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9583bc14 EJ |
1 | /* Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc. |
2 | * | |
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: | |
6 | * | |
7 | * http://www.apache.org/licenses/LICENSE-2.0 | |
8 | * | |
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. */ | |
14 | ||
15 | #include <config.h> | |
16 | ||
17 | #include "ofproto/ofproto-dpif-xlate.h" | |
18 | ||
db7d4e46 | 19 | #include "bfd.h" |
9583bc14 EJ |
20 | #include "bitmap.h" |
21 | #include "bond.h" | |
22 | #include "bundle.h" | |
23 | #include "byte-order.h" | |
db7d4e46 | 24 | #include "cfm.h" |
9583bc14 EJ |
25 | #include "connmgr.h" |
26 | #include "coverage.h" | |
27 | #include "dpif.h" | |
28 | #include "dynamic-string.h" | |
f7f1ea29 | 29 | #include "in-band.h" |
db7d4e46 | 30 | #include "lacp.h" |
9583bc14 | 31 | #include "learn.h" |
46c88433 | 32 | #include "list.h" |
9583bc14 EJ |
33 | #include "mac-learning.h" |
34 | #include "meta-flow.h" | |
35 | #include "multipath.h" | |
36 | #include "netdev-vport.h" | |
37 | #include "netlink.h" | |
38 | #include "nx-match.h" | |
39 | #include "odp-execute.h" | |
40 | #include "ofp-actions.h" | |
41 | #include "ofproto/ofproto-dpif-ipfix.h" | |
ec7ceaed | 42 | #include "ofproto/ofproto-dpif-mirror.h" |
9583bc14 EJ |
43 | #include "ofproto/ofproto-dpif-sflow.h" |
44 | #include "ofproto/ofproto-dpif.h" | |
45 | #include "tunnel.h" | |
46 | #include "vlog.h" | |
47 | ||
46c88433 | 48 | COVERAGE_DEFINE(xlate_actions); |
9583bc14 EJ |
49 | |
50 | VLOG_DEFINE_THIS_MODULE(ofproto_dpif_xlate); | |
51 | ||
8a553e9a EJ |
52 | /* Maximum depth of flow table recursion (due to resubmit actions) in a |
53 | * flow translation. */ | |
54 | #define MAX_RESUBMIT_RECURSION 64 | |
55 | ||
46c88433 EJ |
56 | struct xbridge { |
57 | struct hmap_node hmap_node; /* Node in global 'xbridges' map. */ | |
58 | struct ofproto_dpif *ofproto; /* Key in global 'xbridges' map. */ | |
59 | ||
60 | struct list xbundles; /* Owned xbundles. */ | |
61 | struct hmap xports; /* Indexed by ofp_port. */ | |
62 | ||
63 | char *name; /* Name used in log messages. */ | |
64 | struct mac_learning *ml; /* Mac learning handle. */ | |
65 | struct mbridge *mbridge; /* Mirroring. */ | |
66 | struct dpif_sflow *sflow; /* SFlow handle, or null. */ | |
67 | struct dpif_ipfix *ipfix; /* Ipfix handle, or null. */ | |
68 | ||
69 | enum ofp_config_flags frag; /* Fragmentation handling. */ | |
70 | bool has_stp; /* Bridge runs stp? */ | |
71 | bool has_netflow; /* Bridge runs netflow? */ | |
72 | bool has_in_band; /* Bridge has in band control? */ | |
73 | bool forward_bpdu; /* Bridge forwards STP BPDUs? */ | |
74 | }; | |
75 | ||
76 | struct xbundle { | |
77 | struct hmap_node hmap_node; /* In global 'xbundles' map. */ | |
78 | struct ofbundle *ofbundle; /* Key in global 'xbundles' map. */ | |
79 | ||
80 | struct list list_node; /* In parent 'xbridges' list. */ | |
81 | struct xbridge *xbridge; /* Parent xbridge. */ | |
82 | ||
83 | struct list xports; /* Contains "struct xport"s. */ | |
84 | ||
85 | char *name; /* Name used in log messages. */ | |
86 | struct bond *bond; /* Nonnull iff more than one port. */ | |
87 | struct lacp *lacp; /* LACP handle or null. */ | |
88 | ||
89 | enum port_vlan_mode vlan_mode; /* VLAN mode. */ | |
90 | int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */ | |
91 | unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1. | |
92 | * NULL if all VLANs are trunked. */ | |
93 | bool use_priority_tags; /* Use 802.1p tag for frames in VLAN 0? */ | |
94 | bool floodable; /* No port has OFPUTIL_PC_NO_FLOOD set? */ | |
95 | }; | |
96 | ||
97 | struct xport { | |
98 | struct hmap_node hmap_node; /* Node in global 'xports' map. */ | |
99 | struct ofport_dpif *ofport; /* Key in global 'xports map. */ | |
100 | ||
101 | struct hmap_node ofp_node; /* Node in parent xbridge 'xports' map. */ | |
102 | ofp_port_t ofp_port; /* Key in parent xbridge 'xports' map. */ | |
103 | ||
104 | odp_port_t odp_port; /* Datapath port number or ODPP_NONE. */ | |
105 | ||
106 | struct list bundle_node; /* In parent xbundle (if it exists). */ | |
107 | struct xbundle *xbundle; /* Parent xbundle or null. */ | |
108 | ||
109 | struct netdev *netdev; /* 'ofport''s netdev. */ | |
110 | ||
111 | struct xbridge *xbridge; /* Parent bridge. */ | |
112 | struct xport *peer; /* Patch port peer or null. */ | |
113 | ||
114 | enum ofputil_port_config config; /* OpenFlow port configuration. */ | |
115 | enum stp_state stp_state; /* STP_DISABLED if STP not in use. */ | |
116 | ||
117 | bool may_enable; /* May be enabled in bonds. */ | |
118 | bool is_tunnel; /* Is a tunnel port. */ | |
119 | ||
120 | struct cfm *cfm; /* CFM handle or null. */ | |
121 | struct bfd *bfd; /* BFD handle or null. */ | |
122 | }; | |
123 | ||
4d0acc70 EJ |
124 | struct xlate_ctx { |
125 | struct xlate_in *xin; | |
126 | struct xlate_out *xout; | |
127 | ||
46c88433 | 128 | const struct xbridge *xbridge; |
4d0acc70 EJ |
129 | |
130 | /* Flow at the last commit. */ | |
131 | struct flow base_flow; | |
132 | ||
133 | /* Tunnel IP destination address as received. This is stored separately | |
134 | * as the base_flow.tunnel is cleared on init to reflect the datapath | |
135 | * behavior. Used to make sure not to send tunneled output to ourselves, | |
136 | * which might lead to an infinite loop. This could happen easily | |
137 | * if a tunnel is marked as 'ip_remote=flow', and the flow does not | |
138 | * actually set the tun_dst field. */ | |
139 | ovs_be32 orig_tunnel_ip_dst; | |
140 | ||
141 | /* Stack for the push and pop actions. Each stack element is of type | |
142 | * "union mf_subvalue". */ | |
143 | union mf_subvalue init_stack[1024 / sizeof(union mf_subvalue)]; | |
144 | struct ofpbuf stack; | |
145 | ||
146 | /* The rule that we are currently translating, or NULL. */ | |
147 | struct rule_dpif *rule; | |
148 | ||
149 | int recurse; /* Recursion level, via xlate_table_action. */ | |
150 | bool max_resubmit_trigger; /* Recursed too deeply during translation. */ | |
151 | uint32_t orig_skb_priority; /* Priority when packet arrived. */ | |
152 | uint8_t table_id; /* OpenFlow table ID where flow was found. */ | |
153 | uint32_t sflow_n_outputs; /* Number of output ports. */ | |
4e022ec0 | 154 | odp_port_t sflow_odp_port; /* Output port for composing sFlow action. */ |
4d0acc70 EJ |
155 | uint16_t user_cookie_offset;/* Used for user_action_cookie fixup. */ |
156 | bool exit; /* No further actions should be processed. */ | |
157 | }; | |
158 | ||
9583bc14 EJ |
159 | /* A controller may use OFPP_NONE as the ingress port to indicate that |
160 | * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for | |
161 | * when an input bundle is needed for validation (e.g., mirroring or | |
162 | * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have | |
3815d6c2 LS |
163 | * any 'port' structs, so care must be taken when dealing with it. |
164 | * The bundle's name and vlan mode are initialized in lookup_input_bundle() */ | |
165 | static struct xbundle ofpp_none_bundle; | |
9583bc14 | 166 | |
46c88433 EJ |
167 | static struct hmap xbridges = HMAP_INITIALIZER(&xbridges); |
168 | static struct hmap xbundles = HMAP_INITIALIZER(&xbundles); | |
169 | static struct hmap xports = HMAP_INITIALIZER(&xports); | |
170 | ||
171 | static bool may_receive(const struct xport *, struct xlate_ctx *); | |
9583bc14 EJ |
172 | static void do_xlate_actions(const struct ofpact *, size_t ofpacts_len, |
173 | struct xlate_ctx *); | |
174 | static void xlate_normal(struct xlate_ctx *); | |
175 | static void xlate_report(struct xlate_ctx *, const char *); | |
4e022ec0 | 176 | static void xlate_table_action(struct xlate_ctx *, ofp_port_t in_port, |
9583bc14 | 177 | uint8_t table_id, bool may_packet_in); |
46c88433 EJ |
178 | static bool input_vid_is_valid(uint16_t vid, struct xbundle *, bool warn); |
179 | static uint16_t input_vid_to_vlan(const struct xbundle *, uint16_t vid); | |
180 | static void output_normal(struct xlate_ctx *, const struct xbundle *, | |
9583bc14 | 181 | uint16_t vlan); |
4e022ec0 | 182 | static void compose_output_action(struct xlate_ctx *, ofp_port_t ofp_port); |
9583bc14 EJ |
183 | |
184 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
185 | ||
46c88433 EJ |
186 | static struct xbridge *xbridge_lookup(const struct ofproto_dpif *); |
187 | static struct xbundle *xbundle_lookup(const struct ofbundle *); | |
188 | static struct xport *xport_lookup(struct ofport_dpif *); | |
189 | static struct xport *get_ofp_port(const struct xbridge *, ofp_port_t ofp_port); | |
190 | ||
191 | void | |
192 | xlate_ofproto_set(struct ofproto_dpif *ofproto, const char *name, | |
193 | const struct mac_learning *ml, const struct mbridge *mbridge, | |
194 | const struct dpif_sflow *sflow, | |
195 | const struct dpif_ipfix *ipfix, enum ofp_config_flags frag, | |
196 | bool forward_bpdu, bool has_in_band, bool has_netflow, | |
197 | bool has_stp) | |
198 | { | |
199 | struct xbridge *xbridge = xbridge_lookup(ofproto); | |
200 | ||
201 | if (!xbridge) { | |
202 | xbridge = xzalloc(sizeof *xbridge); | |
203 | xbridge->ofproto = ofproto; | |
204 | ||
205 | hmap_insert(&xbridges, &xbridge->hmap_node, hash_pointer(ofproto, 0)); | |
206 | hmap_init(&xbridge->xports); | |
207 | list_init(&xbridge->xbundles); | |
208 | } | |
209 | ||
210 | if (xbridge->ml != ml) { | |
211 | mac_learning_unref(xbridge->ml); | |
212 | xbridge->ml = mac_learning_ref(ml); | |
213 | } | |
214 | ||
215 | if (xbridge->mbridge != mbridge) { | |
216 | mbridge_unref(xbridge->mbridge); | |
217 | xbridge->mbridge = mbridge_ref(mbridge); | |
218 | } | |
219 | ||
220 | if (xbridge->sflow != sflow) { | |
221 | dpif_sflow_unref(xbridge->sflow); | |
222 | xbridge->sflow = dpif_sflow_ref(sflow); | |
223 | } | |
224 | ||
225 | if (xbridge->ipfix != ipfix) { | |
226 | dpif_ipfix_unref(xbridge->ipfix); | |
227 | xbridge->ipfix = dpif_ipfix_ref(ipfix); | |
228 | } | |
229 | ||
230 | free(xbridge->name); | |
231 | xbridge->name = xstrdup(name); | |
232 | ||
233 | xbridge->forward_bpdu = forward_bpdu; | |
234 | xbridge->has_in_band = has_in_band; | |
235 | xbridge->has_netflow = has_netflow; | |
236 | xbridge->has_stp = has_stp; | |
237 | xbridge->frag = frag; | |
238 | } | |
239 | ||
240 | void | |
241 | xlate_remove_ofproto(struct ofproto_dpif *ofproto) | |
242 | { | |
243 | struct xbridge *xbridge = xbridge_lookup(ofproto); | |
244 | struct xbundle *xbundle, *next_xbundle; | |
245 | struct xport *xport, *next_xport; | |
246 | ||
247 | if (!xbridge) { | |
248 | return; | |
249 | } | |
250 | ||
251 | HMAP_FOR_EACH_SAFE (xport, next_xport, ofp_node, &xbridge->xports) { | |
252 | xlate_ofport_remove(xport->ofport); | |
253 | } | |
254 | ||
255 | LIST_FOR_EACH_SAFE (xbundle, next_xbundle, list_node, &xbridge->xbundles) { | |
256 | xlate_bundle_remove(xbundle->ofbundle); | |
257 | } | |
258 | ||
259 | hmap_remove(&xbridges, &xbridge->hmap_node); | |
260 | free(xbridge->name); | |
261 | free(xbridge); | |
262 | } | |
263 | ||
264 | void | |
265 | xlate_bundle_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle, | |
266 | const char *name, enum port_vlan_mode vlan_mode, int vlan, | |
267 | unsigned long *trunks, bool use_priority_tags, | |
268 | const struct bond *bond, const struct lacp *lacp, | |
269 | bool floodable) | |
270 | { | |
271 | struct xbundle *xbundle = xbundle_lookup(ofbundle); | |
272 | ||
273 | if (!xbundle) { | |
274 | xbundle = xzalloc(sizeof *xbundle); | |
275 | xbundle->ofbundle = ofbundle; | |
276 | xbundle->xbridge = xbridge_lookup(ofproto); | |
277 | ||
278 | hmap_insert(&xbundles, &xbundle->hmap_node, hash_pointer(ofbundle, 0)); | |
279 | list_insert(&xbundle->xbridge->xbundles, &xbundle->list_node); | |
280 | list_init(&xbundle->xports); | |
281 | } | |
282 | ||
283 | ovs_assert(xbundle->xbridge); | |
284 | ||
285 | free(xbundle->name); | |
286 | xbundle->name = xstrdup(name); | |
287 | ||
288 | xbundle->vlan_mode = vlan_mode; | |
289 | xbundle->vlan = vlan; | |
290 | xbundle->trunks = trunks; | |
291 | xbundle->use_priority_tags = use_priority_tags; | |
292 | xbundle->floodable = floodable; | |
293 | ||
294 | if (xbundle->bond != bond) { | |
295 | bond_unref(xbundle->bond); | |
296 | xbundle->bond = bond_ref(bond); | |
297 | } | |
298 | ||
299 | if (xbundle->lacp != lacp) { | |
300 | lacp_unref(xbundle->lacp); | |
301 | xbundle->lacp = lacp_ref(lacp); | |
302 | } | |
303 | } | |
304 | ||
305 | void | |
306 | xlate_bundle_remove(struct ofbundle *ofbundle) | |
307 | { | |
308 | struct xbundle *xbundle = xbundle_lookup(ofbundle); | |
309 | struct xport *xport, *next; | |
310 | ||
311 | if (!xbundle) { | |
312 | return; | |
313 | } | |
314 | ||
315 | LIST_FOR_EACH_SAFE (xport, next, bundle_node, &xbundle->xports) { | |
316 | list_remove(&xport->bundle_node); | |
317 | xport->xbundle = NULL; | |
318 | } | |
319 | ||
320 | hmap_remove(&xbundles, &xbundle->hmap_node); | |
321 | list_remove(&xbundle->list_node); | |
322 | bond_unref(xbundle->bond); | |
323 | lacp_unref(xbundle->lacp); | |
324 | free(xbundle->name); | |
325 | free(xbundle); | |
326 | } | |
327 | ||
328 | void | |
329 | xlate_ofport_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle, | |
330 | struct ofport_dpif *ofport, ofp_port_t ofp_port, | |
331 | odp_port_t odp_port, const struct netdev *netdev, | |
332 | const struct cfm *cfm, const struct bfd *bfd, | |
333 | struct ofport_dpif *peer, enum ofputil_port_config config, | |
334 | enum stp_state stp_state, bool is_tunnel, bool may_enable) | |
335 | { | |
336 | struct xport *xport = xport_lookup(ofport); | |
337 | ||
338 | if (!xport) { | |
339 | xport = xzalloc(sizeof *xport); | |
340 | xport->ofport = ofport; | |
341 | xport->xbridge = xbridge_lookup(ofproto); | |
342 | xport->ofp_port = ofp_port; | |
343 | ||
344 | hmap_insert(&xports, &xport->hmap_node, hash_pointer(ofport, 0)); | |
345 | hmap_insert(&xport->xbridge->xports, &xport->ofp_node, | |
346 | hash_ofp_port(xport->ofp_port)); | |
347 | } | |
348 | ||
349 | ovs_assert(xport->ofp_port == ofp_port); | |
350 | ||
351 | xport->config = config; | |
352 | xport->stp_state = stp_state; | |
353 | xport->is_tunnel = is_tunnel; | |
354 | xport->may_enable = may_enable; | |
355 | xport->odp_port = odp_port; | |
356 | ||
357 | if (xport->netdev != netdev) { | |
358 | netdev_close(xport->netdev); | |
359 | xport->netdev = netdev_ref(netdev); | |
360 | } | |
361 | ||
362 | if (xport->cfm != cfm) { | |
363 | cfm_unref(xport->cfm); | |
364 | xport->cfm = cfm_ref(cfm); | |
365 | } | |
366 | ||
367 | if (xport->bfd != bfd) { | |
368 | bfd_unref(xport->bfd); | |
369 | xport->bfd = bfd_ref(bfd); | |
370 | } | |
371 | ||
372 | if (xport->peer) { | |
373 | xport->peer->peer = NULL; | |
374 | } | |
375 | xport->peer = peer ? xport_lookup(peer) : NULL; | |
376 | if (xport->peer) { | |
377 | xport->peer->peer = xport; | |
378 | } | |
379 | ||
380 | if (xport->xbundle) { | |
381 | list_remove(&xport->bundle_node); | |
382 | } | |
383 | xport->xbundle = ofbundle ? xbundle_lookup(ofbundle) : NULL; | |
384 | if (xport->xbundle) { | |
385 | list_insert(&xport->xbundle->xports, &xport->bundle_node); | |
386 | } | |
387 | } | |
388 | ||
389 | void | |
390 | xlate_ofport_remove(struct ofport_dpif *ofport) | |
391 | { | |
392 | struct xport *xport = xport_lookup(ofport); | |
393 | ||
394 | if (!xport) { | |
395 | return; | |
396 | } | |
397 | ||
398 | if (xport->peer) { | |
399 | xport->peer->peer = NULL; | |
400 | xport->peer = NULL; | |
401 | } | |
402 | ||
e621a12d EJ |
403 | if (xport->xbundle) { |
404 | list_remove(&xport->bundle_node); | |
405 | } | |
406 | ||
46c88433 EJ |
407 | hmap_remove(&xports, &xport->hmap_node); |
408 | hmap_remove(&xport->xbridge->xports, &xport->ofp_node); | |
409 | ||
410 | netdev_close(xport->netdev); | |
411 | cfm_unref(xport->cfm); | |
412 | bfd_unref(xport->bfd); | |
413 | free(xport); | |
414 | } | |
415 | ||
416 | static struct xbridge * | |
417 | xbridge_lookup(const struct ofproto_dpif *ofproto) | |
418 | { | |
419 | struct xbridge *xbridge; | |
420 | ||
421 | HMAP_FOR_EACH_IN_BUCKET (xbridge, hmap_node, hash_pointer(ofproto, 0), | |
422 | &xbridges) { | |
423 | if (xbridge->ofproto == ofproto) { | |
424 | return xbridge; | |
425 | } | |
426 | } | |
427 | return NULL; | |
428 | } | |
429 | ||
430 | static struct xbundle * | |
431 | xbundle_lookup(const struct ofbundle *ofbundle) | |
432 | { | |
433 | struct xbundle *xbundle; | |
434 | ||
435 | HMAP_FOR_EACH_IN_BUCKET (xbundle, hmap_node, hash_pointer(ofbundle, 0), | |
436 | &xbundles) { | |
437 | if (xbundle->ofbundle == ofbundle) { | |
438 | return xbundle; | |
439 | } | |
440 | } | |
441 | return NULL; | |
442 | } | |
443 | ||
444 | static struct xport * | |
445 | xport_lookup(struct ofport_dpif *ofport) | |
446 | { | |
447 | struct xport *xport; | |
448 | ||
449 | HMAP_FOR_EACH_IN_BUCKET (xport, hmap_node, hash_pointer(ofport, 0), | |
450 | &xports) { | |
451 | if (xport->ofport == ofport) { | |
452 | return xport; | |
453 | } | |
454 | } | |
455 | return NULL; | |
456 | } | |
457 | ||
458 | static struct xport * | |
459 | get_ofp_port(const struct xbridge *xbridge, ofp_port_t ofp_port) | |
460 | { | |
461 | struct xport *xport; | |
462 | ||
463 | HMAP_FOR_EACH_IN_BUCKET (xport, ofp_node, hash_ofp_port(ofp_port), | |
464 | &xbridge->xports) { | |
465 | if (xport->ofp_port == ofp_port) { | |
466 | return xport; | |
467 | } | |
468 | } | |
469 | return NULL; | |
470 | } | |
471 | ||
472 | static odp_port_t | |
473 | ofp_port_to_odp_port(const struct xbridge *xbridge, ofp_port_t ofp_port) | |
474 | { | |
475 | const struct xport *xport = get_ofp_port(xbridge, ofp_port); | |
476 | return xport ? xport->odp_port : ODPP_NONE; | |
477 | } | |
478 | ||
9583bc14 | 479 | static bool |
46c88433 | 480 | xbundle_trunks_vlan(const struct xbundle *bundle, uint16_t vlan) |
9583bc14 EJ |
481 | { |
482 | return (bundle->vlan_mode != PORT_VLAN_ACCESS | |
483 | && (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan))); | |
484 | } | |
485 | ||
486 | static bool | |
46c88433 EJ |
487 | xbundle_includes_vlan(const struct xbundle *xbundle, uint16_t vlan) |
488 | { | |
489 | return vlan == xbundle->vlan || xbundle_trunks_vlan(xbundle, vlan); | |
490 | } | |
491 | ||
492 | static mirror_mask_t | |
493 | xbundle_mirror_out(const struct xbridge *xbridge, struct xbundle *xbundle) | |
494 | { | |
495 | return xbundle != &ofpp_none_bundle | |
496 | ? mirror_bundle_out(xbridge->mbridge, xbundle->ofbundle) | |
497 | : 0; | |
498 | } | |
499 | ||
500 | static mirror_mask_t | |
501 | xbundle_mirror_src(const struct xbridge *xbridge, struct xbundle *xbundle) | |
9583bc14 | 502 | { |
46c88433 EJ |
503 | return xbundle != &ofpp_none_bundle |
504 | ? mirror_bundle_src(xbridge->mbridge, xbundle->ofbundle) | |
505 | : 0; | |
9583bc14 EJ |
506 | } |
507 | ||
46c88433 EJ |
508 | static mirror_mask_t |
509 | xbundle_mirror_dst(const struct xbridge *xbridge, struct xbundle *xbundle) | |
9583bc14 | 510 | { |
46c88433 EJ |
511 | return xbundle != &ofpp_none_bundle |
512 | ? mirror_bundle_dst(xbridge->mbridge, xbundle->ofbundle) | |
513 | : 0; | |
514 | } | |
515 | ||
516 | static struct xbundle * | |
517 | lookup_input_bundle(const struct xbridge *xbridge, ofp_port_t in_port, | |
518 | bool warn, struct xport **in_xportp) | |
519 | { | |
520 | struct xport *xport; | |
9583bc14 EJ |
521 | |
522 | /* Find the port and bundle for the received packet. */ | |
46c88433 EJ |
523 | xport = get_ofp_port(xbridge, in_port); |
524 | if (in_xportp) { | |
525 | *in_xportp = xport; | |
9583bc14 | 526 | } |
46c88433 EJ |
527 | if (xport && xport->xbundle) { |
528 | return xport->xbundle; | |
9583bc14 EJ |
529 | } |
530 | ||
531 | /* Special-case OFPP_NONE, which a controller may use as the ingress | |
532 | * port for traffic that it is sourcing. */ | |
533 | if (in_port == OFPP_NONE) { | |
3815d6c2 LS |
534 | ofpp_none_bundle.name = "OFPP_NONE"; |
535 | ofpp_none_bundle.vlan_mode = PORT_VLAN_TRUNK; | |
9583bc14 EJ |
536 | return &ofpp_none_bundle; |
537 | } | |
538 | ||
539 | /* Odd. A few possible reasons here: | |
540 | * | |
541 | * - We deleted a port but there are still a few packets queued up | |
542 | * from it. | |
543 | * | |
544 | * - Someone externally added a port (e.g. "ovs-dpctl add-if") that | |
545 | * we don't know about. | |
546 | * | |
547 | * - The ofproto client didn't configure the port as part of a bundle. | |
548 | * This is particularly likely to happen if a packet was received on the | |
549 | * port after it was created, but before the client had a chance to | |
550 | * configure its bundle. | |
551 | */ | |
552 | if (warn) { | |
553 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
554 | ||
555 | VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown " | |
46c88433 | 556 | "port %"PRIu16, xbridge->name, in_port); |
9583bc14 EJ |
557 | } |
558 | return NULL; | |
559 | } | |
560 | ||
561 | static void | |
562 | add_mirror_actions(struct xlate_ctx *ctx, const struct flow *orig_flow) | |
563 | { | |
46c88433 | 564 | const struct xbridge *xbridge = ctx->xbridge; |
9583bc14 | 565 | mirror_mask_t mirrors; |
46c88433 | 566 | struct xbundle *in_xbundle; |
9583bc14 EJ |
567 | uint16_t vlan; |
568 | uint16_t vid; | |
cdf5d3a5 EJ |
569 | |
570 | mirrors = ctx->xout->mirrors; | |
571 | ctx->xout->mirrors = 0; | |
9583bc14 | 572 | |
46c88433 EJ |
573 | in_xbundle = lookup_input_bundle(xbridge, orig_flow->in_port.ofp_port, |
574 | ctx->xin->packet != NULL, NULL); | |
575 | if (!in_xbundle) { | |
9583bc14 EJ |
576 | return; |
577 | } | |
46c88433 | 578 | mirrors |= xbundle_mirror_src(xbridge, in_xbundle); |
9583bc14 EJ |
579 | |
580 | /* Drop frames on bundles reserved for mirroring. */ | |
46c88433 | 581 | if (xbundle_mirror_out(xbridge, in_xbundle)) { |
9583bc14 EJ |
582 | if (ctx->xin->packet != NULL) { |
583 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
584 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port " | |
585 | "%s, which is reserved exclusively for mirroring", | |
46c88433 | 586 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 | 587 | } |
aaa0fbae | 588 | ofpbuf_clear(&ctx->xout->odp_actions); |
9583bc14 EJ |
589 | return; |
590 | } | |
591 | ||
592 | /* Check VLAN. */ | |
593 | vid = vlan_tci_to_vid(orig_flow->vlan_tci); | |
46c88433 | 594 | if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) { |
9583bc14 EJ |
595 | return; |
596 | } | |
46c88433 | 597 | vlan = input_vid_to_vlan(in_xbundle, vid); |
9583bc14 | 598 | |
9583bc14 EJ |
599 | if (!mirrors) { |
600 | return; | |
601 | } | |
602 | ||
603 | /* Restore the original packet before adding the mirror actions. */ | |
604 | ctx->xin->flow = *orig_flow; | |
605 | ||
606 | while (mirrors) { | |
ec7ceaed EJ |
607 | mirror_mask_t dup_mirrors; |
608 | struct ofbundle *out; | |
609 | unsigned long *vlans; | |
610 | bool vlan_mirrored; | |
611 | bool has_mirror; | |
612 | int out_vlan; | |
613 | ||
46c88433 | 614 | has_mirror = mirror_get(xbridge->mbridge, mirror_mask_ffs(mirrors) - 1, |
ec7ceaed EJ |
615 | &vlans, &dup_mirrors, &out, &out_vlan); |
616 | ovs_assert(has_mirror); | |
617 | ||
618 | if (vlans) { | |
9583bc14 EJ |
619 | ctx->xout->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK); |
620 | } | |
ec7ceaed EJ |
621 | vlan_mirrored = !vlans || bitmap_is_set(vlans, vlan); |
622 | free(vlans); | |
9583bc14 | 623 | |
ec7ceaed | 624 | if (!vlan_mirrored) { |
9583bc14 EJ |
625 | mirrors = zero_rightmost_1bit(mirrors); |
626 | continue; | |
627 | } | |
628 | ||
ec7ceaed EJ |
629 | mirrors &= ~dup_mirrors; |
630 | ctx->xout->mirrors |= dup_mirrors; | |
631 | if (out) { | |
46c88433 EJ |
632 | struct xbundle *out_xbundle = xbundle_lookup(out); |
633 | if (out_xbundle) { | |
634 | output_normal(ctx, out_xbundle, vlan); | |
635 | } | |
ec7ceaed | 636 | } else if (vlan != out_vlan |
9583bc14 | 637 | && !eth_addr_is_reserved(orig_flow->dl_dst)) { |
46c88433 | 638 | struct xbundle *xbundle; |
9583bc14 | 639 | |
46c88433 EJ |
640 | LIST_FOR_EACH (xbundle, list_node, &xbridge->xbundles) { |
641 | if (xbundle_includes_vlan(xbundle, out_vlan) | |
642 | && !xbundle_mirror_out(xbridge, xbundle)) { | |
643 | output_normal(ctx, xbundle, out_vlan); | |
9583bc14 EJ |
644 | } |
645 | } | |
646 | } | |
647 | } | |
648 | } | |
649 | ||
650 | /* Given 'vid', the VID obtained from the 802.1Q header that was received as | |
46c88433 | 651 | * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle', |
9583bc14 EJ |
652 | * the bundle on which the packet was received, returns the VLAN to which the |
653 | * packet belongs. | |
654 | * | |
655 | * Both 'vid' and the return value are in the range 0...4095. */ | |
656 | static uint16_t | |
46c88433 | 657 | input_vid_to_vlan(const struct xbundle *in_xbundle, uint16_t vid) |
9583bc14 | 658 | { |
46c88433 | 659 | switch (in_xbundle->vlan_mode) { |
9583bc14 | 660 | case PORT_VLAN_ACCESS: |
46c88433 | 661 | return in_xbundle->vlan; |
9583bc14 EJ |
662 | break; |
663 | ||
664 | case PORT_VLAN_TRUNK: | |
665 | return vid; | |
666 | ||
667 | case PORT_VLAN_NATIVE_UNTAGGED: | |
668 | case PORT_VLAN_NATIVE_TAGGED: | |
46c88433 | 669 | return vid ? vid : in_xbundle->vlan; |
9583bc14 EJ |
670 | |
671 | default: | |
672 | NOT_REACHED(); | |
673 | } | |
674 | } | |
675 | ||
46c88433 | 676 | /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'. |
9583bc14 EJ |
677 | * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs |
678 | * a warning. | |
679 | * | |
680 | * 'vid' should be the VID obtained from the 802.1Q header that was received as | |
681 | * part of a packet (specify 0 if there was no 802.1Q header), in the range | |
682 | * 0...4095. */ | |
683 | static bool | |
46c88433 | 684 | input_vid_is_valid(uint16_t vid, struct xbundle *in_xbundle, bool warn) |
9583bc14 EJ |
685 | { |
686 | /* Allow any VID on the OFPP_NONE port. */ | |
46c88433 | 687 | if (in_xbundle == &ofpp_none_bundle) { |
9583bc14 EJ |
688 | return true; |
689 | } | |
690 | ||
46c88433 | 691 | switch (in_xbundle->vlan_mode) { |
9583bc14 EJ |
692 | case PORT_VLAN_ACCESS: |
693 | if (vid) { | |
694 | if (warn) { | |
695 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
46c88433 | 696 | VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" tagged " |
9583bc14 | 697 | "packet received on port %s configured as VLAN " |
46c88433 EJ |
698 | "%"PRIu16" access port", vid, in_xbundle->name, |
699 | in_xbundle->vlan); | |
9583bc14 EJ |
700 | } |
701 | return false; | |
702 | } | |
703 | return true; | |
704 | ||
705 | case PORT_VLAN_NATIVE_UNTAGGED: | |
706 | case PORT_VLAN_NATIVE_TAGGED: | |
707 | if (!vid) { | |
708 | /* Port must always carry its native VLAN. */ | |
709 | return true; | |
710 | } | |
711 | /* Fall through. */ | |
712 | case PORT_VLAN_TRUNK: | |
46c88433 | 713 | if (!xbundle_includes_vlan(in_xbundle, vid)) { |
9583bc14 EJ |
714 | if (warn) { |
715 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
46c88433 | 716 | VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" packet " |
9583bc14 | 717 | "received on port %s not configured for trunking " |
46c88433 | 718 | "VLAN %"PRIu16, vid, in_xbundle->name, vid); |
9583bc14 EJ |
719 | } |
720 | return false; | |
721 | } | |
722 | return true; | |
723 | ||
724 | default: | |
725 | NOT_REACHED(); | |
726 | } | |
727 | ||
728 | } | |
729 | ||
730 | /* Given 'vlan', the VLAN that a packet belongs to, and | |
46c88433 | 731 | * 'out_xbundle', a bundle on which the packet is to be output, returns the VID |
9583bc14 EJ |
732 | * that should be included in the 802.1Q header. (If the return value is 0, |
733 | * then the 802.1Q header should only be included in the packet if there is a | |
734 | * nonzero PCP.) | |
735 | * | |
736 | * Both 'vlan' and the return value are in the range 0...4095. */ | |
737 | static uint16_t | |
46c88433 | 738 | output_vlan_to_vid(const struct xbundle *out_xbundle, uint16_t vlan) |
9583bc14 | 739 | { |
46c88433 | 740 | switch (out_xbundle->vlan_mode) { |
9583bc14 EJ |
741 | case PORT_VLAN_ACCESS: |
742 | return 0; | |
743 | ||
744 | case PORT_VLAN_TRUNK: | |
745 | case PORT_VLAN_NATIVE_TAGGED: | |
746 | return vlan; | |
747 | ||
748 | case PORT_VLAN_NATIVE_UNTAGGED: | |
46c88433 | 749 | return vlan == out_xbundle->vlan ? 0 : vlan; |
9583bc14 EJ |
750 | |
751 | default: | |
752 | NOT_REACHED(); | |
753 | } | |
754 | } | |
755 | ||
756 | static void | |
46c88433 | 757 | output_normal(struct xlate_ctx *ctx, const struct xbundle *out_xbundle, |
9583bc14 EJ |
758 | uint16_t vlan) |
759 | { | |
33bf9176 | 760 | ovs_be16 *flow_tci = &ctx->xin->flow.vlan_tci; |
9583bc14 EJ |
761 | uint16_t vid; |
762 | ovs_be16 tci, old_tci; | |
46c88433 | 763 | struct xport *xport; |
9583bc14 | 764 | |
46c88433 EJ |
765 | vid = output_vlan_to_vid(out_xbundle, vlan); |
766 | if (list_is_empty(&out_xbundle->xports)) { | |
767 | /* Partially configured bundle with no slaves. Drop the packet. */ | |
768 | return; | |
769 | } else if (!out_xbundle->bond) { | |
770 | xport = CONTAINER_OF(list_front(&out_xbundle->xports), struct xport, | |
771 | bundle_node); | |
9583bc14 | 772 | } else { |
46c88433 EJ |
773 | struct ofport_dpif *ofport; |
774 | ||
775 | ofport = bond_choose_output_slave(out_xbundle->bond, &ctx->xin->flow, | |
776 | &ctx->xout->wc, vid, | |
777 | &ctx->xout->tags); | |
778 | xport = ofport ? xport_lookup(ofport) : NULL; | |
779 | ||
780 | if (!xport) { | |
9583bc14 EJ |
781 | /* No slaves enabled, so drop packet. */ |
782 | return; | |
783 | } | |
784 | } | |
785 | ||
33bf9176 | 786 | old_tci = *flow_tci; |
9583bc14 | 787 | tci = htons(vid); |
46c88433 | 788 | if (tci || out_xbundle->use_priority_tags) { |
33bf9176 | 789 | tci |= *flow_tci & htons(VLAN_PCP_MASK); |
9583bc14 EJ |
790 | if (tci) { |
791 | tci |= htons(VLAN_CFI); | |
792 | } | |
793 | } | |
33bf9176 | 794 | *flow_tci = tci; |
9583bc14 | 795 | |
46c88433 | 796 | compose_output_action(ctx, xport->ofp_port); |
33bf9176 | 797 | *flow_tci = old_tci; |
9583bc14 EJ |
798 | } |
799 | ||
800 | /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after | |
801 | * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to | |
802 | * indicate this; newer upstream kernels use gratuitous ARP requests. */ | |
803 | static bool | |
804 | is_gratuitous_arp(const struct flow *flow, struct flow_wildcards *wc) | |
805 | { | |
806 | if (flow->dl_type != htons(ETH_TYPE_ARP)) { | |
807 | return false; | |
808 | } | |
809 | ||
810 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
811 | if (!eth_addr_is_broadcast(flow->dl_dst)) { | |
812 | return false; | |
813 | } | |
814 | ||
815 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
816 | if (flow->nw_proto == ARP_OP_REPLY) { | |
817 | return true; | |
818 | } else if (flow->nw_proto == ARP_OP_REQUEST) { | |
819 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
820 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
821 | ||
822 | return flow->nw_src == flow->nw_dst; | |
823 | } else { | |
824 | return false; | |
825 | } | |
826 | } | |
827 | ||
828 | static void | |
46c88433 | 829 | update_learning_table(const struct xbridge *xbridge, |
9583bc14 | 830 | const struct flow *flow, struct flow_wildcards *wc, |
46c88433 | 831 | int vlan, struct xbundle *in_xbundle) |
9583bc14 EJ |
832 | { |
833 | struct mac_entry *mac; | |
834 | ||
835 | /* Don't learn the OFPP_NONE port. */ | |
46c88433 | 836 | if (in_xbundle == &ofpp_none_bundle) { |
9583bc14 EJ |
837 | return; |
838 | } | |
839 | ||
509c0149 | 840 | ovs_rwlock_wrlock(&xbridge->ml->rwlock); |
46c88433 | 841 | if (!mac_learning_may_learn(xbridge->ml, flow->dl_src, vlan)) { |
509c0149 | 842 | goto out; |
9583bc14 EJ |
843 | } |
844 | ||
46c88433 | 845 | mac = mac_learning_insert(xbridge->ml, flow->dl_src, vlan); |
9583bc14 EJ |
846 | if (is_gratuitous_arp(flow, wc)) { |
847 | /* We don't want to learn from gratuitous ARP packets that are | |
848 | * reflected back over bond slaves so we lock the learning table. */ | |
46c88433 | 849 | if (!in_xbundle->bond) { |
9583bc14 EJ |
850 | mac_entry_set_grat_arp_lock(mac); |
851 | } else if (mac_entry_is_grat_arp_locked(mac)) { | |
509c0149 | 852 | goto out; |
9583bc14 EJ |
853 | } |
854 | } | |
855 | ||
46c88433 | 856 | if (mac_entry_is_new(mac) || mac->port.p != in_xbundle->ofbundle) { |
9583bc14 EJ |
857 | /* The log messages here could actually be useful in debugging, |
858 | * so keep the rate limit relatively high. */ | |
859 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300); | |
860 | VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is " | |
861 | "on port %s in VLAN %d", | |
46c88433 EJ |
862 | xbridge->name, ETH_ADDR_ARGS(flow->dl_src), |
863 | in_xbundle->name, vlan); | |
9583bc14 | 864 | |
46c88433 EJ |
865 | mac->port.p = in_xbundle->ofbundle; |
866 | mac_learning_changed(xbridge->ml, mac); | |
9583bc14 | 867 | } |
509c0149 EJ |
868 | out: |
869 | ovs_rwlock_unlock(&xbridge->ml->rwlock); | |
9583bc14 EJ |
870 | } |
871 | ||
46c88433 | 872 | /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or |
9583bc14 EJ |
873 | * dropped. Returns true if they may be forwarded, false if they should be |
874 | * dropped. | |
875 | * | |
46c88433 | 876 | * 'in_port' must be the xport that corresponds to flow->in_port. |
9583bc14 EJ |
877 | * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull). |
878 | * | |
879 | * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as | |
880 | * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as | |
881 | * checked by input_vid_is_valid(). | |
882 | * | |
883 | * May also add tags to '*tags', although the current implementation only does | |
884 | * so in one special case. | |
885 | */ | |
886 | static bool | |
46c88433 | 887 | is_admissible(struct xlate_ctx *ctx, struct xport *in_port, |
9583bc14 EJ |
888 | uint16_t vlan) |
889 | { | |
46c88433 EJ |
890 | struct xbundle *in_xbundle = in_port->xbundle; |
891 | const struct xbridge *xbridge = ctx->xbridge; | |
9583bc14 | 892 | struct flow *flow = &ctx->xin->flow; |
9583bc14 EJ |
893 | |
894 | /* Drop frames for reserved multicast addresses | |
895 | * only if forward_bpdu option is absent. */ | |
46c88433 | 896 | if (!xbridge->forward_bpdu && eth_addr_is_reserved(flow->dl_dst)) { |
9583bc14 EJ |
897 | xlate_report(ctx, "packet has reserved destination MAC, dropping"); |
898 | return false; | |
899 | } | |
900 | ||
46c88433 | 901 | if (in_xbundle->bond) { |
9583bc14 EJ |
902 | struct mac_entry *mac; |
903 | ||
46c88433 | 904 | switch (bond_check_admissibility(in_xbundle->bond, in_port->ofport, |
9583bc14 EJ |
905 | flow->dl_dst, &ctx->xout->tags)) { |
906 | case BV_ACCEPT: | |
907 | break; | |
908 | ||
909 | case BV_DROP: | |
910 | xlate_report(ctx, "bonding refused admissibility, dropping"); | |
911 | return false; | |
912 | ||
913 | case BV_DROP_IF_MOVED: | |
509c0149 | 914 | ovs_rwlock_rdlock(&xbridge->ml->rwlock); |
46c88433 EJ |
915 | mac = mac_learning_lookup(xbridge->ml, flow->dl_src, vlan, NULL); |
916 | if (mac && mac->port.p != in_xbundle->ofbundle && | |
9583bc14 EJ |
917 | (!is_gratuitous_arp(flow, &ctx->xout->wc) |
918 | || mac_entry_is_grat_arp_locked(mac))) { | |
509c0149 | 919 | ovs_rwlock_unlock(&xbridge->ml->rwlock); |
9583bc14 EJ |
920 | xlate_report(ctx, "SLB bond thinks this packet looped back, " |
921 | "dropping"); | |
922 | return false; | |
923 | } | |
509c0149 | 924 | ovs_rwlock_unlock(&xbridge->ml->rwlock); |
9583bc14 EJ |
925 | break; |
926 | } | |
927 | } | |
928 | ||
929 | return true; | |
930 | } | |
931 | ||
932 | static void | |
933 | xlate_normal(struct xlate_ctx *ctx) | |
934 | { | |
33bf9176 BP |
935 | struct flow_wildcards *wc = &ctx->xout->wc; |
936 | struct flow *flow = &ctx->xin->flow; | |
46c88433 EJ |
937 | struct xbundle *in_xbundle; |
938 | struct xport *in_port; | |
9583bc14 EJ |
939 | struct mac_entry *mac; |
940 | uint16_t vlan; | |
941 | uint16_t vid; | |
942 | ||
943 | ctx->xout->has_normal = true; | |
944 | ||
33bf9176 BP |
945 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); |
946 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
1dd35f8a | 947 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
9583bc14 | 948 | |
46c88433 EJ |
949 | in_xbundle = lookup_input_bundle(ctx->xbridge, flow->in_port.ofp_port, |
950 | ctx->xin->packet != NULL, &in_port); | |
951 | if (!in_xbundle) { | |
9583bc14 EJ |
952 | xlate_report(ctx, "no input bundle, dropping"); |
953 | return; | |
954 | } | |
955 | ||
956 | /* Drop malformed frames. */ | |
33bf9176 BP |
957 | if (flow->dl_type == htons(ETH_TYPE_VLAN) && |
958 | !(flow->vlan_tci & htons(VLAN_CFI))) { | |
9583bc14 EJ |
959 | if (ctx->xin->packet != NULL) { |
960 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
961 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet with partial " | |
962 | "VLAN tag received on port %s", | |
46c88433 | 963 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 EJ |
964 | } |
965 | xlate_report(ctx, "partial VLAN tag, dropping"); | |
966 | return; | |
967 | } | |
968 | ||
969 | /* Drop frames on bundles reserved for mirroring. */ | |
46c88433 | 970 | if (xbundle_mirror_out(ctx->xbridge, in_xbundle)) { |
9583bc14 EJ |
971 | if (ctx->xin->packet != NULL) { |
972 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
973 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port " | |
974 | "%s, which is reserved exclusively for mirroring", | |
46c88433 | 975 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 EJ |
976 | } |
977 | xlate_report(ctx, "input port is mirror output port, dropping"); | |
978 | return; | |
979 | } | |
980 | ||
981 | /* Check VLAN. */ | |
33bf9176 | 982 | vid = vlan_tci_to_vid(flow->vlan_tci); |
46c88433 | 983 | if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) { |
9583bc14 EJ |
984 | xlate_report(ctx, "disallowed VLAN VID for this input port, dropping"); |
985 | return; | |
986 | } | |
46c88433 | 987 | vlan = input_vid_to_vlan(in_xbundle, vid); |
9583bc14 EJ |
988 | |
989 | /* Check other admissibility requirements. */ | |
990 | if (in_port && !is_admissible(ctx, in_port, vlan)) { | |
991 | return; | |
992 | } | |
993 | ||
994 | /* Learn source MAC. */ | |
995 | if (ctx->xin->may_learn) { | |
46c88433 | 996 | update_learning_table(ctx->xbridge, flow, wc, vlan, in_xbundle); |
9583bc14 EJ |
997 | } |
998 | ||
999 | /* Determine output bundle. */ | |
509c0149 | 1000 | ovs_rwlock_rdlock(&ctx->xbridge->ml->rwlock); |
46c88433 | 1001 | mac = mac_learning_lookup(ctx->xbridge->ml, flow->dl_dst, vlan, |
9583bc14 EJ |
1002 | &ctx->xout->tags); |
1003 | if (mac) { | |
46c88433 EJ |
1004 | struct xbundle *mac_xbundle = xbundle_lookup(mac->port.p); |
1005 | if (mac_xbundle && mac_xbundle != in_xbundle) { | |
9583bc14 | 1006 | xlate_report(ctx, "forwarding to learned port"); |
46c88433 EJ |
1007 | output_normal(ctx, mac_xbundle, vlan); |
1008 | } else if (!mac_xbundle) { | |
1009 | xlate_report(ctx, "learned port is unknown, dropping"); | |
9583bc14 EJ |
1010 | } else { |
1011 | xlate_report(ctx, "learned port is input port, dropping"); | |
1012 | } | |
1013 | } else { | |
46c88433 | 1014 | struct xbundle *xbundle; |
9583bc14 EJ |
1015 | |
1016 | xlate_report(ctx, "no learned MAC for destination, flooding"); | |
46c88433 EJ |
1017 | LIST_FOR_EACH (xbundle, list_node, &ctx->xbridge->xbundles) { |
1018 | if (xbundle != in_xbundle | |
1019 | && xbundle_includes_vlan(xbundle, vlan) | |
1020 | && xbundle->floodable | |
1021 | && !xbundle_mirror_out(ctx->xbridge, xbundle)) { | |
1022 | output_normal(ctx, xbundle, vlan); | |
9583bc14 EJ |
1023 | } |
1024 | } | |
1025 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
1026 | } | |
509c0149 | 1027 | ovs_rwlock_unlock(&ctx->xbridge->ml->rwlock); |
9583bc14 EJ |
1028 | } |
1029 | ||
1030 | /* Compose SAMPLE action for sFlow or IPFIX. The given probability is | |
1031 | * the number of packets out of UINT32_MAX to sample. The given | |
1032 | * cookie is passed back in the callback for each sampled packet. | |
1033 | */ | |
1034 | static size_t | |
46c88433 | 1035 | compose_sample_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1036 | struct ofpbuf *odp_actions, |
1037 | const struct flow *flow, | |
1038 | const uint32_t probability, | |
1039 | const union user_action_cookie *cookie, | |
1040 | const size_t cookie_size) | |
1041 | { | |
1042 | size_t sample_offset, actions_offset; | |
1043 | int cookie_offset; | |
1044 | ||
1045 | sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE); | |
1046 | ||
1047 | nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability); | |
1048 | ||
1049 | actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS); | |
46c88433 EJ |
1050 | cookie_offset = put_userspace_action(xbridge->ofproto, odp_actions, flow, |
1051 | cookie, cookie_size); | |
9583bc14 EJ |
1052 | |
1053 | nl_msg_end_nested(odp_actions, actions_offset); | |
1054 | nl_msg_end_nested(odp_actions, sample_offset); | |
1055 | return cookie_offset; | |
1056 | } | |
1057 | ||
1058 | static void | |
46c88433 EJ |
1059 | compose_sflow_cookie(const struct xbridge *xbridge, ovs_be16 vlan_tci, |
1060 | odp_port_t odp_port, unsigned int n_outputs, | |
1061 | union user_action_cookie *cookie) | |
9583bc14 EJ |
1062 | { |
1063 | int ifindex; | |
1064 | ||
1065 | cookie->type = USER_ACTION_COOKIE_SFLOW; | |
1066 | cookie->sflow.vlan_tci = vlan_tci; | |
1067 | ||
1068 | /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output | |
1069 | * port information") for the interpretation of cookie->output. */ | |
1070 | switch (n_outputs) { | |
1071 | case 0: | |
1072 | /* 0x40000000 | 256 means "packet dropped for unknown reason". */ | |
1073 | cookie->sflow.output = 0x40000000 | 256; | |
1074 | break; | |
1075 | ||
1076 | case 1: | |
46c88433 | 1077 | ifindex = dpif_sflow_odp_port_to_ifindex(xbridge->sflow, odp_port); |
9583bc14 EJ |
1078 | if (ifindex) { |
1079 | cookie->sflow.output = ifindex; | |
1080 | break; | |
1081 | } | |
1082 | /* Fall through. */ | |
1083 | default: | |
1084 | /* 0x80000000 means "multiple output ports. */ | |
1085 | cookie->sflow.output = 0x80000000 | n_outputs; | |
1086 | break; | |
1087 | } | |
1088 | } | |
1089 | ||
1090 | /* Compose SAMPLE action for sFlow bridge sampling. */ | |
1091 | static size_t | |
46c88433 | 1092 | compose_sflow_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1093 | struct ofpbuf *odp_actions, |
1094 | const struct flow *flow, | |
4e022ec0 | 1095 | odp_port_t odp_port) |
9583bc14 EJ |
1096 | { |
1097 | uint32_t probability; | |
1098 | union user_action_cookie cookie; | |
1099 | ||
46c88433 | 1100 | if (!xbridge->sflow || flow->in_port.ofp_port == OFPP_NONE) { |
9583bc14 EJ |
1101 | return 0; |
1102 | } | |
1103 | ||
46c88433 EJ |
1104 | probability = dpif_sflow_get_probability(xbridge->sflow); |
1105 | compose_sflow_cookie(xbridge, htons(0), odp_port, | |
4e022ec0 | 1106 | odp_port == ODPP_NONE ? 0 : 1, &cookie); |
9583bc14 | 1107 | |
46c88433 | 1108 | return compose_sample_action(xbridge, odp_actions, flow, probability, |
9583bc14 EJ |
1109 | &cookie, sizeof cookie.sflow); |
1110 | } | |
1111 | ||
1112 | static void | |
1113 | compose_flow_sample_cookie(uint16_t probability, uint32_t collector_set_id, | |
1114 | uint32_t obs_domain_id, uint32_t obs_point_id, | |
1115 | union user_action_cookie *cookie) | |
1116 | { | |
1117 | cookie->type = USER_ACTION_COOKIE_FLOW_SAMPLE; | |
1118 | cookie->flow_sample.probability = probability; | |
1119 | cookie->flow_sample.collector_set_id = collector_set_id; | |
1120 | cookie->flow_sample.obs_domain_id = obs_domain_id; | |
1121 | cookie->flow_sample.obs_point_id = obs_point_id; | |
1122 | } | |
1123 | ||
1124 | static void | |
1125 | compose_ipfix_cookie(union user_action_cookie *cookie) | |
1126 | { | |
1127 | cookie->type = USER_ACTION_COOKIE_IPFIX; | |
1128 | } | |
1129 | ||
1130 | /* Compose SAMPLE action for IPFIX bridge sampling. */ | |
1131 | static void | |
46c88433 | 1132 | compose_ipfix_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1133 | struct ofpbuf *odp_actions, |
1134 | const struct flow *flow) | |
1135 | { | |
1136 | uint32_t probability; | |
1137 | union user_action_cookie cookie; | |
1138 | ||
46c88433 | 1139 | if (!xbridge->ipfix || flow->in_port.ofp_port == OFPP_NONE) { |
9583bc14 EJ |
1140 | return; |
1141 | } | |
1142 | ||
46c88433 | 1143 | probability = dpif_ipfix_get_bridge_exporter_probability(xbridge->ipfix); |
9583bc14 EJ |
1144 | compose_ipfix_cookie(&cookie); |
1145 | ||
46c88433 | 1146 | compose_sample_action(xbridge, odp_actions, flow, probability, |
9583bc14 EJ |
1147 | &cookie, sizeof cookie.ipfix); |
1148 | } | |
1149 | ||
1150 | /* SAMPLE action for sFlow must be first action in any given list of | |
1151 | * actions. At this point we do not have all information required to | |
1152 | * build it. So try to build sample action as complete as possible. */ | |
1153 | static void | |
1154 | add_sflow_action(struct xlate_ctx *ctx) | |
1155 | { | |
46c88433 | 1156 | ctx->user_cookie_offset = compose_sflow_action(ctx->xbridge, |
9583bc14 | 1157 | &ctx->xout->odp_actions, |
4e022ec0 | 1158 | &ctx->xin->flow, ODPP_NONE); |
9583bc14 EJ |
1159 | ctx->sflow_odp_port = 0; |
1160 | ctx->sflow_n_outputs = 0; | |
1161 | } | |
1162 | ||
1163 | /* SAMPLE action for IPFIX must be 1st or 2nd action in any given list | |
1164 | * of actions, eventually after the SAMPLE action for sFlow. */ | |
1165 | static void | |
1166 | add_ipfix_action(struct xlate_ctx *ctx) | |
1167 | { | |
46c88433 | 1168 | compose_ipfix_action(ctx->xbridge, &ctx->xout->odp_actions, |
9583bc14 EJ |
1169 | &ctx->xin->flow); |
1170 | } | |
1171 | ||
1172 | /* Fix SAMPLE action according to data collected while composing ODP actions. | |
1173 | * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested | |
1174 | * USERSPACE action's user-cookie which is required for sflow. */ | |
1175 | static void | |
1176 | fix_sflow_action(struct xlate_ctx *ctx) | |
1177 | { | |
1178 | const struct flow *base = &ctx->base_flow; | |
1179 | union user_action_cookie *cookie; | |
1180 | ||
1181 | if (!ctx->user_cookie_offset) { | |
1182 | return; | |
1183 | } | |
1184 | ||
1185 | cookie = ofpbuf_at(&ctx->xout->odp_actions, ctx->user_cookie_offset, | |
1186 | sizeof cookie->sflow); | |
1187 | ovs_assert(cookie->type == USER_ACTION_COOKIE_SFLOW); | |
1188 | ||
46c88433 | 1189 | compose_sflow_cookie(ctx->xbridge, base->vlan_tci, |
9583bc14 EJ |
1190 | ctx->sflow_odp_port, ctx->sflow_n_outputs, cookie); |
1191 | } | |
1192 | ||
db7d4e46 | 1193 | static enum slow_path_reason |
642dc74d | 1194 | process_special(struct xlate_ctx *ctx, const struct flow *flow, |
46c88433 | 1195 | const struct xport *xport, const struct ofpbuf *packet) |
db7d4e46 | 1196 | { |
642dc74d | 1197 | struct flow_wildcards *wc = &ctx->xout->wc; |
46c88433 | 1198 | const struct xbridge *xbridge = ctx->xbridge; |
642dc74d | 1199 | |
46c88433 | 1200 | if (!xport) { |
db7d4e46 | 1201 | return 0; |
46c88433 | 1202 | } else if (xport->cfm && cfm_should_process_flow(xport->cfm, flow, wc)) { |
db7d4e46 | 1203 | if (packet) { |
46c88433 | 1204 | cfm_process_heartbeat(xport->cfm, packet); |
db7d4e46 JP |
1205 | } |
1206 | return SLOW_CFM; | |
fab52e16 | 1207 | } else if (xport->bfd && bfd_should_process_flow(xport->bfd, flow, wc)) { |
db7d4e46 | 1208 | if (packet) { |
46c88433 | 1209 | bfd_process_packet(xport->bfd, flow, packet); |
db7d4e46 JP |
1210 | } |
1211 | return SLOW_BFD; | |
46c88433 | 1212 | } else if (xport->xbundle && xport->xbundle->lacp |
db7d4e46 JP |
1213 | && flow->dl_type == htons(ETH_TYPE_LACP)) { |
1214 | if (packet) { | |
46c88433 | 1215 | lacp_process_packet(xport->xbundle->lacp, xport->ofport, packet); |
db7d4e46 JP |
1216 | } |
1217 | return SLOW_LACP; | |
46c88433 | 1218 | } else if (xbridge->has_stp && stp_should_process_flow(flow, wc)) { |
db7d4e46 | 1219 | if (packet) { |
46c88433 | 1220 | stp_process_packet(xport->ofport, packet); |
db7d4e46 JP |
1221 | } |
1222 | return SLOW_STP; | |
1223 | } else { | |
1224 | return 0; | |
1225 | } | |
1226 | } | |
1227 | ||
9583bc14 | 1228 | static void |
4e022ec0 | 1229 | compose_output_action__(struct xlate_ctx *ctx, ofp_port_t ofp_port, |
9583bc14 EJ |
1230 | bool check_stp) |
1231 | { | |
46c88433 | 1232 | const struct xport *xport = get_ofp_port(ctx->xbridge, ofp_port); |
1dd35f8a | 1233 | struct flow_wildcards *wc = &ctx->xout->wc; |
33bf9176 | 1234 | struct flow *flow = &ctx->xin->flow; |
9583bc14 EJ |
1235 | ovs_be16 flow_vlan_tci; |
1236 | uint32_t flow_skb_mark; | |
1237 | uint8_t flow_nw_tos; | |
4e022ec0 | 1238 | odp_port_t out_port, odp_port; |
ca077186 | 1239 | uint8_t dscp; |
9583bc14 EJ |
1240 | |
1241 | /* If 'struct flow' gets additional metadata, we'll need to zero it out | |
1242 | * before traversing a patch port. */ | |
1243 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 20); | |
1244 | ||
46c88433 | 1245 | if (!xport) { |
9583bc14 EJ |
1246 | xlate_report(ctx, "Nonexistent output port"); |
1247 | return; | |
46c88433 | 1248 | } else if (xport->config & OFPUTIL_PC_NO_FWD) { |
9583bc14 EJ |
1249 | xlate_report(ctx, "OFPPC_NO_FWD set, skipping output"); |
1250 | return; | |
46c88433 | 1251 | } else if (check_stp && !stp_forward_in_state(xport->stp_state)) { |
9583bc14 EJ |
1252 | xlate_report(ctx, "STP not in forwarding state, skipping output"); |
1253 | return; | |
1254 | } | |
1255 | ||
46c88433 EJ |
1256 | if (mbridge_has_mirrors(ctx->xbridge->mbridge) && xport->xbundle) { |
1257 | ctx->xout->mirrors |= xbundle_mirror_dst(xport->xbundle->xbridge, | |
1258 | xport->xbundle); | |
cdf5d3a5 EJ |
1259 | } |
1260 | ||
46c88433 EJ |
1261 | if (xport->peer) { |
1262 | const struct xport *peer = xport->peer; | |
9583bc14 | 1263 | struct flow old_flow = ctx->xin->flow; |
9583bc14 | 1264 | enum slow_path_reason special; |
9583bc14 | 1265 | |
46c88433 EJ |
1266 | ctx->xbridge = peer->xbridge; |
1267 | flow->in_port.ofp_port = peer->ofp_port; | |
33bf9176 BP |
1268 | flow->metadata = htonll(0); |
1269 | memset(&flow->tunnel, 0, sizeof flow->tunnel); | |
1270 | memset(flow->regs, 0, sizeof flow->regs); | |
9583bc14 | 1271 | |
642dc74d | 1272 | special = process_special(ctx, &ctx->xin->flow, peer, |
9583bc14 EJ |
1273 | ctx->xin->packet); |
1274 | if (special) { | |
1275 | ctx->xout->slow = special; | |
ddd3c975 EJ |
1276 | } else if (may_receive(peer, ctx)) { |
1277 | if (stp_forward_in_state(peer->stp_state)) { | |
4e022ec0 | 1278 | xlate_table_action(ctx, flow->in_port.ofp_port, 0, true); |
9583bc14 EJ |
1279 | } else { |
1280 | /* Forwarding is disabled by STP. Let OFPP_NORMAL and the | |
1281 | * learning action look at the packet, then drop it. */ | |
1282 | struct flow old_base_flow = ctx->base_flow; | |
1283 | size_t old_size = ctx->xout->odp_actions.size; | |
cdf5d3a5 | 1284 | mirror_mask_t old_mirrors = ctx->xout->mirrors; |
4e022ec0 | 1285 | xlate_table_action(ctx, flow->in_port.ofp_port, 0, true); |
cdf5d3a5 | 1286 | ctx->xout->mirrors = old_mirrors; |
9583bc14 EJ |
1287 | ctx->base_flow = old_base_flow; |
1288 | ctx->xout->odp_actions.size = old_size; | |
1289 | } | |
1290 | } | |
1291 | ||
1292 | ctx->xin->flow = old_flow; | |
46c88433 | 1293 | ctx->xbridge = xport->xbundle->xbridge; |
9583bc14 EJ |
1294 | |
1295 | if (ctx->xin->resubmit_stats) { | |
46c88433 EJ |
1296 | netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats); |
1297 | netdev_vport_inc_rx(peer->netdev, ctx->xin->resubmit_stats); | |
9583bc14 EJ |
1298 | } |
1299 | ||
1300 | return; | |
1301 | } | |
1302 | ||
33bf9176 BP |
1303 | flow_vlan_tci = flow->vlan_tci; |
1304 | flow_skb_mark = flow->skb_mark; | |
1305 | flow_nw_tos = flow->nw_tos; | |
9583bc14 | 1306 | |
46c88433 EJ |
1307 | if (ofproto_dpif_dscp_from_priority(xport->ofport, flow->skb_priority, |
1308 | &dscp)) { | |
1dd35f8a | 1309 | wc->masks.nw_tos |= IP_ECN_MASK; |
33bf9176 | 1310 | flow->nw_tos &= ~IP_DSCP_MASK; |
ca077186 | 1311 | flow->nw_tos |= dscp; |
9583bc14 EJ |
1312 | } |
1313 | ||
46c88433 | 1314 | if (xport->is_tunnel) { |
9583bc14 EJ |
1315 | /* Save tunnel metadata so that changes made due to |
1316 | * the Logical (tunnel) Port are not visible for any further | |
1317 | * matches, while explicit set actions on tunnel metadata are. | |
1318 | */ | |
33bf9176 | 1319 | struct flow_tnl flow_tnl = flow->tunnel; |
46c88433 | 1320 | odp_port = tnl_port_send(xport->ofport, flow, &ctx->xout->wc); |
4e022ec0 | 1321 | if (odp_port == ODPP_NONE) { |
9583bc14 EJ |
1322 | xlate_report(ctx, "Tunneling decided against output"); |
1323 | goto out; /* restore flow_nw_tos */ | |
1324 | } | |
33bf9176 | 1325 | if (flow->tunnel.ip_dst == ctx->orig_tunnel_ip_dst) { |
9583bc14 EJ |
1326 | xlate_report(ctx, "Not tunneling to our own address"); |
1327 | goto out; /* restore flow_nw_tos */ | |
1328 | } | |
1329 | if (ctx->xin->resubmit_stats) { | |
46c88433 | 1330 | netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats); |
9583bc14 EJ |
1331 | } |
1332 | out_port = odp_port; | |
33bf9176 | 1333 | commit_odp_tunnel_action(flow, &ctx->base_flow, |
9583bc14 | 1334 | &ctx->xout->odp_actions); |
33bf9176 | 1335 | flow->tunnel = flow_tnl; /* Restore tunnel metadata */ |
9583bc14 | 1336 | } else { |
4e022ec0 | 1337 | ofp_port_t vlandev_port; |
1dd35f8a | 1338 | |
46c88433 EJ |
1339 | odp_port = xport->odp_port; |
1340 | if (ofproto_has_vlan_splinters(ctx->xbridge->ofproto)) { | |
1dd35f8a JP |
1341 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
1342 | } | |
46c88433 | 1343 | vlandev_port = vsp_realdev_to_vlandev(ctx->xbridge->ofproto, ofp_port, |
33bf9176 | 1344 | flow->vlan_tci); |
9583bc14 EJ |
1345 | if (vlandev_port == ofp_port) { |
1346 | out_port = odp_port; | |
1347 | } else { | |
46c88433 | 1348 | out_port = ofp_port_to_odp_port(ctx->xbridge, vlandev_port); |
33bf9176 | 1349 | flow->vlan_tci = htons(0); |
9583bc14 | 1350 | } |
33bf9176 | 1351 | flow->skb_mark &= ~IPSEC_MARK; |
9583bc14 | 1352 | } |
9583bc14 | 1353 | |
4e022ec0 | 1354 | if (out_port != ODPP_NONE) { |
1dd35f8a JP |
1355 | commit_odp_actions(flow, &ctx->base_flow, |
1356 | &ctx->xout->odp_actions, &ctx->xout->wc); | |
4e022ec0 AW |
1357 | nl_msg_put_odp_port(&ctx->xout->odp_actions, OVS_ACTION_ATTR_OUTPUT, |
1358 | out_port); | |
9583bc14 | 1359 | |
6cbbf4fa EJ |
1360 | ctx->sflow_odp_port = odp_port; |
1361 | ctx->sflow_n_outputs++; | |
1362 | ctx->xout->nf_output_iface = ofp_port; | |
1363 | } | |
1364 | ||
1365 | out: | |
9583bc14 | 1366 | /* Restore flow */ |
33bf9176 BP |
1367 | flow->vlan_tci = flow_vlan_tci; |
1368 | flow->skb_mark = flow_skb_mark; | |
33bf9176 | 1369 | flow->nw_tos = flow_nw_tos; |
9583bc14 EJ |
1370 | } |
1371 | ||
1372 | static void | |
4e022ec0 | 1373 | compose_output_action(struct xlate_ctx *ctx, ofp_port_t ofp_port) |
9583bc14 EJ |
1374 | { |
1375 | compose_output_action__(ctx, ofp_port, true); | |
1376 | } | |
1377 | ||
9583bc14 EJ |
1378 | /* Common rule processing in one place to avoid duplicating code. */ |
1379 | static struct rule_dpif * | |
1380 | ctx_rule_hooks(struct xlate_ctx *ctx, struct rule_dpif *rule, | |
1381 | bool may_packet_in) | |
1382 | { | |
1383 | if (ctx->xin->resubmit_hook) { | |
4d0acc70 | 1384 | ctx->xin->resubmit_hook(ctx->xin, rule, ctx->recurse); |
9583bc14 EJ |
1385 | } |
1386 | if (rule == NULL && may_packet_in) { | |
1387 | /* XXX | |
1388 | * check if table configuration flags | |
1389 | * OFPTC_TABLE_MISS_CONTROLLER, default. | |
1390 | * OFPTC_TABLE_MISS_CONTINUE, | |
1391 | * OFPTC_TABLE_MISS_DROP | |
1392 | * When OF1.0, OFPTC_TABLE_MISS_CONTINUE is used. What to do? | |
1393 | */ | |
46c88433 | 1394 | rule = rule_dpif_miss_rule(ctx->xbridge->ofproto, &ctx->xin->flow); |
9583bc14 EJ |
1395 | } |
1396 | if (rule && ctx->xin->resubmit_stats) { | |
1397 | rule_credit_stats(rule, ctx->xin->resubmit_stats); | |
1398 | } | |
1399 | return rule; | |
1400 | } | |
1401 | ||
1402 | static void | |
1403 | xlate_table_action(struct xlate_ctx *ctx, | |
4e022ec0 | 1404 | ofp_port_t in_port, uint8_t table_id, bool may_packet_in) |
9583bc14 EJ |
1405 | { |
1406 | if (ctx->recurse < MAX_RESUBMIT_RECURSION) { | |
1407 | struct rule_dpif *rule; | |
4e022ec0 | 1408 | ofp_port_t old_in_port = ctx->xin->flow.in_port.ofp_port; |
9583bc14 EJ |
1409 | uint8_t old_table_id = ctx->table_id; |
1410 | ||
1411 | ctx->table_id = table_id; | |
1412 | ||
1413 | /* Look up a flow with 'in_port' as the input port. */ | |
4e022ec0 | 1414 | ctx->xin->flow.in_port.ofp_port = in_port; |
46c88433 EJ |
1415 | rule = rule_dpif_lookup_in_table(ctx->xbridge->ofproto, |
1416 | &ctx->xin->flow, &ctx->xout->wc, | |
1417 | table_id); | |
9583bc14 | 1418 | |
46c88433 EJ |
1419 | ctx->xout->tags |= calculate_flow_tag(ctx->xbridge->ofproto, |
1420 | &ctx->xin->flow, ctx->table_id, | |
1421 | rule); | |
9583bc14 EJ |
1422 | |
1423 | /* Restore the original input port. Otherwise OFPP_NORMAL and | |
1424 | * OFPP_IN_PORT will have surprising behavior. */ | |
4e022ec0 | 1425 | ctx->xin->flow.in_port.ofp_port = old_in_port; |
9583bc14 EJ |
1426 | |
1427 | rule = ctx_rule_hooks(ctx, rule, may_packet_in); | |
1428 | ||
1429 | if (rule) { | |
1430 | struct rule_dpif *old_rule = ctx->rule; | |
1431 | ||
1432 | ctx->recurse++; | |
1433 | ctx->rule = rule; | |
1434 | do_xlate_actions(rule->up.ofpacts, rule->up.ofpacts_len, ctx); | |
1435 | ctx->rule = old_rule; | |
1436 | ctx->recurse--; | |
1437 | } | |
1438 | ||
1439 | ctx->table_id = old_table_id; | |
1440 | } else { | |
1441 | static struct vlog_rate_limit recurse_rl = VLOG_RATE_LIMIT_INIT(1, 1); | |
1442 | ||
1443 | VLOG_ERR_RL(&recurse_rl, "resubmit actions recursed over %d times", | |
1444 | MAX_RESUBMIT_RECURSION); | |
1445 | ctx->max_resubmit_trigger = true; | |
1446 | } | |
1447 | } | |
1448 | ||
1449 | static void | |
1450 | xlate_ofpact_resubmit(struct xlate_ctx *ctx, | |
1451 | const struct ofpact_resubmit *resubmit) | |
1452 | { | |
4e022ec0 | 1453 | ofp_port_t in_port; |
9583bc14 EJ |
1454 | uint8_t table_id; |
1455 | ||
1456 | in_port = resubmit->in_port; | |
1457 | if (in_port == OFPP_IN_PORT) { | |
4e022ec0 | 1458 | in_port = ctx->xin->flow.in_port.ofp_port; |
9583bc14 EJ |
1459 | } |
1460 | ||
1461 | table_id = resubmit->table_id; | |
1462 | if (table_id == 255) { | |
1463 | table_id = ctx->table_id; | |
1464 | } | |
1465 | ||
1466 | xlate_table_action(ctx, in_port, table_id, false); | |
1467 | } | |
1468 | ||
1469 | static void | |
1470 | flood_packets(struct xlate_ctx *ctx, bool all) | |
1471 | { | |
46c88433 | 1472 | const struct xport *xport; |
9583bc14 | 1473 | |
46c88433 EJ |
1474 | HMAP_FOR_EACH (xport, ofp_node, &ctx->xbridge->xports) { |
1475 | if (xport->ofp_port == ctx->xin->flow.in_port.ofp_port) { | |
9583bc14 EJ |
1476 | continue; |
1477 | } | |
1478 | ||
1479 | if (all) { | |
46c88433 EJ |
1480 | compose_output_action__(ctx, xport->ofp_port, false); |
1481 | } else if (!(xport->config & OFPUTIL_PC_NO_FLOOD)) { | |
1482 | compose_output_action(ctx, xport->ofp_port); | |
9583bc14 EJ |
1483 | } |
1484 | } | |
1485 | ||
1486 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
1487 | } | |
1488 | ||
1489 | static void | |
1490 | execute_controller_action(struct xlate_ctx *ctx, int len, | |
1491 | enum ofp_packet_in_reason reason, | |
1492 | uint16_t controller_id) | |
1493 | { | |
1494 | struct ofputil_packet_in pin; | |
1495 | struct ofpbuf *packet; | |
1496 | struct flow key; | |
1497 | ||
1498 | ovs_assert(!ctx->xout->slow || ctx->xout->slow == SLOW_CONTROLLER); | |
1499 | ctx->xout->slow = SLOW_CONTROLLER; | |
1500 | if (!ctx->xin->packet) { | |
1501 | return; | |
1502 | } | |
1503 | ||
1504 | packet = ofpbuf_clone(ctx->xin->packet); | |
1505 | ||
1506 | key.skb_priority = 0; | |
1507 | key.skb_mark = 0; | |
1508 | memset(&key.tunnel, 0, sizeof key.tunnel); | |
1509 | ||
1510 | commit_odp_actions(&ctx->xin->flow, &ctx->base_flow, | |
1dd35f8a | 1511 | &ctx->xout->odp_actions, &ctx->xout->wc); |
9583bc14 EJ |
1512 | |
1513 | odp_execute_actions(NULL, packet, &key, ctx->xout->odp_actions.data, | |
1514 | ctx->xout->odp_actions.size, NULL, NULL); | |
1515 | ||
1516 | pin.packet = packet->data; | |
1517 | pin.packet_len = packet->size; | |
1518 | pin.reason = reason; | |
1519 | pin.controller_id = controller_id; | |
1520 | pin.table_id = ctx->table_id; | |
1521 | pin.cookie = ctx->rule ? ctx->rule->up.flow_cookie : 0; | |
1522 | ||
1523 | pin.send_len = len; | |
1524 | flow_get_metadata(&ctx->xin->flow, &pin.fmd); | |
1525 | ||
46c88433 | 1526 | ofproto_dpif_send_packet_in(ctx->xbridge->ofproto, &pin); |
9583bc14 EJ |
1527 | ofpbuf_delete(packet); |
1528 | } | |
1529 | ||
1530 | static void | |
9cfef3d0 | 1531 | compose_mpls_push_action(struct xlate_ctx *ctx, ovs_be16 eth_type) |
9583bc14 | 1532 | { |
33bf9176 BP |
1533 | struct flow_wildcards *wc = &ctx->xout->wc; |
1534 | struct flow *flow = &ctx->xin->flow; | |
1535 | ||
9583bc14 EJ |
1536 | ovs_assert(eth_type_mpls(eth_type)); |
1537 | ||
33bf9176 BP |
1538 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
1539 | memset(&wc->masks.mpls_depth, 0xff, sizeof wc->masks.mpls_depth); | |
9583bc14 | 1540 | |
33bf9176 BP |
1541 | if (flow->mpls_depth) { |
1542 | flow->mpls_lse &= ~htonl(MPLS_BOS_MASK); | |
1543 | flow->mpls_depth++; | |
9583bc14 EJ |
1544 | } else { |
1545 | ovs_be32 label; | |
1546 | uint8_t tc, ttl; | |
1547 | ||
33bf9176 | 1548 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
9583bc14 EJ |
1549 | label = htonl(0x2); /* IPV6 Explicit Null. */ |
1550 | } else { | |
1551 | label = htonl(0x0); /* IPV4 Explicit Null. */ | |
1552 | } | |
1dd35f8a JP |
1553 | wc->masks.nw_tos |= IP_DSCP_MASK; |
1554 | wc->masks.nw_ttl = 0xff; | |
33bf9176 BP |
1555 | tc = (flow->nw_tos & IP_DSCP_MASK) >> 2; |
1556 | ttl = flow->nw_ttl ? flow->nw_ttl : 0x40; | |
1557 | flow->mpls_lse = set_mpls_lse_values(ttl, tc, 1, label); | |
1558 | flow->mpls_depth = 1; | |
9583bc14 | 1559 | } |
33bf9176 | 1560 | flow->dl_type = eth_type; |
9583bc14 EJ |
1561 | } |
1562 | ||
1563 | static void | |
9cfef3d0 | 1564 | compose_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type) |
9583bc14 | 1565 | { |
33bf9176 BP |
1566 | struct flow_wildcards *wc = &ctx->xout->wc; |
1567 | struct flow *flow = &ctx->xin->flow; | |
1568 | ||
9583bc14 EJ |
1569 | ovs_assert(eth_type_mpls(ctx->xin->flow.dl_type)); |
1570 | ovs_assert(!eth_type_mpls(eth_type)); | |
1571 | ||
33bf9176 BP |
1572 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
1573 | memset(&wc->masks.mpls_depth, 0xff, sizeof wc->masks.mpls_depth); | |
1574 | ||
1575 | if (flow->mpls_depth) { | |
1576 | flow->mpls_depth--; | |
1577 | flow->mpls_lse = htonl(0); | |
1578 | if (!flow->mpls_depth) { | |
1579 | flow->dl_type = eth_type; | |
9583bc14 EJ |
1580 | } |
1581 | } | |
1582 | } | |
1583 | ||
1584 | static bool | |
1585 | compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids) | |
1586 | { | |
33bf9176 BP |
1587 | struct flow *flow = &ctx->xin->flow; |
1588 | ||
1589 | if (!is_ip_any(flow)) { | |
9583bc14 EJ |
1590 | return false; |
1591 | } | |
1592 | ||
1dd35f8a | 1593 | ctx->xout->wc.masks.nw_ttl = 0xff; |
33bf9176 BP |
1594 | if (flow->nw_ttl > 1) { |
1595 | flow->nw_ttl--; | |
9583bc14 EJ |
1596 | return false; |
1597 | } else { | |
1598 | size_t i; | |
1599 | ||
1600 | for (i = 0; i < ids->n_controllers; i++) { | |
1601 | execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, | |
1602 | ids->cnt_ids[i]); | |
1603 | } | |
1604 | ||
1605 | /* Stop processing for current table. */ | |
1606 | return true; | |
1607 | } | |
1608 | } | |
1609 | ||
1610 | static bool | |
9cfef3d0 | 1611 | compose_set_mpls_ttl_action(struct xlate_ctx *ctx, uint8_t ttl) |
9583bc14 EJ |
1612 | { |
1613 | if (!eth_type_mpls(ctx->xin->flow.dl_type)) { | |
1614 | return true; | |
1615 | } | |
1616 | ||
1617 | set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse, ttl); | |
1618 | return false; | |
1619 | } | |
1620 | ||
1621 | static bool | |
9cfef3d0 | 1622 | compose_dec_mpls_ttl_action(struct xlate_ctx *ctx) |
9583bc14 | 1623 | { |
33bf9176 BP |
1624 | struct flow *flow = &ctx->xin->flow; |
1625 | uint8_t ttl = mpls_lse_to_ttl(flow->mpls_lse); | |
1dd35f8a JP |
1626 | struct flow_wildcards *wc = &ctx->xout->wc; |
1627 | ||
1dd35f8a | 1628 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
9583bc14 | 1629 | |
33bf9176 | 1630 | if (!eth_type_mpls(flow->dl_type)) { |
9583bc14 EJ |
1631 | return false; |
1632 | } | |
1633 | ||
1634 | if (ttl > 1) { | |
1635 | ttl--; | |
33bf9176 | 1636 | set_mpls_lse_ttl(&flow->mpls_lse, ttl); |
9583bc14 EJ |
1637 | return false; |
1638 | } else { | |
1639 | execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, 0); | |
1640 | ||
1641 | /* Stop processing for current table. */ | |
1642 | return true; | |
1643 | } | |
1644 | } | |
1645 | ||
1646 | static void | |
1647 | xlate_output_action(struct xlate_ctx *ctx, | |
4e022ec0 | 1648 | ofp_port_t port, uint16_t max_len, bool may_packet_in) |
9583bc14 | 1649 | { |
4e022ec0 | 1650 | ofp_port_t prev_nf_output_iface = ctx->xout->nf_output_iface; |
9583bc14 EJ |
1651 | |
1652 | ctx->xout->nf_output_iface = NF_OUT_DROP; | |
1653 | ||
1654 | switch (port) { | |
1655 | case OFPP_IN_PORT: | |
4e022ec0 | 1656 | compose_output_action(ctx, ctx->xin->flow.in_port.ofp_port); |
9583bc14 EJ |
1657 | break; |
1658 | case OFPP_TABLE: | |
4e022ec0 AW |
1659 | xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port, |
1660 | 0, may_packet_in); | |
9583bc14 EJ |
1661 | break; |
1662 | case OFPP_NORMAL: | |
1663 | xlate_normal(ctx); | |
1664 | break; | |
1665 | case OFPP_FLOOD: | |
1666 | flood_packets(ctx, false); | |
1667 | break; | |
1668 | case OFPP_ALL: | |
1669 | flood_packets(ctx, true); | |
1670 | break; | |
1671 | case OFPP_CONTROLLER: | |
1672 | execute_controller_action(ctx, max_len, OFPR_ACTION, 0); | |
1673 | break; | |
1674 | case OFPP_NONE: | |
1675 | break; | |
1676 | case OFPP_LOCAL: | |
1677 | default: | |
4e022ec0 | 1678 | if (port != ctx->xin->flow.in_port.ofp_port) { |
9583bc14 EJ |
1679 | compose_output_action(ctx, port); |
1680 | } else { | |
1681 | xlate_report(ctx, "skipping output to input port"); | |
1682 | } | |
1683 | break; | |
1684 | } | |
1685 | ||
1686 | if (prev_nf_output_iface == NF_OUT_FLOOD) { | |
1687 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
1688 | } else if (ctx->xout->nf_output_iface == NF_OUT_DROP) { | |
1689 | ctx->xout->nf_output_iface = prev_nf_output_iface; | |
1690 | } else if (prev_nf_output_iface != NF_OUT_DROP && | |
1691 | ctx->xout->nf_output_iface != NF_OUT_FLOOD) { | |
1692 | ctx->xout->nf_output_iface = NF_OUT_MULTI; | |
1693 | } | |
1694 | } | |
1695 | ||
1696 | static void | |
1697 | xlate_output_reg_action(struct xlate_ctx *ctx, | |
1698 | const struct ofpact_output_reg *or) | |
1699 | { | |
1700 | uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow); | |
1701 | if (port <= UINT16_MAX) { | |
1702 | union mf_subvalue value; | |
1703 | ||
1704 | memset(&value, 0xff, sizeof value); | |
1705 | mf_write_subfield_flow(&or->src, &value, &ctx->xout->wc.masks); | |
4e022ec0 AW |
1706 | xlate_output_action(ctx, u16_to_ofp(port), |
1707 | or->max_len, false); | |
9583bc14 EJ |
1708 | } |
1709 | } | |
1710 | ||
1711 | static void | |
1712 | xlate_enqueue_action(struct xlate_ctx *ctx, | |
1713 | const struct ofpact_enqueue *enqueue) | |
1714 | { | |
4e022ec0 | 1715 | ofp_port_t ofp_port = enqueue->port; |
9583bc14 EJ |
1716 | uint32_t queue_id = enqueue->queue; |
1717 | uint32_t flow_priority, priority; | |
1718 | int error; | |
1719 | ||
1720 | /* Translate queue to priority. */ | |
46c88433 EJ |
1721 | error = ofproto_dpif_queue_to_priority(ctx->xbridge->ofproto, queue_id, |
1722 | &priority); | |
9583bc14 EJ |
1723 | if (error) { |
1724 | /* Fall back to ordinary output action. */ | |
1725 | xlate_output_action(ctx, enqueue->port, 0, false); | |
1726 | return; | |
1727 | } | |
1728 | ||
1729 | /* Check output port. */ | |
1730 | if (ofp_port == OFPP_IN_PORT) { | |
4e022ec0 AW |
1731 | ofp_port = ctx->xin->flow.in_port.ofp_port; |
1732 | } else if (ofp_port == ctx->xin->flow.in_port.ofp_port) { | |
9583bc14 EJ |
1733 | return; |
1734 | } | |
1735 | ||
1736 | /* Add datapath actions. */ | |
1737 | flow_priority = ctx->xin->flow.skb_priority; | |
1738 | ctx->xin->flow.skb_priority = priority; | |
1739 | compose_output_action(ctx, ofp_port); | |
1740 | ctx->xin->flow.skb_priority = flow_priority; | |
1741 | ||
1742 | /* Update NetFlow output port. */ | |
1743 | if (ctx->xout->nf_output_iface == NF_OUT_DROP) { | |
1744 | ctx->xout->nf_output_iface = ofp_port; | |
1745 | } else if (ctx->xout->nf_output_iface != NF_OUT_FLOOD) { | |
1746 | ctx->xout->nf_output_iface = NF_OUT_MULTI; | |
1747 | } | |
1748 | } | |
1749 | ||
1750 | static void | |
1751 | xlate_set_queue_action(struct xlate_ctx *ctx, uint32_t queue_id) | |
1752 | { | |
1753 | uint32_t skb_priority; | |
1754 | ||
46c88433 | 1755 | if (!ofproto_dpif_queue_to_priority(ctx->xbridge->ofproto, queue_id, |
cdc3ab65 | 1756 | &skb_priority)) { |
9583bc14 EJ |
1757 | ctx->xin->flow.skb_priority = skb_priority; |
1758 | } else { | |
1759 | /* Couldn't translate queue to a priority. Nothing to do. A warning | |
1760 | * has already been logged. */ | |
1761 | } | |
1762 | } | |
1763 | ||
1764 | static bool | |
46c88433 | 1765 | slave_enabled_cb(ofp_port_t ofp_port, void *xbridge_) |
9583bc14 | 1766 | { |
46c88433 EJ |
1767 | const struct xbridge *xbridge = xbridge_; |
1768 | struct xport *port; | |
9583bc14 EJ |
1769 | |
1770 | switch (ofp_port) { | |
1771 | case OFPP_IN_PORT: | |
1772 | case OFPP_TABLE: | |
1773 | case OFPP_NORMAL: | |
1774 | case OFPP_FLOOD: | |
1775 | case OFPP_ALL: | |
1776 | case OFPP_NONE: | |
1777 | return true; | |
1778 | case OFPP_CONTROLLER: /* Not supported by the bundle action. */ | |
1779 | return false; | |
1780 | default: | |
46c88433 | 1781 | port = get_ofp_port(xbridge, ofp_port); |
9583bc14 EJ |
1782 | return port ? port->may_enable : false; |
1783 | } | |
1784 | } | |
1785 | ||
1786 | static void | |
1787 | xlate_bundle_action(struct xlate_ctx *ctx, | |
1788 | const struct ofpact_bundle *bundle) | |
1789 | { | |
4e022ec0 | 1790 | ofp_port_t port; |
9583bc14 EJ |
1791 | |
1792 | port = bundle_execute(bundle, &ctx->xin->flow, &ctx->xout->wc, | |
46c88433 EJ |
1793 | slave_enabled_cb, |
1794 | CONST_CAST(struct xbridge *, ctx->xbridge)); | |
9583bc14 | 1795 | if (bundle->dst.field) { |
4e022ec0 | 1796 | nxm_reg_load(&bundle->dst, ofp_to_u16(port), &ctx->xin->flow); |
9583bc14 EJ |
1797 | } else { |
1798 | xlate_output_action(ctx, port, 0, false); | |
1799 | } | |
1800 | } | |
1801 | ||
1802 | static void | |
1803 | xlate_learn_action(struct xlate_ctx *ctx, | |
1804 | const struct ofpact_learn *learn) | |
1805 | { | |
1806 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); | |
1807 | struct ofputil_flow_mod fm; | |
1808 | uint64_t ofpacts_stub[1024 / 8]; | |
1809 | struct ofpbuf ofpacts; | |
1810 | int error; | |
1811 | ||
1812 | ctx->xout->has_learn = true; | |
1813 | ||
1814 | learn_mask(learn, &ctx->xout->wc); | |
1815 | ||
1816 | if (!ctx->xin->may_learn) { | |
1817 | return; | |
1818 | } | |
1819 | ||
1820 | ofpbuf_use_stack(&ofpacts, ofpacts_stub, sizeof ofpacts_stub); | |
1821 | learn_execute(learn, &ctx->xin->flow, &fm, &ofpacts); | |
1822 | ||
46c88433 | 1823 | error = ofproto_dpif_flow_mod(ctx->xbridge->ofproto, &fm); |
9583bc14 EJ |
1824 | if (error && !VLOG_DROP_WARN(&rl)) { |
1825 | VLOG_WARN("learning action failed to modify flow table (%s)", | |
1826 | ofperr_get_name(error)); | |
1827 | } | |
1828 | ||
1829 | ofpbuf_uninit(&ofpacts); | |
1830 | } | |
1831 | ||
1832 | /* Reduces '*timeout' to no more than 'max'. A value of zero in either case | |
1833 | * means "infinite". */ | |
1834 | static void | |
1835 | reduce_timeout(uint16_t max, uint16_t *timeout) | |
1836 | { | |
1837 | if (max && (!*timeout || *timeout > max)) { | |
1838 | *timeout = max; | |
1839 | } | |
1840 | } | |
1841 | ||
1842 | static void | |
1843 | xlate_fin_timeout(struct xlate_ctx *ctx, | |
1844 | const struct ofpact_fin_timeout *oft) | |
1845 | { | |
1846 | if (ctx->xin->tcp_flags & (TCP_FIN | TCP_RST) && ctx->rule) { | |
1847 | struct rule_dpif *rule = ctx->rule; | |
1848 | ||
2a5183ac JP |
1849 | if (list_is_empty(&rule->up.expirable)) { |
1850 | list_insert(&rule->up.ofproto->expirable, &rule->up.expirable); | |
1851 | } | |
1852 | ||
9583bc14 EJ |
1853 | reduce_timeout(oft->fin_idle_timeout, &rule->up.idle_timeout); |
1854 | reduce_timeout(oft->fin_hard_timeout, &rule->up.hard_timeout); | |
1855 | } | |
1856 | } | |
1857 | ||
1858 | static void | |
1859 | xlate_sample_action(struct xlate_ctx *ctx, | |
1860 | const struct ofpact_sample *os) | |
1861 | { | |
1862 | union user_action_cookie cookie; | |
1863 | /* Scale the probability from 16-bit to 32-bit while representing | |
1864 | * the same percentage. */ | |
1865 | uint32_t probability = (os->probability << 16) | os->probability; | |
1866 | ||
1867 | commit_odp_actions(&ctx->xin->flow, &ctx->base_flow, | |
1dd35f8a | 1868 | &ctx->xout->odp_actions, &ctx->xout->wc); |
9583bc14 EJ |
1869 | |
1870 | compose_flow_sample_cookie(os->probability, os->collector_set_id, | |
1871 | os->obs_domain_id, os->obs_point_id, &cookie); | |
46c88433 | 1872 | compose_sample_action(ctx->xbridge, &ctx->xout->odp_actions, &ctx->xin->flow, |
9583bc14 EJ |
1873 | probability, &cookie, sizeof cookie.flow_sample); |
1874 | } | |
1875 | ||
1876 | static bool | |
46c88433 | 1877 | may_receive(const struct xport *xport, struct xlate_ctx *ctx) |
9583bc14 | 1878 | { |
46c88433 EJ |
1879 | if (xport->config & (eth_addr_equals(ctx->xin->flow.dl_dst, eth_addr_stp) |
1880 | ? OFPUTIL_PC_NO_RECV_STP | |
1881 | : OFPUTIL_PC_NO_RECV)) { | |
9583bc14 EJ |
1882 | return false; |
1883 | } | |
1884 | ||
1885 | /* Only drop packets here if both forwarding and learning are | |
1886 | * disabled. If just learning is enabled, we need to have | |
1887 | * OFPP_NORMAL and the learning action have a look at the packet | |
1888 | * before we can drop it. */ | |
46c88433 EJ |
1889 | if (!stp_forward_in_state(xport->stp_state) |
1890 | && !stp_learn_in_state(xport->stp_state)) { | |
9583bc14 EJ |
1891 | return false; |
1892 | } | |
1893 | ||
1894 | return true; | |
1895 | } | |
1896 | ||
1897 | static bool | |
1898 | tunnel_ecn_ok(struct xlate_ctx *ctx) | |
1899 | { | |
1900 | if (is_ip_any(&ctx->base_flow) | |
1901 | && (ctx->xin->flow.tunnel.ip_tos & IP_ECN_MASK) == IP_ECN_CE) { | |
1902 | if ((ctx->base_flow.nw_tos & IP_ECN_MASK) == IP_ECN_NOT_ECT) { | |
1903 | VLOG_WARN_RL(&rl, "dropping tunnel packet marked ECN CE" | |
1904 | " but is not ECN capable"); | |
1905 | return false; | |
1906 | } else { | |
1907 | /* Set the ECN CE value in the tunneled packet. */ | |
1908 | ctx->xin->flow.nw_tos |= IP_ECN_CE; | |
1909 | } | |
1910 | } | |
1911 | ||
1912 | return true; | |
1913 | } | |
1914 | ||
1915 | static void | |
1916 | do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len, | |
1917 | struct xlate_ctx *ctx) | |
1918 | { | |
33bf9176 BP |
1919 | struct flow_wildcards *wc = &ctx->xout->wc; |
1920 | struct flow *flow = &ctx->xin->flow; | |
9583bc14 EJ |
1921 | bool was_evictable = true; |
1922 | const struct ofpact *a; | |
1923 | ||
1924 | if (ctx->rule) { | |
1925 | /* Don't let the rule we're working on get evicted underneath us. */ | |
1926 | was_evictable = ctx->rule->up.evictable; | |
1927 | ctx->rule->up.evictable = false; | |
1928 | } | |
1929 | ||
9583bc14 EJ |
1930 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { |
1931 | struct ofpact_controller *controller; | |
1932 | const struct ofpact_metadata *metadata; | |
1933 | ||
1934 | if (ctx->exit) { | |
1935 | break; | |
1936 | } | |
1937 | ||
1938 | switch (a->type) { | |
1939 | case OFPACT_OUTPUT: | |
1940 | xlate_output_action(ctx, ofpact_get_OUTPUT(a)->port, | |
1941 | ofpact_get_OUTPUT(a)->max_len, true); | |
1942 | break; | |
1943 | ||
1944 | case OFPACT_CONTROLLER: | |
1945 | controller = ofpact_get_CONTROLLER(a); | |
1946 | execute_controller_action(ctx, controller->max_len, | |
1947 | controller->reason, | |
1948 | controller->controller_id); | |
1949 | break; | |
1950 | ||
1951 | case OFPACT_ENQUEUE: | |
1952 | xlate_enqueue_action(ctx, ofpact_get_ENQUEUE(a)); | |
1953 | break; | |
1954 | ||
1955 | case OFPACT_SET_VLAN_VID: | |
33bf9176 BP |
1956 | flow->vlan_tci &= ~htons(VLAN_VID_MASK); |
1957 | flow->vlan_tci |= (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid) | |
1958 | | htons(VLAN_CFI)); | |
9583bc14 EJ |
1959 | break; |
1960 | ||
1961 | case OFPACT_SET_VLAN_PCP: | |
33bf9176 BP |
1962 | flow->vlan_tci &= ~htons(VLAN_PCP_MASK); |
1963 | flow->vlan_tci |= | |
9583bc14 EJ |
1964 | htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp << VLAN_PCP_SHIFT) |
1965 | | VLAN_CFI); | |
1966 | break; | |
1967 | ||
1968 | case OFPACT_STRIP_VLAN: | |
33bf9176 | 1969 | flow->vlan_tci = htons(0); |
9583bc14 EJ |
1970 | break; |
1971 | ||
1972 | case OFPACT_PUSH_VLAN: | |
1973 | /* XXX 802.1AD(QinQ) */ | |
33bf9176 | 1974 | flow->vlan_tci = htons(VLAN_CFI); |
9583bc14 EJ |
1975 | break; |
1976 | ||
1977 | case OFPACT_SET_ETH_SRC: | |
33bf9176 | 1978 | memcpy(flow->dl_src, ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN); |
9583bc14 EJ |
1979 | break; |
1980 | ||
1981 | case OFPACT_SET_ETH_DST: | |
33bf9176 | 1982 | memcpy(flow->dl_dst, ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN); |
9583bc14 EJ |
1983 | break; |
1984 | ||
1985 | case OFPACT_SET_IPV4_SRC: | |
33bf9176 BP |
1986 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
1987 | flow->nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4; | |
9583bc14 EJ |
1988 | } |
1989 | break; | |
1990 | ||
1991 | case OFPACT_SET_IPV4_DST: | |
33bf9176 BP |
1992 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
1993 | flow->nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4; | |
9583bc14 EJ |
1994 | } |
1995 | break; | |
1996 | ||
1997 | case OFPACT_SET_IPV4_DSCP: | |
1998 | /* OpenFlow 1.0 only supports IPv4. */ | |
33bf9176 BP |
1999 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
2000 | flow->nw_tos &= ~IP_DSCP_MASK; | |
2001 | flow->nw_tos |= ofpact_get_SET_IPV4_DSCP(a)->dscp; | |
9583bc14 EJ |
2002 | } |
2003 | break; | |
2004 | ||
2005 | case OFPACT_SET_L4_SRC_PORT: | |
33bf9176 BP |
2006 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
2007 | if (is_ip_any(flow)) { | |
2008 | flow->tp_src = htons(ofpact_get_SET_L4_SRC_PORT(a)->port); | |
9583bc14 EJ |
2009 | } |
2010 | break; | |
2011 | ||
2012 | case OFPACT_SET_L4_DST_PORT: | |
33bf9176 BP |
2013 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
2014 | if (is_ip_any(flow)) { | |
2015 | flow->tp_dst = htons(ofpact_get_SET_L4_DST_PORT(a)->port); | |
9583bc14 EJ |
2016 | } |
2017 | break; | |
2018 | ||
2019 | case OFPACT_RESUBMIT: | |
2020 | xlate_ofpact_resubmit(ctx, ofpact_get_RESUBMIT(a)); | |
2021 | break; | |
2022 | ||
2023 | case OFPACT_SET_TUNNEL: | |
33bf9176 | 2024 | flow->tunnel.tun_id = htonll(ofpact_get_SET_TUNNEL(a)->tun_id); |
9583bc14 EJ |
2025 | break; |
2026 | ||
2027 | case OFPACT_SET_QUEUE: | |
2028 | xlate_set_queue_action(ctx, ofpact_get_SET_QUEUE(a)->queue_id); | |
2029 | break; | |
2030 | ||
2031 | case OFPACT_POP_QUEUE: | |
33bf9176 | 2032 | flow->skb_priority = ctx->orig_skb_priority; |
9583bc14 EJ |
2033 | break; |
2034 | ||
2035 | case OFPACT_REG_MOVE: | |
33bf9176 | 2036 | nxm_execute_reg_move(ofpact_get_REG_MOVE(a), flow, wc); |
9583bc14 EJ |
2037 | break; |
2038 | ||
2039 | case OFPACT_REG_LOAD: | |
33bf9176 | 2040 | nxm_execute_reg_load(ofpact_get_REG_LOAD(a), flow); |
9583bc14 EJ |
2041 | break; |
2042 | ||
2043 | case OFPACT_STACK_PUSH: | |
33bf9176 BP |
2044 | nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), flow, wc, |
2045 | &ctx->stack); | |
9583bc14 EJ |
2046 | break; |
2047 | ||
2048 | case OFPACT_STACK_POP: | |
33bf9176 | 2049 | nxm_execute_stack_pop(ofpact_get_STACK_POP(a), flow, &ctx->stack); |
9583bc14 EJ |
2050 | break; |
2051 | ||
2052 | case OFPACT_PUSH_MPLS: | |
9cfef3d0 | 2053 | compose_mpls_push_action(ctx, ofpact_get_PUSH_MPLS(a)->ethertype); |
9583bc14 EJ |
2054 | break; |
2055 | ||
2056 | case OFPACT_POP_MPLS: | |
9cfef3d0 | 2057 | compose_mpls_pop_action(ctx, ofpact_get_POP_MPLS(a)->ethertype); |
9583bc14 EJ |
2058 | break; |
2059 | ||
2060 | case OFPACT_SET_MPLS_TTL: | |
9cfef3d0 | 2061 | if (compose_set_mpls_ttl_action(ctx, |
9583bc14 EJ |
2062 | ofpact_get_SET_MPLS_TTL(a)->ttl)) { |
2063 | goto out; | |
2064 | } | |
2065 | break; | |
2066 | ||
2067 | case OFPACT_DEC_MPLS_TTL: | |
9cfef3d0 | 2068 | if (compose_dec_mpls_ttl_action(ctx)) { |
9583bc14 EJ |
2069 | goto out; |
2070 | } | |
2071 | break; | |
2072 | ||
2073 | case OFPACT_DEC_TTL: | |
9583bc14 EJ |
2074 | if (compose_dec_ttl(ctx, ofpact_get_DEC_TTL(a))) { |
2075 | goto out; | |
2076 | } | |
2077 | break; | |
2078 | ||
2079 | case OFPACT_NOTE: | |
2080 | /* Nothing to do. */ | |
2081 | break; | |
2082 | ||
2083 | case OFPACT_MULTIPATH: | |
33bf9176 | 2084 | multipath_execute(ofpact_get_MULTIPATH(a), flow, wc); |
9583bc14 EJ |
2085 | break; |
2086 | ||
2087 | case OFPACT_BUNDLE: | |
9583bc14 EJ |
2088 | xlate_bundle_action(ctx, ofpact_get_BUNDLE(a)); |
2089 | break; | |
2090 | ||
2091 | case OFPACT_OUTPUT_REG: | |
2092 | xlate_output_reg_action(ctx, ofpact_get_OUTPUT_REG(a)); | |
2093 | break; | |
2094 | ||
2095 | case OFPACT_LEARN: | |
2096 | xlate_learn_action(ctx, ofpact_get_LEARN(a)); | |
2097 | break; | |
2098 | ||
2099 | case OFPACT_EXIT: | |
2100 | ctx->exit = true; | |
2101 | break; | |
2102 | ||
2103 | case OFPACT_FIN_TIMEOUT: | |
33bf9176 | 2104 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
9583bc14 EJ |
2105 | ctx->xout->has_fin_timeout = true; |
2106 | xlate_fin_timeout(ctx, ofpact_get_FIN_TIMEOUT(a)); | |
2107 | break; | |
2108 | ||
2109 | case OFPACT_CLEAR_ACTIONS: | |
2110 | /* XXX | |
2111 | * Nothing to do because writa-actions is not supported for now. | |
2112 | * When writa-actions is supported, clear-actions also must | |
2113 | * be supported at the same time. | |
2114 | */ | |
2115 | break; | |
2116 | ||
2117 | case OFPACT_WRITE_METADATA: | |
2118 | metadata = ofpact_get_WRITE_METADATA(a); | |
33bf9176 BP |
2119 | flow->metadata &= ~metadata->mask; |
2120 | flow->metadata |= metadata->metadata & metadata->mask; | |
9583bc14 EJ |
2121 | break; |
2122 | ||
638a19b0 JR |
2123 | case OFPACT_METER: |
2124 | /* Not implemented yet. */ | |
2125 | break; | |
2126 | ||
9583bc14 EJ |
2127 | case OFPACT_GOTO_TABLE: { |
2128 | /* It is assumed that goto-table is the last action. */ | |
2129 | struct ofpact_goto_table *ogt = ofpact_get_GOTO_TABLE(a); | |
9583bc14 EJ |
2130 | |
2131 | ovs_assert(ctx->table_id < ogt->table_id); | |
4468099e EJ |
2132 | xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port, |
2133 | ogt->table_id, true); | |
9583bc14 EJ |
2134 | break; |
2135 | } | |
2136 | ||
2137 | case OFPACT_SAMPLE: | |
2138 | xlate_sample_action(ctx, ofpact_get_SAMPLE(a)); | |
2139 | break; | |
2140 | } | |
2141 | } | |
2142 | ||
2143 | out: | |
2144 | if (ctx->rule) { | |
2145 | ctx->rule->up.evictable = was_evictable; | |
2146 | } | |
2147 | } | |
2148 | ||
2149 | void | |
2150 | xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto, | |
2151 | const struct flow *flow, struct rule_dpif *rule, | |
2152 | uint8_t tcp_flags, const struct ofpbuf *packet) | |
2153 | { | |
2154 | xin->ofproto = ofproto; | |
2155 | xin->flow = *flow; | |
2156 | xin->packet = packet; | |
2157 | xin->may_learn = packet != NULL; | |
2158 | xin->rule = rule; | |
2159 | xin->ofpacts = NULL; | |
2160 | xin->ofpacts_len = 0; | |
2161 | xin->tcp_flags = tcp_flags; | |
2162 | xin->resubmit_hook = NULL; | |
2163 | xin->report_hook = NULL; | |
2164 | xin->resubmit_stats = NULL; | |
2165 | } | |
2166 | ||
2167 | void | |
2168 | xlate_out_uninit(struct xlate_out *xout) | |
2169 | { | |
2170 | if (xout) { | |
2171 | ofpbuf_uninit(&xout->odp_actions); | |
2172 | } | |
2173 | } | |
2174 | ||
2175 | /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts' | |
2176 | * into datapath actions, using 'ctx', and discards the datapath actions. */ | |
2177 | void | |
2178 | xlate_actions_for_side_effects(struct xlate_in *xin) | |
2179 | { | |
2180 | struct xlate_out xout; | |
2181 | ||
2182 | xlate_actions(xin, &xout); | |
2183 | xlate_out_uninit(&xout); | |
2184 | } | |
2185 | ||
2186 | static void | |
2187 | xlate_report(struct xlate_ctx *ctx, const char *s) | |
2188 | { | |
2189 | if (ctx->xin->report_hook) { | |
4d0acc70 | 2190 | ctx->xin->report_hook(ctx->xin, s, ctx->recurse); |
9583bc14 EJ |
2191 | } |
2192 | } | |
2193 | ||
2194 | void | |
2195 | xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src) | |
2196 | { | |
2197 | dst->wc = src->wc; | |
2198 | dst->tags = src->tags; | |
2199 | dst->slow = src->slow; | |
2200 | dst->has_learn = src->has_learn; | |
2201 | dst->has_normal = src->has_normal; | |
2202 | dst->has_fin_timeout = src->has_fin_timeout; | |
2203 | dst->nf_output_iface = src->nf_output_iface; | |
2204 | dst->mirrors = src->mirrors; | |
2205 | ||
2206 | ofpbuf_use_stub(&dst->odp_actions, dst->odp_actions_stub, | |
2207 | sizeof dst->odp_actions_stub); | |
2208 | ofpbuf_put(&dst->odp_actions, src->odp_actions.data, | |
2209 | src->odp_actions.size); | |
2210 | } | |
2211 | \f | |
ce4a6b76 BP |
2212 | static bool |
2213 | actions_output_to_local_port(const struct xlate_ctx *ctx) | |
2214 | { | |
46c88433 | 2215 | odp_port_t local_odp_port = ofp_port_to_odp_port(ctx->xbridge, OFPP_LOCAL); |
ce4a6b76 BP |
2216 | const struct nlattr *a; |
2217 | unsigned int left; | |
2218 | ||
2219 | NL_ATTR_FOR_EACH_UNSAFE (a, left, ctx->xout->odp_actions.data, | |
2220 | ctx->xout->odp_actions.size) { | |
2221 | if (nl_attr_type(a) == OVS_ACTION_ATTR_OUTPUT | |
2222 | && nl_attr_get_odp_port(a) == local_odp_port) { | |
2223 | return true; | |
2224 | } | |
2225 | } | |
2226 | return false; | |
2227 | } | |
9583bc14 EJ |
2228 | |
2229 | /* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts' | |
2230 | * into datapath actions in 'odp_actions', using 'ctx'. */ | |
2231 | void | |
2232 | xlate_actions(struct xlate_in *xin, struct xlate_out *xout) | |
2233 | { | |
2234 | /* Normally false. Set to true if we ever hit MAX_RESUBMIT_RECURSION, so | |
2235 | * that in the future we always keep a copy of the original flow for | |
2236 | * tracing purposes. */ | |
2237 | static bool hit_resubmit_limit; | |
2238 | ||
33bf9176 BP |
2239 | struct flow_wildcards *wc = &xout->wc; |
2240 | struct flow *flow = &xin->flow; | |
2241 | ||
9583bc14 EJ |
2242 | enum slow_path_reason special; |
2243 | const struct ofpact *ofpacts; | |
46c88433 | 2244 | struct xport *in_port; |
9583bc14 EJ |
2245 | struct flow orig_flow; |
2246 | struct xlate_ctx ctx; | |
2247 | size_t ofpacts_len; | |
2248 | ||
46c88433 | 2249 | COVERAGE_INC(xlate_actions); |
9583bc14 EJ |
2250 | |
2251 | /* Flow initialization rules: | |
2252 | * - 'base_flow' must match the kernel's view of the packet at the | |
2253 | * time that action processing starts. 'flow' represents any | |
2254 | * transformations we wish to make through actions. | |
2255 | * - By default 'base_flow' and 'flow' are the same since the input | |
2256 | * packet matches the output before any actions are applied. | |
2257 | * - When using VLAN splinters, 'base_flow''s VLAN is set to the value | |
2258 | * of the received packet as seen by the kernel. If we later output | |
2259 | * to another device without any modifications this will cause us to | |
2260 | * insert a new tag since the original one was stripped off by the | |
2261 | * VLAN device. | |
2262 | * - Tunnel metadata as received is retained in 'flow'. This allows | |
2263 | * tunnel metadata matching also in later tables. | |
2264 | * Since a kernel action for setting the tunnel metadata will only be | |
2265 | * generated with actual tunnel output, changing the tunnel metadata | |
2266 | * values in 'flow' (such as tun_id) will only have effect with a later | |
2267 | * tunnel output action. | |
2268 | * - Tunnel 'base_flow' is completely cleared since that is what the | |
2269 | * kernel does. If we wish to maintain the original values an action | |
2270 | * needs to be generated. */ | |
2271 | ||
2272 | ctx.xin = xin; | |
2273 | ctx.xout = xout; | |
46c88433 EJ |
2274 | ctx.xout->tags = 0; |
2275 | ctx.xout->slow = 0; | |
2276 | ctx.xout->has_learn = false; | |
2277 | ctx.xout->has_normal = false; | |
2278 | ctx.xout->has_fin_timeout = false; | |
2279 | ctx.xout->nf_output_iface = NF_OUT_DROP; | |
2280 | ctx.xout->mirrors = 0; | |
2281 | ofpbuf_use_stub(&ctx.xout->odp_actions, ctx.xout->odp_actions_stub, | |
2282 | sizeof ctx.xout->odp_actions_stub); | |
2283 | ofpbuf_reserve(&ctx.xout->odp_actions, NL_A_U32_SIZE); | |
2284 | ||
2285 | ctx.xbridge = xbridge_lookup(xin->ofproto); | |
2286 | if (!ctx.xbridge) { | |
2287 | return; | |
2288 | } | |
9583bc14 | 2289 | |
9583bc14 EJ |
2290 | ctx.rule = xin->rule; |
2291 | ||
33bf9176 | 2292 | ctx.base_flow = *flow; |
9583bc14 | 2293 | memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel); |
33bf9176 | 2294 | ctx.orig_tunnel_ip_dst = flow->tunnel.ip_dst; |
9583bc14 | 2295 | |
33bf9176 BP |
2296 | flow_wildcards_init_catchall(wc); |
2297 | memset(&wc->masks.in_port, 0xff, sizeof wc->masks.in_port); | |
1dd35f8a | 2298 | memset(&wc->masks.skb_priority, 0xff, sizeof wc->masks.skb_priority); |
7431e171 | 2299 | memset(&wc->masks.dl_type, 0xff, sizeof wc->masks.dl_type); |
1dd35f8a | 2300 | wc->masks.nw_frag |= FLOW_NW_FRAG_MASK; |
9583bc14 EJ |
2301 | |
2302 | if (tnl_port_should_receive(&ctx.xin->flow)) { | |
33bf9176 | 2303 | memset(&wc->masks.tunnel, 0xff, sizeof wc->masks.tunnel); |
9583bc14 | 2304 | } |
46c88433 | 2305 | if (ctx.xbridge->has_netflow) { |
9b658910 | 2306 | netflow_mask_wc(flow, wc); |
9583bc14 EJ |
2307 | } |
2308 | ||
9583bc14 EJ |
2309 | ctx.recurse = 0; |
2310 | ctx.max_resubmit_trigger = false; | |
33bf9176 | 2311 | ctx.orig_skb_priority = flow->skb_priority; |
9583bc14 EJ |
2312 | ctx.table_id = 0; |
2313 | ctx.exit = false; | |
2314 | ||
2315 | if (xin->ofpacts) { | |
2316 | ofpacts = xin->ofpacts; | |
2317 | ofpacts_len = xin->ofpacts_len; | |
2318 | } else if (xin->rule) { | |
2319 | ofpacts = xin->rule->up.ofpacts; | |
2320 | ofpacts_len = xin->rule->up.ofpacts_len; | |
2321 | } else { | |
2322 | NOT_REACHED(); | |
2323 | } | |
2324 | ||
2325 | ofpbuf_use_stub(&ctx.stack, ctx.init_stack, sizeof ctx.init_stack); | |
2326 | ||
46c88433 | 2327 | if (mbridge_has_mirrors(ctx.xbridge->mbridge) || hit_resubmit_limit) { |
9583bc14 EJ |
2328 | /* Do this conditionally because the copy is expensive enough that it |
2329 | * shows up in profiles. */ | |
33bf9176 | 2330 | orig_flow = *flow; |
9583bc14 EJ |
2331 | } |
2332 | ||
33bf9176 | 2333 | if (flow->nw_frag & FLOW_NW_FRAG_ANY) { |
46c88433 | 2334 | switch (ctx.xbridge->frag) { |
9583bc14 EJ |
2335 | case OFPC_FRAG_NORMAL: |
2336 | /* We must pretend that transport ports are unavailable. */ | |
33bf9176 BP |
2337 | flow->tp_src = ctx.base_flow.tp_src = htons(0); |
2338 | flow->tp_dst = ctx.base_flow.tp_dst = htons(0); | |
9583bc14 EJ |
2339 | break; |
2340 | ||
2341 | case OFPC_FRAG_DROP: | |
2342 | return; | |
2343 | ||
2344 | case OFPC_FRAG_REASM: | |
2345 | NOT_REACHED(); | |
2346 | ||
2347 | case OFPC_FRAG_NX_MATCH: | |
2348 | /* Nothing to do. */ | |
2349 | break; | |
2350 | ||
2351 | case OFPC_INVALID_TTL_TO_CONTROLLER: | |
2352 | NOT_REACHED(); | |
2353 | } | |
2354 | } | |
2355 | ||
46c88433 | 2356 | in_port = get_ofp_port(ctx.xbridge, flow->in_port.ofp_port); |
642dc74d | 2357 | special = process_special(&ctx, flow, in_port, ctx.xin->packet); |
9583bc14 EJ |
2358 | if (special) { |
2359 | ctx.xout->slow = special; | |
2360 | } else { | |
2361 | static struct vlog_rate_limit trace_rl = VLOG_RATE_LIMIT_INIT(1, 1); | |
2362 | size_t sample_actions_len; | |
9583bc14 | 2363 | |
4e022ec0 | 2364 | if (flow->in_port.ofp_port |
46c88433 EJ |
2365 | != vsp_realdev_to_vlandev(ctx.xbridge->ofproto, |
2366 | flow->in_port.ofp_port, | |
33bf9176 | 2367 | flow->vlan_tci)) { |
9583bc14 EJ |
2368 | ctx.base_flow.vlan_tci = 0; |
2369 | } | |
2370 | ||
2371 | add_sflow_action(&ctx); | |
2372 | add_ipfix_action(&ctx); | |
2373 | sample_actions_len = ctx.xout->odp_actions.size; | |
2374 | ||
2375 | if (tunnel_ecn_ok(&ctx) && (!in_port || may_receive(in_port, &ctx))) { | |
2376 | do_xlate_actions(ofpacts, ofpacts_len, &ctx); | |
2377 | ||
2378 | /* We've let OFPP_NORMAL and the learning action look at the | |
2379 | * packet, so drop it now if forwarding is disabled. */ | |
2380 | if (in_port && !stp_forward_in_state(in_port->stp_state)) { | |
2381 | ctx.xout->odp_actions.size = sample_actions_len; | |
2382 | } | |
2383 | } | |
2384 | ||
2385 | if (ctx.max_resubmit_trigger && !ctx.xin->resubmit_hook) { | |
2386 | if (!hit_resubmit_limit) { | |
2387 | /* We didn't record the original flow. Make sure we do from | |
2388 | * now on. */ | |
2389 | hit_resubmit_limit = true; | |
2390 | } else if (!VLOG_DROP_ERR(&trace_rl)) { | |
2391 | struct ds ds = DS_EMPTY_INITIALIZER; | |
2392 | ||
46c88433 EJ |
2393 | ofproto_trace(ctx.xbridge->ofproto, &orig_flow, |
2394 | ctx.xin->packet, &ds); | |
9583bc14 EJ |
2395 | VLOG_ERR("Trace triggered by excessive resubmit " |
2396 | "recursion:\n%s", ds_cstr(&ds)); | |
2397 | ds_destroy(&ds); | |
2398 | } | |
2399 | } | |
2400 | ||
46c88433 | 2401 | if (ctx.xbridge->has_in_band |
ce4a6b76 BP |
2402 | && in_band_must_output_to_local_port(flow) |
2403 | && !actions_output_to_local_port(&ctx)) { | |
9583bc14 EJ |
2404 | compose_output_action(&ctx, OFPP_LOCAL); |
2405 | } | |
aaa0fbae EJ |
2406 | |
2407 | fix_sflow_action(&ctx); | |
2408 | ||
46c88433 | 2409 | if (mbridge_has_mirrors(ctx.xbridge->mbridge)) { |
9583bc14 EJ |
2410 | add_mirror_actions(&ctx, &orig_flow); |
2411 | } | |
9583bc14 EJ |
2412 | } |
2413 | ||
2414 | ofpbuf_uninit(&ctx.stack); | |
2415 | ||
2416 | /* Clear the metadata and register wildcard masks, because we won't | |
2417 | * use non-header fields as part of the cache. */ | |
33bf9176 BP |
2418 | memset(&wc->masks.metadata, 0, sizeof wc->masks.metadata); |
2419 | memset(&wc->masks.regs, 0, sizeof wc->masks.regs); | |
9583bc14 | 2420 | } |