2 * Copyright (c) 2007-2014 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 {
52 } __packed __aligned(4); /* Minimize padding. */
54 struct ovs_tunnel_info {
55 struct ovs_key_ipv4_tunnel tunnel;
58 static inline void ovs_flow_tun_info_init(struct ovs_tunnel_info *tun_info,
59 const struct iphdr *iph, __be64 tun_id,
62 tun_info->tunnel.tun_id = tun_id;
63 tun_info->tunnel.ipv4_src = iph->saddr;
64 tun_info->tunnel.ipv4_dst = iph->daddr;
65 tun_info->tunnel.ipv4_tos = iph->tos;
66 tun_info->tunnel.ipv4_ttl = iph->ttl;
67 tun_info->tunnel.tun_flags = tun_flags;
69 /* clear struct padding. */
70 memset((unsigned char *) &tun_info->tunnel + OVS_TUNNEL_KEY_SIZE, 0,
71 sizeof(tun_info->tunnel) - OVS_TUNNEL_KEY_SIZE);
75 struct ovs_key_ipv4_tunnel tun_key; /* Encapsulating tunnel key. */
77 u32 priority; /* Packet QoS priority. */
78 u32 skb_mark; /* SKB mark. */
79 u16 in_port; /* Input switch port (or DP_MAX_PORTS). */
80 } __packed phy; /* Safe when right after 'tun_key'. */
81 u32 ovs_flow_hash; /* Datapath computed hash value. */
82 u32 recirc_id; /* Recirculation ID. */
84 u8 src[ETH_ALEN]; /* Ethernet source address. */
85 u8 dst[ETH_ALEN]; /* Ethernet destination address. */
86 __be16 tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */
87 __be16 type; /* Ethernet frame type. */
90 u8 proto; /* IP protocol or lower 8 bits of ARP opcode. */
92 u8 ttl; /* IP TTL/hop limit. */
93 u8 frag; /* One of OVS_FRAG_TYPE_*. */
96 __be16 src; /* TCP/UDP/SCTP source port. */
97 __be16 dst; /* TCP/UDP/SCTP destination port. */
98 __be16 flags; /* TCP flags. */
103 __be32 src; /* IP source address. */
104 __be32 dst; /* IP destination address. */
107 u8 sha[ETH_ALEN]; /* ARP source hardware address. */
108 u8 tha[ETH_ALEN]; /* ARP target hardware address. */
113 struct in6_addr src; /* IPv6 source address. */
114 struct in6_addr dst; /* IPv6 destination address. */
116 __be32 label; /* IPv6 flow label. */
118 struct in6_addr target; /* ND target address. */
119 u8 sll[ETH_ALEN]; /* ND source link layer address. */
120 u8 tll[ETH_ALEN]; /* ND target link layer address. */
124 } __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */
126 struct sw_flow_key_range {
127 unsigned short int start;
128 unsigned short int end;
131 struct sw_flow_mask {
134 struct sw_flow_key_range range;
135 struct sw_flow_key key;
138 struct sw_flow_match {
139 struct sw_flow_key *key;
140 struct sw_flow_key_range range;
141 struct sw_flow_mask *mask;
144 struct sw_flow_actions {
147 struct nlattr actions[];
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. */
160 struct hlist_node hash_node[2];
162 int stats_last_writer; /* NUMA-node id of the last writer on
165 struct sw_flow_key key;
166 struct sw_flow_key unmasked_key;
167 struct sw_flow_mask *mask;
168 struct sw_flow_actions __rcu *sf_acts;
169 struct flow_stats __rcu *stats[]; /* One for each NUMA node. First one
170 * is allocated at flow creation time,
171 * the rest are allocated on demand
172 * while holding the 'stats[0].lock'.
176 struct arp_eth_header {
177 __be16 ar_hrd; /* format of hardware address */
178 __be16 ar_pro; /* format of protocol address */
179 unsigned char ar_hln; /* length of hardware address */
180 unsigned char ar_pln; /* length of protocol address */
181 __be16 ar_op; /* ARP opcode (command) */
183 /* Ethernet+IPv4 specific members. */
184 unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
185 unsigned char ar_sip[4]; /* sender IP address */
186 unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
187 unsigned char ar_tip[4]; /* target IP address */
190 void ovs_flow_stats_update(struct sw_flow *, __be16 tcp_flags,
192 void ovs_flow_stats_get(const struct sw_flow *, struct ovs_flow_stats *,
193 unsigned long *used, __be16 *tcp_flags);
194 void ovs_flow_stats_clear(struct sw_flow *);
195 u64 ovs_flow_used_time(unsigned long flow_jiffies);
197 int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *);