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a14bc59f | 1 | /* |
a5b8d49b | 2 | * Copyright (c) 2007-2014 Nicira, Inc. |
a14bc59f | 3 | * |
a9a29d22 JG |
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 | |
a14bc59f BP |
17 | */ |
18 | ||
064af421 BP |
19 | #ifndef FLOW_H |
20 | #define FLOW_H 1 | |
21 | ||
b0b906cc | 22 | #include <linux/cache.h> |
064af421 | 23 | #include <linux/kernel.h> |
78d18dbb | 24 | #include <linux/netlink.h> |
077257b8 | 25 | #include <linux/openvswitch.h> |
064af421 BP |
26 | #include <linux/spinlock.h> |
27 | #include <linux/types.h> | |
28 | #include <linux/rcupdate.h> | |
401eeb92 | 29 | #include <linux/if_ether.h> |
bfef4717 | 30 | #include <linux/in6.h> |
6bfafa55 | 31 | #include <linux/jiffies.h> |
5153ef3d | 32 | #include <linux/time.h> |
3544358a | 33 | #include <linux/flex_array.h> |
5ebaf571 | 34 | |
7257b535 | 35 | #include <net/inet_ecn.h> |
5ebaf571 | 36 | #include <net/ip_tunnels.h> |
064af421 BP |
37 | |
38 | struct sk_buff; | |
064af421 | 39 | |
fa54c2d9 PS |
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)) | |
44 | ||
9b405f1a PS |
45 | struct ovs_key_ipv4_tunnel { |
46 | __be64 tun_id; | |
47 | __be32 ipv4_src; | |
48 | __be32 ipv4_dst; | |
5ebaf571 | 49 | __be16 tun_flags; |
9b405f1a PS |
50 | u8 ipv4_tos; |
51 | u8 ipv4_ttl; | |
708fb4c5 | 52 | } __packed __aligned(4); /* Minimize padding. */ |
9b405f1a | 53 | |
adda018c PS |
54 | static inline void ovs_flow_tun_key_init(struct ovs_key_ipv4_tunnel *tun_key, |
55 | const struct iphdr *iph, __be64 tun_id, | |
56 | __be16 tun_flags) | |
57 | { | |
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; | |
64 | ||
65 | /* clear struct padding. */ | |
66 | memset((unsigned char *) tun_key + OVS_TUNNEL_KEY_SIZE, 0, | |
67 | sizeof(*tun_key) - OVS_TUNNEL_KEY_SIZE); | |
68 | } | |
69 | ||
36956a7d | 70 | struct sw_flow_key { |
6694e498 | 71 | struct ovs_key_ipv4_tunnel tun_key; /* Encapsulating tunnel key. */ |
76abe283 | 72 | struct { |
abff858b | 73 | u32 priority; /* Packet QoS priority. */ |
72e8bf28 | 74 | u32 skb_mark; /* SKB mark. */ |
95b1d73a | 75 | u16 in_port; /* Input switch port (or DP_MAX_PORTS). */ |
708fb4c5 | 76 | } __packed phy; /* Safe when right after 'tun_key'. */ |
7804df20 | 77 | u32 ovs_flow_hash; /* Datapath computed hash value. */ |
abff858b | 78 | struct { |
76abe283 AE |
79 | u8 src[ETH_ALEN]; /* Ethernet source address. */ |
80 | u8 dst[ETH_ALEN]; /* Ethernet destination address. */ | |
81 | __be16 tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */ | |
82 | __be16 type; /* Ethernet frame type. */ | |
83 | } eth; | |
84 | struct { | |
28bad473 | 85 | u8 proto; /* IP protocol or lower 8 bits of ARP opcode. */ |
3dc9baa0 | 86 | u8 tos; /* IP ToS. */ |
b1672b4c JG |
87 | u8 ttl; /* IP TTL/hop limit. */ |
88 | u8 frag; /* One of OVS_FRAG_TYPE_*. */ | |
76abe283 | 89 | } ip; |
708fb4c5 JR |
90 | struct { |
91 | __be16 src; /* TCP/UDP/SCTP source port. */ | |
92 | __be16 dst; /* TCP/UDP/SCTP destination port. */ | |
93 | __be16 flags; /* TCP flags. */ | |
94 | } tp; | |
d31f1109 JP |
95 | union { |
96 | struct { | |
76abe283 AE |
97 | struct { |
98 | __be32 src; /* IP source address. */ | |
99 | __be32 dst; /* IP destination address. */ | |
100 | } addr; | |
708fb4c5 JR |
101 | struct { |
102 | u8 sha[ETH_ALEN]; /* ARP source hardware address. */ | |
103 | u8 tha[ETH_ALEN]; /* ARP target hardware address. */ | |
104 | } arp; | |
76abe283 | 105 | } ipv4; |
d31f1109 | 106 | struct { |
76abe283 AE |
107 | struct { |
108 | struct in6_addr src; /* IPv6 source address. */ | |
109 | struct in6_addr dst; /* IPv6 destination address. */ | |
110 | } addr; | |
b1672b4c | 111 | __be32 label; /* IPv6 flow label. */ |
76abe283 AE |
112 | struct { |
113 | struct in6_addr target; /* ND target address. */ | |
114 | u8 sll[ETH_ALEN]; /* ND source link layer address. */ | |
115 | u8 tll[ETH_ALEN]; /* ND target link layer address. */ | |
116 | } nd; | |
117 | } ipv6; | |
d31f1109 | 118 | }; |
9a6fe4c1 | 119 | } __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */ |
36956a7d | 120 | |
a097c0b2 | 121 | struct sw_flow_key_range { |
8c19b83f BP |
122 | unsigned short int start; |
123 | unsigned short int end; | |
a097c0b2 PS |
124 | }; |
125 | ||
126 | struct sw_flow_mask { | |
127 | int ref_count; | |
128 | struct rcu_head rcu; | |
129 | struct list_head list; | |
130 | struct sw_flow_key_range range; | |
131 | struct sw_flow_key key; | |
132 | }; | |
133 | ||
134 | struct sw_flow_match { | |
135 | struct sw_flow_key *key; | |
136 | struct sw_flow_key_range range; | |
137 | struct sw_flow_mask *mask; | |
138 | }; | |
139 | ||
140 | struct sw_flow_actions { | |
141 | struct rcu_head rcu; | |
142 | u32 actions_len; | |
143 | struct nlattr actions[]; | |
144 | }; | |
145 | ||
b0f3a2fe | 146 | struct flow_stats { |
b0b906cc PS |
147 | u64 packet_count; /* Number of packets matched. */ |
148 | u64 byte_count; /* Number of bytes matched. */ | |
149 | unsigned long used; /* Last used time (in jiffies). */ | |
150 | spinlock_t lock; /* Lock for atomic stats update. */ | |
a66733a8 | 151 | __be16 tcp_flags; /* Union of seen TCP flags. */ |
b0f3a2fe PS |
152 | }; |
153 | ||
064af421 BP |
154 | struct sw_flow { |
155 | struct rcu_head rcu; | |
acd051f1 | 156 | struct hlist_node hash_node[2]; |
3544358a | 157 | u32 hash; |
9ac56358 JR |
158 | int stats_last_writer; /* NUMA-node id of the last writer on |
159 | * 'stats[0]'. | |
160 | */ | |
36956a7d | 161 | struct sw_flow_key key; |
a1c564be | 162 | struct sw_flow_key unmasked_key; |
3d097064 | 163 | struct sw_flow_mask *mask; |
e1040c77 | 164 | struct sw_flow_actions __rcu *sf_acts; |
9ac56358 JR |
165 | struct flow_stats __rcu *stats[]; /* One for each NUMA node. First one |
166 | * is allocated at flow creation time, | |
167 | * the rest are allocated on demand | |
168 | * while holding the 'stats[0].lock'. | |
169 | */ | |
064af421 BP |
170 | }; |
171 | ||
6455100f | 172 | struct arp_eth_header { |
401eeb92 BP |
173 | __be16 ar_hrd; /* format of hardware address */ |
174 | __be16 ar_pro; /* format of protocol address */ | |
175 | unsigned char ar_hln; /* length of hardware address */ | |
176 | unsigned char ar_pln; /* length of protocol address */ | |
177 | __be16 ar_op; /* ARP opcode (command) */ | |
178 | ||
179 | /* Ethernet+IPv4 specific members. */ | |
180 | unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ | |
181 | unsigned char ar_sip[4]; /* sender IP address */ | |
182 | unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ | |
183 | unsigned char ar_tip[4]; /* target IP address */ | |
961703de | 184 | } __packed; |
401eeb92 | 185 | |
a5b8d49b BP |
186 | void ovs_flow_stats_update(struct sw_flow *, __be16 tcp_flags, |
187 | struct sk_buff *); | |
4bb90bea | 188 | void ovs_flow_stats_get(const struct sw_flow *, struct ovs_flow_stats *, |
b0f3a2fe | 189 | unsigned long *used, __be16 *tcp_flags); |
4bb90bea | 190 | void ovs_flow_stats_clear(struct sw_flow *); |
850b6b3b | 191 | u64 ovs_flow_used_time(unsigned long flow_jiffies); |
36956a7d | 192 | |
a097c0b2 | 193 | int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *); |
a1c564be | 194 | |
064af421 | 195 | #endif /* flow.h */ |