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 rule_dpif *rule;
273 struct ofproto_dpif *ofproto;
278 struct rule_dpif *rule;
283 struct group_dpif *group;
284 struct ofputil_bucket *bucket;
289 #define XC_ENTRY_FOR_EACH(entry, entries, xcache) \
290 entries = xcache->entries; \
291 for (entry = ofpbuf_try_pull(&entries, sizeof *entry); \
293 entry = ofpbuf_try_pull(&entries, sizeof *entry))
296 struct ofpbuf entries;
299 static struct hmap xbridges = HMAP_INITIALIZER(&xbridges);
300 static struct hmap xbundles = HMAP_INITIALIZER(&xbundles);
301 static struct hmap xports = HMAP_INITIALIZER(&xports);
303 static bool may_receive(const struct xport *, struct xlate_ctx *);
304 static void do_xlate_actions(const struct ofpact *, size_t ofpacts_len,
306 static void xlate_actions__(struct xlate_in *, struct xlate_out *)
307 OVS_REQ_RDLOCK(xlate_rwlock);
308 static void xlate_normal(struct xlate_ctx *);
309 static void xlate_report(struct xlate_ctx *, const char *);
310 static void xlate_table_action(struct xlate_ctx *, ofp_port_t in_port,
311 uint8_t table_id, bool may_packet_in,
312 bool honor_table_miss);
313 static bool input_vid_is_valid(uint16_t vid, struct xbundle *, bool warn);
314 static uint16_t input_vid_to_vlan(const struct xbundle *, uint16_t vid);
315 static void output_normal(struct xlate_ctx *, const struct xbundle *,
317 static void compose_output_action(struct xlate_ctx *, ofp_port_t ofp_port);
319 static struct xbridge *xbridge_lookup(const struct ofproto_dpif *);
320 static struct xbundle *xbundle_lookup(const struct ofbundle *);
321 static struct xport *xport_lookup(const struct ofport_dpif *);
322 static struct xport *get_ofp_port(const struct xbridge *, ofp_port_t ofp_port);
323 static struct skb_priority_to_dscp *get_skb_priority(const struct xport *,
324 uint32_t skb_priority);
325 static void clear_skb_priorities(struct xport *);
326 static bool dscp_from_skb_priority(const struct xport *, uint32_t skb_priority,
329 static struct xc_entry *xlate_cache_add_entry(struct xlate_cache *xc,
333 xlate_ofproto_set(struct ofproto_dpif *ofproto, const char *name,
334 struct dpif *dpif, struct rule_dpif *miss_rule,
335 struct rule_dpif *no_packet_in_rule,
336 const struct mac_learning *ml, struct stp *stp,
337 const struct mbridge *mbridge,
338 const struct dpif_sflow *sflow,
339 const struct dpif_ipfix *ipfix,
340 const struct netflow *netflow, enum ofp_config_flags frag,
341 bool forward_bpdu, bool has_in_band,
343 bool variable_length_userdata,
344 size_t max_mpls_depth)
346 struct xbridge *xbridge = xbridge_lookup(ofproto);
349 xbridge = xzalloc(sizeof *xbridge);
350 xbridge->ofproto = ofproto;
352 hmap_insert(&xbridges, &xbridge->hmap_node, hash_pointer(ofproto, 0));
353 hmap_init(&xbridge->xports);
354 list_init(&xbridge->xbundles);
357 if (xbridge->ml != ml) {
358 mac_learning_unref(xbridge->ml);
359 xbridge->ml = mac_learning_ref(ml);
362 if (xbridge->mbridge != mbridge) {
363 mbridge_unref(xbridge->mbridge);
364 xbridge->mbridge = mbridge_ref(mbridge);
367 if (xbridge->sflow != sflow) {
368 dpif_sflow_unref(xbridge->sflow);
369 xbridge->sflow = dpif_sflow_ref(sflow);
372 if (xbridge->ipfix != ipfix) {
373 dpif_ipfix_unref(xbridge->ipfix);
374 xbridge->ipfix = dpif_ipfix_ref(ipfix);
377 if (xbridge->stp != stp) {
378 stp_unref(xbridge->stp);
379 xbridge->stp = stp_ref(stp);
382 if (xbridge->netflow != netflow) {
383 netflow_unref(xbridge->netflow);
384 xbridge->netflow = netflow_ref(netflow);
388 xbridge->name = xstrdup(name);
390 xbridge->dpif = dpif;
391 xbridge->forward_bpdu = forward_bpdu;
392 xbridge->has_in_band = has_in_band;
393 xbridge->frag = frag;
394 xbridge->miss_rule = miss_rule;
395 xbridge->no_packet_in_rule = no_packet_in_rule;
396 xbridge->enable_recirc = enable_recirc;
397 xbridge->variable_length_userdata = variable_length_userdata;
398 xbridge->max_mpls_depth = max_mpls_depth;
402 xlate_remove_ofproto(struct ofproto_dpif *ofproto)
404 struct xbridge *xbridge = xbridge_lookup(ofproto);
405 struct xbundle *xbundle, *next_xbundle;
406 struct xport *xport, *next_xport;
412 HMAP_FOR_EACH_SAFE (xport, next_xport, ofp_node, &xbridge->xports) {
413 xlate_ofport_remove(xport->ofport);
416 LIST_FOR_EACH_SAFE (xbundle, next_xbundle, list_node, &xbridge->xbundles) {
417 xlate_bundle_remove(xbundle->ofbundle);
420 hmap_remove(&xbridges, &xbridge->hmap_node);
421 mac_learning_unref(xbridge->ml);
422 mbridge_unref(xbridge->mbridge);
423 dpif_sflow_unref(xbridge->sflow);
424 dpif_ipfix_unref(xbridge->ipfix);
425 stp_unref(xbridge->stp);
426 hmap_destroy(&xbridge->xports);
432 xlate_bundle_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
433 const char *name, enum port_vlan_mode vlan_mode, int vlan,
434 unsigned long *trunks, bool use_priority_tags,
435 const struct bond *bond, const struct lacp *lacp,
438 struct xbundle *xbundle = xbundle_lookup(ofbundle);
441 xbundle = xzalloc(sizeof *xbundle);
442 xbundle->ofbundle = ofbundle;
443 xbundle->xbridge = xbridge_lookup(ofproto);
445 hmap_insert(&xbundles, &xbundle->hmap_node, hash_pointer(ofbundle, 0));
446 list_insert(&xbundle->xbridge->xbundles, &xbundle->list_node);
447 list_init(&xbundle->xports);
450 ovs_assert(xbundle->xbridge);
453 xbundle->name = xstrdup(name);
455 xbundle->vlan_mode = vlan_mode;
456 xbundle->vlan = vlan;
457 xbundle->trunks = trunks;
458 xbundle->use_priority_tags = use_priority_tags;
459 xbundle->floodable = floodable;
461 if (xbundle->bond != bond) {
462 bond_unref(xbundle->bond);
463 xbundle->bond = bond_ref(bond);
466 if (xbundle->lacp != lacp) {
467 lacp_unref(xbundle->lacp);
468 xbundle->lacp = lacp_ref(lacp);
473 xlate_bundle_remove(struct ofbundle *ofbundle)
475 struct xbundle *xbundle = xbundle_lookup(ofbundle);
476 struct xport *xport, *next;
482 LIST_FOR_EACH_SAFE (xport, next, bundle_node, &xbundle->xports) {
483 list_remove(&xport->bundle_node);
484 xport->xbundle = NULL;
487 hmap_remove(&xbundles, &xbundle->hmap_node);
488 list_remove(&xbundle->list_node);
489 bond_unref(xbundle->bond);
490 lacp_unref(xbundle->lacp);
496 xlate_ofport_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
497 struct ofport_dpif *ofport, ofp_port_t ofp_port,
498 odp_port_t odp_port, const struct netdev *netdev,
499 const struct cfm *cfm, const struct bfd *bfd,
500 struct ofport_dpif *peer, int stp_port_no,
501 const struct ofproto_port_queue *qdscp_list, size_t n_qdscp,
502 enum ofputil_port_config config,
503 enum ofputil_port_state state, bool is_tunnel,
506 struct xport *xport = xport_lookup(ofport);
510 xport = xzalloc(sizeof *xport);
511 xport->ofport = ofport;
512 xport->xbridge = xbridge_lookup(ofproto);
513 xport->ofp_port = ofp_port;
515 hmap_init(&xport->skb_priorities);
516 hmap_insert(&xports, &xport->hmap_node, hash_pointer(ofport, 0));
517 hmap_insert(&xport->xbridge->xports, &xport->ofp_node,
518 hash_ofp_port(xport->ofp_port));
521 ovs_assert(xport->ofp_port == ofp_port);
523 xport->config = config;
524 xport->state = state;
525 xport->stp_port_no = stp_port_no;
526 xport->is_tunnel = is_tunnel;
527 xport->may_enable = may_enable;
528 xport->odp_port = odp_port;
530 if (xport->netdev != netdev) {
531 netdev_close(xport->netdev);
532 xport->netdev = netdev_ref(netdev);
535 if (xport->cfm != cfm) {
536 cfm_unref(xport->cfm);
537 xport->cfm = cfm_ref(cfm);
540 if (xport->bfd != bfd) {
541 bfd_unref(xport->bfd);
542 xport->bfd = bfd_ref(bfd);
546 xport->peer->peer = NULL;
548 xport->peer = xport_lookup(peer);
550 xport->peer->peer = xport;
553 if (xport->xbundle) {
554 list_remove(&xport->bundle_node);
556 xport->xbundle = xbundle_lookup(ofbundle);
557 if (xport->xbundle) {
558 list_insert(&xport->xbundle->xports, &xport->bundle_node);
561 clear_skb_priorities(xport);
562 for (i = 0; i < n_qdscp; i++) {
563 struct skb_priority_to_dscp *pdscp;
564 uint32_t skb_priority;
566 if (dpif_queue_to_priority(xport->xbridge->dpif, qdscp_list[i].queue,
571 pdscp = xmalloc(sizeof *pdscp);
572 pdscp->skb_priority = skb_priority;
573 pdscp->dscp = (qdscp_list[i].dscp << 2) & IP_DSCP_MASK;
574 hmap_insert(&xport->skb_priorities, &pdscp->hmap_node,
575 hash_int(pdscp->skb_priority, 0));
580 xlate_ofport_remove(struct ofport_dpif *ofport)
582 struct xport *xport = xport_lookup(ofport);
589 xport->peer->peer = NULL;
593 if (xport->xbundle) {
594 list_remove(&xport->bundle_node);
597 clear_skb_priorities(xport);
598 hmap_destroy(&xport->skb_priorities);
600 hmap_remove(&xports, &xport->hmap_node);
601 hmap_remove(&xport->xbridge->xports, &xport->ofp_node);
603 netdev_close(xport->netdev);
604 cfm_unref(xport->cfm);
605 bfd_unref(xport->bfd);
609 /* Given a datpath, packet, and flow metadata ('backer', 'packet', and 'key'
610 * respectively), populates 'flow' with the result of odp_flow_key_to_flow().
611 * Optionally populates 'ofproto' with the ofproto_dpif, 'odp_in_port' with
612 * the datapath in_port, that 'packet' ingressed, and 'ipfix', 'sflow', and
613 * 'netflow' with the appropriate handles for those protocols if they're
614 * enabled. Caller is responsible for unrefing them.
616 * If 'ofproto' is nonnull, requires 'flow''s in_port to exist. Otherwise sets
617 * 'flow''s in_port to OFPP_NONE.
619 * This function does post-processing on data returned from
620 * odp_flow_key_to_flow() to help make VLAN splinters transparent to the rest
621 * of the upcall processing logic. In particular, if the extracted in_port is
622 * a VLAN splinter port, it replaces flow->in_port by the "real" port, sets
623 * flow->vlan_tci correctly for the VLAN of the VLAN splinter port, and pushes
624 * a VLAN header onto 'packet' (if it is nonnull).
626 * Similarly, this function also includes some logic to help with tunnels. It
627 * may modify 'flow' as necessary to make the tunneling implementation
628 * transparent to the upcall processing logic.
630 * Returns 0 if successful, ENODEV if the parsed flow has no associated ofport,
631 * or some other positive errno if there are other problems. */
633 xlate_receive(const struct dpif_backer *backer, struct ofpbuf *packet,
634 const struct nlattr *key, size_t key_len, struct flow *flow,
635 struct ofproto_dpif **ofproto, struct dpif_ipfix **ipfix,
636 struct dpif_sflow **sflow, struct netflow **netflow,
637 odp_port_t *odp_in_port)
639 const struct xport *xport;
642 ovs_rwlock_rdlock(&xlate_rwlock);
643 if (odp_flow_key_to_flow(key, key_len, flow) == ODP_FIT_ERROR) {
649 *odp_in_port = flow->in_port.odp_port;
652 xport = xport_lookup(tnl_port_should_receive(flow)
653 ? tnl_port_receive(flow)
654 : odp_port_to_ofport(backer, flow->in_port.odp_port));
656 flow->in_port.ofp_port = xport ? xport->ofp_port : OFPP_NONE;
661 if (vsp_adjust_flow(xport->xbridge->ofproto, flow)) {
663 /* Make the packet resemble the flow, so that it gets sent to
664 * an OpenFlow controller properly, so that it looks correct
665 * for sFlow, and so that flow_extract() will get the correct
666 * vlan_tci if it is called on 'packet'. */
667 eth_push_vlan(packet, htons(ETH_TYPE_VLAN), flow->vlan_tci);
673 *ofproto = xport->xbridge->ofproto;
677 *ipfix = dpif_ipfix_ref(xport->xbridge->ipfix);
681 *sflow = dpif_sflow_ref(xport->xbridge->sflow);
685 *netflow = netflow_ref(xport->xbridge->netflow);
689 ovs_rwlock_unlock(&xlate_rwlock);
693 static struct xbridge *
694 xbridge_lookup(const struct ofproto_dpif *ofproto)
696 struct xbridge *xbridge;
702 HMAP_FOR_EACH_IN_BUCKET (xbridge, hmap_node, hash_pointer(ofproto, 0),
704 if (xbridge->ofproto == ofproto) {
711 static struct xbundle *
712 xbundle_lookup(const struct ofbundle *ofbundle)
714 struct xbundle *xbundle;
720 HMAP_FOR_EACH_IN_BUCKET (xbundle, hmap_node, hash_pointer(ofbundle, 0),
722 if (xbundle->ofbundle == ofbundle) {
729 static struct xport *
730 xport_lookup(const struct ofport_dpif *ofport)
738 HMAP_FOR_EACH_IN_BUCKET (xport, hmap_node, hash_pointer(ofport, 0),
740 if (xport->ofport == ofport) {
747 static struct stp_port *
748 xport_get_stp_port(const struct xport *xport)
750 return xport->xbridge->stp && xport->stp_port_no != -1
751 ? stp_get_port(xport->xbridge->stp, xport->stp_port_no)
756 xport_stp_learn_state(const struct xport *xport)
758 struct stp_port *sp = xport_get_stp_port(xport);
759 return stp_learn_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
763 xport_stp_forward_state(const struct xport *xport)
765 struct stp_port *sp = xport_get_stp_port(xport);
766 return stp_forward_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
770 xport_stp_listen_state(const struct xport *xport)
772 struct stp_port *sp = xport_get_stp_port(xport);
773 return stp_listen_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
776 /* Returns true if STP should process 'flow'. Sets fields in 'wc' that
777 * were used to make the determination.*/
779 stp_should_process_flow(const struct flow *flow, struct flow_wildcards *wc)
781 /* is_stp() also checks dl_type, but dl_type is always set in 'wc'. */
782 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
787 stp_process_packet(const struct xport *xport, const struct ofpbuf *packet)
789 struct stp_port *sp = xport_get_stp_port(xport);
790 struct ofpbuf payload = *packet;
791 struct eth_header *eth = ofpbuf_data(&payload);
793 /* Sink packets on ports that have STP disabled when the bridge has
795 if (!sp || stp_port_get_state(sp) == STP_DISABLED) {
799 /* Trim off padding on payload. */
800 if (ofpbuf_size(&payload) > ntohs(eth->eth_type) + ETH_HEADER_LEN) {
801 ofpbuf_set_size(&payload, ntohs(eth->eth_type) + ETH_HEADER_LEN);
804 if (ofpbuf_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) {
805 stp_received_bpdu(sp, ofpbuf_data(&payload), ofpbuf_size(&payload));
809 static struct xport *
810 get_ofp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
814 HMAP_FOR_EACH_IN_BUCKET (xport, ofp_node, hash_ofp_port(ofp_port),
816 if (xport->ofp_port == ofp_port) {
824 ofp_port_to_odp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
826 const struct xport *xport = get_ofp_port(xbridge, ofp_port);
827 return xport ? xport->odp_port : ODPP_NONE;
831 odp_port_is_alive(const struct xlate_ctx *ctx, ofp_port_t ofp_port)
835 xport = get_ofp_port(ctx->xbridge, ofp_port);
836 if (!xport || xport->config & OFPUTIL_PC_PORT_DOWN ||
837 xport->state & OFPUTIL_PS_LINK_DOWN) {
844 static struct ofputil_bucket *
845 group_first_live_bucket(const struct xlate_ctx *, const struct group_dpif *,
849 group_is_alive(const struct xlate_ctx *ctx, uint32_t group_id, int depth)
851 struct group_dpif *group;
853 if (group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group)) {
854 struct ofputil_bucket *bucket;
856 bucket = group_first_live_bucket(ctx, group, depth);
857 group_dpif_unref(group);
858 return bucket == NULL;
864 #define MAX_LIVENESS_RECURSION 128 /* Arbitrary limit */
867 bucket_is_alive(const struct xlate_ctx *ctx,
868 struct ofputil_bucket *bucket, int depth)
870 if (depth >= MAX_LIVENESS_RECURSION) {
871 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
873 VLOG_WARN_RL(&rl, "bucket chaining exceeded %d links",
874 MAX_LIVENESS_RECURSION);
878 return (!ofputil_bucket_has_liveness(bucket)
879 || (bucket->watch_port != OFPP_ANY
880 && odp_port_is_alive(ctx, bucket->watch_port))
881 || (bucket->watch_group != OFPG_ANY
882 && group_is_alive(ctx, bucket->watch_group, depth + 1)));
885 static struct ofputil_bucket *
886 group_first_live_bucket(const struct xlate_ctx *ctx,
887 const struct group_dpif *group, int depth)
889 struct ofputil_bucket *bucket;
890 const struct list *buckets;
892 group_dpif_get_buckets(group, &buckets);
893 LIST_FOR_EACH (bucket, list_node, buckets) {
894 if (bucket_is_alive(ctx, bucket, depth)) {
902 static struct ofputil_bucket *
903 group_best_live_bucket(const struct xlate_ctx *ctx,
904 const struct group_dpif *group,
907 struct ofputil_bucket *best_bucket = NULL;
908 uint32_t best_score = 0;
911 struct ofputil_bucket *bucket;
912 const struct list *buckets;
914 group_dpif_get_buckets(group, &buckets);
915 LIST_FOR_EACH (bucket, list_node, buckets) {
916 if (bucket_is_alive(ctx, bucket, 0)) {
917 uint32_t score = (hash_int(i, basis) & 0xffff) * bucket->weight;
918 if (score >= best_score) {
919 best_bucket = bucket;
930 xbundle_trunks_vlan(const struct xbundle *bundle, uint16_t vlan)
932 return (bundle->vlan_mode != PORT_VLAN_ACCESS
933 && (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan)));
937 xbundle_includes_vlan(const struct xbundle *xbundle, uint16_t vlan)
939 return vlan == xbundle->vlan || xbundle_trunks_vlan(xbundle, vlan);
943 xbundle_mirror_out(const struct xbridge *xbridge, struct xbundle *xbundle)
945 return xbundle != &ofpp_none_bundle
946 ? mirror_bundle_out(xbridge->mbridge, xbundle->ofbundle)
951 xbundle_mirror_src(const struct xbridge *xbridge, struct xbundle *xbundle)
953 return xbundle != &ofpp_none_bundle
954 ? mirror_bundle_src(xbridge->mbridge, xbundle->ofbundle)
959 xbundle_mirror_dst(const struct xbridge *xbridge, struct xbundle *xbundle)
961 return xbundle != &ofpp_none_bundle
962 ? mirror_bundle_dst(xbridge->mbridge, xbundle->ofbundle)
966 static struct xbundle *
967 lookup_input_bundle(const struct xbridge *xbridge, ofp_port_t in_port,
968 bool warn, struct xport **in_xportp)
972 /* Find the port and bundle for the received packet. */
973 xport = get_ofp_port(xbridge, in_port);
977 if (xport && xport->xbundle) {
978 return xport->xbundle;
981 /* Special-case OFPP_NONE (OF1.0) and OFPP_CONTROLLER (OF1.1+),
982 * which a controller may use as the ingress port for traffic that
984 if (in_port == OFPP_CONTROLLER || in_port == OFPP_NONE) {
985 return &ofpp_none_bundle;
988 /* Odd. A few possible reasons here:
990 * - We deleted a port but there are still a few packets queued up
993 * - Someone externally added a port (e.g. "ovs-dpctl add-if") that
994 * we don't know about.
996 * - The ofproto client didn't configure the port as part of a bundle.
997 * This is particularly likely to happen if a packet was received on the
998 * port after it was created, but before the client had a chance to
999 * configure its bundle.
1002 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1004 VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown "
1005 "port %"PRIu16, xbridge->name, in_port);
1011 add_mirror_actions(struct xlate_ctx *ctx, const struct flow *orig_flow)
1013 const struct xbridge *xbridge = ctx->xbridge;
1014 mirror_mask_t mirrors;
1015 struct xbundle *in_xbundle;
1019 mirrors = ctx->xout->mirrors;
1020 ctx->xout->mirrors = 0;
1022 in_xbundle = lookup_input_bundle(xbridge, orig_flow->in_port.ofp_port,
1023 ctx->xin->packet != NULL, NULL);
1027 mirrors |= xbundle_mirror_src(xbridge, in_xbundle);
1029 /* Drop frames on bundles reserved for mirroring. */
1030 if (xbundle_mirror_out(xbridge, in_xbundle)) {
1031 if (ctx->xin->packet != NULL) {
1032 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1033 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
1034 "%s, which is reserved exclusively for mirroring",
1035 ctx->xbridge->name, in_xbundle->name);
1037 ofpbuf_clear(&ctx->xout->odp_actions);
1042 vid = vlan_tci_to_vid(orig_flow->vlan_tci);
1043 if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) {
1046 vlan = input_vid_to_vlan(in_xbundle, vid);
1052 /* Restore the original packet before adding the mirror actions. */
1053 ctx->xin->flow = *orig_flow;
1056 mirror_mask_t dup_mirrors;
1057 struct ofbundle *out;
1058 unsigned long *vlans;
1063 has_mirror = mirror_get(xbridge->mbridge, raw_ctz(mirrors),
1064 &vlans, &dup_mirrors, &out, &out_vlan);
1065 ovs_assert(has_mirror);
1068 ctx->xout->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK);
1070 vlan_mirrored = !vlans || bitmap_is_set(vlans, vlan);
1073 if (!vlan_mirrored) {
1074 mirrors = zero_rightmost_1bit(mirrors);
1078 mirrors &= ~dup_mirrors;
1079 ctx->xout->mirrors |= dup_mirrors;
1081 struct xbundle *out_xbundle = xbundle_lookup(out);
1083 output_normal(ctx, out_xbundle, vlan);
1085 } else if (vlan != out_vlan
1086 && !eth_addr_is_reserved(orig_flow->dl_dst)) {
1087 struct xbundle *xbundle;
1089 LIST_FOR_EACH (xbundle, list_node, &xbridge->xbundles) {
1090 if (xbundle_includes_vlan(xbundle, out_vlan)
1091 && !xbundle_mirror_out(xbridge, xbundle)) {
1092 output_normal(ctx, xbundle, out_vlan);
1099 /* Given 'vid', the VID obtained from the 802.1Q header that was received as
1100 * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle',
1101 * the bundle on which the packet was received, returns the VLAN to which the
1104 * Both 'vid' and the return value are in the range 0...4095. */
1106 input_vid_to_vlan(const struct xbundle *in_xbundle, uint16_t vid)
1108 switch (in_xbundle->vlan_mode) {
1109 case PORT_VLAN_ACCESS:
1110 return in_xbundle->vlan;
1113 case PORT_VLAN_TRUNK:
1116 case PORT_VLAN_NATIVE_UNTAGGED:
1117 case PORT_VLAN_NATIVE_TAGGED:
1118 return vid ? vid : in_xbundle->vlan;
1125 /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'.
1126 * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs
1129 * 'vid' should be the VID obtained from the 802.1Q header that was received as
1130 * part of a packet (specify 0 if there was no 802.1Q header), in the range
1133 input_vid_is_valid(uint16_t vid, struct xbundle *in_xbundle, bool warn)
1135 /* Allow any VID on the OFPP_NONE port. */
1136 if (in_xbundle == &ofpp_none_bundle) {
1140 switch (in_xbundle->vlan_mode) {
1141 case PORT_VLAN_ACCESS:
1144 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1145 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" tagged "
1146 "packet received on port %s configured as VLAN "
1147 "%"PRIu16" access port", vid, in_xbundle->name,
1154 case PORT_VLAN_NATIVE_UNTAGGED:
1155 case PORT_VLAN_NATIVE_TAGGED:
1157 /* Port must always carry its native VLAN. */
1161 case PORT_VLAN_TRUNK:
1162 if (!xbundle_includes_vlan(in_xbundle, vid)) {
1164 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1165 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" packet "
1166 "received on port %s not configured for trunking "
1167 "VLAN %"PRIu16, vid, in_xbundle->name, vid);
1179 /* Given 'vlan', the VLAN that a packet belongs to, and
1180 * 'out_xbundle', a bundle on which the packet is to be output, returns the VID
1181 * that should be included in the 802.1Q header. (If the return value is 0,
1182 * then the 802.1Q header should only be included in the packet if there is a
1185 * Both 'vlan' and the return value are in the range 0...4095. */
1187 output_vlan_to_vid(const struct xbundle *out_xbundle, uint16_t vlan)
1189 switch (out_xbundle->vlan_mode) {
1190 case PORT_VLAN_ACCESS:
1193 case PORT_VLAN_TRUNK:
1194 case PORT_VLAN_NATIVE_TAGGED:
1197 case PORT_VLAN_NATIVE_UNTAGGED:
1198 return vlan == out_xbundle->vlan ? 0 : vlan;
1206 output_normal(struct xlate_ctx *ctx, const struct xbundle *out_xbundle,
1209 ovs_be16 *flow_tci = &ctx->xin->flow.vlan_tci;
1211 ovs_be16 tci, old_tci;
1212 struct xport *xport;
1214 vid = output_vlan_to_vid(out_xbundle, vlan);
1215 if (list_is_empty(&out_xbundle->xports)) {
1216 /* Partially configured bundle with no slaves. Drop the packet. */
1218 } else if (!out_xbundle->bond) {
1219 ctx->use_recirc = false;
1220 xport = CONTAINER_OF(list_front(&out_xbundle->xports), struct xport,
1223 struct ofport_dpif *ofport;
1224 struct xlate_recirc *xr = &ctx->recirc;
1225 struct flow_wildcards *wc = &ctx->xout->wc;
1227 if (ctx->xbridge->enable_recirc) {
1228 ctx->use_recirc = bond_may_recirc(
1229 out_xbundle->bond, &xr->recirc_id, &xr->hash_basis);
1231 if (ctx->use_recirc) {
1232 /* Only TCP mode uses recirculation. */
1233 xr->hash_alg = OVS_HASH_ALG_L4;
1234 bond_update_post_recirc_rules(out_xbundle->bond, false);
1236 /* Recirculation does not require unmasking hash fields. */
1241 ofport = bond_choose_output_slave(out_xbundle->bond,
1242 &ctx->xin->flow, wc, vid);
1243 xport = xport_lookup(ofport);
1246 /* No slaves enabled, so drop packet. */
1250 /* If ctx->xout->use_recirc is set, the main thread will handle stats
1251 * accounting for this bond. */
1252 if (!ctx->use_recirc) {
1253 if (ctx->xin->resubmit_stats) {
1254 bond_account(out_xbundle->bond, &ctx->xin->flow, vid,
1255 ctx->xin->resubmit_stats->n_bytes);
1257 if (ctx->xin->xcache) {
1258 struct xc_entry *entry;
1261 flow = &ctx->xin->flow;
1262 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_BOND);
1263 entry->u.bond.bond = bond_ref(out_xbundle->bond);
1264 entry->u.bond.flow = xmemdup(flow, sizeof *flow);
1265 entry->u.bond.vid = vid;
1270 old_tci = *flow_tci;
1272 if (tci || out_xbundle->use_priority_tags) {
1273 tci |= *flow_tci & htons(VLAN_PCP_MASK);
1275 tci |= htons(VLAN_CFI);
1280 compose_output_action(ctx, xport->ofp_port);
1281 *flow_tci = old_tci;
1284 /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after
1285 * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to
1286 * indicate this; newer upstream kernels use gratuitous ARP requests. */
1288 is_gratuitous_arp(const struct flow *flow, struct flow_wildcards *wc)
1290 if (flow->dl_type != htons(ETH_TYPE_ARP)) {
1294 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1295 if (!eth_addr_is_broadcast(flow->dl_dst)) {
1299 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
1300 if (flow->nw_proto == ARP_OP_REPLY) {
1302 } else if (flow->nw_proto == ARP_OP_REQUEST) {
1303 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
1304 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
1306 return flow->nw_src == flow->nw_dst;
1312 /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or
1313 * dropped. Returns true if they may be forwarded, false if they should be
1316 * 'in_port' must be the xport that corresponds to flow->in_port.
1317 * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull).
1319 * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as
1320 * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as
1321 * checked by input_vid_is_valid().
1323 * May also add tags to '*tags', although the current implementation only does
1324 * so in one special case.
1327 is_admissible(struct xlate_ctx *ctx, struct xport *in_port,
1330 struct xbundle *in_xbundle = in_port->xbundle;
1331 const struct xbridge *xbridge = ctx->xbridge;
1332 struct flow *flow = &ctx->xin->flow;
1334 /* Drop frames for reserved multicast addresses
1335 * only if forward_bpdu option is absent. */
1336 if (!xbridge->forward_bpdu && eth_addr_is_reserved(flow->dl_dst)) {
1337 xlate_report(ctx, "packet has reserved destination MAC, dropping");
1341 if (in_xbundle->bond) {
1342 struct mac_entry *mac;
1344 switch (bond_check_admissibility(in_xbundle->bond, in_port->ofport,
1350 xlate_report(ctx, "bonding refused admissibility, dropping");
1353 case BV_DROP_IF_MOVED:
1354 ovs_rwlock_rdlock(&xbridge->ml->rwlock);
1355 mac = mac_learning_lookup(xbridge->ml, flow->dl_src, vlan);
1356 if (mac && mac->port.p != in_xbundle->ofbundle &&
1357 (!is_gratuitous_arp(flow, &ctx->xout->wc)
1358 || mac_entry_is_grat_arp_locked(mac))) {
1359 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1360 xlate_report(ctx, "SLB bond thinks this packet looped back, "
1364 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1372 /* Checks whether a MAC learning update is necessary for MAC learning table
1373 * 'ml' given that a packet matching 'flow' was received on 'in_xbundle' in
1376 * Most packets processed through the MAC learning table do not actually
1377 * change it in any way. This function requires only a read lock on the MAC
1378 * learning table, so it is much cheaper in this common case.
1380 * Keep the code here synchronized with that in update_learning_table__()
1383 is_mac_learning_update_needed(const struct mac_learning *ml,
1384 const struct flow *flow,
1385 struct flow_wildcards *wc,
1386 int vlan, struct xbundle *in_xbundle)
1387 OVS_REQ_RDLOCK(ml->rwlock)
1389 struct mac_entry *mac;
1391 if (!mac_learning_may_learn(ml, flow->dl_src, vlan)) {
1395 mac = mac_learning_lookup(ml, flow->dl_src, vlan);
1396 if (!mac || mac_entry_age(ml, mac)) {
1400 if (is_gratuitous_arp(flow, wc)) {
1401 /* We don't want to learn from gratuitous ARP packets that are
1402 * reflected back over bond slaves so we lock the learning table. */
1403 if (!in_xbundle->bond) {
1405 } else if (mac_entry_is_grat_arp_locked(mac)) {
1410 return mac->port.p != in_xbundle->ofbundle;
1414 /* Updates MAC learning table 'ml' given that a packet matching 'flow' was
1415 * received on 'in_xbundle' in 'vlan'.
1417 * This code repeats all the checks in is_mac_learning_update_needed() because
1418 * the lock was released between there and here and thus the MAC learning state
1419 * could have changed.
1421 * Keep the code here synchronized with that in is_mac_learning_update_needed()
1424 update_learning_table__(const struct xbridge *xbridge,
1425 const struct flow *flow, struct flow_wildcards *wc,
1426 int vlan, struct xbundle *in_xbundle)
1427 OVS_REQ_WRLOCK(xbridge->ml->rwlock)
1429 struct mac_entry *mac;
1431 if (!mac_learning_may_learn(xbridge->ml, flow->dl_src, vlan)) {
1435 mac = mac_learning_insert(xbridge->ml, flow->dl_src, vlan);
1436 if (is_gratuitous_arp(flow, wc)) {
1437 /* We don't want to learn from gratuitous ARP packets that are
1438 * reflected back over bond slaves so we lock the learning table. */
1439 if (!in_xbundle->bond) {
1440 mac_entry_set_grat_arp_lock(mac);
1441 } else if (mac_entry_is_grat_arp_locked(mac)) {
1446 if (mac->port.p != in_xbundle->ofbundle) {
1447 /* The log messages here could actually be useful in debugging,
1448 * so keep the rate limit relatively high. */
1449 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
1451 VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
1452 "on port %s in VLAN %d",
1453 xbridge->name, ETH_ADDR_ARGS(flow->dl_src),
1454 in_xbundle->name, vlan);
1456 mac->port.p = in_xbundle->ofbundle;
1457 mac_learning_changed(xbridge->ml);
1462 update_learning_table(const struct xbridge *xbridge,
1463 const struct flow *flow, struct flow_wildcards *wc,
1464 int vlan, struct xbundle *in_xbundle)
1468 /* Don't learn the OFPP_NONE port. */
1469 if (in_xbundle == &ofpp_none_bundle) {
1473 /* First try the common case: no change to MAC learning table. */
1474 ovs_rwlock_rdlock(&xbridge->ml->rwlock);
1475 need_update = is_mac_learning_update_needed(xbridge->ml, flow, wc, vlan,
1477 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1480 /* Slow path: MAC learning table might need an update. */
1481 ovs_rwlock_wrlock(&xbridge->ml->rwlock);
1482 update_learning_table__(xbridge, flow, wc, vlan, in_xbundle);
1483 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1488 xlate_normal_flood(struct xlate_ctx *ctx, struct xbundle *in_xbundle,
1491 struct xbundle *xbundle;
1493 LIST_FOR_EACH (xbundle, list_node, &ctx->xbridge->xbundles) {
1494 if (xbundle != in_xbundle
1495 && xbundle_includes_vlan(xbundle, vlan)
1496 && xbundle->floodable
1497 && !xbundle_mirror_out(ctx->xbridge, xbundle)) {
1498 output_normal(ctx, xbundle, vlan);
1501 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
1505 xlate_normal(struct xlate_ctx *ctx)
1507 struct flow_wildcards *wc = &ctx->xout->wc;
1508 struct flow *flow = &ctx->xin->flow;
1509 struct xbundle *in_xbundle;
1510 struct xport *in_port;
1511 struct mac_entry *mac;
1516 ctx->xout->has_normal = true;
1518 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
1519 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1520 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
1522 in_xbundle = lookup_input_bundle(ctx->xbridge, flow->in_port.ofp_port,
1523 ctx->xin->packet != NULL, &in_port);
1525 xlate_report(ctx, "no input bundle, dropping");
1529 /* Drop malformed frames. */
1530 if (flow->dl_type == htons(ETH_TYPE_VLAN) &&
1531 !(flow->vlan_tci & htons(VLAN_CFI))) {
1532 if (ctx->xin->packet != NULL) {
1533 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1534 VLOG_WARN_RL(&rl, "bridge %s: dropping packet with partial "
1535 "VLAN tag received on port %s",
1536 ctx->xbridge->name, in_xbundle->name);
1538 xlate_report(ctx, "partial VLAN tag, dropping");
1542 /* Drop frames on bundles reserved for mirroring. */
1543 if (xbundle_mirror_out(ctx->xbridge, in_xbundle)) {
1544 if (ctx->xin->packet != NULL) {
1545 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1546 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
1547 "%s, which is reserved exclusively for mirroring",
1548 ctx->xbridge->name, in_xbundle->name);
1550 xlate_report(ctx, "input port is mirror output port, dropping");
1555 vid = vlan_tci_to_vid(flow->vlan_tci);
1556 if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) {
1557 xlate_report(ctx, "disallowed VLAN VID for this input port, dropping");
1560 vlan = input_vid_to_vlan(in_xbundle, vid);
1562 /* Check other admissibility requirements. */
1563 if (in_port && !is_admissible(ctx, in_port, vlan)) {
1567 /* Learn source MAC. */
1568 if (ctx->xin->may_learn) {
1569 update_learning_table(ctx->xbridge, flow, wc, vlan, in_xbundle);
1571 if (ctx->xin->xcache) {
1572 struct xc_entry *entry;
1574 /* Save enough info to update mac learning table later. */
1575 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NORMAL);
1576 entry->u.normal.ofproto = ctx->xbridge->ofproto;
1577 entry->u.normal.flow = xmemdup(flow, sizeof *flow);
1578 entry->u.normal.vlan = vlan;
1581 /* Determine output bundle. */
1582 ovs_rwlock_rdlock(&ctx->xbridge->ml->rwlock);
1583 mac = mac_learning_lookup(ctx->xbridge->ml, flow->dl_dst, vlan);
1584 mac_port = mac ? mac->port.p : NULL;
1585 ovs_rwlock_unlock(&ctx->xbridge->ml->rwlock);
1588 struct xbundle *mac_xbundle = xbundle_lookup(mac_port);
1589 if (mac_xbundle && mac_xbundle != in_xbundle) {
1590 xlate_report(ctx, "forwarding to learned port");
1591 output_normal(ctx, mac_xbundle, vlan);
1592 } else if (!mac_xbundle) {
1593 xlate_report(ctx, "learned port is unknown, dropping");
1595 xlate_report(ctx, "learned port is input port, dropping");
1598 xlate_report(ctx, "no learned MAC for destination, flooding");
1599 xlate_normal_flood(ctx, in_xbundle, vlan);
1603 /* Compose SAMPLE action for sFlow or IPFIX. The given probability is
1604 * the number of packets out of UINT32_MAX to sample. The given
1605 * cookie is passed back in the callback for each sampled packet.
1608 compose_sample_action(const struct xbridge *xbridge,
1609 struct ofpbuf *odp_actions,
1610 const struct flow *flow,
1611 const uint32_t probability,
1612 const union user_action_cookie *cookie,
1613 const size_t cookie_size)
1615 size_t sample_offset, actions_offset;
1616 odp_port_t odp_port;
1620 sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE);
1622 nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability);
1624 actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS);
1626 odp_port = ofp_port_to_odp_port(xbridge, flow->in_port.ofp_port);
1627 pid = dpif_port_get_pid(xbridge->dpif, odp_port,
1628 flow_hash_5tuple(flow, 0));
1629 cookie_offset = odp_put_userspace_action(pid, cookie, cookie_size,
1632 nl_msg_end_nested(odp_actions, actions_offset);
1633 nl_msg_end_nested(odp_actions, sample_offset);
1634 return cookie_offset;
1638 compose_sflow_cookie(const struct xbridge *xbridge, ovs_be16 vlan_tci,
1639 odp_port_t odp_port, unsigned int n_outputs,
1640 union user_action_cookie *cookie)
1644 cookie->type = USER_ACTION_COOKIE_SFLOW;
1645 cookie->sflow.vlan_tci = vlan_tci;
1647 /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output
1648 * port information") for the interpretation of cookie->output. */
1649 switch (n_outputs) {
1651 /* 0x40000000 | 256 means "packet dropped for unknown reason". */
1652 cookie->sflow.output = 0x40000000 | 256;
1656 ifindex = dpif_sflow_odp_port_to_ifindex(xbridge->sflow, odp_port);
1658 cookie->sflow.output = ifindex;
1663 /* 0x80000000 means "multiple output ports. */
1664 cookie->sflow.output = 0x80000000 | n_outputs;
1669 /* Compose SAMPLE action for sFlow bridge sampling. */
1671 compose_sflow_action(const struct xbridge *xbridge,
1672 struct ofpbuf *odp_actions,
1673 const struct flow *flow,
1674 odp_port_t odp_port)
1676 uint32_t probability;
1677 union user_action_cookie cookie;
1679 if (!xbridge->sflow || flow->in_port.ofp_port == OFPP_NONE) {
1683 probability = dpif_sflow_get_probability(xbridge->sflow);
1684 compose_sflow_cookie(xbridge, htons(0), odp_port,
1685 odp_port == ODPP_NONE ? 0 : 1, &cookie);
1687 return compose_sample_action(xbridge, odp_actions, flow, probability,
1688 &cookie, sizeof cookie.sflow);
1692 compose_flow_sample_cookie(uint16_t probability, uint32_t collector_set_id,
1693 uint32_t obs_domain_id, uint32_t obs_point_id,
1694 union user_action_cookie *cookie)
1696 cookie->type = USER_ACTION_COOKIE_FLOW_SAMPLE;
1697 cookie->flow_sample.probability = probability;
1698 cookie->flow_sample.collector_set_id = collector_set_id;
1699 cookie->flow_sample.obs_domain_id = obs_domain_id;
1700 cookie->flow_sample.obs_point_id = obs_point_id;
1704 compose_ipfix_cookie(union user_action_cookie *cookie)
1706 cookie->type = USER_ACTION_COOKIE_IPFIX;
1709 /* Compose SAMPLE action for IPFIX bridge sampling. */
1711 compose_ipfix_action(const struct xbridge *xbridge,
1712 struct ofpbuf *odp_actions,
1713 const struct flow *flow)
1715 uint32_t probability;
1716 union user_action_cookie cookie;
1718 if (!xbridge->ipfix || flow->in_port.ofp_port == OFPP_NONE) {
1722 probability = dpif_ipfix_get_bridge_exporter_probability(xbridge->ipfix);
1723 compose_ipfix_cookie(&cookie);
1725 compose_sample_action(xbridge, odp_actions, flow, probability,
1726 &cookie, sizeof cookie.ipfix);
1729 /* SAMPLE action for sFlow must be first action in any given list of
1730 * actions. At this point we do not have all information required to
1731 * build it. So try to build sample action as complete as possible. */
1733 add_sflow_action(struct xlate_ctx *ctx)
1735 ctx->user_cookie_offset = compose_sflow_action(ctx->xbridge,
1736 &ctx->xout->odp_actions,
1737 &ctx->xin->flow, ODPP_NONE);
1738 ctx->sflow_odp_port = 0;
1739 ctx->sflow_n_outputs = 0;
1742 /* SAMPLE action for IPFIX must be 1st or 2nd action in any given list
1743 * of actions, eventually after the SAMPLE action for sFlow. */
1745 add_ipfix_action(struct xlate_ctx *ctx)
1747 compose_ipfix_action(ctx->xbridge, &ctx->xout->odp_actions,
1751 /* Fix SAMPLE action according to data collected while composing ODP actions.
1752 * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested
1753 * USERSPACE action's user-cookie which is required for sflow. */
1755 fix_sflow_action(struct xlate_ctx *ctx)
1757 const struct flow *base = &ctx->base_flow;
1758 union user_action_cookie *cookie;
1760 if (!ctx->user_cookie_offset) {
1764 cookie = ofpbuf_at(&ctx->xout->odp_actions, ctx->user_cookie_offset,
1765 sizeof cookie->sflow);
1766 ovs_assert(cookie->type == USER_ACTION_COOKIE_SFLOW);
1768 compose_sflow_cookie(ctx->xbridge, base->vlan_tci,
1769 ctx->sflow_odp_port, ctx->sflow_n_outputs, cookie);
1772 static enum slow_path_reason
1773 process_special(struct xlate_ctx *ctx, const struct flow *flow,
1774 const struct xport *xport, const struct ofpbuf *packet)
1776 struct flow_wildcards *wc = &ctx->xout->wc;
1777 const struct xbridge *xbridge = ctx->xbridge;
1781 } else if (xport->cfm && cfm_should_process_flow(xport->cfm, flow, wc)) {
1783 cfm_process_heartbeat(xport->cfm, packet);
1786 } else if (xport->bfd && bfd_should_process_flow(xport->bfd, flow, wc)) {
1788 bfd_process_packet(xport->bfd, flow, packet);
1789 /* If POLL received, immediately sends FINAL back. */
1790 if (bfd_should_send_packet(xport->bfd)) {
1791 ofproto_dpif_monitor_port_send_soon(xport->ofport);
1795 } else if (xport->xbundle && xport->xbundle->lacp
1796 && flow->dl_type == htons(ETH_TYPE_LACP)) {
1798 lacp_process_packet(xport->xbundle->lacp, xport->ofport, packet);
1801 } else if (xbridge->stp && stp_should_process_flow(flow, wc)) {
1803 stp_process_packet(xport, packet);
1812 compose_output_action__(struct xlate_ctx *ctx, ofp_port_t ofp_port,
1815 const struct xport *xport = get_ofp_port(ctx->xbridge, ofp_port);
1816 struct flow_wildcards *wc = &ctx->xout->wc;
1817 struct flow *flow = &ctx->xin->flow;
1818 ovs_be16 flow_vlan_tci;
1819 uint32_t flow_pkt_mark;
1820 uint8_t flow_nw_tos;
1821 odp_port_t out_port, odp_port;
1824 /* If 'struct flow' gets additional metadata, we'll need to zero it out
1825 * before traversing a patch port. */
1826 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 26);
1829 xlate_report(ctx, "Nonexistent output port");
1831 } else if (xport->config & OFPUTIL_PC_NO_FWD) {
1832 xlate_report(ctx, "OFPPC_NO_FWD set, skipping output");
1834 } else if (check_stp) {
1835 if (is_stp(&ctx->base_flow)) {
1836 if (!xport_stp_listen_state(xport)) {
1837 xlate_report(ctx, "STP not in listening state, "
1838 "skipping bpdu output");
1841 } else if (!xport_stp_forward_state(xport)) {
1842 xlate_report(ctx, "STP not in forwarding state, "
1848 if (mbridge_has_mirrors(ctx->xbridge->mbridge) && xport->xbundle) {
1849 ctx->xout->mirrors |= xbundle_mirror_dst(xport->xbundle->xbridge,
1854 const struct xport *peer = xport->peer;
1855 struct flow old_flow = ctx->xin->flow;
1856 enum slow_path_reason special;
1858 ctx->xbridge = peer->xbridge;
1859 flow->in_port.ofp_port = peer->ofp_port;
1860 flow->metadata = htonll(0);
1861 memset(&flow->tunnel, 0, sizeof flow->tunnel);
1862 memset(flow->regs, 0, sizeof flow->regs);
1864 special = process_special(ctx, &ctx->xin->flow, peer,
1867 ctx->xout->slow |= special;
1868 } else if (may_receive(peer, ctx)) {
1869 if (xport_stp_forward_state(peer)) {
1870 xlate_table_action(ctx, flow->in_port.ofp_port, 0, true, true);
1872 /* Forwarding is disabled by STP. Let OFPP_NORMAL and the
1873 * learning action look at the packet, then drop it. */
1874 struct flow old_base_flow = ctx->base_flow;
1875 size_t old_size = ofpbuf_size(&ctx->xout->odp_actions);
1876 mirror_mask_t old_mirrors = ctx->xout->mirrors;
1877 xlate_table_action(ctx, flow->in_port.ofp_port, 0, true, true);
1878 ctx->xout->mirrors = old_mirrors;
1879 ctx->base_flow = old_base_flow;
1880 ofpbuf_set_size(&ctx->xout->odp_actions, old_size);
1884 ctx->xin->flow = old_flow;
1885 ctx->xbridge = xport->xbridge;
1887 if (ctx->xin->resubmit_stats) {
1888 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
1889 netdev_vport_inc_rx(peer->netdev, ctx->xin->resubmit_stats);
1891 bfd_account_rx(peer->bfd, ctx->xin->resubmit_stats);
1894 if (ctx->xin->xcache) {
1895 struct xc_entry *entry;
1897 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NETDEV);
1898 entry->u.dev.tx = netdev_ref(xport->netdev);
1899 entry->u.dev.rx = netdev_ref(peer->netdev);
1900 entry->u.dev.bfd = bfd_ref(peer->bfd);
1906 flow_vlan_tci = flow->vlan_tci;
1907 flow_pkt_mark = flow->pkt_mark;
1908 flow_nw_tos = flow->nw_tos;
1910 if (dscp_from_skb_priority(xport, flow->skb_priority, &dscp)) {
1911 wc->masks.nw_tos |= IP_DSCP_MASK;
1912 flow->nw_tos &= ~IP_DSCP_MASK;
1913 flow->nw_tos |= dscp;
1916 if (xport->is_tunnel) {
1917 /* Save tunnel metadata so that changes made due to
1918 * the Logical (tunnel) Port are not visible for any further
1919 * matches, while explicit set actions on tunnel metadata are.
1921 struct flow_tnl flow_tnl = flow->tunnel;
1922 odp_port = tnl_port_send(xport->ofport, flow, &ctx->xout->wc);
1923 if (odp_port == ODPP_NONE) {
1924 xlate_report(ctx, "Tunneling decided against output");
1925 goto out; /* restore flow_nw_tos */
1927 if (flow->tunnel.ip_dst == ctx->orig_tunnel_ip_dst) {
1928 xlate_report(ctx, "Not tunneling to our own address");
1929 goto out; /* restore flow_nw_tos */
1931 if (ctx->xin->resubmit_stats) {
1932 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
1934 if (ctx->xin->xcache) {
1935 struct xc_entry *entry;
1937 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NETDEV);
1938 entry->u.dev.tx = netdev_ref(xport->netdev);
1940 out_port = odp_port;
1941 commit_odp_tunnel_action(flow, &ctx->base_flow,
1942 &ctx->xout->odp_actions);
1943 flow->tunnel = flow_tnl; /* Restore tunnel metadata */
1945 odp_port = xport->odp_port;
1946 out_port = odp_port;
1947 if (ofproto_has_vlan_splinters(ctx->xbridge->ofproto)) {
1948 ofp_port_t vlandev_port;
1950 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
1951 vlandev_port = vsp_realdev_to_vlandev(ctx->xbridge->ofproto,
1952 ofp_port, flow->vlan_tci);
1953 if (vlandev_port != ofp_port) {
1954 out_port = ofp_port_to_odp_port(ctx->xbridge, vlandev_port);
1955 flow->vlan_tci = htons(0);
1960 if (out_port != ODPP_NONE) {
1961 ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow,
1962 &ctx->xout->odp_actions,
1965 if (ctx->use_recirc) {
1966 struct ovs_action_hash *act_hash;
1967 struct xlate_recirc *xr = &ctx->recirc;
1970 act_hash = nl_msg_put_unspec_uninit(&ctx->xout->odp_actions,
1971 OVS_ACTION_ATTR_HASH,
1973 act_hash->hash_alg = xr->hash_alg;
1974 act_hash->hash_basis = xr->hash_basis;
1976 /* Recirc action. */
1977 nl_msg_put_u32(&ctx->xout->odp_actions, OVS_ACTION_ATTR_RECIRC,
1980 nl_msg_put_odp_port(&ctx->xout->odp_actions, OVS_ACTION_ATTR_OUTPUT,
1984 ctx->sflow_odp_port = odp_port;
1985 ctx->sflow_n_outputs++;
1986 ctx->xout->nf_output_iface = ofp_port;
1991 flow->vlan_tci = flow_vlan_tci;
1992 flow->pkt_mark = flow_pkt_mark;
1993 flow->nw_tos = flow_nw_tos;
1997 compose_output_action(struct xlate_ctx *ctx, ofp_port_t ofp_port)
1999 compose_output_action__(ctx, ofp_port, true);
2003 xlate_recursively(struct xlate_ctx *ctx, struct rule_dpif *rule)
2005 struct rule_dpif *old_rule = ctx->rule;
2006 const struct rule_actions *actions;
2008 if (ctx->xin->resubmit_stats) {
2009 rule_dpif_credit_stats(rule, ctx->xin->resubmit_stats);
2015 actions = rule_dpif_get_actions(rule);
2016 do_xlate_actions(actions->ofpacts, actions->ofpacts_len, ctx);
2017 ctx->rule = old_rule;
2022 xlate_resubmit_resource_check(struct xlate_ctx *ctx)
2024 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
2026 if (ctx->recurse >= MAX_RESUBMIT_RECURSION + MAX_INTERNAL_RESUBMITS) {
2027 VLOG_ERR_RL(&rl, "resubmit actions recursed over %d times",
2028 MAX_RESUBMIT_RECURSION);
2029 } else if (ctx->resubmits >= MAX_RESUBMITS + MAX_INTERNAL_RESUBMITS) {
2030 VLOG_ERR_RL(&rl, "over %d resubmit actions", MAX_RESUBMITS);
2031 } else if (ofpbuf_size(&ctx->xout->odp_actions) > UINT16_MAX) {
2032 VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of actions");
2033 } else if (ofpbuf_size(&ctx->stack) >= 65536) {
2034 VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of stack");
2043 xlate_table_action(struct xlate_ctx *ctx, ofp_port_t in_port, uint8_t table_id,
2044 bool may_packet_in, bool honor_table_miss)
2046 if (xlate_resubmit_resource_check(ctx)) {
2047 ofp_port_t old_in_port = ctx->xin->flow.in_port.ofp_port;
2048 bool skip_wildcards = ctx->xin->skip_wildcards;
2049 uint8_t old_table_id = ctx->table_id;
2050 struct rule_dpif *rule;
2051 enum rule_dpif_lookup_verdict verdict;
2052 enum ofputil_port_config config = 0;
2054 ctx->table_id = table_id;
2056 /* Look up a flow with 'in_port' as the input port. Then restore the
2057 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
2058 * have surprising behavior). */
2059 ctx->xin->flow.in_port.ofp_port = in_port;
2060 verdict = rule_dpif_lookup_from_table(ctx->xbridge->ofproto,
2063 ? &ctx->xout->wc : NULL,
2065 &ctx->table_id, &rule,
2066 ctx->xin->xcache != NULL,
2067 ctx->xin->resubmit_stats);
2068 ctx->xin->flow.in_port.ofp_port = old_in_port;
2070 if (ctx->xin->resubmit_hook) {
2071 ctx->xin->resubmit_hook(ctx->xin, rule, ctx->recurse);
2075 case RULE_DPIF_LOOKUP_VERDICT_MATCH:
2077 case RULE_DPIF_LOOKUP_VERDICT_CONTROLLER:
2078 if (may_packet_in) {
2079 struct xport *xport;
2081 xport = get_ofp_port(ctx->xbridge,
2082 ctx->xin->flow.in_port.ofp_port);
2083 config = xport ? xport->config : 0;
2086 /* Fall through to drop */
2087 case RULE_DPIF_LOOKUP_VERDICT_DROP:
2088 config = OFPUTIL_PC_NO_PACKET_IN;
2090 case RULE_DPIF_LOOKUP_VERDICT_DEFAULT:
2091 if (!ofproto_dpif_wants_packet_in_on_miss(ctx->xbridge->ofproto)) {
2092 config = OFPUTIL_PC_NO_PACKET_IN;
2099 choose_miss_rule(config, ctx->xbridge->miss_rule,
2100 ctx->xbridge->no_packet_in_rule, &rule,
2101 ctx->xin->xcache != NULL);
2105 /* Fill in the cache entry here instead of xlate_recursively
2106 * to make the reference counting more explicit. We take a
2107 * reference in the lookups above if we are going to cache the
2109 if (ctx->xin->xcache) {
2110 struct xc_entry *entry;
2112 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_RULE);
2113 entry->u.rule = rule;
2115 xlate_recursively(ctx, rule);
2118 ctx->table_id = old_table_id;
2126 xlate_group_stats(struct xlate_ctx *ctx, struct group_dpif *group,
2127 struct ofputil_bucket *bucket)
2129 if (ctx->xin->resubmit_stats) {
2130 group_dpif_credit_stats(group, bucket, ctx->xin->resubmit_stats);
2132 if (ctx->xin->xcache) {
2133 struct xc_entry *entry;
2135 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_GROUP);
2136 entry->u.group.group = group_dpif_ref(group);
2137 entry->u.group.bucket = bucket;
2142 xlate_group_bucket(struct xlate_ctx *ctx, struct ofputil_bucket *bucket)
2144 uint64_t action_list_stub[1024 / 8];
2145 struct ofpbuf action_list, action_set;
2147 ofpbuf_use_const(&action_set, bucket->ofpacts, bucket->ofpacts_len);
2148 ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub);
2150 ofpacts_execute_action_set(&action_list, &action_set);
2152 do_xlate_actions(ofpbuf_data(&action_list), ofpbuf_size(&action_list), ctx);
2155 ofpbuf_uninit(&action_set);
2156 ofpbuf_uninit(&action_list);
2160 xlate_all_group(struct xlate_ctx *ctx, struct group_dpif *group)
2162 struct ofputil_bucket *bucket;
2163 const struct list *buckets;
2164 struct flow old_flow = ctx->xin->flow;
2166 group_dpif_get_buckets(group, &buckets);
2168 LIST_FOR_EACH (bucket, list_node, buckets) {
2169 xlate_group_bucket(ctx, bucket);
2170 /* Roll back flow to previous state.
2171 * This is equivalent to cloning the packet for each bucket.
2173 * As a side effect any subsequently applied actions will
2174 * also effectively be applied to a clone of the packet taken
2175 * just before applying the all or indirect group. */
2176 ctx->xin->flow = old_flow;
2178 xlate_group_stats(ctx, group, NULL);
2182 xlate_ff_group(struct xlate_ctx *ctx, struct group_dpif *group)
2184 struct ofputil_bucket *bucket;
2186 bucket = group_first_live_bucket(ctx, group, 0);
2188 xlate_group_bucket(ctx, bucket);
2189 xlate_group_stats(ctx, group, bucket);
2194 xlate_select_group(struct xlate_ctx *ctx, struct group_dpif *group)
2196 struct flow_wildcards *wc = &ctx->xout->wc;
2197 struct ofputil_bucket *bucket;
2200 basis = hash_mac(ctx->xin->flow.dl_dst, 0, 0);
2201 bucket = group_best_live_bucket(ctx, group, basis);
2203 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
2204 xlate_group_bucket(ctx, bucket);
2205 xlate_group_stats(ctx, group, bucket);
2210 xlate_group_action__(struct xlate_ctx *ctx, struct group_dpif *group)
2212 ctx->in_group = true;
2214 switch (group_dpif_get_type(group)) {
2216 case OFPGT11_INDIRECT:
2217 xlate_all_group(ctx, group);
2219 case OFPGT11_SELECT:
2220 xlate_select_group(ctx, group);
2223 xlate_ff_group(ctx, group);
2228 group_dpif_unref(group);
2230 ctx->in_group = false;
2234 xlate_group_resource_check(struct xlate_ctx *ctx)
2236 if (!xlate_resubmit_resource_check(ctx)) {
2238 } else if (ctx->in_group) {
2239 /* Prevent nested translation of OpenFlow groups.
2241 * OpenFlow allows this restriction. We enforce this restriction only
2242 * because, with the current architecture, we would otherwise have to
2243 * take a possibly recursive read lock on the ofgroup rwlock, which is
2244 * unsafe given that POSIX allows taking a read lock to block if there
2245 * is a thread blocked on taking the write lock. Other solutions
2246 * without this restriction are also possible, but seem unwarranted
2247 * given the current limited use of groups. */
2248 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
2250 VLOG_ERR_RL(&rl, "cannot recursively translate OpenFlow group");
2258 xlate_group_action(struct xlate_ctx *ctx, uint32_t group_id)
2260 if (xlate_group_resource_check(ctx)) {
2261 struct group_dpif *group;
2264 got_group = group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group);
2266 xlate_group_action__(ctx, group);
2276 xlate_ofpact_resubmit(struct xlate_ctx *ctx,
2277 const struct ofpact_resubmit *resubmit)
2281 bool may_packet_in = false;
2282 bool honor_table_miss = false;
2284 if (ctx->rule && rule_dpif_is_internal(ctx->rule)) {
2285 /* Still allow missed packets to be sent to the controller
2286 * if resubmitting from an internal table. */
2287 may_packet_in = true;
2288 honor_table_miss = true;
2291 in_port = resubmit->in_port;
2292 if (in_port == OFPP_IN_PORT) {
2293 in_port = ctx->xin->flow.in_port.ofp_port;
2296 table_id = resubmit->table_id;
2297 if (table_id == 255) {
2298 table_id = ctx->table_id;
2301 xlate_table_action(ctx, in_port, table_id, may_packet_in,
2306 flood_packets(struct xlate_ctx *ctx, bool all)
2308 const struct xport *xport;
2310 HMAP_FOR_EACH (xport, ofp_node, &ctx->xbridge->xports) {
2311 if (xport->ofp_port == ctx->xin->flow.in_port.ofp_port) {
2316 compose_output_action__(ctx, xport->ofp_port, false);
2317 } else if (!(xport->config & OFPUTIL_PC_NO_FLOOD)) {
2318 compose_output_action(ctx, xport->ofp_port);
2322 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
2326 execute_controller_action(struct xlate_ctx *ctx, int len,
2327 enum ofp_packet_in_reason reason,
2328 uint16_t controller_id)
2330 struct ofproto_packet_in *pin;
2331 struct ofpbuf *packet;
2332 struct pkt_metadata md = PKT_METADATA_INITIALIZER(0);
2334 ctx->xout->slow |= SLOW_CONTROLLER;
2335 if (!ctx->xin->packet) {
2339 packet = ofpbuf_clone(ctx->xin->packet);
2341 ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
2342 &ctx->xout->odp_actions,
2345 odp_execute_actions(NULL, packet, false, &md,
2346 ofpbuf_data(&ctx->xout->odp_actions),
2347 ofpbuf_size(&ctx->xout->odp_actions), NULL);
2349 pin = xmalloc(sizeof *pin);
2350 pin->up.packet_len = ofpbuf_size(packet);
2351 pin->up.packet = ofpbuf_steal_data(packet);
2352 pin->up.reason = reason;
2353 pin->up.table_id = ctx->table_id;
2354 pin->up.cookie = (ctx->rule
2355 ? rule_dpif_get_flow_cookie(ctx->rule)
2358 flow_get_metadata(&ctx->xin->flow, &pin->up.fmd);
2360 pin->controller_id = controller_id;
2361 pin->send_len = len;
2362 /* If a rule is a table-miss rule then this is
2363 * a table-miss handled by a table-miss rule.
2365 * Else, if rule is internal and has a controller action,
2366 * the later being implied by the rule being processed here,
2367 * then this is a table-miss handled without a table-miss rule.
2369 * Otherwise this is not a table-miss. */
2370 pin->miss_type = OFPROTO_PACKET_IN_NO_MISS;
2372 if (rule_dpif_is_table_miss(ctx->rule)) {
2373 pin->miss_type = OFPROTO_PACKET_IN_MISS_FLOW;
2374 } else if (rule_dpif_is_internal(ctx->rule)) {
2375 pin->miss_type = OFPROTO_PACKET_IN_MISS_WITHOUT_FLOW;
2378 ofproto_dpif_send_packet_in(ctx->xbridge->ofproto, pin);
2379 ofpbuf_delete(packet);
2383 compose_mpls_push_action(struct xlate_ctx *ctx, struct ofpact_push_mpls *mpls)
2385 struct flow_wildcards *wc = &ctx->xout->wc;
2386 struct flow *flow = &ctx->xin->flow;
2389 ovs_assert(eth_type_mpls(mpls->ethertype));
2391 n = flow_count_mpls_labels(flow, wc);
2393 ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow,
2394 &ctx->xout->odp_actions,
2396 } else if (n >= FLOW_MAX_MPLS_LABELS) {
2397 if (ctx->xin->packet != NULL) {
2398 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2399 VLOG_WARN_RL(&rl, "bridge %s: dropping packet on which an "
2400 "MPLS push action can't be performed as it would "
2401 "have more MPLS LSEs than the %d supported.",
2402 ctx->xbridge->name, FLOW_MAX_MPLS_LABELS);
2406 } else if (n >= ctx->xbridge->max_mpls_depth) {
2407 COVERAGE_INC(xlate_actions_mpls_overflow);
2408 ctx->xout->slow |= SLOW_ACTION;
2411 flow_push_mpls(flow, n, mpls->ethertype, wc);
2415 compose_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type)
2417 struct flow_wildcards *wc = &ctx->xout->wc;
2418 struct flow *flow = &ctx->xin->flow;
2419 int n = flow_count_mpls_labels(flow, wc);
2421 if (!flow_pop_mpls(flow, n, eth_type, wc) && n >= FLOW_MAX_MPLS_LABELS) {
2422 if (ctx->xin->packet != NULL) {
2423 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2424 VLOG_WARN_RL(&rl, "bridge %s: dropping packet on which an "
2425 "MPLS pop action can't be performed as it has "
2426 "more MPLS LSEs than the %d supported.",
2427 ctx->xbridge->name, FLOW_MAX_MPLS_LABELS);
2430 ofpbuf_clear(&ctx->xout->odp_actions);
2435 compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids)
2437 struct flow *flow = &ctx->xin->flow;
2439 if (!is_ip_any(flow)) {
2443 ctx->xout->wc.masks.nw_ttl = 0xff;
2444 if (flow->nw_ttl > 1) {
2450 for (i = 0; i < ids->n_controllers; i++) {
2451 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL,
2455 /* Stop processing for current table. */
2461 compose_set_mpls_label_action(struct xlate_ctx *ctx, ovs_be32 label)
2463 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
2464 ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_LABEL_MASK);
2465 set_mpls_lse_label(&ctx->xin->flow.mpls_lse[0], label);
2470 compose_set_mpls_tc_action(struct xlate_ctx *ctx, uint8_t tc)
2472 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
2473 ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_TC_MASK);
2474 set_mpls_lse_tc(&ctx->xin->flow.mpls_lse[0], tc);
2479 compose_set_mpls_ttl_action(struct xlate_ctx *ctx, uint8_t ttl)
2481 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
2482 ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_TTL_MASK);
2483 set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse[0], ttl);
2488 compose_dec_mpls_ttl_action(struct xlate_ctx *ctx)
2490 struct flow *flow = &ctx->xin->flow;
2491 uint8_t ttl = mpls_lse_to_ttl(flow->mpls_lse[0]);
2492 struct flow_wildcards *wc = &ctx->xout->wc;
2494 memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse);
2495 if (eth_type_mpls(flow->dl_type)) {
2498 set_mpls_lse_ttl(&flow->mpls_lse[0], ttl);
2501 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, 0);
2503 /* Stop processing for current table. */
2512 xlate_output_action(struct xlate_ctx *ctx,
2513 ofp_port_t port, uint16_t max_len, bool may_packet_in)
2515 ofp_port_t prev_nf_output_iface = ctx->xout->nf_output_iface;
2517 ctx->xout->nf_output_iface = NF_OUT_DROP;
2521 compose_output_action(ctx, ctx->xin->flow.in_port.ofp_port);
2524 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
2525 0, may_packet_in, true);
2531 flood_packets(ctx, false);
2534 flood_packets(ctx, true);
2536 case OFPP_CONTROLLER:
2537 execute_controller_action(ctx, max_len, OFPR_ACTION, 0);
2543 if (port != ctx->xin->flow.in_port.ofp_port) {
2544 compose_output_action(ctx, port);
2546 xlate_report(ctx, "skipping output to input port");
2551 if (prev_nf_output_iface == NF_OUT_FLOOD) {
2552 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
2553 } else if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
2554 ctx->xout->nf_output_iface = prev_nf_output_iface;
2555 } else if (prev_nf_output_iface != NF_OUT_DROP &&
2556 ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
2557 ctx->xout->nf_output_iface = NF_OUT_MULTI;
2562 xlate_output_reg_action(struct xlate_ctx *ctx,
2563 const struct ofpact_output_reg *or)
2565 uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow);
2566 if (port <= UINT16_MAX) {
2567 union mf_subvalue value;
2569 memset(&value, 0xff, sizeof value);
2570 mf_write_subfield_flow(&or->src, &value, &ctx->xout->wc.masks);
2571 xlate_output_action(ctx, u16_to_ofp(port),
2572 or->max_len, false);
2577 xlate_enqueue_action(struct xlate_ctx *ctx,
2578 const struct ofpact_enqueue *enqueue)
2580 ofp_port_t ofp_port = enqueue->port;
2581 uint32_t queue_id = enqueue->queue;
2582 uint32_t flow_priority, priority;
2585 /* Translate queue to priority. */
2586 error = dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &priority);
2588 /* Fall back to ordinary output action. */
2589 xlate_output_action(ctx, enqueue->port, 0, false);
2593 /* Check output port. */
2594 if (ofp_port == OFPP_IN_PORT) {
2595 ofp_port = ctx->xin->flow.in_port.ofp_port;
2596 } else if (ofp_port == ctx->xin->flow.in_port.ofp_port) {
2600 /* Add datapath actions. */
2601 flow_priority = ctx->xin->flow.skb_priority;
2602 ctx->xin->flow.skb_priority = priority;
2603 compose_output_action(ctx, ofp_port);
2604 ctx->xin->flow.skb_priority = flow_priority;
2606 /* Update NetFlow output port. */
2607 if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
2608 ctx->xout->nf_output_iface = ofp_port;
2609 } else if (ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
2610 ctx->xout->nf_output_iface = NF_OUT_MULTI;
2615 xlate_set_queue_action(struct xlate_ctx *ctx, uint32_t queue_id)
2617 uint32_t skb_priority;
2619 if (!dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &skb_priority)) {
2620 ctx->xin->flow.skb_priority = skb_priority;
2622 /* Couldn't translate queue to a priority. Nothing to do. A warning
2623 * has already been logged. */
2628 slave_enabled_cb(ofp_port_t ofp_port, void *xbridge_)
2630 const struct xbridge *xbridge = xbridge_;
2641 case OFPP_CONTROLLER: /* Not supported by the bundle action. */
2644 port = get_ofp_port(xbridge, ofp_port);
2645 return port ? port->may_enable : false;
2650 xlate_bundle_action(struct xlate_ctx *ctx,
2651 const struct ofpact_bundle *bundle)
2655 port = bundle_execute(bundle, &ctx->xin->flow, &ctx->xout->wc,
2657 CONST_CAST(struct xbridge *, ctx->xbridge));
2658 if (bundle->dst.field) {
2659 nxm_reg_load(&bundle->dst, ofp_to_u16(port), &ctx->xin->flow,
2662 xlate_output_action(ctx, port, 0, false);
2667 xlate_learn_action(struct xlate_ctx *ctx,
2668 const struct ofpact_learn *learn)
2670 uint64_t ofpacts_stub[1024 / 8];
2671 struct ofputil_flow_mod fm;
2672 struct ofpbuf ofpacts;
2674 ctx->xout->has_learn = true;
2676 learn_mask(learn, &ctx->xout->wc);
2678 if (!ctx->xin->may_learn) {
2682 ofpbuf_use_stub(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
2683 learn_execute(learn, &ctx->xin->flow, &fm, &ofpacts);
2684 ofproto_dpif_flow_mod(ctx->xbridge->ofproto, &fm);
2685 ofpbuf_uninit(&ofpacts);
2687 if (ctx->xin->xcache) {
2688 struct xc_entry *entry;
2690 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_LEARN);
2691 /* Lookup the learned rule, taking a reference on it. The reference
2692 * is released when this cache entry is deleted. */
2693 rule_dpif_lookup(ctx->xbridge->ofproto, &ctx->xin->flow, NULL,
2694 &entry->u.learn.rule, true, NULL);
2699 xlate_fin_timeout__(struct rule_dpif *rule, uint16_t tcp_flags,
2700 uint16_t idle_timeout, uint16_t hard_timeout)
2702 if (tcp_flags & (TCP_FIN | TCP_RST)) {
2703 rule_dpif_reduce_timeouts(rule, idle_timeout, hard_timeout);
2708 xlate_fin_timeout(struct xlate_ctx *ctx,
2709 const struct ofpact_fin_timeout *oft)
2712 xlate_fin_timeout__(ctx->rule, ctx->xin->tcp_flags,
2713 oft->fin_idle_timeout, oft->fin_hard_timeout);
2714 if (ctx->xin->xcache) {
2715 struct xc_entry *entry;
2717 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_FIN_TIMEOUT);
2718 /* XC_RULE already holds a reference on the rule, none is taken
2720 entry->u.fin.rule = ctx->rule;
2721 entry->u.fin.idle = oft->fin_idle_timeout;
2722 entry->u.fin.hard = oft->fin_hard_timeout;
2728 xlate_sample_action(struct xlate_ctx *ctx,
2729 const struct ofpact_sample *os)
2731 union user_action_cookie cookie;
2732 /* Scale the probability from 16-bit to 32-bit while representing
2733 * the same percentage. */
2734 uint32_t probability = (os->probability << 16) | os->probability;
2736 if (!ctx->xbridge->variable_length_userdata) {
2737 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
2739 VLOG_ERR_RL(&rl, "ignoring NXAST_SAMPLE action because datapath "
2740 "lacks support (needs Linux 3.10+ or kernel module from "
2745 ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
2746 &ctx->xout->odp_actions,
2749 compose_flow_sample_cookie(os->probability, os->collector_set_id,
2750 os->obs_domain_id, os->obs_point_id, &cookie);
2751 compose_sample_action(ctx->xbridge, &ctx->xout->odp_actions, &ctx->xin->flow,
2752 probability, &cookie, sizeof cookie.flow_sample);
2756 may_receive(const struct xport *xport, struct xlate_ctx *ctx)
2758 if (xport->config & (is_stp(&ctx->xin->flow)
2759 ? OFPUTIL_PC_NO_RECV_STP
2760 : OFPUTIL_PC_NO_RECV)) {
2764 /* Only drop packets here if both forwarding and learning are
2765 * disabled. If just learning is enabled, we need to have
2766 * OFPP_NORMAL and the learning action have a look at the packet
2767 * before we can drop it. */
2768 if (!xport_stp_forward_state(xport) && !xport_stp_learn_state(xport)) {
2776 xlate_write_actions(struct xlate_ctx *ctx, const struct ofpact *a)
2778 struct ofpact_nest *on = ofpact_get_WRITE_ACTIONS(a);
2779 ofpbuf_put(&ctx->action_set, on->actions, ofpact_nest_get_action_len(on));
2780 ofpact_pad(&ctx->action_set);
2784 xlate_action_set(struct xlate_ctx *ctx)
2786 uint64_t action_list_stub[1024 / 64];
2787 struct ofpbuf action_list;
2789 ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub);
2790 ofpacts_execute_action_set(&action_list, &ctx->action_set);
2791 do_xlate_actions(ofpbuf_data(&action_list), ofpbuf_size(&action_list), ctx);
2792 ofpbuf_uninit(&action_list);
2796 do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len,
2797 struct xlate_ctx *ctx)
2799 struct flow_wildcards *wc = &ctx->xout->wc;
2800 struct flow *flow = &ctx->xin->flow;
2801 const struct ofpact *a;
2803 /* dl_type already in the mask, not set below. */
2805 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
2806 struct ofpact_controller *controller;
2807 const struct ofpact_metadata *metadata;
2808 const struct ofpact_set_field *set_field;
2809 const struct mf_field *mf;
2817 xlate_output_action(ctx, ofpact_get_OUTPUT(a)->port,
2818 ofpact_get_OUTPUT(a)->max_len, true);
2822 if (xlate_group_action(ctx, ofpact_get_GROUP(a)->group_id)) {
2827 case OFPACT_CONTROLLER:
2828 controller = ofpact_get_CONTROLLER(a);
2829 execute_controller_action(ctx, controller->max_len,
2831 controller->controller_id);
2834 case OFPACT_ENQUEUE:
2835 xlate_enqueue_action(ctx, ofpact_get_ENQUEUE(a));
2838 case OFPACT_SET_VLAN_VID:
2839 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
2840 if (flow->vlan_tci & htons(VLAN_CFI) ||
2841 ofpact_get_SET_VLAN_VID(a)->push_vlan_if_needed) {
2842 flow->vlan_tci &= ~htons(VLAN_VID_MASK);
2843 flow->vlan_tci |= (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid)
2848 case OFPACT_SET_VLAN_PCP:
2849 wc->masks.vlan_tci |= htons(VLAN_PCP_MASK | VLAN_CFI);
2850 if (flow->vlan_tci & htons(VLAN_CFI) ||
2851 ofpact_get_SET_VLAN_PCP(a)->push_vlan_if_needed) {
2852 flow->vlan_tci &= ~htons(VLAN_PCP_MASK);
2853 flow->vlan_tci |= htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp
2854 << VLAN_PCP_SHIFT) | VLAN_CFI);
2858 case OFPACT_STRIP_VLAN:
2859 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
2860 flow->vlan_tci = htons(0);
2863 case OFPACT_PUSH_VLAN:
2864 /* XXX 802.1AD(QinQ) */
2865 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
2866 flow->vlan_tci = htons(VLAN_CFI);
2869 case OFPACT_SET_ETH_SRC:
2870 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
2871 memcpy(flow->dl_src, ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN);
2874 case OFPACT_SET_ETH_DST:
2875 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
2876 memcpy(flow->dl_dst, ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN);
2879 case OFPACT_SET_IPV4_SRC:
2880 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2881 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
2882 flow->nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4;
2886 case OFPACT_SET_IPV4_DST:
2887 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2888 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
2889 flow->nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4;
2893 case OFPACT_SET_IP_DSCP:
2894 if (is_ip_any(flow)) {
2895 wc->masks.nw_tos |= IP_DSCP_MASK;
2896 flow->nw_tos &= ~IP_DSCP_MASK;
2897 flow->nw_tos |= ofpact_get_SET_IP_DSCP(a)->dscp;
2901 case OFPACT_SET_IP_ECN:
2902 if (is_ip_any(flow)) {
2903 wc->masks.nw_tos |= IP_ECN_MASK;
2904 flow->nw_tos &= ~IP_ECN_MASK;
2905 flow->nw_tos |= ofpact_get_SET_IP_ECN(a)->ecn;
2909 case OFPACT_SET_IP_TTL:
2910 if (is_ip_any(flow)) {
2911 wc->masks.nw_ttl = 0xff;
2912 flow->nw_ttl = ofpact_get_SET_IP_TTL(a)->ttl;
2916 case OFPACT_SET_L4_SRC_PORT:
2917 if (is_ip_any(flow)) {
2918 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2919 memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src);
2920 flow->tp_src = htons(ofpact_get_SET_L4_SRC_PORT(a)->port);
2924 case OFPACT_SET_L4_DST_PORT:
2925 if (is_ip_any(flow)) {
2926 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2927 memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst);
2928 flow->tp_dst = htons(ofpact_get_SET_L4_DST_PORT(a)->port);
2932 case OFPACT_RESUBMIT:
2933 xlate_ofpact_resubmit(ctx, ofpact_get_RESUBMIT(a));
2936 case OFPACT_SET_TUNNEL:
2937 flow->tunnel.tun_id = htonll(ofpact_get_SET_TUNNEL(a)->tun_id);
2940 case OFPACT_SET_QUEUE:
2941 xlate_set_queue_action(ctx, ofpact_get_SET_QUEUE(a)->queue_id);
2944 case OFPACT_POP_QUEUE:
2945 flow->skb_priority = ctx->orig_skb_priority;
2948 case OFPACT_REG_MOVE:
2949 nxm_execute_reg_move(ofpact_get_REG_MOVE(a), flow, wc);
2952 case OFPACT_REG_LOAD:
2953 nxm_execute_reg_load(ofpact_get_REG_LOAD(a), flow, wc);
2956 case OFPACT_SET_FIELD:
2957 set_field = ofpact_get_SET_FIELD(a);
2958 mf = set_field->field;
2960 /* Set field action only ever overwrites packet's outermost
2961 * applicable header fields. Do nothing if no header exists. */
2962 if (mf->id == MFF_VLAN_VID) {
2963 wc->masks.vlan_tci |= htons(VLAN_CFI);
2964 if (!(flow->vlan_tci & htons(VLAN_CFI))) {
2967 } else if ((mf->id == MFF_MPLS_LABEL || mf->id == MFF_MPLS_TC)
2968 /* 'dl_type' is already unwildcarded. */
2969 && !eth_type_mpls(flow->dl_type)) {
2973 mf_mask_field_and_prereqs(mf, &wc->masks);
2974 mf_set_flow_value(mf, &set_field->value, flow);
2977 case OFPACT_STACK_PUSH:
2978 nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), flow, wc,
2982 case OFPACT_STACK_POP:
2983 nxm_execute_stack_pop(ofpact_get_STACK_POP(a), flow, wc,
2987 case OFPACT_PUSH_MPLS:
2988 compose_mpls_push_action(ctx, ofpact_get_PUSH_MPLS(a));
2991 case OFPACT_POP_MPLS:
2992 compose_mpls_pop_action(ctx, ofpact_get_POP_MPLS(a)->ethertype);
2995 case OFPACT_SET_MPLS_LABEL:
2996 compose_set_mpls_label_action(
2997 ctx, ofpact_get_SET_MPLS_LABEL(a)->label);
3000 case OFPACT_SET_MPLS_TC:
3001 compose_set_mpls_tc_action(ctx, ofpact_get_SET_MPLS_TC(a)->tc);
3004 case OFPACT_SET_MPLS_TTL:
3005 compose_set_mpls_ttl_action(ctx, ofpact_get_SET_MPLS_TTL(a)->ttl);
3008 case OFPACT_DEC_MPLS_TTL:
3009 if (compose_dec_mpls_ttl_action(ctx)) {
3014 case OFPACT_DEC_TTL:
3015 wc->masks.nw_ttl = 0xff;
3016 if (compose_dec_ttl(ctx, ofpact_get_DEC_TTL(a))) {
3022 /* Nothing to do. */
3025 case OFPACT_MULTIPATH:
3026 multipath_execute(ofpact_get_MULTIPATH(a), flow, wc);
3030 xlate_bundle_action(ctx, ofpact_get_BUNDLE(a));
3033 case OFPACT_OUTPUT_REG:
3034 xlate_output_reg_action(ctx, ofpact_get_OUTPUT_REG(a));
3038 xlate_learn_action(ctx, ofpact_get_LEARN(a));
3045 case OFPACT_FIN_TIMEOUT:
3046 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
3047 ctx->xout->has_fin_timeout = true;
3048 xlate_fin_timeout(ctx, ofpact_get_FIN_TIMEOUT(a));
3051 case OFPACT_CLEAR_ACTIONS:
3052 ofpbuf_clear(&ctx->action_set);
3055 case OFPACT_WRITE_ACTIONS:
3056 xlate_write_actions(ctx, a);
3059 case OFPACT_WRITE_METADATA:
3060 metadata = ofpact_get_WRITE_METADATA(a);
3061 flow->metadata &= ~metadata->mask;
3062 flow->metadata |= metadata->metadata & metadata->mask;
3066 /* Not implemented yet. */
3069 case OFPACT_GOTO_TABLE: {
3070 struct ofpact_goto_table *ogt = ofpact_get_GOTO_TABLE(a);
3072 ovs_assert(ctx->table_id < ogt->table_id);
3073 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
3074 ogt->table_id, true, true);
3079 xlate_sample_action(ctx, ofpact_get_SAMPLE(a));
3086 xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto,
3087 const struct flow *flow, struct rule_dpif *rule,
3088 uint16_t tcp_flags, const struct ofpbuf *packet)
3090 xin->ofproto = ofproto;
3092 xin->packet = packet;
3093 xin->may_learn = packet != NULL;
3096 xin->ofpacts = NULL;
3097 xin->ofpacts_len = 0;
3098 xin->tcp_flags = tcp_flags;
3099 xin->resubmit_hook = NULL;
3100 xin->report_hook = NULL;
3101 xin->resubmit_stats = NULL;
3102 xin->skip_wildcards = false;
3106 xlate_out_uninit(struct xlate_out *xout)
3109 ofpbuf_uninit(&xout->odp_actions);
3113 /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts'
3114 * into datapath actions, using 'ctx', and discards the datapath actions. */
3116 xlate_actions_for_side_effects(struct xlate_in *xin)
3118 struct xlate_out xout;
3120 xlate_actions(xin, &xout);
3121 xlate_out_uninit(&xout);
3125 xlate_report(struct xlate_ctx *ctx, const char *s)
3127 if (ctx->xin->report_hook) {
3128 ctx->xin->report_hook(ctx->xin, s, ctx->recurse);
3133 xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src)
3136 dst->slow = src->slow;
3137 dst->has_learn = src->has_learn;
3138 dst->has_normal = src->has_normal;
3139 dst->has_fin_timeout = src->has_fin_timeout;
3140 dst->nf_output_iface = src->nf_output_iface;
3141 dst->mirrors = src->mirrors;
3143 ofpbuf_use_stub(&dst->odp_actions, dst->odp_actions_stub,
3144 sizeof dst->odp_actions_stub);
3145 ofpbuf_put(&dst->odp_actions, ofpbuf_data(&src->odp_actions),
3146 ofpbuf_size(&src->odp_actions));
3149 static struct skb_priority_to_dscp *
3150 get_skb_priority(const struct xport *xport, uint32_t skb_priority)
3152 struct skb_priority_to_dscp *pdscp;
3155 hash = hash_int(skb_priority, 0);
3156 HMAP_FOR_EACH_IN_BUCKET (pdscp, hmap_node, hash, &xport->skb_priorities) {
3157 if (pdscp->skb_priority == skb_priority) {
3165 dscp_from_skb_priority(const struct xport *xport, uint32_t skb_priority,
3168 struct skb_priority_to_dscp *pdscp = get_skb_priority(xport, skb_priority);
3169 *dscp = pdscp ? pdscp->dscp : 0;
3170 return pdscp != NULL;
3174 clear_skb_priorities(struct xport *xport)
3176 struct skb_priority_to_dscp *pdscp, *next;
3178 HMAP_FOR_EACH_SAFE (pdscp, next, hmap_node, &xport->skb_priorities) {
3179 hmap_remove(&xport->skb_priorities, &pdscp->hmap_node);
3185 actions_output_to_local_port(const struct xlate_ctx *ctx)
3187 odp_port_t local_odp_port = ofp_port_to_odp_port(ctx->xbridge, OFPP_LOCAL);
3188 const struct nlattr *a;
3191 NL_ATTR_FOR_EACH_UNSAFE (a, left, ofpbuf_data(&ctx->xout->odp_actions),
3192 ofpbuf_size(&ctx->xout->odp_actions)) {
3193 if (nl_attr_type(a) == OVS_ACTION_ATTR_OUTPUT
3194 && nl_attr_get_odp_port(a) == local_odp_port) {
3201 /* Thread safe call to xlate_actions__(). */
3203 xlate_actions(struct xlate_in *xin, struct xlate_out *xout)
3204 OVS_EXCLUDED(xlate_rwlock)
3206 ovs_rwlock_rdlock(&xlate_rwlock);
3207 xlate_actions__(xin, xout);
3208 ovs_rwlock_unlock(&xlate_rwlock);
3211 /* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts'
3212 * into datapath actions in 'odp_actions', using 'ctx'.
3214 * The caller must take responsibility for eventually freeing 'xout', with
3215 * xlate_out_uninit(). */
3217 xlate_actions__(struct xlate_in *xin, struct xlate_out *xout)
3218 OVS_REQ_RDLOCK(xlate_rwlock)
3220 struct flow_wildcards *wc = &xout->wc;
3221 struct flow *flow = &xin->flow;
3222 struct rule_dpif *rule = NULL;
3224 const struct rule_actions *actions = NULL;
3225 enum slow_path_reason special;
3226 const struct ofpact *ofpacts;
3227 struct xport *in_port;
3228 struct flow orig_flow;
3229 struct xlate_ctx ctx;
3234 COVERAGE_INC(xlate_actions);
3236 /* Flow initialization rules:
3237 * - 'base_flow' must match the kernel's view of the packet at the
3238 * time that action processing starts. 'flow' represents any
3239 * transformations we wish to make through actions.
3240 * - By default 'base_flow' and 'flow' are the same since the input
3241 * packet matches the output before any actions are applied.
3242 * - When using VLAN splinters, 'base_flow''s VLAN is set to the value
3243 * of the received packet as seen by the kernel. If we later output
3244 * to another device without any modifications this will cause us to
3245 * insert a new tag since the original one was stripped off by the
3247 * - Tunnel metadata as received is retained in 'flow'. This allows
3248 * tunnel metadata matching also in later tables.
3249 * Since a kernel action for setting the tunnel metadata will only be
3250 * generated with actual tunnel output, changing the tunnel metadata
3251 * values in 'flow' (such as tun_id) will only have effect with a later
3252 * tunnel output action.
3253 * - Tunnel 'base_flow' is completely cleared since that is what the
3254 * kernel does. If we wish to maintain the original values an action
3255 * needs to be generated. */
3260 ctx.xout->has_learn = false;
3261 ctx.xout->has_normal = false;
3262 ctx.xout->has_fin_timeout = false;
3263 ctx.xout->nf_output_iface = NF_OUT_DROP;
3264 ctx.xout->mirrors = 0;
3265 ofpbuf_use_stub(&ctx.xout->odp_actions, ctx.xout->odp_actions_stub,
3266 sizeof ctx.xout->odp_actions_stub);
3267 ofpbuf_reserve(&ctx.xout->odp_actions, NL_A_U32_SIZE);
3269 ctx.xbridge = xbridge_lookup(xin->ofproto);
3274 ctx.rule = xin->rule;
3276 ctx.base_flow = *flow;
3277 memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel);
3278 ctx.orig_tunnel_ip_dst = flow->tunnel.ip_dst;
3280 flow_wildcards_init_catchall(wc);
3281 memset(&wc->masks.in_port, 0xff, sizeof wc->masks.in_port);
3282 memset(&wc->masks.skb_priority, 0xff, sizeof wc->masks.skb_priority);
3283 memset(&wc->masks.dl_type, 0xff, sizeof wc->masks.dl_type);
3284 if (is_ip_any(flow)) {
3285 wc->masks.nw_frag |= FLOW_NW_FRAG_MASK;
3287 is_icmp = is_icmpv4(flow) || is_icmpv6(flow);
3289 tnl_may_send = tnl_xlate_init(&ctx.base_flow, flow, wc);
3290 if (ctx.xbridge->netflow) {
3291 netflow_mask_wc(flow, wc);
3296 ctx.in_group = false;
3297 ctx.orig_skb_priority = flow->skb_priority;
3300 ctx.use_recirc = false;
3302 if (!xin->ofpacts && !ctx.rule) {
3303 ctx.table_id = rule_dpif_lookup(ctx.xbridge->ofproto, flow,
3304 !xin->skip_wildcards ? wc : NULL,
3305 &rule, ctx.xin->xcache != NULL,
3306 ctx.xin->resubmit_stats);
3307 if (ctx.xin->resubmit_stats) {
3308 rule_dpif_credit_stats(rule, ctx.xin->resubmit_stats);
3310 if (ctx.xin->xcache) {
3311 struct xc_entry *entry;
3313 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_RULE);
3314 entry->u.rule = rule;
3318 xout->fail_open = ctx.rule && rule_dpif_is_fail_open(ctx.rule);
3321 ofpacts = xin->ofpacts;
3322 ofpacts_len = xin->ofpacts_len;
3323 } else if (ctx.rule) {
3324 actions = rule_dpif_get_actions(ctx.rule);
3325 ofpacts = actions->ofpacts;
3326 ofpacts_len = actions->ofpacts_len;
3331 ofpbuf_use_stub(&ctx.stack, ctx.init_stack, sizeof ctx.init_stack);
3332 ofpbuf_use_stub(&ctx.action_set,
3333 ctx.action_set_stub, sizeof ctx.action_set_stub);
3335 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
3336 /* Do this conditionally because the copy is expensive enough that it
3337 * shows up in profiles. */
3341 if (flow->nw_frag & FLOW_NW_FRAG_ANY) {
3342 switch (ctx.xbridge->frag) {
3343 case OFPC_FRAG_NORMAL:
3344 /* We must pretend that transport ports are unavailable. */
3345 flow->tp_src = ctx.base_flow.tp_src = htons(0);
3346 flow->tp_dst = ctx.base_flow.tp_dst = htons(0);
3349 case OFPC_FRAG_DROP:
3352 case OFPC_FRAG_REASM:
3355 case OFPC_FRAG_NX_MATCH:
3356 /* Nothing to do. */
3359 case OFPC_INVALID_TTL_TO_CONTROLLER:
3364 in_port = get_ofp_port(ctx.xbridge, flow->in_port.ofp_port);
3365 if (in_port && in_port->is_tunnel) {
3366 if (ctx.xin->resubmit_stats) {
3367 netdev_vport_inc_rx(in_port->netdev, ctx.xin->resubmit_stats);
3369 bfd_account_rx(in_port->bfd, ctx.xin->resubmit_stats);
3372 if (ctx.xin->xcache) {
3373 struct xc_entry *entry;
3375 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_NETDEV);
3376 entry->u.dev.rx = netdev_ref(in_port->netdev);
3377 entry->u.dev.bfd = bfd_ref(in_port->bfd);
3381 special = process_special(&ctx, flow, in_port, ctx.xin->packet);
3383 ctx.xout->slow |= special;
3385 size_t sample_actions_len;
3387 if (flow->in_port.ofp_port
3388 != vsp_realdev_to_vlandev(ctx.xbridge->ofproto,
3389 flow->in_port.ofp_port,
3391 ctx.base_flow.vlan_tci = 0;
3394 add_sflow_action(&ctx);
3395 add_ipfix_action(&ctx);
3396 sample_actions_len = ofpbuf_size(&ctx.xout->odp_actions);
3398 if (tnl_may_send && (!in_port || may_receive(in_port, &ctx))) {
3399 do_xlate_actions(ofpacts, ofpacts_len, &ctx);
3401 /* We've let OFPP_NORMAL and the learning action look at the
3402 * packet, so drop it now if forwarding is disabled. */
3403 if (in_port && !xport_stp_forward_state(in_port)) {
3404 ofpbuf_set_size(&ctx.xout->odp_actions, sample_actions_len);
3408 if (ofpbuf_size(&ctx.action_set)) {
3409 xlate_action_set(&ctx);
3412 if (ctx.xbridge->has_in_band
3413 && in_band_must_output_to_local_port(flow)
3414 && !actions_output_to_local_port(&ctx)) {
3415 compose_output_action(&ctx, OFPP_LOCAL);
3418 fix_sflow_action(&ctx);
3420 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
3421 add_mirror_actions(&ctx, &orig_flow);
3425 if (nl_attr_oversized(ofpbuf_size(&ctx.xout->odp_actions))) {
3426 /* These datapath actions are too big for a Netlink attribute, so we
3427 * can't hand them to the kernel directly. dpif_execute() can execute
3428 * them one by one with help, so just mark the result as SLOW_ACTION to
3429 * prevent the flow from being installed. */
3430 COVERAGE_INC(xlate_actions_oversize);
3431 ctx.xout->slow |= SLOW_ACTION;
3434 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
3435 if (ctx.xin->resubmit_stats) {
3436 mirror_update_stats(ctx.xbridge->mbridge, xout->mirrors,
3437 ctx.xin->resubmit_stats->n_packets,
3438 ctx.xin->resubmit_stats->n_bytes);
3440 if (ctx.xin->xcache) {
3441 struct xc_entry *entry;
3443 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_MIRROR);
3444 entry->u.mirror.mbridge = mbridge_ref(ctx.xbridge->mbridge);
3445 entry->u.mirror.mirrors = xout->mirrors;
3449 if (ctx.xbridge->netflow) {
3450 /* Only update netflow if we don't have controller flow. We don't
3451 * report NetFlow expiration messages for such facets because they
3452 * are just part of the control logic for the network, not real
3454 if (ofpacts_len == 0
3455 || ofpacts->type != OFPACT_CONTROLLER
3456 || ofpact_next(ofpacts) < ofpact_end(ofpacts, ofpacts_len)) {
3457 if (ctx.xin->resubmit_stats) {
3458 netflow_flow_update(ctx.xbridge->netflow, flow,
3459 xout->nf_output_iface,
3460 ctx.xin->resubmit_stats);
3462 if (ctx.xin->xcache) {
3463 struct xc_entry *entry;
3465 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_NETFLOW);
3466 entry->u.nf.netflow = netflow_ref(ctx.xbridge->netflow);
3467 entry->u.nf.flow = xmemdup(flow, sizeof *flow);
3468 entry->u.nf.iface = xout->nf_output_iface;
3473 ofpbuf_uninit(&ctx.stack);
3474 ofpbuf_uninit(&ctx.action_set);
3476 /* Clear the metadata and register wildcard masks, because we won't
3477 * use non-header fields as part of the cache. */
3478 flow_wildcards_clear_non_packet_fields(wc);
3480 /* ICMPv4 and ICMPv6 have 8-bit "type" and "code" fields. struct flow uses
3481 * the low 8 bits of the 16-bit tp_src and tp_dst members to represent
3482 * these fields. The datapath interface, on the other hand, represents
3483 * them with just 8 bits each. This means that if the high 8 bits of the
3484 * masks for these fields somehow become set, then they will get chopped
3485 * off by a round trip through the datapath, and revalidation will spot
3486 * that as an inconsistency and delete the flow. Avoid the problem here by
3487 * making sure that only the low 8 bits of either field can be unwildcarded
3491 wc->masks.tp_src &= htons(UINT8_MAX);
3492 wc->masks.tp_dst &= htons(UINT8_MAX);
3496 /* Sends 'packet' out 'ofport'.
3497 * May modify 'packet'.
3498 * Returns 0 if successful, otherwise a positive errno value. */
3500 xlate_send_packet(const struct ofport_dpif *ofport, struct ofpbuf *packet)
3502 struct xport *xport;
3503 struct ofpact_output output;
3506 ofpact_init(&output.ofpact, OFPACT_OUTPUT, sizeof output);
3507 /* Use OFPP_NONE as the in_port to avoid special packet processing. */
3508 flow_extract(packet, NULL, &flow);
3509 flow.in_port.ofp_port = OFPP_NONE;
3511 ovs_rwlock_rdlock(&xlate_rwlock);
3512 xport = xport_lookup(ofport);
3514 ovs_rwlock_unlock(&xlate_rwlock);
3517 output.port = xport->ofp_port;
3519 ovs_rwlock_unlock(&xlate_rwlock);
3521 return ofproto_dpif_execute_actions(xport->xbridge->ofproto, &flow, NULL,
3522 &output.ofpact, sizeof output,
3526 struct xlate_cache *
3527 xlate_cache_new(void)
3529 struct xlate_cache *xcache = xmalloc(sizeof *xcache);
3531 ofpbuf_init(&xcache->entries, 512);
3535 static struct xc_entry *
3536 xlate_cache_add_entry(struct xlate_cache *xcache, enum xc_type type)
3538 struct xc_entry *entry;
3540 entry = ofpbuf_put_zeros(&xcache->entries, sizeof *entry);
3547 xlate_cache_netdev(struct xc_entry *entry, const struct dpif_flow_stats *stats)
3549 if (entry->u.dev.tx) {
3550 netdev_vport_inc_tx(entry->u.dev.tx, stats);
3552 if (entry->u.dev.rx) {
3553 netdev_vport_inc_rx(entry->u.dev.rx, stats);
3555 if (entry->u.dev.bfd) {
3556 bfd_account_rx(entry->u.dev.bfd, stats);
3561 xlate_cache_normal(struct ofproto_dpif *ofproto, struct flow *flow, int vlan)
3563 struct xbridge *xbridge;
3564 struct xbundle *xbundle;
3565 struct flow_wildcards wc;
3567 xbridge = xbridge_lookup(ofproto);
3572 xbundle = lookup_input_bundle(xbridge, flow->in_port.ofp_port, false,
3578 update_learning_table(xbridge, flow, &wc, vlan, xbundle);
3581 /* Push stats and perform side effects of flow translation. */
3583 xlate_push_stats(struct xlate_cache *xcache, bool may_learn,
3584 const struct dpif_flow_stats *stats)
3586 struct xc_entry *entry;
3587 struct ofpbuf entries = xcache->entries;
3589 XC_ENTRY_FOR_EACH (entry, entries, xcache) {
3590 switch (entry->type) {
3592 rule_dpif_credit_stats(entry->u.rule, stats);
3595 bond_account(entry->u.bond.bond, entry->u.bond.flow,
3596 entry->u.bond.vid, stats->n_bytes);
3599 xlate_cache_netdev(entry, stats);
3602 netflow_flow_update(entry->u.nf.netflow, entry->u.nf.flow,
3603 entry->u.nf.iface, stats);
3606 mirror_update_stats(entry->u.mirror.mbridge,
3607 entry->u.mirror.mirrors,
3608 stats->n_packets, stats->n_bytes);
3612 struct rule_dpif *rule = entry->u.learn.rule;
3614 /* Reset the modified time for a rule that is equivalent to
3615 * the currently cached rule. If the rule is not the exact
3616 * rule we have cached, update the reference that we have. */
3617 entry->u.learn.rule = ofproto_dpif_refresh_rule(rule);
3621 xlate_cache_normal(entry->u.normal.ofproto, entry->u.normal.flow,
3622 entry->u.normal.vlan);
3624 case XC_FIN_TIMEOUT:
3625 xlate_fin_timeout__(entry->u.fin.rule, stats->tcp_flags,
3626 entry->u.fin.idle, entry->u.fin.hard);
3629 group_dpif_credit_stats(entry->u.group.group, entry->u.group.bucket,
3639 xlate_dev_unref(struct xc_entry *entry)
3641 if (entry->u.dev.tx) {
3642 netdev_close(entry->u.dev.tx);
3644 if (entry->u.dev.rx) {
3645 netdev_close(entry->u.dev.rx);
3647 if (entry->u.dev.bfd) {
3648 bfd_unref(entry->u.dev.bfd);
3653 xlate_cache_clear_netflow(struct netflow *netflow, struct flow *flow)
3655 netflow_expire(netflow, flow);
3656 netflow_flow_clear(netflow, flow);
3657 netflow_unref(netflow);
3662 xlate_cache_clear(struct xlate_cache *xcache)
3664 struct xc_entry *entry;
3665 struct ofpbuf entries;
3671 XC_ENTRY_FOR_EACH (entry, entries, xcache) {
3672 switch (entry->type) {
3674 rule_dpif_unref(entry->u.rule);
3677 free(entry->u.bond.flow);
3678 bond_unref(entry->u.bond.bond);
3681 xlate_dev_unref(entry);
3684 xlate_cache_clear_netflow(entry->u.nf.netflow, entry->u.nf.flow);
3687 mbridge_unref(entry->u.mirror.mbridge);
3690 /* 'u.learn.rule' is the learned rule. */
3691 rule_dpif_unref(entry->u.learn.rule);
3694 free(entry->u.normal.flow);
3696 case XC_FIN_TIMEOUT:
3697 /* 'u.fin.rule' is always already held as a XC_RULE, which
3698 * has already released it's reference above. */
3701 group_dpif_unref(entry->u.group.group);
3708 ofpbuf_clear(&xcache->entries);
3712 xlate_cache_delete(struct xlate_cache *xcache)
3714 xlate_cache_clear(xcache);
3715 ofpbuf_uninit(&xcache->entries);