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 33 #include <net/inet_ecn.h> 34 #include <net/ip_tunnels.h> 35 36 #include "flow.h" 37 38 struct table_instance { 39 struct hlist_head *buckets; 40 unsigned int n_buckets; 41 struct rcu_head rcu; 42 int node_ver; 43 u32 hash_seed; 44 bool keep_flows; 45 }; 46 47 struct flow_table { 48 struct table_instance __rcu *ti; 49 struct table_instance __rcu *ufid_ti; 50 struct list_head mask_list; 51 unsigned long last_rehash; 52 unsigned int count; 53 unsigned int ufid_count; 54 }; 55 56 extern struct kmem_cache *flow_stats_cache; 57 58 int ovs_flow_init(void); 59 void ovs_flow_exit(void); 60 61 struct sw_flow *ovs_flow_alloc(void); 62 void ovs_flow_free(struct sw_flow *, bool deferred); 63 64 int ovs_flow_tbl_init(struct flow_table *); 65 int ovs_flow_tbl_count(const struct flow_table *table); 66 void ovs_flow_tbl_destroy(struct flow_table *table); 67 int ovs_flow_tbl_flush(struct flow_table *flow_table); 68 69 int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow, 70 const struct sw_flow_mask *mask); 71 void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow); 72 int ovs_flow_tbl_num_masks(const struct flow_table *table); 73 struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *table, 74 u32 *bucket, u32 *idx); 75 struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *, 76 const struct sw_flow_key *, 77 u32 *n_mask_hit); 78 struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *, 79 const struct sw_flow_key *); 80 struct sw_flow *ovs_flow_tbl_lookup_exact(struct flow_table *tbl, 81 const struct sw_flow_match *match); 82 struct sw_flow *ovs_flow_tbl_lookup_ufid(struct flow_table *, 83 const struct sw_flow_id *); 84 85 bool ovs_flow_cmp(const struct sw_flow *, const struct sw_flow_match *); 86 87 void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src, 88 bool full, const struct sw_flow_mask *mask); 89 #endif /* flow_table.h */ 90