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_count { 31 int index; 32 u64 counter; 33 }; 34 35 struct mask_array { 36 struct rcu_head rcu; 37 int count, max; 38 u64 __percpu *masks_usage_cntr; 39 u64 *masks_usage_zero_cntr; 40 struct u64_stats_sync syncp; 41 struct sw_flow_mask __rcu *masks[]; 42 }; 43 44 struct table_instance { 45 struct hlist_head *buckets; 46 unsigned int n_buckets; 47 struct rcu_head rcu; 48 int node_ver; 49 u32 hash_seed; 50 bool keep_flows; 51 }; 52 53 struct flow_table { 54 struct table_instance __rcu *ti; 55 struct table_instance __rcu *ufid_ti; 56 struct mask_cache_entry __percpu *mask_cache; 57 struct mask_array __rcu *mask_array; 58 unsigned long last_rehash; 59 unsigned int count; 60 unsigned int ufid_count; 61 }; 62 63 extern struct kmem_cache *flow_stats_cache; 64 65 int ovs_flow_init(void); 66 void ovs_flow_exit(void); 67 68 struct sw_flow *ovs_flow_alloc(void); 69 void ovs_flow_free(struct sw_flow *, bool deferred); 70 71 int ovs_flow_tbl_init(struct flow_table *); 72 int ovs_flow_tbl_count(const struct flow_table *table); 73 void ovs_flow_tbl_destroy(struct flow_table *table); 74 int ovs_flow_tbl_flush(struct flow_table *flow_table); 75 76 int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow, 77 const struct sw_flow_mask *mask); 78 void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow); 79 int ovs_flow_tbl_num_masks(const struct flow_table *table); 80 struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *table, 81 u32 *bucket, u32 *idx); 82 struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *, 83 const struct sw_flow_key *, 84 u32 skb_hash, 85 u32 *n_mask_hit); 86 struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *, 87 const struct sw_flow_key *); 88 struct sw_flow *ovs_flow_tbl_lookup_exact(struct flow_table *tbl, 89 const struct sw_flow_match *match); 90 struct sw_flow *ovs_flow_tbl_lookup_ufid(struct flow_table *, 91 const struct sw_flow_id *); 92 93 bool ovs_flow_cmp(const struct sw_flow *, const struct sw_flow_match *); 94 95 void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src, 96 bool full, const struct sw_flow_mask *mask); 97 98 void ovs_flow_masks_rebalance(struct flow_table *table); 99 100 #endif /* flow_table.h */ 101