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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. */ | |
92cf817b | 124 | int stp_port_no; /* STP port number or -1 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 | 203 | |
46c88433 EJ |
204 | static struct xbridge *xbridge_lookup(const struct ofproto_dpif *); |
205 | static struct xbundle *xbundle_lookup(const struct ofbundle *); | |
5e6af486 | 206 | static struct xport *xport_lookup(const struct ofport_dpif *); |
46c88433 | 207 | static struct xport *get_ofp_port(const struct xbridge *, ofp_port_t ofp_port); |
55954f6e EJ |
208 | static struct skb_priority_to_dscp *get_skb_priority(const struct xport *, |
209 | uint32_t skb_priority); | |
210 | static void clear_skb_priorities(struct xport *); | |
211 | static bool dscp_from_skb_priority(const struct xport *, uint32_t skb_priority, | |
212 | uint8_t *dscp); | |
46c88433 EJ |
213 | |
214 | void | |
215 | xlate_ofproto_set(struct ofproto_dpif *ofproto, const char *name, | |
ec89fc6f EJ |
216 | struct dpif *dpif, struct rule_dpif *miss_rule, |
217 | struct rule_dpif *no_packet_in_rule, | |
218 | const struct mac_learning *ml, struct stp *stp, | |
219 | const struct mbridge *mbridge, | |
46c88433 EJ |
220 | const struct dpif_sflow *sflow, |
221 | const struct dpif_ipfix *ipfix, enum ofp_config_flags frag, | |
9d189a50 | 222 | bool forward_bpdu, bool has_in_band, bool has_netflow) |
46c88433 EJ |
223 | { |
224 | struct xbridge *xbridge = xbridge_lookup(ofproto); | |
225 | ||
226 | if (!xbridge) { | |
227 | xbridge = xzalloc(sizeof *xbridge); | |
228 | xbridge->ofproto = ofproto; | |
229 | ||
230 | hmap_insert(&xbridges, &xbridge->hmap_node, hash_pointer(ofproto, 0)); | |
231 | hmap_init(&xbridge->xports); | |
232 | list_init(&xbridge->xbundles); | |
233 | } | |
234 | ||
235 | if (xbridge->ml != ml) { | |
236 | mac_learning_unref(xbridge->ml); | |
237 | xbridge->ml = mac_learning_ref(ml); | |
238 | } | |
239 | ||
240 | if (xbridge->mbridge != mbridge) { | |
241 | mbridge_unref(xbridge->mbridge); | |
242 | xbridge->mbridge = mbridge_ref(mbridge); | |
243 | } | |
244 | ||
245 | if (xbridge->sflow != sflow) { | |
246 | dpif_sflow_unref(xbridge->sflow); | |
247 | xbridge->sflow = dpif_sflow_ref(sflow); | |
248 | } | |
249 | ||
250 | if (xbridge->ipfix != ipfix) { | |
251 | dpif_ipfix_unref(xbridge->ipfix); | |
252 | xbridge->ipfix = dpif_ipfix_ref(ipfix); | |
253 | } | |
254 | ||
9d189a50 EJ |
255 | if (xbridge->stp != stp) { |
256 | stp_unref(xbridge->stp); | |
257 | xbridge->stp = stp_ref(stp); | |
258 | } | |
259 | ||
46c88433 EJ |
260 | free(xbridge->name); |
261 | xbridge->name = xstrdup(name); | |
262 | ||
89a8a7f0 | 263 | xbridge->dpif = dpif; |
46c88433 EJ |
264 | xbridge->forward_bpdu = forward_bpdu; |
265 | xbridge->has_in_band = has_in_band; | |
266 | xbridge->has_netflow = has_netflow; | |
46c88433 | 267 | xbridge->frag = frag; |
ec89fc6f EJ |
268 | xbridge->miss_rule = miss_rule; |
269 | xbridge->no_packet_in_rule = no_packet_in_rule; | |
46c88433 EJ |
270 | } |
271 | ||
272 | void | |
273 | xlate_remove_ofproto(struct ofproto_dpif *ofproto) | |
274 | { | |
275 | struct xbridge *xbridge = xbridge_lookup(ofproto); | |
276 | struct xbundle *xbundle, *next_xbundle; | |
277 | struct xport *xport, *next_xport; | |
278 | ||
279 | if (!xbridge) { | |
280 | return; | |
281 | } | |
282 | ||
283 | HMAP_FOR_EACH_SAFE (xport, next_xport, ofp_node, &xbridge->xports) { | |
284 | xlate_ofport_remove(xport->ofport); | |
285 | } | |
286 | ||
287 | LIST_FOR_EACH_SAFE (xbundle, next_xbundle, list_node, &xbridge->xbundles) { | |
288 | xlate_bundle_remove(xbundle->ofbundle); | |
289 | } | |
290 | ||
291 | hmap_remove(&xbridges, &xbridge->hmap_node); | |
795cc5c1 EJ |
292 | mac_learning_unref(xbridge->ml); |
293 | mbridge_unref(xbridge->mbridge); | |
294 | dpif_sflow_unref(xbridge->sflow); | |
295 | dpif_ipfix_unref(xbridge->ipfix); | |
296 | stp_unref(xbridge->stp); | |
297 | hmap_destroy(&xbridge->xports); | |
46c88433 EJ |
298 | free(xbridge->name); |
299 | free(xbridge); | |
300 | } | |
301 | ||
302 | void | |
303 | xlate_bundle_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle, | |
304 | const char *name, enum port_vlan_mode vlan_mode, int vlan, | |
305 | unsigned long *trunks, bool use_priority_tags, | |
306 | const struct bond *bond, const struct lacp *lacp, | |
307 | bool floodable) | |
308 | { | |
309 | struct xbundle *xbundle = xbundle_lookup(ofbundle); | |
310 | ||
311 | if (!xbundle) { | |
312 | xbundle = xzalloc(sizeof *xbundle); | |
313 | xbundle->ofbundle = ofbundle; | |
314 | xbundle->xbridge = xbridge_lookup(ofproto); | |
315 | ||
316 | hmap_insert(&xbundles, &xbundle->hmap_node, hash_pointer(ofbundle, 0)); | |
317 | list_insert(&xbundle->xbridge->xbundles, &xbundle->list_node); | |
318 | list_init(&xbundle->xports); | |
319 | } | |
320 | ||
321 | ovs_assert(xbundle->xbridge); | |
322 | ||
323 | free(xbundle->name); | |
324 | xbundle->name = xstrdup(name); | |
325 | ||
326 | xbundle->vlan_mode = vlan_mode; | |
327 | xbundle->vlan = vlan; | |
328 | xbundle->trunks = trunks; | |
329 | xbundle->use_priority_tags = use_priority_tags; | |
330 | xbundle->floodable = floodable; | |
331 | ||
332 | if (xbundle->bond != bond) { | |
333 | bond_unref(xbundle->bond); | |
334 | xbundle->bond = bond_ref(bond); | |
335 | } | |
336 | ||
337 | if (xbundle->lacp != lacp) { | |
338 | lacp_unref(xbundle->lacp); | |
339 | xbundle->lacp = lacp_ref(lacp); | |
340 | } | |
341 | } | |
342 | ||
343 | void | |
344 | xlate_bundle_remove(struct ofbundle *ofbundle) | |
345 | { | |
346 | struct xbundle *xbundle = xbundle_lookup(ofbundle); | |
347 | struct xport *xport, *next; | |
348 | ||
349 | if (!xbundle) { | |
350 | return; | |
351 | } | |
352 | ||
353 | LIST_FOR_EACH_SAFE (xport, next, bundle_node, &xbundle->xports) { | |
354 | list_remove(&xport->bundle_node); | |
355 | xport->xbundle = NULL; | |
356 | } | |
357 | ||
358 | hmap_remove(&xbundles, &xbundle->hmap_node); | |
359 | list_remove(&xbundle->list_node); | |
360 | bond_unref(xbundle->bond); | |
361 | lacp_unref(xbundle->lacp); | |
362 | free(xbundle->name); | |
363 | free(xbundle); | |
364 | } | |
365 | ||
366 | void | |
367 | xlate_ofport_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle, | |
368 | struct ofport_dpif *ofport, ofp_port_t ofp_port, | |
369 | odp_port_t odp_port, const struct netdev *netdev, | |
370 | const struct cfm *cfm, const struct bfd *bfd, | |
9d189a50 | 371 | struct ofport_dpif *peer, int stp_port_no, |
55954f6e | 372 | const struct ofproto_port_queue *qdscp_list, size_t n_qdscp, |
9d189a50 EJ |
373 | enum ofputil_port_config config, bool is_tunnel, |
374 | bool may_enable) | |
46c88433 EJ |
375 | { |
376 | struct xport *xport = xport_lookup(ofport); | |
55954f6e | 377 | size_t i; |
46c88433 EJ |
378 | |
379 | if (!xport) { | |
380 | xport = xzalloc(sizeof *xport); | |
381 | xport->ofport = ofport; | |
382 | xport->xbridge = xbridge_lookup(ofproto); | |
383 | xport->ofp_port = ofp_port; | |
384 | ||
55954f6e | 385 | hmap_init(&xport->skb_priorities); |
46c88433 EJ |
386 | hmap_insert(&xports, &xport->hmap_node, hash_pointer(ofport, 0)); |
387 | hmap_insert(&xport->xbridge->xports, &xport->ofp_node, | |
388 | hash_ofp_port(xport->ofp_port)); | |
389 | } | |
390 | ||
391 | ovs_assert(xport->ofp_port == ofp_port); | |
392 | ||
393 | xport->config = config; | |
9d189a50 | 394 | xport->stp_port_no = stp_port_no; |
46c88433 EJ |
395 | xport->is_tunnel = is_tunnel; |
396 | xport->may_enable = may_enable; | |
397 | xport->odp_port = odp_port; | |
398 | ||
399 | if (xport->netdev != netdev) { | |
400 | netdev_close(xport->netdev); | |
401 | xport->netdev = netdev_ref(netdev); | |
402 | } | |
403 | ||
404 | if (xport->cfm != cfm) { | |
405 | cfm_unref(xport->cfm); | |
406 | xport->cfm = cfm_ref(cfm); | |
407 | } | |
408 | ||
409 | if (xport->bfd != bfd) { | |
410 | bfd_unref(xport->bfd); | |
411 | xport->bfd = bfd_ref(bfd); | |
412 | } | |
413 | ||
414 | if (xport->peer) { | |
415 | xport->peer->peer = NULL; | |
416 | } | |
5e6af486 | 417 | xport->peer = xport_lookup(peer); |
46c88433 EJ |
418 | if (xport->peer) { |
419 | xport->peer->peer = xport; | |
420 | } | |
421 | ||
422 | if (xport->xbundle) { | |
423 | list_remove(&xport->bundle_node); | |
424 | } | |
5e6af486 | 425 | xport->xbundle = xbundle_lookup(ofbundle); |
46c88433 EJ |
426 | if (xport->xbundle) { |
427 | list_insert(&xport->xbundle->xports, &xport->bundle_node); | |
428 | } | |
55954f6e EJ |
429 | |
430 | clear_skb_priorities(xport); | |
431 | for (i = 0; i < n_qdscp; i++) { | |
432 | struct skb_priority_to_dscp *pdscp; | |
433 | uint32_t skb_priority; | |
434 | ||
89a8a7f0 EJ |
435 | if (dpif_queue_to_priority(xport->xbridge->dpif, qdscp_list[i].queue, |
436 | &skb_priority)) { | |
55954f6e EJ |
437 | continue; |
438 | } | |
439 | ||
440 | pdscp = xmalloc(sizeof *pdscp); | |
441 | pdscp->skb_priority = skb_priority; | |
442 | pdscp->dscp = (qdscp_list[i].dscp << 2) & IP_DSCP_MASK; | |
443 | hmap_insert(&xport->skb_priorities, &pdscp->hmap_node, | |
444 | hash_int(pdscp->skb_priority, 0)); | |
445 | } | |
46c88433 EJ |
446 | } |
447 | ||
448 | void | |
449 | xlate_ofport_remove(struct ofport_dpif *ofport) | |
450 | { | |
451 | struct xport *xport = xport_lookup(ofport); | |
452 | ||
453 | if (!xport) { | |
454 | return; | |
455 | } | |
456 | ||
457 | if (xport->peer) { | |
458 | xport->peer->peer = NULL; | |
459 | xport->peer = NULL; | |
460 | } | |
461 | ||
e621a12d EJ |
462 | if (xport->xbundle) { |
463 | list_remove(&xport->bundle_node); | |
464 | } | |
465 | ||
55954f6e EJ |
466 | clear_skb_priorities(xport); |
467 | hmap_destroy(&xport->skb_priorities); | |
468 | ||
46c88433 EJ |
469 | hmap_remove(&xports, &xport->hmap_node); |
470 | hmap_remove(&xport->xbridge->xports, &xport->ofp_node); | |
471 | ||
472 | netdev_close(xport->netdev); | |
473 | cfm_unref(xport->cfm); | |
474 | bfd_unref(xport->bfd); | |
475 | free(xport); | |
476 | } | |
477 | ||
8449c4d6 EJ |
478 | /* Given a datpath, packet, and flow metadata ('backer', 'packet', and 'key' |
479 | * respectively), populates 'flow' with the result of odp_flow_key_to_flow(). | |
480 | * Optionally, if nonnull, populates 'fitnessp' with the fitness of 'flow' as | |
481 | * returned by odp_flow_key_to_flow(). Also, optionally populates 'ofproto' | |
482 | * with the ofproto_dpif, and 'odp_in_port' with the datapath in_port, that | |
483 | * 'packet' ingressed. | |
484 | * | |
485 | * If 'ofproto' is nonnull, requires 'flow''s in_port to exist. Otherwise sets | |
486 | * 'flow''s in_port to OFPP_NONE. | |
487 | * | |
488 | * This function does post-processing on data returned from | |
489 | * odp_flow_key_to_flow() to help make VLAN splinters transparent to the rest | |
490 | * of the upcall processing logic. In particular, if the extracted in_port is | |
491 | * a VLAN splinter port, it replaces flow->in_port by the "real" port, sets | |
492 | * flow->vlan_tci correctly for the VLAN of the VLAN splinter port, and pushes | |
493 | * a VLAN header onto 'packet' (if it is nonnull). | |
494 | * | |
495 | * Similarly, this function also includes some logic to help with tunnels. It | |
496 | * may modify 'flow' as necessary to make the tunneling implementation | |
497 | * transparent to the upcall processing logic. | |
498 | * | |
499 | * Returns 0 if successful, ENODEV if the parsed flow has no associated ofport, | |
500 | * or some other positive errno if there are other problems. */ | |
501 | int | |
502 | xlate_receive(const struct dpif_backer *backer, struct ofpbuf *packet, | |
503 | const struct nlattr *key, size_t key_len, | |
504 | struct flow *flow, enum odp_key_fitness *fitnessp, | |
505 | struct ofproto_dpif **ofproto, odp_port_t *odp_in_port) | |
506 | { | |
507 | enum odp_key_fitness fitness; | |
508 | const struct xport *xport; | |
509 | int error = ENODEV; | |
510 | ||
dc24a00f | 511 | ovs_rwlock_rdlock(&xlate_rwlock); |
8449c4d6 EJ |
512 | fitness = odp_flow_key_to_flow(key, key_len, flow); |
513 | if (fitness == ODP_FIT_ERROR) { | |
514 | error = EINVAL; | |
515 | goto exit; | |
516 | } | |
517 | ||
518 | if (odp_in_port) { | |
519 | *odp_in_port = flow->in_port.odp_port; | |
520 | } | |
521 | ||
522 | xport = xport_lookup(tnl_port_should_receive(flow) | |
523 | ? tnl_port_receive(flow) | |
524 | : odp_port_to_ofport(backer, flow->in_port.odp_port)); | |
525 | ||
526 | flow->in_port.ofp_port = xport ? xport->ofp_port : OFPP_NONE; | |
527 | if (!xport) { | |
528 | goto exit; | |
529 | } | |
530 | ||
531 | if (vsp_adjust_flow(xport->xbridge->ofproto, flow)) { | |
532 | if (packet) { | |
533 | /* Make the packet resemble the flow, so that it gets sent to | |
534 | * an OpenFlow controller properly, so that it looks correct | |
535 | * for sFlow, and so that flow_extract() will get the correct | |
536 | * vlan_tci if it is called on 'packet'. | |
537 | * | |
538 | * The allocated space inside 'packet' probably also contains | |
539 | * 'key', that is, both 'packet' and 'key' are probably part of | |
540 | * a struct dpif_upcall (see the large comment on that | |
541 | * structure definition), so pushing data on 'packet' is in | |
542 | * general not a good idea since it could overwrite 'key' or | |
543 | * free it as a side effect. However, it's OK in this special | |
544 | * case because we know that 'packet' is inside a Netlink | |
545 | * attribute: pushing 4 bytes will just overwrite the 4-byte | |
546 | * "struct nlattr", which is fine since we don't need that | |
547 | * header anymore. */ | |
548 | eth_push_vlan(packet, flow->vlan_tci); | |
549 | } | |
550 | /* We can't reproduce 'key' from 'flow'. */ | |
551 | fitness = fitness == ODP_FIT_PERFECT ? ODP_FIT_TOO_MUCH : fitness; | |
552 | } | |
553 | error = 0; | |
554 | ||
555 | if (ofproto) { | |
556 | *ofproto = xport->xbridge->ofproto; | |
557 | } | |
558 | ||
559 | exit: | |
560 | if (fitnessp) { | |
561 | *fitnessp = fitness; | |
562 | } | |
dc24a00f | 563 | ovs_rwlock_unlock(&xlate_rwlock); |
8449c4d6 EJ |
564 | return error; |
565 | } | |
566 | ||
46c88433 EJ |
567 | static struct xbridge * |
568 | xbridge_lookup(const struct ofproto_dpif *ofproto) | |
569 | { | |
570 | struct xbridge *xbridge; | |
571 | ||
5e6af486 EJ |
572 | if (!ofproto) { |
573 | return NULL; | |
574 | } | |
575 | ||
46c88433 EJ |
576 | HMAP_FOR_EACH_IN_BUCKET (xbridge, hmap_node, hash_pointer(ofproto, 0), |
577 | &xbridges) { | |
578 | if (xbridge->ofproto == ofproto) { | |
579 | return xbridge; | |
580 | } | |
581 | } | |
582 | return NULL; | |
583 | } | |
584 | ||
585 | static struct xbundle * | |
586 | xbundle_lookup(const struct ofbundle *ofbundle) | |
587 | { | |
588 | struct xbundle *xbundle; | |
589 | ||
5e6af486 EJ |
590 | if (!ofbundle) { |
591 | return NULL; | |
592 | } | |
593 | ||
46c88433 EJ |
594 | HMAP_FOR_EACH_IN_BUCKET (xbundle, hmap_node, hash_pointer(ofbundle, 0), |
595 | &xbundles) { | |
596 | if (xbundle->ofbundle == ofbundle) { | |
597 | return xbundle; | |
598 | } | |
599 | } | |
600 | return NULL; | |
601 | } | |
602 | ||
603 | static struct xport * | |
5e6af486 | 604 | xport_lookup(const struct ofport_dpif *ofport) |
46c88433 EJ |
605 | { |
606 | struct xport *xport; | |
607 | ||
5e6af486 EJ |
608 | if (!ofport) { |
609 | return NULL; | |
610 | } | |
611 | ||
46c88433 EJ |
612 | HMAP_FOR_EACH_IN_BUCKET (xport, hmap_node, hash_pointer(ofport, 0), |
613 | &xports) { | |
614 | if (xport->ofport == ofport) { | |
615 | return xport; | |
616 | } | |
617 | } | |
618 | return NULL; | |
619 | } | |
620 | ||
40085e56 EJ |
621 | static struct stp_port * |
622 | xport_get_stp_port(const struct xport *xport) | |
623 | { | |
92cf817b | 624 | return xport->xbridge->stp && xport->stp_port_no != -1 |
40085e56 EJ |
625 | ? stp_get_port(xport->xbridge->stp, xport->stp_port_no) |
626 | : NULL; | |
627 | } | |
9d189a50 EJ |
628 | |
629 | static enum stp_state | |
630 | xport_stp_learn_state(const struct xport *xport) | |
631 | { | |
40085e56 EJ |
632 | struct stp_port *sp = xport_get_stp_port(xport); |
633 | return stp_learn_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED); | |
9d189a50 EJ |
634 | } |
635 | ||
636 | static bool | |
637 | xport_stp_forward_state(const struct xport *xport) | |
638 | { | |
40085e56 EJ |
639 | struct stp_port *sp = xport_get_stp_port(xport); |
640 | return stp_forward_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED); | |
9d189a50 EJ |
641 | } |
642 | ||
643 | /* Returns true if STP should process 'flow'. Sets fields in 'wc' that | |
644 | * were used to make the determination.*/ | |
645 | static bool | |
646 | stp_should_process_flow(const struct flow *flow, struct flow_wildcards *wc) | |
647 | { | |
648 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
649 | return eth_addr_equals(flow->dl_dst, eth_addr_stp); | |
650 | } | |
651 | ||
652 | static void | |
653 | stp_process_packet(const struct xport *xport, const struct ofpbuf *packet) | |
654 | { | |
40085e56 | 655 | struct stp_port *sp = xport_get_stp_port(xport); |
9d189a50 EJ |
656 | struct ofpbuf payload = *packet; |
657 | struct eth_header *eth = payload.data; | |
9d189a50 EJ |
658 | |
659 | /* Sink packets on ports that have STP disabled when the bridge has | |
660 | * STP enabled. */ | |
661 | if (!sp || stp_port_get_state(sp) == STP_DISABLED) { | |
662 | return; | |
663 | } | |
664 | ||
665 | /* Trim off padding on payload. */ | |
666 | if (payload.size > ntohs(eth->eth_type) + ETH_HEADER_LEN) { | |
667 | payload.size = ntohs(eth->eth_type) + ETH_HEADER_LEN; | |
668 | } | |
669 | ||
670 | if (ofpbuf_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) { | |
671 | stp_received_bpdu(sp, payload.data, payload.size); | |
672 | } | |
673 | } | |
674 | ||
46c88433 EJ |
675 | static struct xport * |
676 | get_ofp_port(const struct xbridge *xbridge, ofp_port_t ofp_port) | |
677 | { | |
678 | struct xport *xport; | |
679 | ||
680 | HMAP_FOR_EACH_IN_BUCKET (xport, ofp_node, hash_ofp_port(ofp_port), | |
681 | &xbridge->xports) { | |
682 | if (xport->ofp_port == ofp_port) { | |
683 | return xport; | |
684 | } | |
685 | } | |
686 | return NULL; | |
687 | } | |
688 | ||
689 | static odp_port_t | |
690 | ofp_port_to_odp_port(const struct xbridge *xbridge, ofp_port_t ofp_port) | |
691 | { | |
692 | const struct xport *xport = get_ofp_port(xbridge, ofp_port); | |
693 | return xport ? xport->odp_port : ODPP_NONE; | |
694 | } | |
695 | ||
9583bc14 | 696 | static bool |
46c88433 | 697 | xbundle_trunks_vlan(const struct xbundle *bundle, uint16_t vlan) |
9583bc14 EJ |
698 | { |
699 | return (bundle->vlan_mode != PORT_VLAN_ACCESS | |
700 | && (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan))); | |
701 | } | |
702 | ||
703 | static bool | |
46c88433 EJ |
704 | xbundle_includes_vlan(const struct xbundle *xbundle, uint16_t vlan) |
705 | { | |
706 | return vlan == xbundle->vlan || xbundle_trunks_vlan(xbundle, vlan); | |
707 | } | |
708 | ||
709 | static mirror_mask_t | |
710 | xbundle_mirror_out(const struct xbridge *xbridge, struct xbundle *xbundle) | |
711 | { | |
712 | return xbundle != &ofpp_none_bundle | |
713 | ? mirror_bundle_out(xbridge->mbridge, xbundle->ofbundle) | |
714 | : 0; | |
715 | } | |
716 | ||
717 | static mirror_mask_t | |
718 | xbundle_mirror_src(const struct xbridge *xbridge, struct xbundle *xbundle) | |
9583bc14 | 719 | { |
46c88433 EJ |
720 | return xbundle != &ofpp_none_bundle |
721 | ? mirror_bundle_src(xbridge->mbridge, xbundle->ofbundle) | |
722 | : 0; | |
9583bc14 EJ |
723 | } |
724 | ||
46c88433 EJ |
725 | static mirror_mask_t |
726 | xbundle_mirror_dst(const struct xbridge *xbridge, struct xbundle *xbundle) | |
9583bc14 | 727 | { |
46c88433 EJ |
728 | return xbundle != &ofpp_none_bundle |
729 | ? mirror_bundle_dst(xbridge->mbridge, xbundle->ofbundle) | |
730 | : 0; | |
731 | } | |
732 | ||
733 | static struct xbundle * | |
734 | lookup_input_bundle(const struct xbridge *xbridge, ofp_port_t in_port, | |
735 | bool warn, struct xport **in_xportp) | |
736 | { | |
737 | struct xport *xport; | |
9583bc14 EJ |
738 | |
739 | /* Find the port and bundle for the received packet. */ | |
46c88433 EJ |
740 | xport = get_ofp_port(xbridge, in_port); |
741 | if (in_xportp) { | |
742 | *in_xportp = xport; | |
9583bc14 | 743 | } |
46c88433 EJ |
744 | if (xport && xport->xbundle) { |
745 | return xport->xbundle; | |
9583bc14 EJ |
746 | } |
747 | ||
748 | /* Special-case OFPP_NONE, which a controller may use as the ingress | |
749 | * port for traffic that it is sourcing. */ | |
750 | if (in_port == OFPP_NONE) { | |
3815d6c2 LS |
751 | ofpp_none_bundle.name = "OFPP_NONE"; |
752 | ofpp_none_bundle.vlan_mode = PORT_VLAN_TRUNK; | |
9583bc14 EJ |
753 | return &ofpp_none_bundle; |
754 | } | |
755 | ||
756 | /* Odd. A few possible reasons here: | |
757 | * | |
758 | * - We deleted a port but there are still a few packets queued up | |
759 | * from it. | |
760 | * | |
761 | * - Someone externally added a port (e.g. "ovs-dpctl add-if") that | |
762 | * we don't know about. | |
763 | * | |
764 | * - The ofproto client didn't configure the port as part of a bundle. | |
765 | * This is particularly likely to happen if a packet was received on the | |
766 | * port after it was created, but before the client had a chance to | |
767 | * configure its bundle. | |
768 | */ | |
769 | if (warn) { | |
770 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
771 | ||
772 | VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown " | |
46c88433 | 773 | "port %"PRIu16, xbridge->name, in_port); |
9583bc14 EJ |
774 | } |
775 | return NULL; | |
776 | } | |
777 | ||
778 | static void | |
779 | add_mirror_actions(struct xlate_ctx *ctx, const struct flow *orig_flow) | |
780 | { | |
46c88433 | 781 | const struct xbridge *xbridge = ctx->xbridge; |
9583bc14 | 782 | mirror_mask_t mirrors; |
46c88433 | 783 | struct xbundle *in_xbundle; |
9583bc14 EJ |
784 | uint16_t vlan; |
785 | uint16_t vid; | |
cdf5d3a5 EJ |
786 | |
787 | mirrors = ctx->xout->mirrors; | |
788 | ctx->xout->mirrors = 0; | |
9583bc14 | 789 | |
46c88433 EJ |
790 | in_xbundle = lookup_input_bundle(xbridge, orig_flow->in_port.ofp_port, |
791 | ctx->xin->packet != NULL, NULL); | |
792 | if (!in_xbundle) { | |
9583bc14 EJ |
793 | return; |
794 | } | |
46c88433 | 795 | mirrors |= xbundle_mirror_src(xbridge, in_xbundle); |
9583bc14 EJ |
796 | |
797 | /* Drop frames on bundles reserved for mirroring. */ | |
46c88433 | 798 | if (xbundle_mirror_out(xbridge, in_xbundle)) { |
9583bc14 EJ |
799 | if (ctx->xin->packet != NULL) { |
800 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
801 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port " | |
802 | "%s, which is reserved exclusively for mirroring", | |
46c88433 | 803 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 | 804 | } |
aaa0fbae | 805 | ofpbuf_clear(&ctx->xout->odp_actions); |
9583bc14 EJ |
806 | return; |
807 | } | |
808 | ||
809 | /* Check VLAN. */ | |
810 | vid = vlan_tci_to_vid(orig_flow->vlan_tci); | |
46c88433 | 811 | if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) { |
9583bc14 EJ |
812 | return; |
813 | } | |
46c88433 | 814 | vlan = input_vid_to_vlan(in_xbundle, vid); |
9583bc14 | 815 | |
9583bc14 EJ |
816 | if (!mirrors) { |
817 | return; | |
818 | } | |
819 | ||
820 | /* Restore the original packet before adding the mirror actions. */ | |
821 | ctx->xin->flow = *orig_flow; | |
822 | ||
823 | while (mirrors) { | |
ec7ceaed EJ |
824 | mirror_mask_t dup_mirrors; |
825 | struct ofbundle *out; | |
826 | unsigned long *vlans; | |
827 | bool vlan_mirrored; | |
828 | bool has_mirror; | |
829 | int out_vlan; | |
830 | ||
46c88433 | 831 | has_mirror = mirror_get(xbridge->mbridge, mirror_mask_ffs(mirrors) - 1, |
ec7ceaed EJ |
832 | &vlans, &dup_mirrors, &out, &out_vlan); |
833 | ovs_assert(has_mirror); | |
834 | ||
835 | if (vlans) { | |
9583bc14 EJ |
836 | ctx->xout->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK); |
837 | } | |
ec7ceaed EJ |
838 | vlan_mirrored = !vlans || bitmap_is_set(vlans, vlan); |
839 | free(vlans); | |
9583bc14 | 840 | |
ec7ceaed | 841 | if (!vlan_mirrored) { |
9583bc14 EJ |
842 | mirrors = zero_rightmost_1bit(mirrors); |
843 | continue; | |
844 | } | |
845 | ||
ec7ceaed EJ |
846 | mirrors &= ~dup_mirrors; |
847 | ctx->xout->mirrors |= dup_mirrors; | |
848 | if (out) { | |
46c88433 EJ |
849 | struct xbundle *out_xbundle = xbundle_lookup(out); |
850 | if (out_xbundle) { | |
851 | output_normal(ctx, out_xbundle, vlan); | |
852 | } | |
ec7ceaed | 853 | } else if (vlan != out_vlan |
9583bc14 | 854 | && !eth_addr_is_reserved(orig_flow->dl_dst)) { |
46c88433 | 855 | struct xbundle *xbundle; |
9583bc14 | 856 | |
46c88433 EJ |
857 | LIST_FOR_EACH (xbundle, list_node, &xbridge->xbundles) { |
858 | if (xbundle_includes_vlan(xbundle, out_vlan) | |
859 | && !xbundle_mirror_out(xbridge, xbundle)) { | |
860 | output_normal(ctx, xbundle, out_vlan); | |
9583bc14 EJ |
861 | } |
862 | } | |
863 | } | |
864 | } | |
865 | } | |
866 | ||
867 | /* Given 'vid', the VID obtained from the 802.1Q header that was received as | |
46c88433 | 868 | * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle', |
9583bc14 EJ |
869 | * the bundle on which the packet was received, returns the VLAN to which the |
870 | * packet belongs. | |
871 | * | |
872 | * Both 'vid' and the return value are in the range 0...4095. */ | |
873 | static uint16_t | |
46c88433 | 874 | input_vid_to_vlan(const struct xbundle *in_xbundle, uint16_t vid) |
9583bc14 | 875 | { |
46c88433 | 876 | switch (in_xbundle->vlan_mode) { |
9583bc14 | 877 | case PORT_VLAN_ACCESS: |
46c88433 | 878 | return in_xbundle->vlan; |
9583bc14 EJ |
879 | break; |
880 | ||
881 | case PORT_VLAN_TRUNK: | |
882 | return vid; | |
883 | ||
884 | case PORT_VLAN_NATIVE_UNTAGGED: | |
885 | case PORT_VLAN_NATIVE_TAGGED: | |
46c88433 | 886 | return vid ? vid : in_xbundle->vlan; |
9583bc14 EJ |
887 | |
888 | default: | |
889 | NOT_REACHED(); | |
890 | } | |
891 | } | |
892 | ||
46c88433 | 893 | /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'. |
9583bc14 EJ |
894 | * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs |
895 | * a warning. | |
896 | * | |
897 | * 'vid' should be the VID obtained from the 802.1Q header that was received as | |
898 | * part of a packet (specify 0 if there was no 802.1Q header), in the range | |
899 | * 0...4095. */ | |
900 | static bool | |
46c88433 | 901 | input_vid_is_valid(uint16_t vid, struct xbundle *in_xbundle, bool warn) |
9583bc14 EJ |
902 | { |
903 | /* Allow any VID on the OFPP_NONE port. */ | |
46c88433 | 904 | if (in_xbundle == &ofpp_none_bundle) { |
9583bc14 EJ |
905 | return true; |
906 | } | |
907 | ||
46c88433 | 908 | switch (in_xbundle->vlan_mode) { |
9583bc14 EJ |
909 | case PORT_VLAN_ACCESS: |
910 | if (vid) { | |
911 | if (warn) { | |
912 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
46c88433 | 913 | VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" tagged " |
9583bc14 | 914 | "packet received on port %s configured as VLAN " |
46c88433 EJ |
915 | "%"PRIu16" access port", vid, in_xbundle->name, |
916 | in_xbundle->vlan); | |
9583bc14 EJ |
917 | } |
918 | return false; | |
919 | } | |
920 | return true; | |
921 | ||
922 | case PORT_VLAN_NATIVE_UNTAGGED: | |
923 | case PORT_VLAN_NATIVE_TAGGED: | |
924 | if (!vid) { | |
925 | /* Port must always carry its native VLAN. */ | |
926 | return true; | |
927 | } | |
928 | /* Fall through. */ | |
929 | case PORT_VLAN_TRUNK: | |
46c88433 | 930 | if (!xbundle_includes_vlan(in_xbundle, vid)) { |
9583bc14 EJ |
931 | if (warn) { |
932 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
46c88433 | 933 | VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" packet " |
9583bc14 | 934 | "received on port %s not configured for trunking " |
46c88433 | 935 | "VLAN %"PRIu16, vid, in_xbundle->name, vid); |
9583bc14 EJ |
936 | } |
937 | return false; | |
938 | } | |
939 | return true; | |
940 | ||
941 | default: | |
942 | NOT_REACHED(); | |
943 | } | |
944 | ||
945 | } | |
946 | ||
947 | /* Given 'vlan', the VLAN that a packet belongs to, and | |
46c88433 | 948 | * 'out_xbundle', a bundle on which the packet is to be output, returns the VID |
9583bc14 EJ |
949 | * that should be included in the 802.1Q header. (If the return value is 0, |
950 | * then the 802.1Q header should only be included in the packet if there is a | |
951 | * nonzero PCP.) | |
952 | * | |
953 | * Both 'vlan' and the return value are in the range 0...4095. */ | |
954 | static uint16_t | |
46c88433 | 955 | output_vlan_to_vid(const struct xbundle *out_xbundle, uint16_t vlan) |
9583bc14 | 956 | { |
46c88433 | 957 | switch (out_xbundle->vlan_mode) { |
9583bc14 EJ |
958 | case PORT_VLAN_ACCESS: |
959 | return 0; | |
960 | ||
961 | case PORT_VLAN_TRUNK: | |
962 | case PORT_VLAN_NATIVE_TAGGED: | |
963 | return vlan; | |
964 | ||
965 | case PORT_VLAN_NATIVE_UNTAGGED: | |
46c88433 | 966 | return vlan == out_xbundle->vlan ? 0 : vlan; |
9583bc14 EJ |
967 | |
968 | default: | |
969 | NOT_REACHED(); | |
970 | } | |
971 | } | |
972 | ||
973 | static void | |
46c88433 | 974 | output_normal(struct xlate_ctx *ctx, const struct xbundle *out_xbundle, |
9583bc14 EJ |
975 | uint16_t vlan) |
976 | { | |
33bf9176 | 977 | ovs_be16 *flow_tci = &ctx->xin->flow.vlan_tci; |
9583bc14 EJ |
978 | uint16_t vid; |
979 | ovs_be16 tci, old_tci; | |
46c88433 | 980 | struct xport *xport; |
9583bc14 | 981 | |
46c88433 EJ |
982 | vid = output_vlan_to_vid(out_xbundle, vlan); |
983 | if (list_is_empty(&out_xbundle->xports)) { | |
984 | /* Partially configured bundle with no slaves. Drop the packet. */ | |
985 | return; | |
986 | } else if (!out_xbundle->bond) { | |
987 | xport = CONTAINER_OF(list_front(&out_xbundle->xports), struct xport, | |
988 | bundle_node); | |
9583bc14 | 989 | } else { |
46c88433 EJ |
990 | struct ofport_dpif *ofport; |
991 | ||
992 | ofport = bond_choose_output_slave(out_xbundle->bond, &ctx->xin->flow, | |
4a1b8f30 | 993 | &ctx->xout->wc, vid); |
5e6af486 | 994 | xport = xport_lookup(ofport); |
46c88433 EJ |
995 | |
996 | if (!xport) { | |
9583bc14 EJ |
997 | /* No slaves enabled, so drop packet. */ |
998 | return; | |
999 | } | |
1000 | } | |
1001 | ||
33bf9176 | 1002 | old_tci = *flow_tci; |
9583bc14 | 1003 | tci = htons(vid); |
46c88433 | 1004 | if (tci || out_xbundle->use_priority_tags) { |
33bf9176 | 1005 | tci |= *flow_tci & htons(VLAN_PCP_MASK); |
9583bc14 EJ |
1006 | if (tci) { |
1007 | tci |= htons(VLAN_CFI); | |
1008 | } | |
1009 | } | |
33bf9176 | 1010 | *flow_tci = tci; |
9583bc14 | 1011 | |
46c88433 | 1012 | compose_output_action(ctx, xport->ofp_port); |
33bf9176 | 1013 | *flow_tci = old_tci; |
9583bc14 EJ |
1014 | } |
1015 | ||
1016 | /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after | |
1017 | * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to | |
1018 | * indicate this; newer upstream kernels use gratuitous ARP requests. */ | |
1019 | static bool | |
1020 | is_gratuitous_arp(const struct flow *flow, struct flow_wildcards *wc) | |
1021 | { | |
1022 | if (flow->dl_type != htons(ETH_TYPE_ARP)) { | |
1023 | return false; | |
1024 | } | |
1025 | ||
1026 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
1027 | if (!eth_addr_is_broadcast(flow->dl_dst)) { | |
1028 | return false; | |
1029 | } | |
1030 | ||
1031 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
1032 | if (flow->nw_proto == ARP_OP_REPLY) { | |
1033 | return true; | |
1034 | } else if (flow->nw_proto == ARP_OP_REQUEST) { | |
1035 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
1036 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
1037 | ||
1038 | return flow->nw_src == flow->nw_dst; | |
1039 | } else { | |
1040 | return false; | |
1041 | } | |
1042 | } | |
1043 | ||
ee047520 BP |
1044 | /* Checks whether a MAC learning update is necessary for MAC learning table |
1045 | * 'ml' given that a packet matching 'flow' was received on 'in_xbundle' in | |
1046 | * 'vlan'. | |
1047 | * | |
1048 | * Most packets processed through the MAC learning table do not actually | |
1049 | * change it in any way. This function requires only a read lock on the MAC | |
1050 | * learning table, so it is much cheaper in this common case. | |
1051 | * | |
1052 | * Keep the code here synchronized with that in update_learning_table__() | |
1053 | * below. */ | |
1054 | static bool | |
1055 | is_mac_learning_update_needed(const struct mac_learning *ml, | |
1056 | const struct flow *flow, | |
1057 | struct flow_wildcards *wc, | |
1058 | int vlan, struct xbundle *in_xbundle) | |
1059 | OVS_REQ_RDLOCK(ml->rwlock) | |
9583bc14 EJ |
1060 | { |
1061 | struct mac_entry *mac; | |
1062 | ||
ee047520 BP |
1063 | if (!mac_learning_may_learn(ml, flow->dl_src, vlan)) { |
1064 | return false; | |
1065 | } | |
1066 | ||
1067 | mac = mac_learning_lookup(ml, flow->dl_src, vlan); | |
1068 | if (!mac || mac_entry_age(ml, mac)) { | |
1069 | return true; | |
9583bc14 EJ |
1070 | } |
1071 | ||
ee047520 BP |
1072 | if (is_gratuitous_arp(flow, wc)) { |
1073 | /* We don't want to learn from gratuitous ARP packets that are | |
1074 | * reflected back over bond slaves so we lock the learning table. */ | |
1075 | if (!in_xbundle->bond) { | |
1076 | return true; | |
1077 | } else if (mac_entry_is_grat_arp_locked(mac)) { | |
1078 | return false; | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | return mac->port.p != in_xbundle->ofbundle; | |
1083 | } | |
1084 | ||
1085 | ||
1086 | /* Updates MAC learning table 'ml' given that a packet matching 'flow' was | |
1087 | * received on 'in_xbundle' in 'vlan'. | |
1088 | * | |
1089 | * This code repeats all the checks in is_mac_learning_update_needed() because | |
1090 | * the lock was released between there and here and thus the MAC learning state | |
1091 | * could have changed. | |
1092 | * | |
1093 | * Keep the code here synchronized with that in is_mac_learning_update_needed() | |
1094 | * above. */ | |
1095 | static void | |
1096 | update_learning_table__(const struct xbridge *xbridge, | |
1097 | const struct flow *flow, struct flow_wildcards *wc, | |
1098 | int vlan, struct xbundle *in_xbundle) | |
1099 | OVS_REQ_WRLOCK(xbridge->ml->rwlock) | |
1100 | { | |
1101 | struct mac_entry *mac; | |
1102 | ||
46c88433 | 1103 | if (!mac_learning_may_learn(xbridge->ml, flow->dl_src, vlan)) { |
ee047520 | 1104 | return; |
9583bc14 EJ |
1105 | } |
1106 | ||
46c88433 | 1107 | mac = mac_learning_insert(xbridge->ml, flow->dl_src, vlan); |
9583bc14 EJ |
1108 | if (is_gratuitous_arp(flow, wc)) { |
1109 | /* We don't want to learn from gratuitous ARP packets that are | |
1110 | * reflected back over bond slaves so we lock the learning table. */ | |
46c88433 | 1111 | if (!in_xbundle->bond) { |
9583bc14 EJ |
1112 | mac_entry_set_grat_arp_lock(mac); |
1113 | } else if (mac_entry_is_grat_arp_locked(mac)) { | |
ee047520 | 1114 | return; |
9583bc14 EJ |
1115 | } |
1116 | } | |
1117 | ||
30618594 | 1118 | if (mac->port.p != in_xbundle->ofbundle) { |
9583bc14 EJ |
1119 | /* The log messages here could actually be useful in debugging, |
1120 | * so keep the rate limit relatively high. */ | |
1121 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300); | |
ee047520 | 1122 | |
9583bc14 EJ |
1123 | VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is " |
1124 | "on port %s in VLAN %d", | |
46c88433 EJ |
1125 | xbridge->name, ETH_ADDR_ARGS(flow->dl_src), |
1126 | in_xbundle->name, vlan); | |
9583bc14 | 1127 | |
46c88433 | 1128 | mac->port.p = in_xbundle->ofbundle; |
30618594 | 1129 | mac_learning_changed(xbridge->ml); |
9583bc14 | 1130 | } |
ee047520 BP |
1131 | } |
1132 | ||
1133 | static void | |
1134 | update_learning_table(const struct xbridge *xbridge, | |
1135 | const struct flow *flow, struct flow_wildcards *wc, | |
1136 | int vlan, struct xbundle *in_xbundle) | |
1137 | { | |
1138 | bool need_update; | |
1139 | ||
1140 | /* Don't learn the OFPP_NONE port. */ | |
1141 | if (in_xbundle == &ofpp_none_bundle) { | |
1142 | return; | |
1143 | } | |
1144 | ||
1145 | /* First try the common case: no change to MAC learning table. */ | |
1146 | ovs_rwlock_rdlock(&xbridge->ml->rwlock); | |
1147 | need_update = is_mac_learning_update_needed(xbridge->ml, flow, wc, vlan, | |
1148 | in_xbundle); | |
509c0149 | 1149 | ovs_rwlock_unlock(&xbridge->ml->rwlock); |
ee047520 BP |
1150 | |
1151 | if (need_update) { | |
1152 | /* Slow path: MAC learning table might need an update. */ | |
1153 | ovs_rwlock_wrlock(&xbridge->ml->rwlock); | |
1154 | update_learning_table__(xbridge, flow, wc, vlan, in_xbundle); | |
1155 | ovs_rwlock_unlock(&xbridge->ml->rwlock); | |
1156 | } | |
9583bc14 EJ |
1157 | } |
1158 | ||
46c88433 | 1159 | /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or |
9583bc14 EJ |
1160 | * dropped. Returns true if they may be forwarded, false if they should be |
1161 | * dropped. | |
1162 | * | |
46c88433 | 1163 | * 'in_port' must be the xport that corresponds to flow->in_port. |
9583bc14 EJ |
1164 | * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull). |
1165 | * | |
1166 | * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as | |
1167 | * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as | |
1168 | * checked by input_vid_is_valid(). | |
1169 | * | |
1170 | * May also add tags to '*tags', although the current implementation only does | |
1171 | * so in one special case. | |
1172 | */ | |
1173 | static bool | |
46c88433 | 1174 | is_admissible(struct xlate_ctx *ctx, struct xport *in_port, |
9583bc14 EJ |
1175 | uint16_t vlan) |
1176 | { | |
46c88433 EJ |
1177 | struct xbundle *in_xbundle = in_port->xbundle; |
1178 | const struct xbridge *xbridge = ctx->xbridge; | |
9583bc14 | 1179 | struct flow *flow = &ctx->xin->flow; |
9583bc14 EJ |
1180 | |
1181 | /* Drop frames for reserved multicast addresses | |
1182 | * only if forward_bpdu option is absent. */ | |
46c88433 | 1183 | if (!xbridge->forward_bpdu && eth_addr_is_reserved(flow->dl_dst)) { |
9583bc14 EJ |
1184 | xlate_report(ctx, "packet has reserved destination MAC, dropping"); |
1185 | return false; | |
1186 | } | |
1187 | ||
46c88433 | 1188 | if (in_xbundle->bond) { |
9583bc14 EJ |
1189 | struct mac_entry *mac; |
1190 | ||
46c88433 | 1191 | switch (bond_check_admissibility(in_xbundle->bond, in_port->ofport, |
4a1b8f30 | 1192 | flow->dl_dst)) { |
9583bc14 EJ |
1193 | case BV_ACCEPT: |
1194 | break; | |
1195 | ||
1196 | case BV_DROP: | |
1197 | xlate_report(ctx, "bonding refused admissibility, dropping"); | |
1198 | return false; | |
1199 | ||
1200 | case BV_DROP_IF_MOVED: | |
509c0149 | 1201 | ovs_rwlock_rdlock(&xbridge->ml->rwlock); |
30618594 | 1202 | mac = mac_learning_lookup(xbridge->ml, flow->dl_src, vlan); |
46c88433 | 1203 | if (mac && mac->port.p != in_xbundle->ofbundle && |
9583bc14 EJ |
1204 | (!is_gratuitous_arp(flow, &ctx->xout->wc) |
1205 | || mac_entry_is_grat_arp_locked(mac))) { | |
509c0149 | 1206 | ovs_rwlock_unlock(&xbridge->ml->rwlock); |
9583bc14 EJ |
1207 | xlate_report(ctx, "SLB bond thinks this packet looped back, " |
1208 | "dropping"); | |
1209 | return false; | |
1210 | } | |
509c0149 | 1211 | ovs_rwlock_unlock(&xbridge->ml->rwlock); |
9583bc14 EJ |
1212 | break; |
1213 | } | |
1214 | } | |
1215 | ||
1216 | return true; | |
1217 | } | |
1218 | ||
1219 | static void | |
1220 | xlate_normal(struct xlate_ctx *ctx) | |
1221 | { | |
33bf9176 BP |
1222 | struct flow_wildcards *wc = &ctx->xout->wc; |
1223 | struct flow *flow = &ctx->xin->flow; | |
46c88433 EJ |
1224 | struct xbundle *in_xbundle; |
1225 | struct xport *in_port; | |
9583bc14 | 1226 | struct mac_entry *mac; |
d6d5bbc9 | 1227 | void *mac_port; |
9583bc14 EJ |
1228 | uint16_t vlan; |
1229 | uint16_t vid; | |
1230 | ||
1231 | ctx->xout->has_normal = true; | |
1232 | ||
33bf9176 BP |
1233 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); |
1234 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
1dd35f8a | 1235 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
9583bc14 | 1236 | |
46c88433 EJ |
1237 | in_xbundle = lookup_input_bundle(ctx->xbridge, flow->in_port.ofp_port, |
1238 | ctx->xin->packet != NULL, &in_port); | |
1239 | if (!in_xbundle) { | |
9583bc14 EJ |
1240 | xlate_report(ctx, "no input bundle, dropping"); |
1241 | return; | |
1242 | } | |
1243 | ||
1244 | /* Drop malformed frames. */ | |
33bf9176 BP |
1245 | if (flow->dl_type == htons(ETH_TYPE_VLAN) && |
1246 | !(flow->vlan_tci & htons(VLAN_CFI))) { | |
9583bc14 EJ |
1247 | if (ctx->xin->packet != NULL) { |
1248 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
1249 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet with partial " | |
1250 | "VLAN tag received on port %s", | |
46c88433 | 1251 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 EJ |
1252 | } |
1253 | xlate_report(ctx, "partial VLAN tag, dropping"); | |
1254 | return; | |
1255 | } | |
1256 | ||
1257 | /* Drop frames on bundles reserved for mirroring. */ | |
46c88433 | 1258 | if (xbundle_mirror_out(ctx->xbridge, in_xbundle)) { |
9583bc14 EJ |
1259 | if (ctx->xin->packet != NULL) { |
1260 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
1261 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port " | |
1262 | "%s, which is reserved exclusively for mirroring", | |
46c88433 | 1263 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 EJ |
1264 | } |
1265 | xlate_report(ctx, "input port is mirror output port, dropping"); | |
1266 | return; | |
1267 | } | |
1268 | ||
1269 | /* Check VLAN. */ | |
33bf9176 | 1270 | vid = vlan_tci_to_vid(flow->vlan_tci); |
46c88433 | 1271 | if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) { |
9583bc14 EJ |
1272 | xlate_report(ctx, "disallowed VLAN VID for this input port, dropping"); |
1273 | return; | |
1274 | } | |
46c88433 | 1275 | vlan = input_vid_to_vlan(in_xbundle, vid); |
9583bc14 EJ |
1276 | |
1277 | /* Check other admissibility requirements. */ | |
1278 | if (in_port && !is_admissible(ctx, in_port, vlan)) { | |
1279 | return; | |
1280 | } | |
1281 | ||
1282 | /* Learn source MAC. */ | |
1283 | if (ctx->xin->may_learn) { | |
46c88433 | 1284 | update_learning_table(ctx->xbridge, flow, wc, vlan, in_xbundle); |
9583bc14 EJ |
1285 | } |
1286 | ||
1287 | /* Determine output bundle. */ | |
509c0149 | 1288 | ovs_rwlock_rdlock(&ctx->xbridge->ml->rwlock); |
30618594 | 1289 | mac = mac_learning_lookup(ctx->xbridge->ml, flow->dl_dst, vlan); |
d6d5bbc9 EJ |
1290 | mac_port = mac ? mac->port.p : NULL; |
1291 | ovs_rwlock_unlock(&ctx->xbridge->ml->rwlock); | |
1292 | ||
1293 | if (mac_port) { | |
1294 | struct xbundle *mac_xbundle = xbundle_lookup(mac_port); | |
46c88433 | 1295 | if (mac_xbundle && mac_xbundle != in_xbundle) { |
9583bc14 | 1296 | xlate_report(ctx, "forwarding to learned port"); |
46c88433 EJ |
1297 | output_normal(ctx, mac_xbundle, vlan); |
1298 | } else if (!mac_xbundle) { | |
1299 | xlate_report(ctx, "learned port is unknown, dropping"); | |
9583bc14 EJ |
1300 | } else { |
1301 | xlate_report(ctx, "learned port is input port, dropping"); | |
1302 | } | |
1303 | } else { | |
46c88433 | 1304 | struct xbundle *xbundle; |
9583bc14 EJ |
1305 | |
1306 | xlate_report(ctx, "no learned MAC for destination, flooding"); | |
46c88433 EJ |
1307 | LIST_FOR_EACH (xbundle, list_node, &ctx->xbridge->xbundles) { |
1308 | if (xbundle != in_xbundle | |
1309 | && xbundle_includes_vlan(xbundle, vlan) | |
1310 | && xbundle->floodable | |
1311 | && !xbundle_mirror_out(ctx->xbridge, xbundle)) { | |
1312 | output_normal(ctx, xbundle, vlan); | |
9583bc14 EJ |
1313 | } |
1314 | } | |
1315 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
1316 | } | |
1317 | } | |
1318 | ||
1319 | /* Compose SAMPLE action for sFlow or IPFIX. The given probability is | |
1320 | * the number of packets out of UINT32_MAX to sample. The given | |
1321 | * cookie is passed back in the callback for each sampled packet. | |
1322 | */ | |
1323 | static size_t | |
46c88433 | 1324 | compose_sample_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1325 | struct ofpbuf *odp_actions, |
1326 | const struct flow *flow, | |
1327 | const uint32_t probability, | |
1328 | const union user_action_cookie *cookie, | |
1329 | const size_t cookie_size) | |
1330 | { | |
1331 | size_t sample_offset, actions_offset; | |
89a8a7f0 | 1332 | odp_port_t odp_port; |
9583bc14 | 1333 | int cookie_offset; |
89a8a7f0 | 1334 | uint32_t pid; |
9583bc14 EJ |
1335 | |
1336 | sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE); | |
1337 | ||
1338 | nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability); | |
1339 | ||
1340 | actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS); | |
89a8a7f0 EJ |
1341 | |
1342 | odp_port = ofp_port_to_odp_port(xbridge, flow->in_port.ofp_port); | |
1343 | pid = dpif_port_get_pid(xbridge->dpif, odp_port); | |
1344 | cookie_offset = odp_put_userspace_action(pid, cookie, cookie_size, odp_actions); | |
9583bc14 EJ |
1345 | |
1346 | nl_msg_end_nested(odp_actions, actions_offset); | |
1347 | nl_msg_end_nested(odp_actions, sample_offset); | |
1348 | return cookie_offset; | |
1349 | } | |
1350 | ||
1351 | static void | |
46c88433 EJ |
1352 | compose_sflow_cookie(const struct xbridge *xbridge, ovs_be16 vlan_tci, |
1353 | odp_port_t odp_port, unsigned int n_outputs, | |
1354 | union user_action_cookie *cookie) | |
9583bc14 EJ |
1355 | { |
1356 | int ifindex; | |
1357 | ||
1358 | cookie->type = USER_ACTION_COOKIE_SFLOW; | |
1359 | cookie->sflow.vlan_tci = vlan_tci; | |
1360 | ||
1361 | /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output | |
1362 | * port information") for the interpretation of cookie->output. */ | |
1363 | switch (n_outputs) { | |
1364 | case 0: | |
1365 | /* 0x40000000 | 256 means "packet dropped for unknown reason". */ | |
1366 | cookie->sflow.output = 0x40000000 | 256; | |
1367 | break; | |
1368 | ||
1369 | case 1: | |
46c88433 | 1370 | ifindex = dpif_sflow_odp_port_to_ifindex(xbridge->sflow, odp_port); |
9583bc14 EJ |
1371 | if (ifindex) { |
1372 | cookie->sflow.output = ifindex; | |
1373 | break; | |
1374 | } | |
1375 | /* Fall through. */ | |
1376 | default: | |
1377 | /* 0x80000000 means "multiple output ports. */ | |
1378 | cookie->sflow.output = 0x80000000 | n_outputs; | |
1379 | break; | |
1380 | } | |
1381 | } | |
1382 | ||
1383 | /* Compose SAMPLE action for sFlow bridge sampling. */ | |
1384 | static size_t | |
46c88433 | 1385 | compose_sflow_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1386 | struct ofpbuf *odp_actions, |
1387 | const struct flow *flow, | |
4e022ec0 | 1388 | odp_port_t odp_port) |
9583bc14 EJ |
1389 | { |
1390 | uint32_t probability; | |
1391 | union user_action_cookie cookie; | |
1392 | ||
46c88433 | 1393 | if (!xbridge->sflow || flow->in_port.ofp_port == OFPP_NONE) { |
9583bc14 EJ |
1394 | return 0; |
1395 | } | |
1396 | ||
46c88433 EJ |
1397 | probability = dpif_sflow_get_probability(xbridge->sflow); |
1398 | compose_sflow_cookie(xbridge, htons(0), odp_port, | |
4e022ec0 | 1399 | odp_port == ODPP_NONE ? 0 : 1, &cookie); |
9583bc14 | 1400 | |
46c88433 | 1401 | return compose_sample_action(xbridge, odp_actions, flow, probability, |
9583bc14 EJ |
1402 | &cookie, sizeof cookie.sflow); |
1403 | } | |
1404 | ||
1405 | static void | |
1406 | compose_flow_sample_cookie(uint16_t probability, uint32_t collector_set_id, | |
1407 | uint32_t obs_domain_id, uint32_t obs_point_id, | |
1408 | union user_action_cookie *cookie) | |
1409 | { | |
1410 | cookie->type = USER_ACTION_COOKIE_FLOW_SAMPLE; | |
1411 | cookie->flow_sample.probability = probability; | |
1412 | cookie->flow_sample.collector_set_id = collector_set_id; | |
1413 | cookie->flow_sample.obs_domain_id = obs_domain_id; | |
1414 | cookie->flow_sample.obs_point_id = obs_point_id; | |
1415 | } | |
1416 | ||
1417 | static void | |
1418 | compose_ipfix_cookie(union user_action_cookie *cookie) | |
1419 | { | |
1420 | cookie->type = USER_ACTION_COOKIE_IPFIX; | |
1421 | } | |
1422 | ||
1423 | /* Compose SAMPLE action for IPFIX bridge sampling. */ | |
1424 | static void | |
46c88433 | 1425 | compose_ipfix_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1426 | struct ofpbuf *odp_actions, |
1427 | const struct flow *flow) | |
1428 | { | |
1429 | uint32_t probability; | |
1430 | union user_action_cookie cookie; | |
1431 | ||
46c88433 | 1432 | if (!xbridge->ipfix || flow->in_port.ofp_port == OFPP_NONE) { |
9583bc14 EJ |
1433 | return; |
1434 | } | |
1435 | ||
46c88433 | 1436 | probability = dpif_ipfix_get_bridge_exporter_probability(xbridge->ipfix); |
9583bc14 EJ |
1437 | compose_ipfix_cookie(&cookie); |
1438 | ||
46c88433 | 1439 | compose_sample_action(xbridge, odp_actions, flow, probability, |
9583bc14 EJ |
1440 | &cookie, sizeof cookie.ipfix); |
1441 | } | |
1442 | ||
1443 | /* SAMPLE action for sFlow must be first action in any given list of | |
1444 | * actions. At this point we do not have all information required to | |
1445 | * build it. So try to build sample action as complete as possible. */ | |
1446 | static void | |
1447 | add_sflow_action(struct xlate_ctx *ctx) | |
1448 | { | |
46c88433 | 1449 | ctx->user_cookie_offset = compose_sflow_action(ctx->xbridge, |
9583bc14 | 1450 | &ctx->xout->odp_actions, |
4e022ec0 | 1451 | &ctx->xin->flow, ODPP_NONE); |
9583bc14 EJ |
1452 | ctx->sflow_odp_port = 0; |
1453 | ctx->sflow_n_outputs = 0; | |
1454 | } | |
1455 | ||
1456 | /* SAMPLE action for IPFIX must be 1st or 2nd action in any given list | |
1457 | * of actions, eventually after the SAMPLE action for sFlow. */ | |
1458 | static void | |
1459 | add_ipfix_action(struct xlate_ctx *ctx) | |
1460 | { | |
46c88433 | 1461 | compose_ipfix_action(ctx->xbridge, &ctx->xout->odp_actions, |
9583bc14 EJ |
1462 | &ctx->xin->flow); |
1463 | } | |
1464 | ||
1465 | /* Fix SAMPLE action according to data collected while composing ODP actions. | |
1466 | * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested | |
1467 | * USERSPACE action's user-cookie which is required for sflow. */ | |
1468 | static void | |
1469 | fix_sflow_action(struct xlate_ctx *ctx) | |
1470 | { | |
1471 | const struct flow *base = &ctx->base_flow; | |
1472 | union user_action_cookie *cookie; | |
1473 | ||
1474 | if (!ctx->user_cookie_offset) { | |
1475 | return; | |
1476 | } | |
1477 | ||
1478 | cookie = ofpbuf_at(&ctx->xout->odp_actions, ctx->user_cookie_offset, | |
1479 | sizeof cookie->sflow); | |
1480 | ovs_assert(cookie->type == USER_ACTION_COOKIE_SFLOW); | |
1481 | ||
46c88433 | 1482 | compose_sflow_cookie(ctx->xbridge, base->vlan_tci, |
9583bc14 EJ |
1483 | ctx->sflow_odp_port, ctx->sflow_n_outputs, cookie); |
1484 | } | |
1485 | ||
db7d4e46 | 1486 | static enum slow_path_reason |
642dc74d | 1487 | process_special(struct xlate_ctx *ctx, const struct flow *flow, |
46c88433 | 1488 | const struct xport *xport, const struct ofpbuf *packet) |
db7d4e46 | 1489 | { |
642dc74d | 1490 | struct flow_wildcards *wc = &ctx->xout->wc; |
46c88433 | 1491 | const struct xbridge *xbridge = ctx->xbridge; |
642dc74d | 1492 | |
46c88433 | 1493 | if (!xport) { |
db7d4e46 | 1494 | return 0; |
46c88433 | 1495 | } else if (xport->cfm && cfm_should_process_flow(xport->cfm, flow, wc)) { |
db7d4e46 | 1496 | if (packet) { |
46c88433 | 1497 | cfm_process_heartbeat(xport->cfm, packet); |
db7d4e46 JP |
1498 | } |
1499 | return SLOW_CFM; | |
fab52e16 | 1500 | } else if (xport->bfd && bfd_should_process_flow(xport->bfd, flow, wc)) { |
db7d4e46 | 1501 | if (packet) { |
46c88433 | 1502 | bfd_process_packet(xport->bfd, flow, packet); |
db7d4e46 JP |
1503 | } |
1504 | return SLOW_BFD; | |
46c88433 | 1505 | } else if (xport->xbundle && xport->xbundle->lacp |
db7d4e46 JP |
1506 | && flow->dl_type == htons(ETH_TYPE_LACP)) { |
1507 | if (packet) { | |
46c88433 | 1508 | lacp_process_packet(xport->xbundle->lacp, xport->ofport, packet); |
db7d4e46 JP |
1509 | } |
1510 | return SLOW_LACP; | |
9d189a50 | 1511 | } else if (xbridge->stp && stp_should_process_flow(flow, wc)) { |
db7d4e46 | 1512 | if (packet) { |
9d189a50 | 1513 | stp_process_packet(xport, packet); |
db7d4e46 JP |
1514 | } |
1515 | return SLOW_STP; | |
1516 | } else { | |
1517 | return 0; | |
1518 | } | |
1519 | } | |
1520 | ||
9583bc14 | 1521 | static void |
4e022ec0 | 1522 | compose_output_action__(struct xlate_ctx *ctx, ofp_port_t ofp_port, |
9583bc14 EJ |
1523 | bool check_stp) |
1524 | { | |
46c88433 | 1525 | const struct xport *xport = get_ofp_port(ctx->xbridge, ofp_port); |
1dd35f8a | 1526 | struct flow_wildcards *wc = &ctx->xout->wc; |
33bf9176 | 1527 | struct flow *flow = &ctx->xin->flow; |
9583bc14 | 1528 | ovs_be16 flow_vlan_tci; |
1362e248 | 1529 | uint32_t flow_pkt_mark; |
9583bc14 | 1530 | uint8_t flow_nw_tos; |
4e022ec0 | 1531 | odp_port_t out_port, odp_port; |
ca077186 | 1532 | uint8_t dscp; |
9583bc14 EJ |
1533 | |
1534 | /* If 'struct flow' gets additional metadata, we'll need to zero it out | |
1535 | * before traversing a patch port. */ | |
1536 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 20); | |
1537 | ||
46c88433 | 1538 | if (!xport) { |
9583bc14 EJ |
1539 | xlate_report(ctx, "Nonexistent output port"); |
1540 | return; | |
46c88433 | 1541 | } else if (xport->config & OFPUTIL_PC_NO_FWD) { |
9583bc14 EJ |
1542 | xlate_report(ctx, "OFPPC_NO_FWD set, skipping output"); |
1543 | return; | |
9d189a50 | 1544 | } else if (check_stp && !xport_stp_forward_state(xport)) { |
9583bc14 EJ |
1545 | xlate_report(ctx, "STP not in forwarding state, skipping output"); |
1546 | return; | |
1547 | } | |
1548 | ||
46c88433 EJ |
1549 | if (mbridge_has_mirrors(ctx->xbridge->mbridge) && xport->xbundle) { |
1550 | ctx->xout->mirrors |= xbundle_mirror_dst(xport->xbundle->xbridge, | |
1551 | xport->xbundle); | |
cdf5d3a5 EJ |
1552 | } |
1553 | ||
46c88433 EJ |
1554 | if (xport->peer) { |
1555 | const struct xport *peer = xport->peer; | |
9583bc14 | 1556 | struct flow old_flow = ctx->xin->flow; |
9583bc14 | 1557 | enum slow_path_reason special; |
9583bc14 | 1558 | |
46c88433 EJ |
1559 | ctx->xbridge = peer->xbridge; |
1560 | flow->in_port.ofp_port = peer->ofp_port; | |
33bf9176 BP |
1561 | flow->metadata = htonll(0); |
1562 | memset(&flow->tunnel, 0, sizeof flow->tunnel); | |
1563 | memset(flow->regs, 0, sizeof flow->regs); | |
9583bc14 | 1564 | |
642dc74d | 1565 | special = process_special(ctx, &ctx->xin->flow, peer, |
9583bc14 EJ |
1566 | ctx->xin->packet); |
1567 | if (special) { | |
1568 | ctx->xout->slow = special; | |
ddd3c975 | 1569 | } else if (may_receive(peer, ctx)) { |
9d189a50 | 1570 | if (xport_stp_forward_state(peer)) { |
4e022ec0 | 1571 | xlate_table_action(ctx, flow->in_port.ofp_port, 0, true); |
9583bc14 EJ |
1572 | } else { |
1573 | /* Forwarding is disabled by STP. Let OFPP_NORMAL and the | |
1574 | * learning action look at the packet, then drop it. */ | |
1575 | struct flow old_base_flow = ctx->base_flow; | |
1576 | size_t old_size = ctx->xout->odp_actions.size; | |
cdf5d3a5 | 1577 | mirror_mask_t old_mirrors = ctx->xout->mirrors; |
4e022ec0 | 1578 | xlate_table_action(ctx, flow->in_port.ofp_port, 0, true); |
cdf5d3a5 | 1579 | ctx->xout->mirrors = old_mirrors; |
9583bc14 EJ |
1580 | ctx->base_flow = old_base_flow; |
1581 | ctx->xout->odp_actions.size = old_size; | |
1582 | } | |
1583 | } | |
1584 | ||
1585 | ctx->xin->flow = old_flow; | |
832554e3 | 1586 | ctx->xbridge = xport->xbridge; |
9583bc14 EJ |
1587 | |
1588 | if (ctx->xin->resubmit_stats) { | |
46c88433 EJ |
1589 | netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats); |
1590 | netdev_vport_inc_rx(peer->netdev, ctx->xin->resubmit_stats); | |
9583bc14 EJ |
1591 | } |
1592 | ||
1593 | return; | |
1594 | } | |
1595 | ||
33bf9176 | 1596 | flow_vlan_tci = flow->vlan_tci; |
1362e248 | 1597 | flow_pkt_mark = flow->pkt_mark; |
33bf9176 | 1598 | flow_nw_tos = flow->nw_tos; |
9583bc14 | 1599 | |
55954f6e | 1600 | if (dscp_from_skb_priority(xport, flow->skb_priority, &dscp)) { |
1dd35f8a | 1601 | wc->masks.nw_tos |= IP_ECN_MASK; |
33bf9176 | 1602 | flow->nw_tos &= ~IP_DSCP_MASK; |
ca077186 | 1603 | flow->nw_tos |= dscp; |
9583bc14 EJ |
1604 | } |
1605 | ||
46c88433 | 1606 | if (xport->is_tunnel) { |
9583bc14 EJ |
1607 | /* Save tunnel metadata so that changes made due to |
1608 | * the Logical (tunnel) Port are not visible for any further | |
1609 | * matches, while explicit set actions on tunnel metadata are. | |
1610 | */ | |
33bf9176 | 1611 | struct flow_tnl flow_tnl = flow->tunnel; |
46c88433 | 1612 | odp_port = tnl_port_send(xport->ofport, flow, &ctx->xout->wc); |
4e022ec0 | 1613 | if (odp_port == ODPP_NONE) { |
9583bc14 EJ |
1614 | xlate_report(ctx, "Tunneling decided against output"); |
1615 | goto out; /* restore flow_nw_tos */ | |
1616 | } | |
33bf9176 | 1617 | if (flow->tunnel.ip_dst == ctx->orig_tunnel_ip_dst) { |
9583bc14 EJ |
1618 | xlate_report(ctx, "Not tunneling to our own address"); |
1619 | goto out; /* restore flow_nw_tos */ | |
1620 | } | |
1621 | if (ctx->xin->resubmit_stats) { | |
46c88433 | 1622 | netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats); |
9583bc14 EJ |
1623 | } |
1624 | out_port = odp_port; | |
33bf9176 | 1625 | commit_odp_tunnel_action(flow, &ctx->base_flow, |
9583bc14 | 1626 | &ctx->xout->odp_actions); |
33bf9176 | 1627 | flow->tunnel = flow_tnl; /* Restore tunnel metadata */ |
9583bc14 | 1628 | } else { |
4e022ec0 | 1629 | ofp_port_t vlandev_port; |
1dd35f8a | 1630 | |
46c88433 EJ |
1631 | odp_port = xport->odp_port; |
1632 | if (ofproto_has_vlan_splinters(ctx->xbridge->ofproto)) { | |
1dd35f8a JP |
1633 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
1634 | } | |
46c88433 | 1635 | vlandev_port = vsp_realdev_to_vlandev(ctx->xbridge->ofproto, ofp_port, |
33bf9176 | 1636 | flow->vlan_tci); |
9583bc14 EJ |
1637 | if (vlandev_port == ofp_port) { |
1638 | out_port = odp_port; | |
1639 | } else { | |
46c88433 | 1640 | out_port = ofp_port_to_odp_port(ctx->xbridge, vlandev_port); |
33bf9176 | 1641 | flow->vlan_tci = htons(0); |
9583bc14 | 1642 | } |
9583bc14 | 1643 | } |
9583bc14 | 1644 | |
4e022ec0 | 1645 | if (out_port != ODPP_NONE) { |
1dd35f8a JP |
1646 | commit_odp_actions(flow, &ctx->base_flow, |
1647 | &ctx->xout->odp_actions, &ctx->xout->wc); | |
4e022ec0 AW |
1648 | nl_msg_put_odp_port(&ctx->xout->odp_actions, OVS_ACTION_ATTR_OUTPUT, |
1649 | out_port); | |
9583bc14 | 1650 | |
6cbbf4fa EJ |
1651 | ctx->sflow_odp_port = odp_port; |
1652 | ctx->sflow_n_outputs++; | |
1653 | ctx->xout->nf_output_iface = ofp_port; | |
1654 | } | |
1655 | ||
1656 | out: | |
9583bc14 | 1657 | /* Restore flow */ |
33bf9176 | 1658 | flow->vlan_tci = flow_vlan_tci; |
1362e248 | 1659 | flow->pkt_mark = flow_pkt_mark; |
33bf9176 | 1660 | flow->nw_tos = flow_nw_tos; |
9583bc14 EJ |
1661 | } |
1662 | ||
1663 | static void | |
4e022ec0 | 1664 | compose_output_action(struct xlate_ctx *ctx, ofp_port_t ofp_port) |
9583bc14 EJ |
1665 | { |
1666 | compose_output_action__(ctx, ofp_port, true); | |
1667 | } | |
1668 | ||
bb61b33d BP |
1669 | static void |
1670 | xlate_recursively(struct xlate_ctx *ctx, struct rule_dpif *rule) | |
70742c7f | 1671 | OVS_RELEASES(rule) |
bb61b33d BP |
1672 | { |
1673 | struct rule_dpif *old_rule = ctx->rule; | |
70742c7f EJ |
1674 | const struct ofpact *ofpacts; |
1675 | size_t ofpacts_len; | |
bb61b33d BP |
1676 | |
1677 | if (ctx->xin->resubmit_stats) { | |
70742c7f | 1678 | rule_dpif_credit_stats(rule, ctx->xin->resubmit_stats); |
bb61b33d BP |
1679 | } |
1680 | ||
1681 | ctx->recurse++; | |
1682 | ctx->rule = rule; | |
70742c7f EJ |
1683 | rule_dpif_get_actions(rule, &ofpacts, &ofpacts_len); |
1684 | do_xlate_actions(ofpacts, ofpacts_len, ctx); | |
bb61b33d BP |
1685 | ctx->rule = old_rule; |
1686 | ctx->recurse--; | |
1687 | ||
70742c7f | 1688 | rule_dpif_release(rule); |
bb61b33d BP |
1689 | } |
1690 | ||
9583bc14 EJ |
1691 | static void |
1692 | xlate_table_action(struct xlate_ctx *ctx, | |
4e022ec0 | 1693 | ofp_port_t in_port, uint8_t table_id, bool may_packet_in) |
9583bc14 EJ |
1694 | { |
1695 | if (ctx->recurse < MAX_RESUBMIT_RECURSION) { | |
1696 | struct rule_dpif *rule; | |
4e022ec0 | 1697 | ofp_port_t old_in_port = ctx->xin->flow.in_port.ofp_port; |
9583bc14 | 1698 | uint8_t old_table_id = ctx->table_id; |
bb61b33d | 1699 | bool got_rule; |
9583bc14 EJ |
1700 | |
1701 | ctx->table_id = table_id; | |
1702 | ||
bb61b33d BP |
1703 | /* Look up a flow with 'in_port' as the input port. Then restore the |
1704 | * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will | |
1705 | * have surprising behavior). */ | |
4e022ec0 | 1706 | ctx->xin->flow.in_port.ofp_port = in_port; |
bb61b33d BP |
1707 | got_rule = rule_dpif_lookup_in_table(ctx->xbridge->ofproto, |
1708 | &ctx->xin->flow, &ctx->xout->wc, | |
1709 | table_id, &rule); | |
4e022ec0 | 1710 | ctx->xin->flow.in_port.ofp_port = old_in_port; |
9583bc14 | 1711 | |
ad3efdcb EJ |
1712 | if (ctx->xin->resubmit_hook) { |
1713 | ctx->xin->resubmit_hook(ctx->xin, rule, ctx->recurse); | |
1714 | } | |
1715 | ||
bb61b33d BP |
1716 | if (got_rule) { |
1717 | xlate_recursively(ctx, rule); | |
1718 | } else if (may_packet_in) { | |
ad3efdcb EJ |
1719 | struct xport *xport; |
1720 | ||
ad3efdcb EJ |
1721 | /* XXX |
1722 | * check if table configuration flags | |
1723 | * OFPTC_TABLE_MISS_CONTROLLER, default. | |
1724 | * OFPTC_TABLE_MISS_CONTINUE, | |
1725 | * OFPTC_TABLE_MISS_DROP | |
1726 | * When OF1.0, OFPTC_TABLE_MISS_CONTINUE is used. What to do? */ | |
1727 | xport = get_ofp_port(ctx->xbridge, ctx->xin->flow.in_port.ofp_port); | |
70742c7f EJ |
1728 | choose_miss_rule(xport ? xport->config : 0, |
1729 | ctx->xbridge->miss_rule, | |
1730 | ctx->xbridge->no_packet_in_rule, &rule); | |
bb61b33d | 1731 | xlate_recursively(ctx, rule); |
ad3efdcb EJ |
1732 | } |
1733 | ||
9583bc14 EJ |
1734 | ctx->table_id = old_table_id; |
1735 | } else { | |
1736 | static struct vlog_rate_limit recurse_rl = VLOG_RATE_LIMIT_INIT(1, 1); | |
1737 | ||
1738 | VLOG_ERR_RL(&recurse_rl, "resubmit actions recursed over %d times", | |
1739 | MAX_RESUBMIT_RECURSION); | |
9583bc14 EJ |
1740 | } |
1741 | } | |
1742 | ||
1743 | static void | |
1744 | xlate_ofpact_resubmit(struct xlate_ctx *ctx, | |
1745 | const struct ofpact_resubmit *resubmit) | |
1746 | { | |
4e022ec0 | 1747 | ofp_port_t in_port; |
9583bc14 EJ |
1748 | uint8_t table_id; |
1749 | ||
1750 | in_port = resubmit->in_port; | |
1751 | if (in_port == OFPP_IN_PORT) { | |
4e022ec0 | 1752 | in_port = ctx->xin->flow.in_port.ofp_port; |
9583bc14 EJ |
1753 | } |
1754 | ||
1755 | table_id = resubmit->table_id; | |
1756 | if (table_id == 255) { | |
1757 | table_id = ctx->table_id; | |
1758 | } | |
1759 | ||
1760 | xlate_table_action(ctx, in_port, table_id, false); | |
1761 | } | |
1762 | ||
1763 | static void | |
1764 | flood_packets(struct xlate_ctx *ctx, bool all) | |
1765 | { | |
46c88433 | 1766 | const struct xport *xport; |
9583bc14 | 1767 | |
46c88433 EJ |
1768 | HMAP_FOR_EACH (xport, ofp_node, &ctx->xbridge->xports) { |
1769 | if (xport->ofp_port == ctx->xin->flow.in_port.ofp_port) { | |
9583bc14 EJ |
1770 | continue; |
1771 | } | |
1772 | ||
1773 | if (all) { | |
46c88433 EJ |
1774 | compose_output_action__(ctx, xport->ofp_port, false); |
1775 | } else if (!(xport->config & OFPUTIL_PC_NO_FLOOD)) { | |
1776 | compose_output_action(ctx, xport->ofp_port); | |
9583bc14 EJ |
1777 | } |
1778 | } | |
1779 | ||
1780 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
1781 | } | |
1782 | ||
1783 | static void | |
1784 | execute_controller_action(struct xlate_ctx *ctx, int len, | |
1785 | enum ofp_packet_in_reason reason, | |
1786 | uint16_t controller_id) | |
1787 | { | |
ada3a58d | 1788 | struct ofputil_packet_in *pin; |
9583bc14 EJ |
1789 | struct ofpbuf *packet; |
1790 | struct flow key; | |
1791 | ||
1792 | ovs_assert(!ctx->xout->slow || ctx->xout->slow == SLOW_CONTROLLER); | |
1793 | ctx->xout->slow = SLOW_CONTROLLER; | |
1794 | if (!ctx->xin->packet) { | |
1795 | return; | |
1796 | } | |
1797 | ||
1798 | packet = ofpbuf_clone(ctx->xin->packet); | |
1799 | ||
1800 | key.skb_priority = 0; | |
1362e248 | 1801 | key.pkt_mark = 0; |
9583bc14 EJ |
1802 | memset(&key.tunnel, 0, sizeof key.tunnel); |
1803 | ||
1804 | commit_odp_actions(&ctx->xin->flow, &ctx->base_flow, | |
1dd35f8a | 1805 | &ctx->xout->odp_actions, &ctx->xout->wc); |
9583bc14 EJ |
1806 | |
1807 | odp_execute_actions(NULL, packet, &key, ctx->xout->odp_actions.data, | |
1808 | ctx->xout->odp_actions.size, NULL, NULL); | |
1809 | ||
ada3a58d EJ |
1810 | pin = xmalloc(sizeof *pin); |
1811 | pin->packet_len = packet->size; | |
1812 | pin->packet = ofpbuf_steal_data(packet); | |
1813 | pin->reason = reason; | |
1814 | pin->controller_id = controller_id; | |
1815 | pin->table_id = ctx->table_id; | |
70742c7f | 1816 | pin->cookie = ctx->rule ? rule_dpif_get_flow_cookie(ctx->rule) : 0; |
9583bc14 | 1817 | |
ada3a58d EJ |
1818 | pin->send_len = len; |
1819 | flow_get_metadata(&ctx->xin->flow, &pin->fmd); | |
9583bc14 | 1820 | |
ada3a58d | 1821 | ofproto_dpif_send_packet_in(ctx->xbridge->ofproto, pin); |
9583bc14 EJ |
1822 | ofpbuf_delete(packet); |
1823 | } | |
1824 | ||
1825 | static void | |
9cfef3d0 | 1826 | compose_mpls_push_action(struct xlate_ctx *ctx, ovs_be16 eth_type) |
9583bc14 | 1827 | { |
33bf9176 BP |
1828 | struct flow_wildcards *wc = &ctx->xout->wc; |
1829 | struct flow *flow = &ctx->xin->flow; | |
1830 | ||
9583bc14 EJ |
1831 | ovs_assert(eth_type_mpls(eth_type)); |
1832 | ||
33bf9176 BP |
1833 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
1834 | memset(&wc->masks.mpls_depth, 0xff, sizeof wc->masks.mpls_depth); | |
9583bc14 | 1835 | |
33bf9176 BP |
1836 | if (flow->mpls_depth) { |
1837 | flow->mpls_lse &= ~htonl(MPLS_BOS_MASK); | |
1838 | flow->mpls_depth++; | |
9583bc14 EJ |
1839 | } else { |
1840 | ovs_be32 label; | |
1841 | uint8_t tc, ttl; | |
1842 | ||
33bf9176 | 1843 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
9583bc14 EJ |
1844 | label = htonl(0x2); /* IPV6 Explicit Null. */ |
1845 | } else { | |
1846 | label = htonl(0x0); /* IPV4 Explicit Null. */ | |
1847 | } | |
1dd35f8a JP |
1848 | wc->masks.nw_tos |= IP_DSCP_MASK; |
1849 | wc->masks.nw_ttl = 0xff; | |
33bf9176 BP |
1850 | tc = (flow->nw_tos & IP_DSCP_MASK) >> 2; |
1851 | ttl = flow->nw_ttl ? flow->nw_ttl : 0x40; | |
1852 | flow->mpls_lse = set_mpls_lse_values(ttl, tc, 1, label); | |
1853 | flow->mpls_depth = 1; | |
9583bc14 | 1854 | } |
33bf9176 | 1855 | flow->dl_type = eth_type; |
9583bc14 EJ |
1856 | } |
1857 | ||
1858 | static void | |
9cfef3d0 | 1859 | compose_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type) |
9583bc14 | 1860 | { |
33bf9176 BP |
1861 | struct flow_wildcards *wc = &ctx->xout->wc; |
1862 | struct flow *flow = &ctx->xin->flow; | |
1863 | ||
9583bc14 EJ |
1864 | ovs_assert(eth_type_mpls(ctx->xin->flow.dl_type)); |
1865 | ovs_assert(!eth_type_mpls(eth_type)); | |
1866 | ||
33bf9176 BP |
1867 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
1868 | memset(&wc->masks.mpls_depth, 0xff, sizeof wc->masks.mpls_depth); | |
1869 | ||
1870 | if (flow->mpls_depth) { | |
1871 | flow->mpls_depth--; | |
1872 | flow->mpls_lse = htonl(0); | |
1873 | if (!flow->mpls_depth) { | |
1874 | flow->dl_type = eth_type; | |
9583bc14 EJ |
1875 | } |
1876 | } | |
1877 | } | |
1878 | ||
1879 | static bool | |
1880 | compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids) | |
1881 | { | |
33bf9176 BP |
1882 | struct flow *flow = &ctx->xin->flow; |
1883 | ||
1884 | if (!is_ip_any(flow)) { | |
9583bc14 EJ |
1885 | return false; |
1886 | } | |
1887 | ||
1dd35f8a | 1888 | ctx->xout->wc.masks.nw_ttl = 0xff; |
33bf9176 BP |
1889 | if (flow->nw_ttl > 1) { |
1890 | flow->nw_ttl--; | |
9583bc14 EJ |
1891 | return false; |
1892 | } else { | |
1893 | size_t i; | |
1894 | ||
1895 | for (i = 0; i < ids->n_controllers; i++) { | |
1896 | execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, | |
1897 | ids->cnt_ids[i]); | |
1898 | } | |
1899 | ||
1900 | /* Stop processing for current table. */ | |
1901 | return true; | |
1902 | } | |
1903 | } | |
1904 | ||
1905 | static bool | |
9cfef3d0 | 1906 | compose_set_mpls_ttl_action(struct xlate_ctx *ctx, uint8_t ttl) |
9583bc14 EJ |
1907 | { |
1908 | if (!eth_type_mpls(ctx->xin->flow.dl_type)) { | |
1909 | return true; | |
1910 | } | |
1911 | ||
f74e7df7 | 1912 | ctx->xout->wc.masks.mpls_lse |= htonl(MPLS_TTL_MASK); |
9583bc14 EJ |
1913 | set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse, ttl); |
1914 | return false; | |
1915 | } | |
1916 | ||
1917 | static bool | |
9cfef3d0 | 1918 | compose_dec_mpls_ttl_action(struct xlate_ctx *ctx) |
9583bc14 | 1919 | { |
33bf9176 BP |
1920 | struct flow *flow = &ctx->xin->flow; |
1921 | uint8_t ttl = mpls_lse_to_ttl(flow->mpls_lse); | |
1dd35f8a JP |
1922 | struct flow_wildcards *wc = &ctx->xout->wc; |
1923 | ||
1dd35f8a | 1924 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
9583bc14 | 1925 | |
33bf9176 | 1926 | if (!eth_type_mpls(flow->dl_type)) { |
9583bc14 EJ |
1927 | return false; |
1928 | } | |
1929 | ||
1930 | if (ttl > 1) { | |
1931 | ttl--; | |
33bf9176 | 1932 | set_mpls_lse_ttl(&flow->mpls_lse, ttl); |
9583bc14 EJ |
1933 | return false; |
1934 | } else { | |
1935 | execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, 0); | |
1936 | ||
1937 | /* Stop processing for current table. */ | |
1938 | return true; | |
1939 | } | |
1940 | } | |
1941 | ||
1942 | static void | |
1943 | xlate_output_action(struct xlate_ctx *ctx, | |
4e022ec0 | 1944 | ofp_port_t port, uint16_t max_len, bool may_packet_in) |
9583bc14 | 1945 | { |
4e022ec0 | 1946 | ofp_port_t prev_nf_output_iface = ctx->xout->nf_output_iface; |
9583bc14 EJ |
1947 | |
1948 | ctx->xout->nf_output_iface = NF_OUT_DROP; | |
1949 | ||
1950 | switch (port) { | |
1951 | case OFPP_IN_PORT: | |
4e022ec0 | 1952 | compose_output_action(ctx, ctx->xin->flow.in_port.ofp_port); |
9583bc14 EJ |
1953 | break; |
1954 | case OFPP_TABLE: | |
4e022ec0 AW |
1955 | xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port, |
1956 | 0, may_packet_in); | |
9583bc14 EJ |
1957 | break; |
1958 | case OFPP_NORMAL: | |
1959 | xlate_normal(ctx); | |
1960 | break; | |
1961 | case OFPP_FLOOD: | |
1962 | flood_packets(ctx, false); | |
1963 | break; | |
1964 | case OFPP_ALL: | |
1965 | flood_packets(ctx, true); | |
1966 | break; | |
1967 | case OFPP_CONTROLLER: | |
1968 | execute_controller_action(ctx, max_len, OFPR_ACTION, 0); | |
1969 | break; | |
1970 | case OFPP_NONE: | |
1971 | break; | |
1972 | case OFPP_LOCAL: | |
1973 | default: | |
4e022ec0 | 1974 | if (port != ctx->xin->flow.in_port.ofp_port) { |
9583bc14 EJ |
1975 | compose_output_action(ctx, port); |
1976 | } else { | |
1977 | xlate_report(ctx, "skipping output to input port"); | |
1978 | } | |
1979 | break; | |
1980 | } | |
1981 | ||
1982 | if (prev_nf_output_iface == NF_OUT_FLOOD) { | |
1983 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
1984 | } else if (ctx->xout->nf_output_iface == NF_OUT_DROP) { | |
1985 | ctx->xout->nf_output_iface = prev_nf_output_iface; | |
1986 | } else if (prev_nf_output_iface != NF_OUT_DROP && | |
1987 | ctx->xout->nf_output_iface != NF_OUT_FLOOD) { | |
1988 | ctx->xout->nf_output_iface = NF_OUT_MULTI; | |
1989 | } | |
1990 | } | |
1991 | ||
1992 | static void | |
1993 | xlate_output_reg_action(struct xlate_ctx *ctx, | |
1994 | const struct ofpact_output_reg *or) | |
1995 | { | |
1996 | uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow); | |
1997 | if (port <= UINT16_MAX) { | |
1998 | union mf_subvalue value; | |
1999 | ||
2000 | memset(&value, 0xff, sizeof value); | |
2001 | mf_write_subfield_flow(&or->src, &value, &ctx->xout->wc.masks); | |
4e022ec0 AW |
2002 | xlate_output_action(ctx, u16_to_ofp(port), |
2003 | or->max_len, false); | |
9583bc14 EJ |
2004 | } |
2005 | } | |
2006 | ||
2007 | static void | |
2008 | xlate_enqueue_action(struct xlate_ctx *ctx, | |
2009 | const struct ofpact_enqueue *enqueue) | |
2010 | { | |
4e022ec0 | 2011 | ofp_port_t ofp_port = enqueue->port; |
9583bc14 EJ |
2012 | uint32_t queue_id = enqueue->queue; |
2013 | uint32_t flow_priority, priority; | |
2014 | int error; | |
2015 | ||
2016 | /* Translate queue to priority. */ | |
89a8a7f0 | 2017 | error = dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &priority); |
9583bc14 EJ |
2018 | if (error) { |
2019 | /* Fall back to ordinary output action. */ | |
2020 | xlate_output_action(ctx, enqueue->port, 0, false); | |
2021 | return; | |
2022 | } | |
2023 | ||
2024 | /* Check output port. */ | |
2025 | if (ofp_port == OFPP_IN_PORT) { | |
4e022ec0 AW |
2026 | ofp_port = ctx->xin->flow.in_port.ofp_port; |
2027 | } else if (ofp_port == ctx->xin->flow.in_port.ofp_port) { | |
9583bc14 EJ |
2028 | return; |
2029 | } | |
2030 | ||
2031 | /* Add datapath actions. */ | |
2032 | flow_priority = ctx->xin->flow.skb_priority; | |
2033 | ctx->xin->flow.skb_priority = priority; | |
2034 | compose_output_action(ctx, ofp_port); | |
2035 | ctx->xin->flow.skb_priority = flow_priority; | |
2036 | ||
2037 | /* Update NetFlow output port. */ | |
2038 | if (ctx->xout->nf_output_iface == NF_OUT_DROP) { | |
2039 | ctx->xout->nf_output_iface = ofp_port; | |
2040 | } else if (ctx->xout->nf_output_iface != NF_OUT_FLOOD) { | |
2041 | ctx->xout->nf_output_iface = NF_OUT_MULTI; | |
2042 | } | |
2043 | } | |
2044 | ||
2045 | static void | |
2046 | xlate_set_queue_action(struct xlate_ctx *ctx, uint32_t queue_id) | |
2047 | { | |
2048 | uint32_t skb_priority; | |
2049 | ||
89a8a7f0 | 2050 | if (!dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &skb_priority)) { |
9583bc14 EJ |
2051 | ctx->xin->flow.skb_priority = skb_priority; |
2052 | } else { | |
2053 | /* Couldn't translate queue to a priority. Nothing to do. A warning | |
2054 | * has already been logged. */ | |
2055 | } | |
2056 | } | |
2057 | ||
2058 | static bool | |
46c88433 | 2059 | slave_enabled_cb(ofp_port_t ofp_port, void *xbridge_) |
9583bc14 | 2060 | { |
46c88433 EJ |
2061 | const struct xbridge *xbridge = xbridge_; |
2062 | struct xport *port; | |
9583bc14 EJ |
2063 | |
2064 | switch (ofp_port) { | |
2065 | case OFPP_IN_PORT: | |
2066 | case OFPP_TABLE: | |
2067 | case OFPP_NORMAL: | |
2068 | case OFPP_FLOOD: | |
2069 | case OFPP_ALL: | |
2070 | case OFPP_NONE: | |
2071 | return true; | |
2072 | case OFPP_CONTROLLER: /* Not supported by the bundle action. */ | |
2073 | return false; | |
2074 | default: | |
46c88433 | 2075 | port = get_ofp_port(xbridge, ofp_port); |
9583bc14 EJ |
2076 | return port ? port->may_enable : false; |
2077 | } | |
2078 | } | |
2079 | ||
2080 | static void | |
2081 | xlate_bundle_action(struct xlate_ctx *ctx, | |
2082 | const struct ofpact_bundle *bundle) | |
2083 | { | |
4e022ec0 | 2084 | ofp_port_t port; |
9583bc14 EJ |
2085 | |
2086 | port = bundle_execute(bundle, &ctx->xin->flow, &ctx->xout->wc, | |
46c88433 EJ |
2087 | slave_enabled_cb, |
2088 | CONST_CAST(struct xbridge *, ctx->xbridge)); | |
9583bc14 | 2089 | if (bundle->dst.field) { |
f74e7df7 JP |
2090 | nxm_reg_load(&bundle->dst, ofp_to_u16(port), &ctx->xin->flow, |
2091 | &ctx->xout->wc); | |
9583bc14 EJ |
2092 | } else { |
2093 | xlate_output_action(ctx, port, 0, false); | |
2094 | } | |
2095 | } | |
2096 | ||
2097 | static void | |
2098 | xlate_learn_action(struct xlate_ctx *ctx, | |
2099 | const struct ofpact_learn *learn) | |
2100 | { | |
3d9c5e58 | 2101 | struct ofputil_flow_mod *fm; |
9583bc14 | 2102 | struct ofpbuf ofpacts; |
9583bc14 EJ |
2103 | |
2104 | ctx->xout->has_learn = true; | |
2105 | ||
2106 | learn_mask(learn, &ctx->xout->wc); | |
2107 | ||
2108 | if (!ctx->xin->may_learn) { | |
2109 | return; | |
2110 | } | |
2111 | ||
3d9c5e58 EJ |
2112 | fm = xmalloc(sizeof *fm); |
2113 | ofpbuf_init(&ofpacts, 0); | |
2114 | learn_execute(learn, &ctx->xin->flow, fm, &ofpacts); | |
9583bc14 | 2115 | |
3d9c5e58 | 2116 | ofproto_dpif_flow_mod(ctx->xbridge->ofproto, fm); |
9583bc14 EJ |
2117 | } |
2118 | ||
9583bc14 EJ |
2119 | static void |
2120 | xlate_fin_timeout(struct xlate_ctx *ctx, | |
2121 | const struct ofpact_fin_timeout *oft) | |
2122 | { | |
2123 | if (ctx->xin->tcp_flags & (TCP_FIN | TCP_RST) && ctx->rule) { | |
70742c7f EJ |
2124 | rule_dpif_reduce_timeouts(ctx->rule, oft->fin_idle_timeout, |
2125 | oft->fin_hard_timeout); | |
9583bc14 EJ |
2126 | } |
2127 | } | |
2128 | ||
2129 | static void | |
2130 | xlate_sample_action(struct xlate_ctx *ctx, | |
2131 | const struct ofpact_sample *os) | |
2132 | { | |
2133 | union user_action_cookie cookie; | |
2134 | /* Scale the probability from 16-bit to 32-bit while representing | |
2135 | * the same percentage. */ | |
2136 | uint32_t probability = (os->probability << 16) | os->probability; | |
2137 | ||
2138 | commit_odp_actions(&ctx->xin->flow, &ctx->base_flow, | |
1dd35f8a | 2139 | &ctx->xout->odp_actions, &ctx->xout->wc); |
9583bc14 EJ |
2140 | |
2141 | compose_flow_sample_cookie(os->probability, os->collector_set_id, | |
2142 | os->obs_domain_id, os->obs_point_id, &cookie); | |
46c88433 | 2143 | compose_sample_action(ctx->xbridge, &ctx->xout->odp_actions, &ctx->xin->flow, |
9583bc14 EJ |
2144 | probability, &cookie, sizeof cookie.flow_sample); |
2145 | } | |
2146 | ||
2147 | static bool | |
46c88433 | 2148 | may_receive(const struct xport *xport, struct xlate_ctx *ctx) |
9583bc14 | 2149 | { |
46c88433 EJ |
2150 | if (xport->config & (eth_addr_equals(ctx->xin->flow.dl_dst, eth_addr_stp) |
2151 | ? OFPUTIL_PC_NO_RECV_STP | |
2152 | : OFPUTIL_PC_NO_RECV)) { | |
9583bc14 EJ |
2153 | return false; |
2154 | } | |
2155 | ||
2156 | /* Only drop packets here if both forwarding and learning are | |
2157 | * disabled. If just learning is enabled, we need to have | |
2158 | * OFPP_NORMAL and the learning action have a look at the packet | |
2159 | * before we can drop it. */ | |
9d189a50 | 2160 | if (!xport_stp_forward_state(xport) && !xport_stp_learn_state(xport)) { |
9583bc14 EJ |
2161 | return false; |
2162 | } | |
2163 | ||
2164 | return true; | |
2165 | } | |
2166 | ||
9583bc14 EJ |
2167 | static void |
2168 | do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len, | |
2169 | struct xlate_ctx *ctx) | |
2170 | { | |
33bf9176 BP |
2171 | struct flow_wildcards *wc = &ctx->xout->wc; |
2172 | struct flow *flow = &ctx->xin->flow; | |
9583bc14 EJ |
2173 | const struct ofpact *a; |
2174 | ||
9583bc14 EJ |
2175 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { |
2176 | struct ofpact_controller *controller; | |
2177 | const struct ofpact_metadata *metadata; | |
2178 | ||
2179 | if (ctx->exit) { | |
2180 | break; | |
2181 | } | |
2182 | ||
2183 | switch (a->type) { | |
2184 | case OFPACT_OUTPUT: | |
2185 | xlate_output_action(ctx, ofpact_get_OUTPUT(a)->port, | |
2186 | ofpact_get_OUTPUT(a)->max_len, true); | |
2187 | break; | |
2188 | ||
7395c052 NZ |
2189 | case OFPACT_GROUP: |
2190 | /* XXX not yet implemented */ | |
2191 | break; | |
2192 | ||
9583bc14 EJ |
2193 | case OFPACT_CONTROLLER: |
2194 | controller = ofpact_get_CONTROLLER(a); | |
2195 | execute_controller_action(ctx, controller->max_len, | |
2196 | controller->reason, | |
2197 | controller->controller_id); | |
2198 | break; | |
2199 | ||
2200 | case OFPACT_ENQUEUE: | |
2201 | xlate_enqueue_action(ctx, ofpact_get_ENQUEUE(a)); | |
2202 | break; | |
2203 | ||
2204 | case OFPACT_SET_VLAN_VID: | |
f74e7df7 | 2205 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
33bf9176 BP |
2206 | flow->vlan_tci &= ~htons(VLAN_VID_MASK); |
2207 | flow->vlan_tci |= (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid) | |
2208 | | htons(VLAN_CFI)); | |
9583bc14 EJ |
2209 | break; |
2210 | ||
2211 | case OFPACT_SET_VLAN_PCP: | |
f74e7df7 | 2212 | wc->masks.vlan_tci |= htons(VLAN_PCP_MASK | VLAN_CFI); |
33bf9176 BP |
2213 | flow->vlan_tci &= ~htons(VLAN_PCP_MASK); |
2214 | flow->vlan_tci |= | |
9583bc14 EJ |
2215 | htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp << VLAN_PCP_SHIFT) |
2216 | | VLAN_CFI); | |
2217 | break; | |
2218 | ||
2219 | case OFPACT_STRIP_VLAN: | |
f74e7df7 | 2220 | memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci); |
33bf9176 | 2221 | flow->vlan_tci = htons(0); |
9583bc14 EJ |
2222 | break; |
2223 | ||
2224 | case OFPACT_PUSH_VLAN: | |
2225 | /* XXX 802.1AD(QinQ) */ | |
f74e7df7 | 2226 | memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci); |
33bf9176 | 2227 | flow->vlan_tci = htons(VLAN_CFI); |
9583bc14 EJ |
2228 | break; |
2229 | ||
2230 | case OFPACT_SET_ETH_SRC: | |
f74e7df7 | 2231 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); |
33bf9176 | 2232 | memcpy(flow->dl_src, ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN); |
9583bc14 EJ |
2233 | break; |
2234 | ||
2235 | case OFPACT_SET_ETH_DST: | |
f74e7df7 | 2236 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); |
33bf9176 | 2237 | memcpy(flow->dl_dst, ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN); |
9583bc14 EJ |
2238 | break; |
2239 | ||
2240 | case OFPACT_SET_IPV4_SRC: | |
f74e7df7 | 2241 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); |
33bf9176 BP |
2242 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
2243 | flow->nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4; | |
9583bc14 EJ |
2244 | } |
2245 | break; | |
2246 | ||
2247 | case OFPACT_SET_IPV4_DST: | |
f74e7df7 | 2248 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); |
33bf9176 BP |
2249 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
2250 | flow->nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4; | |
9583bc14 EJ |
2251 | } |
2252 | break; | |
2253 | ||
2254 | case OFPACT_SET_IPV4_DSCP: | |
f74e7df7 | 2255 | wc->masks.nw_tos |= IP_DSCP_MASK; |
9583bc14 | 2256 | /* OpenFlow 1.0 only supports IPv4. */ |
33bf9176 BP |
2257 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
2258 | flow->nw_tos &= ~IP_DSCP_MASK; | |
2259 | flow->nw_tos |= ofpact_get_SET_IPV4_DSCP(a)->dscp; | |
9583bc14 EJ |
2260 | } |
2261 | break; | |
2262 | ||
2263 | case OFPACT_SET_L4_SRC_PORT: | |
33bf9176 | 2264 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
f74e7df7 | 2265 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); |
33bf9176 BP |
2266 | if (is_ip_any(flow)) { |
2267 | flow->tp_src = htons(ofpact_get_SET_L4_SRC_PORT(a)->port); | |
9583bc14 EJ |
2268 | } |
2269 | break; | |
2270 | ||
2271 | case OFPACT_SET_L4_DST_PORT: | |
33bf9176 | 2272 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
f74e7df7 | 2273 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); |
33bf9176 BP |
2274 | if (is_ip_any(flow)) { |
2275 | flow->tp_dst = htons(ofpact_get_SET_L4_DST_PORT(a)->port); | |
9583bc14 EJ |
2276 | } |
2277 | break; | |
2278 | ||
2279 | case OFPACT_RESUBMIT: | |
2280 | xlate_ofpact_resubmit(ctx, ofpact_get_RESUBMIT(a)); | |
2281 | break; | |
2282 | ||
2283 | case OFPACT_SET_TUNNEL: | |
33bf9176 | 2284 | flow->tunnel.tun_id = htonll(ofpact_get_SET_TUNNEL(a)->tun_id); |
9583bc14 EJ |
2285 | break; |
2286 | ||
2287 | case OFPACT_SET_QUEUE: | |
2288 | xlate_set_queue_action(ctx, ofpact_get_SET_QUEUE(a)->queue_id); | |
2289 | break; | |
2290 | ||
2291 | case OFPACT_POP_QUEUE: | |
33bf9176 | 2292 | flow->skb_priority = ctx->orig_skb_priority; |
9583bc14 EJ |
2293 | break; |
2294 | ||
2295 | case OFPACT_REG_MOVE: | |
33bf9176 | 2296 | nxm_execute_reg_move(ofpact_get_REG_MOVE(a), flow, wc); |
9583bc14 EJ |
2297 | break; |
2298 | ||
2299 | case OFPACT_REG_LOAD: | |
33bf9176 | 2300 | nxm_execute_reg_load(ofpact_get_REG_LOAD(a), flow); |
9583bc14 EJ |
2301 | break; |
2302 | ||
2303 | case OFPACT_STACK_PUSH: | |
33bf9176 BP |
2304 | nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), flow, wc, |
2305 | &ctx->stack); | |
9583bc14 EJ |
2306 | break; |
2307 | ||
2308 | case OFPACT_STACK_POP: | |
f74e7df7 JP |
2309 | nxm_execute_stack_pop(ofpact_get_STACK_POP(a), flow, wc, |
2310 | &ctx->stack); | |
9583bc14 EJ |
2311 | break; |
2312 | ||
2313 | case OFPACT_PUSH_MPLS: | |
9cfef3d0 | 2314 | compose_mpls_push_action(ctx, ofpact_get_PUSH_MPLS(a)->ethertype); |
9583bc14 EJ |
2315 | break; |
2316 | ||
2317 | case OFPACT_POP_MPLS: | |
9cfef3d0 | 2318 | compose_mpls_pop_action(ctx, ofpact_get_POP_MPLS(a)->ethertype); |
9583bc14 EJ |
2319 | break; |
2320 | ||
2321 | case OFPACT_SET_MPLS_TTL: | |
9cfef3d0 | 2322 | if (compose_set_mpls_ttl_action(ctx, |
9583bc14 | 2323 | ofpact_get_SET_MPLS_TTL(a)->ttl)) { |
ad3efdcb | 2324 | return; |
9583bc14 EJ |
2325 | } |
2326 | break; | |
2327 | ||
2328 | case OFPACT_DEC_MPLS_TTL: | |
9cfef3d0 | 2329 | if (compose_dec_mpls_ttl_action(ctx)) { |
ad3efdcb | 2330 | return; |
9583bc14 EJ |
2331 | } |
2332 | break; | |
2333 | ||
2334 | case OFPACT_DEC_TTL: | |
f74e7df7 | 2335 | wc->masks.nw_ttl = 0xff; |
9583bc14 | 2336 | if (compose_dec_ttl(ctx, ofpact_get_DEC_TTL(a))) { |
ad3efdcb | 2337 | return; |
9583bc14 EJ |
2338 | } |
2339 | break; | |
2340 | ||
2341 | case OFPACT_NOTE: | |
2342 | /* Nothing to do. */ | |
2343 | break; | |
2344 | ||
2345 | case OFPACT_MULTIPATH: | |
33bf9176 | 2346 | multipath_execute(ofpact_get_MULTIPATH(a), flow, wc); |
9583bc14 EJ |
2347 | break; |
2348 | ||
2349 | case OFPACT_BUNDLE: | |
9583bc14 EJ |
2350 | xlate_bundle_action(ctx, ofpact_get_BUNDLE(a)); |
2351 | break; | |
2352 | ||
2353 | case OFPACT_OUTPUT_REG: | |
2354 | xlate_output_reg_action(ctx, ofpact_get_OUTPUT_REG(a)); | |
2355 | break; | |
2356 | ||
2357 | case OFPACT_LEARN: | |
2358 | xlate_learn_action(ctx, ofpact_get_LEARN(a)); | |
2359 | break; | |
2360 | ||
2361 | case OFPACT_EXIT: | |
2362 | ctx->exit = true; | |
2363 | break; | |
2364 | ||
2365 | case OFPACT_FIN_TIMEOUT: | |
33bf9176 | 2366 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
9583bc14 EJ |
2367 | ctx->xout->has_fin_timeout = true; |
2368 | xlate_fin_timeout(ctx, ofpact_get_FIN_TIMEOUT(a)); | |
2369 | break; | |
2370 | ||
2371 | case OFPACT_CLEAR_ACTIONS: | |
2372 | /* XXX | |
2373 | * Nothing to do because writa-actions is not supported for now. | |
2374 | * When writa-actions is supported, clear-actions also must | |
2375 | * be supported at the same time. | |
2376 | */ | |
2377 | break; | |
2378 | ||
2379 | case OFPACT_WRITE_METADATA: | |
2380 | metadata = ofpact_get_WRITE_METADATA(a); | |
33bf9176 BP |
2381 | flow->metadata &= ~metadata->mask; |
2382 | flow->metadata |= metadata->metadata & metadata->mask; | |
9583bc14 EJ |
2383 | break; |
2384 | ||
638a19b0 JR |
2385 | case OFPACT_METER: |
2386 | /* Not implemented yet. */ | |
2387 | break; | |
2388 | ||
9583bc14 EJ |
2389 | case OFPACT_GOTO_TABLE: { |
2390 | /* It is assumed that goto-table is the last action. */ | |
2391 | struct ofpact_goto_table *ogt = ofpact_get_GOTO_TABLE(a); | |
9583bc14 EJ |
2392 | |
2393 | ovs_assert(ctx->table_id < ogt->table_id); | |
4468099e EJ |
2394 | xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port, |
2395 | ogt->table_id, true); | |
9583bc14 EJ |
2396 | break; |
2397 | } | |
2398 | ||
2399 | case OFPACT_SAMPLE: | |
2400 | xlate_sample_action(ctx, ofpact_get_SAMPLE(a)); | |
2401 | break; | |
2402 | } | |
2403 | } | |
9583bc14 EJ |
2404 | } |
2405 | ||
2406 | void | |
2407 | xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto, | |
2408 | const struct flow *flow, struct rule_dpif *rule, | |
2409 | uint8_t tcp_flags, const struct ofpbuf *packet) | |
2410 | { | |
2411 | xin->ofproto = ofproto; | |
2412 | xin->flow = *flow; | |
2413 | xin->packet = packet; | |
2414 | xin->may_learn = packet != NULL; | |
2415 | xin->rule = rule; | |
2416 | xin->ofpacts = NULL; | |
2417 | xin->ofpacts_len = 0; | |
2418 | xin->tcp_flags = tcp_flags; | |
2419 | xin->resubmit_hook = NULL; | |
2420 | xin->report_hook = NULL; | |
2421 | xin->resubmit_stats = NULL; | |
2422 | } | |
2423 | ||
2424 | void | |
2425 | xlate_out_uninit(struct xlate_out *xout) | |
2426 | { | |
2427 | if (xout) { | |
2428 | ofpbuf_uninit(&xout->odp_actions); | |
2429 | } | |
2430 | } | |
2431 | ||
2432 | /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts' | |
2433 | * into datapath actions, using 'ctx', and discards the datapath actions. */ | |
2434 | void | |
2435 | xlate_actions_for_side_effects(struct xlate_in *xin) | |
2436 | { | |
2437 | struct xlate_out xout; | |
2438 | ||
2439 | xlate_actions(xin, &xout); | |
2440 | xlate_out_uninit(&xout); | |
2441 | } | |
2442 | ||
2443 | static void | |
2444 | xlate_report(struct xlate_ctx *ctx, const char *s) | |
2445 | { | |
2446 | if (ctx->xin->report_hook) { | |
4d0acc70 | 2447 | ctx->xin->report_hook(ctx->xin, s, ctx->recurse); |
9583bc14 EJ |
2448 | } |
2449 | } | |
2450 | ||
2451 | void | |
2452 | xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src) | |
2453 | { | |
2454 | dst->wc = src->wc; | |
9583bc14 EJ |
2455 | dst->slow = src->slow; |
2456 | dst->has_learn = src->has_learn; | |
2457 | dst->has_normal = src->has_normal; | |
2458 | dst->has_fin_timeout = src->has_fin_timeout; | |
2459 | dst->nf_output_iface = src->nf_output_iface; | |
2460 | dst->mirrors = src->mirrors; | |
2461 | ||
2462 | ofpbuf_use_stub(&dst->odp_actions, dst->odp_actions_stub, | |
2463 | sizeof dst->odp_actions_stub); | |
2464 | ofpbuf_put(&dst->odp_actions, src->odp_actions.data, | |
2465 | src->odp_actions.size); | |
2466 | } | |
2467 | \f | |
55954f6e EJ |
2468 | static struct skb_priority_to_dscp * |
2469 | get_skb_priority(const struct xport *xport, uint32_t skb_priority) | |
2470 | { | |
2471 | struct skb_priority_to_dscp *pdscp; | |
2472 | uint32_t hash; | |
2473 | ||
2474 | hash = hash_int(skb_priority, 0); | |
2475 | HMAP_FOR_EACH_IN_BUCKET (pdscp, hmap_node, hash, &xport->skb_priorities) { | |
2476 | if (pdscp->skb_priority == skb_priority) { | |
2477 | return pdscp; | |
2478 | } | |
2479 | } | |
2480 | return NULL; | |
2481 | } | |
2482 | ||
2483 | static bool | |
2484 | dscp_from_skb_priority(const struct xport *xport, uint32_t skb_priority, | |
2485 | uint8_t *dscp) | |
2486 | { | |
2487 | struct skb_priority_to_dscp *pdscp = get_skb_priority(xport, skb_priority); | |
2488 | *dscp = pdscp ? pdscp->dscp : 0; | |
2489 | return pdscp != NULL; | |
2490 | } | |
2491 | ||
2492 | static void | |
2493 | clear_skb_priorities(struct xport *xport) | |
2494 | { | |
2495 | struct skb_priority_to_dscp *pdscp, *next; | |
2496 | ||
2497 | HMAP_FOR_EACH_SAFE (pdscp, next, hmap_node, &xport->skb_priorities) { | |
2498 | hmap_remove(&xport->skb_priorities, &pdscp->hmap_node); | |
2499 | free(pdscp); | |
2500 | } | |
2501 | } | |
2502 | ||
ce4a6b76 BP |
2503 | static bool |
2504 | actions_output_to_local_port(const struct xlate_ctx *ctx) | |
2505 | { | |
46c88433 | 2506 | odp_port_t local_odp_port = ofp_port_to_odp_port(ctx->xbridge, OFPP_LOCAL); |
ce4a6b76 BP |
2507 | const struct nlattr *a; |
2508 | unsigned int left; | |
2509 | ||
2510 | NL_ATTR_FOR_EACH_UNSAFE (a, left, ctx->xout->odp_actions.data, | |
2511 | ctx->xout->odp_actions.size) { | |
2512 | if (nl_attr_type(a) == OVS_ACTION_ATTR_OUTPUT | |
2513 | && nl_attr_get_odp_port(a) == local_odp_port) { | |
2514 | return true; | |
2515 | } | |
2516 | } | |
2517 | return false; | |
2518 | } | |
9583bc14 EJ |
2519 | |
2520 | /* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts' | |
56450a41 BP |
2521 | * into datapath actions in 'odp_actions', using 'ctx'. |
2522 | * | |
2523 | * The caller must take responsibility for eventually freeing 'xout', with | |
2524 | * xlate_out_uninit(). */ | |
9583bc14 EJ |
2525 | void |
2526 | xlate_actions(struct xlate_in *xin, struct xlate_out *xout) | |
2527 | { | |
33bf9176 BP |
2528 | struct flow_wildcards *wc = &xout->wc; |
2529 | struct flow *flow = &xin->flow; | |
2530 | ||
9583bc14 EJ |
2531 | enum slow_path_reason special; |
2532 | const struct ofpact *ofpacts; | |
46c88433 | 2533 | struct xport *in_port; |
9583bc14 EJ |
2534 | struct flow orig_flow; |
2535 | struct xlate_ctx ctx; | |
2536 | size_t ofpacts_len; | |
62a7cc71 | 2537 | bool tnl_may_send; |
9583bc14 | 2538 | |
46c88433 | 2539 | COVERAGE_INC(xlate_actions); |
9583bc14 | 2540 | |
dc24a00f EJ |
2541 | ovs_rwlock_rdlock(&xlate_rwlock); |
2542 | ||
9583bc14 EJ |
2543 | /* Flow initialization rules: |
2544 | * - 'base_flow' must match the kernel's view of the packet at the | |
2545 | * time that action processing starts. 'flow' represents any | |
2546 | * transformations we wish to make through actions. | |
2547 | * - By default 'base_flow' and 'flow' are the same since the input | |
2548 | * packet matches the output before any actions are applied. | |
2549 | * - When using VLAN splinters, 'base_flow''s VLAN is set to the value | |
2550 | * of the received packet as seen by the kernel. If we later output | |
2551 | * to another device without any modifications this will cause us to | |
2552 | * insert a new tag since the original one was stripped off by the | |
2553 | * VLAN device. | |
2554 | * - Tunnel metadata as received is retained in 'flow'. This allows | |
2555 | * tunnel metadata matching also in later tables. | |
2556 | * Since a kernel action for setting the tunnel metadata will only be | |
2557 | * generated with actual tunnel output, changing the tunnel metadata | |
2558 | * values in 'flow' (such as tun_id) will only have effect with a later | |
2559 | * tunnel output action. | |
2560 | * - Tunnel 'base_flow' is completely cleared since that is what the | |
2561 | * kernel does. If we wish to maintain the original values an action | |
2562 | * needs to be generated. */ | |
2563 | ||
2564 | ctx.xin = xin; | |
2565 | ctx.xout = xout; | |
46c88433 EJ |
2566 | ctx.xout->slow = 0; |
2567 | ctx.xout->has_learn = false; | |
2568 | ctx.xout->has_normal = false; | |
2569 | ctx.xout->has_fin_timeout = false; | |
2570 | ctx.xout->nf_output_iface = NF_OUT_DROP; | |
2571 | ctx.xout->mirrors = 0; | |
2572 | ofpbuf_use_stub(&ctx.xout->odp_actions, ctx.xout->odp_actions_stub, | |
2573 | sizeof ctx.xout->odp_actions_stub); | |
2574 | ofpbuf_reserve(&ctx.xout->odp_actions, NL_A_U32_SIZE); | |
2575 | ||
2576 | ctx.xbridge = xbridge_lookup(xin->ofproto); | |
2577 | if (!ctx.xbridge) { | |
dc24a00f | 2578 | goto out; |
46c88433 | 2579 | } |
9583bc14 | 2580 | |
9583bc14 EJ |
2581 | ctx.rule = xin->rule; |
2582 | ||
33bf9176 | 2583 | ctx.base_flow = *flow; |
9583bc14 | 2584 | memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel); |
33bf9176 | 2585 | ctx.orig_tunnel_ip_dst = flow->tunnel.ip_dst; |
9583bc14 | 2586 | |
33bf9176 BP |
2587 | flow_wildcards_init_catchall(wc); |
2588 | memset(&wc->masks.in_port, 0xff, sizeof wc->masks.in_port); | |
1dd35f8a | 2589 | memset(&wc->masks.skb_priority, 0xff, sizeof wc->masks.skb_priority); |
7431e171 | 2590 | memset(&wc->masks.dl_type, 0xff, sizeof wc->masks.dl_type); |
1dd35f8a | 2591 | wc->masks.nw_frag |= FLOW_NW_FRAG_MASK; |
9583bc14 | 2592 | |
62a7cc71 | 2593 | tnl_may_send = tnl_xlate_init(&ctx.base_flow, flow, wc); |
46c88433 | 2594 | if (ctx.xbridge->has_netflow) { |
9b658910 | 2595 | netflow_mask_wc(flow, wc); |
9583bc14 EJ |
2596 | } |
2597 | ||
9583bc14 | 2598 | ctx.recurse = 0; |
33bf9176 | 2599 | ctx.orig_skb_priority = flow->skb_priority; |
9583bc14 EJ |
2600 | ctx.table_id = 0; |
2601 | ctx.exit = false; | |
2602 | ||
2603 | if (xin->ofpacts) { | |
2604 | ofpacts = xin->ofpacts; | |
2605 | ofpacts_len = xin->ofpacts_len; | |
2606 | } else if (xin->rule) { | |
70742c7f | 2607 | rule_dpif_get_actions(xin->rule, &ofpacts, &ofpacts_len); |
9583bc14 EJ |
2608 | } else { |
2609 | NOT_REACHED(); | |
2610 | } | |
2611 | ||
2612 | ofpbuf_use_stub(&ctx.stack, ctx.init_stack, sizeof ctx.init_stack); | |
2613 | ||
ade6ad9c | 2614 | if (mbridge_has_mirrors(ctx.xbridge->mbridge)) { |
9583bc14 EJ |
2615 | /* Do this conditionally because the copy is expensive enough that it |
2616 | * shows up in profiles. */ | |
33bf9176 | 2617 | orig_flow = *flow; |
9583bc14 EJ |
2618 | } |
2619 | ||
33bf9176 | 2620 | if (flow->nw_frag & FLOW_NW_FRAG_ANY) { |
46c88433 | 2621 | switch (ctx.xbridge->frag) { |
9583bc14 EJ |
2622 | case OFPC_FRAG_NORMAL: |
2623 | /* We must pretend that transport ports are unavailable. */ | |
33bf9176 BP |
2624 | flow->tp_src = ctx.base_flow.tp_src = htons(0); |
2625 | flow->tp_dst = ctx.base_flow.tp_dst = htons(0); | |
9583bc14 EJ |
2626 | break; |
2627 | ||
2628 | case OFPC_FRAG_DROP: | |
dc24a00f | 2629 | goto out; |
9583bc14 EJ |
2630 | |
2631 | case OFPC_FRAG_REASM: | |
2632 | NOT_REACHED(); | |
2633 | ||
2634 | case OFPC_FRAG_NX_MATCH: | |
2635 | /* Nothing to do. */ | |
2636 | break; | |
2637 | ||
2638 | case OFPC_INVALID_TTL_TO_CONTROLLER: | |
2639 | NOT_REACHED(); | |
2640 | } | |
2641 | } | |
2642 | ||
46c88433 | 2643 | in_port = get_ofp_port(ctx.xbridge, flow->in_port.ofp_port); |
642dc74d | 2644 | special = process_special(&ctx, flow, in_port, ctx.xin->packet); |
9583bc14 EJ |
2645 | if (special) { |
2646 | ctx.xout->slow = special; | |
2647 | } else { | |
9583bc14 | 2648 | size_t sample_actions_len; |
9583bc14 | 2649 | |
4e022ec0 | 2650 | if (flow->in_port.ofp_port |
46c88433 EJ |
2651 | != vsp_realdev_to_vlandev(ctx.xbridge->ofproto, |
2652 | flow->in_port.ofp_port, | |
33bf9176 | 2653 | flow->vlan_tci)) { |
9583bc14 EJ |
2654 | ctx.base_flow.vlan_tci = 0; |
2655 | } | |
2656 | ||
2657 | add_sflow_action(&ctx); | |
2658 | add_ipfix_action(&ctx); | |
2659 | sample_actions_len = ctx.xout->odp_actions.size; | |
2660 | ||
62a7cc71 | 2661 | if (tnl_may_send && (!in_port || may_receive(in_port, &ctx))) { |
9583bc14 EJ |
2662 | do_xlate_actions(ofpacts, ofpacts_len, &ctx); |
2663 | ||
2664 | /* We've let OFPP_NORMAL and the learning action look at the | |
2665 | * packet, so drop it now if forwarding is disabled. */ | |
9d189a50 | 2666 | if (in_port && !xport_stp_forward_state(in_port)) { |
9583bc14 EJ |
2667 | ctx.xout->odp_actions.size = sample_actions_len; |
2668 | } | |
2669 | } | |
2670 | ||
46c88433 | 2671 | if (ctx.xbridge->has_in_band |
ce4a6b76 BP |
2672 | && in_band_must_output_to_local_port(flow) |
2673 | && !actions_output_to_local_port(&ctx)) { | |
9583bc14 EJ |
2674 | compose_output_action(&ctx, OFPP_LOCAL); |
2675 | } | |
aaa0fbae EJ |
2676 | |
2677 | fix_sflow_action(&ctx); | |
2678 | ||
46c88433 | 2679 | if (mbridge_has_mirrors(ctx.xbridge->mbridge)) { |
9583bc14 EJ |
2680 | add_mirror_actions(&ctx, &orig_flow); |
2681 | } | |
9583bc14 EJ |
2682 | } |
2683 | ||
2684 | ofpbuf_uninit(&ctx.stack); | |
2685 | ||
2686 | /* Clear the metadata and register wildcard masks, because we won't | |
2687 | * use non-header fields as part of the cache. */ | |
33bf9176 BP |
2688 | memset(&wc->masks.metadata, 0, sizeof wc->masks.metadata); |
2689 | memset(&wc->masks.regs, 0, sizeof wc->masks.regs); | |
dc24a00f EJ |
2690 | |
2691 | out: | |
2692 | ovs_rwlock_unlock(&xlate_rwlock); | |
9583bc14 | 2693 | } |