1 /* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 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
18 #include "dp-packet.h"
20 #include "meta-flow.h"
23 #include "ofproto-dpif-mirror.h"
24 #include "ofproto-dpif-rid.h"
25 #include "ofproto-dpif.h"
37 struct mcast_snooping;
41 /* Wildcards relevant in translation. Any fields that were used to
42 * calculate the action must be set for caching and kernel
43 * wildcarding to work. For example, if the flow lookup involved
44 * performing the "normal" action on IPv4 and ARP packets, 'wc'
45 * would have the 'in_port' (always set), 'dl_type' (flow match),
46 * 'vlan_tci' (normal action), and 'dl_dst' (normal action) fields
48 struct flow_wildcards wc;
50 enum slow_path_reason slow; /* 0 if fast path may be used. */
51 bool fail_open; /* Initial rule is fail open? */
52 bool has_learn; /* Actions include NXAST_LEARN? */
53 bool has_normal; /* Actions output to OFPP_NORMAL? */
54 bool has_fin_timeout; /* Actions include NXAST_FIN_TIMEOUT? */
55 ofp_port_t nf_output_iface; /* Output interface index for NetFlow. */
56 mirror_mask_t mirrors; /* Bitmap of associated mirrors. */
58 /* Recirculation IDs on which references are held. */
61 uint32_t recirc[2]; /* When n_recircs == 1 or 2 */
62 uint32_t *recircs; /* When 'n_recircs' > 2 */
65 uint64_t odp_actions_stub[256 / 8];
66 struct ofpbuf odp_actions_buf;
67 struct ofpbuf *odp_actions;
70 /* Helpers to abstract the recirculation union away. */
72 xlate_out_add_recirc(struct xlate_out *xout, uint32_t id)
74 if (OVS_LIKELY(xout->n_recircs < ARRAY_SIZE(xout->recirc))) {
75 xout->recirc[xout->n_recircs++] = id;
77 if (xout->n_recircs == ARRAY_SIZE(xout->recirc)) {
78 uint32_t *recircs = xmalloc(sizeof xout->recirc + sizeof id);
80 memcpy(recircs, xout->recirc, sizeof xout->recirc);
81 xout->recircs = recircs;
83 xout->recircs = xrealloc(xout->recircs,
84 (xout->n_recircs + 1) * sizeof id);
86 xout->recircs[xout->n_recircs++] = id;
90 static inline const uint32_t *
91 xlate_out_get_recircs(const struct xlate_out *xout)
93 if (OVS_LIKELY(xout->n_recircs <= ARRAY_SIZE(xout->recirc))) {
101 xlate_out_take_recircs(struct xlate_out *xout)
103 if (OVS_UNLIKELY(xout->n_recircs > ARRAY_SIZE(xout->recirc))) {
110 xlate_out_free_recircs(struct xlate_out *xout)
112 if (OVS_LIKELY(xout->n_recircs <= ARRAY_SIZE(xout->recirc))) {
113 for (int i = 0; i < xout->n_recircs; i++) {
114 recirc_free_id(xout->recirc[i]);
117 for (int i = 0; i < xout->n_recircs; i++) {
118 recirc_free_id(xout->recircs[i]);
125 struct ofproto_dpif *ofproto;
127 /* Flow to which the OpenFlow actions apply. xlate_actions() will modify
128 * this flow when actions change header fields. */
131 /* The packet corresponding to 'flow', or a null pointer if we are
132 * revalidating without a packet to refer to. */
133 const struct dp_packet *packet;
135 /* Should OFPP_NORMAL update the MAC learning table? Should "learn"
136 * actions update the flow table?
138 * We want to update these tables if we are actually processing a packet,
139 * or if we are accounting for packets that the datapath has processed, but
140 * not if we are just revalidating. */
143 /* If the caller of xlate_actions() doesn't need the flow_wildcards
144 * contained in struct xlate_out. 'skip_wildcards' can be set to true
145 * disabling the expensive wildcard computation. When true, 'wc' in struct
146 * xlate_out is undefined and should not be read. */
149 /* The rule initiating translation or NULL. If both 'rule' and 'ofpacts'
150 * are NULL, xlate_actions() will do the initial rule lookup itself. */
151 struct rule_dpif *rule;
153 /* The actions to translate. If 'rule' is not NULL, these may be NULL. */
154 const struct ofpact *ofpacts;
157 /* Union of the set of TCP flags seen so far in this flow. (Used only by
158 * NXAST_FIN_TIMEOUT. Set to zero to avoid updating updating rules'
162 /* If nonnull, flow translation calls this function just before executing a
163 * resubmit or OFPP_TABLE action. In addition, disables logging of traces
164 * when the recursion depth is exceeded.
166 * 'rule' is the rule being submitted into. It will be null if the
167 * resubmit or OFPP_TABLE action didn't find a matching rule.
169 * 'recurse' is the resubmit recursion depth at time of invocation.
171 * This is normally null so the client has to set it manually after
172 * calling xlate_in_init(). */
173 void (*resubmit_hook)(struct xlate_in *, struct rule_dpif *rule,
176 /* If nonnull, flow translation calls this function to report some
177 * significant decision, e.g. to explain why OFPP_NORMAL translation
178 * dropped a packet. 'recurse' is the resubmit recursion depth at time of
180 void (*report_hook)(struct xlate_in *, const char *s, int recurse);
182 /* If nonnull, flow translation credits the specified statistics to each
183 * rule reached through a resubmit or OFPP_TABLE action.
185 * This is normally null so the client has to set it manually after
186 * calling xlate_in_init(). */
187 const struct dpif_flow_stats *resubmit_stats;
189 /* If nonnull, flow translation populates this cache with references to all
190 * modules that are affected by translation. This 'xlate_cache' may be
191 * passed to xlate_push_stats() to perform the same function as
192 * xlate_actions() without the full cost of translation.
194 * This is normally null so the client has to set it manually after
195 * calling xlate_in_init(). */
196 struct xlate_cache *xcache;
198 /* Allows callers to optionally supply their own buffer for the resulting
199 * odp_actions stored in xlate_out. If NULL, the default buffer will be
201 struct ofpbuf *odp_actions;
203 /* The recirculation context related to this translation, as returned by
205 const struct recirc_id_node *recirc;
208 void xlate_ofproto_set(struct ofproto_dpif *, const char *name, struct dpif *,
209 const struct mac_learning *, struct stp *,
210 struct rstp *, const struct mcast_snooping *,
211 const struct mbridge *, const struct dpif_sflow *,
212 const struct dpif_ipfix *, const struct netflow *,
214 bool has_in_band, bool enable_recirc,
215 bool variable_length_userdata,
216 size_t mpls_label_stack_length,
217 bool masked_set_action);
218 void xlate_remove_ofproto(struct ofproto_dpif *);
220 void xlate_bundle_set(struct ofproto_dpif *, struct ofbundle *,
221 const char *name, enum port_vlan_mode, int vlan,
222 unsigned long *trunks, bool use_priority_tags,
223 const struct bond *, const struct lacp *,
225 void xlate_bundle_remove(struct ofbundle *);
227 void xlate_ofport_set(struct ofproto_dpif *, struct ofbundle *,
228 struct ofport_dpif *, ofp_port_t, odp_port_t,
229 const struct netdev *, const struct cfm *, const struct bfd *,
230 const struct lldp *, struct ofport_dpif *peer,
231 int stp_port_no, const struct rstp_port *rstp_port,
232 const struct ofproto_port_queue *qdscp,
233 size_t n_qdscp, enum ofputil_port_config,
234 enum ofputil_port_state, bool is_tunnel,
236 void xlate_ofport_remove(struct ofport_dpif *);
238 struct ofproto_dpif * xlate_lookup_ofproto(const struct dpif_backer *,
240 ofp_port_t *ofp_in_port);
241 int xlate_lookup(const struct dpif_backer *, const struct flow *,
242 struct ofproto_dpif **, struct dpif_ipfix **,
243 struct dpif_sflow **, struct netflow **,
244 ofp_port_t *ofp_in_port);
246 void xlate_actions(struct xlate_in *, struct xlate_out *);
247 void xlate_in_init(struct xlate_in *, struct ofproto_dpif *,
248 const struct flow *, ofp_port_t in_port, struct rule_dpif *,
249 uint16_t tcp_flags, const struct dp_packet *packet);
250 void xlate_out_uninit(struct xlate_out *);
251 void xlate_actions_for_side_effects(struct xlate_in *);
252 void xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src);
254 int xlate_send_packet(const struct ofport_dpif *, struct dp_packet *);
256 struct xlate_cache *xlate_cache_new(void);
257 void xlate_push_stats(struct xlate_cache *, const struct dpif_flow_stats *);
258 void xlate_cache_clear(struct xlate_cache *);
259 void xlate_cache_delete(struct xlate_cache *);
261 void xlate_txn_start(void);
262 void xlate_txn_commit(void);
264 #endif /* ofproto-dpif-xlate.h */