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