xref: /openbmc/linux/net/openvswitch/flow_table.h (revision b34e08d5)
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 
39 struct 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 
48 struct flow_table {
49 	struct table_instance __rcu *ti;
50 	struct list_head mask_list;
51 	unsigned long last_rehash;
52 	unsigned int count;
53 };
54 
55 int ovs_flow_init(void);
56 void ovs_flow_exit(void);
57 
58 struct sw_flow *ovs_flow_alloc(bool percpu_stats);
59 void ovs_flow_free(struct sw_flow *, bool deferred);
60 
61 int ovs_flow_tbl_init(struct flow_table *);
62 int ovs_flow_tbl_count(struct flow_table *table);
63 void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred);
64 int ovs_flow_tbl_flush(struct flow_table *flow_table);
65 
66 int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow,
67 			struct sw_flow_mask *mask);
68 void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow);
69 int  ovs_flow_tbl_num_masks(const struct flow_table *table);
70 struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *table,
71 				       u32 *bucket, u32 *idx);
72 struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *,
73 				    const struct sw_flow_key *,
74 				    u32 *n_mask_hit);
75 struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *,
76 				    const struct sw_flow_key *);
77 
78 bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow,
79 			       struct sw_flow_match *match);
80 
81 void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src,
82 		       const struct sw_flow_mask *mask);
83 #endif /* flow_table.h */
84