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_too_many_output);
55 COVERAGE_DEFINE(xlate_actions_mpls_overflow);
57 VLOG_DEFINE_THIS_MODULE(ofproto_dpif_xlate);
59 /* Maximum depth of flow table recursion (due to resubmit actions) in a
60 * flow translation. */
61 #define MAX_RESUBMIT_RECURSION 64
62 #define MAX_INTERNAL_RESUBMITS 1 /* Max resbmits allowed using rules in
65 /* Maximum number of resubmit actions in a flow translation, whether they are
66 * recursive or not. */
67 #define MAX_RESUBMITS (MAX_RESUBMIT_RECURSION * MAX_RESUBMIT_RECURSION)
69 struct ovs_rwlock xlate_rwlock = OVS_RWLOCK_INITIALIZER;
72 struct hmap_node hmap_node; /* Node in global 'xbridges' map. */
73 struct ofproto_dpif *ofproto; /* Key in global 'xbridges' map. */
75 struct list xbundles; /* Owned xbundles. */
76 struct hmap xports; /* Indexed by ofp_port. */
78 char *name; /* Name used in log messages. */
79 struct dpif *dpif; /* Datapath interface. */
80 struct mac_learning *ml; /* Mac learning handle. */
81 struct mbridge *mbridge; /* Mirroring. */
82 struct dpif_sflow *sflow; /* SFlow handle, or null. */
83 struct dpif_ipfix *ipfix; /* Ipfix handle, or null. */
84 struct netflow *netflow; /* Netflow handle, or null. */
85 struct stp *stp; /* STP or null if disabled. */
87 /* Special rules installed by ofproto-dpif. */
88 struct rule_dpif *miss_rule;
89 struct rule_dpif *no_packet_in_rule;
91 enum ofp_config_flags frag; /* Fragmentation handling. */
92 bool has_in_band; /* Bridge has in band control? */
93 bool forward_bpdu; /* Bridge forwards STP BPDUs? */
95 /* True if the datapath supports recirculation. */
98 /* True if the datapath supports variable-length
99 * OVS_USERSPACE_ATTR_USERDATA in OVS_ACTION_ATTR_USERSPACE actions.
100 * False if the datapath supports only 8-byte (or shorter) userdata. */
101 bool variable_length_userdata;
103 /* Number of MPLS label stack entries that the datapath supports
105 size_t max_mpls_depth;
109 struct hmap_node hmap_node; /* In global 'xbundles' map. */
110 struct ofbundle *ofbundle; /* Key in global 'xbundles' map. */
112 struct list list_node; /* In parent 'xbridges' list. */
113 struct xbridge *xbridge; /* Parent xbridge. */
115 struct list xports; /* Contains "struct xport"s. */
117 char *name; /* Name used in log messages. */
118 struct bond *bond; /* Nonnull iff more than one port. */
119 struct lacp *lacp; /* LACP handle or null. */
121 enum port_vlan_mode vlan_mode; /* VLAN mode. */
122 int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */
123 unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1.
124 * NULL if all VLANs are trunked. */
125 bool use_priority_tags; /* Use 802.1p tag for frames in VLAN 0? */
126 bool floodable; /* No port has OFPUTIL_PC_NO_FLOOD set? */
130 struct hmap_node hmap_node; /* Node in global 'xports' map. */
131 struct ofport_dpif *ofport; /* Key in global 'xports map. */
133 struct hmap_node ofp_node; /* Node in parent xbridge 'xports' map. */
134 ofp_port_t ofp_port; /* Key in parent xbridge 'xports' map. */
136 odp_port_t odp_port; /* Datapath port number or ODPP_NONE. */
138 struct list bundle_node; /* In parent xbundle (if it exists). */
139 struct xbundle *xbundle; /* Parent xbundle or null. */
141 struct netdev *netdev; /* 'ofport''s netdev. */
143 struct xbridge *xbridge; /* Parent bridge. */
144 struct xport *peer; /* Patch port peer or null. */
146 enum ofputil_port_config config; /* OpenFlow port configuration. */
147 enum ofputil_port_state state; /* OpenFlow port state. */
148 int stp_port_no; /* STP port number or -1 if not in use. */
150 struct hmap skb_priorities; /* Map of 'skb_priority_to_dscp's. */
152 bool may_enable; /* May be enabled in bonds. */
153 bool is_tunnel; /* Is a tunnel port. */
155 struct cfm *cfm; /* CFM handle or null. */
156 struct bfd *bfd; /* BFD handle or null. */
160 struct xlate_in *xin;
161 struct xlate_out *xout;
163 const struct xbridge *xbridge;
165 /* Flow at the last commit. */
166 struct flow base_flow;
168 /* Tunnel IP destination address as received. This is stored separately
169 * as the base_flow.tunnel is cleared on init to reflect the datapath
170 * behavior. Used to make sure not to send tunneled output to ourselves,
171 * which might lead to an infinite loop. This could happen easily
172 * if a tunnel is marked as 'ip_remote=flow', and the flow does not
173 * actually set the tun_dst field. */
174 ovs_be32 orig_tunnel_ip_dst;
176 /* Stack for the push and pop actions. Each stack element is of type
177 * "union mf_subvalue". */
178 union mf_subvalue init_stack[1024 / sizeof(union mf_subvalue)];
181 /* The rule that we are currently translating, or NULL. */
182 struct rule_dpif *rule;
184 /* Resubmit statistics, via xlate_table_action(). */
185 int recurse; /* Current resubmit nesting depth. */
186 int resubmits; /* Total number of resubmits. */
187 bool in_group; /* Currently translating ofgroup, if true. */
189 uint32_t orig_skb_priority; /* Priority when packet arrived. */
190 uint8_t table_id; /* OpenFlow table ID where flow was found. */
191 uint32_t sflow_n_outputs; /* Number of output ports. */
192 odp_port_t sflow_odp_port; /* Output port for composing sFlow action. */
193 uint16_t user_cookie_offset;/* Used for user_action_cookie fixup. */
194 bool exit; /* No further actions should be processed. */
196 bool use_recirc; /* Should generate recirc? */
197 struct xlate_recirc recirc; /* Information used for generating
198 * recirculation actions */
200 /* OpenFlow 1.1+ action set.
202 * 'action_set' accumulates "struct ofpact"s added by OFPACT_WRITE_ACTIONS.
203 * When translation is otherwise complete, ofpacts_execute_action_set()
204 * converts it to a set of "struct ofpact"s that can be translated into
205 * datapath actions. */
206 struct ofpbuf action_set; /* Action set. */
207 uint64_t action_set_stub[1024 / 8];
210 /* A controller may use OFPP_NONE as the ingress port to indicate that
211 * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for
212 * when an input bundle is needed for validation (e.g., mirroring or
213 * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have
214 * any 'port' structs, so care must be taken when dealing with it. */
215 static struct xbundle ofpp_none_bundle = {
217 .vlan_mode = PORT_VLAN_TRUNK
220 /* Node in 'xport''s 'skb_priorities' map. Used to maintain a map from
221 * 'priority' (the datapath's term for QoS queue) to the dscp bits which all
222 * traffic egressing the 'ofport' with that priority should be marked with. */
223 struct skb_priority_to_dscp {
224 struct hmap_node hmap_node; /* Node in 'ofport_dpif''s 'skb_priorities'. */
225 uint32_t skb_priority; /* Priority of this queue (see struct flow). */
227 uint8_t dscp; /* DSCP bits to mark outgoing traffic with. */
241 /* xlate_cache entries hold enough information to perform the side effects of
242 * xlate_actions() for a rule, without needing to perform rule translation
243 * from scratch. The primary usage of these is to submit statistics to objects
244 * that a flow relates to, although they may be used for other effects as well
245 * (for instance, refreshing hard timeouts for learned flows). */
249 struct rule_dpif *rule;
256 struct netflow *netflow;
261 struct mbridge *mbridge;
262 mirror_mask_t mirrors;
270 struct ofproto_dpif *ofproto;
271 struct ofputil_flow_mod *fm;
272 struct ofpbuf *ofpacts;
275 struct ofproto_dpif *ofproto;
280 struct rule_dpif *rule;
287 #define XC_ENTRY_FOR_EACH(entry, entries, xcache) \
288 entries = xcache->entries; \
289 for (entry = ofpbuf_try_pull(&entries, sizeof *entry); \
291 entry = ofpbuf_try_pull(&entries, sizeof *entry))
294 struct ofpbuf entries;
297 static struct hmap xbridges = HMAP_INITIALIZER(&xbridges);
298 static struct hmap xbundles = HMAP_INITIALIZER(&xbundles);
299 static struct hmap xports = HMAP_INITIALIZER(&xports);
301 static bool may_receive(const struct xport *, struct xlate_ctx *);
302 static void do_xlate_actions(const struct ofpact *, size_t ofpacts_len,
304 static void xlate_actions__(struct xlate_in *, struct xlate_out *)
305 OVS_REQ_RDLOCK(xlate_rwlock);
306 static void xlate_normal(struct xlate_ctx *);
307 static void xlate_report(struct xlate_ctx *, const char *);
308 static void xlate_table_action(struct xlate_ctx *, ofp_port_t in_port,
309 uint8_t table_id, bool may_packet_in,
310 bool honor_table_miss);
311 static bool input_vid_is_valid(uint16_t vid, struct xbundle *, bool warn);
312 static uint16_t input_vid_to_vlan(const struct xbundle *, uint16_t vid);
313 static void output_normal(struct xlate_ctx *, const struct xbundle *,
315 static void compose_output_action(struct xlate_ctx *, ofp_port_t ofp_port);
317 static struct xbridge *xbridge_lookup(const struct ofproto_dpif *);
318 static struct xbundle *xbundle_lookup(const struct ofbundle *);
319 static struct xport *xport_lookup(const struct ofport_dpif *);
320 static struct xport *get_ofp_port(const struct xbridge *, ofp_port_t ofp_port);
321 static struct skb_priority_to_dscp *get_skb_priority(const struct xport *,
322 uint32_t skb_priority);
323 static void clear_skb_priorities(struct xport *);
324 static bool dscp_from_skb_priority(const struct xport *, uint32_t skb_priority,
327 static struct xc_entry *xlate_cache_add_entry(struct xlate_cache *xc,
331 xlate_ofproto_set(struct ofproto_dpif *ofproto, const char *name,
332 struct dpif *dpif, struct rule_dpif *miss_rule,
333 struct rule_dpif *no_packet_in_rule,
334 const struct mac_learning *ml, struct stp *stp,
335 const struct mbridge *mbridge,
336 const struct dpif_sflow *sflow,
337 const struct dpif_ipfix *ipfix,
338 const struct netflow *netflow, enum ofp_config_flags frag,
339 bool forward_bpdu, bool has_in_band,
341 bool variable_length_userdata,
342 size_t max_mpls_depth)
344 struct xbridge *xbridge = xbridge_lookup(ofproto);
347 xbridge = xzalloc(sizeof *xbridge);
348 xbridge->ofproto = ofproto;
350 hmap_insert(&xbridges, &xbridge->hmap_node, hash_pointer(ofproto, 0));
351 hmap_init(&xbridge->xports);
352 list_init(&xbridge->xbundles);
355 if (xbridge->ml != ml) {
356 mac_learning_unref(xbridge->ml);
357 xbridge->ml = mac_learning_ref(ml);
360 if (xbridge->mbridge != mbridge) {
361 mbridge_unref(xbridge->mbridge);
362 xbridge->mbridge = mbridge_ref(mbridge);
365 if (xbridge->sflow != sflow) {
366 dpif_sflow_unref(xbridge->sflow);
367 xbridge->sflow = dpif_sflow_ref(sflow);
370 if (xbridge->ipfix != ipfix) {
371 dpif_ipfix_unref(xbridge->ipfix);
372 xbridge->ipfix = dpif_ipfix_ref(ipfix);
375 if (xbridge->stp != stp) {
376 stp_unref(xbridge->stp);
377 xbridge->stp = stp_ref(stp);
380 if (xbridge->netflow != netflow) {
381 netflow_unref(xbridge->netflow);
382 xbridge->netflow = netflow_ref(netflow);
386 xbridge->name = xstrdup(name);
388 xbridge->dpif = dpif;
389 xbridge->forward_bpdu = forward_bpdu;
390 xbridge->has_in_band = has_in_band;
391 xbridge->frag = frag;
392 xbridge->miss_rule = miss_rule;
393 xbridge->no_packet_in_rule = no_packet_in_rule;
394 xbridge->enable_recirc = enable_recirc;
395 xbridge->variable_length_userdata = variable_length_userdata;
396 xbridge->max_mpls_depth = max_mpls_depth;
400 xlate_remove_ofproto(struct ofproto_dpif *ofproto)
402 struct xbridge *xbridge = xbridge_lookup(ofproto);
403 struct xbundle *xbundle, *next_xbundle;
404 struct xport *xport, *next_xport;
410 HMAP_FOR_EACH_SAFE (xport, next_xport, ofp_node, &xbridge->xports) {
411 xlate_ofport_remove(xport->ofport);
414 LIST_FOR_EACH_SAFE (xbundle, next_xbundle, list_node, &xbridge->xbundles) {
415 xlate_bundle_remove(xbundle->ofbundle);
418 hmap_remove(&xbridges, &xbridge->hmap_node);
419 mac_learning_unref(xbridge->ml);
420 mbridge_unref(xbridge->mbridge);
421 dpif_sflow_unref(xbridge->sflow);
422 dpif_ipfix_unref(xbridge->ipfix);
423 stp_unref(xbridge->stp);
424 hmap_destroy(&xbridge->xports);
430 xlate_bundle_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
431 const char *name, enum port_vlan_mode vlan_mode, int vlan,
432 unsigned long *trunks, bool use_priority_tags,
433 const struct bond *bond, const struct lacp *lacp,
436 struct xbundle *xbundle = xbundle_lookup(ofbundle);
439 xbundle = xzalloc(sizeof *xbundle);
440 xbundle->ofbundle = ofbundle;
441 xbundle->xbridge = xbridge_lookup(ofproto);
443 hmap_insert(&xbundles, &xbundle->hmap_node, hash_pointer(ofbundle, 0));
444 list_insert(&xbundle->xbridge->xbundles, &xbundle->list_node);
445 list_init(&xbundle->xports);
448 ovs_assert(xbundle->xbridge);
451 xbundle->name = xstrdup(name);
453 xbundle->vlan_mode = vlan_mode;
454 xbundle->vlan = vlan;
455 xbundle->trunks = trunks;
456 xbundle->use_priority_tags = use_priority_tags;
457 xbundle->floodable = floodable;
459 if (xbundle->bond != bond) {
460 bond_unref(xbundle->bond);
461 xbundle->bond = bond_ref(bond);
464 if (xbundle->lacp != lacp) {
465 lacp_unref(xbundle->lacp);
466 xbundle->lacp = lacp_ref(lacp);
471 xlate_bundle_remove(struct ofbundle *ofbundle)
473 struct xbundle *xbundle = xbundle_lookup(ofbundle);
474 struct xport *xport, *next;
480 LIST_FOR_EACH_SAFE (xport, next, bundle_node, &xbundle->xports) {
481 list_remove(&xport->bundle_node);
482 xport->xbundle = NULL;
485 hmap_remove(&xbundles, &xbundle->hmap_node);
486 list_remove(&xbundle->list_node);
487 bond_unref(xbundle->bond);
488 lacp_unref(xbundle->lacp);
494 xlate_ofport_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
495 struct ofport_dpif *ofport, ofp_port_t ofp_port,
496 odp_port_t odp_port, const struct netdev *netdev,
497 const struct cfm *cfm, const struct bfd *bfd,
498 struct ofport_dpif *peer, int stp_port_no,
499 const struct ofproto_port_queue *qdscp_list, size_t n_qdscp,
500 enum ofputil_port_config config,
501 enum ofputil_port_state state, bool is_tunnel,
504 struct xport *xport = xport_lookup(ofport);
508 xport = xzalloc(sizeof *xport);
509 xport->ofport = ofport;
510 xport->xbridge = xbridge_lookup(ofproto);
511 xport->ofp_port = ofp_port;
513 hmap_init(&xport->skb_priorities);
514 hmap_insert(&xports, &xport->hmap_node, hash_pointer(ofport, 0));
515 hmap_insert(&xport->xbridge->xports, &xport->ofp_node,
516 hash_ofp_port(xport->ofp_port));
519 ovs_assert(xport->ofp_port == ofp_port);
521 xport->config = config;
522 xport->state = state;
523 xport->stp_port_no = stp_port_no;
524 xport->is_tunnel = is_tunnel;
525 xport->may_enable = may_enable;
526 xport->odp_port = odp_port;
528 if (xport->netdev != netdev) {
529 netdev_close(xport->netdev);
530 xport->netdev = netdev_ref(netdev);
533 if (xport->cfm != cfm) {
534 cfm_unref(xport->cfm);
535 xport->cfm = cfm_ref(cfm);
538 if (xport->bfd != bfd) {
539 bfd_unref(xport->bfd);
540 xport->bfd = bfd_ref(bfd);
544 xport->peer->peer = NULL;
546 xport->peer = xport_lookup(peer);
548 xport->peer->peer = xport;
551 if (xport->xbundle) {
552 list_remove(&xport->bundle_node);
554 xport->xbundle = xbundle_lookup(ofbundle);
555 if (xport->xbundle) {
556 list_insert(&xport->xbundle->xports, &xport->bundle_node);
559 clear_skb_priorities(xport);
560 for (i = 0; i < n_qdscp; i++) {
561 struct skb_priority_to_dscp *pdscp;
562 uint32_t skb_priority;
564 if (dpif_queue_to_priority(xport->xbridge->dpif, qdscp_list[i].queue,
569 pdscp = xmalloc(sizeof *pdscp);
570 pdscp->skb_priority = skb_priority;
571 pdscp->dscp = (qdscp_list[i].dscp << 2) & IP_DSCP_MASK;
572 hmap_insert(&xport->skb_priorities, &pdscp->hmap_node,
573 hash_int(pdscp->skb_priority, 0));
578 xlate_ofport_remove(struct ofport_dpif *ofport)
580 struct xport *xport = xport_lookup(ofport);
587 xport->peer->peer = NULL;
591 if (xport->xbundle) {
592 list_remove(&xport->bundle_node);
595 clear_skb_priorities(xport);
596 hmap_destroy(&xport->skb_priorities);
598 hmap_remove(&xports, &xport->hmap_node);
599 hmap_remove(&xport->xbridge->xports, &xport->ofp_node);
601 netdev_close(xport->netdev);
602 cfm_unref(xport->cfm);
603 bfd_unref(xport->bfd);
607 /* Given a datpath, packet, and flow metadata ('backer', 'packet', and 'key'
608 * respectively), populates 'flow' with the result of odp_flow_key_to_flow().
609 * Optionally populates 'ofproto' with the ofproto_dpif, 'odp_in_port' with
610 * the datapath in_port, that 'packet' ingressed, and 'ipfix', 'sflow', and
611 * 'netflow' with the appropriate handles for those protocols if they're
612 * enabled. Caller is responsible for unrefing them.
614 * If 'ofproto' is nonnull, requires 'flow''s in_port to exist. Otherwise sets
615 * 'flow''s in_port to OFPP_NONE.
617 * This function does post-processing on data returned from
618 * odp_flow_key_to_flow() to help make VLAN splinters transparent to the rest
619 * of the upcall processing logic. In particular, if the extracted in_port is
620 * a VLAN splinter port, it replaces flow->in_port by the "real" port, sets
621 * flow->vlan_tci correctly for the VLAN of the VLAN splinter port, and pushes
622 * a VLAN header onto 'packet' (if it is nonnull).
624 * Similarly, this function also includes some logic to help with tunnels. It
625 * may modify 'flow' as necessary to make the tunneling implementation
626 * transparent to the upcall processing logic.
628 * Returns 0 if successful, ENODEV if the parsed flow has no associated ofport,
629 * or some other positive errno if there are other problems. */
631 xlate_receive(const struct dpif_backer *backer, struct ofpbuf *packet,
632 const struct nlattr *key, size_t key_len, struct flow *flow,
633 struct ofproto_dpif **ofproto, struct dpif_ipfix **ipfix,
634 struct dpif_sflow **sflow, struct netflow **netflow,
635 odp_port_t *odp_in_port)
637 const struct xport *xport;
640 ovs_rwlock_rdlock(&xlate_rwlock);
641 if (odp_flow_key_to_flow(key, key_len, flow) == ODP_FIT_ERROR) {
647 *odp_in_port = flow->in_port.odp_port;
650 xport = xport_lookup(tnl_port_should_receive(flow)
651 ? tnl_port_receive(flow)
652 : odp_port_to_ofport(backer, flow->in_port.odp_port));
654 flow->in_port.ofp_port = xport ? xport->ofp_port : OFPP_NONE;
659 if (vsp_adjust_flow(xport->xbridge->ofproto, flow)) {
661 /* Make the packet resemble the flow, so that it gets sent to
662 * an OpenFlow controller properly, so that it looks correct
663 * for sFlow, and so that flow_extract() will get the correct
664 * vlan_tci if it is called on 'packet'. */
665 eth_push_vlan(packet, htons(ETH_TYPE_VLAN), flow->vlan_tci);
671 *ofproto = xport->xbridge->ofproto;
675 *ipfix = dpif_ipfix_ref(xport->xbridge->ipfix);
679 *sflow = dpif_sflow_ref(xport->xbridge->sflow);
683 *netflow = netflow_ref(xport->xbridge->netflow);
687 ovs_rwlock_unlock(&xlate_rwlock);
691 static struct xbridge *
692 xbridge_lookup(const struct ofproto_dpif *ofproto)
694 struct xbridge *xbridge;
700 HMAP_FOR_EACH_IN_BUCKET (xbridge, hmap_node, hash_pointer(ofproto, 0),
702 if (xbridge->ofproto == ofproto) {
709 static struct xbundle *
710 xbundle_lookup(const struct ofbundle *ofbundle)
712 struct xbundle *xbundle;
718 HMAP_FOR_EACH_IN_BUCKET (xbundle, hmap_node, hash_pointer(ofbundle, 0),
720 if (xbundle->ofbundle == ofbundle) {
727 static struct xport *
728 xport_lookup(const struct ofport_dpif *ofport)
736 HMAP_FOR_EACH_IN_BUCKET (xport, hmap_node, hash_pointer(ofport, 0),
738 if (xport->ofport == ofport) {
745 static struct stp_port *
746 xport_get_stp_port(const struct xport *xport)
748 return xport->xbridge->stp && xport->stp_port_no != -1
749 ? stp_get_port(xport->xbridge->stp, xport->stp_port_no)
754 xport_stp_learn_state(const struct xport *xport)
756 struct stp_port *sp = xport_get_stp_port(xport);
757 return stp_learn_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
761 xport_stp_forward_state(const struct xport *xport)
763 struct stp_port *sp = xport_get_stp_port(xport);
764 return stp_forward_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
768 xport_stp_should_forward_bpdu(const struct xport *xport)
770 struct stp_port *sp = xport_get_stp_port(xport);
771 return stp_should_forward_bpdu(sp ? stp_port_get_state(sp) : STP_DISABLED);
774 /* Returns true if STP should process 'flow'. Sets fields in 'wc' that
775 * were used to make the determination.*/
777 stp_should_process_flow(const struct flow *flow, struct flow_wildcards *wc)
779 /* is_stp() also checks dl_type, but dl_type is always set in 'wc'. */
780 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
785 stp_process_packet(const struct xport *xport, const struct ofpbuf *packet)
787 struct stp_port *sp = xport_get_stp_port(xport);
788 struct ofpbuf payload = *packet;
789 struct eth_header *eth = ofpbuf_data(&payload);
791 /* Sink packets on ports that have STP disabled when the bridge has
793 if (!sp || stp_port_get_state(sp) == STP_DISABLED) {
797 /* Trim off padding on payload. */
798 if (ofpbuf_size(&payload) > ntohs(eth->eth_type) + ETH_HEADER_LEN) {
799 ofpbuf_set_size(&payload, ntohs(eth->eth_type) + ETH_HEADER_LEN);
802 if (ofpbuf_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) {
803 stp_received_bpdu(sp, ofpbuf_data(&payload), ofpbuf_size(&payload));
807 static struct xport *
808 get_ofp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
812 HMAP_FOR_EACH_IN_BUCKET (xport, ofp_node, hash_ofp_port(ofp_port),
814 if (xport->ofp_port == ofp_port) {
822 ofp_port_to_odp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
824 const struct xport *xport = get_ofp_port(xbridge, ofp_port);
825 return xport ? xport->odp_port : ODPP_NONE;
829 odp_port_is_alive(const struct xlate_ctx *ctx, ofp_port_t ofp_port)
833 xport = get_ofp_port(ctx->xbridge, ofp_port);
834 if (!xport || xport->config & OFPUTIL_PC_PORT_DOWN ||
835 xport->state & OFPUTIL_PS_LINK_DOWN) {
842 static const struct ofputil_bucket *
843 group_first_live_bucket(const struct xlate_ctx *, const struct group_dpif *,
847 group_is_alive(const struct xlate_ctx *ctx, uint32_t group_id, int depth)
849 struct group_dpif *group;
852 hit = group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group);
857 hit = group_first_live_bucket(ctx, group, depth) != NULL;
859 group_dpif_release(group);
863 #define MAX_LIVENESS_RECURSION 128 /* Arbitrary limit */
866 bucket_is_alive(const struct xlate_ctx *ctx,
867 const struct ofputil_bucket *bucket, int depth)
869 if (depth >= MAX_LIVENESS_RECURSION) {
870 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
872 VLOG_WARN_RL(&rl, "bucket chaining exceeded %d links",
873 MAX_LIVENESS_RECURSION);
877 return !ofputil_bucket_has_liveness(bucket) ||
878 (bucket->watch_port != OFPP_ANY &&
879 odp_port_is_alive(ctx, bucket->watch_port)) ||
880 (bucket->watch_group != OFPG_ANY &&
881 group_is_alive(ctx, bucket->watch_group, depth + 1));
884 static const struct ofputil_bucket *
885 group_first_live_bucket(const struct xlate_ctx *ctx,
886 const struct group_dpif *group, int depth)
888 struct ofputil_bucket *bucket;
889 const struct list *buckets;
891 group_dpif_get_buckets(group, &buckets);
892 LIST_FOR_EACH (bucket, list_node, buckets) {
893 if (bucket_is_alive(ctx, bucket, depth)) {
901 static const struct ofputil_bucket *
902 group_best_live_bucket(const struct xlate_ctx *ctx,
903 const struct group_dpif *group,
906 const struct ofputil_bucket *best_bucket = NULL;
907 uint32_t best_score = 0;
910 const struct ofputil_bucket *bucket;
911 const struct list *buckets;
913 group_dpif_get_buckets(group, &buckets);
914 LIST_FOR_EACH (bucket, list_node, buckets) {
915 if (bucket_is_alive(ctx, bucket, 0)) {
916 uint32_t score = (hash_int(i, basis) & 0xffff) * bucket->weight;
917 if (score >= best_score) {
918 best_bucket = bucket;
929 xbundle_trunks_vlan(const struct xbundle *bundle, uint16_t vlan)
931 return (bundle->vlan_mode != PORT_VLAN_ACCESS
932 && (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan)));
936 xbundle_includes_vlan(const struct xbundle *xbundle, uint16_t vlan)
938 return vlan == xbundle->vlan || xbundle_trunks_vlan(xbundle, vlan);
942 xbundle_mirror_out(const struct xbridge *xbridge, struct xbundle *xbundle)
944 return xbundle != &ofpp_none_bundle
945 ? mirror_bundle_out(xbridge->mbridge, xbundle->ofbundle)
950 xbundle_mirror_src(const struct xbridge *xbridge, struct xbundle *xbundle)
952 return xbundle != &ofpp_none_bundle
953 ? mirror_bundle_src(xbridge->mbridge, xbundle->ofbundle)
958 xbundle_mirror_dst(const struct xbridge *xbridge, struct xbundle *xbundle)
960 return xbundle != &ofpp_none_bundle
961 ? mirror_bundle_dst(xbridge->mbridge, xbundle->ofbundle)
965 static struct xbundle *
966 lookup_input_bundle(const struct xbridge *xbridge, ofp_port_t in_port,
967 bool warn, struct xport **in_xportp)
971 /* Find the port and bundle for the received packet. */
972 xport = get_ofp_port(xbridge, in_port);
976 if (xport && xport->xbundle) {
977 return xport->xbundle;
980 /* Special-case OFPP_NONE (OF1.0) and OFPP_CONTROLLER (OF1.1+),
981 * which a controller may use as the ingress port for traffic that
983 if (in_port == OFPP_CONTROLLER || in_port == OFPP_NONE) {
984 return &ofpp_none_bundle;
987 /* Odd. A few possible reasons here:
989 * - We deleted a port but there are still a few packets queued up
992 * - Someone externally added a port (e.g. "ovs-dpctl add-if") that
993 * we don't know about.
995 * - The ofproto client didn't configure the port as part of a bundle.
996 * This is particularly likely to happen if a packet was received on the
997 * port after it was created, but before the client had a chance to
998 * configure its bundle.
1001 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1003 VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown "
1004 "port %"PRIu16, xbridge->name, in_port);
1010 add_mirror_actions(struct xlate_ctx *ctx, const struct flow *orig_flow)
1012 const struct xbridge *xbridge = ctx->xbridge;
1013 mirror_mask_t mirrors;
1014 struct xbundle *in_xbundle;
1018 mirrors = ctx->xout->mirrors;
1019 ctx->xout->mirrors = 0;
1021 in_xbundle = lookup_input_bundle(xbridge, orig_flow->in_port.ofp_port,
1022 ctx->xin->packet != NULL, NULL);
1026 mirrors |= xbundle_mirror_src(xbridge, in_xbundle);
1028 /* Drop frames on bundles reserved for mirroring. */
1029 if (xbundle_mirror_out(xbridge, in_xbundle)) {
1030 if (ctx->xin->packet != NULL) {
1031 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1032 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
1033 "%s, which is reserved exclusively for mirroring",
1034 ctx->xbridge->name, in_xbundle->name);
1036 ofpbuf_clear(&ctx->xout->odp_actions);
1041 vid = vlan_tci_to_vid(orig_flow->vlan_tci);
1042 if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) {
1045 vlan = input_vid_to_vlan(in_xbundle, vid);
1051 /* Restore the original packet before adding the mirror actions. */
1052 ctx->xin->flow = *orig_flow;
1055 mirror_mask_t dup_mirrors;
1056 struct ofbundle *out;
1057 unsigned long *vlans;
1062 has_mirror = mirror_get(xbridge->mbridge, raw_ctz(mirrors),
1063 &vlans, &dup_mirrors, &out, &out_vlan);
1064 ovs_assert(has_mirror);
1067 ctx->xout->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK);
1069 vlan_mirrored = !vlans || bitmap_is_set(vlans, vlan);
1072 if (!vlan_mirrored) {
1073 mirrors = zero_rightmost_1bit(mirrors);
1077 mirrors &= ~dup_mirrors;
1078 ctx->xout->mirrors |= dup_mirrors;
1080 struct xbundle *out_xbundle = xbundle_lookup(out);
1082 output_normal(ctx, out_xbundle, vlan);
1084 } else if (vlan != out_vlan
1085 && !eth_addr_is_reserved(orig_flow->dl_dst)) {
1086 struct xbundle *xbundle;
1088 LIST_FOR_EACH (xbundle, list_node, &xbridge->xbundles) {
1089 if (xbundle_includes_vlan(xbundle, out_vlan)
1090 && !xbundle_mirror_out(xbridge, xbundle)) {
1091 output_normal(ctx, xbundle, out_vlan);
1098 /* Given 'vid', the VID obtained from the 802.1Q header that was received as
1099 * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle',
1100 * the bundle on which the packet was received, returns the VLAN to which the
1103 * Both 'vid' and the return value are in the range 0...4095. */
1105 input_vid_to_vlan(const struct xbundle *in_xbundle, uint16_t vid)
1107 switch (in_xbundle->vlan_mode) {
1108 case PORT_VLAN_ACCESS:
1109 return in_xbundle->vlan;
1112 case PORT_VLAN_TRUNK:
1115 case PORT_VLAN_NATIVE_UNTAGGED:
1116 case PORT_VLAN_NATIVE_TAGGED:
1117 return vid ? vid : in_xbundle->vlan;
1124 /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'.
1125 * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs
1128 * 'vid' should be the VID obtained from the 802.1Q header that was received as
1129 * part of a packet (specify 0 if there was no 802.1Q header), in the range
1132 input_vid_is_valid(uint16_t vid, struct xbundle *in_xbundle, bool warn)
1134 /* Allow any VID on the OFPP_NONE port. */
1135 if (in_xbundle == &ofpp_none_bundle) {
1139 switch (in_xbundle->vlan_mode) {
1140 case PORT_VLAN_ACCESS:
1143 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1144 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" tagged "
1145 "packet received on port %s configured as VLAN "
1146 "%"PRIu16" access port", vid, in_xbundle->name,
1153 case PORT_VLAN_NATIVE_UNTAGGED:
1154 case PORT_VLAN_NATIVE_TAGGED:
1156 /* Port must always carry its native VLAN. */
1160 case PORT_VLAN_TRUNK:
1161 if (!xbundle_includes_vlan(in_xbundle, vid)) {
1163 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1164 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" packet "
1165 "received on port %s not configured for trunking "
1166 "VLAN %"PRIu16, vid, in_xbundle->name, vid);
1178 /* Given 'vlan', the VLAN that a packet belongs to, and
1179 * 'out_xbundle', a bundle on which the packet is to be output, returns the VID
1180 * that should be included in the 802.1Q header. (If the return value is 0,
1181 * then the 802.1Q header should only be included in the packet if there is a
1184 * Both 'vlan' and the return value are in the range 0...4095. */
1186 output_vlan_to_vid(const struct xbundle *out_xbundle, uint16_t vlan)
1188 switch (out_xbundle->vlan_mode) {
1189 case PORT_VLAN_ACCESS:
1192 case PORT_VLAN_TRUNK:
1193 case PORT_VLAN_NATIVE_TAGGED:
1196 case PORT_VLAN_NATIVE_UNTAGGED:
1197 return vlan == out_xbundle->vlan ? 0 : vlan;
1205 output_normal(struct xlate_ctx *ctx, const struct xbundle *out_xbundle,
1208 ovs_be16 *flow_tci = &ctx->xin->flow.vlan_tci;
1210 ovs_be16 tci, old_tci;
1211 struct xport *xport;
1213 vid = output_vlan_to_vid(out_xbundle, vlan);
1214 if (list_is_empty(&out_xbundle->xports)) {
1215 /* Partially configured bundle with no slaves. Drop the packet. */
1217 } else if (!out_xbundle->bond) {
1218 ctx->use_recirc = false;
1219 xport = CONTAINER_OF(list_front(&out_xbundle->xports), struct xport,
1222 struct ofport_dpif *ofport;
1223 struct xlate_recirc *xr = &ctx->recirc;
1224 struct flow_wildcards *wc = &ctx->xout->wc;
1226 if (ctx->xbridge->enable_recirc) {
1227 ctx->use_recirc = bond_may_recirc(
1228 out_xbundle->bond, &xr->recirc_id, &xr->hash_basis);
1230 if (ctx->use_recirc) {
1231 /* Only TCP mode uses recirculation. */
1232 xr->hash_alg = OVS_HASH_ALG_L4;
1233 bond_update_post_recirc_rules(out_xbundle->bond, false);
1235 /* Recirculation does not require unmasking hash fields. */
1240 ofport = bond_choose_output_slave(out_xbundle->bond,
1241 &ctx->xin->flow, wc, vid);
1242 xport = xport_lookup(ofport);
1245 /* No slaves enabled, so drop packet. */
1249 /* If ctx->xout->use_recirc is set, the main thread will handle stats
1250 * accounting for this bond. */
1251 if (!ctx->use_recirc) {
1252 if (ctx->xin->resubmit_stats) {
1253 bond_account(out_xbundle->bond, &ctx->xin->flow, vid,
1254 ctx->xin->resubmit_stats->n_bytes);
1256 if (ctx->xin->xcache) {
1257 struct xc_entry *entry;
1260 flow = &ctx->xin->flow;
1261 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_BOND);
1262 entry->u.bond.bond = bond_ref(out_xbundle->bond);
1263 entry->u.bond.flow = xmemdup(flow, sizeof *flow);
1264 entry->u.bond.vid = vid;
1269 old_tci = *flow_tci;
1271 if (tci || out_xbundle->use_priority_tags) {
1272 tci |= *flow_tci & htons(VLAN_PCP_MASK);
1274 tci |= htons(VLAN_CFI);
1279 compose_output_action(ctx, xport->ofp_port);
1280 *flow_tci = old_tci;
1283 /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after
1284 * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to
1285 * indicate this; newer upstream kernels use gratuitous ARP requests. */
1287 is_gratuitous_arp(const struct flow *flow, struct flow_wildcards *wc)
1289 if (flow->dl_type != htons(ETH_TYPE_ARP)) {
1293 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1294 if (!eth_addr_is_broadcast(flow->dl_dst)) {
1298 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
1299 if (flow->nw_proto == ARP_OP_REPLY) {
1301 } else if (flow->nw_proto == ARP_OP_REQUEST) {
1302 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
1303 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
1305 return flow->nw_src == flow->nw_dst;
1311 /* Checks whether a MAC learning update is necessary for MAC learning table
1312 * 'ml' given that a packet matching 'flow' was received on 'in_xbundle' in
1315 * Most packets processed through the MAC learning table do not actually
1316 * change it in any way. This function requires only a read lock on the MAC
1317 * learning table, so it is much cheaper in this common case.
1319 * Keep the code here synchronized with that in update_learning_table__()
1322 is_mac_learning_update_needed(const struct mac_learning *ml,
1323 const struct flow *flow,
1324 struct flow_wildcards *wc,
1325 int vlan, struct xbundle *in_xbundle)
1326 OVS_REQ_RDLOCK(ml->rwlock)
1328 struct mac_entry *mac;
1330 if (!mac_learning_may_learn(ml, flow->dl_src, vlan)) {
1334 mac = mac_learning_lookup(ml, flow->dl_src, vlan);
1335 if (!mac || mac_entry_age(ml, mac)) {
1339 if (is_gratuitous_arp(flow, wc)) {
1340 /* We don't want to learn from gratuitous ARP packets that are
1341 * reflected back over bond slaves so we lock the learning table. */
1342 if (!in_xbundle->bond) {
1344 } else if (mac_entry_is_grat_arp_locked(mac)) {
1349 return mac->port.p != in_xbundle->ofbundle;
1353 /* Updates MAC learning table 'ml' given that a packet matching 'flow' was
1354 * received on 'in_xbundle' in 'vlan'.
1356 * This code repeats all the checks in is_mac_learning_update_needed() because
1357 * the lock was released between there and here and thus the MAC learning state
1358 * could have changed.
1360 * Keep the code here synchronized with that in is_mac_learning_update_needed()
1363 update_learning_table__(const struct xbridge *xbridge,
1364 const struct flow *flow, struct flow_wildcards *wc,
1365 int vlan, struct xbundle *in_xbundle)
1366 OVS_REQ_WRLOCK(xbridge->ml->rwlock)
1368 struct mac_entry *mac;
1370 if (!mac_learning_may_learn(xbridge->ml, flow->dl_src, vlan)) {
1374 mac = mac_learning_insert(xbridge->ml, flow->dl_src, vlan);
1375 if (is_gratuitous_arp(flow, wc)) {
1376 /* We don't want to learn from gratuitous ARP packets that are
1377 * reflected back over bond slaves so we lock the learning table. */
1378 if (!in_xbundle->bond) {
1379 mac_entry_set_grat_arp_lock(mac);
1380 } else if (mac_entry_is_grat_arp_locked(mac)) {
1385 if (mac->port.p != in_xbundle->ofbundle) {
1386 /* The log messages here could actually be useful in debugging,
1387 * so keep the rate limit relatively high. */
1388 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
1390 VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
1391 "on port %s in VLAN %d",
1392 xbridge->name, ETH_ADDR_ARGS(flow->dl_src),
1393 in_xbundle->name, vlan);
1395 mac->port.p = in_xbundle->ofbundle;
1396 mac_learning_changed(xbridge->ml);
1401 update_learning_table(const struct xbridge *xbridge,
1402 const struct flow *flow, struct flow_wildcards *wc,
1403 int vlan, struct xbundle *in_xbundle)
1407 /* Don't learn the OFPP_NONE port. */
1408 if (in_xbundle == &ofpp_none_bundle) {
1412 /* First try the common case: no change to MAC learning table. */
1413 ovs_rwlock_rdlock(&xbridge->ml->rwlock);
1414 need_update = is_mac_learning_update_needed(xbridge->ml, flow, wc, vlan,
1416 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1419 /* Slow path: MAC learning table might need an update. */
1420 ovs_rwlock_wrlock(&xbridge->ml->rwlock);
1421 update_learning_table__(xbridge, flow, wc, vlan, in_xbundle);
1422 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1426 /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or
1427 * dropped. Returns true if they may be forwarded, false if they should be
1430 * 'in_port' must be the xport that corresponds to flow->in_port.
1431 * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull).
1433 * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as
1434 * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as
1435 * checked by input_vid_is_valid().
1437 * May also add tags to '*tags', although the current implementation only does
1438 * so in one special case.
1441 is_admissible(struct xlate_ctx *ctx, struct xport *in_port,
1444 struct xbundle *in_xbundle = in_port->xbundle;
1445 const struct xbridge *xbridge = ctx->xbridge;
1446 struct flow *flow = &ctx->xin->flow;
1448 /* Drop frames for reserved multicast addresses
1449 * only if forward_bpdu option is absent. */
1450 if (!xbridge->forward_bpdu && eth_addr_is_reserved(flow->dl_dst)) {
1451 xlate_report(ctx, "packet has reserved destination MAC, dropping");
1455 if (in_xbundle->bond) {
1456 struct mac_entry *mac;
1458 switch (bond_check_admissibility(in_xbundle->bond, in_port->ofport,
1464 xlate_report(ctx, "bonding refused admissibility, dropping");
1467 case BV_DROP_IF_MOVED:
1468 ovs_rwlock_rdlock(&xbridge->ml->rwlock);
1469 mac = mac_learning_lookup(xbridge->ml, flow->dl_src, vlan);
1470 if (mac && mac->port.p != in_xbundle->ofbundle &&
1471 (!is_gratuitous_arp(flow, &ctx->xout->wc)
1472 || mac_entry_is_grat_arp_locked(mac))) {
1473 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1474 xlate_report(ctx, "SLB bond thinks this packet looped back, "
1478 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1487 xlate_normal(struct xlate_ctx *ctx)
1489 struct flow_wildcards *wc = &ctx->xout->wc;
1490 struct flow *flow = &ctx->xin->flow;
1491 struct xbundle *in_xbundle;
1492 struct xport *in_port;
1493 struct mac_entry *mac;
1498 ctx->xout->has_normal = true;
1500 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
1501 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1502 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
1504 in_xbundle = lookup_input_bundle(ctx->xbridge, flow->in_port.ofp_port,
1505 ctx->xin->packet != NULL, &in_port);
1507 xlate_report(ctx, "no input bundle, dropping");
1511 /* Drop malformed frames. */
1512 if (flow->dl_type == htons(ETH_TYPE_VLAN) &&
1513 !(flow->vlan_tci & htons(VLAN_CFI))) {
1514 if (ctx->xin->packet != NULL) {
1515 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1516 VLOG_WARN_RL(&rl, "bridge %s: dropping packet with partial "
1517 "VLAN tag received on port %s",
1518 ctx->xbridge->name, in_xbundle->name);
1520 xlate_report(ctx, "partial VLAN tag, dropping");
1524 /* Drop frames on bundles reserved for mirroring. */
1525 if (xbundle_mirror_out(ctx->xbridge, in_xbundle)) {
1526 if (ctx->xin->packet != NULL) {
1527 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1528 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
1529 "%s, which is reserved exclusively for mirroring",
1530 ctx->xbridge->name, in_xbundle->name);
1532 xlate_report(ctx, "input port is mirror output port, dropping");
1537 vid = vlan_tci_to_vid(flow->vlan_tci);
1538 if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) {
1539 xlate_report(ctx, "disallowed VLAN VID for this input port, dropping");
1542 vlan = input_vid_to_vlan(in_xbundle, vid);
1544 /* Check other admissibility requirements. */
1545 if (in_port && !is_admissible(ctx, in_port, vlan)) {
1549 /* Learn source MAC. */
1550 if (ctx->xin->may_learn) {
1551 update_learning_table(ctx->xbridge, flow, wc, vlan, in_xbundle);
1553 if (ctx->xin->xcache) {
1554 struct xc_entry *entry;
1556 /* Save enough info to update mac learning table later. */
1557 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NORMAL);
1558 entry->u.normal.ofproto = ctx->xbridge->ofproto;
1559 entry->u.normal.flow = xmemdup(flow, sizeof *flow);
1560 entry->u.normal.vlan = vlan;
1563 /* Determine output bundle. */
1564 ovs_rwlock_rdlock(&ctx->xbridge->ml->rwlock);
1565 mac = mac_learning_lookup(ctx->xbridge->ml, flow->dl_dst, vlan);
1566 mac_port = mac ? mac->port.p : NULL;
1567 ovs_rwlock_unlock(&ctx->xbridge->ml->rwlock);
1570 struct xbundle *mac_xbundle = xbundle_lookup(mac_port);
1571 if (mac_xbundle && mac_xbundle != in_xbundle) {
1572 xlate_report(ctx, "forwarding to learned port");
1573 output_normal(ctx, mac_xbundle, vlan);
1574 } else if (!mac_xbundle) {
1575 xlate_report(ctx, "learned port is unknown, dropping");
1577 xlate_report(ctx, "learned port is input port, dropping");
1580 struct xbundle *xbundle;
1582 xlate_report(ctx, "no learned MAC for destination, flooding");
1583 LIST_FOR_EACH (xbundle, list_node, &ctx->xbridge->xbundles) {
1584 if (xbundle != in_xbundle
1585 && xbundle_includes_vlan(xbundle, vlan)
1586 && xbundle->floodable
1587 && !xbundle_mirror_out(ctx->xbridge, xbundle)) {
1588 output_normal(ctx, xbundle, vlan);
1591 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
1595 /* Compose SAMPLE action for sFlow or IPFIX. The given probability is
1596 * the number of packets out of UINT32_MAX to sample. The given
1597 * cookie is passed back in the callback for each sampled packet.
1600 compose_sample_action(const struct xbridge *xbridge,
1601 struct ofpbuf *odp_actions,
1602 const struct flow *flow,
1603 const uint32_t probability,
1604 const union user_action_cookie *cookie,
1605 const size_t cookie_size)
1607 size_t sample_offset, actions_offset;
1608 odp_port_t odp_port;
1612 sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE);
1614 nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability);
1616 actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS);
1618 odp_port = ofp_port_to_odp_port(xbridge, flow->in_port.ofp_port);
1619 pid = dpif_port_get_pid(xbridge->dpif, odp_port,
1620 flow_hash_5tuple(flow, 0));
1621 cookie_offset = odp_put_userspace_action(pid, cookie, cookie_size,
1624 nl_msg_end_nested(odp_actions, actions_offset);
1625 nl_msg_end_nested(odp_actions, sample_offset);
1626 return cookie_offset;
1630 compose_sflow_cookie(const struct xbridge *xbridge, ovs_be16 vlan_tci,
1631 odp_port_t odp_port, unsigned int n_outputs,
1632 union user_action_cookie *cookie)
1636 cookie->type = USER_ACTION_COOKIE_SFLOW;
1637 cookie->sflow.vlan_tci = vlan_tci;
1639 /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output
1640 * port information") for the interpretation of cookie->output. */
1641 switch (n_outputs) {
1643 /* 0x40000000 | 256 means "packet dropped for unknown reason". */
1644 cookie->sflow.output = 0x40000000 | 256;
1648 ifindex = dpif_sflow_odp_port_to_ifindex(xbridge->sflow, odp_port);
1650 cookie->sflow.output = ifindex;
1655 /* 0x80000000 means "multiple output ports. */
1656 cookie->sflow.output = 0x80000000 | n_outputs;
1661 /* Compose SAMPLE action for sFlow bridge sampling. */
1663 compose_sflow_action(const struct xbridge *xbridge,
1664 struct ofpbuf *odp_actions,
1665 const struct flow *flow,
1666 odp_port_t odp_port)
1668 uint32_t probability;
1669 union user_action_cookie cookie;
1671 if (!xbridge->sflow || flow->in_port.ofp_port == OFPP_NONE) {
1675 probability = dpif_sflow_get_probability(xbridge->sflow);
1676 compose_sflow_cookie(xbridge, htons(0), odp_port,
1677 odp_port == ODPP_NONE ? 0 : 1, &cookie);
1679 return compose_sample_action(xbridge, odp_actions, flow, probability,
1680 &cookie, sizeof cookie.sflow);
1684 compose_flow_sample_cookie(uint16_t probability, uint32_t collector_set_id,
1685 uint32_t obs_domain_id, uint32_t obs_point_id,
1686 union user_action_cookie *cookie)
1688 cookie->type = USER_ACTION_COOKIE_FLOW_SAMPLE;
1689 cookie->flow_sample.probability = probability;
1690 cookie->flow_sample.collector_set_id = collector_set_id;
1691 cookie->flow_sample.obs_domain_id = obs_domain_id;
1692 cookie->flow_sample.obs_point_id = obs_point_id;
1696 compose_ipfix_cookie(union user_action_cookie *cookie)
1698 cookie->type = USER_ACTION_COOKIE_IPFIX;
1701 /* Compose SAMPLE action for IPFIX bridge sampling. */
1703 compose_ipfix_action(const struct xbridge *xbridge,
1704 struct ofpbuf *odp_actions,
1705 const struct flow *flow)
1707 uint32_t probability;
1708 union user_action_cookie cookie;
1710 if (!xbridge->ipfix || flow->in_port.ofp_port == OFPP_NONE) {
1714 probability = dpif_ipfix_get_bridge_exporter_probability(xbridge->ipfix);
1715 compose_ipfix_cookie(&cookie);
1717 compose_sample_action(xbridge, odp_actions, flow, probability,
1718 &cookie, sizeof cookie.ipfix);
1721 /* SAMPLE action for sFlow must be first action in any given list of
1722 * actions. At this point we do not have all information required to
1723 * build it. So try to build sample action as complete as possible. */
1725 add_sflow_action(struct xlate_ctx *ctx)
1727 ctx->user_cookie_offset = compose_sflow_action(ctx->xbridge,
1728 &ctx->xout->odp_actions,
1729 &ctx->xin->flow, ODPP_NONE);
1730 ctx->sflow_odp_port = 0;
1731 ctx->sflow_n_outputs = 0;
1734 /* SAMPLE action for IPFIX must be 1st or 2nd action in any given list
1735 * of actions, eventually after the SAMPLE action for sFlow. */
1737 add_ipfix_action(struct xlate_ctx *ctx)
1739 compose_ipfix_action(ctx->xbridge, &ctx->xout->odp_actions,
1743 /* Fix SAMPLE action according to data collected while composing ODP actions.
1744 * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested
1745 * USERSPACE action's user-cookie which is required for sflow. */
1747 fix_sflow_action(struct xlate_ctx *ctx)
1749 const struct flow *base = &ctx->base_flow;
1750 union user_action_cookie *cookie;
1752 if (!ctx->user_cookie_offset) {
1756 cookie = ofpbuf_at(&ctx->xout->odp_actions, ctx->user_cookie_offset,
1757 sizeof cookie->sflow);
1758 ovs_assert(cookie->type == USER_ACTION_COOKIE_SFLOW);
1760 compose_sflow_cookie(ctx->xbridge, base->vlan_tci,
1761 ctx->sflow_odp_port, ctx->sflow_n_outputs, cookie);
1764 static enum slow_path_reason
1765 process_special(struct xlate_ctx *ctx, const struct flow *flow,
1766 const struct xport *xport, const struct ofpbuf *packet)
1768 struct flow_wildcards *wc = &ctx->xout->wc;
1769 const struct xbridge *xbridge = ctx->xbridge;
1773 } else if (xport->cfm && cfm_should_process_flow(xport->cfm, flow, wc)) {
1775 cfm_process_heartbeat(xport->cfm, packet);
1778 } else if (xport->bfd && bfd_should_process_flow(xport->bfd, flow, wc)) {
1780 bfd_process_packet(xport->bfd, flow, packet);
1781 /* If POLL received, immediately sends FINAL back. */
1782 if (bfd_should_send_packet(xport->bfd)) {
1783 ofproto_dpif_monitor_port_send_soon(xport->ofport);
1787 } else if (xport->xbundle && xport->xbundle->lacp
1788 && flow->dl_type == htons(ETH_TYPE_LACP)) {
1790 lacp_process_packet(xport->xbundle->lacp, xport->ofport, packet);
1793 } else if (xbridge->stp && stp_should_process_flow(flow, wc)) {
1795 stp_process_packet(xport, packet);
1804 compose_output_action__(struct xlate_ctx *ctx, ofp_port_t ofp_port,
1807 const struct xport *xport = get_ofp_port(ctx->xbridge, ofp_port);
1808 struct flow_wildcards *wc = &ctx->xout->wc;
1809 struct flow *flow = &ctx->xin->flow;
1810 ovs_be16 flow_vlan_tci;
1811 uint32_t flow_pkt_mark;
1812 uint8_t flow_nw_tos;
1813 odp_port_t out_port, odp_port;
1816 /* If 'struct flow' gets additional metadata, we'll need to zero it out
1817 * before traversing a patch port. */
1818 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 26);
1821 xlate_report(ctx, "Nonexistent output port");
1823 } else if (xport->config & OFPUTIL_PC_NO_FWD) {
1824 xlate_report(ctx, "OFPPC_NO_FWD set, skipping output");
1826 } else if (check_stp) {
1827 if (is_stp(&ctx->base_flow)) {
1828 if (!xport_stp_should_forward_bpdu(xport)) {
1829 xlate_report(ctx, "STP not in listening state, "
1830 "skipping bpdu output");
1833 } else if (!xport_stp_forward_state(xport)) {
1834 xlate_report(ctx, "STP not in forwarding state, "
1840 if (mbridge_has_mirrors(ctx->xbridge->mbridge) && xport->xbundle) {
1841 ctx->xout->mirrors |= xbundle_mirror_dst(xport->xbundle->xbridge,
1846 const struct xport *peer = xport->peer;
1847 struct flow old_flow = ctx->xin->flow;
1848 enum slow_path_reason special;
1849 uint8_t table_id = rule_dpif_lookup_get_init_table_id(&ctx->xin->flow);
1851 ctx->xbridge = peer->xbridge;
1852 flow->in_port.ofp_port = peer->ofp_port;
1853 flow->metadata = htonll(0);
1854 memset(&flow->tunnel, 0, sizeof flow->tunnel);
1855 memset(flow->regs, 0, sizeof flow->regs);
1857 special = process_special(ctx, &ctx->xin->flow, peer,
1860 ctx->xout->slow |= special;
1861 } else if (may_receive(peer, ctx)) {
1862 if (xport_stp_forward_state(peer)) {
1863 xlate_table_action(ctx, flow->in_port.ofp_port, table_id,
1866 /* Forwarding is disabled by STP. Let OFPP_NORMAL and the
1867 * learning action look at the packet, then drop it. */
1868 struct flow old_base_flow = ctx->base_flow;
1869 size_t old_size = ofpbuf_size(&ctx->xout->odp_actions);
1870 mirror_mask_t old_mirrors = ctx->xout->mirrors;
1871 xlate_table_action(ctx, flow->in_port.ofp_port, table_id,
1873 ctx->xout->mirrors = old_mirrors;
1874 ctx->base_flow = old_base_flow;
1875 ofpbuf_set_size(&ctx->xout->odp_actions, old_size);
1879 ctx->xin->flow = old_flow;
1880 ctx->xbridge = xport->xbridge;
1882 if (ctx->xin->resubmit_stats) {
1883 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
1884 netdev_vport_inc_rx(peer->netdev, ctx->xin->resubmit_stats);
1886 bfd_account_rx(peer->bfd, ctx->xin->resubmit_stats);
1889 if (ctx->xin->xcache) {
1890 struct xc_entry *entry;
1892 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NETDEV);
1893 entry->u.dev.tx = netdev_ref(xport->netdev);
1894 entry->u.dev.rx = netdev_ref(peer->netdev);
1895 entry->u.dev.bfd = bfd_ref(peer->bfd);
1901 flow_vlan_tci = flow->vlan_tci;
1902 flow_pkt_mark = flow->pkt_mark;
1903 flow_nw_tos = flow->nw_tos;
1905 if (dscp_from_skb_priority(xport, flow->skb_priority, &dscp)) {
1906 wc->masks.nw_tos |= IP_DSCP_MASK;
1907 flow->nw_tos &= ~IP_DSCP_MASK;
1908 flow->nw_tos |= dscp;
1911 if (xport->is_tunnel) {
1912 /* Save tunnel metadata so that changes made due to
1913 * the Logical (tunnel) Port are not visible for any further
1914 * matches, while explicit set actions on tunnel metadata are.
1916 struct flow_tnl flow_tnl = flow->tunnel;
1917 odp_port = tnl_port_send(xport->ofport, flow, &ctx->xout->wc);
1918 if (odp_port == ODPP_NONE) {
1919 xlate_report(ctx, "Tunneling decided against output");
1920 goto out; /* restore flow_nw_tos */
1922 if (flow->tunnel.ip_dst == ctx->orig_tunnel_ip_dst) {
1923 xlate_report(ctx, "Not tunneling to our own address");
1924 goto out; /* restore flow_nw_tos */
1926 if (ctx->xin->resubmit_stats) {
1927 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
1929 if (ctx->xin->xcache) {
1930 struct xc_entry *entry;
1932 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NETDEV);
1933 entry->u.dev.tx = netdev_ref(xport->netdev);
1935 out_port = odp_port;
1936 commit_odp_tunnel_action(flow, &ctx->base_flow,
1937 &ctx->xout->odp_actions);
1938 flow->tunnel = flow_tnl; /* Restore tunnel metadata */
1940 odp_port = xport->odp_port;
1941 out_port = odp_port;
1942 if (ofproto_has_vlan_splinters(ctx->xbridge->ofproto)) {
1943 ofp_port_t vlandev_port;
1945 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
1946 vlandev_port = vsp_realdev_to_vlandev(ctx->xbridge->ofproto,
1947 ofp_port, flow->vlan_tci);
1948 if (vlandev_port != ofp_port) {
1949 out_port = ofp_port_to_odp_port(ctx->xbridge, vlandev_port);
1950 flow->vlan_tci = htons(0);
1955 if (out_port != ODPP_NONE) {
1956 ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow,
1957 &ctx->xout->odp_actions,
1960 if (ctx->use_recirc) {
1961 struct ovs_action_hash *act_hash;
1962 struct xlate_recirc *xr = &ctx->recirc;
1965 act_hash = nl_msg_put_unspec_uninit(&ctx->xout->odp_actions,
1966 OVS_ACTION_ATTR_HASH,
1968 act_hash->hash_alg = xr->hash_alg;
1969 act_hash->hash_basis = xr->hash_basis;
1971 /* Recirc action. */
1972 nl_msg_put_u32(&ctx->xout->odp_actions, OVS_ACTION_ATTR_RECIRC,
1975 nl_msg_put_odp_port(&ctx->xout->odp_actions, OVS_ACTION_ATTR_OUTPUT,
1979 ctx->sflow_odp_port = odp_port;
1980 ctx->sflow_n_outputs++;
1981 ctx->xout->nf_output_iface = ofp_port;
1986 flow->vlan_tci = flow_vlan_tci;
1987 flow->pkt_mark = flow_pkt_mark;
1988 flow->nw_tos = flow_nw_tos;
1992 compose_output_action(struct xlate_ctx *ctx, ofp_port_t ofp_port)
1994 compose_output_action__(ctx, ofp_port, true);
1998 xlate_recursively(struct xlate_ctx *ctx, struct rule_dpif *rule)
2000 struct rule_dpif *old_rule = ctx->rule;
2001 const struct rule_actions *actions;
2003 if (ctx->xin->resubmit_stats) {
2004 rule_dpif_credit_stats(rule, ctx->xin->resubmit_stats);
2010 actions = rule_dpif_get_actions(rule);
2011 do_xlate_actions(actions->ofpacts, actions->ofpacts_len, ctx);
2012 ctx->rule = old_rule;
2017 xlate_resubmit_resource_check(struct xlate_ctx *ctx)
2019 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
2021 if (ctx->recurse >= MAX_RESUBMIT_RECURSION + MAX_INTERNAL_RESUBMITS) {
2022 VLOG_ERR_RL(&rl, "resubmit actions recursed over %d times",
2023 MAX_RESUBMIT_RECURSION);
2024 } else if (ctx->resubmits >= MAX_RESUBMITS + MAX_INTERNAL_RESUBMITS) {
2025 VLOG_ERR_RL(&rl, "over %d resubmit actions", MAX_RESUBMITS);
2026 } else if (ofpbuf_size(&ctx->xout->odp_actions) > UINT16_MAX) {
2027 VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of actions");
2028 } else if (ofpbuf_size(&ctx->stack) >= 65536) {
2029 VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of stack");
2038 xlate_table_action(struct xlate_ctx *ctx, ofp_port_t in_port, uint8_t table_id,
2039 bool may_packet_in, bool honor_table_miss)
2041 if (xlate_resubmit_resource_check(ctx)) {
2042 ofp_port_t old_in_port = ctx->xin->flow.in_port.ofp_port;
2043 bool skip_wildcards = ctx->xin->skip_wildcards;
2044 uint8_t old_table_id = ctx->table_id;
2045 struct rule_dpif *rule;
2046 enum rule_dpif_lookup_verdict verdict;
2047 enum ofputil_port_config config = 0;
2049 ctx->table_id = table_id;
2051 /* Look up a flow with 'in_port' as the input port. Then restore the
2052 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
2053 * have surprising behavior). */
2054 ctx->xin->flow.in_port.ofp_port = in_port;
2055 verdict = rule_dpif_lookup_from_table(ctx->xbridge->ofproto,
2058 ? &ctx->xout->wc : NULL,
2060 &ctx->table_id, &rule,
2061 ctx->xin->xcache != NULL);
2062 ctx->xin->flow.in_port.ofp_port = old_in_port;
2064 if (ctx->xin->resubmit_hook) {
2065 ctx->xin->resubmit_hook(ctx->xin, rule, ctx->recurse);
2069 case RULE_DPIF_LOOKUP_VERDICT_MATCH:
2071 case RULE_DPIF_LOOKUP_VERDICT_CONTROLLER:
2072 if (may_packet_in) {
2073 struct xport *xport;
2075 xport = get_ofp_port(ctx->xbridge,
2076 ctx->xin->flow.in_port.ofp_port);
2077 config = xport ? xport->config : 0;
2080 /* Fall through to drop */
2081 case RULE_DPIF_LOOKUP_VERDICT_DROP:
2082 config = OFPUTIL_PC_NO_PACKET_IN;
2084 case RULE_DPIF_LOOKUP_VERDICT_DEFAULT:
2085 if (!ofproto_dpif_wants_packet_in_on_miss(ctx->xbridge->ofproto)) {
2086 config = OFPUTIL_PC_NO_PACKET_IN;
2093 choose_miss_rule(config, ctx->xbridge->miss_rule,
2094 ctx->xbridge->no_packet_in_rule, &rule,
2095 ctx->xin->xcache != NULL);
2099 /* Fill in the cache entry here instead of xlate_recursively
2100 * to make the reference counting more explicit. We take a
2101 * reference in the lookups above if we are going to cache the
2103 if (ctx->xin->xcache) {
2104 struct xc_entry *entry;
2106 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_RULE);
2107 entry->u.rule = rule;
2109 xlate_recursively(ctx, rule);
2112 ctx->table_id = old_table_id;
2120 xlate_group_bucket(struct xlate_ctx *ctx, const struct ofputil_bucket *bucket)
2122 uint64_t action_list_stub[1024 / 8];
2123 struct ofpbuf action_list, action_set;
2125 ofpbuf_use_const(&action_set, bucket->ofpacts, bucket->ofpacts_len);
2126 ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub);
2128 ofpacts_execute_action_set(&action_list, &action_set);
2130 do_xlate_actions(ofpbuf_data(&action_list), ofpbuf_size(&action_list), ctx);
2133 ofpbuf_uninit(&action_set);
2134 ofpbuf_uninit(&action_list);
2138 xlate_all_group(struct xlate_ctx *ctx, struct group_dpif *group)
2140 const struct ofputil_bucket *bucket;
2141 const struct list *buckets;
2142 struct flow old_flow = ctx->xin->flow;
2144 group_dpif_get_buckets(group, &buckets);
2146 LIST_FOR_EACH (bucket, list_node, buckets) {
2147 xlate_group_bucket(ctx, bucket);
2148 /* Roll back flow to previous state.
2149 * This is equivalent to cloning the packet for each bucket.
2151 * As a side effect any subsequently applied actions will
2152 * also effectively be applied to a clone of the packet taken
2153 * just before applying the all or indirect group. */
2154 ctx->xin->flow = old_flow;
2159 xlate_ff_group(struct xlate_ctx *ctx, struct group_dpif *group)
2161 const struct ofputil_bucket *bucket;
2163 bucket = group_first_live_bucket(ctx, group, 0);
2165 xlate_group_bucket(ctx, bucket);
2170 xlate_select_group(struct xlate_ctx *ctx, struct group_dpif *group)
2172 struct flow_wildcards *wc = &ctx->xout->wc;
2173 const struct ofputil_bucket *bucket;
2176 basis = hash_mac(ctx->xin->flow.dl_dst, 0, 0);
2177 bucket = group_best_live_bucket(ctx, group, basis);
2179 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
2180 xlate_group_bucket(ctx, bucket);
2185 xlate_group_action__(struct xlate_ctx *ctx, struct group_dpif *group)
2187 ctx->in_group = true;
2189 switch (group_dpif_get_type(group)) {
2191 case OFPGT11_INDIRECT:
2192 xlate_all_group(ctx, group);
2194 case OFPGT11_SELECT:
2195 xlate_select_group(ctx, group);
2198 xlate_ff_group(ctx, group);
2203 group_dpif_release(group);
2205 ctx->in_group = false;
2209 xlate_group_resource_check(struct xlate_ctx *ctx)
2211 if (!xlate_resubmit_resource_check(ctx)) {
2213 } else if (ctx->in_group) {
2214 /* Prevent nested translation of OpenFlow groups.
2216 * OpenFlow allows this restriction. We enforce this restriction only
2217 * because, with the current architecture, we would otherwise have to
2218 * take a possibly recursive read lock on the ofgroup rwlock, which is
2219 * unsafe given that POSIX allows taking a read lock to block if there
2220 * is a thread blocked on taking the write lock. Other solutions
2221 * without this restriction are also possible, but seem unwarranted
2222 * given the current limited use of groups. */
2223 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
2225 VLOG_ERR_RL(&rl, "cannot recursively translate OpenFlow group");
2233 xlate_group_action(struct xlate_ctx *ctx, uint32_t group_id)
2235 if (xlate_group_resource_check(ctx)) {
2236 struct group_dpif *group;
2239 got_group = group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group);
2241 xlate_group_action__(ctx, group);
2251 xlate_ofpact_resubmit(struct xlate_ctx *ctx,
2252 const struct ofpact_resubmit *resubmit)
2256 bool may_packet_in = false;
2257 bool honor_table_miss = false;
2259 if (ctx->rule && rule_dpif_is_internal(ctx->rule)) {
2260 /* Still allow missed packets to be sent to the controller
2261 * if resubmitting from an internal table. */
2262 may_packet_in = true;
2263 honor_table_miss = true;
2266 in_port = resubmit->in_port;
2267 if (in_port == OFPP_IN_PORT) {
2268 in_port = ctx->xin->flow.in_port.ofp_port;
2271 table_id = resubmit->table_id;
2272 if (table_id == 255) {
2273 table_id = ctx->table_id;
2276 xlate_table_action(ctx, in_port, table_id, may_packet_in,
2281 flood_packets(struct xlate_ctx *ctx, bool all)
2283 const struct xport *xport;
2285 HMAP_FOR_EACH (xport, ofp_node, &ctx->xbridge->xports) {
2286 if (xport->ofp_port == ctx->xin->flow.in_port.ofp_port) {
2291 compose_output_action__(ctx, xport->ofp_port, false);
2292 } else if (!(xport->config & OFPUTIL_PC_NO_FLOOD)) {
2293 compose_output_action(ctx, xport->ofp_port);
2297 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
2301 execute_controller_action(struct xlate_ctx *ctx, int len,
2302 enum ofp_packet_in_reason reason,
2303 uint16_t controller_id)
2305 struct ofproto_packet_in *pin;
2306 struct ofpbuf *packet;
2307 struct pkt_metadata md = PKT_METADATA_INITIALIZER(0);
2309 ctx->xout->slow |= SLOW_CONTROLLER;
2310 if (!ctx->xin->packet) {
2314 packet = ofpbuf_clone(ctx->xin->packet);
2316 ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
2317 &ctx->xout->odp_actions,
2320 odp_execute_actions(NULL, packet, false, &md,
2321 ofpbuf_data(&ctx->xout->odp_actions),
2322 ofpbuf_size(&ctx->xout->odp_actions), NULL);
2324 pin = xmalloc(sizeof *pin);
2325 pin->up.packet_len = ofpbuf_size(packet);
2326 pin->up.packet = ofpbuf_steal_data(packet);
2327 pin->up.reason = reason;
2328 pin->up.table_id = ctx->table_id;
2329 pin->up.cookie = (ctx->rule
2330 ? rule_dpif_get_flow_cookie(ctx->rule)
2333 flow_get_metadata(&ctx->xin->flow, &pin->up.fmd);
2335 pin->controller_id = controller_id;
2336 pin->send_len = len;
2337 /* If a rule is a table-miss rule then this is
2338 * a table-miss handled by a table-miss rule.
2340 * Else, if rule is internal and has a controller action,
2341 * the later being implied by the rule being processed here,
2342 * then this is a table-miss handled without a table-miss rule.
2344 * Otherwise this is not a table-miss. */
2345 pin->miss_type = OFPROTO_PACKET_IN_NO_MISS;
2347 if (rule_dpif_is_table_miss(ctx->rule)) {
2348 pin->miss_type = OFPROTO_PACKET_IN_MISS_FLOW;
2349 } else if (rule_dpif_is_internal(ctx->rule)) {
2350 pin->miss_type = OFPROTO_PACKET_IN_MISS_WITHOUT_FLOW;
2353 ofproto_dpif_send_packet_in(ctx->xbridge->ofproto, pin);
2354 ofpbuf_delete(packet);
2358 compose_mpls_push_action(struct xlate_ctx *ctx, struct ofpact_push_mpls *mpls)
2360 struct flow_wildcards *wc = &ctx->xout->wc;
2361 struct flow *flow = &ctx->xin->flow;
2364 ovs_assert(eth_type_mpls(mpls->ethertype));
2366 n = flow_count_mpls_labels(flow, wc);
2368 ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow,
2369 &ctx->xout->odp_actions,
2371 } else if (n >= FLOW_MAX_MPLS_LABELS) {
2372 if (ctx->xin->packet != NULL) {
2373 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2374 VLOG_WARN_RL(&rl, "bridge %s: dropping packet on which an "
2375 "MPLS push action can't be performed as it would "
2376 "have more MPLS LSEs than the %d supported.",
2377 ctx->xbridge->name, FLOW_MAX_MPLS_LABELS);
2381 } else if (n >= ctx->xbridge->max_mpls_depth) {
2382 COVERAGE_INC(xlate_actions_mpls_overflow);
2383 ctx->xout->slow |= SLOW_ACTION;
2386 flow_push_mpls(flow, n, mpls->ethertype, wc);
2390 compose_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type)
2392 struct flow_wildcards *wc = &ctx->xout->wc;
2393 struct flow *flow = &ctx->xin->flow;
2394 int n = flow_count_mpls_labels(flow, wc);
2396 if (!flow_pop_mpls(flow, n, eth_type, wc) && 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 pop action can't be performed as it has "
2401 "more MPLS LSEs than the %d supported.",
2402 ctx->xbridge->name, FLOW_MAX_MPLS_LABELS);
2405 ofpbuf_clear(&ctx->xout->odp_actions);
2410 compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids)
2412 struct flow *flow = &ctx->xin->flow;
2414 if (!is_ip_any(flow)) {
2418 ctx->xout->wc.masks.nw_ttl = 0xff;
2419 if (flow->nw_ttl > 1) {
2425 for (i = 0; i < ids->n_controllers; i++) {
2426 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL,
2430 /* Stop processing for current table. */
2436 compose_set_mpls_label_action(struct xlate_ctx *ctx, ovs_be32 label)
2438 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
2439 ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_LABEL_MASK);
2440 set_mpls_lse_label(&ctx->xin->flow.mpls_lse[0], label);
2445 compose_set_mpls_tc_action(struct xlate_ctx *ctx, uint8_t tc)
2447 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
2448 ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_TC_MASK);
2449 set_mpls_lse_tc(&ctx->xin->flow.mpls_lse[0], tc);
2454 compose_set_mpls_ttl_action(struct xlate_ctx *ctx, uint8_t ttl)
2456 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
2457 ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_TTL_MASK);
2458 set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse[0], ttl);
2463 compose_dec_mpls_ttl_action(struct xlate_ctx *ctx)
2465 struct flow *flow = &ctx->xin->flow;
2466 uint8_t ttl = mpls_lse_to_ttl(flow->mpls_lse[0]);
2467 struct flow_wildcards *wc = &ctx->xout->wc;
2469 memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse);
2470 if (eth_type_mpls(flow->dl_type)) {
2473 set_mpls_lse_ttl(&flow->mpls_lse[0], ttl);
2476 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, 0);
2478 /* Stop processing for current table. */
2487 xlate_output_action(struct xlate_ctx *ctx,
2488 ofp_port_t port, uint16_t max_len, bool may_packet_in)
2490 ofp_port_t prev_nf_output_iface = ctx->xout->nf_output_iface;
2492 ctx->xout->nf_output_iface = NF_OUT_DROP;
2496 compose_output_action(ctx, ctx->xin->flow.in_port.ofp_port);
2499 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
2500 0, may_packet_in, true);
2506 flood_packets(ctx, false);
2509 flood_packets(ctx, true);
2511 case OFPP_CONTROLLER:
2512 execute_controller_action(ctx, max_len, OFPR_ACTION, 0);
2518 if (port != ctx->xin->flow.in_port.ofp_port) {
2519 compose_output_action(ctx, port);
2521 xlate_report(ctx, "skipping output to input port");
2526 if (prev_nf_output_iface == NF_OUT_FLOOD) {
2527 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
2528 } else if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
2529 ctx->xout->nf_output_iface = prev_nf_output_iface;
2530 } else if (prev_nf_output_iface != NF_OUT_DROP &&
2531 ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
2532 ctx->xout->nf_output_iface = NF_OUT_MULTI;
2537 xlate_output_reg_action(struct xlate_ctx *ctx,
2538 const struct ofpact_output_reg *or)
2540 uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow);
2541 if (port <= UINT16_MAX) {
2542 union mf_subvalue value;
2544 memset(&value, 0xff, sizeof value);
2545 mf_write_subfield_flow(&or->src, &value, &ctx->xout->wc.masks);
2546 xlate_output_action(ctx, u16_to_ofp(port),
2547 or->max_len, false);
2552 xlate_enqueue_action(struct xlate_ctx *ctx,
2553 const struct ofpact_enqueue *enqueue)
2555 ofp_port_t ofp_port = enqueue->port;
2556 uint32_t queue_id = enqueue->queue;
2557 uint32_t flow_priority, priority;
2560 /* Translate queue to priority. */
2561 error = dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &priority);
2563 /* Fall back to ordinary output action. */
2564 xlate_output_action(ctx, enqueue->port, 0, false);
2568 /* Check output port. */
2569 if (ofp_port == OFPP_IN_PORT) {
2570 ofp_port = ctx->xin->flow.in_port.ofp_port;
2571 } else if (ofp_port == ctx->xin->flow.in_port.ofp_port) {
2575 /* Add datapath actions. */
2576 flow_priority = ctx->xin->flow.skb_priority;
2577 ctx->xin->flow.skb_priority = priority;
2578 compose_output_action(ctx, ofp_port);
2579 ctx->xin->flow.skb_priority = flow_priority;
2581 /* Update NetFlow output port. */
2582 if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
2583 ctx->xout->nf_output_iface = ofp_port;
2584 } else if (ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
2585 ctx->xout->nf_output_iface = NF_OUT_MULTI;
2590 xlate_set_queue_action(struct xlate_ctx *ctx, uint32_t queue_id)
2592 uint32_t skb_priority;
2594 if (!dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &skb_priority)) {
2595 ctx->xin->flow.skb_priority = skb_priority;
2597 /* Couldn't translate queue to a priority. Nothing to do. A warning
2598 * has already been logged. */
2603 slave_enabled_cb(ofp_port_t ofp_port, void *xbridge_)
2605 const struct xbridge *xbridge = xbridge_;
2616 case OFPP_CONTROLLER: /* Not supported by the bundle action. */
2619 port = get_ofp_port(xbridge, ofp_port);
2620 return port ? port->may_enable : false;
2625 xlate_bundle_action(struct xlate_ctx *ctx,
2626 const struct ofpact_bundle *bundle)
2630 port = bundle_execute(bundle, &ctx->xin->flow, &ctx->xout->wc,
2632 CONST_CAST(struct xbridge *, ctx->xbridge));
2633 if (bundle->dst.field) {
2634 nxm_reg_load(&bundle->dst, ofp_to_u16(port), &ctx->xin->flow,
2637 xlate_output_action(ctx, port, 0, false);
2642 xlate_learn_action__(struct xlate_ctx *ctx, const struct ofpact_learn *learn,
2643 struct ofputil_flow_mod *fm, struct ofpbuf *ofpacts)
2645 learn_execute(learn, &ctx->xin->flow, fm, ofpacts);
2646 if (ctx->xin->may_learn) {
2647 ofproto_dpif_flow_mod(ctx->xbridge->ofproto, fm);
2652 xlate_learn_action(struct xlate_ctx *ctx, const struct ofpact_learn *learn)
2654 ctx->xout->has_learn = true;
2655 learn_mask(learn, &ctx->xout->wc);
2657 if (ctx->xin->xcache) {
2658 struct xc_entry *entry;
2660 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_LEARN);
2661 entry->u.learn.ofproto = ctx->xbridge->ofproto;
2662 entry->u.learn.fm = xmalloc(sizeof *entry->u.learn.fm);
2663 entry->u.learn.ofpacts = ofpbuf_new(64);
2664 xlate_learn_action__(ctx, learn, entry->u.learn.fm,
2665 entry->u.learn.ofpacts);
2666 } else if (ctx->xin->may_learn) {
2667 uint64_t ofpacts_stub[1024 / 8];
2668 struct ofputil_flow_mod fm;
2669 struct ofpbuf ofpacts;
2671 ofpbuf_use_stub(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
2672 xlate_learn_action__(ctx, learn, &fm, &ofpacts);
2673 ofpbuf_uninit(&ofpacts);
2678 xlate_fin_timeout__(struct rule_dpif *rule, uint16_t tcp_flags,
2679 uint16_t idle_timeout, uint16_t hard_timeout)
2681 if (tcp_flags & (TCP_FIN | TCP_RST)) {
2682 rule_dpif_reduce_timeouts(rule, idle_timeout, hard_timeout);
2687 xlate_fin_timeout(struct xlate_ctx *ctx,
2688 const struct ofpact_fin_timeout *oft)
2691 xlate_fin_timeout__(ctx->rule, ctx->xin->tcp_flags,
2692 oft->fin_idle_timeout, oft->fin_hard_timeout);
2693 if (ctx->xin->xcache) {
2694 struct xc_entry *entry;
2696 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_FIN_TIMEOUT);
2697 /* XC_RULE already holds a reference on the rule, none is taken
2699 entry->u.fin.rule = ctx->rule;
2700 entry->u.fin.idle = oft->fin_idle_timeout;
2701 entry->u.fin.hard = oft->fin_hard_timeout;
2707 xlate_sample_action(struct xlate_ctx *ctx,
2708 const struct ofpact_sample *os)
2710 union user_action_cookie cookie;
2711 /* Scale the probability from 16-bit to 32-bit while representing
2712 * the same percentage. */
2713 uint32_t probability = (os->probability << 16) | os->probability;
2715 if (!ctx->xbridge->variable_length_userdata) {
2716 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
2718 VLOG_ERR_RL(&rl, "ignoring NXAST_SAMPLE action because datapath "
2719 "lacks support (needs Linux 3.10+ or kernel module from "
2724 ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
2725 &ctx->xout->odp_actions,
2728 compose_flow_sample_cookie(os->probability, os->collector_set_id,
2729 os->obs_domain_id, os->obs_point_id, &cookie);
2730 compose_sample_action(ctx->xbridge, &ctx->xout->odp_actions, &ctx->xin->flow,
2731 probability, &cookie, sizeof cookie.flow_sample);
2735 may_receive(const struct xport *xport, struct xlate_ctx *ctx)
2737 if (xport->config & (is_stp(&ctx->xin->flow)
2738 ? OFPUTIL_PC_NO_RECV_STP
2739 : OFPUTIL_PC_NO_RECV)) {
2743 /* Only drop packets here if both forwarding and learning are
2744 * disabled. If just learning is enabled, we need to have
2745 * OFPP_NORMAL and the learning action have a look at the packet
2746 * before we can drop it. */
2747 if (!xport_stp_forward_state(xport) && !xport_stp_learn_state(xport)) {
2755 xlate_write_actions(struct xlate_ctx *ctx, const struct ofpact *a)
2757 struct ofpact_nest *on = ofpact_get_WRITE_ACTIONS(a);
2758 ofpbuf_put(&ctx->action_set, on->actions, ofpact_nest_get_action_len(on));
2759 ofpact_pad(&ctx->action_set);
2763 xlate_action_set(struct xlate_ctx *ctx)
2765 uint64_t action_list_stub[1024 / 64];
2766 struct ofpbuf action_list;
2768 ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub);
2769 ofpacts_execute_action_set(&action_list, &ctx->action_set);
2770 do_xlate_actions(ofpbuf_data(&action_list), ofpbuf_size(&action_list), ctx);
2771 ofpbuf_uninit(&action_list);
2775 do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len,
2776 struct xlate_ctx *ctx)
2778 struct flow_wildcards *wc = &ctx->xout->wc;
2779 struct flow *flow = &ctx->xin->flow;
2780 const struct ofpact *a;
2782 /* dl_type already in the mask, not set below. */
2784 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
2785 struct ofpact_controller *controller;
2786 const struct ofpact_metadata *metadata;
2787 const struct ofpact_set_field *set_field;
2788 const struct mf_field *mf;
2796 xlate_output_action(ctx, ofpact_get_OUTPUT(a)->port,
2797 ofpact_get_OUTPUT(a)->max_len, true);
2801 if (xlate_group_action(ctx, ofpact_get_GROUP(a)->group_id)) {
2806 case OFPACT_CONTROLLER:
2807 controller = ofpact_get_CONTROLLER(a);
2808 execute_controller_action(ctx, controller->max_len,
2810 controller->controller_id);
2813 case OFPACT_ENQUEUE:
2814 xlate_enqueue_action(ctx, ofpact_get_ENQUEUE(a));
2817 case OFPACT_SET_VLAN_VID:
2818 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
2819 if (flow->vlan_tci & htons(VLAN_CFI) ||
2820 ofpact_get_SET_VLAN_VID(a)->push_vlan_if_needed) {
2821 flow->vlan_tci &= ~htons(VLAN_VID_MASK);
2822 flow->vlan_tci |= (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid)
2827 case OFPACT_SET_VLAN_PCP:
2828 wc->masks.vlan_tci |= htons(VLAN_PCP_MASK | VLAN_CFI);
2829 if (flow->vlan_tci & htons(VLAN_CFI) ||
2830 ofpact_get_SET_VLAN_PCP(a)->push_vlan_if_needed) {
2831 flow->vlan_tci &= ~htons(VLAN_PCP_MASK);
2832 flow->vlan_tci |= htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp
2833 << VLAN_PCP_SHIFT) | VLAN_CFI);
2837 case OFPACT_STRIP_VLAN:
2838 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
2839 flow->vlan_tci = htons(0);
2842 case OFPACT_PUSH_VLAN:
2843 /* XXX 802.1AD(QinQ) */
2844 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
2845 flow->vlan_tci = htons(VLAN_CFI);
2848 case OFPACT_SET_ETH_SRC:
2849 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
2850 memcpy(flow->dl_src, ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN);
2853 case OFPACT_SET_ETH_DST:
2854 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
2855 memcpy(flow->dl_dst, ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN);
2858 case OFPACT_SET_IPV4_SRC:
2859 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2860 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
2861 flow->nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4;
2865 case OFPACT_SET_IPV4_DST:
2866 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2867 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
2868 flow->nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4;
2872 case OFPACT_SET_IP_DSCP:
2873 if (is_ip_any(flow)) {
2874 wc->masks.nw_tos |= IP_DSCP_MASK;
2875 flow->nw_tos &= ~IP_DSCP_MASK;
2876 flow->nw_tos |= ofpact_get_SET_IP_DSCP(a)->dscp;
2880 case OFPACT_SET_IP_ECN:
2881 if (is_ip_any(flow)) {
2882 wc->masks.nw_tos |= IP_ECN_MASK;
2883 flow->nw_tos &= ~IP_ECN_MASK;
2884 flow->nw_tos |= ofpact_get_SET_IP_ECN(a)->ecn;
2888 case OFPACT_SET_IP_TTL:
2889 if (is_ip_any(flow)) {
2890 wc->masks.nw_ttl = 0xff;
2891 flow->nw_ttl = ofpact_get_SET_IP_TTL(a)->ttl;
2895 case OFPACT_SET_L4_SRC_PORT:
2896 if (is_ip_any(flow)) {
2897 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2898 memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src);
2899 flow->tp_src = htons(ofpact_get_SET_L4_SRC_PORT(a)->port);
2903 case OFPACT_SET_L4_DST_PORT:
2904 if (is_ip_any(flow)) {
2905 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2906 memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst);
2907 flow->tp_dst = htons(ofpact_get_SET_L4_DST_PORT(a)->port);
2911 case OFPACT_RESUBMIT:
2912 xlate_ofpact_resubmit(ctx, ofpact_get_RESUBMIT(a));
2915 case OFPACT_SET_TUNNEL:
2916 flow->tunnel.tun_id = htonll(ofpact_get_SET_TUNNEL(a)->tun_id);
2919 case OFPACT_SET_QUEUE:
2920 xlate_set_queue_action(ctx, ofpact_get_SET_QUEUE(a)->queue_id);
2923 case OFPACT_POP_QUEUE:
2924 flow->skb_priority = ctx->orig_skb_priority;
2927 case OFPACT_REG_MOVE:
2928 nxm_execute_reg_move(ofpact_get_REG_MOVE(a), flow, wc);
2931 case OFPACT_REG_LOAD:
2932 nxm_execute_reg_load(ofpact_get_REG_LOAD(a), flow, wc);
2935 case OFPACT_SET_FIELD:
2936 set_field = ofpact_get_SET_FIELD(a);
2937 mf = set_field->field;
2939 /* Set field action only ever overwrites packet's outermost
2940 * applicable header fields. Do nothing if no header exists. */
2941 if (mf->id == MFF_VLAN_VID) {
2942 wc->masks.vlan_tci |= htons(VLAN_CFI);
2943 if (!(flow->vlan_tci & htons(VLAN_CFI))) {
2946 } else if ((mf->id == MFF_MPLS_LABEL || mf->id == MFF_MPLS_TC)
2947 /* 'dl_type' is already unwildcarded. */
2948 && !eth_type_mpls(flow->dl_type)) {
2952 mf_mask_field_and_prereqs(mf, &wc->masks);
2953 mf_set_flow_value(mf, &set_field->value, flow);
2956 case OFPACT_STACK_PUSH:
2957 nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), flow, wc,
2961 case OFPACT_STACK_POP:
2962 nxm_execute_stack_pop(ofpact_get_STACK_POP(a), flow, wc,
2966 case OFPACT_PUSH_MPLS:
2967 compose_mpls_push_action(ctx, ofpact_get_PUSH_MPLS(a));
2970 case OFPACT_POP_MPLS:
2971 compose_mpls_pop_action(ctx, ofpact_get_POP_MPLS(a)->ethertype);
2974 case OFPACT_SET_MPLS_LABEL:
2975 compose_set_mpls_label_action(
2976 ctx, ofpact_get_SET_MPLS_LABEL(a)->label);
2979 case OFPACT_SET_MPLS_TC:
2980 compose_set_mpls_tc_action(ctx, ofpact_get_SET_MPLS_TC(a)->tc);
2983 case OFPACT_SET_MPLS_TTL:
2984 compose_set_mpls_ttl_action(ctx, ofpact_get_SET_MPLS_TTL(a)->ttl);
2987 case OFPACT_DEC_MPLS_TTL:
2988 if (compose_dec_mpls_ttl_action(ctx)) {
2993 case OFPACT_DEC_TTL:
2994 wc->masks.nw_ttl = 0xff;
2995 if (compose_dec_ttl(ctx, ofpact_get_DEC_TTL(a))) {
3001 /* Nothing to do. */
3004 case OFPACT_MULTIPATH:
3005 multipath_execute(ofpact_get_MULTIPATH(a), flow, wc);
3009 xlate_bundle_action(ctx, ofpact_get_BUNDLE(a));
3012 case OFPACT_OUTPUT_REG:
3013 xlate_output_reg_action(ctx, ofpact_get_OUTPUT_REG(a));
3017 xlate_learn_action(ctx, ofpact_get_LEARN(a));
3024 case OFPACT_FIN_TIMEOUT:
3025 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
3026 ctx->xout->has_fin_timeout = true;
3027 xlate_fin_timeout(ctx, ofpact_get_FIN_TIMEOUT(a));
3030 case OFPACT_CLEAR_ACTIONS:
3031 ofpbuf_clear(&ctx->action_set);
3034 case OFPACT_WRITE_ACTIONS:
3035 xlate_write_actions(ctx, a);
3038 case OFPACT_WRITE_METADATA:
3039 metadata = ofpact_get_WRITE_METADATA(a);
3040 flow->metadata &= ~metadata->mask;
3041 flow->metadata |= metadata->metadata & metadata->mask;
3045 /* Not implemented yet. */
3048 case OFPACT_GOTO_TABLE: {
3049 struct ofpact_goto_table *ogt = ofpact_get_GOTO_TABLE(a);
3051 ovs_assert(ctx->table_id < ogt->table_id);
3052 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
3053 ogt->table_id, true, true);
3058 xlate_sample_action(ctx, ofpact_get_SAMPLE(a));
3065 xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto,
3066 const struct flow *flow, struct rule_dpif *rule,
3067 uint16_t tcp_flags, const struct ofpbuf *packet)
3069 xin->ofproto = ofproto;
3071 xin->packet = packet;
3072 xin->may_learn = packet != NULL;
3075 xin->ofpacts = NULL;
3076 xin->ofpacts_len = 0;
3077 xin->tcp_flags = tcp_flags;
3078 xin->resubmit_hook = NULL;
3079 xin->report_hook = NULL;
3080 xin->resubmit_stats = NULL;
3081 xin->skip_wildcards = false;
3085 xlate_out_uninit(struct xlate_out *xout)
3088 ofpbuf_uninit(&xout->odp_actions);
3092 /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts'
3093 * into datapath actions, using 'ctx', and discards the datapath actions. */
3095 xlate_actions_for_side_effects(struct xlate_in *xin)
3097 struct xlate_out xout;
3099 xlate_actions(xin, &xout);
3100 xlate_out_uninit(&xout);
3104 xlate_report(struct xlate_ctx *ctx, const char *s)
3106 if (ctx->xin->report_hook) {
3107 ctx->xin->report_hook(ctx->xin, s, ctx->recurse);
3112 xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src)
3115 dst->slow = src->slow;
3116 dst->has_learn = src->has_learn;
3117 dst->has_normal = src->has_normal;
3118 dst->has_fin_timeout = src->has_fin_timeout;
3119 dst->nf_output_iface = src->nf_output_iface;
3120 dst->mirrors = src->mirrors;
3122 ofpbuf_use_stub(&dst->odp_actions, dst->odp_actions_stub,
3123 sizeof dst->odp_actions_stub);
3124 ofpbuf_put(&dst->odp_actions, ofpbuf_data(&src->odp_actions),
3125 ofpbuf_size(&src->odp_actions));
3128 static struct skb_priority_to_dscp *
3129 get_skb_priority(const struct xport *xport, uint32_t skb_priority)
3131 struct skb_priority_to_dscp *pdscp;
3134 hash = hash_int(skb_priority, 0);
3135 HMAP_FOR_EACH_IN_BUCKET (pdscp, hmap_node, hash, &xport->skb_priorities) {
3136 if (pdscp->skb_priority == skb_priority) {
3144 dscp_from_skb_priority(const struct xport *xport, uint32_t skb_priority,
3147 struct skb_priority_to_dscp *pdscp = get_skb_priority(xport, skb_priority);
3148 *dscp = pdscp ? pdscp->dscp : 0;
3149 return pdscp != NULL;
3153 clear_skb_priorities(struct xport *xport)
3155 struct skb_priority_to_dscp *pdscp, *next;
3157 HMAP_FOR_EACH_SAFE (pdscp, next, hmap_node, &xport->skb_priorities) {
3158 hmap_remove(&xport->skb_priorities, &pdscp->hmap_node);
3164 actions_output_to_local_port(const struct xlate_ctx *ctx)
3166 odp_port_t local_odp_port = ofp_port_to_odp_port(ctx->xbridge, OFPP_LOCAL);
3167 const struct nlattr *a;
3170 NL_ATTR_FOR_EACH_UNSAFE (a, left, ofpbuf_data(&ctx->xout->odp_actions),
3171 ofpbuf_size(&ctx->xout->odp_actions)) {
3172 if (nl_attr_type(a) == OVS_ACTION_ATTR_OUTPUT
3173 && nl_attr_get_odp_port(a) == local_odp_port) {
3180 /* Thread safe call to xlate_actions__(). */
3182 xlate_actions(struct xlate_in *xin, struct xlate_out *xout)
3183 OVS_EXCLUDED(xlate_rwlock)
3185 ovs_rwlock_rdlock(&xlate_rwlock);
3186 xlate_actions__(xin, xout);
3187 ovs_rwlock_unlock(&xlate_rwlock);
3190 /* Returns the maximum number of packets that the Linux kernel is willing to
3191 * queue up internally to certain kinds of software-implemented ports, or the
3192 * default (and rarely modified) value if it cannot be determined. */
3194 netdev_max_backlog(void)
3196 static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
3197 static int max_backlog = 1000; /* The normal default value. */
3199 if (ovsthread_once_start(&once)) {
3200 static const char filename[] = "/proc/sys/net/core/netdev_max_backlog";
3204 stream = fopen(filename, "r");
3206 VLOG_WARN("%s: open failed (%s)", filename, ovs_strerror(errno));
3208 if (fscanf(stream, "%d", &n) != 1) {
3209 VLOG_WARN("%s: read error", filename);
3210 } else if (n <= 100) {
3211 VLOG_WARN("%s: unexpectedly small value %d", filename, n);
3217 ovsthread_once_done(&once);
3219 VLOG_DBG("%s: using %d max_backlog", filename, max_backlog);
3225 /* Counts and returns the number of OVS_ACTION_ATTR_OUTPUT actions in
3228 count_output_actions(const struct ofpbuf *odp_actions)
3230 const struct nlattr *a;
3234 NL_ATTR_FOR_EACH_UNSAFE (a, left, ofpbuf_data(odp_actions),
3235 ofpbuf_size(odp_actions)) {
3236 if (a->nla_type == OVS_ACTION_ATTR_OUTPUT) {
3243 /* Returns true if 'odp_actions' contains more output actions than the datapath
3244 * can reliably handle in one go. On Linux, this is the value of the
3245 * net.core.netdev_max_backlog sysctl, which limits the maximum number of
3246 * packets that the kernel is willing to queue up for processing while the
3247 * datapath is processing a set of actions. */
3249 too_many_output_actions(const struct ofpbuf *odp_actions)
3252 return (ofpbuf_size(odp_actions) / NL_A_U32_SIZE > netdev_max_backlog()
3253 && count_output_actions(odp_actions) > netdev_max_backlog());
3255 /* OSes other than Linux might have similar limits, but we don't know how
3256 * to determine them.*/
3261 /* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts'
3262 * into datapath actions in 'odp_actions', using 'ctx'.
3264 * The caller must take responsibility for eventually freeing 'xout', with
3265 * xlate_out_uninit(). */
3267 xlate_actions__(struct xlate_in *xin, struct xlate_out *xout)
3268 OVS_REQ_RDLOCK(xlate_rwlock)
3270 struct flow_wildcards *wc = &xout->wc;
3271 struct flow *flow = &xin->flow;
3272 struct rule_dpif *rule = NULL;
3274 const struct rule_actions *actions = NULL;
3275 enum slow_path_reason special;
3276 const struct ofpact *ofpacts;
3277 struct xport *in_port;
3278 struct flow orig_flow;
3279 struct xlate_ctx ctx;
3284 COVERAGE_INC(xlate_actions);
3286 /* Flow initialization rules:
3287 * - 'base_flow' must match the kernel's view of the packet at the
3288 * time that action processing starts. 'flow' represents any
3289 * transformations we wish to make through actions.
3290 * - By default 'base_flow' and 'flow' are the same since the input
3291 * packet matches the output before any actions are applied.
3292 * - When using VLAN splinters, 'base_flow''s VLAN is set to the value
3293 * of the received packet as seen by the kernel. If we later output
3294 * to another device without any modifications this will cause us to
3295 * insert a new tag since the original one was stripped off by the
3297 * - Tunnel metadata as received is retained in 'flow'. This allows
3298 * tunnel metadata matching also in later tables.
3299 * Since a kernel action for setting the tunnel metadata will only be
3300 * generated with actual tunnel output, changing the tunnel metadata
3301 * values in 'flow' (such as tun_id) will only have effect with a later
3302 * tunnel output action.
3303 * - Tunnel 'base_flow' is completely cleared since that is what the
3304 * kernel does. If we wish to maintain the original values an action
3305 * needs to be generated. */
3310 ctx.xout->has_learn = false;
3311 ctx.xout->has_normal = false;
3312 ctx.xout->has_fin_timeout = false;
3313 ctx.xout->nf_output_iface = NF_OUT_DROP;
3314 ctx.xout->mirrors = 0;
3315 ofpbuf_use_stub(&ctx.xout->odp_actions, ctx.xout->odp_actions_stub,
3316 sizeof ctx.xout->odp_actions_stub);
3317 ofpbuf_reserve(&ctx.xout->odp_actions, NL_A_U32_SIZE);
3319 ctx.xbridge = xbridge_lookup(xin->ofproto);
3324 ctx.rule = xin->rule;
3326 ctx.base_flow = *flow;
3327 memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel);
3328 ctx.orig_tunnel_ip_dst = flow->tunnel.ip_dst;
3330 flow_wildcards_init_catchall(wc);
3331 memset(&wc->masks.in_port, 0xff, sizeof wc->masks.in_port);
3332 memset(&wc->masks.skb_priority, 0xff, sizeof wc->masks.skb_priority);
3333 memset(&wc->masks.dl_type, 0xff, sizeof wc->masks.dl_type);
3334 if (is_ip_any(flow)) {
3335 wc->masks.nw_frag |= FLOW_NW_FRAG_MASK;
3337 is_icmp = is_icmpv4(flow) || is_icmpv6(flow);
3339 tnl_may_send = tnl_xlate_init(&ctx.base_flow, flow, wc);
3340 if (ctx.xbridge->netflow) {
3341 netflow_mask_wc(flow, wc);
3346 ctx.in_group = false;
3347 ctx.orig_skb_priority = flow->skb_priority;
3350 ctx.use_recirc = false;
3352 if (!xin->ofpacts && !ctx.rule) {
3353 ctx.table_id = rule_dpif_lookup(ctx.xbridge->ofproto, flow,
3354 !xin->skip_wildcards ? wc : NULL,
3355 &rule, ctx.xin->xcache != NULL);
3356 if (ctx.xin->resubmit_stats) {
3357 rule_dpif_credit_stats(rule, ctx.xin->resubmit_stats);
3359 if (ctx.xin->xcache) {
3360 struct xc_entry *entry;
3362 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_RULE);
3363 entry->u.rule = rule;
3367 xout->fail_open = ctx.rule && rule_dpif_is_fail_open(ctx.rule);
3370 ofpacts = xin->ofpacts;
3371 ofpacts_len = xin->ofpacts_len;
3372 } else if (ctx.rule) {
3373 actions = rule_dpif_get_actions(ctx.rule);
3374 ofpacts = actions->ofpacts;
3375 ofpacts_len = actions->ofpacts_len;
3380 ofpbuf_use_stub(&ctx.stack, ctx.init_stack, sizeof ctx.init_stack);
3381 ofpbuf_use_stub(&ctx.action_set,
3382 ctx.action_set_stub, sizeof ctx.action_set_stub);
3384 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
3385 /* Do this conditionally because the copy is expensive enough that it
3386 * shows up in profiles. */
3390 if (flow->nw_frag & FLOW_NW_FRAG_ANY) {
3391 switch (ctx.xbridge->frag) {
3392 case OFPC_FRAG_NORMAL:
3393 /* We must pretend that transport ports are unavailable. */
3394 flow->tp_src = ctx.base_flow.tp_src = htons(0);
3395 flow->tp_dst = ctx.base_flow.tp_dst = htons(0);
3398 case OFPC_FRAG_DROP:
3401 case OFPC_FRAG_REASM:
3404 case OFPC_FRAG_NX_MATCH:
3405 /* Nothing to do. */
3408 case OFPC_INVALID_TTL_TO_CONTROLLER:
3413 in_port = get_ofp_port(ctx.xbridge, flow->in_port.ofp_port);
3414 if (in_port && in_port->is_tunnel) {
3415 if (ctx.xin->resubmit_stats) {
3416 netdev_vport_inc_rx(in_port->netdev, ctx.xin->resubmit_stats);
3418 bfd_account_rx(in_port->bfd, ctx.xin->resubmit_stats);
3421 if (ctx.xin->xcache) {
3422 struct xc_entry *entry;
3424 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_NETDEV);
3425 entry->u.dev.rx = netdev_ref(in_port->netdev);
3426 entry->u.dev.bfd = bfd_ref(in_port->bfd);
3430 special = process_special(&ctx, flow, in_port, ctx.xin->packet);
3432 ctx.xout->slow |= special;
3434 size_t sample_actions_len;
3436 if (flow->in_port.ofp_port
3437 != vsp_realdev_to_vlandev(ctx.xbridge->ofproto,
3438 flow->in_port.ofp_port,
3440 ctx.base_flow.vlan_tci = 0;
3443 add_sflow_action(&ctx);
3444 add_ipfix_action(&ctx);
3445 sample_actions_len = ofpbuf_size(&ctx.xout->odp_actions);
3447 if (tnl_may_send && (!in_port || may_receive(in_port, &ctx))) {
3448 do_xlate_actions(ofpacts, ofpacts_len, &ctx);
3450 /* We've let OFPP_NORMAL and the learning action look at the
3451 * packet, so drop it now if forwarding is disabled. */
3452 if (in_port && !xport_stp_forward_state(in_port)) {
3453 ofpbuf_set_size(&ctx.xout->odp_actions, sample_actions_len);
3457 if (ofpbuf_size(&ctx.action_set)) {
3458 xlate_action_set(&ctx);
3461 if (ctx.xbridge->has_in_band
3462 && in_band_must_output_to_local_port(flow)
3463 && !actions_output_to_local_port(&ctx)) {
3464 compose_output_action(&ctx, OFPP_LOCAL);
3467 fix_sflow_action(&ctx);
3469 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
3470 add_mirror_actions(&ctx, &orig_flow);
3474 if (nl_attr_oversized(ofpbuf_size(&ctx.xout->odp_actions))) {
3475 /* These datapath actions are too big for a Netlink attribute, so we
3476 * can't hand them to the kernel directly. dpif_execute() can execute
3477 * them one by one with help, so just mark the result as SLOW_ACTION to
3478 * prevent the flow from being installed. */
3479 COVERAGE_INC(xlate_actions_oversize);
3480 ctx.xout->slow |= SLOW_ACTION;
3481 } else if (too_many_output_actions(&ctx.xout->odp_actions)) {
3482 COVERAGE_INC(xlate_actions_too_many_output);
3483 ctx.xout->slow |= SLOW_ACTION;
3486 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
3487 if (ctx.xin->resubmit_stats) {
3488 mirror_update_stats(ctx.xbridge->mbridge, xout->mirrors,
3489 ctx.xin->resubmit_stats->n_packets,
3490 ctx.xin->resubmit_stats->n_bytes);
3492 if (ctx.xin->xcache) {
3493 struct xc_entry *entry;
3495 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_MIRROR);
3496 entry->u.mirror.mbridge = mbridge_ref(ctx.xbridge->mbridge);
3497 entry->u.mirror.mirrors = xout->mirrors;
3501 if (ctx.xbridge->netflow) {
3502 /* Only update netflow if we don't have controller flow. We don't
3503 * report NetFlow expiration messages for such facets because they
3504 * are just part of the control logic for the network, not real
3506 if (ofpacts_len == 0
3507 || ofpacts->type != OFPACT_CONTROLLER
3508 || ofpact_next(ofpacts) < ofpact_end(ofpacts, ofpacts_len)) {
3509 if (ctx.xin->resubmit_stats) {
3510 netflow_flow_update(ctx.xbridge->netflow, flow,
3511 xout->nf_output_iface,
3512 ctx.xin->resubmit_stats);
3514 if (ctx.xin->xcache) {
3515 struct xc_entry *entry;
3517 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_NETFLOW);
3518 entry->u.nf.netflow = netflow_ref(ctx.xbridge->netflow);
3519 entry->u.nf.flow = xmemdup(flow, sizeof *flow);
3520 entry->u.nf.iface = xout->nf_output_iface;
3525 ofpbuf_uninit(&ctx.stack);
3526 ofpbuf_uninit(&ctx.action_set);
3528 /* Clear the metadata and register wildcard masks, because we won't
3529 * use non-header fields as part of the cache. */
3530 flow_wildcards_clear_non_packet_fields(wc);
3532 /* ICMPv4 and ICMPv6 have 8-bit "type" and "code" fields. struct flow uses
3533 * the low 8 bits of the 16-bit tp_src and tp_dst members to represent
3534 * these fields. The datapath interface, on the other hand, represents
3535 * them with just 8 bits each. This means that if the high 8 bits of the
3536 * masks for these fields somehow become set, then they will get chopped
3537 * off by a round trip through the datapath, and revalidation will spot
3538 * that as an inconsistency and delete the flow. Avoid the problem here by
3539 * making sure that only the low 8 bits of either field can be unwildcarded
3543 wc->masks.tp_src &= htons(UINT8_MAX);
3544 wc->masks.tp_dst &= htons(UINT8_MAX);
3548 /* Sends 'packet' out 'ofport'.
3549 * May modify 'packet'.
3550 * Returns 0 if successful, otherwise a positive errno value. */
3552 xlate_send_packet(const struct ofport_dpif *ofport, struct ofpbuf *packet)
3554 struct xport *xport;
3555 struct ofpact_output output;
3558 ofpact_init(&output.ofpact, OFPACT_OUTPUT, sizeof output);
3559 /* Use OFPP_NONE as the in_port to avoid special packet processing. */
3560 flow_extract(packet, NULL, &flow);
3561 flow.in_port.ofp_port = OFPP_NONE;
3563 ovs_rwlock_rdlock(&xlate_rwlock);
3564 xport = xport_lookup(ofport);
3566 ovs_rwlock_unlock(&xlate_rwlock);
3569 output.port = xport->ofp_port;
3571 ovs_rwlock_unlock(&xlate_rwlock);
3573 return ofproto_dpif_execute_actions(xport->xbridge->ofproto, &flow, NULL,
3574 &output.ofpact, sizeof output,
3578 struct xlate_cache *
3579 xlate_cache_new(void)
3581 struct xlate_cache *xcache = xmalloc(sizeof *xcache);
3583 ofpbuf_init(&xcache->entries, 512);
3587 static struct xc_entry *
3588 xlate_cache_add_entry(struct xlate_cache *xcache, enum xc_type type)
3590 struct xc_entry *entry;
3592 entry = ofpbuf_put_zeros(&xcache->entries, sizeof *entry);
3599 xlate_cache_netdev(struct xc_entry *entry, const struct dpif_flow_stats *stats)
3601 if (entry->u.dev.tx) {
3602 netdev_vport_inc_tx(entry->u.dev.tx, stats);
3604 if (entry->u.dev.rx) {
3605 netdev_vport_inc_rx(entry->u.dev.rx, stats);
3607 if (entry->u.dev.bfd) {
3608 bfd_account_rx(entry->u.dev.bfd, stats);
3613 xlate_cache_normal(struct ofproto_dpif *ofproto, struct flow *flow, int vlan)
3615 struct xbridge *xbridge;
3616 struct xbundle *xbundle;
3617 struct flow_wildcards wc;
3619 xbridge = xbridge_lookup(ofproto);
3624 xbundle = lookup_input_bundle(xbridge, flow->in_port.ofp_port, false,
3630 update_learning_table(xbridge, flow, &wc, vlan, xbundle);
3633 /* Push stats and perform side effects of flow translation. */
3635 xlate_push_stats(struct xlate_cache *xcache, bool may_learn,
3636 const struct dpif_flow_stats *stats)
3638 struct xc_entry *entry;
3639 struct ofpbuf entries = xcache->entries;
3641 XC_ENTRY_FOR_EACH (entry, entries, xcache) {
3642 switch (entry->type) {
3644 rule_dpif_credit_stats(entry->u.rule, stats);
3647 bond_account(entry->u.bond.bond, entry->u.bond.flow,
3648 entry->u.bond.vid, stats->n_bytes);
3651 xlate_cache_netdev(entry, stats);
3654 netflow_flow_update(entry->u.nf.netflow, entry->u.nf.flow,
3655 entry->u.nf.iface, stats);
3658 mirror_update_stats(entry->u.mirror.mbridge,
3659 entry->u.mirror.mirrors,
3660 stats->n_packets, stats->n_bytes);
3664 ofproto_dpif_flow_mod(entry->u.learn.ofproto,
3669 xlate_cache_normal(entry->u.normal.ofproto, entry->u.normal.flow,
3670 entry->u.normal.vlan);
3672 case XC_FIN_TIMEOUT:
3673 xlate_fin_timeout__(entry->u.fin.rule, stats->tcp_flags,
3674 entry->u.fin.idle, entry->u.fin.hard);
3683 xlate_dev_unref(struct xc_entry *entry)
3685 if (entry->u.dev.tx) {
3686 netdev_close(entry->u.dev.tx);
3688 if (entry->u.dev.rx) {
3689 netdev_close(entry->u.dev.rx);
3691 if (entry->u.dev.bfd) {
3692 bfd_unref(entry->u.dev.bfd);
3697 xlate_cache_clear_netflow(struct netflow *netflow, struct flow *flow)
3699 netflow_flow_clear(netflow, flow);
3700 netflow_unref(netflow);
3705 xlate_cache_clear(struct xlate_cache *xcache)
3707 struct xc_entry *entry;
3708 struct ofpbuf entries;
3714 XC_ENTRY_FOR_EACH (entry, entries, xcache) {
3715 switch (entry->type) {
3717 rule_dpif_unref(entry->u.rule);
3720 free(entry->u.bond.flow);
3721 bond_unref(entry->u.bond.bond);
3724 xlate_dev_unref(entry);
3727 xlate_cache_clear_netflow(entry->u.nf.netflow, entry->u.nf.flow);
3730 mbridge_unref(entry->u.mirror.mbridge);
3733 free(entry->u.learn.fm);
3734 ofpbuf_delete(entry->u.learn.ofpacts);
3737 free(entry->u.normal.flow);
3739 case XC_FIN_TIMEOUT:
3740 /* 'u.fin.rule' is always already held as a XC_RULE, which
3741 * has already released it's reference above. */
3748 ofpbuf_clear(&xcache->entries);
3752 xlate_cache_delete(struct xlate_cache *xcache)
3754 xlate_cache_clear(xcache);
3755 ofpbuf_uninit(&xcache->entries);