Commit | Line | Data |
---|---|---|
ccb1352e | 1 | /* |
caf2ee14 | 2 | * Copyright (c) 2007-2011 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; | |
36 | ||
37 | struct sw_flow_actions { | |
38 | struct rcu_head rcu; | |
39 | u32 actions_len; | |
40 | struct nlattr actions[]; | |
41 | }; | |
42 | ||
43 | struct sw_flow_key { | |
44 | struct { | |
45 | u32 priority; /* Packet QoS priority. */ | |
39c7caeb | 46 | u32 skb_mark; /* SKB mark. */ |
15eac2a7 | 47 | u16 in_port; /* Input switch port (or DP_MAX_PORTS). */ |
ccb1352e JG |
48 | } phy; |
49 | struct { | |
50 | u8 src[ETH_ALEN]; /* Ethernet source address. */ | |
51 | u8 dst[ETH_ALEN]; /* Ethernet destination address. */ | |
52 | __be16 tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */ | |
53 | __be16 type; /* Ethernet frame type. */ | |
54 | } eth; | |
55 | struct { | |
56 | u8 proto; /* IP protocol or lower 8 bits of ARP opcode. */ | |
57 | u8 tos; /* IP ToS. */ | |
58 | u8 ttl; /* IP TTL/hop limit. */ | |
59 | u8 frag; /* One of OVS_FRAG_TYPE_*. */ | |
60 | } ip; | |
61 | union { | |
62 | struct { | |
63 | struct { | |
64 | __be32 src; /* IP source address. */ | |
65 | __be32 dst; /* IP destination address. */ | |
66 | } addr; | |
67 | union { | |
68 | struct { | |
69 | __be16 src; /* TCP/UDP source port. */ | |
70 | __be16 dst; /* TCP/UDP destination port. */ | |
71 | } tp; | |
72 | struct { | |
73 | u8 sha[ETH_ALEN]; /* ARP source hardware address. */ | |
74 | u8 tha[ETH_ALEN]; /* ARP target hardware address. */ | |
75 | } arp; | |
76 | }; | |
77 | } ipv4; | |
78 | struct { | |
79 | struct { | |
80 | struct in6_addr src; /* IPv6 source address. */ | |
81 | struct in6_addr dst; /* IPv6 destination address. */ | |
82 | } addr; | |
83 | __be32 label; /* IPv6 flow label. */ | |
84 | struct { | |
85 | __be16 src; /* TCP/UDP source port. */ | |
86 | __be16 dst; /* TCP/UDP destination port. */ | |
87 | } tp; | |
88 | struct { | |
89 | struct in6_addr target; /* ND target address. */ | |
90 | u8 sll[ETH_ALEN]; /* ND source link layer address. */ | |
91 | u8 tll[ETH_ALEN]; /* ND target link layer address. */ | |
92 | } nd; | |
93 | } ipv6; | |
94 | }; | |
95 | }; | |
96 | ||
97 | struct sw_flow { | |
98 | struct rcu_head rcu; | |
99 | struct hlist_node hash_node[2]; | |
100 | u32 hash; | |
101 | ||
102 | struct sw_flow_key key; | |
103 | struct sw_flow_actions __rcu *sf_acts; | |
104 | ||
105 | spinlock_t lock; /* Lock for values below. */ | |
106 | unsigned long used; /* Last used time (in jiffies). */ | |
107 | u64 packet_count; /* Number of packets matched. */ | |
108 | u64 byte_count; /* Number of bytes matched. */ | |
109 | u8 tcp_flags; /* Union of seen TCP flags. */ | |
110 | }; | |
111 | ||
112 | struct arp_eth_header { | |
113 | __be16 ar_hrd; /* format of hardware address */ | |
114 | __be16 ar_pro; /* format of protocol address */ | |
115 | unsigned char ar_hln; /* length of hardware address */ | |
116 | unsigned char ar_pln; /* length of protocol address */ | |
117 | __be16 ar_op; /* ARP opcode (command) */ | |
118 | ||
119 | /* Ethernet+IPv4 specific members. */ | |
120 | unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */ | |
121 | unsigned char ar_sip[4]; /* sender IP address */ | |
122 | unsigned char ar_tha[ETH_ALEN]; /* target hardware address */ | |
123 | unsigned char ar_tip[4]; /* target IP address */ | |
124 | } __packed; | |
125 | ||
126 | int ovs_flow_init(void); | |
127 | void ovs_flow_exit(void); | |
128 | ||
129 | struct sw_flow *ovs_flow_alloc(void); | |
130 | void ovs_flow_deferred_free(struct sw_flow *); | |
131 | void ovs_flow_free(struct sw_flow *flow); | |
132 | ||
133 | struct sw_flow_actions *ovs_flow_actions_alloc(const struct nlattr *); | |
134 | void ovs_flow_deferred_free_acts(struct sw_flow_actions *); | |
135 | ||
136 | int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *, | |
137 | int *key_lenp); | |
138 | void ovs_flow_used(struct sw_flow *, struct sk_buff *); | |
139 | u64 ovs_flow_used_time(unsigned long flow_jiffies); | |
140 | ||
141 | /* Upper bound on the length of a nlattr-formatted flow key. The longest | |
142 | * nlattr-formatted flow key would be: | |
143 | * | |
144 | * struct pad nl hdr total | |
145 | * ------ --- ------ ----- | |
146 | * OVS_KEY_ATTR_PRIORITY 4 -- 4 8 | |
147 | * OVS_KEY_ATTR_IN_PORT 4 -- 4 8 | |
39c7caeb | 148 | * OVS_KEY_ATTR_SKB_MARK 4 -- 4 8 |
ccb1352e | 149 | * OVS_KEY_ATTR_ETHERNET 12 -- 4 16 |
c303aa94 | 150 | * OVS_KEY_ATTR_ETHERTYPE 2 2 4 8 (outer VLAN ethertype) |
ccb1352e | 151 | * OVS_KEY_ATTR_8021Q 4 -- 4 8 |
c303aa94 JG |
152 | * OVS_KEY_ATTR_ENCAP 0 -- 4 4 (VLAN encapsulation) |
153 | * OVS_KEY_ATTR_ETHERTYPE 2 2 4 8 (inner VLAN ethertype) | |
ccb1352e JG |
154 | * OVS_KEY_ATTR_IPV6 40 -- 4 44 |
155 | * OVS_KEY_ATTR_ICMPV6 2 2 4 8 | |
156 | * OVS_KEY_ATTR_ND 28 -- 4 32 | |
157 | * ------------------------------------------------- | |
39c7caeb | 158 | * total 152 |
ccb1352e | 159 | */ |
39c7caeb | 160 | #define FLOW_BUFSIZE 152 |
ccb1352e JG |
161 | |
162 | int ovs_flow_to_nlattrs(const struct sw_flow_key *, struct sk_buff *); | |
163 | int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp, | |
164 | const struct nlattr *); | |
39c7caeb | 165 | int ovs_flow_metadata_from_nlattrs(u32 *priority, u32 *mark, u16 *in_port, |
ccb1352e JG |
166 | const struct nlattr *); |
167 | ||
15eac2a7 | 168 | #define MAX_ACTIONS_BUFSIZE (16 * 1024) |
ccb1352e JG |
169 | #define TBL_MIN_BUCKETS 1024 |
170 | ||
171 | struct flow_table { | |
172 | struct flex_array *buckets; | |
173 | unsigned int count, n_buckets; | |
174 | struct rcu_head rcu; | |
175 | int node_ver; | |
176 | u32 hash_seed; | |
177 | bool keep_flows; | |
178 | }; | |
179 | ||
180 | static inline int ovs_flow_tbl_count(struct flow_table *table) | |
181 | { | |
182 | return table->count; | |
183 | } | |
184 | ||
185 | static inline int ovs_flow_tbl_need_to_expand(struct flow_table *table) | |
186 | { | |
187 | return (table->count > table->n_buckets); | |
188 | } | |
189 | ||
190 | struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *table, | |
191 | struct sw_flow_key *key, int len); | |
192 | void ovs_flow_tbl_destroy(struct flow_table *table); | |
193 | void ovs_flow_tbl_deferred_destroy(struct flow_table *table); | |
194 | struct flow_table *ovs_flow_tbl_alloc(int new_size); | |
195 | struct flow_table *ovs_flow_tbl_expand(struct flow_table *table); | |
196 | struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table); | |
197 | void ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow); | |
198 | void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow); | |
199 | u32 ovs_flow_hash(const struct sw_flow_key *key, int key_len); | |
200 | ||
201 | struct sw_flow *ovs_flow_tbl_next(struct flow_table *table, u32 *bucket, u32 *idx); | |
202 | extern const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1]; | |
203 | ||
204 | #endif /* flow.h */ |