2 * Copyright (c) 2007-2013 Nicira, Inc.
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.
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.
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
22 #include <linux/kernel.h>
23 #include <linux/netlink.h>
24 #include <linux/openvswitch.h>
25 #include <linux/spinlock.h>
26 #include <linux/types.h>
27 #include <linux/rcupdate.h>
28 #include <linux/if_ether.h>
29 #include <linux/in6.h>
30 #include <linux/jiffies.h>
31 #include <linux/time.h>
32 #include <linux/flex_array.h>
33 #include <net/inet_ecn.h>
37 /* Used to memset ovs_key_ipv4_tunnel padding. */
38 #define OVS_TUNNEL_KEY_SIZE \
39 (offsetof(struct ovs_key_ipv4_tunnel, ipv4_ttl) + \
40 FIELD_SIZEOF(struct ovs_key_ipv4_tunnel, ipv4_ttl))
42 struct ovs_key_ipv4_tunnel {
51 static inline void ovs_flow_tun_key_init(struct ovs_key_ipv4_tunnel *tun_key,
52 const struct iphdr *iph, __be64 tun_id,
55 tun_key->tun_id = tun_id;
56 tun_key->ipv4_src = iph->saddr;
57 tun_key->ipv4_dst = iph->daddr;
58 tun_key->ipv4_tos = iph->tos;
59 tun_key->ipv4_ttl = iph->ttl;
60 tun_key->tun_flags = tun_flags;
62 /* clear struct padding. */
63 memset((unsigned char *) tun_key + OVS_TUNNEL_KEY_SIZE, 0,
64 sizeof(*tun_key) - OVS_TUNNEL_KEY_SIZE);
68 struct ovs_key_ipv4_tunnel tun_key; /* Encapsulating tunnel key. */
70 u32 priority; /* Packet QoS priority. */
71 u32 skb_mark; /* SKB mark. */
72 u16 in_port; /* Input switch port (or DP_MAX_PORTS). */
75 u8 src[ETH_ALEN]; /* Ethernet source address. */
76 u8 dst[ETH_ALEN]; /* Ethernet destination address. */
77 __be16 tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */
78 __be16 type; /* Ethernet frame type. */
81 u8 proto; /* IP protocol or lower 8 bits of ARP opcode. */
83 u8 ttl; /* IP TTL/hop limit. */
84 u8 frag; /* One of OVS_FRAG_TYPE_*. */
89 __be32 src; /* IP source address. */
90 __be32 dst; /* IP destination address. */
94 __be16 src; /* TCP/UDP/SCTP source port. */
95 __be16 dst; /* TCP/UDP/SCTP destination port. */
96 __be16 flags; /* TCP flags. */
99 u8 sha[ETH_ALEN]; /* ARP source hardware address. */
100 u8 tha[ETH_ALEN]; /* ARP target hardware address. */
106 struct in6_addr src; /* IPv6 source address. */
107 struct in6_addr dst; /* IPv6 destination address. */
109 __be32 label; /* IPv6 flow label. */
111 __be16 src; /* TCP/UDP/SCTP source port. */
112 __be16 dst; /* TCP/UDP/SCTP destination port. */
113 __be16 flags; /* TCP flags. */
116 struct in6_addr target; /* ND target address. */
117 u8 sll[ETH_ALEN]; /* ND source link layer address. */
118 u8 tll[ETH_ALEN]; /* ND target link layer address. */
122 } __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */
124 struct sw_flow_key_range {
125 unsigned short int start;
126 unsigned short int end;
129 struct sw_flow_mask {
132 struct list_head list;
133 struct sw_flow_key_range range;
134 struct sw_flow_key key;
137 struct sw_flow_match {
138 struct sw_flow_key *key;
139 struct sw_flow_key_range range;
140 struct sw_flow_mask *mask;
143 struct sw_flow_actions {
146 struct nlattr actions[];
151 struct hlist_node hash_node[2];
154 struct sw_flow_key key;
155 struct sw_flow_key unmasked_key;
156 struct sw_flow_mask *mask;
157 struct sw_flow_actions __rcu *sf_acts;
159 spinlock_t lock; /* Lock for values below. */
160 unsigned long used; /* Last used time (in jiffies). */
161 u64 packet_count; /* Number of packets matched. */
162 u64 byte_count; /* Number of bytes matched. */
163 __be16 tcp_flags; /* Union of seen TCP flags. */
166 struct arp_eth_header {
167 __be16 ar_hrd; /* format of hardware address */
168 __be16 ar_pro; /* format of protocol address */
169 unsigned char ar_hln; /* length of hardware address */
170 unsigned char ar_pln; /* length of protocol address */
171 __be16 ar_op; /* ARP opcode (command) */
173 /* Ethernet+IPv4 specific members. */
174 unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
175 unsigned char ar_sip[4]; /* sender IP address */
176 unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
177 unsigned char ar_tip[4]; /* target IP address */
180 void ovs_flow_used(struct sw_flow *, struct sk_buff *);
181 u64 ovs_flow_used_time(unsigned long flow_jiffies);
183 int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *);