1 /* Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License. */
15 #ifndef OFPROTO_DPIF_XLATE_H
16 #define OFPROTO_DPIF_XLATE_H 1
19 #include "meta-flow.h"
22 #include "ofproto-dpif-mirror.h"
23 #include "ofproto-dpif.h"
37 uint32_t recirc_id; /* !0 Use recirculation instead of output. */
38 uint8_t hash_alg; /* !0 Compute hash for recirc before. */
39 uint32_t hash_basis; /* Compute hash for recirc before. */
43 /* Wildcards relevant in translation. Any fields that were used to
44 * calculate the action must be set for caching and kernel
45 * wildcarding to work. For example, if the flow lookup involved
46 * performing the "normal" action on IPv4 and ARP packets, 'wc'
47 * would have the 'in_port' (always set), 'dl_type' (flow match),
48 * 'vlan_tci' (normal action), and 'dl_dst' (normal action) fields
50 struct flow_wildcards wc;
52 enum slow_path_reason slow; /* 0 if fast path may be used. */
53 bool fail_open; /* Initial rule is fail open? */
54 bool has_learn; /* Actions include NXAST_LEARN? */
55 bool has_normal; /* Actions output to OFPP_NORMAL? */
56 bool has_fin_timeout; /* Actions include NXAST_FIN_TIMEOUT? */
57 ofp_port_t nf_output_iface; /* Output interface index for NetFlow. */
58 mirror_mask_t mirrors; /* Bitmap of associated mirrors. */
60 uint64_t odp_actions_stub[256 / 8];
61 struct ofpbuf odp_actions;
65 struct ofproto_dpif *ofproto;
67 /* Flow to which the OpenFlow actions apply. xlate_actions() will modify
68 * this flow when actions change header fields. */
71 /* The packet corresponding to 'flow', or a null pointer if we are
72 * revalidating without a packet to refer to. */
73 const struct ofpbuf *packet;
75 /* Should OFPP_NORMAL update the MAC learning table? Should "learn"
76 * actions update the flow table?
78 * We want to update these tables if we are actually processing a packet,
79 * or if we are accounting for packets that the datapath has processed, but
80 * not if we are just revalidating. */
83 /* If the caller of xlate_actions() doesn't need the flow_wildcards
84 * contained in struct xlate_out. 'skip_wildcards' can be set to true
85 * disabling the expensive wildcard computation. When true, 'wc' in struct
86 * xlate_out is undefined and should not be read. */
89 /* The rule initiating translation or NULL. If both 'rule' and 'ofpacts'
90 * are NULL, xlate_actions() will do the initial rule lookup itself. */
91 struct rule_dpif *rule;
93 /* The actions to translate. If 'rule' is not NULL, these may be NULL. */
94 const struct ofpact *ofpacts;
97 /* Union of the set of TCP flags seen so far in this flow. (Used only by
98 * NXAST_FIN_TIMEOUT. Set to zero to avoid updating updating rules'
102 /* If nonnull, flow translation calls this function just before executing a
103 * resubmit or OFPP_TABLE action. In addition, disables logging of traces
104 * when the recursion depth is exceeded.
106 * 'rule' is the rule being submitted into. It will be null if the
107 * resubmit or OFPP_TABLE action didn't find a matching rule.
109 * 'recurse' is the resubmit recursion depth at time of invocation.
111 * This is normally null so the client has to set it manually after
112 * calling xlate_in_init(). */
113 void (*resubmit_hook)(struct xlate_in *, struct rule_dpif *rule,
116 /* If nonnull, flow translation calls this function to report some
117 * significant decision, e.g. to explain why OFPP_NORMAL translation
118 * dropped a packet. 'recurse' is the resubmit recursion depth at time of
120 void (*report_hook)(struct xlate_in *, const char *s, int recurse);
122 /* If nonnull, flow translation credits the specified statistics to each
123 * rule reached through a resubmit or OFPP_TABLE action.
125 * This is normally null so the client has to set it manually after
126 * calling xlate_in_init(). */
127 const struct dpif_flow_stats *resubmit_stats;
129 /* If nonnull, flow translation populates this cache with references to all
130 * modules that are affected by translation. This 'xlate_cache' may be
131 * passed to xlate_push_stats() to perform the same function as
132 * xlate_actions() without the full cost of translation.
134 * This is normally null so the client has to set it manually after
135 * calling xlate_in_init(). */
136 struct xlate_cache *xcache;
139 extern struct ovs_rwlock xlate_rwlock;
141 void xlate_ofproto_set(struct ofproto_dpif *, const char *name,
142 struct dpif *, struct rule_dpif *miss_rule,
143 struct rule_dpif *no_packet_in_rule,
144 const struct mac_learning *, struct stp *,
145 const struct mbridge *, const struct dpif_sflow *,
146 const struct dpif_ipfix *, const struct netflow *,
147 enum ofp_config_flags, bool forward_bpdu,
148 bool has_in_band, bool enable_recirc,
149 bool variable_length_userdata,
150 size_t mpls_label_stack_length)
151 OVS_REQ_WRLOCK(xlate_rwlock);
152 void xlate_remove_ofproto(struct ofproto_dpif *) OVS_REQ_WRLOCK(xlate_rwlock);
154 void xlate_bundle_set(struct ofproto_dpif *, struct ofbundle *,
155 const char *name, enum port_vlan_mode, int vlan,
156 unsigned long *trunks, bool use_priority_tags,
157 const struct bond *, const struct lacp *,
158 bool floodable) OVS_REQ_WRLOCK(xlate_rwlock);
159 void xlate_bundle_remove(struct ofbundle *) OVS_REQ_WRLOCK(xlate_rwlock);
161 void xlate_ofport_set(struct ofproto_dpif *, struct ofbundle *,
162 struct ofport_dpif *, ofp_port_t, odp_port_t,
163 const struct netdev *, const struct cfm *,
164 const struct bfd *, struct ofport_dpif *peer,
165 int stp_port_no, const struct ofproto_port_queue *qdscp,
166 size_t n_qdscp, enum ofputil_port_config,
167 enum ofputil_port_state, bool is_tunnel,
168 bool may_enable) OVS_REQ_WRLOCK(xlate_rwlock);
169 void xlate_ofport_remove(struct ofport_dpif *) OVS_REQ_WRLOCK(xlate_rwlock);
171 int xlate_receive(const struct dpif_backer *, struct ofpbuf *packet,
172 const struct nlattr *key, size_t key_len,
173 struct flow *, struct ofproto_dpif **, struct dpif_ipfix **,
174 struct dpif_sflow **, struct netflow **,
175 odp_port_t *odp_in_port)
176 OVS_EXCLUDED(xlate_rwlock);
178 void xlate_actions(struct xlate_in *, struct xlate_out *)
179 OVS_EXCLUDED(xlate_rwlock);
180 void xlate_in_init(struct xlate_in *, struct ofproto_dpif *,
181 const struct flow *, struct rule_dpif *,
182 uint16_t tcp_flags, const struct ofpbuf *packet);
183 void xlate_out_uninit(struct xlate_out *);
184 void xlate_actions_for_side_effects(struct xlate_in *);
185 void xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src);
187 int xlate_send_packet(const struct ofport_dpif *, struct ofpbuf *);
189 struct xlate_cache *xlate_cache_new(void);
190 void xlate_push_stats(struct xlate_cache *, bool may_learn,
191 const struct dpif_flow_stats *);
192 void xlate_cache_clear(struct xlate_cache *);
193 void xlate_cache_delete(struct xlate_cache *);
195 #endif /* ofproto-dpif-xlate.h */