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
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