1 /* SPDX-License-Identifier: GPL-2.0 */
4 #include <linux/types.h>
5 #include <linux/percpu_counter.h>
6 #include <linux/cache.h>
16 unsigned short family
;
17 unsigned int gc_thresh
;
19 int (*gc
)(struct dst_ops
*ops
);
20 struct dst_entry
* (*check
)(struct dst_entry
*, __u32 cookie
);
21 unsigned int (*default_advmss
)(const struct dst_entry
*);
22 unsigned int (*mtu
)(const struct dst_entry
*);
23 u32
* (*cow_metrics
)(struct dst_entry
*, unsigned long);
24 void (*destroy
)(struct dst_entry
*);
25 void (*ifdown
)(struct dst_entry
*,
26 struct net_device
*dev
, int how
);
27 struct dst_entry
* (*negative_advice
)(struct dst_entry
*);
28 void (*link_failure
)(struct sk_buff
*);
29 void (*update_pmtu
)(struct dst_entry
*dst
, struct sock
*sk
,
30 struct sk_buff
*skb
, u32 mtu
);
31 void (*redirect
)(struct dst_entry
*dst
, struct sock
*sk
,
33 int (*local_out
)(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
34 struct neighbour
* (*neigh_lookup
)(const struct dst_entry
*dst
,
37 void (*confirm_neigh
)(const struct dst_entry
*dst
,
40 struct kmem_cache
*kmem_cachep
;
42 struct percpu_counter pcpuc_entries ____cacheline_aligned_in_smp
;
45 static inline int dst_entries_get_fast(struct dst_ops
*dst
)
47 return percpu_counter_read_positive(&dst
->pcpuc_entries
);
50 static inline int dst_entries_get_slow(struct dst_ops
*dst
)
52 return percpu_counter_sum_positive(&dst
->pcpuc_entries
);
55 static inline void dst_entries_add(struct dst_ops
*dst
, int val
)
57 percpu_counter_add(&dst
->pcpuc_entries
, val
);
60 static inline int dst_entries_init(struct dst_ops
*dst
)
62 return percpu_counter_init(&dst
->pcpuc_entries
, 0, GFP_KERNEL
);
65 static inline void dst_entries_destroy(struct dst_ops
*dst
)
67 percpu_counter_destroy(&dst
->pcpuc_entries
);