1 /* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License. */
17 #include "ofproto/ofproto-dpif-xlate.h"
25 #include "byte-order.h"
30 #include "dynamic-string.h"
35 #include "mac-learning.h"
36 #include "meta-flow.h"
37 #include "multipath.h"
38 #include "netdev-vport.h"
41 #include "odp-execute.h"
42 #include "ofp-actions.h"
43 #include "ofproto/ofproto-dpif-ipfix.h"
44 #include "ofproto/ofproto-dpif-mirror.h"
45 #include "ofproto/ofproto-dpif-monitor.h"
46 #include "ofproto/ofproto-dpif-sflow.h"
47 #include "ofproto/ofproto-dpif.h"
48 #include "ofproto/ofproto-provider.h"
52 COVERAGE_DEFINE(xlate_actions
);
53 COVERAGE_DEFINE(xlate_actions_oversize
);
54 COVERAGE_DEFINE(xlate_actions_mpls_overflow
);
56 VLOG_DEFINE_THIS_MODULE(ofproto_dpif_xlate
);
58 /* Maximum depth of flow table recursion (due to resubmit actions) in a
59 * flow translation. */
60 #define MAX_RESUBMIT_RECURSION 64
61 #define MAX_INTERNAL_RESUBMITS 1 /* Max resbmits allowed using rules in
64 /* Maximum number of resubmit actions in a flow translation, whether they are
65 * recursive or not. */
66 #define MAX_RESUBMITS (MAX_RESUBMIT_RECURSION * MAX_RESUBMIT_RECURSION)
68 struct ovs_rwlock xlate_rwlock
= OVS_RWLOCK_INITIALIZER
;
71 struct hmap_node hmap_node
; /* Node in global 'xbridges' map. */
72 struct ofproto_dpif
*ofproto
; /* Key in global 'xbridges' map. */
74 struct list xbundles
; /* Owned xbundles. */
75 struct hmap xports
; /* Indexed by ofp_port. */
77 char *name
; /* Name used in log messages. */
78 struct dpif
*dpif
; /* Datapath interface. */
79 struct mac_learning
*ml
; /* Mac learning handle. */
80 struct mbridge
*mbridge
; /* Mirroring. */
81 struct dpif_sflow
*sflow
; /* SFlow handle, or null. */
82 struct dpif_ipfix
*ipfix
; /* Ipfix handle, or null. */
83 struct netflow
*netflow
; /* Netflow handle, or null. */
84 struct stp
*stp
; /* STP or null if disabled. */
86 /* Special rules installed by ofproto-dpif. */
87 struct rule_dpif
*miss_rule
;
88 struct rule_dpif
*no_packet_in_rule
;
90 enum ofp_config_flags frag
; /* Fragmentation handling. */
91 bool has_in_band
; /* Bridge has in band control? */
92 bool forward_bpdu
; /* Bridge forwards STP BPDUs? */
94 /* True if the datapath supports recirculation. */
97 /* True if the datapath supports variable-length
98 * OVS_USERSPACE_ATTR_USERDATA in OVS_ACTION_ATTR_USERSPACE actions.
99 * False if the datapath supports only 8-byte (or shorter) userdata. */
100 bool variable_length_userdata
;
102 /* Number of MPLS label stack entries that the datapath supports
104 size_t max_mpls_depth
;
108 struct hmap_node hmap_node
; /* In global 'xbundles' map. */
109 struct ofbundle
*ofbundle
; /* Key in global 'xbundles' map. */
111 struct list list_node
; /* In parent 'xbridges' list. */
112 struct xbridge
*xbridge
; /* Parent xbridge. */
114 struct list xports
; /* Contains "struct xport"s. */
116 char *name
; /* Name used in log messages. */
117 struct bond
*bond
; /* Nonnull iff more than one port. */
118 struct lacp
*lacp
; /* LACP handle or null. */
120 enum port_vlan_mode vlan_mode
; /* VLAN mode. */
121 int vlan
; /* -1=trunk port, else a 12-bit VLAN ID. */
122 unsigned long *trunks
; /* Bitmap of trunked VLANs, if 'vlan' == -1.
123 * NULL if all VLANs are trunked. */
124 bool use_priority_tags
; /* Use 802.1p tag for frames in VLAN 0? */
125 bool floodable
; /* No port has OFPUTIL_PC_NO_FLOOD set? */
129 struct hmap_node hmap_node
; /* Node in global 'xports' map. */
130 struct ofport_dpif
*ofport
; /* Key in global 'xports map. */
132 struct hmap_node ofp_node
; /* Node in parent xbridge 'xports' map. */
133 ofp_port_t ofp_port
; /* Key in parent xbridge 'xports' map. */
135 odp_port_t odp_port
; /* Datapath port number or ODPP_NONE. */
137 struct list bundle_node
; /* In parent xbundle (if it exists). */
138 struct xbundle
*xbundle
; /* Parent xbundle or null. */
140 struct netdev
*netdev
; /* 'ofport''s netdev. */
142 struct xbridge
*xbridge
; /* Parent bridge. */
143 struct xport
*peer
; /* Patch port peer or null. */
145 enum ofputil_port_config config
; /* OpenFlow port configuration. */
146 enum ofputil_port_state state
; /* OpenFlow port state. */
147 int stp_port_no
; /* STP port number or -1 if not in use. */
149 struct hmap skb_priorities
; /* Map of 'skb_priority_to_dscp's. */
151 bool may_enable
; /* May be enabled in bonds. */
152 bool is_tunnel
; /* Is a tunnel port. */
154 struct cfm
*cfm
; /* CFM handle or null. */
155 struct bfd
*bfd
; /* BFD handle or null. */
159 struct xlate_in
*xin
;
160 struct xlate_out
*xout
;
162 const struct xbridge
*xbridge
;
164 /* Flow at the last commit. */
165 struct flow base_flow
;
167 /* Tunnel IP destination address as received. This is stored separately
168 * as the base_flow.tunnel is cleared on init to reflect the datapath
169 * behavior. Used to make sure not to send tunneled output to ourselves,
170 * which might lead to an infinite loop. This could happen easily
171 * if a tunnel is marked as 'ip_remote=flow', and the flow does not
172 * actually set the tun_dst field. */
173 ovs_be32 orig_tunnel_ip_dst
;
175 /* Stack for the push and pop actions. Each stack element is of type
176 * "union mf_subvalue". */
177 union mf_subvalue init_stack
[1024 / sizeof(union mf_subvalue
)];
180 /* The rule that we are currently translating, or NULL. */
181 struct rule_dpif
*rule
;
183 /* Resubmit statistics, via xlate_table_action(). */
184 int recurse
; /* Current resubmit nesting depth. */
185 int resubmits
; /* Total number of resubmits. */
186 bool in_group
; /* Currently translating ofgroup, if true. */
188 uint32_t orig_skb_priority
; /* Priority when packet arrived. */
189 uint8_t table_id
; /* OpenFlow table ID where flow was found. */
190 uint32_t sflow_n_outputs
; /* Number of output ports. */
191 odp_port_t sflow_odp_port
; /* Output port for composing sFlow action. */
192 uint16_t user_cookie_offset
;/* Used for user_action_cookie fixup. */
193 bool exit
; /* No further actions should be processed. */
195 /* OpenFlow 1.1+ action set.
197 * 'action_set' accumulates "struct ofpact"s added by OFPACT_WRITE_ACTIONS.
198 * When translation is otherwise complete, ofpacts_execute_action_set()
199 * converts it to a set of "struct ofpact"s that can be translated into
200 * datapath actions. */
201 struct ofpbuf action_set
; /* Action set. */
202 uint64_t action_set_stub
[1024 / 8];
205 /* A controller may use OFPP_NONE as the ingress port to indicate that
206 * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for
207 * when an input bundle is needed for validation (e.g., mirroring or
208 * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have
209 * any 'port' structs, so care must be taken when dealing with it. */
210 static struct xbundle ofpp_none_bundle
= {
212 .vlan_mode
= PORT_VLAN_TRUNK
215 /* Node in 'xport''s 'skb_priorities' map. Used to maintain a map from
216 * 'priority' (the datapath's term for QoS queue) to the dscp bits which all
217 * traffic egressing the 'ofport' with that priority should be marked with. */
218 struct skb_priority_to_dscp
{
219 struct hmap_node hmap_node
; /* Node in 'ofport_dpif''s 'skb_priorities'. */
220 uint32_t skb_priority
; /* Priority of this queue (see struct flow). */
222 uint8_t dscp
; /* DSCP bits to mark outgoing traffic with. */
225 static struct hmap xbridges
= HMAP_INITIALIZER(&xbridges
);
226 static struct hmap xbundles
= HMAP_INITIALIZER(&xbundles
);
227 static struct hmap xports
= HMAP_INITIALIZER(&xports
);
229 static bool may_receive(const struct xport
*, struct xlate_ctx
*);
230 static void do_xlate_actions(const struct ofpact
*, size_t ofpacts_len
,
232 static void xlate_actions__(struct xlate_in
*, struct xlate_out
*)
233 OVS_REQ_RDLOCK(xlate_rwlock
);
234 static void xlate_normal(struct xlate_ctx
*);
235 static void xlate_report(struct xlate_ctx
*, const char *);
236 static void xlate_table_action(struct xlate_ctx
*, ofp_port_t in_port
,
237 uint8_t table_id
, bool may_packet_in
,
238 bool honor_table_miss
);
239 static bool input_vid_is_valid(uint16_t vid
, struct xbundle
*, bool warn
);
240 static uint16_t input_vid_to_vlan(const struct xbundle
*, uint16_t vid
);
241 static void output_normal(struct xlate_ctx
*, const struct xbundle
*,
243 static void compose_output_action(struct xlate_ctx
*, ofp_port_t ofp_port
);
245 static struct xbridge
*xbridge_lookup(const struct ofproto_dpif
*);
246 static struct xbundle
*xbundle_lookup(const struct ofbundle
*);
247 static struct xport
*xport_lookup(const struct ofport_dpif
*);
248 static struct xport
*get_ofp_port(const struct xbridge
*, ofp_port_t ofp_port
);
249 static struct skb_priority_to_dscp
*get_skb_priority(const struct xport
*,
250 uint32_t skb_priority
);
251 static void clear_skb_priorities(struct xport
*);
252 static bool dscp_from_skb_priority(const struct xport
*, uint32_t skb_priority
,
256 xlate_ofproto_set(struct ofproto_dpif
*ofproto
, const char *name
,
257 struct dpif
*dpif
, struct rule_dpif
*miss_rule
,
258 struct rule_dpif
*no_packet_in_rule
,
259 const struct mac_learning
*ml
, struct stp
*stp
,
260 const struct mbridge
*mbridge
,
261 const struct dpif_sflow
*sflow
,
262 const struct dpif_ipfix
*ipfix
,
263 const struct netflow
*netflow
, enum ofp_config_flags frag
,
264 bool forward_bpdu
, bool has_in_band
,
266 bool variable_length_userdata
,
267 size_t max_mpls_depth
)
269 struct xbridge
*xbridge
= xbridge_lookup(ofproto
);
272 xbridge
= xzalloc(sizeof *xbridge
);
273 xbridge
->ofproto
= ofproto
;
275 hmap_insert(&xbridges
, &xbridge
->hmap_node
, hash_pointer(ofproto
, 0));
276 hmap_init(&xbridge
->xports
);
277 list_init(&xbridge
->xbundles
);
280 if (xbridge
->ml
!= ml
) {
281 mac_learning_unref(xbridge
->ml
);
282 xbridge
->ml
= mac_learning_ref(ml
);
285 if (xbridge
->mbridge
!= mbridge
) {
286 mbridge_unref(xbridge
->mbridge
);
287 xbridge
->mbridge
= mbridge_ref(mbridge
);
290 if (xbridge
->sflow
!= sflow
) {
291 dpif_sflow_unref(xbridge
->sflow
);
292 xbridge
->sflow
= dpif_sflow_ref(sflow
);
295 if (xbridge
->ipfix
!= ipfix
) {
296 dpif_ipfix_unref(xbridge
->ipfix
);
297 xbridge
->ipfix
= dpif_ipfix_ref(ipfix
);
300 if (xbridge
->stp
!= stp
) {
301 stp_unref(xbridge
->stp
);
302 xbridge
->stp
= stp_ref(stp
);
305 if (xbridge
->netflow
!= netflow
) {
306 netflow_unref(xbridge
->netflow
);
307 xbridge
->netflow
= netflow_ref(netflow
);
311 xbridge
->name
= xstrdup(name
);
313 xbridge
->dpif
= dpif
;
314 xbridge
->forward_bpdu
= forward_bpdu
;
315 xbridge
->has_in_band
= has_in_band
;
316 xbridge
->frag
= frag
;
317 xbridge
->miss_rule
= miss_rule
;
318 xbridge
->no_packet_in_rule
= no_packet_in_rule
;
319 xbridge
->enable_recirc
= enable_recirc
;
320 xbridge
->variable_length_userdata
= variable_length_userdata
;
321 xbridge
->max_mpls_depth
= max_mpls_depth
;
325 xlate_remove_ofproto(struct ofproto_dpif
*ofproto
)
327 struct xbridge
*xbridge
= xbridge_lookup(ofproto
);
328 struct xbundle
*xbundle
, *next_xbundle
;
329 struct xport
*xport
, *next_xport
;
335 HMAP_FOR_EACH_SAFE (xport
, next_xport
, ofp_node
, &xbridge
->xports
) {
336 xlate_ofport_remove(xport
->ofport
);
339 LIST_FOR_EACH_SAFE (xbundle
, next_xbundle
, list_node
, &xbridge
->xbundles
) {
340 xlate_bundle_remove(xbundle
->ofbundle
);
343 hmap_remove(&xbridges
, &xbridge
->hmap_node
);
344 mac_learning_unref(xbridge
->ml
);
345 mbridge_unref(xbridge
->mbridge
);
346 dpif_sflow_unref(xbridge
->sflow
);
347 dpif_ipfix_unref(xbridge
->ipfix
);
348 stp_unref(xbridge
->stp
);
349 hmap_destroy(&xbridge
->xports
);
355 xlate_bundle_set(struct ofproto_dpif
*ofproto
, struct ofbundle
*ofbundle
,
356 const char *name
, enum port_vlan_mode vlan_mode
, int vlan
,
357 unsigned long *trunks
, bool use_priority_tags
,
358 const struct bond
*bond
, const struct lacp
*lacp
,
361 struct xbundle
*xbundle
= xbundle_lookup(ofbundle
);
364 xbundle
= xzalloc(sizeof *xbundle
);
365 xbundle
->ofbundle
= ofbundle
;
366 xbundle
->xbridge
= xbridge_lookup(ofproto
);
368 hmap_insert(&xbundles
, &xbundle
->hmap_node
, hash_pointer(ofbundle
, 0));
369 list_insert(&xbundle
->xbridge
->xbundles
, &xbundle
->list_node
);
370 list_init(&xbundle
->xports
);
373 ovs_assert(xbundle
->xbridge
);
376 xbundle
->name
= xstrdup(name
);
378 xbundle
->vlan_mode
= vlan_mode
;
379 xbundle
->vlan
= vlan
;
380 xbundle
->trunks
= trunks
;
381 xbundle
->use_priority_tags
= use_priority_tags
;
382 xbundle
->floodable
= floodable
;
384 if (xbundle
->bond
!= bond
) {
385 bond_unref(xbundle
->bond
);
386 xbundle
->bond
= bond_ref(bond
);
389 if (xbundle
->lacp
!= lacp
) {
390 lacp_unref(xbundle
->lacp
);
391 xbundle
->lacp
= lacp_ref(lacp
);
396 xlate_bundle_remove(struct ofbundle
*ofbundle
)
398 struct xbundle
*xbundle
= xbundle_lookup(ofbundle
);
399 struct xport
*xport
, *next
;
405 LIST_FOR_EACH_SAFE (xport
, next
, bundle_node
, &xbundle
->xports
) {
406 list_remove(&xport
->bundle_node
);
407 xport
->xbundle
= NULL
;
410 hmap_remove(&xbundles
, &xbundle
->hmap_node
);
411 list_remove(&xbundle
->list_node
);
412 bond_unref(xbundle
->bond
);
413 lacp_unref(xbundle
->lacp
);
419 xlate_ofport_set(struct ofproto_dpif
*ofproto
, struct ofbundle
*ofbundle
,
420 struct ofport_dpif
*ofport
, ofp_port_t ofp_port
,
421 odp_port_t odp_port
, const struct netdev
*netdev
,
422 const struct cfm
*cfm
, const struct bfd
*bfd
,
423 struct ofport_dpif
*peer
, int stp_port_no
,
424 const struct ofproto_port_queue
*qdscp_list
, size_t n_qdscp
,
425 enum ofputil_port_config config
,
426 enum ofputil_port_state state
, bool is_tunnel
,
429 struct xport
*xport
= xport_lookup(ofport
);
433 xport
= xzalloc(sizeof *xport
);
434 xport
->ofport
= ofport
;
435 xport
->xbridge
= xbridge_lookup(ofproto
);
436 xport
->ofp_port
= ofp_port
;
438 hmap_init(&xport
->skb_priorities
);
439 hmap_insert(&xports
, &xport
->hmap_node
, hash_pointer(ofport
, 0));
440 hmap_insert(&xport
->xbridge
->xports
, &xport
->ofp_node
,
441 hash_ofp_port(xport
->ofp_port
));
444 ovs_assert(xport
->ofp_port
== ofp_port
);
446 xport
->config
= config
;
447 xport
->state
= state
;
448 xport
->stp_port_no
= stp_port_no
;
449 xport
->is_tunnel
= is_tunnel
;
450 xport
->may_enable
= may_enable
;
451 xport
->odp_port
= odp_port
;
453 if (xport
->netdev
!= netdev
) {
454 netdev_close(xport
->netdev
);
455 xport
->netdev
= netdev_ref(netdev
);
458 if (xport
->cfm
!= cfm
) {
459 cfm_unref(xport
->cfm
);
460 xport
->cfm
= cfm_ref(cfm
);
463 if (xport
->bfd
!= bfd
) {
464 bfd_unref(xport
->bfd
);
465 xport
->bfd
= bfd_ref(bfd
);
469 xport
->peer
->peer
= NULL
;
471 xport
->peer
= xport_lookup(peer
);
473 xport
->peer
->peer
= xport
;
476 if (xport
->xbundle
) {
477 list_remove(&xport
->bundle_node
);
479 xport
->xbundle
= xbundle_lookup(ofbundle
);
480 if (xport
->xbundle
) {
481 list_insert(&xport
->xbundle
->xports
, &xport
->bundle_node
);
484 clear_skb_priorities(xport
);
485 for (i
= 0; i
< n_qdscp
; i
++) {
486 struct skb_priority_to_dscp
*pdscp
;
487 uint32_t skb_priority
;
489 if (dpif_queue_to_priority(xport
->xbridge
->dpif
, qdscp_list
[i
].queue
,
494 pdscp
= xmalloc(sizeof *pdscp
);
495 pdscp
->skb_priority
= skb_priority
;
496 pdscp
->dscp
= (qdscp_list
[i
].dscp
<< 2) & IP_DSCP_MASK
;
497 hmap_insert(&xport
->skb_priorities
, &pdscp
->hmap_node
,
498 hash_int(pdscp
->skb_priority
, 0));
503 xlate_ofport_remove(struct ofport_dpif
*ofport
)
505 struct xport
*xport
= xport_lookup(ofport
);
512 xport
->peer
->peer
= NULL
;
516 if (xport
->xbundle
) {
517 list_remove(&xport
->bundle_node
);
520 clear_skb_priorities(xport
);
521 hmap_destroy(&xport
->skb_priorities
);
523 hmap_remove(&xports
, &xport
->hmap_node
);
524 hmap_remove(&xport
->xbridge
->xports
, &xport
->ofp_node
);
526 netdev_close(xport
->netdev
);
527 cfm_unref(xport
->cfm
);
528 bfd_unref(xport
->bfd
);
532 /* Given a datpath, packet, and flow metadata ('backer', 'packet', and 'key'
533 * respectively), populates 'flow' with the result of odp_flow_key_to_flow().
534 * Optionally populates 'ofproto' with the ofproto_dpif, 'odp_in_port' with
535 * the datapath in_port, that 'packet' ingressed, and 'ipfix', 'sflow', and
536 * 'netflow' with the appropriate handles for those protocols if they're
537 * enabled. Caller is responsible for unrefing them.
539 * If 'ofproto' is nonnull, requires 'flow''s in_port to exist. Otherwise sets
540 * 'flow''s in_port to OFPP_NONE.
542 * This function does post-processing on data returned from
543 * odp_flow_key_to_flow() to help make VLAN splinters transparent to the rest
544 * of the upcall processing logic. In particular, if the extracted in_port is
545 * a VLAN splinter port, it replaces flow->in_port by the "real" port, sets
546 * flow->vlan_tci correctly for the VLAN of the VLAN splinter port, and pushes
547 * a VLAN header onto 'packet' (if it is nonnull).
549 * Similarly, this function also includes some logic to help with tunnels. It
550 * may modify 'flow' as necessary to make the tunneling implementation
551 * transparent to the upcall processing logic.
553 * Returns 0 if successful, ENODEV if the parsed flow has no associated ofport,
554 * or some other positive errno if there are other problems. */
556 xlate_receive(const struct dpif_backer
*backer
, struct ofpbuf
*packet
,
557 const struct nlattr
*key
, size_t key_len
, struct flow
*flow
,
558 struct ofproto_dpif
**ofproto
, struct dpif_ipfix
**ipfix
,
559 struct dpif_sflow
**sflow
, struct netflow
**netflow
,
560 odp_port_t
*odp_in_port
)
562 const struct xport
*xport
;
565 ovs_rwlock_rdlock(&xlate_rwlock
);
566 if (odp_flow_key_to_flow(key
, key_len
, flow
) == ODP_FIT_ERROR
) {
572 *odp_in_port
= flow
->in_port
.odp_port
;
575 xport
= xport_lookup(tnl_port_should_receive(flow
)
576 ? tnl_port_receive(flow
)
577 : odp_port_to_ofport(backer
, flow
->in_port
.odp_port
));
579 flow
->in_port
.ofp_port
= xport
? xport
->ofp_port
: OFPP_NONE
;
584 if (vsp_adjust_flow(xport
->xbridge
->ofproto
, flow
)) {
586 /* Make the packet resemble the flow, so that it gets sent to
587 * an OpenFlow controller properly, so that it looks correct
588 * for sFlow, and so that flow_extract() will get the correct
589 * vlan_tci if it is called on 'packet'. */
590 eth_push_vlan(packet
, htons(ETH_TYPE_VLAN
), flow
->vlan_tci
);
596 *ofproto
= xport
->xbridge
->ofproto
;
600 *ipfix
= dpif_ipfix_ref(xport
->xbridge
->ipfix
);
604 *sflow
= dpif_sflow_ref(xport
->xbridge
->sflow
);
608 *netflow
= netflow_ref(xport
->xbridge
->netflow
);
612 ovs_rwlock_unlock(&xlate_rwlock
);
616 static struct xbridge
*
617 xbridge_lookup(const struct ofproto_dpif
*ofproto
)
619 struct xbridge
*xbridge
;
625 HMAP_FOR_EACH_IN_BUCKET (xbridge
, hmap_node
, hash_pointer(ofproto
, 0),
627 if (xbridge
->ofproto
== ofproto
) {
634 static struct xbundle
*
635 xbundle_lookup(const struct ofbundle
*ofbundle
)
637 struct xbundle
*xbundle
;
643 HMAP_FOR_EACH_IN_BUCKET (xbundle
, hmap_node
, hash_pointer(ofbundle
, 0),
645 if (xbundle
->ofbundle
== ofbundle
) {
652 static struct xport
*
653 xport_lookup(const struct ofport_dpif
*ofport
)
661 HMAP_FOR_EACH_IN_BUCKET (xport
, hmap_node
, hash_pointer(ofport
, 0),
663 if (xport
->ofport
== ofport
) {
670 static struct stp_port
*
671 xport_get_stp_port(const struct xport
*xport
)
673 return xport
->xbridge
->stp
&& xport
->stp_port_no
!= -1
674 ? stp_get_port(xport
->xbridge
->stp
, xport
->stp_port_no
)
679 xport_stp_learn_state(const struct xport
*xport
)
681 struct stp_port
*sp
= xport_get_stp_port(xport
);
682 return stp_learn_in_state(sp
? stp_port_get_state(sp
) : STP_DISABLED
);
686 xport_stp_forward_state(const struct xport
*xport
)
688 struct stp_port
*sp
= xport_get_stp_port(xport
);
689 return stp_forward_in_state(sp
? stp_port_get_state(sp
) : STP_DISABLED
);
693 xport_stp_listen_state(const struct xport
*xport
)
695 struct stp_port
*sp
= xport_get_stp_port(xport
);
696 return stp_listen_in_state(sp
? stp_port_get_state(sp
) : STP_DISABLED
);
699 /* Returns true if STP should process 'flow'. Sets fields in 'wc' that
700 * were used to make the determination.*/
702 stp_should_process_flow(const struct flow
*flow
, struct flow_wildcards
*wc
)
704 memset(&wc
->masks
.dl_dst
, 0xff, sizeof wc
->masks
.dl_dst
);
705 return eth_addr_equals(flow
->dl_dst
, eth_addr_stp
);
709 stp_process_packet(const struct xport
*xport
, const struct ofpbuf
*packet
)
711 struct stp_port
*sp
= xport_get_stp_port(xport
);
712 struct ofpbuf payload
= *packet
;
713 struct eth_header
*eth
= ofpbuf_data(&payload
);
715 /* Sink packets on ports that have STP disabled when the bridge has
717 if (!sp
|| stp_port_get_state(sp
) == STP_DISABLED
) {
721 /* Trim off padding on payload. */
722 if (ofpbuf_size(&payload
) > ntohs(eth
->eth_type
) + ETH_HEADER_LEN
) {
723 ofpbuf_set_size(&payload
, ntohs(eth
->eth_type
) + ETH_HEADER_LEN
);
726 if (ofpbuf_try_pull(&payload
, ETH_HEADER_LEN
+ LLC_HEADER_LEN
)) {
727 stp_received_bpdu(sp
, ofpbuf_data(&payload
), ofpbuf_size(&payload
));
731 static struct xport
*
732 get_ofp_port(const struct xbridge
*xbridge
, ofp_port_t ofp_port
)
736 HMAP_FOR_EACH_IN_BUCKET (xport
, ofp_node
, hash_ofp_port(ofp_port
),
738 if (xport
->ofp_port
== ofp_port
) {
746 ofp_port_to_odp_port(const struct xbridge
*xbridge
, ofp_port_t ofp_port
)
748 const struct xport
*xport
= get_ofp_port(xbridge
, ofp_port
);
749 return xport
? xport
->odp_port
: ODPP_NONE
;
753 odp_port_is_alive(const struct xlate_ctx
*ctx
, ofp_port_t ofp_port
)
757 xport
= get_ofp_port(ctx
->xbridge
, ofp_port
);
758 if (!xport
|| xport
->config
& OFPUTIL_PC_PORT_DOWN
||
759 xport
->state
& OFPUTIL_PS_LINK_DOWN
) {
766 static const struct ofputil_bucket
*
767 group_first_live_bucket(const struct xlate_ctx
*, const struct group_dpif
*,
771 group_is_alive(const struct xlate_ctx
*ctx
, uint32_t group_id
, int depth
)
773 struct group_dpif
*group
;
776 hit
= group_dpif_lookup(ctx
->xbridge
->ofproto
, group_id
, &group
);
781 hit
= group_first_live_bucket(ctx
, group
, depth
) != NULL
;
783 group_dpif_release(group
);
787 #define MAX_LIVENESS_RECURSION 128 /* Arbitrary limit */
790 bucket_is_alive(const struct xlate_ctx
*ctx
,
791 const struct ofputil_bucket
*bucket
, int depth
)
793 if (depth
>= MAX_LIVENESS_RECURSION
) {
794 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 1);
796 VLOG_WARN_RL(&rl
, "bucket chaining exceeded %d links",
797 MAX_LIVENESS_RECURSION
);
801 return !ofputil_bucket_has_liveness(bucket
) ||
802 (bucket
->watch_port
!= OFPP_ANY
&&
803 odp_port_is_alive(ctx
, bucket
->watch_port
)) ||
804 (bucket
->watch_group
!= OFPG_ANY
&&
805 group_is_alive(ctx
, bucket
->watch_group
, depth
+ 1));
808 static const struct ofputil_bucket
*
809 group_first_live_bucket(const struct xlate_ctx
*ctx
,
810 const struct group_dpif
*group
, int depth
)
812 struct ofputil_bucket
*bucket
;
813 const struct list
*buckets
;
815 group_dpif_get_buckets(group
, &buckets
);
816 LIST_FOR_EACH (bucket
, list_node
, buckets
) {
817 if (bucket_is_alive(ctx
, bucket
, depth
)) {
825 static const struct ofputil_bucket
*
826 group_best_live_bucket(const struct xlate_ctx
*ctx
,
827 const struct group_dpif
*group
,
830 const struct ofputil_bucket
*best_bucket
= NULL
;
831 uint32_t best_score
= 0;
834 const struct ofputil_bucket
*bucket
;
835 const struct list
*buckets
;
837 group_dpif_get_buckets(group
, &buckets
);
838 LIST_FOR_EACH (bucket
, list_node
, buckets
) {
839 if (bucket_is_alive(ctx
, bucket
, 0)) {
840 uint32_t score
= (hash_int(i
, basis
) & 0xffff) * bucket
->weight
;
841 if (score
>= best_score
) {
842 best_bucket
= bucket
;
853 xbundle_trunks_vlan(const struct xbundle
*bundle
, uint16_t vlan
)
855 return (bundle
->vlan_mode
!= PORT_VLAN_ACCESS
856 && (!bundle
->trunks
|| bitmap_is_set(bundle
->trunks
, vlan
)));
860 xbundle_includes_vlan(const struct xbundle
*xbundle
, uint16_t vlan
)
862 return vlan
== xbundle
->vlan
|| xbundle_trunks_vlan(xbundle
, vlan
);
866 xbundle_mirror_out(const struct xbridge
*xbridge
, struct xbundle
*xbundle
)
868 return xbundle
!= &ofpp_none_bundle
869 ? mirror_bundle_out(xbridge
->mbridge
, xbundle
->ofbundle
)
874 xbundle_mirror_src(const struct xbridge
*xbridge
, struct xbundle
*xbundle
)
876 return xbundle
!= &ofpp_none_bundle
877 ? mirror_bundle_src(xbridge
->mbridge
, xbundle
->ofbundle
)
882 xbundle_mirror_dst(const struct xbridge
*xbridge
, struct xbundle
*xbundle
)
884 return xbundle
!= &ofpp_none_bundle
885 ? mirror_bundle_dst(xbridge
->mbridge
, xbundle
->ofbundle
)
889 static struct xbundle
*
890 lookup_input_bundle(const struct xbridge
*xbridge
, ofp_port_t in_port
,
891 bool warn
, struct xport
**in_xportp
)
895 /* Find the port and bundle for the received packet. */
896 xport
= get_ofp_port(xbridge
, in_port
);
900 if (xport
&& xport
->xbundle
) {
901 return xport
->xbundle
;
904 /* Special-case OFPP_NONE, which a controller may use as the ingress
905 * port for traffic that it is sourcing. */
906 if (in_port
== OFPP_NONE
) {
907 return &ofpp_none_bundle
;
910 /* Odd. A few possible reasons here:
912 * - We deleted a port but there are still a few packets queued up
915 * - Someone externally added a port (e.g. "ovs-dpctl add-if") that
916 * we don't know about.
918 * - The ofproto client didn't configure the port as part of a bundle.
919 * This is particularly likely to happen if a packet was received on the
920 * port after it was created, but before the client had a chance to
921 * configure its bundle.
924 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
926 VLOG_WARN_RL(&rl
, "bridge %s: received packet on unknown "
927 "port %"PRIu16
, xbridge
->name
, in_port
);
933 add_mirror_actions(struct xlate_ctx
*ctx
, const struct flow
*orig_flow
)
935 const struct xbridge
*xbridge
= ctx
->xbridge
;
936 mirror_mask_t mirrors
;
937 struct xbundle
*in_xbundle
;
941 mirrors
= ctx
->xout
->mirrors
;
942 ctx
->xout
->mirrors
= 0;
944 in_xbundle
= lookup_input_bundle(xbridge
, orig_flow
->in_port
.ofp_port
,
945 ctx
->xin
->packet
!= NULL
, NULL
);
949 mirrors
|= xbundle_mirror_src(xbridge
, in_xbundle
);
951 /* Drop frames on bundles reserved for mirroring. */
952 if (xbundle_mirror_out(xbridge
, in_xbundle
)) {
953 if (ctx
->xin
->packet
!= NULL
) {
954 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
955 VLOG_WARN_RL(&rl
, "bridge %s: dropping packet received on port "
956 "%s, which is reserved exclusively for mirroring",
957 ctx
->xbridge
->name
, in_xbundle
->name
);
959 ofpbuf_clear(&ctx
->xout
->odp_actions
);
964 vid
= vlan_tci_to_vid(orig_flow
->vlan_tci
);
965 if (!input_vid_is_valid(vid
, in_xbundle
, ctx
->xin
->packet
!= NULL
)) {
968 vlan
= input_vid_to_vlan(in_xbundle
, vid
);
974 /* Restore the original packet before adding the mirror actions. */
975 ctx
->xin
->flow
= *orig_flow
;
978 mirror_mask_t dup_mirrors
;
979 struct ofbundle
*out
;
980 unsigned long *vlans
;
985 has_mirror
= mirror_get(xbridge
->mbridge
, raw_ctz(mirrors
),
986 &vlans
, &dup_mirrors
, &out
, &out_vlan
);
987 ovs_assert(has_mirror
);
990 ctx
->xout
->wc
.masks
.vlan_tci
|= htons(VLAN_CFI
| VLAN_VID_MASK
);
992 vlan_mirrored
= !vlans
|| bitmap_is_set(vlans
, vlan
);
995 if (!vlan_mirrored
) {
996 mirrors
= zero_rightmost_1bit(mirrors
);
1000 mirrors
&= ~dup_mirrors
;
1001 ctx
->xout
->mirrors
|= dup_mirrors
;
1003 struct xbundle
*out_xbundle
= xbundle_lookup(out
);
1005 output_normal(ctx
, out_xbundle
, vlan
);
1007 } else if (vlan
!= out_vlan
1008 && !eth_addr_is_reserved(orig_flow
->dl_dst
)) {
1009 struct xbundle
*xbundle
;
1011 LIST_FOR_EACH (xbundle
, list_node
, &xbridge
->xbundles
) {
1012 if (xbundle_includes_vlan(xbundle
, out_vlan
)
1013 && !xbundle_mirror_out(xbridge
, xbundle
)) {
1014 output_normal(ctx
, xbundle
, out_vlan
);
1021 /* Given 'vid', the VID obtained from the 802.1Q header that was received as
1022 * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle',
1023 * the bundle on which the packet was received, returns the VLAN to which the
1026 * Both 'vid' and the return value are in the range 0...4095. */
1028 input_vid_to_vlan(const struct xbundle
*in_xbundle
, uint16_t vid
)
1030 switch (in_xbundle
->vlan_mode
) {
1031 case PORT_VLAN_ACCESS
:
1032 return in_xbundle
->vlan
;
1035 case PORT_VLAN_TRUNK
:
1038 case PORT_VLAN_NATIVE_UNTAGGED
:
1039 case PORT_VLAN_NATIVE_TAGGED
:
1040 return vid
? vid
: in_xbundle
->vlan
;
1047 /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'.
1048 * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs
1051 * 'vid' should be the VID obtained from the 802.1Q header that was received as
1052 * part of a packet (specify 0 if there was no 802.1Q header), in the range
1055 input_vid_is_valid(uint16_t vid
, struct xbundle
*in_xbundle
, bool warn
)
1057 /* Allow any VID on the OFPP_NONE port. */
1058 if (in_xbundle
== &ofpp_none_bundle
) {
1062 switch (in_xbundle
->vlan_mode
) {
1063 case PORT_VLAN_ACCESS
:
1066 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
1067 VLOG_WARN_RL(&rl
, "dropping VLAN %"PRIu16
" tagged "
1068 "packet received on port %s configured as VLAN "
1069 "%"PRIu16
" access port", vid
, in_xbundle
->name
,
1076 case PORT_VLAN_NATIVE_UNTAGGED
:
1077 case PORT_VLAN_NATIVE_TAGGED
:
1079 /* Port must always carry its native VLAN. */
1083 case PORT_VLAN_TRUNK
:
1084 if (!xbundle_includes_vlan(in_xbundle
, vid
)) {
1086 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
1087 VLOG_WARN_RL(&rl
, "dropping VLAN %"PRIu16
" packet "
1088 "received on port %s not configured for trunking "
1089 "VLAN %"PRIu16
, vid
, in_xbundle
->name
, vid
);
1101 /* Given 'vlan', the VLAN that a packet belongs to, and
1102 * 'out_xbundle', a bundle on which the packet is to be output, returns the VID
1103 * that should be included in the 802.1Q header. (If the return value is 0,
1104 * then the 802.1Q header should only be included in the packet if there is a
1107 * Both 'vlan' and the return value are in the range 0...4095. */
1109 output_vlan_to_vid(const struct xbundle
*out_xbundle
, uint16_t vlan
)
1111 switch (out_xbundle
->vlan_mode
) {
1112 case PORT_VLAN_ACCESS
:
1115 case PORT_VLAN_TRUNK
:
1116 case PORT_VLAN_NATIVE_TAGGED
:
1119 case PORT_VLAN_NATIVE_UNTAGGED
:
1120 return vlan
== out_xbundle
->vlan
? 0 : vlan
;
1128 output_normal(struct xlate_ctx
*ctx
, const struct xbundle
*out_xbundle
,
1131 ovs_be16
*flow_tci
= &ctx
->xin
->flow
.vlan_tci
;
1133 ovs_be16 tci
, old_tci
;
1134 struct xport
*xport
;
1136 vid
= output_vlan_to_vid(out_xbundle
, vlan
);
1137 if (list_is_empty(&out_xbundle
->xports
)) {
1138 /* Partially configured bundle with no slaves. Drop the packet. */
1140 } else if (!out_xbundle
->bond
) {
1141 ctx
->xout
->use_recirc
= false;
1142 xport
= CONTAINER_OF(list_front(&out_xbundle
->xports
), struct xport
,
1145 struct ofport_dpif
*ofport
;
1146 struct xlate_recirc
*xr
= &ctx
->xout
->recirc
;
1147 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
1149 if (ctx
->xbridge
->enable_recirc
) {
1150 ctx
->xout
->use_recirc
= bond_may_recirc(
1151 out_xbundle
->bond
, &xr
->recirc_id
, &xr
->hash_bias
);
1153 if (ctx
->xout
->use_recirc
) {
1154 /* Only TCP mode uses recirculation. */
1155 xr
->hash_alg
= OVS_RECIRC_HASH_ALG_L4
;
1156 bond_update_post_recirc_rules(out_xbundle
->bond
, false);
1158 /* Recirculation does not require unmasking hash fields. */
1163 ofport
= bond_choose_output_slave(out_xbundle
->bond
,
1164 &ctx
->xin
->flow
, wc
, vid
);
1165 xport
= xport_lookup(ofport
);
1168 /* No slaves enabled, so drop packet. */
1172 if (ctx
->xin
->resubmit_stats
) {
1173 bond_account(out_xbundle
->bond
, &ctx
->xin
->flow
, vid
,
1174 ctx
->xin
->resubmit_stats
->n_bytes
);
1178 old_tci
= *flow_tci
;
1180 if (tci
|| out_xbundle
->use_priority_tags
) {
1181 tci
|= *flow_tci
& htons(VLAN_PCP_MASK
);
1183 tci
|= htons(VLAN_CFI
);
1188 compose_output_action(ctx
, xport
->ofp_port
);
1189 *flow_tci
= old_tci
;
1192 /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after
1193 * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to
1194 * indicate this; newer upstream kernels use gratuitous ARP requests. */
1196 is_gratuitous_arp(const struct flow
*flow
, struct flow_wildcards
*wc
)
1198 if (flow
->dl_type
!= htons(ETH_TYPE_ARP
)) {
1202 memset(&wc
->masks
.dl_dst
, 0xff, sizeof wc
->masks
.dl_dst
);
1203 if (!eth_addr_is_broadcast(flow
->dl_dst
)) {
1207 memset(&wc
->masks
.nw_proto
, 0xff, sizeof wc
->masks
.nw_proto
);
1208 if (flow
->nw_proto
== ARP_OP_REPLY
) {
1210 } else if (flow
->nw_proto
== ARP_OP_REQUEST
) {
1211 memset(&wc
->masks
.nw_src
, 0xff, sizeof wc
->masks
.nw_src
);
1212 memset(&wc
->masks
.nw_dst
, 0xff, sizeof wc
->masks
.nw_dst
);
1214 return flow
->nw_src
== flow
->nw_dst
;
1220 /* Checks whether a MAC learning update is necessary for MAC learning table
1221 * 'ml' given that a packet matching 'flow' was received on 'in_xbundle' in
1224 * Most packets processed through the MAC learning table do not actually
1225 * change it in any way. This function requires only a read lock on the MAC
1226 * learning table, so it is much cheaper in this common case.
1228 * Keep the code here synchronized with that in update_learning_table__()
1231 is_mac_learning_update_needed(const struct mac_learning
*ml
,
1232 const struct flow
*flow
,
1233 struct flow_wildcards
*wc
,
1234 int vlan
, struct xbundle
*in_xbundle
)
1235 OVS_REQ_RDLOCK(ml
->rwlock
)
1237 struct mac_entry
*mac
;
1239 if (!mac_learning_may_learn(ml
, flow
->dl_src
, vlan
)) {
1243 mac
= mac_learning_lookup(ml
, flow
->dl_src
, vlan
);
1244 if (!mac
|| mac_entry_age(ml
, mac
)) {
1248 if (is_gratuitous_arp(flow
, wc
)) {
1249 /* We don't want to learn from gratuitous ARP packets that are
1250 * reflected back over bond slaves so we lock the learning table. */
1251 if (!in_xbundle
->bond
) {
1253 } else if (mac_entry_is_grat_arp_locked(mac
)) {
1258 return mac
->port
.p
!= in_xbundle
->ofbundle
;
1262 /* Updates MAC learning table 'ml' given that a packet matching 'flow' was
1263 * received on 'in_xbundle' in 'vlan'.
1265 * This code repeats all the checks in is_mac_learning_update_needed() because
1266 * the lock was released between there and here and thus the MAC learning state
1267 * could have changed.
1269 * Keep the code here synchronized with that in is_mac_learning_update_needed()
1272 update_learning_table__(const struct xbridge
*xbridge
,
1273 const struct flow
*flow
, struct flow_wildcards
*wc
,
1274 int vlan
, struct xbundle
*in_xbundle
)
1275 OVS_REQ_WRLOCK(xbridge
->ml
->rwlock
)
1277 struct mac_entry
*mac
;
1279 if (!mac_learning_may_learn(xbridge
->ml
, flow
->dl_src
, vlan
)) {
1283 mac
= mac_learning_insert(xbridge
->ml
, flow
->dl_src
, vlan
);
1284 if (is_gratuitous_arp(flow
, wc
)) {
1285 /* We don't want to learn from gratuitous ARP packets that are
1286 * reflected back over bond slaves so we lock the learning table. */
1287 if (!in_xbundle
->bond
) {
1288 mac_entry_set_grat_arp_lock(mac
);
1289 } else if (mac_entry_is_grat_arp_locked(mac
)) {
1294 if (mac
->port
.p
!= in_xbundle
->ofbundle
) {
1295 /* The log messages here could actually be useful in debugging,
1296 * so keep the rate limit relatively high. */
1297 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(30, 300);
1299 VLOG_DBG_RL(&rl
, "bridge %s: learned that "ETH_ADDR_FMT
" is "
1300 "on port %s in VLAN %d",
1301 xbridge
->name
, ETH_ADDR_ARGS(flow
->dl_src
),
1302 in_xbundle
->name
, vlan
);
1304 mac
->port
.p
= in_xbundle
->ofbundle
;
1305 mac_learning_changed(xbridge
->ml
);
1310 update_learning_table(const struct xbridge
*xbridge
,
1311 const struct flow
*flow
, struct flow_wildcards
*wc
,
1312 int vlan
, struct xbundle
*in_xbundle
)
1316 /* Don't learn the OFPP_NONE port. */
1317 if (in_xbundle
== &ofpp_none_bundle
) {
1321 /* First try the common case: no change to MAC learning table. */
1322 ovs_rwlock_rdlock(&xbridge
->ml
->rwlock
);
1323 need_update
= is_mac_learning_update_needed(xbridge
->ml
, flow
, wc
, vlan
,
1325 ovs_rwlock_unlock(&xbridge
->ml
->rwlock
);
1328 /* Slow path: MAC learning table might need an update. */
1329 ovs_rwlock_wrlock(&xbridge
->ml
->rwlock
);
1330 update_learning_table__(xbridge
, flow
, wc
, vlan
, in_xbundle
);
1331 ovs_rwlock_unlock(&xbridge
->ml
->rwlock
);
1335 /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or
1336 * dropped. Returns true if they may be forwarded, false if they should be
1339 * 'in_port' must be the xport that corresponds to flow->in_port.
1340 * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull).
1342 * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as
1343 * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as
1344 * checked by input_vid_is_valid().
1346 * May also add tags to '*tags', although the current implementation only does
1347 * so in one special case.
1350 is_admissible(struct xlate_ctx
*ctx
, struct xport
*in_port
,
1353 struct xbundle
*in_xbundle
= in_port
->xbundle
;
1354 const struct xbridge
*xbridge
= ctx
->xbridge
;
1355 struct flow
*flow
= &ctx
->xin
->flow
;
1357 /* Drop frames for reserved multicast addresses
1358 * only if forward_bpdu option is absent. */
1359 if (!xbridge
->forward_bpdu
&& eth_addr_is_reserved(flow
->dl_dst
)) {
1360 xlate_report(ctx
, "packet has reserved destination MAC, dropping");
1364 if (in_xbundle
->bond
) {
1365 struct mac_entry
*mac
;
1367 switch (bond_check_admissibility(in_xbundle
->bond
, in_port
->ofport
,
1373 xlate_report(ctx
, "bonding refused admissibility, dropping");
1376 case BV_DROP_IF_MOVED
:
1377 ovs_rwlock_rdlock(&xbridge
->ml
->rwlock
);
1378 mac
= mac_learning_lookup(xbridge
->ml
, flow
->dl_src
, vlan
);
1379 if (mac
&& mac
->port
.p
!= in_xbundle
->ofbundle
&&
1380 (!is_gratuitous_arp(flow
, &ctx
->xout
->wc
)
1381 || mac_entry_is_grat_arp_locked(mac
))) {
1382 ovs_rwlock_unlock(&xbridge
->ml
->rwlock
);
1383 xlate_report(ctx
, "SLB bond thinks this packet looped back, "
1387 ovs_rwlock_unlock(&xbridge
->ml
->rwlock
);
1396 xlate_normal(struct xlate_ctx
*ctx
)
1398 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
1399 struct flow
*flow
= &ctx
->xin
->flow
;
1400 struct xbundle
*in_xbundle
;
1401 struct xport
*in_port
;
1402 struct mac_entry
*mac
;
1407 ctx
->xout
->has_normal
= true;
1409 memset(&wc
->masks
.dl_src
, 0xff, sizeof wc
->masks
.dl_src
);
1410 memset(&wc
->masks
.dl_dst
, 0xff, sizeof wc
->masks
.dl_dst
);
1411 wc
->masks
.vlan_tci
|= htons(VLAN_VID_MASK
| VLAN_CFI
);
1413 in_xbundle
= lookup_input_bundle(ctx
->xbridge
, flow
->in_port
.ofp_port
,
1414 ctx
->xin
->packet
!= NULL
, &in_port
);
1416 xlate_report(ctx
, "no input bundle, dropping");
1420 /* Drop malformed frames. */
1421 if (flow
->dl_type
== htons(ETH_TYPE_VLAN
) &&
1422 !(flow
->vlan_tci
& htons(VLAN_CFI
))) {
1423 if (ctx
->xin
->packet
!= NULL
) {
1424 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
1425 VLOG_WARN_RL(&rl
, "bridge %s: dropping packet with partial "
1426 "VLAN tag received on port %s",
1427 ctx
->xbridge
->name
, in_xbundle
->name
);
1429 xlate_report(ctx
, "partial VLAN tag, dropping");
1433 /* Drop frames on bundles reserved for mirroring. */
1434 if (xbundle_mirror_out(ctx
->xbridge
, in_xbundle
)) {
1435 if (ctx
->xin
->packet
!= NULL
) {
1436 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
1437 VLOG_WARN_RL(&rl
, "bridge %s: dropping packet received on port "
1438 "%s, which is reserved exclusively for mirroring",
1439 ctx
->xbridge
->name
, in_xbundle
->name
);
1441 xlate_report(ctx
, "input port is mirror output port, dropping");
1446 vid
= vlan_tci_to_vid(flow
->vlan_tci
);
1447 if (!input_vid_is_valid(vid
, in_xbundle
, ctx
->xin
->packet
!= NULL
)) {
1448 xlate_report(ctx
, "disallowed VLAN VID for this input port, dropping");
1451 vlan
= input_vid_to_vlan(in_xbundle
, vid
);
1453 /* Check other admissibility requirements. */
1454 if (in_port
&& !is_admissible(ctx
, in_port
, vlan
)) {
1458 /* Learn source MAC. */
1459 if (ctx
->xin
->may_learn
) {
1460 update_learning_table(ctx
->xbridge
, flow
, wc
, vlan
, in_xbundle
);
1463 /* Determine output bundle. */
1464 ovs_rwlock_rdlock(&ctx
->xbridge
->ml
->rwlock
);
1465 mac
= mac_learning_lookup(ctx
->xbridge
->ml
, flow
->dl_dst
, vlan
);
1466 mac_port
= mac
? mac
->port
.p
: NULL
;
1467 ovs_rwlock_unlock(&ctx
->xbridge
->ml
->rwlock
);
1470 struct xbundle
*mac_xbundle
= xbundle_lookup(mac_port
);
1471 if (mac_xbundle
&& mac_xbundle
!= in_xbundle
) {
1472 xlate_report(ctx
, "forwarding to learned port");
1473 output_normal(ctx
, mac_xbundle
, vlan
);
1474 } else if (!mac_xbundle
) {
1475 xlate_report(ctx
, "learned port is unknown, dropping");
1477 xlate_report(ctx
, "learned port is input port, dropping");
1480 struct xbundle
*xbundle
;
1482 xlate_report(ctx
, "no learned MAC for destination, flooding");
1483 LIST_FOR_EACH (xbundle
, list_node
, &ctx
->xbridge
->xbundles
) {
1484 if (xbundle
!= in_xbundle
1485 && xbundle_includes_vlan(xbundle
, vlan
)
1486 && xbundle
->floodable
1487 && !xbundle_mirror_out(ctx
->xbridge
, xbundle
)) {
1488 output_normal(ctx
, xbundle
, vlan
);
1491 ctx
->xout
->nf_output_iface
= NF_OUT_FLOOD
;
1495 /* Compose SAMPLE action for sFlow or IPFIX. The given probability is
1496 * the number of packets out of UINT32_MAX to sample. The given
1497 * cookie is passed back in the callback for each sampled packet.
1500 compose_sample_action(const struct xbridge
*xbridge
,
1501 struct ofpbuf
*odp_actions
,
1502 const struct flow
*flow
,
1503 const uint32_t probability
,
1504 const union user_action_cookie
*cookie
,
1505 const size_t cookie_size
)
1507 size_t sample_offset
, actions_offset
;
1508 odp_port_t odp_port
;
1512 sample_offset
= nl_msg_start_nested(odp_actions
, OVS_ACTION_ATTR_SAMPLE
);
1514 nl_msg_put_u32(odp_actions
, OVS_SAMPLE_ATTR_PROBABILITY
, probability
);
1516 actions_offset
= nl_msg_start_nested(odp_actions
, OVS_SAMPLE_ATTR_ACTIONS
);
1518 odp_port
= ofp_port_to_odp_port(xbridge
, flow
->in_port
.ofp_port
);
1519 pid
= dpif_port_get_pid(xbridge
->dpif
, odp_port
, 0);
1520 cookie_offset
= odp_put_userspace_action(pid
, cookie
, cookie_size
, odp_actions
);
1522 nl_msg_end_nested(odp_actions
, actions_offset
);
1523 nl_msg_end_nested(odp_actions
, sample_offset
);
1524 return cookie_offset
;
1528 compose_sflow_cookie(const struct xbridge
*xbridge
, ovs_be16 vlan_tci
,
1529 odp_port_t odp_port
, unsigned int n_outputs
,
1530 union user_action_cookie
*cookie
)
1534 cookie
->type
= USER_ACTION_COOKIE_SFLOW
;
1535 cookie
->sflow
.vlan_tci
= vlan_tci
;
1537 /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output
1538 * port information") for the interpretation of cookie->output. */
1539 switch (n_outputs
) {
1541 /* 0x40000000 | 256 means "packet dropped for unknown reason". */
1542 cookie
->sflow
.output
= 0x40000000 | 256;
1546 ifindex
= dpif_sflow_odp_port_to_ifindex(xbridge
->sflow
, odp_port
);
1548 cookie
->sflow
.output
= ifindex
;
1553 /* 0x80000000 means "multiple output ports. */
1554 cookie
->sflow
.output
= 0x80000000 | n_outputs
;
1559 /* Compose SAMPLE action for sFlow bridge sampling. */
1561 compose_sflow_action(const struct xbridge
*xbridge
,
1562 struct ofpbuf
*odp_actions
,
1563 const struct flow
*flow
,
1564 odp_port_t odp_port
)
1566 uint32_t probability
;
1567 union user_action_cookie cookie
;
1569 if (!xbridge
->sflow
|| flow
->in_port
.ofp_port
== OFPP_NONE
) {
1573 probability
= dpif_sflow_get_probability(xbridge
->sflow
);
1574 compose_sflow_cookie(xbridge
, htons(0), odp_port
,
1575 odp_port
== ODPP_NONE
? 0 : 1, &cookie
);
1577 return compose_sample_action(xbridge
, odp_actions
, flow
, probability
,
1578 &cookie
, sizeof cookie
.sflow
);
1582 compose_flow_sample_cookie(uint16_t probability
, uint32_t collector_set_id
,
1583 uint32_t obs_domain_id
, uint32_t obs_point_id
,
1584 union user_action_cookie
*cookie
)
1586 cookie
->type
= USER_ACTION_COOKIE_FLOW_SAMPLE
;
1587 cookie
->flow_sample
.probability
= probability
;
1588 cookie
->flow_sample
.collector_set_id
= collector_set_id
;
1589 cookie
->flow_sample
.obs_domain_id
= obs_domain_id
;
1590 cookie
->flow_sample
.obs_point_id
= obs_point_id
;
1594 compose_ipfix_cookie(union user_action_cookie
*cookie
)
1596 cookie
->type
= USER_ACTION_COOKIE_IPFIX
;
1599 /* Compose SAMPLE action for IPFIX bridge sampling. */
1601 compose_ipfix_action(const struct xbridge
*xbridge
,
1602 struct ofpbuf
*odp_actions
,
1603 const struct flow
*flow
)
1605 uint32_t probability
;
1606 union user_action_cookie cookie
;
1608 if (!xbridge
->ipfix
|| flow
->in_port
.ofp_port
== OFPP_NONE
) {
1612 probability
= dpif_ipfix_get_bridge_exporter_probability(xbridge
->ipfix
);
1613 compose_ipfix_cookie(&cookie
);
1615 compose_sample_action(xbridge
, odp_actions
, flow
, probability
,
1616 &cookie
, sizeof cookie
.ipfix
);
1619 /* SAMPLE action for sFlow must be first action in any given list of
1620 * actions. At this point we do not have all information required to
1621 * build it. So try to build sample action as complete as possible. */
1623 add_sflow_action(struct xlate_ctx
*ctx
)
1625 ctx
->user_cookie_offset
= compose_sflow_action(ctx
->xbridge
,
1626 &ctx
->xout
->odp_actions
,
1627 &ctx
->xin
->flow
, ODPP_NONE
);
1628 ctx
->sflow_odp_port
= 0;
1629 ctx
->sflow_n_outputs
= 0;
1632 /* SAMPLE action for IPFIX must be 1st or 2nd action in any given list
1633 * of actions, eventually after the SAMPLE action for sFlow. */
1635 add_ipfix_action(struct xlate_ctx
*ctx
)
1637 compose_ipfix_action(ctx
->xbridge
, &ctx
->xout
->odp_actions
,
1641 /* Fix SAMPLE action according to data collected while composing ODP actions.
1642 * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested
1643 * USERSPACE action's user-cookie which is required for sflow. */
1645 fix_sflow_action(struct xlate_ctx
*ctx
)
1647 const struct flow
*base
= &ctx
->base_flow
;
1648 union user_action_cookie
*cookie
;
1650 if (!ctx
->user_cookie_offset
) {
1654 cookie
= ofpbuf_at(&ctx
->xout
->odp_actions
, ctx
->user_cookie_offset
,
1655 sizeof cookie
->sflow
);
1656 ovs_assert(cookie
->type
== USER_ACTION_COOKIE_SFLOW
);
1658 compose_sflow_cookie(ctx
->xbridge
, base
->vlan_tci
,
1659 ctx
->sflow_odp_port
, ctx
->sflow_n_outputs
, cookie
);
1662 static enum slow_path_reason
1663 process_special(struct xlate_ctx
*ctx
, const struct flow
*flow
,
1664 const struct xport
*xport
, const struct ofpbuf
*packet
)
1666 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
1667 const struct xbridge
*xbridge
= ctx
->xbridge
;
1671 } else if (xport
->cfm
&& cfm_should_process_flow(xport
->cfm
, flow
, wc
)) {
1673 cfm_process_heartbeat(xport
->cfm
, packet
);
1676 } else if (xport
->bfd
&& bfd_should_process_flow(xport
->bfd
, flow
, wc
)) {
1678 bfd_process_packet(xport
->bfd
, flow
, packet
);
1679 /* If POLL received, immediately sends FINAL back. */
1680 if (bfd_should_send_packet(xport
->bfd
)) {
1682 ofproto_dpif_monitor_port_send_soon(xport
->ofport
);
1684 ofproto_dpif_monitor_port_send_soon_safe(xport
->ofport
);
1689 } else if (xport
->xbundle
&& xport
->xbundle
->lacp
1690 && flow
->dl_type
== htons(ETH_TYPE_LACP
)) {
1692 lacp_process_packet(xport
->xbundle
->lacp
, xport
->ofport
, packet
);
1695 } else if (xbridge
->stp
&& stp_should_process_flow(flow
, wc
)) {
1697 stp_process_packet(xport
, packet
);
1706 compose_output_action__(struct xlate_ctx
*ctx
, ofp_port_t ofp_port
,
1709 const struct xport
*xport
= get_ofp_port(ctx
->xbridge
, ofp_port
);
1710 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
1711 struct flow
*flow
= &ctx
->xin
->flow
;
1712 ovs_be16 flow_vlan_tci
;
1713 uint32_t flow_pkt_mark
;
1714 uint8_t flow_nw_tos
;
1715 odp_port_t out_port
, odp_port
;
1718 /* If 'struct flow' gets additional metadata, we'll need to zero it out
1719 * before traversing a patch port. */
1720 BUILD_ASSERT_DECL(FLOW_WC_SEQ
== 25);
1723 xlate_report(ctx
, "Nonexistent output port");
1725 } else if (xport
->config
& OFPUTIL_PC_NO_FWD
) {
1726 xlate_report(ctx
, "OFPPC_NO_FWD set, skipping output");
1728 } else if (check_stp
) {
1729 if (eth_addr_equals(ctx
->base_flow
.dl_dst
, eth_addr_stp
)) {
1730 if (!xport_stp_listen_state(xport
)) {
1731 xlate_report(ctx
, "STP not in listening state, "
1732 "skipping bpdu output");
1735 } else if (!xport_stp_forward_state(xport
)) {
1736 xlate_report(ctx
, "STP not in forwarding state, "
1742 if (mbridge_has_mirrors(ctx
->xbridge
->mbridge
) && xport
->xbundle
) {
1743 ctx
->xout
->mirrors
|= xbundle_mirror_dst(xport
->xbundle
->xbridge
,
1748 const struct xport
*peer
= xport
->peer
;
1749 struct flow old_flow
= ctx
->xin
->flow
;
1750 enum slow_path_reason special
;
1752 ctx
->xbridge
= peer
->xbridge
;
1753 flow
->in_port
.ofp_port
= peer
->ofp_port
;
1754 flow
->metadata
= htonll(0);
1755 memset(&flow
->tunnel
, 0, sizeof flow
->tunnel
);
1756 memset(flow
->regs
, 0, sizeof flow
->regs
);
1758 special
= process_special(ctx
, &ctx
->xin
->flow
, peer
,
1761 ctx
->xout
->slow
|= special
;
1762 } else if (may_receive(peer
, ctx
)) {
1763 if (xport_stp_forward_state(peer
)) {
1764 xlate_table_action(ctx
, flow
->in_port
.ofp_port
, 0, true, true);
1766 /* Forwarding is disabled by STP. Let OFPP_NORMAL and the
1767 * learning action look at the packet, then drop it. */
1768 struct flow old_base_flow
= ctx
->base_flow
;
1769 size_t old_size
= ofpbuf_size(&ctx
->xout
->odp_actions
);
1770 mirror_mask_t old_mirrors
= ctx
->xout
->mirrors
;
1771 xlate_table_action(ctx
, flow
->in_port
.ofp_port
, 0, true, true);
1772 ctx
->xout
->mirrors
= old_mirrors
;
1773 ctx
->base_flow
= old_base_flow
;
1774 ofpbuf_set_size(&ctx
->xout
->odp_actions
, old_size
);
1778 ctx
->xin
->flow
= old_flow
;
1779 ctx
->xbridge
= xport
->xbridge
;
1781 if (ctx
->xin
->resubmit_stats
) {
1782 netdev_vport_inc_tx(xport
->netdev
, ctx
->xin
->resubmit_stats
);
1783 netdev_vport_inc_rx(peer
->netdev
, ctx
->xin
->resubmit_stats
);
1785 bfd_account_rx(peer
->bfd
, ctx
->xin
->resubmit_stats
);
1792 flow_vlan_tci
= flow
->vlan_tci
;
1793 flow_pkt_mark
= flow
->pkt_mark
;
1794 flow_nw_tos
= flow
->nw_tos
;
1796 if (dscp_from_skb_priority(xport
, flow
->skb_priority
, &dscp
)) {
1797 wc
->masks
.nw_tos
|= IP_DSCP_MASK
;
1798 flow
->nw_tos
&= ~IP_DSCP_MASK
;
1799 flow
->nw_tos
|= dscp
;
1802 if (xport
->is_tunnel
) {
1803 /* Save tunnel metadata so that changes made due to
1804 * the Logical (tunnel) Port are not visible for any further
1805 * matches, while explicit set actions on tunnel metadata are.
1807 struct flow_tnl flow_tnl
= flow
->tunnel
;
1808 odp_port
= tnl_port_send(xport
->ofport
, flow
, &ctx
->xout
->wc
);
1809 if (odp_port
== ODPP_NONE
) {
1810 xlate_report(ctx
, "Tunneling decided against output");
1811 goto out
; /* restore flow_nw_tos */
1813 if (flow
->tunnel
.ip_dst
== ctx
->orig_tunnel_ip_dst
) {
1814 xlate_report(ctx
, "Not tunneling to our own address");
1815 goto out
; /* restore flow_nw_tos */
1817 if (ctx
->xin
->resubmit_stats
) {
1818 netdev_vport_inc_tx(xport
->netdev
, ctx
->xin
->resubmit_stats
);
1820 out_port
= odp_port
;
1821 commit_odp_tunnel_action(flow
, &ctx
->base_flow
,
1822 &ctx
->xout
->odp_actions
);
1823 flow
->tunnel
= flow_tnl
; /* Restore tunnel metadata */
1825 odp_port
= xport
->odp_port
;
1826 out_port
= odp_port
;
1827 if (ofproto_has_vlan_splinters(ctx
->xbridge
->ofproto
)) {
1828 ofp_port_t vlandev_port
;
1830 wc
->masks
.vlan_tci
|= htons(VLAN_VID_MASK
| VLAN_CFI
);
1831 vlandev_port
= vsp_realdev_to_vlandev(ctx
->xbridge
->ofproto
,
1832 ofp_port
, flow
->vlan_tci
);
1833 if (vlandev_port
!= ofp_port
) {
1834 out_port
= ofp_port_to_odp_port(ctx
->xbridge
, vlandev_port
);
1835 flow
->vlan_tci
= htons(0);
1840 if (out_port
!= ODPP_NONE
) {
1841 ctx
->xout
->slow
|= commit_odp_actions(flow
, &ctx
->base_flow
,
1842 &ctx
->xout
->odp_actions
,
1845 if (ctx
->xout
->use_recirc
) {
1846 struct ovs_action_recirc
*act_recirc
;
1847 struct xlate_recirc
*xr
= &ctx
->xout
->recirc
;
1849 act_recirc
= nl_msg_put_unspec_uninit(&ctx
->xout
->odp_actions
,
1850 OVS_ACTION_ATTR_RECIRC
, sizeof *act_recirc
);
1851 act_recirc
->recirc_id
= xr
->recirc_id
;
1852 act_recirc
->hash_alg
= xr
->hash_alg
;
1853 act_recirc
->hash_bias
= xr
->hash_bias
;
1855 nl_msg_put_odp_port(&ctx
->xout
->odp_actions
, OVS_ACTION_ATTR_OUTPUT
,
1859 ctx
->sflow_odp_port
= odp_port
;
1860 ctx
->sflow_n_outputs
++;
1861 ctx
->xout
->nf_output_iface
= ofp_port
;
1866 flow
->vlan_tci
= flow_vlan_tci
;
1867 flow
->pkt_mark
= flow_pkt_mark
;
1868 flow
->nw_tos
= flow_nw_tos
;
1872 compose_output_action(struct xlate_ctx
*ctx
, ofp_port_t ofp_port
)
1874 compose_output_action__(ctx
, ofp_port
, true);
1878 xlate_recursively(struct xlate_ctx
*ctx
, struct rule_dpif
*rule
)
1880 struct rule_dpif
*old_rule
= ctx
->rule
;
1881 struct rule_actions
*actions
;
1883 if (ctx
->xin
->resubmit_stats
) {
1884 rule_dpif_credit_stats(rule
, ctx
->xin
->resubmit_stats
);
1890 actions
= rule_dpif_get_actions(rule
);
1891 do_xlate_actions(actions
->ofpacts
, actions
->ofpacts_len
, ctx
);
1892 ctx
->rule
= old_rule
;
1897 xlate_resubmit_resource_check(struct xlate_ctx
*ctx
)
1899 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 1);
1901 if (ctx
->recurse
>= MAX_RESUBMIT_RECURSION
+ MAX_INTERNAL_RESUBMITS
) {
1902 VLOG_ERR_RL(&rl
, "resubmit actions recursed over %d times",
1903 MAX_RESUBMIT_RECURSION
);
1904 } else if (ctx
->resubmits
>= MAX_RESUBMITS
+ MAX_INTERNAL_RESUBMITS
) {
1905 VLOG_ERR_RL(&rl
, "over %d resubmit actions", MAX_RESUBMITS
);
1906 } else if (ofpbuf_size(&ctx
->xout
->odp_actions
) > UINT16_MAX
) {
1907 VLOG_ERR_RL(&rl
, "resubmits yielded over 64 kB of actions");
1908 } else if (ofpbuf_size(&ctx
->stack
) >= 65536) {
1909 VLOG_ERR_RL(&rl
, "resubmits yielded over 64 kB of stack");
1918 xlate_table_action(struct xlate_ctx
*ctx
, ofp_port_t in_port
, uint8_t table_id
,
1919 bool may_packet_in
, bool honor_table_miss
)
1921 if (xlate_resubmit_resource_check(ctx
)) {
1922 ofp_port_t old_in_port
= ctx
->xin
->flow
.in_port
.ofp_port
;
1923 bool skip_wildcards
= ctx
->xin
->skip_wildcards
;
1924 uint8_t old_table_id
= ctx
->table_id
;
1925 struct rule_dpif
*rule
;
1926 enum rule_dpif_lookup_verdict verdict
;
1927 enum ofputil_port_config config
= 0;
1929 ctx
->table_id
= table_id
;
1931 /* Look up a flow with 'in_port' as the input port. Then restore the
1932 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
1933 * have surprising behavior). */
1934 ctx
->xin
->flow
.in_port
.ofp_port
= in_port
;
1935 verdict
= rule_dpif_lookup_from_table(ctx
->xbridge
->ofproto
,
1938 ? &ctx
->xout
->wc
: NULL
,
1940 &ctx
->table_id
, &rule
);
1941 ctx
->xin
->flow
.in_port
.ofp_port
= old_in_port
;
1943 if (ctx
->xin
->resubmit_hook
) {
1944 ctx
->xin
->resubmit_hook(ctx
->xin
, rule
, ctx
->recurse
);
1948 case RULE_DPIF_LOOKUP_VERDICT_MATCH
:
1950 case RULE_DPIF_LOOKUP_VERDICT_CONTROLLER
:
1951 if (may_packet_in
) {
1952 struct xport
*xport
;
1954 xport
= get_ofp_port(ctx
->xbridge
,
1955 ctx
->xin
->flow
.in_port
.ofp_port
);
1956 config
= xport
? xport
->config
: 0;
1959 /* Fall through to drop */
1960 case RULE_DPIF_LOOKUP_VERDICT_DROP
:
1961 config
= OFPUTIL_PC_NO_PACKET_IN
;
1963 case RULE_DPIF_LOOKUP_VERDICT_DEFAULT
:
1964 if (!ofproto_dpif_wants_packet_in_on_miss(ctx
->xbridge
->ofproto
)) {
1965 config
= OFPUTIL_PC_NO_PACKET_IN
;
1972 choose_miss_rule(config
, ctx
->xbridge
->miss_rule
,
1973 ctx
->xbridge
->no_packet_in_rule
, &rule
);
1977 xlate_recursively(ctx
, rule
);
1978 rule_dpif_unref(rule
);
1981 ctx
->table_id
= old_table_id
;
1989 xlate_group_bucket(struct xlate_ctx
*ctx
, const struct ofputil_bucket
*bucket
)
1991 uint64_t action_list_stub
[1024 / 8];
1992 struct ofpbuf action_list
, action_set
;
1994 ofpbuf_use_const(&action_set
, bucket
->ofpacts
, bucket
->ofpacts_len
);
1995 ofpbuf_use_stub(&action_list
, action_list_stub
, sizeof action_list_stub
);
1997 ofpacts_execute_action_set(&action_list
, &action_set
);
1999 do_xlate_actions(ofpbuf_data(&action_list
), ofpbuf_size(&action_list
), ctx
);
2002 ofpbuf_uninit(&action_set
);
2003 ofpbuf_uninit(&action_list
);
2007 xlate_all_group(struct xlate_ctx
*ctx
, struct group_dpif
*group
)
2009 const struct ofputil_bucket
*bucket
;
2010 const struct list
*buckets
;
2011 struct flow old_flow
= ctx
->xin
->flow
;
2013 group_dpif_get_buckets(group
, &buckets
);
2015 LIST_FOR_EACH (bucket
, list_node
, buckets
) {
2016 xlate_group_bucket(ctx
, bucket
);
2017 /* Roll back flow to previous state.
2018 * This is equivalent to cloning the packet for each bucket.
2020 * As a side effect any subsequently applied actions will
2021 * also effectively be applied to a clone of the packet taken
2022 * just before applying the all or indirect group. */
2023 ctx
->xin
->flow
= old_flow
;
2028 xlate_ff_group(struct xlate_ctx
*ctx
, struct group_dpif
*group
)
2030 const struct ofputil_bucket
*bucket
;
2032 bucket
= group_first_live_bucket(ctx
, group
, 0);
2034 xlate_group_bucket(ctx
, bucket
);
2039 xlate_select_group(struct xlate_ctx
*ctx
, struct group_dpif
*group
)
2041 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
2042 const struct ofputil_bucket
*bucket
;
2045 basis
= hash_mac(ctx
->xin
->flow
.dl_dst
, 0, 0);
2046 bucket
= group_best_live_bucket(ctx
, group
, basis
);
2048 memset(&wc
->masks
.dl_dst
, 0xff, sizeof wc
->masks
.dl_dst
);
2049 xlate_group_bucket(ctx
, bucket
);
2054 xlate_group_action__(struct xlate_ctx
*ctx
, struct group_dpif
*group
)
2056 ctx
->in_group
= true;
2058 switch (group_dpif_get_type(group
)) {
2060 case OFPGT11_INDIRECT
:
2061 xlate_all_group(ctx
, group
);
2063 case OFPGT11_SELECT
:
2064 xlate_select_group(ctx
, group
);
2067 xlate_ff_group(ctx
, group
);
2072 group_dpif_release(group
);
2074 ctx
->in_group
= false;
2078 xlate_group_resource_check(struct xlate_ctx
*ctx
)
2080 if (!xlate_resubmit_resource_check(ctx
)) {
2082 } else if (ctx
->in_group
) {
2083 /* Prevent nested translation of OpenFlow groups.
2085 * OpenFlow allows this restriction. We enforce this restriction only
2086 * because, with the current architecture, we would otherwise have to
2087 * take a possibly recursive read lock on the ofgroup rwlock, which is
2088 * unsafe given that POSIX allows taking a read lock to block if there
2089 * is a thread blocked on taking the write lock. Other solutions
2090 * without this restriction are also possible, but seem unwarranted
2091 * given the current limited use of groups. */
2092 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 1);
2094 VLOG_ERR_RL(&rl
, "cannot recursively translate OpenFlow group");
2102 xlate_group_action(struct xlate_ctx
*ctx
, uint32_t group_id
)
2104 if (xlate_group_resource_check(ctx
)) {
2105 struct group_dpif
*group
;
2108 got_group
= group_dpif_lookup(ctx
->xbridge
->ofproto
, group_id
, &group
);
2110 xlate_group_action__(ctx
, group
);
2120 xlate_ofpact_resubmit(struct xlate_ctx
*ctx
,
2121 const struct ofpact_resubmit
*resubmit
)
2125 bool may_packet_in
= false;
2126 bool honor_table_miss
= false;
2128 if (ctx
->rule
&& rule_dpif_is_internal(ctx
->rule
)) {
2129 /* Still allow missed packets to be sent to the controller
2130 * if resubmitting from an internal table. */
2131 may_packet_in
= true;
2132 honor_table_miss
= true;
2135 in_port
= resubmit
->in_port
;
2136 if (in_port
== OFPP_IN_PORT
) {
2137 in_port
= ctx
->xin
->flow
.in_port
.ofp_port
;
2140 table_id
= resubmit
->table_id
;
2141 if (table_id
== 255) {
2142 table_id
= ctx
->table_id
;
2145 xlate_table_action(ctx
, in_port
, table_id
, may_packet_in
,
2150 flood_packets(struct xlate_ctx
*ctx
, bool all
)
2152 const struct xport
*xport
;
2154 HMAP_FOR_EACH (xport
, ofp_node
, &ctx
->xbridge
->xports
) {
2155 if (xport
->ofp_port
== ctx
->xin
->flow
.in_port
.ofp_port
) {
2160 compose_output_action__(ctx
, xport
->ofp_port
, false);
2161 } else if (!(xport
->config
& OFPUTIL_PC_NO_FLOOD
)) {
2162 compose_output_action(ctx
, xport
->ofp_port
);
2166 ctx
->xout
->nf_output_iface
= NF_OUT_FLOOD
;
2170 execute_controller_action(struct xlate_ctx
*ctx
, int len
,
2171 enum ofp_packet_in_reason reason
,
2172 uint16_t controller_id
)
2174 struct ofproto_packet_in
*pin
;
2175 struct ofpbuf
*packet
;
2176 struct pkt_metadata md
= PKT_METADATA_INITIALIZER(0);
2178 ctx
->xout
->slow
|= SLOW_CONTROLLER
;
2179 if (!ctx
->xin
->packet
) {
2183 packet
= ofpbuf_clone(ctx
->xin
->packet
);
2185 ctx
->xout
->slow
|= commit_odp_actions(&ctx
->xin
->flow
, &ctx
->base_flow
,
2186 &ctx
->xout
->odp_actions
,
2189 odp_execute_actions(NULL
, packet
, false, &md
,
2190 ofpbuf_data(&ctx
->xout
->odp_actions
),
2191 ofpbuf_size(&ctx
->xout
->odp_actions
), NULL
);
2193 pin
= xmalloc(sizeof *pin
);
2194 pin
->up
.packet_len
= ofpbuf_size(packet
);
2195 pin
->up
.packet
= ofpbuf_steal_data(packet
);
2196 pin
->up
.reason
= reason
;
2197 pin
->up
.table_id
= ctx
->table_id
;
2198 pin
->up
.cookie
= (ctx
->rule
2199 ? rule_dpif_get_flow_cookie(ctx
->rule
)
2202 flow_get_metadata(&ctx
->xin
->flow
, &pin
->up
.fmd
);
2204 pin
->controller_id
= controller_id
;
2205 pin
->send_len
= len
;
2206 /* If a rule is a table-miss rule then this is
2207 * a table-miss handled by a table-miss rule.
2209 * Else, if rule is internal and has a controller action,
2210 * the later being implied by the rule being processed here,
2211 * then this is a table-miss handled without a table-miss rule.
2213 * Otherwise this is not a table-miss. */
2214 pin
->miss_type
= OFPROTO_PACKET_IN_NO_MISS
;
2216 if (rule_dpif_is_table_miss(ctx
->rule
)) {
2217 pin
->miss_type
= OFPROTO_PACKET_IN_MISS_FLOW
;
2218 } else if (rule_dpif_is_internal(ctx
->rule
)) {
2219 pin
->miss_type
= OFPROTO_PACKET_IN_MISS_WITHOUT_FLOW
;
2222 ofproto_dpif_send_packet_in(ctx
->xbridge
->ofproto
, pin
);
2223 ofpbuf_delete(packet
);
2227 compose_mpls_push_action(struct xlate_ctx
*ctx
, struct ofpact_push_mpls
*mpls
)
2229 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
2230 struct flow
*flow
= &ctx
->xin
->flow
;
2233 ovs_assert(eth_type_mpls(mpls
->ethertype
));
2235 n
= flow_count_mpls_labels(flow
, wc
);
2237 ctx
->xout
->slow
|= commit_odp_actions(flow
, &ctx
->base_flow
,
2238 &ctx
->xout
->odp_actions
,
2240 } else if (n
>= FLOW_MAX_MPLS_LABELS
) {
2241 if (ctx
->xin
->packet
!= NULL
) {
2242 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
2243 VLOG_WARN_RL(&rl
, "bridge %s: dropping packet on which an "
2244 "MPLS push action can't be performed as it would "
2245 "have more MPLS LSEs than the %d supported.",
2246 ctx
->xbridge
->name
, FLOW_MAX_MPLS_LABELS
);
2250 } else if (n
>= ctx
->xbridge
->max_mpls_depth
) {
2251 COVERAGE_INC(xlate_actions_mpls_overflow
);
2252 ctx
->xout
->slow
|= SLOW_ACTION
;
2255 flow_push_mpls(flow
, n
, mpls
->ethertype
, wc
);
2259 compose_mpls_pop_action(struct xlate_ctx
*ctx
, ovs_be16 eth_type
)
2261 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
2262 struct flow
*flow
= &ctx
->xin
->flow
;
2263 int n
= flow_count_mpls_labels(flow
, wc
);
2265 if (!flow_pop_mpls(flow
, n
, eth_type
, wc
) && n
>= FLOW_MAX_MPLS_LABELS
) {
2266 if (ctx
->xin
->packet
!= NULL
) {
2267 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
2268 VLOG_WARN_RL(&rl
, "bridge %s: dropping packet on which an "
2269 "MPLS pop action can't be performed as it has "
2270 "more MPLS LSEs than the %d supported.",
2271 ctx
->xbridge
->name
, FLOW_MAX_MPLS_LABELS
);
2274 ofpbuf_clear(&ctx
->xout
->odp_actions
);
2279 compose_dec_ttl(struct xlate_ctx
*ctx
, struct ofpact_cnt_ids
*ids
)
2281 struct flow
*flow
= &ctx
->xin
->flow
;
2283 if (!is_ip_any(flow
)) {
2287 ctx
->xout
->wc
.masks
.nw_ttl
= 0xff;
2288 if (flow
->nw_ttl
> 1) {
2294 for (i
= 0; i
< ids
->n_controllers
; i
++) {
2295 execute_controller_action(ctx
, UINT16_MAX
, OFPR_INVALID_TTL
,
2299 /* Stop processing for current table. */
2305 compose_set_mpls_label_action(struct xlate_ctx
*ctx
, ovs_be32 label
)
2307 if (eth_type_mpls(ctx
->xin
->flow
.dl_type
)) {
2308 ctx
->xout
->wc
.masks
.mpls_lse
[0] |= htonl(MPLS_LABEL_MASK
);
2309 set_mpls_lse_label(&ctx
->xin
->flow
.mpls_lse
[0], label
);
2314 compose_set_mpls_tc_action(struct xlate_ctx
*ctx
, uint8_t tc
)
2316 if (eth_type_mpls(ctx
->xin
->flow
.dl_type
)) {
2317 ctx
->xout
->wc
.masks
.mpls_lse
[0] |= htonl(MPLS_TC_MASK
);
2318 set_mpls_lse_tc(&ctx
->xin
->flow
.mpls_lse
[0], tc
);
2323 compose_set_mpls_ttl_action(struct xlate_ctx
*ctx
, uint8_t ttl
)
2325 if (eth_type_mpls(ctx
->xin
->flow
.dl_type
)) {
2326 ctx
->xout
->wc
.masks
.mpls_lse
[0] |= htonl(MPLS_TTL_MASK
);
2327 set_mpls_lse_ttl(&ctx
->xin
->flow
.mpls_lse
[0], ttl
);
2332 compose_dec_mpls_ttl_action(struct xlate_ctx
*ctx
)
2334 struct flow
*flow
= &ctx
->xin
->flow
;
2335 uint8_t ttl
= mpls_lse_to_ttl(flow
->mpls_lse
[0]);
2336 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
2338 memset(&wc
->masks
.mpls_lse
, 0xff, sizeof wc
->masks
.mpls_lse
);
2339 if (eth_type_mpls(flow
->dl_type
)) {
2342 set_mpls_lse_ttl(&flow
->mpls_lse
[0], ttl
);
2345 execute_controller_action(ctx
, UINT16_MAX
, OFPR_INVALID_TTL
, 0);
2347 /* Stop processing for current table. */
2356 xlate_output_action(struct xlate_ctx
*ctx
,
2357 ofp_port_t port
, uint16_t max_len
, bool may_packet_in
)
2359 ofp_port_t prev_nf_output_iface
= ctx
->xout
->nf_output_iface
;
2361 ctx
->xout
->nf_output_iface
= NF_OUT_DROP
;
2365 compose_output_action(ctx
, ctx
->xin
->flow
.in_port
.ofp_port
);
2368 xlate_table_action(ctx
, ctx
->xin
->flow
.in_port
.ofp_port
,
2369 0, may_packet_in
, true);
2375 flood_packets(ctx
, false);
2378 flood_packets(ctx
, true);
2380 case OFPP_CONTROLLER
:
2381 execute_controller_action(ctx
, max_len
, OFPR_ACTION
, 0);
2387 if (port
!= ctx
->xin
->flow
.in_port
.ofp_port
) {
2388 compose_output_action(ctx
, port
);
2390 xlate_report(ctx
, "skipping output to input port");
2395 if (prev_nf_output_iface
== NF_OUT_FLOOD
) {
2396 ctx
->xout
->nf_output_iface
= NF_OUT_FLOOD
;
2397 } else if (ctx
->xout
->nf_output_iface
== NF_OUT_DROP
) {
2398 ctx
->xout
->nf_output_iface
= prev_nf_output_iface
;
2399 } else if (prev_nf_output_iface
!= NF_OUT_DROP
&&
2400 ctx
->xout
->nf_output_iface
!= NF_OUT_FLOOD
) {
2401 ctx
->xout
->nf_output_iface
= NF_OUT_MULTI
;
2406 xlate_output_reg_action(struct xlate_ctx
*ctx
,
2407 const struct ofpact_output_reg
*or)
2409 uint64_t port
= mf_get_subfield(&or->src
, &ctx
->xin
->flow
);
2410 if (port
<= UINT16_MAX
) {
2411 union mf_subvalue value
;
2413 memset(&value
, 0xff, sizeof value
);
2414 mf_write_subfield_flow(&or->src
, &value
, &ctx
->xout
->wc
.masks
);
2415 xlate_output_action(ctx
, u16_to_ofp(port
),
2416 or->max_len
, false);
2421 xlate_enqueue_action(struct xlate_ctx
*ctx
,
2422 const struct ofpact_enqueue
*enqueue
)
2424 ofp_port_t ofp_port
= enqueue
->port
;
2425 uint32_t queue_id
= enqueue
->queue
;
2426 uint32_t flow_priority
, priority
;
2429 /* Translate queue to priority. */
2430 error
= dpif_queue_to_priority(ctx
->xbridge
->dpif
, queue_id
, &priority
);
2432 /* Fall back to ordinary output action. */
2433 xlate_output_action(ctx
, enqueue
->port
, 0, false);
2437 /* Check output port. */
2438 if (ofp_port
== OFPP_IN_PORT
) {
2439 ofp_port
= ctx
->xin
->flow
.in_port
.ofp_port
;
2440 } else if (ofp_port
== ctx
->xin
->flow
.in_port
.ofp_port
) {
2444 /* Add datapath actions. */
2445 flow_priority
= ctx
->xin
->flow
.skb_priority
;
2446 ctx
->xin
->flow
.skb_priority
= priority
;
2447 compose_output_action(ctx
, ofp_port
);
2448 ctx
->xin
->flow
.skb_priority
= flow_priority
;
2450 /* Update NetFlow output port. */
2451 if (ctx
->xout
->nf_output_iface
== NF_OUT_DROP
) {
2452 ctx
->xout
->nf_output_iface
= ofp_port
;
2453 } else if (ctx
->xout
->nf_output_iface
!= NF_OUT_FLOOD
) {
2454 ctx
->xout
->nf_output_iface
= NF_OUT_MULTI
;
2459 xlate_set_queue_action(struct xlate_ctx
*ctx
, uint32_t queue_id
)
2461 uint32_t skb_priority
;
2463 if (!dpif_queue_to_priority(ctx
->xbridge
->dpif
, queue_id
, &skb_priority
)) {
2464 ctx
->xin
->flow
.skb_priority
= skb_priority
;
2466 /* Couldn't translate queue to a priority. Nothing to do. A warning
2467 * has already been logged. */
2472 slave_enabled_cb(ofp_port_t ofp_port
, void *xbridge_
)
2474 const struct xbridge
*xbridge
= xbridge_
;
2485 case OFPP_CONTROLLER
: /* Not supported by the bundle action. */
2488 port
= get_ofp_port(xbridge
, ofp_port
);
2489 return port
? port
->may_enable
: false;
2494 xlate_bundle_action(struct xlate_ctx
*ctx
,
2495 const struct ofpact_bundle
*bundle
)
2499 port
= bundle_execute(bundle
, &ctx
->xin
->flow
, &ctx
->xout
->wc
,
2501 CONST_CAST(struct xbridge
*, ctx
->xbridge
));
2502 if (bundle
->dst
.field
) {
2503 nxm_reg_load(&bundle
->dst
, ofp_to_u16(port
), &ctx
->xin
->flow
,
2506 xlate_output_action(ctx
, port
, 0, false);
2511 xlate_learn_action(struct xlate_ctx
*ctx
,
2512 const struct ofpact_learn
*learn
)
2514 uint64_t ofpacts_stub
[1024 / 8];
2515 struct ofputil_flow_mod fm
;
2516 struct ofpbuf ofpacts
;
2518 ctx
->xout
->has_learn
= true;
2520 learn_mask(learn
, &ctx
->xout
->wc
);
2522 if (!ctx
->xin
->may_learn
) {
2526 ofpbuf_use_stub(&ofpacts
, ofpacts_stub
, sizeof ofpacts_stub
);
2527 learn_execute(learn
, &ctx
->xin
->flow
, &fm
, &ofpacts
);
2528 ofproto_dpif_flow_mod(ctx
->xbridge
->ofproto
, &fm
);
2529 ofpbuf_uninit(&ofpacts
);
2533 xlate_fin_timeout(struct xlate_ctx
*ctx
,
2534 const struct ofpact_fin_timeout
*oft
)
2536 if (ctx
->xin
->tcp_flags
& (TCP_FIN
| TCP_RST
) && ctx
->rule
) {
2537 rule_dpif_reduce_timeouts(ctx
->rule
, oft
->fin_idle_timeout
,
2538 oft
->fin_hard_timeout
);
2543 xlate_sample_action(struct xlate_ctx
*ctx
,
2544 const struct ofpact_sample
*os
)
2546 union user_action_cookie cookie
;
2547 /* Scale the probability from 16-bit to 32-bit while representing
2548 * the same percentage. */
2549 uint32_t probability
= (os
->probability
<< 16) | os
->probability
;
2551 if (!ctx
->xbridge
->variable_length_userdata
) {
2552 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 1);
2554 VLOG_ERR_RL(&rl
, "ignoring NXAST_SAMPLE action because datapath "
2555 "lacks support (needs Linux 3.10+ or kernel module from "
2560 ctx
->xout
->slow
|= commit_odp_actions(&ctx
->xin
->flow
, &ctx
->base_flow
,
2561 &ctx
->xout
->odp_actions
,
2564 compose_flow_sample_cookie(os
->probability
, os
->collector_set_id
,
2565 os
->obs_domain_id
, os
->obs_point_id
, &cookie
);
2566 compose_sample_action(ctx
->xbridge
, &ctx
->xout
->odp_actions
, &ctx
->xin
->flow
,
2567 probability
, &cookie
, sizeof cookie
.flow_sample
);
2571 may_receive(const struct xport
*xport
, struct xlate_ctx
*ctx
)
2573 if (xport
->config
& (eth_addr_equals(ctx
->xin
->flow
.dl_dst
, eth_addr_stp
)
2574 ? OFPUTIL_PC_NO_RECV_STP
2575 : OFPUTIL_PC_NO_RECV
)) {
2579 /* Only drop packets here if both forwarding and learning are
2580 * disabled. If just learning is enabled, we need to have
2581 * OFPP_NORMAL and the learning action have a look at the packet
2582 * before we can drop it. */
2583 if (!xport_stp_forward_state(xport
) && !xport_stp_learn_state(xport
)) {
2591 xlate_write_actions(struct xlate_ctx
*ctx
, const struct ofpact
*a
)
2593 struct ofpact_nest
*on
= ofpact_get_WRITE_ACTIONS(a
);
2594 ofpbuf_put(&ctx
->action_set
, on
->actions
, ofpact_nest_get_action_len(on
));
2595 ofpact_pad(&ctx
->action_set
);
2599 xlate_action_set(struct xlate_ctx
*ctx
)
2601 uint64_t action_list_stub
[1024 / 64];
2602 struct ofpbuf action_list
;
2604 ofpbuf_use_stub(&action_list
, action_list_stub
, sizeof action_list_stub
);
2605 ofpacts_execute_action_set(&action_list
, &ctx
->action_set
);
2606 do_xlate_actions(ofpbuf_data(&action_list
), ofpbuf_size(&action_list
), ctx
);
2607 ofpbuf_uninit(&action_list
);
2611 do_xlate_actions(const struct ofpact
*ofpacts
, size_t ofpacts_len
,
2612 struct xlate_ctx
*ctx
)
2614 struct flow_wildcards
*wc
= &ctx
->xout
->wc
;
2615 struct flow
*flow
= &ctx
->xin
->flow
;
2616 const struct ofpact
*a
;
2618 /* dl_type already in the mask, not set below. */
2620 OFPACT_FOR_EACH (a
, ofpacts
, ofpacts_len
) {
2621 struct ofpact_controller
*controller
;
2622 const struct ofpact_metadata
*metadata
;
2623 const struct ofpact_set_field
*set_field
;
2624 const struct mf_field
*mf
;
2632 xlate_output_action(ctx
, ofpact_get_OUTPUT(a
)->port
,
2633 ofpact_get_OUTPUT(a
)->max_len
, true);
2637 if (xlate_group_action(ctx
, ofpact_get_GROUP(a
)->group_id
)) {
2642 case OFPACT_CONTROLLER
:
2643 controller
= ofpact_get_CONTROLLER(a
);
2644 execute_controller_action(ctx
, controller
->max_len
,
2646 controller
->controller_id
);
2649 case OFPACT_ENQUEUE
:
2650 xlate_enqueue_action(ctx
, ofpact_get_ENQUEUE(a
));
2653 case OFPACT_SET_VLAN_VID
:
2654 wc
->masks
.vlan_tci
|= htons(VLAN_VID_MASK
| VLAN_CFI
);
2655 if (flow
->vlan_tci
& htons(VLAN_CFI
) ||
2656 ofpact_get_SET_VLAN_VID(a
)->push_vlan_if_needed
) {
2657 flow
->vlan_tci
&= ~htons(VLAN_VID_MASK
);
2658 flow
->vlan_tci
|= (htons(ofpact_get_SET_VLAN_VID(a
)->vlan_vid
)
2663 case OFPACT_SET_VLAN_PCP
:
2664 wc
->masks
.vlan_tci
|= htons(VLAN_PCP_MASK
| VLAN_CFI
);
2665 if (flow
->vlan_tci
& htons(VLAN_CFI
) ||
2666 ofpact_get_SET_VLAN_PCP(a
)->push_vlan_if_needed
) {
2667 flow
->vlan_tci
&= ~htons(VLAN_PCP_MASK
);
2668 flow
->vlan_tci
|= htons((ofpact_get_SET_VLAN_PCP(a
)->vlan_pcp
2669 << VLAN_PCP_SHIFT
) | VLAN_CFI
);
2673 case OFPACT_STRIP_VLAN
:
2674 memset(&wc
->masks
.vlan_tci
, 0xff, sizeof wc
->masks
.vlan_tci
);
2675 flow
->vlan_tci
= htons(0);
2678 case OFPACT_PUSH_VLAN
:
2679 /* XXX 802.1AD(QinQ) */
2680 memset(&wc
->masks
.vlan_tci
, 0xff, sizeof wc
->masks
.vlan_tci
);
2681 flow
->vlan_tci
= htons(VLAN_CFI
);
2684 case OFPACT_SET_ETH_SRC
:
2685 memset(&wc
->masks
.dl_src
, 0xff, sizeof wc
->masks
.dl_src
);
2686 memcpy(flow
->dl_src
, ofpact_get_SET_ETH_SRC(a
)->mac
, ETH_ADDR_LEN
);
2689 case OFPACT_SET_ETH_DST
:
2690 memset(&wc
->masks
.dl_dst
, 0xff, sizeof wc
->masks
.dl_dst
);
2691 memcpy(flow
->dl_dst
, ofpact_get_SET_ETH_DST(a
)->mac
, ETH_ADDR_LEN
);
2694 case OFPACT_SET_IPV4_SRC
:
2695 if (flow
->dl_type
== htons(ETH_TYPE_IP
)) {
2696 memset(&wc
->masks
.nw_src
, 0xff, sizeof wc
->masks
.nw_src
);
2697 flow
->nw_src
= ofpact_get_SET_IPV4_SRC(a
)->ipv4
;
2701 case OFPACT_SET_IPV4_DST
:
2702 if (flow
->dl_type
== htons(ETH_TYPE_IP
)) {
2703 memset(&wc
->masks
.nw_dst
, 0xff, sizeof wc
->masks
.nw_dst
);
2704 flow
->nw_dst
= ofpact_get_SET_IPV4_DST(a
)->ipv4
;
2708 case OFPACT_SET_IP_DSCP
:
2709 if (is_ip_any(flow
)) {
2710 wc
->masks
.nw_tos
|= IP_DSCP_MASK
;
2711 flow
->nw_tos
&= ~IP_DSCP_MASK
;
2712 flow
->nw_tos
|= ofpact_get_SET_IP_DSCP(a
)->dscp
;
2716 case OFPACT_SET_IP_ECN
:
2717 if (is_ip_any(flow
)) {
2718 wc
->masks
.nw_tos
|= IP_ECN_MASK
;
2719 flow
->nw_tos
&= ~IP_ECN_MASK
;
2720 flow
->nw_tos
|= ofpact_get_SET_IP_ECN(a
)->ecn
;
2724 case OFPACT_SET_IP_TTL
:
2725 if (is_ip_any(flow
)) {
2726 wc
->masks
.nw_ttl
= 0xff;
2727 flow
->nw_ttl
= ofpact_get_SET_IP_TTL(a
)->ttl
;
2731 case OFPACT_SET_L4_SRC_PORT
:
2732 if (is_ip_any(flow
)) {
2733 memset(&wc
->masks
.nw_proto
, 0xff, sizeof wc
->masks
.nw_proto
);
2734 memset(&wc
->masks
.tp_src
, 0xff, sizeof wc
->masks
.tp_src
);
2735 flow
->tp_src
= htons(ofpact_get_SET_L4_SRC_PORT(a
)->port
);
2739 case OFPACT_SET_L4_DST_PORT
:
2740 if (is_ip_any(flow
)) {
2741 memset(&wc
->masks
.nw_proto
, 0xff, sizeof wc
->masks
.nw_proto
);
2742 memset(&wc
->masks
.tp_dst
, 0xff, sizeof wc
->masks
.tp_dst
);
2743 flow
->tp_dst
= htons(ofpact_get_SET_L4_DST_PORT(a
)->port
);
2747 case OFPACT_RESUBMIT
:
2748 xlate_ofpact_resubmit(ctx
, ofpact_get_RESUBMIT(a
));
2751 case OFPACT_SET_TUNNEL
:
2752 flow
->tunnel
.tun_id
= htonll(ofpact_get_SET_TUNNEL(a
)->tun_id
);
2755 case OFPACT_SET_QUEUE
:
2756 xlate_set_queue_action(ctx
, ofpact_get_SET_QUEUE(a
)->queue_id
);
2759 case OFPACT_POP_QUEUE
:
2760 flow
->skb_priority
= ctx
->orig_skb_priority
;
2763 case OFPACT_REG_MOVE
:
2764 nxm_execute_reg_move(ofpact_get_REG_MOVE(a
), flow
, wc
);
2767 case OFPACT_REG_LOAD
:
2768 nxm_execute_reg_load(ofpact_get_REG_LOAD(a
), flow
, wc
);
2771 case OFPACT_SET_FIELD
:
2772 set_field
= ofpact_get_SET_FIELD(a
);
2773 mf
= set_field
->field
;
2774 mf_mask_field_and_prereqs(mf
, &wc
->masks
);
2776 /* Set field action only ever overwrites packet's outermost
2777 * applicable header fields. Do nothing if no header exists. */
2778 if ((mf
->id
!= MFF_VLAN_VID
|| flow
->vlan_tci
& htons(VLAN_CFI
))
2779 && ((mf
->id
!= MFF_MPLS_LABEL
&& mf
->id
!= MFF_MPLS_TC
)
2780 || eth_type_mpls(flow
->dl_type
))) {
2781 mf_set_flow_value(mf
, &set_field
->value
, flow
);
2785 case OFPACT_STACK_PUSH
:
2786 nxm_execute_stack_push(ofpact_get_STACK_PUSH(a
), flow
, wc
,
2790 case OFPACT_STACK_POP
:
2791 nxm_execute_stack_pop(ofpact_get_STACK_POP(a
), flow
, wc
,
2795 case OFPACT_PUSH_MPLS
:
2796 compose_mpls_push_action(ctx
, ofpact_get_PUSH_MPLS(a
));
2799 case OFPACT_POP_MPLS
:
2800 compose_mpls_pop_action(ctx
, ofpact_get_POP_MPLS(a
)->ethertype
);
2803 case OFPACT_SET_MPLS_LABEL
:
2804 compose_set_mpls_label_action(
2805 ctx
, ofpact_get_SET_MPLS_LABEL(a
)->label
);
2808 case OFPACT_SET_MPLS_TC
:
2809 compose_set_mpls_tc_action(ctx
, ofpact_get_SET_MPLS_TC(a
)->tc
);
2812 case OFPACT_SET_MPLS_TTL
:
2813 compose_set_mpls_ttl_action(ctx
, ofpact_get_SET_MPLS_TTL(a
)->ttl
);
2816 case OFPACT_DEC_MPLS_TTL
:
2817 if (compose_dec_mpls_ttl_action(ctx
)) {
2822 case OFPACT_DEC_TTL
:
2823 wc
->masks
.nw_ttl
= 0xff;
2824 if (compose_dec_ttl(ctx
, ofpact_get_DEC_TTL(a
))) {
2830 /* Nothing to do. */
2833 case OFPACT_MULTIPATH
:
2834 multipath_execute(ofpact_get_MULTIPATH(a
), flow
, wc
);
2838 xlate_bundle_action(ctx
, ofpact_get_BUNDLE(a
));
2841 case OFPACT_OUTPUT_REG
:
2842 xlate_output_reg_action(ctx
, ofpact_get_OUTPUT_REG(a
));
2846 xlate_learn_action(ctx
, ofpact_get_LEARN(a
));
2853 case OFPACT_FIN_TIMEOUT
:
2854 memset(&wc
->masks
.nw_proto
, 0xff, sizeof wc
->masks
.nw_proto
);
2855 ctx
->xout
->has_fin_timeout
= true;
2856 xlate_fin_timeout(ctx
, ofpact_get_FIN_TIMEOUT(a
));
2859 case OFPACT_CLEAR_ACTIONS
:
2860 ofpbuf_clear(&ctx
->action_set
);
2863 case OFPACT_WRITE_ACTIONS
:
2864 xlate_write_actions(ctx
, a
);
2867 case OFPACT_WRITE_METADATA
:
2868 metadata
= ofpact_get_WRITE_METADATA(a
);
2869 flow
->metadata
&= ~metadata
->mask
;
2870 flow
->metadata
|= metadata
->metadata
& metadata
->mask
;
2874 /* Not implemented yet. */
2877 case OFPACT_GOTO_TABLE
: {
2878 struct ofpact_goto_table
*ogt
= ofpact_get_GOTO_TABLE(a
);
2880 ovs_assert(ctx
->table_id
< ogt
->table_id
);
2881 xlate_table_action(ctx
, ctx
->xin
->flow
.in_port
.ofp_port
,
2882 ogt
->table_id
, true, true);
2887 xlate_sample_action(ctx
, ofpact_get_SAMPLE(a
));
2894 xlate_in_init(struct xlate_in
*xin
, struct ofproto_dpif
*ofproto
,
2895 const struct flow
*flow
, struct rule_dpif
*rule
,
2896 uint16_t tcp_flags
, const struct ofpbuf
*packet
)
2898 xin
->ofproto
= ofproto
;
2900 xin
->packet
= packet
;
2901 xin
->may_learn
= packet
!= NULL
;
2903 xin
->ofpacts
= NULL
;
2904 xin
->ofpacts_len
= 0;
2905 xin
->tcp_flags
= tcp_flags
;
2906 xin
->resubmit_hook
= NULL
;
2907 xin
->report_hook
= NULL
;
2908 xin
->resubmit_stats
= NULL
;
2909 xin
->skip_wildcards
= false;
2913 xlate_out_uninit(struct xlate_out
*xout
)
2916 ofpbuf_uninit(&xout
->odp_actions
);
2920 /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts'
2921 * into datapath actions, using 'ctx', and discards the datapath actions. */
2923 xlate_actions_for_side_effects(struct xlate_in
*xin
)
2925 struct xlate_out xout
;
2927 xlate_actions(xin
, &xout
);
2928 xlate_out_uninit(&xout
);
2932 xlate_report(struct xlate_ctx
*ctx
, const char *s
)
2934 if (ctx
->xin
->report_hook
) {
2935 ctx
->xin
->report_hook(ctx
->xin
, s
, ctx
->recurse
);
2940 xlate_out_copy(struct xlate_out
*dst
, const struct xlate_out
*src
)
2943 dst
->slow
= src
->slow
;
2944 dst
->has_learn
= src
->has_learn
;
2945 dst
->has_normal
= src
->has_normal
;
2946 dst
->has_fin_timeout
= src
->has_fin_timeout
;
2947 dst
->nf_output_iface
= src
->nf_output_iface
;
2948 dst
->mirrors
= src
->mirrors
;
2950 ofpbuf_use_stub(&dst
->odp_actions
, dst
->odp_actions_stub
,
2951 sizeof dst
->odp_actions_stub
);
2952 ofpbuf_put(&dst
->odp_actions
, ofpbuf_data(&src
->odp_actions
),
2953 ofpbuf_size(&src
->odp_actions
));
2956 static struct skb_priority_to_dscp
*
2957 get_skb_priority(const struct xport
*xport
, uint32_t skb_priority
)
2959 struct skb_priority_to_dscp
*pdscp
;
2962 hash
= hash_int(skb_priority
, 0);
2963 HMAP_FOR_EACH_IN_BUCKET (pdscp
, hmap_node
, hash
, &xport
->skb_priorities
) {
2964 if (pdscp
->skb_priority
== skb_priority
) {
2972 dscp_from_skb_priority(const struct xport
*xport
, uint32_t skb_priority
,
2975 struct skb_priority_to_dscp
*pdscp
= get_skb_priority(xport
, skb_priority
);
2976 *dscp
= pdscp
? pdscp
->dscp
: 0;
2977 return pdscp
!= NULL
;
2981 clear_skb_priorities(struct xport
*xport
)
2983 struct skb_priority_to_dscp
*pdscp
, *next
;
2985 HMAP_FOR_EACH_SAFE (pdscp
, next
, hmap_node
, &xport
->skb_priorities
) {
2986 hmap_remove(&xport
->skb_priorities
, &pdscp
->hmap_node
);
2992 actions_output_to_local_port(const struct xlate_ctx
*ctx
)
2994 odp_port_t local_odp_port
= ofp_port_to_odp_port(ctx
->xbridge
, OFPP_LOCAL
);
2995 const struct nlattr
*a
;
2998 NL_ATTR_FOR_EACH_UNSAFE (a
, left
, ofpbuf_data(&ctx
->xout
->odp_actions
),
2999 ofpbuf_size(&ctx
->xout
->odp_actions
)) {
3000 if (nl_attr_type(a
) == OVS_ACTION_ATTR_OUTPUT
3001 && nl_attr_get_odp_port(a
) == local_odp_port
) {
3008 /* Thread safe call to xlate_actions__(). */
3010 xlate_actions(struct xlate_in
*xin
, struct xlate_out
*xout
)
3011 OVS_EXCLUDED(xlate_rwlock
)
3013 ovs_rwlock_rdlock(&xlate_rwlock
);
3014 xlate_actions__(xin
, xout
);
3015 ovs_rwlock_unlock(&xlate_rwlock
);
3018 /* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts'
3019 * into datapath actions in 'odp_actions', using 'ctx'.
3021 * The caller must take responsibility for eventually freeing 'xout', with
3022 * xlate_out_uninit(). */
3024 xlate_actions__(struct xlate_in
*xin
, struct xlate_out
*xout
)
3025 OVS_REQ_RDLOCK(xlate_rwlock
)
3027 struct flow_wildcards
*wc
= &xout
->wc
;
3028 struct flow
*flow
= &xin
->flow
;
3029 struct rule_dpif
*rule
= NULL
;
3031 struct rule_actions
*actions
= NULL
;
3032 enum slow_path_reason special
;
3033 const struct ofpact
*ofpacts
;
3034 struct xport
*in_port
;
3035 struct flow orig_flow
;
3036 struct xlate_ctx ctx
;
3041 COVERAGE_INC(xlate_actions
);
3043 /* Flow initialization rules:
3044 * - 'base_flow' must match the kernel's view of the packet at the
3045 * time that action processing starts. 'flow' represents any
3046 * transformations we wish to make through actions.
3047 * - By default 'base_flow' and 'flow' are the same since the input
3048 * packet matches the output before any actions are applied.
3049 * - When using VLAN splinters, 'base_flow''s VLAN is set to the value
3050 * of the received packet as seen by the kernel. If we later output
3051 * to another device without any modifications this will cause us to
3052 * insert a new tag since the original one was stripped off by the
3054 * - Tunnel metadata as received is retained in 'flow'. This allows
3055 * tunnel metadata matching also in later tables.
3056 * Since a kernel action for setting the tunnel metadata will only be
3057 * generated with actual tunnel output, changing the tunnel metadata
3058 * values in 'flow' (such as tun_id) will only have effect with a later
3059 * tunnel output action.
3060 * - Tunnel 'base_flow' is completely cleared since that is what the
3061 * kernel does. If we wish to maintain the original values an action
3062 * needs to be generated. */
3067 ctx
.xout
->has_learn
= false;
3068 ctx
.xout
->has_normal
= false;
3069 ctx
.xout
->has_fin_timeout
= false;
3070 ctx
.xout
->nf_output_iface
= NF_OUT_DROP
;
3071 ctx
.xout
->mirrors
= 0;
3072 ofpbuf_use_stub(&ctx
.xout
->odp_actions
, ctx
.xout
->odp_actions_stub
,
3073 sizeof ctx
.xout
->odp_actions_stub
);
3074 ofpbuf_reserve(&ctx
.xout
->odp_actions
, NL_A_U32_SIZE
);
3076 ctx
.xbridge
= xbridge_lookup(xin
->ofproto
);
3081 ctx
.rule
= xin
->rule
;
3083 ctx
.base_flow
= *flow
;
3084 memset(&ctx
.base_flow
.tunnel
, 0, sizeof ctx
.base_flow
.tunnel
);
3085 ctx
.orig_tunnel_ip_dst
= flow
->tunnel
.ip_dst
;
3087 flow_wildcards_init_catchall(wc
);
3088 memset(&wc
->masks
.in_port
, 0xff, sizeof wc
->masks
.in_port
);
3089 memset(&wc
->masks
.skb_priority
, 0xff, sizeof wc
->masks
.skb_priority
);
3090 memset(&wc
->masks
.dl_type
, 0xff, sizeof wc
->masks
.dl_type
);
3091 if (is_ip_any(flow
)) {
3092 wc
->masks
.nw_frag
|= FLOW_NW_FRAG_MASK
;
3094 is_icmp
= is_icmpv4(flow
) || is_icmpv6(flow
);
3096 tnl_may_send
= tnl_xlate_init(&ctx
.base_flow
, flow
, wc
);
3097 if (ctx
.xbridge
->netflow
) {
3098 netflow_mask_wc(flow
, wc
);
3103 ctx
.in_group
= false;
3104 ctx
.orig_skb_priority
= flow
->skb_priority
;
3108 if (!xin
->ofpacts
&& !ctx
.rule
) {
3109 ctx
.table_id
= rule_dpif_lookup(ctx
.xbridge
->ofproto
, flow
,
3110 !xin
->skip_wildcards
? wc
: NULL
,
3112 if (ctx
.xin
->resubmit_stats
) {
3113 rule_dpif_credit_stats(rule
, ctx
.xin
->resubmit_stats
);
3117 xout
->fail_open
= ctx
.rule
&& rule_dpif_is_fail_open(ctx
.rule
);
3118 xout
->use_recirc
= false;
3121 ofpacts
= xin
->ofpacts
;
3122 ofpacts_len
= xin
->ofpacts_len
;
3123 } else if (ctx
.rule
) {
3124 actions
= rule_dpif_get_actions(ctx
.rule
);
3125 ofpacts
= actions
->ofpacts
;
3126 ofpacts_len
= actions
->ofpacts_len
;
3131 ofpbuf_use_stub(&ctx
.stack
, ctx
.init_stack
, sizeof ctx
.init_stack
);
3132 ofpbuf_use_stub(&ctx
.action_set
,
3133 ctx
.action_set_stub
, sizeof ctx
.action_set_stub
);
3135 if (mbridge_has_mirrors(ctx
.xbridge
->mbridge
)) {
3136 /* Do this conditionally because the copy is expensive enough that it
3137 * shows up in profiles. */
3141 if (flow
->nw_frag
& FLOW_NW_FRAG_ANY
) {
3142 switch (ctx
.xbridge
->frag
) {
3143 case OFPC_FRAG_NORMAL
:
3144 /* We must pretend that transport ports are unavailable. */
3145 flow
->tp_src
= ctx
.base_flow
.tp_src
= htons(0);
3146 flow
->tp_dst
= ctx
.base_flow
.tp_dst
= htons(0);
3149 case OFPC_FRAG_DROP
:
3152 case OFPC_FRAG_REASM
:
3155 case OFPC_FRAG_NX_MATCH
:
3156 /* Nothing to do. */
3159 case OFPC_INVALID_TTL_TO_CONTROLLER
:
3164 in_port
= get_ofp_port(ctx
.xbridge
, flow
->in_port
.ofp_port
);
3165 if (in_port
&& in_port
->is_tunnel
&& ctx
.xin
->resubmit_stats
) {
3166 netdev_vport_inc_rx(in_port
->netdev
, ctx
.xin
->resubmit_stats
);
3168 bfd_account_rx(in_port
->bfd
, ctx
.xin
->resubmit_stats
);
3172 special
= process_special(&ctx
, flow
, in_port
, ctx
.xin
->packet
);
3174 ctx
.xout
->slow
|= special
;
3176 size_t sample_actions_len
;
3178 if (flow
->in_port
.ofp_port
3179 != vsp_realdev_to_vlandev(ctx
.xbridge
->ofproto
,
3180 flow
->in_port
.ofp_port
,
3182 ctx
.base_flow
.vlan_tci
= 0;
3185 add_sflow_action(&ctx
);
3186 add_ipfix_action(&ctx
);
3187 sample_actions_len
= ofpbuf_size(&ctx
.xout
->odp_actions
);
3189 if (tnl_may_send
&& (!in_port
|| may_receive(in_port
, &ctx
))) {
3190 do_xlate_actions(ofpacts
, ofpacts_len
, &ctx
);
3192 /* We've let OFPP_NORMAL and the learning action look at the
3193 * packet, so drop it now if forwarding is disabled. */
3194 if (in_port
&& !xport_stp_forward_state(in_port
)) {
3195 ofpbuf_set_size(&ctx
.xout
->odp_actions
, sample_actions_len
);
3199 if (ofpbuf_size(&ctx
.action_set
)) {
3200 xlate_action_set(&ctx
);
3203 if (ctx
.xbridge
->has_in_band
3204 && in_band_must_output_to_local_port(flow
)
3205 && !actions_output_to_local_port(&ctx
)) {
3206 compose_output_action(&ctx
, OFPP_LOCAL
);
3209 fix_sflow_action(&ctx
);
3211 if (mbridge_has_mirrors(ctx
.xbridge
->mbridge
)) {
3212 add_mirror_actions(&ctx
, &orig_flow
);
3216 if (nl_attr_oversized(ofpbuf_size(&ctx
.xout
->odp_actions
))) {
3217 /* These datapath actions are too big for a Netlink attribute, so we
3218 * can't hand them to the kernel directly. dpif_execute() can execute
3219 * them one by one with help, so just mark the result as SLOW_ACTION to
3220 * prevent the flow from being installed. */
3221 COVERAGE_INC(xlate_actions_oversize
);
3222 ctx
.xout
->slow
|= SLOW_ACTION
;
3225 if (ctx
.xin
->resubmit_stats
) {
3226 mirror_update_stats(ctx
.xbridge
->mbridge
, xout
->mirrors
,
3227 ctx
.xin
->resubmit_stats
->n_packets
,
3228 ctx
.xin
->resubmit_stats
->n_bytes
);
3230 if (ctx
.xbridge
->netflow
) {
3231 const struct ofpact
*ofpacts
;
3234 ofpacts_len
= actions
->ofpacts_len
;
3235 ofpacts
= actions
->ofpacts
;
3236 if (ofpacts_len
== 0
3237 || ofpacts
->type
!= OFPACT_CONTROLLER
3238 || ofpact_next(ofpacts
) < ofpact_end(ofpacts
, ofpacts_len
)) {
3239 /* Only update netflow if we don't have controller flow. We don't
3240 * report NetFlow expiration messages for such facets because they
3241 * are just part of the control logic for the network, not real
3243 netflow_flow_update(ctx
.xbridge
->netflow
, flow
,
3244 xout
->nf_output_iface
,
3245 ctx
.xin
->resubmit_stats
);
3250 ofpbuf_uninit(&ctx
.stack
);
3251 ofpbuf_uninit(&ctx
.action_set
);
3253 /* Clear the metadata and register wildcard masks, because we won't
3254 * use non-header fields as part of the cache. */
3255 flow_wildcards_clear_non_packet_fields(wc
);
3257 /* ICMPv4 and ICMPv6 have 8-bit "type" and "code" fields. struct flow uses
3258 * the low 8 bits of the 16-bit tp_src and tp_dst members to represent
3259 * these fields. The datapath interface, on the other hand, represents
3260 * them with just 8 bits each. This means that if the high 8 bits of the
3261 * masks for these fields somehow become set, then they will get chopped
3262 * off by a round trip through the datapath, and revalidation will spot
3263 * that as an inconsistency and delete the flow. Avoid the problem here by
3264 * making sure that only the low 8 bits of either field can be unwildcarded
3268 wc
->masks
.tp_src
&= htons(UINT8_MAX
);
3269 wc
->masks
.tp_dst
&= htons(UINT8_MAX
);
3273 rule_dpif_unref(rule
);
3276 /* Sends 'packet' out 'ofport'.
3277 * May modify 'packet'.
3278 * Returns 0 if successful, otherwise a positive errno value. */
3280 xlate_send_packet(const struct ofport_dpif
*ofport
, struct ofpbuf
*packet
)
3282 struct xport
*xport
;
3283 struct ofpact_output output
;
3286 ofpact_init(&output
.ofpact
, OFPACT_OUTPUT
, sizeof output
);
3287 /* Use OFPP_NONE as the in_port to avoid special packet processing. */
3288 flow_extract(packet
, NULL
, &flow
);
3289 flow
.in_port
.ofp_port
= OFPP_NONE
;
3291 ovs_rwlock_rdlock(&xlate_rwlock
);
3292 xport
= xport_lookup(ofport
);
3294 ovs_rwlock_unlock(&xlate_rwlock
);
3297 output
.port
= xport
->ofp_port
;
3299 ovs_rwlock_unlock(&xlate_rwlock
);
3301 return ofproto_dpif_execute_actions(xport
->xbridge
->ofproto
, &flow
, NULL
,
3302 &output
.ofpact
, sizeof output
,