1/*
2 * Copyright (c) 2007-2013 Nicira, Inc.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
16 * 02110-1301, USA
17 */
18
19#ifndef FLOW_TABLE_H
20#define FLOW_TABLE_H 1
21
22#include <linux/kernel.h>
23#include <linux/netlink.h>
24#include <linux/openvswitch.h>
25#include <linux/spinlock.h>
26#include <linux/types.h>
27#include <linux/rcupdate.h>
28#include <linux/if_ether.h>
29#include <linux/in6.h>
30#include <linux/jiffies.h>
31#include <linux/time.h>
32#include <linux/flex_array.h>
33
34#include <net/inet_ecn.h>
35#include <net/ip_tunnels.h>
36
37#include "flow.h"
38
39struct table_instance {
40	struct flex_array *buckets;
41	unsigned int n_buckets;
42	struct rcu_head rcu;
43	int node_ver;
44	u32 hash_seed;
45	bool keep_flows;
46};
47
48struct flow_table {
49	struct table_instance __rcu *ti;
50	struct table_instance __rcu *ufid_ti;
51	struct list_head mask_list;
52	unsigned long last_rehash;
53	unsigned int count;
54	unsigned int ufid_count;
55};
56
57extern struct kmem_cache *flow_stats_cache;
58
59int ovs_flow_init(void);
60void ovs_flow_exit(void);
61
62struct sw_flow *ovs_flow_alloc(void);
63void ovs_flow_free(struct sw_flow *, bool deferred);
64
65int ovs_flow_tbl_init(struct flow_table *);
66int ovs_flow_tbl_count(const struct flow_table *table);
67void ovs_flow_tbl_destroy(struct flow_table *table);
68int ovs_flow_tbl_flush(struct flow_table *flow_table);
69
70int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow,
71			const struct sw_flow_mask *mask);
72void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow);
73int  ovs_flow_tbl_num_masks(const struct flow_table *table);
74struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *table,
75				       u32 *bucket, u32 *idx);
76struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *,
77				    const struct sw_flow_key *,
78				    u32 *n_mask_hit);
79struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *,
80				    const struct sw_flow_key *);
81struct sw_flow *ovs_flow_tbl_lookup_exact(struct flow_table *tbl,
82					  const struct sw_flow_match *match);
83struct sw_flow *ovs_flow_tbl_lookup_ufid(struct flow_table *,
84					 const struct sw_flow_id *);
85
86bool ovs_flow_cmp(const struct sw_flow *, const struct sw_flow_match *);
87
88void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src,
89		       bool full, const struct sw_flow_mask *mask);
90#endif /* flow_table.h */
91