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"
50 COVERAGE_DEFINE(xlate_actions);
52 VLOG_DEFINE_THIS_MODULE(ofproto_dpif_xlate);
54 /* Maximum depth of flow table recursion (due to resubmit actions) in a
55 * flow translation. */
56 #define MAX_RESUBMIT_RECURSION 64
58 struct ovs_rwlock xlate_rwlock = OVS_RWLOCK_INITIALIZER;
61 struct hmap_node hmap_node; /* Node in global 'xbridges' map. */
62 struct ofproto_dpif *ofproto; /* Key in global 'xbridges' map. */
64 struct list xbundles; /* Owned xbundles. */
65 struct hmap xports; /* Indexed by ofp_port. */
67 char *name; /* Name used in log messages. */
68 struct dpif *dpif; /* Datapath interface. */
69 struct mac_learning *ml; /* Mac learning handle. */
70 struct mbridge *mbridge; /* Mirroring. */
71 struct dpif_sflow *sflow; /* SFlow handle, or null. */
72 struct dpif_ipfix *ipfix; /* Ipfix handle, or null. */
73 struct stp *stp; /* STP or null if disabled. */
75 /* Special rules installed by ofproto-dpif. */
76 struct rule_dpif *miss_rule;
77 struct rule_dpif *no_packet_in_rule;
79 enum ofp_config_flags frag; /* Fragmentation handling. */
80 bool has_netflow; /* Bridge runs netflow? */
81 bool has_in_band; /* Bridge has in band control? */
82 bool forward_bpdu; /* Bridge forwards STP BPDUs? */
86 struct hmap_node hmap_node; /* In global 'xbundles' map. */
87 struct ofbundle *ofbundle; /* Key in global 'xbundles' map. */
89 struct list list_node; /* In parent 'xbridges' list. */
90 struct xbridge *xbridge; /* Parent xbridge. */
92 struct list xports; /* Contains "struct xport"s. */
94 char *name; /* Name used in log messages. */
95 struct bond *bond; /* Nonnull iff more than one port. */
96 struct lacp *lacp; /* LACP handle or null. */
98 enum port_vlan_mode vlan_mode; /* VLAN mode. */
99 int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */
100 unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1.
101 * NULL if all VLANs are trunked. */
102 bool use_priority_tags; /* Use 802.1p tag for frames in VLAN 0? */
103 bool floodable; /* No port has OFPUTIL_PC_NO_FLOOD set? */
107 struct hmap_node hmap_node; /* Node in global 'xports' map. */
108 struct ofport_dpif *ofport; /* Key in global 'xports map. */
110 struct hmap_node ofp_node; /* Node in parent xbridge 'xports' map. */
111 ofp_port_t ofp_port; /* Key in parent xbridge 'xports' map. */
113 odp_port_t odp_port; /* Datapath port number or ODPP_NONE. */
115 struct list bundle_node; /* In parent xbundle (if it exists). */
116 struct xbundle *xbundle; /* Parent xbundle or null. */
118 struct netdev *netdev; /* 'ofport''s netdev. */
120 struct xbridge *xbridge; /* Parent bridge. */
121 struct xport *peer; /* Patch port peer or null. */
123 enum ofputil_port_config config; /* OpenFlow port configuration. */
124 int stp_port_no; /* STP port number or 0 if not in use. */
126 struct hmap skb_priorities; /* Map of 'skb_priority_to_dscp's. */
128 bool may_enable; /* May be enabled in bonds. */
129 bool is_tunnel; /* Is a tunnel port. */
131 struct cfm *cfm; /* CFM handle or null. */
132 struct bfd *bfd; /* BFD handle or null. */
136 struct xlate_in *xin;
137 struct xlate_out *xout;
139 const struct xbridge *xbridge;
141 /* Flow at the last commit. */
142 struct flow base_flow;
144 /* Tunnel IP destination address as received. This is stored separately
145 * as the base_flow.tunnel is cleared on init to reflect the datapath
146 * behavior. Used to make sure not to send tunneled output to ourselves,
147 * which might lead to an infinite loop. This could happen easily
148 * if a tunnel is marked as 'ip_remote=flow', and the flow does not
149 * actually set the tun_dst field. */
150 ovs_be32 orig_tunnel_ip_dst;
152 /* Stack for the push and pop actions. Each stack element is of type
153 * "union mf_subvalue". */
154 union mf_subvalue init_stack[1024 / sizeof(union mf_subvalue)];
157 /* The rule that we are currently translating, or NULL. */
158 struct rule_dpif *rule;
160 int recurse; /* Recursion level, via xlate_table_action. */
161 uint32_t orig_skb_priority; /* Priority when packet arrived. */
162 uint8_t table_id; /* OpenFlow table ID where flow was found. */
163 uint32_t sflow_n_outputs; /* Number of output ports. */
164 odp_port_t sflow_odp_port; /* Output port for composing sFlow action. */
165 uint16_t user_cookie_offset;/* Used for user_action_cookie fixup. */
166 bool exit; /* No further actions should be processed. */
169 /* A controller may use OFPP_NONE as the ingress port to indicate that
170 * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for
171 * when an input bundle is needed for validation (e.g., mirroring or
172 * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have
173 * any 'port' structs, so care must be taken when dealing with it.
174 * The bundle's name and vlan mode are initialized in lookup_input_bundle() */
175 static struct xbundle ofpp_none_bundle;
177 /* Node in 'xport''s 'skb_priorities' map. Used to maintain a map from
178 * 'priority' (the datapath's term for QoS queue) to the dscp bits which all
179 * traffic egressing the 'ofport' with that priority should be marked with. */
180 struct skb_priority_to_dscp {
181 struct hmap_node hmap_node; /* Node in 'ofport_dpif''s 'skb_priorities'. */
182 uint32_t skb_priority; /* Priority of this queue (see struct flow). */
184 uint8_t dscp; /* DSCP bits to mark outgoing traffic with. */
187 static struct hmap xbridges = HMAP_INITIALIZER(&xbridges);
188 static struct hmap xbundles = HMAP_INITIALIZER(&xbundles);
189 static struct hmap xports = HMAP_INITIALIZER(&xports);
191 static bool may_receive(const struct xport *, struct xlate_ctx *);
192 static void do_xlate_actions(const struct ofpact *, size_t ofpacts_len,
194 static void xlate_normal(struct xlate_ctx *);
195 static void xlate_report(struct xlate_ctx *, const char *);
196 static void xlate_table_action(struct xlate_ctx *, ofp_port_t in_port,
197 uint8_t table_id, bool may_packet_in);
198 static bool input_vid_is_valid(uint16_t vid, struct xbundle *, bool warn);
199 static uint16_t input_vid_to_vlan(const struct xbundle *, uint16_t vid);
200 static void output_normal(struct xlate_ctx *, const struct xbundle *,
202 static void compose_output_action(struct xlate_ctx *, ofp_port_t ofp_port);
204 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
206 static struct xbridge *xbridge_lookup(const struct ofproto_dpif *);
207 static struct xbundle *xbundle_lookup(const struct ofbundle *);
208 static struct xport *xport_lookup(const struct ofport_dpif *);
209 static struct xport *get_ofp_port(const struct xbridge *, ofp_port_t ofp_port);
210 static struct skb_priority_to_dscp *get_skb_priority(const struct xport *,
211 uint32_t skb_priority);
212 static void clear_skb_priorities(struct xport *);
213 static bool dscp_from_skb_priority(const struct xport *, uint32_t skb_priority,
217 xlate_ofproto_set(struct ofproto_dpif *ofproto, const char *name,
218 struct dpif *dpif, struct rule_dpif *miss_rule,
219 struct rule_dpif *no_packet_in_rule,
220 const struct mac_learning *ml, struct stp *stp,
221 const struct mbridge *mbridge,
222 const struct dpif_sflow *sflow,
223 const struct dpif_ipfix *ipfix, enum ofp_config_flags frag,
224 bool forward_bpdu, bool has_in_band, bool has_netflow)
226 struct xbridge *xbridge = xbridge_lookup(ofproto);
229 xbridge = xzalloc(sizeof *xbridge);
230 xbridge->ofproto = ofproto;
232 hmap_insert(&xbridges, &xbridge->hmap_node, hash_pointer(ofproto, 0));
233 hmap_init(&xbridge->xports);
234 list_init(&xbridge->xbundles);
237 if (xbridge->ml != ml) {
238 mac_learning_unref(xbridge->ml);
239 xbridge->ml = mac_learning_ref(ml);
242 if (xbridge->mbridge != mbridge) {
243 mbridge_unref(xbridge->mbridge);
244 xbridge->mbridge = mbridge_ref(mbridge);
247 if (xbridge->sflow != sflow) {
248 dpif_sflow_unref(xbridge->sflow);
249 xbridge->sflow = dpif_sflow_ref(sflow);
252 if (xbridge->ipfix != ipfix) {
253 dpif_ipfix_unref(xbridge->ipfix);
254 xbridge->ipfix = dpif_ipfix_ref(ipfix);
257 if (xbridge->stp != stp) {
258 stp_unref(xbridge->stp);
259 xbridge->stp = stp_ref(stp);
263 xbridge->name = xstrdup(name);
265 xbridge->dpif = dpif;
266 xbridge->forward_bpdu = forward_bpdu;
267 xbridge->has_in_band = has_in_band;
268 xbridge->has_netflow = has_netflow;
269 xbridge->frag = frag;
270 xbridge->miss_rule = miss_rule;
271 xbridge->no_packet_in_rule = no_packet_in_rule;
275 xlate_remove_ofproto(struct ofproto_dpif *ofproto)
277 struct xbridge *xbridge = xbridge_lookup(ofproto);
278 struct xbundle *xbundle, *next_xbundle;
279 struct xport *xport, *next_xport;
285 HMAP_FOR_EACH_SAFE (xport, next_xport, ofp_node, &xbridge->xports) {
286 xlate_ofport_remove(xport->ofport);
289 LIST_FOR_EACH_SAFE (xbundle, next_xbundle, list_node, &xbridge->xbundles) {
290 xlate_bundle_remove(xbundle->ofbundle);
293 hmap_remove(&xbridges, &xbridge->hmap_node);
299 xlate_bundle_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
300 const char *name, enum port_vlan_mode vlan_mode, int vlan,
301 unsigned long *trunks, bool use_priority_tags,
302 const struct bond *bond, const struct lacp *lacp,
305 struct xbundle *xbundle = xbundle_lookup(ofbundle);
308 xbundle = xzalloc(sizeof *xbundle);
309 xbundle->ofbundle = ofbundle;
310 xbundle->xbridge = xbridge_lookup(ofproto);
312 hmap_insert(&xbundles, &xbundle->hmap_node, hash_pointer(ofbundle, 0));
313 list_insert(&xbundle->xbridge->xbundles, &xbundle->list_node);
314 list_init(&xbundle->xports);
317 ovs_assert(xbundle->xbridge);
320 xbundle->name = xstrdup(name);
322 xbundle->vlan_mode = vlan_mode;
323 xbundle->vlan = vlan;
324 xbundle->trunks = trunks;
325 xbundle->use_priority_tags = use_priority_tags;
326 xbundle->floodable = floodable;
328 if (xbundle->bond != bond) {
329 bond_unref(xbundle->bond);
330 xbundle->bond = bond_ref(bond);
333 if (xbundle->lacp != lacp) {
334 lacp_unref(xbundle->lacp);
335 xbundle->lacp = lacp_ref(lacp);
340 xlate_bundle_remove(struct ofbundle *ofbundle)
342 struct xbundle *xbundle = xbundle_lookup(ofbundle);
343 struct xport *xport, *next;
349 LIST_FOR_EACH_SAFE (xport, next, bundle_node, &xbundle->xports) {
350 list_remove(&xport->bundle_node);
351 xport->xbundle = NULL;
354 hmap_remove(&xbundles, &xbundle->hmap_node);
355 list_remove(&xbundle->list_node);
356 bond_unref(xbundle->bond);
357 lacp_unref(xbundle->lacp);
363 xlate_ofport_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
364 struct ofport_dpif *ofport, ofp_port_t ofp_port,
365 odp_port_t odp_port, const struct netdev *netdev,
366 const struct cfm *cfm, const struct bfd *bfd,
367 struct ofport_dpif *peer, int stp_port_no,
368 const struct ofproto_port_queue *qdscp_list, size_t n_qdscp,
369 enum ofputil_port_config config, bool is_tunnel,
372 struct xport *xport = xport_lookup(ofport);
376 xport = xzalloc(sizeof *xport);
377 xport->ofport = ofport;
378 xport->xbridge = xbridge_lookup(ofproto);
379 xport->ofp_port = ofp_port;
381 hmap_init(&xport->skb_priorities);
382 hmap_insert(&xports, &xport->hmap_node, hash_pointer(ofport, 0));
383 hmap_insert(&xport->xbridge->xports, &xport->ofp_node,
384 hash_ofp_port(xport->ofp_port));
387 ovs_assert(xport->ofp_port == ofp_port);
389 xport->config = config;
390 xport->stp_port_no = stp_port_no;
391 xport->is_tunnel = is_tunnel;
392 xport->may_enable = may_enable;
393 xport->odp_port = odp_port;
395 if (xport->netdev != netdev) {
396 netdev_close(xport->netdev);
397 xport->netdev = netdev_ref(netdev);
400 if (xport->cfm != cfm) {
401 cfm_unref(xport->cfm);
402 xport->cfm = cfm_ref(cfm);
405 if (xport->bfd != bfd) {
406 bfd_unref(xport->bfd);
407 xport->bfd = bfd_ref(bfd);
411 xport->peer->peer = NULL;
413 xport->peer = xport_lookup(peer);
415 xport->peer->peer = xport;
418 if (xport->xbundle) {
419 list_remove(&xport->bundle_node);
421 xport->xbundle = xbundle_lookup(ofbundle);
422 if (xport->xbundle) {
423 list_insert(&xport->xbundle->xports, &xport->bundle_node);
426 clear_skb_priorities(xport);
427 for (i = 0; i < n_qdscp; i++) {
428 struct skb_priority_to_dscp *pdscp;
429 uint32_t skb_priority;
431 if (dpif_queue_to_priority(xport->xbridge->dpif, qdscp_list[i].queue,
436 pdscp = xmalloc(sizeof *pdscp);
437 pdscp->skb_priority = skb_priority;
438 pdscp->dscp = (qdscp_list[i].dscp << 2) & IP_DSCP_MASK;
439 hmap_insert(&xport->skb_priorities, &pdscp->hmap_node,
440 hash_int(pdscp->skb_priority, 0));
445 xlate_ofport_remove(struct ofport_dpif *ofport)
447 struct xport *xport = xport_lookup(ofport);
454 xport->peer->peer = NULL;
458 if (xport->xbundle) {
459 list_remove(&xport->bundle_node);
462 clear_skb_priorities(xport);
463 hmap_destroy(&xport->skb_priorities);
465 hmap_remove(&xports, &xport->hmap_node);
466 hmap_remove(&xport->xbridge->xports, &xport->ofp_node);
468 netdev_close(xport->netdev);
469 cfm_unref(xport->cfm);
470 bfd_unref(xport->bfd);
474 /* Given a datpath, packet, and flow metadata ('backer', 'packet', and 'key'
475 * respectively), populates 'flow' with the result of odp_flow_key_to_flow().
476 * Optionally, if nonnull, populates 'fitnessp' with the fitness of 'flow' as
477 * returned by odp_flow_key_to_flow(). Also, optionally populates 'ofproto'
478 * with the ofproto_dpif, and 'odp_in_port' with the datapath in_port, that
479 * 'packet' ingressed.
481 * If 'ofproto' is nonnull, requires 'flow''s in_port to exist. Otherwise sets
482 * 'flow''s in_port to OFPP_NONE.
484 * This function does post-processing on data returned from
485 * odp_flow_key_to_flow() to help make VLAN splinters transparent to the rest
486 * of the upcall processing logic. In particular, if the extracted in_port is
487 * a VLAN splinter port, it replaces flow->in_port by the "real" port, sets
488 * flow->vlan_tci correctly for the VLAN of the VLAN splinter port, and pushes
489 * a VLAN header onto 'packet' (if it is nonnull).
491 * Similarly, this function also includes some logic to help with tunnels. It
492 * may modify 'flow' as necessary to make the tunneling implementation
493 * transparent to the upcall processing logic.
495 * Returns 0 if successful, ENODEV if the parsed flow has no associated ofport,
496 * or some other positive errno if there are other problems. */
498 xlate_receive(const struct dpif_backer *backer, struct ofpbuf *packet,
499 const struct nlattr *key, size_t key_len,
500 struct flow *flow, enum odp_key_fitness *fitnessp,
501 struct ofproto_dpif **ofproto, odp_port_t *odp_in_port)
503 enum odp_key_fitness fitness;
504 const struct xport *xport;
507 ovs_rwlock_rdlock(&xlate_rwlock);
508 fitness = odp_flow_key_to_flow(key, key_len, flow);
509 if (fitness == ODP_FIT_ERROR) {
515 *odp_in_port = flow->in_port.odp_port;
518 xport = xport_lookup(tnl_port_should_receive(flow)
519 ? tnl_port_receive(flow)
520 : odp_port_to_ofport(backer, flow->in_port.odp_port));
522 flow->in_port.ofp_port = xport ? xport->ofp_port : OFPP_NONE;
527 if (vsp_adjust_flow(xport->xbridge->ofproto, flow)) {
529 /* Make the packet resemble the flow, so that it gets sent to
530 * an OpenFlow controller properly, so that it looks correct
531 * for sFlow, and so that flow_extract() will get the correct
532 * vlan_tci if it is called on 'packet'.
534 * The allocated space inside 'packet' probably also contains
535 * 'key', that is, both 'packet' and 'key' are probably part of
536 * a struct dpif_upcall (see the large comment on that
537 * structure definition), so pushing data on 'packet' is in
538 * general not a good idea since it could overwrite 'key' or
539 * free it as a side effect. However, it's OK in this special
540 * case because we know that 'packet' is inside a Netlink
541 * attribute: pushing 4 bytes will just overwrite the 4-byte
542 * "struct nlattr", which is fine since we don't need that
544 eth_push_vlan(packet, flow->vlan_tci);
546 /* We can't reproduce 'key' from 'flow'. */
547 fitness = fitness == ODP_FIT_PERFECT ? ODP_FIT_TOO_MUCH : fitness;
552 *ofproto = xport->xbridge->ofproto;
559 ovs_rwlock_unlock(&xlate_rwlock);
563 static struct xbridge *
564 xbridge_lookup(const struct ofproto_dpif *ofproto)
566 struct xbridge *xbridge;
572 HMAP_FOR_EACH_IN_BUCKET (xbridge, hmap_node, hash_pointer(ofproto, 0),
574 if (xbridge->ofproto == ofproto) {
581 static struct xbundle *
582 xbundle_lookup(const struct ofbundle *ofbundle)
584 struct xbundle *xbundle;
590 HMAP_FOR_EACH_IN_BUCKET (xbundle, hmap_node, hash_pointer(ofbundle, 0),
592 if (xbundle->ofbundle == ofbundle) {
599 static struct xport *
600 xport_lookup(const struct ofport_dpif *ofport)
608 HMAP_FOR_EACH_IN_BUCKET (xport, hmap_node, hash_pointer(ofport, 0),
610 if (xport->ofport == ofport) {
617 static struct stp_port *
618 xport_get_stp_port(const struct xport *xport)
620 return xport->xbridge->stp && xport->stp_port_no
621 ? stp_get_port(xport->xbridge->stp, xport->stp_port_no)
625 static enum stp_state
626 xport_stp_learn_state(const struct xport *xport)
628 struct stp_port *sp = xport_get_stp_port(xport);
629 return stp_learn_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
633 xport_stp_forward_state(const struct xport *xport)
635 struct stp_port *sp = xport_get_stp_port(xport);
636 return stp_forward_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
639 /* Returns true if STP should process 'flow'. Sets fields in 'wc' that
640 * were used to make the determination.*/
642 stp_should_process_flow(const struct flow *flow, struct flow_wildcards *wc)
644 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
645 return eth_addr_equals(flow->dl_dst, eth_addr_stp);
649 stp_process_packet(const struct xport *xport, const struct ofpbuf *packet)
651 struct stp_port *sp = xport_get_stp_port(xport);
652 struct ofpbuf payload = *packet;
653 struct eth_header *eth = payload.data;
655 /* Sink packets on ports that have STP disabled when the bridge has
657 if (!sp || stp_port_get_state(sp) == STP_DISABLED) {
661 /* Trim off padding on payload. */
662 if (payload.size > ntohs(eth->eth_type) + ETH_HEADER_LEN) {
663 payload.size = ntohs(eth->eth_type) + ETH_HEADER_LEN;
666 if (ofpbuf_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) {
667 stp_received_bpdu(sp, payload.data, payload.size);
671 static struct xport *
672 get_ofp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
676 HMAP_FOR_EACH_IN_BUCKET (xport, ofp_node, hash_ofp_port(ofp_port),
678 if (xport->ofp_port == ofp_port) {
686 ofp_port_to_odp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
688 const struct xport *xport = get_ofp_port(xbridge, ofp_port);
689 return xport ? xport->odp_port : ODPP_NONE;
693 xbundle_trunks_vlan(const struct xbundle *bundle, uint16_t vlan)
695 return (bundle->vlan_mode != PORT_VLAN_ACCESS
696 && (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan)));
700 xbundle_includes_vlan(const struct xbundle *xbundle, uint16_t vlan)
702 return vlan == xbundle->vlan || xbundle_trunks_vlan(xbundle, vlan);
706 xbundle_mirror_out(const struct xbridge *xbridge, struct xbundle *xbundle)
708 return xbundle != &ofpp_none_bundle
709 ? mirror_bundle_out(xbridge->mbridge, xbundle->ofbundle)
714 xbundle_mirror_src(const struct xbridge *xbridge, struct xbundle *xbundle)
716 return xbundle != &ofpp_none_bundle
717 ? mirror_bundle_src(xbridge->mbridge, xbundle->ofbundle)
722 xbundle_mirror_dst(const struct xbridge *xbridge, struct xbundle *xbundle)
724 return xbundle != &ofpp_none_bundle
725 ? mirror_bundle_dst(xbridge->mbridge, xbundle->ofbundle)
729 static struct xbundle *
730 lookup_input_bundle(const struct xbridge *xbridge, ofp_port_t in_port,
731 bool warn, struct xport **in_xportp)
735 /* Find the port and bundle for the received packet. */
736 xport = get_ofp_port(xbridge, in_port);
740 if (xport && xport->xbundle) {
741 return xport->xbundle;
744 /* Special-case OFPP_NONE, which a controller may use as the ingress
745 * port for traffic that it is sourcing. */
746 if (in_port == OFPP_NONE) {
747 ofpp_none_bundle.name = "OFPP_NONE";
748 ofpp_none_bundle.vlan_mode = PORT_VLAN_TRUNK;
749 return &ofpp_none_bundle;
752 /* Odd. A few possible reasons here:
754 * - We deleted a port but there are still a few packets queued up
757 * - Someone externally added a port (e.g. "ovs-dpctl add-if") that
758 * we don't know about.
760 * - The ofproto client didn't configure the port as part of a bundle.
761 * This is particularly likely to happen if a packet was received on the
762 * port after it was created, but before the client had a chance to
763 * configure its bundle.
766 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
768 VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown "
769 "port %"PRIu16, xbridge->name, in_port);
775 add_mirror_actions(struct xlate_ctx *ctx, const struct flow *orig_flow)
777 const struct xbridge *xbridge = ctx->xbridge;
778 mirror_mask_t mirrors;
779 struct xbundle *in_xbundle;
783 mirrors = ctx->xout->mirrors;
784 ctx->xout->mirrors = 0;
786 in_xbundle = lookup_input_bundle(xbridge, orig_flow->in_port.ofp_port,
787 ctx->xin->packet != NULL, NULL);
791 mirrors |= xbundle_mirror_src(xbridge, in_xbundle);
793 /* Drop frames on bundles reserved for mirroring. */
794 if (xbundle_mirror_out(xbridge, in_xbundle)) {
795 if (ctx->xin->packet != NULL) {
796 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
797 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
798 "%s, which is reserved exclusively for mirroring",
799 ctx->xbridge->name, in_xbundle->name);
801 ofpbuf_clear(&ctx->xout->odp_actions);
806 vid = vlan_tci_to_vid(orig_flow->vlan_tci);
807 if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) {
810 vlan = input_vid_to_vlan(in_xbundle, vid);
816 /* Restore the original packet before adding the mirror actions. */
817 ctx->xin->flow = *orig_flow;
820 mirror_mask_t dup_mirrors;
821 struct ofbundle *out;
822 unsigned long *vlans;
827 has_mirror = mirror_get(xbridge->mbridge, mirror_mask_ffs(mirrors) - 1,
828 &vlans, &dup_mirrors, &out, &out_vlan);
829 ovs_assert(has_mirror);
832 ctx->xout->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK);
834 vlan_mirrored = !vlans || bitmap_is_set(vlans, vlan);
837 if (!vlan_mirrored) {
838 mirrors = zero_rightmost_1bit(mirrors);
842 mirrors &= ~dup_mirrors;
843 ctx->xout->mirrors |= dup_mirrors;
845 struct xbundle *out_xbundle = xbundle_lookup(out);
847 output_normal(ctx, out_xbundle, vlan);
849 } else if (vlan != out_vlan
850 && !eth_addr_is_reserved(orig_flow->dl_dst)) {
851 struct xbundle *xbundle;
853 LIST_FOR_EACH (xbundle, list_node, &xbridge->xbundles) {
854 if (xbundle_includes_vlan(xbundle, out_vlan)
855 && !xbundle_mirror_out(xbridge, xbundle)) {
856 output_normal(ctx, xbundle, out_vlan);
863 /* Given 'vid', the VID obtained from the 802.1Q header that was received as
864 * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle',
865 * the bundle on which the packet was received, returns the VLAN to which the
868 * Both 'vid' and the return value are in the range 0...4095. */
870 input_vid_to_vlan(const struct xbundle *in_xbundle, uint16_t vid)
872 switch (in_xbundle->vlan_mode) {
873 case PORT_VLAN_ACCESS:
874 return in_xbundle->vlan;
877 case PORT_VLAN_TRUNK:
880 case PORT_VLAN_NATIVE_UNTAGGED:
881 case PORT_VLAN_NATIVE_TAGGED:
882 return vid ? vid : in_xbundle->vlan;
889 /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'.
890 * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs
893 * 'vid' should be the VID obtained from the 802.1Q header that was received as
894 * part of a packet (specify 0 if there was no 802.1Q header), in the range
897 input_vid_is_valid(uint16_t vid, struct xbundle *in_xbundle, bool warn)
899 /* Allow any VID on the OFPP_NONE port. */
900 if (in_xbundle == &ofpp_none_bundle) {
904 switch (in_xbundle->vlan_mode) {
905 case PORT_VLAN_ACCESS:
908 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
909 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" tagged "
910 "packet received on port %s configured as VLAN "
911 "%"PRIu16" access port", vid, in_xbundle->name,
918 case PORT_VLAN_NATIVE_UNTAGGED:
919 case PORT_VLAN_NATIVE_TAGGED:
921 /* Port must always carry its native VLAN. */
925 case PORT_VLAN_TRUNK:
926 if (!xbundle_includes_vlan(in_xbundle, vid)) {
928 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
929 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" packet "
930 "received on port %s not configured for trunking "
931 "VLAN %"PRIu16, vid, in_xbundle->name, vid);
943 /* Given 'vlan', the VLAN that a packet belongs to, and
944 * 'out_xbundle', a bundle on which the packet is to be output, returns the VID
945 * that should be included in the 802.1Q header. (If the return value is 0,
946 * then the 802.1Q header should only be included in the packet if there is a
949 * Both 'vlan' and the return value are in the range 0...4095. */
951 output_vlan_to_vid(const struct xbundle *out_xbundle, uint16_t vlan)
953 switch (out_xbundle->vlan_mode) {
954 case PORT_VLAN_ACCESS:
957 case PORT_VLAN_TRUNK:
958 case PORT_VLAN_NATIVE_TAGGED:
961 case PORT_VLAN_NATIVE_UNTAGGED:
962 return vlan == out_xbundle->vlan ? 0 : vlan;
970 output_normal(struct xlate_ctx *ctx, const struct xbundle *out_xbundle,
973 ovs_be16 *flow_tci = &ctx->xin->flow.vlan_tci;
975 ovs_be16 tci, old_tci;
978 vid = output_vlan_to_vid(out_xbundle, vlan);
979 if (list_is_empty(&out_xbundle->xports)) {
980 /* Partially configured bundle with no slaves. Drop the packet. */
982 } else if (!out_xbundle->bond) {
983 xport = CONTAINER_OF(list_front(&out_xbundle->xports), struct xport,
986 struct ofport_dpif *ofport;
988 ofport = bond_choose_output_slave(out_xbundle->bond, &ctx->xin->flow,
989 &ctx->xout->wc, vid);
990 xport = xport_lookup(ofport);
993 /* No slaves enabled, so drop packet. */
1000 if (tci || out_xbundle->use_priority_tags) {
1001 tci |= *flow_tci & htons(VLAN_PCP_MASK);
1003 tci |= htons(VLAN_CFI);
1008 compose_output_action(ctx, xport->ofp_port);
1009 *flow_tci = old_tci;
1012 /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after
1013 * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to
1014 * indicate this; newer upstream kernels use gratuitous ARP requests. */
1016 is_gratuitous_arp(const struct flow *flow, struct flow_wildcards *wc)
1018 if (flow->dl_type != htons(ETH_TYPE_ARP)) {
1022 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1023 if (!eth_addr_is_broadcast(flow->dl_dst)) {
1027 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
1028 if (flow->nw_proto == ARP_OP_REPLY) {
1030 } else if (flow->nw_proto == ARP_OP_REQUEST) {
1031 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
1032 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
1034 return flow->nw_src == flow->nw_dst;
1041 update_learning_table(const struct xbridge *xbridge,
1042 const struct flow *flow, struct flow_wildcards *wc,
1043 int vlan, struct xbundle *in_xbundle)
1045 struct mac_entry *mac;
1047 /* Don't learn the OFPP_NONE port. */
1048 if (in_xbundle == &ofpp_none_bundle) {
1052 ovs_rwlock_wrlock(&xbridge->ml->rwlock);
1053 if (!mac_learning_may_learn(xbridge->ml, flow->dl_src, vlan)) {
1057 mac = mac_learning_insert(xbridge->ml, flow->dl_src, vlan);
1058 if (is_gratuitous_arp(flow, wc)) {
1059 /* We don't want to learn from gratuitous ARP packets that are
1060 * reflected back over bond slaves so we lock the learning table. */
1061 if (!in_xbundle->bond) {
1062 mac_entry_set_grat_arp_lock(mac);
1063 } else if (mac_entry_is_grat_arp_locked(mac)) {
1068 if (mac->port.p != in_xbundle->ofbundle) {
1069 /* The log messages here could actually be useful in debugging,
1070 * so keep the rate limit relatively high. */
1071 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
1072 VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
1073 "on port %s in VLAN %d",
1074 xbridge->name, ETH_ADDR_ARGS(flow->dl_src),
1075 in_xbundle->name, vlan);
1077 mac->port.p = in_xbundle->ofbundle;
1078 mac_learning_changed(xbridge->ml);
1081 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1084 /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or
1085 * dropped. Returns true if they may be forwarded, false if they should be
1088 * 'in_port' must be the xport that corresponds to flow->in_port.
1089 * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull).
1091 * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as
1092 * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as
1093 * checked by input_vid_is_valid().
1095 * May also add tags to '*tags', although the current implementation only does
1096 * so in one special case.
1099 is_admissible(struct xlate_ctx *ctx, struct xport *in_port,
1102 struct xbundle *in_xbundle = in_port->xbundle;
1103 const struct xbridge *xbridge = ctx->xbridge;
1104 struct flow *flow = &ctx->xin->flow;
1106 /* Drop frames for reserved multicast addresses
1107 * only if forward_bpdu option is absent. */
1108 if (!xbridge->forward_bpdu && eth_addr_is_reserved(flow->dl_dst)) {
1109 xlate_report(ctx, "packet has reserved destination MAC, dropping");
1113 if (in_xbundle->bond) {
1114 struct mac_entry *mac;
1116 switch (bond_check_admissibility(in_xbundle->bond, in_port->ofport,
1122 xlate_report(ctx, "bonding refused admissibility, dropping");
1125 case BV_DROP_IF_MOVED:
1126 ovs_rwlock_rdlock(&xbridge->ml->rwlock);
1127 mac = mac_learning_lookup(xbridge->ml, flow->dl_src, vlan);
1128 if (mac && mac->port.p != in_xbundle->ofbundle &&
1129 (!is_gratuitous_arp(flow, &ctx->xout->wc)
1130 || mac_entry_is_grat_arp_locked(mac))) {
1131 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1132 xlate_report(ctx, "SLB bond thinks this packet looped back, "
1136 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1145 xlate_normal(struct xlate_ctx *ctx)
1147 struct flow_wildcards *wc = &ctx->xout->wc;
1148 struct flow *flow = &ctx->xin->flow;
1149 struct xbundle *in_xbundle;
1150 struct xport *in_port;
1151 struct mac_entry *mac;
1155 ctx->xout->has_normal = true;
1157 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
1158 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1159 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
1161 in_xbundle = lookup_input_bundle(ctx->xbridge, flow->in_port.ofp_port,
1162 ctx->xin->packet != NULL, &in_port);
1164 xlate_report(ctx, "no input bundle, dropping");
1168 /* Drop malformed frames. */
1169 if (flow->dl_type == htons(ETH_TYPE_VLAN) &&
1170 !(flow->vlan_tci & htons(VLAN_CFI))) {
1171 if (ctx->xin->packet != NULL) {
1172 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1173 VLOG_WARN_RL(&rl, "bridge %s: dropping packet with partial "
1174 "VLAN tag received on port %s",
1175 ctx->xbridge->name, in_xbundle->name);
1177 xlate_report(ctx, "partial VLAN tag, dropping");
1181 /* Drop frames on bundles reserved for mirroring. */
1182 if (xbundle_mirror_out(ctx->xbridge, in_xbundle)) {
1183 if (ctx->xin->packet != NULL) {
1184 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1185 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
1186 "%s, which is reserved exclusively for mirroring",
1187 ctx->xbridge->name, in_xbundle->name);
1189 xlate_report(ctx, "input port is mirror output port, dropping");
1194 vid = vlan_tci_to_vid(flow->vlan_tci);
1195 if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) {
1196 xlate_report(ctx, "disallowed VLAN VID for this input port, dropping");
1199 vlan = input_vid_to_vlan(in_xbundle, vid);
1201 /* Check other admissibility requirements. */
1202 if (in_port && !is_admissible(ctx, in_port, vlan)) {
1206 /* Learn source MAC. */
1207 if (ctx->xin->may_learn) {
1208 update_learning_table(ctx->xbridge, flow, wc, vlan, in_xbundle);
1211 /* Determine output bundle. */
1212 ovs_rwlock_rdlock(&ctx->xbridge->ml->rwlock);
1213 mac = mac_learning_lookup(ctx->xbridge->ml, flow->dl_dst, vlan);
1215 struct xbundle *mac_xbundle = xbundle_lookup(mac->port.p);
1216 if (mac_xbundle && mac_xbundle != in_xbundle) {
1217 xlate_report(ctx, "forwarding to learned port");
1218 output_normal(ctx, mac_xbundle, vlan);
1219 } else if (!mac_xbundle) {
1220 xlate_report(ctx, "learned port is unknown, dropping");
1222 xlate_report(ctx, "learned port is input port, dropping");
1225 struct xbundle *xbundle;
1227 xlate_report(ctx, "no learned MAC for destination, flooding");
1228 LIST_FOR_EACH (xbundle, list_node, &ctx->xbridge->xbundles) {
1229 if (xbundle != in_xbundle
1230 && xbundle_includes_vlan(xbundle, vlan)
1231 && xbundle->floodable
1232 && !xbundle_mirror_out(ctx->xbridge, xbundle)) {
1233 output_normal(ctx, xbundle, vlan);
1236 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
1238 ovs_rwlock_unlock(&ctx->xbridge->ml->rwlock);
1241 /* Compose SAMPLE action for sFlow or IPFIX. The given probability is
1242 * the number of packets out of UINT32_MAX to sample. The given
1243 * cookie is passed back in the callback for each sampled packet.
1246 compose_sample_action(const struct xbridge *xbridge,
1247 struct ofpbuf *odp_actions,
1248 const struct flow *flow,
1249 const uint32_t probability,
1250 const union user_action_cookie *cookie,
1251 const size_t cookie_size)
1253 size_t sample_offset, actions_offset;
1254 odp_port_t odp_port;
1258 sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE);
1260 nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability);
1262 actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS);
1264 odp_port = ofp_port_to_odp_port(xbridge, flow->in_port.ofp_port);
1265 pid = dpif_port_get_pid(xbridge->dpif, odp_port);
1266 cookie_offset = odp_put_userspace_action(pid, cookie, cookie_size, odp_actions);
1268 nl_msg_end_nested(odp_actions, actions_offset);
1269 nl_msg_end_nested(odp_actions, sample_offset);
1270 return cookie_offset;
1274 compose_sflow_cookie(const struct xbridge *xbridge, ovs_be16 vlan_tci,
1275 odp_port_t odp_port, unsigned int n_outputs,
1276 union user_action_cookie *cookie)
1280 cookie->type = USER_ACTION_COOKIE_SFLOW;
1281 cookie->sflow.vlan_tci = vlan_tci;
1283 /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output
1284 * port information") for the interpretation of cookie->output. */
1285 switch (n_outputs) {
1287 /* 0x40000000 | 256 means "packet dropped for unknown reason". */
1288 cookie->sflow.output = 0x40000000 | 256;
1292 ifindex = dpif_sflow_odp_port_to_ifindex(xbridge->sflow, odp_port);
1294 cookie->sflow.output = ifindex;
1299 /* 0x80000000 means "multiple output ports. */
1300 cookie->sflow.output = 0x80000000 | n_outputs;
1305 /* Compose SAMPLE action for sFlow bridge sampling. */
1307 compose_sflow_action(const struct xbridge *xbridge,
1308 struct ofpbuf *odp_actions,
1309 const struct flow *flow,
1310 odp_port_t odp_port)
1312 uint32_t probability;
1313 union user_action_cookie cookie;
1315 if (!xbridge->sflow || flow->in_port.ofp_port == OFPP_NONE) {
1319 probability = dpif_sflow_get_probability(xbridge->sflow);
1320 compose_sflow_cookie(xbridge, htons(0), odp_port,
1321 odp_port == ODPP_NONE ? 0 : 1, &cookie);
1323 return compose_sample_action(xbridge, odp_actions, flow, probability,
1324 &cookie, sizeof cookie.sflow);
1328 compose_flow_sample_cookie(uint16_t probability, uint32_t collector_set_id,
1329 uint32_t obs_domain_id, uint32_t obs_point_id,
1330 union user_action_cookie *cookie)
1332 cookie->type = USER_ACTION_COOKIE_FLOW_SAMPLE;
1333 cookie->flow_sample.probability = probability;
1334 cookie->flow_sample.collector_set_id = collector_set_id;
1335 cookie->flow_sample.obs_domain_id = obs_domain_id;
1336 cookie->flow_sample.obs_point_id = obs_point_id;
1340 compose_ipfix_cookie(union user_action_cookie *cookie)
1342 cookie->type = USER_ACTION_COOKIE_IPFIX;
1345 /* Compose SAMPLE action for IPFIX bridge sampling. */
1347 compose_ipfix_action(const struct xbridge *xbridge,
1348 struct ofpbuf *odp_actions,
1349 const struct flow *flow)
1351 uint32_t probability;
1352 union user_action_cookie cookie;
1354 if (!xbridge->ipfix || flow->in_port.ofp_port == OFPP_NONE) {
1358 probability = dpif_ipfix_get_bridge_exporter_probability(xbridge->ipfix);
1359 compose_ipfix_cookie(&cookie);
1361 compose_sample_action(xbridge, odp_actions, flow, probability,
1362 &cookie, sizeof cookie.ipfix);
1365 /* SAMPLE action for sFlow must be first action in any given list of
1366 * actions. At this point we do not have all information required to
1367 * build it. So try to build sample action as complete as possible. */
1369 add_sflow_action(struct xlate_ctx *ctx)
1371 ctx->user_cookie_offset = compose_sflow_action(ctx->xbridge,
1372 &ctx->xout->odp_actions,
1373 &ctx->xin->flow, ODPP_NONE);
1374 ctx->sflow_odp_port = 0;
1375 ctx->sflow_n_outputs = 0;
1378 /* SAMPLE action for IPFIX must be 1st or 2nd action in any given list
1379 * of actions, eventually after the SAMPLE action for sFlow. */
1381 add_ipfix_action(struct xlate_ctx *ctx)
1383 compose_ipfix_action(ctx->xbridge, &ctx->xout->odp_actions,
1387 /* Fix SAMPLE action according to data collected while composing ODP actions.
1388 * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested
1389 * USERSPACE action's user-cookie which is required for sflow. */
1391 fix_sflow_action(struct xlate_ctx *ctx)
1393 const struct flow *base = &ctx->base_flow;
1394 union user_action_cookie *cookie;
1396 if (!ctx->user_cookie_offset) {
1400 cookie = ofpbuf_at(&ctx->xout->odp_actions, ctx->user_cookie_offset,
1401 sizeof cookie->sflow);
1402 ovs_assert(cookie->type == USER_ACTION_COOKIE_SFLOW);
1404 compose_sflow_cookie(ctx->xbridge, base->vlan_tci,
1405 ctx->sflow_odp_port, ctx->sflow_n_outputs, cookie);
1408 static enum slow_path_reason
1409 process_special(struct xlate_ctx *ctx, const struct flow *flow,
1410 const struct xport *xport, const struct ofpbuf *packet)
1412 struct flow_wildcards *wc = &ctx->xout->wc;
1413 const struct xbridge *xbridge = ctx->xbridge;
1417 } else if (xport->cfm && cfm_should_process_flow(xport->cfm, flow, wc)) {
1419 cfm_process_heartbeat(xport->cfm, packet);
1422 } else if (xport->bfd && bfd_should_process_flow(xport->bfd, flow, wc)) {
1424 bfd_process_packet(xport->bfd, flow, packet);
1427 } else if (xport->xbundle && xport->xbundle->lacp
1428 && flow->dl_type == htons(ETH_TYPE_LACP)) {
1430 lacp_process_packet(xport->xbundle->lacp, xport->ofport, packet);
1433 } else if (xbridge->stp && stp_should_process_flow(flow, wc)) {
1435 stp_process_packet(xport, packet);
1444 compose_output_action__(struct xlate_ctx *ctx, ofp_port_t ofp_port,
1447 const struct xport *xport = get_ofp_port(ctx->xbridge, ofp_port);
1448 struct flow_wildcards *wc = &ctx->xout->wc;
1449 struct flow *flow = &ctx->xin->flow;
1450 ovs_be16 flow_vlan_tci;
1451 uint32_t flow_skb_mark;
1452 uint8_t flow_nw_tos;
1453 odp_port_t out_port, odp_port;
1456 /* If 'struct flow' gets additional metadata, we'll need to zero it out
1457 * before traversing a patch port. */
1458 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 20);
1461 xlate_report(ctx, "Nonexistent output port");
1463 } else if (xport->config & OFPUTIL_PC_NO_FWD) {
1464 xlate_report(ctx, "OFPPC_NO_FWD set, skipping output");
1466 } else if (check_stp && !xport_stp_forward_state(xport)) {
1467 xlate_report(ctx, "STP not in forwarding state, skipping output");
1471 if (mbridge_has_mirrors(ctx->xbridge->mbridge) && xport->xbundle) {
1472 ctx->xout->mirrors |= xbundle_mirror_dst(xport->xbundle->xbridge,
1477 const struct xport *peer = xport->peer;
1478 struct flow old_flow = ctx->xin->flow;
1479 enum slow_path_reason special;
1481 ctx->xbridge = peer->xbridge;
1482 flow->in_port.ofp_port = peer->ofp_port;
1483 flow->metadata = htonll(0);
1484 memset(&flow->tunnel, 0, sizeof flow->tunnel);
1485 memset(flow->regs, 0, sizeof flow->regs);
1487 special = process_special(ctx, &ctx->xin->flow, peer,
1490 ctx->xout->slow = special;
1491 } else if (may_receive(peer, ctx)) {
1492 if (xport_stp_forward_state(peer)) {
1493 xlate_table_action(ctx, flow->in_port.ofp_port, 0, true);
1495 /* Forwarding is disabled by STP. Let OFPP_NORMAL and the
1496 * learning action look at the packet, then drop it. */
1497 struct flow old_base_flow = ctx->base_flow;
1498 size_t old_size = ctx->xout->odp_actions.size;
1499 mirror_mask_t old_mirrors = ctx->xout->mirrors;
1500 xlate_table_action(ctx, flow->in_port.ofp_port, 0, true);
1501 ctx->xout->mirrors = old_mirrors;
1502 ctx->base_flow = old_base_flow;
1503 ctx->xout->odp_actions.size = old_size;
1507 ctx->xin->flow = old_flow;
1508 ctx->xbridge = xport->xbridge;
1510 if (ctx->xin->resubmit_stats) {
1511 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
1512 netdev_vport_inc_rx(peer->netdev, ctx->xin->resubmit_stats);
1518 flow_vlan_tci = flow->vlan_tci;
1519 flow_skb_mark = flow->skb_mark;
1520 flow_nw_tos = flow->nw_tos;
1522 if (dscp_from_skb_priority(xport, flow->skb_priority, &dscp)) {
1523 wc->masks.nw_tos |= IP_ECN_MASK;
1524 flow->nw_tos &= ~IP_DSCP_MASK;
1525 flow->nw_tos |= dscp;
1528 if (xport->is_tunnel) {
1529 /* Save tunnel metadata so that changes made due to
1530 * the Logical (tunnel) Port are not visible for any further
1531 * matches, while explicit set actions on tunnel metadata are.
1533 struct flow_tnl flow_tnl = flow->tunnel;
1534 odp_port = tnl_port_send(xport->ofport, flow, &ctx->xout->wc);
1535 if (odp_port == ODPP_NONE) {
1536 xlate_report(ctx, "Tunneling decided against output");
1537 goto out; /* restore flow_nw_tos */
1539 if (flow->tunnel.ip_dst == ctx->orig_tunnel_ip_dst) {
1540 xlate_report(ctx, "Not tunneling to our own address");
1541 goto out; /* restore flow_nw_tos */
1543 if (ctx->xin->resubmit_stats) {
1544 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
1546 out_port = odp_port;
1547 commit_odp_tunnel_action(flow, &ctx->base_flow,
1548 &ctx->xout->odp_actions);
1549 flow->tunnel = flow_tnl; /* Restore tunnel metadata */
1551 ofp_port_t vlandev_port;
1553 odp_port = xport->odp_port;
1554 if (ofproto_has_vlan_splinters(ctx->xbridge->ofproto)) {
1555 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
1557 vlandev_port = vsp_realdev_to_vlandev(ctx->xbridge->ofproto, ofp_port,
1559 if (vlandev_port == ofp_port) {
1560 out_port = odp_port;
1562 out_port = ofp_port_to_odp_port(ctx->xbridge, vlandev_port);
1563 flow->vlan_tci = htons(0);
1565 flow->skb_mark &= ~IPSEC_MARK;
1568 if (out_port != ODPP_NONE) {
1569 commit_odp_actions(flow, &ctx->base_flow,
1570 &ctx->xout->odp_actions, &ctx->xout->wc);
1571 nl_msg_put_odp_port(&ctx->xout->odp_actions, OVS_ACTION_ATTR_OUTPUT,
1574 ctx->sflow_odp_port = odp_port;
1575 ctx->sflow_n_outputs++;
1576 ctx->xout->nf_output_iface = ofp_port;
1581 flow->vlan_tci = flow_vlan_tci;
1582 flow->skb_mark = flow_skb_mark;
1583 flow->nw_tos = flow_nw_tos;
1587 compose_output_action(struct xlate_ctx *ctx, ofp_port_t ofp_port)
1589 compose_output_action__(ctx, ofp_port, true);
1592 /* Common rule processing in one place to avoid duplicating code. */
1593 static struct rule_dpif *
1594 ctx_rule_hooks(struct xlate_ctx *ctx, struct rule_dpif *rule,
1597 if (ctx->xin->resubmit_hook) {
1598 ctx->xin->resubmit_hook(ctx->xin, rule, ctx->recurse);
1600 if (rule == NULL && may_packet_in) {
1601 struct xport *xport;
1604 * check if table configuration flags
1605 * OFPTC_TABLE_MISS_CONTROLLER, default.
1606 * OFPTC_TABLE_MISS_CONTINUE,
1607 * OFPTC_TABLE_MISS_DROP
1608 * When OF1.0, OFPTC_TABLE_MISS_CONTINUE is used. What to do? */
1609 xport = get_ofp_port(ctx->xbridge, ctx->xin->flow.in_port.ofp_port);
1610 rule = choose_miss_rule(xport ? xport->config : 0,
1611 ctx->xbridge->miss_rule,
1612 ctx->xbridge->no_packet_in_rule);
1614 if (rule && ctx->xin->resubmit_stats) {
1615 rule_credit_stats(rule, ctx->xin->resubmit_stats);
1621 xlate_table_action(struct xlate_ctx *ctx,
1622 ofp_port_t in_port, uint8_t table_id, bool may_packet_in)
1624 if (ctx->recurse < MAX_RESUBMIT_RECURSION) {
1625 struct rule_dpif *rule;
1626 ofp_port_t old_in_port = ctx->xin->flow.in_port.ofp_port;
1627 uint8_t old_table_id = ctx->table_id;
1629 ctx->table_id = table_id;
1631 /* Look up a flow with 'in_port' as the input port. */
1632 ctx->xin->flow.in_port.ofp_port = in_port;
1633 rule = rule_dpif_lookup_in_table(ctx->xbridge->ofproto,
1634 &ctx->xin->flow, &ctx->xout->wc,
1637 /* Restore the original input port. Otherwise OFPP_NORMAL and
1638 * OFPP_IN_PORT will have surprising behavior. */
1639 ctx->xin->flow.in_port.ofp_port = old_in_port;
1641 rule = ctx_rule_hooks(ctx, rule, may_packet_in);
1644 struct rule_dpif *old_rule = ctx->rule;
1648 do_xlate_actions(rule->up.ofpacts, rule->up.ofpacts_len, ctx);
1649 ctx->rule = old_rule;
1653 ctx->table_id = old_table_id;
1655 static struct vlog_rate_limit recurse_rl = VLOG_RATE_LIMIT_INIT(1, 1);
1657 VLOG_ERR_RL(&recurse_rl, "resubmit actions recursed over %d times",
1658 MAX_RESUBMIT_RECURSION);
1663 xlate_ofpact_resubmit(struct xlate_ctx *ctx,
1664 const struct ofpact_resubmit *resubmit)
1669 in_port = resubmit->in_port;
1670 if (in_port == OFPP_IN_PORT) {
1671 in_port = ctx->xin->flow.in_port.ofp_port;
1674 table_id = resubmit->table_id;
1675 if (table_id == 255) {
1676 table_id = ctx->table_id;
1679 xlate_table_action(ctx, in_port, table_id, false);
1683 flood_packets(struct xlate_ctx *ctx, bool all)
1685 const struct xport *xport;
1687 HMAP_FOR_EACH (xport, ofp_node, &ctx->xbridge->xports) {
1688 if (xport->ofp_port == ctx->xin->flow.in_port.ofp_port) {
1693 compose_output_action__(ctx, xport->ofp_port, false);
1694 } else if (!(xport->config & OFPUTIL_PC_NO_FLOOD)) {
1695 compose_output_action(ctx, xport->ofp_port);
1699 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
1703 execute_controller_action(struct xlate_ctx *ctx, int len,
1704 enum ofp_packet_in_reason reason,
1705 uint16_t controller_id)
1707 struct ofputil_packet_in *pin;
1708 struct ofpbuf *packet;
1711 ovs_assert(!ctx->xout->slow || ctx->xout->slow == SLOW_CONTROLLER);
1712 ctx->xout->slow = SLOW_CONTROLLER;
1713 if (!ctx->xin->packet) {
1717 packet = ofpbuf_clone(ctx->xin->packet);
1719 key.skb_priority = 0;
1721 memset(&key.tunnel, 0, sizeof key.tunnel);
1723 commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
1724 &ctx->xout->odp_actions, &ctx->xout->wc);
1726 odp_execute_actions(NULL, packet, &key, ctx->xout->odp_actions.data,
1727 ctx->xout->odp_actions.size, NULL, NULL);
1729 pin = xmalloc(sizeof *pin);
1730 pin->packet_len = packet->size;
1731 pin->packet = ofpbuf_steal_data(packet);
1732 pin->reason = reason;
1733 pin->controller_id = controller_id;
1734 pin->table_id = ctx->table_id;
1735 pin->cookie = ctx->rule ? ctx->rule->up.flow_cookie : 0;
1737 pin->send_len = len;
1738 flow_get_metadata(&ctx->xin->flow, &pin->fmd);
1740 ofproto_dpif_send_packet_in(ctx->xbridge->ofproto, pin);
1741 ofpbuf_delete(packet);
1745 compose_mpls_push_action(struct xlate_ctx *ctx, ovs_be16 eth_type)
1747 struct flow_wildcards *wc = &ctx->xout->wc;
1748 struct flow *flow = &ctx->xin->flow;
1750 ovs_assert(eth_type_mpls(eth_type));
1752 memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse);
1753 memset(&wc->masks.mpls_depth, 0xff, sizeof wc->masks.mpls_depth);
1755 if (flow->mpls_depth) {
1756 flow->mpls_lse &= ~htonl(MPLS_BOS_MASK);
1762 if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
1763 label = htonl(0x2); /* IPV6 Explicit Null. */
1765 label = htonl(0x0); /* IPV4 Explicit Null. */
1767 wc->masks.nw_tos |= IP_DSCP_MASK;
1768 wc->masks.nw_ttl = 0xff;
1769 tc = (flow->nw_tos & IP_DSCP_MASK) >> 2;
1770 ttl = flow->nw_ttl ? flow->nw_ttl : 0x40;
1771 flow->mpls_lse = set_mpls_lse_values(ttl, tc, 1, label);
1772 flow->mpls_depth = 1;
1774 flow->dl_type = eth_type;
1778 compose_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type)
1780 struct flow_wildcards *wc = &ctx->xout->wc;
1781 struct flow *flow = &ctx->xin->flow;
1783 ovs_assert(eth_type_mpls(ctx->xin->flow.dl_type));
1784 ovs_assert(!eth_type_mpls(eth_type));
1786 memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse);
1787 memset(&wc->masks.mpls_depth, 0xff, sizeof wc->masks.mpls_depth);
1789 if (flow->mpls_depth) {
1791 flow->mpls_lse = htonl(0);
1792 if (!flow->mpls_depth) {
1793 flow->dl_type = eth_type;
1799 compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids)
1801 struct flow *flow = &ctx->xin->flow;
1803 if (!is_ip_any(flow)) {
1807 ctx->xout->wc.masks.nw_ttl = 0xff;
1808 if (flow->nw_ttl > 1) {
1814 for (i = 0; i < ids->n_controllers; i++) {
1815 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL,
1819 /* Stop processing for current table. */
1825 compose_set_mpls_ttl_action(struct xlate_ctx *ctx, uint8_t ttl)
1827 if (!eth_type_mpls(ctx->xin->flow.dl_type)) {
1831 ctx->xout->wc.masks.mpls_lse |= htonl(MPLS_TTL_MASK);
1832 set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse, ttl);
1837 compose_dec_mpls_ttl_action(struct xlate_ctx *ctx)
1839 struct flow *flow = &ctx->xin->flow;
1840 uint8_t ttl = mpls_lse_to_ttl(flow->mpls_lse);
1841 struct flow_wildcards *wc = &ctx->xout->wc;
1843 memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse);
1845 if (!eth_type_mpls(flow->dl_type)) {
1851 set_mpls_lse_ttl(&flow->mpls_lse, ttl);
1854 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, 0);
1856 /* Stop processing for current table. */
1862 xlate_output_action(struct xlate_ctx *ctx,
1863 ofp_port_t port, uint16_t max_len, bool may_packet_in)
1865 ofp_port_t prev_nf_output_iface = ctx->xout->nf_output_iface;
1867 ctx->xout->nf_output_iface = NF_OUT_DROP;
1871 compose_output_action(ctx, ctx->xin->flow.in_port.ofp_port);
1874 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
1881 flood_packets(ctx, false);
1884 flood_packets(ctx, true);
1886 case OFPP_CONTROLLER:
1887 execute_controller_action(ctx, max_len, OFPR_ACTION, 0);
1893 if (port != ctx->xin->flow.in_port.ofp_port) {
1894 compose_output_action(ctx, port);
1896 xlate_report(ctx, "skipping output to input port");
1901 if (prev_nf_output_iface == NF_OUT_FLOOD) {
1902 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
1903 } else if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
1904 ctx->xout->nf_output_iface = prev_nf_output_iface;
1905 } else if (prev_nf_output_iface != NF_OUT_DROP &&
1906 ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
1907 ctx->xout->nf_output_iface = NF_OUT_MULTI;
1912 xlate_output_reg_action(struct xlate_ctx *ctx,
1913 const struct ofpact_output_reg *or)
1915 uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow);
1916 if (port <= UINT16_MAX) {
1917 union mf_subvalue value;
1919 memset(&value, 0xff, sizeof value);
1920 mf_write_subfield_flow(&or->src, &value, &ctx->xout->wc.masks);
1921 xlate_output_action(ctx, u16_to_ofp(port),
1922 or->max_len, false);
1927 xlate_enqueue_action(struct xlate_ctx *ctx,
1928 const struct ofpact_enqueue *enqueue)
1930 ofp_port_t ofp_port = enqueue->port;
1931 uint32_t queue_id = enqueue->queue;
1932 uint32_t flow_priority, priority;
1935 /* Translate queue to priority. */
1936 error = dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &priority);
1938 /* Fall back to ordinary output action. */
1939 xlate_output_action(ctx, enqueue->port, 0, false);
1943 /* Check output port. */
1944 if (ofp_port == OFPP_IN_PORT) {
1945 ofp_port = ctx->xin->flow.in_port.ofp_port;
1946 } else if (ofp_port == ctx->xin->flow.in_port.ofp_port) {
1950 /* Add datapath actions. */
1951 flow_priority = ctx->xin->flow.skb_priority;
1952 ctx->xin->flow.skb_priority = priority;
1953 compose_output_action(ctx, ofp_port);
1954 ctx->xin->flow.skb_priority = flow_priority;
1956 /* Update NetFlow output port. */
1957 if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
1958 ctx->xout->nf_output_iface = ofp_port;
1959 } else if (ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
1960 ctx->xout->nf_output_iface = NF_OUT_MULTI;
1965 xlate_set_queue_action(struct xlate_ctx *ctx, uint32_t queue_id)
1967 uint32_t skb_priority;
1969 if (!dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &skb_priority)) {
1970 ctx->xin->flow.skb_priority = skb_priority;
1972 /* Couldn't translate queue to a priority. Nothing to do. A warning
1973 * has already been logged. */
1978 slave_enabled_cb(ofp_port_t ofp_port, void *xbridge_)
1980 const struct xbridge *xbridge = xbridge_;
1991 case OFPP_CONTROLLER: /* Not supported by the bundle action. */
1994 port = get_ofp_port(xbridge, ofp_port);
1995 return port ? port->may_enable : false;
2000 xlate_bundle_action(struct xlate_ctx *ctx,
2001 const struct ofpact_bundle *bundle)
2005 port = bundle_execute(bundle, &ctx->xin->flow, &ctx->xout->wc,
2007 CONST_CAST(struct xbridge *, ctx->xbridge));
2008 if (bundle->dst.field) {
2009 nxm_reg_load(&bundle->dst, ofp_to_u16(port), &ctx->xin->flow,
2012 xlate_output_action(ctx, port, 0, false);
2017 xlate_learn_action(struct xlate_ctx *ctx,
2018 const struct ofpact_learn *learn)
2020 struct ofputil_flow_mod *fm;
2021 struct ofpbuf ofpacts;
2023 ctx->xout->has_learn = true;
2025 learn_mask(learn, &ctx->xout->wc);
2027 if (!ctx->xin->may_learn) {
2031 fm = xmalloc(sizeof *fm);
2032 ofpbuf_init(&ofpacts, 0);
2033 learn_execute(learn, &ctx->xin->flow, fm, &ofpacts);
2035 ofproto_dpif_flow_mod(ctx->xbridge->ofproto, fm);
2038 /* Reduces '*timeout' to no more than 'max'. A value of zero in either case
2039 * means "infinite". */
2041 reduce_timeout(uint16_t max, uint16_t *timeout)
2043 if (max && (!*timeout || *timeout > max)) {
2049 xlate_fin_timeout(struct xlate_ctx *ctx,
2050 const struct ofpact_fin_timeout *oft)
2052 if (ctx->xin->tcp_flags & (TCP_FIN | TCP_RST) && ctx->rule) {
2053 struct rule_dpif *rule = ctx->rule;
2055 ovs_mutex_lock(&rule->up.ofproto->expirable_mutex);
2056 if (list_is_empty(&rule->up.expirable)) {
2057 list_insert(&rule->up.ofproto->expirable, &rule->up.expirable);
2059 ovs_mutex_unlock(&rule->up.ofproto->expirable_mutex);
2061 ovs_mutex_lock(&rule->up.timeout_mutex);
2062 reduce_timeout(oft->fin_idle_timeout, &rule->up.idle_timeout);
2063 reduce_timeout(oft->fin_hard_timeout, &rule->up.hard_timeout);
2064 ovs_mutex_unlock(&rule->up.timeout_mutex);
2069 xlate_sample_action(struct xlate_ctx *ctx,
2070 const struct ofpact_sample *os)
2072 union user_action_cookie cookie;
2073 /* Scale the probability from 16-bit to 32-bit while representing
2074 * the same percentage. */
2075 uint32_t probability = (os->probability << 16) | os->probability;
2077 commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
2078 &ctx->xout->odp_actions, &ctx->xout->wc);
2080 compose_flow_sample_cookie(os->probability, os->collector_set_id,
2081 os->obs_domain_id, os->obs_point_id, &cookie);
2082 compose_sample_action(ctx->xbridge, &ctx->xout->odp_actions, &ctx->xin->flow,
2083 probability, &cookie, sizeof cookie.flow_sample);
2087 may_receive(const struct xport *xport, struct xlate_ctx *ctx)
2089 if (xport->config & (eth_addr_equals(ctx->xin->flow.dl_dst, eth_addr_stp)
2090 ? OFPUTIL_PC_NO_RECV_STP
2091 : OFPUTIL_PC_NO_RECV)) {
2095 /* Only drop packets here if both forwarding and learning are
2096 * disabled. If just learning is enabled, we need to have
2097 * OFPP_NORMAL and the learning action have a look at the packet
2098 * before we can drop it. */
2099 if (!xport_stp_forward_state(xport) && !xport_stp_learn_state(xport)) {
2107 tunnel_ecn_ok(struct xlate_ctx *ctx)
2109 if (is_ip_any(&ctx->base_flow)
2110 && (ctx->xin->flow.tunnel.ip_tos & IP_ECN_MASK) == IP_ECN_CE) {
2111 if ((ctx->base_flow.nw_tos & IP_ECN_MASK) == IP_ECN_NOT_ECT) {
2112 VLOG_WARN_RL(&rl, "dropping tunnel packet marked ECN CE"
2113 " but is not ECN capable");
2116 /* Set the ECN CE value in the tunneled packet. */
2117 ctx->xin->flow.nw_tos |= IP_ECN_CE;
2125 do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len,
2126 struct xlate_ctx *ctx)
2128 struct flow_wildcards *wc = &ctx->xout->wc;
2129 struct flow *flow = &ctx->xin->flow;
2130 bool was_evictable = true;
2131 const struct ofpact *a;
2134 /* Don't let the rule we're working on get evicted underneath us. */
2135 was_evictable = ctx->rule->up.evictable;
2136 ctx->rule->up.evictable = false;
2139 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
2140 struct ofpact_controller *controller;
2141 const struct ofpact_metadata *metadata;
2149 xlate_output_action(ctx, ofpact_get_OUTPUT(a)->port,
2150 ofpact_get_OUTPUT(a)->max_len, true);
2153 case OFPACT_CONTROLLER:
2154 controller = ofpact_get_CONTROLLER(a);
2155 execute_controller_action(ctx, controller->max_len,
2157 controller->controller_id);
2160 case OFPACT_ENQUEUE:
2161 xlate_enqueue_action(ctx, ofpact_get_ENQUEUE(a));
2164 case OFPACT_SET_VLAN_VID:
2165 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
2166 flow->vlan_tci &= ~htons(VLAN_VID_MASK);
2167 flow->vlan_tci |= (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid)
2171 case OFPACT_SET_VLAN_PCP:
2172 wc->masks.vlan_tci |= htons(VLAN_PCP_MASK | VLAN_CFI);
2173 flow->vlan_tci &= ~htons(VLAN_PCP_MASK);
2175 htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp << VLAN_PCP_SHIFT)
2179 case OFPACT_STRIP_VLAN:
2180 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
2181 flow->vlan_tci = htons(0);
2184 case OFPACT_PUSH_VLAN:
2185 /* XXX 802.1AD(QinQ) */
2186 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
2187 flow->vlan_tci = htons(VLAN_CFI);
2190 case OFPACT_SET_ETH_SRC:
2191 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
2192 memcpy(flow->dl_src, ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN);
2195 case OFPACT_SET_ETH_DST:
2196 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
2197 memcpy(flow->dl_dst, ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN);
2200 case OFPACT_SET_IPV4_SRC:
2201 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
2202 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2203 flow->nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4;
2207 case OFPACT_SET_IPV4_DST:
2208 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
2209 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2210 flow->nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4;
2214 case OFPACT_SET_IPV4_DSCP:
2215 wc->masks.nw_tos |= IP_DSCP_MASK;
2216 /* OpenFlow 1.0 only supports IPv4. */
2217 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2218 flow->nw_tos &= ~IP_DSCP_MASK;
2219 flow->nw_tos |= ofpact_get_SET_IPV4_DSCP(a)->dscp;
2223 case OFPACT_SET_L4_SRC_PORT:
2224 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2225 memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src);
2226 if (is_ip_any(flow)) {
2227 flow->tp_src = htons(ofpact_get_SET_L4_SRC_PORT(a)->port);
2231 case OFPACT_SET_L4_DST_PORT:
2232 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2233 memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst);
2234 if (is_ip_any(flow)) {
2235 flow->tp_dst = htons(ofpact_get_SET_L4_DST_PORT(a)->port);
2239 case OFPACT_RESUBMIT:
2240 xlate_ofpact_resubmit(ctx, ofpact_get_RESUBMIT(a));
2243 case OFPACT_SET_TUNNEL:
2244 flow->tunnel.tun_id = htonll(ofpact_get_SET_TUNNEL(a)->tun_id);
2247 case OFPACT_SET_QUEUE:
2248 xlate_set_queue_action(ctx, ofpact_get_SET_QUEUE(a)->queue_id);
2251 case OFPACT_POP_QUEUE:
2252 flow->skb_priority = ctx->orig_skb_priority;
2255 case OFPACT_REG_MOVE:
2256 nxm_execute_reg_move(ofpact_get_REG_MOVE(a), flow, wc);
2259 case OFPACT_REG_LOAD:
2260 nxm_execute_reg_load(ofpact_get_REG_LOAD(a), flow);
2263 case OFPACT_STACK_PUSH:
2264 nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), flow, wc,
2268 case OFPACT_STACK_POP:
2269 nxm_execute_stack_pop(ofpact_get_STACK_POP(a), flow, wc,
2273 case OFPACT_PUSH_MPLS:
2274 compose_mpls_push_action(ctx, ofpact_get_PUSH_MPLS(a)->ethertype);
2277 case OFPACT_POP_MPLS:
2278 compose_mpls_pop_action(ctx, ofpact_get_POP_MPLS(a)->ethertype);
2281 case OFPACT_SET_MPLS_TTL:
2282 if (compose_set_mpls_ttl_action(ctx,
2283 ofpact_get_SET_MPLS_TTL(a)->ttl)) {
2288 case OFPACT_DEC_MPLS_TTL:
2289 if (compose_dec_mpls_ttl_action(ctx)) {
2294 case OFPACT_DEC_TTL:
2295 wc->masks.nw_ttl = 0xff;
2296 if (compose_dec_ttl(ctx, ofpact_get_DEC_TTL(a))) {
2302 /* Nothing to do. */
2305 case OFPACT_MULTIPATH:
2306 multipath_execute(ofpact_get_MULTIPATH(a), flow, wc);
2310 xlate_bundle_action(ctx, ofpact_get_BUNDLE(a));
2313 case OFPACT_OUTPUT_REG:
2314 xlate_output_reg_action(ctx, ofpact_get_OUTPUT_REG(a));
2318 xlate_learn_action(ctx, ofpact_get_LEARN(a));
2325 case OFPACT_FIN_TIMEOUT:
2326 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2327 ctx->xout->has_fin_timeout = true;
2328 xlate_fin_timeout(ctx, ofpact_get_FIN_TIMEOUT(a));
2331 case OFPACT_CLEAR_ACTIONS:
2333 * Nothing to do because writa-actions is not supported for now.
2334 * When writa-actions is supported, clear-actions also must
2335 * be supported at the same time.
2339 case OFPACT_WRITE_METADATA:
2340 metadata = ofpact_get_WRITE_METADATA(a);
2341 flow->metadata &= ~metadata->mask;
2342 flow->metadata |= metadata->metadata & metadata->mask;
2346 /* Not implemented yet. */
2349 case OFPACT_GOTO_TABLE: {
2350 /* It is assumed that goto-table is the last action. */
2351 struct ofpact_goto_table *ogt = ofpact_get_GOTO_TABLE(a);
2353 ovs_assert(ctx->table_id < ogt->table_id);
2354 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
2355 ogt->table_id, true);
2360 xlate_sample_action(ctx, ofpact_get_SAMPLE(a));
2367 ctx->rule->up.evictable = was_evictable;
2372 xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto,
2373 const struct flow *flow, struct rule_dpif *rule,
2374 uint8_t tcp_flags, const struct ofpbuf *packet)
2376 xin->ofproto = ofproto;
2378 xin->packet = packet;
2379 xin->may_learn = packet != NULL;
2381 xin->ofpacts = NULL;
2382 xin->ofpacts_len = 0;
2383 xin->tcp_flags = tcp_flags;
2384 xin->resubmit_hook = NULL;
2385 xin->report_hook = NULL;
2386 xin->resubmit_stats = NULL;
2390 xlate_out_uninit(struct xlate_out *xout)
2393 ofpbuf_uninit(&xout->odp_actions);
2397 /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts'
2398 * into datapath actions, using 'ctx', and discards the datapath actions. */
2400 xlate_actions_for_side_effects(struct xlate_in *xin)
2402 struct xlate_out xout;
2404 xlate_actions(xin, &xout);
2405 xlate_out_uninit(&xout);
2409 xlate_report(struct xlate_ctx *ctx, const char *s)
2411 if (ctx->xin->report_hook) {
2412 ctx->xin->report_hook(ctx->xin, s, ctx->recurse);
2417 xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src)
2420 dst->slow = src->slow;
2421 dst->has_learn = src->has_learn;
2422 dst->has_normal = src->has_normal;
2423 dst->has_fin_timeout = src->has_fin_timeout;
2424 dst->nf_output_iface = src->nf_output_iface;
2425 dst->mirrors = src->mirrors;
2427 ofpbuf_use_stub(&dst->odp_actions, dst->odp_actions_stub,
2428 sizeof dst->odp_actions_stub);
2429 ofpbuf_put(&dst->odp_actions, src->odp_actions.data,
2430 src->odp_actions.size);
2433 static struct skb_priority_to_dscp *
2434 get_skb_priority(const struct xport *xport, uint32_t skb_priority)
2436 struct skb_priority_to_dscp *pdscp;
2439 hash = hash_int(skb_priority, 0);
2440 HMAP_FOR_EACH_IN_BUCKET (pdscp, hmap_node, hash, &xport->skb_priorities) {
2441 if (pdscp->skb_priority == skb_priority) {
2449 dscp_from_skb_priority(const struct xport *xport, uint32_t skb_priority,
2452 struct skb_priority_to_dscp *pdscp = get_skb_priority(xport, skb_priority);
2453 *dscp = pdscp ? pdscp->dscp : 0;
2454 return pdscp != NULL;
2458 clear_skb_priorities(struct xport *xport)
2460 struct skb_priority_to_dscp *pdscp, *next;
2462 HMAP_FOR_EACH_SAFE (pdscp, next, hmap_node, &xport->skb_priorities) {
2463 hmap_remove(&xport->skb_priorities, &pdscp->hmap_node);
2469 actions_output_to_local_port(const struct xlate_ctx *ctx)
2471 odp_port_t local_odp_port = ofp_port_to_odp_port(ctx->xbridge, OFPP_LOCAL);
2472 const struct nlattr *a;
2475 NL_ATTR_FOR_EACH_UNSAFE (a, left, ctx->xout->odp_actions.data,
2476 ctx->xout->odp_actions.size) {
2477 if (nl_attr_type(a) == OVS_ACTION_ATTR_OUTPUT
2478 && nl_attr_get_odp_port(a) == local_odp_port) {
2485 /* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts'
2486 * into datapath actions in 'odp_actions', using 'ctx'. */
2488 xlate_actions(struct xlate_in *xin, struct xlate_out *xout)
2490 struct flow_wildcards *wc = &xout->wc;
2491 struct flow *flow = &xin->flow;
2493 enum slow_path_reason special;
2494 const struct ofpact *ofpacts;
2495 struct xport *in_port;
2496 struct flow orig_flow;
2497 struct xlate_ctx ctx;
2500 COVERAGE_INC(xlate_actions);
2502 ovs_rwlock_rdlock(&xlate_rwlock);
2504 /* Flow initialization rules:
2505 * - 'base_flow' must match the kernel's view of the packet at the
2506 * time that action processing starts. 'flow' represents any
2507 * transformations we wish to make through actions.
2508 * - By default 'base_flow' and 'flow' are the same since the input
2509 * packet matches the output before any actions are applied.
2510 * - When using VLAN splinters, 'base_flow''s VLAN is set to the value
2511 * of the received packet as seen by the kernel. If we later output
2512 * to another device without any modifications this will cause us to
2513 * insert a new tag since the original one was stripped off by the
2515 * - Tunnel metadata as received is retained in 'flow'. This allows
2516 * tunnel metadata matching also in later tables.
2517 * Since a kernel action for setting the tunnel metadata will only be
2518 * generated with actual tunnel output, changing the tunnel metadata
2519 * values in 'flow' (such as tun_id) will only have effect with a later
2520 * tunnel output action.
2521 * - Tunnel 'base_flow' is completely cleared since that is what the
2522 * kernel does. If we wish to maintain the original values an action
2523 * needs to be generated. */
2528 ctx.xout->has_learn = false;
2529 ctx.xout->has_normal = false;
2530 ctx.xout->has_fin_timeout = false;
2531 ctx.xout->nf_output_iface = NF_OUT_DROP;
2532 ctx.xout->mirrors = 0;
2533 ofpbuf_use_stub(&ctx.xout->odp_actions, ctx.xout->odp_actions_stub,
2534 sizeof ctx.xout->odp_actions_stub);
2535 ofpbuf_reserve(&ctx.xout->odp_actions, NL_A_U32_SIZE);
2537 ctx.xbridge = xbridge_lookup(xin->ofproto);
2542 ctx.rule = xin->rule;
2544 ctx.base_flow = *flow;
2545 memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel);
2546 ctx.orig_tunnel_ip_dst = flow->tunnel.ip_dst;
2548 flow_wildcards_init_catchall(wc);
2549 memset(&wc->masks.in_port, 0xff, sizeof wc->masks.in_port);
2550 memset(&wc->masks.skb_priority, 0xff, sizeof wc->masks.skb_priority);
2551 memset(&wc->masks.dl_type, 0xff, sizeof wc->masks.dl_type);
2552 wc->masks.nw_frag |= FLOW_NW_FRAG_MASK;
2554 if (tnl_port_should_receive(&ctx.xin->flow)) {
2555 memset(&wc->masks.tunnel, 0xff, sizeof wc->masks.tunnel);
2556 /* skb_mark is currently used only by tunnels but that will likely
2557 * change in the future. */
2558 memset(&wc->masks.skb_mark, 0xff, sizeof wc->masks.skb_mark);
2560 if (ctx.xbridge->has_netflow) {
2561 netflow_mask_wc(flow, wc);
2565 ctx.orig_skb_priority = flow->skb_priority;
2570 ofpacts = xin->ofpacts;
2571 ofpacts_len = xin->ofpacts_len;
2572 } else if (xin->rule) {
2573 ofpacts = xin->rule->up.ofpacts;
2574 ofpacts_len = xin->rule->up.ofpacts_len;
2579 ofpbuf_use_stub(&ctx.stack, ctx.init_stack, sizeof ctx.init_stack);
2581 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
2582 /* Do this conditionally because the copy is expensive enough that it
2583 * shows up in profiles. */
2587 if (flow->nw_frag & FLOW_NW_FRAG_ANY) {
2588 switch (ctx.xbridge->frag) {
2589 case OFPC_FRAG_NORMAL:
2590 /* We must pretend that transport ports are unavailable. */
2591 flow->tp_src = ctx.base_flow.tp_src = htons(0);
2592 flow->tp_dst = ctx.base_flow.tp_dst = htons(0);
2595 case OFPC_FRAG_DROP:
2598 case OFPC_FRAG_REASM:
2601 case OFPC_FRAG_NX_MATCH:
2602 /* Nothing to do. */
2605 case OFPC_INVALID_TTL_TO_CONTROLLER:
2610 in_port = get_ofp_port(ctx.xbridge, flow->in_port.ofp_port);
2611 special = process_special(&ctx, flow, in_port, ctx.xin->packet);
2613 ctx.xout->slow = special;
2615 size_t sample_actions_len;
2617 if (flow->in_port.ofp_port
2618 != vsp_realdev_to_vlandev(ctx.xbridge->ofproto,
2619 flow->in_port.ofp_port,
2621 ctx.base_flow.vlan_tci = 0;
2624 add_sflow_action(&ctx);
2625 add_ipfix_action(&ctx);
2626 sample_actions_len = ctx.xout->odp_actions.size;
2628 if (tunnel_ecn_ok(&ctx) && (!in_port || may_receive(in_port, &ctx))) {
2629 do_xlate_actions(ofpacts, ofpacts_len, &ctx);
2631 /* We've let OFPP_NORMAL and the learning action look at the
2632 * packet, so drop it now if forwarding is disabled. */
2633 if (in_port && !xport_stp_forward_state(in_port)) {
2634 ctx.xout->odp_actions.size = sample_actions_len;
2638 if (ctx.xbridge->has_in_band
2639 && in_band_must_output_to_local_port(flow)
2640 && !actions_output_to_local_port(&ctx)) {
2641 compose_output_action(&ctx, OFPP_LOCAL);
2644 fix_sflow_action(&ctx);
2646 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
2647 add_mirror_actions(&ctx, &orig_flow);
2651 ofpbuf_uninit(&ctx.stack);
2653 /* Clear the metadata and register wildcard masks, because we won't
2654 * use non-header fields as part of the cache. */
2655 memset(&wc->masks.metadata, 0, sizeof wc->masks.metadata);
2656 memset(&wc->masks.regs, 0, sizeof wc->masks.regs);
2659 ovs_rwlock_unlock(&xlate_rwlock);