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73 lines
2.1 KiB
73 lines
2.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _NET_DST_OPS_H |
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#define _NET_DST_OPS_H |
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#include <linux/types.h> |
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#include <linux/percpu_counter.h> |
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#include <linux/cache.h> |
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struct dst_entry; |
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struct kmem_cachep; |
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struct net_device; |
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struct sk_buff; |
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struct sock; |
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struct net; |
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struct dst_ops { |
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unsigned short family; |
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unsigned int gc_thresh; |
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int (*gc)(struct dst_ops *ops); |
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struct dst_entry * (*check)(struct dst_entry *, __u32 cookie); |
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unsigned int (*default_advmss)(const struct dst_entry *); |
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unsigned int (*mtu)(const struct dst_entry *); |
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u32 * (*cow_metrics)(struct dst_entry *, unsigned long); |
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void (*destroy)(struct dst_entry *); |
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void (*ifdown)(struct dst_entry *, |
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struct net_device *dev, int how); |
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struct dst_entry * (*negative_advice)(struct dst_entry *); |
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void (*link_failure)(struct sk_buff *); |
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void (*update_pmtu)(struct dst_entry *dst, struct sock *sk, |
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struct sk_buff *skb, u32 mtu, |
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bool confirm_neigh); |
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void (*redirect)(struct dst_entry *dst, struct sock *sk, |
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struct sk_buff *skb); |
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int (*local_out)(struct net *net, struct sock *sk, struct sk_buff *skb); |
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struct neighbour * (*neigh_lookup)(const struct dst_entry *dst, |
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struct sk_buff *skb, |
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const void *daddr); |
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void (*confirm_neigh)(const struct dst_entry *dst, |
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const void *daddr); |
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struct kmem_cache *kmem_cachep; |
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struct percpu_counter pcpuc_entries ____cacheline_aligned_in_smp; |
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}; |
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static inline int dst_entries_get_fast(struct dst_ops *dst) |
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{ |
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return percpu_counter_read_positive(&dst->pcpuc_entries); |
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} |
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static inline int dst_entries_get_slow(struct dst_ops *dst) |
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{ |
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return percpu_counter_sum_positive(&dst->pcpuc_entries); |
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} |
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#define DST_PERCPU_COUNTER_BATCH 32 |
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static inline void dst_entries_add(struct dst_ops *dst, int val) |
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{ |
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percpu_counter_add_batch(&dst->pcpuc_entries, val, |
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DST_PERCPU_COUNTER_BATCH); |
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} |
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static inline int dst_entries_init(struct dst_ops *dst) |
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{ |
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return percpu_counter_init(&dst->pcpuc_entries, 0, GFP_KERNEL); |
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} |
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static inline void dst_entries_destroy(struct dst_ops *dst) |
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{ |
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percpu_counter_destroy(&dst->pcpuc_entries); |
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} |
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#endif
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