1 /* Copyright (c) 2009-2017, 2019-2020 Nicira, Inc.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License. */
17 #include "ofproto/ofproto-dpif-xlate.h"
20 #include <sys/types.h>
21 #include <netinet/in.h>
22 #include <arpa/inet.h>
24 #include <sys/socket.h>
30 #include "byte-order.h"
35 #include "dp-packet.h"
40 #include "mac-learning.h"
41 #include "mcast-snooping.h"
42 #include "multipath.h"
43 #include "netdev-vport.h"
46 #include "odp-execute.h"
47 #include "ofproto/ofproto-dpif-ipfix.h"
48 #include "ofproto/ofproto-dpif-mirror.h"
49 #include "ofproto/ofproto-dpif-monitor.h"
50 #include "ofproto/ofproto-dpif-sflow.h"
51 #include "ofproto/ofproto-dpif-trace.h"
52 #include "ofproto/ofproto-dpif-xlate-cache.h"
53 #include "ofproto/ofproto-dpif.h"
54 #include "ofproto/ofproto-provider.h"
55 #include "openvswitch/dynamic-string.h"
56 #include "openvswitch/meta-flow.h"
57 #include "openvswitch/list.h"
58 #include "openvswitch/ofp-actions.h"
59 #include "openvswitch/ofp-ed-props.h"
60 #include "openvswitch/vlog.h"
62 #include "ovs-router.h"
64 #include "tnl-neigh-cache.h"
65 #include "tnl-ports.h"
70 COVERAGE_DEFINE(xlate_actions
);
71 COVERAGE_DEFINE(xlate_actions_oversize
);
72 COVERAGE_DEFINE(xlate_actions_too_many_output
);
74 VLOG_DEFINE_THIS_MODULE(ofproto_dpif_xlate
);
76 /* Maximum depth of flow table recursion (due to resubmit actions) in a
79 * The goal of limiting the depth of resubmits is to ensure that flow
80 * translation eventually terminates. Only resubmits to the same table or an
81 * earlier table count against the maximum depth. This is because resubmits to
82 * strictly monotonically increasing table IDs will eventually terminate, since
83 * any OpenFlow switch has a finite number of tables. OpenFlow tables are most
84 * commonly traversed in numerically increasing order, so this limit has little
85 * effect on conventionally designed OpenFlow pipelines.
87 * Outputs to patch ports and to groups also count against the depth limit. */
90 /* Maximum number of resubmit actions in a flow translation, whether they are
91 * recursive or not. */
92 #define MAX_RESUBMITS (MAX_DEPTH * MAX_DEPTH)
94 /* The structure holds an array of IP addresses assigned to a bridge and the
95 * number of elements in the array. These data are mutable and are evaluated
96 * when ARP or Neighbor Advertisement packets received on a native tunnel
97 * port are xlated. So 'ref_cnt' and RCU are used for synchronization. */
99 struct in6_addr
*addr
; /* Array of IP addresses of xbridge. */
100 int n_addr
; /* Number of IP addresses. */
101 struct ovs_refcount ref_cnt
;
105 struct hmap_node hmap_node
; /* Node in global 'xbridges' map. */
106 struct ofproto_dpif
*ofproto
; /* Key in global 'xbridges' map. */
108 struct ovs_list xbundles
; /* Owned xbundles. */
109 struct hmap xports
; /* Indexed by ofp_port. */
111 char *name
; /* Name used in log messages. */
112 struct dpif
*dpif
; /* Datapath interface. */
113 struct mac_learning
*ml
; /* Mac learning handle. */
114 struct mcast_snooping
*ms
; /* Multicast Snooping handle. */
115 struct mbridge
*mbridge
; /* Mirroring. */
116 struct dpif_sflow
*sflow
; /* SFlow handle, or null. */
117 struct dpif_ipfix
*ipfix
; /* Ipfix handle, or null. */
118 struct netflow
*netflow
; /* Netflow handle, or null. */
119 struct stp
*stp
; /* STP or null if disabled. */
120 struct rstp
*rstp
; /* RSTP or null if disabled. */
122 bool has_in_band
; /* Bridge has in band control? */
123 bool forward_bpdu
; /* Bridge forwards STP BPDUs? */
125 /* Datapath feature support. */
126 struct dpif_backer_support support
;
128 struct xbridge_addr
*addr
;
132 struct hmap_node hmap_node
; /* In global 'xbundles' map. */
133 struct ofbundle
*ofbundle
; /* Key in global 'xbundles' map. */
135 struct ovs_list list_node
; /* In parent 'xbridges' list. */
136 struct xbridge
*xbridge
; /* Parent xbridge. */
138 struct ovs_list xports
; /* Contains "struct xport"s. */
140 char *name
; /* Name used in log messages. */
141 struct bond
*bond
; /* Nonnull iff more than one port. */
142 struct lacp
*lacp
; /* LACP handle or null. */
144 enum port_vlan_mode vlan_mode
; /* VLAN mode. */
145 uint16_t qinq_ethtype
; /* Ethertype of dot1q-tunnel interface
146 * either 0x8100 or 0x88a8. */
147 int vlan
; /* -1=trunk port, else a 12-bit VLAN ID. */
148 unsigned long *trunks
; /* Bitmap of trunked VLANs, if 'vlan' == -1.
149 * NULL if all VLANs are trunked. */
150 unsigned long *cvlans
; /* Bitmap of allowed customer vlans,
151 * NULL if all VLANs are allowed */
152 enum port_priority_tags_mode use_priority_tags
;
153 /* Use 802.1p tag for frames in VLAN 0? */
154 bool floodable
; /* No port has OFPUTIL_PC_NO_FLOOD set? */
155 bool protected; /* Protected port mode */
159 struct hmap_node hmap_node
; /* Node in global 'xports' map. */
160 struct ofport_dpif
*ofport
; /* Key in global 'xports map. */
162 struct hmap_node ofp_node
; /* Node in parent xbridge 'xports' map. */
163 ofp_port_t ofp_port
; /* Key in parent xbridge 'xports' map. */
165 struct hmap_node uuid_node
; /* Node in global 'xports_uuid' map. */
166 struct uuid uuid
; /* Key in global 'xports_uuid' map. */
168 odp_port_t odp_port
; /* Datapath port number or ODPP_NONE. */
170 struct ovs_list bundle_node
; /* In parent xbundle (if it exists). */
171 struct xbundle
*xbundle
; /* Parent xbundle or null. */
173 struct netdev
*netdev
; /* 'ofport''s netdev. */
175 struct xbridge
*xbridge
; /* Parent bridge. */
176 struct xport
*peer
; /* Patch port peer or null. */
178 enum ofputil_port_config config
; /* OpenFlow port configuration. */
179 enum ofputil_port_state state
; /* OpenFlow port state. */
180 int stp_port_no
; /* STP port number or -1 if not in use. */
181 struct rstp_port
*rstp_port
; /* RSTP port or null. */
183 struct hmap skb_priorities
; /* Map of 'skb_priority_to_dscp's. */
185 bool may_enable
; /* May be enabled in bonds. */
186 bool is_tunnel
; /* Is a tunnel port. */
187 enum netdev_pt_mode pt_mode
; /* packet_type handling. */
189 struct cfm
*cfm
; /* CFM handle or null. */
190 struct bfd
*bfd
; /* BFD handle or null. */
191 struct lldp
*lldp
; /* LLDP handle or null. */
195 struct xlate_in
*xin
;
196 struct xlate_out
*xout
;
198 struct xlate_cfg
*xcfg
;
199 const struct xbridge
*xbridge
;
201 /* Flow at the last commit. */
202 struct flow base_flow
;
204 /* Tunnel IP destination address as received. This is stored separately
205 * as the base_flow.tunnel is cleared on init to reflect the datapath
206 * behavior. Used to make sure not to send tunneled output to ourselves,
207 * which might lead to an infinite loop. This could happen easily
208 * if a tunnel is marked as 'ip_remote=flow', and the flow does not
209 * actually set the tun_dst field. */
210 struct in6_addr orig_tunnel_ipv6_dst
;
212 /* Stack for the push and pop actions. See comment above nx_stack_push()
213 * in nx-match.c for info on how the stack is stored. */
216 /* The rule that we are currently translating, or NULL. */
217 struct rule_dpif
*rule
;
219 /* Flow translation populates this with wildcards relevant in translation.
220 * When 'xin->wc' is nonnull, this is the same pointer. When 'xin->wc' is
221 * null, this is a pointer to a temporary buffer. */
222 struct flow_wildcards
*wc
;
224 /* Output buffer for datapath actions. When 'xin->odp_actions' is nonnull,
225 * this is the same pointer. When 'xin->odp_actions' is null, this points
226 * to a scratch ofpbuf. This allows code to add actions to
227 * 'ctx->odp_actions' without worrying about whether the caller really
229 struct ofpbuf
*odp_actions
;
231 /* Statistics maintained by xlate_table_action().
233 * These statistics limit the amount of work that a single flow
234 * translation can perform. The goal of the first of these, 'depth', is
235 * primarily to prevent translation from performing an infinite amount of
236 * work. It counts the current depth of nested "resubmit"s (and a few
237 * other activities); when a resubmit returns, it decreases. Resubmits to
238 * tables in strictly monotonically increasing order don't contribute to
239 * 'depth' because they cannot cause a flow translation to take an infinite
240 * amount of time (because the number of tables is finite). Translation
241 * aborts when 'depth' exceeds MAX_DEPTH.
243 * 'resubmits', on the other hand, prevents flow translation from
244 * performing an extraordinarily large while still finite amount of work.
245 * It counts the total number of resubmits (and a few other activities)
246 * that have been executed. Returning from a resubmit does not affect this
247 * counter. Thus, this limits the amount of work that a particular
248 * translation can perform. Translation aborts when 'resubmits' exceeds
249 * MAX_RESUBMITS (which is much larger than MAX_DEPTH).
251 int depth
; /* Current resubmit nesting depth. */
252 int resubmits
; /* Total number of resubmits. */
253 bool in_action_set
; /* Currently translating action_set, if true. */
254 bool in_packet_out
; /* Currently translating a packet_out msg, if
256 bool pending_encap
; /* True when waiting to commit a pending
258 bool pending_decap
; /* True when waiting to commit a pending
260 struct ofpbuf
*encap_data
; /* May contain a pointer to an ofpbuf with
261 * context for the datapath encap action.*/
263 uint8_t table_id
; /* OpenFlow table ID where flow was found. */
264 ovs_be64 rule_cookie
; /* Cookie of the rule being translated. */
265 uint32_t orig_skb_priority
; /* Priority when packet arrived. */
266 uint32_t sflow_n_outputs
; /* Number of output ports. */
267 odp_port_t sflow_odp_port
; /* Output port for composing sFlow action. */
268 ofp_port_t nf_output_iface
; /* Output interface index for NetFlow. */
269 bool exit
; /* No further actions should be processed. */
270 mirror_mask_t mirrors
; /* Bitmap of associated mirrors. */
271 int mirror_snaplen
; /* Max size of a mirror packet in byte. */
273 /* Freezing Translation
274 * ====================
276 * At some point during translation, the code may recognize the need to halt
277 * and checkpoint the translation in a way that it can be restarted again
278 * later. We call the checkpointing process "freezing" and the restarting
281 * The use cases for freezing are:
283 * - "Recirculation", where the translation process discovers that it
284 * doesn't have enough information to complete translation without
285 * actually executing the actions that have already been translated,
286 * which provides the additionally needed information. In these
287 * situations, translation freezes translation and assigns the frozen
288 * data a unique "recirculation ID", which it associates with the data
289 * in a table in userspace (see ofproto-dpif-rid.h). It also adds a
290 * OVS_ACTION_ATTR_RECIRC action specifying that ID to the datapath
291 * actions. When a packet hits that action, the datapath looks its
292 * flow up again using the ID. If there's a miss, it comes back to
293 * userspace, which find the recirculation table entry for the ID,
294 * thaws the associated frozen data, and continues translation from
295 * that point given the additional information that is now known.
297 * The archetypal example is MPLS. As MPLS is implemented in
298 * OpenFlow, the protocol that follows the last MPLS label becomes
299 * known only when that label is popped by an OpenFlow action. That
300 * means that Open vSwitch can't extract the headers beyond the MPLS
301 * labels until the pop action is executed. Thus, at that point
302 * translation uses the recirculation process to extract the headers
303 * beyond the MPLS labels.
305 * (OVS also uses OVS_ACTION_ATTR_RECIRC to implement hashing for
306 * output to bonds. OVS pre-populates all the datapath flows for bond
307 * output in the datapath, though, which means that the elaborate
308 * process of coming back to userspace for a second round of
309 * translation isn't needed, and so bonds don't follow the above
312 * - "Continuation". A continuation is a way for an OpenFlow controller
313 * to interpose on a packet's traversal of the OpenFlow tables. When
314 * the translation process encounters a "controller" action with the
315 * "pause" flag, it freezes translation, serializes the frozen data,
316 * and sends it to an OpenFlow controller. The controller then
317 * examines and possibly modifies the frozen data and eventually sends
318 * it back to the switch, which thaws it and continues translation.
320 * The main problem of freezing translation is preserving state, so that
321 * when the translation is thawed later it resumes from where it left off,
322 * without disruption. In particular, actions must be preserved as follows:
324 * - If we're freezing because an action needed more information, the
325 * action that prompted it.
327 * - Any actions remaining to be translated within the current flow.
329 * - If translation was frozen within a NXAST_RESUBMIT, then any actions
330 * following the resubmit action. Resubmit actions can be nested, so
331 * this has to go all the way up the control stack.
333 * - The OpenFlow 1.1+ action set.
335 * State that actions and flow table lookups can depend on, such as the
336 * following, must also be preserved:
338 * - Metadata fields (input port, registers, OF1.1+ metadata, ...).
340 * - The stack used by NXAST_STACK_PUSH and NXAST_STACK_POP actions.
342 * - The table ID and cookie of the flow being translated at each level
343 * of the control stack, because these can become visible through
344 * OFPAT_CONTROLLER actions (and other ways).
346 * Translation allows for the control of this state preservation via these
347 * members. When a need to freeze translation is identified, the
348 * translation process:
350 * 1. Sets 'freezing' to true.
352 * 2. Sets 'exit' to true to tell later steps that we're exiting from the
353 * translation process.
355 * 3. Adds an OFPACT_UNROLL_XLATE action to 'frozen_actions', and points
356 * frozen_actions.header to the action to make it easy to find it later.
357 * This action holds the current table ID and cookie so that they can be
358 * restored during a post-recirculation upcall translation.
360 * 4. Adds the action that prompted recirculation and any actions following
361 * it within the same flow to 'frozen_actions', so that they can be
362 * executed during a post-recirculation upcall translation.
366 * 6. The action that prompted recirculation might be nested in a stack of
367 * nested "resubmit"s that have actions remaining. Each of these notices
368 * that we're exiting and freezing and responds by adding more
369 * OFPACT_UNROLL_XLATE actions to 'frozen_actions', as necessary,
370 * followed by any actions that were yet unprocessed.
372 * If we're freezing because of recirculation, the caller generates a
373 * recirculation ID and associates all the state produced by this process
374 * with it. For post-recirculation upcall translation, the caller passes it
375 * back in for the new translation to execute. The process yielded a set of
376 * ofpacts that can be translated directly, so it is not much of a special
377 * case at that point.
380 bool recirc_update_dp_hash
; /* Generated recirculation will be preceded
381 * by datapath HASH action to get an updated
382 * dp_hash after recirculation. */
383 uint32_t dp_hash_alg
;
384 uint32_t dp_hash_basis
;
385 struct ofpbuf frozen_actions
;
386 const struct ofpact_controller
*pause
;
388 /* True if a packet was but is no longer MPLS (due to an MPLS pop action).
389 * This is a trigger for recirculation in cases where translating an action
390 * or looking up a flow requires access to the fields of the packet after
391 * the MPLS label stack that was originally present. */
394 /* True if conntrack has been performed on this packet during processing
395 * on the current bridge. This is used to determine whether conntrack
396 * state from the datapath should be honored after thawing. */
399 /* Pointer to an embedded NAT action in a conntrack action, or NULL. */
400 struct ofpact_nat
*ct_nat_action
;
402 /* OpenFlow 1.1+ action set.
404 * 'action_set' accumulates "struct ofpact"s added by OFPACT_WRITE_ACTIONS.
405 * When translation is otherwise complete, ofpacts_execute_action_set()
406 * converts it to a set of "struct ofpact"s that can be translated into
407 * datapath actions. */
408 bool action_set_has_group
; /* Action set contains OFPACT_GROUP? */
409 struct ofpbuf action_set
; /* Action set. */
411 enum xlate_error error
; /* Translation failed. */
414 /* Structure to track VLAN manipulation */
415 struct xvlan_single
{
422 struct xvlan_single v
[FLOW_MAX_VLAN_HEADERS
];
425 const char *xlate_strerror(enum xlate_error error
)
430 case XLATE_BRIDGE_NOT_FOUND
:
431 return "Bridge not found";
432 case XLATE_RECURSION_TOO_DEEP
:
433 return "Recursion too deep";
434 case XLATE_TOO_MANY_RESUBMITS
:
435 return "Too many resubmits";
436 case XLATE_STACK_TOO_DEEP
:
437 return "Stack too deep";
438 case XLATE_NO_RECIRCULATION_CONTEXT
:
439 return "No recirculation context";
440 case XLATE_RECIRCULATION_CONFLICT
:
441 return "Recirculation conflict";
442 case XLATE_TOO_MANY_MPLS_LABELS
:
443 return "Too many MPLS labels";
444 case XLATE_INVALID_TUNNEL_METADATA
:
445 return "Invalid tunnel metadata";
446 case XLATE_UNSUPPORTED_PACKET_TYPE
:
447 return "Unsupported packet type";
448 case XLATE_CONGESTION_DROP
:
449 return "Congestion Drop";
450 case XLATE_FORWARDING_DISABLED
:
451 return "Forwarding is disabled";
455 return "Unknown error";
458 static void xlate_action_set(struct xlate_ctx
*ctx
);
459 static void xlate_commit_actions(struct xlate_ctx
*ctx
);
462 patch_port_output(struct xlate_ctx
*ctx
, const struct xport
*in_dev
,
463 struct xport
*out_dev
);
466 ctx_trigger_freeze(struct xlate_ctx
*ctx
)
469 ctx
->freezing
= true;
473 ctx_trigger_recirculate_with_hash(struct xlate_ctx
*ctx
, uint32_t type
,
477 ctx
->freezing
= true;
478 ctx
->recirc_update_dp_hash
= true;
479 ctx
->dp_hash_alg
= type
;
480 ctx
->dp_hash_basis
= basis
;
484 ctx_first_frozen_action(const struct xlate_ctx
*ctx
)
486 return !ctx
->frozen_actions
.size
;
490 ctx_cancel_freeze(struct xlate_ctx
*ctx
)
493 ctx
->freezing
= false;
494 ctx
->recirc_update_dp_hash
= false;
495 ofpbuf_clear(&ctx
->frozen_actions
);
496 ctx
->frozen_actions
.header
= NULL
;
501 static void finish_freezing(struct xlate_ctx
*ctx
);
503 /* A controller may use OFPP_NONE as the ingress port to indicate that
504 * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for
505 * when an input bundle is needed for validation (e.g., mirroring or
506 * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have
507 * any 'port' structs, so care must be taken when dealing with it. */
508 static struct xbundle ofpp_none_bundle
= {
510 .vlan_mode
= PORT_VLAN_TRUNK
513 /* Node in 'xport''s 'skb_priorities' map. Used to maintain a map from
514 * 'priority' (the datapath's term for QoS queue) to the dscp bits which all
515 * traffic egressing the 'ofport' with that priority should be marked with. */
516 struct skb_priority_to_dscp
{
517 struct hmap_node hmap_node
; /* Node in 'ofport_dpif''s 'skb_priorities'. */
518 uint32_t skb_priority
; /* Priority of this queue (see struct flow). */
520 uint8_t dscp
; /* DSCP bits to mark outgoing traffic with. */
523 /* Xlate config contains hash maps of all bridges, bundles and ports.
524 * Xcfgp contains the pointer to the current xlate configuration.
525 * When the main thread needs to change the configuration, it copies xcfgp to
526 * new_xcfg and edits new_xcfg. This enables the use of RCU locking which
527 * does not block handler and revalidator threads. */
529 struct hmap xbridges
;
530 struct hmap xbundles
;
532 struct hmap xports_uuid
;
534 static OVSRCU_TYPE(struct xlate_cfg
*) xcfgp
= OVSRCU_INITIALIZER(NULL
);
535 static struct xlate_cfg
*new_xcfg
= NULL
;
537 typedef void xlate_actions_handler(const struct ofpact
*, size_t ofpacts_len
,
538 struct xlate_ctx
*, bool, bool);
539 static bool may_receive(const struct xport
*, struct xlate_ctx
*);
540 static void do_xlate_actions(const struct ofpact
*, size_t ofpacts_len
,
541 struct xlate_ctx
*, bool, bool);
542 static void clone_xlate_actions(const struct ofpact
*, size_t ofpacts_len
,
543 struct xlate_ctx
*, bool, bool);
544 static void xlate_normal(struct xlate_ctx
*);
545 static void xlate_normal_flood(struct xlate_ctx
*ct
,
546 struct xbundle
*in_xbundle
, struct xvlan
*);
547 static void xlate_table_action(struct xlate_ctx
*, ofp_port_t in_port
,
548 uint8_t table_id
, bool may_packet_in
,
549 bool honor_table_miss
, bool with_ct_orig
,
550 bool is_last_action
, xlate_actions_handler
*);
552 static bool input_vid_is_valid(const struct xlate_ctx
*,
553 uint16_t vid
, struct xbundle
*);
554 static void xvlan_copy(struct xvlan
*dst
, const struct xvlan
*src
);
555 static void xvlan_pop(struct xvlan
*src
);
556 static void xvlan_push_uninit(struct xvlan
*src
);
557 static void xvlan_extract(const struct flow
*, struct xvlan
*);
558 static void xvlan_put(struct flow
*, const struct xvlan
*,
559 enum port_priority_tags_mode
);
560 static void xvlan_input_translate(const struct xbundle
*,
561 const struct xvlan
*in
,
562 struct xvlan
*xvlan
);
563 static void xvlan_output_translate(const struct xbundle
*,
564 const struct xvlan
*xvlan
,
566 static void output_normal(struct xlate_ctx
*, const struct xbundle
*,
567 const struct xvlan
*);
569 /* Optional bond recirculation parameter to compose_output_action(). */
570 struct xlate_bond_recirc
{
571 uint32_t recirc_id
; /* !0 Use recirculation instead of output. */
572 uint8_t hash_alg
; /* !0 Compute hash for recirc before. */
573 uint32_t hash_basis
; /* Compute hash for recirc before. */
576 static void compose_output_action(struct xlate_ctx
*, ofp_port_t ofp_port
,
577 const struct xlate_bond_recirc
*xr
,
578 bool is_last_action
, bool truncate
);
580 static struct xbridge
*xbridge_lookup(struct xlate_cfg
*,
581 const struct ofproto_dpif
*);
582 static struct xbridge
*xbridge_lookup_by_uuid(struct xlate_cfg
*,
583 const struct uuid
*);
584 static struct xbundle
*xbundle_lookup(struct xlate_cfg
*,
585 const struct ofbundle
*);
586 static struct xport
*xport_lookup(struct xlate_cfg
*,
587 const struct ofport_dpif
*);
588 static struct xport
*xport_lookup_by_uuid(struct xlate_cfg
*,
589 const struct uuid
*);
590 static struct xport
*get_ofp_port(const struct xbridge
*, ofp_port_t ofp_port
);
591 static struct skb_priority_to_dscp
*get_skb_priority(const struct xport
*,
592 uint32_t skb_priority
);
593 static void clear_skb_priorities(struct xport
*);
594 static size_t count_skb_priorities(const struct xport
*);
595 static bool dscp_from_skb_priority(const struct xport
*, uint32_t skb_priority
,
598 static void xlate_xbridge_init(struct xlate_cfg
*, struct xbridge
*);
599 static void xlate_xbundle_init(struct xlate_cfg
*, struct xbundle
*);
600 static void xlate_xport_init(struct xlate_cfg
*, struct xport
*);
601 static void xlate_xbridge_set(struct xbridge
*, struct dpif
*,
602 const struct mac_learning
*, struct stp
*,
603 struct rstp
*, const struct mcast_snooping
*,
604 const struct mbridge
*,
605 const struct dpif_sflow
*,
606 const struct dpif_ipfix
*,
607 const struct netflow
*,
608 bool forward_bpdu
, bool has_in_band
,
609 const struct dpif_backer_support
*,
610 const struct xbridge_addr
*);
611 static void xlate_xbundle_set(struct xbundle
*xbundle
,
612 enum port_vlan_mode vlan_mode
,
613 uint16_t qinq_ethtype
, int vlan
,
614 unsigned long *trunks
, unsigned long *cvlans
,
615 enum port_priority_tags_mode
,
616 const struct bond
*bond
, const struct lacp
*lacp
,
617 bool floodable
, bool protected);
618 static void xlate_xport_set(struct xport
*xport
, odp_port_t odp_port
,
619 const struct netdev
*netdev
, const struct cfm
*cfm
,
620 const struct bfd
*bfd
, const struct lldp
*lldp
,
621 int stp_port_no
, const struct rstp_port
*rstp_port
,
622 enum ofputil_port_config config
,
623 enum ofputil_port_state state
, bool is_tunnel
,
625 static void xlate_xbridge_remove(struct xlate_cfg
*, struct xbridge
*);
626 static void xlate_xbundle_remove(struct xlate_cfg
*, struct xbundle
*);
627 static void xlate_xport_remove(struct xlate_cfg
*, struct xport
*);
628 static void xlate_xbridge_copy(struct xbridge
*);
629 static void xlate_xbundle_copy(struct xbridge
*, struct xbundle
*);
630 static void xlate_xport_copy(struct xbridge
*, struct xbundle
*,
632 static void xlate_xcfg_free(struct xlate_cfg
*);
634 /* Tracing helpers. */
636 /* If tracing is enabled in 'ctx', creates a new trace node and appends it to
637 * the list of nodes maintained in ctx->xin. The new node has type 'type' and
638 * its text is created from 'format' by treating it as a printf format string.
639 * Returns the list of nodes embedded within the new trace node; ordinarily,
640 * the calleer can ignore this, but it is useful if the caller needs to nest
641 * more trace nodes within the new node.
643 * If tracing is not enabled, does nothing and returns NULL. */
644 static struct ovs_list
* OVS_PRINTF_FORMAT(3, 4)
645 xlate_report(const struct xlate_ctx
*ctx
, enum oftrace_node_type type
,
646 const char *format
, ...)
648 struct ovs_list
*subtrace
= NULL
;
649 if (OVS_UNLIKELY(ctx
->xin
->trace
)) {
651 va_start(args
, format
);
652 char *text
= xvasprintf(format
, args
);
653 subtrace
= &oftrace_report(ctx
->xin
->trace
, type
, text
)->subs
;
660 /* This is like xlate_report() for errors that are serious enough that we
661 * should log them even if we are not tracing. */
662 static void OVS_PRINTF_FORMAT(2, 3)
663 xlate_report_error(const struct xlate_ctx
*ctx
, const char *format
, ...)
665 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
666 if (!OVS_UNLIKELY(ctx
->xin
->trace
)
667 && (!ctx
->xin
->packet
|| VLOG_DROP_WARN(&rl
))) {
671 struct ds s
= DS_EMPTY_INITIALIZER
;
673 va_start(args
, format
);
674 ds_put_format_valist(&s
, format
, args
);
677 if (ctx
->xin
->trace
) {
678 oftrace_report(ctx
->xin
->trace
, OFT_ERROR
, ds_cstr(&s
));
680 ds_put_format(&s
, " on bridge %s while processing ",
682 flow_format(&s
, &ctx
->base_flow
, NULL
);
683 VLOG_WARN("%s", ds_cstr(&s
));
688 /* This is like xlate_report() for messages that should be logged
689 at the info level (even when not tracing). */
690 static void OVS_PRINTF_FORMAT(2, 3)
691 xlate_report_info(const struct xlate_ctx
*ctx
, const char *format
, ...)
693 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
694 if (!OVS_UNLIKELY(ctx
->xin
->trace
)
695 && (!ctx
->xin
->packet
|| VLOG_DROP_INFO(&rl
))) {
699 struct ds s
= DS_EMPTY_INITIALIZER
;
701 va_start(args
, format
);
702 ds_put_format_valist(&s
, format
, args
);
705 if (ctx
->xin
->trace
) {
706 oftrace_report(ctx
->xin
->trace
, OFT_WARN
, ds_cstr(&s
));
708 ds_put_format(&s
, " on bridge %s while processing ",
710 flow_format(&s
, &ctx
->base_flow
, NULL
);
711 VLOG_INFO("%s", ds_cstr(&s
));
716 /* This is like xlate_report() for messages that should be logged at debug
717 * level (even if we are not tracing) because they can be valuable for
719 static void OVS_PRINTF_FORMAT(3, 4)
720 xlate_report_debug(const struct xlate_ctx
*ctx
, enum oftrace_node_type type
,
721 const char *format
, ...)
723 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(30, 300);
724 if (!OVS_UNLIKELY(ctx
->xin
->trace
)
725 && (!ctx
->xin
->packet
|| VLOG_DROP_DBG(&rl
))) {
729 struct ds s
= DS_EMPTY_INITIALIZER
;
731 va_start(args
, format
);
732 ds_put_format_valist(&s
, format
, args
);
735 if (ctx
->xin
->trace
) {
736 oftrace_report(ctx
->xin
->trace
, type
, ds_cstr(&s
));
738 VLOG_DBG("bridge %s: %s", ctx
->xbridge
->name
, ds_cstr(&s
));
743 /* If tracing is enabled in 'ctx', appends a node of the given 'type' to the
744 * trace, whose text is 'title' followed by a formatted version of the
745 * 'ofpacts_len' OpenFlow actions in 'ofpacts'.
747 * If tracing is not enabled, does nothing. */
749 xlate_report_actions(const struct xlate_ctx
*ctx
, enum oftrace_node_type type
,
751 const struct ofpact
*ofpacts
, size_t ofpacts_len
)
753 if (OVS_UNLIKELY(ctx
->xin
->trace
)) {
754 struct ds s
= DS_EMPTY_INITIALIZER
;
755 ds_put_format(&s
, "%s: ", title
);
756 struct ofpact_format_params fp
= { .s
= &s
};
757 ofpacts_format(ofpacts
, ofpacts_len
, &fp
);
758 oftrace_report(ctx
->xin
->trace
, type
, ds_cstr(&s
));
763 /* If tracing is enabled in 'ctx', appends a node of type OFT_DETAIL to the
764 * trace, whose the message is a formatted version of the OpenFlow action set.
765 * 'verb' should be "was" or "is", depending on whether the action set reported
766 * is the new action set or the old one.
768 * If tracing is not enabled, does nothing. */
770 xlate_report_action_set(const struct xlate_ctx
*ctx
, const char *verb
)
772 if (OVS_UNLIKELY(ctx
->xin
->trace
)) {
773 struct ofpbuf action_list
;
774 ofpbuf_init(&action_list
, 0);
775 ofpacts_execute_action_set(&action_list
, &ctx
->action_set
);
776 if (action_list
.size
) {
777 struct ds s
= DS_EMPTY_INITIALIZER
;
778 struct ofpact_format_params fp
= { .s
= &s
};
779 ofpacts_format(action_list
.data
, action_list
.size
, &fp
);
780 xlate_report(ctx
, OFT_DETAIL
, "action set %s: %s",
784 xlate_report(ctx
, OFT_DETAIL
, "action set %s empty", verb
);
786 ofpbuf_uninit(&action_list
);
791 /* If tracing is enabled in 'ctx', appends a node representing 'rule' (in
792 * OpenFlow table 'table_id') to the trace and makes this node the parent for
793 * future trace nodes. The caller should save ctx->xin->trace before calling
794 * this function, then after tracing all of the activities under the table,
795 * restore its previous value.
797 * If tracing is not enabled, does nothing. */
799 xlate_report_table(const struct xlate_ctx
*ctx
, struct rule_dpif
*rule
,
802 if (OVS_LIKELY(!ctx
->xin
->trace
)) {
806 struct ds s
= DS_EMPTY_INITIALIZER
;
807 ds_put_format(&s
, "%2d. ", table_id
);
808 if (rule
== ctx
->xin
->ofproto
->miss_rule
) {
809 ds_put_cstr(&s
, "No match, and a \"packet-in\" is called for.");
810 } else if (rule
== ctx
->xin
->ofproto
->no_packet_in_rule
) {
811 ds_put_cstr(&s
, "No match.");
812 } else if (rule
== ctx
->xin
->ofproto
->drop_frags_rule
) {
813 ds_put_cstr(&s
, "Packets are IP fragments and "
814 "the fragment handling mode is \"drop\".");
816 minimatch_format(&rule
->up
.cr
.match
,
817 ofproto_get_tun_tab(&ctx
->xin
->ofproto
->up
),
818 NULL
, &s
, OFP_DEFAULT_PRIORITY
);
819 if (ds_last(&s
) != ' ') {
820 ds_put_cstr(&s
, ", ");
822 ds_put_format(&s
, "priority %d", rule
->up
.cr
.priority
);
823 if (rule
->up
.flow_cookie
) {
824 ds_put_format(&s
, ", cookie %#"PRIx64
,
825 ntohll(rule
->up
.flow_cookie
));
828 ctx
->xin
->trace
= &oftrace_report(ctx
->xin
->trace
, OFT_TABLE
,
833 /* If tracing is enabled in 'ctx', adds an OFT_DETAIL trace node to 'ctx'
834 * reporting the value of subfield 'sf'.
836 * If tracing is not enabled, does nothing. */
838 xlate_report_subfield(const struct xlate_ctx
*ctx
,
839 const struct mf_subfield
*sf
)
841 if (OVS_UNLIKELY(ctx
->xin
->trace
)) {
842 struct ds s
= DS_EMPTY_INITIALIZER
;
843 mf_format_subfield(sf
, &s
);
844 ds_put_cstr(&s
, " is now ");
846 if (sf
->ofs
== 0 && sf
->n_bits
>= sf
->field
->n_bits
) {
847 union mf_value value
;
848 mf_get_value(sf
->field
, &ctx
->xin
->flow
, &value
);
849 mf_format(sf
->field
, &value
, NULL
, NULL
, &s
);
851 union mf_subvalue cst
;
852 mf_read_subfield(sf
, &ctx
->xin
->flow
, &cst
);
853 ds_put_hex(&s
, &cst
, sizeof cst
);
856 xlate_report(ctx
, OFT_DETAIL
, "%s", ds_cstr(&s
));
863 xlate_xbridge_init(struct xlate_cfg
*xcfg
, struct xbridge
*xbridge
)
865 ovs_list_init(&xbridge
->xbundles
);
866 hmap_init(&xbridge
->xports
);
867 hmap_insert(&xcfg
->xbridges
, &xbridge
->hmap_node
,
868 hash_pointer(xbridge
->ofproto
, 0));
872 xlate_xbundle_init(struct xlate_cfg
*xcfg
, struct xbundle
*xbundle
)
874 ovs_list_init(&xbundle
->xports
);
875 ovs_list_insert(&xbundle
->xbridge
->xbundles
, &xbundle
->list_node
);
876 hmap_insert(&xcfg
->xbundles
, &xbundle
->hmap_node
,
877 hash_pointer(xbundle
->ofbundle
, 0));
881 xlate_xport_init(struct xlate_cfg
*xcfg
, struct xport
*xport
)
883 hmap_init(&xport
->skb_priorities
);
884 hmap_insert(&xcfg
->xports
, &xport
->hmap_node
,
885 hash_pointer(xport
->ofport
, 0));
886 hmap_insert(&xport
->xbridge
->xports
, &xport
->ofp_node
,
887 hash_ofp_port(xport
->ofp_port
));
888 hmap_insert(&xcfg
->xports_uuid
, &xport
->uuid_node
,
889 uuid_hash(&xport
->uuid
));
892 static struct xbridge_addr
*
893 xbridge_addr_create(struct xbridge
*xbridge
)
895 struct xbridge_addr
*xbridge_addr
= xbridge
->addr
;
896 struct in6_addr
*addr
= NULL
, *mask
= NULL
;
900 err
= netdev_open(xbridge
->name
, NULL
, &dev
);
902 err
= netdev_get_addr_list(dev
, &addr
, &mask
, &n_addr
);
904 if (!xbridge
->addr
||
905 n_addr
!= xbridge
->addr
->n_addr
||
906 (xbridge
->addr
->addr
&& memcmp(addr
, xbridge
->addr
->addr
,
907 sizeof(*addr
) * n_addr
))) {
908 xbridge_addr
= xzalloc(sizeof *xbridge_addr
);
909 xbridge_addr
->addr
= addr
;
910 xbridge_addr
->n_addr
= n_addr
;
911 ovs_refcount_init(&xbridge_addr
->ref_cnt
);
923 static struct xbridge_addr
*
924 xbridge_addr_ref(const struct xbridge_addr
*addr_
)
926 struct xbridge_addr
*addr
= CONST_CAST(struct xbridge_addr
*, addr_
);
928 ovs_refcount_ref(&addr
->ref_cnt
);
934 xbridge_addr_unref(struct xbridge_addr
*addr
)
936 if (addr
&& ovs_refcount_unref_relaxed(&addr
->ref_cnt
) == 1) {
943 xlate_xbridge_set(struct xbridge
*xbridge
,
945 const struct mac_learning
*ml
, struct stp
*stp
,
946 struct rstp
*rstp
, const struct mcast_snooping
*ms
,
947 const struct mbridge
*mbridge
,
948 const struct dpif_sflow
*sflow
,
949 const struct dpif_ipfix
*ipfix
,
950 const struct netflow
*netflow
,
951 bool forward_bpdu
, bool has_in_band
,
952 const struct dpif_backer_support
*support
,
953 const struct xbridge_addr
*addr
)
955 if (xbridge
->ml
!= ml
) {
956 mac_learning_unref(xbridge
->ml
);
957 xbridge
->ml
= mac_learning_ref(ml
);
960 if (xbridge
->ms
!= ms
) {
961 mcast_snooping_unref(xbridge
->ms
);
962 xbridge
->ms
= mcast_snooping_ref(ms
);
965 if (xbridge
->mbridge
!= mbridge
) {
966 mbridge_unref(xbridge
->mbridge
);
967 xbridge
->mbridge
= mbridge_ref(mbridge
);
970 if (xbridge
->sflow
!= sflow
) {
971 dpif_sflow_unref(xbridge
->sflow
);
972 xbridge
->sflow
= dpif_sflow_ref(sflow
);
975 if (xbridge
->ipfix
!= ipfix
) {
976 dpif_ipfix_unref(xbridge
->ipfix
);
977 xbridge
->ipfix
= dpif_ipfix_ref(ipfix
);
980 if (xbridge
->stp
!= stp
) {
981 stp_unref(xbridge
->stp
);
982 xbridge
->stp
= stp_ref(stp
);
985 if (xbridge
->rstp
!= rstp
) {
986 rstp_unref(xbridge
->rstp
);
987 xbridge
->rstp
= rstp_ref(rstp
);
990 if (xbridge
->netflow
!= netflow
) {
991 netflow_unref(xbridge
->netflow
);
992 xbridge
->netflow
= netflow_ref(netflow
);
995 if (xbridge
->addr
!= addr
) {
996 xbridge_addr_unref(xbridge
->addr
);
997 xbridge
->addr
= xbridge_addr_ref(addr
);
1000 xbridge
->dpif
= dpif
;
1001 xbridge
->forward_bpdu
= forward_bpdu
;
1002 xbridge
->has_in_band
= has_in_band
;
1003 xbridge
->support
= *support
;
1007 xlate_xbundle_set(struct xbundle
*xbundle
,
1008 enum port_vlan_mode vlan_mode
, uint16_t qinq_ethtype
,
1009 int vlan
, unsigned long *trunks
, unsigned long *cvlans
,
1010 enum port_priority_tags_mode use_priority_tags
,
1011 const struct bond
*bond
, const struct lacp
*lacp
,
1012 bool floodable
, bool protected)
1014 ovs_assert(xbundle
->xbridge
);
1016 xbundle
->vlan_mode
= vlan_mode
;
1017 xbundle
->qinq_ethtype
= qinq_ethtype
;
1018 xbundle
->vlan
= vlan
;
1019 xbundle
->trunks
= trunks
;
1020 xbundle
->cvlans
= cvlans
;
1021 xbundle
->use_priority_tags
= use_priority_tags
;
1022 xbundle
->floodable
= floodable
;
1023 xbundle
->protected = protected;
1025 if (xbundle
->bond
!= bond
) {
1026 bond_unref(xbundle
->bond
);
1027 xbundle
->bond
= bond_ref(bond
);
1030 if (xbundle
->lacp
!= lacp
) {
1031 lacp_unref(xbundle
->lacp
);
1032 xbundle
->lacp
= lacp_ref(lacp
);
1037 xlate_xport_set(struct xport
*xport
, odp_port_t odp_port
,
1038 const struct netdev
*netdev
, const struct cfm
*cfm
,
1039 const struct bfd
*bfd
, const struct lldp
*lldp
, int stp_port_no
,
1040 const struct rstp_port
* rstp_port
,
1041 enum ofputil_port_config config
, enum ofputil_port_state state
,
1042 bool is_tunnel
, bool may_enable
)
1044 xport
->config
= config
;
1045 xport
->state
= state
;
1046 xport
->stp_port_no
= stp_port_no
;
1047 xport
->is_tunnel
= is_tunnel
;
1048 xport
->pt_mode
= netdev_get_pt_mode(netdev
);
1049 xport
->may_enable
= may_enable
;
1050 xport
->odp_port
= odp_port
;
1052 if (xport
->rstp_port
!= rstp_port
) {
1053 rstp_port_unref(xport
->rstp_port
);
1054 xport
->rstp_port
= rstp_port_ref(rstp_port
);
1057 if (xport
->cfm
!= cfm
) {
1058 cfm_unref(xport
->cfm
);
1059 xport
->cfm
= cfm_ref(cfm
);
1062 if (xport
->bfd
!= bfd
) {
1063 bfd_unref(xport
->bfd
);
1064 xport
->bfd
= bfd_ref(bfd
);
1067 if (xport
->lldp
!= lldp
) {
1068 lldp_unref(xport
->lldp
);
1069 xport
->lldp
= lldp_ref(lldp
);
1072 if (xport
->netdev
!= netdev
) {
1073 netdev_close(xport
->netdev
);
1074 xport
->netdev
= netdev_ref(netdev
);
1079 xlate_xbridge_copy(struct xbridge
*xbridge
)
1081 struct xbundle
*xbundle
;
1082 struct xport
*xport
;
1083 struct xbridge
*new_xbridge
= xzalloc(sizeof *xbridge
);
1084 new_xbridge
->ofproto
= xbridge
->ofproto
;
1085 new_xbridge
->name
= xstrdup(xbridge
->name
);
1086 xlate_xbridge_init(new_xcfg
, new_xbridge
);
1088 xlate_xbridge_set(new_xbridge
,
1089 xbridge
->dpif
, xbridge
->ml
, xbridge
->stp
,
1090 xbridge
->rstp
, xbridge
->ms
, xbridge
->mbridge
,
1091 xbridge
->sflow
, xbridge
->ipfix
, xbridge
->netflow
,
1092 xbridge
->forward_bpdu
, xbridge
->has_in_band
,
1093 &xbridge
->support
, xbridge
->addr
);
1094 LIST_FOR_EACH (xbundle
, list_node
, &xbridge
->xbundles
) {
1095 xlate_xbundle_copy(new_xbridge
, xbundle
);
1098 /* Copy xports which are not part of a xbundle */
1099 HMAP_FOR_EACH (xport
, ofp_node
, &xbridge
->xports
) {
1100 if (!xport
->xbundle
) {
1101 xlate_xport_copy(new_xbridge
, NULL
, xport
);
1107 xlate_xbundle_copy(struct xbridge
*xbridge
, struct xbundle
*xbundle
)
1109 struct xport
*xport
;
1110 struct xbundle
*new_xbundle
= xzalloc(sizeof *xbundle
);
1111 new_xbundle
->ofbundle
= xbundle
->ofbundle
;
1112 new_xbundle
->xbridge
= xbridge
;
1113 new_xbundle
->name
= xstrdup(xbundle
->name
);
1114 xlate_xbundle_init(new_xcfg
, new_xbundle
);
1116 xlate_xbundle_set(new_xbundle
, xbundle
->vlan_mode
, xbundle
->qinq_ethtype
,
1117 xbundle
->vlan
, xbundle
->trunks
, xbundle
->cvlans
,
1118 xbundle
->use_priority_tags
, xbundle
->bond
, xbundle
->lacp
,
1119 xbundle
->floodable
, xbundle
->protected);
1120 LIST_FOR_EACH (xport
, bundle_node
, &xbundle
->xports
) {
1121 xlate_xport_copy(xbridge
, new_xbundle
, xport
);
1126 xlate_xport_copy(struct xbridge
*xbridge
, struct xbundle
*xbundle
,
1127 struct xport
*xport
)
1129 struct skb_priority_to_dscp
*pdscp
, *new_pdscp
;
1130 struct xport
*new_xport
= xzalloc(sizeof *xport
);
1131 new_xport
->ofport
= xport
->ofport
;
1132 new_xport
->ofp_port
= xport
->ofp_port
;
1133 new_xport
->xbridge
= xbridge
;
1134 new_xport
->uuid
= xport
->uuid
;
1135 xlate_xport_init(new_xcfg
, new_xport
);
1137 xlate_xport_set(new_xport
, xport
->odp_port
, xport
->netdev
, xport
->cfm
,
1138 xport
->bfd
, xport
->lldp
, xport
->stp_port_no
,
1139 xport
->rstp_port
, xport
->config
, xport
->state
,
1140 xport
->is_tunnel
, xport
->may_enable
);
1143 struct xport
*peer
= xport_lookup(new_xcfg
, xport
->peer
->ofport
);
1145 new_xport
->peer
= peer
;
1146 new_xport
->peer
->peer
= new_xport
;
1151 new_xport
->xbundle
= xbundle
;
1152 ovs_list_insert(&new_xport
->xbundle
->xports
, &new_xport
->bundle_node
);
1155 HMAP_FOR_EACH (pdscp
, hmap_node
, &xport
->skb_priorities
) {
1156 new_pdscp
= xmalloc(sizeof *pdscp
);
1157 new_pdscp
->skb_priority
= pdscp
->skb_priority
;
1158 new_pdscp
->dscp
= pdscp
->dscp
;
1159 hmap_insert(&new_xport
->skb_priorities
, &new_pdscp
->hmap_node
,
1160 hash_int(new_pdscp
->skb_priority
, 0));
1164 /* Sets the current xlate configuration to new_xcfg and frees the old xlate
1165 * configuration in xcfgp.
1167 * This needs to be called after editing the xlate configuration.
1169 * Functions that edit the new xlate configuration are
1170 * xlate_<ofproto/bundle/ofport>_set and xlate_<ofproto/bundle/ofport>_remove.
1172 * A sample workflow:
1174 * xlate_txn_start();
1176 * edit_xlate_configuration();
1178 * xlate_txn_commit();
1180 * The ovsrcu_synchronize() call here also ensures that the upcall threads
1181 * retain no references to anything in the previous configuration.
1184 xlate_txn_commit(void)
1186 struct xlate_cfg
*xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
1188 ovsrcu_set(&xcfgp
, new_xcfg
);
1189 ovsrcu_synchronize();
1190 xlate_xcfg_free(xcfg
);
1194 /* Copies the current xlate configuration in xcfgp to new_xcfg.
1196 * This needs to be called prior to editing the xlate configuration. */
1198 xlate_txn_start(void)
1200 struct xbridge
*xbridge
;
1201 struct xlate_cfg
*xcfg
;
1203 ovs_assert(!new_xcfg
);
1205 new_xcfg
= xmalloc(sizeof *new_xcfg
);
1206 hmap_init(&new_xcfg
->xbridges
);
1207 hmap_init(&new_xcfg
->xbundles
);
1208 hmap_init(&new_xcfg
->xports
);
1209 hmap_init(&new_xcfg
->xports_uuid
);
1211 xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
1216 HMAP_FOR_EACH (xbridge
, hmap_node
, &xcfg
->xbridges
) {
1217 xlate_xbridge_copy(xbridge
);
1223 xlate_xcfg_free(struct xlate_cfg
*xcfg
)
1225 struct xbridge
*xbridge
, *next_xbridge
;
1231 HMAP_FOR_EACH_SAFE (xbridge
, next_xbridge
, hmap_node
, &xcfg
->xbridges
) {
1232 xlate_xbridge_remove(xcfg
, xbridge
);
1235 hmap_destroy(&xcfg
->xbridges
);
1236 hmap_destroy(&xcfg
->xbundles
);
1237 hmap_destroy(&xcfg
->xports
);
1238 hmap_destroy(&xcfg
->xports_uuid
);
1243 xlate_ofproto_set(struct ofproto_dpif
*ofproto
, const char *name
,
1245 const struct mac_learning
*ml
, struct stp
*stp
,
1246 struct rstp
*rstp
, const struct mcast_snooping
*ms
,
1247 const struct mbridge
*mbridge
,
1248 const struct dpif_sflow
*sflow
,
1249 const struct dpif_ipfix
*ipfix
,
1250 const struct netflow
*netflow
,
1251 bool forward_bpdu
, bool has_in_band
,
1252 const struct dpif_backer_support
*support
)
1254 struct xbridge
*xbridge
;
1255 struct xbridge_addr
*xbridge_addr
, *old_addr
;
1257 ovs_assert(new_xcfg
);
1259 xbridge
= xbridge_lookup(new_xcfg
, ofproto
);
1261 xbridge
= xzalloc(sizeof *xbridge
);
1262 xbridge
->ofproto
= ofproto
;
1264 xlate_xbridge_init(new_xcfg
, xbridge
);
1267 free(xbridge
->name
);
1268 xbridge
->name
= xstrdup(name
);
1270 xbridge_addr
= xbridge_addr_create(xbridge
);
1271 old_addr
= xbridge
->addr
;
1273 xlate_xbridge_set(xbridge
, dpif
, ml
, stp
, rstp
, ms
, mbridge
, sflow
, ipfix
,
1274 netflow
, forward_bpdu
, has_in_band
, support
,
1277 if (xbridge_addr
!= old_addr
) {
1278 xbridge_addr_unref(xbridge_addr
);
1283 xlate_xbridge_remove(struct xlate_cfg
*xcfg
, struct xbridge
*xbridge
)
1285 struct xbundle
*xbundle
, *next_xbundle
;
1286 struct xport
*xport
, *next_xport
;
1292 HMAP_FOR_EACH_SAFE (xport
, next_xport
, ofp_node
, &xbridge
->xports
) {
1293 xlate_xport_remove(xcfg
, xport
);
1296 LIST_FOR_EACH_SAFE (xbundle
, next_xbundle
, list_node
, &xbridge
->xbundles
) {
1297 xlate_xbundle_remove(xcfg
, xbundle
);
1300 hmap_remove(&xcfg
->xbridges
, &xbridge
->hmap_node
);
1301 mac_learning_unref(xbridge
->ml
);
1302 mcast_snooping_unref(xbridge
->ms
);
1303 mbridge_unref(xbridge
->mbridge
);
1304 dpif_sflow_unref(xbridge
->sflow
);
1305 dpif_ipfix_unref(xbridge
->ipfix
);
1306 netflow_unref(xbridge
->netflow
);
1307 stp_unref(xbridge
->stp
);
1308 rstp_unref(xbridge
->rstp
);
1309 xbridge_addr_unref(xbridge
->addr
);
1310 hmap_destroy(&xbridge
->xports
);
1311 free(xbridge
->name
);
1316 xlate_remove_ofproto(struct ofproto_dpif
*ofproto
)
1318 struct xbridge
*xbridge
;
1320 ovs_assert(new_xcfg
);
1322 xbridge
= xbridge_lookup(new_xcfg
, ofproto
);
1323 xlate_xbridge_remove(new_xcfg
, xbridge
);
1327 xlate_bundle_set(struct ofproto_dpif
*ofproto
, struct ofbundle
*ofbundle
,
1328 const char *name
, enum port_vlan_mode vlan_mode
,
1329 uint16_t qinq_ethtype
, int vlan
,
1330 unsigned long *trunks
, unsigned long *cvlans
,
1331 enum port_priority_tags_mode use_priority_tags
,
1332 const struct bond
*bond
, const struct lacp
*lacp
,
1333 bool floodable
, bool protected)
1335 struct xbundle
*xbundle
;
1337 ovs_assert(new_xcfg
);
1339 xbundle
= xbundle_lookup(new_xcfg
, ofbundle
);
1341 xbundle
= xzalloc(sizeof *xbundle
);
1342 xbundle
->ofbundle
= ofbundle
;
1343 xbundle
->xbridge
= xbridge_lookup(new_xcfg
, ofproto
);
1345 xlate_xbundle_init(new_xcfg
, xbundle
);
1348 free(xbundle
->name
);
1349 xbundle
->name
= xstrdup(name
);
1351 xlate_xbundle_set(xbundle
, vlan_mode
, qinq_ethtype
, vlan
, trunks
, cvlans
,
1352 use_priority_tags
, bond
, lacp
, floodable
, protected);
1356 xlate_xbundle_remove(struct xlate_cfg
*xcfg
, struct xbundle
*xbundle
)
1358 struct xport
*xport
;
1364 LIST_FOR_EACH_POP (xport
, bundle_node
, &xbundle
->xports
) {
1365 xport
->xbundle
= NULL
;
1368 hmap_remove(&xcfg
->xbundles
, &xbundle
->hmap_node
);
1369 ovs_list_remove(&xbundle
->list_node
);
1370 bond_unref(xbundle
->bond
);
1371 lacp_unref(xbundle
->lacp
);
1372 free(xbundle
->name
);
1377 xlate_bundle_remove(struct ofbundle
*ofbundle
)
1379 struct xbundle
*xbundle
;
1381 ovs_assert(new_xcfg
);
1383 xbundle
= xbundle_lookup(new_xcfg
, ofbundle
);
1384 xlate_xbundle_remove(new_xcfg
, xbundle
);
1388 xlate_ofport_set(struct ofproto_dpif
*ofproto
, struct ofbundle
*ofbundle
,
1389 struct ofport_dpif
*ofport
, ofp_port_t ofp_port
,
1390 odp_port_t odp_port
, const struct netdev
*netdev
,
1391 const struct cfm
*cfm
, const struct bfd
*bfd
,
1392 const struct lldp
*lldp
, struct ofport_dpif
*peer
,
1393 int stp_port_no
, const struct rstp_port
*rstp_port
,
1394 const struct ofproto_port_queue
*qdscp_list
, size_t n_qdscp
,
1395 enum ofputil_port_config config
,
1396 enum ofputil_port_state state
, bool is_tunnel
,
1400 struct xport
*xport
;
1402 ovs_assert(new_xcfg
);
1404 xport
= xport_lookup(new_xcfg
, ofport
);
1406 xport
= xzalloc(sizeof *xport
);
1407 xport
->ofport
= ofport
;
1408 xport
->xbridge
= xbridge_lookup(new_xcfg
, ofproto
);
1409 xport
->ofp_port
= ofp_port
;
1410 uuid_generate(&xport
->uuid
);
1412 xlate_xport_init(new_xcfg
, xport
);
1415 ovs_assert(xport
->ofp_port
== ofp_port
);
1417 xlate_xport_set(xport
, odp_port
, netdev
, cfm
, bfd
, lldp
,
1418 stp_port_no
, rstp_port
, config
, state
, is_tunnel
,
1422 xport
->peer
->peer
= NULL
;
1424 xport
->peer
= xport_lookup(new_xcfg
, peer
);
1426 xport
->peer
->peer
= xport
;
1429 if (xport
->xbundle
) {
1430 ovs_list_remove(&xport
->bundle_node
);
1432 xport
->xbundle
= xbundle_lookup(new_xcfg
, ofbundle
);
1433 if (xport
->xbundle
) {
1434 ovs_list_insert(&xport
->xbundle
->xports
, &xport
->bundle_node
);
1437 clear_skb_priorities(xport
);
1438 for (i
= 0; i
< n_qdscp
; i
++) {
1439 struct skb_priority_to_dscp
*pdscp
;
1440 uint32_t skb_priority
;
1442 if (dpif_queue_to_priority(xport
->xbridge
->dpif
, qdscp_list
[i
].queue
,
1447 pdscp
= xmalloc(sizeof *pdscp
);
1448 pdscp
->skb_priority
= skb_priority
;
1449 pdscp
->dscp
= (qdscp_list
[i
].dscp
<< 2) & IP_DSCP_MASK
;
1450 hmap_insert(&xport
->skb_priorities
, &pdscp
->hmap_node
,
1451 hash_int(pdscp
->skb_priority
, 0));
1456 xlate_xport_remove(struct xlate_cfg
*xcfg
, struct xport
*xport
)
1463 xport
->peer
->peer
= NULL
;
1467 if (xport
->xbundle
) {
1468 ovs_list_remove(&xport
->bundle_node
);
1471 clear_skb_priorities(xport
);
1472 hmap_destroy(&xport
->skb_priorities
);
1474 hmap_remove(&xcfg
->xports
, &xport
->hmap_node
);
1475 hmap_remove(&xcfg
->xports_uuid
, &xport
->uuid_node
);
1476 hmap_remove(&xport
->xbridge
->xports
, &xport
->ofp_node
);
1478 netdev_close(xport
->netdev
);
1479 rstp_port_unref(xport
->rstp_port
);
1480 cfm_unref(xport
->cfm
);
1481 bfd_unref(xport
->bfd
);
1482 lldp_unref(xport
->lldp
);
1487 xlate_ofport_remove(struct ofport_dpif
*ofport
)
1489 struct xport
*xport
;
1491 ovs_assert(new_xcfg
);
1493 xport
= xport_lookup(new_xcfg
, ofport
);
1495 tnl_neigh_flush(netdev_get_name(xport
->netdev
));
1497 xlate_xport_remove(new_xcfg
, xport
);
1500 static struct ofproto_dpif
*
1501 xlate_lookup_ofproto_(const struct dpif_backer
*backer
,
1502 const struct flow
*flow
,
1503 ofp_port_t
*ofp_in_port
, const struct xport
**xportp
,
1506 struct xlate_cfg
*xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
1507 const struct xport
*xport
;
1509 /* If packet is recirculated, xport can be retrieved from frozen state. */
1510 if (flow
->recirc_id
) {
1511 const struct recirc_id_node
*recirc_id_node
;
1513 recirc_id_node
= recirc_id_node_find(flow
->recirc_id
);
1515 if (OVS_UNLIKELY(!recirc_id_node
)) {
1517 *errorp
= xasprintf("no recirculation data for recirc_id "
1518 "%"PRIu32
, flow
->recirc_id
);
1523 ofp_port_t in_port
= recirc_id_node
->state
.metadata
.in_port
;
1524 if (in_port
!= OFPP_NONE
&& in_port
!= OFPP_CONTROLLER
) {
1525 struct uuid xport_uuid
= recirc_id_node
->state
.xport_uuid
;
1526 xport
= xport_lookup_by_uuid(xcfg
, &xport_uuid
);
1527 if (xport
&& xport
->xbridge
&& xport
->xbridge
->ofproto
) {
1531 /* OFPP_NONE and OFPP_CONTROLLER are not real ports. They indicate
1532 * that the packet originated from the controller via an OpenFlow
1533 * "packet-out". The right thing to do is to find just the
1534 * ofproto. There is no xport, which is OK.
1536 * OFPP_NONE can also indicate that a bond caused recirculation. */
1537 struct uuid uuid
= recirc_id_node
->state
.ofproto_uuid
;
1538 const struct xbridge
*bridge
= xbridge_lookup_by_uuid(xcfg
, &uuid
);
1539 if (bridge
&& bridge
->ofproto
) {
1545 *ofp_in_port
= in_port
;
1547 return bridge
->ofproto
;
1552 xport
= xport_lookup(xcfg
, tnl_port_should_receive(flow
)
1553 ? tnl_port_receive(flow
)
1554 : odp_port_to_ofport(backer
, flow
->in_port
.odp_port
));
1555 if (OVS_UNLIKELY(!xport
)) {
1557 *errorp
= (tnl_port_should_receive(flow
)
1558 ? xstrdup("no OpenFlow tunnel port for this packet")
1559 : xasprintf("no OpenFlow tunnel port for datapath "
1560 "port %"PRIu32
, flow
->in_port
.odp_port
));
1571 *ofp_in_port
= xport
->ofp_port
;
1573 return xport
->xbridge
->ofproto
;
1576 /* Given a datapath and flow metadata ('backer', and 'flow' respectively)
1577 * returns the corresponding struct ofproto_dpif and OpenFlow port number. */
1578 struct ofproto_dpif
*
1579 xlate_lookup_ofproto(const struct dpif_backer
*backer
, const struct flow
*flow
,
1580 ofp_port_t
*ofp_in_port
, char **errorp
)
1582 const struct xport
*xport
;
1584 return xlate_lookup_ofproto_(backer
, flow
, ofp_in_port
, &xport
, errorp
);
1587 /* Given a datapath and flow metadata ('backer', and 'flow' respectively),
1588 * optionally populates 'ofprotop' with the ofproto_dpif, 'ofp_in_port' with the
1589 * openflow in_port, and 'ipfix', 'sflow', and 'netflow' with the appropriate
1590 * handles for those protocols if they're enabled. Caller may use the returned
1591 * pointers until quiescing, for longer term use additional references must
1594 * Returns 0 if successful, ENODEV if the parsed flow has no associated ofproto.
1597 xlate_lookup(const struct dpif_backer
*backer
, const struct flow
*flow
,
1598 struct ofproto_dpif
**ofprotop
, struct dpif_ipfix
**ipfix
,
1599 struct dpif_sflow
**sflow
, struct netflow
**netflow
,
1600 ofp_port_t
*ofp_in_port
)
1602 struct ofproto_dpif
*ofproto
;
1603 const struct xport
*xport
;
1605 ofproto
= xlate_lookup_ofproto_(backer
, flow
, ofp_in_port
, &xport
, NULL
);
1612 *ofprotop
= ofproto
;
1616 *ipfix
= xport
? xport
->xbridge
->ipfix
: NULL
;
1620 *sflow
= xport
? xport
->xbridge
->sflow
: NULL
;
1624 *netflow
= xport
? xport
->xbridge
->netflow
: NULL
;
1630 static struct xbridge
*
1631 xbridge_lookup(struct xlate_cfg
*xcfg
, const struct ofproto_dpif
*ofproto
)
1633 struct hmap
*xbridges
;
1634 struct xbridge
*xbridge
;
1636 if (!ofproto
|| !xcfg
) {
1640 xbridges
= &xcfg
->xbridges
;
1642 HMAP_FOR_EACH_IN_BUCKET (xbridge
, hmap_node
, hash_pointer(ofproto
, 0),
1644 if (xbridge
->ofproto
== ofproto
) {
1651 static struct xbridge
*
1652 xbridge_lookup_by_uuid(struct xlate_cfg
*xcfg
, const struct uuid
*uuid
)
1654 struct xbridge
*xbridge
;
1656 HMAP_FOR_EACH (xbridge
, hmap_node
, &xcfg
->xbridges
) {
1657 if (uuid_equals(&xbridge
->ofproto
->uuid
, uuid
)) {
1664 static struct xbundle
*
1665 xbundle_lookup(struct xlate_cfg
*xcfg
, const struct ofbundle
*ofbundle
)
1667 struct hmap
*xbundles
;
1668 struct xbundle
*xbundle
;
1670 if (!ofbundle
|| !xcfg
) {
1674 xbundles
= &xcfg
->xbundles
;
1676 HMAP_FOR_EACH_IN_BUCKET (xbundle
, hmap_node
, hash_pointer(ofbundle
, 0),
1678 if (xbundle
->ofbundle
== ofbundle
) {
1685 static struct xport
*
1686 xport_lookup(struct xlate_cfg
*xcfg
, const struct ofport_dpif
*ofport
)
1688 struct hmap
*xports
;
1689 struct xport
*xport
;
1691 if (!ofport
|| !xcfg
) {
1695 xports
= &xcfg
->xports
;
1697 HMAP_FOR_EACH_IN_BUCKET (xport
, hmap_node
, hash_pointer(ofport
, 0),
1699 if (xport
->ofport
== ofport
) {
1706 static struct xport
*
1707 xport_lookup_by_uuid(struct xlate_cfg
*xcfg
, const struct uuid
*uuid
)
1709 struct hmap
*xports
;
1710 struct xport
*xport
;
1712 if (uuid_is_zero(uuid
) || !xcfg
) {
1716 xports
= &xcfg
->xports_uuid
;
1718 HMAP_FOR_EACH_IN_BUCKET (xport
, uuid_node
, uuid_hash(uuid
), xports
) {
1719 if (uuid_equals(&xport
->uuid
, uuid
)) {
1726 static struct stp_port
*
1727 xport_get_stp_port(const struct xport
*xport
)
1729 return xport
->xbridge
->stp
&& xport
->stp_port_no
!= -1
1730 ? stp_get_port(xport
->xbridge
->stp
, xport
->stp_port_no
)
1735 xport_stp_learn_state(const struct xport
*xport
)
1737 struct stp_port
*sp
= xport_get_stp_port(xport
);
1739 ? stp_learn_in_state(stp_port_get_state(sp
))
1744 xport_stp_forward_state(const struct xport
*xport
)
1746 struct stp_port
*sp
= xport_get_stp_port(xport
);
1748 ? stp_forward_in_state(stp_port_get_state(sp
))
1753 xport_stp_should_forward_bpdu(const struct xport
*xport
)
1755 struct stp_port
*sp
= xport_get_stp_port(xport
);
1756 return stp_should_forward_bpdu(sp
? stp_port_get_state(sp
) : STP_DISABLED
);
1759 /* Returns true if STP should process 'flow'. Sets fields in 'wc' that
1760 * were used to make the determination.*/
1762 stp_should_process_flow(const struct flow
*flow
, struct flow_wildcards
*wc
)
1764 /* is_stp() also checks dl_type, but dl_type is always set in 'wc'. */
1765 memset(&wc
->masks
.dl_dst
, 0xff, sizeof wc
->masks
.dl_dst
);
1766 return is_stp(flow
);
1770 stp_process_packet(const struct xport
*xport
, const struct dp_packet
*packet
)
1772 struct stp_port
*sp
= xport_get_stp_port(xport
);
1773 struct dp_packet payload
= *packet
;
1774 struct eth_header
*eth
= dp_packet_data(&payload
);
1776 /* Sink packets on ports that have STP disabled when the bridge has
1778 if (!sp
|| stp_port_get_state(sp
) == STP_DISABLED
) {
1782 /* Trim off padding on payload. */
1783 if (dp_packet_size(&payload
) > ntohs(eth
->eth_type
) + ETH_HEADER_LEN
) {
1784 dp_packet_set_size(&payload
, ntohs(eth
->eth_type
) + ETH_HEADER_LEN
);
1787 if (dp_packet_try_pull(&payload
, ETH_HEADER_LEN
+ LLC_HEADER_LEN
)) {
1788 stp_received_bpdu(sp
, dp_packet_data(&payload
), dp_packet_size(&payload
));
1792 static enum rstp_state
1793 xport_get_rstp_port_state(const struct xport
*xport
)
1795 return xport
->rstp_port
1796 ? rstp_port_get_state(xport
->rstp_port
)
1801 xport_rstp_learn_state(const struct xport
*xport
)
1803 return xport
->xbridge
->rstp
&& xport
->rstp_port
1804 ? rstp_learn_in_state(xport_get_rstp_port_state(xport
))
1809 xport_rstp_forward_state(const struct xport
*xport
)
1811 return xport
->xbridge
->rstp
&& xport
->rstp_port
1812 ? rstp_forward_in_state(xport_get_rstp_port_state(xport
))
1817 xport_rstp_should_manage_bpdu(const struct xport
*xport
)
1819 return rstp_should_manage_bpdu(xport_get_rstp_port_state(xport
));
1823 rstp_process_packet(const struct xport
*xport
, const struct dp_packet
*packet
)
1825 struct dp_packet payload
= *packet
;
1826 struct eth_header
*eth
= dp_packet_data(&payload
);
1828 /* Sink packets on ports that have no RSTP. */
1829 if (!xport
->rstp_port
) {
1833 /* Trim off padding on payload. */
1834 if (dp_packet_size(&payload
) > ntohs(eth
->eth_type
) + ETH_HEADER_LEN
) {
1835 dp_packet_set_size(&payload
, ntohs(eth
->eth_type
) + ETH_HEADER_LEN
);
1838 int len
= ETH_HEADER_LEN
+ LLC_HEADER_LEN
;
1839 if (eth
->eth_type
== htons(ETH_TYPE_VLAN
)) {
1840 len
+= VLAN_HEADER_LEN
;
1842 if (dp_packet_try_pull(&payload
, len
)) {
1843 rstp_port_received_bpdu(xport
->rstp_port
, dp_packet_data(&payload
),
1844 dp_packet_size(&payload
));
1848 static struct xport
*
1849 get_ofp_port(const struct xbridge
*xbridge
, ofp_port_t ofp_port
)
1851 struct xport
*xport
;
1853 HMAP_FOR_EACH_IN_BUCKET (xport
, ofp_node
, hash_ofp_port(ofp_port
),
1855 if (xport
->ofp_port
== ofp_port
) {
1863 ofp_port_to_odp_port(const struct xbridge
*xbridge
, ofp_port_t ofp_port
)
1865 const struct xport
*xport
= get_ofp_port(xbridge
, ofp_port
);
1866 return xport
? xport
->odp_port
: ODPP_NONE
;
1870 odp_port_is_alive(const struct xlate_ctx
*ctx
, ofp_port_t ofp_port
)
1872 struct xport
*xport
= get_ofp_port(ctx
->xbridge
, ofp_port
);
1873 return xport
&& xport
->may_enable
;
1876 static struct ofputil_bucket
*
1877 group_first_live_bucket(const struct xlate_ctx
*, const struct group_dpif
*,
1881 group_is_alive(const struct xlate_ctx
*ctx
, uint32_t group_id
, int depth
)
1883 struct group_dpif
*group
;
1885 group
= group_dpif_lookup(ctx
->xbridge
->ofproto
, group_id
,
1886 ctx
->xin
->tables_version
, false);
1888 return group_first_live_bucket(ctx
, group
, depth
) != NULL
;
1894 #define MAX_LIVENESS_RECURSION 128 /* Arbitrary limit */
1897 bucket_is_alive(const struct xlate_ctx
*ctx
,
1898 struct ofputil_bucket
*bucket
, int depth
)
1900 if (depth
>= MAX_LIVENESS_RECURSION
) {
1901 xlate_report_error(ctx
, "bucket chaining exceeded %d links",
1902 MAX_LIVENESS_RECURSION
);
1906 return (!ofputil_bucket_has_liveness(bucket
)
1907 || (bucket
->watch_port
!= OFPP_ANY
1908 && bucket
->watch_port
!= OFPP_CONTROLLER
1909 && odp_port_is_alive(ctx
, bucket
->watch_port
))
1910 || (bucket
->watch_group
!= OFPG_ANY
1911 && group_is_alive(ctx
, bucket
->watch_group
, depth
+ 1))
1912 || (bucket
->watch_port
== OFPP_CONTROLLER
1913 && ofproto_is_alive(&ctx
->xbridge
->ofproto
->up
)));
1917 xlate_report_bucket_not_live(const struct xlate_ctx
*ctx
,
1918 const struct ofputil_bucket
*bucket
)
1920 if (OVS_UNLIKELY(ctx
->xin
->trace
)) {
1921 struct ds s
= DS_EMPTY_INITIALIZER
;
1922 if (bucket
->watch_port
!= OFPP_ANY
) {
1923 ds_put_cstr(&s
, "port ");
1924 ofputil_format_port(bucket
->watch_port
, NULL
, &s
);
1926 if (bucket
->watch_group
!= OFPG_ANY
) {
1928 ds_put_cstr(&s
, " and ");
1930 ds_put_format(&s
, "port %"PRIu32
, bucket
->watch_group
);
1933 xlate_report(ctx
, OFT_DETAIL
, "bucket %"PRIu32
": not live due to %s",
1934 bucket
->bucket_id
, ds_cstr(&s
));
1940 static struct ofputil_bucket
*
1941 group_first_live_bucket(const struct xlate_ctx
*ctx
,
1942 const struct group_dpif
*group
, int depth
)
1944 struct ofputil_bucket
*bucket
;
1945 LIST_FOR_EACH (bucket
, list_node
, &group
->up
.buckets
) {
1946 if (bucket_is_alive(ctx
, bucket
, depth
)) {
1949 xlate_report_bucket_not_live(ctx
, bucket
);
1955 static struct ofputil_bucket
*
1956 group_best_live_bucket(const struct xlate_ctx
*ctx
,
1957 const struct group_dpif
*group
,
1960 struct ofputil_bucket
*best_bucket
= NULL
;
1961 uint32_t best_score
= 0;
1963 struct ofputil_bucket
*bucket
;
1964 LIST_FOR_EACH (bucket
, list_node
, &group
->up
.buckets
) {
1965 if (bucket_is_alive(ctx
, bucket
, 0)) {
1967 (hash_int(bucket
->bucket_id
, basis
) & 0xffff) * bucket
->weight
;
1968 if (score
>= best_score
) {
1969 best_bucket
= bucket
;
1972 xlate_report(ctx
, OFT_DETAIL
, "bucket %"PRIu32
": score %"PRIu32
,
1973 bucket
->bucket_id
, score
);
1975 xlate_report_bucket_not_live(ctx
, bucket
);
1983 xbundle_trunks_vlan(const struct xbundle
*bundle
, uint16_t vlan
)
1985 return (bundle
->vlan_mode
!= PORT_VLAN_ACCESS
1986 && (!bundle
->trunks
|| bitmap_is_set(bundle
->trunks
, vlan
)));
1990 xbundle_allows_cvlan(const struct xbundle
*bundle
, uint16_t vlan
)
1992 return (!bundle
->cvlans
|| bitmap_is_set(bundle
->cvlans
, vlan
));
1996 xbundle_includes_vlan(const struct xbundle
*xbundle
, const struct xvlan
*xvlan
)
1998 switch (xbundle
->vlan_mode
) {
1999 case PORT_VLAN_ACCESS
:
2000 return xvlan
->v
[0].vid
== xbundle
->vlan
&& xvlan
->v
[1].vid
== 0;
2002 case PORT_VLAN_TRUNK
:
2003 case PORT_VLAN_NATIVE_UNTAGGED
:
2004 case PORT_VLAN_NATIVE_TAGGED
:
2005 return xbundle_trunks_vlan(xbundle
, xvlan
->v
[0].vid
);
2007 case PORT_VLAN_DOT1Q_TUNNEL
:
2008 return xvlan
->v
[0].vid
== xbundle
->vlan
&&
2009 xbundle_allows_cvlan(xbundle
, xvlan
->v
[1].vid
);
2016 static mirror_mask_t
2017 xbundle_mirror_out(const struct xbridge
*xbridge
, struct xbundle
*xbundle
)
2019 return xbundle
!= &ofpp_none_bundle
2020 ? mirror_bundle_out(xbridge
->mbridge
, xbundle
->ofbundle
)
2024 static mirror_mask_t
2025 xbundle_mirror_src(const struct xbridge
*xbridge
, struct xbundle
*xbundle
)
2027 return xbundle
!= &ofpp_none_bundle
2028 ? mirror_bundle_src(xbridge
->mbridge
, xbundle
->ofbundle
)
2032 static mirror_mask_t
2033 xbundle_mirror_dst(const struct xbridge
*xbridge
, struct xbundle
*xbundle
)
2035 return xbundle
!= &ofpp_none_bundle
2036 ? mirror_bundle_dst(xbridge
->mbridge
, xbundle
->ofbundle
)
2040 static struct xbundle
*
2041 lookup_input_bundle__(const struct xbridge
*xbridge
,
2042 ofp_port_t in_port
, struct xport
**in_xportp
)
2044 struct xport
*xport
;
2046 /* Find the port and bundle for the received packet. */
2047 xport
= get_ofp_port(xbridge
, in_port
);
2051 if (xport
&& xport
->xbundle
) {
2052 return xport
->xbundle
;
2055 /* Special-case OFPP_NONE (OF1.0) and OFPP_CONTROLLER (OF1.1+),
2056 * which a controller may use as the ingress port for traffic that
2057 * it is sourcing. */
2058 if (in_port
== OFPP_CONTROLLER
|| in_port
== OFPP_NONE
) {
2059 return &ofpp_none_bundle
;
2064 static struct xbundle
*
2065 lookup_input_bundle(const struct xlate_ctx
*ctx
,
2066 ofp_port_t in_port
, struct xport
**in_xportp
)
2068 struct xbundle
*xbundle
= lookup_input_bundle__(ctx
->xbridge
,
2069 in_port
, in_xportp
);
2071 /* Odd. A few possible reasons here:
2073 * - We deleted a port but there are still a few packets queued up
2076 * - Someone externally added a port (e.g. "ovs-dpctl add-if") that
2077 * we don't know about.
2079 * - The ofproto client didn't configure the port as part of a bundle.
2080 * This is particularly likely to happen if a packet was received on
2081 * the port after it was created, but before the client had a chance
2082 * to configure its bundle.
2084 xlate_report_error(ctx
, "received packet on unknown port %"PRIu32
,
2090 /* Mirrors the packet represented by 'ctx' to appropriate mirror destinations,
2091 * given the packet is ingressing or egressing on 'xbundle', which has ingress
2092 * or egress (as appropriate) mirrors 'mirrors'. */
2094 mirror_packet(struct xlate_ctx
*ctx
, struct xbundle
*xbundle
,
2095 mirror_mask_t mirrors
)
2097 struct xvlan in_xvlan
;
2100 /* Figure out what VLAN the packet is in (because mirrors can select
2101 * packets on basis of VLAN). */
2102 xvlan_extract(&ctx
->xin
->flow
, &in_xvlan
);
2103 if (!input_vid_is_valid(ctx
, in_xvlan
.v
[0].vid
, xbundle
)) {
2106 xvlan_input_translate(xbundle
, &in_xvlan
, &xvlan
);
2108 const struct xbridge
*xbridge
= ctx
->xbridge
;
2110 /* Don't mirror to destinations that we've already mirrored to. */
2111 mirrors
&= ~ctx
->mirrors
;
2116 /* 'mirrors' is a bit-mask of candidates for mirroring. Iterate through
2117 * the candidates, adding the ones that really should be mirrored to
2118 * 'used_mirrors', as long as some candidates remain. */
2119 mirror_mask_t used_mirrors
= 0;
2121 const unsigned long *vlans
;
2122 mirror_mask_t dup_mirrors
;
2123 struct ofbundle
*out
;
2127 /* Get the details of the mirror represented by the rightmost 1-bit. */
2128 ovs_assert(mirror_get(xbridge
->mbridge
, raw_ctz(mirrors
),
2129 &vlans
, &dup_mirrors
,
2130 &out
, &snaplen
, &out_vlan
));
2133 /* If this mirror selects on the basis of VLAN, and it does not select
2134 * 'vlan', then discard this mirror and go on to the next one. */
2136 ctx
->wc
->masks
.vlans
[0].tci
|= htons(VLAN_CFI
| VLAN_VID_MASK
);
2138 if (vlans
&& !bitmap_is_set(vlans
, xvlan
.v
[0].vid
)) {
2139 mirrors
= zero_rightmost_1bit(mirrors
);
2143 /* We sent a packet to this mirror. */
2144 used_mirrors
|= rightmost_1bit(mirrors
);
2146 /* Record the mirror, and the mirrors that output to the same
2147 * destination, so that we don't mirror to them again. This must be
2148 * done now to ensure that output_normal(), below, doesn't recursively
2149 * output to the same mirrors. */
2150 ctx
->mirrors
|= dup_mirrors
;
2151 ctx
->mirror_snaplen
= snaplen
;
2153 /* Send the packet to the mirror. */
2155 struct xbundle
*out_xbundle
= xbundle_lookup(ctx
->xcfg
, out
);
2157 output_normal(ctx
, out_xbundle
, &xvlan
);
2159 } else if (xvlan
.v
[0].vid
!= out_vlan
2160 && !eth_addr_is_reserved(ctx
->xin
->flow
.dl_dst
)) {
2162 uint16_t old_vid
= xvlan
.v
[0].vid
;
2164 xvlan
.v
[0].vid
= out_vlan
;
2165 LIST_FOR_EACH (xb
, list_node
, &xbridge
->xbundles
) {
2166 if (xbundle_includes_vlan(xb
, &xvlan
)
2167 && !xbundle_mirror_out(xbridge
, xb
)) {
2168 output_normal(ctx
, xb
, &xvlan
);
2171 xvlan
.v
[0].vid
= old_vid
;
2174 /* output_normal() could have recursively output (to different
2175 * mirrors), so make sure that we don't send duplicates. */
2176 mirrors
&= ~ctx
->mirrors
;
2177 ctx
->mirror_snaplen
= 0;
2181 if (ctx
->xin
->resubmit_stats
) {
2182 mirror_update_stats(xbridge
->mbridge
, used_mirrors
,
2183 ctx
->xin
->resubmit_stats
->n_packets
,
2184 ctx
->xin
->resubmit_stats
->n_bytes
);
2186 if (ctx
->xin
->xcache
) {
2187 struct xc_entry
*entry
;
2189 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_MIRROR
);
2190 entry
->mirror
.mbridge
= mbridge_ref(xbridge
->mbridge
);
2191 entry
->mirror
.mirrors
= used_mirrors
;
2197 mirror_ingress_packet(struct xlate_ctx
*ctx
)
2199 if (mbridge_has_mirrors(ctx
->xbridge
->mbridge
)) {
2200 struct xbundle
*xbundle
= lookup_input_bundle(
2201 ctx
, ctx
->xin
->flow
.in_port
.ofp_port
, NULL
);
2203 mirror_packet(ctx
, xbundle
,
2204 xbundle_mirror_src(ctx
->xbridge
, xbundle
));
2209 /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'.
2210 * If so, returns true. Otherwise, returns false.
2212 * 'vid' should be the VID obtained from the 802.1Q header that was received as
2213 * part of a packet (specify 0 if there was no 802.1Q header), in the range
2216 input_vid_is_valid(const struct xlate_ctx
*ctx
,
2217 uint16_t vid
, struct xbundle
*in_xbundle
)
2219 /* Allow any VID on the OFPP_NONE port. */
2220 if (in_xbundle
== &ofpp_none_bundle
) {
2224 switch (in_xbundle
->vlan_mode
) {
2225 case PORT_VLAN_ACCESS
:
2227 xlate_report_error(ctx
, "dropping VLAN %"PRIu16
" tagged "
2228 "packet received on port %s configured as VLAN "
2229 "%d access port", vid
, in_xbundle
->name
,
2235 case PORT_VLAN_NATIVE_UNTAGGED
:
2236 case PORT_VLAN_NATIVE_TAGGED
:
2238 /* Port must always carry its native VLAN. */
2242 case PORT_VLAN_TRUNK
:
2243 if (!xbundle_trunks_vlan(in_xbundle
, vid
)) {
2244 xlate_report_error(ctx
, "dropping VLAN %"PRIu16
" packet "
2245 "received on port %s not configured for "
2246 "trunking VLAN %"PRIu16
,
2247 vid
, in_xbundle
->name
, vid
);
2252 case PORT_VLAN_DOT1Q_TUNNEL
:
2253 if (!xbundle_allows_cvlan(in_xbundle
, vid
)) {
2254 xlate_report_error(ctx
, "dropping VLAN %"PRIu16
" packet received "
2255 "on dot1q-tunnel port %s that excludes this "
2256 "VLAN", vid
, in_xbundle
->name
);
2268 xvlan_copy(struct xvlan
*dst
, const struct xvlan
*src
)
2274 xvlan_pop(struct xvlan
*src
)
2276 memmove(&src
->v
[0], &src
->v
[1], sizeof(src
->v
) - sizeof(src
->v
[0]));
2277 memset(&src
->v
[FLOW_MAX_VLAN_HEADERS
- 1], 0,
2278 sizeof(src
->v
[FLOW_MAX_VLAN_HEADERS
- 1]));
2282 xvlan_push_uninit(struct xvlan
*src
)
2284 memmove(&src
->v
[1], &src
->v
[0], sizeof(src
->v
) - sizeof(src
->v
[0]));
2285 memset(&src
->v
[0], 0, sizeof(src
->v
[0]));
2288 /* Extract VLAN information (headers) from flow */
2290 xvlan_extract(const struct flow
*flow
, struct xvlan
*xvlan
)
2293 memset(xvlan
, 0, sizeof(*xvlan
));
2294 for (i
= 0; i
< FLOW_MAX_VLAN_HEADERS
; i
++) {
2295 if (!eth_type_vlan(flow
->vlans
[i
].tpid
) ||
2296 !(flow
->vlans
[i
].tci
& htons(VLAN_CFI
))) {
2299 xvlan
->v
[i
].tpid
= ntohs(flow
->vlans
[i
].tpid
);
2300 xvlan
->v
[i
].vid
= vlan_tci_to_vid(flow
->vlans
[i
].tci
);
2301 xvlan
->v
[i
].pcp
= ntohs(flow
->vlans
[i
].tci
) & VLAN_PCP_MASK
;
2305 /* Put VLAN information (headers) to flow */
2307 xvlan_put(struct flow
*flow
, const struct xvlan
*xvlan
,
2308 enum port_priority_tags_mode use_priority_tags
)
2312 for (i
= 0; i
< FLOW_MAX_VLAN_HEADERS
; i
++) {
2313 tci
= htons(xvlan
->v
[i
].vid
| (xvlan
->v
[i
].pcp
& VLAN_PCP_MASK
));
2314 if (tci
|| ((use_priority_tags
== PORT_PRIORITY_TAGS_ALWAYS
) &&
2315 xvlan
->v
[i
].tpid
)) {
2316 tci
|= htons(VLAN_CFI
);
2317 flow
->vlans
[i
].tpid
= xvlan
->v
[i
].tpid
?
2318 htons(xvlan
->v
[i
].tpid
) :
2319 htons(ETH_TYPE_VLAN_8021Q
);
2321 flow
->vlans
[i
].tci
= tci
;
2325 /* Given 'in_xvlan', extracted from the input 802.1Q headers received as part
2326 * of a packet, and 'in_xbundle', the bundle on which the packet was received,
2327 * returns the VLANs of the packet during bridge internal processing. */
2329 xvlan_input_translate(const struct xbundle
*in_xbundle
,
2330 const struct xvlan
*in_xvlan
, struct xvlan
*xvlan
)
2333 switch (in_xbundle
->vlan_mode
) {
2334 case PORT_VLAN_ACCESS
:
2335 memset(xvlan
, 0, sizeof(*xvlan
));
2336 xvlan
->v
[0].tpid
= in_xvlan
->v
[0].tpid
? in_xvlan
->v
[0].tpid
:
2337 ETH_TYPE_VLAN_8021Q
;
2338 xvlan
->v
[0].vid
= in_xbundle
->vlan
;
2339 xvlan
->v
[0].pcp
= in_xvlan
->v
[0].pcp
;
2342 case PORT_VLAN_TRUNK
:
2343 xvlan_copy(xvlan
, in_xvlan
);
2346 case PORT_VLAN_NATIVE_UNTAGGED
:
2347 case PORT_VLAN_NATIVE_TAGGED
:
2348 xvlan_copy(xvlan
, in_xvlan
);
2349 if (!in_xvlan
->v
[0].vid
) {
2350 xvlan
->v
[0].tpid
= in_xvlan
->v
[0].tpid
? in_xvlan
->v
[0].tpid
:
2351 ETH_TYPE_VLAN_8021Q
;
2352 xvlan
->v
[0].vid
= in_xbundle
->vlan
;
2353 xvlan
->v
[0].pcp
= in_xvlan
->v
[0].pcp
;
2357 case PORT_VLAN_DOT1Q_TUNNEL
:
2358 xvlan_copy(xvlan
, in_xvlan
);
2359 xvlan_push_uninit(xvlan
);
2360 xvlan
->v
[0].tpid
= in_xbundle
->qinq_ethtype
;
2361 xvlan
->v
[0].vid
= in_xbundle
->vlan
;
2362 xvlan
->v
[0].pcp
= 0;
2370 /* Given 'xvlan', the VLANs of a packet during internal processing, and
2371 * 'out_xbundle', a bundle on which the packet is to be output, returns the
2372 * VLANs that should be included in output packet. */
2374 xvlan_output_translate(const struct xbundle
*out_xbundle
,
2375 const struct xvlan
*xvlan
, struct xvlan
*out_xvlan
)
2377 switch (out_xbundle
->vlan_mode
) {
2378 case PORT_VLAN_ACCESS
:
2379 memset(out_xvlan
, 0, sizeof(*out_xvlan
));
2382 case PORT_VLAN_TRUNK
:
2383 case PORT_VLAN_NATIVE_TAGGED
:
2384 xvlan_copy(out_xvlan
, xvlan
);
2387 case PORT_VLAN_NATIVE_UNTAGGED
:
2388 xvlan_copy(out_xvlan
, xvlan
);
2389 if (xvlan
->v
[0].vid
== out_xbundle
->vlan
) {
2390 xvlan_pop(out_xvlan
);
2394 case PORT_VLAN_DOT1Q_TUNNEL
:
2395 xvlan_copy(out_xvlan
, xvlan
);
2396 xvlan_pop(out_xvlan
);
2404 /* If output xbundle is dot1q-tunnel, set mask bits of cvlan */
2406 check_and_set_cvlan_mask(struct flow_wildcards
*wc
,
2407 const struct xbundle
*xbundle
)
2409 if (xbundle
->vlan_mode
== PORT_VLAN_DOT1Q_TUNNEL
&& xbundle
->cvlans
) {
2410 wc
->masks
.vlans
[1].tci
= htons(0xffff);
2415 output_normal(struct xlate_ctx
*ctx
, const struct xbundle
*out_xbundle
,
2416 const struct xvlan
*xvlan
)
2419 union flow_vlan_hdr old_vlans
[FLOW_MAX_VLAN_HEADERS
];
2420 struct xport
*xport
;
2421 struct xlate_bond_recirc xr
;
2422 bool use_recirc
= false;
2423 struct xvlan out_xvlan
;
2425 check_and_set_cvlan_mask(ctx
->wc
, out_xbundle
);
2427 xvlan_output_translate(out_xbundle
, xvlan
, &out_xvlan
);
2428 if (out_xbundle
->use_priority_tags
) {
2429 out_xvlan
.v
[0].pcp
= ntohs(ctx
->xin
->flow
.vlans
[0].tci
) &
2432 vid
= out_xvlan
.v
[0].vid
;
2433 if (ovs_list_is_empty(&out_xbundle
->xports
)) {
2434 /* Partially configured bundle with no members. Drop the packet. */
2436 } else if (!out_xbundle
->bond
) {
2437 xport
= CONTAINER_OF(ovs_list_front(&out_xbundle
->xports
), struct xport
,
2440 struct flow_wildcards
*wc
= ctx
->wc
;
2441 struct ofport_dpif
*ofport
;
2443 if (ctx
->xbridge
->support
.odp
.recirc
) {
2444 /* In case recirculation is not actually in use, 'xr.recirc_id'
2445 * will be set to '0', since a valid 'recirc_id' can
2447 bond_update_post_recirc_rules(out_xbundle
->bond
,
2451 /* Use recirculation instead of output. */
2453 xr
.hash_alg
= OVS_HASH_ALG_L4
;
2454 /* Recirculation does not require unmasking hash fields. */
2459 ofport
= bond_choose_output_member(out_xbundle
->bond
,
2460 &ctx
->xin
->flow
, wc
, vid
);
2461 xport
= xport_lookup(ctx
->xcfg
, ofport
);
2464 /* No member interfaces enabled, so drop packet. */
2468 /* If use_recirc is set, the main thread will handle stats
2469 * accounting for this bond. */
2471 if (ctx
->xin
->resubmit_stats
) {
2472 bond_account(out_xbundle
->bond
, &ctx
->xin
->flow
, vid
,
2473 ctx
->xin
->resubmit_stats
->n_bytes
);
2475 if (ctx
->xin
->xcache
) {
2476 struct xc_entry
*entry
;
2479 flow
= &ctx
->xin
->flow
;
2480 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_BOND
);
2481 entry
->bond
.bond
= bond_ref(out_xbundle
->bond
);
2482 entry
->bond
.flow
= xmemdup(flow
, sizeof *flow
);
2483 entry
->bond
.vid
= vid
;
2488 memcpy(&old_vlans
, &ctx
->xin
->flow
.vlans
, sizeof(old_vlans
));
2489 xvlan_put(&ctx
->xin
->flow
, &out_xvlan
, out_xbundle
->use_priority_tags
);
2491 compose_output_action(ctx
, xport
->ofp_port
, use_recirc
? &xr
: NULL
,
2493 memcpy(&ctx
->xin
->flow
.vlans
, &old_vlans
, sizeof(old_vlans
));
2496 /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after
2497 * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to
2498 * indicate this; newer upstream kernels use gratuitous ARP requests. */
2500 is_gratuitous_arp(const struct flow
*flow
, struct flow_wildcards
*wc
)
2502 if (flow
->dl_type
!= htons(ETH_TYPE_ARP
)) {
2506 memset(&wc
->masks
.dl_dst
, 0xff, sizeof wc
->masks
.dl_dst
);
2507 if (!eth_addr_is_broadcast(flow
->dl_dst
)) {
2511 memset(&wc
->masks
.nw_proto
, 0xff, sizeof wc
->masks
.nw_proto
);
2512 if (flow
->nw_proto
== ARP_OP_REPLY
) {
2514 } else if (flow
->nw_proto
== ARP_OP_REQUEST
) {
2515 memset(&wc
->masks
.nw_src
, 0xff, sizeof wc
->masks
.nw_src
);
2516 memset(&wc
->masks
.nw_dst
, 0xff, sizeof wc
->masks
.nw_dst
);
2518 return flow
->nw_src
== flow
->nw_dst
;
2524 /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or
2525 * dropped. Returns true if they may be forwarded, false if they should be
2528 * 'in_port' must be the xport that corresponds to flow->in_port.
2529 * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull).
2531 * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as
2532 * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as
2533 * checked by input_vid_is_valid().
2535 * May also add tags to '*tags', although the current implementation only does
2536 * so in one special case.
2539 is_admissible(struct xlate_ctx
*ctx
, struct xport
*in_port
,
2542 struct xbundle
*in_xbundle
= in_port
->xbundle
;
2543 const struct xbridge
*xbridge
= ctx
->xbridge
;
2544 struct flow
*flow
= &ctx
->xin
->flow
;
2546 /* Drop frames for reserved multicast addresses
2547 * only if forward_bpdu option is absent. */
2548 if (!xbridge
->forward_bpdu
&& eth_addr_is_reserved(flow
->dl_dst
)) {
2549 xlate_report(ctx
, OFT_DETAIL
,
2550 "packet has reserved destination MAC, dropping");
2554 if (in_xbundle
->bond
) {
2555 struct mac_entry
*mac
;
2557 switch (bond_check_admissibility(in_xbundle
->bond
, in_port
->ofport
,
2563 xlate_report(ctx
, OFT_DETAIL
,
2564 "bonding refused admissibility, dropping");
2567 case BV_DROP_IF_MOVED
:
2568 ovs_rwlock_rdlock(&xbridge
->ml
->rwlock
);
2569 mac
= mac_learning_lookup(xbridge
->ml
, flow
->dl_src
, vlan
);
2571 && mac_entry_get_port(xbridge
->ml
, mac
) != in_xbundle
->ofbundle
2572 && (!is_gratuitous_arp(flow
, ctx
->wc
)
2573 || mac_entry_is_grat_arp_locked(mac
))) {
2574 ovs_rwlock_unlock(&xbridge
->ml
->rwlock
);
2575 xlate_report(ctx
, OFT_DETAIL
,
2576 "SLB bond thinks this packet looped back, "
2580 ovs_rwlock_unlock(&xbridge
->ml
->rwlock
);
2589 update_learning_table__(const struct xbridge
*xbridge
,
2590 struct xbundle
*in_xbundle
, struct eth_addr dl_src
,
2591 int vlan
, bool is_grat_arp
)
2593 return (in_xbundle
== &ofpp_none_bundle
2594 || !mac_learning_update(xbridge
->ml
, dl_src
, vlan
,
2596 in_xbundle
->bond
!= NULL
,
2597 in_xbundle
->ofbundle
));
2601 update_learning_table(const struct xlate_ctx
*ctx
,
2602 struct xbundle
*in_xbundle
, struct eth_addr dl_src
,
2603 int vlan
, bool is_grat_arp
)
2605 if (!update_learning_table__(ctx
->xbridge
, in_xbundle
, dl_src
, vlan
,
2607 xlate_report_debug(ctx
, OFT_DETAIL
, "learned that "ETH_ADDR_FMT
" is "
2608 "on port %s in VLAN %d",
2609 ETH_ADDR_ARGS(dl_src
), in_xbundle
->name
, vlan
);
2613 /* Updates multicast snooping table 'ms' given that a packet matching 'flow'
2614 * was received on 'in_xbundle' in 'vlan' and is either Report or Query. */
2616 update_mcast_snooping_table4__(const struct xlate_ctx
*ctx
,
2617 const struct flow
*flow
,
2618 struct mcast_snooping
*ms
, int vlan
,
2619 struct xbundle
*in_xbundle
,
2620 const struct dp_packet
*packet
)
2621 OVS_REQ_WRLOCK(ms
->rwlock
)
2623 const struct igmp_header
*igmp
;
2626 ovs_be32 ip4
= flow
->igmp_group_ip4
;
2628 offset
= (char *) dp_packet_l4(packet
) - (char *) dp_packet_data(packet
);
2629 igmp
= dp_packet_at(packet
, offset
, IGMP_HEADER_LEN
);
2630 if (!igmp
|| csum(igmp
, dp_packet_l4_size(packet
)) != 0) {
2631 xlate_report_debug(ctx
, OFT_DETAIL
,
2632 "multicast snooping received bad IGMP "
2633 "checksum on port %s in VLAN %d",
2634 in_xbundle
->name
, vlan
);
2638 switch (ntohs(flow
->tp_src
)) {
2639 case IGMP_HOST_MEMBERSHIP_REPORT
:
2640 case IGMPV2_HOST_MEMBERSHIP_REPORT
:
2641 if (mcast_snooping_add_group4(ms
, ip4
, vlan
, in_xbundle
->ofbundle
)) {
2642 xlate_report_debug(ctx
, OFT_DETAIL
,
2643 "multicast snooping learned that "
2644 IP_FMT
" is on port %s in VLAN %d",
2645 IP_ARGS(ip4
), in_xbundle
->name
, vlan
);
2648 case IGMP_HOST_LEAVE_MESSAGE
:
2649 if (mcast_snooping_leave_group4(ms
, ip4
, vlan
, in_xbundle
->ofbundle
)) {
2650 xlate_report_debug(ctx
, OFT_DETAIL
, "multicast snooping leaving "
2651 IP_FMT
" is on port %s in VLAN %d",
2652 IP_ARGS(ip4
), in_xbundle
->name
, vlan
);
2655 case IGMP_HOST_MEMBERSHIP_QUERY
:
2656 if (flow
->nw_src
&& mcast_snooping_add_mrouter(ms
, vlan
,
2657 in_xbundle
->ofbundle
)) {
2658 xlate_report_debug(ctx
, OFT_DETAIL
, "multicast snooping query "
2659 "from "IP_FMT
" is on port %s in VLAN %d",
2660 IP_ARGS(flow
->nw_src
), in_xbundle
->name
, vlan
);
2663 case IGMPV3_HOST_MEMBERSHIP_REPORT
:
2664 count
= mcast_snooping_add_report(ms
, packet
, vlan
,
2665 in_xbundle
->ofbundle
);
2667 xlate_report_debug(ctx
, OFT_DETAIL
, "multicast snooping processed "
2668 "%d addresses on port %s in VLAN %d",
2669 count
, in_xbundle
->name
, vlan
);
2676 update_mcast_snooping_table6__(const struct xlate_ctx
*ctx
,
2677 const struct flow
*flow
,
2678 struct mcast_snooping
*ms
, int vlan
,
2679 struct xbundle
*in_xbundle
,
2680 const struct dp_packet
*packet
)
2681 OVS_REQ_WRLOCK(ms
->rwlock
)
2683 const struct mld_header
*mld
;
2687 offset
= (char *) dp_packet_l4(packet
) - (char *) dp_packet_data(packet
);
2688 mld
= dp_packet_at(packet
, offset
, MLD_HEADER_LEN
);
2691 packet_csum_upperlayer6(dp_packet_l3(packet
),
2692 mld
, IPPROTO_ICMPV6
,
2693 dp_packet_l4_size(packet
)) != 0) {
2694 xlate_report_debug(ctx
, OFT_DETAIL
, "multicast snooping received "
2695 "bad MLD checksum on port %s in VLAN %d",
2696 in_xbundle
->name
, vlan
);
2700 switch (ntohs(flow
->tp_src
)) {
2702 if (!ipv6_addr_equals(&flow
->ipv6_src
, &in6addr_any
)
2703 && mcast_snooping_add_mrouter(ms
, vlan
, in_xbundle
->ofbundle
)) {
2704 xlate_report_debug(ctx
, OFT_DETAIL
, "multicast snooping query on "
2705 "port %s in VLAN %d", in_xbundle
->name
, vlan
);
2711 count
= mcast_snooping_add_mld(ms
, packet
, vlan
, in_xbundle
->ofbundle
);
2713 xlate_report_debug(ctx
, OFT_DETAIL
, "multicast snooping processed "
2714 "%d addresses on port %s in VLAN %d",
2715 count
, in_xbundle
->name
, vlan
);
2721 /* Updates multicast snooping table 'ms' given that a packet matching 'flow'
2722 * was received on 'in_xbundle' in 'vlan'. */
2724 update_mcast_snooping_table(const struct xlate_ctx
*ctx
,
2725 const struct flow
*flow
, int vlan
,
2726 struct xbundle
*in_xbundle
,
2727 const struct dp_packet
*packet
)
2729 struct mcast_snooping
*ms
= ctx
->xbridge
->ms
;
2730 struct xbundle
*mcast_xbundle
;
2731 struct mcast_port_bundle
*fport
;
2733 /* Don't learn the OFPP_NONE port. */
2734 if (in_xbundle
== &ofpp_none_bundle
) {
2738 /* Don't learn from flood ports */
2739 mcast_xbundle
= NULL
;
2740 ovs_rwlock_wrlock(&ms
->rwlock
);
2741 LIST_FOR_EACH(fport
, node
, &ms
->fport_list
) {
2742 mcast_xbundle
= xbundle_lookup(ctx
->xcfg
, fport
->port
);
2743 if (mcast_xbundle
== in_xbundle
) {
2748 if (!mcast_xbundle
|| mcast_xbundle
!= in_xbundle
) {
2749 if (flow
->dl_type
== htons(ETH_TYPE_IP
)) {
2750 update_mcast_snooping_table4__(ctx
, flow
, ms
, vlan
,
2751 in_xbundle
, packet
);
2753 update_mcast_snooping_table6__(ctx
, flow
, ms
, vlan
,
2754 in_xbundle
, packet
);
2757 ovs_rwlock_unlock(&ms
->rwlock
);
2760 /* A list of multicast output ports.
2762 * We accumulate output ports and then do all the outputs afterward. It would
2763 * be more natural to do the outputs one at a time as we discover the need for
2764 * each one, but this can cause a deadlock because we need to take the
2765 * mcast_snooping's rwlock for reading to iterate through the port lists and
2766 * doing an output, if it goes to a patch port, can eventually come back to the
2767 * same mcast_snooping and attempt to take the write lock (see
2768 * https://github.com/openvswitch/ovs-issues/issues/153). */
2769 struct mcast_output
{
2770 /* Discrete ports. */
2771 struct xbundle
**xbundles
;
2772 size_t n
, allocated
;
2774 /* If set, flood to all ports. */
2777 #define MCAST_OUTPUT_INIT { NULL, 0, 0, false }
2779 /* Add 'mcast_bundle' to 'out'. */
2781 mcast_output_add(struct mcast_output
*out
, struct xbundle
*mcast_xbundle
)
2783 if (out
->n
>= out
->allocated
) {
2784 out
->xbundles
= x2nrealloc(out
->xbundles
, &out
->allocated
,
2785 sizeof *out
->xbundles
);
2787 out
->xbundles
[out
->n
++] = mcast_xbundle
;
2790 /* Outputs the packet in 'ctx' to all of the output ports in 'out', given input
2791 * bundle 'in_xbundle' and the current 'xvlan'. */
2793 mcast_output_finish(struct xlate_ctx
*ctx
, struct mcast_output
*out
,
2794 struct xbundle
*in_xbundle
, struct xvlan
*xvlan
)
2797 xlate_normal_flood(ctx
, in_xbundle
, xvlan
);
2799 for (size_t i
= 0; i
< out
->n
; i
++) {
2800 output_normal(ctx
, out
->xbundles
[i
], xvlan
);
2804 free(out
->xbundles
);
2807 /* send the packet to ports having the multicast group learned */
2809 xlate_normal_mcast_send_group(struct xlate_ctx
*ctx
,
2810 struct mcast_snooping
*ms OVS_UNUSED
,
2811 struct mcast_group
*grp
,
2812 struct xbundle
*in_xbundle
,
2813 struct mcast_output
*out
)
2814 OVS_REQ_RDLOCK(ms
->rwlock
)
2816 struct mcast_group_bundle
*b
;
2817 struct xbundle
*mcast_xbundle
;
2819 LIST_FOR_EACH(b
, bundle_node
, &grp
->bundle_lru
) {
2820 mcast_xbundle
= xbundle_lookup(ctx
->xcfg
, b
->port
);
2821 if (mcast_xbundle
&& mcast_xbundle
!= in_xbundle
) {
2822 xlate_report(ctx
, OFT_DETAIL
, "forwarding to mcast group port");
2823 mcast_output_add(out
, mcast_xbundle
);
2824 } else if (!mcast_xbundle
) {
2825 xlate_report(ctx
, OFT_WARN
,
2826 "mcast group port is unknown, dropping");
2828 xlate_report(ctx
, OFT_DETAIL
,
2829 "mcast group port is input port, dropping");
2834 /* send the packet to ports connected to multicast routers */
2836 xlate_normal_mcast_send_mrouters(struct xlate_ctx
*ctx
,
2837 struct mcast_snooping
*ms
,
2838 struct xbundle
*in_xbundle
,
2839 const struct xvlan
*xvlan
,
2840 struct mcast_output
*out
)
2841 OVS_REQ_RDLOCK(ms
->rwlock
)
2843 struct mcast_mrouter_bundle
*mrouter
;
2844 struct xbundle
*mcast_xbundle
;
2846 LIST_FOR_EACH(mrouter
, mrouter_node
, &ms
->mrouter_lru
) {
2847 mcast_xbundle
= xbundle_lookup(ctx
->xcfg
, mrouter
->port
);
2848 if (mcast_xbundle
&& mcast_xbundle
!= in_xbundle
2849 && mrouter
->vlan
== xvlan
->v
[0].vid
) {
2850 xlate_report(ctx
, OFT_DETAIL
, "forwarding to mcast router port");
2851 mcast_output_add(out
, mcast_xbundle
);
2852 } else if (!mcast_xbundle
) {
2853 xlate_report(ctx
, OFT_WARN
,
2854 "mcast router port is unknown, dropping");
2855 } else if (mrouter
->vlan
!= xvlan
->v
[0].vid
) {
2856 xlate_report(ctx
, OFT_DETAIL
,
2857 "mcast router is on another vlan, dropping");
2859 xlate_report(ctx
, OFT_DETAIL
,
2860 "mcast router port is input port, dropping");
2865 /* send the packet to ports flagged to be flooded */
2867 xlate_normal_mcast_send_fports(struct xlate_ctx
*ctx
,
2868 struct mcast_snooping
*ms
,
2869 struct xbundle
*in_xbundle
,
2870 struct mcast_output
*out
)
2871 OVS_REQ_RDLOCK(ms
->rwlock
)
2873 struct mcast_port_bundle
*fport
;
2874 struct xbundle
*mcast_xbundle
;
2876 LIST_FOR_EACH(fport
, node
, &ms
->fport_list
) {
2877 mcast_xbundle
= xbundle_lookup(ctx
->xcfg
, fport
->port
);
2878 if (mcast_xbundle
&& mcast_xbundle
!= in_xbundle
) {
2879 xlate_report(ctx
, OFT_DETAIL
, "forwarding to mcast flood port");
2880 mcast_output_add(out
, mcast_xbundle
);
2881 } else if (!mcast_xbundle
) {
2882 xlate_report(ctx
, OFT_WARN
,
2883 "mcast flood port is unknown, dropping");
2885 xlate_report(ctx
, OFT_DETAIL
,
2886 "mcast flood port is input port, dropping");
2891 /* forward the Reports to configured ports */
2893 xlate_normal_mcast_send_rports(struct xlate_ctx
*ctx
,
2894 struct mcast_snooping
*ms
,
2895 struct xbundle
*in_xbundle
,
2896 struct mcast_output
*out
)
2897 OVS_REQ_RDLOCK(ms
->rwlock
)
2899 struct mcast_port_bundle
*rport
;
2900 struct xbundle
*mcast_xbundle
;
2902 LIST_FOR_EACH(rport
, node
, &ms
->rport_list
) {
2903 mcast_xbundle
= xbundle_lookup(ctx
->xcfg
, rport
->port
);
2905 && mcast_xbundle
!= in_xbundle
2906 && mcast_xbundle
->ofbundle
!= in_xbundle
->ofbundle
) {
2907 xlate_report(ctx
, OFT_DETAIL
,
2908 "forwarding report to mcast flagged port");
2909 mcast_output_add(out
, mcast_xbundle
);
2910 } else if (!mcast_xbundle
) {
2911 xlate_report(ctx
, OFT_WARN
,
2912 "mcast port is unknown, dropping the report");
2914 xlate_report(ctx
, OFT_DETAIL
,
2915 "mcast port is input port, dropping the Report");
2921 xlate_normal_flood(struct xlate_ctx
*ctx
, struct xbundle
*in_xbundle
,
2922 struct xvlan
*xvlan
)
2924 struct xbundle
*xbundle
;
2926 LIST_FOR_EACH (xbundle
, list_node
, &ctx
->xbridge
->xbundles
) {
2927 if (xbundle
!= in_xbundle
2928 && xbundle
->ofbundle
!= in_xbundle
->ofbundle
2929 && xbundle_includes_vlan(xbundle
, xvlan
)
2930 && xbundle
->floodable
2931 && !xbundle_mirror_out(ctx
->xbridge
, xbundle
)) {
2932 output_normal(ctx
, xbundle
, xvlan
);
2935 ctx
->nf_output_iface
= NF_OUT_FLOOD
;
2939 is_ip_local_multicast(const struct flow
*flow
, struct flow_wildcards
*wc
)
2941 if (flow
->dl_type
== htons(ETH_TYPE_IP
)) {
2942 memset(&wc
->masks
.nw_dst
, 0xff, sizeof wc
->masks
.nw_dst
);
2943 return ip_is_local_multicast(flow
->nw_dst
);
2944 } else if (flow
->dl_type
== htons(ETH_TYPE_IPV6
)) {
2945 memset(&wc
->masks
.ipv6_dst
, 0xff, sizeof wc
->masks
.ipv6_dst
);
2946 return ipv6_is_all_hosts(&flow
->ipv6_dst
);
2953 xlate_normal(struct xlate_ctx
*ctx
)
2955 struct flow_wildcards
*wc
= ctx
->wc
;
2956 struct flow
*flow
= &ctx
->xin
->flow
;
2957 struct xbundle
*in_xbundle
;
2958 struct xport
*in_port
;
2959 struct mac_entry
*mac
;
2961 struct xvlan in_xvlan
;
2965 memset(&wc
->masks
.dl_src
, 0xff, sizeof wc
->masks
.dl_src
);
2966 memset(&wc
->masks
.dl_dst
, 0xff, sizeof wc
->masks
.dl_dst
);
2967 wc
->masks
.vlans
[0].tci
|= htons(VLAN_VID_MASK
| VLAN_CFI
);
2969 in_xbundle
= lookup_input_bundle(ctx
, flow
->in_port
.ofp_port
, &in_port
);
2971 xlate_report(ctx
, OFT_WARN
, "no input bundle, dropping");
2975 /* Drop malformed frames. */
2976 if (eth_type_vlan(flow
->dl_type
) &&
2977 !(flow
->vlans
[0].tci
& htons(VLAN_CFI
))) {
2978 if (ctx
->xin
->packet
!= NULL
) {
2979 xlate_report_error(ctx
, "dropping packet with partial "
2980 "VLAN tag received on port %s",
2983 xlate_report(ctx
, OFT_WARN
, "partial VLAN tag, dropping");
2987 /* Drop frames on bundles reserved for mirroring. */
2988 if (xbundle_mirror_out(ctx
->xbridge
, in_xbundle
)) {
2989 if (ctx
->xin
->packet
!= NULL
) {
2990 xlate_report_error(ctx
, "dropping packet received on port %s, "
2991 "which is reserved exclusively for mirroring",
2994 xlate_report(ctx
, OFT_WARN
,
2995 "input port is mirror output port, dropping");
3000 xvlan_extract(flow
, &in_xvlan
);
3001 if (!input_vid_is_valid(ctx
, in_xvlan
.v
[0].vid
, in_xbundle
)) {
3002 xlate_report(ctx
, OFT_WARN
,
3003 "disallowed VLAN VID for this input port, dropping");
3006 xvlan_input_translate(in_xbundle
, &in_xvlan
, &xvlan
);
3007 vlan
= xvlan
.v
[0].vid
;
3009 /* Check other admissibility requirements. */
3010 if (in_port
&& !is_admissible(ctx
, in_port
, vlan
)) {
3014 /* Learn source MAC. */
3015 bool is_grat_arp
= is_gratuitous_arp(flow
, wc
);
3016 if (ctx
->xin
->allow_side_effects
3017 && flow
->packet_type
== htonl(PT_ETH
)
3018 && in_port
->pt_mode
!= NETDEV_PT_LEGACY_L3
3020 update_learning_table(ctx
, in_xbundle
, flow
->dl_src
, vlan
,
3023 if (ctx
->xin
->xcache
&& in_xbundle
!= &ofpp_none_bundle
) {
3024 struct xc_entry
*entry
;
3026 /* Save just enough info to update mac learning table later. */
3027 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_NORMAL
);
3028 entry
->normal
.ofproto
= ctx
->xbridge
->ofproto
;
3029 entry
->normal
.in_port
= flow
->in_port
.ofp_port
;
3030 entry
->normal
.dl_src
= flow
->dl_src
;
3031 entry
->normal
.vlan
= vlan
;
3032 entry
->normal
.is_gratuitous_arp
= is_grat_arp
;
3035 /* Determine output bundle. */
3036 if (mcast_snooping_enabled(ctx
->xbridge
->ms
)
3037 && !eth_addr_is_broadcast(flow
->dl_dst
)
3038 && eth_addr_is_multicast(flow
->dl_dst
)
3039 && is_ip_any(flow
)) {
3040 struct mcast_snooping
*ms
= ctx
->xbridge
->ms
;
3041 struct mcast_group
*grp
= NULL
;
3043 if (is_igmp(flow
, wc
)) {
3045 * IGMP packets need to take the slow path, in order to be
3046 * processed for mdb updates. That will prevent expires
3047 * firing off even after hosts have sent reports.
3049 ctx
->xout
->slow
|= SLOW_ACTION
;
3051 memset(&wc
->masks
.tp_src
, 0xff, sizeof wc
->masks
.tp_src
);
3052 if (mcast_snooping_is_membership(flow
->tp_src
) ||
3053 mcast_snooping_is_query(flow
->tp_src
)) {
3054 if (ctx
->xin
->allow_side_effects
&& ctx
->xin
->packet
) {
3055 update_mcast_snooping_table(ctx
, flow
, vlan
,
3056 in_xbundle
, ctx
->xin
->packet
);
3060 if (mcast_snooping_is_membership(flow
->tp_src
)) {
3061 struct mcast_output out
= MCAST_OUTPUT_INIT
;
3063 ovs_rwlock_rdlock(&ms
->rwlock
);
3064 xlate_normal_mcast_send_mrouters(ctx
, ms
, in_xbundle
, &xvlan
,
3066 /* RFC4541: section 2.1.1, item 1: A snooping switch should
3067 * forward IGMP Membership Reports only to those ports where
3068 * multicast routers are attached. Alternatively stated: a
3069 * snooping switch should not forward IGMP Membership Reports
3070 * to ports on which only hosts are attached.
3071 * An administrative control may be provided to override this
3072 * restriction, allowing the report messages to be flooded to
3074 xlate_normal_mcast_send_rports(ctx
, ms
, in_xbundle
, &out
);
3075 ovs_rwlock_unlock(&ms
->rwlock
);
3077 mcast_output_finish(ctx
, &out
, in_xbundle
, &xvlan
);
3079 xlate_report(ctx
, OFT_DETAIL
, "multicast traffic, flooding");
3080 xlate_normal_flood(ctx
, in_xbundle
, &xvlan
);
3083 } else if (is_mld(flow
, wc
)) {
3084 ctx
->xout
->slow
|= SLOW_ACTION
;
3085 if (ctx
->xin
->allow_side_effects
&& ctx
->xin
->packet
) {
3086 update_mcast_snooping_table(ctx
, flow
, vlan
,
3087 in_xbundle
, ctx
->xin
->packet
);
3089 if (is_mld_report(flow
, wc
)) {
3090 struct mcast_output out
= MCAST_OUTPUT_INIT
;
3092 ovs_rwlock_rdlock(&ms
->rwlock
);
3093 xlate_normal_mcast_send_mrouters(ctx
, ms
, in_xbundle
, &xvlan
,
3095 xlate_normal_mcast_send_rports(ctx
, ms
, in_xbundle
, &out
);
3096 ovs_rwlock_unlock(&ms
->rwlock
);
3098 mcast_output_finish(ctx
, &out
, in_xbundle
, &xvlan
);
3100 xlate_report(ctx
, OFT_DETAIL
, "MLD query, flooding");
3101 xlate_normal_flood(ctx
, in_xbundle
, &xvlan
);
3105 if (is_ip_local_multicast(flow
, wc
)) {
3106 /* RFC4541: section 2.1.2, item 2: Packets with a dst IP
3107 * address in the 224.0.0.x range which are not IGMP must
3108 * be forwarded on all ports */
3109 xlate_report(ctx
, OFT_DETAIL
,
3110 "RFC4541: section 2.1.2, item 2, flooding");
3111 xlate_normal_flood(ctx
, in_xbundle
, &xvlan
);
3116 /* forwarding to group base ports */
3117 struct mcast_output out
= MCAST_OUTPUT_INIT
;
3119 ovs_rwlock_rdlock(&ms
->rwlock
);
3120 if (flow
->dl_type
== htons(ETH_TYPE_IP
)) {
3121 grp
= mcast_snooping_lookup4(ms
, flow
->nw_dst
, vlan
);
3122 } else if (flow
->dl_type
== htons(ETH_TYPE_IPV6
)) {
3123 grp
= mcast_snooping_lookup(ms
, &flow
->ipv6_dst
, vlan
);
3126 xlate_normal_mcast_send_group(ctx
, ms
, grp
, in_xbundle
, &out
);
3127 xlate_normal_mcast_send_fports(ctx
, ms
, in_xbundle
, &out
);
3128 xlate_normal_mcast_send_mrouters(ctx
, ms
, in_xbundle
, &xvlan
,
3131 if (mcast_snooping_flood_unreg(ms
)) {
3132 xlate_report(ctx
, OFT_DETAIL
,
3133 "unregistered multicast, flooding");
3136 xlate_normal_mcast_send_mrouters(ctx
, ms
, in_xbundle
, &xvlan
,
3138 xlate_normal_mcast_send_fports(ctx
, ms
, in_xbundle
, &out
);
3141 ovs_rwlock_unlock(&ms
->rwlock
);
3143 mcast_output_finish(ctx
, &out
, in_xbundle
, &xvlan
);
3145 ovs_rwlock_rdlock(&ctx
->xbridge
->ml
->rwlock
);
3146 mac
= mac_learning_lookup(ctx
->xbridge
->ml
, flow
->dl_dst
, vlan
);
3147 mac_port
= mac
? mac_entry_get_port(ctx
->xbridge
->ml
, mac
) : NULL
;
3148 ovs_rwlock_unlock(&ctx
->xbridge
->ml
->rwlock
);
3151 struct xbundle
*mac_xbundle
= xbundle_lookup(ctx
->xcfg
, mac_port
);
3153 if (mac_xbundle
&& xbundle_mirror_out(ctx
->xbridge
, mac_xbundle
)) {
3154 xlate_report(ctx
, OFT_WARN
,
3155 "learned port is a mirror port, dropping");
3160 && mac_xbundle
!= in_xbundle
3161 && mac_xbundle
->ofbundle
!= in_xbundle
->ofbundle
) {
3162 xlate_report(ctx
, OFT_DETAIL
, "forwarding to learned port");
3163 output_normal(ctx
, mac_xbundle
, &xvlan
);
3164 } else if (!mac_xbundle
) {
3165 xlate_report(ctx
, OFT_WARN
,
3166 "learned port is unknown, dropping");
3168 xlate_report(ctx
, OFT_DETAIL
,
3169 "learned port is input port, dropping");
3172 xlate_report(ctx
, OFT_DETAIL
,
3173 "no learned MAC for destination, flooding");
3174 xlate_normal_flood(ctx
, in_xbundle
, &xvlan
);
3179 /* Appends a "sample" action for sFlow or IPFIX to 'ctx->odp_actions'. The
3180 * 'probability' is the number of packets out of UINT32_MAX to sample. The
3181 * 'cookie' is passed back in the callback for each sampled packet.
3182 * 'tunnel_out_port', if not ODPP_NONE, is added as the
3183 * OVS_USERSPACE_ATTR_EGRESS_TUN_PORT attribute. If 'include_actions',
3184 * an OVS_USERSPACE_ATTR_ACTIONS attribute is added. If
3185 * 'emit_set_tunnel', sample(sampling_port=1) would translate into
3186 * datapath sample action set(tunnel(...)), sample(...) and it is used
3187 * for sampling egress tunnel information.
3190 compose_sample_action(struct xlate_ctx
*ctx
,
3191 const uint32_t probability
,
3192 const struct user_action_cookie
*cookie
,
3193 const odp_port_t tunnel_out_port
,
3194 bool include_actions
)
3196 if (probability
== 0) {
3197 /* No need to generate sampling or the inner action. */
3201 /* If the slow path meter is configured by the controller,
3202 * insert a meter action before the user space action. */
3203 struct ofproto
*ofproto
= &ctx
->xin
->ofproto
->up
;
3204 uint32_t meter_id
= ofproto
->slowpath_meter_id
;
3206 /* When meter action is not required, avoid generate sample action
3207 * for 100% sampling rate. */
3208 bool is_sample
= probability
< UINT32_MAX
|| meter_id
!= UINT32_MAX
;
3209 size_t sample_offset
= 0, actions_offset
= 0;
3211 sample_offset
= nl_msg_start_nested(ctx
->odp_actions
,
3212 OVS_ACTION_ATTR_SAMPLE
);
3213 nl_msg_put_u32(ctx
->odp_actions
, OVS_SAMPLE_ATTR_PROBABILITY
,
3215 actions_offset
= nl_msg_start_nested(ctx
->odp_actions
,
3216 OVS_SAMPLE_ATTR_ACTIONS
);
3219 if (meter_id
!= UINT32_MAX
) {
3220 nl_msg_put_u32(ctx
->odp_actions
, OVS_ACTION_ATTR_METER
, meter_id
);
3223 odp_port_t odp_port
= ofp_port_to_odp_port(
3224 ctx
->xbridge
, ctx
->xin
->flow
.in_port
.ofp_port
);
3225 uint32_t pid
= dpif_port_get_pid(ctx
->xbridge
->dpif
, odp_port
);
3226 size_t cookie_offset
;
3227 int res
= odp_put_userspace_action(pid
, cookie
, sizeof *cookie
,
3228 tunnel_out_port
, include_actions
,
3229 ctx
->odp_actions
, &cookie_offset
);
3230 ovs_assert(res
== 0);
3232 nl_msg_end_nested(ctx
->odp_actions
, actions_offset
);
3233 nl_msg_end_nested(ctx
->odp_actions
, sample_offset
);
3236 return cookie_offset
;
3239 /* If sFLow is not enabled, returns 0 without doing anything.
3241 * If sFlow is enabled, appends a template "sample" action to the ODP actions
3242 * in 'ctx'. This action is a template because some of the information needed
3243 * to fill it out is not available until flow translation is complete. In this
3244 * case, this functions returns an offset, which is always nonzero, to pass
3245 * later to fix_sflow_action() to fill in the rest of the template. */
3247 compose_sflow_action(struct xlate_ctx
*ctx
)
3249 struct dpif_sflow
*sflow
= ctx
->xbridge
->sflow
;
3250 if (!sflow
|| ctx
->xin
->flow
.in_port
.ofp_port
== OFPP_NONE
) {
3254 struct user_action_cookie cookie
;
3256 memset(&cookie
, 0, sizeof cookie
);
3257 cookie
.type
= USER_ACTION_COOKIE_SFLOW
;
3258 cookie
.ofp_in_port
= ctx
->xin
->flow
.in_port
.ofp_port
;
3259 cookie
.ofproto_uuid
= ctx
->xbridge
->ofproto
->uuid
;
3261 return compose_sample_action(ctx
, dpif_sflow_get_probability(sflow
),
3262 &cookie
, ODPP_NONE
, true);
3265 /* If flow IPFIX is enabled, make sure IPFIX flow sample action
3266 * at egress point of tunnel port is just in front of corresponding
3267 * output action. If bridge IPFIX is enabled, this appends an IPFIX
3268 * sample action to 'ctx->odp_actions'. */
3270 compose_ipfix_action(struct xlate_ctx
*ctx
, odp_port_t output_odp_port
)
3272 struct dpif_ipfix
*ipfix
= ctx
->xbridge
->ipfix
;
3273 odp_port_t tunnel_out_port
= ODPP_NONE
;
3275 if (!ipfix
|| ctx
->xin
->flow
.in_port
.ofp_port
== OFPP_NONE
) {
3279 /* For input case, output_odp_port is ODPP_NONE, which is an invalid port
3281 if (output_odp_port
== ODPP_NONE
&&
3282 !dpif_ipfix_get_bridge_exporter_input_sampling(ipfix
)) {
3286 /* For output case, output_odp_port is valid. */
3287 if (output_odp_port
!= ODPP_NONE
) {
3288 if (!dpif_ipfix_get_bridge_exporter_output_sampling(ipfix
)) {
3291 /* If tunnel sampling is enabled, put an additional option attribute:
3292 * OVS_USERSPACE_ATTR_TUNNEL_OUT_PORT
3294 if (dpif_ipfix_get_bridge_exporter_tunnel_sampling(ipfix
) &&
3295 dpif_ipfix_is_tunnel_port(ipfix
, output_odp_port
) ) {
3296 tunnel_out_port
= output_odp_port
;
3300 struct user_action_cookie cookie
;
3302 memset(&cookie
, 0, sizeof cookie
);
3303 cookie
.type
= USER_ACTION_COOKIE_IPFIX
;
3304 cookie
.ofp_in_port
= ctx
->xin
->flow
.in_port
.ofp_port
;
3305 cookie
.ofproto_uuid
= ctx
->xbridge
->ofproto
->uuid
;
3306 cookie
.ipfix
.output_odp_port
= output_odp_port
;
3308 compose_sample_action(ctx
,
3309 dpif_ipfix_get_bridge_exporter_probability(ipfix
),
3310 &cookie
, tunnel_out_port
, false);
3313 /* Fix "sample" action according to data collected while composing ODP actions,
3314 * as described in compose_sflow_action().
3316 * 'user_cookie_offset' must be the offset returned by
3317 * compose_sflow_action(). */
3319 fix_sflow_action(struct xlate_ctx
*ctx
, unsigned int user_cookie_offset
)
3321 const struct flow
*base
= &ctx
->base_flow
;
3322 struct user_action_cookie
*cookie
;
3324 cookie
= ofpbuf_at(ctx
->odp_actions
, user_cookie_offset
, sizeof *cookie
);
3325 ovs_assert(cookie
->type
== USER_ACTION_COOKIE_SFLOW
);
3327 cookie
->sflow
.vlan_tci
= base
->vlans
[0].tci
;
3329 /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output
3330 * port information") for the interpretation of cookie->output. */
3331 switch (ctx
->sflow_n_outputs
) {
3333 /* 0x40000000 | 256 means "packet dropped for unknown reason". */
3334 cookie
->sflow
.output
= 0x40000000 | 256;
3338 cookie
->sflow
.output
= dpif_sflow_odp_port_to_ifindex(
3339 ctx
->xbridge
->sflow
, ctx
->sflow_odp_port
);
3340 if (cookie
->sflow
.output
) {
3345 /* 0x80000000 means "multiple output ports. */
3346 cookie
->sflow
.output
= 0x80000000 | ctx
->sflow_n_outputs
;
3352 process_special(struct xlate_ctx
*ctx
, const struct xport
*xport
)
3354 const struct flow
*flow
= &ctx
->xin
->flow
;
3355 struct flow_wildcards
*wc
= ctx
->wc
;
3356 const struct xbridge
*xbridge
= ctx
->xbridge
;
3357 const struct dp_packet
*packet
= ctx
->xin
->packet
;
3358 enum slow_path_reason slow
;
3359 bool lacp_may_enable
;
3363 } else if (xport
->cfm
&& cfm_should_process_flow(xport
->cfm
, flow
, wc
)) {
3365 cfm_process_heartbeat(xport
->cfm
, packet
);
3368 } else if (xport
->bfd
&& bfd_should_process_flow(xport
->bfd
, flow
, wc
)) {
3370 bfd_process_packet(xport
->bfd
, flow
, packet
);
3371 /* If POLL received, immediately sends FINAL back. */
3372 if (bfd_should_send_packet(xport
->bfd
)) {
3373 ofproto_dpif_monitor_port_send_soon(xport
->ofport
);
3377 } else if (xport
->xbundle
&& xport
->xbundle
->lacp
3378 && flow
->dl_type
== htons(ETH_TYPE_LACP
)) {
3380 lacp_may_enable
= lacp_process_packet(xport
->xbundle
->lacp
,
3381 xport
->ofport
, packet
);
3382 /* Update LACP status in bond-member to avoid packet-drops
3383 * until LACP state machine is run by the main thread. */
3384 if (xport
->xbundle
->bond
&& lacp_may_enable
) {
3385 bond_member_set_may_enable(xport
->xbundle
->bond
, xport
->ofport
,
3390 } else if ((xbridge
->stp
|| xbridge
->rstp
) &&
3391 stp_should_process_flow(flow
, wc
)) {
3394 ? stp_process_packet(xport
, packet
)
3395 : rstp_process_packet(xport
, packet
);
3398 } else if (xport
->lldp
&& lldp_should_process_flow(xport
->lldp
, flow
)) {
3400 lldp_process_packet(xport
->lldp
, packet
);
3408 ctx
->xout
->slow
|= slow
;
3416 tnl_route_lookup_flow(const struct xlate_ctx
*ctx
,
3417 const struct flow
*oflow
,
3418 struct in6_addr
*ip
, struct in6_addr
*src
,
3419 struct xport
**out_port
)
3421 char out_dev
[IFNAMSIZ
];
3422 struct xbridge
*xbridge
;
3424 struct in6_addr dst
;
3426 dst
= flow_tnl_dst(&oflow
->tunnel
);
3427 if (!ovs_router_lookup(oflow
->pkt_mark
, &dst
, out_dev
, src
, &gw
)) {
3431 if (ipv6_addr_is_set(&gw
) &&
3432 (!IN6_IS_ADDR_V4MAPPED(&gw
) || in6_addr_get_mapped_ipv4(&gw
))) {
3438 HMAP_FOR_EACH (xbridge
, hmap_node
, &ctx
->xcfg
->xbridges
) {
3439 if (!strncmp(xbridge
->name
, out_dev
, IFNAMSIZ
)) {
3442 HMAP_FOR_EACH (port
, ofp_node
, &xbridge
->xports
) {
3443 if (!strncmp(netdev_get_name(port
->netdev
), out_dev
, IFNAMSIZ
)) {
3451 /* If tunnel IP isn't configured on bridges, then we search all ports. */
3452 HMAP_FOR_EACH (xbridge
, hmap_node
, &ctx
->xcfg
->xbridges
) {
3455 HMAP_FOR_EACH (port
, ofp_node
, &xbridge
->xports
) {
3456 if (!strncmp(netdev_get_name(port
->netdev
),
3457 out_dev
, IFNAMSIZ
)) {
3467 compose_table_xlate(struct xlate_ctx
*ctx
, const struct xport
*out_dev
,
3468 struct dp_packet
*packet
)
3470 struct xbridge
*xbridge
= out_dev
->xbridge
;
3471 ovs_version_t version
= ofproto_dpif_get_tables_version(xbridge
->ofproto
);
3472 struct ofpact_output output
;
3475 ofpact_init(&output
.ofpact
, OFPACT_OUTPUT
, sizeof output
);
3476 flow_extract(packet
, &flow
);
3477 flow
.in_port
.ofp_port
= out_dev
->ofp_port
;
3478 output
.port
= OFPP_TABLE
;
3481 return ofproto_dpif_execute_actions__(xbridge
->ofproto
, version
, &flow
,
3482 NULL
, &output
.ofpact
, sizeof output
,
3483 ctx
->depth
, ctx
->resubmits
, packet
);
3487 tnl_send_nd_request(struct xlate_ctx
*ctx
, const struct xport
*out_dev
,
3488 const struct eth_addr eth_src
,
3489 struct in6_addr
* ipv6_src
, struct in6_addr
* ipv6_dst
)
3491 struct dp_packet packet
;
3493 dp_packet_init(&packet
, 0);
3494 compose_nd_ns(&packet
, eth_src
, ipv6_src
, ipv6_dst
);
3495 compose_table_xlate(ctx
, out_dev
, &packet
);
3496 dp_packet_uninit(&packet
);
3500 tnl_send_arp_request(struct xlate_ctx
*ctx
, const struct xport
*out_dev
,
3501 const struct eth_addr eth_src
,
3502 ovs_be32 ip_src
, ovs_be32 ip_dst
)
3504 struct dp_packet packet
;
3506 dp_packet_init(&packet
, 0);
3507 compose_arp(&packet
, ARP_OP_REQUEST
,
3508 eth_src
, eth_addr_zero
, true, ip_src
, ip_dst
);
3510 compose_table_xlate(ctx
, out_dev
, &packet
);
3511 dp_packet_uninit(&packet
);
3515 propagate_tunnel_data_to_flow__(struct flow
*dst_flow
,
3516 const struct flow
*src_flow
,
3517 struct eth_addr dmac
, struct eth_addr smac
,
3518 struct in6_addr s_ip6
, ovs_be32 s_ip
,
3519 bool is_tnl_ipv6
, uint8_t nw_proto
)
3521 dst_flow
->dl_dst
= dmac
;
3522 dst_flow
->dl_src
= smac
;
3524 dst_flow
->packet_type
= htonl(PT_ETH
);
3525 dst_flow
->nw_dst
= src_flow
->tunnel
.ip_dst
;
3526 dst_flow
->nw_src
= src_flow
->tunnel
.ip_src
;
3527 dst_flow
->ipv6_dst
= src_flow
->tunnel
.ipv6_dst
;
3528 dst_flow
->ipv6_src
= src_flow
->tunnel
.ipv6_src
;
3530 dst_flow
->nw_frag
= 0; /* Tunnel packets are unfragmented. */
3531 dst_flow
->nw_tos
= src_flow
->tunnel
.ip_tos
;
3532 dst_flow
->nw_ttl
= src_flow
->tunnel
.ip_ttl
;
3533 dst_flow
->tp_dst
= src_flow
->tunnel
.tp_dst
;
3534 dst_flow
->tp_src
= src_flow
->tunnel
.tp_src
;
3537 dst_flow
->dl_type
= htons(ETH_TYPE_IPV6
);
3538 if (ipv6_mask_is_any(&dst_flow
->ipv6_src
)
3539 && !ipv6_mask_is_any(&s_ip6
)) {
3540 dst_flow
->ipv6_src
= s_ip6
;
3543 dst_flow
->dl_type
= htons(ETH_TYPE_IP
);
3544 if (dst_flow
->nw_src
== 0 && s_ip
) {
3545 dst_flow
->nw_src
= s_ip
;
3548 dst_flow
->nw_proto
= nw_proto
;
3552 * Populate the 'flow' and 'base_flow' L3 fields to do the post tunnel push
3556 propagate_tunnel_data_to_flow(struct xlate_ctx
*ctx
, struct eth_addr dmac
,
3557 struct eth_addr smac
, struct in6_addr s_ip6
,
3558 ovs_be32 s_ip
, bool is_tnl_ipv6
,
3559 enum ovs_vport_type tnl_type
)
3561 struct flow
*base_flow
, *flow
;
3562 flow
= &ctx
->xin
->flow
;
3563 base_flow
= &ctx
->base_flow
;
3564 uint8_t nw_proto
= 0;
3567 case OVS_VPORT_TYPE_GRE
:
3568 case OVS_VPORT_TYPE_ERSPAN
:
3569 case OVS_VPORT_TYPE_IP6ERSPAN
:
3570 case OVS_VPORT_TYPE_IP6GRE
:
3571 nw_proto
= IPPROTO_GRE
;
3573 case OVS_VPORT_TYPE_VXLAN
:
3574 case OVS_VPORT_TYPE_GENEVE
:
3575 case OVS_VPORT_TYPE_GTPU
:
3576 case OVS_VPORT_TYPE_BAREUDP
:
3577 nw_proto
= IPPROTO_UDP
;
3579 case OVS_VPORT_TYPE_LISP
:
3580 case OVS_VPORT_TYPE_STT
:
3581 case OVS_VPORT_TYPE_UNSPEC
:
3582 case OVS_VPORT_TYPE_NETDEV
:
3583 case OVS_VPORT_TYPE_INTERNAL
:
3584 case __OVS_VPORT_TYPE_MAX
:
3589 * Update base_flow first followed by flow as the dst_flow gets modified
3592 propagate_tunnel_data_to_flow__(base_flow
, flow
, dmac
, smac
, s_ip6
, s_ip
,
3593 is_tnl_ipv6
, nw_proto
);
3594 propagate_tunnel_data_to_flow__(flow
, flow
, dmac
, smac
, s_ip6
, s_ip
,
3595 is_tnl_ipv6
, nw_proto
);
3599 native_tunnel_output(struct xlate_ctx
*ctx
, const struct xport
*xport
,
3600 const struct flow
*flow
, odp_port_t tunnel_odp_port
,
3603 struct netdev_tnl_build_header_params tnl_params
;
3604 struct ovs_action_push_tnl tnl_push_data
;
3605 struct xport
*out_dev
= NULL
;
3606 ovs_be32 s_ip
= 0, d_ip
= 0;
3607 struct in6_addr s_ip6
= in6addr_any
;
3608 struct in6_addr d_ip6
= in6addr_any
;
3609 struct eth_addr smac
;
3610 struct eth_addr dmac
;
3612 char buf_sip6
[INET6_ADDRSTRLEN
];
3613 char buf_dip6
[INET6_ADDRSTRLEN
];
3615 /* Store sFlow data. */
3616 uint32_t sflow_n_outputs
= ctx
->sflow_n_outputs
;
3618 /* Structures to backup Ethernet and IP of base_flow. */
3619 struct flow old_base_flow
;
3620 struct flow old_flow
;
3622 /* Backup flow & base_flow data. */
3623 memcpy(&old_base_flow
, &ctx
->base_flow
, sizeof old_base_flow
);
3624 memcpy(&old_flow
, &ctx
->xin
->flow
, sizeof old_flow
);
3626 if (flow
->tunnel
.ip_src
) {
3627 in6_addr_set_mapped_ipv4(&s_ip6
, flow
->tunnel
.ip_src
);
3630 err
= tnl_route_lookup_flow(ctx
, flow
, &d_ip6
, &s_ip6
, &out_dev
);
3632 xlate_report(ctx
, OFT_WARN
, "native tunnel routing failed");
3636 xlate_report(ctx
, OFT_DETAIL
, "tunneling to %s via %s",
3637 ipv6_string_mapped(buf_dip6
, &d_ip6
),
3638 netdev_get_name(out_dev
->netdev
));
3640 /* Use mac addr of bridge port of the peer. */
3641 err
= netdev_get_etheraddr(out_dev
->netdev
, &smac
);
3643 xlate_report(ctx
, OFT_WARN
,
3644 "tunnel output device lacks Ethernet address");
3648 d_ip
= in6_addr_get_mapped_ipv4(&d_ip6
);
3650 s_ip
= in6_addr_get_mapped_ipv4(&s_ip6
);
3653 err
= tnl_neigh_lookup(out_dev
->xbridge
->name
, &d_ip6
, &dmac
);
3655 xlate_report(ctx
, OFT_DETAIL
,
3656 "neighbor cache miss for %s on bridge %s, "
3657 "sending %s request",
3658 buf_dip6
, out_dev
->xbridge
->name
, d_ip
? "ARP" : "ND");
3660 tnl_send_arp_request(ctx
, out_dev
, smac
, s_ip
, d_ip
);
3662 tnl_send_nd_request(ctx
, out_dev
, smac
, &s_ip6
, &d_ip6
);
3667 if (ctx
->xin
->xcache
) {
3668 struct xc_entry
*entry
;
3670 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_TNL_NEIGH
);
3671 ovs_strlcpy(entry
->tnl_neigh_cache
.br_name
, out_dev
->xbridge
->name
,
3672 sizeof entry
->tnl_neigh_cache
.br_name
);
3673 entry
->tnl_neigh_cache
.d_ipv6
= d_ip6
;
3676 xlate_report(ctx
, OFT_DETAIL
, "tunneling from "ETH_ADDR_FMT
" %s"
3677 " to "ETH_ADDR_FMT
" %s",
3678 ETH_ADDR_ARGS(smac
), ipv6_string_mapped(buf_sip6
, &s_ip6
),
3679 ETH_ADDR_ARGS(dmac
), buf_dip6
);
3681 netdev_init_tnl_build_header_params(&tnl_params
, flow
, &s_ip6
, dmac
, smac
);
3682 err
= tnl_port_build_header(xport
->ofport
, &tnl_push_data
, &tnl_params
);
3686 tnl_push_data
.tnl_port
= tunnel_odp_port
;
3687 tnl_push_data
.out_port
= out_dev
->odp_port
;
3689 /* After tunnel header has been added, MAC and IP data of flow and
3690 * base_flow need to be set properly, since there is not recirculation
3691 * any more when sending packet to tunnel. */
3693 propagate_tunnel_data_to_flow(ctx
, dmac
, smac
, s_ip6
,
3694 s_ip
, tnl_params
.is_ipv6
,
3695 tnl_push_data
.tnl_type
);
3697 size_t clone_ofs
= 0;
3698 size_t push_action_size
;
3700 clone_ofs
= nl_msg_start_nested(ctx
->odp_actions
, OVS_ACTION_ATTR_CLONE
);
3701 odp_put_tnl_push_action(ctx
->odp_actions
, &tnl_push_data
);
3702 push_action_size
= ctx
->odp_actions
->size
;
3705 const struct dpif_flow_stats
*backup_resubmit_stats
;
3706 struct xlate_cache
*backup_xcache
;
3707 struct flow_wildcards
*backup_wc
, wc
;
3708 bool backup_side_effects
;
3709 const struct dp_packet
*backup_packet
;
3711 memset(&wc
, 0 , sizeof wc
);
3712 backup_wc
= ctx
->wc
;
3714 ctx
->xin
->wc
= NULL
;
3715 backup_resubmit_stats
= ctx
->xin
->resubmit_stats
;
3716 backup_xcache
= ctx
->xin
->xcache
;
3717 backup_side_effects
= ctx
->xin
->allow_side_effects
;
3718 backup_packet
= ctx
->xin
->packet
;
3720 ctx
->xin
->resubmit_stats
= NULL
;
3721 ctx
->xin
->xcache
= xlate_cache_new(); /* Use new temporary cache. */
3722 ctx
->xin
->allow_side_effects
= false;
3723 ctx
->xin
->packet
= NULL
;
3725 /* Push the cache entry for the tunnel first. */
3726 struct xc_entry
*entry
;
3727 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_TUNNEL_HEADER
);
3728 entry
->tunnel_hdr
.hdr_size
= tnl_push_data
.header_len
;
3729 entry
->tunnel_hdr
.operation
= ADD
;
3731 patch_port_output(ctx
, xport
, out_dev
);
3733 /* Similar to the stats update in revalidation, the x_cache entries
3734 * are populated by the previous translation are used to update the
3737 if (backup_resubmit_stats
) {
3738 struct dpif_flow_stats stats
= *backup_resubmit_stats
;
3739 xlate_push_stats(ctx
->xin
->xcache
, &stats
, false);
3741 xlate_cache_steal_entries(backup_xcache
, ctx
->xin
->xcache
);
3743 if (ctx
->odp_actions
->size
> push_action_size
) {
3744 nl_msg_end_non_empty_nested(ctx
->odp_actions
, clone_ofs
);
3746 nl_msg_cancel_nested(ctx
->odp_actions
, clone_ofs
);
3749 /* Restore context status. */
3750 ctx
->xin
->resubmit_stats
= backup_resubmit_stats
;
3751 xlate_cache_delete(ctx
->xin
->xcache
);
3752 ctx
->xin
->xcache
= backup_xcache
;
3753 ctx
->xin
->allow_side_effects
= backup_side_effects
;
3754 ctx
->xin
->packet
= backup_packet
;
3755 ctx
->wc
= backup_wc
;
3757 /* In order to maintain accurate stats, use recirc for
3758 * natvie tunneling. */
3759 nl_msg_put_u32(ctx
->odp_actions
, OVS_ACTION_ATTR_RECIRC
, 0);
3760 nl_msg_end_nested(ctx
->odp_actions
, clone_ofs
);
3763 /* Restore the flows after the translation. */
3764 memcpy(&ctx
->xin
->flow
, &old_flow
, sizeof ctx
->xin
->flow
);
3765 memcpy(&ctx
->base_flow
, &old_base_flow
, sizeof ctx
->base_flow
);
3767 /* Restore sFlow data. */
3768 ctx
->sflow_n_outputs
= sflow_n_outputs
;
3774 xlate_commit_actions(struct xlate_ctx
*ctx
)
3776 bool use_masked
= ctx
->xbridge
->support
.masked_set_action
;
3778 ctx
->xout
->slow
|= commit_odp_actions(&ctx
->xin
->flow
, &ctx
->base_flow
,
3779 ctx
->odp_actions
, ctx
->wc
,
3780 use_masked
, ctx
->pending_encap
,
3781 ctx
->pending_decap
, ctx
->encap_data
);
3782 ctx
->pending_encap
= false;
3783 ctx
->pending_decap
= false;
3784 ofpbuf_delete(ctx
->encap_data
);
3785 ctx
->encap_data
= NULL
;
3789 clear_conntrack(struct xlate_ctx
*ctx
)
3791 ctx
->conntracked
= false;
3792 flow_clear_conntrack(&ctx
->xin
->flow
);
3796 xlate_flow_is_protected(const struct xlate_ctx
*ctx
, const struct flow
*flow
, const struct xport
*xport_out
)
3798 const struct xport
*xport_in
;
3804 xport_in
= get_ofp_port(ctx
->xbridge
, flow
->in_port
.ofp_port
);
3806 return (xport_in
&& xport_in
->xbundle
&& xport_out
->xbundle
&&
3807 xport_in
->xbundle
->protected && xport_out
->xbundle
->protected);
3810 /* Function handles when a packet is sent from one bridge to another bridge.
3812 * The bridges are internally connected, either with patch ports or with
3815 * The output action to another bridge causes translation to continue within
3816 * the next bridge. This process can be recursive; the next bridge can
3817 * output yet to another bridge.
3819 * The translated actions from the second bridge onwards are enclosed within
3820 * the clone action, so that any modification to the packet will not be visible
3821 * to the remaining actions of the originating bridge.
3824 patch_port_output(struct xlate_ctx
*ctx
, const struct xport
*in_dev
,
3825 struct xport
*out_dev
)
3827 struct flow
*flow
= &ctx
->xin
->flow
;
3828 struct flow old_flow
= ctx
->xin
->flow
;
3829 struct flow_tnl old_flow_tnl_wc
= ctx
->wc
->masks
.tunnel
;
3830 bool old_conntrack
= ctx
->conntracked
;
3831 bool old_was_mpls
= ctx
->was_mpls
;
3832 ovs_version_t old_version
= ctx
->xin
->tables_version
;
3833 struct ofpbuf old_stack
= ctx
->stack
;
3834 uint8_t new_stack
[1024];
3835 struct ofpbuf old_action_set
= ctx
->action_set
;
3836 struct ovs_list
*old_trace
= ctx
->xin
->trace
;
3837 uint64_t actset_stub
[1024 / 8];
3839 ofpbuf_use_stub(&ctx
->stack
, new_stack
, sizeof new_stack
);
3840 ofpbuf_use_stub(&ctx
->action_set
, actset_stub
, sizeof actset_stub
);
3841 flow
->in_port
.ofp_port
= out_dev
->ofp_port
;
3842 flow
->metadata
= htonll(0);
3843 memset(&flow
->tunnel
, 0, sizeof flow
->tunnel
);
3844 memset(&ctx
->wc
->masks
.tunnel
, 0, sizeof ctx
->wc
->masks
.tunnel
);
3845 flow
->tunnel
.metadata
.tab
=
3846 ofproto_get_tun_tab(&out_dev
->xbridge
->ofproto
->up
);
3847 ctx
->wc
->masks
.tunnel
.metadata
.tab
= flow
->tunnel
.metadata
.tab
;
3848 memset(flow
->regs
, 0, sizeof flow
->regs
);
3849 flow
->actset_output
= OFPP_UNSET
;
3850 clear_conntrack(ctx
);
3851 ctx
->xin
->trace
= xlate_report(ctx
, OFT_BRIDGE
, "bridge(\"%s\")",
3852 out_dev
->xbridge
->name
);
3853 mirror_mask_t old_mirrors
= ctx
->mirrors
;
3854 bool independent_mirrors
= out_dev
->xbridge
!= ctx
->xbridge
;
3855 if (independent_mirrors
) {
3858 ctx
->xbridge
= out_dev
->xbridge
;
3860 /* The bridge is now known so obtain its table version. */
3861 ctx
->xin
->tables_version
3862 = ofproto_dpif_get_tables_version(ctx
->xbridge
->ofproto
);
3864 if (!process_special(ctx
, out_dev
) && may_receive(out_dev
, ctx
)) {
3865 if (xport_stp_forward_state(out_dev
) &&
3866 xport_rstp_forward_state(out_dev
)) {
3867 xlate_table_action(ctx
, flow
->in_port
.ofp_port
, 0, true, true,
3868 false, true, clone_xlate_actions
);
3869 if (!ctx
->freezing
) {
3870 xlate_action_set(ctx
);
3872 if (ctx
->freezing
) {
3873 finish_freezing(ctx
);
3876 /* Forwarding is disabled by STP and RSTP. Let OFPP_NORMAL and
3877 * the learning action look at the packet, then drop it. */
3878 struct flow old_base_flow
= ctx
->base_flow
;
3879 size_t old_size
= ctx
->odp_actions
->size
;
3880 mirror_mask_t old_mirrors2
= ctx
->mirrors
;
3882 xlate_table_action(ctx
, flow
->in_port
.ofp_port
, 0, true, true,
3883 false, true, clone_xlate_actions
);
3884 ctx
->mirrors
= old_mirrors2
;
3885 ctx
->base_flow
= old_base_flow
;
3886 ctx
->odp_actions
->size
= old_size
;
3888 /* Undo changes that may have been done for freezing. */
3889 ctx_cancel_freeze(ctx
);
3893 ctx
->xin
->trace
= old_trace
;
3894 if (independent_mirrors
) {
3895 ctx
->mirrors
= old_mirrors
;
3897 ctx
->xin
->flow
= old_flow
;
3898 ctx
->xbridge
= in_dev
->xbridge
;
3899 ofpbuf_uninit(&ctx
->action_set
);
3900 ctx
->action_set
= old_action_set
;
3901 ofpbuf_uninit(&ctx
->stack
);
3902 ctx
->stack
= old_stack
;
3904 /* Restore calling bridge's lookup version. */
3905 ctx
->xin
->tables_version
= old_version
;
3907 /* Restore to calling bridge tunneling information */
3908 ctx
->wc
->masks
.tunnel
= old_flow_tnl_wc
;
3910 /* The out bridge popping MPLS should have no effect on the original
3912 ctx
->was_mpls
= old_was_mpls
;
3914 /* The out bridge's conntrack execution should have no effect on the
3915 * original bridge. */
3916 ctx
->conntracked
= old_conntrack
;
3918 /* The fact that the out bridge exits (for any reason) does not mean
3919 * that the original bridge should exit. Specifically, if the out
3920 * bridge freezes translation, the original bridge must continue
3921 * processing with the original, not the frozen packet! */
3924 /* Out bridge errors do not propagate back. */
3925 ctx
->error
= XLATE_OK
;
3927 if (ctx
->xin
->resubmit_stats
) {
3928 netdev_vport_inc_tx(in_dev
->netdev
, ctx
->xin
->resubmit_stats
);
3929 netdev_vport_inc_rx(out_dev
->netdev
, ctx
->xin
->resubmit_stats
);
3931 bfd_account_rx(out_dev
->bfd
, ctx
->xin
->resubmit_stats
);
3934 if (ctx
->xin
->xcache
) {
3935 struct xc_entry
*entry
;
3937 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_NETDEV
);
3938 entry
->dev
.tx
= netdev_ref(in_dev
->netdev
);
3939 entry
->dev
.rx
= netdev_ref(out_dev
->netdev
);
3940 entry
->dev
.bfd
= bfd_ref(out_dev
->bfd
);
3945 check_output_prerequisites(struct xlate_ctx
*ctx
,
3946 const struct xport
*xport
,
3950 struct flow_wildcards
*wc
= ctx
->wc
;
3953 xlate_report(ctx
, OFT_WARN
, "Nonexistent output port");
3955 } else if (xport
->config
& OFPUTIL_PC_NO_FWD
) {
3956 xlate_report(ctx
, OFT_DETAIL
, "OFPPC_NO_FWD set, skipping output");
3958 } else if (ctx
->mirror_snaplen
!= 0 && xport
->odp_port
== ODPP_NONE
) {
3959 xlate_report(ctx
, OFT_WARN
,
3960 "Mirror truncate to ODPP_NONE, skipping output");
3962 } else if (xlate_flow_is_protected(ctx
, flow
, xport
)) {
3963 xlate_report(ctx
, OFT_WARN
,
3964 "Flow is between protected ports, skipping output.");
3966 } else if (check_stp
) {
3967 if (is_stp(&ctx
->base_flow
)) {
3968 if (!xport_stp_should_forward_bpdu(xport
) &&
3969 !xport_rstp_should_manage_bpdu(xport
)) {
3970 if (ctx
->xbridge
->stp
!= NULL
) {
3971 xlate_report(ctx
, OFT_WARN
,
3972 "STP not in listening state, "
3973 "skipping bpdu output");
3974 } else if (ctx
->xbridge
->rstp
!= NULL
) {
3975 xlate_report(ctx
, OFT_WARN
,
3976 "RSTP not managing BPDU in this state, "
3977 "skipping bpdu output");
3981 } else if ((xport
->cfm
&& cfm_should_process_flow(xport
->cfm
, flow
, wc
))
3982 || (xport
->bfd
&& bfd_should_process_flow(xport
->bfd
, flow
,
3984 /* Pass; STP should not block link health detection. */
3985 } else if (!xport_stp_forward_state(xport
) ||
3986 !xport_rstp_forward_state(xport
)) {
3987 if (ctx
->xbridge
->stp
!= NULL
) {
3988 xlate_report(ctx
, OFT_WARN
,
3989 "STP not in forwarding state, skipping output");
3990 } else if (ctx
->xbridge
->rstp
!= NULL
) {
3991 xlate_report(ctx
, OFT_WARN
,
3992 "RSTP not in forwarding state, skipping output");
3998 if (xport
->pt_mode
== NETDEV_PT_LEGACY_L2
&&
3999 flow
->packet_type
!= htonl(PT_ETH
)) {
4000 xlate_report(ctx
, OFT_WARN
, "Trying to send non-Ethernet packet "
4001 "through legacy L2 port. Dropping packet.");
4008 /* Function verifies if destination address of received Neighbor Advertisement
4009 * message stored in 'flow' is correct. It should be either FF02::1:FFXX:XXXX
4010 * where XX:XXXX stands for the last 24 bits of 'ipv6_addr' or it should match
4013 is_nd_dst_correct(const struct flow
*flow
, const struct in6_addr
*ipv6_addr
)
4015 const uint8_t *flow_ipv6_addr
= (uint8_t *) &flow
->ipv6_dst
;
4016 const uint8_t *addr
= (uint8_t *) ipv6_addr
;
4018 return (IN6_IS_ADDR_MC_LINKLOCAL(&flow
->ipv6_dst
) &&
4019 flow_ipv6_addr
[11] == 0x01 &&
4020 flow_ipv6_addr
[12] == 0xff &&
4021 flow_ipv6_addr
[13] == addr
[13] &&
4022 flow_ipv6_addr
[14] == addr
[14] &&
4023 flow_ipv6_addr
[15] == addr
[15]) ||
4024 IN6_ARE_ADDR_EQUAL(&flow
->ipv6_dst
, ipv6_addr
);
4028 is_neighbor_reply_matched(const struct flow
*flow
, struct in6_addr
*ip_addr
)
4030 return ((IN6_IS_ADDR_V4MAPPED(ip_addr
) &&
4031 flow
->dl_type
== htons(ETH_TYPE_ARP
) &&
4032 in6_addr_get_mapped_ipv4(ip_addr
) == flow
->nw_dst
) ||
4033 (!IN6_IS_ADDR_V4MAPPED(ip_addr
) &&
4034 is_nd_dst_correct(flow
, ip_addr
)));
4037 /* Function verifies if the ARP reply or Neighbor Advertisement represented by
4038 * 'flow' addresses the 'xbridge' of 'ctx'. Returns true if the ARP TA or
4039 * neighbor discovery destination is in the list of configured IP addresses of
4040 * the bridge. Otherwise, it returns false. */
4042 is_neighbor_reply_correct(const struct xlate_ctx
*ctx
, const struct flow
*flow
)
4046 struct xbridge_addr
*xbridge_addr
= xbridge_addr_ref(ctx
->xbridge
->addr
);
4048 /* Verify if 'nw_dst' of ARP or 'ipv6_dst' of ICMPV6 is in the list. */
4049 for (i
= 0; xbridge_addr
&& i
< xbridge_addr
->n_addr
; i
++) {
4050 struct in6_addr
*ip_addr
= &xbridge_addr
->addr
[i
];
4051 if (is_neighbor_reply_matched(flow
, ip_addr
)) {
4052 /* Found a match. */
4058 xbridge_addr_unref(xbridge_addr
);
4060 /* If not found in bridge's IPs, search in its ports. */
4062 struct in6_addr
*ip_addr
, *mask
;
4066 HMAP_FOR_EACH (port
, ofp_node
, &ctx
->xbridge
->xports
) {
4067 error
= netdev_get_addr_list(port
->netdev
, &ip_addr
,
4070 ret
= is_neighbor_reply_matched(flow
, ip_addr
);
4074 /* Found a match. */
4084 terminate_native_tunnel(struct xlate_ctx
*ctx
, struct flow
*flow
,
4085 struct flow_wildcards
*wc
, odp_port_t
*tnl_port
)
4087 *tnl_port
= ODPP_NONE
;
4089 /* XXX: Write better Filter for tunnel port. We can use in_port
4090 * in tunnel-port flow to avoid these checks completely. */
4091 if (ovs_native_tunneling_is_on(ctx
->xbridge
->ofproto
)) {
4092 *tnl_port
= tnl_port_map_lookup(flow
, wc
);
4094 /* If no tunnel port was found and it's about an ARP or ICMPv6 packet,
4095 * do tunnel neighbor snooping. */
4096 if (*tnl_port
== ODPP_NONE
&&
4097 (flow
->dl_type
== htons(ETH_TYPE_ARP
) ||
4098 flow
->nw_proto
== IPPROTO_ICMPV6
) &&
4099 is_neighbor_reply_correct(ctx
, flow
)) {
4100 tnl_neigh_snoop(flow
, wc
, ctx
->xbridge
->name
);
4104 return *tnl_port
!= ODPP_NONE
;
4108 compose_output_action__(struct xlate_ctx
*ctx
, ofp_port_t ofp_port
,
4109 const struct xlate_bond_recirc
*xr
, bool check_stp
,
4110 bool is_last_action OVS_UNUSED
, bool truncate
)
4112 const struct xport
*xport
= get_ofp_port(ctx
->xbridge
, ofp_port
);
4113 struct flow_wildcards
*wc
= ctx
->wc
;
4114 struct flow
*flow
= &ctx
->xin
->flow
;
4115 struct flow_tnl flow_tnl
;
4116 union flow_vlan_hdr flow_vlans
[FLOW_MAX_VLAN_HEADERS
];
4117 uint8_t flow_nw_tos
;
4118 odp_port_t out_port
, odp_port
, odp_tnl_port
;
4119 bool is_native_tunnel
= false;
4121 struct eth_addr flow_dl_dst
= flow
->dl_dst
;
4122 struct eth_addr flow_dl_src
= flow
->dl_src
;
4123 ovs_be32 flow_packet_type
= flow
->packet_type
;
4124 ovs_be16 flow_dl_type
= flow
->dl_type
;
4126 /* If 'struct flow' gets additional metadata, we'll need to zero it out
4127 * before traversing a patch port. */
4128 BUILD_ASSERT_DECL(FLOW_WC_SEQ
== 42);
4129 memset(&flow_tnl
, 0, sizeof flow_tnl
);
4131 if (!check_output_prerequisites(ctx
, xport
, flow
, check_stp
)) {
4135 if (flow
->packet_type
== htonl(PT_ETH
)) {
4136 /* Strip Ethernet header for legacy L3 port. */
4137 if (xport
->pt_mode
== NETDEV_PT_LEGACY_L3
) {
4138 flow
->packet_type
= PACKET_TYPE_BE(OFPHTN_ETHERTYPE
,
4139 ntohs(flow
->dl_type
));
4145 xlate_report_error(ctx
, "Cannot truncate output to patch port");
4147 patch_port_output(ctx
, xport
, xport
->peer
);
4151 memcpy(flow_vlans
, flow
->vlans
, sizeof flow_vlans
);
4152 flow_nw_tos
= flow
->nw_tos
;
4154 if (count_skb_priorities(xport
)) {
4155 memset(&wc
->masks
.skb_priority
, 0xff, sizeof wc
->masks
.skb_priority
);
4156 if (dscp_from_skb_priority(xport
, flow
->skb_priority
, &dscp
)) {
4157 wc
->masks
.nw_tos
|= IP_DSCP_MASK
;
4158 flow
->nw_tos
&= ~IP_DSCP_MASK
;
4159 flow
->nw_tos
|= dscp
;
4163 if (xport
->is_tunnel
) {
4164 struct in6_addr dst
;
4165 /* Save tunnel metadata so that changes made due to
4166 * the Logical (tunnel) Port are not visible for any further
4167 * matches, while explicit set actions on tunnel metadata are.
4169 flow_tnl
= flow
->tunnel
;
4170 odp_port
= tnl_port_send(xport
->ofport
, flow
, ctx
->wc
);
4171 if (odp_port
== ODPP_NONE
) {
4172 xlate_report(ctx
, OFT_WARN
, "Tunneling decided against output");
4173 goto out
; /* restore flow_nw_tos */
4175 dst
= flow_tnl_dst(&flow
->tunnel
);
4176 if (ipv6_addr_equals(&dst
, &ctx
->orig_tunnel_ipv6_dst
)) {
4177 xlate_report(ctx
, OFT_WARN
, "Not tunneling to our own address");
4178 goto out
; /* restore flow_nw_tos */
4180 if (ctx
->xin
->resubmit_stats
) {
4181 netdev_vport_inc_tx(xport
->netdev
, ctx
->xin
->resubmit_stats
);
4183 if (ctx
->xin
->xcache
) {
4184 struct xc_entry
*entry
;
4186 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_NETDEV
);
4187 entry
->dev
.tx
= netdev_ref(xport
->netdev
);
4189 out_port
= odp_port
;
4190 if (ovs_native_tunneling_is_on(ctx
->xbridge
->ofproto
)) {
4191 xlate_report(ctx
, OFT_DETAIL
, "output to native tunnel");
4192 is_native_tunnel
= true;
4194 const char *tnl_type
;
4196 xlate_report(ctx
, OFT_DETAIL
, "output to kernel tunnel");
4197 tnl_type
= tnl_port_get_type(xport
->ofport
);
4198 commit_odp_tunnel_action(flow
, &ctx
->base_flow
,
4199 ctx
->odp_actions
, tnl_type
);
4200 flow
->tunnel
= flow_tnl
; /* Restore tunnel metadata */
4203 odp_port
= xport
->odp_port
;
4204 out_port
= odp_port
;
4207 if (out_port
!= ODPP_NONE
) {
4208 /* Commit accumulated flow updates before output. */
4209 xlate_commit_actions(ctx
);
4211 if (xr
&& bond_use_lb_output_action(xport
->xbundle
->bond
)) {
4213 * If bond mode is balance-tcp and optimize balance tcp is enabled
4214 * then use the hash directly for member selection and avoid
4217 * Currently support for netdev datapath only.
4219 nl_msg_put_u32(ctx
->odp_actions
, OVS_ACTION_ATTR_LB_OUTPUT
,
4222 /* Recirculate the packet. */
4223 struct ovs_action_hash
*act_hash
;
4226 enum ovs_hash_alg hash_alg
= xr
->hash_alg
;
4227 if (hash_alg
> ctx
->xbridge
->support
.max_hash_alg
) {
4228 /* Algorithm supported by all datapaths. */
4229 hash_alg
= OVS_HASH_ALG_L4
;
4231 act_hash
= nl_msg_put_unspec_uninit(ctx
->odp_actions
,
4232 OVS_ACTION_ATTR_HASH
,
4234 act_hash
->hash_alg
= hash_alg
;
4235 act_hash
->hash_basis
= xr
->hash_basis
;
4237 /* Recirc action. */
4238 nl_msg_put_u32(ctx
->odp_actions
, OVS_ACTION_ATTR_RECIRC
,
4240 } else if (is_native_tunnel
) {
4241 /* Output to native tunnel port. */
4242 native_tunnel_output(ctx
, xport
, flow
, odp_port
, truncate
);
4243 flow
->tunnel
= flow_tnl
; /* Restore tunnel metadata */
4245 } else if (terminate_native_tunnel(ctx
, flow
, wc
,
4247 /* Intercept packet to be received on native tunnel port. */
4248 nl_msg_put_odp_port(ctx
->odp_actions
, OVS_ACTION_ATTR_TUNNEL_POP
,
4252 /* Tunnel push-pop action is not compatible with
4254 compose_ipfix_action(ctx
, out_port
);
4256 /* Handle truncation of the mirrored packet. */
4257 if (ctx
->mirror_snaplen
> 0 &&
4258 ctx
->mirror_snaplen
< UINT16_MAX
) {
4259 struct ovs_action_trunc
*trunc
;
4261 trunc
= nl_msg_put_unspec_uninit(ctx
->odp_actions
,
4262 OVS_ACTION_ATTR_TRUNC
,
4264 trunc
->max_len
= ctx
->mirror_snaplen
;
4265 if (!ctx
->xbridge
->support
.trunc
) {
4266 ctx
->xout
->slow
|= SLOW_ACTION
;
4270 nl_msg_put_odp_port(ctx
->odp_actions
,
4271 OVS_ACTION_ATTR_OUTPUT
,
4275 ctx
->sflow_odp_port
= odp_port
;
4276 ctx
->sflow_n_outputs
++;
4277 ctx
->nf_output_iface
= ofp_port
;
4280 if (mbridge_has_mirrors(ctx
->xbridge
->mbridge
) && xport
->xbundle
) {
4281 mirror_packet(ctx
, xport
->xbundle
,
4282 xbundle_mirror_dst(xport
->xbundle
->xbridge
,
4288 memcpy(flow
->vlans
, flow_vlans
, sizeof flow
->vlans
);
4289 flow
->nw_tos
= flow_nw_tos
;
4290 flow
->dl_dst
= flow_dl_dst
;
4291 flow
->dl_src
= flow_dl_src
;
4292 flow
->packet_type
= flow_packet_type
;
4293 flow
->dl_type
= flow_dl_type
;
4297 compose_output_action(struct xlate_ctx
*ctx
, ofp_port_t ofp_port
,
4298 const struct xlate_bond_recirc
*xr
,
4299 bool is_last_action
, bool truncate
)
4301 compose_output_action__(ctx
, ofp_port
, xr
, true,
4302 is_last_action
, truncate
);
4306 xlate_recursively(struct xlate_ctx
*ctx
, struct rule_dpif
*rule
,
4307 bool deepens
, bool is_last_action
,
4308 xlate_actions_handler
*actions_xlator
)
4310 struct rule_dpif
*old_rule
= ctx
->rule
;
4311 ovs_be64 old_cookie
= ctx
->rule_cookie
;
4312 const struct rule_actions
*actions
;
4314 if (ctx
->xin
->resubmit_stats
) {
4315 rule_dpif_credit_stats(rule
, ctx
->xin
->resubmit_stats
, false);
4320 ctx
->depth
+= deepens
;
4322 ctx
->rule_cookie
= rule
->up
.flow_cookie
;
4323 actions
= rule_get_actions(&rule
->up
);
4324 actions_xlator(actions
->ofpacts
, actions
->ofpacts_len
, ctx
,
4325 is_last_action
, false);
4326 ctx
->rule_cookie
= old_cookie
;
4327 ctx
->rule
= old_rule
;
4328 ctx
->depth
-= deepens
;
4332 xlate_resubmit_resource_check(struct xlate_ctx
*ctx
)
4334 if (ctx
->depth
>= MAX_DEPTH
) {
4335 xlate_report_error(ctx
, "over max translation depth %d", MAX_DEPTH
);
4336 ctx
->error
= XLATE_RECURSION_TOO_DEEP
;
4337 } else if (ctx
->resubmits
>= MAX_RESUBMITS
) {
4338 xlate_report_error(ctx
, "over %d resubmit actions", MAX_RESUBMITS
);
4339 ctx
->error
= XLATE_TOO_MANY_RESUBMITS
;
4340 } else if (ctx
->odp_actions
->size
> UINT16_MAX
) {
4341 xlate_report_error(ctx
, "resubmits yielded over 64 kB of actions");
4342 /* NOT an error, as we'll be slow-pathing the flow in this case? */
4343 ctx
->exit
= true; /* XXX: translation still terminated! */
4344 } else if (ctx
->stack
.size
>= 65536) {
4345 xlate_report_error(ctx
, "resubmits yielded over 64 kB of stack");
4346 ctx
->error
= XLATE_STACK_TOO_DEEP
;
4355 tuple_swap_flow(struct flow
*flow
, bool ipv4
)
4357 uint8_t nw_proto
= flow
->nw_proto
;
4358 flow
->nw_proto
= flow
->ct_nw_proto
;
4359 flow
->ct_nw_proto
= nw_proto
;
4362 ovs_be32 nw_src
= flow
->nw_src
;
4363 flow
->nw_src
= flow
->ct_nw_src
;
4364 flow
->ct_nw_src
= nw_src
;
4366 ovs_be32 nw_dst
= flow
->nw_dst
;
4367 flow
->nw_dst
= flow
->ct_nw_dst
;
4368 flow
->ct_nw_dst
= nw_dst
;
4370 struct in6_addr ipv6_src
= flow
->ipv6_src
;
4371 flow
->ipv6_src
= flow
->ct_ipv6_src
;
4372 flow
->ct_ipv6_src
= ipv6_src
;
4374 struct in6_addr ipv6_dst
= flow
->ipv6_dst
;
4375 flow
->ipv6_dst
= flow
->ct_ipv6_dst
;
4376 flow
->ct_ipv6_dst
= ipv6_dst
;
4379 ovs_be16 tp_src
= flow
->tp_src
;
4380 flow
->tp_src
= flow
->ct_tp_src
;
4381 flow
->ct_tp_src
= tp_src
;
4383 ovs_be16 tp_dst
= flow
->tp_dst
;
4384 flow
->tp_dst
= flow
->ct_tp_dst
;
4385 flow
->ct_tp_dst
= tp_dst
;
4389 tuple_swap(struct flow
*flow
, struct flow_wildcards
*wc
)
4391 bool ipv4
= (flow
->dl_type
== htons(ETH_TYPE_IP
));
4393 tuple_swap_flow(flow
, ipv4
);
4394 tuple_swap_flow(&wc
->masks
, ipv4
);
4398 xlate_table_action(struct xlate_ctx
*ctx
, ofp_port_t in_port
, uint8_t table_id
,
4399 bool may_packet_in
, bool honor_table_miss
,
4400 bool with_ct_orig
, bool is_last_action
,
4401 xlate_actions_handler
*xlator
)
4403 /* Check if we need to recirculate before matching in a table. */
4404 if (ctx
->was_mpls
) {
4405 ctx_trigger_freeze(ctx
);
4408 if (xlate_resubmit_resource_check(ctx
)) {
4409 uint8_t old_table_id
= ctx
->table_id
;
4410 struct rule_dpif
*rule
;
4412 ctx
->table_id
= table_id
;
4414 /* Swap packet fields with CT 5-tuple if requested. */
4416 /* Do not swap if there is no CT tuple, or if key is not IP. */
4417 if (ctx
->xin
->flow
.ct_nw_proto
== 0 ||
4418 !is_ip_any(&ctx
->xin
->flow
)) {
4419 xlate_report_error(ctx
,
4420 "resubmit(ct) with non-tracked or non-IP packet!");
4421 ctx
->table_id
= old_table_id
;
4424 tuple_swap(&ctx
->xin
->flow
, ctx
->wc
);
4426 rule
= rule_dpif_lookup_from_table(ctx
->xbridge
->ofproto
,
4427 ctx
->xin
->tables_version
,
4428 &ctx
->xin
->flow
, ctx
->wc
,
4429 ctx
->xin
->resubmit_stats
,
4430 &ctx
->table_id
, in_port
,
4431 may_packet_in
, honor_table_miss
,
4435 tuple_swap(&ctx
->xin
->flow
, ctx
->wc
);
4439 /* Fill in the cache entry here instead of xlate_recursively
4440 * to make the reference counting more explicit. We take a
4441 * reference in the lookups above if we are going to cache the
4443 if (ctx
->xin
->xcache
) {
4444 struct xc_entry
*entry
;
4446 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_RULE
);
4448 ofproto_rule_ref(&rule
->up
);
4451 struct ovs_list
*old_trace
= ctx
->xin
->trace
;
4452 xlate_report_table(ctx
, rule
, table_id
);
4453 xlate_recursively(ctx
, rule
, table_id
<= old_table_id
,
4454 is_last_action
, xlator
);
4455 ctx
->xin
->trace
= old_trace
;
4458 ctx
->table_id
= old_table_id
;
4463 /* Consumes the group reference, which is only taken if xcache exists. */
4465 xlate_group_stats(struct xlate_ctx
*ctx
, struct group_dpif
*group
,
4466 struct ofputil_bucket
*bucket
)
4468 if (ctx
->xin
->resubmit_stats
) {
4469 group_dpif_credit_stats(group
, bucket
, ctx
->xin
->resubmit_stats
);
4471 if (ctx
->xin
->xcache
) {
4472 struct xc_entry
*entry
;
4474 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_GROUP
);
4475 entry
->group
.group
= group
;
4476 entry
->group
.bucket
= bucket
;
4481 xlate_group_bucket(struct xlate_ctx
*ctx
, struct ofputil_bucket
*bucket
,
4482 bool is_last_action
)
4484 struct ovs_list
*old_trace
= ctx
->xin
->trace
;
4485 if (OVS_UNLIKELY(ctx
->xin
->trace
)) {
4486 char *s
= xasprintf("bucket %"PRIu32
, bucket
->bucket_id
);
4487 ctx
->xin
->trace
= &oftrace_report(ctx
->xin
->trace
, OFT_BUCKET
,
4492 uint64_t action_list_stub
[1024 / 8];
4493 struct ofpbuf action_list
= OFPBUF_STUB_INITIALIZER(action_list_stub
);
4494 struct ofpbuf action_set
= ofpbuf_const_initializer(bucket
->ofpacts
,
4495 bucket
->ofpacts_len
);
4496 struct flow old_flow
= ctx
->xin
->flow
;
4497 bool old_was_mpls
= ctx
->was_mpls
;
4499 ofpacts_execute_action_set(&action_list
, &action_set
);
4501 do_xlate_actions(action_list
.data
, action_list
.size
, ctx
, is_last_action
,
4505 ofpbuf_uninit(&action_list
);
4507 /* Check if need to freeze. */
4508 if (ctx
->freezing
) {
4509 finish_freezing(ctx
);
4512 /* Roll back flow to previous state.
4513 * This is equivalent to cloning the packet for each bucket.
4515 * As a side effect any subsequently applied actions will
4516 * also effectively be applied to a clone of the packet taken
4517 * just before applying the all or indirect group.
4519 * Note that group buckets are action sets, hence they cannot modify the
4520 * main action set. Also any stack actions are ignored when executing an
4521 * action set, so group buckets cannot directly change the stack either.
4522 * However, we do allow resubmit actions in group buckets, which could
4523 * recursively execute actions that do modify the action set or change the
4524 * stack. The controller must be careful about what it does to the
4525 * action_set and stack in the tables resubmitted to from group buckets. */
4526 ctx
->xin
->flow
= old_flow
;
4528 /* The group bucket popping MPLS should have no effect after bucket
4530 ctx
->was_mpls
= old_was_mpls
;
4532 /* The fact that the group bucket exits (for any reason) does not mean that
4533 * the translation after the group action should exit. Specifically, if
4534 * the group bucket freezes translation, the actions after the group action
4535 * must continue processing with the original, not the frozen packet! */
4538 /* Context error in a bucket should not impact processing of other buckets
4539 * or actions. This is similar to cloning a packet for group buckets.
4540 * There is no need to restore the error back to old value due to the fact
4541 * that we actually processed group action which can happen only when there
4542 * is no previous context error.
4544 * Exception to above is errors which are system limits to protect
4545 * translation from running too long or occupy too much space. These errors
4546 * should not be masked. XLATE_RECURSION_TOO_DEEP, XLATE_TOO_MANY_RESUBMITS
4547 * and XLATE_STACK_TOO_DEEP fall in this category. */
4548 if (ctx
->error
== XLATE_TOO_MANY_MPLS_LABELS
||
4549 ctx
->error
== XLATE_UNSUPPORTED_PACKET_TYPE
) {
4550 /* reset the error and continue processing other buckets */
4551 ctx
->error
= XLATE_OK
;
4554 ctx
->xin
->trace
= old_trace
;
4557 static struct ofputil_bucket
*
4558 pick_ff_group(struct xlate_ctx
*ctx
, struct group_dpif
*group
)
4560 return group_first_live_bucket(ctx
, group
, 0);
4563 static struct ofputil_bucket
*
4564 pick_default_select_group(struct xlate_ctx
*ctx
, struct group_dpif
*group
)
4566 flow_mask_hash_fields(&ctx
->xin
->flow
, ctx
->wc
,
4567 NX_HASH_FIELDS_SYMMETRIC_L4
);
4568 return group_best_live_bucket(ctx
, group
,
4569 flow_hash_symmetric_l4(&ctx
->xin
->flow
, 0));
4572 static struct ofputil_bucket
*
4573 pick_hash_fields_select_group(struct xlate_ctx
*ctx
, struct group_dpif
*group
)
4575 const struct field_array
*fields
= &group
->up
.props
.fields
;
4576 const uint8_t *mask_values
= fields
->values
;
4577 uint32_t basis
= hash_uint64(group
->up
.props
.selection_method_param
);
4580 BITMAP_FOR_EACH_1 (i
, MFF_N_IDS
, fields
->used
.bm
) {
4581 const struct mf_field
*mf
= mf_from_id(i
);
4583 /* Skip fields for which prerequisites are not met. */
4584 if (!mf_are_prereqs_ok(mf
, &ctx
->xin
->flow
, ctx
->wc
)) {
4585 /* Skip the mask bytes for this field. */
4586 mask_values
+= mf
->n_bytes
;
4590 union mf_value value
;
4591 union mf_value mask
;
4593 mf_get_value(mf
, &ctx
->xin
->flow
, &value
);
4594 /* Mask the value. */
4595 for (int j
= 0; j
< mf
->n_bytes
; j
++) {
4596 mask
.b
[j
] = *mask_values
++;
4597 value
.b
[j
] &= mask
.b
[j
];
4599 basis
= hash_bytes(&value
, mf
->n_bytes
, basis
);
4601 /* For tunnels, hash in whether the field is present. */
4602 if (mf_is_tun_metadata(mf
)) {
4603 basis
= hash_boolean(mf_is_set(mf
, &ctx
->xin
->flow
), basis
);
4606 mf_mask_field_masked(mf
, &mask
, ctx
->wc
);
4609 return group_best_live_bucket(ctx
, group
, basis
);
4612 static struct ofputil_bucket
*
4613 pick_dp_hash_select_group(struct xlate_ctx
*ctx
, struct group_dpif
*group
)
4615 uint32_t dp_hash
= ctx
->xin
->flow
.dp_hash
;
4617 /* dp_hash value 0 is special since it means that the dp_hash has not been
4618 * computed, as all computed dp_hash values are non-zero. Therefore
4619 * compare to zero can be used to decide if the dp_hash value is valid
4620 * without masking the dp_hash field. */
4622 enum ovs_hash_alg hash_alg
= group
->hash_alg
;
4623 if (hash_alg
> ctx
->xbridge
->support
.max_hash_alg
) {
4624 /* Algorithm supported by all datapaths. */
4625 hash_alg
= OVS_HASH_ALG_L4
;
4627 ctx_trigger_recirculate_with_hash(ctx
, hash_alg
, group
->hash_basis
);
4630 uint32_t hash_mask
= group
->hash_mask
;
4631 ctx
->wc
->masks
.dp_hash
|= hash_mask
;
4633 /* Starting from the original masked dp_hash value iterate over the
4634 * hash mapping table to find the first live bucket. As the buckets
4635 * are quasi-randomly spread over the hash values, this maintains
4636 * a distribution according to bucket weights even when some buckets
4638 for (int i
= 0; i
<= hash_mask
; i
++) {
4639 struct ofputil_bucket
*b
=
4640 group
->hash_map
[(dp_hash
+ i
) & hash_mask
];
4641 if (bucket_is_alive(ctx
, b
, 0)) {
4650 static struct ofputil_bucket
*
4651 pick_select_group(struct xlate_ctx
*ctx
, struct group_dpif
*group
)
4653 /* Select groups may access flow keys beyond L2 in order to
4654 * select a bucket. Recirculate as appropriate to make this possible.
4656 if (ctx
->was_mpls
) {
4657 ctx_trigger_freeze(ctx
);
4661 switch (group
->selection_method
) {
4662 case SEL_METHOD_DEFAULT
:
4663 return pick_default_select_group(ctx
, group
);
4665 case SEL_METHOD_HASH
:
4666 return pick_hash_fields_select_group(ctx
, group
);
4668 case SEL_METHOD_DP_HASH
:
4669 return pick_dp_hash_select_group(ctx
, group
);
4672 /* Parsing of groups ensures this never happens */
4680 xlate_group_action__(struct xlate_ctx
*ctx
, struct group_dpif
*group
,
4681 bool is_last_action
)
4683 if (group
->up
.type
== OFPGT11_ALL
|| group
->up
.type
== OFPGT11_INDIRECT
) {
4684 struct ovs_list
*last_bucket
= group
->up
.buckets
.prev
;
4685 struct ofputil_bucket
*bucket
;
4686 LIST_FOR_EACH (bucket
, list_node
, &group
->up
.buckets
) {
4687 bool is_last_bucket
= &bucket
->list_node
== last_bucket
;
4688 xlate_group_bucket(ctx
, bucket
, is_last_action
&& is_last_bucket
);
4690 xlate_group_stats(ctx
, group
, NULL
);
4692 struct ofputil_bucket
*bucket
;
4693 if (group
->up
.type
== OFPGT11_SELECT
) {
4694 bucket
= pick_select_group(ctx
, group
);
4695 } else if (group
->up
.type
== OFPGT11_FF
) {
4696 bucket
= pick_ff_group(ctx
, group
);
4702 xlate_report(ctx
, OFT_DETAIL
, "using bucket %"PRIu32
,
4704 xlate_group_bucket(ctx
, bucket
, is_last_action
);
4705 xlate_group_stats(ctx
, group
, bucket
);
4707 xlate_report(ctx
, OFT_DETAIL
, "no live bucket");
4708 if (ctx
->xin
->xcache
) {
4709 ofproto_group_unref(&group
->up
);
4716 xlate_group_action(struct xlate_ctx
*ctx
, uint32_t group_id
,
4717 bool is_last_action
)
4719 if (xlate_resubmit_resource_check(ctx
)) {
4720 struct group_dpif
*group
;
4722 /* Take ref only if xcache exists. */
4723 group
= group_dpif_lookup(ctx
->xbridge
->ofproto
, group_id
,
4724 ctx
->xin
->tables_version
, ctx
->xin
->xcache
);
4726 /* XXX: Should set ctx->error ? */
4727 xlate_report(ctx
, OFT_WARN
, "output to nonexistent group %"PRIu32
,
4731 xlate_group_action__(ctx
, group
, is_last_action
);
4738 xlate_ofpact_resubmit(struct xlate_ctx
*ctx
,
4739 const struct ofpact_resubmit
*resubmit
,
4740 bool is_last_action
)
4744 bool may_packet_in
= false;
4745 bool honor_table_miss
= false;
4747 if (ctx
->rule
&& rule_dpif_is_internal(ctx
->rule
)) {
4748 /* Still allow missed packets to be sent to the controller
4749 * if resubmitting from an internal table. */
4750 may_packet_in
= true;
4751 honor_table_miss
= true;
4754 in_port
= resubmit
->in_port
;
4755 if (in_port
== OFPP_IN_PORT
) {
4756 in_port
= ctx
->xin
->flow
.in_port
.ofp_port
;
4759 table_id
= resubmit
->table_id
;
4760 if (table_id
== 255) {
4761 table_id
= ctx
->table_id
;
4764 xlate_table_action(ctx
, in_port
, table_id
, may_packet_in
,
4765 honor_table_miss
, resubmit
->with_ct_orig
,
4766 is_last_action
, do_xlate_actions
);
4770 flood_packet_to_port(struct xlate_ctx
*ctx
, const struct xport
*xport
,
4771 bool all
, bool is_last_action
)
4778 compose_output_action__(ctx
, xport
->ofp_port
, NULL
, false,
4779 is_last_action
, false);
4781 compose_output_action(ctx
, xport
->ofp_port
, NULL
, is_last_action
,
4787 flood_packets(struct xlate_ctx
*ctx
, bool all
, bool is_last_action
)
4789 const struct xport
*xport
, *last
= NULL
;
4791 /* Use 'last' the keep track of the last output port. */
4792 HMAP_FOR_EACH (xport
, ofp_node
, &ctx
->xbridge
->xports
) {
4793 if (xport
->ofp_port
== ctx
->xin
->flow
.in_port
.ofp_port
) {
4797 if (all
|| !(xport
->config
& OFPUTIL_PC_NO_FLOOD
)) {
4798 /* 'last' is not the last port, send a packet out, and
4800 flood_packet_to_port(ctx
, last
, all
, false);
4805 /* Send the packet to the 'last' port. */
4806 flood_packet_to_port(ctx
, last
, all
, is_last_action
);
4807 ctx
->nf_output_iface
= NF_OUT_FLOOD
;
4811 put_controller_user_action(struct xlate_ctx
*ctx
,
4812 bool dont_send
, bool continuation
,
4813 uint32_t recirc_id
, int len
,
4814 enum ofp_packet_in_reason reason
,
4815 uint16_t controller_id
)
4817 struct user_action_cookie cookie
;
4819 memset(&cookie
, 0, sizeof cookie
);
4820 cookie
.type
= USER_ACTION_COOKIE_CONTROLLER
;
4821 cookie
.ofp_in_port
= OFPP_NONE
,
4822 cookie
.ofproto_uuid
= ctx
->xbridge
->ofproto
->uuid
;
4823 cookie
.controller
.dont_send
= dont_send
;
4824 cookie
.controller
.continuation
= continuation
;
4825 cookie
.controller
.reason
= reason
;
4826 cookie
.controller
.recirc_id
= recirc_id
;
4827 put_32aligned_be64(&cookie
.controller
.rule_cookie
, ctx
->rule_cookie
);
4828 cookie
.controller
.controller_id
= controller_id
;
4829 cookie
.controller
.max_len
= len
;
4831 odp_port_t odp_port
= ofp_port_to_odp_port(ctx
->xbridge
,
4832 ctx
->xin
->flow
.in_port
.ofp_port
);
4833 uint32_t pid
= dpif_port_get_pid(ctx
->xbridge
->dpif
, odp_port
);
4834 odp_put_userspace_action(pid
, &cookie
, sizeof cookie
, ODPP_NONE
,
4835 false, ctx
->odp_actions
, NULL
);
4839 xlate_controller_action(struct xlate_ctx
*ctx
, int len
,
4840 enum ofp_packet_in_reason reason
,
4841 uint16_t controller_id
,
4842 uint32_t provider_meter_id
,
4843 const uint8_t *userdata
, size_t userdata_len
)
4845 xlate_commit_actions(ctx
);
4847 /* A packet sent by an action in a table-miss rule is considered an
4848 * explicit table miss. OpenFlow before 1.3 doesn't have that concept so
4849 * it will get translated back to OFPR_ACTION for those versions. */
4850 if (reason
== OFPR_ACTION
4851 && ctx
->rule
&& rule_is_table_miss(&ctx
->rule
->up
)) {
4852 reason
= OFPR_EXPLICIT_MISS
;
4855 struct frozen_state state
= {
4856 .table_id
= ctx
->table_id
,
4857 .ofproto_uuid
= ctx
->xbridge
->ofproto
->uuid
,
4858 .stack
= ctx
->stack
.data
,
4859 .stack_size
= ctx
->stack
.size
,
4860 .mirrors
= ctx
->mirrors
,
4861 .conntracked
= ctx
->conntracked
,
4862 .was_mpls
= ctx
->was_mpls
,
4866 .action_set_len
= 0,
4867 .userdata
= CONST_CAST(uint8_t *, userdata
),
4868 .userdata_len
= userdata_len
,
4870 frozen_metadata_from_flow(&state
.metadata
, &ctx
->xin
->flow
);
4872 uint32_t recirc_id
= recirc_alloc_id_ctx(&state
);
4874 xlate_report_error(ctx
, "Failed to allocate recirculation id");
4875 ctx
->error
= XLATE_NO_RECIRCULATION_CONTEXT
;
4878 recirc_refs_add(&ctx
->xout
->recircs
, recirc_id
);
4880 /* If the controller action didn't request a meter (indicated by a
4881 * 'meter_id' argument other than NX_CTLR_NO_METER), see if one was
4882 * configured through the "controller" virtual meter.
4884 * Internally, ovs-vswitchd uses UINT32_MAX to indicate no meter is
4887 if (provider_meter_id
== UINT32_MAX
) {
4888 meter_id
= ctx
->xbridge
->ofproto
->up
.controller_meter_id
;
4890 meter_id
= provider_meter_id
;
4895 if (meter_id
!= UINT32_MAX
) {
4896 /* If controller meter is configured, generate clone(meter, userspace)
4898 offset
= nl_msg_start_nested(ctx
->odp_actions
, OVS_ACTION_ATTR_SAMPLE
);
4899 nl_msg_put_u32(ctx
->odp_actions
, OVS_SAMPLE_ATTR_PROBABILITY
,
4901 ac_offset
= nl_msg_start_nested(ctx
->odp_actions
,
4902 OVS_SAMPLE_ATTR_ACTIONS
);
4903 nl_msg_put_u32(ctx
->odp_actions
, OVS_ACTION_ATTR_METER
, meter_id
);
4906 /* Generate the datapath flows even if we don't send the packet-in
4907 * so that debugging more closely represents normal state. */
4908 bool dont_send
= false;
4909 if (!ctx
->xin
->allow_side_effects
&& !ctx
->xin
->xcache
) {
4912 put_controller_user_action(ctx
, dont_send
, false, recirc_id
, len
,
4913 reason
, controller_id
);
4915 if (meter_id
!= UINT32_MAX
) {
4916 nl_msg_end_nested(ctx
->odp_actions
, ac_offset
);
4917 nl_msg_end_nested(ctx
->odp_actions
, offset
);
4921 /* Creates a frozen state, and allocates a unique recirc id for the given
4922 * state. Returns a non-zero recirc id if it is allocated successfully.
4923 * Returns 0 otherwise.
4926 finish_freezing__(struct xlate_ctx
*ctx
, uint8_t table
)
4928 ovs_assert(ctx
->freezing
);
4930 struct frozen_state state
= {
4932 .ofproto_uuid
= ctx
->xbridge
->ofproto
->uuid
,
4933 .stack
= ctx
->stack
.data
,
4934 .stack_size
= ctx
->stack
.size
,
4935 .mirrors
= ctx
->mirrors
,
4936 .conntracked
= ctx
->conntracked
,
4937 .was_mpls
= ctx
->was_mpls
,
4938 .xport_uuid
= ctx
->xin
->xport_uuid
,
4939 .ofpacts
= ctx
->frozen_actions
.data
,
4940 .ofpacts_len
= ctx
->frozen_actions
.size
,
4941 .action_set
= ctx
->action_set
.data
,
4942 .action_set_len
= ctx
->action_set
.size
,
4943 .userdata
= ctx
->pause
? CONST_CAST(uint8_t *,ctx
->pause
->userdata
)
4945 .userdata_len
= ctx
->pause
? ctx
->pause
->userdata_len
: 0,
4947 frozen_metadata_from_flow(&state
.metadata
, &ctx
->xin
->flow
);
4949 /* Allocate a unique recirc id for the given metadata state in the
4950 * flow. An existing id, with a new reference to the corresponding
4951 * recirculation context, will be returned if possible.
4952 * The life-cycle of this recirc id is managed by associating it
4953 * with the udpif key ('ukey') created for each new datapath flow. */
4954 uint32_t recirc_id
= recirc_alloc_id_ctx(&state
);
4956 xlate_report_error(ctx
, "Failed to allocate recirculation id");
4957 ctx
->error
= XLATE_NO_RECIRCULATION_CONTEXT
;
4960 recirc_refs_add(&ctx
->xout
->recircs
, recirc_id
);
4963 if (!ctx
->xin
->allow_side_effects
&& !ctx
->xin
->xcache
) {
4967 put_controller_user_action(ctx
, false, true, recirc_id
,
4968 ctx
->pause
->max_len
,
4970 ctx
->pause
->controller_id
);
4972 if (ctx
->recirc_update_dp_hash
) {
4973 struct ovs_action_hash
*act_hash
;
4976 act_hash
= nl_msg_put_unspec_uninit(ctx
->odp_actions
,
4977 OVS_ACTION_ATTR_HASH
,
4979 act_hash
->hash_alg
= ctx
->dp_hash_alg
;
4980 act_hash
->hash_basis
= ctx
->dp_hash_basis
;
4982 nl_msg_put_u32(ctx
->odp_actions
, OVS_ACTION_ATTR_RECIRC
, recirc_id
);
4985 /* Undo changes done by freezing. */
4986 ctx_cancel_freeze(ctx
);
4990 /* Called only when we're freezing. */
4992 finish_freezing(struct xlate_ctx
*ctx
)
4994 xlate_commit_actions(ctx
);
4995 finish_freezing__(ctx
, 0);
4998 /* Fork the pipeline here. The current packet will continue processing the
4999 * current action list. A clone of the current packet will recirculate, skip
5000 * the remainder of the current action list and asynchronously resume pipeline
5001 * processing in 'table' with the current metadata and action set. */
5003 compose_recirculate_and_fork(struct xlate_ctx
*ctx
, uint8_t table
,
5004 const uint16_t zone
)
5007 ctx
->freezing
= true;
5008 recirc_id
= finish_freezing__(ctx
, table
);
5010 if (OVS_UNLIKELY(ctx
->xin
->trace
) && recirc_id
) {
5011 if (oftrace_add_recirc_node(ctx
->xin
->recirc_queue
,
5012 OFT_RECIRC_CONNTRACK
, &ctx
->xin
->flow
,
5013 ctx
->ct_nat_action
, ctx
->xin
->packet
,
5015 xlate_report(ctx
, OFT_DETAIL
, "A clone of the packet is forked to "
5016 "recirculate. The forked pipeline will be resumed at "
5017 "table %u.", table
);
5019 xlate_report(ctx
, OFT_DETAIL
, "Failed to trace the conntrack "
5020 "forked pipeline with recirc_id = %d.", recirc_id
);
5026 compose_mpls_push_action(struct xlate_ctx
*ctx
, struct ofpact_push_mpls
*mpls
)
5028 struct flow
*flow
= &ctx
->xin
->flow
;
5031 ovs_assert(eth_type_mpls(mpls
->ethertype
));
5033 n
= flow_count_mpls_labels(flow
, ctx
->wc
);
5035 xlate_commit_actions(ctx
);
5036 } else if (n
>= FLOW_MAX_MPLS_LABELS
) {
5037 if (ctx
->xin
->packet
!= NULL
) {
5038 xlate_report_error(ctx
, "dropping packet on which an MPLS push "
5039 "action can't be performed as it would have "
5040 "more MPLS LSEs than the %d supported.",
5041 FLOW_MAX_MPLS_LABELS
);
5043 ctx
->error
= XLATE_TOO_MANY_MPLS_LABELS
;
5047 /* Update flow's MPLS stack, and clear L3/4 fields to mark them invalid. */
5048 flow_push_mpls(flow
, n
, mpls
->ethertype
, ctx
->wc
, true);
5052 compose_mpls_pop_action(struct xlate_ctx
*ctx
, ovs_be16 eth_type
)
5054 struct flow
*flow
= &ctx
->xin
->flow
;
5055 int n
= flow_count_mpls_labels(flow
, ctx
->wc
);
5057 if (flow_pop_mpls(flow
, n
, eth_type
, ctx
->wc
)) {
5058 if (!eth_type_mpls(eth_type
) && ctx
->xbridge
->support
.odp
.recirc
) {
5059 ctx
->was_mpls
= true;
5061 } else if (n
>= FLOW_MAX_MPLS_LABELS
) {
5062 if (ctx
->xin
->packet
!= NULL
) {
5063 xlate_report_error(ctx
, "dropping packet on which an "
5064 "MPLS pop action can't be performed as it has "
5065 "more MPLS LSEs than the %d supported.",
5066 FLOW_MAX_MPLS_LABELS
);
5068 ctx
->error
= XLATE_TOO_MANY_MPLS_LABELS
;
5069 ofpbuf_clear(ctx
->odp_actions
);
5074 compose_dec_ttl(struct xlate_ctx
*ctx
, struct ofpact_cnt_ids
*ids
)
5076 struct flow
*flow
= &ctx
->xin
->flow
;
5078 if (!is_ip_any(flow
)) {
5082 ctx
->wc
->masks
.nw_ttl
= 0xff;
5083 if (flow
->nw_ttl
> 1) {
5089 for (i
= 0; i
< ids
->n_controllers
; i
++) {
5090 xlate_controller_action(ctx
, UINT16_MAX
, OFPR_INVALID_TTL
,
5091 ids
->cnt_ids
[i
], UINT32_MAX
, NULL
, 0);
5094 /* Stop processing for current table. */
5095 xlate_report(ctx
, OFT_WARN
, "IPv%d decrement TTL exception",
5096 flow
->dl_type
== htons(ETH_TYPE_IP
) ? 4 : 6);
5102 compose_set_mpls_label_action(struct xlate_ctx
*ctx
, ovs_be32 label
)
5104 if (eth_type_mpls(ctx
->xin
->flow
.dl_type
)) {
5105 ctx
->wc
->masks
.mpls_lse
[0] |= htonl(MPLS_LABEL_MASK
);
5106 set_mpls_lse_label(&ctx
->xin
->flow
.mpls_lse
[0], label
);
5111 compose_set_mpls_tc_action(struct xlate_ctx
*ctx
, uint8_t tc
)
5113 if (eth_type_mpls(ctx
->xin
->flow
.dl_type
)) {
5114 ctx
->wc
->masks
.mpls_lse
[0] |= htonl(MPLS_TC_MASK
);
5115 set_mpls_lse_tc(&ctx
->xin
->flow
.mpls_lse
[0], tc
);
5120 compose_dec_nsh_ttl_action(struct xlate_ctx
*ctx
)
5122 struct flow
*flow
= &ctx
->xin
->flow
;
5124 if ((flow
->packet_type
== htonl(PT_NSH
)) ||
5125 (flow
->dl_type
== htons(ETH_TYPE_NSH
))) {
5126 ctx
->wc
->masks
.nsh
.ttl
= 0xff;
5127 if (flow
->nsh
.ttl
> 1) {
5131 xlate_controller_action(ctx
, UINT16_MAX
, OFPR_INVALID_TTL
,
5132 0, UINT32_MAX
, NULL
, 0);
5136 /* Stop processing for current table. */
5137 xlate_report(ctx
, OFT_WARN
, "NSH decrement TTL exception");
5142 compose_set_mpls_ttl_action(struct xlate_ctx
*ctx
, uint8_t ttl
)
5144 if (eth_type_mpls(ctx
->xin
->flow
.dl_type
)) {
5145 ctx
->wc
->masks
.mpls_lse
[0] |= htonl(MPLS_TTL_MASK
);
5146 set_mpls_lse_ttl(&ctx
->xin
->flow
.mpls_lse
[0], ttl
);
5151 compose_dec_mpls_ttl_action(struct xlate_ctx
*ctx
)
5153 struct flow
*flow
= &ctx
->xin
->flow
;
5155 if (eth_type_mpls(flow
->dl_type
)) {
5156 uint8_t ttl
= mpls_lse_to_ttl(flow
->mpls_lse
[0]);
5158 ctx
->wc
->masks
.mpls_lse
[0] |= htonl(MPLS_TTL_MASK
);
5161 set_mpls_lse_ttl(&flow
->mpls_lse
[0], ttl
);
5164 xlate_controller_action(ctx
, UINT16_MAX
, OFPR_INVALID_TTL
, 0,
5165 UINT32_MAX
, NULL
, 0);
5169 /* Stop processing for current table. */
5170 xlate_report(ctx
, OFT_WARN
, "MPLS decrement TTL exception");
5175 xlate_delete_field(struct xlate_ctx
*ctx
,
5177 const struct ofpact_delete_field
*odf
)
5179 struct ds s
= DS_EMPTY_INITIALIZER
;
5181 /* Currently, only tun_metadata is allowed for delete_field action. */
5182 tun_metadata_delete(&flow
->tunnel
, odf
->field
);
5184 ds_put_format(&s
, "delete %s", odf
->field
->name
);
5185 xlate_report(ctx
, OFT_DETAIL
, "%s", ds_cstr(&s
));
5189 /* Emits an action that outputs to 'port', within 'ctx'.
5191 * 'controller_len' affects only packets sent to an OpenFlow controller. It
5192 * is the maximum number of bytes of the packet to send. UINT16_MAX means to
5193 * send the whole packet (and 0 means to omit the packet entirely).
5195 * 'may_packet_in' determines whether the packet may be sent to an OpenFlow
5196 * controller. If it is false, then the packet is never sent to the OpenFlow
5199 * 'is_last_action' should be true if this output is the last OpenFlow action
5200 * to be processed, which enables certain optimizations.
5202 * 'truncate' should be true if the packet to be output is being truncated,
5203 * which suppresses certain optimizations. */
5205 xlate_output_action(struct xlate_ctx
*ctx
, ofp_port_t port
,
5206 uint16_t controller_len
, bool may_packet_in
,
5207 bool is_last_action
, bool truncate
,
5208 bool group_bucket_action
)
5210 ofp_port_t prev_nf_output_iface
= ctx
->nf_output_iface
;
5212 ctx
->nf_output_iface
= NF_OUT_DROP
;
5216 compose_output_action(ctx
, ctx
->xin
->flow
.in_port
.ofp_port
, NULL
,
5217 is_last_action
, truncate
);
5220 xlate_table_action(ctx
, ctx
->xin
->flow
.in_port
.ofp_port
,
5221 0, may_packet_in
, true, false, false,
5228 flood_packets(ctx
, false, is_last_action
);
5231 flood_packets(ctx
, true, is_last_action
);
5233 case OFPP_CONTROLLER
:
5234 xlate_controller_action(ctx
, controller_len
,
5235 (ctx
->in_packet_out
? OFPR_PACKET_OUT
5236 : group_bucket_action
? OFPR_GROUP
5237 : ctx
->in_action_set
? OFPR_ACTION_SET
5239 0, UINT32_MAX
, NULL
, 0);
5245 if (port
!= ctx
->xin
->flow
.in_port
.ofp_port
) {
5246 compose_output_action(ctx
, port
, NULL
, is_last_action
, truncate
);
5248 xlate_report_info(ctx
, "skipping output to input port");
5253 if (prev_nf_output_iface
== NF_OUT_FLOOD
) {
5254 ctx
->nf_output_iface
= NF_OUT_FLOOD
;
5255 } else if (ctx
->nf_output_iface
== NF_OUT_DROP
) {
5256 ctx
->nf_output_iface
= prev_nf_output_iface
;
5257 } else if (prev_nf_output_iface
!= NF_OUT_DROP
&&
5258 ctx
->nf_output_iface
!= NF_OUT_FLOOD
) {
5259 ctx
->nf_output_iface
= NF_OUT_MULTI
;
5264 xlate_output_reg_action(struct xlate_ctx
*ctx
,
5265 const struct ofpact_output_reg
*or,
5266 bool is_last_action
,
5267 bool group_bucket_action
)
5269 uint64_t port
= mf_get_subfield(&or->src
, &ctx
->xin
->flow
);
5270 if (port
<= UINT16_MAX
) {
5271 xlate_report(ctx
, OFT_DETAIL
, "output port is %"PRIu64
, port
);
5273 union mf_subvalue value
;
5275 memset(&value
, 0xff, sizeof value
);
5276 mf_write_subfield_flow(&or->src
, &value
, &ctx
->wc
->masks
);
5277 xlate_output_action(ctx
, u16_to_ofp(port
), or->max_len
,
5278 false, is_last_action
, false,
5279 group_bucket_action
);
5281 xlate_report(ctx
, OFT_WARN
, "output port %"PRIu64
" is out of range",
5287 xlate_output_trunc_action(struct xlate_ctx
*ctx
,
5288 ofp_port_t port
, uint32_t max_len
,
5289 bool is_last_action
,
5290 bool group_bucket_action
)
5292 bool support_trunc
= ctx
->xbridge
->support
.trunc
;
5293 struct ovs_action_trunc
*trunc
;
5294 char name
[OFP_MAX_PORT_NAME_LEN
];
5301 case OFPP_CONTROLLER
:
5303 ofputil_port_to_string(port
, NULL
, name
, sizeof name
);
5304 xlate_report(ctx
, OFT_WARN
,
5305 "output_trunc does not support port: %s", name
);
5310 if (port
!= ctx
->xin
->flow
.in_port
.ofp_port
) {
5311 const struct xport
*xport
= get_ofp_port(ctx
->xbridge
, port
);
5313 if (xport
== NULL
|| xport
->odp_port
== ODPP_NONE
) {
5314 /* Since truncate happens at its following output action, if
5315 * the output port is a patch port, the behavior is somehow
5316 * unpredictable. For simplicity, disallow this case. */
5317 ofputil_port_to_string(port
, NULL
, name
, sizeof name
);
5318 xlate_report_error(ctx
, "output_trunc does not support "
5319 "patch port %s", name
);
5323 trunc
= nl_msg_put_unspec_uninit(ctx
->odp_actions
,
5324 OVS_ACTION_ATTR_TRUNC
,
5326 trunc
->max_len
= max_len
;
5327 xlate_output_action(ctx
, port
, 0, false, is_last_action
, true,
5328 group_bucket_action
);
5329 if (!support_trunc
) {
5330 ctx
->xout
->slow
|= SLOW_ACTION
;
5333 xlate_report_info(ctx
, "skipping output to input port");
5340 xlate_enqueue_action(struct xlate_ctx
*ctx
,
5341 const struct ofpact_enqueue
*enqueue
,
5342 bool is_last_action
,
5343 bool group_bucket_action
)
5345 ofp_port_t ofp_port
= enqueue
->port
;
5346 uint32_t queue_id
= enqueue
->queue
;
5347 uint32_t flow_priority
, priority
;
5350 /* Translate queue to priority. */
5351 error
= dpif_queue_to_priority(ctx
->xbridge
->dpif
, queue_id
, &priority
);
5353 /* Fall back to ordinary output action. */
5354 xlate_output_action(ctx
, enqueue
->port
, 0, false,
5355 is_last_action
, false,
5356 group_bucket_action
);
5360 /* Check output port. */
5361 if (ofp_port
== OFPP_IN_PORT
) {
5362 ofp_port
= ctx
->xin
->flow
.in_port
.ofp_port
;
5363 } else if (ofp_port
== ctx
->xin
->flow
.in_port
.ofp_port
) {
5367 /* Add datapath actions. */
5368 flow_priority
= ctx
->xin
->flow
.skb_priority
;
5369 ctx
->xin
->flow
.skb_priority
= priority
;
5370 compose_output_action(ctx
, ofp_port
, NULL
, is_last_action
, false);
5371 ctx
->xin
->flow
.skb_priority
= flow_priority
;
5373 /* Update NetFlow output port. */
5374 if (ctx
->nf_output_iface
== NF_OUT_DROP
) {
5375 ctx
->nf_output_iface
= ofp_port
;
5376 } else if (ctx
->nf_output_iface
!= NF_OUT_FLOOD
) {
5377 ctx
->nf_output_iface
= NF_OUT_MULTI
;
5382 xlate_set_queue_action(struct xlate_ctx
*ctx
, uint32_t queue_id
)
5384 uint32_t skb_priority
;
5386 if (!dpif_queue_to_priority(ctx
->xbridge
->dpif
, queue_id
, &skb_priority
)) {
5387 ctx
->xin
->flow
.skb_priority
= skb_priority
;
5389 /* Couldn't translate queue to a priority. Nothing to do. A warning
5390 * has already been logged. */
5395 member_enabled_cb(ofp_port_t ofp_port
, void *xbridge_
)
5397 const struct xbridge
*xbridge
= xbridge_
;
5408 case OFPP_CONTROLLER
: /* Not supported by the bundle action. */
5411 port
= get_ofp_port(xbridge
, ofp_port
);
5412 return port
? port
->may_enable
: false;
5417 xlate_bundle_action(struct xlate_ctx
*ctx
,
5418 const struct ofpact_bundle
*bundle
,
5419 bool is_last_action
,
5420 bool group_bucket_action
)
5424 port
= bundle_execute(bundle
, &ctx
->xin
->flow
, ctx
->wc
, member_enabled_cb
,
5425 CONST_CAST(struct xbridge
*, ctx
->xbridge
));
5426 if (bundle
->dst
.field
) {
5427 nxm_reg_load(&bundle
->dst
, ofp_to_u16(port
), &ctx
->xin
->flow
, ctx
->wc
);
5428 xlate_report_subfield(ctx
, &bundle
->dst
);
5430 xlate_output_action(ctx
, port
, 0, false, is_last_action
, false,
5431 group_bucket_action
);
5436 xlate_learn_action(struct xlate_ctx
*ctx
, const struct ofpact_learn
*learn
)
5438 learn_mask(learn
, ctx
->wc
);
5440 if (ctx
->xin
->xcache
|| ctx
->xin
->allow_side_effects
) {
5441 uint64_t ofpacts_stub
[1024 / 8];
5442 struct ofputil_flow_mod fm
;
5443 struct ofproto_flow_mod ofm__
, *ofm
;
5444 struct ofpbuf ofpacts
;
5447 if (ctx
->xin
->xcache
) {
5448 ofm
= xmalloc(sizeof *ofm
);
5453 ofpbuf_use_stub(&ofpacts
, ofpacts_stub
, sizeof ofpacts_stub
);
5454 learn_execute(learn
, &ctx
->xin
->flow
, &fm
, &ofpacts
);
5455 if (OVS_UNLIKELY(ctx
->xin
->trace
)) {
5456 struct ds s
= DS_EMPTY_INITIALIZER
;
5457 ds_put_format(&s
, "table=%"PRIu8
" ", fm
.table_id
);
5458 minimatch_format(&fm
.match
,
5459 ofproto_get_tun_tab(&ctx
->xin
->ofproto
->up
),
5460 NULL
, &s
, OFP_DEFAULT_PRIORITY
);
5462 ds_put_format(&s
, " priority=%d", fm
.priority
);
5463 if (fm
.new_cookie
) {
5464 ds_put_format(&s
, " cookie=%#"PRIx64
, ntohll(fm
.new_cookie
));
5466 if (fm
.idle_timeout
!= OFP_FLOW_PERMANENT
) {
5467 ds_put_format(&s
, " idle=%"PRIu16
, fm
.idle_timeout
);
5469 if (fm
.hard_timeout
!= OFP_FLOW_PERMANENT
) {
5470 ds_put_format(&s
, " hard=%"PRIu16
, fm
.hard_timeout
);
5472 if (fm
.flags
& NX_LEARN_F_SEND_FLOW_REM
) {
5473 ds_put_cstr(&s
, " send_flow_rem");
5475 ds_put_cstr(&s
, " actions=");
5476 struct ofpact_format_params fp
= { .s
= &s
};
5477 ofpacts_format(fm
.ofpacts
, fm
.ofpacts_len
, &fp
);
5478 xlate_report(ctx
, OFT_DETAIL
, "%s", ds_cstr(&s
));
5481 error
= ofproto_dpif_flow_mod_init_for_learn(ctx
->xbridge
->ofproto
,
5483 ofpbuf_uninit(&ofpacts
);
5486 bool success
= true;
5487 if (ctx
->xin
->allow_side_effects
) {
5488 error
= ofproto_flow_mod_learn(ofm
, ctx
->xin
->xcache
!= NULL
,
5489 learn
->limit
, &success
);
5490 } else if (learn
->limit
) {
5492 || ofm
->temp_rule
->state
!= RULE_INSERTED
) {
5493 /* The learned rule expired and there are no packets, so
5494 * we cannot learn again. Since the translated actions
5495 * depend on the result of learning, we tell the caller
5496 * that there's no point in caching this result. */
5497 ctx
->xout
->avoid_caching
= true;
5501 if (learn
->flags
& NX_LEARN_F_WRITE_RESULT
) {
5502 nxm_reg_load(&learn
->result_dst
, success
? 1 : 0,
5503 &ctx
->xin
->flow
, ctx
->wc
);
5504 xlate_report_subfield(ctx
, &learn
->result_dst
);
5507 if (success
&& ctx
->xin
->xcache
) {
5508 struct xc_entry
*entry
;
5510 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_LEARN
);
5511 entry
->learn
.ofm
= ofm
;
5512 entry
->learn
.limit
= learn
->limit
;
5515 ofproto_flow_mod_uninit(ofm
);
5518 if (OVS_UNLIKELY(ctx
->xin
->trace
&& !success
)) {
5519 xlate_report(ctx
, OFT_DETAIL
, "Limit exceeded, learn failed");
5523 if (ofm
!= &ofm__
) {
5528 xlate_report_error(ctx
, "LEARN action execution failed (%s).",
5529 ofperr_to_string(error
));
5532 minimatch_destroy(&fm
.match
);
5534 xlate_report(ctx
, OFT_WARN
,
5535 "suppressing side effects, so learn action ignored");
5540 xlate_fin_timeout__(struct rule_dpif
*rule
, uint16_t tcp_flags
,
5541 uint16_t idle_timeout
, uint16_t hard_timeout
)
5543 if (tcp_flags
& (TCP_FIN
| TCP_RST
)) {
5544 ofproto_rule_reduce_timeouts(&rule
->up
, idle_timeout
, hard_timeout
);
5549 xlate_fin_timeout(struct xlate_ctx
*ctx
,
5550 const struct ofpact_fin_timeout
*oft
)
5553 if (ctx
->xin
->allow_side_effects
) {
5554 xlate_fin_timeout__(ctx
->rule
, ctx
->xin
->tcp_flags
,
5555 oft
->fin_idle_timeout
, oft
->fin_hard_timeout
);
5557 if (ctx
->xin
->xcache
) {
5558 struct xc_entry
*entry
;
5560 entry
= xlate_cache_add_entry(ctx
->xin
->xcache
, XC_FIN_TIMEOUT
);
5561 /* XC_RULE already holds a reference on the rule, none is taken
5563 entry
->fin
.rule
= ctx
->rule
;
5564 entry
->fin
.idle
= oft
->fin_idle_timeout
;
5565 entry
->fin
.hard
= oft
->fin_hard_timeout
;
5571 xlate_sample_action(struct xlate_ctx
*ctx
,
5572 const struct ofpact_sample
*os
)
5574 odp_port_t output_odp_port
= ODPP_NONE
;
5575 odp_port_t tunnel_out_port
= ODPP_NONE
;
5576 struct dpif_ipfix
*ipfix
= ctx
->xbridge
->ipfix
;
5577 bool emit_set_tunnel
= false;
5579 if (!ipfix
|| ctx
->xin
->flow
.in_port
.ofp_port
== OFPP_NONE
) {
5583 /* Scale the probability from 16-bit to 32-bit while representing
5584 * the same percentage. */
5585 uint32_t probability
= (os
->probability
<< 16) | os
->probability
;
5587 /* If ofp_port in flow sample action is equel to ofp_port,
5588 * this sample action is a input port action. */
5589 if (os
->sampling_port
!= OFPP_NONE
&&
5590 os
->sampling_port
!= ctx
->xin
->flow
.in_port
.ofp_port
) {
5591 output_odp_port
= ofp_port_to_odp_port(ctx
->xbridge
,
5593 if (output_odp_port
== ODPP_NONE
) {
5594 xlate_report_error(ctx
, "can't use unknown port %d in flow sample "
5595 "action", os
->sampling_port
);
5599 if (dpif_ipfix_get_flow_exporter_tunnel_sampling(ipfix
,
5600 os
->collector_set_id
)
5601 && dpif_ipfix_is_tunnel_port(ipfix
, output_odp_port
)) {
5602 tunnel_out_port
= output_odp_port
;
5603 emit_set_tunnel
= true;
5607 xlate_commit_actions(ctx
);
5608 /* If 'emit_set_tunnel', sample(sampling_port=1) would translate
5609 * into datapath sample action set(tunnel(...)), sample(...) and
5610 * it is used for sampling egress tunnel information. */
5611 if (emit_set_tunnel
) {
5612 const struct xport
*xport
= get_ofp_port(ctx
->xbridge
,
5615 if (xport
&& xport
->is_tunnel
) {
5616 struct flow
*flow
= &ctx
->xin
->flow
;
5617 tnl_port_send(xport
->ofport
, flow
, ctx
->wc
);
5618 if (!ovs_native_tunneling_is_on(ctx
->xbridge
->ofproto
)) {
5619 struct flow_tnl flow_tnl
= flow
->tunnel
;
5620 const char *tnl_type
;
5622 tnl_type
= tnl_port_get_type(xport
->ofport
);
5623 commit_odp_tunnel_action(flow
, &ctx
->base_flow
,
5624 ctx
->odp_actions
, tnl_type
);
5625 flow
->tunnel
= flow_tnl
;
5628 xlate_report_error(ctx
,
5629 "sampling_port:%d should be a tunnel port.",
5634 struct user_action_cookie cookie
;
5636 memset(&cookie
, 0, sizeof cookie
);
5637 cookie
.type
= USER_ACTION_COOKIE_FLOW_SAMPLE
;
5638 cookie
.ofp_in_port
= ctx
->xin
->flow
.in_port
.ofp_port
;
5639 cookie
.ofproto_uuid
= ctx
->xbridge
->ofproto
->uuid
;
5640 cookie
.flow_sample
.probability
= os
->probability
;
5641 cookie
.flow_sample
.collector_set_id
= os
->collector_set_id
;
5642 cookie
.flow_sample
.obs_domain_id
= os
->obs_domain_id
;
5643 cookie
.flow_sample
.obs_point_id
= os
->obs_point_id
;
5644 cookie
.flow_sample
.output_odp_port
= output_odp_port
;
5645 cookie
.flow_sample
.direction
= os
->direction
;
5647 compose_sample_action(ctx
, probability
, &cookie
, tunnel_out_port
, false);
5650 /* Determine if an datapath action translated from the openflow action
5651 * can be reversed by another datapath action.
5653 * Openflow actions that do not emit datapath actions are trivially
5654 * reversible. Reversiblity of other actions depends on nature of
5655 * action and their translation. */
5657 reversible_actions(const struct ofpact
*ofpacts
, size_t ofpacts_len
)
5659 const struct ofpact
*a
;
5661 OFPACT_FOR_EACH (a
, ofpacts
, ofpacts_len
) {
5664 case OFPACT_CLEAR_ACTIONS
:
5666 case OFPACT_CONJUNCTION
:
5667 case OFPACT_CONTROLLER
:
5668 case OFPACT_CT_CLEAR
:
5669 case OFPACT_DEBUG_RECIRC
:
5670 case OFPACT_DEBUG_SLOW
:
5671 case OFPACT_DEC_MPLS_TTL
:
5672 case OFPACT_DEC_TTL
:
5673 case OFPACT_ENQUEUE
:
5675 case OFPACT_FIN_TIMEOUT
:
5676 case OFPACT_GOTO_TABLE
:
5679 case OFPACT_MULTIPATH
:
5682 case OFPACT_OUTPUT_REG
:
5683 case OFPACT_POP_MPLS
:
5684 case OFPACT_POP_QUEUE
:
5685 case OFPACT_PUSH_MPLS
:
5686 case OFPACT_PUSH_VLAN
:
5687 case OFPACT_REG_MOVE
:
5688 case OFPACT_RESUBMIT
:
5690 case OFPACT_SET_ETH_DST
:
5691 case OFPACT_SET_ETH_SRC
:
5692 case OFPACT_SET_FIELD
:
5693 case OFPACT_SET_IP_DSCP
:
5694 case OFPACT_SET_IP_ECN
:
5695 case OFPACT_SET_IP_TTL
:
5696 case OFPACT_SET_IPV4_DST
:
5697 case OFPACT_SET_IPV4_SRC
:
5698 case OFPACT_SET_L4_DST_PORT
:
5699 case OFPACT_SET_L4_SRC_PORT
:
5700 case OFPACT_SET_MPLS_LABEL
:
5701 case OFPACT_SET_MPLS_TC
:
5702 case OFPACT_SET_MPLS_TTL
:
5703 case OFPACT_SET_QUEUE
:
5704 case OFPACT_SET_TUNNEL
:
5705 case OFPACT_SET_VLAN_PCP
:
5706 case OFPACT_SET_VLAN_VID
:
5707 case OFPACT_STACK_POP
:
5708 case OFPACT_STACK_PUSH
:
5709 case OFPACT_STRIP_VLAN
:
5710 case OFPACT_UNROLL_XLATE
:
5711 case OFPACT_WRITE_ACTIONS
:
5712 case OFPACT_WRITE_METADATA
:
5713 case OFPACT_CHECK_PKT_LARGER
:
5714 case OFPACT_DELETE_FIELD
:
5720 case OFPACT_OUTPUT_TRUNC
:
5723 case OFPACT_DEC_NSH_TTL
:
5731 clone_xlate_actions(const struct ofpact
*actions
, size_t actions_len
,
5732 struct xlate_ctx
*ctx
, bool is_last_action
,
5733 bool group_bucket_action OVS_UNUSED
)
5735 struct ofpbuf old_stack
= ctx
->stack
;
5736 union mf_subvalue new_stack
[1024 / sizeof(union mf_subvalue
)];
5737 ofpbuf_use_stub(&ctx
->stack
, new_stack
, sizeof new_stack
);
5738 ofpbuf_put(&ctx
->stack
, old_stack
.data
, old_stack
.size
);
5740 struct ofpbuf old_action_set
= ctx
->action_set
;
5741 uint64_t actset_stub
[1024 / 8];
5742 ofpbuf_use_stub(&ctx
->action_set
, actset_stub
, sizeof actset_stub
);
5743 ofpbuf_put(&ctx
->action_set
, old_action_set
.data
, old_action_set
.size
);
5745 size_t offset
, ac_offset
;
5746 struct flow old_flow
= ctx
->xin
->flow
;
5748 if (reversible_actions(actions
, actions_len
) || is_last_action
) {
5749 old_flow
= ctx
->xin
->flow
;
5750 do_xlate_actions(actions
, actions_len
, ctx
, is_last_action
, false);
5751 if (!ctx
->freezing
) {
5752 xlate_action_set(ctx
);
5754 if (ctx
->freezing
) {
5755 finish_freezing(ctx
);
5760 /* Commit datapath actions before emitting the clone action to
5761 * avoid emitting those actions twice. Once inside
5762 * the clone, another time for the action after clone. */
5763 xlate_commit_actions(ctx
);
5764 struct flow old_base
= ctx
->base_flow
;
5765 bool old_was_mpls
= ctx
->was_mpls
;
5766 bool old_conntracked
= ctx
->conntracked
;
5768 /* The actions are not reversible, a datapath clone action is
5769 * required to encode the translation. Select the clone action
5770 * based on datapath capabilities. */
5771 if (ctx
->xbridge
->support
.clone
) { /* Use clone action */
5772 /* Use clone action as datapath clone. */
5773 offset
= nl_msg_start_nested(ctx
->odp_actions
, OVS_ACTION_ATTR_CLONE
);
5774 do_xlate_actions(actions
, actions_len
, ctx
, true, false);
5775 if (!ctx
->freezing
) {
5776 xlate_action_set(ctx
);
5778 if (ctx
->freezing
) {
5779 finish_freezing(ctx
);
5781 nl_msg_end_non_empty_nested(ctx
->odp_actions
, offset
);
5785 if (ctx
->xbridge
->support
.sample_nesting
> 3) {
5786 /* Use sample action as datapath clone. */
5787 offset
= nl_msg_start_nested(ctx
->odp_actions
, OVS_ACTION_ATTR_SAMPLE
);
5788 ac_offset
= nl_msg_start_nested(ctx
->odp_actions
,
5789 OVS_SAMPLE_ATTR_ACTIONS
);
5790 do_xlate_actions(actions
, actions_len
, ctx
, true, false);
5791 if (!ctx
->freezing
) {
5792 xlate_action_set(ctx
);
5794 if (ctx
->freezing
) {
5795 finish_freezing(ctx
);
5797 if (nl_msg_end_non_empty_nested(ctx
->odp_actions
, ac_offset
)) {
5798 nl_msg_cancel_nested(ctx
->odp_actions
, offset
);
5800 nl_msg_put_u32(ctx
->odp_actions
, OVS_SAMPLE_ATTR_PROBABILITY
,
5801 UINT32_MAX
); /* 100% probability. */
5802 nl_msg_end_nested(ctx
->odp_actions
, offset
);
5807 /* Datapath does not support clone, skip xlate 'oc' and
5808 * report an error */
5809 xlate_report_error(ctx
, "Failed to compose clone action");
5812 /* The clone's conntrack execution should have no effect on the original
5814 ctx
->conntracked
= old_conntracked
;
5816 /* Popping MPLS from the clone should have no effect on the original
5818 ctx
->was_mpls
= old_was_mpls
;
5820 /* Restore the 'base_flow' for the next action. */
5821 ctx
->base_flow
= old_base
;
5824 ofpbuf_uninit(&ctx
->action_set
);
5825 ctx
->action_set
= old_action_set
;
5826 ofpbuf_uninit(&ctx
->stack
);
5827 ctx
->stack
= old_stack
;
5828 ctx
->xin
->flow
= old_flow
;
5832 compose_clone(struct xlate_ctx
*ctx
, const struct ofpact_nest
*oc
,
5833 bool is_last_action
)
5835 size_t oc_actions_len
= ofpact_nest_get_action_len(oc
);
5837 clone_xlate_actions(oc
->actions
, oc_actions_len
, ctx
, is_last_action
,
5842 xlate_meter_action(struct xlate_ctx
*ctx
, const struct ofpact_meter
*meter
)
5844 if (meter
->provider_meter_id
!= UINT32_MAX
) {
5845 nl_msg_put_u32(ctx
->odp_actions
, OVS_ACTION_ATTR_METER
,
5846 meter
->provider_meter_id
);
5851 may_receive(const struct xport
*xport
, struct xlate_ctx
*ctx
)
5853 if (xport
->config
& (is_stp(&ctx
->xin
->flow
)
5854 ? OFPUTIL_PC_NO_RECV_STP
5855 : OFPUTIL_PC_NO_RECV
)) {
5859 /* Only drop packets here if both forwarding and learning are
5860 * disabled. If just learning is enabled, we need to have
5861 * OFPP_NORMAL and the learning action have a look at the packet
5862 * before we can drop it. */
5863 if ((!xport_stp_forward_state(xport
) && !xport_stp_learn_state(xport
)) ||
5864 (!xport_rstp_forward_state(xport
) && !xport_rstp_learn_state(xport
))) {
5872 xlate_write_actions__(struct xlate_ctx
*ctx
,
5873 const struct ofpact
*ofpacts
, size_t ofpacts_len
)
5875 /* Maintain actset_output depending on the contents of the action set:
5877 * - OFPP_UNSET, if there is no "output" action.
5879 * - The output port, if there is an "output" action and no "group"
5882 * - OFPP_UNSET, if there is a "group" action.
5884 if (!ctx
->action_set_has_group
) {
5885 const struct ofpact
*a
;
5886 OFPACT_FOR_EACH (a
, ofpacts
, ofpacts_len
) {
5887 if (a
->type
== OFPACT_OUTPUT
) {
5888 ctx
->xin
->flow
.actset_output
= ofpact_get_OUTPUT(a
)->port
;
5889 } else if (a
->type
== OFPACT_GROUP
) {
5890 ctx
->xin
->flow
.actset_output
= OFPP_UNSET
;
5891 ctx
->action_set_has_group
= true;
5897 ofpbuf_put(&ctx
->action_set
, ofpacts
, ofpacts_len
);
5901 xlate_write_actions(struct xlate_ctx
*ctx
, const struct ofpact_nest
*a
)
5903 xlate_write_actions__(ctx
, a
->actions
, ofpact_nest_get_action_len(a
));
5907 xlate_action_set(struct xlate_ctx
*ctx
)
5909 uint64_t action_list_stub
[1024 / 8];
5910 struct ofpbuf action_list
= OFPBUF_STUB_INITIALIZER(action_list_stub
);
5911 ofpacts_execute_action_set(&action_list
, &ctx
->action_set
);
5912 /* Clear the action set, as it is not needed any more. */
5913 ofpbuf_clear(&ctx
->action_set
);
5914 if (action_list
.size
) {
5915 ctx
->in_action_set
= true;
5917 struct ovs_list
*old_trace
= ctx
->xin
->trace
;
5918 ctx
->xin
->trace
= xlate_report(ctx
, OFT_TABLE
,
5919 "--. Executing action set:");
5920 do_xlate_actions(action_list
.data
, action_list
.size
, ctx
, true, false);
5921 ctx
->xin
->trace
= old_trace
;
5923 ctx
->in_action_set
= false;
5925 ofpbuf_uninit(&action_list
);
5929 freeze_put_unroll_xlate(struct xlate_ctx
*ctx
)
5931 struct ofpact_unroll_xlate
*unroll
= ctx
->frozen_actions
.header
;
5933 /* Restore the table_id and rule cookie for a potential PACKET
5936 (ctx
->table_id
!= unroll
->rule_table_id
5937 || ctx
->rule_cookie
!= unroll
->rule_cookie
)) {
5938 unroll
= ofpact_put_UNROLL_XLATE(&ctx
->frozen_actions
);
5939 unroll
->rule_table_id
= ctx
->table_id
;
5940 unroll
->rule_cookie
= ctx
->rule_cookie
;
5941 ctx
->frozen_actions
.header
= unroll
;
5946 /* Copy actions 'a' through 'end' to ctx->frozen_actions, which will be
5947 * executed after thawing. Inserts an UNROLL_XLATE action, if none is already
5948 * present, before any action that may depend on the current table ID or flow
5951 freeze_unroll_actions(const struct ofpact
*a
, const struct ofpact
*end
,
5952 struct xlate_ctx
*ctx
)
5954 for (; a
< end
; a
= ofpact_next(a
)) {
5956 case OFPACT_OUTPUT_REG
:
5957 case OFPACT_OUTPUT_TRUNC
:
5960 case OFPACT_CONTROLLER
:
5961 case OFPACT_DEC_MPLS_TTL
:
5962 case OFPACT_DEC_NSH_TTL
:
5963 case OFPACT_DEC_TTL
:
5964 /* These actions may generate asynchronous messages, which include
5965 * table ID and flow cookie information. */
5966 freeze_put_unroll_xlate(ctx
);
5969 case OFPACT_RESUBMIT
:
5970 if (ofpact_get_RESUBMIT(a
)->table_id
== 0xff) {
5971 /* This resubmit action is relative to the current table, so we
5972 * need to track what table that is.*/
5973 freeze_put_unroll_xlate(ctx
);
5977 case OFPACT_SET_TUNNEL
:
5978 case OFPACT_REG_MOVE
:
5979 case OFPACT_SET_FIELD
:
5980 case OFPACT_STACK_PUSH
:
5981 case OFPACT_STACK_POP
:
5983 case OFPACT_WRITE_METADATA
:
5984 case OFPACT_GOTO_TABLE
:
5985 case OFPACT_ENQUEUE
:
5986 case OFPACT_SET_VLAN_VID
:
5987 case OFPACT_SET_VLAN_PCP
:
5988 case OFPACT_STRIP_VLAN
:
5989 case OFPACT_PUSH_VLAN
:
5990 case OFPACT_SET_ETH_SRC
:
5991 case OFPACT_SET_ETH_DST
:
5992 case OFPACT_SET_IPV4_SRC
:
5993 case OFPACT_SET_IPV4_DST
:
5994 case OFPACT_SET_IP_DSCP
:
5995 case OFPACT_SET_IP_ECN
:
5996 case OFPACT_SET_IP_TTL
:
5997 case OFPACT_SET_L4_SRC_PORT
:
5998 case OFPACT_SET_L4_DST_PORT
:
5999 case OFPACT_SET_QUEUE
:
6000 case OFPACT_POP_QUEUE
:
6001 case OFPACT_PUSH_MPLS
:
6002 case OFPACT_POP_MPLS
:
6003 case OFPACT_SET_MPLS_LABEL
:
6004 case OFPACT_SET_MPLS_TC
:
6005 case OFPACT_SET_MPLS_TTL
:
6006 case OFPACT_MULTIPATH
:
6009 case OFPACT_UNROLL_XLATE
:
6010 case OFPACT_FIN_TIMEOUT
:
6011 case OFPACT_CLEAR_ACTIONS
:
6012 case OFPACT_WRITE_ACTIONS
:
6018 case OFPACT_DEBUG_RECIRC
:
6019 case OFPACT_DEBUG_SLOW
:
6021 case OFPACT_CT_CLEAR
:
6023 case OFPACT_CHECK_PKT_LARGER
:
6024 case OFPACT_DELETE_FIELD
:
6025 /* These may not generate PACKET INs. */
6029 case OFPACT_CONJUNCTION
:
6030 /* These need not be copied for restoration. */
6033 /* Copy the action over. */
6034 ofpbuf_put(&ctx
->frozen_actions
, a
, OFPACT_ALIGN(a
->len
));
6039 put_ct_mark(const struct flow
*flow
, struct ofpbuf
*odp_actions
,
6040 struct flow_wildcards
*wc
)
6042 if (wc
->masks
.ct_mark
) {
6048 odp_ct_mark
= nl_msg_put_unspec_uninit(odp_actions
, OVS_CT_ATTR_MARK
,
6049 sizeof(*odp_ct_mark
));
6050 odp_ct_mark
->key
= flow
->ct_mark
& wc
->masks
.ct_mark
;
6051 odp_ct_mark
->mask
= wc
->masks
.ct_mark
;
6056 put_ct_label(const struct flow
*flow
, struct ofpbuf
*odp_actions
,
6057 struct flow_wildcards
*wc
)
6059 if (!ovs_u128_is_zero(wc
->masks
.ct_label
)) {
6065 odp_ct_label
.key
= ovs_u128_and(flow
->ct_label
, wc
->masks
.ct_label
);
6066 odp_ct_label
.mask
= wc
->masks
.ct_label
;
6067 nl_msg_put_unspec(odp_actions
, OVS_CT_ATTR_LABELS
,
6068 &odp_ct_label
, sizeof odp_ct_label
);
6073 put_drop_action(struct ofpbuf
*odp_actions
, enum xlate_error error
)
6075 nl_msg_put_u32(odp_actions
, OVS_ACTION_ATTR_DROP
, error
);
6079 put_ct_helper(struct xlate_ctx
*ctx
,
6080 struct ofpbuf
*odp_actions
, struct ofpact_conntrack
*ofc
)
6085 nl_msg_put_string(odp_actions
, OVS_CT_ATTR_HELPER
, "ftp");
6088 nl_msg_put_string(odp_actions
, OVS_CT_ATTR_HELPER
, "tftp");
6091 xlate_report_error(ctx
, "cannot serialize ct_helper %d", ofc
->alg
);
6098 put_ct_timeout(struct ofpbuf
*odp_actions
, const struct dpif_backer
*backer
,
6099 const struct flow
*flow
, struct flow_wildcards
*wc
,
6103 char *tp_name
= NULL
;
6105 if (ofproto_dpif_ct_zone_timeout_policy_get_name(backer
, zone_id
,
6106 ntohs(flow
->dl_type
), flow
->nw_proto
, &tp_name
, &unwildcard
)) {
6107 nl_msg_put_string(odp_actions
, OVS_CT_ATTR_TIMEOUT
, tp_name
);
6110 /* The underlying datapath requires separate timeout
6111 * policies for different Ethertypes and IP protocols. We
6112 * don't need to unwildcard 'wc->masks.dl_type' since that
6113 * field is always unwildcarded in megaflows. */
6114 memset(&wc
->masks
.nw_proto
, 0xff, sizeof wc
->masks
.nw_proto
);
6121 put_ct_nat(struct xlate_ctx
*ctx
)
6123 struct ofpact_nat
*ofn
= ctx
->ct_nat_action
;
6130 nat_offset
= nl_msg_start_nested(ctx
->odp_actions
, OVS_CT_ATTR_NAT
);
6131 if (ofn
->flags
& NX_NAT_F_SRC
|| ofn
->flags
& NX_NAT_F_DST
) {
6132 nl_msg_put_flag(ctx
->odp_actions
, ofn
->flags
& NX_NAT_F_SRC
6133 ? OVS_NAT_ATTR_SRC
: OVS_NAT_ATTR_DST
);
6134 if (ofn
->flags
& NX_NAT_F_PERSISTENT
) {
6135 nl_msg_put_flag(ctx
->odp_actions
, OVS_NAT_ATTR_PERSISTENT
);
6137 if (ofn
->flags
& NX_NAT_F_PROTO_HASH
) {
6138 nl_msg_put_flag(ctx
->odp_actions
, OVS_NAT_ATTR_PROTO_HASH
);
6139 } else if (ofn
->flags
& NX_NAT_F_PROTO_RANDOM
) {
6140 nl_msg_put_flag(ctx
->odp_actions
, OVS_NAT_ATTR_PROTO_RANDOM
);
6142 if (ofn
->range_af
== AF_INET
) {
6143 nl_msg_put_be32(ctx
->odp_actions
, OVS_NAT_ATTR_IP_MIN
,
6144 ofn
->range
.addr
.ipv4
.min
);
6145 if (ofn
->range
.addr
.ipv4
.max
&&
6146 (ntohl(ofn
->range
.addr
.ipv4
.max
)
6147 > ntohl(ofn
->range
.addr
.ipv4
.min
))) {
6148 nl_msg_put_be32(ctx
->odp_actions
, OVS_NAT_ATTR_IP_MAX
,
6149 ofn
->range
.addr
.ipv4
.max
);
6151 } else if (ofn
->range_af
== AF_INET6
) {
6152 nl_msg_put_unspec(ctx
->odp_actions
, OVS_NAT_ATTR_IP_MIN
,
6153 &ofn
->range
.addr
.ipv6
.min
,
6154 sizeof ofn
->range
.addr
.ipv6
.min
);
6155 if (!ipv6_mask_is_any(&ofn
->range
.addr
.ipv6
.max
) &&
6156 memcmp(&ofn
->range
.addr
.ipv6
.max
, &ofn
->range
.addr
.ipv6
.min
,
6157 sizeof ofn
->range
.addr
.ipv6
.max
) > 0) {
6158 nl_msg_put_unspec(ctx
->odp_actions
, OVS_NAT_ATTR_IP_MAX
,
6159 &ofn
->range
.addr
.ipv6
.max
,
6160 sizeof ofn
->range
.addr
.ipv6
.max
);
6163 if (ofn
->range_af
!= AF_UNSPEC
&& ofn
->range
.proto
.min
) {
6164 nl_msg_put_u16(ctx
->odp_actions
, OVS_NAT_ATTR_PROTO_MIN
,
6165 ofn
->range
.proto
.min
);
6166 if (ofn
->range
.proto
.max
&&
6167 ofn
->range
.proto
.max
> ofn
->range
.proto
.min
) {
6168 nl_msg_put_u16(ctx
->odp_actions
, OVS_NAT_ATTR_PROTO_MAX
,
6169 ofn
->range
.proto
.max
);
6173 nl_msg_end_nested(ctx
->odp_actions
, nat_offset
);
6177 compose_conntrack_action(struct xlate_ctx
*ctx
, struct ofpact_conntrack
*ofc
,
6178 bool is_last_action
)
6180 ovs_u128 old_ct_label_mask
= ctx
->wc
->masks
.ct_label
;
6181 uint32_t old_ct_mark_mask
= ctx
->wc
->masks
.ct_mark
;
6185 /* Ensure that any prior actions are applied before composing the new
6186 * conntrack action. */
6187 xlate_commit_actions(ctx
);
6189 /* Process nested actions first, to populate the key. */
6190 ctx
->ct_nat_action
= NULL
;
6191 ctx
->wc
->masks
.ct_mark
= 0;
6192 ctx
->wc
->masks
.ct_label
= OVS_U128_ZERO
;
6193 do_xlate_actions(ofc
->actions
, ofpact_ct_get_action_len(ofc
), ctx
,
6194 is_last_action
, false);
6196 if (ofc
->zone_src
.field
) {
6197 zone
= mf_get_subfield(&ofc
->zone_src
, &ctx
->xin
->flow
);
6199 zone
= ofc
->zone_imm
;
6202 ct_offset
= nl_msg_start_nested(ctx
->odp_actions
, OVS_ACTION_ATTR_CT
);
6203 if (ofc
->flags
& NX_CT_F_COMMIT
) {
6204 nl_msg_put_flag(ctx
->odp_actions
, ofc
->flags
& NX_CT_F_FORCE
?
6205 OVS_CT_ATTR_FORCE_COMMIT
: OVS_CT_ATTR_COMMIT
);
6206 if (ctx
->xbridge
->support
.ct_eventmask
) {
6207 nl_msg_put_u32(ctx
->odp_actions
, OVS_CT_ATTR_EVENTMASK
,
6208 OVS_CT_EVENTMASK_DEFAULT
);
6210 if (ctx
->xbridge
->support
.ct_timeout
) {
6211 put_ct_timeout(ctx
->odp_actions
, ctx
->xbridge
->ofproto
->backer
,
6212 &ctx
->xin
->flow
, ctx
->wc
, zone
);
6215 nl_msg_put_u16(ctx
->odp_actions
, OVS_CT_ATTR_ZONE
, zone
);
6216 put_ct_mark(&ctx
->xin
->flow
, ctx
->odp_actions
, ctx
->wc
);
6217 put_ct_label(&ctx
->xin
->flow
, ctx
->odp_actions
, ctx
->wc
);
6218 put_ct_helper(ctx
, ctx
->odp_actions
, ofc
);
6220 nl_msg_end_nested(ctx
->odp_actions
, ct_offset
);
6222 ctx
->wc
->masks
.ct_mark
= old_ct_mark_mask
;
6223 ctx
->wc
->masks
.ct_label
= old_ct_label_mask
;
6225 if (ofc
->recirc_table
!= NX_CT_RECIRC_NONE
) {
6226 ctx
->conntracked
= true;
6227 compose_recirculate_and_fork(ctx
, ofc
->recirc_table
, zone
);
6230 ctx
->ct_nat_action
= NULL
;
6232 /* The ct_* fields are only available in the scope of the 'recirc_table'
6234 flow_clear_conntrack(&ctx
->xin
->flow
);
6235 xlate_report(ctx
, OFT_DETAIL
, "Sets the packet to an untracked state, "
6236 "and clears all the conntrack fields.");
6237 ctx
->conntracked
= false;
6241 compose_ct_clear_action(struct xlate_ctx
*ctx
)
6243 clear_conntrack(ctx
);
6244 /* This action originally existed without dpif support. So to preserve
6245 * compatibility, only append it if the dpif supports it. */
6246 if (ctx
->xbridge
->support
.ct_clear
) {
6247 nl_msg_put_flag(ctx
->odp_actions
, OVS_ACTION_ATTR_CT_CLEAR
);
6251 /* check_pkt_larger action checks the packet length and stores the
6252 * result in the register bit. We translate this action to the
6253 * datapath action - 'check_pkt_len' whose format
6254 * is: 'check_pkt_len(pkt_len, ge(actions), le(actions))'.
6256 * We first set the destination register bit to 1 and call
6257 * 'do_xlate_actions' for the case - packet len greater than
6258 * the specified packet length.
6260 * We then set the destination register bit to 0 and call
6261 * 'do_xlate_actions' for the case - packet length is lesser or
6262 * equal to the specified packet length.
6264 * It is possible for freezing to happen for both the cases.
6267 xlate_check_pkt_larger(struct xlate_ctx
*ctx
,
6268 struct ofpact_check_pkt_larger
*check_pkt_larger
,
6269 const struct ofpact
*remaining_acts
,
6270 size_t remaining_acts_len
)
6272 union mf_subvalue value
;
6273 memset(&value
, 0, sizeof value
);
6274 if (!ctx
->xbridge
->support
.check_pkt_len
) {
6275 uint8_t is_pkt_larger
= 0;
6276 if (ctx
->xin
->packet
) {
6278 dp_packet_size(ctx
->xin
->packet
) > check_pkt_larger
->pkt_len
;
6280 value
.u8_val
= is_pkt_larger
;
6281 mf_write_subfield_flow(&check_pkt_larger
->dst
, &value
,
6283 /* If datapath doesn't support check_pkt_len action, then set the
6284 * SLOW_ACTION flag. If we don't set SLOW_ACTION, we
6285 * will push a flow to the datapath based on the packet length
6286 * in ctx->xin->packet. For subsequent patches which match the
6287 * same flow, datapath will apply the actions without considering
6288 * the packet length. This results in wrong actions being applied.
6290 ctx
->xout
->slow
|= SLOW_ACTION
;
6294 struct ofpbuf old_stack
= ctx
->stack
;
6295 union mf_subvalue new_stack
[1024 / sizeof(union mf_subvalue
)];
6296 ofpbuf_use_stub(&ctx
->stack
, new_stack
, sizeof new_stack
);
6297 ofpbuf_put(&ctx
->stack
, old_stack
.data
, old_stack
.size
);
6299 struct ofpbuf old_action_set
= ctx
->action_set
;
6300 uint64_t actset_stub
[1024 / 8];
6301 ofpbuf_use_stub(&ctx
->action_set
, actset_stub
, sizeof actset_stub
);
6302 ofpbuf_put(&ctx
->action_set
, old_action_set
.data
, old_action_set
.size
);
6304 struct flow old_flow
= ctx
->xin
->flow
;
6305 xlate_commit_actions(ctx
);
6306 struct flow old_base
= ctx
->base_flow
;
6307 bool old_was_mpls
= ctx
->was_mpls
;
6308 bool old_conntracked
= ctx
->conntracked
;
6310 size_t offset
= nl_msg_start_nested(ctx
->odp_actions
,
6311 OVS_ACTION_ATTR_CHECK_PKT_LEN
);
6312 nl_msg_put_u16(ctx
->odp_actions
, OVS_CHECK_PKT_LEN_ATTR_PKT_LEN
,
6313 check_pkt_larger
->pkt_len
);
6314 size_t offset_attr
= nl_msg_start_nested(
6315 ctx
->odp_actions
, OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER
);
6317 mf_write_subfield_flow(&check_pkt_larger
->dst
, &value
, &ctx
->xin
->flow
);
6318 do_xlate_actions(remaining_acts
, remaining_acts_len
, ctx
, true, false);
6319 if (!ctx
->freezing
) {
6320 xlate_action_set(ctx
);
6322 if (ctx
->freezing
) {
6323 finish_freezing(ctx
);
6325 nl_msg_end_nested(ctx
->odp_actions
, offset_attr
);
6327 ctx
->base_flow
= old_base
;
6328 ctx
->was_mpls
= old_was_mpls
;
6329 ctx
->conntracked
= old_conntracked
;
6330 ctx
->xin
->flow
= old_flow
;
6332 /* If the flow translation for the IF_GREATER case requires freezing,
6333 * then ctx->exit would be true. Reset to false so that we can
6334 * do flow translation for 'IF_LESS_EQUAL' case. finish_freezing()
6335 * would have taken care of Undoing the changes done for freeze. */
6338 offset_attr
= nl_msg_start_nested(
6339 ctx
->odp_actions
, OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL
);
6341 mf_write_subfield_flow(&check_pkt_larger
->dst
, &value
, &ctx
->xin
->flow
);
6342 do_xlate_actions(remaining_acts
, remaining_acts_len
, ctx
, true, false);
6343 if (!ctx
->freezing
) {
6344 xlate_action_set(ctx
);
6346 if (ctx
->freezing
) {
6347 finish_freezing(ctx
);
6349 nl_msg_end_nested(ctx
->odp_actions
, offset_attr
);
6350 nl_msg_end_nested(ctx
->odp_actions
, offset
);
6352 ofpbuf_uninit(&ctx
->action_set
);
6353 ctx
->action_set
= old_action_set
;
6354 ofpbuf_uninit(&ctx
->stack
);
6355 ctx
->stack
= old_stack
;
6356 ctx
->base_flow
= old_base
;
6357 ctx
->was_mpls
= old_was_mpls
;
6358 ctx
->conntracked
= old_conntracked
;
6359 ctx
->xin
->flow
= old_flow
;
6364 rewrite_flow_encap_ethernet(struct xlate_ctx
*ctx
,
6366 struct flow_wildcards
*wc
)
6368 wc
->masks
.packet_type
= OVS_BE32_MAX
;
6369 if (pt_ns(flow
->packet_type
) == OFPHTN_ETHERTYPE
) {
6370 /* Only adjust the packet_type and zero the dummy Ethernet addresses. */
6371 ovs_be16 ethertype
= pt_ns_type_be(flow
->packet_type
);
6372 flow
->packet_type
= htonl(PT_ETH
);
6373 flow
->dl_src
= eth_addr_zero
;
6374 flow
->dl_dst
= eth_addr_zero
;
6375 flow
->dl_type
= ethertype
;
6377 /* Error handling: drop packet. */
6378 xlate_report_debug(ctx
, OFT_ACTION
,
6379 "Dropping packet as encap(ethernet) is not "
6380 "supported for packet type ethernet.");
6381 ctx
->error
= XLATE_UNSUPPORTED_PACKET_TYPE
;
6385 /* For an MD2 NSH header returns a pointer to an ofpbuf with the encoded
6386 * MD2 TLVs provided as encap properties to the encap operation. This
6387 * will be stored as encap_data in the ctx and copied into the push_nsh
6388 * action at the next commit. */
6389 static struct ofpbuf
*
6390 rewrite_flow_push_nsh(struct xlate_ctx
*ctx
,
6391 const struct ofpact_encap
*encap
,
6393 struct flow_wildcards
*wc
)
6395 ovs_be32 packet_type
= flow
->packet_type
;
6396 const char *ptr
= (char *) encap
->props
;
6397 struct ofpbuf
*buf
= ofpbuf_new(NSH_CTX_HDRS_MAX_LEN
);
6398 uint8_t md_type
= NSH_M_TYPE1
;
6402 /* Scan the optional NSH encap TLV properties, if any. */
6403 for (i
= 0; i
< encap
->n_props
; i
++) {
6404 struct ofpact_ed_prop
*prop_ptr
=
6405 ALIGNED_CAST(struct ofpact_ed_prop
*, ptr
);
6406 if (prop_ptr
->prop_class
== OFPPPC_NSH
) {
6407 switch (prop_ptr
->type
) {
6408 case OFPPPT_PROP_NSH_MDTYPE
: {
6409 struct ofpact_ed_prop_nsh_md_type
*prop_md_type
=
6410 ALIGNED_CAST(struct ofpact_ed_prop_nsh_md_type
*,
6412 md_type
= prop_md_type
->md_type
;
6415 case OFPPPT_PROP_NSH_TLV
: {
6416 struct ofpact_ed_prop_nsh_tlv
*tlv_prop
=
6417 ALIGNED_CAST(struct ofpact_ed_prop_nsh_tlv
*,
6419 struct nsh_md2_tlv
*md2_ctx
=
6420 ofpbuf_put_uninit(buf
, sizeof(*md2_ctx
));
6421 md2_ctx
->md_class
= tlv_prop
->tlv_class
;
6422 md2_ctx
->type
= tlv_prop
->tlv_type
;
6423 md2_ctx
->length
= tlv_prop
->tlv_len
;
6424 size_t len
= ROUND_UP(md2_ctx
->length
, 4);
6425 size_t padding
= len
- md2_ctx
->length
;
6426 ofpbuf_put(buf
, tlv_prop
->data
, md2_ctx
->length
);
6427 ofpbuf_put_zeros(buf
, padding
);
6431 /* No other NSH encap properties defined yet. */
6435 ptr
+= ROUND_UP(prop_ptr
->len
, 8);
6437 if (buf
->size
== 0 || buf
->size
> NSH_CTX_HDRS_MAX_LEN
) {
6442 /* Determine the Next Protocol field for NSH header. */
6443 switch (ntohl(packet_type
)) {
6445 np
= NSH_P_ETHERNET
;
6457 /* Error handling: drop packet. */
6458 xlate_report_debug(ctx
, OFT_ACTION
,
6459 "Dropping packet as encap(nsh) is not "
6460 "supported for packet type (%d,0x%x)",
6461 pt_ns(packet_type
), pt_ns_type(packet_type
));
6462 ctx
->error
= XLATE_UNSUPPORTED_PACKET_TYPE
;
6465 /* Note that we have matched on packet_type! */
6466 wc
->masks
.packet_type
= OVS_BE32_MAX
;
6468 /* Reset all current flow packet headers. */
6469 memset(&flow
->dl_dst
, 0,
6470 sizeof(struct flow
) - offsetof(struct flow
, dl_dst
));
6472 /* Populate the flow with the new NSH header. */
6473 flow
->packet_type
= htonl(PT_NSH
);
6474 flow
->dl_type
= htons(ETH_TYPE_NSH
);
6475 flow
->nsh
.flags
= 0;
6478 flow
->nsh
.path_hdr
= htonl(255);
6480 if (md_type
== NSH_M_TYPE1
) {
6481 flow
->nsh
.mdtype
= NSH_M_TYPE1
;
6482 memset(flow
->nsh
.context
, 0, sizeof flow
->nsh
.context
);
6484 /* Drop any MD2 context TLVs. */
6488 } else if (md_type
== NSH_M_TYPE2
) {
6489 flow
->nsh
.mdtype
= NSH_M_TYPE2
;
6491 flow
->nsh
.mdtype
&= NSH_MDTYPE_MASK
;
6497 xlate_generic_encap_action(struct xlate_ctx
*ctx
,
6498 const struct ofpact_encap
*encap
)
6500 struct flow
*flow
= &ctx
->xin
->flow
;
6501 struct flow_wildcards
*wc
= ctx
->wc
;
6502 struct ofpbuf
*encap_data
= NULL
;
6504 /* Ensure that any pending actions on the inner packet are applied before
6505 * rewriting the flow */
6506 xlate_commit_actions(ctx
);
6508 /* Rewrite the flow to reflect the effect of pushing the new encap header. */
6509 switch (ntohl(encap
->new_pkt_type
)) {
6511 rewrite_flow_encap_ethernet(ctx
, flow
, wc
);
6514 encap_data
= rewrite_flow_push_nsh(ctx
, encap
, flow
, wc
);
6517 /* New packet type was checked during decoding. */
6522 /* The actual encap datapath action will be generated at next commit. */
6523 ctx
->pending_encap
= true;
6524 ctx
->encap_data
= encap_data
;
6528 /* Returns true if packet must be recirculated after decapsulation. */
6530 xlate_generic_decap_action(struct xlate_ctx
*ctx
,
6531 const struct ofpact_decap
*decap OVS_UNUSED
)
6533 struct flow
*flow
= &ctx
->xin
->flow
;
6535 /* Ensure that any pending actions on the current packet are applied
6536 * before generating the decap action. */
6537 xlate_commit_actions(ctx
);
6539 /* We assume for now that the new_pkt_type is PT_USE_NEXT_PROTO. */
6540 switch (ntohl(flow
->packet_type
)) {
6542 if (flow
->vlans
[0].tci
& htons(VLAN_CFI
)) {
6543 /* Error handling: drop packet. */
6544 xlate_report_debug(ctx
, OFT_ACTION
, "Dropping packet, cannot "
6545 "decap Ethernet if VLAN is present.");
6546 ctx
->error
= XLATE_UNSUPPORTED_PACKET_TYPE
;
6548 /* Just change the packet_type.
6549 * Delay generating pop_eth to the next commit. */
6550 flow
->packet_type
= htonl(PACKET_TYPE(OFPHTN_ETHERTYPE
,
6551 ntohs(flow
->dl_type
)));
6552 ctx
->wc
->masks
.dl_type
= OVS_BE16_MAX
;
6556 /* The pop_nsh action is generated at the commit executed as
6557 * part of freezing the ctx for recirculation. Here we just set
6558 * the new packet type based on the NSH next protocol field. */
6559 switch (flow
->nsh
.np
) {
6560 case NSH_P_ETHERNET
:
6561 flow
->packet_type
= htonl(PT_ETH
);
6564 flow
->packet_type
= htonl(PT_IPV4
);
6567 flow
->packet_type
= htonl(PT_IPV6
);
6570 flow
->packet_type
= htonl(PT_NSH
);
6573 /* Error handling: drop packet. */
6574 xlate_report_debug(ctx
, OFT_ACTION
,
6575 "Dropping packet as NSH next protocol %d "
6576 "is not supported", flow
->nsh
.np
);
6577 ctx
->error
= XLATE_UNSUPPORTED_PACKET_TYPE
;
6581 ctx
->wc
->masks
.nsh
.np
= UINT8_MAX
;
6582 ctx
->pending_decap
= true;
6583 /* Trigger recirculation. */
6586 /* Error handling: drop packet. */
6589 "Dropping packet as the decap() does not support "
6590 "packet type (%d,0x%x)",
6591 pt_ns(flow
->packet_type
), pt_ns_type(flow
->packet_type
));
6592 ctx
->error
= XLATE_UNSUPPORTED_PACKET_TYPE
;
6598 recirc_for_mpls(const struct ofpact
*a
, struct xlate_ctx
*ctx
)
6600 /* No need to recirculate if already exiting. */
6605 /* Do not consider recirculating unless the packet was previously MPLS. */
6606 if (!ctx
->was_mpls
) {
6610 /* Special case these actions, only recirculating if necessary.
6611 * This avoids the overhead of recirculation in common use-cases.
6615 /* Output actions do not require recirculation. */
6617 case OFPACT_OUTPUT_TRUNC
:
6618 case OFPACT_ENQUEUE
:
6619 case OFPACT_OUTPUT_REG
:
6620 /* Set actions that don't touch L3+ fields do not require recirculation. */
6621 case OFPACT_SET_VLAN_VID
:
6622 case OFPACT_SET_VLAN_PCP
:
6623 case OFPACT_SET_ETH_SRC
:
6624 case OFPACT_SET_ETH_DST
:
6625 case OFPACT_SET_TUNNEL
:
6626 case OFPACT_SET_QUEUE
:
6627 /* If actions of a group require recirculation that can be detected
6628 * when translating them. */
6632 /* Set field that don't touch L3+ fields don't require recirculation. */
6633 case OFPACT_SET_FIELD
:
6634 if (mf_is_l3_or_higher(ofpact_get_SET_FIELD(a
)->field
)) {
6639 /* For simplicity, recirculate in all other cases. */
6640 case OFPACT_CONTROLLER
:
6642 case OFPACT_STRIP_VLAN
:
6643 case OFPACT_PUSH_VLAN
:
6644 case OFPACT_SET_IPV4_SRC
:
6645 case OFPACT_SET_IPV4_DST
:
6646 case OFPACT_SET_IP_DSCP
:
6647 case OFPACT_SET_IP_ECN
:
6648 case OFPACT_SET_IP_TTL
:
6649 case OFPACT_SET_L4_SRC_PORT
:
6650 case OFPACT_SET_L4_DST_PORT
:
6651 case OFPACT_REG_MOVE
:
6652 case OFPACT_STACK_PUSH
:
6653 case OFPACT_STACK_POP
:
6654 case OFPACT_DEC_TTL
:
6655 case OFPACT_SET_MPLS_LABEL
:
6656 case OFPACT_SET_MPLS_TC
:
6657 case OFPACT_SET_MPLS_TTL
:
6658 case OFPACT_DEC_MPLS_TTL
:
6659 case OFPACT_PUSH_MPLS
:
6660 case OFPACT_POP_MPLS
:
6661 case OFPACT_POP_QUEUE
:
6662 case OFPACT_FIN_TIMEOUT
:
6663 case OFPACT_RESUBMIT
:
6665 case OFPACT_CONJUNCTION
:
6666 case OFPACT_MULTIPATH
:
6673 case OFPACT_DEC_NSH_TTL
:
6674 case OFPACT_UNROLL_XLATE
:
6676 case OFPACT_CT_CLEAR
:
6678 case OFPACT_DEBUG_RECIRC
:
6679 case OFPACT_DEBUG_SLOW
:
6681 case OFPACT_CLEAR_ACTIONS
:
6682 case OFPACT_WRITE_ACTIONS
:
6683 case OFPACT_WRITE_METADATA
:
6684 case OFPACT_GOTO_TABLE
:
6685 case OFPACT_CHECK_PKT_LARGER
:
6686 case OFPACT_DELETE_FIELD
:
6692 ctx_trigger_freeze(ctx
);
6696 xlate_ofpact_reg_move(struct xlate_ctx
*ctx
, const struct ofpact_reg_move
*a
)
6698 mf_subfield_copy(&a
->src
, &a
->dst
, &ctx
->xin
->flow
, ctx
->wc
);
6699 xlate_report_subfield(ctx
, &a
->dst
);
6703 xlate_ofpact_stack_pop(struct xlate_ctx
*ctx
, const struct ofpact_stack
*a
)
6705 if (nxm_execute_stack_pop(a
, &ctx
->xin
->flow
, ctx
->wc
, &ctx
->stack
)) {
6706 xlate_report_subfield(ctx
, &a
->subfield
);
6708 xlate_report_error(ctx
, "stack underflow");
6712 /* Restore translation context data that was stored earlier. */
6714 xlate_ofpact_unroll_xlate(struct xlate_ctx
*ctx
,
6715 const struct ofpact_unroll_xlate
*a
)
6717 ctx
->table_id
= a
->rule_table_id
;
6718 ctx
->rule_cookie
= a
->rule_cookie
;
6719 xlate_report(ctx
, OFT_THAW
, "restored state: table=%"PRIu8
", "
6720 "cookie=%#"PRIx64
, a
->rule_table_id
, a
->rule_cookie
);
6724 do_xlate_actions(const struct ofpact
*ofpacts
, size_t ofpacts_len
,
6725 struct xlate_ctx
*ctx
, bool is_last_action
,
6726 bool group_bucket_action
)
6728 struct flow_wildcards
*wc
= ctx
->wc
;
6729 struct flow
*flow
= &ctx
->xin
->flow
;
6730 const struct ofpact
*a
;
6732 /* dl_type already in the mask, not set below. */
6735 xlate_report(ctx
, OFT_ACTION
, "drop");
6739 OFPACT_FOR_EACH (a
, ofpacts
, ofpacts_len
) {
6740 struct ofpact_controller
*controller
;
6741 const struct ofpact_metadata
*metadata
;
6742 const struct ofpact_set_field
*set_field
;
6743 const struct mf_field
*mf
;
6744 bool last
= is_last_action
&& ofpact_last(a
, ofpacts
, ofpacts_len
)
6745 && ctx
->action_set
.size
;
6751 recirc_for_mpls(a
, ctx
);
6754 /* Check if need to store the remaining actions for later
6756 if (ctx
->freezing
) {
6757 freeze_unroll_actions(a
, ofpact_end(ofpacts
, ofpacts_len
),
6763 if (OVS_UNLIKELY(ctx
->xin
->trace
)) {
6764 struct ds s
= DS_EMPTY_INITIALIZER
;
6765 struct ofpact_format_params fp
= { .s
= &s
};
6766 ofpacts_format(a
, OFPACT_ALIGN(a
->len
), &fp
);
6767 xlate_report(ctx
, OFT_ACTION
, "%s", ds_cstr(&s
));
6773 xlate_output_action(ctx
, ofpact_get_OUTPUT(a
)->port
,
6774 ofpact_get_OUTPUT(a
)->max_len
, true, last
,
6775 false, group_bucket_action
);
6779 if (xlate_group_action(ctx
, ofpact_get_GROUP(a
)->group_id
, last
)) {
6780 /* Group could not be found. */
6782 /* XXX: Terminates action list translation, but does not
6783 * terminate the pipeline. */
6788 case OFPACT_CONTROLLER
:
6789 controller
= ofpact_get_CONTROLLER(a
);
6790 if (controller
->pause
) {
6791 ctx
->pause
= controller
;
6792 ctx_trigger_freeze(ctx
);
6795 xlate_controller_action(ctx
, controller
->max_len
,
6797 controller
->controller_id
,
6798 controller
->provider_meter_id
,
6799 controller
->userdata
,
6800 controller
->userdata_len
);
6804 case OFPACT_ENQUEUE
:
6805 memset(&wc
->masks
.skb_priority
, 0xff,
6806 sizeof wc
->masks
.skb_priority
);
6807 xlate_enqueue_action(ctx
, ofpact_get_ENQUEUE(a
), last
,
6808 group_bucket_action
);
6811 case OFPACT_SET_VLAN_VID
:
6812 wc
->masks
.vlans
[0].tci
|= htons(VLAN_VID_MASK
| VLAN_CFI
);
6813 if (flow
->vlans
[0].tci
& htons(VLAN_CFI
) ||
6814 ofpact_get_SET_VLAN_VID(a
)->push_vlan_if_needed
) {
6815 if (!flow
->vlans
[0].tpid
) {
6816 flow
->vlans
[0].tpid
= htons(ETH_TYPE_VLAN
);
6818 flow
->vlans
[0].tci
&= ~htons(VLAN_VID_MASK
);
6819 flow
->vlans
[0].tci
|=
6820 (htons(ofpact_get_SET_VLAN_VID(a
)->vlan_vid
) |
6825 case OFPACT_SET_VLAN_PCP
:
6826 wc
->masks
.vlans
[0].tci
|= htons(VLAN_PCP_MASK
| VLAN_CFI
);
6827 if (flow
->vlans
[0].tci
& htons(VLAN_CFI
) ||
6828 ofpact_get_SET_VLAN_PCP(a
)->push_vlan_if_needed
) {
6829 if (!flow
->vlans
[0].tpid
) {
6830 flow
->vlans
[0].tpid
= htons(ETH_TYPE_VLAN
);
6832 flow
->vlans
[0].tci
&= ~htons(VLAN_PCP_MASK
);
6833 flow
->vlans
[0].tci
|=
6834 htons((ofpact_get_SET_VLAN_PCP(a
)->vlan_pcp
6835 << VLAN_PCP_SHIFT
) | VLAN_CFI
);
6839 case OFPACT_STRIP_VLAN
:
6840 flow_pop_vlan(flow
, wc
);
6843 case OFPACT_PUSH_VLAN
:
6844 flow_push_vlan_uninit(flow
, wc
);
6845 flow
->vlans
[0].tpid
= ofpact_get_PUSH_VLAN(a
)->ethertype
;
6846 flow
->vlans
[0].tci
= htons(VLAN_CFI
);
6849 case OFPACT_SET_ETH_SRC
:
6850 WC_MASK_FIELD(wc
, dl_src
);
6851 flow
->dl_src
= ofpact_get_SET_ETH_SRC(a
)->mac
;
6854 case OFPACT_SET_ETH_DST
:
6855 WC_MASK_FIELD(wc
, dl_dst
);
6856 flow
->dl_dst
= ofpact_get_SET_ETH_DST(a
)->mac
;
6859 case OFPACT_SET_IPV4_SRC
:
6860 if (flow
->dl_type
== htons(ETH_TYPE_IP
)) {
6861 memset(&wc
->masks
.nw_src
, 0xff, sizeof wc
->masks
.nw_src
);
6862 flow
->nw_src
= ofpact_get_SET_IPV4_SRC(a
)->ipv4
;
6866 case OFPACT_SET_IPV4_DST
:
6867 if (flow
->dl_type
== htons(ETH_TYPE_IP
)) {
6868 memset(&wc
->masks
.nw_dst
, 0xff, sizeof wc
->masks
.nw_dst
);
6869 flow
->nw_dst
= ofpact_get_SET_IPV4_DST(a
)->ipv4
;
6873 case OFPACT_SET_IP_DSCP
:
6874 if (is_ip_any(flow
)) {
6875 wc
->masks
.nw_tos
|= IP_DSCP_MASK
;
6876 flow
->nw_tos
&= ~IP_DSCP_MASK
;
6877 flow
->nw_tos
|= ofpact_get_SET_IP_DSCP(a
)->dscp
;
6881 case OFPACT_SET_IP_ECN
:
6882 if (is_ip_any(flow
)) {
6883 wc
->masks
.nw_tos
|= IP_ECN_MASK
;
6884 flow
->nw_tos
&= ~IP_ECN_MASK
;
6885 flow
->nw_tos
|= ofpact_get_SET_IP_ECN(a
)->ecn
;
6889 case OFPACT_SET_IP_TTL
:
6890 if (is_ip_any(flow
)) {
6891 wc
->masks
.nw_ttl
= 0xff;
6892 flow
->nw_ttl
= ofpact_get_SET_IP_TTL(a
)->ttl
;
6896 case OFPACT_SET_L4_SRC_PORT
:
6897 if (is_ip_any(flow
) && !(flow
->nw_frag
& FLOW_NW_FRAG_LATER
)) {
6898 memset(&wc
->masks
.nw_proto
, 0xff, sizeof wc
->masks
.nw_proto
);
6899 memset(&wc
->masks
.tp_src
, 0xff, sizeof wc
->masks
.tp_src
);
6900 flow
->tp_src
= htons(ofpact_get_SET_L4_SRC_PORT(a
)->port
);
6904 case OFPACT_SET_L4_DST_PORT
:
6905 if (is_ip_any(flow
) && !(flow
->nw_frag
& FLOW_NW_FRAG_LATER
)) {
6906 memset(&wc
->masks
.nw_proto
, 0xff, sizeof wc
->masks
.nw_proto
);
6907 memset(&wc
->masks
.tp_dst
, 0xff, sizeof wc
->masks
.tp_dst
);
6908 flow
->tp_dst
= htons(ofpact_get_SET_L4_DST_PORT(a
)->port
);
6912 case OFPACT_RESUBMIT
:
6913 /* Freezing complicates resubmit. Some action in the flow
6914 * entry found by resubmit might trigger freezing. If that
6915 * happens, then we do not want to execute the resubmit again after
6916 * during thawing, so we want to skip back to the head of the loop
6917 * to avoid that, only adding any actions that follow the resubmit
6918 * to the frozen actions.
6920 xlate_ofpact_resubmit(ctx
, ofpact_get_RESUBMIT(a
), last
);
6923 case OFPACT_SET_TUNNEL
:
6924 flow
->tunnel
.tun_id
= htonll(ofpact_get_SET_TUNNEL(a
)->tun_id
);
6927 case OFPACT_SET_QUEUE
:
6928 memset(&wc
->masks
.skb_priority
, 0xff,
6929 sizeof wc
->masks
.skb_priority
);
6930 xlate_set_queue_action(ctx
, ofpact_get_SET_QUEUE(a
)->queue_id
);
6933 case OFPACT_POP_QUEUE
:
6934 memset(&wc
->masks
.skb_priority
, 0xff,
6935 sizeof wc
->masks
.skb_priority
);
6936 if (flow
->skb_priority
!= ctx
->orig_skb_priority
) {
6937 flow
->skb_priority
= ctx
->orig_skb_priority
;
6938 xlate_report(ctx
, OFT_DETAIL
, "queue = %#"PRIx32
,
6939 flow
->skb_priority
);
6943 case OFPACT_REG_MOVE
:
6944 xlate_ofpact_reg_move(ctx
, ofpact_get_REG_MOVE(a
));
6947 case OFPACT_SET_FIELD
:
6948 set_field
= ofpact_get_SET_FIELD(a
);
6949 mf
= set_field
->field
;
6951 /* Set the field only if the packet actually has it. */
6952 if (mf_are_prereqs_ok(mf
, flow
, wc
)) {
6953 mf_mask_field_masked(mf
, ofpact_set_field_mask(set_field
), wc
);
6954 mf_set_flow_value_masked(mf
, set_field
->value
,
6955 ofpact_set_field_mask(set_field
),
6958 xlate_report(ctx
, OFT_WARN
,
6959 "unmet prerequisites for %s, set_field ignored",
6965 case OFPACT_STACK_PUSH
:
6966 nxm_execute_stack_push(ofpact_get_STACK_PUSH(a
), flow
, wc
,
6970 case OFPACT_STACK_POP
:
6971 xlate_ofpact_stack_pop(ctx
, ofpact_get_STACK_POP(a
));
6974 case OFPACT_PUSH_MPLS
:
6975 compose_mpls_push_action(ctx
, ofpact_get_PUSH_MPLS(a
));
6978 case OFPACT_POP_MPLS
:
6979 compose_mpls_pop_action(ctx
, ofpact_get_POP_MPLS(a
)->ethertype
);
6982 case OFPACT_SET_MPLS_LABEL
:
6983 compose_set_mpls_label_action(
6984 ctx
, ofpact_get_SET_MPLS_LABEL(a
)->label
);
6987 case OFPACT_SET_MPLS_TC
:
6988 compose_set_mpls_tc_action(ctx
, ofpact_get_SET_MPLS_TC(a
)->tc
);
6991 case OFPACT_SET_MPLS_TTL
:
6992 compose_set_mpls_ttl_action(ctx
, ofpact_get_SET_MPLS_TTL(a
)->ttl
);
6995 case OFPACT_DEC_MPLS_TTL
:
6996 if (compose_dec_mpls_ttl_action(ctx
)) {
7001 case OFPACT_DEC_NSH_TTL
:
7002 if (compose_dec_nsh_ttl_action(ctx
)) {
7007 case OFPACT_DEC_TTL
:
7008 wc
->masks
.nw_ttl
= 0xff;
7009 if (compose_dec_ttl(ctx
, ofpact_get_DEC_TTL(a
))) {
7015 /* Nothing to do. */
7018 case OFPACT_MULTIPATH
:
7019 multipath_execute(ofpact_get_MULTIPATH(a
), flow
, wc
);
7020 xlate_report_subfield(ctx
, &ofpact_get_MULTIPATH(a
)->dst
);
7024 xlate_bundle_action(ctx
, ofpact_get_BUNDLE(a
), last
,
7025 group_bucket_action
);
7028 case OFPACT_OUTPUT_REG
:
7029 xlate_output_reg_action(ctx
, ofpact_get_OUTPUT_REG(a
), last
,
7030 group_bucket_action
);
7033 case OFPACT_OUTPUT_TRUNC
:
7034 xlate_output_trunc_action(ctx
, ofpact_get_OUTPUT_TRUNC(a
)->port
,
7035 ofpact_get_OUTPUT_TRUNC(a
)->max_len
, last
,
7036 group_bucket_action
);
7040 xlate_learn_action(ctx
, ofpact_get_LEARN(a
));
7043 case OFPACT_CONJUNCTION
:
7044 /* A flow with a "conjunction" action represents part of a special
7045 * kind of "set membership match". Such a flow should not actually
7046 * get executed, but it could via, say, a "packet-out", even though
7047 * that wouldn't be useful. Log it to help debugging. */
7048 xlate_report_error(ctx
, "executing no-op conjunction action");
7055 case OFPACT_UNROLL_XLATE
:
7056 xlate_ofpact_unroll_xlate(ctx
, ofpact_get_UNROLL_XLATE(a
));
7059 case OFPACT_FIN_TIMEOUT
:
7060 memset(&wc
->masks
.nw_proto
, 0xff, sizeof wc
->masks
.nw_proto
);
7061 xlate_fin_timeout(ctx
, ofpact_get_FIN_TIMEOUT(a
));
7064 case OFPACT_DELETE_FIELD
:
7065 xlate_delete_field(ctx
, flow
, ofpact_get_DELETE_FIELD(a
));
7068 case OFPACT_CLEAR_ACTIONS
:
7069 xlate_report_action_set(ctx
, "was");
7070 ofpbuf_clear(&ctx
->action_set
);
7071 ctx
->xin
->flow
.actset_output
= OFPP_UNSET
;
7072 ctx
->action_set_has_group
= false;
7075 case OFPACT_WRITE_ACTIONS
:
7076 xlate_write_actions(ctx
, ofpact_get_WRITE_ACTIONS(a
));
7077 xlate_report_action_set(ctx
, "is");
7080 case OFPACT_WRITE_METADATA
:
7081 metadata
= ofpact_get_WRITE_METADATA(a
);
7082 flow
->metadata
&= ~metadata
->mask
;
7083 flow
->metadata
|= metadata
->metadata
& metadata
->mask
;
7087 xlate_meter_action(ctx
, ofpact_get_METER(a
));
7090 case OFPACT_GOTO_TABLE
: {
7091 struct ofpact_goto_table
*ogt
= ofpact_get_GOTO_TABLE(a
);
7093 ovs_assert(ctx
->table_id
< ogt
->table_id
);
7095 xlate_table_action(ctx
, ctx
->xin
->flow
.in_port
.ofp_port
,
7096 ogt
->table_id
, true, true, false, last
,
7102 xlate_sample_action(ctx
, ofpact_get_SAMPLE(a
));
7106 compose_clone(ctx
, ofpact_get_CLONE(a
), last
);
7110 xlate_generic_encap_action(ctx
, ofpact_get_ENCAP(a
));
7113 case OFPACT_DECAP
: {
7114 bool recirc_needed
=
7115 xlate_generic_decap_action(ctx
, ofpact_get_DECAP(a
));
7116 if (!ctx
->error
&& recirc_needed
) {
7117 /* Recirculate for parsing of inner packet. */
7118 ctx_trigger_freeze(ctx
);
7119 /* Then continue with next action. */
7126 compose_conntrack_action(ctx
, ofpact_get_CT(a
), last
);
7129 case OFPACT_CT_CLEAR
:
7130 compose_ct_clear_action(ctx
);
7134 /* This will be processed by compose_conntrack_action(). */
7135 ctx
->ct_nat_action
= ofpact_get_NAT(a
);
7138 case OFPACT_DEBUG_RECIRC
:
7139 ctx_trigger_freeze(ctx
);
7143 case OFPACT_DEBUG_SLOW
:
7144 ctx
->xout
->slow
|= SLOW_ACTION
;
7147 case OFPACT_CHECK_PKT_LARGER
: {
7149 /* If this is last action, then there is no need to
7150 * translate the action. */
7153 const struct ofpact
*remaining_acts
= ofpact_next(a
);
7154 size_t remaining_acts_len
= ofpact_remaining_len(remaining_acts
,
7157 xlate_check_pkt_larger(ctx
, ofpact_get_CHECK_PKT_LARGER(a
),
7158 remaining_acts
, remaining_acts_len
);
7163 /* Check if need to store this and the remaining actions for later
7165 if (!ctx
->error
&& ctx
->exit
&& ctx_first_frozen_action(ctx
)) {
7166 freeze_unroll_actions(a
, ofpact_end(ofpacts
, ofpacts_len
), ctx
);
7173 xlate_in_init(struct xlate_in
*xin
, struct ofproto_dpif
*ofproto
,
7174 ovs_version_t version
, const struct flow
*flow
,
7175 ofp_port_t in_port
, struct rule_dpif
*rule
, uint16_t tcp_flags
,
7176 const struct dp_packet
*packet
, struct flow_wildcards
*wc
,
7177 struct ofpbuf
*odp_actions
)
7179 xin
->ofproto
= ofproto
;
7180 xin
->tables_version
= version
;
7182 xin
->upcall_flow
= flow
;
7183 xin
->flow
.in_port
.ofp_port
= in_port
;
7184 xin
->flow
.actset_output
= OFPP_UNSET
;
7185 xin
->packet
= packet
;
7186 xin
->allow_side_effects
= packet
!= NULL
;
7189 xin
->ofpacts
= NULL
;
7190 xin
->ofpacts_len
= 0;
7191 xin
->tcp_flags
= tcp_flags
;
7193 xin
->resubmit_stats
= NULL
;
7197 xin
->odp_actions
= odp_actions
;
7198 xin
->in_packet_out
= false;
7199 xin
->recirc_queue
= NULL
;
7200 xin
->xport_uuid
= UUID_ZERO
;
7202 /* Do recirc lookup. */
7203 xin
->frozen_state
= NULL
;
7204 if (flow
->recirc_id
) {
7205 const struct recirc_id_node
*node
7206 = recirc_id_node_find(flow
->recirc_id
);
7208 xin
->frozen_state
= &node
->state
;
7214 xlate_out_uninit(struct xlate_out
*xout
)
7217 recirc_refs_unref(&xout
->recircs
);
7221 static struct skb_priority_to_dscp
*
7222 get_skb_priority(const struct xport
*xport
, uint32_t skb_priority
)
7224 struct skb_priority_to_dscp
*pdscp
;
7227 hash
= hash_int(skb_priority
, 0);
7228 HMAP_FOR_EACH_IN_BUCKET (pdscp
, hmap_node
, hash
, &xport
->skb_priorities
) {
7229 if (pdscp
->skb_priority
== skb_priority
) {
7237 dscp_from_skb_priority(const struct xport
*xport
, uint32_t skb_priority
,
7240 struct skb_priority_to_dscp
*pdscp
= get_skb_priority(xport
, skb_priority
);
7241 *dscp
= pdscp
? pdscp
->dscp
: 0;
7242 return pdscp
!= NULL
;
7246 count_skb_priorities(const struct xport
*xport
)
7248 return hmap_count(&xport
->skb_priorities
);
7252 clear_skb_priorities(struct xport
*xport
)
7254 struct skb_priority_to_dscp
*pdscp
;
7256 HMAP_FOR_EACH_POP (pdscp
, hmap_node
, &xport
->skb_priorities
) {
7262 actions_output_to_local_port(const struct xlate_ctx
*ctx
)
7264 odp_port_t local_odp_port
= ofp_port_to_odp_port(ctx
->xbridge
, OFPP_LOCAL
);
7265 const struct nlattr
*a
;
7268 NL_ATTR_FOR_EACH_UNSAFE (a
, left
, ctx
->odp_actions
->data
,
7269 ctx
->odp_actions
->size
) {
7270 if (nl_attr_type(a
) == OVS_ACTION_ATTR_OUTPUT
7271 && nl_attr_get_odp_port(a
) == local_odp_port
) {
7278 #if defined(__linux__)
7279 /* Returns the maximum number of packets that the Linux kernel is willing to
7280 * queue up internally to certain kinds of software-implemented ports, or the
7281 * default (and rarely modified) value if it cannot be determined. */
7283 netdev_max_backlog(void)
7285 static struct ovsthread_once once
= OVSTHREAD_ONCE_INITIALIZER
;
7286 static int max_backlog
= 1000; /* The normal default value. */
7288 if (ovsthread_once_start(&once
)) {
7289 static const char filename
[] = "/proc/sys/net/core/netdev_max_backlog";
7293 stream
= fopen(filename
, "r");
7295 VLOG_INFO("%s: open failed (%s)", filename
, ovs_strerror(errno
));
7297 if (fscanf(stream
, "%d", &n
) != 1) {
7298 VLOG_WARN("%s: read error", filename
);
7299 } else if (n
<= 100) {
7300 VLOG_WARN("%s: unexpectedly small value %d", filename
, n
);
7306 ovsthread_once_done(&once
);
7308 VLOG_DBG("%s: using %d max_backlog", filename
, max_backlog
);
7314 /* Counts and returns the number of OVS_ACTION_ATTR_OUTPUT actions in
7317 count_output_actions(const struct ofpbuf
*odp_actions
)
7319 const struct nlattr
*a
;
7323 NL_ATTR_FOR_EACH_UNSAFE (a
, left
, odp_actions
->data
, odp_actions
->size
) {
7324 if ((a
->nla_type
== OVS_ACTION_ATTR_OUTPUT
) ||
7325 (a
->nla_type
== OVS_ACTION_ATTR_LB_OUTPUT
)) {
7331 #endif /* defined(__linux__) */
7333 /* Returns true if 'odp_actions' contains more output actions than the datapath
7334 * can reliably handle in one go. On Linux, this is the value of the
7335 * net.core.netdev_max_backlog sysctl, which limits the maximum number of
7336 * packets that the kernel is willing to queue up for processing while the
7337 * datapath is processing a set of actions. */
7339 too_many_output_actions(const struct ofpbuf
*odp_actions OVS_UNUSED
)
7342 return (odp_actions
->size
/ NL_A_U32_SIZE
> netdev_max_backlog()
7343 && count_output_actions(odp_actions
) > netdev_max_backlog());
7345 /* OSes other than Linux might have similar limits, but we don't know how
7346 * to determine them.*/
7352 xlate_wc_init(struct xlate_ctx
*ctx
)
7354 flow_wildcards_init_catchall(ctx
->wc
);
7356 /* Some fields we consider to always be examined. */
7357 WC_MASK_FIELD(ctx
->wc
, packet_type
);
7358 WC_MASK_FIELD(ctx
->wc
, in_port
);
7359 WC_MASK_FIELD(ctx
->wc
, dl_type
);
7360 if (is_ip_any(&ctx
->xin
->flow
)) {
7361 WC_MASK_FIELD_MASK(ctx
->wc
, nw_frag
, FLOW_NW_FRAG_MASK
);
7364 if (ctx
->xbridge
->support
.odp
.recirc
) {
7365 /* Always exactly match recirc_id when datapath supports
7367 WC_MASK_FIELD(ctx
->wc
, recirc_id
);
7370 if (ctx
->xbridge
->netflow
) {
7371 netflow_mask_wc(&ctx
->xin
->flow
, ctx
->wc
);
7374 tnl_wc_init(&ctx
->xin
->flow
, ctx
->wc
);
7378 xlate_wc_finish(struct xlate_ctx
*ctx
)
7382 /* Clear the metadata and register wildcard masks, because we won't
7383 * use non-header fields as part of the cache. */
7384 flow_wildcards_clear_non_packet_fields(ctx
->wc
);
7386 /* Wildcard Ethernet address fields if the original packet type was not
7389 * (The Ethertype field is used even when the original packet type is not
7391 if (ctx
->xin
->upcall_flow
->packet_type
!= htonl(PT_ETH
)) {
7392 ctx
->wc
->masks
.dl_dst
= eth_addr_zero
;
7393 ctx
->wc
->masks
.dl_src
= eth_addr_zero
;
7396 /* ICMPv4 and ICMPv6 have 8-bit "type" and "code" fields. struct flow
7397 * uses the low 8 bits of the 16-bit tp_src and tp_dst members to
7398 * represent these fields. The datapath interface, on the other hand,
7399 * represents them with just 8 bits each. This means that if the high
7400 * 8 bits of the masks for these fields somehow become set, then they
7401 * will get chopped off by a round trip through the datapath, and
7402 * revalidation will spot that as an inconsistency and delete the flow.
7403 * Avoid the problem here by making sure that only the low 8 bits of
7404 * either field can be unwildcarded for ICMP.
7406 if (is_icmpv4(&ctx
->xin
->flow
, NULL
) || is_icmpv6(&ctx
->xin
->flow
, NULL
)) {
7407 ctx
->wc
->masks
.tp_src
&= htons(UINT8_MAX
);
7408 ctx
->wc
->masks
.tp_dst
&= htons(UINT8_MAX
);
7410 /* VLAN_TCI CFI bit must be matched if any of the TCI is matched. */
7411 for (i
= 0; i
< FLOW_MAX_VLAN_HEADERS
; i
++) {
7412 if (ctx
->wc
->masks
.vlans
[i
].tci
) {
7413 ctx
->wc
->masks
.vlans
[i
].tci
|= htons(VLAN_CFI
);
7417 /* The classifier might return masks that match on tp_src and tp_dst even
7418 * for later fragments. This happens because there might be flows that
7419 * match on tp_src or tp_dst without matching on the frag bits, because
7420 * it is not a prerequisite for OpenFlow. Since it is a prerequisite for
7421 * datapath flows and since tp_src and tp_dst are always going to be 0,
7422 * wildcard the fields here. */
7423 if (ctx
->xin
->flow
.nw_frag
& FLOW_NW_FRAG_LATER
) {
7424 ctx
->wc
->masks
.tp_src
= 0;
7425 ctx
->wc
->masks
.tp_dst
= 0;
7428 /* Clear flow wildcard bits for fields which are not present
7429 * in the original packet header. These wildcards may get set
7430 * due to push/set_field actions. This results into frequent
7431 * invalidation of datapath flows by revalidator thread. */
7433 /* Clear mpls label wc bits if original packet is non-mpls. */
7434 if (!eth_type_mpls(ctx
->xin
->upcall_flow
->dl_type
)) {
7435 for (i
= 0; i
< FLOW_MAX_MPLS_LABELS
; i
++) {
7436 ctx
->wc
->masks
.mpls_lse
[i
] = 0;
7439 /* Clear vlan header wc bits if original packet does not have
7441 for (i
= 0; i
< FLOW_MAX_VLAN_HEADERS
; i
++) {
7442 if (!eth_type_vlan(ctx
->xin
->upcall_flow
->vlans
[i
].tpid
)) {
7443 ctx
->wc
->masks
.vlans
[i
].tpid
= 0;
7444 ctx
->wc
->masks
.vlans
[i
].tci
= 0;
7449 /* Translates the flow, actions, or rule in 'xin' into datapath actions in
7451 * The caller must take responsibility for eventually freeing 'xout', with
7452 * xlate_out_uninit().
7453 * Returns 'XLATE_OK' if translation was successful. In case of an error an
7454 * empty set of actions will be returned in 'xin->odp_actions' (if non-NULL),
7455 * so that most callers may ignore the return value and transparently install a
7456 * drop flow when the translation fails. */
7458 xlate_actions(struct xlate_in
*xin
, struct xlate_out
*xout
)
7460 *xout
= (struct xlate_out
) {
7462 .recircs
= RECIRC_REFS_EMPTY_INITIALIZER
,
7465 struct xlate_cfg
*xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
7466 struct xbridge
*xbridge
= xbridge_lookup(xcfg
, xin
->ofproto
);
7468 return XLATE_BRIDGE_NOT_FOUND
;
7471 struct flow
*flow
= &xin
->flow
;
7473 uint8_t stack_stub
[1024];
7474 uint64_t action_set_stub
[1024 / 8];
7475 uint64_t frozen_actions_stub
[1024 / 8];
7476 uint64_t actions_stub
[256 / 8];
7477 struct ofpbuf scratch_actions
= OFPBUF_STUB_INITIALIZER(actions_stub
);
7478 struct xlate_ctx ctx
= {
7482 .orig_tunnel_ipv6_dst
= flow_tnl_dst(&flow
->tunnel
),
7485 .stack
= OFPBUF_STUB_INITIALIZER(stack_stub
),
7489 : &(struct flow_wildcards
) { .masks
= { .dl_type
= 0 } }),
7490 .odp_actions
= xin
->odp_actions
? xin
->odp_actions
: &scratch_actions
,
7492 .depth
= xin
->depth
,
7493 .resubmits
= xin
->resubmits
,
7494 .in_action_set
= false,
7495 .in_packet_out
= xin
->in_packet_out
,
7496 .pending_encap
= false,
7497 .pending_decap
= false,
7501 .rule_cookie
= OVS_BE64_MAX
,
7502 .orig_skb_priority
= flow
->skb_priority
,
7503 .sflow_n_outputs
= 0,
7504 .sflow_odp_port
= 0,
7505 .nf_output_iface
= NF_OUT_DROP
,
7511 .recirc_update_dp_hash
= false,
7512 .frozen_actions
= OFPBUF_STUB_INITIALIZER(frozen_actions_stub
),
7516 .conntracked
= false,
7518 .ct_nat_action
= NULL
,
7520 .action_set_has_group
= false,
7521 .action_set
= OFPBUF_STUB_INITIALIZER(action_set_stub
),
7524 /* 'base_flow' reflects the packet as it came in, but we need it to reflect
7525 * the packet as the datapath will treat it for output actions. Our
7526 * datapath doesn't retain tunneling information without us re-setting
7527 * it, so clear the tunnel data.
7530 memset(&ctx
.base_flow
.tunnel
, 0, sizeof ctx
.base_flow
.tunnel
);
7532 ofpbuf_reserve(ctx
.odp_actions
, NL_A_U32_SIZE
);
7533 xlate_wc_init(&ctx
);
7535 COVERAGE_INC(xlate_actions
);
7537 xin
->trace
= xlate_report(&ctx
, OFT_BRIDGE
, "bridge(\"%s\")",
7539 if (xin
->frozen_state
) {
7540 const struct frozen_state
*state
= xin
->frozen_state
;
7542 struct ovs_list
*old_trace
= xin
->trace
;
7543 xin
->trace
= xlate_report(&ctx
, OFT_THAW
, "thaw");
7545 if (xin
->ofpacts_len
> 0 || ctx
.rule
) {
7546 xlate_report_error(&ctx
, "Recirculation conflict (%s)!",
7547 xin
->ofpacts_len
? "actions" : "rule");
7548 ctx
.error
= XLATE_RECIRCULATION_CONFLICT
;
7552 /* Set the bridge for post-recirculation processing if needed. */
7553 if (!uuid_equals(&ctx
.xbridge
->ofproto
->uuid
, &state
->ofproto_uuid
)) {
7554 const struct xbridge
*new_bridge
7555 = xbridge_lookup_by_uuid(xcfg
, &state
->ofproto_uuid
);
7557 if (OVS_UNLIKELY(!new_bridge
)) {
7558 /* Drop the packet if the bridge cannot be found. */
7559 xlate_report_error(&ctx
, "Frozen bridge no longer exists.");
7560 ctx
.error
= XLATE_BRIDGE_NOT_FOUND
;
7561 xin
->trace
= old_trace
;
7564 ctx
.xbridge
= new_bridge
;
7565 /* The bridge is now known so obtain its table version. */
7566 ctx
.xin
->tables_version
7567 = ofproto_dpif_get_tables_version(ctx
.xbridge
->ofproto
);
7570 /* Set the thawed table id. Note: A table lookup is done only if there
7571 * are no frozen actions. */
7572 ctx
.table_id
= state
->table_id
;
7573 xlate_report(&ctx
, OFT_THAW
,
7574 "Resuming from table %"PRIu8
, ctx
.table_id
);
7576 ctx
.conntracked
= state
->conntracked
;
7577 if (!state
->conntracked
) {
7578 clear_conntrack(&ctx
);
7581 /* Restore pipeline metadata. May change flow's in_port and other
7582 * metadata to the values that existed when freezing was triggered. */
7583 frozen_metadata_to_flow(&ctx
.xbridge
->ofproto
->up
,
7584 &state
->metadata
, flow
);
7586 /* Restore stack, if any. */
7588 ofpbuf_put(&ctx
.stack
, state
->stack
, state
->stack_size
);
7591 /* Restore mirror state. */
7592 ctx
.mirrors
= state
->mirrors
;
7594 /* Restore action set, if any. */
7595 if (state
->action_set_len
) {
7596 xlate_report_actions(&ctx
, OFT_THAW
, "Restoring action set",
7597 state
->action_set
, state
->action_set_len
);
7599 flow
->actset_output
= OFPP_UNSET
;
7600 xlate_write_actions__(&ctx
, state
->action_set
,
7601 state
->action_set_len
);
7604 /* Restore frozen actions. If there are no actions, processing will
7605 * start with a lookup in the table set above. */
7606 xin
->ofpacts
= state
->ofpacts
;
7607 xin
->ofpacts_len
= state
->ofpacts_len
;
7608 if (state
->ofpacts_len
) {
7609 xlate_report_actions(&ctx
, OFT_THAW
, "Restoring actions",
7610 xin
->ofpacts
, xin
->ofpacts_len
);
7613 xin
->trace
= old_trace
;
7614 } else if (OVS_UNLIKELY(flow
->recirc_id
)) {
7615 xlate_report_error(&ctx
,
7616 "Recirculation context not found for ID %"PRIx32
,
7618 ctx
.error
= XLATE_NO_RECIRCULATION_CONTEXT
;
7622 /* Tunnel metadata in udpif format must be normalized before translation. */
7623 if (flow
->tunnel
.flags
& FLOW_TNL_F_UDPIF
) {
7624 const struct tun_table
*tun_tab
= ofproto_get_tun_tab(
7625 &ctx
.xbridge
->ofproto
->up
);
7628 err
= tun_metadata_from_geneve_udpif(tun_tab
, &xin
->upcall_flow
->tunnel
,
7629 &xin
->upcall_flow
->tunnel
,
7632 xlate_report_error(&ctx
, "Invalid Geneve tunnel metadata");
7633 ctx
.error
= XLATE_INVALID_TUNNEL_METADATA
;
7636 } else if (!flow
->tunnel
.metadata
.tab
) {
7637 /* If the original flow did not come in on a tunnel, then it won't have
7638 * FLOW_TNL_F_UDPIF set. However, we still need to have a metadata
7639 * table in case we generate tunnel actions. */
7640 flow
->tunnel
.metadata
.tab
= ofproto_get_tun_tab(
7641 &ctx
.xbridge
->ofproto
->up
);
7643 ctx
.wc
->masks
.tunnel
.metadata
.tab
= flow
->tunnel
.metadata
.tab
;
7645 /* Get the proximate input port of the packet. (If xin->frozen_state,
7646 * flow->in_port is the ultimate input port of the packet.) */
7647 struct xport
*in_port
= get_ofp_port(xbridge
,
7648 ctx
.base_flow
.in_port
.ofp_port
);
7649 if (in_port
&& !in_port
->peer
) {
7650 ctx
.xin
->xport_uuid
= in_port
->uuid
;
7653 if (flow
->packet_type
!= htonl(PT_ETH
) && in_port
&&
7654 in_port
->pt_mode
== NETDEV_PT_LEGACY_L3
&& ctx
.table_id
== 0) {
7655 /* Add dummy Ethernet header to non-L2 packet if it's coming from a
7656 * L3 port. So all packets will be L2 packets for lookup.
7657 * The dl_type has already been set from the packet_type. */
7658 flow
->packet_type
= htonl(PT_ETH
);
7659 flow
->dl_src
= eth_addr_zero
;
7660 flow
->dl_dst
= eth_addr_zero
;
7661 ctx
.pending_encap
= true;
7664 if (!xin
->ofpacts
&& !ctx
.rule
) {
7665 ctx
.rule
= rule_dpif_lookup_from_table(
7666 ctx
.xbridge
->ofproto
, ctx
.xin
->tables_version
, flow
, ctx
.wc
,
7667 ctx
.xin
->resubmit_stats
, &ctx
.table_id
,
7668 flow
->in_port
.ofp_port
, true, true, ctx
.xin
->xcache
);
7669 if (ctx
.xin
->resubmit_stats
) {
7670 rule_dpif_credit_stats(ctx
.rule
, ctx
.xin
->resubmit_stats
, false);
7672 if (ctx
.xin
->xcache
) {
7673 struct xc_entry
*entry
;
7675 entry
= xlate_cache_add_entry(ctx
.xin
->xcache
, XC_RULE
);
7676 entry
->rule
= ctx
.rule
;
7677 ofproto_rule_ref(&ctx
.rule
->up
);
7680 xlate_report_table(&ctx
, ctx
.rule
, ctx
.table_id
);
7683 /* Tunnel stats only for not-thawed packets. */
7684 if (!xin
->frozen_state
&& in_port
&& in_port
->is_tunnel
) {
7685 if (ctx
.xin
->resubmit_stats
) {
7686 netdev_vport_inc_rx(in_port
->netdev
, ctx
.xin
->resubmit_stats
);
7688 bfd_account_rx(in_port
->bfd
, ctx
.xin
->resubmit_stats
);
7691 if (ctx
.xin
->xcache
) {
7692 struct xc_entry
*entry
;
7694 entry
= xlate_cache_add_entry(ctx
.xin
->xcache
, XC_NETDEV
);
7695 entry
->dev
.rx
= netdev_ref(in_port
->netdev
);
7696 entry
->dev
.bfd
= bfd_ref(in_port
->bfd
);
7700 if (!xin
->frozen_state
&& process_special(&ctx
, in_port
)) {
7701 /* process_special() did all the processing for this packet.
7703 * We do not perform special processing on thawed packets, since that
7704 * was done before they were frozen and should not be redone. */
7705 mirror_ingress_packet(&ctx
);
7706 } else if (in_port
&& in_port
->xbundle
7707 && xbundle_mirror_out(xbridge
, in_port
->xbundle
)) {
7708 xlate_report_error(&ctx
, "dropping packet received on port "
7709 "%s, which is reserved exclusively for mirroring",
7710 in_port
->xbundle
->name
);
7712 /* Sampling is done on initial reception; don't redo after thawing. */
7713 unsigned int user_cookie_offset
= 0;
7714 if (!xin
->frozen_state
) {
7715 user_cookie_offset
= compose_sflow_action(&ctx
);
7716 compose_ipfix_action(&ctx
, ODPP_NONE
);
7718 size_t sample_actions_len
= ctx
.odp_actions
->size
;
7719 bool ecn_drop
= !tnl_process_ecn(flow
);
7722 && (!in_port
|| may_receive(in_port
, &ctx
))) {
7723 const struct ofpact
*ofpacts
;
7727 ofpacts
= xin
->ofpacts
;
7728 ofpacts_len
= xin
->ofpacts_len
;
7729 } else if (ctx
.rule
) {
7730 const struct rule_actions
*actions
7731 = rule_get_actions(&ctx
.rule
->up
);
7732 ofpacts
= actions
->ofpacts
;
7733 ofpacts_len
= actions
->ofpacts_len
;
7734 ctx
.rule_cookie
= ctx
.rule
->up
.flow_cookie
;
7739 mirror_ingress_packet(&ctx
);
7740 do_xlate_actions(ofpacts
, ofpacts_len
, &ctx
, true, false);
7745 /* We've let OFPP_NORMAL and the learning action look at the
7746 * packet, so cancel all actions and freezing if forwarding is
7748 if (in_port
&& (!xport_stp_forward_state(in_port
) ||
7749 !xport_rstp_forward_state(in_port
))) {
7750 ctx
.odp_actions
->size
= sample_actions_len
;
7751 ctx_cancel_freeze(&ctx
);
7752 ofpbuf_clear(&ctx
.action_set
);
7753 ctx
.error
= XLATE_FORWARDING_DISABLED
;
7756 if (!ctx
.freezing
) {
7757 xlate_action_set(&ctx
);
7760 finish_freezing(&ctx
);
7762 } else if (ecn_drop
) {
7763 ctx
.error
= XLATE_CONGESTION_DROP
;
7766 /* Output only fully processed packets. */
7768 && xbridge
->has_in_band
7769 && in_band_must_output_to_local_port(flow
)
7770 && !actions_output_to_local_port(&ctx
)) {
7771 WC_MASK_FIELD(ctx
.wc
, nw_proto
);
7772 WC_MASK_FIELD(ctx
.wc
, tp_src
);
7773 WC_MASK_FIELD(ctx
.wc
, tp_dst
);
7774 WC_MASK_FIELD(ctx
.wc
, dl_type
);
7775 xlate_report(&ctx
, OFT_DETAIL
, "outputting DHCP packet "
7776 "to local port for in-band control");
7777 compose_output_action(&ctx
, OFPP_LOCAL
, NULL
, false, false);
7780 if (user_cookie_offset
) {
7781 fix_sflow_action(&ctx
, user_cookie_offset
);
7785 if (nl_attr_oversized(ctx
.odp_actions
->size
)) {
7786 /* These datapath actions are too big for a Netlink attribute, so we
7787 * can't hand them to the kernel directly. dpif_execute() can execute
7788 * them one by one with help, so just mark the result as SLOW_ACTION to
7789 * prevent the flow from being installed. */
7790 COVERAGE_INC(xlate_actions_oversize
);
7791 ctx
.xout
->slow
|= SLOW_ACTION
;
7792 } else if (too_many_output_actions(ctx
.odp_actions
)) {
7793 COVERAGE_INC(xlate_actions_too_many_output
);
7794 ctx
.xout
->slow
|= SLOW_ACTION
;
7797 /* Update NetFlow for non-frozen traffic. */
7798 if (xbridge
->netflow
&& !xin
->frozen_state
) {
7799 if (ctx
.xin
->resubmit_stats
) {
7800 netflow_flow_update(xbridge
->netflow
, flow
,
7801 ctx
.nf_output_iface
,
7802 ctx
.xin
->resubmit_stats
);
7804 if (ctx
.xin
->xcache
) {
7805 struct xc_entry
*entry
;
7807 entry
= xlate_cache_add_entry(ctx
.xin
->xcache
, XC_NETFLOW
);
7808 entry
->nf
.netflow
= netflow_ref(xbridge
->netflow
);
7809 entry
->nf
.flow
= xmemdup(flow
, sizeof *flow
);
7810 entry
->nf
.iface
= ctx
.nf_output_iface
;
7814 /* Translate tunnel metadata masks to udpif format if necessary. */
7815 if (xin
->upcall_flow
->tunnel
.flags
& FLOW_TNL_F_UDPIF
) {
7816 if (ctx
.wc
->masks
.tunnel
.metadata
.present
.map
) {
7817 const struct flow_tnl
*upcall_tnl
= &xin
->upcall_flow
->tunnel
;
7818 struct geneve_opt opts
[TLV_TOT_OPT_SIZE
/
7819 sizeof(struct geneve_opt
)];
7821 tun_metadata_to_geneve_udpif_mask(&flow
->tunnel
,
7822 &ctx
.wc
->masks
.tunnel
,
7823 upcall_tnl
->metadata
.opts
.gnv
,
7824 upcall_tnl
->metadata
.present
.len
,
7826 memset(&ctx
.wc
->masks
.tunnel
.metadata
, 0,
7827 sizeof ctx
.wc
->masks
.tunnel
.metadata
);
7828 memcpy(&ctx
.wc
->masks
.tunnel
.metadata
.opts
.gnv
, opts
,
7829 upcall_tnl
->metadata
.present
.len
);
7831 ctx
.wc
->masks
.tunnel
.metadata
.present
.len
= 0xff;
7832 ctx
.wc
->masks
.tunnel
.metadata
.tab
= NULL
;
7833 ctx
.wc
->masks
.tunnel
.flags
|= FLOW_TNL_F_UDPIF
;
7834 } else if (!xin
->upcall_flow
->tunnel
.metadata
.tab
) {
7835 /* If we didn't have options in UDPIF format and didn't have an existing
7836 * metadata table, then it means that there were no options at all when
7837 * we started processing and any wildcards we picked up were from
7838 * action generation. Without options on the incoming packet, wildcards
7839 * aren't meaningful. To avoid them possibly getting misinterpreted,
7840 * just clear everything. */
7841 if (ctx
.wc
->masks
.tunnel
.metadata
.present
.map
) {
7842 memset(&ctx
.wc
->masks
.tunnel
.metadata
, 0,
7843 sizeof ctx
.wc
->masks
.tunnel
.metadata
);
7845 ctx
.wc
->masks
.tunnel
.metadata
.tab
= NULL
;
7849 xlate_wc_finish(&ctx
);
7852 /* Reset the table to what it was when we came in. If we only fetched
7853 * it locally, then it has no meaning outside of flow translation. */
7854 flow
->tunnel
.metadata
.tab
= xin
->upcall_flow
->tunnel
.metadata
.tab
;
7856 ofpbuf_uninit(&ctx
.stack
);
7857 ofpbuf_uninit(&ctx
.action_set
);
7858 ofpbuf_uninit(&ctx
.frozen_actions
);
7859 ofpbuf_uninit(&scratch_actions
);
7860 ofpbuf_delete(ctx
.encap_data
);
7862 /* Make sure we return a "drop flow" in case of an error. */
7865 if (xin
->odp_actions
) {
7866 ofpbuf_clear(xin
->odp_actions
);
7870 /* Install drop action if datapath supports explicit drop action. */
7871 if (xin
->odp_actions
&& !xin
->odp_actions
->size
&&
7872 ovs_explicit_drop_action_supported(ctx
.xbridge
->ofproto
)) {
7873 put_drop_action(xin
->odp_actions
, ctx
.error
);
7876 /* Since congestion drop and forwarding drop are not exactly
7877 * translation error, we are resetting the translation error.
7879 if (ctx
.error
== XLATE_CONGESTION_DROP
||
7880 ctx
.error
== XLATE_FORWARDING_DISABLED
) {
7881 ctx
.error
= XLATE_OK
;
7888 xlate_resume(struct ofproto_dpif
*ofproto
,
7889 const struct ofputil_packet_in_private
*pin
,
7890 struct ofpbuf
*odp_actions
,
7891 enum slow_path_reason
*slow
,
7893 struct xlate_cache
*xcache
)
7895 struct dp_packet packet
;
7896 dp_packet_use_const(&packet
, pin
->base
.packet
,
7897 pin
->base
.packet_len
);
7899 pkt_metadata_from_flow(&packet
.md
, &pin
->base
.flow_metadata
.flow
);
7900 flow_extract(&packet
, flow
);
7902 struct xlate_in xin
;
7903 xlate_in_init(&xin
, ofproto
, ofproto_dpif_get_tables_version(ofproto
),
7904 flow
, 0, NULL
, ntohs(flow
->tcp_flags
),
7905 &packet
, NULL
, odp_actions
);
7906 xin
.xcache
= xcache
;
7908 struct ofpact_note noop
;
7909 ofpact_init_NOTE(&noop
);
7912 bool any_actions
= pin
->actions_len
> 0;
7913 struct frozen_state state
= {
7914 .table_id
= 0, /* Not the table where NXAST_PAUSE was executed. */
7915 .ofproto_uuid
= pin
->bridge
,
7916 .stack
= pin
->stack
,
7917 .stack_size
= pin
->stack_size
,
7918 .mirrors
= pin
->mirrors
,
7919 .conntracked
= pin
->conntracked
,
7920 .xport_uuid
= UUID_ZERO
,
7922 /* When there are no actions, xlate_actions() will search the flow
7923 * table. We don't want it to do that (we want it to resume), so
7924 * supply a no-op action if there aren't any.
7926 * (We can't necessarily avoid translating actions entirely if there
7927 * aren't any actions, because there might be some finishing-up to do
7928 * at the end of the pipeline, and we don't check for those
7930 .ofpacts
= any_actions
? pin
->actions
: &noop
.ofpact
,
7931 .ofpacts_len
= any_actions
? pin
->actions_len
: sizeof noop
,
7933 .action_set
= pin
->action_set
,
7934 .action_set_len
= pin
->action_set_len
,
7936 frozen_metadata_from_flow(&state
.metadata
,
7937 &pin
->base
.flow_metadata
.flow
);
7938 xin
.frozen_state
= &state
;
7940 struct xlate_out xout
;
7941 enum xlate_error error
= xlate_actions(&xin
, &xout
);
7943 xlate_out_uninit(&xout
);
7945 /* xlate_actions() can generate a number of errors, but only
7946 * XLATE_BRIDGE_NOT_FOUND really stands out to me as one that we should be
7947 * sure to report over OpenFlow. The others could come up in packet-outs
7948 * or regular flow translation and I don't think that it's going to be too
7949 * useful to report them to the controller. */
7950 return error
== XLATE_BRIDGE_NOT_FOUND
? OFPERR_NXR_STALE
: 0;
7953 /* Sends 'packet' out 'ofport'. If 'port' is a tunnel and that tunnel type
7954 * supports a notion of an OAM flag, sets it if 'oam' is true.
7955 * May modify 'packet'.
7956 * Returns 0 if successful, otherwise a positive errno value. */
7958 xlate_send_packet(const struct ofport_dpif
*ofport
, bool oam
,
7959 struct dp_packet
*packet
)
7961 struct xlate_cfg
*xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
7962 struct xport
*xport
;
7963 uint64_t ofpacts_stub
[1024 / 8];
7964 struct ofpbuf ofpacts
;
7967 ofpbuf_use_stack(&ofpacts
, ofpacts_stub
, sizeof ofpacts_stub
);
7968 /* Use OFPP_NONE as the in_port to avoid special packet processing. */
7969 flow_extract(packet
, &flow
);
7970 flow
.in_port
.ofp_port
= OFPP_NONE
;
7972 xport
= xport_lookup(xcfg
, ofport
);
7978 const ovs_be16 flag
= htons(NX_TUN_FLAG_OAM
);
7979 ofpact_put_set_field(&ofpacts
, mf_from_id(MFF_TUN_FLAGS
),
7983 ofpact_put_OUTPUT(&ofpacts
)->port
= xport
->ofp_port
;
7985 /* Actions here are not referring to anything versionable (flow tables or
7986 * groups) so we don't need to worry about the version here. */
7987 return ofproto_dpif_execute_actions(xport
->xbridge
->ofproto
,
7988 OVS_VERSION_MAX
, &flow
, NULL
,
7989 ofpacts
.data
, ofpacts
.size
, packet
);
7993 xlate_mac_learning_update(const struct ofproto_dpif
*ofproto
,
7994 ofp_port_t in_port
, struct eth_addr dl_src
,
7995 int vlan
, bool is_grat_arp
)
7997 struct xlate_cfg
*xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
7998 struct xbridge
*xbridge
;
7999 struct xbundle
*xbundle
;
8001 xbridge
= xbridge_lookup(xcfg
, ofproto
);
8006 xbundle
= lookup_input_bundle__(xbridge
, in_port
, NULL
);
8011 update_learning_table__(xbridge
, xbundle
, dl_src
, vlan
, is_grat_arp
);
8015 xlate_set_support(const struct ofproto_dpif
*ofproto
,
8016 const struct dpif_backer_support
*support
)
8018 struct xlate_cfg
*xcfg
= ovsrcu_get(struct xlate_cfg
*, &xcfgp
);
8019 struct xbridge
*xbridge
= xbridge_lookup(xcfg
, ofproto
);
8022 xbridge
->support
= *support
;