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;
56 struct geneve_opt *options;
60 /* Store options at the end of the array if they are less than the
61 * maximum size. This allows us to get the benefits of variable length
62 * matching for small options.
64 #define GENEVE_OPTS(flow_key, opt_len) (struct geneve_opt *) \
65 ((flow_key)->tun_opts + \
66 FIELD_SIZEOF(struct sw_flow_key, tun_opts) - \
69 static inline void ovs_flow_tun_info_init(struct ovs_tunnel_info *tun_info,
70 const struct iphdr *iph, __be64 tun_id,
72 struct geneve_opt *opts,
75 tun_info->tunnel.tun_id = tun_id;
76 tun_info->tunnel.ipv4_src = iph->saddr;
77 tun_info->tunnel.ipv4_dst = iph->daddr;
78 tun_info->tunnel.ipv4_tos = iph->tos;
79 tun_info->tunnel.ipv4_ttl = iph->ttl;
80 tun_info->tunnel.tun_flags = tun_flags;
82 /* clear struct padding. */
83 memset((unsigned char *) &tun_info->tunnel + OVS_TUNNEL_KEY_SIZE, 0,
84 sizeof(tun_info->tunnel) - OVS_TUNNEL_KEY_SIZE);
86 tun_info->options = opts;
87 tun_info->options_len = opts_len;
90 #define OVS_SW_FLOW_KEY_METADATA_SIZE \
91 (offsetof(struct sw_flow_key, recirc_id) + \
92 FIELD_SIZEOF(struct sw_flow_key, recirc_id))
98 struct ovs_key_ipv4_tunnel tun_key; /* Encapsulating tunnel key. */
100 u32 priority; /* Packet QoS priority. */
101 u32 skb_mark; /* SKB mark. */
102 u16 in_port; /* Input switch port (or DP_MAX_PORTS). */
103 } __packed phy; /* Safe when right after 'tun_key'. */
104 u32 ovs_flow_hash; /* Datapath computed hash value. */
105 u32 recirc_id; /* Recirculation ID. */
107 u8 src[ETH_ALEN]; /* Ethernet source address. */
108 u8 dst[ETH_ALEN]; /* Ethernet destination address. */
109 __be16 tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */
110 __be16 type; /* Ethernet frame type. */
114 __be32 top_lse; /* top label stack entry */
117 u8 proto; /* IP protocol or lower 8 bits of ARP opcode. */
118 u8 tos; /* IP ToS. */
119 u8 ttl; /* IP TTL/hop limit. */
120 u8 frag; /* One of OVS_FRAG_TYPE_*. */
124 __be16 src; /* TCP/UDP/SCTP source port. */
125 __be16 dst; /* TCP/UDP/SCTP destination port. */
126 __be16 flags; /* TCP flags. */
131 __be32 src; /* IP source address. */
132 __be32 dst; /* IP destination address. */
135 u8 sha[ETH_ALEN]; /* ARP source hardware address. */
136 u8 tha[ETH_ALEN]; /* ARP target hardware address. */
141 struct in6_addr src; /* IPv6 source address. */
142 struct in6_addr dst; /* IPv6 destination address. */
144 __be32 label; /* IPv6 flow label. */
146 struct in6_addr target; /* ND target address. */
147 u8 sll[ETH_ALEN]; /* ND source link layer address. */
148 u8 tll[ETH_ALEN]; /* ND target link layer address. */
152 } __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */
154 struct sw_flow_key_range {
155 unsigned short int start;
156 unsigned short int end;
159 struct sw_flow_mask {
162 struct sw_flow_key_range range;
163 struct sw_flow_key key;
166 struct sw_flow_match {
167 struct sw_flow_key *key;
168 struct sw_flow_key_range range;
169 struct sw_flow_mask *mask;
172 struct sw_flow_actions {
175 struct nlattr actions[];
179 u64 packet_count; /* Number of packets matched. */
180 u64 byte_count; /* Number of bytes matched. */
181 unsigned long used; /* Last used time (in jiffies). */
182 spinlock_t lock; /* Lock for atomic stats update. */
183 __be16 tcp_flags; /* Union of seen TCP flags. */
188 struct hlist_node hash_node[2];
190 int stats_last_writer; /* NUMA-node id of the last writer on
193 struct sw_flow_key key;
194 struct sw_flow_key unmasked_key;
195 struct sw_flow_mask *mask;
196 struct sw_flow_actions __rcu *sf_acts;
197 struct flow_stats __rcu *stats[]; /* One for each NUMA node. First one
198 * is allocated at flow creation time,
199 * the rest are allocated on demand
200 * while holding the 'stats[0].lock'.
204 struct arp_eth_header {
205 __be16 ar_hrd; /* format of hardware address */
206 __be16 ar_pro; /* format of protocol address */
207 unsigned char ar_hln; /* length of hardware address */
208 unsigned char ar_pln; /* length of protocol address */
209 __be16 ar_op; /* ARP opcode (command) */
211 /* Ethernet+IPv4 specific members. */
212 unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
213 unsigned char ar_sip[4]; /* sender IP address */
214 unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
215 unsigned char ar_tip[4]; /* target IP address */
218 void ovs_flow_stats_update(struct sw_flow *, __be16 tcp_flags,
220 void ovs_flow_stats_get(const struct sw_flow *, struct ovs_flow_stats *,
221 unsigned long *used, __be16 *tcp_flags);
222 void ovs_flow_stats_clear(struct sw_flow *);
223 u64 ovs_flow_used_time(unsigned long flow_jiffies);
225 int ovs_flow_key_extract(const struct ovs_tunnel_info *tun_info,
226 struct sk_buff *skb, struct sw_flow_key *key);
227 /* Extract key from packet coming from userspace. */
228 int ovs_flow_key_extract_userspace(const struct nlattr *attr,
230 struct sw_flow_key *key);
231 /* Update the non-metadata part of the flow key using skb. */
232 int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key);