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. */
17 #include "ofproto/ofproto-dpif-xlate.h"
25 #include "byte-order.h"
30 #include "dynamic-string.h"
35 #include "mac-learning.h"
36 #include "meta-flow.h"
37 #include "multipath.h"
38 #include "netdev-vport.h"
41 #include "odp-execute.h"
42 #include "ofp-actions.h"
43 #include "ofproto/ofproto-dpif-ipfix.h"
44 #include "ofproto/ofproto-dpif-mirror.h"
45 #include "ofproto/ofproto-dpif-sflow.h"
46 #include "ofproto/ofproto-dpif.h"
47 #include "ofproto/ofproto-provider.h"
51 COVERAGE_DEFINE(xlate_actions);
52 COVERAGE_DEFINE(xlate_actions_oversize);
54 VLOG_DEFINE_THIS_MODULE(ofproto_dpif_xlate);
56 /* Maximum depth of flow table recursion (due to resubmit actions) in a
57 * flow translation. */
58 #define MAX_RESUBMIT_RECURSION 64
60 /* Maximum number of resubmit actions in a flow translation, whether they are
61 * recursive or not. */
62 #define MAX_RESUBMITS (MAX_RESUBMIT_RECURSION * MAX_RESUBMIT_RECURSION)
64 struct ovs_rwlock xlate_rwlock = OVS_RWLOCK_INITIALIZER;
67 struct hmap_node hmap_node; /* Node in global 'xbridges' map. */
68 struct ofproto_dpif *ofproto; /* Key in global 'xbridges' map. */
70 struct list xbundles; /* Owned xbundles. */
71 struct hmap xports; /* Indexed by ofp_port. */
73 char *name; /* Name used in log messages. */
74 struct dpif *dpif; /* Datapath interface. */
75 struct mac_learning *ml; /* Mac learning handle. */
76 struct mbridge *mbridge; /* Mirroring. */
77 struct dpif_sflow *sflow; /* SFlow handle, or null. */
78 struct dpif_ipfix *ipfix; /* Ipfix handle, or null. */
79 struct stp *stp; /* STP or null if disabled. */
81 /* Special rules installed by ofproto-dpif. */
82 struct rule_dpif *miss_rule;
83 struct rule_dpif *no_packet_in_rule;
85 enum ofp_config_flags frag; /* Fragmentation handling. */
86 bool has_netflow; /* Bridge runs netflow? */
87 bool has_in_band; /* Bridge has in band control? */
88 bool forward_bpdu; /* Bridge forwards STP BPDUs? */
92 struct hmap_node hmap_node; /* In global 'xbundles' map. */
93 struct ofbundle *ofbundle; /* Key in global 'xbundles' map. */
95 struct list list_node; /* In parent 'xbridges' list. */
96 struct xbridge *xbridge; /* Parent xbridge. */
98 struct list xports; /* Contains "struct xport"s. */
100 char *name; /* Name used in log messages. */
101 struct bond *bond; /* Nonnull iff more than one port. */
102 struct lacp *lacp; /* LACP handle or null. */
104 enum port_vlan_mode vlan_mode; /* VLAN mode. */
105 int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */
106 unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1.
107 * NULL if all VLANs are trunked. */
108 bool use_priority_tags; /* Use 802.1p tag for frames in VLAN 0? */
109 bool floodable; /* No port has OFPUTIL_PC_NO_FLOOD set? */
113 struct hmap_node hmap_node; /* Node in global 'xports' map. */
114 struct ofport_dpif *ofport; /* Key in global 'xports map. */
116 struct hmap_node ofp_node; /* Node in parent xbridge 'xports' map. */
117 ofp_port_t ofp_port; /* Key in parent xbridge 'xports' map. */
119 odp_port_t odp_port; /* Datapath port number or ODPP_NONE. */
121 struct list bundle_node; /* In parent xbundle (if it exists). */
122 struct xbundle *xbundle; /* Parent xbundle or null. */
124 struct netdev *netdev; /* 'ofport''s netdev. */
126 struct xbridge *xbridge; /* Parent bridge. */
127 struct xport *peer; /* Patch port peer or null. */
129 enum ofputil_port_config config; /* OpenFlow port configuration. */
130 int stp_port_no; /* STP port number or -1 if not in use. */
132 struct hmap skb_priorities; /* Map of 'skb_priority_to_dscp's. */
134 bool may_enable; /* May be enabled in bonds. */
135 bool is_tunnel; /* Is a tunnel port. */
137 struct cfm *cfm; /* CFM handle or null. */
138 struct bfd *bfd; /* BFD handle or null. */
142 struct xlate_in *xin;
143 struct xlate_out *xout;
145 const struct xbridge *xbridge;
147 /* Flow at the last commit. */
148 struct flow base_flow;
150 /* Tunnel IP destination address as received. This is stored separately
151 * as the base_flow.tunnel is cleared on init to reflect the datapath
152 * behavior. Used to make sure not to send tunneled output to ourselves,
153 * which might lead to an infinite loop. This could happen easily
154 * if a tunnel is marked as 'ip_remote=flow', and the flow does not
155 * actually set the tun_dst field. */
156 ovs_be32 orig_tunnel_ip_dst;
158 /* Stack for the push and pop actions. Each stack element is of type
159 * "union mf_subvalue". */
160 union mf_subvalue init_stack[1024 / sizeof(union mf_subvalue)];
163 /* The rule that we are currently translating, or NULL. */
164 struct rule_dpif *rule;
166 int mpls_depth_delta; /* Delta of the mpls stack depth since
167 * actions were last committed.
168 * Must be between -1 and 1 inclusive. */
169 ovs_be32 pre_push_mpls_lse; /* Used to record the top-most MPLS LSE
170 * prior to an mpls_push so that it may be
171 * used for a subsequent mpls_pop. */
173 /* Resubmit statistics, via xlate_table_action(). */
174 int recurse; /* Current resubmit nesting depth. */
175 int resubmits; /* Total number of resubmits. */
177 uint32_t orig_skb_priority; /* Priority when packet arrived. */
178 uint8_t table_id; /* OpenFlow table ID where flow was found. */
179 uint32_t sflow_n_outputs; /* Number of output ports. */
180 odp_port_t sflow_odp_port; /* Output port for composing sFlow action. */
181 uint16_t user_cookie_offset;/* Used for user_action_cookie fixup. */
182 bool exit; /* No further actions should be processed. */
184 /* OpenFlow 1.1+ action set.
186 * 'action_set' accumulates "struct ofpact"s added by OFPACT_WRITE_ACTIONS.
187 * When translation is otherwise complete, ofpacts_execute_action_set()
188 * converts it to a set of "struct ofpact"s that can be translated into
189 * datapath actions. */
190 struct ofpbuf action_set; /* Action set. */
191 uint64_t action_set_stub[1024 / 8];
194 /* A controller may use OFPP_NONE as the ingress port to indicate that
195 * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for
196 * when an input bundle is needed for validation (e.g., mirroring or
197 * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have
198 * any 'port' structs, so care must be taken when dealing with it.
199 * The bundle's name and vlan mode are initialized in lookup_input_bundle() */
200 static struct xbundle ofpp_none_bundle;
202 /* Node in 'xport''s 'skb_priorities' map. Used to maintain a map from
203 * 'priority' (the datapath's term for QoS queue) to the dscp bits which all
204 * traffic egressing the 'ofport' with that priority should be marked with. */
205 struct skb_priority_to_dscp {
206 struct hmap_node hmap_node; /* Node in 'ofport_dpif''s 'skb_priorities'. */
207 uint32_t skb_priority; /* Priority of this queue (see struct flow). */
209 uint8_t dscp; /* DSCP bits to mark outgoing traffic with. */
212 static struct hmap xbridges = HMAP_INITIALIZER(&xbridges);
213 static struct hmap xbundles = HMAP_INITIALIZER(&xbundles);
214 static struct hmap xports = HMAP_INITIALIZER(&xports);
216 static bool may_receive(const struct xport *, struct xlate_ctx *);
217 static void do_xlate_actions(const struct ofpact *, size_t ofpacts_len,
219 static void xlate_actions__(struct xlate_in *, struct xlate_out *)
220 OVS_REQ_RDLOCK(xlate_rwlock);
221 static void xlate_normal(struct xlate_ctx *);
222 static void xlate_report(struct xlate_ctx *, const char *);
223 static void xlate_table_action(struct xlate_ctx *, ofp_port_t in_port,
224 uint8_t table_id, bool may_packet_in);
225 static bool input_vid_is_valid(uint16_t vid, struct xbundle *, bool warn);
226 static uint16_t input_vid_to_vlan(const struct xbundle *, uint16_t vid);
227 static void output_normal(struct xlate_ctx *, const struct xbundle *,
229 static void compose_output_action(struct xlate_ctx *, ofp_port_t ofp_port);
231 static struct xbridge *xbridge_lookup(const struct ofproto_dpif *);
232 static struct xbundle *xbundle_lookup(const struct ofbundle *);
233 static struct xport *xport_lookup(const struct ofport_dpif *);
234 static struct xport *get_ofp_port(const struct xbridge *, ofp_port_t ofp_port);
235 static struct skb_priority_to_dscp *get_skb_priority(const struct xport *,
236 uint32_t skb_priority);
237 static void clear_skb_priorities(struct xport *);
238 static bool dscp_from_skb_priority(const struct xport *, uint32_t skb_priority,
242 xlate_ofproto_set(struct ofproto_dpif *ofproto, const char *name,
243 struct dpif *dpif, struct rule_dpif *miss_rule,
244 struct rule_dpif *no_packet_in_rule,
245 const struct mac_learning *ml, struct stp *stp,
246 const struct mbridge *mbridge,
247 const struct dpif_sflow *sflow,
248 const struct dpif_ipfix *ipfix, enum ofp_config_flags frag,
249 bool forward_bpdu, bool has_in_band, bool has_netflow)
251 struct xbridge *xbridge = xbridge_lookup(ofproto);
254 xbridge = xzalloc(sizeof *xbridge);
255 xbridge->ofproto = ofproto;
257 hmap_insert(&xbridges, &xbridge->hmap_node, hash_pointer(ofproto, 0));
258 hmap_init(&xbridge->xports);
259 list_init(&xbridge->xbundles);
262 if (xbridge->ml != ml) {
263 mac_learning_unref(xbridge->ml);
264 xbridge->ml = mac_learning_ref(ml);
267 if (xbridge->mbridge != mbridge) {
268 mbridge_unref(xbridge->mbridge);
269 xbridge->mbridge = mbridge_ref(mbridge);
272 if (xbridge->sflow != sflow) {
273 dpif_sflow_unref(xbridge->sflow);
274 xbridge->sflow = dpif_sflow_ref(sflow);
277 if (xbridge->ipfix != ipfix) {
278 dpif_ipfix_unref(xbridge->ipfix);
279 xbridge->ipfix = dpif_ipfix_ref(ipfix);
282 if (xbridge->stp != stp) {
283 stp_unref(xbridge->stp);
284 xbridge->stp = stp_ref(stp);
288 xbridge->name = xstrdup(name);
290 xbridge->dpif = dpif;
291 xbridge->forward_bpdu = forward_bpdu;
292 xbridge->has_in_band = has_in_band;
293 xbridge->has_netflow = has_netflow;
294 xbridge->frag = frag;
295 xbridge->miss_rule = miss_rule;
296 xbridge->no_packet_in_rule = no_packet_in_rule;
300 xlate_remove_ofproto(struct ofproto_dpif *ofproto)
302 struct xbridge *xbridge = xbridge_lookup(ofproto);
303 struct xbundle *xbundle, *next_xbundle;
304 struct xport *xport, *next_xport;
310 HMAP_FOR_EACH_SAFE (xport, next_xport, ofp_node, &xbridge->xports) {
311 xlate_ofport_remove(xport->ofport);
314 LIST_FOR_EACH_SAFE (xbundle, next_xbundle, list_node, &xbridge->xbundles) {
315 xlate_bundle_remove(xbundle->ofbundle);
318 hmap_remove(&xbridges, &xbridge->hmap_node);
319 mac_learning_unref(xbridge->ml);
320 mbridge_unref(xbridge->mbridge);
321 dpif_sflow_unref(xbridge->sflow);
322 dpif_ipfix_unref(xbridge->ipfix);
323 stp_unref(xbridge->stp);
324 hmap_destroy(&xbridge->xports);
330 xlate_bundle_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
331 const char *name, enum port_vlan_mode vlan_mode, int vlan,
332 unsigned long *trunks, bool use_priority_tags,
333 const struct bond *bond, const struct lacp *lacp,
336 struct xbundle *xbundle = xbundle_lookup(ofbundle);
339 xbundle = xzalloc(sizeof *xbundle);
340 xbundle->ofbundle = ofbundle;
341 xbundle->xbridge = xbridge_lookup(ofproto);
343 hmap_insert(&xbundles, &xbundle->hmap_node, hash_pointer(ofbundle, 0));
344 list_insert(&xbundle->xbridge->xbundles, &xbundle->list_node);
345 list_init(&xbundle->xports);
348 ovs_assert(xbundle->xbridge);
351 xbundle->name = xstrdup(name);
353 xbundle->vlan_mode = vlan_mode;
354 xbundle->vlan = vlan;
355 xbundle->trunks = trunks;
356 xbundle->use_priority_tags = use_priority_tags;
357 xbundle->floodable = floodable;
359 if (xbundle->bond != bond) {
360 bond_unref(xbundle->bond);
361 xbundle->bond = bond_ref(bond);
364 if (xbundle->lacp != lacp) {
365 lacp_unref(xbundle->lacp);
366 xbundle->lacp = lacp_ref(lacp);
371 xlate_bundle_remove(struct ofbundle *ofbundle)
373 struct xbundle *xbundle = xbundle_lookup(ofbundle);
374 struct xport *xport, *next;
380 LIST_FOR_EACH_SAFE (xport, next, bundle_node, &xbundle->xports) {
381 list_remove(&xport->bundle_node);
382 xport->xbundle = NULL;
385 hmap_remove(&xbundles, &xbundle->hmap_node);
386 list_remove(&xbundle->list_node);
387 bond_unref(xbundle->bond);
388 lacp_unref(xbundle->lacp);
394 xlate_ofport_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
395 struct ofport_dpif *ofport, ofp_port_t ofp_port,
396 odp_port_t odp_port, const struct netdev *netdev,
397 const struct cfm *cfm, const struct bfd *bfd,
398 struct ofport_dpif *peer, int stp_port_no,
399 const struct ofproto_port_queue *qdscp_list, size_t n_qdscp,
400 enum ofputil_port_config config, bool is_tunnel,
403 struct xport *xport = xport_lookup(ofport);
407 xport = xzalloc(sizeof *xport);
408 xport->ofport = ofport;
409 xport->xbridge = xbridge_lookup(ofproto);
410 xport->ofp_port = ofp_port;
412 hmap_init(&xport->skb_priorities);
413 hmap_insert(&xports, &xport->hmap_node, hash_pointer(ofport, 0));
414 hmap_insert(&xport->xbridge->xports, &xport->ofp_node,
415 hash_ofp_port(xport->ofp_port));
418 ovs_assert(xport->ofp_port == ofp_port);
420 xport->config = config;
421 xport->stp_port_no = stp_port_no;
422 xport->is_tunnel = is_tunnel;
423 xport->may_enable = may_enable;
424 xport->odp_port = odp_port;
426 if (xport->netdev != netdev) {
427 netdev_close(xport->netdev);
428 xport->netdev = netdev_ref(netdev);
431 if (xport->cfm != cfm) {
432 cfm_unref(xport->cfm);
433 xport->cfm = cfm_ref(cfm);
436 if (xport->bfd != bfd) {
437 bfd_unref(xport->bfd);
438 xport->bfd = bfd_ref(bfd);
442 xport->peer->peer = NULL;
444 xport->peer = xport_lookup(peer);
446 xport->peer->peer = xport;
449 if (xport->xbundle) {
450 list_remove(&xport->bundle_node);
452 xport->xbundle = xbundle_lookup(ofbundle);
453 if (xport->xbundle) {
454 list_insert(&xport->xbundle->xports, &xport->bundle_node);
457 clear_skb_priorities(xport);
458 for (i = 0; i < n_qdscp; i++) {
459 struct skb_priority_to_dscp *pdscp;
460 uint32_t skb_priority;
462 if (dpif_queue_to_priority(xport->xbridge->dpif, qdscp_list[i].queue,
467 pdscp = xmalloc(sizeof *pdscp);
468 pdscp->skb_priority = skb_priority;
469 pdscp->dscp = (qdscp_list[i].dscp << 2) & IP_DSCP_MASK;
470 hmap_insert(&xport->skb_priorities, &pdscp->hmap_node,
471 hash_int(pdscp->skb_priority, 0));
476 xlate_ofport_remove(struct ofport_dpif *ofport)
478 struct xport *xport = xport_lookup(ofport);
485 xport->peer->peer = NULL;
489 if (xport->xbundle) {
490 list_remove(&xport->bundle_node);
493 clear_skb_priorities(xport);
494 hmap_destroy(&xport->skb_priorities);
496 hmap_remove(&xports, &xport->hmap_node);
497 hmap_remove(&xport->xbridge->xports, &xport->ofp_node);
499 netdev_close(xport->netdev);
500 cfm_unref(xport->cfm);
501 bfd_unref(xport->bfd);
505 /* Given a datpath, packet, and flow metadata ('backer', 'packet', and 'key'
506 * respectively), populates 'flow' with the result of odp_flow_key_to_flow().
507 * Optionally, if nonnull, populates 'fitnessp' with the fitness of 'flow' as
508 * returned by odp_flow_key_to_flow(). Also, optionally populates 'ofproto'
509 * with the ofproto_dpif, and 'odp_in_port' with the datapath in_port, that
510 * 'packet' ingressed.
512 * If 'ofproto' is nonnull, requires 'flow''s in_port to exist. Otherwise sets
513 * 'flow''s in_port to OFPP_NONE.
515 * This function does post-processing on data returned from
516 * odp_flow_key_to_flow() to help make VLAN splinters transparent to the rest
517 * of the upcall processing logic. In particular, if the extracted in_port is
518 * a VLAN splinter port, it replaces flow->in_port by the "real" port, sets
519 * flow->vlan_tci correctly for the VLAN of the VLAN splinter port, and pushes
520 * a VLAN header onto 'packet' (if it is nonnull).
522 * Similarly, this function also includes some logic to help with tunnels. It
523 * may modify 'flow' as necessary to make the tunneling implementation
524 * transparent to the upcall processing logic.
526 * Returns 0 if successful, ENODEV if the parsed flow has no associated ofport,
527 * or some other positive errno if there are other problems. */
529 xlate_receive(const struct dpif_backer *backer, struct ofpbuf *packet,
530 const struct nlattr *key, size_t key_len,
531 struct flow *flow, enum odp_key_fitness *fitnessp,
532 struct ofproto_dpif **ofproto, odp_port_t *odp_in_port)
534 enum odp_key_fitness fitness;
535 const struct xport *xport;
538 ovs_rwlock_rdlock(&xlate_rwlock);
539 fitness = odp_flow_key_to_flow(key, key_len, flow);
540 if (fitness == ODP_FIT_ERROR) {
546 *odp_in_port = flow->in_port.odp_port;
549 xport = xport_lookup(tnl_port_should_receive(flow)
550 ? tnl_port_receive(flow)
551 : odp_port_to_ofport(backer, flow->in_port.odp_port));
553 flow->in_port.ofp_port = xport ? xport->ofp_port : OFPP_NONE;
558 if (vsp_adjust_flow(xport->xbridge->ofproto, flow)) {
560 /* Make the packet resemble the flow, so that it gets sent to
561 * an OpenFlow controller properly, so that it looks correct
562 * for sFlow, and so that flow_extract() will get the correct
563 * vlan_tci if it is called on 'packet'.
565 * The allocated space inside 'packet' probably also contains
566 * 'key', that is, both 'packet' and 'key' are probably part of
567 * a struct dpif_upcall (see the large comment on that
568 * structure definition), so pushing data on 'packet' is in
569 * general not a good idea since it could overwrite 'key' or
570 * free it as a side effect. However, it's OK in this special
571 * case because we know that 'packet' is inside a Netlink
572 * attribute: pushing 4 bytes will just overwrite the 4-byte
573 * "struct nlattr", which is fine since we don't need that
575 eth_push_vlan(packet, flow->vlan_tci);
577 /* We can't reproduce 'key' from 'flow'. */
578 fitness = fitness == ODP_FIT_PERFECT ? ODP_FIT_TOO_MUCH : fitness;
583 *ofproto = xport->xbridge->ofproto;
590 ovs_rwlock_unlock(&xlate_rwlock);
594 static struct xbridge *
595 xbridge_lookup(const struct ofproto_dpif *ofproto)
597 struct xbridge *xbridge;
603 HMAP_FOR_EACH_IN_BUCKET (xbridge, hmap_node, hash_pointer(ofproto, 0),
605 if (xbridge->ofproto == ofproto) {
612 static struct xbundle *
613 xbundle_lookup(const struct ofbundle *ofbundle)
615 struct xbundle *xbundle;
621 HMAP_FOR_EACH_IN_BUCKET (xbundle, hmap_node, hash_pointer(ofbundle, 0),
623 if (xbundle->ofbundle == ofbundle) {
630 static struct xport *
631 xport_lookup(const struct ofport_dpif *ofport)
639 HMAP_FOR_EACH_IN_BUCKET (xport, hmap_node, hash_pointer(ofport, 0),
641 if (xport->ofport == ofport) {
648 static struct stp_port *
649 xport_get_stp_port(const struct xport *xport)
651 return xport->xbridge->stp && xport->stp_port_no != -1
652 ? stp_get_port(xport->xbridge->stp, xport->stp_port_no)
656 static enum stp_state
657 xport_stp_learn_state(const struct xport *xport)
659 struct stp_port *sp = xport_get_stp_port(xport);
660 return stp_learn_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
664 xport_stp_forward_state(const struct xport *xport)
666 struct stp_port *sp = xport_get_stp_port(xport);
667 return stp_forward_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
670 /* Returns true if STP should process 'flow'. Sets fields in 'wc' that
671 * were used to make the determination.*/
673 stp_should_process_flow(const struct flow *flow, struct flow_wildcards *wc)
675 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
676 return eth_addr_equals(flow->dl_dst, eth_addr_stp);
680 stp_process_packet(const struct xport *xport, const struct ofpbuf *packet)
682 struct stp_port *sp = xport_get_stp_port(xport);
683 struct ofpbuf payload = *packet;
684 struct eth_header *eth = payload.data;
686 /* Sink packets on ports that have STP disabled when the bridge has
688 if (!sp || stp_port_get_state(sp) == STP_DISABLED) {
692 /* Trim off padding on payload. */
693 if (payload.size > ntohs(eth->eth_type) + ETH_HEADER_LEN) {
694 payload.size = ntohs(eth->eth_type) + ETH_HEADER_LEN;
697 if (ofpbuf_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) {
698 stp_received_bpdu(sp, payload.data, payload.size);
702 static struct xport *
703 get_ofp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
707 HMAP_FOR_EACH_IN_BUCKET (xport, ofp_node, hash_ofp_port(ofp_port),
709 if (xport->ofp_port == ofp_port) {
717 ofp_port_to_odp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
719 const struct xport *xport = get_ofp_port(xbridge, ofp_port);
720 return xport ? xport->odp_port : ODPP_NONE;
724 xbundle_trunks_vlan(const struct xbundle *bundle, uint16_t vlan)
726 return (bundle->vlan_mode != PORT_VLAN_ACCESS
727 && (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan)));
731 xbundle_includes_vlan(const struct xbundle *xbundle, uint16_t vlan)
733 return vlan == xbundle->vlan || xbundle_trunks_vlan(xbundle, vlan);
737 xbundle_mirror_out(const struct xbridge *xbridge, struct xbundle *xbundle)
739 return xbundle != &ofpp_none_bundle
740 ? mirror_bundle_out(xbridge->mbridge, xbundle->ofbundle)
745 xbundle_mirror_src(const struct xbridge *xbridge, struct xbundle *xbundle)
747 return xbundle != &ofpp_none_bundle
748 ? mirror_bundle_src(xbridge->mbridge, xbundle->ofbundle)
753 xbundle_mirror_dst(const struct xbridge *xbridge, struct xbundle *xbundle)
755 return xbundle != &ofpp_none_bundle
756 ? mirror_bundle_dst(xbridge->mbridge, xbundle->ofbundle)
760 static struct xbundle *
761 lookup_input_bundle(const struct xbridge *xbridge, ofp_port_t in_port,
762 bool warn, struct xport **in_xportp)
766 /* Find the port and bundle for the received packet. */
767 xport = get_ofp_port(xbridge, in_port);
771 if (xport && xport->xbundle) {
772 return xport->xbundle;
775 /* Special-case OFPP_NONE, which a controller may use as the ingress
776 * port for traffic that it is sourcing. */
777 if (in_port == OFPP_NONE) {
778 ofpp_none_bundle.name = "OFPP_NONE";
779 ofpp_none_bundle.vlan_mode = PORT_VLAN_TRUNK;
780 return &ofpp_none_bundle;
783 /* Odd. A few possible reasons here:
785 * - We deleted a port but there are still a few packets queued up
788 * - Someone externally added a port (e.g. "ovs-dpctl add-if") that
789 * we don't know about.
791 * - The ofproto client didn't configure the port as part of a bundle.
792 * This is particularly likely to happen if a packet was received on the
793 * port after it was created, but before the client had a chance to
794 * configure its bundle.
797 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
799 VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown "
800 "port %"PRIu16, xbridge->name, in_port);
806 add_mirror_actions(struct xlate_ctx *ctx, const struct flow *orig_flow)
808 const struct xbridge *xbridge = ctx->xbridge;
809 mirror_mask_t mirrors;
810 struct xbundle *in_xbundle;
814 mirrors = ctx->xout->mirrors;
815 ctx->xout->mirrors = 0;
817 in_xbundle = lookup_input_bundle(xbridge, orig_flow->in_port.ofp_port,
818 ctx->xin->packet != NULL, NULL);
822 mirrors |= xbundle_mirror_src(xbridge, in_xbundle);
824 /* Drop frames on bundles reserved for mirroring. */
825 if (xbundle_mirror_out(xbridge, in_xbundle)) {
826 if (ctx->xin->packet != NULL) {
827 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
828 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
829 "%s, which is reserved exclusively for mirroring",
830 ctx->xbridge->name, in_xbundle->name);
832 ofpbuf_clear(&ctx->xout->odp_actions);
837 vid = vlan_tci_to_vid(orig_flow->vlan_tci);
838 if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) {
841 vlan = input_vid_to_vlan(in_xbundle, vid);
847 /* Restore the original packet before adding the mirror actions. */
848 ctx->xin->flow = *orig_flow;
851 mirror_mask_t dup_mirrors;
852 struct ofbundle *out;
853 unsigned long *vlans;
858 has_mirror = mirror_get(xbridge->mbridge, mirror_mask_ffs(mirrors) - 1,
859 &vlans, &dup_mirrors, &out, &out_vlan);
860 ovs_assert(has_mirror);
863 ctx->xout->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK);
865 vlan_mirrored = !vlans || bitmap_is_set(vlans, vlan);
868 if (!vlan_mirrored) {
869 mirrors = zero_rightmost_1bit(mirrors);
873 mirrors &= ~dup_mirrors;
874 ctx->xout->mirrors |= dup_mirrors;
876 struct xbundle *out_xbundle = xbundle_lookup(out);
878 output_normal(ctx, out_xbundle, vlan);
880 } else if (vlan != out_vlan
881 && !eth_addr_is_reserved(orig_flow->dl_dst)) {
882 struct xbundle *xbundle;
884 LIST_FOR_EACH (xbundle, list_node, &xbridge->xbundles) {
885 if (xbundle_includes_vlan(xbundle, out_vlan)
886 && !xbundle_mirror_out(xbridge, xbundle)) {
887 output_normal(ctx, xbundle, out_vlan);
894 /* Given 'vid', the VID obtained from the 802.1Q header that was received as
895 * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle',
896 * the bundle on which the packet was received, returns the VLAN to which the
899 * Both 'vid' and the return value are in the range 0...4095. */
901 input_vid_to_vlan(const struct xbundle *in_xbundle, uint16_t vid)
903 switch (in_xbundle->vlan_mode) {
904 case PORT_VLAN_ACCESS:
905 return in_xbundle->vlan;
908 case PORT_VLAN_TRUNK:
911 case PORT_VLAN_NATIVE_UNTAGGED:
912 case PORT_VLAN_NATIVE_TAGGED:
913 return vid ? vid : in_xbundle->vlan;
920 /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'.
921 * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs
924 * 'vid' should be the VID obtained from the 802.1Q header that was received as
925 * part of a packet (specify 0 if there was no 802.1Q header), in the range
928 input_vid_is_valid(uint16_t vid, struct xbundle *in_xbundle, bool warn)
930 /* Allow any VID on the OFPP_NONE port. */
931 if (in_xbundle == &ofpp_none_bundle) {
935 switch (in_xbundle->vlan_mode) {
936 case PORT_VLAN_ACCESS:
939 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
940 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" tagged "
941 "packet received on port %s configured as VLAN "
942 "%"PRIu16" access port", vid, in_xbundle->name,
949 case PORT_VLAN_NATIVE_UNTAGGED:
950 case PORT_VLAN_NATIVE_TAGGED:
952 /* Port must always carry its native VLAN. */
956 case PORT_VLAN_TRUNK:
957 if (!xbundle_includes_vlan(in_xbundle, vid)) {
959 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
960 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" packet "
961 "received on port %s not configured for trunking "
962 "VLAN %"PRIu16, vid, in_xbundle->name, vid);
974 /* Given 'vlan', the VLAN that a packet belongs to, and
975 * 'out_xbundle', a bundle on which the packet is to be output, returns the VID
976 * that should be included in the 802.1Q header. (If the return value is 0,
977 * then the 802.1Q header should only be included in the packet if there is a
980 * Both 'vlan' and the return value are in the range 0...4095. */
982 output_vlan_to_vid(const struct xbundle *out_xbundle, uint16_t vlan)
984 switch (out_xbundle->vlan_mode) {
985 case PORT_VLAN_ACCESS:
988 case PORT_VLAN_TRUNK:
989 case PORT_VLAN_NATIVE_TAGGED:
992 case PORT_VLAN_NATIVE_UNTAGGED:
993 return vlan == out_xbundle->vlan ? 0 : vlan;
1001 output_normal(struct xlate_ctx *ctx, const struct xbundle *out_xbundle,
1004 ovs_be16 *flow_tci = &ctx->xin->flow.vlan_tci;
1006 ovs_be16 tci, old_tci;
1007 struct xport *xport;
1009 vid = output_vlan_to_vid(out_xbundle, vlan);
1010 if (list_is_empty(&out_xbundle->xports)) {
1011 /* Partially configured bundle with no slaves. Drop the packet. */
1013 } else if (!out_xbundle->bond) {
1014 xport = CONTAINER_OF(list_front(&out_xbundle->xports), struct xport,
1017 struct ofport_dpif *ofport;
1019 ofport = bond_choose_output_slave(out_xbundle->bond, &ctx->xin->flow,
1020 &ctx->xout->wc, vid);
1021 xport = xport_lookup(ofport);
1024 /* No slaves enabled, so drop packet. */
1029 old_tci = *flow_tci;
1031 if (tci || out_xbundle->use_priority_tags) {
1032 tci |= *flow_tci & htons(VLAN_PCP_MASK);
1034 tci |= htons(VLAN_CFI);
1039 compose_output_action(ctx, xport->ofp_port);
1040 *flow_tci = old_tci;
1043 /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after
1044 * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to
1045 * indicate this; newer upstream kernels use gratuitous ARP requests. */
1047 is_gratuitous_arp(const struct flow *flow, struct flow_wildcards *wc)
1049 if (flow->dl_type != htons(ETH_TYPE_ARP)) {
1053 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1054 if (!eth_addr_is_broadcast(flow->dl_dst)) {
1058 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
1059 if (flow->nw_proto == ARP_OP_REPLY) {
1061 } else if (flow->nw_proto == ARP_OP_REQUEST) {
1062 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
1063 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
1065 return flow->nw_src == flow->nw_dst;
1071 /* Checks whether a MAC learning update is necessary for MAC learning table
1072 * 'ml' given that a packet matching 'flow' was received on 'in_xbundle' in
1075 * Most packets processed through the MAC learning table do not actually
1076 * change it in any way. This function requires only a read lock on the MAC
1077 * learning table, so it is much cheaper in this common case.
1079 * Keep the code here synchronized with that in update_learning_table__()
1082 is_mac_learning_update_needed(const struct mac_learning *ml,
1083 const struct flow *flow,
1084 struct flow_wildcards *wc,
1085 int vlan, struct xbundle *in_xbundle)
1086 OVS_REQ_RDLOCK(ml->rwlock)
1088 struct mac_entry *mac;
1090 if (!mac_learning_may_learn(ml, flow->dl_src, vlan)) {
1094 mac = mac_learning_lookup(ml, flow->dl_src, vlan);
1095 if (!mac || mac_entry_age(ml, mac)) {
1099 if (is_gratuitous_arp(flow, wc)) {
1100 /* We don't want to learn from gratuitous ARP packets that are
1101 * reflected back over bond slaves so we lock the learning table. */
1102 if (!in_xbundle->bond) {
1104 } else if (mac_entry_is_grat_arp_locked(mac)) {
1109 return mac->port.p != in_xbundle->ofbundle;
1113 /* Updates MAC learning table 'ml' given that a packet matching 'flow' was
1114 * received on 'in_xbundle' in 'vlan'.
1116 * This code repeats all the checks in is_mac_learning_update_needed() because
1117 * the lock was released between there and here and thus the MAC learning state
1118 * could have changed.
1120 * Keep the code here synchronized with that in is_mac_learning_update_needed()
1123 update_learning_table__(const struct xbridge *xbridge,
1124 const struct flow *flow, struct flow_wildcards *wc,
1125 int vlan, struct xbundle *in_xbundle)
1126 OVS_REQ_WRLOCK(xbridge->ml->rwlock)
1128 struct mac_entry *mac;
1130 if (!mac_learning_may_learn(xbridge->ml, flow->dl_src, vlan)) {
1134 mac = mac_learning_insert(xbridge->ml, flow->dl_src, vlan);
1135 if (is_gratuitous_arp(flow, wc)) {
1136 /* We don't want to learn from gratuitous ARP packets that are
1137 * reflected back over bond slaves so we lock the learning table. */
1138 if (!in_xbundle->bond) {
1139 mac_entry_set_grat_arp_lock(mac);
1140 } else if (mac_entry_is_grat_arp_locked(mac)) {
1145 if (mac->port.p != in_xbundle->ofbundle) {
1146 /* The log messages here could actually be useful in debugging,
1147 * so keep the rate limit relatively high. */
1148 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
1150 VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
1151 "on port %s in VLAN %d",
1152 xbridge->name, ETH_ADDR_ARGS(flow->dl_src),
1153 in_xbundle->name, vlan);
1155 mac->port.p = in_xbundle->ofbundle;
1156 mac_learning_changed(xbridge->ml);
1161 update_learning_table(const struct xbridge *xbridge,
1162 const struct flow *flow, struct flow_wildcards *wc,
1163 int vlan, struct xbundle *in_xbundle)
1167 /* Don't learn the OFPP_NONE port. */
1168 if (in_xbundle == &ofpp_none_bundle) {
1172 /* First try the common case: no change to MAC learning table. */
1173 ovs_rwlock_rdlock(&xbridge->ml->rwlock);
1174 need_update = is_mac_learning_update_needed(xbridge->ml, flow, wc, vlan,
1176 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1179 /* Slow path: MAC learning table might need an update. */
1180 ovs_rwlock_wrlock(&xbridge->ml->rwlock);
1181 update_learning_table__(xbridge, flow, wc, vlan, in_xbundle);
1182 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1186 /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or
1187 * dropped. Returns true if they may be forwarded, false if they should be
1190 * 'in_port' must be the xport that corresponds to flow->in_port.
1191 * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull).
1193 * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as
1194 * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as
1195 * checked by input_vid_is_valid().
1197 * May also add tags to '*tags', although the current implementation only does
1198 * so in one special case.
1201 is_admissible(struct xlate_ctx *ctx, struct xport *in_port,
1204 struct xbundle *in_xbundle = in_port->xbundle;
1205 const struct xbridge *xbridge = ctx->xbridge;
1206 struct flow *flow = &ctx->xin->flow;
1208 /* Drop frames for reserved multicast addresses
1209 * only if forward_bpdu option is absent. */
1210 if (!xbridge->forward_bpdu && eth_addr_is_reserved(flow->dl_dst)) {
1211 xlate_report(ctx, "packet has reserved destination MAC, dropping");
1215 if (in_xbundle->bond) {
1216 struct mac_entry *mac;
1218 switch (bond_check_admissibility(in_xbundle->bond, in_port->ofport,
1224 xlate_report(ctx, "bonding refused admissibility, dropping");
1227 case BV_DROP_IF_MOVED:
1228 ovs_rwlock_rdlock(&xbridge->ml->rwlock);
1229 mac = mac_learning_lookup(xbridge->ml, flow->dl_src, vlan);
1230 if (mac && mac->port.p != in_xbundle->ofbundle &&
1231 (!is_gratuitous_arp(flow, &ctx->xout->wc)
1232 || mac_entry_is_grat_arp_locked(mac))) {
1233 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1234 xlate_report(ctx, "SLB bond thinks this packet looped back, "
1238 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1247 xlate_normal(struct xlate_ctx *ctx)
1249 struct flow_wildcards *wc = &ctx->xout->wc;
1250 struct flow *flow = &ctx->xin->flow;
1251 struct xbundle *in_xbundle;
1252 struct xport *in_port;
1253 struct mac_entry *mac;
1258 ctx->xout->has_normal = true;
1260 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
1261 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1262 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
1264 in_xbundle = lookup_input_bundle(ctx->xbridge, flow->in_port.ofp_port,
1265 ctx->xin->packet != NULL, &in_port);
1267 xlate_report(ctx, "no input bundle, dropping");
1271 /* Drop malformed frames. */
1272 if (flow->dl_type == htons(ETH_TYPE_VLAN) &&
1273 !(flow->vlan_tci & htons(VLAN_CFI))) {
1274 if (ctx->xin->packet != NULL) {
1275 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1276 VLOG_WARN_RL(&rl, "bridge %s: dropping packet with partial "
1277 "VLAN tag received on port %s",
1278 ctx->xbridge->name, in_xbundle->name);
1280 xlate_report(ctx, "partial VLAN tag, dropping");
1284 /* Drop frames on bundles reserved for mirroring. */
1285 if (xbundle_mirror_out(ctx->xbridge, in_xbundle)) {
1286 if (ctx->xin->packet != NULL) {
1287 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1288 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
1289 "%s, which is reserved exclusively for mirroring",
1290 ctx->xbridge->name, in_xbundle->name);
1292 xlate_report(ctx, "input port is mirror output port, dropping");
1297 vid = vlan_tci_to_vid(flow->vlan_tci);
1298 if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) {
1299 xlate_report(ctx, "disallowed VLAN VID for this input port, dropping");
1302 vlan = input_vid_to_vlan(in_xbundle, vid);
1304 /* Check other admissibility requirements. */
1305 if (in_port && !is_admissible(ctx, in_port, vlan)) {
1309 /* Learn source MAC. */
1310 if (ctx->xin->may_learn) {
1311 update_learning_table(ctx->xbridge, flow, wc, vlan, in_xbundle);
1314 /* Determine output bundle. */
1315 ovs_rwlock_rdlock(&ctx->xbridge->ml->rwlock);
1316 mac = mac_learning_lookup(ctx->xbridge->ml, flow->dl_dst, vlan);
1317 mac_port = mac ? mac->port.p : NULL;
1318 ovs_rwlock_unlock(&ctx->xbridge->ml->rwlock);
1321 struct xbundle *mac_xbundle = xbundle_lookup(mac_port);
1322 if (mac_xbundle && mac_xbundle != in_xbundle) {
1323 xlate_report(ctx, "forwarding to learned port");
1324 output_normal(ctx, mac_xbundle, vlan);
1325 } else if (!mac_xbundle) {
1326 xlate_report(ctx, "learned port is unknown, dropping");
1328 xlate_report(ctx, "learned port is input port, dropping");
1331 struct xbundle *xbundle;
1333 xlate_report(ctx, "no learned MAC for destination, flooding");
1334 LIST_FOR_EACH (xbundle, list_node, &ctx->xbridge->xbundles) {
1335 if (xbundle != in_xbundle
1336 && xbundle_includes_vlan(xbundle, vlan)
1337 && xbundle->floodable
1338 && !xbundle_mirror_out(ctx->xbridge, xbundle)) {
1339 output_normal(ctx, xbundle, vlan);
1342 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
1346 /* Compose SAMPLE action for sFlow or IPFIX. The given probability is
1347 * the number of packets out of UINT32_MAX to sample. The given
1348 * cookie is passed back in the callback for each sampled packet.
1351 compose_sample_action(const struct xbridge *xbridge,
1352 struct ofpbuf *odp_actions,
1353 const struct flow *flow,
1354 const uint32_t probability,
1355 const union user_action_cookie *cookie,
1356 const size_t cookie_size)
1358 size_t sample_offset, actions_offset;
1359 odp_port_t odp_port;
1363 sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE);
1365 nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability);
1367 actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS);
1369 odp_port = ofp_port_to_odp_port(xbridge, flow->in_port.ofp_port);
1370 pid = dpif_port_get_pid(xbridge->dpif, odp_port);
1371 cookie_offset = odp_put_userspace_action(pid, cookie, cookie_size, odp_actions);
1373 nl_msg_end_nested(odp_actions, actions_offset);
1374 nl_msg_end_nested(odp_actions, sample_offset);
1375 return cookie_offset;
1379 compose_sflow_cookie(const struct xbridge *xbridge, ovs_be16 vlan_tci,
1380 odp_port_t odp_port, unsigned int n_outputs,
1381 union user_action_cookie *cookie)
1385 cookie->type = USER_ACTION_COOKIE_SFLOW;
1386 cookie->sflow.vlan_tci = vlan_tci;
1388 /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output
1389 * port information") for the interpretation of cookie->output. */
1390 switch (n_outputs) {
1392 /* 0x40000000 | 256 means "packet dropped for unknown reason". */
1393 cookie->sflow.output = 0x40000000 | 256;
1397 ifindex = dpif_sflow_odp_port_to_ifindex(xbridge->sflow, odp_port);
1399 cookie->sflow.output = ifindex;
1404 /* 0x80000000 means "multiple output ports. */
1405 cookie->sflow.output = 0x80000000 | n_outputs;
1410 /* Compose SAMPLE action for sFlow bridge sampling. */
1412 compose_sflow_action(const struct xbridge *xbridge,
1413 struct ofpbuf *odp_actions,
1414 const struct flow *flow,
1415 odp_port_t odp_port)
1417 uint32_t probability;
1418 union user_action_cookie cookie;
1420 if (!xbridge->sflow || flow->in_port.ofp_port == OFPP_NONE) {
1424 probability = dpif_sflow_get_probability(xbridge->sflow);
1425 compose_sflow_cookie(xbridge, htons(0), odp_port,
1426 odp_port == ODPP_NONE ? 0 : 1, &cookie);
1428 return compose_sample_action(xbridge, odp_actions, flow, probability,
1429 &cookie, sizeof cookie.sflow);
1433 compose_flow_sample_cookie(uint16_t probability, uint32_t collector_set_id,
1434 uint32_t obs_domain_id, uint32_t obs_point_id,
1435 union user_action_cookie *cookie)
1437 cookie->type = USER_ACTION_COOKIE_FLOW_SAMPLE;
1438 cookie->flow_sample.probability = probability;
1439 cookie->flow_sample.collector_set_id = collector_set_id;
1440 cookie->flow_sample.obs_domain_id = obs_domain_id;
1441 cookie->flow_sample.obs_point_id = obs_point_id;
1445 compose_ipfix_cookie(union user_action_cookie *cookie)
1447 cookie->type = USER_ACTION_COOKIE_IPFIX;
1450 /* Compose SAMPLE action for IPFIX bridge sampling. */
1452 compose_ipfix_action(const struct xbridge *xbridge,
1453 struct ofpbuf *odp_actions,
1454 const struct flow *flow)
1456 uint32_t probability;
1457 union user_action_cookie cookie;
1459 if (!xbridge->ipfix || flow->in_port.ofp_port == OFPP_NONE) {
1463 probability = dpif_ipfix_get_bridge_exporter_probability(xbridge->ipfix);
1464 compose_ipfix_cookie(&cookie);
1466 compose_sample_action(xbridge, odp_actions, flow, probability,
1467 &cookie, sizeof cookie.ipfix);
1470 /* SAMPLE action for sFlow must be first action in any given list of
1471 * actions. At this point we do not have all information required to
1472 * build it. So try to build sample action as complete as possible. */
1474 add_sflow_action(struct xlate_ctx *ctx)
1476 ctx->user_cookie_offset = compose_sflow_action(ctx->xbridge,
1477 &ctx->xout->odp_actions,
1478 &ctx->xin->flow, ODPP_NONE);
1479 ctx->sflow_odp_port = 0;
1480 ctx->sflow_n_outputs = 0;
1483 /* SAMPLE action for IPFIX must be 1st or 2nd action in any given list
1484 * of actions, eventually after the SAMPLE action for sFlow. */
1486 add_ipfix_action(struct xlate_ctx *ctx)
1488 compose_ipfix_action(ctx->xbridge, &ctx->xout->odp_actions,
1492 /* Fix SAMPLE action according to data collected while composing ODP actions.
1493 * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested
1494 * USERSPACE action's user-cookie which is required for sflow. */
1496 fix_sflow_action(struct xlate_ctx *ctx)
1498 const struct flow *base = &ctx->base_flow;
1499 union user_action_cookie *cookie;
1501 if (!ctx->user_cookie_offset) {
1505 cookie = ofpbuf_at(&ctx->xout->odp_actions, ctx->user_cookie_offset,
1506 sizeof cookie->sflow);
1507 ovs_assert(cookie->type == USER_ACTION_COOKIE_SFLOW);
1509 compose_sflow_cookie(ctx->xbridge, base->vlan_tci,
1510 ctx->sflow_odp_port, ctx->sflow_n_outputs, cookie);
1513 static enum slow_path_reason
1514 process_special(struct xlate_ctx *ctx, const struct flow *flow,
1515 const struct xport *xport, const struct ofpbuf *packet)
1517 struct flow_wildcards *wc = &ctx->xout->wc;
1518 const struct xbridge *xbridge = ctx->xbridge;
1522 } else if (xport->cfm && cfm_should_process_flow(xport->cfm, flow, wc)) {
1524 cfm_process_heartbeat(xport->cfm, packet);
1527 } else if (xport->bfd && bfd_should_process_flow(xport->bfd, flow, wc)) {
1529 bfd_process_packet(xport->bfd, flow, packet);
1532 } else if (xport->xbundle && xport->xbundle->lacp
1533 && flow->dl_type == htons(ETH_TYPE_LACP)) {
1535 lacp_process_packet(xport->xbundle->lacp, xport->ofport, packet);
1538 } else if (xbridge->stp && stp_should_process_flow(flow, wc)) {
1540 stp_process_packet(xport, packet);
1549 compose_output_action__(struct xlate_ctx *ctx, ofp_port_t ofp_port,
1552 const struct xport *xport = get_ofp_port(ctx->xbridge, ofp_port);
1553 struct flow_wildcards *wc = &ctx->xout->wc;
1554 struct flow *flow = &ctx->xin->flow;
1555 ovs_be16 flow_vlan_tci;
1556 uint32_t flow_pkt_mark;
1557 uint8_t flow_nw_tos;
1558 odp_port_t out_port, odp_port;
1561 /* If 'struct flow' gets additional metadata, we'll need to zero it out
1562 * before traversing a patch port. */
1563 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 22);
1566 xlate_report(ctx, "Nonexistent output port");
1568 } else if (xport->config & OFPUTIL_PC_NO_FWD) {
1569 xlate_report(ctx, "OFPPC_NO_FWD set, skipping output");
1571 } else if (check_stp && !xport_stp_forward_state(xport)) {
1572 xlate_report(ctx, "STP not in forwarding state, skipping output");
1576 if (mbridge_has_mirrors(ctx->xbridge->mbridge) && xport->xbundle) {
1577 ctx->xout->mirrors |= xbundle_mirror_dst(xport->xbundle->xbridge,
1582 const struct xport *peer = xport->peer;
1583 struct flow old_flow = ctx->xin->flow;
1584 enum slow_path_reason special;
1586 ctx->xbridge = peer->xbridge;
1587 flow->in_port.ofp_port = peer->ofp_port;
1588 flow->metadata = htonll(0);
1589 memset(&flow->tunnel, 0, sizeof flow->tunnel);
1590 memset(flow->regs, 0, sizeof flow->regs);
1592 special = process_special(ctx, &ctx->xin->flow, peer,
1595 ctx->xout->slow |= special;
1596 } else if (may_receive(peer, ctx)) {
1597 if (xport_stp_forward_state(peer)) {
1598 xlate_table_action(ctx, flow->in_port.ofp_port, 0, true);
1600 /* Forwarding is disabled by STP. Let OFPP_NORMAL and the
1601 * learning action look at the packet, then drop it. */
1602 struct flow old_base_flow = ctx->base_flow;
1603 size_t old_size = ctx->xout->odp_actions.size;
1604 mirror_mask_t old_mirrors = ctx->xout->mirrors;
1605 xlate_table_action(ctx, flow->in_port.ofp_port, 0, true);
1606 ctx->xout->mirrors = old_mirrors;
1607 ctx->base_flow = old_base_flow;
1608 ctx->xout->odp_actions.size = old_size;
1612 ctx->xin->flow = old_flow;
1613 ctx->xbridge = xport->xbridge;
1615 if (ctx->xin->resubmit_stats) {
1616 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
1617 netdev_vport_inc_rx(peer->netdev, ctx->xin->resubmit_stats);
1623 flow_vlan_tci = flow->vlan_tci;
1624 flow_pkt_mark = flow->pkt_mark;
1625 flow_nw_tos = flow->nw_tos;
1627 if (dscp_from_skb_priority(xport, flow->skb_priority, &dscp)) {
1628 wc->masks.nw_tos |= IP_ECN_MASK;
1629 flow->nw_tos &= ~IP_DSCP_MASK;
1630 flow->nw_tos |= dscp;
1633 if (xport->is_tunnel) {
1634 /* Save tunnel metadata so that changes made due to
1635 * the Logical (tunnel) Port are not visible for any further
1636 * matches, while explicit set actions on tunnel metadata are.
1638 struct flow_tnl flow_tnl = flow->tunnel;
1639 odp_port = tnl_port_send(xport->ofport, flow, &ctx->xout->wc);
1640 if (odp_port == ODPP_NONE) {
1641 xlate_report(ctx, "Tunneling decided against output");
1642 goto out; /* restore flow_nw_tos */
1644 if (flow->tunnel.ip_dst == ctx->orig_tunnel_ip_dst) {
1645 xlate_report(ctx, "Not tunneling to our own address");
1646 goto out; /* restore flow_nw_tos */
1648 if (ctx->xin->resubmit_stats) {
1649 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
1651 out_port = odp_port;
1652 commit_odp_tunnel_action(flow, &ctx->base_flow,
1653 &ctx->xout->odp_actions);
1654 flow->tunnel = flow_tnl; /* Restore tunnel metadata */
1656 ofp_port_t vlandev_port;
1658 odp_port = xport->odp_port;
1659 if (ofproto_has_vlan_splinters(ctx->xbridge->ofproto)) {
1660 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
1662 vlandev_port = vsp_realdev_to_vlandev(ctx->xbridge->ofproto, ofp_port,
1664 if (vlandev_port == ofp_port) {
1665 out_port = odp_port;
1667 out_port = ofp_port_to_odp_port(ctx->xbridge, vlandev_port);
1668 flow->vlan_tci = htons(0);
1672 if (out_port != ODPP_NONE) {
1673 ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow,
1674 &ctx->xout->odp_actions,
1676 &ctx->mpls_depth_delta);
1677 nl_msg_put_odp_port(&ctx->xout->odp_actions, OVS_ACTION_ATTR_OUTPUT,
1680 ctx->sflow_odp_port = odp_port;
1681 ctx->sflow_n_outputs++;
1682 ctx->xout->nf_output_iface = ofp_port;
1687 flow->vlan_tci = flow_vlan_tci;
1688 flow->pkt_mark = flow_pkt_mark;
1689 flow->nw_tos = flow_nw_tos;
1693 compose_output_action(struct xlate_ctx *ctx, ofp_port_t ofp_port)
1695 compose_output_action__(ctx, ofp_port, true);
1699 xlate_recursively(struct xlate_ctx *ctx, struct rule_dpif *rule)
1701 struct rule_dpif *old_rule = ctx->rule;
1702 struct rule_actions *actions;
1704 if (ctx->xin->resubmit_stats) {
1705 rule_dpif_credit_stats(rule, ctx->xin->resubmit_stats);
1711 actions = rule_dpif_get_actions(rule);
1712 do_xlate_actions(actions->ofpacts, actions->ofpacts_len, ctx);
1713 rule_actions_unref(actions);
1714 ctx->rule = old_rule;
1719 xlate_resubmit_resource_check(struct xlate_ctx *ctx)
1721 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
1723 if (ctx->recurse >= MAX_RESUBMIT_RECURSION) {
1724 VLOG_ERR_RL(&rl, "resubmit actions recursed over %d times",
1725 MAX_RESUBMIT_RECURSION);
1726 } else if (ctx->resubmits >= MAX_RESUBMITS) {
1727 VLOG_ERR_RL(&rl, "over %d resubmit actions", MAX_RESUBMITS);
1728 } else if (ctx->xout->odp_actions.size > UINT16_MAX) {
1729 VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of actions");
1730 } else if (ctx->stack.size >= 65536) {
1731 VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of stack");
1740 xlate_table_action(struct xlate_ctx *ctx,
1741 ofp_port_t in_port, uint8_t table_id, bool may_packet_in)
1743 if (xlate_resubmit_resource_check(ctx)) {
1744 struct rule_dpif *rule;
1745 ofp_port_t old_in_port = ctx->xin->flow.in_port.ofp_port;
1746 uint8_t old_table_id = ctx->table_id;
1748 ctx->table_id = table_id;
1750 /* Look up a flow with 'in_port' as the input port. Then restore the
1751 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
1752 * have surprising behavior). */
1753 ctx->xin->flow.in_port.ofp_port = in_port;
1754 rule_dpif_lookup_in_table(ctx->xbridge->ofproto,
1755 &ctx->xin->flow, &ctx->xout->wc,
1757 ctx->xin->flow.in_port.ofp_port = old_in_port;
1759 if (ctx->xin->resubmit_hook) {
1760 ctx->xin->resubmit_hook(ctx->xin, rule, ctx->recurse);
1763 if (!rule && may_packet_in) {
1764 struct xport *xport;
1767 * check if table configuration flags
1768 * OFPTC_TABLE_MISS_CONTROLLER, default.
1769 * OFPTC_TABLE_MISS_CONTINUE,
1770 * OFPTC_TABLE_MISS_DROP
1771 * When OF1.0, OFPTC_TABLE_MISS_CONTINUE is used. What to do? */
1772 xport = get_ofp_port(ctx->xbridge, ctx->xin->flow.in_port.ofp_port);
1773 choose_miss_rule(xport ? xport->config : 0,
1774 ctx->xbridge->miss_rule,
1775 ctx->xbridge->no_packet_in_rule, &rule);
1778 xlate_recursively(ctx, rule);
1779 rule_dpif_unref(rule);
1782 ctx->table_id = old_table_id;
1790 xlate_group_bucket(struct xlate_ctx *ctx, const struct ofputil_bucket *bucket)
1792 uint64_t action_list_stub[1024 / 8];
1793 struct ofpbuf action_list, action_set;
1795 ofpbuf_use_const(&action_set, bucket->ofpacts, bucket->ofpacts_len);
1796 ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub);
1798 ofpacts_execute_action_set(&action_list, &action_set);
1800 do_xlate_actions(action_list.data, action_list.size, ctx);
1803 ofpbuf_uninit(&action_set);
1804 ofpbuf_uninit(&action_list);
1808 xlate_all_group(struct xlate_ctx *ctx, struct group_dpif *group)
1810 const struct ofputil_bucket *bucket;
1811 const struct list *buckets;
1812 struct flow old_flow = ctx->xin->flow;
1814 group_dpif_get_buckets(group, &buckets);
1816 LIST_FOR_EACH (bucket, list_node, buckets) {
1817 xlate_group_bucket(ctx, bucket);
1818 /* Roll back flow to previous state.
1819 * This is equivalent to cloning the packet for each bucket.
1821 * As a side effect any subsequently applied actions will
1822 * also effectively be applied to a clone of the packet taken
1823 * just before applying the all or indirect group. */
1824 ctx->xin->flow = old_flow;
1829 xlate_group_action__(struct xlate_ctx *ctx, struct group_dpif *group)
1831 switch (group_dpif_get_type(group)) {
1833 case OFPGT11_INDIRECT:
1834 xlate_all_group(ctx, group);
1836 case OFPGT11_SELECT:
1838 /* XXX not yet implemented */
1843 group_dpif_release(group);
1847 xlate_group_action(struct xlate_ctx *ctx, uint32_t group_id)
1849 if (xlate_resubmit_resource_check(ctx)) {
1850 struct group_dpif *group;
1853 got_group = group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group);
1855 xlate_group_action__(ctx, group);
1865 xlate_ofpact_resubmit(struct xlate_ctx *ctx,
1866 const struct ofpact_resubmit *resubmit)
1871 in_port = resubmit->in_port;
1872 if (in_port == OFPP_IN_PORT) {
1873 in_port = ctx->xin->flow.in_port.ofp_port;
1876 table_id = resubmit->table_id;
1877 if (table_id == 255) {
1878 table_id = ctx->table_id;
1881 xlate_table_action(ctx, in_port, table_id, false);
1885 flood_packets(struct xlate_ctx *ctx, bool all)
1887 const struct xport *xport;
1889 HMAP_FOR_EACH (xport, ofp_node, &ctx->xbridge->xports) {
1890 if (xport->ofp_port == ctx->xin->flow.in_port.ofp_port) {
1895 compose_output_action__(ctx, xport->ofp_port, false);
1896 } else if (!(xport->config & OFPUTIL_PC_NO_FLOOD)) {
1897 compose_output_action(ctx, xport->ofp_port);
1901 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
1905 execute_controller_action(struct xlate_ctx *ctx, int len,
1906 enum ofp_packet_in_reason reason,
1907 uint16_t controller_id)
1909 struct ofproto_packet_in *pin;
1910 struct ofpbuf *packet;
1913 ctx->xout->slow |= SLOW_CONTROLLER;
1914 if (!ctx->xin->packet) {
1918 packet = ofpbuf_clone(ctx->xin->packet);
1920 key.skb_priority = 0;
1922 memset(&key.tunnel, 0, sizeof key.tunnel);
1924 ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
1925 &ctx->xout->odp_actions,
1927 &ctx->mpls_depth_delta);
1929 odp_execute_actions(NULL, packet, &key, ctx->xout->odp_actions.data,
1930 ctx->xout->odp_actions.size, NULL, NULL);
1932 pin = xmalloc(sizeof *pin);
1933 pin->up.packet_len = packet->size;
1934 pin->up.packet = ofpbuf_steal_data(packet);
1935 pin->up.reason = reason;
1936 pin->up.table_id = ctx->table_id;
1937 pin->up.cookie = (ctx->rule
1938 ? rule_dpif_get_flow_cookie(ctx->rule)
1941 flow_get_metadata(&ctx->xin->flow, &pin->up.fmd);
1943 pin->controller_id = controller_id;
1944 pin->send_len = len;
1945 pin->generated_by_table_miss = (ctx->rule
1946 && rule_dpif_is_table_miss(ctx->rule));
1947 ofproto_dpif_send_packet_in(ctx->xbridge->ofproto, pin);
1948 ofpbuf_delete(packet);
1952 compose_mpls_push_action(struct xlate_ctx *ctx, ovs_be16 eth_type)
1954 struct flow_wildcards *wc = &ctx->xout->wc;
1955 struct flow *flow = &ctx->xin->flow;
1957 ovs_assert(eth_type_mpls(eth_type));
1959 /* If mpls_depth_delta is negative then an MPLS POP action has been
1960 * composed and the resulting MPLS label stack is unknown. This means
1961 * an MPLS PUSH action can't be composed as it needs to know either the
1962 * top-most MPLS LSE to use as a template for the new MPLS LSE, or that
1963 * there is no MPLS label stack present. Thus, stop processing.
1965 * If mpls_depth_delta is positive then an MPLS PUSH action has been
1966 * composed and no further MPLS PUSH action may be performed without
1967 * losing MPLS LSE and ether type information held in xtx->xin->flow.
1968 * Thus, stop processing.
1970 * If the MPLS LSE of the flow and base_flow differ then the MPLS LSE
1971 * has been updated. Performing a MPLS PUSH action may be would result in
1972 * losing MPLS LSE and ether type information held in xtx->xin->flow.
1973 * Thus, stop processing.
1975 * It is planned that in the future this case will be handled
1976 * by recirculation */
1977 if (ctx->mpls_depth_delta ||
1978 ctx->xin->flow.mpls_lse != ctx->base_flow.mpls_lse) {
1982 memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse);
1984 ctx->pre_push_mpls_lse = ctx->xin->flow.mpls_lse;
1986 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
1987 flow->mpls_lse &= ~htonl(MPLS_BOS_MASK);
1992 if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
1993 label = htonl(0x2); /* IPV6 Explicit Null. */
1995 label = htonl(0x0); /* IPV4 Explicit Null. */
1997 wc->masks.nw_tos |= IP_DSCP_MASK;
1998 wc->masks.nw_ttl = 0xff;
1999 tc = (flow->nw_tos & IP_DSCP_MASK) >> 2;
2000 ttl = flow->nw_ttl ? flow->nw_ttl : 0x40;
2001 flow->mpls_lse = set_mpls_lse_values(ttl, tc, 1, label);
2003 flow->dl_type = eth_type;
2004 ctx->mpls_depth_delta++;
2010 compose_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type)
2012 struct flow_wildcards *wc = &ctx->xout->wc;
2014 if (!eth_type_mpls(ctx->xin->flow.dl_type)) {
2018 /* If mpls_depth_delta is negative then an MPLS POP action has been
2019 * composed. Performing another MPLS POP action
2020 * would result in losing ether type that results from
2021 * the already composed MPLS POP. Thus, stop processing.
2023 * It is planned that in the future this case will be handled
2024 * by recirculation */
2025 if (ctx->mpls_depth_delta < 0) {
2029 memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse);
2031 /* If mpls_depth_delta is positive then an MPLS PUSH action has been
2032 * executed and the previous MPLS LSE saved in ctx->pre_push_mpls_lse. The
2033 * flow's MPLS LSE should be restored to that value to allow any
2034 * subsequent actions that update of the LSE to be executed correctly.
2036 if (ctx->mpls_depth_delta > 0) {
2037 ctx->xin->flow.mpls_lse = ctx->pre_push_mpls_lse;
2040 ctx->xin->flow.dl_type = eth_type;
2041 ctx->mpls_depth_delta--;
2047 compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids)
2049 struct flow *flow = &ctx->xin->flow;
2051 if (!is_ip_any(flow)) {
2055 ctx->xout->wc.masks.nw_ttl = 0xff;
2056 if (flow->nw_ttl > 1) {
2062 for (i = 0; i < ids->n_controllers; i++) {
2063 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL,
2067 /* Stop processing for current table. */
2073 compose_set_mpls_label_action(struct xlate_ctx *ctx, ovs_be32 label)
2075 if (!eth_type_mpls(ctx->xin->flow.dl_type)) {
2079 /* If mpls_depth_delta is negative then an MPLS POP action has been
2080 * executed and the resulting MPLS label stack is unknown. This means
2081 * a SET MPLS LABEL action can't be executed as it needs to manipulate
2082 * the top-most MPLS LSE. Thus, stop processing.
2084 * It is planned that in the future this case will be handled
2087 if (ctx->mpls_depth_delta < 0) {
2091 ctx->xout->wc.masks.mpls_lse |= htonl(MPLS_LABEL_MASK);
2092 set_mpls_lse_label(&ctx->xin->flow.mpls_lse, label);
2097 compose_set_mpls_tc_action(struct xlate_ctx *ctx, uint8_t tc)
2099 if (!eth_type_mpls(ctx->xin->flow.dl_type)) {
2103 /* If mpls_depth_delta is negative then an MPLS POP action has been
2104 * executed and the resulting MPLS label stack is unknown. This means
2105 * a SET MPLS TC action can't be executed as it needs to manipulate
2106 * the top-most MPLS LSE. Thus, stop processing.
2108 * It is planned that in the future this case will be handled
2111 if (ctx->mpls_depth_delta < 0) {
2115 ctx->xout->wc.masks.mpls_lse |= htonl(MPLS_TC_MASK);
2116 set_mpls_lse_tc(&ctx->xin->flow.mpls_lse, tc);
2121 compose_set_mpls_ttl_action(struct xlate_ctx *ctx, uint8_t ttl)
2123 if (!eth_type_mpls(ctx->xin->flow.dl_type)) {
2127 /* If mpls_depth_delta is negative then an MPLS POP action has been
2128 * executed and the resulting MPLS label stack is unknown. This means
2129 * a SET MPLS TTL push action can't be executed as it needs to manipulate
2130 * the top-most MPLS LSE. Thus, stop processing.
2132 * It is planned that in the future this case will be handled
2135 if (ctx->mpls_depth_delta < 0) {
2139 ctx->xout->wc.masks.mpls_lse |= htonl(MPLS_TTL_MASK);
2140 set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse, ttl);
2145 compose_dec_mpls_ttl_action(struct xlate_ctx *ctx)
2147 struct flow *flow = &ctx->xin->flow;
2148 uint8_t ttl = mpls_lse_to_ttl(flow->mpls_lse);
2149 struct flow_wildcards *wc = &ctx->xout->wc;
2151 memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse);
2153 if (!eth_type_mpls(flow->dl_type)) {
2159 set_mpls_lse_ttl(&flow->mpls_lse, ttl);
2162 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, 0);
2164 /* Stop processing for current table. */
2170 xlate_output_action(struct xlate_ctx *ctx,
2171 ofp_port_t port, uint16_t max_len, bool may_packet_in)
2173 ofp_port_t prev_nf_output_iface = ctx->xout->nf_output_iface;
2175 ctx->xout->nf_output_iface = NF_OUT_DROP;
2179 compose_output_action(ctx, ctx->xin->flow.in_port.ofp_port);
2182 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
2189 flood_packets(ctx, false);
2192 flood_packets(ctx, true);
2194 case OFPP_CONTROLLER:
2195 execute_controller_action(ctx, max_len, OFPR_ACTION, 0);
2201 if (port != ctx->xin->flow.in_port.ofp_port) {
2202 compose_output_action(ctx, port);
2204 xlate_report(ctx, "skipping output to input port");
2209 if (prev_nf_output_iface == NF_OUT_FLOOD) {
2210 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
2211 } else if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
2212 ctx->xout->nf_output_iface = prev_nf_output_iface;
2213 } else if (prev_nf_output_iface != NF_OUT_DROP &&
2214 ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
2215 ctx->xout->nf_output_iface = NF_OUT_MULTI;
2220 xlate_output_reg_action(struct xlate_ctx *ctx,
2221 const struct ofpact_output_reg *or)
2223 uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow);
2224 if (port <= UINT16_MAX) {
2225 union mf_subvalue value;
2227 memset(&value, 0xff, sizeof value);
2228 mf_write_subfield_flow(&or->src, &value, &ctx->xout->wc.masks);
2229 xlate_output_action(ctx, u16_to_ofp(port),
2230 or->max_len, false);
2235 xlate_enqueue_action(struct xlate_ctx *ctx,
2236 const struct ofpact_enqueue *enqueue)
2238 ofp_port_t ofp_port = enqueue->port;
2239 uint32_t queue_id = enqueue->queue;
2240 uint32_t flow_priority, priority;
2243 /* Translate queue to priority. */
2244 error = dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &priority);
2246 /* Fall back to ordinary output action. */
2247 xlate_output_action(ctx, enqueue->port, 0, false);
2251 /* Check output port. */
2252 if (ofp_port == OFPP_IN_PORT) {
2253 ofp_port = ctx->xin->flow.in_port.ofp_port;
2254 } else if (ofp_port == ctx->xin->flow.in_port.ofp_port) {
2258 /* Add datapath actions. */
2259 flow_priority = ctx->xin->flow.skb_priority;
2260 ctx->xin->flow.skb_priority = priority;
2261 compose_output_action(ctx, ofp_port);
2262 ctx->xin->flow.skb_priority = flow_priority;
2264 /* Update NetFlow output port. */
2265 if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
2266 ctx->xout->nf_output_iface = ofp_port;
2267 } else if (ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
2268 ctx->xout->nf_output_iface = NF_OUT_MULTI;
2273 xlate_set_queue_action(struct xlate_ctx *ctx, uint32_t queue_id)
2275 uint32_t skb_priority;
2277 if (!dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &skb_priority)) {
2278 ctx->xin->flow.skb_priority = skb_priority;
2280 /* Couldn't translate queue to a priority. Nothing to do. A warning
2281 * has already been logged. */
2286 slave_enabled_cb(ofp_port_t ofp_port, void *xbridge_)
2288 const struct xbridge *xbridge = xbridge_;
2299 case OFPP_CONTROLLER: /* Not supported by the bundle action. */
2302 port = get_ofp_port(xbridge, ofp_port);
2303 return port ? port->may_enable : false;
2308 xlate_bundle_action(struct xlate_ctx *ctx,
2309 const struct ofpact_bundle *bundle)
2313 port = bundle_execute(bundle, &ctx->xin->flow, &ctx->xout->wc,
2315 CONST_CAST(struct xbridge *, ctx->xbridge));
2316 if (bundle->dst.field) {
2317 nxm_reg_load(&bundle->dst, ofp_to_u16(port), &ctx->xin->flow,
2320 xlate_output_action(ctx, port, 0, false);
2325 xlate_learn_action(struct xlate_ctx *ctx,
2326 const struct ofpact_learn *learn)
2328 uint64_t ofpacts_stub[1024 / 8];
2329 struct ofputil_flow_mod fm;
2330 struct ofpbuf ofpacts;
2332 ctx->xout->has_learn = true;
2334 learn_mask(learn, &ctx->xout->wc);
2336 if (!ctx->xin->may_learn) {
2340 ofpbuf_use_stub(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
2341 learn_execute(learn, &ctx->xin->flow, &fm, &ofpacts);
2342 ofproto_dpif_flow_mod(ctx->xbridge->ofproto, &fm);
2343 ofpbuf_uninit(&ofpacts);
2347 xlate_fin_timeout(struct xlate_ctx *ctx,
2348 const struct ofpact_fin_timeout *oft)
2350 if (ctx->xin->tcp_flags & (TCP_FIN | TCP_RST) && ctx->rule) {
2351 rule_dpif_reduce_timeouts(ctx->rule, oft->fin_idle_timeout,
2352 oft->fin_hard_timeout);
2357 xlate_sample_action(struct xlate_ctx *ctx,
2358 const struct ofpact_sample *os)
2360 union user_action_cookie cookie;
2361 /* Scale the probability from 16-bit to 32-bit while representing
2362 * the same percentage. */
2363 uint32_t probability = (os->probability << 16) | os->probability;
2365 ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
2366 &ctx->xout->odp_actions,
2368 &ctx->mpls_depth_delta);
2370 compose_flow_sample_cookie(os->probability, os->collector_set_id,
2371 os->obs_domain_id, os->obs_point_id, &cookie);
2372 compose_sample_action(ctx->xbridge, &ctx->xout->odp_actions, &ctx->xin->flow,
2373 probability, &cookie, sizeof cookie.flow_sample);
2377 may_receive(const struct xport *xport, struct xlate_ctx *ctx)
2379 if (xport->config & (eth_addr_equals(ctx->xin->flow.dl_dst, eth_addr_stp)
2380 ? OFPUTIL_PC_NO_RECV_STP
2381 : OFPUTIL_PC_NO_RECV)) {
2385 /* Only drop packets here if both forwarding and learning are
2386 * disabled. If just learning is enabled, we need to have
2387 * OFPP_NORMAL and the learning action have a look at the packet
2388 * before we can drop it. */
2389 if (!xport_stp_forward_state(xport) && !xport_stp_learn_state(xport)) {
2397 xlate_write_actions(struct xlate_ctx *ctx, const struct ofpact *a)
2399 struct ofpact_nest *on = ofpact_get_WRITE_ACTIONS(a);
2400 ofpbuf_put(&ctx->action_set, on->actions, ofpact_nest_get_action_len(on));
2401 ofpact_pad(&ctx->action_set);
2405 xlate_action_set(struct xlate_ctx *ctx)
2407 uint64_t action_list_stub[1024 / 64];
2408 struct ofpbuf action_list;
2410 ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub);
2411 ofpacts_execute_action_set(&action_list, &ctx->action_set);
2412 do_xlate_actions(action_list.data, action_list.size, ctx);
2413 ofpbuf_uninit(&action_list);
2417 do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len,
2418 struct xlate_ctx *ctx)
2420 struct flow_wildcards *wc = &ctx->xout->wc;
2421 struct flow *flow = &ctx->xin->flow;
2422 const struct ofpact *a;
2424 /* dl_type already in the mask, not set below. */
2426 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
2427 struct ofpact_controller *controller;
2428 const struct ofpact_metadata *metadata;
2429 const struct ofpact_set_field *set_field;
2430 const struct mf_field *mf;
2438 xlate_output_action(ctx, ofpact_get_OUTPUT(a)->port,
2439 ofpact_get_OUTPUT(a)->max_len, true);
2443 if (xlate_group_action(ctx, ofpact_get_GROUP(a)->group_id)) {
2448 case OFPACT_CONTROLLER:
2449 controller = ofpact_get_CONTROLLER(a);
2450 execute_controller_action(ctx, controller->max_len,
2452 controller->controller_id);
2455 case OFPACT_ENQUEUE:
2456 xlate_enqueue_action(ctx, ofpact_get_ENQUEUE(a));
2459 case OFPACT_SET_VLAN_VID:
2460 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
2461 if (flow->vlan_tci & htons(VLAN_CFI) ||
2462 ofpact_get_SET_VLAN_VID(a)->push_vlan_if_needed) {
2463 flow->vlan_tci &= ~htons(VLAN_VID_MASK);
2464 flow->vlan_tci |= (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid)
2469 case OFPACT_SET_VLAN_PCP:
2470 wc->masks.vlan_tci |= htons(VLAN_PCP_MASK | VLAN_CFI);
2471 if (flow->vlan_tci & htons(VLAN_CFI) ||
2472 ofpact_get_SET_VLAN_PCP(a)->push_vlan_if_needed) {
2473 flow->vlan_tci &= ~htons(VLAN_PCP_MASK);
2474 flow->vlan_tci |= htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp
2475 << VLAN_PCP_SHIFT) | VLAN_CFI);
2479 case OFPACT_STRIP_VLAN:
2480 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
2481 flow->vlan_tci = htons(0);
2484 case OFPACT_PUSH_VLAN:
2485 /* XXX 802.1AD(QinQ) */
2486 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
2487 flow->vlan_tci = htons(VLAN_CFI);
2490 case OFPACT_SET_ETH_SRC:
2491 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
2492 memcpy(flow->dl_src, ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN);
2495 case OFPACT_SET_ETH_DST:
2496 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
2497 memcpy(flow->dl_dst, ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN);
2500 case OFPACT_SET_IPV4_SRC:
2501 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2502 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
2503 flow->nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4;
2507 case OFPACT_SET_IPV4_DST:
2508 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2509 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
2510 flow->nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4;
2514 case OFPACT_SET_IP_DSCP:
2515 if (is_ip_any(flow)) {
2516 wc->masks.nw_tos |= IP_DSCP_MASK;
2517 flow->nw_tos &= ~IP_DSCP_MASK;
2518 flow->nw_tos |= ofpact_get_SET_IP_DSCP(a)->dscp;
2522 case OFPACT_SET_IP_ECN:
2523 if (is_ip_any(flow)) {
2524 wc->masks.nw_tos |= IP_ECN_MASK;
2525 flow->nw_tos &= ~IP_ECN_MASK;
2526 flow->nw_tos |= ofpact_get_SET_IP_ECN(a)->ecn;
2530 case OFPACT_SET_IP_TTL:
2531 if (is_ip_any(flow)) {
2532 wc->masks.nw_ttl = 0xff;
2533 flow->nw_ttl = ofpact_get_SET_IP_TTL(a)->ttl;
2537 case OFPACT_SET_L4_SRC_PORT:
2538 if (is_ip_any(flow)) {
2539 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2540 memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src);
2541 flow->tp_src = htons(ofpact_get_SET_L4_SRC_PORT(a)->port);
2545 case OFPACT_SET_L4_DST_PORT:
2546 if (is_ip_any(flow)) {
2547 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2548 memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst);
2549 flow->tp_dst = htons(ofpact_get_SET_L4_DST_PORT(a)->port);
2553 case OFPACT_RESUBMIT:
2554 xlate_ofpact_resubmit(ctx, ofpact_get_RESUBMIT(a));
2557 case OFPACT_SET_TUNNEL:
2558 flow->tunnel.tun_id = htonll(ofpact_get_SET_TUNNEL(a)->tun_id);
2561 case OFPACT_SET_QUEUE:
2562 xlate_set_queue_action(ctx, ofpact_get_SET_QUEUE(a)->queue_id);
2565 case OFPACT_POP_QUEUE:
2566 flow->skb_priority = ctx->orig_skb_priority;
2569 case OFPACT_REG_MOVE:
2570 nxm_execute_reg_move(ofpact_get_REG_MOVE(a), flow, wc);
2573 case OFPACT_REG_LOAD:
2574 nxm_execute_reg_load(ofpact_get_REG_LOAD(a), flow, wc);
2577 case OFPACT_SET_FIELD:
2578 set_field = ofpact_get_SET_FIELD(a);
2579 mf = set_field->field;
2580 mf_mask_field_and_prereqs(mf, &wc->masks);
2582 /* Set field action only ever overwrites packet's outermost
2583 * applicable header fields. Do nothing if no header exists. */
2584 if ((mf->id != MFF_VLAN_VID || flow->vlan_tci & htons(VLAN_CFI))
2585 && ((mf->id != MFF_MPLS_LABEL && mf->id != MFF_MPLS_TC)
2586 || flow->mpls_lse)) {
2587 mf_set_flow_value(mf, &set_field->value, flow);
2591 case OFPACT_STACK_PUSH:
2592 nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), flow, wc,
2596 case OFPACT_STACK_POP:
2597 nxm_execute_stack_pop(ofpact_get_STACK_POP(a), flow, wc,
2601 case OFPACT_PUSH_MPLS:
2602 if (compose_mpls_push_action(ctx,
2603 ofpact_get_PUSH_MPLS(a)->ethertype)) {
2608 case OFPACT_POP_MPLS:
2609 if (compose_mpls_pop_action(ctx,
2610 ofpact_get_POP_MPLS(a)->ethertype)) {
2615 case OFPACT_SET_MPLS_LABEL:
2616 if (compose_set_mpls_label_action(ctx,
2617 ofpact_get_SET_MPLS_LABEL(a)->label)) {
2622 case OFPACT_SET_MPLS_TC:
2623 if (compose_set_mpls_tc_action(ctx,
2624 ofpact_get_SET_MPLS_TC(a)->tc)) {
2629 case OFPACT_SET_MPLS_TTL:
2630 if (compose_set_mpls_ttl_action(ctx,
2631 ofpact_get_SET_MPLS_TTL(a)->ttl)) {
2636 case OFPACT_DEC_MPLS_TTL:
2637 if (compose_dec_mpls_ttl_action(ctx)) {
2642 case OFPACT_DEC_TTL:
2643 wc->masks.nw_ttl = 0xff;
2644 if (compose_dec_ttl(ctx, ofpact_get_DEC_TTL(a))) {
2650 /* Nothing to do. */
2653 case OFPACT_MULTIPATH:
2654 multipath_execute(ofpact_get_MULTIPATH(a), flow, wc);
2658 xlate_bundle_action(ctx, ofpact_get_BUNDLE(a));
2661 case OFPACT_OUTPUT_REG:
2662 xlate_output_reg_action(ctx, ofpact_get_OUTPUT_REG(a));
2666 xlate_learn_action(ctx, ofpact_get_LEARN(a));
2673 case OFPACT_FIN_TIMEOUT:
2674 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2675 ctx->xout->has_fin_timeout = true;
2676 xlate_fin_timeout(ctx, ofpact_get_FIN_TIMEOUT(a));
2679 case OFPACT_CLEAR_ACTIONS:
2680 ofpbuf_clear(&ctx->action_set);
2683 case OFPACT_WRITE_ACTIONS:
2684 xlate_write_actions(ctx, a);
2687 case OFPACT_WRITE_METADATA:
2688 metadata = ofpact_get_WRITE_METADATA(a);
2689 flow->metadata &= ~metadata->mask;
2690 flow->metadata |= metadata->metadata & metadata->mask;
2694 /* Not implemented yet. */
2697 case OFPACT_GOTO_TABLE: {
2698 struct ofpact_goto_table *ogt = ofpact_get_GOTO_TABLE(a);
2700 ovs_assert(ctx->table_id < ogt->table_id);
2701 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
2702 ogt->table_id, true);
2707 xlate_sample_action(ctx, ofpact_get_SAMPLE(a));
2714 xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto,
2715 const struct flow *flow, struct rule_dpif *rule,
2716 uint16_t tcp_flags, const struct ofpbuf *packet)
2718 xin->ofproto = ofproto;
2720 xin->packet = packet;
2721 xin->may_learn = packet != NULL;
2723 xin->ofpacts = NULL;
2724 xin->ofpacts_len = 0;
2725 xin->tcp_flags = tcp_flags;
2726 xin->resubmit_hook = NULL;
2727 xin->report_hook = NULL;
2728 xin->resubmit_stats = NULL;
2732 xlate_out_uninit(struct xlate_out *xout)
2735 ofpbuf_uninit(&xout->odp_actions);
2739 /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts'
2740 * into datapath actions, using 'ctx', and discards the datapath actions. */
2742 xlate_actions_for_side_effects(struct xlate_in *xin)
2744 struct xlate_out xout;
2746 xlate_actions(xin, &xout);
2747 xlate_out_uninit(&xout);
2751 xlate_report(struct xlate_ctx *ctx, const char *s)
2753 if (ctx->xin->report_hook) {
2754 ctx->xin->report_hook(ctx->xin, s, ctx->recurse);
2759 xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src)
2762 dst->slow = src->slow;
2763 dst->has_learn = src->has_learn;
2764 dst->has_normal = src->has_normal;
2765 dst->has_fin_timeout = src->has_fin_timeout;
2766 dst->nf_output_iface = src->nf_output_iface;
2767 dst->mirrors = src->mirrors;
2769 ofpbuf_use_stub(&dst->odp_actions, dst->odp_actions_stub,
2770 sizeof dst->odp_actions_stub);
2771 ofpbuf_put(&dst->odp_actions, src->odp_actions.data,
2772 src->odp_actions.size);
2775 /* Returns a reference to the sflow handled associated with ofproto, or NULL if
2776 * there is none. The caller is responsible for decrementing the results ref
2777 * count with dpif_sflow_unref(). */
2779 xlate_get_sflow(const struct ofproto_dpif *ofproto)
2781 struct dpif_sflow *sflow = NULL;
2782 struct xbridge *xbridge;
2784 ovs_rwlock_rdlock(&xlate_rwlock);
2785 xbridge = xbridge_lookup(ofproto);
2787 sflow = dpif_sflow_ref(xbridge->sflow);
2789 ovs_rwlock_unlock(&xlate_rwlock);
2794 /* Returns a reference to the ipfix handled associated with ofproto, or NULL if
2795 * there is none. The caller is responsible for decrementing the results ref
2796 * count with dpif_ipfix_unref(). */
2798 xlate_get_ipfix(const struct ofproto_dpif *ofproto)
2800 struct dpif_ipfix *ipfix = NULL;
2801 struct xbridge *xbridge;
2803 ovs_rwlock_rdlock(&xlate_rwlock);
2804 xbridge = xbridge_lookup(ofproto);
2806 ipfix = dpif_ipfix_ref(xbridge->ipfix);
2808 ovs_rwlock_unlock(&xlate_rwlock);
2813 static struct skb_priority_to_dscp *
2814 get_skb_priority(const struct xport *xport, uint32_t skb_priority)
2816 struct skb_priority_to_dscp *pdscp;
2819 hash = hash_int(skb_priority, 0);
2820 HMAP_FOR_EACH_IN_BUCKET (pdscp, hmap_node, hash, &xport->skb_priorities) {
2821 if (pdscp->skb_priority == skb_priority) {
2829 dscp_from_skb_priority(const struct xport *xport, uint32_t skb_priority,
2832 struct skb_priority_to_dscp *pdscp = get_skb_priority(xport, skb_priority);
2833 *dscp = pdscp ? pdscp->dscp : 0;
2834 return pdscp != NULL;
2838 clear_skb_priorities(struct xport *xport)
2840 struct skb_priority_to_dscp *pdscp, *next;
2842 HMAP_FOR_EACH_SAFE (pdscp, next, hmap_node, &xport->skb_priorities) {
2843 hmap_remove(&xport->skb_priorities, &pdscp->hmap_node);
2849 actions_output_to_local_port(const struct xlate_ctx *ctx)
2851 odp_port_t local_odp_port = ofp_port_to_odp_port(ctx->xbridge, OFPP_LOCAL);
2852 const struct nlattr *a;
2855 NL_ATTR_FOR_EACH_UNSAFE (a, left, ctx->xout->odp_actions.data,
2856 ctx->xout->odp_actions.size) {
2857 if (nl_attr_type(a) == OVS_ACTION_ATTR_OUTPUT
2858 && nl_attr_get_odp_port(a) == local_odp_port) {
2865 /* Thread safe call to xlate_actions__(). */
2867 xlate_actions(struct xlate_in *xin, struct xlate_out *xout)
2869 ovs_rwlock_rdlock(&xlate_rwlock);
2870 xlate_actions__(xin, xout);
2871 ovs_rwlock_unlock(&xlate_rwlock);
2874 /* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts'
2875 * into datapath actions in 'odp_actions', using 'ctx'.
2877 * The caller must take responsibility for eventually freeing 'xout', with
2878 * xlate_out_uninit(). */
2880 xlate_actions__(struct xlate_in *xin, struct xlate_out *xout)
2881 OVS_REQ_RDLOCK(xlate_rwlock)
2883 struct flow_wildcards *wc = &xout->wc;
2884 struct flow *flow = &xin->flow;
2885 struct rule_dpif *rule = NULL;
2887 struct rule_actions *actions = NULL;
2888 enum slow_path_reason special;
2889 const struct ofpact *ofpacts;
2890 struct xport *in_port;
2891 struct flow orig_flow;
2892 struct xlate_ctx ctx;
2896 COVERAGE_INC(xlate_actions);
2898 /* Flow initialization rules:
2899 * - 'base_flow' must match the kernel's view of the packet at the
2900 * time that action processing starts. 'flow' represents any
2901 * transformations we wish to make through actions.
2902 * - By default 'base_flow' and 'flow' are the same since the input
2903 * packet matches the output before any actions are applied.
2904 * - When using VLAN splinters, 'base_flow''s VLAN is set to the value
2905 * of the received packet as seen by the kernel. If we later output
2906 * to another device without any modifications this will cause us to
2907 * insert a new tag since the original one was stripped off by the
2909 * - Tunnel metadata as received is retained in 'flow'. This allows
2910 * tunnel metadata matching also in later tables.
2911 * Since a kernel action for setting the tunnel metadata will only be
2912 * generated with actual tunnel output, changing the tunnel metadata
2913 * values in 'flow' (such as tun_id) will only have effect with a later
2914 * tunnel output action.
2915 * - Tunnel 'base_flow' is completely cleared since that is what the
2916 * kernel does. If we wish to maintain the original values an action
2917 * needs to be generated. */
2922 ctx.xout->has_learn = false;
2923 ctx.xout->has_normal = false;
2924 ctx.xout->has_fin_timeout = false;
2925 ctx.xout->nf_output_iface = NF_OUT_DROP;
2926 ctx.xout->mirrors = 0;
2927 ofpbuf_use_stub(&ctx.xout->odp_actions, ctx.xout->odp_actions_stub,
2928 sizeof ctx.xout->odp_actions_stub);
2929 ofpbuf_reserve(&ctx.xout->odp_actions, NL_A_U32_SIZE);
2931 ctx.xbridge = xbridge_lookup(xin->ofproto);
2936 ctx.rule = xin->rule;
2938 ctx.base_flow = *flow;
2939 memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel);
2940 ctx.orig_tunnel_ip_dst = flow->tunnel.ip_dst;
2942 flow_wildcards_init_catchall(wc);
2943 memset(&wc->masks.in_port, 0xff, sizeof wc->masks.in_port);
2944 memset(&wc->masks.skb_priority, 0xff, sizeof wc->masks.skb_priority);
2945 memset(&wc->masks.dl_type, 0xff, sizeof wc->masks.dl_type);
2946 wc->masks.nw_frag |= FLOW_NW_FRAG_MASK;
2948 tnl_may_send = tnl_xlate_init(&ctx.base_flow, flow, wc);
2949 if (ctx.xbridge->has_netflow) {
2950 netflow_mask_wc(flow, wc);
2955 ctx.orig_skb_priority = flow->skb_priority;
2958 ctx.mpls_depth_delta = 0;
2960 if (!xin->ofpacts && !ctx.rule) {
2961 rule_dpif_lookup(ctx.xbridge->ofproto, flow, wc, &rule);
2962 if (ctx.xin->resubmit_stats) {
2963 rule_dpif_credit_stats(rule, ctx.xin->resubmit_stats);
2967 xout->fail_open = ctx.rule && rule_dpif_is_fail_open(ctx.rule);
2970 ofpacts = xin->ofpacts;
2971 ofpacts_len = xin->ofpacts_len;
2972 } else if (ctx.rule) {
2973 actions = rule_dpif_get_actions(ctx.rule);
2974 ofpacts = actions->ofpacts;
2975 ofpacts_len = actions->ofpacts_len;
2980 ofpbuf_use_stub(&ctx.stack, ctx.init_stack, sizeof ctx.init_stack);
2981 ofpbuf_use_stub(&ctx.action_set,
2982 ctx.action_set_stub, sizeof ctx.action_set_stub);
2984 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
2985 /* Do this conditionally because the copy is expensive enough that it
2986 * shows up in profiles. */
2990 if (flow->nw_frag & FLOW_NW_FRAG_ANY) {
2991 switch (ctx.xbridge->frag) {
2992 case OFPC_FRAG_NORMAL:
2993 /* We must pretend that transport ports are unavailable. */
2994 flow->tp_src = ctx.base_flow.tp_src = htons(0);
2995 flow->tp_dst = ctx.base_flow.tp_dst = htons(0);
2998 case OFPC_FRAG_DROP:
3001 case OFPC_FRAG_REASM:
3004 case OFPC_FRAG_NX_MATCH:
3005 /* Nothing to do. */
3008 case OFPC_INVALID_TTL_TO_CONTROLLER:
3013 in_port = get_ofp_port(ctx.xbridge, flow->in_port.ofp_port);
3014 special = process_special(&ctx, flow, in_port, ctx.xin->packet);
3016 ctx.xout->slow |= special;
3018 size_t sample_actions_len;
3020 if (flow->in_port.ofp_port
3021 != vsp_realdev_to_vlandev(ctx.xbridge->ofproto,
3022 flow->in_port.ofp_port,
3024 ctx.base_flow.vlan_tci = 0;
3027 add_sflow_action(&ctx);
3028 add_ipfix_action(&ctx);
3029 sample_actions_len = ctx.xout->odp_actions.size;
3031 if (tnl_may_send && (!in_port || may_receive(in_port, &ctx))) {
3032 do_xlate_actions(ofpacts, ofpacts_len, &ctx);
3034 /* We've let OFPP_NORMAL and the learning action look at the
3035 * packet, so drop it now if forwarding is disabled. */
3036 if (in_port && !xport_stp_forward_state(in_port)) {
3037 ctx.xout->odp_actions.size = sample_actions_len;
3041 if (ctx.action_set.size) {
3042 xlate_action_set(&ctx);
3045 if (ctx.xbridge->has_in_band
3046 && in_band_must_output_to_local_port(flow)
3047 && !actions_output_to_local_port(&ctx)) {
3048 compose_output_action(&ctx, OFPP_LOCAL);
3051 fix_sflow_action(&ctx);
3053 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
3054 add_mirror_actions(&ctx, &orig_flow);
3058 if (nl_attr_oversized(ctx.xout->odp_actions.size)) {
3059 /* These datapath actions are too big for a Netlink attribute, so we
3060 * can't hand them to the kernel directly. dpif_execute() can execute
3061 * them one by one with help, so just mark the result as SLOW_ACTION to
3062 * prevent the flow from being installed. */
3063 COVERAGE_INC(xlate_actions_oversize);
3064 ctx.xout->slow |= SLOW_ACTION;
3067 ofpbuf_uninit(&ctx.stack);
3068 ofpbuf_uninit(&ctx.action_set);
3070 /* Clear the metadata and register wildcard masks, because we won't
3071 * use non-header fields as part of the cache. */
3072 memset(&wc->masks.metadata, 0, sizeof wc->masks.metadata);
3073 memset(&wc->masks.regs, 0, sizeof wc->masks.regs);
3076 rule_actions_unref(actions);
3077 rule_dpif_unref(rule);
3080 /* Sends 'packet' out 'ofport'.
3081 * May modify 'packet'.
3082 * Returns 0 if successful, otherwise a positive errno value. */
3084 xlate_send_packet(const struct ofport_dpif *ofport, struct ofpbuf *packet)
3086 struct xport *xport;
3087 struct ofpact_output output;
3089 union flow_in_port in_port_;
3092 ofpact_init(&output.ofpact, OFPACT_OUTPUT, sizeof output);
3093 /* Use OFPP_NONE as the in_port to avoid special packet processing. */
3094 in_port_.ofp_port = OFPP_NONE;
3095 flow_extract(packet, 0, 0, NULL, &in_port_, &flow);
3097 ovs_rwlock_rdlock(&xlate_rwlock);
3098 xport = xport_lookup(ofport);
3100 ovs_rwlock_unlock(&xlate_rwlock);
3103 output.port = xport->ofp_port;
3105 error = ofproto_dpif_execute_actions(xport->xbridge->ofproto, &flow, NULL,
3106 &output.ofpact, sizeof output,
3108 ovs_rwlock_unlock(&xlate_rwlock);