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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 "netlink.h"
6
7static struct genl_family ethtool_genl_family;
8
9static bool ethnl_ok __read_mostly;
10static u32 ethnl_bcast_seq;
11
12static const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_MAX + 1] = {
13 [ETHTOOL_A_HEADER_UNSPEC] = { .type = NLA_REJECT },
14 [ETHTOOL_A_HEADER_DEV_INDEX] = { .type = NLA_U32 },
15 [ETHTOOL_A_HEADER_DEV_NAME] = { .type = NLA_NUL_STRING,
16 .len = ALTIFNAMSIZ - 1 },
17 [ETHTOOL_A_HEADER_FLAGS] = { .type = NLA_U32 },
18};
19
20/**
21 * ethnl_parse_header_dev_get() - parse request header
22 * @req_info: structure to put results into
23 * @header: nest attribute with request header
24 * @net: request netns
25 * @extack: netlink extack for error reporting
26 * @require_dev: fail if no device identified in header
27 *
28 * Parse request header in nested attribute @nest and puts results into
29 * the structure pointed to by @req_info. Extack from @info is used for error
30 * reporting. If req_info->dev is not null on return, reference to it has
31 * been taken. If error is returned, *req_info is null initialized and no
32 * reference is held.
33 *
34 * Return: 0 on success or negative error code
35 */
36int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
37 const struct nlattr *header, struct net *net,
38 struct netlink_ext_ack *extack, bool require_dev)
39{
40 struct nlattr *tb[ETHTOOL_A_HEADER_MAX + 1];
41 const struct nlattr *devname_attr;
42 struct net_device *dev = NULL;
43 u32 flags = 0;
44 int ret;
45
46 if (!header) {
47 NL_SET_ERR_MSG(extack, "request header missing");
48 return -EINVAL;
49 }
50 ret = nla_parse_nested(tb, ETHTOOL_A_HEADER_MAX, header,
51 ethnl_header_policy, extack);
52 if (ret < 0)
53 return ret;
54 if (tb[ETHTOOL_A_HEADER_FLAGS]) {
55 flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]);
56 if (flags & ~ETHTOOL_FLAG_ALL) {
57 NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_HEADER_FLAGS],
58 "unrecognized request flags");
59 nl_set_extack_cookie_u32(extack, ETHTOOL_FLAG_ALL);
60 return -EOPNOTSUPP;
61 }
62 }
63
64 devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME];
65 if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) {
66 u32 ifindex = nla_get_u32(tb[ETHTOOL_A_HEADER_DEV_INDEX]);
67
68 dev = dev_get_by_index(net, ifindex);
69 if (!dev) {
70 NL_SET_ERR_MSG_ATTR(extack,
71 tb[ETHTOOL_A_HEADER_DEV_INDEX],
72 "no device matches ifindex");
73 return -ENODEV;
74 }
75 /* if both ifindex and ifname are passed, they must match */
76 if (devname_attr &&
77 strncmp(dev->name, nla_data(devname_attr), IFNAMSIZ)) {
78 dev_put(dev);
79 NL_SET_ERR_MSG_ATTR(extack, header,
80 "ifindex and name do not match");
81 return -ENODEV;
82 }
83 } else if (devname_attr) {
84 dev = dev_get_by_name(net, nla_data(devname_attr));
85 if (!dev) {
86 NL_SET_ERR_MSG_ATTR(extack, devname_attr,
87 "no device matches name");
88 return -ENODEV;
89 }
90 } else if (require_dev) {
91 NL_SET_ERR_MSG_ATTR(extack, header,
92 "neither ifindex nor name specified");
93 return -EINVAL;
94 }
95
96 if (dev && !netif_device_present(dev)) {
97 dev_put(dev);
98 NL_SET_ERR_MSG(extack, "device not present");
99 return -ENODEV;
100 }
101
102 req_info->dev = dev;
103 req_info->flags = flags;
104 return 0;
105}
106
107/**
108 * ethnl_fill_reply_header() - Put common header into a reply message
109 * @skb: skb with the message
110 * @dev: network device to describe in header
111 * @attrtype: attribute type to use for the nest
112 *
113 * Create a nested attribute with attributes describing given network device.
114 *
115 * Return: 0 on success, error value (-EMSGSIZE only) on error
116 */
117int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev,
118 u16 attrtype)
119{
120 struct nlattr *nest;
121
122 if (!dev)
123 return 0;
124 nest = nla_nest_start(skb, attrtype);
125 if (!nest)
126 return -EMSGSIZE;
127
128 if (nla_put_u32(skb, ETHTOOL_A_HEADER_DEV_INDEX, (u32)dev->ifindex) ||
129 nla_put_string(skb, ETHTOOL_A_HEADER_DEV_NAME, dev->name))
130 goto nla_put_failure;
131 /* If more attributes are put into reply header, ethnl_header_size()
132 * must be updated to account for them.
133 */
134
135 nla_nest_end(skb, nest);
136 return 0;
137
138nla_put_failure:
139 nla_nest_cancel(skb, nest);
140 return -EMSGSIZE;
141}
142
143/**
144 * ethnl_reply_init() - Create skb for a reply and fill device identification
145 * @payload: payload length (without netlink and genetlink header)
146 * @dev: device the reply is about (may be null)
147 * @cmd: ETHTOOL_MSG_* message type for reply
148 * @hdr_attrtype: attribute type for common header
149 * @info: genetlink info of the received packet we respond to
150 * @ehdrp: place to store payload pointer returned by genlmsg_new()
151 *
152 * Return: pointer to allocated skb on success, NULL on error
153 */
154struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
155 u16 hdr_attrtype, struct genl_info *info,
156 void **ehdrp)
157{
158 struct sk_buff *skb;
159
160 skb = genlmsg_new(payload, GFP_KERNEL);
161 if (!skb)
162 goto err;
163 *ehdrp = genlmsg_put_reply(skb, info, ðtool_genl_family, 0, cmd);
164 if (!*ehdrp)
165 goto err_free;
166
167 if (dev) {
168 int ret;
169
170 ret = ethnl_fill_reply_header(skb, dev, hdr_attrtype);
171 if (ret < 0)
172 goto err_free;
173 }
174 return skb;
175
176err_free:
177 nlmsg_free(skb);
178err:
179 if (info)
180 GENL_SET_ERR_MSG(info, "failed to setup reply message");
181 return NULL;
182}
183
184void *ethnl_dump_put(struct sk_buff *skb, struct netlink_callback *cb, u8 cmd)
185{
186 return genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
187 ðtool_genl_family, 0, cmd);
188}
189
190void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd)
191{
192 return genlmsg_put(skb, 0, ++ethnl_bcast_seq, ðtool_genl_family, 0,
193 cmd);
194}
195
196int ethnl_multicast(struct sk_buff *skb, struct net_device *dev)
197{
198 return genlmsg_multicast_netns(ðtool_genl_family, dev_net(dev), skb,
199 0, ETHNL_MCGRP_MONITOR, GFP_KERNEL);
200}
201
202/* GET request helpers */
203
204/**
205 * struct ethnl_dump_ctx - context structure for generic dumpit() callback
206 * @ops: request ops of currently processed message type
207 * @req_info: parsed request header of processed request
208 * @reply_data: data needed to compose the reply
209 * @pos_hash: saved iteration position - hashbucket
210 * @pos_idx: saved iteration position - index
211 *
212 * These parameters are kept in struct netlink_callback as context preserved
213 * between iterations. They are initialized by ethnl_default_start() and used
214 * in ethnl_default_dumpit() and ethnl_default_done().
215 */
216struct ethnl_dump_ctx {
217 const struct ethnl_request_ops *ops;
218 struct ethnl_req_info *req_info;
219 struct ethnl_reply_data *reply_data;
220 int pos_hash;
221 int pos_idx;
222};
223
224static const struct ethnl_request_ops *
225ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
226 [ETHTOOL_MSG_STRSET_GET] = ðnl_strset_request_ops,
227 [ETHTOOL_MSG_LINKINFO_GET] = ðnl_linkinfo_request_ops,
228 [ETHTOOL_MSG_LINKMODES_GET] = ðnl_linkmodes_request_ops,
229 [ETHTOOL_MSG_LINKSTATE_GET] = ðnl_linkstate_request_ops,
230 [ETHTOOL_MSG_DEBUG_GET] = ðnl_debug_request_ops,
231 [ETHTOOL_MSG_WOL_GET] = ðnl_wol_request_ops,
232 [ETHTOOL_MSG_FEATURES_GET] = ðnl_features_request_ops,
233 [ETHTOOL_MSG_PRIVFLAGS_GET] = ðnl_privflags_request_ops,
234 [ETHTOOL_MSG_RINGS_GET] = ðnl_rings_request_ops,
235 [ETHTOOL_MSG_CHANNELS_GET] = ðnl_channels_request_ops,
236 [ETHTOOL_MSG_COALESCE_GET] = ðnl_coalesce_request_ops,
237 [ETHTOOL_MSG_PAUSE_GET] = ðnl_pause_request_ops,
238 [ETHTOOL_MSG_EEE_GET] = ðnl_eee_request_ops,
239 [ETHTOOL_MSG_TSINFO_GET] = ðnl_tsinfo_request_ops,
240};
241
242static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
243{
244 return (struct ethnl_dump_ctx *)cb->ctx;
245}
246
247/**
248 * ethnl_default_parse() - Parse request message
249 * @req_info: pointer to structure to put data into
250 * @nlhdr: pointer to request message header
251 * @net: request netns
252 * @request_ops: struct request_ops for request type
253 * @extack: netlink extack for error reporting
254 * @require_dev: fail if no device identified in header
255 *
256 * Parse universal request header and call request specific ->parse_request()
257 * callback (if defined) to parse the rest of the message.
258 *
259 * Return: 0 on success or negative error code
260 */
261static int ethnl_default_parse(struct ethnl_req_info *req_info,
262 const struct nlmsghdr *nlhdr, struct net *net,
263 const struct ethnl_request_ops *request_ops,
264 struct netlink_ext_ack *extack, bool require_dev)
265{
266 struct nlattr **tb;
267 int ret;
268
269 tb = kmalloc_array(request_ops->max_attr + 1, sizeof(tb[0]),
270 GFP_KERNEL);
271 if (!tb)
272 return -ENOMEM;
273
274 ret = nlmsg_parse(nlhdr, GENL_HDRLEN, tb, request_ops->max_attr,
275 request_ops->request_policy, extack);
276 if (ret < 0)
277 goto out;
278 ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr],
279 net, extack, require_dev);
280 if (ret < 0)
281 goto out;
282
283 if (request_ops->parse_request) {
284 ret = request_ops->parse_request(req_info, tb, extack);
285 if (ret < 0)
286 goto out;
287 }
288
289 ret = 0;
290out:
291 kfree(tb);
292 return ret;
293}
294
295/**
296 * ethnl_init_reply_data() - Initialize reply data for GET request
297 * @reply_data: pointer to embedded struct ethnl_reply_data
298 * @ops: instance of struct ethnl_request_ops describing the layout
299 * @dev: network device to initialize the reply for
300 *
301 * Fills the reply data part with zeros and sets the dev member. Must be called
302 * before calling the ->fill_reply() callback (for each iteration when handling
303 * dump requests).
304 */
305static void ethnl_init_reply_data(struct ethnl_reply_data *reply_data,
306 const struct ethnl_request_ops *ops,
307 struct net_device *dev)
308{
309 memset(reply_data, 0, ops->reply_data_size);
310 reply_data->dev = dev;
311}
312
313/* default ->doit() handler for GET type requests */
314static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info)
315{
316 struct ethnl_reply_data *reply_data = NULL;
317 struct ethnl_req_info *req_info = NULL;
318 const u8 cmd = info->genlhdr->cmd;
319 const struct ethnl_request_ops *ops;
320 struct sk_buff *rskb;
321 void *reply_payload;
322 int reply_len;
323 int ret;
324
325 ops = ethnl_default_requests[cmd];
326 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
327 return -EOPNOTSUPP;
328 req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
329 if (!req_info)
330 return -ENOMEM;
331 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
332 if (!reply_data) {
333 kfree(req_info);
334 return -ENOMEM;
335 }
336
337 ret = ethnl_default_parse(req_info, info->nlhdr, genl_info_net(info), ops,
338 info->extack, !ops->allow_nodev_do);
339 if (ret < 0)
340 goto err_dev;
341 ethnl_init_reply_data(reply_data, ops, req_info->dev);
342
343 rtnl_lock();
344 ret = ops->prepare_data(req_info, reply_data, info);
345 rtnl_unlock();
346 if (ret < 0)
347 goto err_cleanup;
348 ret = ops->reply_size(req_info, reply_data);
349 if (ret < 0)
350 goto err_cleanup;
351 reply_len = ret + ethnl_reply_header_size();
352 ret = -ENOMEM;
353 rskb = ethnl_reply_init(reply_len, req_info->dev, ops->reply_cmd,
354 ops->hdr_attr, info, &reply_payload);
355 if (!rskb)
356 goto err_cleanup;
357 ret = ops->fill_reply(rskb, req_info, reply_data);
358 if (ret < 0)
359 goto err_msg;
360 if (ops->cleanup_data)
361 ops->cleanup_data(reply_data);
362
363 genlmsg_end(rskb, reply_payload);
364 if (req_info->dev)
365 dev_put(req_info->dev);
366 kfree(reply_data);
367 kfree(req_info);
368 return genlmsg_reply(rskb, info);
369
370err_msg:
371 WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len);
372 nlmsg_free(rskb);
373err_cleanup:
374 if (ops->cleanup_data)
375 ops->cleanup_data(reply_data);
376err_dev:
377 if (req_info->dev)
378 dev_put(req_info->dev);
379 kfree(reply_data);
380 kfree(req_info);
381 return ret;
382}
383
384static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev,
385 const struct ethnl_dump_ctx *ctx,
386 struct netlink_callback *cb)
387{
388 void *ehdr;
389 int ret;
390
391 ehdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
392 ðtool_genl_family, 0, ctx->ops->reply_cmd);
393 if (!ehdr)
394 return -EMSGSIZE;
395
396 ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev);
397 rtnl_lock();
398 ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, NULL);
399 rtnl_unlock();
400 if (ret < 0)
401 goto out;
402 ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr);
403 if (ret < 0)
404 goto out;
405 ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data);
406
407out:
408 if (ctx->ops->cleanup_data)
409 ctx->ops->cleanup_data(ctx->reply_data);
410 ctx->reply_data->dev = NULL;
411 if (ret < 0)
412 genlmsg_cancel(skb, ehdr);
413 else
414 genlmsg_end(skb, ehdr);
415 return ret;
416}
417
418/* Default ->dumpit() handler for GET requests. Device iteration copied from
419 * rtnl_dump_ifinfo(); we have to be more careful about device hashtable
420 * persistence as we cannot guarantee to hold RTNL lock through the whole
421 * function as rtnetnlink does.
422 */
423static int ethnl_default_dumpit(struct sk_buff *skb,
424 struct netlink_callback *cb)
425{
426 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
427 struct net *net = sock_net(skb->sk);
428 int s_idx = ctx->pos_idx;
429 int h, idx = 0;
430 int ret = 0;
431
432 rtnl_lock();
433 for (h = ctx->pos_hash; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
434 struct hlist_head *head;
435 struct net_device *dev;
436 unsigned int seq;
437
438 head = &net->dev_index_head[h];
439
440restart_chain:
441 seq = net->dev_base_seq;
442 cb->seq = seq;
443 idx = 0;
444 hlist_for_each_entry(dev, head, index_hlist) {
445 if (idx < s_idx)
446 goto cont;
447 dev_hold(dev);
448 rtnl_unlock();
449
450 ret = ethnl_default_dump_one(skb, dev, ctx, cb);
451 dev_put(dev);
452 if (ret < 0) {
453 if (ret == -EOPNOTSUPP)
454 goto lock_and_cont;
455 if (likely(skb->len))
456 ret = skb->len;
457 goto out;
458 }
459lock_and_cont:
460 rtnl_lock();
461 if (net->dev_base_seq != seq) {
462 s_idx = idx + 1;
463 goto restart_chain;
464 }
465cont:
466 idx++;
467 }
468
469 }
470 rtnl_unlock();
471
472out:
473 ctx->pos_hash = h;
474 ctx->pos_idx = idx;
475 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
476
477 return ret;
478}
479
480/* generic ->start() handler for GET requests */
481static int ethnl_default_start(struct netlink_callback *cb)
482{
483 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
484 struct ethnl_reply_data *reply_data;
485 const struct ethnl_request_ops *ops;
486 struct ethnl_req_info *req_info;
487 struct genlmsghdr *ghdr;
488 int ret;
489
490 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
491
492 ghdr = nlmsg_data(cb->nlh);
493 ops = ethnl_default_requests[ghdr->cmd];
494 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd))
495 return -EOPNOTSUPP;
496 req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
497 if (!req_info)
498 return -ENOMEM;
499 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
500 if (!reply_data) {
501 ret = -ENOMEM;
502 goto free_req_info;
503 }
504
505 ret = ethnl_default_parse(req_info, cb->nlh, sock_net(cb->skb->sk), ops,
506 cb->extack, false);
507 if (req_info->dev) {
508 /* We ignore device specification in dump requests but as the
509 * same parser as for non-dump (doit) requests is used, it
510 * would take reference to the device if it finds one
511 */
512 dev_put(req_info->dev);
513 req_info->dev = NULL;
514 }
515 if (ret < 0)
516 goto free_reply_data;
517
518 ctx->ops = ops;
519 ctx->req_info = req_info;
520 ctx->reply_data = reply_data;
521 ctx->pos_hash = 0;
522 ctx->pos_idx = 0;
523
524 return 0;
525
526free_reply_data:
527 kfree(reply_data);
528free_req_info:
529 kfree(req_info);
530
531 return ret;
532}
533
534/* default ->done() handler for GET requests */
535static int ethnl_default_done(struct netlink_callback *cb)
536{
537 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
538
539 kfree(ctx->reply_data);
540 kfree(ctx->req_info);
541
542 return 0;
543}
544
545static const struct ethnl_request_ops *
546ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
547 [ETHTOOL_MSG_LINKINFO_NTF] = ðnl_linkinfo_request_ops,
548 [ETHTOOL_MSG_LINKMODES_NTF] = ðnl_linkmodes_request_ops,
549 [ETHTOOL_MSG_DEBUG_NTF] = ðnl_debug_request_ops,
550 [ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops,
551 [ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops,
552 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ðnl_privflags_request_ops,
553 [ETHTOOL_MSG_RINGS_NTF] = ðnl_rings_request_ops,
554 [ETHTOOL_MSG_CHANNELS_NTF] = ðnl_channels_request_ops,
555 [ETHTOOL_MSG_COALESCE_NTF] = ðnl_coalesce_request_ops,
556 [ETHTOOL_MSG_PAUSE_NTF] = ðnl_pause_request_ops,
557 [ETHTOOL_MSG_EEE_NTF] = ðnl_eee_request_ops,
558};
559
560/* default notification handler */
561static void ethnl_default_notify(struct net_device *dev, unsigned int cmd,
562 const void *data)
563{
564 struct ethnl_reply_data *reply_data;
565 const struct ethnl_request_ops *ops;
566 struct ethnl_req_info *req_info;
567 struct sk_buff *skb;
568 void *reply_payload;
569 int reply_len;
570 int ret;
571
572 if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX ||
573 !ethnl_default_notify_ops[cmd],
574 "unexpected notification type %u\n", cmd))
575 return;
576 ops = ethnl_default_notify_ops[cmd];
577 req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
578 if (!req_info)
579 return;
580 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
581 if (!reply_data) {
582 kfree(req_info);
583 return;
584 }
585
586 req_info->dev = dev;
587 req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS;
588
589 ethnl_init_reply_data(reply_data, ops, dev);
590 ret = ops->prepare_data(req_info, reply_data, NULL);
591 if (ret < 0)
592 goto err_cleanup;
593 ret = ops->reply_size(req_info, reply_data);
594 if (ret < 0)
595 goto err_cleanup;
596 reply_len = ret + ethnl_reply_header_size();
597 ret = -ENOMEM;
598 skb = genlmsg_new(reply_len, GFP_KERNEL);
599 if (!skb)
600 goto err_cleanup;
601 reply_payload = ethnl_bcastmsg_put(skb, cmd);
602 if (!reply_payload)
603 goto err_skb;
604 ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr);
605 if (ret < 0)
606 goto err_msg;
607 ret = ops->fill_reply(skb, req_info, reply_data);
608 if (ret < 0)
609 goto err_msg;
610 if (ops->cleanup_data)
611 ops->cleanup_data(reply_data);
612
613 genlmsg_end(skb, reply_payload);
614 kfree(reply_data);
615 kfree(req_info);
616 ethnl_multicast(skb, dev);
617 return;
618
619err_msg:
620 WARN_ONCE(ret == -EMSGSIZE,
621 "calculated message payload length (%d) not sufficient\n",
622 reply_len);
623err_skb:
624 nlmsg_free(skb);
625err_cleanup:
626 if (ops->cleanup_data)
627 ops->cleanup_data(reply_data);
628 kfree(reply_data);
629 kfree(req_info);
630 return;
631}
632
633/* notifications */
634
635typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd,
636 const void *data);
637
638static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
639 [ETHTOOL_MSG_LINKINFO_NTF] = ethnl_default_notify,
640 [ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify,
641 [ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify,
642 [ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify,
643 [ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify,
644 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify,
645 [ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify,
646 [ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify,
647 [ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify,
648 [ETHTOOL_MSG_PAUSE_NTF] = ethnl_default_notify,
649 [ETHTOOL_MSG_EEE_NTF] = ethnl_default_notify,
650};
651
652void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
653{
654 if (unlikely(!ethnl_ok))
655 return;
656 ASSERT_RTNL();
657
658 if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) &&
659 ethnl_notify_handlers[cmd]))
660 ethnl_notify_handlers[cmd](dev, cmd, data);
661 else
662 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n",
663 cmd, netdev_name(dev));
664}
665EXPORT_SYMBOL(ethtool_notify);
666
667static void ethnl_notify_features(struct netdev_notifier_info *info)
668{
669 struct net_device *dev = netdev_notifier_info_to_dev(info);
670
671 ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL);
672}
673
674static int ethnl_netdev_event(struct notifier_block *this, unsigned long event,
675 void *ptr)
676{
677 switch (event) {
678 case NETDEV_FEAT_CHANGE:
679 ethnl_notify_features(ptr);
680 break;
681 }
682
683 return NOTIFY_DONE;
684}
685
686static struct notifier_block ethnl_netdev_notifier = {
687 .notifier_call = ethnl_netdev_event,
688};
689
690/* genetlink setup */
691
692static const struct genl_ops ethtool_genl_ops[] = {
693 {
694 .cmd = ETHTOOL_MSG_STRSET_GET,
695 .doit = ethnl_default_doit,
696 .start = ethnl_default_start,
697 .dumpit = ethnl_default_dumpit,
698 .done = ethnl_default_done,
699 },
700 {
701 .cmd = ETHTOOL_MSG_LINKINFO_GET,
702 .doit = ethnl_default_doit,
703 .start = ethnl_default_start,
704 .dumpit = ethnl_default_dumpit,
705 .done = ethnl_default_done,
706 },
707 {
708 .cmd = ETHTOOL_MSG_LINKINFO_SET,
709 .flags = GENL_UNS_ADMIN_PERM,
710 .doit = ethnl_set_linkinfo,
711 },
712 {
713 .cmd = ETHTOOL_MSG_LINKMODES_GET,
714 .doit = ethnl_default_doit,
715 .start = ethnl_default_start,
716 .dumpit = ethnl_default_dumpit,
717 .done = ethnl_default_done,
718 },
719 {
720 .cmd = ETHTOOL_MSG_LINKMODES_SET,
721 .flags = GENL_UNS_ADMIN_PERM,
722 .doit = ethnl_set_linkmodes,
723 },
724 {
725 .cmd = ETHTOOL_MSG_LINKSTATE_GET,
726 .doit = ethnl_default_doit,
727 .start = ethnl_default_start,
728 .dumpit = ethnl_default_dumpit,
729 .done = ethnl_default_done,
730 },
731 {
732 .cmd = ETHTOOL_MSG_DEBUG_GET,
733 .doit = ethnl_default_doit,
734 .start = ethnl_default_start,
735 .dumpit = ethnl_default_dumpit,
736 .done = ethnl_default_done,
737 },
738 {
739 .cmd = ETHTOOL_MSG_DEBUG_SET,
740 .flags = GENL_UNS_ADMIN_PERM,
741 .doit = ethnl_set_debug,
742 },
743 {
744 .cmd = ETHTOOL_MSG_WOL_GET,
745 .flags = GENL_UNS_ADMIN_PERM,
746 .doit = ethnl_default_doit,
747 .start = ethnl_default_start,
748 .dumpit = ethnl_default_dumpit,
749 .done = ethnl_default_done,
750 },
751 {
752 .cmd = ETHTOOL_MSG_WOL_SET,
753 .flags = GENL_UNS_ADMIN_PERM,
754 .doit = ethnl_set_wol,
755 },
756 {
757 .cmd = ETHTOOL_MSG_FEATURES_GET,
758 .doit = ethnl_default_doit,
759 .start = ethnl_default_start,
760 .dumpit = ethnl_default_dumpit,
761 .done = ethnl_default_done,
762 },
763 {
764 .cmd = ETHTOOL_MSG_FEATURES_SET,
765 .flags = GENL_UNS_ADMIN_PERM,
766 .doit = ethnl_set_features,
767 },
768 {
769 .cmd = ETHTOOL_MSG_PRIVFLAGS_GET,
770 .doit = ethnl_default_doit,
771 .start = ethnl_default_start,
772 .dumpit = ethnl_default_dumpit,
773 .done = ethnl_default_done,
774 },
775 {
776 .cmd = ETHTOOL_MSG_PRIVFLAGS_SET,
777 .flags = GENL_UNS_ADMIN_PERM,
778 .doit = ethnl_set_privflags,
779 },
780 {
781 .cmd = ETHTOOL_MSG_RINGS_GET,
782 .doit = ethnl_default_doit,
783 .start = ethnl_default_start,
784 .dumpit = ethnl_default_dumpit,
785 .done = ethnl_default_done,
786 },
787 {
788 .cmd = ETHTOOL_MSG_RINGS_SET,
789 .flags = GENL_UNS_ADMIN_PERM,
790 .doit = ethnl_set_rings,
791 },
792 {
793 .cmd = ETHTOOL_MSG_CHANNELS_GET,
794 .doit = ethnl_default_doit,
795 .start = ethnl_default_start,
796 .dumpit = ethnl_default_dumpit,
797 .done = ethnl_default_done,
798 },
799 {
800 .cmd = ETHTOOL_MSG_CHANNELS_SET,
801 .flags = GENL_UNS_ADMIN_PERM,
802 .doit = ethnl_set_channels,
803 },
804 {
805 .cmd = ETHTOOL_MSG_COALESCE_GET,
806 .doit = ethnl_default_doit,
807 .start = ethnl_default_start,
808 .dumpit = ethnl_default_dumpit,
809 .done = ethnl_default_done,
810 },
811 {
812 .cmd = ETHTOOL_MSG_COALESCE_SET,
813 .flags = GENL_UNS_ADMIN_PERM,
814 .doit = ethnl_set_coalesce,
815 },
816 {
817 .cmd = ETHTOOL_MSG_PAUSE_GET,
818 .doit = ethnl_default_doit,
819 .start = ethnl_default_start,
820 .dumpit = ethnl_default_dumpit,
821 .done = ethnl_default_done,
822 },
823 {
824 .cmd = ETHTOOL_MSG_PAUSE_SET,
825 .flags = GENL_UNS_ADMIN_PERM,
826 .doit = ethnl_set_pause,
827 },
828 {
829 .cmd = ETHTOOL_MSG_EEE_GET,
830 .doit = ethnl_default_doit,
831 .start = ethnl_default_start,
832 .dumpit = ethnl_default_dumpit,
833 .done = ethnl_default_done,
834 },
835 {
836 .cmd = ETHTOOL_MSG_EEE_SET,
837 .flags = GENL_UNS_ADMIN_PERM,
838 .doit = ethnl_set_eee,
839 },
840 {
841 .cmd = ETHTOOL_MSG_TSINFO_GET,
842 .doit = ethnl_default_doit,
843 .start = ethnl_default_start,
844 .dumpit = ethnl_default_dumpit,
845 .done = ethnl_default_done,
846 },
847 {
848 .cmd = ETHTOOL_MSG_CABLE_TEST_ACT,
849 .flags = GENL_UNS_ADMIN_PERM,
850 .doit = ethnl_act_cable_test,
851 },
852 {
853 .cmd = ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
854 .flags = GENL_UNS_ADMIN_PERM,
855 .doit = ethnl_act_cable_test_tdr,
856 },
857 {
858 .cmd = ETHTOOL_MSG_TUNNEL_INFO_GET,
859 .doit = ethnl_tunnel_info_doit,
860 .start = ethnl_tunnel_info_start,
861 .dumpit = ethnl_tunnel_info_dumpit,
862 },
863};
864
865static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
866 [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME },
867};
868
869static struct genl_family ethtool_genl_family __ro_after_init = {
870 .name = ETHTOOL_GENL_NAME,
871 .version = ETHTOOL_GENL_VERSION,
872 .netnsok = true,
873 .parallel_ops = true,
874 .ops = ethtool_genl_ops,
875 .n_ops = ARRAY_SIZE(ethtool_genl_ops),
876 .mcgrps = ethtool_nl_mcgrps,
877 .n_mcgrps = ARRAY_SIZE(ethtool_nl_mcgrps),
878};
879
880/* module setup */
881
882static int __init ethnl_init(void)
883{
884 int ret;
885
886 ret = genl_register_family(ðtool_genl_family);
887 if (WARN(ret < 0, "ethtool: genetlink family registration failed"))
888 return ret;
889 ethnl_ok = true;
890
891 ret = register_netdevice_notifier(ðnl_netdev_notifier);
892 WARN(ret < 0, "ethtool: net device notifier registration failed");
893 return ret;
894}
895
896subsys_initcall(ethnl_init);