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