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064af421 | 1 | /* |
f915f1a8 | 2 | * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks. |
064af421 | 3 | * |
a14bc59f BP |
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: | |
064af421 | 7 | * |
a14bc59f BP |
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. | |
064af421 BP |
15 | */ |
16 | ||
17 | #include <config.h> | |
18 | #include "netdev.h" | |
19 | ||
20 | #include <assert.h> | |
21 | #include <errno.h> | |
064af421 | 22 | #include <inttypes.h> |
064af421 BP |
23 | #include <netinet/in.h> |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | #include <unistd.h> | |
27 | ||
28 | #include "coverage.h" | |
29 | #include "dynamic-string.h" | |
30 | #include "fatal-signal.h" | |
149f577a | 31 | #include "hash.h" |
064af421 | 32 | #include "list.h" |
8b61709d | 33 | #include "netdev-provider.h" |
2b9d6589 | 34 | #include "netdev-vport.h" |
064af421 | 35 | #include "ofpbuf.h" |
622ee2cf | 36 | #include "openflow/openflow.h" |
064af421 BP |
37 | #include "packets.h" |
38 | #include "poll-loop.h" | |
e9e28be3 | 39 | #include "shash.h" |
b3c01ed3 | 40 | #include "sset.h" |
064af421 | 41 | #include "svec.h" |
064af421 BP |
42 | #include "vlog.h" |
43 | ||
d98e6007 | 44 | VLOG_DEFINE_THIS_MODULE(netdev); |
5136ce49 | 45 | |
d76f09ea BP |
46 | COVERAGE_DEFINE(netdev_received); |
47 | COVERAGE_DEFINE(netdev_sent); | |
48 | COVERAGE_DEFINE(netdev_add_router); | |
49 | COVERAGE_DEFINE(netdev_get_stats); | |
50 | ||
77909859 | 51 | static struct shash netdev_classes = SHASH_INITIALIZER(&netdev_classes); |
064af421 | 52 | |
6c88d577 | 53 | /* All created network devices. */ |
149f577a | 54 | static struct shash netdev_dev_shash = SHASH_INITIALIZER(&netdev_dev_shash); |
6c88d577 | 55 | |
064af421 BP |
56 | /* All open network devices. */ |
57 | static struct list netdev_list = LIST_INITIALIZER(&netdev_list); | |
58 | ||
064af421 BP |
59 | /* This is set pretty low because we probably won't learn anything from the |
60 | * additional log messages. */ | |
61 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20); | |
62 | ||
c69ee87c | 63 | static void close_all_netdevs(void *aux OVS_UNUSED); |
064af421 | 64 | static int restore_flags(struct netdev *netdev); |
0f4f4a61 | 65 | void update_device_args(struct netdev_dev *, const struct shash *args); |
8b61709d | 66 | |
77909859 | 67 | static void |
8b61709d | 68 | netdev_initialize(void) |
064af421 | 69 | { |
2b9d6589 | 70 | static bool inited; |
e3830e90 | 71 | |
2b9d6589 BP |
72 | if (!inited) { |
73 | inited = true; | |
8b61709d | 74 | |
e3830e90 | 75 | fatal_signal_add_hook(close_all_netdevs, NULL, NULL, true); |
064af421 | 76 | |
2b9d6589 BP |
77 | #ifdef HAVE_NETLINK |
78 | netdev_register_provider(&netdev_linux_class); | |
c3827f61 | 79 | netdev_register_provider(&netdev_internal_class); |
2b9d6589 BP |
80 | netdev_register_provider(&netdev_tap_class); |
81 | netdev_vport_register(); | |
82 | #endif | |
064af421 | 83 | } |
064af421 BP |
84 | } |
85 | ||
8b61709d BP |
86 | /* Performs periodic work needed by all the various kinds of netdevs. |
87 | * | |
88 | * If your program opens any netdevs, it must call this function within its | |
89 | * main poll loop. */ | |
90 | void | |
91 | netdev_run(void) | |
064af421 | 92 | { |
77909859 JG |
93 | struct shash_node *node; |
94 | SHASH_FOR_EACH(node, &netdev_classes) { | |
7dab847a JG |
95 | const struct netdev_class *netdev_class = node->data; |
96 | if (netdev_class->run) { | |
97 | netdev_class->run(); | |
064af421 | 98 | } |
064af421 BP |
99 | } |
100 | } | |
101 | ||
8b61709d BP |
102 | /* Arranges for poll_block() to wake up when netdev_run() needs to be called. |
103 | * | |
104 | * If your program opens any netdevs, it must call this function within its | |
105 | * main poll loop. */ | |
106 | void | |
107 | netdev_wait(void) | |
064af421 | 108 | { |
77909859 JG |
109 | struct shash_node *node; |
110 | SHASH_FOR_EACH(node, &netdev_classes) { | |
7dab847a JG |
111 | const struct netdev_class *netdev_class = node->data; |
112 | if (netdev_class->wait) { | |
113 | netdev_class->wait(); | |
8b61709d | 114 | } |
064af421 | 115 | } |
064af421 BP |
116 | } |
117 | ||
77909859 JG |
118 | /* Initializes and registers a new netdev provider. After successful |
119 | * registration, new netdevs of that type can be opened using netdev_open(). */ | |
120 | int | |
121 | netdev_register_provider(const struct netdev_class *new_class) | |
122 | { | |
77909859 JG |
123 | if (shash_find(&netdev_classes, new_class->type)) { |
124 | VLOG_WARN("attempted to register duplicate netdev provider: %s", | |
125 | new_class->type); | |
126 | return EEXIST; | |
127 | } | |
128 | ||
129 | if (new_class->init) { | |
130 | int error = new_class->init(); | |
131 | if (error) { | |
132 | VLOG_ERR("failed to initialize %s network device class: %s", | |
133 | new_class->type, strerror(error)); | |
134 | return error; | |
135 | } | |
136 | } | |
137 | ||
2b9d6589 | 138 | shash_add(&netdev_classes, new_class->type, new_class); |
77909859 JG |
139 | |
140 | return 0; | |
141 | } | |
142 | ||
143 | /* Unregisters a netdev provider. 'type' must have been previously | |
144 | * registered and not currently be in use by any netdevs. After unregistration | |
145 | * new netdevs of that type cannot be opened using netdev_open(). */ | |
146 | int | |
147 | netdev_unregister_provider(const char *type) | |
148 | { | |
149 | struct shash_node *del_node, *netdev_dev_node; | |
150 | ||
151 | del_node = shash_find(&netdev_classes, type); | |
152 | if (!del_node) { | |
153 | VLOG_WARN("attempted to unregister a netdev provider that is not " | |
154 | "registered: %s", type); | |
155 | return EAFNOSUPPORT; | |
156 | } | |
157 | ||
158 | SHASH_FOR_EACH(netdev_dev_node, &netdev_dev_shash) { | |
159 | struct netdev_dev *netdev_dev = netdev_dev_node->data; | |
a4af0040 | 160 | if (!strcmp(netdev_dev->netdev_class->type, type)) { |
77909859 JG |
161 | VLOG_WARN("attempted to unregister in use netdev provider: %s", |
162 | type); | |
163 | return EBUSY; | |
164 | } | |
165 | } | |
166 | ||
167 | shash_delete(&netdev_classes, del_node); | |
77909859 JG |
168 | |
169 | return 0; | |
170 | } | |
171 | ||
c3827f61 BP |
172 | const struct netdev_class * |
173 | netdev_lookup_provider(const char *type) | |
174 | { | |
175 | netdev_initialize(); | |
176 | return shash_find_data(&netdev_classes, type && type[0] ? type : "system"); | |
177 | } | |
178 | ||
77909859 | 179 | /* Clears 'types' and enumerates the types of all currently registered netdev |
19993ef3 | 180 | * providers into it. The caller must first initialize the sset. */ |
77909859 | 181 | void |
19993ef3 | 182 | netdev_enumerate_types(struct sset *types) |
77909859 JG |
183 | { |
184 | struct shash_node *node; | |
185 | ||
186 | netdev_initialize(); | |
19993ef3 | 187 | sset_clear(types); |
77909859 JG |
188 | |
189 | SHASH_FOR_EACH(node, &netdev_classes) { | |
190 | const struct netdev_class *netdev_class = node->data; | |
19993ef3 | 191 | sset_add(types, netdev_class->type); |
77909859 JG |
192 | } |
193 | } | |
194 | ||
18812dff BP |
195 | /* Opens the network device named 'name' (e.g. "eth0") of the specified 'type' |
196 | * (e.g. "system") and returns zero if successful, otherwise a positive errno | |
197 | * value. On success, sets '*netdevp' to the new network device, otherwise to | |
198 | * null. | |
064af421 | 199 | * |
de5cdb90 BP |
200 | * Some network devices may need to be configured (with netdev_set_config()) |
201 | * before they can be used. */ | |
064af421 | 202 | int |
18812dff | 203 | netdev_open(const char *name, const char *type, struct netdev **netdevp) |
064af421 | 204 | { |
149f577a | 205 | struct netdev_dev *netdev_dev; |
064af421 | 206 | int error; |
064af421 | 207 | |
149f577a | 208 | *netdevp = NULL; |
559843ed | 209 | netdev_initialize(); |
6c88d577 | 210 | |
18812dff | 211 | netdev_dev = shash_find_data(&netdev_dev_shash, name); |
149f577a JG |
212 | |
213 | if (!netdev_dev) { | |
c3827f61 BP |
214 | const struct netdev_class *class; |
215 | ||
18812dff | 216 | class = netdev_lookup_provider(type); |
c3827f61 BP |
217 | if (!class) { |
218 | VLOG_WARN("could not create netdev %s of unknown type %s", | |
18812dff | 219 | name, type); |
c3827f61 BP |
220 | return EAFNOSUPPORT; |
221 | } | |
18812dff | 222 | error = class->create(class, name, &netdev_dev); |
149f577a JG |
223 | if (error) { |
224 | return error; | |
225 | } | |
c3827f61 | 226 | assert(netdev_dev->netdev_class == class); |
149f577a | 227 | |
064af421 | 228 | } |
149f577a | 229 | |
7b6b0ef4 | 230 | error = netdev_dev->netdev_class->open(netdev_dev, netdevp); |
149f577a | 231 | |
6c88d577 | 232 | if (!error) { |
149f577a JG |
233 | netdev_dev->ref_cnt++; |
234 | } else { | |
235 | if (!netdev_dev->ref_cnt) { | |
236 | netdev_dev_uninit(netdev_dev, true); | |
237 | } | |
6c88d577 | 238 | } |
064af421 | 239 | |
064af421 BP |
240 | return error; |
241 | } | |
242 | ||
149f577a JG |
243 | /* Reconfigures the device 'netdev' with 'args'. 'args' may be empty |
244 | * or NULL if none are needed. */ | |
245 | int | |
6d9e6eb4 | 246 | netdev_set_config(struct netdev *netdev, const struct shash *args) |
149f577a | 247 | { |
149f577a JG |
248 | struct netdev_dev *netdev_dev = netdev_get_dev(netdev); |
249 | ||
6d9e6eb4 | 250 | if (netdev_dev->netdev_class->set_config) { |
de5cdb90 BP |
251 | struct shash no_args = SHASH_INITIALIZER(&no_args); |
252 | return netdev_dev->netdev_class->set_config(netdev_dev, | |
253 | args ? args : &no_args); | |
254 | } else if (args && !shash_is_empty(args)) { | |
255 | VLOG_WARN("%s: arguments provided to device that is not configurable", | |
256 | netdev_get_name(netdev)); | |
149f577a JG |
257 | } |
258 | ||
259 | return 0; | |
260 | } | |
261 | ||
de5cdb90 BP |
262 | /* Returns the current configuration for 'netdev' in 'args'. The caller must |
263 | * have already initialized 'args' with shash_init(). Returns 0 on success, in | |
264 | * which case 'args' will be filled with 'netdev''s configuration. On failure | |
265 | * returns a positive errno value, in which case 'args' will be empty. | |
6d9e6eb4 | 266 | * |
de5cdb90 BP |
267 | * The caller owns 'args' and its contents and must eventually free them with |
268 | * shash_destroy_free_data(). */ | |
269 | int | |
270 | netdev_get_config(const struct netdev *netdev, struct shash *args) | |
6d9e6eb4 | 271 | { |
de5cdb90 BP |
272 | struct netdev_dev *netdev_dev = netdev_get_dev(netdev); |
273 | int error; | |
274 | ||
275 | shash_clear_free_data(args); | |
276 | if (netdev_dev->netdev_class->get_config) { | |
277 | error = netdev_dev->netdev_class->get_config(netdev_dev, args); | |
278 | if (error) { | |
279 | shash_clear_free_data(args); | |
280 | } | |
281 | } else { | |
282 | error = 0; | |
283 | } | |
284 | ||
285 | return error; | |
6d9e6eb4 BP |
286 | } |
287 | ||
064af421 BP |
288 | /* Closes and destroys 'netdev'. */ |
289 | void | |
290 | netdev_close(struct netdev *netdev) | |
291 | { | |
292 | if (netdev) { | |
149f577a | 293 | struct netdev_dev *netdev_dev = netdev_get_dev(netdev); |
6c88d577 | 294 | |
149f577a JG |
295 | assert(netdev_dev->ref_cnt); |
296 | netdev_dev->ref_cnt--; | |
297 | netdev_uninit(netdev, true); | |
6c88d577 | 298 | |
149f577a JG |
299 | /* If the reference count for the netdev device is zero, destroy it. */ |
300 | if (!netdev_dev->ref_cnt) { | |
301 | netdev_dev_uninit(netdev_dev, true); | |
064af421 | 302 | } |
064af421 BP |
303 | } |
304 | } | |
305 | ||
8b61709d BP |
306 | /* Returns true if a network device named 'name' exists and may be opened, |
307 | * otherwise false. */ | |
5bfc0cd3 BP |
308 | bool |
309 | netdev_exists(const char *name) | |
310 | { | |
8b61709d | 311 | struct netdev *netdev; |
5bfc0cd3 BP |
312 | int error; |
313 | ||
18812dff | 314 | error = netdev_open(name, "system", &netdev); |
8b61709d BP |
315 | if (!error) { |
316 | netdev_close(netdev); | |
317 | return true; | |
318 | } else { | |
319 | if (error != ENODEV) { | |
320 | VLOG_WARN("failed to open network device %s: %s", | |
321 | name, strerror(error)); | |
322 | } | |
323 | return false; | |
324 | } | |
5bfc0cd3 BP |
325 | } |
326 | ||
fdd82248 JG |
327 | /* Returns true if a network device named 'name' is currently opened, |
328 | * otherwise false. */ | |
329 | bool | |
330 | netdev_is_open(const char *name) | |
331 | { | |
332 | return !!shash_find_data(&netdev_dev_shash, name); | |
333 | } | |
334 | ||
19993ef3 | 335 | /* Clears 'sset' and enumerates the names of all known network devices. */ |
8b61709d | 336 | int |
19993ef3 | 337 | netdev_enumerate(struct sset *sset) |
064af421 | 338 | { |
77909859 JG |
339 | struct shash_node *node; |
340 | int error = 0; | |
8b61709d | 341 | |
559843ed | 342 | netdev_initialize(); |
19993ef3 | 343 | sset_clear(sset); |
8b61709d | 344 | |
77909859 JG |
345 | SHASH_FOR_EACH(node, &netdev_classes) { |
346 | const struct netdev_class *netdev_class = node->data; | |
347 | if (netdev_class->enumerate) { | |
19993ef3 | 348 | int retval = netdev_class->enumerate(sset); |
8b61709d BP |
349 | if (retval) { |
350 | VLOG_WARN("failed to enumerate %s network devices: %s", | |
77909859 | 351 | netdev_class->type, strerror(retval)); |
8b61709d BP |
352 | if (!error) { |
353 | error = retval; | |
354 | } | |
355 | } | |
356 | } | |
357 | } | |
77909859 | 358 | |
8b61709d | 359 | return error; |
064af421 BP |
360 | } |
361 | ||
a75531e5 BP |
362 | /* Parses 'netdev_name_', which is of the form [type@]name into its component |
363 | * pieces. 'name' and 'type' must be freed by the caller. */ | |
364 | void | |
365 | netdev_parse_name(const char *netdev_name_, char **name, char **type) | |
366 | { | |
367 | char *netdev_name = xstrdup(netdev_name_); | |
368 | char *separator; | |
369 | ||
370 | separator = strchr(netdev_name, '@'); | |
371 | if (separator) { | |
372 | *separator = '\0'; | |
373 | *type = netdev_name; | |
374 | *name = xstrdup(separator + 1); | |
375 | } else { | |
376 | *name = netdev_name; | |
377 | *type = xstrdup("system"); | |
378 | } | |
379 | } | |
380 | ||
7b6b0ef4 BP |
381 | /* Attempts to set up 'netdev' for receiving packets with netdev_recv(). |
382 | * Returns 0 if successful, otherwise a positive errno value. EOPNOTSUPP | |
383 | * indicates that the network device does not implement packet reception | |
384 | * through this interface. */ | |
385 | int | |
386 | netdev_listen(struct netdev *netdev) | |
387 | { | |
388 | int (*listen)(struct netdev *); | |
389 | ||
390 | listen = netdev_get_dev(netdev)->netdev_class->listen; | |
391 | return listen ? (listen)(netdev) : EOPNOTSUPP; | |
392 | } | |
393 | ||
064af421 BP |
394 | /* Attempts to receive a packet from 'netdev' into 'buffer', which the caller |
395 | * must have initialized with sufficient room for the packet. The space | |
396 | * required to receive any packet is ETH_HEADER_LEN bytes, plus VLAN_HEADER_LEN | |
397 | * bytes, plus the device's MTU (which may be retrieved via netdev_get_mtu()). | |
398 | * (Some devices do not allow for a VLAN header, in which case VLAN_HEADER_LEN | |
399 | * need not be included.) | |
400 | * | |
7b6b0ef4 BP |
401 | * This function can only be expected to return a packet if ->listen() has |
402 | * been called successfully. | |
403 | * | |
064af421 BP |
404 | * If a packet is successfully retrieved, returns 0. In this case 'buffer' is |
405 | * guaranteed to contain at least ETH_TOTAL_MIN bytes. Otherwise, returns a | |
406 | * positive errno value. Returns EAGAIN immediately if no packet is ready to | |
407 | * be returned. | |
1ac98180 BP |
408 | * |
409 | * Some network devices may not implement support for this function. In such | |
c1fdab01 | 410 | * cases this function will always return EOPNOTSUPP. */ |
064af421 BP |
411 | int |
412 | netdev_recv(struct netdev *netdev, struct ofpbuf *buffer) | |
413 | { | |
1ac98180 | 414 | int (*recv)(struct netdev *, void *, size_t); |
8b61709d | 415 | int retval; |
064af421 BP |
416 | |
417 | assert(buffer->size == 0); | |
418 | assert(ofpbuf_tailroom(buffer) >= ETH_TOTAL_MIN); | |
8b61709d | 419 | |
1ac98180 BP |
420 | recv = netdev_get_dev(netdev)->netdev_class->recv; |
421 | retval = (recv | |
422 | ? (recv)(netdev, buffer->data, ofpbuf_tailroom(buffer)) | |
423 | : -EOPNOTSUPP); | |
8b61709d | 424 | if (retval >= 0) { |
064af421 | 425 | COVERAGE_INC(netdev_received); |
8b61709d BP |
426 | buffer->size += retval; |
427 | if (buffer->size < ETH_TOTAL_MIN) { | |
428 | ofpbuf_put_zeros(buffer, ETH_TOTAL_MIN - buffer->size); | |
429 | } | |
064af421 | 430 | return 0; |
8b61709d BP |
431 | } else { |
432 | return -retval; | |
064af421 BP |
433 | } |
434 | } | |
435 | ||
436 | /* Registers with the poll loop to wake up from the next call to poll_block() | |
437 | * when a packet is ready to be received with netdev_recv() on 'netdev'. */ | |
438 | void | |
439 | netdev_recv_wait(struct netdev *netdev) | |
440 | { | |
1ac98180 BP |
441 | void (*recv_wait)(struct netdev *); |
442 | ||
443 | recv_wait = netdev_get_dev(netdev)->netdev_class->recv_wait; | |
444 | if (recv_wait) { | |
445 | recv_wait(netdev); | |
446 | } | |
064af421 BP |
447 | } |
448 | ||
449 | /* Discards all packets waiting to be received from 'netdev'. */ | |
450 | int | |
451 | netdev_drain(struct netdev *netdev) | |
452 | { | |
1ac98180 BP |
453 | int (*drain)(struct netdev *); |
454 | ||
455 | drain = netdev_get_dev(netdev)->netdev_class->drain; | |
456 | return drain ? drain(netdev) : 0; | |
064af421 BP |
457 | } |
458 | ||
459 | /* Sends 'buffer' on 'netdev'. Returns 0 if successful, otherwise a positive | |
460 | * errno value. Returns EAGAIN without blocking if the packet cannot be queued | |
461 | * immediately. Returns EMSGSIZE if a partial packet was transmitted or if | |
462 | * the packet is too big or too small to transmit on the device. | |
463 | * | |
464 | * The caller retains ownership of 'buffer' in all cases. | |
465 | * | |
466 | * The kernel maintains a packet transmission queue, so the caller is not | |
1ac98180 BP |
467 | * expected to do additional queuing of packets. |
468 | * | |
469 | * Some network devices may not implement support for this function. In such | |
470 | * cases this function will always return EOPNOTSUPP. */ | |
064af421 BP |
471 | int |
472 | netdev_send(struct netdev *netdev, const struct ofpbuf *buffer) | |
473 | { | |
1ac98180 BP |
474 | int (*send)(struct netdev *, const void *, size_t); |
475 | int error; | |
476 | ||
477 | send = netdev_get_dev(netdev)->netdev_class->send; | |
478 | error = send ? (send)(netdev, buffer->data, buffer->size) : EOPNOTSUPP; | |
8b61709d | 479 | if (!error) { |
064af421 | 480 | COVERAGE_INC(netdev_sent); |
064af421 | 481 | } |
8b61709d | 482 | return error; |
064af421 BP |
483 | } |
484 | ||
485 | /* Registers with the poll loop to wake up from the next call to poll_block() | |
486 | * when the packet transmission queue has sufficient room to transmit a packet | |
487 | * with netdev_send(). | |
488 | * | |
489 | * The kernel maintains a packet transmission queue, so the client is not | |
490 | * expected to do additional queuing of packets. Thus, this function is | |
491 | * unlikely to ever be used. It is included for completeness. */ | |
492 | void | |
493 | netdev_send_wait(struct netdev *netdev) | |
494 | { | |
1ac98180 BP |
495 | void (*send_wait)(struct netdev *); |
496 | ||
497 | send_wait = netdev_get_dev(netdev)->netdev_class->send_wait; | |
498 | if (send_wait) { | |
499 | send_wait(netdev); | |
500 | } | |
064af421 BP |
501 | } |
502 | ||
503 | /* Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful, | |
504 | * otherwise a positive errno value. */ | |
505 | int | |
506 | netdev_set_etheraddr(struct netdev *netdev, const uint8_t mac[ETH_ADDR_LEN]) | |
507 | { | |
a4af0040 | 508 | return netdev_get_dev(netdev)->netdev_class->set_etheraddr(netdev, mac); |
064af421 BP |
509 | } |
510 | ||
80992a35 BP |
511 | /* Retrieves 'netdev''s MAC address. If successful, returns 0 and copies the |
512 | * the MAC address into 'mac'. On failure, returns a positive errno value and | |
513 | * clears 'mac' to all-zeros. */ | |
514 | int | |
515 | netdev_get_etheraddr(const struct netdev *netdev, uint8_t mac[ETH_ADDR_LEN]) | |
064af421 | 516 | { |
a4af0040 | 517 | return netdev_get_dev(netdev)->netdev_class->get_etheraddr(netdev, mac); |
064af421 BP |
518 | } |
519 | ||
520 | /* Returns the name of the network device that 'netdev' represents, | |
521 | * e.g. "eth0". The caller must not modify or free the returned string. */ | |
522 | const char * | |
523 | netdev_get_name(const struct netdev *netdev) | |
524 | { | |
149f577a | 525 | return netdev_get_dev(netdev)->name; |
064af421 BP |
526 | } |
527 | ||
3d222126 BP |
528 | /* Retrieves the MTU of 'netdev'. The MTU is the maximum size of transmitted |
529 | * (and received) packets, in bytes, not including the hardware header; thus, | |
530 | * this is typically 1500 bytes for Ethernet devices. | |
531 | * | |
9b020780 PS |
532 | * If successful, returns 0 and stores the MTU size in '*mtup'. Returns |
533 | * EOPNOTSUPP if 'netdev' does not have an MTU (as e.g. some tunnels do not). | |
14622f22 BP |
534 | * On other failure, returns a positive errno value. On failure, sets '*mtup' |
535 | * to 0. */ | |
064af421 | 536 | int |
3d222126 | 537 | netdev_get_mtu(const struct netdev *netdev, int *mtup) |
064af421 | 538 | { |
14622f22 BP |
539 | const struct netdev_class *class = netdev_get_dev(netdev)->netdev_class; |
540 | int error; | |
541 | ||
542 | error = class->get_mtu ? class->get_mtu(netdev, mtup) : EOPNOTSUPP; | |
543 | if (error) { | |
544 | *mtup = 0; | |
545 | if (error != EOPNOTSUPP) { | |
546 | VLOG_WARN_RL(&rl, "failed to retrieve MTU for network device %s: " | |
547 | "%s", netdev_get_name(netdev), strerror(error)); | |
548 | } | |
8b61709d BP |
549 | } |
550 | return error; | |
064af421 BP |
551 | } |
552 | ||
9b020780 PS |
553 | /* Sets the MTU of 'netdev'. The MTU is the maximum size of transmitted |
554 | * (and received) packets, in bytes. | |
555 | * | |
556 | * If successful, returns 0. Returns EOPNOTSUPP if 'netdev' does not have an | |
557 | * MTU (as e.g. some tunnels do not). On other failure, returns a positive | |
558 | * errno value. */ | |
559 | int | |
560 | netdev_set_mtu(const struct netdev *netdev, int mtu) | |
561 | { | |
14622f22 BP |
562 | const struct netdev_class *class = netdev_get_dev(netdev)->netdev_class; |
563 | int error; | |
9b020780 | 564 | |
14622f22 | 565 | error = class->set_mtu ? class->set_mtu(netdev, mtu) : EOPNOTSUPP; |
9b020780 PS |
566 | if (error && error != EOPNOTSUPP) { |
567 | VLOG_WARN_RL(&rl, "failed to retrieve MTU for network device %s: %s", | |
568 | netdev_get_name(netdev), strerror(error)); | |
569 | } | |
570 | ||
571 | return error; | |
572 | } | |
573 | ||
9ab3d9a3 BP |
574 | /* Returns the ifindex of 'netdev', if successful, as a positive number. On |
575 | * failure, returns a negative errno value. | |
576 | * | |
577 | * The desired semantics of the ifindex value are a combination of those | |
578 | * specified by POSIX for if_nametoindex() and by SNMP for ifIndex. An ifindex | |
579 | * value should be unique within a host and remain stable at least until | |
580 | * reboot. SNMP says an ifindex "ranges between 1 and the value of ifNumber" | |
581 | * but many systems do not follow this rule anyhow. | |
4c0f1780 JG |
582 | * |
583 | * Some network devices may not implement support for this function. In such | |
584 | * cases this function will always return -EOPNOTSUPP. | |
9ab3d9a3 BP |
585 | */ |
586 | int | |
587 | netdev_get_ifindex(const struct netdev *netdev) | |
588 | { | |
4c0f1780 JG |
589 | int (*get_ifindex)(const struct netdev *); |
590 | ||
591 | get_ifindex = netdev_get_dev(netdev)->netdev_class->get_ifindex; | |
592 | ||
593 | return get_ifindex ? get_ifindex(netdev) : -EOPNOTSUPP; | |
9ab3d9a3 BP |
594 | } |
595 | ||
064af421 BP |
596 | /* Stores the features supported by 'netdev' into each of '*current', |
597 | * '*advertised', '*supported', and '*peer' that are non-null. Each value is a | |
598 | * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if | |
599 | * successful, otherwise a positive errno value. On failure, all of the | |
4c0f1780 JG |
600 | * passed-in values are set to 0. |
601 | * | |
602 | * Some network devices may not implement support for this function. In such | |
c1fdab01 | 603 | * cases this function will always return EOPNOTSUPP. */ |
064af421 | 604 | int |
6f2f5cce | 605 | netdev_get_features(const struct netdev *netdev, |
064af421 BP |
606 | uint32_t *current, uint32_t *advertised, |
607 | uint32_t *supported, uint32_t *peer) | |
608 | { | |
6f2f5cce | 609 | int (*get_features)(const struct netdev *netdev, |
4c0f1780 JG |
610 | uint32_t *current, uint32_t *advertised, |
611 | uint32_t *supported, uint32_t *peer); | |
064af421 | 612 | uint32_t dummy[4]; |
7671589a BP |
613 | int error; |
614 | ||
615 | if (!current) { | |
616 | current = &dummy[0]; | |
617 | } | |
618 | if (!advertised) { | |
619 | advertised = &dummy[1]; | |
620 | } | |
621 | if (!supported) { | |
622 | supported = &dummy[2]; | |
623 | } | |
624 | if (!peer) { | |
625 | peer = &dummy[3]; | |
626 | } | |
627 | ||
4c0f1780 JG |
628 | get_features = netdev_get_dev(netdev)->netdev_class->get_features; |
629 | error = get_features | |
630 | ? get_features(netdev, current, advertised, supported, peer) | |
631 | : EOPNOTSUPP; | |
7671589a BP |
632 | if (error) { |
633 | *current = *advertised = *supported = *peer = 0; | |
634 | } | |
635 | return error; | |
064af421 BP |
636 | } |
637 | ||
622ee2cf BP |
638 | /* Returns the maximum speed of a network connection that has the "enum |
639 | * ofp_port_features" bits in 'features', in bits per second. If no bits that | |
640 | * indicate a speed are set in 'features', assumes 100Mbps. */ | |
641 | uint64_t | |
642 | netdev_features_to_bps(uint32_t features) | |
643 | { | |
644 | enum { | |
645 | F_10000MB = OFPPF_10GB_FD, | |
646 | F_1000MB = OFPPF_1GB_HD | OFPPF_1GB_FD, | |
647 | F_100MB = OFPPF_100MB_HD | OFPPF_100MB_FD, | |
648 | F_10MB = OFPPF_10MB_HD | OFPPF_10MB_FD | |
649 | }; | |
650 | ||
651 | return ( features & F_10000MB ? UINT64_C(10000000000) | |
652 | : features & F_1000MB ? UINT64_C(1000000000) | |
653 | : features & F_100MB ? UINT64_C(100000000) | |
654 | : features & F_10MB ? UINT64_C(10000000) | |
655 | : UINT64_C(100000000)); | |
656 | } | |
657 | ||
658 | /* Returns true if any of the "enum ofp_port_features" bits that indicate a | |
659 | * full-duplex link are set in 'features', otherwise false. */ | |
660 | bool | |
661 | netdev_features_is_full_duplex(uint32_t features) | |
662 | { | |
663 | return (features & (OFPPF_10MB_FD | OFPPF_100MB_FD | OFPPF_1GB_FD | |
664 | | OFPPF_10GB_FD)) != 0; | |
665 | } | |
666 | ||
8b61709d BP |
667 | /* Set the features advertised by 'netdev' to 'advertise'. Returns 0 if |
668 | * successful, otherwise a positive errno value. */ | |
064af421 BP |
669 | int |
670 | netdev_set_advertisements(struct netdev *netdev, uint32_t advertise) | |
671 | { | |
a4af0040 JP |
672 | return (netdev_get_dev(netdev)->netdev_class->set_advertisements |
673 | ? netdev_get_dev(netdev)->netdev_class->set_advertisements( | |
674 | netdev, advertise) | |
8b61709d | 675 | : EOPNOTSUPP); |
064af421 BP |
676 | } |
677 | ||
f1acd62b BP |
678 | /* If 'netdev' has an assigned IPv4 address, sets '*address' to that address |
679 | * and '*netmask' to its netmask and returns 0. Otherwise, returns a positive | |
680 | * errno value and sets '*address' to 0 (INADDR_ANY). | |
8b61709d BP |
681 | * |
682 | * The following error values have well-defined meanings: | |
683 | * | |
684 | * - EADDRNOTAVAIL: 'netdev' has no assigned IPv4 address. | |
685 | * | |
686 | * - EOPNOTSUPP: No IPv4 network stack attached to 'netdev'. | |
687 | * | |
b53055f4 | 688 | * 'address' or 'netmask' or both may be null, in which case the address or |
c1fdab01 | 689 | * netmask is not reported. */ |
6b9bd979 | 690 | int |
f1acd62b BP |
691 | netdev_get_in4(const struct netdev *netdev, |
692 | struct in_addr *address_, struct in_addr *netmask_) | |
064af421 | 693 | { |
f1acd62b BP |
694 | struct in_addr address; |
695 | struct in_addr netmask; | |
064af421 BP |
696 | int error; |
697 | ||
a4af0040 | 698 | error = (netdev_get_dev(netdev)->netdev_class->get_in4 |
d295e8e9 | 699 | ? netdev_get_dev(netdev)->netdev_class->get_in4(netdev, |
a4af0040 | 700 | &address, &netmask) |
8b61709d | 701 | : EOPNOTSUPP); |
f1acd62b BP |
702 | if (address_) { |
703 | address_->s_addr = error ? 0 : address.s_addr; | |
704 | } | |
705 | if (netmask_) { | |
706 | netmask_->s_addr = error ? 0 : netmask.s_addr; | |
064af421 BP |
707 | } |
708 | return error; | |
709 | } | |
710 | ||
711 | /* Assigns 'addr' as 'netdev''s IPv4 address and 'mask' as its netmask. If | |
712 | * 'addr' is INADDR_ANY, 'netdev''s IPv4 address is cleared. Returns a | |
713 | * positive errno value. */ | |
714 | int | |
715 | netdev_set_in4(struct netdev *netdev, struct in_addr addr, struct in_addr mask) | |
716 | { | |
a4af0040 JP |
717 | return (netdev_get_dev(netdev)->netdev_class->set_in4 |
718 | ? netdev_get_dev(netdev)->netdev_class->set_in4(netdev, addr, mask) | |
8b61709d | 719 | : EOPNOTSUPP); |
064af421 BP |
720 | } |
721 | ||
0efaf4b5 BP |
722 | /* Adds 'router' as a default IP gateway for the TCP/IP stack that corresponds |
723 | * to 'netdev'. */ | |
064af421 | 724 | int |
8b61709d | 725 | netdev_add_router(struct netdev *netdev, struct in_addr router) |
064af421 | 726 | { |
064af421 | 727 | COVERAGE_INC(netdev_add_router); |
a4af0040 JP |
728 | return (netdev_get_dev(netdev)->netdev_class->add_router |
729 | ? netdev_get_dev(netdev)->netdev_class->add_router(netdev, router) | |
8b61709d | 730 | : EOPNOTSUPP); |
064af421 BP |
731 | } |
732 | ||
f1acd62b BP |
733 | /* Looks up the next hop for 'host' for the TCP/IP stack that corresponds to |
734 | * 'netdev'. If a route cannot not be determined, sets '*next_hop' to 0, | |
735 | * '*netdev_name' to null, and returns a positive errno value. Otherwise, if a | |
736 | * next hop is found, stores the next hop gateway's address (0 if 'host' is on | |
737 | * a directly connected network) in '*next_hop' and a copy of the name of the | |
738 | * device to reach 'host' in '*netdev_name', and returns 0. The caller is | |
739 | * responsible for freeing '*netdev_name' (by calling free()). */ | |
740 | int | |
741 | netdev_get_next_hop(const struct netdev *netdev, | |
742 | const struct in_addr *host, struct in_addr *next_hop, | |
743 | char **netdev_name) | |
744 | { | |
a4af0040 JP |
745 | int error = (netdev_get_dev(netdev)->netdev_class->get_next_hop |
746 | ? netdev_get_dev(netdev)->netdev_class->get_next_hop( | |
747 | host, next_hop, netdev_name) | |
f1acd62b | 748 | : EOPNOTSUPP); |
064af421 | 749 | if (error) { |
f1acd62b BP |
750 | next_hop->s_addr = 0; |
751 | *netdev_name = NULL; | |
064af421 BP |
752 | } |
753 | return error; | |
754 | } | |
755 | ||
ea763e0e EJ |
756 | /* Populates 'sh' with status information. |
757 | * | |
758 | * Populates 'sh' with 'netdev' specific status information. This information | |
759 | * may be used to populate the status column of the Interface table as defined | |
760 | * in ovs-vswitchd.conf.db(5). */ | |
761 | int | |
762 | netdev_get_status(const struct netdev *netdev, struct shash *sh) | |
ea83a2fc EJ |
763 | { |
764 | struct netdev_dev *dev = netdev_get_dev(netdev); | |
765 | ||
ea763e0e EJ |
766 | return (dev->netdev_class->get_status |
767 | ? dev->netdev_class->get_status(netdev, sh) | |
768 | : EOPNOTSUPP); | |
ea83a2fc EJ |
769 | } |
770 | ||
8b61709d BP |
771 | /* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address and |
772 | * returns 0. Otherwise, returns a positive errno value and sets '*in6' to | |
773 | * all-zero-bits (in6addr_any). | |
774 | * | |
775 | * The following error values have well-defined meanings: | |
776 | * | |
777 | * - EADDRNOTAVAIL: 'netdev' has no assigned IPv6 address. | |
778 | * | |
779 | * - EOPNOTSUPP: No IPv6 network stack attached to 'netdev'. | |
780 | * | |
781 | * 'in6' may be null, in which case the address itself is not reported. */ | |
064af421 | 782 | int |
8b61709d | 783 | netdev_get_in6(const struct netdev *netdev, struct in6_addr *in6) |
064af421 | 784 | { |
8b61709d BP |
785 | struct in6_addr dummy; |
786 | int error; | |
b1bf7d43 | 787 | |
a4af0040 | 788 | error = (netdev_get_dev(netdev)->netdev_class->get_in6 |
d295e8e9 | 789 | ? netdev_get_dev(netdev)->netdev_class->get_in6(netdev, |
a4af0040 | 790 | in6 ? in6 : &dummy) |
8b61709d BP |
791 | : EOPNOTSUPP); |
792 | if (error && in6) { | |
793 | memset(in6, 0, sizeof *in6); | |
b1bf7d43 | 794 | } |
8b61709d | 795 | return error; |
064af421 BP |
796 | } |
797 | ||
798 | /* On 'netdev', turns off the flags in 'off' and then turns on the flags in | |
799 | * 'on'. If 'permanent' is true, the changes will persist; otherwise, they | |
800 | * will be reverted when 'netdev' is closed or the program exits. Returns 0 if | |
801 | * successful, otherwise a positive errno value. */ | |
802 | static int | |
803 | do_update_flags(struct netdev *netdev, enum netdev_flags off, | |
8b61709d BP |
804 | enum netdev_flags on, enum netdev_flags *old_flagsp, |
805 | bool permanent) | |
064af421 | 806 | { |
8b61709d | 807 | enum netdev_flags old_flags; |
064af421 BP |
808 | int error; |
809 | ||
d295e8e9 | 810 | error = netdev_get_dev(netdev)->netdev_class->update_flags(netdev, |
a4af0040 | 811 | off & ~on, on, &old_flags); |
064af421 | 812 | if (error) { |
8b61709d BP |
813 | VLOG_WARN_RL(&rl, "failed to %s flags for network device %s: %s", |
814 | off || on ? "set" : "get", netdev_get_name(netdev), | |
815 | strerror(error)); | |
816 | old_flags = 0; | |
817 | } else if ((off || on) && !permanent) { | |
818 | enum netdev_flags new_flags = (old_flags & ~off) | on; | |
819 | enum netdev_flags changed_flags = old_flags ^ new_flags; | |
820 | if (changed_flags) { | |
821 | if (!netdev->changed_flags) { | |
822 | netdev->save_flags = old_flags; | |
823 | } | |
824 | netdev->changed_flags |= changed_flags; | |
825 | } | |
064af421 | 826 | } |
8b61709d BP |
827 | if (old_flagsp) { |
828 | *old_flagsp = old_flags; | |
064af421 BP |
829 | } |
830 | return error; | |
831 | } | |
832 | ||
8b61709d BP |
833 | /* Obtains the current flags for 'netdev' and stores them into '*flagsp'. |
834 | * Returns 0 if successful, otherwise a positive errno value. On failure, | |
835 | * stores 0 into '*flagsp'. */ | |
836 | int | |
837 | netdev_get_flags(const struct netdev *netdev_, enum netdev_flags *flagsp) | |
838 | { | |
839 | struct netdev *netdev = (struct netdev *) netdev_; | |
840 | return do_update_flags(netdev, 0, 0, flagsp, false); | |
841 | } | |
842 | ||
064af421 BP |
843 | /* Sets the flags for 'netdev' to 'flags'. |
844 | * If 'permanent' is true, the changes will persist; otherwise, they | |
845 | * will be reverted when 'netdev' is closed or the program exits. | |
846 | * Returns 0 if successful, otherwise a positive errno value. */ | |
847 | int | |
848 | netdev_set_flags(struct netdev *netdev, enum netdev_flags flags, | |
849 | bool permanent) | |
850 | { | |
8b61709d | 851 | return do_update_flags(netdev, -1, flags, NULL, permanent); |
064af421 BP |
852 | } |
853 | ||
854 | /* Turns on the specified 'flags' on 'netdev'. | |
855 | * If 'permanent' is true, the changes will persist; otherwise, they | |
856 | * will be reverted when 'netdev' is closed or the program exits. | |
857 | * Returns 0 if successful, otherwise a positive errno value. */ | |
858 | int | |
859 | netdev_turn_flags_on(struct netdev *netdev, enum netdev_flags flags, | |
860 | bool permanent) | |
861 | { | |
8b61709d | 862 | return do_update_flags(netdev, 0, flags, NULL, permanent); |
064af421 BP |
863 | } |
864 | ||
865 | /* Turns off the specified 'flags' on 'netdev'. | |
866 | * If 'permanent' is true, the changes will persist; otherwise, they | |
867 | * will be reverted when 'netdev' is closed or the program exits. | |
868 | * Returns 0 if successful, otherwise a positive errno value. */ | |
869 | int | |
870 | netdev_turn_flags_off(struct netdev *netdev, enum netdev_flags flags, | |
871 | bool permanent) | |
872 | { | |
8b61709d | 873 | return do_update_flags(netdev, flags, 0, NULL, permanent); |
064af421 BP |
874 | } |
875 | ||
876 | /* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be | |
877 | * successfully retrieved, it stores the corresponding MAC address in 'mac' and | |
878 | * returns 0. Otherwise, it returns a positive errno value; in particular, | |
8b61709d | 879 | * ENXIO indicates that there is no ARP table entry for 'ip' on 'netdev'. */ |
064af421 | 880 | int |
8b61709d | 881 | netdev_arp_lookup(const struct netdev *netdev, |
dbba996b | 882 | ovs_be32 ip, uint8_t mac[ETH_ADDR_LEN]) |
064af421 | 883 | { |
a4af0040 | 884 | int error = (netdev_get_dev(netdev)->netdev_class->arp_lookup |
d295e8e9 | 885 | ? netdev_get_dev(netdev)->netdev_class->arp_lookup(netdev, |
a4af0040 | 886 | ip, mac) |
8b61709d | 887 | : EOPNOTSUPP); |
064af421 | 888 | if (error) { |
8b61709d | 889 | memset(mac, 0, ETH_ADDR_LEN); |
064af421 | 890 | } |
8b61709d | 891 | return error; |
064af421 BP |
892 | } |
893 | ||
85da620e JG |
894 | /* Returns true if carrier is active (link light is on) on 'netdev'. */ |
895 | bool | |
896 | netdev_get_carrier(const struct netdev *netdev) | |
064af421 | 897 | { |
85da620e JG |
898 | int error; |
899 | enum netdev_flags flags; | |
900 | bool carrier; | |
901 | ||
902 | netdev_get_flags(netdev, &flags); | |
903 | if (!(flags & NETDEV_UP)) { | |
904 | return false; | |
905 | } | |
906 | ||
907 | if (!netdev_get_dev(netdev)->netdev_class->get_carrier) { | |
908 | return true; | |
909 | } | |
910 | ||
911 | error = netdev_get_dev(netdev)->netdev_class->get_carrier(netdev, | |
912 | &carrier); | |
8b61709d | 913 | if (error) { |
85da620e JG |
914 | VLOG_DBG("%s: failed to get network device carrier status, assuming " |
915 | "down: %s", netdev_get_name(netdev), strerror(error)); | |
916 | carrier = false; | |
064af421 | 917 | } |
85da620e JG |
918 | |
919 | return carrier; | |
064af421 BP |
920 | } |
921 | ||
1670c579 EJ |
922 | /* Attempts to force netdev_get_carrier() to poll 'netdev''s MII registers for |
923 | * link status instead of checking 'netdev''s carrier. 'netdev''s MII | |
924 | * registers will be polled once ever 'interval' milliseconds. If 'netdev' | |
925 | * does not support MII, another method may be used as a fallback. If | |
926 | * 'interval' is less than or equal to zero, reverts netdev_get_carrier() to | |
927 | * its normal behavior. | |
928 | * | |
929 | * Returns 0 if successful, otherwise a positive errno value. */ | |
930 | int | |
931 | netdev_set_miimon_interval(struct netdev *netdev, long long int interval) | |
63331829 | 932 | { |
1670c579 EJ |
933 | struct netdev_dev *netdev_dev = netdev_get_dev(netdev); |
934 | return (netdev_dev->netdev_class->set_miimon_interval | |
935 | ? netdev_dev->netdev_class->set_miimon_interval(netdev, interval) | |
936 | : EOPNOTSUPP); | |
63331829 EJ |
937 | } |
938 | ||
887fd0ba | 939 | /* Retrieves current device stats for 'netdev'. */ |
064af421 BP |
940 | int |
941 | netdev_get_stats(const struct netdev *netdev, struct netdev_stats *stats) | |
942 | { | |
943 | int error; | |
944 | ||
945 | COVERAGE_INC(netdev_get_stats); | |
a4af0040 JP |
946 | error = (netdev_get_dev(netdev)->netdev_class->get_stats |
947 | ? netdev_get_dev(netdev)->netdev_class->get_stats(netdev, stats) | |
8b61709d | 948 | : EOPNOTSUPP); |
064af421 BP |
949 | if (error) { |
950 | memset(stats, 0xff, sizeof *stats); | |
951 | } | |
952 | return error; | |
953 | } | |
954 | ||
8722022c BP |
955 | /* Attempts to change the stats for 'netdev' to those provided in 'stats'. |
956 | * Returns 0 if successful, otherwise a positive errno value. | |
957 | * | |
958 | * This will probably fail for most network devices. Some devices might only | |
959 | * allow setting their stats to 0. */ | |
960 | int | |
961 | netdev_set_stats(struct netdev *netdev, const struct netdev_stats *stats) | |
962 | { | |
963 | return (netdev_get_dev(netdev)->netdev_class->set_stats | |
964 | ? netdev_get_dev(netdev)->netdev_class->set_stats(netdev, stats) | |
965 | : EOPNOTSUPP); | |
966 | } | |
967 | ||
8b61709d BP |
968 | /* Attempts to set input rate limiting (policing) policy, such that up to |
969 | * 'kbits_rate' kbps of traffic is accepted, with a maximum accumulative burst | |
970 | * size of 'kbits' kb. */ | |
064af421 | 971 | int |
b1bf7d43 BP |
972 | netdev_set_policing(struct netdev *netdev, uint32_t kbits_rate, |
973 | uint32_t kbits_burst) | |
064af421 | 974 | { |
a4af0040 | 975 | return (netdev_get_dev(netdev)->netdev_class->set_policing |
d295e8e9 | 976 | ? netdev_get_dev(netdev)->netdev_class->set_policing(netdev, |
a4af0040 | 977 | kbits_rate, kbits_burst) |
8b61709d | 978 | : EOPNOTSUPP); |
064af421 BP |
979 | } |
980 | ||
c1c9c9c4 BP |
981 | /* Adds to 'types' all of the forms of QoS supported by 'netdev', or leaves it |
982 | * empty if 'netdev' does not support QoS. Any names added to 'types' should | |
983 | * be documented as valid for the "type" column in the "QoS" table in | |
984 | * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)). | |
985 | * | |
986 | * Every network device supports disabling QoS with a type of "", but this type | |
987 | * will not be added to 'types'. | |
988 | * | |
19993ef3 | 989 | * The caller must initialize 'types' (e.g. with sset_init()) before calling |
c1c9c9c4 | 990 | * this function. The caller is responsible for destroying 'types' (e.g. with |
19993ef3 | 991 | * sset_destroy()) when it is no longer needed. |
c1c9c9c4 BP |
992 | * |
993 | * Returns 0 if successful, otherwise a positive errno value. */ | |
994 | int | |
19993ef3 | 995 | netdev_get_qos_types(const struct netdev *netdev, struct sset *types) |
c1c9c9c4 BP |
996 | { |
997 | const struct netdev_class *class = netdev_get_dev(netdev)->netdev_class; | |
998 | return (class->get_qos_types | |
999 | ? class->get_qos_types(netdev, types) | |
1000 | : 0); | |
1001 | } | |
1002 | ||
1003 | /* Queries 'netdev' for its capabilities regarding the specified 'type' of QoS, | |
1004 | * which should be "" or one of the types returned by netdev_get_qos_types() | |
1005 | * for 'netdev'. Returns 0 if successful, otherwise a positive errno value. | |
1006 | * On success, initializes 'caps' with the QoS capabilities; on failure, clears | |
1007 | * 'caps' to all zeros. */ | |
1008 | int | |
1009 | netdev_get_qos_capabilities(const struct netdev *netdev, const char *type, | |
1010 | struct netdev_qos_capabilities *caps) | |
1011 | { | |
1012 | const struct netdev_class *class = netdev_get_dev(netdev)->netdev_class; | |
1013 | ||
1014 | if (*type) { | |
1015 | int retval = (class->get_qos_capabilities | |
1016 | ? class->get_qos_capabilities(netdev, type, caps) | |
1017 | : EOPNOTSUPP); | |
1018 | if (retval) { | |
1019 | memset(caps, 0, sizeof *caps); | |
1020 | } | |
1021 | return retval; | |
1022 | } else { | |
1023 | /* Every netdev supports turning off QoS. */ | |
1024 | memset(caps, 0, sizeof *caps); | |
1025 | return 0; | |
1026 | } | |
1027 | } | |
1028 | ||
1029 | /* Obtains the number of queues supported by 'netdev' for the specified 'type' | |
1030 | * of QoS. Returns 0 if successful, otherwise a positive errno value. Stores | |
1031 | * the number of queues (zero on failure) in '*n_queuesp'. | |
1032 | * | |
1033 | * This is just a simple wrapper around netdev_get_qos_capabilities(). */ | |
1034 | int | |
1035 | netdev_get_n_queues(const struct netdev *netdev, | |
1036 | const char *type, unsigned int *n_queuesp) | |
1037 | { | |
1038 | struct netdev_qos_capabilities caps; | |
1039 | int retval; | |
1040 | ||
1041 | retval = netdev_get_qos_capabilities(netdev, type, &caps); | |
1042 | *n_queuesp = caps.n_queues; | |
1043 | return retval; | |
1044 | } | |
1045 | ||
1046 | /* Queries 'netdev' about its currently configured form of QoS. If successful, | |
1047 | * stores the name of the current form of QoS into '*typep', stores any details | |
1048 | * of configuration as string key-value pairs in 'details', and returns 0. On | |
1049 | * failure, sets '*typep' to NULL and returns a positive errno value. | |
1050 | * | |
1051 | * A '*typep' of "" indicates that QoS is currently disabled on 'netdev'. | |
1052 | * | |
1053 | * The caller must initialize 'details' as an empty shash (e.g. with | |
1054 | * shash_init()) before calling this function. The caller must free 'details', | |
1055 | * including 'data' members, when it is no longer needed (e.g. with | |
1056 | * shash_destroy_free_data()). | |
1057 | * | |
1058 | * The caller must not modify or free '*typep'. | |
1059 | * | |
1060 | * '*typep' will be one of the types returned by netdev_get_qos_types() for | |
1061 | * 'netdev'. The contents of 'details' should be documented as valid for | |
1062 | * '*typep' in the "other_config" column in the "QoS" table in | |
1063 | * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)). */ | |
1064 | int | |
1065 | netdev_get_qos(const struct netdev *netdev, | |
1066 | const char **typep, struct shash *details) | |
1067 | { | |
1068 | const struct netdev_class *class = netdev_get_dev(netdev)->netdev_class; | |
1069 | int retval; | |
1070 | ||
1071 | if (class->get_qos) { | |
1072 | retval = class->get_qos(netdev, typep, details); | |
1073 | if (retval) { | |
1074 | *typep = NULL; | |
1075 | shash_clear_free_data(details); | |
1076 | } | |
1077 | return retval; | |
1078 | } else { | |
1079 | /* 'netdev' doesn't support QoS, so report that QoS is disabled. */ | |
1080 | *typep = ""; | |
1081 | return 0; | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | /* Attempts to reconfigure QoS on 'netdev', changing the form of QoS to 'type' | |
1086 | * with details of configuration from 'details'. Returns 0 if successful, | |
1087 | * otherwise a positive errno value. On error, the previous QoS configuration | |
1088 | * is retained. | |
1089 | * | |
1090 | * When this function changes the type of QoS (not just 'details'), this also | |
1091 | * resets all queue configuration for 'netdev' to their defaults (which depend | |
1092 | * on the specific type of QoS). Otherwise, the queue configuration for | |
1093 | * 'netdev' is unchanged. | |
1094 | * | |
1095 | * 'type' should be "" (to disable QoS) or one of the types returned by | |
1096 | * netdev_get_qos_types() for 'netdev'. The contents of 'details' should be | |
1097 | * documented as valid for the given 'type' in the "other_config" column in the | |
1098 | * "QoS" table in vswitchd/vswitch.xml (which is built as | |
1099 | * ovs-vswitchd.conf.db(8)). | |
1100 | * | |
1101 | * NULL may be specified for 'details' if there are no configuration | |
1102 | * details. */ | |
1103 | int | |
1104 | netdev_set_qos(struct netdev *netdev, | |
1105 | const char *type, const struct shash *details) | |
1106 | { | |
1107 | const struct netdev_class *class = netdev_get_dev(netdev)->netdev_class; | |
1108 | ||
1109 | if (!type) { | |
1110 | type = ""; | |
1111 | } | |
1112 | ||
1113 | if (class->set_qos) { | |
1114 | if (!details) { | |
1115 | static struct shash empty = SHASH_INITIALIZER(&empty); | |
1116 | details = ∅ | |
1117 | } | |
1118 | return class->set_qos(netdev, type, details); | |
1119 | } else { | |
1120 | return *type ? EOPNOTSUPP : 0; | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | /* Queries 'netdev' for information about the queue numbered 'queue_id'. If | |
1125 | * successful, adds that information as string key-value pairs to 'details'. | |
1126 | * Returns 0 if successful, otherwise a positive errno value. | |
1127 | * | |
1128 | * 'queue_id' must be less than the number of queues supported by 'netdev' for | |
1129 | * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)). | |
1130 | * | |
1131 | * The returned contents of 'details' should be documented as valid for the | |
1132 | * given 'type' in the "other_config" column in the "Queue" table in | |
1133 | * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)). | |
1134 | * | |
1135 | * The caller must initialize 'details' (e.g. with shash_init()) before calling | |
1136 | * this function. The caller must free 'details', including 'data' members, | |
1137 | * when it is no longer needed (e.g. with shash_destroy_free_data()). */ | |
1138 | int | |
1139 | netdev_get_queue(const struct netdev *netdev, | |
1140 | unsigned int queue_id, struct shash *details) | |
1141 | { | |
1142 | const struct netdev_class *class = netdev_get_dev(netdev)->netdev_class; | |
1143 | int retval; | |
1144 | ||
1145 | retval = (class->get_queue | |
1146 | ? class->get_queue(netdev, queue_id, details) | |
1147 | : EOPNOTSUPP); | |
1148 | if (retval) { | |
1149 | shash_clear_free_data(details); | |
1150 | } | |
1151 | return retval; | |
1152 | } | |
1153 | ||
1154 | /* Configures the queue numbered 'queue_id' on 'netdev' with the key-value | |
1155 | * string pairs in 'details'. The contents of 'details' should be documented | |
1156 | * as valid for the given 'type' in the "other_config" column in the "Queue" | |
1157 | * table in vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)). | |
1158 | * Returns 0 if successful, otherwise a positive errno value. On failure, the | |
1159 | * given queue's configuration should be unmodified. | |
1160 | * | |
1161 | * 'queue_id' must be less than the number of queues supported by 'netdev' for | |
1162 | * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)). | |
1163 | * | |
1164 | * This function does not modify 'details', and the caller retains ownership of | |
c1fdab01 | 1165 | * it. */ |
c1c9c9c4 BP |
1166 | int |
1167 | netdev_set_queue(struct netdev *netdev, | |
1168 | unsigned int queue_id, const struct shash *details) | |
1169 | { | |
1170 | const struct netdev_class *class = netdev_get_dev(netdev)->netdev_class; | |
1171 | return (class->set_queue | |
1172 | ? class->set_queue(netdev, queue_id, details) | |
1173 | : EOPNOTSUPP); | |
1174 | } | |
1175 | ||
1176 | /* Attempts to delete the queue numbered 'queue_id' from 'netdev'. Some kinds | |
1177 | * of QoS may have a fixed set of queues, in which case attempts to delete them | |
1178 | * will fail with EOPNOTSUPP. | |
1179 | * | |
1180 | * Returns 0 if successful, otherwise a positive errno value. On failure, the | |
1181 | * given queue will be unmodified. | |
1182 | * | |
1183 | * 'queue_id' must be less than the number of queues supported by 'netdev' for | |
1184 | * the current form of QoS (e.g. as returned by | |
1185 | * netdev_get_n_queues(netdev)). */ | |
1186 | int | |
1187 | netdev_delete_queue(struct netdev *netdev, unsigned int queue_id) | |
1188 | { | |
1189 | const struct netdev_class *class = netdev_get_dev(netdev)->netdev_class; | |
1190 | return (class->delete_queue | |
1191 | ? class->delete_queue(netdev, queue_id) | |
1192 | : EOPNOTSUPP); | |
1193 | } | |
1194 | ||
1195 | /* Obtains statistics about 'queue_id' on 'netdev'. On success, returns 0 and | |
1196 | * fills 'stats' with the queue's statistics; individual members of 'stats' may | |
1197 | * be set to all-1-bits if the statistic is unavailable. On failure, returns a | |
1198 | * positive errno value and fills 'stats' with all-1-bits. */ | |
1199 | int | |
1200 | netdev_get_queue_stats(const struct netdev *netdev, unsigned int queue_id, | |
1201 | struct netdev_queue_stats *stats) | |
1202 | { | |
1203 | const struct netdev_class *class = netdev_get_dev(netdev)->netdev_class; | |
1204 | int retval; | |
1205 | ||
1206 | retval = (class->get_queue_stats | |
1207 | ? class->get_queue_stats(netdev, queue_id, stats) | |
1208 | : EOPNOTSUPP); | |
1209 | if (retval) { | |
1210 | memset(stats, 0xff, sizeof *stats); | |
1211 | } | |
1212 | return retval; | |
1213 | } | |
1214 | ||
1215 | /* Iterates over all of 'netdev''s queues, calling 'cb' with the queue's ID, | |
1216 | * its configuration, and the 'aux' specified by the caller. The order of | |
1217 | * iteration is unspecified, but (when successful) each queue is visited | |
1218 | * exactly once. | |
1219 | * | |
1220 | * Calling this function may be more efficient than calling netdev_get_queue() | |
1221 | * for every queue. | |
1222 | * | |
1223 | * 'cb' must not modify or free the 'details' argument passed in. | |
1224 | * | |
1225 | * Returns 0 if successful, otherwise a positive errno value. On error, some | |
1226 | * configured queues may not have been included in the iteration. */ | |
1227 | int | |
1228 | netdev_dump_queues(const struct netdev *netdev, | |
1229 | netdev_dump_queues_cb *cb, void *aux) | |
1230 | { | |
1231 | const struct netdev_class *class = netdev_get_dev(netdev)->netdev_class; | |
1232 | return (class->dump_queues | |
1233 | ? class->dump_queues(netdev, cb, aux) | |
1234 | : EOPNOTSUPP); | |
1235 | } | |
1236 | ||
1237 | /* Iterates over all of 'netdev''s queues, calling 'cb' with the queue's ID, | |
1238 | * its statistics, and the 'aux' specified by the caller. The order of | |
1239 | * iteration is unspecified, but (when successful) each queue is visited | |
1240 | * exactly once. | |
1241 | * | |
1242 | * Calling this function may be more efficient than calling | |
1243 | * netdev_get_queue_stats() for every queue. | |
1244 | * | |
1245 | * 'cb' must not modify or free the statistics passed in. | |
1246 | * | |
1247 | * Returns 0 if successful, otherwise a positive errno value. On error, some | |
1248 | * configured queues may not have been included in the iteration. */ | |
1249 | int | |
1250 | netdev_dump_queue_stats(const struct netdev *netdev, | |
1251 | netdev_dump_queue_stats_cb *cb, void *aux) | |
1252 | { | |
1253 | const struct netdev_class *class = netdev_get_dev(netdev)->netdev_class; | |
1254 | return (class->dump_queue_stats | |
1255 | ? class->dump_queue_stats(netdev, cb, aux) | |
1256 | : EOPNOTSUPP); | |
1257 | } | |
1258 | ||
ac4d3bcb EJ |
1259 | /* Returns a sequence number which indicates changes in one of 'netdev''s |
1260 | * properties. The returned sequence will be nonzero so that callers have a | |
1261 | * value which they may use as a reset when tracking 'netdev'. | |
1262 | * | |
1263 | * The returned sequence number will change whenever 'netdev''s flags, | |
1264 | * features, ethernet address, or carrier changes. It may change for other | |
1265 | * reasons as well, or no reason at all. */ | |
1266 | unsigned int | |
1267 | netdev_change_seq(const struct netdev *netdev) | |
1268 | { | |
1269 | return netdev_get_dev(netdev)->netdev_class->change_seq(netdev); | |
1270 | } | |
1271 | ||
8b61709d BP |
1272 | /* If 'netdev' is a VLAN network device (e.g. one created with vconfig(8)), |
1273 | * sets '*vlan_vid' to the VLAN VID associated with that device and returns 0. | |
1274 | * Otherwise returns a errno value (specifically ENOENT if 'netdev_name' is the | |
1275 | * name of a network device that is not a VLAN device) and sets '*vlan_vid' to | |
1276 | * -1. */ | |
1277 | int | |
1278 | netdev_get_vlan_vid(const struct netdev *netdev, int *vlan_vid) | |
064af421 | 1279 | { |
a4af0040 | 1280 | int error = (netdev_get_dev(netdev)->netdev_class->get_vlan_vid |
d295e8e9 | 1281 | ? netdev_get_dev(netdev)->netdev_class->get_vlan_vid(netdev, |
a4af0040 | 1282 | vlan_vid) |
8b61709d BP |
1283 | : ENOENT); |
1284 | if (error) { | |
1285 | *vlan_vid = 0; | |
064af421 | 1286 | } |
8b61709d | 1287 | return error; |
064af421 BP |
1288 | } |
1289 | ||
c752217a BP |
1290 | /* Returns a network device that has 'in4' as its IP address, if one exists, |
1291 | * otherwise a null pointer. */ | |
1292 | struct netdev * | |
1293 | netdev_find_dev_by_in4(const struct in_addr *in4) | |
79c720a8 | 1294 | { |
c752217a | 1295 | struct netdev *netdev; |
19993ef3 BP |
1296 | struct sset dev_list = SSET_INITIALIZER(&dev_list); |
1297 | const char *name; | |
79c720a8 | 1298 | |
79c720a8 | 1299 | netdev_enumerate(&dev_list); |
19993ef3 | 1300 | SSET_FOR_EACH (name, &dev_list) { |
c752217a BP |
1301 | struct in_addr dev_in4; |
1302 | ||
18812dff | 1303 | if (!netdev_open(name, "system", &netdev) |
f1acd62b | 1304 | && !netdev_get_in4(netdev, &dev_in4, NULL) |
c752217a BP |
1305 | && dev_in4.s_addr == in4->s_addr) { |
1306 | goto exit; | |
79c720a8 | 1307 | } |
c752217a | 1308 | netdev_close(netdev); |
79c720a8 | 1309 | } |
c752217a | 1310 | netdev = NULL; |
79c720a8 | 1311 | |
c752217a | 1312 | exit: |
19993ef3 | 1313 | sset_destroy(&dev_list); |
c752217a | 1314 | return netdev; |
79c720a8 | 1315 | } |
8b61709d | 1316 | \f |
6d9e6eb4 BP |
1317 | /* Initializes 'netdev_dev' as a netdev device named 'name' of the specified |
1318 | * 'netdev_class'. This function is ordinarily called from a netdev provider's | |
1319 | * 'create' function. | |
1320 | * | |
149f577a JG |
1321 | * This function adds 'netdev_dev' to a netdev-owned shash, so it is |
1322 | * very important that 'netdev_dev' only be freed after calling | |
1323 | * the refcount drops to zero. */ | |
1324 | void | |
1325 | netdev_dev_init(struct netdev_dev *netdev_dev, const char *name, | |
7dab847a | 1326 | const struct netdev_class *netdev_class) |
149f577a JG |
1327 | { |
1328 | assert(!shash_find(&netdev_dev_shash, name)); | |
1329 | ||
0f4f4a61 | 1330 | memset(netdev_dev, 0, sizeof *netdev_dev); |
7dab847a | 1331 | netdev_dev->netdev_class = netdev_class; |
149f577a JG |
1332 | netdev_dev->name = xstrdup(name); |
1333 | netdev_dev->node = shash_add(&netdev_dev_shash, name, netdev_dev); | |
1334 | } | |
1335 | ||
1336 | /* Undoes the results of initialization. | |
1337 | * | |
1338 | * Normally this function does not need to be called as netdev_close has | |
1339 | * the same effect when the refcount drops to zero. | |
1340 | * However, it may be called by providers due to an error on creation | |
1341 | * that occurs after initialization. It this case netdev_close() would | |
1342 | * never be called. */ | |
6c88d577 | 1343 | void |
149f577a | 1344 | netdev_dev_uninit(struct netdev_dev *netdev_dev, bool destroy) |
6c88d577 | 1345 | { |
149f577a JG |
1346 | char *name = netdev_dev->name; |
1347 | ||
1348 | assert(!netdev_dev->ref_cnt); | |
1349 | ||
1350 | shash_delete(&netdev_dev_shash, netdev_dev->node); | |
6c88d577 | 1351 | |
149f577a | 1352 | if (destroy) { |
a4af0040 | 1353 | netdev_dev->netdev_class->destroy(netdev_dev); |
149f577a JG |
1354 | } |
1355 | free(name); | |
6c88d577 JP |
1356 | } |
1357 | ||
149f577a | 1358 | /* Returns the class type of 'netdev_dev'. |
a740f0de JG |
1359 | * |
1360 | * The caller must not free the returned value. */ | |
149f577a JG |
1361 | const char * |
1362 | netdev_dev_get_type(const struct netdev_dev *netdev_dev) | |
a740f0de | 1363 | { |
a4af0040 | 1364 | return netdev_dev->netdev_class->type; |
a740f0de JG |
1365 | } |
1366 | ||
15b3596a JG |
1367 | /* Returns the class associated with 'netdev_dev'. */ |
1368 | const struct netdev_class * | |
1369 | netdev_dev_get_class(const struct netdev_dev *netdev_dev) | |
1370 | { | |
1371 | return netdev_dev->netdev_class; | |
1372 | } | |
1373 | ||
149f577a | 1374 | /* Returns the name of 'netdev_dev'. |
a740f0de JG |
1375 | * |
1376 | * The caller must not free the returned value. */ | |
149f577a JG |
1377 | const char * |
1378 | netdev_dev_get_name(const struct netdev_dev *netdev_dev) | |
a740f0de | 1379 | { |
149f577a | 1380 | return netdev_dev->name; |
a740f0de JG |
1381 | } |
1382 | ||
46415c90 JG |
1383 | /* Returns the netdev_dev with 'name' or NULL if there is none. |
1384 | * | |
1385 | * The caller must not free the returned value. */ | |
1386 | struct netdev_dev * | |
1387 | netdev_dev_from_name(const char *name) | |
1388 | { | |
1389 | return shash_find_data(&netdev_dev_shash, name); | |
1390 | } | |
1391 | ||
7dab847a | 1392 | /* Fills 'device_list' with devices that match 'netdev_class'. |
46415c90 JG |
1393 | * |
1394 | * The caller is responsible for initializing and destroying 'device_list' | |
1395 | * but the contained netdev_devs must not be freed. */ | |
1396 | void | |
7dab847a | 1397 | netdev_dev_get_devices(const struct netdev_class *netdev_class, |
46415c90 JG |
1398 | struct shash *device_list) |
1399 | { | |
1400 | struct shash_node *node; | |
1401 | SHASH_FOR_EACH (node, &netdev_dev_shash) { | |
1402 | struct netdev_dev *dev = node->data; | |
1403 | ||
7dab847a | 1404 | if (dev->netdev_class == netdev_class) { |
46415c90 JG |
1405 | shash_add(device_list, node->name, node->data); |
1406 | } | |
1407 | } | |
1408 | } | |
1409 | ||
149f577a | 1410 | /* Initializes 'netdev' as a instance of the netdev_dev. |
8b61709d BP |
1411 | * |
1412 | * This function adds 'netdev' to a netdev-owned linked list, so it is very | |
1413 | * important that 'netdev' only be freed after calling netdev_close(). */ | |
1414 | void | |
149f577a | 1415 | netdev_init(struct netdev *netdev, struct netdev_dev *netdev_dev) |
064af421 | 1416 | { |
0f4f4a61 | 1417 | memset(netdev, 0, sizeof *netdev); |
149f577a | 1418 | netdev->netdev_dev = netdev_dev; |
8b61709d BP |
1419 | list_push_back(&netdev_list, &netdev->node); |
1420 | } | |
064af421 | 1421 | |
149f577a JG |
1422 | /* Undoes the results of initialization. |
1423 | * | |
1424 | * Normally this function only needs to be called from netdev_close(). | |
1425 | * However, it may be called by providers due to an error on opening | |
1426 | * that occurs after initialization. It this case netdev_close() would | |
1427 | * never be called. */ | |
1428 | void | |
1429 | netdev_uninit(struct netdev *netdev, bool close) | |
1430 | { | |
1431 | /* Restore flags that we changed, if any. */ | |
1432 | int error = restore_flags(netdev); | |
1433 | list_remove(&netdev->node); | |
1434 | if (error) { | |
1435 | VLOG_WARN("failed to restore network device flags on %s: %s", | |
1436 | netdev_get_name(netdev), strerror(error)); | |
1437 | } | |
1438 | ||
1439 | if (close) { | |
a4af0040 | 1440 | netdev_get_dev(netdev)->netdev_class->close(netdev); |
149f577a JG |
1441 | } |
1442 | } | |
1443 | ||
1444 | ||
d295e8e9 | 1445 | /* Returns the class type of 'netdev'. |
6c88d577 JP |
1446 | * |
1447 | * The caller must not free the returned value. */ | |
149f577a JG |
1448 | const char * |
1449 | netdev_get_type(const struct netdev *netdev) | |
1450 | { | |
a4af0040 | 1451 | return netdev_get_dev(netdev)->netdev_class->type; |
149f577a JG |
1452 | } |
1453 | ||
1454 | struct netdev_dev * | |
1455 | netdev_get_dev(const struct netdev *netdev) | |
6c88d577 | 1456 | { |
149f577a | 1457 | return netdev->netdev_dev; |
6c88d577 | 1458 | } |
e9e28be3 | 1459 | \f |
064af421 BP |
1460 | /* Restore the network device flags on 'netdev' to those that were active |
1461 | * before we changed them. Returns 0 if successful, otherwise a positive | |
1462 | * errno value. | |
1463 | * | |
1464 | * To avoid reentry, the caller must ensure that fatal signals are blocked. */ | |
1465 | static int | |
1466 | restore_flags(struct netdev *netdev) | |
1467 | { | |
8b61709d BP |
1468 | if (netdev->changed_flags) { |
1469 | enum netdev_flags restore = netdev->save_flags & netdev->changed_flags; | |
1470 | enum netdev_flags old_flags; | |
a4af0040 | 1471 | return netdev_get_dev(netdev)->netdev_class->update_flags(netdev, |
8b61709d BP |
1472 | netdev->changed_flags & ~restore, |
1473 | restore, &old_flags); | |
064af421 | 1474 | } |
064af421 BP |
1475 | return 0; |
1476 | } | |
1477 | ||
0b0544d7 JG |
1478 | /* Close all netdevs on shutdown so they can do any needed cleanup such as |
1479 | * destroying devices, restoring flags, etc. */ | |
064af421 | 1480 | static void |
c69ee87c | 1481 | close_all_netdevs(void *aux OVS_UNUSED) |
064af421 | 1482 | { |
0b0544d7 | 1483 | struct netdev *netdev, *next; |
4e8e4213 | 1484 | LIST_FOR_EACH_SAFE(netdev, next, node, &netdev_list) { |
0b0544d7 | 1485 | netdev_close(netdev); |
064af421 BP |
1486 | } |
1487 | } |