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 { 42 struct rcu_head rcu; 43 int count, max; 44 u64 __percpu *masks_usage_cntr; 45 u64 *masks_usage_zero_cntr; 46 struct u64_stats_sync syncp; 47 struct sw_flow_mask __rcu *masks[]; 48 }; 49 50 struct table_instance { 51 struct hlist_head *buckets; 52 unsigned int n_buckets; 53 struct rcu_head rcu; 54 int node_ver; 55 u32 hash_seed; 56 bool keep_flows; 57 }; 58 59 struct flow_table { 60 struct table_instance __rcu *ti; 61 struct table_instance __rcu *ufid_ti; 62 struct mask_cache __rcu *mask_cache; 63 struct mask_array __rcu *mask_array; 64 unsigned long last_rehash; 65 unsigned int count; 66 unsigned int ufid_count; 67 }; 68 69 extern struct kmem_cache *flow_stats_cache; 70 71 int ovs_flow_init(void); 72 void ovs_flow_exit(void); 73 74 struct sw_flow *ovs_flow_alloc(void); 75 void ovs_flow_free(struct sw_flow *, bool deferred); 76 77 int ovs_flow_tbl_init(struct flow_table *); 78 int ovs_flow_tbl_count(const struct flow_table *table); 79 void ovs_flow_tbl_destroy(struct flow_table *table); 80 int ovs_flow_tbl_flush(struct flow_table *flow_table); 81 82 int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow, 83 const struct sw_flow_mask *mask); 84 void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow); 85 int ovs_flow_tbl_num_masks(const struct flow_table *table); 86 u32 ovs_flow_tbl_masks_cache_size(const struct flow_table *table); 87 int ovs_flow_tbl_masks_cache_resize(struct flow_table *table, u32 size); 88 struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *table, 89 u32 *bucket, u32 *idx); 90 struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *, 91 const struct sw_flow_key *, 92 u32 skb_hash, 93 u32 *n_mask_hit, 94 u32 *n_cache_hit); 95 struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *, 96 const struct sw_flow_key *); 97 struct sw_flow *ovs_flow_tbl_lookup_exact(struct flow_table *tbl, 98 const struct sw_flow_match *match); 99 struct sw_flow *ovs_flow_tbl_lookup_ufid(struct flow_table *, 100 const struct sw_flow_id *); 101 102 bool ovs_flow_cmp(const struct sw_flow *, const struct sw_flow_match *); 103 104 void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src, 105 bool full, const struct sw_flow_mask *mask); 106 107 void ovs_flow_masks_rebalance(struct flow_table *table); 108 void table_instance_flow_flush(struct flow_table *table, 109 struct table_instance *ti, 110 struct table_instance *ufid_ti); 111 112 #endif /* flow_table.h */ 113