xref: /linux/net/ethtool/netlink.c (revision d3c9510dc900e9ff3ea330189c0465c9f00fba18)
1 // SPDX-License-Identifier: GPL-2.0-only
2 
3 #include <net/sock.h>
4 #include <linux/ethtool_netlink.h>
5 #include <linux/phy_link_topology.h>
6 #include <linux/pm_runtime.h>
7 #include "netlink.h"
8 #include "module_fw.h"
9 
10 static struct genl_family ethtool_genl_family;
11 
12 static bool ethnl_ok __read_mostly;
13 static u32 ethnl_bcast_seq;
14 
15 #define ETHTOOL_FLAGS_BASIC (ETHTOOL_FLAG_COMPACT_BITSETS |	\
16 			     ETHTOOL_FLAG_OMIT_REPLY)
17 #define ETHTOOL_FLAGS_STATS (ETHTOOL_FLAGS_BASIC | ETHTOOL_FLAG_STATS)
18 
19 const struct nla_policy ethnl_header_policy[] = {
20 	[ETHTOOL_A_HEADER_DEV_INDEX]	= { .type = NLA_U32 },
21 	[ETHTOOL_A_HEADER_DEV_NAME]	= { .type = NLA_NUL_STRING,
22 					    .len = ALTIFNAMSIZ - 1 },
23 	[ETHTOOL_A_HEADER_FLAGS]	= NLA_POLICY_MASK(NLA_U32,
24 							  ETHTOOL_FLAGS_BASIC),
25 };
26 
27 const struct nla_policy ethnl_header_policy_stats[] = {
28 	[ETHTOOL_A_HEADER_DEV_INDEX]	= { .type = NLA_U32 },
29 	[ETHTOOL_A_HEADER_DEV_NAME]	= { .type = NLA_NUL_STRING,
30 					    .len = ALTIFNAMSIZ - 1 },
31 	[ETHTOOL_A_HEADER_FLAGS]	= NLA_POLICY_MASK(NLA_U32,
32 							  ETHTOOL_FLAGS_STATS),
33 };
34 
35 const struct nla_policy ethnl_header_policy_phy[] = {
36 	[ETHTOOL_A_HEADER_DEV_INDEX]	= { .type = NLA_U32 },
37 	[ETHTOOL_A_HEADER_DEV_NAME]	= { .type = NLA_NUL_STRING,
38 					    .len = ALTIFNAMSIZ - 1 },
39 	[ETHTOOL_A_HEADER_FLAGS]	= NLA_POLICY_MASK(NLA_U32,
40 							  ETHTOOL_FLAGS_BASIC),
41 	[ETHTOOL_A_HEADER_PHY_INDEX]		= NLA_POLICY_MIN(NLA_U32, 1),
42 };
43 
44 const struct nla_policy ethnl_header_policy_phy_stats[] = {
45 	[ETHTOOL_A_HEADER_DEV_INDEX]	= { .type = NLA_U32 },
46 	[ETHTOOL_A_HEADER_DEV_NAME]	= { .type = NLA_NUL_STRING,
47 					    .len = ALTIFNAMSIZ - 1 },
48 	[ETHTOOL_A_HEADER_FLAGS]	= NLA_POLICY_MASK(NLA_U32,
49 							  ETHTOOL_FLAGS_STATS),
50 	[ETHTOOL_A_HEADER_PHY_INDEX]		= NLA_POLICY_MIN(NLA_U32, 1),
51 };
52 
53 int ethnl_sock_priv_set(struct sk_buff *skb, struct net_device *dev, u32 portid,
54 			enum ethnl_sock_type type)
55 {
56 	struct ethnl_sock_priv *sk_priv;
57 
58 	sk_priv = genl_sk_priv_get(&ethtool_genl_family, NETLINK_CB(skb).sk);
59 	if (IS_ERR(sk_priv))
60 		return PTR_ERR(sk_priv);
61 
62 	sk_priv->dev = dev;
63 	sk_priv->portid = portid;
64 	sk_priv->type = type;
65 
66 	return 0;
67 }
68 
69 static void ethnl_sock_priv_destroy(void *priv)
70 {
71 	struct ethnl_sock_priv *sk_priv = priv;
72 
73 	switch (sk_priv->type) {
74 	case ETHTOOL_SOCK_TYPE_MODULE_FW_FLASH:
75 		ethnl_module_fw_flash_sock_destroy(sk_priv);
76 		break;
77 	default:
78 		break;
79 	}
80 }
81 
82 int ethnl_ops_begin(struct net_device *dev)
83 {
84 	int ret;
85 
86 	if (!dev)
87 		return -ENODEV;
88 
89 	if (dev->dev.parent)
90 		pm_runtime_get_sync(dev->dev.parent);
91 
92 	if (!netif_device_present(dev) ||
93 	    dev->reg_state == NETREG_UNREGISTERING) {
94 		ret = -ENODEV;
95 		goto err;
96 	}
97 
98 	if (dev->ethtool_ops->begin) {
99 		ret = dev->ethtool_ops->begin(dev);
100 		if (ret)
101 			goto err;
102 	}
103 
104 	return 0;
105 err:
106 	if (dev->dev.parent)
107 		pm_runtime_put(dev->dev.parent);
108 
109 	return ret;
110 }
111 
112 void ethnl_ops_complete(struct net_device *dev)
113 {
114 	if (dev->ethtool_ops->complete)
115 		dev->ethtool_ops->complete(dev);
116 
117 	if (dev->dev.parent)
118 		pm_runtime_put(dev->dev.parent);
119 }
120 
121 /**
122  * ethnl_parse_header_dev_get() - parse request header
123  * @req_info:    structure to put results into
124  * @header:      nest attribute with request header
125  * @net:         request netns
126  * @extack:      netlink extack for error reporting
127  * @require_dev: fail if no device identified in header
128  *
129  * Parse request header in nested attribute @nest and puts results into
130  * the structure pointed to by @req_info. Extack from @info is used for error
131  * reporting. If req_info->dev is not null on return, reference to it has
132  * been taken. If error is returned, *req_info is null initialized and no
133  * reference is held.
134  *
135  * Return: 0 on success or negative error code
136  */
137 int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
138 			       const struct nlattr *header, struct net *net,
139 			       struct netlink_ext_ack *extack, bool require_dev)
140 {
141 	struct nlattr *tb[ARRAY_SIZE(ethnl_header_policy_phy)];
142 	const struct nlattr *devname_attr;
143 	struct net_device *dev = NULL;
144 	u32 flags = 0;
145 	int ret;
146 
147 	if (!header) {
148 		if (!require_dev)
149 			return 0;
150 		NL_SET_ERR_MSG(extack, "request header missing");
151 		return -EINVAL;
152 	}
153 	/* No validation here, command policy should have a nested policy set
154 	 * for the header, therefore validation should have already been done.
155 	 */
156 	ret = nla_parse_nested(tb, ARRAY_SIZE(ethnl_header_policy_phy) - 1, header,
157 			       NULL, extack);
158 	if (ret < 0)
159 		return ret;
160 	if (tb[ETHTOOL_A_HEADER_FLAGS])
161 		flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]);
162 
163 	devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME];
164 	if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) {
165 		u32 ifindex = nla_get_u32(tb[ETHTOOL_A_HEADER_DEV_INDEX]);
166 
167 		dev = netdev_get_by_index(net, ifindex, &req_info->dev_tracker,
168 					  GFP_KERNEL);
169 		if (!dev) {
170 			NL_SET_ERR_MSG_ATTR(extack,
171 					    tb[ETHTOOL_A_HEADER_DEV_INDEX],
172 					    "no device matches ifindex");
173 			return -ENODEV;
174 		}
175 		/* if both ifindex and ifname are passed, they must match */
176 		if (devname_attr &&
177 		    strncmp(dev->name, nla_data(devname_attr), IFNAMSIZ)) {
178 			netdev_put(dev, &req_info->dev_tracker);
179 			NL_SET_ERR_MSG_ATTR(extack, header,
180 					    "ifindex and name do not match");
181 			return -ENODEV;
182 		}
183 	} else if (devname_attr) {
184 		dev = netdev_get_by_name(net, nla_data(devname_attr),
185 					 &req_info->dev_tracker, GFP_KERNEL);
186 		if (!dev) {
187 			NL_SET_ERR_MSG_ATTR(extack, devname_attr,
188 					    "no device matches name");
189 			return -ENODEV;
190 		}
191 	} else if (require_dev) {
192 		NL_SET_ERR_MSG_ATTR(extack, header,
193 				    "neither ifindex nor name specified");
194 		return -EINVAL;
195 	}
196 
197 	if (tb[ETHTOOL_A_HEADER_PHY_INDEX]) {
198 		if (dev) {
199 			req_info->phy_index = nla_get_u32(tb[ETHTOOL_A_HEADER_PHY_INDEX]);
200 		} else {
201 			NL_SET_ERR_MSG_ATTR(extack, header,
202 					    "phy_index set without a netdev");
203 			return -EINVAL;
204 		}
205 	}
206 
207 	req_info->dev = dev;
208 	req_info->flags = flags;
209 	return 0;
210 }
211 
212 struct phy_device *ethnl_req_get_phydev(const struct ethnl_req_info *req_info,
213 					const struct nlattr *header,
214 					struct netlink_ext_ack *extack)
215 {
216 	struct phy_device *phydev;
217 
218 	ASSERT_RTNL();
219 
220 	if (!req_info->dev)
221 		return NULL;
222 
223 	if (!req_info->phy_index)
224 		return req_info->dev->phydev;
225 
226 	phydev = phy_link_topo_get_phy(req_info->dev, req_info->phy_index);
227 	if (!phydev) {
228 		NL_SET_ERR_MSG_ATTR(extack, header,
229 				    "no phy matching phyindex");
230 		return ERR_PTR(-ENODEV);
231 	}
232 
233 	return phydev;
234 }
235 
236 /**
237  * ethnl_fill_reply_header() - Put common header into a reply message
238  * @skb:      skb with the message
239  * @dev:      network device to describe in header
240  * @attrtype: attribute type to use for the nest
241  *
242  * Create a nested attribute with attributes describing given network device.
243  *
244  * Return: 0 on success, error value (-EMSGSIZE only) on error
245  */
246 int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev,
247 			    u16 attrtype)
248 {
249 	struct nlattr *nest;
250 
251 	if (!dev)
252 		return 0;
253 	nest = nla_nest_start(skb, attrtype);
254 	if (!nest)
255 		return -EMSGSIZE;
256 
257 	if (nla_put_u32(skb, ETHTOOL_A_HEADER_DEV_INDEX, (u32)dev->ifindex) ||
258 	    nla_put_string(skb, ETHTOOL_A_HEADER_DEV_NAME, dev->name))
259 		goto nla_put_failure;
260 	/* If more attributes are put into reply header, ethnl_header_size()
261 	 * must be updated to account for them.
262 	 */
263 
264 	nla_nest_end(skb, nest);
265 	return 0;
266 
267 nla_put_failure:
268 	nla_nest_cancel(skb, nest);
269 	return -EMSGSIZE;
270 }
271 
272 /**
273  * ethnl_reply_init() - Create skb for a reply and fill device identification
274  * @payload:      payload length (without netlink and genetlink header)
275  * @dev:          device the reply is about (may be null)
276  * @cmd:          ETHTOOL_MSG_* message type for reply
277  * @hdr_attrtype: attribute type for common header
278  * @info:         genetlink info of the received packet we respond to
279  * @ehdrp:        place to store payload pointer returned by genlmsg_new()
280  *
281  * Return: pointer to allocated skb on success, NULL on error
282  */
283 struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
284 				 u16 hdr_attrtype, struct genl_info *info,
285 				 void **ehdrp)
286 {
287 	struct sk_buff *skb;
288 
289 	skb = genlmsg_new(payload, GFP_KERNEL);
290 	if (!skb)
291 		goto err;
292 	*ehdrp = genlmsg_put_reply(skb, info, &ethtool_genl_family, 0, cmd);
293 	if (!*ehdrp)
294 		goto err_free;
295 
296 	if (dev) {
297 		int ret;
298 
299 		ret = ethnl_fill_reply_header(skb, dev, hdr_attrtype);
300 		if (ret < 0)
301 			goto err_free;
302 	}
303 	return skb;
304 
305 err_free:
306 	nlmsg_free(skb);
307 err:
308 	if (info)
309 		GENL_SET_ERR_MSG(info, "failed to setup reply message");
310 	return NULL;
311 }
312 
313 void *ethnl_dump_put(struct sk_buff *skb, struct netlink_callback *cb, u8 cmd)
314 {
315 	return genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
316 			   &ethtool_genl_family, 0, cmd);
317 }
318 
319 void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd)
320 {
321 	return genlmsg_put(skb, 0, ++ethnl_bcast_seq, &ethtool_genl_family, 0,
322 			   cmd);
323 }
324 
325 void *ethnl_unicast_put(struct sk_buff *skb, u32 portid, u32 seq, u8 cmd)
326 {
327 	return genlmsg_put(skb, portid, seq, &ethtool_genl_family, 0, cmd);
328 }
329 
330 int ethnl_multicast(struct sk_buff *skb, struct net_device *dev)
331 {
332 	return genlmsg_multicast_netns(&ethtool_genl_family, dev_net(dev), skb,
333 				       0, ETHNL_MCGRP_MONITOR, GFP_KERNEL);
334 }
335 
336 /* GET request helpers */
337 
338 /**
339  * struct ethnl_dump_ctx - context structure for generic dumpit() callback
340  * @ops:        request ops of currently processed message type
341  * @req_info:   parsed request header of processed request
342  * @reply_data: data needed to compose the reply
343  * @pos_ifindex: saved iteration position - ifindex
344  *
345  * These parameters are kept in struct netlink_callback as context preserved
346  * between iterations. They are initialized by ethnl_default_start() and used
347  * in ethnl_default_dumpit() and ethnl_default_done().
348  */
349 struct ethnl_dump_ctx {
350 	const struct ethnl_request_ops	*ops;
351 	struct ethnl_req_info		*req_info;
352 	struct ethnl_reply_data		*reply_data;
353 	unsigned long			pos_ifindex;
354 };
355 
356 static const struct ethnl_request_ops *
357 ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
358 	[ETHTOOL_MSG_STRSET_GET]	= &ethnl_strset_request_ops,
359 	[ETHTOOL_MSG_LINKINFO_GET]	= &ethnl_linkinfo_request_ops,
360 	[ETHTOOL_MSG_LINKINFO_SET]	= &ethnl_linkinfo_request_ops,
361 	[ETHTOOL_MSG_LINKMODES_GET]	= &ethnl_linkmodes_request_ops,
362 	[ETHTOOL_MSG_LINKMODES_SET]	= &ethnl_linkmodes_request_ops,
363 	[ETHTOOL_MSG_LINKSTATE_GET]	= &ethnl_linkstate_request_ops,
364 	[ETHTOOL_MSG_DEBUG_GET]		= &ethnl_debug_request_ops,
365 	[ETHTOOL_MSG_DEBUG_SET]		= &ethnl_debug_request_ops,
366 	[ETHTOOL_MSG_WOL_GET]		= &ethnl_wol_request_ops,
367 	[ETHTOOL_MSG_WOL_SET]		= &ethnl_wol_request_ops,
368 	[ETHTOOL_MSG_FEATURES_GET]	= &ethnl_features_request_ops,
369 	[ETHTOOL_MSG_PRIVFLAGS_GET]	= &ethnl_privflags_request_ops,
370 	[ETHTOOL_MSG_PRIVFLAGS_SET]	= &ethnl_privflags_request_ops,
371 	[ETHTOOL_MSG_RINGS_GET]		= &ethnl_rings_request_ops,
372 	[ETHTOOL_MSG_RINGS_SET]		= &ethnl_rings_request_ops,
373 	[ETHTOOL_MSG_CHANNELS_GET]	= &ethnl_channels_request_ops,
374 	[ETHTOOL_MSG_CHANNELS_SET]	= &ethnl_channels_request_ops,
375 	[ETHTOOL_MSG_COALESCE_GET]	= &ethnl_coalesce_request_ops,
376 	[ETHTOOL_MSG_COALESCE_SET]	= &ethnl_coalesce_request_ops,
377 	[ETHTOOL_MSG_PAUSE_GET]		= &ethnl_pause_request_ops,
378 	[ETHTOOL_MSG_PAUSE_SET]		= &ethnl_pause_request_ops,
379 	[ETHTOOL_MSG_EEE_GET]		= &ethnl_eee_request_ops,
380 	[ETHTOOL_MSG_EEE_SET]		= &ethnl_eee_request_ops,
381 	[ETHTOOL_MSG_FEC_GET]		= &ethnl_fec_request_ops,
382 	[ETHTOOL_MSG_FEC_SET]		= &ethnl_fec_request_ops,
383 	[ETHTOOL_MSG_TSINFO_GET]	= &ethnl_tsinfo_request_ops,
384 	[ETHTOOL_MSG_MODULE_EEPROM_GET]	= &ethnl_module_eeprom_request_ops,
385 	[ETHTOOL_MSG_STATS_GET]		= &ethnl_stats_request_ops,
386 	[ETHTOOL_MSG_PHC_VCLOCKS_GET]	= &ethnl_phc_vclocks_request_ops,
387 	[ETHTOOL_MSG_MODULE_GET]	= &ethnl_module_request_ops,
388 	[ETHTOOL_MSG_MODULE_SET]	= &ethnl_module_request_ops,
389 	[ETHTOOL_MSG_PSE_GET]		= &ethnl_pse_request_ops,
390 	[ETHTOOL_MSG_PSE_SET]		= &ethnl_pse_request_ops,
391 	[ETHTOOL_MSG_RSS_GET]		= &ethnl_rss_request_ops,
392 	[ETHTOOL_MSG_PLCA_GET_CFG]	= &ethnl_plca_cfg_request_ops,
393 	[ETHTOOL_MSG_PLCA_SET_CFG]	= &ethnl_plca_cfg_request_ops,
394 	[ETHTOOL_MSG_PLCA_GET_STATUS]	= &ethnl_plca_status_request_ops,
395 	[ETHTOOL_MSG_MM_GET]		= &ethnl_mm_request_ops,
396 	[ETHTOOL_MSG_MM_SET]		= &ethnl_mm_request_ops,
397 	[ETHTOOL_MSG_TSCONFIG_GET]	= &ethnl_tsconfig_request_ops,
398 	[ETHTOOL_MSG_TSCONFIG_SET]	= &ethnl_tsconfig_request_ops,
399 };
400 
401 static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
402 {
403 	return (struct ethnl_dump_ctx *)cb->ctx;
404 }
405 
406 /**
407  * ethnl_default_parse() - Parse request message
408  * @req_info:    pointer to structure to put data into
409  * @info:	 genl_info from the request
410  * @request_ops: struct request_ops for request type
411  * @require_dev: fail if no device identified in header
412  *
413  * Parse universal request header and call request specific ->parse_request()
414  * callback (if defined) to parse the rest of the message.
415  *
416  * Return: 0 on success or negative error code
417  */
418 static int ethnl_default_parse(struct ethnl_req_info *req_info,
419 			       const struct genl_info *info,
420 			       const struct ethnl_request_ops *request_ops,
421 			       bool require_dev)
422 {
423 	struct nlattr **tb = info->attrs;
424 	int ret;
425 
426 	ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr],
427 					 genl_info_net(info), info->extack,
428 					 require_dev);
429 	if (ret < 0)
430 		return ret;
431 
432 	if (request_ops->parse_request) {
433 		ret = request_ops->parse_request(req_info, tb, info->extack);
434 		if (ret < 0)
435 			return ret;
436 	}
437 
438 	return 0;
439 }
440 
441 /**
442  * ethnl_init_reply_data() - Initialize reply data for GET request
443  * @reply_data: pointer to embedded struct ethnl_reply_data
444  * @ops:        instance of struct ethnl_request_ops describing the layout
445  * @dev:        network device to initialize the reply for
446  *
447  * Fills the reply data part with zeros and sets the dev member. Must be called
448  * before calling the ->fill_reply() callback (for each iteration when handling
449  * dump requests).
450  */
451 static void ethnl_init_reply_data(struct ethnl_reply_data *reply_data,
452 				  const struct ethnl_request_ops *ops,
453 				  struct net_device *dev)
454 {
455 	memset(reply_data, 0, ops->reply_data_size);
456 	reply_data->dev = dev;
457 }
458 
459 /* default ->doit() handler for GET type requests */
460 static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info)
461 {
462 	struct ethnl_reply_data *reply_data = NULL;
463 	struct ethnl_req_info *req_info = NULL;
464 	const u8 cmd = info->genlhdr->cmd;
465 	const struct ethnl_request_ops *ops;
466 	int hdr_len, reply_len;
467 	struct sk_buff *rskb;
468 	void *reply_payload;
469 	int ret;
470 
471 	ops = ethnl_default_requests[cmd];
472 	if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
473 		return -EOPNOTSUPP;
474 	if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr))
475 		return -EINVAL;
476 
477 	req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
478 	if (!req_info)
479 		return -ENOMEM;
480 	reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
481 	if (!reply_data) {
482 		kfree(req_info);
483 		return -ENOMEM;
484 	}
485 
486 	ret = ethnl_default_parse(req_info, info, ops, !ops->allow_nodev_do);
487 	if (ret < 0)
488 		goto err_dev;
489 	ethnl_init_reply_data(reply_data, ops, req_info->dev);
490 
491 	rtnl_lock();
492 	ret = ops->prepare_data(req_info, reply_data, info);
493 	rtnl_unlock();
494 	if (ret < 0)
495 		goto err_cleanup;
496 	ret = ops->reply_size(req_info, reply_data);
497 	if (ret < 0)
498 		goto err_cleanup;
499 	reply_len = ret;
500 	ret = -ENOMEM;
501 	rskb = ethnl_reply_init(reply_len + ethnl_reply_header_size(),
502 				req_info->dev, ops->reply_cmd,
503 				ops->hdr_attr, info, &reply_payload);
504 	if (!rskb)
505 		goto err_cleanup;
506 	hdr_len = rskb->len;
507 	ret = ops->fill_reply(rskb, req_info, reply_data);
508 	if (ret < 0)
509 		goto err_msg;
510 	WARN_ONCE(rskb->len - hdr_len > reply_len,
511 		  "ethnl cmd %d: calculated reply length %d, but consumed %d\n",
512 		  cmd, reply_len, rskb->len - hdr_len);
513 	if (ops->cleanup_data)
514 		ops->cleanup_data(reply_data);
515 
516 	genlmsg_end(rskb, reply_payload);
517 	netdev_put(req_info->dev, &req_info->dev_tracker);
518 	kfree(reply_data);
519 	kfree(req_info);
520 	return genlmsg_reply(rskb, info);
521 
522 err_msg:
523 	WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len);
524 	nlmsg_free(rskb);
525 err_cleanup:
526 	if (ops->cleanup_data)
527 		ops->cleanup_data(reply_data);
528 err_dev:
529 	netdev_put(req_info->dev, &req_info->dev_tracker);
530 	kfree(reply_data);
531 	kfree(req_info);
532 	return ret;
533 }
534 
535 static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev,
536 				  const struct ethnl_dump_ctx *ctx,
537 				  const struct genl_info *info)
538 {
539 	void *ehdr;
540 	int ret;
541 
542 	ehdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
543 			   &ethtool_genl_family, NLM_F_MULTI,
544 			   ctx->ops->reply_cmd);
545 	if (!ehdr)
546 		return -EMSGSIZE;
547 
548 	ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev);
549 	rtnl_lock();
550 	ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, info);
551 	rtnl_unlock();
552 	if (ret < 0)
553 		goto out;
554 	ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr);
555 	if (ret < 0)
556 		goto out;
557 	ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data);
558 
559 out:
560 	if (ctx->ops->cleanup_data)
561 		ctx->ops->cleanup_data(ctx->reply_data);
562 	ctx->reply_data->dev = NULL;
563 	if (ret < 0)
564 		genlmsg_cancel(skb, ehdr);
565 	else
566 		genlmsg_end(skb, ehdr);
567 	return ret;
568 }
569 
570 /* Default ->dumpit() handler for GET requests. */
571 static int ethnl_default_dumpit(struct sk_buff *skb,
572 				struct netlink_callback *cb)
573 {
574 	struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
575 	struct net *net = sock_net(skb->sk);
576 	struct net_device *dev;
577 	int ret = 0;
578 
579 	rcu_read_lock();
580 	for_each_netdev_dump(net, dev, ctx->pos_ifindex) {
581 		dev_hold(dev);
582 		rcu_read_unlock();
583 
584 		ret = ethnl_default_dump_one(skb, dev, ctx, genl_info_dump(cb));
585 
586 		rcu_read_lock();
587 		dev_put(dev);
588 
589 		if (ret < 0 && ret != -EOPNOTSUPP) {
590 			if (likely(skb->len))
591 				ret = skb->len;
592 			break;
593 		}
594 		ret = 0;
595 	}
596 	rcu_read_unlock();
597 
598 	return ret;
599 }
600 
601 /* generic ->start() handler for GET requests */
602 static int ethnl_default_start(struct netlink_callback *cb)
603 {
604 	const struct genl_dumpit_info *info = genl_dumpit_info(cb);
605 	struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
606 	struct ethnl_reply_data *reply_data;
607 	const struct ethnl_request_ops *ops;
608 	struct ethnl_req_info *req_info;
609 	struct genlmsghdr *ghdr;
610 	int ret;
611 
612 	BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
613 
614 	ghdr = nlmsg_data(cb->nlh);
615 	ops = ethnl_default_requests[ghdr->cmd];
616 	if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd))
617 		return -EOPNOTSUPP;
618 	req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
619 	if (!req_info)
620 		return -ENOMEM;
621 	reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
622 	if (!reply_data) {
623 		ret = -ENOMEM;
624 		goto free_req_info;
625 	}
626 
627 	ret = ethnl_default_parse(req_info, &info->info, ops, false);
628 	if (req_info->dev) {
629 		/* We ignore device specification in dump requests but as the
630 		 * same parser as for non-dump (doit) requests is used, it
631 		 * would take reference to the device if it finds one
632 		 */
633 		netdev_put(req_info->dev, &req_info->dev_tracker);
634 		req_info->dev = NULL;
635 	}
636 	if (ret < 0)
637 		goto free_reply_data;
638 
639 	ctx->ops = ops;
640 	ctx->req_info = req_info;
641 	ctx->reply_data = reply_data;
642 	ctx->pos_ifindex = 0;
643 
644 	return 0;
645 
646 free_reply_data:
647 	kfree(reply_data);
648 free_req_info:
649 	kfree(req_info);
650 
651 	return ret;
652 }
653 
654 /* default ->done() handler for GET requests */
655 static int ethnl_default_done(struct netlink_callback *cb)
656 {
657 	struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
658 
659 	kfree(ctx->reply_data);
660 	kfree(ctx->req_info);
661 
662 	return 0;
663 }
664 
665 static int ethnl_default_set_doit(struct sk_buff *skb, struct genl_info *info)
666 {
667 	const struct ethnl_request_ops *ops;
668 	struct ethnl_req_info req_info = {};
669 	const u8 cmd = info->genlhdr->cmd;
670 	int ret;
671 
672 	ops = ethnl_default_requests[cmd];
673 	if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
674 		return -EOPNOTSUPP;
675 	if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr))
676 		return -EINVAL;
677 
678 	ret = ethnl_parse_header_dev_get(&req_info, info->attrs[ops->hdr_attr],
679 					 genl_info_net(info), info->extack,
680 					 true);
681 	if (ret < 0)
682 		return ret;
683 
684 	if (ops->set_validate) {
685 		ret = ops->set_validate(&req_info, info);
686 		/* 0 means nothing to do */
687 		if (ret <= 0)
688 			goto out_dev;
689 	}
690 
691 	rtnl_lock();
692 	ret = ethnl_ops_begin(req_info.dev);
693 	if (ret < 0)
694 		goto out_rtnl;
695 
696 	ret = ops->set(&req_info, info);
697 	if (ret <= 0)
698 		goto out_ops;
699 	ethtool_notify(req_info.dev, ops->set_ntf_cmd, NULL);
700 
701 	ret = 0;
702 out_ops:
703 	ethnl_ops_complete(req_info.dev);
704 out_rtnl:
705 	rtnl_unlock();
706 out_dev:
707 	ethnl_parse_header_dev_put(&req_info);
708 	return ret;
709 }
710 
711 static const struct ethnl_request_ops *
712 ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
713 	[ETHTOOL_MSG_LINKINFO_NTF]	= &ethnl_linkinfo_request_ops,
714 	[ETHTOOL_MSG_LINKMODES_NTF]	= &ethnl_linkmodes_request_ops,
715 	[ETHTOOL_MSG_DEBUG_NTF]		= &ethnl_debug_request_ops,
716 	[ETHTOOL_MSG_WOL_NTF]		= &ethnl_wol_request_ops,
717 	[ETHTOOL_MSG_FEATURES_NTF]	= &ethnl_features_request_ops,
718 	[ETHTOOL_MSG_PRIVFLAGS_NTF]	= &ethnl_privflags_request_ops,
719 	[ETHTOOL_MSG_RINGS_NTF]		= &ethnl_rings_request_ops,
720 	[ETHTOOL_MSG_CHANNELS_NTF]	= &ethnl_channels_request_ops,
721 	[ETHTOOL_MSG_COALESCE_NTF]	= &ethnl_coalesce_request_ops,
722 	[ETHTOOL_MSG_PAUSE_NTF]		= &ethnl_pause_request_ops,
723 	[ETHTOOL_MSG_EEE_NTF]		= &ethnl_eee_request_ops,
724 	[ETHTOOL_MSG_FEC_NTF]		= &ethnl_fec_request_ops,
725 	[ETHTOOL_MSG_MODULE_NTF]	= &ethnl_module_request_ops,
726 	[ETHTOOL_MSG_PLCA_NTF]		= &ethnl_plca_cfg_request_ops,
727 	[ETHTOOL_MSG_MM_NTF]		= &ethnl_mm_request_ops,
728 };
729 
730 /* default notification handler */
731 static void ethnl_default_notify(struct net_device *dev, unsigned int cmd,
732 				 const void *data)
733 {
734 	struct ethnl_reply_data *reply_data;
735 	const struct ethnl_request_ops *ops;
736 	struct ethnl_req_info *req_info;
737 	struct genl_info info;
738 	struct sk_buff *skb;
739 	void *reply_payload;
740 	int reply_len;
741 	int ret;
742 
743 	genl_info_init_ntf(&info, &ethtool_genl_family, cmd);
744 
745 	if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX ||
746 		      !ethnl_default_notify_ops[cmd],
747 		      "unexpected notification type %u\n", cmd))
748 		return;
749 	ops = ethnl_default_notify_ops[cmd];
750 	req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
751 	if (!req_info)
752 		return;
753 	reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
754 	if (!reply_data) {
755 		kfree(req_info);
756 		return;
757 	}
758 
759 	req_info->dev = dev;
760 	req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS;
761 
762 	ethnl_init_reply_data(reply_data, ops, dev);
763 	ret = ops->prepare_data(req_info, reply_data, &info);
764 	if (ret < 0)
765 		goto err_cleanup;
766 	ret = ops->reply_size(req_info, reply_data);
767 	if (ret < 0)
768 		goto err_cleanup;
769 	reply_len = ret + ethnl_reply_header_size();
770 	skb = genlmsg_new(reply_len, GFP_KERNEL);
771 	if (!skb)
772 		goto err_cleanup;
773 	reply_payload = ethnl_bcastmsg_put(skb, cmd);
774 	if (!reply_payload)
775 		goto err_skb;
776 	ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr);
777 	if (ret < 0)
778 		goto err_msg;
779 	ret = ops->fill_reply(skb, req_info, reply_data);
780 	if (ret < 0)
781 		goto err_msg;
782 	if (ops->cleanup_data)
783 		ops->cleanup_data(reply_data);
784 
785 	genlmsg_end(skb, reply_payload);
786 	kfree(reply_data);
787 	kfree(req_info);
788 	ethnl_multicast(skb, dev);
789 	return;
790 
791 err_msg:
792 	WARN_ONCE(ret == -EMSGSIZE,
793 		  "calculated message payload length (%d) not sufficient\n",
794 		  reply_len);
795 err_skb:
796 	nlmsg_free(skb);
797 err_cleanup:
798 	if (ops->cleanup_data)
799 		ops->cleanup_data(reply_data);
800 	kfree(reply_data);
801 	kfree(req_info);
802 	return;
803 }
804 
805 /* notifications */
806 
807 typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd,
808 				       const void *data);
809 
810 static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
811 	[ETHTOOL_MSG_LINKINFO_NTF]	= ethnl_default_notify,
812 	[ETHTOOL_MSG_LINKMODES_NTF]	= ethnl_default_notify,
813 	[ETHTOOL_MSG_DEBUG_NTF]		= ethnl_default_notify,
814 	[ETHTOOL_MSG_WOL_NTF]		= ethnl_default_notify,
815 	[ETHTOOL_MSG_FEATURES_NTF]	= ethnl_default_notify,
816 	[ETHTOOL_MSG_PRIVFLAGS_NTF]	= ethnl_default_notify,
817 	[ETHTOOL_MSG_RINGS_NTF]		= ethnl_default_notify,
818 	[ETHTOOL_MSG_CHANNELS_NTF]	= ethnl_default_notify,
819 	[ETHTOOL_MSG_COALESCE_NTF]	= ethnl_default_notify,
820 	[ETHTOOL_MSG_PAUSE_NTF]		= ethnl_default_notify,
821 	[ETHTOOL_MSG_EEE_NTF]		= ethnl_default_notify,
822 	[ETHTOOL_MSG_FEC_NTF]		= ethnl_default_notify,
823 	[ETHTOOL_MSG_MODULE_NTF]	= ethnl_default_notify,
824 	[ETHTOOL_MSG_PLCA_NTF]		= ethnl_default_notify,
825 	[ETHTOOL_MSG_MM_NTF]		= ethnl_default_notify,
826 };
827 
828 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
829 {
830 	if (unlikely(!ethnl_ok))
831 		return;
832 	ASSERT_RTNL();
833 
834 	if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) &&
835 		   ethnl_notify_handlers[cmd]))
836 		ethnl_notify_handlers[cmd](dev, cmd, data);
837 	else
838 		WARN_ONCE(1, "notification %u not implemented (dev=%s)\n",
839 			  cmd, netdev_name(dev));
840 }
841 EXPORT_SYMBOL(ethtool_notify);
842 
843 static void ethnl_notify_features(struct netdev_notifier_info *info)
844 {
845 	struct net_device *dev = netdev_notifier_info_to_dev(info);
846 
847 	ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL);
848 }
849 
850 static int ethnl_netdev_event(struct notifier_block *this, unsigned long event,
851 			      void *ptr)
852 {
853 	struct netdev_notifier_info *info = ptr;
854 	struct netlink_ext_ack *extack;
855 	struct net_device *dev;
856 
857 	dev = netdev_notifier_info_to_dev(info);
858 	extack = netdev_notifier_info_to_extack(info);
859 
860 	switch (event) {
861 	case NETDEV_FEAT_CHANGE:
862 		ethnl_notify_features(ptr);
863 		break;
864 	case NETDEV_PRE_UP:
865 		if (dev->ethtool->module_fw_flash_in_progress) {
866 			NL_SET_ERR_MSG(extack, "Can't set port up while flashing module firmware");
867 			return NOTIFY_BAD;
868 		}
869 	}
870 
871 	return NOTIFY_DONE;
872 }
873 
874 static struct notifier_block ethnl_netdev_notifier = {
875 	.notifier_call = ethnl_netdev_event,
876 };
877 
878 /* genetlink setup */
879 
880 static const struct genl_ops ethtool_genl_ops[] = {
881 	{
882 		.cmd	= ETHTOOL_MSG_STRSET_GET,
883 		.doit	= ethnl_default_doit,
884 		.start	= ethnl_default_start,
885 		.dumpit	= ethnl_default_dumpit,
886 		.done	= ethnl_default_done,
887 		.policy = ethnl_strset_get_policy,
888 		.maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1,
889 	},
890 	{
891 		.cmd	= ETHTOOL_MSG_LINKINFO_GET,
892 		.doit	= ethnl_default_doit,
893 		.start	= ethnl_default_start,
894 		.dumpit	= ethnl_default_dumpit,
895 		.done	= ethnl_default_done,
896 		.policy = ethnl_linkinfo_get_policy,
897 		.maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1,
898 	},
899 	{
900 		.cmd	= ETHTOOL_MSG_LINKINFO_SET,
901 		.flags	= GENL_UNS_ADMIN_PERM,
902 		.doit	= ethnl_default_set_doit,
903 		.policy = ethnl_linkinfo_set_policy,
904 		.maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1,
905 	},
906 	{
907 		.cmd	= ETHTOOL_MSG_LINKMODES_GET,
908 		.doit	= ethnl_default_doit,
909 		.start	= ethnl_default_start,
910 		.dumpit	= ethnl_default_dumpit,
911 		.done	= ethnl_default_done,
912 		.policy = ethnl_linkmodes_get_policy,
913 		.maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1,
914 	},
915 	{
916 		.cmd	= ETHTOOL_MSG_LINKMODES_SET,
917 		.flags	= GENL_UNS_ADMIN_PERM,
918 		.doit	= ethnl_default_set_doit,
919 		.policy = ethnl_linkmodes_set_policy,
920 		.maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1,
921 	},
922 	{
923 		.cmd	= ETHTOOL_MSG_LINKSTATE_GET,
924 		.doit	= ethnl_default_doit,
925 		.start	= ethnl_default_start,
926 		.dumpit	= ethnl_default_dumpit,
927 		.done	= ethnl_default_done,
928 		.policy = ethnl_linkstate_get_policy,
929 		.maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1,
930 	},
931 	{
932 		.cmd	= ETHTOOL_MSG_DEBUG_GET,
933 		.doit	= ethnl_default_doit,
934 		.start	= ethnl_default_start,
935 		.dumpit	= ethnl_default_dumpit,
936 		.done	= ethnl_default_done,
937 		.policy = ethnl_debug_get_policy,
938 		.maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1,
939 	},
940 	{
941 		.cmd	= ETHTOOL_MSG_DEBUG_SET,
942 		.flags	= GENL_UNS_ADMIN_PERM,
943 		.doit	= ethnl_default_set_doit,
944 		.policy = ethnl_debug_set_policy,
945 		.maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1,
946 	},
947 	{
948 		.cmd	= ETHTOOL_MSG_WOL_GET,
949 		.flags	= GENL_UNS_ADMIN_PERM,
950 		.doit	= ethnl_default_doit,
951 		.start	= ethnl_default_start,
952 		.dumpit	= ethnl_default_dumpit,
953 		.done	= ethnl_default_done,
954 		.policy = ethnl_wol_get_policy,
955 		.maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1,
956 	},
957 	{
958 		.cmd	= ETHTOOL_MSG_WOL_SET,
959 		.flags	= GENL_UNS_ADMIN_PERM,
960 		.doit	= ethnl_default_set_doit,
961 		.policy = ethnl_wol_set_policy,
962 		.maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1,
963 	},
964 	{
965 		.cmd	= ETHTOOL_MSG_FEATURES_GET,
966 		.doit	= ethnl_default_doit,
967 		.start	= ethnl_default_start,
968 		.dumpit	= ethnl_default_dumpit,
969 		.done	= ethnl_default_done,
970 		.policy = ethnl_features_get_policy,
971 		.maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1,
972 	},
973 	{
974 		.cmd	= ETHTOOL_MSG_FEATURES_SET,
975 		.flags	= GENL_UNS_ADMIN_PERM,
976 		.doit	= ethnl_set_features,
977 		.policy = ethnl_features_set_policy,
978 		.maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1,
979 	},
980 	{
981 		.cmd	= ETHTOOL_MSG_PRIVFLAGS_GET,
982 		.doit	= ethnl_default_doit,
983 		.start	= ethnl_default_start,
984 		.dumpit	= ethnl_default_dumpit,
985 		.done	= ethnl_default_done,
986 		.policy = ethnl_privflags_get_policy,
987 		.maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1,
988 	},
989 	{
990 		.cmd	= ETHTOOL_MSG_PRIVFLAGS_SET,
991 		.flags	= GENL_UNS_ADMIN_PERM,
992 		.doit	= ethnl_default_set_doit,
993 		.policy = ethnl_privflags_set_policy,
994 		.maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1,
995 	},
996 	{
997 		.cmd	= ETHTOOL_MSG_RINGS_GET,
998 		.doit	= ethnl_default_doit,
999 		.start	= ethnl_default_start,
1000 		.dumpit	= ethnl_default_dumpit,
1001 		.done	= ethnl_default_done,
1002 		.policy = ethnl_rings_get_policy,
1003 		.maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1,
1004 	},
1005 	{
1006 		.cmd	= ETHTOOL_MSG_RINGS_SET,
1007 		.flags	= GENL_UNS_ADMIN_PERM,
1008 		.doit	= ethnl_default_set_doit,
1009 		.policy = ethnl_rings_set_policy,
1010 		.maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1,
1011 	},
1012 	{
1013 		.cmd	= ETHTOOL_MSG_CHANNELS_GET,
1014 		.doit	= ethnl_default_doit,
1015 		.start	= ethnl_default_start,
1016 		.dumpit	= ethnl_default_dumpit,
1017 		.done	= ethnl_default_done,
1018 		.policy = ethnl_channels_get_policy,
1019 		.maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1,
1020 	},
1021 	{
1022 		.cmd	= ETHTOOL_MSG_CHANNELS_SET,
1023 		.flags	= GENL_UNS_ADMIN_PERM,
1024 		.doit	= ethnl_default_set_doit,
1025 		.policy = ethnl_channels_set_policy,
1026 		.maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1,
1027 	},
1028 	{
1029 		.cmd	= ETHTOOL_MSG_COALESCE_GET,
1030 		.doit	= ethnl_default_doit,
1031 		.start	= ethnl_default_start,
1032 		.dumpit	= ethnl_default_dumpit,
1033 		.done	= ethnl_default_done,
1034 		.policy = ethnl_coalesce_get_policy,
1035 		.maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1,
1036 	},
1037 	{
1038 		.cmd	= ETHTOOL_MSG_COALESCE_SET,
1039 		.flags	= GENL_UNS_ADMIN_PERM,
1040 		.doit	= ethnl_default_set_doit,
1041 		.policy = ethnl_coalesce_set_policy,
1042 		.maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1,
1043 	},
1044 	{
1045 		.cmd	= ETHTOOL_MSG_PAUSE_GET,
1046 		.doit	= ethnl_default_doit,
1047 		.start	= ethnl_default_start,
1048 		.dumpit	= ethnl_default_dumpit,
1049 		.done	= ethnl_default_done,
1050 		.policy = ethnl_pause_get_policy,
1051 		.maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1,
1052 	},
1053 	{
1054 		.cmd	= ETHTOOL_MSG_PAUSE_SET,
1055 		.flags	= GENL_UNS_ADMIN_PERM,
1056 		.doit	= ethnl_default_set_doit,
1057 		.policy = ethnl_pause_set_policy,
1058 		.maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1,
1059 	},
1060 	{
1061 		.cmd	= ETHTOOL_MSG_EEE_GET,
1062 		.doit	= ethnl_default_doit,
1063 		.start	= ethnl_default_start,
1064 		.dumpit	= ethnl_default_dumpit,
1065 		.done	= ethnl_default_done,
1066 		.policy = ethnl_eee_get_policy,
1067 		.maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1,
1068 	},
1069 	{
1070 		.cmd	= ETHTOOL_MSG_EEE_SET,
1071 		.flags	= GENL_UNS_ADMIN_PERM,
1072 		.doit	= ethnl_default_set_doit,
1073 		.policy = ethnl_eee_set_policy,
1074 		.maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1,
1075 	},
1076 	{
1077 		.cmd	= ETHTOOL_MSG_TSINFO_GET,
1078 		.doit	= ethnl_default_doit,
1079 		.start	= ethnl_tsinfo_start,
1080 		.dumpit	= ethnl_tsinfo_dumpit,
1081 		.done	= ethnl_tsinfo_done,
1082 		.policy = ethnl_tsinfo_get_policy,
1083 		.maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1,
1084 	},
1085 	{
1086 		.cmd	= ETHTOOL_MSG_CABLE_TEST_ACT,
1087 		.flags	= GENL_UNS_ADMIN_PERM,
1088 		.doit	= ethnl_act_cable_test,
1089 		.policy = ethnl_cable_test_act_policy,
1090 		.maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1,
1091 	},
1092 	{
1093 		.cmd	= ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
1094 		.flags	= GENL_UNS_ADMIN_PERM,
1095 		.doit	= ethnl_act_cable_test_tdr,
1096 		.policy = ethnl_cable_test_tdr_act_policy,
1097 		.maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1,
1098 	},
1099 	{
1100 		.cmd	= ETHTOOL_MSG_TUNNEL_INFO_GET,
1101 		.doit	= ethnl_tunnel_info_doit,
1102 		.start	= ethnl_tunnel_info_start,
1103 		.dumpit	= ethnl_tunnel_info_dumpit,
1104 		.policy = ethnl_tunnel_info_get_policy,
1105 		.maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1,
1106 	},
1107 	{
1108 		.cmd	= ETHTOOL_MSG_FEC_GET,
1109 		.doit	= ethnl_default_doit,
1110 		.start	= ethnl_default_start,
1111 		.dumpit	= ethnl_default_dumpit,
1112 		.done	= ethnl_default_done,
1113 		.policy = ethnl_fec_get_policy,
1114 		.maxattr = ARRAY_SIZE(ethnl_fec_get_policy) - 1,
1115 	},
1116 	{
1117 		.cmd	= ETHTOOL_MSG_FEC_SET,
1118 		.flags	= GENL_UNS_ADMIN_PERM,
1119 		.doit	= ethnl_default_set_doit,
1120 		.policy = ethnl_fec_set_policy,
1121 		.maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1,
1122 	},
1123 	{
1124 		.cmd	= ETHTOOL_MSG_MODULE_EEPROM_GET,
1125 		.flags  = GENL_UNS_ADMIN_PERM,
1126 		.doit	= ethnl_default_doit,
1127 		.start	= ethnl_default_start,
1128 		.dumpit	= ethnl_default_dumpit,
1129 		.done	= ethnl_default_done,
1130 		.policy = ethnl_module_eeprom_get_policy,
1131 		.maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1,
1132 	},
1133 	{
1134 		.cmd	= ETHTOOL_MSG_STATS_GET,
1135 		.doit	= ethnl_default_doit,
1136 		.start	= ethnl_default_start,
1137 		.dumpit	= ethnl_default_dumpit,
1138 		.done	= ethnl_default_done,
1139 		.policy = ethnl_stats_get_policy,
1140 		.maxattr = ARRAY_SIZE(ethnl_stats_get_policy) - 1,
1141 	},
1142 	{
1143 		.cmd	= ETHTOOL_MSG_PHC_VCLOCKS_GET,
1144 		.doit	= ethnl_default_doit,
1145 		.start	= ethnl_default_start,
1146 		.dumpit	= ethnl_default_dumpit,
1147 		.done	= ethnl_default_done,
1148 		.policy = ethnl_phc_vclocks_get_policy,
1149 		.maxattr = ARRAY_SIZE(ethnl_phc_vclocks_get_policy) - 1,
1150 	},
1151 	{
1152 		.cmd	= ETHTOOL_MSG_MODULE_GET,
1153 		.doit	= ethnl_default_doit,
1154 		.start	= ethnl_default_start,
1155 		.dumpit	= ethnl_default_dumpit,
1156 		.done	= ethnl_default_done,
1157 		.policy = ethnl_module_get_policy,
1158 		.maxattr = ARRAY_SIZE(ethnl_module_get_policy) - 1,
1159 	},
1160 	{
1161 		.cmd	= ETHTOOL_MSG_MODULE_SET,
1162 		.flags	= GENL_UNS_ADMIN_PERM,
1163 		.doit	= ethnl_default_set_doit,
1164 		.policy = ethnl_module_set_policy,
1165 		.maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1,
1166 	},
1167 	{
1168 		.cmd	= ETHTOOL_MSG_PSE_GET,
1169 		.doit	= ethnl_default_doit,
1170 		.start	= ethnl_default_start,
1171 		.dumpit	= ethnl_default_dumpit,
1172 		.done	= ethnl_default_done,
1173 		.policy = ethnl_pse_get_policy,
1174 		.maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1,
1175 	},
1176 	{
1177 		.cmd	= ETHTOOL_MSG_PSE_SET,
1178 		.flags	= GENL_UNS_ADMIN_PERM,
1179 		.doit	= ethnl_default_set_doit,
1180 		.policy = ethnl_pse_set_policy,
1181 		.maxattr = ARRAY_SIZE(ethnl_pse_set_policy) - 1,
1182 	},
1183 	{
1184 		.cmd	= ETHTOOL_MSG_RSS_GET,
1185 		.doit	= ethnl_default_doit,
1186 		.start	= ethnl_rss_dump_start,
1187 		.dumpit	= ethnl_rss_dumpit,
1188 		.policy = ethnl_rss_get_policy,
1189 		.maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1,
1190 	},
1191 	{
1192 		.cmd	= ETHTOOL_MSG_PLCA_GET_CFG,
1193 		.doit	= ethnl_default_doit,
1194 		.start	= ethnl_default_start,
1195 		.dumpit	= ethnl_default_dumpit,
1196 		.done	= ethnl_default_done,
1197 		.policy = ethnl_plca_get_cfg_policy,
1198 		.maxattr = ARRAY_SIZE(ethnl_plca_get_cfg_policy) - 1,
1199 	},
1200 	{
1201 		.cmd	= ETHTOOL_MSG_PLCA_SET_CFG,
1202 		.flags	= GENL_UNS_ADMIN_PERM,
1203 		.doit	= ethnl_default_set_doit,
1204 		.policy = ethnl_plca_set_cfg_policy,
1205 		.maxattr = ARRAY_SIZE(ethnl_plca_set_cfg_policy) - 1,
1206 	},
1207 	{
1208 		.cmd	= ETHTOOL_MSG_PLCA_GET_STATUS,
1209 		.doit	= ethnl_default_doit,
1210 		.start	= ethnl_default_start,
1211 		.dumpit	= ethnl_default_dumpit,
1212 		.done	= ethnl_default_done,
1213 		.policy = ethnl_plca_get_status_policy,
1214 		.maxattr = ARRAY_SIZE(ethnl_plca_get_status_policy) - 1,
1215 	},
1216 	{
1217 		.cmd	= ETHTOOL_MSG_MM_GET,
1218 		.doit	= ethnl_default_doit,
1219 		.start	= ethnl_default_start,
1220 		.dumpit	= ethnl_default_dumpit,
1221 		.done	= ethnl_default_done,
1222 		.policy = ethnl_mm_get_policy,
1223 		.maxattr = ARRAY_SIZE(ethnl_mm_get_policy) - 1,
1224 	},
1225 	{
1226 		.cmd	= ETHTOOL_MSG_MM_SET,
1227 		.flags	= GENL_UNS_ADMIN_PERM,
1228 		.doit	= ethnl_default_set_doit,
1229 		.policy = ethnl_mm_set_policy,
1230 		.maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1,
1231 	},
1232 	{
1233 		.cmd	= ETHTOOL_MSG_MODULE_FW_FLASH_ACT,
1234 		.flags	= GENL_UNS_ADMIN_PERM,
1235 		.doit	= ethnl_act_module_fw_flash,
1236 		.policy	= ethnl_module_fw_flash_act_policy,
1237 		.maxattr = ARRAY_SIZE(ethnl_module_fw_flash_act_policy) - 1,
1238 	},
1239 	{
1240 		.cmd	= ETHTOOL_MSG_PHY_GET,
1241 		.doit	= ethnl_phy_doit,
1242 		.start	= ethnl_phy_start,
1243 		.dumpit	= ethnl_phy_dumpit,
1244 		.done	= ethnl_phy_done,
1245 		.policy = ethnl_phy_get_policy,
1246 		.maxattr = ARRAY_SIZE(ethnl_phy_get_policy) - 1,
1247 	},
1248 	{
1249 		.cmd	= ETHTOOL_MSG_TSCONFIG_GET,
1250 		.doit	= ethnl_default_doit,
1251 		.start	= ethnl_default_start,
1252 		.dumpit	= ethnl_default_dumpit,
1253 		.done	= ethnl_default_done,
1254 		.policy = ethnl_tsconfig_get_policy,
1255 		.maxattr = ARRAY_SIZE(ethnl_tsconfig_get_policy) - 1,
1256 	},
1257 	{
1258 		.cmd	= ETHTOOL_MSG_TSCONFIG_SET,
1259 		.flags	= GENL_UNS_ADMIN_PERM,
1260 		.doit	= ethnl_default_set_doit,
1261 		.policy = ethnl_tsconfig_set_policy,
1262 		.maxattr = ARRAY_SIZE(ethnl_tsconfig_set_policy) - 1,
1263 	},
1264 };
1265 
1266 static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
1267 	[ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME },
1268 };
1269 
1270 static struct genl_family ethtool_genl_family __ro_after_init = {
1271 	.name		= ETHTOOL_GENL_NAME,
1272 	.version	= ETHTOOL_GENL_VERSION,
1273 	.netnsok	= true,
1274 	.parallel_ops	= true,
1275 	.ops		= ethtool_genl_ops,
1276 	.n_ops		= ARRAY_SIZE(ethtool_genl_ops),
1277 	.resv_start_op	= ETHTOOL_MSG_MODULE_GET + 1,
1278 	.mcgrps		= ethtool_nl_mcgrps,
1279 	.n_mcgrps	= ARRAY_SIZE(ethtool_nl_mcgrps),
1280 	.sock_priv_size		= sizeof(struct ethnl_sock_priv),
1281 	.sock_priv_destroy	= ethnl_sock_priv_destroy,
1282 };
1283 
1284 /* module setup */
1285 
1286 static int __init ethnl_init(void)
1287 {
1288 	int ret;
1289 
1290 	ret = genl_register_family(&ethtool_genl_family);
1291 	if (WARN(ret < 0, "ethtool: genetlink family registration failed"))
1292 		return ret;
1293 	ethnl_ok = true;
1294 
1295 	ret = register_netdevice_notifier(&ethnl_netdev_notifier);
1296 	WARN(ret < 0, "ethtool: net device notifier registration failed");
1297 	return ret;
1298 }
1299 
1300 subsys_initcall(ethnl_init);
1301