1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ 2 /* Copyright (c) 2018 Mellanox Technologies. */ 3 4 #include <net/inet_ecn.h> 5 #include <net/vxlan.h> 6 #include <net/gre.h> 7 #include <net/geneve.h> 8 #include <net/bareudp.h> 9 #include "en/tc_tun.h" 10 #include "en/tc_priv.h" 11 #include "en_tc.h" 12 #include "rep/tc.h" 13 #include "rep/neigh.h" 14 #include "lag/lag.h" 15 #include "lag/mp.h" 16 17 struct mlx5e_tc_tun_route_attr { 18 struct net_device *out_dev; 19 struct net_device *route_dev; 20 union { 21 struct flowi4 fl4; 22 struct flowi6 fl6; 23 } fl; 24 struct neighbour *n; 25 u8 ttl; 26 }; 27 28 #define TC_TUN_ROUTE_ATTR_INIT(name) struct mlx5e_tc_tun_route_attr name = {} 29 30 static void mlx5e_tc_tun_route_attr_cleanup(struct mlx5e_tc_tun_route_attr *attr) 31 { 32 if (attr->n) 33 neigh_release(attr->n); 34 if (attr->route_dev) 35 dev_put(attr->route_dev); 36 } 37 38 struct mlx5e_tc_tunnel *mlx5e_get_tc_tun(struct net_device *tunnel_dev) 39 { 40 if (netif_is_vxlan(tunnel_dev)) 41 return &vxlan_tunnel; 42 else if (netif_is_geneve(tunnel_dev)) 43 return &geneve_tunnel; 44 else if (netif_is_gretap(tunnel_dev) || 45 netif_is_ip6gretap(tunnel_dev)) 46 return &gre_tunnel; 47 else if (netif_is_bareudp(tunnel_dev)) 48 return &mplsoudp_tunnel; 49 else 50 return NULL; 51 } 52 53 static int get_route_and_out_devs(struct mlx5e_priv *priv, 54 struct net_device *dev, 55 struct net_device **route_dev, 56 struct net_device **out_dev) 57 { 58 struct net_device *uplink_dev, *uplink_upper, *real_dev; 59 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 60 bool dst_is_lag_dev; 61 62 real_dev = is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : dev; 63 uplink_dev = mlx5_eswitch_uplink_get_proto_dev(esw, REP_ETH); 64 65 rcu_read_lock(); 66 uplink_upper = netdev_master_upper_dev_get_rcu(uplink_dev); 67 /* mlx5_lag_is_sriov() is a blocking function which can't be called 68 * while holding rcu read lock. Take the net_device for correctness 69 * sake. 70 */ 71 if (uplink_upper) 72 dev_hold(uplink_upper); 73 rcu_read_unlock(); 74 75 dst_is_lag_dev = (uplink_upper && 76 netif_is_lag_master(uplink_upper) && 77 real_dev == uplink_upper && 78 mlx5_lag_is_sriov(priv->mdev)); 79 if (uplink_upper) 80 dev_put(uplink_upper); 81 82 /* if the egress device isn't on the same HW e-switch or 83 * it's a LAG device, use the uplink 84 */ 85 *route_dev = dev; 86 if (!netdev_port_same_parent_id(priv->netdev, real_dev) || 87 dst_is_lag_dev || is_vlan_dev(*route_dev) || 88 netif_is_ovs_master(*route_dev)) 89 *out_dev = uplink_dev; 90 else if (mlx5e_eswitch_rep(dev) && 91 mlx5e_is_valid_eswitch_fwd_dev(priv, dev)) 92 *out_dev = *route_dev; 93 else 94 return -EOPNOTSUPP; 95 96 if (!mlx5e_eswitch_uplink_rep(*out_dev)) 97 return -EOPNOTSUPP; 98 99 if (mlx5e_eswitch_uplink_rep(priv->netdev) && *out_dev != priv->netdev && 100 !mlx5_lag_is_mpesw(priv->mdev)) 101 return -EOPNOTSUPP; 102 103 return 0; 104 } 105 106 static int mlx5e_route_lookup_ipv4_get(struct mlx5e_priv *priv, 107 struct net_device *dev, 108 struct mlx5e_tc_tun_route_attr *attr) 109 { 110 struct net_device *route_dev; 111 struct net_device *out_dev; 112 struct neighbour *n; 113 struct rtable *rt; 114 115 #if IS_ENABLED(CONFIG_INET) 116 struct mlx5_core_dev *mdev = priv->mdev; 117 struct net_device *uplink_dev; 118 int ret; 119 120 if (mlx5_lag_is_multipath(mdev)) { 121 struct mlx5_eswitch *esw = mdev->priv.eswitch; 122 123 uplink_dev = mlx5_eswitch_uplink_get_proto_dev(esw, REP_ETH); 124 attr->fl.fl4.flowi4_oif = uplink_dev->ifindex; 125 } else { 126 struct mlx5e_tc_tunnel *tunnel = mlx5e_get_tc_tun(dev); 127 128 if (tunnel && tunnel->get_remote_ifindex) 129 attr->fl.fl4.flowi4_oif = tunnel->get_remote_ifindex(dev); 130 } 131 132 rt = ip_route_output_key(dev_net(dev), &attr->fl.fl4); 133 if (IS_ERR(rt)) 134 return PTR_ERR(rt); 135 136 if (rt->rt_type != RTN_UNICAST) { 137 ret = -ENETUNREACH; 138 goto err_rt_release; 139 } 140 141 if (mlx5_lag_is_multipath(mdev) && rt->rt_gw_family != AF_INET) { 142 ret = -ENETUNREACH; 143 goto err_rt_release; 144 } 145 #else 146 return -EOPNOTSUPP; 147 #endif 148 149 ret = get_route_and_out_devs(priv, rt->dst.dev, &route_dev, &out_dev); 150 if (ret < 0) 151 goto err_rt_release; 152 dev_hold(route_dev); 153 154 if (!attr->ttl) 155 attr->ttl = ip4_dst_hoplimit(&rt->dst); 156 n = dst_neigh_lookup(&rt->dst, &attr->fl.fl4.daddr); 157 if (!n) { 158 ret = -ENOMEM; 159 goto err_dev_release; 160 } 161 162 ip_rt_put(rt); 163 attr->route_dev = route_dev; 164 attr->out_dev = out_dev; 165 attr->n = n; 166 return 0; 167 168 err_dev_release: 169 dev_put(route_dev); 170 err_rt_release: 171 ip_rt_put(rt); 172 return ret; 173 } 174 175 static void mlx5e_route_lookup_ipv4_put(struct mlx5e_tc_tun_route_attr *attr) 176 { 177 mlx5e_tc_tun_route_attr_cleanup(attr); 178 } 179 180 static const char *mlx5e_netdev_kind(struct net_device *dev) 181 { 182 if (dev->rtnl_link_ops) 183 return dev->rtnl_link_ops->kind; 184 else 185 return "unknown"; 186 } 187 188 static int mlx5e_gen_ip_tunnel_header(char buf[], __u8 *ip_proto, 189 struct mlx5e_encap_entry *e) 190 { 191 if (!e->tunnel) { 192 pr_warn("mlx5: Cannot generate tunnel header for this tunnel\n"); 193 return -EOPNOTSUPP; 194 } 195 196 return e->tunnel->generate_ip_tun_hdr(buf, ip_proto, e); 197 } 198 199 static char *gen_eth_tnl_hdr(char *buf, struct net_device *dev, 200 struct mlx5e_encap_entry *e, 201 u16 proto) 202 { 203 struct ethhdr *eth = (struct ethhdr *)buf; 204 char *ip; 205 206 ether_addr_copy(eth->h_dest, e->h_dest); 207 ether_addr_copy(eth->h_source, dev->dev_addr); 208 if (is_vlan_dev(dev)) { 209 struct vlan_hdr *vlan = (struct vlan_hdr *) 210 ((char *)eth + ETH_HLEN); 211 ip = (char *)vlan + VLAN_HLEN; 212 eth->h_proto = vlan_dev_vlan_proto(dev); 213 vlan->h_vlan_TCI = htons(vlan_dev_vlan_id(dev)); 214 vlan->h_vlan_encapsulated_proto = htons(proto); 215 } else { 216 eth->h_proto = htons(proto); 217 ip = (char *)eth + ETH_HLEN; 218 } 219 220 return ip; 221 } 222 223 int mlx5e_tc_tun_create_header_ipv4(struct mlx5e_priv *priv, 224 struct net_device *mirred_dev, 225 struct mlx5e_encap_entry *e) 226 { 227 int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size); 228 const struct ip_tunnel_key *tun_key = &e->tun_info->key; 229 struct mlx5_pkt_reformat_params reformat_params; 230 struct mlx5e_neigh m_neigh = {}; 231 TC_TUN_ROUTE_ATTR_INIT(attr); 232 int ipv4_encap_size; 233 char *encap_header; 234 struct iphdr *ip; 235 u8 nud_state; 236 int err; 237 238 /* add the IP fields */ 239 attr.fl.fl4.flowi4_tos = tun_key->tos & ~INET_ECN_MASK; 240 attr.fl.fl4.daddr = tun_key->u.ipv4.dst; 241 attr.fl.fl4.saddr = tun_key->u.ipv4.src; 242 attr.ttl = tun_key->ttl; 243 244 err = mlx5e_route_lookup_ipv4_get(priv, mirred_dev, &attr); 245 if (err) 246 return err; 247 248 ipv4_encap_size = 249 (is_vlan_dev(attr.route_dev) ? VLAN_ETH_HLEN : ETH_HLEN) + 250 sizeof(struct iphdr) + 251 e->tunnel->calc_hlen(e); 252 253 if (max_encap_size < ipv4_encap_size) { 254 mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n", 255 ipv4_encap_size, max_encap_size); 256 err = -EOPNOTSUPP; 257 goto release_neigh; 258 } 259 260 encap_header = kzalloc(ipv4_encap_size, GFP_KERNEL); 261 if (!encap_header) { 262 err = -ENOMEM; 263 goto release_neigh; 264 } 265 266 m_neigh.family = attr.n->ops->family; 267 memcpy(&m_neigh.dst_ip, attr.n->primary_key, attr.n->tbl->key_len); 268 e->out_dev = attr.out_dev; 269 e->route_dev_ifindex = attr.route_dev->ifindex; 270 271 /* It's important to add the neigh to the hash table before checking 272 * the neigh validity state. So if we'll get a notification, in case the 273 * neigh changes it's validity state, we would find the relevant neigh 274 * in the hash. 275 */ 276 err = mlx5e_rep_encap_entry_attach(netdev_priv(attr.out_dev), e, &m_neigh, attr.n->dev); 277 if (err) 278 goto free_encap; 279 280 read_lock_bh(&attr.n->lock); 281 nud_state = attr.n->nud_state; 282 ether_addr_copy(e->h_dest, attr.n->ha); 283 read_unlock_bh(&attr.n->lock); 284 285 /* add ethernet header */ 286 ip = (struct iphdr *)gen_eth_tnl_hdr(encap_header, attr.route_dev, e, 287 ETH_P_IP); 288 289 /* add ip header */ 290 ip->tos = tun_key->tos; 291 ip->version = 0x4; 292 ip->ihl = 0x5; 293 ip->ttl = attr.ttl; 294 ip->daddr = attr.fl.fl4.daddr; 295 ip->saddr = attr.fl.fl4.saddr; 296 297 /* add tunneling protocol header */ 298 err = mlx5e_gen_ip_tunnel_header((char *)ip + sizeof(struct iphdr), 299 &ip->protocol, e); 300 if (err) 301 goto destroy_neigh_entry; 302 303 e->encap_size = ipv4_encap_size; 304 e->encap_header = encap_header; 305 306 if (!(nud_state & NUD_VALID)) { 307 neigh_event_send(attr.n, NULL); 308 /* the encap entry will be made valid on neigh update event 309 * and not used before that. 310 */ 311 goto release_neigh; 312 } 313 314 memset(&reformat_params, 0, sizeof(reformat_params)); 315 reformat_params.type = e->reformat_type; 316 reformat_params.size = ipv4_encap_size; 317 reformat_params.data = encap_header; 318 e->pkt_reformat = mlx5_packet_reformat_alloc(priv->mdev, &reformat_params, 319 MLX5_FLOW_NAMESPACE_FDB); 320 if (IS_ERR(e->pkt_reformat)) { 321 err = PTR_ERR(e->pkt_reformat); 322 goto destroy_neigh_entry; 323 } 324 325 e->flags |= MLX5_ENCAP_ENTRY_VALID; 326 mlx5e_rep_queue_neigh_stats_work(netdev_priv(attr.out_dev)); 327 mlx5e_route_lookup_ipv4_put(&attr); 328 return err; 329 330 destroy_neigh_entry: 331 mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e); 332 free_encap: 333 kfree(encap_header); 334 release_neigh: 335 mlx5e_route_lookup_ipv4_put(&attr); 336 return err; 337 } 338 339 int mlx5e_tc_tun_update_header_ipv4(struct mlx5e_priv *priv, 340 struct net_device *mirred_dev, 341 struct mlx5e_encap_entry *e) 342 { 343 int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size); 344 const struct ip_tunnel_key *tun_key = &e->tun_info->key; 345 struct mlx5_pkt_reformat_params reformat_params; 346 TC_TUN_ROUTE_ATTR_INIT(attr); 347 int ipv4_encap_size; 348 char *encap_header; 349 struct iphdr *ip; 350 u8 nud_state; 351 int err; 352 353 /* add the IP fields */ 354 attr.fl.fl4.flowi4_tos = tun_key->tos & ~INET_ECN_MASK; 355 attr.fl.fl4.daddr = tun_key->u.ipv4.dst; 356 attr.fl.fl4.saddr = tun_key->u.ipv4.src; 357 attr.ttl = tun_key->ttl; 358 359 err = mlx5e_route_lookup_ipv4_get(priv, mirred_dev, &attr); 360 if (err) 361 return err; 362 363 ipv4_encap_size = 364 (is_vlan_dev(attr.route_dev) ? VLAN_ETH_HLEN : ETH_HLEN) + 365 sizeof(struct iphdr) + 366 e->tunnel->calc_hlen(e); 367 368 if (max_encap_size < ipv4_encap_size) { 369 mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n", 370 ipv4_encap_size, max_encap_size); 371 err = -EOPNOTSUPP; 372 goto release_neigh; 373 } 374 375 encap_header = kzalloc(ipv4_encap_size, GFP_KERNEL); 376 if (!encap_header) { 377 err = -ENOMEM; 378 goto release_neigh; 379 } 380 381 e->route_dev_ifindex = attr.route_dev->ifindex; 382 383 read_lock_bh(&attr.n->lock); 384 nud_state = attr.n->nud_state; 385 ether_addr_copy(e->h_dest, attr.n->ha); 386 WRITE_ONCE(e->nhe->neigh_dev, attr.n->dev); 387 read_unlock_bh(&attr.n->lock); 388 389 /* add ethernet header */ 390 ip = (struct iphdr *)gen_eth_tnl_hdr(encap_header, attr.route_dev, e, 391 ETH_P_IP); 392 393 /* add ip header */ 394 ip->tos = tun_key->tos; 395 ip->version = 0x4; 396 ip->ihl = 0x5; 397 ip->ttl = attr.ttl; 398 ip->daddr = attr.fl.fl4.daddr; 399 ip->saddr = attr.fl.fl4.saddr; 400 401 /* add tunneling protocol header */ 402 err = mlx5e_gen_ip_tunnel_header((char *)ip + sizeof(struct iphdr), 403 &ip->protocol, e); 404 if (err) 405 goto free_encap; 406 407 e->encap_size = ipv4_encap_size; 408 kfree(e->encap_header); 409 e->encap_header = encap_header; 410 411 if (!(nud_state & NUD_VALID)) { 412 neigh_event_send(attr.n, NULL); 413 /* the encap entry will be made valid on neigh update event 414 * and not used before that. 415 */ 416 goto release_neigh; 417 } 418 419 memset(&reformat_params, 0, sizeof(reformat_params)); 420 reformat_params.type = e->reformat_type; 421 reformat_params.size = ipv4_encap_size; 422 reformat_params.data = encap_header; 423 e->pkt_reformat = mlx5_packet_reformat_alloc(priv->mdev, &reformat_params, 424 MLX5_FLOW_NAMESPACE_FDB); 425 if (IS_ERR(e->pkt_reformat)) { 426 err = PTR_ERR(e->pkt_reformat); 427 goto free_encap; 428 } 429 430 e->flags |= MLX5_ENCAP_ENTRY_VALID; 431 mlx5e_rep_queue_neigh_stats_work(netdev_priv(attr.out_dev)); 432 mlx5e_route_lookup_ipv4_put(&attr); 433 return err; 434 435 free_encap: 436 kfree(encap_header); 437 release_neigh: 438 mlx5e_route_lookup_ipv4_put(&attr); 439 return err; 440 } 441 442 #if IS_ENABLED(CONFIG_INET) && IS_ENABLED(CONFIG_IPV6) 443 static int mlx5e_route_lookup_ipv6_get(struct mlx5e_priv *priv, 444 struct net_device *dev, 445 struct mlx5e_tc_tun_route_attr *attr) 446 { 447 struct mlx5e_tc_tunnel *tunnel = mlx5e_get_tc_tun(dev); 448 struct net_device *route_dev; 449 struct net_device *out_dev; 450 struct dst_entry *dst; 451 struct neighbour *n; 452 int ret; 453 454 if (tunnel && tunnel->get_remote_ifindex) 455 attr->fl.fl6.flowi6_oif = tunnel->get_remote_ifindex(dev); 456 dst = ipv6_stub->ipv6_dst_lookup_flow(dev_net(dev), NULL, &attr->fl.fl6, 457 NULL); 458 if (IS_ERR(dst)) 459 return PTR_ERR(dst); 460 461 if (!attr->ttl) 462 attr->ttl = ip6_dst_hoplimit(dst); 463 464 ret = get_route_and_out_devs(priv, dst->dev, &route_dev, &out_dev); 465 if (ret < 0) 466 goto err_dst_release; 467 468 dev_hold(route_dev); 469 n = dst_neigh_lookup(dst, &attr->fl.fl6.daddr); 470 if (!n) { 471 ret = -ENOMEM; 472 goto err_dev_release; 473 } 474 475 dst_release(dst); 476 attr->out_dev = out_dev; 477 attr->route_dev = route_dev; 478 attr->n = n; 479 return 0; 480 481 err_dev_release: 482 dev_put(route_dev); 483 err_dst_release: 484 dst_release(dst); 485 return ret; 486 } 487 488 static void mlx5e_route_lookup_ipv6_put(struct mlx5e_tc_tun_route_attr *attr) 489 { 490 mlx5e_tc_tun_route_attr_cleanup(attr); 491 } 492 493 int mlx5e_tc_tun_create_header_ipv6(struct mlx5e_priv *priv, 494 struct net_device *mirred_dev, 495 struct mlx5e_encap_entry *e) 496 { 497 int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size); 498 const struct ip_tunnel_key *tun_key = &e->tun_info->key; 499 struct mlx5_pkt_reformat_params reformat_params; 500 struct mlx5e_neigh m_neigh = {}; 501 TC_TUN_ROUTE_ATTR_INIT(attr); 502 struct ipv6hdr *ip6h; 503 int ipv6_encap_size; 504 char *encap_header; 505 u8 nud_state; 506 int err; 507 508 attr.ttl = tun_key->ttl; 509 attr.fl.fl6.flowlabel = ip6_make_flowinfo(tun_key->tos, tun_key->label); 510 attr.fl.fl6.daddr = tun_key->u.ipv6.dst; 511 attr.fl.fl6.saddr = tun_key->u.ipv6.src; 512 513 err = mlx5e_route_lookup_ipv6_get(priv, mirred_dev, &attr); 514 if (err) 515 return err; 516 517 ipv6_encap_size = 518 (is_vlan_dev(attr.route_dev) ? VLAN_ETH_HLEN : ETH_HLEN) + 519 sizeof(struct ipv6hdr) + 520 e->tunnel->calc_hlen(e); 521 522 if (max_encap_size < ipv6_encap_size) { 523 mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n", 524 ipv6_encap_size, max_encap_size); 525 err = -EOPNOTSUPP; 526 goto release_neigh; 527 } 528 529 encap_header = kzalloc(ipv6_encap_size, GFP_KERNEL); 530 if (!encap_header) { 531 err = -ENOMEM; 532 goto release_neigh; 533 } 534 535 m_neigh.family = attr.n->ops->family; 536 memcpy(&m_neigh.dst_ip, attr.n->primary_key, attr.n->tbl->key_len); 537 e->out_dev = attr.out_dev; 538 e->route_dev_ifindex = attr.route_dev->ifindex; 539 540 /* It's important to add the neigh to the hash table before checking 541 * the neigh validity state. So if we'll get a notification, in case the 542 * neigh changes it's validity state, we would find the relevant neigh 543 * in the hash. 544 */ 545 err = mlx5e_rep_encap_entry_attach(netdev_priv(attr.out_dev), e, &m_neigh, attr.n->dev); 546 if (err) 547 goto free_encap; 548 549 read_lock_bh(&attr.n->lock); 550 nud_state = attr.n->nud_state; 551 ether_addr_copy(e->h_dest, attr.n->ha); 552 read_unlock_bh(&attr.n->lock); 553 554 /* add ethernet header */ 555 ip6h = (struct ipv6hdr *)gen_eth_tnl_hdr(encap_header, attr.route_dev, e, 556 ETH_P_IPV6); 557 558 /* add ip header */ 559 ip6_flow_hdr(ip6h, tun_key->tos, 0); 560 /* the HW fills up ipv6 payload len */ 561 ip6h->hop_limit = attr.ttl; 562 ip6h->daddr = attr.fl.fl6.daddr; 563 ip6h->saddr = attr.fl.fl6.saddr; 564 565 /* add tunneling protocol header */ 566 err = mlx5e_gen_ip_tunnel_header((char *)ip6h + sizeof(struct ipv6hdr), 567 &ip6h->nexthdr, e); 568 if (err) 569 goto destroy_neigh_entry; 570 571 e->encap_size = ipv6_encap_size; 572 e->encap_header = encap_header; 573 574 if (!(nud_state & NUD_VALID)) { 575 neigh_event_send(attr.n, NULL); 576 /* the encap entry will be made valid on neigh update event 577 * and not used before that. 578 */ 579 goto release_neigh; 580 } 581 582 memset(&reformat_params, 0, sizeof(reformat_params)); 583 reformat_params.type = e->reformat_type; 584 reformat_params.size = ipv6_encap_size; 585 reformat_params.data = encap_header; 586 e->pkt_reformat = mlx5_packet_reformat_alloc(priv->mdev, &reformat_params, 587 MLX5_FLOW_NAMESPACE_FDB); 588 if (IS_ERR(e->pkt_reformat)) { 589 err = PTR_ERR(e->pkt_reformat); 590 goto destroy_neigh_entry; 591 } 592 593 e->flags |= MLX5_ENCAP_ENTRY_VALID; 594 mlx5e_rep_queue_neigh_stats_work(netdev_priv(attr.out_dev)); 595 mlx5e_route_lookup_ipv6_put(&attr); 596 return err; 597 598 destroy_neigh_entry: 599 mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e); 600 free_encap: 601 kfree(encap_header); 602 release_neigh: 603 mlx5e_route_lookup_ipv6_put(&attr); 604 return err; 605 } 606 607 int mlx5e_tc_tun_update_header_ipv6(struct mlx5e_priv *priv, 608 struct net_device *mirred_dev, 609 struct mlx5e_encap_entry *e) 610 { 611 int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size); 612 const struct ip_tunnel_key *tun_key = &e->tun_info->key; 613 struct mlx5_pkt_reformat_params reformat_params; 614 TC_TUN_ROUTE_ATTR_INIT(attr); 615 struct ipv6hdr *ip6h; 616 int ipv6_encap_size; 617 char *encap_header; 618 u8 nud_state; 619 int err; 620 621 attr.ttl = tun_key->ttl; 622 623 attr.fl.fl6.flowlabel = ip6_make_flowinfo(tun_key->tos, tun_key->label); 624 attr.fl.fl6.daddr = tun_key->u.ipv6.dst; 625 attr.fl.fl6.saddr = tun_key->u.ipv6.src; 626 627 err = mlx5e_route_lookup_ipv6_get(priv, mirred_dev, &attr); 628 if (err) 629 return err; 630 631 ipv6_encap_size = 632 (is_vlan_dev(attr.route_dev) ? VLAN_ETH_HLEN : ETH_HLEN) + 633 sizeof(struct ipv6hdr) + 634 e->tunnel->calc_hlen(e); 635 636 if (max_encap_size < ipv6_encap_size) { 637 mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n", 638 ipv6_encap_size, max_encap_size); 639 err = -EOPNOTSUPP; 640 goto release_neigh; 641 } 642 643 encap_header = kzalloc(ipv6_encap_size, GFP_KERNEL); 644 if (!encap_header) { 645 err = -ENOMEM; 646 goto release_neigh; 647 } 648 649 e->route_dev_ifindex = attr.route_dev->ifindex; 650 651 read_lock_bh(&attr.n->lock); 652 nud_state = attr.n->nud_state; 653 ether_addr_copy(e->h_dest, attr.n->ha); 654 WRITE_ONCE(e->nhe->neigh_dev, attr.n->dev); 655 read_unlock_bh(&attr.n->lock); 656 657 /* add ethernet header */ 658 ip6h = (struct ipv6hdr *)gen_eth_tnl_hdr(encap_header, attr.route_dev, e, 659 ETH_P_IPV6); 660 661 /* add ip header */ 662 ip6_flow_hdr(ip6h, tun_key->tos, 0); 663 /* the HW fills up ipv6 payload len */ 664 ip6h->hop_limit = attr.ttl; 665 ip6h->daddr = attr.fl.fl6.daddr; 666 ip6h->saddr = attr.fl.fl6.saddr; 667 668 /* add tunneling protocol header */ 669 err = mlx5e_gen_ip_tunnel_header((char *)ip6h + sizeof(struct ipv6hdr), 670 &ip6h->nexthdr, e); 671 if (err) 672 goto free_encap; 673 674 e->encap_size = ipv6_encap_size; 675 kfree(e->encap_header); 676 e->encap_header = encap_header; 677 678 if (!(nud_state & NUD_VALID)) { 679 neigh_event_send(attr.n, NULL); 680 /* the encap entry will be made valid on neigh update event 681 * and not used before that. 682 */ 683 goto release_neigh; 684 } 685 686 memset(&reformat_params, 0, sizeof(reformat_params)); 687 reformat_params.type = e->reformat_type; 688 reformat_params.size = ipv6_encap_size; 689 reformat_params.data = encap_header; 690 e->pkt_reformat = mlx5_packet_reformat_alloc(priv->mdev, &reformat_params, 691 MLX5_FLOW_NAMESPACE_FDB); 692 if (IS_ERR(e->pkt_reformat)) { 693 err = PTR_ERR(e->pkt_reformat); 694 goto free_encap; 695 } 696 697 e->flags |= MLX5_ENCAP_ENTRY_VALID; 698 mlx5e_rep_queue_neigh_stats_work(netdev_priv(attr.out_dev)); 699 mlx5e_route_lookup_ipv6_put(&attr); 700 return err; 701 702 free_encap: 703 kfree(encap_header); 704 release_neigh: 705 mlx5e_route_lookup_ipv6_put(&attr); 706 return err; 707 } 708 #endif 709 710 int mlx5e_tc_tun_route_lookup(struct mlx5e_priv *priv, 711 struct mlx5_flow_spec *spec, 712 struct mlx5_flow_attr *flow_attr, 713 struct net_device *filter_dev) 714 { 715 struct mlx5_esw_flow_attr *esw_attr = flow_attr->esw_attr; 716 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 717 struct mlx5e_tc_int_port *int_port; 718 TC_TUN_ROUTE_ATTR_INIT(attr); 719 u16 vport_num; 720 int err = 0; 721 722 if (flow_attr->tun_ip_version == 4) { 723 /* Addresses are swapped for decap */ 724 attr.fl.fl4.saddr = esw_attr->rx_tun_attr->dst_ip.v4; 725 attr.fl.fl4.daddr = esw_attr->rx_tun_attr->src_ip.v4; 726 err = mlx5e_route_lookup_ipv4_get(priv, filter_dev, &attr); 727 } 728 #if IS_ENABLED(CONFIG_INET) && IS_ENABLED(CONFIG_IPV6) 729 else if (flow_attr->tun_ip_version == 6) { 730 /* Addresses are swapped for decap */ 731 attr.fl.fl6.saddr = esw_attr->rx_tun_attr->dst_ip.v6; 732 attr.fl.fl6.daddr = esw_attr->rx_tun_attr->src_ip.v6; 733 err = mlx5e_route_lookup_ipv6_get(priv, filter_dev, &attr); 734 } 735 #endif 736 else 737 return 0; 738 739 if (err) 740 return err; 741 742 if (attr.route_dev->netdev_ops == &mlx5e_netdev_ops && 743 mlx5e_tc_is_vf_tunnel(attr.out_dev, attr.route_dev)) { 744 err = mlx5e_tc_query_route_vport(attr.out_dev, attr.route_dev, &vport_num); 745 if (err) 746 goto out; 747 748 esw_attr->rx_tun_attr->decap_vport = vport_num; 749 } else if (netif_is_ovs_master(attr.route_dev) && mlx5e_tc_int_port_supported(esw)) { 750 int_port = mlx5e_tc_int_port_get(mlx5e_get_int_port_priv(priv), 751 attr.route_dev->ifindex, 752 MLX5E_TC_INT_PORT_INGRESS); 753 if (IS_ERR(int_port)) { 754 err = PTR_ERR(int_port); 755 goto out; 756 } 757 esw_attr->int_port = int_port; 758 } 759 760 out: 761 if (flow_attr->tun_ip_version == 4) 762 mlx5e_route_lookup_ipv4_put(&attr); 763 #if IS_ENABLED(CONFIG_INET) && IS_ENABLED(CONFIG_IPV6) 764 else if (flow_attr->tun_ip_version == 6) 765 mlx5e_route_lookup_ipv6_put(&attr); 766 #endif 767 return err; 768 } 769 770 bool mlx5e_tc_tun_device_to_offload(struct mlx5e_priv *priv, 771 struct net_device *netdev) 772 { 773 struct mlx5e_tc_tunnel *tunnel = mlx5e_get_tc_tun(netdev); 774 775 if (tunnel && tunnel->can_offload(priv)) 776 return true; 777 else 778 return false; 779 } 780 781 int mlx5e_tc_tun_init_encap_attr(struct net_device *tunnel_dev, 782 struct mlx5e_priv *priv, 783 struct mlx5e_encap_entry *e, 784 struct netlink_ext_ack *extack) 785 { 786 struct mlx5e_tc_tunnel *tunnel = mlx5e_get_tc_tun(tunnel_dev); 787 788 if (!tunnel) { 789 e->reformat_type = -1; 790 return -EOPNOTSUPP; 791 } 792 793 return tunnel->init_encap_attr(tunnel_dev, priv, e, extack); 794 } 795 796 int mlx5e_tc_tun_parse(struct net_device *filter_dev, 797 struct mlx5e_priv *priv, 798 struct mlx5_flow_spec *spec, 799 struct flow_cls_offload *f, 800 u8 *match_level) 801 { 802 struct mlx5e_tc_tunnel *tunnel = mlx5e_get_tc_tun(filter_dev); 803 struct flow_rule *rule = flow_cls_offload_flow_rule(f); 804 void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria, 805 outer_headers); 806 void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value, 807 outer_headers); 808 struct netlink_ext_ack *extack = f->common.extack; 809 int err = 0; 810 811 if (!tunnel) { 812 netdev_warn(priv->netdev, 813 "decapsulation offload is not supported for %s net device\n", 814 mlx5e_netdev_kind(filter_dev)); 815 err = -EOPNOTSUPP; 816 goto out; 817 } 818 819 *match_level = tunnel->match_level; 820 821 if (tunnel->parse_udp_ports) { 822 err = tunnel->parse_udp_ports(priv, spec, f, 823 headers_c, headers_v); 824 if (err) 825 goto out; 826 } 827 828 if (tunnel->parse_tunnel) { 829 err = tunnel->parse_tunnel(priv, spec, f, 830 headers_c, headers_v); 831 if (err) 832 goto out; 833 } 834 835 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_CONTROL)) { 836 struct flow_dissector_key_basic key_basic = {}; 837 struct flow_dissector_key_basic mask_basic = { 838 .n_proto = htons(0xFFFF), 839 }; 840 struct flow_match_basic match_basic = { 841 .key = &key_basic, .mask = &mask_basic, 842 }; 843 struct flow_match_control match; 844 u16 addr_type; 845 846 flow_rule_match_enc_control(rule, &match); 847 addr_type = match.key->addr_type; 848 849 /* For tunnel addr_type used same key id`s as for non-tunnel */ 850 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { 851 struct flow_match_ipv4_addrs match; 852 853 flow_rule_match_enc_ipv4_addrs(rule, &match); 854 MLX5_SET(fte_match_set_lyr_2_4, headers_c, 855 src_ipv4_src_ipv6.ipv4_layout.ipv4, 856 ntohl(match.mask->src)); 857 MLX5_SET(fte_match_set_lyr_2_4, headers_v, 858 src_ipv4_src_ipv6.ipv4_layout.ipv4, 859 ntohl(match.key->src)); 860 861 MLX5_SET(fte_match_set_lyr_2_4, headers_c, 862 dst_ipv4_dst_ipv6.ipv4_layout.ipv4, 863 ntohl(match.mask->dst)); 864 MLX5_SET(fte_match_set_lyr_2_4, headers_v, 865 dst_ipv4_dst_ipv6.ipv4_layout.ipv4, 866 ntohl(match.key->dst)); 867 868 key_basic.n_proto = htons(ETH_P_IP); 869 mlx5e_tc_set_ethertype(priv->mdev, &match_basic, true, 870 headers_c, headers_v); 871 } else if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) { 872 struct flow_match_ipv6_addrs match; 873 874 flow_rule_match_enc_ipv6_addrs(rule, &match); 875 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c, 876 src_ipv4_src_ipv6.ipv6_layout.ipv6), 877 &match.mask->src, MLX5_FLD_SZ_BYTES(ipv6_layout, 878 ipv6)); 879 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v, 880 src_ipv4_src_ipv6.ipv6_layout.ipv6), 881 &match.key->src, MLX5_FLD_SZ_BYTES(ipv6_layout, 882 ipv6)); 883 884 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c, 885 dst_ipv4_dst_ipv6.ipv6_layout.ipv6), 886 &match.mask->dst, MLX5_FLD_SZ_BYTES(ipv6_layout, 887 ipv6)); 888 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v, 889 dst_ipv4_dst_ipv6.ipv6_layout.ipv6), 890 &match.key->dst, MLX5_FLD_SZ_BYTES(ipv6_layout, 891 ipv6)); 892 893 key_basic.n_proto = htons(ETH_P_IPV6); 894 mlx5e_tc_set_ethertype(priv->mdev, &match_basic, true, 895 headers_c, headers_v); 896 } 897 } 898 899 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_IP)) { 900 struct flow_match_ip match; 901 902 flow_rule_match_enc_ip(rule, &match); 903 MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_ecn, 904 match.mask->tos & 0x3); 905 MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_ecn, 906 match.key->tos & 0x3); 907 908 MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_dscp, 909 match.mask->tos >> 2); 910 MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_dscp, 911 match.key->tos >> 2); 912 913 MLX5_SET(fte_match_set_lyr_2_4, headers_c, ttl_hoplimit, 914 match.mask->ttl); 915 MLX5_SET(fte_match_set_lyr_2_4, headers_v, ttl_hoplimit, 916 match.key->ttl); 917 918 if (match.mask->ttl && 919 !MLX5_CAP_ESW_FLOWTABLE_FDB 920 (priv->mdev, 921 ft_field_support.outer_ipv4_ttl)) { 922 NL_SET_ERR_MSG_MOD(extack, 923 "Matching on TTL is not supported"); 924 err = -EOPNOTSUPP; 925 goto out; 926 } 927 } 928 929 /* let software handle IP fragments */ 930 MLX5_SET(fte_match_set_lyr_2_4, headers_c, frag, 1); 931 MLX5_SET(fte_match_set_lyr_2_4, headers_v, frag, 0); 932 933 return 0; 934 935 out: 936 return err; 937 } 938 939 int mlx5e_tc_tun_parse_udp_ports(struct mlx5e_priv *priv, 940 struct mlx5_flow_spec *spec, 941 struct flow_cls_offload *f, 942 void *headers_c, 943 void *headers_v) 944 { 945 struct flow_rule *rule = flow_cls_offload_flow_rule(f); 946 struct netlink_ext_ack *extack = f->common.extack; 947 struct flow_match_ports enc_ports; 948 949 /* Full udp dst port must be given */ 950 951 if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_PORTS)) { 952 NL_SET_ERR_MSG_MOD(extack, 953 "UDP tunnel decap filter must include enc_dst_port condition"); 954 netdev_warn(priv->netdev, 955 "UDP tunnel decap filter must include enc_dst_port condition\n"); 956 return -EOPNOTSUPP; 957 } 958 959 flow_rule_match_enc_ports(rule, &enc_ports); 960 961 if (memchr_inv(&enc_ports.mask->dst, 0xff, 962 sizeof(enc_ports.mask->dst))) { 963 NL_SET_ERR_MSG_MOD(extack, 964 "UDP tunnel decap filter must match enc_dst_port fully"); 965 netdev_warn(priv->netdev, 966 "UDP tunnel decap filter must match enc_dst_port fully\n"); 967 return -EOPNOTSUPP; 968 } 969 970 /* match on UDP protocol and dst port number */ 971 972 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, ip_protocol); 973 MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol, IPPROTO_UDP); 974 975 MLX5_SET(fte_match_set_lyr_2_4, headers_c, udp_dport, 976 ntohs(enc_ports.mask->dst)); 977 MLX5_SET(fte_match_set_lyr_2_4, headers_v, udp_dport, 978 ntohs(enc_ports.key->dst)); 979 980 /* UDP src port on outer header is generated by HW, 981 * so it is probably a bad idea to request matching it. 982 * Nonetheless, it is allowed. 983 */ 984 985 MLX5_SET(fte_match_set_lyr_2_4, headers_c, udp_sport, 986 ntohs(enc_ports.mask->src)); 987 MLX5_SET(fte_match_set_lyr_2_4, headers_v, udp_sport, 988 ntohs(enc_ports.key->src)); 989 990 return 0; 991 } 992