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1 | /* | |
2 | * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc. | |
3 | * | |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
18 | #include "dpif-provider.h" | |
19 | ||
20 | #include <ctype.h> | |
21 | #include <errno.h> | |
22 | #include <inttypes.h> | |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
25 | ||
26 | #include "coverage.h" | |
27 | #include "dynamic-string.h" | |
28 | #include "flow.h" | |
29 | #include "netdev.h" | |
30 | #include "netlink.h" | |
31 | #include "odp-execute.h" | |
32 | #include "odp-util.h" | |
33 | #include "ofp-errors.h" | |
34 | #include "ofp-print.h" | |
35 | #include "ofp-util.h" | |
36 | #include "ofpbuf.h" | |
37 | #include "packet-dpif.h" | |
38 | #include "packets.h" | |
39 | #include "poll-loop.h" | |
40 | #include "shash.h" | |
41 | #include "sset.h" | |
42 | #include "timeval.h" | |
43 | #include "util.h" | |
44 | #include "valgrind.h" | |
45 | #include "vlog.h" | |
46 | ||
47 | VLOG_DEFINE_THIS_MODULE(dpif); | |
48 | ||
49 | COVERAGE_DEFINE(dpif_destroy); | |
50 | COVERAGE_DEFINE(dpif_port_add); | |
51 | COVERAGE_DEFINE(dpif_port_del); | |
52 | COVERAGE_DEFINE(dpif_flow_flush); | |
53 | COVERAGE_DEFINE(dpif_flow_get); | |
54 | COVERAGE_DEFINE(dpif_flow_put); | |
55 | COVERAGE_DEFINE(dpif_flow_del); | |
56 | COVERAGE_DEFINE(dpif_execute); | |
57 | COVERAGE_DEFINE(dpif_purge); | |
58 | COVERAGE_DEFINE(dpif_execute_with_help); | |
59 | ||
60 | static const struct dpif_class *base_dpif_classes[] = { | |
61 | #ifdef __linux__ | |
62 | &dpif_linux_class, | |
63 | #endif | |
64 | &dpif_netdev_class, | |
65 | }; | |
66 | ||
67 | struct registered_dpif_class { | |
68 | const struct dpif_class *dpif_class; | |
69 | int refcount; | |
70 | }; | |
71 | static struct shash dpif_classes = SHASH_INITIALIZER(&dpif_classes); | |
72 | static struct sset dpif_blacklist = SSET_INITIALIZER(&dpif_blacklist); | |
73 | ||
74 | /* Protects 'dpif_classes', including the refcount, and 'dpif_blacklist'. */ | |
75 | static struct ovs_mutex dpif_mutex = OVS_MUTEX_INITIALIZER; | |
76 | ||
77 | /* Rate limit for individual messages going to or from the datapath, output at | |
78 | * DBG level. This is very high because, if these are enabled, it is because | |
79 | * we really need to see them. */ | |
80 | static struct vlog_rate_limit dpmsg_rl = VLOG_RATE_LIMIT_INIT(600, 600); | |
81 | ||
82 | /* Not really much point in logging many dpif errors. */ | |
83 | static struct vlog_rate_limit error_rl = VLOG_RATE_LIMIT_INIT(60, 5); | |
84 | ||
85 | static void log_flow_message(const struct dpif *dpif, int error, | |
86 | const char *operation, | |
87 | const struct nlattr *key, size_t key_len, | |
88 | const struct nlattr *mask, size_t mask_len, | |
89 | const struct dpif_flow_stats *stats, | |
90 | const struct nlattr *actions, size_t actions_len); | |
91 | static void log_operation(const struct dpif *, const char *operation, | |
92 | int error); | |
93 | static bool should_log_flow_message(int error); | |
94 | static void log_flow_put_message(struct dpif *, const struct dpif_flow_put *, | |
95 | int error); | |
96 | static void log_flow_del_message(struct dpif *, const struct dpif_flow_del *, | |
97 | int error); | |
98 | static void log_execute_message(struct dpif *, const struct dpif_execute *, | |
99 | bool subexecute, int error); | |
100 | ||
101 | static void | |
102 | dp_initialize(void) | |
103 | { | |
104 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; | |
105 | ||
106 | if (ovsthread_once_start(&once)) { | |
107 | int i; | |
108 | ||
109 | for (i = 0; i < ARRAY_SIZE(base_dpif_classes); i++) { | |
110 | dp_register_provider(base_dpif_classes[i]); | |
111 | } | |
112 | ovsthread_once_done(&once); | |
113 | } | |
114 | } | |
115 | ||
116 | static int | |
117 | dp_register_provider__(const struct dpif_class *new_class) | |
118 | { | |
119 | struct registered_dpif_class *registered_class; | |
120 | ||
121 | if (sset_contains(&dpif_blacklist, new_class->type)) { | |
122 | VLOG_DBG("attempted to register blacklisted provider: %s", | |
123 | new_class->type); | |
124 | return EINVAL; | |
125 | } | |
126 | ||
127 | if (shash_find(&dpif_classes, new_class->type)) { | |
128 | VLOG_WARN("attempted to register duplicate datapath provider: %s", | |
129 | new_class->type); | |
130 | return EEXIST; | |
131 | } | |
132 | ||
133 | registered_class = xmalloc(sizeof *registered_class); | |
134 | registered_class->dpif_class = new_class; | |
135 | registered_class->refcount = 0; | |
136 | ||
137 | shash_add(&dpif_classes, new_class->type, registered_class); | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | /* Registers a new datapath provider. After successful registration, new | |
143 | * datapaths of that type can be opened using dpif_open(). */ | |
144 | int | |
145 | dp_register_provider(const struct dpif_class *new_class) | |
146 | { | |
147 | int error; | |
148 | ||
149 | ovs_mutex_lock(&dpif_mutex); | |
150 | error = dp_register_provider__(new_class); | |
151 | ovs_mutex_unlock(&dpif_mutex); | |
152 | ||
153 | return error; | |
154 | } | |
155 | ||
156 | /* Unregisters a datapath provider. 'type' must have been previously | |
157 | * registered and not currently be in use by any dpifs. After unregistration | |
158 | * new datapaths of that type cannot be opened using dpif_open(). */ | |
159 | static int | |
160 | dp_unregister_provider__(const char *type) | |
161 | { | |
162 | struct shash_node *node; | |
163 | struct registered_dpif_class *registered_class; | |
164 | ||
165 | node = shash_find(&dpif_classes, type); | |
166 | if (!node) { | |
167 | VLOG_WARN("attempted to unregister a datapath provider that is not " | |
168 | "registered: %s", type); | |
169 | return EAFNOSUPPORT; | |
170 | } | |
171 | ||
172 | registered_class = node->data; | |
173 | if (registered_class->refcount) { | |
174 | VLOG_WARN("attempted to unregister in use datapath provider: %s", type); | |
175 | return EBUSY; | |
176 | } | |
177 | ||
178 | shash_delete(&dpif_classes, node); | |
179 | free(registered_class); | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
184 | /* Unregisters a datapath provider. 'type' must have been previously | |
185 | * registered and not currently be in use by any dpifs. After unregistration | |
186 | * new datapaths of that type cannot be opened using dpif_open(). */ | |
187 | int | |
188 | dp_unregister_provider(const char *type) | |
189 | { | |
190 | int error; | |
191 | ||
192 | dp_initialize(); | |
193 | ||
194 | ovs_mutex_lock(&dpif_mutex); | |
195 | error = dp_unregister_provider__(type); | |
196 | ovs_mutex_unlock(&dpif_mutex); | |
197 | ||
198 | return error; | |
199 | } | |
200 | ||
201 | /* Blacklists a provider. Causes future calls of dp_register_provider() with | |
202 | * a dpif_class which implements 'type' to fail. */ | |
203 | void | |
204 | dp_blacklist_provider(const char *type) | |
205 | { | |
206 | ovs_mutex_lock(&dpif_mutex); | |
207 | sset_add(&dpif_blacklist, type); | |
208 | ovs_mutex_unlock(&dpif_mutex); | |
209 | } | |
210 | ||
211 | /* Clears 'types' and enumerates the types of all currently registered datapath | |
212 | * providers into it. The caller must first initialize the sset. */ | |
213 | void | |
214 | dp_enumerate_types(struct sset *types) | |
215 | { | |
216 | struct shash_node *node; | |
217 | ||
218 | dp_initialize(); | |
219 | sset_clear(types); | |
220 | ||
221 | ovs_mutex_lock(&dpif_mutex); | |
222 | SHASH_FOR_EACH(node, &dpif_classes) { | |
223 | const struct registered_dpif_class *registered_class = node->data; | |
224 | sset_add(types, registered_class->dpif_class->type); | |
225 | } | |
226 | ovs_mutex_unlock(&dpif_mutex); | |
227 | } | |
228 | ||
229 | static void | |
230 | dp_class_unref(struct registered_dpif_class *rc) | |
231 | { | |
232 | ovs_mutex_lock(&dpif_mutex); | |
233 | ovs_assert(rc->refcount); | |
234 | rc->refcount--; | |
235 | ovs_mutex_unlock(&dpif_mutex); | |
236 | } | |
237 | ||
238 | static struct registered_dpif_class * | |
239 | dp_class_lookup(const char *type) | |
240 | { | |
241 | struct registered_dpif_class *rc; | |
242 | ||
243 | ovs_mutex_lock(&dpif_mutex); | |
244 | rc = shash_find_data(&dpif_classes, type); | |
245 | if (rc) { | |
246 | rc->refcount++; | |
247 | } | |
248 | ovs_mutex_unlock(&dpif_mutex); | |
249 | ||
250 | return rc; | |
251 | } | |
252 | ||
253 | /* Clears 'names' and enumerates the names of all known created datapaths with | |
254 | * the given 'type'. The caller must first initialize the sset. Returns 0 if | |
255 | * successful, otherwise a positive errno value. | |
256 | * | |
257 | * Some kinds of datapaths might not be practically enumerable. This is not | |
258 | * considered an error. */ | |
259 | int | |
260 | dp_enumerate_names(const char *type, struct sset *names) | |
261 | { | |
262 | struct registered_dpif_class *registered_class; | |
263 | const struct dpif_class *dpif_class; | |
264 | int error; | |
265 | ||
266 | dp_initialize(); | |
267 | sset_clear(names); | |
268 | ||
269 | registered_class = dp_class_lookup(type); | |
270 | if (!registered_class) { | |
271 | VLOG_WARN("could not enumerate unknown type: %s", type); | |
272 | return EAFNOSUPPORT; | |
273 | } | |
274 | ||
275 | dpif_class = registered_class->dpif_class; | |
276 | error = (dpif_class->enumerate | |
277 | ? dpif_class->enumerate(names, dpif_class) | |
278 | : 0); | |
279 | if (error) { | |
280 | VLOG_WARN("failed to enumerate %s datapaths: %s", dpif_class->type, | |
281 | ovs_strerror(error)); | |
282 | } | |
283 | dp_class_unref(registered_class); | |
284 | ||
285 | return error; | |
286 | } | |
287 | ||
288 | /* Parses 'datapath_name_', which is of the form [type@]name into its | |
289 | * component pieces. 'name' and 'type' must be freed by the caller. | |
290 | * | |
291 | * The returned 'type' is normalized, as if by dpif_normalize_type(). */ | |
292 | void | |
293 | dp_parse_name(const char *datapath_name_, char **name, char **type) | |
294 | { | |
295 | char *datapath_name = xstrdup(datapath_name_); | |
296 | char *separator; | |
297 | ||
298 | separator = strchr(datapath_name, '@'); | |
299 | if (separator) { | |
300 | *separator = '\0'; | |
301 | *type = datapath_name; | |
302 | *name = xstrdup(dpif_normalize_type(separator + 1)); | |
303 | } else { | |
304 | *name = datapath_name; | |
305 | *type = xstrdup(dpif_normalize_type(NULL)); | |
306 | } | |
307 | } | |
308 | ||
309 | static int | |
310 | do_open(const char *name, const char *type, bool create, struct dpif **dpifp) | |
311 | { | |
312 | struct dpif *dpif = NULL; | |
313 | int error; | |
314 | struct registered_dpif_class *registered_class; | |
315 | ||
316 | dp_initialize(); | |
317 | ||
318 | type = dpif_normalize_type(type); | |
319 | registered_class = dp_class_lookup(type); | |
320 | if (!registered_class) { | |
321 | VLOG_WARN("could not create datapath %s of unknown type %s", name, | |
322 | type); | |
323 | error = EAFNOSUPPORT; | |
324 | goto exit; | |
325 | } | |
326 | ||
327 | error = registered_class->dpif_class->open(registered_class->dpif_class, | |
328 | name, create, &dpif); | |
329 | if (!error) { | |
330 | ovs_assert(dpif->dpif_class == registered_class->dpif_class); | |
331 | } else { | |
332 | dp_class_unref(registered_class); | |
333 | } | |
334 | ||
335 | exit: | |
336 | *dpifp = error ? NULL : dpif; | |
337 | return error; | |
338 | } | |
339 | ||
340 | /* Tries to open an existing datapath named 'name' and type 'type'. Will fail | |
341 | * if no datapath with 'name' and 'type' exists. 'type' may be either NULL or | |
342 | * the empty string to specify the default system type. Returns 0 if | |
343 | * successful, otherwise a positive errno value. On success stores a pointer | |
344 | * to the datapath in '*dpifp', otherwise a null pointer. */ | |
345 | int | |
346 | dpif_open(const char *name, const char *type, struct dpif **dpifp) | |
347 | { | |
348 | return do_open(name, type, false, dpifp); | |
349 | } | |
350 | ||
351 | /* Tries to create and open a new datapath with the given 'name' and 'type'. | |
352 | * 'type' may be either NULL or the empty string to specify the default system | |
353 | * type. Will fail if a datapath with 'name' and 'type' already exists. | |
354 | * Returns 0 if successful, otherwise a positive errno value. On success | |
355 | * stores a pointer to the datapath in '*dpifp', otherwise a null pointer. */ | |
356 | int | |
357 | dpif_create(const char *name, const char *type, struct dpif **dpifp) | |
358 | { | |
359 | return do_open(name, type, true, dpifp); | |
360 | } | |
361 | ||
362 | /* Tries to open a datapath with the given 'name' and 'type', creating it if it | |
363 | * does not exist. 'type' may be either NULL or the empty string to specify | |
364 | * the default system type. Returns 0 if successful, otherwise a positive | |
365 | * errno value. On success stores a pointer to the datapath in '*dpifp', | |
366 | * otherwise a null pointer. */ | |
367 | int | |
368 | dpif_create_and_open(const char *name, const char *type, struct dpif **dpifp) | |
369 | { | |
370 | int error; | |
371 | ||
372 | error = dpif_create(name, type, dpifp); | |
373 | if (error == EEXIST || error == EBUSY) { | |
374 | error = dpif_open(name, type, dpifp); | |
375 | if (error) { | |
376 | VLOG_WARN("datapath %s already exists but cannot be opened: %s", | |
377 | name, ovs_strerror(error)); | |
378 | } | |
379 | } else if (error) { | |
380 | VLOG_WARN("failed to create datapath %s: %s", | |
381 | name, ovs_strerror(error)); | |
382 | } | |
383 | return error; | |
384 | } | |
385 | ||
386 | /* Closes and frees the connection to 'dpif'. Does not destroy the datapath | |
387 | * itself; call dpif_delete() first, instead, if that is desirable. */ | |
388 | void | |
389 | dpif_close(struct dpif *dpif) | |
390 | { | |
391 | if (dpif) { | |
392 | struct registered_dpif_class *rc; | |
393 | ||
394 | rc = shash_find_data(&dpif_classes, dpif->dpif_class->type); | |
395 | dpif_uninit(dpif, true); | |
396 | dp_class_unref(rc); | |
397 | } | |
398 | } | |
399 | ||
400 | /* Performs periodic work needed by 'dpif'. */ | |
401 | void | |
402 | dpif_run(struct dpif *dpif) | |
403 | { | |
404 | if (dpif->dpif_class->run) { | |
405 | dpif->dpif_class->run(dpif); | |
406 | } | |
407 | } | |
408 | ||
409 | /* Arranges for poll_block() to wake up when dp_run() needs to be called for | |
410 | * 'dpif'. */ | |
411 | void | |
412 | dpif_wait(struct dpif *dpif) | |
413 | { | |
414 | if (dpif->dpif_class->wait) { | |
415 | dpif->dpif_class->wait(dpif); | |
416 | } | |
417 | } | |
418 | ||
419 | /* Returns the name of datapath 'dpif' prefixed with the type | |
420 | * (for use in log messages). */ | |
421 | const char * | |
422 | dpif_name(const struct dpif *dpif) | |
423 | { | |
424 | return dpif->full_name; | |
425 | } | |
426 | ||
427 | /* Returns the name of datapath 'dpif' without the type | |
428 | * (for use in device names). */ | |
429 | const char * | |
430 | dpif_base_name(const struct dpif *dpif) | |
431 | { | |
432 | return dpif->base_name; | |
433 | } | |
434 | ||
435 | /* Returns the type of datapath 'dpif'. */ | |
436 | const char * | |
437 | dpif_type(const struct dpif *dpif) | |
438 | { | |
439 | return dpif->dpif_class->type; | |
440 | } | |
441 | ||
442 | /* Returns the fully spelled out name for the given datapath 'type'. | |
443 | * | |
444 | * Normalized type string can be compared with strcmp(). Unnormalized type | |
445 | * string might be the same even if they have different spellings. */ | |
446 | const char * | |
447 | dpif_normalize_type(const char *type) | |
448 | { | |
449 | return type && type[0] ? type : "system"; | |
450 | } | |
451 | ||
452 | /* Destroys the datapath that 'dpif' is connected to, first removing all of its | |
453 | * ports. After calling this function, it does not make sense to pass 'dpif' | |
454 | * to any functions other than dpif_name() or dpif_close(). */ | |
455 | int | |
456 | dpif_delete(struct dpif *dpif) | |
457 | { | |
458 | int error; | |
459 | ||
460 | COVERAGE_INC(dpif_destroy); | |
461 | ||
462 | error = dpif->dpif_class->destroy(dpif); | |
463 | log_operation(dpif, "delete", error); | |
464 | return error; | |
465 | } | |
466 | ||
467 | /* Retrieves statistics for 'dpif' into 'stats'. Returns 0 if successful, | |
468 | * otherwise a positive errno value. */ | |
469 | int | |
470 | dpif_get_dp_stats(const struct dpif *dpif, struct dpif_dp_stats *stats) | |
471 | { | |
472 | int error = dpif->dpif_class->get_stats(dpif, stats); | |
473 | if (error) { | |
474 | memset(stats, 0, sizeof *stats); | |
475 | } | |
476 | log_operation(dpif, "get_stats", error); | |
477 | return error; | |
478 | } | |
479 | ||
480 | const char * | |
481 | dpif_port_open_type(const char *datapath_type, const char *port_type) | |
482 | { | |
483 | struct registered_dpif_class *rc; | |
484 | ||
485 | datapath_type = dpif_normalize_type(datapath_type); | |
486 | ||
487 | ovs_mutex_lock(&dpif_mutex); | |
488 | rc = shash_find_data(&dpif_classes, datapath_type); | |
489 | if (rc && rc->dpif_class->port_open_type) { | |
490 | port_type = rc->dpif_class->port_open_type(rc->dpif_class, port_type); | |
491 | } | |
492 | ovs_mutex_unlock(&dpif_mutex); | |
493 | ||
494 | return port_type; | |
495 | } | |
496 | ||
497 | /* Attempts to add 'netdev' as a port on 'dpif'. If 'port_nop' is | |
498 | * non-null and its value is not ODPP_NONE, then attempts to use the | |
499 | * value as the port number. | |
500 | * | |
501 | * If successful, returns 0 and sets '*port_nop' to the new port's port | |
502 | * number (if 'port_nop' is non-null). On failure, returns a positive | |
503 | * errno value and sets '*port_nop' to ODPP_NONE (if 'port_nop' is | |
504 | * non-null). */ | |
505 | int | |
506 | dpif_port_add(struct dpif *dpif, struct netdev *netdev, odp_port_t *port_nop) | |
507 | { | |
508 | const char *netdev_name = netdev_get_name(netdev); | |
509 | odp_port_t port_no = ODPP_NONE; | |
510 | int error; | |
511 | ||
512 | COVERAGE_INC(dpif_port_add); | |
513 | ||
514 | if (port_nop) { | |
515 | port_no = *port_nop; | |
516 | } | |
517 | ||
518 | error = dpif->dpif_class->port_add(dpif, netdev, &port_no); | |
519 | if (!error) { | |
520 | VLOG_DBG_RL(&dpmsg_rl, "%s: added %s as port %"PRIu32, | |
521 | dpif_name(dpif), netdev_name, port_no); | |
522 | } else { | |
523 | VLOG_WARN_RL(&error_rl, "%s: failed to add %s as port: %s", | |
524 | dpif_name(dpif), netdev_name, ovs_strerror(error)); | |
525 | port_no = ODPP_NONE; | |
526 | } | |
527 | if (port_nop) { | |
528 | *port_nop = port_no; | |
529 | } | |
530 | return error; | |
531 | } | |
532 | ||
533 | /* Attempts to remove 'dpif''s port number 'port_no'. Returns 0 if successful, | |
534 | * otherwise a positive errno value. */ | |
535 | int | |
536 | dpif_port_del(struct dpif *dpif, odp_port_t port_no) | |
537 | { | |
538 | int error; | |
539 | ||
540 | COVERAGE_INC(dpif_port_del); | |
541 | ||
542 | error = dpif->dpif_class->port_del(dpif, port_no); | |
543 | if (!error) { | |
544 | VLOG_DBG_RL(&dpmsg_rl, "%s: port_del(%"PRIu32")", | |
545 | dpif_name(dpif), port_no); | |
546 | } else { | |
547 | log_operation(dpif, "port_del", error); | |
548 | } | |
549 | return error; | |
550 | } | |
551 | ||
552 | /* Makes a deep copy of 'src' into 'dst'. */ | |
553 | void | |
554 | dpif_port_clone(struct dpif_port *dst, const struct dpif_port *src) | |
555 | { | |
556 | dst->name = xstrdup(src->name); | |
557 | dst->type = xstrdup(src->type); | |
558 | dst->port_no = src->port_no; | |
559 | } | |
560 | ||
561 | /* Frees memory allocated to members of 'dpif_port'. | |
562 | * | |
563 | * Do not call this function on a dpif_port obtained from | |
564 | * dpif_port_dump_next(): that function retains ownership of the data in the | |
565 | * dpif_port. */ | |
566 | void | |
567 | dpif_port_destroy(struct dpif_port *dpif_port) | |
568 | { | |
569 | free(dpif_port->name); | |
570 | free(dpif_port->type); | |
571 | } | |
572 | ||
573 | /* Checks if port named 'devname' exists in 'dpif'. If so, returns | |
574 | * true; otherwise, returns false. */ | |
575 | bool | |
576 | dpif_port_exists(const struct dpif *dpif, const char *devname) | |
577 | { | |
578 | int error = dpif->dpif_class->port_query_by_name(dpif, devname, NULL); | |
579 | if (error != 0 && error != ENOENT && error != ENODEV) { | |
580 | VLOG_WARN_RL(&error_rl, "%s: failed to query port %s: %s", | |
581 | dpif_name(dpif), devname, ovs_strerror(error)); | |
582 | } | |
583 | ||
584 | return !error; | |
585 | } | |
586 | ||
587 | /* Looks up port number 'port_no' in 'dpif'. On success, returns 0 and | |
588 | * initializes '*port' appropriately; on failure, returns a positive errno | |
589 | * value. | |
590 | * | |
591 | * The caller owns the data in 'port' and must free it with | |
592 | * dpif_port_destroy() when it is no longer needed. */ | |
593 | int | |
594 | dpif_port_query_by_number(const struct dpif *dpif, odp_port_t port_no, | |
595 | struct dpif_port *port) | |
596 | { | |
597 | int error = dpif->dpif_class->port_query_by_number(dpif, port_no, port); | |
598 | if (!error) { | |
599 | VLOG_DBG_RL(&dpmsg_rl, "%s: port %"PRIu32" is device %s", | |
600 | dpif_name(dpif), port_no, port->name); | |
601 | } else { | |
602 | memset(port, 0, sizeof *port); | |
603 | VLOG_WARN_RL(&error_rl, "%s: failed to query port %"PRIu32": %s", | |
604 | dpif_name(dpif), port_no, ovs_strerror(error)); | |
605 | } | |
606 | return error; | |
607 | } | |
608 | ||
609 | /* Looks up port named 'devname' in 'dpif'. On success, returns 0 and | |
610 | * initializes '*port' appropriately; on failure, returns a positive errno | |
611 | * value. | |
612 | * | |
613 | * The caller owns the data in 'port' and must free it with | |
614 | * dpif_port_destroy() when it is no longer needed. */ | |
615 | int | |
616 | dpif_port_query_by_name(const struct dpif *dpif, const char *devname, | |
617 | struct dpif_port *port) | |
618 | { | |
619 | int error = dpif->dpif_class->port_query_by_name(dpif, devname, port); | |
620 | if (!error) { | |
621 | VLOG_DBG_RL(&dpmsg_rl, "%s: device %s is on port %"PRIu32, | |
622 | dpif_name(dpif), devname, port->port_no); | |
623 | } else { | |
624 | memset(port, 0, sizeof *port); | |
625 | ||
626 | /* For ENOENT or ENODEV we use DBG level because the caller is probably | |
627 | * interested in whether 'dpif' actually has a port 'devname', so that | |
628 | * it's not an issue worth logging if it doesn't. Other errors are | |
629 | * uncommon and more likely to indicate a real problem. */ | |
630 | VLOG_RL(&error_rl, | |
631 | error == ENOENT || error == ENODEV ? VLL_DBG : VLL_WARN, | |
632 | "%s: failed to query port %s: %s", | |
633 | dpif_name(dpif), devname, ovs_strerror(error)); | |
634 | } | |
635 | return error; | |
636 | } | |
637 | ||
638 | /* Returns the Netlink PID value to supply in OVS_ACTION_ATTR_USERSPACE | |
639 | * actions as the OVS_USERSPACE_ATTR_PID attribute's value, for use in | |
640 | * flows whose packets arrived on port 'port_no'. In the case where the | |
641 | * provider allocates multiple Netlink PIDs to a single port, it may use | |
642 | * 'hash' to spread load among them. The caller need not use a particular | |
643 | * hash function; a 5-tuple hash is suitable. | |
644 | * | |
645 | * (The datapath implementation might use some different hash function for | |
646 | * distributing packets received via flow misses among PIDs. This means | |
647 | * that packets received via flow misses might be reordered relative to | |
648 | * packets received via userspace actions. This is not ordinarily a | |
649 | * problem.) | |
650 | * | |
651 | * A 'port_no' of ODPP_NONE is a special case: it returns a reserved PID, not | |
652 | * allocated to any port, that the client may use for special purposes. | |
653 | * | |
654 | * The return value is only meaningful when DPIF_UC_ACTION has been enabled in | |
655 | * the 'dpif''s listen mask. It is allowed to change when DPIF_UC_ACTION is | |
656 | * disabled and then re-enabled, so a client that does that must be prepared to | |
657 | * update all of the flows that it installed that contain | |
658 | * OVS_ACTION_ATTR_USERSPACE actions. */ | |
659 | uint32_t | |
660 | dpif_port_get_pid(const struct dpif *dpif, odp_port_t port_no, uint32_t hash) | |
661 | { | |
662 | return (dpif->dpif_class->port_get_pid | |
663 | ? (dpif->dpif_class->port_get_pid)(dpif, port_no, hash) | |
664 | : 0); | |
665 | } | |
666 | ||
667 | /* Looks up port number 'port_no' in 'dpif'. On success, returns 0 and copies | |
668 | * the port's name into the 'name_size' bytes in 'name', ensuring that the | |
669 | * result is null-terminated. On failure, returns a positive errno value and | |
670 | * makes 'name' the empty string. */ | |
671 | int | |
672 | dpif_port_get_name(struct dpif *dpif, odp_port_t port_no, | |
673 | char *name, size_t name_size) | |
674 | { | |
675 | struct dpif_port port; | |
676 | int error; | |
677 | ||
678 | ovs_assert(name_size > 0); | |
679 | ||
680 | error = dpif_port_query_by_number(dpif, port_no, &port); | |
681 | if (!error) { | |
682 | ovs_strlcpy(name, port.name, name_size); | |
683 | dpif_port_destroy(&port); | |
684 | } else { | |
685 | *name = '\0'; | |
686 | } | |
687 | return error; | |
688 | } | |
689 | ||
690 | /* Initializes 'dump' to begin dumping the ports in a dpif. | |
691 | * | |
692 | * This function provides no status indication. An error status for the entire | |
693 | * dump operation is provided when it is completed by calling | |
694 | * dpif_port_dump_done(). | |
695 | */ | |
696 | void | |
697 | dpif_port_dump_start(struct dpif_port_dump *dump, const struct dpif *dpif) | |
698 | { | |
699 | dump->dpif = dpif; | |
700 | dump->error = dpif->dpif_class->port_dump_start(dpif, &dump->state); | |
701 | log_operation(dpif, "port_dump_start", dump->error); | |
702 | } | |
703 | ||
704 | /* Attempts to retrieve another port from 'dump', which must have been | |
705 | * initialized with dpif_port_dump_start(). On success, stores a new dpif_port | |
706 | * into 'port' and returns true. On failure, returns false. | |
707 | * | |
708 | * Failure might indicate an actual error or merely that the last port has been | |
709 | * dumped. An error status for the entire dump operation is provided when it | |
710 | * is completed by calling dpif_port_dump_done(). | |
711 | * | |
712 | * The dpif owns the data stored in 'port'. It will remain valid until at | |
713 | * least the next time 'dump' is passed to dpif_port_dump_next() or | |
714 | * dpif_port_dump_done(). */ | |
715 | bool | |
716 | dpif_port_dump_next(struct dpif_port_dump *dump, struct dpif_port *port) | |
717 | { | |
718 | const struct dpif *dpif = dump->dpif; | |
719 | ||
720 | if (dump->error) { | |
721 | return false; | |
722 | } | |
723 | ||
724 | dump->error = dpif->dpif_class->port_dump_next(dpif, dump->state, port); | |
725 | if (dump->error == EOF) { | |
726 | VLOG_DBG_RL(&dpmsg_rl, "%s: dumped all ports", dpif_name(dpif)); | |
727 | } else { | |
728 | log_operation(dpif, "port_dump_next", dump->error); | |
729 | } | |
730 | ||
731 | if (dump->error) { | |
732 | dpif->dpif_class->port_dump_done(dpif, dump->state); | |
733 | return false; | |
734 | } | |
735 | return true; | |
736 | } | |
737 | ||
738 | /* Completes port table dump operation 'dump', which must have been initialized | |
739 | * with dpif_port_dump_start(). Returns 0 if the dump operation was | |
740 | * error-free, otherwise a positive errno value describing the problem. */ | |
741 | int | |
742 | dpif_port_dump_done(struct dpif_port_dump *dump) | |
743 | { | |
744 | const struct dpif *dpif = dump->dpif; | |
745 | if (!dump->error) { | |
746 | dump->error = dpif->dpif_class->port_dump_done(dpif, dump->state); | |
747 | log_operation(dpif, "port_dump_done", dump->error); | |
748 | } | |
749 | return dump->error == EOF ? 0 : dump->error; | |
750 | } | |
751 | ||
752 | /* Polls for changes in the set of ports in 'dpif'. If the set of ports in | |
753 | * 'dpif' has changed, this function does one of the following: | |
754 | * | |
755 | * - Stores the name of the device that was added to or deleted from 'dpif' in | |
756 | * '*devnamep' and returns 0. The caller is responsible for freeing | |
757 | * '*devnamep' (with free()) when it no longer needs it. | |
758 | * | |
759 | * - Returns ENOBUFS and sets '*devnamep' to NULL. | |
760 | * | |
761 | * This function may also return 'false positives', where it returns 0 and | |
762 | * '*devnamep' names a device that was not actually added or deleted or it | |
763 | * returns ENOBUFS without any change. | |
764 | * | |
765 | * Returns EAGAIN if the set of ports in 'dpif' has not changed. May also | |
766 | * return other positive errno values to indicate that something has gone | |
767 | * wrong. */ | |
768 | int | |
769 | dpif_port_poll(const struct dpif *dpif, char **devnamep) | |
770 | { | |
771 | int error = dpif->dpif_class->port_poll(dpif, devnamep); | |
772 | if (error) { | |
773 | *devnamep = NULL; | |
774 | } | |
775 | return error; | |
776 | } | |
777 | ||
778 | /* Arranges for the poll loop to wake up when port_poll(dpif) will return a | |
779 | * value other than EAGAIN. */ | |
780 | void | |
781 | dpif_port_poll_wait(const struct dpif *dpif) | |
782 | { | |
783 | dpif->dpif_class->port_poll_wait(dpif); | |
784 | } | |
785 | ||
786 | /* Extracts the flow stats for a packet. The 'flow' and 'packet' | |
787 | * arguments must have been initialized through a call to flow_extract(). | |
788 | * 'used' is stored into stats->used. */ | |
789 | void | |
790 | dpif_flow_stats_extract(const struct flow *flow, const struct ofpbuf *packet, | |
791 | long long int used, struct dpif_flow_stats *stats) | |
792 | { | |
793 | stats->tcp_flags = ntohs(flow->tcp_flags); | |
794 | stats->n_bytes = ofpbuf_size(packet); | |
795 | stats->n_packets = 1; | |
796 | stats->used = used; | |
797 | } | |
798 | ||
799 | /* Appends a human-readable representation of 'stats' to 's'. */ | |
800 | void | |
801 | dpif_flow_stats_format(const struct dpif_flow_stats *stats, struct ds *s) | |
802 | { | |
803 | ds_put_format(s, "packets:%"PRIu64", bytes:%"PRIu64", used:", | |
804 | stats->n_packets, stats->n_bytes); | |
805 | if (stats->used) { | |
806 | ds_put_format(s, "%.3fs", (time_msec() - stats->used) / 1000.0); | |
807 | } else { | |
808 | ds_put_format(s, "never"); | |
809 | } | |
810 | if (stats->tcp_flags) { | |
811 | ds_put_cstr(s, ", flags:"); | |
812 | packet_format_tcp_flags(s, stats->tcp_flags); | |
813 | } | |
814 | } | |
815 | ||
816 | /* Deletes all flows from 'dpif'. Returns 0 if successful, otherwise a | |
817 | * positive errno value. */ | |
818 | int | |
819 | dpif_flow_flush(struct dpif *dpif) | |
820 | { | |
821 | int error; | |
822 | ||
823 | COVERAGE_INC(dpif_flow_flush); | |
824 | ||
825 | error = dpif->dpif_class->flow_flush(dpif); | |
826 | log_operation(dpif, "flow_flush", error); | |
827 | return error; | |
828 | } | |
829 | ||
830 | /* Queries 'dpif' for a flow entry. The flow is specified by the Netlink | |
831 | * attributes with types OVS_KEY_ATTR_* in the 'key_len' bytes starting at | |
832 | * 'key'. | |
833 | * | |
834 | * Returns 0 if successful. If no flow matches, returns ENOENT. On other | |
835 | * failure, returns a positive errno value. | |
836 | * | |
837 | * On success, '*bufp' will be set to an ofpbuf owned by the caller that | |
838 | * contains the response for 'flow->mask' and 'flow->actions'. The caller must | |
839 | * supply a valid pointer, and must free the ofpbuf (with ofpbuf_delete()) when | |
840 | * it is no longer needed. | |
841 | * | |
842 | * On success, 'flow' will be populated with the mask, actions and stats for | |
843 | * the datapath flow corresponding to 'key'. The mask and actions will point | |
844 | * within '*bufp'. | |
845 | * | |
846 | * Implementations may opt to point 'flow->mask' and/or 'flow->actions' at | |
847 | * RCU-protected data rather than making a copy of them. Therefore, callers | |
848 | * that wish to hold these over quiescent periods must make a copy of these | |
849 | * fields before quiescing. */ | |
850 | int | |
851 | dpif_flow_get(const struct dpif *dpif, | |
852 | const struct nlattr *key, size_t key_len, | |
853 | struct ofpbuf **bufp, struct dpif_flow *flow) | |
854 | { | |
855 | int error; | |
856 | struct nlattr *mask, *actions; | |
857 | size_t mask_len, actions_len; | |
858 | struct dpif_flow_stats stats; | |
859 | ||
860 | COVERAGE_INC(dpif_flow_get); | |
861 | ||
862 | *bufp = NULL; | |
863 | error = dpif->dpif_class->flow_get(dpif, key, key_len, bufp, | |
864 | &mask, &mask_len, | |
865 | &actions, &actions_len, &stats); | |
866 | if (error) { | |
867 | memset(flow, 0, sizeof *flow); | |
868 | ofpbuf_delete(*bufp); | |
869 | *bufp = NULL; | |
870 | } else { | |
871 | flow->mask = mask; | |
872 | flow->mask_len = mask_len; | |
873 | flow->actions = actions; | |
874 | flow->actions_len = actions_len; | |
875 | flow->stats = stats; | |
876 | } | |
877 | if (should_log_flow_message(error)) { | |
878 | log_flow_message(dpif, error, "flow_get", key, key_len, | |
879 | NULL, 0, &flow->stats, | |
880 | flow->actions, flow->actions_len); | |
881 | } | |
882 | return error; | |
883 | } | |
884 | ||
885 | static int | |
886 | dpif_flow_put__(struct dpif *dpif, const struct dpif_flow_put *put) | |
887 | { | |
888 | int error; | |
889 | ||
890 | COVERAGE_INC(dpif_flow_put); | |
891 | ovs_assert(!(put->flags & ~(DPIF_FP_CREATE | DPIF_FP_MODIFY | |
892 | | DPIF_FP_ZERO_STATS))); | |
893 | ||
894 | error = dpif->dpif_class->flow_put(dpif, put); | |
895 | if (error && put->stats) { | |
896 | memset(put->stats, 0, sizeof *put->stats); | |
897 | } | |
898 | log_flow_put_message(dpif, put, error); | |
899 | return error; | |
900 | } | |
901 | ||
902 | /* Adds or modifies a flow in 'dpif'. The flow is specified by the Netlink | |
903 | * attribute OVS_FLOW_ATTR_KEY with types OVS_KEY_ATTR_* in the 'key_len' bytes | |
904 | * starting at 'key', and OVS_FLOW_ATTR_MASK with types of OVS_KEY_ATTR_* in | |
905 | * the 'mask_len' bytes starting at 'mask'. The associated actions are | |
906 | * specified by the Netlink attributes with types OVS_ACTION_ATTR_* in the | |
907 | * 'actions_len' bytes starting at 'actions'. | |
908 | * | |
909 | * - If the flow's key does not exist in 'dpif', then the flow will be added if | |
910 | * 'flags' includes DPIF_FP_CREATE. Otherwise the operation will fail with | |
911 | * ENOENT. | |
912 | * | |
913 | * The datapath may reject attempts to insert overlapping flows with EINVAL | |
914 | * or EEXIST, but clients should not rely on this: avoiding overlapping flows | |
915 | * is primarily the client's responsibility. | |
916 | * | |
917 | * If the operation succeeds, then 'stats', if nonnull, will be zeroed. | |
918 | * | |
919 | * - If the flow's key does exist in 'dpif', then the flow's actions will be | |
920 | * updated if 'flags' includes DPIF_FP_MODIFY. Otherwise the operation will | |
921 | * fail with EEXIST. If the flow's actions are updated, then its statistics | |
922 | * will be zeroed if 'flags' includes DPIF_FP_ZERO_STATS, and left as-is | |
923 | * otherwise. | |
924 | * | |
925 | * If the operation succeeds, then 'stats', if nonnull, will be set to the | |
926 | * flow's statistics before the update. | |
927 | */ | |
928 | int | |
929 | dpif_flow_put(struct dpif *dpif, enum dpif_flow_put_flags flags, | |
930 | const struct nlattr *key, size_t key_len, | |
931 | const struct nlattr *mask, size_t mask_len, | |
932 | const struct nlattr *actions, size_t actions_len, | |
933 | struct dpif_flow_stats *stats) | |
934 | { | |
935 | struct dpif_flow_put put; | |
936 | ||
937 | put.flags = flags; | |
938 | put.key = key; | |
939 | put.key_len = key_len; | |
940 | put.mask = mask; | |
941 | put.mask_len = mask_len; | |
942 | put.actions = actions; | |
943 | put.actions_len = actions_len; | |
944 | put.stats = stats; | |
945 | return dpif_flow_put__(dpif, &put); | |
946 | } | |
947 | ||
948 | static int | |
949 | dpif_flow_del__(struct dpif *dpif, struct dpif_flow_del *del) | |
950 | { | |
951 | int error; | |
952 | ||
953 | COVERAGE_INC(dpif_flow_del); | |
954 | ||
955 | error = dpif->dpif_class->flow_del(dpif, del); | |
956 | if (error && del->stats) { | |
957 | memset(del->stats, 0, sizeof *del->stats); | |
958 | } | |
959 | log_flow_del_message(dpif, del, error); | |
960 | return error; | |
961 | } | |
962 | ||
963 | /* Deletes a flow from 'dpif' and returns 0, or returns ENOENT if 'dpif' does | |
964 | * not contain such a flow. The flow is specified by the Netlink attributes | |
965 | * with types OVS_KEY_ATTR_* in the 'key_len' bytes starting at 'key'. | |
966 | * | |
967 | * If the operation succeeds, then 'stats', if nonnull, will be set to the | |
968 | * flow's statistics before its deletion. */ | |
969 | int | |
970 | dpif_flow_del(struct dpif *dpif, | |
971 | const struct nlattr *key, size_t key_len, | |
972 | struct dpif_flow_stats *stats) | |
973 | { | |
974 | struct dpif_flow_del del; | |
975 | ||
976 | del.key = key; | |
977 | del.key_len = key_len; | |
978 | del.stats = stats; | |
979 | return dpif_flow_del__(dpif, &del); | |
980 | } | |
981 | ||
982 | /* Creates and returns a new 'struct dpif_flow_dump' for iterating through the | |
983 | * flows in 'dpif'. | |
984 | * | |
985 | * This function always successfully returns a dpif_flow_dump. Error | |
986 | * reporting is deferred to dpif_flow_dump_destroy(). */ | |
987 | struct dpif_flow_dump * | |
988 | dpif_flow_dump_create(const struct dpif *dpif) | |
989 | { | |
990 | return dpif->dpif_class->flow_dump_create(dpif); | |
991 | } | |
992 | ||
993 | /* Destroys 'dump', which must have been created with dpif_flow_dump_create(). | |
994 | * All dpif_flow_dump_thread structures previously created for 'dump' must | |
995 | * previously have been destroyed. | |
996 | * | |
997 | * Returns 0 if the dump operation was error-free, otherwise a positive errno | |
998 | * value describing the problem. */ | |
999 | int | |
1000 | dpif_flow_dump_destroy(struct dpif_flow_dump *dump) | |
1001 | { | |
1002 | const struct dpif *dpif = dump->dpif; | |
1003 | int error = dpif->dpif_class->flow_dump_destroy(dump); | |
1004 | log_operation(dpif, "flow_dump_destroy", error); | |
1005 | return error == EOF ? 0 : error; | |
1006 | } | |
1007 | ||
1008 | /* Returns new thread-local state for use with dpif_flow_dump_next(). */ | |
1009 | struct dpif_flow_dump_thread * | |
1010 | dpif_flow_dump_thread_create(struct dpif_flow_dump *dump) | |
1011 | { | |
1012 | return dump->dpif->dpif_class->flow_dump_thread_create(dump); | |
1013 | } | |
1014 | ||
1015 | /* Releases 'thread'. */ | |
1016 | void | |
1017 | dpif_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread) | |
1018 | { | |
1019 | thread->dpif->dpif_class->flow_dump_thread_destroy(thread); | |
1020 | } | |
1021 | ||
1022 | /* Attempts to retrieve up to 'max_flows' more flows from 'thread'. Returns 0 | |
1023 | * if and only if no flows remained to be retrieved, otherwise a positive | |
1024 | * number reflecting the number of elements in 'flows[]' that were updated. | |
1025 | * The number of flows returned might be less than 'max_flows' because | |
1026 | * fewer than 'max_flows' remained, because this particular datapath does not | |
1027 | * benefit from batching, or because an error occurred partway through | |
1028 | * retrieval. Thus, the caller should continue calling until a 0 return value, | |
1029 | * even if intermediate return values are less than 'max_flows'. | |
1030 | * | |
1031 | * No error status is immediately provided. An error status for the entire | |
1032 | * dump operation is provided when it is completed by calling | |
1033 | * dpif_flow_dump_destroy(). | |
1034 | * | |
1035 | * All of the data stored into 'flows' is owned by the datapath, not by the | |
1036 | * caller, and the caller must not modify or free it. The datapath guarantees | |
1037 | * that it remains accessible and unchanged until the first of: | |
1038 | * - The next call to dpif_flow_dump_next() for 'thread', or | |
1039 | * - The next rcu quiescent period. */ | |
1040 | int | |
1041 | dpif_flow_dump_next(struct dpif_flow_dump_thread *thread, | |
1042 | struct dpif_flow *flows, int max_flows) | |
1043 | { | |
1044 | struct dpif *dpif = thread->dpif; | |
1045 | int n; | |
1046 | ||
1047 | ovs_assert(max_flows > 0); | |
1048 | n = dpif->dpif_class->flow_dump_next(thread, flows, max_flows); | |
1049 | if (n > 0) { | |
1050 | struct dpif_flow *f; | |
1051 | ||
1052 | for (f = flows; f < &flows[n] && should_log_flow_message(0); f++) { | |
1053 | log_flow_message(dpif, 0, "flow_dump", | |
1054 | f->key, f->key_len, f->mask, f->mask_len, | |
1055 | &f->stats, f->actions, f->actions_len); | |
1056 | } | |
1057 | } else { | |
1058 | VLOG_DBG_RL(&dpmsg_rl, "%s: dumped all flows", dpif_name(dpif)); | |
1059 | } | |
1060 | return n; | |
1061 | } | |
1062 | ||
1063 | struct dpif_execute_helper_aux { | |
1064 | struct dpif *dpif; | |
1065 | int error; | |
1066 | }; | |
1067 | ||
1068 | /* This is called for actions that need the context of the datapath to be | |
1069 | * meaningful. */ | |
1070 | static void | |
1071 | dpif_execute_helper_cb(void *aux_, struct dpif_packet **packets, int cnt, | |
1072 | struct pkt_metadata *md, | |
1073 | const struct nlattr *action, bool may_steal OVS_UNUSED) | |
1074 | { | |
1075 | struct dpif_execute_helper_aux *aux = aux_; | |
1076 | int type = nl_attr_type(action); | |
1077 | struct ofpbuf * packet = &packets[0]->ofpbuf; | |
1078 | ||
1079 | ovs_assert(cnt == 1); | |
1080 | ||
1081 | switch ((enum ovs_action_attr)type) { | |
1082 | case OVS_ACTION_ATTR_OUTPUT: | |
1083 | case OVS_ACTION_ATTR_USERSPACE: | |
1084 | case OVS_ACTION_ATTR_RECIRC: { | |
1085 | struct dpif_execute execute; | |
1086 | struct ofpbuf execute_actions; | |
1087 | uint64_t stub[256 / 8]; | |
1088 | ||
1089 | if (md->tunnel.ip_dst) { | |
1090 | /* The Linux kernel datapath throws away the tunnel information | |
1091 | * that we supply as metadata. We have to use a "set" action to | |
1092 | * supply it. */ | |
1093 | ofpbuf_use_stub(&execute_actions, stub, sizeof stub); | |
1094 | odp_put_tunnel_action(&md->tunnel, &execute_actions); | |
1095 | ofpbuf_put(&execute_actions, action, NLA_ALIGN(action->nla_len)); | |
1096 | ||
1097 | execute.actions = ofpbuf_data(&execute_actions); | |
1098 | execute.actions_len = ofpbuf_size(&execute_actions); | |
1099 | } else { | |
1100 | execute.actions = action; | |
1101 | execute.actions_len = NLA_ALIGN(action->nla_len); | |
1102 | } | |
1103 | ||
1104 | execute.packet = packet; | |
1105 | execute.md = *md; | |
1106 | execute.needs_help = false; | |
1107 | aux->error = aux->dpif->dpif_class->execute(aux->dpif, &execute); | |
1108 | ||
1109 | log_execute_message(aux->dpif, &execute, true, aux->error); | |
1110 | ||
1111 | if (md->tunnel.ip_dst) { | |
1112 | ofpbuf_uninit(&execute_actions); | |
1113 | } | |
1114 | break; | |
1115 | } | |
1116 | ||
1117 | case OVS_ACTION_ATTR_HASH: | |
1118 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
1119 | case OVS_ACTION_ATTR_POP_VLAN: | |
1120 | case OVS_ACTION_ATTR_PUSH_MPLS: | |
1121 | case OVS_ACTION_ATTR_POP_MPLS: | |
1122 | case OVS_ACTION_ATTR_SET: | |
1123 | case OVS_ACTION_ATTR_SAMPLE: | |
1124 | case OVS_ACTION_ATTR_UNSPEC: | |
1125 | case __OVS_ACTION_ATTR_MAX: | |
1126 | OVS_NOT_REACHED(); | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | /* Executes 'execute' by performing most of the actions in userspace and | |
1131 | * passing the fully constructed packets to 'dpif' for output and userspace | |
1132 | * actions. | |
1133 | * | |
1134 | * This helps with actions that a given 'dpif' doesn't implement directly. */ | |
1135 | static int | |
1136 | dpif_execute_with_help(struct dpif *dpif, struct dpif_execute *execute) | |
1137 | { | |
1138 | struct dpif_execute_helper_aux aux = {dpif, 0}; | |
1139 | struct dpif_packet packet, *pp; | |
1140 | ||
1141 | COVERAGE_INC(dpif_execute_with_help); | |
1142 | ||
1143 | packet.ofpbuf = *execute->packet; | |
1144 | pp = &packet; | |
1145 | ||
1146 | odp_execute_actions(&aux, &pp, 1, false, &execute->md, execute->actions, | |
1147 | execute->actions_len, dpif_execute_helper_cb); | |
1148 | ||
1149 | /* Even though may_steal is set to false, some actions could modify or | |
1150 | * reallocate the ofpbuf memory. We need to pass those changes to the | |
1151 | * caller */ | |
1152 | *execute->packet = packet.ofpbuf; | |
1153 | ||
1154 | return aux.error; | |
1155 | } | |
1156 | ||
1157 | /* Returns true if the datapath needs help executing 'execute'. */ | |
1158 | static bool | |
1159 | dpif_execute_needs_help(const struct dpif_execute *execute) | |
1160 | { | |
1161 | return execute->needs_help || nl_attr_oversized(execute->actions_len); | |
1162 | } | |
1163 | ||
1164 | /* Causes 'dpif' to perform the 'execute->actions_len' bytes of actions in | |
1165 | * 'execute->actions' on the Ethernet frame in 'execute->packet' and on packet | |
1166 | * metadata in 'execute->md'. The implementation is allowed to modify both the | |
1167 | * '*execute->packet' and 'execute->md'. | |
1168 | * | |
1169 | * Some dpif providers do not implement every action. The Linux kernel | |
1170 | * datapath, in particular, does not implement ARP field modification. If | |
1171 | * 'needs_help' is true, the dpif layer executes in userspace all of the | |
1172 | * actions that it can, and for OVS_ACTION_ATTR_OUTPUT and | |
1173 | * OVS_ACTION_ATTR_USERSPACE actions it passes the packet through to the dpif | |
1174 | * implementation. | |
1175 | * | |
1176 | * This works even if 'execute->actions_len' is too long for a Netlink | |
1177 | * attribute. | |
1178 | * | |
1179 | * Returns 0 if successful, otherwise a positive errno value. */ | |
1180 | int | |
1181 | dpif_execute(struct dpif *dpif, struct dpif_execute *execute) | |
1182 | { | |
1183 | int error; | |
1184 | ||
1185 | COVERAGE_INC(dpif_execute); | |
1186 | if (execute->actions_len > 0) { | |
1187 | error = (dpif_execute_needs_help(execute) | |
1188 | ? dpif_execute_with_help(dpif, execute) | |
1189 | : dpif->dpif_class->execute(dpif, execute)); | |
1190 | } else { | |
1191 | error = 0; | |
1192 | } | |
1193 | ||
1194 | log_execute_message(dpif, execute, false, error); | |
1195 | ||
1196 | return error; | |
1197 | } | |
1198 | ||
1199 | /* Executes each of the 'n_ops' operations in 'ops' on 'dpif', in the order in | |
1200 | * which they are specified, placing each operation's results in the "output" | |
1201 | * members documented in comments. | |
1202 | * | |
1203 | * This function exists because some datapaths can perform batched operations | |
1204 | * faster than individual operations. */ | |
1205 | void | |
1206 | dpif_operate(struct dpif *dpif, struct dpif_op **ops, size_t n_ops) | |
1207 | { | |
1208 | if (dpif->dpif_class->operate) { | |
1209 | while (n_ops > 0) { | |
1210 | size_t chunk; | |
1211 | ||
1212 | /* Count 'chunk', the number of ops that can be executed without | |
1213 | * needing any help. Ops that need help should be rare, so we | |
1214 | * expect this to ordinarily be 'n_ops', that is, all the ops. */ | |
1215 | for (chunk = 0; chunk < n_ops; chunk++) { | |
1216 | struct dpif_op *op = ops[chunk]; | |
1217 | ||
1218 | if (op->type == DPIF_OP_EXECUTE | |
1219 | && dpif_execute_needs_help(&op->u.execute)) { | |
1220 | break; | |
1221 | } | |
1222 | } | |
1223 | ||
1224 | if (chunk) { | |
1225 | /* Execute a chunk full of ops that the dpif provider can | |
1226 | * handle itself, without help. */ | |
1227 | size_t i; | |
1228 | ||
1229 | dpif->dpif_class->operate(dpif, ops, chunk); | |
1230 | ||
1231 | for (i = 0; i < chunk; i++) { | |
1232 | struct dpif_op *op = ops[i]; | |
1233 | ||
1234 | switch (op->type) { | |
1235 | case DPIF_OP_FLOW_PUT: | |
1236 | log_flow_put_message(dpif, &op->u.flow_put, op->error); | |
1237 | break; | |
1238 | ||
1239 | case DPIF_OP_FLOW_DEL: | |
1240 | log_flow_del_message(dpif, &op->u.flow_del, op->error); | |
1241 | break; | |
1242 | ||
1243 | case DPIF_OP_EXECUTE: | |
1244 | log_execute_message(dpif, &op->u.execute, false, | |
1245 | op->error); | |
1246 | break; | |
1247 | } | |
1248 | } | |
1249 | ||
1250 | ops += chunk; | |
1251 | n_ops -= chunk; | |
1252 | } else { | |
1253 | /* Help the dpif provider to execute one op. */ | |
1254 | struct dpif_op *op = ops[0]; | |
1255 | ||
1256 | op->error = dpif_execute(dpif, &op->u.execute); | |
1257 | ops++; | |
1258 | n_ops--; | |
1259 | } | |
1260 | } | |
1261 | } else { | |
1262 | size_t i; | |
1263 | ||
1264 | for (i = 0; i < n_ops; i++) { | |
1265 | struct dpif_op *op = ops[i]; | |
1266 | ||
1267 | switch (op->type) { | |
1268 | case DPIF_OP_FLOW_PUT: | |
1269 | op->error = dpif_flow_put__(dpif, &op->u.flow_put); | |
1270 | break; | |
1271 | ||
1272 | case DPIF_OP_FLOW_DEL: | |
1273 | op->error = dpif_flow_del__(dpif, &op->u.flow_del); | |
1274 | break; | |
1275 | ||
1276 | case DPIF_OP_EXECUTE: | |
1277 | op->error = dpif_execute(dpif, &op->u.execute); | |
1278 | break; | |
1279 | ||
1280 | default: | |
1281 | OVS_NOT_REACHED(); | |
1282 | } | |
1283 | } | |
1284 | } | |
1285 | } | |
1286 | ||
1287 | /* Returns a string that represents 'type', for use in log messages. */ | |
1288 | const char * | |
1289 | dpif_upcall_type_to_string(enum dpif_upcall_type type) | |
1290 | { | |
1291 | switch (type) { | |
1292 | case DPIF_UC_MISS: return "miss"; | |
1293 | case DPIF_UC_ACTION: return "action"; | |
1294 | case DPIF_N_UC_TYPES: default: return "<unknown>"; | |
1295 | } | |
1296 | } | |
1297 | ||
1298 | /* Enables or disables receiving packets with dpif_recv() on 'dpif'. Returns 0 | |
1299 | * if successful, otherwise a positive errno value. | |
1300 | * | |
1301 | * Turning packet receive off and then back on may change the Netlink PID | |
1302 | * assignments returned by dpif_port_get_pid(). If the client does this, it | |
1303 | * must update all of the flows that have OVS_ACTION_ATTR_USERSPACE actions | |
1304 | * using the new PID assignment. */ | |
1305 | int | |
1306 | dpif_recv_set(struct dpif *dpif, bool enable) | |
1307 | { | |
1308 | int error = 0; | |
1309 | ||
1310 | if (dpif->dpif_class->recv_set) { | |
1311 | error = dpif->dpif_class->recv_set(dpif, enable); | |
1312 | log_operation(dpif, "recv_set", error); | |
1313 | } | |
1314 | return error; | |
1315 | } | |
1316 | ||
1317 | /* Refreshes the poll loops and Netlink sockets associated to each port, | |
1318 | * when the number of upcall handlers (upcall receiving thread) is changed | |
1319 | * to 'n_handlers' and receiving packets for 'dpif' is enabled by | |
1320 | * recv_set(). | |
1321 | * | |
1322 | * Since multiple upcall handlers can read upcalls simultaneously from | |
1323 | * 'dpif', each port can have multiple Netlink sockets, one per upcall | |
1324 | * handler. So, handlers_set() is responsible for the following tasks: | |
1325 | * | |
1326 | * When receiving upcall is enabled, extends or creates the | |
1327 | * configuration to support: | |
1328 | * | |
1329 | * - 'n_handlers' Netlink sockets for each port. | |
1330 | * | |
1331 | * - 'n_handlers' poll loops, one for each upcall handler. | |
1332 | * | |
1333 | * - registering the Netlink sockets for the same upcall handler to | |
1334 | * the corresponding poll loop. | |
1335 | * | |
1336 | * Returns 0 if successful, otherwise a positive errno value. */ | |
1337 | int | |
1338 | dpif_handlers_set(struct dpif *dpif, uint32_t n_handlers) | |
1339 | { | |
1340 | int error = 0; | |
1341 | ||
1342 | if (dpif->dpif_class->handlers_set) { | |
1343 | error = dpif->dpif_class->handlers_set(dpif, n_handlers); | |
1344 | log_operation(dpif, "handlers_set", error); | |
1345 | } | |
1346 | return error; | |
1347 | } | |
1348 | ||
1349 | void | |
1350 | dpif_register_upcall_cb(struct dpif *dpif, exec_upcall_cb *cb) | |
1351 | { | |
1352 | if (dpif->dpif_class->register_upcall_cb) { | |
1353 | dpif->dpif_class->register_upcall_cb(dpif, cb); | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | void | |
1358 | dpif_enable_upcall(struct dpif *dpif) | |
1359 | { | |
1360 | if (dpif->dpif_class->enable_upcall) { | |
1361 | dpif->dpif_class->enable_upcall(dpif); | |
1362 | } | |
1363 | } | |
1364 | ||
1365 | void | |
1366 | dpif_disable_upcall(struct dpif *dpif) | |
1367 | { | |
1368 | if (dpif->dpif_class->disable_upcall) { | |
1369 | dpif->dpif_class->disable_upcall(dpif); | |
1370 | } | |
1371 | } | |
1372 | ||
1373 | void | |
1374 | dpif_print_packet(struct dpif *dpif, struct dpif_upcall *upcall) | |
1375 | { | |
1376 | if (!VLOG_DROP_DBG(&dpmsg_rl)) { | |
1377 | struct ds flow; | |
1378 | char *packet; | |
1379 | ||
1380 | packet = ofp_packet_to_string(ofpbuf_data(&upcall->packet), | |
1381 | ofpbuf_size(&upcall->packet)); | |
1382 | ||
1383 | ds_init(&flow); | |
1384 | odp_flow_key_format(upcall->key, upcall->key_len, &flow); | |
1385 | ||
1386 | VLOG_DBG("%s: %s upcall:\n%s\n%s", | |
1387 | dpif_name(dpif), dpif_upcall_type_to_string(upcall->type), | |
1388 | ds_cstr(&flow), packet); | |
1389 | ||
1390 | ds_destroy(&flow); | |
1391 | free(packet); | |
1392 | } | |
1393 | } | |
1394 | ||
1395 | /* Polls for an upcall from 'dpif' for an upcall handler. Since there | |
1396 | * there can be multiple poll loops, 'handler_id' is needed as index to | |
1397 | * identify the corresponding poll loop. If successful, stores the upcall | |
1398 | * into '*upcall', using 'buf' for storage. Should only be called if | |
1399 | * 'recv_set' has been used to enable receiving packets from 'dpif'. | |
1400 | * | |
1401 | * 'upcall->key' and 'upcall->userdata' point into data in the caller-provided | |
1402 | * 'buf', so their memory cannot be freed separately from 'buf'. | |
1403 | * | |
1404 | * The caller owns the data of 'upcall->packet' and may modify it. If | |
1405 | * packet's headroom is exhausted as it is manipulated, 'upcall->packet' | |
1406 | * will be reallocated. This requires the data of 'upcall->packet' to be | |
1407 | * released with ofpbuf_uninit() before 'upcall' is destroyed. However, | |
1408 | * when an error is returned, the 'upcall->packet' may be uninitialized | |
1409 | * and should not be released. | |
1410 | * | |
1411 | * Returns 0 if successful, otherwise a positive errno value. Returns EAGAIN | |
1412 | * if no upcall is immediately available. */ | |
1413 | int | |
1414 | dpif_recv(struct dpif *dpif, uint32_t handler_id, struct dpif_upcall *upcall, | |
1415 | struct ofpbuf *buf) | |
1416 | { | |
1417 | int error = EAGAIN; | |
1418 | ||
1419 | if (dpif->dpif_class->recv) { | |
1420 | error = dpif->dpif_class->recv(dpif, handler_id, upcall, buf); | |
1421 | if (!error) { | |
1422 | dpif_print_packet(dpif, upcall); | |
1423 | } else if (error != EAGAIN) { | |
1424 | log_operation(dpif, "recv", error); | |
1425 | } | |
1426 | } | |
1427 | return error; | |
1428 | } | |
1429 | ||
1430 | /* Discards all messages that would otherwise be received by dpif_recv() on | |
1431 | * 'dpif'. */ | |
1432 | void | |
1433 | dpif_recv_purge(struct dpif *dpif) | |
1434 | { | |
1435 | COVERAGE_INC(dpif_purge); | |
1436 | if (dpif->dpif_class->recv_purge) { | |
1437 | dpif->dpif_class->recv_purge(dpif); | |
1438 | } | |
1439 | } | |
1440 | ||
1441 | /* Arranges for the poll loop for an upcall handler to wake up when 'dpif' | |
1442 | * 'dpif' has a message queued to be received with the recv member | |
1443 | * function. Since there can be multiple poll loops, 'handler_id' is | |
1444 | * needed as index to identify the corresponding poll loop. */ | |
1445 | void | |
1446 | dpif_recv_wait(struct dpif *dpif, uint32_t handler_id) | |
1447 | { | |
1448 | if (dpif->dpif_class->recv_wait) { | |
1449 | dpif->dpif_class->recv_wait(dpif, handler_id); | |
1450 | } | |
1451 | } | |
1452 | ||
1453 | /* Obtains the NetFlow engine type and engine ID for 'dpif' into '*engine_type' | |
1454 | * and '*engine_id', respectively. */ | |
1455 | void | |
1456 | dpif_get_netflow_ids(const struct dpif *dpif, | |
1457 | uint8_t *engine_type, uint8_t *engine_id) | |
1458 | { | |
1459 | *engine_type = dpif->netflow_engine_type; | |
1460 | *engine_id = dpif->netflow_engine_id; | |
1461 | } | |
1462 | ||
1463 | /* Translates OpenFlow queue ID 'queue_id' (in host byte order) into a priority | |
1464 | * value used for setting packet priority. | |
1465 | * On success, returns 0 and stores the priority into '*priority'. | |
1466 | * On failure, returns a positive errno value and stores 0 into '*priority'. */ | |
1467 | int | |
1468 | dpif_queue_to_priority(const struct dpif *dpif, uint32_t queue_id, | |
1469 | uint32_t *priority) | |
1470 | { | |
1471 | int error = (dpif->dpif_class->queue_to_priority | |
1472 | ? dpif->dpif_class->queue_to_priority(dpif, queue_id, | |
1473 | priority) | |
1474 | : EOPNOTSUPP); | |
1475 | if (error) { | |
1476 | *priority = 0; | |
1477 | } | |
1478 | log_operation(dpif, "queue_to_priority", error); | |
1479 | return error; | |
1480 | } | |
1481 | \f | |
1482 | void | |
1483 | dpif_init(struct dpif *dpif, const struct dpif_class *dpif_class, | |
1484 | const char *name, | |
1485 | uint8_t netflow_engine_type, uint8_t netflow_engine_id) | |
1486 | { | |
1487 | dpif->dpif_class = dpif_class; | |
1488 | dpif->base_name = xstrdup(name); | |
1489 | dpif->full_name = xasprintf("%s@%s", dpif_class->type, name); | |
1490 | dpif->netflow_engine_type = netflow_engine_type; | |
1491 | dpif->netflow_engine_id = netflow_engine_id; | |
1492 | } | |
1493 | ||
1494 | /* Undoes the results of initialization. | |
1495 | * | |
1496 | * Normally this function only needs to be called from dpif_close(). | |
1497 | * However, it may be called by providers due to an error on opening | |
1498 | * that occurs after initialization. It this case dpif_close() would | |
1499 | * never be called. */ | |
1500 | void | |
1501 | dpif_uninit(struct dpif *dpif, bool close) | |
1502 | { | |
1503 | char *base_name = dpif->base_name; | |
1504 | char *full_name = dpif->full_name; | |
1505 | ||
1506 | if (close) { | |
1507 | dpif->dpif_class->close(dpif); | |
1508 | } | |
1509 | ||
1510 | free(base_name); | |
1511 | free(full_name); | |
1512 | } | |
1513 | \f | |
1514 | static void | |
1515 | log_operation(const struct dpif *dpif, const char *operation, int error) | |
1516 | { | |
1517 | if (!error) { | |
1518 | VLOG_DBG_RL(&dpmsg_rl, "%s: %s success", dpif_name(dpif), operation); | |
1519 | } else if (ofperr_is_valid(error)) { | |
1520 | VLOG_WARN_RL(&error_rl, "%s: %s failed (%s)", | |
1521 | dpif_name(dpif), operation, ofperr_get_name(error)); | |
1522 | } else { | |
1523 | VLOG_WARN_RL(&error_rl, "%s: %s failed (%s)", | |
1524 | dpif_name(dpif), operation, ovs_strerror(error)); | |
1525 | } | |
1526 | } | |
1527 | ||
1528 | static enum vlog_level | |
1529 | flow_message_log_level(int error) | |
1530 | { | |
1531 | /* If flows arrive in a batch, userspace may push down multiple | |
1532 | * unique flow definitions that overlap when wildcards are applied. | |
1533 | * Kernels that support flow wildcarding will reject these flows as | |
1534 | * duplicates (EEXIST), so lower the log level to debug for these | |
1535 | * types of messages. */ | |
1536 | return (error && error != EEXIST) ? VLL_WARN : VLL_DBG; | |
1537 | } | |
1538 | ||
1539 | static bool | |
1540 | should_log_flow_message(int error) | |
1541 | { | |
1542 | return !vlog_should_drop(THIS_MODULE, flow_message_log_level(error), | |
1543 | error ? &error_rl : &dpmsg_rl); | |
1544 | } | |
1545 | ||
1546 | static void | |
1547 | log_flow_message(const struct dpif *dpif, int error, const char *operation, | |
1548 | const struct nlattr *key, size_t key_len, | |
1549 | const struct nlattr *mask, size_t mask_len, | |
1550 | const struct dpif_flow_stats *stats, | |
1551 | const struct nlattr *actions, size_t actions_len) | |
1552 | { | |
1553 | struct ds ds = DS_EMPTY_INITIALIZER; | |
1554 | ds_put_format(&ds, "%s: ", dpif_name(dpif)); | |
1555 | if (error) { | |
1556 | ds_put_cstr(&ds, "failed to "); | |
1557 | } | |
1558 | ds_put_format(&ds, "%s ", operation); | |
1559 | if (error) { | |
1560 | ds_put_format(&ds, "(%s) ", ovs_strerror(error)); | |
1561 | } | |
1562 | odp_flow_format(key, key_len, mask, mask_len, NULL, &ds, true); | |
1563 | if (stats) { | |
1564 | ds_put_cstr(&ds, ", "); | |
1565 | dpif_flow_stats_format(stats, &ds); | |
1566 | } | |
1567 | if (actions || actions_len) { | |
1568 | ds_put_cstr(&ds, ", actions:"); | |
1569 | format_odp_actions(&ds, actions, actions_len); | |
1570 | } | |
1571 | vlog(THIS_MODULE, flow_message_log_level(error), "%s", ds_cstr(&ds)); | |
1572 | ds_destroy(&ds); | |
1573 | } | |
1574 | ||
1575 | static void | |
1576 | log_flow_put_message(struct dpif *dpif, const struct dpif_flow_put *put, | |
1577 | int error) | |
1578 | { | |
1579 | if (should_log_flow_message(error)) { | |
1580 | struct ds s; | |
1581 | ||
1582 | ds_init(&s); | |
1583 | ds_put_cstr(&s, "put"); | |
1584 | if (put->flags & DPIF_FP_CREATE) { | |
1585 | ds_put_cstr(&s, "[create]"); | |
1586 | } | |
1587 | if (put->flags & DPIF_FP_MODIFY) { | |
1588 | ds_put_cstr(&s, "[modify]"); | |
1589 | } | |
1590 | if (put->flags & DPIF_FP_ZERO_STATS) { | |
1591 | ds_put_cstr(&s, "[zero]"); | |
1592 | } | |
1593 | log_flow_message(dpif, error, ds_cstr(&s), | |
1594 | put->key, put->key_len, put->mask, put->mask_len, | |
1595 | put->stats, put->actions, put->actions_len); | |
1596 | ds_destroy(&s); | |
1597 | } | |
1598 | } | |
1599 | ||
1600 | static void | |
1601 | log_flow_del_message(struct dpif *dpif, const struct dpif_flow_del *del, | |
1602 | int error) | |
1603 | { | |
1604 | if (should_log_flow_message(error)) { | |
1605 | log_flow_message(dpif, error, "flow_del", del->key, del->key_len, | |
1606 | NULL, 0, !error ? del->stats : NULL, NULL, 0); | |
1607 | } | |
1608 | } | |
1609 | ||
1610 | /* Logs that 'execute' was executed on 'dpif' and completed with errno 'error' | |
1611 | * (0 for success). 'subexecute' should be true if the execution is a result | |
1612 | * of breaking down a larger execution that needed help, false otherwise. | |
1613 | * | |
1614 | * | |
1615 | * XXX In theory, the log message could be deceptive because this function is | |
1616 | * called after the dpif_provider's '->execute' function, which is allowed to | |
1617 | * modify execute->packet and execute->md. In practice, though: | |
1618 | * | |
1619 | * - dpif-linux doesn't modify execute->packet or execute->md. | |
1620 | * | |
1621 | * - dpif-netdev does modify them but it is less likely to have problems | |
1622 | * because it is built into ovs-vswitchd and cannot have version skew, | |
1623 | * etc. | |
1624 | * | |
1625 | * It would still be better to avoid the potential problem. I don't know of a | |
1626 | * good way to do that, though, that isn't expensive. */ | |
1627 | static void | |
1628 | log_execute_message(struct dpif *dpif, const struct dpif_execute *execute, | |
1629 | bool subexecute, int error) | |
1630 | { | |
1631 | if (!(error ? VLOG_DROP_WARN(&error_rl) : VLOG_DROP_DBG(&dpmsg_rl))) { | |
1632 | struct ds ds = DS_EMPTY_INITIALIZER; | |
1633 | char *packet; | |
1634 | ||
1635 | packet = ofp_packet_to_string(ofpbuf_data(execute->packet), | |
1636 | ofpbuf_size(execute->packet)); | |
1637 | ds_put_format(&ds, "%s: %sexecute ", | |
1638 | dpif_name(dpif), | |
1639 | (subexecute ? "sub-" | |
1640 | : dpif_execute_needs_help(execute) ? "super-" | |
1641 | : "")); | |
1642 | format_odp_actions(&ds, execute->actions, execute->actions_len); | |
1643 | if (error) { | |
1644 | ds_put_format(&ds, " failed (%s)", ovs_strerror(error)); | |
1645 | } | |
1646 | ds_put_format(&ds, " on packet %s", packet); | |
1647 | vlog(THIS_MODULE, error ? VLL_WARN : VLL_DBG, "%s", ds_cstr(&ds)); | |
1648 | ds_destroy(&ds); | |
1649 | free(packet); | |
1650 | } | |
1651 | } |