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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
8static struct genl_family ethtool_genl_family;
9
10static bool ethnl_ok __read_mostly;
11static 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
17const 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
25const 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
33int 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;
56err:
57 if (dev->dev.parent)
58 pm_runtime_put(dev->dev.parent);
59
60 return ret;
61}
62
63void 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 */
88int 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 */
163int 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
184nla_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 */
200struct 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, ðtool_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
222err_free:
223 nlmsg_free(skb);
224err:
225 if (info)
226 GENL_SET_ERR_MSG(info, "failed to setup reply message");
227 return NULL;
228}
229
230void *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 ðtool_genl_family, 0, cmd);
234}
235
236void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd)
237{
238 return genlmsg_put(skb, 0, ++ethnl_bcast_seq, ðtool_genl_family, 0,
239 cmd);
240}
241
242int ethnl_multicast(struct sk_buff *skb, struct net_device *dev)
243{
244 return genlmsg_multicast_netns(ðtool_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 */
261struct 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
268static const struct ethnl_request_ops *
269ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
270 [ETHTOOL_MSG_STRSET_GET] = ðnl_strset_request_ops,
271 [ETHTOOL_MSG_LINKINFO_GET] = ðnl_linkinfo_request_ops,
272 [ETHTOOL_MSG_LINKINFO_SET] = ðnl_linkinfo_request_ops,
273 [ETHTOOL_MSG_LINKMODES_GET] = ðnl_linkmodes_request_ops,
274 [ETHTOOL_MSG_LINKMODES_SET] = ðnl_linkmodes_request_ops,
275 [ETHTOOL_MSG_LINKSTATE_GET] = ðnl_linkstate_request_ops,
276 [ETHTOOL_MSG_DEBUG_GET] = ðnl_debug_request_ops,
277 [ETHTOOL_MSG_DEBUG_SET] = ðnl_debug_request_ops,
278 [ETHTOOL_MSG_WOL_GET] = ðnl_wol_request_ops,
279 [ETHTOOL_MSG_WOL_SET] = ðnl_wol_request_ops,
280 [ETHTOOL_MSG_FEATURES_GET] = ðnl_features_request_ops,
281 [ETHTOOL_MSG_PRIVFLAGS_GET] = ðnl_privflags_request_ops,
282 [ETHTOOL_MSG_PRIVFLAGS_SET] = ðnl_privflags_request_ops,
283 [ETHTOOL_MSG_RINGS_GET] = ðnl_rings_request_ops,
284 [ETHTOOL_MSG_RINGS_SET] = ðnl_rings_request_ops,
285 [ETHTOOL_MSG_CHANNELS_GET] = ðnl_channels_request_ops,
286 [ETHTOOL_MSG_CHANNELS_SET] = ðnl_channels_request_ops,
287 [ETHTOOL_MSG_COALESCE_GET] = ðnl_coalesce_request_ops,
288 [ETHTOOL_MSG_COALESCE_SET] = ðnl_coalesce_request_ops,
289 [ETHTOOL_MSG_PAUSE_GET] = ðnl_pause_request_ops,
290 [ETHTOOL_MSG_PAUSE_SET] = ðnl_pause_request_ops,
291 [ETHTOOL_MSG_EEE_GET] = ðnl_eee_request_ops,
292 [ETHTOOL_MSG_EEE_SET] = ðnl_eee_request_ops,
293 [ETHTOOL_MSG_FEC_GET] = ðnl_fec_request_ops,
294 [ETHTOOL_MSG_FEC_SET] = ðnl_fec_request_ops,
295 [ETHTOOL_MSG_TSINFO_GET] = ðnl_tsinfo_request_ops,
296 [ETHTOOL_MSG_MODULE_EEPROM_GET] = ðnl_module_eeprom_request_ops,
297 [ETHTOOL_MSG_STATS_GET] = ðnl_stats_request_ops,
298 [ETHTOOL_MSG_PHC_VCLOCKS_GET] = ðnl_phc_vclocks_request_ops,
299 [ETHTOOL_MSG_MODULE_GET] = ðnl_module_request_ops,
300 [ETHTOOL_MSG_MODULE_SET] = ðnl_module_request_ops,
301 [ETHTOOL_MSG_PSE_GET] = ðnl_pse_request_ops,
302 [ETHTOOL_MSG_PSE_SET] = ðnl_pse_request_ops,
303 [ETHTOOL_MSG_RSS_GET] = ðnl_rss_request_ops,
304 [ETHTOOL_MSG_PLCA_GET_CFG] = ðnl_plca_cfg_request_ops,
305 [ETHTOOL_MSG_PLCA_SET_CFG] = ðnl_plca_cfg_request_ops,
306 [ETHTOOL_MSG_PLCA_GET_STATUS] = ðnl_plca_status_request_ops,
307 [ETHTOOL_MSG_MM_GET] = ðnl_mm_request_ops,
308 [ETHTOOL_MSG_MM_SET] = ðnl_mm_request_ops,
309};
310
311static 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 */
328static 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 */
361static 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 */
370static 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
432err_msg:
433 WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len);
434 nlmsg_free(rskb);
435err_cleanup:
436 if (ops->cleanup_data)
437 ops->cleanup_data(reply_data);
438err_dev:
439 netdev_put(req_info->dev, &req_info->dev_tracker);
440 kfree(reply_data);
441 kfree(req_info);
442 return ret;
443}
444
445static 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 ðtool_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
469out:
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 */
485static 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 ret = 0;
509 }
510 rtnl_unlock();
511
512 return ret;
513}
514
515/* generic ->start() handler for GET requests */
516static int ethnl_default_start(struct netlink_callback *cb)
517{
518 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
519 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
520 struct ethnl_reply_data *reply_data;
521 const struct ethnl_request_ops *ops;
522 struct ethnl_req_info *req_info;
523 struct genlmsghdr *ghdr;
524 int ret;
525
526 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
527
528 ghdr = nlmsg_data(cb->nlh);
529 ops = ethnl_default_requests[ghdr->cmd];
530 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd))
531 return -EOPNOTSUPP;
532 req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
533 if (!req_info)
534 return -ENOMEM;
535 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
536 if (!reply_data) {
537 ret = -ENOMEM;
538 goto free_req_info;
539 }
540
541 ret = ethnl_default_parse(req_info, &info->info, ops, false);
542 if (req_info->dev) {
543 /* We ignore device specification in dump requests but as the
544 * same parser as for non-dump (doit) requests is used, it
545 * would take reference to the device if it finds one
546 */
547 netdev_put(req_info->dev, &req_info->dev_tracker);
548 req_info->dev = NULL;
549 }
550 if (ret < 0)
551 goto free_reply_data;
552
553 ctx->ops = ops;
554 ctx->req_info = req_info;
555 ctx->reply_data = reply_data;
556 ctx->pos_ifindex = 0;
557
558 return 0;
559
560free_reply_data:
561 kfree(reply_data);
562free_req_info:
563 kfree(req_info);
564
565 return ret;
566}
567
568/* default ->done() handler for GET requests */
569static int ethnl_default_done(struct netlink_callback *cb)
570{
571 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
572
573 kfree(ctx->reply_data);
574 kfree(ctx->req_info);
575
576 return 0;
577}
578
579static int ethnl_default_set_doit(struct sk_buff *skb, struct genl_info *info)
580{
581 const struct ethnl_request_ops *ops;
582 struct ethnl_req_info req_info = {};
583 const u8 cmd = info->genlhdr->cmd;
584 int ret;
585
586 ops = ethnl_default_requests[cmd];
587 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
588 return -EOPNOTSUPP;
589 if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr))
590 return -EINVAL;
591
592 ret = ethnl_parse_header_dev_get(&req_info, info->attrs[ops->hdr_attr],
593 genl_info_net(info), info->extack,
594 true);
595 if (ret < 0)
596 return ret;
597
598 if (ops->set_validate) {
599 ret = ops->set_validate(&req_info, info);
600 /* 0 means nothing to do */
601 if (ret <= 0)
602 goto out_dev;
603 }
604
605 rtnl_lock();
606 ret = ethnl_ops_begin(req_info.dev);
607 if (ret < 0)
608 goto out_rtnl;
609
610 ret = ops->set(&req_info, info);
611 if (ret <= 0)
612 goto out_ops;
613 ethtool_notify(req_info.dev, ops->set_ntf_cmd, NULL);
614
615 ret = 0;
616out_ops:
617 ethnl_ops_complete(req_info.dev);
618out_rtnl:
619 rtnl_unlock();
620out_dev:
621 ethnl_parse_header_dev_put(&req_info);
622 return ret;
623}
624
625static const struct ethnl_request_ops *
626ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
627 [ETHTOOL_MSG_LINKINFO_NTF] = ðnl_linkinfo_request_ops,
628 [ETHTOOL_MSG_LINKMODES_NTF] = ðnl_linkmodes_request_ops,
629 [ETHTOOL_MSG_DEBUG_NTF] = ðnl_debug_request_ops,
630 [ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops,
631 [ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops,
632 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ðnl_privflags_request_ops,
633 [ETHTOOL_MSG_RINGS_NTF] = ðnl_rings_request_ops,
634 [ETHTOOL_MSG_CHANNELS_NTF] = ðnl_channels_request_ops,
635 [ETHTOOL_MSG_COALESCE_NTF] = ðnl_coalesce_request_ops,
636 [ETHTOOL_MSG_PAUSE_NTF] = ðnl_pause_request_ops,
637 [ETHTOOL_MSG_EEE_NTF] = ðnl_eee_request_ops,
638 [ETHTOOL_MSG_FEC_NTF] = ðnl_fec_request_ops,
639 [ETHTOOL_MSG_MODULE_NTF] = ðnl_module_request_ops,
640 [ETHTOOL_MSG_PLCA_NTF] = ðnl_plca_cfg_request_ops,
641 [ETHTOOL_MSG_MM_NTF] = ðnl_mm_request_ops,
642};
643
644/* default notification handler */
645static void ethnl_default_notify(struct net_device *dev, unsigned int cmd,
646 const void *data)
647{
648 struct ethnl_reply_data *reply_data;
649 const struct ethnl_request_ops *ops;
650 struct ethnl_req_info *req_info;
651 struct genl_info info;
652 struct sk_buff *skb;
653 void *reply_payload;
654 int reply_len;
655 int ret;
656
657 genl_info_init_ntf(&info, ðtool_genl_family, cmd);
658
659 if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX ||
660 !ethnl_default_notify_ops[cmd],
661 "unexpected notification type %u\n", cmd))
662 return;
663 ops = ethnl_default_notify_ops[cmd];
664 req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
665 if (!req_info)
666 return;
667 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
668 if (!reply_data) {
669 kfree(req_info);
670 return;
671 }
672
673 req_info->dev = dev;
674 req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS;
675
676 ethnl_init_reply_data(reply_data, ops, dev);
677 ret = ops->prepare_data(req_info, reply_data, &info);
678 if (ret < 0)
679 goto err_cleanup;
680 ret = ops->reply_size(req_info, reply_data);
681 if (ret < 0)
682 goto err_cleanup;
683 reply_len = ret + ethnl_reply_header_size();
684 skb = genlmsg_new(reply_len, GFP_KERNEL);
685 if (!skb)
686 goto err_cleanup;
687 reply_payload = ethnl_bcastmsg_put(skb, cmd);
688 if (!reply_payload)
689 goto err_skb;
690 ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr);
691 if (ret < 0)
692 goto err_msg;
693 ret = ops->fill_reply(skb, req_info, reply_data);
694 if (ret < 0)
695 goto err_msg;
696 if (ops->cleanup_data)
697 ops->cleanup_data(reply_data);
698
699 genlmsg_end(skb, reply_payload);
700 kfree(reply_data);
701 kfree(req_info);
702 ethnl_multicast(skb, dev);
703 return;
704
705err_msg:
706 WARN_ONCE(ret == -EMSGSIZE,
707 "calculated message payload length (%d) not sufficient\n",
708 reply_len);
709err_skb:
710 nlmsg_free(skb);
711err_cleanup:
712 if (ops->cleanup_data)
713 ops->cleanup_data(reply_data);
714 kfree(reply_data);
715 kfree(req_info);
716 return;
717}
718
719/* notifications */
720
721typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd,
722 const void *data);
723
724static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
725 [ETHTOOL_MSG_LINKINFO_NTF] = ethnl_default_notify,
726 [ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify,
727 [ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify,
728 [ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify,
729 [ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify,
730 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify,
731 [ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify,
732 [ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify,
733 [ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify,
734 [ETHTOOL_MSG_PAUSE_NTF] = ethnl_default_notify,
735 [ETHTOOL_MSG_EEE_NTF] = ethnl_default_notify,
736 [ETHTOOL_MSG_FEC_NTF] = ethnl_default_notify,
737 [ETHTOOL_MSG_MODULE_NTF] = ethnl_default_notify,
738 [ETHTOOL_MSG_PLCA_NTF] = ethnl_default_notify,
739 [ETHTOOL_MSG_MM_NTF] = ethnl_default_notify,
740};
741
742void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
743{
744 if (unlikely(!ethnl_ok))
745 return;
746 ASSERT_RTNL();
747
748 if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) &&
749 ethnl_notify_handlers[cmd]))
750 ethnl_notify_handlers[cmd](dev, cmd, data);
751 else
752 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n",
753 cmd, netdev_name(dev));
754}
755EXPORT_SYMBOL(ethtool_notify);
756
757static void ethnl_notify_features(struct netdev_notifier_info *info)
758{
759 struct net_device *dev = netdev_notifier_info_to_dev(info);
760
761 ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL);
762}
763
764static int ethnl_netdev_event(struct notifier_block *this, unsigned long event,
765 void *ptr)
766{
767 switch (event) {
768 case NETDEV_FEAT_CHANGE:
769 ethnl_notify_features(ptr);
770 break;
771 }
772
773 return NOTIFY_DONE;
774}
775
776static struct notifier_block ethnl_netdev_notifier = {
777 .notifier_call = ethnl_netdev_event,
778};
779
780/* genetlink setup */
781
782static const struct genl_ops ethtool_genl_ops[] = {
783 {
784 .cmd = ETHTOOL_MSG_STRSET_GET,
785 .doit = ethnl_default_doit,
786 .start = ethnl_default_start,
787 .dumpit = ethnl_default_dumpit,
788 .done = ethnl_default_done,
789 .policy = ethnl_strset_get_policy,
790 .maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1,
791 },
792 {
793 .cmd = ETHTOOL_MSG_LINKINFO_GET,
794 .doit = ethnl_default_doit,
795 .start = ethnl_default_start,
796 .dumpit = ethnl_default_dumpit,
797 .done = ethnl_default_done,
798 .policy = ethnl_linkinfo_get_policy,
799 .maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1,
800 },
801 {
802 .cmd = ETHTOOL_MSG_LINKINFO_SET,
803 .flags = GENL_UNS_ADMIN_PERM,
804 .doit = ethnl_default_set_doit,
805 .policy = ethnl_linkinfo_set_policy,
806 .maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1,
807 },
808 {
809 .cmd = ETHTOOL_MSG_LINKMODES_GET,
810 .doit = ethnl_default_doit,
811 .start = ethnl_default_start,
812 .dumpit = ethnl_default_dumpit,
813 .done = ethnl_default_done,
814 .policy = ethnl_linkmodes_get_policy,
815 .maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1,
816 },
817 {
818 .cmd = ETHTOOL_MSG_LINKMODES_SET,
819 .flags = GENL_UNS_ADMIN_PERM,
820 .doit = ethnl_default_set_doit,
821 .policy = ethnl_linkmodes_set_policy,
822 .maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1,
823 },
824 {
825 .cmd = ETHTOOL_MSG_LINKSTATE_GET,
826 .doit = ethnl_default_doit,
827 .start = ethnl_default_start,
828 .dumpit = ethnl_default_dumpit,
829 .done = ethnl_default_done,
830 .policy = ethnl_linkstate_get_policy,
831 .maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1,
832 },
833 {
834 .cmd = ETHTOOL_MSG_DEBUG_GET,
835 .doit = ethnl_default_doit,
836 .start = ethnl_default_start,
837 .dumpit = ethnl_default_dumpit,
838 .done = ethnl_default_done,
839 .policy = ethnl_debug_get_policy,
840 .maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1,
841 },
842 {
843 .cmd = ETHTOOL_MSG_DEBUG_SET,
844 .flags = GENL_UNS_ADMIN_PERM,
845 .doit = ethnl_default_set_doit,
846 .policy = ethnl_debug_set_policy,
847 .maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1,
848 },
849 {
850 .cmd = ETHTOOL_MSG_WOL_GET,
851 .flags = GENL_UNS_ADMIN_PERM,
852 .doit = ethnl_default_doit,
853 .start = ethnl_default_start,
854 .dumpit = ethnl_default_dumpit,
855 .done = ethnl_default_done,
856 .policy = ethnl_wol_get_policy,
857 .maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1,
858 },
859 {
860 .cmd = ETHTOOL_MSG_WOL_SET,
861 .flags = GENL_UNS_ADMIN_PERM,
862 .doit = ethnl_default_set_doit,
863 .policy = ethnl_wol_set_policy,
864 .maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1,
865 },
866 {
867 .cmd = ETHTOOL_MSG_FEATURES_GET,
868 .doit = ethnl_default_doit,
869 .start = ethnl_default_start,
870 .dumpit = ethnl_default_dumpit,
871 .done = ethnl_default_done,
872 .policy = ethnl_features_get_policy,
873 .maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1,
874 },
875 {
876 .cmd = ETHTOOL_MSG_FEATURES_SET,
877 .flags = GENL_UNS_ADMIN_PERM,
878 .doit = ethnl_set_features,
879 .policy = ethnl_features_set_policy,
880 .maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1,
881 },
882 {
883 .cmd = ETHTOOL_MSG_PRIVFLAGS_GET,
884 .doit = ethnl_default_doit,
885 .start = ethnl_default_start,
886 .dumpit = ethnl_default_dumpit,
887 .done = ethnl_default_done,
888 .policy = ethnl_privflags_get_policy,
889 .maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1,
890 },
891 {
892 .cmd = ETHTOOL_MSG_PRIVFLAGS_SET,
893 .flags = GENL_UNS_ADMIN_PERM,
894 .doit = ethnl_default_set_doit,
895 .policy = ethnl_privflags_set_policy,
896 .maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1,
897 },
898 {
899 .cmd = ETHTOOL_MSG_RINGS_GET,
900 .doit = ethnl_default_doit,
901 .start = ethnl_default_start,
902 .dumpit = ethnl_default_dumpit,
903 .done = ethnl_default_done,
904 .policy = ethnl_rings_get_policy,
905 .maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1,
906 },
907 {
908 .cmd = ETHTOOL_MSG_RINGS_SET,
909 .flags = GENL_UNS_ADMIN_PERM,
910 .doit = ethnl_default_set_doit,
911 .policy = ethnl_rings_set_policy,
912 .maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1,
913 },
914 {
915 .cmd = ETHTOOL_MSG_CHANNELS_GET,
916 .doit = ethnl_default_doit,
917 .start = ethnl_default_start,
918 .dumpit = ethnl_default_dumpit,
919 .done = ethnl_default_done,
920 .policy = ethnl_channels_get_policy,
921 .maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1,
922 },
923 {
924 .cmd = ETHTOOL_MSG_CHANNELS_SET,
925 .flags = GENL_UNS_ADMIN_PERM,
926 .doit = ethnl_default_set_doit,
927 .policy = ethnl_channels_set_policy,
928 .maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1,
929 },
930 {
931 .cmd = ETHTOOL_MSG_COALESCE_GET,
932 .doit = ethnl_default_doit,
933 .start = ethnl_default_start,
934 .dumpit = ethnl_default_dumpit,
935 .done = ethnl_default_done,
936 .policy = ethnl_coalesce_get_policy,
937 .maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1,
938 },
939 {
940 .cmd = ETHTOOL_MSG_COALESCE_SET,
941 .flags = GENL_UNS_ADMIN_PERM,
942 .doit = ethnl_default_set_doit,
943 .policy = ethnl_coalesce_set_policy,
944 .maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1,
945 },
946 {
947 .cmd = ETHTOOL_MSG_PAUSE_GET,
948 .doit = ethnl_default_doit,
949 .start = ethnl_default_start,
950 .dumpit = ethnl_default_dumpit,
951 .done = ethnl_default_done,
952 .policy = ethnl_pause_get_policy,
953 .maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1,
954 },
955 {
956 .cmd = ETHTOOL_MSG_PAUSE_SET,
957 .flags = GENL_UNS_ADMIN_PERM,
958 .doit = ethnl_default_set_doit,
959 .policy = ethnl_pause_set_policy,
960 .maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1,
961 },
962 {
963 .cmd = ETHTOOL_MSG_EEE_GET,
964 .doit = ethnl_default_doit,
965 .start = ethnl_default_start,
966 .dumpit = ethnl_default_dumpit,
967 .done = ethnl_default_done,
968 .policy = ethnl_eee_get_policy,
969 .maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1,
970 },
971 {
972 .cmd = ETHTOOL_MSG_EEE_SET,
973 .flags = GENL_UNS_ADMIN_PERM,
974 .doit = ethnl_default_set_doit,
975 .policy = ethnl_eee_set_policy,
976 .maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1,
977 },
978 {
979 .cmd = ETHTOOL_MSG_TSINFO_GET,
980 .doit = ethnl_default_doit,
981 .start = ethnl_default_start,
982 .dumpit = ethnl_default_dumpit,
983 .done = ethnl_default_done,
984 .policy = ethnl_tsinfo_get_policy,
985 .maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1,
986 },
987 {
988 .cmd = ETHTOOL_MSG_CABLE_TEST_ACT,
989 .flags = GENL_UNS_ADMIN_PERM,
990 .doit = ethnl_act_cable_test,
991 .policy = ethnl_cable_test_act_policy,
992 .maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1,
993 },
994 {
995 .cmd = ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
996 .flags = GENL_UNS_ADMIN_PERM,
997 .doit = ethnl_act_cable_test_tdr,
998 .policy = ethnl_cable_test_tdr_act_policy,
999 .maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1,
1000 },
1001 {
1002 .cmd = ETHTOOL_MSG_TUNNEL_INFO_GET,
1003 .doit = ethnl_tunnel_info_doit,
1004 .start = ethnl_tunnel_info_start,
1005 .dumpit = ethnl_tunnel_info_dumpit,
1006 .policy = ethnl_tunnel_info_get_policy,
1007 .maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1,
1008 },
1009 {
1010 .cmd = ETHTOOL_MSG_FEC_GET,
1011 .doit = ethnl_default_doit,
1012 .start = ethnl_default_start,
1013 .dumpit = ethnl_default_dumpit,
1014 .done = ethnl_default_done,
1015 .policy = ethnl_fec_get_policy,
1016 .maxattr = ARRAY_SIZE(ethnl_fec_get_policy) - 1,
1017 },
1018 {
1019 .cmd = ETHTOOL_MSG_FEC_SET,
1020 .flags = GENL_UNS_ADMIN_PERM,
1021 .doit = ethnl_default_set_doit,
1022 .policy = ethnl_fec_set_policy,
1023 .maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1,
1024 },
1025 {
1026 .cmd = ETHTOOL_MSG_MODULE_EEPROM_GET,
1027 .flags = GENL_UNS_ADMIN_PERM,
1028 .doit = ethnl_default_doit,
1029 .start = ethnl_default_start,
1030 .dumpit = ethnl_default_dumpit,
1031 .done = ethnl_default_done,
1032 .policy = ethnl_module_eeprom_get_policy,
1033 .maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1,
1034 },
1035 {
1036 .cmd = ETHTOOL_MSG_STATS_GET,
1037 .doit = ethnl_default_doit,
1038 .start = ethnl_default_start,
1039 .dumpit = ethnl_default_dumpit,
1040 .done = ethnl_default_done,
1041 .policy = ethnl_stats_get_policy,
1042 .maxattr = ARRAY_SIZE(ethnl_stats_get_policy) - 1,
1043 },
1044 {
1045 .cmd = ETHTOOL_MSG_PHC_VCLOCKS_GET,
1046 .doit = ethnl_default_doit,
1047 .start = ethnl_default_start,
1048 .dumpit = ethnl_default_dumpit,
1049 .done = ethnl_default_done,
1050 .policy = ethnl_phc_vclocks_get_policy,
1051 .maxattr = ARRAY_SIZE(ethnl_phc_vclocks_get_policy) - 1,
1052 },
1053 {
1054 .cmd = ETHTOOL_MSG_MODULE_GET,
1055 .doit = ethnl_default_doit,
1056 .start = ethnl_default_start,
1057 .dumpit = ethnl_default_dumpit,
1058 .done = ethnl_default_done,
1059 .policy = ethnl_module_get_policy,
1060 .maxattr = ARRAY_SIZE(ethnl_module_get_policy) - 1,
1061 },
1062 {
1063 .cmd = ETHTOOL_MSG_MODULE_SET,
1064 .flags = GENL_UNS_ADMIN_PERM,
1065 .doit = ethnl_default_set_doit,
1066 .policy = ethnl_module_set_policy,
1067 .maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1,
1068 },
1069 {
1070 .cmd = ETHTOOL_MSG_PSE_GET,
1071 .doit = ethnl_default_doit,
1072 .start = ethnl_default_start,
1073 .dumpit = ethnl_default_dumpit,
1074 .done = ethnl_default_done,
1075 .policy = ethnl_pse_get_policy,
1076 .maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1,
1077 },
1078 {
1079 .cmd = ETHTOOL_MSG_PSE_SET,
1080 .flags = GENL_UNS_ADMIN_PERM,
1081 .doit = ethnl_default_set_doit,
1082 .policy = ethnl_pse_set_policy,
1083 .maxattr = ARRAY_SIZE(ethnl_pse_set_policy) - 1,
1084 },
1085 {
1086 .cmd = ETHTOOL_MSG_RSS_GET,
1087 .doit = ethnl_default_doit,
1088 .policy = ethnl_rss_get_policy,
1089 .maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1,
1090 },
1091 {
1092 .cmd = ETHTOOL_MSG_PLCA_GET_CFG,
1093 .doit = ethnl_default_doit,
1094 .start = ethnl_default_start,
1095 .dumpit = ethnl_default_dumpit,
1096 .done = ethnl_default_done,
1097 .policy = ethnl_plca_get_cfg_policy,
1098 .maxattr = ARRAY_SIZE(ethnl_plca_get_cfg_policy) - 1,
1099 },
1100 {
1101 .cmd = ETHTOOL_MSG_PLCA_SET_CFG,
1102 .flags = GENL_UNS_ADMIN_PERM,
1103 .doit = ethnl_default_set_doit,
1104 .policy = ethnl_plca_set_cfg_policy,
1105 .maxattr = ARRAY_SIZE(ethnl_plca_set_cfg_policy) - 1,
1106 },
1107 {
1108 .cmd = ETHTOOL_MSG_PLCA_GET_STATUS,
1109 .doit = ethnl_default_doit,
1110 .start = ethnl_default_start,
1111 .dumpit = ethnl_default_dumpit,
1112 .done = ethnl_default_done,
1113 .policy = ethnl_plca_get_status_policy,
1114 .maxattr = ARRAY_SIZE(ethnl_plca_get_status_policy) - 1,
1115 },
1116 {
1117 .cmd = ETHTOOL_MSG_MM_GET,
1118 .doit = ethnl_default_doit,
1119 .start = ethnl_default_start,
1120 .dumpit = ethnl_default_dumpit,
1121 .done = ethnl_default_done,
1122 .policy = ethnl_mm_get_policy,
1123 .maxattr = ARRAY_SIZE(ethnl_mm_get_policy) - 1,
1124 },
1125 {
1126 .cmd = ETHTOOL_MSG_MM_SET,
1127 .flags = GENL_UNS_ADMIN_PERM,
1128 .doit = ethnl_default_set_doit,
1129 .policy = ethnl_mm_set_policy,
1130 .maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1,
1131 },
1132};
1133
1134static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
1135 [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME },
1136};
1137
1138static struct genl_family ethtool_genl_family __ro_after_init = {
1139 .name = ETHTOOL_GENL_NAME,
1140 .version = ETHTOOL_GENL_VERSION,
1141 .netnsok = true,
1142 .parallel_ops = true,
1143 .ops = ethtool_genl_ops,
1144 .n_ops = ARRAY_SIZE(ethtool_genl_ops),
1145 .resv_start_op = ETHTOOL_MSG_MODULE_GET + 1,
1146 .mcgrps = ethtool_nl_mcgrps,
1147 .n_mcgrps = ARRAY_SIZE(ethtool_nl_mcgrps),
1148};
1149
1150/* module setup */
1151
1152static int __init ethnl_init(void)
1153{
1154 int ret;
1155
1156 ret = genl_register_family(ðtool_genl_family);
1157 if (WARN(ret < 0, "ethtool: genetlink family registration failed"))
1158 return ret;
1159 ethnl_ok = true;
1160
1161 ret = register_netdevice_notifier(ðnl_netdev_notifier);
1162 WARN(ret < 0, "ethtool: net device notifier registration failed");
1163 return ret;
1164}
1165
1166subsys_initcall(ethnl_init);