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_stats { 42 struct u64_stats_sync syncp; 43 u64 usage_cntrs[]; 44 }; 45 46 struct mask_array { 47 struct rcu_head rcu; 48 int count, max; 49 struct mask_array_stats __percpu *masks_usage_stats; 50 u64 *masks_usage_zero_cntr; 51 struct sw_flow_mask __rcu *masks[] __counted_by(max); 52 }; 53 54 struct table_instance { 55 struct hlist_head *buckets; 56 unsigned int n_buckets; 57 struct rcu_head rcu; 58 int node_ver; 59 u32 hash_seed; 60 }; 61 62 struct flow_table { 63 struct table_instance __rcu *ti; 64 struct table_instance __rcu *ufid_ti; 65 struct mask_cache __rcu *mask_cache; 66 struct mask_array __rcu *mask_array; 67 unsigned long last_rehash; 68 unsigned int count; 69 unsigned int ufid_count; 70 }; 71 72 extern struct kmem_cache *flow_stats_cache; 73 74 int ovs_flow_init(void); 75 void ovs_flow_exit(void); 76 77 struct sw_flow *ovs_flow_alloc(void); 78 void ovs_flow_free(struct sw_flow *, bool deferred); 79 80 int ovs_flow_tbl_init(struct flow_table *); 81 int ovs_flow_tbl_count(const struct flow_table *table); 82 void ovs_flow_tbl_destroy(struct flow_table *table); 83 int ovs_flow_tbl_flush(struct flow_table *flow_table); 84 85 int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow, 86 const struct sw_flow_mask *mask); 87 void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow); 88 int ovs_flow_tbl_num_masks(const struct flow_table *table); 89 u32 ovs_flow_tbl_masks_cache_size(const struct flow_table *table); 90 int ovs_flow_tbl_masks_cache_resize(struct flow_table *table, u32 size); 91 struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *table, 92 u32 *bucket, u32 *idx); 93 struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *, 94 const struct sw_flow_key *, 95 u32 skb_hash, 96 u32 *n_mask_hit, 97 u32 *n_cache_hit); 98 struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *, 99 const struct sw_flow_key *); 100 struct sw_flow *ovs_flow_tbl_lookup_exact(struct flow_table *tbl, 101 const struct sw_flow_match *match); 102 struct sw_flow *ovs_flow_tbl_lookup_ufid(struct flow_table *, 103 const struct sw_flow_id *); 104 105 bool ovs_flow_cmp(const struct sw_flow *, const struct sw_flow_match *); 106 107 void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src, 108 bool full, const struct sw_flow_mask *mask); 109 110 void ovs_flow_masks_rebalance(struct flow_table *table); 111 void table_instance_flow_flush(struct flow_table *table, 112 struct table_instance *ti, 113 struct table_instance *ufid_ti); 114 115 #endif /* flow_table.h */ 116