1 /* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015 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"
20 #include <arpa/inet.h>
22 #include <sys/socket.h>
23 #include <netinet/in.h>
25 #include "tnl-arp-cache.h"
30 #include "byte-order.h"
34 #include "dp-packet.h"
36 #include "dynamic-string.h"
42 #include "mac-learning.h"
43 #include "mcast-snooping.h"
44 #include "meta-flow.h"
45 #include "multipath.h"
46 #include "netdev-vport.h"
49 #include "odp-execute.h"
50 #include "ofp-actions.h"
51 #include "ofproto/ofproto-dpif-ipfix.h"
52 #include "ofproto/ofproto-dpif-mirror.h"
53 #include "ofproto/ofproto-dpif-monitor.h"
54 #include "ofproto/ofproto-dpif-sflow.h"
55 #include "ofproto/ofproto-dpif.h"
56 #include "ofproto/ofproto-provider.h"
57 #include "ovs-router.h"
58 #include "tnl-ports.h"
60 #include "openvswitch/vlog.h"
62 COVERAGE_DEFINE(xlate_actions);
63 COVERAGE_DEFINE(xlate_actions_oversize);
64 COVERAGE_DEFINE(xlate_actions_too_many_output);
66 VLOG_DEFINE_THIS_MODULE(ofproto_dpif_xlate);
68 /* Maximum depth of flow table recursion (due to resubmit actions) in a
69 * flow translation. */
70 #define MAX_RESUBMIT_RECURSION 64
71 #define MAX_INTERNAL_RESUBMITS 1 /* Max resbmits allowed using rules in
74 /* Maximum number of resubmit actions in a flow translation, whether they are
75 * recursive or not. */
76 #define MAX_RESUBMITS (MAX_RESUBMIT_RECURSION * MAX_RESUBMIT_RECURSION)
79 struct hmap_node hmap_node; /* Node in global 'xbridges' map. */
80 struct ofproto_dpif *ofproto; /* Key in global 'xbridges' map. */
82 struct ovs_list xbundles; /* Owned xbundles. */
83 struct hmap xports; /* Indexed by ofp_port. */
85 char *name; /* Name used in log messages. */
86 struct dpif *dpif; /* Datapath interface. */
87 struct mac_learning *ml; /* Mac learning handle. */
88 struct mcast_snooping *ms; /* Multicast Snooping handle. */
89 struct mbridge *mbridge; /* Mirroring. */
90 struct dpif_sflow *sflow; /* SFlow handle, or null. */
91 struct dpif_ipfix *ipfix; /* Ipfix handle, or null. */
92 struct netflow *netflow; /* Netflow handle, or null. */
93 struct stp *stp; /* STP or null if disabled. */
94 struct rstp *rstp; /* RSTP or null if disabled. */
96 bool has_in_band; /* Bridge has in band control? */
97 bool forward_bpdu; /* Bridge forwards STP BPDUs? */
99 /* Datapath feature support. */
100 struct dpif_backer_support support;
104 struct hmap_node hmap_node; /* In global 'xbundles' map. */
105 struct ofbundle *ofbundle; /* Key in global 'xbundles' map. */
107 struct ovs_list list_node; /* In parent 'xbridges' list. */
108 struct xbridge *xbridge; /* Parent xbridge. */
110 struct ovs_list xports; /* Contains "struct xport"s. */
112 char *name; /* Name used in log messages. */
113 struct bond *bond; /* Nonnull iff more than one port. */
114 struct lacp *lacp; /* LACP handle or null. */
116 enum port_vlan_mode vlan_mode; /* VLAN mode. */
117 int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */
118 unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1.
119 * NULL if all VLANs are trunked. */
120 bool use_priority_tags; /* Use 802.1p tag for frames in VLAN 0? */
121 bool floodable; /* No port has OFPUTIL_PC_NO_FLOOD set? */
125 struct hmap_node hmap_node; /* Node in global 'xports' map. */
126 struct ofport_dpif *ofport; /* Key in global 'xports map. */
128 struct hmap_node ofp_node; /* Node in parent xbridge 'xports' map. */
129 ofp_port_t ofp_port; /* Key in parent xbridge 'xports' map. */
131 odp_port_t odp_port; /* Datapath port number or ODPP_NONE. */
133 struct ovs_list bundle_node; /* In parent xbundle (if it exists). */
134 struct xbundle *xbundle; /* Parent xbundle or null. */
136 struct netdev *netdev; /* 'ofport''s netdev. */
138 struct xbridge *xbridge; /* Parent bridge. */
139 struct xport *peer; /* Patch port peer or null. */
141 enum ofputil_port_config config; /* OpenFlow port configuration. */
142 enum ofputil_port_state state; /* OpenFlow port state. */
143 int stp_port_no; /* STP port number or -1 if not in use. */
144 struct rstp_port *rstp_port; /* RSTP port or null. */
146 struct hmap skb_priorities; /* Map of 'skb_priority_to_dscp's. */
148 bool may_enable; /* May be enabled in bonds. */
149 bool is_tunnel; /* Is a tunnel port. */
151 struct cfm *cfm; /* CFM handle or null. */
152 struct bfd *bfd; /* BFD handle or null. */
153 struct lldp *lldp; /* LLDP handle or null. */
157 struct xlate_in *xin;
158 struct xlate_out *xout;
160 const struct xbridge *xbridge;
162 /* Flow tables version at the beginning of the translation. */
163 cls_version_t tables_version;
165 /* Flow at the last commit. */
166 struct flow base_flow;
168 /* Tunnel IP destination address as received. This is stored separately
169 * as the base_flow.tunnel is cleared on init to reflect the datapath
170 * behavior. Used to make sure not to send tunneled output to ourselves,
171 * which might lead to an infinite loop. This could happen easily
172 * if a tunnel is marked as 'ip_remote=flow', and the flow does not
173 * actually set the tun_dst field. */
174 ovs_be32 orig_tunnel_ip_dst;
176 /* Stack for the push and pop actions. Each stack element is of type
177 * "union mf_subvalue". */
180 /* The rule that we are currently translating, or NULL. */
181 struct rule_dpif *rule;
183 /* Flow translation populates this with wildcards relevant in translation.
184 * When 'xin->wc' is nonnull, this is the same pointer. When 'xin->wc' is
185 * null, this is a pointer to uninitialized scratch memory. This allows
186 * code to blindly write to 'ctx->wc' without worrying about whether the
187 * caller really wants wildcards. */
188 struct flow_wildcards *wc;
190 /* Output buffer for datapath actions. When 'xin->odp_actions' is nonnull,
191 * this is the same pointer. When 'xin->odp_actions' is null, this points
192 * to a scratch ofpbuf. This allows code to add actions to
193 * 'ctx->odp_actions' without worrying about whether the caller really
195 struct ofpbuf *odp_actions;
197 /* Resubmit statistics, via xlate_table_action(). */
198 int recurse; /* Current resubmit nesting depth. */
199 int resubmits; /* Total number of resubmits. */
200 bool in_group; /* Currently translating ofgroup, if true. */
201 bool in_action_set; /* Currently translating action_set, if true. */
203 uint8_t table_id; /* OpenFlow table ID where flow was found. */
204 ovs_be64 rule_cookie; /* Cookie of the rule being translated. */
205 uint32_t orig_skb_priority; /* Priority when packet arrived. */
206 uint32_t sflow_n_outputs; /* Number of output ports. */
207 odp_port_t sflow_odp_port; /* Output port for composing sFlow action. */
208 ofp_port_t nf_output_iface; /* Output interface index for NetFlow. */
209 bool exit; /* No further actions should be processed. */
210 mirror_mask_t mirrors; /* Bitmap of associated mirrors. */
212 /* These are used for non-bond recirculation. The recirculation IDs are
213 * stored in xout and must be associated with a datapath flow (ukey),
214 * otherwise they will be freed when the xout is uninitialized.
217 * Steps in Recirculation Translation
218 * ==================================
220 * At some point during translation, the code recognizes the need for
221 * recirculation. For example, recirculation is necessary when, after
222 * popping the last MPLS label, an action or a match tries to examine or
223 * modify a field that has been newly revealed following the MPLS label.
225 * The simplest part of the work to be done is to commit existing changes to
226 * the packet, which produces datapath actions corresponding to the changes,
227 * and after this, add an OVS_ACTION_ATTR_RECIRC datapath action.
229 * The main problem here is preserving state. When the datapath executes
230 * OVS_ACTION_ATTR_RECIRC, it will upcall to userspace to get a translation
231 * for the post-recirculation actions. At this point userspace has to
232 * resume the translation where it left off, which means that it has to
233 * execute the following:
235 * - The action that prompted recirculation, and any actions following
236 * it within the same flow.
238 * - If the action that prompted recirculation was invoked within a
239 * NXAST_RESUBMIT, then any actions following the resubmit. These
240 * "resubmit"s can be nested, so this has to go all the way up the
243 * - The OpenFlow 1.1+ action set.
245 * State that actions and flow table lookups can depend on, such as the
246 * following, must also be preserved:
248 * - Metadata fields (input port, registers, OF1.1+ metadata, ...).
250 * - Action set, stack
252 * - The table ID and cookie of the flow being translated at each level
253 * of the control stack (since OFPAT_CONTROLLER actions send these to
256 * Translation allows for the control of this state preservation via these
257 * members. When a need for recirculation is identified, the translation
260 * 1. Sets 'recirc_action_offset' to the current size of 'action_set'. The
261 * action set is part of what needs to be preserved, so this allows the
262 * action set and the additional state to share the 'action_set' buffer.
263 * Later steps can tell that setup for recirculation is in progress from
264 * the nonnegative value of 'recirc_action_offset'.
266 * 2. Sets 'exit' to true to tell later steps that we're exiting from the
267 * translation process.
269 * 3. Adds an OFPACT_UNROLL_XLATE action to 'action_set'. This action
270 * holds the current table ID and cookie so that they can be restored
271 * during a post-recirculation upcall translation.
273 * 4. Adds the action that prompted recirculation and any actions following
274 * it within the same flow to 'action_set', so that they can be executed
275 * during a post-recirculation upcall translation.
279 * 6. The action that prompted recirculation might be nested in a stack of
280 * nested "resubmit"s that have actions remaining. Each of these notices
281 * that we're exiting (from 'exit') and that recirculation setup is in
282 * progress (from 'recirc_action_offset') and responds by adding more
283 * OFPACT_UNROLL_XLATE actions to 'action_set', as necessary, and any
284 * actions that were yet unprocessed.
286 * The caller stores all the state produced by this process associated with
287 * the recirculation ID. For post-recirculation upcall translation, the
288 * caller passes it back in for the new translation to execute. The
289 * process yielded a set of ofpacts that can be translated directly, so it
290 * is not much of a special case at that point.
292 int recirc_action_offset; /* Offset in 'action_set' to actions to be
293 * executed after recirculation, or -1. */
294 int last_unroll_offset; /* Offset in 'action_set' to the latest unroll
297 /* True if a packet was but is no longer MPLS (due to an MPLS pop action).
298 * This is a trigger for recirculation in cases where translating an action
299 * or looking up a flow requires access to the fields of the packet after
300 * the MPLS label stack that was originally present. */
303 /* OpenFlow 1.1+ action set.
305 * 'action_set' accumulates "struct ofpact"s added by OFPACT_WRITE_ACTIONS.
306 * When translation is otherwise complete, ofpacts_execute_action_set()
307 * converts it to a set of "struct ofpact"s that can be translated into
308 * datapath actions. */
309 bool action_set_has_group; /* Action set contains OFPACT_GROUP? */
310 struct ofpbuf action_set; /* Action set. */
313 static void xlate_action_set(struct xlate_ctx *ctx);
316 ctx_trigger_recirculation(struct xlate_ctx *ctx)
319 ctx->recirc_action_offset = ctx->action_set.size;
323 ctx_first_recirculation_action(const struct xlate_ctx *ctx)
325 return ctx->recirc_action_offset == ctx->action_set.size;
329 exit_recirculates(const struct xlate_ctx *ctx)
331 /* When recirculating the 'recirc_action_offset' has a non-negative value.
333 return ctx->recirc_action_offset >= 0;
336 static void compose_recirculate_action(struct xlate_ctx *ctx);
338 /* A controller may use OFPP_NONE as the ingress port to indicate that
339 * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for
340 * when an input bundle is needed for validation (e.g., mirroring or
341 * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have
342 * any 'port' structs, so care must be taken when dealing with it. */
343 static struct xbundle ofpp_none_bundle = {
345 .vlan_mode = PORT_VLAN_TRUNK
348 /* Node in 'xport''s 'skb_priorities' map. Used to maintain a map from
349 * 'priority' (the datapath's term for QoS queue) to the dscp bits which all
350 * traffic egressing the 'ofport' with that priority should be marked with. */
351 struct skb_priority_to_dscp {
352 struct hmap_node hmap_node; /* Node in 'ofport_dpif''s 'skb_priorities'. */
353 uint32_t skb_priority; /* Priority of this queue (see struct flow). */
355 uint8_t dscp; /* DSCP bits to mark outgoing traffic with. */
371 /* xlate_cache entries hold enough information to perform the side effects of
372 * xlate_actions() for a rule, without needing to perform rule translation
373 * from scratch. The primary usage of these is to submit statistics to objects
374 * that a flow relates to, although they may be used for other effects as well
375 * (for instance, refreshing hard timeouts for learned flows). */
379 struct rule_dpif *rule;
386 struct netflow *netflow;
391 struct mbridge *mbridge;
392 mirror_mask_t mirrors;
400 struct ofproto_dpif *ofproto;
401 struct ofputil_flow_mod *fm;
402 struct ofpbuf *ofpacts;
405 struct ofproto_dpif *ofproto;
410 struct rule_dpif *rule;
415 struct group_dpif *group;
416 struct ofputil_bucket *bucket;
419 char br_name[IFNAMSIZ];
425 #define XC_ENTRY_FOR_EACH(entry, entries, xcache) \
426 entries = xcache->entries; \
427 for (entry = ofpbuf_try_pull(&entries, sizeof *entry); \
429 entry = ofpbuf_try_pull(&entries, sizeof *entry))
432 struct ofpbuf entries;
435 /* Xlate config contains hash maps of all bridges, bundles and ports.
436 * Xcfgp contains the pointer to the current xlate configuration.
437 * When the main thread needs to change the configuration, it copies xcfgp to
438 * new_xcfg and edits new_xcfg. This enables the use of RCU locking which
439 * does not block handler and revalidator threads. */
441 struct hmap xbridges;
442 struct hmap xbundles;
445 static OVSRCU_TYPE(struct xlate_cfg *) xcfgp = OVSRCU_INITIALIZER(NULL);
446 static struct xlate_cfg *new_xcfg = NULL;
448 static bool may_receive(const struct xport *, struct xlate_ctx *);
449 static void do_xlate_actions(const struct ofpact *, size_t ofpacts_len,
451 static void xlate_normal(struct xlate_ctx *);
452 static inline void xlate_report(struct xlate_ctx *, const char *, ...)
453 OVS_PRINTF_FORMAT(2, 3);
454 static void xlate_table_action(struct xlate_ctx *, ofp_port_t in_port,
455 uint8_t table_id, bool may_packet_in,
456 bool honor_table_miss);
457 static bool input_vid_is_valid(uint16_t vid, struct xbundle *, bool warn);
458 static uint16_t input_vid_to_vlan(const struct xbundle *, uint16_t vid);
459 static void output_normal(struct xlate_ctx *, const struct xbundle *,
462 /* Optional bond recirculation parameter to compose_output_action(). */
463 struct xlate_bond_recirc {
464 uint32_t recirc_id; /* !0 Use recirculation instead of output. */
465 uint8_t hash_alg; /* !0 Compute hash for recirc before. */
466 uint32_t hash_basis; /* Compute hash for recirc before. */
469 static void compose_output_action(struct xlate_ctx *, ofp_port_t ofp_port,
470 const struct xlate_bond_recirc *xr);
472 static struct xbridge *xbridge_lookup(struct xlate_cfg *,
473 const struct ofproto_dpif *);
474 static struct xbundle *xbundle_lookup(struct xlate_cfg *,
475 const struct ofbundle *);
476 static struct xport *xport_lookup(struct xlate_cfg *,
477 const struct ofport_dpif *);
478 static struct xport *get_ofp_port(const struct xbridge *, ofp_port_t ofp_port);
479 static struct skb_priority_to_dscp *get_skb_priority(const struct xport *,
480 uint32_t skb_priority);
481 static void clear_skb_priorities(struct xport *);
482 static size_t count_skb_priorities(const struct xport *);
483 static bool dscp_from_skb_priority(const struct xport *, uint32_t skb_priority,
486 static struct xc_entry *xlate_cache_add_entry(struct xlate_cache *xc,
488 static void xlate_xbridge_init(struct xlate_cfg *, struct xbridge *);
489 static void xlate_xbundle_init(struct xlate_cfg *, struct xbundle *);
490 static void xlate_xport_init(struct xlate_cfg *, struct xport *);
491 static void xlate_xbridge_set(struct xbridge *, struct dpif *,
492 const struct mac_learning *, struct stp *,
493 struct rstp *, const struct mcast_snooping *,
494 const struct mbridge *,
495 const struct dpif_sflow *,
496 const struct dpif_ipfix *,
497 const struct netflow *,
498 bool forward_bpdu, bool has_in_band,
499 const struct dpif_backer_support *);
500 static void xlate_xbundle_set(struct xbundle *xbundle,
501 enum port_vlan_mode vlan_mode, int vlan,
502 unsigned long *trunks, bool use_priority_tags,
503 const struct bond *bond, const struct lacp *lacp,
505 static void xlate_xport_set(struct xport *xport, odp_port_t odp_port,
506 const struct netdev *netdev, const struct cfm *cfm,
507 const struct bfd *bfd, const struct lldp *lldp,
508 int stp_port_no, const struct rstp_port *rstp_port,
509 enum ofputil_port_config config,
510 enum ofputil_port_state state, bool is_tunnel,
512 static void xlate_xbridge_remove(struct xlate_cfg *, struct xbridge *);
513 static void xlate_xbundle_remove(struct xlate_cfg *, struct xbundle *);
514 static void xlate_xport_remove(struct xlate_cfg *, struct xport *);
515 static void xlate_xbridge_copy(struct xbridge *);
516 static void xlate_xbundle_copy(struct xbridge *, struct xbundle *);
517 static void xlate_xport_copy(struct xbridge *, struct xbundle *,
519 static void xlate_xcfg_free(struct xlate_cfg *);
522 xlate_report(struct xlate_ctx *ctx, const char *format, ...)
524 if (OVS_UNLIKELY(ctx->xin->report_hook)) {
527 va_start(args, format);
528 ctx->xin->report_hook(ctx->xin, ctx->recurse, format, args);
534 xlate_xbridge_init(struct xlate_cfg *xcfg, struct xbridge *xbridge)
536 list_init(&xbridge->xbundles);
537 hmap_init(&xbridge->xports);
538 hmap_insert(&xcfg->xbridges, &xbridge->hmap_node,
539 hash_pointer(xbridge->ofproto, 0));
543 xlate_xbundle_init(struct xlate_cfg *xcfg, struct xbundle *xbundle)
545 list_init(&xbundle->xports);
546 list_insert(&xbundle->xbridge->xbundles, &xbundle->list_node);
547 hmap_insert(&xcfg->xbundles, &xbundle->hmap_node,
548 hash_pointer(xbundle->ofbundle, 0));
552 xlate_xport_init(struct xlate_cfg *xcfg, struct xport *xport)
554 hmap_init(&xport->skb_priorities);
555 hmap_insert(&xcfg->xports, &xport->hmap_node,
556 hash_pointer(xport->ofport, 0));
557 hmap_insert(&xport->xbridge->xports, &xport->ofp_node,
558 hash_ofp_port(xport->ofp_port));
562 xlate_xbridge_set(struct xbridge *xbridge,
564 const struct mac_learning *ml, struct stp *stp,
565 struct rstp *rstp, const struct mcast_snooping *ms,
566 const struct mbridge *mbridge,
567 const struct dpif_sflow *sflow,
568 const struct dpif_ipfix *ipfix,
569 const struct netflow *netflow,
570 bool forward_bpdu, bool has_in_band,
571 const struct dpif_backer_support *support)
573 if (xbridge->ml != ml) {
574 mac_learning_unref(xbridge->ml);
575 xbridge->ml = mac_learning_ref(ml);
578 if (xbridge->ms != ms) {
579 mcast_snooping_unref(xbridge->ms);
580 xbridge->ms = mcast_snooping_ref(ms);
583 if (xbridge->mbridge != mbridge) {
584 mbridge_unref(xbridge->mbridge);
585 xbridge->mbridge = mbridge_ref(mbridge);
588 if (xbridge->sflow != sflow) {
589 dpif_sflow_unref(xbridge->sflow);
590 xbridge->sflow = dpif_sflow_ref(sflow);
593 if (xbridge->ipfix != ipfix) {
594 dpif_ipfix_unref(xbridge->ipfix);
595 xbridge->ipfix = dpif_ipfix_ref(ipfix);
598 if (xbridge->stp != stp) {
599 stp_unref(xbridge->stp);
600 xbridge->stp = stp_ref(stp);
603 if (xbridge->rstp != rstp) {
604 rstp_unref(xbridge->rstp);
605 xbridge->rstp = rstp_ref(rstp);
608 if (xbridge->netflow != netflow) {
609 netflow_unref(xbridge->netflow);
610 xbridge->netflow = netflow_ref(netflow);
613 xbridge->dpif = dpif;
614 xbridge->forward_bpdu = forward_bpdu;
615 xbridge->has_in_band = has_in_band;
616 xbridge->support = *support;
620 xlate_xbundle_set(struct xbundle *xbundle,
621 enum port_vlan_mode vlan_mode, int vlan,
622 unsigned long *trunks, bool use_priority_tags,
623 const struct bond *bond, const struct lacp *lacp,
626 ovs_assert(xbundle->xbridge);
628 xbundle->vlan_mode = vlan_mode;
629 xbundle->vlan = vlan;
630 xbundle->trunks = trunks;
631 xbundle->use_priority_tags = use_priority_tags;
632 xbundle->floodable = floodable;
634 if (xbundle->bond != bond) {
635 bond_unref(xbundle->bond);
636 xbundle->bond = bond_ref(bond);
639 if (xbundle->lacp != lacp) {
640 lacp_unref(xbundle->lacp);
641 xbundle->lacp = lacp_ref(lacp);
646 xlate_xport_set(struct xport *xport, odp_port_t odp_port,
647 const struct netdev *netdev, const struct cfm *cfm,
648 const struct bfd *bfd, const struct lldp *lldp, int stp_port_no,
649 const struct rstp_port* rstp_port,
650 enum ofputil_port_config config, enum ofputil_port_state state,
651 bool is_tunnel, bool may_enable)
653 xport->config = config;
654 xport->state = state;
655 xport->stp_port_no = stp_port_no;
656 xport->is_tunnel = is_tunnel;
657 xport->may_enable = may_enable;
658 xport->odp_port = odp_port;
660 if (xport->rstp_port != rstp_port) {
661 rstp_port_unref(xport->rstp_port);
662 xport->rstp_port = rstp_port_ref(rstp_port);
665 if (xport->cfm != cfm) {
666 cfm_unref(xport->cfm);
667 xport->cfm = cfm_ref(cfm);
670 if (xport->bfd != bfd) {
671 bfd_unref(xport->bfd);
672 xport->bfd = bfd_ref(bfd);
675 if (xport->lldp != lldp) {
676 lldp_unref(xport->lldp);
677 xport->lldp = lldp_ref(lldp);
680 if (xport->netdev != netdev) {
681 netdev_close(xport->netdev);
682 xport->netdev = netdev_ref(netdev);
687 xlate_xbridge_copy(struct xbridge *xbridge)
689 struct xbundle *xbundle;
691 struct xbridge *new_xbridge = xzalloc(sizeof *xbridge);
692 new_xbridge->ofproto = xbridge->ofproto;
693 new_xbridge->name = xstrdup(xbridge->name);
694 xlate_xbridge_init(new_xcfg, new_xbridge);
696 xlate_xbridge_set(new_xbridge,
697 xbridge->dpif, xbridge->ml, xbridge->stp,
698 xbridge->rstp, xbridge->ms, xbridge->mbridge,
699 xbridge->sflow, xbridge->ipfix, xbridge->netflow,
700 xbridge->forward_bpdu, xbridge->has_in_band,
702 LIST_FOR_EACH (xbundle, list_node, &xbridge->xbundles) {
703 xlate_xbundle_copy(new_xbridge, xbundle);
706 /* Copy xports which are not part of a xbundle */
707 HMAP_FOR_EACH (xport, ofp_node, &xbridge->xports) {
708 if (!xport->xbundle) {
709 xlate_xport_copy(new_xbridge, NULL, xport);
715 xlate_xbundle_copy(struct xbridge *xbridge, struct xbundle *xbundle)
718 struct xbundle *new_xbundle = xzalloc(sizeof *xbundle);
719 new_xbundle->ofbundle = xbundle->ofbundle;
720 new_xbundle->xbridge = xbridge;
721 new_xbundle->name = xstrdup(xbundle->name);
722 xlate_xbundle_init(new_xcfg, new_xbundle);
724 xlate_xbundle_set(new_xbundle, xbundle->vlan_mode,
725 xbundle->vlan, xbundle->trunks,
726 xbundle->use_priority_tags, xbundle->bond, xbundle->lacp,
728 LIST_FOR_EACH (xport, bundle_node, &xbundle->xports) {
729 xlate_xport_copy(xbridge, new_xbundle, xport);
734 xlate_xport_copy(struct xbridge *xbridge, struct xbundle *xbundle,
737 struct skb_priority_to_dscp *pdscp, *new_pdscp;
738 struct xport *new_xport = xzalloc(sizeof *xport);
739 new_xport->ofport = xport->ofport;
740 new_xport->ofp_port = xport->ofp_port;
741 new_xport->xbridge = xbridge;
742 xlate_xport_init(new_xcfg, new_xport);
744 xlate_xport_set(new_xport, xport->odp_port, xport->netdev, xport->cfm,
745 xport->bfd, xport->lldp, xport->stp_port_no,
746 xport->rstp_port, xport->config, xport->state,
747 xport->is_tunnel, xport->may_enable);
750 struct xport *peer = xport_lookup(new_xcfg, xport->peer->ofport);
752 new_xport->peer = peer;
753 new_xport->peer->peer = new_xport;
758 new_xport->xbundle = xbundle;
759 list_insert(&new_xport->xbundle->xports, &new_xport->bundle_node);
762 HMAP_FOR_EACH (pdscp, hmap_node, &xport->skb_priorities) {
763 new_pdscp = xmalloc(sizeof *pdscp);
764 new_pdscp->skb_priority = pdscp->skb_priority;
765 new_pdscp->dscp = pdscp->dscp;
766 hmap_insert(&new_xport->skb_priorities, &new_pdscp->hmap_node,
767 hash_int(new_pdscp->skb_priority, 0));
771 /* Sets the current xlate configuration to new_xcfg and frees the old xlate
772 * configuration in xcfgp.
774 * This needs to be called after editing the xlate configuration.
776 * Functions that edit the new xlate configuration are
777 * xlate_<ofport/bundle/ofport>_set and xlate_<ofport/bundle/ofport>_remove.
783 * edit_xlate_configuration();
785 * xlate_txn_commit(); */
787 xlate_txn_commit(void)
789 struct xlate_cfg *xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
791 ovsrcu_set(&xcfgp, new_xcfg);
792 ovsrcu_synchronize();
793 xlate_xcfg_free(xcfg);
797 /* Copies the current xlate configuration in xcfgp to new_xcfg.
799 * This needs to be called prior to editing the xlate configuration. */
801 xlate_txn_start(void)
803 struct xbridge *xbridge;
804 struct xlate_cfg *xcfg;
806 ovs_assert(!new_xcfg);
808 new_xcfg = xmalloc(sizeof *new_xcfg);
809 hmap_init(&new_xcfg->xbridges);
810 hmap_init(&new_xcfg->xbundles);
811 hmap_init(&new_xcfg->xports);
813 xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
818 HMAP_FOR_EACH (xbridge, hmap_node, &xcfg->xbridges) {
819 xlate_xbridge_copy(xbridge);
825 xlate_xcfg_free(struct xlate_cfg *xcfg)
827 struct xbridge *xbridge, *next_xbridge;
833 HMAP_FOR_EACH_SAFE (xbridge, next_xbridge, hmap_node, &xcfg->xbridges) {
834 xlate_xbridge_remove(xcfg, xbridge);
837 hmap_destroy(&xcfg->xbridges);
838 hmap_destroy(&xcfg->xbundles);
839 hmap_destroy(&xcfg->xports);
844 xlate_ofproto_set(struct ofproto_dpif *ofproto, const char *name,
846 const struct mac_learning *ml, struct stp *stp,
847 struct rstp *rstp, const struct mcast_snooping *ms,
848 const struct mbridge *mbridge,
849 const struct dpif_sflow *sflow,
850 const struct dpif_ipfix *ipfix,
851 const struct netflow *netflow,
852 bool forward_bpdu, bool has_in_band,
853 const struct dpif_backer_support *support)
855 struct xbridge *xbridge;
857 ovs_assert(new_xcfg);
859 xbridge = xbridge_lookup(new_xcfg, ofproto);
861 xbridge = xzalloc(sizeof *xbridge);
862 xbridge->ofproto = ofproto;
864 xlate_xbridge_init(new_xcfg, xbridge);
868 xbridge->name = xstrdup(name);
870 xlate_xbridge_set(xbridge, dpif, ml, stp, rstp, ms, mbridge, sflow, ipfix,
871 netflow, forward_bpdu, has_in_band, support);
875 xlate_xbridge_remove(struct xlate_cfg *xcfg, struct xbridge *xbridge)
877 struct xbundle *xbundle, *next_xbundle;
878 struct xport *xport, *next_xport;
884 HMAP_FOR_EACH_SAFE (xport, next_xport, ofp_node, &xbridge->xports) {
885 xlate_xport_remove(xcfg, xport);
888 LIST_FOR_EACH_SAFE (xbundle, next_xbundle, list_node, &xbridge->xbundles) {
889 xlate_xbundle_remove(xcfg, xbundle);
892 hmap_remove(&xcfg->xbridges, &xbridge->hmap_node);
893 mac_learning_unref(xbridge->ml);
894 mcast_snooping_unref(xbridge->ms);
895 mbridge_unref(xbridge->mbridge);
896 dpif_sflow_unref(xbridge->sflow);
897 dpif_ipfix_unref(xbridge->ipfix);
898 stp_unref(xbridge->stp);
899 rstp_unref(xbridge->rstp);
900 hmap_destroy(&xbridge->xports);
906 xlate_remove_ofproto(struct ofproto_dpif *ofproto)
908 struct xbridge *xbridge;
910 ovs_assert(new_xcfg);
912 xbridge = xbridge_lookup(new_xcfg, ofproto);
913 xlate_xbridge_remove(new_xcfg, xbridge);
917 xlate_bundle_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
918 const char *name, enum port_vlan_mode vlan_mode, int vlan,
919 unsigned long *trunks, bool use_priority_tags,
920 const struct bond *bond, const struct lacp *lacp,
923 struct xbundle *xbundle;
925 ovs_assert(new_xcfg);
927 xbundle = xbundle_lookup(new_xcfg, ofbundle);
929 xbundle = xzalloc(sizeof *xbundle);
930 xbundle->ofbundle = ofbundle;
931 xbundle->xbridge = xbridge_lookup(new_xcfg, ofproto);
933 xlate_xbundle_init(new_xcfg, xbundle);
937 xbundle->name = xstrdup(name);
939 xlate_xbundle_set(xbundle, vlan_mode, vlan, trunks,
940 use_priority_tags, bond, lacp, floodable);
944 xlate_xbundle_remove(struct xlate_cfg *xcfg, struct xbundle *xbundle)
952 LIST_FOR_EACH_POP (xport, bundle_node, &xbundle->xports) {
953 xport->xbundle = NULL;
956 hmap_remove(&xcfg->xbundles, &xbundle->hmap_node);
957 list_remove(&xbundle->list_node);
958 bond_unref(xbundle->bond);
959 lacp_unref(xbundle->lacp);
965 xlate_bundle_remove(struct ofbundle *ofbundle)
967 struct xbundle *xbundle;
969 ovs_assert(new_xcfg);
971 xbundle = xbundle_lookup(new_xcfg, ofbundle);
972 xlate_xbundle_remove(new_xcfg, xbundle);
976 xlate_ofport_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle,
977 struct ofport_dpif *ofport, ofp_port_t ofp_port,
978 odp_port_t odp_port, const struct netdev *netdev,
979 const struct cfm *cfm, const struct bfd *bfd,
980 const struct lldp *lldp, struct ofport_dpif *peer,
981 int stp_port_no, const struct rstp_port *rstp_port,
982 const struct ofproto_port_queue *qdscp_list, size_t n_qdscp,
983 enum ofputil_port_config config,
984 enum ofputil_port_state state, bool is_tunnel,
990 ovs_assert(new_xcfg);
992 xport = xport_lookup(new_xcfg, ofport);
994 xport = xzalloc(sizeof *xport);
995 xport->ofport = ofport;
996 xport->xbridge = xbridge_lookup(new_xcfg, ofproto);
997 xport->ofp_port = ofp_port;
999 xlate_xport_init(new_xcfg, xport);
1002 ovs_assert(xport->ofp_port == ofp_port);
1004 xlate_xport_set(xport, odp_port, netdev, cfm, bfd, lldp,
1005 stp_port_no, rstp_port, config, state, is_tunnel,
1009 xport->peer->peer = NULL;
1011 xport->peer = xport_lookup(new_xcfg, peer);
1013 xport->peer->peer = xport;
1016 if (xport->xbundle) {
1017 list_remove(&xport->bundle_node);
1019 xport->xbundle = xbundle_lookup(new_xcfg, ofbundle);
1020 if (xport->xbundle) {
1021 list_insert(&xport->xbundle->xports, &xport->bundle_node);
1024 clear_skb_priorities(xport);
1025 for (i = 0; i < n_qdscp; i++) {
1026 struct skb_priority_to_dscp *pdscp;
1027 uint32_t skb_priority;
1029 if (dpif_queue_to_priority(xport->xbridge->dpif, qdscp_list[i].queue,
1034 pdscp = xmalloc(sizeof *pdscp);
1035 pdscp->skb_priority = skb_priority;
1036 pdscp->dscp = (qdscp_list[i].dscp << 2) & IP_DSCP_MASK;
1037 hmap_insert(&xport->skb_priorities, &pdscp->hmap_node,
1038 hash_int(pdscp->skb_priority, 0));
1043 xlate_xport_remove(struct xlate_cfg *xcfg, struct xport *xport)
1050 xport->peer->peer = NULL;
1054 if (xport->xbundle) {
1055 list_remove(&xport->bundle_node);
1058 clear_skb_priorities(xport);
1059 hmap_destroy(&xport->skb_priorities);
1061 hmap_remove(&xcfg->xports, &xport->hmap_node);
1062 hmap_remove(&xport->xbridge->xports, &xport->ofp_node);
1064 netdev_close(xport->netdev);
1065 rstp_port_unref(xport->rstp_port);
1066 cfm_unref(xport->cfm);
1067 bfd_unref(xport->bfd);
1068 lldp_unref(xport->lldp);
1073 xlate_ofport_remove(struct ofport_dpif *ofport)
1075 struct xport *xport;
1077 ovs_assert(new_xcfg);
1079 xport = xport_lookup(new_xcfg, ofport);
1080 xlate_xport_remove(new_xcfg, xport);
1083 static struct ofproto_dpif *
1084 xlate_lookup_ofproto_(const struct dpif_backer *backer, const struct flow *flow,
1085 ofp_port_t *ofp_in_port, const struct xport **xportp)
1087 struct xlate_cfg *xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
1088 const struct xport *xport;
1090 xport = xport_lookup(xcfg, tnl_port_should_receive(flow)
1091 ? tnl_port_receive(flow)
1092 : odp_port_to_ofport(backer, flow->in_port.odp_port));
1093 if (OVS_UNLIKELY(!xport)) {
1098 *ofp_in_port = xport->ofp_port;
1100 return xport->xbridge->ofproto;
1103 /* Given a datapath and flow metadata ('backer', and 'flow' respectively)
1104 * returns the corresponding struct ofproto_dpif and OpenFlow port number. */
1105 struct ofproto_dpif *
1106 xlate_lookup_ofproto(const struct dpif_backer *backer, const struct flow *flow,
1107 ofp_port_t *ofp_in_port)
1109 const struct xport *xport;
1111 return xlate_lookup_ofproto_(backer, flow, ofp_in_port, &xport);
1114 /* Given a datapath and flow metadata ('backer', and 'flow' respectively),
1115 * optionally populates 'ofproto' with the ofproto_dpif, 'ofp_in_port' with the
1116 * openflow in_port, and 'ipfix', 'sflow', and 'netflow' with the appropriate
1117 * handles for those protocols if they're enabled. Caller may use the returned
1118 * pointers until quiescing, for longer term use additional references must
1121 * Returns 0 if successful, ENODEV if the parsed flow has no associated ofproto.
1124 xlate_lookup(const struct dpif_backer *backer, const struct flow *flow,
1125 struct ofproto_dpif **ofprotop, struct dpif_ipfix **ipfix,
1126 struct dpif_sflow **sflow, struct netflow **netflow,
1127 ofp_port_t *ofp_in_port)
1129 struct ofproto_dpif *ofproto;
1130 const struct xport *xport;
1132 ofproto = xlate_lookup_ofproto_(backer, flow, ofp_in_port, &xport);
1139 *ofprotop = ofproto;
1143 *ipfix = xport ? xport->xbridge->ipfix : NULL;
1147 *sflow = xport ? xport->xbridge->sflow : NULL;
1151 *netflow = xport ? xport->xbridge->netflow : NULL;
1157 static struct xbridge *
1158 xbridge_lookup(struct xlate_cfg *xcfg, const struct ofproto_dpif *ofproto)
1160 struct hmap *xbridges;
1161 struct xbridge *xbridge;
1163 if (!ofproto || !xcfg) {
1167 xbridges = &xcfg->xbridges;
1169 HMAP_FOR_EACH_IN_BUCKET (xbridge, hmap_node, hash_pointer(ofproto, 0),
1171 if (xbridge->ofproto == ofproto) {
1178 static struct xbundle *
1179 xbundle_lookup(struct xlate_cfg *xcfg, const struct ofbundle *ofbundle)
1181 struct hmap *xbundles;
1182 struct xbundle *xbundle;
1184 if (!ofbundle || !xcfg) {
1188 xbundles = &xcfg->xbundles;
1190 HMAP_FOR_EACH_IN_BUCKET (xbundle, hmap_node, hash_pointer(ofbundle, 0),
1192 if (xbundle->ofbundle == ofbundle) {
1199 static struct xport *
1200 xport_lookup(struct xlate_cfg *xcfg, const struct ofport_dpif *ofport)
1202 struct hmap *xports;
1203 struct xport *xport;
1205 if (!ofport || !xcfg) {
1209 xports = &xcfg->xports;
1211 HMAP_FOR_EACH_IN_BUCKET (xport, hmap_node, hash_pointer(ofport, 0),
1213 if (xport->ofport == ofport) {
1220 static struct stp_port *
1221 xport_get_stp_port(const struct xport *xport)
1223 return xport->xbridge->stp && xport->stp_port_no != -1
1224 ? stp_get_port(xport->xbridge->stp, xport->stp_port_no)
1229 xport_stp_learn_state(const struct xport *xport)
1231 struct stp_port *sp = xport_get_stp_port(xport);
1233 ? stp_learn_in_state(stp_port_get_state(sp))
1238 xport_stp_forward_state(const struct xport *xport)
1240 struct stp_port *sp = xport_get_stp_port(xport);
1242 ? stp_forward_in_state(stp_port_get_state(sp))
1247 xport_stp_should_forward_bpdu(const struct xport *xport)
1249 struct stp_port *sp = xport_get_stp_port(xport);
1250 return stp_should_forward_bpdu(sp ? stp_port_get_state(sp) : STP_DISABLED);
1253 /* Returns true if STP should process 'flow'. Sets fields in 'wc' that
1254 * were used to make the determination.*/
1256 stp_should_process_flow(const struct flow *flow, struct flow_wildcards *wc)
1258 /* is_stp() also checks dl_type, but dl_type is always set in 'wc'. */
1259 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1260 return is_stp(flow);
1264 stp_process_packet(const struct xport *xport, const struct dp_packet *packet)
1266 struct stp_port *sp = xport_get_stp_port(xport);
1267 struct dp_packet payload = *packet;
1268 struct eth_header *eth = dp_packet_data(&payload);
1270 /* Sink packets on ports that have STP disabled when the bridge has
1272 if (!sp || stp_port_get_state(sp) == STP_DISABLED) {
1276 /* Trim off padding on payload. */
1277 if (dp_packet_size(&payload) > ntohs(eth->eth_type) + ETH_HEADER_LEN) {
1278 dp_packet_set_size(&payload, ntohs(eth->eth_type) + ETH_HEADER_LEN);
1281 if (dp_packet_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) {
1282 stp_received_bpdu(sp, dp_packet_data(&payload), dp_packet_size(&payload));
1286 static enum rstp_state
1287 xport_get_rstp_port_state(const struct xport *xport)
1289 return xport->rstp_port
1290 ? rstp_port_get_state(xport->rstp_port)
1295 xport_rstp_learn_state(const struct xport *xport)
1297 return xport->xbridge->rstp && xport->rstp_port
1298 ? rstp_learn_in_state(xport_get_rstp_port_state(xport))
1303 xport_rstp_forward_state(const struct xport *xport)
1305 return xport->xbridge->rstp && xport->rstp_port
1306 ? rstp_forward_in_state(xport_get_rstp_port_state(xport))
1311 xport_rstp_should_manage_bpdu(const struct xport *xport)
1313 return rstp_should_manage_bpdu(xport_get_rstp_port_state(xport));
1317 rstp_process_packet(const struct xport *xport, const struct dp_packet *packet)
1319 struct dp_packet payload = *packet;
1320 struct eth_header *eth = dp_packet_data(&payload);
1322 /* Sink packets on ports that have no RSTP. */
1323 if (!xport->rstp_port) {
1327 /* Trim off padding on payload. */
1328 if (dp_packet_size(&payload) > ntohs(eth->eth_type) + ETH_HEADER_LEN) {
1329 dp_packet_set_size(&payload, ntohs(eth->eth_type) + ETH_HEADER_LEN);
1332 if (dp_packet_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) {
1333 rstp_port_received_bpdu(xport->rstp_port, dp_packet_data(&payload),
1334 dp_packet_size(&payload));
1338 static struct xport *
1339 get_ofp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
1341 struct xport *xport;
1343 HMAP_FOR_EACH_IN_BUCKET (xport, ofp_node, hash_ofp_port(ofp_port),
1345 if (xport->ofp_port == ofp_port) {
1353 ofp_port_to_odp_port(const struct xbridge *xbridge, ofp_port_t ofp_port)
1355 const struct xport *xport = get_ofp_port(xbridge, ofp_port);
1356 return xport ? xport->odp_port : ODPP_NONE;
1360 odp_port_is_alive(const struct xlate_ctx *ctx, ofp_port_t ofp_port)
1362 struct xport *xport = get_ofp_port(ctx->xbridge, ofp_port);
1363 return xport && xport->may_enable;
1366 static struct ofputil_bucket *
1367 group_first_live_bucket(const struct xlate_ctx *, const struct group_dpif *,
1371 group_is_alive(const struct xlate_ctx *ctx, uint32_t group_id, int depth)
1373 struct group_dpif *group;
1375 if (group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group)) {
1376 struct ofputil_bucket *bucket;
1378 bucket = group_first_live_bucket(ctx, group, depth);
1379 group_dpif_unref(group);
1380 return bucket == NULL;
1386 #define MAX_LIVENESS_RECURSION 128 /* Arbitrary limit */
1389 bucket_is_alive(const struct xlate_ctx *ctx,
1390 struct ofputil_bucket *bucket, int depth)
1392 if (depth >= MAX_LIVENESS_RECURSION) {
1393 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
1395 VLOG_WARN_RL(&rl, "bucket chaining exceeded %d links",
1396 MAX_LIVENESS_RECURSION);
1400 return (!ofputil_bucket_has_liveness(bucket)
1401 || (bucket->watch_port != OFPP_ANY
1402 && odp_port_is_alive(ctx, bucket->watch_port))
1403 || (bucket->watch_group != OFPG_ANY
1404 && group_is_alive(ctx, bucket->watch_group, depth + 1)));
1407 static struct ofputil_bucket *
1408 group_first_live_bucket(const struct xlate_ctx *ctx,
1409 const struct group_dpif *group, int depth)
1411 struct ofputil_bucket *bucket;
1412 const struct ovs_list *buckets;
1414 group_dpif_get_buckets(group, &buckets);
1415 LIST_FOR_EACH (bucket, list_node, buckets) {
1416 if (bucket_is_alive(ctx, bucket, depth)) {
1424 static struct ofputil_bucket *
1425 group_best_live_bucket(const struct xlate_ctx *ctx,
1426 const struct group_dpif *group,
1429 struct ofputil_bucket *best_bucket = NULL;
1430 uint32_t best_score = 0;
1433 struct ofputil_bucket *bucket;
1434 const struct ovs_list *buckets;
1436 group_dpif_get_buckets(group, &buckets);
1437 LIST_FOR_EACH (bucket, list_node, buckets) {
1438 if (bucket_is_alive(ctx, bucket, 0)) {
1439 uint32_t score = (hash_int(i, basis) & 0xffff) * bucket->weight;
1440 if (score >= best_score) {
1441 best_bucket = bucket;
1452 xbundle_trunks_vlan(const struct xbundle *bundle, uint16_t vlan)
1454 return (bundle->vlan_mode != PORT_VLAN_ACCESS
1455 && (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan)));
1459 xbundle_includes_vlan(const struct xbundle *xbundle, uint16_t vlan)
1461 return vlan == xbundle->vlan || xbundle_trunks_vlan(xbundle, vlan);
1464 static mirror_mask_t
1465 xbundle_mirror_out(const struct xbridge *xbridge, struct xbundle *xbundle)
1467 return xbundle != &ofpp_none_bundle
1468 ? mirror_bundle_out(xbridge->mbridge, xbundle->ofbundle)
1472 static mirror_mask_t
1473 xbundle_mirror_src(const struct xbridge *xbridge, struct xbundle *xbundle)
1475 return xbundle != &ofpp_none_bundle
1476 ? mirror_bundle_src(xbridge->mbridge, xbundle->ofbundle)
1480 static mirror_mask_t
1481 xbundle_mirror_dst(const struct xbridge *xbridge, struct xbundle *xbundle)
1483 return xbundle != &ofpp_none_bundle
1484 ? mirror_bundle_dst(xbridge->mbridge, xbundle->ofbundle)
1488 static struct xbundle *
1489 lookup_input_bundle(const struct xbridge *xbridge, ofp_port_t in_port,
1490 bool warn, struct xport **in_xportp)
1492 struct xport *xport;
1494 /* Find the port and bundle for the received packet. */
1495 xport = get_ofp_port(xbridge, in_port);
1499 if (xport && xport->xbundle) {
1500 return xport->xbundle;
1503 /* Special-case OFPP_NONE (OF1.0) and OFPP_CONTROLLER (OF1.1+),
1504 * which a controller may use as the ingress port for traffic that
1505 * it is sourcing. */
1506 if (in_port == OFPP_CONTROLLER || in_port == OFPP_NONE) {
1507 return &ofpp_none_bundle;
1510 /* Odd. A few possible reasons here:
1512 * - We deleted a port but there are still a few packets queued up
1515 * - Someone externally added a port (e.g. "ovs-dpctl add-if") that
1516 * we don't know about.
1518 * - The ofproto client didn't configure the port as part of a bundle.
1519 * This is particularly likely to happen if a packet was received on the
1520 * port after it was created, but before the client had a chance to
1521 * configure its bundle.
1524 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1526 VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown "
1527 "port %"PRIu16, xbridge->name, in_port);
1533 mirror_packet(struct xlate_ctx *ctx, struct xbundle *xbundle,
1534 mirror_mask_t mirrors)
1536 bool warn = ctx->xin->packet != NULL;
1537 uint16_t vid = vlan_tci_to_vid(ctx->xin->flow.vlan_tci);
1538 if (!input_vid_is_valid(vid, xbundle, warn)) {
1541 uint16_t vlan = input_vid_to_vlan(xbundle, vid);
1543 const struct xbridge *xbridge = ctx->xbridge;
1545 /* Don't mirror to destinations that we've already mirrored to. */
1546 mirrors &= ~ctx->mirrors;
1551 /* Record these mirrors so that we don't mirror to them again. */
1552 ctx->mirrors |= mirrors;
1554 if (ctx->xin->resubmit_stats) {
1555 mirror_update_stats(xbridge->mbridge, mirrors,
1556 ctx->xin->resubmit_stats->n_packets,
1557 ctx->xin->resubmit_stats->n_bytes);
1559 if (ctx->xin->xcache) {
1560 struct xc_entry *entry;
1562 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_MIRROR);
1563 entry->u.mirror.mbridge = mbridge_ref(xbridge->mbridge);
1564 entry->u.mirror.mirrors = mirrors;
1568 const unsigned long *vlans;
1569 mirror_mask_t dup_mirrors;
1570 struct ofbundle *out;
1573 bool has_mirror = mirror_get(xbridge->mbridge, raw_ctz(mirrors),
1574 &vlans, &dup_mirrors, &out, &out_vlan);
1575 ovs_assert(has_mirror);
1578 ctx->wc->masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK);
1581 if (vlans && !bitmap_is_set(vlans, vlan)) {
1582 mirrors = zero_rightmost_1bit(mirrors);
1586 mirrors &= ~dup_mirrors;
1587 ctx->mirrors |= dup_mirrors;
1589 struct xlate_cfg *xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
1590 struct xbundle *out_xbundle = xbundle_lookup(xcfg, out);
1592 output_normal(ctx, out_xbundle, vlan);
1594 } else if (vlan != out_vlan
1595 && !eth_addr_is_reserved(ctx->xin->flow.dl_dst)) {
1596 struct xbundle *xbundle;
1598 LIST_FOR_EACH (xbundle, list_node, &xbridge->xbundles) {
1599 if (xbundle_includes_vlan(xbundle, out_vlan)
1600 && !xbundle_mirror_out(xbridge, xbundle)) {
1601 output_normal(ctx, xbundle, out_vlan);
1609 mirror_ingress_packet(struct xlate_ctx *ctx)
1611 if (mbridge_has_mirrors(ctx->xbridge->mbridge)) {
1612 bool warn = ctx->xin->packet != NULL;
1613 struct xbundle *xbundle = lookup_input_bundle(
1614 ctx->xbridge, ctx->xin->flow.in_port.ofp_port, warn, NULL);
1616 mirror_packet(ctx, xbundle,
1617 xbundle_mirror_src(ctx->xbridge, xbundle));
1622 /* Given 'vid', the VID obtained from the 802.1Q header that was received as
1623 * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle',
1624 * the bundle on which the packet was received, returns the VLAN to which the
1627 * Both 'vid' and the return value are in the range 0...4095. */
1629 input_vid_to_vlan(const struct xbundle *in_xbundle, uint16_t vid)
1631 switch (in_xbundle->vlan_mode) {
1632 case PORT_VLAN_ACCESS:
1633 return in_xbundle->vlan;
1636 case PORT_VLAN_TRUNK:
1639 case PORT_VLAN_NATIVE_UNTAGGED:
1640 case PORT_VLAN_NATIVE_TAGGED:
1641 return vid ? vid : in_xbundle->vlan;
1648 /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'.
1649 * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs
1652 * 'vid' should be the VID obtained from the 802.1Q header that was received as
1653 * part of a packet (specify 0 if there was no 802.1Q header), in the range
1656 input_vid_is_valid(uint16_t vid, struct xbundle *in_xbundle, bool warn)
1658 /* Allow any VID on the OFPP_NONE port. */
1659 if (in_xbundle == &ofpp_none_bundle) {
1663 switch (in_xbundle->vlan_mode) {
1664 case PORT_VLAN_ACCESS:
1667 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1668 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" tagged "
1669 "packet received on port %s configured as VLAN "
1670 "%"PRIu16" access port", vid, in_xbundle->name,
1677 case PORT_VLAN_NATIVE_UNTAGGED:
1678 case PORT_VLAN_NATIVE_TAGGED:
1680 /* Port must always carry its native VLAN. */
1684 case PORT_VLAN_TRUNK:
1685 if (!xbundle_includes_vlan(in_xbundle, vid)) {
1687 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1688 VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" packet "
1689 "received on port %s not configured for trunking "
1690 "VLAN %"PRIu16, vid, in_xbundle->name, vid);
1702 /* Given 'vlan', the VLAN that a packet belongs to, and
1703 * 'out_xbundle', a bundle on which the packet is to be output, returns the VID
1704 * that should be included in the 802.1Q header. (If the return value is 0,
1705 * then the 802.1Q header should only be included in the packet if there is a
1708 * Both 'vlan' and the return value are in the range 0...4095. */
1710 output_vlan_to_vid(const struct xbundle *out_xbundle, uint16_t vlan)
1712 switch (out_xbundle->vlan_mode) {
1713 case PORT_VLAN_ACCESS:
1716 case PORT_VLAN_TRUNK:
1717 case PORT_VLAN_NATIVE_TAGGED:
1720 case PORT_VLAN_NATIVE_UNTAGGED:
1721 return vlan == out_xbundle->vlan ? 0 : vlan;
1729 output_normal(struct xlate_ctx *ctx, const struct xbundle *out_xbundle,
1732 ovs_be16 *flow_tci = &ctx->xin->flow.vlan_tci;
1734 ovs_be16 tci, old_tci;
1735 struct xport *xport;
1736 struct xlate_bond_recirc xr;
1737 bool use_recirc = false;
1739 vid = output_vlan_to_vid(out_xbundle, vlan);
1740 if (list_is_empty(&out_xbundle->xports)) {
1741 /* Partially configured bundle with no slaves. Drop the packet. */
1743 } else if (!out_xbundle->bond) {
1744 xport = CONTAINER_OF(list_front(&out_xbundle->xports), struct xport,
1747 struct xlate_cfg *xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
1748 struct flow_wildcards *wc = ctx->wc;
1749 struct ofport_dpif *ofport;
1751 if (ctx->xbridge->support.odp.recirc) {
1752 use_recirc = bond_may_recirc(
1753 out_xbundle->bond, &xr.recirc_id, &xr.hash_basis);
1756 /* Only TCP mode uses recirculation. */
1757 xr.hash_alg = OVS_HASH_ALG_L4;
1758 bond_update_post_recirc_rules(out_xbundle->bond, false);
1760 /* Recirculation does not require unmasking hash fields. */
1765 ofport = bond_choose_output_slave(out_xbundle->bond,
1766 &ctx->xin->flow, wc, vid);
1767 xport = xport_lookup(xcfg, ofport);
1770 /* No slaves enabled, so drop packet. */
1774 /* If use_recirc is set, the main thread will handle stats
1775 * accounting for this bond. */
1777 if (ctx->xin->resubmit_stats) {
1778 bond_account(out_xbundle->bond, &ctx->xin->flow, vid,
1779 ctx->xin->resubmit_stats->n_bytes);
1781 if (ctx->xin->xcache) {
1782 struct xc_entry *entry;
1785 flow = &ctx->xin->flow;
1786 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_BOND);
1787 entry->u.bond.bond = bond_ref(out_xbundle->bond);
1788 entry->u.bond.flow = xmemdup(flow, sizeof *flow);
1789 entry->u.bond.vid = vid;
1794 old_tci = *flow_tci;
1796 if (tci || out_xbundle->use_priority_tags) {
1797 tci |= *flow_tci & htons(VLAN_PCP_MASK);
1799 tci |= htons(VLAN_CFI);
1804 compose_output_action(ctx, xport->ofp_port, use_recirc ? &xr : NULL);
1805 *flow_tci = old_tci;
1808 /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after
1809 * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to
1810 * indicate this; newer upstream kernels use gratuitous ARP requests. */
1812 is_gratuitous_arp(const struct flow *flow, struct flow_wildcards *wc)
1814 if (flow->dl_type != htons(ETH_TYPE_ARP)) {
1818 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
1819 if (!eth_addr_is_broadcast(flow->dl_dst)) {
1823 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
1824 if (flow->nw_proto == ARP_OP_REPLY) {
1826 } else if (flow->nw_proto == ARP_OP_REQUEST) {
1827 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
1828 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
1830 return flow->nw_src == flow->nw_dst;
1836 /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or
1837 * dropped. Returns true if they may be forwarded, false if they should be
1840 * 'in_port' must be the xport that corresponds to flow->in_port.
1841 * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull).
1843 * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as
1844 * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as
1845 * checked by input_vid_is_valid().
1847 * May also add tags to '*tags', although the current implementation only does
1848 * so in one special case.
1851 is_admissible(struct xlate_ctx *ctx, struct xport *in_port,
1854 struct xbundle *in_xbundle = in_port->xbundle;
1855 const struct xbridge *xbridge = ctx->xbridge;
1856 struct flow *flow = &ctx->xin->flow;
1858 /* Drop frames for reserved multicast addresses
1859 * only if forward_bpdu option is absent. */
1860 if (!xbridge->forward_bpdu && eth_addr_is_reserved(flow->dl_dst)) {
1861 xlate_report(ctx, "packet has reserved destination MAC, dropping");
1865 if (in_xbundle->bond) {
1866 struct mac_entry *mac;
1868 switch (bond_check_admissibility(in_xbundle->bond, in_port->ofport,
1874 xlate_report(ctx, "bonding refused admissibility, dropping");
1877 case BV_DROP_IF_MOVED:
1878 ovs_rwlock_rdlock(&xbridge->ml->rwlock);
1879 mac = mac_learning_lookup(xbridge->ml, flow->dl_src, vlan);
1881 && mac_entry_get_port(xbridge->ml, mac) != in_xbundle->ofbundle
1882 && (!is_gratuitous_arp(flow, ctx->wc)
1883 || mac_entry_is_grat_arp_locked(mac))) {
1884 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1885 xlate_report(ctx, "SLB bond thinks this packet looped back, "
1889 ovs_rwlock_unlock(&xbridge->ml->rwlock);
1897 /* Checks whether a MAC learning update is necessary for MAC learning table
1898 * 'ml' given that a packet matching 'flow' was received on 'in_xbundle' in
1901 * Most packets processed through the MAC learning table do not actually
1902 * change it in any way. This function requires only a read lock on the MAC
1903 * learning table, so it is much cheaper in this common case.
1905 * Keep the code here synchronized with that in update_learning_table__()
1908 is_mac_learning_update_needed(const struct mac_learning *ml,
1909 const struct flow *flow,
1910 struct flow_wildcards *wc,
1911 int vlan, struct xbundle *in_xbundle)
1912 OVS_REQ_RDLOCK(ml->rwlock)
1914 struct mac_entry *mac;
1916 if (!mac_learning_may_learn(ml, flow->dl_src, vlan)) {
1920 mac = mac_learning_lookup(ml, flow->dl_src, vlan);
1921 if (!mac || mac_entry_age(ml, mac)) {
1925 if (is_gratuitous_arp(flow, wc)) {
1926 /* We don't want to learn from gratuitous ARP packets that are
1927 * reflected back over bond slaves so we lock the learning table. */
1928 if (!in_xbundle->bond) {
1930 } else if (mac_entry_is_grat_arp_locked(mac)) {
1935 return mac_entry_get_port(ml, mac) != in_xbundle->ofbundle;
1939 /* Updates MAC learning table 'ml' given that a packet matching 'flow' was
1940 * received on 'in_xbundle' in 'vlan'.
1942 * This code repeats all the checks in is_mac_learning_update_needed() because
1943 * the lock was released between there and here and thus the MAC learning state
1944 * could have changed.
1946 * Keep the code here synchronized with that in is_mac_learning_update_needed()
1949 update_learning_table__(const struct xbridge *xbridge,
1950 const struct flow *flow, struct flow_wildcards *wc,
1951 int vlan, struct xbundle *in_xbundle)
1952 OVS_REQ_WRLOCK(xbridge->ml->rwlock)
1954 struct mac_entry *mac;
1956 if (!mac_learning_may_learn(xbridge->ml, flow->dl_src, vlan)) {
1960 mac = mac_learning_insert(xbridge->ml, flow->dl_src, vlan);
1961 if (is_gratuitous_arp(flow, wc)) {
1962 /* We don't want to learn from gratuitous ARP packets that are
1963 * reflected back over bond slaves so we lock the learning table. */
1964 if (!in_xbundle->bond) {
1965 mac_entry_set_grat_arp_lock(mac);
1966 } else if (mac_entry_is_grat_arp_locked(mac)) {
1971 if (mac_entry_get_port(xbridge->ml, mac) != in_xbundle->ofbundle) {
1972 /* The log messages here could actually be useful in debugging,
1973 * so keep the rate limit relatively high. */
1974 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
1976 VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
1977 "on port %s in VLAN %d",
1978 xbridge->name, ETH_ADDR_ARGS(flow->dl_src),
1979 in_xbundle->name, vlan);
1981 mac_entry_set_port(xbridge->ml, mac, in_xbundle->ofbundle);
1986 update_learning_table(const struct xbridge *xbridge,
1987 const struct flow *flow, struct flow_wildcards *wc,
1988 int vlan, struct xbundle *in_xbundle)
1992 /* Don't learn the OFPP_NONE port. */
1993 if (in_xbundle == &ofpp_none_bundle) {
1997 /* First try the common case: no change to MAC learning table. */
1998 ovs_rwlock_rdlock(&xbridge->ml->rwlock);
1999 need_update = is_mac_learning_update_needed(xbridge->ml, flow, wc, vlan,
2001 ovs_rwlock_unlock(&xbridge->ml->rwlock);
2004 /* Slow path: MAC learning table might need an update. */
2005 ovs_rwlock_wrlock(&xbridge->ml->rwlock);
2006 update_learning_table__(xbridge, flow, wc, vlan, in_xbundle);
2007 ovs_rwlock_unlock(&xbridge->ml->rwlock);
2011 /* Updates multicast snooping table 'ms' given that a packet matching 'flow'
2012 * was received on 'in_xbundle' in 'vlan' and is either Report or Query. */
2014 update_mcast_snooping_table4__(const struct xbridge *xbridge,
2015 const struct flow *flow,
2016 struct mcast_snooping *ms, int vlan,
2017 struct xbundle *in_xbundle,
2018 const struct dp_packet *packet)
2019 OVS_REQ_WRLOCK(ms->rwlock)
2021 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(60, 30);
2023 ovs_be32 ip4 = flow->igmp_group_ip4;
2025 switch (ntohs(flow->tp_src)) {
2026 case IGMP_HOST_MEMBERSHIP_REPORT:
2027 case IGMPV2_HOST_MEMBERSHIP_REPORT:
2028 if (mcast_snooping_add_group4(ms, ip4, vlan, in_xbundle->ofbundle)) {
2029 VLOG_DBG_RL(&rl, "bridge %s: multicast snooping learned that "
2030 IP_FMT" is on port %s in VLAN %d",
2031 xbridge->name, IP_ARGS(ip4), in_xbundle->name, vlan);
2034 case IGMP_HOST_LEAVE_MESSAGE:
2035 if (mcast_snooping_leave_group4(ms, ip4, vlan, in_xbundle->ofbundle)) {
2036 VLOG_DBG_RL(&rl, "bridge %s: multicast snooping leaving "
2037 IP_FMT" is on port %s in VLAN %d",
2038 xbridge->name, IP_ARGS(ip4), in_xbundle->name, vlan);
2041 case IGMP_HOST_MEMBERSHIP_QUERY:
2042 if (flow->nw_src && mcast_snooping_add_mrouter(ms, vlan,
2043 in_xbundle->ofbundle)) {
2044 VLOG_DBG_RL(&rl, "bridge %s: multicast snooping query from "
2045 IP_FMT" is on port %s in VLAN %d",
2046 xbridge->name, IP_ARGS(flow->nw_src),
2047 in_xbundle->name, vlan);
2050 case IGMPV3_HOST_MEMBERSHIP_REPORT:
2051 if ((count = mcast_snooping_add_report(ms, packet, vlan,
2052 in_xbundle->ofbundle))) {
2053 VLOG_DBG_RL(&rl, "bridge %s: multicast snooping processed %d "
2054 "addresses on port %s in VLAN %d",
2055 xbridge->name, count, in_xbundle->name, vlan);
2062 update_mcast_snooping_table6__(const struct xbridge *xbridge,
2063 const struct flow *flow,
2064 struct mcast_snooping *ms, int vlan,
2065 struct xbundle *in_xbundle,
2066 const struct dp_packet *packet)
2067 OVS_REQ_WRLOCK(ms->rwlock)
2069 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(60, 30);
2072 switch (ntohs(flow->tp_src)) {
2074 if (!ipv6_addr_equals(&flow->ipv6_src, &in6addr_any)
2075 && mcast_snooping_add_mrouter(ms, vlan, in_xbundle->ofbundle)) {
2076 VLOG_DBG_RL(&rl, "bridge %s: multicast snooping query on port %s"
2078 xbridge->name, in_xbundle->name, vlan);
2084 count = mcast_snooping_add_mld(ms, packet, vlan, in_xbundle->ofbundle);
2086 VLOG_DBG_RL(&rl, "bridge %s: multicast snooping processed %d "
2087 "addresses on port %s in VLAN %d",
2088 xbridge->name, count, in_xbundle->name, vlan);
2094 /* Updates multicast snooping table 'ms' given that a packet matching 'flow'
2095 * was received on 'in_xbundle' in 'vlan'. */
2097 update_mcast_snooping_table(const struct xbridge *xbridge,
2098 const struct flow *flow, int vlan,
2099 struct xbundle *in_xbundle,
2100 const struct dp_packet *packet)
2102 struct mcast_snooping *ms = xbridge->ms;
2103 struct xlate_cfg *xcfg;
2104 struct xbundle *mcast_xbundle;
2105 struct mcast_port_bundle *fport;
2107 /* Don't learn the OFPP_NONE port. */
2108 if (in_xbundle == &ofpp_none_bundle) {
2112 /* Don't learn from flood ports */
2113 mcast_xbundle = NULL;
2114 ovs_rwlock_wrlock(&ms->rwlock);
2115 xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
2116 LIST_FOR_EACH(fport, node, &ms->fport_list) {
2117 mcast_xbundle = xbundle_lookup(xcfg, fport->port);
2118 if (mcast_xbundle == in_xbundle) {
2123 if (!mcast_xbundle || mcast_xbundle != in_xbundle) {
2124 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2125 update_mcast_snooping_table4__(xbridge, flow, ms, vlan,
2126 in_xbundle, packet);
2128 update_mcast_snooping_table6__(xbridge, flow, ms, vlan,
2129 in_xbundle, packet);
2132 ovs_rwlock_unlock(&ms->rwlock);
2135 /* send the packet to ports having the multicast group learned */
2137 xlate_normal_mcast_send_group(struct xlate_ctx *ctx,
2138 struct mcast_snooping *ms OVS_UNUSED,
2139 struct mcast_group *grp,
2140 struct xbundle *in_xbundle, uint16_t vlan)
2141 OVS_REQ_RDLOCK(ms->rwlock)
2143 struct xlate_cfg *xcfg;
2144 struct mcast_group_bundle *b;
2145 struct xbundle *mcast_xbundle;
2147 xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
2148 LIST_FOR_EACH(b, bundle_node, &grp->bundle_lru) {
2149 mcast_xbundle = xbundle_lookup(xcfg, b->port);
2150 if (mcast_xbundle && mcast_xbundle != in_xbundle) {
2151 xlate_report(ctx, "forwarding to mcast group port");
2152 output_normal(ctx, mcast_xbundle, vlan);
2153 } else if (!mcast_xbundle) {
2154 xlate_report(ctx, "mcast group port is unknown, dropping");
2156 xlate_report(ctx, "mcast group port is input port, dropping");
2161 /* send the packet to ports connected to multicast routers */
2163 xlate_normal_mcast_send_mrouters(struct xlate_ctx *ctx,
2164 struct mcast_snooping *ms,
2165 struct xbundle *in_xbundle, uint16_t vlan)
2166 OVS_REQ_RDLOCK(ms->rwlock)
2168 struct xlate_cfg *xcfg;
2169 struct mcast_mrouter_bundle *mrouter;
2170 struct xbundle *mcast_xbundle;
2172 xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
2173 LIST_FOR_EACH(mrouter, mrouter_node, &ms->mrouter_lru) {
2174 mcast_xbundle = xbundle_lookup(xcfg, mrouter->port);
2175 if (mcast_xbundle && mcast_xbundle != in_xbundle) {
2176 xlate_report(ctx, "forwarding to mcast router port");
2177 output_normal(ctx, mcast_xbundle, vlan);
2178 } else if (!mcast_xbundle) {
2179 xlate_report(ctx, "mcast router port is unknown, dropping");
2181 xlate_report(ctx, "mcast router port is input port, dropping");
2186 /* send the packet to ports flagged to be flooded */
2188 xlate_normal_mcast_send_fports(struct xlate_ctx *ctx,
2189 struct mcast_snooping *ms,
2190 struct xbundle *in_xbundle, uint16_t vlan)
2191 OVS_REQ_RDLOCK(ms->rwlock)
2193 struct xlate_cfg *xcfg;
2194 struct mcast_port_bundle *fport;
2195 struct xbundle *mcast_xbundle;
2197 xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
2198 LIST_FOR_EACH(fport, node, &ms->fport_list) {
2199 mcast_xbundle = xbundle_lookup(xcfg, fport->port);
2200 if (mcast_xbundle && mcast_xbundle != in_xbundle) {
2201 xlate_report(ctx, "forwarding to mcast flood port");
2202 output_normal(ctx, mcast_xbundle, vlan);
2203 } else if (!mcast_xbundle) {
2204 xlate_report(ctx, "mcast flood port is unknown, dropping");
2206 xlate_report(ctx, "mcast flood port is input port, dropping");
2211 /* forward the Reports to configured ports */
2213 xlate_normal_mcast_send_rports(struct xlate_ctx *ctx,
2214 struct mcast_snooping *ms,
2215 struct xbundle *in_xbundle, uint16_t vlan)
2216 OVS_REQ_RDLOCK(ms->rwlock)
2218 struct xlate_cfg *xcfg;
2219 struct mcast_port_bundle *rport;
2220 struct xbundle *mcast_xbundle;
2222 xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
2223 LIST_FOR_EACH(rport, node, &ms->rport_list) {
2224 mcast_xbundle = xbundle_lookup(xcfg, rport->port);
2225 if (mcast_xbundle && mcast_xbundle != in_xbundle) {
2226 xlate_report(ctx, "forwarding Report to mcast flagged port");
2227 output_normal(ctx, mcast_xbundle, vlan);
2228 } else if (!mcast_xbundle) {
2229 xlate_report(ctx, "mcast port is unknown, dropping the Report");
2231 xlate_report(ctx, "mcast port is input port, dropping the Report");
2237 xlate_normal_flood(struct xlate_ctx *ctx, struct xbundle *in_xbundle,
2240 struct xbundle *xbundle;
2242 LIST_FOR_EACH (xbundle, list_node, &ctx->xbridge->xbundles) {
2243 if (xbundle != in_xbundle
2244 && xbundle_includes_vlan(xbundle, vlan)
2245 && xbundle->floodable
2246 && !xbundle_mirror_out(ctx->xbridge, xbundle)) {
2247 output_normal(ctx, xbundle, vlan);
2250 ctx->nf_output_iface = NF_OUT_FLOOD;
2254 xlate_normal(struct xlate_ctx *ctx)
2256 struct flow_wildcards *wc = ctx->wc;
2257 struct flow *flow = &ctx->xin->flow;
2258 struct xbundle *in_xbundle;
2259 struct xport *in_port;
2260 struct mac_entry *mac;
2265 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
2266 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
2267 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
2269 in_xbundle = lookup_input_bundle(ctx->xbridge, flow->in_port.ofp_port,
2270 ctx->xin->packet != NULL, &in_port);
2272 xlate_report(ctx, "no input bundle, dropping");
2276 /* Drop malformed frames. */
2277 if (flow->dl_type == htons(ETH_TYPE_VLAN) &&
2278 !(flow->vlan_tci & htons(VLAN_CFI))) {
2279 if (ctx->xin->packet != NULL) {
2280 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2281 VLOG_WARN_RL(&rl, "bridge %s: dropping packet with partial "
2282 "VLAN tag received on port %s",
2283 ctx->xbridge->name, in_xbundle->name);
2285 xlate_report(ctx, "partial VLAN tag, dropping");
2289 /* Drop frames on bundles reserved for mirroring. */
2290 if (xbundle_mirror_out(ctx->xbridge, in_xbundle)) {
2291 if (ctx->xin->packet != NULL) {
2292 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2293 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
2294 "%s, which is reserved exclusively for mirroring",
2295 ctx->xbridge->name, in_xbundle->name);
2297 xlate_report(ctx, "input port is mirror output port, dropping");
2302 vid = vlan_tci_to_vid(flow->vlan_tci);
2303 if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) {
2304 xlate_report(ctx, "disallowed VLAN VID for this input port, dropping");
2307 vlan = input_vid_to_vlan(in_xbundle, vid);
2309 /* Check other admissibility requirements. */
2310 if (in_port && !is_admissible(ctx, in_port, vlan)) {
2314 /* Learn source MAC. */
2315 if (ctx->xin->may_learn) {
2316 update_learning_table(ctx->xbridge, flow, wc, vlan, in_xbundle);
2318 if (ctx->xin->xcache) {
2319 struct xc_entry *entry;
2321 /* Save enough info to update mac learning table later. */
2322 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NORMAL);
2323 entry->u.normal.ofproto = ctx->xbridge->ofproto;
2324 entry->u.normal.flow = xmemdup(flow, sizeof *flow);
2325 entry->u.normal.vlan = vlan;
2328 /* Determine output bundle. */
2329 if (mcast_snooping_enabled(ctx->xbridge->ms)
2330 && !eth_addr_is_broadcast(flow->dl_dst)
2331 && eth_addr_is_multicast(flow->dl_dst)
2332 && is_ip_any(flow)) {
2333 struct mcast_snooping *ms = ctx->xbridge->ms;
2334 struct mcast_group *grp = NULL;
2336 if (is_igmp(flow)) {
2337 if (mcast_snooping_is_membership(flow->tp_src) ||
2338 mcast_snooping_is_query(flow->tp_src)) {
2339 if (ctx->xin->may_learn) {
2340 update_mcast_snooping_table(ctx->xbridge, flow, vlan,
2341 in_xbundle, ctx->xin->packet);
2344 * IGMP packets need to take the slow path, in order to be
2345 * processed for mdb updates. That will prevent expires
2346 * firing off even after hosts have sent reports.
2348 ctx->xout->slow |= SLOW_ACTION;
2351 if (mcast_snooping_is_membership(flow->tp_src)) {
2352 ovs_rwlock_rdlock(&ms->rwlock);
2353 xlate_normal_mcast_send_mrouters(ctx, ms, in_xbundle, vlan);
2354 /* RFC4541: section 2.1.1, item 1: A snooping switch should
2355 * forward IGMP Membership Reports only to those ports where
2356 * multicast routers are attached. Alternatively stated: a
2357 * snooping switch should not forward IGMP Membership Reports
2358 * to ports on which only hosts are attached.
2359 * An administrative control may be provided to override this
2360 * restriction, allowing the report messages to be flooded to
2362 xlate_normal_mcast_send_rports(ctx, ms, in_xbundle, vlan);
2363 ovs_rwlock_unlock(&ms->rwlock);
2365 xlate_report(ctx, "multicast traffic, flooding");
2366 xlate_normal_flood(ctx, in_xbundle, vlan);
2369 } else if (is_mld(flow)) {
2370 ctx->xout->slow |= SLOW_ACTION;
2371 if (ctx->xin->may_learn) {
2372 update_mcast_snooping_table(ctx->xbridge, flow, vlan,
2373 in_xbundle, ctx->xin->packet);
2375 if (is_mld_report(flow)) {
2376 ovs_rwlock_rdlock(&ms->rwlock);
2377 xlate_normal_mcast_send_mrouters(ctx, ms, in_xbundle, vlan);
2378 xlate_normal_mcast_send_rports(ctx, ms, in_xbundle, vlan);
2379 ovs_rwlock_unlock(&ms->rwlock);
2381 xlate_report(ctx, "MLD query, flooding");
2382 xlate_normal_flood(ctx, in_xbundle, vlan);
2385 if ((flow->dl_type == htons(ETH_TYPE_IP)
2386 && ip_is_local_multicast(flow->nw_dst))
2387 || (flow->dl_type == htons(ETH_TYPE_IPV6)
2388 && ipv6_is_all_hosts(&flow->ipv6_dst))) {
2389 /* RFC4541: section 2.1.2, item 2: Packets with a dst IP
2390 * address in the 224.0.0.x range which are not IGMP must
2391 * be forwarded on all ports */
2392 xlate_report(ctx, "RFC4541: section 2.1.2, item 2, flooding");
2393 xlate_normal_flood(ctx, in_xbundle, vlan);
2398 /* forwarding to group base ports */
2399 ovs_rwlock_rdlock(&ms->rwlock);
2400 if (flow->dl_type == htons(ETH_TYPE_IP)) {
2401 grp = mcast_snooping_lookup4(ms, flow->nw_dst, vlan);
2402 } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
2403 grp = mcast_snooping_lookup(ms, &flow->ipv6_dst, vlan);
2406 xlate_normal_mcast_send_group(ctx, ms, grp, in_xbundle, vlan);
2407 xlate_normal_mcast_send_fports(ctx, ms, in_xbundle, vlan);
2408 xlate_normal_mcast_send_mrouters(ctx, ms, in_xbundle, vlan);
2410 if (mcast_snooping_flood_unreg(ms)) {
2411 xlate_report(ctx, "unregistered multicast, flooding");
2412 xlate_normal_flood(ctx, in_xbundle, vlan);
2414 xlate_normal_mcast_send_mrouters(ctx, ms, in_xbundle, vlan);
2415 xlate_normal_mcast_send_fports(ctx, ms, in_xbundle, vlan);
2418 ovs_rwlock_unlock(&ms->rwlock);
2420 ovs_rwlock_rdlock(&ctx->xbridge->ml->rwlock);
2421 mac = mac_learning_lookup(ctx->xbridge->ml, flow->dl_dst, vlan);
2422 mac_port = mac ? mac_entry_get_port(ctx->xbridge->ml, mac) : NULL;
2423 ovs_rwlock_unlock(&ctx->xbridge->ml->rwlock);
2426 struct xlate_cfg *xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
2427 struct xbundle *mac_xbundle = xbundle_lookup(xcfg, mac_port);
2428 if (mac_xbundle && mac_xbundle != in_xbundle) {
2429 xlate_report(ctx, "forwarding to learned port");
2430 output_normal(ctx, mac_xbundle, vlan);
2431 } else if (!mac_xbundle) {
2432 xlate_report(ctx, "learned port is unknown, dropping");
2434 xlate_report(ctx, "learned port is input port, dropping");
2437 xlate_report(ctx, "no learned MAC for destination, flooding");
2438 xlate_normal_flood(ctx, in_xbundle, vlan);
2443 /* Appends a "sample" action for sFlow or IPFIX to 'ctx->odp_actions'. The
2444 * 'probability' is the number of packets out of UINT32_MAX to sample. The
2445 * 'cookie' (of length 'cookie_size' bytes) is passed back in the callback for
2446 * each sampled packet. 'tunnel_out_port', if not ODPP_NONE, is added as the
2447 * OVS_USERSPACE_ATTR_EGRESS_TUN_PORT attribute. If 'include_actions', an
2448 * OVS_USERSPACE_ATTR_ACTIONS attribute is added.
2451 compose_sample_action(struct xlate_ctx *ctx,
2452 const uint32_t probability,
2453 const union user_action_cookie *cookie,
2454 const size_t cookie_size,
2455 const odp_port_t tunnel_out_port,
2456 bool include_actions)
2458 size_t sample_offset = nl_msg_start_nested(ctx->odp_actions,
2459 OVS_ACTION_ATTR_SAMPLE);
2461 nl_msg_put_u32(ctx->odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability);
2463 size_t actions_offset = nl_msg_start_nested(ctx->odp_actions,
2464 OVS_SAMPLE_ATTR_ACTIONS);
2466 odp_port_t odp_port = ofp_port_to_odp_port(
2467 ctx->xbridge, ctx->xin->flow.in_port.ofp_port);
2468 uint32_t pid = dpif_port_get_pid(ctx->xbridge->dpif, odp_port,
2469 flow_hash_5tuple(&ctx->xin->flow, 0));
2470 int cookie_offset = odp_put_userspace_action(pid, cookie, cookie_size,
2475 nl_msg_end_nested(ctx->odp_actions, actions_offset);
2476 nl_msg_end_nested(ctx->odp_actions, sample_offset);
2478 return cookie_offset;
2481 /* If sFLow is not enabled, returns 0 without doing anything.
2483 * If sFlow is enabled, appends a template "sample" action to the ODP actions
2484 * in 'ctx'. This action is a template because some of the information needed
2485 * to fill it out is not available until flow translation is complete. In this
2486 * case, this functions returns an offset, which is always nonzero, to pass
2487 * later to fix_sflow_action() to fill in the rest of the template. */
2489 compose_sflow_action(struct xlate_ctx *ctx)
2491 struct dpif_sflow *sflow = ctx->xbridge->sflow;
2492 if (!sflow || ctx->xin->flow.in_port.ofp_port == OFPP_NONE) {
2496 union user_action_cookie cookie = { .type = USER_ACTION_COOKIE_SFLOW };
2497 return compose_sample_action(ctx, dpif_sflow_get_probability(sflow),
2498 &cookie, sizeof cookie.sflow, ODPP_NONE,
2502 /* If IPFIX is enabled, this appends a "sample" action to implement IPFIX to
2503 * 'ctx->odp_actions'. */
2505 compose_ipfix_action(struct xlate_ctx *ctx, odp_port_t output_odp_port)
2507 struct dpif_ipfix *ipfix = ctx->xbridge->ipfix;
2508 odp_port_t tunnel_out_port = ODPP_NONE;
2510 if (!ipfix || ctx->xin->flow.in_port.ofp_port == OFPP_NONE) {
2514 /* For input case, output_odp_port is ODPP_NONE, which is an invalid port
2516 if (output_odp_port == ODPP_NONE &&
2517 !dpif_ipfix_get_bridge_exporter_input_sampling(ipfix)) {
2521 /* For output case, output_odp_port is valid*/
2522 if (output_odp_port != ODPP_NONE) {
2523 if (!dpif_ipfix_get_bridge_exporter_output_sampling(ipfix)) {
2526 /* If tunnel sampling is enabled, put an additional option attribute:
2527 * OVS_USERSPACE_ATTR_TUNNEL_OUT_PORT
2529 if (dpif_ipfix_get_bridge_exporter_tunnel_sampling(ipfix) &&
2530 dpif_ipfix_get_tunnel_port(ipfix, output_odp_port) ) {
2531 tunnel_out_port = output_odp_port;
2535 union user_action_cookie cookie = {
2537 .type = USER_ACTION_COOKIE_IPFIX,
2538 .output_odp_port = output_odp_port,
2541 compose_sample_action(ctx,
2542 dpif_ipfix_get_bridge_exporter_probability(ipfix),
2543 &cookie, sizeof cookie.ipfix, tunnel_out_port,
2547 /* Fix "sample" action according to data collected while composing ODP actions,
2548 * as described in compose_sflow_action().
2550 * 'user_cookie_offset' must be the offset returned by add_sflow_action(). */
2552 fix_sflow_action(struct xlate_ctx *ctx, unsigned int user_cookie_offset)
2554 const struct flow *base = &ctx->base_flow;
2555 union user_action_cookie *cookie;
2557 cookie = ofpbuf_at(ctx->odp_actions, user_cookie_offset,
2558 sizeof cookie->sflow);
2559 ovs_assert(cookie->type == USER_ACTION_COOKIE_SFLOW);
2561 cookie->type = USER_ACTION_COOKIE_SFLOW;
2562 cookie->sflow.vlan_tci = base->vlan_tci;
2564 /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output
2565 * port information") for the interpretation of cookie->output. */
2566 switch (ctx->sflow_n_outputs) {
2568 /* 0x40000000 | 256 means "packet dropped for unknown reason". */
2569 cookie->sflow.output = 0x40000000 | 256;
2573 cookie->sflow.output = dpif_sflow_odp_port_to_ifindex(
2574 ctx->xbridge->sflow, ctx->sflow_odp_port);
2575 if (cookie->sflow.output) {
2580 /* 0x80000000 means "multiple output ports. */
2581 cookie->sflow.output = 0x80000000 | ctx->sflow_n_outputs;
2587 process_special(struct xlate_ctx *ctx, const struct xport *xport)
2589 const struct flow *flow = &ctx->xin->flow;
2590 struct flow_wildcards *wc = ctx->wc;
2591 const struct xbridge *xbridge = ctx->xbridge;
2592 const struct dp_packet *packet = ctx->xin->packet;
2593 enum slow_path_reason slow;
2597 } else if (xport->cfm && cfm_should_process_flow(xport->cfm, flow, wc)) {
2599 cfm_process_heartbeat(xport->cfm, packet);
2602 } else if (xport->bfd && bfd_should_process_flow(xport->bfd, flow, wc)) {
2604 bfd_process_packet(xport->bfd, flow, packet);
2605 /* If POLL received, immediately sends FINAL back. */
2606 if (bfd_should_send_packet(xport->bfd)) {
2607 ofproto_dpif_monitor_port_send_soon(xport->ofport);
2611 } else if (xport->xbundle && xport->xbundle->lacp
2612 && flow->dl_type == htons(ETH_TYPE_LACP)) {
2614 lacp_process_packet(xport->xbundle->lacp, xport->ofport, packet);
2617 } else if ((xbridge->stp || xbridge->rstp) &&
2618 stp_should_process_flow(flow, wc)) {
2621 ? stp_process_packet(xport, packet)
2622 : rstp_process_packet(xport, packet);
2625 } else if (xport->lldp && lldp_should_process_flow(xport->lldp, flow)) {
2627 lldp_process_packet(xport->lldp, packet);
2635 ctx->xout->slow |= slow;
2643 tnl_route_lookup_flow(const struct flow *oflow,
2644 ovs_be32 *ip, struct xport **out_port)
2646 char out_dev[IFNAMSIZ];
2647 struct xbridge *xbridge;
2648 struct xlate_cfg *xcfg;
2651 if (!ovs_router_lookup(oflow->tunnel.ip_dst, out_dev, &gw)) {
2658 *ip = oflow->tunnel.ip_dst;
2661 xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
2664 HMAP_FOR_EACH (xbridge, hmap_node, &xcfg->xbridges) {
2665 if (!strncmp(xbridge->name, out_dev, IFNAMSIZ)) {
2668 HMAP_FOR_EACH (port, ofp_node, &xbridge->xports) {
2669 if (!strncmp(netdev_get_name(port->netdev), out_dev, IFNAMSIZ)) {
2680 xlate_flood_packet(struct xbridge *xbridge, struct dp_packet *packet)
2682 struct ofpact_output output;
2685 ofpact_init(&output.ofpact, OFPACT_OUTPUT, sizeof output);
2686 /* Use OFPP_NONE as the in_port to avoid special packet processing. */
2687 flow_extract(packet, &flow);
2688 flow.in_port.ofp_port = OFPP_NONE;
2689 output.port = OFPP_FLOOD;
2692 return ofproto_dpif_execute_actions(xbridge->ofproto, &flow, NULL,
2693 &output.ofpact, sizeof output,
2698 tnl_send_arp_request(const struct xport *out_dev, const uint8_t eth_src[ETH_ADDR_LEN],
2699 ovs_be32 ip_src, ovs_be32 ip_dst)
2701 struct xbridge *xbridge = out_dev->xbridge;
2702 struct dp_packet packet;
2704 dp_packet_init(&packet, 0);
2705 compose_arp(&packet, ARP_OP_REQUEST,
2706 eth_src, eth_addr_zero, true, ip_src, ip_dst);
2708 xlate_flood_packet(xbridge, &packet);
2709 dp_packet_uninit(&packet);
2713 build_tunnel_send(struct xlate_ctx *ctx, const struct xport *xport,
2714 const struct flow *flow, odp_port_t tunnel_odp_port)
2716 struct ovs_action_push_tnl tnl_push_data;
2717 struct xport *out_dev = NULL;
2718 ovs_be32 s_ip, d_ip = 0;
2719 uint8_t smac[ETH_ADDR_LEN];
2720 uint8_t dmac[ETH_ADDR_LEN];
2723 err = tnl_route_lookup_flow(flow, &d_ip, &out_dev);
2725 xlate_report(ctx, "native tunnel routing failed");
2728 xlate_report(ctx, "tunneling to "IP_FMT" via %s",
2729 IP_ARGS(d_ip), netdev_get_name(out_dev->netdev));
2731 /* Use mac addr of bridge port of the peer. */
2732 err = netdev_get_etheraddr(out_dev->netdev, smac);
2734 xlate_report(ctx, "tunnel output device lacks Ethernet address");
2738 err = netdev_get_in4(out_dev->netdev, (struct in_addr *) &s_ip, NULL);
2740 xlate_report(ctx, "tunnel output device lacks IPv4 address");
2744 err = tnl_arp_lookup(out_dev->xbridge->name, d_ip, dmac);
2746 xlate_report(ctx, "ARP cache miss for "IP_FMT" on bridge %s, "
2747 "sending ARP request",
2748 IP_ARGS(d_ip), out_dev->xbridge->name);
2749 tnl_send_arp_request(out_dev, smac, s_ip, d_ip);
2752 if (ctx->xin->xcache) {
2753 struct xc_entry *entry;
2755 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_TNL_ARP);
2756 ovs_strlcpy(entry->u.tnl_arp_cache.br_name, out_dev->xbridge->name,
2757 sizeof entry->u.tnl_arp_cache.br_name);
2758 entry->u.tnl_arp_cache.d_ip = d_ip;
2761 xlate_report(ctx, "tunneling from "ETH_ADDR_FMT" "IP_FMT
2762 " to "ETH_ADDR_FMT" "IP_FMT,
2763 ETH_ADDR_ARGS(smac), IP_ARGS(s_ip),
2764 ETH_ADDR_ARGS(dmac), IP_ARGS(d_ip));
2765 err = tnl_port_build_header(xport->ofport, flow,
2766 dmac, smac, s_ip, &tnl_push_data);
2770 tnl_push_data.tnl_port = odp_to_u32(tunnel_odp_port);
2771 tnl_push_data.out_port = odp_to_u32(out_dev->odp_port);
2772 odp_put_tnl_push_action(ctx->odp_actions, &tnl_push_data);
2777 compose_output_action__(struct xlate_ctx *ctx, ofp_port_t ofp_port,
2778 const struct xlate_bond_recirc *xr, bool check_stp)
2780 const struct xport *xport = get_ofp_port(ctx->xbridge, ofp_port);
2781 struct flow_wildcards *wc = ctx->wc;
2782 struct flow *flow = &ctx->xin->flow;
2783 struct flow_tnl flow_tnl;
2784 ovs_be16 flow_vlan_tci;
2785 uint32_t flow_pkt_mark;
2786 uint8_t flow_nw_tos;
2787 odp_port_t out_port, odp_port;
2788 bool tnl_push_pop_send = false;
2791 /* If 'struct flow' gets additional metadata, we'll need to zero it out
2792 * before traversing a patch port. */
2793 BUILD_ASSERT_DECL(FLOW_WC_SEQ == 33);
2794 memset(&flow_tnl, 0, sizeof flow_tnl);
2797 xlate_report(ctx, "Nonexistent output port");
2799 } else if (xport->config & OFPUTIL_PC_NO_FWD) {
2800 xlate_report(ctx, "OFPPC_NO_FWD set, skipping output");
2802 } else if (check_stp) {
2803 if (is_stp(&ctx->base_flow)) {
2804 if (!xport_stp_should_forward_bpdu(xport) &&
2805 !xport_rstp_should_manage_bpdu(xport)) {
2806 if (ctx->xbridge->stp != NULL) {
2807 xlate_report(ctx, "STP not in listening state, "
2808 "skipping bpdu output");
2809 } else if (ctx->xbridge->rstp != NULL) {
2810 xlate_report(ctx, "RSTP not managing BPDU in this state, "
2811 "skipping bpdu output");
2815 } else if (!xport_stp_forward_state(xport) ||
2816 !xport_rstp_forward_state(xport)) {
2817 if (ctx->xbridge->stp != NULL) {
2818 xlate_report(ctx, "STP not in forwarding state, "
2820 } else if (ctx->xbridge->rstp != NULL) {
2821 xlate_report(ctx, "RSTP not in forwarding state, "
2829 const struct xport *peer = xport->peer;
2830 struct flow old_flow = ctx->xin->flow;
2831 bool old_was_mpls = ctx->was_mpls;
2832 cls_version_t old_version = ctx->tables_version;
2833 struct ofpbuf old_stack = ctx->stack;
2834 union mf_subvalue new_stack[1024 / sizeof(union mf_subvalue)];
2835 struct ofpbuf old_action_set = ctx->action_set;
2836 uint64_t actset_stub[1024 / 8];
2838 ofpbuf_use_stub(&ctx->stack, new_stack, sizeof new_stack);
2839 ofpbuf_use_stub(&ctx->action_set, actset_stub, sizeof actset_stub);
2840 ctx->xbridge = peer->xbridge;
2841 flow->in_port.ofp_port = peer->ofp_port;
2842 flow->metadata = htonll(0);
2843 memset(&flow->tunnel, 0, sizeof flow->tunnel);
2844 memset(flow->regs, 0, sizeof flow->regs);
2845 flow->actset_output = OFPP_UNSET;
2847 /* The bridge is now known so obtain its table version. */
2849 = ofproto_dpif_get_tables_version(ctx->xbridge->ofproto);
2851 if (!process_special(ctx, peer) && may_receive(peer, ctx)) {
2852 if (xport_stp_forward_state(peer) && xport_rstp_forward_state(peer)) {
2853 xlate_table_action(ctx, flow->in_port.ofp_port, 0, true, true);
2854 if (ctx->action_set.size) {
2855 /* Translate action set only if not dropping the packet and
2856 * not recirculating. */
2857 if (!exit_recirculates(ctx)) {
2858 xlate_action_set(ctx);
2861 /* Check if need to recirculate. */
2862 if (exit_recirculates(ctx)) {
2863 compose_recirculate_action(ctx);
2866 /* Forwarding is disabled by STP and RSTP. Let OFPP_NORMAL and
2867 * the learning action look at the packet, then drop it. */
2868 struct flow old_base_flow = ctx->base_flow;
2869 size_t old_size = ctx->odp_actions->size;
2870 mirror_mask_t old_mirrors = ctx->mirrors;
2872 xlate_table_action(ctx, flow->in_port.ofp_port, 0, true, true);
2873 ctx->mirrors = old_mirrors;
2874 ctx->base_flow = old_base_flow;
2875 ctx->odp_actions->size = old_size;
2877 /* Undo changes that may have been done for recirculation. */
2878 if (exit_recirculates(ctx)) {
2879 ctx->action_set.size = ctx->recirc_action_offset;
2880 ctx->recirc_action_offset = -1;
2881 ctx->last_unroll_offset = -1;
2886 ctx->xin->flow = old_flow;
2887 ctx->xbridge = xport->xbridge;
2888 ofpbuf_uninit(&ctx->action_set);
2889 ctx->action_set = old_action_set;
2890 ofpbuf_uninit(&ctx->stack);
2891 ctx->stack = old_stack;
2893 /* Restore calling bridge's lookup version. */
2894 ctx->tables_version = old_version;
2896 /* The peer bridge popping MPLS should have no effect on the original
2898 ctx->was_mpls = old_was_mpls;
2900 /* The fact that the peer bridge exits (for any reason) does not mean
2901 * that the original bridge should exit. Specifically, if the peer
2902 * bridge recirculates (which typically modifies the packet), the
2903 * original bridge must continue processing with the original, not the
2904 * recirculated packet! */
2907 if (ctx->xin->resubmit_stats) {
2908 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
2909 netdev_vport_inc_rx(peer->netdev, ctx->xin->resubmit_stats);
2911 bfd_account_rx(peer->bfd, ctx->xin->resubmit_stats);
2914 if (ctx->xin->xcache) {
2915 struct xc_entry *entry;
2917 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NETDEV);
2918 entry->u.dev.tx = netdev_ref(xport->netdev);
2919 entry->u.dev.rx = netdev_ref(peer->netdev);
2920 entry->u.dev.bfd = bfd_ref(peer->bfd);
2925 flow_vlan_tci = flow->vlan_tci;
2926 flow_pkt_mark = flow->pkt_mark;
2927 flow_nw_tos = flow->nw_tos;
2929 if (count_skb_priorities(xport)) {
2930 memset(&wc->masks.skb_priority, 0xff, sizeof wc->masks.skb_priority);
2931 if (dscp_from_skb_priority(xport, flow->skb_priority, &dscp)) {
2932 wc->masks.nw_tos |= IP_DSCP_MASK;
2933 flow->nw_tos &= ~IP_DSCP_MASK;
2934 flow->nw_tos |= dscp;
2938 if (xport->is_tunnel) {
2939 /* Save tunnel metadata so that changes made due to
2940 * the Logical (tunnel) Port are not visible for any further
2941 * matches, while explicit set actions on tunnel metadata are.
2943 flow_tnl = flow->tunnel;
2944 odp_port = tnl_port_send(xport->ofport, flow, ctx->wc);
2945 if (odp_port == ODPP_NONE) {
2946 xlate_report(ctx, "Tunneling decided against output");
2947 goto out; /* restore flow_nw_tos */
2949 if (flow->tunnel.ip_dst == ctx->orig_tunnel_ip_dst) {
2950 xlate_report(ctx, "Not tunneling to our own address");
2951 goto out; /* restore flow_nw_tos */
2953 if (ctx->xin->resubmit_stats) {
2954 netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats);
2956 if (ctx->xin->xcache) {
2957 struct xc_entry *entry;
2959 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NETDEV);
2960 entry->u.dev.tx = netdev_ref(xport->netdev);
2962 out_port = odp_port;
2963 if (ovs_native_tunneling_is_on(ctx->xbridge->ofproto)) {
2964 xlate_report(ctx, "output to native tunnel");
2965 tnl_push_pop_send = true;
2967 xlate_report(ctx, "output to kernel tunnel");
2968 commit_odp_tunnel_action(flow, &ctx->base_flow, ctx->odp_actions);
2969 flow->tunnel = flow_tnl; /* Restore tunnel metadata */
2972 odp_port = xport->odp_port;
2973 out_port = odp_port;
2974 if (ofproto_has_vlan_splinters(ctx->xbridge->ofproto)) {
2975 ofp_port_t vlandev_port;
2977 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
2978 vlandev_port = vsp_realdev_to_vlandev(ctx->xbridge->ofproto,
2979 ofp_port, flow->vlan_tci);
2980 if (vlandev_port != ofp_port) {
2981 out_port = ofp_port_to_odp_port(ctx->xbridge, vlandev_port);
2982 flow->vlan_tci = htons(0);
2987 if (out_port != ODPP_NONE) {
2988 bool use_masked = ctx->xbridge->support.masked_set_action;
2990 ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow,
2995 struct ovs_action_hash *act_hash;
2998 act_hash = nl_msg_put_unspec_uninit(ctx->odp_actions,
2999 OVS_ACTION_ATTR_HASH,
3001 act_hash->hash_alg = xr->hash_alg;
3002 act_hash->hash_basis = xr->hash_basis;
3004 /* Recirc action. */
3005 nl_msg_put_u32(ctx->odp_actions, OVS_ACTION_ATTR_RECIRC,
3009 if (tnl_push_pop_send) {
3010 build_tunnel_send(ctx, xport, flow, odp_port);
3011 flow->tunnel = flow_tnl; /* Restore tunnel metadata */
3013 odp_port_t odp_tnl_port = ODPP_NONE;
3015 /* XXX: Write better Filter for tunnel port. We can use inport
3016 * int tunnel-port flow to avoid these checks completely. */
3017 if (ofp_port == OFPP_LOCAL &&
3018 ovs_native_tunneling_is_on(ctx->xbridge->ofproto)) {
3020 odp_tnl_port = tnl_port_map_lookup(flow, wc);
3023 if (odp_tnl_port != ODPP_NONE) {
3024 nl_msg_put_odp_port(ctx->odp_actions,
3025 OVS_ACTION_ATTR_TUNNEL_POP,
3028 /* Tunnel push-pop action is not compatible with
3030 compose_ipfix_action(ctx, out_port);
3031 nl_msg_put_odp_port(ctx->odp_actions,
3032 OVS_ACTION_ATTR_OUTPUT,
3038 ctx->sflow_odp_port = odp_port;
3039 ctx->sflow_n_outputs++;
3040 ctx->nf_output_iface = ofp_port;
3043 if (mbridge_has_mirrors(ctx->xbridge->mbridge) && xport->xbundle) {
3044 mirror_packet(ctx, xport->xbundle,
3045 xbundle_mirror_dst(xport->xbundle->xbridge,
3051 flow->vlan_tci = flow_vlan_tci;
3052 flow->pkt_mark = flow_pkt_mark;
3053 flow->nw_tos = flow_nw_tos;
3057 compose_output_action(struct xlate_ctx *ctx, ofp_port_t ofp_port,
3058 const struct xlate_bond_recirc *xr)
3060 compose_output_action__(ctx, ofp_port, xr, true);
3064 xlate_recursively(struct xlate_ctx *ctx, struct rule_dpif *rule)
3066 struct rule_dpif *old_rule = ctx->rule;
3067 ovs_be64 old_cookie = ctx->rule_cookie;
3068 const struct rule_actions *actions;
3070 if (ctx->xin->resubmit_stats) {
3071 rule_dpif_credit_stats(rule, ctx->xin->resubmit_stats);
3077 ctx->rule_cookie = rule_dpif_get_flow_cookie(rule);
3078 actions = rule_dpif_get_actions(rule);
3079 do_xlate_actions(actions->ofpacts, actions->ofpacts_len, ctx);
3080 ctx->rule_cookie = old_cookie;
3081 ctx->rule = old_rule;
3086 xlate_resubmit_resource_check(struct xlate_ctx *ctx)
3088 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
3090 if (ctx->recurse >= MAX_RESUBMIT_RECURSION + MAX_INTERNAL_RESUBMITS) {
3091 VLOG_ERR_RL(&rl, "resubmit actions recursed over %d times",
3092 MAX_RESUBMIT_RECURSION);
3093 } else if (ctx->resubmits >= MAX_RESUBMITS + MAX_INTERNAL_RESUBMITS) {
3094 VLOG_ERR_RL(&rl, "over %d resubmit actions", MAX_RESUBMITS);
3095 } else if (ctx->odp_actions->size > UINT16_MAX) {
3096 VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of actions");
3097 } else if (ctx->stack.size >= 65536) {
3098 VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of stack");
3107 xlate_table_action(struct xlate_ctx *ctx, ofp_port_t in_port, uint8_t table_id,
3108 bool may_packet_in, bool honor_table_miss)
3110 /* Check if we need to recirculate before matching in a table. */
3111 if (ctx->was_mpls) {
3112 ctx_trigger_recirculation(ctx);
3115 if (xlate_resubmit_resource_check(ctx)) {
3116 uint8_t old_table_id = ctx->table_id;
3117 struct rule_dpif *rule;
3119 ctx->table_id = table_id;
3121 rule = rule_dpif_lookup_from_table(ctx->xbridge->ofproto,
3122 ctx->tables_version,
3123 &ctx->xin->flow, ctx->xin->wc,
3124 ctx->xin->xcache != NULL,
3125 ctx->xin->resubmit_stats,
3126 &ctx->table_id, in_port,
3127 may_packet_in, honor_table_miss);
3129 if (OVS_UNLIKELY(ctx->xin->resubmit_hook)) {
3130 ctx->xin->resubmit_hook(ctx->xin, rule, ctx->recurse + 1);
3134 /* Fill in the cache entry here instead of xlate_recursively
3135 * to make the reference counting more explicit. We take a
3136 * reference in the lookups above if we are going to cache the
3138 if (ctx->xin->xcache) {
3139 struct xc_entry *entry;
3141 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_RULE);
3142 entry->u.rule = rule;
3144 xlate_recursively(ctx, rule);
3147 ctx->table_id = old_table_id;
3155 xlate_group_stats(struct xlate_ctx *ctx, struct group_dpif *group,
3156 struct ofputil_bucket *bucket)
3158 if (ctx->xin->resubmit_stats) {
3159 group_dpif_credit_stats(group, bucket, ctx->xin->resubmit_stats);
3161 if (ctx->xin->xcache) {
3162 struct xc_entry *entry;
3164 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_GROUP);
3165 entry->u.group.group = group_dpif_ref(group);
3166 entry->u.group.bucket = bucket;
3171 xlate_group_bucket(struct xlate_ctx *ctx, struct ofputil_bucket *bucket)
3173 uint64_t action_list_stub[1024 / 8];
3174 struct ofpbuf action_list, action_set;
3175 struct flow old_flow = ctx->xin->flow;
3176 bool old_was_mpls = ctx->was_mpls;
3178 ofpbuf_use_const(&action_set, bucket->ofpacts, bucket->ofpacts_len);
3179 ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub);
3181 ofpacts_execute_action_set(&action_list, &action_set);
3183 do_xlate_actions(action_list.data, action_list.size, ctx);
3186 ofpbuf_uninit(&action_set);
3187 ofpbuf_uninit(&action_list);
3189 /* Check if need to recirculate. */
3190 if (exit_recirculates(ctx)) {
3191 compose_recirculate_action(ctx);
3194 /* Roll back flow to previous state.
3195 * This is equivalent to cloning the packet for each bucket.
3197 * As a side effect any subsequently applied actions will
3198 * also effectively be applied to a clone of the packet taken
3199 * just before applying the all or indirect group.
3201 * Note that group buckets are action sets, hence they cannot modify the
3202 * main action set. Also any stack actions are ignored when executing an
3203 * action set, so group buckets cannot change the stack either.
3204 * However, we do allow resubmit actions in group buckets, which could
3205 * break the above assumptions. It is up to the controller to not mess up
3206 * with the action_set and stack in the tables resubmitted to from
3208 ctx->xin->flow = old_flow;
3210 /* The group bucket popping MPLS should have no effect after bucket
3212 ctx->was_mpls = old_was_mpls;
3214 /* The fact that the group bucket exits (for any reason) does not mean that
3215 * the translation after the group action should exit. Specifically, if
3216 * the group bucket recirculates (which typically modifies the packet), the
3217 * actions after the group action must continue processing with the
3218 * original, not the recirculated packet! */
3223 xlate_all_group(struct xlate_ctx *ctx, struct group_dpif *group)
3225 struct ofputil_bucket *bucket;
3226 const struct ovs_list *buckets;
3228 group_dpif_get_buckets(group, &buckets);
3230 LIST_FOR_EACH (bucket, list_node, buckets) {
3231 xlate_group_bucket(ctx, bucket);
3233 xlate_group_stats(ctx, group, NULL);
3237 xlate_ff_group(struct xlate_ctx *ctx, struct group_dpif *group)
3239 struct ofputil_bucket *bucket;
3241 bucket = group_first_live_bucket(ctx, group, 0);
3243 xlate_group_bucket(ctx, bucket);
3244 xlate_group_stats(ctx, group, bucket);
3249 xlate_default_select_group(struct xlate_ctx *ctx, struct group_dpif *group)
3251 struct flow_wildcards *wc = ctx->wc;
3252 struct ofputil_bucket *bucket;
3255 basis = flow_hash_symmetric_l4(&ctx->xin->flow, 0);
3256 flow_mask_hash_fields(&ctx->xin->flow, wc, NX_HASH_FIELDS_SYMMETRIC_L4);
3257 bucket = group_best_live_bucket(ctx, group, basis);
3259 xlate_group_bucket(ctx, bucket);
3260 xlate_group_stats(ctx, group, bucket);
3265 xlate_hash_fields_select_group(struct xlate_ctx *ctx, struct group_dpif *group)
3267 struct mf_bitmap hash_fields = MF_BITMAP_INITIALIZER;
3268 const struct field_array *fields;
3269 struct ofputil_bucket *bucket;
3273 fields = group_dpif_get_fields(group);
3274 basis = hash_uint64(group_dpif_get_selection_method_param(group));
3276 /* Determine which fields to hash */
3277 for (i = 0; i < MFF_N_IDS; i++) {
3278 if (bitmap_is_set(fields->used.bm, i)) {
3279 const struct mf_field *mf;
3281 /* If the field is already present in 'hash_fields' then
3282 * this loop has already checked that it and its pre-requisites
3283 * are present in the flow and its pre-requisites have
3284 * already been added to 'hash_fields'. There is nothing more
3285 * to do here and as an optimisation the loop can continue. */
3286 if (bitmap_is_set(hash_fields.bm, i)) {
3292 /* Only hash a field if it and its pre-requisites are present
3294 if (!mf_are_prereqs_ok(mf, &ctx->xin->flow)) {
3298 /* Hash both the field and its pre-requisites */
3299 mf_bitmap_set_field_and_prereqs(mf, &hash_fields);
3303 /* Hash the fields */
3304 for (i = 0; i < MFF_N_IDS; i++) {
3305 if (bitmap_is_set(hash_fields.bm, i)) {
3306 const struct mf_field *mf = mf_from_id(i);
3307 union mf_value value;
3310 mf_get_value(mf, &ctx->xin->flow, &value);
3311 /* This seems inefficient but so does apply_mask() */
3312 for (j = 0; j < mf->n_bytes; j++) {
3313 ((uint8_t *) &value)[j] &= ((uint8_t *) &fields->value[i])[j];
3315 basis = hash_bytes(&value, mf->n_bytes, basis);
3317 mf_mask_field(mf, &ctx->wc->masks);
3321 bucket = group_best_live_bucket(ctx, group, basis);
3323 xlate_group_bucket(ctx, bucket);
3324 xlate_group_stats(ctx, group, bucket);
3329 xlate_select_group(struct xlate_ctx *ctx, struct group_dpif *group)
3331 const char *selection_method = group_dpif_get_selection_method(group);
3333 if (selection_method[0] == '\0') {
3334 xlate_default_select_group(ctx, group);
3335 } else if (!strcasecmp("hash", selection_method)) {
3336 xlate_hash_fields_select_group(ctx, group);
3338 /* Parsing of groups should ensure this never happens */
3344 xlate_group_action__(struct xlate_ctx *ctx, struct group_dpif *group)
3346 bool was_in_group = ctx->in_group;
3347 ctx->in_group = true;
3349 switch (group_dpif_get_type(group)) {
3351 case OFPGT11_INDIRECT:
3352 xlate_all_group(ctx, group);
3354 case OFPGT11_SELECT:
3355 xlate_select_group(ctx, group);
3358 xlate_ff_group(ctx, group);
3363 group_dpif_unref(group);
3365 ctx->in_group = was_in_group;
3369 xlate_group_action(struct xlate_ctx *ctx, uint32_t group_id)
3371 if (xlate_resubmit_resource_check(ctx)) {
3372 struct group_dpif *group;
3375 got_group = group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group);
3377 xlate_group_action__(ctx, group);
3387 xlate_ofpact_resubmit(struct xlate_ctx *ctx,
3388 const struct ofpact_resubmit *resubmit)
3392 bool may_packet_in = false;
3393 bool honor_table_miss = false;
3395 if (ctx->rule && rule_dpif_is_internal(ctx->rule)) {
3396 /* Still allow missed packets to be sent to the controller
3397 * if resubmitting from an internal table. */
3398 may_packet_in = true;
3399 honor_table_miss = true;
3402 in_port = resubmit->in_port;
3403 if (in_port == OFPP_IN_PORT) {
3404 in_port = ctx->xin->flow.in_port.ofp_port;
3407 table_id = resubmit->table_id;
3408 if (table_id == 255) {
3409 table_id = ctx->table_id;
3412 xlate_table_action(ctx, in_port, table_id, may_packet_in,
3417 flood_packets(struct xlate_ctx *ctx, bool all)
3419 const struct xport *xport;
3421 HMAP_FOR_EACH (xport, ofp_node, &ctx->xbridge->xports) {
3422 if (xport->ofp_port == ctx->xin->flow.in_port.ofp_port) {
3427 compose_output_action__(ctx, xport->ofp_port, NULL, false);
3428 } else if (!(xport->config & OFPUTIL_PC_NO_FLOOD)) {
3429 compose_output_action(ctx, xport->ofp_port, NULL);
3433 ctx->nf_output_iface = NF_OUT_FLOOD;
3437 execute_controller_action(struct xlate_ctx *ctx, int len,
3438 enum ofp_packet_in_reason reason,
3439 uint16_t controller_id)
3441 struct ofproto_packet_in *pin;
3442 struct dp_packet *packet;
3445 ctx->xout->slow |= SLOW_CONTROLLER;
3446 if (!ctx->xin->packet) {
3450 packet = dp_packet_clone(ctx->xin->packet);
3452 use_masked = ctx->xbridge->support.masked_set_action;
3453 ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
3455 ctx->wc, use_masked);
3457 odp_execute_actions(NULL, &packet, 1, false,
3458 ctx->odp_actions->data, ctx->odp_actions->size, NULL);
3460 pin = xmalloc(sizeof *pin);
3461 pin->up.packet_len = dp_packet_size(packet);
3462 pin->up.packet = dp_packet_steal_data(packet);
3463 pin->up.reason = reason;
3464 pin->up.table_id = ctx->table_id;
3465 pin->up.cookie = ctx->rule_cookie;
3467 flow_get_metadata(&ctx->xin->flow, &pin->up.flow_metadata);
3469 pin->controller_id = controller_id;
3470 pin->send_len = len;
3471 /* If a rule is a table-miss rule then this is
3472 * a table-miss handled by a table-miss rule.
3474 * Else, if rule is internal and has a controller action,
3475 * the later being implied by the rule being processed here,
3476 * then this is a table-miss handled without a table-miss rule.
3478 * Otherwise this is not a table-miss. */
3479 pin->miss_type = OFPROTO_PACKET_IN_NO_MISS;
3481 if (rule_dpif_is_table_miss(ctx->rule)) {
3482 pin->miss_type = OFPROTO_PACKET_IN_MISS_FLOW;
3483 } else if (rule_dpif_is_internal(ctx->rule)) {
3484 pin->miss_type = OFPROTO_PACKET_IN_MISS_WITHOUT_FLOW;
3487 ofproto_dpif_send_packet_in(ctx->xbridge->ofproto, pin);
3488 dp_packet_delete(packet);
3491 /* Called only when ctx->recirc_action_offset is set. */
3493 compose_recirculate_action(struct xlate_ctx *ctx)
3495 struct recirc_metadata md;
3499 use_masked = ctx->xbridge->support.masked_set_action;
3500 ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
3502 ctx->wc, use_masked);
3504 recirc_metadata_from_flow(&md, &ctx->xin->flow);
3506 ovs_assert(ctx->recirc_action_offset >= 0);
3508 struct recirc_state state = {
3510 .ofproto = ctx->xbridge->ofproto,
3512 .stack = &ctx->stack,
3513 .action_set_len = ctx->recirc_action_offset,
3514 .ofpacts_len = ctx->action_set.size,
3515 .ofpacts = ctx->action_set.data,
3518 /* Only allocate recirculation ID if we have a packet. */
3519 if (ctx->xin->packet) {
3520 /* Allocate a unique recirc id for the given metadata state in the
3521 * flow. The life-cycle of this recirc id is managed by associating it
3522 * with the udpif key ('ukey') created for each new datapath flow. */
3523 id = recirc_alloc_id_ctx(&state);
3525 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
3526 VLOG_ERR_RL(&rl, "Failed to allocate recirculation id");
3529 xlate_out_add_recirc(ctx->xout, id);
3531 /* Look up an existing recirc id for the given metadata state in the
3532 * flow. No new reference is taken, as the ID is RCU protected and is
3533 * only required temporarily for verification.
3535 * This might fail and return 0. We let zero 'id' to be used in the
3536 * RECIRC action below, which will fail all revalidations as zero is
3537 * not a valid recirculation ID. */
3538 id = recirc_find_id(&state);
3541 nl_msg_put_u32(ctx->odp_actions, OVS_ACTION_ATTR_RECIRC, id);
3543 /* Undo changes done by recirculation. */
3544 ctx->action_set.size = ctx->recirc_action_offset;
3545 ctx->recirc_action_offset = -1;
3546 ctx->last_unroll_offset = -1;
3550 compose_mpls_push_action(struct xlate_ctx *ctx, struct ofpact_push_mpls *mpls)
3552 struct flow *flow = &ctx->xin->flow;
3555 ovs_assert(eth_type_mpls(mpls->ethertype));
3557 n = flow_count_mpls_labels(flow, ctx->wc);
3559 bool use_masked = ctx->xbridge->support.masked_set_action;
3561 ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow,
3563 ctx->wc, use_masked);
3564 } else if (n >= FLOW_MAX_MPLS_LABELS) {
3565 if (ctx->xin->packet != NULL) {
3566 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
3567 VLOG_WARN_RL(&rl, "bridge %s: dropping packet on which an "
3568 "MPLS push action can't be performed as it would "
3569 "have more MPLS LSEs than the %d supported.",
3570 ctx->xbridge->name, FLOW_MAX_MPLS_LABELS);
3576 flow_push_mpls(flow, n, mpls->ethertype, ctx->wc);
3580 compose_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type)
3582 struct flow *flow = &ctx->xin->flow;
3583 int n = flow_count_mpls_labels(flow, ctx->wc);
3585 if (flow_pop_mpls(flow, n, eth_type, ctx->wc)) {
3586 if (ctx->xbridge->support.odp.recirc) {
3587 ctx->was_mpls = true;
3589 } else if (n >= FLOW_MAX_MPLS_LABELS) {
3590 if (ctx->xin->packet != NULL) {
3591 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
3592 VLOG_WARN_RL(&rl, "bridge %s: dropping packet on which an "
3593 "MPLS pop action can't be performed as it has "
3594 "more MPLS LSEs than the %d supported.",
3595 ctx->xbridge->name, FLOW_MAX_MPLS_LABELS);
3598 ofpbuf_clear(ctx->odp_actions);
3603 compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids)
3605 struct flow *flow = &ctx->xin->flow;
3607 if (!is_ip_any(flow)) {
3611 ctx->wc->masks.nw_ttl = 0xff;
3612 if (flow->nw_ttl > 1) {
3618 for (i = 0; i < ids->n_controllers; i++) {
3619 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL,
3623 /* Stop processing for current table. */
3629 compose_set_mpls_label_action(struct xlate_ctx *ctx, ovs_be32 label)
3631 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
3632 ctx->wc->masks.mpls_lse[0] |= htonl(MPLS_LABEL_MASK);
3633 set_mpls_lse_label(&ctx->xin->flow.mpls_lse[0], label);
3638 compose_set_mpls_tc_action(struct xlate_ctx *ctx, uint8_t tc)
3640 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
3641 ctx->wc->masks.mpls_lse[0] |= htonl(MPLS_TC_MASK);
3642 set_mpls_lse_tc(&ctx->xin->flow.mpls_lse[0], tc);
3647 compose_set_mpls_ttl_action(struct xlate_ctx *ctx, uint8_t ttl)
3649 if (eth_type_mpls(ctx->xin->flow.dl_type)) {
3650 ctx->wc->masks.mpls_lse[0] |= htonl(MPLS_TTL_MASK);
3651 set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse[0], ttl);
3656 compose_dec_mpls_ttl_action(struct xlate_ctx *ctx)
3658 struct flow *flow = &ctx->xin->flow;
3660 if (eth_type_mpls(flow->dl_type)) {
3661 uint8_t ttl = mpls_lse_to_ttl(flow->mpls_lse[0]);
3663 ctx->wc->masks.mpls_lse[0] |= htonl(MPLS_TTL_MASK);
3666 set_mpls_lse_ttl(&flow->mpls_lse[0], ttl);
3669 execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, 0);
3673 /* Stop processing for current table. */
3678 xlate_output_action(struct xlate_ctx *ctx,
3679 ofp_port_t port, uint16_t max_len, bool may_packet_in)
3681 ofp_port_t prev_nf_output_iface = ctx->nf_output_iface;
3683 ctx->nf_output_iface = NF_OUT_DROP;
3687 compose_output_action(ctx, ctx->xin->flow.in_port.ofp_port, NULL);
3690 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
3691 0, may_packet_in, true);
3697 flood_packets(ctx, false);
3700 flood_packets(ctx, true);
3702 case OFPP_CONTROLLER:
3703 execute_controller_action(ctx, max_len,
3704 (ctx->in_group ? OFPR_GROUP
3705 : ctx->in_action_set ? OFPR_ACTION_SET
3713 if (port != ctx->xin->flow.in_port.ofp_port) {
3714 compose_output_action(ctx, port, NULL);
3716 xlate_report(ctx, "skipping output to input port");
3721 if (prev_nf_output_iface == NF_OUT_FLOOD) {
3722 ctx->nf_output_iface = NF_OUT_FLOOD;
3723 } else if (ctx->nf_output_iface == NF_OUT_DROP) {
3724 ctx->nf_output_iface = prev_nf_output_iface;
3725 } else if (prev_nf_output_iface != NF_OUT_DROP &&
3726 ctx->nf_output_iface != NF_OUT_FLOOD) {
3727 ctx->nf_output_iface = NF_OUT_MULTI;
3732 xlate_output_reg_action(struct xlate_ctx *ctx,
3733 const struct ofpact_output_reg *or)
3735 uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow);
3736 if (port <= UINT16_MAX) {
3737 union mf_subvalue value;
3739 memset(&value, 0xff, sizeof value);
3740 mf_write_subfield_flow(&or->src, &value, &ctx->wc->masks);
3741 xlate_output_action(ctx, u16_to_ofp(port),
3742 or->max_len, false);
3747 xlate_enqueue_action(struct xlate_ctx *ctx,
3748 const struct ofpact_enqueue *enqueue)
3750 ofp_port_t ofp_port = enqueue->port;
3751 uint32_t queue_id = enqueue->queue;
3752 uint32_t flow_priority, priority;
3755 /* Translate queue to priority. */
3756 error = dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &priority);
3758 /* Fall back to ordinary output action. */
3759 xlate_output_action(ctx, enqueue->port, 0, false);
3763 /* Check output port. */
3764 if (ofp_port == OFPP_IN_PORT) {
3765 ofp_port = ctx->xin->flow.in_port.ofp_port;
3766 } else if (ofp_port == ctx->xin->flow.in_port.ofp_port) {
3770 /* Add datapath actions. */
3771 flow_priority = ctx->xin->flow.skb_priority;
3772 ctx->xin->flow.skb_priority = priority;
3773 compose_output_action(ctx, ofp_port, NULL);
3774 ctx->xin->flow.skb_priority = flow_priority;
3776 /* Update NetFlow output port. */
3777 if (ctx->nf_output_iface == NF_OUT_DROP) {
3778 ctx->nf_output_iface = ofp_port;
3779 } else if (ctx->nf_output_iface != NF_OUT_FLOOD) {
3780 ctx->nf_output_iface = NF_OUT_MULTI;
3785 xlate_set_queue_action(struct xlate_ctx *ctx, uint32_t queue_id)
3787 uint32_t skb_priority;
3789 if (!dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &skb_priority)) {
3790 ctx->xin->flow.skb_priority = skb_priority;
3792 /* Couldn't translate queue to a priority. Nothing to do. A warning
3793 * has already been logged. */
3798 slave_enabled_cb(ofp_port_t ofp_port, void *xbridge_)
3800 const struct xbridge *xbridge = xbridge_;
3811 case OFPP_CONTROLLER: /* Not supported by the bundle action. */
3814 port = get_ofp_port(xbridge, ofp_port);
3815 return port ? port->may_enable : false;
3820 xlate_bundle_action(struct xlate_ctx *ctx,
3821 const struct ofpact_bundle *bundle)
3825 port = bundle_execute(bundle, &ctx->xin->flow, ctx->wc, slave_enabled_cb,
3826 CONST_CAST(struct xbridge *, ctx->xbridge));
3827 if (bundle->dst.field) {
3828 nxm_reg_load(&bundle->dst, ofp_to_u16(port), &ctx->xin->flow, ctx->wc);
3830 xlate_output_action(ctx, port, 0, false);
3835 xlate_learn_action__(struct xlate_ctx *ctx, const struct ofpact_learn *learn,
3836 struct ofputil_flow_mod *fm, struct ofpbuf *ofpacts)
3838 learn_execute(learn, &ctx->xin->flow, fm, ofpacts);
3839 if (ctx->xin->may_learn) {
3840 ofproto_dpif_flow_mod(ctx->xbridge->ofproto, fm);
3845 xlate_learn_action(struct xlate_ctx *ctx, const struct ofpact_learn *learn)
3847 learn_mask(learn, ctx->wc);
3849 if (ctx->xin->xcache) {
3850 struct xc_entry *entry;
3852 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_LEARN);
3853 entry->u.learn.ofproto = ctx->xbridge->ofproto;
3854 entry->u.learn.fm = xmalloc(sizeof *entry->u.learn.fm);
3855 entry->u.learn.ofpacts = ofpbuf_new(64);
3856 xlate_learn_action__(ctx, learn, entry->u.learn.fm,
3857 entry->u.learn.ofpacts);
3858 } else if (ctx->xin->may_learn) {
3859 uint64_t ofpacts_stub[1024 / 8];
3860 struct ofputil_flow_mod fm;
3861 struct ofpbuf ofpacts;
3863 ofpbuf_use_stub(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
3864 xlate_learn_action__(ctx, learn, &fm, &ofpacts);
3865 ofpbuf_uninit(&ofpacts);
3870 xlate_fin_timeout__(struct rule_dpif *rule, uint16_t tcp_flags,
3871 uint16_t idle_timeout, uint16_t hard_timeout)
3873 if (tcp_flags & (TCP_FIN | TCP_RST)) {
3874 rule_dpif_reduce_timeouts(rule, idle_timeout, hard_timeout);
3879 xlate_fin_timeout(struct xlate_ctx *ctx,
3880 const struct ofpact_fin_timeout *oft)
3883 xlate_fin_timeout__(ctx->rule, ctx->xin->tcp_flags,
3884 oft->fin_idle_timeout, oft->fin_hard_timeout);
3885 if (ctx->xin->xcache) {
3886 struct xc_entry *entry;
3888 entry = xlate_cache_add_entry(ctx->xin->xcache, XC_FIN_TIMEOUT);
3889 /* XC_RULE already holds a reference on the rule, none is taken
3891 entry->u.fin.rule = ctx->rule;
3892 entry->u.fin.idle = oft->fin_idle_timeout;
3893 entry->u.fin.hard = oft->fin_hard_timeout;
3899 xlate_sample_action(struct xlate_ctx *ctx,
3900 const struct ofpact_sample *os)
3902 /* Scale the probability from 16-bit to 32-bit while representing
3903 * the same percentage. */
3904 uint32_t probability = (os->probability << 16) | os->probability;
3907 if (!ctx->xbridge->support.variable_length_userdata) {
3908 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
3910 VLOG_ERR_RL(&rl, "ignoring NXAST_SAMPLE action because datapath "
3911 "lacks support (needs Linux 3.10+ or kernel module from "
3916 use_masked = ctx->xbridge->support.masked_set_action;
3917 ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow,
3919 ctx->wc, use_masked);
3921 union user_action_cookie cookie = {
3923 .type = USER_ACTION_COOKIE_FLOW_SAMPLE,
3924 .probability = os->probability,
3925 .collector_set_id = os->collector_set_id,
3926 .obs_domain_id = os->obs_domain_id,
3927 .obs_point_id = os->obs_point_id,
3930 compose_sample_action(ctx, probability, &cookie, sizeof cookie.flow_sample,
3935 may_receive(const struct xport *xport, struct xlate_ctx *ctx)
3937 if (xport->config & (is_stp(&ctx->xin->flow)
3938 ? OFPUTIL_PC_NO_RECV_STP
3939 : OFPUTIL_PC_NO_RECV)) {
3943 /* Only drop packets here if both forwarding and learning are
3944 * disabled. If just learning is enabled, we need to have
3945 * OFPP_NORMAL and the learning action have a look at the packet
3946 * before we can drop it. */
3947 if ((!xport_stp_forward_state(xport) && !xport_stp_learn_state(xport)) ||
3948 (!xport_rstp_forward_state(xport) && !xport_rstp_learn_state(xport))) {
3956 xlate_write_actions(struct xlate_ctx *ctx, const struct ofpact *a)
3958 const struct ofpact_nest *on = ofpact_get_WRITE_ACTIONS(a);
3959 size_t on_len = ofpact_nest_get_action_len(on);
3960 const struct ofpact *inner;
3962 /* Maintain actset_output depending on the contents of the action set:
3964 * - OFPP_UNSET, if there is no "output" action.
3966 * - The output port, if there is an "output" action and no "group"
3969 * - OFPP_UNSET, if there is a "group" action.
3971 if (!ctx->action_set_has_group) {
3972 OFPACT_FOR_EACH (inner, on->actions, on_len) {
3973 if (inner->type == OFPACT_OUTPUT) {
3974 ctx->xin->flow.actset_output = ofpact_get_OUTPUT(inner)->port;
3975 } else if (inner->type == OFPACT_GROUP) {
3976 ctx->xin->flow.actset_output = OFPP_UNSET;
3977 ctx->action_set_has_group = true;
3983 ofpbuf_put(&ctx->action_set, on->actions, on_len);
3984 ofpact_pad(&ctx->action_set);
3988 xlate_action_set(struct xlate_ctx *ctx)
3990 uint64_t action_list_stub[1024 / 64];
3991 struct ofpbuf action_list;
3993 ctx->in_action_set = true;
3994 ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub);
3995 ofpacts_execute_action_set(&action_list, &ctx->action_set);
3996 /* Clear the action set, as it is not needed any more. */
3997 ofpbuf_clear(&ctx->action_set);
3998 do_xlate_actions(action_list.data, action_list.size, ctx);
3999 ctx->in_action_set = false;
4000 ofpbuf_uninit(&action_list);
4004 recirc_put_unroll_xlate(struct xlate_ctx *ctx)
4006 struct ofpact_unroll_xlate *unroll;
4008 unroll = ctx->last_unroll_offset < 0
4010 : ALIGNED_CAST(struct ofpact_unroll_xlate *,
4011 (char *)ctx->action_set.data + ctx->last_unroll_offset);
4013 /* Restore the table_id and rule cookie for a potential PACKET
4016 (ctx->table_id != unroll->rule_table_id
4017 || ctx->rule_cookie != unroll->rule_cookie)) {
4019 ctx->last_unroll_offset = ctx->action_set.size;
4020 unroll = ofpact_put_UNROLL_XLATE(&ctx->action_set);
4021 unroll->rule_table_id = ctx->table_id;
4022 unroll->rule_cookie = ctx->rule_cookie;
4027 /* Copy remaining actions to the action_set to be executed after recirculation.
4028 * UNROLL_XLATE action is inserted, if not already done so, before actions that
4029 * may generate PACKET_INs from the current table and without matching another
4032 recirc_unroll_actions(const struct ofpact *ofpacts, size_t ofpacts_len,
4033 struct xlate_ctx *ctx)
4035 const struct ofpact *a;
4037 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
4039 /* May generate PACKET INs. */
4040 case OFPACT_OUTPUT_REG:
4043 case OFPACT_CONTROLLER:
4044 case OFPACT_DEC_MPLS_TTL:
4045 case OFPACT_DEC_TTL:
4046 recirc_put_unroll_xlate(ctx);
4049 /* These may not generate PACKET INs. */
4050 case OFPACT_SET_TUNNEL:
4051 case OFPACT_REG_MOVE:
4052 case OFPACT_SET_FIELD:
4053 case OFPACT_STACK_PUSH:
4054 case OFPACT_STACK_POP:
4056 case OFPACT_WRITE_METADATA:
4057 case OFPACT_RESUBMIT: /* May indirectly generate PACKET INs, */
4058 case OFPACT_GOTO_TABLE: /* but from a different table and rule. */
4059 case OFPACT_ENQUEUE:
4060 case OFPACT_SET_VLAN_VID:
4061 case OFPACT_SET_VLAN_PCP:
4062 case OFPACT_STRIP_VLAN:
4063 case OFPACT_PUSH_VLAN:
4064 case OFPACT_SET_ETH_SRC:
4065 case OFPACT_SET_ETH_DST:
4066 case OFPACT_SET_IPV4_SRC:
4067 case OFPACT_SET_IPV4_DST:
4068 case OFPACT_SET_IP_DSCP:
4069 case OFPACT_SET_IP_ECN:
4070 case OFPACT_SET_IP_TTL:
4071 case OFPACT_SET_L4_SRC_PORT:
4072 case OFPACT_SET_L4_DST_PORT:
4073 case OFPACT_SET_QUEUE:
4074 case OFPACT_POP_QUEUE:
4075 case OFPACT_PUSH_MPLS:
4076 case OFPACT_POP_MPLS:
4077 case OFPACT_SET_MPLS_LABEL:
4078 case OFPACT_SET_MPLS_TC:
4079 case OFPACT_SET_MPLS_TTL:
4080 case OFPACT_MULTIPATH:
4083 case OFPACT_UNROLL_XLATE:
4084 case OFPACT_FIN_TIMEOUT:
4085 case OFPACT_CLEAR_ACTIONS:
4086 case OFPACT_WRITE_ACTIONS:
4089 case OFPACT_DEBUG_RECIRC:
4092 /* These need not be copied for restoration. */
4094 case OFPACT_CONJUNCTION:
4097 /* Copy the action over. */
4098 ofpbuf_put(&ctx->action_set, a, OFPACT_ALIGN(a->len));
4102 #define CHECK_MPLS_RECIRCULATION() \
4103 if (ctx->was_mpls) { \
4104 ctx_trigger_recirculation(ctx); \
4107 #define CHECK_MPLS_RECIRCULATION_IF(COND) \
4109 CHECK_MPLS_RECIRCULATION(); \
4113 do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len,
4114 struct xlate_ctx *ctx)
4116 struct flow_wildcards *wc = ctx->wc;
4117 struct flow *flow = &ctx->xin->flow;
4118 const struct ofpact *a;
4120 if (ovs_native_tunneling_is_on(ctx->xbridge->ofproto)) {
4121 tnl_arp_snoop(flow, wc, ctx->xbridge->name);
4123 /* dl_type already in the mask, not set below. */
4125 OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
4126 struct ofpact_controller *controller;
4127 const struct ofpact_metadata *metadata;
4128 const struct ofpact_set_field *set_field;
4129 const struct mf_field *mf;
4132 /* Check if need to store the remaining actions for later
4134 if (exit_recirculates(ctx)) {
4135 recirc_unroll_actions(a, OFPACT_ALIGN(ofpacts_len -
4137 (uint8_t *)ofpacts)),
4145 xlate_output_action(ctx, ofpact_get_OUTPUT(a)->port,
4146 ofpact_get_OUTPUT(a)->max_len, true);
4150 if (xlate_group_action(ctx, ofpact_get_GROUP(a)->group_id)) {
4151 /* Group could not be found. */
4156 case OFPACT_CONTROLLER:
4157 controller = ofpact_get_CONTROLLER(a);
4158 execute_controller_action(ctx, controller->max_len,
4160 controller->controller_id);
4163 case OFPACT_ENQUEUE:
4164 memset(&wc->masks.skb_priority, 0xff,
4165 sizeof wc->masks.skb_priority);
4166 xlate_enqueue_action(ctx, ofpact_get_ENQUEUE(a));
4169 case OFPACT_SET_VLAN_VID:
4170 wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
4171 if (flow->vlan_tci & htons(VLAN_CFI) ||
4172 ofpact_get_SET_VLAN_VID(a)->push_vlan_if_needed) {
4173 flow->vlan_tci &= ~htons(VLAN_VID_MASK);
4174 flow->vlan_tci |= (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid)
4179 case OFPACT_SET_VLAN_PCP:
4180 wc->masks.vlan_tci |= htons(VLAN_PCP_MASK | VLAN_CFI);
4181 if (flow->vlan_tci & htons(VLAN_CFI) ||
4182 ofpact_get_SET_VLAN_PCP(a)->push_vlan_if_needed) {
4183 flow->vlan_tci &= ~htons(VLAN_PCP_MASK);
4184 flow->vlan_tci |= htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp
4185 << VLAN_PCP_SHIFT) | VLAN_CFI);
4189 case OFPACT_STRIP_VLAN:
4190 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
4191 flow->vlan_tci = htons(0);
4194 case OFPACT_PUSH_VLAN:
4195 /* XXX 802.1AD(QinQ) */
4196 memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci);
4197 flow->vlan_tci = htons(VLAN_CFI);
4200 case OFPACT_SET_ETH_SRC:
4201 memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src);
4202 memcpy(flow->dl_src, ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN);
4205 case OFPACT_SET_ETH_DST:
4206 memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst);
4207 memcpy(flow->dl_dst, ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN);
4210 case OFPACT_SET_IPV4_SRC:
4211 CHECK_MPLS_RECIRCULATION();
4212 if (flow->dl_type == htons(ETH_TYPE_IP)) {
4213 memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src);
4214 flow->nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4;
4218 case OFPACT_SET_IPV4_DST:
4219 CHECK_MPLS_RECIRCULATION();
4220 if (flow->dl_type == htons(ETH_TYPE_IP)) {
4221 memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst);
4222 flow->nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4;
4226 case OFPACT_SET_IP_DSCP:
4227 CHECK_MPLS_RECIRCULATION();
4228 if (is_ip_any(flow)) {
4229 wc->masks.nw_tos |= IP_DSCP_MASK;
4230 flow->nw_tos &= ~IP_DSCP_MASK;
4231 flow->nw_tos |= ofpact_get_SET_IP_DSCP(a)->dscp;
4235 case OFPACT_SET_IP_ECN:
4236 CHECK_MPLS_RECIRCULATION();
4237 if (is_ip_any(flow)) {
4238 wc->masks.nw_tos |= IP_ECN_MASK;
4239 flow->nw_tos &= ~IP_ECN_MASK;
4240 flow->nw_tos |= ofpact_get_SET_IP_ECN(a)->ecn;
4244 case OFPACT_SET_IP_TTL:
4245 CHECK_MPLS_RECIRCULATION();
4246 if (is_ip_any(flow)) {
4247 wc->masks.nw_ttl = 0xff;
4248 flow->nw_ttl = ofpact_get_SET_IP_TTL(a)->ttl;
4252 case OFPACT_SET_L4_SRC_PORT:
4253 CHECK_MPLS_RECIRCULATION();
4254 if (is_ip_any(flow) && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
4255 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
4256 memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src);
4257 flow->tp_src = htons(ofpact_get_SET_L4_SRC_PORT(a)->port);
4261 case OFPACT_SET_L4_DST_PORT:
4262 CHECK_MPLS_RECIRCULATION();
4263 if (is_ip_any(flow) && !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
4264 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
4265 memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst);
4266 flow->tp_dst = htons(ofpact_get_SET_L4_DST_PORT(a)->port);
4270 case OFPACT_RESUBMIT:
4271 xlate_ofpact_resubmit(ctx, ofpact_get_RESUBMIT(a));
4274 case OFPACT_SET_TUNNEL:
4275 flow->tunnel.tun_id = htonll(ofpact_get_SET_TUNNEL(a)->tun_id);
4278 case OFPACT_SET_QUEUE:
4279 memset(&wc->masks.skb_priority, 0xff,
4280 sizeof wc->masks.skb_priority);
4281 xlate_set_queue_action(ctx, ofpact_get_SET_QUEUE(a)->queue_id);
4284 case OFPACT_POP_QUEUE:
4285 memset(&wc->masks.skb_priority, 0xff,
4286 sizeof wc->masks.skb_priority);
4287 flow->skb_priority = ctx->orig_skb_priority;
4290 case OFPACT_REG_MOVE:
4291 CHECK_MPLS_RECIRCULATION_IF(
4292 mf_is_l3_or_higher(ofpact_get_REG_MOVE(a)->dst.field) ||
4293 mf_is_l3_or_higher(ofpact_get_REG_MOVE(a)->src.field));
4294 nxm_execute_reg_move(ofpact_get_REG_MOVE(a), flow, wc);
4297 case OFPACT_SET_FIELD:
4298 CHECK_MPLS_RECIRCULATION_IF(
4299 mf_is_l3_or_higher(ofpact_get_SET_FIELD(a)->field));
4300 set_field = ofpact_get_SET_FIELD(a);
4301 mf = set_field->field;
4303 /* Set field action only ever overwrites packet's outermost
4304 * applicable header fields. Do nothing if no header exists. */
4305 if (mf->id == MFF_VLAN_VID) {
4306 wc->masks.vlan_tci |= htons(VLAN_CFI);
4307 if (!(flow->vlan_tci & htons(VLAN_CFI))) {
4310 } else if ((mf->id == MFF_MPLS_LABEL || mf->id == MFF_MPLS_TC)
4311 /* 'dl_type' is already unwildcarded. */
4312 && !eth_type_mpls(flow->dl_type)) {
4315 /* A flow may wildcard nw_frag. Do nothing if setting a trasport
4316 * header field on a packet that does not have them. */
4317 mf_mask_field_and_prereqs(mf, &wc->masks);
4318 if (mf_are_prereqs_ok(mf, flow)) {
4319 mf_set_flow_value_masked(mf, &set_field->value,
4320 &set_field->mask, flow);
4324 case OFPACT_STACK_PUSH:
4325 CHECK_MPLS_RECIRCULATION_IF(
4326 mf_is_l3_or_higher(ofpact_get_STACK_PUSH(a)->subfield.field));
4327 nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), flow, wc,
4331 case OFPACT_STACK_POP:
4332 CHECK_MPLS_RECIRCULATION_IF(
4333 mf_is_l3_or_higher(ofpact_get_STACK_POP(a)->subfield.field));
4334 nxm_execute_stack_pop(ofpact_get_STACK_POP(a), flow, wc,
4338 case OFPACT_PUSH_MPLS:
4339 /* Recirculate if it is an IP packet with a zero ttl. This may
4340 * indicate that the packet was previously MPLS and an MPLS pop
4341 * action converted it to IP. In this case recirculating should
4342 * reveal the IP TTL which is used as the basis for a new MPLS
4344 CHECK_MPLS_RECIRCULATION_IF(
4345 !flow_count_mpls_labels(flow, wc)
4346 && flow->nw_ttl == 0
4347 && is_ip_any(flow));
4348 compose_mpls_push_action(ctx, ofpact_get_PUSH_MPLS(a));
4351 case OFPACT_POP_MPLS:
4352 CHECK_MPLS_RECIRCULATION();
4353 compose_mpls_pop_action(ctx, ofpact_get_POP_MPLS(a)->ethertype);
4356 case OFPACT_SET_MPLS_LABEL:
4357 CHECK_MPLS_RECIRCULATION();
4358 compose_set_mpls_label_action(
4359 ctx, ofpact_get_SET_MPLS_LABEL(a)->label);
4362 case OFPACT_SET_MPLS_TC:
4363 CHECK_MPLS_RECIRCULATION();
4364 compose_set_mpls_tc_action(ctx, ofpact_get_SET_MPLS_TC(a)->tc);
4367 case OFPACT_SET_MPLS_TTL:
4368 CHECK_MPLS_RECIRCULATION();
4369 compose_set_mpls_ttl_action(ctx, ofpact_get_SET_MPLS_TTL(a)->ttl);
4372 case OFPACT_DEC_MPLS_TTL:
4373 CHECK_MPLS_RECIRCULATION();
4374 if (compose_dec_mpls_ttl_action(ctx)) {
4379 case OFPACT_DEC_TTL:
4380 CHECK_MPLS_RECIRCULATION();
4381 wc->masks.nw_ttl = 0xff;
4382 if (compose_dec_ttl(ctx, ofpact_get_DEC_TTL(a))) {
4388 /* Nothing to do. */
4391 case OFPACT_MULTIPATH:
4392 CHECK_MPLS_RECIRCULATION();
4393 multipath_execute(ofpact_get_MULTIPATH(a), flow, wc);
4397 CHECK_MPLS_RECIRCULATION();
4398 xlate_bundle_action(ctx, ofpact_get_BUNDLE(a));
4401 case OFPACT_OUTPUT_REG:
4402 xlate_output_reg_action(ctx, ofpact_get_OUTPUT_REG(a));
4406 CHECK_MPLS_RECIRCULATION();
4407 xlate_learn_action(ctx, ofpact_get_LEARN(a));
4410 case OFPACT_CONJUNCTION: {
4411 /* A flow with a "conjunction" action represents part of a special
4412 * kind of "set membership match". Such a flow should not actually
4413 * get executed, but it could via, say, a "packet-out", even though
4414 * that wouldn't be useful. Log it to help debugging. */
4415 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
4416 VLOG_INFO_RL(&rl, "executing no-op conjunction action");
4424 case OFPACT_UNROLL_XLATE: {
4425 struct ofpact_unroll_xlate *unroll = ofpact_get_UNROLL_XLATE(a);
4427 /* Restore translation context data that was stored earlier. */
4428 ctx->table_id = unroll->rule_table_id;
4429 ctx->rule_cookie = unroll->rule_cookie;
4432 case OFPACT_FIN_TIMEOUT:
4433 CHECK_MPLS_RECIRCULATION();
4434 memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto);
4435 xlate_fin_timeout(ctx, ofpact_get_FIN_TIMEOUT(a));
4438 case OFPACT_CLEAR_ACTIONS:
4439 ofpbuf_clear(&ctx->action_set);
4440 ctx->xin->flow.actset_output = OFPP_UNSET;
4441 ctx->action_set_has_group = false;
4444 case OFPACT_WRITE_ACTIONS:
4445 xlate_write_actions(ctx, a);
4448 case OFPACT_WRITE_METADATA:
4449 metadata = ofpact_get_WRITE_METADATA(a);
4450 flow->metadata &= ~metadata->mask;
4451 flow->metadata |= metadata->metadata & metadata->mask;
4455 /* Not implemented yet. */
4458 case OFPACT_GOTO_TABLE: {
4459 struct ofpact_goto_table *ogt = ofpact_get_GOTO_TABLE(a);
4461 /* Allow ctx->table_id == TBL_INTERNAL, which will be greater
4462 * than ogt->table_id. This is to allow goto_table actions that
4463 * triggered recirculation: ctx->table_id will be TBL_INTERNAL
4464 * after recirculation. */
4465 ovs_assert(ctx->table_id == TBL_INTERNAL
4466 || ctx->table_id < ogt->table_id);
4467 xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port,
4468 ogt->table_id, true, true);
4473 xlate_sample_action(ctx, ofpact_get_SAMPLE(a));
4476 case OFPACT_DEBUG_RECIRC:
4477 ctx_trigger_recirculation(ctx);
4482 /* Check if need to store this and the remaining actions for later
4484 if (ctx->exit && ctx_first_recirculation_action(ctx)) {
4485 recirc_unroll_actions(a, OFPACT_ALIGN(ofpacts_len -
4487 (uint8_t *)ofpacts)),
4495 xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto,
4496 const struct flow *flow, ofp_port_t in_port,
4497 struct rule_dpif *rule, uint16_t tcp_flags,
4498 const struct dp_packet *packet, struct flow_wildcards *wc,
4499 struct ofpbuf *odp_actions)
4501 xin->ofproto = ofproto;
4503 xin->flow.in_port.ofp_port = in_port;
4504 xin->flow.actset_output = OFPP_UNSET;
4505 xin->packet = packet;
4506 xin->may_learn = packet != NULL;
4509 xin->ofpacts = NULL;
4510 xin->ofpacts_len = 0;
4511 xin->tcp_flags = tcp_flags;
4512 xin->resubmit_hook = NULL;
4513 xin->report_hook = NULL;
4514 xin->resubmit_stats = NULL;
4516 xin->odp_actions = odp_actions;
4518 /* Do recirc lookup. */
4519 xin->recirc = flow->recirc_id
4520 ? recirc_id_node_find(flow->recirc_id)
4525 xlate_out_uninit(struct xlate_out *xout)
4528 xlate_out_free_recircs(xout);
4532 /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts'
4533 * into datapath actions, using 'ctx', and discards the datapath actions. */
4535 xlate_actions_for_side_effects(struct xlate_in *xin)
4537 struct xlate_out xout;
4539 xlate_actions(xin, &xout);
4540 xlate_out_uninit(&xout);
4543 static struct skb_priority_to_dscp *
4544 get_skb_priority(const struct xport *xport, uint32_t skb_priority)
4546 struct skb_priority_to_dscp *pdscp;
4549 hash = hash_int(skb_priority, 0);
4550 HMAP_FOR_EACH_IN_BUCKET (pdscp, hmap_node, hash, &xport->skb_priorities) {
4551 if (pdscp->skb_priority == skb_priority) {
4559 dscp_from_skb_priority(const struct xport *xport, uint32_t skb_priority,
4562 struct skb_priority_to_dscp *pdscp = get_skb_priority(xport, skb_priority);
4563 *dscp = pdscp ? pdscp->dscp : 0;
4564 return pdscp != NULL;
4568 count_skb_priorities(const struct xport *xport)
4570 return hmap_count(&xport->skb_priorities);
4574 clear_skb_priorities(struct xport *xport)
4576 struct skb_priority_to_dscp *pdscp, *next;
4578 HMAP_FOR_EACH_SAFE (pdscp, next, hmap_node, &xport->skb_priorities) {
4579 hmap_remove(&xport->skb_priorities, &pdscp->hmap_node);
4585 actions_output_to_local_port(const struct xlate_ctx *ctx)
4587 odp_port_t local_odp_port = ofp_port_to_odp_port(ctx->xbridge, OFPP_LOCAL);
4588 const struct nlattr *a;
4591 NL_ATTR_FOR_EACH_UNSAFE (a, left, ctx->odp_actions->data,
4592 ctx->odp_actions->size) {
4593 if (nl_attr_type(a) == OVS_ACTION_ATTR_OUTPUT
4594 && nl_attr_get_odp_port(a) == local_odp_port) {
4601 #if defined(__linux__)
4602 /* Returns the maximum number of packets that the Linux kernel is willing to
4603 * queue up internally to certain kinds of software-implemented ports, or the
4604 * default (and rarely modified) value if it cannot be determined. */
4606 netdev_max_backlog(void)
4608 static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
4609 static int max_backlog = 1000; /* The normal default value. */
4611 if (ovsthread_once_start(&once)) {
4612 static const char filename[] = "/proc/sys/net/core/netdev_max_backlog";
4616 stream = fopen(filename, "r");
4618 VLOG_WARN("%s: open failed (%s)", filename, ovs_strerror(errno));
4620 if (fscanf(stream, "%d", &n) != 1) {
4621 VLOG_WARN("%s: read error", filename);
4622 } else if (n <= 100) {
4623 VLOG_WARN("%s: unexpectedly small value %d", filename, n);
4629 ovsthread_once_done(&once);
4631 VLOG_DBG("%s: using %d max_backlog", filename, max_backlog);
4637 /* Counts and returns the number of OVS_ACTION_ATTR_OUTPUT actions in
4640 count_output_actions(const struct ofpbuf *odp_actions)
4642 const struct nlattr *a;
4646 NL_ATTR_FOR_EACH_UNSAFE (a, left, odp_actions->data, odp_actions->size) {
4647 if (a->nla_type == OVS_ACTION_ATTR_OUTPUT) {
4653 #endif /* defined(__linux__) */
4655 /* Returns true if 'odp_actions' contains more output actions than the datapath
4656 * can reliably handle in one go. On Linux, this is the value of the
4657 * net.core.netdev_max_backlog sysctl, which limits the maximum number of
4658 * packets that the kernel is willing to queue up for processing while the
4659 * datapath is processing a set of actions. */
4661 too_many_output_actions(const struct ofpbuf *odp_actions OVS_UNUSED)
4664 return (odp_actions->size / NL_A_U32_SIZE > netdev_max_backlog()
4665 && count_output_actions(odp_actions) > netdev_max_backlog());
4667 /* OSes other than Linux might have similar limits, but we don't know how
4668 * to determine them.*/
4674 xlate_wc_init(struct xlate_ctx *ctx)
4676 flow_wildcards_init_catchall(ctx->wc);
4678 /* Some fields we consider to always be examined. */
4679 memset(&ctx->wc->masks.in_port, 0xff, sizeof ctx->wc->masks.in_port);
4680 memset(&ctx->wc->masks.dl_type, 0xff, sizeof ctx->wc->masks.dl_type);
4681 if (is_ip_any(&ctx->xin->flow)) {
4682 ctx->wc->masks.nw_frag |= FLOW_NW_FRAG_MASK;
4685 if (ctx->xbridge->support.odp.recirc) {
4686 /* Always exactly match recirc_id when datapath supports
4688 ctx->wc->masks.recirc_id = UINT32_MAX;
4691 if (ctx->xbridge->netflow) {
4692 netflow_mask_wc(&ctx->xin->flow, ctx->wc);
4695 tnl_wc_init(&ctx->xin->flow, ctx->wc);
4699 xlate_wc_finish(struct xlate_ctx *ctx)
4701 /* Clear the metadata and register wildcard masks, because we won't
4702 * use non-header fields as part of the cache. */
4703 flow_wildcards_clear_non_packet_fields(ctx->wc);
4705 /* ICMPv4 and ICMPv6 have 8-bit "type" and "code" fields. struct flow
4706 * uses the low 8 bits of the 16-bit tp_src and tp_dst members to
4707 * represent these fields. The datapath interface, on the other hand,
4708 * represents them with just 8 bits each. This means that if the high
4709 * 8 bits of the masks for these fields somehow become set, then they
4710 * will get chopped off by a round trip through the datapath, and
4711 * revalidation will spot that as an inconsistency and delete the flow.
4712 * Avoid the problem here by making sure that only the low 8 bits of
4713 * either field can be unwildcarded for ICMP.
4715 if (is_icmpv4(&ctx->xin->flow) || is_icmpv6(&ctx->xin->flow)) {
4716 ctx->wc->masks.tp_src &= htons(UINT8_MAX);
4717 ctx->wc->masks.tp_dst &= htons(UINT8_MAX);
4719 /* VLAN_TCI CFI bit must be matched if any of the TCI is matched. */
4720 if (ctx->wc->masks.vlan_tci) {
4721 ctx->wc->masks.vlan_tci |= htons(VLAN_CFI);
4725 /* Translates the flow, actions, or rule in 'xin' into datapath actions in
4727 * The caller must take responsibility for eventually freeing 'xout', with
4728 * xlate_out_uninit(). */
4730 xlate_actions(struct xlate_in *xin, struct xlate_out *xout)
4732 *xout = (struct xlate_out) {
4738 struct xlate_cfg *xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
4739 struct xbridge *xbridge = xbridge_lookup(xcfg, xin->ofproto);
4744 struct flow *flow = &xin->flow;
4746 union mf_subvalue stack_stub[1024 / sizeof(union mf_subvalue)];
4747 uint64_t action_set_stub[1024 / 8];
4748 struct flow_wildcards scratch_wc;
4749 uint64_t actions_stub[256 / 8];
4750 struct ofpbuf scratch_actions = OFPBUF_STUB_INITIALIZER(actions_stub);
4751 struct xlate_ctx ctx = {
4755 .orig_tunnel_ip_dst = flow->tunnel.ip_dst,
4757 .stack = OFPBUF_STUB_INITIALIZER(stack_stub),
4759 .wc = xin->wc ? xin->wc : &scratch_wc,
4760 .odp_actions = xin->odp_actions ? xin->odp_actions : &scratch_actions,
4765 .in_action_set = false,
4768 .rule_cookie = OVS_BE64_MAX,
4769 .orig_skb_priority = flow->skb_priority,
4770 .sflow_n_outputs = 0,
4771 .sflow_odp_port = 0,
4772 .nf_output_iface = NF_OUT_DROP,
4776 .recirc_action_offset = -1,
4777 .last_unroll_offset = -1,
4781 .action_set_has_group = false,
4782 .action_set = OFPBUF_STUB_INITIALIZER(action_set_stub),
4785 /* 'base_flow' reflects the packet as it came in, but we need it to reflect
4786 * the packet as the datapath will treat it for output actions:
4788 * - Our datapath doesn't retain tunneling information without us
4789 * re-setting it, so clear the tunnel data.
4791 * - For VLAN splinters, a higher layer may pretend that the packet
4792 * came in on 'flow->in_port.ofp_port' with 'flow->vlan_tci'
4793 * attached, because that's how we want to treat it from an OpenFlow
4794 * perspective. But from the datapath's perspective it actually came
4795 * in on a VLAN device without any VLAN attached. So here we put the
4796 * datapath's view of the VLAN information in 'base_flow' to ensure
4797 * correct treatment.
4799 memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel);
4800 if (flow->in_port.ofp_port
4801 != vsp_realdev_to_vlandev(xbridge->ofproto,
4802 flow->in_port.ofp_port,
4804 ctx.base_flow.vlan_tci = 0;
4807 ofpbuf_reserve(ctx.odp_actions, NL_A_U32_SIZE);
4809 xlate_wc_init(&ctx);
4812 COVERAGE_INC(xlate_actions);
4815 const struct recirc_state *state = &xin->recirc->state;
4817 if (xin->ofpacts_len > 0 || ctx.rule) {
4818 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
4820 VLOG_WARN_RL(&rl, "Recirculation conflict (%s)!",
4821 xin->ofpacts_len > 0
4827 /* Set the bridge for post-recirculation processing if needed. */
4828 if (ctx.xbridge->ofproto != state->ofproto) {
4829 struct xlate_cfg *xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
4830 const struct xbridge *new_bridge
4831 = xbridge_lookup(xcfg, state->ofproto);
4833 if (OVS_UNLIKELY(!new_bridge)) {
4834 /* Drop the packet if the bridge cannot be found. */
4835 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
4836 VLOG_WARN_RL(&rl, "Recirculation bridge no longer exists.");
4839 ctx.xbridge = new_bridge;
4842 /* Set the post-recirculation table id. Note: A table lookup is done
4843 * only if there are no post-recirculation actions. */
4844 ctx.table_id = state->table_id;
4846 /* Restore pipeline metadata. May change flow's in_port and other
4847 * metadata to the values that existed when recirculation was
4849 recirc_metadata_to_flow(&state->metadata, flow);
4851 /* Restore stack, if any. */
4853 ofpbuf_put(&ctx.stack, state->stack->data, state->stack->size);
4856 /* Restore action set, if any. */
4857 if (state->action_set_len) {
4858 const struct ofpact *a;
4860 ofpbuf_put(&ctx.action_set, state->ofpacts, state->action_set_len);
4862 OFPACT_FOR_EACH(a, state->ofpacts, state->action_set_len) {
4863 if (a->type == OFPACT_GROUP) {
4864 ctx.action_set_has_group = true;
4870 /* Restore recirculation actions. If there are no actions, processing
4871 * will start with a lookup in the table set above. */
4872 if (state->ofpacts_len > state->action_set_len) {
4873 xin->ofpacts_len = state->ofpacts_len - state->action_set_len;
4874 xin->ofpacts = state->ofpacts +
4875 state->action_set_len / sizeof *state->ofpacts;
4877 } else if (OVS_UNLIKELY(flow->recirc_id)) {
4878 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
4880 VLOG_WARN_RL(&rl, "Recirculation context not found for ID %"PRIx32,
4884 /* The bridge is now known so obtain its table version. */
4885 ctx.tables_version = ofproto_dpif_get_tables_version(ctx.xbridge->ofproto);
4887 if (!xin->ofpacts && !ctx.rule) {
4888 ctx.rule = rule_dpif_lookup_from_table(
4889 ctx.xbridge->ofproto, ctx.tables_version, flow, xin->wc,
4890 ctx.xin->xcache != NULL, ctx.xin->resubmit_stats, &ctx.table_id,
4891 flow->in_port.ofp_port, true, true);
4892 if (ctx.xin->resubmit_stats) {
4893 rule_dpif_credit_stats(ctx.rule, ctx.xin->resubmit_stats);
4895 if (ctx.xin->xcache) {
4896 struct xc_entry *entry;
4898 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_RULE);
4899 entry->u.rule = ctx.rule;
4902 if (OVS_UNLIKELY(ctx.xin->resubmit_hook)) {
4903 ctx.xin->resubmit_hook(ctx.xin, ctx.rule, 0);
4906 xout->fail_open = ctx.rule && rule_dpif_is_fail_open(ctx.rule);
4908 /* Get the proximate input port of the packet. (If xin->recirc,
4909 * flow->in_port is the ultimate input port of the packet.) */
4910 struct xport *in_port = get_ofp_port(xbridge,
4911 ctx.base_flow.in_port.ofp_port);
4913 /* Tunnel stats only for non-recirculated packets. */
4914 if (!xin->recirc && in_port && in_port->is_tunnel) {
4915 if (ctx.xin->resubmit_stats) {
4916 netdev_vport_inc_rx(in_port->netdev, ctx.xin->resubmit_stats);
4918 bfd_account_rx(in_port->bfd, ctx.xin->resubmit_stats);
4921 if (ctx.xin->xcache) {
4922 struct xc_entry *entry;
4924 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_NETDEV);
4925 entry->u.dev.rx = netdev_ref(in_port->netdev);
4926 entry->u.dev.bfd = bfd_ref(in_port->bfd);
4930 if (!xin->recirc && process_special(&ctx, in_port)) {
4931 /* process_special() did all the processing for this packet.
4933 * We do not perform special processing on recirculated packets, as
4934 * recirculated packets are not really received by the bridge.*/
4935 } else if (in_port && in_port->xbundle
4936 && xbundle_mirror_out(xbridge, in_port->xbundle)) {
4937 if (ctx.xin->packet != NULL) {
4938 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
4939 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
4940 "%s, which is reserved exclusively for mirroring",
4941 ctx.xbridge->name, in_port->xbundle->name);
4944 /* Sampling is done only for packets really received by the bridge. */
4945 unsigned int user_cookie_offset = 0;
4947 user_cookie_offset = compose_sflow_action(&ctx);
4948 compose_ipfix_action(&ctx, ODPP_NONE);
4950 size_t sample_actions_len = ctx.odp_actions->size;
4952 if (tnl_process_ecn(flow)
4953 && (!in_port || may_receive(in_port, &ctx))) {
4954 const struct ofpact *ofpacts;
4958 ofpacts = xin->ofpacts;
4959 ofpacts_len = xin->ofpacts_len;
4960 } else if (ctx.rule) {
4961 const struct rule_actions *actions
4962 = rule_dpif_get_actions(ctx.rule);
4963 ofpacts = actions->ofpacts;
4964 ofpacts_len = actions->ofpacts_len;
4965 ctx.rule_cookie = rule_dpif_get_flow_cookie(ctx.rule);
4970 mirror_ingress_packet(&ctx);
4971 do_xlate_actions(ofpacts, ofpacts_len, &ctx);
4973 /* We've let OFPP_NORMAL and the learning action look at the
4974 * packet, so drop it now if forwarding is disabled. */
4975 if (in_port && (!xport_stp_forward_state(in_port) ||
4976 !xport_rstp_forward_state(in_port))) {
4977 /* Drop all actions added by do_xlate_actions() above. */
4978 ctx.odp_actions->size = sample_actions_len;
4980 /* Undo changes that may have been done for recirculation. */
4981 if (exit_recirculates(&ctx)) {
4982 ctx.action_set.size = ctx.recirc_action_offset;
4983 ctx.recirc_action_offset = -1;
4984 ctx.last_unroll_offset = -1;
4986 } else if (ctx.action_set.size) {
4987 /* Translate action set only if not dropping the packet and
4988 * not recirculating. */
4989 if (!exit_recirculates(&ctx)) {
4990 xlate_action_set(&ctx);
4993 /* Check if need to recirculate. */
4994 if (exit_recirculates(&ctx)) {
4995 compose_recirculate_action(&ctx);
4999 /* Output only fully processed packets. */
5000 if (!exit_recirculates(&ctx)
5001 && xbridge->has_in_band
5002 && in_band_must_output_to_local_port(flow)
5003 && !actions_output_to_local_port(&ctx)) {
5004 compose_output_action(&ctx, OFPP_LOCAL, NULL);
5007 if (user_cookie_offset) {
5008 fix_sflow_action(&ctx, user_cookie_offset);
5012 if (nl_attr_oversized(ctx.odp_actions->size)) {
5013 /* These datapath actions are too big for a Netlink attribute, so we
5014 * can't hand them to the kernel directly. dpif_execute() can execute
5015 * them one by one with help, so just mark the result as SLOW_ACTION to
5016 * prevent the flow from being installed. */
5017 COVERAGE_INC(xlate_actions_oversize);
5018 ctx.xout->slow |= SLOW_ACTION;
5019 } else if (too_many_output_actions(ctx.odp_actions)) {
5020 COVERAGE_INC(xlate_actions_too_many_output);
5021 ctx.xout->slow |= SLOW_ACTION;
5024 /* Do netflow only for packets really received by the bridge and not sent
5025 * to the controller. We consider packets sent to the controller to be
5026 * part of the control plane rather than the data plane. */
5027 if (!xin->recirc && xbridge->netflow && !(xout->slow & SLOW_CONTROLLER)) {
5028 if (ctx.xin->resubmit_stats) {
5029 netflow_flow_update(xbridge->netflow, flow,
5030 ctx.nf_output_iface,
5031 ctx.xin->resubmit_stats);
5033 if (ctx.xin->xcache) {
5034 struct xc_entry *entry;
5036 entry = xlate_cache_add_entry(ctx.xin->xcache, XC_NETFLOW);
5037 entry->u.nf.netflow = netflow_ref(xbridge->netflow);
5038 entry->u.nf.flow = xmemdup(flow, sizeof *flow);
5039 entry->u.nf.iface = ctx.nf_output_iface;
5044 xlate_wc_finish(&ctx);
5048 ofpbuf_uninit(&ctx.stack);
5049 ofpbuf_uninit(&ctx.action_set);
5050 ofpbuf_uninit(&scratch_actions);
5053 /* Sends 'packet' out 'ofport'.
5054 * May modify 'packet'.
5055 * Returns 0 if successful, otherwise a positive errno value. */
5057 xlate_send_packet(const struct ofport_dpif *ofport, struct dp_packet *packet)
5059 struct xlate_cfg *xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
5060 struct xport *xport;
5061 struct ofpact_output output;
5064 ofpact_init(&output.ofpact, OFPACT_OUTPUT, sizeof output);
5065 /* Use OFPP_NONE as the in_port to avoid special packet processing. */
5066 flow_extract(packet, &flow);
5067 flow.in_port.ofp_port = OFPP_NONE;
5069 xport = xport_lookup(xcfg, ofport);
5073 output.port = xport->ofp_port;
5076 return ofproto_dpif_execute_actions(xport->xbridge->ofproto, &flow, NULL,
5077 &output.ofpact, sizeof output,
5081 struct xlate_cache *
5082 xlate_cache_new(void)
5084 struct xlate_cache *xcache = xmalloc(sizeof *xcache);
5086 ofpbuf_init(&xcache->entries, 512);
5090 static struct xc_entry *
5091 xlate_cache_add_entry(struct xlate_cache *xcache, enum xc_type type)
5093 struct xc_entry *entry;
5095 entry = ofpbuf_put_zeros(&xcache->entries, sizeof *entry);
5102 xlate_cache_netdev(struct xc_entry *entry, const struct dpif_flow_stats *stats)
5104 if (entry->u.dev.tx) {
5105 netdev_vport_inc_tx(entry->u.dev.tx, stats);
5107 if (entry->u.dev.rx) {
5108 netdev_vport_inc_rx(entry->u.dev.rx, stats);
5110 if (entry->u.dev.bfd) {
5111 bfd_account_rx(entry->u.dev.bfd, stats);
5116 xlate_cache_normal(struct ofproto_dpif *ofproto, struct flow *flow, int vlan)
5118 struct xlate_cfg *xcfg = ovsrcu_get(struct xlate_cfg *, &xcfgp);
5119 struct xbridge *xbridge;
5120 struct xbundle *xbundle;
5121 struct flow_wildcards wc;
5123 xbridge = xbridge_lookup(xcfg, ofproto);
5128 xbundle = lookup_input_bundle(xbridge, flow->in_port.ofp_port, false,
5134 update_learning_table(xbridge, flow, &wc, vlan, xbundle);
5137 /* Push stats and perform side effects of flow translation. */
5139 xlate_push_stats(struct xlate_cache *xcache,
5140 const struct dpif_flow_stats *stats)
5142 struct xc_entry *entry;
5143 struct ofpbuf entries = xcache->entries;
5144 uint8_t dmac[ETH_ADDR_LEN];
5146 if (!stats->n_packets) {
5150 XC_ENTRY_FOR_EACH (entry, entries, xcache) {
5151 switch (entry->type) {
5153 rule_dpif_credit_stats(entry->u.rule, stats);
5156 bond_account(entry->u.bond.bond, entry->u.bond.flow,
5157 entry->u.bond.vid, stats->n_bytes);
5160 xlate_cache_netdev(entry, stats);
5163 netflow_flow_update(entry->u.nf.netflow, entry->u.nf.flow,
5164 entry->u.nf.iface, stats);
5167 mirror_update_stats(entry->u.mirror.mbridge,
5168 entry->u.mirror.mirrors,
5169 stats->n_packets, stats->n_bytes);
5172 ofproto_dpif_flow_mod(entry->u.learn.ofproto, entry->u.learn.fm);
5175 xlate_cache_normal(entry->u.normal.ofproto, entry->u.normal.flow,
5176 entry->u.normal.vlan);
5178 case XC_FIN_TIMEOUT:
5179 xlate_fin_timeout__(entry->u.fin.rule, stats->tcp_flags,
5180 entry->u.fin.idle, entry->u.fin.hard);
5183 group_dpif_credit_stats(entry->u.group.group, entry->u.group.bucket,
5187 /* Lookup arp to avoid arp timeout. */
5188 tnl_arp_lookup(entry->u.tnl_arp_cache.br_name, entry->u.tnl_arp_cache.d_ip, dmac);
5197 xlate_dev_unref(struct xc_entry *entry)
5199 if (entry->u.dev.tx) {
5200 netdev_close(entry->u.dev.tx);
5202 if (entry->u.dev.rx) {
5203 netdev_close(entry->u.dev.rx);
5205 if (entry->u.dev.bfd) {
5206 bfd_unref(entry->u.dev.bfd);
5211 xlate_cache_clear_netflow(struct netflow *netflow, struct flow *flow)
5213 netflow_flow_clear(netflow, flow);
5214 netflow_unref(netflow);
5219 xlate_cache_clear(struct xlate_cache *xcache)
5221 struct xc_entry *entry;
5222 struct ofpbuf entries;
5228 XC_ENTRY_FOR_EACH (entry, entries, xcache) {
5229 switch (entry->type) {
5231 rule_dpif_unref(entry->u.rule);
5234 free(entry->u.bond.flow);
5235 bond_unref(entry->u.bond.bond);
5238 xlate_dev_unref(entry);
5241 xlate_cache_clear_netflow(entry->u.nf.netflow, entry->u.nf.flow);
5244 mbridge_unref(entry->u.mirror.mbridge);
5247 free(entry->u.learn.fm);
5248 ofpbuf_delete(entry->u.learn.ofpacts);
5251 free(entry->u.normal.flow);
5253 case XC_FIN_TIMEOUT:
5254 /* 'u.fin.rule' is always already held as a XC_RULE, which
5255 * has already released it's reference above. */
5258 group_dpif_unref(entry->u.group.group);
5267 ofpbuf_clear(&xcache->entries);
5271 xlate_cache_delete(struct xlate_cache *xcache)
5273 xlate_cache_clear(xcache);
5274 ofpbuf_uninit(&xcache->entries);