linux - net/openvswitch/flow

115 lines · 3.1 KiB

1	/* SPDX-License-Identifier: GPL-2.0-only */
2	/*
3	* Copyright (c) 2007-2013 Nicira, Inc.
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
25	struct mask_cache_entry {
26	u32 skb_hash;
27	u32 mask_index;
28	};
29
30	struct mask_cache {
31	struct rcu_head rcu;
32	u32 cache_size; /* Must be ^2 value. */
33	struct mask_cache_entry __percpu *mask_cache;
34	};
35
36	struct mask_count {
37	int index;
38	u64 counter;
39	};
40
41	struct mask_array_stats {
42	struct u64_stats_sync syncp;
43	u64 usage_cntrs[];
44	};
45
46	struct 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[] __counted_by(max);
52	};
53
54	struct 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
62	struct 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
72	extern struct kmem_cache *flow_stats_cache;
73
74	int ovs_flow_init(void);
75	void ovs_flow_exit(void);
76
77	struct sw_flow *ovs_flow_alloc(void);
78	void ovs_flow_free(struct sw_flow *, bool deferred);
79
80	int ovs_flow_tbl_init(struct flow_table *);
81	int ovs_flow_tbl_count(const struct flow_table *table);
82	void ovs_flow_tbl_destroy(struct flow_table *table);
83	int ovs_flow_tbl_flush(struct flow_table *flow_table);
84
85	int ovs_flow_tbl_insert(struct flow_table table, struct sw_flow flow,
86	const struct sw_flow_mask *mask);
87	void ovs_flow_tbl_remove(struct flow_table table, struct sw_flow flow);
88	int ovs_flow_tbl_num_masks(const struct flow_table *table);
89	u32 ovs_flow_tbl_masks_cache_size(const struct flow_table *table);
90	int ovs_flow_tbl_masks_cache_resize(struct flow_table *table, u32 size);
91	struct sw_flow ovs_flow_tbl_dump_next(struct table_instance table,
92	u32 bucket, u32 idx);
93	struct 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);
98	struct sw_flow ovs_flow_tbl_lookup(struct flow_table ,
99	const struct sw_flow_key *);
100	struct sw_flow ovs_flow_tbl_lookup_exact(struct flow_table tbl,
101	const struct sw_flow_match *match);
102	struct sw_flow ovs_flow_tbl_lookup_ufid(struct flow_table ,
103	const struct sw_flow_id *);
104
105	bool ovs_flow_cmp(const struct sw_flow , const struct sw_flow_match );
106
107	void 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
110	void ovs_flow_masks_rebalance(struct flow_table *table);
111	void table_instance_flow_flush(struct flow_table *table,
112	struct table_instance *ti,
113	struct table_instance *ufid_ti);
114
115	#endif /* flow_table.h */