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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 \ | |
8f0aad6f WZ |
40 | (offsetof(struct ovs_key_ipv4_tunnel, tp_dst) + \ |
41 | FIELD_SIZEOF(struct ovs_key_ipv4_tunnel, tp_dst)) | |
7d5437c7 PS |
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; | |
8f0aad6f WZ |
50 | __be16 tp_src; |
51 | __be16 tp_dst; | |
1139e241 | 52 | } __packed __aligned(4); /* Minimize padding. */ |
7d5437c7 | 53 | |
f0b128c1 JG |
54 | struct ovs_tunnel_info { |
55 | struct ovs_key_ipv4_tunnel tunnel; | |
12eb18f7 | 56 | const struct geneve_opt *options; |
f5796684 | 57 | u8 options_len; |
f0b128c1 JG |
58 | }; |
59 | ||
f5796684 JG |
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. | |
63 | */ | |
64 | #define GENEVE_OPTS(flow_key, opt_len) \ | |
65 | ((struct geneve_opt *)((flow_key)->tun_opts + \ | |
66 | FIELD_SIZEOF(struct sw_flow_key, tun_opts) - \ | |
67 | opt_len)) | |
68 | ||
8f0aad6f WZ |
69 | static inline void __ovs_flow_tun_info_init(struct ovs_tunnel_info *tun_info, |
70 | __be32 saddr, __be32 daddr, | |
71 | u8 tos, u8 ttl, | |
72 | __be16 tp_src, | |
73 | __be16 tp_dst, | |
74 | __be64 tun_id, | |
75 | __be16 tun_flags, | |
12eb18f7 | 76 | const struct geneve_opt *opts, |
8f0aad6f | 77 | u8 opts_len) |
aa310701 | 78 | { |
f0b128c1 | 79 | tun_info->tunnel.tun_id = tun_id; |
8f0aad6f WZ |
80 | tun_info->tunnel.ipv4_src = saddr; |
81 | tun_info->tunnel.ipv4_dst = daddr; | |
82 | tun_info->tunnel.ipv4_tos = tos; | |
83 | tun_info->tunnel.ipv4_ttl = ttl; | |
f0b128c1 | 84 | tun_info->tunnel.tun_flags = tun_flags; |
aa310701 | 85 | |
8f0aad6f WZ |
86 | /* For the tunnel types on the top of IPsec, the tp_src and tp_dst of |
87 | * the upper tunnel are used. | |
88 | * E.g: GRE over IPSEC, the tp_src and tp_port are zero. | |
89 | */ | |
90 | tun_info->tunnel.tp_src = tp_src; | |
91 | tun_info->tunnel.tp_dst = tp_dst; | |
92 | ||
93 | /* Clear struct padding. */ | |
94 | if (sizeof(tun_info->tunnel) != OVS_TUNNEL_KEY_SIZE) | |
95 | memset((unsigned char *)&tun_info->tunnel + OVS_TUNNEL_KEY_SIZE, | |
96 | 0, sizeof(tun_info->tunnel) - OVS_TUNNEL_KEY_SIZE); | |
f5796684 JG |
97 | |
98 | tun_info->options = opts; | |
99 | tun_info->options_len = opts_len; | |
aa310701 PS |
100 | } |
101 | ||
8f0aad6f WZ |
102 | static inline void ovs_flow_tun_info_init(struct ovs_tunnel_info *tun_info, |
103 | const struct iphdr *iph, | |
104 | __be16 tp_src, | |
105 | __be16 tp_dst, | |
106 | __be64 tun_id, | |
107 | __be16 tun_flags, | |
12eb18f7 | 108 | const struct geneve_opt *opts, |
8f0aad6f WZ |
109 | u8 opts_len) |
110 | { | |
111 | __ovs_flow_tun_info_init(tun_info, iph->saddr, iph->daddr, | |
112 | iph->tos, iph->ttl, | |
113 | tp_src, tp_dst, | |
114 | tun_id, tun_flags, | |
115 | opts, opts_len); | |
116 | } | |
117 | ||
118 | #define OVS_SW_FLOW_KEY_METADATA_SIZE \ | |
119 | (offsetof(struct sw_flow_key, recirc_id) + \ | |
120 | FIELD_SIZEOF(struct sw_flow_key, recirc_id)) | |
121 | ||
ccb1352e | 122 | struct sw_flow_key { |
f5796684 JG |
123 | u8 tun_opts[255]; |
124 | u8 tun_opts_len; | |
7d5437c7 | 125 | struct ovs_key_ipv4_tunnel tun_key; /* Encapsulating tunnel key. */ |
ccb1352e JG |
126 | struct { |
127 | u32 priority; /* Packet QoS priority. */ | |
39c7caeb | 128 | u32 skb_mark; /* SKB mark. */ |
15eac2a7 | 129 | u16 in_port; /* Input switch port (or DP_MAX_PORTS). */ |
1139e241 | 130 | } __packed phy; /* Safe when right after 'tun_key'. */ |
971427f3 AZ |
131 | u32 ovs_flow_hash; /* Datapath computed hash value. */ |
132 | u32 recirc_id; /* Recirculation ID. */ | |
ccb1352e JG |
133 | struct { |
134 | u8 src[ETH_ALEN]; /* Ethernet source address. */ | |
135 | u8 dst[ETH_ALEN]; /* Ethernet destination address. */ | |
136 | __be16 tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */ | |
137 | __be16 type; /* Ethernet frame type. */ | |
138 | } eth; | |
25cd9ba0 SH |
139 | union { |
140 | struct { | |
141 | __be32 top_lse; /* top label stack entry */ | |
142 | } mpls; | |
143 | struct { | |
144 | u8 proto; /* IP protocol or lower 8 bits of ARP opcode. */ | |
145 | u8 tos; /* IP ToS. */ | |
146 | u8 ttl; /* IP TTL/hop limit. */ | |
147 | u8 frag; /* One of OVS_FRAG_TYPE_*. */ | |
148 | } ip; | |
149 | }; | |
1139e241 JR |
150 | struct { |
151 | __be16 src; /* TCP/UDP/SCTP source port. */ | |
152 | __be16 dst; /* TCP/UDP/SCTP destination port. */ | |
153 | __be16 flags; /* TCP flags. */ | |
154 | } tp; | |
ccb1352e JG |
155 | union { |
156 | struct { | |
157 | struct { | |
158 | __be32 src; /* IP source address. */ | |
159 | __be32 dst; /* IP destination address. */ | |
160 | } addr; | |
1139e241 JR |
161 | struct { |
162 | u8 sha[ETH_ALEN]; /* ARP source hardware address. */ | |
163 | u8 tha[ETH_ALEN]; /* ARP target hardware address. */ | |
164 | } arp; | |
ccb1352e JG |
165 | } ipv4; |
166 | struct { | |
167 | struct { | |
168 | struct in6_addr src; /* IPv6 source address. */ | |
169 | struct in6_addr dst; /* IPv6 destination address. */ | |
170 | } addr; | |
171 | __be32 label; /* IPv6 flow label. */ | |
ccb1352e JG |
172 | struct { |
173 | struct in6_addr target; /* ND target address. */ | |
174 | u8 sll[ETH_ALEN]; /* ND source link layer address. */ | |
175 | u8 tll[ETH_ALEN]; /* ND target link layer address. */ | |
176 | } nd; | |
177 | } ipv6; | |
178 | }; | |
0d40f75b | 179 | } __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */ |
ccb1352e | 180 | |
e6445719 | 181 | struct sw_flow_key_range { |
8f49ce11 BP |
182 | unsigned short int start; |
183 | unsigned short int end; | |
e6445719 PS |
184 | }; |
185 | ||
186 | struct sw_flow_mask { | |
187 | int ref_count; | |
188 | struct rcu_head rcu; | |
189 | struct list_head list; | |
190 | struct sw_flow_key_range range; | |
191 | struct sw_flow_key key; | |
192 | }; | |
193 | ||
194 | struct sw_flow_match { | |
195 | struct sw_flow_key *key; | |
196 | struct sw_flow_key_range range; | |
197 | struct sw_flow_mask *mask; | |
198 | }; | |
199 | ||
200 | struct sw_flow_actions { | |
201 | struct rcu_head rcu; | |
202 | u32 actions_len; | |
203 | struct nlattr actions[]; | |
204 | }; | |
205 | ||
e298e505 PS |
206 | struct flow_stats { |
207 | u64 packet_count; /* Number of packets matched. */ | |
208 | u64 byte_count; /* Number of bytes matched. */ | |
209 | unsigned long used; /* Last used time (in jiffies). */ | |
210 | spinlock_t lock; /* Lock for atomic stats update. */ | |
211 | __be16 tcp_flags; /* Union of seen TCP flags. */ | |
212 | }; | |
213 | ||
ccb1352e JG |
214 | struct sw_flow { |
215 | struct rcu_head rcu; | |
216 | struct hlist_node hash_node[2]; | |
217 | u32 hash; | |
63e7959c JR |
218 | int stats_last_writer; /* NUMA-node id of the last writer on |
219 | * 'stats[0]'. | |
220 | */ | |
ccb1352e | 221 | struct sw_flow_key key; |
03f0d916 AZ |
222 | struct sw_flow_key unmasked_key; |
223 | struct sw_flow_mask *mask; | |
ccb1352e | 224 | struct sw_flow_actions __rcu *sf_acts; |
63e7959c JR |
225 | struct flow_stats __rcu *stats[]; /* One for each NUMA node. First one |
226 | * is allocated at flow creation time, | |
227 | * the rest are allocated on demand | |
228 | * while holding the 'stats[0].lock'. | |
229 | */ | |
ccb1352e JG |
230 | }; |
231 | ||
232 | struct arp_eth_header { | |
233 | __be16 ar_hrd; /* format of hardware address */ | |
234 | __be16 ar_pro; /* format of protocol address */ | |
235 | unsigned char ar_hln; /* length of hardware address */ | |
236 | unsigned char ar_pln; /* length of protocol address */ | |
237 | __be16 ar_op; /* ARP opcode (command) */ | |
238 | ||
239 | /* Ethernet+IPv4 specific members. */ | |
240 | unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ | |
241 | unsigned char ar_sip[4]; /* sender IP address */ | |
242 | unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ | |
243 | unsigned char ar_tip[4]; /* target IP address */ | |
244 | } __packed; | |
245 | ||
ad552007 | 246 | void ovs_flow_stats_update(struct sw_flow *, __be16 tcp_flags, |
12eb18f7 | 247 | const struct sk_buff *); |
86ec8dba | 248 | void ovs_flow_stats_get(const struct sw_flow *, struct ovs_flow_stats *, |
e298e505 | 249 | unsigned long *used, __be16 *tcp_flags); |
86ec8dba | 250 | void ovs_flow_stats_clear(struct sw_flow *); |
ccb1352e | 251 | u64 ovs_flow_used_time(unsigned long flow_jiffies); |
ccb1352e | 252 | |
971427f3 | 253 | int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key); |
12eb18f7 TG |
254 | int ovs_flow_key_extract(const struct ovs_tunnel_info *tun_info, |
255 | struct sk_buff *skb, | |
f0b128c1 | 256 | struct sw_flow_key *key); |
83c8df26 PS |
257 | /* Extract key from packet coming from userspace. */ |
258 | int ovs_flow_key_extract_userspace(const struct nlattr *attr, | |
259 | struct sk_buff *skb, | |
05da5898 | 260 | struct sw_flow_key *key, bool log); |
03f0d916 | 261 | |
ccb1352e | 262 | #endif /* flow.h */ |