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 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 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 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 */ 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 } 314 315 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 } 327 328 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 } 379 380 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