neigh_seq_state {
+ struct neigh_table *tbl;
+ void *(*neigh_sub_iter)(struct neigh_seq_state *state,
+ struct neighbour *n, loff_t *pos);
+ unsigned int bucket;
+ unsigned int flags;
+#define NEIGH_SEQ_NEIGH_ONLY 0x00000001
+#define NEIGH_SEQ_IS_PNEIGH 0x00000002
+#define NEIGH_SEQ_SKIP_NOARP 0x00000004
+};
+extern void *neigh_seq_start(struct seq_file *, loff_t *, struct neigh_table *, unsigned int);
+extern void *neigh_seq_next(struct seq_file *, void *, loff_t *);
+extern void neigh_seq_stop(struct seq_file *, void *);
+
extern int neigh_sysctl_register(struct net_device *dev,
struct neigh_parms *p,
int p_id, int pdev_id,
proc_handler *proc_handler);
extern void neigh_sysctl_unregister(struct neigh_parms *p);
+static inline void __neigh_parms_put(struct neigh_parms *parms)
+{
+ atomic_dec(&parms->refcnt);
+}
+
+static inline void neigh_parms_put(struct neigh_parms *parms)
+{
+ if (atomic_dec_and_test(&parms->refcnt))
+ neigh_parms_destroy(parms);
+}
+
+static inline struct neigh_parms *neigh_parms_clone(struct neigh_parms *parms)
+{
+ atomic_inc(&parms->refcnt);
+ return parms;
+}
+
/*
* Neighbour references
*/
git://git.onelab.eu / linux-2.6.git / blobdiff