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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. */ | |
89a8a7f0 | 64 | struct dpif *dpif; /* Datapath interface. */ |
46c88433 EJ |
65 | struct mac_learning *ml; /* Mac learning handle. */ |
66 | struct mbridge *mbridge; /* Mirroring. */ | |
67 | struct dpif_sflow *sflow; /* SFlow handle, or null. */ | |
68 | struct dpif_ipfix *ipfix; /* Ipfix handle, or null. */ | |
9d189a50 | 69 | struct stp *stp; /* STP or null if disabled. */ |
46c88433 EJ |
70 | |
71 | enum ofp_config_flags frag; /* Fragmentation handling. */ | |
46c88433 EJ |
72 | bool has_netflow; /* Bridge runs netflow? */ |
73 | bool has_in_band; /* Bridge has in band control? */ | |
74 | bool forward_bpdu; /* Bridge forwards STP BPDUs? */ | |
75 | }; | |
76 | ||
77 | struct xbundle { | |
78 | struct hmap_node hmap_node; /* In global 'xbundles' map. */ | |
79 | struct ofbundle *ofbundle; /* Key in global 'xbundles' map. */ | |
80 | ||
81 | struct list list_node; /* In parent 'xbridges' list. */ | |
82 | struct xbridge *xbridge; /* Parent xbridge. */ | |
83 | ||
84 | struct list xports; /* Contains "struct xport"s. */ | |
85 | ||
86 | char *name; /* Name used in log messages. */ | |
87 | struct bond *bond; /* Nonnull iff more than one port. */ | |
88 | struct lacp *lacp; /* LACP handle or null. */ | |
89 | ||
90 | enum port_vlan_mode vlan_mode; /* VLAN mode. */ | |
91 | int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */ | |
92 | unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1. | |
93 | * NULL if all VLANs are trunked. */ | |
94 | bool use_priority_tags; /* Use 802.1p tag for frames in VLAN 0? */ | |
95 | bool floodable; /* No port has OFPUTIL_PC_NO_FLOOD set? */ | |
96 | }; | |
97 | ||
98 | struct xport { | |
99 | struct hmap_node hmap_node; /* Node in global 'xports' map. */ | |
100 | struct ofport_dpif *ofport; /* Key in global 'xports map. */ | |
101 | ||
102 | struct hmap_node ofp_node; /* Node in parent xbridge 'xports' map. */ | |
103 | ofp_port_t ofp_port; /* Key in parent xbridge 'xports' map. */ | |
104 | ||
105 | odp_port_t odp_port; /* Datapath port number or ODPP_NONE. */ | |
106 | ||
107 | struct list bundle_node; /* In parent xbundle (if it exists). */ | |
108 | struct xbundle *xbundle; /* Parent xbundle or null. */ | |
109 | ||
110 | struct netdev *netdev; /* 'ofport''s netdev. */ | |
111 | ||
112 | struct xbridge *xbridge; /* Parent bridge. */ | |
113 | struct xport *peer; /* Patch port peer or null. */ | |
114 | ||
115 | enum ofputil_port_config config; /* OpenFlow port configuration. */ | |
9d189a50 | 116 | int stp_port_no; /* STP port number or 0 if not in use. */ |
46c88433 | 117 | |
55954f6e EJ |
118 | struct hmap skb_priorities; /* Map of 'skb_priority_to_dscp's. */ |
119 | ||
46c88433 EJ |
120 | bool may_enable; /* May be enabled in bonds. */ |
121 | bool is_tunnel; /* Is a tunnel port. */ | |
122 | ||
123 | struct cfm *cfm; /* CFM handle or null. */ | |
124 | struct bfd *bfd; /* BFD handle or null. */ | |
125 | }; | |
126 | ||
4d0acc70 EJ |
127 | struct xlate_ctx { |
128 | struct xlate_in *xin; | |
129 | struct xlate_out *xout; | |
130 | ||
46c88433 | 131 | const struct xbridge *xbridge; |
4d0acc70 EJ |
132 | |
133 | /* Flow at the last commit. */ | |
134 | struct flow base_flow; | |
135 | ||
136 | /* Tunnel IP destination address as received. This is stored separately | |
137 | * as the base_flow.tunnel is cleared on init to reflect the datapath | |
138 | * behavior. Used to make sure not to send tunneled output to ourselves, | |
139 | * which might lead to an infinite loop. This could happen easily | |
140 | * if a tunnel is marked as 'ip_remote=flow', and the flow does not | |
141 | * actually set the tun_dst field. */ | |
142 | ovs_be32 orig_tunnel_ip_dst; | |
143 | ||
144 | /* Stack for the push and pop actions. Each stack element is of type | |
145 | * "union mf_subvalue". */ | |
146 | union mf_subvalue init_stack[1024 / sizeof(union mf_subvalue)]; | |
147 | struct ofpbuf stack; | |
148 | ||
149 | /* The rule that we are currently translating, or NULL. */ | |
150 | struct rule_dpif *rule; | |
151 | ||
152 | int recurse; /* Recursion level, via xlate_table_action. */ | |
4d0acc70 EJ |
153 | uint32_t orig_skb_priority; /* Priority when packet arrived. */ |
154 | uint8_t table_id; /* OpenFlow table ID where flow was found. */ | |
155 | uint32_t sflow_n_outputs; /* Number of output ports. */ | |
4e022ec0 | 156 | odp_port_t sflow_odp_port; /* Output port for composing sFlow action. */ |
4d0acc70 EJ |
157 | uint16_t user_cookie_offset;/* Used for user_action_cookie fixup. */ |
158 | bool exit; /* No further actions should be processed. */ | |
159 | }; | |
160 | ||
9583bc14 EJ |
161 | /* A controller may use OFPP_NONE as the ingress port to indicate that |
162 | * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for | |
163 | * when an input bundle is needed for validation (e.g., mirroring or | |
164 | * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have | |
3815d6c2 LS |
165 | * any 'port' structs, so care must be taken when dealing with it. |
166 | * The bundle's name and vlan mode are initialized in lookup_input_bundle() */ | |
167 | static struct xbundle ofpp_none_bundle; | |
9583bc14 | 168 | |
55954f6e EJ |
169 | /* Node in 'xport''s 'skb_priorities' map. Used to maintain a map from |
170 | * 'priority' (the datapath's term for QoS queue) to the dscp bits which all | |
171 | * traffic egressing the 'ofport' with that priority should be marked with. */ | |
172 | struct skb_priority_to_dscp { | |
173 | struct hmap_node hmap_node; /* Node in 'ofport_dpif''s 'skb_priorities'. */ | |
174 | uint32_t skb_priority; /* Priority of this queue (see struct flow). */ | |
175 | ||
176 | uint8_t dscp; /* DSCP bits to mark outgoing traffic with. */ | |
177 | }; | |
178 | ||
46c88433 EJ |
179 | static struct hmap xbridges = HMAP_INITIALIZER(&xbridges); |
180 | static struct hmap xbundles = HMAP_INITIALIZER(&xbundles); | |
181 | static struct hmap xports = HMAP_INITIALIZER(&xports); | |
182 | ||
183 | static bool may_receive(const struct xport *, struct xlate_ctx *); | |
9583bc14 EJ |
184 | static void do_xlate_actions(const struct ofpact *, size_t ofpacts_len, |
185 | struct xlate_ctx *); | |
186 | static void xlate_normal(struct xlate_ctx *); | |
187 | static void xlate_report(struct xlate_ctx *, const char *); | |
4e022ec0 | 188 | static void xlate_table_action(struct xlate_ctx *, ofp_port_t in_port, |
9583bc14 | 189 | uint8_t table_id, bool may_packet_in); |
46c88433 EJ |
190 | static bool input_vid_is_valid(uint16_t vid, struct xbundle *, bool warn); |
191 | static uint16_t input_vid_to_vlan(const struct xbundle *, uint16_t vid); | |
192 | static void output_normal(struct xlate_ctx *, const struct xbundle *, | |
9583bc14 | 193 | uint16_t vlan); |
4e022ec0 | 194 | static void compose_output_action(struct xlate_ctx *, ofp_port_t ofp_port); |
9583bc14 EJ |
195 | |
196 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
197 | ||
46c88433 EJ |
198 | static struct xbridge *xbridge_lookup(const struct ofproto_dpif *); |
199 | static struct xbundle *xbundle_lookup(const struct ofbundle *); | |
5e6af486 | 200 | static struct xport *xport_lookup(const struct ofport_dpif *); |
46c88433 | 201 | static struct xport *get_ofp_port(const struct xbridge *, ofp_port_t ofp_port); |
55954f6e EJ |
202 | static struct skb_priority_to_dscp *get_skb_priority(const struct xport *, |
203 | uint32_t skb_priority); | |
204 | static void clear_skb_priorities(struct xport *); | |
205 | static bool dscp_from_skb_priority(const struct xport *, uint32_t skb_priority, | |
206 | uint8_t *dscp); | |
46c88433 EJ |
207 | |
208 | void | |
209 | xlate_ofproto_set(struct ofproto_dpif *ofproto, const char *name, | |
89a8a7f0 EJ |
210 | struct dpif *dpif, const struct mac_learning *ml, |
211 | struct stp *stp, const struct mbridge *mbridge, | |
46c88433 EJ |
212 | const struct dpif_sflow *sflow, |
213 | const struct dpif_ipfix *ipfix, enum ofp_config_flags frag, | |
9d189a50 | 214 | bool forward_bpdu, bool has_in_band, bool has_netflow) |
46c88433 EJ |
215 | { |
216 | struct xbridge *xbridge = xbridge_lookup(ofproto); | |
217 | ||
218 | if (!xbridge) { | |
219 | xbridge = xzalloc(sizeof *xbridge); | |
220 | xbridge->ofproto = ofproto; | |
221 | ||
222 | hmap_insert(&xbridges, &xbridge->hmap_node, hash_pointer(ofproto, 0)); | |
223 | hmap_init(&xbridge->xports); | |
224 | list_init(&xbridge->xbundles); | |
225 | } | |
226 | ||
227 | if (xbridge->ml != ml) { | |
228 | mac_learning_unref(xbridge->ml); | |
229 | xbridge->ml = mac_learning_ref(ml); | |
230 | } | |
231 | ||
232 | if (xbridge->mbridge != mbridge) { | |
233 | mbridge_unref(xbridge->mbridge); | |
234 | xbridge->mbridge = mbridge_ref(mbridge); | |
235 | } | |
236 | ||
237 | if (xbridge->sflow != sflow) { | |
238 | dpif_sflow_unref(xbridge->sflow); | |
239 | xbridge->sflow = dpif_sflow_ref(sflow); | |
240 | } | |
241 | ||
242 | if (xbridge->ipfix != ipfix) { | |
243 | dpif_ipfix_unref(xbridge->ipfix); | |
244 | xbridge->ipfix = dpif_ipfix_ref(ipfix); | |
245 | } | |
246 | ||
9d189a50 EJ |
247 | if (xbridge->stp != stp) { |
248 | stp_unref(xbridge->stp); | |
249 | xbridge->stp = stp_ref(stp); | |
250 | } | |
251 | ||
46c88433 EJ |
252 | free(xbridge->name); |
253 | xbridge->name = xstrdup(name); | |
254 | ||
89a8a7f0 | 255 | xbridge->dpif = dpif; |
46c88433 EJ |
256 | xbridge->forward_bpdu = forward_bpdu; |
257 | xbridge->has_in_band = has_in_band; | |
258 | xbridge->has_netflow = has_netflow; | |
46c88433 EJ |
259 | xbridge->frag = frag; |
260 | } | |
261 | ||
262 | void | |
263 | xlate_remove_ofproto(struct ofproto_dpif *ofproto) | |
264 | { | |
265 | struct xbridge *xbridge = xbridge_lookup(ofproto); | |
266 | struct xbundle *xbundle, *next_xbundle; | |
267 | struct xport *xport, *next_xport; | |
268 | ||
269 | if (!xbridge) { | |
270 | return; | |
271 | } | |
272 | ||
273 | HMAP_FOR_EACH_SAFE (xport, next_xport, ofp_node, &xbridge->xports) { | |
274 | xlate_ofport_remove(xport->ofport); | |
275 | } | |
276 | ||
277 | LIST_FOR_EACH_SAFE (xbundle, next_xbundle, list_node, &xbridge->xbundles) { | |
278 | xlate_bundle_remove(xbundle->ofbundle); | |
279 | } | |
280 | ||
281 | hmap_remove(&xbridges, &xbridge->hmap_node); | |
282 | free(xbridge->name); | |
283 | free(xbridge); | |
284 | } | |
285 | ||
286 | void | |
287 | xlate_bundle_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle, | |
288 | const char *name, enum port_vlan_mode vlan_mode, int vlan, | |
289 | unsigned long *trunks, bool use_priority_tags, | |
290 | const struct bond *bond, const struct lacp *lacp, | |
291 | bool floodable) | |
292 | { | |
293 | struct xbundle *xbundle = xbundle_lookup(ofbundle); | |
294 | ||
295 | if (!xbundle) { | |
296 | xbundle = xzalloc(sizeof *xbundle); | |
297 | xbundle->ofbundle = ofbundle; | |
298 | xbundle->xbridge = xbridge_lookup(ofproto); | |
299 | ||
300 | hmap_insert(&xbundles, &xbundle->hmap_node, hash_pointer(ofbundle, 0)); | |
301 | list_insert(&xbundle->xbridge->xbundles, &xbundle->list_node); | |
302 | list_init(&xbundle->xports); | |
303 | } | |
304 | ||
305 | ovs_assert(xbundle->xbridge); | |
306 | ||
307 | free(xbundle->name); | |
308 | xbundle->name = xstrdup(name); | |
309 | ||
310 | xbundle->vlan_mode = vlan_mode; | |
311 | xbundle->vlan = vlan; | |
312 | xbundle->trunks = trunks; | |
313 | xbundle->use_priority_tags = use_priority_tags; | |
314 | xbundle->floodable = floodable; | |
315 | ||
316 | if (xbundle->bond != bond) { | |
317 | bond_unref(xbundle->bond); | |
318 | xbundle->bond = bond_ref(bond); | |
319 | } | |
320 | ||
321 | if (xbundle->lacp != lacp) { | |
322 | lacp_unref(xbundle->lacp); | |
323 | xbundle->lacp = lacp_ref(lacp); | |
324 | } | |
325 | } | |
326 | ||
327 | void | |
328 | xlate_bundle_remove(struct ofbundle *ofbundle) | |
329 | { | |
330 | struct xbundle *xbundle = xbundle_lookup(ofbundle); | |
331 | struct xport *xport, *next; | |
332 | ||
333 | if (!xbundle) { | |
334 | return; | |
335 | } | |
336 | ||
337 | LIST_FOR_EACH_SAFE (xport, next, bundle_node, &xbundle->xports) { | |
338 | list_remove(&xport->bundle_node); | |
339 | xport->xbundle = NULL; | |
340 | } | |
341 | ||
342 | hmap_remove(&xbundles, &xbundle->hmap_node); | |
343 | list_remove(&xbundle->list_node); | |
344 | bond_unref(xbundle->bond); | |
345 | lacp_unref(xbundle->lacp); | |
346 | free(xbundle->name); | |
347 | free(xbundle); | |
348 | } | |
349 | ||
350 | void | |
351 | xlate_ofport_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle, | |
352 | struct ofport_dpif *ofport, ofp_port_t ofp_port, | |
353 | odp_port_t odp_port, const struct netdev *netdev, | |
354 | const struct cfm *cfm, const struct bfd *bfd, | |
9d189a50 | 355 | struct ofport_dpif *peer, int stp_port_no, |
55954f6e | 356 | const struct ofproto_port_queue *qdscp_list, size_t n_qdscp, |
9d189a50 EJ |
357 | enum ofputil_port_config config, bool is_tunnel, |
358 | bool may_enable) | |
46c88433 EJ |
359 | { |
360 | struct xport *xport = xport_lookup(ofport); | |
55954f6e | 361 | size_t i; |
46c88433 EJ |
362 | |
363 | if (!xport) { | |
364 | xport = xzalloc(sizeof *xport); | |
365 | xport->ofport = ofport; | |
366 | xport->xbridge = xbridge_lookup(ofproto); | |
367 | xport->ofp_port = ofp_port; | |
368 | ||
55954f6e | 369 | hmap_init(&xport->skb_priorities); |
46c88433 EJ |
370 | hmap_insert(&xports, &xport->hmap_node, hash_pointer(ofport, 0)); |
371 | hmap_insert(&xport->xbridge->xports, &xport->ofp_node, | |
372 | hash_ofp_port(xport->ofp_port)); | |
373 | } | |
374 | ||
375 | ovs_assert(xport->ofp_port == ofp_port); | |
376 | ||
377 | xport->config = config; | |
9d189a50 | 378 | xport->stp_port_no = stp_port_no; |
46c88433 EJ |
379 | xport->is_tunnel = is_tunnel; |
380 | xport->may_enable = may_enable; | |
381 | xport->odp_port = odp_port; | |
382 | ||
383 | if (xport->netdev != netdev) { | |
384 | netdev_close(xport->netdev); | |
385 | xport->netdev = netdev_ref(netdev); | |
386 | } | |
387 | ||
388 | if (xport->cfm != cfm) { | |
389 | cfm_unref(xport->cfm); | |
390 | xport->cfm = cfm_ref(cfm); | |
391 | } | |
392 | ||
393 | if (xport->bfd != bfd) { | |
394 | bfd_unref(xport->bfd); | |
395 | xport->bfd = bfd_ref(bfd); | |
396 | } | |
397 | ||
398 | if (xport->peer) { | |
399 | xport->peer->peer = NULL; | |
400 | } | |
5e6af486 | 401 | xport->peer = xport_lookup(peer); |
46c88433 EJ |
402 | if (xport->peer) { |
403 | xport->peer->peer = xport; | |
404 | } | |
405 | ||
406 | if (xport->xbundle) { | |
407 | list_remove(&xport->bundle_node); | |
408 | } | |
5e6af486 | 409 | xport->xbundle = xbundle_lookup(ofbundle); |
46c88433 EJ |
410 | if (xport->xbundle) { |
411 | list_insert(&xport->xbundle->xports, &xport->bundle_node); | |
412 | } | |
55954f6e EJ |
413 | |
414 | clear_skb_priorities(xport); | |
415 | for (i = 0; i < n_qdscp; i++) { | |
416 | struct skb_priority_to_dscp *pdscp; | |
417 | uint32_t skb_priority; | |
418 | ||
89a8a7f0 EJ |
419 | if (dpif_queue_to_priority(xport->xbridge->dpif, qdscp_list[i].queue, |
420 | &skb_priority)) { | |
55954f6e EJ |
421 | continue; |
422 | } | |
423 | ||
424 | pdscp = xmalloc(sizeof *pdscp); | |
425 | pdscp->skb_priority = skb_priority; | |
426 | pdscp->dscp = (qdscp_list[i].dscp << 2) & IP_DSCP_MASK; | |
427 | hmap_insert(&xport->skb_priorities, &pdscp->hmap_node, | |
428 | hash_int(pdscp->skb_priority, 0)); | |
429 | } | |
46c88433 EJ |
430 | } |
431 | ||
432 | void | |
433 | xlate_ofport_remove(struct ofport_dpif *ofport) | |
434 | { | |
435 | struct xport *xport = xport_lookup(ofport); | |
436 | ||
437 | if (!xport) { | |
438 | return; | |
439 | } | |
440 | ||
441 | if (xport->peer) { | |
442 | xport->peer->peer = NULL; | |
443 | xport->peer = NULL; | |
444 | } | |
445 | ||
e621a12d EJ |
446 | if (xport->xbundle) { |
447 | list_remove(&xport->bundle_node); | |
448 | } | |
449 | ||
55954f6e EJ |
450 | clear_skb_priorities(xport); |
451 | hmap_destroy(&xport->skb_priorities); | |
452 | ||
46c88433 EJ |
453 | hmap_remove(&xports, &xport->hmap_node); |
454 | hmap_remove(&xport->xbridge->xports, &xport->ofp_node); | |
455 | ||
456 | netdev_close(xport->netdev); | |
457 | cfm_unref(xport->cfm); | |
458 | bfd_unref(xport->bfd); | |
459 | free(xport); | |
460 | } | |
461 | ||
462 | static struct xbridge * | |
463 | xbridge_lookup(const struct ofproto_dpif *ofproto) | |
464 | { | |
465 | struct xbridge *xbridge; | |
466 | ||
5e6af486 EJ |
467 | if (!ofproto) { |
468 | return NULL; | |
469 | } | |
470 | ||
46c88433 EJ |
471 | HMAP_FOR_EACH_IN_BUCKET (xbridge, hmap_node, hash_pointer(ofproto, 0), |
472 | &xbridges) { | |
473 | if (xbridge->ofproto == ofproto) { | |
474 | return xbridge; | |
475 | } | |
476 | } | |
477 | return NULL; | |
478 | } | |
479 | ||
480 | static struct xbundle * | |
481 | xbundle_lookup(const struct ofbundle *ofbundle) | |
482 | { | |
483 | struct xbundle *xbundle; | |
484 | ||
5e6af486 EJ |
485 | if (!ofbundle) { |
486 | return NULL; | |
487 | } | |
488 | ||
46c88433 EJ |
489 | HMAP_FOR_EACH_IN_BUCKET (xbundle, hmap_node, hash_pointer(ofbundle, 0), |
490 | &xbundles) { | |
491 | if (xbundle->ofbundle == ofbundle) { | |
492 | return xbundle; | |
493 | } | |
494 | } | |
495 | return NULL; | |
496 | } | |
497 | ||
498 | static struct xport * | |
5e6af486 | 499 | xport_lookup(const struct ofport_dpif *ofport) |
46c88433 EJ |
500 | { |
501 | struct xport *xport; | |
502 | ||
5e6af486 EJ |
503 | if (!ofport) { |
504 | return NULL; | |
505 | } | |
506 | ||
46c88433 EJ |
507 | HMAP_FOR_EACH_IN_BUCKET (xport, hmap_node, hash_pointer(ofport, 0), |
508 | &xports) { | |
509 | if (xport->ofport == ofport) { | |
510 | return xport; | |
511 | } | |
512 | } | |
513 | return NULL; | |
514 | } | |
515 | ||
40085e56 EJ |
516 | static struct stp_port * |
517 | xport_get_stp_port(const struct xport *xport) | |
518 | { | |
519 | return xport->xbridge->stp && xport->stp_port_no | |
520 | ? stp_get_port(xport->xbridge->stp, xport->stp_port_no) | |
521 | : NULL; | |
522 | } | |
9d189a50 EJ |
523 | |
524 | static enum stp_state | |
525 | xport_stp_learn_state(const struct xport *xport) | |
526 | { | |
40085e56 EJ |
527 | struct stp_port *sp = xport_get_stp_port(xport); |
528 | return stp_learn_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED); | |
9d189a50 EJ |
529 | } |
530 | ||
531 | static bool | |
532 | xport_stp_forward_state(const struct xport *xport) | |
533 | { | |
40085e56 EJ |
534 | struct stp_port *sp = xport_get_stp_port(xport); |
535 | return stp_forward_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED); | |
9d189a50 EJ |
536 | } |
537 | ||
538 | /* Returns true if STP should process 'flow'. Sets fields in 'wc' that | |
539 | * were used to make the determination.*/ | |
540 | static bool | |
541 | stp_should_process_flow(const struct flow *flow, struct flow_wildcards *wc) | |
542 | { | |
543 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
544 | return eth_addr_equals(flow->dl_dst, eth_addr_stp); | |
545 | } | |
546 | ||
547 | static void | |
548 | stp_process_packet(const struct xport *xport, const struct ofpbuf *packet) | |
549 | { | |
40085e56 | 550 | struct stp_port *sp = xport_get_stp_port(xport); |
9d189a50 EJ |
551 | struct ofpbuf payload = *packet; |
552 | struct eth_header *eth = payload.data; | |
9d189a50 EJ |
553 | |
554 | /* Sink packets on ports that have STP disabled when the bridge has | |
555 | * STP enabled. */ | |
556 | if (!sp || stp_port_get_state(sp) == STP_DISABLED) { | |
557 | return; | |
558 | } | |
559 | ||
560 | /* Trim off padding on payload. */ | |
561 | if (payload.size > ntohs(eth->eth_type) + ETH_HEADER_LEN) { | |
562 | payload.size = ntohs(eth->eth_type) + ETH_HEADER_LEN; | |
563 | } | |
564 | ||
565 | if (ofpbuf_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) { | |
566 | stp_received_bpdu(sp, payload.data, payload.size); | |
567 | } | |
568 | } | |
569 | ||
46c88433 EJ |
570 | static struct xport * |
571 | get_ofp_port(const struct xbridge *xbridge, ofp_port_t ofp_port) | |
572 | { | |
573 | struct xport *xport; | |
574 | ||
575 | HMAP_FOR_EACH_IN_BUCKET (xport, ofp_node, hash_ofp_port(ofp_port), | |
576 | &xbridge->xports) { | |
577 | if (xport->ofp_port == ofp_port) { | |
578 | return xport; | |
579 | } | |
580 | } | |
581 | return NULL; | |
582 | } | |
583 | ||
584 | static odp_port_t | |
585 | ofp_port_to_odp_port(const struct xbridge *xbridge, ofp_port_t ofp_port) | |
586 | { | |
587 | const struct xport *xport = get_ofp_port(xbridge, ofp_port); | |
588 | return xport ? xport->odp_port : ODPP_NONE; | |
589 | } | |
590 | ||
9583bc14 | 591 | static bool |
46c88433 | 592 | xbundle_trunks_vlan(const struct xbundle *bundle, uint16_t vlan) |
9583bc14 EJ |
593 | { |
594 | return (bundle->vlan_mode != PORT_VLAN_ACCESS | |
595 | && (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan))); | |
596 | } | |
597 | ||
598 | static bool | |
46c88433 EJ |
599 | xbundle_includes_vlan(const struct xbundle *xbundle, uint16_t vlan) |
600 | { | |
601 | return vlan == xbundle->vlan || xbundle_trunks_vlan(xbundle, vlan); | |
602 | } | |
603 | ||
604 | static mirror_mask_t | |
605 | xbundle_mirror_out(const struct xbridge *xbridge, struct xbundle *xbundle) | |
606 | { | |
607 | return xbundle != &ofpp_none_bundle | |
608 | ? mirror_bundle_out(xbridge->mbridge, xbundle->ofbundle) | |
609 | : 0; | |
610 | } | |
611 | ||
612 | static mirror_mask_t | |
613 | xbundle_mirror_src(const struct xbridge *xbridge, struct xbundle *xbundle) | |
9583bc14 | 614 | { |
46c88433 EJ |
615 | return xbundle != &ofpp_none_bundle |
616 | ? mirror_bundle_src(xbridge->mbridge, xbundle->ofbundle) | |
617 | : 0; | |
9583bc14 EJ |
618 | } |
619 | ||
46c88433 EJ |
620 | static mirror_mask_t |
621 | xbundle_mirror_dst(const struct xbridge *xbridge, struct xbundle *xbundle) | |
9583bc14 | 622 | { |
46c88433 EJ |
623 | return xbundle != &ofpp_none_bundle |
624 | ? mirror_bundle_dst(xbridge->mbridge, xbundle->ofbundle) | |
625 | : 0; | |
626 | } | |
627 | ||
628 | static struct xbundle * | |
629 | lookup_input_bundle(const struct xbridge *xbridge, ofp_port_t in_port, | |
630 | bool warn, struct xport **in_xportp) | |
631 | { | |
632 | struct xport *xport; | |
9583bc14 EJ |
633 | |
634 | /* Find the port and bundle for the received packet. */ | |
46c88433 EJ |
635 | xport = get_ofp_port(xbridge, in_port); |
636 | if (in_xportp) { | |
637 | *in_xportp = xport; | |
9583bc14 | 638 | } |
46c88433 EJ |
639 | if (xport && xport->xbundle) { |
640 | return xport->xbundle; | |
9583bc14 EJ |
641 | } |
642 | ||
643 | /* Special-case OFPP_NONE, which a controller may use as the ingress | |
644 | * port for traffic that it is sourcing. */ | |
645 | if (in_port == OFPP_NONE) { | |
3815d6c2 LS |
646 | ofpp_none_bundle.name = "OFPP_NONE"; |
647 | ofpp_none_bundle.vlan_mode = PORT_VLAN_TRUNK; | |
9583bc14 EJ |
648 | return &ofpp_none_bundle; |
649 | } | |
650 | ||
651 | /* Odd. A few possible reasons here: | |
652 | * | |
653 | * - We deleted a port but there are still a few packets queued up | |
654 | * from it. | |
655 | * | |
656 | * - Someone externally added a port (e.g. "ovs-dpctl add-if") that | |
657 | * we don't know about. | |
658 | * | |
659 | * - The ofproto client didn't configure the port as part of a bundle. | |
660 | * This is particularly likely to happen if a packet was received on the | |
661 | * port after it was created, but before the client had a chance to | |
662 | * configure its bundle. | |
663 | */ | |
664 | if (warn) { | |
665 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
666 | ||
667 | VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown " | |
46c88433 | 668 | "port %"PRIu16, xbridge->name, in_port); |
9583bc14 EJ |
669 | } |
670 | return NULL; | |
671 | } | |
672 | ||
673 | static void | |
674 | add_mirror_actions(struct xlate_ctx *ctx, const struct flow *orig_flow) | |
675 | { | |
46c88433 | 676 | const struct xbridge *xbridge = ctx->xbridge; |
9583bc14 | 677 | mirror_mask_t mirrors; |
46c88433 | 678 | struct xbundle *in_xbundle; |
9583bc14 EJ |
679 | uint16_t vlan; |
680 | uint16_t vid; | |
cdf5d3a5 EJ |
681 | |
682 | mirrors = ctx->xout->mirrors; | |
683 | ctx->xout->mirrors = 0; | |
9583bc14 | 684 | |
46c88433 EJ |
685 | in_xbundle = lookup_input_bundle(xbridge, orig_flow->in_port.ofp_port, |
686 | ctx->xin->packet != NULL, NULL); | |
687 | if (!in_xbundle) { | |
9583bc14 EJ |
688 | return; |
689 | } | |
46c88433 | 690 | mirrors |= xbundle_mirror_src(xbridge, in_xbundle); |
9583bc14 EJ |
691 | |
692 | /* Drop frames on bundles reserved for mirroring. */ | |
46c88433 | 693 | if (xbundle_mirror_out(xbridge, in_xbundle)) { |
9583bc14 EJ |
694 | if (ctx->xin->packet != NULL) { |
695 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
696 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port " | |
697 | "%s, which is reserved exclusively for mirroring", | |
46c88433 | 698 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 | 699 | } |
aaa0fbae | 700 | ofpbuf_clear(&ctx->xout->odp_actions); |
9583bc14 EJ |
701 | return; |
702 | } | |
703 | ||
704 | /* Check VLAN. */ | |
705 | vid = vlan_tci_to_vid(orig_flow->vlan_tci); | |
46c88433 | 706 | if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) { |
9583bc14 EJ |
707 | return; |
708 | } | |
46c88433 | 709 | vlan = input_vid_to_vlan(in_xbundle, vid); |
9583bc14 | 710 | |
9583bc14 EJ |
711 | if (!mirrors) { |
712 | return; | |
713 | } | |
714 | ||
715 | /* Restore the original packet before adding the mirror actions. */ | |
716 | ctx->xin->flow = *orig_flow; | |
717 | ||
718 | while (mirrors) { | |
ec7ceaed EJ |
719 | mirror_mask_t dup_mirrors; |
720 | struct ofbundle *out; | |
721 | unsigned long *vlans; | |
722 | bool vlan_mirrored; | |
723 | bool has_mirror; | |
724 | int out_vlan; | |
725 | ||
46c88433 | 726 | has_mirror = mirror_get(xbridge->mbridge, mirror_mask_ffs(mirrors) - 1, |
ec7ceaed EJ |
727 | &vlans, &dup_mirrors, &out, &out_vlan); |
728 | ovs_assert(has_mirror); | |
729 | ||
730 | if (vlans) { | |
9583bc14 EJ |
731 | ctx->xout->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK); |
732 | } | |
ec7ceaed EJ |
733 | vlan_mirrored = !vlans || bitmap_is_set(vlans, vlan); |
734 | free(vlans); | |
9583bc14 | 735 | |
ec7ceaed | 736 | if (!vlan_mirrored) { |
9583bc14 EJ |
737 | mirrors = zero_rightmost_1bit(mirrors); |
738 | continue; | |
739 | } | |
740 | ||
ec7ceaed EJ |
741 | mirrors &= ~dup_mirrors; |
742 | ctx->xout->mirrors |= dup_mirrors; | |
743 | if (out) { | |
46c88433 EJ |
744 | struct xbundle *out_xbundle = xbundle_lookup(out); |
745 | if (out_xbundle) { | |
746 | output_normal(ctx, out_xbundle, vlan); | |
747 | } | |
ec7ceaed | 748 | } else if (vlan != out_vlan |
9583bc14 | 749 | && !eth_addr_is_reserved(orig_flow->dl_dst)) { |
46c88433 | 750 | struct xbundle *xbundle; |
9583bc14 | 751 | |
46c88433 EJ |
752 | LIST_FOR_EACH (xbundle, list_node, &xbridge->xbundles) { |
753 | if (xbundle_includes_vlan(xbundle, out_vlan) | |
754 | && !xbundle_mirror_out(xbridge, xbundle)) { | |
755 | output_normal(ctx, xbundle, out_vlan); | |
9583bc14 EJ |
756 | } |
757 | } | |
758 | } | |
759 | } | |
760 | } | |
761 | ||
762 | /* Given 'vid', the VID obtained from the 802.1Q header that was received as | |
46c88433 | 763 | * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle', |
9583bc14 EJ |
764 | * the bundle on which the packet was received, returns the VLAN to which the |
765 | * packet belongs. | |
766 | * | |
767 | * Both 'vid' and the return value are in the range 0...4095. */ | |
768 | static uint16_t | |
46c88433 | 769 | input_vid_to_vlan(const struct xbundle *in_xbundle, uint16_t vid) |
9583bc14 | 770 | { |
46c88433 | 771 | switch (in_xbundle->vlan_mode) { |
9583bc14 | 772 | case PORT_VLAN_ACCESS: |
46c88433 | 773 | return in_xbundle->vlan; |
9583bc14 EJ |
774 | break; |
775 | ||
776 | case PORT_VLAN_TRUNK: | |
777 | return vid; | |
778 | ||
779 | case PORT_VLAN_NATIVE_UNTAGGED: | |
780 | case PORT_VLAN_NATIVE_TAGGED: | |
46c88433 | 781 | return vid ? vid : in_xbundle->vlan; |
9583bc14 EJ |
782 | |
783 | default: | |
784 | NOT_REACHED(); | |
785 | } | |
786 | } | |
787 | ||
46c88433 | 788 | /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'. |
9583bc14 EJ |
789 | * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs |
790 | * a warning. | |
791 | * | |
792 | * 'vid' should be the VID obtained from the 802.1Q header that was received as | |
793 | * part of a packet (specify 0 if there was no 802.1Q header), in the range | |
794 | * 0...4095. */ | |
795 | static bool | |
46c88433 | 796 | input_vid_is_valid(uint16_t vid, struct xbundle *in_xbundle, bool warn) |
9583bc14 EJ |
797 | { |
798 | /* Allow any VID on the OFPP_NONE port. */ | |
46c88433 | 799 | if (in_xbundle == &ofpp_none_bundle) { |
9583bc14 EJ |
800 | return true; |
801 | } | |
802 | ||
46c88433 | 803 | switch (in_xbundle->vlan_mode) { |
9583bc14 EJ |
804 | case PORT_VLAN_ACCESS: |
805 | if (vid) { | |
806 | if (warn) { | |
807 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
46c88433 | 808 | VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" tagged " |
9583bc14 | 809 | "packet received on port %s configured as VLAN " |
46c88433 EJ |
810 | "%"PRIu16" access port", vid, in_xbundle->name, |
811 | in_xbundle->vlan); | |
9583bc14 EJ |
812 | } |
813 | return false; | |
814 | } | |
815 | return true; | |
816 | ||
817 | case PORT_VLAN_NATIVE_UNTAGGED: | |
818 | case PORT_VLAN_NATIVE_TAGGED: | |
819 | if (!vid) { | |
820 | /* Port must always carry its native VLAN. */ | |
821 | return true; | |
822 | } | |
823 | /* Fall through. */ | |
824 | case PORT_VLAN_TRUNK: | |
46c88433 | 825 | if (!xbundle_includes_vlan(in_xbundle, vid)) { |
9583bc14 EJ |
826 | if (warn) { |
827 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
46c88433 | 828 | VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" packet " |
9583bc14 | 829 | "received on port %s not configured for trunking " |
46c88433 | 830 | "VLAN %"PRIu16, vid, in_xbundle->name, vid); |
9583bc14 EJ |
831 | } |
832 | return false; | |
833 | } | |
834 | return true; | |
835 | ||
836 | default: | |
837 | NOT_REACHED(); | |
838 | } | |
839 | ||
840 | } | |
841 | ||
842 | /* Given 'vlan', the VLAN that a packet belongs to, and | |
46c88433 | 843 | * 'out_xbundle', a bundle on which the packet is to be output, returns the VID |
9583bc14 EJ |
844 | * that should be included in the 802.1Q header. (If the return value is 0, |
845 | * then the 802.1Q header should only be included in the packet if there is a | |
846 | * nonzero PCP.) | |
847 | * | |
848 | * Both 'vlan' and the return value are in the range 0...4095. */ | |
849 | static uint16_t | |
46c88433 | 850 | output_vlan_to_vid(const struct xbundle *out_xbundle, uint16_t vlan) |
9583bc14 | 851 | { |
46c88433 | 852 | switch (out_xbundle->vlan_mode) { |
9583bc14 EJ |
853 | case PORT_VLAN_ACCESS: |
854 | return 0; | |
855 | ||
856 | case PORT_VLAN_TRUNK: | |
857 | case PORT_VLAN_NATIVE_TAGGED: | |
858 | return vlan; | |
859 | ||
860 | case PORT_VLAN_NATIVE_UNTAGGED: | |
46c88433 | 861 | return vlan == out_xbundle->vlan ? 0 : vlan; |
9583bc14 EJ |
862 | |
863 | default: | |
864 | NOT_REACHED(); | |
865 | } | |
866 | } | |
867 | ||
868 | static void | |
46c88433 | 869 | output_normal(struct xlate_ctx *ctx, const struct xbundle *out_xbundle, |
9583bc14 EJ |
870 | uint16_t vlan) |
871 | { | |
33bf9176 | 872 | ovs_be16 *flow_tci = &ctx->xin->flow.vlan_tci; |
9583bc14 EJ |
873 | uint16_t vid; |
874 | ovs_be16 tci, old_tci; | |
46c88433 | 875 | struct xport *xport; |
9583bc14 | 876 | |
46c88433 EJ |
877 | vid = output_vlan_to_vid(out_xbundle, vlan); |
878 | if (list_is_empty(&out_xbundle->xports)) { | |
879 | /* Partially configured bundle with no slaves. Drop the packet. */ | |
880 | return; | |
881 | } else if (!out_xbundle->bond) { | |
882 | xport = CONTAINER_OF(list_front(&out_xbundle->xports), struct xport, | |
883 | bundle_node); | |
9583bc14 | 884 | } else { |
46c88433 EJ |
885 | struct ofport_dpif *ofport; |
886 | ||
887 | ofport = bond_choose_output_slave(out_xbundle->bond, &ctx->xin->flow, | |
4a1b8f30 | 888 | &ctx->xout->wc, vid); |
5e6af486 | 889 | xport = xport_lookup(ofport); |
46c88433 EJ |
890 | |
891 | if (!xport) { | |
9583bc14 EJ |
892 | /* No slaves enabled, so drop packet. */ |
893 | return; | |
894 | } | |
895 | } | |
896 | ||
33bf9176 | 897 | old_tci = *flow_tci; |
9583bc14 | 898 | tci = htons(vid); |
46c88433 | 899 | if (tci || out_xbundle->use_priority_tags) { |
33bf9176 | 900 | tci |= *flow_tci & htons(VLAN_PCP_MASK); |
9583bc14 EJ |
901 | if (tci) { |
902 | tci |= htons(VLAN_CFI); | |
903 | } | |
904 | } | |
33bf9176 | 905 | *flow_tci = tci; |
9583bc14 | 906 | |
46c88433 | 907 | compose_output_action(ctx, xport->ofp_port); |
33bf9176 | 908 | *flow_tci = old_tci; |
9583bc14 EJ |
909 | } |
910 | ||
911 | /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after | |
912 | * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to | |
913 | * indicate this; newer upstream kernels use gratuitous ARP requests. */ | |
914 | static bool | |
915 | is_gratuitous_arp(const struct flow *flow, struct flow_wildcards *wc) | |
916 | { | |
917 | if (flow->dl_type != htons(ETH_TYPE_ARP)) { | |
918 | return false; | |
919 | } | |
920 | ||
921 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
922 | if (!eth_addr_is_broadcast(flow->dl_dst)) { | |
923 | return false; | |
924 | } | |
925 | ||
926 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
927 | if (flow->nw_proto == ARP_OP_REPLY) { | |
928 | return true; | |
929 | } else if (flow->nw_proto == ARP_OP_REQUEST) { | |
930 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
931 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
932 | ||
933 | return flow->nw_src == flow->nw_dst; | |
934 | } else { | |
935 | return false; | |
936 | } | |
937 | } | |
938 | ||
939 | static void | |
46c88433 | 940 | update_learning_table(const struct xbridge *xbridge, |
9583bc14 | 941 | const struct flow *flow, struct flow_wildcards *wc, |
46c88433 | 942 | int vlan, struct xbundle *in_xbundle) |
9583bc14 EJ |
943 | { |
944 | struct mac_entry *mac; | |
945 | ||
946 | /* Don't learn the OFPP_NONE port. */ | |
46c88433 | 947 | if (in_xbundle == &ofpp_none_bundle) { |
9583bc14 EJ |
948 | return; |
949 | } | |
950 | ||
509c0149 | 951 | ovs_rwlock_wrlock(&xbridge->ml->rwlock); |
46c88433 | 952 | if (!mac_learning_may_learn(xbridge->ml, flow->dl_src, vlan)) { |
509c0149 | 953 | goto out; |
9583bc14 EJ |
954 | } |
955 | ||
46c88433 | 956 | mac = mac_learning_insert(xbridge->ml, flow->dl_src, vlan); |
9583bc14 EJ |
957 | if (is_gratuitous_arp(flow, wc)) { |
958 | /* We don't want to learn from gratuitous ARP packets that are | |
959 | * reflected back over bond slaves so we lock the learning table. */ | |
46c88433 | 960 | if (!in_xbundle->bond) { |
9583bc14 EJ |
961 | mac_entry_set_grat_arp_lock(mac); |
962 | } else if (mac_entry_is_grat_arp_locked(mac)) { | |
509c0149 | 963 | goto out; |
9583bc14 EJ |
964 | } |
965 | } | |
966 | ||
30618594 | 967 | if (mac->port.p != in_xbundle->ofbundle) { |
9583bc14 EJ |
968 | /* The log messages here could actually be useful in debugging, |
969 | * so keep the rate limit relatively high. */ | |
970 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300); | |
971 | VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is " | |
972 | "on port %s in VLAN %d", | |
46c88433 EJ |
973 | xbridge->name, ETH_ADDR_ARGS(flow->dl_src), |
974 | in_xbundle->name, vlan); | |
9583bc14 | 975 | |
46c88433 | 976 | mac->port.p = in_xbundle->ofbundle; |
30618594 | 977 | mac_learning_changed(xbridge->ml); |
9583bc14 | 978 | } |
509c0149 EJ |
979 | out: |
980 | ovs_rwlock_unlock(&xbridge->ml->rwlock); | |
9583bc14 EJ |
981 | } |
982 | ||
46c88433 | 983 | /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or |
9583bc14 EJ |
984 | * dropped. Returns true if they may be forwarded, false if they should be |
985 | * dropped. | |
986 | * | |
46c88433 | 987 | * 'in_port' must be the xport that corresponds to flow->in_port. |
9583bc14 EJ |
988 | * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull). |
989 | * | |
990 | * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as | |
991 | * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as | |
992 | * checked by input_vid_is_valid(). | |
993 | * | |
994 | * May also add tags to '*tags', although the current implementation only does | |
995 | * so in one special case. | |
996 | */ | |
997 | static bool | |
46c88433 | 998 | is_admissible(struct xlate_ctx *ctx, struct xport *in_port, |
9583bc14 EJ |
999 | uint16_t vlan) |
1000 | { | |
46c88433 EJ |
1001 | struct xbundle *in_xbundle = in_port->xbundle; |
1002 | const struct xbridge *xbridge = ctx->xbridge; | |
9583bc14 | 1003 | struct flow *flow = &ctx->xin->flow; |
9583bc14 EJ |
1004 | |
1005 | /* Drop frames for reserved multicast addresses | |
1006 | * only if forward_bpdu option is absent. */ | |
46c88433 | 1007 | if (!xbridge->forward_bpdu && eth_addr_is_reserved(flow->dl_dst)) { |
9583bc14 EJ |
1008 | xlate_report(ctx, "packet has reserved destination MAC, dropping"); |
1009 | return false; | |
1010 | } | |
1011 | ||
46c88433 | 1012 | if (in_xbundle->bond) { |
9583bc14 EJ |
1013 | struct mac_entry *mac; |
1014 | ||
46c88433 | 1015 | switch (bond_check_admissibility(in_xbundle->bond, in_port->ofport, |
4a1b8f30 | 1016 | flow->dl_dst)) { |
9583bc14 EJ |
1017 | case BV_ACCEPT: |
1018 | break; | |
1019 | ||
1020 | case BV_DROP: | |
1021 | xlate_report(ctx, "bonding refused admissibility, dropping"); | |
1022 | return false; | |
1023 | ||
1024 | case BV_DROP_IF_MOVED: | |
509c0149 | 1025 | ovs_rwlock_rdlock(&xbridge->ml->rwlock); |
30618594 | 1026 | mac = mac_learning_lookup(xbridge->ml, flow->dl_src, vlan); |
46c88433 | 1027 | if (mac && mac->port.p != in_xbundle->ofbundle && |
9583bc14 EJ |
1028 | (!is_gratuitous_arp(flow, &ctx->xout->wc) |
1029 | || mac_entry_is_grat_arp_locked(mac))) { | |
509c0149 | 1030 | ovs_rwlock_unlock(&xbridge->ml->rwlock); |
9583bc14 EJ |
1031 | xlate_report(ctx, "SLB bond thinks this packet looped back, " |
1032 | "dropping"); | |
1033 | return false; | |
1034 | } | |
509c0149 | 1035 | ovs_rwlock_unlock(&xbridge->ml->rwlock); |
9583bc14 EJ |
1036 | break; |
1037 | } | |
1038 | } | |
1039 | ||
1040 | return true; | |
1041 | } | |
1042 | ||
1043 | static void | |
1044 | xlate_normal(struct xlate_ctx *ctx) | |
1045 | { | |
33bf9176 BP |
1046 | struct flow_wildcards *wc = &ctx->xout->wc; |
1047 | struct flow *flow = &ctx->xin->flow; | |
46c88433 EJ |
1048 | struct xbundle *in_xbundle; |
1049 | struct xport *in_port; | |
9583bc14 EJ |
1050 | struct mac_entry *mac; |
1051 | uint16_t vlan; | |
1052 | uint16_t vid; | |
1053 | ||
1054 | ctx->xout->has_normal = true; | |
1055 | ||
33bf9176 BP |
1056 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); |
1057 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
1dd35f8a | 1058 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
9583bc14 | 1059 | |
46c88433 EJ |
1060 | in_xbundle = lookup_input_bundle(ctx->xbridge, flow->in_port.ofp_port, |
1061 | ctx->xin->packet != NULL, &in_port); | |
1062 | if (!in_xbundle) { | |
9583bc14 EJ |
1063 | xlate_report(ctx, "no input bundle, dropping"); |
1064 | return; | |
1065 | } | |
1066 | ||
1067 | /* Drop malformed frames. */ | |
33bf9176 BP |
1068 | if (flow->dl_type == htons(ETH_TYPE_VLAN) && |
1069 | !(flow->vlan_tci & htons(VLAN_CFI))) { | |
9583bc14 EJ |
1070 | if (ctx->xin->packet != NULL) { |
1071 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
1072 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet with partial " | |
1073 | "VLAN tag received on port %s", | |
46c88433 | 1074 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 EJ |
1075 | } |
1076 | xlate_report(ctx, "partial VLAN tag, dropping"); | |
1077 | return; | |
1078 | } | |
1079 | ||
1080 | /* Drop frames on bundles reserved for mirroring. */ | |
46c88433 | 1081 | if (xbundle_mirror_out(ctx->xbridge, in_xbundle)) { |
9583bc14 EJ |
1082 | if (ctx->xin->packet != NULL) { |
1083 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
1084 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port " | |
1085 | "%s, which is reserved exclusively for mirroring", | |
46c88433 | 1086 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 EJ |
1087 | } |
1088 | xlate_report(ctx, "input port is mirror output port, dropping"); | |
1089 | return; | |
1090 | } | |
1091 | ||
1092 | /* Check VLAN. */ | |
33bf9176 | 1093 | vid = vlan_tci_to_vid(flow->vlan_tci); |
46c88433 | 1094 | if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) { |
9583bc14 EJ |
1095 | xlate_report(ctx, "disallowed VLAN VID for this input port, dropping"); |
1096 | return; | |
1097 | } | |
46c88433 | 1098 | vlan = input_vid_to_vlan(in_xbundle, vid); |
9583bc14 EJ |
1099 | |
1100 | /* Check other admissibility requirements. */ | |
1101 | if (in_port && !is_admissible(ctx, in_port, vlan)) { | |
1102 | return; | |
1103 | } | |
1104 | ||
1105 | /* Learn source MAC. */ | |
1106 | if (ctx->xin->may_learn) { | |
46c88433 | 1107 | update_learning_table(ctx->xbridge, flow, wc, vlan, in_xbundle); |
9583bc14 EJ |
1108 | } |
1109 | ||
1110 | /* Determine output bundle. */ | |
509c0149 | 1111 | ovs_rwlock_rdlock(&ctx->xbridge->ml->rwlock); |
30618594 | 1112 | mac = mac_learning_lookup(ctx->xbridge->ml, flow->dl_dst, vlan); |
9583bc14 | 1113 | if (mac) { |
46c88433 EJ |
1114 | struct xbundle *mac_xbundle = xbundle_lookup(mac->port.p); |
1115 | if (mac_xbundle && mac_xbundle != in_xbundle) { | |
9583bc14 | 1116 | xlate_report(ctx, "forwarding to learned port"); |
46c88433 EJ |
1117 | output_normal(ctx, mac_xbundle, vlan); |
1118 | } else if (!mac_xbundle) { | |
1119 | xlate_report(ctx, "learned port is unknown, dropping"); | |
9583bc14 EJ |
1120 | } else { |
1121 | xlate_report(ctx, "learned port is input port, dropping"); | |
1122 | } | |
1123 | } else { | |
46c88433 | 1124 | struct xbundle *xbundle; |
9583bc14 EJ |
1125 | |
1126 | xlate_report(ctx, "no learned MAC for destination, flooding"); | |
46c88433 EJ |
1127 | LIST_FOR_EACH (xbundle, list_node, &ctx->xbridge->xbundles) { |
1128 | if (xbundle != in_xbundle | |
1129 | && xbundle_includes_vlan(xbundle, vlan) | |
1130 | && xbundle->floodable | |
1131 | && !xbundle_mirror_out(ctx->xbridge, xbundle)) { | |
1132 | output_normal(ctx, xbundle, vlan); | |
9583bc14 EJ |
1133 | } |
1134 | } | |
1135 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
1136 | } | |
509c0149 | 1137 | ovs_rwlock_unlock(&ctx->xbridge->ml->rwlock); |
9583bc14 EJ |
1138 | } |
1139 | ||
1140 | /* Compose SAMPLE action for sFlow or IPFIX. The given probability is | |
1141 | * the number of packets out of UINT32_MAX to sample. The given | |
1142 | * cookie is passed back in the callback for each sampled packet. | |
1143 | */ | |
1144 | static size_t | |
46c88433 | 1145 | compose_sample_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1146 | struct ofpbuf *odp_actions, |
1147 | const struct flow *flow, | |
1148 | const uint32_t probability, | |
1149 | const union user_action_cookie *cookie, | |
1150 | const size_t cookie_size) | |
1151 | { | |
1152 | size_t sample_offset, actions_offset; | |
89a8a7f0 | 1153 | odp_port_t odp_port; |
9583bc14 | 1154 | int cookie_offset; |
89a8a7f0 | 1155 | uint32_t pid; |
9583bc14 EJ |
1156 | |
1157 | sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE); | |
1158 | ||
1159 | nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability); | |
1160 | ||
1161 | actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS); | |
89a8a7f0 EJ |
1162 | |
1163 | odp_port = ofp_port_to_odp_port(xbridge, flow->in_port.ofp_port); | |
1164 | pid = dpif_port_get_pid(xbridge->dpif, odp_port); | |
1165 | cookie_offset = odp_put_userspace_action(pid, cookie, cookie_size, odp_actions); | |
9583bc14 EJ |
1166 | |
1167 | nl_msg_end_nested(odp_actions, actions_offset); | |
1168 | nl_msg_end_nested(odp_actions, sample_offset); | |
1169 | return cookie_offset; | |
1170 | } | |
1171 | ||
1172 | static void | |
46c88433 EJ |
1173 | compose_sflow_cookie(const struct xbridge *xbridge, ovs_be16 vlan_tci, |
1174 | odp_port_t odp_port, unsigned int n_outputs, | |
1175 | union user_action_cookie *cookie) | |
9583bc14 EJ |
1176 | { |
1177 | int ifindex; | |
1178 | ||
1179 | cookie->type = USER_ACTION_COOKIE_SFLOW; | |
1180 | cookie->sflow.vlan_tci = vlan_tci; | |
1181 | ||
1182 | /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output | |
1183 | * port information") for the interpretation of cookie->output. */ | |
1184 | switch (n_outputs) { | |
1185 | case 0: | |
1186 | /* 0x40000000 | 256 means "packet dropped for unknown reason". */ | |
1187 | cookie->sflow.output = 0x40000000 | 256; | |
1188 | break; | |
1189 | ||
1190 | case 1: | |
46c88433 | 1191 | ifindex = dpif_sflow_odp_port_to_ifindex(xbridge->sflow, odp_port); |
9583bc14 EJ |
1192 | if (ifindex) { |
1193 | cookie->sflow.output = ifindex; | |
1194 | break; | |
1195 | } | |
1196 | /* Fall through. */ | |
1197 | default: | |
1198 | /* 0x80000000 means "multiple output ports. */ | |
1199 | cookie->sflow.output = 0x80000000 | n_outputs; | |
1200 | break; | |
1201 | } | |
1202 | } | |
1203 | ||
1204 | /* Compose SAMPLE action for sFlow bridge sampling. */ | |
1205 | static size_t | |
46c88433 | 1206 | compose_sflow_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1207 | struct ofpbuf *odp_actions, |
1208 | const struct flow *flow, | |
4e022ec0 | 1209 | odp_port_t odp_port) |
9583bc14 EJ |
1210 | { |
1211 | uint32_t probability; | |
1212 | union user_action_cookie cookie; | |
1213 | ||
46c88433 | 1214 | if (!xbridge->sflow || flow->in_port.ofp_port == OFPP_NONE) { |
9583bc14 EJ |
1215 | return 0; |
1216 | } | |
1217 | ||
46c88433 EJ |
1218 | probability = dpif_sflow_get_probability(xbridge->sflow); |
1219 | compose_sflow_cookie(xbridge, htons(0), odp_port, | |
4e022ec0 | 1220 | odp_port == ODPP_NONE ? 0 : 1, &cookie); |
9583bc14 | 1221 | |
46c88433 | 1222 | return compose_sample_action(xbridge, odp_actions, flow, probability, |
9583bc14 EJ |
1223 | &cookie, sizeof cookie.sflow); |
1224 | } | |
1225 | ||
1226 | static void | |
1227 | compose_flow_sample_cookie(uint16_t probability, uint32_t collector_set_id, | |
1228 | uint32_t obs_domain_id, uint32_t obs_point_id, | |
1229 | union user_action_cookie *cookie) | |
1230 | { | |
1231 | cookie->type = USER_ACTION_COOKIE_FLOW_SAMPLE; | |
1232 | cookie->flow_sample.probability = probability; | |
1233 | cookie->flow_sample.collector_set_id = collector_set_id; | |
1234 | cookie->flow_sample.obs_domain_id = obs_domain_id; | |
1235 | cookie->flow_sample.obs_point_id = obs_point_id; | |
1236 | } | |
1237 | ||
1238 | static void | |
1239 | compose_ipfix_cookie(union user_action_cookie *cookie) | |
1240 | { | |
1241 | cookie->type = USER_ACTION_COOKIE_IPFIX; | |
1242 | } | |
1243 | ||
1244 | /* Compose SAMPLE action for IPFIX bridge sampling. */ | |
1245 | static void | |
46c88433 | 1246 | compose_ipfix_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1247 | struct ofpbuf *odp_actions, |
1248 | const struct flow *flow) | |
1249 | { | |
1250 | uint32_t probability; | |
1251 | union user_action_cookie cookie; | |
1252 | ||
46c88433 | 1253 | if (!xbridge->ipfix || flow->in_port.ofp_port == OFPP_NONE) { |
9583bc14 EJ |
1254 | return; |
1255 | } | |
1256 | ||
46c88433 | 1257 | probability = dpif_ipfix_get_bridge_exporter_probability(xbridge->ipfix); |
9583bc14 EJ |
1258 | compose_ipfix_cookie(&cookie); |
1259 | ||
46c88433 | 1260 | compose_sample_action(xbridge, odp_actions, flow, probability, |
9583bc14 EJ |
1261 | &cookie, sizeof cookie.ipfix); |
1262 | } | |
1263 | ||
1264 | /* SAMPLE action for sFlow must be first action in any given list of | |
1265 | * actions. At this point we do not have all information required to | |
1266 | * build it. So try to build sample action as complete as possible. */ | |
1267 | static void | |
1268 | add_sflow_action(struct xlate_ctx *ctx) | |
1269 | { | |
46c88433 | 1270 | ctx->user_cookie_offset = compose_sflow_action(ctx->xbridge, |
9583bc14 | 1271 | &ctx->xout->odp_actions, |
4e022ec0 | 1272 | &ctx->xin->flow, ODPP_NONE); |
9583bc14 EJ |
1273 | ctx->sflow_odp_port = 0; |
1274 | ctx->sflow_n_outputs = 0; | |
1275 | } | |
1276 | ||
1277 | /* SAMPLE action for IPFIX must be 1st or 2nd action in any given list | |
1278 | * of actions, eventually after the SAMPLE action for sFlow. */ | |
1279 | static void | |
1280 | add_ipfix_action(struct xlate_ctx *ctx) | |
1281 | { | |
46c88433 | 1282 | compose_ipfix_action(ctx->xbridge, &ctx->xout->odp_actions, |
9583bc14 EJ |
1283 | &ctx->xin->flow); |
1284 | } | |
1285 | ||
1286 | /* Fix SAMPLE action according to data collected while composing ODP actions. | |
1287 | * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested | |
1288 | * USERSPACE action's user-cookie which is required for sflow. */ | |
1289 | static void | |
1290 | fix_sflow_action(struct xlate_ctx *ctx) | |
1291 | { | |
1292 | const struct flow *base = &ctx->base_flow; | |
1293 | union user_action_cookie *cookie; | |
1294 | ||
1295 | if (!ctx->user_cookie_offset) { | |
1296 | return; | |
1297 | } | |
1298 | ||
1299 | cookie = ofpbuf_at(&ctx->xout->odp_actions, ctx->user_cookie_offset, | |
1300 | sizeof cookie->sflow); | |
1301 | ovs_assert(cookie->type == USER_ACTION_COOKIE_SFLOW); | |
1302 | ||
46c88433 | 1303 | compose_sflow_cookie(ctx->xbridge, base->vlan_tci, |
9583bc14 EJ |
1304 | ctx->sflow_odp_port, ctx->sflow_n_outputs, cookie); |
1305 | } | |
1306 | ||
db7d4e46 | 1307 | static enum slow_path_reason |
642dc74d | 1308 | process_special(struct xlate_ctx *ctx, const struct flow *flow, |
46c88433 | 1309 | const struct xport *xport, const struct ofpbuf *packet) |
db7d4e46 | 1310 | { |
642dc74d | 1311 | struct flow_wildcards *wc = &ctx->xout->wc; |
46c88433 | 1312 | const struct xbridge *xbridge = ctx->xbridge; |
642dc74d | 1313 | |
46c88433 | 1314 | if (!xport) { |
db7d4e46 | 1315 | return 0; |
46c88433 | 1316 | } else if (xport->cfm && cfm_should_process_flow(xport->cfm, flow, wc)) { |
db7d4e46 | 1317 | if (packet) { |
46c88433 | 1318 | cfm_process_heartbeat(xport->cfm, packet); |
db7d4e46 JP |
1319 | } |
1320 | return SLOW_CFM; | |
fab52e16 | 1321 | } else if (xport->bfd && bfd_should_process_flow(xport->bfd, flow, wc)) { |
db7d4e46 | 1322 | if (packet) { |
46c88433 | 1323 | bfd_process_packet(xport->bfd, flow, packet); |
db7d4e46 JP |
1324 | } |
1325 | return SLOW_BFD; | |
46c88433 | 1326 | } else if (xport->xbundle && xport->xbundle->lacp |
db7d4e46 JP |
1327 | && flow->dl_type == htons(ETH_TYPE_LACP)) { |
1328 | if (packet) { | |
46c88433 | 1329 | lacp_process_packet(xport->xbundle->lacp, xport->ofport, packet); |
db7d4e46 JP |
1330 | } |
1331 | return SLOW_LACP; | |
9d189a50 | 1332 | } else if (xbridge->stp && stp_should_process_flow(flow, wc)) { |
db7d4e46 | 1333 | if (packet) { |
9d189a50 | 1334 | stp_process_packet(xport, packet); |
db7d4e46 JP |
1335 | } |
1336 | return SLOW_STP; | |
1337 | } else { | |
1338 | return 0; | |
1339 | } | |
1340 | } | |
1341 | ||
9583bc14 | 1342 | static void |
4e022ec0 | 1343 | compose_output_action__(struct xlate_ctx *ctx, ofp_port_t ofp_port, |
9583bc14 EJ |
1344 | bool check_stp) |
1345 | { | |
46c88433 | 1346 | const struct xport *xport = get_ofp_port(ctx->xbridge, ofp_port); |
1dd35f8a | 1347 | struct flow_wildcards *wc = &ctx->xout->wc; |
33bf9176 | 1348 | struct flow *flow = &ctx->xin->flow; |
9583bc14 EJ |
1349 | ovs_be16 flow_vlan_tci; |
1350 | uint32_t flow_skb_mark; | |
1351 | uint8_t flow_nw_tos; | |
4e022ec0 | 1352 | odp_port_t out_port, odp_port; |
ca077186 | 1353 | uint8_t dscp; |
9583bc14 EJ |
1354 | |
1355 | /* If 'struct flow' gets additional metadata, we'll need to zero it out | |
1356 | * before traversing a patch port. */ | |
1357 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 20); | |
1358 | ||
46c88433 | 1359 | if (!xport) { |
9583bc14 EJ |
1360 | xlate_report(ctx, "Nonexistent output port"); |
1361 | return; | |
46c88433 | 1362 | } else if (xport->config & OFPUTIL_PC_NO_FWD) { |
9583bc14 EJ |
1363 | xlate_report(ctx, "OFPPC_NO_FWD set, skipping output"); |
1364 | return; | |
9d189a50 | 1365 | } else if (check_stp && !xport_stp_forward_state(xport)) { |
9583bc14 EJ |
1366 | xlate_report(ctx, "STP not in forwarding state, skipping output"); |
1367 | return; | |
1368 | } | |
1369 | ||
46c88433 EJ |
1370 | if (mbridge_has_mirrors(ctx->xbridge->mbridge) && xport->xbundle) { |
1371 | ctx->xout->mirrors |= xbundle_mirror_dst(xport->xbundle->xbridge, | |
1372 | xport->xbundle); | |
cdf5d3a5 EJ |
1373 | } |
1374 | ||
46c88433 EJ |
1375 | if (xport->peer) { |
1376 | const struct xport *peer = xport->peer; | |
9583bc14 | 1377 | struct flow old_flow = ctx->xin->flow; |
9583bc14 | 1378 | enum slow_path_reason special; |
9583bc14 | 1379 | |
46c88433 EJ |
1380 | ctx->xbridge = peer->xbridge; |
1381 | flow->in_port.ofp_port = peer->ofp_port; | |
33bf9176 BP |
1382 | flow->metadata = htonll(0); |
1383 | memset(&flow->tunnel, 0, sizeof flow->tunnel); | |
1384 | memset(flow->regs, 0, sizeof flow->regs); | |
9583bc14 | 1385 | |
642dc74d | 1386 | special = process_special(ctx, &ctx->xin->flow, peer, |
9583bc14 EJ |
1387 | ctx->xin->packet); |
1388 | if (special) { | |
1389 | ctx->xout->slow = special; | |
ddd3c975 | 1390 | } else if (may_receive(peer, ctx)) { |
9d189a50 | 1391 | if (xport_stp_forward_state(peer)) { |
4e022ec0 | 1392 | xlate_table_action(ctx, flow->in_port.ofp_port, 0, true); |
9583bc14 EJ |
1393 | } else { |
1394 | /* Forwarding is disabled by STP. Let OFPP_NORMAL and the | |
1395 | * learning action look at the packet, then drop it. */ | |
1396 | struct flow old_base_flow = ctx->base_flow; | |
1397 | size_t old_size = ctx->xout->odp_actions.size; | |
cdf5d3a5 | 1398 | mirror_mask_t old_mirrors = ctx->xout->mirrors; |
4e022ec0 | 1399 | xlate_table_action(ctx, flow->in_port.ofp_port, 0, true); |
cdf5d3a5 | 1400 | ctx->xout->mirrors = old_mirrors; |
9583bc14 EJ |
1401 | ctx->base_flow = old_base_flow; |
1402 | ctx->xout->odp_actions.size = old_size; | |
1403 | } | |
1404 | } | |
1405 | ||
1406 | ctx->xin->flow = old_flow; | |
46c88433 | 1407 | ctx->xbridge = xport->xbundle->xbridge; |
9583bc14 EJ |
1408 | |
1409 | if (ctx->xin->resubmit_stats) { | |
46c88433 EJ |
1410 | netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats); |
1411 | netdev_vport_inc_rx(peer->netdev, ctx->xin->resubmit_stats); | |
9583bc14 EJ |
1412 | } |
1413 | ||
1414 | return; | |
1415 | } | |
1416 | ||
33bf9176 BP |
1417 | flow_vlan_tci = flow->vlan_tci; |
1418 | flow_skb_mark = flow->skb_mark; | |
1419 | flow_nw_tos = flow->nw_tos; | |
9583bc14 | 1420 | |
55954f6e | 1421 | if (dscp_from_skb_priority(xport, flow->skb_priority, &dscp)) { |
1dd35f8a | 1422 | wc->masks.nw_tos |= IP_ECN_MASK; |
33bf9176 | 1423 | flow->nw_tos &= ~IP_DSCP_MASK; |
ca077186 | 1424 | flow->nw_tos |= dscp; |
9583bc14 EJ |
1425 | } |
1426 | ||
46c88433 | 1427 | if (xport->is_tunnel) { |
9583bc14 EJ |
1428 | /* Save tunnel metadata so that changes made due to |
1429 | * the Logical (tunnel) Port are not visible for any further | |
1430 | * matches, while explicit set actions on tunnel metadata are. | |
1431 | */ | |
33bf9176 | 1432 | struct flow_tnl flow_tnl = flow->tunnel; |
46c88433 | 1433 | odp_port = tnl_port_send(xport->ofport, flow, &ctx->xout->wc); |
4e022ec0 | 1434 | if (odp_port == ODPP_NONE) { |
9583bc14 EJ |
1435 | xlate_report(ctx, "Tunneling decided against output"); |
1436 | goto out; /* restore flow_nw_tos */ | |
1437 | } | |
33bf9176 | 1438 | if (flow->tunnel.ip_dst == ctx->orig_tunnel_ip_dst) { |
9583bc14 EJ |
1439 | xlate_report(ctx, "Not tunneling to our own address"); |
1440 | goto out; /* restore flow_nw_tos */ | |
1441 | } | |
1442 | if (ctx->xin->resubmit_stats) { | |
46c88433 | 1443 | netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats); |
9583bc14 EJ |
1444 | } |
1445 | out_port = odp_port; | |
33bf9176 | 1446 | commit_odp_tunnel_action(flow, &ctx->base_flow, |
9583bc14 | 1447 | &ctx->xout->odp_actions); |
33bf9176 | 1448 | flow->tunnel = flow_tnl; /* Restore tunnel metadata */ |
9583bc14 | 1449 | } else { |
4e022ec0 | 1450 | ofp_port_t vlandev_port; |
1dd35f8a | 1451 | |
46c88433 EJ |
1452 | odp_port = xport->odp_port; |
1453 | if (ofproto_has_vlan_splinters(ctx->xbridge->ofproto)) { | |
1dd35f8a JP |
1454 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
1455 | } | |
46c88433 | 1456 | vlandev_port = vsp_realdev_to_vlandev(ctx->xbridge->ofproto, ofp_port, |
33bf9176 | 1457 | flow->vlan_tci); |
9583bc14 EJ |
1458 | if (vlandev_port == ofp_port) { |
1459 | out_port = odp_port; | |
1460 | } else { | |
46c88433 | 1461 | out_port = ofp_port_to_odp_port(ctx->xbridge, vlandev_port); |
33bf9176 | 1462 | flow->vlan_tci = htons(0); |
9583bc14 | 1463 | } |
33bf9176 | 1464 | flow->skb_mark &= ~IPSEC_MARK; |
9583bc14 | 1465 | } |
9583bc14 | 1466 | |
4e022ec0 | 1467 | if (out_port != ODPP_NONE) { |
1dd35f8a JP |
1468 | commit_odp_actions(flow, &ctx->base_flow, |
1469 | &ctx->xout->odp_actions, &ctx->xout->wc); | |
4e022ec0 AW |
1470 | nl_msg_put_odp_port(&ctx->xout->odp_actions, OVS_ACTION_ATTR_OUTPUT, |
1471 | out_port); | |
9583bc14 | 1472 | |
6cbbf4fa EJ |
1473 | ctx->sflow_odp_port = odp_port; |
1474 | ctx->sflow_n_outputs++; | |
1475 | ctx->xout->nf_output_iface = ofp_port; | |
1476 | } | |
1477 | ||
1478 | out: | |
9583bc14 | 1479 | /* Restore flow */ |
33bf9176 BP |
1480 | flow->vlan_tci = flow_vlan_tci; |
1481 | flow->skb_mark = flow_skb_mark; | |
33bf9176 | 1482 | flow->nw_tos = flow_nw_tos; |
9583bc14 EJ |
1483 | } |
1484 | ||
1485 | static void | |
4e022ec0 | 1486 | compose_output_action(struct xlate_ctx *ctx, ofp_port_t ofp_port) |
9583bc14 EJ |
1487 | { |
1488 | compose_output_action__(ctx, ofp_port, true); | |
1489 | } | |
1490 | ||
9583bc14 EJ |
1491 | /* Common rule processing in one place to avoid duplicating code. */ |
1492 | static struct rule_dpif * | |
1493 | ctx_rule_hooks(struct xlate_ctx *ctx, struct rule_dpif *rule, | |
1494 | bool may_packet_in) | |
1495 | { | |
1496 | if (ctx->xin->resubmit_hook) { | |
4d0acc70 | 1497 | ctx->xin->resubmit_hook(ctx->xin, rule, ctx->recurse); |
9583bc14 EJ |
1498 | } |
1499 | if (rule == NULL && may_packet_in) { | |
1500 | /* XXX | |
1501 | * check if table configuration flags | |
1502 | * OFPTC_TABLE_MISS_CONTROLLER, default. | |
1503 | * OFPTC_TABLE_MISS_CONTINUE, | |
1504 | * OFPTC_TABLE_MISS_DROP | |
1505 | * When OF1.0, OFPTC_TABLE_MISS_CONTINUE is used. What to do? | |
1506 | */ | |
46c88433 | 1507 | rule = rule_dpif_miss_rule(ctx->xbridge->ofproto, &ctx->xin->flow); |
9583bc14 EJ |
1508 | } |
1509 | if (rule && ctx->xin->resubmit_stats) { | |
1510 | rule_credit_stats(rule, ctx->xin->resubmit_stats); | |
1511 | } | |
1512 | return rule; | |
1513 | } | |
1514 | ||
1515 | static void | |
1516 | xlate_table_action(struct xlate_ctx *ctx, | |
4e022ec0 | 1517 | ofp_port_t in_port, uint8_t table_id, bool may_packet_in) |
9583bc14 EJ |
1518 | { |
1519 | if (ctx->recurse < MAX_RESUBMIT_RECURSION) { | |
1520 | struct rule_dpif *rule; | |
4e022ec0 | 1521 | ofp_port_t old_in_port = ctx->xin->flow.in_port.ofp_port; |
9583bc14 EJ |
1522 | uint8_t old_table_id = ctx->table_id; |
1523 | ||
1524 | ctx->table_id = table_id; | |
1525 | ||
1526 | /* Look up a flow with 'in_port' as the input port. */ | |
4e022ec0 | 1527 | ctx->xin->flow.in_port.ofp_port = in_port; |
46c88433 EJ |
1528 | rule = rule_dpif_lookup_in_table(ctx->xbridge->ofproto, |
1529 | &ctx->xin->flow, &ctx->xout->wc, | |
1530 | table_id); | |
9583bc14 | 1531 | |
9583bc14 EJ |
1532 | /* Restore the original input port. Otherwise OFPP_NORMAL and |
1533 | * OFPP_IN_PORT will have surprising behavior. */ | |
4e022ec0 | 1534 | ctx->xin->flow.in_port.ofp_port = old_in_port; |
9583bc14 EJ |
1535 | |
1536 | rule = ctx_rule_hooks(ctx, rule, may_packet_in); | |
1537 | ||
1538 | if (rule) { | |
1539 | struct rule_dpif *old_rule = ctx->rule; | |
1540 | ||
1541 | ctx->recurse++; | |
1542 | ctx->rule = rule; | |
1543 | do_xlate_actions(rule->up.ofpacts, rule->up.ofpacts_len, ctx); | |
1544 | ctx->rule = old_rule; | |
1545 | ctx->recurse--; | |
1546 | } | |
1547 | ||
1548 | ctx->table_id = old_table_id; | |
1549 | } else { | |
1550 | static struct vlog_rate_limit recurse_rl = VLOG_RATE_LIMIT_INIT(1, 1); | |
1551 | ||
1552 | VLOG_ERR_RL(&recurse_rl, "resubmit actions recursed over %d times", | |
1553 | MAX_RESUBMIT_RECURSION); | |
9583bc14 EJ |
1554 | } |
1555 | } | |
1556 | ||
1557 | static void | |
1558 | xlate_ofpact_resubmit(struct xlate_ctx *ctx, | |
1559 | const struct ofpact_resubmit *resubmit) | |
1560 | { | |
4e022ec0 | 1561 | ofp_port_t in_port; |
9583bc14 EJ |
1562 | uint8_t table_id; |
1563 | ||
1564 | in_port = resubmit->in_port; | |
1565 | if (in_port == OFPP_IN_PORT) { | |
4e022ec0 | 1566 | in_port = ctx->xin->flow.in_port.ofp_port; |
9583bc14 EJ |
1567 | } |
1568 | ||
1569 | table_id = resubmit->table_id; | |
1570 | if (table_id == 255) { | |
1571 | table_id = ctx->table_id; | |
1572 | } | |
1573 | ||
1574 | xlate_table_action(ctx, in_port, table_id, false); | |
1575 | } | |
1576 | ||
1577 | static void | |
1578 | flood_packets(struct xlate_ctx *ctx, bool all) | |
1579 | { | |
46c88433 | 1580 | const struct xport *xport; |
9583bc14 | 1581 | |
46c88433 EJ |
1582 | HMAP_FOR_EACH (xport, ofp_node, &ctx->xbridge->xports) { |
1583 | if (xport->ofp_port == ctx->xin->flow.in_port.ofp_port) { | |
9583bc14 EJ |
1584 | continue; |
1585 | } | |
1586 | ||
1587 | if (all) { | |
46c88433 EJ |
1588 | compose_output_action__(ctx, xport->ofp_port, false); |
1589 | } else if (!(xport->config & OFPUTIL_PC_NO_FLOOD)) { | |
1590 | compose_output_action(ctx, xport->ofp_port); | |
9583bc14 EJ |
1591 | } |
1592 | } | |
1593 | ||
1594 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
1595 | } | |
1596 | ||
1597 | static void | |
1598 | execute_controller_action(struct xlate_ctx *ctx, int len, | |
1599 | enum ofp_packet_in_reason reason, | |
1600 | uint16_t controller_id) | |
1601 | { | |
1602 | struct ofputil_packet_in pin; | |
1603 | struct ofpbuf *packet; | |
1604 | struct flow key; | |
1605 | ||
1606 | ovs_assert(!ctx->xout->slow || ctx->xout->slow == SLOW_CONTROLLER); | |
1607 | ctx->xout->slow = SLOW_CONTROLLER; | |
1608 | if (!ctx->xin->packet) { | |
1609 | return; | |
1610 | } | |
1611 | ||
1612 | packet = ofpbuf_clone(ctx->xin->packet); | |
1613 | ||
1614 | key.skb_priority = 0; | |
1615 | key.skb_mark = 0; | |
1616 | memset(&key.tunnel, 0, sizeof key.tunnel); | |
1617 | ||
1618 | commit_odp_actions(&ctx->xin->flow, &ctx->base_flow, | |
1dd35f8a | 1619 | &ctx->xout->odp_actions, &ctx->xout->wc); |
9583bc14 EJ |
1620 | |
1621 | odp_execute_actions(NULL, packet, &key, ctx->xout->odp_actions.data, | |
1622 | ctx->xout->odp_actions.size, NULL, NULL); | |
1623 | ||
1624 | pin.packet = packet->data; | |
1625 | pin.packet_len = packet->size; | |
1626 | pin.reason = reason; | |
1627 | pin.controller_id = controller_id; | |
1628 | pin.table_id = ctx->table_id; | |
1629 | pin.cookie = ctx->rule ? ctx->rule->up.flow_cookie : 0; | |
1630 | ||
1631 | pin.send_len = len; | |
1632 | flow_get_metadata(&ctx->xin->flow, &pin.fmd); | |
1633 | ||
46c88433 | 1634 | ofproto_dpif_send_packet_in(ctx->xbridge->ofproto, &pin); |
9583bc14 EJ |
1635 | ofpbuf_delete(packet); |
1636 | } | |
1637 | ||
1638 | static void | |
9cfef3d0 | 1639 | compose_mpls_push_action(struct xlate_ctx *ctx, ovs_be16 eth_type) |
9583bc14 | 1640 | { |
33bf9176 BP |
1641 | struct flow_wildcards *wc = &ctx->xout->wc; |
1642 | struct flow *flow = &ctx->xin->flow; | |
1643 | ||
9583bc14 EJ |
1644 | ovs_assert(eth_type_mpls(eth_type)); |
1645 | ||
33bf9176 BP |
1646 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
1647 | memset(&wc->masks.mpls_depth, 0xff, sizeof wc->masks.mpls_depth); | |
9583bc14 | 1648 | |
33bf9176 BP |
1649 | if (flow->mpls_depth) { |
1650 | flow->mpls_lse &= ~htonl(MPLS_BOS_MASK); | |
1651 | flow->mpls_depth++; | |
9583bc14 EJ |
1652 | } else { |
1653 | ovs_be32 label; | |
1654 | uint8_t tc, ttl; | |
1655 | ||
33bf9176 | 1656 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
9583bc14 EJ |
1657 | label = htonl(0x2); /* IPV6 Explicit Null. */ |
1658 | } else { | |
1659 | label = htonl(0x0); /* IPV4 Explicit Null. */ | |
1660 | } | |
1dd35f8a JP |
1661 | wc->masks.nw_tos |= IP_DSCP_MASK; |
1662 | wc->masks.nw_ttl = 0xff; | |
33bf9176 BP |
1663 | tc = (flow->nw_tos & IP_DSCP_MASK) >> 2; |
1664 | ttl = flow->nw_ttl ? flow->nw_ttl : 0x40; | |
1665 | flow->mpls_lse = set_mpls_lse_values(ttl, tc, 1, label); | |
1666 | flow->mpls_depth = 1; | |
9583bc14 | 1667 | } |
33bf9176 | 1668 | flow->dl_type = eth_type; |
9583bc14 EJ |
1669 | } |
1670 | ||
1671 | static void | |
9cfef3d0 | 1672 | compose_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type) |
9583bc14 | 1673 | { |
33bf9176 BP |
1674 | struct flow_wildcards *wc = &ctx->xout->wc; |
1675 | struct flow *flow = &ctx->xin->flow; | |
1676 | ||
9583bc14 EJ |
1677 | ovs_assert(eth_type_mpls(ctx->xin->flow.dl_type)); |
1678 | ovs_assert(!eth_type_mpls(eth_type)); | |
1679 | ||
33bf9176 BP |
1680 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
1681 | memset(&wc->masks.mpls_depth, 0xff, sizeof wc->masks.mpls_depth); | |
1682 | ||
1683 | if (flow->mpls_depth) { | |
1684 | flow->mpls_depth--; | |
1685 | flow->mpls_lse = htonl(0); | |
1686 | if (!flow->mpls_depth) { | |
1687 | flow->dl_type = eth_type; | |
9583bc14 EJ |
1688 | } |
1689 | } | |
1690 | } | |
1691 | ||
1692 | static bool | |
1693 | compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids) | |
1694 | { | |
33bf9176 BP |
1695 | struct flow *flow = &ctx->xin->flow; |
1696 | ||
1697 | if (!is_ip_any(flow)) { | |
9583bc14 EJ |
1698 | return false; |
1699 | } | |
1700 | ||
1dd35f8a | 1701 | ctx->xout->wc.masks.nw_ttl = 0xff; |
33bf9176 BP |
1702 | if (flow->nw_ttl > 1) { |
1703 | flow->nw_ttl--; | |
9583bc14 EJ |
1704 | return false; |
1705 | } else { | |
1706 | size_t i; | |
1707 | ||
1708 | for (i = 0; i < ids->n_controllers; i++) { | |
1709 | execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, | |
1710 | ids->cnt_ids[i]); | |
1711 | } | |
1712 | ||
1713 | /* Stop processing for current table. */ | |
1714 | return true; | |
1715 | } | |
1716 | } | |
1717 | ||
1718 | static bool | |
9cfef3d0 | 1719 | compose_set_mpls_ttl_action(struct xlate_ctx *ctx, uint8_t ttl) |
9583bc14 EJ |
1720 | { |
1721 | if (!eth_type_mpls(ctx->xin->flow.dl_type)) { | |
1722 | return true; | |
1723 | } | |
1724 | ||
f74e7df7 | 1725 | ctx->xout->wc.masks.mpls_lse |= htonl(MPLS_TTL_MASK); |
9583bc14 EJ |
1726 | set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse, ttl); |
1727 | return false; | |
1728 | } | |
1729 | ||
1730 | static bool | |
9cfef3d0 | 1731 | compose_dec_mpls_ttl_action(struct xlate_ctx *ctx) |
9583bc14 | 1732 | { |
33bf9176 BP |
1733 | struct flow *flow = &ctx->xin->flow; |
1734 | uint8_t ttl = mpls_lse_to_ttl(flow->mpls_lse); | |
1dd35f8a JP |
1735 | struct flow_wildcards *wc = &ctx->xout->wc; |
1736 | ||
1dd35f8a | 1737 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
9583bc14 | 1738 | |
33bf9176 | 1739 | if (!eth_type_mpls(flow->dl_type)) { |
9583bc14 EJ |
1740 | return false; |
1741 | } | |
1742 | ||
1743 | if (ttl > 1) { | |
1744 | ttl--; | |
33bf9176 | 1745 | set_mpls_lse_ttl(&flow->mpls_lse, ttl); |
9583bc14 EJ |
1746 | return false; |
1747 | } else { | |
1748 | execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, 0); | |
1749 | ||
1750 | /* Stop processing for current table. */ | |
1751 | return true; | |
1752 | } | |
1753 | } | |
1754 | ||
1755 | static void | |
1756 | xlate_output_action(struct xlate_ctx *ctx, | |
4e022ec0 | 1757 | ofp_port_t port, uint16_t max_len, bool may_packet_in) |
9583bc14 | 1758 | { |
4e022ec0 | 1759 | ofp_port_t prev_nf_output_iface = ctx->xout->nf_output_iface; |
9583bc14 EJ |
1760 | |
1761 | ctx->xout->nf_output_iface = NF_OUT_DROP; | |
1762 | ||
1763 | switch (port) { | |
1764 | case OFPP_IN_PORT: | |
4e022ec0 | 1765 | compose_output_action(ctx, ctx->xin->flow.in_port.ofp_port); |
9583bc14 EJ |
1766 | break; |
1767 | case OFPP_TABLE: | |
4e022ec0 AW |
1768 | xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port, |
1769 | 0, may_packet_in); | |
9583bc14 EJ |
1770 | break; |
1771 | case OFPP_NORMAL: | |
1772 | xlate_normal(ctx); | |
1773 | break; | |
1774 | case OFPP_FLOOD: | |
1775 | flood_packets(ctx, false); | |
1776 | break; | |
1777 | case OFPP_ALL: | |
1778 | flood_packets(ctx, true); | |
1779 | break; | |
1780 | case OFPP_CONTROLLER: | |
1781 | execute_controller_action(ctx, max_len, OFPR_ACTION, 0); | |
1782 | break; | |
1783 | case OFPP_NONE: | |
1784 | break; | |
1785 | case OFPP_LOCAL: | |
1786 | default: | |
4e022ec0 | 1787 | if (port != ctx->xin->flow.in_port.ofp_port) { |
9583bc14 EJ |
1788 | compose_output_action(ctx, port); |
1789 | } else { | |
1790 | xlate_report(ctx, "skipping output to input port"); | |
1791 | } | |
1792 | break; | |
1793 | } | |
1794 | ||
1795 | if (prev_nf_output_iface == NF_OUT_FLOOD) { | |
1796 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
1797 | } else if (ctx->xout->nf_output_iface == NF_OUT_DROP) { | |
1798 | ctx->xout->nf_output_iface = prev_nf_output_iface; | |
1799 | } else if (prev_nf_output_iface != NF_OUT_DROP && | |
1800 | ctx->xout->nf_output_iface != NF_OUT_FLOOD) { | |
1801 | ctx->xout->nf_output_iface = NF_OUT_MULTI; | |
1802 | } | |
1803 | } | |
1804 | ||
1805 | static void | |
1806 | xlate_output_reg_action(struct xlate_ctx *ctx, | |
1807 | const struct ofpact_output_reg *or) | |
1808 | { | |
1809 | uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow); | |
1810 | if (port <= UINT16_MAX) { | |
1811 | union mf_subvalue value; | |
1812 | ||
1813 | memset(&value, 0xff, sizeof value); | |
1814 | mf_write_subfield_flow(&or->src, &value, &ctx->xout->wc.masks); | |
4e022ec0 AW |
1815 | xlate_output_action(ctx, u16_to_ofp(port), |
1816 | or->max_len, false); | |
9583bc14 EJ |
1817 | } |
1818 | } | |
1819 | ||
1820 | static void | |
1821 | xlate_enqueue_action(struct xlate_ctx *ctx, | |
1822 | const struct ofpact_enqueue *enqueue) | |
1823 | { | |
4e022ec0 | 1824 | ofp_port_t ofp_port = enqueue->port; |
9583bc14 EJ |
1825 | uint32_t queue_id = enqueue->queue; |
1826 | uint32_t flow_priority, priority; | |
1827 | int error; | |
1828 | ||
1829 | /* Translate queue to priority. */ | |
89a8a7f0 | 1830 | error = dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &priority); |
9583bc14 EJ |
1831 | if (error) { |
1832 | /* Fall back to ordinary output action. */ | |
1833 | xlate_output_action(ctx, enqueue->port, 0, false); | |
1834 | return; | |
1835 | } | |
1836 | ||
1837 | /* Check output port. */ | |
1838 | if (ofp_port == OFPP_IN_PORT) { | |
4e022ec0 AW |
1839 | ofp_port = ctx->xin->flow.in_port.ofp_port; |
1840 | } else if (ofp_port == ctx->xin->flow.in_port.ofp_port) { | |
9583bc14 EJ |
1841 | return; |
1842 | } | |
1843 | ||
1844 | /* Add datapath actions. */ | |
1845 | flow_priority = ctx->xin->flow.skb_priority; | |
1846 | ctx->xin->flow.skb_priority = priority; | |
1847 | compose_output_action(ctx, ofp_port); | |
1848 | ctx->xin->flow.skb_priority = flow_priority; | |
1849 | ||
1850 | /* Update NetFlow output port. */ | |
1851 | if (ctx->xout->nf_output_iface == NF_OUT_DROP) { | |
1852 | ctx->xout->nf_output_iface = ofp_port; | |
1853 | } else if (ctx->xout->nf_output_iface != NF_OUT_FLOOD) { | |
1854 | ctx->xout->nf_output_iface = NF_OUT_MULTI; | |
1855 | } | |
1856 | } | |
1857 | ||
1858 | static void | |
1859 | xlate_set_queue_action(struct xlate_ctx *ctx, uint32_t queue_id) | |
1860 | { | |
1861 | uint32_t skb_priority; | |
1862 | ||
89a8a7f0 | 1863 | if (!dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &skb_priority)) { |
9583bc14 EJ |
1864 | ctx->xin->flow.skb_priority = skb_priority; |
1865 | } else { | |
1866 | /* Couldn't translate queue to a priority. Nothing to do. A warning | |
1867 | * has already been logged. */ | |
1868 | } | |
1869 | } | |
1870 | ||
1871 | static bool | |
46c88433 | 1872 | slave_enabled_cb(ofp_port_t ofp_port, void *xbridge_) |
9583bc14 | 1873 | { |
46c88433 EJ |
1874 | const struct xbridge *xbridge = xbridge_; |
1875 | struct xport *port; | |
9583bc14 EJ |
1876 | |
1877 | switch (ofp_port) { | |
1878 | case OFPP_IN_PORT: | |
1879 | case OFPP_TABLE: | |
1880 | case OFPP_NORMAL: | |
1881 | case OFPP_FLOOD: | |
1882 | case OFPP_ALL: | |
1883 | case OFPP_NONE: | |
1884 | return true; | |
1885 | case OFPP_CONTROLLER: /* Not supported by the bundle action. */ | |
1886 | return false; | |
1887 | default: | |
46c88433 | 1888 | port = get_ofp_port(xbridge, ofp_port); |
9583bc14 EJ |
1889 | return port ? port->may_enable : false; |
1890 | } | |
1891 | } | |
1892 | ||
1893 | static void | |
1894 | xlate_bundle_action(struct xlate_ctx *ctx, | |
1895 | const struct ofpact_bundle *bundle) | |
1896 | { | |
4e022ec0 | 1897 | ofp_port_t port; |
9583bc14 EJ |
1898 | |
1899 | port = bundle_execute(bundle, &ctx->xin->flow, &ctx->xout->wc, | |
46c88433 EJ |
1900 | slave_enabled_cb, |
1901 | CONST_CAST(struct xbridge *, ctx->xbridge)); | |
9583bc14 | 1902 | if (bundle->dst.field) { |
f74e7df7 JP |
1903 | nxm_reg_load(&bundle->dst, ofp_to_u16(port), &ctx->xin->flow, |
1904 | &ctx->xout->wc); | |
9583bc14 EJ |
1905 | } else { |
1906 | xlate_output_action(ctx, port, 0, false); | |
1907 | } | |
1908 | } | |
1909 | ||
1910 | static void | |
1911 | xlate_learn_action(struct xlate_ctx *ctx, | |
1912 | const struct ofpact_learn *learn) | |
1913 | { | |
3d9c5e58 | 1914 | struct ofputil_flow_mod *fm; |
9583bc14 | 1915 | struct ofpbuf ofpacts; |
9583bc14 EJ |
1916 | |
1917 | ctx->xout->has_learn = true; | |
1918 | ||
1919 | learn_mask(learn, &ctx->xout->wc); | |
1920 | ||
1921 | if (!ctx->xin->may_learn) { | |
1922 | return; | |
1923 | } | |
1924 | ||
3d9c5e58 EJ |
1925 | fm = xmalloc(sizeof *fm); |
1926 | ofpbuf_init(&ofpacts, 0); | |
1927 | learn_execute(learn, &ctx->xin->flow, fm, &ofpacts); | |
9583bc14 | 1928 | |
3d9c5e58 | 1929 | ofproto_dpif_flow_mod(ctx->xbridge->ofproto, fm); |
9583bc14 EJ |
1930 | } |
1931 | ||
1932 | /* Reduces '*timeout' to no more than 'max'. A value of zero in either case | |
1933 | * means "infinite". */ | |
1934 | static void | |
1935 | reduce_timeout(uint16_t max, uint16_t *timeout) | |
1936 | { | |
1937 | if (max && (!*timeout || *timeout > max)) { | |
1938 | *timeout = max; | |
1939 | } | |
1940 | } | |
1941 | ||
1942 | static void | |
1943 | xlate_fin_timeout(struct xlate_ctx *ctx, | |
1944 | const struct ofpact_fin_timeout *oft) | |
1945 | { | |
1946 | if (ctx->xin->tcp_flags & (TCP_FIN | TCP_RST) && ctx->rule) { | |
1947 | struct rule_dpif *rule = ctx->rule; | |
1948 | ||
2a5183ac JP |
1949 | if (list_is_empty(&rule->up.expirable)) { |
1950 | list_insert(&rule->up.ofproto->expirable, &rule->up.expirable); | |
1951 | } | |
1952 | ||
9583bc14 EJ |
1953 | reduce_timeout(oft->fin_idle_timeout, &rule->up.idle_timeout); |
1954 | reduce_timeout(oft->fin_hard_timeout, &rule->up.hard_timeout); | |
1955 | } | |
1956 | } | |
1957 | ||
1958 | static void | |
1959 | xlate_sample_action(struct xlate_ctx *ctx, | |
1960 | const struct ofpact_sample *os) | |
1961 | { | |
1962 | union user_action_cookie cookie; | |
1963 | /* Scale the probability from 16-bit to 32-bit while representing | |
1964 | * the same percentage. */ | |
1965 | uint32_t probability = (os->probability << 16) | os->probability; | |
1966 | ||
1967 | commit_odp_actions(&ctx->xin->flow, &ctx->base_flow, | |
1dd35f8a | 1968 | &ctx->xout->odp_actions, &ctx->xout->wc); |
9583bc14 EJ |
1969 | |
1970 | compose_flow_sample_cookie(os->probability, os->collector_set_id, | |
1971 | os->obs_domain_id, os->obs_point_id, &cookie); | |
46c88433 | 1972 | compose_sample_action(ctx->xbridge, &ctx->xout->odp_actions, &ctx->xin->flow, |
9583bc14 EJ |
1973 | probability, &cookie, sizeof cookie.flow_sample); |
1974 | } | |
1975 | ||
1976 | static bool | |
46c88433 | 1977 | may_receive(const struct xport *xport, struct xlate_ctx *ctx) |
9583bc14 | 1978 | { |
46c88433 EJ |
1979 | if (xport->config & (eth_addr_equals(ctx->xin->flow.dl_dst, eth_addr_stp) |
1980 | ? OFPUTIL_PC_NO_RECV_STP | |
1981 | : OFPUTIL_PC_NO_RECV)) { | |
9583bc14 EJ |
1982 | return false; |
1983 | } | |
1984 | ||
1985 | /* Only drop packets here if both forwarding and learning are | |
1986 | * disabled. If just learning is enabled, we need to have | |
1987 | * OFPP_NORMAL and the learning action have a look at the packet | |
1988 | * before we can drop it. */ | |
9d189a50 | 1989 | if (!xport_stp_forward_state(xport) && !xport_stp_learn_state(xport)) { |
9583bc14 EJ |
1990 | return false; |
1991 | } | |
1992 | ||
1993 | return true; | |
1994 | } | |
1995 | ||
1996 | static bool | |
1997 | tunnel_ecn_ok(struct xlate_ctx *ctx) | |
1998 | { | |
1999 | if (is_ip_any(&ctx->base_flow) | |
2000 | && (ctx->xin->flow.tunnel.ip_tos & IP_ECN_MASK) == IP_ECN_CE) { | |
2001 | if ((ctx->base_flow.nw_tos & IP_ECN_MASK) == IP_ECN_NOT_ECT) { | |
2002 | VLOG_WARN_RL(&rl, "dropping tunnel packet marked ECN CE" | |
2003 | " but is not ECN capable"); | |
2004 | return false; | |
2005 | } else { | |
2006 | /* Set the ECN CE value in the tunneled packet. */ | |
2007 | ctx->xin->flow.nw_tos |= IP_ECN_CE; | |
2008 | } | |
2009 | } | |
2010 | ||
2011 | return true; | |
2012 | } | |
2013 | ||
2014 | static void | |
2015 | do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len, | |
2016 | struct xlate_ctx *ctx) | |
2017 | { | |
33bf9176 BP |
2018 | struct flow_wildcards *wc = &ctx->xout->wc; |
2019 | struct flow *flow = &ctx->xin->flow; | |
9583bc14 EJ |
2020 | bool was_evictable = true; |
2021 | const struct ofpact *a; | |
2022 | ||
2023 | if (ctx->rule) { | |
2024 | /* Don't let the rule we're working on get evicted underneath us. */ | |
2025 | was_evictable = ctx->rule->up.evictable; | |
2026 | ctx->rule->up.evictable = false; | |
2027 | } | |
2028 | ||
9583bc14 EJ |
2029 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { |
2030 | struct ofpact_controller *controller; | |
2031 | const struct ofpact_metadata *metadata; | |
2032 | ||
2033 | if (ctx->exit) { | |
2034 | break; | |
2035 | } | |
2036 | ||
2037 | switch (a->type) { | |
2038 | case OFPACT_OUTPUT: | |
2039 | xlate_output_action(ctx, ofpact_get_OUTPUT(a)->port, | |
2040 | ofpact_get_OUTPUT(a)->max_len, true); | |
2041 | break; | |
2042 | ||
2043 | case OFPACT_CONTROLLER: | |
2044 | controller = ofpact_get_CONTROLLER(a); | |
2045 | execute_controller_action(ctx, controller->max_len, | |
2046 | controller->reason, | |
2047 | controller->controller_id); | |
2048 | break; | |
2049 | ||
2050 | case OFPACT_ENQUEUE: | |
2051 | xlate_enqueue_action(ctx, ofpact_get_ENQUEUE(a)); | |
2052 | break; | |
2053 | ||
2054 | case OFPACT_SET_VLAN_VID: | |
f74e7df7 | 2055 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
33bf9176 BP |
2056 | flow->vlan_tci &= ~htons(VLAN_VID_MASK); |
2057 | flow->vlan_tci |= (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid) | |
2058 | | htons(VLAN_CFI)); | |
9583bc14 EJ |
2059 | break; |
2060 | ||
2061 | case OFPACT_SET_VLAN_PCP: | |
f74e7df7 | 2062 | wc->masks.vlan_tci |= htons(VLAN_PCP_MASK | VLAN_CFI); |
33bf9176 BP |
2063 | flow->vlan_tci &= ~htons(VLAN_PCP_MASK); |
2064 | flow->vlan_tci |= | |
9583bc14 EJ |
2065 | htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp << VLAN_PCP_SHIFT) |
2066 | | VLAN_CFI); | |
2067 | break; | |
2068 | ||
2069 | case OFPACT_STRIP_VLAN: | |
f74e7df7 | 2070 | memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci); |
33bf9176 | 2071 | flow->vlan_tci = htons(0); |
9583bc14 EJ |
2072 | break; |
2073 | ||
2074 | case OFPACT_PUSH_VLAN: | |
2075 | /* XXX 802.1AD(QinQ) */ | |
f74e7df7 | 2076 | memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci); |
33bf9176 | 2077 | flow->vlan_tci = htons(VLAN_CFI); |
9583bc14 EJ |
2078 | break; |
2079 | ||
2080 | case OFPACT_SET_ETH_SRC: | |
f74e7df7 | 2081 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); |
33bf9176 | 2082 | memcpy(flow->dl_src, ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN); |
9583bc14 EJ |
2083 | break; |
2084 | ||
2085 | case OFPACT_SET_ETH_DST: | |
f74e7df7 | 2086 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); |
33bf9176 | 2087 | memcpy(flow->dl_dst, ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN); |
9583bc14 EJ |
2088 | break; |
2089 | ||
2090 | case OFPACT_SET_IPV4_SRC: | |
f74e7df7 | 2091 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); |
33bf9176 BP |
2092 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
2093 | flow->nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4; | |
9583bc14 EJ |
2094 | } |
2095 | break; | |
2096 | ||
2097 | case OFPACT_SET_IPV4_DST: | |
f74e7df7 | 2098 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); |
33bf9176 BP |
2099 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
2100 | flow->nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4; | |
9583bc14 EJ |
2101 | } |
2102 | break; | |
2103 | ||
2104 | case OFPACT_SET_IPV4_DSCP: | |
f74e7df7 | 2105 | wc->masks.nw_tos |= IP_DSCP_MASK; |
9583bc14 | 2106 | /* OpenFlow 1.0 only supports IPv4. */ |
33bf9176 BP |
2107 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
2108 | flow->nw_tos &= ~IP_DSCP_MASK; | |
2109 | flow->nw_tos |= ofpact_get_SET_IPV4_DSCP(a)->dscp; | |
9583bc14 EJ |
2110 | } |
2111 | break; | |
2112 | ||
2113 | case OFPACT_SET_L4_SRC_PORT: | |
33bf9176 | 2114 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
f74e7df7 | 2115 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); |
33bf9176 BP |
2116 | if (is_ip_any(flow)) { |
2117 | flow->tp_src = htons(ofpact_get_SET_L4_SRC_PORT(a)->port); | |
9583bc14 EJ |
2118 | } |
2119 | break; | |
2120 | ||
2121 | case OFPACT_SET_L4_DST_PORT: | |
33bf9176 | 2122 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
f74e7df7 | 2123 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); |
33bf9176 BP |
2124 | if (is_ip_any(flow)) { |
2125 | flow->tp_dst = htons(ofpact_get_SET_L4_DST_PORT(a)->port); | |
9583bc14 EJ |
2126 | } |
2127 | break; | |
2128 | ||
2129 | case OFPACT_RESUBMIT: | |
2130 | xlate_ofpact_resubmit(ctx, ofpact_get_RESUBMIT(a)); | |
2131 | break; | |
2132 | ||
2133 | case OFPACT_SET_TUNNEL: | |
33bf9176 | 2134 | flow->tunnel.tun_id = htonll(ofpact_get_SET_TUNNEL(a)->tun_id); |
9583bc14 EJ |
2135 | break; |
2136 | ||
2137 | case OFPACT_SET_QUEUE: | |
2138 | xlate_set_queue_action(ctx, ofpact_get_SET_QUEUE(a)->queue_id); | |
2139 | break; | |
2140 | ||
2141 | case OFPACT_POP_QUEUE: | |
33bf9176 | 2142 | flow->skb_priority = ctx->orig_skb_priority; |
9583bc14 EJ |
2143 | break; |
2144 | ||
2145 | case OFPACT_REG_MOVE: | |
33bf9176 | 2146 | nxm_execute_reg_move(ofpact_get_REG_MOVE(a), flow, wc); |
9583bc14 EJ |
2147 | break; |
2148 | ||
2149 | case OFPACT_REG_LOAD: | |
33bf9176 | 2150 | nxm_execute_reg_load(ofpact_get_REG_LOAD(a), flow); |
9583bc14 EJ |
2151 | break; |
2152 | ||
2153 | case OFPACT_STACK_PUSH: | |
33bf9176 BP |
2154 | nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), flow, wc, |
2155 | &ctx->stack); | |
9583bc14 EJ |
2156 | break; |
2157 | ||
2158 | case OFPACT_STACK_POP: | |
f74e7df7 JP |
2159 | nxm_execute_stack_pop(ofpact_get_STACK_POP(a), flow, wc, |
2160 | &ctx->stack); | |
9583bc14 EJ |
2161 | break; |
2162 | ||
2163 | case OFPACT_PUSH_MPLS: | |
9cfef3d0 | 2164 | compose_mpls_push_action(ctx, ofpact_get_PUSH_MPLS(a)->ethertype); |
9583bc14 EJ |
2165 | break; |
2166 | ||
2167 | case OFPACT_POP_MPLS: | |
9cfef3d0 | 2168 | compose_mpls_pop_action(ctx, ofpact_get_POP_MPLS(a)->ethertype); |
9583bc14 EJ |
2169 | break; |
2170 | ||
2171 | case OFPACT_SET_MPLS_TTL: | |
9cfef3d0 | 2172 | if (compose_set_mpls_ttl_action(ctx, |
9583bc14 EJ |
2173 | ofpact_get_SET_MPLS_TTL(a)->ttl)) { |
2174 | goto out; | |
2175 | } | |
2176 | break; | |
2177 | ||
2178 | case OFPACT_DEC_MPLS_TTL: | |
9cfef3d0 | 2179 | if (compose_dec_mpls_ttl_action(ctx)) { |
9583bc14 EJ |
2180 | goto out; |
2181 | } | |
2182 | break; | |
2183 | ||
2184 | case OFPACT_DEC_TTL: | |
f74e7df7 | 2185 | wc->masks.nw_ttl = 0xff; |
9583bc14 EJ |
2186 | if (compose_dec_ttl(ctx, ofpact_get_DEC_TTL(a))) { |
2187 | goto out; | |
2188 | } | |
2189 | break; | |
2190 | ||
2191 | case OFPACT_NOTE: | |
2192 | /* Nothing to do. */ | |
2193 | break; | |
2194 | ||
2195 | case OFPACT_MULTIPATH: | |
33bf9176 | 2196 | multipath_execute(ofpact_get_MULTIPATH(a), flow, wc); |
9583bc14 EJ |
2197 | break; |
2198 | ||
2199 | case OFPACT_BUNDLE: | |
9583bc14 EJ |
2200 | xlate_bundle_action(ctx, ofpact_get_BUNDLE(a)); |
2201 | break; | |
2202 | ||
2203 | case OFPACT_OUTPUT_REG: | |
2204 | xlate_output_reg_action(ctx, ofpact_get_OUTPUT_REG(a)); | |
2205 | break; | |
2206 | ||
2207 | case OFPACT_LEARN: | |
2208 | xlate_learn_action(ctx, ofpact_get_LEARN(a)); | |
2209 | break; | |
2210 | ||
2211 | case OFPACT_EXIT: | |
2212 | ctx->exit = true; | |
2213 | break; | |
2214 | ||
2215 | case OFPACT_FIN_TIMEOUT: | |
33bf9176 | 2216 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
9583bc14 EJ |
2217 | ctx->xout->has_fin_timeout = true; |
2218 | xlate_fin_timeout(ctx, ofpact_get_FIN_TIMEOUT(a)); | |
2219 | break; | |
2220 | ||
2221 | case OFPACT_CLEAR_ACTIONS: | |
2222 | /* XXX | |
2223 | * Nothing to do because writa-actions is not supported for now. | |
2224 | * When writa-actions is supported, clear-actions also must | |
2225 | * be supported at the same time. | |
2226 | */ | |
2227 | break; | |
2228 | ||
2229 | case OFPACT_WRITE_METADATA: | |
2230 | metadata = ofpact_get_WRITE_METADATA(a); | |
33bf9176 BP |
2231 | flow->metadata &= ~metadata->mask; |
2232 | flow->metadata |= metadata->metadata & metadata->mask; | |
9583bc14 EJ |
2233 | break; |
2234 | ||
638a19b0 JR |
2235 | case OFPACT_METER: |
2236 | /* Not implemented yet. */ | |
2237 | break; | |
2238 | ||
9583bc14 EJ |
2239 | case OFPACT_GOTO_TABLE: { |
2240 | /* It is assumed that goto-table is the last action. */ | |
2241 | struct ofpact_goto_table *ogt = ofpact_get_GOTO_TABLE(a); | |
9583bc14 EJ |
2242 | |
2243 | ovs_assert(ctx->table_id < ogt->table_id); | |
4468099e EJ |
2244 | xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port, |
2245 | ogt->table_id, true); | |
9583bc14 EJ |
2246 | break; |
2247 | } | |
2248 | ||
2249 | case OFPACT_SAMPLE: | |
2250 | xlate_sample_action(ctx, ofpact_get_SAMPLE(a)); | |
2251 | break; | |
2252 | } | |
2253 | } | |
2254 | ||
2255 | out: | |
2256 | if (ctx->rule) { | |
2257 | ctx->rule->up.evictable = was_evictable; | |
2258 | } | |
2259 | } | |
2260 | ||
2261 | void | |
2262 | xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto, | |
2263 | const struct flow *flow, struct rule_dpif *rule, | |
2264 | uint8_t tcp_flags, const struct ofpbuf *packet) | |
2265 | { | |
2266 | xin->ofproto = ofproto; | |
2267 | xin->flow = *flow; | |
2268 | xin->packet = packet; | |
2269 | xin->may_learn = packet != NULL; | |
2270 | xin->rule = rule; | |
2271 | xin->ofpacts = NULL; | |
2272 | xin->ofpacts_len = 0; | |
2273 | xin->tcp_flags = tcp_flags; | |
2274 | xin->resubmit_hook = NULL; | |
2275 | xin->report_hook = NULL; | |
2276 | xin->resubmit_stats = NULL; | |
2277 | } | |
2278 | ||
2279 | void | |
2280 | xlate_out_uninit(struct xlate_out *xout) | |
2281 | { | |
2282 | if (xout) { | |
2283 | ofpbuf_uninit(&xout->odp_actions); | |
2284 | } | |
2285 | } | |
2286 | ||
2287 | /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts' | |
2288 | * into datapath actions, using 'ctx', and discards the datapath actions. */ | |
2289 | void | |
2290 | xlate_actions_for_side_effects(struct xlate_in *xin) | |
2291 | { | |
2292 | struct xlate_out xout; | |
2293 | ||
2294 | xlate_actions(xin, &xout); | |
2295 | xlate_out_uninit(&xout); | |
2296 | } | |
2297 | ||
2298 | static void | |
2299 | xlate_report(struct xlate_ctx *ctx, const char *s) | |
2300 | { | |
2301 | if (ctx->xin->report_hook) { | |
4d0acc70 | 2302 | ctx->xin->report_hook(ctx->xin, s, ctx->recurse); |
9583bc14 EJ |
2303 | } |
2304 | } | |
2305 | ||
2306 | void | |
2307 | xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src) | |
2308 | { | |
2309 | dst->wc = src->wc; | |
9583bc14 EJ |
2310 | dst->slow = src->slow; |
2311 | dst->has_learn = src->has_learn; | |
2312 | dst->has_normal = src->has_normal; | |
2313 | dst->has_fin_timeout = src->has_fin_timeout; | |
2314 | dst->nf_output_iface = src->nf_output_iface; | |
2315 | dst->mirrors = src->mirrors; | |
2316 | ||
2317 | ofpbuf_use_stub(&dst->odp_actions, dst->odp_actions_stub, | |
2318 | sizeof dst->odp_actions_stub); | |
2319 | ofpbuf_put(&dst->odp_actions, src->odp_actions.data, | |
2320 | src->odp_actions.size); | |
2321 | } | |
2322 | \f | |
55954f6e EJ |
2323 | static struct skb_priority_to_dscp * |
2324 | get_skb_priority(const struct xport *xport, uint32_t skb_priority) | |
2325 | { | |
2326 | struct skb_priority_to_dscp *pdscp; | |
2327 | uint32_t hash; | |
2328 | ||
2329 | hash = hash_int(skb_priority, 0); | |
2330 | HMAP_FOR_EACH_IN_BUCKET (pdscp, hmap_node, hash, &xport->skb_priorities) { | |
2331 | if (pdscp->skb_priority == skb_priority) { | |
2332 | return pdscp; | |
2333 | } | |
2334 | } | |
2335 | return NULL; | |
2336 | } | |
2337 | ||
2338 | static bool | |
2339 | dscp_from_skb_priority(const struct xport *xport, uint32_t skb_priority, | |
2340 | uint8_t *dscp) | |
2341 | { | |
2342 | struct skb_priority_to_dscp *pdscp = get_skb_priority(xport, skb_priority); | |
2343 | *dscp = pdscp ? pdscp->dscp : 0; | |
2344 | return pdscp != NULL; | |
2345 | } | |
2346 | ||
2347 | static void | |
2348 | clear_skb_priorities(struct xport *xport) | |
2349 | { | |
2350 | struct skb_priority_to_dscp *pdscp, *next; | |
2351 | ||
2352 | HMAP_FOR_EACH_SAFE (pdscp, next, hmap_node, &xport->skb_priorities) { | |
2353 | hmap_remove(&xport->skb_priorities, &pdscp->hmap_node); | |
2354 | free(pdscp); | |
2355 | } | |
2356 | } | |
2357 | ||
ce4a6b76 BP |
2358 | static bool |
2359 | actions_output_to_local_port(const struct xlate_ctx *ctx) | |
2360 | { | |
46c88433 | 2361 | odp_port_t local_odp_port = ofp_port_to_odp_port(ctx->xbridge, OFPP_LOCAL); |
ce4a6b76 BP |
2362 | const struct nlattr *a; |
2363 | unsigned int left; | |
2364 | ||
2365 | NL_ATTR_FOR_EACH_UNSAFE (a, left, ctx->xout->odp_actions.data, | |
2366 | ctx->xout->odp_actions.size) { | |
2367 | if (nl_attr_type(a) == OVS_ACTION_ATTR_OUTPUT | |
2368 | && nl_attr_get_odp_port(a) == local_odp_port) { | |
2369 | return true; | |
2370 | } | |
2371 | } | |
2372 | return false; | |
2373 | } | |
9583bc14 EJ |
2374 | |
2375 | /* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts' | |
2376 | * into datapath actions in 'odp_actions', using 'ctx'. */ | |
2377 | void | |
2378 | xlate_actions(struct xlate_in *xin, struct xlate_out *xout) | |
2379 | { | |
33bf9176 BP |
2380 | struct flow_wildcards *wc = &xout->wc; |
2381 | struct flow *flow = &xin->flow; | |
2382 | ||
9583bc14 EJ |
2383 | enum slow_path_reason special; |
2384 | const struct ofpact *ofpacts; | |
46c88433 | 2385 | struct xport *in_port; |
9583bc14 EJ |
2386 | struct flow orig_flow; |
2387 | struct xlate_ctx ctx; | |
2388 | size_t ofpacts_len; | |
2389 | ||
46c88433 | 2390 | COVERAGE_INC(xlate_actions); |
9583bc14 EJ |
2391 | |
2392 | /* Flow initialization rules: | |
2393 | * - 'base_flow' must match the kernel's view of the packet at the | |
2394 | * time that action processing starts. 'flow' represents any | |
2395 | * transformations we wish to make through actions. | |
2396 | * - By default 'base_flow' and 'flow' are the same since the input | |
2397 | * packet matches the output before any actions are applied. | |
2398 | * - When using VLAN splinters, 'base_flow''s VLAN is set to the value | |
2399 | * of the received packet as seen by the kernel. If we later output | |
2400 | * to another device without any modifications this will cause us to | |
2401 | * insert a new tag since the original one was stripped off by the | |
2402 | * VLAN device. | |
2403 | * - Tunnel metadata as received is retained in 'flow'. This allows | |
2404 | * tunnel metadata matching also in later tables. | |
2405 | * Since a kernel action for setting the tunnel metadata will only be | |
2406 | * generated with actual tunnel output, changing the tunnel metadata | |
2407 | * values in 'flow' (such as tun_id) will only have effect with a later | |
2408 | * tunnel output action. | |
2409 | * - Tunnel 'base_flow' is completely cleared since that is what the | |
2410 | * kernel does. If we wish to maintain the original values an action | |
2411 | * needs to be generated. */ | |
2412 | ||
2413 | ctx.xin = xin; | |
2414 | ctx.xout = xout; | |
46c88433 EJ |
2415 | ctx.xout->slow = 0; |
2416 | ctx.xout->has_learn = false; | |
2417 | ctx.xout->has_normal = false; | |
2418 | ctx.xout->has_fin_timeout = false; | |
2419 | ctx.xout->nf_output_iface = NF_OUT_DROP; | |
2420 | ctx.xout->mirrors = 0; | |
2421 | ofpbuf_use_stub(&ctx.xout->odp_actions, ctx.xout->odp_actions_stub, | |
2422 | sizeof ctx.xout->odp_actions_stub); | |
2423 | ofpbuf_reserve(&ctx.xout->odp_actions, NL_A_U32_SIZE); | |
2424 | ||
2425 | ctx.xbridge = xbridge_lookup(xin->ofproto); | |
2426 | if (!ctx.xbridge) { | |
2427 | return; | |
2428 | } | |
9583bc14 | 2429 | |
9583bc14 EJ |
2430 | ctx.rule = xin->rule; |
2431 | ||
33bf9176 | 2432 | ctx.base_flow = *flow; |
9583bc14 | 2433 | memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel); |
33bf9176 | 2434 | ctx.orig_tunnel_ip_dst = flow->tunnel.ip_dst; |
9583bc14 | 2435 | |
33bf9176 BP |
2436 | flow_wildcards_init_catchall(wc); |
2437 | memset(&wc->masks.in_port, 0xff, sizeof wc->masks.in_port); | |
1dd35f8a | 2438 | memset(&wc->masks.skb_priority, 0xff, sizeof wc->masks.skb_priority); |
7431e171 | 2439 | memset(&wc->masks.dl_type, 0xff, sizeof wc->masks.dl_type); |
1dd35f8a | 2440 | wc->masks.nw_frag |= FLOW_NW_FRAG_MASK; |
9583bc14 EJ |
2441 | |
2442 | if (tnl_port_should_receive(&ctx.xin->flow)) { | |
33bf9176 | 2443 | memset(&wc->masks.tunnel, 0xff, sizeof wc->masks.tunnel); |
8ba2ee85 JG |
2444 | /* skb_mark is currently used only by tunnels but that will likely |
2445 | * change in the future. */ | |
2446 | memset(&wc->masks.skb_mark, 0xff, sizeof wc->masks.skb_mark); | |
9583bc14 | 2447 | } |
46c88433 | 2448 | if (ctx.xbridge->has_netflow) { |
9b658910 | 2449 | netflow_mask_wc(flow, wc); |
9583bc14 EJ |
2450 | } |
2451 | ||
9583bc14 | 2452 | ctx.recurse = 0; |
33bf9176 | 2453 | ctx.orig_skb_priority = flow->skb_priority; |
9583bc14 EJ |
2454 | ctx.table_id = 0; |
2455 | ctx.exit = false; | |
2456 | ||
2457 | if (xin->ofpacts) { | |
2458 | ofpacts = xin->ofpacts; | |
2459 | ofpacts_len = xin->ofpacts_len; | |
2460 | } else if (xin->rule) { | |
2461 | ofpacts = xin->rule->up.ofpacts; | |
2462 | ofpacts_len = xin->rule->up.ofpacts_len; | |
2463 | } else { | |
2464 | NOT_REACHED(); | |
2465 | } | |
2466 | ||
2467 | ofpbuf_use_stub(&ctx.stack, ctx.init_stack, sizeof ctx.init_stack); | |
2468 | ||
ade6ad9c | 2469 | if (mbridge_has_mirrors(ctx.xbridge->mbridge)) { |
9583bc14 EJ |
2470 | /* Do this conditionally because the copy is expensive enough that it |
2471 | * shows up in profiles. */ | |
33bf9176 | 2472 | orig_flow = *flow; |
9583bc14 EJ |
2473 | } |
2474 | ||
33bf9176 | 2475 | if (flow->nw_frag & FLOW_NW_FRAG_ANY) { |
46c88433 | 2476 | switch (ctx.xbridge->frag) { |
9583bc14 EJ |
2477 | case OFPC_FRAG_NORMAL: |
2478 | /* We must pretend that transport ports are unavailable. */ | |
33bf9176 BP |
2479 | flow->tp_src = ctx.base_flow.tp_src = htons(0); |
2480 | flow->tp_dst = ctx.base_flow.tp_dst = htons(0); | |
9583bc14 EJ |
2481 | break; |
2482 | ||
2483 | case OFPC_FRAG_DROP: | |
2484 | return; | |
2485 | ||
2486 | case OFPC_FRAG_REASM: | |
2487 | NOT_REACHED(); | |
2488 | ||
2489 | case OFPC_FRAG_NX_MATCH: | |
2490 | /* Nothing to do. */ | |
2491 | break; | |
2492 | ||
2493 | case OFPC_INVALID_TTL_TO_CONTROLLER: | |
2494 | NOT_REACHED(); | |
2495 | } | |
2496 | } | |
2497 | ||
46c88433 | 2498 | in_port = get_ofp_port(ctx.xbridge, flow->in_port.ofp_port); |
642dc74d | 2499 | special = process_special(&ctx, flow, in_port, ctx.xin->packet); |
9583bc14 EJ |
2500 | if (special) { |
2501 | ctx.xout->slow = special; | |
2502 | } else { | |
9583bc14 | 2503 | size_t sample_actions_len; |
9583bc14 | 2504 | |
4e022ec0 | 2505 | if (flow->in_port.ofp_port |
46c88433 EJ |
2506 | != vsp_realdev_to_vlandev(ctx.xbridge->ofproto, |
2507 | flow->in_port.ofp_port, | |
33bf9176 | 2508 | flow->vlan_tci)) { |
9583bc14 EJ |
2509 | ctx.base_flow.vlan_tci = 0; |
2510 | } | |
2511 | ||
2512 | add_sflow_action(&ctx); | |
2513 | add_ipfix_action(&ctx); | |
2514 | sample_actions_len = ctx.xout->odp_actions.size; | |
2515 | ||
2516 | if (tunnel_ecn_ok(&ctx) && (!in_port || may_receive(in_port, &ctx))) { | |
2517 | do_xlate_actions(ofpacts, ofpacts_len, &ctx); | |
2518 | ||
2519 | /* We've let OFPP_NORMAL and the learning action look at the | |
2520 | * packet, so drop it now if forwarding is disabled. */ | |
9d189a50 | 2521 | if (in_port && !xport_stp_forward_state(in_port)) { |
9583bc14 EJ |
2522 | ctx.xout->odp_actions.size = sample_actions_len; |
2523 | } | |
2524 | } | |
2525 | ||
46c88433 | 2526 | if (ctx.xbridge->has_in_band |
ce4a6b76 BP |
2527 | && in_band_must_output_to_local_port(flow) |
2528 | && !actions_output_to_local_port(&ctx)) { | |
9583bc14 EJ |
2529 | compose_output_action(&ctx, OFPP_LOCAL); |
2530 | } | |
aaa0fbae EJ |
2531 | |
2532 | fix_sflow_action(&ctx); | |
2533 | ||
46c88433 | 2534 | if (mbridge_has_mirrors(ctx.xbridge->mbridge)) { |
9583bc14 EJ |
2535 | add_mirror_actions(&ctx, &orig_flow); |
2536 | } | |
9583bc14 EJ |
2537 | } |
2538 | ||
2539 | ofpbuf_uninit(&ctx.stack); | |
2540 | ||
2541 | /* Clear the metadata and register wildcard masks, because we won't | |
2542 | * use non-header fields as part of the cache. */ | |
33bf9176 BP |
2543 | memset(&wc->masks.metadata, 0, sizeof wc->masks.metadata); |
2544 | memset(&wc->masks.regs, 0, sizeof wc->masks.regs); | |
9583bc14 | 2545 | } |