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/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>
35 #include <net/inet_ecn.h>
36 #include <net/ip_tunnels.h>
40 /* Used to memset ovs_key_ipv4_tunnel padding. */
41 #define OVS_TUNNEL_KEY_SIZE \
42 (offsetof(struct ovs_key_ipv4_tunnel, ipv4_ttl) + \
43 FIELD_SIZEOF(struct ovs_key_ipv4_tunnel, ipv4_ttl))
45 struct ovs_key_ipv4_tunnel {
54 static inline void ovs_flow_tun_key_init(struct ovs_key_ipv4_tunnel *tun_key,
55 const struct iphdr *iph, __be64 tun_id,
58 tun_key->tun_id = tun_id;
59 tun_key->ipv4_src = iph->saddr;
60 tun_key->ipv4_dst = iph->daddr;
61 tun_key->ipv4_tos = iph->tos;
62 tun_key->ipv4_ttl = iph->ttl;
63 tun_key->tun_flags = tun_flags;
65 /* clear struct padding. */
66 memset((unsigned char *) tun_key + OVS_TUNNEL_KEY_SIZE, 0,
67 sizeof(*tun_key) - OVS_TUNNEL_KEY_SIZE);
71 struct ovs_key_ipv4_tunnel tun_key; /* Encapsulating tunnel key. */
73 u32 priority; /* Packet QoS priority. */
74 u32 skb_mark; /* SKB mark. */
75 u16 in_port; /* Input switch port (or DP_MAX_PORTS). */
78 u8 src[ETH_ALEN]; /* Ethernet source address. */
79 u8 dst[ETH_ALEN]; /* Ethernet destination address. */
80 __be16 tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */
81 __be16 type; /* Ethernet frame type. */
84 u8 proto; /* IP protocol or lower 8 bits of ARP opcode. */
86 u8 ttl; /* IP TTL/hop limit. */
87 u8 frag; /* One of OVS_FRAG_TYPE_*. */
92 __be32 src; /* IP source address. */
93 __be32 dst; /* IP destination address. */
97 __be16 src; /* TCP/UDP/SCTP source port. */
98 __be16 dst; /* TCP/UDP/SCTP destination port. */
99 __be16 flags; /* TCP flags. */
102 u8 sha[ETH_ALEN]; /* ARP source hardware address. */
103 u8 tha[ETH_ALEN]; /* ARP target hardware address. */
109 struct in6_addr src; /* IPv6 source address. */
110 struct in6_addr dst; /* IPv6 destination address. */
112 __be32 label; /* IPv6 flow label. */
114 __be16 src; /* TCP/UDP/SCTP source port. */
115 __be16 dst; /* TCP/UDP/SCTP destination port. */
116 __be16 flags; /* TCP flags. */
119 struct in6_addr target; /* ND target address. */
120 u8 sll[ETH_ALEN]; /* ND source link layer address. */
121 u8 tll[ETH_ALEN]; /* ND target link layer address. */
125 } __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */
127 struct sw_flow_key_range {
128 unsigned short int start;
129 unsigned short int end;
132 struct sw_flow_mask {
135 struct list_head list;
136 struct sw_flow_key_range range;
137 struct sw_flow_key key;
140 struct sw_flow_match {
141 struct sw_flow_key *key;
142 struct sw_flow_key_range range;
143 struct sw_flow_mask *mask;
146 struct sw_flow_actions {
149 struct nlattr actions[];
153 u64 packet_count; /* Number of packets matched. */
154 u64 byte_count; /* Number of bytes matched. */
155 unsigned long used; /* Last used time (in jiffies). */
156 spinlock_t lock; /* Lock for atomic stats update. */
157 __be16 tcp_flags; /* Union of seen TCP flags. */
162 struct hlist_node hash_node[2];
164 int stats_last_writer; /* NUMA-node id of the last writer on
167 struct sw_flow_key key;
168 struct sw_flow_key unmasked_key;
169 struct sw_flow_mask *mask;
170 struct sw_flow_actions __rcu *sf_acts;
171 struct flow_stats __rcu *stats[]; /* One for each NUMA node. First one
172 * is allocated at flow creation time,
173 * the rest are allocated on demand
174 * while holding the 'stats[0].lock'.
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) */
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 */
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);
196 u64 ovs_flow_used_time(unsigned long flow_jiffies);
198 int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *);