xref: /openbmc/linux/net/ethtool/netlink.c (revision 61ae993c)
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 
ethnl_ops_begin(struct net_device * dev)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 
ethnl_ops_complete(struct net_device * dev)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  */
ethnl_parse_header_dev_get(struct ethnl_req_info * req_info,const struct nlattr * header,struct net * net,struct netlink_ext_ack * extack,bool require_dev)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  */
ethnl_fill_reply_header(struct sk_buff * skb,struct net_device * dev,u16 attrtype)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  */
ethnl_reply_init(size_t payload,struct net_device * dev,u8 cmd,u16 hdr_attrtype,struct genl_info * info,void ** ehdrp)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 
ethnl_dump_put(struct sk_buff * skb,struct netlink_callback * cb,u8 cmd)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 
ethnl_bcastmsg_put(struct sk_buff * skb,u8 cmd)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 
ethnl_multicast(struct sk_buff * skb,struct net_device * dev)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 
ethnl_dump_context(struct netlink_callback * cb)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  */
ethnl_default_parse(struct ethnl_req_info * req_info,const struct genl_info * info,const struct ethnl_request_ops * request_ops,bool require_dev)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  */
ethnl_init_reply_data(struct ethnl_reply_data * reply_data,const struct ethnl_request_ops * ops,struct net_device * dev)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 */
ethnl_default_doit(struct sk_buff * skb,struct genl_info * info)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 
ethnl_default_dump_one(struct sk_buff * skb,struct net_device * dev,const struct ethnl_dump_ctx * ctx,const struct genl_info * info)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  */
ethnl_default_dumpit(struct sk_buff * skb,struct netlink_callback * cb)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 		ret = 0;
509 	}
510 	rtnl_unlock();
511 
512 	return ret;
513 }
514 
515 /* generic ->start() handler for GET requests */
ethnl_default_start(struct netlink_callback * cb)516 static 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 
560 free_reply_data:
561 	kfree(reply_data);
562 free_req_info:
563 	kfree(req_info);
564 
565 	return ret;
566 }
567 
568 /* default ->done() handler for GET requests */
ethnl_default_done(struct netlink_callback * cb)569 static 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 
ethnl_default_set_doit(struct sk_buff * skb,struct genl_info * info)579 static 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;
616 out_ops:
617 	ethnl_ops_complete(req_info.dev);
618 out_rtnl:
619 	rtnl_unlock();
620 out_dev:
621 	ethnl_parse_header_dev_put(&req_info);
622 	return ret;
623 }
624 
625 static const struct ethnl_request_ops *
626 ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
627 	[ETHTOOL_MSG_LINKINFO_NTF]	= &ethnl_linkinfo_request_ops,
628 	[ETHTOOL_MSG_LINKMODES_NTF]	= &ethnl_linkmodes_request_ops,
629 	[ETHTOOL_MSG_DEBUG_NTF]		= &ethnl_debug_request_ops,
630 	[ETHTOOL_MSG_WOL_NTF]		= &ethnl_wol_request_ops,
631 	[ETHTOOL_MSG_FEATURES_NTF]	= &ethnl_features_request_ops,
632 	[ETHTOOL_MSG_PRIVFLAGS_NTF]	= &ethnl_privflags_request_ops,
633 	[ETHTOOL_MSG_RINGS_NTF]		= &ethnl_rings_request_ops,
634 	[ETHTOOL_MSG_CHANNELS_NTF]	= &ethnl_channels_request_ops,
635 	[ETHTOOL_MSG_COALESCE_NTF]	= &ethnl_coalesce_request_ops,
636 	[ETHTOOL_MSG_PAUSE_NTF]		= &ethnl_pause_request_ops,
637 	[ETHTOOL_MSG_EEE_NTF]		= &ethnl_eee_request_ops,
638 	[ETHTOOL_MSG_FEC_NTF]		= &ethnl_fec_request_ops,
639 	[ETHTOOL_MSG_MODULE_NTF]	= &ethnl_module_request_ops,
640 	[ETHTOOL_MSG_PLCA_NTF]		= &ethnl_plca_cfg_request_ops,
641 	[ETHTOOL_MSG_MM_NTF]		= &ethnl_mm_request_ops,
642 };
643 
644 /* default notification handler */
ethnl_default_notify(struct net_device * dev,unsigned int cmd,const void * data)645 static 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, &ethtool_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 
705 err_msg:
706 	WARN_ONCE(ret == -EMSGSIZE,
707 		  "calculated message payload length (%d) not sufficient\n",
708 		  reply_len);
709 err_skb:
710 	nlmsg_free(skb);
711 err_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 
721 typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd,
722 				       const void *data);
723 
724 static 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 
ethtool_notify(struct net_device * dev,unsigned int cmd,const void * data)742 void 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 }
755 EXPORT_SYMBOL(ethtool_notify);
756 
ethnl_notify_features(struct netdev_notifier_info * info)757 static 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 
ethnl_netdev_event(struct notifier_block * this,unsigned long event,void * ptr)764 static 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 
776 static struct notifier_block ethnl_netdev_notifier = {
777 	.notifier_call = ethnl_netdev_event,
778 };
779 
780 /* genetlink setup */
781 
782 static 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 
1134 static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
1135 	[ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME },
1136 };
1137 
1138 static 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 
ethnl_init(void)1152 static int __init ethnl_init(void)
1153 {
1154 	int ret;
1155 
1156 	ret = genl_register_family(&ethtool_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(&ethnl_netdev_notifier);
1162 	WARN(ret < 0, "ethtool: net device notifier registration failed");
1163 	return ret;
1164 }
1165 
1166 subsys_initcall(ethnl_init);
1167