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ccb1352e | 1 | /* |
03f0d916 | 2 | * Copyright (c) 2007-2013 Nicira, Inc. |
ccb1352e JG |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
17 | */ | |
18 | ||
19 | #ifndef FLOW_H | |
20 | #define FLOW_H 1 | |
21 | ||
e298e505 | 22 | #include <linux/cache.h> |
ccb1352e JG |
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 | ||
36 | struct sk_buff; | |
ccb1352e | 37 | |
7d5437c7 PS |
38 | /* Used to memset ovs_key_ipv4_tunnel padding. */ |
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 | ||
43 | struct ovs_key_ipv4_tunnel { | |
44 | __be64 tun_id; | |
45 | __be32 ipv4_src; | |
46 | __be32 ipv4_dst; | |
aa310701 | 47 | __be16 tun_flags; |
7d5437c7 PS |
48 | u8 ipv4_tos; |
49 | u8 ipv4_ttl; | |
50 | }; | |
51 | ||
aa310701 PS |
52 | static 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 | /* clear struct padding. */ | |
64 | memset((unsigned char *) tun_key + OVS_TUNNEL_KEY_SIZE, 0, | |
65 | sizeof(*tun_key) - OVS_TUNNEL_KEY_SIZE); | |
66 | } | |
67 | ||
ccb1352e | 68 | struct sw_flow_key { |
7d5437c7 | 69 | struct ovs_key_ipv4_tunnel tun_key; /* Encapsulating tunnel key. */ |
ccb1352e JG |
70 | struct { |
71 | u32 priority; /* Packet QoS priority. */ | |
39c7caeb | 72 | u32 skb_mark; /* SKB mark. */ |
15eac2a7 | 73 | u16 in_port; /* Input switch port (or DP_MAX_PORTS). */ |
ccb1352e JG |
74 | } phy; |
75 | struct { | |
76 | u8 src[ETH_ALEN]; /* Ethernet source address. */ | |
77 | u8 dst[ETH_ALEN]; /* Ethernet destination address. */ | |
78 | __be16 tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */ | |
79 | __be16 type; /* Ethernet frame type. */ | |
80 | } eth; | |
81 | struct { | |
82 | u8 proto; /* IP protocol or lower 8 bits of ARP opcode. */ | |
83 | u8 tos; /* IP ToS. */ | |
84 | u8 ttl; /* IP TTL/hop limit. */ | |
85 | u8 frag; /* One of OVS_FRAG_TYPE_*. */ | |
86 | } ip; | |
87 | union { | |
88 | struct { | |
89 | struct { | |
90 | __be32 src; /* IP source address. */ | |
91 | __be32 dst; /* IP destination address. */ | |
92 | } addr; | |
93 | union { | |
94 | struct { | |
a175a723 JS |
95 | __be16 src; /* TCP/UDP/SCTP source port. */ |
96 | __be16 dst; /* TCP/UDP/SCTP destination port. */ | |
5eb26b15 | 97 | __be16 flags; /* TCP flags. */ |
ccb1352e JG |
98 | } tp; |
99 | struct { | |
100 | u8 sha[ETH_ALEN]; /* ARP source hardware address. */ | |
101 | u8 tha[ETH_ALEN]; /* ARP target hardware address. */ | |
102 | } arp; | |
103 | }; | |
104 | } ipv4; | |
105 | struct { | |
106 | struct { | |
107 | struct in6_addr src; /* IPv6 source address. */ | |
108 | struct in6_addr dst; /* IPv6 destination address. */ | |
109 | } addr; | |
110 | __be32 label; /* IPv6 flow label. */ | |
111 | struct { | |
a175a723 JS |
112 | __be16 src; /* TCP/UDP/SCTP source port. */ |
113 | __be16 dst; /* TCP/UDP/SCTP destination port. */ | |
5eb26b15 | 114 | __be16 flags; /* TCP flags. */ |
ccb1352e JG |
115 | } tp; |
116 | struct { | |
117 | struct in6_addr target; /* ND target address. */ | |
118 | u8 sll[ETH_ALEN]; /* ND source link layer address. */ | |
119 | u8 tll[ETH_ALEN]; /* ND target link layer address. */ | |
120 | } nd; | |
121 | } ipv6; | |
122 | }; | |
0d40f75b | 123 | } __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */ |
ccb1352e | 124 | |
e6445719 | 125 | struct sw_flow_key_range { |
8f49ce11 BP |
126 | unsigned short int start; |
127 | unsigned short int end; | |
e6445719 PS |
128 | }; |
129 | ||
130 | struct sw_flow_mask { | |
131 | int ref_count; | |
132 | struct rcu_head rcu; | |
133 | struct list_head list; | |
134 | struct sw_flow_key_range range; | |
135 | struct sw_flow_key key; | |
136 | }; | |
137 | ||
138 | struct sw_flow_match { | |
139 | struct sw_flow_key *key; | |
140 | struct sw_flow_key_range range; | |
141 | struct sw_flow_mask *mask; | |
142 | }; | |
143 | ||
144 | struct sw_flow_actions { | |
145 | struct rcu_head rcu; | |
146 | u32 actions_len; | |
147 | struct nlattr actions[]; | |
148 | }; | |
149 | ||
e298e505 PS |
150 | struct flow_stats { |
151 | u64 packet_count; /* Number of packets matched. */ | |
152 | u64 byte_count; /* Number of bytes matched. */ | |
153 | unsigned long used; /* Last used time (in jiffies). */ | |
154 | spinlock_t lock; /* Lock for atomic stats update. */ | |
155 | __be16 tcp_flags; /* Union of seen TCP flags. */ | |
156 | }; | |
157 | ||
158 | struct sw_flow_stats { | |
159 | bool is_percpu; | |
160 | union { | |
161 | struct flow_stats *stat; | |
162 | struct flow_stats __percpu *cpu_stats; | |
163 | }; | |
164 | }; | |
165 | ||
ccb1352e JG |
166 | struct sw_flow { |
167 | struct rcu_head rcu; | |
168 | struct hlist_node hash_node[2]; | |
169 | u32 hash; | |
170 | ||
171 | struct sw_flow_key key; | |
03f0d916 AZ |
172 | struct sw_flow_key unmasked_key; |
173 | struct sw_flow_mask *mask; | |
ccb1352e | 174 | struct sw_flow_actions __rcu *sf_acts; |
e298e505 | 175 | struct sw_flow_stats stats; |
ccb1352e JG |
176 | }; |
177 | ||
178 | struct arp_eth_header { | |
179 | __be16 ar_hrd; /* format of hardware address */ | |
180 | __be16 ar_pro; /* format of protocol address */ | |
181 | unsigned char ar_hln; /* length of hardware address */ | |
182 | unsigned char ar_pln; /* length of protocol address */ | |
183 | __be16 ar_op; /* ARP opcode (command) */ | |
184 | ||
185 | /* Ethernet+IPv4 specific members. */ | |
186 | unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ | |
187 | unsigned char ar_sip[4]; /* sender IP address */ | |
188 | unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ | |
189 | unsigned char ar_tip[4]; /* target IP address */ | |
190 | } __packed; | |
191 | ||
e298e505 PS |
192 | void ovs_flow_stats_update(struct sw_flow *flow, struct sk_buff *skb); |
193 | void ovs_flow_stats_get(struct sw_flow *flow, struct ovs_flow_stats *stats, | |
194 | unsigned long *used, __be16 *tcp_flags); | |
195 | void ovs_flow_stats_clear(struct sw_flow *flow); | |
ccb1352e | 196 | u64 ovs_flow_used_time(unsigned long flow_jiffies); |
ccb1352e | 197 | |
e6445719 | 198 | int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *); |
03f0d916 | 199 | |
ccb1352e | 200 | #endif /* flow.h */ |