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
62 /* Maximum number of resubmit actions in a flow translation, whether they are
63 * recursive or not. */
64 #define MAX_RESUBMITS (MAX_RESUBMIT_RECURSION * MAX_RESUBMIT_RECURSION)
66 struct ovs_rwlock xlate_rwlock = OVS_RWLOCK_INITIALIZER;
69 struct hmap_node hmap_node; /* Node in global 'xbridges' map. */
70 struct ofproto_dpif *ofproto; /* Key in global 'xbridges' map. */
72 struct list xbundles; /* Owned xbundles. */
73 struct hmap xports; /* Indexed by ofp_port. */
75 char *name; /* Name used in log messages. */
76 struct dpif *dpif; /* Datapath interface. */
77 struct mac_learning *ml; /* Mac learning handle. */
78 struct mbridge *mbridge; /* Mirroring. */
79 struct dpif_sflow *sflow; /* SFlow handle, or null. */
80 struct dpif_ipfix *ipfix; /* Ipfix handle, or null. */
81 struct netflow *netflow; /* Netflow handle, or null. */
82 struct stp *stp; /* STP or null if disabled. */
84 /* Special rules installed by ofproto-dpif. */
85 struct rule_dpif *miss_rule;
86 struct rule_dpif *no_packet_in_rule;
88 enum ofp_config_flags frag; /* Fragmentation handling. */
89 bool has_in_band; /* Bridge has in band control? */
90 bool forward_bpdu; /* Bridge forwards STP BPDUs? */
92 /* True if the datapath supports variable-length
93 * OVS_USERSPACE_ATTR_USERDATA in OVS_ACTION_ATTR_USERSPACE actions.
94 * False if the datapath supports only 8-byte (or shorter) userdata. */
95 bool variable_length_userdata;
97 /* Number of MPLS label stack entries that the datapath supports
99 size_t max_mpls_depth;
103 struct hmap_node hmap_node; /* In global 'xbundles' map. */
104 struct ofbundle *ofbundle; /* Key in global 'xbundles' map. */
106 struct list list_node; /* In parent 'xbridges' list. */
107 struct xbridge *xbridge; /* Parent xbridge. */
109 struct list xports; /* Contains "struct xport"s. */
111 char *name; /* Name used in log messages. */
112 struct bond *bond; /* Nonnull iff more than one port. */
113 struct lacp *lacp; /* LACP handle or null. */
115 enum port_vlan_mode vlan_mode; /* VLAN mode. */
116 int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */
117 unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1.
118 * NULL if all VLANs are trunked. */
119 bool use_priority_tags; /* Use 802.1p tag for frames in VLAN 0? */
120 bool floodable; /* No port has OFPUTIL_PC_NO_FLOOD set? */
124 struct hmap_node hmap_node; /* Node in global 'xports' map. */
125 struct ofport_dpif *ofport; /* Key in global 'xports map. */
127 struct hmap_node ofp_node; /* Node in parent xbridge 'xports' map. */
128 ofp_port_t ofp_port; /* Key in parent xbridge 'xports' map. */
130 odp_port_t odp_port; /* Datapath port number or ODPP_NONE. */
132 struct list bundle_node; /* In parent xbundle (if it exists). */
133 struct xbundle *xbundle; /* Parent xbundle or null. */
135 struct netdev *netdev; /* 'ofport''s netdev. */
137 struct xbridge *xbridge; /* Parent bridge. */
138 struct xport *peer; /* Patch port peer or null. */
140 enum ofputil_port_config config; /* OpenFlow port configuration. */
141 enum ofputil_port_state state; /* OpenFlow port state. */
142 int stp_port_no; /* STP port number or -1 if not in use. */
144 struct hmap skb_priorities; /* Map of 'skb_priority_to_dscp's. */
146 bool may_enable; /* May be enabled in bonds. */
147 bool is_tunnel; /* Is a tunnel port. */
149 struct cfm *cfm; /* CFM handle or null. */
150 struct bfd *bfd; /* BFD handle or null. */
154 struct xlate_in *xin;
155 struct xlate_out *xout;
157 const struct xbridge *xbridge;
159 /* Flow at the last commit. */
160 struct flow base_flow;
162 /* Tunnel IP destination address as received. This is stored separately
163 * as the base_flow.tunnel is cleared on init to reflect the datapath
164 * behavior. Used to make sure not to send tunneled output to ourselves,
165 * which might lead to an infinite loop. This could happen easily
166 * if a tunnel is marked as 'ip_remote=flow', and the flow does not
167 * actually set the tun_dst field. */
168 ovs_be32 orig_tunnel_ip_dst;
170 /* Stack for the push and pop actions. Each stack element is of type
171 * "union mf_subvalue". */
172 union mf_subvalue init_stack[1024 / sizeof(union mf_subvalue)];
175 /* The rule that we are currently translating, or NULL. */
176 struct rule_dpif *rule;
178 /* Resubmit statistics, via xlate_table_action(). */
179 int recurse; /* Current resubmit nesting depth. */
180 int resubmits; /* Total number of resubmits. */
181 bool in_group; /* Currently translating ofgroup, if true. */
183 uint32_t orig_skb_priority; /* Priority when packet arrived. */
184 uint8_t table_id; /* OpenFlow table ID where flow was found. */
185 uint32_t sflow_n_outputs; /* Number of output ports. */
186 odp_port_t sflow_odp_port; /* Output port for composing sFlow action. */
187 uint16_t user_cookie_offset;/* Used for user_action_cookie fixup. */
188 bool exit; /* No further actions should be processed. */
190 /* OpenFlow 1.1+ action set.
192 * 'action_set' accumulates "struct ofpact"s added by OFPACT_WRITE_ACTIONS.
193 * When translation is otherwise complete, ofpacts_execute_action_set()
194 * converts it to a set of "struct ofpact"s that can be translated into
195 * datapath actions. */
196 struct ofpbuf action_set; /* Action set. */
197 uint64_t action_set_stub[1024 / 8];
200 /* A controller may use OFPP_NONE as the ingress port to indicate that
201 * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for
202 * when an input bundle is needed for validation (e.g., mirroring or
203 * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have
204 * any 'port' structs, so care must be taken when dealing with it. */
205 static struct xbundle ofpp_none_bundle = {
207 .vlan_mode = PORT_VLAN_TRUNK
210 /* Node in 'xport''s 'skb_priorities' map. Used to maintain a map from
211 * 'priority' (the datapath's term for QoS queue) to the dscp bits which all
212 * traffic egressing the 'ofport' with that priority should be marked with. */
213 struct skb_priority_to_dscp {
214 struct hmap_node hmap_node; /* Node in 'ofport_dpif''s 'skb_priorities'. */
215 uint32_t skb_priority; /* Priority of this queue (see struct flow). */
217 uint8_t dscp; /* DSCP bits to mark outgoing traffic with. */
220 static struct hmap xbridges = HMAP_INITIALIZER(&xbridges);
221 static struct hmap xbundles = HMAP_INITIALIZER(&xbundles);
222 static struct hmap xports = HMAP_INITIALIZER(&xports);
224 static bool may_receive(const struct xport *, struct xlate_ctx *);
225 static void do_xlate_actions(const struct ofpact *, size_t ofpacts_len,
227 static void xlate_actions__(struct xlate_in *, struct xlate_out *)
228 OVS_REQ_RDLOCK(xlate_rwlock);
229 static void xlate_normal(struct xlate_ctx *);
230 static void xlate_report(struct xlate_ctx *, const char *);
231 static void xlate_table_action(struct xlate_ctx *, ofp_port_t in_port,
232 uint8_t table_id, bool may_packet_in,
233 bool honor_table_miss);
234 static bool input_vid_is_valid(uint16_t vid, struct xbundle *, bool warn);
235 static uint16_t input_vid_to_vlan(const struct xbundle *, uint16_t vid);
236 static void output_normal(struct xlate_ctx *, const struct xbundle *,
238 static void compose_output_action(struct xlate_ctx *, ofp_port_t ofp_port);
240 static struct xbridge *xbridge_lookup(const struct ofproto_dpif *);
241 static struct xbundle *xbundle_lookup(const struct ofbundle *);
242 static struct xport *xport_lookup(const struct ofport_dpif *);
243 static struct xport *get_ofp_port(const struct xbridge *, ofp_port_t ofp_port);
244 static struct skb_priority_to_dscp *get_skb_priority(const struct xport *,
245 uint32_t skb_priority);
246 static void clear_skb_priorities(struct xport *);
247 static bool dscp_from_skb_priority(const struct xport *, uint32_t skb_priority,
251 xlate_ofproto_set(struct ofproto_dpif *ofproto, const char *name,
252 struct dpif *dpif, struct rule_dpif *miss_rule,
253 struct rule_dpif *no_packet_in_rule,
254 const struct mac_learning *ml, struct stp *stp,
255 const struct mbridge *mbridge,
256 const struct dpif_sflow *sflow,
257 const struct dpif_ipfix *ipfix,
258 const struct netflow *netflow, enum ofp_config_flags frag,
259 bool forward_bpdu, bool has_in_band,
260 bool variable_length_userdata,
261 size_t max_mpls_depth)
263 struct xbridge *xbridge = xbridge_lookup(ofproto);
266 xbridge = xzalloc(sizeof *xbridge);
267 xbridge->ofproto = ofproto;
269 hmap_insert(&xbridges, &xbridge->hmap_node, hash_pointer(ofproto, 0));
270 hmap_init(&xbridge->xports);
271 list_init(&xbridge->xbundles);
274 if (xbridge->ml != ml) {
275 mac_learning_unref(xbridge->ml);
276 xbridge->ml = mac_learning_ref(ml);
279 if (xbridge->mbridge != mbridge) {
280 mbridge_unref(xbridge->mbridge);
281 xbridge->mbridge = mbridge_ref(mbridge);
284 if (xbridge->sflow != sflow) {
285 dpif_sflow_unref(xbridge->sflow);
286 xbridge->sflow = dpif_sflow_ref(sflow);
289 if (xbridge->ipfix != ipfix) {
290 dpif_ipfix_unref(xbridge->ipfix);
291 xbridge->ipfix = dpif_ipfix_ref(ipfix);
294 if (xbridge->stp != stp) {
295 stp_unref(xbridge->stp);
296 xbridge->stp = stp_ref(stp);
299 if (xbridge->netflow != netflow) {
300 netflow_unref(xbridge->netflow);
301 xbridge->netflow = netflow_ref(netflow);
305 xbridge->name = xstrdup(name);
307 xbridge->dpif = dpif;
308 xbridge->forward_bpdu = forward_bpdu;
309 xbridge->has_in_band = has_in_band;
310 xbridge->frag = frag;
311 xbridge->miss_rule = miss_rule;
312 xbridge->no_packet_in_rule = no_packet_in_rule;
313 xbridge->variable_length_userdata = variable_length_userdata;
314 xbridge->max_mpls_depth = max_mpls_depth;
318 xlate_remove_ofproto(struct ofproto_dpif *ofproto)
320 struct xbridge *xbridge = xbridge_lookup(ofproto);
321 struct xbundle *xbundle, *next_xbundle;
322 struct xport *xport, *next_xport;
328 HMAP_FOR_EACH_SAFE (xport, next_xport, ofp_node, &xbridge->xports) {
329 xlate_ofport_remove(xport->ofport);
332 LIST_FOR_EACH_SAFE (xbundle, next_xbundle, list_node, &xbridge->xbundles) {
333 xlate_bundle_remove(xbundle->ofbundle);
336 hmap_remove(&xbridges, &xbridge->hmap_node);
337 mac_learning_unref(xbridge->ml);
338 mbridge_unref(xbridge->mbridge);
339 dpif_sflow_unref(xbridge->sflow);
340 dpif_ipfix_unref(xbridge->ipfix);
341 stp_unref(xbridge->stp);
342 hmap_destroy(&xbridge->xports);
348 xlate_bundle_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
349 const char *name, enum port_vlan_mode vlan_mode, int vlan,
350 unsigned long *trunks, bool use_priority_tags,
351 const struct bond *bond, const struct lacp *lacp,
354 struct xbundle *xbundle = xbundle_lookup(ofbundle);
357 xbundle = xzalloc(sizeof *xbundle);
358 xbundle->ofbundle = ofbundle;
359 xbundle->xbridge = xbridge_lookup(ofproto);
361 hmap_insert(&xbundles, &xbundle->hmap_node, hash_pointer(ofbundle, 0));
362 list_insert(&xbundle->xbridge->xbundles, &xbundle->list_node);
363 list_init(&xbundle->xports);
366 ovs_assert(xbundle->xbridge);
369 xbundle->name = xstrdup(name);
371 xbundle->vlan_mode = vlan_mode;
372 xbundle->vlan = vlan;
373 xbundle->trunks = trunks;
374 xbundle->use_priority_tags = use_priority_tags;
375 xbundle->floodable = floodable;
377 if (xbundle->bond != bond) {
378 bond_unref(xbundle->bond);
379 xbundle->bond = bond_ref(bond);
382 if (xbundle->lacp != lacp) {
383 lacp_unref(xbundle->lacp);
384 xbundle->lacp = lacp_ref(lacp);
389 xlate_bundle_remove(struct ofbundle *ofbundle)
391 struct xbundle *xbundle = xbundle_lookup(ofbundle);
392 struct xport *xport, *next;
398 LIST_FOR_EACH_SAFE (xport, next, bundle_node, &xbundle->xports) {
399 list_remove(&xport->bundle_node);
400 xport->xbundle = NULL;
403 hmap_remove(&xbundles, &xbundle->hmap_node);
404 list_remove(&xbundle->list_node);
405 bond_unref(xbundle->bond);
406 lacp_unref(xbundle->lacp);
412 xlate_ofport_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
413 struct ofport_dpif *ofport, ofp_port_t ofp_port,
414 odp_port_t odp_port, const struct netdev *netdev,
415 const struct cfm *cfm, const struct bfd *bfd,
416 struct ofport_dpif *peer, int stp_port_no,
417 const struct ofproto_port_queue *qdscp_list, size_t n_qdscp,
418 enum ofputil_port_config config,
419 enum ofputil_port_state state, bool is_tunnel,
422 struct xport *xport = xport_lookup(ofport);
426 xport = xzalloc(sizeof *xport);
427 xport->ofport = ofport;
428 xport->xbridge = xbridge_lookup(ofproto);
429 xport->ofp_port = ofp_port;
431 hmap_init(&xport->skb_priorities);
432 hmap_insert(&xports, &xport->hmap_node, hash_pointer(ofport, 0));
433 hmap_insert(&xport->xbridge->xports, &xport->ofp_node,
434 hash_ofp_port(xport->ofp_port));
437 ovs_assert(xport->ofp_port == ofp_port);
439 xport->config = config;
440 xport->state = state;
441 xport->stp_port_no = stp_port_no;
442 xport->is_tunnel = is_tunnel;
443 xport->may_enable = may_enable;
444 xport->odp_port = odp_port;
446 if (xport->netdev != netdev) {
447 netdev_close(xport->netdev);
448 xport->netdev = netdev_ref(netdev);
451 if (xport->cfm != cfm) {
452 cfm_unref(xport->cfm);
453 xport->cfm = cfm_ref(cfm);
456 if (xport->bfd != bfd) {
457 bfd_unref(xport->bfd);
458 xport->bfd = bfd_ref(bfd);
462 xport->peer->peer = NULL;
464 xport->peer = xport_lookup(peer);
466 xport->peer->peer = xport;
469 if (xport->xbundle) {
470 list_remove(&xport->bundle_node);
472 xport->xbundle = xbundle_lookup(ofbundle);
473 if (xport->xbundle) {
474 list_insert(&xport->xbundle->xports, &xport->bundle_node);
477 clear_skb_priorities(xport);
478 for (i = 0; i < n_qdscp; i++) {
479 struct skb_priority_to_dscp *pdscp;
480 uint32_t skb_priority;
482 if (dpif_queue_to_priority(xport->xbridge->dpif, qdscp_list[i].queue,
487 pdscp = xmalloc(sizeof *pdscp);
488 pdscp->skb_priority = skb_priority;
489 pdscp->dscp = (qdscp_list[i].dscp << 2) & IP_DSCP_MASK;
490 hmap_insert(&xport->skb_priorities, &pdscp->hmap_node,
491 hash_int(pdscp->skb_priority, 0));
496 xlate_ofport_remove(struct ofport_dpif *ofport)
498 struct xport *xport = xport_lookup(ofport);
505 xport->peer->peer = NULL;
509 if (xport->xbundle) {
510 list_remove(&xport->bundle_node);
513 clear_skb_priorities(xport);
514 hmap_destroy(&xport->skb_priorities);
516 hmap_remove(&xports, &xport->hmap_node);
517 hmap_remove(&xport->xbridge->xports, &xport->ofp_node);
519 netdev_close(xport->netdev);
520 cfm_unref(xport->cfm);
521 bfd_unref(xport->bfd);
525 /* Given a datpath, packet, and flow metadata ('backer', 'packet', and 'key'
526 * respectively), populates 'flow' with the result of odp_flow_key_to_flow().
527 * Optionally populates 'ofproto' with the ofproto_dpif, 'odp_in_port' with
528 * the datapath in_port, that 'packet' ingressed, and 'ipfix', 'sflow', and
529 * 'netflow' with the appropriate handles for those protocols if they're
530 * enabled. Caller is responsible for unrefing them.
532 * If 'ofproto' is nonnull, requires 'flow''s in_port to exist. Otherwise sets
533 * 'flow''s in_port to OFPP_NONE.
535 * This function does post-processing on data returned from
536 * odp_flow_key_to_flow() to help make VLAN splinters transparent to the rest
537 * of the upcall processing logic. In particular, if the extracted in_port is
538 * a VLAN splinter port, it replaces flow->in_port by the "real" port, sets
539 * flow->vlan_tci correctly for the VLAN of the VLAN splinter port, and pushes
540 * a VLAN header onto 'packet' (if it is nonnull).
542 * Similarly, this function also includes some logic to help with tunnels. It
543 * may modify 'flow' as necessary to make the tunneling implementation
544 * transparent to the upcall processing logic.
546 * Returns 0 if successful, ENODEV if the parsed flow has no associated ofport,
547 * or some other positive errno if there are other problems. */
549 xlate_receive(const struct dpif_backer *backer, struct ofpbuf *packet,
550 const struct nlattr *key, size_t key_len, struct flow *flow,
551 struct ofproto_dpif **ofproto, struct dpif_ipfix **ipfix,
552 struct dpif_sflow **sflow, struct netflow **netflow,
553 odp_port_t *odp_in_port)
555 const struct xport *xport;
558 ovs_rwlock_rdlock(&xlate_rwlock);
559 if (odp_flow_key_to_flow(key, key_len, flow) == ODP_FIT_ERROR) {
565 *odp_in_port = flow->in_port.odp_port;
568 xport = xport_lookup(tnl_port_should_receive(flow)
569 ? tnl_port_receive(flow)
570 : odp_port_to_ofport(backer, flow->in_port.odp_port));
572 flow->in_port.ofp_port = xport ? xport->ofp_port : OFPP_NONE;
577 if (vsp_adjust_flow(xport->xbridge->ofproto, flow)) {
579 /* Make the packet resemble the flow, so that it gets sent to
580 * an OpenFlow controller properly, so that it looks correct
581 * for sFlow, and so that flow_extract() will get the correct
582 * vlan_tci if it is called on 'packet'. */
583 eth_push_vlan(packet, htons(ETH_TYPE_VLAN), flow->vlan_tci);
589 *ofproto = xport->xbridge->ofproto;
593 *ipfix = dpif_ipfix_ref(xport->xbridge->ipfix);
597 *sflow = dpif_sflow_ref(xport->xbridge->sflow);
601 *netflow = netflow_ref(xport->xbridge->netflow);
605 ovs_rwlock_unlock(&xlate_rwlock);
609 static struct xbridge *
610 xbridge_lookup(const struct ofproto_dpif *ofproto)
612 struct xbridge *xbridge;
618 HMAP_FOR_EACH_IN_BUCKET (xbridge, hmap_node, hash_pointer(ofproto, 0),
620 if (xbridge->ofproto == ofproto) {
627 static struct xbundle *
628 xbundle_lookup(const struct ofbundle *ofbundle)
630 struct xbundle *xbundle;
636 HMAP_FOR_EACH_IN_BUCKET (xbundle, hmap_node, hash_pointer(ofbundle, 0),
638 if (xbundle->ofbundle == ofbundle) {
645 static struct xport *
646 xport_lookup(const struct ofport_dpif *ofport)
654 HMAP_FOR_EACH_IN_BUCKET (xport, hmap_node, hash_pointer(ofport, 0),
656 if (xport->ofport == ofport) {
663 static struct stp_port *
664 xport_get_stp_port(const struct xport *xport)
666 return xport->xbridge->stp && xport->stp_port_no != -1
667 ? stp_get_port(xport->xbridge->stp, xport->stp_port_no)
672 xport_stp_learn_state(const struct xport *xport)
674 struct stp_port *sp = xport_get_stp_port(xport);
675 return stp_learn_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
679 xport_stp_forward_state(const struct xport *xport)
681 struct stp_port *sp = xport_get_stp_port(xport);
682 return stp_forward_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
686 xport_stp_listen_state(const struct xport *xport)
688 struct stp_port *sp = xport_get_stp_port(xport);
689 return stp_listen_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED);
692 /* Returns true if STP should process 'flow'. Sets fields in 'wc' that
693 * were used to make the determination.*/
695 stp_should_process_flow(const struct flow *flow, struct flow_wildcards *wc)
697 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
698 return eth_addr_equals(flow->dl_dst, eth_addr_stp);
702 stp_process_packet(const struct xport *xport, const struct ofpbuf *packet)
704 struct stp_port *sp = xport_get_stp_port(xport);
705 struct ofpbuf payload = *packet;
706 struct eth_header *eth = ofpbuf_data(&payload);
708 /* Sink packets on ports that have STP disabled when the bridge has
710 if (!sp || stp_port_get_state(sp) == STP_DISABLED) {
714 /* Trim off padding on payload. */
715 if (ofpbuf_size(&payload) > ntohs(eth->eth_type) + ETH_HEADER_LEN) {
716 ofpbuf_set_size(&payload, ntohs(eth->eth_type) + ETH_HEADER_LEN);
719 if (ofpbuf_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) {
720 stp_received_bpdu(sp, ofpbuf_data(&payload), ofpbuf_size(&payload));
724 static struct xport *
725 get_ofp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
729 HMAP_FOR_EACH_IN_BUCKET (xport, ofp_node, hash_ofp_port(ofp_port),
731 if (xport->ofp_port == ofp_port) {
739 ofp_port_to_odp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
741 const struct xport *xport = get_ofp_port(xbridge, ofp_port);
742 return xport ? xport->odp_port : ODPP_NONE;
746 odp_port_is_alive(const struct xlate_ctx *ctx, ofp_port_t ofp_port)
750 xport = get_ofp_port(ctx->xbridge, ofp_port);
751 if (!xport || xport->config & OFPUTIL_PC_PORT_DOWN ||
752 xport->state & OFPUTIL_PS_LINK_DOWN) {
759 static const struct ofputil_bucket *
760 group_first_live_bucket(const struct xlate_ctx *, const struct group_dpif *,
764 group_is_alive(const struct xlate_ctx *ctx, uint32_t group_id, int depth)
766 struct group_dpif *group;
769 hit = group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group);
774 hit = group_first_live_bucket(ctx, group, depth) != NULL;
776 group_dpif_release(group);
780 #define MAX_LIVENESS_RECURSION 128 /* Arbitrary limit */
783 bucket_is_alive(const struct xlate_ctx *ctx,
784 const struct ofputil_bucket *bucket, int depth)
786 if (depth >= MAX_LIVENESS_RECURSION) {
787 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
789 VLOG_WARN_RL(&rl, "bucket chaining exceeded %d links",
790 MAX_LIVENESS_RECURSION);
794 return !ofputil_bucket_has_liveness(bucket) ||
795 (bucket->watch_port != OFPP_ANY &&
796 odp_port_is_alive(ctx, bucket->watch_port)) ||
797 (bucket->watch_group != OFPG_ANY &&
798 group_is_alive(ctx, bucket->watch_group, depth + 1));
801 static const struct ofputil_bucket *
802 group_first_live_bucket(const struct xlate_ctx *ctx,
803 const struct group_dpif *group, int depth)
805 struct ofputil_bucket *bucket;
806 const struct list *buckets;
808 group_dpif_get_buckets(group, &buckets);
809 LIST_FOR_EACH (bucket, list_node, buckets) {
810 if (bucket_is_alive(ctx, bucket, depth)) {
818 static const struct ofputil_bucket *
819 group_best_live_bucket(const struct xlate_ctx *ctx,
820 const struct group_dpif *group,
823 const struct ofputil_bucket *best_bucket = NULL;
824 uint32_t best_score = 0;
827 const struct ofputil_bucket *bucket;
828 const struct list *buckets;
830 group_dpif_get_buckets(group, &buckets);
831 LIST_FOR_EACH (bucket, list_node, buckets) {
832 if (bucket_is_alive(ctx, bucket, 0)) {
833 uint32_t score = (hash_int(i, basis) & 0xffff) * bucket->weight;
834 if (score >= best_score) {
835 best_bucket = bucket;
846 xbundle_trunks_vlan(const struct xbundle *bundle, uint16_t vlan)
848 return (bundle->vlan_mode != PORT_VLAN_ACCESS
849 && (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan)));
853 xbundle_includes_vlan(const struct xbundle *xbundle, uint16_t vlan)
855 return vlan == xbundle->vlan || xbundle_trunks_vlan(xbundle, vlan);
859 xbundle_mirror_out(const struct xbridge *xbridge, struct xbundle *xbundle)
861 return xbundle != &ofpp_none_bundle
862 ? mirror_bundle_out(xbridge->mbridge, xbundle->ofbundle)
867 xbundle_mirror_src(const struct xbridge *xbridge, struct xbundle *xbundle)
869 return xbundle != &ofpp_none_bundle
870 ? mirror_bundle_src(xbridge->mbridge, xbundle->ofbundle)
875 xbundle_mirror_dst(const struct xbridge *xbridge, struct xbundle *xbundle)
877 return xbundle != &ofpp_none_bundle
878 ? mirror_bundle_dst(xbridge->mbridge, xbundle->ofbundle)
882 static struct xbundle *
883 lookup_input_bundle(const struct xbridge *xbridge, ofp_port_t in_port,
884 bool warn, struct xport **in_xportp)
888 /* Find the port and bundle for the received packet. */
889 xport = get_ofp_port(xbridge, in_port);
893 if (xport && xport->xbundle) {
894 return xport->xbundle;
897 /* Special-case OFPP_NONE, which a controller may use as the ingress
898 * port for traffic that it is sourcing. */
899 if (in_port == OFPP_NONE) {
900 return &ofpp_none_bundle;
903 /* Odd. A few possible reasons here:
905 * - We deleted a port but there are still a few packets queued up
908 * - Someone externally added a port (e.g. "ovs-dpctl add-if") that
909 * we don't know about.
911 * - The ofproto client didn't configure the port as part of a bundle.
912 * This is particularly likely to happen if a packet was received on the
913 * port after it was created, but before the client had a chance to
914 * configure its bundle.
917 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
919 VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown "
920 "port %"PRIu16, xbridge->name, in_port);
926 add_mirror_actions(struct xlate_ctx *ctx, const struct flow *orig_flow)
928 const struct xbridge *xbridge = ctx->xbridge;
929 mirror_mask_t mirrors;
930 struct xbundle *in_xbundle;
934 mirrors = ctx->xout->mirrors;
935 ctx->xout->mirrors = 0;
937 in_xbundle = lookup_input_bundle(xbridge, orig_flow->in_port.ofp_port,
938 ctx->xin->packet != NULL, NULL);
942 mirrors |= xbundle_mirror_src(xbridge, in_xbundle);
944 /* Drop frames on bundles reserved for mirroring. */
945 if (xbundle_mirror_out(xbridge, in_xbundle)) {
946 if (ctx->xin->packet != NULL) {
947 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
948 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
949 "%s, which is reserved exclusively for mirroring",
950 ctx->xbridge->name, in_xbundle->name);
952 ofpbuf_clear(&ctx->xout->odp_actions);
957 vid = vlan_tci_to_vid(orig_flow->vlan_tci);
958 if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) {
961 vlan = input_vid_to_vlan(in_xbundle, vid);
967 /* Restore the original packet before adding the mirror actions. */
968 ctx->xin->flow = *orig_flow;
971 mirror_mask_t dup_mirrors;
972 struct ofbundle *out;
973 unsigned long *vlans;
978 has_mirror = mirror_get(xbridge->mbridge, raw_ctz(mirrors),
979 &vlans, &dup_mirrors, &out, &out_vlan);
980 ovs_assert(has_mirror);
983 ctx->xout->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK);
985 vlan_mirrored = !vlans || bitmap_is_set(vlans, vlan);
988 if (!vlan_mirrored) {
989 mirrors = zero_rightmost_1bit(mirrors);
993 mirrors &= ~dup_mirrors;
994 ctx->xout->mirrors |= dup_mirrors;
996 struct xbundle *out_xbundle = xbundle_lookup(out);
998 output_normal(ctx, out_xbundle, vlan);
1000 } else if (vlan != out_vlan
1001 && !eth_addr_is_reserved(orig_flow->dl_dst)) {
1002 struct xbundle *xbundle;
1004 LIST_FOR_EACH (xbundle, list_node, &xbridge->xbundles) {
1005 if (xbundle_includes_vlan(xbundle, out_vlan)
1006 && !xbundle_mirror_out(xbridge, xbundle)) {
1007 output_normal(ctx, xbundle, out_vlan);
1014 /* Given 'vid', the VID obtained from the 802.1Q header that was received as
1015 * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle',
1016 * the bundle on which the packet was received, returns the VLAN to which the
1019 * Both 'vid' and the return value are in the range 0...4095. */
1021 input_vid_to_vlan(const struct xbundle *in_xbundle, uint16_t vid)
1023 switch (in_xbundle->vlan_mode) {
1024 case PORT_VLAN_ACCESS:
1025 return in_xbundle->vlan;
1028 case PORT_VLAN_TRUNK:
1031 case PORT_VLAN_NATIVE_UNTAGGED:
1032 case PORT_VLAN_NATIVE_TAGGED:
1033 return vid ? vid : in_xbundle->vlan;
1040 /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'.
1041 * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs
1044 * 'vid' should be the VID obtained from the 802.1Q header that was received as
1045 * part of a packet (specify 0 if there was no 802.1Q header), in the range
1048 input_vid_is_valid(uint16_t vid, struct xbundle *in_xbundle, bool warn)
1050 /* Allow any VID on the OFPP_NONE port. */
1051 if (in_xbundle == &ofpp_none_bundle) {
1055 switch (in_xbundle->vlan_mode) {
1056 case PORT_VLAN_ACCESS:
1059 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1060 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" tagged "
1061 "packet received on port %s configured as VLAN "
1062 "%"PRIu16" access port", vid, in_xbundle->name,
1069 case PORT_VLAN_NATIVE_UNTAGGED:
1070 case PORT_VLAN_NATIVE_TAGGED:
1072 /* Port must always carry its native VLAN. */
1076 case PORT_VLAN_TRUNK:
1077 if (!xbundle_includes_vlan(in_xbundle, vid)) {
1079 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1080 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" packet "
1081 "received on port %s not configured for trunking "
1082 "VLAN %"PRIu16, vid, in_xbundle->name, vid);
1094 /* Given 'vlan', the VLAN that a packet belongs to, and
1095 * 'out_xbundle', a bundle on which the packet is to be output, returns the VID
1096 * that should be included in the 802.1Q header. (If the return value is 0,
1097 * then the 802.1Q header should only be included in the packet if there is a
1100 * Both 'vlan' and the return value are in the range 0...4095. */
1102 output_vlan_to_vid(const struct xbundle *out_xbundle, uint16_t vlan)
1104 switch (out_xbundle->vlan_mode) {
1105 case PORT_VLAN_ACCESS:
1108 case PORT_VLAN_TRUNK:
1109 case PORT_VLAN_NATIVE_TAGGED:
1112 case PORT_VLAN_NATIVE_UNTAGGED:
1113 return vlan == out_xbundle->vlan ? 0 : vlan;
1121 output_normal(struct xlate_ctx *ctx, const struct xbundle *out_xbundle,
1124 ovs_be16 *flow_tci = &ctx->xin->flow.vlan_tci;
1126 ovs_be16 tci, old_tci;
1127 struct xport *xport;
1129 vid = output_vlan_to_vid(out_xbundle, vlan);
1130 if (list_is_empty(&out_xbundle->xports)) {
1131 /* Partially configured bundle with no slaves. Drop the packet. */
1133 } else if (!out_xbundle->bond) {
1134 xport = CONTAINER_OF(list_front(&out_xbundle->xports), struct xport,
1137 struct ofport_dpif *ofport;
1139 ofport = bond_choose_output_slave(out_xbundle->bond, &ctx->xin->flow,
1140 &ctx->xout->wc, vid);
1141 xport = xport_lookup(ofport);
1144 /* No slaves enabled, so drop packet. */
1148 if (ctx->xin->resubmit_stats) {
1149 bond_account(out_xbundle->bond, &ctx->xin->flow, vid,
1150 ctx->xin->resubmit_stats->n_bytes);
1154 old_tci = *flow_tci;
1156 if (tci || out_xbundle->use_priority_tags) {
1157 tci |= *flow_tci & htons(VLAN_PCP_MASK);
1159 tci |= htons(VLAN_CFI);
1164 compose_output_action(ctx, xport->ofp_port);
1165 *flow_tci = old_tci;
1168 /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after
1169 * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to
1170 * indicate this; newer upstream kernels use gratuitous ARP requests. */
1172 is_gratuitous_arp(const struct flow *flow, struct flow_wildcards *wc)
1174 if (flow->dl_type != htons(ETH_TYPE_ARP)) {
1178 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1179 if (!eth_addr_is_broadcast(flow->dl_dst)) {
1183 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
1184 if (flow->nw_proto == ARP_OP_REPLY) {
1186 } else if (flow->nw_proto == ARP_OP_REQUEST) {
1187 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
1188 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
1190 return flow->nw_src == flow->nw_dst;
1196 /* Checks whether a MAC learning update is necessary for MAC learning table
1197 * 'ml' given that a packet matching 'flow' was received on 'in_xbundle' in
1200 * Most packets processed through the MAC learning table do not actually
1201 * change it in any way. This function requires only a read lock on the MAC
1202 * learning table, so it is much cheaper in this common case.
1204 * Keep the code here synchronized with that in update_learning_table__()
1207 is_mac_learning_update_needed(const struct mac_learning *ml,
1208 const struct flow *flow,
1209 struct flow_wildcards *wc,
1210 int vlan, struct xbundle *in_xbundle)
1211 OVS_REQ_RDLOCK(ml->rwlock)
1213 struct mac_entry *mac;
1215 if (!mac_learning_may_learn(ml, flow->dl_src, vlan)) {
1219 mac = mac_learning_lookup(ml, flow->dl_src, vlan);
1220 if (!mac || mac_entry_age(ml, mac)) {
1224 if (is_gratuitous_arp(flow, wc)) {
1225 /* We don't want to learn from gratuitous ARP packets that are
1226 * reflected back over bond slaves so we lock the learning table. */
1227 if (!in_xbundle->bond) {
1229 } else if (mac_entry_is_grat_arp_locked(mac)) {
1234 return mac->port.p != in_xbundle->ofbundle;
1238 /* Updates MAC learning table 'ml' given that a packet matching 'flow' was
1239 * received on 'in_xbundle' in 'vlan'.
1241 * This code repeats all the checks in is_mac_learning_update_needed() because
1242 * the lock was released between there and here and thus the MAC learning state
1243 * could have changed.
1245 * Keep the code here synchronized with that in is_mac_learning_update_needed()
1248 update_learning_table__(const struct xbridge *xbridge,
1249 const struct flow *flow, struct flow_wildcards *wc,
1250 int vlan, struct xbundle *in_xbundle)
1251 OVS_REQ_WRLOCK(xbridge->ml->rwlock)
1253 struct mac_entry *mac;
1255 if (!mac_learning_may_learn(xbridge->ml, flow->dl_src, vlan)) {
1259 mac = mac_learning_insert(xbridge->ml, flow->dl_src, vlan);
1260 if (is_gratuitous_arp(flow, wc)) {
1261 /* We don't want to learn from gratuitous ARP packets that are
1262 * reflected back over bond slaves so we lock the learning table. */
1263 if (!in_xbundle->bond) {
1264 mac_entry_set_grat_arp_lock(mac);
1265 } else if (mac_entry_is_grat_arp_locked(mac)) {
1270 if (mac->port.p != in_xbundle->ofbundle) {
1271 /* The log messages here could actually be useful in debugging,
1272 * so keep the rate limit relatively high. */
1273 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
1275 VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
1276 "on port %s in VLAN %d",
1277 xbridge->name, ETH_ADDR_ARGS(flow->dl_src),
1278 in_xbundle->name, vlan);
1280 mac->port.p = in_xbundle->ofbundle;
1281 mac_learning_changed(xbridge->ml);
1286 update_learning_table(const struct xbridge *xbridge,
1287 const struct flow *flow, struct flow_wildcards *wc,
1288 int vlan, struct xbundle *in_xbundle)
1292 /* Don't learn the OFPP_NONE port. */
1293 if (in_xbundle == &ofpp_none_bundle) {
1297 /* First try the common case: no change to MAC learning table. */
1298 ovs_rwlock_rdlock(&xbridge->ml->rwlock);
1299 need_update = is_mac_learning_update_needed(xbridge->ml, flow, wc, vlan,
1301 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1304 /* Slow path: MAC learning table might need an update. */
1305 ovs_rwlock_wrlock(&xbridge->ml->rwlock);
1306 update_learning_table__(xbridge, flow, wc, vlan, in_xbundle);
1307 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1311 /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or
1312 * dropped. Returns true if they may be forwarded, false if they should be
1315 * 'in_port' must be the xport that corresponds to flow->in_port.
1316 * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull).
1318 * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as
1319 * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as
1320 * checked by input_vid_is_valid().
1322 * May also add tags to '*tags', although the current implementation only does
1323 * so in one special case.
1326 is_admissible(struct xlate_ctx *ctx, struct xport *in_port,
1329 struct xbundle *in_xbundle = in_port->xbundle;
1330 const struct xbridge *xbridge = ctx->xbridge;
1331 struct flow *flow = &ctx->xin->flow;
1333 /* Drop frames for reserved multicast addresses
1334 * only if forward_bpdu option is absent. */
1335 if (!xbridge->forward_bpdu && eth_addr_is_reserved(flow->dl_dst)) {
1336 xlate_report(ctx, "packet has reserved destination MAC, dropping");
1340 if (in_xbundle->bond) {
1341 struct mac_entry *mac;
1343 switch (bond_check_admissibility(in_xbundle->bond, in_port->ofport,
1349 xlate_report(ctx, "bonding refused admissibility, dropping");
1352 case BV_DROP_IF_MOVED:
1353 ovs_rwlock_rdlock(&xbridge->ml->rwlock);
1354 mac = mac_learning_lookup(xbridge->ml, flow->dl_src, vlan);
1355 if (mac && mac->port.p != in_xbundle->ofbundle &&
1356 (!is_gratuitous_arp(flow, &ctx->xout->wc)
1357 || mac_entry_is_grat_arp_locked(mac))) {
1358 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1359 xlate_report(ctx, "SLB bond thinks this packet looped back, "
1363 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1372 xlate_normal(struct xlate_ctx *ctx)
1374 struct flow_wildcards *wc = &ctx->xout->wc;
1375 struct flow *flow = &ctx->xin->flow;
1376 struct xbundle *in_xbundle;
1377 struct xport *in_port;
1378 struct mac_entry *mac;
1383 ctx->xout->has_normal = true;
1385 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
1386 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1387 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
1389 in_xbundle = lookup_input_bundle(ctx->xbridge, flow->in_port.ofp_port,
1390 ctx->xin->packet != NULL, &in_port);
1392 xlate_report(ctx, "no input bundle, dropping");
1396 /* Drop malformed frames. */
1397 if (flow->dl_type == htons(ETH_TYPE_VLAN) &&
1398 !(flow->vlan_tci & htons(VLAN_CFI))) {
1399 if (ctx->xin->packet != NULL) {
1400 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1401 VLOG_WARN_RL(&rl, "bridge %s: dropping packet with partial "
1402 "VLAN tag received on port %s",
1403 ctx->xbridge->name, in_xbundle->name);
1405 xlate_report(ctx, "partial VLAN tag, dropping");
1409 /* Drop frames on bundles reserved for mirroring. */
1410 if (xbundle_mirror_out(ctx->xbridge, in_xbundle)) {
1411 if (ctx->xin->packet != NULL) {
1412 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1413 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
1414 "%s, which is reserved exclusively for mirroring",
1415 ctx->xbridge->name, in_xbundle->name);
1417 xlate_report(ctx, "input port is mirror output port, dropping");
1422 vid = vlan_tci_to_vid(flow->vlan_tci);
1423 if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) {
1424 xlate_report(ctx, "disallowed VLAN VID for this input port, dropping");
1427 vlan = input_vid_to_vlan(in_xbundle, vid);
1429 /* Check other admissibility requirements. */
1430 if (in_port && !is_admissible(ctx, in_port, vlan)) {
1434 /* Learn source MAC. */
1435 if (ctx->xin->may_learn) {
1436 update_learning_table(ctx->xbridge, flow, wc, vlan, in_xbundle);
1439 /* Determine output bundle. */
1440 ovs_rwlock_rdlock(&ctx->xbridge->ml->rwlock);
1441 mac = mac_learning_lookup(ctx->xbridge->ml, flow->dl_dst, vlan);
1442 mac_port = mac ? mac->port.p : NULL;
1443 ovs_rwlock_unlock(&ctx->xbridge->ml->rwlock);
1446 struct xbundle *mac_xbundle = xbundle_lookup(mac_port);
1447 if (mac_xbundle && mac_xbundle != in_xbundle) {
1448 xlate_report(ctx, "forwarding to learned port");
1449 output_normal(ctx, mac_xbundle, vlan);
1450 } else if (!mac_xbundle) {
1451 xlate_report(ctx, "learned port is unknown, dropping");
1453 xlate_report(ctx, "learned port is input port, dropping");
1456 struct xbundle *xbundle;
1458 xlate_report(ctx, "no learned MAC for destination, flooding");
1459 LIST_FOR_EACH (xbundle, list_node, &ctx->xbridge->xbundles) {
1460 if (xbundle != in_xbundle
1461 && xbundle_includes_vlan(xbundle, vlan)
1462 && xbundle->floodable
1463 && !xbundle_mirror_out(ctx->xbridge, xbundle)) {
1464 output_normal(ctx, xbundle, vlan);
1467 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
1471 /* Compose SAMPLE action for sFlow or IPFIX. The given probability is
1472 * the number of packets out of UINT32_MAX to sample. The given
1473 * cookie is passed back in the callback for each sampled packet.
1476 compose_sample_action(const struct xbridge *xbridge,
1477 struct ofpbuf *odp_actions,
1478 const struct flow *flow,
1479 const uint32_t probability,
1480 const union user_action_cookie *cookie,
1481 const size_t cookie_size)
1483 size_t sample_offset, actions_offset;
1484 odp_port_t odp_port;
1488 sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE);
1490 nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability);
1492 actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS);
1494 odp_port = ofp_port_to_odp_port(xbridge, flow->in_port.ofp_port);
1495 pid = dpif_port_get_pid(xbridge->dpif, odp_port, 0);
1496 cookie_offset = odp_put_userspace_action(pid, cookie, cookie_size, odp_actions);
1498 nl_msg_end_nested(odp_actions, actions_offset);
1499 nl_msg_end_nested(odp_actions, sample_offset);
1500 return cookie_offset;
1504 compose_sflow_cookie(const struct xbridge *xbridge, ovs_be16 vlan_tci,
1505 odp_port_t odp_port, unsigned int n_outputs,
1506 union user_action_cookie *cookie)
1510 cookie->type = USER_ACTION_COOKIE_SFLOW;
1511 cookie->sflow.vlan_tci = vlan_tci;
1513 /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output
1514 * port information") for the interpretation of cookie->output. */
1515 switch (n_outputs) {
1517 /* 0x40000000 | 256 means "packet dropped for unknown reason". */
1518 cookie->sflow.output = 0x40000000 | 256;
1522 ifindex = dpif_sflow_odp_port_to_ifindex(xbridge->sflow, odp_port);
1524 cookie->sflow.output = ifindex;
1529 /* 0x80000000 means "multiple output ports. */
1530 cookie->sflow.output = 0x80000000 | n_outputs;
1535 /* Compose SAMPLE action for sFlow bridge sampling. */
1537 compose_sflow_action(const struct xbridge *xbridge,
1538 struct ofpbuf *odp_actions,
1539 const struct flow *flow,
1540 odp_port_t odp_port)
1542 uint32_t probability;
1543 union user_action_cookie cookie;
1545 if (!xbridge->sflow || flow->in_port.ofp_port == OFPP_NONE) {
1549 probability = dpif_sflow_get_probability(xbridge->sflow);
1550 compose_sflow_cookie(xbridge, htons(0), odp_port,
1551 odp_port == ODPP_NONE ? 0 : 1, &cookie);
1553 return compose_sample_action(xbridge, odp_actions, flow, probability,
1554 &cookie, sizeof cookie.sflow);
1558 compose_flow_sample_cookie(uint16_t probability, uint32_t collector_set_id,
1559 uint32_t obs_domain_id, uint32_t obs_point_id,
1560 union user_action_cookie *cookie)
1562 cookie->type = USER_ACTION_COOKIE_FLOW_SAMPLE;
1563 cookie->flow_sample.probability = probability;
1564 cookie->flow_sample.collector_set_id = collector_set_id;
1565 cookie->flow_sample.obs_domain_id = obs_domain_id;
1566 cookie->flow_sample.obs_point_id = obs_point_id;
1570 compose_ipfix_cookie(union user_action_cookie *cookie)
1572 cookie->type = USER_ACTION_COOKIE_IPFIX;
1575 /* Compose SAMPLE action for IPFIX bridge sampling. */
1577 compose_ipfix_action(const struct xbridge *xbridge,
1578 struct ofpbuf *odp_actions,
1579 const struct flow *flow)
1581 uint32_t probability;
1582 union user_action_cookie cookie;
1584 if (!xbridge->ipfix || flow->in_port.ofp_port == OFPP_NONE) {
1588 probability = dpif_ipfix_get_bridge_exporter_probability(xbridge->ipfix);
1589 compose_ipfix_cookie(&cookie);
1591 compose_sample_action(xbridge, odp_actions, flow, probability,
1592 &cookie, sizeof cookie.ipfix);
1595 /* SAMPLE action for sFlow must be first action in any given list of
1596 * actions. At this point we do not have all information required to
1597 * build it. So try to build sample action as complete as possible. */
1599 add_sflow_action(struct xlate_ctx *ctx)
1601 ctx->user_cookie_offset = compose_sflow_action(ctx->xbridge,
1602 &ctx->xout->odp_actions,
1603 &ctx->xin->flow, ODPP_NONE);
1604 ctx->sflow_odp_port = 0;
1605 ctx->sflow_n_outputs = 0;
1608 /* SAMPLE action for IPFIX must be 1st or 2nd action in any given list
1609 * of actions, eventually after the SAMPLE action for sFlow. */
1611 add_ipfix_action(struct xlate_ctx *ctx)
1613 compose_ipfix_action(ctx->xbridge, &ctx->xout->odp_actions,
1617 /* Fix SAMPLE action according to data collected while composing ODP actions.
1618 * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested
1619 * USERSPACE action's user-cookie which is required for sflow. */
1621 fix_sflow_action(struct xlate_ctx *ctx)
1623 const struct flow *base = &ctx->base_flow;
1624 union user_action_cookie *cookie;
1626 if (!ctx->user_cookie_offset) {
1630 cookie = ofpbuf_at(&ctx->xout->odp_actions, ctx->user_cookie_offset,
1631 sizeof cookie->sflow);
1632 ovs_assert(cookie->type == USER_ACTION_COOKIE_SFLOW);
1634 compose_sflow_cookie(ctx->xbridge, base->vlan_tci,
1635 ctx->sflow_odp_port, ctx->sflow_n_outputs, cookie);
1638 static enum slow_path_reason
1639 process_special(struct xlate_ctx *ctx, const struct flow *flow,
1640 const struct xport *xport, const struct ofpbuf *packet)
1642 struct flow_wildcards *wc = &ctx->xout->wc;
1643 const struct xbridge *xbridge = ctx->xbridge;
1647 } else if (xport->cfm && cfm_should_process_flow(xport->cfm, flow, wc)) {
1649 cfm_process_heartbeat(xport->cfm, packet);
1652 } else if (xport->bfd && bfd_should_process_flow(xport->bfd, flow, wc)) {
1654 bfd_process_packet(xport->bfd, flow, packet);
1655 /* If POLL received, immediately sends FINAL back. */
1656 if (bfd_should_send_packet(xport->bfd)) {
1658 ofproto_dpif_monitor_port_send_soon(xport->ofport);
1660 ofproto_dpif_monitor_port_send_soon_safe(xport->ofport);
1665 } else if (xport->xbundle && xport->xbundle->lacp
1666 && flow->dl_type == htons(ETH_TYPE_LACP)) {
1668 lacp_process_packet(xport->xbundle->lacp, xport->ofport, packet);
1671 } else if (xbridge->stp && stp_should_process_flow(flow, wc)) {
1673 stp_process_packet(xport, packet);
1682 compose_output_action__(struct xlate_ctx *ctx, ofp_port_t ofp_port,
1685 const struct xport *xport = get_ofp_port(ctx->xbridge, ofp_port);
1686 struct flow_wildcards *wc = &ctx->xout->wc;
1687 struct flow *flow = &ctx->xin->flow;
1688 ovs_be16 flow_vlan_tci;
1689 uint32_t flow_pkt_mark;
1690 uint8_t flow_nw_tos;
1691 odp_port_t out_port, odp_port;
1694 /* If 'struct flow' gets additional metadata, we'll need to zero it out
1695 * before traversing a patch port. */
1696 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 25);
1699 xlate_report(ctx, "Nonexistent output port");
1701 } else if (xport->config & OFPUTIL_PC_NO_FWD) {
1702 xlate_report(ctx, "OFPPC_NO_FWD set, skipping output");
1704 } else if (check_stp) {
1705 if (eth_addr_equals(ctx->base_flow.dl_dst, eth_addr_stp)) {
1706 if (!xport_stp_listen_state(xport)) {
1707 xlate_report(ctx, "STP not in listening state, "
1708 "skipping bpdu output");
1711 } else if (!xport_stp_forward_state(xport)) {
1712 xlate_report(ctx, "STP not in forwarding state, "
1718 if (mbridge_has_mirrors(ctx->xbridge->mbridge) && xport->xbundle) {
1719 ctx->xout->mirrors |= xbundle_mirror_dst(xport->xbundle->xbridge,
1724 const struct xport *peer = xport->peer;
1725 struct flow old_flow = ctx->xin->flow;
1726 enum slow_path_reason special;
1728 ctx->xbridge = peer->xbridge;
1729 flow->in_port.ofp_port = peer->ofp_port;
1730 flow->metadata = htonll(0);
1731 memset(&flow->tunnel, 0, sizeof flow->tunnel);
1732 memset(flow->regs, 0, sizeof flow->regs);
1734 special = process_special(ctx, &ctx->xin->flow, peer,
1737 ctx->xout->slow |= special;
1738 } else if (may_receive(peer, ctx)) {
1739 if (xport_stp_forward_state(peer)) {
1740 xlate_table_action(ctx, flow->in_port.ofp_port, 0, true, true);
1742 /* Forwarding is disabled by STP. Let OFPP_NORMAL and the
1743 * learning action look at the packet, then drop it. */
1744 struct flow old_base_flow = ctx->base_flow;
1745 size_t old_size = ofpbuf_size(&ctx->xout->odp_actions);
1746 mirror_mask_t old_mirrors = ctx->xout->mirrors;
1747 xlate_table_action(ctx, flow->in_port.ofp_port, 0, true, true);
1748 ctx->xout->mirrors = old_mirrors;
1749 ctx->base_flow = old_base_flow;
1750 ofpbuf_set_size(&ctx->xout->odp_actions, old_size);
1754 ctx->xin->flow = old_flow;
1755 ctx->xbridge = xport->xbridge;
1757 if (ctx->xin->resubmit_stats) {
1758 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
1759 netdev_vport_inc_rx(peer->netdev, ctx->xin->resubmit_stats);
1761 bfd_account_rx(peer->bfd, ctx->xin->resubmit_stats);
1768 flow_vlan_tci = flow->vlan_tci;
1769 flow_pkt_mark = flow->pkt_mark;
1770 flow_nw_tos = flow->nw_tos;
1772 if (dscp_from_skb_priority(xport, flow->skb_priority, &dscp)) {
1773 wc->masks.nw_tos |= IP_ECN_MASK;
1774 flow->nw_tos &= ~IP_DSCP_MASK;
1775 flow->nw_tos |= dscp;
1778 if (xport->is_tunnel) {
1779 /* Save tunnel metadata so that changes made due to
1780 * the Logical (tunnel) Port are not visible for any further
1781 * matches, while explicit set actions on tunnel metadata are.
1783 struct flow_tnl flow_tnl = flow->tunnel;
1784 odp_port = tnl_port_send(xport->ofport, flow, &ctx->xout->wc);
1785 if (odp_port == ODPP_NONE) {
1786 xlate_report(ctx, "Tunneling decided against output");
1787 goto out; /* restore flow_nw_tos */
1789 if (flow->tunnel.ip_dst == ctx->orig_tunnel_ip_dst) {
1790 xlate_report(ctx, "Not tunneling to our own address");
1791 goto out; /* restore flow_nw_tos */
1793 if (ctx->xin->resubmit_stats) {
1794 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
1796 out_port = odp_port;
1797 commit_odp_tunnel_action(flow, &ctx->base_flow,
1798 &ctx->xout->odp_actions);
1799 flow->tunnel = flow_tnl; /* Restore tunnel metadata */
1801 odp_port = xport->odp_port;
1802 out_port = odp_port;
1803 if (ofproto_has_vlan_splinters(ctx->xbridge->ofproto)) {
1804 ofp_port_t vlandev_port;
1806 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
1807 vlandev_port = vsp_realdev_to_vlandev(ctx->xbridge->ofproto,
1808 ofp_port, flow->vlan_tci);
1809 if (vlandev_port != ofp_port) {
1810 out_port = ofp_port_to_odp_port(ctx->xbridge, vlandev_port);
1811 flow->vlan_tci = htons(0);
1816 if (out_port != ODPP_NONE) {
1817 ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow,
1818 &ctx->xout->odp_actions,
1820 nl_msg_put_odp_port(&ctx->xout->odp_actions, OVS_ACTION_ATTR_OUTPUT,
1823 ctx->sflow_odp_port = odp_port;
1824 ctx->sflow_n_outputs++;
1825 ctx->xout->nf_output_iface = ofp_port;
1830 flow->vlan_tci = flow_vlan_tci;
1831 flow->pkt_mark = flow_pkt_mark;
1832 flow->nw_tos = flow_nw_tos;
1836 compose_output_action(struct xlate_ctx *ctx, ofp_port_t ofp_port)
1838 compose_output_action__(ctx, ofp_port, true);
1842 xlate_recursively(struct xlate_ctx *ctx, struct rule_dpif *rule)
1844 struct rule_dpif *old_rule = ctx->rule;
1845 struct rule_actions *actions;
1847 if (ctx->xin->resubmit_stats) {
1848 rule_dpif_credit_stats(rule, ctx->xin->resubmit_stats);
1854 actions = rule_dpif_get_actions(rule);
1855 do_xlate_actions(actions->ofpacts, actions->ofpacts_len, ctx);
1856 ctx->rule = old_rule;
1861 xlate_resubmit_resource_check(struct xlate_ctx *ctx)
1863 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
1865 if (ctx->recurse >= MAX_RESUBMIT_RECURSION) {
1866 VLOG_ERR_RL(&rl, "resubmit actions recursed over %d times",
1867 MAX_RESUBMIT_RECURSION);
1868 } else if (ctx->resubmits >= MAX_RESUBMITS) {
1869 VLOG_ERR_RL(&rl, "over %d resubmit actions", MAX_RESUBMITS);
1870 } else if (ofpbuf_size(&ctx->xout->odp_actions) > UINT16_MAX) {
1871 VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of actions");
1872 } else if (ofpbuf_size(&ctx->stack) >= 65536) {
1873 VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of stack");
1882 xlate_table_action(struct xlate_ctx *ctx, ofp_port_t in_port, uint8_t table_id,
1883 bool may_packet_in, bool honor_table_miss)
1885 if (xlate_resubmit_resource_check(ctx)) {
1886 ofp_port_t old_in_port = ctx->xin->flow.in_port.ofp_port;
1887 bool skip_wildcards = ctx->xin->skip_wildcards;
1888 uint8_t old_table_id = ctx->table_id;
1889 struct rule_dpif *rule;
1890 enum rule_dpif_lookup_verdict verdict;
1891 enum ofputil_port_config config = 0;
1893 ctx->table_id = table_id;
1895 /* Look up a flow with 'in_port' as the input port. Then restore the
1896 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
1897 * have surprising behavior). */
1898 ctx->xin->flow.in_port.ofp_port = in_port;
1899 verdict = rule_dpif_lookup_from_table(ctx->xbridge->ofproto,
1902 ? &ctx->xout->wc : NULL,
1904 &ctx->table_id, &rule);
1905 ctx->xin->flow.in_port.ofp_port = old_in_port;
1907 if (ctx->xin->resubmit_hook) {
1908 ctx->xin->resubmit_hook(ctx->xin, rule, ctx->recurse);
1912 case RULE_DPIF_LOOKUP_VERDICT_MATCH:
1914 case RULE_DPIF_LOOKUP_VERDICT_CONTROLLER:
1915 if (may_packet_in) {
1916 struct xport *xport;
1918 xport = get_ofp_port(ctx->xbridge,
1919 ctx->xin->flow.in_port.ofp_port);
1920 config = xport ? xport->config : 0;
1923 /* Fall through to drop */
1924 case RULE_DPIF_LOOKUP_VERDICT_DROP:
1925 config = OFPUTIL_PC_NO_PACKET_IN;
1927 case RULE_DPIF_LOOKUP_VERDICT_DEFAULT:
1928 if (!ofproto_dpif_wants_packet_in_on_miss(ctx->xbridge->ofproto)) {
1929 config = OFPUTIL_PC_NO_PACKET_IN;
1936 choose_miss_rule(config, ctx->xbridge->miss_rule,
1937 ctx->xbridge->no_packet_in_rule, &rule);
1941 xlate_recursively(ctx, rule);
1942 rule_dpif_unref(rule);
1945 ctx->table_id = old_table_id;
1953 xlate_group_bucket(struct xlate_ctx *ctx, const struct ofputil_bucket *bucket)
1955 uint64_t action_list_stub[1024 / 8];
1956 struct ofpbuf action_list, action_set;
1958 ofpbuf_use_const(&action_set, bucket->ofpacts, bucket->ofpacts_len);
1959 ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub);
1961 ofpacts_execute_action_set(&action_list, &action_set);
1963 do_xlate_actions(ofpbuf_data(&action_list), ofpbuf_size(&action_list), ctx);
1966 ofpbuf_uninit(&action_set);
1967 ofpbuf_uninit(&action_list);
1971 xlate_all_group(struct xlate_ctx *ctx, struct group_dpif *group)
1973 const struct ofputil_bucket *bucket;
1974 const struct list *buckets;
1975 struct flow old_flow = ctx->xin->flow;
1977 group_dpif_get_buckets(group, &buckets);
1979 LIST_FOR_EACH (bucket, list_node, buckets) {
1980 xlate_group_bucket(ctx, bucket);
1981 /* Roll back flow to previous state.
1982 * This is equivalent to cloning the packet for each bucket.
1984 * As a side effect any subsequently applied actions will
1985 * also effectively be applied to a clone of the packet taken
1986 * just before applying the all or indirect group. */
1987 ctx->xin->flow = old_flow;
1992 xlate_ff_group(struct xlate_ctx *ctx, struct group_dpif *group)
1994 const struct ofputil_bucket *bucket;
1996 bucket = group_first_live_bucket(ctx, group, 0);
1998 xlate_group_bucket(ctx, bucket);
2003 xlate_select_group(struct xlate_ctx *ctx, struct group_dpif *group)
2005 struct flow_wildcards *wc = &ctx->xout->wc;
2006 const struct ofputil_bucket *bucket;
2009 basis = hash_mac(ctx->xin->flow.dl_dst, 0, 0);
2010 bucket = group_best_live_bucket(ctx, group, basis);
2012 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
2013 xlate_group_bucket(ctx, bucket);
2018 xlate_group_action__(struct xlate_ctx *ctx, struct group_dpif *group)
2020 ctx->in_group = true;
2022 switch (group_dpif_get_type(group)) {
2024 case OFPGT11_INDIRECT:
2025 xlate_all_group(ctx, group);
2027 case OFPGT11_SELECT:
2028 xlate_select_group(ctx, group);
2031 xlate_ff_group(ctx, group);
2036 group_dpif_release(group);
2038 ctx->in_group = false;
2042 xlate_group_resource_check(struct xlate_ctx *ctx)
2044 if (!xlate_resubmit_resource_check(ctx)) {
2046 } else if (ctx->in_group) {
2047 /* Prevent nested translation of OpenFlow groups.
2049 * OpenFlow allows this restriction. We enforce this restriction only
2050 * because, with the current architecture, we would otherwise have to
2051 * take a possibly recursive read lock on the ofgroup rwlock, which is
2052 * unsafe given that POSIX allows taking a read lock to block if there
2053 * is a thread blocked on taking the write lock. Other solutions
2054 * without this restriction are also possible, but seem unwarranted
2055 * given the current limited use of groups. */
2056 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
2058 VLOG_ERR_RL(&rl, "cannot recursively translate OpenFlow group");
2066 xlate_group_action(struct xlate_ctx *ctx, uint32_t group_id)
2068 if (xlate_group_resource_check(ctx)) {
2069 struct group_dpif *group;
2072 got_group = group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group);
2074 xlate_group_action__(ctx, group);
2084 xlate_ofpact_resubmit(struct xlate_ctx *ctx,
2085 const struct ofpact_resubmit *resubmit)
2090 in_port = resubmit->in_port;
2091 if (in_port == OFPP_IN_PORT) {
2092 in_port = ctx->xin->flow.in_port.ofp_port;
2095 table_id = resubmit->table_id;
2096 if (table_id == 255) {
2097 table_id = ctx->table_id;
2100 xlate_table_action(ctx, in_port, table_id, false, false);
2104 flood_packets(struct xlate_ctx *ctx, bool all)
2106 const struct xport *xport;
2108 HMAP_FOR_EACH (xport, ofp_node, &ctx->xbridge->xports) {
2109 if (xport->ofp_port == ctx->xin->flow.in_port.ofp_port) {
2114 compose_output_action__(ctx, xport->ofp_port, false);
2115 } else if (!(xport->config & OFPUTIL_PC_NO_FLOOD)) {
2116 compose_output_action(ctx, xport->ofp_port);
2120 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
2124 execute_controller_action(struct xlate_ctx *ctx, int len,
2125 enum ofp_packet_in_reason reason,
2126 uint16_t controller_id)
2128 struct ofproto_packet_in *pin;
2129 struct ofpbuf *packet;
2130 struct pkt_metadata md = PKT_METADATA_INITIALIZER(0);
2132 ctx->xout->slow |= SLOW_CONTROLLER;
2133 if (!ctx->xin->packet) {
2137 packet = ofpbuf_clone(ctx->xin->packet);
2139 ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
2140 &ctx->xout->odp_actions,
2143 odp_execute_actions(NULL, packet, false, &md,
2144 ofpbuf_data(&ctx->xout->odp_actions),
2145 ofpbuf_size(&ctx->xout->odp_actions), NULL);
2147 pin = xmalloc(sizeof *pin);
2148 pin->up.packet_len = ofpbuf_size(packet);
2149 pin->up.packet = ofpbuf_steal_data(packet);
2150 pin->up.reason = reason;
2151 pin->up.table_id = ctx->table_id;
2152 pin->up.cookie = (ctx->rule
2153 ? rule_dpif_get_flow_cookie(ctx->rule)
2156 flow_get_metadata(&ctx->xin->flow, &pin->up.fmd);
2158 pin->controller_id = controller_id;
2159 pin->send_len = len;
2160 /* If a rule is a table-miss rule then this is
2161 * a table-miss handled by a table-miss rule.
2163 * Else, if rule is internal and has a controller action,
2164 * the later being implied by the rule being processed here,
2165 * then this is a table-miss handled without a table-miss rule.
2167 * Otherwise this is not a table-miss. */
2168 pin->miss_type = OFPROTO_PACKET_IN_NO_MISS;
2170 if (rule_dpif_is_table_miss(ctx->rule)) {
2171 pin->miss_type = OFPROTO_PACKET_IN_MISS_FLOW;
2172 } else if (rule_dpif_is_internal(ctx->rule)) {
2173 pin->miss_type = OFPROTO_PACKET_IN_MISS_WITHOUT_FLOW;
2176 ofproto_dpif_send_packet_in(ctx->xbridge->ofproto, pin);
2177 ofpbuf_delete(packet);
2181 compose_mpls_push_action(struct xlate_ctx *ctx, struct ofpact_push_mpls *mpls)
2183 struct flow_wildcards *wc = &ctx->xout->wc;
2184 struct flow *flow = &ctx->xin->flow;
2187 ovs_assert(eth_type_mpls(mpls->ethertype));
2189 n = flow_count_mpls_labels(flow, wc);
2191 ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow,
2192 &ctx->xout->odp_actions,
2194 } else if (n >= FLOW_MAX_MPLS_LABELS) {
2195 if (ctx->xin->packet != NULL) {
2196 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2197 VLOG_WARN_RL(&rl, "bridge %s: dropping packet on which an "
2198 "MPLS push action can't be performed as it would "
2199 "have more MPLS LSEs than the %d supported.",
2200 ctx->xbridge->name, FLOW_MAX_MPLS_LABELS);
2204 } else if (n >= ctx->xbridge->max_mpls_depth) {
2205 COVERAGE_INC(xlate_actions_mpls_overflow);
2206 ctx->xout->slow |= SLOW_ACTION;
2209 flow_push_mpls(flow, n, mpls->ethertype, wc);
2213 compose_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type)
2215 struct flow_wildcards *wc = &ctx->xout->wc;
2216 struct flow *flow = &ctx->xin->flow;
2217 int n = flow_count_mpls_labels(flow, wc);
2219 if (!flow_pop_mpls(flow, n, eth_type, wc) && n >= FLOW_MAX_MPLS_LABELS) {
2220 if (ctx->xin->packet != NULL) {
2221 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2222 VLOG_WARN_RL(&rl, "bridge %s: dropping packet on which an "
2223 "MPLS pop action can't be performed as it has "
2224 "more MPLS LSEs than the %d supported.",
2225 ctx->xbridge->name, FLOW_MAX_MPLS_LABELS);
2228 ofpbuf_clear(&ctx->xout->odp_actions);
2233 compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids)
2235 struct flow *flow = &ctx->xin->flow;
2237 if (!is_ip_any(flow)) {
2241 ctx->xout->wc.masks.nw_ttl = 0xff;
2242 if (flow->nw_ttl > 1) {
2248 for (i = 0; i < ids->n_controllers; i++) {
2249 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL,
2253 /* Stop processing for current table. */
2259 compose_set_mpls_label_action(struct xlate_ctx *ctx, ovs_be32 label)
2261 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
2262 ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_LABEL_MASK);
2263 set_mpls_lse_label(&ctx->xin->flow.mpls_lse[0], label);
2268 compose_set_mpls_tc_action(struct xlate_ctx *ctx, uint8_t tc)
2270 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
2271 ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_TC_MASK);
2272 set_mpls_lse_tc(&ctx->xin->flow.mpls_lse[0], tc);
2277 compose_set_mpls_ttl_action(struct xlate_ctx *ctx, uint8_t ttl)
2279 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
2280 ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_TTL_MASK);
2281 set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse[0], ttl);
2286 compose_dec_mpls_ttl_action(struct xlate_ctx *ctx)
2288 struct flow *flow = &ctx->xin->flow;
2289 uint8_t ttl = mpls_lse_to_ttl(flow->mpls_lse[0]);
2290 struct flow_wildcards *wc = &ctx->xout->wc;
2292 memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse);
2293 if (eth_type_mpls(flow->dl_type)) {
2296 set_mpls_lse_ttl(&flow->mpls_lse[0], ttl);
2299 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, 0);
2301 /* Stop processing for current table. */
2310 xlate_output_action(struct xlate_ctx *ctx,
2311 ofp_port_t port, uint16_t max_len, bool may_packet_in)
2313 ofp_port_t prev_nf_output_iface = ctx->xout->nf_output_iface;
2315 ctx->xout->nf_output_iface = NF_OUT_DROP;
2319 compose_output_action(ctx, ctx->xin->flow.in_port.ofp_port);
2322 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
2323 0, may_packet_in, true);
2329 flood_packets(ctx, false);
2332 flood_packets(ctx, true);
2334 case OFPP_CONTROLLER:
2335 execute_controller_action(ctx, max_len, OFPR_ACTION, 0);
2341 if (port != ctx->xin->flow.in_port.ofp_port) {
2342 compose_output_action(ctx, port);
2344 xlate_report(ctx, "skipping output to input port");
2349 if (prev_nf_output_iface == NF_OUT_FLOOD) {
2350 ctx->xout->nf_output_iface = NF_OUT_FLOOD;
2351 } else if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
2352 ctx->xout->nf_output_iface = prev_nf_output_iface;
2353 } else if (prev_nf_output_iface != NF_OUT_DROP &&
2354 ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
2355 ctx->xout->nf_output_iface = NF_OUT_MULTI;
2360 xlate_output_reg_action(struct xlate_ctx *ctx,
2361 const struct ofpact_output_reg *or)
2363 uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow);
2364 if (port <= UINT16_MAX) {
2365 union mf_subvalue value;
2367 memset(&value, 0xff, sizeof value);
2368 mf_write_subfield_flow(&or->src, &value, &ctx->xout->wc.masks);
2369 xlate_output_action(ctx, u16_to_ofp(port),
2370 or->max_len, false);
2375 xlate_enqueue_action(struct xlate_ctx *ctx,
2376 const struct ofpact_enqueue *enqueue)
2378 ofp_port_t ofp_port = enqueue->port;
2379 uint32_t queue_id = enqueue->queue;
2380 uint32_t flow_priority, priority;
2383 /* Translate queue to priority. */
2384 error = dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &priority);
2386 /* Fall back to ordinary output action. */
2387 xlate_output_action(ctx, enqueue->port, 0, false);
2391 /* Check output port. */
2392 if (ofp_port == OFPP_IN_PORT) {
2393 ofp_port = ctx->xin->flow.in_port.ofp_port;
2394 } else if (ofp_port == ctx->xin->flow.in_port.ofp_port) {
2398 /* Add datapath actions. */
2399 flow_priority = ctx->xin->flow.skb_priority;
2400 ctx->xin->flow.skb_priority = priority;
2401 compose_output_action(ctx, ofp_port);
2402 ctx->xin->flow.skb_priority = flow_priority;
2404 /* Update NetFlow output port. */
2405 if (ctx->xout->nf_output_iface == NF_OUT_DROP) {
2406 ctx->xout->nf_output_iface = ofp_port;
2407 } else if (ctx->xout->nf_output_iface != NF_OUT_FLOOD) {
2408 ctx->xout->nf_output_iface = NF_OUT_MULTI;
2413 xlate_set_queue_action(struct xlate_ctx *ctx, uint32_t queue_id)
2415 uint32_t skb_priority;
2417 if (!dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &skb_priority)) {
2418 ctx->xin->flow.skb_priority = skb_priority;
2420 /* Couldn't translate queue to a priority. Nothing to do. A warning
2421 * has already been logged. */
2426 slave_enabled_cb(ofp_port_t ofp_port, void *xbridge_)
2428 const struct xbridge *xbridge = xbridge_;
2439 case OFPP_CONTROLLER: /* Not supported by the bundle action. */
2442 port = get_ofp_port(xbridge, ofp_port);
2443 return port ? port->may_enable : false;
2448 xlate_bundle_action(struct xlate_ctx *ctx,
2449 const struct ofpact_bundle *bundle)
2453 port = bundle_execute(bundle, &ctx->xin->flow, &ctx->xout->wc,
2455 CONST_CAST(struct xbridge *, ctx->xbridge));
2456 if (bundle->dst.field) {
2457 nxm_reg_load(&bundle->dst, ofp_to_u16(port), &ctx->xin->flow,
2460 xlate_output_action(ctx, port, 0, false);
2465 xlate_learn_action(struct xlate_ctx *ctx,
2466 const struct ofpact_learn *learn)
2468 uint64_t ofpacts_stub[1024 / 8];
2469 struct ofputil_flow_mod fm;
2470 struct ofpbuf ofpacts;
2472 ctx->xout->has_learn = true;
2474 learn_mask(learn, &ctx->xout->wc);
2476 if (!ctx->xin->may_learn) {
2480 ofpbuf_use_stub(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
2481 learn_execute(learn, &ctx->xin->flow, &fm, &ofpacts);
2482 ofproto_dpif_flow_mod(ctx->xbridge->ofproto, &fm);
2483 ofpbuf_uninit(&ofpacts);
2487 xlate_fin_timeout(struct xlate_ctx *ctx,
2488 const struct ofpact_fin_timeout *oft)
2490 if (ctx->xin->tcp_flags & (TCP_FIN | TCP_RST) && ctx->rule) {
2491 rule_dpif_reduce_timeouts(ctx->rule, oft->fin_idle_timeout,
2492 oft->fin_hard_timeout);
2497 xlate_sample_action(struct xlate_ctx *ctx,
2498 const struct ofpact_sample *os)
2500 union user_action_cookie cookie;
2501 /* Scale the probability from 16-bit to 32-bit while representing
2502 * the same percentage. */
2503 uint32_t probability = (os->probability << 16) | os->probability;
2505 if (!ctx->xbridge->variable_length_userdata) {
2506 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
2508 VLOG_ERR_RL(&rl, "ignoring NXAST_SAMPLE action because datapath "
2509 "lacks support (needs Linux 3.10+ or kernel module from "
2514 ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
2515 &ctx->xout->odp_actions,
2518 compose_flow_sample_cookie(os->probability, os->collector_set_id,
2519 os->obs_domain_id, os->obs_point_id, &cookie);
2520 compose_sample_action(ctx->xbridge, &ctx->xout->odp_actions, &ctx->xin->flow,
2521 probability, &cookie, sizeof cookie.flow_sample);
2525 may_receive(const struct xport *xport, struct xlate_ctx *ctx)
2527 if (xport->config & (eth_addr_equals(ctx->xin->flow.dl_dst, eth_addr_stp)
2528 ? OFPUTIL_PC_NO_RECV_STP
2529 : OFPUTIL_PC_NO_RECV)) {
2533 /* Only drop packets here if both forwarding and learning are
2534 * disabled. If just learning is enabled, we need to have
2535 * OFPP_NORMAL and the learning action have a look at the packet
2536 * before we can drop it. */
2537 if (!xport_stp_forward_state(xport) && !xport_stp_learn_state(xport)) {
2545 xlate_write_actions(struct xlate_ctx *ctx, const struct ofpact *a)
2547 struct ofpact_nest *on = ofpact_get_WRITE_ACTIONS(a);
2548 ofpbuf_put(&ctx->action_set, on->actions, ofpact_nest_get_action_len(on));
2549 ofpact_pad(&ctx->action_set);
2553 xlate_action_set(struct xlate_ctx *ctx)
2555 uint64_t action_list_stub[1024 / 64];
2556 struct ofpbuf action_list;
2558 ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub);
2559 ofpacts_execute_action_set(&action_list, &ctx->action_set);
2560 do_xlate_actions(ofpbuf_data(&action_list), ofpbuf_size(&action_list), ctx);
2561 ofpbuf_uninit(&action_list);
2565 do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len,
2566 struct xlate_ctx *ctx)
2568 struct flow_wildcards *wc = &ctx->xout->wc;
2569 struct flow *flow = &ctx->xin->flow;
2570 const struct ofpact *a;
2572 /* dl_type already in the mask, not set below. */
2574 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
2575 struct ofpact_controller *controller;
2576 const struct ofpact_metadata *metadata;
2577 const struct ofpact_set_field *set_field;
2578 const struct mf_field *mf;
2586 xlate_output_action(ctx, ofpact_get_OUTPUT(a)->port,
2587 ofpact_get_OUTPUT(a)->max_len, true);
2591 if (xlate_group_action(ctx, ofpact_get_GROUP(a)->group_id)) {
2596 case OFPACT_CONTROLLER:
2597 controller = ofpact_get_CONTROLLER(a);
2598 execute_controller_action(ctx, controller->max_len,
2600 controller->controller_id);
2603 case OFPACT_ENQUEUE:
2604 xlate_enqueue_action(ctx, ofpact_get_ENQUEUE(a));
2607 case OFPACT_SET_VLAN_VID:
2608 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
2609 if (flow->vlan_tci & htons(VLAN_CFI) ||
2610 ofpact_get_SET_VLAN_VID(a)->push_vlan_if_needed) {
2611 flow->vlan_tci &= ~htons(VLAN_VID_MASK);
2612 flow->vlan_tci |= (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid)
2617 case OFPACT_SET_VLAN_PCP:
2618 wc->masks.vlan_tci |= htons(VLAN_PCP_MASK | VLAN_CFI);
2619 if (flow->vlan_tci & htons(VLAN_CFI) ||
2620 ofpact_get_SET_VLAN_PCP(a)->push_vlan_if_needed) {
2621 flow->vlan_tci &= ~htons(VLAN_PCP_MASK);
2622 flow->vlan_tci |= htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp
2623 << VLAN_PCP_SHIFT) | VLAN_CFI);
2627 case OFPACT_STRIP_VLAN:
2628 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
2629 flow->vlan_tci = htons(0);
2632 case OFPACT_PUSH_VLAN:
2633 /* XXX 802.1AD(QinQ) */
2634 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
2635 flow->vlan_tci = htons(VLAN_CFI);
2638 case OFPACT_SET_ETH_SRC:
2639 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
2640 memcpy(flow->dl_src, ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN);
2643 case OFPACT_SET_ETH_DST:
2644 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
2645 memcpy(flow->dl_dst, ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN);
2648 case OFPACT_SET_IPV4_SRC:
2649 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2650 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
2651 flow->nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4;
2655 case OFPACT_SET_IPV4_DST:
2656 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2657 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
2658 flow->nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4;
2662 case OFPACT_SET_IP_DSCP:
2663 if (is_ip_any(flow)) {
2664 wc->masks.nw_tos |= IP_DSCP_MASK;
2665 flow->nw_tos &= ~IP_DSCP_MASK;
2666 flow->nw_tos |= ofpact_get_SET_IP_DSCP(a)->dscp;
2670 case OFPACT_SET_IP_ECN:
2671 if (is_ip_any(flow)) {
2672 wc->masks.nw_tos |= IP_ECN_MASK;
2673 flow->nw_tos &= ~IP_ECN_MASK;
2674 flow->nw_tos |= ofpact_get_SET_IP_ECN(a)->ecn;
2678 case OFPACT_SET_IP_TTL:
2679 if (is_ip_any(flow)) {
2680 wc->masks.nw_ttl = 0xff;
2681 flow->nw_ttl = ofpact_get_SET_IP_TTL(a)->ttl;
2685 case OFPACT_SET_L4_SRC_PORT:
2686 if (is_ip_any(flow)) {
2687 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2688 memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src);
2689 flow->tp_src = htons(ofpact_get_SET_L4_SRC_PORT(a)->port);
2693 case OFPACT_SET_L4_DST_PORT:
2694 if (is_ip_any(flow)) {
2695 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2696 memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst);
2697 flow->tp_dst = htons(ofpact_get_SET_L4_DST_PORT(a)->port);
2701 case OFPACT_RESUBMIT:
2702 xlate_ofpact_resubmit(ctx, ofpact_get_RESUBMIT(a));
2705 case OFPACT_SET_TUNNEL:
2706 flow->tunnel.tun_id = htonll(ofpact_get_SET_TUNNEL(a)->tun_id);
2709 case OFPACT_SET_QUEUE:
2710 xlate_set_queue_action(ctx, ofpact_get_SET_QUEUE(a)->queue_id);
2713 case OFPACT_POP_QUEUE:
2714 flow->skb_priority = ctx->orig_skb_priority;
2717 case OFPACT_REG_MOVE:
2718 nxm_execute_reg_move(ofpact_get_REG_MOVE(a), flow, wc);
2721 case OFPACT_REG_LOAD:
2722 nxm_execute_reg_load(ofpact_get_REG_LOAD(a), flow, wc);
2725 case OFPACT_SET_FIELD:
2726 set_field = ofpact_get_SET_FIELD(a);
2727 mf = set_field->field;
2728 mf_mask_field_and_prereqs(mf, &wc->masks);
2730 /* Set field action only ever overwrites packet's outermost
2731 * applicable header fields. Do nothing if no header exists. */
2732 if ((mf->id != MFF_VLAN_VID || flow->vlan_tci & htons(VLAN_CFI))
2733 && ((mf->id != MFF_MPLS_LABEL && mf->id != MFF_MPLS_TC)
2734 || eth_type_mpls(flow->dl_type))) {
2735 mf_set_flow_value(mf, &set_field->value, flow);
2739 case OFPACT_STACK_PUSH:
2740 nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), flow, wc,
2744 case OFPACT_STACK_POP:
2745 nxm_execute_stack_pop(ofpact_get_STACK_POP(a), flow, wc,
2749 case OFPACT_PUSH_MPLS:
2750 compose_mpls_push_action(ctx, ofpact_get_PUSH_MPLS(a));
2753 case OFPACT_POP_MPLS:
2754 compose_mpls_pop_action(ctx, ofpact_get_POP_MPLS(a)->ethertype);
2757 case OFPACT_SET_MPLS_LABEL:
2758 compose_set_mpls_label_action(
2759 ctx, ofpact_get_SET_MPLS_LABEL(a)->label);
2762 case OFPACT_SET_MPLS_TC:
2763 compose_set_mpls_tc_action(ctx, ofpact_get_SET_MPLS_TC(a)->tc);
2766 case OFPACT_SET_MPLS_TTL:
2767 compose_set_mpls_ttl_action(ctx, ofpact_get_SET_MPLS_TTL(a)->ttl);
2770 case OFPACT_DEC_MPLS_TTL:
2771 if (compose_dec_mpls_ttl_action(ctx)) {
2776 case OFPACT_DEC_TTL:
2777 wc->masks.nw_ttl = 0xff;
2778 if (compose_dec_ttl(ctx, ofpact_get_DEC_TTL(a))) {
2784 /* Nothing to do. */
2787 case OFPACT_MULTIPATH:
2788 multipath_execute(ofpact_get_MULTIPATH(a), flow, wc);
2792 xlate_bundle_action(ctx, ofpact_get_BUNDLE(a));
2795 case OFPACT_OUTPUT_REG:
2796 xlate_output_reg_action(ctx, ofpact_get_OUTPUT_REG(a));
2800 xlate_learn_action(ctx, ofpact_get_LEARN(a));
2807 case OFPACT_FIN_TIMEOUT:
2808 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
2809 ctx->xout->has_fin_timeout = true;
2810 xlate_fin_timeout(ctx, ofpact_get_FIN_TIMEOUT(a));
2813 case OFPACT_CLEAR_ACTIONS:
2814 ofpbuf_clear(&ctx->action_set);
2817 case OFPACT_WRITE_ACTIONS:
2818 xlate_write_actions(ctx, a);
2821 case OFPACT_WRITE_METADATA:
2822 metadata = ofpact_get_WRITE_METADATA(a);
2823 flow->metadata &= ~metadata->mask;
2824 flow->metadata |= metadata->metadata & metadata->mask;
2828 /* Not implemented yet. */
2831 case OFPACT_GOTO_TABLE: {
2832 struct ofpact_goto_table *ogt = ofpact_get_GOTO_TABLE(a);
2834 ovs_assert(ctx->table_id < ogt->table_id);
2835 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
2836 ogt->table_id, true, true);
2841 xlate_sample_action(ctx, ofpact_get_SAMPLE(a));
2848 xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto,
2849 const struct flow *flow, struct rule_dpif *rule,
2850 uint16_t tcp_flags, const struct ofpbuf *packet)
2852 xin->ofproto = ofproto;
2854 xin->packet = packet;
2855 xin->may_learn = packet != NULL;
2857 xin->ofpacts = NULL;
2858 xin->ofpacts_len = 0;
2859 xin->tcp_flags = tcp_flags;
2860 xin->resubmit_hook = NULL;
2861 xin->report_hook = NULL;
2862 xin->resubmit_stats = NULL;
2863 xin->skip_wildcards = false;
2867 xlate_out_uninit(struct xlate_out *xout)
2870 ofpbuf_uninit(&xout->odp_actions);
2874 /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts'
2875 * into datapath actions, using 'ctx', and discards the datapath actions. */
2877 xlate_actions_for_side_effects(struct xlate_in *xin)
2879 struct xlate_out xout;
2881 xlate_actions(xin, &xout);
2882 xlate_out_uninit(&xout);
2886 xlate_report(struct xlate_ctx *ctx, const char *s)
2888 if (ctx->xin->report_hook) {
2889 ctx->xin->report_hook(ctx->xin, s, ctx->recurse);
2894 xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src)
2897 dst->slow = src->slow;
2898 dst->has_learn = src->has_learn;
2899 dst->has_normal = src->has_normal;
2900 dst->has_fin_timeout = src->has_fin_timeout;
2901 dst->nf_output_iface = src->nf_output_iface;
2902 dst->mirrors = src->mirrors;
2904 ofpbuf_use_stub(&dst->odp_actions, dst->odp_actions_stub,
2905 sizeof dst->odp_actions_stub);
2906 ofpbuf_put(&dst->odp_actions, ofpbuf_data(&src->odp_actions),
2907 ofpbuf_size(&src->odp_actions));
2910 static struct skb_priority_to_dscp *
2911 get_skb_priority(const struct xport *xport, uint32_t skb_priority)
2913 struct skb_priority_to_dscp *pdscp;
2916 hash = hash_int(skb_priority, 0);
2917 HMAP_FOR_EACH_IN_BUCKET (pdscp, hmap_node, hash, &xport->skb_priorities) {
2918 if (pdscp->skb_priority == skb_priority) {
2926 dscp_from_skb_priority(const struct xport *xport, uint32_t skb_priority,
2929 struct skb_priority_to_dscp *pdscp = get_skb_priority(xport, skb_priority);
2930 *dscp = pdscp ? pdscp->dscp : 0;
2931 return pdscp != NULL;
2935 clear_skb_priorities(struct xport *xport)
2937 struct skb_priority_to_dscp *pdscp, *next;
2939 HMAP_FOR_EACH_SAFE (pdscp, next, hmap_node, &xport->skb_priorities) {
2940 hmap_remove(&xport->skb_priorities, &pdscp->hmap_node);
2946 actions_output_to_local_port(const struct xlate_ctx *ctx)
2948 odp_port_t local_odp_port = ofp_port_to_odp_port(ctx->xbridge, OFPP_LOCAL);
2949 const struct nlattr *a;
2952 NL_ATTR_FOR_EACH_UNSAFE (a, left, ofpbuf_data(&ctx->xout->odp_actions),
2953 ofpbuf_size(&ctx->xout->odp_actions)) {
2954 if (nl_attr_type(a) == OVS_ACTION_ATTR_OUTPUT
2955 && nl_attr_get_odp_port(a) == local_odp_port) {
2962 /* Thread safe call to xlate_actions__(). */
2964 xlate_actions(struct xlate_in *xin, struct xlate_out *xout)
2965 OVS_EXCLUDED(xlate_rwlock)
2967 ovs_rwlock_rdlock(&xlate_rwlock);
2968 xlate_actions__(xin, xout);
2969 ovs_rwlock_unlock(&xlate_rwlock);
2972 /* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts'
2973 * into datapath actions in 'odp_actions', using 'ctx'.
2975 * The caller must take responsibility for eventually freeing 'xout', with
2976 * xlate_out_uninit(). */
2978 xlate_actions__(struct xlate_in *xin, struct xlate_out *xout)
2979 OVS_REQ_RDLOCK(xlate_rwlock)
2981 struct flow_wildcards *wc = &xout->wc;
2982 struct flow *flow = &xin->flow;
2983 struct rule_dpif *rule = NULL;
2985 struct rule_actions *actions = NULL;
2986 enum slow_path_reason special;
2987 const struct ofpact *ofpacts;
2988 struct xport *in_port;
2989 struct flow orig_flow;
2990 struct xlate_ctx ctx;
2995 COVERAGE_INC(xlate_actions);
2997 /* Flow initialization rules:
2998 * - 'base_flow' must match the kernel's view of the packet at the
2999 * time that action processing starts. 'flow' represents any
3000 * transformations we wish to make through actions.
3001 * - By default 'base_flow' and 'flow' are the same since the input
3002 * packet matches the output before any actions are applied.
3003 * - When using VLAN splinters, 'base_flow''s VLAN is set to the value
3004 * of the received packet as seen by the kernel. If we later output
3005 * to another device without any modifications this will cause us to
3006 * insert a new tag since the original one was stripped off by the
3008 * - Tunnel metadata as received is retained in 'flow'. This allows
3009 * tunnel metadata matching also in later tables.
3010 * Since a kernel action for setting the tunnel metadata will only be
3011 * generated with actual tunnel output, changing the tunnel metadata
3012 * values in 'flow' (such as tun_id) will only have effect with a later
3013 * tunnel output action.
3014 * - Tunnel 'base_flow' is completely cleared since that is what the
3015 * kernel does. If we wish to maintain the original values an action
3016 * needs to be generated. */
3021 ctx.xout->has_learn = false;
3022 ctx.xout->has_normal = false;
3023 ctx.xout->has_fin_timeout = false;
3024 ctx.xout->nf_output_iface = NF_OUT_DROP;
3025 ctx.xout->mirrors = 0;
3026 ofpbuf_use_stub(&ctx.xout->odp_actions, ctx.xout->odp_actions_stub,
3027 sizeof ctx.xout->odp_actions_stub);
3028 ofpbuf_reserve(&ctx.xout->odp_actions, NL_A_U32_SIZE);
3030 ctx.xbridge = xbridge_lookup(xin->ofproto);
3035 ctx.rule = xin->rule;
3037 ctx.base_flow = *flow;
3038 memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel);
3039 ctx.orig_tunnel_ip_dst = flow->tunnel.ip_dst;
3041 flow_wildcards_init_catchall(wc);
3042 memset(&wc->masks.in_port, 0xff, sizeof wc->masks.in_port);
3043 memset(&wc->masks.skb_priority, 0xff, sizeof wc->masks.skb_priority);
3044 memset(&wc->masks.dl_type, 0xff, sizeof wc->masks.dl_type);
3045 if (is_ip_any(flow)) {
3046 wc->masks.nw_frag |= FLOW_NW_FRAG_MASK;
3048 is_icmp = is_icmpv4(flow) || is_icmpv6(flow);
3050 tnl_may_send = tnl_xlate_init(&ctx.base_flow, flow, wc);
3051 if (ctx.xbridge->netflow) {
3052 netflow_mask_wc(flow, wc);
3057 ctx.in_group = false;
3058 ctx.orig_skb_priority = flow->skb_priority;
3062 if (!xin->ofpacts && !ctx.rule) {
3063 ctx.table_id = rule_dpif_lookup(ctx.xbridge->ofproto, flow,
3064 !xin->skip_wildcards ? wc : NULL,
3066 if (ctx.xin->resubmit_stats) {
3067 rule_dpif_credit_stats(rule, ctx.xin->resubmit_stats);
3071 xout->fail_open = ctx.rule && rule_dpif_is_fail_open(ctx.rule);
3074 ofpacts = xin->ofpacts;
3075 ofpacts_len = xin->ofpacts_len;
3076 } else if (ctx.rule) {
3077 actions = rule_dpif_get_actions(ctx.rule);
3078 ofpacts = actions->ofpacts;
3079 ofpacts_len = actions->ofpacts_len;
3084 ofpbuf_use_stub(&ctx.stack, ctx.init_stack, sizeof ctx.init_stack);
3085 ofpbuf_use_stub(&ctx.action_set,
3086 ctx.action_set_stub, sizeof ctx.action_set_stub);
3088 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
3089 /* Do this conditionally because the copy is expensive enough that it
3090 * shows up in profiles. */
3094 if (flow->nw_frag & FLOW_NW_FRAG_ANY) {
3095 switch (ctx.xbridge->frag) {
3096 case OFPC_FRAG_NORMAL:
3097 /* We must pretend that transport ports are unavailable. */
3098 flow->tp_src = ctx.base_flow.tp_src = htons(0);
3099 flow->tp_dst = ctx.base_flow.tp_dst = htons(0);
3102 case OFPC_FRAG_DROP:
3105 case OFPC_FRAG_REASM:
3108 case OFPC_FRAG_NX_MATCH:
3109 /* Nothing to do. */
3112 case OFPC_INVALID_TTL_TO_CONTROLLER:
3117 in_port = get_ofp_port(ctx.xbridge, flow->in_port.ofp_port);
3118 if (in_port && in_port->is_tunnel && ctx.xin->resubmit_stats) {
3119 netdev_vport_inc_rx(in_port->netdev, ctx.xin->resubmit_stats);
3121 bfd_account_rx(in_port->bfd, ctx.xin->resubmit_stats);
3125 special = process_special(&ctx, flow, in_port, ctx.xin->packet);
3127 ctx.xout->slow |= special;
3129 size_t sample_actions_len;
3131 if (flow->in_port.ofp_port
3132 != vsp_realdev_to_vlandev(ctx.xbridge->ofproto,
3133 flow->in_port.ofp_port,
3135 ctx.base_flow.vlan_tci = 0;
3138 add_sflow_action(&ctx);
3139 add_ipfix_action(&ctx);
3140 sample_actions_len = ofpbuf_size(&ctx.xout->odp_actions);
3142 if (tnl_may_send && (!in_port || may_receive(in_port, &ctx))) {
3143 do_xlate_actions(ofpacts, ofpacts_len, &ctx);
3145 /* We've let OFPP_NORMAL and the learning action look at the
3146 * packet, so drop it now if forwarding is disabled. */
3147 if (in_port && !xport_stp_forward_state(in_port)) {
3148 ofpbuf_set_size(&ctx.xout->odp_actions, sample_actions_len);
3152 if (ofpbuf_size(&ctx.action_set)) {
3153 xlate_action_set(&ctx);
3156 if (ctx.xbridge->has_in_band
3157 && in_band_must_output_to_local_port(flow)
3158 && !actions_output_to_local_port(&ctx)) {
3159 compose_output_action(&ctx, OFPP_LOCAL);
3162 fix_sflow_action(&ctx);
3164 if (mbridge_has_mirrors(ctx.xbridge->mbridge)) {
3165 add_mirror_actions(&ctx, &orig_flow);
3169 if (nl_attr_oversized(ofpbuf_size(&ctx.xout->odp_actions))) {
3170 /* These datapath actions are too big for a Netlink attribute, so we
3171 * can't hand them to the kernel directly. dpif_execute() can execute
3172 * them one by one with help, so just mark the result as SLOW_ACTION to
3173 * prevent the flow from being installed. */
3174 COVERAGE_INC(xlate_actions_oversize);
3175 ctx.xout->slow |= SLOW_ACTION;
3178 if (ctx.xin->resubmit_stats) {
3179 mirror_update_stats(ctx.xbridge->mbridge, xout->mirrors,
3180 ctx.xin->resubmit_stats->n_packets,
3181 ctx.xin->resubmit_stats->n_bytes);
3183 if (ctx.xbridge->netflow) {
3184 const struct ofpact *ofpacts;
3187 ofpacts_len = actions->ofpacts_len;
3188 ofpacts = actions->ofpacts;
3189 if (ofpacts_len == 0
3190 || ofpacts->type != OFPACT_CONTROLLER
3191 || ofpact_next(ofpacts) < ofpact_end(ofpacts, ofpacts_len)) {
3192 /* Only update netflow if we don't have controller flow. We don't
3193 * report NetFlow expiration messages for such facets because they
3194 * are just part of the control logic for the network, not real
3196 netflow_flow_update(ctx.xbridge->netflow, flow,
3197 xout->nf_output_iface,
3198 ctx.xin->resubmit_stats);
3203 ofpbuf_uninit(&ctx.stack);
3204 ofpbuf_uninit(&ctx.action_set);
3206 /* Clear the metadata and register wildcard masks, because we won't
3207 * use non-header fields as part of the cache. */
3208 flow_wildcards_clear_non_packet_fields(wc);
3210 /* ICMPv4 and ICMPv6 have 8-bit "type" and "code" fields. struct flow uses
3211 * the low 8 bits of the 16-bit tp_src and tp_dst members to represent
3212 * these fields. The datapath interface, on the other hand, represents
3213 * them with just 8 bits each. This means that if the high 8 bits of the
3214 * masks for these fields somehow become set, then they will get chopped
3215 * off by a round trip through the datapath, and revalidation will spot
3216 * that as an inconsistency and delete the flow. Avoid the problem here by
3217 * making sure that only the low 8 bits of either field can be unwildcarded
3221 wc->masks.tp_src &= htons(UINT8_MAX);
3222 wc->masks.tp_dst &= htons(UINT8_MAX);
3226 rule_dpif_unref(rule);
3229 /* Sends 'packet' out 'ofport'.
3230 * May modify 'packet'.
3231 * Returns 0 if successful, otherwise a positive errno value. */
3233 xlate_send_packet(const struct ofport_dpif *ofport, struct ofpbuf *packet)
3235 struct xport *xport;
3236 struct ofpact_output output;
3239 ofpact_init(&output.ofpact, OFPACT_OUTPUT, sizeof output);
3240 /* Use OFPP_NONE as the in_port to avoid special packet processing. */
3241 flow_extract(packet, NULL, &flow);
3242 flow.in_port.ofp_port = OFPP_NONE;
3244 ovs_rwlock_rdlock(&xlate_rwlock);
3245 xport = xport_lookup(ofport);
3247 ovs_rwlock_unlock(&xlate_rwlock);
3250 output.port = xport->ofp_port;
3252 ovs_rwlock_unlock(&xlate_rwlock);
3254 return ofproto_dpif_execute_actions(xport->xbridge->ofproto, &flow, NULL,
3255 &output.ofpact, sizeof output,