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[thirdparty/kernel/stable.git] / net / ethtool / netlink.c
1 // SPDX-License-Identifier: GPL-2.0-only
2
3 #include <net/sock.h>
4 #include <linux/ethtool_netlink.h>
5 #include <linux/pm_runtime.h>
6 #include "netlink.h"
7
8 static struct genl_family ethtool_genl_family;
9
10 static bool ethnl_ok __read_mostly;
11 static u32 ethnl_bcast_seq;
12
13 #define ETHTOOL_FLAGS_BASIC (ETHTOOL_FLAG_COMPACT_BITSETS | \
14 ETHTOOL_FLAG_OMIT_REPLY)
15 #define ETHTOOL_FLAGS_STATS (ETHTOOL_FLAGS_BASIC | ETHTOOL_FLAG_STATS)
16
17 const struct nla_policy ethnl_header_policy[] = {
18 [ETHTOOL_A_HEADER_DEV_INDEX] = { .type = NLA_U32 },
19 [ETHTOOL_A_HEADER_DEV_NAME] = { .type = NLA_NUL_STRING,
20 .len = ALTIFNAMSIZ - 1 },
21 [ETHTOOL_A_HEADER_FLAGS] = NLA_POLICY_MASK(NLA_U32,
22 ETHTOOL_FLAGS_BASIC),
23 };
24
25 const struct nla_policy ethnl_header_policy_stats[] = {
26 [ETHTOOL_A_HEADER_DEV_INDEX] = { .type = NLA_U32 },
27 [ETHTOOL_A_HEADER_DEV_NAME] = { .type = NLA_NUL_STRING,
28 .len = ALTIFNAMSIZ - 1 },
29 [ETHTOOL_A_HEADER_FLAGS] = NLA_POLICY_MASK(NLA_U32,
30 ETHTOOL_FLAGS_STATS),
31 };
32
33 int ethnl_ops_begin(struct net_device *dev)
34 {
35 int ret;
36
37 if (!dev)
38 return -ENODEV;
39
40 if (dev->dev.parent)
41 pm_runtime_get_sync(dev->dev.parent);
42
43 if (!netif_device_present(dev) ||
44 dev->reg_state == NETREG_UNREGISTERING) {
45 ret = -ENODEV;
46 goto err;
47 }
48
49 if (dev->ethtool_ops->begin) {
50 ret = dev->ethtool_ops->begin(dev);
51 if (ret)
52 goto err;
53 }
54
55 return 0;
56 err:
57 if (dev->dev.parent)
58 pm_runtime_put(dev->dev.parent);
59
60 return ret;
61 }
62
63 void ethnl_ops_complete(struct net_device *dev)
64 {
65 if (dev->ethtool_ops->complete)
66 dev->ethtool_ops->complete(dev);
67
68 if (dev->dev.parent)
69 pm_runtime_put(dev->dev.parent);
70 }
71
72 /**
73 * ethnl_parse_header_dev_get() - parse request header
74 * @req_info: structure to put results into
75 * @header: nest attribute with request header
76 * @net: request netns
77 * @extack: netlink extack for error reporting
78 * @require_dev: fail if no device identified in header
79 *
80 * Parse request header in nested attribute @nest and puts results into
81 * the structure pointed to by @req_info. Extack from @info is used for error
82 * reporting. If req_info->dev is not null on return, reference to it has
83 * been taken. If error is returned, *req_info is null initialized and no
84 * reference is held.
85 *
86 * Return: 0 on success or negative error code
87 */
88 int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
89 const struct nlattr *header, struct net *net,
90 struct netlink_ext_ack *extack, bool require_dev)
91 {
92 struct nlattr *tb[ARRAY_SIZE(ethnl_header_policy)];
93 const struct nlattr *devname_attr;
94 struct net_device *dev = NULL;
95 u32 flags = 0;
96 int ret;
97
98 if (!header) {
99 if (!require_dev)
100 return 0;
101 NL_SET_ERR_MSG(extack, "request header missing");
102 return -EINVAL;
103 }
104 /* No validation here, command policy should have a nested policy set
105 * for the header, therefore validation should have already been done.
106 */
107 ret = nla_parse_nested(tb, ARRAY_SIZE(ethnl_header_policy) - 1, header,
108 NULL, extack);
109 if (ret < 0)
110 return ret;
111 if (tb[ETHTOOL_A_HEADER_FLAGS])
112 flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]);
113
114 devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME];
115 if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) {
116 u32 ifindex = nla_get_u32(tb[ETHTOOL_A_HEADER_DEV_INDEX]);
117
118 dev = netdev_get_by_index(net, ifindex, &req_info->dev_tracker,
119 GFP_KERNEL);
120 if (!dev) {
121 NL_SET_ERR_MSG_ATTR(extack,
122 tb[ETHTOOL_A_HEADER_DEV_INDEX],
123 "no device matches ifindex");
124 return -ENODEV;
125 }
126 /* if both ifindex and ifname are passed, they must match */
127 if (devname_attr &&
128 strncmp(dev->name, nla_data(devname_attr), IFNAMSIZ)) {
129 netdev_put(dev, &req_info->dev_tracker);
130 NL_SET_ERR_MSG_ATTR(extack, header,
131 "ifindex and name do not match");
132 return -ENODEV;
133 }
134 } else if (devname_attr) {
135 dev = netdev_get_by_name(net, nla_data(devname_attr),
136 &req_info->dev_tracker, GFP_KERNEL);
137 if (!dev) {
138 NL_SET_ERR_MSG_ATTR(extack, devname_attr,
139 "no device matches name");
140 return -ENODEV;
141 }
142 } else if (require_dev) {
143 NL_SET_ERR_MSG_ATTR(extack, header,
144 "neither ifindex nor name specified");
145 return -EINVAL;
146 }
147
148 req_info->dev = dev;
149 req_info->flags = flags;
150 return 0;
151 }
152
153 /**
154 * ethnl_fill_reply_header() - Put common header into a reply message
155 * @skb: skb with the message
156 * @dev: network device to describe in header
157 * @attrtype: attribute type to use for the nest
158 *
159 * Create a nested attribute with attributes describing given network device.
160 *
161 * Return: 0 on success, error value (-EMSGSIZE only) on error
162 */
163 int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev,
164 u16 attrtype)
165 {
166 struct nlattr *nest;
167
168 if (!dev)
169 return 0;
170 nest = nla_nest_start(skb, attrtype);
171 if (!nest)
172 return -EMSGSIZE;
173
174 if (nla_put_u32(skb, ETHTOOL_A_HEADER_DEV_INDEX, (u32)dev->ifindex) ||
175 nla_put_string(skb, ETHTOOL_A_HEADER_DEV_NAME, dev->name))
176 goto nla_put_failure;
177 /* If more attributes are put into reply header, ethnl_header_size()
178 * must be updated to account for them.
179 */
180
181 nla_nest_end(skb, nest);
182 return 0;
183
184 nla_put_failure:
185 nla_nest_cancel(skb, nest);
186 return -EMSGSIZE;
187 }
188
189 /**
190 * ethnl_reply_init() - Create skb for a reply and fill device identification
191 * @payload: payload length (without netlink and genetlink header)
192 * @dev: device the reply is about (may be null)
193 * @cmd: ETHTOOL_MSG_* message type for reply
194 * @hdr_attrtype: attribute type for common header
195 * @info: genetlink info of the received packet we respond to
196 * @ehdrp: place to store payload pointer returned by genlmsg_new()
197 *
198 * Return: pointer to allocated skb on success, NULL on error
199 */
200 struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
201 u16 hdr_attrtype, struct genl_info *info,
202 void **ehdrp)
203 {
204 struct sk_buff *skb;
205
206 skb = genlmsg_new(payload, GFP_KERNEL);
207 if (!skb)
208 goto err;
209 *ehdrp = genlmsg_put_reply(skb, info, &ethtool_genl_family, 0, cmd);
210 if (!*ehdrp)
211 goto err_free;
212
213 if (dev) {
214 int ret;
215
216 ret = ethnl_fill_reply_header(skb, dev, hdr_attrtype);
217 if (ret < 0)
218 goto err_free;
219 }
220 return skb;
221
222 err_free:
223 nlmsg_free(skb);
224 err:
225 if (info)
226 GENL_SET_ERR_MSG(info, "failed to setup reply message");
227 return NULL;
228 }
229
230 void *ethnl_dump_put(struct sk_buff *skb, struct netlink_callback *cb, u8 cmd)
231 {
232 return genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
233 &ethtool_genl_family, 0, cmd);
234 }
235
236 void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd)
237 {
238 return genlmsg_put(skb, 0, ++ethnl_bcast_seq, &ethtool_genl_family, 0,
239 cmd);
240 }
241
242 int ethnl_multicast(struct sk_buff *skb, struct net_device *dev)
243 {
244 return genlmsg_multicast_netns(&ethtool_genl_family, dev_net(dev), skb,
245 0, ETHNL_MCGRP_MONITOR, GFP_KERNEL);
246 }
247
248 /* GET request helpers */
249
250 /**
251 * struct ethnl_dump_ctx - context structure for generic dumpit() callback
252 * @ops: request ops of currently processed message type
253 * @req_info: parsed request header of processed request
254 * @reply_data: data needed to compose the reply
255 * @pos_ifindex: saved iteration position - ifindex
256 *
257 * These parameters are kept in struct netlink_callback as context preserved
258 * between iterations. They are initialized by ethnl_default_start() and used
259 * in ethnl_default_dumpit() and ethnl_default_done().
260 */
261 struct ethnl_dump_ctx {
262 const struct ethnl_request_ops *ops;
263 struct ethnl_req_info *req_info;
264 struct ethnl_reply_data *reply_data;
265 unsigned long pos_ifindex;
266 };
267
268 static const struct ethnl_request_ops *
269 ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
270 [ETHTOOL_MSG_STRSET_GET] = &ethnl_strset_request_ops,
271 [ETHTOOL_MSG_LINKINFO_GET] = &ethnl_linkinfo_request_ops,
272 [ETHTOOL_MSG_LINKINFO_SET] = &ethnl_linkinfo_request_ops,
273 [ETHTOOL_MSG_LINKMODES_GET] = &ethnl_linkmodes_request_ops,
274 [ETHTOOL_MSG_LINKMODES_SET] = &ethnl_linkmodes_request_ops,
275 [ETHTOOL_MSG_LINKSTATE_GET] = &ethnl_linkstate_request_ops,
276 [ETHTOOL_MSG_DEBUG_GET] = &ethnl_debug_request_ops,
277 [ETHTOOL_MSG_DEBUG_SET] = &ethnl_debug_request_ops,
278 [ETHTOOL_MSG_WOL_GET] = &ethnl_wol_request_ops,
279 [ETHTOOL_MSG_WOL_SET] = &ethnl_wol_request_ops,
280 [ETHTOOL_MSG_FEATURES_GET] = &ethnl_features_request_ops,
281 [ETHTOOL_MSG_PRIVFLAGS_GET] = &ethnl_privflags_request_ops,
282 [ETHTOOL_MSG_PRIVFLAGS_SET] = &ethnl_privflags_request_ops,
283 [ETHTOOL_MSG_RINGS_GET] = &ethnl_rings_request_ops,
284 [ETHTOOL_MSG_RINGS_SET] = &ethnl_rings_request_ops,
285 [ETHTOOL_MSG_CHANNELS_GET] = &ethnl_channels_request_ops,
286 [ETHTOOL_MSG_CHANNELS_SET] = &ethnl_channels_request_ops,
287 [ETHTOOL_MSG_COALESCE_GET] = &ethnl_coalesce_request_ops,
288 [ETHTOOL_MSG_COALESCE_SET] = &ethnl_coalesce_request_ops,
289 [ETHTOOL_MSG_PAUSE_GET] = &ethnl_pause_request_ops,
290 [ETHTOOL_MSG_PAUSE_SET] = &ethnl_pause_request_ops,
291 [ETHTOOL_MSG_EEE_GET] = &ethnl_eee_request_ops,
292 [ETHTOOL_MSG_EEE_SET] = &ethnl_eee_request_ops,
293 [ETHTOOL_MSG_FEC_GET] = &ethnl_fec_request_ops,
294 [ETHTOOL_MSG_FEC_SET] = &ethnl_fec_request_ops,
295 [ETHTOOL_MSG_TSINFO_GET] = &ethnl_tsinfo_request_ops,
296 [ETHTOOL_MSG_MODULE_EEPROM_GET] = &ethnl_module_eeprom_request_ops,
297 [ETHTOOL_MSG_STATS_GET] = &ethnl_stats_request_ops,
298 [ETHTOOL_MSG_PHC_VCLOCKS_GET] = &ethnl_phc_vclocks_request_ops,
299 [ETHTOOL_MSG_MODULE_GET] = &ethnl_module_request_ops,
300 [ETHTOOL_MSG_MODULE_SET] = &ethnl_module_request_ops,
301 [ETHTOOL_MSG_PSE_GET] = &ethnl_pse_request_ops,
302 [ETHTOOL_MSG_PSE_SET] = &ethnl_pse_request_ops,
303 [ETHTOOL_MSG_RSS_GET] = &ethnl_rss_request_ops,
304 [ETHTOOL_MSG_PLCA_GET_CFG] = &ethnl_plca_cfg_request_ops,
305 [ETHTOOL_MSG_PLCA_SET_CFG] = &ethnl_plca_cfg_request_ops,
306 [ETHTOOL_MSG_PLCA_GET_STATUS] = &ethnl_plca_status_request_ops,
307 [ETHTOOL_MSG_MM_GET] = &ethnl_mm_request_ops,
308 [ETHTOOL_MSG_MM_SET] = &ethnl_mm_request_ops,
309 };
310
311 static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
312 {
313 return (struct ethnl_dump_ctx *)cb->ctx;
314 }
315
316 /**
317 * ethnl_default_parse() - Parse request message
318 * @req_info: pointer to structure to put data into
319 * @info: genl_info from the request
320 * @request_ops: struct request_ops for request type
321 * @require_dev: fail if no device identified in header
322 *
323 * Parse universal request header and call request specific ->parse_request()
324 * callback (if defined) to parse the rest of the message.
325 *
326 * Return: 0 on success or negative error code
327 */
328 static int ethnl_default_parse(struct ethnl_req_info *req_info,
329 const struct genl_info *info,
330 const struct ethnl_request_ops *request_ops,
331 bool require_dev)
332 {
333 struct nlattr **tb = info->attrs;
334 int ret;
335
336 ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr],
337 genl_info_net(info), info->extack,
338 require_dev);
339 if (ret < 0)
340 return ret;
341
342 if (request_ops->parse_request) {
343 ret = request_ops->parse_request(req_info, tb, info->extack);
344 if (ret < 0)
345 return ret;
346 }
347
348 return 0;
349 }
350
351 /**
352 * ethnl_init_reply_data() - Initialize reply data for GET request
353 * @reply_data: pointer to embedded struct ethnl_reply_data
354 * @ops: instance of struct ethnl_request_ops describing the layout
355 * @dev: network device to initialize the reply for
356 *
357 * Fills the reply data part with zeros and sets the dev member. Must be called
358 * before calling the ->fill_reply() callback (for each iteration when handling
359 * dump requests).
360 */
361 static void ethnl_init_reply_data(struct ethnl_reply_data *reply_data,
362 const struct ethnl_request_ops *ops,
363 struct net_device *dev)
364 {
365 memset(reply_data, 0, ops->reply_data_size);
366 reply_data->dev = dev;
367 }
368
369 /* default ->doit() handler for GET type requests */
370 static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info)
371 {
372 struct ethnl_reply_data *reply_data = NULL;
373 struct ethnl_req_info *req_info = NULL;
374 const u8 cmd = info->genlhdr->cmd;
375 const struct ethnl_request_ops *ops;
376 int hdr_len, reply_len;
377 struct sk_buff *rskb;
378 void *reply_payload;
379 int ret;
380
381 ops = ethnl_default_requests[cmd];
382 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
383 return -EOPNOTSUPP;
384 if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr))
385 return -EINVAL;
386
387 req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
388 if (!req_info)
389 return -ENOMEM;
390 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
391 if (!reply_data) {
392 kfree(req_info);
393 return -ENOMEM;
394 }
395
396 ret = ethnl_default_parse(req_info, info, ops, !ops->allow_nodev_do);
397 if (ret < 0)
398 goto err_dev;
399 ethnl_init_reply_data(reply_data, ops, req_info->dev);
400
401 rtnl_lock();
402 ret = ops->prepare_data(req_info, reply_data, info);
403 rtnl_unlock();
404 if (ret < 0)
405 goto err_cleanup;
406 ret = ops->reply_size(req_info, reply_data);
407 if (ret < 0)
408 goto err_cleanup;
409 reply_len = ret;
410 ret = -ENOMEM;
411 rskb = ethnl_reply_init(reply_len + ethnl_reply_header_size(),
412 req_info->dev, ops->reply_cmd,
413 ops->hdr_attr, info, &reply_payload);
414 if (!rskb)
415 goto err_cleanup;
416 hdr_len = rskb->len;
417 ret = ops->fill_reply(rskb, req_info, reply_data);
418 if (ret < 0)
419 goto err_msg;
420 WARN_ONCE(rskb->len - hdr_len > reply_len,
421 "ethnl cmd %d: calculated reply length %d, but consumed %d\n",
422 cmd, reply_len, rskb->len - hdr_len);
423 if (ops->cleanup_data)
424 ops->cleanup_data(reply_data);
425
426 genlmsg_end(rskb, reply_payload);
427 netdev_put(req_info->dev, &req_info->dev_tracker);
428 kfree(reply_data);
429 kfree(req_info);
430 return genlmsg_reply(rskb, info);
431
432 err_msg:
433 WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len);
434 nlmsg_free(rskb);
435 err_cleanup:
436 if (ops->cleanup_data)
437 ops->cleanup_data(reply_data);
438 err_dev:
439 netdev_put(req_info->dev, &req_info->dev_tracker);
440 kfree(reply_data);
441 kfree(req_info);
442 return ret;
443 }
444
445 static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev,
446 const struct ethnl_dump_ctx *ctx,
447 const struct genl_info *info)
448 {
449 void *ehdr;
450 int ret;
451
452 ehdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
453 &ethtool_genl_family, NLM_F_MULTI,
454 ctx->ops->reply_cmd);
455 if (!ehdr)
456 return -EMSGSIZE;
457
458 ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev);
459 rtnl_lock();
460 ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, info);
461 rtnl_unlock();
462 if (ret < 0)
463 goto out;
464 ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr);
465 if (ret < 0)
466 goto out;
467 ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data);
468
469 out:
470 if (ctx->ops->cleanup_data)
471 ctx->ops->cleanup_data(ctx->reply_data);
472 ctx->reply_data->dev = NULL;
473 if (ret < 0)
474 genlmsg_cancel(skb, ehdr);
475 else
476 genlmsg_end(skb, ehdr);
477 return ret;
478 }
479
480 /* Default ->dumpit() handler for GET requests. Device iteration copied from
481 * rtnl_dump_ifinfo(); we have to be more careful about device hashtable
482 * persistence as we cannot guarantee to hold RTNL lock through the whole
483 * function as rtnetnlink does.
484 */
485 static int ethnl_default_dumpit(struct sk_buff *skb,
486 struct netlink_callback *cb)
487 {
488 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
489 struct net *net = sock_net(skb->sk);
490 struct net_device *dev;
491 int ret = 0;
492
493 rtnl_lock();
494 for_each_netdev_dump(net, dev, ctx->pos_ifindex) {
495 dev_hold(dev);
496 rtnl_unlock();
497
498 ret = ethnl_default_dump_one(skb, dev, ctx, genl_info_dump(cb));
499
500 rtnl_lock();
501 dev_put(dev);
502
503 if (ret < 0 && ret != -EOPNOTSUPP) {
504 if (likely(skb->len))
505 ret = skb->len;
506 break;
507 }
508 }
509 rtnl_unlock();
510
511 return ret;
512 }
513
514 /* generic ->start() handler for GET requests */
515 static int ethnl_default_start(struct netlink_callback *cb)
516 {
517 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
518 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
519 struct ethnl_reply_data *reply_data;
520 const struct ethnl_request_ops *ops;
521 struct ethnl_req_info *req_info;
522 struct genlmsghdr *ghdr;
523 int ret;
524
525 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
526
527 ghdr = nlmsg_data(cb->nlh);
528 ops = ethnl_default_requests[ghdr->cmd];
529 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd))
530 return -EOPNOTSUPP;
531 req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
532 if (!req_info)
533 return -ENOMEM;
534 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
535 if (!reply_data) {
536 ret = -ENOMEM;
537 goto free_req_info;
538 }
539
540 ret = ethnl_default_parse(req_info, &info->info, ops, false);
541 if (req_info->dev) {
542 /* We ignore device specification in dump requests but as the
543 * same parser as for non-dump (doit) requests is used, it
544 * would take reference to the device if it finds one
545 */
546 netdev_put(req_info->dev, &req_info->dev_tracker);
547 req_info->dev = NULL;
548 }
549 if (ret < 0)
550 goto free_reply_data;
551
552 ctx->ops = ops;
553 ctx->req_info = req_info;
554 ctx->reply_data = reply_data;
555 ctx->pos_ifindex = 0;
556
557 return 0;
558
559 free_reply_data:
560 kfree(reply_data);
561 free_req_info:
562 kfree(req_info);
563
564 return ret;
565 }
566
567 /* default ->done() handler for GET requests */
568 static int ethnl_default_done(struct netlink_callback *cb)
569 {
570 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
571
572 kfree(ctx->reply_data);
573 kfree(ctx->req_info);
574
575 return 0;
576 }
577
578 static int ethnl_default_set_doit(struct sk_buff *skb, struct genl_info *info)
579 {
580 const struct ethnl_request_ops *ops;
581 struct ethnl_req_info req_info = {};
582 const u8 cmd = info->genlhdr->cmd;
583 int ret;
584
585 ops = ethnl_default_requests[cmd];
586 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
587 return -EOPNOTSUPP;
588 if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr))
589 return -EINVAL;
590
591 ret = ethnl_parse_header_dev_get(&req_info, info->attrs[ops->hdr_attr],
592 genl_info_net(info), info->extack,
593 true);
594 if (ret < 0)
595 return ret;
596
597 if (ops->set_validate) {
598 ret = ops->set_validate(&req_info, info);
599 /* 0 means nothing to do */
600 if (ret <= 0)
601 goto out_dev;
602 }
603
604 rtnl_lock();
605 ret = ethnl_ops_begin(req_info.dev);
606 if (ret < 0)
607 goto out_rtnl;
608
609 ret = ops->set(&req_info, info);
610 if (ret <= 0)
611 goto out_ops;
612 ethtool_notify(req_info.dev, ops->set_ntf_cmd, NULL);
613
614 ret = 0;
615 out_ops:
616 ethnl_ops_complete(req_info.dev);
617 out_rtnl:
618 rtnl_unlock();
619 out_dev:
620 ethnl_parse_header_dev_put(&req_info);
621 return ret;
622 }
623
624 static const struct ethnl_request_ops *
625 ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
626 [ETHTOOL_MSG_LINKINFO_NTF] = &ethnl_linkinfo_request_ops,
627 [ETHTOOL_MSG_LINKMODES_NTF] = &ethnl_linkmodes_request_ops,
628 [ETHTOOL_MSG_DEBUG_NTF] = &ethnl_debug_request_ops,
629 [ETHTOOL_MSG_WOL_NTF] = &ethnl_wol_request_ops,
630 [ETHTOOL_MSG_FEATURES_NTF] = &ethnl_features_request_ops,
631 [ETHTOOL_MSG_PRIVFLAGS_NTF] = &ethnl_privflags_request_ops,
632 [ETHTOOL_MSG_RINGS_NTF] = &ethnl_rings_request_ops,
633 [ETHTOOL_MSG_CHANNELS_NTF] = &ethnl_channels_request_ops,
634 [ETHTOOL_MSG_COALESCE_NTF] = &ethnl_coalesce_request_ops,
635 [ETHTOOL_MSG_PAUSE_NTF] = &ethnl_pause_request_ops,
636 [ETHTOOL_MSG_EEE_NTF] = &ethnl_eee_request_ops,
637 [ETHTOOL_MSG_FEC_NTF] = &ethnl_fec_request_ops,
638 [ETHTOOL_MSG_MODULE_NTF] = &ethnl_module_request_ops,
639 [ETHTOOL_MSG_PLCA_NTF] = &ethnl_plca_cfg_request_ops,
640 [ETHTOOL_MSG_MM_NTF] = &ethnl_mm_request_ops,
641 };
642
643 /* default notification handler */
644 static void ethnl_default_notify(struct net_device *dev, unsigned int cmd,
645 const void *data)
646 {
647 struct ethnl_reply_data *reply_data;
648 const struct ethnl_request_ops *ops;
649 struct ethnl_req_info *req_info;
650 struct genl_info info;
651 struct sk_buff *skb;
652 void *reply_payload;
653 int reply_len;
654 int ret;
655
656 genl_info_init_ntf(&info, &ethtool_genl_family, cmd);
657
658 if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX ||
659 !ethnl_default_notify_ops[cmd],
660 "unexpected notification type %u\n", cmd))
661 return;
662 ops = ethnl_default_notify_ops[cmd];
663 req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
664 if (!req_info)
665 return;
666 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
667 if (!reply_data) {
668 kfree(req_info);
669 return;
670 }
671
672 req_info->dev = dev;
673 req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS;
674
675 ethnl_init_reply_data(reply_data, ops, dev);
676 ret = ops->prepare_data(req_info, reply_data, &info);
677 if (ret < 0)
678 goto err_cleanup;
679 ret = ops->reply_size(req_info, reply_data);
680 if (ret < 0)
681 goto err_cleanup;
682 reply_len = ret + ethnl_reply_header_size();
683 skb = genlmsg_new(reply_len, GFP_KERNEL);
684 if (!skb)
685 goto err_cleanup;
686 reply_payload = ethnl_bcastmsg_put(skb, cmd);
687 if (!reply_payload)
688 goto err_skb;
689 ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr);
690 if (ret < 0)
691 goto err_msg;
692 ret = ops->fill_reply(skb, req_info, reply_data);
693 if (ret < 0)
694 goto err_msg;
695 if (ops->cleanup_data)
696 ops->cleanup_data(reply_data);
697
698 genlmsg_end(skb, reply_payload);
699 kfree(reply_data);
700 kfree(req_info);
701 ethnl_multicast(skb, dev);
702 return;
703
704 err_msg:
705 WARN_ONCE(ret == -EMSGSIZE,
706 "calculated message payload length (%d) not sufficient\n",
707 reply_len);
708 err_skb:
709 nlmsg_free(skb);
710 err_cleanup:
711 if (ops->cleanup_data)
712 ops->cleanup_data(reply_data);
713 kfree(reply_data);
714 kfree(req_info);
715 return;
716 }
717
718 /* notifications */
719
720 typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd,
721 const void *data);
722
723 static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
724 [ETHTOOL_MSG_LINKINFO_NTF] = ethnl_default_notify,
725 [ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify,
726 [ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify,
727 [ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify,
728 [ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify,
729 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify,
730 [ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify,
731 [ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify,
732 [ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify,
733 [ETHTOOL_MSG_PAUSE_NTF] = ethnl_default_notify,
734 [ETHTOOL_MSG_EEE_NTF] = ethnl_default_notify,
735 [ETHTOOL_MSG_FEC_NTF] = ethnl_default_notify,
736 [ETHTOOL_MSG_MODULE_NTF] = ethnl_default_notify,
737 [ETHTOOL_MSG_PLCA_NTF] = ethnl_default_notify,
738 [ETHTOOL_MSG_MM_NTF] = ethnl_default_notify,
739 };
740
741 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
742 {
743 if (unlikely(!ethnl_ok))
744 return;
745 ASSERT_RTNL();
746
747 if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) &&
748 ethnl_notify_handlers[cmd]))
749 ethnl_notify_handlers[cmd](dev, cmd, data);
750 else
751 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n",
752 cmd, netdev_name(dev));
753 }
754 EXPORT_SYMBOL(ethtool_notify);
755
756 static void ethnl_notify_features(struct netdev_notifier_info *info)
757 {
758 struct net_device *dev = netdev_notifier_info_to_dev(info);
759
760 ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL);
761 }
762
763 static int ethnl_netdev_event(struct notifier_block *this, unsigned long event,
764 void *ptr)
765 {
766 switch (event) {
767 case NETDEV_FEAT_CHANGE:
768 ethnl_notify_features(ptr);
769 break;
770 }
771
772 return NOTIFY_DONE;
773 }
774
775 static struct notifier_block ethnl_netdev_notifier = {
776 .notifier_call = ethnl_netdev_event,
777 };
778
779 /* genetlink setup */
780
781 static const struct genl_ops ethtool_genl_ops[] = {
782 {
783 .cmd = ETHTOOL_MSG_STRSET_GET,
784 .doit = ethnl_default_doit,
785 .start = ethnl_default_start,
786 .dumpit = ethnl_default_dumpit,
787 .done = ethnl_default_done,
788 .policy = ethnl_strset_get_policy,
789 .maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1,
790 },
791 {
792 .cmd = ETHTOOL_MSG_LINKINFO_GET,
793 .doit = ethnl_default_doit,
794 .start = ethnl_default_start,
795 .dumpit = ethnl_default_dumpit,
796 .done = ethnl_default_done,
797 .policy = ethnl_linkinfo_get_policy,
798 .maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1,
799 },
800 {
801 .cmd = ETHTOOL_MSG_LINKINFO_SET,
802 .flags = GENL_UNS_ADMIN_PERM,
803 .doit = ethnl_default_set_doit,
804 .policy = ethnl_linkinfo_set_policy,
805 .maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1,
806 },
807 {
808 .cmd = ETHTOOL_MSG_LINKMODES_GET,
809 .doit = ethnl_default_doit,
810 .start = ethnl_default_start,
811 .dumpit = ethnl_default_dumpit,
812 .done = ethnl_default_done,
813 .policy = ethnl_linkmodes_get_policy,
814 .maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1,
815 },
816 {
817 .cmd = ETHTOOL_MSG_LINKMODES_SET,
818 .flags = GENL_UNS_ADMIN_PERM,
819 .doit = ethnl_default_set_doit,
820 .policy = ethnl_linkmodes_set_policy,
821 .maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1,
822 },
823 {
824 .cmd = ETHTOOL_MSG_LINKSTATE_GET,
825 .doit = ethnl_default_doit,
826 .start = ethnl_default_start,
827 .dumpit = ethnl_default_dumpit,
828 .done = ethnl_default_done,
829 .policy = ethnl_linkstate_get_policy,
830 .maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1,
831 },
832 {
833 .cmd = ETHTOOL_MSG_DEBUG_GET,
834 .doit = ethnl_default_doit,
835 .start = ethnl_default_start,
836 .dumpit = ethnl_default_dumpit,
837 .done = ethnl_default_done,
838 .policy = ethnl_debug_get_policy,
839 .maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1,
840 },
841 {
842 .cmd = ETHTOOL_MSG_DEBUG_SET,
843 .flags = GENL_UNS_ADMIN_PERM,
844 .doit = ethnl_default_set_doit,
845 .policy = ethnl_debug_set_policy,
846 .maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1,
847 },
848 {
849 .cmd = ETHTOOL_MSG_WOL_GET,
850 .flags = GENL_UNS_ADMIN_PERM,
851 .doit = ethnl_default_doit,
852 .start = ethnl_default_start,
853 .dumpit = ethnl_default_dumpit,
854 .done = ethnl_default_done,
855 .policy = ethnl_wol_get_policy,
856 .maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1,
857 },
858 {
859 .cmd = ETHTOOL_MSG_WOL_SET,
860 .flags = GENL_UNS_ADMIN_PERM,
861 .doit = ethnl_default_set_doit,
862 .policy = ethnl_wol_set_policy,
863 .maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1,
864 },
865 {
866 .cmd = ETHTOOL_MSG_FEATURES_GET,
867 .doit = ethnl_default_doit,
868 .start = ethnl_default_start,
869 .dumpit = ethnl_default_dumpit,
870 .done = ethnl_default_done,
871 .policy = ethnl_features_get_policy,
872 .maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1,
873 },
874 {
875 .cmd = ETHTOOL_MSG_FEATURES_SET,
876 .flags = GENL_UNS_ADMIN_PERM,
877 .doit = ethnl_set_features,
878 .policy = ethnl_features_set_policy,
879 .maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1,
880 },
881 {
882 .cmd = ETHTOOL_MSG_PRIVFLAGS_GET,
883 .doit = ethnl_default_doit,
884 .start = ethnl_default_start,
885 .dumpit = ethnl_default_dumpit,
886 .done = ethnl_default_done,
887 .policy = ethnl_privflags_get_policy,
888 .maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1,
889 },
890 {
891 .cmd = ETHTOOL_MSG_PRIVFLAGS_SET,
892 .flags = GENL_UNS_ADMIN_PERM,
893 .doit = ethnl_default_set_doit,
894 .policy = ethnl_privflags_set_policy,
895 .maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1,
896 },
897 {
898 .cmd = ETHTOOL_MSG_RINGS_GET,
899 .doit = ethnl_default_doit,
900 .start = ethnl_default_start,
901 .dumpit = ethnl_default_dumpit,
902 .done = ethnl_default_done,
903 .policy = ethnl_rings_get_policy,
904 .maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1,
905 },
906 {
907 .cmd = ETHTOOL_MSG_RINGS_SET,
908 .flags = GENL_UNS_ADMIN_PERM,
909 .doit = ethnl_default_set_doit,
910 .policy = ethnl_rings_set_policy,
911 .maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1,
912 },
913 {
914 .cmd = ETHTOOL_MSG_CHANNELS_GET,
915 .doit = ethnl_default_doit,
916 .start = ethnl_default_start,
917 .dumpit = ethnl_default_dumpit,
918 .done = ethnl_default_done,
919 .policy = ethnl_channels_get_policy,
920 .maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1,
921 },
922 {
923 .cmd = ETHTOOL_MSG_CHANNELS_SET,
924 .flags = GENL_UNS_ADMIN_PERM,
925 .doit = ethnl_default_set_doit,
926 .policy = ethnl_channels_set_policy,
927 .maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1,
928 },
929 {
930 .cmd = ETHTOOL_MSG_COALESCE_GET,
931 .doit = ethnl_default_doit,
932 .start = ethnl_default_start,
933 .dumpit = ethnl_default_dumpit,
934 .done = ethnl_default_done,
935 .policy = ethnl_coalesce_get_policy,
936 .maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1,
937 },
938 {
939 .cmd = ETHTOOL_MSG_COALESCE_SET,
940 .flags = GENL_UNS_ADMIN_PERM,
941 .doit = ethnl_default_set_doit,
942 .policy = ethnl_coalesce_set_policy,
943 .maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1,
944 },
945 {
946 .cmd = ETHTOOL_MSG_PAUSE_GET,
947 .doit = ethnl_default_doit,
948 .start = ethnl_default_start,
949 .dumpit = ethnl_default_dumpit,
950 .done = ethnl_default_done,
951 .policy = ethnl_pause_get_policy,
952 .maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1,
953 },
954 {
955 .cmd = ETHTOOL_MSG_PAUSE_SET,
956 .flags = GENL_UNS_ADMIN_PERM,
957 .doit = ethnl_default_set_doit,
958 .policy = ethnl_pause_set_policy,
959 .maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1,
960 },
961 {
962 .cmd = ETHTOOL_MSG_EEE_GET,
963 .doit = ethnl_default_doit,
964 .start = ethnl_default_start,
965 .dumpit = ethnl_default_dumpit,
966 .done = ethnl_default_done,
967 .policy = ethnl_eee_get_policy,
968 .maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1,
969 },
970 {
971 .cmd = ETHTOOL_MSG_EEE_SET,
972 .flags = GENL_UNS_ADMIN_PERM,
973 .doit = ethnl_default_set_doit,
974 .policy = ethnl_eee_set_policy,
975 .maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1,
976 },
977 {
978 .cmd = ETHTOOL_MSG_TSINFO_GET,
979 .doit = ethnl_default_doit,
980 .start = ethnl_default_start,
981 .dumpit = ethnl_default_dumpit,
982 .done = ethnl_default_done,
983 .policy = ethnl_tsinfo_get_policy,
984 .maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1,
985 },
986 {
987 .cmd = ETHTOOL_MSG_CABLE_TEST_ACT,
988 .flags = GENL_UNS_ADMIN_PERM,
989 .doit = ethnl_act_cable_test,
990 .policy = ethnl_cable_test_act_policy,
991 .maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1,
992 },
993 {
994 .cmd = ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
995 .flags = GENL_UNS_ADMIN_PERM,
996 .doit = ethnl_act_cable_test_tdr,
997 .policy = ethnl_cable_test_tdr_act_policy,
998 .maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1,
999 },
1000 {
1001 .cmd = ETHTOOL_MSG_TUNNEL_INFO_GET,
1002 .doit = ethnl_tunnel_info_doit,
1003 .start = ethnl_tunnel_info_start,
1004 .dumpit = ethnl_tunnel_info_dumpit,
1005 .policy = ethnl_tunnel_info_get_policy,
1006 .maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1,
1007 },
1008 {
1009 .cmd = ETHTOOL_MSG_FEC_GET,
1010 .doit = ethnl_default_doit,
1011 .start = ethnl_default_start,
1012 .dumpit = ethnl_default_dumpit,
1013 .done = ethnl_default_done,
1014 .policy = ethnl_fec_get_policy,
1015 .maxattr = ARRAY_SIZE(ethnl_fec_get_policy) - 1,
1016 },
1017 {
1018 .cmd = ETHTOOL_MSG_FEC_SET,
1019 .flags = GENL_UNS_ADMIN_PERM,
1020 .doit = ethnl_default_set_doit,
1021 .policy = ethnl_fec_set_policy,
1022 .maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1,
1023 },
1024 {
1025 .cmd = ETHTOOL_MSG_MODULE_EEPROM_GET,
1026 .flags = GENL_UNS_ADMIN_PERM,
1027 .doit = ethnl_default_doit,
1028 .start = ethnl_default_start,
1029 .dumpit = ethnl_default_dumpit,
1030 .done = ethnl_default_done,
1031 .policy = ethnl_module_eeprom_get_policy,
1032 .maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1,
1033 },
1034 {
1035 .cmd = ETHTOOL_MSG_STATS_GET,
1036 .doit = ethnl_default_doit,
1037 .start = ethnl_default_start,
1038 .dumpit = ethnl_default_dumpit,
1039 .done = ethnl_default_done,
1040 .policy = ethnl_stats_get_policy,
1041 .maxattr = ARRAY_SIZE(ethnl_stats_get_policy) - 1,
1042 },
1043 {
1044 .cmd = ETHTOOL_MSG_PHC_VCLOCKS_GET,
1045 .doit = ethnl_default_doit,
1046 .start = ethnl_default_start,
1047 .dumpit = ethnl_default_dumpit,
1048 .done = ethnl_default_done,
1049 .policy = ethnl_phc_vclocks_get_policy,
1050 .maxattr = ARRAY_SIZE(ethnl_phc_vclocks_get_policy) - 1,
1051 },
1052 {
1053 .cmd = ETHTOOL_MSG_MODULE_GET,
1054 .doit = ethnl_default_doit,
1055 .start = ethnl_default_start,
1056 .dumpit = ethnl_default_dumpit,
1057 .done = ethnl_default_done,
1058 .policy = ethnl_module_get_policy,
1059 .maxattr = ARRAY_SIZE(ethnl_module_get_policy) - 1,
1060 },
1061 {
1062 .cmd = ETHTOOL_MSG_MODULE_SET,
1063 .flags = GENL_UNS_ADMIN_PERM,
1064 .doit = ethnl_default_set_doit,
1065 .policy = ethnl_module_set_policy,
1066 .maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1,
1067 },
1068 {
1069 .cmd = ETHTOOL_MSG_PSE_GET,
1070 .doit = ethnl_default_doit,
1071 .start = ethnl_default_start,
1072 .dumpit = ethnl_default_dumpit,
1073 .done = ethnl_default_done,
1074 .policy = ethnl_pse_get_policy,
1075 .maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1,
1076 },
1077 {
1078 .cmd = ETHTOOL_MSG_PSE_SET,
1079 .flags = GENL_UNS_ADMIN_PERM,
1080 .doit = ethnl_default_set_doit,
1081 .policy = ethnl_pse_set_policy,
1082 .maxattr = ARRAY_SIZE(ethnl_pse_set_policy) - 1,
1083 },
1084 {
1085 .cmd = ETHTOOL_MSG_RSS_GET,
1086 .doit = ethnl_default_doit,
1087 .policy = ethnl_rss_get_policy,
1088 .maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1,
1089 },
1090 {
1091 .cmd = ETHTOOL_MSG_PLCA_GET_CFG,
1092 .doit = ethnl_default_doit,
1093 .start = ethnl_default_start,
1094 .dumpit = ethnl_default_dumpit,
1095 .done = ethnl_default_done,
1096 .policy = ethnl_plca_get_cfg_policy,
1097 .maxattr = ARRAY_SIZE(ethnl_plca_get_cfg_policy) - 1,
1098 },
1099 {
1100 .cmd = ETHTOOL_MSG_PLCA_SET_CFG,
1101 .flags = GENL_UNS_ADMIN_PERM,
1102 .doit = ethnl_default_set_doit,
1103 .policy = ethnl_plca_set_cfg_policy,
1104 .maxattr = ARRAY_SIZE(ethnl_plca_set_cfg_policy) - 1,
1105 },
1106 {
1107 .cmd = ETHTOOL_MSG_PLCA_GET_STATUS,
1108 .doit = ethnl_default_doit,
1109 .start = ethnl_default_start,
1110 .dumpit = ethnl_default_dumpit,
1111 .done = ethnl_default_done,
1112 .policy = ethnl_plca_get_status_policy,
1113 .maxattr = ARRAY_SIZE(ethnl_plca_get_status_policy) - 1,
1114 },
1115 {
1116 .cmd = ETHTOOL_MSG_MM_GET,
1117 .doit = ethnl_default_doit,
1118 .start = ethnl_default_start,
1119 .dumpit = ethnl_default_dumpit,
1120 .done = ethnl_default_done,
1121 .policy = ethnl_mm_get_policy,
1122 .maxattr = ARRAY_SIZE(ethnl_mm_get_policy) - 1,
1123 },
1124 {
1125 .cmd = ETHTOOL_MSG_MM_SET,
1126 .flags = GENL_UNS_ADMIN_PERM,
1127 .doit = ethnl_default_set_doit,
1128 .policy = ethnl_mm_set_policy,
1129 .maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1,
1130 },
1131 };
1132
1133 static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
1134 [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME },
1135 };
1136
1137 static struct genl_family ethtool_genl_family __ro_after_init = {
1138 .name = ETHTOOL_GENL_NAME,
1139 .version = ETHTOOL_GENL_VERSION,
1140 .netnsok = true,
1141 .parallel_ops = true,
1142 .ops = ethtool_genl_ops,
1143 .n_ops = ARRAY_SIZE(ethtool_genl_ops),
1144 .resv_start_op = ETHTOOL_MSG_MODULE_GET + 1,
1145 .mcgrps = ethtool_nl_mcgrps,
1146 .n_mcgrps = ARRAY_SIZE(ethtool_nl_mcgrps),
1147 };
1148
1149 /* module setup */
1150
1151 static int __init ethnl_init(void)
1152 {
1153 int ret;
1154
1155 ret = genl_register_family(&ethtool_genl_family);
1156 if (WARN(ret < 0, "ethtool: genetlink family registration failed"))
1157 return ret;
1158 ethnl_ok = true;
1159
1160 ret = register_netdevice_notifier(&ethnl_netdev_notifier);
1161 WARN(ret < 0, "ethtool: net device notifier registration failed");
1162 return ret;
1163 }
1164
1165 subsys_initcall(ethnl_init);
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git