1 /* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License. */
17 #include "ofproto/ofproto-dpif-xlate.h"
25 #include "byte-order.h"
30 #include "dynamic-string.h"
35 #include "mac-learning.h"
36 #include "meta-flow.h"
37 #include "multipath.h"
38 #include "netdev-vport.h"
41 #include "odp-execute.h"
42 #include "ofp-actions.h"
43 #include "ofproto/ofproto-dpif-ipfix.h"
44 #include "ofproto/ofproto-dpif-mirror.h"
45 #include "ofproto/ofproto-dpif-monitor.h"
46 #include "ofproto/ofproto-dpif-sflow.h"
47 #include "ofproto/ofproto-dpif.h"
48 #include "ofproto/ofproto-provider.h"
52 COVERAGE_DEFINE(xlate_actions);
53 COVERAGE_DEFINE(xlate_actions_oversize);
54 COVERAGE_DEFINE(xlate_actions_mpls_overflow);
56 VLOG_DEFINE_THIS_MODULE(ofproto_dpif_xlate);
58 /* Maximum depth of flow table recursion (due to resubmit actions) in a
59 * flow translation. */
60 #define MAX_RESUBMIT_RECURSION 64
61 #define MAX_INTERNAL_RESUBMITS 1 /* Max resbmits allowed using rules in
64 /* Maximum number of resubmit actions in a flow translation, whether they are
65 * recursive or not. */
66 #define MAX_RESUBMITS (MAX_RESUBMIT_RECURSION * MAX_RESUBMIT_RECURSION)
68 struct ovs_rwlock xlate_rwlock = OVS_RWLOCK_INITIALIZER;
71 struct hmap_node hmap_node; /* Node in global 'xbridges' map. */
72 struct ofproto_dpif *ofproto; /* Key in global 'xbridges' map. */
74 struct list xbundles; /* Owned xbundles. */
75 struct hmap xports; /* Indexed by ofp_port. */
77 char *name; /* Name used in log messages. */
78 struct dpif *dpif; /* Datapath interface. */
79 struct mac_learning *ml; /* Mac learning handle. */
80 struct mbridge *mbridge; /* Mirroring. */
81 struct dpif_sflow *sflow; /* SFlow handle, or null. */
82 struct dpif_ipfix *ipfix; /* Ipfix handle, or null. */
83 struct netflow *netflow; /* Netflow handle, or null. */
84 struct stp *stp; /* STP or null if disabled. */
86 /* Special rules installed by ofproto-dpif. */
87 struct rule_dpif *miss_rule;
88 struct rule_dpif *no_packet_in_rule;
90 enum ofp_config_flags frag; /* Fragmentation handling. */
91 bool has_in_band; /* Bridge has in band control? */
92 bool forward_bpdu; /* Bridge forwards STP BPDUs? */
94 /* True if the datapath supports recirculation. */
97 /* True if the datapath supports variable-length
98 * OVS_USERSPACE_ATTR_USERDATA in OVS_ACTION_ATTR_USERSPACE actions.
99 * False if the datapath supports only 8-byte (or shorter) userdata. */
100 bool variable_length_userdata;
102 /* Number of MPLS label stack entries that the datapath supports
104 size_t max_mpls_depth;
108 struct hmap_node hmap_node; /* In global 'xbundles' map. */
109 struct ofbundle *ofbundle; /* Key in global 'xbundles' map. */
111 struct list list_node; /* In parent 'xbridges' list. */
112 struct xbridge *xbridge; /* Parent xbridge. */
114 struct list xports; /* Contains "struct xport"s. */
116 char *name; /* Name used in log messages. */
117 struct bond *bond; /* Nonnull iff more than one port. */
118 struct lacp *lacp; /* LACP handle or null. */
120 enum port_vlan_mode vlan_mode; /* VLAN mode. */
121 int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */
122 unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1.
123 * NULL if all VLANs are trunked. */
124 bool use_priority_tags; /* Use 802.1p tag for frames in VLAN 0? */
125 bool floodable; /* No port has OFPUTIL_PC_NO_FLOOD set? */
129 struct hmap_node hmap_node; /* Node in global 'xports' map. */
130 struct ofport_dpif *ofport; /* Key in global 'xports map. */
132 struct hmap_node ofp_node; /* Node in parent xbridge 'xports' map. */
133 ofp_port_t ofp_port; /* Key in parent xbridge 'xports' map. */
135 odp_port_t odp_port; /* Datapath port number or ODPP_NONE. */
137 struct list bundle_node; /* In parent xbundle (if it exists). */
138 struct xbundle *xbundle; /* Parent xbundle or null. */
140 struct netdev *netdev; /* 'ofport''s netdev. */
142 struct xbridge *xbridge; /* Parent bridge. */
143 struct xport *peer; /* Patch port peer or null. */
145 enum ofputil_port_config config; /* OpenFlow port configuration. */
146 enum ofputil_port_state state; /* OpenFlow port state. */
147 int stp_port_no; /* STP port number or -1 if not in use. */
149 struct hmap skb_priorities; /* Map of 'skb_priority_to_dscp's. */
151 bool may_enable; /* May be enabled in bonds. */
152 bool is_tunnel; /* Is a tunnel port. */
154 struct cfm *cfm; /* CFM handle or null. */
155 struct bfd *bfd; /* BFD handle or null. */
159 struct xlate_in *xin;
160 struct xlate_out *xout;
162 const struct xbridge *xbridge;
164 /* Flow at the last commit. */
165 struct flow base_flow;
167 /* Tunnel IP destination address as received. This is stored separately
168 * as the base_flow.tunnel is cleared on init to reflect the datapath
169 * behavior. Used to make sure not to send tunneled output to ourselves,
170 * which might lead to an infinite loop. This could happen easily
171 * if a tunnel is marked as 'ip_remote=flow', and the flow does not
172 * actually set the tun_dst field. */
173 ovs_be32 orig_tunnel_ip_dst;
175 /* Stack for the push and pop actions. Each stack element is of type
176 * "union mf_subvalue". */
177 union mf_subvalue init_stack[1024 / sizeof(union mf_subvalue)];
180 /* The rule that we are currently translating, or NULL. */
181 struct rule_dpif *rule;
183 /* Resubmit statistics, via xlate_table_action(). */
184 int recurse; /* Current resubmit nesting depth. */
185 int resubmits; /* Total number of resubmits. */
186 bool in_group; /* Currently translating ofgroup, if true. */
188 uint32_t orig_skb_priority; /* Priority when packet arrived. */
189 uint8_t table_id; /* OpenFlow table ID where flow was found. */
190 uint32_t sflow_n_outputs; /* Number of output ports. */
191 odp_port_t sflow_odp_port; /* Output port for composing sFlow action. */
192 uint16_t user_cookie_offset;/* Used for user_action_cookie fixup. */
193 bool exit; /* No further actions should be processed. */
195 /* OpenFlow 1.1+ action set.
197 * 'action_set' accumulates "struct ofpact"s added by OFPACT_WRITE_ACTIONS.
198 * When translation is otherwise complete, ofpacts_execute_action_set()
199 * converts it to a set of "struct ofpact"s that can be translated into
200 * datapath actions. */
201 struct ofpbuf action_set; /* Action set. */
202 uint64_t action_set_stub[1024 / 8];
205 /* A controller may use OFPP_NONE as the ingress port to indicate that
206 * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for
207 * when an input bundle is needed for validation (e.g., mirroring or
208 * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have
209 * any 'port' structs, so care must be taken when dealing with it. */
210 static struct xbundle ofpp_none_bundle = {
212 .vlan_mode = PORT_VLAN_TRUNK
215 /* Node in 'xport''s 'skb_priorities' map. Used to maintain a map from
216 * 'priority' (the datapath's term for QoS queue) to the dscp bits which all
217 * traffic egressing the 'ofport' with that priority should be marked with. */
218 struct skb_priority_to_dscp {
219 struct hmap_node hmap_node; /* Node in 'ofport_dpif''s 'skb_priorities'. */
220 uint32_t skb_priority; /* Priority of this queue (see struct flow). */
222 uint8_t dscp; /* DSCP bits to mark outgoing traffic with. */
236 /* xlate_cache entries hold enough information to perform the side effects of
237 * xlate_actions() for a rule, without needing to perform rule translation
238 * from scratch. The primary usage of these is to submit statistics to objects
239 * that a flow relates to, although they may be used for other effects as well
240 * (for instance, refreshing hard timeouts for learned flows). */
244 struct rule_dpif *rule;
251 struct netflow *netflow;
256 struct mbridge *mbridge;
257 mirror_mask_t mirrors;
265 struct ofproto_dpif *ofproto;
266 struct rule_dpif *rule;
269 struct ofproto_dpif *ofproto;
274 struct rule_dpif *rule;
281 #define XC_ENTRY_FOR_EACH(entry, entries, xcache) \
282 entries = xcache->entries; \
283 for (entry = ofpbuf_try_pull(&entries, sizeof *entry); \
285 entry = ofpbuf_try_pull(&entries, sizeof *entry))
288 struct ofpbuf entries;
291 static struct hmap xbridges = HMAP_INITIALIZER(&xbridges);
292 static struct hmap xbundles = HMAP_INITIALIZER(&xbundles);
293 static struct hmap xports = HMAP_INITIALIZER(&xports);
295 static bool may_receive(const struct xport *, struct xlate_ctx *);
296 static void do_xlate_actions(const struct ofpact *, size_t ofpacts_len,
298 static void xlate_actions__(struct xlate_in *, struct xlate_out *)
299 OVS_REQ_RDLOCK(xlate_rwlock);
300 static void xlate_normal(struct xlate_ctx *);
301 static void xlate_report(struct xlate_ctx *, const char *);
302 static void xlate_table_action(struct xlate_ctx *, ofp_port_t in_port,
303 uint8_t table_id, bool may_packet_in,
304 bool honor_table_miss);
305 static bool input_vid_is_valid(uint16_t vid, struct xbundle *, bool warn);
306 static uint16_t input_vid_to_vlan(const struct xbundle *, uint16_t vid);
307 static void output_normal(struct xlate_ctx *, const struct xbundle *,
309 static void compose_output_action(struct xlate_ctx *, ofp_port_t ofp_port);
311 static struct xbridge *xbridge_lookup(const struct ofproto_dpif *);
312 static struct xbundle *xbundle_lookup(const struct ofbundle *);
313 static struct xport *xport_lookup(const struct ofport_dpif *);
314 static struct xport *get_ofp_port(const struct xbridge *, ofp_port_t ofp_port);
315 static struct skb_priority_to_dscp *get_skb_priority(const struct xport *,
316 uint32_t skb_priority);
317 static void clear_skb_priorities(struct xport *);
318 static bool dscp_from_skb_priority(const struct xport *, uint32_t skb_priority,
321 static struct xc_entry *xlate_cache_add_entry(struct xlate_cache *xc,
325 xlate_ofproto_set(struct ofproto_dpif *ofproto, const char *name,
326 struct dpif *dpif, struct rule_dpif *miss_rule,
327 struct rule_dpif *no_packet_in_rule,
328 const struct mac_learning *ml, struct stp *stp,
329 const struct mbridge *mbridge,
330 const struct dpif_sflow *sflow,
331 const struct dpif_ipfix *ipfix,
332 const struct netflow *netflow, enum ofp_config_flags frag,
333 bool forward_bpdu, bool has_in_band,
335 bool variable_length_userdata,
336 size_t max_mpls_depth)
338 struct xbridge *xbridge = xbridge_lookup(ofproto);
341 xbridge = xzalloc(sizeof *xbridge);
342 xbridge->ofproto = ofproto;
344 hmap_insert(&xbridges, &xbridge->hmap_node, hash_pointer(ofproto, 0));
345 hmap_init(&xbridge->xports);
346 list_init(&xbridge->xbundles);
349 if (xbridge->ml != ml) {
350 mac_learning_unref(xbridge->ml);
351 xbridge->ml = mac_learning_ref(ml);
354 if (xbridge->mbridge != mbridge) {
355 mbridge_unref(xbridge->mbridge);
356 xbridge->mbridge = mbridge_ref(mbridge);
359 if (xbridge->sflow != sflow) {
360 dpif_sflow_unref(xbridge->sflow);
361 xbridge->sflow = dpif_sflow_ref(sflow);
364 if (xbridge->ipfix != ipfix) {
365 dpif_ipfix_unref(xbridge->ipfix);
366 xbridge->ipfix = dpif_ipfix_ref(ipfix);
369 if (xbridge->stp != stp) {
370 stp_unref(xbridge->stp);
371 xbridge->stp = stp_ref(stp);
374 if (xbridge->netflow != netflow) {
375 netflow_unref(xbridge->netflow);
376 xbridge->netflow = netflow_ref(netflow);
380 xbridge->name = xstrdup(name);
382 xbridge->dpif = dpif;
383 xbridge->forward_bpdu = forward_bpdu;
384 xbridge->has_in_band = has_in_band;
385 xbridge->frag = frag;
386 xbridge->miss_rule = miss_rule;
387 xbridge->no_packet_in_rule = no_packet_in_rule;
388 xbridge->enable_recirc = enable_recirc;
389 xbridge->variable_length_userdata = variable_length_userdata;
390 xbridge->max_mpls_depth = max_mpls_depth;
394 xlate_remove_ofproto(struct ofproto_dpif *ofproto)
396 struct xbridge *xbridge = xbridge_lookup(ofproto);
397 struct xbundle *xbundle, *next_xbundle;
398 struct xport *xport, *next_xport;
404 HMAP_FOR_EACH_SAFE (xport, next_xport, ofp_node, &xbridge->xports) {
405 xlate_ofport_remove(xport->ofport);
408 LIST_FOR_EACH_SAFE (xbundle, next_xbundle, list_node, &xbridge->xbundles) {
409 xlate_bundle_remove(xbundle->ofbundle);
412 hmap_remove(&xbridges, &xbridge->hmap_node);
413 mac_learning_unref(xbridge->ml);
414 mbridge_unref(xbridge->mbridge);
415 dpif_sflow_unref(xbridge->sflow);
416 dpif_ipfix_unref(xbridge->ipfix);
417 stp_unref(xbridge->stp);
418 hmap_destroy(&xbridge->xports);
424 xlate_bundle_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
425 const char *name, enum port_vlan_mode vlan_mode, int vlan,
426 unsigned long *trunks, bool use_priority_tags,
427 const struct bond *bond, const struct lacp *lacp,
430 struct xbundle *xbundle = xbundle_lookup(ofbundle);
433 xbundle = xzalloc(sizeof *xbundle);
434 xbundle->ofbundle = ofbundle;
435 xbundle->xbridge = xbridge_lookup(ofproto);
437 hmap_insert(&xbundles, &xbundle->hmap_node, hash_pointer(ofbundle, 0));
438 list_insert(&xbundle->xbridge->xbundles, &xbundle->list_node);
439 list_init(&xbundle->xports);
442 ovs_assert(xbundle->xbridge);
445 xbundle->name = xstrdup(name);
447 xbundle->vlan_mode = vlan_mode;
448 xbundle->vlan = vlan;
449 xbundle->trunks = trunks;
450 xbundle->use_priority_tags = use_priority_tags;
451 xbundle->floodable = floodable;
453 if (xbundle->bond != bond) {
454 bond_unref(xbundle->bond);
455 xbundle->bond = bond_ref(bond);
458 if (xbundle->lacp != lacp) {
459 lacp_unref(xbundle->lacp);
460 xbundle->lacp = lacp_ref(lacp);
465 xlate_bundle_remove(struct ofbundle *ofbundle)
467 struct xbundle *xbundle = xbundle_lookup(ofbundle);
468 struct xport *xport, *next;
474 LIST_FOR_EACH_SAFE (xport, next, bundle_node, &xbundle->xports) {
475 list_remove(&xport->bundle_node);
476 xport->xbundle = NULL;
479 hmap_remove(&xbundles, &xbundle->hmap_node);
480 list_remove(&xbundle->list_node);
481 bond_unref(xbundle->bond);
482 lacp_unref(xbundle->lacp);
488 xlate_ofport_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
489 struct ofport_dpif *ofport, ofp_port_t ofp_port,
490 odp_port_t odp_port, const struct netdev *netdev,
491 const struct cfm *cfm, const struct bfd *bfd,
492 struct ofport_dpif *peer, int stp_port_no,
493 const struct ofproto_port_queue *qdscp_list, size_t n_qdscp,
494 enum ofputil_port_config config,
495 enum ofputil_port_state state, bool is_tunnel,
498 struct xport *xport = xport_lookup(ofport);
502 xport = xzalloc(sizeof *xport);
503 xport->ofport = ofport;
504 xport->xbridge = xbridge_lookup(ofproto);
505 xport->ofp_port = ofp_port;
507 hmap_init(&xport->skb_priorities);
508 hmap_insert(&xports, &xport->hmap_node, hash_pointer(ofport, 0));
509 hmap_insert(&xport->xbridge->xports, &xport->ofp_node,
510 hash_ofp_port(xport->ofp_port));
513 ovs_assert(xport->ofp_port == ofp_port);
515 xport->config = config;
516 xport->state = state;
517 xport->stp_port_no = stp_port_no;
518 xport->is_tunnel = is_tunnel;
519 xport->may_enable = may_enable;
520 xport->odp_port = odp_port;
522 if (xport->netdev != netdev) {
523 netdev_close(xport->netdev);
524 xport->netdev = netdev_ref(netdev);
527 if (xport->cfm != cfm) {
528 cfm_unref(xport->cfm);
529 xport->cfm = cfm_ref(cfm);
532 if (xport->bfd != bfd) {
533 bfd_unref(xport->bfd);
534 xport->bfd = bfd_ref(bfd);
538 xport->peer->peer = NULL;
540 xport->peer = xport_lookup(peer);
542 xport->peer->peer = xport;
545 if (xport->xbundle) {
546 list_remove(&xport->bundle_node);
548 xport->xbundle = xbundle_lookup(ofbundle);
549 if (xport->xbundle) {
550 list_insert(&xport->xbundle->xports, &xport->bundle_node);
553 clear_skb_priorities(xport);
554 for (i = 0; i < n_qdscp; i++) {
555 struct skb_priority_to_dscp *pdscp;
556 uint32_t skb_priority;
558 if (dpif_queue_to_priority(xport->xbridge->dpif, qdscp_list[i].queue,
563 pdscp = xmalloc(sizeof *pdscp);
564 pdscp->skb_priority = skb_priority;
565 pdscp->dscp = (qdscp_list[i].dscp << 2) & IP_DSCP_MASK;
566 hmap_insert(&xport->skb_priorities, &pdscp->hmap_node,
567 hash_int(pdscp->skb_priority, 0));
572 xlate_ofport_remove(struct ofport_dpif *ofport)
574 struct xport *xport = xport_lookup(ofport);
581 xport->peer->peer = NULL;
585 if (xport->xbundle) {
586 list_remove(&xport->bundle_node);
589 clear_skb_priorities(xport);
590 hmap_destroy(&xport->skb_priorities);
592 hmap_remove(&xports, &xport->hmap_node);
593 hmap_remove(&xport->xbridge->xports, &xport->ofp_node);
595 netdev_close(xport->netdev);
596 cfm_unref(xport->cfm);
597 bfd_unref(xport->bfd);
601 /* Given a datpath, packet, and flow metadata ('backer', 'packet', and 'key'
602 * respectively), populates 'flow' with the result of odp_flow_key_to_flow().
603 * Optionally populates 'ofproto' with the ofproto_dpif, 'odp_in_port' with
604 * the datapath in_port, that 'packet' ingressed, and 'ipfix', 'sflow', and
605 * 'netflow' with the appropriate handles for those protocols if they're
606 * enabled. Caller is responsible for unrefing them.
608 * If 'ofproto' is nonnull, requires 'flow''s in_port to exist. Otherwise sets
609 * 'flow''s in_port to OFPP_NONE.
611 * This function does post-processing on data returned from
612 * odp_flow_key_to_flow() to help make VLAN splinters transparent to the rest
613 * of the upcall processing logic. In particular, if the extracted in_port is
614 * a VLAN splinter port, it replaces flow->in_port by the "real" port, sets
615 * flow->vlan_tci correctly for the VLAN of the VLAN splinter port, and pushes
616 * a VLAN header onto 'packet' (if it is nonnull).
618 * Similarly, this function also includes some logic to help with tunnels. It
619 * may modify 'flow' as necessary to make the tunneling implementation
620 * transparent to the upcall processing logic.
622 * Returns 0 if successful, ENODEV if the parsed flow has no associated ofport,
623 * or some other positive errno if there are other problems. */
625 xlate_receive(const struct dpif_backer *backer, struct ofpbuf *packet,
626 const struct nlattr *key, size_t key_len, struct flow *flow,
627 struct ofproto_dpif **ofproto, struct dpif_ipfix **ipfix,
628 struct dpif_sflow **sflow, struct netflow **netflow,
629 odp_port_t *odp_in_port)
631 const struct xport *xport;
634 ovs_rwlock_rdlock(&xlate_rwlock);
635 if (odp_flow_key_to_flow(key, key_len, flow) == ODP_FIT_ERROR) {
641 *odp_in_port = flow->in_port.odp_port;
644 xport = xport_lookup(tnl_port_should_receive(flow)
645 ? tnl_port_receive(flow)
646 : odp_port_to_ofport(backer, flow->in_port.odp_port));
648 flow->in_port.ofp_port = xport ? xport->ofp_port : OFPP_NONE;
653 if (vsp_adjust_flow(xport->xbridge->ofproto, flow)) {
655 /* Make the packet resemble the flow, so that it gets sent to
656 * an OpenFlow controller properly, so that it looks correct
657 * for sFlow, and so that flow_extract() will get the correct
658 * vlan_tci if it is called on 'packet'. */
659 eth_push_vlan(packet, htons(ETH_TYPE_VLAN), flow->vlan_tci);
665 *ofproto = xport->xbridge->ofproto;
669 *ipfix = dpif_ipfix_ref(xport->xbridge->ipfix);
673 *sflow = dpif_sflow_ref(xport->xbridge->sflow);
677 *netflow = netflow_ref(xport->xbridge->netflow);
681 ovs_rwlock_unlock(&xlate_rwlock);
685 static struct xbridge *
686 xbridge_lookup(const struct ofproto_dpif *ofproto)
688 struct xbridge *xbridge;
694 HMAP_FOR_EACH_IN_BUCKET (xbridge, hmap_node, hash_pointer(ofproto, 0),
696 if (xbridge->ofproto == ofproto) {
703 static struct xbundle *
704 xbundle_lookup(const struct ofbundle *ofbundle)
706 struct xbundle *xbundle;
712 HMAP_FOR_EACH_IN_BUCKET (xbundle, hmap_node, hash_pointer(ofbundle, 0),
714 if (xbundle->ofbundle == ofbundle) {
721 static struct xport *
722 xport_lookup(const struct ofport_dpif *ofport)
730 HMAP_FOR_EACH_IN_BUCKET (xport, hmap_node, hash_pointer(ofport, 0),
732 if (xport->ofport == ofport) {
739 static struct stp_port *
740 xport_get_stp_port(const struct xport *xport)
742 return xport->xbridge->stp && xport->stp_port_no != -1
743 ? stp_get_port(xport->xbridge->stp, xport->stp_port_no)
748 xport_stp_learn_state(const struct xport *xport)
750 struct stp_port *sp = xport_get_stp_port(xport);
751 return stp_learn_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
755 xport_stp_forward_state(const struct xport *xport)
757 struct stp_port *sp = xport_get_stp_port(xport);
758 return stp_forward_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
762 xport_stp_listen_state(const struct xport *xport)
764 struct stp_port *sp = xport_get_stp_port(xport);
765 return stp_listen_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
768 /* Returns true if STP should process 'flow'. Sets fields in 'wc' that
769 * were used to make the determination.*/
771 stp_should_process_flow(const struct flow *flow, struct flow_wildcards *wc)
773 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
774 return eth_addr_equals(flow->dl_dst, eth_addr_stp);
778 stp_process_packet(const struct xport *xport, const struct ofpbuf *packet)
780 struct stp_port *sp = xport_get_stp_port(xport);
781 struct ofpbuf payload = *packet;
782 struct eth_header *eth = ofpbuf_data(&payload);
784 /* Sink packets on ports that have STP disabled when the bridge has
786 if (!sp || stp_port_get_state(sp) == STP_DISABLED) {
790 /* Trim off padding on payload. */
791 if (ofpbuf_size(&payload) > ntohs(eth->eth_type) + ETH_HEADER_LEN) {
792 ofpbuf_set_size(&payload, ntohs(eth->eth_type) + ETH_HEADER_LEN);
795 if (ofpbuf_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) {
796 stp_received_bpdu(sp, ofpbuf_data(&payload), ofpbuf_size(&payload));
800 static struct xport *
801 get_ofp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
805 HMAP_FOR_EACH_IN_BUCKET (xport, ofp_node, hash_ofp_port(ofp_port),
807 if (xport->ofp_port == ofp_port) {
815 ofp_port_to_odp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
817 const struct xport *xport = get_ofp_port(xbridge, ofp_port);
818 return xport ? xport->odp_port : ODPP_NONE;
822 odp_port_is_alive(const struct xlate_ctx *ctx, ofp_port_t ofp_port)
826 xport = get_ofp_port(ctx->xbridge, ofp_port);
827 if (!xport || xport->config & OFPUTIL_PC_PORT_DOWN ||
828 xport->state & OFPUTIL_PS_LINK_DOWN) {
835 static const struct ofputil_bucket *
836 group_first_live_bucket(const struct xlate_ctx *, const struct group_dpif *,
840 group_is_alive(const struct xlate_ctx *ctx, uint32_t group_id, int depth)
842 struct group_dpif *group;
845 hit = group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group);
850 hit = group_first_live_bucket(ctx, group, depth) != NULL;
852 group_dpif_release(group);
856 #define MAX_LIVENESS_RECURSION 128 /* Arbitrary limit */
859 bucket_is_alive(const struct xlate_ctx *ctx,
860 const struct ofputil_bucket *bucket, int depth)
862 if (depth >= MAX_LIVENESS_RECURSION) {
863 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
865 VLOG_WARN_RL(&rl, "bucket chaining exceeded %d links",
866 MAX_LIVENESS_RECURSION);
870 return !ofputil_bucket_has_liveness(bucket) ||
871 (bucket->watch_port != OFPP_ANY &&
872 odp_port_is_alive(ctx, bucket->watch_port)) ||
873 (bucket->watch_group != OFPG_ANY &&
874 group_is_alive(ctx, bucket->watch_group, depth + 1));
877 static const struct ofputil_bucket *
878 group_first_live_bucket(const struct xlate_ctx *ctx,
879 const struct group_dpif *group, int depth)
881 struct ofputil_bucket *bucket;
882 const struct list *buckets;
884 group_dpif_get_buckets(group, &buckets);
885 LIST_FOR_EACH (bucket, list_node, buckets) {
886 if (bucket_is_alive(ctx, bucket, depth)) {
894 static const struct ofputil_bucket *
895 group_best_live_bucket(const struct xlate_ctx *ctx,
896 const struct group_dpif *group,
899 const struct ofputil_bucket *best_bucket = NULL;
900 uint32_t best_score = 0;
903 const struct ofputil_bucket *bucket;
904 const struct list *buckets;
906 group_dpif_get_buckets(group, &buckets);
907 LIST_FOR_EACH (bucket, list_node, buckets) {
908 if (bucket_is_alive(ctx, bucket, 0)) {
909 uint32_t score = (hash_int(i, basis) & 0xffff) * bucket->weight;
910 if (score >= best_score) {
911 best_bucket = bucket;
922 xbundle_trunks_vlan(const struct xbundle *bundle, uint16_t vlan)
924 return (bundle->vlan_mode != PORT_VLAN_ACCESS
925 && (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan)));
929 xbundle_includes_vlan(const struct xbundle *xbundle, uint16_t vlan)
931 return vlan == xbundle->vlan || xbundle_trunks_vlan(xbundle, vlan);
935 xbundle_mirror_out(const struct xbridge *xbridge, struct xbundle *xbundle)
937 return xbundle != &ofpp_none_bundle
938 ? mirror_bundle_out(xbridge->mbridge, xbundle->ofbundle)
943 xbundle_mirror_src(const struct xbridge *xbridge, struct xbundle *xbundle)
945 return xbundle != &ofpp_none_bundle
946 ? mirror_bundle_src(xbridge->mbridge, xbundle->ofbundle)
951 xbundle_mirror_dst(const struct xbridge *xbridge, struct xbundle *xbundle)
953 return xbundle != &ofpp_none_bundle
954 ? mirror_bundle_dst(xbridge->mbridge, xbundle->ofbundle)
958 static struct xbundle *
959 lookup_input_bundle(const struct xbridge *xbridge, ofp_port_t in_port,
960 bool warn, struct xport **in_xportp)
964 /* Find the port and bundle for the received packet. */
965 xport = get_ofp_port(xbridge, in_port);
969 if (xport && xport->xbundle) {
970 return xport->xbundle;
973 /* Special-case OFPP_NONE, which a controller may use as the ingress
974 * port for traffic that it is sourcing. */
975 if (in_port == OFPP_NONE) {
976 return &ofpp_none_bundle;
979 /* Odd. A few possible reasons here:
981 * - We deleted a port but there are still a few packets queued up
984 * - Someone externally added a port (e.g. "ovs-dpctl add-if") that
985 * we don't know about.
987 * - The ofproto client didn't configure the port as part of a bundle.
988 * This is particularly likely to happen if a packet was received on the
989 * port after it was created, but before the client had a chance to
990 * configure its bundle.
993 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
995 VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown "
996 "port %"PRIu16, xbridge->name, in_port);
1002 add_mirror_actions(struct xlate_ctx *ctx, const struct flow *orig_flow)
1004 const struct xbridge *xbridge = ctx->xbridge;
1005 mirror_mask_t mirrors;
1006 struct xbundle *in_xbundle;
1010 mirrors = ctx->xout->mirrors;
1011 ctx->xout->mirrors = 0;
1013 in_xbundle = lookup_input_bundle(xbridge, orig_flow->in_port.ofp_port,
1014 ctx->xin->packet != NULL, NULL);
1018 mirrors |= xbundle_mirror_src(xbridge, in_xbundle);
1020 /* Drop frames on bundles reserved for mirroring. */
1021 if (xbundle_mirror_out(xbridge, in_xbundle)) {
1022 if (ctx->xin->packet != NULL) {
1023 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1024 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
1025 "%s, which is reserved exclusively for mirroring",
1026 ctx->xbridge->name, in_xbundle->name);
1028 ofpbuf_clear(&ctx->xout->odp_actions);
1033 vid = vlan_tci_to_vid(orig_flow->vlan_tci);
1034 if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) {
1037 vlan = input_vid_to_vlan(in_xbundle, vid);
1043 /* Restore the original packet before adding the mirror actions. */
1044 ctx->xin->flow = *orig_flow;
1047 mirror_mask_t dup_mirrors;
1048 struct ofbundle *out;
1049 unsigned long *vlans;
1054 has_mirror = mirror_get(xbridge->mbridge, raw_ctz(mirrors),
1055 &vlans, &dup_mirrors, &out, &out_vlan);
1056 ovs_assert(has_mirror);
1059 ctx->xout->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK);
1061 vlan_mirrored = !vlans || bitmap_is_set(vlans, vlan);
1064 if (!vlan_mirrored) {
1065 mirrors = zero_rightmost_1bit(mirrors);
1069 mirrors &= ~dup_mirrors;
1070 ctx->xout->mirrors |= dup_mirrors;
1072 struct xbundle *out_xbundle = xbundle_lookup(out);
1074 output_normal(ctx, out_xbundle, vlan);
1076 } else if (vlan != out_vlan
1077 && !eth_addr_is_reserved(orig_flow->dl_dst)) {
1078 struct xbundle *xbundle;
1080 LIST_FOR_EACH (xbundle, list_node, &xbridge->xbundles) {
1081 if (xbundle_includes_vlan(xbundle, out_vlan)
1082 && !xbundle_mirror_out(xbridge, xbundle)) {
1083 output_normal(ctx, xbundle, out_vlan);
1090 /* Given 'vid', the VID obtained from the 802.1Q header that was received as
1091 * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle',
1092 * the bundle on which the packet was received, returns the VLAN to which the
1095 * Both 'vid' and the return value are in the range 0...4095. */
1097 input_vid_to_vlan(const struct xbundle *in_xbundle, uint16_t vid)
1099 switch (in_xbundle->vlan_mode) {
1100 case PORT_VLAN_ACCESS:
1101 return in_xbundle->vlan;
1104 case PORT_VLAN_TRUNK:
1107 case PORT_VLAN_NATIVE_UNTAGGED:
1108 case PORT_VLAN_NATIVE_TAGGED:
1109 return vid ? vid : in_xbundle->vlan;
1116 /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'.
1117 * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs
1120 * 'vid' should be the VID obtained from the 802.1Q header that was received as
1121 * part of a packet (specify 0 if there was no 802.1Q header), in the range
1124 input_vid_is_valid(uint16_t vid, struct xbundle *in_xbundle, bool warn)
1126 /* Allow any VID on the OFPP_NONE port. */
1127 if (in_xbundle == &ofpp_none_bundle) {
1131 switch (in_xbundle->vlan_mode) {
1132 case PORT_VLAN_ACCESS:
1135 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1136 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" tagged "
1137 "packet received on port %s configured as VLAN "
1138 "%"PRIu16" access port", vid, in_xbundle->name,
1145 case PORT_VLAN_NATIVE_UNTAGGED:
1146 case PORT_VLAN_NATIVE_TAGGED:
1148 /* Port must always carry its native VLAN. */
1152 case PORT_VLAN_TRUNK:
1153 if (!xbundle_includes_vlan(in_xbundle, vid)) {
1155 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1156 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" packet "
1157 "received on port %s not configured for trunking "
1158 "VLAN %"PRIu16, vid, in_xbundle->name, vid);
1170 /* Given 'vlan', the VLAN that a packet belongs to, and
1171 * 'out_xbundle', a bundle on which the packet is to be output, returns the VID
1172 * that should be included in the 802.1Q header. (If the return value is 0,
1173 * then the 802.1Q header should only be included in the packet if there is a
1176 * Both 'vlan' and the return value are in the range 0...4095. */
1178 output_vlan_to_vid(const struct xbundle *out_xbundle, uint16_t vlan)
1180 switch (out_xbundle->vlan_mode) {
1181 case PORT_VLAN_ACCESS:
1184 case PORT_VLAN_TRUNK:
1185 case PORT_VLAN_NATIVE_TAGGED:
1188 case PORT_VLAN_NATIVE_UNTAGGED:
1189 return vlan == out_xbundle->vlan ? 0 : vlan;
1197 output_normal(struct xlate_ctx *ctx, const struct xbundle *out_xbundle,
1200 ovs_be16 *flow_tci = &ctx->xin->flow.vlan_tci;
1202 ovs_be16 tci, old_tci;
1203 struct xport *xport;
1205 vid = output_vlan_to_vid(out_xbundle, vlan);
1206 if (list_is_empty(&out_xbundle->xports)) {
1207 /* Partially configured bundle with no slaves. Drop the packet. */
1209 } else if (!out_xbundle->bond) {
1210 ctx->xout->use_recirc = false;
1211 xport = CONTAINER_OF(list_front(&out_xbundle->xports), struct xport,
1214 struct ofport_dpif *ofport;
1215 struct xlate_recirc *xr = &ctx->xout->recirc;
1216 struct flow_wildcards *wc = &ctx->xout->wc;
1218 if (ctx->xbridge->enable_recirc) {
1219 ctx->xout->use_recirc = bond_may_recirc(
1220 out_xbundle->bond, &xr->recirc_id, &xr->hash_bias);
1222 if (ctx->xout->use_recirc) {
1223 /* Only TCP mode uses recirculation. */
1224 xr->hash_alg = OVS_HASH_ALG_L4;
1225 bond_update_post_recirc_rules(out_xbundle->bond, false);
1227 /* Recirculation does not require unmasking hash fields. */
1232 ofport = bond_choose_output_slave(out_xbundle->bond,
1233 &ctx->xin->flow, wc, vid);
1234 xport = xport_lookup(ofport);
1237 /* No slaves enabled, so drop packet. */
1241 /* If ctx->xout->use_recirc is set, the main thread will handle stats
1242 * accounting for this bond. */
1243 if (!ctx->xout->use_recirc) {
1244 if (ctx->xin->resubmit_stats) {
1245 bond_account(out_xbundle->bond, &ctx->xin->flow, vid,
1246 ctx->xin->resubmit_stats->n_bytes);
1248 if (ctx->xin->xcache) {
1249 struct xc_entry *entry;
1252 flow = &ctx->xin->flow;
1253 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_BOND);
1254 entry->u.bond.bond = bond_ref(out_xbundle->bond);
1255 entry->u.bond.flow = xmemdup(flow, sizeof *flow);
1256 entry->u.bond.vid = vid;
1261 old_tci = *flow_tci;
1263 if (tci || out_xbundle->use_priority_tags) {
1264 tci |= *flow_tci & htons(VLAN_PCP_MASK);
1266 tci |= htons(VLAN_CFI);
1271 compose_output_action(ctx, xport->ofp_port);
1272 *flow_tci = old_tci;
1275 /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after
1276 * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to
1277 * indicate this; newer upstream kernels use gratuitous ARP requests. */
1279 is_gratuitous_arp(const struct flow *flow, struct flow_wildcards *wc)
1281 if (flow->dl_type != htons(ETH_TYPE_ARP)) {
1285 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1286 if (!eth_addr_is_broadcast(flow->dl_dst)) {
1290 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
1291 if (flow->nw_proto == ARP_OP_REPLY) {
1293 } else if (flow->nw_proto == ARP_OP_REQUEST) {
1294 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
1295 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
1297 return flow->nw_src == flow->nw_dst;
1303 /* Checks whether a MAC learning update is necessary for MAC learning table
1304 * 'ml' given that a packet matching 'flow' was received on 'in_xbundle' in
1307 * Most packets processed through the MAC learning table do not actually
1308 * change it in any way. This function requires only a read lock on the MAC
1309 * learning table, so it is much cheaper in this common case.
1311 * Keep the code here synchronized with that in update_learning_table__()
1314 is_mac_learning_update_needed(const struct mac_learning *ml,
1315 const struct flow *flow,
1316 struct flow_wildcards *wc,
1317 int vlan, struct xbundle *in_xbundle)
1318 OVS_REQ_RDLOCK(ml->rwlock)
1320 struct mac_entry *mac;
1322 if (!mac_learning_may_learn(ml, flow->dl_src, vlan)) {
1326 mac = mac_learning_lookup(ml, flow->dl_src, vlan);
1327 if (!mac || mac_entry_age(ml, mac)) {
1331 if (is_gratuitous_arp(flow, wc)) {
1332 /* We don't want to learn from gratuitous ARP packets that are
1333 * reflected back over bond slaves so we lock the learning table. */
1334 if (!in_xbundle->bond) {
1336 } else if (mac_entry_is_grat_arp_locked(mac)) {
1341 return mac->port.p != in_xbundle->ofbundle;
1345 /* Updates MAC learning table 'ml' given that a packet matching 'flow' was
1346 * received on 'in_xbundle' in 'vlan'.
1348 * This code repeats all the checks in is_mac_learning_update_needed() because
1349 * the lock was released between there and here and thus the MAC learning state
1350 * could have changed.
1352 * Keep the code here synchronized with that in is_mac_learning_update_needed()
1355 update_learning_table__(const struct xbridge *xbridge,
1356 const struct flow *flow, struct flow_wildcards *wc,
1357 int vlan, struct xbundle *in_xbundle)
1358 OVS_REQ_WRLOCK(xbridge->ml->rwlock)
1360 struct mac_entry *mac;
1362 if (!mac_learning_may_learn(xbridge->ml, flow->dl_src, vlan)) {
1366 mac = mac_learning_insert(xbridge->ml, flow->dl_src, vlan);
1367 if (is_gratuitous_arp(flow, wc)) {
1368 /* We don't want to learn from gratuitous ARP packets that are
1369 * reflected back over bond slaves so we lock the learning table. */
1370 if (!in_xbundle->bond) {
1371 mac_entry_set_grat_arp_lock(mac);
1372 } else if (mac_entry_is_grat_arp_locked(mac)) {
1377 if (mac->port.p != in_xbundle->ofbundle) {
1378 /* The log messages here could actually be useful in debugging,
1379 * so keep the rate limit relatively high. */
1380 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
1382 VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
1383 "on port %s in VLAN %d",
1384 xbridge->name, ETH_ADDR_ARGS(flow->dl_src),
1385 in_xbundle->name, vlan);
1387 mac->port.p = in_xbundle->ofbundle;
1388 mac_learning_changed(xbridge->ml);
1393 update_learning_table(const struct xbridge *xbridge,
1394 const struct flow *flow, struct flow_wildcards *wc,
1395 int vlan, struct xbundle *in_xbundle)
1399 /* Don't learn the OFPP_NONE port. */
1400 if (in_xbundle == &ofpp_none_bundle) {
1404 /* First try the common case: no change to MAC learning table. */
1405 ovs_rwlock_rdlock(&xbridge->ml->rwlock);
1406 need_update = is_mac_learning_update_needed(xbridge->ml, flow, wc, vlan,
1408 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1411 /* Slow path: MAC learning table might need an update. */
1412 ovs_rwlock_wrlock(&xbridge->ml->rwlock);
1413 update_learning_table__(xbridge, flow, wc, vlan, in_xbundle);
1414 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1418 /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or
1419 * dropped. Returns true if they may be forwarded, false if they should be
1422 * 'in_port' must be the xport that corresponds to flow->in_port.
1423 * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull).
1425 * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as
1426 * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as
1427 * checked by input_vid_is_valid().
1429 * May also add tags to '*tags', although the current implementation only does
1430 * so in one special case.
1433 is_admissible(struct xlate_ctx *ctx, struct xport *in_port,
1436 struct xbundle *in_xbundle = in_port->xbundle;
1437 const struct xbridge *xbridge = ctx->xbridge;
1438 struct flow *flow = &ctx->xin->flow;
1440 /* Drop frames for reserved multicast addresses
1441 * only if forward_bpdu option is absent. */
1442 if (!xbridge->forward_bpdu && eth_addr_is_reserved(flow->dl_dst)) {
1443 xlate_report(ctx, "packet has reserved destination MAC, dropping");
1447 if (in_xbundle->bond) {
1448 struct mac_entry *mac;
1450 switch (bond_check_admissibility(in_xbundle->bond, in_port->ofport,
1456 xlate_report(ctx, "bonding refused admissibility, dropping");
1459 case BV_DROP_IF_MOVED:
1460 ovs_rwlock_rdlock(&xbridge->ml->rwlock);
1461 mac = mac_learning_lookup(xbridge->ml, flow->dl_src, vlan);
1462 if (mac && mac->port.p != in_xbundle->ofbundle &&
1463 (!is_gratuitous_arp(flow, &ctx->xout->wc)
1464 || mac_entry_is_grat_arp_locked(mac))) {
1465 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1466 xlate_report(ctx, "SLB bond thinks this packet looped back, "
1470 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1479 xlate_normal(struct xlate_ctx *ctx)
1481 struct flow_wildcards *wc = &ctx->xout->wc;
1482 struct flow *flow = &ctx->xin->flow;
1483 struct xbundle *in_xbundle;
1484 struct xport *in_port;
1485 struct mac_entry *mac;
1490 ctx->xout->has_normal = true;
1492 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
1493 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1494 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
1496 in_xbundle = lookup_input_bundle(ctx->xbridge, flow->in_port.ofp_port,
1497 ctx->xin->packet != NULL, &in_port);
1499 xlate_report(ctx, "no input bundle, dropping");
1503 /* Drop malformed frames. */
1504 if (flow->dl_type == htons(ETH_TYPE_VLAN) &&
1505 !(flow->vlan_tci & htons(VLAN_CFI))) {
1506 if (ctx->xin->packet != NULL) {
1507 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1508 VLOG_WARN_RL(&rl, "bridge %s: dropping packet with partial "
1509 "VLAN tag received on port %s",
1510 ctx->xbridge->name, in_xbundle->name);
1512 xlate_report(ctx, "partial VLAN tag, dropping");
1516 /* Drop frames on bundles reserved for mirroring. */
1517 if (xbundle_mirror_out(ctx->xbridge, in_xbundle)) {
1518 if (ctx->xin->packet != NULL) {
1519 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1520 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
1521 "%s, which is reserved exclusively for mirroring",
1522 ctx->xbridge->name, in_xbundle->name);
1524 xlate_report(ctx, "input port is mirror output port, dropping");
1529 vid = vlan_tci_to_vid(flow->vlan_tci);
1530 if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) {
1531 xlate_report(ctx, "disallowed VLAN VID for this input port, dropping");
1534 vlan = input_vid_to_vlan(in_xbundle, vid);
1536 /* Check other admissibility requirements. */
1537 if (in_port && !is_admissible(ctx, in_port, vlan)) {
1541 /* Learn source MAC. */
1542 if (ctx->xin->may_learn) {
1543 update_learning_table(ctx->xbridge, flow, wc, vlan, in_xbundle);
1545 if (ctx->xin->xcache) {
1546 struct xc_entry *entry;
1548 /* Save enough info to update mac learning table later. */
1549 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NORMAL);
1550 entry->u.normal.ofproto = ctx->xin->ofproto;
1551 entry->u.normal.flow = xmemdup(flow, sizeof *flow);
1552 entry->u.normal.vlan = vlan;
1555 /* Determine output bundle. */
1556 ovs_rwlock_rdlock(&ctx->xbridge->ml->rwlock);
1557 mac = mac_learning_lookup(ctx->xbridge->ml, flow->dl_dst, vlan);
1558 mac_port = mac ? mac->port.p : NULL;
1559 ovs_rwlock_unlock(&ctx->xbridge->ml->rwlock);
1562 struct xbundle *mac_xbundle = xbundle_lookup(mac_port);
1563 if (mac_xbundle && mac_xbundle != in_xbundle) {
1564 xlate_report(ctx, "forwarding to learned port");
1565 output_normal(ctx, mac_xbundle, vlan);
1566 } else if (!mac_xbundle) {
1567 xlate_report(ctx, "learned port is unknown, dropping");
1569 xlate_report(ctx, "learned port is input port, dropping");
1572 struct xbundle *xbundle;
1574 xlate_report(ctx, "no learned MAC for destination, flooding");
1575 LIST_FOR_EACH (xbundle, list_node, &ctx->xbridge->xbundles) {
1576 if (xbundle != in_xbundle
1577 && xbundle_includes_vlan(xbundle, vlan)
1578 && xbundle->floodable
1579 && !xbundle_mirror_out(ctx->xbridge, xbundle)) {
1580 output_normal(ctx, xbundle, vlan);
1583 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
1587 /* Compose SAMPLE action for sFlow or IPFIX. The given probability is
1588 * the number of packets out of UINT32_MAX to sample. The given
1589 * cookie is passed back in the callback for each sampled packet.
1592 compose_sample_action(const struct xbridge *xbridge,
1593 struct ofpbuf *odp_actions,
1594 const struct flow *flow,
1595 const uint32_t probability,
1596 const union user_action_cookie *cookie,
1597 const size_t cookie_size)
1599 size_t sample_offset, actions_offset;
1600 odp_port_t odp_port;
1604 sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE);
1606 nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability);
1608 actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS);
1610 odp_port = ofp_port_to_odp_port(xbridge, flow->in_port.ofp_port);
1611 pid = dpif_port_get_pid(xbridge->dpif, odp_port, 0);
1612 cookie_offset = odp_put_userspace_action(pid, cookie, cookie_size, odp_actions);
1614 nl_msg_end_nested(odp_actions, actions_offset);
1615 nl_msg_end_nested(odp_actions, sample_offset);
1616 return cookie_offset;
1620 compose_sflow_cookie(const struct xbridge *xbridge, ovs_be16 vlan_tci,
1621 odp_port_t odp_port, unsigned int n_outputs,
1622 union user_action_cookie *cookie)
1626 cookie->type = USER_ACTION_COOKIE_SFLOW;
1627 cookie->sflow.vlan_tci = vlan_tci;
1629 /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output
1630 * port information") for the interpretation of cookie->output. */
1631 switch (n_outputs) {
1633 /* 0x40000000 | 256 means "packet dropped for unknown reason". */
1634 cookie->sflow.output = 0x40000000 | 256;
1638 ifindex = dpif_sflow_odp_port_to_ifindex(xbridge->sflow, odp_port);
1640 cookie->sflow.output = ifindex;
1645 /* 0x80000000 means "multiple output ports. */
1646 cookie->sflow.output = 0x80000000 | n_outputs;
1651 /* Compose SAMPLE action for sFlow bridge sampling. */
1653 compose_sflow_action(const struct xbridge *xbridge,
1654 struct ofpbuf *odp_actions,
1655 const struct flow *flow,
1656 odp_port_t odp_port)
1658 uint32_t probability;
1659 union user_action_cookie cookie;
1661 if (!xbridge->sflow || flow->in_port.ofp_port == OFPP_NONE) {
1665 probability = dpif_sflow_get_probability(xbridge->sflow);
1666 compose_sflow_cookie(xbridge, htons(0), odp_port,
1667 odp_port == ODPP_NONE ? 0 : 1, &cookie);
1669 return compose_sample_action(xbridge, odp_actions, flow, probability,
1670 &cookie, sizeof cookie.sflow);
1674 compose_flow_sample_cookie(uint16_t probability, uint32_t collector_set_id,
1675 uint32_t obs_domain_id, uint32_t obs_point_id,
1676 union user_action_cookie *cookie)
1678 cookie->type = USER_ACTION_COOKIE_FLOW_SAMPLE;
1679 cookie->flow_sample.probability = probability;
1680 cookie->flow_sample.collector_set_id = collector_set_id;
1681 cookie->flow_sample.obs_domain_id = obs_domain_id;
1682 cookie->flow_sample.obs_point_id = obs_point_id;
1686 compose_ipfix_cookie(union user_action_cookie *cookie)
1688 cookie->type = USER_ACTION_COOKIE_IPFIX;
1691 /* Compose SAMPLE action for IPFIX bridge sampling. */
1693 compose_ipfix_action(const struct xbridge *xbridge,
1694 struct ofpbuf *odp_actions,
1695 const struct flow *flow)
1697 uint32_t probability;
1698 union user_action_cookie cookie;
1700 if (!xbridge->ipfix || flow->in_port.ofp_port == OFPP_NONE) {
1704 probability = dpif_ipfix_get_bridge_exporter_probability(xbridge->ipfix);
1705 compose_ipfix_cookie(&cookie);
1707 compose_sample_action(xbridge, odp_actions, flow, probability,
1708 &cookie, sizeof cookie.ipfix);
1711 /* SAMPLE action for sFlow must be first action in any given list of
1712 * actions. At this point we do not have all information required to
1713 * build it. So try to build sample action as complete as possible. */
1715 add_sflow_action(struct xlate_ctx *ctx)
1717 ctx->user_cookie_offset = compose_sflow_action(ctx->xbridge,
1718 &ctx->xout->odp_actions,
1719 &ctx->xin->flow, ODPP_NONE);
1720 ctx->sflow_odp_port = 0;
1721 ctx->sflow_n_outputs = 0;
1724 /* SAMPLE action for IPFIX must be 1st or 2nd action in any given list
1725 * of actions, eventually after the SAMPLE action for sFlow. */
1727 add_ipfix_action(struct xlate_ctx *ctx)
1729 compose_ipfix_action(ctx->xbridge, &ctx->xout->odp_actions,
1733 /* Fix SAMPLE action according to data collected while composing ODP actions.
1734 * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested
1735 * USERSPACE action's user-cookie which is required for sflow. */
1737 fix_sflow_action(struct xlate_ctx *ctx)
1739 const struct flow *base = &ctx->base_flow;
1740 union user_action_cookie *cookie;
1742 if (!ctx->user_cookie_offset) {
1746 cookie = ofpbuf_at(&ctx->xout->odp_actions, ctx->user_cookie_offset,
1747 sizeof cookie->sflow);
1748 ovs_assert(cookie->type == USER_ACTION_COOKIE_SFLOW);
1750 compose_sflow_cookie(ctx->xbridge, base->vlan_tci,
1751 ctx->sflow_odp_port, ctx->sflow_n_outputs, cookie);
1754 static enum slow_path_reason
1755 process_special(struct xlate_ctx *ctx, const struct flow *flow,
1756 const struct xport *xport, const struct ofpbuf *packet)
1758 struct flow_wildcards *wc = &ctx->xout->wc;
1759 const struct xbridge *xbridge = ctx->xbridge;
1763 } else if (xport->cfm && cfm_should_process_flow(xport->cfm, flow, wc)) {
1765 cfm_process_heartbeat(xport->cfm, packet);
1768 } else if (xport->bfd && bfd_should_process_flow(xport->bfd, flow, wc)) {
1770 bfd_process_packet(xport->bfd, flow, packet);
1771 /* If POLL received, immediately sends FINAL back. */
1772 if (bfd_should_send_packet(xport->bfd)) {
1774 ofproto_dpif_monitor_port_send_soon(xport->ofport);
1776 ofproto_dpif_monitor_port_send_soon_safe(xport->ofport);
1781 } else if (xport->xbundle && xport->xbundle->lacp
1782 && flow->dl_type == htons(ETH_TYPE_LACP)) {
1784 lacp_process_packet(xport->xbundle->lacp, xport->ofport, packet);
1787 } else if (xbridge->stp && stp_should_process_flow(flow, wc)) {
1789 stp_process_packet(xport, packet);
1798 compose_output_action__(struct xlate_ctx *ctx, ofp_port_t ofp_port,
1801 const struct xport *xport = get_ofp_port(ctx->xbridge, ofp_port);
1802 struct flow_wildcards *wc = &ctx->xout->wc;
1803 struct flow *flow = &ctx->xin->flow;
1804 ovs_be16 flow_vlan_tci;
1805 uint32_t flow_pkt_mark;
1806 uint8_t flow_nw_tos;
1807 odp_port_t out_port, odp_port;
1810 /* If 'struct flow' gets additional metadata, we'll need to zero it out
1811 * before traversing a patch port. */
1812 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 25);
1815 xlate_report(ctx, "Nonexistent output port");
1817 } else if (xport->config & OFPUTIL_PC_NO_FWD) {
1818 xlate_report(ctx, "OFPPC_NO_FWD set, skipping output");
1820 } else if (check_stp) {
1821 if (eth_addr_equals(ctx->base_flow.dl_dst, eth_addr_stp)) {
1822 if (!xport_stp_listen_state(xport)) {
1823 xlate_report(ctx, "STP not in listening state, "
1824 "skipping bpdu output");
1827 } else if (!xport_stp_forward_state(xport)) {
1828 xlate_report(ctx, "STP not in forwarding state, "
1834 if (mbridge_has_mirrors(ctx->xbridge->mbridge) && xport->xbundle) {
1835 ctx->xout->mirrors |= xbundle_mirror_dst(xport->xbundle->xbridge,
1840 const struct xport *peer = xport->peer;
1841 struct flow old_flow = ctx->xin->flow;
1842 enum slow_path_reason special;
1844 ctx->xbridge = peer->xbridge;
1845 flow->in_port.ofp_port = peer->ofp_port;
1846 flow->metadata = htonll(0);
1847 memset(&flow->tunnel, 0, sizeof flow->tunnel);
1848 memset(flow->regs, 0, sizeof flow->regs);
1850 special = process_special(ctx, &ctx->xin->flow, peer,
1853 ctx->xout->slow |= special;
1854 } else if (may_receive(peer, ctx)) {
1855 if (xport_stp_forward_state(peer)) {
1856 xlate_table_action(ctx, flow->in_port.ofp_port, 0, true, true);
1858 /* Forwarding is disabled by STP. Let OFPP_NORMAL and the
1859 * learning action look at the packet, then drop it. */
1860 struct flow old_base_flow = ctx->base_flow;
1861 size_t old_size = ofpbuf_size(&ctx->xout->odp_actions);
1862 mirror_mask_t old_mirrors = ctx->xout->mirrors;
1863 xlate_table_action(ctx, flow->in_port.ofp_port, 0, true, true);
1864 ctx->xout->mirrors = old_mirrors;
1865 ctx->base_flow = old_base_flow;
1866 ofpbuf_set_size(&ctx->xout->odp_actions, old_size);
1870 ctx->xin->flow = old_flow;
1871 ctx->xbridge = xport->xbridge;
1873 if (ctx->xin->resubmit_stats) {
1874 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
1875 netdev_vport_inc_rx(peer->netdev, ctx->xin->resubmit_stats);
1877 bfd_account_rx(peer->bfd, ctx->xin->resubmit_stats);
1880 if (ctx->xin->xcache) {
1881 struct xc_entry *entry;
1883 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NETDEV);
1884 entry->u.dev.tx = netdev_ref(xport->netdev);
1885 entry->u.dev.rx = netdev_ref(peer->netdev);
1886 entry->u.dev.bfd = bfd_ref(peer->bfd);
1892 flow_vlan_tci = flow->vlan_tci;
1893 flow_pkt_mark = flow->pkt_mark;
1894 flow_nw_tos = flow->nw_tos;
1896 if (dscp_from_skb_priority(xport, flow->skb_priority, &dscp)) {
1897 wc->masks.nw_tos |= IP_DSCP_MASK;
1898 flow->nw_tos &= ~IP_DSCP_MASK;
1899 flow->nw_tos |= dscp;
1902 if (xport->is_tunnel) {
1903 /* Save tunnel metadata so that changes made due to
1904 * the Logical (tunnel) Port are not visible for any further
1905 * matches, while explicit set actions on tunnel metadata are.
1907 struct flow_tnl flow_tnl = flow->tunnel;
1908 odp_port = tnl_port_send(xport->ofport, flow, &ctx->xout->wc);
1909 if (odp_port == ODPP_NONE) {
1910 xlate_report(ctx, "Tunneling decided against output");
1911 goto out; /* restore flow_nw_tos */
1913 if (flow->tunnel.ip_dst == ctx->orig_tunnel_ip_dst) {
1914 xlate_report(ctx, "Not tunneling to our own address");
1915 goto out; /* restore flow_nw_tos */
1917 if (ctx->xin->resubmit_stats) {
1918 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
1920 if (ctx->xin->xcache) {
1921 struct xc_entry *entry;
1923 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NETDEV);
1924 entry->u.dev.tx = netdev_ref(xport->netdev);
1926 out_port = odp_port;
1927 commit_odp_tunnel_action(flow, &ctx->base_flow,
1928 &ctx->xout->odp_actions);
1929 flow->tunnel = flow_tnl; /* Restore tunnel metadata */
1931 odp_port = xport->odp_port;
1932 out_port = odp_port;
1933 if (ofproto_has_vlan_splinters(ctx->xbridge->ofproto)) {
1934 ofp_port_t vlandev_port;
1936 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
1937 vlandev_port = vsp_realdev_to_vlandev(ctx->xbridge->ofproto,
1938 ofp_port, flow->vlan_tci);
1939 if (vlandev_port != ofp_port) {
1940 out_port = ofp_port_to_odp_port(ctx->xbridge, vlandev_port);
1941 flow->vlan_tci = htons(0);
1946 if (out_port != ODPP_NONE) {
1947 ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow,
1948 &ctx->xout->odp_actions,
1951 if (ctx->xout->use_recirc) {
1952 struct ovs_action_hash *act_hash;
1953 struct xlate_recirc *xr = &ctx->xout->recirc;
1956 act_hash = nl_msg_put_unspec_uninit(&ctx->xout->odp_actions,
1957 OVS_ACTION_ATTR_HASH,
1959 act_hash->hash_alg = xr->hash_alg;
1960 act_hash->hash_bias = xr->hash_bias;
1962 /* Recirc action. */
1963 nl_msg_put_u32(&ctx->xout->odp_actions, OVS_ACTION_ATTR_RECIRC,
1966 nl_msg_put_odp_port(&ctx->xout->odp_actions, OVS_ACTION_ATTR_OUTPUT,
1970 ctx->sflow_odp_port = odp_port;
1971 ctx->sflow_n_outputs++;
1972 ctx->xout->nf_output_iface = ofp_port;
1977 flow->vlan_tci = flow_vlan_tci;
1978 flow->pkt_mark = flow_pkt_mark;
1979 flow->nw_tos = flow_nw_tos;
1983 compose_output_action(struct xlate_ctx *ctx, ofp_port_t ofp_port)
1985 compose_output_action__(ctx, ofp_port, true);
1989 xlate_recursively(struct xlate_ctx *ctx, struct rule_dpif *rule)
1991 struct rule_dpif *old_rule = ctx->rule;
1992 struct rule_actions *actions;
1994 if (ctx->xin->resubmit_stats) {
1995 rule_dpif_credit_stats(rule, ctx->xin->resubmit_stats);
1997 if (ctx->xin->xcache) {
1998 struct xc_entry *entry;
2000 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_RULE);
2001 entry->u.rule = rule;
2002 rule_dpif_ref(rule);
2008 actions = rule_dpif_get_actions(rule);
2009 do_xlate_actions(actions->ofpacts, actions->ofpacts_len, ctx);
2010 ctx->rule = old_rule;
2015 xlate_resubmit_resource_check(struct xlate_ctx *ctx)
2017 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
2019 if (ctx->recurse >= MAX_RESUBMIT_RECURSION + MAX_INTERNAL_RESUBMITS) {
2020 VLOG_ERR_RL(&rl, "resubmit actions recursed over %d times",
2021 MAX_RESUBMIT_RECURSION);
2022 } else if (ctx->resubmits >= MAX_RESUBMITS + MAX_INTERNAL_RESUBMITS) {
2023 VLOG_ERR_RL(&rl, "over %d resubmit actions", MAX_RESUBMITS);
2024 } else if (ofpbuf_size(&ctx->xout->odp_actions) > UINT16_MAX) {
2025 VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of actions");
2026 } else if (ofpbuf_size(&ctx->stack) >= 65536) {
2027 VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of stack");
2036 xlate_table_action(struct xlate_ctx *ctx, ofp_port_t in_port, uint8_t table_id,
2037 bool may_packet_in, bool honor_table_miss)
2039 if (xlate_resubmit_resource_check(ctx)) {
2040 ofp_port_t old_in_port = ctx->xin->flow.in_port.ofp_port;
2041 bool skip_wildcards = ctx->xin->skip_wildcards;
2042 uint8_t old_table_id = ctx->table_id;
2043 struct rule_dpif *rule;
2044 enum rule_dpif_lookup_verdict verdict;
2045 enum ofputil_port_config config = 0;
2047 ctx->table_id = table_id;
2049 /* Look up a flow with 'in_port' as the input port. Then restore the
2050 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
2051 * have surprising behavior). */
2052 ctx->xin->flow.in_port.ofp_port = in_port;
2053 verdict = rule_dpif_lookup_from_table(ctx->xbridge->ofproto,
2056 ? &ctx->xout->wc : NULL,
2058 &ctx->table_id, &rule);
2059 ctx->xin->flow.in_port.ofp_port = old_in_port;
2061 if (ctx->xin->resubmit_hook) {
2062 ctx->xin->resubmit_hook(ctx->xin, rule, ctx->recurse);
2066 case RULE_DPIF_LOOKUP_VERDICT_MATCH:
2068 case RULE_DPIF_LOOKUP_VERDICT_CONTROLLER:
2069 if (may_packet_in) {
2070 struct xport *xport;
2072 xport = get_ofp_port(ctx->xbridge,
2073 ctx->xin->flow.in_port.ofp_port);
2074 config = xport ? xport->config : 0;
2077 /* Fall through to drop */
2078 case RULE_DPIF_LOOKUP_VERDICT_DROP:
2079 config = OFPUTIL_PC_NO_PACKET_IN;
2081 case RULE_DPIF_LOOKUP_VERDICT_DEFAULT:
2082 if (!ofproto_dpif_wants_packet_in_on_miss(ctx->xbridge->ofproto)) {
2083 config = OFPUTIL_PC_NO_PACKET_IN;
2090 choose_miss_rule(config, ctx->xbridge->miss_rule,
2091 ctx->xbridge->no_packet_in_rule, &rule);
2095 xlate_recursively(ctx, rule);
2096 rule_dpif_unref(rule);
2099 ctx->table_id = old_table_id;
2107 xlate_group_bucket(struct xlate_ctx *ctx, const struct ofputil_bucket *bucket)
2109 uint64_t action_list_stub[1024 / 8];
2110 struct ofpbuf action_list, action_set;
2112 ofpbuf_use_const(&action_set, bucket->ofpacts, bucket->ofpacts_len);
2113 ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub);
2115 ofpacts_execute_action_set(&action_list, &action_set);
2117 do_xlate_actions(ofpbuf_data(&action_list), ofpbuf_size(&action_list), ctx);
2120 ofpbuf_uninit(&action_set);
2121 ofpbuf_uninit(&action_list);
2125 xlate_all_group(struct xlate_ctx *ctx, struct group_dpif *group)
2127 const struct ofputil_bucket *bucket;
2128 const struct list *buckets;
2129 struct flow old_flow = ctx->xin->flow;
2131 group_dpif_get_buckets(group, &buckets);
2133 LIST_FOR_EACH (bucket, list_node, buckets) {
2134 xlate_group_bucket(ctx, bucket);
2135 /* Roll back flow to previous state.
2136 * This is equivalent to cloning the packet for each bucket.
2138 * As a side effect any subsequently applied actions will
2139 * also effectively be applied to a clone of the packet taken
2140 * just before applying the all or indirect group. */
2141 ctx->xin->flow = old_flow;
2146 xlate_ff_group(struct xlate_ctx *ctx, struct group_dpif *group)
2148 const struct ofputil_bucket *bucket;
2150 bucket = group_first_live_bucket(ctx, group, 0);
2152 xlate_group_bucket(ctx, bucket);
2157 xlate_select_group(struct xlate_ctx *ctx, struct group_dpif *group)
2159 struct flow_wildcards *wc = &ctx->xout->wc;
2160 const struct ofputil_bucket *bucket;
2163 basis = hash_mac(ctx->xin->flow.dl_dst, 0, 0);
2164 bucket = group_best_live_bucket(ctx, group, basis);
2166 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
2167 xlate_group_bucket(ctx, bucket);
2172 xlate_group_action__(struct xlate_ctx *ctx, struct group_dpif *group)
2174 ctx->in_group = true;
2176 switch (group_dpif_get_type(group)) {
2178 case OFPGT11_INDIRECT:
2179 xlate_all_group(ctx, group);
2181 case OFPGT11_SELECT:
2182 xlate_select_group(ctx, group);
2185 xlate_ff_group(ctx, group);
2190 group_dpif_release(group);
2192 ctx->in_group = false;
2196 xlate_group_resource_check(struct xlate_ctx *ctx)
2198 if (!xlate_resubmit_resource_check(ctx)) {
2200 } else if (ctx->in_group) {
2201 /* Prevent nested translation of OpenFlow groups.
2203 * OpenFlow allows this restriction. We enforce this restriction only
2204 * because, with the current architecture, we would otherwise have to
2205 * take a possibly recursive read lock on the ofgroup rwlock, which is
2206 * unsafe given that POSIX allows taking a read lock to block if there
2207 * is a thread blocked on taking the write lock. Other solutions
2208 * without this restriction are also possible, but seem unwarranted
2209 * given the current limited use of groups. */
2210 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
2212 VLOG_ERR_RL(&rl, "cannot recursively translate OpenFlow group");
2220 xlate_group_action(struct xlate_ctx *ctx, uint32_t group_id)
2222 if (xlate_group_resource_check(ctx)) {
2223 struct group_dpif *group;
2226 got_group = group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group);
2228 xlate_group_action__(ctx, group);
2238 xlate_ofpact_resubmit(struct xlate_ctx *ctx,
2239 const struct ofpact_resubmit *resubmit)
2243 bool may_packet_in = false;
2244 bool honor_table_miss = false;
2246 if (ctx->rule && rule_dpif_is_internal(ctx->rule)) {
2247 /* Still allow missed packets to be sent to the controller
2248 * if resubmitting from an internal table. */
2249 may_packet_in = true;
2250 honor_table_miss = true;
2253 in_port = resubmit->in_port;
2254 if (in_port == OFPP_IN_PORT) {
2255 in_port = ctx->xin->flow.in_port.ofp_port;
2258 table_id = resubmit->table_id;
2259 if (table_id == 255) {
2260 table_id = ctx->table_id;
2263 xlate_table_action(ctx, in_port, table_id, may_packet_in,
2268 flood_packets(struct xlate_ctx *ctx, bool all)
2270 const struct xport *xport;
2272 HMAP_FOR_EACH (xport, ofp_node, &ctx->xbridge->xports) {
2273 if (xport->ofp_port == ctx->xin->flow.in_port.ofp_port) {
2278 compose_output_action__(ctx, xport->ofp_port, false);
2279 } else if (!(xport->config & OFPUTIL_PC_NO_FLOOD)) {
2280 compose_output_action(ctx, xport->ofp_port);
2284 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
2288 execute_controller_action(struct xlate_ctx *ctx, int len,
2289 enum ofp_packet_in_reason reason,
2290 uint16_t controller_id)
2292 struct ofproto_packet_in *pin;
2293 struct ofpbuf *packet;
2294 struct pkt_metadata md = PKT_METADATA_INITIALIZER(0);
2296 ctx->xout->slow |= SLOW_CONTROLLER;
2297 if (!ctx->xin->packet) {
2301 packet = ofpbuf_clone(ctx->xin->packet);
2303 ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
2304 &ctx->xout->odp_actions,
2307 odp_execute_actions(NULL, packet, false, &md,
2308 ofpbuf_data(&ctx->xout->odp_actions),
2309 ofpbuf_size(&ctx->xout->odp_actions), NULL);
2311 pin = xmalloc(sizeof *pin);
2312 pin->up.packet_len = ofpbuf_size(packet);
2313 pin->up.packet = ofpbuf_steal_data(packet);
2314 pin->up.reason = reason;
2315 pin->up.table_id = ctx->table_id;
2316 pin->up.cookie = (ctx->rule
2317 ? rule_dpif_get_flow_cookie(ctx->rule)
2320 flow_get_metadata(&ctx->xin->flow, &pin->up.fmd);
2322 pin->controller_id = controller_id;
2323 pin->send_len = len;
2324 /* If a rule is a table-miss rule then this is
2325 * a table-miss handled by a table-miss rule.
2327 * Else, if rule is internal and has a controller action,
2328 * the later being implied by the rule being processed here,
2329 * then this is a table-miss handled without a table-miss rule.
2331 * Otherwise this is not a table-miss. */
2332 pin->miss_type = OFPROTO_PACKET_IN_NO_MISS;
2334 if (rule_dpif_is_table_miss(ctx->rule)) {
2335 pin->miss_type = OFPROTO_PACKET_IN_MISS_FLOW;
2336 } else if (rule_dpif_is_internal(ctx->rule)) {
2337 pin->miss_type = OFPROTO_PACKET_IN_MISS_WITHOUT_FLOW;
2340 ofproto_dpif_send_packet_in(ctx->xbridge->ofproto, pin);
2341 ofpbuf_delete(packet);
2345 compose_mpls_push_action(struct xlate_ctx *ctx, struct ofpact_push_mpls *mpls)
2347 struct flow_wildcards *wc = &ctx->xout->wc;
2348 struct flow *flow = &ctx->xin->flow;
2351 ovs_assert(eth_type_mpls(mpls->ethertype));
2353 n = flow_count_mpls_labels(flow, wc);
2355 ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow,
2356 &ctx->xout->odp_actions,
2358 } else if (n >= FLOW_MAX_MPLS_LABELS) {
2359 if (ctx->xin->packet != NULL) {
2360 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2361 VLOG_WARN_RL(&rl, "bridge %s: dropping packet on which an "
2362 "MPLS push action can't be performed as it would "
2363 "have more MPLS LSEs than the %d supported.",
2364 ctx->xbridge->name, FLOW_MAX_MPLS_LABELS);
2368 } else if (n >= ctx->xbridge->max_mpls_depth) {
2369 COVERAGE_INC(xlate_actions_mpls_overflow);
2370 ctx->xout->slow |= SLOW_ACTION;
2373 flow_push_mpls(flow, n, mpls->ethertype, wc);
2377 compose_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type)
2379 struct flow_wildcards *wc = &ctx->xout->wc;
2380 struct flow *flow = &ctx->xin->flow;
2381 int n = flow_count_mpls_labels(flow, wc);
2383 if (!flow_pop_mpls(flow, n, eth_type, wc) && n >= FLOW_MAX_MPLS_LABELS) {
2384 if (ctx->xin->packet != NULL) {
2385 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2386 VLOG_WARN_RL(&rl, "bridge %s: dropping packet on which an "
2387 "MPLS pop action can't be performed as it has "
2388 "more MPLS LSEs than the %d supported.",
2389 ctx->xbridge->name, FLOW_MAX_MPLS_LABELS);
2392 ofpbuf_clear(&ctx->xout->odp_actions);
2397 compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids)
2399 struct flow *flow = &ctx->xin->flow;
2401 if (!is_ip_any(flow)) {
2405 ctx->xout->wc.masks.nw_ttl = 0xff;
2406 if (flow->nw_ttl > 1) {
2412 for (i = 0; i < ids->n_controllers; i++) {
2413 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL,
2417 /* Stop processing for current table. */
2423 compose_set_mpls_label_action(struct xlate_ctx *ctx, ovs_be32 label)
2425 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
2426 ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_LABEL_MASK);
2427 set_mpls_lse_label(&ctx->xin->flow.mpls_lse[0], label);
2432 compose_set_mpls_tc_action(struct xlate_ctx *ctx, uint8_t tc)
2434 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
2435 ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_TC_MASK);
2436 set_mpls_lse_tc(&ctx->xin->flow.mpls_lse[0], tc);
2441 compose_set_mpls_ttl_action(struct xlate_ctx *ctx, uint8_t ttl)
2443 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
2444 ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_TTL_MASK);
2445 set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse[0], ttl);
2450 compose_dec_mpls_ttl_action(struct xlate_ctx *ctx)
2452 struct flow *flow = &ctx->xin->flow;
2453 uint8_t ttl = mpls_lse_to_ttl(flow->mpls_lse[0]);
2454 struct flow_wildcards *wc = &ctx->xout->wc;
2456 memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse);
2457 if (eth_type_mpls(flow->dl_type)) {
2460 set_mpls_lse_ttl(&flow->mpls_lse[0], ttl);
2463 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, 0);
2465 /* Stop processing for current table. */
2474 xlate_output_action(struct xlate_ctx *ctx,
2475 ofp_port_t port, uint16_t max_len, bool may_packet_in)
2477 ofp_port_t prev_nf_output_iface = ctx->xout->nf_output_iface;
2479 ctx->xout->nf_output_iface = NF_OUT_DROP;
2483 compose_output_action(ctx, ctx->xin->flow.in_port.ofp_port);
2486 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
2487 0, may_packet_in, true);
2493 flood_packets(ctx, false);
2496 flood_packets(ctx, true);
2498 case OFPP_CONTROLLER:
2499 execute_controller_action(ctx, max_len, OFPR_ACTION, 0);
2505 if (port != ctx->xin->flow.in_port.ofp_port) {
2506 compose_output_action(ctx, port);
2508 xlate_report(ctx, "skipping output to input port");
2513 if (prev_nf_output_iface == NF_OUT_FLOOD) {
2514 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
2515 } else if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
2516 ctx->xout->nf_output_iface = prev_nf_output_iface;
2517 } else if (prev_nf_output_iface != NF_OUT_DROP &&
2518 ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
2519 ctx->xout->nf_output_iface = NF_OUT_MULTI;
2524 xlate_output_reg_action(struct xlate_ctx *ctx,
2525 const struct ofpact_output_reg *or)
2527 uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow);
2528 if (port <= UINT16_MAX) {
2529 union mf_subvalue value;
2531 memset(&value, 0xff, sizeof value);
2532 mf_write_subfield_flow(&or->src, &value, &ctx->xout->wc.masks);
2533 xlate_output_action(ctx, u16_to_ofp(port),
2534 or->max_len, false);
2539 xlate_enqueue_action(struct xlate_ctx *ctx,
2540 const struct ofpact_enqueue *enqueue)
2542 ofp_port_t ofp_port = enqueue->port;
2543 uint32_t queue_id = enqueue->queue;
2544 uint32_t flow_priority, priority;
2547 /* Translate queue to priority. */
2548 error = dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &priority);
2550 /* Fall back to ordinary output action. */
2551 xlate_output_action(ctx, enqueue->port, 0, false);
2555 /* Check output port. */
2556 if (ofp_port == OFPP_IN_PORT) {
2557 ofp_port = ctx->xin->flow.in_port.ofp_port;
2558 } else if (ofp_port == ctx->xin->flow.in_port.ofp_port) {
2562 /* Add datapath actions. */
2563 flow_priority = ctx->xin->flow.skb_priority;
2564 ctx->xin->flow.skb_priority = priority;
2565 compose_output_action(ctx, ofp_port);
2566 ctx->xin->flow.skb_priority = flow_priority;
2568 /* Update NetFlow output port. */
2569 if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
2570 ctx->xout->nf_output_iface = ofp_port;
2571 } else if (ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
2572 ctx->xout->nf_output_iface = NF_OUT_MULTI;
2577 xlate_set_queue_action(struct xlate_ctx *ctx, uint32_t queue_id)
2579 uint32_t skb_priority;
2581 if (!dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &skb_priority)) {
2582 ctx->xin->flow.skb_priority = skb_priority;
2584 /* Couldn't translate queue to a priority. Nothing to do. A warning
2585 * has already been logged. */
2590 slave_enabled_cb(ofp_port_t ofp_port, void *xbridge_)
2592 const struct xbridge *xbridge = xbridge_;
2603 case OFPP_CONTROLLER: /* Not supported by the bundle action. */
2606 port = get_ofp_port(xbridge, ofp_port);
2607 return port ? port->may_enable : false;
2612 xlate_bundle_action(struct xlate_ctx *ctx,
2613 const struct ofpact_bundle *bundle)
2617 port = bundle_execute(bundle, &ctx->xin->flow, &ctx->xout->wc,
2619 CONST_CAST(struct xbridge *, ctx->xbridge));
2620 if (bundle->dst.field) {
2621 nxm_reg_load(&bundle->dst, ofp_to_u16(port), &ctx->xin->flow,
2624 xlate_output_action(ctx, port, 0, false);
2629 xlate_learn_action(struct xlate_ctx *ctx,
2630 const struct ofpact_learn *learn)
2632 uint64_t ofpacts_stub[1024 / 8];
2633 struct ofputil_flow_mod fm;
2634 struct ofpbuf ofpacts;
2636 ctx->xout->has_learn = true;
2638 learn_mask(learn, &ctx->xout->wc);
2640 if (!ctx->xin->may_learn) {
2644 ofpbuf_use_stub(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
2645 learn_execute(learn, &ctx->xin->flow, &fm, &ofpacts);
2646 ofproto_dpif_flow_mod(ctx->xbridge->ofproto, &fm);
2647 ofpbuf_uninit(&ofpacts);
2649 if (ctx->xin->xcache) {
2650 struct xc_entry *entry;
2652 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_LEARN);
2653 entry->u.learn.ofproto = ctx->xin->ofproto;
2654 rule_dpif_lookup(ctx->xbridge->ofproto, &ctx->xin->flow, NULL,
2655 &entry->u.learn.rule);
2660 xlate_fin_timeout__(struct rule_dpif *rule, uint16_t tcp_flags,
2661 uint16_t idle_timeout, uint16_t hard_timeout)
2663 if (tcp_flags & (TCP_FIN | TCP_RST)) {
2664 rule_dpif_reduce_timeouts(rule, idle_timeout, hard_timeout);
2669 xlate_fin_timeout(struct xlate_ctx *ctx,
2670 const struct ofpact_fin_timeout *oft)
2673 xlate_fin_timeout__(ctx->rule, ctx->xin->tcp_flags,
2674 oft->fin_idle_timeout, oft->fin_hard_timeout);
2675 if (ctx->xin->xcache) {
2676 struct xc_entry *entry;
2678 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_FIN_TIMEOUT);
2679 entry->u.fin.rule = ctx->rule;
2680 entry->u.fin.idle = oft->fin_idle_timeout;
2681 entry->u.fin.hard = oft->fin_hard_timeout;
2682 rule_dpif_ref(ctx->rule);
2688 xlate_sample_action(struct xlate_ctx *ctx,
2689 const struct ofpact_sample *os)
2691 union user_action_cookie cookie;
2692 /* Scale the probability from 16-bit to 32-bit while representing
2693 * the same percentage. */
2694 uint32_t probability = (os->probability << 16) | os->probability;
2696 if (!ctx->xbridge->variable_length_userdata) {
2697 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
2699 VLOG_ERR_RL(&rl, "ignoring NXAST_SAMPLE action because datapath "
2700 "lacks support (needs Linux 3.10+ or kernel module from "
2705 ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
2706 &ctx->xout->odp_actions,
2709 compose_flow_sample_cookie(os->probability, os->collector_set_id,
2710 os->obs_domain_id, os->obs_point_id, &cookie);
2711 compose_sample_action(ctx->xbridge, &ctx->xout->odp_actions, &ctx->xin->flow,
2712 probability, &cookie, sizeof cookie.flow_sample);
2716 may_receive(const struct xport *xport, struct xlate_ctx *ctx)
2718 if (xport->config & (eth_addr_equals(ctx->xin->flow.dl_dst, eth_addr_stp)
2719 ? OFPUTIL_PC_NO_RECV_STP
2720 : OFPUTIL_PC_NO_RECV)) {
2724 /* Only drop packets here if both forwarding and learning are
2725 * disabled. If just learning is enabled, we need to have
2726 * OFPP_NORMAL and the learning action have a look at the packet
2727 * before we can drop it. */
2728 if (!xport_stp_forward_state(xport) && !xport_stp_learn_state(xport)) {
2736 xlate_write_actions(struct xlate_ctx *ctx, const struct ofpact *a)
2738 struct ofpact_nest *on = ofpact_get_WRITE_ACTIONS(a);
2739 ofpbuf_put(&ctx->action_set, on->actions, ofpact_nest_get_action_len(on));
2740 ofpact_pad(&ctx->action_set);
2744 xlate_action_set(struct xlate_ctx *ctx)
2746 uint64_t action_list_stub[1024 / 64];
2747 struct ofpbuf action_list;
2749 ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub);
2750 ofpacts_execute_action_set(&action_list, &ctx->action_set);
2751 do_xlate_actions(ofpbuf_data(&action_list), ofpbuf_size(&action_list), ctx);
2752 ofpbuf_uninit(&action_list);
2756 do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len,
2757 struct xlate_ctx *ctx)
2759 struct flow_wildcards *wc = &ctx->xout->wc;
2760 struct flow *flow = &ctx->xin->flow;
2761 const struct ofpact *a;
2763 /* dl_type already in the mask, not set below. */
2765 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
2766 struct ofpact_controller *controller;
2767 const struct ofpact_metadata *metadata;
2768 const struct ofpact_set_field *set_field;
2769 const struct mf_field *mf;
2777 xlate_output_action(ctx, ofpact_get_OUTPUT(a)->port,
2778 ofpact_get_OUTPUT(a)->max_len, true);
2782 if (xlate_group_action(ctx, ofpact_get_GROUP(a)->group_id)) {
2787 case OFPACT_CONTROLLER:
2788 controller = ofpact_get_CONTROLLER(a);
2789 execute_controller_action(ctx, controller->max_len,
2791 controller->controller_id);
2794 case OFPACT_ENQUEUE:
2795 xlate_enqueue_action(ctx, ofpact_get_ENQUEUE(a));
2798 case OFPACT_SET_VLAN_VID:
2799 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
2800 if (flow->vlan_tci & htons(VLAN_CFI) ||
2801 ofpact_get_SET_VLAN_VID(a)->push_vlan_if_needed) {
2802 flow->vlan_tci &= ~htons(VLAN_VID_MASK);
2803 flow->vlan_tci |= (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid)
2808 case OFPACT_SET_VLAN_PCP:
2809 wc->masks.vlan_tci |= htons(VLAN_PCP_MASK | VLAN_CFI);
2810 if (flow->vlan_tci & htons(VLAN_CFI) ||
2811 ofpact_get_SET_VLAN_PCP(a)->push_vlan_if_needed) {
2812 flow->vlan_tci &= ~htons(VLAN_PCP_MASK);
2813 flow->vlan_tci |= htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp
2814 << VLAN_PCP_SHIFT) | VLAN_CFI);
2818 case OFPACT_STRIP_VLAN:
2819 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
2820 flow->vlan_tci = htons(0);
2823 case OFPACT_PUSH_VLAN:
2824 /* XXX 802.1AD(QinQ) */
2825 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
2826 flow->vlan_tci = htons(VLAN_CFI);
2829 case OFPACT_SET_ETH_SRC:
2830 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
2831 memcpy(flow->dl_src, ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN);
2834 case OFPACT_SET_ETH_DST:
2835 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
2836 memcpy(flow->dl_dst, ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN);
2839 case OFPACT_SET_IPV4_SRC:
2840 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2841 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
2842 flow->nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4;
2846 case OFPACT_SET_IPV4_DST:
2847 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2848 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
2849 flow->nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4;
2853 case OFPACT_SET_IP_DSCP:
2854 if (is_ip_any(flow)) {
2855 wc->masks.nw_tos |= IP_DSCP_MASK;
2856 flow->nw_tos &= ~IP_DSCP_MASK;
2857 flow->nw_tos |= ofpact_get_SET_IP_DSCP(a)->dscp;
2861 case OFPACT_SET_IP_ECN:
2862 if (is_ip_any(flow)) {
2863 wc->masks.nw_tos |= IP_ECN_MASK;
2864 flow->nw_tos &= ~IP_ECN_MASK;
2865 flow->nw_tos |= ofpact_get_SET_IP_ECN(a)->ecn;
2869 case OFPACT_SET_IP_TTL:
2870 if (is_ip_any(flow)) {
2871 wc->masks.nw_ttl = 0xff;
2872 flow->nw_ttl = ofpact_get_SET_IP_TTL(a)->ttl;
2876 case OFPACT_SET_L4_SRC_PORT:
2877 if (is_ip_any(flow)) {
2878 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2879 memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src);
2880 flow->tp_src = htons(ofpact_get_SET_L4_SRC_PORT(a)->port);
2884 case OFPACT_SET_L4_DST_PORT:
2885 if (is_ip_any(flow)) {
2886 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2887 memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst);
2888 flow->tp_dst = htons(ofpact_get_SET_L4_DST_PORT(a)->port);
2892 case OFPACT_RESUBMIT:
2893 xlate_ofpact_resubmit(ctx, ofpact_get_RESUBMIT(a));
2896 case OFPACT_SET_TUNNEL:
2897 flow->tunnel.tun_id = htonll(ofpact_get_SET_TUNNEL(a)->tun_id);
2900 case OFPACT_SET_QUEUE:
2901 xlate_set_queue_action(ctx, ofpact_get_SET_QUEUE(a)->queue_id);
2904 case OFPACT_POP_QUEUE:
2905 flow->skb_priority = ctx->orig_skb_priority;
2908 case OFPACT_REG_MOVE:
2909 nxm_execute_reg_move(ofpact_get_REG_MOVE(a), flow, wc);
2912 case OFPACT_REG_LOAD:
2913 nxm_execute_reg_load(ofpact_get_REG_LOAD(a), flow, wc);
2916 case OFPACT_SET_FIELD:
2917 set_field = ofpact_get_SET_FIELD(a);
2918 mf = set_field->field;
2920 /* Set field action only ever overwrites packet's outermost
2921 * applicable header fields. Do nothing if no header exists. */
2922 if (mf->id == MFF_VLAN_VID) {
2923 wc->masks.vlan_tci |= htons(VLAN_CFI);
2924 if (!(flow->vlan_tci & htons(VLAN_CFI))) {
2927 } else if ((mf->id == MFF_MPLS_LABEL || mf->id == MFF_MPLS_TC)
2928 /* 'dl_type' is already unwildcarded. */
2929 && !eth_type_mpls(flow->dl_type)) {
2933 mf_mask_field_and_prereqs(mf, &wc->masks);
2934 mf_set_flow_value(mf, &set_field->value, flow);
2937 case OFPACT_STACK_PUSH:
2938 nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), flow, wc,
2942 case OFPACT_STACK_POP:
2943 nxm_execute_stack_pop(ofpact_get_STACK_POP(a), flow, wc,
2947 case OFPACT_PUSH_MPLS:
2948 compose_mpls_push_action(ctx, ofpact_get_PUSH_MPLS(a));
2951 case OFPACT_POP_MPLS:
2952 compose_mpls_pop_action(ctx, ofpact_get_POP_MPLS(a)->ethertype);
2955 case OFPACT_SET_MPLS_LABEL:
2956 compose_set_mpls_label_action(
2957 ctx, ofpact_get_SET_MPLS_LABEL(a)->label);
2960 case OFPACT_SET_MPLS_TC:
2961 compose_set_mpls_tc_action(ctx, ofpact_get_SET_MPLS_TC(a)->tc);
2964 case OFPACT_SET_MPLS_TTL:
2965 compose_set_mpls_ttl_action(ctx, ofpact_get_SET_MPLS_TTL(a)->ttl);
2968 case OFPACT_DEC_MPLS_TTL:
2969 if (compose_dec_mpls_ttl_action(ctx)) {
2974 case OFPACT_DEC_TTL:
2975 wc->masks.nw_ttl = 0xff;
2976 if (compose_dec_ttl(ctx, ofpact_get_DEC_TTL(a))) {
2982 /* Nothing to do. */
2985 case OFPACT_MULTIPATH:
2986 multipath_execute(ofpact_get_MULTIPATH(a), flow, wc);
2990 xlate_bundle_action(ctx, ofpact_get_BUNDLE(a));
2993 case OFPACT_OUTPUT_REG:
2994 xlate_output_reg_action(ctx, ofpact_get_OUTPUT_REG(a));
2998 xlate_learn_action(ctx, ofpact_get_LEARN(a));
3005 case OFPACT_FIN_TIMEOUT:
3006 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
3007 ctx->xout->has_fin_timeout = true;
3008 xlate_fin_timeout(ctx, ofpact_get_FIN_TIMEOUT(a));
3011 case OFPACT_CLEAR_ACTIONS:
3012 ofpbuf_clear(&ctx->action_set);
3015 case OFPACT_WRITE_ACTIONS:
3016 xlate_write_actions(ctx, a);
3019 case OFPACT_WRITE_METADATA:
3020 metadata = ofpact_get_WRITE_METADATA(a);
3021 flow->metadata &= ~metadata->mask;
3022 flow->metadata |= metadata->metadata & metadata->mask;
3026 /* Not implemented yet. */
3029 case OFPACT_GOTO_TABLE: {
3030 struct ofpact_goto_table *ogt = ofpact_get_GOTO_TABLE(a);
3032 ovs_assert(ctx->table_id < ogt->table_id);
3033 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
3034 ogt->table_id, true, true);
3039 xlate_sample_action(ctx, ofpact_get_SAMPLE(a));
3046 xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto,
3047 const struct flow *flow, struct rule_dpif *rule,
3048 uint16_t tcp_flags, const struct ofpbuf *packet)
3050 xin->ofproto = ofproto;
3052 xin->packet = packet;
3053 xin->may_learn = packet != NULL;
3056 xin->ofpacts = NULL;
3057 xin->ofpacts_len = 0;
3058 xin->tcp_flags = tcp_flags;
3059 xin->resubmit_hook = NULL;
3060 xin->report_hook = NULL;
3061 xin->resubmit_stats = NULL;
3062 xin->skip_wildcards = false;
3066 xlate_out_uninit(struct xlate_out *xout)
3069 ofpbuf_uninit(&xout->odp_actions);
3073 /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts'
3074 * into datapath actions, using 'ctx', and discards the datapath actions. */
3076 xlate_actions_for_side_effects(struct xlate_in *xin)
3078 struct xlate_out xout;
3080 xlate_actions(xin, &xout);
3081 xlate_out_uninit(&xout);
3085 xlate_report(struct xlate_ctx *ctx, const char *s)
3087 if (ctx->xin->report_hook) {
3088 ctx->xin->report_hook(ctx->xin, s, ctx->recurse);
3093 xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src)
3096 dst->slow = src->slow;
3097 dst->has_learn = src->has_learn;
3098 dst->has_normal = src->has_normal;
3099 dst->has_fin_timeout = src->has_fin_timeout;
3100 dst->nf_output_iface = src->nf_output_iface;
3101 dst->mirrors = src->mirrors;
3103 ofpbuf_use_stub(&dst->odp_actions, dst->odp_actions_stub,
3104 sizeof dst->odp_actions_stub);
3105 ofpbuf_put(&dst->odp_actions, ofpbuf_data(&src->odp_actions),
3106 ofpbuf_size(&src->odp_actions));
3109 static struct skb_priority_to_dscp *
3110 get_skb_priority(const struct xport *xport, uint32_t skb_priority)
3112 struct skb_priority_to_dscp *pdscp;
3115 hash = hash_int(skb_priority, 0);
3116 HMAP_FOR_EACH_IN_BUCKET (pdscp, hmap_node, hash, &xport->skb_priorities) {
3117 if (pdscp->skb_priority == skb_priority) {
3125 dscp_from_skb_priority(const struct xport *xport, uint32_t skb_priority,
3128 struct skb_priority_to_dscp *pdscp = get_skb_priority(xport, skb_priority);
3129 *dscp = pdscp ? pdscp->dscp : 0;
3130 return pdscp != NULL;
3134 clear_skb_priorities(struct xport *xport)
3136 struct skb_priority_to_dscp *pdscp, *next;
3138 HMAP_FOR_EACH_SAFE (pdscp, next, hmap_node, &xport->skb_priorities) {
3139 hmap_remove(&xport->skb_priorities, &pdscp->hmap_node);
3145 actions_output_to_local_port(const struct xlate_ctx *ctx)
3147 odp_port_t local_odp_port = ofp_port_to_odp_port(ctx->xbridge, OFPP_LOCAL);
3148 const struct nlattr *a;
3151 NL_ATTR_FOR_EACH_UNSAFE (a, left, ofpbuf_data(&ctx->xout->odp_actions),
3152 ofpbuf_size(&ctx->xout->odp_actions)) {
3153 if (nl_attr_type(a) == OVS_ACTION_ATTR_OUTPUT
3154 && nl_attr_get_odp_port(a) == local_odp_port) {
3161 /* Thread safe call to xlate_actions__(). */
3163 xlate_actions(struct xlate_in *xin, struct xlate_out *xout)
3164 OVS_EXCLUDED(xlate_rwlock)
3166 ovs_rwlock_rdlock(&xlate_rwlock);
3167 xlate_actions__(xin, xout);
3168 ovs_rwlock_unlock(&xlate_rwlock);
3171 /* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts'
3172 * into datapath actions in 'odp_actions', using 'ctx'.
3174 * The caller must take responsibility for eventually freeing 'xout', with
3175 * xlate_out_uninit(). */
3177 xlate_actions__(struct xlate_in *xin, struct xlate_out *xout)
3178 OVS_REQ_RDLOCK(xlate_rwlock)
3180 struct flow_wildcards *wc = &xout->wc;
3181 struct flow *flow = &xin->flow;
3182 struct rule_dpif *rule = NULL;
3184 struct rule_actions *actions = NULL;
3185 enum slow_path_reason special;
3186 const struct ofpact *ofpacts;
3187 struct xport *in_port;
3188 struct flow orig_flow;
3189 struct xlate_ctx ctx;
3194 COVERAGE_INC(xlate_actions);
3196 /* Flow initialization rules:
3197 * - 'base_flow' must match the kernel's view of the packet at the
3198 * time that action processing starts. 'flow' represents any
3199 * transformations we wish to make through actions.
3200 * - By default 'base_flow' and 'flow' are the same since the input
3201 * packet matches the output before any actions are applied.
3202 * - When using VLAN splinters, 'base_flow''s VLAN is set to the value
3203 * of the received packet as seen by the kernel. If we later output
3204 * to another device without any modifications this will cause us to
3205 * insert a new tag since the original one was stripped off by the
3207 * - Tunnel metadata as received is retained in 'flow'. This allows
3208 * tunnel metadata matching also in later tables.
3209 * Since a kernel action for setting the tunnel metadata will only be
3210 * generated with actual tunnel output, changing the tunnel metadata
3211 * values in 'flow' (such as tun_id) will only have effect with a later
3212 * tunnel output action.
3213 * - Tunnel 'base_flow' is completely cleared since that is what the
3214 * kernel does. If we wish to maintain the original values an action
3215 * needs to be generated. */
3220 ctx.xout->has_learn = false;
3221 ctx.xout->has_normal = false;
3222 ctx.xout->has_fin_timeout = false;
3223 ctx.xout->nf_output_iface = NF_OUT_DROP;
3224 ctx.xout->mirrors = 0;
3225 ofpbuf_use_stub(&ctx.xout->odp_actions, ctx.xout->odp_actions_stub,
3226 sizeof ctx.xout->odp_actions_stub);
3227 ofpbuf_reserve(&ctx.xout->odp_actions, NL_A_U32_SIZE);
3229 ctx.xbridge = xbridge_lookup(xin->ofproto);
3234 ctx.rule = xin->rule;
3236 ctx.base_flow = *flow;
3237 memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel);
3238 ctx.orig_tunnel_ip_dst = flow->tunnel.ip_dst;
3240 flow_wildcards_init_catchall(wc);
3241 memset(&wc->masks.in_port, 0xff, sizeof wc->masks.in_port);
3242 memset(&wc->masks.skb_priority, 0xff, sizeof wc->masks.skb_priority);
3243 memset(&wc->masks.dl_type, 0xff, sizeof wc->masks.dl_type);
3244 if (is_ip_any(flow)) {
3245 wc->masks.nw_frag |= FLOW_NW_FRAG_MASK;
3247 is_icmp = is_icmpv4(flow) || is_icmpv6(flow);
3249 tnl_may_send = tnl_xlate_init(&ctx.base_flow, flow, wc);
3250 if (ctx.xbridge->netflow) {
3251 netflow_mask_wc(flow, wc);
3256 ctx.in_group = false;
3257 ctx.orig_skb_priority = flow->skb_priority;
3261 if (!xin->ofpacts && !ctx.rule) {
3262 ctx.table_id = rule_dpif_lookup(ctx.xbridge->ofproto, flow,
3263 !xin->skip_wildcards ? wc : NULL,
3265 if (ctx.xin->resubmit_stats) {
3266 rule_dpif_credit_stats(rule, ctx.xin->resubmit_stats);
3268 if (ctx.xin->xcache) {
3269 struct xc_entry *entry;
3271 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_RULE);
3272 rule_dpif_ref(rule);
3273 entry->u.rule = rule;
3277 xout->fail_open = ctx.rule && rule_dpif_is_fail_open(ctx.rule);
3278 xout->use_recirc = false;
3281 ofpacts = xin->ofpacts;
3282 ofpacts_len = xin->ofpacts_len;
3283 } else if (ctx.rule) {
3284 actions = rule_dpif_get_actions(ctx.rule);
3285 ofpacts = actions->ofpacts;
3286 ofpacts_len = actions->ofpacts_len;
3291 ofpbuf_use_stub(&ctx.stack, ctx.init_stack, sizeof ctx.init_stack);
3292 ofpbuf_use_stub(&ctx.action_set,
3293 ctx.action_set_stub, sizeof ctx.action_set_stub);
3295 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
3296 /* Do this conditionally because the copy is expensive enough that it
3297 * shows up in profiles. */
3301 if (flow->nw_frag & FLOW_NW_FRAG_ANY) {
3302 switch (ctx.xbridge->frag) {
3303 case OFPC_FRAG_NORMAL:
3304 /* We must pretend that transport ports are unavailable. */
3305 flow->tp_src = ctx.base_flow.tp_src = htons(0);
3306 flow->tp_dst = ctx.base_flow.tp_dst = htons(0);
3309 case OFPC_FRAG_DROP:
3312 case OFPC_FRAG_REASM:
3315 case OFPC_FRAG_NX_MATCH:
3316 /* Nothing to do. */
3319 case OFPC_INVALID_TTL_TO_CONTROLLER:
3324 in_port = get_ofp_port(ctx.xbridge, flow->in_port.ofp_port);
3325 if (in_port && in_port->is_tunnel) {
3326 if (ctx.xin->resubmit_stats) {
3327 netdev_vport_inc_rx(in_port->netdev, ctx.xin->resubmit_stats);
3329 bfd_account_rx(in_port->bfd, ctx.xin->resubmit_stats);
3332 if (ctx.xin->xcache) {
3333 struct xc_entry *entry;
3335 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_NETDEV);
3336 entry->u.dev.rx = netdev_ref(in_port->netdev);
3337 entry->u.dev.bfd = bfd_ref(in_port->bfd);
3341 special = process_special(&ctx, flow, in_port, ctx.xin->packet);
3343 ctx.xout->slow |= special;
3345 size_t sample_actions_len;
3347 if (flow->in_port.ofp_port
3348 != vsp_realdev_to_vlandev(ctx.xbridge->ofproto,
3349 flow->in_port.ofp_port,
3351 ctx.base_flow.vlan_tci = 0;
3354 add_sflow_action(&ctx);
3355 add_ipfix_action(&ctx);
3356 sample_actions_len = ofpbuf_size(&ctx.xout->odp_actions);
3358 if (tnl_may_send && (!in_port || may_receive(in_port, &ctx))) {
3359 do_xlate_actions(ofpacts, ofpacts_len, &ctx);
3361 /* We've let OFPP_NORMAL and the learning action look at the
3362 * packet, so drop it now if forwarding is disabled. */
3363 if (in_port && !xport_stp_forward_state(in_port)) {
3364 ofpbuf_set_size(&ctx.xout->odp_actions, sample_actions_len);
3368 if (ofpbuf_size(&ctx.action_set)) {
3369 xlate_action_set(&ctx);
3372 if (ctx.xbridge->has_in_band
3373 && in_band_must_output_to_local_port(flow)
3374 && !actions_output_to_local_port(&ctx)) {
3375 compose_output_action(&ctx, OFPP_LOCAL);
3378 fix_sflow_action(&ctx);
3380 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
3381 add_mirror_actions(&ctx, &orig_flow);
3385 if (nl_attr_oversized(ofpbuf_size(&ctx.xout->odp_actions))) {
3386 /* These datapath actions are too big for a Netlink attribute, so we
3387 * can't hand them to the kernel directly. dpif_execute() can execute
3388 * them one by one with help, so just mark the result as SLOW_ACTION to
3389 * prevent the flow from being installed. */
3390 COVERAGE_INC(xlate_actions_oversize);
3391 ctx.xout->slow |= SLOW_ACTION;
3394 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
3395 if (ctx.xin->resubmit_stats) {
3396 mirror_update_stats(ctx.xbridge->mbridge, xout->mirrors,
3397 ctx.xin->resubmit_stats->n_packets,
3398 ctx.xin->resubmit_stats->n_bytes);
3400 if (ctx.xin->xcache) {
3401 struct xc_entry *entry;
3403 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_MIRROR);
3404 entry->u.mirror.mbridge = mbridge_ref(ctx.xbridge->mbridge);
3405 entry->u.mirror.mirrors = xout->mirrors;
3409 if (ctx.xbridge->netflow) {
3410 const struct ofpact *ofpacts = actions->ofpacts;
3411 size_t ofpacts_len = actions->ofpacts_len;
3413 /* Only update netflow if we don't have controller flow. We don't
3414 * report NetFlow expiration messages for such facets because they
3415 * are just part of the control logic for the network, not real
3417 if (ofpacts_len == 0
3418 || ofpacts->type != OFPACT_CONTROLLER
3419 || ofpact_next(ofpacts) < ofpact_end(ofpacts, ofpacts_len)) {
3420 if (ctx.xin->resubmit_stats) {
3421 netflow_flow_update(ctx.xbridge->netflow, flow,
3422 xout->nf_output_iface,
3423 ctx.xin->resubmit_stats);
3425 if (ctx.xin->xcache) {
3426 struct xc_entry *entry;
3428 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_NETFLOW);
3429 entry->u.nf.netflow = netflow_ref(ctx.xbridge->netflow);
3430 entry->u.nf.flow = xmemdup(flow, sizeof *flow);
3431 entry->u.nf.iface = xout->nf_output_iface;
3436 ofpbuf_uninit(&ctx.stack);
3437 ofpbuf_uninit(&ctx.action_set);
3439 /* Clear the metadata and register wildcard masks, because we won't
3440 * use non-header fields as part of the cache. */
3441 flow_wildcards_clear_non_packet_fields(wc);
3443 /* ICMPv4 and ICMPv6 have 8-bit "type" and "code" fields. struct flow uses
3444 * the low 8 bits of the 16-bit tp_src and tp_dst members to represent
3445 * these fields. The datapath interface, on the other hand, represents
3446 * them with just 8 bits each. This means that if the high 8 bits of the
3447 * masks for these fields somehow become set, then they will get chopped
3448 * off by a round trip through the datapath, and revalidation will spot
3449 * that as an inconsistency and delete the flow. Avoid the problem here by
3450 * making sure that only the low 8 bits of either field can be unwildcarded
3454 wc->masks.tp_src &= htons(UINT8_MAX);
3455 wc->masks.tp_dst &= htons(UINT8_MAX);
3459 rule_dpif_unref(rule);
3462 /* Sends 'packet' out 'ofport'.
3463 * May modify 'packet'.
3464 * Returns 0 if successful, otherwise a positive errno value. */
3466 xlate_send_packet(const struct ofport_dpif *ofport, struct ofpbuf *packet)
3468 struct xport *xport;
3469 struct ofpact_output output;
3472 ofpact_init(&output.ofpact, OFPACT_OUTPUT, sizeof output);
3473 /* Use OFPP_NONE as the in_port to avoid special packet processing. */
3474 flow_extract(packet, NULL, &flow);
3475 flow.in_port.ofp_port = OFPP_NONE;
3477 ovs_rwlock_rdlock(&xlate_rwlock);
3478 xport = xport_lookup(ofport);
3480 ovs_rwlock_unlock(&xlate_rwlock);
3483 output.port = xport->ofp_port;
3485 ovs_rwlock_unlock(&xlate_rwlock);
3487 return ofproto_dpif_execute_actions(xport->xbridge->ofproto, &flow, NULL,
3488 &output.ofpact, sizeof output,
3492 struct xlate_cache *
3493 xlate_cache_new(void)
3495 struct xlate_cache *xcache = xmalloc(sizeof *xcache);
3497 ofpbuf_init(&xcache->entries, 512);
3501 static struct xc_entry *
3502 xlate_cache_add_entry(struct xlate_cache *xcache, enum xc_type type)
3504 struct xc_entry *entry;
3506 entry = ofpbuf_put_zeros(&xcache->entries, sizeof *entry);
3513 xlate_cache_netdev(struct xc_entry *entry, const struct dpif_flow_stats *stats)
3515 if (entry->u.dev.tx) {
3516 netdev_vport_inc_tx(entry->u.dev.tx, stats);
3518 if (entry->u.dev.rx) {
3519 netdev_vport_inc_rx(entry->u.dev.rx, stats);
3521 if (entry->u.dev.bfd) {
3522 bfd_account_rx(entry->u.dev.bfd, stats);
3527 xlate_cache_normal(struct ofproto_dpif *ofproto, struct flow *flow, int vlan)
3529 struct xbridge *xbridge;
3530 struct xbundle *xbundle;
3531 struct flow_wildcards wc;
3533 xbridge = xbridge_lookup(ofproto);
3538 xbundle = lookup_input_bundle(xbridge, flow->in_port.ofp_port, false,
3544 update_learning_table(xbridge, flow, &wc, vlan, xbundle);
3547 /* Push stats and perform side effects of flow translation. */
3549 xlate_push_stats(struct xlate_cache *xcache, bool may_learn,
3550 const struct dpif_flow_stats *stats)
3552 struct xc_entry *entry;
3553 struct ofpbuf entries = xcache->entries;
3555 XC_ENTRY_FOR_EACH (entry, entries, xcache) {
3556 switch (entry->type) {
3558 rule_dpif_credit_stats(entry->u.rule, stats);
3561 bond_account(entry->u.bond.bond, entry->u.bond.flow,
3562 entry->u.bond.vid, stats->n_bytes);
3565 xlate_cache_netdev(entry, stats);
3568 netflow_flow_update(entry->u.nf.netflow, entry->u.nf.flow,
3569 entry->u.nf.iface, stats);
3572 mirror_update_stats(entry->u.mirror.mbridge,
3573 entry->u.mirror.mirrors,
3574 stats->n_packets, stats->n_bytes);
3578 struct rule_dpif *rule = entry->u.learn.rule;
3580 /* Reset the modified time for a rule that is equivalent to
3581 * the currently cached rule. If the rule is not the exact
3582 * rule wehave cached, update the reference that we have. */
3583 entry->u.learn.rule = ofproto_dpif_refresh_rule(rule);
3587 xlate_cache_normal(entry->u.normal.ofproto, entry->u.normal.flow,
3588 entry->u.normal.vlan);
3590 case XC_FIN_TIMEOUT:
3591 xlate_fin_timeout__(entry->u.fin.rule, stats->tcp_flags,
3592 entry->u.fin.idle, entry->u.fin.hard);
3601 xlate_dev_unref(struct xc_entry *entry)
3603 if (entry->u.dev.tx) {
3604 netdev_close(entry->u.dev.tx);
3606 if (entry->u.dev.rx) {
3607 netdev_close(entry->u.dev.rx);
3609 if (entry->u.dev.bfd) {
3610 bfd_unref(entry->u.dev.bfd);
3615 xlate_cache_clear_netflow(struct netflow *netflow, struct flow *flow)
3617 netflow_expire(netflow, flow);
3618 netflow_flow_clear(netflow, flow);
3619 netflow_unref(netflow);
3624 xlate_cache_clear(struct xlate_cache *xcache)
3626 struct xc_entry *entry;
3627 struct ofpbuf entries;
3633 XC_ENTRY_FOR_EACH (entry, entries, xcache) {
3634 switch (entry->type) {
3636 rule_dpif_unref(entry->u.rule);
3639 free(entry->u.bond.flow);
3640 bond_unref(entry->u.bond.bond);
3643 xlate_dev_unref(entry);
3646 xlate_cache_clear_netflow(entry->u.nf.netflow, entry->u.nf.flow);
3649 mbridge_unref(entry->u.mirror.mbridge);
3652 rule_dpif_unref(entry->u.learn.rule);
3655 free(entry->u.normal.flow);
3657 case XC_FIN_TIMEOUT:
3658 rule_dpif_unref(entry->u.fin.rule);
3665 ofpbuf_clear(&xcache->entries);
3669 xlate_cache_delete(struct xlate_cache *xcache)
3671 xlate_cache_clear(xcache);
3672 ofpbuf_uninit(&xcache->entries);