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ccb1352e | 1 | /* |
9dd7f890 | 2 | * Copyright (c) 2007-2017 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> | |
c4b2bf6b | 34 | #include <linux/cpumask.h> |
ccb1352e | 35 | #include <net/inet_ecn.h> |
1d8fff90 | 36 | #include <net/ip_tunnels.h> |
34ae932a | 37 | #include <net/dst_metadata.h> |
b2d0f5d5 | 38 | #include <net/nsh.h> |
ccb1352e JG |
39 | |
40 | struct sk_buff; | |
ccb1352e | 41 | |
329f45bc JB |
42 | enum sw_flow_mac_proto { |
43 | MAC_PROTO_NONE = 0, | |
44 | MAC_PROTO_ETHERNET, | |
45 | }; | |
46 | #define SW_FLOW_KEY_INVALID 0x80 | |
47 | ||
f5796684 JG |
48 | /* Store options at the end of the array if they are less than the |
49 | * maximum size. This allows us to get the benefits of variable length | |
50 | * matching for small options. | |
51 | */ | |
d91641d9 TG |
52 | #define TUN_METADATA_OFFSET(opt_len) \ |
53 | (FIELD_SIZEOF(struct sw_flow_key, tun_opts) - opt_len) | |
54 | #define TUN_METADATA_OPTS(flow_key, opt_len) \ | |
55 | ((void *)((flow_key)->tun_opts + TUN_METADATA_OFFSET(opt_len))) | |
f5796684 | 56 | |
34ae932a TG |
57 | struct ovs_tunnel_info { |
58 | struct metadata_dst *tun_dst; | |
59 | }; | |
60 | ||
018c1dda EG |
61 | struct vlan_head { |
62 | __be16 tpid; /* Vlan type. Generally 802.1q or 802.1ad.*/ | |
9df46aef | 63 | __be16 tci; /* 0 if no VLAN, VLAN_CFI_MASK set otherwise. */ |
018c1dda EG |
64 | }; |
65 | ||
8f0aad6f WZ |
66 | #define OVS_SW_FLOW_KEY_METADATA_SIZE \ |
67 | (offsetof(struct sw_flow_key, recirc_id) + \ | |
68 | FIELD_SIZEOF(struct sw_flow_key, recirc_id)) | |
69 | ||
b2d0f5d5 YY |
70 | struct ovs_key_nsh { |
71 | struct ovs_nsh_key_base base; | |
72 | __be32 context[NSH_MD1_CONTEXT_SIZE]; | |
73 | }; | |
74 | ||
ccb1352e | 75 | struct sw_flow_key { |
fca5fdf6 | 76 | u8 tun_opts[IP_TUNNEL_OPTS_MAX]; |
f5796684 | 77 | u8 tun_opts_len; |
1d8fff90 | 78 | struct ip_tunnel_key tun_key; /* Encapsulating tunnel key. */ |
ccb1352e JG |
79 | struct { |
80 | u32 priority; /* Packet QoS priority. */ | |
39c7caeb | 81 | u32 skb_mark; /* SKB mark. */ |
15eac2a7 | 82 | u16 in_port; /* Input switch port (or DP_MAX_PORTS). */ |
1139e241 | 83 | } __packed phy; /* Safe when right after 'tun_key'. */ |
329f45bc | 84 | u8 mac_proto; /* MAC layer protocol (e.g. Ethernet). */ |
00a93bab | 85 | u8 tun_proto; /* Protocol of encapsulating tunnel. */ |
971427f3 AZ |
86 | u32 ovs_flow_hash; /* Datapath computed hash value. */ |
87 | u32 recirc_id; /* Recirculation ID. */ | |
ccb1352e JG |
88 | struct { |
89 | u8 src[ETH_ALEN]; /* Ethernet source address. */ | |
90 | u8 dst[ETH_ALEN]; /* Ethernet destination address. */ | |
018c1dda EG |
91 | struct vlan_head vlan; |
92 | struct vlan_head cvlan; | |
ccb1352e JG |
93 | __be16 type; /* Ethernet frame type. */ |
94 | } eth; | |
316d4d78 JR |
95 | /* Filling a hole of two bytes. */ |
96 | u8 ct_state; | |
97 | u8 ct_orig_proto; /* CT original direction tuple IP | |
98 | * protocol. | |
99 | */ | |
25cd9ba0 SH |
100 | union { |
101 | struct { | |
102 | __be32 top_lse; /* top label stack entry */ | |
103 | } mpls; | |
104 | struct { | |
105 | u8 proto; /* IP protocol or lower 8 bits of ARP opcode. */ | |
106 | u8 tos; /* IP ToS. */ | |
107 | u8 ttl; /* IP TTL/hop limit. */ | |
108 | u8 frag; /* One of OVS_FRAG_TYPE_*. */ | |
109 | } ip; | |
110 | }; | |
316d4d78 | 111 | u16 ct_zone; /* Conntrack zone. */ |
1139e241 JR |
112 | struct { |
113 | __be16 src; /* TCP/UDP/SCTP source port. */ | |
114 | __be16 dst; /* TCP/UDP/SCTP destination port. */ | |
115 | __be16 flags; /* TCP flags. */ | |
116 | } tp; | |
ccb1352e JG |
117 | union { |
118 | struct { | |
119 | struct { | |
120 | __be32 src; /* IP source address. */ | |
121 | __be32 dst; /* IP destination address. */ | |
122 | } addr; | |
9dd7f890 JR |
123 | union { |
124 | struct { | |
125 | __be32 src; | |
126 | __be32 dst; | |
127 | } ct_orig; /* Conntrack original direction fields. */ | |
128 | struct { | |
129 | u8 sha[ETH_ALEN]; /* ARP source hardware address. */ | |
130 | u8 tha[ETH_ALEN]; /* ARP target hardware address. */ | |
131 | } arp; | |
132 | }; | |
ccb1352e JG |
133 | } ipv4; |
134 | struct { | |
135 | struct { | |
136 | struct in6_addr src; /* IPv6 source address. */ | |
137 | struct in6_addr dst; /* IPv6 destination address. */ | |
138 | } addr; | |
139 | __be32 label; /* IPv6 flow label. */ | |
9dd7f890 JR |
140 | union { |
141 | struct { | |
142 | struct in6_addr src; | |
143 | struct in6_addr dst; | |
144 | } ct_orig; /* Conntrack original direction fields. */ | |
145 | struct { | |
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. */ | |
149 | } nd; | |
150 | }; | |
ccb1352e | 151 | } ipv6; |
b2d0f5d5 | 152 | struct ovs_key_nsh nsh; /* network service header */ |
ccb1352e | 153 | }; |
7f8a436e | 154 | struct { |
316d4d78 | 155 | /* Connection tracking fields not packed above. */ |
9dd7f890 JR |
156 | struct { |
157 | __be16 src; /* CT orig tuple tp src port. */ | |
158 | __be16 dst; /* CT orig tuple tp dst port. */ | |
159 | } orig_tp; | |
316d4d78 | 160 | u32 mark; |
33db4125 | 161 | struct ovs_key_ct_labels labels; |
7f8a436e JS |
162 | } ct; |
163 | ||
0d40f75b | 164 | } __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */ |
ccb1352e | 165 | |
9dd7f890 JR |
166 | static inline bool sw_flow_key_is_nd(const struct sw_flow_key *key) |
167 | { | |
168 | return key->eth.type == htons(ETH_P_IPV6) && | |
169 | key->ip.proto == NEXTHDR_ICMP && | |
170 | key->tp.dst == 0 && | |
171 | (key->tp.src == htons(NDISC_NEIGHBOUR_SOLICITATION) || | |
172 | key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)); | |
173 | } | |
174 | ||
e6445719 | 175 | struct sw_flow_key_range { |
8f49ce11 BP |
176 | unsigned short int start; |
177 | unsigned short int end; | |
e6445719 PS |
178 | }; |
179 | ||
180 | struct sw_flow_mask { | |
181 | int ref_count; | |
182 | struct rcu_head rcu; | |
183 | struct list_head list; | |
184 | struct sw_flow_key_range range; | |
185 | struct sw_flow_key key; | |
186 | }; | |
187 | ||
188 | struct sw_flow_match { | |
189 | struct sw_flow_key *key; | |
190 | struct sw_flow_key_range range; | |
191 | struct sw_flow_mask *mask; | |
192 | }; | |
193 | ||
74ed7ab9 JS |
194 | #define MAX_UFID_LENGTH 16 /* 128 bits */ |
195 | ||
196 | struct sw_flow_id { | |
197 | u32 ufid_len; | |
198 | union { | |
199 | u32 ufid[MAX_UFID_LENGTH / 4]; | |
200 | struct sw_flow_key *unmasked_key; | |
201 | }; | |
202 | }; | |
203 | ||
e6445719 PS |
204 | struct sw_flow_actions { |
205 | struct rcu_head rcu; | |
8e2fed1c | 206 | size_t orig_len; /* From flow_cmd_new netlink actions size */ |
e6445719 PS |
207 | u32 actions_len; |
208 | struct nlattr actions[]; | |
209 | }; | |
210 | ||
e298e505 PS |
211 | struct flow_stats { |
212 | u64 packet_count; /* Number of packets matched. */ | |
213 | u64 byte_count; /* Number of bytes matched. */ | |
214 | unsigned long used; /* Last used time (in jiffies). */ | |
215 | spinlock_t lock; /* Lock for atomic stats update. */ | |
216 | __be16 tcp_flags; /* Union of seen TCP flags. */ | |
217 | }; | |
218 | ||
ccb1352e JG |
219 | struct sw_flow { |
220 | struct rcu_head rcu; | |
74ed7ab9 JS |
221 | struct { |
222 | struct hlist_node node[2]; | |
223 | u32 hash; | |
224 | } flow_table, ufid_table; | |
db74a333 | 225 | int stats_last_writer; /* CPU id of the last writer on |
63e7959c JR |
226 | * 'stats[0]'. |
227 | */ | |
ccb1352e | 228 | struct sw_flow_key key; |
74ed7ab9 | 229 | struct sw_flow_id id; |
c4b2bf6b | 230 | struct cpumask cpu_used_mask; |
03f0d916 | 231 | struct sw_flow_mask *mask; |
ccb1352e | 232 | struct sw_flow_actions __rcu *sf_acts; |
db74a333 | 233 | struct flow_stats __rcu *stats[]; /* One for each CPU. First one |
63e7959c JR |
234 | * is allocated at flow creation time, |
235 | * the rest are allocated on demand | |
236 | * while holding the 'stats[0].lock'. | |
237 | */ | |
ccb1352e JG |
238 | }; |
239 | ||
240 | struct arp_eth_header { | |
241 | __be16 ar_hrd; /* format of hardware address */ | |
242 | __be16 ar_pro; /* format of protocol address */ | |
243 | unsigned char ar_hln; /* length of hardware address */ | |
244 | unsigned char ar_pln; /* length of protocol address */ | |
245 | __be16 ar_op; /* ARP opcode (command) */ | |
246 | ||
247 | /* Ethernet+IPv4 specific members. */ | |
248 | unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ | |
249 | unsigned char ar_sip[4]; /* sender IP address */ | |
250 | unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ | |
251 | unsigned char ar_tip[4]; /* target IP address */ | |
252 | } __packed; | |
253 | ||
329f45bc JB |
254 | static inline u8 ovs_key_mac_proto(const struct sw_flow_key *key) |
255 | { | |
256 | return key->mac_proto & ~SW_FLOW_KEY_INVALID; | |
257 | } | |
258 | ||
259 | static inline u16 __ovs_mac_header_len(u8 mac_proto) | |
260 | { | |
261 | return mac_proto == MAC_PROTO_ETHERNET ? ETH_HLEN : 0; | |
262 | } | |
263 | ||
264 | static inline u16 ovs_mac_header_len(const struct sw_flow_key *key) | |
265 | { | |
266 | return __ovs_mac_header_len(ovs_key_mac_proto(key)); | |
267 | } | |
268 | ||
74ed7ab9 JS |
269 | static inline bool ovs_identifier_is_ufid(const struct sw_flow_id *sfid) |
270 | { | |
271 | return sfid->ufid_len; | |
272 | } | |
273 | ||
274 | static inline bool ovs_identifier_is_key(const struct sw_flow_id *sfid) | |
275 | { | |
276 | return !ovs_identifier_is_ufid(sfid); | |
277 | } | |
278 | ||
ad552007 | 279 | void ovs_flow_stats_update(struct sw_flow *, __be16 tcp_flags, |
12eb18f7 | 280 | const struct sk_buff *); |
86ec8dba | 281 | void ovs_flow_stats_get(const struct sw_flow *, struct ovs_flow_stats *, |
e298e505 | 282 | unsigned long *used, __be16 *tcp_flags); |
86ec8dba | 283 | void ovs_flow_stats_clear(struct sw_flow *); |
ccb1352e | 284 | u64 ovs_flow_used_time(unsigned long flow_jiffies); |
ccb1352e | 285 | |
971427f3 | 286 | int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key); |
1d8fff90 | 287 | int ovs_flow_key_extract(const struct ip_tunnel_info *tun_info, |
12eb18f7 | 288 | struct sk_buff *skb, |
f0b128c1 | 289 | struct sw_flow_key *key); |
83c8df26 | 290 | /* Extract key from packet coming from userspace. */ |
c2ac6673 | 291 | int ovs_flow_key_extract_userspace(struct net *net, const struct nlattr *attr, |
83c8df26 | 292 | struct sk_buff *skb, |
05da5898 | 293 | struct sw_flow_key *key, bool log); |
03f0d916 | 294 | |
ccb1352e | 295 | #endif /* flow.h */ |