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0934ebba | 1 | /* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc. |
9583bc14 EJ |
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" |
60d02c72 | 45 | #include "ofproto/ofproto-dpif-monitor.h" |
9583bc14 EJ |
46 | #include "ofproto/ofproto-dpif-sflow.h" |
47 | #include "ofproto/ofproto-dpif.h" | |
6f00e29b | 48 | #include "ofproto/ofproto-provider.h" |
9583bc14 EJ |
49 | #include "tunnel.h" |
50 | #include "vlog.h" | |
51 | ||
46c88433 | 52 | COVERAGE_DEFINE(xlate_actions); |
0f032e95 | 53 | COVERAGE_DEFINE(xlate_actions_oversize); |
8bfd0fda | 54 | COVERAGE_DEFINE(xlate_actions_mpls_overflow); |
9583bc14 EJ |
55 | |
56 | VLOG_DEFINE_THIS_MODULE(ofproto_dpif_xlate); | |
57 | ||
8a553e9a EJ |
58 | /* Maximum depth of flow table recursion (due to resubmit actions) in a |
59 | * flow translation. */ | |
60 | #define MAX_RESUBMIT_RECURSION 64 | |
adcf00ba AZ |
61 | #define MAX_INTERNAL_RESUBMITS 1 /* Max resbmits allowed using rules in |
62 | internal table. */ | |
8a553e9a | 63 | |
98b07853 BP |
64 | /* Maximum number of resubmit actions in a flow translation, whether they are |
65 | * recursive or not. */ | |
66 | #define MAX_RESUBMITS (MAX_RESUBMIT_RECURSION * MAX_RESUBMIT_RECURSION) | |
67 | ||
dc24a00f EJ |
68 | struct ovs_rwlock xlate_rwlock = OVS_RWLOCK_INITIALIZER; |
69 | ||
46c88433 EJ |
70 | struct xbridge { |
71 | struct hmap_node hmap_node; /* Node in global 'xbridges' map. */ | |
72 | struct ofproto_dpif *ofproto; /* Key in global 'xbridges' map. */ | |
73 | ||
74 | struct list xbundles; /* Owned xbundles. */ | |
75 | struct hmap xports; /* Indexed by ofp_port. */ | |
76 | ||
77 | char *name; /* Name used in log messages. */ | |
89a8a7f0 | 78 | struct dpif *dpif; /* Datapath interface. */ |
46c88433 EJ |
79 | struct mac_learning *ml; /* Mac learning handle. */ |
80 | struct mbridge *mbridge; /* Mirroring. */ | |
81 | struct dpif_sflow *sflow; /* SFlow handle, or null. */ | |
82 | struct dpif_ipfix *ipfix; /* Ipfix handle, or null. */ | |
ce3955be | 83 | struct netflow *netflow; /* Netflow handle, or null. */ |
9d189a50 | 84 | struct stp *stp; /* STP or null if disabled. */ |
46c88433 | 85 | |
ec89fc6f EJ |
86 | /* Special rules installed by ofproto-dpif. */ |
87 | struct rule_dpif *miss_rule; | |
88 | struct rule_dpif *no_packet_in_rule; | |
89 | ||
46c88433 | 90 | enum ofp_config_flags frag; /* Fragmentation handling. */ |
46c88433 EJ |
91 | bool has_in_band; /* Bridge has in band control? */ |
92 | bool forward_bpdu; /* Bridge forwards STP BPDUs? */ | |
4b97b70d | 93 | |
adcf00ba AZ |
94 | /* True if the datapath supports recirculation. */ |
95 | bool enable_recirc; | |
96 | ||
4b97b70d BP |
97 | /* True if the datapath supports variable-length |
98 | * OVS_USERSPACE_ATTR_USERDATA in OVS_ACTION_ATTR_USERSPACE actions. | |
99 | * False if the datapath supports only 8-byte (or shorter) userdata. */ | |
100 | bool variable_length_userdata; | |
8bfd0fda BP |
101 | |
102 | /* Number of MPLS label stack entries that the datapath supports | |
103 | * in matches. */ | |
104 | size_t max_mpls_depth; | |
46c88433 EJ |
105 | }; |
106 | ||
107 | struct xbundle { | |
108 | struct hmap_node hmap_node; /* In global 'xbundles' map. */ | |
109 | struct ofbundle *ofbundle; /* Key in global 'xbundles' map. */ | |
110 | ||
111 | struct list list_node; /* In parent 'xbridges' list. */ | |
112 | struct xbridge *xbridge; /* Parent xbridge. */ | |
113 | ||
114 | struct list xports; /* Contains "struct xport"s. */ | |
115 | ||
116 | char *name; /* Name used in log messages. */ | |
117 | struct bond *bond; /* Nonnull iff more than one port. */ | |
118 | struct lacp *lacp; /* LACP handle or null. */ | |
119 | ||
120 | enum port_vlan_mode vlan_mode; /* VLAN mode. */ | |
121 | int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */ | |
122 | unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1. | |
123 | * NULL if all VLANs are trunked. */ | |
124 | bool use_priority_tags; /* Use 802.1p tag for frames in VLAN 0? */ | |
125 | bool floodable; /* No port has OFPUTIL_PC_NO_FLOOD set? */ | |
126 | }; | |
127 | ||
128 | struct xport { | |
129 | struct hmap_node hmap_node; /* Node in global 'xports' map. */ | |
130 | struct ofport_dpif *ofport; /* Key in global 'xports map. */ | |
131 | ||
132 | struct hmap_node ofp_node; /* Node in parent xbridge 'xports' map. */ | |
133 | ofp_port_t ofp_port; /* Key in parent xbridge 'xports' map. */ | |
134 | ||
135 | odp_port_t odp_port; /* Datapath port number or ODPP_NONE. */ | |
136 | ||
137 | struct list bundle_node; /* In parent xbundle (if it exists). */ | |
138 | struct xbundle *xbundle; /* Parent xbundle or null. */ | |
139 | ||
140 | struct netdev *netdev; /* 'ofport''s netdev. */ | |
141 | ||
142 | struct xbridge *xbridge; /* Parent bridge. */ | |
143 | struct xport *peer; /* Patch port peer or null. */ | |
144 | ||
145 | enum ofputil_port_config config; /* OpenFlow port configuration. */ | |
dd8cd4b4 | 146 | enum ofputil_port_state state; /* OpenFlow port state. */ |
92cf817b | 147 | int stp_port_no; /* STP port number or -1 if not in use. */ |
46c88433 | 148 | |
55954f6e EJ |
149 | struct hmap skb_priorities; /* Map of 'skb_priority_to_dscp's. */ |
150 | ||
46c88433 EJ |
151 | bool may_enable; /* May be enabled in bonds. */ |
152 | bool is_tunnel; /* Is a tunnel port. */ | |
153 | ||
154 | struct cfm *cfm; /* CFM handle or null. */ | |
155 | struct bfd *bfd; /* BFD handle or null. */ | |
156 | }; | |
157 | ||
4d0acc70 EJ |
158 | struct xlate_ctx { |
159 | struct xlate_in *xin; | |
160 | struct xlate_out *xout; | |
161 | ||
46c88433 | 162 | const struct xbridge *xbridge; |
4d0acc70 EJ |
163 | |
164 | /* Flow at the last commit. */ | |
165 | struct flow base_flow; | |
166 | ||
167 | /* Tunnel IP destination address as received. This is stored separately | |
168 | * as the base_flow.tunnel is cleared on init to reflect the datapath | |
169 | * behavior. Used to make sure not to send tunneled output to ourselves, | |
170 | * which might lead to an infinite loop. This could happen easily | |
171 | * if a tunnel is marked as 'ip_remote=flow', and the flow does not | |
172 | * actually set the tun_dst field. */ | |
173 | ovs_be32 orig_tunnel_ip_dst; | |
174 | ||
175 | /* Stack for the push and pop actions. Each stack element is of type | |
176 | * "union mf_subvalue". */ | |
177 | union mf_subvalue init_stack[1024 / sizeof(union mf_subvalue)]; | |
178 | struct ofpbuf stack; | |
179 | ||
180 | /* The rule that we are currently translating, or NULL. */ | |
181 | struct rule_dpif *rule; | |
182 | ||
98b07853 BP |
183 | /* Resubmit statistics, via xlate_table_action(). */ |
184 | int recurse; /* Current resubmit nesting depth. */ | |
185 | int resubmits; /* Total number of resubmits. */ | |
5a070238 | 186 | bool in_group; /* Currently translating ofgroup, if true. */ |
98b07853 | 187 | |
4d0acc70 EJ |
188 | uint32_t orig_skb_priority; /* Priority when packet arrived. */ |
189 | uint8_t table_id; /* OpenFlow table ID where flow was found. */ | |
190 | uint32_t sflow_n_outputs; /* Number of output ports. */ | |
4e022ec0 | 191 | odp_port_t sflow_odp_port; /* Output port for composing sFlow action. */ |
4d0acc70 EJ |
192 | uint16_t user_cookie_offset;/* Used for user_action_cookie fixup. */ |
193 | bool exit; /* No further actions should be processed. */ | |
7fdb60a7 SH |
194 | |
195 | /* OpenFlow 1.1+ action set. | |
196 | * | |
197 | * 'action_set' accumulates "struct ofpact"s added by OFPACT_WRITE_ACTIONS. | |
198 | * When translation is otherwise complete, ofpacts_execute_action_set() | |
199 | * converts it to a set of "struct ofpact"s that can be translated into | |
200 | * datapath actions. */ | |
201 | struct ofpbuf action_set; /* Action set. */ | |
202 | uint64_t action_set_stub[1024 / 8]; | |
4d0acc70 EJ |
203 | }; |
204 | ||
9583bc14 EJ |
205 | /* A controller may use OFPP_NONE as the ingress port to indicate that |
206 | * it did not arrive on a "real" port. 'ofpp_none_bundle' exists for | |
207 | * when an input bundle is needed for validation (e.g., mirroring or | |
208 | * OFPP_NORMAL processing). It is not connected to an 'ofproto' or have | |
3548d242 BP |
209 | * any 'port' structs, so care must be taken when dealing with it. */ |
210 | static struct xbundle ofpp_none_bundle = { | |
211 | .name = "OFPP_NONE", | |
212 | .vlan_mode = PORT_VLAN_TRUNK | |
213 | }; | |
9583bc14 | 214 | |
55954f6e EJ |
215 | /* Node in 'xport''s 'skb_priorities' map. Used to maintain a map from |
216 | * 'priority' (the datapath's term for QoS queue) to the dscp bits which all | |
217 | * traffic egressing the 'ofport' with that priority should be marked with. */ | |
218 | struct skb_priority_to_dscp { | |
219 | struct hmap_node hmap_node; /* Node in 'ofport_dpif''s 'skb_priorities'. */ | |
220 | uint32_t skb_priority; /* Priority of this queue (see struct flow). */ | |
221 | ||
222 | uint8_t dscp; /* DSCP bits to mark outgoing traffic with. */ | |
223 | }; | |
224 | ||
b256dc52 JS |
225 | enum xc_type { |
226 | XC_RULE, | |
227 | XC_BOND, | |
228 | XC_NETDEV, | |
229 | XC_NETFLOW, | |
230 | XC_MIRROR, | |
231 | XC_LEARN, | |
232 | XC_NORMAL, | |
233 | XC_FIN_TIMEOUT, | |
234 | }; | |
235 | ||
236 | /* xlate_cache entries hold enough information to perform the side effects of | |
237 | * xlate_actions() for a rule, without needing to perform rule translation | |
238 | * from scratch. The primary usage of these is to submit statistics to objects | |
239 | * that a flow relates to, although they may be used for other effects as well | |
240 | * (for instance, refreshing hard timeouts for learned flows). */ | |
241 | struct xc_entry { | |
242 | enum xc_type type; | |
243 | union { | |
244 | struct rule_dpif *rule; | |
245 | struct { | |
246 | struct netdev *tx; | |
247 | struct netdev *rx; | |
248 | struct bfd *bfd; | |
249 | } dev; | |
250 | struct { | |
251 | struct netflow *netflow; | |
252 | struct flow *flow; | |
253 | ofp_port_t iface; | |
254 | } nf; | |
255 | struct { | |
256 | struct mbridge *mbridge; | |
257 | mirror_mask_t mirrors; | |
258 | } mirror; | |
259 | struct { | |
260 | struct bond *bond; | |
261 | struct flow *flow; | |
262 | uint16_t vid; | |
263 | } bond; | |
264 | struct { | |
265 | struct ofproto_dpif *ofproto; | |
266 | struct rule_dpif *rule; | |
267 | } learn; | |
268 | struct { | |
269 | struct ofproto_dpif *ofproto; | |
270 | struct flow *flow; | |
271 | int vlan; | |
272 | } normal; | |
273 | struct { | |
274 | struct rule_dpif *rule; | |
275 | uint16_t idle; | |
276 | uint16_t hard; | |
277 | } fin; | |
278 | } u; | |
279 | }; | |
280 | ||
281 | #define XC_ENTRY_FOR_EACH(entry, entries, xcache) \ | |
282 | entries = xcache->entries; \ | |
283 | for (entry = ofpbuf_try_pull(&entries, sizeof *entry); \ | |
284 | entry; \ | |
285 | entry = ofpbuf_try_pull(&entries, sizeof *entry)) | |
286 | ||
287 | struct xlate_cache { | |
288 | struct ofpbuf entries; | |
289 | }; | |
290 | ||
46c88433 EJ |
291 | static struct hmap xbridges = HMAP_INITIALIZER(&xbridges); |
292 | static struct hmap xbundles = HMAP_INITIALIZER(&xbundles); | |
293 | static struct hmap xports = HMAP_INITIALIZER(&xports); | |
294 | ||
295 | static bool may_receive(const struct xport *, struct xlate_ctx *); | |
9583bc14 EJ |
296 | static void do_xlate_actions(const struct ofpact *, size_t ofpacts_len, |
297 | struct xlate_ctx *); | |
91d6cd12 AW |
298 | static void xlate_actions__(struct xlate_in *, struct xlate_out *) |
299 | OVS_REQ_RDLOCK(xlate_rwlock); | |
adcf00ba AZ |
300 | static void xlate_normal(struct xlate_ctx *); |
301 | static void xlate_report(struct xlate_ctx *, const char *); | |
6d328fa2 SH |
302 | static void xlate_table_action(struct xlate_ctx *, ofp_port_t in_port, |
303 | uint8_t table_id, bool may_packet_in, | |
304 | bool honor_table_miss); | |
46c88433 EJ |
305 | static bool input_vid_is_valid(uint16_t vid, struct xbundle *, bool warn); |
306 | static uint16_t input_vid_to_vlan(const struct xbundle *, uint16_t vid); | |
307 | static void output_normal(struct xlate_ctx *, const struct xbundle *, | |
9583bc14 | 308 | uint16_t vlan); |
4e022ec0 | 309 | static void compose_output_action(struct xlate_ctx *, ofp_port_t ofp_port); |
9583bc14 | 310 | |
46c88433 EJ |
311 | static struct xbridge *xbridge_lookup(const struct ofproto_dpif *); |
312 | static struct xbundle *xbundle_lookup(const struct ofbundle *); | |
5e6af486 | 313 | static struct xport *xport_lookup(const struct ofport_dpif *); |
46c88433 | 314 | static struct xport *get_ofp_port(const struct xbridge *, ofp_port_t ofp_port); |
55954f6e EJ |
315 | static struct skb_priority_to_dscp *get_skb_priority(const struct xport *, |
316 | uint32_t skb_priority); | |
317 | static void clear_skb_priorities(struct xport *); | |
318 | static bool dscp_from_skb_priority(const struct xport *, uint32_t skb_priority, | |
319 | uint8_t *dscp); | |
46c88433 | 320 | |
b256dc52 JS |
321 | static struct xc_entry *xlate_cache_add_entry(struct xlate_cache *xc, |
322 | enum xc_type type); | |
323 | ||
46c88433 EJ |
324 | void |
325 | xlate_ofproto_set(struct ofproto_dpif *ofproto, const char *name, | |
ec89fc6f EJ |
326 | struct dpif *dpif, struct rule_dpif *miss_rule, |
327 | struct rule_dpif *no_packet_in_rule, | |
328 | const struct mac_learning *ml, struct stp *stp, | |
329 | const struct mbridge *mbridge, | |
46c88433 | 330 | const struct dpif_sflow *sflow, |
ce3955be EJ |
331 | const struct dpif_ipfix *ipfix, |
332 | const struct netflow *netflow, enum ofp_config_flags frag, | |
4b97b70d | 333 | bool forward_bpdu, bool has_in_band, |
adcf00ba | 334 | bool enable_recirc, |
8bfd0fda BP |
335 | bool variable_length_userdata, |
336 | size_t max_mpls_depth) | |
46c88433 EJ |
337 | { |
338 | struct xbridge *xbridge = xbridge_lookup(ofproto); | |
339 | ||
340 | if (!xbridge) { | |
341 | xbridge = xzalloc(sizeof *xbridge); | |
342 | xbridge->ofproto = ofproto; | |
343 | ||
344 | hmap_insert(&xbridges, &xbridge->hmap_node, hash_pointer(ofproto, 0)); | |
345 | hmap_init(&xbridge->xports); | |
346 | list_init(&xbridge->xbundles); | |
347 | } | |
348 | ||
349 | if (xbridge->ml != ml) { | |
350 | mac_learning_unref(xbridge->ml); | |
351 | xbridge->ml = mac_learning_ref(ml); | |
352 | } | |
353 | ||
354 | if (xbridge->mbridge != mbridge) { | |
355 | mbridge_unref(xbridge->mbridge); | |
356 | xbridge->mbridge = mbridge_ref(mbridge); | |
357 | } | |
358 | ||
359 | if (xbridge->sflow != sflow) { | |
360 | dpif_sflow_unref(xbridge->sflow); | |
361 | xbridge->sflow = dpif_sflow_ref(sflow); | |
362 | } | |
363 | ||
364 | if (xbridge->ipfix != ipfix) { | |
365 | dpif_ipfix_unref(xbridge->ipfix); | |
366 | xbridge->ipfix = dpif_ipfix_ref(ipfix); | |
367 | } | |
368 | ||
9d189a50 EJ |
369 | if (xbridge->stp != stp) { |
370 | stp_unref(xbridge->stp); | |
371 | xbridge->stp = stp_ref(stp); | |
372 | } | |
373 | ||
ce3955be EJ |
374 | if (xbridge->netflow != netflow) { |
375 | netflow_unref(xbridge->netflow); | |
376 | xbridge->netflow = netflow_ref(netflow); | |
377 | } | |
378 | ||
46c88433 EJ |
379 | free(xbridge->name); |
380 | xbridge->name = xstrdup(name); | |
381 | ||
89a8a7f0 | 382 | xbridge->dpif = dpif; |
46c88433 EJ |
383 | xbridge->forward_bpdu = forward_bpdu; |
384 | xbridge->has_in_band = has_in_band; | |
46c88433 | 385 | xbridge->frag = frag; |
ec89fc6f EJ |
386 | xbridge->miss_rule = miss_rule; |
387 | xbridge->no_packet_in_rule = no_packet_in_rule; | |
adcf00ba | 388 | xbridge->enable_recirc = enable_recirc; |
4b97b70d | 389 | xbridge->variable_length_userdata = variable_length_userdata; |
8bfd0fda | 390 | xbridge->max_mpls_depth = max_mpls_depth; |
46c88433 EJ |
391 | } |
392 | ||
393 | void | |
394 | xlate_remove_ofproto(struct ofproto_dpif *ofproto) | |
395 | { | |
396 | struct xbridge *xbridge = xbridge_lookup(ofproto); | |
397 | struct xbundle *xbundle, *next_xbundle; | |
398 | struct xport *xport, *next_xport; | |
399 | ||
400 | if (!xbridge) { | |
401 | return; | |
402 | } | |
403 | ||
404 | HMAP_FOR_EACH_SAFE (xport, next_xport, ofp_node, &xbridge->xports) { | |
405 | xlate_ofport_remove(xport->ofport); | |
406 | } | |
407 | ||
408 | LIST_FOR_EACH_SAFE (xbundle, next_xbundle, list_node, &xbridge->xbundles) { | |
409 | xlate_bundle_remove(xbundle->ofbundle); | |
410 | } | |
411 | ||
412 | hmap_remove(&xbridges, &xbridge->hmap_node); | |
795cc5c1 EJ |
413 | mac_learning_unref(xbridge->ml); |
414 | mbridge_unref(xbridge->mbridge); | |
415 | dpif_sflow_unref(xbridge->sflow); | |
416 | dpif_ipfix_unref(xbridge->ipfix); | |
417 | stp_unref(xbridge->stp); | |
418 | hmap_destroy(&xbridge->xports); | |
46c88433 EJ |
419 | free(xbridge->name); |
420 | free(xbridge); | |
421 | } | |
422 | ||
423 | void | |
424 | xlate_bundle_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle, | |
425 | const char *name, enum port_vlan_mode vlan_mode, int vlan, | |
426 | unsigned long *trunks, bool use_priority_tags, | |
427 | const struct bond *bond, const struct lacp *lacp, | |
428 | bool floodable) | |
429 | { | |
430 | struct xbundle *xbundle = xbundle_lookup(ofbundle); | |
431 | ||
432 | if (!xbundle) { | |
433 | xbundle = xzalloc(sizeof *xbundle); | |
434 | xbundle->ofbundle = ofbundle; | |
435 | xbundle->xbridge = xbridge_lookup(ofproto); | |
436 | ||
437 | hmap_insert(&xbundles, &xbundle->hmap_node, hash_pointer(ofbundle, 0)); | |
438 | list_insert(&xbundle->xbridge->xbundles, &xbundle->list_node); | |
439 | list_init(&xbundle->xports); | |
440 | } | |
441 | ||
442 | ovs_assert(xbundle->xbridge); | |
443 | ||
444 | free(xbundle->name); | |
445 | xbundle->name = xstrdup(name); | |
446 | ||
447 | xbundle->vlan_mode = vlan_mode; | |
448 | xbundle->vlan = vlan; | |
449 | xbundle->trunks = trunks; | |
450 | xbundle->use_priority_tags = use_priority_tags; | |
451 | xbundle->floodable = floodable; | |
452 | ||
453 | if (xbundle->bond != bond) { | |
454 | bond_unref(xbundle->bond); | |
455 | xbundle->bond = bond_ref(bond); | |
456 | } | |
457 | ||
458 | if (xbundle->lacp != lacp) { | |
459 | lacp_unref(xbundle->lacp); | |
460 | xbundle->lacp = lacp_ref(lacp); | |
461 | } | |
462 | } | |
463 | ||
464 | void | |
465 | xlate_bundle_remove(struct ofbundle *ofbundle) | |
466 | { | |
467 | struct xbundle *xbundle = xbundle_lookup(ofbundle); | |
468 | struct xport *xport, *next; | |
469 | ||
470 | if (!xbundle) { | |
471 | return; | |
472 | } | |
473 | ||
474 | LIST_FOR_EACH_SAFE (xport, next, bundle_node, &xbundle->xports) { | |
475 | list_remove(&xport->bundle_node); | |
476 | xport->xbundle = NULL; | |
477 | } | |
478 | ||
479 | hmap_remove(&xbundles, &xbundle->hmap_node); | |
480 | list_remove(&xbundle->list_node); | |
481 | bond_unref(xbundle->bond); | |
482 | lacp_unref(xbundle->lacp); | |
483 | free(xbundle->name); | |
484 | free(xbundle); | |
485 | } | |
486 | ||
487 | void | |
488 | xlate_ofport_set(struct ofproto_dpif *ofproto, struct ofbundle *ofbundle, | |
489 | struct ofport_dpif *ofport, ofp_port_t ofp_port, | |
490 | odp_port_t odp_port, const struct netdev *netdev, | |
491 | const struct cfm *cfm, const struct bfd *bfd, | |
9d189a50 | 492 | struct ofport_dpif *peer, int stp_port_no, |
55954f6e | 493 | const struct ofproto_port_queue *qdscp_list, size_t n_qdscp, |
dd8cd4b4 SH |
494 | enum ofputil_port_config config, |
495 | enum ofputil_port_state state, bool is_tunnel, | |
9d189a50 | 496 | bool may_enable) |
46c88433 EJ |
497 | { |
498 | struct xport *xport = xport_lookup(ofport); | |
55954f6e | 499 | size_t i; |
46c88433 EJ |
500 | |
501 | if (!xport) { | |
502 | xport = xzalloc(sizeof *xport); | |
503 | xport->ofport = ofport; | |
504 | xport->xbridge = xbridge_lookup(ofproto); | |
505 | xport->ofp_port = ofp_port; | |
506 | ||
55954f6e | 507 | hmap_init(&xport->skb_priorities); |
46c88433 EJ |
508 | hmap_insert(&xports, &xport->hmap_node, hash_pointer(ofport, 0)); |
509 | hmap_insert(&xport->xbridge->xports, &xport->ofp_node, | |
510 | hash_ofp_port(xport->ofp_port)); | |
511 | } | |
512 | ||
513 | ovs_assert(xport->ofp_port == ofp_port); | |
514 | ||
515 | xport->config = config; | |
dd8cd4b4 | 516 | xport->state = state; |
9d189a50 | 517 | xport->stp_port_no = stp_port_no; |
46c88433 EJ |
518 | xport->is_tunnel = is_tunnel; |
519 | xport->may_enable = may_enable; | |
520 | xport->odp_port = odp_port; | |
521 | ||
522 | if (xport->netdev != netdev) { | |
523 | netdev_close(xport->netdev); | |
524 | xport->netdev = netdev_ref(netdev); | |
525 | } | |
526 | ||
527 | if (xport->cfm != cfm) { | |
528 | cfm_unref(xport->cfm); | |
529 | xport->cfm = cfm_ref(cfm); | |
530 | } | |
531 | ||
532 | if (xport->bfd != bfd) { | |
533 | bfd_unref(xport->bfd); | |
534 | xport->bfd = bfd_ref(bfd); | |
535 | } | |
536 | ||
537 | if (xport->peer) { | |
538 | xport->peer->peer = NULL; | |
539 | } | |
5e6af486 | 540 | xport->peer = xport_lookup(peer); |
46c88433 EJ |
541 | if (xport->peer) { |
542 | xport->peer->peer = xport; | |
543 | } | |
544 | ||
545 | if (xport->xbundle) { | |
546 | list_remove(&xport->bundle_node); | |
547 | } | |
5e6af486 | 548 | xport->xbundle = xbundle_lookup(ofbundle); |
46c88433 EJ |
549 | if (xport->xbundle) { |
550 | list_insert(&xport->xbundle->xports, &xport->bundle_node); | |
551 | } | |
55954f6e EJ |
552 | |
553 | clear_skb_priorities(xport); | |
554 | for (i = 0; i < n_qdscp; i++) { | |
555 | struct skb_priority_to_dscp *pdscp; | |
556 | uint32_t skb_priority; | |
557 | ||
89a8a7f0 EJ |
558 | if (dpif_queue_to_priority(xport->xbridge->dpif, qdscp_list[i].queue, |
559 | &skb_priority)) { | |
55954f6e EJ |
560 | continue; |
561 | } | |
562 | ||
563 | pdscp = xmalloc(sizeof *pdscp); | |
564 | pdscp->skb_priority = skb_priority; | |
565 | pdscp->dscp = (qdscp_list[i].dscp << 2) & IP_DSCP_MASK; | |
566 | hmap_insert(&xport->skb_priorities, &pdscp->hmap_node, | |
567 | hash_int(pdscp->skb_priority, 0)); | |
568 | } | |
46c88433 EJ |
569 | } |
570 | ||
571 | void | |
572 | xlate_ofport_remove(struct ofport_dpif *ofport) | |
573 | { | |
574 | struct xport *xport = xport_lookup(ofport); | |
575 | ||
576 | if (!xport) { | |
577 | return; | |
578 | } | |
579 | ||
580 | if (xport->peer) { | |
581 | xport->peer->peer = NULL; | |
582 | xport->peer = NULL; | |
583 | } | |
584 | ||
e621a12d EJ |
585 | if (xport->xbundle) { |
586 | list_remove(&xport->bundle_node); | |
587 | } | |
588 | ||
55954f6e EJ |
589 | clear_skb_priorities(xport); |
590 | hmap_destroy(&xport->skb_priorities); | |
591 | ||
46c88433 EJ |
592 | hmap_remove(&xports, &xport->hmap_node); |
593 | hmap_remove(&xport->xbridge->xports, &xport->ofp_node); | |
594 | ||
595 | netdev_close(xport->netdev); | |
596 | cfm_unref(xport->cfm); | |
597 | bfd_unref(xport->bfd); | |
598 | free(xport); | |
599 | } | |
600 | ||
8449c4d6 EJ |
601 | /* Given a datpath, packet, and flow metadata ('backer', 'packet', and 'key' |
602 | * respectively), populates 'flow' with the result of odp_flow_key_to_flow(). | |
836fbda7 SH |
603 | * Optionally populates 'ofproto' with the ofproto_dpif, 'odp_in_port' with |
604 | * the datapath in_port, that 'packet' ingressed, and 'ipfix', 'sflow', and | |
605 | * 'netflow' with the appropriate handles for those protocols if they're | |
606 | * enabled. Caller is responsible for unrefing them. | |
8449c4d6 EJ |
607 | * |
608 | * If 'ofproto' is nonnull, requires 'flow''s in_port to exist. Otherwise sets | |
609 | * 'flow''s in_port to OFPP_NONE. | |
610 | * | |
611 | * This function does post-processing on data returned from | |
612 | * odp_flow_key_to_flow() to help make VLAN splinters transparent to the rest | |
613 | * of the upcall processing logic. In particular, if the extracted in_port is | |
614 | * a VLAN splinter port, it replaces flow->in_port by the "real" port, sets | |
615 | * flow->vlan_tci correctly for the VLAN of the VLAN splinter port, and pushes | |
616 | * a VLAN header onto 'packet' (if it is nonnull). | |
617 | * | |
618 | * Similarly, this function also includes some logic to help with tunnels. It | |
619 | * may modify 'flow' as necessary to make the tunneling implementation | |
620 | * transparent to the upcall processing logic. | |
621 | * | |
622 | * Returns 0 if successful, ENODEV if the parsed flow has no associated ofport, | |
623 | * or some other positive errno if there are other problems. */ | |
624 | int | |
625 | xlate_receive(const struct dpif_backer *backer, struct ofpbuf *packet, | |
836fbda7 | 626 | const struct nlattr *key, size_t key_len, struct flow *flow, |
1dfdb9b3 EJ |
627 | struct ofproto_dpif **ofproto, struct dpif_ipfix **ipfix, |
628 | struct dpif_sflow **sflow, struct netflow **netflow, | |
629 | odp_port_t *odp_in_port) | |
8449c4d6 | 630 | { |
8449c4d6 EJ |
631 | const struct xport *xport; |
632 | int error = ENODEV; | |
633 | ||
dc24a00f | 634 | ovs_rwlock_rdlock(&xlate_rwlock); |
836fbda7 | 635 | if (odp_flow_key_to_flow(key, key_len, flow) == ODP_FIT_ERROR) { |
8449c4d6 EJ |
636 | error = EINVAL; |
637 | goto exit; | |
638 | } | |
639 | ||
640 | if (odp_in_port) { | |
641 | *odp_in_port = flow->in_port.odp_port; | |
642 | } | |
643 | ||
644 | xport = xport_lookup(tnl_port_should_receive(flow) | |
d6fc5f57 EJ |
645 | ? tnl_port_receive(flow) |
646 | : odp_port_to_ofport(backer, flow->in_port.odp_port)); | |
8449c4d6 EJ |
647 | |
648 | flow->in_port.ofp_port = xport ? xport->ofp_port : OFPP_NONE; | |
649 | if (!xport) { | |
650 | goto exit; | |
651 | } | |
652 | ||
653 | if (vsp_adjust_flow(xport->xbridge->ofproto, flow)) { | |
654 | if (packet) { | |
655 | /* Make the packet resemble the flow, so that it gets sent to | |
656 | * an OpenFlow controller properly, so that it looks correct | |
657 | * for sFlow, and so that flow_extract() will get the correct | |
da546e07 | 658 | * vlan_tci if it is called on 'packet'. */ |
1bf02876 | 659 | eth_push_vlan(packet, htons(ETH_TYPE_VLAN), flow->vlan_tci); |
8449c4d6 | 660 | } |
8449c4d6 EJ |
661 | } |
662 | error = 0; | |
663 | ||
664 | if (ofproto) { | |
665 | *ofproto = xport->xbridge->ofproto; | |
666 | } | |
667 | ||
1dfdb9b3 EJ |
668 | if (ipfix) { |
669 | *ipfix = dpif_ipfix_ref(xport->xbridge->ipfix); | |
670 | } | |
671 | ||
672 | if (sflow) { | |
673 | *sflow = dpif_sflow_ref(xport->xbridge->sflow); | |
674 | } | |
675 | ||
676 | if (netflow) { | |
677 | *netflow = netflow_ref(xport->xbridge->netflow); | |
678 | } | |
679 | ||
8449c4d6 | 680 | exit: |
dc24a00f | 681 | ovs_rwlock_unlock(&xlate_rwlock); |
8449c4d6 EJ |
682 | return error; |
683 | } | |
684 | ||
46c88433 EJ |
685 | static struct xbridge * |
686 | xbridge_lookup(const struct ofproto_dpif *ofproto) | |
687 | { | |
688 | struct xbridge *xbridge; | |
689 | ||
5e6af486 EJ |
690 | if (!ofproto) { |
691 | return NULL; | |
692 | } | |
693 | ||
46c88433 EJ |
694 | HMAP_FOR_EACH_IN_BUCKET (xbridge, hmap_node, hash_pointer(ofproto, 0), |
695 | &xbridges) { | |
696 | if (xbridge->ofproto == ofproto) { | |
697 | return xbridge; | |
698 | } | |
699 | } | |
700 | return NULL; | |
701 | } | |
702 | ||
703 | static struct xbundle * | |
704 | xbundle_lookup(const struct ofbundle *ofbundle) | |
705 | { | |
706 | struct xbundle *xbundle; | |
707 | ||
5e6af486 EJ |
708 | if (!ofbundle) { |
709 | return NULL; | |
710 | } | |
711 | ||
46c88433 EJ |
712 | HMAP_FOR_EACH_IN_BUCKET (xbundle, hmap_node, hash_pointer(ofbundle, 0), |
713 | &xbundles) { | |
714 | if (xbundle->ofbundle == ofbundle) { | |
715 | return xbundle; | |
716 | } | |
717 | } | |
718 | return NULL; | |
719 | } | |
720 | ||
721 | static struct xport * | |
5e6af486 | 722 | xport_lookup(const struct ofport_dpif *ofport) |
46c88433 EJ |
723 | { |
724 | struct xport *xport; | |
725 | ||
5e6af486 EJ |
726 | if (!ofport) { |
727 | return NULL; | |
728 | } | |
729 | ||
46c88433 EJ |
730 | HMAP_FOR_EACH_IN_BUCKET (xport, hmap_node, hash_pointer(ofport, 0), |
731 | &xports) { | |
732 | if (xport->ofport == ofport) { | |
733 | return xport; | |
734 | } | |
735 | } | |
736 | return NULL; | |
737 | } | |
738 | ||
40085e56 EJ |
739 | static struct stp_port * |
740 | xport_get_stp_port(const struct xport *xport) | |
741 | { | |
92cf817b | 742 | return xport->xbridge->stp && xport->stp_port_no != -1 |
40085e56 EJ |
743 | ? stp_get_port(xport->xbridge->stp, xport->stp_port_no) |
744 | : NULL; | |
745 | } | |
9d189a50 | 746 | |
0d1cee12 | 747 | static bool |
9d189a50 EJ |
748 | xport_stp_learn_state(const struct xport *xport) |
749 | { | |
40085e56 EJ |
750 | struct stp_port *sp = xport_get_stp_port(xport); |
751 | return stp_learn_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED); | |
9d189a50 EJ |
752 | } |
753 | ||
754 | static bool | |
755 | xport_stp_forward_state(const struct xport *xport) | |
756 | { | |
40085e56 EJ |
757 | struct stp_port *sp = xport_get_stp_port(xport); |
758 | return stp_forward_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED); | |
9d189a50 EJ |
759 | } |
760 | ||
0d1cee12 K |
761 | static bool |
762 | xport_stp_listen_state(const struct xport *xport) | |
763 | { | |
764 | struct stp_port *sp = xport_get_stp_port(xport); | |
765 | return stp_listen_in_state(sp ? stp_port_get_state(sp) : STP_DISABLED); | |
766 | } | |
767 | ||
9d189a50 EJ |
768 | /* Returns true if STP should process 'flow'. Sets fields in 'wc' that |
769 | * were used to make the determination.*/ | |
770 | static bool | |
771 | stp_should_process_flow(const struct flow *flow, struct flow_wildcards *wc) | |
772 | { | |
bbbca389 | 773 | /* is_stp() also checks dl_type, but dl_type is always set in 'wc'. */ |
9d189a50 | 774 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); |
bbbca389 | 775 | return is_stp(flow); |
9d189a50 EJ |
776 | } |
777 | ||
778 | static void | |
779 | stp_process_packet(const struct xport *xport, const struct ofpbuf *packet) | |
780 | { | |
40085e56 | 781 | struct stp_port *sp = xport_get_stp_port(xport); |
9d189a50 | 782 | struct ofpbuf payload = *packet; |
1f317cb5 | 783 | struct eth_header *eth = ofpbuf_data(&payload); |
9d189a50 EJ |
784 | |
785 | /* Sink packets on ports that have STP disabled when the bridge has | |
786 | * STP enabled. */ | |
787 | if (!sp || stp_port_get_state(sp) == STP_DISABLED) { | |
788 | return; | |
789 | } | |
790 | ||
791 | /* Trim off padding on payload. */ | |
1f317cb5 PS |
792 | if (ofpbuf_size(&payload) > ntohs(eth->eth_type) + ETH_HEADER_LEN) { |
793 | ofpbuf_set_size(&payload, ntohs(eth->eth_type) + ETH_HEADER_LEN); | |
9d189a50 EJ |
794 | } |
795 | ||
796 | if (ofpbuf_try_pull(&payload, ETH_HEADER_LEN + LLC_HEADER_LEN)) { | |
1f317cb5 | 797 | stp_received_bpdu(sp, ofpbuf_data(&payload), ofpbuf_size(&payload)); |
9d189a50 EJ |
798 | } |
799 | } | |
800 | ||
46c88433 EJ |
801 | static struct xport * |
802 | get_ofp_port(const struct xbridge *xbridge, ofp_port_t ofp_port) | |
803 | { | |
804 | struct xport *xport; | |
805 | ||
806 | HMAP_FOR_EACH_IN_BUCKET (xport, ofp_node, hash_ofp_port(ofp_port), | |
807 | &xbridge->xports) { | |
808 | if (xport->ofp_port == ofp_port) { | |
809 | return xport; | |
810 | } | |
811 | } | |
812 | return NULL; | |
813 | } | |
814 | ||
815 | static odp_port_t | |
816 | ofp_port_to_odp_port(const struct xbridge *xbridge, ofp_port_t ofp_port) | |
817 | { | |
818 | const struct xport *xport = get_ofp_port(xbridge, ofp_port); | |
819 | return xport ? xport->odp_port : ODPP_NONE; | |
820 | } | |
821 | ||
dd8cd4b4 SH |
822 | static bool |
823 | odp_port_is_alive(const struct xlate_ctx *ctx, ofp_port_t ofp_port) | |
824 | { | |
825 | struct xport *xport; | |
826 | ||
827 | xport = get_ofp_port(ctx->xbridge, ofp_port); | |
828 | if (!xport || xport->config & OFPUTIL_PC_PORT_DOWN || | |
829 | xport->state & OFPUTIL_PS_LINK_DOWN) { | |
830 | return false; | |
831 | } | |
832 | ||
833 | return true; | |
834 | } | |
835 | ||
836 | static const struct ofputil_bucket * | |
837 | group_first_live_bucket(const struct xlate_ctx *, const struct group_dpif *, | |
838 | int depth); | |
839 | ||
840 | static bool | |
841 | group_is_alive(const struct xlate_ctx *ctx, uint32_t group_id, int depth) | |
842 | { | |
843 | struct group_dpif *group; | |
844 | bool hit; | |
845 | ||
846 | hit = group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group); | |
847 | if (!hit) { | |
848 | return false; | |
849 | } | |
850 | ||
851 | hit = group_first_live_bucket(ctx, group, depth) != NULL; | |
852 | ||
853 | group_dpif_release(group); | |
854 | return hit; | |
855 | } | |
856 | ||
857 | #define MAX_LIVENESS_RECURSION 128 /* Arbitrary limit */ | |
858 | ||
859 | static bool | |
860 | bucket_is_alive(const struct xlate_ctx *ctx, | |
861 | const struct ofputil_bucket *bucket, int depth) | |
862 | { | |
863 | if (depth >= MAX_LIVENESS_RECURSION) { | |
864 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); | |
865 | ||
866 | VLOG_WARN_RL(&rl, "bucket chaining exceeded %d links", | |
867 | MAX_LIVENESS_RECURSION); | |
868 | return false; | |
869 | } | |
870 | ||
fe7e5749 | 871 | return !ofputil_bucket_has_liveness(bucket) || |
d6fc5f57 EJ |
872 | (bucket->watch_port != OFPP_ANY && |
873 | odp_port_is_alive(ctx, bucket->watch_port)) || | |
874 | (bucket->watch_group != OFPG_ANY && | |
875 | group_is_alive(ctx, bucket->watch_group, depth + 1)); | |
dd8cd4b4 SH |
876 | } |
877 | ||
878 | static const struct ofputil_bucket * | |
879 | group_first_live_bucket(const struct xlate_ctx *ctx, | |
880 | const struct group_dpif *group, int depth) | |
881 | { | |
882 | struct ofputil_bucket *bucket; | |
883 | const struct list *buckets; | |
884 | ||
885 | group_dpif_get_buckets(group, &buckets); | |
886 | LIST_FOR_EACH (bucket, list_node, buckets) { | |
887 | if (bucket_is_alive(ctx, bucket, depth)) { | |
888 | return bucket; | |
889 | } | |
890 | } | |
891 | ||
892 | return NULL; | |
893 | } | |
894 | ||
fe7e5749 SH |
895 | static const struct ofputil_bucket * |
896 | group_best_live_bucket(const struct xlate_ctx *ctx, | |
897 | const struct group_dpif *group, | |
898 | uint32_t basis) | |
899 | { | |
900 | const struct ofputil_bucket *best_bucket = NULL; | |
901 | uint32_t best_score = 0; | |
902 | int i = 0; | |
903 | ||
904 | const struct ofputil_bucket *bucket; | |
905 | const struct list *buckets; | |
906 | ||
907 | group_dpif_get_buckets(group, &buckets); | |
908 | LIST_FOR_EACH (bucket, list_node, buckets) { | |
909 | if (bucket_is_alive(ctx, bucket, 0)) { | |
7cb279c2 | 910 | uint32_t score = (hash_int(i, basis) & 0xffff) * bucket->weight; |
fe7e5749 SH |
911 | if (score >= best_score) { |
912 | best_bucket = bucket; | |
913 | best_score = score; | |
914 | } | |
915 | } | |
916 | i++; | |
917 | } | |
918 | ||
919 | return best_bucket; | |
920 | } | |
921 | ||
9583bc14 | 922 | static bool |
46c88433 | 923 | xbundle_trunks_vlan(const struct xbundle *bundle, uint16_t vlan) |
9583bc14 EJ |
924 | { |
925 | return (bundle->vlan_mode != PORT_VLAN_ACCESS | |
926 | && (!bundle->trunks || bitmap_is_set(bundle->trunks, vlan))); | |
927 | } | |
928 | ||
929 | static bool | |
46c88433 EJ |
930 | xbundle_includes_vlan(const struct xbundle *xbundle, uint16_t vlan) |
931 | { | |
932 | return vlan == xbundle->vlan || xbundle_trunks_vlan(xbundle, vlan); | |
933 | } | |
934 | ||
935 | static mirror_mask_t | |
936 | xbundle_mirror_out(const struct xbridge *xbridge, struct xbundle *xbundle) | |
937 | { | |
938 | return xbundle != &ofpp_none_bundle | |
939 | ? mirror_bundle_out(xbridge->mbridge, xbundle->ofbundle) | |
940 | : 0; | |
941 | } | |
942 | ||
943 | static mirror_mask_t | |
944 | xbundle_mirror_src(const struct xbridge *xbridge, struct xbundle *xbundle) | |
9583bc14 | 945 | { |
46c88433 EJ |
946 | return xbundle != &ofpp_none_bundle |
947 | ? mirror_bundle_src(xbridge->mbridge, xbundle->ofbundle) | |
948 | : 0; | |
9583bc14 EJ |
949 | } |
950 | ||
46c88433 EJ |
951 | static mirror_mask_t |
952 | xbundle_mirror_dst(const struct xbridge *xbridge, struct xbundle *xbundle) | |
9583bc14 | 953 | { |
46c88433 EJ |
954 | return xbundle != &ofpp_none_bundle |
955 | ? mirror_bundle_dst(xbridge->mbridge, xbundle->ofbundle) | |
956 | : 0; | |
957 | } | |
958 | ||
959 | static struct xbundle * | |
960 | lookup_input_bundle(const struct xbridge *xbridge, ofp_port_t in_port, | |
961 | bool warn, struct xport **in_xportp) | |
962 | { | |
963 | struct xport *xport; | |
9583bc14 EJ |
964 | |
965 | /* Find the port and bundle for the received packet. */ | |
46c88433 EJ |
966 | xport = get_ofp_port(xbridge, in_port); |
967 | if (in_xportp) { | |
968 | *in_xportp = xport; | |
9583bc14 | 969 | } |
46c88433 EJ |
970 | if (xport && xport->xbundle) { |
971 | return xport->xbundle; | |
9583bc14 EJ |
972 | } |
973 | ||
6362203b YT |
974 | /* Special-case OFPP_NONE (OF1.0) and OFPP_CONTROLLER (OF1.1+), |
975 | * which a controller may use as the ingress port for traffic that | |
976 | * it is sourcing. */ | |
977 | if (in_port == OFPP_CONTROLLER || in_port == OFPP_NONE) { | |
9583bc14 EJ |
978 | return &ofpp_none_bundle; |
979 | } | |
980 | ||
981 | /* Odd. A few possible reasons here: | |
982 | * | |
983 | * - We deleted a port but there are still a few packets queued up | |
984 | * from it. | |
985 | * | |
986 | * - Someone externally added a port (e.g. "ovs-dpctl add-if") that | |
987 | * we don't know about. | |
988 | * | |
989 | * - The ofproto client didn't configure the port as part of a bundle. | |
990 | * This is particularly likely to happen if a packet was received on the | |
991 | * port after it was created, but before the client had a chance to | |
992 | * configure its bundle. | |
993 | */ | |
994 | if (warn) { | |
995 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
996 | ||
997 | VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown " | |
46c88433 | 998 | "port %"PRIu16, xbridge->name, in_port); |
9583bc14 EJ |
999 | } |
1000 | return NULL; | |
1001 | } | |
1002 | ||
1003 | static void | |
1004 | add_mirror_actions(struct xlate_ctx *ctx, const struct flow *orig_flow) | |
1005 | { | |
46c88433 | 1006 | const struct xbridge *xbridge = ctx->xbridge; |
9583bc14 | 1007 | mirror_mask_t mirrors; |
46c88433 | 1008 | struct xbundle *in_xbundle; |
9583bc14 EJ |
1009 | uint16_t vlan; |
1010 | uint16_t vid; | |
cdf5d3a5 EJ |
1011 | |
1012 | mirrors = ctx->xout->mirrors; | |
1013 | ctx->xout->mirrors = 0; | |
9583bc14 | 1014 | |
46c88433 EJ |
1015 | in_xbundle = lookup_input_bundle(xbridge, orig_flow->in_port.ofp_port, |
1016 | ctx->xin->packet != NULL, NULL); | |
1017 | if (!in_xbundle) { | |
9583bc14 EJ |
1018 | return; |
1019 | } | |
46c88433 | 1020 | mirrors |= xbundle_mirror_src(xbridge, in_xbundle); |
9583bc14 EJ |
1021 | |
1022 | /* Drop frames on bundles reserved for mirroring. */ | |
46c88433 | 1023 | if (xbundle_mirror_out(xbridge, in_xbundle)) { |
9583bc14 EJ |
1024 | if (ctx->xin->packet != NULL) { |
1025 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
1026 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port " | |
1027 | "%s, which is reserved exclusively for mirroring", | |
46c88433 | 1028 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 | 1029 | } |
aaa0fbae | 1030 | ofpbuf_clear(&ctx->xout->odp_actions); |
9583bc14 EJ |
1031 | return; |
1032 | } | |
1033 | ||
1034 | /* Check VLAN. */ | |
1035 | vid = vlan_tci_to_vid(orig_flow->vlan_tci); | |
46c88433 | 1036 | if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) { |
9583bc14 EJ |
1037 | return; |
1038 | } | |
46c88433 | 1039 | vlan = input_vid_to_vlan(in_xbundle, vid); |
9583bc14 | 1040 | |
9583bc14 EJ |
1041 | if (!mirrors) { |
1042 | return; | |
1043 | } | |
1044 | ||
1045 | /* Restore the original packet before adding the mirror actions. */ | |
1046 | ctx->xin->flow = *orig_flow; | |
1047 | ||
1048 | while (mirrors) { | |
ec7ceaed EJ |
1049 | mirror_mask_t dup_mirrors; |
1050 | struct ofbundle *out; | |
1051 | unsigned long *vlans; | |
1052 | bool vlan_mirrored; | |
1053 | bool has_mirror; | |
1054 | int out_vlan; | |
1055 | ||
4b6ab2b0 | 1056 | has_mirror = mirror_get(xbridge->mbridge, raw_ctz(mirrors), |
ec7ceaed EJ |
1057 | &vlans, &dup_mirrors, &out, &out_vlan); |
1058 | ovs_assert(has_mirror); | |
1059 | ||
1060 | if (vlans) { | |
9583bc14 EJ |
1061 | ctx->xout->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_VID_MASK); |
1062 | } | |
ec7ceaed EJ |
1063 | vlan_mirrored = !vlans || bitmap_is_set(vlans, vlan); |
1064 | free(vlans); | |
9583bc14 | 1065 | |
ec7ceaed | 1066 | if (!vlan_mirrored) { |
9583bc14 EJ |
1067 | mirrors = zero_rightmost_1bit(mirrors); |
1068 | continue; | |
1069 | } | |
1070 | ||
ec7ceaed EJ |
1071 | mirrors &= ~dup_mirrors; |
1072 | ctx->xout->mirrors |= dup_mirrors; | |
1073 | if (out) { | |
46c88433 EJ |
1074 | struct xbundle *out_xbundle = xbundle_lookup(out); |
1075 | if (out_xbundle) { | |
1076 | output_normal(ctx, out_xbundle, vlan); | |
1077 | } | |
ec7ceaed | 1078 | } else if (vlan != out_vlan |
9583bc14 | 1079 | && !eth_addr_is_reserved(orig_flow->dl_dst)) { |
46c88433 | 1080 | struct xbundle *xbundle; |
9583bc14 | 1081 | |
46c88433 EJ |
1082 | LIST_FOR_EACH (xbundle, list_node, &xbridge->xbundles) { |
1083 | if (xbundle_includes_vlan(xbundle, out_vlan) | |
1084 | && !xbundle_mirror_out(xbridge, xbundle)) { | |
1085 | output_normal(ctx, xbundle, out_vlan); | |
9583bc14 EJ |
1086 | } |
1087 | } | |
1088 | } | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | /* Given 'vid', the VID obtained from the 802.1Q header that was received as | |
46c88433 | 1093 | * part of a packet (specify 0 if there was no 802.1Q header), and 'in_xbundle', |
9583bc14 EJ |
1094 | * the bundle on which the packet was received, returns the VLAN to which the |
1095 | * packet belongs. | |
1096 | * | |
1097 | * Both 'vid' and the return value are in the range 0...4095. */ | |
1098 | static uint16_t | |
46c88433 | 1099 | input_vid_to_vlan(const struct xbundle *in_xbundle, uint16_t vid) |
9583bc14 | 1100 | { |
46c88433 | 1101 | switch (in_xbundle->vlan_mode) { |
9583bc14 | 1102 | case PORT_VLAN_ACCESS: |
46c88433 | 1103 | return in_xbundle->vlan; |
9583bc14 EJ |
1104 | break; |
1105 | ||
1106 | case PORT_VLAN_TRUNK: | |
1107 | return vid; | |
1108 | ||
1109 | case PORT_VLAN_NATIVE_UNTAGGED: | |
1110 | case PORT_VLAN_NATIVE_TAGGED: | |
46c88433 | 1111 | return vid ? vid : in_xbundle->vlan; |
9583bc14 EJ |
1112 | |
1113 | default: | |
428b2edd | 1114 | OVS_NOT_REACHED(); |
9583bc14 EJ |
1115 | } |
1116 | } | |
1117 | ||
46c88433 | 1118 | /* Checks whether a packet with the given 'vid' may ingress on 'in_xbundle'. |
9583bc14 EJ |
1119 | * If so, returns true. Otherwise, returns false and, if 'warn' is true, logs |
1120 | * a warning. | |
1121 | * | |
1122 | * 'vid' should be the VID obtained from the 802.1Q header that was received as | |
1123 | * part of a packet (specify 0 if there was no 802.1Q header), in the range | |
1124 | * 0...4095. */ | |
1125 | static bool | |
46c88433 | 1126 | input_vid_is_valid(uint16_t vid, struct xbundle *in_xbundle, bool warn) |
9583bc14 EJ |
1127 | { |
1128 | /* Allow any VID on the OFPP_NONE port. */ | |
46c88433 | 1129 | if (in_xbundle == &ofpp_none_bundle) { |
9583bc14 EJ |
1130 | return true; |
1131 | } | |
1132 | ||
46c88433 | 1133 | switch (in_xbundle->vlan_mode) { |
9583bc14 EJ |
1134 | case PORT_VLAN_ACCESS: |
1135 | if (vid) { | |
1136 | if (warn) { | |
1137 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
46c88433 | 1138 | VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" tagged " |
9583bc14 | 1139 | "packet received on port %s configured as VLAN " |
46c88433 EJ |
1140 | "%"PRIu16" access port", vid, in_xbundle->name, |
1141 | in_xbundle->vlan); | |
9583bc14 EJ |
1142 | } |
1143 | return false; | |
1144 | } | |
1145 | return true; | |
1146 | ||
1147 | case PORT_VLAN_NATIVE_UNTAGGED: | |
1148 | case PORT_VLAN_NATIVE_TAGGED: | |
1149 | if (!vid) { | |
1150 | /* Port must always carry its native VLAN. */ | |
1151 | return true; | |
1152 | } | |
1153 | /* Fall through. */ | |
1154 | case PORT_VLAN_TRUNK: | |
46c88433 | 1155 | if (!xbundle_includes_vlan(in_xbundle, vid)) { |
9583bc14 EJ |
1156 | if (warn) { |
1157 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
46c88433 | 1158 | VLOG_WARN_RL(&rl, "dropping VLAN %"PRIu16" packet " |
9583bc14 | 1159 | "received on port %s not configured for trunking " |
46c88433 | 1160 | "VLAN %"PRIu16, vid, in_xbundle->name, vid); |
9583bc14 EJ |
1161 | } |
1162 | return false; | |
1163 | } | |
1164 | return true; | |
1165 | ||
1166 | default: | |
428b2edd | 1167 | OVS_NOT_REACHED(); |
9583bc14 EJ |
1168 | } |
1169 | ||
1170 | } | |
1171 | ||
1172 | /* Given 'vlan', the VLAN that a packet belongs to, and | |
46c88433 | 1173 | * 'out_xbundle', a bundle on which the packet is to be output, returns the VID |
9583bc14 EJ |
1174 | * that should be included in the 802.1Q header. (If the return value is 0, |
1175 | * then the 802.1Q header should only be included in the packet if there is a | |
1176 | * nonzero PCP.) | |
1177 | * | |
1178 | * Both 'vlan' and the return value are in the range 0...4095. */ | |
1179 | static uint16_t | |
46c88433 | 1180 | output_vlan_to_vid(const struct xbundle *out_xbundle, uint16_t vlan) |
9583bc14 | 1181 | { |
46c88433 | 1182 | switch (out_xbundle->vlan_mode) { |
9583bc14 EJ |
1183 | case PORT_VLAN_ACCESS: |
1184 | return 0; | |
1185 | ||
1186 | case PORT_VLAN_TRUNK: | |
1187 | case PORT_VLAN_NATIVE_TAGGED: | |
1188 | return vlan; | |
1189 | ||
1190 | case PORT_VLAN_NATIVE_UNTAGGED: | |
46c88433 | 1191 | return vlan == out_xbundle->vlan ? 0 : vlan; |
9583bc14 EJ |
1192 | |
1193 | default: | |
428b2edd | 1194 | OVS_NOT_REACHED(); |
9583bc14 EJ |
1195 | } |
1196 | } | |
1197 | ||
1198 | static void | |
46c88433 | 1199 | output_normal(struct xlate_ctx *ctx, const struct xbundle *out_xbundle, |
9583bc14 EJ |
1200 | uint16_t vlan) |
1201 | { | |
33bf9176 | 1202 | ovs_be16 *flow_tci = &ctx->xin->flow.vlan_tci; |
9583bc14 EJ |
1203 | uint16_t vid; |
1204 | ovs_be16 tci, old_tci; | |
46c88433 | 1205 | struct xport *xport; |
9583bc14 | 1206 | |
46c88433 EJ |
1207 | vid = output_vlan_to_vid(out_xbundle, vlan); |
1208 | if (list_is_empty(&out_xbundle->xports)) { | |
1209 | /* Partially configured bundle with no slaves. Drop the packet. */ | |
1210 | return; | |
1211 | } else if (!out_xbundle->bond) { | |
adcf00ba | 1212 | ctx->xout->use_recirc = false; |
46c88433 EJ |
1213 | xport = CONTAINER_OF(list_front(&out_xbundle->xports), struct xport, |
1214 | bundle_node); | |
9583bc14 | 1215 | } else { |
46c88433 | 1216 | struct ofport_dpif *ofport; |
adcf00ba | 1217 | struct xlate_recirc *xr = &ctx->xout->recirc; |
54ecb5a2 | 1218 | struct flow_wildcards *wc = &ctx->xout->wc; |
adcf00ba AZ |
1219 | |
1220 | if (ctx->xbridge->enable_recirc) { | |
1221 | ctx->xout->use_recirc = bond_may_recirc( | |
62ac1f20 | 1222 | out_xbundle->bond, &xr->recirc_id, &xr->hash_basis); |
adcf00ba AZ |
1223 | |
1224 | if (ctx->xout->use_recirc) { | |
1225 | /* Only TCP mode uses recirculation. */ | |
347bf289 | 1226 | xr->hash_alg = OVS_HASH_ALG_L4; |
adcf00ba | 1227 | bond_update_post_recirc_rules(out_xbundle->bond, false); |
54ecb5a2 AZ |
1228 | |
1229 | /* Recirculation does not require unmasking hash fields. */ | |
1230 | wc = NULL; | |
adcf00ba AZ |
1231 | } |
1232 | } | |
46c88433 | 1233 | |
54ecb5a2 AZ |
1234 | ofport = bond_choose_output_slave(out_xbundle->bond, |
1235 | &ctx->xin->flow, wc, vid); | |
5e6af486 | 1236 | xport = xport_lookup(ofport); |
46c88433 EJ |
1237 | |
1238 | if (!xport) { | |
9583bc14 EJ |
1239 | /* No slaves enabled, so drop packet. */ |
1240 | return; | |
1241 | } | |
d6fc5f57 | 1242 | |
b256dc52 JS |
1243 | /* If ctx->xout->use_recirc is set, the main thread will handle stats |
1244 | * accounting for this bond. */ | |
1245 | if (!ctx->xout->use_recirc) { | |
1246 | if (ctx->xin->resubmit_stats) { | |
1247 | bond_account(out_xbundle->bond, &ctx->xin->flow, vid, | |
1248 | ctx->xin->resubmit_stats->n_bytes); | |
1249 | } | |
1250 | if (ctx->xin->xcache) { | |
1251 | struct xc_entry *entry; | |
1252 | struct flow *flow; | |
1253 | ||
1254 | flow = &ctx->xin->flow; | |
1255 | entry = xlate_cache_add_entry(ctx->xin->xcache, XC_BOND); | |
1256 | entry->u.bond.bond = bond_ref(out_xbundle->bond); | |
1257 | entry->u.bond.flow = xmemdup(flow, sizeof *flow); | |
1258 | entry->u.bond.vid = vid; | |
1259 | } | |
d6fc5f57 | 1260 | } |
9583bc14 EJ |
1261 | } |
1262 | ||
33bf9176 | 1263 | old_tci = *flow_tci; |
9583bc14 | 1264 | tci = htons(vid); |
46c88433 | 1265 | if (tci || out_xbundle->use_priority_tags) { |
33bf9176 | 1266 | tci |= *flow_tci & htons(VLAN_PCP_MASK); |
9583bc14 EJ |
1267 | if (tci) { |
1268 | tci |= htons(VLAN_CFI); | |
1269 | } | |
1270 | } | |
33bf9176 | 1271 | *flow_tci = tci; |
9583bc14 | 1272 | |
46c88433 | 1273 | compose_output_action(ctx, xport->ofp_port); |
33bf9176 | 1274 | *flow_tci = old_tci; |
9583bc14 EJ |
1275 | } |
1276 | ||
1277 | /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after | |
1278 | * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to | |
1279 | * indicate this; newer upstream kernels use gratuitous ARP requests. */ | |
1280 | static bool | |
1281 | is_gratuitous_arp(const struct flow *flow, struct flow_wildcards *wc) | |
1282 | { | |
1283 | if (flow->dl_type != htons(ETH_TYPE_ARP)) { | |
1284 | return false; | |
1285 | } | |
1286 | ||
1287 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
1288 | if (!eth_addr_is_broadcast(flow->dl_dst)) { | |
1289 | return false; | |
1290 | } | |
1291 | ||
1292 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); | |
1293 | if (flow->nw_proto == ARP_OP_REPLY) { | |
1294 | return true; | |
1295 | } else if (flow->nw_proto == ARP_OP_REQUEST) { | |
1296 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); | |
1297 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); | |
1298 | ||
1299 | return flow->nw_src == flow->nw_dst; | |
1300 | } else { | |
1301 | return false; | |
1302 | } | |
1303 | } | |
1304 | ||
ee047520 BP |
1305 | /* Checks whether a MAC learning update is necessary for MAC learning table |
1306 | * 'ml' given that a packet matching 'flow' was received on 'in_xbundle' in | |
1307 | * 'vlan'. | |
1308 | * | |
1309 | * Most packets processed through the MAC learning table do not actually | |
1310 | * change it in any way. This function requires only a read lock on the MAC | |
1311 | * learning table, so it is much cheaper in this common case. | |
1312 | * | |
1313 | * Keep the code here synchronized with that in update_learning_table__() | |
1314 | * below. */ | |
1315 | static bool | |
1316 | is_mac_learning_update_needed(const struct mac_learning *ml, | |
1317 | const struct flow *flow, | |
1318 | struct flow_wildcards *wc, | |
1319 | int vlan, struct xbundle *in_xbundle) | |
d6fc5f57 | 1320 | OVS_REQ_RDLOCK(ml->rwlock) |
9583bc14 EJ |
1321 | { |
1322 | struct mac_entry *mac; | |
1323 | ||
ee047520 BP |
1324 | if (!mac_learning_may_learn(ml, flow->dl_src, vlan)) { |
1325 | return false; | |
1326 | } | |
1327 | ||
1328 | mac = mac_learning_lookup(ml, flow->dl_src, vlan); | |
1329 | if (!mac || mac_entry_age(ml, mac)) { | |
1330 | return true; | |
9583bc14 EJ |
1331 | } |
1332 | ||
ee047520 BP |
1333 | if (is_gratuitous_arp(flow, wc)) { |
1334 | /* We don't want to learn from gratuitous ARP packets that are | |
1335 | * reflected back over bond slaves so we lock the learning table. */ | |
1336 | if (!in_xbundle->bond) { | |
1337 | return true; | |
1338 | } else if (mac_entry_is_grat_arp_locked(mac)) { | |
1339 | return false; | |
1340 | } | |
1341 | } | |
1342 | ||
1343 | return mac->port.p != in_xbundle->ofbundle; | |
1344 | } | |
1345 | ||
1346 | ||
1347 | /* Updates MAC learning table 'ml' given that a packet matching 'flow' was | |
1348 | * received on 'in_xbundle' in 'vlan'. | |
1349 | * | |
1350 | * This code repeats all the checks in is_mac_learning_update_needed() because | |
1351 | * the lock was released between there and here and thus the MAC learning state | |
1352 | * could have changed. | |
1353 | * | |
1354 | * Keep the code here synchronized with that in is_mac_learning_update_needed() | |
1355 | * above. */ | |
1356 | static void | |
1357 | update_learning_table__(const struct xbridge *xbridge, | |
1358 | const struct flow *flow, struct flow_wildcards *wc, | |
1359 | int vlan, struct xbundle *in_xbundle) | |
d6fc5f57 | 1360 | OVS_REQ_WRLOCK(xbridge->ml->rwlock) |
ee047520 BP |
1361 | { |
1362 | struct mac_entry *mac; | |
1363 | ||
46c88433 | 1364 | if (!mac_learning_may_learn(xbridge->ml, flow->dl_src, vlan)) { |
ee047520 | 1365 | return; |
9583bc14 EJ |
1366 | } |
1367 | ||
46c88433 | 1368 | mac = mac_learning_insert(xbridge->ml, flow->dl_src, vlan); |
9583bc14 EJ |
1369 | if (is_gratuitous_arp(flow, wc)) { |
1370 | /* We don't want to learn from gratuitous ARP packets that are | |
1371 | * reflected back over bond slaves so we lock the learning table. */ | |
46c88433 | 1372 | if (!in_xbundle->bond) { |
9583bc14 EJ |
1373 | mac_entry_set_grat_arp_lock(mac); |
1374 | } else if (mac_entry_is_grat_arp_locked(mac)) { | |
ee047520 | 1375 | return; |
9583bc14 EJ |
1376 | } |
1377 | } | |
1378 | ||
30618594 | 1379 | if (mac->port.p != in_xbundle->ofbundle) { |
9583bc14 EJ |
1380 | /* The log messages here could actually be useful in debugging, |
1381 | * so keep the rate limit relatively high. */ | |
1382 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300); | |
ee047520 | 1383 | |
9583bc14 EJ |
1384 | VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is " |
1385 | "on port %s in VLAN %d", | |
46c88433 EJ |
1386 | xbridge->name, ETH_ADDR_ARGS(flow->dl_src), |
1387 | in_xbundle->name, vlan); | |
9583bc14 | 1388 | |
46c88433 | 1389 | mac->port.p = in_xbundle->ofbundle; |
30618594 | 1390 | mac_learning_changed(xbridge->ml); |
9583bc14 | 1391 | } |
ee047520 BP |
1392 | } |
1393 | ||
1394 | static void | |
1395 | update_learning_table(const struct xbridge *xbridge, | |
1396 | const struct flow *flow, struct flow_wildcards *wc, | |
1397 | int vlan, struct xbundle *in_xbundle) | |
1398 | { | |
1399 | bool need_update; | |
1400 | ||
1401 | /* Don't learn the OFPP_NONE port. */ | |
1402 | if (in_xbundle == &ofpp_none_bundle) { | |
1403 | return; | |
1404 | } | |
1405 | ||
1406 | /* First try the common case: no change to MAC learning table. */ | |
1407 | ovs_rwlock_rdlock(&xbridge->ml->rwlock); | |
1408 | need_update = is_mac_learning_update_needed(xbridge->ml, flow, wc, vlan, | |
1409 | in_xbundle); | |
509c0149 | 1410 | ovs_rwlock_unlock(&xbridge->ml->rwlock); |
ee047520 BP |
1411 | |
1412 | if (need_update) { | |
1413 | /* Slow path: MAC learning table might need an update. */ | |
1414 | ovs_rwlock_wrlock(&xbridge->ml->rwlock); | |
1415 | update_learning_table__(xbridge, flow, wc, vlan, in_xbundle); | |
1416 | ovs_rwlock_unlock(&xbridge->ml->rwlock); | |
1417 | } | |
9583bc14 EJ |
1418 | } |
1419 | ||
46c88433 | 1420 | /* Determines whether packets in 'flow' within 'xbridge' should be forwarded or |
9583bc14 EJ |
1421 | * dropped. Returns true if they may be forwarded, false if they should be |
1422 | * dropped. | |
1423 | * | |
46c88433 | 1424 | * 'in_port' must be the xport that corresponds to flow->in_port. |
9583bc14 EJ |
1425 | * 'in_port' must be part of a bundle (e.g. in_port->bundle must be nonnull). |
1426 | * | |
1427 | * 'vlan' must be the VLAN that corresponds to flow->vlan_tci on 'in_port', as | |
1428 | * returned by input_vid_to_vlan(). It must be a valid VLAN for 'in_port', as | |
1429 | * checked by input_vid_is_valid(). | |
1430 | * | |
1431 | * May also add tags to '*tags', although the current implementation only does | |
1432 | * so in one special case. | |
1433 | */ | |
1434 | static bool | |
46c88433 | 1435 | is_admissible(struct xlate_ctx *ctx, struct xport *in_port, |
9583bc14 EJ |
1436 | uint16_t vlan) |
1437 | { | |
46c88433 EJ |
1438 | struct xbundle *in_xbundle = in_port->xbundle; |
1439 | const struct xbridge *xbridge = ctx->xbridge; | |
9583bc14 | 1440 | struct flow *flow = &ctx->xin->flow; |
9583bc14 EJ |
1441 | |
1442 | /* Drop frames for reserved multicast addresses | |
1443 | * only if forward_bpdu option is absent. */ | |
46c88433 | 1444 | if (!xbridge->forward_bpdu && eth_addr_is_reserved(flow->dl_dst)) { |
9583bc14 EJ |
1445 | xlate_report(ctx, "packet has reserved destination MAC, dropping"); |
1446 | return false; | |
1447 | } | |
1448 | ||
46c88433 | 1449 | if (in_xbundle->bond) { |
9583bc14 EJ |
1450 | struct mac_entry *mac; |
1451 | ||
46c88433 | 1452 | switch (bond_check_admissibility(in_xbundle->bond, in_port->ofport, |
4a1b8f30 | 1453 | flow->dl_dst)) { |
9583bc14 EJ |
1454 | case BV_ACCEPT: |
1455 | break; | |
1456 | ||
1457 | case BV_DROP: | |
1458 | xlate_report(ctx, "bonding refused admissibility, dropping"); | |
1459 | return false; | |
1460 | ||
1461 | case BV_DROP_IF_MOVED: | |
509c0149 | 1462 | ovs_rwlock_rdlock(&xbridge->ml->rwlock); |
30618594 | 1463 | mac = mac_learning_lookup(xbridge->ml, flow->dl_src, vlan); |
46c88433 | 1464 | if (mac && mac->port.p != in_xbundle->ofbundle && |
9583bc14 EJ |
1465 | (!is_gratuitous_arp(flow, &ctx->xout->wc) |
1466 | || mac_entry_is_grat_arp_locked(mac))) { | |
509c0149 | 1467 | ovs_rwlock_unlock(&xbridge->ml->rwlock); |
9583bc14 | 1468 | xlate_report(ctx, "SLB bond thinks this packet looped back, " |
d6fc5f57 | 1469 | "dropping"); |
9583bc14 EJ |
1470 | return false; |
1471 | } | |
509c0149 | 1472 | ovs_rwlock_unlock(&xbridge->ml->rwlock); |
9583bc14 EJ |
1473 | break; |
1474 | } | |
1475 | } | |
1476 | ||
1477 | return true; | |
1478 | } | |
1479 | ||
1480 | static void | |
1481 | xlate_normal(struct xlate_ctx *ctx) | |
1482 | { | |
33bf9176 BP |
1483 | struct flow_wildcards *wc = &ctx->xout->wc; |
1484 | struct flow *flow = &ctx->xin->flow; | |
46c88433 EJ |
1485 | struct xbundle *in_xbundle; |
1486 | struct xport *in_port; | |
9583bc14 | 1487 | struct mac_entry *mac; |
d6d5bbc9 | 1488 | void *mac_port; |
9583bc14 EJ |
1489 | uint16_t vlan; |
1490 | uint16_t vid; | |
1491 | ||
1492 | ctx->xout->has_normal = true; | |
1493 | ||
33bf9176 BP |
1494 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); |
1495 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
1dd35f8a | 1496 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
9583bc14 | 1497 | |
46c88433 EJ |
1498 | in_xbundle = lookup_input_bundle(ctx->xbridge, flow->in_port.ofp_port, |
1499 | ctx->xin->packet != NULL, &in_port); | |
1500 | if (!in_xbundle) { | |
9583bc14 EJ |
1501 | xlate_report(ctx, "no input bundle, dropping"); |
1502 | return; | |
1503 | } | |
1504 | ||
1505 | /* Drop malformed frames. */ | |
33bf9176 BP |
1506 | if (flow->dl_type == htons(ETH_TYPE_VLAN) && |
1507 | !(flow->vlan_tci & htons(VLAN_CFI))) { | |
9583bc14 EJ |
1508 | if (ctx->xin->packet != NULL) { |
1509 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
1510 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet with partial " | |
1511 | "VLAN tag received on port %s", | |
46c88433 | 1512 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 EJ |
1513 | } |
1514 | xlate_report(ctx, "partial VLAN tag, dropping"); | |
1515 | return; | |
1516 | } | |
1517 | ||
1518 | /* Drop frames on bundles reserved for mirroring. */ | |
46c88433 | 1519 | if (xbundle_mirror_out(ctx->xbridge, in_xbundle)) { |
9583bc14 EJ |
1520 | if (ctx->xin->packet != NULL) { |
1521 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
1522 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port " | |
1523 | "%s, which is reserved exclusively for mirroring", | |
46c88433 | 1524 | ctx->xbridge->name, in_xbundle->name); |
9583bc14 EJ |
1525 | } |
1526 | xlate_report(ctx, "input port is mirror output port, dropping"); | |
1527 | return; | |
1528 | } | |
1529 | ||
1530 | /* Check VLAN. */ | |
33bf9176 | 1531 | vid = vlan_tci_to_vid(flow->vlan_tci); |
46c88433 | 1532 | if (!input_vid_is_valid(vid, in_xbundle, ctx->xin->packet != NULL)) { |
9583bc14 EJ |
1533 | xlate_report(ctx, "disallowed VLAN VID for this input port, dropping"); |
1534 | return; | |
1535 | } | |
46c88433 | 1536 | vlan = input_vid_to_vlan(in_xbundle, vid); |
9583bc14 EJ |
1537 | |
1538 | /* Check other admissibility requirements. */ | |
1539 | if (in_port && !is_admissible(ctx, in_port, vlan)) { | |
1540 | return; | |
1541 | } | |
1542 | ||
1543 | /* Learn source MAC. */ | |
1544 | if (ctx->xin->may_learn) { | |
46c88433 | 1545 | update_learning_table(ctx->xbridge, flow, wc, vlan, in_xbundle); |
9583bc14 | 1546 | } |
b256dc52 JS |
1547 | if (ctx->xin->xcache) { |
1548 | struct xc_entry *entry; | |
1549 | ||
1550 | /* Save enough info to update mac learning table later. */ | |
1551 | entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NORMAL); | |
1552 | entry->u.normal.ofproto = ctx->xin->ofproto; | |
1553 | entry->u.normal.flow = xmemdup(flow, sizeof *flow); | |
1554 | entry->u.normal.vlan = vlan; | |
1555 | } | |
9583bc14 EJ |
1556 | |
1557 | /* Determine output bundle. */ | |
509c0149 | 1558 | ovs_rwlock_rdlock(&ctx->xbridge->ml->rwlock); |
30618594 | 1559 | mac = mac_learning_lookup(ctx->xbridge->ml, flow->dl_dst, vlan); |
d6d5bbc9 EJ |
1560 | mac_port = mac ? mac->port.p : NULL; |
1561 | ovs_rwlock_unlock(&ctx->xbridge->ml->rwlock); | |
1562 | ||
1563 | if (mac_port) { | |
1564 | struct xbundle *mac_xbundle = xbundle_lookup(mac_port); | |
46c88433 | 1565 | if (mac_xbundle && mac_xbundle != in_xbundle) { |
9583bc14 | 1566 | xlate_report(ctx, "forwarding to learned port"); |
46c88433 EJ |
1567 | output_normal(ctx, mac_xbundle, vlan); |
1568 | } else if (!mac_xbundle) { | |
1569 | xlate_report(ctx, "learned port is unknown, dropping"); | |
9583bc14 EJ |
1570 | } else { |
1571 | xlate_report(ctx, "learned port is input port, dropping"); | |
1572 | } | |
1573 | } else { | |
46c88433 | 1574 | struct xbundle *xbundle; |
9583bc14 EJ |
1575 | |
1576 | xlate_report(ctx, "no learned MAC for destination, flooding"); | |
46c88433 EJ |
1577 | LIST_FOR_EACH (xbundle, list_node, &ctx->xbridge->xbundles) { |
1578 | if (xbundle != in_xbundle | |
1579 | && xbundle_includes_vlan(xbundle, vlan) | |
1580 | && xbundle->floodable | |
1581 | && !xbundle_mirror_out(ctx->xbridge, xbundle)) { | |
1582 | output_normal(ctx, xbundle, vlan); | |
9583bc14 EJ |
1583 | } |
1584 | } | |
1585 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
1586 | } | |
1587 | } | |
1588 | ||
1589 | /* Compose SAMPLE action for sFlow or IPFIX. The given probability is | |
1590 | * the number of packets out of UINT32_MAX to sample. The given | |
1591 | * cookie is passed back in the callback for each sampled packet. | |
1592 | */ | |
1593 | static size_t | |
46c88433 | 1594 | compose_sample_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1595 | struct ofpbuf *odp_actions, |
1596 | const struct flow *flow, | |
1597 | const uint32_t probability, | |
1598 | const union user_action_cookie *cookie, | |
1599 | const size_t cookie_size) | |
1600 | { | |
1601 | size_t sample_offset, actions_offset; | |
89a8a7f0 | 1602 | odp_port_t odp_port; |
9583bc14 | 1603 | int cookie_offset; |
89a8a7f0 | 1604 | uint32_t pid; |
9583bc14 EJ |
1605 | |
1606 | sample_offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SAMPLE); | |
1607 | ||
1608 | nl_msg_put_u32(odp_actions, OVS_SAMPLE_ATTR_PROBABILITY, probability); | |
1609 | ||
1610 | actions_offset = nl_msg_start_nested(odp_actions, OVS_SAMPLE_ATTR_ACTIONS); | |
89a8a7f0 EJ |
1611 | |
1612 | odp_port = ofp_port_to_odp_port(xbridge, flow->in_port.ofp_port); | |
9a159f74 AW |
1613 | pid = dpif_port_get_pid(xbridge->dpif, odp_port, |
1614 | flow_hash_5tuple(flow, 0)); | |
1615 | cookie_offset = odp_put_userspace_action(pid, cookie, cookie_size, | |
1616 | odp_actions); | |
9583bc14 EJ |
1617 | |
1618 | nl_msg_end_nested(odp_actions, actions_offset); | |
1619 | nl_msg_end_nested(odp_actions, sample_offset); | |
1620 | return cookie_offset; | |
1621 | } | |
1622 | ||
1623 | static void | |
46c88433 EJ |
1624 | compose_sflow_cookie(const struct xbridge *xbridge, ovs_be16 vlan_tci, |
1625 | odp_port_t odp_port, unsigned int n_outputs, | |
1626 | union user_action_cookie *cookie) | |
9583bc14 EJ |
1627 | { |
1628 | int ifindex; | |
1629 | ||
1630 | cookie->type = USER_ACTION_COOKIE_SFLOW; | |
1631 | cookie->sflow.vlan_tci = vlan_tci; | |
1632 | ||
1633 | /* See http://www.sflow.org/sflow_version_5.txt (search for "Input/output | |
1634 | * port information") for the interpretation of cookie->output. */ | |
1635 | switch (n_outputs) { | |
1636 | case 0: | |
1637 | /* 0x40000000 | 256 means "packet dropped for unknown reason". */ | |
1638 | cookie->sflow.output = 0x40000000 | 256; | |
1639 | break; | |
1640 | ||
1641 | case 1: | |
46c88433 | 1642 | ifindex = dpif_sflow_odp_port_to_ifindex(xbridge->sflow, odp_port); |
9583bc14 EJ |
1643 | if (ifindex) { |
1644 | cookie->sflow.output = ifindex; | |
1645 | break; | |
1646 | } | |
1647 | /* Fall through. */ | |
1648 | default: | |
1649 | /* 0x80000000 means "multiple output ports. */ | |
1650 | cookie->sflow.output = 0x80000000 | n_outputs; | |
1651 | break; | |
1652 | } | |
1653 | } | |
1654 | ||
1655 | /* Compose SAMPLE action for sFlow bridge sampling. */ | |
1656 | static size_t | |
46c88433 | 1657 | compose_sflow_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1658 | struct ofpbuf *odp_actions, |
1659 | const struct flow *flow, | |
4e022ec0 | 1660 | odp_port_t odp_port) |
9583bc14 EJ |
1661 | { |
1662 | uint32_t probability; | |
1663 | union user_action_cookie cookie; | |
1664 | ||
46c88433 | 1665 | if (!xbridge->sflow || flow->in_port.ofp_port == OFPP_NONE) { |
9583bc14 EJ |
1666 | return 0; |
1667 | } | |
1668 | ||
46c88433 EJ |
1669 | probability = dpif_sflow_get_probability(xbridge->sflow); |
1670 | compose_sflow_cookie(xbridge, htons(0), odp_port, | |
4e022ec0 | 1671 | odp_port == ODPP_NONE ? 0 : 1, &cookie); |
9583bc14 | 1672 | |
46c88433 | 1673 | return compose_sample_action(xbridge, odp_actions, flow, probability, |
9583bc14 EJ |
1674 | &cookie, sizeof cookie.sflow); |
1675 | } | |
1676 | ||
1677 | static void | |
1678 | compose_flow_sample_cookie(uint16_t probability, uint32_t collector_set_id, | |
1679 | uint32_t obs_domain_id, uint32_t obs_point_id, | |
1680 | union user_action_cookie *cookie) | |
1681 | { | |
1682 | cookie->type = USER_ACTION_COOKIE_FLOW_SAMPLE; | |
1683 | cookie->flow_sample.probability = probability; | |
1684 | cookie->flow_sample.collector_set_id = collector_set_id; | |
1685 | cookie->flow_sample.obs_domain_id = obs_domain_id; | |
1686 | cookie->flow_sample.obs_point_id = obs_point_id; | |
1687 | } | |
1688 | ||
1689 | static void | |
1690 | compose_ipfix_cookie(union user_action_cookie *cookie) | |
1691 | { | |
1692 | cookie->type = USER_ACTION_COOKIE_IPFIX; | |
1693 | } | |
1694 | ||
1695 | /* Compose SAMPLE action for IPFIX bridge sampling. */ | |
1696 | static void | |
46c88433 | 1697 | compose_ipfix_action(const struct xbridge *xbridge, |
9583bc14 EJ |
1698 | struct ofpbuf *odp_actions, |
1699 | const struct flow *flow) | |
1700 | { | |
1701 | uint32_t probability; | |
1702 | union user_action_cookie cookie; | |
1703 | ||
46c88433 | 1704 | if (!xbridge->ipfix || flow->in_port.ofp_port == OFPP_NONE) { |
9583bc14 EJ |
1705 | return; |
1706 | } | |
1707 | ||
46c88433 | 1708 | probability = dpif_ipfix_get_bridge_exporter_probability(xbridge->ipfix); |
9583bc14 EJ |
1709 | compose_ipfix_cookie(&cookie); |
1710 | ||
46c88433 | 1711 | compose_sample_action(xbridge, odp_actions, flow, probability, |
9583bc14 EJ |
1712 | &cookie, sizeof cookie.ipfix); |
1713 | } | |
1714 | ||
1715 | /* SAMPLE action for sFlow must be first action in any given list of | |
1716 | * actions. At this point we do not have all information required to | |
1717 | * build it. So try to build sample action as complete as possible. */ | |
1718 | static void | |
1719 | add_sflow_action(struct xlate_ctx *ctx) | |
1720 | { | |
46c88433 | 1721 | ctx->user_cookie_offset = compose_sflow_action(ctx->xbridge, |
9583bc14 | 1722 | &ctx->xout->odp_actions, |
4e022ec0 | 1723 | &ctx->xin->flow, ODPP_NONE); |
9583bc14 EJ |
1724 | ctx->sflow_odp_port = 0; |
1725 | ctx->sflow_n_outputs = 0; | |
1726 | } | |
1727 | ||
1728 | /* SAMPLE action for IPFIX must be 1st or 2nd action in any given list | |
1729 | * of actions, eventually after the SAMPLE action for sFlow. */ | |
1730 | static void | |
1731 | add_ipfix_action(struct xlate_ctx *ctx) | |
1732 | { | |
46c88433 | 1733 | compose_ipfix_action(ctx->xbridge, &ctx->xout->odp_actions, |
9583bc14 EJ |
1734 | &ctx->xin->flow); |
1735 | } | |
1736 | ||
1737 | /* Fix SAMPLE action according to data collected while composing ODP actions. | |
1738 | * We need to fix SAMPLE actions OVS_SAMPLE_ATTR_ACTIONS attribute, i.e. nested | |
1739 | * USERSPACE action's user-cookie which is required for sflow. */ | |
1740 | static void | |
1741 | fix_sflow_action(struct xlate_ctx *ctx) | |
1742 | { | |
1743 | const struct flow *base = &ctx->base_flow; | |
1744 | union user_action_cookie *cookie; | |
1745 | ||
1746 | if (!ctx->user_cookie_offset) { | |
1747 | return; | |
1748 | } | |
1749 | ||
1750 | cookie = ofpbuf_at(&ctx->xout->odp_actions, ctx->user_cookie_offset, | |
1751 | sizeof cookie->sflow); | |
1752 | ovs_assert(cookie->type == USER_ACTION_COOKIE_SFLOW); | |
1753 | ||
46c88433 | 1754 | compose_sflow_cookie(ctx->xbridge, base->vlan_tci, |
9583bc14 EJ |
1755 | ctx->sflow_odp_port, ctx->sflow_n_outputs, cookie); |
1756 | } | |
1757 | ||
db7d4e46 | 1758 | static enum slow_path_reason |
642dc74d | 1759 | process_special(struct xlate_ctx *ctx, const struct flow *flow, |
46c88433 | 1760 | const struct xport *xport, const struct ofpbuf *packet) |
db7d4e46 | 1761 | { |
642dc74d | 1762 | struct flow_wildcards *wc = &ctx->xout->wc; |
46c88433 | 1763 | const struct xbridge *xbridge = ctx->xbridge; |
642dc74d | 1764 | |
46c88433 | 1765 | if (!xport) { |
db7d4e46 | 1766 | return 0; |
46c88433 | 1767 | } else if (xport->cfm && cfm_should_process_flow(xport->cfm, flow, wc)) { |
db7d4e46 | 1768 | if (packet) { |
46c88433 | 1769 | cfm_process_heartbeat(xport->cfm, packet); |
db7d4e46 JP |
1770 | } |
1771 | return SLOW_CFM; | |
fab52e16 | 1772 | } else if (xport->bfd && bfd_should_process_flow(xport->bfd, flow, wc)) { |
db7d4e46 | 1773 | if (packet) { |
46c88433 | 1774 | bfd_process_packet(xport->bfd, flow, packet); |
60d02c72 AW |
1775 | /* If POLL received, immediately sends FINAL back. */ |
1776 | if (bfd_should_send_packet(xport->bfd)) { | |
1777 | if (xport->peer) { | |
1778 | ofproto_dpif_monitor_port_send_soon(xport->ofport); | |
1779 | } else { | |
1780 | ofproto_dpif_monitor_port_send_soon_safe(xport->ofport); | |
1781 | } | |
1782 | } | |
db7d4e46 JP |
1783 | } |
1784 | return SLOW_BFD; | |
46c88433 | 1785 | } else if (xport->xbundle && xport->xbundle->lacp |
db7d4e46 JP |
1786 | && flow->dl_type == htons(ETH_TYPE_LACP)) { |
1787 | if (packet) { | |
46c88433 | 1788 | lacp_process_packet(xport->xbundle->lacp, xport->ofport, packet); |
db7d4e46 JP |
1789 | } |
1790 | return SLOW_LACP; | |
9d189a50 | 1791 | } else if (xbridge->stp && stp_should_process_flow(flow, wc)) { |
db7d4e46 | 1792 | if (packet) { |
9d189a50 | 1793 | stp_process_packet(xport, packet); |
db7d4e46 JP |
1794 | } |
1795 | return SLOW_STP; | |
1796 | } else { | |
1797 | return 0; | |
1798 | } | |
1799 | } | |
1800 | ||
9583bc14 | 1801 | static void |
4e022ec0 | 1802 | compose_output_action__(struct xlate_ctx *ctx, ofp_port_t ofp_port, |
9583bc14 EJ |
1803 | bool check_stp) |
1804 | { | |
46c88433 | 1805 | const struct xport *xport = get_ofp_port(ctx->xbridge, ofp_port); |
1dd35f8a | 1806 | struct flow_wildcards *wc = &ctx->xout->wc; |
33bf9176 | 1807 | struct flow *flow = &ctx->xin->flow; |
9583bc14 | 1808 | ovs_be16 flow_vlan_tci; |
1362e248 | 1809 | uint32_t flow_pkt_mark; |
9583bc14 | 1810 | uint8_t flow_nw_tos; |
4e022ec0 | 1811 | odp_port_t out_port, odp_port; |
ca077186 | 1812 | uint8_t dscp; |
9583bc14 EJ |
1813 | |
1814 | /* If 'struct flow' gets additional metadata, we'll need to zero it out | |
1815 | * before traversing a patch port. */ | |
419681da | 1816 | BUILD_ASSERT_DECL(FLOW_WC_SEQ == 26); |
9583bc14 | 1817 | |
46c88433 | 1818 | if (!xport) { |
9583bc14 EJ |
1819 | xlate_report(ctx, "Nonexistent output port"); |
1820 | return; | |
46c88433 | 1821 | } else if (xport->config & OFPUTIL_PC_NO_FWD) { |
9583bc14 EJ |
1822 | xlate_report(ctx, "OFPPC_NO_FWD set, skipping output"); |
1823 | return; | |
0d1cee12 | 1824 | } else if (check_stp) { |
bbbca389 | 1825 | if (is_stp(&ctx->base_flow)) { |
0d1cee12 K |
1826 | if (!xport_stp_listen_state(xport)) { |
1827 | xlate_report(ctx, "STP not in listening state, " | |
1828 | "skipping bpdu output"); | |
1829 | return; | |
1830 | } | |
1831 | } else if (!xport_stp_forward_state(xport)) { | |
1832 | xlate_report(ctx, "STP not in forwarding state, " | |
1833 | "skipping output"); | |
1834 | return; | |
1835 | } | |
9583bc14 EJ |
1836 | } |
1837 | ||
46c88433 EJ |
1838 | if (mbridge_has_mirrors(ctx->xbridge->mbridge) && xport->xbundle) { |
1839 | ctx->xout->mirrors |= xbundle_mirror_dst(xport->xbundle->xbridge, | |
1840 | xport->xbundle); | |
cdf5d3a5 EJ |
1841 | } |
1842 | ||
46c88433 EJ |
1843 | if (xport->peer) { |
1844 | const struct xport *peer = xport->peer; | |
9583bc14 | 1845 | struct flow old_flow = ctx->xin->flow; |
9583bc14 | 1846 | enum slow_path_reason special; |
9583bc14 | 1847 | |
46c88433 EJ |
1848 | ctx->xbridge = peer->xbridge; |
1849 | flow->in_port.ofp_port = peer->ofp_port; | |
33bf9176 BP |
1850 | flow->metadata = htonll(0); |
1851 | memset(&flow->tunnel, 0, sizeof flow->tunnel); | |
1852 | memset(flow->regs, 0, sizeof flow->regs); | |
9583bc14 | 1853 | |
642dc74d | 1854 | special = process_special(ctx, &ctx->xin->flow, peer, |
9583bc14 EJ |
1855 | ctx->xin->packet); |
1856 | if (special) { | |
04594cd5 | 1857 | ctx->xout->slow |= special; |
ddd3c975 | 1858 | } else if (may_receive(peer, ctx)) { |
9d189a50 | 1859 | if (xport_stp_forward_state(peer)) { |
6d328fa2 | 1860 | xlate_table_action(ctx, flow->in_port.ofp_port, 0, true, true); |
9583bc14 EJ |
1861 | } else { |
1862 | /* Forwarding is disabled by STP. Let OFPP_NORMAL and the | |
1863 | * learning action look at the packet, then drop it. */ | |
1864 | struct flow old_base_flow = ctx->base_flow; | |
1f317cb5 | 1865 | size_t old_size = ofpbuf_size(&ctx->xout->odp_actions); |
cdf5d3a5 | 1866 | mirror_mask_t old_mirrors = ctx->xout->mirrors; |
6d328fa2 | 1867 | xlate_table_action(ctx, flow->in_port.ofp_port, 0, true, true); |
cdf5d3a5 | 1868 | ctx->xout->mirrors = old_mirrors; |
9583bc14 | 1869 | ctx->base_flow = old_base_flow; |
1f317cb5 | 1870 | ofpbuf_set_size(&ctx->xout->odp_actions, old_size); |
9583bc14 EJ |
1871 | } |
1872 | } | |
1873 | ||
1874 | ctx->xin->flow = old_flow; | |
832554e3 | 1875 | ctx->xbridge = xport->xbridge; |
9583bc14 EJ |
1876 | |
1877 | if (ctx->xin->resubmit_stats) { | |
46c88433 EJ |
1878 | netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats); |
1879 | netdev_vport_inc_rx(peer->netdev, ctx->xin->resubmit_stats); | |
a1aeea86 AW |
1880 | if (peer->bfd) { |
1881 | bfd_account_rx(peer->bfd, ctx->xin->resubmit_stats); | |
1882 | } | |
9583bc14 | 1883 | } |
b256dc52 JS |
1884 | if (ctx->xin->xcache) { |
1885 | struct xc_entry *entry; | |
1886 | ||
1887 | entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NETDEV); | |
1888 | entry->u.dev.tx = netdev_ref(xport->netdev); | |
1889 | entry->u.dev.rx = netdev_ref(peer->netdev); | |
1890 | entry->u.dev.bfd = bfd_ref(peer->bfd); | |
1891 | } | |
9583bc14 EJ |
1892 | |
1893 | return; | |
1894 | } | |
1895 | ||
33bf9176 | 1896 | flow_vlan_tci = flow->vlan_tci; |
1362e248 | 1897 | flow_pkt_mark = flow->pkt_mark; |
33bf9176 | 1898 | flow_nw_tos = flow->nw_tos; |
9583bc14 | 1899 | |
55954f6e | 1900 | if (dscp_from_skb_priority(xport, flow->skb_priority, &dscp)) { |
1ac9326d | 1901 | wc->masks.nw_tos |= IP_DSCP_MASK; |
33bf9176 | 1902 | flow->nw_tos &= ~IP_DSCP_MASK; |
ca077186 | 1903 | flow->nw_tos |= dscp; |
9583bc14 EJ |
1904 | } |
1905 | ||
46c88433 | 1906 | if (xport->is_tunnel) { |
9583bc14 EJ |
1907 | /* Save tunnel metadata so that changes made due to |
1908 | * the Logical (tunnel) Port are not visible for any further | |
1909 | * matches, while explicit set actions on tunnel metadata are. | |
1910 | */ | |
33bf9176 | 1911 | struct flow_tnl flow_tnl = flow->tunnel; |
46c88433 | 1912 | odp_port = tnl_port_send(xport->ofport, flow, &ctx->xout->wc); |
4e022ec0 | 1913 | if (odp_port == ODPP_NONE) { |
9583bc14 EJ |
1914 | xlate_report(ctx, "Tunneling decided against output"); |
1915 | goto out; /* restore flow_nw_tos */ | |
1916 | } | |
33bf9176 | 1917 | if (flow->tunnel.ip_dst == ctx->orig_tunnel_ip_dst) { |
9583bc14 EJ |
1918 | xlate_report(ctx, "Not tunneling to our own address"); |
1919 | goto out; /* restore flow_nw_tos */ | |
1920 | } | |
1921 | if (ctx->xin->resubmit_stats) { | |
46c88433 | 1922 | netdev_vport_inc_tx(xport->netdev, ctx->xin->resubmit_stats); |
9583bc14 | 1923 | } |
b256dc52 JS |
1924 | if (ctx->xin->xcache) { |
1925 | struct xc_entry *entry; | |
1926 | ||
1927 | entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NETDEV); | |
1928 | entry->u.dev.tx = netdev_ref(xport->netdev); | |
1929 | } | |
9583bc14 | 1930 | out_port = odp_port; |
33bf9176 | 1931 | commit_odp_tunnel_action(flow, &ctx->base_flow, |
9583bc14 | 1932 | &ctx->xout->odp_actions); |
33bf9176 | 1933 | flow->tunnel = flow_tnl; /* Restore tunnel metadata */ |
9583bc14 | 1934 | } else { |
46c88433 | 1935 | odp_port = xport->odp_port; |
7614e5d0 | 1936 | out_port = odp_port; |
46c88433 | 1937 | if (ofproto_has_vlan_splinters(ctx->xbridge->ofproto)) { |
7614e5d0 JR |
1938 | ofp_port_t vlandev_port; |
1939 | ||
1dd35f8a | 1940 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
7614e5d0 JR |
1941 | vlandev_port = vsp_realdev_to_vlandev(ctx->xbridge->ofproto, |
1942 | ofp_port, flow->vlan_tci); | |
1943 | if (vlandev_port != ofp_port) { | |
1944 | out_port = ofp_port_to_odp_port(ctx->xbridge, vlandev_port); | |
1945 | flow->vlan_tci = htons(0); | |
1946 | } | |
9583bc14 | 1947 | } |
9583bc14 | 1948 | } |
9583bc14 | 1949 | |
4e022ec0 | 1950 | if (out_port != ODPP_NONE) { |
7fd91025 BP |
1951 | ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow, |
1952 | &ctx->xout->odp_actions, | |
8bfd0fda | 1953 | &ctx->xout->wc); |
adcf00ba AZ |
1954 | |
1955 | if (ctx->xout->use_recirc) { | |
347bf289 | 1956 | struct ovs_action_hash *act_hash; |
adcf00ba AZ |
1957 | struct xlate_recirc *xr = &ctx->xout->recirc; |
1958 | ||
347bf289 AZ |
1959 | /* Hash action. */ |
1960 | act_hash = nl_msg_put_unspec_uninit(&ctx->xout->odp_actions, | |
1961 | OVS_ACTION_ATTR_HASH, | |
1962 | sizeof *act_hash); | |
1963 | act_hash->hash_alg = xr->hash_alg; | |
62ac1f20 | 1964 | act_hash->hash_basis = xr->hash_basis; |
347bf289 AZ |
1965 | |
1966 | /* Recirc action. */ | |
1967 | nl_msg_put_u32(&ctx->xout->odp_actions, OVS_ACTION_ATTR_RECIRC, | |
1968 | xr->recirc_id); | |
adcf00ba AZ |
1969 | } else { |
1970 | nl_msg_put_odp_port(&ctx->xout->odp_actions, OVS_ACTION_ATTR_OUTPUT, | |
1971 | out_port); | |
1972 | } | |
9583bc14 | 1973 | |
6cbbf4fa EJ |
1974 | ctx->sflow_odp_port = odp_port; |
1975 | ctx->sflow_n_outputs++; | |
1976 | ctx->xout->nf_output_iface = ofp_port; | |
1977 | } | |
1978 | ||
1979 | out: | |
9583bc14 | 1980 | /* Restore flow */ |
33bf9176 | 1981 | flow->vlan_tci = flow_vlan_tci; |
1362e248 | 1982 | flow->pkt_mark = flow_pkt_mark; |
33bf9176 | 1983 | flow->nw_tos = flow_nw_tos; |
9583bc14 EJ |
1984 | } |
1985 | ||
1986 | static void | |
4e022ec0 | 1987 | compose_output_action(struct xlate_ctx *ctx, ofp_port_t ofp_port) |
9583bc14 EJ |
1988 | { |
1989 | compose_output_action__(ctx, ofp_port, true); | |
1990 | } | |
1991 | ||
bb61b33d BP |
1992 | static void |
1993 | xlate_recursively(struct xlate_ctx *ctx, struct rule_dpif *rule) | |
bb61b33d BP |
1994 | { |
1995 | struct rule_dpif *old_rule = ctx->rule; | |
dc723c44 | 1996 | const struct rule_actions *actions; |
bb61b33d BP |
1997 | |
1998 | if (ctx->xin->resubmit_stats) { | |
70742c7f | 1999 | rule_dpif_credit_stats(rule, ctx->xin->resubmit_stats); |
bb61b33d BP |
2000 | } |
2001 | ||
98b07853 | 2002 | ctx->resubmits++; |
bb61b33d BP |
2003 | ctx->recurse++; |
2004 | ctx->rule = rule; | |
6f00e29b BP |
2005 | actions = rule_dpif_get_actions(rule); |
2006 | do_xlate_actions(actions->ofpacts, actions->ofpacts_len, ctx); | |
bb61b33d BP |
2007 | ctx->rule = old_rule; |
2008 | ctx->recurse--; | |
bb61b33d BP |
2009 | } |
2010 | ||
bd3240ba SH |
2011 | static bool |
2012 | xlate_resubmit_resource_check(struct xlate_ctx *ctx) | |
9583bc14 | 2013 | { |
98b07853 BP |
2014 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); |
2015 | ||
adcf00ba | 2016 | if (ctx->recurse >= MAX_RESUBMIT_RECURSION + MAX_INTERNAL_RESUBMITS) { |
98b07853 BP |
2017 | VLOG_ERR_RL(&rl, "resubmit actions recursed over %d times", |
2018 | MAX_RESUBMIT_RECURSION); | |
adcf00ba | 2019 | } else if (ctx->resubmits >= MAX_RESUBMITS + MAX_INTERNAL_RESUBMITS) { |
98b07853 | 2020 | VLOG_ERR_RL(&rl, "over %d resubmit actions", MAX_RESUBMITS); |
1f317cb5 | 2021 | } else if (ofpbuf_size(&ctx->xout->odp_actions) > UINT16_MAX) { |
98b07853 | 2022 | VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of actions"); |
1f317cb5 | 2023 | } else if (ofpbuf_size(&ctx->stack) >= 65536) { |
98b07853 BP |
2024 | VLOG_ERR_RL(&rl, "resubmits yielded over 64 kB of stack"); |
2025 | } else { | |
bd3240ba SH |
2026 | return true; |
2027 | } | |
2028 | ||
2029 | return false; | |
2030 | } | |
2031 | ||
2032 | static void | |
6d328fa2 SH |
2033 | xlate_table_action(struct xlate_ctx *ctx, ofp_port_t in_port, uint8_t table_id, |
2034 | bool may_packet_in, bool honor_table_miss) | |
bd3240ba SH |
2035 | { |
2036 | if (xlate_resubmit_resource_check(ctx)) { | |
4e022ec0 | 2037 | ofp_port_t old_in_port = ctx->xin->flow.in_port.ofp_port; |
3f207910 | 2038 | bool skip_wildcards = ctx->xin->skip_wildcards; |
9583bc14 | 2039 | uint8_t old_table_id = ctx->table_id; |
3f207910 | 2040 | struct rule_dpif *rule; |
6d328fa2 SH |
2041 | enum rule_dpif_lookup_verdict verdict; |
2042 | enum ofputil_port_config config = 0; | |
9583bc14 EJ |
2043 | |
2044 | ctx->table_id = table_id; | |
2045 | ||
bb61b33d BP |
2046 | /* Look up a flow with 'in_port' as the input port. Then restore the |
2047 | * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will | |
2048 | * have surprising behavior). */ | |
4e022ec0 | 2049 | ctx->xin->flow.in_port.ofp_port = in_port; |
6d328fa2 SH |
2050 | verdict = rule_dpif_lookup_from_table(ctx->xbridge->ofproto, |
2051 | &ctx->xin->flow, | |
2052 | !skip_wildcards | |
2053 | ? &ctx->xout->wc : NULL, | |
2054 | honor_table_miss, | |
83709dfa JR |
2055 | &ctx->table_id, &rule, |
2056 | ctx->xin->xcache != NULL); | |
4e022ec0 | 2057 | ctx->xin->flow.in_port.ofp_port = old_in_port; |
9583bc14 | 2058 | |
ad3efdcb EJ |
2059 | if (ctx->xin->resubmit_hook) { |
2060 | ctx->xin->resubmit_hook(ctx->xin, rule, ctx->recurse); | |
2061 | } | |
2062 | ||
6d328fa2 SH |
2063 | switch (verdict) { |
2064 | case RULE_DPIF_LOOKUP_VERDICT_MATCH: | |
2065 | goto match; | |
2066 | case RULE_DPIF_LOOKUP_VERDICT_CONTROLLER: | |
2067 | if (may_packet_in) { | |
2068 | struct xport *xport; | |
2069 | ||
2070 | xport = get_ofp_port(ctx->xbridge, | |
2071 | ctx->xin->flow.in_port.ofp_port); | |
2072 | config = xport ? xport->config : 0; | |
2073 | break; | |
2074 | } | |
2075 | /* Fall through to drop */ | |
2076 | case RULE_DPIF_LOOKUP_VERDICT_DROP: | |
2077 | config = OFPUTIL_PC_NO_PACKET_IN; | |
2078 | break; | |
6b83a3c5 SH |
2079 | case RULE_DPIF_LOOKUP_VERDICT_DEFAULT: |
2080 | if (!ofproto_dpif_wants_packet_in_on_miss(ctx->xbridge->ofproto)) { | |
2081 | config = OFPUTIL_PC_NO_PACKET_IN; | |
2082 | } | |
2083 | break; | |
6d328fa2 SH |
2084 | default: |
2085 | OVS_NOT_REACHED(); | |
a2143702 | 2086 | } |
6d328fa2 SH |
2087 | |
2088 | choose_miss_rule(config, ctx->xbridge->miss_rule, | |
83709dfa JR |
2089 | ctx->xbridge->no_packet_in_rule, &rule, |
2090 | ctx->xin->xcache != NULL); | |
6d328fa2 SH |
2091 | |
2092 | match: | |
a2143702 | 2093 | if (rule) { |
83709dfa JR |
2094 | /* Fill in the cache entry here instead of xlate_recursively |
2095 | * to make the reference counting more explicit. We take a | |
2096 | * reference in the lookups above if we are going to cache the | |
2097 | * rule. */ | |
2098 | if (ctx->xin->xcache) { | |
2099 | struct xc_entry *entry; | |
2100 | ||
2101 | entry = xlate_cache_add_entry(ctx->xin->xcache, XC_RULE); | |
2102 | entry->u.rule = rule; | |
2103 | } | |
bb61b33d | 2104 | xlate_recursively(ctx, rule); |
ad3efdcb EJ |
2105 | } |
2106 | ||
9583bc14 | 2107 | ctx->table_id = old_table_id; |
98b07853 | 2108 | return; |
9583bc14 | 2109 | } |
98b07853 BP |
2110 | |
2111 | ctx->exit = true; | |
9583bc14 EJ |
2112 | } |
2113 | ||
f4fb341b SH |
2114 | static void |
2115 | xlate_group_bucket(struct xlate_ctx *ctx, const struct ofputil_bucket *bucket) | |
2116 | { | |
2117 | uint64_t action_list_stub[1024 / 8]; | |
2118 | struct ofpbuf action_list, action_set; | |
2119 | ||
2120 | ofpbuf_use_const(&action_set, bucket->ofpacts, bucket->ofpacts_len); | |
2121 | ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub); | |
2122 | ||
2123 | ofpacts_execute_action_set(&action_list, &action_set); | |
2124 | ctx->recurse++; | |
1f317cb5 | 2125 | do_xlate_actions(ofpbuf_data(&action_list), ofpbuf_size(&action_list), ctx); |
f4fb341b SH |
2126 | ctx->recurse--; |
2127 | ||
2128 | ofpbuf_uninit(&action_set); | |
2129 | ofpbuf_uninit(&action_list); | |
2130 | } | |
2131 | ||
2132 | static void | |
2133 | xlate_all_group(struct xlate_ctx *ctx, struct group_dpif *group) | |
2134 | { | |
2135 | const struct ofputil_bucket *bucket; | |
2136 | const struct list *buckets; | |
2137 | struct flow old_flow = ctx->xin->flow; | |
2138 | ||
2139 | group_dpif_get_buckets(group, &buckets); | |
2140 | ||
2141 | LIST_FOR_EACH (bucket, list_node, buckets) { | |
2142 | xlate_group_bucket(ctx, bucket); | |
2143 | /* Roll back flow to previous state. | |
2144 | * This is equivalent to cloning the packet for each bucket. | |
2145 | * | |
2146 | * As a side effect any subsequently applied actions will | |
2147 | * also effectively be applied to a clone of the packet taken | |
2148 | * just before applying the all or indirect group. */ | |
2149 | ctx->xin->flow = old_flow; | |
2150 | } | |
2151 | } | |
2152 | ||
dd8cd4b4 SH |
2153 | static void |
2154 | xlate_ff_group(struct xlate_ctx *ctx, struct group_dpif *group) | |
2155 | { | |
2156 | const struct ofputil_bucket *bucket; | |
2157 | ||
2158 | bucket = group_first_live_bucket(ctx, group, 0); | |
2159 | if (bucket) { | |
2160 | xlate_group_bucket(ctx, bucket); | |
2161 | } | |
2162 | } | |
2163 | ||
fe7e5749 SH |
2164 | static void |
2165 | xlate_select_group(struct xlate_ctx *ctx, struct group_dpif *group) | |
2166 | { | |
2167 | struct flow_wildcards *wc = &ctx->xout->wc; | |
2168 | const struct ofputil_bucket *bucket; | |
2169 | uint32_t basis; | |
2170 | ||
7e36ac42 | 2171 | basis = hash_mac(ctx->xin->flow.dl_dst, 0, 0); |
fe7e5749 SH |
2172 | bucket = group_best_live_bucket(ctx, group, basis); |
2173 | if (bucket) { | |
2174 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
2175 | xlate_group_bucket(ctx, bucket); | |
2176 | } | |
2177 | } | |
2178 | ||
f4fb341b SH |
2179 | static void |
2180 | xlate_group_action__(struct xlate_ctx *ctx, struct group_dpif *group) | |
2181 | { | |
5a070238 BP |
2182 | ctx->in_group = true; |
2183 | ||
f4fb341b SH |
2184 | switch (group_dpif_get_type(group)) { |
2185 | case OFPGT11_ALL: | |
2186 | case OFPGT11_INDIRECT: | |
2187 | xlate_all_group(ctx, group); | |
2188 | break; | |
2189 | case OFPGT11_SELECT: | |
fe7e5749 | 2190 | xlate_select_group(ctx, group); |
f4fb341b | 2191 | break; |
dd8cd4b4 SH |
2192 | case OFPGT11_FF: |
2193 | xlate_ff_group(ctx, group); | |
2194 | break; | |
f4fb341b | 2195 | default: |
428b2edd | 2196 | OVS_NOT_REACHED(); |
f4fb341b SH |
2197 | } |
2198 | group_dpif_release(group); | |
5a070238 BP |
2199 | |
2200 | ctx->in_group = false; | |
2201 | } | |
2202 | ||
2203 | static bool | |
2204 | xlate_group_resource_check(struct xlate_ctx *ctx) | |
2205 | { | |
2206 | if (!xlate_resubmit_resource_check(ctx)) { | |
2207 | return false; | |
2208 | } else if (ctx->in_group) { | |
2209 | /* Prevent nested translation of OpenFlow groups. | |
2210 | * | |
2211 | * OpenFlow allows this restriction. We enforce this restriction only | |
2212 | * because, with the current architecture, we would otherwise have to | |
2213 | * take a possibly recursive read lock on the ofgroup rwlock, which is | |
2214 | * unsafe given that POSIX allows taking a read lock to block if there | |
2215 | * is a thread blocked on taking the write lock. Other solutions | |
2216 | * without this restriction are also possible, but seem unwarranted | |
2217 | * given the current limited use of groups. */ | |
2218 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); | |
2219 | ||
2220 | VLOG_ERR_RL(&rl, "cannot recursively translate OpenFlow group"); | |
2221 | return false; | |
2222 | } else { | |
2223 | return true; | |
2224 | } | |
f4fb341b SH |
2225 | } |
2226 | ||
2227 | static bool | |
2228 | xlate_group_action(struct xlate_ctx *ctx, uint32_t group_id) | |
2229 | { | |
5a070238 | 2230 | if (xlate_group_resource_check(ctx)) { |
f4fb341b SH |
2231 | struct group_dpif *group; |
2232 | bool got_group; | |
2233 | ||
2234 | got_group = group_dpif_lookup(ctx->xbridge->ofproto, group_id, &group); | |
2235 | if (got_group) { | |
2236 | xlate_group_action__(ctx, group); | |
2237 | } else { | |
2238 | return true; | |
2239 | } | |
2240 | } | |
2241 | ||
2242 | return false; | |
2243 | } | |
2244 | ||
9583bc14 EJ |
2245 | static void |
2246 | xlate_ofpact_resubmit(struct xlate_ctx *ctx, | |
2247 | const struct ofpact_resubmit *resubmit) | |
2248 | { | |
4e022ec0 | 2249 | ofp_port_t in_port; |
9583bc14 | 2250 | uint8_t table_id; |
adcf00ba AZ |
2251 | bool may_packet_in = false; |
2252 | bool honor_table_miss = false; | |
2253 | ||
2254 | if (ctx->rule && rule_dpif_is_internal(ctx->rule)) { | |
2255 | /* Still allow missed packets to be sent to the controller | |
2256 | * if resubmitting from an internal table. */ | |
2257 | may_packet_in = true; | |
2258 | honor_table_miss = true; | |
2259 | } | |
9583bc14 EJ |
2260 | |
2261 | in_port = resubmit->in_port; | |
2262 | if (in_port == OFPP_IN_PORT) { | |
4e022ec0 | 2263 | in_port = ctx->xin->flow.in_port.ofp_port; |
9583bc14 EJ |
2264 | } |
2265 | ||
2266 | table_id = resubmit->table_id; | |
2267 | if (table_id == 255) { | |
2268 | table_id = ctx->table_id; | |
2269 | } | |
2270 | ||
adcf00ba AZ |
2271 | xlate_table_action(ctx, in_port, table_id, may_packet_in, |
2272 | honor_table_miss); | |
9583bc14 EJ |
2273 | } |
2274 | ||
2275 | static void | |
2276 | flood_packets(struct xlate_ctx *ctx, bool all) | |
2277 | { | |
46c88433 | 2278 | const struct xport *xport; |
9583bc14 | 2279 | |
46c88433 EJ |
2280 | HMAP_FOR_EACH (xport, ofp_node, &ctx->xbridge->xports) { |
2281 | if (xport->ofp_port == ctx->xin->flow.in_port.ofp_port) { | |
9583bc14 EJ |
2282 | continue; |
2283 | } | |
2284 | ||
2285 | if (all) { | |
46c88433 EJ |
2286 | compose_output_action__(ctx, xport->ofp_port, false); |
2287 | } else if (!(xport->config & OFPUTIL_PC_NO_FLOOD)) { | |
2288 | compose_output_action(ctx, xport->ofp_port); | |
9583bc14 EJ |
2289 | } |
2290 | } | |
2291 | ||
2292 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
2293 | } | |
2294 | ||
2295 | static void | |
2296 | execute_controller_action(struct xlate_ctx *ctx, int len, | |
2297 | enum ofp_packet_in_reason reason, | |
2298 | uint16_t controller_id) | |
2299 | { | |
0fb7792a | 2300 | struct ofproto_packet_in *pin; |
9583bc14 | 2301 | struct ofpbuf *packet; |
758c456d | 2302 | struct pkt_metadata md = PKT_METADATA_INITIALIZER(0); |
9583bc14 | 2303 | |
04594cd5 | 2304 | ctx->xout->slow |= SLOW_CONTROLLER; |
9583bc14 EJ |
2305 | if (!ctx->xin->packet) { |
2306 | return; | |
2307 | } | |
2308 | ||
2309 | packet = ofpbuf_clone(ctx->xin->packet); | |
2310 | ||
7fd91025 BP |
2311 | ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow, |
2312 | &ctx->xout->odp_actions, | |
8bfd0fda | 2313 | &ctx->xout->wc); |
9583bc14 | 2314 | |
1f317cb5 PS |
2315 | odp_execute_actions(NULL, packet, false, &md, |
2316 | ofpbuf_data(&ctx->xout->odp_actions), | |
2317 | ofpbuf_size(&ctx->xout->odp_actions), NULL); | |
9583bc14 | 2318 | |
ada3a58d | 2319 | pin = xmalloc(sizeof *pin); |
1f317cb5 | 2320 | pin->up.packet_len = ofpbuf_size(packet); |
0fb7792a BP |
2321 | pin->up.packet = ofpbuf_steal_data(packet); |
2322 | pin->up.reason = reason; | |
0fb7792a | 2323 | pin->up.table_id = ctx->table_id; |
d4fa4e79 BP |
2324 | pin->up.cookie = (ctx->rule |
2325 | ? rule_dpif_get_flow_cookie(ctx->rule) | |
2326 | : OVS_BE64_MAX); | |
0fb7792a | 2327 | |
0fb7792a | 2328 | flow_get_metadata(&ctx->xin->flow, &pin->up.fmd); |
9583bc14 | 2329 | |
f11c7538 | 2330 | pin->controller_id = controller_id; |
d38a3c7b | 2331 | pin->send_len = len; |
32260212 SH |
2332 | /* If a rule is a table-miss rule then this is |
2333 | * a table-miss handled by a table-miss rule. | |
2334 | * | |
2335 | * Else, if rule is internal and has a controller action, | |
2336 | * the later being implied by the rule being processed here, | |
2337 | * then this is a table-miss handled without a table-miss rule. | |
2338 | * | |
2339 | * Otherwise this is not a table-miss. */ | |
2340 | pin->miss_type = OFPROTO_PACKET_IN_NO_MISS; | |
2341 | if (ctx->rule) { | |
2342 | if (rule_dpif_is_table_miss(ctx->rule)) { | |
2343 | pin->miss_type = OFPROTO_PACKET_IN_MISS_FLOW; | |
2344 | } else if (rule_dpif_is_internal(ctx->rule)) { | |
2345 | pin->miss_type = OFPROTO_PACKET_IN_MISS_WITHOUT_FLOW; | |
2346 | } | |
2347 | } | |
ada3a58d | 2348 | ofproto_dpif_send_packet_in(ctx->xbridge->ofproto, pin); |
9583bc14 EJ |
2349 | ofpbuf_delete(packet); |
2350 | } | |
2351 | ||
8bfd0fda BP |
2352 | static void |
2353 | compose_mpls_push_action(struct xlate_ctx *ctx, struct ofpact_push_mpls *mpls) | |
9583bc14 | 2354 | { |
33bf9176 BP |
2355 | struct flow_wildcards *wc = &ctx->xout->wc; |
2356 | struct flow *flow = &ctx->xin->flow; | |
8bfd0fda | 2357 | int n; |
33bf9176 | 2358 | |
8bfd0fda | 2359 | ovs_assert(eth_type_mpls(mpls->ethertype)); |
b0a17866 | 2360 | |
8bfd0fda BP |
2361 | n = flow_count_mpls_labels(flow, wc); |
2362 | if (!n) { | |
8bfd0fda BP |
2363 | ctx->xout->slow |= commit_odp_actions(flow, &ctx->base_flow, |
2364 | &ctx->xout->odp_actions, | |
2365 | &ctx->xout->wc); | |
2366 | } else if (n >= FLOW_MAX_MPLS_LABELS) { | |
2367 | if (ctx->xin->packet != NULL) { | |
2368 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
2369 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet on which an " | |
2370 | "MPLS push action can't be performed as it would " | |
2371 | "have more MPLS LSEs than the %d supported.", | |
2372 | ctx->xbridge->name, FLOW_MAX_MPLS_LABELS); | |
9583bc14 | 2373 | } |
8bfd0fda BP |
2374 | ctx->exit = true; |
2375 | return; | |
2376 | } else if (n >= ctx->xbridge->max_mpls_depth) { | |
2377 | COVERAGE_INC(xlate_actions_mpls_overflow); | |
2378 | ctx->xout->slow |= SLOW_ACTION; | |
9583bc14 | 2379 | } |
b0a17866 | 2380 | |
8bfd0fda | 2381 | flow_push_mpls(flow, n, mpls->ethertype, wc); |
9583bc14 EJ |
2382 | } |
2383 | ||
8bfd0fda | 2384 | static void |
9cfef3d0 | 2385 | compose_mpls_pop_action(struct xlate_ctx *ctx, ovs_be16 eth_type) |
9583bc14 | 2386 | { |
33bf9176 | 2387 | struct flow_wildcards *wc = &ctx->xout->wc; |
8bfd0fda BP |
2388 | struct flow *flow = &ctx->xin->flow; |
2389 | int n = flow_count_mpls_labels(flow, wc); | |
33bf9176 | 2390 | |
8bfd0fda BP |
2391 | if (!flow_pop_mpls(flow, n, eth_type, wc) && n >= FLOW_MAX_MPLS_LABELS) { |
2392 | if (ctx->xin->packet != NULL) { | |
2393 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
2394 | VLOG_WARN_RL(&rl, "bridge %s: dropping packet on which an " | |
2395 | "MPLS pop action can't be performed as it has " | |
2396 | "more MPLS LSEs than the %d supported.", | |
2397 | ctx->xbridge->name, FLOW_MAX_MPLS_LABELS); | |
2398 | } | |
2399 | ctx->exit = true; | |
2400 | ofpbuf_clear(&ctx->xout->odp_actions); | |
9583bc14 EJ |
2401 | } |
2402 | } | |
2403 | ||
2404 | static bool | |
2405 | compose_dec_ttl(struct xlate_ctx *ctx, struct ofpact_cnt_ids *ids) | |
2406 | { | |
33bf9176 BP |
2407 | struct flow *flow = &ctx->xin->flow; |
2408 | ||
2409 | if (!is_ip_any(flow)) { | |
9583bc14 EJ |
2410 | return false; |
2411 | } | |
2412 | ||
1dd35f8a | 2413 | ctx->xout->wc.masks.nw_ttl = 0xff; |
33bf9176 BP |
2414 | if (flow->nw_ttl > 1) { |
2415 | flow->nw_ttl--; | |
9583bc14 EJ |
2416 | return false; |
2417 | } else { | |
2418 | size_t i; | |
2419 | ||
2420 | for (i = 0; i < ids->n_controllers; i++) { | |
2421 | execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, | |
2422 | ids->cnt_ids[i]); | |
2423 | } | |
2424 | ||
2425 | /* Stop processing for current table. */ | |
2426 | return true; | |
2427 | } | |
2428 | } | |
2429 | ||
8bfd0fda | 2430 | static void |
097d4939 JR |
2431 | compose_set_mpls_label_action(struct xlate_ctx *ctx, ovs_be32 label) |
2432 | { | |
8bfd0fda BP |
2433 | if (eth_type_mpls(ctx->xin->flow.dl_type)) { |
2434 | ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_LABEL_MASK); | |
2435 | set_mpls_lse_label(&ctx->xin->flow.mpls_lse[0], label); | |
097d4939 | 2436 | } |
097d4939 JR |
2437 | } |
2438 | ||
8bfd0fda | 2439 | static void |
097d4939 JR |
2440 | compose_set_mpls_tc_action(struct xlate_ctx *ctx, uint8_t tc) |
2441 | { | |
8bfd0fda BP |
2442 | if (eth_type_mpls(ctx->xin->flow.dl_type)) { |
2443 | ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_TC_MASK); | |
2444 | set_mpls_lse_tc(&ctx->xin->flow.mpls_lse[0], tc); | |
097d4939 | 2445 | } |
097d4939 JR |
2446 | } |
2447 | ||
8bfd0fda | 2448 | static void |
9cfef3d0 | 2449 | compose_set_mpls_ttl_action(struct xlate_ctx *ctx, uint8_t ttl) |
9583bc14 | 2450 | { |
8bfd0fda BP |
2451 | if (eth_type_mpls(ctx->xin->flow.dl_type)) { |
2452 | ctx->xout->wc.masks.mpls_lse[0] |= htonl(MPLS_TTL_MASK); | |
2453 | set_mpls_lse_ttl(&ctx->xin->flow.mpls_lse[0], ttl); | |
b0a17866 | 2454 | } |
9583bc14 EJ |
2455 | } |
2456 | ||
2457 | static bool | |
9cfef3d0 | 2458 | compose_dec_mpls_ttl_action(struct xlate_ctx *ctx) |
9583bc14 | 2459 | { |
33bf9176 | 2460 | struct flow *flow = &ctx->xin->flow; |
8bfd0fda | 2461 | uint8_t ttl = mpls_lse_to_ttl(flow->mpls_lse[0]); |
1dd35f8a JP |
2462 | struct flow_wildcards *wc = &ctx->xout->wc; |
2463 | ||
1dd35f8a | 2464 | memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); |
8bfd0fda BP |
2465 | if (eth_type_mpls(flow->dl_type)) { |
2466 | if (ttl > 1) { | |
2467 | ttl--; | |
2468 | set_mpls_lse_ttl(&flow->mpls_lse[0], ttl); | |
2469 | return false; | |
2470 | } else { | |
2471 | execute_controller_action(ctx, UINT16_MAX, OFPR_INVALID_TTL, 0); | |
9583bc14 | 2472 | |
8bfd0fda BP |
2473 | /* Stop processing for current table. */ |
2474 | return true; | |
2475 | } | |
9583bc14 | 2476 | } else { |
9583bc14 EJ |
2477 | return true; |
2478 | } | |
2479 | } | |
2480 | ||
2481 | static void | |
2482 | xlate_output_action(struct xlate_ctx *ctx, | |
4e022ec0 | 2483 | ofp_port_t port, uint16_t max_len, bool may_packet_in) |
9583bc14 | 2484 | { |
4e022ec0 | 2485 | ofp_port_t prev_nf_output_iface = ctx->xout->nf_output_iface; |
9583bc14 EJ |
2486 | |
2487 | ctx->xout->nf_output_iface = NF_OUT_DROP; | |
2488 | ||
2489 | switch (port) { | |
2490 | case OFPP_IN_PORT: | |
4e022ec0 | 2491 | compose_output_action(ctx, ctx->xin->flow.in_port.ofp_port); |
9583bc14 EJ |
2492 | break; |
2493 | case OFPP_TABLE: | |
4e022ec0 | 2494 | xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port, |
6d328fa2 | 2495 | 0, may_packet_in, true); |
9583bc14 EJ |
2496 | break; |
2497 | case OFPP_NORMAL: | |
2498 | xlate_normal(ctx); | |
2499 | break; | |
2500 | case OFPP_FLOOD: | |
2501 | flood_packets(ctx, false); | |
2502 | break; | |
2503 | case OFPP_ALL: | |
2504 | flood_packets(ctx, true); | |
2505 | break; | |
2506 | case OFPP_CONTROLLER: | |
2507 | execute_controller_action(ctx, max_len, OFPR_ACTION, 0); | |
2508 | break; | |
2509 | case OFPP_NONE: | |
2510 | break; | |
2511 | case OFPP_LOCAL: | |
2512 | default: | |
4e022ec0 | 2513 | if (port != ctx->xin->flow.in_port.ofp_port) { |
9583bc14 EJ |
2514 | compose_output_action(ctx, port); |
2515 | } else { | |
2516 | xlate_report(ctx, "skipping output to input port"); | |
2517 | } | |
2518 | break; | |
2519 | } | |
2520 | ||
2521 | if (prev_nf_output_iface == NF_OUT_FLOOD) { | |
2522 | ctx->xout->nf_output_iface = NF_OUT_FLOOD; | |
2523 | } else if (ctx->xout->nf_output_iface == NF_OUT_DROP) { | |
2524 | ctx->xout->nf_output_iface = prev_nf_output_iface; | |
2525 | } else if (prev_nf_output_iface != NF_OUT_DROP && | |
2526 | ctx->xout->nf_output_iface != NF_OUT_FLOOD) { | |
2527 | ctx->xout->nf_output_iface = NF_OUT_MULTI; | |
2528 | } | |
2529 | } | |
2530 | ||
2531 | static void | |
2532 | xlate_output_reg_action(struct xlate_ctx *ctx, | |
2533 | const struct ofpact_output_reg *or) | |
2534 | { | |
2535 | uint64_t port = mf_get_subfield(&or->src, &ctx->xin->flow); | |
2536 | if (port <= UINT16_MAX) { | |
2537 | union mf_subvalue value; | |
2538 | ||
2539 | memset(&value, 0xff, sizeof value); | |
2540 | mf_write_subfield_flow(&or->src, &value, &ctx->xout->wc.masks); | |
4e022ec0 AW |
2541 | xlate_output_action(ctx, u16_to_ofp(port), |
2542 | or->max_len, false); | |
9583bc14 EJ |
2543 | } |
2544 | } | |
2545 | ||
2546 | static void | |
2547 | xlate_enqueue_action(struct xlate_ctx *ctx, | |
2548 | const struct ofpact_enqueue *enqueue) | |
2549 | { | |
4e022ec0 | 2550 | ofp_port_t ofp_port = enqueue->port; |
9583bc14 EJ |
2551 | uint32_t queue_id = enqueue->queue; |
2552 | uint32_t flow_priority, priority; | |
2553 | int error; | |
2554 | ||
2555 | /* Translate queue to priority. */ | |
89a8a7f0 | 2556 | error = dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &priority); |
9583bc14 EJ |
2557 | if (error) { |
2558 | /* Fall back to ordinary output action. */ | |
2559 | xlate_output_action(ctx, enqueue->port, 0, false); | |
2560 | return; | |
2561 | } | |
2562 | ||
2563 | /* Check output port. */ | |
2564 | if (ofp_port == OFPP_IN_PORT) { | |
4e022ec0 AW |
2565 | ofp_port = ctx->xin->flow.in_port.ofp_port; |
2566 | } else if (ofp_port == ctx->xin->flow.in_port.ofp_port) { | |
9583bc14 EJ |
2567 | return; |
2568 | } | |
2569 | ||
2570 | /* Add datapath actions. */ | |
2571 | flow_priority = ctx->xin->flow.skb_priority; | |
2572 | ctx->xin->flow.skb_priority = priority; | |
2573 | compose_output_action(ctx, ofp_port); | |
2574 | ctx->xin->flow.skb_priority = flow_priority; | |
2575 | ||
2576 | /* Update NetFlow output port. */ | |
2577 | if (ctx->xout->nf_output_iface == NF_OUT_DROP) { | |
2578 | ctx->xout->nf_output_iface = ofp_port; | |
2579 | } else if (ctx->xout->nf_output_iface != NF_OUT_FLOOD) { | |
2580 | ctx->xout->nf_output_iface = NF_OUT_MULTI; | |
2581 | } | |
2582 | } | |
2583 | ||
2584 | static void | |
2585 | xlate_set_queue_action(struct xlate_ctx *ctx, uint32_t queue_id) | |
2586 | { | |
2587 | uint32_t skb_priority; | |
2588 | ||
89a8a7f0 | 2589 | if (!dpif_queue_to_priority(ctx->xbridge->dpif, queue_id, &skb_priority)) { |
9583bc14 EJ |
2590 | ctx->xin->flow.skb_priority = skb_priority; |
2591 | } else { | |
2592 | /* Couldn't translate queue to a priority. Nothing to do. A warning | |
2593 | * has already been logged. */ | |
2594 | } | |
2595 | } | |
2596 | ||
2597 | static bool | |
46c88433 | 2598 | slave_enabled_cb(ofp_port_t ofp_port, void *xbridge_) |
9583bc14 | 2599 | { |
46c88433 EJ |
2600 | const struct xbridge *xbridge = xbridge_; |
2601 | struct xport *port; | |
9583bc14 EJ |
2602 | |
2603 | switch (ofp_port) { | |
2604 | case OFPP_IN_PORT: | |
2605 | case OFPP_TABLE: | |
2606 | case OFPP_NORMAL: | |
2607 | case OFPP_FLOOD: | |
2608 | case OFPP_ALL: | |
2609 | case OFPP_NONE: | |
2610 | return true; | |
2611 | case OFPP_CONTROLLER: /* Not supported by the bundle action. */ | |
2612 | return false; | |
2613 | default: | |
46c88433 | 2614 | port = get_ofp_port(xbridge, ofp_port); |
9583bc14 EJ |
2615 | return port ? port->may_enable : false; |
2616 | } | |
2617 | } | |
2618 | ||
2619 | static void | |
2620 | xlate_bundle_action(struct xlate_ctx *ctx, | |
2621 | const struct ofpact_bundle *bundle) | |
2622 | { | |
4e022ec0 | 2623 | ofp_port_t port; |
9583bc14 EJ |
2624 | |
2625 | port = bundle_execute(bundle, &ctx->xin->flow, &ctx->xout->wc, | |
46c88433 EJ |
2626 | slave_enabled_cb, |
2627 | CONST_CAST(struct xbridge *, ctx->xbridge)); | |
9583bc14 | 2628 | if (bundle->dst.field) { |
f74e7df7 JP |
2629 | nxm_reg_load(&bundle->dst, ofp_to_u16(port), &ctx->xin->flow, |
2630 | &ctx->xout->wc); | |
9583bc14 EJ |
2631 | } else { |
2632 | xlate_output_action(ctx, port, 0, false); | |
2633 | } | |
2634 | } | |
2635 | ||
2636 | static void | |
2637 | xlate_learn_action(struct xlate_ctx *ctx, | |
2638 | const struct ofpact_learn *learn) | |
2639 | { | |
1b63b91e BP |
2640 | uint64_t ofpacts_stub[1024 / 8]; |
2641 | struct ofputil_flow_mod fm; | |
9583bc14 | 2642 | struct ofpbuf ofpacts; |
9583bc14 EJ |
2643 | |
2644 | ctx->xout->has_learn = true; | |
2645 | ||
2646 | learn_mask(learn, &ctx->xout->wc); | |
2647 | ||
2648 | if (!ctx->xin->may_learn) { | |
2649 | return; | |
2650 | } | |
2651 | ||
1b63b91e BP |
2652 | ofpbuf_use_stub(&ofpacts, ofpacts_stub, sizeof ofpacts_stub); |
2653 | learn_execute(learn, &ctx->xin->flow, &fm, &ofpacts); | |
2654 | ofproto_dpif_flow_mod(ctx->xbridge->ofproto, &fm); | |
2655 | ofpbuf_uninit(&ofpacts); | |
b256dc52 JS |
2656 | |
2657 | if (ctx->xin->xcache) { | |
2658 | struct xc_entry *entry; | |
2659 | ||
2660 | entry = xlate_cache_add_entry(ctx->xin->xcache, XC_LEARN); | |
2661 | entry->u.learn.ofproto = ctx->xin->ofproto; | |
83709dfa JR |
2662 | /* Lookup the learned rule, taking a reference on it. The reference |
2663 | * is released when this cache entry is deleted. */ | |
b256dc52 | 2664 | rule_dpif_lookup(ctx->xbridge->ofproto, &ctx->xin->flow, NULL, |
1a7c0cd7 | 2665 | &entry->u.learn.rule, true); |
b256dc52 JS |
2666 | } |
2667 | } | |
2668 | ||
2669 | static void | |
2670 | xlate_fin_timeout__(struct rule_dpif *rule, uint16_t tcp_flags, | |
2671 | uint16_t idle_timeout, uint16_t hard_timeout) | |
2672 | { | |
2673 | if (tcp_flags & (TCP_FIN | TCP_RST)) { | |
2674 | rule_dpif_reduce_timeouts(rule, idle_timeout, hard_timeout); | |
2675 | } | |
9583bc14 EJ |
2676 | } |
2677 | ||
9583bc14 EJ |
2678 | static void |
2679 | xlate_fin_timeout(struct xlate_ctx *ctx, | |
2680 | const struct ofpact_fin_timeout *oft) | |
2681 | { | |
b256dc52 JS |
2682 | if (ctx->rule) { |
2683 | xlate_fin_timeout__(ctx->rule, ctx->xin->tcp_flags, | |
2684 | oft->fin_idle_timeout, oft->fin_hard_timeout); | |
2685 | if (ctx->xin->xcache) { | |
2686 | struct xc_entry *entry; | |
2687 | ||
2688 | entry = xlate_cache_add_entry(ctx->xin->xcache, XC_FIN_TIMEOUT); | |
83709dfa JR |
2689 | /* XC_RULE already holds a reference on the rule, none is taken |
2690 | * here. */ | |
b256dc52 JS |
2691 | entry->u.fin.rule = ctx->rule; |
2692 | entry->u.fin.idle = oft->fin_idle_timeout; | |
2693 | entry->u.fin.hard = oft->fin_hard_timeout; | |
b256dc52 | 2694 | } |
9583bc14 EJ |
2695 | } |
2696 | } | |
2697 | ||
2698 | static void | |
2699 | xlate_sample_action(struct xlate_ctx *ctx, | |
2700 | const struct ofpact_sample *os) | |
2701 | { | |
2702 | union user_action_cookie cookie; | |
2703 | /* Scale the probability from 16-bit to 32-bit while representing | |
2704 | * the same percentage. */ | |
2705 | uint32_t probability = (os->probability << 16) | os->probability; | |
2706 | ||
4b97b70d BP |
2707 | if (!ctx->xbridge->variable_length_userdata) { |
2708 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); | |
2709 | ||
2710 | VLOG_ERR_RL(&rl, "ignoring NXAST_SAMPLE action because datapath " | |
2711 | "lacks support (needs Linux 3.10+ or kernel module from " | |
2712 | "OVS 1.11+)"); | |
2713 | return; | |
2714 | } | |
2715 | ||
7fd91025 BP |
2716 | ctx->xout->slow |= commit_odp_actions(&ctx->xin->flow, &ctx->base_flow, |
2717 | &ctx->xout->odp_actions, | |
8bfd0fda | 2718 | &ctx->xout->wc); |
9583bc14 EJ |
2719 | |
2720 | compose_flow_sample_cookie(os->probability, os->collector_set_id, | |
2721 | os->obs_domain_id, os->obs_point_id, &cookie); | |
46c88433 | 2722 | compose_sample_action(ctx->xbridge, &ctx->xout->odp_actions, &ctx->xin->flow, |
9583bc14 EJ |
2723 | probability, &cookie, sizeof cookie.flow_sample); |
2724 | } | |
2725 | ||
2726 | static bool | |
46c88433 | 2727 | may_receive(const struct xport *xport, struct xlate_ctx *ctx) |
9583bc14 | 2728 | { |
bbbca389 | 2729 | if (xport->config & (is_stp(&ctx->xin->flow) |
46c88433 EJ |
2730 | ? OFPUTIL_PC_NO_RECV_STP |
2731 | : OFPUTIL_PC_NO_RECV)) { | |
9583bc14 EJ |
2732 | return false; |
2733 | } | |
2734 | ||
2735 | /* Only drop packets here if both forwarding and learning are | |
2736 | * disabled. If just learning is enabled, we need to have | |
2737 | * OFPP_NORMAL and the learning action have a look at the packet | |
2738 | * before we can drop it. */ | |
9d189a50 | 2739 | if (!xport_stp_forward_state(xport) && !xport_stp_learn_state(xport)) { |
9583bc14 EJ |
2740 | return false; |
2741 | } | |
2742 | ||
2743 | return true; | |
2744 | } | |
2745 | ||
7fdb60a7 SH |
2746 | static void |
2747 | xlate_write_actions(struct xlate_ctx *ctx, const struct ofpact *a) | |
2748 | { | |
2749 | struct ofpact_nest *on = ofpact_get_WRITE_ACTIONS(a); | |
2750 | ofpbuf_put(&ctx->action_set, on->actions, ofpact_nest_get_action_len(on)); | |
2751 | ofpact_pad(&ctx->action_set); | |
2752 | } | |
2753 | ||
2754 | static void | |
2755 | xlate_action_set(struct xlate_ctx *ctx) | |
2756 | { | |
2757 | uint64_t action_list_stub[1024 / 64]; | |
2758 | struct ofpbuf action_list; | |
2759 | ||
2760 | ofpbuf_use_stub(&action_list, action_list_stub, sizeof action_list_stub); | |
2761 | ofpacts_execute_action_set(&action_list, &ctx->action_set); | |
1f317cb5 | 2762 | do_xlate_actions(ofpbuf_data(&action_list), ofpbuf_size(&action_list), ctx); |
7fdb60a7 SH |
2763 | ofpbuf_uninit(&action_list); |
2764 | } | |
2765 | ||
9583bc14 EJ |
2766 | static void |
2767 | do_xlate_actions(const struct ofpact *ofpacts, size_t ofpacts_len, | |
2768 | struct xlate_ctx *ctx) | |
2769 | { | |
33bf9176 BP |
2770 | struct flow_wildcards *wc = &ctx->xout->wc; |
2771 | struct flow *flow = &ctx->xin->flow; | |
9583bc14 EJ |
2772 | const struct ofpact *a; |
2773 | ||
f47ea021 JR |
2774 | /* dl_type already in the mask, not set below. */ |
2775 | ||
9583bc14 EJ |
2776 | OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) { |
2777 | struct ofpact_controller *controller; | |
2778 | const struct ofpact_metadata *metadata; | |
b2dd70be JR |
2779 | const struct ofpact_set_field *set_field; |
2780 | const struct mf_field *mf; | |
9583bc14 EJ |
2781 | |
2782 | if (ctx->exit) { | |
2783 | break; | |
2784 | } | |
2785 | ||
2786 | switch (a->type) { | |
2787 | case OFPACT_OUTPUT: | |
2788 | xlate_output_action(ctx, ofpact_get_OUTPUT(a)->port, | |
2789 | ofpact_get_OUTPUT(a)->max_len, true); | |
2790 | break; | |
2791 | ||
7395c052 | 2792 | case OFPACT_GROUP: |
f4fb341b SH |
2793 | if (xlate_group_action(ctx, ofpact_get_GROUP(a)->group_id)) { |
2794 | return; | |
2795 | } | |
7395c052 NZ |
2796 | break; |
2797 | ||
9583bc14 EJ |
2798 | case OFPACT_CONTROLLER: |
2799 | controller = ofpact_get_CONTROLLER(a); | |
2800 | execute_controller_action(ctx, controller->max_len, | |
2801 | controller->reason, | |
2802 | controller->controller_id); | |
2803 | break; | |
2804 | ||
2805 | case OFPACT_ENQUEUE: | |
2806 | xlate_enqueue_action(ctx, ofpact_get_ENQUEUE(a)); | |
2807 | break; | |
2808 | ||
2809 | case OFPACT_SET_VLAN_VID: | |
f74e7df7 | 2810 | wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); |
ca287d20 JR |
2811 | if (flow->vlan_tci & htons(VLAN_CFI) || |
2812 | ofpact_get_SET_VLAN_VID(a)->push_vlan_if_needed) { | |
2813 | flow->vlan_tci &= ~htons(VLAN_VID_MASK); | |
2814 | flow->vlan_tci |= (htons(ofpact_get_SET_VLAN_VID(a)->vlan_vid) | |
2815 | | htons(VLAN_CFI)); | |
2816 | } | |
9583bc14 EJ |
2817 | break; |
2818 | ||
2819 | case OFPACT_SET_VLAN_PCP: | |
f74e7df7 | 2820 | wc->masks.vlan_tci |= htons(VLAN_PCP_MASK | VLAN_CFI); |
ca287d20 JR |
2821 | if (flow->vlan_tci & htons(VLAN_CFI) || |
2822 | ofpact_get_SET_VLAN_PCP(a)->push_vlan_if_needed) { | |
2823 | flow->vlan_tci &= ~htons(VLAN_PCP_MASK); | |
2824 | flow->vlan_tci |= htons((ofpact_get_SET_VLAN_PCP(a)->vlan_pcp | |
2825 | << VLAN_PCP_SHIFT) | VLAN_CFI); | |
2826 | } | |
9583bc14 EJ |
2827 | break; |
2828 | ||
2829 | case OFPACT_STRIP_VLAN: | |
f74e7df7 | 2830 | memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci); |
33bf9176 | 2831 | flow->vlan_tci = htons(0); |
9583bc14 EJ |
2832 | break; |
2833 | ||
2834 | case OFPACT_PUSH_VLAN: | |
2835 | /* XXX 802.1AD(QinQ) */ | |
f74e7df7 | 2836 | memset(&wc->masks.vlan_tci, 0xff, sizeof wc->masks.vlan_tci); |
33bf9176 | 2837 | flow->vlan_tci = htons(VLAN_CFI); |
9583bc14 EJ |
2838 | break; |
2839 | ||
2840 | case OFPACT_SET_ETH_SRC: | |
f74e7df7 | 2841 | memset(&wc->masks.dl_src, 0xff, sizeof wc->masks.dl_src); |
33bf9176 | 2842 | memcpy(flow->dl_src, ofpact_get_SET_ETH_SRC(a)->mac, ETH_ADDR_LEN); |
9583bc14 EJ |
2843 | break; |
2844 | ||
2845 | case OFPACT_SET_ETH_DST: | |
f74e7df7 | 2846 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); |
33bf9176 | 2847 | memcpy(flow->dl_dst, ofpact_get_SET_ETH_DST(a)->mac, ETH_ADDR_LEN); |
9583bc14 EJ |
2848 | break; |
2849 | ||
2850 | case OFPACT_SET_IPV4_SRC: | |
33bf9176 | 2851 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
f47ea021 | 2852 | memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); |
33bf9176 | 2853 | flow->nw_src = ofpact_get_SET_IPV4_SRC(a)->ipv4; |
9583bc14 EJ |
2854 | } |
2855 | break; | |
2856 | ||
2857 | case OFPACT_SET_IPV4_DST: | |
33bf9176 | 2858 | if (flow->dl_type == htons(ETH_TYPE_IP)) { |
f47ea021 | 2859 | memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); |
33bf9176 | 2860 | flow->nw_dst = ofpact_get_SET_IPV4_DST(a)->ipv4; |
9583bc14 EJ |
2861 | } |
2862 | break; | |
2863 | ||
04f01c24 BP |
2864 | case OFPACT_SET_IP_DSCP: |
2865 | if (is_ip_any(flow)) { | |
f47ea021 | 2866 | wc->masks.nw_tos |= IP_DSCP_MASK; |
33bf9176 | 2867 | flow->nw_tos &= ~IP_DSCP_MASK; |
04f01c24 | 2868 | flow->nw_tos |= ofpact_get_SET_IP_DSCP(a)->dscp; |
9583bc14 EJ |
2869 | } |
2870 | break; | |
2871 | ||
ff14eb7a JR |
2872 | case OFPACT_SET_IP_ECN: |
2873 | if (is_ip_any(flow)) { | |
2874 | wc->masks.nw_tos |= IP_ECN_MASK; | |
2875 | flow->nw_tos &= ~IP_ECN_MASK; | |
2876 | flow->nw_tos |= ofpact_get_SET_IP_ECN(a)->ecn; | |
2877 | } | |
2878 | break; | |
2879 | ||
0c20dbe4 JR |
2880 | case OFPACT_SET_IP_TTL: |
2881 | if (is_ip_any(flow)) { | |
2882 | wc->masks.nw_ttl = 0xff; | |
2883 | flow->nw_ttl = ofpact_get_SET_IP_TTL(a)->ttl; | |
2884 | } | |
2885 | break; | |
2886 | ||
9583bc14 | 2887 | case OFPACT_SET_L4_SRC_PORT: |
33bf9176 | 2888 | if (is_ip_any(flow)) { |
f47ea021 JR |
2889 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
2890 | memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); | |
33bf9176 | 2891 | flow->tp_src = htons(ofpact_get_SET_L4_SRC_PORT(a)->port); |
9583bc14 EJ |
2892 | } |
2893 | break; | |
2894 | ||
2895 | case OFPACT_SET_L4_DST_PORT: | |
33bf9176 | 2896 | if (is_ip_any(flow)) { |
f47ea021 JR |
2897 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
2898 | memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); | |
33bf9176 | 2899 | flow->tp_dst = htons(ofpact_get_SET_L4_DST_PORT(a)->port); |
9583bc14 EJ |
2900 | } |
2901 | break; | |
2902 | ||
2903 | case OFPACT_RESUBMIT: | |
2904 | xlate_ofpact_resubmit(ctx, ofpact_get_RESUBMIT(a)); | |
2905 | break; | |
2906 | ||
2907 | case OFPACT_SET_TUNNEL: | |
33bf9176 | 2908 | flow->tunnel.tun_id = htonll(ofpact_get_SET_TUNNEL(a)->tun_id); |
9583bc14 EJ |
2909 | break; |
2910 | ||
2911 | case OFPACT_SET_QUEUE: | |
2912 | xlate_set_queue_action(ctx, ofpact_get_SET_QUEUE(a)->queue_id); | |
2913 | break; | |
2914 | ||
2915 | case OFPACT_POP_QUEUE: | |
33bf9176 | 2916 | flow->skb_priority = ctx->orig_skb_priority; |
9583bc14 EJ |
2917 | break; |
2918 | ||
2919 | case OFPACT_REG_MOVE: | |
33bf9176 | 2920 | nxm_execute_reg_move(ofpact_get_REG_MOVE(a), flow, wc); |
9583bc14 EJ |
2921 | break; |
2922 | ||
2923 | case OFPACT_REG_LOAD: | |
f47ea021 | 2924 | nxm_execute_reg_load(ofpact_get_REG_LOAD(a), flow, wc); |
9583bc14 EJ |
2925 | break; |
2926 | ||
b2dd70be JR |
2927 | case OFPACT_SET_FIELD: |
2928 | set_field = ofpact_get_SET_FIELD(a); | |
2929 | mf = set_field->field; | |
b2dd70be JR |
2930 | |
2931 | /* Set field action only ever overwrites packet's outermost | |
2932 | * applicable header fields. Do nothing if no header exists. */ | |
4479846e JR |
2933 | if (mf->id == MFF_VLAN_VID) { |
2934 | wc->masks.vlan_tci |= htons(VLAN_CFI); | |
2935 | if (!(flow->vlan_tci & htons(VLAN_CFI))) { | |
2936 | break; | |
2937 | } | |
2938 | } else if ((mf->id == MFF_MPLS_LABEL || mf->id == MFF_MPLS_TC) | |
2939 | /* 'dl_type' is already unwildcarded. */ | |
2940 | && !eth_type_mpls(flow->dl_type)) { | |
2941 | break; | |
b2dd70be | 2942 | } |
4479846e JR |
2943 | |
2944 | mf_mask_field_and_prereqs(mf, &wc->masks); | |
2945 | mf_set_flow_value(mf, &set_field->value, flow); | |
b2dd70be JR |
2946 | break; |
2947 | ||
9583bc14 | 2948 | case OFPACT_STACK_PUSH: |
33bf9176 BP |
2949 | nxm_execute_stack_push(ofpact_get_STACK_PUSH(a), flow, wc, |
2950 | &ctx->stack); | |
9583bc14 EJ |
2951 | break; |
2952 | ||
2953 | case OFPACT_STACK_POP: | |
f74e7df7 JP |
2954 | nxm_execute_stack_pop(ofpact_get_STACK_POP(a), flow, wc, |
2955 | &ctx->stack); | |
9583bc14 EJ |
2956 | break; |
2957 | ||
2958 | case OFPACT_PUSH_MPLS: | |
8bfd0fda | 2959 | compose_mpls_push_action(ctx, ofpact_get_PUSH_MPLS(a)); |
9583bc14 EJ |
2960 | break; |
2961 | ||
2962 | case OFPACT_POP_MPLS: | |
8bfd0fda | 2963 | compose_mpls_pop_action(ctx, ofpact_get_POP_MPLS(a)->ethertype); |
9583bc14 EJ |
2964 | break; |
2965 | ||
097d4939 | 2966 | case OFPACT_SET_MPLS_LABEL: |
8bfd0fda BP |
2967 | compose_set_mpls_label_action( |
2968 | ctx, ofpact_get_SET_MPLS_LABEL(a)->label); | |
2969 | break; | |
097d4939 JR |
2970 | |
2971 | case OFPACT_SET_MPLS_TC: | |
8bfd0fda | 2972 | compose_set_mpls_tc_action(ctx, ofpact_get_SET_MPLS_TC(a)->tc); |
097d4939 JR |
2973 | break; |
2974 | ||
9583bc14 | 2975 | case OFPACT_SET_MPLS_TTL: |
8bfd0fda | 2976 | compose_set_mpls_ttl_action(ctx, ofpact_get_SET_MPLS_TTL(a)->ttl); |
9583bc14 EJ |
2977 | break; |
2978 | ||
2979 | case OFPACT_DEC_MPLS_TTL: | |
9cfef3d0 | 2980 | if (compose_dec_mpls_ttl_action(ctx)) { |
ad3efdcb | 2981 | return; |
9583bc14 EJ |
2982 | } |
2983 | break; | |
2984 | ||
2985 | case OFPACT_DEC_TTL: | |
f74e7df7 | 2986 | wc->masks.nw_ttl = 0xff; |
9583bc14 | 2987 | if (compose_dec_ttl(ctx, ofpact_get_DEC_TTL(a))) { |
ad3efdcb | 2988 | return; |
9583bc14 EJ |
2989 | } |
2990 | break; | |
2991 | ||
2992 | case OFPACT_NOTE: | |
2993 | /* Nothing to do. */ | |
2994 | break; | |
2995 | ||
2996 | case OFPACT_MULTIPATH: | |
33bf9176 | 2997 | multipath_execute(ofpact_get_MULTIPATH(a), flow, wc); |
9583bc14 EJ |
2998 | break; |
2999 | ||
3000 | case OFPACT_BUNDLE: | |
9583bc14 EJ |
3001 | xlate_bundle_action(ctx, ofpact_get_BUNDLE(a)); |
3002 | break; | |
3003 | ||
3004 | case OFPACT_OUTPUT_REG: | |
3005 | xlate_output_reg_action(ctx, ofpact_get_OUTPUT_REG(a)); | |
3006 | break; | |
3007 | ||
3008 | case OFPACT_LEARN: | |
3009 | xlate_learn_action(ctx, ofpact_get_LEARN(a)); | |
3010 | break; | |
3011 | ||
3012 | case OFPACT_EXIT: | |
3013 | ctx->exit = true; | |
3014 | break; | |
3015 | ||
3016 | case OFPACT_FIN_TIMEOUT: | |
33bf9176 | 3017 | memset(&wc->masks.nw_proto, 0xff, sizeof wc->masks.nw_proto); |
9583bc14 EJ |
3018 | ctx->xout->has_fin_timeout = true; |
3019 | xlate_fin_timeout(ctx, ofpact_get_FIN_TIMEOUT(a)); | |
3020 | break; | |
3021 | ||
3022 | case OFPACT_CLEAR_ACTIONS: | |
7fdb60a7 SH |
3023 | ofpbuf_clear(&ctx->action_set); |
3024 | break; | |
3025 | ||
3026 | case OFPACT_WRITE_ACTIONS: | |
3027 | xlate_write_actions(ctx, a); | |
9583bc14 EJ |
3028 | break; |
3029 | ||
3030 | case OFPACT_WRITE_METADATA: | |
3031 | metadata = ofpact_get_WRITE_METADATA(a); | |
33bf9176 BP |
3032 | flow->metadata &= ~metadata->mask; |
3033 | flow->metadata |= metadata->metadata & metadata->mask; | |
9583bc14 EJ |
3034 | break; |
3035 | ||
638a19b0 JR |
3036 | case OFPACT_METER: |
3037 | /* Not implemented yet. */ | |
3038 | break; | |
3039 | ||
9583bc14 | 3040 | case OFPACT_GOTO_TABLE: { |
9583bc14 | 3041 | struct ofpact_goto_table *ogt = ofpact_get_GOTO_TABLE(a); |
9583bc14 EJ |
3042 | |
3043 | ovs_assert(ctx->table_id < ogt->table_id); | |
4468099e | 3044 | xlate_table_action(ctx, ctx->xin->flow.in_port.ofp_port, |
6d328fa2 | 3045 | ogt->table_id, true, true); |
9583bc14 EJ |
3046 | break; |
3047 | } | |
3048 | ||
3049 | case OFPACT_SAMPLE: | |
3050 | xlate_sample_action(ctx, ofpact_get_SAMPLE(a)); | |
3051 | break; | |
3052 | } | |
3053 | } | |
9583bc14 EJ |
3054 | } |
3055 | ||
3056 | void | |
3057 | xlate_in_init(struct xlate_in *xin, struct ofproto_dpif *ofproto, | |
3058 | const struct flow *flow, struct rule_dpif *rule, | |
a66733a8 | 3059 | uint16_t tcp_flags, const struct ofpbuf *packet) |
9583bc14 EJ |
3060 | { |
3061 | xin->ofproto = ofproto; | |
3062 | xin->flow = *flow; | |
3063 | xin->packet = packet; | |
3064 | xin->may_learn = packet != NULL; | |
3065 | xin->rule = rule; | |
b256dc52 | 3066 | xin->xcache = NULL; |
9583bc14 EJ |
3067 | xin->ofpacts = NULL; |
3068 | xin->ofpacts_len = 0; | |
3069 | xin->tcp_flags = tcp_flags; | |
3070 | xin->resubmit_hook = NULL; | |
3071 | xin->report_hook = NULL; | |
3072 | xin->resubmit_stats = NULL; | |
3f207910 | 3073 | xin->skip_wildcards = false; |
9583bc14 EJ |
3074 | } |
3075 | ||
3076 | void | |
3077 | xlate_out_uninit(struct xlate_out *xout) | |
3078 | { | |
3079 | if (xout) { | |
3080 | ofpbuf_uninit(&xout->odp_actions); | |
3081 | } | |
3082 | } | |
3083 | ||
3084 | /* Translates the 'ofpacts_len' bytes of "struct ofpact"s starting at 'ofpacts' | |
3085 | * into datapath actions, using 'ctx', and discards the datapath actions. */ | |
3086 | void | |
3087 | xlate_actions_for_side_effects(struct xlate_in *xin) | |
3088 | { | |
3089 | struct xlate_out xout; | |
3090 | ||
3091 | xlate_actions(xin, &xout); | |
3092 | xlate_out_uninit(&xout); | |
3093 | } | |
3094 | ||
3095 | static void | |
3096 | xlate_report(struct xlate_ctx *ctx, const char *s) | |
3097 | { | |
3098 | if (ctx->xin->report_hook) { | |
4d0acc70 | 3099 | ctx->xin->report_hook(ctx->xin, s, ctx->recurse); |
9583bc14 EJ |
3100 | } |
3101 | } | |
3102 | ||
3103 | void | |
3104 | xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src) | |
3105 | { | |
3106 | dst->wc = src->wc; | |
9583bc14 EJ |
3107 | dst->slow = src->slow; |
3108 | dst->has_learn = src->has_learn; | |
3109 | dst->has_normal = src->has_normal; | |
3110 | dst->has_fin_timeout = src->has_fin_timeout; | |
3111 | dst->nf_output_iface = src->nf_output_iface; | |
3112 | dst->mirrors = src->mirrors; | |
3113 | ||
3114 | ofpbuf_use_stub(&dst->odp_actions, dst->odp_actions_stub, | |
3115 | sizeof dst->odp_actions_stub); | |
1f317cb5 PS |
3116 | ofpbuf_put(&dst->odp_actions, ofpbuf_data(&src->odp_actions), |
3117 | ofpbuf_size(&src->odp_actions)); | |
9583bc14 EJ |
3118 | } |
3119 | \f | |
55954f6e EJ |
3120 | static struct skb_priority_to_dscp * |
3121 | get_skb_priority(const struct xport *xport, uint32_t skb_priority) | |
3122 | { | |
3123 | struct skb_priority_to_dscp *pdscp; | |
3124 | uint32_t hash; | |
3125 | ||
3126 | hash = hash_int(skb_priority, 0); | |
3127 | HMAP_FOR_EACH_IN_BUCKET (pdscp, hmap_node, hash, &xport->skb_priorities) { | |
3128 | if (pdscp->skb_priority == skb_priority) { | |
3129 | return pdscp; | |
3130 | } | |
3131 | } | |
3132 | return NULL; | |
3133 | } | |
3134 | ||
3135 | static bool | |
3136 | dscp_from_skb_priority(const struct xport *xport, uint32_t skb_priority, | |
3137 | uint8_t *dscp) | |
3138 | { | |
3139 | struct skb_priority_to_dscp *pdscp = get_skb_priority(xport, skb_priority); | |
3140 | *dscp = pdscp ? pdscp->dscp : 0; | |
3141 | return pdscp != NULL; | |
3142 | } | |
3143 | ||
3144 | static void | |
3145 | clear_skb_priorities(struct xport *xport) | |
3146 | { | |
3147 | struct skb_priority_to_dscp *pdscp, *next; | |
3148 | ||
3149 | HMAP_FOR_EACH_SAFE (pdscp, next, hmap_node, &xport->skb_priorities) { | |
3150 | hmap_remove(&xport->skb_priorities, &pdscp->hmap_node); | |
3151 | free(pdscp); | |
3152 | } | |
3153 | } | |
3154 | ||
ce4a6b76 BP |
3155 | static bool |
3156 | actions_output_to_local_port(const struct xlate_ctx *ctx) | |
3157 | { | |
46c88433 | 3158 | odp_port_t local_odp_port = ofp_port_to_odp_port(ctx->xbridge, OFPP_LOCAL); |
ce4a6b76 BP |
3159 | const struct nlattr *a; |
3160 | unsigned int left; | |
3161 | ||
1f317cb5 PS |
3162 | NL_ATTR_FOR_EACH_UNSAFE (a, left, ofpbuf_data(&ctx->xout->odp_actions), |
3163 | ofpbuf_size(&ctx->xout->odp_actions)) { | |
ce4a6b76 BP |
3164 | if (nl_attr_type(a) == OVS_ACTION_ATTR_OUTPUT |
3165 | && nl_attr_get_odp_port(a) == local_odp_port) { | |
3166 | return true; | |
3167 | } | |
3168 | } | |
3169 | return false; | |
3170 | } | |
9583bc14 | 3171 | |
91d6cd12 AW |
3172 | /* Thread safe call to xlate_actions__(). */ |
3173 | void | |
3174 | xlate_actions(struct xlate_in *xin, struct xlate_out *xout) | |
6a4d3ab5 | 3175 | OVS_EXCLUDED(xlate_rwlock) |
91d6cd12 AW |
3176 | { |
3177 | ovs_rwlock_rdlock(&xlate_rwlock); | |
3178 | xlate_actions__(xin, xout); | |
3179 | ovs_rwlock_unlock(&xlate_rwlock); | |
3180 | } | |
3181 | ||
9583bc14 | 3182 | /* Translates the 'ofpacts_len' bytes of "struct ofpacts" starting at 'ofpacts' |
56450a41 BP |
3183 | * into datapath actions in 'odp_actions', using 'ctx'. |
3184 | * | |
3185 | * The caller must take responsibility for eventually freeing 'xout', with | |
3186 | * xlate_out_uninit(). */ | |
91d6cd12 AW |
3187 | static void |
3188 | xlate_actions__(struct xlate_in *xin, struct xlate_out *xout) | |
3189 | OVS_REQ_RDLOCK(xlate_rwlock) | |
9583bc14 | 3190 | { |
33bf9176 BP |
3191 | struct flow_wildcards *wc = &xout->wc; |
3192 | struct flow *flow = &xin->flow; | |
10c44245 | 3193 | struct rule_dpif *rule = NULL; |
33bf9176 | 3194 | |
dc723c44 | 3195 | const struct rule_actions *actions = NULL; |
9583bc14 EJ |
3196 | enum slow_path_reason special; |
3197 | const struct ofpact *ofpacts; | |
46c88433 | 3198 | struct xport *in_port; |
9583bc14 EJ |
3199 | struct flow orig_flow; |
3200 | struct xlate_ctx ctx; | |
3201 | size_t ofpacts_len; | |
62a7cc71 | 3202 | bool tnl_may_send; |
c56fac1b | 3203 | bool is_icmp; |
9583bc14 | 3204 | |
46c88433 | 3205 | COVERAGE_INC(xlate_actions); |
9583bc14 EJ |
3206 | |
3207 | /* Flow initialization rules: | |
3208 | * - 'base_flow' must match the kernel's view of the packet at the | |
3209 | * time that action processing starts. 'flow' represents any | |
3210 | * transformations we wish to make through actions. | |
3211 | * - By default 'base_flow' and 'flow' are the same since the input | |
3212 | * packet matches the output before any actions are applied. | |
3213 | * - When using VLAN splinters, 'base_flow''s VLAN is set to the value | |
3214 | * of the received packet as seen by the kernel. If we later output | |
3215 | * to another device without any modifications this will cause us to | |
3216 | * insert a new tag since the original one was stripped off by the | |
3217 | * VLAN device. | |
3218 | * - Tunnel metadata as received is retained in 'flow'. This allows | |
3219 | * tunnel metadata matching also in later tables. | |
3220 | * Since a kernel action for setting the tunnel metadata will only be | |
3221 | * generated with actual tunnel output, changing the tunnel metadata | |
3222 | * values in 'flow' (such as tun_id) will only have effect with a later | |
3223 | * tunnel output action. | |
3224 | * - Tunnel 'base_flow' is completely cleared since that is what the | |
3225 | * kernel does. If we wish to maintain the original values an action | |
3226 | * needs to be generated. */ | |
3227 | ||
3228 | ctx.xin = xin; | |
3229 | ctx.xout = xout; | |
46c88433 EJ |
3230 | ctx.xout->slow = 0; |
3231 | ctx.xout->has_learn = false; | |
3232 | ctx.xout->has_normal = false; | |
3233 | ctx.xout->has_fin_timeout = false; | |
3234 | ctx.xout->nf_output_iface = NF_OUT_DROP; | |
3235 | ctx.xout->mirrors = 0; | |
3236 | ofpbuf_use_stub(&ctx.xout->odp_actions, ctx.xout->odp_actions_stub, | |
3237 | sizeof ctx.xout->odp_actions_stub); | |
3238 | ofpbuf_reserve(&ctx.xout->odp_actions, NL_A_U32_SIZE); | |
3239 | ||
3240 | ctx.xbridge = xbridge_lookup(xin->ofproto); | |
3241 | if (!ctx.xbridge) { | |
83709dfa | 3242 | return; |
46c88433 | 3243 | } |
9583bc14 | 3244 | |
9583bc14 EJ |
3245 | ctx.rule = xin->rule; |
3246 | ||
33bf9176 | 3247 | ctx.base_flow = *flow; |
9583bc14 | 3248 | memset(&ctx.base_flow.tunnel, 0, sizeof ctx.base_flow.tunnel); |
33bf9176 | 3249 | ctx.orig_tunnel_ip_dst = flow->tunnel.ip_dst; |
9583bc14 | 3250 | |
33bf9176 BP |
3251 | flow_wildcards_init_catchall(wc); |
3252 | memset(&wc->masks.in_port, 0xff, sizeof wc->masks.in_port); | |
1dd35f8a | 3253 | memset(&wc->masks.skb_priority, 0xff, sizeof wc->masks.skb_priority); |
7431e171 | 3254 | memset(&wc->masks.dl_type, 0xff, sizeof wc->masks.dl_type); |
0934ebba BP |
3255 | if (is_ip_any(flow)) { |
3256 | wc->masks.nw_frag |= FLOW_NW_FRAG_MASK; | |
3257 | } | |
c56fac1b | 3258 | is_icmp = is_icmpv4(flow) || is_icmpv6(flow); |
9583bc14 | 3259 | |
62a7cc71 | 3260 | tnl_may_send = tnl_xlate_init(&ctx.base_flow, flow, wc); |
ce3955be | 3261 | if (ctx.xbridge->netflow) { |
9b658910 | 3262 | netflow_mask_wc(flow, wc); |
9583bc14 EJ |
3263 | } |
3264 | ||
9583bc14 | 3265 | ctx.recurse = 0; |
98b07853 | 3266 | ctx.resubmits = 0; |
5a070238 | 3267 | ctx.in_group = false; |
33bf9176 | 3268 | ctx.orig_skb_priority = flow->skb_priority; |
9583bc14 EJ |
3269 | ctx.table_id = 0; |
3270 | ctx.exit = false; | |
3271 | ||
10c44245 | 3272 | if (!xin->ofpacts && !ctx.rule) { |
6d328fa2 SH |
3273 | ctx.table_id = rule_dpif_lookup(ctx.xbridge->ofproto, flow, |
3274 | !xin->skip_wildcards ? wc : NULL, | |
83709dfa | 3275 | &rule, ctx.xin->xcache != NULL); |
10c44245 EJ |
3276 | if (ctx.xin->resubmit_stats) { |
3277 | rule_dpif_credit_stats(rule, ctx.xin->resubmit_stats); | |
3278 | } | |
b256dc52 JS |
3279 | if (ctx.xin->xcache) { |
3280 | struct xc_entry *entry; | |
3281 | ||
3282 | entry = xlate_cache_add_entry(ctx.xin->xcache, XC_RULE); | |
b256dc52 JS |
3283 | entry->u.rule = rule; |
3284 | } | |
10c44245 EJ |
3285 | ctx.rule = rule; |
3286 | } | |
ee1afdd5 | 3287 | xout->fail_open = ctx.rule && rule_dpif_is_fail_open(ctx.rule); |
adcf00ba | 3288 | xout->use_recirc = false; |
10c44245 | 3289 | |
9583bc14 EJ |
3290 | if (xin->ofpacts) { |
3291 | ofpacts = xin->ofpacts; | |
3292 | ofpacts_len = xin->ofpacts_len; | |
10c44245 EJ |
3293 | } else if (ctx.rule) { |
3294 | actions = rule_dpif_get_actions(ctx.rule); | |
6f00e29b BP |
3295 | ofpacts = actions->ofpacts; |
3296 | ofpacts_len = actions->ofpacts_len; | |
9583bc14 | 3297 | } else { |
428b2edd | 3298 | OVS_NOT_REACHED(); |
9583bc14 EJ |
3299 | } |
3300 | ||
3301 | ofpbuf_use_stub(&ctx.stack, ctx.init_stack, sizeof ctx.init_stack); | |
7fdb60a7 SH |
3302 | ofpbuf_use_stub(&ctx.action_set, |
3303 | ctx.action_set_stub, sizeof ctx.action_set_stub); | |
9583bc14 | 3304 | |
ade6ad9c | 3305 | if (mbridge_has_mirrors(ctx.xbridge->mbridge)) { |
9583bc14 EJ |
3306 | /* Do this conditionally because the copy is expensive enough that it |
3307 | * shows up in profiles. */ | |
33bf9176 | 3308 | orig_flow = *flow; |
9583bc14 EJ |
3309 | } |
3310 | ||
33bf9176 | 3311 | if (flow->nw_frag & FLOW_NW_FRAG_ANY) { |
46c88433 | 3312 | switch (ctx.xbridge->frag) { |
9583bc14 EJ |
3313 | case OFPC_FRAG_NORMAL: |
3314 | /* We must pretend that transport ports are unavailable. */ | |
33bf9176 BP |
3315 | flow->tp_src = ctx.base_flow.tp_src = htons(0); |
3316 | flow->tp_dst = ctx.base_flow.tp_dst = htons(0); | |
9583bc14 EJ |
3317 | break; |
3318 | ||
3319 | case OFPC_FRAG_DROP: | |
83709dfa | 3320 | return; |
9583bc14 EJ |
3321 | |
3322 | case OFPC_FRAG_REASM: | |
428b2edd | 3323 | OVS_NOT_REACHED(); |
9583bc14 EJ |
3324 | |
3325 | case OFPC_FRAG_NX_MATCH: | |
3326 | /* Nothing to do. */ | |
3327 | break; | |
3328 | ||
3329 | case OFPC_INVALID_TTL_TO_CONTROLLER: | |
428b2edd | 3330 | OVS_NOT_REACHED(); |
9583bc14 EJ |
3331 | } |
3332 | } | |
3333 | ||
46c88433 | 3334 | in_port = get_ofp_port(ctx.xbridge, flow->in_port.ofp_port); |
b256dc52 JS |
3335 | if (in_port && in_port->is_tunnel) { |
3336 | if (ctx.xin->resubmit_stats) { | |
3337 | netdev_vport_inc_rx(in_port->netdev, ctx.xin->resubmit_stats); | |
3338 | if (in_port->bfd) { | |
3339 | bfd_account_rx(in_port->bfd, ctx.xin->resubmit_stats); | |
3340 | } | |
3341 | } | |
3342 | if (ctx.xin->xcache) { | |
3343 | struct xc_entry *entry; | |
3344 | ||
3345 | entry = xlate_cache_add_entry(ctx.xin->xcache, XC_NETDEV); | |
3346 | entry->u.dev.rx = netdev_ref(in_port->netdev); | |
3347 | entry->u.dev.bfd = bfd_ref(in_port->bfd); | |
d6fc5f57 EJ |
3348 | } |
3349 | } | |
3350 | ||
642dc74d | 3351 | special = process_special(&ctx, flow, in_port, ctx.xin->packet); |
9583bc14 | 3352 | if (special) { |
04594cd5 | 3353 | ctx.xout->slow |= special; |
9583bc14 | 3354 | } else { |
9583bc14 | 3355 | size_t sample_actions_len; |
9583bc14 | 3356 | |
4e022ec0 | 3357 | if (flow->in_port.ofp_port |
46c88433 EJ |
3358 | != vsp_realdev_to_vlandev(ctx.xbridge->ofproto, |
3359 | flow->in_port.ofp_port, | |
33bf9176 | 3360 | flow->vlan_tci)) { |
9583bc14 EJ |
3361 | ctx.base_flow.vlan_tci = 0; |
3362 | } | |
3363 | ||
3364 | add_sflow_action(&ctx); | |
3365 | add_ipfix_action(&ctx); | |
1f317cb5 | 3366 | sample_actions_len = ofpbuf_size(&ctx.xout->odp_actions); |
9583bc14 | 3367 | |
62a7cc71 | 3368 | if (tnl_may_send && (!in_port || may_receive(in_port, &ctx))) { |
9583bc14 EJ |
3369 | do_xlate_actions(ofpacts, ofpacts_len, &ctx); |
3370 | ||
3371 | /* We've let OFPP_NORMAL and the learning action look at the | |
3372 | * packet, so drop it now if forwarding is disabled. */ | |
9d189a50 | 3373 | if (in_port && !xport_stp_forward_state(in_port)) { |
1f317cb5 | 3374 | ofpbuf_set_size(&ctx.xout->odp_actions, sample_actions_len); |
9583bc14 EJ |
3375 | } |
3376 | } | |
3377 | ||
1f317cb5 | 3378 | if (ofpbuf_size(&ctx.action_set)) { |
7fdb60a7 SH |
3379 | xlate_action_set(&ctx); |
3380 | } | |
3381 | ||
46c88433 | 3382 | if (ctx.xbridge->has_in_band |
ce4a6b76 BP |
3383 | && in_band_must_output_to_local_port(flow) |
3384 | && !actions_output_to_local_port(&ctx)) { | |
9583bc14 EJ |
3385 | compose_output_action(&ctx, OFPP_LOCAL); |
3386 | } | |
aaa0fbae EJ |
3387 | |
3388 | fix_sflow_action(&ctx); | |
3389 | ||
46c88433 | 3390 | if (mbridge_has_mirrors(ctx.xbridge->mbridge)) { |
9583bc14 EJ |
3391 | add_mirror_actions(&ctx, &orig_flow); |
3392 | } | |
9583bc14 EJ |
3393 | } |
3394 | ||
1f317cb5 | 3395 | if (nl_attr_oversized(ofpbuf_size(&ctx.xout->odp_actions))) { |
542024c4 | 3396 | /* These datapath actions are too big for a Netlink attribute, so we |
0f032e95 BP |
3397 | * can't hand them to the kernel directly. dpif_execute() can execute |
3398 | * them one by one with help, so just mark the result as SLOW_ACTION to | |
3399 | * prevent the flow from being installed. */ | |
3400 | COVERAGE_INC(xlate_actions_oversize); | |
3401 | ctx.xout->slow |= SLOW_ACTION; | |
542024c4 BP |
3402 | } |
3403 | ||
b256dc52 JS |
3404 | if (mbridge_has_mirrors(ctx.xbridge->mbridge)) { |
3405 | if (ctx.xin->resubmit_stats) { | |
3406 | mirror_update_stats(ctx.xbridge->mbridge, xout->mirrors, | |
3407 | ctx.xin->resubmit_stats->n_packets, | |
3408 | ctx.xin->resubmit_stats->n_bytes); | |
3409 | } | |
3410 | if (ctx.xin->xcache) { | |
3411 | struct xc_entry *entry; | |
3412 | ||
3413 | entry = xlate_cache_add_entry(ctx.xin->xcache, XC_MIRROR); | |
3414 | entry->u.mirror.mbridge = mbridge_ref(ctx.xbridge->mbridge); | |
3415 | entry->u.mirror.mirrors = xout->mirrors; | |
3416 | } | |
3417 | } | |
3418 | ||
3419 | if (ctx.xbridge->netflow) { | |
3420 | const struct ofpact *ofpacts = actions->ofpacts; | |
3421 | size_t ofpacts_len = actions->ofpacts_len; | |
3422 | ||
3423 | /* Only update netflow if we don't have controller flow. We don't | |
3424 | * report NetFlow expiration messages for such facets because they | |
3425 | * are just part of the control logic for the network, not real | |
3426 | * traffic. */ | |
3427 | if (ofpacts_len == 0 | |
3428 | || ofpacts->type != OFPACT_CONTROLLER | |
3429 | || ofpact_next(ofpacts) < ofpact_end(ofpacts, ofpacts_len)) { | |
3430 | if (ctx.xin->resubmit_stats) { | |
d6fc5f57 EJ |
3431 | netflow_flow_update(ctx.xbridge->netflow, flow, |
3432 | xout->nf_output_iface, | |
3433 | ctx.xin->resubmit_stats); | |
3434 | } | |
b256dc52 JS |
3435 | if (ctx.xin->xcache) { |
3436 | struct xc_entry *entry; | |
3437 | ||
3438 | entry = xlate_cache_add_entry(ctx.xin->xcache, XC_NETFLOW); | |
3439 | entry->u.nf.netflow = netflow_ref(ctx.xbridge->netflow); | |
3440 | entry->u.nf.flow = xmemdup(flow, sizeof *flow); | |
3441 | entry->u.nf.iface = xout->nf_output_iface; | |
3442 | } | |
d6fc5f57 EJ |
3443 | } |
3444 | } | |
3445 | ||
9583bc14 | 3446 | ofpbuf_uninit(&ctx.stack); |
7fdb60a7 | 3447 | ofpbuf_uninit(&ctx.action_set); |
9583bc14 EJ |
3448 | |
3449 | /* Clear the metadata and register wildcard masks, because we won't | |
3450 | * use non-header fields as part of the cache. */ | |
c11c6faa | 3451 | flow_wildcards_clear_non_packet_fields(wc); |
dc24a00f | 3452 | |
c56fac1b BP |
3453 | /* ICMPv4 and ICMPv6 have 8-bit "type" and "code" fields. struct flow uses |
3454 | * the low 8 bits of the 16-bit tp_src and tp_dst members to represent | |
3455 | * these fields. The datapath interface, on the other hand, represents | |
3456 | * them with just 8 bits each. This means that if the high 8 bits of the | |
3457 | * masks for these fields somehow become set, then they will get chopped | |
3458 | * off by a round trip through the datapath, and revalidation will spot | |
3459 | * that as an inconsistency and delete the flow. Avoid the problem here by | |
3460 | * making sure that only the low 8 bits of either field can be unwildcarded | |
3461 | * for ICMP. | |
3462 | */ | |
3463 | if (is_icmp) { | |
3464 | wc->masks.tp_src &= htons(UINT8_MAX); | |
3465 | wc->masks.tp_dst &= htons(UINT8_MAX); | |
3466 | } | |
91d6cd12 AW |
3467 | } |
3468 | ||
3469 | /* Sends 'packet' out 'ofport'. | |
3470 | * May modify 'packet'. | |
3471 | * Returns 0 if successful, otherwise a positive errno value. */ | |
3472 | int | |
3473 | xlate_send_packet(const struct ofport_dpif *ofport, struct ofpbuf *packet) | |
3474 | { | |
91d6cd12 | 3475 | struct xport *xport; |
91d6cd12 | 3476 | struct ofpact_output output; |
91d6cd12 | 3477 | struct flow flow; |
91d6cd12 | 3478 | |
91d6cd12 AW |
3479 | ofpact_init(&output.ofpact, OFPACT_OUTPUT, sizeof output); |
3480 | /* Use OFPP_NONE as the in_port to avoid special packet processing. */ | |
b5e7e61a AZ |
3481 | flow_extract(packet, NULL, &flow); |
3482 | flow.in_port.ofp_port = OFPP_NONE; | |
91d6cd12 AW |
3483 | |
3484 | ovs_rwlock_rdlock(&xlate_rwlock); | |
3485 | xport = xport_lookup(ofport); | |
3486 | if (!xport) { | |
91d6cd12 | 3487 | ovs_rwlock_unlock(&xlate_rwlock); |
02ea2703 | 3488 | return EINVAL; |
91d6cd12 | 3489 | } |
91d6cd12 AW |
3490 | output.port = xport->ofp_port; |
3491 | output.max_len = 0; | |
dc24a00f | 3492 | ovs_rwlock_unlock(&xlate_rwlock); |
e491a67a YT |
3493 | |
3494 | return ofproto_dpif_execute_actions(xport->xbridge->ofproto, &flow, NULL, | |
3495 | &output.ofpact, sizeof output, | |
3496 | packet); | |
9583bc14 | 3497 | } |
b256dc52 JS |
3498 | |
3499 | struct xlate_cache * | |
3500 | xlate_cache_new(void) | |
3501 | { | |
3502 | struct xlate_cache *xcache = xmalloc(sizeof *xcache); | |
3503 | ||
3504 | ofpbuf_init(&xcache->entries, 512); | |
3505 | return xcache; | |
3506 | } | |
3507 | ||
3508 | static struct xc_entry * | |
3509 | xlate_cache_add_entry(struct xlate_cache *xcache, enum xc_type type) | |
3510 | { | |
3511 | struct xc_entry *entry; | |
3512 | ||
3513 | entry = ofpbuf_put_zeros(&xcache->entries, sizeof *entry); | |
3514 | entry->type = type; | |
3515 | ||
3516 | return entry; | |
3517 | } | |
3518 | ||
3519 | static void | |
3520 | xlate_cache_netdev(struct xc_entry *entry, const struct dpif_flow_stats *stats) | |
3521 | { | |
3522 | if (entry->u.dev.tx) { | |
3523 | netdev_vport_inc_tx(entry->u.dev.tx, stats); | |
3524 | } | |
3525 | if (entry->u.dev.rx) { | |
3526 | netdev_vport_inc_rx(entry->u.dev.rx, stats); | |
3527 | } | |
3528 | if (entry->u.dev.bfd) { | |
3529 | bfd_account_rx(entry->u.dev.bfd, stats); | |
3530 | } | |
3531 | } | |
3532 | ||
3533 | static void | |
3534 | xlate_cache_normal(struct ofproto_dpif *ofproto, struct flow *flow, int vlan) | |
3535 | { | |
3536 | struct xbridge *xbridge; | |
3537 | struct xbundle *xbundle; | |
3538 | struct flow_wildcards wc; | |
3539 | ||
3540 | xbridge = xbridge_lookup(ofproto); | |
3541 | if (!xbridge) { | |
3542 | return; | |
3543 | } | |
3544 | ||
3545 | xbundle = lookup_input_bundle(xbridge, flow->in_port.ofp_port, false, | |
3546 | NULL); | |
3547 | if (!xbundle) { | |
3548 | return; | |
3549 | } | |
3550 | ||
3551 | update_learning_table(xbridge, flow, &wc, vlan, xbundle); | |
3552 | } | |
3553 | ||
3554 | /* Push stats and perform side effects of flow translation. */ | |
3555 | void | |
3556 | xlate_push_stats(struct xlate_cache *xcache, bool may_learn, | |
3557 | const struct dpif_flow_stats *stats) | |
3558 | { | |
3559 | struct xc_entry *entry; | |
3560 | struct ofpbuf entries = xcache->entries; | |
3561 | ||
3562 | XC_ENTRY_FOR_EACH (entry, entries, xcache) { | |
3563 | switch (entry->type) { | |
3564 | case XC_RULE: | |
3565 | rule_dpif_credit_stats(entry->u.rule, stats); | |
3566 | break; | |
3567 | case XC_BOND: | |
3568 | bond_account(entry->u.bond.bond, entry->u.bond.flow, | |
3569 | entry->u.bond.vid, stats->n_bytes); | |
3570 | break; | |
3571 | case XC_NETDEV: | |
3572 | xlate_cache_netdev(entry, stats); | |
3573 | break; | |
3574 | case XC_NETFLOW: | |
3575 | netflow_flow_update(entry->u.nf.netflow, entry->u.nf.flow, | |
3576 | entry->u.nf.iface, stats); | |
3577 | break; | |
3578 | case XC_MIRROR: | |
3579 | mirror_update_stats(entry->u.mirror.mbridge, | |
3580 | entry->u.mirror.mirrors, | |
3581 | stats->n_packets, stats->n_bytes); | |
3582 | break; | |
3583 | case XC_LEARN: | |
3584 | if (may_learn) { | |
3585 | struct rule_dpif *rule = entry->u.learn.rule; | |
3586 | ||
3587 | /* Reset the modified time for a rule that is equivalent to | |
83709dfa JR |
3588 | * the currently cached rule. If the rule is not the exact |
3589 | * rule we have cached, update the reference that we have. */ | |
3590 | entry->u.learn.rule = ofproto_dpif_refresh_rule(rule); | |
b256dc52 JS |
3591 | } |
3592 | break; | |
3593 | case XC_NORMAL: | |
3594 | xlate_cache_normal(entry->u.normal.ofproto, entry->u.normal.flow, | |
3595 | entry->u.normal.vlan); | |
3596 | break; | |
3597 | case XC_FIN_TIMEOUT: | |
3598 | xlate_fin_timeout__(entry->u.fin.rule, stats->tcp_flags, | |
3599 | entry->u.fin.idle, entry->u.fin.hard); | |
3600 | break; | |
3601 | default: | |
3602 | OVS_NOT_REACHED(); | |
3603 | } | |
3604 | } | |
3605 | } | |
3606 | ||
3607 | static void | |
3608 | xlate_dev_unref(struct xc_entry *entry) | |
3609 | { | |
3610 | if (entry->u.dev.tx) { | |
3611 | netdev_close(entry->u.dev.tx); | |
3612 | } | |
3613 | if (entry->u.dev.rx) { | |
3614 | netdev_close(entry->u.dev.rx); | |
3615 | } | |
3616 | if (entry->u.dev.bfd) { | |
3617 | bfd_unref(entry->u.dev.bfd); | |
3618 | } | |
3619 | } | |
3620 | ||
3621 | static void | |
3622 | xlate_cache_clear_netflow(struct netflow *netflow, struct flow *flow) | |
3623 | { | |
3624 | netflow_expire(netflow, flow); | |
3625 | netflow_flow_clear(netflow, flow); | |
3626 | netflow_unref(netflow); | |
3627 | free(flow); | |
3628 | } | |
3629 | ||
3630 | void | |
3631 | xlate_cache_clear(struct xlate_cache *xcache) | |
3632 | { | |
3633 | struct xc_entry *entry; | |
3634 | struct ofpbuf entries; | |
3635 | ||
3636 | if (!xcache) { | |
3637 | return; | |
3638 | } | |
3639 | ||
3640 | XC_ENTRY_FOR_EACH (entry, entries, xcache) { | |
3641 | switch (entry->type) { | |
3642 | case XC_RULE: | |
3643 | rule_dpif_unref(entry->u.rule); | |
3644 | break; | |
3645 | case XC_BOND: | |
3646 | free(entry->u.bond.flow); | |
3647 | bond_unref(entry->u.bond.bond); | |
3648 | break; | |
3649 | case XC_NETDEV: | |
3650 | xlate_dev_unref(entry); | |
3651 | break; | |
3652 | case XC_NETFLOW: | |
3653 | xlate_cache_clear_netflow(entry->u.nf.netflow, entry->u.nf.flow); | |
3654 | break; | |
3655 | case XC_MIRROR: | |
3656 | mbridge_unref(entry->u.mirror.mbridge); | |
3657 | break; | |
3658 | case XC_LEARN: | |
83709dfa | 3659 | /* 'u.learn.rule' is the learned rule. */ |
b256dc52 JS |
3660 | rule_dpif_unref(entry->u.learn.rule); |
3661 | break; | |
3662 | case XC_NORMAL: | |
3663 | free(entry->u.normal.flow); | |
3664 | break; | |
3665 | case XC_FIN_TIMEOUT: | |
83709dfa JR |
3666 | /* 'u.fin.rule' is always already held as a XC_RULE, which |
3667 | * has already released it's reference above. */ | |
b256dc52 JS |
3668 | break; |
3669 | default: | |
3670 | OVS_NOT_REACHED(); | |
3671 | } | |
3672 | } | |
3673 | ||
3674 | ofpbuf_clear(&xcache->entries); | |
3675 | } | |
3676 | ||
3677 | void | |
3678 | xlate_cache_delete(struct xlate_cache *xcache) | |
3679 | { | |
3680 | xlate_cache_clear(xcache); | |
3681 | ofpbuf_uninit(&xcache->entries); | |
3682 | free(xcache); | |
3683 | } |