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_array { 31 struct rcu_head rcu; 32 int count, max; 33 struct sw_flow_mask __rcu *masks[]; 34 }; 35 36 struct table_instance { 37 struct hlist_head *buckets; 38 unsigned int n_buckets; 39 struct rcu_head rcu; 40 int node_ver; 41 u32 hash_seed; 42 bool keep_flows; 43 }; 44 45 struct flow_table { 46 struct table_instance __rcu *ti; 47 struct table_instance __rcu *ufid_ti; 48 struct mask_cache_entry __percpu *mask_cache; 49 struct mask_array __rcu *mask_array; 50 unsigned long last_rehash; 51 unsigned int count; 52 unsigned int ufid_count; 53 }; 54 55 extern struct kmem_cache *flow_stats_cache; 56 57 int ovs_flow_init(void); 58 void ovs_flow_exit(void); 59 60 struct sw_flow *ovs_flow_alloc(void); 61 void ovs_flow_free(struct sw_flow *, bool deferred); 62 63 int ovs_flow_tbl_init(struct flow_table *); 64 int ovs_flow_tbl_count(const struct flow_table *table); 65 void ovs_flow_tbl_destroy(struct flow_table *table); 66 int ovs_flow_tbl_flush(struct flow_table *flow_table); 67 68 int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow, 69 const struct sw_flow_mask *mask); 70 void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow); 71 int ovs_flow_tbl_num_masks(const struct flow_table *table); 72 struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *table, 73 u32 *bucket, u32 *idx); 74 struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *, 75 const struct sw_flow_key *, 76 u32 skb_hash, 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