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octeontx2-pf: Fix error return code in otx2_probe()
[linux/fpc-iii.git] / net / ethtool / netlink.c
blob0c772318c02321d8b6107f81c6d5fb48e21b61f6
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
7 static struct genl_family ethtool_genl_family;
8
9 static bool ethnl_ok __read_mostly;
10 static u32 ethnl_bcast_seq;
11
12 static 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 */
36 int 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 */
117 int 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
138 nla_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 */
154 struct 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, &ethtool_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
176 err_free:
177 nlmsg_free(skb);
178 err:
179 if (info)
180 GENL_SET_ERR_MSG(info, "failed to setup reply message");
181 return NULL;
182 }
183
184 static void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd)
185 {
186 return genlmsg_put(skb, 0, ++ethnl_bcast_seq, &ethtool_genl_family, 0,
187 cmd);
188 }
189
190 static int ethnl_multicast(struct sk_buff *skb, struct net_device *dev)
191 {
192 return genlmsg_multicast_netns(&ethtool_genl_family, dev_net(dev), skb,
193 0, ETHNL_MCGRP_MONITOR, GFP_KERNEL);
194 }
195
196 /* GET request helpers */
197
198 /**
199 * struct ethnl_dump_ctx - context structure for generic dumpit() callback
200 * @ops: request ops of currently processed message type
201 * @req_info: parsed request header of processed request
202 * @reply_data: data needed to compose the reply
203 * @pos_hash: saved iteration position - hashbucket
204 * @pos_idx: saved iteration position - index
205 *
206 * These parameters are kept in struct netlink_callback as context preserved
207 * between iterations. They are initialized by ethnl_default_start() and used
208 * in ethnl_default_dumpit() and ethnl_default_done().
209 */
210 struct ethnl_dump_ctx {
211 const struct ethnl_request_ops *ops;
212 struct ethnl_req_info *req_info;
213 struct ethnl_reply_data *reply_data;
214 int pos_hash;
215 int pos_idx;
216 };
217
218 static const struct ethnl_request_ops *
219 ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
220 [ETHTOOL_MSG_STRSET_GET] = &ethnl_strset_request_ops,
221 [ETHTOOL_MSG_LINKINFO_GET] = &ethnl_linkinfo_request_ops,
222 [ETHTOOL_MSG_LINKMODES_GET] = &ethnl_linkmodes_request_ops,
223 [ETHTOOL_MSG_LINKSTATE_GET] = &ethnl_linkstate_request_ops,
224 [ETHTOOL_MSG_DEBUG_GET] = &ethnl_debug_request_ops,
225 [ETHTOOL_MSG_WOL_GET] = &ethnl_wol_request_ops,
226 [ETHTOOL_MSG_FEATURES_GET] = &ethnl_features_request_ops,
227 [ETHTOOL_MSG_PRIVFLAGS_GET] = &ethnl_privflags_request_ops,
228 [ETHTOOL_MSG_RINGS_GET] = &ethnl_rings_request_ops,
229 [ETHTOOL_MSG_CHANNELS_GET] = &ethnl_channels_request_ops,
230 [ETHTOOL_MSG_COALESCE_GET] = &ethnl_coalesce_request_ops,
231 [ETHTOOL_MSG_PAUSE_GET] = &ethnl_pause_request_ops,
232 [ETHTOOL_MSG_EEE_GET] = &ethnl_eee_request_ops,
233 [ETHTOOL_MSG_TSINFO_GET] = &ethnl_tsinfo_request_ops,
234 };
235
236 static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
237 {
238 return (struct ethnl_dump_ctx *)cb->ctx;
239 }
240
241 /**
242 * ethnl_default_parse() - Parse request message
243 * @req_info: pointer to structure to put data into
244 * @nlhdr: pointer to request message header
245 * @net: request netns
246 * @request_ops: struct request_ops for request type
247 * @extack: netlink extack for error reporting
248 * @require_dev: fail if no device identified in header
249 *
250 * Parse universal request header and call request specific ->parse_request()
251 * callback (if defined) to parse the rest of the message.
252 *
253 * Return: 0 on success or negative error code
254 */
255 static int ethnl_default_parse(struct ethnl_req_info *req_info,
256 const struct nlmsghdr *nlhdr, struct net *net,
257 const struct ethnl_request_ops *request_ops,
258 struct netlink_ext_ack *extack, bool require_dev)
259 {
260 struct nlattr **tb;
261 int ret;
262
263 tb = kmalloc_array(request_ops->max_attr + 1, sizeof(tb[0]),
264 GFP_KERNEL);
265 if (!tb)
266 return -ENOMEM;
267
268 ret = nlmsg_parse(nlhdr, GENL_HDRLEN, tb, request_ops->max_attr,
269 request_ops->request_policy, extack);
270 if (ret < 0)
271 goto out;
272 ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr],
273 net, extack, require_dev);
274 if (ret < 0)
275 goto out;
276
277 if (request_ops->parse_request) {
278 ret = request_ops->parse_request(req_info, tb, extack);
279 if (ret < 0)
280 goto out;
281 }
282
283 ret = 0;
284 out:
285 kfree(tb);
286 return ret;
287 }
288
289 /**
290 * ethnl_init_reply_data() - Initialize reply data for GET request
291 * @reply_data: pointer to embedded struct ethnl_reply_data
292 * @ops: instance of struct ethnl_request_ops describing the layout
293 * @dev: network device to initialize the reply for
294 *
295 * Fills the reply data part with zeros and sets the dev member. Must be called
296 * before calling the ->fill_reply() callback (for each iteration when handling
297 * dump requests).
298 */
299 static void ethnl_init_reply_data(struct ethnl_reply_data *reply_data,
300 const struct ethnl_request_ops *ops,
301 struct net_device *dev)
302 {
303 memset(reply_data, 0, ops->reply_data_size);
304 reply_data->dev = dev;
305 }
306
307 /* default ->doit() handler for GET type requests */
308 static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info)
309 {
310 struct ethnl_reply_data *reply_data = NULL;
311 struct ethnl_req_info *req_info = NULL;
312 const u8 cmd = info->genlhdr->cmd;
313 const struct ethnl_request_ops *ops;
314 struct sk_buff *rskb;
315 void *reply_payload;
316 int reply_len;
317 int ret;
318
319 ops = ethnl_default_requests[cmd];
320 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
321 return -EOPNOTSUPP;
322 req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
323 if (!req_info)
324 return -ENOMEM;
325 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
326 if (!reply_data) {
327 kfree(req_info);
328 return -ENOMEM;
329 }
330
331 ret = ethnl_default_parse(req_info, info->nlhdr, genl_info_net(info), ops,
332 info->extack, !ops->allow_nodev_do);
333 if (ret < 0)
334 goto err_dev;
335 ethnl_init_reply_data(reply_data, ops, req_info->dev);
336
337 rtnl_lock();
338 ret = ops->prepare_data(req_info, reply_data, info);
339 rtnl_unlock();
340 if (ret < 0)
341 goto err_cleanup;
342 ret = ops->reply_size(req_info, reply_data);
343 if (ret < 0)
344 goto err_cleanup;
345 reply_len = ret;
346 ret = -ENOMEM;
347 rskb = ethnl_reply_init(reply_len, req_info->dev, ops->reply_cmd,
348 ops->hdr_attr, info, &reply_payload);
349 if (!rskb)
350 goto err_cleanup;
351 ret = ops->fill_reply(rskb, req_info, reply_data);
352 if (ret < 0)
353 goto err_msg;
354 if (ops->cleanup_data)
355 ops->cleanup_data(reply_data);
356
357 genlmsg_end(rskb, reply_payload);
358 if (req_info->dev)
359 dev_put(req_info->dev);
360 kfree(reply_data);
361 kfree(req_info);
362 return genlmsg_reply(rskb, info);
363
364 err_msg:
365 WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len);
366 nlmsg_free(rskb);
367 err_cleanup:
368 if (ops->cleanup_data)
369 ops->cleanup_data(reply_data);
370 err_dev:
371 if (req_info->dev)
372 dev_put(req_info->dev);
373 kfree(reply_data);
374 kfree(req_info);
375 return ret;
376 }
377
378 static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev,
379 const struct ethnl_dump_ctx *ctx)
380 {
381 int ret;
382
383 ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev);
384 rtnl_lock();
385 ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, NULL);
386 rtnl_unlock();
387 if (ret < 0)
388 goto out;
389 ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr);
390 if (ret < 0)
391 goto out;
392 ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data);
393
394 out:
395 if (ctx->ops->cleanup_data)
396 ctx->ops->cleanup_data(ctx->reply_data);
397 ctx->reply_data->dev = NULL;
398 return ret;
399 }
400
401 /* Default ->dumpit() handler for GET requests. Device iteration copied from
402 * rtnl_dump_ifinfo(); we have to be more careful about device hashtable
403 * persistence as we cannot guarantee to hold RTNL lock through the whole
404 * function as rtnetnlink does.
405 */
406 static int ethnl_default_dumpit(struct sk_buff *skb,
407 struct netlink_callback *cb)
408 {
409 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
410 struct net *net = sock_net(skb->sk);
411 int s_idx = ctx->pos_idx;
412 int h, idx = 0;
413 int ret = 0;
414 void *ehdr;
415
416 rtnl_lock();
417 for (h = ctx->pos_hash; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
418 struct hlist_head *head;
419 struct net_device *dev;
420 unsigned int seq;
421
422 head = &net->dev_index_head[h];
423
424 restart_chain:
425 seq = net->dev_base_seq;
426 cb->seq = seq;
427 idx = 0;
428 hlist_for_each_entry(dev, head, index_hlist) {
429 if (idx < s_idx)
430 goto cont;
431 dev_hold(dev);
432 rtnl_unlock();
433
434 ehdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
435 cb->nlh->nlmsg_seq,
436 &ethtool_genl_family, 0,
437 ctx->ops->reply_cmd);
438 if (!ehdr) {
439 dev_put(dev);
440 ret = -EMSGSIZE;
441 goto out;
442 }
443 ret = ethnl_default_dump_one(skb, dev, ctx);
444 dev_put(dev);
445 if (ret < 0) {
446 genlmsg_cancel(skb, ehdr);
447 if (ret == -EOPNOTSUPP)
448 goto lock_and_cont;
449 if (likely(skb->len))
450 ret = skb->len;
451 goto out;
452 }
453 genlmsg_end(skb, ehdr);
454 lock_and_cont:
455 rtnl_lock();
456 if (net->dev_base_seq != seq) {
457 s_idx = idx + 1;
458 goto restart_chain;
459 }
460 cont:
461 idx++;
462 }
463
464 }
465 rtnl_unlock();
466
467 out:
468 ctx->pos_hash = h;
469 ctx->pos_idx = idx;
470 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
471
472 return ret;
473 }
474
475 /* generic ->start() handler for GET requests */
476 static int ethnl_default_start(struct netlink_callback *cb)
477 {
478 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
479 struct ethnl_reply_data *reply_data;
480 const struct ethnl_request_ops *ops;
481 struct ethnl_req_info *req_info;
482 struct genlmsghdr *ghdr;
483 int ret;
484
485 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
486
487 ghdr = nlmsg_data(cb->nlh);
488 ops = ethnl_default_requests[ghdr->cmd];
489 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd))
490 return -EOPNOTSUPP;
491 req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
492 if (!req_info)
493 return -ENOMEM;
494 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
495 if (!reply_data) {
496 ret = -ENOMEM;
497 goto free_req_info;
498 }
499
500 ret = ethnl_default_parse(req_info, cb->nlh, sock_net(cb->skb->sk), ops,
501 cb->extack, false);
502 if (req_info->dev) {
503 /* We ignore device specification in dump requests but as the
504 * same parser as for non-dump (doit) requests is used, it
505 * would take reference to the device if it finds one
506 */
507 dev_put(req_info->dev);
508 req_info->dev = NULL;
509 }
510 if (ret < 0)
511 goto free_reply_data;
512
513 ctx->ops = ops;
514 ctx->req_info = req_info;
515 ctx->reply_data = reply_data;
516 ctx->pos_hash = 0;
517 ctx->pos_idx = 0;
518
519 return 0;
520
521 free_reply_data:
522 kfree(reply_data);
523 free_req_info:
524 kfree(req_info);
525
526 return ret;
527 }
528
529 /* default ->done() handler for GET requests */
530 static int ethnl_default_done(struct netlink_callback *cb)
531 {
532 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
533
534 kfree(ctx->reply_data);
535 kfree(ctx->req_info);
536
537 return 0;
538 }
539
540 static const struct ethnl_request_ops *
541 ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
542 [ETHTOOL_MSG_LINKINFO_NTF] = &ethnl_linkinfo_request_ops,
543 [ETHTOOL_MSG_LINKMODES_NTF] = &ethnl_linkmodes_request_ops,
544 [ETHTOOL_MSG_DEBUG_NTF] = &ethnl_debug_request_ops,
545 [ETHTOOL_MSG_WOL_NTF] = &ethnl_wol_request_ops,
546 [ETHTOOL_MSG_FEATURES_NTF] = &ethnl_features_request_ops,
547 [ETHTOOL_MSG_PRIVFLAGS_NTF] = &ethnl_privflags_request_ops,
548 [ETHTOOL_MSG_RINGS_NTF] = &ethnl_rings_request_ops,
549 [ETHTOOL_MSG_CHANNELS_NTF] = &ethnl_channels_request_ops,
550 [ETHTOOL_MSG_COALESCE_NTF] = &ethnl_coalesce_request_ops,
551 [ETHTOOL_MSG_PAUSE_NTF] = &ethnl_pause_request_ops,
552 [ETHTOOL_MSG_EEE_NTF] = &ethnl_eee_request_ops,
553 };
554
555 /* default notification handler */
556 static void ethnl_default_notify(struct net_device *dev, unsigned int cmd,
557 const void *data)
558 {
559 struct ethnl_reply_data *reply_data;
560 const struct ethnl_request_ops *ops;
561 struct ethnl_req_info *req_info;
562 struct sk_buff *skb;
563 void *reply_payload;
564 int reply_len;
565 int ret;
566
567 if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX ||
568 !ethnl_default_notify_ops[cmd],
569 "unexpected notification type %u\n", cmd))
570 return;
571 ops = ethnl_default_notify_ops[cmd];
572 req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
573 if (!req_info)
574 return;
575 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
576 if (!reply_data) {
577 kfree(req_info);
578 return;
579 }
580
581 req_info->dev = dev;
582 req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS;
583
584 ethnl_init_reply_data(reply_data, ops, dev);
585 ret = ops->prepare_data(req_info, reply_data, NULL);
586 if (ret < 0)
587 goto err_cleanup;
588 ret = ops->reply_size(req_info, reply_data);
589 if (ret < 0)
590 goto err_cleanup;
591 reply_len = ret;
592 ret = -ENOMEM;
593 skb = genlmsg_new(reply_len, GFP_KERNEL);
594 if (!skb)
595 goto err_cleanup;
596 reply_payload = ethnl_bcastmsg_put(skb, cmd);
597 if (!reply_payload)
598 goto err_skb;
599 ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr);
600 if (ret < 0)
601 goto err_msg;
602 ret = ops->fill_reply(skb, req_info, reply_data);
603 if (ret < 0)
604 goto err_msg;
605 if (ops->cleanup_data)
606 ops->cleanup_data(reply_data);
607
608 genlmsg_end(skb, reply_payload);
609 kfree(reply_data);
610 kfree(req_info);
611 ethnl_multicast(skb, dev);
612 return;
613
614 err_msg:
615 WARN_ONCE(ret == -EMSGSIZE,
616 "calculated message payload length (%d) not sufficient\n",
617 reply_len);
618 err_skb:
619 nlmsg_free(skb);
620 err_cleanup:
621 if (ops->cleanup_data)
622 ops->cleanup_data(reply_data);
623 kfree(reply_data);
624 kfree(req_info);
625 return;
626 }
627
628 /* notifications */
629
630 typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd,
631 const void *data);
632
633 static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
634 [ETHTOOL_MSG_LINKINFO_NTF] = ethnl_default_notify,
635 [ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify,
636 [ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify,
637 [ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify,
638 [ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify,
639 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify,
640 [ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify,
641 [ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify,
642 [ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify,
643 [ETHTOOL_MSG_PAUSE_NTF] = ethnl_default_notify,
644 [ETHTOOL_MSG_EEE_NTF] = ethnl_default_notify,
645 };
646
647 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
648 {
649 if (unlikely(!ethnl_ok))
650 return;
651 ASSERT_RTNL();
652
653 if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) &&
654 ethnl_notify_handlers[cmd]))
655 ethnl_notify_handlers[cmd](dev, cmd, data);
656 else
657 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n",
658 cmd, netdev_name(dev));
659 }
660 EXPORT_SYMBOL(ethtool_notify);
661
662 static void ethnl_notify_features(struct netdev_notifier_info *info)
663 {
664 struct net_device *dev = netdev_notifier_info_to_dev(info);
665
666 ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL);
667 }
668
669 static int ethnl_netdev_event(struct notifier_block *this, unsigned long event,
670 void *ptr)
671 {
672 switch (event) {
673 case NETDEV_FEAT_CHANGE:
674 ethnl_notify_features(ptr);
675 break;
676 }
677
678 return NOTIFY_DONE;
679 }
680
681 static struct notifier_block ethnl_netdev_notifier = {
682 .notifier_call = ethnl_netdev_event,
683 };
684
685 /* genetlink setup */
686
687 static const struct genl_ops ethtool_genl_ops[] = {
688 {
689 .cmd = ETHTOOL_MSG_STRSET_GET,
690 .doit = ethnl_default_doit,
691 .start = ethnl_default_start,
692 .dumpit = ethnl_default_dumpit,
693 .done = ethnl_default_done,
694 },
695 {
696 .cmd = ETHTOOL_MSG_LINKINFO_GET,
697 .doit = ethnl_default_doit,
698 .start = ethnl_default_start,
699 .dumpit = ethnl_default_dumpit,
700 .done = ethnl_default_done,
701 },
702 {
703 .cmd = ETHTOOL_MSG_LINKINFO_SET,
704 .flags = GENL_UNS_ADMIN_PERM,
705 .doit = ethnl_set_linkinfo,
706 },
707 {
708 .cmd = ETHTOOL_MSG_LINKMODES_GET,
709 .doit = ethnl_default_doit,
710 .start = ethnl_default_start,
711 .dumpit = ethnl_default_dumpit,
712 .done = ethnl_default_done,
713 },
714 {
715 .cmd = ETHTOOL_MSG_LINKMODES_SET,
716 .flags = GENL_UNS_ADMIN_PERM,
717 .doit = ethnl_set_linkmodes,
718 },
719 {
720 .cmd = ETHTOOL_MSG_LINKSTATE_GET,
721 .doit = ethnl_default_doit,
722 .start = ethnl_default_start,
723 .dumpit = ethnl_default_dumpit,
724 .done = ethnl_default_done,
725 },
726 {
727 .cmd = ETHTOOL_MSG_DEBUG_GET,
728 .doit = ethnl_default_doit,
729 .start = ethnl_default_start,
730 .dumpit = ethnl_default_dumpit,
731 .done = ethnl_default_done,
732 },
733 {
734 .cmd = ETHTOOL_MSG_DEBUG_SET,
735 .flags = GENL_UNS_ADMIN_PERM,
736 .doit = ethnl_set_debug,
737 },
738 {
739 .cmd = ETHTOOL_MSG_WOL_GET,
740 .flags = GENL_UNS_ADMIN_PERM,
741 .doit = ethnl_default_doit,
742 .start = ethnl_default_start,
743 .dumpit = ethnl_default_dumpit,
744 .done = ethnl_default_done,
745 },
746 {
747 .cmd = ETHTOOL_MSG_WOL_SET,
748 .flags = GENL_UNS_ADMIN_PERM,
749 .doit = ethnl_set_wol,
750 },
751 {
752 .cmd = ETHTOOL_MSG_FEATURES_GET,
753 .doit = ethnl_default_doit,
754 .start = ethnl_default_start,
755 .dumpit = ethnl_default_dumpit,
756 .done = ethnl_default_done,
757 },
758 {
759 .cmd = ETHTOOL_MSG_FEATURES_SET,
760 .flags = GENL_UNS_ADMIN_PERM,
761 .doit = ethnl_set_features,
762 },
763 {
764 .cmd = ETHTOOL_MSG_PRIVFLAGS_GET,
765 .doit = ethnl_default_doit,
766 .start = ethnl_default_start,
767 .dumpit = ethnl_default_dumpit,
768 .done = ethnl_default_done,
769 },
770 {
771 .cmd = ETHTOOL_MSG_PRIVFLAGS_SET,
772 .flags = GENL_UNS_ADMIN_PERM,
773 .doit = ethnl_set_privflags,
774 },
775 {
776 .cmd = ETHTOOL_MSG_RINGS_GET,
777 .doit = ethnl_default_doit,
778 .start = ethnl_default_start,
779 .dumpit = ethnl_default_dumpit,
780 .done = ethnl_default_done,
781 },
782 {
783 .cmd = ETHTOOL_MSG_RINGS_SET,
784 .flags = GENL_UNS_ADMIN_PERM,
785 .doit = ethnl_set_rings,
786 },
787 {
788 .cmd = ETHTOOL_MSG_CHANNELS_GET,
789 .doit = ethnl_default_doit,
790 .start = ethnl_default_start,
791 .dumpit = ethnl_default_dumpit,
792 .done = ethnl_default_done,
793 },
794 {
795 .cmd = ETHTOOL_MSG_CHANNELS_SET,
796 .flags = GENL_UNS_ADMIN_PERM,
797 .doit = ethnl_set_channels,
798 },
799 {
800 .cmd = ETHTOOL_MSG_COALESCE_GET,
801 .doit = ethnl_default_doit,
802 .start = ethnl_default_start,
803 .dumpit = ethnl_default_dumpit,
804 .done = ethnl_default_done,
805 },
806 {
807 .cmd = ETHTOOL_MSG_COALESCE_SET,
808 .flags = GENL_UNS_ADMIN_PERM,
809 .doit = ethnl_set_coalesce,
810 },
811 {
812 .cmd = ETHTOOL_MSG_PAUSE_GET,
813 .doit = ethnl_default_doit,
814 .start = ethnl_default_start,
815 .dumpit = ethnl_default_dumpit,
816 .done = ethnl_default_done,
817 },
818 {
819 .cmd = ETHTOOL_MSG_PAUSE_SET,
820 .flags = GENL_UNS_ADMIN_PERM,
821 .doit = ethnl_set_pause,
822 },
823 {
824 .cmd = ETHTOOL_MSG_EEE_GET,
825 .doit = ethnl_default_doit,
826 .start = ethnl_default_start,
827 .dumpit = ethnl_default_dumpit,
828 .done = ethnl_default_done,
829 },
830 {
831 .cmd = ETHTOOL_MSG_EEE_SET,
832 .flags = GENL_UNS_ADMIN_PERM,
833 .doit = ethnl_set_eee,
834 },
835 {
836 .cmd = ETHTOOL_MSG_TSINFO_GET,
837 .doit = ethnl_default_doit,
838 .start = ethnl_default_start,
839 .dumpit = ethnl_default_dumpit,
840 .done = ethnl_default_done,
841 },
842 };
843
844 static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
845 [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME },
846 };
847
848 static struct genl_family ethtool_genl_family = {
849 .name = ETHTOOL_GENL_NAME,
850 .version = ETHTOOL_GENL_VERSION,
851 .netnsok = true,
852 .parallel_ops = true,
853 .ops = ethtool_genl_ops,
854 .n_ops = ARRAY_SIZE(ethtool_genl_ops),
855 .mcgrps = ethtool_nl_mcgrps,
856 .n_mcgrps = ARRAY_SIZE(ethtool_nl_mcgrps),
857 };
858
859 /* module setup */
860
861 static int __init ethnl_init(void)
862 {
863 int ret;
864
865 ret = genl_register_family(&ethtool_genl_family);
866 if (WARN(ret < 0, "ethtool: genetlink family registration failed"))
867 return ret;
868 ethnl_ok = true;
869
870 ret = register_netdevice_notifier(&ethnl_netdev_notifier);
871 WARN(ret < 0, "ethtool: net device notifier registration failed");
872 return ret;
873 }
874
875 subsys_initcall(ethnl_init);
Linux with added FPC-III support