projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 86393e52 AD |
1 | #ifndef _NET_DST_OPS_H |
| 2 | #define _NET_DST_OPS_H | |
| 3 | #include <linux/types.h> | |
| fc66f95c | 4 | #include <linux/percpu_counter.h> |
| 43b81f85 | 5 | #include <linux/cache.h> |
| 86393e52 AD |
6 | |
| 7 | struct dst_entry; | |
| 8 | struct kmem_cachep; | |
| 9 | struct net_device; | |
| 10 | struct sk_buff; | |
| 11 | ||
| 12 | struct dst_ops { | |
| 13 | unsigned short family; | |
| 14 | __be16 protocol; | |
| 15 | unsigned gc_thresh; | |
| 16 | ||
| 17 | int (*gc)(struct dst_ops *ops); | |
| 18 | struct dst_entry * (*check)(struct dst_entry *, __u32 cookie); | |
| 0dbaee3b | 19 | unsigned int (*default_advmss)(const struct dst_entry *); |
| 86393e52 AD |
20 | void (*destroy)(struct dst_entry *); |
| 21 | void (*ifdown)(struct dst_entry *, | |
| 22 | struct net_device *dev, int how); | |
| 23 | struct dst_entry * (*negative_advice)(struct dst_entry *); | |
| 24 | void (*link_failure)(struct sk_buff *); | |
| 25 | void (*update_pmtu)(struct dst_entry *dst, u32 mtu); | |
| 26 | int (*local_out)(struct sk_buff *skb); | |
| 27 | ||
| 86393e52 | 28 | struct kmem_cache *kmem_cachep; |
| fc66f95c ED |
29 | |
| 30 | struct percpu_counter pcpuc_entries ____cacheline_aligned_in_smp; | |
| 86393e52 | 31 | }; |
| fc66f95c ED |
32 | |
| 33 | static inline int dst_entries_get_fast(struct dst_ops *dst) | |
| 34 | { | |
| 35 | return percpu_counter_read_positive(&dst->pcpuc_entries); | |
| 36 | } | |
| 37 | ||
| 38 | static inline int dst_entries_get_slow(struct dst_ops *dst) | |
| 39 | { | |
| 40 | int res; | |
| 41 | ||
| 42 | local_bh_disable(); | |
| 43 | res = percpu_counter_sum_positive(&dst->pcpuc_entries); | |
| 44 | local_bh_enable(); | |
| 45 | return res; | |
| 46 | } | |
| 47 | ||
| 48 | static inline void dst_entries_add(struct dst_ops *dst, int val) | |
| 49 | { | |
| 50 | local_bh_disable(); | |
| 51 | percpu_counter_add(&dst->pcpuc_entries, val); | |
| 52 | local_bh_enable(); | |
| 53 | } | |
| 54 | ||
| 55 | static inline int dst_entries_init(struct dst_ops *dst) | |
| 56 | { | |
| 57 | return percpu_counter_init(&dst->pcpuc_entries, 0); | |
| 58 | } | |
| 59 | ||
| 60 | static inline void dst_entries_destroy(struct dst_ops *dst) | |
| 61 | { | |
| 62 | percpu_counter_destroy(&dst->pcpuc_entries); | |
| 63 | } | |
| 64 | ||
| 86393e52 | 65 | #endif |