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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 | ||
8449c4d6 EJ |
19 | #include <errno.h> |
20 | ||
db7d4e46 | 21 | #include "bfd.h" |
9583bc14 EJ |
22 | #include "bitmap.h" |
23 | #include "bond.h" | |
24 | #include "bundle.h" | |
25 | #include "byte-order.h" | |
db7d4e46 | 26 | #include "cfm.h" |
9583bc14 EJ |
27 | #include "connmgr.h" |
28 | #include "coverage.h" | |
29 | #include "dpif.h" | |
30 | #include "dynamic-string.h" | |
f7f1ea29 | 31 | #include "in-band.h" |
db7d4e46 | 32 | #include "lacp.h" |
9583bc14 | 33 | #include "learn.h" |
46c88433 | 34 | #include "list.h" |
9583bc14 EJ |
35 | #include "mac-learning.h" |
36 | #include "meta-flow.h" | |
37 | #include "multipath.h" | |
38 | #include "netdev-vport.h" | |
39 | #include "netlink.h" | |
40 | #include "nx-match.h" | |
41 | #include "odp-execute.h" | |
42 | #include "ofp-actions.h" | |
43 | #include "ofproto/ofproto-dpif-ipfix.h" | |
ec7ceaed | 44 | #include "ofproto/ofproto-dpif-mirror.h" |
9583bc14 EJ |
45 | #include "ofproto/ofproto-dpif-sflow.h" |
46 | #include "ofproto/ofproto-dpif.h" | |
47 | #include "tunnel.h" | |
48 | #include "vlog.h" | |
49 | ||
46c88433 | 50 | COVERAGE_DEFINE(xlate_actions); |
9583bc14 EJ |
51 | |
52 | VLOG_DEFINE_THIS_MODULE(ofproto_dpif_xlate); | |
53 | ||
8a553e9a EJ |
54 | /* Maximum depth of flow table recursion (due to resubmit actions) in a |
55 | * flow translation. */ | |
56 | #define MAX_RESUBMIT_RECURSION 64 | |
57 | ||
dc24a00f EJ |
58 | struct ovs_rwlock xlate_rwlock = OVS_RWLOCK_INITIALIZER; |
59 | ||
46c88433 EJ |
60 | struct xbridge { |
61 | struct hmap_node hmap_node; /* Node in global 'xbridges' map. */ | |
62 | struct ofproto_dpif *ofproto; /* Key in global 'xbridges' map. */ | |
63 | ||
64 | struct list xbundles; /* Owned xbundles. */ | |
65 | struct hmap xports; /* Indexed by ofp_port. */ | |
66 | ||
67 | char *name; /* Name used in log messages. */ | |
89a8a7f0 | 68 | struct dpif *dpif; /* Datapath interface. */ |
46c88433 EJ |
69 | struct mac_learning *ml; /* Mac learning handle. */ |
70 | struct mbridge *mbridge; /* Mirroring. */ | |
71 | struct dpif_sflow *sflow; /* SFlow handle, or null. */ | |
72 | struct dpif_ipfix *ipfix; /* Ipfix handle, or null. */ | |
9d189a50 | 73 | struct stp *stp; /* STP or null if disabled. */ |
46c88433 | 74 | |
ec89fc6f EJ |
75 | /* Special rules installed by ofproto-dpif. */ |
76 | struct rule_dpif *miss_rule; | |
77 | struct rule_dpif *no_packet_in_rule; | |
78 | ||
46c88433 | 79 | enum ofp_config_flags frag; /* Fragmentation handling. */ |
46c88433 EJ |
80 | bool has_netflow; /* Bridge runs netflow? */ |
81 | bool has_in_band; /* Bridge has in band control? */ | |
82 | bool forward_bpdu; /* Bridge forwards STP BPDUs? */ | |
83 | }; | |
84 | ||
85 | struct xbundle { | |
86 | struct hmap_node hmap_node; /* In global 'xbundles' map. */ | |
87 | struct ofbundle *ofbundle; /* Key in global 'xbundles' map. */ | |
88 | ||
89 | struct list list_node; /* In parent 'xbridges' list. */ | |
90 | struct xbridge *xbridge; /* Parent xbridge. */ | |
91 | ||
92 | struct list xports; /* Contains "struct xport"s. */ | |
93 | ||
94 | char *name; /* Name used in log messages. */ | |
95 | struct bond *bond; /* Nonnull iff more than one port. */ | |
96 | struct lacp *lacp; /* LACP handle or null. */ | |
97 | ||
98 | enum port_vlan_mode vlan_mode; /* VLAN mode. */ | |
99 | int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */ | |
100 | unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1. | |
101 | * NULL if all VLANs are trunked. */ | |
102 | bool use_priority_tags; /* Use 802.1p tag for frames in VLAN 0? */ | |
103 | bool floodable; /* No port has OFPUTIL_PC_NO_FLOOD set? */ | |
104 | }; | |
105 | ||
106 | struct xport { | |
107 | struct hmap_node hmap_node; /* Node in global 'xports' map. */ | |
108 | struct ofport_dpif *ofport; /* Key in global 'xports map. */ | |
109 | ||
110 | struct hmap_node ofp_node; /* Node in parent xbridge 'xports' map. */ | |
111 | ofp_port_t ofp_port; /* Key in parent xbridge 'xports' map. */ | |
112 | ||
113 | odp_port_t odp_port; /* Datapath port number or ODPP_NONE. */ | |
114 | ||
115 | struct list bundle_node; /* In parent xbundle (if it exists). */ | |
116 | struct xbundle *xbundle; /* Parent xbundle or null. */ | |
117 | ||
118 | struct netdev *netdev; /* 'ofport''s netdev. */ | |
119 | ||
120 | struct xbridge *xbridge; /* Parent bridge. */ | |
121 | struct xport *peer; /* Patch port peer or null. */ | |
122 | ||
123 | enum ofputil_port_config config; /* OpenFlow port configuration. */ | |
9d189a50 | 124 | int stp_port_no; /* STP port number or 0 if not in use. */ |
46c88433 | 125 | |
55954f6e EJ |
126 | struct hmap skb_priorities; /* Map of 'skb_priority_to_dscp's. */ |
127 | ||
46c88433 EJ |
128 | bool may_enable; /* May be enabled in bonds. */ |
129 | bool is_tunnel; /* Is a tunnel port. */ | |
130 | ||
131 | struct cfm *cfm; /* CFM handle or null. */ | |
132 | struct bfd *bfd; /* BFD handle or null. */ | |
133 | }; | |
134 | ||
4d0acc70 EJ |
135 | struct xlate_ctx { |
136 | struct xlate_in *xin; | |
137 | struct xlate_out *xout; | |
138 | ||
46c88433 | 139 | const struct xbridge *xbridge; |
4d0acc70 EJ |
140 | |
141 | /* Flow at the last commit. */ | |
142 | struct flow base_flow; | |
143 | ||
144 | /* Tunnel IP destination address as received. This is stored separately | |
145 | * as the base_flow.tunnel is cleared on init to reflect the datapath | |
146 | * behavior. Used to make sure not to send tunneled output to ourselves, | |
147 | * which might lead to an infinite loop. This could happen easily | |
148 | * if a tunnel is marked as 'ip_remote=flow', and the flow does not | |
149 | * actually set the tun_dst field. */ | |
150 | ovs_be32 orig_tunnel_ip_dst; | |
151 | ||
152 | /* Stack for the push and pop actions. Each stack element is of type | |
153 | * "union mf_subvalue". */ | |
154 | union mf_subvalue init_stack[1024 / sizeof(union mf_subvalue)]; | |
155 | struct ofpbuf stack; | |
156 | ||
157 | /* The rule that we are currently translating, or NULL. */ | |
158 | struct rule_dpif *rule; | |
159 | ||
160 | int recurse; /* Recursion level, via xlate_table_action. */ | |
4d0acc70 EJ |
161 | uint32_t orig_skb_priority; /* Priority when packet arrived. */ |
162 | uint8_t table_id; /* OpenFlow table ID where flow was found. */ | |
163 | uint32_t sflow_n_outputs; /* Number of output ports. */ | |
4e022ec0 | 164 | odp_port_t sflow_odp_port; /* Output port for composing sFlow action. */ |
4d0acc70 EJ |
165 | uint16_t user_cookie_offset;/* Used for user_action_cookie fixup. */ |
166 | bool exit; /* No further actions should be processed. */ | |
167 | }; | |
168 | ||
9583bc14 EJ |
169 | /* A controller may use OFPP_NONE as the ingress port to indicate that |
170 | * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for | |
171 | * when an input bundle is needed for validation (e.g., mirroring or | |
172 | * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have | |
3815d6c2 LS |
173 | * any 'port' structs, so care must be taken when dealing with it. |
174 | * The bundle's name and vlan mode are initialized in lookup_input_bundle() */ | |
175 | static struct xbundle ofpp_none_bundle; | |
9583bc14 | 176 | |
55954f6e EJ |
177 | /* Node in 'xport''s 'skb_priorities' map. Used to maintain a map from |
178 | * 'priority' (the datapath's term for QoS queue) to the dscp bits which all | |
179 | * traffic egressing the 'ofport' with that priority should be marked with. */ | |
180 | struct skb_priority_to_dscp { | |
181 | struct hmap_node hmap_node; /* Node in 'ofport_dpif''s 'skb_priorities'. */ | |
182 | uint32_t skb_priority; /* Priority of this queue (see struct flow). */ | |
183 | ||
184 | uint8_t dscp; /* DSCP bits to mark outgoing traffic with. */ | |
185 | }; | |
186 | ||
46c88433 EJ |
187 | static struct hmap xbridges = HMAP_INITIALIZER(&xbridges); |
188 | static struct hmap xbundles = HMAP_INITIALIZER(&xbundles); | |
189 | static struct hmap xports = HMAP_INITIALIZER(&xports); | |
190 | ||
191 | static bool may_receive(const struct xport *, struct xlate_ctx *); | |
9583bc14 EJ |
192 | static void do_xlate_actions(const struct ofpact *, size_t ofpacts_len, |
193 | struct xlate_ctx *); | |
194 | static void xlate_normal(struct xlate_ctx *); | |
195 | static void xlate_report(struct xlate_ctx *, const char *); | |
4e022ec0 | 196 | static void xlate_table_action(struct xlate_ctx *, ofp_port_t in_port, |
9583bc14 | 197 | uint8_t table_id, bool may_packet_in); |
46c88433 EJ |
198 | static bool input_vid_is_valid(uint16_t vid, struct xbundle *, bool warn); |
199 | static uint16_t input_vid_to_vlan(const struct xbundle *, uint16_t vid); | |
200 | static void output_normal(struct xlate_ctx *, const struct xbundle *, | |
9583bc14 | 201 | uint16_t vlan); |
4e022ec0 | 202 | static void compose_output_action(struct xlate_ctx *, ofp_port_t ofp_port); |
9583bc14 EJ |
203 | |
204 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
205 | ||
46c88433 EJ |
206 | static struct xbridge *xbridge_lookup(const struct ofproto_dpif *); |
207 | static struct xbundle *xbundle_lookup(const struct ofbundle *); | |
5e6af486 | 208 | static struct xport *xport_lookup(const struct ofport_dpif *); |
46c88433 | 209 | static struct xport *get_ofp_port(const struct xbridge *, ofp_port_t ofp_port); |
55954f6e EJ |
210 | static struct skb_priority_to_dscp *get_skb_priority(const struct xport *, |
211 | uint32_t skb_priority); | |
212 | static void clear_skb_priorities(struct xport *); | |
213 | static bool dscp_from_skb_priority(const struct xport *, uint32_t skb_priority, | |
214 | uint8_t *dscp); | |
46c88433 EJ |
215 | |
216 | void | |
217 | xlate_ofproto_set(struct ofproto_dpif *ofproto, const char *name, | |
ec89fc6f EJ |
218 | struct dpif *dpif, struct rule_dpif *miss_rule, |
219 | struct rule_dpif *no_packet_in_rule, | |
220 | const struct mac_learning *ml, struct stp *stp, | |
221 | const struct mbridge *mbridge, | |
46c88433 EJ |
222 | const struct dpif_sflow *sflow, |
223 | const struct dpif_ipfix *ipfix, enum ofp_config_flags frag, | |
9d189a50 | 224 | bool forward_bpdu, bool has_in_band, bool has_netflow) |
46c88433 EJ |
225 | { |
226 | struct xbridge *xbridge = xbridge_lookup(ofproto); | |
227 | ||
228 | if (!xbridge) { | |
229 | xbridge = xzalloc(sizeof *xbridge); | |
230 | xbridge->ofproto = ofproto; | |
231 | ||
232 | hmap_insert(&xbridges, &xbridge->hmap_node, hash_pointer(ofproto, 0)); | |
233 | hmap_init(&xbridge->xports); | |
234 | list_init(&xbridge->xbundles); | |
235 | } | |
236 | ||
237 | if (xbridge->ml != ml) { | |
238 | mac_learning_unref(xbridge->ml); | |
239 | xbridge->ml = mac_learning_ref(ml); | |
240 | } | |
241 | ||
242 | if (xbridge->mbridge != mbridge) { | |
243 | mbridge_unref(xbridge->mbridge); | |
244 | xbridge->mbridge = mbridge_ref(mbridge); | |
245 | } | |
246 | ||
247 | if (xbridge->sflow != sflow) { | |
248 | dpif_sflow_unref(xbridge->sflow); | |
249 | xbridge->sflow = dpif_sflow_ref(sflow); | |
250 | } | |
251 | ||
252 | if (xbridge->ipfix != ipfix) { | |
253 | dpif_ipfix_unref(xbridge->ipfix); | |
254 | xbridge->ipfix = dpif_ipfix_ref(ipfix); | |
255 | } | |
256 | ||
9d189a50 EJ |
257 | if (xbridge->stp != stp) { |
258 | stp_unref(xbridge->stp); | |
259 | xbridge->stp = stp_ref(stp); | |
260 | } | |
261 | ||
46c88433 EJ |
262 | free(xbridge->name); |
263 | xbridge->name = xstrdup(name); | |
264 | ||
89a8a7f0 | 265 | xbridge->dpif = dpif; |
46c88433 EJ |
266 | xbridge->forward_bpdu = forward_bpdu; |
267 | xbridge->has_in_band = has_in_band; | |
268 | xbridge->has_netflow = has_netflow; | |
46c88433 | 269 | xbridge->frag = frag; |
ec89fc6f EJ |
270 | xbridge->miss_rule = miss_rule; |
271 | xbridge->no_packet_in_rule = no_packet_in_rule; | |
46c88433 EJ |
272 | } |
273 | ||
274 | void | |
275 | xlate_remove_ofproto(struct ofproto_dpif *ofproto) | |
276 | { | |
277 | struct xbridge *xbridge = xbridge_lookup(ofproto); | |
278 | struct xbundle *xbundle, *next_xbundle; | |
279 | struct xport *xport, *next_xport; | |
280 | ||
281 | if (!xbridge) { | |
282 | return; | |
283 | } | |
284 | ||
285 | HMAP_FOR_EACH_SAFE (xport, next_xport, ofp_node, &xbridge->xports) { | |
286 | xlate_ofport_remove(xport->ofport); | |
287 | } | |
288 | ||
289 | LIST_FOR_EACH_SAFE (xbundle, next_xbundle, list_node, &xbridge->xbundles) { | |
290 | xlate_bundle_remove(xbundle->ofbundle); | |
291 | } | |
292 | ||
293 | hmap_remove(&xbridges, &xbridge->hmap_node); | |
294 | free(xbridge->name); | |
295 | free(xbridge); | |
296 | } | |
297 | ||
298 | void | |
299 | xlate_bundle_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle, | |
300 | const char *name, enum port_vlan_mode vlan_mode, int vlan, | |
301 | unsigned long *trunks, bool use_priority_tags, | |
302 | const struct bond *bond, const struct lacp *lacp, | |
303 | bool floodable) | |
304 | { | |
305 | struct xbundle *xbundle = xbundle_lookup(ofbundle); | |
306 | ||
307 | if (!xbundle) { | |
308 | xbundle = xzalloc(sizeof *xbundle); | |
309 | xbundle->ofbundle = ofbundle; | |
310 | xbundle->xbridge = xbridge_lookup(ofproto); | |
311 | ||
312 | hmap_insert(&xbundles, &xbundle->hmap_node, hash_pointer(ofbundle, 0)); | |
313 | list_insert(&xbundle->xbridge->xbundles, &xbundle->list_node); | |
314 | list_init(&xbundle->xports); | |
315 | } | |
316 | ||
317 | ovs_assert(xbundle->xbridge); | |
318 | ||
319 | free(xbundle->name); | |
320 | xbundle->name = xstrdup(name); | |
321 | ||
322 | xbundle->vlan_mode = vlan_mode; | |
323 | xbundle->vlan = vlan; | |
324 | xbundle->trunks = trunks; | |
325 | xbundle->use_priority_tags = use_priority_tags; | |
326 | xbundle->floodable = floodable; | |
327 | ||
328 | if (xbundle->bond != bond) { | |
329 | bond_unref(xbundle->bond); | |
330 | xbundle->bond = bond_ref(bond); | |
331 | } | |
332 | ||
333 | if (xbundle->lacp != lacp) { | |
334 | lacp_unref(xbundle->lacp); | |
335 | xbundle->lacp = lacp_ref(lacp); | |
336 | } | |
337 | } | |
338 | ||
339 | void | |
340 | xlate_bundle_remove(struct ofbundle *ofbundle) | |
341 | { | |
342 | struct xbundle *xbundle = xbundle_lookup(ofbundle); | |
343 | struct xport *xport, *next; | |
344 | ||
345 | if (!xbundle) { | |
346 | return; | |
347 | } | |
348 | ||
349 | LIST_FOR_EACH_SAFE (xport, next, bundle_node, &xbundle->xports) { | |
350 | list_remove(&xport->bundle_node); | |
351 | xport->xbundle = NULL; | |
352 | } | |
353 | ||
354 | hmap_remove(&xbundles, &xbundle->hmap_node); | |
355 | list_remove(&xbundle->list_node); | |
356 | bond_unref(xbundle->bond); | |
357 | lacp_unref(xbundle->lacp); | |
358 | free(xbundle->name); | |
359 | free(xbundle); | |
360 | } | |
361 | ||
362 | void | |
363 | xlate_ofport_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle, | |
364 | struct ofport_dpif *ofport, ofp_port_t ofp_port, | |
365 | odp_port_t odp_port, const struct netdev *netdev, | |
366 | const struct cfm *cfm, const struct bfd *bfd, | |
9d189a50 | 367 | struct ofport_dpif *peer, int stp_port_no, |
55954f6e | 368 | const struct ofproto_port_queue *qdscp_list, size_t n_qdscp, |
9d189a50 EJ |
369 | enum ofputil_port_config config, bool is_tunnel, |
370 | bool may_enable) | |
46c88433 EJ |
371 | { |
372 | struct xport *xport = xport_lookup(ofport); | |
55954f6e | 373 | size_t i; |
46c88433 EJ |
374 | |
375 | if (!xport) { | |
376 | xport = xzalloc(sizeof *xport); | |
377 | xport->ofport = ofport; | |
378 | xport->xbridge = xbridge_lookup(ofproto); | |
379 | xport->ofp_port = ofp_port; | |
380 | ||
55954f6e | 381 | hmap_init(&xport->skb_priorities); |
46c88433 EJ |
382 | hmap_insert(&xports, &xport->hmap_node, hash_pointer(ofport, 0)); |
383 | hmap_insert(&xport->xbridge->xports, &xport->ofp_node, | |
384 | hash_ofp_port(xport->ofp_port)); | |
385 | } | |
386 | ||
387 | ovs_assert(xport->ofp_port == ofp_port); | |
388 | ||
389 | xport->config = config; | |
9d189a50 | 390 | xport->stp_port_no = stp_port_no; |
46c88433 EJ |
391 | xport->is_tunnel = is_tunnel; |
392 | xport->may_enable = may_enable; | |
393 | xport->odp_port = odp_port; | |
394 | ||
395 | if (xport->netdev != netdev) { | |
396 | netdev_close(xport->netdev); | |
397 | xport->netdev = netdev_ref(netdev); | |
398 | } | |
399 | ||
400 | if (xport->cfm != cfm) { | |
401 | cfm_unref(xport->cfm); | |
402 | xport->cfm = cfm_ref(cfm); | |
403 | } | |
404 | ||
405 | if (xport->bfd != bfd) { | |
406 | bfd_unref(xport->bfd); | |
407 | xport->bfd = bfd_ref(bfd); | |
408 | } | |
409 | ||
410 | if (xport->peer) { | |
411 | xport->peer->peer = NULL; | |
412 | } | |
5e6af486 | 413 | xport->peer = xport_lookup(peer); |
46c88433 EJ |
414 | if (xport->peer) { |
415 | xport->peer->peer = xport; | |
416 | } | |
417 | ||
418 | if (xport->xbundle) { | |
419 | list_remove(&xport->bundle_node); | |
420 | } | |
5e6af486 | 421 | xport->xbundle = xbundle_lookup(ofbundle); |
46c88433 EJ |
422 | if (xport->xbundle) { |
423 | list_insert(&xport->xbundle->xports, &xport->bundle_node); | |
424 | } | |
55954f6e EJ |
425 | |
426 | clear_skb_priorities(xport); | |
427 | for (i = 0; i < n_qdscp; i++) { | |
428 | struct skb_priority_to_dscp *pdscp; | |
429 | uint32_t skb_priority; | |
430 | ||
89a8a7f0 EJ |
431 | if (dpif_queue_to_priority(xport->xbridge->dpif, qdscp_list[i].queue, |
432 | &skb_priority)) { | |
55954f6e EJ |
433 | continue; |
434 | } | |
435 | ||
436 | pdscp = xmalloc(sizeof *pdscp); | |
437 | pdscp->skb_priority = skb_priority; | |
438 | pdscp->dscp = (qdscp_list[i].dscp << 2) & IP_DSCP_MASK; | |
439 | hmap_insert(&xport->skb_priorities, &pdscp->hmap_node, | |
440 | hash_int(pdscp->skb_priority, 0)); | |
441 | } | |
46c88433 EJ |
442 | } |
443 | ||
444 | void | |
445 | xlate_ofport_remove(struct ofport_dpif *ofport) | |
446 | { | |
447 | struct xport *xport = xport_lookup(ofport); | |
448 | ||
449 | if (!xport) { | |
450 | return; | |
451 | } | |
452 | ||
453 | if (xport->peer) { | |
454 | xport->peer->peer = NULL; | |
455 | xport->peer = NULL; | |
456 | } | |
457 | ||
e621a12d EJ |
458 | if (xport->xbundle) { |
459 | list_remove(&xport->bundle_node); | |
460 | } | |
461 | ||
55954f6e EJ |
462 | clear_skb_priorities(xport); |
463 | hmap_destroy(&xport->skb_priorities); | |
464 | ||
46c88433 EJ |
465 | hmap_remove(&xports, &xport->hmap_node); |
466 | hmap_remove(&xport->xbridge->xports, &xport->ofp_node); | |
467 | ||
468 | netdev_close(xport->netdev); | |
469 | cfm_unref(xport->cfm); | |
470 | bfd_unref(xport->bfd); | |
471 | free(xport); | |
472 | } | |
473 | ||
8449c4d6 EJ |
474 | /* Given a datpath, packet, and flow metadata ('backer', 'packet', and 'key' |
475 | * respectively), populates 'flow' with the result of odp_flow_key_to_flow(). | |
476 | * Optionally, if nonnull, populates 'fitnessp' with the fitness of 'flow' as | |
477 | * returned by odp_flow_key_to_flow(). Also, optionally populates 'ofproto' | |
478 | * with the ofproto_dpif, and 'odp_in_port' with the datapath in_port, that | |
479 | * 'packet' ingressed. | |
480 | * | |
481 | * If 'ofproto' is nonnull, requires 'flow''s in_port to exist. Otherwise sets | |
482 | * 'flow''s in_port to OFPP_NONE. | |
483 | * | |
484 | * This function does post-processing on data returned from | |
485 | * odp_flow_key_to_flow() to help make VLAN splinters transparent to the rest | |
486 | * of the upcall processing logic. In particular, if the extracted in_port is | |
487 | * a VLAN splinter port, it replaces flow->in_port by the "real" port, sets | |
488 | * flow->vlan_tci correctly for the VLAN of the VLAN splinter port, and pushes | |
489 | * a VLAN header onto 'packet' (if it is nonnull). | |
490 | * | |
491 | * Similarly, this function also includes some logic to help with tunnels. It | |
492 | * may modify 'flow' as necessary to make the tunneling implementation | |
493 | * transparent to the upcall processing logic. | |
494 | * | |
495 | * Returns 0 if successful, ENODEV if the parsed flow has no associated ofport, | |
496 | * or some other positive errno if there are other problems. */ | |
497 | int | |
498 | xlate_receive(const struct dpif_backer *backer, struct ofpbuf *packet, | |
499 | const struct nlattr *key, size_t key_len, | |
500 | struct flow *flow, enum odp_key_fitness *fitnessp, | |
501 | struct ofproto_dpif **ofproto, odp_port_t *odp_in_port) | |
502 | { | |
503 | enum odp_key_fitness fitness; | |
504 | const struct xport *xport; | |
505 | int error = ENODEV; | |
506 | ||
dc24a00f | 507 | ovs_rwlock_rdlock(&xlate_rwlock); |
8449c4d6 EJ |
508 | fitness = odp_flow_key_to_flow(key, key_len, flow); |
509 | if (fitness == ODP_FIT_ERROR) { | |
510 | error = EINVAL; | |
511 | goto exit; | |
512 | } | |
513 | ||
514 | if (odp_in_port) { | |
515 | *odp_in_port = flow->in_port.odp_port; | |
516 | } | |
517 | ||
518 | xport = xport_lookup(tnl_port_should_receive(flow) | |
519 | ? tnl_port_receive(flow) | |
520 | : odp_port_to_ofport(backer, flow->in_port.odp_port)); | |
521 | ||
522 | flow->in_port.ofp_port = xport ? xport->ofp_port : OFPP_NONE; | |
523 | if (!xport) { | |
524 | goto exit; | |
525 | } | |
526 | ||
527 | if (vsp_adjust_flow(xport->xbridge->ofproto, flow)) { | |
528 | if (packet) { | |
529 | /* Make the packet resemble the flow, so that it gets sent to | |
530 | * an OpenFlow controller properly, so that it looks correct | |
531 | * for sFlow, and so that flow_extract() will get the correct | |
532 | * vlan_tci if it is called on 'packet'. | |
533 | * | |
534 | * The allocated space inside 'packet' probably also contains | |
535 | * 'key', that is, both 'packet' and 'key' are probably part of | |
536 | * a struct dpif_upcall (see the large comment on that | |
537 | * structure definition), so pushing data on 'packet' is in | |
538 | * general not a good idea since it could overwrite 'key' or | |
539 | * free it as a side effect. However, it's OK in this special | |
540 | * case because we know that 'packet' is inside a Netlink | |
541 | * attribute: pushing 4 bytes will just overwrite the 4-byte | |
542 | * "struct nlattr", which is fine since we don't need that | |
543 | * header anymore. */ | |
544 | eth_push_vlan(packet, flow->vlan_tci); | |
545 | } | |
546 | /* We can't reproduce 'key' from 'flow'. */ | |
547 | fitness = fitness == ODP_FIT_PERFECT ? ODP_FIT_TOO_MUCH : fitness; | |
548 | } | |
549 | error = 0; | |
550 | ||
551 | if (ofproto) { | |
552 | *ofproto = xport->xbridge->ofproto; | |
553 | } | |
554 | ||
555 | exit: | |
556 | if (fitnessp) { | |
557 | *fitnessp = fitness; | |
558 | } | |
dc24a00f | 559 | ovs_rwlock_unlock(&xlate_rwlock); |
8449c4d6 EJ |
560 | return error; |
561 | } | |
562 | ||
46c88433 EJ |
563 | static struct xbridge * |
564 | xbridge_lookup(const struct ofproto_dpif *ofproto) | |
565 | { | |
566 | struct xbridge *xbridge; | |
567 | ||
5e6af486 EJ |
568 | if (!ofproto) { |
569 | return NULL; | |
570 | } | |
571 | ||
46c88433 EJ |
572 | HMAP_FOR_EACH_IN_BUCKET (xbridge, hmap_node, hash_pointer(ofproto, 0), |
573 | &xbridges) { | |
574 | if (xbridge->ofproto == ofproto) { | |
575 | return xbridge; | |
576 | } | |
577 | } | |
578 | return NULL; | |
579 | } | |
580 | ||
581 | static struct xbundle * | |
582 | xbundle_lookup(const struct ofbundle *ofbundle) | |
583 | { | |
584 | struct xbundle *xbundle; | |
585 | ||
5e6af486 EJ |
586 | if (!ofbundle) { |
587 | return NULL; | |
588 | } | |
589 | ||
46c88433 EJ |
590 | HMAP_FOR_EACH_IN_BUCKET (xbundle, hmap_node, hash_pointer(ofbundle, 0), |
591 | &xbundles) { | |
592 | if (xbundle->ofbundle == ofbundle) { | |
593 | return xbundle; | |
594 | } | |
595 | } | |
596 | return NULL; | |
597 | } | |
598 | ||
599 | static struct xport * | |
5e6af486 | 600 | xport_lookup(const struct ofport_dpif *ofport) |
46c88433 EJ |
601 | { |
602 | struct xport *xport; | |
603 | ||
5e6af486 EJ |
604 | if (!ofport) { |
605 | return NULL; | |
606 | } | |
607 | ||
46c88433 EJ |
608 | HMAP_FOR_EACH_IN_BUCKET (xport, hmap_node, hash_pointer(ofport, 0), |
609 | &xports) { | |
610 | if (xport->ofport == ofport) { | |
611 | return xport; | |
612 | } | |
613 | } | |
614 | return NULL; | |
615 | } | |
616 | ||
40085e56 EJ |
617 | static struct stp_port * |
618 | xport_get_stp_port(const struct xport *xport) | |
619 | { | |
620 | return xport->xbridge->stp && xport->stp_port_no | |
621 | ? stp_get_port(xport->xbridge->stp, xport->stp_port_no) | |
622 | : NULL; | |
623 | } | |
9d189a50 EJ |
624 | |
625 | static enum stp_state | |
626 | xport_stp_learn_state(const struct xport *xport) | |
627 | { | |
40085e56 EJ |
628 | struct stp_port *sp = xport_get_stp_port(xport); |
629 | return stp_learn_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED); | |
9d189a50 EJ |
630 | } |
631 | ||
632 | static bool | |
633 | xport_stp_forward_state(const struct xport *xport) | |
634 | { | |
40085e56 EJ |
635 | struct stp_port *sp = xport_get_stp_port(xport); |
636 | return stp_forward_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED); | |
9d189a50 EJ |
637 | } |
638 | ||
639 | /* Returns true if STP should process 'flow'. Sets fields in 'wc' that | |
640 | * were used to make the determination.*/ | |
641 | static bool | |
642 | stp_should_process_flow(const struct flow *flow, struct flow_wildcards *wc) | |
643 | { | |
644 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
645 | return eth_addr_equals(flow->dl_dst, eth_addr_stp); | |
646 | } | |
647 | ||
648 | static void | |
649 | stp_process_packet(const struct xport *xport, const struct ofpbuf *packet) | |
650 | { | |
40085e56 | 651 | struct stp_port *sp = xport_get_stp_port(xport); |
9d189a50 EJ |
652 | struct ofpbuf payload = *packet; |
653 | struct eth_header *eth = payload.data; | |
9d189a50 EJ |
654 | |
655 | /* Sink packets on ports that have STP disabled when the bridge has | |
656 | * STP enabled. */ | |
657 | if (!sp || stp_port_get_state(sp) == STP_DISABLED) { | |
658 | return; | |
659 | } | |
660 | ||
661 | /* Trim off padding on payload. */ | |
662 | if (payload.size > ntohs(eth->eth_type) + ETH_HEADER_LEN) { | |
663 | payload.size = ntohs(eth->eth_type) + ETH_HEADER_LEN; | |
664 | } | |
665 | ||
666 | if (ofpbuf_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) { | |
667 | stp_received_bpdu(sp, payload.data, payload.size); | |
668 | } | |
669 | } | |
670 | ||
46c88433 EJ |
671 | static struct xport * |
672 | get_ofp_port(const struct xbridge *xbridge, ofp_port_t ofp_port) | |
673 | { | |
674 | struct xport *xport; | |
675 | ||
676 | HMAP_FOR_EACH_IN_BUCKET (xport, ofp_node, hash_ofp_port(ofp_port), | |
677 | &xbridge->xports) { | |
678 | if (xport->ofp_port == ofp_port) { | |
679 | return xport; | |
680 | } | |
681 | } | |
682 | return NULL; | |
683 | } | |
684 | ||
685 | static odp_port_t | |
686 | ofp_port_to_odp_port(const struct xbridge *xbridge, ofp_port_t ofp_port) | |
687 | { | |
688 | const struct xport *xport = get_ofp_port(xbridge, ofp_port); | |
689 | return xport ? xport->odp_port : ODPP_NONE; | |
690 | } | |
691 | ||
9583bc14 | 692 | static bool |
46c88433 | 693 | xbundle_trunks_vlan(const struct xbundle *bundle, uint16_t vlan) |
9583bc14 EJ |
694 | { |
695 | return (bundle->vlan_mode != PORT_VLAN_ACCESS | |
696 | && (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan))); | |
697 | } | |
698 | ||
699 | static bool | |
46c88433 EJ |
700 | xbundle_includes_vlan(const struct xbundle *xbundle, uint16_t vlan) |
701 | { | |
702 | return vlan == xbundle->vlan || xbundle_trunks_vlan(xbundle, vlan); | |
703 | } | |
704 | ||
705 | static mirror_mask_t | |
706 | xbundle_mirror_out(const struct xbridge *xbridge, struct xbundle *xbundle) | |
707 | { | |
708 | return xbundle != &ofpp_none_bundle | |
709 | ? mirror_bundle_out(xbridge->mbridge, xbundle->ofbundle) | |
710 | : 0; | |
711 | } | |
712 | ||
713 | static mirror_mask_t | |
714 | xbundle_mirror_src(const struct xbridge *xbridge, struct xbundle *xbundle) | |
9583bc14 | 715 | { |
46c88433 EJ |
716 | return xbundle != &ofpp_none_bundle |
717 | ? mirror_bundle_src(xbridge->mbridge, xbundle->ofbundle) | |
718 | : 0; | |
9583bc14 EJ |
719 | } |
720 | ||
46c88433 EJ |
721 | static mirror_mask_t |
722 | xbundle_mirror_dst(const struct xbridge *xbridge, struct xbundle *xbundle) | |
9583bc14 | 723 | { |
46c88433 EJ |
724 | return xbundle != &ofpp_none_bundle |
725 | ? mirror_bundle_dst(xbridge->mbridge, xbundle->ofbundle) | |
726 | : 0; | |
727 | } | |
728 | ||
729 | static struct xbundle * | |
730 | lookup_input_bundle(const struct xbridge *xbridge, ofp_port_t in_port, | |
731 | bool warn, struct xport **in_xportp) | |
732 | { | |
733 | struct xport *xport; | |
9583bc14 EJ |
734 | |
735 | /* Find the port and bundle for the received packet. */ | |
46c88433 EJ |
736 | xport = get_ofp_port(xbridge, in_port); |
737 | if (in_xportp) { | |
738 | *in_xportp = xport; | |
9583bc14 | 739 | } |
46c88433 EJ |
740 | if (xport && xport->xbundle) { |
741 | return xport->xbundle; | |
9583bc14 EJ |
742 | } |
743 | ||
744 | /* Special-case OFPP_NONE, which a controller may use as the ingress | |
745 | * port for traffic that it is sourcing. */ | |
746 | if (in_port == OFPP_NONE) { | |
3815d6c2 LS |
747 | ofpp_none_bundle.name = "OFPP_NONE"; |
748 | ofpp_none_bundle.vlan_mode = PORT_VLAN_TRUNK; | |
9583bc14 EJ |
749 | return &ofpp_none_bundle; |
750 | } | |
751 | ||
752 | /* Odd. A few possible reasons here: | |
753 | * | |
754 | * - We deleted a port but there are still a few packets queued up | |
755 | * from it. | |
756 | * | |
757 | * - Someone externally added a port (e.g. "ovs-dpctl add-if") that | |
758 | * we don't know about. | |
759 | * | |
760 | * - The ofproto client didn't configure the port as part of a bundle. | |
761 | * This is particularly likely to happen if a packet was received on the | |
762 | * port after it was created, but before the client had a chance to | |
763 | * configure its bundle. | |
764 | */ | |
765 | if (warn) { | |
766 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
767 | ||
768 | VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown " | |
46c88433 | 769 | "port %"PRIu16, xbridge->name, in_port); |
9583bc14 EJ |
770 | } |
771 | return NULL; | |
772 | } | |
773 | ||
774 | static void | |
775 | add_mirror_actions(struct xlate_ctx *ctx, const struct flow *orig_flow) | |
776 | { | |
46c88433 | 777 | const struct xbridge *xbridge = ctx->xbridge; |
9583bc14 | 778 | mirror_mask_t mirrors; |
46c88433 | 779 | struct xbundle *in_xbundle; |
9583bc14 EJ |
780 | uint16_t vlan; |
781 | uint16_t vid; | |
cdf5d3a5 EJ |
782 | |
783 | mirrors = ctx->xout->mirrors; | |
784 | ctx->xout->mirrors = 0; | |
9583bc14 | 785 | |
46c88433 EJ |
786 | in_xbundle = lookup_input_bundle(xbridge, orig_flow->in_port.ofp_port, |
787 | ctx->xin->packet != NULL, NULL); | |
788 | if (!in_xbundle) { | |
9583bc14 EJ |
789 | return; |
790 | } | |
46c88433 | 791 | mirrors |= xbundle_mirror_src(xbridge, in_xbundle); |
9583bc14 EJ |
792 | |
793 | /* Drop frames on bundles reserved for mirroring. */ | |
46c88433 | 794 | if (xbundle_mirror_out(xbridge, in_xbundle)) { |
9583bc14 EJ |
795 | if (ctx->xin->packet != NULL) { |
796 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
797 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port " | |
798 | "%s, which is reserved exclusively for mirroring", | |
46c88433 | 799 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 | 800 | } |
aaa0fbae | 801 | ofpbuf_clear(&ctx->xout->odp_actions); |
9583bc14 EJ |
802 | return; |
803 | } | |
804 | ||
805 | /* Check VLAN. */ | |
806 | vid = vlan_tci_to_vid(orig_flow->vlan_tci); | |
46c88433 | 807 | if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) { |
9583bc14 EJ |
808 | return; |
809 | } | |
46c88433 | 810 | vlan = input_vid_to_vlan(in_xbundle, vid); |
9583bc14 | 811 | |
9583bc14 EJ |
812 | if (!mirrors) { |
813 | return; | |
814 | } | |
815 | ||
816 | /* Restore the original packet before adding the mirror actions. */ | |
817 | ctx->xin->flow = *orig_flow; | |
818 | ||
819 | while (mirrors) { | |
ec7ceaed EJ |
820 | mirror_mask_t dup_mirrors; |
821 | struct ofbundle *out; | |
822 | unsigned long *vlans; | |
823 | bool vlan_mirrored; | |
824 | bool has_mirror; | |
825 | int out_vlan; | |
826 | ||
46c88433 | 827 | has_mirror = mirror_get(xbridge->mbridge, mirror_mask_ffs(mirrors) - 1, |
ec7ceaed EJ |
828 | &vlans, &dup_mirrors, &out, &out_vlan); |
829 | ovs_assert(has_mirror); | |
830 | ||
831 | if (vlans) { | |
9583bc14 EJ |
832 | ctx->xout->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK); |
833 | } | |
ec7ceaed EJ |
834 | vlan_mirrored = !vlans || bitmap_is_set(vlans, vlan); |
835 | free(vlans); | |
9583bc14 | 836 | |
ec7ceaed | 837 | if (!vlan_mirrored) { |
9583bc14 EJ |
838 | mirrors = zero_rightmost_1bit(mirrors); |
839 | continue; | |
840 | } | |
841 | ||
ec7ceaed EJ |
842 | mirrors &= ~dup_mirrors; |
843 | ctx->xout->mirrors |= dup_mirrors; | |
844 | if (out) { | |
46c88433 EJ |
845 | struct xbundle *out_xbundle = xbundle_lookup(out); |
846 | if (out_xbundle) { | |
847 | output_normal(ctx, out_xbundle, vlan); | |
848 | } | |
ec7ceaed | 849 | } else if (vlan != out_vlan |
9583bc14 | 850 | && !eth_addr_is_reserved(orig_flow->dl_dst)) { |
46c88433 | 851 | struct xbundle *xbundle; |
9583bc14 | 852 | |
46c88433 EJ |
853 | LIST_FOR_EACH (xbundle, list_node, &xbridge->xbundles) { |
854 | if (xbundle_includes_vlan(xbundle, out_vlan) | |
855 | && !xbundle_mirror_out(xbridge, xbundle)) { | |
856 | output_normal(ctx, xbundle, out_vlan); | |
9583bc14 EJ |
857 | } |
858 | } | |
859 | } | |
860 | } | |
861 | } | |
862 | ||
863 | /* Given 'vid', the VID obtained from the 802.1Q header that was received as | |
46c88433 | 864 | * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle', |
9583bc14 EJ |
865 | * the bundle on which the packet was received, returns the VLAN to which the |
866 | * packet belongs. | |
867 | * | |
868 | * Both 'vid' and the return value are in the range 0...4095. */ | |
869 | static uint16_t | |
46c88433 | 870 | input_vid_to_vlan(const struct xbundle *in_xbundle, uint16_t vid) |
9583bc14 | 871 | { |
46c88433 | 872 | switch (in_xbundle->vlan_mode) { |
9583bc14 | 873 | case PORT_VLAN_ACCESS: |
46c88433 | 874 | return in_xbundle->vlan; |
9583bc14 EJ |
875 | break; |
876 | ||
877 | case PORT_VLAN_TRUNK: | |
878 | return vid; | |
879 | ||
880 | case PORT_VLAN_NATIVE_UNTAGGED: | |
881 | case PORT_VLAN_NATIVE_TAGGED: | |
46c88433 | 882 | return vid ? vid : in_xbundle->vlan; |
9583bc14 EJ |
883 | |
884 | default: | |
885 | NOT_REACHED(); | |
886 | } | |
887 | } | |
888 | ||
46c88433 | 889 | /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'. |
9583bc14 EJ |
890 | * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs |
891 | * a warning. | |
892 | * | |
893 | * 'vid' should be the VID obtained from the 802.1Q header that was received as | |
894 | * part of a packet (specify 0 if there was no 802.1Q header), in the range | |
895 | * 0...4095. */ | |
896 | static bool | |
46c88433 | 897 | input_vid_is_valid(uint16_t vid, struct xbundle *in_xbundle, bool warn) |
9583bc14 EJ |
898 | { |
899 | /* Allow any VID on the OFPP_NONE port. */ | |
46c88433 | 900 | if (in_xbundle == &ofpp_none_bundle) { |
9583bc14 EJ |
901 | return true; |
902 | } | |
903 | ||
46c88433 | 904 | switch (in_xbundle->vlan_mode) { |
9583bc14 EJ |
905 | case PORT_VLAN_ACCESS: |
906 | if (vid) { | |
907 | if (warn) { | |
908 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
46c88433 | 909 | VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" tagged " |
9583bc14 | 910 | "packet received on port %s configured as VLAN " |
46c88433 EJ |
911 | "%"PRIu16" access port", vid, in_xbundle->name, |
912 | in_xbundle->vlan); | |
9583bc14 EJ |
913 | } |
914 | return false; | |
915 | } | |
916 | return true; | |
917 | ||
918 | case PORT_VLAN_NATIVE_UNTAGGED: | |
919 | case PORT_VLAN_NATIVE_TAGGED: | |
920 | if (!vid) { | |
921 | /* Port must always carry its native VLAN. */ | |
922 | return true; | |
923 | } | |
924 | /* Fall through. */ | |
925 | case PORT_VLAN_TRUNK: | |
46c88433 | 926 | if (!xbundle_includes_vlan(in_xbundle, vid)) { |
9583bc14 EJ |
927 | if (warn) { |
928 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
46c88433 | 929 | VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" packet " |
9583bc14 | 930 | "received on port %s not configured for trunking " |
46c88433 | 931 | "VLAN %"PRIu16, vid, in_xbundle->name, vid); |
9583bc14 EJ |
932 | } |
933 | return false; | |
934 | } | |
935 | return true; | |
936 | ||
937 | default: | |
938 | NOT_REACHED(); | |
939 | } | |
940 | ||
941 | } | |
942 | ||
943 | /* Given 'vlan', the VLAN that a packet belongs to, and | |
46c88433 | 944 | * 'out_xbundle', a bundle on which the packet is to be output, returns the VID |
9583bc14 EJ |
945 | * that should be included in the 802.1Q header. (If the return value is 0, |
946 | * then the 802.1Q header should only be included in the packet if there is a | |
947 | * nonzero PCP.) | |
948 | * | |
949 | * Both 'vlan' and the return value are in the range 0...4095. */ | |
950 | static uint16_t | |
46c88433 | 951 | output_vlan_to_vid(const struct xbundle *out_xbundle, uint16_t vlan) |
9583bc14 | 952 | { |
46c88433 | 953 | switch (out_xbundle->vlan_mode) { |
9583bc14 EJ |
954 | case PORT_VLAN_ACCESS: |
955 | return 0; | |
956 | ||
957 | case PORT_VLAN_TRUNK: | |
958 | case PORT_VLAN_NATIVE_TAGGED: | |
959 | return vlan; | |
960 | ||
961 | case PORT_VLAN_NATIVE_UNTAGGED: | |
46c88433 | 962 | return vlan == out_xbundle->vlan ? 0 : vlan; |
9583bc14 EJ |
963 | |
964 | default: | |
965 | NOT_REACHED(); | |
966 | } | |
967 | } | |
968 | ||
969 | static void | |
46c88433 | 970 | output_normal(struct xlate_ctx *ctx, const struct xbundle *out_xbundle, |
9583bc14 EJ |
971 | uint16_t vlan) |
972 | { | |
33bf9176 | 973 | ovs_be16 *flow_tci = &ctx->xin->flow.vlan_tci; |
9583bc14 EJ |
974 | uint16_t vid; |
975 | ovs_be16 tci, old_tci; | |
46c88433 | 976 | struct xport *xport; |
9583bc14 | 977 | |
46c88433 EJ |
978 | vid = output_vlan_to_vid(out_xbundle, vlan); |
979 | if (list_is_empty(&out_xbundle->xports)) { | |
980 | /* Partially configured bundle with no slaves. Drop the packet. */ | |
981 | return; | |
982 | } else if (!out_xbundle->bond) { | |
983 | xport = CONTAINER_OF(list_front(&out_xbundle->xports), struct xport, | |
984 | bundle_node); | |
9583bc14 | 985 | } else { |
46c88433 EJ |
986 | struct ofport_dpif *ofport; |
987 | ||
988 | ofport = bond_choose_output_slave(out_xbundle->bond, &ctx->xin->flow, | |
4a1b8f30 | 989 | &ctx->xout->wc, vid); |
5e6af486 | 990 | xport = xport_lookup(ofport); |
46c88433 EJ |
991 | |
992 | if (!xport) { | |
9583bc14 EJ |
993 | /* No slaves enabled, so drop packet. */ |
994 | return; | |
995 | } | |
996 | } | |
997 | ||
33bf9176 | 998 | old_tci = *flow_tci; |
9583bc14 | 999 | tci = htons(vid); |
46c88433 | 1000 | if (tci || out_xbundle->use_priority_tags) { |
33bf9176 | 1001 | tci |= *flow_tci & htons(VLAN_PCP_MASK); |
9583bc14 EJ |
1002 | if (tci) { |
1003 | tci |= htons(VLAN_CFI); | |
1004 | } | |
1005 | } | |
33bf9176 | 1006 | *flow_tci = tci; |
9583bc14 | 1007 | |
46c88433 | 1008 | compose_output_action(ctx, xport->ofp_port); |
33bf9176 | 1009 | *flow_tci = old_tci; |
9583bc14 EJ |
1010 | } |
1011 | ||
1012 | /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after | |
1013 | * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to | |
1014 | * indicate this; newer upstream kernels use gratuitous ARP requests. */ | |
1015 | static bool | |
1016 | is_gratuitous_arp(const struct flow *flow, struct flow_wildcards *wc) | |
1017 | { | |
1018 | if (flow->dl_type != htons(ETH_TYPE_ARP)) { | |
1019 | return false; | |
1020 | } | |
1021 | ||
1022 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
1023 | if (!eth_addr_is_broadcast(flow->dl_dst)) { | |
1024 | return false; | |
1025 | } | |
1026 | ||
1027 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
1028 | if (flow->nw_proto == ARP_OP_REPLY) { | |
1029 | return true; | |
1030 | } else if (flow->nw_proto == ARP_OP_REQUEST) { | |
1031 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
1032 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
1033 | ||
1034 | return flow->nw_src == flow->nw_dst; | |
1035 | } else { | |
1036 | return false; | |
1037 | } | |
1038 | } | |
1039 | ||
1040 | static void | |
46c88433 | 1041 | update_learning_table(const struct xbridge *xbridge, |
9583bc14 | 1042 | const struct flow *flow, struct flow_wildcards *wc, |
46c88433 | 1043 | int vlan, struct xbundle *in_xbundle) |
9583bc14 EJ |
1044 | { |
1045 | struct mac_entry *mac; | |
1046 | ||
1047 | /* Don't learn the OFPP_NONE port. */ | |
46c88433 | 1048 | if (in_xbundle == &ofpp_none_bundle) { |
9583bc14 EJ |
1049 | return; |
1050 | } | |
1051 | ||
509c0149 | 1052 | ovs_rwlock_wrlock(&xbridge->ml->rwlock); |
46c88433 | 1053 | if (!mac_learning_may_learn(xbridge->ml, flow->dl_src, vlan)) { |
509c0149 | 1054 | goto out; |
9583bc14 EJ |
1055 | } |
1056 | ||
46c88433 | 1057 | mac = mac_learning_insert(xbridge->ml, flow->dl_src, vlan); |
9583bc14 EJ |
1058 | if (is_gratuitous_arp(flow, wc)) { |
1059 | /* We don't want to learn from gratuitous ARP packets that are | |
1060 | * reflected back over bond slaves so we lock the learning table. */ | |
46c88433 | 1061 | if (!in_xbundle->bond) { |
9583bc14 EJ |
1062 | mac_entry_set_grat_arp_lock(mac); |
1063 | } else if (mac_entry_is_grat_arp_locked(mac)) { | |
509c0149 | 1064 | goto out; |
9583bc14 EJ |
1065 | } |
1066 | } | |
1067 | ||
30618594 | 1068 | if (mac->port.p != in_xbundle->ofbundle) { |
9583bc14 EJ |
1069 | /* The log messages here could actually be useful in debugging, |
1070 | * so keep the rate limit relatively high. */ | |
1071 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300); | |
1072 | VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is " | |
1073 | "on port %s in VLAN %d", | |
46c88433 EJ |
1074 | xbridge->name, ETH_ADDR_ARGS(flow->dl_src), |
1075 | in_xbundle->name, vlan); | |
9583bc14 | 1076 | |
46c88433 | 1077 | mac->port.p = in_xbundle->ofbundle; |
30618594 | 1078 | mac_learning_changed(xbridge->ml); |
9583bc14 | 1079 | } |
509c0149 EJ |
1080 | out: |
1081 | ovs_rwlock_unlock(&xbridge->ml->rwlock); | |
9583bc14 EJ |
1082 | } |
1083 | ||
46c88433 | 1084 | /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or |
9583bc14 EJ |
1085 | * dropped. Returns true if they may be forwarded, false if they should be |
1086 | * dropped. | |
1087 | * | |
46c88433 | 1088 | * 'in_port' must be the xport that corresponds to flow->in_port. |
9583bc14 EJ |
1089 | * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull). |
1090 | * | |
1091 | * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as | |
1092 | * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as | |
1093 | * checked by input_vid_is_valid(). | |
1094 | * | |
1095 | * May also add tags to '*tags', although the current implementation only does | |
1096 | * so in one special case. | |
1097 | */ | |
1098 | static bool | |
46c88433 | 1099 | is_admissible(struct xlate_ctx *ctx, struct xport *in_port, |
9583bc14 EJ |
1100 | uint16_t vlan) |
1101 | { | |
46c88433 EJ |
1102 | struct xbundle *in_xbundle = in_port->xbundle; |
1103 | const struct xbridge *xbridge = ctx->xbridge; | |
9583bc14 | 1104 | struct flow *flow = &ctx->xin->flow; |
9583bc14 EJ |
1105 | |
1106 | /* Drop frames for reserved multicast addresses | |
1107 | * only if forward_bpdu option is absent. */ | |
46c88433 | 1108 | if (!xbridge->forward_bpdu && eth_addr_is_reserved(flow->dl_dst)) { |
9583bc14 EJ |
1109 | xlate_report(ctx, "packet has reserved destination MAC, dropping"); |
1110 | return false; | |
1111 | } | |
1112 | ||
46c88433 | 1113 | if (in_xbundle->bond) { |
9583bc14 EJ |
1114 | struct mac_entry *mac; |
1115 | ||
46c88433 | 1116 | switch (bond_check_admissibility(in_xbundle->bond, in_port->ofport, |
4a1b8f30 | 1117 | flow->dl_dst)) { |
9583bc14 EJ |
1118 | case BV_ACCEPT: |
1119 | break; | |
1120 | ||
1121 | case BV_DROP: | |
1122 | xlate_report(ctx, "bonding refused admissibility, dropping"); | |
1123 | return false; | |
1124 | ||
1125 | case BV_DROP_IF_MOVED: | |
509c0149 | 1126 | ovs_rwlock_rdlock(&xbridge->ml->rwlock); |
30618594 | 1127 | mac = mac_learning_lookup(xbridge->ml, flow->dl_src, vlan); |
46c88433 | 1128 | if (mac && mac->port.p != in_xbundle->ofbundle && |
9583bc14 EJ |
1129 | (!is_gratuitous_arp(flow, &ctx->xout->wc) |
1130 | || mac_entry_is_grat_arp_locked(mac))) { | |
509c0149 | 1131 | ovs_rwlock_unlock(&xbridge->ml->rwlock); |
9583bc14 EJ |
1132 | xlate_report(ctx, "SLB bond thinks this packet looped back, " |
1133 | "dropping"); | |
1134 | return false; | |
1135 | } | |
509c0149 | 1136 | ovs_rwlock_unlock(&xbridge->ml->rwlock); |
9583bc14 EJ |
1137 | break; |
1138 | } | |
1139 | } | |
1140 | ||
1141 | return true; | |
1142 | } | |
1143 | ||
1144 | static void | |
1145 | xlate_normal(struct xlate_ctx *ctx) | |
1146 | { | |
33bf9176 BP |
1147 | struct flow_wildcards *wc = &ctx->xout->wc; |
1148 | struct flow *flow = &ctx->xin->flow; | |
46c88433 EJ |
1149 | struct xbundle *in_xbundle; |
1150 | struct xport *in_port; | |
9583bc14 EJ |
1151 | struct mac_entry *mac; |
1152 | uint16_t vlan; | |
1153 | uint16_t vid; | |
1154 | ||
1155 | ctx->xout->has_normal = true; | |
1156 | ||
33bf9176 BP |
1157 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); |
1158 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
1dd35f8a | 1159 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
9583bc14 | 1160 | |
46c88433 EJ |
1161 | in_xbundle = lookup_input_bundle(ctx->xbridge, flow->in_port.ofp_port, |
1162 | ctx->xin->packet != NULL, &in_port); | |
1163 | if (!in_xbundle) { | |
9583bc14 EJ |
1164 | xlate_report(ctx, "no input bundle, dropping"); |
1165 | return; | |
1166 | } | |
1167 | ||
1168 | /* Drop malformed frames. */ | |
33bf9176 BP |
1169 | if (flow->dl_type == htons(ETH_TYPE_VLAN) && |
1170 | !(flow->vlan_tci & htons(VLAN_CFI))) { | |
9583bc14 EJ |
1171 | if (ctx->xin->packet != NULL) { |
1172 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
1173 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet with partial " | |
1174 | "VLAN tag received on port %s", | |
46c88433 | 1175 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 EJ |
1176 | } |
1177 | xlate_report(ctx, "partial VLAN tag, dropping"); | |
1178 | return; | |
1179 | } | |
1180 | ||
1181 | /* Drop frames on bundles reserved for mirroring. */ | |
46c88433 | 1182 | if (xbundle_mirror_out(ctx->xbridge, in_xbundle)) { |
9583bc14 EJ |
1183 | if (ctx->xin->packet != NULL) { |
1184 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
1185 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port " | |
1186 | "%s, which is reserved exclusively for mirroring", | |
46c88433 | 1187 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 EJ |
1188 | } |
1189 | xlate_report(ctx, "input port is mirror output port, dropping"); | |
1190 | return; | |
1191 | } | |
1192 | ||
1193 | /* Check VLAN. */ | |
33bf9176 | 1194 | vid = vlan_tci_to_vid(flow->vlan_tci); |
46c88433 | 1195 | if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) { |
9583bc14 EJ |
1196 | xlate_report(ctx, "disallowed VLAN VID for this input port, dropping"); |
1197 | return; | |
1198 | } | |
46c88433 | 1199 | vlan = input_vid_to_vlan(in_xbundle, vid); |
9583bc14 EJ |
1200 | |
1201 | /* Check other admissibility requirements. */ | |
1202 | if (in_port && !is_admissible(ctx, in_port, vlan)) { | |
1203 | return; | |
1204 | } | |
1205 | ||
1206 | /* Learn source MAC. */ | |
1207 | if (ctx->xin->may_learn) { | |
46c88433 | 1208 | update_learning_table(ctx->xbridge, flow, wc, vlan, in_xbundle); |
9583bc14 EJ |
1209 | } |
1210 | ||
1211 | /* Determine output bundle. */ | |
509c0149 | 1212 | ovs_rwlock_rdlock(&ctx->xbridge->ml->rwlock); |
30618594 | 1213 | mac = mac_learning_lookup(ctx->xbridge->ml, flow->dl_dst, vlan); |
9583bc14 | 1214 | if (mac) { |
46c88433 EJ |
1215 | struct xbundle *mac_xbundle = xbundle_lookup(mac->port.p); |
1216 | if (mac_xbundle && mac_xbundle != in_xbundle) { | |
9583bc14 | 1217 | xlate_report(ctx, "forwarding to learned port"); |
46c88433 EJ |
1218 | output_normal(ctx, mac_xbundle, vlan); |
1219 | } else if (!mac_xbundle) { | |
1220 | xlate_report(ctx, "learned port is unknown, dropping"); | |
9583bc14 EJ |
1221 | } else { |
1222 | xlate_report(ctx, "learned port is input port, dropping"); | |
1223 | } | |
1224 | } else { | |
46c88433 | 1225 | struct xbundle *xbundle; |
9583bc14 EJ |
1226 | |
1227 | xlate_report(ctx, "no learned MAC for destination, flooding"); | |
46c88433 EJ |
1228 | LIST_FOR_EACH (xbundle, list_node, &ctx->xbridge->xbundles) { |
1229 | if (xbundle != in_xbundle | |
1230 | && xbundle_includes_vlan(xbundle, vlan) | |
1231 | && xbundle->floodable | |
1232 | && !xbundle_mirror_out(ctx->xbridge, xbundle)) { | |
1233 | output_normal(ctx, xbundle, vlan); | |
9583bc14 EJ |
1234 | } |
1235 | } | |
1236 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
1237 | } | |
509c0149 | 1238 | ovs_rwlock_unlock(&ctx->xbridge->ml->rwlock); |
9583bc14 EJ |
1239 | } |
1240 | ||
1241 | /* Compose SAMPLE action for sFlow or IPFIX. The given probability is | |
1242 | * the number of packets out of UINT32_MAX to sample. The given | |
1243 | * cookie is passed back in the callback for each sampled packet. | |
1244 | */ | |
1245 | static size_t | |
46c88433 | 1246 | compose_sample_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1247 | struct ofpbuf *odp_actions, |
1248 | const struct flow *flow, | |
1249 | const uint32_t probability, | |
1250 | const union user_action_cookie *cookie, | |
1251 | const size_t cookie_size) | |
1252 | { | |
1253 | size_t sample_offset, actions_offset; | |
89a8a7f0 | 1254 | odp_port_t odp_port; |
9583bc14 | 1255 | int cookie_offset; |
89a8a7f0 | 1256 | uint32_t pid; |
9583bc14 EJ |
1257 | |
1258 | sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE); | |
1259 | ||
1260 | nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability); | |
1261 | ||
1262 | actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS); | |
89a8a7f0 EJ |
1263 | |
1264 | odp_port = ofp_port_to_odp_port(xbridge, flow->in_port.ofp_port); | |
1265 | pid = dpif_port_get_pid(xbridge->dpif, odp_port); | |
1266 | cookie_offset = odp_put_userspace_action(pid, cookie, cookie_size, odp_actions); | |
9583bc14 EJ |
1267 | |
1268 | nl_msg_end_nested(odp_actions, actions_offset); | |
1269 | nl_msg_end_nested(odp_actions, sample_offset); | |
1270 | return cookie_offset; | |
1271 | } | |
1272 | ||
1273 | static void | |
46c88433 EJ |
1274 | compose_sflow_cookie(const struct xbridge *xbridge, ovs_be16 vlan_tci, |
1275 | odp_port_t odp_port, unsigned int n_outputs, | |
1276 | union user_action_cookie *cookie) | |
9583bc14 EJ |
1277 | { |
1278 | int ifindex; | |
1279 | ||
1280 | cookie->type = USER_ACTION_COOKIE_SFLOW; | |
1281 | cookie->sflow.vlan_tci = vlan_tci; | |
1282 | ||
1283 | /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output | |
1284 | * port information") for the interpretation of cookie->output. */ | |
1285 | switch (n_outputs) { | |
1286 | case 0: | |
1287 | /* 0x40000000 | 256 means "packet dropped for unknown reason". */ | |
1288 | cookie->sflow.output = 0x40000000 | 256; | |
1289 | break; | |
1290 | ||
1291 | case 1: | |
46c88433 | 1292 | ifindex = dpif_sflow_odp_port_to_ifindex(xbridge->sflow, odp_port); |
9583bc14 EJ |
1293 | if (ifindex) { |
1294 | cookie->sflow.output = ifindex; | |
1295 | break; | |
1296 | } | |
1297 | /* Fall through. */ | |
1298 | default: | |
1299 | /* 0x80000000 means "multiple output ports. */ | |
1300 | cookie->sflow.output = 0x80000000 | n_outputs; | |
1301 | break; | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | /* Compose SAMPLE action for sFlow bridge sampling. */ | |
1306 | static size_t | |
46c88433 | 1307 | compose_sflow_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1308 | struct ofpbuf *odp_actions, |
1309 | const struct flow *flow, | |
4e022ec0 | 1310 | odp_port_t odp_port) |
9583bc14 EJ |
1311 | { |
1312 | uint32_t probability; | |
1313 | union user_action_cookie cookie; | |
1314 | ||
46c88433 | 1315 | if (!xbridge->sflow || flow->in_port.ofp_port == OFPP_NONE) { |
9583bc14 EJ |
1316 | return 0; |
1317 | } | |
1318 | ||
46c88433 EJ |
1319 | probability = dpif_sflow_get_probability(xbridge->sflow); |
1320 | compose_sflow_cookie(xbridge, htons(0), odp_port, | |
4e022ec0 | 1321 | odp_port == ODPP_NONE ? 0 : 1, &cookie); |
9583bc14 | 1322 | |
46c88433 | 1323 | return compose_sample_action(xbridge, odp_actions, flow, probability, |
9583bc14 EJ |
1324 | &cookie, sizeof cookie.sflow); |
1325 | } | |
1326 | ||
1327 | static void | |
1328 | compose_flow_sample_cookie(uint16_t probability, uint32_t collector_set_id, | |
1329 | uint32_t obs_domain_id, uint32_t obs_point_id, | |
1330 | union user_action_cookie *cookie) | |
1331 | { | |
1332 | cookie->type = USER_ACTION_COOKIE_FLOW_SAMPLE; | |
1333 | cookie->flow_sample.probability = probability; | |
1334 | cookie->flow_sample.collector_set_id = collector_set_id; | |
1335 | cookie->flow_sample.obs_domain_id = obs_domain_id; | |
1336 | cookie->flow_sample.obs_point_id = obs_point_id; | |
1337 | } | |
1338 | ||
1339 | static void | |
1340 | compose_ipfix_cookie(union user_action_cookie *cookie) | |
1341 | { | |
1342 | cookie->type = USER_ACTION_COOKIE_IPFIX; | |
1343 | } | |
1344 | ||
1345 | /* Compose SAMPLE action for IPFIX bridge sampling. */ | |
1346 | static void | |
46c88433 | 1347 | compose_ipfix_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1348 | struct ofpbuf *odp_actions, |
1349 | const struct flow *flow) | |
1350 | { | |
1351 | uint32_t probability; | |
1352 | union user_action_cookie cookie; | |
1353 | ||
46c88433 | 1354 | if (!xbridge->ipfix || flow->in_port.ofp_port == OFPP_NONE) { |
9583bc14 EJ |
1355 | return; |
1356 | } | |
1357 | ||
46c88433 | 1358 | probability = dpif_ipfix_get_bridge_exporter_probability(xbridge->ipfix); |
9583bc14 EJ |
1359 | compose_ipfix_cookie(&cookie); |
1360 | ||
46c88433 | 1361 | compose_sample_action(xbridge, odp_actions, flow, probability, |
9583bc14 EJ |
1362 | &cookie, sizeof cookie.ipfix); |
1363 | } | |
1364 | ||
1365 | /* SAMPLE action for sFlow must be first action in any given list of | |
1366 | * actions. At this point we do not have all information required to | |
1367 | * build it. So try to build sample action as complete as possible. */ | |
1368 | static void | |
1369 | add_sflow_action(struct xlate_ctx *ctx) | |
1370 | { | |
46c88433 | 1371 | ctx->user_cookie_offset = compose_sflow_action(ctx->xbridge, |
9583bc14 | 1372 | &ctx->xout->odp_actions, |
4e022ec0 | 1373 | &ctx->xin->flow, ODPP_NONE); |
9583bc14 EJ |
1374 | ctx->sflow_odp_port = 0; |
1375 | ctx->sflow_n_outputs = 0; | |
1376 | } | |
1377 | ||
1378 | /* SAMPLE action for IPFIX must be 1st or 2nd action in any given list | |
1379 | * of actions, eventually after the SAMPLE action for sFlow. */ | |
1380 | static void | |
1381 | add_ipfix_action(struct xlate_ctx *ctx) | |
1382 | { | |
46c88433 | 1383 | compose_ipfix_action(ctx->xbridge, &ctx->xout->odp_actions, |
9583bc14 EJ |
1384 | &ctx->xin->flow); |
1385 | } | |
1386 | ||
1387 | /* Fix SAMPLE action according to data collected while composing ODP actions. | |
1388 | * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested | |
1389 | * USERSPACE action's user-cookie which is required for sflow. */ | |
1390 | static void | |
1391 | fix_sflow_action(struct xlate_ctx *ctx) | |
1392 | { | |
1393 | const struct flow *base = &ctx->base_flow; | |
1394 | union user_action_cookie *cookie; | |
1395 | ||
1396 | if (!ctx->user_cookie_offset) { | |
1397 | return; | |
1398 | } | |
1399 | ||
1400 | cookie = ofpbuf_at(&ctx->xout->odp_actions, ctx->user_cookie_offset, | |
1401 | sizeof cookie->sflow); | |
1402 | ovs_assert(cookie->type == USER_ACTION_COOKIE_SFLOW); | |
1403 | ||
46c88433 | 1404 | compose_sflow_cookie(ctx->xbridge, base->vlan_tci, |
9583bc14 EJ |
1405 | ctx->sflow_odp_port, ctx->sflow_n_outputs, cookie); |
1406 | } | |
1407 | ||
db7d4e46 | 1408 | static enum slow_path_reason |
642dc74d | 1409 | process_special(struct xlate_ctx *ctx, const struct flow *flow, |
46c88433 | 1410 | const struct xport *xport, const struct ofpbuf *packet) |
db7d4e46 | 1411 | { |
642dc74d | 1412 | struct flow_wildcards *wc = &ctx->xout->wc; |
46c88433 | 1413 | const struct xbridge *xbridge = ctx->xbridge; |
642dc74d | 1414 | |
46c88433 | 1415 | if (!xport) { |
db7d4e46 | 1416 | return 0; |
46c88433 | 1417 | } else if (xport->cfm && cfm_should_process_flow(xport->cfm, flow, wc)) { |
db7d4e46 | 1418 | if (packet) { |
46c88433 | 1419 | cfm_process_heartbeat(xport->cfm, packet); |
db7d4e46 JP |
1420 | } |
1421 | return SLOW_CFM; | |
fab52e16 | 1422 | } else if (xport->bfd && bfd_should_process_flow(xport->bfd, flow, wc)) { |
db7d4e46 | 1423 | if (packet) { |
46c88433 | 1424 | bfd_process_packet(xport->bfd, flow, packet); |
db7d4e46 JP |
1425 | } |
1426 | return SLOW_BFD; | |
46c88433 | 1427 | } else if (xport->xbundle && xport->xbundle->lacp |
db7d4e46 JP |
1428 | && flow->dl_type == htons(ETH_TYPE_LACP)) { |
1429 | if (packet) { | |
46c88433 | 1430 | lacp_process_packet(xport->xbundle->lacp, xport->ofport, packet); |
db7d4e46 JP |
1431 | } |
1432 | return SLOW_LACP; | |
9d189a50 | 1433 | } else if (xbridge->stp && stp_should_process_flow(flow, wc)) { |
db7d4e46 | 1434 | if (packet) { |
9d189a50 | 1435 | stp_process_packet(xport, packet); |
db7d4e46 JP |
1436 | } |
1437 | return SLOW_STP; | |
1438 | } else { | |
1439 | return 0; | |
1440 | } | |
1441 | } | |
1442 | ||
9583bc14 | 1443 | static void |
4e022ec0 | 1444 | compose_output_action__(struct xlate_ctx *ctx, ofp_port_t ofp_port, |
9583bc14 EJ |
1445 | bool check_stp) |
1446 | { | |
46c88433 | 1447 | const struct xport *xport = get_ofp_port(ctx->xbridge, ofp_port); |
1dd35f8a | 1448 | struct flow_wildcards *wc = &ctx->xout->wc; |
33bf9176 | 1449 | struct flow *flow = &ctx->xin->flow; |
9583bc14 EJ |
1450 | ovs_be16 flow_vlan_tci; |
1451 | uint32_t flow_skb_mark; | |
1452 | uint8_t flow_nw_tos; | |
4e022ec0 | 1453 | odp_port_t out_port, odp_port; |
ca077186 | 1454 | uint8_t dscp; |
9583bc14 EJ |
1455 | |
1456 | /* If 'struct flow' gets additional metadata, we'll need to zero it out | |
1457 | * before traversing a patch port. */ | |
1458 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 20); | |
1459 | ||
46c88433 | 1460 | if (!xport) { |
9583bc14 EJ |
1461 | xlate_report(ctx, "Nonexistent output port"); |
1462 | return; | |
46c88433 | 1463 | } else if (xport->config & OFPUTIL_PC_NO_FWD) { |
9583bc14 EJ |
1464 | xlate_report(ctx, "OFPPC_NO_FWD set, skipping output"); |
1465 | return; | |
9d189a50 | 1466 | } else if (check_stp && !xport_stp_forward_state(xport)) { |
9583bc14 EJ |
1467 | xlate_report(ctx, "STP not in forwarding state, skipping output"); |
1468 | return; | |
1469 | } | |
1470 | ||
46c88433 EJ |
1471 | if (mbridge_has_mirrors(ctx->xbridge->mbridge) && xport->xbundle) { |
1472 | ctx->xout->mirrors |= xbundle_mirror_dst(xport->xbundle->xbridge, | |
1473 | xport->xbundle); | |
cdf5d3a5 EJ |
1474 | } |
1475 | ||
46c88433 EJ |
1476 | if (xport->peer) { |
1477 | const struct xport *peer = xport->peer; | |
9583bc14 | 1478 | struct flow old_flow = ctx->xin->flow; |
9583bc14 | 1479 | enum slow_path_reason special; |
9583bc14 | 1480 | |
46c88433 EJ |
1481 | ctx->xbridge = peer->xbridge; |
1482 | flow->in_port.ofp_port = peer->ofp_port; | |
33bf9176 BP |
1483 | flow->metadata = htonll(0); |
1484 | memset(&flow->tunnel, 0, sizeof flow->tunnel); | |
1485 | memset(flow->regs, 0, sizeof flow->regs); | |
9583bc14 | 1486 | |
642dc74d | 1487 | special = process_special(ctx, &ctx->xin->flow, peer, |
9583bc14 EJ |
1488 | ctx->xin->packet); |
1489 | if (special) { | |
1490 | ctx->xout->slow = special; | |
ddd3c975 | 1491 | } else if (may_receive(peer, ctx)) { |
9d189a50 | 1492 | if (xport_stp_forward_state(peer)) { |
4e022ec0 | 1493 | xlate_table_action(ctx, flow->in_port.ofp_port, 0, true); |
9583bc14 EJ |
1494 | } else { |
1495 | /* Forwarding is disabled by STP. Let OFPP_NORMAL and the | |
1496 | * learning action look at the packet, then drop it. */ | |
1497 | struct flow old_base_flow = ctx->base_flow; | |
1498 | size_t old_size = ctx->xout->odp_actions.size; | |
cdf5d3a5 | 1499 | mirror_mask_t old_mirrors = ctx->xout->mirrors; |
4e022ec0 | 1500 | xlate_table_action(ctx, flow->in_port.ofp_port, 0, true); |
cdf5d3a5 | 1501 | ctx->xout->mirrors = old_mirrors; |
9583bc14 EJ |
1502 | ctx->base_flow = old_base_flow; |
1503 | ctx->xout->odp_actions.size = old_size; | |
1504 | } | |
1505 | } | |
1506 | ||
1507 | ctx->xin->flow = old_flow; | |
832554e3 | 1508 | ctx->xbridge = xport->xbridge; |
9583bc14 EJ |
1509 | |
1510 | if (ctx->xin->resubmit_stats) { | |
46c88433 EJ |
1511 | netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats); |
1512 | netdev_vport_inc_rx(peer->netdev, ctx->xin->resubmit_stats); | |
9583bc14 EJ |
1513 | } |
1514 | ||
1515 | return; | |
1516 | } | |
1517 | ||
33bf9176 BP |
1518 | flow_vlan_tci = flow->vlan_tci; |
1519 | flow_skb_mark = flow->skb_mark; | |
1520 | flow_nw_tos = flow->nw_tos; | |
9583bc14 | 1521 | |
55954f6e | 1522 | if (dscp_from_skb_priority(xport, flow->skb_priority, &dscp)) { |
1dd35f8a | 1523 | wc->masks.nw_tos |= IP_ECN_MASK; |
33bf9176 | 1524 | flow->nw_tos &= ~IP_DSCP_MASK; |
ca077186 | 1525 | flow->nw_tos |= dscp; |
9583bc14 EJ |
1526 | } |
1527 | ||
46c88433 | 1528 | if (xport->is_tunnel) { |
9583bc14 EJ |
1529 | /* Save tunnel metadata so that changes made due to |
1530 | * the Logical (tunnel) Port are not visible for any further | |
1531 | * matches, while explicit set actions on tunnel metadata are. | |
1532 | */ | |
33bf9176 | 1533 | struct flow_tnl flow_tnl = flow->tunnel; |
46c88433 | 1534 | odp_port = tnl_port_send(xport->ofport, flow, &ctx->xout->wc); |
4e022ec0 | 1535 | if (odp_port == ODPP_NONE) { |
9583bc14 EJ |
1536 | xlate_report(ctx, "Tunneling decided against output"); |
1537 | goto out; /* restore flow_nw_tos */ | |
1538 | } | |
33bf9176 | 1539 | if (flow->tunnel.ip_dst == ctx->orig_tunnel_ip_dst) { |
9583bc14 EJ |
1540 | xlate_report(ctx, "Not tunneling to our own address"); |
1541 | goto out; /* restore flow_nw_tos */ | |
1542 | } | |
1543 | if (ctx->xin->resubmit_stats) { | |
46c88433 | 1544 | netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats); |
9583bc14 EJ |
1545 | } |
1546 | out_port = odp_port; | |
33bf9176 | 1547 | commit_odp_tunnel_action(flow, &ctx->base_flow, |
9583bc14 | 1548 | &ctx->xout->odp_actions); |
33bf9176 | 1549 | flow->tunnel = flow_tnl; /* Restore tunnel metadata */ |
9583bc14 | 1550 | } else { |
4e022ec0 | 1551 | ofp_port_t vlandev_port; |
1dd35f8a | 1552 | |
46c88433 EJ |
1553 | odp_port = xport->odp_port; |
1554 | if (ofproto_has_vlan_splinters(ctx->xbridge->ofproto)) { | |
1dd35f8a JP |
1555 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
1556 | } | |
46c88433 | 1557 | vlandev_port = vsp_realdev_to_vlandev(ctx->xbridge->ofproto, ofp_port, |
33bf9176 | 1558 | flow->vlan_tci); |
9583bc14 EJ |
1559 | if (vlandev_port == ofp_port) { |
1560 | out_port = odp_port; | |
1561 | } else { | |
46c88433 | 1562 | out_port = ofp_port_to_odp_port(ctx->xbridge, vlandev_port); |
33bf9176 | 1563 | flow->vlan_tci = htons(0); |
9583bc14 | 1564 | } |
33bf9176 | 1565 | flow->skb_mark &= ~IPSEC_MARK; |
9583bc14 | 1566 | } |
9583bc14 | 1567 | |
4e022ec0 | 1568 | if (out_port != ODPP_NONE) { |
1dd35f8a JP |
1569 | commit_odp_actions(flow, &ctx->base_flow, |
1570 | &ctx->xout->odp_actions, &ctx->xout->wc); | |
4e022ec0 AW |
1571 | nl_msg_put_odp_port(&ctx->xout->odp_actions, OVS_ACTION_ATTR_OUTPUT, |
1572 | out_port); | |
9583bc14 | 1573 | |
6cbbf4fa EJ |
1574 | ctx->sflow_odp_port = odp_port; |
1575 | ctx->sflow_n_outputs++; | |
1576 | ctx->xout->nf_output_iface = ofp_port; | |
1577 | } | |
1578 | ||
1579 | out: | |
9583bc14 | 1580 | /* Restore flow */ |
33bf9176 BP |
1581 | flow->vlan_tci = flow_vlan_tci; |
1582 | flow->skb_mark = flow_skb_mark; | |
33bf9176 | 1583 | flow->nw_tos = flow_nw_tos; |
9583bc14 EJ |
1584 | } |
1585 | ||
1586 | static void | |
4e022ec0 | 1587 | compose_output_action(struct xlate_ctx *ctx, ofp_port_t ofp_port) |
9583bc14 EJ |
1588 | { |
1589 | compose_output_action__(ctx, ofp_port, true); | |
1590 | } | |
1591 | ||
9583bc14 EJ |
1592 | /* Common rule processing in one place to avoid duplicating code. */ |
1593 | static struct rule_dpif * | |
1594 | ctx_rule_hooks(struct xlate_ctx *ctx, struct rule_dpif *rule, | |
1595 | bool may_packet_in) | |
1596 | { | |
1597 | if (ctx->xin->resubmit_hook) { | |
4d0acc70 | 1598 | ctx->xin->resubmit_hook(ctx->xin, rule, ctx->recurse); |
9583bc14 EJ |
1599 | } |
1600 | if (rule == NULL && may_packet_in) { | |
ec89fc6f EJ |
1601 | struct xport *xport; |
1602 | ||
9583bc14 EJ |
1603 | /* XXX |
1604 | * check if table configuration flags | |
1605 | * OFPTC_TABLE_MISS_CONTROLLER, default. | |
1606 | * OFPTC_TABLE_MISS_CONTINUE, | |
1607 | * OFPTC_TABLE_MISS_DROP | |
ec89fc6f EJ |
1608 | * When OF1.0, OFPTC_TABLE_MISS_CONTINUE is used. What to do? */ |
1609 | xport = get_ofp_port(ctx->xbridge, ctx->xin->flow.in_port.ofp_port); | |
1610 | rule = choose_miss_rule(xport ? xport->config : 0, | |
1611 | ctx->xbridge->miss_rule, | |
1612 | ctx->xbridge->no_packet_in_rule); | |
9583bc14 EJ |
1613 | } |
1614 | if (rule && ctx->xin->resubmit_stats) { | |
1615 | rule_credit_stats(rule, ctx->xin->resubmit_stats); | |
1616 | } | |
1617 | return rule; | |
1618 | } | |
1619 | ||
1620 | static void | |
1621 | xlate_table_action(struct xlate_ctx *ctx, | |
4e022ec0 | 1622 | ofp_port_t in_port, uint8_t table_id, bool may_packet_in) |
9583bc14 EJ |
1623 | { |
1624 | if (ctx->recurse < MAX_RESUBMIT_RECURSION) { | |
1625 | struct rule_dpif *rule; | |
4e022ec0 | 1626 | ofp_port_t old_in_port = ctx->xin->flow.in_port.ofp_port; |
9583bc14 EJ |
1627 | uint8_t old_table_id = ctx->table_id; |
1628 | ||
1629 | ctx->table_id = table_id; | |
1630 | ||
1631 | /* Look up a flow with 'in_port' as the input port. */ | |
4e022ec0 | 1632 | ctx->xin->flow.in_port.ofp_port = in_port; |
46c88433 EJ |
1633 | rule = rule_dpif_lookup_in_table(ctx->xbridge->ofproto, |
1634 | &ctx->xin->flow, &ctx->xout->wc, | |
1635 | table_id); | |
9583bc14 | 1636 | |
9583bc14 EJ |
1637 | /* Restore the original input port. Otherwise OFPP_NORMAL and |
1638 | * OFPP_IN_PORT will have surprising behavior. */ | |
4e022ec0 | 1639 | ctx->xin->flow.in_port.ofp_port = old_in_port; |
9583bc14 EJ |
1640 | |
1641 | rule = ctx_rule_hooks(ctx, rule, may_packet_in); | |
1642 | ||
1643 | if (rule) { | |
1644 | struct rule_dpif *old_rule = ctx->rule; | |
1645 | ||
1646 | ctx->recurse++; | |
1647 | ctx->rule = rule; | |
1648 | do_xlate_actions(rule->up.ofpacts, rule->up.ofpacts_len, ctx); | |
1649 | ctx->rule = old_rule; | |
1650 | ctx->recurse--; | |
1651 | } | |
1652 | ||
1653 | ctx->table_id = old_table_id; | |
1654 | } else { | |
1655 | static struct vlog_rate_limit recurse_rl = VLOG_RATE_LIMIT_INIT(1, 1); | |
1656 | ||
1657 | VLOG_ERR_RL(&recurse_rl, "resubmit actions recursed over %d times", | |
1658 | MAX_RESUBMIT_RECURSION); | |
9583bc14 EJ |
1659 | } |
1660 | } | |
1661 | ||
1662 | static void | |
1663 | xlate_ofpact_resubmit(struct xlate_ctx *ctx, | |
1664 | const struct ofpact_resubmit *resubmit) | |
1665 | { | |
4e022ec0 | 1666 | ofp_port_t in_port; |
9583bc14 EJ |
1667 | uint8_t table_id; |
1668 | ||
1669 | in_port = resubmit->in_port; | |
1670 | if (in_port == OFPP_IN_PORT) { | |
4e022ec0 | 1671 | in_port = ctx->xin->flow.in_port.ofp_port; |
9583bc14 EJ |
1672 | } |
1673 | ||
1674 | table_id = resubmit->table_id; | |
1675 | if (table_id == 255) { | |
1676 | table_id = ctx->table_id; | |
1677 | } | |
1678 | ||
1679 | xlate_table_action(ctx, in_port, table_id, false); | |
1680 | } | |
1681 | ||
1682 | static void | |
1683 | flood_packets(struct xlate_ctx *ctx, bool all) | |
1684 | { | |
46c88433 | 1685 | const struct xport *xport; |
9583bc14 | 1686 | |
46c88433 EJ |
1687 | HMAP_FOR_EACH (xport, ofp_node, &ctx->xbridge->xports) { |
1688 | if (xport->ofp_port == ctx->xin->flow.in_port.ofp_port) { | |
9583bc14 EJ |
1689 | continue; |
1690 | } | |
1691 | ||
1692 | if (all) { | |
46c88433 EJ |
1693 | compose_output_action__(ctx, xport->ofp_port, false); |
1694 | } else if (!(xport->config & OFPUTIL_PC_NO_FLOOD)) { | |
1695 | compose_output_action(ctx, xport->ofp_port); | |
9583bc14 EJ |
1696 | } |
1697 | } | |
1698 | ||
1699 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
1700 | } | |
1701 | ||
1702 | static void | |
1703 | execute_controller_action(struct xlate_ctx *ctx, int len, | |
1704 | enum ofp_packet_in_reason reason, | |
1705 | uint16_t controller_id) | |
1706 | { | |
ada3a58d | 1707 | struct ofputil_packet_in *pin; |
9583bc14 EJ |
1708 | struct ofpbuf *packet; |
1709 | struct flow key; | |
1710 | ||
1711 | ovs_assert(!ctx->xout->slow || ctx->xout->slow == SLOW_CONTROLLER); | |
1712 | ctx->xout->slow = SLOW_CONTROLLER; | |
1713 | if (!ctx->xin->packet) { | |
1714 | return; | |
1715 | } | |
1716 | ||
1717 | packet = ofpbuf_clone(ctx->xin->packet); | |
1718 | ||
1719 | key.skb_priority = 0; | |
1720 | key.skb_mark = 0; | |
1721 | memset(&key.tunnel, 0, sizeof key.tunnel); | |
1722 | ||
1723 | commit_odp_actions(&ctx->xin->flow, &ctx->base_flow, | |
1dd35f8a | 1724 | &ctx->xout->odp_actions, &ctx->xout->wc); |
9583bc14 EJ |
1725 | |
1726 | odp_execute_actions(NULL, packet, &key, ctx->xout->odp_actions.data, | |
1727 | ctx->xout->odp_actions.size, NULL, NULL); | |
1728 | ||
ada3a58d EJ |
1729 | pin = xmalloc(sizeof *pin); |
1730 | pin->packet_len = packet->size; | |
1731 | pin->packet = ofpbuf_steal_data(packet); | |
1732 | pin->reason = reason; | |
1733 | pin->controller_id = controller_id; | |
1734 | pin->table_id = ctx->table_id; | |
1735 | pin->cookie = ctx->rule ? ctx->rule->up.flow_cookie : 0; | |
9583bc14 | 1736 | |
ada3a58d EJ |
1737 | pin->send_len = len; |
1738 | flow_get_metadata(&ctx->xin->flow, &pin->fmd); | |
9583bc14 | 1739 | |
ada3a58d | 1740 | ofproto_dpif_send_packet_in(ctx->xbridge->ofproto, pin); |
9583bc14 EJ |
1741 | ofpbuf_delete(packet); |
1742 | } | |
1743 | ||
1744 | static void | |
9cfef3d0 | 1745 | compose_mpls_push_action(struct xlate_ctx *ctx, ovs_be16 eth_type) |
9583bc14 | 1746 | { |
33bf9176 BP |
1747 | struct flow_wildcards *wc = &ctx->xout->wc; |
1748 | struct flow *flow = &ctx->xin->flow; | |
1749 | ||
9583bc14 EJ |
1750 | ovs_assert(eth_type_mpls(eth_type)); |
1751 | ||
33bf9176 BP |
1752 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
1753 | memset(&wc->masks.mpls_depth, 0xff, sizeof wc->masks.mpls_depth); | |
9583bc14 | 1754 | |
33bf9176 BP |
1755 | if (flow->mpls_depth) { |
1756 | flow->mpls_lse &= ~htonl(MPLS_BOS_MASK); | |
1757 | flow->mpls_depth++; | |
9583bc14 EJ |
1758 | } else { |
1759 | ovs_be32 label; | |
1760 | uint8_t tc, ttl; | |
1761 | ||
33bf9176 | 1762 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
9583bc14 EJ |
1763 | label = htonl(0x2); /* IPV6 Explicit Null. */ |
1764 | } else { | |
1765 | label = htonl(0x0); /* IPV4 Explicit Null. */ | |
1766 | } | |
1dd35f8a JP |
1767 | wc->masks.nw_tos |= IP_DSCP_MASK; |
1768 | wc->masks.nw_ttl = 0xff; | |
33bf9176 BP |
1769 | tc = (flow->nw_tos & IP_DSCP_MASK) >> 2; |
1770 | ttl = flow->nw_ttl ? flow->nw_ttl : 0x40; | |
1771 | flow->mpls_lse = set_mpls_lse_values(ttl, tc, 1, label); | |
1772 | flow->mpls_depth = 1; | |
9583bc14 | 1773 | } |
33bf9176 | 1774 | flow->dl_type = eth_type; |
9583bc14 EJ |
1775 | } |
1776 | ||
1777 | static void | |
9cfef3d0 | 1778 | compose_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type) |
9583bc14 | 1779 | { |
33bf9176 BP |
1780 | struct flow_wildcards *wc = &ctx->xout->wc; |
1781 | struct flow *flow = &ctx->xin->flow; | |
1782 | ||
9583bc14 EJ |
1783 | ovs_assert(eth_type_mpls(ctx->xin->flow.dl_type)); |
1784 | ovs_assert(!eth_type_mpls(eth_type)); | |
1785 | ||
33bf9176 BP |
1786 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
1787 | memset(&wc->masks.mpls_depth, 0xff, sizeof wc->masks.mpls_depth); | |
1788 | ||
1789 | if (flow->mpls_depth) { | |
1790 | flow->mpls_depth--; | |
1791 | flow->mpls_lse = htonl(0); | |
1792 | if (!flow->mpls_depth) { | |
1793 | flow->dl_type = eth_type; | |
9583bc14 EJ |
1794 | } |
1795 | } | |
1796 | } | |
1797 | ||
1798 | static bool | |
1799 | compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids) | |
1800 | { | |
33bf9176 BP |
1801 | struct flow *flow = &ctx->xin->flow; |
1802 | ||
1803 | if (!is_ip_any(flow)) { | |
9583bc14 EJ |
1804 | return false; |
1805 | } | |
1806 | ||
1dd35f8a | 1807 | ctx->xout->wc.masks.nw_ttl = 0xff; |
33bf9176 BP |
1808 | if (flow->nw_ttl > 1) { |
1809 | flow->nw_ttl--; | |
9583bc14 EJ |
1810 | return false; |
1811 | } else { | |
1812 | size_t i; | |
1813 | ||
1814 | for (i = 0; i < ids->n_controllers; i++) { | |
1815 | execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, | |
1816 | ids->cnt_ids[i]); | |
1817 | } | |
1818 | ||
1819 | /* Stop processing for current table. */ | |
1820 | return true; | |
1821 | } | |
1822 | } | |
1823 | ||
1824 | static bool | |
9cfef3d0 | 1825 | compose_set_mpls_ttl_action(struct xlate_ctx *ctx, uint8_t ttl) |
9583bc14 EJ |
1826 | { |
1827 | if (!eth_type_mpls(ctx->xin->flow.dl_type)) { | |
1828 | return true; | |
1829 | } | |
1830 | ||
f74e7df7 | 1831 | ctx->xout->wc.masks.mpls_lse |= htonl(MPLS_TTL_MASK); |
9583bc14 EJ |
1832 | set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse, ttl); |
1833 | return false; | |
1834 | } | |
1835 | ||
1836 | static bool | |
9cfef3d0 | 1837 | compose_dec_mpls_ttl_action(struct xlate_ctx *ctx) |
9583bc14 | 1838 | { |
33bf9176 BP |
1839 | struct flow *flow = &ctx->xin->flow; |
1840 | uint8_t ttl = mpls_lse_to_ttl(flow->mpls_lse); | |
1dd35f8a JP |
1841 | struct flow_wildcards *wc = &ctx->xout->wc; |
1842 | ||
1dd35f8a | 1843 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
9583bc14 | 1844 | |
33bf9176 | 1845 | if (!eth_type_mpls(flow->dl_type)) { |
9583bc14 EJ |
1846 | return false; |
1847 | } | |
1848 | ||
1849 | if (ttl > 1) { | |
1850 | ttl--; | |
33bf9176 | 1851 | set_mpls_lse_ttl(&flow->mpls_lse, ttl); |
9583bc14 EJ |
1852 | return false; |
1853 | } else { | |
1854 | execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, 0); | |
1855 | ||
1856 | /* Stop processing for current table. */ | |
1857 | return true; | |
1858 | } | |
1859 | } | |
1860 | ||
1861 | static void | |
1862 | xlate_output_action(struct xlate_ctx *ctx, | |
4e022ec0 | 1863 | ofp_port_t port, uint16_t max_len, bool may_packet_in) |
9583bc14 | 1864 | { |
4e022ec0 | 1865 | ofp_port_t prev_nf_output_iface = ctx->xout->nf_output_iface; |
9583bc14 EJ |
1866 | |
1867 | ctx->xout->nf_output_iface = NF_OUT_DROP; | |
1868 | ||
1869 | switch (port) { | |
1870 | case OFPP_IN_PORT: | |
4e022ec0 | 1871 | compose_output_action(ctx, ctx->xin->flow.in_port.ofp_port); |
9583bc14 EJ |
1872 | break; |
1873 | case OFPP_TABLE: | |
4e022ec0 AW |
1874 | xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port, |
1875 | 0, may_packet_in); | |
9583bc14 EJ |
1876 | break; |
1877 | case OFPP_NORMAL: | |
1878 | xlate_normal(ctx); | |
1879 | break; | |
1880 | case OFPP_FLOOD: | |
1881 | flood_packets(ctx, false); | |
1882 | break; | |
1883 | case OFPP_ALL: | |
1884 | flood_packets(ctx, true); | |
1885 | break; | |
1886 | case OFPP_CONTROLLER: | |
1887 | execute_controller_action(ctx, max_len, OFPR_ACTION, 0); | |
1888 | break; | |
1889 | case OFPP_NONE: | |
1890 | break; | |
1891 | case OFPP_LOCAL: | |
1892 | default: | |
4e022ec0 | 1893 | if (port != ctx->xin->flow.in_port.ofp_port) { |
9583bc14 EJ |
1894 | compose_output_action(ctx, port); |
1895 | } else { | |
1896 | xlate_report(ctx, "skipping output to input port"); | |
1897 | } | |
1898 | break; | |
1899 | } | |
1900 | ||
1901 | if (prev_nf_output_iface == NF_OUT_FLOOD) { | |
1902 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
1903 | } else if (ctx->xout->nf_output_iface == NF_OUT_DROP) { | |
1904 | ctx->xout->nf_output_iface = prev_nf_output_iface; | |
1905 | } else if (prev_nf_output_iface != NF_OUT_DROP && | |
1906 | ctx->xout->nf_output_iface != NF_OUT_FLOOD) { | |
1907 | ctx->xout->nf_output_iface = NF_OUT_MULTI; | |
1908 | } | |
1909 | } | |
1910 | ||
1911 | static void | |
1912 | xlate_output_reg_action(struct xlate_ctx *ctx, | |
1913 | const struct ofpact_output_reg *or) | |
1914 | { | |
1915 | uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow); | |
1916 | if (port <= UINT16_MAX) { | |
1917 | union mf_subvalue value; | |
1918 | ||
1919 | memset(&value, 0xff, sizeof value); | |
1920 | mf_write_subfield_flow(&or->src, &value, &ctx->xout->wc.masks); | |
4e022ec0 AW |
1921 | xlate_output_action(ctx, u16_to_ofp(port), |
1922 | or->max_len, false); | |
9583bc14 EJ |
1923 | } |
1924 | } | |
1925 | ||
1926 | static void | |
1927 | xlate_enqueue_action(struct xlate_ctx *ctx, | |
1928 | const struct ofpact_enqueue *enqueue) | |
1929 | { | |
4e022ec0 | 1930 | ofp_port_t ofp_port = enqueue->port; |
9583bc14 EJ |
1931 | uint32_t queue_id = enqueue->queue; |
1932 | uint32_t flow_priority, priority; | |
1933 | int error; | |
1934 | ||
1935 | /* Translate queue to priority. */ | |
89a8a7f0 | 1936 | error = dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &priority); |
9583bc14 EJ |
1937 | if (error) { |
1938 | /* Fall back to ordinary output action. */ | |
1939 | xlate_output_action(ctx, enqueue->port, 0, false); | |
1940 | return; | |
1941 | } | |
1942 | ||
1943 | /* Check output port. */ | |
1944 | if (ofp_port == OFPP_IN_PORT) { | |
4e022ec0 AW |
1945 | ofp_port = ctx->xin->flow.in_port.ofp_port; |
1946 | } else if (ofp_port == ctx->xin->flow.in_port.ofp_port) { | |
9583bc14 EJ |
1947 | return; |
1948 | } | |
1949 | ||
1950 | /* Add datapath actions. */ | |
1951 | flow_priority = ctx->xin->flow.skb_priority; | |
1952 | ctx->xin->flow.skb_priority = priority; | |
1953 | compose_output_action(ctx, ofp_port); | |
1954 | ctx->xin->flow.skb_priority = flow_priority; | |
1955 | ||
1956 | /* Update NetFlow output port. */ | |
1957 | if (ctx->xout->nf_output_iface == NF_OUT_DROP) { | |
1958 | ctx->xout->nf_output_iface = ofp_port; | |
1959 | } else if (ctx->xout->nf_output_iface != NF_OUT_FLOOD) { | |
1960 | ctx->xout->nf_output_iface = NF_OUT_MULTI; | |
1961 | } | |
1962 | } | |
1963 | ||
1964 | static void | |
1965 | xlate_set_queue_action(struct xlate_ctx *ctx, uint32_t queue_id) | |
1966 | { | |
1967 | uint32_t skb_priority; | |
1968 | ||
89a8a7f0 | 1969 | if (!dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &skb_priority)) { |
9583bc14 EJ |
1970 | ctx->xin->flow.skb_priority = skb_priority; |
1971 | } else { | |
1972 | /* Couldn't translate queue to a priority. Nothing to do. A warning | |
1973 | * has already been logged. */ | |
1974 | } | |
1975 | } | |
1976 | ||
1977 | static bool | |
46c88433 | 1978 | slave_enabled_cb(ofp_port_t ofp_port, void *xbridge_) |
9583bc14 | 1979 | { |
46c88433 EJ |
1980 | const struct xbridge *xbridge = xbridge_; |
1981 | struct xport *port; | |
9583bc14 EJ |
1982 | |
1983 | switch (ofp_port) { | |
1984 | case OFPP_IN_PORT: | |
1985 | case OFPP_TABLE: | |
1986 | case OFPP_NORMAL: | |
1987 | case OFPP_FLOOD: | |
1988 | case OFPP_ALL: | |
1989 | case OFPP_NONE: | |
1990 | return true; | |
1991 | case OFPP_CONTROLLER: /* Not supported by the bundle action. */ | |
1992 | return false; | |
1993 | default: | |
46c88433 | 1994 | port = get_ofp_port(xbridge, ofp_port); |
9583bc14 EJ |
1995 | return port ? port->may_enable : false; |
1996 | } | |
1997 | } | |
1998 | ||
1999 | static void | |
2000 | xlate_bundle_action(struct xlate_ctx *ctx, | |
2001 | const struct ofpact_bundle *bundle) | |
2002 | { | |
4e022ec0 | 2003 | ofp_port_t port; |
9583bc14 EJ |
2004 | |
2005 | port = bundle_execute(bundle, &ctx->xin->flow, &ctx->xout->wc, | |
46c88433 EJ |
2006 | slave_enabled_cb, |
2007 | CONST_CAST(struct xbridge *, ctx->xbridge)); | |
9583bc14 | 2008 | if (bundle->dst.field) { |
f74e7df7 JP |
2009 | nxm_reg_load(&bundle->dst, ofp_to_u16(port), &ctx->xin->flow, |
2010 | &ctx->xout->wc); | |
9583bc14 EJ |
2011 | } else { |
2012 | xlate_output_action(ctx, port, 0, false); | |
2013 | } | |
2014 | } | |
2015 | ||
2016 | static void | |
2017 | xlate_learn_action(struct xlate_ctx *ctx, | |
2018 | const struct ofpact_learn *learn) | |
2019 | { | |
3d9c5e58 | 2020 | struct ofputil_flow_mod *fm; |
9583bc14 | 2021 | struct ofpbuf ofpacts; |
9583bc14 EJ |
2022 | |
2023 | ctx->xout->has_learn = true; | |
2024 | ||
2025 | learn_mask(learn, &ctx->xout->wc); | |
2026 | ||
2027 | if (!ctx->xin->may_learn) { | |
2028 | return; | |
2029 | } | |
2030 | ||
3d9c5e58 EJ |
2031 | fm = xmalloc(sizeof *fm); |
2032 | ofpbuf_init(&ofpacts, 0); | |
2033 | learn_execute(learn, &ctx->xin->flow, fm, &ofpacts); | |
9583bc14 | 2034 | |
3d9c5e58 | 2035 | ofproto_dpif_flow_mod(ctx->xbridge->ofproto, fm); |
9583bc14 EJ |
2036 | } |
2037 | ||
2038 | /* Reduces '*timeout' to no more than 'max'. A value of zero in either case | |
2039 | * means "infinite". */ | |
2040 | static void | |
2041 | reduce_timeout(uint16_t max, uint16_t *timeout) | |
2042 | { | |
2043 | if (max && (!*timeout || *timeout > max)) { | |
2044 | *timeout = max; | |
2045 | } | |
2046 | } | |
2047 | ||
2048 | static void | |
2049 | xlate_fin_timeout(struct xlate_ctx *ctx, | |
2050 | const struct ofpact_fin_timeout *oft) | |
2051 | { | |
2052 | if (ctx->xin->tcp_flags & (TCP_FIN | TCP_RST) && ctx->rule) { | |
2053 | struct rule_dpif *rule = ctx->rule; | |
2054 | ||
83b16b98 EJ |
2055 | ovs_mutex_lock(&rule->up.ofproto->expirable_mutex); |
2056 | if (list_is_empty(&rule->up.expirable)) { | |
2057 | list_insert(&rule->up.ofproto->expirable, &rule->up.expirable); | |
2058 | } | |
2059 | ovs_mutex_unlock(&rule->up.ofproto->expirable_mutex); | |
2060 | ||
2061 | ovs_mutex_lock(&rule->up.timeout_mutex); | |
2062 | reduce_timeout(oft->fin_idle_timeout, &rule->up.idle_timeout); | |
2063 | reduce_timeout(oft->fin_hard_timeout, &rule->up.hard_timeout); | |
2064 | ovs_mutex_unlock(&rule->up.timeout_mutex); | |
9583bc14 EJ |
2065 | } |
2066 | } | |
2067 | ||
2068 | static void | |
2069 | xlate_sample_action(struct xlate_ctx *ctx, | |
2070 | const struct ofpact_sample *os) | |
2071 | { | |
2072 | union user_action_cookie cookie; | |
2073 | /* Scale the probability from 16-bit to 32-bit while representing | |
2074 | * the same percentage. */ | |
2075 | uint32_t probability = (os->probability << 16) | os->probability; | |
2076 | ||
2077 | commit_odp_actions(&ctx->xin->flow, &ctx->base_flow, | |
1dd35f8a | 2078 | &ctx->xout->odp_actions, &ctx->xout->wc); |
9583bc14 EJ |
2079 | |
2080 | compose_flow_sample_cookie(os->probability, os->collector_set_id, | |
2081 | os->obs_domain_id, os->obs_point_id, &cookie); | |
46c88433 | 2082 | compose_sample_action(ctx->xbridge, &ctx->xout->odp_actions, &ctx->xin->flow, |
9583bc14 EJ |
2083 | probability, &cookie, sizeof cookie.flow_sample); |
2084 | } | |
2085 | ||
2086 | static bool | |
46c88433 | 2087 | may_receive(const struct xport *xport, struct xlate_ctx *ctx) |
9583bc14 | 2088 | { |
46c88433 EJ |
2089 | if (xport->config & (eth_addr_equals(ctx->xin->flow.dl_dst, eth_addr_stp) |
2090 | ? OFPUTIL_PC_NO_RECV_STP | |
2091 | : OFPUTIL_PC_NO_RECV)) { | |
9583bc14 EJ |
2092 | return false; |
2093 | } | |
2094 | ||
2095 | /* Only drop packets here if both forwarding and learning are | |
2096 | * disabled. If just learning is enabled, we need to have | |
2097 | * OFPP_NORMAL and the learning action have a look at the packet | |
2098 | * before we can drop it. */ | |
9d189a50 | 2099 | if (!xport_stp_forward_state(xport) && !xport_stp_learn_state(xport)) { |
9583bc14 EJ |
2100 | return false; |
2101 | } | |
2102 | ||
2103 | return true; | |
2104 | } | |
2105 | ||
2106 | static bool | |
2107 | tunnel_ecn_ok(struct xlate_ctx *ctx) | |
2108 | { | |
2109 | if (is_ip_any(&ctx->base_flow) | |
2110 | && (ctx->xin->flow.tunnel.ip_tos & IP_ECN_MASK) == IP_ECN_CE) { | |
2111 | if ((ctx->base_flow.nw_tos & IP_ECN_MASK) == IP_ECN_NOT_ECT) { | |
2112 | VLOG_WARN_RL(&rl, "dropping tunnel packet marked ECN CE" | |
2113 | " but is not ECN capable"); | |
2114 | return false; | |
2115 | } else { | |
2116 | /* Set the ECN CE value in the tunneled packet. */ | |
2117 | ctx->xin->flow.nw_tos |= IP_ECN_CE; | |
2118 | } | |
2119 | } | |
2120 | ||
2121 | return true; | |
2122 | } | |
2123 | ||
2124 | static void | |
2125 | do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len, | |
2126 | struct xlate_ctx *ctx) | |
2127 | { | |
33bf9176 BP |
2128 | struct flow_wildcards *wc = &ctx->xout->wc; |
2129 | struct flow *flow = &ctx->xin->flow; | |
9583bc14 EJ |
2130 | bool was_evictable = true; |
2131 | const struct ofpact *a; | |
2132 | ||
2133 | if (ctx->rule) { | |
2134 | /* Don't let the rule we're working on get evicted underneath us. */ | |
2135 | was_evictable = ctx->rule->up.evictable; | |
2136 | ctx->rule->up.evictable = false; | |
2137 | } | |
2138 | ||
9583bc14 EJ |
2139 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { |
2140 | struct ofpact_controller *controller; | |
2141 | const struct ofpact_metadata *metadata; | |
2142 | ||
2143 | if (ctx->exit) { | |
2144 | break; | |
2145 | } | |
2146 | ||
2147 | switch (a->type) { | |
2148 | case OFPACT_OUTPUT: | |
2149 | xlate_output_action(ctx, ofpact_get_OUTPUT(a)->port, | |
2150 | ofpact_get_OUTPUT(a)->max_len, true); | |
2151 | break; | |
2152 | ||
2153 | case OFPACT_CONTROLLER: | |
2154 | controller = ofpact_get_CONTROLLER(a); | |
2155 | execute_controller_action(ctx, controller->max_len, | |
2156 | controller->reason, | |
2157 | controller->controller_id); | |
2158 | break; | |
2159 | ||
2160 | case OFPACT_ENQUEUE: | |
2161 | xlate_enqueue_action(ctx, ofpact_get_ENQUEUE(a)); | |
2162 | break; | |
2163 | ||
2164 | case OFPACT_SET_VLAN_VID: | |
f74e7df7 | 2165 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
33bf9176 BP |
2166 | flow->vlan_tci &= ~htons(VLAN_VID_MASK); |
2167 | flow->vlan_tci |= (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid) | |
2168 | | htons(VLAN_CFI)); | |
9583bc14 EJ |
2169 | break; |
2170 | ||
2171 | case OFPACT_SET_VLAN_PCP: | |
f74e7df7 | 2172 | wc->masks.vlan_tci |= htons(VLAN_PCP_MASK | VLAN_CFI); |
33bf9176 BP |
2173 | flow->vlan_tci &= ~htons(VLAN_PCP_MASK); |
2174 | flow->vlan_tci |= | |
9583bc14 EJ |
2175 | htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp << VLAN_PCP_SHIFT) |
2176 | | VLAN_CFI); | |
2177 | break; | |
2178 | ||
2179 | case OFPACT_STRIP_VLAN: | |
f74e7df7 | 2180 | memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci); |
33bf9176 | 2181 | flow->vlan_tci = htons(0); |
9583bc14 EJ |
2182 | break; |
2183 | ||
2184 | case OFPACT_PUSH_VLAN: | |
2185 | /* XXX 802.1AD(QinQ) */ | |
f74e7df7 | 2186 | memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci); |
33bf9176 | 2187 | flow->vlan_tci = htons(VLAN_CFI); |
9583bc14 EJ |
2188 | break; |
2189 | ||
2190 | case OFPACT_SET_ETH_SRC: | |
f74e7df7 | 2191 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); |
33bf9176 | 2192 | memcpy(flow->dl_src, ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN); |
9583bc14 EJ |
2193 | break; |
2194 | ||
2195 | case OFPACT_SET_ETH_DST: | |
f74e7df7 | 2196 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); |
33bf9176 | 2197 | memcpy(flow->dl_dst, ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN); |
9583bc14 EJ |
2198 | break; |
2199 | ||
2200 | case OFPACT_SET_IPV4_SRC: | |
f74e7df7 | 2201 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); |
33bf9176 BP |
2202 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
2203 | flow->nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4; | |
9583bc14 EJ |
2204 | } |
2205 | break; | |
2206 | ||
2207 | case OFPACT_SET_IPV4_DST: | |
f74e7df7 | 2208 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); |
33bf9176 BP |
2209 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
2210 | flow->nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4; | |
9583bc14 EJ |
2211 | } |
2212 | break; | |
2213 | ||
2214 | case OFPACT_SET_IPV4_DSCP: | |
f74e7df7 | 2215 | wc->masks.nw_tos |= IP_DSCP_MASK; |
9583bc14 | 2216 | /* OpenFlow 1.0 only supports IPv4. */ |
33bf9176 BP |
2217 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
2218 | flow->nw_tos &= ~IP_DSCP_MASK; | |
2219 | flow->nw_tos |= ofpact_get_SET_IPV4_DSCP(a)->dscp; | |
9583bc14 EJ |
2220 | } |
2221 | break; | |
2222 | ||
2223 | case OFPACT_SET_L4_SRC_PORT: | |
33bf9176 | 2224 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
f74e7df7 | 2225 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); |
33bf9176 BP |
2226 | if (is_ip_any(flow)) { |
2227 | flow->tp_src = htons(ofpact_get_SET_L4_SRC_PORT(a)->port); | |
9583bc14 EJ |
2228 | } |
2229 | break; | |
2230 | ||
2231 | case OFPACT_SET_L4_DST_PORT: | |
33bf9176 | 2232 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
f74e7df7 | 2233 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); |
33bf9176 BP |
2234 | if (is_ip_any(flow)) { |
2235 | flow->tp_dst = htons(ofpact_get_SET_L4_DST_PORT(a)->port); | |
9583bc14 EJ |
2236 | } |
2237 | break; | |
2238 | ||
2239 | case OFPACT_RESUBMIT: | |
2240 | xlate_ofpact_resubmit(ctx, ofpact_get_RESUBMIT(a)); | |
2241 | break; | |
2242 | ||
2243 | case OFPACT_SET_TUNNEL: | |
33bf9176 | 2244 | flow->tunnel.tun_id = htonll(ofpact_get_SET_TUNNEL(a)->tun_id); |
9583bc14 EJ |
2245 | break; |
2246 | ||
2247 | case OFPACT_SET_QUEUE: | |
2248 | xlate_set_queue_action(ctx, ofpact_get_SET_QUEUE(a)->queue_id); | |
2249 | break; | |
2250 | ||
2251 | case OFPACT_POP_QUEUE: | |
33bf9176 | 2252 | flow->skb_priority = ctx->orig_skb_priority; |
9583bc14 EJ |
2253 | break; |
2254 | ||
2255 | case OFPACT_REG_MOVE: | |
33bf9176 | 2256 | nxm_execute_reg_move(ofpact_get_REG_MOVE(a), flow, wc); |
9583bc14 EJ |
2257 | break; |
2258 | ||
2259 | case OFPACT_REG_LOAD: | |
33bf9176 | 2260 | nxm_execute_reg_load(ofpact_get_REG_LOAD(a), flow); |
9583bc14 EJ |
2261 | break; |
2262 | ||
2263 | case OFPACT_STACK_PUSH: | |
33bf9176 BP |
2264 | nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), flow, wc, |
2265 | &ctx->stack); | |
9583bc14 EJ |
2266 | break; |
2267 | ||
2268 | case OFPACT_STACK_POP: | |
f74e7df7 JP |
2269 | nxm_execute_stack_pop(ofpact_get_STACK_POP(a), flow, wc, |
2270 | &ctx->stack); | |
9583bc14 EJ |
2271 | break; |
2272 | ||
2273 | case OFPACT_PUSH_MPLS: | |
9cfef3d0 | 2274 | compose_mpls_push_action(ctx, ofpact_get_PUSH_MPLS(a)->ethertype); |
9583bc14 EJ |
2275 | break; |
2276 | ||
2277 | case OFPACT_POP_MPLS: | |
9cfef3d0 | 2278 | compose_mpls_pop_action(ctx, ofpact_get_POP_MPLS(a)->ethertype); |
9583bc14 EJ |
2279 | break; |
2280 | ||
2281 | case OFPACT_SET_MPLS_TTL: | |
9cfef3d0 | 2282 | if (compose_set_mpls_ttl_action(ctx, |
9583bc14 EJ |
2283 | ofpact_get_SET_MPLS_TTL(a)->ttl)) { |
2284 | goto out; | |
2285 | } | |
2286 | break; | |
2287 | ||
2288 | case OFPACT_DEC_MPLS_TTL: | |
9cfef3d0 | 2289 | if (compose_dec_mpls_ttl_action(ctx)) { |
9583bc14 EJ |
2290 | goto out; |
2291 | } | |
2292 | break; | |
2293 | ||
2294 | case OFPACT_DEC_TTL: | |
f74e7df7 | 2295 | wc->masks.nw_ttl = 0xff; |
9583bc14 EJ |
2296 | if (compose_dec_ttl(ctx, ofpact_get_DEC_TTL(a))) { |
2297 | goto out; | |
2298 | } | |
2299 | break; | |
2300 | ||
2301 | case OFPACT_NOTE: | |
2302 | /* Nothing to do. */ | |
2303 | break; | |
2304 | ||
2305 | case OFPACT_MULTIPATH: | |
33bf9176 | 2306 | multipath_execute(ofpact_get_MULTIPATH(a), flow, wc); |
9583bc14 EJ |
2307 | break; |
2308 | ||
2309 | case OFPACT_BUNDLE: | |
9583bc14 EJ |
2310 | xlate_bundle_action(ctx, ofpact_get_BUNDLE(a)); |
2311 | break; | |
2312 | ||
2313 | case OFPACT_OUTPUT_REG: | |
2314 | xlate_output_reg_action(ctx, ofpact_get_OUTPUT_REG(a)); | |
2315 | break; | |
2316 | ||
2317 | case OFPACT_LEARN: | |
2318 | xlate_learn_action(ctx, ofpact_get_LEARN(a)); | |
2319 | break; | |
2320 | ||
2321 | case OFPACT_EXIT: | |
2322 | ctx->exit = true; | |
2323 | break; | |
2324 | ||
2325 | case OFPACT_FIN_TIMEOUT: | |
33bf9176 | 2326 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
9583bc14 EJ |
2327 | ctx->xout->has_fin_timeout = true; |
2328 | xlate_fin_timeout(ctx, ofpact_get_FIN_TIMEOUT(a)); | |
2329 | break; | |
2330 | ||
2331 | case OFPACT_CLEAR_ACTIONS: | |
2332 | /* XXX | |
2333 | * Nothing to do because writa-actions is not supported for now. | |
2334 | * When writa-actions is supported, clear-actions also must | |
2335 | * be supported at the same time. | |
2336 | */ | |
2337 | break; | |
2338 | ||
2339 | case OFPACT_WRITE_METADATA: | |
2340 | metadata = ofpact_get_WRITE_METADATA(a); | |
33bf9176 BP |
2341 | flow->metadata &= ~metadata->mask; |
2342 | flow->metadata |= metadata->metadata & metadata->mask; | |
9583bc14 EJ |
2343 | break; |
2344 | ||
638a19b0 JR |
2345 | case OFPACT_METER: |
2346 | /* Not implemented yet. */ | |
2347 | break; | |
2348 | ||
9583bc14 EJ |
2349 | case OFPACT_GOTO_TABLE: { |
2350 | /* It is assumed that goto-table is the last action. */ | |
2351 | struct ofpact_goto_table *ogt = ofpact_get_GOTO_TABLE(a); | |
9583bc14 EJ |
2352 | |
2353 | ovs_assert(ctx->table_id < ogt->table_id); | |
4468099e EJ |
2354 | xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port, |
2355 | ogt->table_id, true); | |
9583bc14 EJ |
2356 | break; |
2357 | } | |
2358 | ||
2359 | case OFPACT_SAMPLE: | |
2360 | xlate_sample_action(ctx, ofpact_get_SAMPLE(a)); | |
2361 | break; | |
2362 | } | |
2363 | } | |
2364 | ||
2365 | out: | |
2366 | if (ctx->rule) { | |
2367 | ctx->rule->up.evictable = was_evictable; | |
2368 | } | |
2369 | } | |
2370 | ||
2371 | void | |
2372 | xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto, | |
2373 | const struct flow *flow, struct rule_dpif *rule, | |
2374 | uint8_t tcp_flags, const struct ofpbuf *packet) | |
2375 | { | |
2376 | xin->ofproto = ofproto; | |
2377 | xin->flow = *flow; | |
2378 | xin->packet = packet; | |
2379 | xin->may_learn = packet != NULL; | |
2380 | xin->rule = rule; | |
2381 | xin->ofpacts = NULL; | |
2382 | xin->ofpacts_len = 0; | |
2383 | xin->tcp_flags = tcp_flags; | |
2384 | xin->resubmit_hook = NULL; | |
2385 | xin->report_hook = NULL; | |
2386 | xin->resubmit_stats = NULL; | |
2387 | } | |
2388 | ||
2389 | void | |
2390 | xlate_out_uninit(struct xlate_out *xout) | |
2391 | { | |
2392 | if (xout) { | |
2393 | ofpbuf_uninit(&xout->odp_actions); | |
2394 | } | |
2395 | } | |
2396 | ||
2397 | /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts' | |
2398 | * into datapath actions, using 'ctx', and discards the datapath actions. */ | |
2399 | void | |
2400 | xlate_actions_for_side_effects(struct xlate_in *xin) | |
2401 | { | |
2402 | struct xlate_out xout; | |
2403 | ||
2404 | xlate_actions(xin, &xout); | |
2405 | xlate_out_uninit(&xout); | |
2406 | } | |
2407 | ||
2408 | static void | |
2409 | xlate_report(struct xlate_ctx *ctx, const char *s) | |
2410 | { | |
2411 | if (ctx->xin->report_hook) { | |
4d0acc70 | 2412 | ctx->xin->report_hook(ctx->xin, s, ctx->recurse); |
9583bc14 EJ |
2413 | } |
2414 | } | |
2415 | ||
2416 | void | |
2417 | xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src) | |
2418 | { | |
2419 | dst->wc = src->wc; | |
9583bc14 EJ |
2420 | dst->slow = src->slow; |
2421 | dst->has_learn = src->has_learn; | |
2422 | dst->has_normal = src->has_normal; | |
2423 | dst->has_fin_timeout = src->has_fin_timeout; | |
2424 | dst->nf_output_iface = src->nf_output_iface; | |
2425 | dst->mirrors = src->mirrors; | |
2426 | ||
2427 | ofpbuf_use_stub(&dst->odp_actions, dst->odp_actions_stub, | |
2428 | sizeof dst->odp_actions_stub); | |
2429 | ofpbuf_put(&dst->odp_actions, src->odp_actions.data, | |
2430 | src->odp_actions.size); | |
2431 | } | |
2432 | \f | |
55954f6e EJ |
2433 | static struct skb_priority_to_dscp * |
2434 | get_skb_priority(const struct xport *xport, uint32_t skb_priority) | |
2435 | { | |
2436 | struct skb_priority_to_dscp *pdscp; | |
2437 | uint32_t hash; | |
2438 | ||
2439 | hash = hash_int(skb_priority, 0); | |
2440 | HMAP_FOR_EACH_IN_BUCKET (pdscp, hmap_node, hash, &xport->skb_priorities) { | |
2441 | if (pdscp->skb_priority == skb_priority) { | |
2442 | return pdscp; | |
2443 | } | |
2444 | } | |
2445 | return NULL; | |
2446 | } | |
2447 | ||
2448 | static bool | |
2449 | dscp_from_skb_priority(const struct xport *xport, uint32_t skb_priority, | |
2450 | uint8_t *dscp) | |
2451 | { | |
2452 | struct skb_priority_to_dscp *pdscp = get_skb_priority(xport, skb_priority); | |
2453 | *dscp = pdscp ? pdscp->dscp : 0; | |
2454 | return pdscp != NULL; | |
2455 | } | |
2456 | ||
2457 | static void | |
2458 | clear_skb_priorities(struct xport *xport) | |
2459 | { | |
2460 | struct skb_priority_to_dscp *pdscp, *next; | |
2461 | ||
2462 | HMAP_FOR_EACH_SAFE (pdscp, next, hmap_node, &xport->skb_priorities) { | |
2463 | hmap_remove(&xport->skb_priorities, &pdscp->hmap_node); | |
2464 | free(pdscp); | |
2465 | } | |
2466 | } | |
2467 | ||
ce4a6b76 BP |
2468 | static bool |
2469 | actions_output_to_local_port(const struct xlate_ctx *ctx) | |
2470 | { | |
46c88433 | 2471 | odp_port_t local_odp_port = ofp_port_to_odp_port(ctx->xbridge, OFPP_LOCAL); |
ce4a6b76 BP |
2472 | const struct nlattr *a; |
2473 | unsigned int left; | |
2474 | ||
2475 | NL_ATTR_FOR_EACH_UNSAFE (a, left, ctx->xout->odp_actions.data, | |
2476 | ctx->xout->odp_actions.size) { | |
2477 | if (nl_attr_type(a) == OVS_ACTION_ATTR_OUTPUT | |
2478 | && nl_attr_get_odp_port(a) == local_odp_port) { | |
2479 | return true; | |
2480 | } | |
2481 | } | |
2482 | return false; | |
2483 | } | |
9583bc14 EJ |
2484 | |
2485 | /* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts' | |
2486 | * into datapath actions in 'odp_actions', using 'ctx'. */ | |
2487 | void | |
2488 | xlate_actions(struct xlate_in *xin, struct xlate_out *xout) | |
2489 | { | |
33bf9176 BP |
2490 | struct flow_wildcards *wc = &xout->wc; |
2491 | struct flow *flow = &xin->flow; | |
2492 | ||
9583bc14 EJ |
2493 | enum slow_path_reason special; |
2494 | const struct ofpact *ofpacts; | |
46c88433 | 2495 | struct xport *in_port; |
9583bc14 EJ |
2496 | struct flow orig_flow; |
2497 | struct xlate_ctx ctx; | |
2498 | size_t ofpacts_len; | |
2499 | ||
46c88433 | 2500 | COVERAGE_INC(xlate_actions); |
9583bc14 | 2501 | |
dc24a00f EJ |
2502 | ovs_rwlock_rdlock(&xlate_rwlock); |
2503 | ||
9583bc14 EJ |
2504 | /* Flow initialization rules: |
2505 | * - 'base_flow' must match the kernel's view of the packet at the | |
2506 | * time that action processing starts. 'flow' represents any | |
2507 | * transformations we wish to make through actions. | |
2508 | * - By default 'base_flow' and 'flow' are the same since the input | |
2509 | * packet matches the output before any actions are applied. | |
2510 | * - When using VLAN splinters, 'base_flow''s VLAN is set to the value | |
2511 | * of the received packet as seen by the kernel. If we later output | |
2512 | * to another device without any modifications this will cause us to | |
2513 | * insert a new tag since the original one was stripped off by the | |
2514 | * VLAN device. | |
2515 | * - Tunnel metadata as received is retained in 'flow'. This allows | |
2516 | * tunnel metadata matching also in later tables. | |
2517 | * Since a kernel action for setting the tunnel metadata will only be | |
2518 | * generated with actual tunnel output, changing the tunnel metadata | |
2519 | * values in 'flow' (such as tun_id) will only have effect with a later | |
2520 | * tunnel output action. | |
2521 | * - Tunnel 'base_flow' is completely cleared since that is what the | |
2522 | * kernel does. If we wish to maintain the original values an action | |
2523 | * needs to be generated. */ | |
2524 | ||
2525 | ctx.xin = xin; | |
2526 | ctx.xout = xout; | |
46c88433 EJ |
2527 | ctx.xout->slow = 0; |
2528 | ctx.xout->has_learn = false; | |
2529 | ctx.xout->has_normal = false; | |
2530 | ctx.xout->has_fin_timeout = false; | |
2531 | ctx.xout->nf_output_iface = NF_OUT_DROP; | |
2532 | ctx.xout->mirrors = 0; | |
2533 | ofpbuf_use_stub(&ctx.xout->odp_actions, ctx.xout->odp_actions_stub, | |
2534 | sizeof ctx.xout->odp_actions_stub); | |
2535 | ofpbuf_reserve(&ctx.xout->odp_actions, NL_A_U32_SIZE); | |
2536 | ||
2537 | ctx.xbridge = xbridge_lookup(xin->ofproto); | |
2538 | if (!ctx.xbridge) { | |
dc24a00f | 2539 | goto out; |
46c88433 | 2540 | } |
9583bc14 | 2541 | |
9583bc14 EJ |
2542 | ctx.rule = xin->rule; |
2543 | ||
33bf9176 | 2544 | ctx.base_flow = *flow; |
9583bc14 | 2545 | memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel); |
33bf9176 | 2546 | ctx.orig_tunnel_ip_dst = flow->tunnel.ip_dst; |
9583bc14 | 2547 | |
33bf9176 BP |
2548 | flow_wildcards_init_catchall(wc); |
2549 | memset(&wc->masks.in_port, 0xff, sizeof wc->masks.in_port); | |
1dd35f8a | 2550 | memset(&wc->masks.skb_priority, 0xff, sizeof wc->masks.skb_priority); |
7431e171 | 2551 | memset(&wc->masks.dl_type, 0xff, sizeof wc->masks.dl_type); |
1dd35f8a | 2552 | wc->masks.nw_frag |= FLOW_NW_FRAG_MASK; |
9583bc14 EJ |
2553 | |
2554 | if (tnl_port_should_receive(&ctx.xin->flow)) { | |
33bf9176 | 2555 | memset(&wc->masks.tunnel, 0xff, sizeof wc->masks.tunnel); |
8ba2ee85 JG |
2556 | /* skb_mark is currently used only by tunnels but that will likely |
2557 | * change in the future. */ | |
2558 | memset(&wc->masks.skb_mark, 0xff, sizeof wc->masks.skb_mark); | |
9583bc14 | 2559 | } |
46c88433 | 2560 | if (ctx.xbridge->has_netflow) { |
9b658910 | 2561 | netflow_mask_wc(flow, wc); |
9583bc14 EJ |
2562 | } |
2563 | ||
9583bc14 | 2564 | ctx.recurse = 0; |
33bf9176 | 2565 | ctx.orig_skb_priority = flow->skb_priority; |
9583bc14 EJ |
2566 | ctx.table_id = 0; |
2567 | ctx.exit = false; | |
2568 | ||
2569 | if (xin->ofpacts) { | |
2570 | ofpacts = xin->ofpacts; | |
2571 | ofpacts_len = xin->ofpacts_len; | |
2572 | } else if (xin->rule) { | |
2573 | ofpacts = xin->rule->up.ofpacts; | |
2574 | ofpacts_len = xin->rule->up.ofpacts_len; | |
2575 | } else { | |
2576 | NOT_REACHED(); | |
2577 | } | |
2578 | ||
2579 | ofpbuf_use_stub(&ctx.stack, ctx.init_stack, sizeof ctx.init_stack); | |
2580 | ||
ade6ad9c | 2581 | if (mbridge_has_mirrors(ctx.xbridge->mbridge)) { |
9583bc14 EJ |
2582 | /* Do this conditionally because the copy is expensive enough that it |
2583 | * shows up in profiles. */ | |
33bf9176 | 2584 | orig_flow = *flow; |
9583bc14 EJ |
2585 | } |
2586 | ||
33bf9176 | 2587 | if (flow->nw_frag & FLOW_NW_FRAG_ANY) { |
46c88433 | 2588 | switch (ctx.xbridge->frag) { |
9583bc14 EJ |
2589 | case OFPC_FRAG_NORMAL: |
2590 | /* We must pretend that transport ports are unavailable. */ | |
33bf9176 BP |
2591 | flow->tp_src = ctx.base_flow.tp_src = htons(0); |
2592 | flow->tp_dst = ctx.base_flow.tp_dst = htons(0); | |
9583bc14 EJ |
2593 | break; |
2594 | ||
2595 | case OFPC_FRAG_DROP: | |
dc24a00f | 2596 | goto out; |
9583bc14 EJ |
2597 | |
2598 | case OFPC_FRAG_REASM: | |
2599 | NOT_REACHED(); | |
2600 | ||
2601 | case OFPC_FRAG_NX_MATCH: | |
2602 | /* Nothing to do. */ | |
2603 | break; | |
2604 | ||
2605 | case OFPC_INVALID_TTL_TO_CONTROLLER: | |
2606 | NOT_REACHED(); | |
2607 | } | |
2608 | } | |
2609 | ||
46c88433 | 2610 | in_port = get_ofp_port(ctx.xbridge, flow->in_port.ofp_port); |
642dc74d | 2611 | special = process_special(&ctx, flow, in_port, ctx.xin->packet); |
9583bc14 EJ |
2612 | if (special) { |
2613 | ctx.xout->slow = special; | |
2614 | } else { | |
9583bc14 | 2615 | size_t sample_actions_len; |
9583bc14 | 2616 | |
4e022ec0 | 2617 | if (flow->in_port.ofp_port |
46c88433 EJ |
2618 | != vsp_realdev_to_vlandev(ctx.xbridge->ofproto, |
2619 | flow->in_port.ofp_port, | |
33bf9176 | 2620 | flow->vlan_tci)) { |
9583bc14 EJ |
2621 | ctx.base_flow.vlan_tci = 0; |
2622 | } | |
2623 | ||
2624 | add_sflow_action(&ctx); | |
2625 | add_ipfix_action(&ctx); | |
2626 | sample_actions_len = ctx.xout->odp_actions.size; | |
2627 | ||
2628 | if (tunnel_ecn_ok(&ctx) && (!in_port || may_receive(in_port, &ctx))) { | |
2629 | do_xlate_actions(ofpacts, ofpacts_len, &ctx); | |
2630 | ||
2631 | /* We've let OFPP_NORMAL and the learning action look at the | |
2632 | * packet, so drop it now if forwarding is disabled. */ | |
9d189a50 | 2633 | if (in_port && !xport_stp_forward_state(in_port)) { |
9583bc14 EJ |
2634 | ctx.xout->odp_actions.size = sample_actions_len; |
2635 | } | |
2636 | } | |
2637 | ||
46c88433 | 2638 | if (ctx.xbridge->has_in_band |
ce4a6b76 BP |
2639 | && in_band_must_output_to_local_port(flow) |
2640 | && !actions_output_to_local_port(&ctx)) { | |
9583bc14 EJ |
2641 | compose_output_action(&ctx, OFPP_LOCAL); |
2642 | } | |
aaa0fbae EJ |
2643 | |
2644 | fix_sflow_action(&ctx); | |
2645 | ||
46c88433 | 2646 | if (mbridge_has_mirrors(ctx.xbridge->mbridge)) { |
9583bc14 EJ |
2647 | add_mirror_actions(&ctx, &orig_flow); |
2648 | } | |
9583bc14 EJ |
2649 | } |
2650 | ||
2651 | ofpbuf_uninit(&ctx.stack); | |
2652 | ||
2653 | /* Clear the metadata and register wildcard masks, because we won't | |
2654 | * use non-header fields as part of the cache. */ | |
33bf9176 BP |
2655 | memset(&wc->masks.metadata, 0, sizeof wc->masks.metadata); |
2656 | memset(&wc->masks.regs, 0, sizeof wc->masks.regs); | |
dc24a00f EJ |
2657 | |
2658 | out: | |
2659 | ovs_rwlock_unlock(&xlate_rwlock); | |
9583bc14 | 2660 | } |