projects / linux.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; | |
| d8f1641b | 11 | struct sock; |
| 86393e52 AD |
12 | |
| 13 | struct dst_ops { | |
| 14 | unsigned short family; | |
| 95c96174 | 15 | unsigned int gc_thresh; |
| 86393e52 AD |
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 *); |
| ebb762f2 | 20 | unsigned int (*mtu)(const struct dst_entry *); |
| 62fa8a84 | 21 | u32 * (*cow_metrics)(struct dst_entry *, unsigned long); |
| 86393e52 AD |
22 | void (*destroy)(struct dst_entry *); |
| 23 | void (*ifdown)(struct dst_entry *, | |
| 24 | struct net_device *dev, int how); | |
| 25 | struct dst_entry * (*negative_advice)(struct dst_entry *); | |
| 26 | void (*link_failure)(struct sk_buff *); | |
| 6700c270 DM |
27 | void (*update_pmtu)(struct dst_entry *dst, struct sock *sk, |
| 28 | struct sk_buff *skb, u32 mtu); | |
| 29 | void (*redirect)(struct dst_entry *dst, struct sock *sk, | |
| 30 | struct sk_buff *skb); | |
| 86393e52 | 31 | int (*local_out)(struct sk_buff *skb); |
| f894cbf8 DM |
32 | struct neighbour * (*neigh_lookup)(const struct dst_entry *dst, |
| 33 | struct sk_buff *skb, | |
| 34 | const void *daddr); | |
| 86393e52 | 35 | |
| 86393e52 | 36 | struct kmem_cache *kmem_cachep; |
| fc66f95c ED |
37 | |
| 38 | struct percpu_counter pcpuc_entries ____cacheline_aligned_in_smp; | |
| 86393e52 | 39 | }; |
| fc66f95c ED |
40 | |
| 41 | static inline int dst_entries_get_fast(struct dst_ops *dst) | |
| 42 | { | |
| 43 | return percpu_counter_read_positive(&dst->pcpuc_entries); | |
| 44 | } | |
| 45 | ||
| 46 | static inline int dst_entries_get_slow(struct dst_ops *dst) | |
| 47 | { | |
| 48 | int res; | |
| 49 | ||
| 50 | local_bh_disable(); | |
| 51 | res = percpu_counter_sum_positive(&dst->pcpuc_entries); | |
| 52 | local_bh_enable(); | |
| 53 | return res; | |
| 54 | } | |
| 55 | ||
| 56 | static inline void dst_entries_add(struct dst_ops *dst, int val) | |
| 57 | { | |
| 58 | local_bh_disable(); | |
| 59 | percpu_counter_add(&dst->pcpuc_entries, val); | |
| 60 | local_bh_enable(); | |
| 61 | } | |
| 62 | ||
| 63 | static inline int dst_entries_init(struct dst_ops *dst) | |
| 64 | { | |
| 908c7f19 | 65 | return percpu_counter_init(&dst->pcpuc_entries, 0, GFP_KERNEL); |
| fc66f95c ED |
66 | } |
| 67 | ||
| 68 | static inline void dst_entries_destroy(struct dst_ops *dst) | |
| 69 | { | |
| 70 | percpu_counter_destroy(&dst->pcpuc_entries); | |
| 71 | } | |
| 72 | ||
| 86393e52 | 73 | #endif |