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