1 /* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License. */
17 #include "ofproto/ofproto-dpif-xlate.h"
25 #include "byte-order.h"
30 #include "dynamic-string.h"
35 #include "mac-learning.h"
36 #include "mcast-snooping.h"
37 #include "meta-flow.h"
38 #include "multipath.h"
39 #include "netdev-vport.h"
42 #include "odp-execute.h"
43 #include "ofp-actions.h"
44 #include "ofproto/ofproto-dpif-ipfix.h"
45 #include "ofproto/ofproto-dpif-mirror.h"
46 #include "ofproto/ofproto-dpif-monitor.h"
47 #include "ofproto/ofproto-dpif-sflow.h"
48 #include "ofproto/ofproto-dpif.h"
49 #include "ofproto/ofproto-provider.h"
50 #include "packet-dpif.h"
54 COVERAGE_DEFINE(xlate_actions
);
55 COVERAGE_DEFINE(xlate_actions_oversize
);
56 COVERAGE_DEFINE(xlate_actions_mpls_overflow
);
58 VLOG_DEFINE_THIS_MODULE(ofproto_dpif_xlate
);
60 /* Maximum depth of flow table recursion (due to resubmit actions) in a
61 * flow translation. */
62 #define MAX_RESUBMIT_RECURSION 64
63 #define MAX_INTERNAL_RESUBMITS 1 /* Max resbmits allowed using rules in
66 /* Timeout for internal rules created to handle recirculation */
67 #define RECIRC_TIMEOUT 60
69 /* Maximum number of resubmit actions in a flow translation, whether they are
70 * recursive or not. */
71 #define MAX_RESUBMITS (MAX_RESUBMIT_RECURSION * MAX_RESUBMIT_RECURSION)
74 struct hmap_node hmap_node
; /* Node in global 'xbridges' map. */
75 struct ofproto_dpif
*ofproto
; /* Key in global 'xbridges' map. */
77 struct list xbundles
; /* Owned xbundles. */
78 struct hmap xports
; /* Indexed by ofp_port. */
80 char *name
; /* Name used in log messages. */
81 struct dpif
*dpif
; /* Datapath interface. */
82 struct mac_learning
*ml
; /* Mac learning handle. */
83 struct mcast_snooping
*ms
; /* Multicast Snooping handle. */
84 struct mbridge
*mbridge
; /* Mirroring. */
85 struct dpif_sflow
*sflow
; /* SFlow handle, or null. */
86 struct dpif_ipfix
*ipfix
; /* Ipfix handle, or null. */
87 struct netflow
*netflow
; /* Netflow handle, or null. */
88 struct stp
*stp
; /* STP or null if disabled. */
90 /* Special rules installed by ofproto-dpif. */
91 struct rule_dpif
*miss_rule
;
92 struct rule_dpif
*no_packet_in_rule
;
94 enum ofp_config_flags frag
; /* Fragmentation handling. */
95 bool has_in_band
; /* Bridge has in band control? */
96 bool forward_bpdu
; /* Bridge forwards STP BPDUs? */
98 /* True if the datapath supports recirculation. */
101 /* True if the datapath supports variable-length
102 * OVS_USERSPACE_ATTR_USERDATA in OVS_ACTION_ATTR_USERSPACE actions.
103 * False if the datapath supports only 8-byte (or shorter) userdata. */
104 bool variable_length_userdata
;
106 /* Number of MPLS label stack entries that the datapath supports
108 size_t max_mpls_depth
;
112 struct hmap_node hmap_node
; /* In global 'xbundles' map. */
113 struct ofbundle
*ofbundle
; /* Key in global 'xbundles' map. */
115 struct list list_node
; /* In parent 'xbridges' list. */
116 struct xbridge
*xbridge
; /* Parent xbridge. */
118 struct list xports
; /* Contains "struct xport"s. */
120 char *name
; /* Name used in log messages. */
121 struct bond
*bond
; /* Nonnull iff more than one port. */
122 struct lacp
*lacp
; /* LACP handle or null. */
124 enum port_vlan_mode vlan_mode
; /* VLAN mode. */
125 int vlan
; /* -1=trunk port, else a 12-bit VLAN ID. */
126 unsigned long *trunks
; /* Bitmap of trunked VLANs, if 'vlan' == -1.
127 * NULL if all VLANs are trunked. */
128 bool use_priority_tags
; /* Use 802.1p tag for frames in VLAN 0? */
129 bool floodable
; /* No port has OFPUTIL_PC_NO_FLOOD set? */
133 struct hmap_node hmap_node
; /* Node in global 'xports' map. */
134 struct ofport_dpif
*ofport
; /* Key in global 'xports map. */
136 struct hmap_node ofp_node
; /* Node in parent xbridge 'xports' map. */
137 ofp_port_t ofp_port
; /* Key in parent xbridge 'xports' map. */
139 odp_port_t odp_port
; /* Datapath port number or ODPP_NONE. */
141 struct list bundle_node
; /* In parent xbundle (if it exists). */
142 struct xbundle
*xbundle
; /* Parent xbundle or null. */
144 struct netdev
*netdev
; /* 'ofport''s netdev. */
146 struct xbridge
*xbridge
; /* Parent bridge. */
147 struct xport
*peer
; /* Patch port peer or null. */
149 enum ofputil_port_config config
; /* OpenFlow port configuration. */
150 enum ofputil_port_state state
; /* OpenFlow port state. */
151 int stp_port_no
; /* STP port number or -1 if not in use. */
153 struct hmap skb_priorities
; /* Map of 'skb_priority_to_dscp's. */
155 bool may_enable
; /* May be enabled in bonds. */
156 bool is_tunnel
; /* Is a tunnel port. */
158 struct cfm
*cfm
; /* CFM handle or null. */
159 struct bfd
*bfd
; /* BFD handle or null. */
163 struct xlate_in
*xin
;
164 struct xlate_out
*xout
;
166 const struct xbridge
*xbridge
;
168 /* Flow at the last commit. */
169 struct flow base_flow
;
171 /* Tunnel IP destination address as received. This is stored separately
172 * as the base_flow.tunnel is cleared on init to reflect the datapath
173 * behavior. Used to make sure not to send tunneled output to ourselves,
174 * which might lead to an infinite loop. This could happen easily
175 * if a tunnel is marked as 'ip_remote=flow', and the flow does not
176 * actually set the tun_dst field. */
177 ovs_be32 orig_tunnel_ip_dst
;
179 /* Stack for the push and pop actions. Each stack element is of type
180 * "union mf_subvalue". */
181 union mf_subvalue init_stack
[1024 / sizeof(union mf_subvalue
)];
184 /* The rule that we are currently translating, or NULL. */
185 struct rule_dpif
*rule
;
187 /* Resubmit statistics, via xlate_table_action(). */
188 int recurse
; /* Current resubmit nesting depth. */
189 int resubmits
; /* Total number of resubmits. */
190 bool in_group
; /* Currently translating ofgroup, if true. */
192 uint32_t orig_skb_priority
; /* Priority when packet arrived. */
193 uint8_t table_id
; /* OpenFlow table ID where flow was found. */
194 uint32_t sflow_n_outputs
; /* Number of output ports. */
195 odp_port_t sflow_odp_port
; /* Output port for composing sFlow action. */
196 uint16_t user_cookie_offset
;/* Used for user_action_cookie fixup. */
197 bool exit
; /* No further actions should be processed. */
199 bool use_recirc
; /* Should generate recirc? */
200 struct xlate_recirc recirc
; /* Information used for generating
201 * recirculation actions */
203 /* True if a packet was but is no longer MPLS (due to an MPLS pop action).
204 * This is a trigger for recirculation in cases where translating an action
205 * or looking up a flow requires access to the fields of the packet after
206 * the MPLS label stack that was originally present. */
209 /* OpenFlow 1.1+ action set.
211 * 'action_set' accumulates "struct ofpact"s added by OFPACT_WRITE_ACTIONS.
212 * When translation is otherwise complete, ofpacts_execute_action_set()
213 * converts it to a set of "struct ofpact"s that can be translated into
214 * datapath actions. */
215 struct ofpbuf action_set
; /* Action set. */
216 uint64_t action_set_stub
[1024 / 8];
219 /* A controller may use OFPP_NONE as the ingress port to indicate that
220 * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for
221 * when an input bundle is needed for validation (e.g., mirroring or
222 * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have
223 * any 'port' structs, so care must be taken when dealing with it. */
224 static struct xbundle ofpp_none_bundle
= {
226 .vlan_mode
= PORT_VLAN_TRUNK
229 /* Node in 'xport''s 'skb_priorities' map. Used to maintain a map from
230 * 'priority' (the datapath's term for QoS queue) to the dscp bits which all
231 * traffic egressing the 'ofport' with that priority should be marked with. */
232 struct skb_priority_to_dscp
{
233 struct hmap_node hmap_node
; /* Node in 'ofport_dpif''s 'skb_priorities'. */
234 uint32_t skb_priority
; /* Priority of this queue (see struct flow). */
236 uint8_t dscp
; /* DSCP bits to mark outgoing traffic with. */
251 /* xlate_cache entries hold enough information to perform the side effects of
252 * xlate_actions() for a rule, without needing to perform rule translation
253 * from scratch. The primary usage of these is to submit statistics to objects
254 * that a flow relates to, although they may be used for other effects as well
255 * (for instance, refreshing hard timeouts for learned flows). */
259 struct rule_dpif
*rule
;
266 struct netflow
*netflow
;
271 struct mbridge
*mbridge
;
272 mirror_mask_t mirrors
;
280 struct ofproto_dpif
*ofproto
;
281 struct ofputil_flow_mod
*fm
;
282 struct ofpbuf
*ofpacts
;
285 struct ofproto_dpif
*ofproto
;
290 struct rule_dpif
*rule
;
295 struct group_dpif
*group
;
296 struct ofputil_bucket
*bucket
;
301 #define XC_ENTRY_FOR_EACH(entry, entries, xcache) \
302 entries = xcache->entries; \
303 for (entry = ofpbuf_try_pull(&entries, sizeof *entry); \
305 entry = ofpbuf_try_pull(&entries, sizeof *entry))
308 struct ofpbuf entries
;
311 /* Xlate config contains hash maps of all bridges, bundles and ports.
312 * Xcfgp contains the pointer to the current xlate configuration.
313 * When the main thread needs to change the configuration, it copies xcfgp to
314 * new_xcfg and edits new_xcfg. This enables the use of RCU locking which
315 * does not block handler and revalidator threads. */
317 struct hmap xbridges
;
318 struct hmap xbundles
;
321 static OVSRCU_TYPE(struct xlate_cfg
*) xcfgp
= OVSRCU_TYPE_INITIALIZER
;
322 static struct xlate_cfg
*new_xcfg
= NULL
;
324 static bool may_receive(const struct xport
*, struct xlate_ctx
*);
325 static void do_xlate_actions(const struct ofpact
*, size_t ofpacts_len
,
327 static void xlate_normal(struct xlate_ctx
*);
328 static void xlate_report(struct xlate_ctx
*, const char *);
329 static void xlate_table_action(struct xlate_ctx
*, ofp_port_t in_port
,
330 uint8_t table_id
, bool may_packet_in
,
331 bool honor_table_miss
);
332 static bool input_vid_is_valid(uint16_t vid
, struct xbundle
*, bool warn
);
333 static uint16_t input_vid_to_vlan(const struct xbundle
*, uint16_t vid
);
334 static void output_normal(struct xlate_ctx
*, const struct xbundle
*,
336 static void compose_output_action(struct xlate_ctx
*, ofp_port_t ofp_port
);
338 static struct xbridge
*xbridge_lookup(struct xlate_cfg
*,
339 const struct ofproto_dpif
*);
340 static struct xbundle
*xbundle_lookup(struct xlate_cfg
*,
341 const struct ofbundle
*);
342 static struct xport
*xport_lookup(struct xlate_cfg
*,
343 const struct ofport_dpif
*);
344 static struct xport
*get_ofp_port(const struct xbridge
*, ofp_port_t ofp_port
);
345 static struct skb_priority_to_dscp
*get_skb_priority(const struct xport
*,
346 uint32_t skb_priority
);
347 static void clear_skb_priorities(struct xport
*);
348 static bool dscp_from_skb_priority(const struct xport
*, uint32_t skb_priority
,
351 static struct xc_entry
*xlate_cache_add_entry(struct xlate_cache
*xc
,
353 static void xlate_xbridge_init(struct xlate_cfg
*, struct xbridge
*);
354 static void xlate_xbundle_init(struct xlate_cfg
*, struct xbundle
*);
355 static void xlate_xport_init(struct xlate_cfg
*, struct xport
*);
356 static void xlate_xbridge_set(struct xbridge
*xbridge
,
358 struct rule_dpif
*miss_rule
,
359 struct rule_dpif
*no_packet_in_rule
,
360 const struct mac_learning
*ml
, struct stp
*stp
,
361 const struct mcast_snooping
*ms
,
362 const struct mbridge
*mbridge
,
363 const struct dpif_sflow
*sflow
,
364 const struct dpif_ipfix
*ipfix
,
365 const struct netflow
*netflow
,
366 enum ofp_config_flags frag
,
367 bool forward_bpdu
, bool has_in_band
,
369 bool variable_length_userdata
,
370 size_t max_mpls_depth
);
371 static void xlate_xbundle_set(struct xbundle
*xbundle
,
372 enum port_vlan_mode vlan_mode
, int vlan
,
373 unsigned long *trunks
, bool use_priority_tags
,
374 const struct bond
*bond
, const struct lacp
*lacp
,
376 static void xlate_xport_set(struct xport
*xport
, odp_port_t odp_port
,
377 const struct netdev
*netdev
, const struct cfm
*cfm
,
378 const struct bfd
*bfd
, int stp_port_no
,
379 enum ofputil_port_config config
,
380 enum ofputil_port_state state
, bool is_tunnel
,
382 static void xlate_xbridge_remove(struct xlate_cfg
*, struct xbridge
*);
383 static void xlate_xbundle_remove(struct xlate_cfg
*, struct xbundle
*);
384 static void xlate_xport_remove(struct xlate_cfg
*, struct xport
*);
385 static void xlate_xbridge_copy(struct xbridge
*);
386 static void xlate_xbundle_copy(struct xbridge
*, struct xbundle
*);
387 static void xlate_xport_copy(struct xbridge
*, struct xbundle
*,
389 static void xlate_xcfg_free(struct xlate_cfg
*);
393 xlate_xbridge_init(struct xlate_cfg
*xcfg
, struct xbridge
*xbridge
)
395 list_init(&xbridge
->xbundles
);
396 hmap_init(&xbridge
->xports
);
397 hmap_insert(&xcfg
->xbridges
, &xbridge
->hmap_node
,
398 hash_pointer(xbridge
->ofproto
, 0));
402 xlate_xbundle_init(struct xlate_cfg
*xcfg
, struct xbundle
*xbundle
)
404 list_init(&xbundle
->xports
);
405 list_insert(&xbundle
->xbridge
->xbundles
, &xbundle
->list_node
);
406 hmap_insert(&xcfg
->xbundles
, &xbundle
->hmap_node
,
407 hash_pointer(xbundle
->ofbundle
, 0));
411 xlate_xport_init(struct xlate_cfg
*xcfg
, struct xport
*xport
)
413 hmap_init(&xport
->skb_priorities
);
414 hmap_insert(&xcfg
->xports
, &xport
->hmap_node
,
415 hash_pointer(xport
->ofport
, 0));
416 hmap_insert(&xport
->xbridge
->xports
, &xport
->ofp_node
,
417 hash_ofp_port(xport
->ofp_port
));
421 xlate_xbridge_set(struct xbridge
*xbridge
,
423 struct rule_dpif
*miss_rule
,
424 struct rule_dpif
*no_packet_in_rule
,
425 const struct mac_learning
*ml
, struct stp
*stp
,
426 const struct mcast_snooping
*ms
,
427 const struct mbridge
*mbridge
,
428 const struct dpif_sflow
*sflow
,
429 const struct dpif_ipfix
*ipfix
,
430 const struct netflow
*netflow
, enum ofp_config_flags frag
,
431 bool forward_bpdu
, bool has_in_band
,
433 bool variable_length_userdata
,
434 size_t max_mpls_depth
)
436 if (xbridge
->ml
!= ml
) {
437 mac_learning_unref(xbridge
->ml
);
438 xbridge
->ml
= mac_learning_ref(ml
);
441 if (xbridge
->ms
!= ms
) {
442 mcast_snooping_unref(xbridge
->ms
);
443 xbridge
->ms
= mcast_snooping_ref(ms
);
446 if (xbridge
->mbridge
!= mbridge
) {
447 mbridge_unref(xbridge
->mbridge
);
448 xbridge
->mbridge
= mbridge_ref(mbridge
);
451 if (xbridge
->sflow
!= sflow
) {
452 dpif_sflow_unref(xbridge
->sflow
);
453 xbridge
->sflow
= dpif_sflow_ref(sflow
);
456 if (xbridge
->ipfix
!= ipfix
) {
457 dpif_ipfix_unref(xbridge
->ipfix
);
458 xbridge
->ipfix
= dpif_ipfix_ref(ipfix
);
461 if (xbridge
->stp
!= stp
) {
462 stp_unref(xbridge
->stp
);
463 xbridge
->stp
= stp_ref(stp
);
466 if (xbridge
->netflow
!= netflow
) {
467 netflow_unref(xbridge
->netflow
);
468 xbridge
->netflow
= netflow_ref(netflow
);
471 xbridge
->dpif
= dpif
;
472 xbridge
->forward_bpdu
= forward_bpdu
;
473 xbridge
->has_in_band
= has_in_band
;
474 xbridge
->frag
= frag
;
475 xbridge
->miss_rule
= miss_rule
;
476 xbridge
->no_packet_in_rule
= no_packet_in_rule
;
477 xbridge
->enable_recirc
= enable_recirc
;
478 xbridge
->variable_length_userdata
= variable_length_userdata
;
479 xbridge
->max_mpls_depth
= max_mpls_depth
;
483 xlate_xbundle_set(struct xbundle
*xbundle
,
484 enum port_vlan_mode vlan_mode
, int vlan
,
485 unsigned long *trunks
, bool use_priority_tags
,
486 const struct bond
*bond
, const struct lacp
*lacp
,
489 ovs_assert(xbundle
->xbridge
);
491 xbundle
->vlan_mode
= vlan_mode
;
492 xbundle
->vlan
= vlan
;
493 xbundle
->trunks
= trunks
;
494 xbundle
->use_priority_tags
= use_priority_tags
;
495 xbundle
->floodable
= floodable
;
497 if (xbundle
->bond
!= bond
) {
498 bond_unref(xbundle
->bond
);
499 xbundle
->bond
= bond_ref(bond
);
502 if (xbundle
->lacp
!= lacp
) {
503 lacp_unref(xbundle
->lacp
);
504 xbundle
->lacp
= lacp_ref(lacp
);
509 xlate_xport_set(struct xport
*xport
, odp_port_t odp_port
,
510 const struct netdev
*netdev
, const struct cfm
*cfm
,
511 const struct bfd
*bfd
, int stp_port_no
,
512 enum ofputil_port_config config
, enum ofputil_port_state state
,
513 bool is_tunnel
, bool may_enable
)
515 xport
->config
= config
;
516 xport
->state
= state
;
517 xport
->stp_port_no
= stp_port_no
;
518 xport
->is_tunnel
= is_tunnel
;
519 xport
->may_enable
= may_enable
;
520 xport
->odp_port
= odp_port
;
522 if (xport
->cfm
!= cfm
) {
523 cfm_unref(xport
->cfm
);
524 xport
->cfm
= cfm_ref(cfm
);
527 if (xport
->bfd
!= bfd
) {
528 bfd_unref(xport
->bfd
);
529 xport
->bfd
= bfd_ref(bfd
);
532 if (xport
->netdev
!= netdev
) {
533 netdev_close(xport
->netdev
);
534 xport
->netdev
= netdev_ref(netdev
);
539 xlate_xbridge_copy(struct xbridge
*xbridge
)
541 struct xbundle
*xbundle
;
543 struct xbridge
*new_xbridge
= xzalloc(sizeof *xbridge
);
544 new_xbridge
->ofproto
= xbridge
->ofproto
;
545 new_xbridge
->name
= xstrdup(xbridge
->name
);
546 xlate_xbridge_init(new_xcfg
, new_xbridge
);
548 xlate_xbridge_set(new_xbridge
,
549 xbridge
->dpif
, xbridge
->miss_rule
,
550 xbridge
->no_packet_in_rule
, xbridge
->ml
, xbridge
->stp
,
551 xbridge
->ms
, xbridge
->mbridge
, xbridge
->sflow
,
552 xbridge
->ipfix
, xbridge
->netflow
, xbridge
->frag
,
553 xbridge
->forward_bpdu
, xbridge
->has_in_band
,
554 xbridge
->enable_recirc
, xbridge
->variable_length_userdata
,
555 xbridge
->max_mpls_depth
);
556 LIST_FOR_EACH (xbundle
, list_node
, &xbridge
->xbundles
) {
557 xlate_xbundle_copy(new_xbridge
, xbundle
);
560 /* Copy xports which are not part of a xbundle */
561 HMAP_FOR_EACH (xport
, ofp_node
, &xbridge
->xports
) {
562 if (!xport
->xbundle
) {
563 xlate_xport_copy(new_xbridge
, NULL
, xport
);
569 xlate_xbundle_copy(struct xbridge
*xbridge
, struct xbundle
*xbundle
)
572 struct xbundle
*new_xbundle
= xzalloc(sizeof *xbundle
);
573 new_xbundle
->ofbundle
= xbundle
->ofbundle
;
574 new_xbundle
->xbridge
= xbridge
;
575 new_xbundle
->name
= xstrdup(xbundle
->name
);
576 xlate_xbundle_init(new_xcfg
, new_xbundle
);
578 xlate_xbundle_set(new_xbundle
, xbundle
->vlan_mode
,
579 xbundle
->vlan
, xbundle
->trunks
,
580 xbundle
->use_priority_tags
, xbundle
->bond
, xbundle
->lacp
,
582 LIST_FOR_EACH (xport
, bundle_node
, &xbundle
->xports
) {
583 xlate_xport_copy(xbridge
, new_xbundle
, xport
);
588 xlate_xport_copy(struct xbridge
*xbridge
, struct xbundle
*xbundle
,
591 struct skb_priority_to_dscp
*pdscp
, *new_pdscp
;
592 struct xport
*new_xport
= xzalloc(sizeof *xport
);
593 new_xport
->ofport
= xport
->ofport
;
594 new_xport
->ofp_port
= xport
->ofp_port
;
595 new_xport
->xbridge
= xbridge
;
596 xlate_xport_init(new_xcfg
, new_xport
);
598 xlate_xport_set(new_xport
, xport
->odp_port
, xport
->netdev
, xport
->cfm
,
599 xport
->bfd
, xport
->stp_port_no
, xport
->config
, xport
->state
,
600 xport
->is_tunnel
, xport
->may_enable
);
603 struct xport
*peer
= xport_lookup(new_xcfg
, xport
->peer
->ofport
);
605 new_xport
->peer
= peer
;
606 new_xport
->peer
->peer
= new_xport
;
611 new_xport
->xbundle
= xbundle
;
612 list_insert(&new_xport
->xbundle
->xports
, &new_xport
->bundle_node
);
615 HMAP_FOR_EACH (pdscp
, hmap_node
, &xport
->skb_priorities
) {
616 new_pdscp
= xmalloc(sizeof *pdscp
);
617 new_pdscp
->skb_priority
= pdscp
->skb_priority
;
618 new_pdscp
->dscp
= pdscp
->dscp
;
619 hmap_insert(&new_xport
->skb_priorities
, &new_pdscp
->hmap_node
,
620 hash_int(new_pdscp
->skb_priority
, 0));
624 /* Sets the current xlate configuration to new_xcfg and frees the old xlate
625 * configuration in xcfgp.
627 * This needs to be called after editing the xlate configuration.
629 * Functions that edit the new xlate configuration are
630 * xlate_<ofport/bundle/ofport>_set and xlate_<ofport/bundle/ofport>_remove.
636 * edit_xlate_configuration();
638 * xlate_txn_commit(); */
640 xlate_txn_commit(void)
642 struct xlate_cfg
*xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
644 ovsrcu_set(&xcfgp
, new_xcfg
);
645 ovsrcu_postpone(xlate_xcfg_free
, xcfg
);
650 /* Copies the current xlate configuration in xcfgp to new_xcfg.
652 * This needs to be called prior to editing the xlate configuration. */
654 xlate_txn_start(void)
656 struct xbridge
*xbridge
;
657 struct xlate_cfg
*xcfg
;
659 ovs_assert(!new_xcfg
);
661 new_xcfg
= xmalloc(sizeof *new_xcfg
);
662 hmap_init(&new_xcfg
->xbridges
);
663 hmap_init(&new_xcfg
->xbundles
);
664 hmap_init(&new_xcfg
->xports
);
666 xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
671 HMAP_FOR_EACH (xbridge
, hmap_node
, &xcfg
->xbridges
) {
672 xlate_xbridge_copy(xbridge
);
678 xlate_xcfg_free(struct xlate_cfg
*xcfg
)
680 struct xbridge
*xbridge
, *next_xbridge
;
686 HMAP_FOR_EACH_SAFE (xbridge
, next_xbridge
, hmap_node
, &xcfg
->xbridges
) {
687 xlate_xbridge_remove(xcfg
, xbridge
);
690 hmap_destroy(&xcfg
->xbridges
);
691 hmap_destroy(&xcfg
->xbundles
);
692 hmap_destroy(&xcfg
->xports
);
697 xlate_ofproto_set(struct ofproto_dpif
*ofproto
, const char *name
,
698 struct dpif
*dpif
, struct rule_dpif
*miss_rule
,
699 struct rule_dpif
*no_packet_in_rule
,
700 const struct mac_learning
*ml
, struct stp
*stp
,
701 const struct mcast_snooping
*ms
,
702 const struct mbridge
*mbridge
,
703 const struct dpif_sflow
*sflow
,
704 const struct dpif_ipfix
*ipfix
,
705 const struct netflow
*netflow
, enum ofp_config_flags frag
,
706 bool forward_bpdu
, bool has_in_band
,
708 bool variable_length_userdata
,
709 size_t max_mpls_depth
)
711 struct xbridge
*xbridge
;
713 ovs_assert(new_xcfg
);
715 xbridge
= xbridge_lookup(new_xcfg
, ofproto
);
717 xbridge
= xzalloc(sizeof *xbridge
);
718 xbridge
->ofproto
= ofproto
;
720 xlate_xbridge_init(new_xcfg
, xbridge
);
724 xbridge
->name
= xstrdup(name
);
726 xlate_xbridge_set(xbridge
, dpif
, miss_rule
, no_packet_in_rule
, ml
, stp
,
727 ms
, mbridge
, sflow
, ipfix
, netflow
, frag
, forward_bpdu
,
728 has_in_band
, enable_recirc
, variable_length_userdata
,
733 xlate_xbridge_remove(struct xlate_cfg
*xcfg
, struct xbridge
*xbridge
)
735 struct xbundle
*xbundle
, *next_xbundle
;
736 struct xport
*xport
, *next_xport
;
742 HMAP_FOR_EACH_SAFE (xport
, next_xport
, ofp_node
, &xbridge
->xports
) {
743 xlate_xport_remove(xcfg
, xport
);
746 LIST_FOR_EACH_SAFE (xbundle
, next_xbundle
, list_node
, &xbridge
->xbundles
) {
747 xlate_xbundle_remove(xcfg
, xbundle
);
750 hmap_remove(&xcfg
->xbridges
, &xbridge
->hmap_node
);
751 mac_learning_unref(xbridge
->ml
);
752 mcast_snooping_unref(xbridge
->ms
);
753 mbridge_unref(xbridge
->mbridge
);
754 dpif_sflow_unref(xbridge
->sflow
);
755 dpif_ipfix_unref(xbridge
->ipfix
);
756 stp_unref(xbridge
->stp
);
757 hmap_destroy(&xbridge
->xports
);
763 xlate_remove_ofproto(struct ofproto_dpif
*ofproto
)
765 struct xbridge
*xbridge
;
767 ovs_assert(new_xcfg
);
769 xbridge
= xbridge_lookup(new_xcfg
, ofproto
);
770 xlate_xbridge_remove(new_xcfg
, xbridge
);
774 xlate_bundle_set(struct ofproto_dpif
*ofproto
, struct ofbundle
*ofbundle
,
775 const char *name
, enum port_vlan_mode vlan_mode
, int vlan
,
776 unsigned long *trunks
, bool use_priority_tags
,
777 const struct bond
*bond
, const struct lacp
*lacp
,
780 struct xbundle
*xbundle
;
782 ovs_assert(new_xcfg
);
784 xbundle
= xbundle_lookup(new_xcfg
, ofbundle
);
786 xbundle
= xzalloc(sizeof *xbundle
);
787 xbundle
->ofbundle
= ofbundle
;
788 xbundle
->xbridge
= xbridge_lookup(new_xcfg
, ofproto
);
790 xlate_xbundle_init(new_xcfg
, xbundle
);
794 xbundle
->name
= xstrdup(name
);
796 xlate_xbundle_set(xbundle
, vlan_mode
, vlan
, trunks
,
797 use_priority_tags
, bond
, lacp
, floodable
);
801 xlate_xbundle_remove(struct xlate_cfg
*xcfg
, struct xbundle
*xbundle
)
803 struct xport
*xport
, *next
;
809 LIST_FOR_EACH_SAFE (xport
, next
, bundle_node
, &xbundle
->xports
) {
810 list_remove(&xport
->bundle_node
);
811 xport
->xbundle
= NULL
;
814 hmap_remove(&xcfg
->xbundles
, &xbundle
->hmap_node
);
815 list_remove(&xbundle
->list_node
);
816 bond_unref(xbundle
->bond
);
817 lacp_unref(xbundle
->lacp
);
823 xlate_bundle_remove(struct ofbundle
*ofbundle
)
825 struct xbundle
*xbundle
;
827 ovs_assert(new_xcfg
);
829 xbundle
= xbundle_lookup(new_xcfg
, ofbundle
);
830 xlate_xbundle_remove(new_xcfg
, xbundle
);
834 xlate_ofport_set(struct ofproto_dpif
*ofproto
, struct ofbundle
*ofbundle
,
835 struct ofport_dpif
*ofport
, ofp_port_t ofp_port
,
836 odp_port_t odp_port
, const struct netdev
*netdev
,
837 const struct cfm
*cfm
, const struct bfd
*bfd
,
838 struct ofport_dpif
*peer
, int stp_port_no
,
839 const struct ofproto_port_queue
*qdscp_list
, size_t n_qdscp
,
840 enum ofputil_port_config config
,
841 enum ofputil_port_state state
, bool is_tunnel
,
847 ovs_assert(new_xcfg
);
849 xport
= xport_lookup(new_xcfg
, ofport
);
851 xport
= xzalloc(sizeof *xport
);
852 xport
->ofport
= ofport
;
853 xport
->xbridge
= xbridge_lookup(new_xcfg
, ofproto
);
854 xport
->ofp_port
= ofp_port
;
856 xlate_xport_init(new_xcfg
, xport
);
859 ovs_assert(xport
->ofp_port
== ofp_port
);
861 xlate_xport_set(xport
, odp_port
, netdev
, cfm
, bfd
, stp_port_no
, config
,
862 state
, is_tunnel
, may_enable
);
865 xport
->peer
->peer
= NULL
;
867 xport
->peer
= xport_lookup(new_xcfg
, peer
);
869 xport
->peer
->peer
= xport
;
872 if (xport
->xbundle
) {
873 list_remove(&xport
->bundle_node
);
875 xport
->xbundle
= xbundle_lookup(new_xcfg
, ofbundle
);
876 if (xport
->xbundle
) {
877 list_insert(&xport
->xbundle
->xports
, &xport
->bundle_node
);
880 clear_skb_priorities(xport
);
881 for (i
= 0; i
< n_qdscp
; i
++) {
882 struct skb_priority_to_dscp
*pdscp
;
883 uint32_t skb_priority
;
885 if (dpif_queue_to_priority(xport
->xbridge
->dpif
, qdscp_list
[i
].queue
,
890 pdscp
= xmalloc(sizeof *pdscp
);
891 pdscp
->skb_priority
= skb_priority
;
892 pdscp
->dscp
= (qdscp_list
[i
].dscp
<< 2) & IP_DSCP_MASK
;
893 hmap_insert(&xport
->skb_priorities
, &pdscp
->hmap_node
,
894 hash_int(pdscp
->skb_priority
, 0));
899 xlate_xport_remove(struct xlate_cfg
*xcfg
, struct xport
*xport
)
906 xport
->peer
->peer
= NULL
;
910 if (xport
->xbundle
) {
911 list_remove(&xport
->bundle_node
);
914 clear_skb_priorities(xport
);
915 hmap_destroy(&xport
->skb_priorities
);
917 hmap_remove(&xcfg
->xports
, &xport
->hmap_node
);
918 hmap_remove(&xport
->xbridge
->xports
, &xport
->ofp_node
);
920 netdev_close(xport
->netdev
);
921 cfm_unref(xport
->cfm
);
922 bfd_unref(xport
->bfd
);
927 xlate_ofport_remove(struct ofport_dpif
*ofport
)
931 ovs_assert(new_xcfg
);
933 xport
= xport_lookup(new_xcfg
, ofport
);
934 xlate_xport_remove(new_xcfg
, xport
);
937 /* Given a datapath and flow metadata ('backer', and 'flow' respectively)
938 * returns the corresponding struct xport, or NULL if none is found. */
939 static struct xport
*
940 xlate_lookup_xport(const struct dpif_backer
*backer
, const struct flow
*flow
)
942 struct xlate_cfg
*xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
944 return xport_lookup(xcfg
, tnl_port_should_receive(flow
)
945 ? tnl_port_receive(flow
)
946 : odp_port_to_ofport(backer
, flow
->in_port
.odp_port
));
949 static struct ofproto_dpif
*
950 xlate_lookup_ofproto_(const struct dpif_backer
*backer
, const struct flow
*flow
,
951 ofp_port_t
*ofp_in_port
, const struct xport
**xportp
)
953 const struct xport
*xport
;
955 *xportp
= xport
= xlate_lookup_xport(backer
, flow
);
959 *ofp_in_port
= xport
->ofp_port
;
961 return xport
->xbridge
->ofproto
;
967 /* Given a datapath and flow metadata ('backer', and 'flow' respectively)
968 * returns the corresponding struct ofproto_dpif and OpenFlow port number. */
969 struct ofproto_dpif
*
970 xlate_lookup_ofproto(const struct dpif_backer
*backer
, const struct flow
*flow
,
971 ofp_port_t
*ofp_in_port
)
973 const struct xport
*xport
;
975 return xlate_lookup_ofproto_(backer
, flow
, ofp_in_port
, &xport
);
978 /* Given a datapath and flow metadata ('backer', and 'flow' respectively),
979 * optionally populates 'ofproto' with the ofproto_dpif, 'ofp_in_port' with the
980 * openflow in_port, and 'ipfix', 'sflow', and 'netflow' with the appropriate
981 * handles for those protocols if they're enabled. Caller may use the returned
982 * pointers until quiescing, for longer term use additional references must
985 * '*ofp_in_port' is set to OFPP_NONE if 'flow''s in_port does not exist.
987 * Returns 0 if successful, ENODEV if the parsed flow has no associated ofport.
990 xlate_receive(const struct dpif_backer
*backer
, const struct flow
*flow
,
991 struct ofproto_dpif
**ofprotop
, struct dpif_ipfix
**ipfix
,
992 struct dpif_sflow
**sflow
, struct netflow
**netflow
,
993 ofp_port_t
*ofp_in_port
)
995 struct ofproto_dpif
*ofproto
;
996 const struct xport
*xport
;
998 ofproto
= xlate_lookup_ofproto_(backer
, flow
, ofp_in_port
, &xport
);
1000 if (ofp_in_port
&& !xport
) {
1001 *ofp_in_port
= OFPP_NONE
;
1009 *ofprotop
= ofproto
;
1013 *ipfix
= xport
->xbridge
->ipfix
;
1017 *sflow
= xport
->xbridge
->sflow
;
1021 *netflow
= xport
->xbridge
->netflow
;
1026 static struct xbridge
*
1027 xbridge_lookup(struct xlate_cfg
*xcfg
, const struct ofproto_dpif
*ofproto
)
1029 struct hmap
*xbridges
;
1030 struct xbridge
*xbridge
;
1032 if (!ofproto
|| !xcfg
) {
1036 xbridges
= &xcfg
->xbridges
;
1038 HMAP_FOR_EACH_IN_BUCKET (xbridge
, hmap_node
, hash_pointer(ofproto
, 0),
1040 if (xbridge
->ofproto
== ofproto
) {
1047 static struct xbundle
*
1048 xbundle_lookup(struct xlate_cfg
*xcfg
, const struct ofbundle
*ofbundle
)
1050 struct hmap
*xbundles
;
1051 struct xbundle
*xbundle
;
1053 if (!ofbundle
|| !xcfg
) {
1057 xbundles
= &xcfg
->xbundles
;
1059 HMAP_FOR_EACH_IN_BUCKET (xbundle
, hmap_node
, hash_pointer(ofbundle
, 0),
1061 if (xbundle
->ofbundle
== ofbundle
) {
1068 static struct xport
*
1069 xport_lookup(struct xlate_cfg
*xcfg
, const struct ofport_dpif
*ofport
)
1071 struct hmap
*xports
;
1072 struct xport
*xport
;
1074 if (!ofport
|| !xcfg
) {
1078 xports
= &xcfg
->xports
;
1080 HMAP_FOR_EACH_IN_BUCKET (xport
, hmap_node
, hash_pointer(ofport
, 0),
1082 if (xport
->ofport
== ofport
) {
1089 static struct stp_port
*
1090 xport_get_stp_port(const struct xport
*xport
)
1092 return xport
->xbridge
->stp
&& xport
->stp_port_no
!= -1
1093 ? stp_get_port(xport
->xbridge
->stp
, xport
->stp_port_no
)
1098 xport_stp_learn_state(const struct xport
*xport
)
1100 struct stp_port
*sp
= xport_get_stp_port(xport
);
1101 return stp_learn_in_state(sp
? stp_port_get_state(sp
) : STP_DISABLED
);
1105 xport_stp_forward_state(const struct xport
*xport
)
1107 struct stp_port
*sp
= xport_get_stp_port(xport
);
1108 return stp_forward_in_state(sp
? stp_port_get_state(sp
) : STP_DISABLED
);
1112 xport_stp_should_forward_bpdu(const struct xport
*xport
)
1114 struct stp_port
*sp
= xport_get_stp_port(xport
);
1115 return stp_should_forward_bpdu(sp
? stp_port_get_state(sp
) : STP_DISABLED
);
1118 /* Returns true if STP should process 'flow'. Sets fields in 'wc' that
1119 * were used to make the determination.*/
1121 stp_should_process_flow(const struct flow
*flow
, struct flow_wildcards
*wc
)
1123 /* is_stp() also checks dl_type, but dl_type is always set in 'wc'. */
1124 memset(&wc
->masks
.dl_dst
, 0xff, sizeof wc
->masks
.dl_dst
);
1125 return is_stp(flow
);
1129 stp_process_packet(const struct xport
*xport
, const struct ofpbuf
*packet
)
1131 struct stp_port
*sp
= xport_get_stp_port(xport
);
1132 struct ofpbuf payload
= *packet
;
1133 struct eth_header
*eth
= ofpbuf_data(&payload
);
1135 /* Sink packets on ports that have STP disabled when the bridge has
1137 if (!sp
|| stp_port_get_state(sp
) == STP_DISABLED
) {
1141 /* Trim off padding on payload. */
1142 if (ofpbuf_size(&payload
) > ntohs(eth
->eth_type
) + ETH_HEADER_LEN
) {
1143 ofpbuf_set_size(&payload
, ntohs(eth
->eth_type
) + ETH_HEADER_LEN
);
1146 if (ofpbuf_try_pull(&payload
, ETH_HEADER_LEN
+ LLC_HEADER_LEN
)) {
1147 stp_received_bpdu(sp
, ofpbuf_data(&payload
), ofpbuf_size(&payload
));
1151 static struct xport
*
1152 get_ofp_port(const struct xbridge
*xbridge
, ofp_port_t ofp_port
)
1154 struct xport
*xport
;
1156 HMAP_FOR_EACH_IN_BUCKET (xport
, ofp_node
, hash_ofp_port(ofp_port
),
1158 if (xport
->ofp_port
== ofp_port
) {
1166 ofp_port_to_odp_port(const struct xbridge
*xbridge
, ofp_port_t ofp_port
)
1168 const struct xport
*xport
= get_ofp_port(xbridge
, ofp_port
);
1169 return xport
? xport
->odp_port
: ODPP_NONE
;
1173 odp_port_is_alive(const struct xlate_ctx
*ctx
, ofp_port_t ofp_port
)
1175 struct xport
*xport
;
1177 xport
= get_ofp_port(ctx
->xbridge
, ofp_port
);
1178 if (!xport
|| xport
->config
& OFPUTIL_PC_PORT_DOWN
||
1179 xport
->state
& OFPUTIL_PS_LINK_DOWN
) {
1186 static struct ofputil_bucket
*
1187 group_first_live_bucket(const struct xlate_ctx
*, const struct group_dpif
*,
1191 group_is_alive(const struct xlate_ctx
*ctx
, uint32_t group_id
, int depth
)
1193 struct group_dpif
*group
;
1195 if (group_dpif_lookup(ctx
->xbridge
->ofproto
, group_id
, &group
)) {
1196 struct ofputil_bucket
*bucket
;
1198 bucket
= group_first_live_bucket(ctx
, group
, depth
);
1199 group_dpif_unref(group
);
1200 return bucket
== NULL
;
1206 #define MAX_LIVENESS_RECURSION 128 /* Arbitrary limit */
1209 bucket_is_alive(const struct xlate_ctx
*ctx
,
1210 struct ofputil_bucket
*bucket
, int depth
)
1212 if (depth
>= MAX_LIVENESS_RECURSION
) {
1213 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 1);
1215 VLOG_WARN_RL(&rl
, "bucket chaining exceeded %d links",
1216 MAX_LIVENESS_RECURSION
);
1220 return (!ofputil_bucket_has_liveness(bucket
)
1221 || (bucket
->watch_port
!= OFPP_ANY
1222 && odp_port_is_alive(ctx
, bucket
->watch_port
))
1223 || (bucket
->watch_group
!= OFPG_ANY
1224 && group_is_alive(ctx
, bucket
->watch_group
, depth
+ 1)));
1227 static struct ofputil_bucket
*
1228 group_first_live_bucket(const struct xlate_ctx
*ctx
,
1229 const struct group_dpif
*group
, int depth
)
1231 struct ofputil_bucket
*bucket
;
1232 const struct list
*buckets
;
1234 group_dpif_get_buckets(group
, &buckets
);
1235 LIST_FOR_EACH (bucket
, list_node
, buckets
) {
1236 if (bucket_is_alive(ctx
, bucket
, depth
)) {
1244 static struct ofputil_bucket
*
1245 group_best_live_bucket(const struct xlate_ctx
*ctx
,
1246 const struct group_dpif
*group
,
1249 struct ofputil_bucket
*best_bucket
= NULL
;
1250 uint32_t best_score
= 0;
1253 struct ofputil_bucket
*bucket
;
1254 const struct list
*buckets
;
1256 group_dpif_get_buckets(group
, &buckets
);
1257 LIST_FOR_EACH (bucket
, list_node
, buckets
) {
1258 if (bucket_is_alive(ctx
, bucket
, 0)) {
1259 uint32_t score
= (hash_int(i
, basis
) & 0xffff) * bucket
->weight
;
1260 if (score
>= best_score
) {
1261 best_bucket
= bucket
;
1272 xbundle_trunks_vlan(const struct xbundle
*bundle
, uint16_t vlan
)
1274 return (bundle
->vlan_mode
!= PORT_VLAN_ACCESS
1275 && (!bundle
->trunks
|| bitmap_is_set(bundle
->trunks
, vlan
)));
1279 xbundle_includes_vlan(const struct xbundle
*xbundle
, uint16_t vlan
)
1281 return vlan
== xbundle
->vlan
|| xbundle_trunks_vlan(xbundle
, vlan
);
1284 static mirror_mask_t
1285 xbundle_mirror_out(const struct xbridge
*xbridge
, struct xbundle
*xbundle
)
1287 return xbundle
!= &ofpp_none_bundle
1288 ? mirror_bundle_out(xbridge
->mbridge
, xbundle
->ofbundle
)
1292 static mirror_mask_t
1293 xbundle_mirror_src(const struct xbridge
*xbridge
, struct xbundle
*xbundle
)
1295 return xbundle
!= &ofpp_none_bundle
1296 ? mirror_bundle_src(xbridge
->mbridge
, xbundle
->ofbundle
)
1300 static mirror_mask_t
1301 xbundle_mirror_dst(const struct xbridge
*xbridge
, struct xbundle
*xbundle
)
1303 return xbundle
!= &ofpp_none_bundle
1304 ? mirror_bundle_dst(xbridge
->mbridge
, xbundle
->ofbundle
)
1308 static struct xbundle
*
1309 lookup_input_bundle(const struct xbridge
*xbridge
, ofp_port_t in_port
,
1310 bool warn
, struct xport
**in_xportp
)
1312 struct xport
*xport
;
1314 /* Find the port and bundle for the received packet. */
1315 xport
= get_ofp_port(xbridge
, in_port
);
1319 if (xport
&& xport
->xbundle
) {
1320 return xport
->xbundle
;
1323 /* Special-case OFPP_NONE (OF1.0) and OFPP_CONTROLLER (OF1.1+),
1324 * which a controller may use as the ingress port for traffic that
1325 * it is sourcing. */
1326 if (in_port
== OFPP_CONTROLLER
|| in_port
== OFPP_NONE
) {
1327 return &ofpp_none_bundle
;
1330 /* Odd. A few possible reasons here:
1332 * - We deleted a port but there are still a few packets queued up
1335 * - Someone externally added a port (e.g. "ovs-dpctl add-if") that
1336 * we don't know about.
1338 * - The ofproto client didn't configure the port as part of a bundle.
1339 * This is particularly likely to happen if a packet was received on the
1340 * port after it was created, but before the client had a chance to
1341 * configure its bundle.
1344 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
1346 VLOG_WARN_RL(&rl
, "bridge %s: received packet on unknown "
1347 "port %"PRIu16
, xbridge
->name
, in_port
);
1353 add_mirror_actions(struct xlate_ctx
*ctx
, const struct flow
*orig_flow
)
1355 const struct xbridge
*xbridge
= ctx
->xbridge
;
1356 mirror_mask_t mirrors
;
1357 struct xbundle
*in_xbundle
;
1361 mirrors
= ctx
->xout
->mirrors
;
1362 ctx
->xout
->mirrors
= 0;
1364 in_xbundle
= lookup_input_bundle(xbridge
, orig_flow
->in_port
.ofp_port
,
1365 ctx
->xin
->packet
!= NULL
, NULL
);
1369 mirrors
|= xbundle_mirror_src(xbridge
, in_xbundle
);
1371 /* Drop frames on bundles reserved for mirroring. */
1372 if (xbundle_mirror_out(xbridge
, in_xbundle
)) {
1373 if (ctx
->xin
->packet
!= NULL
) {
1374 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
1375 VLOG_WARN_RL(&rl
, "bridge %s: dropping packet received on port "
1376 "%s, which is reserved exclusively for mirroring",
1377 ctx
->xbridge
->name
, in_xbundle
->name
);
1379 ofpbuf_clear(ctx
->xout
->odp_actions
);
1384 vid
= vlan_tci_to_vid(orig_flow
->vlan_tci
);
1385 if (!input_vid_is_valid(vid
, in_xbundle
, ctx
->xin
->packet
!= NULL
)) {
1388 vlan
= input_vid_to_vlan(in_xbundle
, vid
);
1394 /* Restore the original packet before adding the mirror actions. */
1395 ctx
->xin
->flow
= *orig_flow
;
1398 mirror_mask_t dup_mirrors
;
1399 struct ofbundle
*out
;
1400 unsigned long *vlans
;
1405 has_mirror
= mirror_get(xbridge
->mbridge
, raw_ctz(mirrors
),
1406 &vlans
, &dup_mirrors
, &out
, &out_vlan
);
1407 ovs_assert(has_mirror
);
1410 ctx
->xout
->wc
.masks
.vlan_tci
|= htons(VLAN_CFI
| VLAN_VID_MASK
);
1412 vlan_mirrored
= !vlans
|| bitmap_is_set(vlans
, vlan
);
1415 if (!vlan_mirrored
) {
1416 mirrors
= zero_rightmost_1bit(mirrors
);
1420 mirrors
&= ~dup_mirrors
;
1421 ctx
->xout
->mirrors
|= dup_mirrors
;
1423 struct xlate_cfg
*xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
1424 struct xbundle
*out_xbundle
= xbundle_lookup(xcfg
, out
);
1426 output_normal(ctx
, out_xbundle
, vlan
);
1428 } else if (vlan
!= out_vlan
1429 && !eth_addr_is_reserved(orig_flow
->dl_dst
)) {
1430 struct xbundle
*xbundle
;
1432 LIST_FOR_EACH (xbundle
, list_node
, &xbridge
->xbundles
) {
1433 if (xbundle_includes_vlan(xbundle
, out_vlan
)
1434 && !xbundle_mirror_out(xbridge
, xbundle
)) {
1435 output_normal(ctx
, xbundle
, out_vlan
);
1442 /* Given 'vid', the VID obtained from the 802.1Q header that was received as
1443 * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle',
1444 * the bundle on which the packet was received, returns the VLAN to which the
1447 * Both 'vid' and the return value are in the range 0...4095. */
1449 input_vid_to_vlan(const struct xbundle
*in_xbundle
, uint16_t vid
)
1451 switch (in_xbundle
->vlan_mode
) {
1452 case PORT_VLAN_ACCESS
:
1453 return in_xbundle
->vlan
;
1456 case PORT_VLAN_TRUNK
:
1459 case PORT_VLAN_NATIVE_UNTAGGED
:
1460 case PORT_VLAN_NATIVE_TAGGED
:
1461 return vid
? vid
: in_xbundle
->vlan
;
1468 /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'.
1469 * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs
1472 * 'vid' should be the VID obtained from the 802.1Q header that was received as
1473 * part of a packet (specify 0 if there was no 802.1Q header), in the range
1476 input_vid_is_valid(uint16_t vid
, struct xbundle
*in_xbundle
, bool warn
)
1478 /* Allow any VID on the OFPP_NONE port. */
1479 if (in_xbundle
== &ofpp_none_bundle
) {
1483 switch (in_xbundle
->vlan_mode
) {
1484 case PORT_VLAN_ACCESS
:
1487 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
1488 VLOG_WARN_RL(&rl
, "dropping VLAN %"PRIu16
" tagged "
1489 "packet received on port %s configured as VLAN "
1490 "%"PRIu16
" access port", vid
, in_xbundle
->name
,
1497 case PORT_VLAN_NATIVE_UNTAGGED
:
1498 case PORT_VLAN_NATIVE_TAGGED
:
1500 /* Port must always carry its native VLAN. */
1504 case PORT_VLAN_TRUNK
:
1505 if (!xbundle_includes_vlan(in_xbundle
, vid
)) {
1507 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
1508 VLOG_WARN_RL(&rl
, "dropping VLAN %"PRIu16
" packet "
1509 "received on port %s not configured for trunking "
1510 "VLAN %"PRIu16
, vid
, in_xbundle
->name
, vid
);
1522 /* Given 'vlan', the VLAN that a packet belongs to, and
1523 * 'out_xbundle', a bundle on which the packet is to be output, returns the VID
1524 * that should be included in the 802.1Q header. (If the return value is 0,
1525 * then the 802.1Q header should only be included in the packet if there is a
1528 * Both 'vlan' and the return value are in the range 0...4095. */
1530 output_vlan_to_vid(const struct xbundle
*out_xbundle
, uint16_t vlan
)
1532 switch (out_xbundle
->vlan_mode
) {
1533 case PORT_VLAN_ACCESS
:
1536 case PORT_VLAN_TRUNK
:
1537 case PORT_VLAN_NATIVE_TAGGED
:
1540 case PORT_VLAN_NATIVE_UNTAGGED
:
1541 return vlan
== out_xbundle
->vlan
? 0 : vlan
;
1549 output_normal(struct xlate_ctx
*ctx
, const struct xbundle
*out_xbundle
,
1552 ovs_be16
*flow_tci
= &ctx
->xin
->flow
.vlan_tci
;
1554 ovs_be16 tci
, old_tci
;
1555 struct xport
*xport
;
1557 vid
= output_vlan_to_vid(out_xbundle
, vlan
);
1558 if (list_is_empty(&out_xbundle
->xports
)) {
1559 /* Partially configured bundle with no slaves. Drop the packet. */
1561 } else if (!out_xbundle
->bond
) {
1562 ctx
->use_recirc
= false;
1563 xport
= CONTAINER_OF(list_front(&out_xbundle
->xports
), struct xport
,
1566 struct xlate_cfg
*xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
1567 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
1568 struct xlate_recirc
*xr
= &ctx
->recirc
;
1569 struct ofport_dpif
*ofport
;
1571 if (ctx
->xbridge
->enable_recirc
) {
1572 ctx
->use_recirc
= bond_may_recirc(
1573 out_xbundle
->bond
, &xr
->recirc_id
, &xr
->hash_basis
);
1575 if (ctx
->use_recirc
) {
1576 /* Only TCP mode uses recirculation. */
1577 xr
->hash_alg
= OVS_HASH_ALG_L4
;
1578 bond_update_post_recirc_rules(out_xbundle
->bond
, false);
1580 /* Recirculation does not require unmasking hash fields. */
1585 ofport
= bond_choose_output_slave(out_xbundle
->bond
,
1586 &ctx
->xin
->flow
, wc
, vid
);
1587 xport
= xport_lookup(xcfg
, ofport
);
1590 /* No slaves enabled, so drop packet. */
1594 /* If ctx->xout->use_recirc is set, the main thread will handle stats
1595 * accounting for this bond. */
1596 if (!ctx
->use_recirc
) {
1597 if (ctx
->xin
->resubmit_stats
) {
1598 bond_account(out_xbundle
->bond
, &ctx
->xin
->flow
, vid
,
1599 ctx
->xin
->resubmit_stats
->n_bytes
);
1601 if (ctx
->xin
->xcache
) {
1602 struct xc_entry
*entry
;
1605 flow
= &ctx
->xin
->flow
;
1606 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_BOND
);
1607 entry
->u
.bond
.bond
= bond_ref(out_xbundle
->bond
);
1608 entry
->u
.bond
.flow
= xmemdup(flow
, sizeof *flow
);
1609 entry
->u
.bond
.vid
= vid
;
1614 old_tci
= *flow_tci
;
1616 if (tci
|| out_xbundle
->use_priority_tags
) {
1617 tci
|= *flow_tci
& htons(VLAN_PCP_MASK
);
1619 tci
|= htons(VLAN_CFI
);
1624 compose_output_action(ctx
, xport
->ofp_port
);
1625 *flow_tci
= old_tci
;
1628 /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after
1629 * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to
1630 * indicate this; newer upstream kernels use gratuitous ARP requests. */
1632 is_gratuitous_arp(const struct flow
*flow
, struct flow_wildcards
*wc
)
1634 if (flow
->dl_type
!= htons(ETH_TYPE_ARP
)) {
1638 memset(&wc
->masks
.dl_dst
, 0xff, sizeof wc
->masks
.dl_dst
);
1639 if (!eth_addr_is_broadcast(flow
->dl_dst
)) {
1643 memset(&wc
->masks
.nw_proto
, 0xff, sizeof wc
->masks
.nw_proto
);
1644 if (flow
->nw_proto
== ARP_OP_REPLY
) {
1646 } else if (flow
->nw_proto
== ARP_OP_REQUEST
) {
1647 memset(&wc
->masks
.nw_src
, 0xff, sizeof wc
->masks
.nw_src
);
1648 memset(&wc
->masks
.nw_dst
, 0xff, sizeof wc
->masks
.nw_dst
);
1650 return flow
->nw_src
== flow
->nw_dst
;
1656 /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or
1657 * dropped. Returns true if they may be forwarded, false if they should be
1660 * 'in_port' must be the xport that corresponds to flow->in_port.
1661 * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull).
1663 * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as
1664 * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as
1665 * checked by input_vid_is_valid().
1667 * May also add tags to '*tags', although the current implementation only does
1668 * so in one special case.
1671 is_admissible(struct xlate_ctx
*ctx
, struct xport
*in_port
,
1674 struct xbundle
*in_xbundle
= in_port
->xbundle
;
1675 const struct xbridge
*xbridge
= ctx
->xbridge
;
1676 struct flow
*flow
= &ctx
->xin
->flow
;
1678 /* Drop frames for reserved multicast addresses
1679 * only if forward_bpdu option is absent. */
1680 if (!xbridge
->forward_bpdu
&& eth_addr_is_reserved(flow
->dl_dst
)) {
1681 xlate_report(ctx
, "packet has reserved destination MAC, dropping");
1685 if (in_xbundle
->bond
) {
1686 struct mac_entry
*mac
;
1688 switch (bond_check_admissibility(in_xbundle
->bond
, in_port
->ofport
,
1694 xlate_report(ctx
, "bonding refused admissibility, dropping");
1697 case BV_DROP_IF_MOVED
:
1698 ovs_rwlock_rdlock(&xbridge
->ml
->rwlock
);
1699 mac
= mac_learning_lookup(xbridge
->ml
, flow
->dl_src
, vlan
);
1700 if (mac
&& mac
->port
.p
!= in_xbundle
->ofbundle
&&
1701 (!is_gratuitous_arp(flow
, &ctx
->xout
->wc
)
1702 || mac_entry_is_grat_arp_locked(mac
))) {
1703 ovs_rwlock_unlock(&xbridge
->ml
->rwlock
);
1704 xlate_report(ctx
, "SLB bond thinks this packet looped back, "
1708 ovs_rwlock_unlock(&xbridge
->ml
->rwlock
);
1716 /* Checks whether a MAC learning update is necessary for MAC learning table
1717 * 'ml' given that a packet matching 'flow' was received on 'in_xbundle' in
1720 * Most packets processed through the MAC learning table do not actually
1721 * change it in any way. This function requires only a read lock on the MAC
1722 * learning table, so it is much cheaper in this common case.
1724 * Keep the code here synchronized with that in update_learning_table__()
1727 is_mac_learning_update_needed(const struct mac_learning
*ml
,
1728 const struct flow
*flow
,
1729 struct flow_wildcards
*wc
,
1730 int vlan
, struct xbundle
*in_xbundle
)
1731 OVS_REQ_RDLOCK(ml
->rwlock
)
1733 struct mac_entry
*mac
;
1735 if (!mac_learning_may_learn(ml
, flow
->dl_src
, vlan
)) {
1739 mac
= mac_learning_lookup(ml
, flow
->dl_src
, vlan
);
1740 if (!mac
|| mac_entry_age(ml
, mac
)) {
1744 if (is_gratuitous_arp(flow
, wc
)) {
1745 /* We don't want to learn from gratuitous ARP packets that are
1746 * reflected back over bond slaves so we lock the learning table. */
1747 if (!in_xbundle
->bond
) {
1749 } else if (mac_entry_is_grat_arp_locked(mac
)) {
1754 return mac
->port
.p
!= in_xbundle
->ofbundle
;
1758 /* Updates MAC learning table 'ml' given that a packet matching 'flow' was
1759 * received on 'in_xbundle' in 'vlan'.
1761 * This code repeats all the checks in is_mac_learning_update_needed() because
1762 * the lock was released between there and here and thus the MAC learning state
1763 * could have changed.
1765 * Keep the code here synchronized with that in is_mac_learning_update_needed()
1768 update_learning_table__(const struct xbridge
*xbridge
,
1769 const struct flow
*flow
, struct flow_wildcards
*wc
,
1770 int vlan
, struct xbundle
*in_xbundle
)
1771 OVS_REQ_WRLOCK(xbridge
->ml
->rwlock
)
1773 struct mac_entry
*mac
;
1775 if (!mac_learning_may_learn(xbridge
->ml
, flow
->dl_src
, vlan
)) {
1779 mac
= mac_learning_insert(xbridge
->ml
, flow
->dl_src
, vlan
);
1780 if (is_gratuitous_arp(flow
, wc
)) {
1781 /* We don't want to learn from gratuitous ARP packets that are
1782 * reflected back over bond slaves so we lock the learning table. */
1783 if (!in_xbundle
->bond
) {
1784 mac_entry_set_grat_arp_lock(mac
);
1785 } else if (mac_entry_is_grat_arp_locked(mac
)) {
1790 if (mac
->port
.p
!= in_xbundle
->ofbundle
) {
1791 /* The log messages here could actually be useful in debugging,
1792 * so keep the rate limit relatively high. */
1793 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(30, 300);
1795 VLOG_DBG_RL(&rl
, "bridge %s: learned that "ETH_ADDR_FMT
" is "
1796 "on port %s in VLAN %d",
1797 xbridge
->name
, ETH_ADDR_ARGS(flow
->dl_src
),
1798 in_xbundle
->name
, vlan
);
1800 mac
->port
.p
= in_xbundle
->ofbundle
;
1801 mac_learning_changed(xbridge
->ml
);
1806 update_learning_table(const struct xbridge
*xbridge
,
1807 const struct flow
*flow
, struct flow_wildcards
*wc
,
1808 int vlan
, struct xbundle
*in_xbundle
)
1812 /* Don't learn the OFPP_NONE port. */
1813 if (in_xbundle
== &ofpp_none_bundle
) {
1817 /* First try the common case: no change to MAC learning table. */
1818 ovs_rwlock_rdlock(&xbridge
->ml
->rwlock
);
1819 need_update
= is_mac_learning_update_needed(xbridge
->ml
, flow
, wc
, vlan
,
1821 ovs_rwlock_unlock(&xbridge
->ml
->rwlock
);
1824 /* Slow path: MAC learning table might need an update. */
1825 ovs_rwlock_wrlock(&xbridge
->ml
->rwlock
);
1826 update_learning_table__(xbridge
, flow
, wc
, vlan
, in_xbundle
);
1827 ovs_rwlock_unlock(&xbridge
->ml
->rwlock
);
1831 /* Updates multicast snooping table 'ms' given that a packet matching 'flow'
1832 * was received on 'in_xbundle' in 'vlan' and is either Report or Query. */
1834 update_mcast_snooping_table__(const struct xbridge
*xbridge
,
1835 const struct flow
*flow
,
1836 struct mcast_snooping
*ms
,
1837 ovs_be32 ip4
, int vlan
,
1838 struct xbundle
*in_xbundle
)
1839 OVS_REQ_WRLOCK(ms
->rwlock
)
1841 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(60, 30);
1843 switch (ntohs(flow
->tp_src
)) {
1844 case IGMP_HOST_MEMBERSHIP_REPORT
:
1845 case IGMPV2_HOST_MEMBERSHIP_REPORT
:
1846 if (mcast_snooping_add_group(ms
, ip4
, vlan
, in_xbundle
->ofbundle
)) {
1847 VLOG_DBG_RL(&rl
, "bridge %s: multicast snooping learned that "
1848 IP_FMT
" is on port %s in VLAN %d",
1849 xbridge
->name
, IP_ARGS(ip4
), in_xbundle
->name
, vlan
);
1852 case IGMP_HOST_LEAVE_MESSAGE
:
1853 if (mcast_snooping_leave_group(ms
, ip4
, vlan
, in_xbundle
->ofbundle
)) {
1854 VLOG_DBG_RL(&rl
, "bridge %s: multicast snooping leaving "
1855 IP_FMT
" is on port %s in VLAN %d",
1856 xbridge
->name
, IP_ARGS(ip4
), in_xbundle
->name
, vlan
);
1859 case IGMP_HOST_MEMBERSHIP_QUERY
:
1860 if (flow
->nw_src
&& mcast_snooping_add_mrouter(ms
, vlan
,
1861 in_xbundle
->ofbundle
)) {
1862 VLOG_DBG_RL(&rl
, "bridge %s: multicast snooping query from "
1863 IP_FMT
" is on port %s in VLAN %d",
1864 xbridge
->name
, IP_ARGS(flow
->nw_src
),
1865 in_xbundle
->name
, vlan
);
1871 /* Updates multicast snooping table 'ms' given that a packet matching 'flow'
1872 * was received on 'in_xbundle' in 'vlan'. */
1874 update_mcast_snooping_table(const struct xbridge
*xbridge
,
1875 const struct flow
*flow
, int vlan
,
1876 struct xbundle
*in_xbundle
)
1878 struct mcast_snooping
*ms
= xbridge
->ms
;
1879 struct xlate_cfg
*xcfg
;
1880 struct xbundle
*mcast_xbundle
;
1881 struct mcast_fport_bundle
*fport
;
1883 /* Don't learn the OFPP_NONE port. */
1884 if (in_xbundle
== &ofpp_none_bundle
) {
1888 /* Don't learn from flood ports */
1889 mcast_xbundle
= NULL
;
1890 ovs_rwlock_wrlock(&ms
->rwlock
);
1891 xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
1892 LIST_FOR_EACH(fport
, fport_node
, &ms
->fport_list
) {
1893 mcast_xbundle
= xbundle_lookup(xcfg
, fport
->port
);
1894 if (mcast_xbundle
== in_xbundle
) {
1899 if (!mcast_xbundle
|| mcast_xbundle
!= in_xbundle
) {
1900 update_mcast_snooping_table__(xbridge
, flow
, ms
, flow
->igmp_group_ip4
,
1903 ovs_rwlock_unlock(&ms
->rwlock
);
1906 /* send the packet to ports having the multicast group learned */
1908 xlate_normal_mcast_send_group(struct xlate_ctx
*ctx
,
1909 struct mcast_snooping
*ms OVS_UNUSED
,
1910 struct mcast_group
*grp
,
1911 struct xbundle
*in_xbundle
, uint16_t vlan
)
1912 OVS_REQ_RDLOCK(ms
->rwlock
)
1914 struct xlate_cfg
*xcfg
;
1915 struct mcast_group_bundle
*b
;
1916 struct xbundle
*mcast_xbundle
;
1918 xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
1919 LIST_FOR_EACH(b
, bundle_node
, &grp
->bundle_lru
) {
1920 mcast_xbundle
= xbundle_lookup(xcfg
, b
->port
);
1921 if (mcast_xbundle
&& mcast_xbundle
!= in_xbundle
) {
1922 xlate_report(ctx
, "forwarding to mcast group port");
1923 output_normal(ctx
, mcast_xbundle
, vlan
);
1924 } else if (!mcast_xbundle
) {
1925 xlate_report(ctx
, "mcast group port is unknown, dropping");
1927 xlate_report(ctx
, "mcast group port is input port, dropping");
1932 /* send the packet to ports connected to multicast routers */
1934 xlate_normal_mcast_send_mrouters(struct xlate_ctx
*ctx
,
1935 struct mcast_snooping
*ms
,
1936 struct xbundle
*in_xbundle
, uint16_t vlan
)
1937 OVS_REQ_RDLOCK(ms
->rwlock
)
1939 struct xlate_cfg
*xcfg
;
1940 struct mcast_mrouter_bundle
*mrouter
;
1941 struct xbundle
*mcast_xbundle
;
1943 xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
1944 LIST_FOR_EACH(mrouter
, mrouter_node
, &ms
->mrouter_lru
) {
1945 mcast_xbundle
= xbundle_lookup(xcfg
, mrouter
->port
);
1946 if (mcast_xbundle
&& mcast_xbundle
!= in_xbundle
) {
1947 xlate_report(ctx
, "forwarding to mcast router port");
1948 output_normal(ctx
, mcast_xbundle
, vlan
);
1949 } else if (!mcast_xbundle
) {
1950 xlate_report(ctx
, "mcast router port is unknown, dropping");
1952 xlate_report(ctx
, "mcast router port is input port, dropping");
1957 /* send the packet to ports flagged to be flooded */
1959 xlate_normal_mcast_send_fports(struct xlate_ctx
*ctx
,
1960 struct mcast_snooping
*ms
,
1961 struct xbundle
*in_xbundle
, uint16_t vlan
)
1962 OVS_REQ_RDLOCK(ms
->rwlock
)
1964 struct xlate_cfg
*xcfg
;
1965 struct mcast_fport_bundle
*fport
;
1966 struct xbundle
*mcast_xbundle
;
1968 xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
1969 LIST_FOR_EACH(fport
, fport_node
, &ms
->fport_list
) {
1970 mcast_xbundle
= xbundle_lookup(xcfg
, fport
->port
);
1971 if (mcast_xbundle
&& mcast_xbundle
!= in_xbundle
) {
1972 xlate_report(ctx
, "forwarding to mcast flood port");
1973 output_normal(ctx
, mcast_xbundle
, vlan
);
1974 } else if (!mcast_xbundle
) {
1975 xlate_report(ctx
, "mcast flood port is unknown, dropping");
1977 xlate_report(ctx
, "mcast flood port is input port, dropping");
1983 xlate_normal_flood(struct xlate_ctx
*ctx
, struct xbundle
*in_xbundle
,
1986 struct xbundle
*xbundle
;
1988 LIST_FOR_EACH (xbundle
, list_node
, &ctx
->xbridge
->xbundles
) {
1989 if (xbundle
!= in_xbundle
1990 && xbundle_includes_vlan(xbundle
, vlan
)
1991 && xbundle
->floodable
1992 && !xbundle_mirror_out(ctx
->xbridge
, xbundle
)) {
1993 output_normal(ctx
, xbundle
, vlan
);
1996 ctx
->xout
->nf_output_iface
= NF_OUT_FLOOD
;
2000 xlate_normal(struct xlate_ctx
*ctx
)
2002 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
2003 struct flow
*flow
= &ctx
->xin
->flow
;
2004 struct xbundle
*in_xbundle
;
2005 struct xport
*in_port
;
2006 struct mac_entry
*mac
;
2011 ctx
->xout
->has_normal
= true;
2013 memset(&wc
->masks
.dl_src
, 0xff, sizeof wc
->masks
.dl_src
);
2014 memset(&wc
->masks
.dl_dst
, 0xff, sizeof wc
->masks
.dl_dst
);
2015 wc
->masks
.vlan_tci
|= htons(VLAN_VID_MASK
| VLAN_CFI
);
2017 in_xbundle
= lookup_input_bundle(ctx
->xbridge
, flow
->in_port
.ofp_port
,
2018 ctx
->xin
->packet
!= NULL
, &in_port
);
2020 xlate_report(ctx
, "no input bundle, dropping");
2024 /* Drop malformed frames. */
2025 if (flow
->dl_type
== htons(ETH_TYPE_VLAN
) &&
2026 !(flow
->vlan_tci
& htons(VLAN_CFI
))) {
2027 if (ctx
->xin
->packet
!= NULL
) {
2028 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
2029 VLOG_WARN_RL(&rl
, "bridge %s: dropping packet with partial "
2030 "VLAN tag received on port %s",
2031 ctx
->xbridge
->name
, in_xbundle
->name
);
2033 xlate_report(ctx
, "partial VLAN tag, dropping");
2037 /* Drop frames on bundles reserved for mirroring. */
2038 if (xbundle_mirror_out(ctx
->xbridge
, in_xbundle
)) {
2039 if (ctx
->xin
->packet
!= NULL
) {
2040 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
2041 VLOG_WARN_RL(&rl
, "bridge %s: dropping packet received on port "
2042 "%s, which is reserved exclusively for mirroring",
2043 ctx
->xbridge
->name
, in_xbundle
->name
);
2045 xlate_report(ctx
, "input port is mirror output port, dropping");
2050 vid
= vlan_tci_to_vid(flow
->vlan_tci
);
2051 if (!input_vid_is_valid(vid
, in_xbundle
, ctx
->xin
->packet
!= NULL
)) {
2052 xlate_report(ctx
, "disallowed VLAN VID for this input port, dropping");
2055 vlan
= input_vid_to_vlan(in_xbundle
, vid
);
2057 /* Check other admissibility requirements. */
2058 if (in_port
&& !is_admissible(ctx
, in_port
, vlan
)) {
2062 /* Learn source MAC. */
2063 if (ctx
->xin
->may_learn
) {
2064 update_learning_table(ctx
->xbridge
, flow
, wc
, vlan
, in_xbundle
);
2066 if (ctx
->xin
->xcache
) {
2067 struct xc_entry
*entry
;
2069 /* Save enough info to update mac learning table later. */
2070 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_NORMAL
);
2071 entry
->u
.normal
.ofproto
= ctx
->xbridge
->ofproto
;
2072 entry
->u
.normal
.flow
= xmemdup(flow
, sizeof *flow
);
2073 entry
->u
.normal
.vlan
= vlan
;
2076 /* Determine output bundle. */
2077 if (mcast_snooping_enabled(ctx
->xbridge
->ms
)
2078 && !eth_addr_is_broadcast(flow
->dl_dst
)
2079 && eth_addr_is_multicast(flow
->dl_dst
)
2080 && flow
->dl_type
== htons(ETH_TYPE_IP
)) {
2081 struct mcast_snooping
*ms
= ctx
->xbridge
->ms
;
2082 struct mcast_group
*grp
;
2084 if (flow
->nw_proto
== IPPROTO_IGMP
) {
2085 if (ctx
->xin
->may_learn
) {
2086 if (mcast_snooping_is_membership(flow
->tp_src
) ||
2087 mcast_snooping_is_query(flow
->tp_src
)) {
2088 update_mcast_snooping_table(ctx
->xbridge
, flow
, vlan
,
2093 if (mcast_snooping_is_membership(flow
->tp_src
)) {
2094 ovs_rwlock_rdlock(&ms
->rwlock
);
2095 xlate_normal_mcast_send_mrouters(ctx
, ms
, in_xbundle
, vlan
);
2096 ovs_rwlock_unlock(&ms
->rwlock
);
2098 xlate_report(ctx
, "multicast traffic, flooding");
2099 xlate_normal_flood(ctx
, in_xbundle
, vlan
);
2103 if (ip_is_local_multicast(flow
->nw_dst
)) {
2104 /* RFC4541: section 2.1.2, item 2: Packets with a dst IP
2105 * address in the 224.0.0.x range which are not IGMP must
2106 * be forwarded on all ports */
2107 xlate_report(ctx
, "RFC4541: section 2.1.2, item 2, flooding");
2108 xlate_normal_flood(ctx
, in_xbundle
, vlan
);
2113 /* forwarding to group base ports */
2114 ovs_rwlock_rdlock(&ms
->rwlock
);
2115 grp
= mcast_snooping_lookup(ms
, flow
->nw_dst
, vlan
);
2117 xlate_normal_mcast_send_group(ctx
, ms
, grp
, in_xbundle
, vlan
);
2118 xlate_normal_mcast_send_fports(ctx
, ms
, in_xbundle
, vlan
);
2119 xlate_normal_mcast_send_mrouters(ctx
, ms
, in_xbundle
, vlan
);
2121 if (mcast_snooping_flood_unreg(ms
)) {
2122 xlate_report(ctx
, "unregistered multicast, flooding");
2123 xlate_normal_flood(ctx
, in_xbundle
, vlan
);
2125 xlate_normal_mcast_send_mrouters(ctx
, ms
, in_xbundle
, vlan
);
2126 xlate_normal_mcast_send_fports(ctx
, ms
, in_xbundle
, vlan
);
2129 ovs_rwlock_unlock(&ms
->rwlock
);
2131 ovs_rwlock_rdlock(&ctx
->xbridge
->ml
->rwlock
);
2132 mac
= mac_learning_lookup(ctx
->xbridge
->ml
, flow
->dl_dst
, vlan
);
2133 mac_port
= mac
? mac
->port
.p
: NULL
;
2134 ovs_rwlock_unlock(&ctx
->xbridge
->ml
->rwlock
);
2137 struct xlate_cfg
*xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
2138 struct xbundle
*mac_xbundle
= xbundle_lookup(xcfg
, mac_port
);
2139 if (mac_xbundle
&& mac_xbundle
!= in_xbundle
) {
2140 xlate_report(ctx
, "forwarding to learned port");
2141 output_normal(ctx
, mac_xbundle
, vlan
);
2142 } else if (!mac_xbundle
) {
2143 xlate_report(ctx
, "learned port is unknown, dropping");
2145 xlate_report(ctx
, "learned port is input port, dropping");
2148 xlate_report(ctx
, "no learned MAC for destination, flooding");
2149 xlate_normal_flood(ctx
, in_xbundle
, vlan
);
2154 /* Compose SAMPLE action for sFlow or IPFIX. The given probability is
2155 * the number of packets out of UINT32_MAX to sample. The given
2156 * cookie is passed back in the callback for each sampled packet.
2159 compose_sample_action(const struct xbridge
*xbridge
,
2160 struct ofpbuf
*odp_actions
,
2161 const struct flow
*flow
,
2162 const uint32_t probability
,
2163 const union user_action_cookie
*cookie
,
2164 const size_t cookie_size
,
2165 const odp_port_t tunnel_out_port
)
2167 size_t sample_offset
, actions_offset
;
2168 odp_port_t odp_port
;
2172 sample_offset
= nl_msg_start_nested(odp_actions
, OVS_ACTION_ATTR_SAMPLE
);
2174 nl_msg_put_u32(odp_actions
, OVS_SAMPLE_ATTR_PROBABILITY
, probability
);
2176 actions_offset
= nl_msg_start_nested(odp_actions
, OVS_SAMPLE_ATTR_ACTIONS
);
2178 odp_port
= ofp_port_to_odp_port(xbridge
, flow
->in_port
.ofp_port
);
2179 pid
= dpif_port_get_pid(xbridge
->dpif
, odp_port
,
2180 flow_hash_5tuple(flow
, 0));
2181 cookie_offset
= odp_put_userspace_action(pid
, cookie
, cookie_size
,
2182 tunnel_out_port
, odp_actions
);
2184 nl_msg_end_nested(odp_actions
, actions_offset
);
2185 nl_msg_end_nested(odp_actions
, sample_offset
);
2186 return cookie_offset
;
2190 compose_sflow_cookie(const struct xbridge
*xbridge
, ovs_be16 vlan_tci
,
2191 odp_port_t odp_port
, unsigned int n_outputs
,
2192 union user_action_cookie
*cookie
)
2196 cookie
->type
= USER_ACTION_COOKIE_SFLOW
;
2197 cookie
->sflow
.vlan_tci
= vlan_tci
;
2199 /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output
2200 * port information") for the interpretation of cookie->output. */
2201 switch (n_outputs
) {
2203 /* 0x40000000 | 256 means "packet dropped for unknown reason". */
2204 cookie
->sflow
.output
= 0x40000000 | 256;
2208 ifindex
= dpif_sflow_odp_port_to_ifindex(xbridge
->sflow
, odp_port
);
2210 cookie
->sflow
.output
= ifindex
;
2215 /* 0x80000000 means "multiple output ports. */
2216 cookie
->sflow
.output
= 0x80000000 | n_outputs
;
2221 /* Compose SAMPLE action for sFlow bridge sampling. */
2223 compose_sflow_action(const struct xbridge
*xbridge
,
2224 struct ofpbuf
*odp_actions
,
2225 const struct flow
*flow
,
2226 odp_port_t odp_port
)
2228 uint32_t probability
;
2229 union user_action_cookie cookie
;
2231 if (!xbridge
->sflow
|| flow
->in_port
.ofp_port
== OFPP_NONE
) {
2235 probability
= dpif_sflow_get_probability(xbridge
->sflow
);
2236 compose_sflow_cookie(xbridge
, htons(0), odp_port
,
2237 odp_port
== ODPP_NONE
? 0 : 1, &cookie
);
2239 return compose_sample_action(xbridge
, odp_actions
, flow
, probability
,
2240 &cookie
, sizeof cookie
.sflow
, ODPP_NONE
);
2244 compose_flow_sample_cookie(uint16_t probability
, uint32_t collector_set_id
,
2245 uint32_t obs_domain_id
, uint32_t obs_point_id
,
2246 union user_action_cookie
*cookie
)
2248 cookie
->type
= USER_ACTION_COOKIE_FLOW_SAMPLE
;
2249 cookie
->flow_sample
.probability
= probability
;
2250 cookie
->flow_sample
.collector_set_id
= collector_set_id
;
2251 cookie
->flow_sample
.obs_domain_id
= obs_domain_id
;
2252 cookie
->flow_sample
.obs_point_id
= obs_point_id
;
2256 compose_ipfix_cookie(union user_action_cookie
*cookie
,
2257 odp_port_t output_odp_port
)
2259 cookie
->type
= USER_ACTION_COOKIE_IPFIX
;
2260 cookie
->ipfix
.output_odp_port
= output_odp_port
;
2263 /* Compose SAMPLE action for IPFIX bridge sampling. */
2265 compose_ipfix_action(const struct xbridge
*xbridge
,
2266 struct ofpbuf
*odp_actions
,
2267 const struct flow
*flow
,
2268 odp_port_t output_odp_port
)
2270 uint32_t probability
;
2271 union user_action_cookie cookie
;
2272 odp_port_t tunnel_out_port
= ODPP_NONE
;
2274 if (!xbridge
->ipfix
|| flow
->in_port
.ofp_port
== OFPP_NONE
) {
2278 /* For input case, output_odp_port is ODPP_NONE, which is an invalid port
2280 if (output_odp_port
== ODPP_NONE
&&
2281 !dpif_ipfix_get_bridge_exporter_input_sampling(xbridge
->ipfix
)) {
2285 /* For output case, output_odp_port is valid*/
2286 if (output_odp_port
!= ODPP_NONE
) {
2287 if (!dpif_ipfix_get_bridge_exporter_output_sampling(xbridge
->ipfix
)) {
2290 /* If tunnel sampling is enabled, put an additional option attribute:
2291 * OVS_USERSPACE_ATTR_TUNNEL_OUT_PORT
2293 if (dpif_ipfix_get_bridge_exporter_tunnel_sampling(xbridge
->ipfix
) &&
2294 dpif_ipfix_get_tunnel_port(xbridge
->ipfix
, output_odp_port
) ) {
2295 tunnel_out_port
= output_odp_port
;
2299 probability
= dpif_ipfix_get_bridge_exporter_probability(xbridge
->ipfix
);
2300 compose_ipfix_cookie(&cookie
, output_odp_port
);
2302 compose_sample_action(xbridge
, odp_actions
, flow
, probability
,
2303 &cookie
, sizeof cookie
.ipfix
, tunnel_out_port
);
2306 /* SAMPLE action for sFlow must be first action in any given list of
2307 * actions. At this point we do not have all information required to
2308 * build it. So try to build sample action as complete as possible. */
2310 add_sflow_action(struct xlate_ctx
*ctx
)
2312 ctx
->user_cookie_offset
= compose_sflow_action(ctx
->xbridge
,
2313 ctx
->xout
->odp_actions
,
2314 &ctx
->xin
->flow
, ODPP_NONE
);
2315 ctx
->sflow_odp_port
= 0;
2316 ctx
->sflow_n_outputs
= 0;
2319 /* SAMPLE action for IPFIX must be 1st or 2nd action in any given list
2320 * of actions, eventually after the SAMPLE action for sFlow. */
2322 add_ipfix_action(struct xlate_ctx
*ctx
)
2324 compose_ipfix_action(ctx
->xbridge
, ctx
->xout
->odp_actions
,
2325 &ctx
->xin
->flow
, ODPP_NONE
);
2329 add_ipfix_output_action(struct xlate_ctx
*ctx
, odp_port_t port
)
2331 compose_ipfix_action(ctx
->xbridge
, ctx
->xout
->odp_actions
,
2332 &ctx
->xin
->flow
, port
);
2335 /* Fix SAMPLE action according to data collected while composing ODP actions.
2336 * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested
2337 * USERSPACE action's user-cookie which is required for sflow. */
2339 fix_sflow_action(struct xlate_ctx
*ctx
)
2341 const struct flow
*base
= &ctx
->base_flow
;
2342 union user_action_cookie
*cookie
;
2344 if (!ctx
->user_cookie_offset
) {
2348 cookie
= ofpbuf_at(ctx
->xout
->odp_actions
, ctx
->user_cookie_offset
,
2349 sizeof cookie
->sflow
);
2350 ovs_assert(cookie
->type
== USER_ACTION_COOKIE_SFLOW
);
2352 compose_sflow_cookie(ctx
->xbridge
, base
->vlan_tci
,
2353 ctx
->sflow_odp_port
, ctx
->sflow_n_outputs
, cookie
);
2356 static enum slow_path_reason
2357 process_special(struct xlate_ctx
*ctx
, const struct flow
*flow
,
2358 const struct xport
*xport
, const struct ofpbuf
*packet
)
2360 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
2361 const struct xbridge
*xbridge
= ctx
->xbridge
;
2365 } else if (xport
->cfm
&& cfm_should_process_flow(xport
->cfm
, flow
, wc
)) {
2367 cfm_process_heartbeat(xport
->cfm
, packet
);
2370 } else if (xport
->bfd
&& bfd_should_process_flow(xport
->bfd
, flow
, wc
)) {
2372 bfd_process_packet(xport
->bfd
, flow
, packet
);
2373 /* If POLL received, immediately sends FINAL back. */
2374 if (bfd_should_send_packet(xport
->bfd
)) {
2375 ofproto_dpif_monitor_port_send_soon(xport
->ofport
);
2379 } else if (xport
->xbundle
&& xport
->xbundle
->lacp
2380 && flow
->dl_type
== htons(ETH_TYPE_LACP
)) {
2382 lacp_process_packet(xport
->xbundle
->lacp
, xport
->ofport
, packet
);
2385 } else if (xbridge
->stp
&& stp_should_process_flow(flow
, wc
)) {
2387 stp_process_packet(xport
, packet
);
2396 compose_output_action__(struct xlate_ctx
*ctx
, ofp_port_t ofp_port
,
2399 const struct xport
*xport
= get_ofp_port(ctx
->xbridge
, ofp_port
);
2400 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
2401 struct flow
*flow
= &ctx
->xin
->flow
;
2402 ovs_be16 flow_vlan_tci
;
2403 uint32_t flow_pkt_mark
;
2404 uint8_t flow_nw_tos
;
2405 odp_port_t out_port
, odp_port
;
2408 /* If 'struct flow' gets additional metadata, we'll need to zero it out
2409 * before traversing a patch port. */
2410 BUILD_ASSERT_DECL(FLOW_WC_SEQ
== 27);
2413 xlate_report(ctx
, "Nonexistent output port");
2415 } else if (xport
->config
& OFPUTIL_PC_NO_FWD
) {
2416 xlate_report(ctx
, "OFPPC_NO_FWD set, skipping output");
2418 } else if (check_stp
) {
2419 if (is_stp(&ctx
->base_flow
)) {
2420 if (!xport_stp_should_forward_bpdu(xport
)) {
2421 xlate_report(ctx
, "STP not in listening state, "
2422 "skipping bpdu output");
2425 } else if (!xport_stp_forward_state(xport
)) {
2426 xlate_report(ctx
, "STP not in forwarding state, "
2432 if (mbridge_has_mirrors(ctx
->xbridge
->mbridge
) && xport
->xbundle
) {
2433 ctx
->xout
->mirrors
|= xbundle_mirror_dst(xport
->xbundle
->xbridge
,
2438 const struct xport
*peer
= xport
->peer
;
2439 struct flow old_flow
= ctx
->xin
->flow
;
2440 enum slow_path_reason special
;
2442 ctx
->xbridge
= peer
->xbridge
;
2443 flow
->in_port
.ofp_port
= peer
->ofp_port
;
2444 flow
->metadata
= htonll(0);
2445 memset(&flow
->tunnel
, 0, sizeof flow
->tunnel
);
2446 memset(flow
->regs
, 0, sizeof flow
->regs
);
2448 special
= process_special(ctx
, &ctx
->xin
->flow
, peer
,
2451 ctx
->xout
->slow
|= special
;
2452 } else if (may_receive(peer
, ctx
)) {
2453 if (xport_stp_forward_state(peer
)) {
2454 xlate_table_action(ctx
, flow
->in_port
.ofp_port
, 0, true, true);
2456 /* Forwarding is disabled by STP. Let OFPP_NORMAL and the
2457 * learning action look at the packet, then drop it. */
2458 struct flow old_base_flow
= ctx
->base_flow
;
2459 size_t old_size
= ofpbuf_size(ctx
->xout
->odp_actions
);
2460 mirror_mask_t old_mirrors
= ctx
->xout
->mirrors
;
2461 xlate_table_action(ctx
, flow
->in_port
.ofp_port
, 0, true, true);
2462 ctx
->xout
->mirrors
= old_mirrors
;
2463 ctx
->base_flow
= old_base_flow
;
2464 ofpbuf_set_size(ctx
->xout
->odp_actions
, old_size
);
2468 ctx
->xin
->flow
= old_flow
;
2469 ctx
->xbridge
= xport
->xbridge
;
2471 if (ctx
->xin
->resubmit_stats
) {
2472 netdev_vport_inc_tx(xport
->netdev
, ctx
->xin
->resubmit_stats
);
2473 netdev_vport_inc_rx(peer
->netdev
, ctx
->xin
->resubmit_stats
);
2475 bfd_account_rx(peer
->bfd
, ctx
->xin
->resubmit_stats
);
2478 if (ctx
->xin
->xcache
) {
2479 struct xc_entry
*entry
;
2481 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_NETDEV
);
2482 entry
->u
.dev
.tx
= netdev_ref(xport
->netdev
);
2483 entry
->u
.dev
.rx
= netdev_ref(peer
->netdev
);
2484 entry
->u
.dev
.bfd
= bfd_ref(peer
->bfd
);
2489 flow_vlan_tci
= flow
->vlan_tci
;
2490 flow_pkt_mark
= flow
->pkt_mark
;
2491 flow_nw_tos
= flow
->nw_tos
;
2493 if (dscp_from_skb_priority(xport
, flow
->skb_priority
, &dscp
)) {
2494 wc
->masks
.nw_tos
|= IP_DSCP_MASK
;
2495 flow
->nw_tos
&= ~IP_DSCP_MASK
;
2496 flow
->nw_tos
|= dscp
;
2499 if (xport
->is_tunnel
) {
2500 /* Save tunnel metadata so that changes made due to
2501 * the Logical (tunnel) Port are not visible for any further
2502 * matches, while explicit set actions on tunnel metadata are.
2504 struct flow_tnl flow_tnl
= flow
->tunnel
;
2505 odp_port
= tnl_port_send(xport
->ofport
, flow
, &ctx
->xout
->wc
);
2506 if (odp_port
== ODPP_NONE
) {
2507 xlate_report(ctx
, "Tunneling decided against output");
2508 goto out
; /* restore flow_nw_tos */
2510 if (flow
->tunnel
.ip_dst
== ctx
->orig_tunnel_ip_dst
) {
2511 xlate_report(ctx
, "Not tunneling to our own address");
2512 goto out
; /* restore flow_nw_tos */
2514 if (ctx
->xin
->resubmit_stats
) {
2515 netdev_vport_inc_tx(xport
->netdev
, ctx
->xin
->resubmit_stats
);
2517 if (ctx
->xin
->xcache
) {
2518 struct xc_entry
*entry
;
2520 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_NETDEV
);
2521 entry
->u
.dev
.tx
= netdev_ref(xport
->netdev
);
2523 out_port
= odp_port
;
2524 commit_odp_tunnel_action(flow
, &ctx
->base_flow
,
2525 ctx
->xout
->odp_actions
);
2526 flow
->tunnel
= flow_tnl
; /* Restore tunnel metadata */
2528 odp_port
= xport
->odp_port
;
2529 out_port
= odp_port
;
2530 if (ofproto_has_vlan_splinters(ctx
->xbridge
->ofproto
)) {
2531 ofp_port_t vlandev_port
;
2533 wc
->masks
.vlan_tci
|= htons(VLAN_VID_MASK
| VLAN_CFI
);
2534 vlandev_port
= vsp_realdev_to_vlandev(ctx
->xbridge
->ofproto
,
2535 ofp_port
, flow
->vlan_tci
);
2536 if (vlandev_port
!= ofp_port
) {
2537 out_port
= ofp_port_to_odp_port(ctx
->xbridge
, vlandev_port
);
2538 flow
->vlan_tci
= htons(0);
2543 if (out_port
!= ODPP_NONE
) {
2544 ctx
->xout
->slow
|= commit_odp_actions(flow
, &ctx
->base_flow
,
2545 ctx
->xout
->odp_actions
,
2548 if (ctx
->use_recirc
) {
2549 struct ovs_action_hash
*act_hash
;
2550 struct xlate_recirc
*xr
= &ctx
->recirc
;
2553 act_hash
= nl_msg_put_unspec_uninit(ctx
->xout
->odp_actions
,
2554 OVS_ACTION_ATTR_HASH
,
2556 act_hash
->hash_alg
= xr
->hash_alg
;
2557 act_hash
->hash_basis
= xr
->hash_basis
;
2559 /* Recirc action. */
2560 nl_msg_put_u32(ctx
->xout
->odp_actions
, OVS_ACTION_ATTR_RECIRC
,
2563 add_ipfix_output_action(ctx
, out_port
);
2564 nl_msg_put_odp_port(ctx
->xout
->odp_actions
, OVS_ACTION_ATTR_OUTPUT
,
2568 ctx
->sflow_odp_port
= odp_port
;
2569 ctx
->sflow_n_outputs
++;
2570 ctx
->xout
->nf_output_iface
= ofp_port
;
2575 flow
->vlan_tci
= flow_vlan_tci
;
2576 flow
->pkt_mark
= flow_pkt_mark
;
2577 flow
->nw_tos
= flow_nw_tos
;
2581 compose_output_action(struct xlate_ctx
*ctx
, ofp_port_t ofp_port
)
2583 compose_output_action__(ctx
, ofp_port
, true);
2587 xlate_recursively(struct xlate_ctx
*ctx
, struct rule_dpif
*rule
)
2589 struct rule_dpif
*old_rule
= ctx
->rule
;
2590 const struct rule_actions
*actions
;
2592 if (ctx
->xin
->resubmit_stats
) {
2593 rule_dpif_credit_stats(rule
, ctx
->xin
->resubmit_stats
);
2599 actions
= rule_dpif_get_actions(rule
);
2600 do_xlate_actions(actions
->ofpacts
, actions
->ofpacts_len
, ctx
);
2601 ctx
->rule
= old_rule
;
2606 xlate_resubmit_resource_check(struct xlate_ctx
*ctx
)
2608 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 1);
2610 if (ctx
->recurse
>= MAX_RESUBMIT_RECURSION
+ MAX_INTERNAL_RESUBMITS
) {
2611 VLOG_ERR_RL(&rl
, "resubmit actions recursed over %d times",
2612 MAX_RESUBMIT_RECURSION
);
2613 } else if (ctx
->resubmits
>= MAX_RESUBMITS
+ MAX_INTERNAL_RESUBMITS
) {
2614 VLOG_ERR_RL(&rl
, "over %d resubmit actions", MAX_RESUBMITS
);
2615 } else if (ofpbuf_size(ctx
->xout
->odp_actions
) > UINT16_MAX
) {
2616 VLOG_ERR_RL(&rl
, "resubmits yielded over 64 kB of actions");
2617 } else if (ofpbuf_size(&ctx
->stack
) >= 65536) {
2618 VLOG_ERR_RL(&rl
, "resubmits yielded over 64 kB of stack");
2627 xlate_table_action(struct xlate_ctx
*ctx
, ofp_port_t in_port
, uint8_t table_id
,
2628 bool may_packet_in
, bool honor_table_miss
)
2630 if (xlate_resubmit_resource_check(ctx
)) {
2631 ofp_port_t old_in_port
= ctx
->xin
->flow
.in_port
.ofp_port
;
2632 bool skip_wildcards
= ctx
->xin
->skip_wildcards
;
2633 uint8_t old_table_id
= ctx
->table_id
;
2634 struct rule_dpif
*rule
;
2635 enum rule_dpif_lookup_verdict verdict
;
2636 enum ofputil_port_config config
= 0;
2638 ctx
->table_id
= table_id
;
2640 /* Look up a flow with 'in_port' as the input port. Then restore the
2641 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
2642 * have surprising behavior). */
2643 ctx
->xin
->flow
.in_port
.ofp_port
= in_port
;
2644 verdict
= rule_dpif_lookup_from_table(ctx
->xbridge
->ofproto
,
2647 ? &ctx
->xout
->wc
: NULL
,
2649 &ctx
->table_id
, &rule
,
2650 ctx
->xin
->xcache
!= NULL
,
2651 ctx
->xin
->resubmit_stats
);
2652 ctx
->xin
->flow
.in_port
.ofp_port
= old_in_port
;
2654 if (ctx
->xin
->resubmit_hook
) {
2655 ctx
->xin
->resubmit_hook(ctx
->xin
, rule
, ctx
->recurse
);
2659 case RULE_DPIF_LOOKUP_VERDICT_MATCH
:
2661 case RULE_DPIF_LOOKUP_VERDICT_CONTROLLER
:
2662 if (may_packet_in
) {
2663 struct xport
*xport
;
2665 xport
= get_ofp_port(ctx
->xbridge
,
2666 ctx
->xin
->flow
.in_port
.ofp_port
);
2667 config
= xport
? xport
->config
: 0;
2670 /* Fall through to drop */
2671 case RULE_DPIF_LOOKUP_VERDICT_DROP
:
2672 config
= OFPUTIL_PC_NO_PACKET_IN
;
2674 case RULE_DPIF_LOOKUP_VERDICT_DEFAULT
:
2675 if (!ofproto_dpif_wants_packet_in_on_miss(ctx
->xbridge
->ofproto
)) {
2676 config
= OFPUTIL_PC_NO_PACKET_IN
;
2683 choose_miss_rule(config
, ctx
->xbridge
->miss_rule
,
2684 ctx
->xbridge
->no_packet_in_rule
, &rule
,
2685 ctx
->xin
->xcache
!= NULL
);
2689 /* Fill in the cache entry here instead of xlate_recursively
2690 * to make the reference counting more explicit. We take a
2691 * reference in the lookups above if we are going to cache the
2693 if (ctx
->xin
->xcache
) {
2694 struct xc_entry
*entry
;
2696 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_RULE
);
2697 entry
->u
.rule
= rule
;
2699 xlate_recursively(ctx
, rule
);
2702 ctx
->table_id
= old_table_id
;
2710 xlate_group_stats(struct xlate_ctx
*ctx
, struct group_dpif
*group
,
2711 struct ofputil_bucket
*bucket
)
2713 if (ctx
->xin
->resubmit_stats
) {
2714 group_dpif_credit_stats(group
, bucket
, ctx
->xin
->resubmit_stats
);
2716 if (ctx
->xin
->xcache
) {
2717 struct xc_entry
*entry
;
2719 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_GROUP
);
2720 entry
->u
.group
.group
= group_dpif_ref(group
);
2721 entry
->u
.group
.bucket
= bucket
;
2726 xlate_group_bucket(struct xlate_ctx
*ctx
, struct ofputil_bucket
*bucket
)
2728 uint64_t action_list_stub
[1024 / 8];
2729 struct ofpbuf action_list
, action_set
;
2731 ofpbuf_use_const(&action_set
, bucket
->ofpacts
, bucket
->ofpacts_len
);
2732 ofpbuf_use_stub(&action_list
, action_list_stub
, sizeof action_list_stub
);
2734 ofpacts_execute_action_set(&action_list
, &action_set
);
2736 do_xlate_actions(ofpbuf_data(&action_list
), ofpbuf_size(&action_list
), ctx
);
2739 ofpbuf_uninit(&action_set
);
2740 ofpbuf_uninit(&action_list
);
2744 xlate_all_group(struct xlate_ctx
*ctx
, struct group_dpif
*group
)
2746 struct ofputil_bucket
*bucket
;
2747 const struct list
*buckets
;
2748 struct flow old_flow
= ctx
->xin
->flow
;
2750 group_dpif_get_buckets(group
, &buckets
);
2752 LIST_FOR_EACH (bucket
, list_node
, buckets
) {
2753 xlate_group_bucket(ctx
, bucket
);
2754 /* Roll back flow to previous state.
2755 * This is equivalent to cloning the packet for each bucket.
2757 * As a side effect any subsequently applied actions will
2758 * also effectively be applied to a clone of the packet taken
2759 * just before applying the all or indirect group. */
2760 ctx
->xin
->flow
= old_flow
;
2762 xlate_group_stats(ctx
, group
, NULL
);
2766 xlate_ff_group(struct xlate_ctx
*ctx
, struct group_dpif
*group
)
2768 struct ofputil_bucket
*bucket
;
2770 bucket
= group_first_live_bucket(ctx
, group
, 0);
2772 xlate_group_bucket(ctx
, bucket
);
2773 xlate_group_stats(ctx
, group
, bucket
);
2778 xlate_select_group(struct xlate_ctx
*ctx
, struct group_dpif
*group
)
2780 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
2781 struct ofputil_bucket
*bucket
;
2784 basis
= hash_mac(ctx
->xin
->flow
.dl_dst
, 0, 0);
2785 bucket
= group_best_live_bucket(ctx
, group
, basis
);
2787 memset(&wc
->masks
.dl_dst
, 0xff, sizeof wc
->masks
.dl_dst
);
2788 xlate_group_bucket(ctx
, bucket
);
2789 xlate_group_stats(ctx
, group
, bucket
);
2794 xlate_group_action__(struct xlate_ctx
*ctx
, struct group_dpif
*group
)
2796 ctx
->in_group
= true;
2798 switch (group_dpif_get_type(group
)) {
2800 case OFPGT11_INDIRECT
:
2801 xlate_all_group(ctx
, group
);
2803 case OFPGT11_SELECT
:
2804 xlate_select_group(ctx
, group
);
2807 xlate_ff_group(ctx
, group
);
2812 group_dpif_unref(group
);
2814 ctx
->in_group
= false;
2818 xlate_group_resource_check(struct xlate_ctx
*ctx
)
2820 if (!xlate_resubmit_resource_check(ctx
)) {
2822 } else if (ctx
->in_group
) {
2823 /* Prevent nested translation of OpenFlow groups.
2825 * OpenFlow allows this restriction. We enforce this restriction only
2826 * because, with the current architecture, we would otherwise have to
2827 * take a possibly recursive read lock on the ofgroup rwlock, which is
2828 * unsafe given that POSIX allows taking a read lock to block if there
2829 * is a thread blocked on taking the write lock. Other solutions
2830 * without this restriction are also possible, but seem unwarranted
2831 * given the current limited use of groups. */
2832 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 1);
2834 VLOG_ERR_RL(&rl
, "cannot recursively translate OpenFlow group");
2842 xlate_group_action(struct xlate_ctx
*ctx
, uint32_t group_id
)
2844 if (xlate_group_resource_check(ctx
)) {
2845 struct group_dpif
*group
;
2848 got_group
= group_dpif_lookup(ctx
->xbridge
->ofproto
, group_id
, &group
);
2850 xlate_group_action__(ctx
, group
);
2860 xlate_ofpact_resubmit(struct xlate_ctx
*ctx
,
2861 const struct ofpact_resubmit
*resubmit
)
2865 bool may_packet_in
= false;
2866 bool honor_table_miss
= false;
2868 if (ctx
->rule
&& rule_dpif_is_internal(ctx
->rule
)) {
2869 /* Still allow missed packets to be sent to the controller
2870 * if resubmitting from an internal table. */
2871 may_packet_in
= true;
2872 honor_table_miss
= true;
2875 in_port
= resubmit
->in_port
;
2876 if (in_port
== OFPP_IN_PORT
) {
2877 in_port
= ctx
->xin
->flow
.in_port
.ofp_port
;
2880 table_id
= resubmit
->table_id
;
2881 if (table_id
== 255) {
2882 table_id
= ctx
->table_id
;
2885 xlate_table_action(ctx
, in_port
, table_id
, may_packet_in
,
2890 flood_packets(struct xlate_ctx
*ctx
, bool all
)
2892 const struct xport
*xport
;
2894 HMAP_FOR_EACH (xport
, ofp_node
, &ctx
->xbridge
->xports
) {
2895 if (xport
->ofp_port
== ctx
->xin
->flow
.in_port
.ofp_port
) {
2900 compose_output_action__(ctx
, xport
->ofp_port
, false);
2901 } else if (!(xport
->config
& OFPUTIL_PC_NO_FLOOD
)) {
2902 compose_output_action(ctx
, xport
->ofp_port
);
2906 ctx
->xout
->nf_output_iface
= NF_OUT_FLOOD
;
2910 execute_controller_action(struct xlate_ctx
*ctx
, int len
,
2911 enum ofp_packet_in_reason reason
,
2912 uint16_t controller_id
)
2914 struct ofproto_packet_in
*pin
;
2915 struct dpif_packet
*packet
;
2916 struct pkt_metadata md
= PKT_METADATA_INITIALIZER(0);
2918 ctx
->xout
->slow
|= SLOW_CONTROLLER
;
2919 if (!ctx
->xin
->packet
) {
2923 packet
= dpif_packet_clone_from_ofpbuf(ctx
->xin
->packet
);
2925 ctx
->xout
->slow
|= commit_odp_actions(&ctx
->xin
->flow
, &ctx
->base_flow
,
2926 ctx
->xout
->odp_actions
,
2929 odp_execute_actions(NULL
, &packet
, 1, false, &md
,
2930 ofpbuf_data(ctx
->xout
->odp_actions
),
2931 ofpbuf_size(ctx
->xout
->odp_actions
), NULL
);
2933 pin
= xmalloc(sizeof *pin
);
2934 pin
->up
.packet_len
= ofpbuf_size(&packet
->ofpbuf
);
2935 pin
->up
.packet
= ofpbuf_steal_data(&packet
->ofpbuf
);
2936 pin
->up
.reason
= reason
;
2937 pin
->up
.table_id
= ctx
->table_id
;
2938 pin
->up
.cookie
= (ctx
->rule
2939 ? rule_dpif_get_flow_cookie(ctx
->rule
)
2942 flow_get_metadata(&ctx
->xin
->flow
, &pin
->up
.fmd
);
2944 pin
->controller_id
= controller_id
;
2945 pin
->send_len
= len
;
2946 /* If a rule is a table-miss rule then this is
2947 * a table-miss handled by a table-miss rule.
2949 * Else, if rule is internal and has a controller action,
2950 * the later being implied by the rule being processed here,
2951 * then this is a table-miss handled without a table-miss rule.
2953 * Otherwise this is not a table-miss. */
2954 pin
->miss_type
= OFPROTO_PACKET_IN_NO_MISS
;
2956 if (rule_dpif_is_table_miss(ctx
->rule
)) {
2957 pin
->miss_type
= OFPROTO_PACKET_IN_MISS_FLOW
;
2958 } else if (rule_dpif_is_internal(ctx
->rule
)) {
2959 pin
->miss_type
= OFPROTO_PACKET_IN_MISS_WITHOUT_FLOW
;
2962 ofproto_dpif_send_packet_in(ctx
->xbridge
->ofproto
, pin
);
2963 dpif_packet_delete(packet
);
2967 compose_recirculate_action(struct xlate_ctx
*ctx
,
2968 const struct ofpact
*ofpacts_base
,
2969 const struct ofpact
*ofpact_current
,
2970 size_t ofpacts_base_len
)
2974 unsigned ofpacts_len
;
2977 struct ofpbuf ofpacts
;
2981 ofpacts_len
= ofpacts_base_len
-
2982 ((uint8_t *)ofpact_current
- (uint8_t *)ofpacts_base
);
2985 id
= rule_dpif_get_recirc_id(ctx
->rule
);
2987 /* In the case where ctx has no rule then allocate a recirc id.
2988 * The life-cycle of this recirc id is managed by associating it
2989 * with the internal rule that is created to to handle
2990 * recirculation below.
2992 * The known use-case of this is packet_out which
2993 * translates actions without a rule */
2994 id
= ofproto_dpif_alloc_recirc_id(ctx
->xbridge
->ofproto
);
2997 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
2998 VLOG_ERR_RL(&rl
, "Failed to allocate recirculation id");
3002 match_init_catchall(&match
);
3003 match_set_recirc_id(&match
, id
);
3004 ofpbuf_use_const(&ofpacts
, ofpact_current
, ofpacts_len
);
3005 error
= ofproto_dpif_add_internal_flow(ctx
->xbridge
->ofproto
, &match
,
3006 RECIRC_RULE_PRIORITY
,
3007 RECIRC_TIMEOUT
, &ofpacts
, &rule
);
3009 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
3010 VLOG_ERR_RL(&rl
, "Failed to add post recirculation flow %s",
3011 match_to_string(&match
, 0));
3014 /* If ctx has no rule then associate the recirc id, which
3015 * was allocated above, with the internal rule. This allows
3016 * the recirc id to be released when the internal rule times out. */
3018 rule_set_recirc_id(rule
, id
);
3021 ctx
->xout
->slow
|= commit_odp_actions(&ctx
->xin
->flow
, &ctx
->base_flow
,
3022 ctx
->xout
->odp_actions
,
3024 nl_msg_put_u32(ctx
->xout
->odp_actions
, OVS_ACTION_ATTR_RECIRC
, id
);
3028 compose_mpls_push_action(struct xlate_ctx
*ctx
, struct ofpact_push_mpls
*mpls
)
3030 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
3031 struct flow
*flow
= &ctx
->xin
->flow
;
3034 ovs_assert(eth_type_mpls(mpls
->ethertype
));
3036 n
= flow_count_mpls_labels(flow
, wc
);
3038 ctx
->xout
->slow
|= commit_odp_actions(flow
, &ctx
->base_flow
,
3039 ctx
->xout
->odp_actions
,
3041 } else if (n
>= FLOW_MAX_MPLS_LABELS
) {
3042 if (ctx
->xin
->packet
!= NULL
) {
3043 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
3044 VLOG_WARN_RL(&rl
, "bridge %s: dropping packet on which an "
3045 "MPLS push action can't be performed as it would "
3046 "have more MPLS LSEs than the %d supported.",
3047 ctx
->xbridge
->name
, FLOW_MAX_MPLS_LABELS
);
3051 } else if (n
>= ctx
->xbridge
->max_mpls_depth
) {
3052 COVERAGE_INC(xlate_actions_mpls_overflow
);
3053 ctx
->xout
->slow
|= SLOW_ACTION
;
3056 flow_push_mpls(flow
, n
, mpls
->ethertype
, wc
);
3060 compose_mpls_pop_action(struct xlate_ctx
*ctx
, ovs_be16 eth_type
)
3062 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
3063 struct flow
*flow
= &ctx
->xin
->flow
;
3064 int n
= flow_count_mpls_labels(flow
, wc
);
3066 if (flow_pop_mpls(flow
, n
, eth_type
, wc
)) {
3067 if (ctx
->xbridge
->enable_recirc
&& !eth_type_mpls(eth_type
)) {
3068 ctx
->was_mpls
= true;
3070 } else if (n
>= FLOW_MAX_MPLS_LABELS
) {
3071 if (ctx
->xin
->packet
!= NULL
) {
3072 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
3073 VLOG_WARN_RL(&rl
, "bridge %s: dropping packet on which an "
3074 "MPLS pop action can't be performed as it has "
3075 "more MPLS LSEs than the %d supported.",
3076 ctx
->xbridge
->name
, FLOW_MAX_MPLS_LABELS
);
3079 ofpbuf_clear(ctx
->xout
->odp_actions
);
3084 compose_dec_ttl(struct xlate_ctx
*ctx
, struct ofpact_cnt_ids
*ids
)
3086 struct flow
*flow
= &ctx
->xin
->flow
;
3088 if (!is_ip_any(flow
)) {
3092 ctx
->xout
->wc
.masks
.nw_ttl
= 0xff;
3093 if (flow
->nw_ttl
> 1) {
3099 for (i
= 0; i
< ids
->n_controllers
; i
++) {
3100 execute_controller_action(ctx
, UINT16_MAX
, OFPR_INVALID_TTL
,
3104 /* Stop processing for current table. */
3110 compose_set_mpls_label_action(struct xlate_ctx
*ctx
, ovs_be32 label
)
3112 if (eth_type_mpls(ctx
->xin
->flow
.dl_type
)) {
3113 ctx
->xout
->wc
.masks
.mpls_lse
[0] |= htonl(MPLS_LABEL_MASK
);
3114 set_mpls_lse_label(&ctx
->xin
->flow
.mpls_lse
[0], label
);
3119 compose_set_mpls_tc_action(struct xlate_ctx
*ctx
, uint8_t tc
)
3121 if (eth_type_mpls(ctx
->xin
->flow
.dl_type
)) {
3122 ctx
->xout
->wc
.masks
.mpls_lse
[0] |= htonl(MPLS_TC_MASK
);
3123 set_mpls_lse_tc(&ctx
->xin
->flow
.mpls_lse
[0], tc
);
3128 compose_set_mpls_ttl_action(struct xlate_ctx
*ctx
, uint8_t ttl
)
3130 if (eth_type_mpls(ctx
->xin
->flow
.dl_type
)) {
3131 ctx
->xout
->wc
.masks
.mpls_lse
[0] |= htonl(MPLS_TTL_MASK
);
3132 set_mpls_lse_ttl(&ctx
->xin
->flow
.mpls_lse
[0], ttl
);
3137 compose_dec_mpls_ttl_action(struct xlate_ctx
*ctx
)
3139 struct flow
*flow
= &ctx
->xin
->flow
;
3140 uint8_t ttl
= mpls_lse_to_ttl(flow
->mpls_lse
[0]);
3141 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
3143 memset(&wc
->masks
.mpls_lse
, 0xff, sizeof wc
->masks
.mpls_lse
);
3144 if (eth_type_mpls(flow
->dl_type
)) {
3147 set_mpls_lse_ttl(&flow
->mpls_lse
[0], ttl
);
3150 execute_controller_action(ctx
, UINT16_MAX
, OFPR_INVALID_TTL
, 0);
3152 /* Stop processing for current table. */
3161 xlate_output_action(struct xlate_ctx
*ctx
,
3162 ofp_port_t port
, uint16_t max_len
, bool may_packet_in
)
3164 ofp_port_t prev_nf_output_iface
= ctx
->xout
->nf_output_iface
;
3166 ctx
->xout
->nf_output_iface
= NF_OUT_DROP
;
3170 compose_output_action(ctx
, ctx
->xin
->flow
.in_port
.ofp_port
);
3173 xlate_table_action(ctx
, ctx
->xin
->flow
.in_port
.ofp_port
,
3174 0, may_packet_in
, true);
3180 flood_packets(ctx
, false);
3183 flood_packets(ctx
, true);
3185 case OFPP_CONTROLLER
:
3186 execute_controller_action(ctx
, max_len
, OFPR_ACTION
, 0);
3192 if (port
!= ctx
->xin
->flow
.in_port
.ofp_port
) {
3193 compose_output_action(ctx
, port
);
3195 xlate_report(ctx
, "skipping output to input port");
3200 if (prev_nf_output_iface
== NF_OUT_FLOOD
) {
3201 ctx
->xout
->nf_output_iface
= NF_OUT_FLOOD
;
3202 } else if (ctx
->xout
->nf_output_iface
== NF_OUT_DROP
) {
3203 ctx
->xout
->nf_output_iface
= prev_nf_output_iface
;
3204 } else if (prev_nf_output_iface
!= NF_OUT_DROP
&&
3205 ctx
->xout
->nf_output_iface
!= NF_OUT_FLOOD
) {
3206 ctx
->xout
->nf_output_iface
= NF_OUT_MULTI
;
3211 xlate_output_reg_action(struct xlate_ctx
*ctx
,
3212 const struct ofpact_output_reg
*or)
3214 uint64_t port
= mf_get_subfield(&or->src
, &ctx
->xin
->flow
);
3215 if (port
<= UINT16_MAX
) {
3216 union mf_subvalue value
;
3218 memset(&value
, 0xff, sizeof value
);
3219 mf_write_subfield_flow(&or->src
, &value
, &ctx
->xout
->wc
.masks
);
3220 xlate_output_action(ctx
, u16_to_ofp(port
),
3221 or->max_len
, false);
3226 xlate_enqueue_action(struct xlate_ctx
*ctx
,
3227 const struct ofpact_enqueue
*enqueue
)
3229 ofp_port_t ofp_port
= enqueue
->port
;
3230 uint32_t queue_id
= enqueue
->queue
;
3231 uint32_t flow_priority
, priority
;
3234 /* Translate queue to priority. */
3235 error
= dpif_queue_to_priority(ctx
->xbridge
->dpif
, queue_id
, &priority
);
3237 /* Fall back to ordinary output action. */
3238 xlate_output_action(ctx
, enqueue
->port
, 0, false);
3242 /* Check output port. */
3243 if (ofp_port
== OFPP_IN_PORT
) {
3244 ofp_port
= ctx
->xin
->flow
.in_port
.ofp_port
;
3245 } else if (ofp_port
== ctx
->xin
->flow
.in_port
.ofp_port
) {
3249 /* Add datapath actions. */
3250 flow_priority
= ctx
->xin
->flow
.skb_priority
;
3251 ctx
->xin
->flow
.skb_priority
= priority
;
3252 compose_output_action(ctx
, ofp_port
);
3253 ctx
->xin
->flow
.skb_priority
= flow_priority
;
3255 /* Update NetFlow output port. */
3256 if (ctx
->xout
->nf_output_iface
== NF_OUT_DROP
) {
3257 ctx
->xout
->nf_output_iface
= ofp_port
;
3258 } else if (ctx
->xout
->nf_output_iface
!= NF_OUT_FLOOD
) {
3259 ctx
->xout
->nf_output_iface
= NF_OUT_MULTI
;
3264 xlate_set_queue_action(struct xlate_ctx
*ctx
, uint32_t queue_id
)
3266 uint32_t skb_priority
;
3268 if (!dpif_queue_to_priority(ctx
->xbridge
->dpif
, queue_id
, &skb_priority
)) {
3269 ctx
->xin
->flow
.skb_priority
= skb_priority
;
3271 /* Couldn't translate queue to a priority. Nothing to do. A warning
3272 * has already been logged. */
3277 slave_enabled_cb(ofp_port_t ofp_port
, void *xbridge_
)
3279 const struct xbridge
*xbridge
= xbridge_
;
3290 case OFPP_CONTROLLER
: /* Not supported by the bundle action. */
3293 port
= get_ofp_port(xbridge
, ofp_port
);
3294 return port
? port
->may_enable
: false;
3299 xlate_bundle_action(struct xlate_ctx
*ctx
,
3300 const struct ofpact_bundle
*bundle
)
3304 port
= bundle_execute(bundle
, &ctx
->xin
->flow
, &ctx
->xout
->wc
,
3306 CONST_CAST(struct xbridge
*, ctx
->xbridge
));
3307 if (bundle
->dst
.field
) {
3308 nxm_reg_load(&bundle
->dst
, ofp_to_u16(port
), &ctx
->xin
->flow
,
3311 xlate_output_action(ctx
, port
, 0, false);
3316 xlate_learn_action__(struct xlate_ctx
*ctx
, const struct ofpact_learn
*learn
,
3317 struct ofputil_flow_mod
*fm
, struct ofpbuf
*ofpacts
)
3319 learn_execute(learn
, &ctx
->xin
->flow
, fm
, ofpacts
);
3320 if (ctx
->xin
->may_learn
) {
3321 ofproto_dpif_flow_mod(ctx
->xbridge
->ofproto
, fm
);
3326 xlate_learn_action(struct xlate_ctx
*ctx
, const struct ofpact_learn
*learn
)
3328 ctx
->xout
->has_learn
= true;
3329 learn_mask(learn
, &ctx
->xout
->wc
);
3331 if (ctx
->xin
->xcache
) {
3332 struct xc_entry
*entry
;
3334 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_LEARN
);
3335 entry
->u
.learn
.ofproto
= ctx
->xbridge
->ofproto
;
3336 entry
->u
.learn
.fm
= xmalloc(sizeof *entry
->u
.learn
.fm
);
3337 entry
->u
.learn
.ofpacts
= ofpbuf_new(64);
3338 xlate_learn_action__(ctx
, learn
, entry
->u
.learn
.fm
,
3339 entry
->u
.learn
.ofpacts
);
3340 } else if (ctx
->xin
->may_learn
) {
3341 uint64_t ofpacts_stub
[1024 / 8];
3342 struct ofputil_flow_mod fm
;
3343 struct ofpbuf ofpacts
;
3345 ofpbuf_use_stub(&ofpacts
, ofpacts_stub
, sizeof ofpacts_stub
);
3346 xlate_learn_action__(ctx
, learn
, &fm
, &ofpacts
);
3347 ofpbuf_uninit(&ofpacts
);
3352 xlate_fin_timeout__(struct rule_dpif
*rule
, uint16_t tcp_flags
,
3353 uint16_t idle_timeout
, uint16_t hard_timeout
)
3355 if (tcp_flags
& (TCP_FIN
| TCP_RST
)) {
3356 rule_dpif_reduce_timeouts(rule
, idle_timeout
, hard_timeout
);
3361 xlate_fin_timeout(struct xlate_ctx
*ctx
,
3362 const struct ofpact_fin_timeout
*oft
)
3365 xlate_fin_timeout__(ctx
->rule
, ctx
->xin
->tcp_flags
,
3366 oft
->fin_idle_timeout
, oft
->fin_hard_timeout
);
3367 if (ctx
->xin
->xcache
) {
3368 struct xc_entry
*entry
;
3370 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_FIN_TIMEOUT
);
3371 /* XC_RULE already holds a reference on the rule, none is taken
3373 entry
->u
.fin
.rule
= ctx
->rule
;
3374 entry
->u
.fin
.idle
= oft
->fin_idle_timeout
;
3375 entry
->u
.fin
.hard
= oft
->fin_hard_timeout
;
3381 xlate_sample_action(struct xlate_ctx
*ctx
,
3382 const struct ofpact_sample
*os
)
3384 union user_action_cookie cookie
;
3385 /* Scale the probability from 16-bit to 32-bit while representing
3386 * the same percentage. */
3387 uint32_t probability
= (os
->probability
<< 16) | os
->probability
;
3389 if (!ctx
->xbridge
->variable_length_userdata
) {
3390 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 1);
3392 VLOG_ERR_RL(&rl
, "ignoring NXAST_SAMPLE action because datapath "
3393 "lacks support (needs Linux 3.10+ or kernel module from "
3398 ctx
->xout
->slow
|= commit_odp_actions(&ctx
->xin
->flow
, &ctx
->base_flow
,
3399 ctx
->xout
->odp_actions
,
3402 compose_flow_sample_cookie(os
->probability
, os
->collector_set_id
,
3403 os
->obs_domain_id
, os
->obs_point_id
, &cookie
);
3404 compose_sample_action(ctx
->xbridge
, ctx
->xout
->odp_actions
, &ctx
->xin
->flow
,
3405 probability
, &cookie
, sizeof cookie
.flow_sample
,
3410 may_receive(const struct xport
*xport
, struct xlate_ctx
*ctx
)
3412 if (xport
->config
& (is_stp(&ctx
->xin
->flow
)
3413 ? OFPUTIL_PC_NO_RECV_STP
3414 : OFPUTIL_PC_NO_RECV
)) {
3418 /* Only drop packets here if both forwarding and learning are
3419 * disabled. If just learning is enabled, we need to have
3420 * OFPP_NORMAL and the learning action have a look at the packet
3421 * before we can drop it. */
3422 if (!xport_stp_forward_state(xport
) && !xport_stp_learn_state(xport
)) {
3430 xlate_write_actions(struct xlate_ctx
*ctx
, const struct ofpact
*a
)
3432 struct ofpact_nest
*on
= ofpact_get_WRITE_ACTIONS(a
);
3433 ofpbuf_put(&ctx
->action_set
, on
->actions
, ofpact_nest_get_action_len(on
));
3434 ofpact_pad(&ctx
->action_set
);
3438 xlate_action_set(struct xlate_ctx
*ctx
)
3440 uint64_t action_list_stub
[1024 / 64];
3441 struct ofpbuf action_list
;
3443 ofpbuf_use_stub(&action_list
, action_list_stub
, sizeof action_list_stub
);
3444 ofpacts_execute_action_set(&action_list
, &ctx
->action_set
);
3445 do_xlate_actions(ofpbuf_data(&action_list
), ofpbuf_size(&action_list
), ctx
);
3446 ofpbuf_uninit(&action_list
);
3450 ofpact_needs_recirculation_after_mpls(const struct xlate_ctx
*ctx
,
3451 const struct ofpact
*a
)
3453 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
3454 struct flow
*flow
= &ctx
->xin
->flow
;
3459 case OFPACT_CONTROLLER
:
3460 case OFPACT_STRIP_VLAN
:
3461 case OFPACT_SET_VLAN_PCP
:
3462 case OFPACT_SET_VLAN_VID
:
3463 case OFPACT_ENQUEUE
:
3464 case OFPACT_PUSH_VLAN
:
3465 case OFPACT_SET_ETH_SRC
:
3466 case OFPACT_SET_ETH_DST
:
3467 case OFPACT_SET_TUNNEL
:
3468 case OFPACT_SET_QUEUE
:
3469 case OFPACT_POP_QUEUE
:
3470 case OFPACT_POP_MPLS
:
3471 case OFPACT_DEC_MPLS_TTL
:
3472 case OFPACT_SET_MPLS_TTL
:
3473 case OFPACT_SET_MPLS_TC
:
3474 case OFPACT_SET_MPLS_LABEL
:
3476 case OFPACT_OUTPUT_REG
:
3479 case OFPACT_WRITE_METADATA
:
3480 case OFPACT_WRITE_ACTIONS
:
3481 case OFPACT_CLEAR_ACTIONS
:
3485 case OFPACT_SET_IPV4_SRC
:
3486 case OFPACT_SET_IPV4_DST
:
3487 case OFPACT_SET_IP_DSCP
:
3488 case OFPACT_SET_IP_ECN
:
3489 case OFPACT_SET_IP_TTL
:
3490 case OFPACT_SET_L4_SRC_PORT
:
3491 case OFPACT_SET_L4_DST_PORT
:
3492 case OFPACT_RESUBMIT
:
3493 case OFPACT_STACK_PUSH
:
3494 case OFPACT_STACK_POP
:
3495 case OFPACT_DEC_TTL
:
3496 case OFPACT_MULTIPATH
:
3499 case OFPACT_FIN_TIMEOUT
:
3500 case OFPACT_GOTO_TABLE
:
3503 case OFPACT_REG_MOVE
:
3504 return (mf_is_l3_or_higher(ofpact_get_REG_MOVE(a
)->dst
.field
) ||
3505 mf_is_l3_or_higher(ofpact_get_REG_MOVE(a
)->src
.field
));
3507 case OFPACT_REG_LOAD
:
3508 return mf_is_l3_or_higher(ofpact_get_REG_LOAD(a
)->dst
.field
);
3510 case OFPACT_SET_FIELD
:
3511 return mf_is_l3_or_higher(ofpact_get_SET_FIELD(a
)->field
);
3513 case OFPACT_PUSH_MPLS
:
3514 /* Recirculate if it is an IP packet with a zero ttl. This may
3515 * indicate that the packet was previously MPLS and an MPLS pop action
3516 * converted it to IP. In this case recirculating should reveal the IP
3517 * TTL which is used as the basis for a new MPLS LSE. */
3518 return (!flow_count_mpls_labels(flow
, wc
)
3519 && flow
->nw_ttl
== 0
3520 && is_ip_any(flow
));
3527 do_xlate_actions(const struct ofpact
*ofpacts
, size_t ofpacts_len
,
3528 struct xlate_ctx
*ctx
)
3530 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
3531 struct flow
*flow
= &ctx
->xin
->flow
;
3532 const struct ofpact
*a
;
3534 /* dl_type already in the mask, not set below. */
3536 OFPACT_FOR_EACH (a
, ofpacts
, ofpacts_len
) {
3537 struct ofpact_controller
*controller
;
3538 const struct ofpact_metadata
*metadata
;
3539 const struct ofpact_set_field
*set_field
;
3540 const struct mf_field
*mf
;
3546 if (ctx
->was_mpls
&& ofpact_needs_recirculation_after_mpls(ctx
, a
)) {
3547 compose_recirculate_action(ctx
, ofpacts
, a
, ofpacts_len
);
3553 xlate_output_action(ctx
, ofpact_get_OUTPUT(a
)->port
,
3554 ofpact_get_OUTPUT(a
)->max_len
, true);
3558 if (xlate_group_action(ctx
, ofpact_get_GROUP(a
)->group_id
)) {
3563 case OFPACT_CONTROLLER
:
3564 controller
= ofpact_get_CONTROLLER(a
);
3565 execute_controller_action(ctx
, controller
->max_len
,
3567 controller
->controller_id
);
3570 case OFPACT_ENQUEUE
:
3571 xlate_enqueue_action(ctx
, ofpact_get_ENQUEUE(a
));
3574 case OFPACT_SET_VLAN_VID
:
3575 wc
->masks
.vlan_tci
|= htons(VLAN_VID_MASK
| VLAN_CFI
);
3576 if (flow
->vlan_tci
& htons(VLAN_CFI
) ||
3577 ofpact_get_SET_VLAN_VID(a
)->push_vlan_if_needed
) {
3578 flow
->vlan_tci
&= ~htons(VLAN_VID_MASK
);
3579 flow
->vlan_tci
|= (htons(ofpact_get_SET_VLAN_VID(a
)->vlan_vid
)
3584 case OFPACT_SET_VLAN_PCP
:
3585 wc
->masks
.vlan_tci
|= htons(VLAN_PCP_MASK
| VLAN_CFI
);
3586 if (flow
->vlan_tci
& htons(VLAN_CFI
) ||
3587 ofpact_get_SET_VLAN_PCP(a
)->push_vlan_if_needed
) {
3588 flow
->vlan_tci
&= ~htons(VLAN_PCP_MASK
);
3589 flow
->vlan_tci
|= htons((ofpact_get_SET_VLAN_PCP(a
)->vlan_pcp
3590 << VLAN_PCP_SHIFT
) | VLAN_CFI
);
3594 case OFPACT_STRIP_VLAN
:
3595 memset(&wc
->masks
.vlan_tci
, 0xff, sizeof wc
->masks
.vlan_tci
);
3596 flow
->vlan_tci
= htons(0);
3599 case OFPACT_PUSH_VLAN
:
3600 /* XXX 802.1AD(QinQ) */
3601 memset(&wc
->masks
.vlan_tci
, 0xff, sizeof wc
->masks
.vlan_tci
);
3602 flow
->vlan_tci
= htons(VLAN_CFI
);
3605 case OFPACT_SET_ETH_SRC
:
3606 memset(&wc
->masks
.dl_src
, 0xff, sizeof wc
->masks
.dl_src
);
3607 memcpy(flow
->dl_src
, ofpact_get_SET_ETH_SRC(a
)->mac
, ETH_ADDR_LEN
);
3610 case OFPACT_SET_ETH_DST
:
3611 memset(&wc
->masks
.dl_dst
, 0xff, sizeof wc
->masks
.dl_dst
);
3612 memcpy(flow
->dl_dst
, ofpact_get_SET_ETH_DST(a
)->mac
, ETH_ADDR_LEN
);
3615 case OFPACT_SET_IPV4_SRC
:
3616 if (flow
->dl_type
== htons(ETH_TYPE_IP
)) {
3617 memset(&wc
->masks
.nw_src
, 0xff, sizeof wc
->masks
.nw_src
);
3618 flow
->nw_src
= ofpact_get_SET_IPV4_SRC(a
)->ipv4
;
3622 case OFPACT_SET_IPV4_DST
:
3623 if (flow
->dl_type
== htons(ETH_TYPE_IP
)) {
3624 memset(&wc
->masks
.nw_dst
, 0xff, sizeof wc
->masks
.nw_dst
);
3625 flow
->nw_dst
= ofpact_get_SET_IPV4_DST(a
)->ipv4
;
3629 case OFPACT_SET_IP_DSCP
:
3630 if (is_ip_any(flow
)) {
3631 wc
->masks
.nw_tos
|= IP_DSCP_MASK
;
3632 flow
->nw_tos
&= ~IP_DSCP_MASK
;
3633 flow
->nw_tos
|= ofpact_get_SET_IP_DSCP(a
)->dscp
;
3637 case OFPACT_SET_IP_ECN
:
3638 if (is_ip_any(flow
)) {
3639 wc
->masks
.nw_tos
|= IP_ECN_MASK
;
3640 flow
->nw_tos
&= ~IP_ECN_MASK
;
3641 flow
->nw_tos
|= ofpact_get_SET_IP_ECN(a
)->ecn
;
3645 case OFPACT_SET_IP_TTL
:
3646 if (is_ip_any(flow
)) {
3647 wc
->masks
.nw_ttl
= 0xff;
3648 flow
->nw_ttl
= ofpact_get_SET_IP_TTL(a
)->ttl
;
3652 case OFPACT_SET_L4_SRC_PORT
:
3653 if (is_ip_any(flow
)) {
3654 memset(&wc
->masks
.nw_proto
, 0xff, sizeof wc
->masks
.nw_proto
);
3655 memset(&wc
->masks
.tp_src
, 0xff, sizeof wc
->masks
.tp_src
);
3656 flow
->tp_src
= htons(ofpact_get_SET_L4_SRC_PORT(a
)->port
);
3660 case OFPACT_SET_L4_DST_PORT
:
3661 if (is_ip_any(flow
)) {
3662 memset(&wc
->masks
.nw_proto
, 0xff, sizeof wc
->masks
.nw_proto
);
3663 memset(&wc
->masks
.tp_dst
, 0xff, sizeof wc
->masks
.tp_dst
);
3664 flow
->tp_dst
= htons(ofpact_get_SET_L4_DST_PORT(a
)->port
);
3668 case OFPACT_RESUBMIT
:
3669 xlate_ofpact_resubmit(ctx
, ofpact_get_RESUBMIT(a
));
3672 case OFPACT_SET_TUNNEL
:
3673 flow
->tunnel
.tun_id
= htonll(ofpact_get_SET_TUNNEL(a
)->tun_id
);
3676 case OFPACT_SET_QUEUE
:
3677 xlate_set_queue_action(ctx
, ofpact_get_SET_QUEUE(a
)->queue_id
);
3680 case OFPACT_POP_QUEUE
:
3681 flow
->skb_priority
= ctx
->orig_skb_priority
;
3684 case OFPACT_REG_MOVE
:
3685 nxm_execute_reg_move(ofpact_get_REG_MOVE(a
), flow
, wc
);
3688 case OFPACT_REG_LOAD
:
3689 nxm_execute_reg_load(ofpact_get_REG_LOAD(a
), flow
, wc
);
3692 case OFPACT_SET_FIELD
:
3693 set_field
= ofpact_get_SET_FIELD(a
);
3694 mf
= set_field
->field
;
3696 /* Set field action only ever overwrites packet's outermost
3697 * applicable header fields. Do nothing if no header exists. */
3698 if (mf
->id
== MFF_VLAN_VID
) {
3699 wc
->masks
.vlan_tci
|= htons(VLAN_CFI
);
3700 if (!(flow
->vlan_tci
& htons(VLAN_CFI
))) {
3703 } else if ((mf
->id
== MFF_MPLS_LABEL
|| mf
->id
== MFF_MPLS_TC
)
3704 /* 'dl_type' is already unwildcarded. */
3705 && !eth_type_mpls(flow
->dl_type
)) {
3709 mf_mask_field_and_prereqs(mf
, &wc
->masks
);
3710 mf_set_flow_value(mf
, &set_field
->value
, flow
);
3713 case OFPACT_STACK_PUSH
:
3714 nxm_execute_stack_push(ofpact_get_STACK_PUSH(a
), flow
, wc
,
3718 case OFPACT_STACK_POP
:
3719 nxm_execute_stack_pop(ofpact_get_STACK_POP(a
), flow
, wc
,
3723 case OFPACT_PUSH_MPLS
:
3724 compose_mpls_push_action(ctx
, ofpact_get_PUSH_MPLS(a
));
3727 case OFPACT_POP_MPLS
:
3728 compose_mpls_pop_action(ctx
, ofpact_get_POP_MPLS(a
)->ethertype
);
3731 case OFPACT_SET_MPLS_LABEL
:
3732 compose_set_mpls_label_action(
3733 ctx
, ofpact_get_SET_MPLS_LABEL(a
)->label
);
3736 case OFPACT_SET_MPLS_TC
:
3737 compose_set_mpls_tc_action(ctx
, ofpact_get_SET_MPLS_TC(a
)->tc
);
3740 case OFPACT_SET_MPLS_TTL
:
3741 compose_set_mpls_ttl_action(ctx
, ofpact_get_SET_MPLS_TTL(a
)->ttl
);
3744 case OFPACT_DEC_MPLS_TTL
:
3745 if (compose_dec_mpls_ttl_action(ctx
)) {
3750 case OFPACT_DEC_TTL
:
3751 wc
->masks
.nw_ttl
= 0xff;
3752 if (compose_dec_ttl(ctx
, ofpact_get_DEC_TTL(a
))) {
3758 /* Nothing to do. */
3761 case OFPACT_MULTIPATH
:
3762 multipath_execute(ofpact_get_MULTIPATH(a
), flow
, wc
);
3766 xlate_bundle_action(ctx
, ofpact_get_BUNDLE(a
));
3769 case OFPACT_OUTPUT_REG
:
3770 xlate_output_reg_action(ctx
, ofpact_get_OUTPUT_REG(a
));
3774 xlate_learn_action(ctx
, ofpact_get_LEARN(a
));
3781 case OFPACT_FIN_TIMEOUT
:
3782 memset(&wc
->masks
.nw_proto
, 0xff, sizeof wc
->masks
.nw_proto
);
3783 ctx
->xout
->has_fin_timeout
= true;
3784 xlate_fin_timeout(ctx
, ofpact_get_FIN_TIMEOUT(a
));
3787 case OFPACT_CLEAR_ACTIONS
:
3788 ofpbuf_clear(&ctx
->action_set
);
3791 case OFPACT_WRITE_ACTIONS
:
3792 xlate_write_actions(ctx
, a
);
3795 case OFPACT_WRITE_METADATA
:
3796 metadata
= ofpact_get_WRITE_METADATA(a
);
3797 flow
->metadata
&= ~metadata
->mask
;
3798 flow
->metadata
|= metadata
->metadata
& metadata
->mask
;
3802 /* Not implemented yet. */
3805 case OFPACT_GOTO_TABLE
: {
3806 struct ofpact_goto_table
*ogt
= ofpact_get_GOTO_TABLE(a
);
3808 /* Allow ctx->table_id == TBL_INTERNAL, which will be greater
3809 * than ogt->table_id. This is to allow goto_table actions that
3810 * triggered recirculation: ctx->table_id will be TBL_INTERNAL
3811 * after recirculation. */
3812 ovs_assert(ctx
->table_id
== TBL_INTERNAL
3813 || ctx
->table_id
< ogt
->table_id
);
3814 xlate_table_action(ctx
, ctx
->xin
->flow
.in_port
.ofp_port
,
3815 ogt
->table_id
, true, true);
3820 xlate_sample_action(ctx
, ofpact_get_SAMPLE(a
));
3827 xlate_in_init(struct xlate_in
*xin
, struct ofproto_dpif
*ofproto
,
3828 const struct flow
*flow
, ofp_port_t in_port
,
3829 struct rule_dpif
*rule
, uint16_t tcp_flags
,
3830 const struct ofpbuf
*packet
)
3832 xin
->ofproto
= ofproto
;
3834 xin
->flow
.in_port
.ofp_port
= in_port
;
3835 xin
->packet
= packet
;
3836 xin
->may_learn
= packet
!= NULL
;
3839 xin
->ofpacts
= NULL
;
3840 xin
->ofpacts_len
= 0;
3841 xin
->tcp_flags
= tcp_flags
;
3842 xin
->resubmit_hook
= NULL
;
3843 xin
->report_hook
= NULL
;
3844 xin
->resubmit_stats
= NULL
;
3845 xin
->skip_wildcards
= false;
3846 xin
->odp_actions
= NULL
;
3850 xlate_out_uninit(struct xlate_out
*xout
)
3852 if (xout
&& xout
->odp_actions
== &xout
->odp_actions_buf
) {
3853 ofpbuf_uninit(xout
->odp_actions
);
3857 /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts'
3858 * into datapath actions, using 'ctx', and discards the datapath actions. */
3860 xlate_actions_for_side_effects(struct xlate_in
*xin
)
3862 struct xlate_out xout
;
3864 xlate_actions(xin
, &xout
);
3865 xlate_out_uninit(&xout
);
3869 xlate_report(struct xlate_ctx
*ctx
, const char *s
)
3871 if (ctx
->xin
->report_hook
) {
3872 ctx
->xin
->report_hook(ctx
->xin
, s
, ctx
->recurse
);
3877 xlate_out_copy(struct xlate_out
*dst
, const struct xlate_out
*src
)
3880 dst
->slow
= src
->slow
;
3881 dst
->has_learn
= src
->has_learn
;
3882 dst
->has_normal
= src
->has_normal
;
3883 dst
->has_fin_timeout
= src
->has_fin_timeout
;
3884 dst
->nf_output_iface
= src
->nf_output_iface
;
3885 dst
->mirrors
= src
->mirrors
;
3887 dst
->odp_actions
= &dst
->odp_actions_buf
;
3888 ofpbuf_use_stub(dst
->odp_actions
, dst
->odp_actions_stub
,
3889 sizeof dst
->odp_actions_stub
);
3890 ofpbuf_put(dst
->odp_actions
, ofpbuf_data(src
->odp_actions
),
3891 ofpbuf_size(src
->odp_actions
));
3894 static struct skb_priority_to_dscp
*
3895 get_skb_priority(const struct xport
*xport
, uint32_t skb_priority
)
3897 struct skb_priority_to_dscp
*pdscp
;
3900 hash
= hash_int(skb_priority
, 0);
3901 HMAP_FOR_EACH_IN_BUCKET (pdscp
, hmap_node
, hash
, &xport
->skb_priorities
) {
3902 if (pdscp
->skb_priority
== skb_priority
) {
3910 dscp_from_skb_priority(const struct xport
*xport
, uint32_t skb_priority
,
3913 struct skb_priority_to_dscp
*pdscp
= get_skb_priority(xport
, skb_priority
);
3914 *dscp
= pdscp
? pdscp
->dscp
: 0;
3915 return pdscp
!= NULL
;
3919 clear_skb_priorities(struct xport
*xport
)
3921 struct skb_priority_to_dscp
*pdscp
, *next
;
3923 HMAP_FOR_EACH_SAFE (pdscp
, next
, hmap_node
, &xport
->skb_priorities
) {
3924 hmap_remove(&xport
->skb_priorities
, &pdscp
->hmap_node
);
3930 actions_output_to_local_port(const struct xlate_ctx
*ctx
)
3932 odp_port_t local_odp_port
= ofp_port_to_odp_port(ctx
->xbridge
, OFPP_LOCAL
);
3933 const struct nlattr
*a
;
3936 NL_ATTR_FOR_EACH_UNSAFE (a
, left
, ofpbuf_data(ctx
->xout
->odp_actions
),
3937 ofpbuf_size(ctx
->xout
->odp_actions
)) {
3938 if (nl_attr_type(a
) == OVS_ACTION_ATTR_OUTPUT
3939 && nl_attr_get_odp_port(a
) == local_odp_port
) {
3946 /* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts'
3947 * into datapath actions in 'odp_actions', using 'ctx'.
3949 * The caller must take responsibility for eventually freeing 'xout', with
3950 * xlate_out_uninit(). */
3952 xlate_actions(struct xlate_in
*xin
, struct xlate_out
*xout
)
3954 struct xlate_cfg
*xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
3955 struct flow_wildcards
*wc
= &xout
->wc
;
3956 struct flow
*flow
= &xin
->flow
;
3957 struct rule_dpif
*rule
= NULL
;
3959 const struct rule_actions
*actions
= NULL
;
3960 enum slow_path_reason special
;
3961 const struct ofpact
*ofpacts
;
3962 struct xport
*in_port
;
3963 struct flow orig_flow
;
3964 struct xlate_ctx ctx
;
3969 COVERAGE_INC(xlate_actions
);
3971 /* Flow initialization rules:
3972 * - 'base_flow' must match the kernel's view of the packet at the
3973 * time that action processing starts. 'flow' represents any
3974 * transformations we wish to make through actions.
3975 * - By default 'base_flow' and 'flow' are the same since the input
3976 * packet matches the output before any actions are applied.
3977 * - When using VLAN splinters, 'base_flow''s VLAN is set to the value
3978 * of the received packet as seen by the kernel. If we later output
3979 * to another device without any modifications this will cause us to
3980 * insert a new tag since the original one was stripped off by the
3982 * - Tunnel metadata as received is retained in 'flow'. This allows
3983 * tunnel metadata matching also in later tables.
3984 * Since a kernel action for setting the tunnel metadata will only be
3985 * generated with actual tunnel output, changing the tunnel metadata
3986 * values in 'flow' (such as tun_id) will only have effect with a later
3987 * tunnel output action.
3988 * - Tunnel 'base_flow' is completely cleared since that is what the
3989 * kernel does. If we wish to maintain the original values an action
3990 * needs to be generated. */
3995 ctx
.xout
->has_learn
= false;
3996 ctx
.xout
->has_normal
= false;
3997 ctx
.xout
->has_fin_timeout
= false;
3998 ctx
.xout
->nf_output_iface
= NF_OUT_DROP
;
3999 ctx
.xout
->mirrors
= 0;
4001 xout
->odp_actions
= xin
->odp_actions
;
4002 if (!xout
->odp_actions
) {
4003 xout
->odp_actions
= &xout
->odp_actions_buf
;
4004 ofpbuf_use_stub(xout
->odp_actions
, xout
->odp_actions_stub
,
4005 sizeof xout
->odp_actions_stub
);
4007 ofpbuf_reserve(xout
->odp_actions
, NL_A_U32_SIZE
);
4009 ctx
.xbridge
= xbridge_lookup(xcfg
, xin
->ofproto
);
4014 ctx
.rule
= xin
->rule
;
4016 ctx
.base_flow
= *flow
;
4017 memset(&ctx
.base_flow
.tunnel
, 0, sizeof ctx
.base_flow
.tunnel
);
4018 ctx
.orig_tunnel_ip_dst
= flow
->tunnel
.ip_dst
;
4020 flow_wildcards_init_catchall(wc
);
4021 memset(&wc
->masks
.in_port
, 0xff, sizeof wc
->masks
.in_port
);
4022 memset(&wc
->masks
.skb_priority
, 0xff, sizeof wc
->masks
.skb_priority
);
4023 memset(&wc
->masks
.dl_type
, 0xff, sizeof wc
->masks
.dl_type
);
4024 if (is_ip_any(flow
)) {
4025 wc
->masks
.nw_frag
|= FLOW_NW_FRAG_MASK
;
4027 is_icmp
= is_icmpv4(flow
) || is_icmpv6(flow
);
4029 tnl_may_send
= tnl_xlate_init(&ctx
.base_flow
, flow
, wc
);
4030 if (ctx
.xbridge
->netflow
) {
4031 netflow_mask_wc(flow
, wc
);
4036 ctx
.in_group
= false;
4037 ctx
.orig_skb_priority
= flow
->skb_priority
;
4040 ctx
.use_recirc
= false;
4041 ctx
.was_mpls
= false;
4043 if (!xin
->ofpacts
&& !ctx
.rule
) {
4044 ctx
.table_id
= rule_dpif_lookup(ctx
.xbridge
->ofproto
, flow
,
4045 !xin
->skip_wildcards
? wc
: NULL
,
4046 &rule
, ctx
.xin
->xcache
!= NULL
,
4047 ctx
.xin
->resubmit_stats
);
4048 if (ctx
.xin
->resubmit_stats
) {
4049 rule_dpif_credit_stats(rule
, ctx
.xin
->resubmit_stats
);
4051 if (ctx
.xin
->xcache
) {
4052 struct xc_entry
*entry
;
4054 entry
= xlate_cache_add_entry(ctx
.xin
->xcache
, XC_RULE
);
4055 entry
->u
.rule
= rule
;
4059 xout
->fail_open
= ctx
.rule
&& rule_dpif_is_fail_open(ctx
.rule
);
4062 ofpacts
= xin
->ofpacts
;
4063 ofpacts_len
= xin
->ofpacts_len
;
4064 } else if (ctx
.rule
) {
4065 actions
= rule_dpif_get_actions(ctx
.rule
);
4066 ofpacts
= actions
->ofpacts
;
4067 ofpacts_len
= actions
->ofpacts_len
;
4072 ofpbuf_use_stub(&ctx
.stack
, ctx
.init_stack
, sizeof ctx
.init_stack
);
4073 ofpbuf_use_stub(&ctx
.action_set
,
4074 ctx
.action_set_stub
, sizeof ctx
.action_set_stub
);
4076 if (mbridge_has_mirrors(ctx
.xbridge
->mbridge
)) {
4077 /* Do this conditionally because the copy is expensive enough that it
4078 * shows up in profiles. */
4082 if (flow
->nw_frag
& FLOW_NW_FRAG_ANY
) {
4083 switch (ctx
.xbridge
->frag
) {
4084 case OFPC_FRAG_NORMAL
:
4085 /* We must pretend that transport ports are unavailable. */
4086 flow
->tp_src
= ctx
.base_flow
.tp_src
= htons(0);
4087 flow
->tp_dst
= ctx
.base_flow
.tp_dst
= htons(0);
4090 case OFPC_FRAG_DROP
:
4093 case OFPC_FRAG_REASM
:
4096 case OFPC_FRAG_NX_MATCH
:
4097 /* Nothing to do. */
4100 case OFPC_INVALID_TTL_TO_CONTROLLER
:
4105 in_port
= get_ofp_port(ctx
.xbridge
, flow
->in_port
.ofp_port
);
4106 if (in_port
&& in_port
->is_tunnel
) {
4107 if (ctx
.xin
->resubmit_stats
) {
4108 netdev_vport_inc_rx(in_port
->netdev
, ctx
.xin
->resubmit_stats
);
4110 bfd_account_rx(in_port
->bfd
, ctx
.xin
->resubmit_stats
);
4113 if (ctx
.xin
->xcache
) {
4114 struct xc_entry
*entry
;
4116 entry
= xlate_cache_add_entry(ctx
.xin
->xcache
, XC_NETDEV
);
4117 entry
->u
.dev
.rx
= netdev_ref(in_port
->netdev
);
4118 entry
->u
.dev
.bfd
= bfd_ref(in_port
->bfd
);
4122 special
= process_special(&ctx
, flow
, in_port
, ctx
.xin
->packet
);
4124 ctx
.xout
->slow
|= special
;
4126 size_t sample_actions_len
;
4128 if (flow
->in_port
.ofp_port
4129 != vsp_realdev_to_vlandev(ctx
.xbridge
->ofproto
,
4130 flow
->in_port
.ofp_port
,
4132 ctx
.base_flow
.vlan_tci
= 0;
4135 add_sflow_action(&ctx
);
4136 add_ipfix_action(&ctx
);
4137 sample_actions_len
= ofpbuf_size(ctx
.xout
->odp_actions
);
4139 if (tnl_may_send
&& (!in_port
|| may_receive(in_port
, &ctx
))) {
4140 do_xlate_actions(ofpacts
, ofpacts_len
, &ctx
);
4142 /* We've let OFPP_NORMAL and the learning action look at the
4143 * packet, so drop it now if forwarding is disabled. */
4144 if (in_port
&& !xport_stp_forward_state(in_port
)) {
4145 ofpbuf_set_size(ctx
.xout
->odp_actions
, sample_actions_len
);
4149 if (ofpbuf_size(&ctx
.action_set
)) {
4150 xlate_action_set(&ctx
);
4153 if (ctx
.xbridge
->has_in_band
4154 && in_band_must_output_to_local_port(flow
)
4155 && !actions_output_to_local_port(&ctx
)) {
4156 compose_output_action(&ctx
, OFPP_LOCAL
);
4159 fix_sflow_action(&ctx
);
4161 if (mbridge_has_mirrors(ctx
.xbridge
->mbridge
)) {
4162 add_mirror_actions(&ctx
, &orig_flow
);
4166 if (nl_attr_oversized(ofpbuf_size(ctx
.xout
->odp_actions
))) {
4167 /* These datapath actions are too big for a Netlink attribute, so we
4168 * can't hand them to the kernel directly. dpif_execute() can execute
4169 * them one by one with help, so just mark the result as SLOW_ACTION to
4170 * prevent the flow from being installed. */
4171 COVERAGE_INC(xlate_actions_oversize
);
4172 ctx
.xout
->slow
|= SLOW_ACTION
;
4175 if (mbridge_has_mirrors(ctx
.xbridge
->mbridge
)) {
4176 if (ctx
.xin
->resubmit_stats
) {
4177 mirror_update_stats(ctx
.xbridge
->mbridge
, xout
->mirrors
,
4178 ctx
.xin
->resubmit_stats
->n_packets
,
4179 ctx
.xin
->resubmit_stats
->n_bytes
);
4181 if (ctx
.xin
->xcache
) {
4182 struct xc_entry
*entry
;
4184 entry
= xlate_cache_add_entry(ctx
.xin
->xcache
, XC_MIRROR
);
4185 entry
->u
.mirror
.mbridge
= mbridge_ref(ctx
.xbridge
->mbridge
);
4186 entry
->u
.mirror
.mirrors
= xout
->mirrors
;
4190 if (ctx
.xbridge
->netflow
) {
4191 /* Only update netflow if we don't have controller flow. We don't
4192 * report NetFlow expiration messages for such facets because they
4193 * are just part of the control logic for the network, not real
4195 if (ofpacts_len
== 0
4196 || ofpacts
->type
!= OFPACT_CONTROLLER
4197 || ofpact_next(ofpacts
) < ofpact_end(ofpacts
, ofpacts_len
)) {
4198 if (ctx
.xin
->resubmit_stats
) {
4199 netflow_flow_update(ctx
.xbridge
->netflow
, flow
,
4200 xout
->nf_output_iface
,
4201 ctx
.xin
->resubmit_stats
);
4203 if (ctx
.xin
->xcache
) {
4204 struct xc_entry
*entry
;
4206 entry
= xlate_cache_add_entry(ctx
.xin
->xcache
, XC_NETFLOW
);
4207 entry
->u
.nf
.netflow
= netflow_ref(ctx
.xbridge
->netflow
);
4208 entry
->u
.nf
.flow
= xmemdup(flow
, sizeof *flow
);
4209 entry
->u
.nf
.iface
= xout
->nf_output_iface
;
4214 ofpbuf_uninit(&ctx
.stack
);
4215 ofpbuf_uninit(&ctx
.action_set
);
4217 /* Clear the metadata and register wildcard masks, because we won't
4218 * use non-header fields as part of the cache. */
4219 flow_wildcards_clear_non_packet_fields(wc
);
4221 /* ICMPv4 and ICMPv6 have 8-bit "type" and "code" fields. struct flow uses
4222 * the low 8 bits of the 16-bit tp_src and tp_dst members to represent
4223 * these fields. The datapath interface, on the other hand, represents
4224 * them with just 8 bits each. This means that if the high 8 bits of the
4225 * masks for these fields somehow become set, then they will get chopped
4226 * off by a round trip through the datapath, and revalidation will spot
4227 * that as an inconsistency and delete the flow. Avoid the problem here by
4228 * making sure that only the low 8 bits of either field can be unwildcarded
4232 wc
->masks
.tp_src
&= htons(UINT8_MAX
);
4233 wc
->masks
.tp_dst
&= htons(UINT8_MAX
);
4237 /* Sends 'packet' out 'ofport'.
4238 * May modify 'packet'.
4239 * Returns 0 if successful, otherwise a positive errno value. */
4241 xlate_send_packet(const struct ofport_dpif
*ofport
, struct ofpbuf
*packet
)
4243 struct xlate_cfg
*xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
4244 struct xport
*xport
;
4245 struct ofpact_output output
;
4248 ofpact_init(&output
.ofpact
, OFPACT_OUTPUT
, sizeof output
);
4249 /* Use OFPP_NONE as the in_port to avoid special packet processing. */
4250 flow_extract(packet
, NULL
, &flow
);
4251 flow
.in_port
.ofp_port
= OFPP_NONE
;
4253 xport
= xport_lookup(xcfg
, ofport
);
4257 output
.port
= xport
->ofp_port
;
4260 return ofproto_dpif_execute_actions(xport
->xbridge
->ofproto
, &flow
, NULL
,
4261 &output
.ofpact
, sizeof output
,
4265 struct xlate_cache
*
4266 xlate_cache_new(void)
4268 struct xlate_cache
*xcache
= xmalloc(sizeof *xcache
);
4270 ofpbuf_init(&xcache
->entries
, 512);
4274 static struct xc_entry
*
4275 xlate_cache_add_entry(struct xlate_cache
*xcache
, enum xc_type type
)
4277 struct xc_entry
*entry
;
4279 entry
= ofpbuf_put_zeros(&xcache
->entries
, sizeof *entry
);
4286 xlate_cache_netdev(struct xc_entry
*entry
, const struct dpif_flow_stats
*stats
)
4288 if (entry
->u
.dev
.tx
) {
4289 netdev_vport_inc_tx(entry
->u
.dev
.tx
, stats
);
4291 if (entry
->u
.dev
.rx
) {
4292 netdev_vport_inc_rx(entry
->u
.dev
.rx
, stats
);
4294 if (entry
->u
.dev
.bfd
) {
4295 bfd_account_rx(entry
->u
.dev
.bfd
, stats
);
4300 xlate_cache_normal(struct ofproto_dpif
*ofproto
, struct flow
*flow
, int vlan
)
4302 struct xlate_cfg
*xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
4303 struct xbridge
*xbridge
;
4304 struct xbundle
*xbundle
;
4305 struct flow_wildcards wc
;
4307 xbridge
= xbridge_lookup(xcfg
, ofproto
);
4312 xbundle
= lookup_input_bundle(xbridge
, flow
->in_port
.ofp_port
, false,
4318 update_learning_table(xbridge
, flow
, &wc
, vlan
, xbundle
);
4321 /* Push stats and perform side effects of flow translation. */
4323 xlate_push_stats(struct xlate_cache
*xcache
, bool may_learn
,
4324 const struct dpif_flow_stats
*stats
)
4326 struct xc_entry
*entry
;
4327 struct ofpbuf entries
= xcache
->entries
;
4329 XC_ENTRY_FOR_EACH (entry
, entries
, xcache
) {
4330 switch (entry
->type
) {
4332 rule_dpif_credit_stats(entry
->u
.rule
, stats
);
4335 bond_account(entry
->u
.bond
.bond
, entry
->u
.bond
.flow
,
4336 entry
->u
.bond
.vid
, stats
->n_bytes
);
4339 xlate_cache_netdev(entry
, stats
);
4342 netflow_flow_update(entry
->u
.nf
.netflow
, entry
->u
.nf
.flow
,
4343 entry
->u
.nf
.iface
, stats
);
4346 mirror_update_stats(entry
->u
.mirror
.mbridge
,
4347 entry
->u
.mirror
.mirrors
,
4348 stats
->n_packets
, stats
->n_bytes
);
4352 ofproto_dpif_flow_mod(entry
->u
.learn
.ofproto
,
4357 xlate_cache_normal(entry
->u
.normal
.ofproto
, entry
->u
.normal
.flow
,
4358 entry
->u
.normal
.vlan
);
4360 case XC_FIN_TIMEOUT
:
4361 xlate_fin_timeout__(entry
->u
.fin
.rule
, stats
->tcp_flags
,
4362 entry
->u
.fin
.idle
, entry
->u
.fin
.hard
);
4365 group_dpif_credit_stats(entry
->u
.group
.group
, entry
->u
.group
.bucket
,
4375 xlate_dev_unref(struct xc_entry
*entry
)
4377 if (entry
->u
.dev
.tx
) {
4378 netdev_close(entry
->u
.dev
.tx
);
4380 if (entry
->u
.dev
.rx
) {
4381 netdev_close(entry
->u
.dev
.rx
);
4383 if (entry
->u
.dev
.bfd
) {
4384 bfd_unref(entry
->u
.dev
.bfd
);
4389 xlate_cache_clear_netflow(struct netflow
*netflow
, struct flow
*flow
)
4391 netflow_flow_clear(netflow
, flow
);
4392 netflow_unref(netflow
);
4397 xlate_cache_clear(struct xlate_cache
*xcache
)
4399 struct xc_entry
*entry
;
4400 struct ofpbuf entries
;
4406 XC_ENTRY_FOR_EACH (entry
, entries
, xcache
) {
4407 switch (entry
->type
) {
4409 rule_dpif_unref(entry
->u
.rule
);
4412 free(entry
->u
.bond
.flow
);
4413 bond_unref(entry
->u
.bond
.bond
);
4416 xlate_dev_unref(entry
);
4419 xlate_cache_clear_netflow(entry
->u
.nf
.netflow
, entry
->u
.nf
.flow
);
4422 mbridge_unref(entry
->u
.mirror
.mbridge
);
4425 free(entry
->u
.learn
.fm
);
4426 ofpbuf_delete(entry
->u
.learn
.ofpacts
);
4429 free(entry
->u
.normal
.flow
);
4431 case XC_FIN_TIMEOUT
:
4432 /* 'u.fin.rule' is always already held as a XC_RULE, which
4433 * has already released it's reference above. */
4436 group_dpif_unref(entry
->u
.group
.group
);
4443 ofpbuf_clear(&xcache
->entries
);
4447 xlate_cache_delete(struct xlate_cache
*xcache
)
4449 xlate_cache_clear(xcache
);
4450 ofpbuf_uninit(&xcache
->entries
);