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ccb1352e | 1 | /* |
ad552007 | 2 | * Copyright (c) 2007-2014 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; | |
1139e241 | 50 | } __packed __aligned(4); /* Minimize padding. */ |
7d5437c7 | 51 | |
f0b128c1 JG |
52 | struct ovs_tunnel_info { |
53 | struct ovs_key_ipv4_tunnel tunnel; | |
f5796684 JG |
54 | struct geneve_opt *options; |
55 | u8 options_len; | |
f0b128c1 JG |
56 | }; |
57 | ||
f5796684 JG |
58 | /* Store options at the end of the array if they are less than the |
59 | * maximum size. This allows us to get the benefits of variable length | |
60 | * matching for small options. | |
61 | */ | |
62 | #define GENEVE_OPTS(flow_key, opt_len) \ | |
63 | ((struct geneve_opt *)((flow_key)->tun_opts + \ | |
64 | FIELD_SIZEOF(struct sw_flow_key, tun_opts) - \ | |
65 | opt_len)) | |
66 | ||
f0b128c1 JG |
67 | static inline void ovs_flow_tun_info_init(struct ovs_tunnel_info *tun_info, |
68 | const struct iphdr *iph, | |
f5796684 JG |
69 | __be64 tun_id, __be16 tun_flags, |
70 | struct geneve_opt *opts, | |
71 | u8 opts_len) | |
aa310701 | 72 | { |
f0b128c1 JG |
73 | tun_info->tunnel.tun_id = tun_id; |
74 | tun_info->tunnel.ipv4_src = iph->saddr; | |
75 | tun_info->tunnel.ipv4_dst = iph->daddr; | |
76 | tun_info->tunnel.ipv4_tos = iph->tos; | |
77 | tun_info->tunnel.ipv4_ttl = iph->ttl; | |
78 | tun_info->tunnel.tun_flags = tun_flags; | |
aa310701 PS |
79 | |
80 | /* clear struct padding. */ | |
f0b128c1 JG |
81 | memset((unsigned char *)&tun_info->tunnel + OVS_TUNNEL_KEY_SIZE, 0, |
82 | sizeof(tun_info->tunnel) - OVS_TUNNEL_KEY_SIZE); | |
f5796684 JG |
83 | |
84 | tun_info->options = opts; | |
85 | tun_info->options_len = opts_len; | |
aa310701 PS |
86 | } |
87 | ||
ccb1352e | 88 | struct sw_flow_key { |
f5796684 JG |
89 | u8 tun_opts[255]; |
90 | u8 tun_opts_len; | |
7d5437c7 | 91 | struct ovs_key_ipv4_tunnel tun_key; /* Encapsulating tunnel key. */ |
ccb1352e JG |
92 | struct { |
93 | u32 priority; /* Packet QoS priority. */ | |
39c7caeb | 94 | u32 skb_mark; /* SKB mark. */ |
15eac2a7 | 95 | u16 in_port; /* Input switch port (or DP_MAX_PORTS). */ |
1139e241 | 96 | } __packed phy; /* Safe when right after 'tun_key'. */ |
971427f3 AZ |
97 | u32 ovs_flow_hash; /* Datapath computed hash value. */ |
98 | u32 recirc_id; /* Recirculation ID. */ | |
ccb1352e JG |
99 | struct { |
100 | u8 src[ETH_ALEN]; /* Ethernet source address. */ | |
101 | u8 dst[ETH_ALEN]; /* Ethernet destination address. */ | |
102 | __be16 tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */ | |
103 | __be16 type; /* Ethernet frame type. */ | |
104 | } eth; | |
105 | struct { | |
106 | u8 proto; /* IP protocol or lower 8 bits of ARP opcode. */ | |
107 | u8 tos; /* IP ToS. */ | |
108 | u8 ttl; /* IP TTL/hop limit. */ | |
109 | u8 frag; /* One of OVS_FRAG_TYPE_*. */ | |
110 | } ip; | |
1139e241 JR |
111 | struct { |
112 | __be16 src; /* TCP/UDP/SCTP source port. */ | |
113 | __be16 dst; /* TCP/UDP/SCTP destination port. */ | |
114 | __be16 flags; /* TCP flags. */ | |
115 | } tp; | |
ccb1352e JG |
116 | union { |
117 | struct { | |
118 | struct { | |
119 | __be32 src; /* IP source address. */ | |
120 | __be32 dst; /* IP destination address. */ | |
121 | } addr; | |
1139e241 JR |
122 | struct { |
123 | u8 sha[ETH_ALEN]; /* ARP source hardware address. */ | |
124 | u8 tha[ETH_ALEN]; /* ARP target hardware address. */ | |
125 | } arp; | |
ccb1352e JG |
126 | } ipv4; |
127 | struct { | |
128 | struct { | |
129 | struct in6_addr src; /* IPv6 source address. */ | |
130 | struct in6_addr dst; /* IPv6 destination address. */ | |
131 | } addr; | |
132 | __be32 label; /* IPv6 flow label. */ | |
ccb1352e JG |
133 | struct { |
134 | struct in6_addr target; /* ND target address. */ | |
135 | u8 sll[ETH_ALEN]; /* ND source link layer address. */ | |
136 | u8 tll[ETH_ALEN]; /* ND target link layer address. */ | |
137 | } nd; | |
138 | } ipv6; | |
139 | }; | |
0d40f75b | 140 | } __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */ |
ccb1352e | 141 | |
e6445719 | 142 | struct sw_flow_key_range { |
8f49ce11 BP |
143 | unsigned short int start; |
144 | unsigned short int end; | |
e6445719 PS |
145 | }; |
146 | ||
147 | struct sw_flow_mask { | |
148 | int ref_count; | |
149 | struct rcu_head rcu; | |
150 | struct list_head list; | |
151 | struct sw_flow_key_range range; | |
152 | struct sw_flow_key key; | |
153 | }; | |
154 | ||
155 | struct sw_flow_match { | |
156 | struct sw_flow_key *key; | |
157 | struct sw_flow_key_range range; | |
158 | struct sw_flow_mask *mask; | |
159 | }; | |
160 | ||
161 | struct sw_flow_actions { | |
162 | struct rcu_head rcu; | |
163 | u32 actions_len; | |
164 | struct nlattr actions[]; | |
165 | }; | |
166 | ||
e298e505 PS |
167 | struct flow_stats { |
168 | u64 packet_count; /* Number of packets matched. */ | |
169 | u64 byte_count; /* Number of bytes matched. */ | |
170 | unsigned long used; /* Last used time (in jiffies). */ | |
171 | spinlock_t lock; /* Lock for atomic stats update. */ | |
172 | __be16 tcp_flags; /* Union of seen TCP flags. */ | |
173 | }; | |
174 | ||
ccb1352e JG |
175 | struct sw_flow { |
176 | struct rcu_head rcu; | |
177 | struct hlist_node hash_node[2]; | |
178 | u32 hash; | |
63e7959c JR |
179 | int stats_last_writer; /* NUMA-node id of the last writer on |
180 | * 'stats[0]'. | |
181 | */ | |
ccb1352e | 182 | struct sw_flow_key key; |
03f0d916 AZ |
183 | struct sw_flow_key unmasked_key; |
184 | struct sw_flow_mask *mask; | |
ccb1352e | 185 | struct sw_flow_actions __rcu *sf_acts; |
63e7959c JR |
186 | struct flow_stats __rcu *stats[]; /* One for each NUMA node. First one |
187 | * is allocated at flow creation time, | |
188 | * the rest are allocated on demand | |
189 | * while holding the 'stats[0].lock'. | |
190 | */ | |
ccb1352e JG |
191 | }; |
192 | ||
193 | struct arp_eth_header { | |
194 | __be16 ar_hrd; /* format of hardware address */ | |
195 | __be16 ar_pro; /* format of protocol address */ | |
196 | unsigned char ar_hln; /* length of hardware address */ | |
197 | unsigned char ar_pln; /* length of protocol address */ | |
198 | __be16 ar_op; /* ARP opcode (command) */ | |
199 | ||
200 | /* Ethernet+IPv4 specific members. */ | |
201 | unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ | |
202 | unsigned char ar_sip[4]; /* sender IP address */ | |
203 | unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ | |
204 | unsigned char ar_tip[4]; /* target IP address */ | |
205 | } __packed; | |
206 | ||
ad552007 BP |
207 | void ovs_flow_stats_update(struct sw_flow *, __be16 tcp_flags, |
208 | struct sk_buff *); | |
86ec8dba | 209 | void ovs_flow_stats_get(const struct sw_flow *, struct ovs_flow_stats *, |
e298e505 | 210 | unsigned long *used, __be16 *tcp_flags); |
86ec8dba | 211 | void ovs_flow_stats_clear(struct sw_flow *); |
ccb1352e | 212 | u64 ovs_flow_used_time(unsigned long flow_jiffies); |
ccb1352e | 213 | |
971427f3 | 214 | int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key); |
f0b128c1 JG |
215 | int ovs_flow_key_extract(struct ovs_tunnel_info *tun_info, struct sk_buff *skb, |
216 | struct sw_flow_key *key); | |
83c8df26 PS |
217 | /* Extract key from packet coming from userspace. */ |
218 | int ovs_flow_key_extract_userspace(const struct nlattr *attr, | |
219 | struct sk_buff *skb, | |
220 | struct sw_flow_key *key); | |
03f0d916 | 221 | |
ccb1352e | 222 | #endif /* flow.h */ |