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