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ccb1352e | 1 | /* |
03f0d916 | 2 | * Copyright (c) 2007-2013 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 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/netlink.h> | |
24 | #include <linux/openvswitch.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/types.h> | |
27 | #include <linux/rcupdate.h> | |
28 | #include <linux/if_ether.h> | |
29 | #include <linux/in6.h> | |
30 | #include <linux/jiffies.h> | |
31 | #include <linux/time.h> | |
32 | #include <linux/flex_array.h> | |
33 | #include <net/inet_ecn.h> | |
34 | ||
35 | struct sk_buff; | |
03f0d916 AZ |
36 | struct sw_flow_mask; |
37 | struct flow_table; | |
ccb1352e JG |
38 | |
39 | struct sw_flow_actions { | |
40 | struct rcu_head rcu; | |
41 | u32 actions_len; | |
42 | struct nlattr actions[]; | |
43 | }; | |
44 | ||
7d5437c7 PS |
45 | /* Used to memset ovs_key_ipv4_tunnel padding. */ |
46 | #define OVS_TUNNEL_KEY_SIZE \ | |
47 | (offsetof(struct ovs_key_ipv4_tunnel, ipv4_ttl) + \ | |
48 | FIELD_SIZEOF(struct ovs_key_ipv4_tunnel, ipv4_ttl)) | |
49 | ||
50 | struct ovs_key_ipv4_tunnel { | |
51 | __be64 tun_id; | |
52 | __be32 ipv4_src; | |
53 | __be32 ipv4_dst; | |
aa310701 | 54 | __be16 tun_flags; |
7d5437c7 PS |
55 | u8 ipv4_tos; |
56 | u8 ipv4_ttl; | |
57 | }; | |
58 | ||
aa310701 PS |
59 | static inline void ovs_flow_tun_key_init(struct ovs_key_ipv4_tunnel *tun_key, |
60 | const struct iphdr *iph, __be64 tun_id, | |
61 | __be16 tun_flags) | |
62 | { | |
63 | tun_key->tun_id = tun_id; | |
64 | tun_key->ipv4_src = iph->saddr; | |
65 | tun_key->ipv4_dst = iph->daddr; | |
66 | tun_key->ipv4_tos = iph->tos; | |
67 | tun_key->ipv4_ttl = iph->ttl; | |
68 | tun_key->tun_flags = tun_flags; | |
69 | ||
70 | /* clear struct padding. */ | |
71 | memset((unsigned char *) tun_key + OVS_TUNNEL_KEY_SIZE, 0, | |
72 | sizeof(*tun_key) - OVS_TUNNEL_KEY_SIZE); | |
73 | } | |
74 | ||
ccb1352e | 75 | struct sw_flow_key { |
7d5437c7 | 76 | struct ovs_key_ipv4_tunnel tun_key; /* Encapsulating tunnel key. */ |
ccb1352e JG |
77 | struct { |
78 | u32 priority; /* Packet QoS priority. */ | |
39c7caeb | 79 | u32 skb_mark; /* SKB mark. */ |
15eac2a7 | 80 | u16 in_port; /* Input switch port (or DP_MAX_PORTS). */ |
ccb1352e JG |
81 | } phy; |
82 | struct { | |
83 | u8 src[ETH_ALEN]; /* Ethernet source address. */ | |
84 | u8 dst[ETH_ALEN]; /* Ethernet destination address. */ | |
85 | __be16 tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */ | |
86 | __be16 type; /* Ethernet frame type. */ | |
87 | } eth; | |
88 | struct { | |
89 | u8 proto; /* IP protocol or lower 8 bits of ARP opcode. */ | |
90 | u8 tos; /* IP ToS. */ | |
91 | u8 ttl; /* IP TTL/hop limit. */ | |
92 | u8 frag; /* One of OVS_FRAG_TYPE_*. */ | |
93 | } ip; | |
94 | union { | |
95 | struct { | |
96 | struct { | |
97 | __be32 src; /* IP source address. */ | |
98 | __be32 dst; /* IP destination address. */ | |
99 | } addr; | |
100 | union { | |
101 | struct { | |
a175a723 JS |
102 | __be16 src; /* TCP/UDP/SCTP source port. */ |
103 | __be16 dst; /* TCP/UDP/SCTP destination port. */ | |
ccb1352e JG |
104 | } tp; |
105 | struct { | |
106 | u8 sha[ETH_ALEN]; /* ARP source hardware address. */ | |
107 | u8 tha[ETH_ALEN]; /* ARP target hardware address. */ | |
108 | } arp; | |
109 | }; | |
110 | } ipv4; | |
111 | struct { | |
112 | struct { | |
113 | struct in6_addr src; /* IPv6 source address. */ | |
114 | struct in6_addr dst; /* IPv6 destination address. */ | |
115 | } addr; | |
116 | __be32 label; /* IPv6 flow label. */ | |
117 | struct { | |
a175a723 JS |
118 | __be16 src; /* TCP/UDP/SCTP source port. */ |
119 | __be16 dst; /* TCP/UDP/SCTP destination port. */ | |
ccb1352e JG |
120 | } tp; |
121 | struct { | |
122 | struct in6_addr target; /* ND target address. */ | |
123 | u8 sll[ETH_ALEN]; /* ND source link layer address. */ | |
124 | u8 tll[ETH_ALEN]; /* ND target link layer address. */ | |
125 | } nd; | |
126 | } ipv6; | |
127 | }; | |
5828cd9a | 128 | } __aligned(__alignof__(long)); |
ccb1352e JG |
129 | |
130 | struct sw_flow { | |
131 | struct rcu_head rcu; | |
132 | struct hlist_node hash_node[2]; | |
133 | u32 hash; | |
134 | ||
135 | struct sw_flow_key key; | |
03f0d916 AZ |
136 | struct sw_flow_key unmasked_key; |
137 | struct sw_flow_mask *mask; | |
ccb1352e JG |
138 | struct sw_flow_actions __rcu *sf_acts; |
139 | ||
140 | spinlock_t lock; /* Lock for values below. */ | |
141 | unsigned long used; /* Last used time (in jiffies). */ | |
142 | u64 packet_count; /* Number of packets matched. */ | |
143 | u64 byte_count; /* Number of bytes matched. */ | |
144 | u8 tcp_flags; /* Union of seen TCP flags. */ | |
145 | }; | |
146 | ||
03f0d916 AZ |
147 | struct sw_flow_key_range { |
148 | size_t start; | |
149 | size_t end; | |
150 | }; | |
151 | ||
03f0d916 AZ |
152 | struct sw_flow_match { |
153 | struct sw_flow_key *key; | |
154 | struct sw_flow_key_range range; | |
155 | struct sw_flow_mask *mask; | |
156 | }; | |
157 | ||
158 | void ovs_match_init(struct sw_flow_match *match, | |
159 | struct sw_flow_key *key, struct sw_flow_mask *mask); | |
160 | ||
ccb1352e JG |
161 | struct arp_eth_header { |
162 | __be16 ar_hrd; /* format of hardware address */ | |
163 | __be16 ar_pro; /* format of protocol address */ | |
164 | unsigned char ar_hln; /* length of hardware address */ | |
165 | unsigned char ar_pln; /* length of protocol address */ | |
166 | __be16 ar_op; /* ARP opcode (command) */ | |
167 | ||
168 | /* Ethernet+IPv4 specific members. */ | |
169 | unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ | |
170 | unsigned char ar_sip[4]; /* sender IP address */ | |
171 | unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ | |
172 | unsigned char ar_tip[4]; /* target IP address */ | |
173 | } __packed; | |
174 | ||
175 | int ovs_flow_init(void); | |
176 | void ovs_flow_exit(void); | |
177 | ||
178 | struct sw_flow *ovs_flow_alloc(void); | |
179 | void ovs_flow_deferred_free(struct sw_flow *); | |
03f0d916 | 180 | void ovs_flow_free(struct sw_flow *, bool deferred); |
ccb1352e | 181 | |
74f84a57 | 182 | struct sw_flow_actions *ovs_flow_actions_alloc(int actions_len); |
ccb1352e JG |
183 | void ovs_flow_deferred_free_acts(struct sw_flow_actions *); |
184 | ||
03f0d916 | 185 | int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *); |
ccb1352e JG |
186 | void ovs_flow_used(struct sw_flow *, struct sk_buff *); |
187 | u64 ovs_flow_used_time(unsigned long flow_jiffies); | |
03f0d916 AZ |
188 | int ovs_flow_to_nlattrs(const struct sw_flow_key *, |
189 | const struct sw_flow_key *, struct sk_buff *); | |
190 | int ovs_match_from_nlattrs(struct sw_flow_match *match, | |
191 | const struct nlattr *, | |
ccb1352e | 192 | const struct nlattr *); |
03f0d916 AZ |
193 | int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow, |
194 | const struct nlattr *attr); | |
ccb1352e | 195 | |
ffe3f432 | 196 | #define MAX_ACTIONS_BUFSIZE (32 * 1024) |
ccb1352e JG |
197 | #define TBL_MIN_BUCKETS 1024 |
198 | ||
199 | struct flow_table { | |
200 | struct flex_array *buckets; | |
201 | unsigned int count, n_buckets; | |
202 | struct rcu_head rcu; | |
03f0d916 | 203 | struct list_head *mask_list; |
ccb1352e JG |
204 | int node_ver; |
205 | u32 hash_seed; | |
206 | bool keep_flows; | |
207 | }; | |
208 | ||
209 | static inline int ovs_flow_tbl_count(struct flow_table *table) | |
210 | { | |
211 | return table->count; | |
212 | } | |
213 | ||
214 | static inline int ovs_flow_tbl_need_to_expand(struct flow_table *table) | |
215 | { | |
216 | return (table->count > table->n_buckets); | |
217 | } | |
218 | ||
03f0d916 AZ |
219 | struct sw_flow *ovs_flow_lookup(struct flow_table *, |
220 | const struct sw_flow_key *); | |
221 | struct sw_flow *ovs_flow_lookup_unmasked_key(struct flow_table *table, | |
222 | struct sw_flow_match *match); | |
223 | ||
224 | void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred); | |
ccb1352e JG |
225 | struct flow_table *ovs_flow_tbl_alloc(int new_size); |
226 | struct flow_table *ovs_flow_tbl_expand(struct flow_table *table); | |
227 | struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table); | |
ccb1352e | 228 | |
03f0d916 AZ |
229 | void ovs_flow_insert(struct flow_table *table, struct sw_flow *flow); |
230 | void ovs_flow_remove(struct flow_table *table, struct sw_flow *flow); | |
231 | ||
232 | struct sw_flow *ovs_flow_dump_next(struct flow_table *table, u32 *bucket, u32 *idx); | |
ccb1352e | 233 | extern const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1]; |
7d5437c7 | 234 | int ovs_ipv4_tun_from_nlattr(const struct nlattr *attr, |
03f0d916 | 235 | struct sw_flow_match *match, bool is_mask); |
7d5437c7 | 236 | int ovs_ipv4_tun_to_nlattr(struct sk_buff *skb, |
03f0d916 AZ |
237 | const struct ovs_key_ipv4_tunnel *tun_key, |
238 | const struct ovs_key_ipv4_tunnel *output); | |
239 | ||
240 | bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow, | |
02237373 | 241 | const struct sw_flow_key *key, int key_end); |
03f0d916 AZ |
242 | |
243 | struct sw_flow_mask { | |
244 | int ref_count; | |
245 | struct rcu_head rcu; | |
246 | struct list_head list; | |
247 | struct sw_flow_key_range range; | |
248 | struct sw_flow_key key; | |
249 | }; | |
250 | ||
03f0d916 AZ |
251 | struct sw_flow_mask *ovs_sw_flow_mask_alloc(void); |
252 | void ovs_sw_flow_mask_add_ref(struct sw_flow_mask *); | |
253 | void ovs_sw_flow_mask_del_ref(struct sw_flow_mask *, bool deferred); | |
254 | void ovs_sw_flow_mask_insert(struct flow_table *, struct sw_flow_mask *); | |
255 | struct sw_flow_mask *ovs_sw_flow_mask_find(const struct flow_table *, | |
256 | const struct sw_flow_mask *); | |
257 | void ovs_flow_key_mask(struct sw_flow_key *dst, const struct sw_flow_key *src, | |
258 | const struct sw_flow_mask *mask); | |
ccb1352e | 259 | #endif /* flow.h */ |