net/openvswitch/flow_table.h

   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 };
  57
  58 struct flow_table {
  59         struct table_instance __rcu *ti;
  60         struct table_instance __rcu *ufid_ti;
  61         struct mask_cache __rcu *mask_cache;
  62         struct mask_array __rcu *mask_array;
  63         unsigned long last_rehash;
  64         unsigned int count;
  65         unsigned int ufid_count;
  66 };
  67
  68 extern struct kmem_cache *flow_stats_cache;
  69
  70 int ovs_flow_init(void);
  71 void ovs_flow_exit(void);
  72
  73 struct sw_flow *ovs_flow_alloc(void);
  74 void ovs_flow_free(struct sw_flow *, bool deferred);
  75
  76 int ovs_flow_tbl_init(struct flow_table *);
  77 int ovs_flow_tbl_count(const struct flow_table *table);
  78 void ovs_flow_tbl_destroy(struct flow_table *table);
  79 int ovs_flow_tbl_flush(struct flow_table *flow_table);
  80
  81 int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow,
  82                         const struct sw_flow_mask *mask);
  83 void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow);
  84 int  ovs_flow_tbl_num_masks(const struct flow_table *table);
  85 u32  ovs_flow_tbl_masks_cache_size(const struct flow_table *table);
  86 int  ovs_flow_tbl_masks_cache_resize(struct flow_table *table, u32 size);
  87 struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *table,
  88                                        u32 *bucket, u32 *idx);
  89 struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *,
  90                                           const struct sw_flow_key *,
  91                                           u32 skb_hash,
  92                                           u32 *n_mask_hit,
  93                                           u32 *n_cache_hit);
  94 struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *,
  95                                     const struct sw_flow_key *);
  96 struct sw_flow *ovs_flow_tbl_lookup_exact(struct flow_table *tbl,
  97                                           const struct sw_flow_match *match);
  98 struct sw_flow *ovs_flow_tbl_lookup_ufid(struct flow_table *,
  99                                          const struct sw_flow_id *);
 100
 101 bool ovs_flow_cmp(const struct sw_flow *, const struct sw_flow_match *);
 102
 103 void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src,
 104                        bool full, const struct sw_flow_mask *mask);
 105
 106 void ovs_flow_masks_rebalance(struct flow_table *table);
 107 void table_instance_flow_flush(struct flow_table *table,
 108                                struct table_instance *ti,
 109                                struct table_instance *ufid_ti);
 110
 111 #endif /* flow_table.h */