1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* Copyright (c) 2021 Mellanox Technologies. */ 3 4 #include <net/fib_notifier.h> 5 #include <net/nexthop.h> 6 #include <net/ip_tunnels.h> 7 #include "tc_tun_encap.h" 8 #include "en_tc.h" 9 #include "tc_tun.h" 10 #include "rep/tc.h" 11 #include "diag/en_tc_tracepoint.h" 12 13 enum { 14 MLX5E_ROUTE_ENTRY_VALID = BIT(0), 15 }; 16 17 static int mlx5e_set_int_port_tunnel(struct mlx5e_priv *priv, 18 struct mlx5_flow_attr *attr, 19 struct mlx5e_encap_entry *e, 20 int out_index) 21 { 22 struct net_device *route_dev; 23 int err = 0; 24 25 route_dev = dev_get_by_index(dev_net(e->out_dev), e->route_dev_ifindex); 26 27 if (!route_dev || !netif_is_ovs_master(route_dev)) 28 goto out; 29 30 err = mlx5e_set_fwd_to_int_port_actions(priv, attr, e->route_dev_ifindex, 31 MLX5E_TC_INT_PORT_EGRESS, 32 &attr->action, out_index); 33 34 out: 35 if (route_dev) 36 dev_put(route_dev); 37 38 return err; 39 } 40 41 struct mlx5e_route_key { 42 int ip_version; 43 union { 44 __be32 v4; 45 struct in6_addr v6; 46 } endpoint_ip; 47 }; 48 49 struct mlx5e_route_entry { 50 struct mlx5e_route_key key; 51 struct list_head encap_entries; 52 struct list_head decap_flows; 53 u32 flags; 54 struct hlist_node hlist; 55 refcount_t refcnt; 56 int tunnel_dev_index; 57 struct rcu_head rcu; 58 }; 59 60 struct mlx5e_tc_tun_encap { 61 struct mlx5e_priv *priv; 62 struct notifier_block fib_nb; 63 spinlock_t route_lock; /* protects route_tbl */ 64 unsigned long route_tbl_last_update; 65 DECLARE_HASHTABLE(route_tbl, 8); 66 }; 67 68 static bool mlx5e_route_entry_valid(struct mlx5e_route_entry *r) 69 { 70 return r->flags & MLX5E_ROUTE_ENTRY_VALID; 71 } 72 73 int mlx5e_tc_set_attr_rx_tun(struct mlx5e_tc_flow *flow, 74 struct mlx5_flow_spec *spec) 75 { 76 struct mlx5_esw_flow_attr *esw_attr = flow->attr->esw_attr; 77 struct mlx5_rx_tun_attr *tun_attr; 78 void *daddr, *saddr; 79 u8 ip_version; 80 81 tun_attr = kvzalloc(sizeof(*tun_attr), GFP_KERNEL); 82 if (!tun_attr) 83 return -ENOMEM; 84 85 esw_attr->rx_tun_attr = tun_attr; 86 ip_version = mlx5e_tc_get_ip_version(spec, true); 87 88 if (ip_version == 4) { 89 daddr = MLX5_ADDR_OF(fte_match_param, spec->match_value, 90 outer_headers.dst_ipv4_dst_ipv6.ipv4_layout.ipv4); 91 saddr = MLX5_ADDR_OF(fte_match_param, spec->match_value, 92 outer_headers.src_ipv4_src_ipv6.ipv4_layout.ipv4); 93 tun_attr->dst_ip.v4 = *(__be32 *)daddr; 94 tun_attr->src_ip.v4 = *(__be32 *)saddr; 95 if (!tun_attr->dst_ip.v4 || !tun_attr->src_ip.v4) 96 return 0; 97 } 98 #if IS_ENABLED(CONFIG_INET) && IS_ENABLED(CONFIG_IPV6) 99 else if (ip_version == 6) { 100 int ipv6_size = MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6); 101 102 daddr = MLX5_ADDR_OF(fte_match_param, spec->match_value, 103 outer_headers.dst_ipv4_dst_ipv6.ipv6_layout.ipv6); 104 saddr = MLX5_ADDR_OF(fte_match_param, spec->match_value, 105 outer_headers.src_ipv4_src_ipv6.ipv6_layout.ipv6); 106 memcpy(&tun_attr->dst_ip.v6, daddr, ipv6_size); 107 memcpy(&tun_attr->src_ip.v6, saddr, ipv6_size); 108 if (ipv6_addr_any(&tun_attr->dst_ip.v6) || 109 ipv6_addr_any(&tun_attr->src_ip.v6)) 110 return 0; 111 } 112 #endif 113 /* Only set the flag if both src and dst ip addresses exist. They are 114 * required to establish routing. 115 */ 116 flow_flag_set(flow, TUN_RX); 117 flow->attr->tun_ip_version = ip_version; 118 return 0; 119 } 120 121 static bool mlx5e_tc_flow_all_encaps_valid(struct mlx5_esw_flow_attr *esw_attr) 122 { 123 bool all_flow_encaps_valid = true; 124 int i; 125 126 /* Flow can be associated with multiple encap entries. 127 * Before offloading the flow verify that all of them have 128 * a valid neighbour. 129 */ 130 for (i = 0; i < MLX5_MAX_FLOW_FWD_VPORTS; i++) { 131 if (!(esw_attr->dests[i].flags & MLX5_ESW_DEST_ENCAP)) 132 continue; 133 if (!(esw_attr->dests[i].flags & MLX5_ESW_DEST_ENCAP_VALID)) { 134 all_flow_encaps_valid = false; 135 break; 136 } 137 } 138 139 return all_flow_encaps_valid; 140 } 141 142 void mlx5e_tc_encap_flows_add(struct mlx5e_priv *priv, 143 struct mlx5e_encap_entry *e, 144 struct list_head *flow_list) 145 { 146 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 147 struct mlx5_pkt_reformat_params reformat_params; 148 struct mlx5_esw_flow_attr *esw_attr; 149 struct mlx5_flow_handle *rule; 150 struct mlx5_flow_attr *attr; 151 struct mlx5_flow_spec *spec; 152 struct mlx5e_tc_flow *flow; 153 int err; 154 155 if (e->flags & MLX5_ENCAP_ENTRY_NO_ROUTE) 156 return; 157 158 memset(&reformat_params, 0, sizeof(reformat_params)); 159 reformat_params.type = e->reformat_type; 160 reformat_params.size = e->encap_size; 161 reformat_params.data = e->encap_header; 162 e->pkt_reformat = mlx5_packet_reformat_alloc(priv->mdev, 163 &reformat_params, 164 MLX5_FLOW_NAMESPACE_FDB); 165 if (IS_ERR(e->pkt_reformat)) { 166 mlx5_core_warn(priv->mdev, "Failed to offload cached encapsulation header, %lu\n", 167 PTR_ERR(e->pkt_reformat)); 168 return; 169 } 170 e->flags |= MLX5_ENCAP_ENTRY_VALID; 171 mlx5e_rep_queue_neigh_stats_work(priv); 172 173 list_for_each_entry(flow, flow_list, tmp_list) { 174 if (!mlx5e_is_offloaded_flow(flow) || !flow_flag_test(flow, SLOW)) 175 continue; 176 177 spec = &flow->attr->parse_attr->spec; 178 179 attr = mlx5e_tc_get_encap_attr(flow); 180 esw_attr = attr->esw_attr; 181 esw_attr->dests[flow->tmp_entry_index].pkt_reformat = e->pkt_reformat; 182 esw_attr->dests[flow->tmp_entry_index].flags |= MLX5_ESW_DEST_ENCAP_VALID; 183 184 /* Do not offload flows with unresolved neighbors */ 185 if (!mlx5e_tc_flow_all_encaps_valid(esw_attr)) 186 continue; 187 188 err = mlx5e_tc_offload_flow_post_acts(flow); 189 if (err) { 190 mlx5_core_warn(priv->mdev, "Failed to update flow post acts, %d\n", 191 err); 192 continue; 193 } 194 195 /* update from slow path rule to encap rule */ 196 rule = mlx5e_tc_offload_fdb_rules(esw, flow, spec, flow->attr); 197 if (IS_ERR(rule)) { 198 mlx5e_tc_unoffload_flow_post_acts(flow); 199 err = PTR_ERR(rule); 200 mlx5_core_warn(priv->mdev, "Failed to update cached encapsulation flow, %d\n", 201 err); 202 continue; 203 } 204 205 mlx5e_tc_unoffload_from_slow_path(esw, flow); 206 flow->rule[0] = rule; 207 /* was unset when slow path rule removed */ 208 flow_flag_set(flow, OFFLOADED); 209 } 210 } 211 212 void mlx5e_tc_encap_flows_del(struct mlx5e_priv *priv, 213 struct mlx5e_encap_entry *e, 214 struct list_head *flow_list) 215 { 216 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 217 struct mlx5_esw_flow_attr *esw_attr; 218 struct mlx5_flow_handle *rule; 219 struct mlx5_flow_attr *attr; 220 struct mlx5_flow_spec *spec; 221 struct mlx5e_tc_flow *flow; 222 int err; 223 224 list_for_each_entry(flow, flow_list, tmp_list) { 225 if (!mlx5e_is_offloaded_flow(flow)) 226 continue; 227 228 attr = mlx5e_tc_get_encap_attr(flow); 229 esw_attr = attr->esw_attr; 230 /* mark the flow's encap dest as non-valid */ 231 esw_attr->dests[flow->tmp_entry_index].flags &= ~MLX5_ESW_DEST_ENCAP_VALID; 232 esw_attr->dests[flow->tmp_entry_index].pkt_reformat = NULL; 233 234 /* Clear pkt_reformat before checking slow path flag. Because 235 * in next iteration, the same flow is already set slow path 236 * flag, but still need to clear the pkt_reformat. 237 */ 238 if (flow_flag_test(flow, SLOW)) 239 continue; 240 241 /* update from encap rule to slow path rule */ 242 spec = &flow->attr->parse_attr->spec; 243 rule = mlx5e_tc_offload_to_slow_path(esw, flow, spec); 244 245 if (IS_ERR(rule)) { 246 err = PTR_ERR(rule); 247 mlx5_core_warn(priv->mdev, "Failed to update slow path (encap) flow, %d\n", 248 err); 249 continue; 250 } 251 252 mlx5e_tc_unoffload_fdb_rules(esw, flow, flow->attr); 253 mlx5e_tc_unoffload_flow_post_acts(flow); 254 flow->rule[0] = rule; 255 /* was unset when fast path rule removed */ 256 flow_flag_set(flow, OFFLOADED); 257 } 258 259 /* we know that the encap is valid */ 260 e->flags &= ~MLX5_ENCAP_ENTRY_VALID; 261 mlx5_packet_reformat_dealloc(priv->mdev, e->pkt_reformat); 262 e->pkt_reformat = NULL; 263 } 264 265 static void mlx5e_take_tmp_flow(struct mlx5e_tc_flow *flow, 266 struct list_head *flow_list, 267 int index) 268 { 269 if (IS_ERR(mlx5e_flow_get(flow))) { 270 /* Flow is being deleted concurrently. Wait for it to be 271 * unoffloaded from hardware, otherwise deleting encap will 272 * fail. 273 */ 274 wait_for_completion(&flow->del_hw_done); 275 return; 276 } 277 wait_for_completion(&flow->init_done); 278 279 flow->tmp_entry_index = index; 280 list_add(&flow->tmp_list, flow_list); 281 } 282 283 /* Takes reference to all flows attached to encap and adds the flows to 284 * flow_list using 'tmp_list' list_head in mlx5e_tc_flow. 285 */ 286 void mlx5e_take_all_encap_flows(struct mlx5e_encap_entry *e, struct list_head *flow_list) 287 { 288 struct encap_flow_item *efi; 289 struct mlx5e_tc_flow *flow; 290 291 list_for_each_entry(efi, &e->flows, list) { 292 flow = container_of(efi, struct mlx5e_tc_flow, encaps[efi->index]); 293 mlx5e_take_tmp_flow(flow, flow_list, efi->index); 294 } 295 } 296 297 /* Takes reference to all flows attached to route and adds the flows to 298 * flow_list using 'tmp_list' list_head in mlx5e_tc_flow. 299 */ 300 static void mlx5e_take_all_route_decap_flows(struct mlx5e_route_entry *r, 301 struct list_head *flow_list) 302 { 303 struct mlx5e_tc_flow *flow; 304 305 list_for_each_entry(flow, &r->decap_flows, decap_routes) 306 mlx5e_take_tmp_flow(flow, flow_list, 0); 307 } 308 309 typedef bool (match_cb)(struct mlx5e_encap_entry *); 310 311 static struct mlx5e_encap_entry * 312 mlx5e_get_next_matching_encap(struct mlx5e_neigh_hash_entry *nhe, 313 struct mlx5e_encap_entry *e, 314 match_cb match) 315 { 316 struct mlx5e_encap_entry *next = NULL; 317 318 retry: 319 rcu_read_lock(); 320 321 /* find encap with non-zero reference counter value */ 322 for (next = e ? 323 list_next_or_null_rcu(&nhe->encap_list, 324 &e->encap_list, 325 struct mlx5e_encap_entry, 326 encap_list) : 327 list_first_or_null_rcu(&nhe->encap_list, 328 struct mlx5e_encap_entry, 329 encap_list); 330 next; 331 next = list_next_or_null_rcu(&nhe->encap_list, 332 &next->encap_list, 333 struct mlx5e_encap_entry, 334 encap_list)) 335 if (mlx5e_encap_take(next)) 336 break; 337 338 rcu_read_unlock(); 339 340 /* release starting encap */ 341 if (e) 342 mlx5e_encap_put(netdev_priv(e->out_dev), e); 343 if (!next) 344 return next; 345 346 /* wait for encap to be fully initialized */ 347 wait_for_completion(&next->res_ready); 348 /* continue searching if encap entry is not in valid state after completion */ 349 if (!match(next)) { 350 e = next; 351 goto retry; 352 } 353 354 return next; 355 } 356 357 static bool mlx5e_encap_valid(struct mlx5e_encap_entry *e) 358 { 359 return e->flags & MLX5_ENCAP_ENTRY_VALID; 360 } 361 362 static struct mlx5e_encap_entry * 363 mlx5e_get_next_valid_encap(struct mlx5e_neigh_hash_entry *nhe, 364 struct mlx5e_encap_entry *e) 365 { 366 return mlx5e_get_next_matching_encap(nhe, e, mlx5e_encap_valid); 367 } 368 369 static bool mlx5e_encap_initialized(struct mlx5e_encap_entry *e) 370 { 371 return e->compl_result >= 0; 372 } 373 374 struct mlx5e_encap_entry * 375 mlx5e_get_next_init_encap(struct mlx5e_neigh_hash_entry *nhe, 376 struct mlx5e_encap_entry *e) 377 { 378 return mlx5e_get_next_matching_encap(nhe, e, mlx5e_encap_initialized); 379 } 380 381 void mlx5e_tc_update_neigh_used_value(struct mlx5e_neigh_hash_entry *nhe) 382 { 383 struct mlx5e_neigh *m_neigh = &nhe->m_neigh; 384 struct mlx5e_encap_entry *e = NULL; 385 struct mlx5e_tc_flow *flow; 386 struct mlx5_fc *counter; 387 struct neigh_table *tbl; 388 bool neigh_used = false; 389 struct neighbour *n; 390 u64 lastuse; 391 392 if (m_neigh->family == AF_INET) 393 tbl = &arp_tbl; 394 #if IS_ENABLED(CONFIG_IPV6) 395 else if (m_neigh->family == AF_INET6) 396 tbl = ipv6_stub->nd_tbl; 397 #endif 398 else 399 return; 400 401 /* mlx5e_get_next_valid_encap() releases previous encap before returning 402 * next one. 403 */ 404 while ((e = mlx5e_get_next_valid_encap(nhe, e)) != NULL) { 405 struct mlx5e_priv *priv = netdev_priv(e->out_dev); 406 struct encap_flow_item *efi, *tmp; 407 struct mlx5_eswitch *esw; 408 LIST_HEAD(flow_list); 409 410 esw = priv->mdev->priv.eswitch; 411 mutex_lock(&esw->offloads.encap_tbl_lock); 412 list_for_each_entry_safe(efi, tmp, &e->flows, list) { 413 flow = container_of(efi, struct mlx5e_tc_flow, 414 encaps[efi->index]); 415 if (IS_ERR(mlx5e_flow_get(flow))) 416 continue; 417 list_add(&flow->tmp_list, &flow_list); 418 419 if (mlx5e_is_offloaded_flow(flow)) { 420 counter = mlx5e_tc_get_counter(flow); 421 lastuse = mlx5_fc_query_lastuse(counter); 422 if (time_after((unsigned long)lastuse, nhe->reported_lastuse)) { 423 neigh_used = true; 424 break; 425 } 426 } 427 } 428 mutex_unlock(&esw->offloads.encap_tbl_lock); 429 430 mlx5e_put_flow_list(priv, &flow_list); 431 if (neigh_used) { 432 /* release current encap before breaking the loop */ 433 mlx5e_encap_put(priv, e); 434 break; 435 } 436 } 437 438 trace_mlx5e_tc_update_neigh_used_value(nhe, neigh_used); 439 440 if (neigh_used) { 441 nhe->reported_lastuse = jiffies; 442 443 /* find the relevant neigh according to the cached device and 444 * dst ip pair 445 */ 446 n = neigh_lookup(tbl, &m_neigh->dst_ip, READ_ONCE(nhe->neigh_dev)); 447 if (!n) 448 return; 449 450 neigh_event_send(n, NULL); 451 neigh_release(n); 452 } 453 } 454 455 static void mlx5e_encap_dealloc(struct mlx5e_priv *priv, struct mlx5e_encap_entry *e) 456 { 457 WARN_ON(!list_empty(&e->flows)); 458 459 if (e->compl_result > 0) { 460 mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e); 461 462 if (e->flags & MLX5_ENCAP_ENTRY_VALID) 463 mlx5_packet_reformat_dealloc(priv->mdev, e->pkt_reformat); 464 } 465 466 kfree(e->tun_info); 467 kfree(e->encap_header); 468 kfree_rcu(e, rcu); 469 } 470 471 static void mlx5e_decap_dealloc(struct mlx5e_priv *priv, 472 struct mlx5e_decap_entry *d) 473 { 474 WARN_ON(!list_empty(&d->flows)); 475 476 if (!d->compl_result) 477 mlx5_packet_reformat_dealloc(priv->mdev, d->pkt_reformat); 478 479 kfree_rcu(d, rcu); 480 } 481 482 void mlx5e_encap_put(struct mlx5e_priv *priv, struct mlx5e_encap_entry *e) 483 { 484 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 485 486 if (!refcount_dec_and_mutex_lock(&e->refcnt, &esw->offloads.encap_tbl_lock)) 487 return; 488 list_del(&e->route_list); 489 hash_del_rcu(&e->encap_hlist); 490 mutex_unlock(&esw->offloads.encap_tbl_lock); 491 492 mlx5e_encap_dealloc(priv, e); 493 } 494 495 static void mlx5e_decap_put(struct mlx5e_priv *priv, struct mlx5e_decap_entry *d) 496 { 497 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 498 499 if (!refcount_dec_and_mutex_lock(&d->refcnt, &esw->offloads.decap_tbl_lock)) 500 return; 501 hash_del_rcu(&d->hlist); 502 mutex_unlock(&esw->offloads.decap_tbl_lock); 503 504 mlx5e_decap_dealloc(priv, d); 505 } 506 507 static void mlx5e_detach_encap_route(struct mlx5e_priv *priv, 508 struct mlx5e_tc_flow *flow, 509 int out_index); 510 511 void mlx5e_detach_encap(struct mlx5e_priv *priv, 512 struct mlx5e_tc_flow *flow, 513 struct mlx5_flow_attr *attr, 514 int out_index) 515 { 516 struct mlx5e_encap_entry *e = flow->encaps[out_index].e; 517 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 518 519 if (!mlx5e_is_eswitch_flow(flow)) 520 return; 521 522 if (attr->esw_attr->dests[out_index].flags & 523 MLX5_ESW_DEST_CHAIN_WITH_SRC_PORT_CHANGE) 524 mlx5e_detach_encap_route(priv, flow, out_index); 525 526 /* flow wasn't fully initialized */ 527 if (!e) 528 return; 529 530 mutex_lock(&esw->offloads.encap_tbl_lock); 531 list_del(&flow->encaps[out_index].list); 532 flow->encaps[out_index].e = NULL; 533 if (!refcount_dec_and_test(&e->refcnt)) { 534 mutex_unlock(&esw->offloads.encap_tbl_lock); 535 return; 536 } 537 list_del(&e->route_list); 538 hash_del_rcu(&e->encap_hlist); 539 mutex_unlock(&esw->offloads.encap_tbl_lock); 540 541 mlx5e_encap_dealloc(priv, e); 542 } 543 544 void mlx5e_detach_decap(struct mlx5e_priv *priv, 545 struct mlx5e_tc_flow *flow) 546 { 547 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 548 struct mlx5e_decap_entry *d = flow->decap_reformat; 549 550 if (!d) 551 return; 552 553 mutex_lock(&esw->offloads.decap_tbl_lock); 554 list_del(&flow->l3_to_l2_reformat); 555 flow->decap_reformat = NULL; 556 557 if (!refcount_dec_and_test(&d->refcnt)) { 558 mutex_unlock(&esw->offloads.decap_tbl_lock); 559 return; 560 } 561 hash_del_rcu(&d->hlist); 562 mutex_unlock(&esw->offloads.decap_tbl_lock); 563 564 mlx5e_decap_dealloc(priv, d); 565 } 566 567 bool mlx5e_tc_tun_encap_info_equal_generic(struct mlx5e_encap_key *a, 568 struct mlx5e_encap_key *b) 569 { 570 return memcmp(a->ip_tun_key, b->ip_tun_key, sizeof(*a->ip_tun_key)) == 0 && 571 a->tc_tunnel->tunnel_type == b->tc_tunnel->tunnel_type; 572 } 573 574 bool mlx5e_tc_tun_encap_info_equal_options(struct mlx5e_encap_key *a, 575 struct mlx5e_encap_key *b, 576 __be16 tun_flags) 577 { 578 struct ip_tunnel_info *a_info; 579 struct ip_tunnel_info *b_info; 580 bool a_has_opts, b_has_opts; 581 582 if (!mlx5e_tc_tun_encap_info_equal_generic(a, b)) 583 return false; 584 585 a_has_opts = !!(a->ip_tun_key->tun_flags & tun_flags); 586 b_has_opts = !!(b->ip_tun_key->tun_flags & tun_flags); 587 588 /* keys are equal when both don't have any options attached */ 589 if (!a_has_opts && !b_has_opts) 590 return true; 591 592 if (a_has_opts != b_has_opts) 593 return false; 594 595 /* options stored in memory next to ip_tunnel_info struct */ 596 a_info = container_of(a->ip_tun_key, struct ip_tunnel_info, key); 597 b_info = container_of(b->ip_tun_key, struct ip_tunnel_info, key); 598 599 return a_info->options_len == b_info->options_len && 600 !memcmp(ip_tunnel_info_opts(a_info), 601 ip_tunnel_info_opts(b_info), 602 a_info->options_len); 603 } 604 605 static int cmp_decap_info(struct mlx5e_decap_key *a, 606 struct mlx5e_decap_key *b) 607 { 608 return memcmp(&a->key, &b->key, sizeof(b->key)); 609 } 610 611 static int hash_encap_info(struct mlx5e_encap_key *key) 612 { 613 return jhash(key->ip_tun_key, sizeof(*key->ip_tun_key), 614 key->tc_tunnel->tunnel_type); 615 } 616 617 static int hash_decap_info(struct mlx5e_decap_key *key) 618 { 619 return jhash(&key->key, sizeof(key->key), 0); 620 } 621 622 bool mlx5e_encap_take(struct mlx5e_encap_entry *e) 623 { 624 return refcount_inc_not_zero(&e->refcnt); 625 } 626 627 static bool mlx5e_decap_take(struct mlx5e_decap_entry *e) 628 { 629 return refcount_inc_not_zero(&e->refcnt); 630 } 631 632 static struct mlx5e_encap_entry * 633 mlx5e_encap_get(struct mlx5e_priv *priv, struct mlx5e_encap_key *key, 634 uintptr_t hash_key) 635 { 636 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 637 struct mlx5e_encap_key e_key; 638 struct mlx5e_encap_entry *e; 639 640 hash_for_each_possible_rcu(esw->offloads.encap_tbl, e, 641 encap_hlist, hash_key) { 642 e_key.ip_tun_key = &e->tun_info->key; 643 e_key.tc_tunnel = e->tunnel; 644 if (e->tunnel->encap_info_equal(&e_key, key) && 645 mlx5e_encap_take(e)) 646 return e; 647 } 648 649 return NULL; 650 } 651 652 static struct mlx5e_decap_entry * 653 mlx5e_decap_get(struct mlx5e_priv *priv, struct mlx5e_decap_key *key, 654 uintptr_t hash_key) 655 { 656 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 657 struct mlx5e_decap_key r_key; 658 struct mlx5e_decap_entry *e; 659 660 hash_for_each_possible_rcu(esw->offloads.decap_tbl, e, 661 hlist, hash_key) { 662 r_key = e->key; 663 if (!cmp_decap_info(&r_key, key) && 664 mlx5e_decap_take(e)) 665 return e; 666 } 667 return NULL; 668 } 669 670 struct ip_tunnel_info *mlx5e_dup_tun_info(const struct ip_tunnel_info *tun_info) 671 { 672 size_t tun_size = sizeof(*tun_info) + tun_info->options_len; 673 674 return kmemdup(tun_info, tun_size, GFP_KERNEL); 675 } 676 677 static bool is_duplicated_encap_entry(struct mlx5e_priv *priv, 678 struct mlx5e_tc_flow *flow, 679 int out_index, 680 struct mlx5e_encap_entry *e, 681 struct netlink_ext_ack *extack) 682 { 683 int i; 684 685 for (i = 0; i < out_index; i++) { 686 if (flow->encaps[i].e != e) 687 continue; 688 NL_SET_ERR_MSG_MOD(extack, "can't duplicate encap action"); 689 netdev_err(priv->netdev, "can't duplicate encap action\n"); 690 return true; 691 } 692 693 return false; 694 } 695 696 static int mlx5e_set_vf_tunnel(struct mlx5_eswitch *esw, 697 struct mlx5_flow_attr *attr, 698 struct mlx5e_tc_mod_hdr_acts *mod_hdr_acts, 699 struct net_device *out_dev, 700 int route_dev_ifindex, 701 int out_index) 702 { 703 struct mlx5_esw_flow_attr *esw_attr = attr->esw_attr; 704 struct net_device *route_dev; 705 u16 vport_num; 706 int err = 0; 707 u32 data; 708 709 route_dev = dev_get_by_index(dev_net(out_dev), route_dev_ifindex); 710 711 if (!route_dev || route_dev->netdev_ops != &mlx5e_netdev_ops || 712 !mlx5e_tc_is_vf_tunnel(out_dev, route_dev)) 713 goto out; 714 715 err = mlx5e_tc_query_route_vport(out_dev, route_dev, &vport_num); 716 if (err) 717 goto out; 718 719 attr->dest_chain = 0; 720 attr->action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR; 721 esw_attr->dests[out_index].flags |= MLX5_ESW_DEST_CHAIN_WITH_SRC_PORT_CHANGE; 722 data = mlx5_eswitch_get_vport_metadata_for_set(esw_attr->in_mdev->priv.eswitch, 723 vport_num); 724 err = mlx5e_tc_match_to_reg_set_and_get_id(esw->dev, mod_hdr_acts, 725 MLX5_FLOW_NAMESPACE_FDB, 726 VPORT_TO_REG, data); 727 if (err >= 0) { 728 esw_attr->dests[out_index].src_port_rewrite_act_id = err; 729 err = 0; 730 } 731 732 out: 733 if (route_dev) 734 dev_put(route_dev); 735 return err; 736 } 737 738 static int mlx5e_update_vf_tunnel(struct mlx5_eswitch *esw, 739 struct mlx5_esw_flow_attr *attr, 740 struct mlx5e_tc_mod_hdr_acts *mod_hdr_acts, 741 struct net_device *out_dev, 742 int route_dev_ifindex, 743 int out_index) 744 { 745 int act_id = attr->dests[out_index].src_port_rewrite_act_id; 746 struct net_device *route_dev; 747 u16 vport_num; 748 int err = 0; 749 u32 data; 750 751 route_dev = dev_get_by_index(dev_net(out_dev), route_dev_ifindex); 752 753 if (!route_dev || route_dev->netdev_ops != &mlx5e_netdev_ops || 754 !mlx5e_tc_is_vf_tunnel(out_dev, route_dev)) { 755 err = -ENODEV; 756 goto out; 757 } 758 759 err = mlx5e_tc_query_route_vport(out_dev, route_dev, &vport_num); 760 if (err) 761 goto out; 762 763 data = mlx5_eswitch_get_vport_metadata_for_set(attr->in_mdev->priv.eswitch, 764 vport_num); 765 mlx5e_tc_match_to_reg_mod_hdr_change(esw->dev, mod_hdr_acts, VPORT_TO_REG, act_id, data); 766 767 out: 768 if (route_dev) 769 dev_put(route_dev); 770 return err; 771 } 772 773 static unsigned int mlx5e_route_tbl_get_last_update(struct mlx5e_priv *priv) 774 { 775 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 776 struct mlx5_rep_uplink_priv *uplink_priv; 777 struct mlx5e_rep_priv *uplink_rpriv; 778 struct mlx5e_tc_tun_encap *encap; 779 unsigned int ret; 780 781 uplink_rpriv = mlx5_eswitch_get_uplink_priv(esw, REP_ETH); 782 uplink_priv = &uplink_rpriv->uplink_priv; 783 encap = uplink_priv->encap; 784 785 spin_lock_bh(&encap->route_lock); 786 ret = encap->route_tbl_last_update; 787 spin_unlock_bh(&encap->route_lock); 788 return ret; 789 } 790 791 static int mlx5e_attach_encap_route(struct mlx5e_priv *priv, 792 struct mlx5e_tc_flow *flow, 793 struct mlx5_flow_attr *attr, 794 struct mlx5e_encap_entry *e, 795 bool new_encap_entry, 796 unsigned long tbl_time_before, 797 int out_index); 798 799 int mlx5e_attach_encap(struct mlx5e_priv *priv, 800 struct mlx5e_tc_flow *flow, 801 struct mlx5_flow_attr *attr, 802 struct net_device *mirred_dev, 803 int out_index, 804 struct netlink_ext_ack *extack, 805 struct net_device **encap_dev) 806 { 807 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 808 struct mlx5e_tc_flow_parse_attr *parse_attr; 809 const struct ip_tunnel_info *tun_info; 810 const struct mlx5e_mpls_info *mpls_info; 811 unsigned long tbl_time_before = 0; 812 struct mlx5e_encap_entry *e; 813 struct mlx5e_encap_key key; 814 bool entry_created = false; 815 unsigned short family; 816 uintptr_t hash_key; 817 int err = 0; 818 819 parse_attr = attr->parse_attr; 820 tun_info = parse_attr->tun_info[out_index]; 821 mpls_info = &parse_attr->mpls_info[out_index]; 822 family = ip_tunnel_info_af(tun_info); 823 key.ip_tun_key = &tun_info->key; 824 key.tc_tunnel = mlx5e_get_tc_tun(mirred_dev); 825 if (!key.tc_tunnel) { 826 NL_SET_ERR_MSG_MOD(extack, "Unsupported tunnel"); 827 return -EOPNOTSUPP; 828 } 829 830 hash_key = hash_encap_info(&key); 831 832 mutex_lock(&esw->offloads.encap_tbl_lock); 833 e = mlx5e_encap_get(priv, &key, hash_key); 834 835 /* must verify if encap is valid or not */ 836 if (e) { 837 /* Check that entry was not already attached to this flow */ 838 if (is_duplicated_encap_entry(priv, flow, out_index, e, extack)) { 839 err = -EOPNOTSUPP; 840 goto out_err; 841 } 842 843 mutex_unlock(&esw->offloads.encap_tbl_lock); 844 wait_for_completion(&e->res_ready); 845 846 /* Protect against concurrent neigh update. */ 847 mutex_lock(&esw->offloads.encap_tbl_lock); 848 if (e->compl_result < 0) { 849 err = -EREMOTEIO; 850 goto out_err; 851 } 852 goto attach_flow; 853 } 854 855 e = kzalloc(sizeof(*e), GFP_KERNEL); 856 if (!e) { 857 err = -ENOMEM; 858 goto out_err; 859 } 860 861 refcount_set(&e->refcnt, 1); 862 init_completion(&e->res_ready); 863 entry_created = true; 864 INIT_LIST_HEAD(&e->route_list); 865 866 tun_info = mlx5e_dup_tun_info(tun_info); 867 if (!tun_info) { 868 err = -ENOMEM; 869 goto out_err_init; 870 } 871 e->tun_info = tun_info; 872 memcpy(&e->mpls_info, mpls_info, sizeof(*mpls_info)); 873 err = mlx5e_tc_tun_init_encap_attr(mirred_dev, priv, e, extack); 874 if (err) 875 goto out_err_init; 876 877 INIT_LIST_HEAD(&e->flows); 878 hash_add_rcu(esw->offloads.encap_tbl, &e->encap_hlist, hash_key); 879 tbl_time_before = mlx5e_route_tbl_get_last_update(priv); 880 mutex_unlock(&esw->offloads.encap_tbl_lock); 881 882 if (family == AF_INET) 883 err = mlx5e_tc_tun_create_header_ipv4(priv, mirred_dev, e); 884 else if (family == AF_INET6) 885 err = mlx5e_tc_tun_create_header_ipv6(priv, mirred_dev, e); 886 887 /* Protect against concurrent neigh update. */ 888 mutex_lock(&esw->offloads.encap_tbl_lock); 889 complete_all(&e->res_ready); 890 if (err) { 891 e->compl_result = err; 892 goto out_err; 893 } 894 e->compl_result = 1; 895 896 attach_flow: 897 err = mlx5e_attach_encap_route(priv, flow, attr, e, entry_created, 898 tbl_time_before, out_index); 899 if (err) 900 goto out_err; 901 902 err = mlx5e_set_int_port_tunnel(priv, attr, e, out_index); 903 if (err == -EOPNOTSUPP) { 904 /* If device doesn't support int port offload, 905 * redirect to uplink vport. 906 */ 907 mlx5_core_dbg(priv->mdev, "attaching int port as encap dev not supported, using uplink\n"); 908 err = 0; 909 } else if (err) { 910 goto out_err; 911 } 912 913 flow->encaps[out_index].e = e; 914 list_add(&flow->encaps[out_index].list, &e->flows); 915 flow->encaps[out_index].index = out_index; 916 *encap_dev = e->out_dev; 917 if (e->flags & MLX5_ENCAP_ENTRY_VALID) { 918 attr->esw_attr->dests[out_index].pkt_reformat = e->pkt_reformat; 919 attr->esw_attr->dests[out_index].flags |= MLX5_ESW_DEST_ENCAP_VALID; 920 } else { 921 flow_flag_set(flow, SLOW); 922 } 923 mutex_unlock(&esw->offloads.encap_tbl_lock); 924 925 return err; 926 927 out_err: 928 mutex_unlock(&esw->offloads.encap_tbl_lock); 929 if (e) 930 mlx5e_encap_put(priv, e); 931 return err; 932 933 out_err_init: 934 mutex_unlock(&esw->offloads.encap_tbl_lock); 935 kfree(tun_info); 936 kfree(e); 937 return err; 938 } 939 940 int mlx5e_attach_decap(struct mlx5e_priv *priv, 941 struct mlx5e_tc_flow *flow, 942 struct netlink_ext_ack *extack) 943 { 944 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 945 struct mlx5_esw_flow_attr *attr = flow->attr->esw_attr; 946 struct mlx5_pkt_reformat_params reformat_params; 947 struct mlx5e_decap_entry *d; 948 struct mlx5e_decap_key key; 949 uintptr_t hash_key; 950 int err = 0; 951 952 if (sizeof(attr->eth) > MLX5_CAP_ESW(priv->mdev, max_encap_header_size)) { 953 NL_SET_ERR_MSG_MOD(extack, 954 "encap header larger than max supported"); 955 return -EOPNOTSUPP; 956 } 957 958 key.key = attr->eth; 959 hash_key = hash_decap_info(&key); 960 mutex_lock(&esw->offloads.decap_tbl_lock); 961 d = mlx5e_decap_get(priv, &key, hash_key); 962 if (d) { 963 mutex_unlock(&esw->offloads.decap_tbl_lock); 964 wait_for_completion(&d->res_ready); 965 mutex_lock(&esw->offloads.decap_tbl_lock); 966 if (d->compl_result) { 967 err = -EREMOTEIO; 968 goto out_free; 969 } 970 goto found; 971 } 972 973 d = kzalloc(sizeof(*d), GFP_KERNEL); 974 if (!d) { 975 err = -ENOMEM; 976 goto out_err; 977 } 978 979 d->key = key; 980 refcount_set(&d->refcnt, 1); 981 init_completion(&d->res_ready); 982 INIT_LIST_HEAD(&d->flows); 983 hash_add_rcu(esw->offloads.decap_tbl, &d->hlist, hash_key); 984 mutex_unlock(&esw->offloads.decap_tbl_lock); 985 986 memset(&reformat_params, 0, sizeof(reformat_params)); 987 reformat_params.type = MLX5_REFORMAT_TYPE_L3_TUNNEL_TO_L2; 988 reformat_params.size = sizeof(attr->eth); 989 reformat_params.data = &attr->eth; 990 d->pkt_reformat = mlx5_packet_reformat_alloc(priv->mdev, 991 &reformat_params, 992 MLX5_FLOW_NAMESPACE_FDB); 993 if (IS_ERR(d->pkt_reformat)) { 994 err = PTR_ERR(d->pkt_reformat); 995 d->compl_result = err; 996 } 997 mutex_lock(&esw->offloads.decap_tbl_lock); 998 complete_all(&d->res_ready); 999 if (err) 1000 goto out_free; 1001 1002 found: 1003 flow->decap_reformat = d; 1004 attr->decap_pkt_reformat = d->pkt_reformat; 1005 list_add(&flow->l3_to_l2_reformat, &d->flows); 1006 mutex_unlock(&esw->offloads.decap_tbl_lock); 1007 return 0; 1008 1009 out_free: 1010 mutex_unlock(&esw->offloads.decap_tbl_lock); 1011 mlx5e_decap_put(priv, d); 1012 return err; 1013 1014 out_err: 1015 mutex_unlock(&esw->offloads.decap_tbl_lock); 1016 return err; 1017 } 1018 1019 int mlx5e_tc_tun_encap_dests_set(struct mlx5e_priv *priv, 1020 struct mlx5e_tc_flow *flow, 1021 struct mlx5_flow_attr *attr, 1022 struct netlink_ext_ack *extack, 1023 bool *vf_tun) 1024 { 1025 struct mlx5e_tc_flow_parse_attr *parse_attr; 1026 struct mlx5_esw_flow_attr *esw_attr; 1027 struct net_device *encap_dev = NULL; 1028 struct mlx5e_rep_priv *rpriv; 1029 struct mlx5e_priv *out_priv; 1030 int out_index; 1031 int err = 0; 1032 1033 if (!mlx5e_is_eswitch_flow(flow)) 1034 return 0; 1035 1036 parse_attr = attr->parse_attr; 1037 esw_attr = attr->esw_attr; 1038 *vf_tun = false; 1039 1040 for (out_index = 0; out_index < MLX5_MAX_FLOW_FWD_VPORTS; out_index++) { 1041 struct net_device *out_dev; 1042 int mirred_ifindex; 1043 1044 if (!(esw_attr->dests[out_index].flags & MLX5_ESW_DEST_ENCAP)) 1045 continue; 1046 1047 mirred_ifindex = parse_attr->mirred_ifindex[out_index]; 1048 out_dev = dev_get_by_index(dev_net(priv->netdev), mirred_ifindex); 1049 if (!out_dev) { 1050 NL_SET_ERR_MSG_MOD(extack, "Requested mirred device not found"); 1051 err = -ENODEV; 1052 goto out; 1053 } 1054 err = mlx5e_attach_encap(priv, flow, attr, out_dev, out_index, 1055 extack, &encap_dev); 1056 dev_put(out_dev); 1057 if (err) 1058 goto out; 1059 1060 if (esw_attr->dests[out_index].flags & 1061 MLX5_ESW_DEST_CHAIN_WITH_SRC_PORT_CHANGE && 1062 !esw_attr->dest_int_port) 1063 *vf_tun = true; 1064 1065 out_priv = netdev_priv(encap_dev); 1066 rpriv = out_priv->ppriv; 1067 esw_attr->dests[out_index].rep = rpriv->rep; 1068 esw_attr->dests[out_index].mdev = out_priv->mdev; 1069 } 1070 1071 if (*vf_tun && esw_attr->out_count > 1) { 1072 NL_SET_ERR_MSG_MOD(extack, "VF tunnel encap with mirroring is not supported"); 1073 err = -EOPNOTSUPP; 1074 goto out; 1075 } 1076 1077 out: 1078 return err; 1079 } 1080 1081 void mlx5e_tc_tun_encap_dests_unset(struct mlx5e_priv *priv, 1082 struct mlx5e_tc_flow *flow, 1083 struct mlx5_flow_attr *attr) 1084 { 1085 struct mlx5_esw_flow_attr *esw_attr; 1086 int out_index; 1087 1088 if (!mlx5e_is_eswitch_flow(flow)) 1089 return; 1090 1091 esw_attr = attr->esw_attr; 1092 1093 for (out_index = 0; out_index < MLX5_MAX_FLOW_FWD_VPORTS; out_index++) { 1094 if (!(esw_attr->dests[out_index].flags & MLX5_ESW_DEST_ENCAP)) 1095 continue; 1096 1097 mlx5e_detach_encap(flow->priv, flow, attr, out_index); 1098 kfree(attr->parse_attr->tun_info[out_index]); 1099 } 1100 } 1101 1102 static int cmp_route_info(struct mlx5e_route_key *a, 1103 struct mlx5e_route_key *b) 1104 { 1105 if (a->ip_version == 4 && b->ip_version == 4) 1106 return memcmp(&a->endpoint_ip.v4, &b->endpoint_ip.v4, 1107 sizeof(a->endpoint_ip.v4)); 1108 else if (a->ip_version == 6 && b->ip_version == 6) 1109 return memcmp(&a->endpoint_ip.v6, &b->endpoint_ip.v6, 1110 sizeof(a->endpoint_ip.v6)); 1111 return 1; 1112 } 1113 1114 static u32 hash_route_info(struct mlx5e_route_key *key) 1115 { 1116 if (key->ip_version == 4) 1117 return jhash(&key->endpoint_ip.v4, sizeof(key->endpoint_ip.v4), 0); 1118 return jhash(&key->endpoint_ip.v6, sizeof(key->endpoint_ip.v6), 0); 1119 } 1120 1121 static void mlx5e_route_dealloc(struct mlx5e_priv *priv, 1122 struct mlx5e_route_entry *r) 1123 { 1124 WARN_ON(!list_empty(&r->decap_flows)); 1125 WARN_ON(!list_empty(&r->encap_entries)); 1126 1127 kfree_rcu(r, rcu); 1128 } 1129 1130 static void mlx5e_route_put(struct mlx5e_priv *priv, struct mlx5e_route_entry *r) 1131 { 1132 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 1133 1134 if (!refcount_dec_and_mutex_lock(&r->refcnt, &esw->offloads.encap_tbl_lock)) 1135 return; 1136 1137 hash_del_rcu(&r->hlist); 1138 mutex_unlock(&esw->offloads.encap_tbl_lock); 1139 1140 mlx5e_route_dealloc(priv, r); 1141 } 1142 1143 static void mlx5e_route_put_locked(struct mlx5e_priv *priv, struct mlx5e_route_entry *r) 1144 { 1145 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 1146 1147 lockdep_assert_held(&esw->offloads.encap_tbl_lock); 1148 1149 if (!refcount_dec_and_test(&r->refcnt)) 1150 return; 1151 hash_del_rcu(&r->hlist); 1152 mlx5e_route_dealloc(priv, r); 1153 } 1154 1155 static struct mlx5e_route_entry * 1156 mlx5e_route_get(struct mlx5e_tc_tun_encap *encap, struct mlx5e_route_key *key, 1157 u32 hash_key) 1158 { 1159 struct mlx5e_route_key r_key; 1160 struct mlx5e_route_entry *r; 1161 1162 hash_for_each_possible(encap->route_tbl, r, hlist, hash_key) { 1163 r_key = r->key; 1164 if (!cmp_route_info(&r_key, key) && 1165 refcount_inc_not_zero(&r->refcnt)) 1166 return r; 1167 } 1168 return NULL; 1169 } 1170 1171 static struct mlx5e_route_entry * 1172 mlx5e_route_get_create(struct mlx5e_priv *priv, 1173 struct mlx5e_route_key *key, 1174 int tunnel_dev_index, 1175 unsigned long *route_tbl_change_time) 1176 { 1177 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 1178 struct mlx5_rep_uplink_priv *uplink_priv; 1179 struct mlx5e_rep_priv *uplink_rpriv; 1180 struct mlx5e_tc_tun_encap *encap; 1181 struct mlx5e_route_entry *r; 1182 u32 hash_key; 1183 1184 uplink_rpriv = mlx5_eswitch_get_uplink_priv(esw, REP_ETH); 1185 uplink_priv = &uplink_rpriv->uplink_priv; 1186 encap = uplink_priv->encap; 1187 1188 hash_key = hash_route_info(key); 1189 spin_lock_bh(&encap->route_lock); 1190 r = mlx5e_route_get(encap, key, hash_key); 1191 spin_unlock_bh(&encap->route_lock); 1192 if (r) { 1193 if (!mlx5e_route_entry_valid(r)) { 1194 mlx5e_route_put_locked(priv, r); 1195 return ERR_PTR(-EINVAL); 1196 } 1197 return r; 1198 } 1199 1200 r = kzalloc(sizeof(*r), GFP_KERNEL); 1201 if (!r) 1202 return ERR_PTR(-ENOMEM); 1203 1204 r->key = *key; 1205 r->flags |= MLX5E_ROUTE_ENTRY_VALID; 1206 r->tunnel_dev_index = tunnel_dev_index; 1207 refcount_set(&r->refcnt, 1); 1208 INIT_LIST_HEAD(&r->decap_flows); 1209 INIT_LIST_HEAD(&r->encap_entries); 1210 1211 spin_lock_bh(&encap->route_lock); 1212 *route_tbl_change_time = encap->route_tbl_last_update; 1213 hash_add(encap->route_tbl, &r->hlist, hash_key); 1214 spin_unlock_bh(&encap->route_lock); 1215 1216 return r; 1217 } 1218 1219 static struct mlx5e_route_entry * 1220 mlx5e_route_lookup_for_update(struct mlx5e_tc_tun_encap *encap, struct mlx5e_route_key *key) 1221 { 1222 u32 hash_key = hash_route_info(key); 1223 struct mlx5e_route_entry *r; 1224 1225 spin_lock_bh(&encap->route_lock); 1226 encap->route_tbl_last_update = jiffies; 1227 r = mlx5e_route_get(encap, key, hash_key); 1228 spin_unlock_bh(&encap->route_lock); 1229 1230 return r; 1231 } 1232 1233 struct mlx5e_tc_fib_event_data { 1234 struct work_struct work; 1235 unsigned long event; 1236 struct mlx5e_route_entry *r; 1237 struct net_device *ul_dev; 1238 }; 1239 1240 static void mlx5e_tc_fib_event_work(struct work_struct *work); 1241 static struct mlx5e_tc_fib_event_data * 1242 mlx5e_tc_init_fib_work(unsigned long event, struct net_device *ul_dev, gfp_t flags) 1243 { 1244 struct mlx5e_tc_fib_event_data *fib_work; 1245 1246 fib_work = kzalloc(sizeof(*fib_work), flags); 1247 if (WARN_ON(!fib_work)) 1248 return NULL; 1249 1250 INIT_WORK(&fib_work->work, mlx5e_tc_fib_event_work); 1251 fib_work->event = event; 1252 fib_work->ul_dev = ul_dev; 1253 1254 return fib_work; 1255 } 1256 1257 static int 1258 mlx5e_route_enqueue_update(struct mlx5e_priv *priv, 1259 struct mlx5e_route_entry *r, 1260 unsigned long event) 1261 { 1262 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 1263 struct mlx5e_tc_fib_event_data *fib_work; 1264 struct mlx5e_rep_priv *uplink_rpriv; 1265 struct net_device *ul_dev; 1266 1267 uplink_rpriv = mlx5_eswitch_get_uplink_priv(esw, REP_ETH); 1268 ul_dev = uplink_rpriv->netdev; 1269 1270 fib_work = mlx5e_tc_init_fib_work(event, ul_dev, GFP_KERNEL); 1271 if (!fib_work) 1272 return -ENOMEM; 1273 1274 dev_hold(ul_dev); 1275 refcount_inc(&r->refcnt); 1276 fib_work->r = r; 1277 queue_work(priv->wq, &fib_work->work); 1278 1279 return 0; 1280 } 1281 1282 int mlx5e_attach_decap_route(struct mlx5e_priv *priv, 1283 struct mlx5e_tc_flow *flow) 1284 { 1285 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 1286 unsigned long tbl_time_before, tbl_time_after; 1287 struct mlx5e_tc_flow_parse_attr *parse_attr; 1288 struct mlx5_flow_attr *attr = flow->attr; 1289 struct mlx5_esw_flow_attr *esw_attr; 1290 struct mlx5e_route_entry *r; 1291 struct mlx5e_route_key key; 1292 int err = 0; 1293 1294 esw_attr = attr->esw_attr; 1295 parse_attr = attr->parse_attr; 1296 mutex_lock(&esw->offloads.encap_tbl_lock); 1297 if (!esw_attr->rx_tun_attr) 1298 goto out; 1299 1300 tbl_time_before = mlx5e_route_tbl_get_last_update(priv); 1301 tbl_time_after = tbl_time_before; 1302 err = mlx5e_tc_tun_route_lookup(priv, &parse_attr->spec, attr, parse_attr->filter_dev); 1303 if (err || !esw_attr->rx_tun_attr->decap_vport) 1304 goto out; 1305 1306 key.ip_version = attr->tun_ip_version; 1307 if (key.ip_version == 4) 1308 key.endpoint_ip.v4 = esw_attr->rx_tun_attr->dst_ip.v4; 1309 else 1310 key.endpoint_ip.v6 = esw_attr->rx_tun_attr->dst_ip.v6; 1311 1312 r = mlx5e_route_get_create(priv, &key, parse_attr->filter_dev->ifindex, 1313 &tbl_time_after); 1314 if (IS_ERR(r)) { 1315 err = PTR_ERR(r); 1316 goto out; 1317 } 1318 /* Routing changed concurrently. FIB event handler might have missed new 1319 * entry, schedule update. 1320 */ 1321 if (tbl_time_before != tbl_time_after) { 1322 err = mlx5e_route_enqueue_update(priv, r, FIB_EVENT_ENTRY_REPLACE); 1323 if (err) { 1324 mlx5e_route_put_locked(priv, r); 1325 goto out; 1326 } 1327 } 1328 1329 flow->decap_route = r; 1330 list_add(&flow->decap_routes, &r->decap_flows); 1331 mutex_unlock(&esw->offloads.encap_tbl_lock); 1332 return 0; 1333 1334 out: 1335 mutex_unlock(&esw->offloads.encap_tbl_lock); 1336 return err; 1337 } 1338 1339 static int mlx5e_attach_encap_route(struct mlx5e_priv *priv, 1340 struct mlx5e_tc_flow *flow, 1341 struct mlx5_flow_attr *attr, 1342 struct mlx5e_encap_entry *e, 1343 bool new_encap_entry, 1344 unsigned long tbl_time_before, 1345 int out_index) 1346 { 1347 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 1348 unsigned long tbl_time_after = tbl_time_before; 1349 struct mlx5e_tc_flow_parse_attr *parse_attr; 1350 const struct ip_tunnel_info *tun_info; 1351 struct mlx5_esw_flow_attr *esw_attr; 1352 struct mlx5e_route_entry *r; 1353 struct mlx5e_route_key key; 1354 unsigned short family; 1355 int err = 0; 1356 1357 esw_attr = attr->esw_attr; 1358 parse_attr = attr->parse_attr; 1359 tun_info = parse_attr->tun_info[out_index]; 1360 family = ip_tunnel_info_af(tun_info); 1361 1362 if (family == AF_INET) { 1363 key.endpoint_ip.v4 = tun_info->key.u.ipv4.src; 1364 key.ip_version = 4; 1365 } else if (family == AF_INET6) { 1366 key.endpoint_ip.v6 = tun_info->key.u.ipv6.src; 1367 key.ip_version = 6; 1368 } 1369 1370 err = mlx5e_set_vf_tunnel(esw, attr, &parse_attr->mod_hdr_acts, e->out_dev, 1371 e->route_dev_ifindex, out_index); 1372 if (err || !(esw_attr->dests[out_index].flags & 1373 MLX5_ESW_DEST_CHAIN_WITH_SRC_PORT_CHANGE)) 1374 return err; 1375 1376 r = mlx5e_route_get_create(priv, &key, parse_attr->mirred_ifindex[out_index], 1377 &tbl_time_after); 1378 if (IS_ERR(r)) 1379 return PTR_ERR(r); 1380 /* Routing changed concurrently. FIB event handler might have missed new 1381 * entry, schedule update. 1382 */ 1383 if (tbl_time_before != tbl_time_after) { 1384 err = mlx5e_route_enqueue_update(priv, r, FIB_EVENT_ENTRY_REPLACE); 1385 if (err) { 1386 mlx5e_route_put_locked(priv, r); 1387 return err; 1388 } 1389 } 1390 1391 flow->encap_routes[out_index].r = r; 1392 if (new_encap_entry) 1393 list_add(&e->route_list, &r->encap_entries); 1394 flow->encap_routes[out_index].index = out_index; 1395 return 0; 1396 } 1397 1398 void mlx5e_detach_decap_route(struct mlx5e_priv *priv, 1399 struct mlx5e_tc_flow *flow) 1400 { 1401 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 1402 struct mlx5e_route_entry *r = flow->decap_route; 1403 1404 if (!r) 1405 return; 1406 1407 mutex_lock(&esw->offloads.encap_tbl_lock); 1408 list_del(&flow->decap_routes); 1409 flow->decap_route = NULL; 1410 1411 if (!refcount_dec_and_test(&r->refcnt)) { 1412 mutex_unlock(&esw->offloads.encap_tbl_lock); 1413 return; 1414 } 1415 hash_del_rcu(&r->hlist); 1416 mutex_unlock(&esw->offloads.encap_tbl_lock); 1417 1418 mlx5e_route_dealloc(priv, r); 1419 } 1420 1421 static void mlx5e_detach_encap_route(struct mlx5e_priv *priv, 1422 struct mlx5e_tc_flow *flow, 1423 int out_index) 1424 { 1425 struct mlx5e_route_entry *r = flow->encap_routes[out_index].r; 1426 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 1427 struct mlx5e_encap_entry *e, *tmp; 1428 1429 if (!r) 1430 return; 1431 1432 mutex_lock(&esw->offloads.encap_tbl_lock); 1433 flow->encap_routes[out_index].r = NULL; 1434 1435 if (!refcount_dec_and_test(&r->refcnt)) { 1436 mutex_unlock(&esw->offloads.encap_tbl_lock); 1437 return; 1438 } 1439 list_for_each_entry_safe(e, tmp, &r->encap_entries, route_list) 1440 list_del_init(&e->route_list); 1441 hash_del_rcu(&r->hlist); 1442 mutex_unlock(&esw->offloads.encap_tbl_lock); 1443 1444 mlx5e_route_dealloc(priv, r); 1445 } 1446 1447 static void mlx5e_invalidate_encap(struct mlx5e_priv *priv, 1448 struct mlx5e_encap_entry *e, 1449 struct list_head *encap_flows) 1450 { 1451 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 1452 struct mlx5e_tc_flow *flow; 1453 1454 list_for_each_entry(flow, encap_flows, tmp_list) { 1455 struct mlx5_esw_flow_attr *esw_attr; 1456 struct mlx5_flow_attr *attr; 1457 1458 if (!mlx5e_is_offloaded_flow(flow)) 1459 continue; 1460 1461 attr = mlx5e_tc_get_encap_attr(flow); 1462 esw_attr = attr->esw_attr; 1463 1464 if (flow_flag_test(flow, SLOW)) 1465 mlx5e_tc_unoffload_from_slow_path(esw, flow); 1466 else 1467 mlx5e_tc_unoffload_fdb_rules(esw, flow, flow->attr); 1468 1469 mlx5e_tc_detach_mod_hdr(priv, flow, attr); 1470 attr->modify_hdr = NULL; 1471 1472 esw_attr->dests[flow->tmp_entry_index].flags &= 1473 ~MLX5_ESW_DEST_ENCAP_VALID; 1474 esw_attr->dests[flow->tmp_entry_index].pkt_reformat = NULL; 1475 } 1476 1477 e->flags |= MLX5_ENCAP_ENTRY_NO_ROUTE; 1478 if (e->flags & MLX5_ENCAP_ENTRY_VALID) { 1479 e->flags &= ~MLX5_ENCAP_ENTRY_VALID; 1480 mlx5_packet_reformat_dealloc(priv->mdev, e->pkt_reformat); 1481 e->pkt_reformat = NULL; 1482 } 1483 } 1484 1485 static void mlx5e_reoffload_encap(struct mlx5e_priv *priv, 1486 struct net_device *tunnel_dev, 1487 struct mlx5e_encap_entry *e, 1488 struct list_head *encap_flows) 1489 { 1490 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 1491 struct mlx5e_tc_flow *flow; 1492 int err; 1493 1494 err = ip_tunnel_info_af(e->tun_info) == AF_INET ? 1495 mlx5e_tc_tun_update_header_ipv4(priv, tunnel_dev, e) : 1496 mlx5e_tc_tun_update_header_ipv6(priv, tunnel_dev, e); 1497 if (err) 1498 mlx5_core_warn(priv->mdev, "Failed to update encap header, %d", err); 1499 e->flags &= ~MLX5_ENCAP_ENTRY_NO_ROUTE; 1500 1501 list_for_each_entry(flow, encap_flows, tmp_list) { 1502 struct mlx5e_tc_flow_parse_attr *parse_attr; 1503 struct mlx5_esw_flow_attr *esw_attr; 1504 struct mlx5_flow_handle *rule; 1505 struct mlx5_flow_attr *attr; 1506 struct mlx5_flow_spec *spec; 1507 1508 if (flow_flag_test(flow, FAILED)) 1509 continue; 1510 1511 spec = &flow->attr->parse_attr->spec; 1512 1513 attr = mlx5e_tc_get_encap_attr(flow); 1514 esw_attr = attr->esw_attr; 1515 parse_attr = attr->parse_attr; 1516 1517 err = mlx5e_update_vf_tunnel(esw, esw_attr, &parse_attr->mod_hdr_acts, 1518 e->out_dev, e->route_dev_ifindex, 1519 flow->tmp_entry_index); 1520 if (err) { 1521 mlx5_core_warn(priv->mdev, "Failed to update VF tunnel err=%d", err); 1522 continue; 1523 } 1524 1525 err = mlx5e_tc_attach_mod_hdr(priv, flow, attr); 1526 if (err) { 1527 mlx5_core_warn(priv->mdev, "Failed to update flow mod_hdr err=%d", 1528 err); 1529 continue; 1530 } 1531 1532 if (e->flags & MLX5_ENCAP_ENTRY_VALID) { 1533 esw_attr->dests[flow->tmp_entry_index].pkt_reformat = e->pkt_reformat; 1534 esw_attr->dests[flow->tmp_entry_index].flags |= MLX5_ESW_DEST_ENCAP_VALID; 1535 if (!mlx5e_tc_flow_all_encaps_valid(esw_attr)) 1536 goto offload_to_slow_path; 1537 1538 err = mlx5e_tc_offload_flow_post_acts(flow); 1539 if (err) { 1540 mlx5_core_warn(priv->mdev, "Failed to update flow post acts, %d\n", 1541 err); 1542 goto offload_to_slow_path; 1543 } 1544 1545 /* update from slow path rule to encap rule */ 1546 rule = mlx5e_tc_offload_fdb_rules(esw, flow, spec, flow->attr); 1547 if (IS_ERR(rule)) { 1548 mlx5e_tc_unoffload_flow_post_acts(flow); 1549 err = PTR_ERR(rule); 1550 mlx5_core_warn(priv->mdev, "Failed to update cached encapsulation flow, %d\n", 1551 err); 1552 } else { 1553 flow->rule[0] = rule; 1554 } 1555 } else { 1556 offload_to_slow_path: 1557 rule = mlx5e_tc_offload_to_slow_path(esw, flow, spec); 1558 /* mark the flow's encap dest as non-valid */ 1559 esw_attr->dests[flow->tmp_entry_index].flags &= 1560 ~MLX5_ESW_DEST_ENCAP_VALID; 1561 1562 if (IS_ERR(rule)) { 1563 err = PTR_ERR(rule); 1564 mlx5_core_warn(priv->mdev, "Failed to update slow path (encap) flow, %d\n", 1565 err); 1566 } else { 1567 flow->rule[0] = rule; 1568 } 1569 } 1570 flow_flag_set(flow, OFFLOADED); 1571 } 1572 } 1573 1574 static int mlx5e_update_route_encaps(struct mlx5e_priv *priv, 1575 struct mlx5e_route_entry *r, 1576 struct list_head *flow_list, 1577 bool replace) 1578 { 1579 struct net_device *tunnel_dev; 1580 struct mlx5e_encap_entry *e; 1581 1582 tunnel_dev = __dev_get_by_index(dev_net(priv->netdev), r->tunnel_dev_index); 1583 if (!tunnel_dev) 1584 return -ENODEV; 1585 1586 list_for_each_entry(e, &r->encap_entries, route_list) { 1587 LIST_HEAD(encap_flows); 1588 1589 mlx5e_take_all_encap_flows(e, &encap_flows); 1590 if (list_empty(&encap_flows)) 1591 continue; 1592 1593 if (mlx5e_route_entry_valid(r)) 1594 mlx5e_invalidate_encap(priv, e, &encap_flows); 1595 1596 if (!replace) { 1597 list_splice(&encap_flows, flow_list); 1598 continue; 1599 } 1600 1601 mlx5e_reoffload_encap(priv, tunnel_dev, e, &encap_flows); 1602 list_splice(&encap_flows, flow_list); 1603 } 1604 1605 return 0; 1606 } 1607 1608 static void mlx5e_unoffload_flow_list(struct mlx5e_priv *priv, 1609 struct list_head *flow_list) 1610 { 1611 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 1612 struct mlx5e_tc_flow *flow; 1613 1614 list_for_each_entry(flow, flow_list, tmp_list) 1615 if (mlx5e_is_offloaded_flow(flow)) 1616 mlx5e_tc_unoffload_fdb_rules(esw, flow, flow->attr); 1617 } 1618 1619 static void mlx5e_reoffload_decap(struct mlx5e_priv *priv, 1620 struct list_head *decap_flows) 1621 { 1622 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch; 1623 struct mlx5e_tc_flow *flow; 1624 1625 list_for_each_entry(flow, decap_flows, tmp_list) { 1626 struct mlx5e_tc_flow_parse_attr *parse_attr; 1627 struct mlx5_flow_attr *attr = flow->attr; 1628 struct mlx5_flow_handle *rule; 1629 struct mlx5_flow_spec *spec; 1630 int err; 1631 1632 if (flow_flag_test(flow, FAILED)) 1633 continue; 1634 1635 parse_attr = attr->parse_attr; 1636 spec = &parse_attr->spec; 1637 err = mlx5e_tc_tun_route_lookup(priv, spec, attr, parse_attr->filter_dev); 1638 if (err) { 1639 mlx5_core_warn(priv->mdev, "Failed to lookup route for flow, %d\n", 1640 err); 1641 continue; 1642 } 1643 1644 rule = mlx5e_tc_offload_fdb_rules(esw, flow, spec, attr); 1645 if (IS_ERR(rule)) { 1646 err = PTR_ERR(rule); 1647 mlx5_core_warn(priv->mdev, "Failed to update cached decap flow, %d\n", 1648 err); 1649 } else { 1650 flow->rule[0] = rule; 1651 flow_flag_set(flow, OFFLOADED); 1652 } 1653 } 1654 } 1655 1656 static int mlx5e_update_route_decap_flows(struct mlx5e_priv *priv, 1657 struct mlx5e_route_entry *r, 1658 struct list_head *flow_list, 1659 bool replace) 1660 { 1661 struct net_device *tunnel_dev; 1662 LIST_HEAD(decap_flows); 1663 1664 tunnel_dev = __dev_get_by_index(dev_net(priv->netdev), r->tunnel_dev_index); 1665 if (!tunnel_dev) 1666 return -ENODEV; 1667 1668 mlx5e_take_all_route_decap_flows(r, &decap_flows); 1669 if (mlx5e_route_entry_valid(r)) 1670 mlx5e_unoffload_flow_list(priv, &decap_flows); 1671 if (replace) 1672 mlx5e_reoffload_decap(priv, &decap_flows); 1673 1674 list_splice(&decap_flows, flow_list); 1675 1676 return 0; 1677 } 1678 1679 static void mlx5e_tc_fib_event_work(struct work_struct *work) 1680 { 1681 struct mlx5e_tc_fib_event_data *event_data = 1682 container_of(work, struct mlx5e_tc_fib_event_data, work); 1683 struct net_device *ul_dev = event_data->ul_dev; 1684 struct mlx5e_priv *priv = netdev_priv(ul_dev); 1685 struct mlx5e_route_entry *r = event_data->r; 1686 struct mlx5_eswitch *esw; 1687 LIST_HEAD(flow_list); 1688 bool replace; 1689 int err; 1690 1691 /* sync with concurrent neigh updates */ 1692 rtnl_lock(); 1693 esw = priv->mdev->priv.eswitch; 1694 mutex_lock(&esw->offloads.encap_tbl_lock); 1695 replace = event_data->event == FIB_EVENT_ENTRY_REPLACE; 1696 1697 if (!mlx5e_route_entry_valid(r) && !replace) 1698 goto out; 1699 1700 err = mlx5e_update_route_encaps(priv, r, &flow_list, replace); 1701 if (err) 1702 mlx5_core_warn(priv->mdev, "Failed to update route encaps, %d\n", 1703 err); 1704 1705 err = mlx5e_update_route_decap_flows(priv, r, &flow_list, replace); 1706 if (err) 1707 mlx5_core_warn(priv->mdev, "Failed to update route decap flows, %d\n", 1708 err); 1709 1710 if (replace) 1711 r->flags |= MLX5E_ROUTE_ENTRY_VALID; 1712 out: 1713 mutex_unlock(&esw->offloads.encap_tbl_lock); 1714 rtnl_unlock(); 1715 1716 mlx5e_put_flow_list(priv, &flow_list); 1717 mlx5e_route_put(priv, event_data->r); 1718 dev_put(event_data->ul_dev); 1719 kfree(event_data); 1720 } 1721 1722 static struct mlx5e_tc_fib_event_data * 1723 mlx5e_init_fib_work_ipv4(struct mlx5e_priv *priv, 1724 struct net_device *ul_dev, 1725 struct mlx5e_tc_tun_encap *encap, 1726 unsigned long event, 1727 struct fib_notifier_info *info) 1728 { 1729 struct fib_entry_notifier_info *fen_info; 1730 struct mlx5e_tc_fib_event_data *fib_work; 1731 struct mlx5e_route_entry *r; 1732 struct mlx5e_route_key key; 1733 struct net_device *fib_dev; 1734 1735 fen_info = container_of(info, struct fib_entry_notifier_info, info); 1736 if (fen_info->fi->nh) 1737 return NULL; 1738 fib_dev = fib_info_nh(fen_info->fi, 0)->fib_nh_dev; 1739 if (!fib_dev || fib_dev->netdev_ops != &mlx5e_netdev_ops || 1740 fen_info->dst_len != 32) 1741 return NULL; 1742 1743 fib_work = mlx5e_tc_init_fib_work(event, ul_dev, GFP_ATOMIC); 1744 if (!fib_work) 1745 return ERR_PTR(-ENOMEM); 1746 1747 key.endpoint_ip.v4 = htonl(fen_info->dst); 1748 key.ip_version = 4; 1749 1750 /* Can't fail after this point because releasing reference to r 1751 * requires obtaining sleeping mutex which we can't do in atomic 1752 * context. 1753 */ 1754 r = mlx5e_route_lookup_for_update(encap, &key); 1755 if (!r) 1756 goto out; 1757 fib_work->r = r; 1758 dev_hold(ul_dev); 1759 1760 return fib_work; 1761 1762 out: 1763 kfree(fib_work); 1764 return NULL; 1765 } 1766 1767 static struct mlx5e_tc_fib_event_data * 1768 mlx5e_init_fib_work_ipv6(struct mlx5e_priv *priv, 1769 struct net_device *ul_dev, 1770 struct mlx5e_tc_tun_encap *encap, 1771 unsigned long event, 1772 struct fib_notifier_info *info) 1773 { 1774 struct fib6_entry_notifier_info *fen_info; 1775 struct mlx5e_tc_fib_event_data *fib_work; 1776 struct mlx5e_route_entry *r; 1777 struct mlx5e_route_key key; 1778 struct net_device *fib_dev; 1779 1780 fen_info = container_of(info, struct fib6_entry_notifier_info, info); 1781 fib_dev = fib6_info_nh_dev(fen_info->rt); 1782 if (fib_dev->netdev_ops != &mlx5e_netdev_ops || 1783 fen_info->rt->fib6_dst.plen != 128) 1784 return NULL; 1785 1786 fib_work = mlx5e_tc_init_fib_work(event, ul_dev, GFP_ATOMIC); 1787 if (!fib_work) 1788 return ERR_PTR(-ENOMEM); 1789 1790 memcpy(&key.endpoint_ip.v6, &fen_info->rt->fib6_dst.addr, 1791 sizeof(fen_info->rt->fib6_dst.addr)); 1792 key.ip_version = 6; 1793 1794 /* Can't fail after this point because releasing reference to r 1795 * requires obtaining sleeping mutex which we can't do in atomic 1796 * context. 1797 */ 1798 r = mlx5e_route_lookup_for_update(encap, &key); 1799 if (!r) 1800 goto out; 1801 fib_work->r = r; 1802 dev_hold(ul_dev); 1803 1804 return fib_work; 1805 1806 out: 1807 kfree(fib_work); 1808 return NULL; 1809 } 1810 1811 static int mlx5e_tc_tun_fib_event(struct notifier_block *nb, unsigned long event, void *ptr) 1812 { 1813 struct mlx5e_tc_fib_event_data *fib_work; 1814 struct fib_notifier_info *info = ptr; 1815 struct mlx5e_tc_tun_encap *encap; 1816 struct net_device *ul_dev; 1817 struct mlx5e_priv *priv; 1818 1819 encap = container_of(nb, struct mlx5e_tc_tun_encap, fib_nb); 1820 priv = encap->priv; 1821 ul_dev = priv->netdev; 1822 priv = netdev_priv(ul_dev); 1823 1824 switch (event) { 1825 case FIB_EVENT_ENTRY_REPLACE: 1826 case FIB_EVENT_ENTRY_DEL: 1827 if (info->family == AF_INET) 1828 fib_work = mlx5e_init_fib_work_ipv4(priv, ul_dev, encap, event, info); 1829 else if (info->family == AF_INET6) 1830 fib_work = mlx5e_init_fib_work_ipv6(priv, ul_dev, encap, event, info); 1831 else 1832 return NOTIFY_DONE; 1833 1834 if (!IS_ERR_OR_NULL(fib_work)) { 1835 queue_work(priv->wq, &fib_work->work); 1836 } else if (IS_ERR(fib_work)) { 1837 NL_SET_ERR_MSG_MOD(info->extack, "Failed to init fib work"); 1838 mlx5_core_warn(priv->mdev, "Failed to init fib work, %ld\n", 1839 PTR_ERR(fib_work)); 1840 } 1841 1842 break; 1843 default: 1844 return NOTIFY_DONE; 1845 } 1846 1847 return NOTIFY_DONE; 1848 } 1849 1850 struct mlx5e_tc_tun_encap *mlx5e_tc_tun_init(struct mlx5e_priv *priv) 1851 { 1852 struct mlx5e_tc_tun_encap *encap; 1853 int err; 1854 1855 encap = kvzalloc(sizeof(*encap), GFP_KERNEL); 1856 if (!encap) 1857 return ERR_PTR(-ENOMEM); 1858 1859 encap->priv = priv; 1860 encap->fib_nb.notifier_call = mlx5e_tc_tun_fib_event; 1861 spin_lock_init(&encap->route_lock); 1862 hash_init(encap->route_tbl); 1863 err = register_fib_notifier(dev_net(priv->netdev), &encap->fib_nb, 1864 NULL, NULL); 1865 if (err) { 1866 kvfree(encap); 1867 return ERR_PTR(err); 1868 } 1869 1870 return encap; 1871 } 1872 1873 void mlx5e_tc_tun_cleanup(struct mlx5e_tc_tun_encap *encap) 1874 { 1875 if (!encap) 1876 return; 1877 1878 unregister_fib_notifier(dev_net(encap->priv->netdev), &encap->fib_nb); 1879 flush_workqueue(encap->priv->wq); /* flush fib event works */ 1880 kvfree(encap); 1881 } 1882