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2
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4
5
6#ifndef FLOW_TABLE_H
7#define FLOW_TABLE_H 1
8
9#include <linux/kernel.h>
10#include <linux/netlink.h>
11#include <linux/openvswitch.h>
12#include <linux/spinlock.h>
13#include <linux/types.h>
14#include <linux/rcupdate.h>
15#include <linux/if_ether.h>
16#include <linux/in6.h>
17#include <linux/jiffies.h>
18#include <linux/time.h>
19
20#include <net/inet_ecn.h>
21#include <net/ip_tunnels.h>
22
23#include "flow.h"
24
25struct mask_cache_entry {
26 u32 skb_hash;
27 u32 mask_index;
28};
29
30struct mask_cache {
31 struct rcu_head rcu;
32 u32 cache_size;
33 struct mask_cache_entry __percpu *mask_cache;
34};
35
36struct mask_count {
37 int index;
38 u64 counter;
39};
40
41struct mask_array_stats {
42 struct u64_stats_sync syncp;
43 u64 usage_cntrs[];
44};
45
46struct mask_array {
47 struct rcu_head rcu;
48 int count, max;
49 struct mask_array_stats __percpu *masks_usage_stats;
50 u64 *masks_usage_zero_cntr;
51 struct sw_flow_mask __rcu *masks[];
52};
53
54struct table_instance {
55 struct hlist_head *buckets;
56 unsigned int n_buckets;
57 struct rcu_head rcu;
58 int node_ver;
59 u32 hash_seed;
60};
61
62struct flow_table {
63 struct table_instance __rcu *ti;
64 struct table_instance __rcu *ufid_ti;
65 struct mask_cache __rcu *mask_cache;
66 struct mask_array __rcu *mask_array;
67 unsigned long last_rehash;
68 unsigned int count;
69 unsigned int ufid_count;
70};
71
72extern struct kmem_cache *flow_stats_cache;
73
74int ovs_flow_init(void);
75void ovs_flow_exit(void);
76
77struct sw_flow *ovs_flow_alloc(void);
78void ovs_flow_free(struct sw_flow *, bool deferred);
79
80int ovs_flow_tbl_init(struct flow_table *);
81int ovs_flow_tbl_count(const struct flow_table *table);
82void ovs_flow_tbl_destroy(struct flow_table *table);
83int ovs_flow_tbl_flush(struct flow_table *flow_table);
84
85int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow,
86 const struct sw_flow_mask *mask);
87void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow);
88int ovs_flow_tbl_num_masks(const struct flow_table *table);
89u32 ovs_flow_tbl_masks_cache_size(const struct flow_table *table);
90int ovs_flow_tbl_masks_cache_resize(struct flow_table *table, u32 size);
91struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *table,
92 u32 *bucket, u32 *idx);
93struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *,
94 const struct sw_flow_key *,
95 u32 skb_hash,
96 u32 *n_mask_hit,
97 u32 *n_cache_hit);
98struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *,
99 const struct sw_flow_key *);
100struct sw_flow *ovs_flow_tbl_lookup_exact(struct flow_table *tbl,
101 const struct sw_flow_match *match);
102struct sw_flow *ovs_flow_tbl_lookup_ufid(struct flow_table *,
103 const struct sw_flow_id *);
104
105bool ovs_flow_cmp(const struct sw_flow *, const struct sw_flow_match *);
106
107void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src,
108 bool full, const struct sw_flow_mask *mask);
109
110void ovs_flow_masks_rebalance(struct flow_table *table);
111void table_instance_flow_flush(struct flow_table *table,
112 struct table_instance *ti,
113 struct table_instance *ufid_ti);
114
115#endif
116
