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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" | |
6f00e29b | 47 | #include "ofproto/ofproto-provider.h" |
9583bc14 EJ |
48 | #include "tunnel.h" |
49 | #include "vlog.h" | |
50 | ||
46c88433 | 51 | COVERAGE_DEFINE(xlate_actions); |
0f032e95 | 52 | COVERAGE_DEFINE(xlate_actions_oversize); |
9583bc14 EJ |
53 | |
54 | VLOG_DEFINE_THIS_MODULE(ofproto_dpif_xlate); | |
55 | ||
8a553e9a EJ |
56 | /* Maximum depth of flow table recursion (due to resubmit actions) in a |
57 | * flow translation. */ | |
58 | #define MAX_RESUBMIT_RECURSION 64 | |
59 | ||
98b07853 BP |
60 | /* Maximum number of resubmit actions in a flow translation, whether they are |
61 | * recursive or not. */ | |
62 | #define MAX_RESUBMITS (MAX_RESUBMIT_RECURSION * MAX_RESUBMIT_RECURSION) | |
63 | ||
dc24a00f EJ |
64 | struct ovs_rwlock xlate_rwlock = OVS_RWLOCK_INITIALIZER; |
65 | ||
46c88433 EJ |
66 | struct xbridge { |
67 | struct hmap_node hmap_node; /* Node in global 'xbridges' map. */ | |
68 | struct ofproto_dpif *ofproto; /* Key in global 'xbridges' map. */ | |
69 | ||
70 | struct list xbundles; /* Owned xbundles. */ | |
71 | struct hmap xports; /* Indexed by ofp_port. */ | |
72 | ||
73 | char *name; /* Name used in log messages. */ | |
89a8a7f0 | 74 | struct dpif *dpif; /* Datapath interface. */ |
46c88433 EJ |
75 | struct mac_learning *ml; /* Mac learning handle. */ |
76 | struct mbridge *mbridge; /* Mirroring. */ | |
77 | struct dpif_sflow *sflow; /* SFlow handle, or null. */ | |
78 | struct dpif_ipfix *ipfix; /* Ipfix handle, or null. */ | |
9d189a50 | 79 | struct stp *stp; /* STP or null if disabled. */ |
46c88433 | 80 | |
ec89fc6f EJ |
81 | /* Special rules installed by ofproto-dpif. */ |
82 | struct rule_dpif *miss_rule; | |
83 | struct rule_dpif *no_packet_in_rule; | |
84 | ||
46c88433 | 85 | enum ofp_config_flags frag; /* Fragmentation handling. */ |
46c88433 EJ |
86 | bool has_netflow; /* Bridge runs netflow? */ |
87 | bool has_in_band; /* Bridge has in band control? */ | |
88 | bool forward_bpdu; /* Bridge forwards STP BPDUs? */ | |
89 | }; | |
90 | ||
91 | struct xbundle { | |
92 | struct hmap_node hmap_node; /* In global 'xbundles' map. */ | |
93 | struct ofbundle *ofbundle; /* Key in global 'xbundles' map. */ | |
94 | ||
95 | struct list list_node; /* In parent 'xbridges' list. */ | |
96 | struct xbridge *xbridge; /* Parent xbridge. */ | |
97 | ||
98 | struct list xports; /* Contains "struct xport"s. */ | |
99 | ||
100 | char *name; /* Name used in log messages. */ | |
101 | struct bond *bond; /* Nonnull iff more than one port. */ | |
102 | struct lacp *lacp; /* LACP handle or null. */ | |
103 | ||
104 | enum port_vlan_mode vlan_mode; /* VLAN mode. */ | |
105 | int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */ | |
106 | unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1. | |
107 | * NULL if all VLANs are trunked. */ | |
108 | bool use_priority_tags; /* Use 802.1p tag for frames in VLAN 0? */ | |
109 | bool floodable; /* No port has OFPUTIL_PC_NO_FLOOD set? */ | |
110 | }; | |
111 | ||
112 | struct xport { | |
113 | struct hmap_node hmap_node; /* Node in global 'xports' map. */ | |
114 | struct ofport_dpif *ofport; /* Key in global 'xports map. */ | |
115 | ||
116 | struct hmap_node ofp_node; /* Node in parent xbridge 'xports' map. */ | |
117 | ofp_port_t ofp_port; /* Key in parent xbridge 'xports' map. */ | |
118 | ||
119 | odp_port_t odp_port; /* Datapath port number or ODPP_NONE. */ | |
120 | ||
121 | struct list bundle_node; /* In parent xbundle (if it exists). */ | |
122 | struct xbundle *xbundle; /* Parent xbundle or null. */ | |
123 | ||
124 | struct netdev *netdev; /* 'ofport''s netdev. */ | |
125 | ||
126 | struct xbridge *xbridge; /* Parent bridge. */ | |
127 | struct xport *peer; /* Patch port peer or null. */ | |
128 | ||
129 | enum ofputil_port_config config; /* OpenFlow port configuration. */ | |
92cf817b | 130 | int stp_port_no; /* STP port number or -1 if not in use. */ |
46c88433 | 131 | |
55954f6e EJ |
132 | struct hmap skb_priorities; /* Map of 'skb_priority_to_dscp's. */ |
133 | ||
46c88433 EJ |
134 | bool may_enable; /* May be enabled in bonds. */ |
135 | bool is_tunnel; /* Is a tunnel port. */ | |
136 | ||
137 | struct cfm *cfm; /* CFM handle or null. */ | |
138 | struct bfd *bfd; /* BFD handle or null. */ | |
139 | }; | |
140 | ||
4d0acc70 EJ |
141 | struct xlate_ctx { |
142 | struct xlate_in *xin; | |
143 | struct xlate_out *xout; | |
144 | ||
46c88433 | 145 | const struct xbridge *xbridge; |
4d0acc70 EJ |
146 | |
147 | /* Flow at the last commit. */ | |
148 | struct flow base_flow; | |
149 | ||
150 | /* Tunnel IP destination address as received. This is stored separately | |
151 | * as the base_flow.tunnel is cleared on init to reflect the datapath | |
152 | * behavior. Used to make sure not to send tunneled output to ourselves, | |
153 | * which might lead to an infinite loop. This could happen easily | |
154 | * if a tunnel is marked as 'ip_remote=flow', and the flow does not | |
155 | * actually set the tun_dst field. */ | |
156 | ovs_be32 orig_tunnel_ip_dst; | |
157 | ||
158 | /* Stack for the push and pop actions. Each stack element is of type | |
159 | * "union mf_subvalue". */ | |
160 | union mf_subvalue init_stack[1024 / sizeof(union mf_subvalue)]; | |
161 | struct ofpbuf stack; | |
162 | ||
163 | /* The rule that we are currently translating, or NULL. */ | |
164 | struct rule_dpif *rule; | |
165 | ||
b0a17866 SH |
166 | int mpls_depth_delta; /* Delta of the mpls stack depth since |
167 | * actions were last committed. | |
168 | * Must be between -1 and 1 inclusive. */ | |
169 | ovs_be32 pre_push_mpls_lse; /* Used to record the top-most MPLS LSE | |
170 | * prior to an mpls_push so that it may be | |
171 | * used for a subsequent mpls_pop. */ | |
172 | ||
98b07853 BP |
173 | /* Resubmit statistics, via xlate_table_action(). */ |
174 | int recurse; /* Current resubmit nesting depth. */ | |
175 | int resubmits; /* Total number of resubmits. */ | |
176 | ||
4d0acc70 EJ |
177 | uint32_t orig_skb_priority; /* Priority when packet arrived. */ |
178 | uint8_t table_id; /* OpenFlow table ID where flow was found. */ | |
179 | uint32_t sflow_n_outputs; /* Number of output ports. */ | |
4e022ec0 | 180 | odp_port_t sflow_odp_port; /* Output port for composing sFlow action. */ |
4d0acc70 EJ |
181 | uint16_t user_cookie_offset;/* Used for user_action_cookie fixup. */ |
182 | bool exit; /* No further actions should be processed. */ | |
7fdb60a7 SH |
183 | |
184 | /* OpenFlow 1.1+ action set. | |
185 | * | |
186 | * 'action_set' accumulates "struct ofpact"s added by OFPACT_WRITE_ACTIONS. | |
187 | * When translation is otherwise complete, ofpacts_execute_action_set() | |
188 | * converts it to a set of "struct ofpact"s that can be translated into | |
189 | * datapath actions. */ | |
190 | struct ofpbuf action_set; /* Action set. */ | |
191 | uint64_t action_set_stub[1024 / 8]; | |
4d0acc70 EJ |
192 | }; |
193 | ||
9583bc14 EJ |
194 | /* A controller may use OFPP_NONE as the ingress port to indicate that |
195 | * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for | |
196 | * when an input bundle is needed for validation (e.g., mirroring or | |
197 | * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have | |
3815d6c2 LS |
198 | * any 'port' structs, so care must be taken when dealing with it. |
199 | * The bundle's name and vlan mode are initialized in lookup_input_bundle() */ | |
200 | static struct xbundle ofpp_none_bundle; | |
9583bc14 | 201 | |
55954f6e EJ |
202 | /* Node in 'xport''s 'skb_priorities' map. Used to maintain a map from |
203 | * 'priority' (the datapath's term for QoS queue) to the dscp bits which all | |
204 | * traffic egressing the 'ofport' with that priority should be marked with. */ | |
205 | struct skb_priority_to_dscp { | |
206 | struct hmap_node hmap_node; /* Node in 'ofport_dpif''s 'skb_priorities'. */ | |
207 | uint32_t skb_priority; /* Priority of this queue (see struct flow). */ | |
208 | ||
209 | uint8_t dscp; /* DSCP bits to mark outgoing traffic with. */ | |
210 | }; | |
211 | ||
46c88433 EJ |
212 | static struct hmap xbridges = HMAP_INITIALIZER(&xbridges); |
213 | static struct hmap xbundles = HMAP_INITIALIZER(&xbundles); | |
214 | static struct hmap xports = HMAP_INITIALIZER(&xports); | |
215 | ||
216 | static bool may_receive(const struct xport *, struct xlate_ctx *); | |
9583bc14 EJ |
217 | static void do_xlate_actions(const struct ofpact *, size_t ofpacts_len, |
218 | struct xlate_ctx *); | |
91d6cd12 AW |
219 | static void xlate_actions__(struct xlate_in *, struct xlate_out *) |
220 | OVS_REQ_RDLOCK(xlate_rwlock); | |
9583bc14 EJ |
221 | static void xlate_normal(struct xlate_ctx *); |
222 | static void xlate_report(struct xlate_ctx *, const char *); | |
4e022ec0 | 223 | static void xlate_table_action(struct xlate_ctx *, ofp_port_t in_port, |
9583bc14 | 224 | uint8_t table_id, bool may_packet_in); |
46c88433 EJ |
225 | static bool input_vid_is_valid(uint16_t vid, struct xbundle *, bool warn); |
226 | static uint16_t input_vid_to_vlan(const struct xbundle *, uint16_t vid); | |
227 | static void output_normal(struct xlate_ctx *, const struct xbundle *, | |
9583bc14 | 228 | uint16_t vlan); |
4e022ec0 | 229 | static void compose_output_action(struct xlate_ctx *, ofp_port_t ofp_port); |
9583bc14 | 230 | |
46c88433 EJ |
231 | static struct xbridge *xbridge_lookup(const struct ofproto_dpif *); |
232 | static struct xbundle *xbundle_lookup(const struct ofbundle *); | |
5e6af486 | 233 | static struct xport *xport_lookup(const struct ofport_dpif *); |
46c88433 | 234 | static struct xport *get_ofp_port(const struct xbridge *, ofp_port_t ofp_port); |
55954f6e EJ |
235 | static struct skb_priority_to_dscp *get_skb_priority(const struct xport *, |
236 | uint32_t skb_priority); | |
237 | static void clear_skb_priorities(struct xport *); | |
238 | static bool dscp_from_skb_priority(const struct xport *, uint32_t skb_priority, | |
239 | uint8_t *dscp); | |
46c88433 EJ |
240 | |
241 | void | |
242 | xlate_ofproto_set(struct ofproto_dpif *ofproto, const char *name, | |
ec89fc6f EJ |
243 | struct dpif *dpif, struct rule_dpif *miss_rule, |
244 | struct rule_dpif *no_packet_in_rule, | |
245 | const struct mac_learning *ml, struct stp *stp, | |
246 | const struct mbridge *mbridge, | |
46c88433 EJ |
247 | const struct dpif_sflow *sflow, |
248 | const struct dpif_ipfix *ipfix, enum ofp_config_flags frag, | |
9d189a50 | 249 | bool forward_bpdu, bool has_in_band, bool has_netflow) |
46c88433 EJ |
250 | { |
251 | struct xbridge *xbridge = xbridge_lookup(ofproto); | |
252 | ||
253 | if (!xbridge) { | |
254 | xbridge = xzalloc(sizeof *xbridge); | |
255 | xbridge->ofproto = ofproto; | |
256 | ||
257 | hmap_insert(&xbridges, &xbridge->hmap_node, hash_pointer(ofproto, 0)); | |
258 | hmap_init(&xbridge->xports); | |
259 | list_init(&xbridge->xbundles); | |
260 | } | |
261 | ||
262 | if (xbridge->ml != ml) { | |
263 | mac_learning_unref(xbridge->ml); | |
264 | xbridge->ml = mac_learning_ref(ml); | |
265 | } | |
266 | ||
267 | if (xbridge->mbridge != mbridge) { | |
268 | mbridge_unref(xbridge->mbridge); | |
269 | xbridge->mbridge = mbridge_ref(mbridge); | |
270 | } | |
271 | ||
272 | if (xbridge->sflow != sflow) { | |
273 | dpif_sflow_unref(xbridge->sflow); | |
274 | xbridge->sflow = dpif_sflow_ref(sflow); | |
275 | } | |
276 | ||
277 | if (xbridge->ipfix != ipfix) { | |
278 | dpif_ipfix_unref(xbridge->ipfix); | |
279 | xbridge->ipfix = dpif_ipfix_ref(ipfix); | |
280 | } | |
281 | ||
9d189a50 EJ |
282 | if (xbridge->stp != stp) { |
283 | stp_unref(xbridge->stp); | |
284 | xbridge->stp = stp_ref(stp); | |
285 | } | |
286 | ||
46c88433 EJ |
287 | free(xbridge->name); |
288 | xbridge->name = xstrdup(name); | |
289 | ||
89a8a7f0 | 290 | xbridge->dpif = dpif; |
46c88433 EJ |
291 | xbridge->forward_bpdu = forward_bpdu; |
292 | xbridge->has_in_band = has_in_band; | |
293 | xbridge->has_netflow = has_netflow; | |
46c88433 | 294 | xbridge->frag = frag; |
ec89fc6f EJ |
295 | xbridge->miss_rule = miss_rule; |
296 | xbridge->no_packet_in_rule = no_packet_in_rule; | |
46c88433 EJ |
297 | } |
298 | ||
299 | void | |
300 | xlate_remove_ofproto(struct ofproto_dpif *ofproto) | |
301 | { | |
302 | struct xbridge *xbridge = xbridge_lookup(ofproto); | |
303 | struct xbundle *xbundle, *next_xbundle; | |
304 | struct xport *xport, *next_xport; | |
305 | ||
306 | if (!xbridge) { | |
307 | return; | |
308 | } | |
309 | ||
310 | HMAP_FOR_EACH_SAFE (xport, next_xport, ofp_node, &xbridge->xports) { | |
311 | xlate_ofport_remove(xport->ofport); | |
312 | } | |
313 | ||
314 | LIST_FOR_EACH_SAFE (xbundle, next_xbundle, list_node, &xbridge->xbundles) { | |
315 | xlate_bundle_remove(xbundle->ofbundle); | |
316 | } | |
317 | ||
318 | hmap_remove(&xbridges, &xbridge->hmap_node); | |
795cc5c1 EJ |
319 | mac_learning_unref(xbridge->ml); |
320 | mbridge_unref(xbridge->mbridge); | |
321 | dpif_sflow_unref(xbridge->sflow); | |
322 | dpif_ipfix_unref(xbridge->ipfix); | |
323 | stp_unref(xbridge->stp); | |
324 | hmap_destroy(&xbridge->xports); | |
46c88433 EJ |
325 | free(xbridge->name); |
326 | free(xbridge); | |
327 | } | |
328 | ||
329 | void | |
330 | xlate_bundle_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle, | |
331 | const char *name, enum port_vlan_mode vlan_mode, int vlan, | |
332 | unsigned long *trunks, bool use_priority_tags, | |
333 | const struct bond *bond, const struct lacp *lacp, | |
334 | bool floodable) | |
335 | { | |
336 | struct xbundle *xbundle = xbundle_lookup(ofbundle); | |
337 | ||
338 | if (!xbundle) { | |
339 | xbundle = xzalloc(sizeof *xbundle); | |
340 | xbundle->ofbundle = ofbundle; | |
341 | xbundle->xbridge = xbridge_lookup(ofproto); | |
342 | ||
343 | hmap_insert(&xbundles, &xbundle->hmap_node, hash_pointer(ofbundle, 0)); | |
344 | list_insert(&xbundle->xbridge->xbundles, &xbundle->list_node); | |
345 | list_init(&xbundle->xports); | |
346 | } | |
347 | ||
348 | ovs_assert(xbundle->xbridge); | |
349 | ||
350 | free(xbundle->name); | |
351 | xbundle->name = xstrdup(name); | |
352 | ||
353 | xbundle->vlan_mode = vlan_mode; | |
354 | xbundle->vlan = vlan; | |
355 | xbundle->trunks = trunks; | |
356 | xbundle->use_priority_tags = use_priority_tags; | |
357 | xbundle->floodable = floodable; | |
358 | ||
359 | if (xbundle->bond != bond) { | |
360 | bond_unref(xbundle->bond); | |
361 | xbundle->bond = bond_ref(bond); | |
362 | } | |
363 | ||
364 | if (xbundle->lacp != lacp) { | |
365 | lacp_unref(xbundle->lacp); | |
366 | xbundle->lacp = lacp_ref(lacp); | |
367 | } | |
368 | } | |
369 | ||
370 | void | |
371 | xlate_bundle_remove(struct ofbundle *ofbundle) | |
372 | { | |
373 | struct xbundle *xbundle = xbundle_lookup(ofbundle); | |
374 | struct xport *xport, *next; | |
375 | ||
376 | if (!xbundle) { | |
377 | return; | |
378 | } | |
379 | ||
380 | LIST_FOR_EACH_SAFE (xport, next, bundle_node, &xbundle->xports) { | |
381 | list_remove(&xport->bundle_node); | |
382 | xport->xbundle = NULL; | |
383 | } | |
384 | ||
385 | hmap_remove(&xbundles, &xbundle->hmap_node); | |
386 | list_remove(&xbundle->list_node); | |
387 | bond_unref(xbundle->bond); | |
388 | lacp_unref(xbundle->lacp); | |
389 | free(xbundle->name); | |
390 | free(xbundle); | |
391 | } | |
392 | ||
393 | void | |
394 | xlate_ofport_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle, | |
395 | struct ofport_dpif *ofport, ofp_port_t ofp_port, | |
396 | odp_port_t odp_port, const struct netdev *netdev, | |
397 | const struct cfm *cfm, const struct bfd *bfd, | |
9d189a50 | 398 | struct ofport_dpif *peer, int stp_port_no, |
55954f6e | 399 | const struct ofproto_port_queue *qdscp_list, size_t n_qdscp, |
9d189a50 EJ |
400 | enum ofputil_port_config config, bool is_tunnel, |
401 | bool may_enable) | |
46c88433 EJ |
402 | { |
403 | struct xport *xport = xport_lookup(ofport); | |
55954f6e | 404 | size_t i; |
46c88433 EJ |
405 | |
406 | if (!xport) { | |
407 | xport = xzalloc(sizeof *xport); | |
408 | xport->ofport = ofport; | |
409 | xport->xbridge = xbridge_lookup(ofproto); | |
410 | xport->ofp_port = ofp_port; | |
411 | ||
55954f6e | 412 | hmap_init(&xport->skb_priorities); |
46c88433 EJ |
413 | hmap_insert(&xports, &xport->hmap_node, hash_pointer(ofport, 0)); |
414 | hmap_insert(&xport->xbridge->xports, &xport->ofp_node, | |
415 | hash_ofp_port(xport->ofp_port)); | |
416 | } | |
417 | ||
418 | ovs_assert(xport->ofp_port == ofp_port); | |
419 | ||
420 | xport->config = config; | |
9d189a50 | 421 | xport->stp_port_no = stp_port_no; |
46c88433 EJ |
422 | xport->is_tunnel = is_tunnel; |
423 | xport->may_enable = may_enable; | |
424 | xport->odp_port = odp_port; | |
425 | ||
426 | if (xport->netdev != netdev) { | |
427 | netdev_close(xport->netdev); | |
428 | xport->netdev = netdev_ref(netdev); | |
429 | } | |
430 | ||
431 | if (xport->cfm != cfm) { | |
432 | cfm_unref(xport->cfm); | |
433 | xport->cfm = cfm_ref(cfm); | |
434 | } | |
435 | ||
436 | if (xport->bfd != bfd) { | |
437 | bfd_unref(xport->bfd); | |
438 | xport->bfd = bfd_ref(bfd); | |
439 | } | |
440 | ||
441 | if (xport->peer) { | |
442 | xport->peer->peer = NULL; | |
443 | } | |
5e6af486 | 444 | xport->peer = xport_lookup(peer); |
46c88433 EJ |
445 | if (xport->peer) { |
446 | xport->peer->peer = xport; | |
447 | } | |
448 | ||
449 | if (xport->xbundle) { | |
450 | list_remove(&xport->bundle_node); | |
451 | } | |
5e6af486 | 452 | xport->xbundle = xbundle_lookup(ofbundle); |
46c88433 EJ |
453 | if (xport->xbundle) { |
454 | list_insert(&xport->xbundle->xports, &xport->bundle_node); | |
455 | } | |
55954f6e EJ |
456 | |
457 | clear_skb_priorities(xport); | |
458 | for (i = 0; i < n_qdscp; i++) { | |
459 | struct skb_priority_to_dscp *pdscp; | |
460 | uint32_t skb_priority; | |
461 | ||
89a8a7f0 EJ |
462 | if (dpif_queue_to_priority(xport->xbridge->dpif, qdscp_list[i].queue, |
463 | &skb_priority)) { | |
55954f6e EJ |
464 | continue; |
465 | } | |
466 | ||
467 | pdscp = xmalloc(sizeof *pdscp); | |
468 | pdscp->skb_priority = skb_priority; | |
469 | pdscp->dscp = (qdscp_list[i].dscp << 2) & IP_DSCP_MASK; | |
470 | hmap_insert(&xport->skb_priorities, &pdscp->hmap_node, | |
471 | hash_int(pdscp->skb_priority, 0)); | |
472 | } | |
46c88433 EJ |
473 | } |
474 | ||
475 | void | |
476 | xlate_ofport_remove(struct ofport_dpif *ofport) | |
477 | { | |
478 | struct xport *xport = xport_lookup(ofport); | |
479 | ||
480 | if (!xport) { | |
481 | return; | |
482 | } | |
483 | ||
484 | if (xport->peer) { | |
485 | xport->peer->peer = NULL; | |
486 | xport->peer = NULL; | |
487 | } | |
488 | ||
e621a12d EJ |
489 | if (xport->xbundle) { |
490 | list_remove(&xport->bundle_node); | |
491 | } | |
492 | ||
55954f6e EJ |
493 | clear_skb_priorities(xport); |
494 | hmap_destroy(&xport->skb_priorities); | |
495 | ||
46c88433 EJ |
496 | hmap_remove(&xports, &xport->hmap_node); |
497 | hmap_remove(&xport->xbridge->xports, &xport->ofp_node); | |
498 | ||
499 | netdev_close(xport->netdev); | |
500 | cfm_unref(xport->cfm); | |
501 | bfd_unref(xport->bfd); | |
502 | free(xport); | |
503 | } | |
504 | ||
8449c4d6 EJ |
505 | /* Given a datpath, packet, and flow metadata ('backer', 'packet', and 'key' |
506 | * respectively), populates 'flow' with the result of odp_flow_key_to_flow(). | |
507 | * Optionally, if nonnull, populates 'fitnessp' with the fitness of 'flow' as | |
508 | * returned by odp_flow_key_to_flow(). Also, optionally populates 'ofproto' | |
509 | * with the ofproto_dpif, and 'odp_in_port' with the datapath in_port, that | |
510 | * 'packet' ingressed. | |
511 | * | |
512 | * If 'ofproto' is nonnull, requires 'flow''s in_port to exist. Otherwise sets | |
513 | * 'flow''s in_port to OFPP_NONE. | |
514 | * | |
515 | * This function does post-processing on data returned from | |
516 | * odp_flow_key_to_flow() to help make VLAN splinters transparent to the rest | |
517 | * of the upcall processing logic. In particular, if the extracted in_port is | |
518 | * a VLAN splinter port, it replaces flow->in_port by the "real" port, sets | |
519 | * flow->vlan_tci correctly for the VLAN of the VLAN splinter port, and pushes | |
520 | * a VLAN header onto 'packet' (if it is nonnull). | |
521 | * | |
522 | * Similarly, this function also includes some logic to help with tunnels. It | |
523 | * may modify 'flow' as necessary to make the tunneling implementation | |
524 | * transparent to the upcall processing logic. | |
525 | * | |
526 | * Returns 0 if successful, ENODEV if the parsed flow has no associated ofport, | |
527 | * or some other positive errno if there are other problems. */ | |
528 | int | |
529 | xlate_receive(const struct dpif_backer *backer, struct ofpbuf *packet, | |
530 | const struct nlattr *key, size_t key_len, | |
531 | struct flow *flow, enum odp_key_fitness *fitnessp, | |
532 | struct ofproto_dpif **ofproto, odp_port_t *odp_in_port) | |
533 | { | |
534 | enum odp_key_fitness fitness; | |
535 | const struct xport *xport; | |
536 | int error = ENODEV; | |
537 | ||
dc24a00f | 538 | ovs_rwlock_rdlock(&xlate_rwlock); |
8449c4d6 EJ |
539 | fitness = odp_flow_key_to_flow(key, key_len, flow); |
540 | if (fitness == ODP_FIT_ERROR) { | |
541 | error = EINVAL; | |
542 | goto exit; | |
543 | } | |
544 | ||
545 | if (odp_in_port) { | |
546 | *odp_in_port = flow->in_port.odp_port; | |
547 | } | |
548 | ||
549 | xport = xport_lookup(tnl_port_should_receive(flow) | |
550 | ? tnl_port_receive(flow) | |
551 | : odp_port_to_ofport(backer, flow->in_port.odp_port)); | |
552 | ||
553 | flow->in_port.ofp_port = xport ? xport->ofp_port : OFPP_NONE; | |
554 | if (!xport) { | |
555 | goto exit; | |
556 | } | |
557 | ||
558 | if (vsp_adjust_flow(xport->xbridge->ofproto, flow)) { | |
559 | if (packet) { | |
560 | /* Make the packet resemble the flow, so that it gets sent to | |
561 | * an OpenFlow controller properly, so that it looks correct | |
562 | * for sFlow, and so that flow_extract() will get the correct | |
563 | * vlan_tci if it is called on 'packet'. | |
564 | * | |
565 | * The allocated space inside 'packet' probably also contains | |
566 | * 'key', that is, both 'packet' and 'key' are probably part of | |
567 | * a struct dpif_upcall (see the large comment on that | |
568 | * structure definition), so pushing data on 'packet' is in | |
569 | * general not a good idea since it could overwrite 'key' or | |
570 | * free it as a side effect. However, it's OK in this special | |
571 | * case because we know that 'packet' is inside a Netlink | |
572 | * attribute: pushing 4 bytes will just overwrite the 4-byte | |
573 | * "struct nlattr", which is fine since we don't need that | |
574 | * header anymore. */ | |
575 | eth_push_vlan(packet, flow->vlan_tci); | |
576 | } | |
577 | /* We can't reproduce 'key' from 'flow'. */ | |
578 | fitness = fitness == ODP_FIT_PERFECT ? ODP_FIT_TOO_MUCH : fitness; | |
579 | } | |
580 | error = 0; | |
581 | ||
582 | if (ofproto) { | |
583 | *ofproto = xport->xbridge->ofproto; | |
584 | } | |
585 | ||
586 | exit: | |
587 | if (fitnessp) { | |
588 | *fitnessp = fitness; | |
589 | } | |
dc24a00f | 590 | ovs_rwlock_unlock(&xlate_rwlock); |
8449c4d6 EJ |
591 | return error; |
592 | } | |
593 | ||
46c88433 EJ |
594 | static struct xbridge * |
595 | xbridge_lookup(const struct ofproto_dpif *ofproto) | |
596 | { | |
597 | struct xbridge *xbridge; | |
598 | ||
5e6af486 EJ |
599 | if (!ofproto) { |
600 | return NULL; | |
601 | } | |
602 | ||
46c88433 EJ |
603 | HMAP_FOR_EACH_IN_BUCKET (xbridge, hmap_node, hash_pointer(ofproto, 0), |
604 | &xbridges) { | |
605 | if (xbridge->ofproto == ofproto) { | |
606 | return xbridge; | |
607 | } | |
608 | } | |
609 | return NULL; | |
610 | } | |
611 | ||
612 | static struct xbundle * | |
613 | xbundle_lookup(const struct ofbundle *ofbundle) | |
614 | { | |
615 | struct xbundle *xbundle; | |
616 | ||
5e6af486 EJ |
617 | if (!ofbundle) { |
618 | return NULL; | |
619 | } | |
620 | ||
46c88433 EJ |
621 | HMAP_FOR_EACH_IN_BUCKET (xbundle, hmap_node, hash_pointer(ofbundle, 0), |
622 | &xbundles) { | |
623 | if (xbundle->ofbundle == ofbundle) { | |
624 | return xbundle; | |
625 | } | |
626 | } | |
627 | return NULL; | |
628 | } | |
629 | ||
630 | static struct xport * | |
5e6af486 | 631 | xport_lookup(const struct ofport_dpif *ofport) |
46c88433 EJ |
632 | { |
633 | struct xport *xport; | |
634 | ||
5e6af486 EJ |
635 | if (!ofport) { |
636 | return NULL; | |
637 | } | |
638 | ||
46c88433 EJ |
639 | HMAP_FOR_EACH_IN_BUCKET (xport, hmap_node, hash_pointer(ofport, 0), |
640 | &xports) { | |
641 | if (xport->ofport == ofport) { | |
642 | return xport; | |
643 | } | |
644 | } | |
645 | return NULL; | |
646 | } | |
647 | ||
40085e56 EJ |
648 | static struct stp_port * |
649 | xport_get_stp_port(const struct xport *xport) | |
650 | { | |
92cf817b | 651 | return xport->xbridge->stp && xport->stp_port_no != -1 |
40085e56 EJ |
652 | ? stp_get_port(xport->xbridge->stp, xport->stp_port_no) |
653 | : NULL; | |
654 | } | |
9d189a50 EJ |
655 | |
656 | static enum stp_state | |
657 | xport_stp_learn_state(const struct xport *xport) | |
658 | { | |
40085e56 EJ |
659 | struct stp_port *sp = xport_get_stp_port(xport); |
660 | return stp_learn_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED); | |
9d189a50 EJ |
661 | } |
662 | ||
663 | static bool | |
664 | xport_stp_forward_state(const struct xport *xport) | |
665 | { | |
40085e56 EJ |
666 | struct stp_port *sp = xport_get_stp_port(xport); |
667 | return stp_forward_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED); | |
9d189a50 EJ |
668 | } |
669 | ||
670 | /* Returns true if STP should process 'flow'. Sets fields in 'wc' that | |
671 | * were used to make the determination.*/ | |
672 | static bool | |
673 | stp_should_process_flow(const struct flow *flow, struct flow_wildcards *wc) | |
674 | { | |
675 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
676 | return eth_addr_equals(flow->dl_dst, eth_addr_stp); | |
677 | } | |
678 | ||
679 | static void | |
680 | stp_process_packet(const struct xport *xport, const struct ofpbuf *packet) | |
681 | { | |
40085e56 | 682 | struct stp_port *sp = xport_get_stp_port(xport); |
9d189a50 EJ |
683 | struct ofpbuf payload = *packet; |
684 | struct eth_header *eth = payload.data; | |
9d189a50 EJ |
685 | |
686 | /* Sink packets on ports that have STP disabled when the bridge has | |
687 | * STP enabled. */ | |
688 | if (!sp || stp_port_get_state(sp) == STP_DISABLED) { | |
689 | return; | |
690 | } | |
691 | ||
692 | /* Trim off padding on payload. */ | |
693 | if (payload.size > ntohs(eth->eth_type) + ETH_HEADER_LEN) { | |
694 | payload.size = ntohs(eth->eth_type) + ETH_HEADER_LEN; | |
695 | } | |
696 | ||
697 | if (ofpbuf_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) { | |
698 | stp_received_bpdu(sp, payload.data, payload.size); | |
699 | } | |
700 | } | |
701 | ||
46c88433 EJ |
702 | static struct xport * |
703 | get_ofp_port(const struct xbridge *xbridge, ofp_port_t ofp_port) | |
704 | { | |
705 | struct xport *xport; | |
706 | ||
707 | HMAP_FOR_EACH_IN_BUCKET (xport, ofp_node, hash_ofp_port(ofp_port), | |
708 | &xbridge->xports) { | |
709 | if (xport->ofp_port == ofp_port) { | |
710 | return xport; | |
711 | } | |
712 | } | |
713 | return NULL; | |
714 | } | |
715 | ||
716 | static odp_port_t | |
717 | ofp_port_to_odp_port(const struct xbridge *xbridge, ofp_port_t ofp_port) | |
718 | { | |
719 | const struct xport *xport = get_ofp_port(xbridge, ofp_port); | |
720 | return xport ? xport->odp_port : ODPP_NONE; | |
721 | } | |
722 | ||
9583bc14 | 723 | static bool |
46c88433 | 724 | xbundle_trunks_vlan(const struct xbundle *bundle, uint16_t vlan) |
9583bc14 EJ |
725 | { |
726 | return (bundle->vlan_mode != PORT_VLAN_ACCESS | |
727 | && (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan))); | |
728 | } | |
729 | ||
730 | static bool | |
46c88433 EJ |
731 | xbundle_includes_vlan(const struct xbundle *xbundle, uint16_t vlan) |
732 | { | |
733 | return vlan == xbundle->vlan || xbundle_trunks_vlan(xbundle, vlan); | |
734 | } | |
735 | ||
736 | static mirror_mask_t | |
737 | xbundle_mirror_out(const struct xbridge *xbridge, struct xbundle *xbundle) | |
738 | { | |
739 | return xbundle != &ofpp_none_bundle | |
740 | ? mirror_bundle_out(xbridge->mbridge, xbundle->ofbundle) | |
741 | : 0; | |
742 | } | |
743 | ||
744 | static mirror_mask_t | |
745 | xbundle_mirror_src(const struct xbridge *xbridge, struct xbundle *xbundle) | |
9583bc14 | 746 | { |
46c88433 EJ |
747 | return xbundle != &ofpp_none_bundle |
748 | ? mirror_bundle_src(xbridge->mbridge, xbundle->ofbundle) | |
749 | : 0; | |
9583bc14 EJ |
750 | } |
751 | ||
46c88433 EJ |
752 | static mirror_mask_t |
753 | xbundle_mirror_dst(const struct xbridge *xbridge, struct xbundle *xbundle) | |
9583bc14 | 754 | { |
46c88433 EJ |
755 | return xbundle != &ofpp_none_bundle |
756 | ? mirror_bundle_dst(xbridge->mbridge, xbundle->ofbundle) | |
757 | : 0; | |
758 | } | |
759 | ||
760 | static struct xbundle * | |
761 | lookup_input_bundle(const struct xbridge *xbridge, ofp_port_t in_port, | |
762 | bool warn, struct xport **in_xportp) | |
763 | { | |
764 | struct xport *xport; | |
9583bc14 EJ |
765 | |
766 | /* Find the port and bundle for the received packet. */ | |
46c88433 EJ |
767 | xport = get_ofp_port(xbridge, in_port); |
768 | if (in_xportp) { | |
769 | *in_xportp = xport; | |
9583bc14 | 770 | } |
46c88433 EJ |
771 | if (xport && xport->xbundle) { |
772 | return xport->xbundle; | |
9583bc14 EJ |
773 | } |
774 | ||
775 | /* Special-case OFPP_NONE, which a controller may use as the ingress | |
776 | * port for traffic that it is sourcing. */ | |
777 | if (in_port == OFPP_NONE) { | |
3815d6c2 LS |
778 | ofpp_none_bundle.name = "OFPP_NONE"; |
779 | ofpp_none_bundle.vlan_mode = PORT_VLAN_TRUNK; | |
9583bc14 EJ |
780 | return &ofpp_none_bundle; |
781 | } | |
782 | ||
783 | /* Odd. A few possible reasons here: | |
784 | * | |
785 | * - We deleted a port but there are still a few packets queued up | |
786 | * from it. | |
787 | * | |
788 | * - Someone externally added a port (e.g. "ovs-dpctl add-if") that | |
789 | * we don't know about. | |
790 | * | |
791 | * - The ofproto client didn't configure the port as part of a bundle. | |
792 | * This is particularly likely to happen if a packet was received on the | |
793 | * port after it was created, but before the client had a chance to | |
794 | * configure its bundle. | |
795 | */ | |
796 | if (warn) { | |
797 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
798 | ||
799 | VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown " | |
46c88433 | 800 | "port %"PRIu16, xbridge->name, in_port); |
9583bc14 EJ |
801 | } |
802 | return NULL; | |
803 | } | |
804 | ||
805 | static void | |
806 | add_mirror_actions(struct xlate_ctx *ctx, const struct flow *orig_flow) | |
807 | { | |
46c88433 | 808 | const struct xbridge *xbridge = ctx->xbridge; |
9583bc14 | 809 | mirror_mask_t mirrors; |
46c88433 | 810 | struct xbundle *in_xbundle; |
9583bc14 EJ |
811 | uint16_t vlan; |
812 | uint16_t vid; | |
cdf5d3a5 EJ |
813 | |
814 | mirrors = ctx->xout->mirrors; | |
815 | ctx->xout->mirrors = 0; | |
9583bc14 | 816 | |
46c88433 EJ |
817 | in_xbundle = lookup_input_bundle(xbridge, orig_flow->in_port.ofp_port, |
818 | ctx->xin->packet != NULL, NULL); | |
819 | if (!in_xbundle) { | |
9583bc14 EJ |
820 | return; |
821 | } | |
46c88433 | 822 | mirrors |= xbundle_mirror_src(xbridge, in_xbundle); |
9583bc14 EJ |
823 | |
824 | /* Drop frames on bundles reserved for mirroring. */ | |
46c88433 | 825 | if (xbundle_mirror_out(xbridge, in_xbundle)) { |
9583bc14 EJ |
826 | if (ctx->xin->packet != NULL) { |
827 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
828 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port " | |
829 | "%s, which is reserved exclusively for mirroring", | |
46c88433 | 830 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 | 831 | } |
aaa0fbae | 832 | ofpbuf_clear(&ctx->xout->odp_actions); |
9583bc14 EJ |
833 | return; |
834 | } | |
835 | ||
836 | /* Check VLAN. */ | |
837 | vid = vlan_tci_to_vid(orig_flow->vlan_tci); | |
46c88433 | 838 | if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) { |
9583bc14 EJ |
839 | return; |
840 | } | |
46c88433 | 841 | vlan = input_vid_to_vlan(in_xbundle, vid); |
9583bc14 | 842 | |
9583bc14 EJ |
843 | if (!mirrors) { |
844 | return; | |
845 | } | |
846 | ||
847 | /* Restore the original packet before adding the mirror actions. */ | |
848 | ctx->xin->flow = *orig_flow; | |
849 | ||
850 | while (mirrors) { | |
ec7ceaed EJ |
851 | mirror_mask_t dup_mirrors; |
852 | struct ofbundle *out; | |
853 | unsigned long *vlans; | |
854 | bool vlan_mirrored; | |
855 | bool has_mirror; | |
856 | int out_vlan; | |
857 | ||
46c88433 | 858 | has_mirror = mirror_get(xbridge->mbridge, mirror_mask_ffs(mirrors) - 1, |
ec7ceaed EJ |
859 | &vlans, &dup_mirrors, &out, &out_vlan); |
860 | ovs_assert(has_mirror); | |
861 | ||
862 | if (vlans) { | |
9583bc14 EJ |
863 | ctx->xout->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK); |
864 | } | |
ec7ceaed EJ |
865 | vlan_mirrored = !vlans || bitmap_is_set(vlans, vlan); |
866 | free(vlans); | |
9583bc14 | 867 | |
ec7ceaed | 868 | if (!vlan_mirrored) { |
9583bc14 EJ |
869 | mirrors = zero_rightmost_1bit(mirrors); |
870 | continue; | |
871 | } | |
872 | ||
ec7ceaed EJ |
873 | mirrors &= ~dup_mirrors; |
874 | ctx->xout->mirrors |= dup_mirrors; | |
875 | if (out) { | |
46c88433 EJ |
876 | struct xbundle *out_xbundle = xbundle_lookup(out); |
877 | if (out_xbundle) { | |
878 | output_normal(ctx, out_xbundle, vlan); | |
879 | } | |
ec7ceaed | 880 | } else if (vlan != out_vlan |
9583bc14 | 881 | && !eth_addr_is_reserved(orig_flow->dl_dst)) { |
46c88433 | 882 | struct xbundle *xbundle; |
9583bc14 | 883 | |
46c88433 EJ |
884 | LIST_FOR_EACH (xbundle, list_node, &xbridge->xbundles) { |
885 | if (xbundle_includes_vlan(xbundle, out_vlan) | |
886 | && !xbundle_mirror_out(xbridge, xbundle)) { | |
887 | output_normal(ctx, xbundle, out_vlan); | |
9583bc14 EJ |
888 | } |
889 | } | |
890 | } | |
891 | } | |
892 | } | |
893 | ||
894 | /* Given 'vid', the VID obtained from the 802.1Q header that was received as | |
46c88433 | 895 | * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle', |
9583bc14 EJ |
896 | * the bundle on which the packet was received, returns the VLAN to which the |
897 | * packet belongs. | |
898 | * | |
899 | * Both 'vid' and the return value are in the range 0...4095. */ | |
900 | static uint16_t | |
46c88433 | 901 | input_vid_to_vlan(const struct xbundle *in_xbundle, uint16_t vid) |
9583bc14 | 902 | { |
46c88433 | 903 | switch (in_xbundle->vlan_mode) { |
9583bc14 | 904 | case PORT_VLAN_ACCESS: |
46c88433 | 905 | return in_xbundle->vlan; |
9583bc14 EJ |
906 | break; |
907 | ||
908 | case PORT_VLAN_TRUNK: | |
909 | return vid; | |
910 | ||
911 | case PORT_VLAN_NATIVE_UNTAGGED: | |
912 | case PORT_VLAN_NATIVE_TAGGED: | |
46c88433 | 913 | return vid ? vid : in_xbundle->vlan; |
9583bc14 EJ |
914 | |
915 | default: | |
916 | NOT_REACHED(); | |
917 | } | |
918 | } | |
919 | ||
46c88433 | 920 | /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'. |
9583bc14 EJ |
921 | * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs |
922 | * a warning. | |
923 | * | |
924 | * 'vid' should be the VID obtained from the 802.1Q header that was received as | |
925 | * part of a packet (specify 0 if there was no 802.1Q header), in the range | |
926 | * 0...4095. */ | |
927 | static bool | |
46c88433 | 928 | input_vid_is_valid(uint16_t vid, struct xbundle *in_xbundle, bool warn) |
9583bc14 EJ |
929 | { |
930 | /* Allow any VID on the OFPP_NONE port. */ | |
46c88433 | 931 | if (in_xbundle == &ofpp_none_bundle) { |
9583bc14 EJ |
932 | return true; |
933 | } | |
934 | ||
46c88433 | 935 | switch (in_xbundle->vlan_mode) { |
9583bc14 EJ |
936 | case PORT_VLAN_ACCESS: |
937 | if (vid) { | |
938 | if (warn) { | |
939 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
46c88433 | 940 | VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" tagged " |
9583bc14 | 941 | "packet received on port %s configured as VLAN " |
46c88433 EJ |
942 | "%"PRIu16" access port", vid, in_xbundle->name, |
943 | in_xbundle->vlan); | |
9583bc14 EJ |
944 | } |
945 | return false; | |
946 | } | |
947 | return true; | |
948 | ||
949 | case PORT_VLAN_NATIVE_UNTAGGED: | |
950 | case PORT_VLAN_NATIVE_TAGGED: | |
951 | if (!vid) { | |
952 | /* Port must always carry its native VLAN. */ | |
953 | return true; | |
954 | } | |
955 | /* Fall through. */ | |
956 | case PORT_VLAN_TRUNK: | |
46c88433 | 957 | if (!xbundle_includes_vlan(in_xbundle, vid)) { |
9583bc14 EJ |
958 | if (warn) { |
959 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
46c88433 | 960 | VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" packet " |
9583bc14 | 961 | "received on port %s not configured for trunking " |
46c88433 | 962 | "VLAN %"PRIu16, vid, in_xbundle->name, vid); |
9583bc14 EJ |
963 | } |
964 | return false; | |
965 | } | |
966 | return true; | |
967 | ||
968 | default: | |
969 | NOT_REACHED(); | |
970 | } | |
971 | ||
972 | } | |
973 | ||
974 | /* Given 'vlan', the VLAN that a packet belongs to, and | |
46c88433 | 975 | * 'out_xbundle', a bundle on which the packet is to be output, returns the VID |
9583bc14 EJ |
976 | * that should be included in the 802.1Q header. (If the return value is 0, |
977 | * then the 802.1Q header should only be included in the packet if there is a | |
978 | * nonzero PCP.) | |
979 | * | |
980 | * Both 'vlan' and the return value are in the range 0...4095. */ | |
981 | static uint16_t | |
46c88433 | 982 | output_vlan_to_vid(const struct xbundle *out_xbundle, uint16_t vlan) |
9583bc14 | 983 | { |
46c88433 | 984 | switch (out_xbundle->vlan_mode) { |
9583bc14 EJ |
985 | case PORT_VLAN_ACCESS: |
986 | return 0; | |
987 | ||
988 | case PORT_VLAN_TRUNK: | |
989 | case PORT_VLAN_NATIVE_TAGGED: | |
990 | return vlan; | |
991 | ||
992 | case PORT_VLAN_NATIVE_UNTAGGED: | |
46c88433 | 993 | return vlan == out_xbundle->vlan ? 0 : vlan; |
9583bc14 EJ |
994 | |
995 | default: | |
996 | NOT_REACHED(); | |
997 | } | |
998 | } | |
999 | ||
1000 | static void | |
46c88433 | 1001 | output_normal(struct xlate_ctx *ctx, const struct xbundle *out_xbundle, |
9583bc14 EJ |
1002 | uint16_t vlan) |
1003 | { | |
33bf9176 | 1004 | ovs_be16 *flow_tci = &ctx->xin->flow.vlan_tci; |
9583bc14 EJ |
1005 | uint16_t vid; |
1006 | ovs_be16 tci, old_tci; | |
46c88433 | 1007 | struct xport *xport; |
9583bc14 | 1008 | |
46c88433 EJ |
1009 | vid = output_vlan_to_vid(out_xbundle, vlan); |
1010 | if (list_is_empty(&out_xbundle->xports)) { | |
1011 | /* Partially configured bundle with no slaves. Drop the packet. */ | |
1012 | return; | |
1013 | } else if (!out_xbundle->bond) { | |
1014 | xport = CONTAINER_OF(list_front(&out_xbundle->xports), struct xport, | |
1015 | bundle_node); | |
9583bc14 | 1016 | } else { |
46c88433 EJ |
1017 | struct ofport_dpif *ofport; |
1018 | ||
1019 | ofport = bond_choose_output_slave(out_xbundle->bond, &ctx->xin->flow, | |
4a1b8f30 | 1020 | &ctx->xout->wc, vid); |
5e6af486 | 1021 | xport = xport_lookup(ofport); |
46c88433 EJ |
1022 | |
1023 | if (!xport) { | |
9583bc14 EJ |
1024 | /* No slaves enabled, so drop packet. */ |
1025 | return; | |
1026 | } | |
1027 | } | |
1028 | ||
33bf9176 | 1029 | old_tci = *flow_tci; |
9583bc14 | 1030 | tci = htons(vid); |
46c88433 | 1031 | if (tci || out_xbundle->use_priority_tags) { |
33bf9176 | 1032 | tci |= *flow_tci & htons(VLAN_PCP_MASK); |
9583bc14 EJ |
1033 | if (tci) { |
1034 | tci |= htons(VLAN_CFI); | |
1035 | } | |
1036 | } | |
33bf9176 | 1037 | *flow_tci = tci; |
9583bc14 | 1038 | |
46c88433 | 1039 | compose_output_action(ctx, xport->ofp_port); |
33bf9176 | 1040 | *flow_tci = old_tci; |
9583bc14 EJ |
1041 | } |
1042 | ||
1043 | /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after | |
1044 | * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to | |
1045 | * indicate this; newer upstream kernels use gratuitous ARP requests. */ | |
1046 | static bool | |
1047 | is_gratuitous_arp(const struct flow *flow, struct flow_wildcards *wc) | |
1048 | { | |
1049 | if (flow->dl_type != htons(ETH_TYPE_ARP)) { | |
1050 | return false; | |
1051 | } | |
1052 | ||
1053 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
1054 | if (!eth_addr_is_broadcast(flow->dl_dst)) { | |
1055 | return false; | |
1056 | } | |
1057 | ||
1058 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
1059 | if (flow->nw_proto == ARP_OP_REPLY) { | |
1060 | return true; | |
1061 | } else if (flow->nw_proto == ARP_OP_REQUEST) { | |
1062 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
1063 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
1064 | ||
1065 | return flow->nw_src == flow->nw_dst; | |
1066 | } else { | |
1067 | return false; | |
1068 | } | |
1069 | } | |
1070 | ||
ee047520 BP |
1071 | /* Checks whether a MAC learning update is necessary for MAC learning table |
1072 | * 'ml' given that a packet matching 'flow' was received on 'in_xbundle' in | |
1073 | * 'vlan'. | |
1074 | * | |
1075 | * Most packets processed through the MAC learning table do not actually | |
1076 | * change it in any way. This function requires only a read lock on the MAC | |
1077 | * learning table, so it is much cheaper in this common case. | |
1078 | * | |
1079 | * Keep the code here synchronized with that in update_learning_table__() | |
1080 | * below. */ | |
1081 | static bool | |
1082 | is_mac_learning_update_needed(const struct mac_learning *ml, | |
1083 | const struct flow *flow, | |
1084 | struct flow_wildcards *wc, | |
1085 | int vlan, struct xbundle *in_xbundle) | |
1086 | OVS_REQ_RDLOCK(ml->rwlock) | |
9583bc14 EJ |
1087 | { |
1088 | struct mac_entry *mac; | |
1089 | ||
ee047520 BP |
1090 | if (!mac_learning_may_learn(ml, flow->dl_src, vlan)) { |
1091 | return false; | |
1092 | } | |
1093 | ||
1094 | mac = mac_learning_lookup(ml, flow->dl_src, vlan); | |
1095 | if (!mac || mac_entry_age(ml, mac)) { | |
1096 | return true; | |
9583bc14 EJ |
1097 | } |
1098 | ||
ee047520 BP |
1099 | if (is_gratuitous_arp(flow, wc)) { |
1100 | /* We don't want to learn from gratuitous ARP packets that are | |
1101 | * reflected back over bond slaves so we lock the learning table. */ | |
1102 | if (!in_xbundle->bond) { | |
1103 | return true; | |
1104 | } else if (mac_entry_is_grat_arp_locked(mac)) { | |
1105 | return false; | |
1106 | } | |
1107 | } | |
1108 | ||
1109 | return mac->port.p != in_xbundle->ofbundle; | |
1110 | } | |
1111 | ||
1112 | ||
1113 | /* Updates MAC learning table 'ml' given that a packet matching 'flow' was | |
1114 | * received on 'in_xbundle' in 'vlan'. | |
1115 | * | |
1116 | * This code repeats all the checks in is_mac_learning_update_needed() because | |
1117 | * the lock was released between there and here and thus the MAC learning state | |
1118 | * could have changed. | |
1119 | * | |
1120 | * Keep the code here synchronized with that in is_mac_learning_update_needed() | |
1121 | * above. */ | |
1122 | static void | |
1123 | update_learning_table__(const struct xbridge *xbridge, | |
1124 | const struct flow *flow, struct flow_wildcards *wc, | |
1125 | int vlan, struct xbundle *in_xbundle) | |
1126 | OVS_REQ_WRLOCK(xbridge->ml->rwlock) | |
1127 | { | |
1128 | struct mac_entry *mac; | |
1129 | ||
46c88433 | 1130 | if (!mac_learning_may_learn(xbridge->ml, flow->dl_src, vlan)) { |
ee047520 | 1131 | return; |
9583bc14 EJ |
1132 | } |
1133 | ||
46c88433 | 1134 | mac = mac_learning_insert(xbridge->ml, flow->dl_src, vlan); |
9583bc14 EJ |
1135 | if (is_gratuitous_arp(flow, wc)) { |
1136 | /* We don't want to learn from gratuitous ARP packets that are | |
1137 | * reflected back over bond slaves so we lock the learning table. */ | |
46c88433 | 1138 | if (!in_xbundle->bond) { |
9583bc14 EJ |
1139 | mac_entry_set_grat_arp_lock(mac); |
1140 | } else if (mac_entry_is_grat_arp_locked(mac)) { | |
ee047520 | 1141 | return; |
9583bc14 EJ |
1142 | } |
1143 | } | |
1144 | ||
30618594 | 1145 | if (mac->port.p != in_xbundle->ofbundle) { |
9583bc14 EJ |
1146 | /* The log messages here could actually be useful in debugging, |
1147 | * so keep the rate limit relatively high. */ | |
1148 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300); | |
ee047520 | 1149 | |
9583bc14 EJ |
1150 | VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is " |
1151 | "on port %s in VLAN %d", | |
46c88433 EJ |
1152 | xbridge->name, ETH_ADDR_ARGS(flow->dl_src), |
1153 | in_xbundle->name, vlan); | |
9583bc14 | 1154 | |
46c88433 | 1155 | mac->port.p = in_xbundle->ofbundle; |
30618594 | 1156 | mac_learning_changed(xbridge->ml); |
9583bc14 | 1157 | } |
ee047520 BP |
1158 | } |
1159 | ||
1160 | static void | |
1161 | update_learning_table(const struct xbridge *xbridge, | |
1162 | const struct flow *flow, struct flow_wildcards *wc, | |
1163 | int vlan, struct xbundle *in_xbundle) | |
1164 | { | |
1165 | bool need_update; | |
1166 | ||
1167 | /* Don't learn the OFPP_NONE port. */ | |
1168 | if (in_xbundle == &ofpp_none_bundle) { | |
1169 | return; | |
1170 | } | |
1171 | ||
1172 | /* First try the common case: no change to MAC learning table. */ | |
1173 | ovs_rwlock_rdlock(&xbridge->ml->rwlock); | |
1174 | need_update = is_mac_learning_update_needed(xbridge->ml, flow, wc, vlan, | |
1175 | in_xbundle); | |
509c0149 | 1176 | ovs_rwlock_unlock(&xbridge->ml->rwlock); |
ee047520 BP |
1177 | |
1178 | if (need_update) { | |
1179 | /* Slow path: MAC learning table might need an update. */ | |
1180 | ovs_rwlock_wrlock(&xbridge->ml->rwlock); | |
1181 | update_learning_table__(xbridge, flow, wc, vlan, in_xbundle); | |
1182 | ovs_rwlock_unlock(&xbridge->ml->rwlock); | |
1183 | } | |
9583bc14 EJ |
1184 | } |
1185 | ||
46c88433 | 1186 | /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or |
9583bc14 EJ |
1187 | * dropped. Returns true if they may be forwarded, false if they should be |
1188 | * dropped. | |
1189 | * | |
46c88433 | 1190 | * 'in_port' must be the xport that corresponds to flow->in_port. |
9583bc14 EJ |
1191 | * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull). |
1192 | * | |
1193 | * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as | |
1194 | * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as | |
1195 | * checked by input_vid_is_valid(). | |
1196 | * | |
1197 | * May also add tags to '*tags', although the current implementation only does | |
1198 | * so in one special case. | |
1199 | */ | |
1200 | static bool | |
46c88433 | 1201 | is_admissible(struct xlate_ctx *ctx, struct xport *in_port, |
9583bc14 EJ |
1202 | uint16_t vlan) |
1203 | { | |
46c88433 EJ |
1204 | struct xbundle *in_xbundle = in_port->xbundle; |
1205 | const struct xbridge *xbridge = ctx->xbridge; | |
9583bc14 | 1206 | struct flow *flow = &ctx->xin->flow; |
9583bc14 EJ |
1207 | |
1208 | /* Drop frames for reserved multicast addresses | |
1209 | * only if forward_bpdu option is absent. */ | |
46c88433 | 1210 | if (!xbridge->forward_bpdu && eth_addr_is_reserved(flow->dl_dst)) { |
9583bc14 EJ |
1211 | xlate_report(ctx, "packet has reserved destination MAC, dropping"); |
1212 | return false; | |
1213 | } | |
1214 | ||
46c88433 | 1215 | if (in_xbundle->bond) { |
9583bc14 EJ |
1216 | struct mac_entry *mac; |
1217 | ||
46c88433 | 1218 | switch (bond_check_admissibility(in_xbundle->bond, in_port->ofport, |
4a1b8f30 | 1219 | flow->dl_dst)) { |
9583bc14 EJ |
1220 | case BV_ACCEPT: |
1221 | break; | |
1222 | ||
1223 | case BV_DROP: | |
1224 | xlate_report(ctx, "bonding refused admissibility, dropping"); | |
1225 | return false; | |
1226 | ||
1227 | case BV_DROP_IF_MOVED: | |
509c0149 | 1228 | ovs_rwlock_rdlock(&xbridge->ml->rwlock); |
30618594 | 1229 | mac = mac_learning_lookup(xbridge->ml, flow->dl_src, vlan); |
46c88433 | 1230 | if (mac && mac->port.p != in_xbundle->ofbundle && |
9583bc14 EJ |
1231 | (!is_gratuitous_arp(flow, &ctx->xout->wc) |
1232 | || mac_entry_is_grat_arp_locked(mac))) { | |
509c0149 | 1233 | ovs_rwlock_unlock(&xbridge->ml->rwlock); |
9583bc14 EJ |
1234 | xlate_report(ctx, "SLB bond thinks this packet looped back, " |
1235 | "dropping"); | |
1236 | return false; | |
1237 | } | |
509c0149 | 1238 | ovs_rwlock_unlock(&xbridge->ml->rwlock); |
9583bc14 EJ |
1239 | break; |
1240 | } | |
1241 | } | |
1242 | ||
1243 | return true; | |
1244 | } | |
1245 | ||
1246 | static void | |
1247 | xlate_normal(struct xlate_ctx *ctx) | |
1248 | { | |
33bf9176 BP |
1249 | struct flow_wildcards *wc = &ctx->xout->wc; |
1250 | struct flow *flow = &ctx->xin->flow; | |
46c88433 EJ |
1251 | struct xbundle *in_xbundle; |
1252 | struct xport *in_port; | |
9583bc14 | 1253 | struct mac_entry *mac; |
d6d5bbc9 | 1254 | void *mac_port; |
9583bc14 EJ |
1255 | uint16_t vlan; |
1256 | uint16_t vid; | |
1257 | ||
1258 | ctx->xout->has_normal = true; | |
1259 | ||
33bf9176 BP |
1260 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); |
1261 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
1dd35f8a | 1262 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
9583bc14 | 1263 | |
46c88433 EJ |
1264 | in_xbundle = lookup_input_bundle(ctx->xbridge, flow->in_port.ofp_port, |
1265 | ctx->xin->packet != NULL, &in_port); | |
1266 | if (!in_xbundle) { | |
9583bc14 EJ |
1267 | xlate_report(ctx, "no input bundle, dropping"); |
1268 | return; | |
1269 | } | |
1270 | ||
1271 | /* Drop malformed frames. */ | |
33bf9176 BP |
1272 | if (flow->dl_type == htons(ETH_TYPE_VLAN) && |
1273 | !(flow->vlan_tci & htons(VLAN_CFI))) { | |
9583bc14 EJ |
1274 | if (ctx->xin->packet != NULL) { |
1275 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
1276 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet with partial " | |
1277 | "VLAN tag received on port %s", | |
46c88433 | 1278 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 EJ |
1279 | } |
1280 | xlate_report(ctx, "partial VLAN tag, dropping"); | |
1281 | return; | |
1282 | } | |
1283 | ||
1284 | /* Drop frames on bundles reserved for mirroring. */ | |
46c88433 | 1285 | if (xbundle_mirror_out(ctx->xbridge, in_xbundle)) { |
9583bc14 EJ |
1286 | if (ctx->xin->packet != NULL) { |
1287 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
1288 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port " | |
1289 | "%s, which is reserved exclusively for mirroring", | |
46c88433 | 1290 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 EJ |
1291 | } |
1292 | xlate_report(ctx, "input port is mirror output port, dropping"); | |
1293 | return; | |
1294 | } | |
1295 | ||
1296 | /* Check VLAN. */ | |
33bf9176 | 1297 | vid = vlan_tci_to_vid(flow->vlan_tci); |
46c88433 | 1298 | if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) { |
9583bc14 EJ |
1299 | xlate_report(ctx, "disallowed VLAN VID for this input port, dropping"); |
1300 | return; | |
1301 | } | |
46c88433 | 1302 | vlan = input_vid_to_vlan(in_xbundle, vid); |
9583bc14 EJ |
1303 | |
1304 | /* Check other admissibility requirements. */ | |
1305 | if (in_port && !is_admissible(ctx, in_port, vlan)) { | |
1306 | return; | |
1307 | } | |
1308 | ||
1309 | /* Learn source MAC. */ | |
1310 | if (ctx->xin->may_learn) { | |
46c88433 | 1311 | update_learning_table(ctx->xbridge, flow, wc, vlan, in_xbundle); |
9583bc14 EJ |
1312 | } |
1313 | ||
1314 | /* Determine output bundle. */ | |
509c0149 | 1315 | ovs_rwlock_rdlock(&ctx->xbridge->ml->rwlock); |
30618594 | 1316 | mac = mac_learning_lookup(ctx->xbridge->ml, flow->dl_dst, vlan); |
d6d5bbc9 EJ |
1317 | mac_port = mac ? mac->port.p : NULL; |
1318 | ovs_rwlock_unlock(&ctx->xbridge->ml->rwlock); | |
1319 | ||
1320 | if (mac_port) { | |
1321 | struct xbundle *mac_xbundle = xbundle_lookup(mac_port); | |
46c88433 | 1322 | if (mac_xbundle && mac_xbundle != in_xbundle) { |
9583bc14 | 1323 | xlate_report(ctx, "forwarding to learned port"); |
46c88433 EJ |
1324 | output_normal(ctx, mac_xbundle, vlan); |
1325 | } else if (!mac_xbundle) { | |
1326 | xlate_report(ctx, "learned port is unknown, dropping"); | |
9583bc14 EJ |
1327 | } else { |
1328 | xlate_report(ctx, "learned port is input port, dropping"); | |
1329 | } | |
1330 | } else { | |
46c88433 | 1331 | struct xbundle *xbundle; |
9583bc14 EJ |
1332 | |
1333 | xlate_report(ctx, "no learned MAC for destination, flooding"); | |
46c88433 EJ |
1334 | LIST_FOR_EACH (xbundle, list_node, &ctx->xbridge->xbundles) { |
1335 | if (xbundle != in_xbundle | |
1336 | && xbundle_includes_vlan(xbundle, vlan) | |
1337 | && xbundle->floodable | |
1338 | && !xbundle_mirror_out(ctx->xbridge, xbundle)) { | |
1339 | output_normal(ctx, xbundle, vlan); | |
9583bc14 EJ |
1340 | } |
1341 | } | |
1342 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | /* Compose SAMPLE action for sFlow or IPFIX. The given probability is | |
1347 | * the number of packets out of UINT32_MAX to sample. The given | |
1348 | * cookie is passed back in the callback for each sampled packet. | |
1349 | */ | |
1350 | static size_t | |
46c88433 | 1351 | compose_sample_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1352 | struct ofpbuf *odp_actions, |
1353 | const struct flow *flow, | |
1354 | const uint32_t probability, | |
1355 | const union user_action_cookie *cookie, | |
1356 | const size_t cookie_size) | |
1357 | { | |
1358 | size_t sample_offset, actions_offset; | |
89a8a7f0 | 1359 | odp_port_t odp_port; |
9583bc14 | 1360 | int cookie_offset; |
89a8a7f0 | 1361 | uint32_t pid; |
9583bc14 EJ |
1362 | |
1363 | sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE); | |
1364 | ||
1365 | nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability); | |
1366 | ||
1367 | actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS); | |
89a8a7f0 EJ |
1368 | |
1369 | odp_port = ofp_port_to_odp_port(xbridge, flow->in_port.ofp_port); | |
1370 | pid = dpif_port_get_pid(xbridge->dpif, odp_port); | |
1371 | cookie_offset = odp_put_userspace_action(pid, cookie, cookie_size, odp_actions); | |
9583bc14 EJ |
1372 | |
1373 | nl_msg_end_nested(odp_actions, actions_offset); | |
1374 | nl_msg_end_nested(odp_actions, sample_offset); | |
1375 | return cookie_offset; | |
1376 | } | |
1377 | ||
1378 | static void | |
46c88433 EJ |
1379 | compose_sflow_cookie(const struct xbridge *xbridge, ovs_be16 vlan_tci, |
1380 | odp_port_t odp_port, unsigned int n_outputs, | |
1381 | union user_action_cookie *cookie) | |
9583bc14 EJ |
1382 | { |
1383 | int ifindex; | |
1384 | ||
1385 | cookie->type = USER_ACTION_COOKIE_SFLOW; | |
1386 | cookie->sflow.vlan_tci = vlan_tci; | |
1387 | ||
1388 | /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output | |
1389 | * port information") for the interpretation of cookie->output. */ | |
1390 | switch (n_outputs) { | |
1391 | case 0: | |
1392 | /* 0x40000000 | 256 means "packet dropped for unknown reason". */ | |
1393 | cookie->sflow.output = 0x40000000 | 256; | |
1394 | break; | |
1395 | ||
1396 | case 1: | |
46c88433 | 1397 | ifindex = dpif_sflow_odp_port_to_ifindex(xbridge->sflow, odp_port); |
9583bc14 EJ |
1398 | if (ifindex) { |
1399 | cookie->sflow.output = ifindex; | |
1400 | break; | |
1401 | } | |
1402 | /* Fall through. */ | |
1403 | default: | |
1404 | /* 0x80000000 means "multiple output ports. */ | |
1405 | cookie->sflow.output = 0x80000000 | n_outputs; | |
1406 | break; | |
1407 | } | |
1408 | } | |
1409 | ||
1410 | /* Compose SAMPLE action for sFlow bridge sampling. */ | |
1411 | static size_t | |
46c88433 | 1412 | compose_sflow_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1413 | struct ofpbuf *odp_actions, |
1414 | const struct flow *flow, | |
4e022ec0 | 1415 | odp_port_t odp_port) |
9583bc14 EJ |
1416 | { |
1417 | uint32_t probability; | |
1418 | union user_action_cookie cookie; | |
1419 | ||
46c88433 | 1420 | if (!xbridge->sflow || flow->in_port.ofp_port == OFPP_NONE) { |
9583bc14 EJ |
1421 | return 0; |
1422 | } | |
1423 | ||
46c88433 EJ |
1424 | probability = dpif_sflow_get_probability(xbridge->sflow); |
1425 | compose_sflow_cookie(xbridge, htons(0), odp_port, | |
4e022ec0 | 1426 | odp_port == ODPP_NONE ? 0 : 1, &cookie); |
9583bc14 | 1427 | |
46c88433 | 1428 | return compose_sample_action(xbridge, odp_actions, flow, probability, |
9583bc14 EJ |
1429 | &cookie, sizeof cookie.sflow); |
1430 | } | |
1431 | ||
1432 | static void | |
1433 | compose_flow_sample_cookie(uint16_t probability, uint32_t collector_set_id, | |
1434 | uint32_t obs_domain_id, uint32_t obs_point_id, | |
1435 | union user_action_cookie *cookie) | |
1436 | { | |
1437 | cookie->type = USER_ACTION_COOKIE_FLOW_SAMPLE; | |
1438 | cookie->flow_sample.probability = probability; | |
1439 | cookie->flow_sample.collector_set_id = collector_set_id; | |
1440 | cookie->flow_sample.obs_domain_id = obs_domain_id; | |
1441 | cookie->flow_sample.obs_point_id = obs_point_id; | |
1442 | } | |
1443 | ||
1444 | static void | |
1445 | compose_ipfix_cookie(union user_action_cookie *cookie) | |
1446 | { | |
1447 | cookie->type = USER_ACTION_COOKIE_IPFIX; | |
1448 | } | |
1449 | ||
1450 | /* Compose SAMPLE action for IPFIX bridge sampling. */ | |
1451 | static void | |
46c88433 | 1452 | compose_ipfix_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1453 | struct ofpbuf *odp_actions, |
1454 | const struct flow *flow) | |
1455 | { | |
1456 | uint32_t probability; | |
1457 | union user_action_cookie cookie; | |
1458 | ||
46c88433 | 1459 | if (!xbridge->ipfix || flow->in_port.ofp_port == OFPP_NONE) { |
9583bc14 EJ |
1460 | return; |
1461 | } | |
1462 | ||
46c88433 | 1463 | probability = dpif_ipfix_get_bridge_exporter_probability(xbridge->ipfix); |
9583bc14 EJ |
1464 | compose_ipfix_cookie(&cookie); |
1465 | ||
46c88433 | 1466 | compose_sample_action(xbridge, odp_actions, flow, probability, |
9583bc14 EJ |
1467 | &cookie, sizeof cookie.ipfix); |
1468 | } | |
1469 | ||
1470 | /* SAMPLE action for sFlow must be first action in any given list of | |
1471 | * actions. At this point we do not have all information required to | |
1472 | * build it. So try to build sample action as complete as possible. */ | |
1473 | static void | |
1474 | add_sflow_action(struct xlate_ctx *ctx) | |
1475 | { | |
46c88433 | 1476 | ctx->user_cookie_offset = compose_sflow_action(ctx->xbridge, |
9583bc14 | 1477 | &ctx->xout->odp_actions, |
4e022ec0 | 1478 | &ctx->xin->flow, ODPP_NONE); |
9583bc14 EJ |
1479 | ctx->sflow_odp_port = 0; |
1480 | ctx->sflow_n_outputs = 0; | |
1481 | } | |
1482 | ||
1483 | /* SAMPLE action for IPFIX must be 1st or 2nd action in any given list | |
1484 | * of actions, eventually after the SAMPLE action for sFlow. */ | |
1485 | static void | |
1486 | add_ipfix_action(struct xlate_ctx *ctx) | |
1487 | { | |
46c88433 | 1488 | compose_ipfix_action(ctx->xbridge, &ctx->xout->odp_actions, |
9583bc14 EJ |
1489 | &ctx->xin->flow); |
1490 | } | |
1491 | ||
1492 | /* Fix SAMPLE action according to data collected while composing ODP actions. | |
1493 | * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested | |
1494 | * USERSPACE action's user-cookie which is required for sflow. */ | |
1495 | static void | |
1496 | fix_sflow_action(struct xlate_ctx *ctx) | |
1497 | { | |
1498 | const struct flow *base = &ctx->base_flow; | |
1499 | union user_action_cookie *cookie; | |
1500 | ||
1501 | if (!ctx->user_cookie_offset) { | |
1502 | return; | |
1503 | } | |
1504 | ||
1505 | cookie = ofpbuf_at(&ctx->xout->odp_actions, ctx->user_cookie_offset, | |
1506 | sizeof cookie->sflow); | |
1507 | ovs_assert(cookie->type == USER_ACTION_COOKIE_SFLOW); | |
1508 | ||
46c88433 | 1509 | compose_sflow_cookie(ctx->xbridge, base->vlan_tci, |
9583bc14 EJ |
1510 | ctx->sflow_odp_port, ctx->sflow_n_outputs, cookie); |
1511 | } | |
1512 | ||
db7d4e46 | 1513 | static enum slow_path_reason |
642dc74d | 1514 | process_special(struct xlate_ctx *ctx, const struct flow *flow, |
46c88433 | 1515 | const struct xport *xport, const struct ofpbuf *packet) |
db7d4e46 | 1516 | { |
642dc74d | 1517 | struct flow_wildcards *wc = &ctx->xout->wc; |
46c88433 | 1518 | const struct xbridge *xbridge = ctx->xbridge; |
642dc74d | 1519 | |
46c88433 | 1520 | if (!xport) { |
db7d4e46 | 1521 | return 0; |
46c88433 | 1522 | } else if (xport->cfm && cfm_should_process_flow(xport->cfm, flow, wc)) { |
db7d4e46 | 1523 | if (packet) { |
46c88433 | 1524 | cfm_process_heartbeat(xport->cfm, packet); |
db7d4e46 JP |
1525 | } |
1526 | return SLOW_CFM; | |
fab52e16 | 1527 | } else if (xport->bfd && bfd_should_process_flow(xport->bfd, flow, wc)) { |
db7d4e46 | 1528 | if (packet) { |
46c88433 | 1529 | bfd_process_packet(xport->bfd, flow, packet); |
db7d4e46 JP |
1530 | } |
1531 | return SLOW_BFD; | |
46c88433 | 1532 | } else if (xport->xbundle && xport->xbundle->lacp |
db7d4e46 JP |
1533 | && flow->dl_type == htons(ETH_TYPE_LACP)) { |
1534 | if (packet) { | |
46c88433 | 1535 | lacp_process_packet(xport->xbundle->lacp, xport->ofport, packet); |
db7d4e46 JP |
1536 | } |
1537 | return SLOW_LACP; | |
9d189a50 | 1538 | } else if (xbridge->stp && stp_should_process_flow(flow, wc)) { |
db7d4e46 | 1539 | if (packet) { |
9d189a50 | 1540 | stp_process_packet(xport, packet); |
db7d4e46 JP |
1541 | } |
1542 | return SLOW_STP; | |
1543 | } else { | |
1544 | return 0; | |
1545 | } | |
1546 | } | |
1547 | ||
9583bc14 | 1548 | static void |
4e022ec0 | 1549 | compose_output_action__(struct xlate_ctx *ctx, ofp_port_t ofp_port, |
9583bc14 EJ |
1550 | bool check_stp) |
1551 | { | |
46c88433 | 1552 | const struct xport *xport = get_ofp_port(ctx->xbridge, ofp_port); |
1dd35f8a | 1553 | struct flow_wildcards *wc = &ctx->xout->wc; |
33bf9176 | 1554 | struct flow *flow = &ctx->xin->flow; |
9583bc14 | 1555 | ovs_be16 flow_vlan_tci; |
1362e248 | 1556 | uint32_t flow_pkt_mark; |
9583bc14 | 1557 | uint8_t flow_nw_tos; |
4e022ec0 | 1558 | odp_port_t out_port, odp_port; |
ca077186 | 1559 | uint8_t dscp; |
9583bc14 EJ |
1560 | |
1561 | /* If 'struct flow' gets additional metadata, we'll need to zero it out | |
1562 | * before traversing a patch port. */ | |
dc235f7f | 1563 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 22); |
9583bc14 | 1564 | |
46c88433 | 1565 | if (!xport) { |
9583bc14 EJ |
1566 | xlate_report(ctx, "Nonexistent output port"); |
1567 | return; | |
46c88433 | 1568 | } else if (xport->config & OFPUTIL_PC_NO_FWD) { |
9583bc14 EJ |
1569 | xlate_report(ctx, "OFPPC_NO_FWD set, skipping output"); |
1570 | return; | |
9d189a50 | 1571 | } else if (check_stp && !xport_stp_forward_state(xport)) { |
9583bc14 EJ |
1572 | xlate_report(ctx, "STP not in forwarding state, skipping output"); |
1573 | return; | |
1574 | } | |
1575 | ||
46c88433 EJ |
1576 | if (mbridge_has_mirrors(ctx->xbridge->mbridge) && xport->xbundle) { |
1577 | ctx->xout->mirrors |= xbundle_mirror_dst(xport->xbundle->xbridge, | |
1578 | xport->xbundle); | |
cdf5d3a5 EJ |
1579 | } |
1580 | ||
46c88433 EJ |
1581 | if (xport->peer) { |
1582 | const struct xport *peer = xport->peer; | |
9583bc14 | 1583 | struct flow old_flow = ctx->xin->flow; |
9583bc14 | 1584 | enum slow_path_reason special; |
9583bc14 | 1585 | |
46c88433 EJ |
1586 | ctx->xbridge = peer->xbridge; |
1587 | flow->in_port.ofp_port = peer->ofp_port; | |
33bf9176 BP |
1588 | flow->metadata = htonll(0); |
1589 | memset(&flow->tunnel, 0, sizeof flow->tunnel); | |
1590 | memset(flow->regs, 0, sizeof flow->regs); | |
9583bc14 | 1591 | |
642dc74d | 1592 | special = process_special(ctx, &ctx->xin->flow, peer, |
9583bc14 EJ |
1593 | ctx->xin->packet); |
1594 | if (special) { | |
04594cd5 | 1595 | ctx->xout->slow |= special; |
ddd3c975 | 1596 | } else if (may_receive(peer, ctx)) { |
9d189a50 | 1597 | if (xport_stp_forward_state(peer)) { |
4e022ec0 | 1598 | xlate_table_action(ctx, flow->in_port.ofp_port, 0, true); |
9583bc14 EJ |
1599 | } else { |
1600 | /* Forwarding is disabled by STP. Let OFPP_NORMAL and the | |
1601 | * learning action look at the packet, then drop it. */ | |
1602 | struct flow old_base_flow = ctx->base_flow; | |
1603 | size_t old_size = ctx->xout->odp_actions.size; | |
cdf5d3a5 | 1604 | mirror_mask_t old_mirrors = ctx->xout->mirrors; |
4e022ec0 | 1605 | xlate_table_action(ctx, flow->in_port.ofp_port, 0, true); |
cdf5d3a5 | 1606 | ctx->xout->mirrors = old_mirrors; |
9583bc14 EJ |
1607 | ctx->base_flow = old_base_flow; |
1608 | ctx->xout->odp_actions.size = old_size; | |
1609 | } | |
1610 | } | |
1611 | ||
1612 | ctx->xin->flow = old_flow; | |
832554e3 | 1613 | ctx->xbridge = xport->xbridge; |
9583bc14 EJ |
1614 | |
1615 | if (ctx->xin->resubmit_stats) { | |
46c88433 EJ |
1616 | netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats); |
1617 | netdev_vport_inc_rx(peer->netdev, ctx->xin->resubmit_stats); | |
9583bc14 EJ |
1618 | } |
1619 | ||
1620 | return; | |
1621 | } | |
1622 | ||
33bf9176 | 1623 | flow_vlan_tci = flow->vlan_tci; |
1362e248 | 1624 | flow_pkt_mark = flow->pkt_mark; |
33bf9176 | 1625 | flow_nw_tos = flow->nw_tos; |
9583bc14 | 1626 | |
55954f6e | 1627 | if (dscp_from_skb_priority(xport, flow->skb_priority, &dscp)) { |
1dd35f8a | 1628 | wc->masks.nw_tos |= IP_ECN_MASK; |
33bf9176 | 1629 | flow->nw_tos &= ~IP_DSCP_MASK; |
ca077186 | 1630 | flow->nw_tos |= dscp; |
9583bc14 EJ |
1631 | } |
1632 | ||
46c88433 | 1633 | if (xport->is_tunnel) { |
9583bc14 EJ |
1634 | /* Save tunnel metadata so that changes made due to |
1635 | * the Logical (tunnel) Port are not visible for any further | |
1636 | * matches, while explicit set actions on tunnel metadata are. | |
1637 | */ | |
33bf9176 | 1638 | struct flow_tnl flow_tnl = flow->tunnel; |
46c88433 | 1639 | odp_port = tnl_port_send(xport->ofport, flow, &ctx->xout->wc); |
4e022ec0 | 1640 | if (odp_port == ODPP_NONE) { |
9583bc14 EJ |
1641 | xlate_report(ctx, "Tunneling decided against output"); |
1642 | goto out; /* restore flow_nw_tos */ | |
1643 | } | |
33bf9176 | 1644 | if (flow->tunnel.ip_dst == ctx->orig_tunnel_ip_dst) { |
9583bc14 EJ |
1645 | xlate_report(ctx, "Not tunneling to our own address"); |
1646 | goto out; /* restore flow_nw_tos */ | |
1647 | } | |
1648 | if (ctx->xin->resubmit_stats) { | |
46c88433 | 1649 | netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats); |
9583bc14 EJ |
1650 | } |
1651 | out_port = odp_port; | |
33bf9176 | 1652 | commit_odp_tunnel_action(flow, &ctx->base_flow, |
9583bc14 | 1653 | &ctx->xout->odp_actions); |
33bf9176 | 1654 | flow->tunnel = flow_tnl; /* Restore tunnel metadata */ |
9583bc14 | 1655 | } else { |
4e022ec0 | 1656 | ofp_port_t vlandev_port; |
1dd35f8a | 1657 | |
46c88433 EJ |
1658 | odp_port = xport->odp_port; |
1659 | if (ofproto_has_vlan_splinters(ctx->xbridge->ofproto)) { | |
1dd35f8a JP |
1660 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
1661 | } | |
46c88433 | 1662 | vlandev_port = vsp_realdev_to_vlandev(ctx->xbridge->ofproto, ofp_port, |
33bf9176 | 1663 | flow->vlan_tci); |
9583bc14 EJ |
1664 | if (vlandev_port == ofp_port) { |
1665 | out_port = odp_port; | |
1666 | } else { | |
46c88433 | 1667 | out_port = ofp_port_to_odp_port(ctx->xbridge, vlandev_port); |
33bf9176 | 1668 | flow->vlan_tci = htons(0); |
9583bc14 | 1669 | } |
9583bc14 | 1670 | } |
9583bc14 | 1671 | |
4e022ec0 | 1672 | if (out_port != ODPP_NONE) { |
7fd91025 BP |
1673 | ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow, |
1674 | &ctx->xout->odp_actions, | |
1675 | &ctx->xout->wc, | |
1676 | &ctx->mpls_depth_delta); | |
4e022ec0 AW |
1677 | nl_msg_put_odp_port(&ctx->xout->odp_actions, OVS_ACTION_ATTR_OUTPUT, |
1678 | out_port); | |
9583bc14 | 1679 | |
6cbbf4fa EJ |
1680 | ctx->sflow_odp_port = odp_port; |
1681 | ctx->sflow_n_outputs++; | |
1682 | ctx->xout->nf_output_iface = ofp_port; | |
1683 | } | |
1684 | ||
1685 | out: | |
9583bc14 | 1686 | /* Restore flow */ |
33bf9176 | 1687 | flow->vlan_tci = flow_vlan_tci; |
1362e248 | 1688 | flow->pkt_mark = flow_pkt_mark; |
33bf9176 | 1689 | flow->nw_tos = flow_nw_tos; |
9583bc14 EJ |
1690 | } |
1691 | ||
1692 | static void | |
4e022ec0 | 1693 | compose_output_action(struct xlate_ctx *ctx, ofp_port_t ofp_port) |
9583bc14 EJ |
1694 | { |
1695 | compose_output_action__(ctx, ofp_port, true); | |
1696 | } | |
1697 | ||
bb61b33d BP |
1698 | static void |
1699 | xlate_recursively(struct xlate_ctx *ctx, struct rule_dpif *rule) | |
bb61b33d BP |
1700 | { |
1701 | struct rule_dpif *old_rule = ctx->rule; | |
6f00e29b | 1702 | struct rule_actions *actions; |
bb61b33d BP |
1703 | |
1704 | if (ctx->xin->resubmit_stats) { | |
70742c7f | 1705 | rule_dpif_credit_stats(rule, ctx->xin->resubmit_stats); |
bb61b33d BP |
1706 | } |
1707 | ||
98b07853 | 1708 | ctx->resubmits++; |
bb61b33d BP |
1709 | ctx->recurse++; |
1710 | ctx->rule = rule; | |
6f00e29b BP |
1711 | actions = rule_dpif_get_actions(rule); |
1712 | do_xlate_actions(actions->ofpacts, actions->ofpacts_len, ctx); | |
1713 | rule_actions_unref(actions); | |
bb61b33d BP |
1714 | ctx->rule = old_rule; |
1715 | ctx->recurse--; | |
bb61b33d BP |
1716 | } |
1717 | ||
bd3240ba SH |
1718 | static bool |
1719 | xlate_resubmit_resource_check(struct xlate_ctx *ctx) | |
9583bc14 | 1720 | { |
98b07853 BP |
1721 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); |
1722 | ||
1723 | if (ctx->recurse >= MAX_RESUBMIT_RECURSION) { | |
1724 | VLOG_ERR_RL(&rl, "resubmit actions recursed over %d times", | |
1725 | MAX_RESUBMIT_RECURSION); | |
1726 | } else if (ctx->resubmits >= MAX_RESUBMITS) { | |
1727 | VLOG_ERR_RL(&rl, "over %d resubmit actions", MAX_RESUBMITS); | |
1728 | } else if (ctx->xout->odp_actions.size > UINT16_MAX) { | |
1729 | VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of actions"); | |
1730 | } else if (ctx->stack.size >= 65536) { | |
1731 | VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of stack"); | |
1732 | } else { | |
bd3240ba SH |
1733 | return true; |
1734 | } | |
1735 | ||
1736 | return false; | |
1737 | } | |
1738 | ||
1739 | static void | |
1740 | xlate_table_action(struct xlate_ctx *ctx, | |
1741 | ofp_port_t in_port, uint8_t table_id, bool may_packet_in) | |
1742 | { | |
1743 | if (xlate_resubmit_resource_check(ctx)) { | |
9583bc14 | 1744 | struct rule_dpif *rule; |
4e022ec0 | 1745 | ofp_port_t old_in_port = ctx->xin->flow.in_port.ofp_port; |
9583bc14 EJ |
1746 | uint8_t old_table_id = ctx->table_id; |
1747 | ||
1748 | ctx->table_id = table_id; | |
1749 | ||
bb61b33d BP |
1750 | /* Look up a flow with 'in_port' as the input port. Then restore the |
1751 | * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will | |
1752 | * have surprising behavior). */ | |
4e022ec0 | 1753 | ctx->xin->flow.in_port.ofp_port = in_port; |
a2143702 BP |
1754 | rule_dpif_lookup_in_table(ctx->xbridge->ofproto, |
1755 | &ctx->xin->flow, &ctx->xout->wc, | |
1756 | table_id, &rule); | |
4e022ec0 | 1757 | ctx->xin->flow.in_port.ofp_port = old_in_port; |
9583bc14 | 1758 | |
ad3efdcb EJ |
1759 | if (ctx->xin->resubmit_hook) { |
1760 | ctx->xin->resubmit_hook(ctx->xin, rule, ctx->recurse); | |
1761 | } | |
1762 | ||
a2143702 | 1763 | if (!rule && may_packet_in) { |
ad3efdcb EJ |
1764 | struct xport *xport; |
1765 | ||
ad3efdcb EJ |
1766 | /* XXX |
1767 | * check if table configuration flags | |
1768 | * OFPTC_TABLE_MISS_CONTROLLER, default. | |
1769 | * OFPTC_TABLE_MISS_CONTINUE, | |
1770 | * OFPTC_TABLE_MISS_DROP | |
1771 | * When OF1.0, OFPTC_TABLE_MISS_CONTINUE is used. What to do? */ | |
1772 | xport = get_ofp_port(ctx->xbridge, ctx->xin->flow.in_port.ofp_port); | |
70742c7f EJ |
1773 | choose_miss_rule(xport ? xport->config : 0, |
1774 | ctx->xbridge->miss_rule, | |
1775 | ctx->xbridge->no_packet_in_rule, &rule); | |
a2143702 BP |
1776 | } |
1777 | if (rule) { | |
bb61b33d | 1778 | xlate_recursively(ctx, rule); |
a2143702 | 1779 | rule_dpif_unref(rule); |
ad3efdcb EJ |
1780 | } |
1781 | ||
9583bc14 | 1782 | ctx->table_id = old_table_id; |
98b07853 | 1783 | return; |
9583bc14 | 1784 | } |
98b07853 BP |
1785 | |
1786 | ctx->exit = true; | |
9583bc14 EJ |
1787 | } |
1788 | ||
f4fb341b SH |
1789 | static void |
1790 | xlate_group_bucket(struct xlate_ctx *ctx, const struct ofputil_bucket *bucket) | |
1791 | { | |
1792 | uint64_t action_list_stub[1024 / 8]; | |
1793 | struct ofpbuf action_list, action_set; | |
1794 | ||
1795 | ofpbuf_use_const(&action_set, bucket->ofpacts, bucket->ofpacts_len); | |
1796 | ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub); | |
1797 | ||
1798 | ofpacts_execute_action_set(&action_list, &action_set); | |
1799 | ctx->recurse++; | |
1800 | do_xlate_actions(action_list.data, action_list.size, ctx); | |
1801 | ctx->recurse--; | |
1802 | ||
1803 | ofpbuf_uninit(&action_set); | |
1804 | ofpbuf_uninit(&action_list); | |
1805 | } | |
1806 | ||
1807 | static void | |
1808 | xlate_all_group(struct xlate_ctx *ctx, struct group_dpif *group) | |
1809 | { | |
1810 | const struct ofputil_bucket *bucket; | |
1811 | const struct list *buckets; | |
1812 | struct flow old_flow = ctx->xin->flow; | |
1813 | ||
1814 | group_dpif_get_buckets(group, &buckets); | |
1815 | ||
1816 | LIST_FOR_EACH (bucket, list_node, buckets) { | |
1817 | xlate_group_bucket(ctx, bucket); | |
1818 | /* Roll back flow to previous state. | |
1819 | * This is equivalent to cloning the packet for each bucket. | |
1820 | * | |
1821 | * As a side effect any subsequently applied actions will | |
1822 | * also effectively be applied to a clone of the packet taken | |
1823 | * just before applying the all or indirect group. */ | |
1824 | ctx->xin->flow = old_flow; | |
1825 | } | |
1826 | } | |
1827 | ||
1828 | static void | |
1829 | xlate_group_action__(struct xlate_ctx *ctx, struct group_dpif *group) | |
1830 | { | |
1831 | switch (group_dpif_get_type(group)) { | |
1832 | case OFPGT11_ALL: | |
1833 | case OFPGT11_INDIRECT: | |
1834 | xlate_all_group(ctx, group); | |
1835 | break; | |
1836 | case OFPGT11_SELECT: | |
1837 | case OFPGT11_FF: | |
1838 | /* XXX not yet implemented */ | |
1839 | break; | |
1840 | default: | |
1841 | NOT_REACHED(); | |
1842 | } | |
1843 | group_dpif_release(group); | |
1844 | } | |
1845 | ||
1846 | static bool | |
1847 | xlate_group_action(struct xlate_ctx *ctx, uint32_t group_id) | |
1848 | { | |
1849 | if (xlate_resubmit_resource_check(ctx)) { | |
1850 | struct group_dpif *group; | |
1851 | bool got_group; | |
1852 | ||
1853 | got_group = group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group); | |
1854 | if (got_group) { | |
1855 | xlate_group_action__(ctx, group); | |
1856 | } else { | |
1857 | return true; | |
1858 | } | |
1859 | } | |
1860 | ||
1861 | return false; | |
1862 | } | |
1863 | ||
9583bc14 EJ |
1864 | static void |
1865 | xlate_ofpact_resubmit(struct xlate_ctx *ctx, | |
1866 | const struct ofpact_resubmit *resubmit) | |
1867 | { | |
4e022ec0 | 1868 | ofp_port_t in_port; |
9583bc14 EJ |
1869 | uint8_t table_id; |
1870 | ||
1871 | in_port = resubmit->in_port; | |
1872 | if (in_port == OFPP_IN_PORT) { | |
4e022ec0 | 1873 | in_port = ctx->xin->flow.in_port.ofp_port; |
9583bc14 EJ |
1874 | } |
1875 | ||
1876 | table_id = resubmit->table_id; | |
1877 | if (table_id == 255) { | |
1878 | table_id = ctx->table_id; | |
1879 | } | |
1880 | ||
1881 | xlate_table_action(ctx, in_port, table_id, false); | |
1882 | } | |
1883 | ||
1884 | static void | |
1885 | flood_packets(struct xlate_ctx *ctx, bool all) | |
1886 | { | |
46c88433 | 1887 | const struct xport *xport; |
9583bc14 | 1888 | |
46c88433 EJ |
1889 | HMAP_FOR_EACH (xport, ofp_node, &ctx->xbridge->xports) { |
1890 | if (xport->ofp_port == ctx->xin->flow.in_port.ofp_port) { | |
9583bc14 EJ |
1891 | continue; |
1892 | } | |
1893 | ||
1894 | if (all) { | |
46c88433 EJ |
1895 | compose_output_action__(ctx, xport->ofp_port, false); |
1896 | } else if (!(xport->config & OFPUTIL_PC_NO_FLOOD)) { | |
1897 | compose_output_action(ctx, xport->ofp_port); | |
9583bc14 EJ |
1898 | } |
1899 | } | |
1900 | ||
1901 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
1902 | } | |
1903 | ||
1904 | static void | |
1905 | execute_controller_action(struct xlate_ctx *ctx, int len, | |
1906 | enum ofp_packet_in_reason reason, | |
1907 | uint16_t controller_id) | |
1908 | { | |
0fb7792a | 1909 | struct ofproto_packet_in *pin; |
9583bc14 EJ |
1910 | struct ofpbuf *packet; |
1911 | struct flow key; | |
1912 | ||
04594cd5 | 1913 | ctx->xout->slow |= SLOW_CONTROLLER; |
9583bc14 EJ |
1914 | if (!ctx->xin->packet) { |
1915 | return; | |
1916 | } | |
1917 | ||
1918 | packet = ofpbuf_clone(ctx->xin->packet); | |
1919 | ||
1920 | key.skb_priority = 0; | |
1362e248 | 1921 | key.pkt_mark = 0; |
9583bc14 EJ |
1922 | memset(&key.tunnel, 0, sizeof key.tunnel); |
1923 | ||
7fd91025 BP |
1924 | ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow, |
1925 | &ctx->xout->odp_actions, | |
1926 | &ctx->xout->wc, | |
1927 | &ctx->mpls_depth_delta); | |
9583bc14 EJ |
1928 | |
1929 | odp_execute_actions(NULL, packet, &key, ctx->xout->odp_actions.data, | |
1930 | ctx->xout->odp_actions.size, NULL, NULL); | |
1931 | ||
ada3a58d | 1932 | pin = xmalloc(sizeof *pin); |
0fb7792a BP |
1933 | pin->up.packet_len = packet->size; |
1934 | pin->up.packet = ofpbuf_steal_data(packet); | |
1935 | pin->up.reason = reason; | |
0fb7792a | 1936 | pin->up.table_id = ctx->table_id; |
d4fa4e79 BP |
1937 | pin->up.cookie = (ctx->rule |
1938 | ? rule_dpif_get_flow_cookie(ctx->rule) | |
1939 | : OVS_BE64_MAX); | |
0fb7792a | 1940 | |
0fb7792a | 1941 | flow_get_metadata(&ctx->xin->flow, &pin->up.fmd); |
9583bc14 | 1942 | |
f11c7538 | 1943 | pin->controller_id = controller_id; |
d38a3c7b | 1944 | pin->send_len = len; |
cfa955b0 YT |
1945 | pin->generated_by_table_miss = (ctx->rule |
1946 | && rule_dpif_is_table_miss(ctx->rule)); | |
ada3a58d | 1947 | ofproto_dpif_send_packet_in(ctx->xbridge->ofproto, pin); |
9583bc14 EJ |
1948 | ofpbuf_delete(packet); |
1949 | } | |
1950 | ||
b0a17866 | 1951 | static bool |
9cfef3d0 | 1952 | compose_mpls_push_action(struct xlate_ctx *ctx, ovs_be16 eth_type) |
9583bc14 | 1953 | { |
33bf9176 BP |
1954 | struct flow_wildcards *wc = &ctx->xout->wc; |
1955 | struct flow *flow = &ctx->xin->flow; | |
1956 | ||
9583bc14 EJ |
1957 | ovs_assert(eth_type_mpls(eth_type)); |
1958 | ||
b0a17866 SH |
1959 | /* If mpls_depth_delta is negative then an MPLS POP action has been |
1960 | * composed and the resulting MPLS label stack is unknown. This means | |
1961 | * an MPLS PUSH action can't be composed as it needs to know either the | |
1962 | * top-most MPLS LSE to use as a template for the new MPLS LSE, or that | |
1963 | * there is no MPLS label stack present. Thus, stop processing. | |
1964 | * | |
1965 | * If mpls_depth_delta is positive then an MPLS PUSH action has been | |
1966 | * composed and no further MPLS PUSH action may be performed without | |
1967 | * losing MPLS LSE and ether type information held in xtx->xin->flow. | |
1968 | * Thus, stop processing. | |
1969 | * | |
1970 | * If the MPLS LSE of the flow and base_flow differ then the MPLS LSE | |
1971 | * has been updated. Performing a MPLS PUSH action may be would result in | |
1972 | * losing MPLS LSE and ether type information held in xtx->xin->flow. | |
1973 | * Thus, stop processing. | |
1974 | * | |
1975 | * It is planned that in the future this case will be handled | |
1976 | * by recirculation */ | |
1977 | if (ctx->mpls_depth_delta || | |
1978 | ctx->xin->flow.mpls_lse != ctx->base_flow.mpls_lse) { | |
1979 | return true; | |
1980 | } | |
1981 | ||
33bf9176 | 1982 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
9583bc14 | 1983 | |
b0a17866 SH |
1984 | ctx->pre_push_mpls_lse = ctx->xin->flow.mpls_lse; |
1985 | ||
1986 | if (eth_type_mpls(ctx->xin->flow.dl_type)) { | |
33bf9176 | 1987 | flow->mpls_lse &= ~htonl(MPLS_BOS_MASK); |
9583bc14 EJ |
1988 | } else { |
1989 | ovs_be32 label; | |
1990 | uint8_t tc, ttl; | |
1991 | ||
33bf9176 | 1992 | if (flow->dl_type == htons(ETH_TYPE_IPV6)) { |
9583bc14 EJ |
1993 | label = htonl(0x2); /* IPV6 Explicit Null. */ |
1994 | } else { | |
1995 | label = htonl(0x0); /* IPV4 Explicit Null. */ | |
1996 | } | |
1dd35f8a JP |
1997 | wc->masks.nw_tos |= IP_DSCP_MASK; |
1998 | wc->masks.nw_ttl = 0xff; | |
33bf9176 BP |
1999 | tc = (flow->nw_tos & IP_DSCP_MASK) >> 2; |
2000 | ttl = flow->nw_ttl ? flow->nw_ttl : 0x40; | |
2001 | flow->mpls_lse = set_mpls_lse_values(ttl, tc, 1, label); | |
9583bc14 | 2002 | } |
33bf9176 | 2003 | flow->dl_type = eth_type; |
b0a17866 SH |
2004 | ctx->mpls_depth_delta++; |
2005 | ||
2006 | return false; | |
9583bc14 EJ |
2007 | } |
2008 | ||
b0a17866 | 2009 | static bool |
9cfef3d0 | 2010 | compose_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type) |
9583bc14 | 2011 | { |
33bf9176 | 2012 | struct flow_wildcards *wc = &ctx->xout->wc; |
33bf9176 | 2013 | |
b0a17866 SH |
2014 | if (!eth_type_mpls(ctx->xin->flow.dl_type)) { |
2015 | return true; | |
2016 | } | |
2017 | ||
2018 | /* If mpls_depth_delta is negative then an MPLS POP action has been | |
2019 | * composed. Performing another MPLS POP action | |
2020 | * would result in losing ether type that results from | |
2021 | * the already composed MPLS POP. Thus, stop processing. | |
2022 | * | |
2023 | * It is planned that in the future this case will be handled | |
2024 | * by recirculation */ | |
2025 | if (ctx->mpls_depth_delta < 0) { | |
2026 | return true; | |
2027 | } | |
9583bc14 | 2028 | |
33bf9176 | 2029 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
33bf9176 | 2030 | |
b0a17866 SH |
2031 | /* If mpls_depth_delta is positive then an MPLS PUSH action has been |
2032 | * executed and the previous MPLS LSE saved in ctx->pre_push_mpls_lse. The | |
2033 | * flow's MPLS LSE should be restored to that value to allow any | |
2034 | * subsequent actions that update of the LSE to be executed correctly. | |
2035 | */ | |
2036 | if (ctx->mpls_depth_delta > 0) { | |
2037 | ctx->xin->flow.mpls_lse = ctx->pre_push_mpls_lse; | |
9583bc14 | 2038 | } |
b0a17866 SH |
2039 | |
2040 | ctx->xin->flow.dl_type = eth_type; | |
2041 | ctx->mpls_depth_delta--; | |
2042 | ||
2043 | return false; | |
9583bc14 EJ |
2044 | } |
2045 | ||
2046 | static bool | |
2047 | compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids) | |
2048 | { | |
33bf9176 BP |
2049 | struct flow *flow = &ctx->xin->flow; |
2050 | ||
2051 | if (!is_ip_any(flow)) { | |
9583bc14 EJ |
2052 | return false; |
2053 | } | |
2054 | ||
1dd35f8a | 2055 | ctx->xout->wc.masks.nw_ttl = 0xff; |
33bf9176 BP |
2056 | if (flow->nw_ttl > 1) { |
2057 | flow->nw_ttl--; | |
9583bc14 EJ |
2058 | return false; |
2059 | } else { | |
2060 | size_t i; | |
2061 | ||
2062 | for (i = 0; i < ids->n_controllers; i++) { | |
2063 | execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, | |
2064 | ids->cnt_ids[i]); | |
2065 | } | |
2066 | ||
2067 | /* Stop processing for current table. */ | |
2068 | return true; | |
2069 | } | |
2070 | } | |
2071 | ||
097d4939 JR |
2072 | static bool |
2073 | compose_set_mpls_label_action(struct xlate_ctx *ctx, ovs_be32 label) | |
2074 | { | |
2075 | if (!eth_type_mpls(ctx->xin->flow.dl_type)) { | |
2076 | return true; | |
2077 | } | |
2078 | ||
2079 | /* If mpls_depth_delta is negative then an MPLS POP action has been | |
2080 | * executed and the resulting MPLS label stack is unknown. This means | |
2081 | * a SET MPLS LABEL action can't be executed as it needs to manipulate | |
2082 | * the top-most MPLS LSE. Thus, stop processing. | |
2083 | * | |
2084 | * It is planned that in the future this case will be handled | |
2085 | * by recirculation. | |
2086 | */ | |
2087 | if (ctx->mpls_depth_delta < 0) { | |
2088 | return true; | |
2089 | } | |
2090 | ||
2091 | ctx->xout->wc.masks.mpls_lse |= htonl(MPLS_LABEL_MASK); | |
2092 | set_mpls_lse_label(&ctx->xin->flow.mpls_lse, label); | |
2093 | return false; | |
2094 | } | |
2095 | ||
2096 | static bool | |
2097 | compose_set_mpls_tc_action(struct xlate_ctx *ctx, uint8_t tc) | |
2098 | { | |
2099 | if (!eth_type_mpls(ctx->xin->flow.dl_type)) { | |
2100 | return true; | |
2101 | } | |
2102 | ||
2103 | /* If mpls_depth_delta is negative then an MPLS POP action has been | |
2104 | * executed and the resulting MPLS label stack is unknown. This means | |
2105 | * a SET MPLS TC action can't be executed as it needs to manipulate | |
2106 | * the top-most MPLS LSE. Thus, stop processing. | |
2107 | * | |
2108 | * It is planned that in the future this case will be handled | |
2109 | * by recirculation. | |
2110 | */ | |
2111 | if (ctx->mpls_depth_delta < 0) { | |
2112 | return true; | |
2113 | } | |
2114 | ||
2115 | ctx->xout->wc.masks.mpls_lse |= htonl(MPLS_TC_MASK); | |
2116 | set_mpls_lse_tc(&ctx->xin->flow.mpls_lse, tc); | |
2117 | return false; | |
2118 | } | |
2119 | ||
9583bc14 | 2120 | static bool |
9cfef3d0 | 2121 | compose_set_mpls_ttl_action(struct xlate_ctx *ctx, uint8_t ttl) |
9583bc14 EJ |
2122 | { |
2123 | if (!eth_type_mpls(ctx->xin->flow.dl_type)) { | |
2124 | return true; | |
2125 | } | |
2126 | ||
b0a17866 SH |
2127 | /* If mpls_depth_delta is negative then an MPLS POP action has been |
2128 | * executed and the resulting MPLS label stack is unknown. This means | |
2129 | * a SET MPLS TTL push action can't be executed as it needs to manipulate | |
2130 | * the top-most MPLS LSE. Thus, stop processing. | |
2131 | * | |
2132 | * It is planned that in the future this case will be handled | |
2133 | * by recirculation. | |
2134 | */ | |
2135 | if (ctx->mpls_depth_delta < 0) { | |
2136 | return true; | |
2137 | } | |
2138 | ||
f74e7df7 | 2139 | ctx->xout->wc.masks.mpls_lse |= htonl(MPLS_TTL_MASK); |
9583bc14 EJ |
2140 | set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse, ttl); |
2141 | return false; | |
2142 | } | |
2143 | ||
2144 | static bool | |
9cfef3d0 | 2145 | compose_dec_mpls_ttl_action(struct xlate_ctx *ctx) |
9583bc14 | 2146 | { |
33bf9176 BP |
2147 | struct flow *flow = &ctx->xin->flow; |
2148 | uint8_t ttl = mpls_lse_to_ttl(flow->mpls_lse); | |
1dd35f8a JP |
2149 | struct flow_wildcards *wc = &ctx->xout->wc; |
2150 | ||
1dd35f8a | 2151 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
9583bc14 | 2152 | |
33bf9176 | 2153 | if (!eth_type_mpls(flow->dl_type)) { |
9583bc14 EJ |
2154 | return false; |
2155 | } | |
2156 | ||
2157 | if (ttl > 1) { | |
2158 | ttl--; | |
33bf9176 | 2159 | set_mpls_lse_ttl(&flow->mpls_lse, ttl); |
9583bc14 EJ |
2160 | return false; |
2161 | } else { | |
2162 | execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, 0); | |
2163 | ||
2164 | /* Stop processing for current table. */ | |
2165 | return true; | |
2166 | } | |
2167 | } | |
2168 | ||
2169 | static void | |
2170 | xlate_output_action(struct xlate_ctx *ctx, | |
4e022ec0 | 2171 | ofp_port_t port, uint16_t max_len, bool may_packet_in) |
9583bc14 | 2172 | { |
4e022ec0 | 2173 | ofp_port_t prev_nf_output_iface = ctx->xout->nf_output_iface; |
9583bc14 EJ |
2174 | |
2175 | ctx->xout->nf_output_iface = NF_OUT_DROP; | |
2176 | ||
2177 | switch (port) { | |
2178 | case OFPP_IN_PORT: | |
4e022ec0 | 2179 | compose_output_action(ctx, ctx->xin->flow.in_port.ofp_port); |
9583bc14 EJ |
2180 | break; |
2181 | case OFPP_TABLE: | |
4e022ec0 AW |
2182 | xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port, |
2183 | 0, may_packet_in); | |
9583bc14 EJ |
2184 | break; |
2185 | case OFPP_NORMAL: | |
2186 | xlate_normal(ctx); | |
2187 | break; | |
2188 | case OFPP_FLOOD: | |
2189 | flood_packets(ctx, false); | |
2190 | break; | |
2191 | case OFPP_ALL: | |
2192 | flood_packets(ctx, true); | |
2193 | break; | |
2194 | case OFPP_CONTROLLER: | |
2195 | execute_controller_action(ctx, max_len, OFPR_ACTION, 0); | |
2196 | break; | |
2197 | case OFPP_NONE: | |
2198 | break; | |
2199 | case OFPP_LOCAL: | |
2200 | default: | |
4e022ec0 | 2201 | if (port != ctx->xin->flow.in_port.ofp_port) { |
9583bc14 EJ |
2202 | compose_output_action(ctx, port); |
2203 | } else { | |
2204 | xlate_report(ctx, "skipping output to input port"); | |
2205 | } | |
2206 | break; | |
2207 | } | |
2208 | ||
2209 | if (prev_nf_output_iface == NF_OUT_FLOOD) { | |
2210 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
2211 | } else if (ctx->xout->nf_output_iface == NF_OUT_DROP) { | |
2212 | ctx->xout->nf_output_iface = prev_nf_output_iface; | |
2213 | } else if (prev_nf_output_iface != NF_OUT_DROP && | |
2214 | ctx->xout->nf_output_iface != NF_OUT_FLOOD) { | |
2215 | ctx->xout->nf_output_iface = NF_OUT_MULTI; | |
2216 | } | |
2217 | } | |
2218 | ||
2219 | static void | |
2220 | xlate_output_reg_action(struct xlate_ctx *ctx, | |
2221 | const struct ofpact_output_reg *or) | |
2222 | { | |
2223 | uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow); | |
2224 | if (port <= UINT16_MAX) { | |
2225 | union mf_subvalue value; | |
2226 | ||
2227 | memset(&value, 0xff, sizeof value); | |
2228 | mf_write_subfield_flow(&or->src, &value, &ctx->xout->wc.masks); | |
4e022ec0 AW |
2229 | xlate_output_action(ctx, u16_to_ofp(port), |
2230 | or->max_len, false); | |
9583bc14 EJ |
2231 | } |
2232 | } | |
2233 | ||
2234 | static void | |
2235 | xlate_enqueue_action(struct xlate_ctx *ctx, | |
2236 | const struct ofpact_enqueue *enqueue) | |
2237 | { | |
4e022ec0 | 2238 | ofp_port_t ofp_port = enqueue->port; |
9583bc14 EJ |
2239 | uint32_t queue_id = enqueue->queue; |
2240 | uint32_t flow_priority, priority; | |
2241 | int error; | |
2242 | ||
2243 | /* Translate queue to priority. */ | |
89a8a7f0 | 2244 | error = dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &priority); |
9583bc14 EJ |
2245 | if (error) { |
2246 | /* Fall back to ordinary output action. */ | |
2247 | xlate_output_action(ctx, enqueue->port, 0, false); | |
2248 | return; | |
2249 | } | |
2250 | ||
2251 | /* Check output port. */ | |
2252 | if (ofp_port == OFPP_IN_PORT) { | |
4e022ec0 AW |
2253 | ofp_port = ctx->xin->flow.in_port.ofp_port; |
2254 | } else if (ofp_port == ctx->xin->flow.in_port.ofp_port) { | |
9583bc14 EJ |
2255 | return; |
2256 | } | |
2257 | ||
2258 | /* Add datapath actions. */ | |
2259 | flow_priority = ctx->xin->flow.skb_priority; | |
2260 | ctx->xin->flow.skb_priority = priority; | |
2261 | compose_output_action(ctx, ofp_port); | |
2262 | ctx->xin->flow.skb_priority = flow_priority; | |
2263 | ||
2264 | /* Update NetFlow output port. */ | |
2265 | if (ctx->xout->nf_output_iface == NF_OUT_DROP) { | |
2266 | ctx->xout->nf_output_iface = ofp_port; | |
2267 | } else if (ctx->xout->nf_output_iface != NF_OUT_FLOOD) { | |
2268 | ctx->xout->nf_output_iface = NF_OUT_MULTI; | |
2269 | } | |
2270 | } | |
2271 | ||
2272 | static void | |
2273 | xlate_set_queue_action(struct xlate_ctx *ctx, uint32_t queue_id) | |
2274 | { | |
2275 | uint32_t skb_priority; | |
2276 | ||
89a8a7f0 | 2277 | if (!dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &skb_priority)) { |
9583bc14 EJ |
2278 | ctx->xin->flow.skb_priority = skb_priority; |
2279 | } else { | |
2280 | /* Couldn't translate queue to a priority. Nothing to do. A warning | |
2281 | * has already been logged. */ | |
2282 | } | |
2283 | } | |
2284 | ||
2285 | static bool | |
46c88433 | 2286 | slave_enabled_cb(ofp_port_t ofp_port, void *xbridge_) |
9583bc14 | 2287 | { |
46c88433 EJ |
2288 | const struct xbridge *xbridge = xbridge_; |
2289 | struct xport *port; | |
9583bc14 EJ |
2290 | |
2291 | switch (ofp_port) { | |
2292 | case OFPP_IN_PORT: | |
2293 | case OFPP_TABLE: | |
2294 | case OFPP_NORMAL: | |
2295 | case OFPP_FLOOD: | |
2296 | case OFPP_ALL: | |
2297 | case OFPP_NONE: | |
2298 | return true; | |
2299 | case OFPP_CONTROLLER: /* Not supported by the bundle action. */ | |
2300 | return false; | |
2301 | default: | |
46c88433 | 2302 | port = get_ofp_port(xbridge, ofp_port); |
9583bc14 EJ |
2303 | return port ? port->may_enable : false; |
2304 | } | |
2305 | } | |
2306 | ||
2307 | static void | |
2308 | xlate_bundle_action(struct xlate_ctx *ctx, | |
2309 | const struct ofpact_bundle *bundle) | |
2310 | { | |
4e022ec0 | 2311 | ofp_port_t port; |
9583bc14 EJ |
2312 | |
2313 | port = bundle_execute(bundle, &ctx->xin->flow, &ctx->xout->wc, | |
46c88433 EJ |
2314 | slave_enabled_cb, |
2315 | CONST_CAST(struct xbridge *, ctx->xbridge)); | |
9583bc14 | 2316 | if (bundle->dst.field) { |
f74e7df7 JP |
2317 | nxm_reg_load(&bundle->dst, ofp_to_u16(port), &ctx->xin->flow, |
2318 | &ctx->xout->wc); | |
9583bc14 EJ |
2319 | } else { |
2320 | xlate_output_action(ctx, port, 0, false); | |
2321 | } | |
2322 | } | |
2323 | ||
2324 | static void | |
2325 | xlate_learn_action(struct xlate_ctx *ctx, | |
2326 | const struct ofpact_learn *learn) | |
2327 | { | |
1b63b91e BP |
2328 | uint64_t ofpacts_stub[1024 / 8]; |
2329 | struct ofputil_flow_mod fm; | |
9583bc14 | 2330 | struct ofpbuf ofpacts; |
9583bc14 EJ |
2331 | |
2332 | ctx->xout->has_learn = true; | |
2333 | ||
2334 | learn_mask(learn, &ctx->xout->wc); | |
2335 | ||
2336 | if (!ctx->xin->may_learn) { | |
2337 | return; | |
2338 | } | |
2339 | ||
1b63b91e BP |
2340 | ofpbuf_use_stub(&ofpacts, ofpacts_stub, sizeof ofpacts_stub); |
2341 | learn_execute(learn, &ctx->xin->flow, &fm, &ofpacts); | |
2342 | ofproto_dpif_flow_mod(ctx->xbridge->ofproto, &fm); | |
2343 | ofpbuf_uninit(&ofpacts); | |
9583bc14 EJ |
2344 | } |
2345 | ||
9583bc14 EJ |
2346 | static void |
2347 | xlate_fin_timeout(struct xlate_ctx *ctx, | |
2348 | const struct ofpact_fin_timeout *oft) | |
2349 | { | |
2350 | if (ctx->xin->tcp_flags & (TCP_FIN | TCP_RST) && ctx->rule) { | |
70742c7f EJ |
2351 | rule_dpif_reduce_timeouts(ctx->rule, oft->fin_idle_timeout, |
2352 | oft->fin_hard_timeout); | |
9583bc14 EJ |
2353 | } |
2354 | } | |
2355 | ||
2356 | static void | |
2357 | xlate_sample_action(struct xlate_ctx *ctx, | |
2358 | const struct ofpact_sample *os) | |
2359 | { | |
2360 | union user_action_cookie cookie; | |
2361 | /* Scale the probability from 16-bit to 32-bit while representing | |
2362 | * the same percentage. */ | |
2363 | uint32_t probability = (os->probability << 16) | os->probability; | |
2364 | ||
7fd91025 BP |
2365 | ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow, |
2366 | &ctx->xout->odp_actions, | |
2367 | &ctx->xout->wc, | |
2368 | &ctx->mpls_depth_delta); | |
9583bc14 EJ |
2369 | |
2370 | compose_flow_sample_cookie(os->probability, os->collector_set_id, | |
2371 | os->obs_domain_id, os->obs_point_id, &cookie); | |
46c88433 | 2372 | compose_sample_action(ctx->xbridge, &ctx->xout->odp_actions, &ctx->xin->flow, |
9583bc14 EJ |
2373 | probability, &cookie, sizeof cookie.flow_sample); |
2374 | } | |
2375 | ||
2376 | static bool | |
46c88433 | 2377 | may_receive(const struct xport *xport, struct xlate_ctx *ctx) |
9583bc14 | 2378 | { |
46c88433 EJ |
2379 | if (xport->config & (eth_addr_equals(ctx->xin->flow.dl_dst, eth_addr_stp) |
2380 | ? OFPUTIL_PC_NO_RECV_STP | |
2381 | : OFPUTIL_PC_NO_RECV)) { | |
9583bc14 EJ |
2382 | return false; |
2383 | } | |
2384 | ||
2385 | /* Only drop packets here if both forwarding and learning are | |
2386 | * disabled. If just learning is enabled, we need to have | |
2387 | * OFPP_NORMAL and the learning action have a look at the packet | |
2388 | * before we can drop it. */ | |
9d189a50 | 2389 | if (!xport_stp_forward_state(xport) && !xport_stp_learn_state(xport)) { |
9583bc14 EJ |
2390 | return false; |
2391 | } | |
2392 | ||
2393 | return true; | |
2394 | } | |
2395 | ||
7fdb60a7 SH |
2396 | static void |
2397 | xlate_write_actions(struct xlate_ctx *ctx, const struct ofpact *a) | |
2398 | { | |
2399 | struct ofpact_nest *on = ofpact_get_WRITE_ACTIONS(a); | |
2400 | ofpbuf_put(&ctx->action_set, on->actions, ofpact_nest_get_action_len(on)); | |
2401 | ofpact_pad(&ctx->action_set); | |
2402 | } | |
2403 | ||
2404 | static void | |
2405 | xlate_action_set(struct xlate_ctx *ctx) | |
2406 | { | |
2407 | uint64_t action_list_stub[1024 / 64]; | |
2408 | struct ofpbuf action_list; | |
2409 | ||
2410 | ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub); | |
2411 | ofpacts_execute_action_set(&action_list, &ctx->action_set); | |
2412 | do_xlate_actions(action_list.data, action_list.size, ctx); | |
2413 | ofpbuf_uninit(&action_list); | |
2414 | } | |
2415 | ||
9583bc14 EJ |
2416 | static void |
2417 | do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len, | |
2418 | struct xlate_ctx *ctx) | |
2419 | { | |
33bf9176 BP |
2420 | struct flow_wildcards *wc = &ctx->xout->wc; |
2421 | struct flow *flow = &ctx->xin->flow; | |
9583bc14 EJ |
2422 | const struct ofpact *a; |
2423 | ||
f47ea021 JR |
2424 | /* dl_type already in the mask, not set below. */ |
2425 | ||
9583bc14 EJ |
2426 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { |
2427 | struct ofpact_controller *controller; | |
2428 | const struct ofpact_metadata *metadata; | |
b2dd70be JR |
2429 | const struct ofpact_set_field *set_field; |
2430 | const struct mf_field *mf; | |
9583bc14 EJ |
2431 | |
2432 | if (ctx->exit) { | |
2433 | break; | |
2434 | } | |
2435 | ||
2436 | switch (a->type) { | |
2437 | case OFPACT_OUTPUT: | |
2438 | xlate_output_action(ctx, ofpact_get_OUTPUT(a)->port, | |
2439 | ofpact_get_OUTPUT(a)->max_len, true); | |
2440 | break; | |
2441 | ||
7395c052 | 2442 | case OFPACT_GROUP: |
f4fb341b SH |
2443 | if (xlate_group_action(ctx, ofpact_get_GROUP(a)->group_id)) { |
2444 | return; | |
2445 | } | |
7395c052 NZ |
2446 | break; |
2447 | ||
9583bc14 EJ |
2448 | case OFPACT_CONTROLLER: |
2449 | controller = ofpact_get_CONTROLLER(a); | |
2450 | execute_controller_action(ctx, controller->max_len, | |
2451 | controller->reason, | |
2452 | controller->controller_id); | |
2453 | break; | |
2454 | ||
2455 | case OFPACT_ENQUEUE: | |
2456 | xlate_enqueue_action(ctx, ofpact_get_ENQUEUE(a)); | |
2457 | break; | |
2458 | ||
2459 | case OFPACT_SET_VLAN_VID: | |
f74e7df7 | 2460 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
ca287d20 JR |
2461 | if (flow->vlan_tci & htons(VLAN_CFI) || |
2462 | ofpact_get_SET_VLAN_VID(a)->push_vlan_if_needed) { | |
2463 | flow->vlan_tci &= ~htons(VLAN_VID_MASK); | |
2464 | flow->vlan_tci |= (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid) | |
2465 | | htons(VLAN_CFI)); | |
2466 | } | |
9583bc14 EJ |
2467 | break; |
2468 | ||
2469 | case OFPACT_SET_VLAN_PCP: | |
f74e7df7 | 2470 | wc->masks.vlan_tci |= htons(VLAN_PCP_MASK | VLAN_CFI); |
ca287d20 JR |
2471 | if (flow->vlan_tci & htons(VLAN_CFI) || |
2472 | ofpact_get_SET_VLAN_PCP(a)->push_vlan_if_needed) { | |
2473 | flow->vlan_tci &= ~htons(VLAN_PCP_MASK); | |
2474 | flow->vlan_tci |= htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp | |
2475 | << VLAN_PCP_SHIFT) | VLAN_CFI); | |
2476 | } | |
9583bc14 EJ |
2477 | break; |
2478 | ||
2479 | case OFPACT_STRIP_VLAN: | |
f74e7df7 | 2480 | memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci); |
33bf9176 | 2481 | flow->vlan_tci = htons(0); |
9583bc14 EJ |
2482 | break; |
2483 | ||
2484 | case OFPACT_PUSH_VLAN: | |
2485 | /* XXX 802.1AD(QinQ) */ | |
f74e7df7 | 2486 | memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci); |
33bf9176 | 2487 | flow->vlan_tci = htons(VLAN_CFI); |
9583bc14 EJ |
2488 | break; |
2489 | ||
2490 | case OFPACT_SET_ETH_SRC: | |
f74e7df7 | 2491 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); |
33bf9176 | 2492 | memcpy(flow->dl_src, ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN); |
9583bc14 EJ |
2493 | break; |
2494 | ||
2495 | case OFPACT_SET_ETH_DST: | |
f74e7df7 | 2496 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); |
33bf9176 | 2497 | memcpy(flow->dl_dst, ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN); |
9583bc14 EJ |
2498 | break; |
2499 | ||
2500 | case OFPACT_SET_IPV4_SRC: | |
33bf9176 | 2501 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
f47ea021 | 2502 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); |
33bf9176 | 2503 | flow->nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4; |
9583bc14 EJ |
2504 | } |
2505 | break; | |
2506 | ||
2507 | case OFPACT_SET_IPV4_DST: | |
33bf9176 | 2508 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
f47ea021 | 2509 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); |
33bf9176 | 2510 | flow->nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4; |
9583bc14 EJ |
2511 | } |
2512 | break; | |
2513 | ||
04f01c24 BP |
2514 | case OFPACT_SET_IP_DSCP: |
2515 | if (is_ip_any(flow)) { | |
f47ea021 | 2516 | wc->masks.nw_tos |= IP_DSCP_MASK; |
33bf9176 | 2517 | flow->nw_tos &= ~IP_DSCP_MASK; |
04f01c24 | 2518 | flow->nw_tos |= ofpact_get_SET_IP_DSCP(a)->dscp; |
9583bc14 EJ |
2519 | } |
2520 | break; | |
2521 | ||
ff14eb7a JR |
2522 | case OFPACT_SET_IP_ECN: |
2523 | if (is_ip_any(flow)) { | |
2524 | wc->masks.nw_tos |= IP_ECN_MASK; | |
2525 | flow->nw_tos &= ~IP_ECN_MASK; | |
2526 | flow->nw_tos |= ofpact_get_SET_IP_ECN(a)->ecn; | |
2527 | } | |
2528 | break; | |
2529 | ||
0c20dbe4 JR |
2530 | case OFPACT_SET_IP_TTL: |
2531 | if (is_ip_any(flow)) { | |
2532 | wc->masks.nw_ttl = 0xff; | |
2533 | flow->nw_ttl = ofpact_get_SET_IP_TTL(a)->ttl; | |
2534 | } | |
2535 | break; | |
2536 | ||
9583bc14 | 2537 | case OFPACT_SET_L4_SRC_PORT: |
33bf9176 | 2538 | if (is_ip_any(flow)) { |
f47ea021 JR |
2539 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
2540 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
33bf9176 | 2541 | flow->tp_src = htons(ofpact_get_SET_L4_SRC_PORT(a)->port); |
9583bc14 EJ |
2542 | } |
2543 | break; | |
2544 | ||
2545 | case OFPACT_SET_L4_DST_PORT: | |
33bf9176 | 2546 | if (is_ip_any(flow)) { |
f47ea021 JR |
2547 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
2548 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
33bf9176 | 2549 | flow->tp_dst = htons(ofpact_get_SET_L4_DST_PORT(a)->port); |
9583bc14 EJ |
2550 | } |
2551 | break; | |
2552 | ||
2553 | case OFPACT_RESUBMIT: | |
2554 | xlate_ofpact_resubmit(ctx, ofpact_get_RESUBMIT(a)); | |
2555 | break; | |
2556 | ||
2557 | case OFPACT_SET_TUNNEL: | |
33bf9176 | 2558 | flow->tunnel.tun_id = htonll(ofpact_get_SET_TUNNEL(a)->tun_id); |
9583bc14 EJ |
2559 | break; |
2560 | ||
2561 | case OFPACT_SET_QUEUE: | |
2562 | xlate_set_queue_action(ctx, ofpact_get_SET_QUEUE(a)->queue_id); | |
2563 | break; | |
2564 | ||
2565 | case OFPACT_POP_QUEUE: | |
33bf9176 | 2566 | flow->skb_priority = ctx->orig_skb_priority; |
9583bc14 EJ |
2567 | break; |
2568 | ||
2569 | case OFPACT_REG_MOVE: | |
33bf9176 | 2570 | nxm_execute_reg_move(ofpact_get_REG_MOVE(a), flow, wc); |
9583bc14 EJ |
2571 | break; |
2572 | ||
2573 | case OFPACT_REG_LOAD: | |
f47ea021 | 2574 | nxm_execute_reg_load(ofpact_get_REG_LOAD(a), flow, wc); |
9583bc14 EJ |
2575 | break; |
2576 | ||
b2dd70be JR |
2577 | case OFPACT_SET_FIELD: |
2578 | set_field = ofpact_get_SET_FIELD(a); | |
2579 | mf = set_field->field; | |
2580 | mf_mask_field_and_prereqs(mf, &wc->masks); | |
2581 | ||
2582 | /* Set field action only ever overwrites packet's outermost | |
2583 | * applicable header fields. Do nothing if no header exists. */ | |
2584 | if ((mf->id != MFF_VLAN_VID || flow->vlan_tci & htons(VLAN_CFI)) | |
2585 | && ((mf->id != MFF_MPLS_LABEL && mf->id != MFF_MPLS_TC) | |
2586 | || flow->mpls_lse)) { | |
2587 | mf_set_flow_value(mf, &set_field->value, flow); | |
2588 | } | |
2589 | break; | |
2590 | ||
9583bc14 | 2591 | case OFPACT_STACK_PUSH: |
33bf9176 BP |
2592 | nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), flow, wc, |
2593 | &ctx->stack); | |
9583bc14 EJ |
2594 | break; |
2595 | ||
2596 | case OFPACT_STACK_POP: | |
f74e7df7 JP |
2597 | nxm_execute_stack_pop(ofpact_get_STACK_POP(a), flow, wc, |
2598 | &ctx->stack); | |
9583bc14 EJ |
2599 | break; |
2600 | ||
2601 | case OFPACT_PUSH_MPLS: | |
b0a17866 SH |
2602 | if (compose_mpls_push_action(ctx, |
2603 | ofpact_get_PUSH_MPLS(a)->ethertype)) { | |
2604 | return; | |
2605 | } | |
9583bc14 EJ |
2606 | break; |
2607 | ||
2608 | case OFPACT_POP_MPLS: | |
b0a17866 SH |
2609 | if (compose_mpls_pop_action(ctx, |
2610 | ofpact_get_POP_MPLS(a)->ethertype)) { | |
2611 | return; | |
2612 | } | |
9583bc14 EJ |
2613 | break; |
2614 | ||
097d4939 JR |
2615 | case OFPACT_SET_MPLS_LABEL: |
2616 | if (compose_set_mpls_label_action(ctx, | |
2617 | ofpact_get_SET_MPLS_LABEL(a)->label)) { | |
2618 | return; | |
2619 | } | |
2620 | break; | |
2621 | ||
2622 | case OFPACT_SET_MPLS_TC: | |
2623 | if (compose_set_mpls_tc_action(ctx, | |
2624 | ofpact_get_SET_MPLS_TC(a)->tc)) { | |
2625 | return; | |
2626 | } | |
2627 | break; | |
2628 | ||
9583bc14 | 2629 | case OFPACT_SET_MPLS_TTL: |
9cfef3d0 | 2630 | if (compose_set_mpls_ttl_action(ctx, |
9583bc14 | 2631 | ofpact_get_SET_MPLS_TTL(a)->ttl)) { |
ad3efdcb | 2632 | return; |
9583bc14 EJ |
2633 | } |
2634 | break; | |
2635 | ||
2636 | case OFPACT_DEC_MPLS_TTL: | |
9cfef3d0 | 2637 | if (compose_dec_mpls_ttl_action(ctx)) { |
ad3efdcb | 2638 | return; |
9583bc14 EJ |
2639 | } |
2640 | break; | |
2641 | ||
2642 | case OFPACT_DEC_TTL: | |
f74e7df7 | 2643 | wc->masks.nw_ttl = 0xff; |
9583bc14 | 2644 | if (compose_dec_ttl(ctx, ofpact_get_DEC_TTL(a))) { |
ad3efdcb | 2645 | return; |
9583bc14 EJ |
2646 | } |
2647 | break; | |
2648 | ||
2649 | case OFPACT_NOTE: | |
2650 | /* Nothing to do. */ | |
2651 | break; | |
2652 | ||
2653 | case OFPACT_MULTIPATH: | |
33bf9176 | 2654 | multipath_execute(ofpact_get_MULTIPATH(a), flow, wc); |
9583bc14 EJ |
2655 | break; |
2656 | ||
2657 | case OFPACT_BUNDLE: | |
9583bc14 EJ |
2658 | xlate_bundle_action(ctx, ofpact_get_BUNDLE(a)); |
2659 | break; | |
2660 | ||
2661 | case OFPACT_OUTPUT_REG: | |
2662 | xlate_output_reg_action(ctx, ofpact_get_OUTPUT_REG(a)); | |
2663 | break; | |
2664 | ||
2665 | case OFPACT_LEARN: | |
2666 | xlate_learn_action(ctx, ofpact_get_LEARN(a)); | |
2667 | break; | |
2668 | ||
2669 | case OFPACT_EXIT: | |
2670 | ctx->exit = true; | |
2671 | break; | |
2672 | ||
2673 | case OFPACT_FIN_TIMEOUT: | |
33bf9176 | 2674 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
9583bc14 EJ |
2675 | ctx->xout->has_fin_timeout = true; |
2676 | xlate_fin_timeout(ctx, ofpact_get_FIN_TIMEOUT(a)); | |
2677 | break; | |
2678 | ||
2679 | case OFPACT_CLEAR_ACTIONS: | |
7fdb60a7 SH |
2680 | ofpbuf_clear(&ctx->action_set); |
2681 | break; | |
2682 | ||
2683 | case OFPACT_WRITE_ACTIONS: | |
2684 | xlate_write_actions(ctx, a); | |
9583bc14 EJ |
2685 | break; |
2686 | ||
2687 | case OFPACT_WRITE_METADATA: | |
2688 | metadata = ofpact_get_WRITE_METADATA(a); | |
33bf9176 BP |
2689 | flow->metadata &= ~metadata->mask; |
2690 | flow->metadata |= metadata->metadata & metadata->mask; | |
9583bc14 EJ |
2691 | break; |
2692 | ||
638a19b0 JR |
2693 | case OFPACT_METER: |
2694 | /* Not implemented yet. */ | |
2695 | break; | |
2696 | ||
9583bc14 | 2697 | case OFPACT_GOTO_TABLE: { |
9583bc14 | 2698 | struct ofpact_goto_table *ogt = ofpact_get_GOTO_TABLE(a); |
9583bc14 EJ |
2699 | |
2700 | ovs_assert(ctx->table_id < ogt->table_id); | |
4468099e EJ |
2701 | xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port, |
2702 | ogt->table_id, true); | |
9583bc14 EJ |
2703 | break; |
2704 | } | |
2705 | ||
2706 | case OFPACT_SAMPLE: | |
2707 | xlate_sample_action(ctx, ofpact_get_SAMPLE(a)); | |
2708 | break; | |
2709 | } | |
2710 | } | |
9583bc14 EJ |
2711 | } |
2712 | ||
2713 | void | |
2714 | xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto, | |
2715 | const struct flow *flow, struct rule_dpif *rule, | |
a66733a8 | 2716 | uint16_t tcp_flags, const struct ofpbuf *packet) |
9583bc14 EJ |
2717 | { |
2718 | xin->ofproto = ofproto; | |
2719 | xin->flow = *flow; | |
2720 | xin->packet = packet; | |
2721 | xin->may_learn = packet != NULL; | |
2722 | xin->rule = rule; | |
2723 | xin->ofpacts = NULL; | |
2724 | xin->ofpacts_len = 0; | |
2725 | xin->tcp_flags = tcp_flags; | |
2726 | xin->resubmit_hook = NULL; | |
2727 | xin->report_hook = NULL; | |
2728 | xin->resubmit_stats = NULL; | |
2729 | } | |
2730 | ||
2731 | void | |
2732 | xlate_out_uninit(struct xlate_out *xout) | |
2733 | { | |
2734 | if (xout) { | |
2735 | ofpbuf_uninit(&xout->odp_actions); | |
2736 | } | |
2737 | } | |
2738 | ||
2739 | /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts' | |
2740 | * into datapath actions, using 'ctx', and discards the datapath actions. */ | |
2741 | void | |
2742 | xlate_actions_for_side_effects(struct xlate_in *xin) | |
2743 | { | |
2744 | struct xlate_out xout; | |
2745 | ||
2746 | xlate_actions(xin, &xout); | |
2747 | xlate_out_uninit(&xout); | |
2748 | } | |
2749 | ||
2750 | static void | |
2751 | xlate_report(struct xlate_ctx *ctx, const char *s) | |
2752 | { | |
2753 | if (ctx->xin->report_hook) { | |
4d0acc70 | 2754 | ctx->xin->report_hook(ctx->xin, s, ctx->recurse); |
9583bc14 EJ |
2755 | } |
2756 | } | |
2757 | ||
2758 | void | |
2759 | xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src) | |
2760 | { | |
2761 | dst->wc = src->wc; | |
9583bc14 EJ |
2762 | dst->slow = src->slow; |
2763 | dst->has_learn = src->has_learn; | |
2764 | dst->has_normal = src->has_normal; | |
2765 | dst->has_fin_timeout = src->has_fin_timeout; | |
2766 | dst->nf_output_iface = src->nf_output_iface; | |
2767 | dst->mirrors = src->mirrors; | |
2768 | ||
2769 | ofpbuf_use_stub(&dst->odp_actions, dst->odp_actions_stub, | |
2770 | sizeof dst->odp_actions_stub); | |
2771 | ofpbuf_put(&dst->odp_actions, src->odp_actions.data, | |
2772 | src->odp_actions.size); | |
2773 | } | |
10e57640 EJ |
2774 | |
2775 | /* Returns a reference to the sflow handled associated with ofproto, or NULL if | |
2776 | * there is none. The caller is responsible for decrementing the results ref | |
2777 | * count with dpif_sflow_unref(). */ | |
2778 | struct dpif_sflow * | |
2779 | xlate_get_sflow(const struct ofproto_dpif *ofproto) | |
2780 | { | |
2781 | struct dpif_sflow *sflow = NULL; | |
2782 | struct xbridge *xbridge; | |
2783 | ||
2784 | ovs_rwlock_rdlock(&xlate_rwlock); | |
2785 | xbridge = xbridge_lookup(ofproto); | |
2786 | if (xbridge) { | |
2787 | sflow = dpif_sflow_ref(xbridge->sflow); | |
2788 | } | |
2789 | ovs_rwlock_unlock(&xlate_rwlock); | |
2790 | ||
2791 | return sflow; | |
2792 | } | |
2793 | ||
2794 | /* Returns a reference to the ipfix handled associated with ofproto, or NULL if | |
2795 | * there is none. The caller is responsible for decrementing the results ref | |
2796 | * count with dpif_ipfix_unref(). */ | |
2797 | struct dpif_ipfix * | |
2798 | xlate_get_ipfix(const struct ofproto_dpif *ofproto) | |
2799 | { | |
2800 | struct dpif_ipfix *ipfix = NULL; | |
2801 | struct xbridge *xbridge; | |
2802 | ||
2803 | ovs_rwlock_rdlock(&xlate_rwlock); | |
2804 | xbridge = xbridge_lookup(ofproto); | |
2805 | if (xbridge) { | |
2806 | ipfix = dpif_ipfix_ref(xbridge->ipfix); | |
2807 | } | |
2808 | ovs_rwlock_unlock(&xlate_rwlock); | |
2809 | ||
2810 | return ipfix; | |
2811 | } | |
9583bc14 | 2812 | \f |
55954f6e EJ |
2813 | static struct skb_priority_to_dscp * |
2814 | get_skb_priority(const struct xport *xport, uint32_t skb_priority) | |
2815 | { | |
2816 | struct skb_priority_to_dscp *pdscp; | |
2817 | uint32_t hash; | |
2818 | ||
2819 | hash = hash_int(skb_priority, 0); | |
2820 | HMAP_FOR_EACH_IN_BUCKET (pdscp, hmap_node, hash, &xport->skb_priorities) { | |
2821 | if (pdscp->skb_priority == skb_priority) { | |
2822 | return pdscp; | |
2823 | } | |
2824 | } | |
2825 | return NULL; | |
2826 | } | |
2827 | ||
2828 | static bool | |
2829 | dscp_from_skb_priority(const struct xport *xport, uint32_t skb_priority, | |
2830 | uint8_t *dscp) | |
2831 | { | |
2832 | struct skb_priority_to_dscp *pdscp = get_skb_priority(xport, skb_priority); | |
2833 | *dscp = pdscp ? pdscp->dscp : 0; | |
2834 | return pdscp != NULL; | |
2835 | } | |
2836 | ||
2837 | static void | |
2838 | clear_skb_priorities(struct xport *xport) | |
2839 | { | |
2840 | struct skb_priority_to_dscp *pdscp, *next; | |
2841 | ||
2842 | HMAP_FOR_EACH_SAFE (pdscp, next, hmap_node, &xport->skb_priorities) { | |
2843 | hmap_remove(&xport->skb_priorities, &pdscp->hmap_node); | |
2844 | free(pdscp); | |
2845 | } | |
2846 | } | |
2847 | ||
ce4a6b76 BP |
2848 | static bool |
2849 | actions_output_to_local_port(const struct xlate_ctx *ctx) | |
2850 | { | |
46c88433 | 2851 | odp_port_t local_odp_port = ofp_port_to_odp_port(ctx->xbridge, OFPP_LOCAL); |
ce4a6b76 BP |
2852 | const struct nlattr *a; |
2853 | unsigned int left; | |
2854 | ||
2855 | NL_ATTR_FOR_EACH_UNSAFE (a, left, ctx->xout->odp_actions.data, | |
2856 | ctx->xout->odp_actions.size) { | |
2857 | if (nl_attr_type(a) == OVS_ACTION_ATTR_OUTPUT | |
2858 | && nl_attr_get_odp_port(a) == local_odp_port) { | |
2859 | return true; | |
2860 | } | |
2861 | } | |
2862 | return false; | |
2863 | } | |
9583bc14 | 2864 | |
91d6cd12 AW |
2865 | /* Thread safe call to xlate_actions__(). */ |
2866 | void | |
2867 | xlate_actions(struct xlate_in *xin, struct xlate_out *xout) | |
2868 | { | |
2869 | ovs_rwlock_rdlock(&xlate_rwlock); | |
2870 | xlate_actions__(xin, xout); | |
2871 | ovs_rwlock_unlock(&xlate_rwlock); | |
2872 | } | |
2873 | ||
9583bc14 | 2874 | /* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts' |
56450a41 BP |
2875 | * into datapath actions in 'odp_actions', using 'ctx'. |
2876 | * | |
2877 | * The caller must take responsibility for eventually freeing 'xout', with | |
2878 | * xlate_out_uninit(). */ | |
91d6cd12 AW |
2879 | static void |
2880 | xlate_actions__(struct xlate_in *xin, struct xlate_out *xout) | |
2881 | OVS_REQ_RDLOCK(xlate_rwlock) | |
9583bc14 | 2882 | { |
33bf9176 BP |
2883 | struct flow_wildcards *wc = &xout->wc; |
2884 | struct flow *flow = &xin->flow; | |
10c44245 | 2885 | struct rule_dpif *rule = NULL; |
33bf9176 | 2886 | |
6f00e29b | 2887 | struct rule_actions *actions = NULL; |
9583bc14 EJ |
2888 | enum slow_path_reason special; |
2889 | const struct ofpact *ofpacts; | |
46c88433 | 2890 | struct xport *in_port; |
9583bc14 EJ |
2891 | struct flow orig_flow; |
2892 | struct xlate_ctx ctx; | |
2893 | size_t ofpacts_len; | |
62a7cc71 | 2894 | bool tnl_may_send; |
9583bc14 | 2895 | |
46c88433 | 2896 | COVERAGE_INC(xlate_actions); |
9583bc14 EJ |
2897 | |
2898 | /* Flow initialization rules: | |
2899 | * - 'base_flow' must match the kernel's view of the packet at the | |
2900 | * time that action processing starts. 'flow' represents any | |
2901 | * transformations we wish to make through actions. | |
2902 | * - By default 'base_flow' and 'flow' are the same since the input | |
2903 | * packet matches the output before any actions are applied. | |
2904 | * - When using VLAN splinters, 'base_flow''s VLAN is set to the value | |
2905 | * of the received packet as seen by the kernel. If we later output | |
2906 | * to another device without any modifications this will cause us to | |
2907 | * insert a new tag since the original one was stripped off by the | |
2908 | * VLAN device. | |
2909 | * - Tunnel metadata as received is retained in 'flow'. This allows | |
2910 | * tunnel metadata matching also in later tables. | |
2911 | * Since a kernel action for setting the tunnel metadata will only be | |
2912 | * generated with actual tunnel output, changing the tunnel metadata | |
2913 | * values in 'flow' (such as tun_id) will only have effect with a later | |
2914 | * tunnel output action. | |
2915 | * - Tunnel 'base_flow' is completely cleared since that is what the | |
2916 | * kernel does. If we wish to maintain the original values an action | |
2917 | * needs to be generated. */ | |
2918 | ||
2919 | ctx.xin = xin; | |
2920 | ctx.xout = xout; | |
46c88433 EJ |
2921 | ctx.xout->slow = 0; |
2922 | ctx.xout->has_learn = false; | |
2923 | ctx.xout->has_normal = false; | |
2924 | ctx.xout->has_fin_timeout = false; | |
2925 | ctx.xout->nf_output_iface = NF_OUT_DROP; | |
2926 | ctx.xout->mirrors = 0; | |
2927 | ofpbuf_use_stub(&ctx.xout->odp_actions, ctx.xout->odp_actions_stub, | |
2928 | sizeof ctx.xout->odp_actions_stub); | |
2929 | ofpbuf_reserve(&ctx.xout->odp_actions, NL_A_U32_SIZE); | |
2930 | ||
2931 | ctx.xbridge = xbridge_lookup(xin->ofproto); | |
2932 | if (!ctx.xbridge) { | |
dc24a00f | 2933 | goto out; |
46c88433 | 2934 | } |
9583bc14 | 2935 | |
9583bc14 EJ |
2936 | ctx.rule = xin->rule; |
2937 | ||
33bf9176 | 2938 | ctx.base_flow = *flow; |
9583bc14 | 2939 | memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel); |
33bf9176 | 2940 | ctx.orig_tunnel_ip_dst = flow->tunnel.ip_dst; |
9583bc14 | 2941 | |
33bf9176 BP |
2942 | flow_wildcards_init_catchall(wc); |
2943 | memset(&wc->masks.in_port, 0xff, sizeof wc->masks.in_port); | |
1dd35f8a | 2944 | memset(&wc->masks.skb_priority, 0xff, sizeof wc->masks.skb_priority); |
7431e171 | 2945 | memset(&wc->masks.dl_type, 0xff, sizeof wc->masks.dl_type); |
1dd35f8a | 2946 | wc->masks.nw_frag |= FLOW_NW_FRAG_MASK; |
9583bc14 | 2947 | |
62a7cc71 | 2948 | tnl_may_send = tnl_xlate_init(&ctx.base_flow, flow, wc); |
46c88433 | 2949 | if (ctx.xbridge->has_netflow) { |
9b658910 | 2950 | netflow_mask_wc(flow, wc); |
9583bc14 EJ |
2951 | } |
2952 | ||
9583bc14 | 2953 | ctx.recurse = 0; |
98b07853 | 2954 | ctx.resubmits = 0; |
33bf9176 | 2955 | ctx.orig_skb_priority = flow->skb_priority; |
9583bc14 EJ |
2956 | ctx.table_id = 0; |
2957 | ctx.exit = false; | |
b0a17866 | 2958 | ctx.mpls_depth_delta = 0; |
9583bc14 | 2959 | |
10c44245 EJ |
2960 | if (!xin->ofpacts && !ctx.rule) { |
2961 | rule_dpif_lookup(ctx.xbridge->ofproto, flow, wc, &rule); | |
2962 | if (ctx.xin->resubmit_stats) { | |
2963 | rule_dpif_credit_stats(rule, ctx.xin->resubmit_stats); | |
2964 | } | |
2965 | ctx.rule = rule; | |
2966 | } | |
ee1afdd5 | 2967 | xout->fail_open = ctx.rule && rule_dpif_is_fail_open(ctx.rule); |
10c44245 | 2968 | |
9583bc14 EJ |
2969 | if (xin->ofpacts) { |
2970 | ofpacts = xin->ofpacts; | |
2971 | ofpacts_len = xin->ofpacts_len; | |
10c44245 EJ |
2972 | } else if (ctx.rule) { |
2973 | actions = rule_dpif_get_actions(ctx.rule); | |
6f00e29b BP |
2974 | ofpacts = actions->ofpacts; |
2975 | ofpacts_len = actions->ofpacts_len; | |
9583bc14 EJ |
2976 | } else { |
2977 | NOT_REACHED(); | |
2978 | } | |
2979 | ||
2980 | ofpbuf_use_stub(&ctx.stack, ctx.init_stack, sizeof ctx.init_stack); | |
7fdb60a7 SH |
2981 | ofpbuf_use_stub(&ctx.action_set, |
2982 | ctx.action_set_stub, sizeof ctx.action_set_stub); | |
9583bc14 | 2983 | |
ade6ad9c | 2984 | if (mbridge_has_mirrors(ctx.xbridge->mbridge)) { |
9583bc14 EJ |
2985 | /* Do this conditionally because the copy is expensive enough that it |
2986 | * shows up in profiles. */ | |
33bf9176 | 2987 | orig_flow = *flow; |
9583bc14 EJ |
2988 | } |
2989 | ||
33bf9176 | 2990 | if (flow->nw_frag & FLOW_NW_FRAG_ANY) { |
46c88433 | 2991 | switch (ctx.xbridge->frag) { |
9583bc14 EJ |
2992 | case OFPC_FRAG_NORMAL: |
2993 | /* We must pretend that transport ports are unavailable. */ | |
33bf9176 BP |
2994 | flow->tp_src = ctx.base_flow.tp_src = htons(0); |
2995 | flow->tp_dst = ctx.base_flow.tp_dst = htons(0); | |
9583bc14 EJ |
2996 | break; |
2997 | ||
2998 | case OFPC_FRAG_DROP: | |
dc24a00f | 2999 | goto out; |
9583bc14 EJ |
3000 | |
3001 | case OFPC_FRAG_REASM: | |
3002 | NOT_REACHED(); | |
3003 | ||
3004 | case OFPC_FRAG_NX_MATCH: | |
3005 | /* Nothing to do. */ | |
3006 | break; | |
3007 | ||
3008 | case OFPC_INVALID_TTL_TO_CONTROLLER: | |
3009 | NOT_REACHED(); | |
3010 | } | |
3011 | } | |
3012 | ||
46c88433 | 3013 | in_port = get_ofp_port(ctx.xbridge, flow->in_port.ofp_port); |
642dc74d | 3014 | special = process_special(&ctx, flow, in_port, ctx.xin->packet); |
9583bc14 | 3015 | if (special) { |
04594cd5 | 3016 | ctx.xout->slow |= special; |
9583bc14 | 3017 | } else { |
9583bc14 | 3018 | size_t sample_actions_len; |
9583bc14 | 3019 | |
4e022ec0 | 3020 | if (flow->in_port.ofp_port |
46c88433 EJ |
3021 | != vsp_realdev_to_vlandev(ctx.xbridge->ofproto, |
3022 | flow->in_port.ofp_port, | |
33bf9176 | 3023 | flow->vlan_tci)) { |
9583bc14 EJ |
3024 | ctx.base_flow.vlan_tci = 0; |
3025 | } | |
3026 | ||
3027 | add_sflow_action(&ctx); | |
3028 | add_ipfix_action(&ctx); | |
3029 | sample_actions_len = ctx.xout->odp_actions.size; | |
3030 | ||
62a7cc71 | 3031 | if (tnl_may_send && (!in_port || may_receive(in_port, &ctx))) { |
9583bc14 EJ |
3032 | do_xlate_actions(ofpacts, ofpacts_len, &ctx); |
3033 | ||
3034 | /* We've let OFPP_NORMAL and the learning action look at the | |
3035 | * packet, so drop it now if forwarding is disabled. */ | |
9d189a50 | 3036 | if (in_port && !xport_stp_forward_state(in_port)) { |
9583bc14 EJ |
3037 | ctx.xout->odp_actions.size = sample_actions_len; |
3038 | } | |
3039 | } | |
3040 | ||
7fdb60a7 SH |
3041 | if (ctx.action_set.size) { |
3042 | xlate_action_set(&ctx); | |
3043 | } | |
3044 | ||
46c88433 | 3045 | if (ctx.xbridge->has_in_band |
ce4a6b76 BP |
3046 | && in_band_must_output_to_local_port(flow) |
3047 | && !actions_output_to_local_port(&ctx)) { | |
9583bc14 EJ |
3048 | compose_output_action(&ctx, OFPP_LOCAL); |
3049 | } | |
aaa0fbae EJ |
3050 | |
3051 | fix_sflow_action(&ctx); | |
3052 | ||
46c88433 | 3053 | if (mbridge_has_mirrors(ctx.xbridge->mbridge)) { |
9583bc14 EJ |
3054 | add_mirror_actions(&ctx, &orig_flow); |
3055 | } | |
9583bc14 EJ |
3056 | } |
3057 | ||
542024c4 BP |
3058 | if (nl_attr_oversized(ctx.xout->odp_actions.size)) { |
3059 | /* These datapath actions are too big for a Netlink attribute, so we | |
0f032e95 BP |
3060 | * can't hand them to the kernel directly. dpif_execute() can execute |
3061 | * them one by one with help, so just mark the result as SLOW_ACTION to | |
3062 | * prevent the flow from being installed. */ | |
3063 | COVERAGE_INC(xlate_actions_oversize); | |
3064 | ctx.xout->slow |= SLOW_ACTION; | |
542024c4 BP |
3065 | } |
3066 | ||
9583bc14 | 3067 | ofpbuf_uninit(&ctx.stack); |
7fdb60a7 | 3068 | ofpbuf_uninit(&ctx.action_set); |
9583bc14 EJ |
3069 | |
3070 | /* Clear the metadata and register wildcard masks, because we won't | |
3071 | * use non-header fields as part of the cache. */ | |
33bf9176 BP |
3072 | memset(&wc->masks.metadata, 0, sizeof wc->masks.metadata); |
3073 | memset(&wc->masks.regs, 0, sizeof wc->masks.regs); | |
dc24a00f EJ |
3074 | |
3075 | out: | |
91d6cd12 | 3076 | rule_actions_unref(actions); |
10c44245 | 3077 | rule_dpif_unref(rule); |
91d6cd12 AW |
3078 | } |
3079 | ||
3080 | /* Sends 'packet' out 'ofport'. | |
3081 | * May modify 'packet'. | |
3082 | * Returns 0 if successful, otherwise a positive errno value. */ | |
3083 | int | |
3084 | xlate_send_packet(const struct ofport_dpif *ofport, struct ofpbuf *packet) | |
3085 | { | |
91d6cd12 | 3086 | struct xport *xport; |
91d6cd12 | 3087 | struct ofpact_output output; |
91d6cd12 AW |
3088 | struct flow flow; |
3089 | union flow_in_port in_port_; | |
3090 | int error; | |
3091 | ||
91d6cd12 AW |
3092 | ofpact_init(&output.ofpact, OFPACT_OUTPUT, sizeof output); |
3093 | /* Use OFPP_NONE as the in_port to avoid special packet processing. */ | |
3094 | in_port_.ofp_port = OFPP_NONE; | |
3095 | flow_extract(packet, 0, 0, NULL, &in_port_, &flow); | |
3096 | ||
3097 | ovs_rwlock_rdlock(&xlate_rwlock); | |
3098 | xport = xport_lookup(ofport); | |
3099 | if (!xport) { | |
91d6cd12 | 3100 | ovs_rwlock_unlock(&xlate_rwlock); |
02ea2703 | 3101 | return EINVAL; |
91d6cd12 | 3102 | } |
91d6cd12 AW |
3103 | output.port = xport->ofp_port; |
3104 | output.max_len = 0; | |
690efec2 AW |
3105 | error = ofproto_dpif_execute_actions(xport->xbridge->ofproto, &flow, NULL, |
3106 | &output.ofpact, sizeof output, | |
3107 | packet); | |
dc24a00f | 3108 | ovs_rwlock_unlock(&xlate_rwlock); |
91d6cd12 | 3109 | return error; |
9583bc14 | 3110 | } |