1 /* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License. */
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-monitor.h"
46 #include "ofproto/ofproto-dpif-sflow.h"
47 #include "ofproto/ofproto-dpif.h"
48 #include "ofproto/ofproto-provider.h"
52 COVERAGE_DEFINE(xlate_actions);
53 COVERAGE_DEFINE(xlate_actions_oversize);
54 COVERAGE_DEFINE(xlate_actions_mpls_overflow);
56 VLOG_DEFINE_THIS_MODULE(ofproto_dpif_xlate);
58 /* Maximum depth of flow table recursion (due to resubmit actions) in a
59 * flow translation. */
60 #define MAX_RESUBMIT_RECURSION 64
61 #define MAX_INTERNAL_RESUBMITS 1 /* Max resbmits allowed using rules in
64 /* Maximum number of resubmit actions in a flow translation, whether they are
65 * recursive or not. */
66 #define MAX_RESUBMITS (MAX_RESUBMIT_RECURSION * MAX_RESUBMIT_RECURSION)
68 struct ovs_rwlock xlate_rwlock = OVS_RWLOCK_INITIALIZER;
71 struct hmap_node hmap_node; /* Node in global 'xbridges' map. */
72 struct ofproto_dpif *ofproto; /* Key in global 'xbridges' map. */
74 struct list xbundles; /* Owned xbundles. */
75 struct hmap xports; /* Indexed by ofp_port. */
77 char *name; /* Name used in log messages. */
78 struct dpif *dpif; /* Datapath interface. */
79 struct mac_learning *ml; /* Mac learning handle. */
80 struct mbridge *mbridge; /* Mirroring. */
81 struct dpif_sflow *sflow; /* SFlow handle, or null. */
82 struct dpif_ipfix *ipfix; /* Ipfix handle, or null. */
83 struct netflow *netflow; /* Netflow handle, or null. */
84 struct stp *stp; /* STP or null if disabled. */
86 /* Special rules installed by ofproto-dpif. */
87 struct rule_dpif *miss_rule;
88 struct rule_dpif *no_packet_in_rule;
90 enum ofp_config_flags frag; /* Fragmentation handling. */
91 bool has_in_band; /* Bridge has in band control? */
92 bool forward_bpdu; /* Bridge forwards STP BPDUs? */
94 /* True if the datapath supports recirculation. */
97 /* True if the datapath supports variable-length
98 * OVS_USERSPACE_ATTR_USERDATA in OVS_ACTION_ATTR_USERSPACE actions.
99 * False if the datapath supports only 8-byte (or shorter) userdata. */
100 bool variable_length_userdata;
102 /* Number of MPLS label stack entries that the datapath supports
104 size_t max_mpls_depth;
108 struct hmap_node hmap_node; /* In global 'xbundles' map. */
109 struct ofbundle *ofbundle; /* Key in global 'xbundles' map. */
111 struct list list_node; /* In parent 'xbridges' list. */
112 struct xbridge *xbridge; /* Parent xbridge. */
114 struct list xports; /* Contains "struct xport"s. */
116 char *name; /* Name used in log messages. */
117 struct bond *bond; /* Nonnull iff more than one port. */
118 struct lacp *lacp; /* LACP handle or null. */
120 enum port_vlan_mode vlan_mode; /* VLAN mode. */
121 int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */
122 unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1.
123 * NULL if all VLANs are trunked. */
124 bool use_priority_tags; /* Use 802.1p tag for frames in VLAN 0? */
125 bool floodable; /* No port has OFPUTIL_PC_NO_FLOOD set? */
129 struct hmap_node hmap_node; /* Node in global 'xports' map. */
130 struct ofport_dpif *ofport; /* Key in global 'xports map. */
132 struct hmap_node ofp_node; /* Node in parent xbridge 'xports' map. */
133 ofp_port_t ofp_port; /* Key in parent xbridge 'xports' map. */
135 odp_port_t odp_port; /* Datapath port number or ODPP_NONE. */
137 struct list bundle_node; /* In parent xbundle (if it exists). */
138 struct xbundle *xbundle; /* Parent xbundle or null. */
140 struct netdev *netdev; /* 'ofport''s netdev. */
142 struct xbridge *xbridge; /* Parent bridge. */
143 struct xport *peer; /* Patch port peer or null. */
145 enum ofputil_port_config config; /* OpenFlow port configuration. */
146 enum ofputil_port_state state; /* OpenFlow port state. */
147 int stp_port_no; /* STP port number or -1 if not in use. */
149 struct hmap skb_priorities; /* Map of 'skb_priority_to_dscp's. */
151 bool may_enable; /* May be enabled in bonds. */
152 bool is_tunnel; /* Is a tunnel port. */
154 struct cfm *cfm; /* CFM handle or null. */
155 struct bfd *bfd; /* BFD handle or null. */
159 struct xlate_in *xin;
160 struct xlate_out *xout;
162 const struct xbridge *xbridge;
164 /* Flow at the last commit. */
165 struct flow base_flow;
167 /* Tunnel IP destination address as received. This is stored separately
168 * as the base_flow.tunnel is cleared on init to reflect the datapath
169 * behavior. Used to make sure not to send tunneled output to ourselves,
170 * which might lead to an infinite loop. This could happen easily
171 * if a tunnel is marked as 'ip_remote=flow', and the flow does not
172 * actually set the tun_dst field. */
173 ovs_be32 orig_tunnel_ip_dst;
175 /* Stack for the push and pop actions. Each stack element is of type
176 * "union mf_subvalue". */
177 union mf_subvalue init_stack[1024 / sizeof(union mf_subvalue)];
180 /* The rule that we are currently translating, or NULL. */
181 struct rule_dpif *rule;
183 /* Resubmit statistics, via xlate_table_action(). */
184 int recurse; /* Current resubmit nesting depth. */
185 int resubmits; /* Total number of resubmits. */
186 bool in_group; /* Currently translating ofgroup, if true. */
188 uint32_t orig_skb_priority; /* Priority when packet arrived. */
189 uint8_t table_id; /* OpenFlow table ID where flow was found. */
190 uint32_t sflow_n_outputs; /* Number of output ports. */
191 odp_port_t sflow_odp_port; /* Output port for composing sFlow action. */
192 uint16_t user_cookie_offset;/* Used for user_action_cookie fixup. */
193 bool exit; /* No further actions should be processed. */
195 bool use_recirc; /* Should generate recirc? */
196 struct xlate_recirc recirc; /* Information used for generating
197 * recirculation actions */
199 /* OpenFlow 1.1+ action set.
201 * 'action_set' accumulates "struct ofpact"s added by OFPACT_WRITE_ACTIONS.
202 * When translation is otherwise complete, ofpacts_execute_action_set()
203 * converts it to a set of "struct ofpact"s that can be translated into
204 * datapath actions. */
205 struct ofpbuf action_set; /* Action set. */
206 uint64_t action_set_stub[1024 / 8];
209 /* A controller may use OFPP_NONE as the ingress port to indicate that
210 * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for
211 * when an input bundle is needed for validation (e.g., mirroring or
212 * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have
213 * any 'port' structs, so care must be taken when dealing with it. */
214 static struct xbundle ofpp_none_bundle = {
216 .vlan_mode = PORT_VLAN_TRUNK
219 /* Node in 'xport''s 'skb_priorities' map. Used to maintain a map from
220 * 'priority' (the datapath's term for QoS queue) to the dscp bits which all
221 * traffic egressing the 'ofport' with that priority should be marked with. */
222 struct skb_priority_to_dscp {
223 struct hmap_node hmap_node; /* Node in 'ofport_dpif''s 'skb_priorities'. */
224 uint32_t skb_priority; /* Priority of this queue (see struct flow). */
226 uint8_t dscp; /* DSCP bits to mark outgoing traffic with. */
241 /* xlate_cache entries hold enough information to perform the side effects of
242 * xlate_actions() for a rule, without needing to perform rule translation
243 * from scratch. The primary usage of these is to submit statistics to objects
244 * that a flow relates to, although they may be used for other effects as well
245 * (for instance, refreshing hard timeouts for learned flows). */
249 struct rule_dpif *rule;
256 struct netflow *netflow;
261 struct mbridge *mbridge;
262 mirror_mask_t mirrors;
270 struct ofproto_dpif *ofproto;
271 struct rule_dpif *rule;
274 struct ofproto_dpif *ofproto;
279 struct rule_dpif *rule;
284 struct group_dpif *group;
285 struct ofputil_bucket *bucket;
290 #define XC_ENTRY_FOR_EACH(entry, entries, xcache) \
291 entries = xcache->entries; \
292 for (entry = ofpbuf_try_pull(&entries, sizeof *entry); \
294 entry = ofpbuf_try_pull(&entries, sizeof *entry))
297 struct ofpbuf entries;
300 static struct hmap xbridges = HMAP_INITIALIZER(&xbridges);
301 static struct hmap xbundles = HMAP_INITIALIZER(&xbundles);
302 static struct hmap xports = HMAP_INITIALIZER(&xports);
304 static bool may_receive(const struct xport *, struct xlate_ctx *);
305 static void do_xlate_actions(const struct ofpact *, size_t ofpacts_len,
307 static void xlate_actions__(struct xlate_in *, struct xlate_out *)
308 OVS_REQ_RDLOCK(xlate_rwlock);
309 static void xlate_normal(struct xlate_ctx *);
310 static void xlate_report(struct xlate_ctx *, const char *);
311 static void xlate_table_action(struct xlate_ctx *, ofp_port_t in_port,
312 uint8_t table_id, bool may_packet_in,
313 bool honor_table_miss);
314 static bool input_vid_is_valid(uint16_t vid, struct xbundle *, bool warn);
315 static uint16_t input_vid_to_vlan(const struct xbundle *, uint16_t vid);
316 static void output_normal(struct xlate_ctx *, const struct xbundle *,
318 static void compose_output_action(struct xlate_ctx *, ofp_port_t ofp_port);
320 static struct xbridge *xbridge_lookup(const struct ofproto_dpif *);
321 static struct xbundle *xbundle_lookup(const struct ofbundle *);
322 static struct xport *xport_lookup(const struct ofport_dpif *);
323 static struct xport *get_ofp_port(const struct xbridge *, ofp_port_t ofp_port);
324 static struct skb_priority_to_dscp *get_skb_priority(const struct xport *,
325 uint32_t skb_priority);
326 static void clear_skb_priorities(struct xport *);
327 static bool dscp_from_skb_priority(const struct xport *, uint32_t skb_priority,
330 static struct xc_entry *xlate_cache_add_entry(struct xlate_cache *xc,
334 xlate_ofproto_set(struct ofproto_dpif *ofproto, const char *name,
335 struct dpif *dpif, struct rule_dpif *miss_rule,
336 struct rule_dpif *no_packet_in_rule,
337 const struct mac_learning *ml, struct stp *stp,
338 const struct mbridge *mbridge,
339 const struct dpif_sflow *sflow,
340 const struct dpif_ipfix *ipfix,
341 const struct netflow *netflow, enum ofp_config_flags frag,
342 bool forward_bpdu, bool has_in_band,
344 bool variable_length_userdata,
345 size_t max_mpls_depth)
347 struct xbridge *xbridge = xbridge_lookup(ofproto);
350 xbridge = xzalloc(sizeof *xbridge);
351 xbridge->ofproto = ofproto;
353 hmap_insert(&xbridges, &xbridge->hmap_node, hash_pointer(ofproto, 0));
354 hmap_init(&xbridge->xports);
355 list_init(&xbridge->xbundles);
358 if (xbridge->ml != ml) {
359 mac_learning_unref(xbridge->ml);
360 xbridge->ml = mac_learning_ref(ml);
363 if (xbridge->mbridge != mbridge) {
364 mbridge_unref(xbridge->mbridge);
365 xbridge->mbridge = mbridge_ref(mbridge);
368 if (xbridge->sflow != sflow) {
369 dpif_sflow_unref(xbridge->sflow);
370 xbridge->sflow = dpif_sflow_ref(sflow);
373 if (xbridge->ipfix != ipfix) {
374 dpif_ipfix_unref(xbridge->ipfix);
375 xbridge->ipfix = dpif_ipfix_ref(ipfix);
378 if (xbridge->stp != stp) {
379 stp_unref(xbridge->stp);
380 xbridge->stp = stp_ref(stp);
383 if (xbridge->netflow != netflow) {
384 netflow_unref(xbridge->netflow);
385 xbridge->netflow = netflow_ref(netflow);
389 xbridge->name = xstrdup(name);
391 xbridge->dpif = dpif;
392 xbridge->forward_bpdu = forward_bpdu;
393 xbridge->has_in_band = has_in_band;
394 xbridge->frag = frag;
395 xbridge->miss_rule = miss_rule;
396 xbridge->no_packet_in_rule = no_packet_in_rule;
397 xbridge->enable_recirc = enable_recirc;
398 xbridge->variable_length_userdata = variable_length_userdata;
399 xbridge->max_mpls_depth = max_mpls_depth;
403 xlate_remove_ofproto(struct ofproto_dpif *ofproto)
405 struct xbridge *xbridge = xbridge_lookup(ofproto);
406 struct xbundle *xbundle, *next_xbundle;
407 struct xport *xport, *next_xport;
413 HMAP_FOR_EACH_SAFE (xport, next_xport, ofp_node, &xbridge->xports) {
414 xlate_ofport_remove(xport->ofport);
417 LIST_FOR_EACH_SAFE (xbundle, next_xbundle, list_node, &xbridge->xbundles) {
418 xlate_bundle_remove(xbundle->ofbundle);
421 hmap_remove(&xbridges, &xbridge->hmap_node);
422 mac_learning_unref(xbridge->ml);
423 mbridge_unref(xbridge->mbridge);
424 dpif_sflow_unref(xbridge->sflow);
425 dpif_ipfix_unref(xbridge->ipfix);
426 stp_unref(xbridge->stp);
427 hmap_destroy(&xbridge->xports);
433 xlate_bundle_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
434 const char *name, enum port_vlan_mode vlan_mode, int vlan,
435 unsigned long *trunks, bool use_priority_tags,
436 const struct bond *bond, const struct lacp *lacp,
439 struct xbundle *xbundle = xbundle_lookup(ofbundle);
442 xbundle = xzalloc(sizeof *xbundle);
443 xbundle->ofbundle = ofbundle;
444 xbundle->xbridge = xbridge_lookup(ofproto);
446 hmap_insert(&xbundles, &xbundle->hmap_node, hash_pointer(ofbundle, 0));
447 list_insert(&xbundle->xbridge->xbundles, &xbundle->list_node);
448 list_init(&xbundle->xports);
451 ovs_assert(xbundle->xbridge);
454 xbundle->name = xstrdup(name);
456 xbundle->vlan_mode = vlan_mode;
457 xbundle->vlan = vlan;
458 xbundle->trunks = trunks;
459 xbundle->use_priority_tags = use_priority_tags;
460 xbundle->floodable = floodable;
462 if (xbundle->bond != bond) {
463 bond_unref(xbundle->bond);
464 xbundle->bond = bond_ref(bond);
467 if (xbundle->lacp != lacp) {
468 lacp_unref(xbundle->lacp);
469 xbundle->lacp = lacp_ref(lacp);
474 xlate_bundle_remove(struct ofbundle *ofbundle)
476 struct xbundle *xbundle = xbundle_lookup(ofbundle);
477 struct xport *xport, *next;
483 LIST_FOR_EACH_SAFE (xport, next, bundle_node, &xbundle->xports) {
484 list_remove(&xport->bundle_node);
485 xport->xbundle = NULL;
488 hmap_remove(&xbundles, &xbundle->hmap_node);
489 list_remove(&xbundle->list_node);
490 bond_unref(xbundle->bond);
491 lacp_unref(xbundle->lacp);
497 xlate_ofport_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
498 struct ofport_dpif *ofport, ofp_port_t ofp_port,
499 odp_port_t odp_port, const struct netdev *netdev,
500 const struct cfm *cfm, const struct bfd *bfd,
501 struct ofport_dpif *peer, int stp_port_no,
502 const struct ofproto_port_queue *qdscp_list, size_t n_qdscp,
503 enum ofputil_port_config config,
504 enum ofputil_port_state state, bool is_tunnel,
507 struct xport *xport = xport_lookup(ofport);
511 xport = xzalloc(sizeof *xport);
512 xport->ofport = ofport;
513 xport->xbridge = xbridge_lookup(ofproto);
514 xport->ofp_port = ofp_port;
516 hmap_init(&xport->skb_priorities);
517 hmap_insert(&xports, &xport->hmap_node, hash_pointer(ofport, 0));
518 hmap_insert(&xport->xbridge->xports, &xport->ofp_node,
519 hash_ofp_port(xport->ofp_port));
522 ovs_assert(xport->ofp_port == ofp_port);
524 xport->config = config;
525 xport->state = state;
526 xport->stp_port_no = stp_port_no;
527 xport->is_tunnel = is_tunnel;
528 xport->may_enable = may_enable;
529 xport->odp_port = odp_port;
531 if (xport->netdev != netdev) {
532 netdev_close(xport->netdev);
533 xport->netdev = netdev_ref(netdev);
536 if (xport->cfm != cfm) {
537 cfm_unref(xport->cfm);
538 xport->cfm = cfm_ref(cfm);
541 if (xport->bfd != bfd) {
542 bfd_unref(xport->bfd);
543 xport->bfd = bfd_ref(bfd);
547 xport->peer->peer = NULL;
549 xport->peer = xport_lookup(peer);
551 xport->peer->peer = xport;
554 if (xport->xbundle) {
555 list_remove(&xport->bundle_node);
557 xport->xbundle = xbundle_lookup(ofbundle);
558 if (xport->xbundle) {
559 list_insert(&xport->xbundle->xports, &xport->bundle_node);
562 clear_skb_priorities(xport);
563 for (i = 0; i < n_qdscp; i++) {
564 struct skb_priority_to_dscp *pdscp;
565 uint32_t skb_priority;
567 if (dpif_queue_to_priority(xport->xbridge->dpif, qdscp_list[i].queue,
572 pdscp = xmalloc(sizeof *pdscp);
573 pdscp->skb_priority = skb_priority;
574 pdscp->dscp = (qdscp_list[i].dscp << 2) & IP_DSCP_MASK;
575 hmap_insert(&xport->skb_priorities, &pdscp->hmap_node,
576 hash_int(pdscp->skb_priority, 0));
581 xlate_ofport_remove(struct ofport_dpif *ofport)
583 struct xport *xport = xport_lookup(ofport);
590 xport->peer->peer = NULL;
594 if (xport->xbundle) {
595 list_remove(&xport->bundle_node);
598 clear_skb_priorities(xport);
599 hmap_destroy(&xport->skb_priorities);
601 hmap_remove(&xports, &xport->hmap_node);
602 hmap_remove(&xport->xbridge->xports, &xport->ofp_node);
604 netdev_close(xport->netdev);
605 cfm_unref(xport->cfm);
606 bfd_unref(xport->bfd);
610 /* Given a datpath, packet, and flow metadata ('backer', 'packet', and 'key'
611 * respectively), populates 'flow' with the result of odp_flow_key_to_flow().
612 * Optionally populates 'ofproto' with the ofproto_dpif, 'odp_in_port' with
613 * the datapath in_port, that 'packet' ingressed, and 'ipfix', 'sflow', and
614 * 'netflow' with the appropriate handles for those protocols if they're
615 * enabled. Caller is responsible for unrefing them.
617 * If 'ofproto' is nonnull, requires 'flow''s in_port to exist. Otherwise sets
618 * 'flow''s in_port to OFPP_NONE.
620 * This function does post-processing on data returned from
621 * odp_flow_key_to_flow() to help make VLAN splinters transparent to the rest
622 * of the upcall processing logic. In particular, if the extracted in_port is
623 * a VLAN splinter port, it replaces flow->in_port by the "real" port, sets
624 * flow->vlan_tci correctly for the VLAN of the VLAN splinter port, and pushes
625 * a VLAN header onto 'packet' (if it is nonnull).
627 * Similarly, this function also includes some logic to help with tunnels. It
628 * may modify 'flow' as necessary to make the tunneling implementation
629 * transparent to the upcall processing logic.
631 * Returns 0 if successful, ENODEV if the parsed flow has no associated ofport,
632 * or some other positive errno if there are other problems. */
634 xlate_receive(const struct dpif_backer *backer, struct ofpbuf *packet,
635 const struct nlattr *key, size_t key_len, struct flow *flow,
636 struct ofproto_dpif **ofproto, struct dpif_ipfix **ipfix,
637 struct dpif_sflow **sflow, struct netflow **netflow,
638 odp_port_t *odp_in_port)
640 const struct xport *xport;
643 ovs_rwlock_rdlock(&xlate_rwlock);
644 if (odp_flow_key_to_flow(key, key_len, flow) == ODP_FIT_ERROR) {
650 *odp_in_port = flow->in_port.odp_port;
653 xport = xport_lookup(tnl_port_should_receive(flow)
654 ? tnl_port_receive(flow)
655 : odp_port_to_ofport(backer, flow->in_port.odp_port));
657 flow->in_port.ofp_port = xport ? xport->ofp_port : OFPP_NONE;
662 if (vsp_adjust_flow(xport->xbridge->ofproto, flow)) {
664 /* Make the packet resemble the flow, so that it gets sent to
665 * an OpenFlow controller properly, so that it looks correct
666 * for sFlow, and so that flow_extract() will get the correct
667 * vlan_tci if it is called on 'packet'. */
668 eth_push_vlan(packet, htons(ETH_TYPE_VLAN), flow->vlan_tci);
674 *ofproto = xport->xbridge->ofproto;
678 *ipfix = dpif_ipfix_ref(xport->xbridge->ipfix);
682 *sflow = dpif_sflow_ref(xport->xbridge->sflow);
686 *netflow = netflow_ref(xport->xbridge->netflow);
690 ovs_rwlock_unlock(&xlate_rwlock);
694 static struct xbridge *
695 xbridge_lookup(const struct ofproto_dpif *ofproto)
697 struct xbridge *xbridge;
703 HMAP_FOR_EACH_IN_BUCKET (xbridge, hmap_node, hash_pointer(ofproto, 0),
705 if (xbridge->ofproto == ofproto) {
712 static struct xbundle *
713 xbundle_lookup(const struct ofbundle *ofbundle)
715 struct xbundle *xbundle;
721 HMAP_FOR_EACH_IN_BUCKET (xbundle, hmap_node, hash_pointer(ofbundle, 0),
723 if (xbundle->ofbundle == ofbundle) {
730 static struct xport *
731 xport_lookup(const struct ofport_dpif *ofport)
739 HMAP_FOR_EACH_IN_BUCKET (xport, hmap_node, hash_pointer(ofport, 0),
741 if (xport->ofport == ofport) {
748 static struct stp_port *
749 xport_get_stp_port(const struct xport *xport)
751 return xport->xbridge->stp && xport->stp_port_no != -1
752 ? stp_get_port(xport->xbridge->stp, xport->stp_port_no)
757 xport_stp_learn_state(const struct xport *xport)
759 struct stp_port *sp = xport_get_stp_port(xport);
760 return stp_learn_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
764 xport_stp_forward_state(const struct xport *xport)
766 struct stp_port *sp = xport_get_stp_port(xport);
767 return stp_forward_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
771 xport_stp_listen_state(const struct xport *xport)
773 struct stp_port *sp = xport_get_stp_port(xport);
774 return stp_listen_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
777 /* Returns true if STP should process 'flow'. Sets fields in 'wc' that
778 * were used to make the determination.*/
780 stp_should_process_flow(const struct flow *flow, struct flow_wildcards *wc)
782 /* is_stp() also checks dl_type, but dl_type is always set in 'wc'. */
783 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
788 stp_process_packet(const struct xport *xport, const struct ofpbuf *packet)
790 struct stp_port *sp = xport_get_stp_port(xport);
791 struct ofpbuf payload = *packet;
792 struct eth_header *eth = ofpbuf_data(&payload);
794 /* Sink packets on ports that have STP disabled when the bridge has
796 if (!sp || stp_port_get_state(sp) == STP_DISABLED) {
800 /* Trim off padding on payload. */
801 if (ofpbuf_size(&payload) > ntohs(eth->eth_type) + ETH_HEADER_LEN) {
802 ofpbuf_set_size(&payload, ntohs(eth->eth_type) + ETH_HEADER_LEN);
805 if (ofpbuf_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) {
806 stp_received_bpdu(sp, ofpbuf_data(&payload), ofpbuf_size(&payload));
810 static struct xport *
811 get_ofp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
815 HMAP_FOR_EACH_IN_BUCKET (xport, ofp_node, hash_ofp_port(ofp_port),
817 if (xport->ofp_port == ofp_port) {
825 ofp_port_to_odp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
827 const struct xport *xport = get_ofp_port(xbridge, ofp_port);
828 return xport ? xport->odp_port : ODPP_NONE;
832 odp_port_is_alive(const struct xlate_ctx *ctx, ofp_port_t ofp_port)
836 xport = get_ofp_port(ctx->xbridge, ofp_port);
837 if (!xport || xport->config & OFPUTIL_PC_PORT_DOWN ||
838 xport->state & OFPUTIL_PS_LINK_DOWN) {
845 static struct ofputil_bucket *
846 group_first_live_bucket(const struct xlate_ctx *, const struct group_dpif *,
850 group_is_alive(const struct xlate_ctx *ctx, uint32_t group_id, int depth)
852 struct group_dpif *group;
855 hit = group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group);
860 hit = group_first_live_bucket(ctx, group, depth) != NULL;
862 group_dpif_unref(group);
866 #define MAX_LIVENESS_RECURSION 128 /* Arbitrary limit */
869 bucket_is_alive(const struct xlate_ctx *ctx,
870 struct ofputil_bucket *bucket, int depth)
872 if (depth >= MAX_LIVENESS_RECURSION) {
873 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
875 VLOG_WARN_RL(&rl, "bucket chaining exceeded %d links",
876 MAX_LIVENESS_RECURSION);
880 return !ofputil_bucket_has_liveness(bucket) ||
881 (bucket->watch_port != OFPP_ANY &&
882 odp_port_is_alive(ctx, bucket->watch_port)) ||
883 (bucket->watch_group != OFPG_ANY &&
884 group_is_alive(ctx, bucket->watch_group, depth + 1));
887 static struct ofputil_bucket *
888 group_first_live_bucket(const struct xlate_ctx *ctx,
889 const struct group_dpif *group, int depth)
891 struct ofputil_bucket *bucket;
892 const struct list *buckets;
894 group_dpif_get_buckets(group, &buckets);
895 LIST_FOR_EACH (bucket, list_node, buckets) {
896 if (bucket_is_alive(ctx, bucket, depth)) {
904 static struct ofputil_bucket *
905 group_best_live_bucket(const struct xlate_ctx *ctx,
906 const struct group_dpif *group,
909 struct ofputil_bucket *best_bucket = NULL;
910 uint32_t best_score = 0;
913 struct ofputil_bucket *bucket;
914 const struct list *buckets;
916 group_dpif_get_buckets(group, &buckets);
917 LIST_FOR_EACH (bucket, list_node, buckets) {
918 if (bucket_is_alive(ctx, bucket, 0)) {
919 uint32_t score = (hash_int(i, basis) & 0xffff) * bucket->weight;
920 if (score >= best_score) {
921 best_bucket = bucket;
932 xbundle_trunks_vlan(const struct xbundle *bundle, uint16_t vlan)
934 return (bundle->vlan_mode != PORT_VLAN_ACCESS
935 && (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan)));
939 xbundle_includes_vlan(const struct xbundle *xbundle, uint16_t vlan)
941 return vlan == xbundle->vlan || xbundle_trunks_vlan(xbundle, vlan);
945 xbundle_mirror_out(const struct xbridge *xbridge, struct xbundle *xbundle)
947 return xbundle != &ofpp_none_bundle
948 ? mirror_bundle_out(xbridge->mbridge, xbundle->ofbundle)
953 xbundle_mirror_src(const struct xbridge *xbridge, struct xbundle *xbundle)
955 return xbundle != &ofpp_none_bundle
956 ? mirror_bundle_src(xbridge->mbridge, xbundle->ofbundle)
961 xbundle_mirror_dst(const struct xbridge *xbridge, struct xbundle *xbundle)
963 return xbundle != &ofpp_none_bundle
964 ? mirror_bundle_dst(xbridge->mbridge, xbundle->ofbundle)
968 static struct xbundle *
969 lookup_input_bundle(const struct xbridge *xbridge, ofp_port_t in_port,
970 bool warn, struct xport **in_xportp)
974 /* Find the port and bundle for the received packet. */
975 xport = get_ofp_port(xbridge, in_port);
979 if (xport && xport->xbundle) {
980 return xport->xbundle;
983 /* Special-case OFPP_NONE (OF1.0) and OFPP_CONTROLLER (OF1.1+),
984 * which a controller may use as the ingress port for traffic that
986 if (in_port == OFPP_CONTROLLER || in_port == OFPP_NONE) {
987 return &ofpp_none_bundle;
990 /* Odd. A few possible reasons here:
992 * - We deleted a port but there are still a few packets queued up
995 * - Someone externally added a port (e.g. "ovs-dpctl add-if") that
996 * we don't know about.
998 * - The ofproto client didn't configure the port as part of a bundle.
999 * This is particularly likely to happen if a packet was received on the
1000 * port after it was created, but before the client had a chance to
1001 * configure its bundle.
1004 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1006 VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown "
1007 "port %"PRIu16, xbridge->name, in_port);
1013 add_mirror_actions(struct xlate_ctx *ctx, const struct flow *orig_flow)
1015 const struct xbridge *xbridge = ctx->xbridge;
1016 mirror_mask_t mirrors;
1017 struct xbundle *in_xbundle;
1021 mirrors = ctx->xout->mirrors;
1022 ctx->xout->mirrors = 0;
1024 in_xbundle = lookup_input_bundle(xbridge, orig_flow->in_port.ofp_port,
1025 ctx->xin->packet != NULL, NULL);
1029 mirrors |= xbundle_mirror_src(xbridge, in_xbundle);
1031 /* Drop frames on bundles reserved for mirroring. */
1032 if (xbundle_mirror_out(xbridge, in_xbundle)) {
1033 if (ctx->xin->packet != NULL) {
1034 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1035 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
1036 "%s, which is reserved exclusively for mirroring",
1037 ctx->xbridge->name, in_xbundle->name);
1039 ofpbuf_clear(&ctx->xout->odp_actions);
1044 vid = vlan_tci_to_vid(orig_flow->vlan_tci);
1045 if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) {
1048 vlan = input_vid_to_vlan(in_xbundle, vid);
1054 /* Restore the original packet before adding the mirror actions. */
1055 ctx->xin->flow = *orig_flow;
1058 mirror_mask_t dup_mirrors;
1059 struct ofbundle *out;
1060 unsigned long *vlans;
1065 has_mirror = mirror_get(xbridge->mbridge, raw_ctz(mirrors),
1066 &vlans, &dup_mirrors, &out, &out_vlan);
1067 ovs_assert(has_mirror);
1070 ctx->xout->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK);
1072 vlan_mirrored = !vlans || bitmap_is_set(vlans, vlan);
1075 if (!vlan_mirrored) {
1076 mirrors = zero_rightmost_1bit(mirrors);
1080 mirrors &= ~dup_mirrors;
1081 ctx->xout->mirrors |= dup_mirrors;
1083 struct xbundle *out_xbundle = xbundle_lookup(out);
1085 output_normal(ctx, out_xbundle, vlan);
1087 } else if (vlan != out_vlan
1088 && !eth_addr_is_reserved(orig_flow->dl_dst)) {
1089 struct xbundle *xbundle;
1091 LIST_FOR_EACH (xbundle, list_node, &xbridge->xbundles) {
1092 if (xbundle_includes_vlan(xbundle, out_vlan)
1093 && !xbundle_mirror_out(xbridge, xbundle)) {
1094 output_normal(ctx, xbundle, out_vlan);
1101 /* Given 'vid', the VID obtained from the 802.1Q header that was received as
1102 * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle',
1103 * the bundle on which the packet was received, returns the VLAN to which the
1106 * Both 'vid' and the return value are in the range 0...4095. */
1108 input_vid_to_vlan(const struct xbundle *in_xbundle, uint16_t vid)
1110 switch (in_xbundle->vlan_mode) {
1111 case PORT_VLAN_ACCESS:
1112 return in_xbundle->vlan;
1115 case PORT_VLAN_TRUNK:
1118 case PORT_VLAN_NATIVE_UNTAGGED:
1119 case PORT_VLAN_NATIVE_TAGGED:
1120 return vid ? vid : in_xbundle->vlan;
1127 /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'.
1128 * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs
1131 * 'vid' should be the VID obtained from the 802.1Q header that was received as
1132 * part of a packet (specify 0 if there was no 802.1Q header), in the range
1135 input_vid_is_valid(uint16_t vid, struct xbundle *in_xbundle, bool warn)
1137 /* Allow any VID on the OFPP_NONE port. */
1138 if (in_xbundle == &ofpp_none_bundle) {
1142 switch (in_xbundle->vlan_mode) {
1143 case PORT_VLAN_ACCESS:
1146 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1147 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" tagged "
1148 "packet received on port %s configured as VLAN "
1149 "%"PRIu16" access port", vid, in_xbundle->name,
1156 case PORT_VLAN_NATIVE_UNTAGGED:
1157 case PORT_VLAN_NATIVE_TAGGED:
1159 /* Port must always carry its native VLAN. */
1163 case PORT_VLAN_TRUNK:
1164 if (!xbundle_includes_vlan(in_xbundle, vid)) {
1166 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1167 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" packet "
1168 "received on port %s not configured for trunking "
1169 "VLAN %"PRIu16, vid, in_xbundle->name, vid);
1181 /* Given 'vlan', the VLAN that a packet belongs to, and
1182 * 'out_xbundle', a bundle on which the packet is to be output, returns the VID
1183 * that should be included in the 802.1Q header. (If the return value is 0,
1184 * then the 802.1Q header should only be included in the packet if there is a
1187 * Both 'vlan' and the return value are in the range 0...4095. */
1189 output_vlan_to_vid(const struct xbundle *out_xbundle, uint16_t vlan)
1191 switch (out_xbundle->vlan_mode) {
1192 case PORT_VLAN_ACCESS:
1195 case PORT_VLAN_TRUNK:
1196 case PORT_VLAN_NATIVE_TAGGED:
1199 case PORT_VLAN_NATIVE_UNTAGGED:
1200 return vlan == out_xbundle->vlan ? 0 : vlan;
1208 output_normal(struct xlate_ctx *ctx, const struct xbundle *out_xbundle,
1211 ovs_be16 *flow_tci = &ctx->xin->flow.vlan_tci;
1213 ovs_be16 tci, old_tci;
1214 struct xport *xport;
1216 vid = output_vlan_to_vid(out_xbundle, vlan);
1217 if (list_is_empty(&out_xbundle->xports)) {
1218 /* Partially configured bundle with no slaves. Drop the packet. */
1220 } else if (!out_xbundle->bond) {
1221 ctx->use_recirc = false;
1222 xport = CONTAINER_OF(list_front(&out_xbundle->xports), struct xport,
1225 struct ofport_dpif *ofport;
1226 struct xlate_recirc *xr = &ctx->recirc;
1227 struct flow_wildcards *wc = &ctx->xout->wc;
1229 if (ctx->xbridge->enable_recirc) {
1230 ctx->use_recirc = bond_may_recirc(
1231 out_xbundle->bond, &xr->recirc_id, &xr->hash_basis);
1233 if (ctx->use_recirc) {
1234 /* Only TCP mode uses recirculation. */
1235 xr->hash_alg = OVS_HASH_ALG_L4;
1236 bond_update_post_recirc_rules(out_xbundle->bond, false);
1238 /* Recirculation does not require unmasking hash fields. */
1243 ofport = bond_choose_output_slave(out_xbundle->bond,
1244 &ctx->xin->flow, wc, vid);
1245 xport = xport_lookup(ofport);
1248 /* No slaves enabled, so drop packet. */
1252 /* If ctx->xout->use_recirc is set, the main thread will handle stats
1253 * accounting for this bond. */
1254 if (!ctx->use_recirc) {
1255 if (ctx->xin->resubmit_stats) {
1256 bond_account(out_xbundle->bond, &ctx->xin->flow, vid,
1257 ctx->xin->resubmit_stats->n_bytes);
1259 if (ctx->xin->xcache) {
1260 struct xc_entry *entry;
1263 flow = &ctx->xin->flow;
1264 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_BOND);
1265 entry->u.bond.bond = bond_ref(out_xbundle->bond);
1266 entry->u.bond.flow = xmemdup(flow, sizeof *flow);
1267 entry->u.bond.vid = vid;
1272 old_tci = *flow_tci;
1274 if (tci || out_xbundle->use_priority_tags) {
1275 tci |= *flow_tci & htons(VLAN_PCP_MASK);
1277 tci |= htons(VLAN_CFI);
1282 compose_output_action(ctx, xport->ofp_port);
1283 *flow_tci = old_tci;
1286 /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after
1287 * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to
1288 * indicate this; newer upstream kernels use gratuitous ARP requests. */
1290 is_gratuitous_arp(const struct flow *flow, struct flow_wildcards *wc)
1292 if (flow->dl_type != htons(ETH_TYPE_ARP)) {
1296 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1297 if (!eth_addr_is_broadcast(flow->dl_dst)) {
1301 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
1302 if (flow->nw_proto == ARP_OP_REPLY) {
1304 } else if (flow->nw_proto == ARP_OP_REQUEST) {
1305 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
1306 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
1308 return flow->nw_src == flow->nw_dst;
1314 /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or
1315 * dropped. Returns true if they may be forwarded, false if they should be
1318 * 'in_port' must be the xport that corresponds to flow->in_port.
1319 * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull).
1321 * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as
1322 * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as
1323 * checked by input_vid_is_valid().
1325 * May also add tags to '*tags', although the current implementation only does
1326 * so in one special case.
1329 is_admissible(struct xlate_ctx *ctx, struct xport *in_port,
1332 struct xbundle *in_xbundle = in_port->xbundle;
1333 const struct xbridge *xbridge = ctx->xbridge;
1334 struct flow *flow = &ctx->xin->flow;
1336 /* Drop frames for reserved multicast addresses
1337 * only if forward_bpdu option is absent. */
1338 if (!xbridge->forward_bpdu && eth_addr_is_reserved(flow->dl_dst)) {
1339 xlate_report(ctx, "packet has reserved destination MAC, dropping");
1343 if (in_xbundle->bond) {
1344 struct mac_entry *mac;
1346 switch (bond_check_admissibility(in_xbundle->bond, in_port->ofport,
1352 xlate_report(ctx, "bonding refused admissibility, dropping");
1355 case BV_DROP_IF_MOVED:
1356 ovs_rwlock_rdlock(&xbridge->ml->rwlock);
1357 mac = mac_learning_lookup(xbridge->ml, flow->dl_src, vlan);
1358 if (mac && mac->port.p != in_xbundle->ofbundle &&
1359 (!is_gratuitous_arp(flow, &ctx->xout->wc)
1360 || mac_entry_is_grat_arp_locked(mac))) {
1361 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1362 xlate_report(ctx, "SLB bond thinks this packet looped back, "
1366 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1374 /* Checks whether a MAC learning update is necessary for MAC learning table
1375 * 'ml' given that a packet matching 'flow' was received on 'in_xbundle' in
1378 * Most packets processed through the MAC learning table do not actually
1379 * change it in any way. This function requires only a read lock on the MAC
1380 * learning table, so it is much cheaper in this common case.
1382 * Keep the code here synchronized with that in update_learning_table__()
1385 is_mac_learning_update_needed(const struct mac_learning *ml,
1386 const struct flow *flow,
1387 struct flow_wildcards *wc,
1388 int vlan, struct xbundle *in_xbundle)
1389 OVS_REQ_RDLOCK(ml->rwlock)
1391 struct mac_entry *mac;
1393 if (!mac_learning_may_learn(ml, flow->dl_src, vlan)) {
1397 mac = mac_learning_lookup(ml, flow->dl_src, vlan);
1398 if (!mac || mac_entry_age(ml, mac)) {
1402 if (is_gratuitous_arp(flow, wc)) {
1403 /* We don't want to learn from gratuitous ARP packets that are
1404 * reflected back over bond slaves so we lock the learning table. */
1405 if (!in_xbundle->bond) {
1407 } else if (mac_entry_is_grat_arp_locked(mac)) {
1412 return mac->port.p != in_xbundle->ofbundle;
1416 /* Updates MAC learning table 'ml' given that a packet matching 'flow' was
1417 * received on 'in_xbundle' in 'vlan'.
1419 * This code repeats all the checks in is_mac_learning_update_needed() because
1420 * the lock was released between there and here and thus the MAC learning state
1421 * could have changed.
1423 * Keep the code here synchronized with that in is_mac_learning_update_needed()
1426 update_learning_table__(const struct xbridge *xbridge,
1427 const struct flow *flow, struct flow_wildcards *wc,
1428 int vlan, struct xbundle *in_xbundle)
1429 OVS_REQ_WRLOCK(xbridge->ml->rwlock)
1431 struct mac_entry *mac;
1433 if (!mac_learning_may_learn(xbridge->ml, flow->dl_src, vlan)) {
1437 mac = mac_learning_insert(xbridge->ml, flow->dl_src, vlan);
1438 if (is_gratuitous_arp(flow, wc)) {
1439 /* We don't want to learn from gratuitous ARP packets that are
1440 * reflected back over bond slaves so we lock the learning table. */
1441 if (!in_xbundle->bond) {
1442 mac_entry_set_grat_arp_lock(mac);
1443 } else if (mac_entry_is_grat_arp_locked(mac)) {
1448 if (mac->port.p != in_xbundle->ofbundle) {
1449 /* The log messages here could actually be useful in debugging,
1450 * so keep the rate limit relatively high. */
1451 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
1453 VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
1454 "on port %s in VLAN %d",
1455 xbridge->name, ETH_ADDR_ARGS(flow->dl_src),
1456 in_xbundle->name, vlan);
1458 mac->port.p = in_xbundle->ofbundle;
1459 mac_learning_changed(xbridge->ml);
1464 update_learning_table(const struct xbridge *xbridge,
1465 const struct flow *flow, struct flow_wildcards *wc,
1466 int vlan, struct xbundle *in_xbundle)
1470 /* Don't learn the OFPP_NONE port. */
1471 if (in_xbundle == &ofpp_none_bundle) {
1475 /* First try the common case: no change to MAC learning table. */
1476 ovs_rwlock_rdlock(&xbridge->ml->rwlock);
1477 need_update = is_mac_learning_update_needed(xbridge->ml, flow, wc, vlan,
1479 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1482 /* Slow path: MAC learning table might need an update. */
1483 ovs_rwlock_wrlock(&xbridge->ml->rwlock);
1484 update_learning_table__(xbridge, flow, wc, vlan, in_xbundle);
1485 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1490 xlate_normal_flood(struct xlate_ctx *ctx, struct xbundle *in_xbundle,
1493 struct xbundle *xbundle;
1495 LIST_FOR_EACH (xbundle, list_node, &ctx->xbridge->xbundles) {
1496 if (xbundle != in_xbundle
1497 && xbundle_includes_vlan(xbundle, vlan)
1498 && xbundle->floodable
1499 && !xbundle_mirror_out(ctx->xbridge, xbundle)) {
1500 output_normal(ctx, xbundle, vlan);
1503 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
1507 xlate_normal(struct xlate_ctx *ctx)
1509 struct flow_wildcards *wc = &ctx->xout->wc;
1510 struct flow *flow = &ctx->xin->flow;
1511 struct xbundle *in_xbundle;
1512 struct xport *in_port;
1513 struct mac_entry *mac;
1518 ctx->xout->has_normal = true;
1520 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
1521 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1522 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
1524 in_xbundle = lookup_input_bundle(ctx->xbridge, flow->in_port.ofp_port,
1525 ctx->xin->packet != NULL, &in_port);
1527 xlate_report(ctx, "no input bundle, dropping");
1531 /* Drop malformed frames. */
1532 if (flow->dl_type == htons(ETH_TYPE_VLAN) &&
1533 !(flow->vlan_tci & htons(VLAN_CFI))) {
1534 if (ctx->xin->packet != NULL) {
1535 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1536 VLOG_WARN_RL(&rl, "bridge %s: dropping packet with partial "
1537 "VLAN tag received on port %s",
1538 ctx->xbridge->name, in_xbundle->name);
1540 xlate_report(ctx, "partial VLAN tag, dropping");
1544 /* Drop frames on bundles reserved for mirroring. */
1545 if (xbundle_mirror_out(ctx->xbridge, in_xbundle)) {
1546 if (ctx->xin->packet != NULL) {
1547 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1548 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
1549 "%s, which is reserved exclusively for mirroring",
1550 ctx->xbridge->name, in_xbundle->name);
1552 xlate_report(ctx, "input port is mirror output port, dropping");
1557 vid = vlan_tci_to_vid(flow->vlan_tci);
1558 if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) {
1559 xlate_report(ctx, "disallowed VLAN VID for this input port, dropping");
1562 vlan = input_vid_to_vlan(in_xbundle, vid);
1564 /* Check other admissibility requirements. */
1565 if (in_port && !is_admissible(ctx, in_port, vlan)) {
1569 /* Learn source MAC. */
1570 if (ctx->xin->may_learn) {
1571 update_learning_table(ctx->xbridge, flow, wc, vlan, in_xbundle);
1573 if (ctx->xin->xcache) {
1574 struct xc_entry *entry;
1576 /* Save enough info to update mac learning table later. */
1577 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NORMAL);
1578 entry->u.normal.ofproto = ctx->xbridge->ofproto;
1579 entry->u.normal.flow = xmemdup(flow, sizeof *flow);
1580 entry->u.normal.vlan = vlan;
1583 /* Determine output bundle. */
1584 ovs_rwlock_rdlock(&ctx->xbridge->ml->rwlock);
1585 mac = mac_learning_lookup(ctx->xbridge->ml, flow->dl_dst, vlan);
1586 mac_port = mac ? mac->port.p : NULL;
1587 ovs_rwlock_unlock(&ctx->xbridge->ml->rwlock);
1590 struct xbundle *mac_xbundle = xbundle_lookup(mac_port);
1591 if (mac_xbundle && mac_xbundle != in_xbundle) {
1592 xlate_report(ctx, "forwarding to learned port");
1593 output_normal(ctx, mac_xbundle, vlan);
1594 } else if (!mac_xbundle) {
1595 xlate_report(ctx, "learned port is unknown, dropping");
1597 xlate_report(ctx, "learned port is input port, dropping");
1600 xlate_report(ctx, "no learned MAC for destination, flooding");
1601 xlate_normal_flood(ctx, in_xbundle, vlan);
1605 /* Compose SAMPLE action for sFlow or IPFIX. The given probability is
1606 * the number of packets out of UINT32_MAX to sample. The given
1607 * cookie is passed back in the callback for each sampled packet.
1610 compose_sample_action(const struct xbridge *xbridge,
1611 struct ofpbuf *odp_actions,
1612 const struct flow *flow,
1613 const uint32_t probability,
1614 const union user_action_cookie *cookie,
1615 const size_t cookie_size)
1617 size_t sample_offset, actions_offset;
1618 odp_port_t odp_port;
1622 sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE);
1624 nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability);
1626 actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS);
1628 odp_port = ofp_port_to_odp_port(xbridge, flow->in_port.ofp_port);
1629 pid = dpif_port_get_pid(xbridge->dpif, odp_port,
1630 flow_hash_5tuple(flow, 0));
1631 cookie_offset = odp_put_userspace_action(pid, cookie, cookie_size,
1634 nl_msg_end_nested(odp_actions, actions_offset);
1635 nl_msg_end_nested(odp_actions, sample_offset);
1636 return cookie_offset;
1640 compose_sflow_cookie(const struct xbridge *xbridge, ovs_be16 vlan_tci,
1641 odp_port_t odp_port, unsigned int n_outputs,
1642 union user_action_cookie *cookie)
1646 cookie->type = USER_ACTION_COOKIE_SFLOW;
1647 cookie->sflow.vlan_tci = vlan_tci;
1649 /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output
1650 * port information") for the interpretation of cookie->output. */
1651 switch (n_outputs) {
1653 /* 0x40000000 | 256 means "packet dropped for unknown reason". */
1654 cookie->sflow.output = 0x40000000 | 256;
1658 ifindex = dpif_sflow_odp_port_to_ifindex(xbridge->sflow, odp_port);
1660 cookie->sflow.output = ifindex;
1665 /* 0x80000000 means "multiple output ports. */
1666 cookie->sflow.output = 0x80000000 | n_outputs;
1671 /* Compose SAMPLE action for sFlow bridge sampling. */
1673 compose_sflow_action(const struct xbridge *xbridge,
1674 struct ofpbuf *odp_actions,
1675 const struct flow *flow,
1676 odp_port_t odp_port)
1678 uint32_t probability;
1679 union user_action_cookie cookie;
1681 if (!xbridge->sflow || flow->in_port.ofp_port == OFPP_NONE) {
1685 probability = dpif_sflow_get_probability(xbridge->sflow);
1686 compose_sflow_cookie(xbridge, htons(0), odp_port,
1687 odp_port == ODPP_NONE ? 0 : 1, &cookie);
1689 return compose_sample_action(xbridge, odp_actions, flow, probability,
1690 &cookie, sizeof cookie.sflow);
1694 compose_flow_sample_cookie(uint16_t probability, uint32_t collector_set_id,
1695 uint32_t obs_domain_id, uint32_t obs_point_id,
1696 union user_action_cookie *cookie)
1698 cookie->type = USER_ACTION_COOKIE_FLOW_SAMPLE;
1699 cookie->flow_sample.probability = probability;
1700 cookie->flow_sample.collector_set_id = collector_set_id;
1701 cookie->flow_sample.obs_domain_id = obs_domain_id;
1702 cookie->flow_sample.obs_point_id = obs_point_id;
1706 compose_ipfix_cookie(union user_action_cookie *cookie)
1708 cookie->type = USER_ACTION_COOKIE_IPFIX;
1711 /* Compose SAMPLE action for IPFIX bridge sampling. */
1713 compose_ipfix_action(const struct xbridge *xbridge,
1714 struct ofpbuf *odp_actions,
1715 const struct flow *flow)
1717 uint32_t probability;
1718 union user_action_cookie cookie;
1720 if (!xbridge->ipfix || flow->in_port.ofp_port == OFPP_NONE) {
1724 probability = dpif_ipfix_get_bridge_exporter_probability(xbridge->ipfix);
1725 compose_ipfix_cookie(&cookie);
1727 compose_sample_action(xbridge, odp_actions, flow, probability,
1728 &cookie, sizeof cookie.ipfix);
1731 /* SAMPLE action for sFlow must be first action in any given list of
1732 * actions. At this point we do not have all information required to
1733 * build it. So try to build sample action as complete as possible. */
1735 add_sflow_action(struct xlate_ctx *ctx)
1737 ctx->user_cookie_offset = compose_sflow_action(ctx->xbridge,
1738 &ctx->xout->odp_actions,
1739 &ctx->xin->flow, ODPP_NONE);
1740 ctx->sflow_odp_port = 0;
1741 ctx->sflow_n_outputs = 0;
1744 /* SAMPLE action for IPFIX must be 1st or 2nd action in any given list
1745 * of actions, eventually after the SAMPLE action for sFlow. */
1747 add_ipfix_action(struct xlate_ctx *ctx)
1749 compose_ipfix_action(ctx->xbridge, &ctx->xout->odp_actions,
1753 /* Fix SAMPLE action according to data collected while composing ODP actions.
1754 * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested
1755 * USERSPACE action's user-cookie which is required for sflow. */
1757 fix_sflow_action(struct xlate_ctx *ctx)
1759 const struct flow *base = &ctx->base_flow;
1760 union user_action_cookie *cookie;
1762 if (!ctx->user_cookie_offset) {
1766 cookie = ofpbuf_at(&ctx->xout->odp_actions, ctx->user_cookie_offset,
1767 sizeof cookie->sflow);
1768 ovs_assert(cookie->type == USER_ACTION_COOKIE_SFLOW);
1770 compose_sflow_cookie(ctx->xbridge, base->vlan_tci,
1771 ctx->sflow_odp_port, ctx->sflow_n_outputs, cookie);
1774 static enum slow_path_reason
1775 process_special(struct xlate_ctx *ctx, const struct flow *flow,
1776 const struct xport *xport, const struct ofpbuf *packet)
1778 struct flow_wildcards *wc = &ctx->xout->wc;
1779 const struct xbridge *xbridge = ctx->xbridge;
1783 } else if (xport->cfm && cfm_should_process_flow(xport->cfm, flow, wc)) {
1785 cfm_process_heartbeat(xport->cfm, packet);
1788 } else if (xport->bfd && bfd_should_process_flow(xport->bfd, flow, wc)) {
1790 bfd_process_packet(xport->bfd, flow, packet);
1791 /* If POLL received, immediately sends FINAL back. */
1792 if (bfd_should_send_packet(xport->bfd)) {
1793 ofproto_dpif_monitor_port_send_soon(xport->ofport);
1797 } else if (xport->xbundle && xport->xbundle->lacp
1798 && flow->dl_type == htons(ETH_TYPE_LACP)) {
1800 lacp_process_packet(xport->xbundle->lacp, xport->ofport, packet);
1803 } else if (xbridge->stp && stp_should_process_flow(flow, wc)) {
1805 stp_process_packet(xport, packet);
1814 compose_output_action__(struct xlate_ctx *ctx, ofp_port_t ofp_port,
1817 const struct xport *xport = get_ofp_port(ctx->xbridge, ofp_port);
1818 struct flow_wildcards *wc = &ctx->xout->wc;
1819 struct flow *flow = &ctx->xin->flow;
1820 ovs_be16 flow_vlan_tci;
1821 uint32_t flow_pkt_mark;
1822 uint8_t flow_nw_tos;
1823 odp_port_t out_port, odp_port;
1826 /* If 'struct flow' gets additional metadata, we'll need to zero it out
1827 * before traversing a patch port. */
1828 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 26);
1831 xlate_report(ctx, "Nonexistent output port");
1833 } else if (xport->config & OFPUTIL_PC_NO_FWD) {
1834 xlate_report(ctx, "OFPPC_NO_FWD set, skipping output");
1836 } else if (check_stp) {
1837 if (is_stp(&ctx->base_flow)) {
1838 if (!xport_stp_listen_state(xport)) {
1839 xlate_report(ctx, "STP not in listening state, "
1840 "skipping bpdu output");
1843 } else if (!xport_stp_forward_state(xport)) {
1844 xlate_report(ctx, "STP not in forwarding state, "
1850 if (mbridge_has_mirrors(ctx->xbridge->mbridge) && xport->xbundle) {
1851 ctx->xout->mirrors |= xbundle_mirror_dst(xport->xbundle->xbridge,
1856 const struct xport *peer = xport->peer;
1857 struct flow old_flow = ctx->xin->flow;
1858 enum slow_path_reason special;
1860 ctx->xbridge = peer->xbridge;
1861 flow->in_port.ofp_port = peer->ofp_port;
1862 flow->metadata = htonll(0);
1863 memset(&flow->tunnel, 0, sizeof flow->tunnel);
1864 memset(flow->regs, 0, sizeof flow->regs);
1866 special = process_special(ctx, &ctx->xin->flow, peer,
1869 ctx->xout->slow |= special;
1870 } else if (may_receive(peer, ctx)) {
1871 if (xport_stp_forward_state(peer)) {
1872 xlate_table_action(ctx, flow->in_port.ofp_port, 0, true, true);
1874 /* Forwarding is disabled by STP. Let OFPP_NORMAL and the
1875 * learning action look at the packet, then drop it. */
1876 struct flow old_base_flow = ctx->base_flow;
1877 size_t old_size = ofpbuf_size(&ctx->xout->odp_actions);
1878 mirror_mask_t old_mirrors = ctx->xout->mirrors;
1879 xlate_table_action(ctx, flow->in_port.ofp_port, 0, true, true);
1880 ctx->xout->mirrors = old_mirrors;
1881 ctx->base_flow = old_base_flow;
1882 ofpbuf_set_size(&ctx->xout->odp_actions, old_size);
1886 ctx->xin->flow = old_flow;
1887 ctx->xbridge = xport->xbridge;
1889 if (ctx->xin->resubmit_stats) {
1890 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
1891 netdev_vport_inc_rx(peer->netdev, ctx->xin->resubmit_stats);
1893 bfd_account_rx(peer->bfd, ctx->xin->resubmit_stats);
1896 if (ctx->xin->xcache) {
1897 struct xc_entry *entry;
1899 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NETDEV);
1900 entry->u.dev.tx = netdev_ref(xport->netdev);
1901 entry->u.dev.rx = netdev_ref(peer->netdev);
1902 entry->u.dev.bfd = bfd_ref(peer->bfd);
1908 flow_vlan_tci = flow->vlan_tci;
1909 flow_pkt_mark = flow->pkt_mark;
1910 flow_nw_tos = flow->nw_tos;
1912 if (dscp_from_skb_priority(xport, flow->skb_priority, &dscp)) {
1913 wc->masks.nw_tos |= IP_DSCP_MASK;
1914 flow->nw_tos &= ~IP_DSCP_MASK;
1915 flow->nw_tos |= dscp;
1918 if (xport->is_tunnel) {
1919 /* Save tunnel metadata so that changes made due to
1920 * the Logical (tunnel) Port are not visible for any further
1921 * matches, while explicit set actions on tunnel metadata are.
1923 struct flow_tnl flow_tnl = flow->tunnel;
1924 odp_port = tnl_port_send(xport->ofport, flow, &ctx->xout->wc);
1925 if (odp_port == ODPP_NONE) {
1926 xlate_report(ctx, "Tunneling decided against output");
1927 goto out; /* restore flow_nw_tos */
1929 if (flow->tunnel.ip_dst == ctx->orig_tunnel_ip_dst) {
1930 xlate_report(ctx, "Not tunneling to our own address");
1931 goto out; /* restore flow_nw_tos */
1933 if (ctx->xin->resubmit_stats) {
1934 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
1936 if (ctx->xin->xcache) {
1937 struct xc_entry *entry;
1939 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NETDEV);
1940 entry->u.dev.tx = netdev_ref(xport->netdev);
1942 out_port = odp_port;
1943 commit_odp_tunnel_action(flow, &ctx->base_flow,
1944 &ctx->xout->odp_actions);
1945 flow->tunnel = flow_tnl; /* Restore tunnel metadata */
1947 odp_port = xport->odp_port;
1948 out_port = odp_port;
1949 if (ofproto_has_vlan_splinters(ctx->xbridge->ofproto)) {
1950 ofp_port_t vlandev_port;
1952 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
1953 vlandev_port = vsp_realdev_to_vlandev(ctx->xbridge->ofproto,
1954 ofp_port, flow->vlan_tci);
1955 if (vlandev_port != ofp_port) {
1956 out_port = ofp_port_to_odp_port(ctx->xbridge, vlandev_port);
1957 flow->vlan_tci = htons(0);
1962 if (out_port != ODPP_NONE) {
1963 ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow,
1964 &ctx->xout->odp_actions,
1967 if (ctx->use_recirc) {
1968 struct ovs_action_hash *act_hash;
1969 struct xlate_recirc *xr = &ctx->recirc;
1972 act_hash = nl_msg_put_unspec_uninit(&ctx->xout->odp_actions,
1973 OVS_ACTION_ATTR_HASH,
1975 act_hash->hash_alg = xr->hash_alg;
1976 act_hash->hash_basis = xr->hash_basis;
1978 /* Recirc action. */
1979 nl_msg_put_u32(&ctx->xout->odp_actions, OVS_ACTION_ATTR_RECIRC,
1982 nl_msg_put_odp_port(&ctx->xout->odp_actions, OVS_ACTION_ATTR_OUTPUT,
1986 ctx->sflow_odp_port = odp_port;
1987 ctx->sflow_n_outputs++;
1988 ctx->xout->nf_output_iface = ofp_port;
1993 flow->vlan_tci = flow_vlan_tci;
1994 flow->pkt_mark = flow_pkt_mark;
1995 flow->nw_tos = flow_nw_tos;
1999 compose_output_action(struct xlate_ctx *ctx, ofp_port_t ofp_port)
2001 compose_output_action__(ctx, ofp_port, true);
2005 xlate_recursively(struct xlate_ctx *ctx, struct rule_dpif *rule)
2007 struct rule_dpif *old_rule = ctx->rule;
2008 const struct rule_actions *actions;
2010 if (ctx->xin->resubmit_stats) {
2011 rule_dpif_credit_stats(rule, ctx->xin->resubmit_stats);
2017 actions = rule_dpif_get_actions(rule);
2018 do_xlate_actions(actions->ofpacts, actions->ofpacts_len, ctx);
2019 ctx->rule = old_rule;
2024 xlate_resubmit_resource_check(struct xlate_ctx *ctx)
2026 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
2028 if (ctx->recurse >= MAX_RESUBMIT_RECURSION + MAX_INTERNAL_RESUBMITS) {
2029 VLOG_ERR_RL(&rl, "resubmit actions recursed over %d times",
2030 MAX_RESUBMIT_RECURSION);
2031 } else if (ctx->resubmits >= MAX_RESUBMITS + MAX_INTERNAL_RESUBMITS) {
2032 VLOG_ERR_RL(&rl, "over %d resubmit actions", MAX_RESUBMITS);
2033 } else if (ofpbuf_size(&ctx->xout->odp_actions) > UINT16_MAX) {
2034 VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of actions");
2035 } else if (ofpbuf_size(&ctx->stack) >= 65536) {
2036 VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of stack");
2045 xlate_table_action(struct xlate_ctx *ctx, ofp_port_t in_port, uint8_t table_id,
2046 bool may_packet_in, bool honor_table_miss)
2048 if (xlate_resubmit_resource_check(ctx)) {
2049 ofp_port_t old_in_port = ctx->xin->flow.in_port.ofp_port;
2050 bool skip_wildcards = ctx->xin->skip_wildcards;
2051 uint8_t old_table_id = ctx->table_id;
2052 struct rule_dpif *rule;
2053 enum rule_dpif_lookup_verdict verdict;
2054 enum ofputil_port_config config = 0;
2056 ctx->table_id = table_id;
2058 /* Look up a flow with 'in_port' as the input port. Then restore the
2059 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
2060 * have surprising behavior). */
2061 ctx->xin->flow.in_port.ofp_port = in_port;
2062 verdict = rule_dpif_lookup_from_table(ctx->xbridge->ofproto,
2065 ? &ctx->xout->wc : NULL,
2067 &ctx->table_id, &rule,
2068 ctx->xin->xcache != NULL,
2069 ctx->xin->resubmit_stats);
2070 ctx->xin->flow.in_port.ofp_port = old_in_port;
2072 if (ctx->xin->resubmit_hook) {
2073 ctx->xin->resubmit_hook(ctx->xin, rule, ctx->recurse);
2077 case RULE_DPIF_LOOKUP_VERDICT_MATCH:
2079 case RULE_DPIF_LOOKUP_VERDICT_CONTROLLER:
2080 if (may_packet_in) {
2081 struct xport *xport;
2083 xport = get_ofp_port(ctx->xbridge,
2084 ctx->xin->flow.in_port.ofp_port);
2085 config = xport ? xport->config : 0;
2088 /* Fall through to drop */
2089 case RULE_DPIF_LOOKUP_VERDICT_DROP:
2090 config = OFPUTIL_PC_NO_PACKET_IN;
2092 case RULE_DPIF_LOOKUP_VERDICT_DEFAULT:
2093 if (!ofproto_dpif_wants_packet_in_on_miss(ctx->xbridge->ofproto)) {
2094 config = OFPUTIL_PC_NO_PACKET_IN;
2101 choose_miss_rule(config, ctx->xbridge->miss_rule,
2102 ctx->xbridge->no_packet_in_rule, &rule,
2103 ctx->xin->xcache != NULL);
2107 /* Fill in the cache entry here instead of xlate_recursively
2108 * to make the reference counting more explicit. We take a
2109 * reference in the lookups above if we are going to cache the
2111 if (ctx->xin->xcache) {
2112 struct xc_entry *entry;
2114 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_RULE);
2115 entry->u.rule = rule;
2117 xlate_recursively(ctx, rule);
2120 ctx->table_id = old_table_id;
2128 xlate_group_stats(struct xlate_ctx *ctx, struct group_dpif *group,
2129 struct ofputil_bucket *bucket)
2131 if (ctx->xin->resubmit_stats) {
2132 group_dpif_credit_stats(group, bucket, ctx->xin->resubmit_stats);
2134 if (ctx->xin->xcache) {
2135 struct xc_entry *entry;
2137 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_GROUP);
2138 entry->u.group.group = group_dpif_ref(group);
2139 entry->u.group.bucket = bucket;
2144 xlate_group_bucket(struct xlate_ctx *ctx, struct ofputil_bucket *bucket)
2146 uint64_t action_list_stub[1024 / 8];
2147 struct ofpbuf action_list, action_set;
2149 ofpbuf_use_const(&action_set, bucket->ofpacts, bucket->ofpacts_len);
2150 ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub);
2152 ofpacts_execute_action_set(&action_list, &action_set);
2154 do_xlate_actions(ofpbuf_data(&action_list), ofpbuf_size(&action_list), ctx);
2157 ofpbuf_uninit(&action_set);
2158 ofpbuf_uninit(&action_list);
2162 xlate_all_group(struct xlate_ctx *ctx, struct group_dpif *group)
2164 struct ofputil_bucket *bucket;
2165 const struct list *buckets;
2166 struct flow old_flow = ctx->xin->flow;
2168 group_dpif_get_buckets(group, &buckets);
2170 LIST_FOR_EACH (bucket, list_node, buckets) {
2171 xlate_group_bucket(ctx, bucket);
2172 /* Roll back flow to previous state.
2173 * This is equivalent to cloning the packet for each bucket.
2175 * As a side effect any subsequently applied actions will
2176 * also effectively be applied to a clone of the packet taken
2177 * just before applying the all or indirect group. */
2178 ctx->xin->flow = old_flow;
2180 xlate_group_stats(ctx, group, NULL);
2184 xlate_ff_group(struct xlate_ctx *ctx, struct group_dpif *group)
2186 struct ofputil_bucket *bucket;
2188 bucket = group_first_live_bucket(ctx, group, 0);
2190 xlate_group_bucket(ctx, bucket);
2191 xlate_group_stats(ctx, group, bucket);
2196 xlate_select_group(struct xlate_ctx *ctx, struct group_dpif *group)
2198 struct flow_wildcards *wc = &ctx->xout->wc;
2199 struct ofputil_bucket *bucket;
2202 basis = hash_mac(ctx->xin->flow.dl_dst, 0, 0);
2203 bucket = group_best_live_bucket(ctx, group, basis);
2205 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
2206 xlate_group_bucket(ctx, bucket);
2207 xlate_group_stats(ctx, group, bucket);
2212 xlate_group_action__(struct xlate_ctx *ctx, struct group_dpif *group)
2214 ctx->in_group = true;
2216 switch (group_dpif_get_type(group)) {
2218 case OFPGT11_INDIRECT:
2219 xlate_all_group(ctx, group);
2221 case OFPGT11_SELECT:
2222 xlate_select_group(ctx, group);
2225 xlate_ff_group(ctx, group);
2230 group_dpif_unref(group);
2232 ctx->in_group = false;
2236 xlate_group_resource_check(struct xlate_ctx *ctx)
2238 if (!xlate_resubmit_resource_check(ctx)) {
2240 } else if (ctx->in_group) {
2241 /* Prevent nested translation of OpenFlow groups.
2243 * OpenFlow allows this restriction. We enforce this restriction only
2244 * because, with the current architecture, we would otherwise have to
2245 * take a possibly recursive read lock on the ofgroup rwlock, which is
2246 * unsafe given that POSIX allows taking a read lock to block if there
2247 * is a thread blocked on taking the write lock. Other solutions
2248 * without this restriction are also possible, but seem unwarranted
2249 * given the current limited use of groups. */
2250 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
2252 VLOG_ERR_RL(&rl, "cannot recursively translate OpenFlow group");
2260 xlate_group_action(struct xlate_ctx *ctx, uint32_t group_id)
2262 if (xlate_group_resource_check(ctx)) {
2263 struct group_dpif *group;
2266 got_group = group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group);
2268 xlate_group_action__(ctx, group);
2278 xlate_ofpact_resubmit(struct xlate_ctx *ctx,
2279 const struct ofpact_resubmit *resubmit)
2283 bool may_packet_in = false;
2284 bool honor_table_miss = false;
2286 if (ctx->rule && rule_dpif_is_internal(ctx->rule)) {
2287 /* Still allow missed packets to be sent to the controller
2288 * if resubmitting from an internal table. */
2289 may_packet_in = true;
2290 honor_table_miss = true;
2293 in_port = resubmit->in_port;
2294 if (in_port == OFPP_IN_PORT) {
2295 in_port = ctx->xin->flow.in_port.ofp_port;
2298 table_id = resubmit->table_id;
2299 if (table_id == 255) {
2300 table_id = ctx->table_id;
2303 xlate_table_action(ctx, in_port, table_id, may_packet_in,
2308 flood_packets(struct xlate_ctx *ctx, bool all)
2310 const struct xport *xport;
2312 HMAP_FOR_EACH (xport, ofp_node, &ctx->xbridge->xports) {
2313 if (xport->ofp_port == ctx->xin->flow.in_port.ofp_port) {
2318 compose_output_action__(ctx, xport->ofp_port, false);
2319 } else if (!(xport->config & OFPUTIL_PC_NO_FLOOD)) {
2320 compose_output_action(ctx, xport->ofp_port);
2324 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
2328 execute_controller_action(struct xlate_ctx *ctx, int len,
2329 enum ofp_packet_in_reason reason,
2330 uint16_t controller_id)
2332 struct ofproto_packet_in *pin;
2333 struct ofpbuf *packet;
2334 struct pkt_metadata md = PKT_METADATA_INITIALIZER(0);
2336 ctx->xout->slow |= SLOW_CONTROLLER;
2337 if (!ctx->xin->packet) {
2341 packet = ofpbuf_clone(ctx->xin->packet);
2343 ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
2344 &ctx->xout->odp_actions,
2347 odp_execute_actions(NULL, packet, false, &md,
2348 ofpbuf_data(&ctx->xout->odp_actions),
2349 ofpbuf_size(&ctx->xout->odp_actions), NULL);
2351 pin = xmalloc(sizeof *pin);
2352 pin->up.packet_len = ofpbuf_size(packet);
2353 pin->up.packet = ofpbuf_steal_data(packet);
2354 pin->up.reason = reason;
2355 pin->up.table_id = ctx->table_id;
2356 pin->up.cookie = (ctx->rule
2357 ? rule_dpif_get_flow_cookie(ctx->rule)
2360 flow_get_metadata(&ctx->xin->flow, &pin->up.fmd);
2362 pin->controller_id = controller_id;
2363 pin->send_len = len;
2364 /* If a rule is a table-miss rule then this is
2365 * a table-miss handled by a table-miss rule.
2367 * Else, if rule is internal and has a controller action,
2368 * the later being implied by the rule being processed here,
2369 * then this is a table-miss handled without a table-miss rule.
2371 * Otherwise this is not a table-miss. */
2372 pin->miss_type = OFPROTO_PACKET_IN_NO_MISS;
2374 if (rule_dpif_is_table_miss(ctx->rule)) {
2375 pin->miss_type = OFPROTO_PACKET_IN_MISS_FLOW;
2376 } else if (rule_dpif_is_internal(ctx->rule)) {
2377 pin->miss_type = OFPROTO_PACKET_IN_MISS_WITHOUT_FLOW;
2380 ofproto_dpif_send_packet_in(ctx->xbridge->ofproto, pin);
2381 ofpbuf_delete(packet);
2385 compose_mpls_push_action(struct xlate_ctx *ctx, struct ofpact_push_mpls *mpls)
2387 struct flow_wildcards *wc = &ctx->xout->wc;
2388 struct flow *flow = &ctx->xin->flow;
2391 ovs_assert(eth_type_mpls(mpls->ethertype));
2393 n = flow_count_mpls_labels(flow, wc);
2395 ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow,
2396 &ctx->xout->odp_actions,
2398 } else if (n >= FLOW_MAX_MPLS_LABELS) {
2399 if (ctx->xin->packet != NULL) {
2400 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2401 VLOG_WARN_RL(&rl, "bridge %s: dropping packet on which an "
2402 "MPLS push action can't be performed as it would "
2403 "have more MPLS LSEs than the %d supported.",
2404 ctx->xbridge->name, FLOW_MAX_MPLS_LABELS);
2408 } else if (n >= ctx->xbridge->max_mpls_depth) {
2409 COVERAGE_INC(xlate_actions_mpls_overflow);
2410 ctx->xout->slow |= SLOW_ACTION;
2413 flow_push_mpls(flow, n, mpls->ethertype, wc);
2417 compose_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type)
2419 struct flow_wildcards *wc = &ctx->xout->wc;
2420 struct flow *flow = &ctx->xin->flow;
2421 int n = flow_count_mpls_labels(flow, wc);
2423 if (!flow_pop_mpls(flow, n, eth_type, wc) && n >= FLOW_MAX_MPLS_LABELS) {
2424 if (ctx->xin->packet != NULL) {
2425 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2426 VLOG_WARN_RL(&rl, "bridge %s: dropping packet on which an "
2427 "MPLS pop action can't be performed as it has "
2428 "more MPLS LSEs than the %d supported.",
2429 ctx->xbridge->name, FLOW_MAX_MPLS_LABELS);
2432 ofpbuf_clear(&ctx->xout->odp_actions);
2437 compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids)
2439 struct flow *flow = &ctx->xin->flow;
2441 if (!is_ip_any(flow)) {
2445 ctx->xout->wc.masks.nw_ttl = 0xff;
2446 if (flow->nw_ttl > 1) {
2452 for (i = 0; i < ids->n_controllers; i++) {
2453 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL,
2457 /* Stop processing for current table. */
2463 compose_set_mpls_label_action(struct xlate_ctx *ctx, ovs_be32 label)
2465 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
2466 ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_LABEL_MASK);
2467 set_mpls_lse_label(&ctx->xin->flow.mpls_lse[0], label);
2472 compose_set_mpls_tc_action(struct xlate_ctx *ctx, uint8_t tc)
2474 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
2475 ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_TC_MASK);
2476 set_mpls_lse_tc(&ctx->xin->flow.mpls_lse[0], tc);
2481 compose_set_mpls_ttl_action(struct xlate_ctx *ctx, uint8_t ttl)
2483 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
2484 ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_TTL_MASK);
2485 set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse[0], ttl);
2490 compose_dec_mpls_ttl_action(struct xlate_ctx *ctx)
2492 struct flow *flow = &ctx->xin->flow;
2493 uint8_t ttl = mpls_lse_to_ttl(flow->mpls_lse[0]);
2494 struct flow_wildcards *wc = &ctx->xout->wc;
2496 memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse);
2497 if (eth_type_mpls(flow->dl_type)) {
2500 set_mpls_lse_ttl(&flow->mpls_lse[0], ttl);
2503 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, 0);
2505 /* Stop processing for current table. */
2514 xlate_output_action(struct xlate_ctx *ctx,
2515 ofp_port_t port, uint16_t max_len, bool may_packet_in)
2517 ofp_port_t prev_nf_output_iface = ctx->xout->nf_output_iface;
2519 ctx->xout->nf_output_iface = NF_OUT_DROP;
2523 compose_output_action(ctx, ctx->xin->flow.in_port.ofp_port);
2526 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
2527 0, may_packet_in, true);
2533 flood_packets(ctx, false);
2536 flood_packets(ctx, true);
2538 case OFPP_CONTROLLER:
2539 execute_controller_action(ctx, max_len, OFPR_ACTION, 0);
2545 if (port != ctx->xin->flow.in_port.ofp_port) {
2546 compose_output_action(ctx, port);
2548 xlate_report(ctx, "skipping output to input port");
2553 if (prev_nf_output_iface == NF_OUT_FLOOD) {
2554 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
2555 } else if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
2556 ctx->xout->nf_output_iface = prev_nf_output_iface;
2557 } else if (prev_nf_output_iface != NF_OUT_DROP &&
2558 ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
2559 ctx->xout->nf_output_iface = NF_OUT_MULTI;
2564 xlate_output_reg_action(struct xlate_ctx *ctx,
2565 const struct ofpact_output_reg *or)
2567 uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow);
2568 if (port <= UINT16_MAX) {
2569 union mf_subvalue value;
2571 memset(&value, 0xff, sizeof value);
2572 mf_write_subfield_flow(&or->src, &value, &ctx->xout->wc.masks);
2573 xlate_output_action(ctx, u16_to_ofp(port),
2574 or->max_len, false);
2579 xlate_enqueue_action(struct xlate_ctx *ctx,
2580 const struct ofpact_enqueue *enqueue)
2582 ofp_port_t ofp_port = enqueue->port;
2583 uint32_t queue_id = enqueue->queue;
2584 uint32_t flow_priority, priority;
2587 /* Translate queue to priority. */
2588 error = dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &priority);
2590 /* Fall back to ordinary output action. */
2591 xlate_output_action(ctx, enqueue->port, 0, false);
2595 /* Check output port. */
2596 if (ofp_port == OFPP_IN_PORT) {
2597 ofp_port = ctx->xin->flow.in_port.ofp_port;
2598 } else if (ofp_port == ctx->xin->flow.in_port.ofp_port) {
2602 /* Add datapath actions. */
2603 flow_priority = ctx->xin->flow.skb_priority;
2604 ctx->xin->flow.skb_priority = priority;
2605 compose_output_action(ctx, ofp_port);
2606 ctx->xin->flow.skb_priority = flow_priority;
2608 /* Update NetFlow output port. */
2609 if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
2610 ctx->xout->nf_output_iface = ofp_port;
2611 } else if (ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
2612 ctx->xout->nf_output_iface = NF_OUT_MULTI;
2617 xlate_set_queue_action(struct xlate_ctx *ctx, uint32_t queue_id)
2619 uint32_t skb_priority;
2621 if (!dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &skb_priority)) {
2622 ctx->xin->flow.skb_priority = skb_priority;
2624 /* Couldn't translate queue to a priority. Nothing to do. A warning
2625 * has already been logged. */
2630 slave_enabled_cb(ofp_port_t ofp_port, void *xbridge_)
2632 const struct xbridge *xbridge = xbridge_;
2643 case OFPP_CONTROLLER: /* Not supported by the bundle action. */
2646 port = get_ofp_port(xbridge, ofp_port);
2647 return port ? port->may_enable : false;
2652 xlate_bundle_action(struct xlate_ctx *ctx,
2653 const struct ofpact_bundle *bundle)
2657 port = bundle_execute(bundle, &ctx->xin->flow, &ctx->xout->wc,
2659 CONST_CAST(struct xbridge *, ctx->xbridge));
2660 if (bundle->dst.field) {
2661 nxm_reg_load(&bundle->dst, ofp_to_u16(port), &ctx->xin->flow,
2664 xlate_output_action(ctx, port, 0, false);
2669 xlate_learn_action(struct xlate_ctx *ctx,
2670 const struct ofpact_learn *learn)
2672 uint64_t ofpacts_stub[1024 / 8];
2673 struct ofputil_flow_mod fm;
2674 struct ofpbuf ofpacts;
2676 ctx->xout->has_learn = true;
2678 learn_mask(learn, &ctx->xout->wc);
2680 if (!ctx->xin->may_learn) {
2684 ofpbuf_use_stub(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
2685 learn_execute(learn, &ctx->xin->flow, &fm, &ofpacts);
2686 ofproto_dpif_flow_mod(ctx->xbridge->ofproto, &fm);
2687 ofpbuf_uninit(&ofpacts);
2689 if (ctx->xin->xcache) {
2690 struct xc_entry *entry;
2692 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_LEARN);
2693 entry->u.learn.ofproto = ctx->xin->ofproto;
2694 /* Lookup the learned rule, taking a reference on it. The reference
2695 * is released when this cache entry is deleted. */
2696 rule_dpif_lookup(ctx->xbridge->ofproto, &ctx->xin->flow, NULL,
2697 &entry->u.learn.rule, true, NULL);
2702 xlate_fin_timeout__(struct rule_dpif *rule, uint16_t tcp_flags,
2703 uint16_t idle_timeout, uint16_t hard_timeout)
2705 if (tcp_flags & (TCP_FIN | TCP_RST)) {
2706 rule_dpif_reduce_timeouts(rule, idle_timeout, hard_timeout);
2711 xlate_fin_timeout(struct xlate_ctx *ctx,
2712 const struct ofpact_fin_timeout *oft)
2715 xlate_fin_timeout__(ctx->rule, ctx->xin->tcp_flags,
2716 oft->fin_idle_timeout, oft->fin_hard_timeout);
2717 if (ctx->xin->xcache) {
2718 struct xc_entry *entry;
2720 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_FIN_TIMEOUT);
2721 /* XC_RULE already holds a reference on the rule, none is taken
2723 entry->u.fin.rule = ctx->rule;
2724 entry->u.fin.idle = oft->fin_idle_timeout;
2725 entry->u.fin.hard = oft->fin_hard_timeout;
2731 xlate_sample_action(struct xlate_ctx *ctx,
2732 const struct ofpact_sample *os)
2734 union user_action_cookie cookie;
2735 /* Scale the probability from 16-bit to 32-bit while representing
2736 * the same percentage. */
2737 uint32_t probability = (os->probability << 16) | os->probability;
2739 if (!ctx->xbridge->variable_length_userdata) {
2740 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
2742 VLOG_ERR_RL(&rl, "ignoring NXAST_SAMPLE action because datapath "
2743 "lacks support (needs Linux 3.10+ or kernel module from "
2748 ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
2749 &ctx->xout->odp_actions,
2752 compose_flow_sample_cookie(os->probability, os->collector_set_id,
2753 os->obs_domain_id, os->obs_point_id, &cookie);
2754 compose_sample_action(ctx->xbridge, &ctx->xout->odp_actions, &ctx->xin->flow,
2755 probability, &cookie, sizeof cookie.flow_sample);
2759 may_receive(const struct xport *xport, struct xlate_ctx *ctx)
2761 if (xport->config & (is_stp(&ctx->xin->flow)
2762 ? OFPUTIL_PC_NO_RECV_STP
2763 : OFPUTIL_PC_NO_RECV)) {
2767 /* Only drop packets here if both forwarding and learning are
2768 * disabled. If just learning is enabled, we need to have
2769 * OFPP_NORMAL and the learning action have a look at the packet
2770 * before we can drop it. */
2771 if (!xport_stp_forward_state(xport) && !xport_stp_learn_state(xport)) {
2779 xlate_write_actions(struct xlate_ctx *ctx, const struct ofpact *a)
2781 struct ofpact_nest *on = ofpact_get_WRITE_ACTIONS(a);
2782 ofpbuf_put(&ctx->action_set, on->actions, ofpact_nest_get_action_len(on));
2783 ofpact_pad(&ctx->action_set);
2787 xlate_action_set(struct xlate_ctx *ctx)
2789 uint64_t action_list_stub[1024 / 64];
2790 struct ofpbuf action_list;
2792 ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub);
2793 ofpacts_execute_action_set(&action_list, &ctx->action_set);
2794 do_xlate_actions(ofpbuf_data(&action_list), ofpbuf_size(&action_list), ctx);
2795 ofpbuf_uninit(&action_list);
2799 do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len,
2800 struct xlate_ctx *ctx)
2802 struct flow_wildcards *wc = &ctx->xout->wc;
2803 struct flow *flow = &ctx->xin->flow;
2804 const struct ofpact *a;
2806 /* dl_type already in the mask, not set below. */
2808 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
2809 struct ofpact_controller *controller;
2810 const struct ofpact_metadata *metadata;
2811 const struct ofpact_set_field *set_field;
2812 const struct mf_field *mf;
2820 xlate_output_action(ctx, ofpact_get_OUTPUT(a)->port,
2821 ofpact_get_OUTPUT(a)->max_len, true);
2825 if (xlate_group_action(ctx, ofpact_get_GROUP(a)->group_id)) {
2830 case OFPACT_CONTROLLER:
2831 controller = ofpact_get_CONTROLLER(a);
2832 execute_controller_action(ctx, controller->max_len,
2834 controller->controller_id);
2837 case OFPACT_ENQUEUE:
2838 xlate_enqueue_action(ctx, ofpact_get_ENQUEUE(a));
2841 case OFPACT_SET_VLAN_VID:
2842 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
2843 if (flow->vlan_tci & htons(VLAN_CFI) ||
2844 ofpact_get_SET_VLAN_VID(a)->push_vlan_if_needed) {
2845 flow->vlan_tci &= ~htons(VLAN_VID_MASK);
2846 flow->vlan_tci |= (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid)
2851 case OFPACT_SET_VLAN_PCP:
2852 wc->masks.vlan_tci |= htons(VLAN_PCP_MASK | VLAN_CFI);
2853 if (flow->vlan_tci & htons(VLAN_CFI) ||
2854 ofpact_get_SET_VLAN_PCP(a)->push_vlan_if_needed) {
2855 flow->vlan_tci &= ~htons(VLAN_PCP_MASK);
2856 flow->vlan_tci |= htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp
2857 << VLAN_PCP_SHIFT) | VLAN_CFI);
2861 case OFPACT_STRIP_VLAN:
2862 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
2863 flow->vlan_tci = htons(0);
2866 case OFPACT_PUSH_VLAN:
2867 /* XXX 802.1AD(QinQ) */
2868 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
2869 flow->vlan_tci = htons(VLAN_CFI);
2872 case OFPACT_SET_ETH_SRC:
2873 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
2874 memcpy(flow->dl_src, ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN);
2877 case OFPACT_SET_ETH_DST:
2878 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
2879 memcpy(flow->dl_dst, ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN);
2882 case OFPACT_SET_IPV4_SRC:
2883 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2884 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
2885 flow->nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4;
2889 case OFPACT_SET_IPV4_DST:
2890 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2891 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
2892 flow->nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4;
2896 case OFPACT_SET_IP_DSCP:
2897 if (is_ip_any(flow)) {
2898 wc->masks.nw_tos |= IP_DSCP_MASK;
2899 flow->nw_tos &= ~IP_DSCP_MASK;
2900 flow->nw_tos |= ofpact_get_SET_IP_DSCP(a)->dscp;
2904 case OFPACT_SET_IP_ECN:
2905 if (is_ip_any(flow)) {
2906 wc->masks.nw_tos |= IP_ECN_MASK;
2907 flow->nw_tos &= ~IP_ECN_MASK;
2908 flow->nw_tos |= ofpact_get_SET_IP_ECN(a)->ecn;
2912 case OFPACT_SET_IP_TTL:
2913 if (is_ip_any(flow)) {
2914 wc->masks.nw_ttl = 0xff;
2915 flow->nw_ttl = ofpact_get_SET_IP_TTL(a)->ttl;
2919 case OFPACT_SET_L4_SRC_PORT:
2920 if (is_ip_any(flow)) {
2921 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2922 memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src);
2923 flow->tp_src = htons(ofpact_get_SET_L4_SRC_PORT(a)->port);
2927 case OFPACT_SET_L4_DST_PORT:
2928 if (is_ip_any(flow)) {
2929 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2930 memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst);
2931 flow->tp_dst = htons(ofpact_get_SET_L4_DST_PORT(a)->port);
2935 case OFPACT_RESUBMIT:
2936 xlate_ofpact_resubmit(ctx, ofpact_get_RESUBMIT(a));
2939 case OFPACT_SET_TUNNEL:
2940 flow->tunnel.tun_id = htonll(ofpact_get_SET_TUNNEL(a)->tun_id);
2943 case OFPACT_SET_QUEUE:
2944 xlate_set_queue_action(ctx, ofpact_get_SET_QUEUE(a)->queue_id);
2947 case OFPACT_POP_QUEUE:
2948 flow->skb_priority = ctx->orig_skb_priority;
2951 case OFPACT_REG_MOVE:
2952 nxm_execute_reg_move(ofpact_get_REG_MOVE(a), flow, wc);
2955 case OFPACT_REG_LOAD:
2956 nxm_execute_reg_load(ofpact_get_REG_LOAD(a), flow, wc);
2959 case OFPACT_SET_FIELD:
2960 set_field = ofpact_get_SET_FIELD(a);
2961 mf = set_field->field;
2963 /* Set field action only ever overwrites packet's outermost
2964 * applicable header fields. Do nothing if no header exists. */
2965 if (mf->id == MFF_VLAN_VID) {
2966 wc->masks.vlan_tci |= htons(VLAN_CFI);
2967 if (!(flow->vlan_tci & htons(VLAN_CFI))) {
2970 } else if ((mf->id == MFF_MPLS_LABEL || mf->id == MFF_MPLS_TC)
2971 /* 'dl_type' is already unwildcarded. */
2972 && !eth_type_mpls(flow->dl_type)) {
2976 mf_mask_field_and_prereqs(mf, &wc->masks);
2977 mf_set_flow_value(mf, &set_field->value, flow);
2980 case OFPACT_STACK_PUSH:
2981 nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), flow, wc,
2985 case OFPACT_STACK_POP:
2986 nxm_execute_stack_pop(ofpact_get_STACK_POP(a), flow, wc,
2990 case OFPACT_PUSH_MPLS:
2991 compose_mpls_push_action(ctx, ofpact_get_PUSH_MPLS(a));
2994 case OFPACT_POP_MPLS:
2995 compose_mpls_pop_action(ctx, ofpact_get_POP_MPLS(a)->ethertype);
2998 case OFPACT_SET_MPLS_LABEL:
2999 compose_set_mpls_label_action(
3000 ctx, ofpact_get_SET_MPLS_LABEL(a)->label);
3003 case OFPACT_SET_MPLS_TC:
3004 compose_set_mpls_tc_action(ctx, ofpact_get_SET_MPLS_TC(a)->tc);
3007 case OFPACT_SET_MPLS_TTL:
3008 compose_set_mpls_ttl_action(ctx, ofpact_get_SET_MPLS_TTL(a)->ttl);
3011 case OFPACT_DEC_MPLS_TTL:
3012 if (compose_dec_mpls_ttl_action(ctx)) {
3017 case OFPACT_DEC_TTL:
3018 wc->masks.nw_ttl = 0xff;
3019 if (compose_dec_ttl(ctx, ofpact_get_DEC_TTL(a))) {
3025 /* Nothing to do. */
3028 case OFPACT_MULTIPATH:
3029 multipath_execute(ofpact_get_MULTIPATH(a), flow, wc);
3033 xlate_bundle_action(ctx, ofpact_get_BUNDLE(a));
3036 case OFPACT_OUTPUT_REG:
3037 xlate_output_reg_action(ctx, ofpact_get_OUTPUT_REG(a));
3041 xlate_learn_action(ctx, ofpact_get_LEARN(a));
3048 case OFPACT_FIN_TIMEOUT:
3049 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
3050 ctx->xout->has_fin_timeout = true;
3051 xlate_fin_timeout(ctx, ofpact_get_FIN_TIMEOUT(a));
3054 case OFPACT_CLEAR_ACTIONS:
3055 ofpbuf_clear(&ctx->action_set);
3058 case OFPACT_WRITE_ACTIONS:
3059 xlate_write_actions(ctx, a);
3062 case OFPACT_WRITE_METADATA:
3063 metadata = ofpact_get_WRITE_METADATA(a);
3064 flow->metadata &= ~metadata->mask;
3065 flow->metadata |= metadata->metadata & metadata->mask;
3069 /* Not implemented yet. */
3072 case OFPACT_GOTO_TABLE: {
3073 struct ofpact_goto_table *ogt = ofpact_get_GOTO_TABLE(a);
3075 ovs_assert(ctx->table_id < ogt->table_id);
3076 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
3077 ogt->table_id, true, true);
3082 xlate_sample_action(ctx, ofpact_get_SAMPLE(a));
3089 xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto,
3090 const struct flow *flow, struct rule_dpif *rule,
3091 uint16_t tcp_flags, const struct ofpbuf *packet)
3093 xin->ofproto = ofproto;
3095 xin->packet = packet;
3096 xin->may_learn = packet != NULL;
3099 xin->ofpacts = NULL;
3100 xin->ofpacts_len = 0;
3101 xin->tcp_flags = tcp_flags;
3102 xin->resubmit_hook = NULL;
3103 xin->report_hook = NULL;
3104 xin->resubmit_stats = NULL;
3105 xin->skip_wildcards = false;
3109 xlate_out_uninit(struct xlate_out *xout)
3112 ofpbuf_uninit(&xout->odp_actions);
3116 /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts'
3117 * into datapath actions, using 'ctx', and discards the datapath actions. */
3119 xlate_actions_for_side_effects(struct xlate_in *xin)
3121 struct xlate_out xout;
3123 xlate_actions(xin, &xout);
3124 xlate_out_uninit(&xout);
3128 xlate_report(struct xlate_ctx *ctx, const char *s)
3130 if (ctx->xin->report_hook) {
3131 ctx->xin->report_hook(ctx->xin, s, ctx->recurse);
3136 xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src)
3139 dst->slow = src->slow;
3140 dst->has_learn = src->has_learn;
3141 dst->has_normal = src->has_normal;
3142 dst->has_fin_timeout = src->has_fin_timeout;
3143 dst->nf_output_iface = src->nf_output_iface;
3144 dst->mirrors = src->mirrors;
3146 ofpbuf_use_stub(&dst->odp_actions, dst->odp_actions_stub,
3147 sizeof dst->odp_actions_stub);
3148 ofpbuf_put(&dst->odp_actions, ofpbuf_data(&src->odp_actions),
3149 ofpbuf_size(&src->odp_actions));
3152 static struct skb_priority_to_dscp *
3153 get_skb_priority(const struct xport *xport, uint32_t skb_priority)
3155 struct skb_priority_to_dscp *pdscp;
3158 hash = hash_int(skb_priority, 0);
3159 HMAP_FOR_EACH_IN_BUCKET (pdscp, hmap_node, hash, &xport->skb_priorities) {
3160 if (pdscp->skb_priority == skb_priority) {
3168 dscp_from_skb_priority(const struct xport *xport, uint32_t skb_priority,
3171 struct skb_priority_to_dscp *pdscp = get_skb_priority(xport, skb_priority);
3172 *dscp = pdscp ? pdscp->dscp : 0;
3173 return pdscp != NULL;
3177 clear_skb_priorities(struct xport *xport)
3179 struct skb_priority_to_dscp *pdscp, *next;
3181 HMAP_FOR_EACH_SAFE (pdscp, next, hmap_node, &xport->skb_priorities) {
3182 hmap_remove(&xport->skb_priorities, &pdscp->hmap_node);
3188 actions_output_to_local_port(const struct xlate_ctx *ctx)
3190 odp_port_t local_odp_port = ofp_port_to_odp_port(ctx->xbridge, OFPP_LOCAL);
3191 const struct nlattr *a;
3194 NL_ATTR_FOR_EACH_UNSAFE (a, left, ofpbuf_data(&ctx->xout->odp_actions),
3195 ofpbuf_size(&ctx->xout->odp_actions)) {
3196 if (nl_attr_type(a) == OVS_ACTION_ATTR_OUTPUT
3197 && nl_attr_get_odp_port(a) == local_odp_port) {
3204 /* Thread safe call to xlate_actions__(). */
3206 xlate_actions(struct xlate_in *xin, struct xlate_out *xout)
3207 OVS_EXCLUDED(xlate_rwlock)
3209 ovs_rwlock_rdlock(&xlate_rwlock);
3210 xlate_actions__(xin, xout);
3211 ovs_rwlock_unlock(&xlate_rwlock);
3214 /* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts'
3215 * into datapath actions in 'odp_actions', using 'ctx'.
3217 * The caller must take responsibility for eventually freeing 'xout', with
3218 * xlate_out_uninit(). */
3220 xlate_actions__(struct xlate_in *xin, struct xlate_out *xout)
3221 OVS_REQ_RDLOCK(xlate_rwlock)
3223 struct flow_wildcards *wc = &xout->wc;
3224 struct flow *flow = &xin->flow;
3225 struct rule_dpif *rule = NULL;
3227 const struct rule_actions *actions = NULL;
3228 enum slow_path_reason special;
3229 const struct ofpact *ofpacts;
3230 struct xport *in_port;
3231 struct flow orig_flow;
3232 struct xlate_ctx ctx;
3237 COVERAGE_INC(xlate_actions);
3239 /* Flow initialization rules:
3240 * - 'base_flow' must match the kernel's view of the packet at the
3241 * time that action processing starts. 'flow' represents any
3242 * transformations we wish to make through actions.
3243 * - By default 'base_flow' and 'flow' are the same since the input
3244 * packet matches the output before any actions are applied.
3245 * - When using VLAN splinters, 'base_flow''s VLAN is set to the value
3246 * of the received packet as seen by the kernel. If we later output
3247 * to another device without any modifications this will cause us to
3248 * insert a new tag since the original one was stripped off by the
3250 * - Tunnel metadata as received is retained in 'flow'. This allows
3251 * tunnel metadata matching also in later tables.
3252 * Since a kernel action for setting the tunnel metadata will only be
3253 * generated with actual tunnel output, changing the tunnel metadata
3254 * values in 'flow' (such as tun_id) will only have effect with a later
3255 * tunnel output action.
3256 * - Tunnel 'base_flow' is completely cleared since that is what the
3257 * kernel does. If we wish to maintain the original values an action
3258 * needs to be generated. */
3263 ctx.xout->has_learn = false;
3264 ctx.xout->has_normal = false;
3265 ctx.xout->has_fin_timeout = false;
3266 ctx.xout->nf_output_iface = NF_OUT_DROP;
3267 ctx.xout->mirrors = 0;
3268 ofpbuf_use_stub(&ctx.xout->odp_actions, ctx.xout->odp_actions_stub,
3269 sizeof ctx.xout->odp_actions_stub);
3270 ofpbuf_reserve(&ctx.xout->odp_actions, NL_A_U32_SIZE);
3272 ctx.xbridge = xbridge_lookup(xin->ofproto);
3277 ctx.rule = xin->rule;
3279 ctx.base_flow = *flow;
3280 memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel);
3281 ctx.orig_tunnel_ip_dst = flow->tunnel.ip_dst;
3283 flow_wildcards_init_catchall(wc);
3284 memset(&wc->masks.in_port, 0xff, sizeof wc->masks.in_port);
3285 memset(&wc->masks.skb_priority, 0xff, sizeof wc->masks.skb_priority);
3286 memset(&wc->masks.dl_type, 0xff, sizeof wc->masks.dl_type);
3287 if (is_ip_any(flow)) {
3288 wc->masks.nw_frag |= FLOW_NW_FRAG_MASK;
3290 is_icmp = is_icmpv4(flow) || is_icmpv6(flow);
3292 tnl_may_send = tnl_xlate_init(&ctx.base_flow, flow, wc);
3293 if (ctx.xbridge->netflow) {
3294 netflow_mask_wc(flow, wc);
3299 ctx.in_group = false;
3300 ctx.orig_skb_priority = flow->skb_priority;
3303 ctx.use_recirc = false;
3305 if (!xin->ofpacts && !ctx.rule) {
3306 ctx.table_id = rule_dpif_lookup(ctx.xbridge->ofproto, flow,
3307 !xin->skip_wildcards ? wc : NULL,
3308 &rule, ctx.xin->xcache != NULL,
3309 ctx.xin->resubmit_stats);
3310 if (ctx.xin->resubmit_stats) {
3311 rule_dpif_credit_stats(rule, ctx.xin->resubmit_stats);
3313 if (ctx.xin->xcache) {
3314 struct xc_entry *entry;
3316 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_RULE);
3317 entry->u.rule = rule;
3321 xout->fail_open = ctx.rule && rule_dpif_is_fail_open(ctx.rule);
3324 ofpacts = xin->ofpacts;
3325 ofpacts_len = xin->ofpacts_len;
3326 } else if (ctx.rule) {
3327 actions = rule_dpif_get_actions(ctx.rule);
3328 ofpacts = actions->ofpacts;
3329 ofpacts_len = actions->ofpacts_len;
3334 ofpbuf_use_stub(&ctx.stack, ctx.init_stack, sizeof ctx.init_stack);
3335 ofpbuf_use_stub(&ctx.action_set,
3336 ctx.action_set_stub, sizeof ctx.action_set_stub);
3338 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
3339 /* Do this conditionally because the copy is expensive enough that it
3340 * shows up in profiles. */
3344 if (flow->nw_frag & FLOW_NW_FRAG_ANY) {
3345 switch (ctx.xbridge->frag) {
3346 case OFPC_FRAG_NORMAL:
3347 /* We must pretend that transport ports are unavailable. */
3348 flow->tp_src = ctx.base_flow.tp_src = htons(0);
3349 flow->tp_dst = ctx.base_flow.tp_dst = htons(0);
3352 case OFPC_FRAG_DROP:
3355 case OFPC_FRAG_REASM:
3358 case OFPC_FRAG_NX_MATCH:
3359 /* Nothing to do. */
3362 case OFPC_INVALID_TTL_TO_CONTROLLER:
3367 in_port = get_ofp_port(ctx.xbridge, flow->in_port.ofp_port);
3368 if (in_port && in_port->is_tunnel) {
3369 if (ctx.xin->resubmit_stats) {
3370 netdev_vport_inc_rx(in_port->netdev, ctx.xin->resubmit_stats);
3372 bfd_account_rx(in_port->bfd, ctx.xin->resubmit_stats);
3375 if (ctx.xin->xcache) {
3376 struct xc_entry *entry;
3378 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_NETDEV);
3379 entry->u.dev.rx = netdev_ref(in_port->netdev);
3380 entry->u.dev.bfd = bfd_ref(in_port->bfd);
3384 special = process_special(&ctx, flow, in_port, ctx.xin->packet);
3386 ctx.xout->slow |= special;
3388 size_t sample_actions_len;
3390 if (flow->in_port.ofp_port
3391 != vsp_realdev_to_vlandev(ctx.xbridge->ofproto,
3392 flow->in_port.ofp_port,
3394 ctx.base_flow.vlan_tci = 0;
3397 add_sflow_action(&ctx);
3398 add_ipfix_action(&ctx);
3399 sample_actions_len = ofpbuf_size(&ctx.xout->odp_actions);
3401 if (tnl_may_send && (!in_port || may_receive(in_port, &ctx))) {
3402 do_xlate_actions(ofpacts, ofpacts_len, &ctx);
3404 /* We've let OFPP_NORMAL and the learning action look at the
3405 * packet, so drop it now if forwarding is disabled. */
3406 if (in_port && !xport_stp_forward_state(in_port)) {
3407 ofpbuf_set_size(&ctx.xout->odp_actions, sample_actions_len);
3411 if (ofpbuf_size(&ctx.action_set)) {
3412 xlate_action_set(&ctx);
3415 if (ctx.xbridge->has_in_band
3416 && in_band_must_output_to_local_port(flow)
3417 && !actions_output_to_local_port(&ctx)) {
3418 compose_output_action(&ctx, OFPP_LOCAL);
3421 fix_sflow_action(&ctx);
3423 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
3424 add_mirror_actions(&ctx, &orig_flow);
3428 if (nl_attr_oversized(ofpbuf_size(&ctx.xout->odp_actions))) {
3429 /* These datapath actions are too big for a Netlink attribute, so we
3430 * can't hand them to the kernel directly. dpif_execute() can execute
3431 * them one by one with help, so just mark the result as SLOW_ACTION to
3432 * prevent the flow from being installed. */
3433 COVERAGE_INC(xlate_actions_oversize);
3434 ctx.xout->slow |= SLOW_ACTION;
3437 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
3438 if (ctx.xin->resubmit_stats) {
3439 mirror_update_stats(ctx.xbridge->mbridge, xout->mirrors,
3440 ctx.xin->resubmit_stats->n_packets,
3441 ctx.xin->resubmit_stats->n_bytes);
3443 if (ctx.xin->xcache) {
3444 struct xc_entry *entry;
3446 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_MIRROR);
3447 entry->u.mirror.mbridge = mbridge_ref(ctx.xbridge->mbridge);
3448 entry->u.mirror.mirrors = xout->mirrors;
3452 if (ctx.xbridge->netflow) {
3453 /* Only update netflow if we don't have controller flow. We don't
3454 * report NetFlow expiration messages for such facets because they
3455 * are just part of the control logic for the network, not real
3457 if (ofpacts_len == 0
3458 || ofpacts->type != OFPACT_CONTROLLER
3459 || ofpact_next(ofpacts) < ofpact_end(ofpacts, ofpacts_len)) {
3460 if (ctx.xin->resubmit_stats) {
3461 netflow_flow_update(ctx.xbridge->netflow, flow,
3462 xout->nf_output_iface,
3463 ctx.xin->resubmit_stats);
3465 if (ctx.xin->xcache) {
3466 struct xc_entry *entry;
3468 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_NETFLOW);
3469 entry->u.nf.netflow = netflow_ref(ctx.xbridge->netflow);
3470 entry->u.nf.flow = xmemdup(flow, sizeof *flow);
3471 entry->u.nf.iface = xout->nf_output_iface;
3476 ofpbuf_uninit(&ctx.stack);
3477 ofpbuf_uninit(&ctx.action_set);
3479 /* Clear the metadata and register wildcard masks, because we won't
3480 * use non-header fields as part of the cache. */
3481 flow_wildcards_clear_non_packet_fields(wc);
3483 /* ICMPv4 and ICMPv6 have 8-bit "type" and "code" fields. struct flow uses
3484 * the low 8 bits of the 16-bit tp_src and tp_dst members to represent
3485 * these fields. The datapath interface, on the other hand, represents
3486 * them with just 8 bits each. This means that if the high 8 bits of the
3487 * masks for these fields somehow become set, then they will get chopped
3488 * off by a round trip through the datapath, and revalidation will spot
3489 * that as an inconsistency and delete the flow. Avoid the problem here by
3490 * making sure that only the low 8 bits of either field can be unwildcarded
3494 wc->masks.tp_src &= htons(UINT8_MAX);
3495 wc->masks.tp_dst &= htons(UINT8_MAX);
3499 /* Sends 'packet' out 'ofport'.
3500 * May modify 'packet'.
3501 * Returns 0 if successful, otherwise a positive errno value. */
3503 xlate_send_packet(const struct ofport_dpif *ofport, struct ofpbuf *packet)
3505 struct xport *xport;
3506 struct ofpact_output output;
3509 ofpact_init(&output.ofpact, OFPACT_OUTPUT, sizeof output);
3510 /* Use OFPP_NONE as the in_port to avoid special packet processing. */
3511 flow_extract(packet, NULL, &flow);
3512 flow.in_port.ofp_port = OFPP_NONE;
3514 ovs_rwlock_rdlock(&xlate_rwlock);
3515 xport = xport_lookup(ofport);
3517 ovs_rwlock_unlock(&xlate_rwlock);
3520 output.port = xport->ofp_port;
3522 ovs_rwlock_unlock(&xlate_rwlock);
3524 return ofproto_dpif_execute_actions(xport->xbridge->ofproto, &flow, NULL,
3525 &output.ofpact, sizeof output,
3529 struct xlate_cache *
3530 xlate_cache_new(void)
3532 struct xlate_cache *xcache = xmalloc(sizeof *xcache);
3534 ofpbuf_init(&xcache->entries, 512);
3538 static struct xc_entry *
3539 xlate_cache_add_entry(struct xlate_cache *xcache, enum xc_type type)
3541 struct xc_entry *entry;
3543 entry = ofpbuf_put_zeros(&xcache->entries, sizeof *entry);
3550 xlate_cache_netdev(struct xc_entry *entry, const struct dpif_flow_stats *stats)
3552 if (entry->u.dev.tx) {
3553 netdev_vport_inc_tx(entry->u.dev.tx, stats);
3555 if (entry->u.dev.rx) {
3556 netdev_vport_inc_rx(entry->u.dev.rx, stats);
3558 if (entry->u.dev.bfd) {
3559 bfd_account_rx(entry->u.dev.bfd, stats);
3564 xlate_cache_normal(struct ofproto_dpif *ofproto, struct flow *flow, int vlan)
3566 struct xbridge *xbridge;
3567 struct xbundle *xbundle;
3568 struct flow_wildcards wc;
3570 xbridge = xbridge_lookup(ofproto);
3575 xbundle = lookup_input_bundle(xbridge, flow->in_port.ofp_port, false,
3581 update_learning_table(xbridge, flow, &wc, vlan, xbundle);
3584 /* Push stats and perform side effects of flow translation. */
3586 xlate_push_stats(struct xlate_cache *xcache, bool may_learn,
3587 const struct dpif_flow_stats *stats)
3589 struct xc_entry *entry;
3590 struct ofpbuf entries = xcache->entries;
3592 XC_ENTRY_FOR_EACH (entry, entries, xcache) {
3593 switch (entry->type) {
3595 rule_dpif_credit_stats(entry->u.rule, stats);
3598 bond_account(entry->u.bond.bond, entry->u.bond.flow,
3599 entry->u.bond.vid, stats->n_bytes);
3602 xlate_cache_netdev(entry, stats);
3605 netflow_flow_update(entry->u.nf.netflow, entry->u.nf.flow,
3606 entry->u.nf.iface, stats);
3609 mirror_update_stats(entry->u.mirror.mbridge,
3610 entry->u.mirror.mirrors,
3611 stats->n_packets, stats->n_bytes);
3615 struct rule_dpif *rule = entry->u.learn.rule;
3617 /* Reset the modified time for a rule that is equivalent to
3618 * the currently cached rule. If the rule is not the exact
3619 * rule we have cached, update the reference that we have. */
3620 entry->u.learn.rule = ofproto_dpif_refresh_rule(rule);
3624 xlate_cache_normal(entry->u.normal.ofproto, entry->u.normal.flow,
3625 entry->u.normal.vlan);
3627 case XC_FIN_TIMEOUT:
3628 xlate_fin_timeout__(entry->u.fin.rule, stats->tcp_flags,
3629 entry->u.fin.idle, entry->u.fin.hard);
3632 group_dpif_credit_stats(entry->u.group.group, entry->u.group.bucket,
3642 xlate_dev_unref(struct xc_entry *entry)
3644 if (entry->u.dev.tx) {
3645 netdev_close(entry->u.dev.tx);
3647 if (entry->u.dev.rx) {
3648 netdev_close(entry->u.dev.rx);
3650 if (entry->u.dev.bfd) {
3651 bfd_unref(entry->u.dev.bfd);
3656 xlate_cache_clear_netflow(struct netflow *netflow, struct flow *flow)
3658 netflow_expire(netflow, flow);
3659 netflow_flow_clear(netflow, flow);
3660 netflow_unref(netflow);
3665 xlate_cache_clear(struct xlate_cache *xcache)
3667 struct xc_entry *entry;
3668 struct ofpbuf entries;
3674 XC_ENTRY_FOR_EACH (entry, entries, xcache) {
3675 switch (entry->type) {
3677 rule_dpif_unref(entry->u.rule);
3680 free(entry->u.bond.flow);
3681 bond_unref(entry->u.bond.bond);
3684 xlate_dev_unref(entry);
3687 xlate_cache_clear_netflow(entry->u.nf.netflow, entry->u.nf.flow);
3690 mbridge_unref(entry->u.mirror.mbridge);
3693 /* 'u.learn.rule' is the learned rule. */
3694 rule_dpif_unref(entry->u.learn.rule);
3697 free(entry->u.normal.flow);
3699 case XC_FIN_TIMEOUT:
3700 /* 'u.fin.rule' is always already held as a XC_RULE, which
3701 * has already released it's reference above. */
3704 group_dpif_unref(entry->u.group.group);
3711 ofpbuf_clear(&xcache->entries);
3715 xlate_cache_delete(struct xlate_cache *xcache)
3717 xlate_cache_clear(xcache);
3718 ofpbuf_uninit(&xcache->entries);