1 // SPDX-License-Identifier: GPL-2.0-only
2
3 #include "netlink.h"
4 #include "common.h"
5 #include "bitset.h"
6
7 struct linkmodes_req_info {
8 struct ethnl_req_info base;
9 };
10
11 struct linkmodes_reply_data {
12 struct ethnl_reply_data base;
13 struct ethtool_link_ksettings ksettings;
14 struct ethtool_link_settings *lsettings;
15 bool peer_empty;
16 };
17
18 #define LINKMODES_REPDATA(__reply_base) \
19 container_of(__reply_base, struct linkmodes_reply_data, base)
20
21 const struct nla_policy ethnl_linkmodes_get_policy[] = {
22 [ETHTOOL_A_LINKMODES_HEADER] =
23 NLA_POLICY_NESTED(ethnl_header_policy),
24 };
25
linkmodes_prepare_data(const struct ethnl_req_info * req_base,struct ethnl_reply_data * reply_base,struct genl_info * info)26 static int linkmodes_prepare_data(const struct ethnl_req_info *req_base,
27 struct ethnl_reply_data *reply_base,
28 struct genl_info *info)
29 {
30 struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);
31 struct net_device *dev = reply_base->dev;
32 int ret;
33
34 data->lsettings = &data->ksettings.base;
35
36 ret = ethnl_ops_begin(dev);
37 if (ret < 0)
38 return ret;
39
40 ret = __ethtool_get_link_ksettings(dev, &data->ksettings);
41 if (ret < 0 && info) {
42 GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
43 goto out;
44 }
45
46 data->peer_empty =
47 bitmap_empty(data->ksettings.link_modes.lp_advertising,
48 __ETHTOOL_LINK_MODE_MASK_NBITS);
49
50 out:
51 ethnl_ops_complete(dev);
52 return ret;
53 }
54
linkmodes_reply_size(const struct ethnl_req_info * req_base,const struct ethnl_reply_data * reply_base)55 static int linkmodes_reply_size(const struct ethnl_req_info *req_base,
56 const struct ethnl_reply_data *reply_base)
57 {
58 const struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);
59 const struct ethtool_link_ksettings *ksettings = &data->ksettings;
60 const struct ethtool_link_settings *lsettings = &ksettings->base;
61 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
62 int len, ret;
63
64 len = nla_total_size(sizeof(u8)) /* LINKMODES_AUTONEG */
65 + nla_total_size(sizeof(u32)) /* LINKMODES_SPEED */
66 + nla_total_size(sizeof(u8)) /* LINKMODES_DUPLEX */
67 + 0;
68 ret = ethnl_bitset_size(ksettings->link_modes.advertising,
69 ksettings->link_modes.supported,
70 __ETHTOOL_LINK_MODE_MASK_NBITS,
71 link_mode_names, compact);
72 if (ret < 0)
73 return ret;
74 len += ret;
75 if (!data->peer_empty) {
76 ret = ethnl_bitset_size(ksettings->link_modes.lp_advertising,
77 NULL, __ETHTOOL_LINK_MODE_MASK_NBITS,
78 link_mode_names, compact);
79 if (ret < 0)
80 return ret;
81 len += ret;
82 }
83
84 if (lsettings->master_slave_cfg != MASTER_SLAVE_CFG_UNSUPPORTED)
85 len += nla_total_size(sizeof(u8));
86
87 if (lsettings->master_slave_state != MASTER_SLAVE_STATE_UNSUPPORTED)
88 len += nla_total_size(sizeof(u8));
89
90 return len;
91 }
92
linkmodes_fill_reply(struct sk_buff * skb,const struct ethnl_req_info * req_base,const struct ethnl_reply_data * reply_base)93 static int linkmodes_fill_reply(struct sk_buff *skb,
94 const struct ethnl_req_info *req_base,
95 const struct ethnl_reply_data *reply_base)
96 {
97 const struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);
98 const struct ethtool_link_ksettings *ksettings = &data->ksettings;
99 const struct ethtool_link_settings *lsettings = &ksettings->base;
100 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
101 int ret;
102
103 if (nla_put_u8(skb, ETHTOOL_A_LINKMODES_AUTONEG, lsettings->autoneg))
104 return -EMSGSIZE;
105
106 ret = ethnl_put_bitset(skb, ETHTOOL_A_LINKMODES_OURS,
107 ksettings->link_modes.advertising,
108 ksettings->link_modes.supported,
109 __ETHTOOL_LINK_MODE_MASK_NBITS, link_mode_names,
110 compact);
111 if (ret < 0)
112 return -EMSGSIZE;
113 if (!data->peer_empty) {
114 ret = ethnl_put_bitset(skb, ETHTOOL_A_LINKMODES_PEER,
115 ksettings->link_modes.lp_advertising,
116 NULL, __ETHTOOL_LINK_MODE_MASK_NBITS,
117 link_mode_names, compact);
118 if (ret < 0)
119 return -EMSGSIZE;
120 }
121
122 if (nla_put_u32(skb, ETHTOOL_A_LINKMODES_SPEED, lsettings->speed) ||
123 nla_put_u8(skb, ETHTOOL_A_LINKMODES_DUPLEX, lsettings->duplex))
124 return -EMSGSIZE;
125
126 if (lsettings->master_slave_cfg != MASTER_SLAVE_CFG_UNSUPPORTED &&
127 nla_put_u8(skb, ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG,
128 lsettings->master_slave_cfg))
129 return -EMSGSIZE;
130
131 if (lsettings->master_slave_state != MASTER_SLAVE_STATE_UNSUPPORTED &&
132 nla_put_u8(skb, ETHTOOL_A_LINKMODES_MASTER_SLAVE_STATE,
133 lsettings->master_slave_state))
134 return -EMSGSIZE;
135
136 return 0;
137 }
138
139 const struct ethnl_request_ops ethnl_linkmodes_request_ops = {
140 .request_cmd = ETHTOOL_MSG_LINKMODES_GET,
141 .reply_cmd = ETHTOOL_MSG_LINKMODES_GET_REPLY,
142 .hdr_attr = ETHTOOL_A_LINKMODES_HEADER,
143 .req_info_size = sizeof(struct linkmodes_req_info),
144 .reply_data_size = sizeof(struct linkmodes_reply_data),
145
146 .prepare_data = linkmodes_prepare_data,
147 .reply_size = linkmodes_reply_size,
148 .fill_reply = linkmodes_fill_reply,
149 };
150
151 /* LINKMODES_SET */
152
153 struct link_mode_info {
154 int speed;
155 u8 duplex;
156 };
157
158 #define __DEFINE_LINK_MODE_PARAMS(_speed, _type, _duplex) \
159 [ETHTOOL_LINK_MODE(_speed, _type, _duplex)] = { \
160 .speed = SPEED_ ## _speed, \
161 .duplex = __DUPLEX_ ## _duplex \
162 }
163 #define __DUPLEX_Half DUPLEX_HALF
164 #define __DUPLEX_Full DUPLEX_FULL
165 #define __DEFINE_SPECIAL_MODE_PARAMS(_mode) \
166 [ETHTOOL_LINK_MODE_ ## _mode ## _BIT] = { \
167 .speed = SPEED_UNKNOWN, \
168 .duplex = DUPLEX_UNKNOWN, \
169 }
170
171 static const struct link_mode_info link_mode_params[] = {
172 __DEFINE_LINK_MODE_PARAMS(10, T, Half),
173 __DEFINE_LINK_MODE_PARAMS(10, T, Full),
174 __DEFINE_LINK_MODE_PARAMS(100, T, Half),
175 __DEFINE_LINK_MODE_PARAMS(100, T, Full),
176 __DEFINE_LINK_MODE_PARAMS(1000, T, Half),
177 __DEFINE_LINK_MODE_PARAMS(1000, T, Full),
178 __DEFINE_SPECIAL_MODE_PARAMS(Autoneg),
179 __DEFINE_SPECIAL_MODE_PARAMS(TP),
180 __DEFINE_SPECIAL_MODE_PARAMS(AUI),
181 __DEFINE_SPECIAL_MODE_PARAMS(MII),
182 __DEFINE_SPECIAL_MODE_PARAMS(FIBRE),
183 __DEFINE_SPECIAL_MODE_PARAMS(BNC),
184 __DEFINE_LINK_MODE_PARAMS(10000, T, Full),
185 __DEFINE_SPECIAL_MODE_PARAMS(Pause),
186 __DEFINE_SPECIAL_MODE_PARAMS(Asym_Pause),
187 __DEFINE_LINK_MODE_PARAMS(2500, X, Full),
188 __DEFINE_SPECIAL_MODE_PARAMS(Backplane),
189 __DEFINE_LINK_MODE_PARAMS(1000, KX, Full),
190 __DEFINE_LINK_MODE_PARAMS(10000, KX4, Full),
191 __DEFINE_LINK_MODE_PARAMS(10000, KR, Full),
192 [ETHTOOL_LINK_MODE_10000baseR_FEC_BIT] = {
193 .speed = SPEED_10000,
194 .duplex = DUPLEX_FULL,
195 },
196 __DEFINE_LINK_MODE_PARAMS(20000, MLD2, Full),
197 __DEFINE_LINK_MODE_PARAMS(20000, KR2, Full),
198 __DEFINE_LINK_MODE_PARAMS(40000, KR4, Full),
199 __DEFINE_LINK_MODE_PARAMS(40000, CR4, Full),
200 __DEFINE_LINK_MODE_PARAMS(40000, SR4, Full),
201 __DEFINE_LINK_MODE_PARAMS(40000, LR4, Full),
202 __DEFINE_LINK_MODE_PARAMS(56000, KR4, Full),
203 __DEFINE_LINK_MODE_PARAMS(56000, CR4, Full),
204 __DEFINE_LINK_MODE_PARAMS(56000, SR4, Full),
205 __DEFINE_LINK_MODE_PARAMS(56000, LR4, Full),
206 __DEFINE_LINK_MODE_PARAMS(25000, CR, Full),
207 __DEFINE_LINK_MODE_PARAMS(25000, KR, Full),
208 __DEFINE_LINK_MODE_PARAMS(25000, SR, Full),
209 __DEFINE_LINK_MODE_PARAMS(50000, CR2, Full),
210 __DEFINE_LINK_MODE_PARAMS(50000, KR2, Full),
211 __DEFINE_LINK_MODE_PARAMS(100000, KR4, Full),
212 __DEFINE_LINK_MODE_PARAMS(100000, SR4, Full),
213 __DEFINE_LINK_MODE_PARAMS(100000, CR4, Full),
214 __DEFINE_LINK_MODE_PARAMS(100000, LR4_ER4, Full),
215 __DEFINE_LINK_MODE_PARAMS(50000, SR2, Full),
216 __DEFINE_LINK_MODE_PARAMS(1000, X, Full),
217 __DEFINE_LINK_MODE_PARAMS(10000, CR, Full),
218 __DEFINE_LINK_MODE_PARAMS(10000, SR, Full),
219 __DEFINE_LINK_MODE_PARAMS(10000, LR, Full),
220 __DEFINE_LINK_MODE_PARAMS(10000, LRM, Full),
221 __DEFINE_LINK_MODE_PARAMS(10000, ER, Full),
222 __DEFINE_LINK_MODE_PARAMS(2500, T, Full),
223 __DEFINE_LINK_MODE_PARAMS(5000, T, Full),
224 __DEFINE_SPECIAL_MODE_PARAMS(FEC_NONE),
225 __DEFINE_SPECIAL_MODE_PARAMS(FEC_RS),
226 __DEFINE_SPECIAL_MODE_PARAMS(FEC_BASER),
227 __DEFINE_LINK_MODE_PARAMS(50000, KR, Full),
228 __DEFINE_LINK_MODE_PARAMS(50000, SR, Full),
229 __DEFINE_LINK_MODE_PARAMS(50000, CR, Full),
230 __DEFINE_LINK_MODE_PARAMS(50000, LR_ER_FR, Full),
231 __DEFINE_LINK_MODE_PARAMS(50000, DR, Full),
232 __DEFINE_LINK_MODE_PARAMS(100000, KR2, Full),
233 __DEFINE_LINK_MODE_PARAMS(100000, SR2, Full),
234 __DEFINE_LINK_MODE_PARAMS(100000, CR2, Full),
235 __DEFINE_LINK_MODE_PARAMS(100000, LR2_ER2_FR2, Full),
236 __DEFINE_LINK_MODE_PARAMS(100000, DR2, Full),
237 __DEFINE_LINK_MODE_PARAMS(200000, KR4, Full),
238 __DEFINE_LINK_MODE_PARAMS(200000, SR4, Full),
239 __DEFINE_LINK_MODE_PARAMS(200000, LR4_ER4_FR4, Full),
240 __DEFINE_LINK_MODE_PARAMS(200000, DR4, Full),
241 __DEFINE_LINK_MODE_PARAMS(200000, CR4, Full),
242 __DEFINE_LINK_MODE_PARAMS(100, T1, Full),
243 __DEFINE_LINK_MODE_PARAMS(1000, T1, Full),
244 __DEFINE_LINK_MODE_PARAMS(400000, KR8, Full),
245 __DEFINE_LINK_MODE_PARAMS(400000, SR8, Full),
246 __DEFINE_LINK_MODE_PARAMS(400000, LR8_ER8_FR8, Full),
247 __DEFINE_LINK_MODE_PARAMS(400000, DR8, Full),
248 __DEFINE_LINK_MODE_PARAMS(400000, CR8, Full),
249 __DEFINE_SPECIAL_MODE_PARAMS(FEC_LLRS),
250 __DEFINE_LINK_MODE_PARAMS(100000, KR, Full),
251 __DEFINE_LINK_MODE_PARAMS(100000, SR, Full),
252 __DEFINE_LINK_MODE_PARAMS(100000, LR_ER_FR, Full),
253 __DEFINE_LINK_MODE_PARAMS(100000, DR, Full),
254 __DEFINE_LINK_MODE_PARAMS(100000, CR, Full),
255 __DEFINE_LINK_MODE_PARAMS(200000, KR2, Full),
256 __DEFINE_LINK_MODE_PARAMS(200000, SR2, Full),
257 __DEFINE_LINK_MODE_PARAMS(200000, LR2_ER2_FR2, Full),
258 __DEFINE_LINK_MODE_PARAMS(200000, DR2, Full),
259 __DEFINE_LINK_MODE_PARAMS(200000, CR2, Full),
260 __DEFINE_LINK_MODE_PARAMS(400000, KR4, Full),
261 __DEFINE_LINK_MODE_PARAMS(400000, SR4, Full),
262 __DEFINE_LINK_MODE_PARAMS(400000, LR4_ER4_FR4, Full),
263 __DEFINE_LINK_MODE_PARAMS(400000, DR4, Full),
264 __DEFINE_LINK_MODE_PARAMS(400000, CR4, Full),
265 __DEFINE_LINK_MODE_PARAMS(100, FX, Half),
266 __DEFINE_LINK_MODE_PARAMS(100, FX, Full),
267 };
268
269 const struct nla_policy ethnl_linkmodes_set_policy[] = {
270 [ETHTOOL_A_LINKMODES_HEADER] =
271 NLA_POLICY_NESTED(ethnl_header_policy),
272 [ETHTOOL_A_LINKMODES_AUTONEG] = { .type = NLA_U8 },
273 [ETHTOOL_A_LINKMODES_OURS] = { .type = NLA_NESTED },
274 [ETHTOOL_A_LINKMODES_SPEED] = { .type = NLA_U32 },
275 [ETHTOOL_A_LINKMODES_DUPLEX] = { .type = NLA_U8 },
276 [ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG] = { .type = NLA_U8 },
277 };
278
279 /* Set advertised link modes to all supported modes matching requested speed
280 * and duplex values. Called when autonegotiation is on, speed or duplex is
281 * requested but no link mode change. This is done in userspace with ioctl()
282 * interface, move it into kernel for netlink.
283 * Returns true if advertised modes bitmap was modified.
284 */
ethnl_auto_linkmodes(struct ethtool_link_ksettings * ksettings,bool req_speed,bool req_duplex)285 static bool ethnl_auto_linkmodes(struct ethtool_link_ksettings *ksettings,
286 bool req_speed, bool req_duplex)
287 {
288 unsigned long *advertising = ksettings->link_modes.advertising;
289 unsigned long *supported = ksettings->link_modes.supported;
290 DECLARE_BITMAP(old_adv, __ETHTOOL_LINK_MODE_MASK_NBITS);
291 unsigned int i;
292
293 BUILD_BUG_ON(ARRAY_SIZE(link_mode_params) !=
294 __ETHTOOL_LINK_MODE_MASK_NBITS);
295
296 bitmap_copy(old_adv, advertising, __ETHTOOL_LINK_MODE_MASK_NBITS);
297
298 for (i = 0; i < __ETHTOOL_LINK_MODE_MASK_NBITS; i++) {
299 const struct link_mode_info *info = &link_mode_params[i];
300
301 if (info->speed == SPEED_UNKNOWN)
302 continue;
303 if (test_bit(i, supported) &&
304 (!req_speed || info->speed == ksettings->base.speed) &&
305 (!req_duplex || info->duplex == ksettings->base.duplex))
306 set_bit(i, advertising);
307 else
308 clear_bit(i, advertising);
309 }
310
311 return !bitmap_equal(old_adv, advertising,
312 __ETHTOOL_LINK_MODE_MASK_NBITS);
313 }
314
ethnl_validate_master_slave_cfg(u8 cfg)315 static bool ethnl_validate_master_slave_cfg(u8 cfg)
316 {
317 switch (cfg) {
318 case MASTER_SLAVE_CFG_MASTER_PREFERRED:
319 case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
320 case MASTER_SLAVE_CFG_MASTER_FORCE:
321 case MASTER_SLAVE_CFG_SLAVE_FORCE:
322 return true;
323 }
324
325 return false;
326 }
327
ethnl_update_linkmodes(struct genl_info * info,struct nlattr ** tb,struct ethtool_link_ksettings * ksettings,bool * mod)328 static int ethnl_update_linkmodes(struct genl_info *info, struct nlattr **tb,
329 struct ethtool_link_ksettings *ksettings,
330 bool *mod)
331 {
332 struct ethtool_link_settings *lsettings = &ksettings->base;
333 bool req_speed, req_duplex;
334 const struct nlattr *master_slave_cfg;
335 int ret;
336
337 master_slave_cfg = tb[ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG];
338 if (master_slave_cfg) {
339 u8 cfg = nla_get_u8(master_slave_cfg);
340
341 if (lsettings->master_slave_cfg == MASTER_SLAVE_CFG_UNSUPPORTED) {
342 NL_SET_ERR_MSG_ATTR(info->extack, master_slave_cfg,
343 "master/slave configuration not supported by device");
344 return -EOPNOTSUPP;
345 }
346
347 if (!ethnl_validate_master_slave_cfg(cfg)) {
348 NL_SET_ERR_MSG_ATTR(info->extack, master_slave_cfg,
349 "master/slave value is invalid");
350 return -EOPNOTSUPP;
351 }
352 }
353
354 *mod = false;
355 req_speed = tb[ETHTOOL_A_LINKMODES_SPEED];
356 req_duplex = tb[ETHTOOL_A_LINKMODES_DUPLEX];
357
358 ethnl_update_u8(&lsettings->autoneg, tb[ETHTOOL_A_LINKMODES_AUTONEG],
359 mod);
360 ret = ethnl_update_bitset(ksettings->link_modes.advertising,
361 __ETHTOOL_LINK_MODE_MASK_NBITS,
362 tb[ETHTOOL_A_LINKMODES_OURS], link_mode_names,
363 info->extack, mod);
364 if (ret < 0)
365 return ret;
366 ethnl_update_u32(&lsettings->speed, tb[ETHTOOL_A_LINKMODES_SPEED],
367 mod);
368 ethnl_update_u8(&lsettings->duplex, tb[ETHTOOL_A_LINKMODES_DUPLEX],
369 mod);
370 ethnl_update_u8(&lsettings->master_slave_cfg, master_slave_cfg, mod);
371
372 if (!tb[ETHTOOL_A_LINKMODES_OURS] && lsettings->autoneg &&
373 (req_speed || req_duplex) &&
374 ethnl_auto_linkmodes(ksettings, req_speed, req_duplex))
375 *mod = true;
376
377 return 0;
378 }
379
ethnl_set_linkmodes(struct sk_buff * skb,struct genl_info * info)380 int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info)
381 {
382 struct ethtool_link_ksettings ksettings = {};
383 struct ethnl_req_info req_info = {};
384 struct nlattr **tb = info->attrs;
385 struct net_device *dev;
386 bool mod = false;
387 int ret;
388
389 ret = ethnl_parse_header_dev_get(&req_info,
390 tb[ETHTOOL_A_LINKMODES_HEADER],
391 genl_info_net(info), info->extack,
392 true);
393 if (ret < 0)
394 return ret;
395 dev = req_info.dev;
396 ret = -EOPNOTSUPP;
397 if (!dev->ethtool_ops->get_link_ksettings ||
398 !dev->ethtool_ops->set_link_ksettings)
399 goto out_dev;
400
401 rtnl_lock();
402 ret = ethnl_ops_begin(dev);
403 if (ret < 0)
404 goto out_rtnl;
405
406 ret = __ethtool_get_link_ksettings(dev, &ksettings);
407 if (ret < 0) {
408 GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
409 goto out_ops;
410 }
411
412 ret = ethnl_update_linkmodes(info, tb, &ksettings, &mod);
413 if (ret < 0)
414 goto out_ops;
415
416 if (mod) {
417 ret = dev->ethtool_ops->set_link_ksettings(dev, &ksettings);
418 if (ret < 0)
419 GENL_SET_ERR_MSG(info, "link settings update failed");
420 else
421 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
422 }
423
424 out_ops:
425 ethnl_ops_complete(dev);
426 out_rtnl:
427 rtnl_unlock();
428 out_dev:
429 dev_put(dev);
430 return ret;
431 }
432
