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19#ifndef FLOW_H
20#define FLOW_H 1
21
22#include <linux/cache.h>
23#include <linux/kernel.h>
24#include <linux/netlink.h>
25#include <linux/openvswitch.h>
26#include <linux/spinlock.h>
27#include <linux/types.h>
28#include <linux/rcupdate.h>
29#include <linux/if_ether.h>
30#include <linux/in6.h>
31#include <linux/jiffies.h>
32#include <linux/time.h>
33#include <linux/flex_array.h>
34#include <net/inet_ecn.h>
35
36struct sk_buff;
37
38
39#define OVS_TUNNEL_KEY_SIZE \
40 (offsetof(struct ovs_key_ipv4_tunnel, ipv4_ttl) + \
41 FIELD_SIZEOF(struct ovs_key_ipv4_tunnel, ipv4_ttl))
42
43struct ovs_key_ipv4_tunnel {
44 __be64 tun_id;
45 __be32 ipv4_src;
46 __be32 ipv4_dst;
47 __be16 tun_flags;
48 u8 ipv4_tos;
49 u8 ipv4_ttl;
50} __packed __aligned(4);
51
52static inline void ovs_flow_tun_key_init(struct ovs_key_ipv4_tunnel *tun_key,
53 const struct iphdr *iph, __be64 tun_id,
54 __be16 tun_flags)
55{
56 tun_key->tun_id = tun_id;
57 tun_key->ipv4_src = iph->saddr;
58 tun_key->ipv4_dst = iph->daddr;
59 tun_key->ipv4_tos = iph->tos;
60 tun_key->ipv4_ttl = iph->ttl;
61 tun_key->tun_flags = tun_flags;
62
63
64 memset((unsigned char *) tun_key + OVS_TUNNEL_KEY_SIZE, 0,
65 sizeof(*tun_key) - OVS_TUNNEL_KEY_SIZE);
66}
67
68struct sw_flow_key {
69 struct ovs_key_ipv4_tunnel tun_key;
70 struct {
71 u32 priority;
72 u32 skb_mark;
73 u16 in_port;
74 } __packed phy;
75 struct {
76 u8 src[ETH_ALEN];
77 u8 dst[ETH_ALEN];
78 __be16 tci;
79 __be16 type;
80 } eth;
81 struct {
82 u8 proto;
83 u8 tos;
84 u8 ttl;
85 u8 frag;
86 } ip;
87 struct {
88 __be16 src;
89 __be16 dst;
90 __be16 flags;
91 } tp;
92 union {
93 struct {
94 struct {
95 __be32 src;
96 __be32 dst;
97 } addr;
98 struct {
99 u8 sha[ETH_ALEN];
100 u8 tha[ETH_ALEN];
101 } arp;
102 } ipv4;
103 struct {
104 struct {
105 struct in6_addr src;
106 struct in6_addr dst;
107 } addr;
108 __be32 label;
109 struct {
110 struct in6_addr target;
111 u8 sll[ETH_ALEN];
112 u8 tll[ETH_ALEN];
113 } nd;
114 } ipv6;
115 };
116} __aligned(BITS_PER_LONG/8);
117
118struct sw_flow_key_range {
119 unsigned short int start;
120 unsigned short int end;
121};
122
123struct sw_flow_mask {
124 int ref_count;
125 struct rcu_head rcu;
126 struct list_head list;
127 struct sw_flow_key_range range;
128 struct sw_flow_key key;
129};
130
131struct sw_flow_match {
132 struct sw_flow_key *key;
133 struct sw_flow_key_range range;
134 struct sw_flow_mask *mask;
135};
136
137struct sw_flow_actions {
138 struct rcu_head rcu;
139 u32 actions_len;
140 struct nlattr actions[];
141};
142
143struct flow_stats {
144 u64 packet_count;
145 u64 byte_count;
146 unsigned long used;
147 spinlock_t lock;
148 __be16 tcp_flags;
149};
150
151struct sw_flow {
152 struct rcu_head rcu;
153 struct hlist_node hash_node[2];
154 u32 hash;
155 int stats_last_writer;
156
157
158 struct sw_flow_key key;
159 struct sw_flow_key unmasked_key;
160 struct sw_flow_mask *mask;
161 struct sw_flow_actions __rcu *sf_acts;
162 struct flow_stats __rcu *stats[];
163
164
165
166
167};
168
169struct arp_eth_header {
170 __be16 ar_hrd;
171 __be16 ar_pro;
172 unsigned char ar_hln;
173 unsigned char ar_pln;
174 __be16 ar_op;
175
176
177 unsigned char ar_sha[ETH_ALEN];
178 unsigned char ar_sip[4];
179 unsigned char ar_tha[ETH_ALEN];
180 unsigned char ar_tip[4];
181} __packed;
182
183void ovs_flow_stats_update(struct sw_flow *, __be16 tcp_flags,
184 struct sk_buff *);
185void ovs_flow_stats_get(const struct sw_flow *, struct ovs_flow_stats *,
186 unsigned long *used, __be16 *tcp_flags);
187void ovs_flow_stats_clear(struct sw_flow *);
188u64 ovs_flow_used_time(unsigned long flow_jiffies);
189
190int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *);
191
192#endif
193
