mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 02:30:34 +02:00
cf91a99daa
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
74 lines
2 KiB
C
74 lines
2 KiB
C
#ifndef _NET_DST_OPS_H
|
|
#define _NET_DST_OPS_H
|
|
#include <linux/types.h>
|
|
#include <linux/percpu_counter.h>
|
|
#include <linux/cache.h>
|
|
|
|
struct dst_entry;
|
|
struct kmem_cachep;
|
|
struct net_device;
|
|
struct sk_buff;
|
|
struct sock;
|
|
struct net;
|
|
|
|
struct dst_ops {
|
|
unsigned short family;
|
|
unsigned int gc_thresh;
|
|
|
|
int (*gc)(struct dst_ops *ops);
|
|
struct dst_entry * (*check)(struct dst_entry *, __u32 cookie);
|
|
unsigned int (*default_advmss)(const struct dst_entry *);
|
|
unsigned int (*mtu)(const struct dst_entry *);
|
|
u32 * (*cow_metrics)(struct dst_entry *, unsigned long);
|
|
void (*destroy)(struct dst_entry *);
|
|
void (*ifdown)(struct dst_entry *,
|
|
struct net_device *dev, int how);
|
|
struct dst_entry * (*negative_advice)(struct dst_entry *);
|
|
void (*link_failure)(struct sk_buff *);
|
|
void (*update_pmtu)(struct dst_entry *dst, struct sock *sk,
|
|
struct sk_buff *skb, u32 mtu);
|
|
void (*redirect)(struct dst_entry *dst, struct sock *sk,
|
|
struct sk_buff *skb);
|
|
int (*local_out)(struct net *net, struct sock *sk, struct sk_buff *skb);
|
|
struct neighbour * (*neigh_lookup)(const struct dst_entry *dst,
|
|
struct sk_buff *skb,
|
|
const void *daddr);
|
|
|
|
struct kmem_cache *kmem_cachep;
|
|
|
|
struct percpu_counter pcpuc_entries ____cacheline_aligned_in_smp;
|
|
};
|
|
|
|
static inline int dst_entries_get_fast(struct dst_ops *dst)
|
|
{
|
|
return percpu_counter_read_positive(&dst->pcpuc_entries);
|
|
}
|
|
|
|
static inline int dst_entries_get_slow(struct dst_ops *dst)
|
|
{
|
|
int res;
|
|
|
|
local_bh_disable();
|
|
res = percpu_counter_sum_positive(&dst->pcpuc_entries);
|
|
local_bh_enable();
|
|
return res;
|
|
}
|
|
|
|
static inline void dst_entries_add(struct dst_ops *dst, int val)
|
|
{
|
|
local_bh_disable();
|
|
percpu_counter_add(&dst->pcpuc_entries, val);
|
|
local_bh_enable();
|
|
}
|
|
|
|
static inline int dst_entries_init(struct dst_ops *dst)
|
|
{
|
|
return percpu_counter_init(&dst->pcpuc_entries, 0, GFP_KERNEL);
|
|
}
|
|
|
|
static inline void dst_entries_destroy(struct dst_ops *dst)
|
|
{
|
|
percpu_counter_destroy(&dst->pcpuc_entries);
|
|
}
|
|
|
|
#endif
|