1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 2 /* Copyright (c) 2016-2018 Mellanox Technologies. All rights reserved */ 3 4 #include <linux/kernel.h> 5 #include <linux/types.h> 6 #include <linux/rhashtable.h> 7 #include <linux/bitops.h> 8 #include <linux/in6.h> 9 #include <linux/notifier.h> 10 #include <linux/inetdevice.h> 11 #include <linux/netdevice.h> 12 #include <linux/if_bridge.h> 13 #include <linux/socket.h> 14 #include <linux/route.h> 15 #include <linux/gcd.h> 16 #include <linux/if_macvlan.h> 17 #include <linux/refcount.h> 18 #include <linux/jhash.h> 19 #include <linux/net_namespace.h> 20 #include <net/netevent.h> 21 #include <net/neighbour.h> 22 #include <net/arp.h> 23 #include <net/ip_fib.h> 24 #include <net/ip6_fib.h> 25 #include <net/nexthop.h> 26 #include <net/fib_rules.h> 27 #include <net/ip_tunnels.h> 28 #include <net/l3mdev.h> 29 #include <net/addrconf.h> 30 #include <net/ndisc.h> 31 #include <net/ipv6.h> 32 #include <net/fib_notifier.h> 33 #include <net/switchdev.h> 34 35 #include "spectrum.h" 36 #include "core.h" 37 #include "reg.h" 38 #include "spectrum_cnt.h" 39 #include "spectrum_dpipe.h" 40 #include "spectrum_ipip.h" 41 #include "spectrum_mr.h" 42 #include "spectrum_mr_tcam.h" 43 #include "spectrum_router.h" 44 #include "spectrum_span.h" 45 46 struct mlxsw_sp_fib; 47 struct mlxsw_sp_vr; 48 struct mlxsw_sp_lpm_tree; 49 struct mlxsw_sp_rif_ops; 50 51 struct mlxsw_sp_router { 52 struct mlxsw_sp *mlxsw_sp; 53 struct mlxsw_sp_rif **rifs; 54 struct mlxsw_sp_vr *vrs; 55 struct rhashtable neigh_ht; 56 struct rhashtable nexthop_group_ht; 57 struct rhashtable nexthop_ht; 58 struct list_head nexthop_list; 59 struct { 60 /* One tree for each protocol: IPv4 and IPv6 */ 61 struct mlxsw_sp_lpm_tree *proto_trees[2]; 62 struct mlxsw_sp_lpm_tree *trees; 63 unsigned int tree_count; 64 } lpm; 65 struct { 66 struct delayed_work dw; 67 unsigned long interval; /* ms */ 68 } neighs_update; 69 struct delayed_work nexthop_probe_dw; 70 #define MLXSW_SP_UNRESOLVED_NH_PROBE_INTERVAL 5000 /* ms */ 71 struct list_head nexthop_neighs_list; 72 struct list_head ipip_list; 73 bool aborted; 74 struct notifier_block fib_nb; 75 struct notifier_block netevent_nb; 76 struct notifier_block inetaddr_nb; 77 struct notifier_block inet6addr_nb; 78 const struct mlxsw_sp_rif_ops **rif_ops_arr; 79 const struct mlxsw_sp_ipip_ops **ipip_ops_arr; 80 u32 adj_discard_index; 81 bool adj_discard_index_valid; 82 }; 83 84 struct mlxsw_sp_rif { 85 struct list_head nexthop_list; 86 struct list_head neigh_list; 87 struct net_device *dev; /* NULL for underlay RIF */ 88 struct mlxsw_sp_fid *fid; 89 unsigned char addr[ETH_ALEN]; 90 int mtu; 91 u16 rif_index; 92 u16 vr_id; 93 const struct mlxsw_sp_rif_ops *ops; 94 struct mlxsw_sp *mlxsw_sp; 95 96 unsigned int counter_ingress; 97 bool counter_ingress_valid; 98 unsigned int counter_egress; 99 bool counter_egress_valid; 100 }; 101 102 struct mlxsw_sp_rif_params { 103 struct net_device *dev; 104 union { 105 u16 system_port; 106 u16 lag_id; 107 }; 108 u16 vid; 109 bool lag; 110 }; 111 112 struct mlxsw_sp_rif_subport { 113 struct mlxsw_sp_rif common; 114 refcount_t ref_count; 115 union { 116 u16 system_port; 117 u16 lag_id; 118 }; 119 u16 vid; 120 bool lag; 121 }; 122 123 struct mlxsw_sp_rif_ipip_lb { 124 struct mlxsw_sp_rif common; 125 struct mlxsw_sp_rif_ipip_lb_config lb_config; 126 u16 ul_vr_id; /* Reserved for Spectrum-2. */ 127 u16 ul_rif_id; /* Reserved for Spectrum. */ 128 }; 129 130 struct mlxsw_sp_rif_params_ipip_lb { 131 struct mlxsw_sp_rif_params common; 132 struct mlxsw_sp_rif_ipip_lb_config lb_config; 133 }; 134 135 struct mlxsw_sp_rif_ops { 136 enum mlxsw_sp_rif_type type; 137 size_t rif_size; 138 139 void (*setup)(struct mlxsw_sp_rif *rif, 140 const struct mlxsw_sp_rif_params *params); 141 int (*configure)(struct mlxsw_sp_rif *rif); 142 void (*deconfigure)(struct mlxsw_sp_rif *rif); 143 struct mlxsw_sp_fid * (*fid_get)(struct mlxsw_sp_rif *rif, 144 struct netlink_ext_ack *extack); 145 void (*fdb_del)(struct mlxsw_sp_rif *rif, const char *mac); 146 }; 147 148 static void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif); 149 static void mlxsw_sp_lpm_tree_hold(struct mlxsw_sp_lpm_tree *lpm_tree); 150 static void mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp, 151 struct mlxsw_sp_lpm_tree *lpm_tree); 152 static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp, 153 const struct mlxsw_sp_fib *fib, 154 u8 tree_id); 155 static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp, 156 const struct mlxsw_sp_fib *fib); 157 158 static unsigned int * 159 mlxsw_sp_rif_p_counter_get(struct mlxsw_sp_rif *rif, 160 enum mlxsw_sp_rif_counter_dir dir) 161 { 162 switch (dir) { 163 case MLXSW_SP_RIF_COUNTER_EGRESS: 164 return &rif->counter_egress; 165 case MLXSW_SP_RIF_COUNTER_INGRESS: 166 return &rif->counter_ingress; 167 } 168 return NULL; 169 } 170 171 static bool 172 mlxsw_sp_rif_counter_valid_get(struct mlxsw_sp_rif *rif, 173 enum mlxsw_sp_rif_counter_dir dir) 174 { 175 switch (dir) { 176 case MLXSW_SP_RIF_COUNTER_EGRESS: 177 return rif->counter_egress_valid; 178 case MLXSW_SP_RIF_COUNTER_INGRESS: 179 return rif->counter_ingress_valid; 180 } 181 return false; 182 } 183 184 static void 185 mlxsw_sp_rif_counter_valid_set(struct mlxsw_sp_rif *rif, 186 enum mlxsw_sp_rif_counter_dir dir, 187 bool valid) 188 { 189 switch (dir) { 190 case MLXSW_SP_RIF_COUNTER_EGRESS: 191 rif->counter_egress_valid = valid; 192 break; 193 case MLXSW_SP_RIF_COUNTER_INGRESS: 194 rif->counter_ingress_valid = valid; 195 break; 196 } 197 } 198 199 static int mlxsw_sp_rif_counter_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index, 200 unsigned int counter_index, bool enable, 201 enum mlxsw_sp_rif_counter_dir dir) 202 { 203 char ritr_pl[MLXSW_REG_RITR_LEN]; 204 bool is_egress = false; 205 int err; 206 207 if (dir == MLXSW_SP_RIF_COUNTER_EGRESS) 208 is_egress = true; 209 mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index); 210 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 211 if (err) 212 return err; 213 214 mlxsw_reg_ritr_counter_pack(ritr_pl, counter_index, enable, 215 is_egress); 216 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 217 } 218 219 int mlxsw_sp_rif_counter_value_get(struct mlxsw_sp *mlxsw_sp, 220 struct mlxsw_sp_rif *rif, 221 enum mlxsw_sp_rif_counter_dir dir, u64 *cnt) 222 { 223 char ricnt_pl[MLXSW_REG_RICNT_LEN]; 224 unsigned int *p_counter_index; 225 bool valid; 226 int err; 227 228 valid = mlxsw_sp_rif_counter_valid_get(rif, dir); 229 if (!valid) 230 return -EINVAL; 231 232 p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); 233 if (!p_counter_index) 234 return -EINVAL; 235 mlxsw_reg_ricnt_pack(ricnt_pl, *p_counter_index, 236 MLXSW_REG_RICNT_OPCODE_NOP); 237 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl); 238 if (err) 239 return err; 240 *cnt = mlxsw_reg_ricnt_good_unicast_packets_get(ricnt_pl); 241 return 0; 242 } 243 244 static int mlxsw_sp_rif_counter_clear(struct mlxsw_sp *mlxsw_sp, 245 unsigned int counter_index) 246 { 247 char ricnt_pl[MLXSW_REG_RICNT_LEN]; 248 249 mlxsw_reg_ricnt_pack(ricnt_pl, counter_index, 250 MLXSW_REG_RICNT_OPCODE_CLEAR); 251 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl); 252 } 253 254 int mlxsw_sp_rif_counter_alloc(struct mlxsw_sp *mlxsw_sp, 255 struct mlxsw_sp_rif *rif, 256 enum mlxsw_sp_rif_counter_dir dir) 257 { 258 unsigned int *p_counter_index; 259 int err; 260 261 p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); 262 if (!p_counter_index) 263 return -EINVAL; 264 err = mlxsw_sp_counter_alloc(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF, 265 p_counter_index); 266 if (err) 267 return err; 268 269 err = mlxsw_sp_rif_counter_clear(mlxsw_sp, *p_counter_index); 270 if (err) 271 goto err_counter_clear; 272 273 err = mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index, 274 *p_counter_index, true, dir); 275 if (err) 276 goto err_counter_edit; 277 mlxsw_sp_rif_counter_valid_set(rif, dir, true); 278 return 0; 279 280 err_counter_edit: 281 err_counter_clear: 282 mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF, 283 *p_counter_index); 284 return err; 285 } 286 287 void mlxsw_sp_rif_counter_free(struct mlxsw_sp *mlxsw_sp, 288 struct mlxsw_sp_rif *rif, 289 enum mlxsw_sp_rif_counter_dir dir) 290 { 291 unsigned int *p_counter_index; 292 293 if (!mlxsw_sp_rif_counter_valid_get(rif, dir)) 294 return; 295 296 p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); 297 if (WARN_ON(!p_counter_index)) 298 return; 299 mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index, 300 *p_counter_index, false, dir); 301 mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF, 302 *p_counter_index); 303 mlxsw_sp_rif_counter_valid_set(rif, dir, false); 304 } 305 306 static void mlxsw_sp_rif_counters_alloc(struct mlxsw_sp_rif *rif) 307 { 308 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 309 struct devlink *devlink; 310 311 devlink = priv_to_devlink(mlxsw_sp->core); 312 if (!devlink_dpipe_table_counter_enabled(devlink, 313 MLXSW_SP_DPIPE_TABLE_NAME_ERIF)) 314 return; 315 mlxsw_sp_rif_counter_alloc(mlxsw_sp, rif, MLXSW_SP_RIF_COUNTER_EGRESS); 316 } 317 318 static void mlxsw_sp_rif_counters_free(struct mlxsw_sp_rif *rif) 319 { 320 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 321 322 mlxsw_sp_rif_counter_free(mlxsw_sp, rif, MLXSW_SP_RIF_COUNTER_EGRESS); 323 } 324 325 #define MLXSW_SP_PREFIX_COUNT (sizeof(struct in6_addr) * BITS_PER_BYTE + 1) 326 327 struct mlxsw_sp_prefix_usage { 328 DECLARE_BITMAP(b, MLXSW_SP_PREFIX_COUNT); 329 }; 330 331 #define mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) \ 332 for_each_set_bit(prefix, (prefix_usage)->b, MLXSW_SP_PREFIX_COUNT) 333 334 static bool 335 mlxsw_sp_prefix_usage_eq(struct mlxsw_sp_prefix_usage *prefix_usage1, 336 struct mlxsw_sp_prefix_usage *prefix_usage2) 337 { 338 return !memcmp(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1)); 339 } 340 341 static void 342 mlxsw_sp_prefix_usage_cpy(struct mlxsw_sp_prefix_usage *prefix_usage1, 343 struct mlxsw_sp_prefix_usage *prefix_usage2) 344 { 345 memcpy(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1)); 346 } 347 348 static void 349 mlxsw_sp_prefix_usage_set(struct mlxsw_sp_prefix_usage *prefix_usage, 350 unsigned char prefix_len) 351 { 352 set_bit(prefix_len, prefix_usage->b); 353 } 354 355 static void 356 mlxsw_sp_prefix_usage_clear(struct mlxsw_sp_prefix_usage *prefix_usage, 357 unsigned char prefix_len) 358 { 359 clear_bit(prefix_len, prefix_usage->b); 360 } 361 362 struct mlxsw_sp_fib_key { 363 unsigned char addr[sizeof(struct in6_addr)]; 364 unsigned char prefix_len; 365 }; 366 367 enum mlxsw_sp_fib_entry_type { 368 MLXSW_SP_FIB_ENTRY_TYPE_REMOTE, 369 MLXSW_SP_FIB_ENTRY_TYPE_LOCAL, 370 MLXSW_SP_FIB_ENTRY_TYPE_TRAP, 371 MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE, 372 MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE, 373 374 /* This is a special case of local delivery, where a packet should be 375 * decapsulated on reception. Note that there is no corresponding ENCAP, 376 * because that's a type of next hop, not of FIB entry. (There can be 377 * several next hops in a REMOTE entry, and some of them may be 378 * encapsulating entries.) 379 */ 380 MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP, 381 MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP, 382 }; 383 384 struct mlxsw_sp_nexthop_group; 385 386 struct mlxsw_sp_fib_node { 387 struct list_head entry_list; 388 struct list_head list; 389 struct rhash_head ht_node; 390 struct mlxsw_sp_fib *fib; 391 struct mlxsw_sp_fib_key key; 392 }; 393 394 struct mlxsw_sp_fib_entry_decap { 395 struct mlxsw_sp_ipip_entry *ipip_entry; 396 u32 tunnel_index; 397 }; 398 399 struct mlxsw_sp_fib_entry { 400 struct list_head list; 401 struct mlxsw_sp_fib_node *fib_node; 402 enum mlxsw_sp_fib_entry_type type; 403 struct list_head nexthop_group_node; 404 struct mlxsw_sp_nexthop_group *nh_group; 405 struct mlxsw_sp_fib_entry_decap decap; /* Valid for decap entries. */ 406 }; 407 408 struct mlxsw_sp_fib4_entry { 409 struct mlxsw_sp_fib_entry common; 410 u32 tb_id; 411 u32 prio; 412 u8 tos; 413 u8 type; 414 }; 415 416 struct mlxsw_sp_fib6_entry { 417 struct mlxsw_sp_fib_entry common; 418 struct list_head rt6_list; 419 unsigned int nrt6; 420 }; 421 422 struct mlxsw_sp_rt6 { 423 struct list_head list; 424 struct fib6_info *rt; 425 }; 426 427 struct mlxsw_sp_lpm_tree { 428 u8 id; /* tree ID */ 429 unsigned int ref_count; 430 enum mlxsw_sp_l3proto proto; 431 unsigned long prefix_ref_count[MLXSW_SP_PREFIX_COUNT]; 432 struct mlxsw_sp_prefix_usage prefix_usage; 433 }; 434 435 struct mlxsw_sp_fib { 436 struct rhashtable ht; 437 struct list_head node_list; 438 struct mlxsw_sp_vr *vr; 439 struct mlxsw_sp_lpm_tree *lpm_tree; 440 enum mlxsw_sp_l3proto proto; 441 }; 442 443 struct mlxsw_sp_vr { 444 u16 id; /* virtual router ID */ 445 u32 tb_id; /* kernel fib table id */ 446 unsigned int rif_count; 447 struct mlxsw_sp_fib *fib4; 448 struct mlxsw_sp_fib *fib6; 449 struct mlxsw_sp_mr_table *mr_table[MLXSW_SP_L3_PROTO_MAX]; 450 struct mlxsw_sp_rif *ul_rif; 451 refcount_t ul_rif_refcnt; 452 }; 453 454 static const struct rhashtable_params mlxsw_sp_fib_ht_params; 455 456 static struct mlxsw_sp_fib *mlxsw_sp_fib_create(struct mlxsw_sp *mlxsw_sp, 457 struct mlxsw_sp_vr *vr, 458 enum mlxsw_sp_l3proto proto) 459 { 460 struct mlxsw_sp_lpm_tree *lpm_tree; 461 struct mlxsw_sp_fib *fib; 462 int err; 463 464 lpm_tree = mlxsw_sp->router->lpm.proto_trees[proto]; 465 fib = kzalloc(sizeof(*fib), GFP_KERNEL); 466 if (!fib) 467 return ERR_PTR(-ENOMEM); 468 err = rhashtable_init(&fib->ht, &mlxsw_sp_fib_ht_params); 469 if (err) 470 goto err_rhashtable_init; 471 INIT_LIST_HEAD(&fib->node_list); 472 fib->proto = proto; 473 fib->vr = vr; 474 fib->lpm_tree = lpm_tree; 475 mlxsw_sp_lpm_tree_hold(lpm_tree); 476 err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib, lpm_tree->id); 477 if (err) 478 goto err_lpm_tree_bind; 479 return fib; 480 481 err_lpm_tree_bind: 482 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 483 err_rhashtable_init: 484 kfree(fib); 485 return ERR_PTR(err); 486 } 487 488 static void mlxsw_sp_fib_destroy(struct mlxsw_sp *mlxsw_sp, 489 struct mlxsw_sp_fib *fib) 490 { 491 mlxsw_sp_vr_lpm_tree_unbind(mlxsw_sp, fib); 492 mlxsw_sp_lpm_tree_put(mlxsw_sp, fib->lpm_tree); 493 WARN_ON(!list_empty(&fib->node_list)); 494 rhashtable_destroy(&fib->ht); 495 kfree(fib); 496 } 497 498 static struct mlxsw_sp_lpm_tree * 499 mlxsw_sp_lpm_tree_find_unused(struct mlxsw_sp *mlxsw_sp) 500 { 501 static struct mlxsw_sp_lpm_tree *lpm_tree; 502 int i; 503 504 for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) { 505 lpm_tree = &mlxsw_sp->router->lpm.trees[i]; 506 if (lpm_tree->ref_count == 0) 507 return lpm_tree; 508 } 509 return NULL; 510 } 511 512 static int mlxsw_sp_lpm_tree_alloc(struct mlxsw_sp *mlxsw_sp, 513 struct mlxsw_sp_lpm_tree *lpm_tree) 514 { 515 char ralta_pl[MLXSW_REG_RALTA_LEN]; 516 517 mlxsw_reg_ralta_pack(ralta_pl, true, 518 (enum mlxsw_reg_ralxx_protocol) lpm_tree->proto, 519 lpm_tree->id); 520 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); 521 } 522 523 static void mlxsw_sp_lpm_tree_free(struct mlxsw_sp *mlxsw_sp, 524 struct mlxsw_sp_lpm_tree *lpm_tree) 525 { 526 char ralta_pl[MLXSW_REG_RALTA_LEN]; 527 528 mlxsw_reg_ralta_pack(ralta_pl, false, 529 (enum mlxsw_reg_ralxx_protocol) lpm_tree->proto, 530 lpm_tree->id); 531 mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); 532 } 533 534 static int 535 mlxsw_sp_lpm_tree_left_struct_set(struct mlxsw_sp *mlxsw_sp, 536 struct mlxsw_sp_prefix_usage *prefix_usage, 537 struct mlxsw_sp_lpm_tree *lpm_tree) 538 { 539 char ralst_pl[MLXSW_REG_RALST_LEN]; 540 u8 root_bin = 0; 541 u8 prefix; 542 u8 last_prefix = MLXSW_REG_RALST_BIN_NO_CHILD; 543 544 mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) 545 root_bin = prefix; 546 547 mlxsw_reg_ralst_pack(ralst_pl, root_bin, lpm_tree->id); 548 mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) { 549 if (prefix == 0) 550 continue; 551 mlxsw_reg_ralst_bin_pack(ralst_pl, prefix, last_prefix, 552 MLXSW_REG_RALST_BIN_NO_CHILD); 553 last_prefix = prefix; 554 } 555 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl); 556 } 557 558 static struct mlxsw_sp_lpm_tree * 559 mlxsw_sp_lpm_tree_create(struct mlxsw_sp *mlxsw_sp, 560 struct mlxsw_sp_prefix_usage *prefix_usage, 561 enum mlxsw_sp_l3proto proto) 562 { 563 struct mlxsw_sp_lpm_tree *lpm_tree; 564 int err; 565 566 lpm_tree = mlxsw_sp_lpm_tree_find_unused(mlxsw_sp); 567 if (!lpm_tree) 568 return ERR_PTR(-EBUSY); 569 lpm_tree->proto = proto; 570 err = mlxsw_sp_lpm_tree_alloc(mlxsw_sp, lpm_tree); 571 if (err) 572 return ERR_PTR(err); 573 574 err = mlxsw_sp_lpm_tree_left_struct_set(mlxsw_sp, prefix_usage, 575 lpm_tree); 576 if (err) 577 goto err_left_struct_set; 578 memcpy(&lpm_tree->prefix_usage, prefix_usage, 579 sizeof(lpm_tree->prefix_usage)); 580 memset(&lpm_tree->prefix_ref_count, 0, 581 sizeof(lpm_tree->prefix_ref_count)); 582 lpm_tree->ref_count = 1; 583 return lpm_tree; 584 585 err_left_struct_set: 586 mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree); 587 return ERR_PTR(err); 588 } 589 590 static void mlxsw_sp_lpm_tree_destroy(struct mlxsw_sp *mlxsw_sp, 591 struct mlxsw_sp_lpm_tree *lpm_tree) 592 { 593 mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree); 594 } 595 596 static struct mlxsw_sp_lpm_tree * 597 mlxsw_sp_lpm_tree_get(struct mlxsw_sp *mlxsw_sp, 598 struct mlxsw_sp_prefix_usage *prefix_usage, 599 enum mlxsw_sp_l3proto proto) 600 { 601 struct mlxsw_sp_lpm_tree *lpm_tree; 602 int i; 603 604 for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) { 605 lpm_tree = &mlxsw_sp->router->lpm.trees[i]; 606 if (lpm_tree->ref_count != 0 && 607 lpm_tree->proto == proto && 608 mlxsw_sp_prefix_usage_eq(&lpm_tree->prefix_usage, 609 prefix_usage)) { 610 mlxsw_sp_lpm_tree_hold(lpm_tree); 611 return lpm_tree; 612 } 613 } 614 return mlxsw_sp_lpm_tree_create(mlxsw_sp, prefix_usage, proto); 615 } 616 617 static void mlxsw_sp_lpm_tree_hold(struct mlxsw_sp_lpm_tree *lpm_tree) 618 { 619 lpm_tree->ref_count++; 620 } 621 622 static void mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp, 623 struct mlxsw_sp_lpm_tree *lpm_tree) 624 { 625 if (--lpm_tree->ref_count == 0) 626 mlxsw_sp_lpm_tree_destroy(mlxsw_sp, lpm_tree); 627 } 628 629 #define MLXSW_SP_LPM_TREE_MIN 1 /* tree 0 is reserved */ 630 631 static int mlxsw_sp_lpm_init(struct mlxsw_sp *mlxsw_sp) 632 { 633 struct mlxsw_sp_prefix_usage req_prefix_usage = {{ 0 } }; 634 struct mlxsw_sp_lpm_tree *lpm_tree; 635 u64 max_trees; 636 int err, i; 637 638 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_LPM_TREES)) 639 return -EIO; 640 641 max_trees = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_LPM_TREES); 642 mlxsw_sp->router->lpm.tree_count = max_trees - MLXSW_SP_LPM_TREE_MIN; 643 mlxsw_sp->router->lpm.trees = kcalloc(mlxsw_sp->router->lpm.tree_count, 644 sizeof(struct mlxsw_sp_lpm_tree), 645 GFP_KERNEL); 646 if (!mlxsw_sp->router->lpm.trees) 647 return -ENOMEM; 648 649 for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) { 650 lpm_tree = &mlxsw_sp->router->lpm.trees[i]; 651 lpm_tree->id = i + MLXSW_SP_LPM_TREE_MIN; 652 } 653 654 lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, 655 MLXSW_SP_L3_PROTO_IPV4); 656 if (IS_ERR(lpm_tree)) { 657 err = PTR_ERR(lpm_tree); 658 goto err_ipv4_tree_get; 659 } 660 mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4] = lpm_tree; 661 662 lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, 663 MLXSW_SP_L3_PROTO_IPV6); 664 if (IS_ERR(lpm_tree)) { 665 err = PTR_ERR(lpm_tree); 666 goto err_ipv6_tree_get; 667 } 668 mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV6] = lpm_tree; 669 670 return 0; 671 672 err_ipv6_tree_get: 673 lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4]; 674 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 675 err_ipv4_tree_get: 676 kfree(mlxsw_sp->router->lpm.trees); 677 return err; 678 } 679 680 static void mlxsw_sp_lpm_fini(struct mlxsw_sp *mlxsw_sp) 681 { 682 struct mlxsw_sp_lpm_tree *lpm_tree; 683 684 lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV6]; 685 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 686 687 lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4]; 688 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 689 690 kfree(mlxsw_sp->router->lpm.trees); 691 } 692 693 static bool mlxsw_sp_vr_is_used(const struct mlxsw_sp_vr *vr) 694 { 695 return !!vr->fib4 || !!vr->fib6 || 696 !!vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] || 697 !!vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]; 698 } 699 700 static struct mlxsw_sp_vr *mlxsw_sp_vr_find_unused(struct mlxsw_sp *mlxsw_sp) 701 { 702 struct mlxsw_sp_vr *vr; 703 int i; 704 705 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 706 vr = &mlxsw_sp->router->vrs[i]; 707 if (!mlxsw_sp_vr_is_used(vr)) 708 return vr; 709 } 710 return NULL; 711 } 712 713 static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp, 714 const struct mlxsw_sp_fib *fib, u8 tree_id) 715 { 716 char raltb_pl[MLXSW_REG_RALTB_LEN]; 717 718 mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id, 719 (enum mlxsw_reg_ralxx_protocol) fib->proto, 720 tree_id); 721 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl); 722 } 723 724 static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp, 725 const struct mlxsw_sp_fib *fib) 726 { 727 char raltb_pl[MLXSW_REG_RALTB_LEN]; 728 729 /* Bind to tree 0 which is default */ 730 mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id, 731 (enum mlxsw_reg_ralxx_protocol) fib->proto, 0); 732 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl); 733 } 734 735 static u32 mlxsw_sp_fix_tb_id(u32 tb_id) 736 { 737 /* For our purpose, squash main, default and local tables into one */ 738 if (tb_id == RT_TABLE_LOCAL || tb_id == RT_TABLE_DEFAULT) 739 tb_id = RT_TABLE_MAIN; 740 return tb_id; 741 } 742 743 static struct mlxsw_sp_vr *mlxsw_sp_vr_find(struct mlxsw_sp *mlxsw_sp, 744 u32 tb_id) 745 { 746 struct mlxsw_sp_vr *vr; 747 int i; 748 749 tb_id = mlxsw_sp_fix_tb_id(tb_id); 750 751 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 752 vr = &mlxsw_sp->router->vrs[i]; 753 if (mlxsw_sp_vr_is_used(vr) && vr->tb_id == tb_id) 754 return vr; 755 } 756 return NULL; 757 } 758 759 int mlxsw_sp_router_tb_id_vr_id(struct mlxsw_sp *mlxsw_sp, u32 tb_id, 760 u16 *vr_id) 761 { 762 struct mlxsw_sp_vr *vr; 763 764 vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id); 765 if (!vr) 766 return -ESRCH; 767 *vr_id = vr->id; 768 769 return 0; 770 } 771 772 static struct mlxsw_sp_fib *mlxsw_sp_vr_fib(const struct mlxsw_sp_vr *vr, 773 enum mlxsw_sp_l3proto proto) 774 { 775 switch (proto) { 776 case MLXSW_SP_L3_PROTO_IPV4: 777 return vr->fib4; 778 case MLXSW_SP_L3_PROTO_IPV6: 779 return vr->fib6; 780 } 781 return NULL; 782 } 783 784 static struct mlxsw_sp_vr *mlxsw_sp_vr_create(struct mlxsw_sp *mlxsw_sp, 785 u32 tb_id, 786 struct netlink_ext_ack *extack) 787 { 788 struct mlxsw_sp_mr_table *mr4_table, *mr6_table; 789 struct mlxsw_sp_fib *fib4; 790 struct mlxsw_sp_fib *fib6; 791 struct mlxsw_sp_vr *vr; 792 int err; 793 794 vr = mlxsw_sp_vr_find_unused(mlxsw_sp); 795 if (!vr) { 796 NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported virtual routers"); 797 return ERR_PTR(-EBUSY); 798 } 799 fib4 = mlxsw_sp_fib_create(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV4); 800 if (IS_ERR(fib4)) 801 return ERR_CAST(fib4); 802 fib6 = mlxsw_sp_fib_create(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV6); 803 if (IS_ERR(fib6)) { 804 err = PTR_ERR(fib6); 805 goto err_fib6_create; 806 } 807 mr4_table = mlxsw_sp_mr_table_create(mlxsw_sp, vr->id, 808 MLXSW_SP_L3_PROTO_IPV4); 809 if (IS_ERR(mr4_table)) { 810 err = PTR_ERR(mr4_table); 811 goto err_mr4_table_create; 812 } 813 mr6_table = mlxsw_sp_mr_table_create(mlxsw_sp, vr->id, 814 MLXSW_SP_L3_PROTO_IPV6); 815 if (IS_ERR(mr6_table)) { 816 err = PTR_ERR(mr6_table); 817 goto err_mr6_table_create; 818 } 819 820 vr->fib4 = fib4; 821 vr->fib6 = fib6; 822 vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] = mr4_table; 823 vr->mr_table[MLXSW_SP_L3_PROTO_IPV6] = mr6_table; 824 vr->tb_id = tb_id; 825 return vr; 826 827 err_mr6_table_create: 828 mlxsw_sp_mr_table_destroy(mr4_table); 829 err_mr4_table_create: 830 mlxsw_sp_fib_destroy(mlxsw_sp, fib6); 831 err_fib6_create: 832 mlxsw_sp_fib_destroy(mlxsw_sp, fib4); 833 return ERR_PTR(err); 834 } 835 836 static void mlxsw_sp_vr_destroy(struct mlxsw_sp *mlxsw_sp, 837 struct mlxsw_sp_vr *vr) 838 { 839 mlxsw_sp_mr_table_destroy(vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]); 840 vr->mr_table[MLXSW_SP_L3_PROTO_IPV6] = NULL; 841 mlxsw_sp_mr_table_destroy(vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]); 842 vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] = NULL; 843 mlxsw_sp_fib_destroy(mlxsw_sp, vr->fib6); 844 vr->fib6 = NULL; 845 mlxsw_sp_fib_destroy(mlxsw_sp, vr->fib4); 846 vr->fib4 = NULL; 847 } 848 849 static struct mlxsw_sp_vr *mlxsw_sp_vr_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, 850 struct netlink_ext_ack *extack) 851 { 852 struct mlxsw_sp_vr *vr; 853 854 tb_id = mlxsw_sp_fix_tb_id(tb_id); 855 vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id); 856 if (!vr) 857 vr = mlxsw_sp_vr_create(mlxsw_sp, tb_id, extack); 858 return vr; 859 } 860 861 static void mlxsw_sp_vr_put(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr) 862 { 863 if (!vr->rif_count && list_empty(&vr->fib4->node_list) && 864 list_empty(&vr->fib6->node_list) && 865 mlxsw_sp_mr_table_empty(vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]) && 866 mlxsw_sp_mr_table_empty(vr->mr_table[MLXSW_SP_L3_PROTO_IPV6])) 867 mlxsw_sp_vr_destroy(mlxsw_sp, vr); 868 } 869 870 static bool 871 mlxsw_sp_vr_lpm_tree_should_replace(struct mlxsw_sp_vr *vr, 872 enum mlxsw_sp_l3proto proto, u8 tree_id) 873 { 874 struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto); 875 876 if (!mlxsw_sp_vr_is_used(vr)) 877 return false; 878 if (fib->lpm_tree->id == tree_id) 879 return true; 880 return false; 881 } 882 883 static int mlxsw_sp_vr_lpm_tree_replace(struct mlxsw_sp *mlxsw_sp, 884 struct mlxsw_sp_fib *fib, 885 struct mlxsw_sp_lpm_tree *new_tree) 886 { 887 struct mlxsw_sp_lpm_tree *old_tree = fib->lpm_tree; 888 int err; 889 890 fib->lpm_tree = new_tree; 891 mlxsw_sp_lpm_tree_hold(new_tree); 892 err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib, new_tree->id); 893 if (err) 894 goto err_tree_bind; 895 mlxsw_sp_lpm_tree_put(mlxsw_sp, old_tree); 896 return 0; 897 898 err_tree_bind: 899 mlxsw_sp_lpm_tree_put(mlxsw_sp, new_tree); 900 fib->lpm_tree = old_tree; 901 return err; 902 } 903 904 static int mlxsw_sp_vrs_lpm_tree_replace(struct mlxsw_sp *mlxsw_sp, 905 struct mlxsw_sp_fib *fib, 906 struct mlxsw_sp_lpm_tree *new_tree) 907 { 908 enum mlxsw_sp_l3proto proto = fib->proto; 909 struct mlxsw_sp_lpm_tree *old_tree; 910 u8 old_id, new_id = new_tree->id; 911 struct mlxsw_sp_vr *vr; 912 int i, err; 913 914 old_tree = mlxsw_sp->router->lpm.proto_trees[proto]; 915 old_id = old_tree->id; 916 917 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 918 vr = &mlxsw_sp->router->vrs[i]; 919 if (!mlxsw_sp_vr_lpm_tree_should_replace(vr, proto, old_id)) 920 continue; 921 err = mlxsw_sp_vr_lpm_tree_replace(mlxsw_sp, 922 mlxsw_sp_vr_fib(vr, proto), 923 new_tree); 924 if (err) 925 goto err_tree_replace; 926 } 927 928 memcpy(new_tree->prefix_ref_count, old_tree->prefix_ref_count, 929 sizeof(new_tree->prefix_ref_count)); 930 mlxsw_sp->router->lpm.proto_trees[proto] = new_tree; 931 mlxsw_sp_lpm_tree_put(mlxsw_sp, old_tree); 932 933 return 0; 934 935 err_tree_replace: 936 for (i--; i >= 0; i--) { 937 if (!mlxsw_sp_vr_lpm_tree_should_replace(vr, proto, new_id)) 938 continue; 939 mlxsw_sp_vr_lpm_tree_replace(mlxsw_sp, 940 mlxsw_sp_vr_fib(vr, proto), 941 old_tree); 942 } 943 return err; 944 } 945 946 static int mlxsw_sp_vrs_init(struct mlxsw_sp *mlxsw_sp) 947 { 948 struct mlxsw_sp_vr *vr; 949 u64 max_vrs; 950 int i; 951 952 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_VRS)) 953 return -EIO; 954 955 max_vrs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); 956 mlxsw_sp->router->vrs = kcalloc(max_vrs, sizeof(struct mlxsw_sp_vr), 957 GFP_KERNEL); 958 if (!mlxsw_sp->router->vrs) 959 return -ENOMEM; 960 961 for (i = 0; i < max_vrs; i++) { 962 vr = &mlxsw_sp->router->vrs[i]; 963 vr->id = i; 964 } 965 966 return 0; 967 } 968 969 static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp); 970 971 static void mlxsw_sp_vrs_fini(struct mlxsw_sp *mlxsw_sp) 972 { 973 /* At this stage we're guaranteed not to have new incoming 974 * FIB notifications and the work queue is free from FIBs 975 * sitting on top of mlxsw netdevs. However, we can still 976 * have other FIBs queued. Flush the queue before flushing 977 * the device's tables. No need for locks, as we're the only 978 * writer. 979 */ 980 mlxsw_core_flush_owq(); 981 mlxsw_sp_router_fib_flush(mlxsw_sp); 982 kfree(mlxsw_sp->router->vrs); 983 } 984 985 static struct net_device * 986 __mlxsw_sp_ipip_netdev_ul_dev_get(const struct net_device *ol_dev) 987 { 988 struct ip_tunnel *tun = netdev_priv(ol_dev); 989 struct net *net = dev_net(ol_dev); 990 991 return __dev_get_by_index(net, tun->parms.link); 992 } 993 994 u32 mlxsw_sp_ipip_dev_ul_tb_id(const struct net_device *ol_dev) 995 { 996 struct net_device *d = __mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev); 997 998 if (d) 999 return l3mdev_fib_table(d) ? : RT_TABLE_MAIN; 1000 else 1001 return RT_TABLE_MAIN; 1002 } 1003 1004 static struct mlxsw_sp_rif * 1005 mlxsw_sp_rif_create(struct mlxsw_sp *mlxsw_sp, 1006 const struct mlxsw_sp_rif_params *params, 1007 struct netlink_ext_ack *extack); 1008 1009 static struct mlxsw_sp_rif_ipip_lb * 1010 mlxsw_sp_ipip_ol_ipip_lb_create(struct mlxsw_sp *mlxsw_sp, 1011 enum mlxsw_sp_ipip_type ipipt, 1012 struct net_device *ol_dev, 1013 struct netlink_ext_ack *extack) 1014 { 1015 struct mlxsw_sp_rif_params_ipip_lb lb_params; 1016 const struct mlxsw_sp_ipip_ops *ipip_ops; 1017 struct mlxsw_sp_rif *rif; 1018 1019 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipipt]; 1020 lb_params = (struct mlxsw_sp_rif_params_ipip_lb) { 1021 .common.dev = ol_dev, 1022 .common.lag = false, 1023 .lb_config = ipip_ops->ol_loopback_config(mlxsw_sp, ol_dev), 1024 }; 1025 1026 rif = mlxsw_sp_rif_create(mlxsw_sp, &lb_params.common, extack); 1027 if (IS_ERR(rif)) 1028 return ERR_CAST(rif); 1029 return container_of(rif, struct mlxsw_sp_rif_ipip_lb, common); 1030 } 1031 1032 static struct mlxsw_sp_ipip_entry * 1033 mlxsw_sp_ipip_entry_alloc(struct mlxsw_sp *mlxsw_sp, 1034 enum mlxsw_sp_ipip_type ipipt, 1035 struct net_device *ol_dev) 1036 { 1037 const struct mlxsw_sp_ipip_ops *ipip_ops; 1038 struct mlxsw_sp_ipip_entry *ipip_entry; 1039 struct mlxsw_sp_ipip_entry *ret = NULL; 1040 1041 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipipt]; 1042 ipip_entry = kzalloc(sizeof(*ipip_entry), GFP_KERNEL); 1043 if (!ipip_entry) 1044 return ERR_PTR(-ENOMEM); 1045 1046 ipip_entry->ol_lb = mlxsw_sp_ipip_ol_ipip_lb_create(mlxsw_sp, ipipt, 1047 ol_dev, NULL); 1048 if (IS_ERR(ipip_entry->ol_lb)) { 1049 ret = ERR_CAST(ipip_entry->ol_lb); 1050 goto err_ol_ipip_lb_create; 1051 } 1052 1053 ipip_entry->ipipt = ipipt; 1054 ipip_entry->ol_dev = ol_dev; 1055 1056 switch (ipip_ops->ul_proto) { 1057 case MLXSW_SP_L3_PROTO_IPV4: 1058 ipip_entry->parms4 = mlxsw_sp_ipip_netdev_parms4(ol_dev); 1059 break; 1060 case MLXSW_SP_L3_PROTO_IPV6: 1061 WARN_ON(1); 1062 break; 1063 } 1064 1065 return ipip_entry; 1066 1067 err_ol_ipip_lb_create: 1068 kfree(ipip_entry); 1069 return ret; 1070 } 1071 1072 static void 1073 mlxsw_sp_ipip_entry_dealloc(struct mlxsw_sp_ipip_entry *ipip_entry) 1074 { 1075 mlxsw_sp_rif_destroy(&ipip_entry->ol_lb->common); 1076 kfree(ipip_entry); 1077 } 1078 1079 static bool 1080 mlxsw_sp_ipip_entry_saddr_matches(struct mlxsw_sp *mlxsw_sp, 1081 const enum mlxsw_sp_l3proto ul_proto, 1082 union mlxsw_sp_l3addr saddr, 1083 u32 ul_tb_id, 1084 struct mlxsw_sp_ipip_entry *ipip_entry) 1085 { 1086 u32 tun_ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ipip_entry->ol_dev); 1087 enum mlxsw_sp_ipip_type ipipt = ipip_entry->ipipt; 1088 union mlxsw_sp_l3addr tun_saddr; 1089 1090 if (mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto != ul_proto) 1091 return false; 1092 1093 tun_saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ipip_entry->ol_dev); 1094 return tun_ul_tb_id == ul_tb_id && 1095 mlxsw_sp_l3addr_eq(&tun_saddr, &saddr); 1096 } 1097 1098 static int 1099 mlxsw_sp_fib_entry_decap_init(struct mlxsw_sp *mlxsw_sp, 1100 struct mlxsw_sp_fib_entry *fib_entry, 1101 struct mlxsw_sp_ipip_entry *ipip_entry) 1102 { 1103 u32 tunnel_index; 1104 int err; 1105 1106 err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1107 1, &tunnel_index); 1108 if (err) 1109 return err; 1110 1111 ipip_entry->decap_fib_entry = fib_entry; 1112 fib_entry->decap.ipip_entry = ipip_entry; 1113 fib_entry->decap.tunnel_index = tunnel_index; 1114 return 0; 1115 } 1116 1117 static void mlxsw_sp_fib_entry_decap_fini(struct mlxsw_sp *mlxsw_sp, 1118 struct mlxsw_sp_fib_entry *fib_entry) 1119 { 1120 /* Unlink this node from the IPIP entry that it's the decap entry of. */ 1121 fib_entry->decap.ipip_entry->decap_fib_entry = NULL; 1122 fib_entry->decap.ipip_entry = NULL; 1123 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1124 1, fib_entry->decap.tunnel_index); 1125 } 1126 1127 static struct mlxsw_sp_fib_node * 1128 mlxsw_sp_fib_node_lookup(struct mlxsw_sp_fib *fib, const void *addr, 1129 size_t addr_len, unsigned char prefix_len); 1130 static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp, 1131 struct mlxsw_sp_fib_entry *fib_entry); 1132 1133 static void 1134 mlxsw_sp_ipip_entry_demote_decap(struct mlxsw_sp *mlxsw_sp, 1135 struct mlxsw_sp_ipip_entry *ipip_entry) 1136 { 1137 struct mlxsw_sp_fib_entry *fib_entry = ipip_entry->decap_fib_entry; 1138 1139 mlxsw_sp_fib_entry_decap_fini(mlxsw_sp, fib_entry); 1140 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 1141 1142 mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 1143 } 1144 1145 static void 1146 mlxsw_sp_ipip_entry_promote_decap(struct mlxsw_sp *mlxsw_sp, 1147 struct mlxsw_sp_ipip_entry *ipip_entry, 1148 struct mlxsw_sp_fib_entry *decap_fib_entry) 1149 { 1150 if (mlxsw_sp_fib_entry_decap_init(mlxsw_sp, decap_fib_entry, 1151 ipip_entry)) 1152 return; 1153 decap_fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP; 1154 1155 if (mlxsw_sp_fib_entry_update(mlxsw_sp, decap_fib_entry)) 1156 mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry); 1157 } 1158 1159 static struct mlxsw_sp_fib_entry * 1160 mlxsw_sp_router_ip2me_fib_entry_find(struct mlxsw_sp *mlxsw_sp, u32 tb_id, 1161 enum mlxsw_sp_l3proto proto, 1162 const union mlxsw_sp_l3addr *addr, 1163 enum mlxsw_sp_fib_entry_type type) 1164 { 1165 struct mlxsw_sp_fib_entry *fib_entry; 1166 struct mlxsw_sp_fib_node *fib_node; 1167 unsigned char addr_prefix_len; 1168 struct mlxsw_sp_fib *fib; 1169 struct mlxsw_sp_vr *vr; 1170 const void *addrp; 1171 size_t addr_len; 1172 u32 addr4; 1173 1174 vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id); 1175 if (!vr) 1176 return NULL; 1177 fib = mlxsw_sp_vr_fib(vr, proto); 1178 1179 switch (proto) { 1180 case MLXSW_SP_L3_PROTO_IPV4: 1181 addr4 = be32_to_cpu(addr->addr4); 1182 addrp = &addr4; 1183 addr_len = 4; 1184 addr_prefix_len = 32; 1185 break; 1186 case MLXSW_SP_L3_PROTO_IPV6: /* fall through */ 1187 default: 1188 WARN_ON(1); 1189 return NULL; 1190 } 1191 1192 fib_node = mlxsw_sp_fib_node_lookup(fib, addrp, addr_len, 1193 addr_prefix_len); 1194 if (!fib_node || list_empty(&fib_node->entry_list)) 1195 return NULL; 1196 1197 fib_entry = list_first_entry(&fib_node->entry_list, 1198 struct mlxsw_sp_fib_entry, list); 1199 if (fib_entry->type != type) 1200 return NULL; 1201 1202 return fib_entry; 1203 } 1204 1205 /* Given an IPIP entry, find the corresponding decap route. */ 1206 static struct mlxsw_sp_fib_entry * 1207 mlxsw_sp_ipip_entry_find_decap(struct mlxsw_sp *mlxsw_sp, 1208 struct mlxsw_sp_ipip_entry *ipip_entry) 1209 { 1210 static struct mlxsw_sp_fib_node *fib_node; 1211 const struct mlxsw_sp_ipip_ops *ipip_ops; 1212 struct mlxsw_sp_fib_entry *fib_entry; 1213 unsigned char saddr_prefix_len; 1214 union mlxsw_sp_l3addr saddr; 1215 struct mlxsw_sp_fib *ul_fib; 1216 struct mlxsw_sp_vr *ul_vr; 1217 const void *saddrp; 1218 size_t saddr_len; 1219 u32 ul_tb_id; 1220 u32 saddr4; 1221 1222 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 1223 1224 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ipip_entry->ol_dev); 1225 ul_vr = mlxsw_sp_vr_find(mlxsw_sp, ul_tb_id); 1226 if (!ul_vr) 1227 return NULL; 1228 1229 ul_fib = mlxsw_sp_vr_fib(ul_vr, ipip_ops->ul_proto); 1230 saddr = mlxsw_sp_ipip_netdev_saddr(ipip_ops->ul_proto, 1231 ipip_entry->ol_dev); 1232 1233 switch (ipip_ops->ul_proto) { 1234 case MLXSW_SP_L3_PROTO_IPV4: 1235 saddr4 = be32_to_cpu(saddr.addr4); 1236 saddrp = &saddr4; 1237 saddr_len = 4; 1238 saddr_prefix_len = 32; 1239 break; 1240 case MLXSW_SP_L3_PROTO_IPV6: 1241 WARN_ON(1); 1242 return NULL; 1243 } 1244 1245 fib_node = mlxsw_sp_fib_node_lookup(ul_fib, saddrp, saddr_len, 1246 saddr_prefix_len); 1247 if (!fib_node || list_empty(&fib_node->entry_list)) 1248 return NULL; 1249 1250 fib_entry = list_first_entry(&fib_node->entry_list, 1251 struct mlxsw_sp_fib_entry, list); 1252 if (fib_entry->type != MLXSW_SP_FIB_ENTRY_TYPE_TRAP) 1253 return NULL; 1254 1255 return fib_entry; 1256 } 1257 1258 static struct mlxsw_sp_ipip_entry * 1259 mlxsw_sp_ipip_entry_create(struct mlxsw_sp *mlxsw_sp, 1260 enum mlxsw_sp_ipip_type ipipt, 1261 struct net_device *ol_dev) 1262 { 1263 struct mlxsw_sp_ipip_entry *ipip_entry; 1264 1265 ipip_entry = mlxsw_sp_ipip_entry_alloc(mlxsw_sp, ipipt, ol_dev); 1266 if (IS_ERR(ipip_entry)) 1267 return ipip_entry; 1268 1269 list_add_tail(&ipip_entry->ipip_list_node, 1270 &mlxsw_sp->router->ipip_list); 1271 1272 return ipip_entry; 1273 } 1274 1275 static void 1276 mlxsw_sp_ipip_entry_destroy(struct mlxsw_sp *mlxsw_sp, 1277 struct mlxsw_sp_ipip_entry *ipip_entry) 1278 { 1279 list_del(&ipip_entry->ipip_list_node); 1280 mlxsw_sp_ipip_entry_dealloc(ipip_entry); 1281 } 1282 1283 static bool 1284 mlxsw_sp_ipip_entry_matches_decap(struct mlxsw_sp *mlxsw_sp, 1285 const struct net_device *ul_dev, 1286 enum mlxsw_sp_l3proto ul_proto, 1287 union mlxsw_sp_l3addr ul_dip, 1288 struct mlxsw_sp_ipip_entry *ipip_entry) 1289 { 1290 u32 ul_tb_id = l3mdev_fib_table(ul_dev) ? : RT_TABLE_MAIN; 1291 enum mlxsw_sp_ipip_type ipipt = ipip_entry->ipipt; 1292 1293 if (mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto != ul_proto) 1294 return false; 1295 1296 return mlxsw_sp_ipip_entry_saddr_matches(mlxsw_sp, ul_proto, ul_dip, 1297 ul_tb_id, ipip_entry); 1298 } 1299 1300 /* Given decap parameters, find the corresponding IPIP entry. */ 1301 static struct mlxsw_sp_ipip_entry * 1302 mlxsw_sp_ipip_entry_find_by_decap(struct mlxsw_sp *mlxsw_sp, 1303 const struct net_device *ul_dev, 1304 enum mlxsw_sp_l3proto ul_proto, 1305 union mlxsw_sp_l3addr ul_dip) 1306 { 1307 struct mlxsw_sp_ipip_entry *ipip_entry; 1308 1309 list_for_each_entry(ipip_entry, &mlxsw_sp->router->ipip_list, 1310 ipip_list_node) 1311 if (mlxsw_sp_ipip_entry_matches_decap(mlxsw_sp, ul_dev, 1312 ul_proto, ul_dip, 1313 ipip_entry)) 1314 return ipip_entry; 1315 1316 return NULL; 1317 } 1318 1319 static bool mlxsw_sp_netdev_ipip_type(const struct mlxsw_sp *mlxsw_sp, 1320 const struct net_device *dev, 1321 enum mlxsw_sp_ipip_type *p_type) 1322 { 1323 struct mlxsw_sp_router *router = mlxsw_sp->router; 1324 const struct mlxsw_sp_ipip_ops *ipip_ops; 1325 enum mlxsw_sp_ipip_type ipipt; 1326 1327 for (ipipt = 0; ipipt < MLXSW_SP_IPIP_TYPE_MAX; ++ipipt) { 1328 ipip_ops = router->ipip_ops_arr[ipipt]; 1329 if (dev->type == ipip_ops->dev_type) { 1330 if (p_type) 1331 *p_type = ipipt; 1332 return true; 1333 } 1334 } 1335 return false; 1336 } 1337 1338 bool mlxsw_sp_netdev_is_ipip_ol(const struct mlxsw_sp *mlxsw_sp, 1339 const struct net_device *dev) 1340 { 1341 return mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL); 1342 } 1343 1344 static struct mlxsw_sp_ipip_entry * 1345 mlxsw_sp_ipip_entry_find_by_ol_dev(struct mlxsw_sp *mlxsw_sp, 1346 const struct net_device *ol_dev) 1347 { 1348 struct mlxsw_sp_ipip_entry *ipip_entry; 1349 1350 list_for_each_entry(ipip_entry, &mlxsw_sp->router->ipip_list, 1351 ipip_list_node) 1352 if (ipip_entry->ol_dev == ol_dev) 1353 return ipip_entry; 1354 1355 return NULL; 1356 } 1357 1358 static struct mlxsw_sp_ipip_entry * 1359 mlxsw_sp_ipip_entry_find_by_ul_dev(const struct mlxsw_sp *mlxsw_sp, 1360 const struct net_device *ul_dev, 1361 struct mlxsw_sp_ipip_entry *start) 1362 { 1363 struct mlxsw_sp_ipip_entry *ipip_entry; 1364 1365 ipip_entry = list_prepare_entry(start, &mlxsw_sp->router->ipip_list, 1366 ipip_list_node); 1367 list_for_each_entry_continue(ipip_entry, &mlxsw_sp->router->ipip_list, 1368 ipip_list_node) { 1369 struct net_device *ipip_ul_dev = 1370 __mlxsw_sp_ipip_netdev_ul_dev_get(ipip_entry->ol_dev); 1371 1372 if (ipip_ul_dev == ul_dev) 1373 return ipip_entry; 1374 } 1375 1376 return NULL; 1377 } 1378 1379 bool mlxsw_sp_netdev_is_ipip_ul(const struct mlxsw_sp *mlxsw_sp, 1380 const struct net_device *dev) 1381 { 1382 return mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp, dev, NULL); 1383 } 1384 1385 static bool mlxsw_sp_netdevice_ipip_can_offload(struct mlxsw_sp *mlxsw_sp, 1386 const struct net_device *ol_dev, 1387 enum mlxsw_sp_ipip_type ipipt) 1388 { 1389 const struct mlxsw_sp_ipip_ops *ops 1390 = mlxsw_sp->router->ipip_ops_arr[ipipt]; 1391 1392 /* For deciding whether decap should be offloaded, we don't care about 1393 * overlay protocol, so ask whether either one is supported. 1394 */ 1395 return ops->can_offload(mlxsw_sp, ol_dev, MLXSW_SP_L3_PROTO_IPV4) || 1396 ops->can_offload(mlxsw_sp, ol_dev, MLXSW_SP_L3_PROTO_IPV6); 1397 } 1398 1399 static int mlxsw_sp_netdevice_ipip_ol_reg_event(struct mlxsw_sp *mlxsw_sp, 1400 struct net_device *ol_dev) 1401 { 1402 struct mlxsw_sp_ipip_entry *ipip_entry; 1403 enum mlxsw_sp_l3proto ul_proto; 1404 enum mlxsw_sp_ipip_type ipipt; 1405 union mlxsw_sp_l3addr saddr; 1406 u32 ul_tb_id; 1407 1408 mlxsw_sp_netdev_ipip_type(mlxsw_sp, ol_dev, &ipipt); 1409 if (mlxsw_sp_netdevice_ipip_can_offload(mlxsw_sp, ol_dev, ipipt)) { 1410 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ol_dev); 1411 ul_proto = mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto; 1412 saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ol_dev); 1413 if (!mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp, ul_proto, 1414 saddr, ul_tb_id, 1415 NULL)) { 1416 ipip_entry = mlxsw_sp_ipip_entry_create(mlxsw_sp, ipipt, 1417 ol_dev); 1418 if (IS_ERR(ipip_entry)) 1419 return PTR_ERR(ipip_entry); 1420 } 1421 } 1422 1423 return 0; 1424 } 1425 1426 static void mlxsw_sp_netdevice_ipip_ol_unreg_event(struct mlxsw_sp *mlxsw_sp, 1427 struct net_device *ol_dev) 1428 { 1429 struct mlxsw_sp_ipip_entry *ipip_entry; 1430 1431 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1432 if (ipip_entry) 1433 mlxsw_sp_ipip_entry_destroy(mlxsw_sp, ipip_entry); 1434 } 1435 1436 static void 1437 mlxsw_sp_ipip_entry_ol_up_event(struct mlxsw_sp *mlxsw_sp, 1438 struct mlxsw_sp_ipip_entry *ipip_entry) 1439 { 1440 struct mlxsw_sp_fib_entry *decap_fib_entry; 1441 1442 decap_fib_entry = mlxsw_sp_ipip_entry_find_decap(mlxsw_sp, ipip_entry); 1443 if (decap_fib_entry) 1444 mlxsw_sp_ipip_entry_promote_decap(mlxsw_sp, ipip_entry, 1445 decap_fib_entry); 1446 } 1447 1448 static int 1449 mlxsw_sp_rif_ipip_lb_op(struct mlxsw_sp_rif_ipip_lb *lb_rif, u16 ul_vr_id, 1450 u16 ul_rif_id, bool enable) 1451 { 1452 struct mlxsw_sp_rif_ipip_lb_config lb_cf = lb_rif->lb_config; 1453 struct mlxsw_sp_rif *rif = &lb_rif->common; 1454 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 1455 char ritr_pl[MLXSW_REG_RITR_LEN]; 1456 u32 saddr4; 1457 1458 switch (lb_cf.ul_protocol) { 1459 case MLXSW_SP_L3_PROTO_IPV4: 1460 saddr4 = be32_to_cpu(lb_cf.saddr.addr4); 1461 mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF, 1462 rif->rif_index, rif->vr_id, rif->dev->mtu); 1463 mlxsw_reg_ritr_loopback_ipip4_pack(ritr_pl, lb_cf.lb_ipipt, 1464 MLXSW_REG_RITR_LOOPBACK_IPIP_OPTIONS_GRE_KEY_PRESET, 1465 ul_vr_id, ul_rif_id, saddr4, lb_cf.okey); 1466 break; 1467 1468 case MLXSW_SP_L3_PROTO_IPV6: 1469 return -EAFNOSUPPORT; 1470 } 1471 1472 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 1473 } 1474 1475 static int mlxsw_sp_netdevice_ipip_ol_update_mtu(struct mlxsw_sp *mlxsw_sp, 1476 struct net_device *ol_dev) 1477 { 1478 struct mlxsw_sp_ipip_entry *ipip_entry; 1479 struct mlxsw_sp_rif_ipip_lb *lb_rif; 1480 int err = 0; 1481 1482 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1483 if (ipip_entry) { 1484 lb_rif = ipip_entry->ol_lb; 1485 err = mlxsw_sp_rif_ipip_lb_op(lb_rif, lb_rif->ul_vr_id, 1486 lb_rif->ul_rif_id, true); 1487 if (err) 1488 goto out; 1489 lb_rif->common.mtu = ol_dev->mtu; 1490 } 1491 1492 out: 1493 return err; 1494 } 1495 1496 static void mlxsw_sp_netdevice_ipip_ol_up_event(struct mlxsw_sp *mlxsw_sp, 1497 struct net_device *ol_dev) 1498 { 1499 struct mlxsw_sp_ipip_entry *ipip_entry; 1500 1501 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1502 if (ipip_entry) 1503 mlxsw_sp_ipip_entry_ol_up_event(mlxsw_sp, ipip_entry); 1504 } 1505 1506 static void 1507 mlxsw_sp_ipip_entry_ol_down_event(struct mlxsw_sp *mlxsw_sp, 1508 struct mlxsw_sp_ipip_entry *ipip_entry) 1509 { 1510 if (ipip_entry->decap_fib_entry) 1511 mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry); 1512 } 1513 1514 static void mlxsw_sp_netdevice_ipip_ol_down_event(struct mlxsw_sp *mlxsw_sp, 1515 struct net_device *ol_dev) 1516 { 1517 struct mlxsw_sp_ipip_entry *ipip_entry; 1518 1519 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1520 if (ipip_entry) 1521 mlxsw_sp_ipip_entry_ol_down_event(mlxsw_sp, ipip_entry); 1522 } 1523 1524 static void mlxsw_sp_nexthop_rif_migrate(struct mlxsw_sp *mlxsw_sp, 1525 struct mlxsw_sp_rif *old_rif, 1526 struct mlxsw_sp_rif *new_rif); 1527 static int 1528 mlxsw_sp_ipip_entry_ol_lb_update(struct mlxsw_sp *mlxsw_sp, 1529 struct mlxsw_sp_ipip_entry *ipip_entry, 1530 bool keep_encap, 1531 struct netlink_ext_ack *extack) 1532 { 1533 struct mlxsw_sp_rif_ipip_lb *old_lb_rif = ipip_entry->ol_lb; 1534 struct mlxsw_sp_rif_ipip_lb *new_lb_rif; 1535 1536 new_lb_rif = mlxsw_sp_ipip_ol_ipip_lb_create(mlxsw_sp, 1537 ipip_entry->ipipt, 1538 ipip_entry->ol_dev, 1539 extack); 1540 if (IS_ERR(new_lb_rif)) 1541 return PTR_ERR(new_lb_rif); 1542 ipip_entry->ol_lb = new_lb_rif; 1543 1544 if (keep_encap) 1545 mlxsw_sp_nexthop_rif_migrate(mlxsw_sp, &old_lb_rif->common, 1546 &new_lb_rif->common); 1547 1548 mlxsw_sp_rif_destroy(&old_lb_rif->common); 1549 1550 return 0; 1551 } 1552 1553 static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp, 1554 struct mlxsw_sp_rif *rif); 1555 1556 /** 1557 * Update the offload related to an IPIP entry. This always updates decap, and 1558 * in addition to that it also: 1559 * @recreate_loopback: recreates the associated loopback RIF 1560 * @keep_encap: updates next hops that use the tunnel netdevice. This is only 1561 * relevant when recreate_loopback is true. 1562 * @update_nexthops: updates next hops, keeping the current loopback RIF. This 1563 * is only relevant when recreate_loopback is false. 1564 */ 1565 int __mlxsw_sp_ipip_entry_update_tunnel(struct mlxsw_sp *mlxsw_sp, 1566 struct mlxsw_sp_ipip_entry *ipip_entry, 1567 bool recreate_loopback, 1568 bool keep_encap, 1569 bool update_nexthops, 1570 struct netlink_ext_ack *extack) 1571 { 1572 int err; 1573 1574 /* RIFs can't be edited, so to update loopback, we need to destroy and 1575 * recreate it. That creates a window of opportunity where RALUE and 1576 * RATR registers end up referencing a RIF that's already gone. RATRs 1577 * are handled in mlxsw_sp_ipip_entry_ol_lb_update(), and to take care 1578 * of RALUE, demote the decap route back. 1579 */ 1580 if (ipip_entry->decap_fib_entry) 1581 mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry); 1582 1583 if (recreate_loopback) { 1584 err = mlxsw_sp_ipip_entry_ol_lb_update(mlxsw_sp, ipip_entry, 1585 keep_encap, extack); 1586 if (err) 1587 return err; 1588 } else if (update_nexthops) { 1589 mlxsw_sp_nexthop_rif_update(mlxsw_sp, 1590 &ipip_entry->ol_lb->common); 1591 } 1592 1593 if (ipip_entry->ol_dev->flags & IFF_UP) 1594 mlxsw_sp_ipip_entry_ol_up_event(mlxsw_sp, ipip_entry); 1595 1596 return 0; 1597 } 1598 1599 static int mlxsw_sp_netdevice_ipip_ol_vrf_event(struct mlxsw_sp *mlxsw_sp, 1600 struct net_device *ol_dev, 1601 struct netlink_ext_ack *extack) 1602 { 1603 struct mlxsw_sp_ipip_entry *ipip_entry = 1604 mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1605 1606 if (!ipip_entry) 1607 return 0; 1608 1609 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1610 true, false, false, extack); 1611 } 1612 1613 static int 1614 mlxsw_sp_netdevice_ipip_ul_vrf_event(struct mlxsw_sp *mlxsw_sp, 1615 struct mlxsw_sp_ipip_entry *ipip_entry, 1616 struct net_device *ul_dev, 1617 bool *demote_this, 1618 struct netlink_ext_ack *extack) 1619 { 1620 u32 ul_tb_id = l3mdev_fib_table(ul_dev) ? : RT_TABLE_MAIN; 1621 enum mlxsw_sp_l3proto ul_proto; 1622 union mlxsw_sp_l3addr saddr; 1623 1624 /* Moving underlay to a different VRF might cause local address 1625 * conflict, and the conflicting tunnels need to be demoted. 1626 */ 1627 ul_proto = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]->ul_proto; 1628 saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ipip_entry->ol_dev); 1629 if (mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp, ul_proto, 1630 saddr, ul_tb_id, 1631 ipip_entry)) { 1632 *demote_this = true; 1633 return 0; 1634 } 1635 1636 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1637 true, true, false, extack); 1638 } 1639 1640 static int 1641 mlxsw_sp_netdevice_ipip_ul_up_event(struct mlxsw_sp *mlxsw_sp, 1642 struct mlxsw_sp_ipip_entry *ipip_entry, 1643 struct net_device *ul_dev) 1644 { 1645 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1646 false, false, true, NULL); 1647 } 1648 1649 static int 1650 mlxsw_sp_netdevice_ipip_ul_down_event(struct mlxsw_sp *mlxsw_sp, 1651 struct mlxsw_sp_ipip_entry *ipip_entry, 1652 struct net_device *ul_dev) 1653 { 1654 /* A down underlay device causes encapsulated packets to not be 1655 * forwarded, but decap still works. So refresh next hops without 1656 * touching anything else. 1657 */ 1658 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1659 false, false, true, NULL); 1660 } 1661 1662 static int 1663 mlxsw_sp_netdevice_ipip_ol_change_event(struct mlxsw_sp *mlxsw_sp, 1664 struct net_device *ol_dev, 1665 struct netlink_ext_ack *extack) 1666 { 1667 const struct mlxsw_sp_ipip_ops *ipip_ops; 1668 struct mlxsw_sp_ipip_entry *ipip_entry; 1669 int err; 1670 1671 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1672 if (!ipip_entry) 1673 /* A change might make a tunnel eligible for offloading, but 1674 * that is currently not implemented. What falls to slow path 1675 * stays there. 1676 */ 1677 return 0; 1678 1679 /* A change might make a tunnel not eligible for offloading. */ 1680 if (!mlxsw_sp_netdevice_ipip_can_offload(mlxsw_sp, ol_dev, 1681 ipip_entry->ipipt)) { 1682 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1683 return 0; 1684 } 1685 1686 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 1687 err = ipip_ops->ol_netdev_change(mlxsw_sp, ipip_entry, extack); 1688 return err; 1689 } 1690 1691 void mlxsw_sp_ipip_entry_demote_tunnel(struct mlxsw_sp *mlxsw_sp, 1692 struct mlxsw_sp_ipip_entry *ipip_entry) 1693 { 1694 struct net_device *ol_dev = ipip_entry->ol_dev; 1695 1696 if (ol_dev->flags & IFF_UP) 1697 mlxsw_sp_ipip_entry_ol_down_event(mlxsw_sp, ipip_entry); 1698 mlxsw_sp_ipip_entry_destroy(mlxsw_sp, ipip_entry); 1699 } 1700 1701 /* The configuration where several tunnels have the same local address in the 1702 * same underlay table needs special treatment in the HW. That is currently not 1703 * implemented in the driver. This function finds and demotes the first tunnel 1704 * with a given source address, except the one passed in in the argument 1705 * `except'. 1706 */ 1707 bool 1708 mlxsw_sp_ipip_demote_tunnel_by_saddr(struct mlxsw_sp *mlxsw_sp, 1709 enum mlxsw_sp_l3proto ul_proto, 1710 union mlxsw_sp_l3addr saddr, 1711 u32 ul_tb_id, 1712 const struct mlxsw_sp_ipip_entry *except) 1713 { 1714 struct mlxsw_sp_ipip_entry *ipip_entry, *tmp; 1715 1716 list_for_each_entry_safe(ipip_entry, tmp, &mlxsw_sp->router->ipip_list, 1717 ipip_list_node) { 1718 if (ipip_entry != except && 1719 mlxsw_sp_ipip_entry_saddr_matches(mlxsw_sp, ul_proto, saddr, 1720 ul_tb_id, ipip_entry)) { 1721 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1722 return true; 1723 } 1724 } 1725 1726 return false; 1727 } 1728 1729 static void mlxsw_sp_ipip_demote_tunnel_by_ul_netdev(struct mlxsw_sp *mlxsw_sp, 1730 struct net_device *ul_dev) 1731 { 1732 struct mlxsw_sp_ipip_entry *ipip_entry, *tmp; 1733 1734 list_for_each_entry_safe(ipip_entry, tmp, &mlxsw_sp->router->ipip_list, 1735 ipip_list_node) { 1736 struct net_device *ipip_ul_dev = 1737 __mlxsw_sp_ipip_netdev_ul_dev_get(ipip_entry->ol_dev); 1738 1739 if (ipip_ul_dev == ul_dev) 1740 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1741 } 1742 } 1743 1744 int mlxsw_sp_netdevice_ipip_ol_event(struct mlxsw_sp *mlxsw_sp, 1745 struct net_device *ol_dev, 1746 unsigned long event, 1747 struct netdev_notifier_info *info) 1748 { 1749 struct netdev_notifier_changeupper_info *chup; 1750 struct netlink_ext_ack *extack; 1751 1752 switch (event) { 1753 case NETDEV_REGISTER: 1754 return mlxsw_sp_netdevice_ipip_ol_reg_event(mlxsw_sp, ol_dev); 1755 case NETDEV_UNREGISTER: 1756 mlxsw_sp_netdevice_ipip_ol_unreg_event(mlxsw_sp, ol_dev); 1757 return 0; 1758 case NETDEV_UP: 1759 mlxsw_sp_netdevice_ipip_ol_up_event(mlxsw_sp, ol_dev); 1760 return 0; 1761 case NETDEV_DOWN: 1762 mlxsw_sp_netdevice_ipip_ol_down_event(mlxsw_sp, ol_dev); 1763 return 0; 1764 case NETDEV_CHANGEUPPER: 1765 chup = container_of(info, typeof(*chup), info); 1766 extack = info->extack; 1767 if (netif_is_l3_master(chup->upper_dev)) 1768 return mlxsw_sp_netdevice_ipip_ol_vrf_event(mlxsw_sp, 1769 ol_dev, 1770 extack); 1771 return 0; 1772 case NETDEV_CHANGE: 1773 extack = info->extack; 1774 return mlxsw_sp_netdevice_ipip_ol_change_event(mlxsw_sp, 1775 ol_dev, extack); 1776 case NETDEV_CHANGEMTU: 1777 return mlxsw_sp_netdevice_ipip_ol_update_mtu(mlxsw_sp, ol_dev); 1778 } 1779 return 0; 1780 } 1781 1782 static int 1783 __mlxsw_sp_netdevice_ipip_ul_event(struct mlxsw_sp *mlxsw_sp, 1784 struct mlxsw_sp_ipip_entry *ipip_entry, 1785 struct net_device *ul_dev, 1786 bool *demote_this, 1787 unsigned long event, 1788 struct netdev_notifier_info *info) 1789 { 1790 struct netdev_notifier_changeupper_info *chup; 1791 struct netlink_ext_ack *extack; 1792 1793 switch (event) { 1794 case NETDEV_CHANGEUPPER: 1795 chup = container_of(info, typeof(*chup), info); 1796 extack = info->extack; 1797 if (netif_is_l3_master(chup->upper_dev)) 1798 return mlxsw_sp_netdevice_ipip_ul_vrf_event(mlxsw_sp, 1799 ipip_entry, 1800 ul_dev, 1801 demote_this, 1802 extack); 1803 break; 1804 1805 case NETDEV_UP: 1806 return mlxsw_sp_netdevice_ipip_ul_up_event(mlxsw_sp, ipip_entry, 1807 ul_dev); 1808 case NETDEV_DOWN: 1809 return mlxsw_sp_netdevice_ipip_ul_down_event(mlxsw_sp, 1810 ipip_entry, 1811 ul_dev); 1812 } 1813 return 0; 1814 } 1815 1816 int 1817 mlxsw_sp_netdevice_ipip_ul_event(struct mlxsw_sp *mlxsw_sp, 1818 struct net_device *ul_dev, 1819 unsigned long event, 1820 struct netdev_notifier_info *info) 1821 { 1822 struct mlxsw_sp_ipip_entry *ipip_entry = NULL; 1823 int err; 1824 1825 while ((ipip_entry = mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp, 1826 ul_dev, 1827 ipip_entry))) { 1828 struct mlxsw_sp_ipip_entry *prev; 1829 bool demote_this = false; 1830 1831 err = __mlxsw_sp_netdevice_ipip_ul_event(mlxsw_sp, ipip_entry, 1832 ul_dev, &demote_this, 1833 event, info); 1834 if (err) { 1835 mlxsw_sp_ipip_demote_tunnel_by_ul_netdev(mlxsw_sp, 1836 ul_dev); 1837 return err; 1838 } 1839 1840 if (demote_this) { 1841 if (list_is_first(&ipip_entry->ipip_list_node, 1842 &mlxsw_sp->router->ipip_list)) 1843 prev = NULL; 1844 else 1845 /* This can't be cached from previous iteration, 1846 * because that entry could be gone now. 1847 */ 1848 prev = list_prev_entry(ipip_entry, 1849 ipip_list_node); 1850 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1851 ipip_entry = prev; 1852 } 1853 } 1854 1855 return 0; 1856 } 1857 1858 int mlxsw_sp_router_nve_promote_decap(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id, 1859 enum mlxsw_sp_l3proto ul_proto, 1860 const union mlxsw_sp_l3addr *ul_sip, 1861 u32 tunnel_index) 1862 { 1863 enum mlxsw_sp_fib_entry_type type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 1864 struct mlxsw_sp_fib_entry *fib_entry; 1865 int err; 1866 1867 /* It is valid to create a tunnel with a local IP and only later 1868 * assign this IP address to a local interface 1869 */ 1870 fib_entry = mlxsw_sp_router_ip2me_fib_entry_find(mlxsw_sp, ul_tb_id, 1871 ul_proto, ul_sip, 1872 type); 1873 if (!fib_entry) 1874 return 0; 1875 1876 fib_entry->decap.tunnel_index = tunnel_index; 1877 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP; 1878 1879 err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 1880 if (err) 1881 goto err_fib_entry_update; 1882 1883 return 0; 1884 1885 err_fib_entry_update: 1886 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 1887 mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 1888 return err; 1889 } 1890 1891 void mlxsw_sp_router_nve_demote_decap(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id, 1892 enum mlxsw_sp_l3proto ul_proto, 1893 const union mlxsw_sp_l3addr *ul_sip) 1894 { 1895 enum mlxsw_sp_fib_entry_type type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP; 1896 struct mlxsw_sp_fib_entry *fib_entry; 1897 1898 fib_entry = mlxsw_sp_router_ip2me_fib_entry_find(mlxsw_sp, ul_tb_id, 1899 ul_proto, ul_sip, 1900 type); 1901 if (!fib_entry) 1902 return; 1903 1904 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 1905 mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 1906 } 1907 1908 struct mlxsw_sp_neigh_key { 1909 struct neighbour *n; 1910 }; 1911 1912 struct mlxsw_sp_neigh_entry { 1913 struct list_head rif_list_node; 1914 struct rhash_head ht_node; 1915 struct mlxsw_sp_neigh_key key; 1916 u16 rif; 1917 bool connected; 1918 unsigned char ha[ETH_ALEN]; 1919 struct list_head nexthop_list; /* list of nexthops using 1920 * this neigh entry 1921 */ 1922 struct list_head nexthop_neighs_list_node; 1923 unsigned int counter_index; 1924 bool counter_valid; 1925 }; 1926 1927 static const struct rhashtable_params mlxsw_sp_neigh_ht_params = { 1928 .key_offset = offsetof(struct mlxsw_sp_neigh_entry, key), 1929 .head_offset = offsetof(struct mlxsw_sp_neigh_entry, ht_node), 1930 .key_len = sizeof(struct mlxsw_sp_neigh_key), 1931 }; 1932 1933 struct mlxsw_sp_neigh_entry * 1934 mlxsw_sp_rif_neigh_next(struct mlxsw_sp_rif *rif, 1935 struct mlxsw_sp_neigh_entry *neigh_entry) 1936 { 1937 if (!neigh_entry) { 1938 if (list_empty(&rif->neigh_list)) 1939 return NULL; 1940 else 1941 return list_first_entry(&rif->neigh_list, 1942 typeof(*neigh_entry), 1943 rif_list_node); 1944 } 1945 if (list_is_last(&neigh_entry->rif_list_node, &rif->neigh_list)) 1946 return NULL; 1947 return list_next_entry(neigh_entry, rif_list_node); 1948 } 1949 1950 int mlxsw_sp_neigh_entry_type(struct mlxsw_sp_neigh_entry *neigh_entry) 1951 { 1952 return neigh_entry->key.n->tbl->family; 1953 } 1954 1955 unsigned char * 1956 mlxsw_sp_neigh_entry_ha(struct mlxsw_sp_neigh_entry *neigh_entry) 1957 { 1958 return neigh_entry->ha; 1959 } 1960 1961 u32 mlxsw_sp_neigh4_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry) 1962 { 1963 struct neighbour *n; 1964 1965 n = neigh_entry->key.n; 1966 return ntohl(*((__be32 *) n->primary_key)); 1967 } 1968 1969 struct in6_addr * 1970 mlxsw_sp_neigh6_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry) 1971 { 1972 struct neighbour *n; 1973 1974 n = neigh_entry->key.n; 1975 return (struct in6_addr *) &n->primary_key; 1976 } 1977 1978 int mlxsw_sp_neigh_counter_get(struct mlxsw_sp *mlxsw_sp, 1979 struct mlxsw_sp_neigh_entry *neigh_entry, 1980 u64 *p_counter) 1981 { 1982 if (!neigh_entry->counter_valid) 1983 return -EINVAL; 1984 1985 return mlxsw_sp_flow_counter_get(mlxsw_sp, neigh_entry->counter_index, 1986 p_counter, NULL); 1987 } 1988 1989 static struct mlxsw_sp_neigh_entry * 1990 mlxsw_sp_neigh_entry_alloc(struct mlxsw_sp *mlxsw_sp, struct neighbour *n, 1991 u16 rif) 1992 { 1993 struct mlxsw_sp_neigh_entry *neigh_entry; 1994 1995 neigh_entry = kzalloc(sizeof(*neigh_entry), GFP_KERNEL); 1996 if (!neigh_entry) 1997 return NULL; 1998 1999 neigh_entry->key.n = n; 2000 neigh_entry->rif = rif; 2001 INIT_LIST_HEAD(&neigh_entry->nexthop_list); 2002 2003 return neigh_entry; 2004 } 2005 2006 static void mlxsw_sp_neigh_entry_free(struct mlxsw_sp_neigh_entry *neigh_entry) 2007 { 2008 kfree(neigh_entry); 2009 } 2010 2011 static int 2012 mlxsw_sp_neigh_entry_insert(struct mlxsw_sp *mlxsw_sp, 2013 struct mlxsw_sp_neigh_entry *neigh_entry) 2014 { 2015 return rhashtable_insert_fast(&mlxsw_sp->router->neigh_ht, 2016 &neigh_entry->ht_node, 2017 mlxsw_sp_neigh_ht_params); 2018 } 2019 2020 static void 2021 mlxsw_sp_neigh_entry_remove(struct mlxsw_sp *mlxsw_sp, 2022 struct mlxsw_sp_neigh_entry *neigh_entry) 2023 { 2024 rhashtable_remove_fast(&mlxsw_sp->router->neigh_ht, 2025 &neigh_entry->ht_node, 2026 mlxsw_sp_neigh_ht_params); 2027 } 2028 2029 static bool 2030 mlxsw_sp_neigh_counter_should_alloc(struct mlxsw_sp *mlxsw_sp, 2031 struct mlxsw_sp_neigh_entry *neigh_entry) 2032 { 2033 struct devlink *devlink; 2034 const char *table_name; 2035 2036 switch (mlxsw_sp_neigh_entry_type(neigh_entry)) { 2037 case AF_INET: 2038 table_name = MLXSW_SP_DPIPE_TABLE_NAME_HOST4; 2039 break; 2040 case AF_INET6: 2041 table_name = MLXSW_SP_DPIPE_TABLE_NAME_HOST6; 2042 break; 2043 default: 2044 WARN_ON(1); 2045 return false; 2046 } 2047 2048 devlink = priv_to_devlink(mlxsw_sp->core); 2049 return devlink_dpipe_table_counter_enabled(devlink, table_name); 2050 } 2051 2052 static void 2053 mlxsw_sp_neigh_counter_alloc(struct mlxsw_sp *mlxsw_sp, 2054 struct mlxsw_sp_neigh_entry *neigh_entry) 2055 { 2056 if (!mlxsw_sp_neigh_counter_should_alloc(mlxsw_sp, neigh_entry)) 2057 return; 2058 2059 if (mlxsw_sp_flow_counter_alloc(mlxsw_sp, &neigh_entry->counter_index)) 2060 return; 2061 2062 neigh_entry->counter_valid = true; 2063 } 2064 2065 static void 2066 mlxsw_sp_neigh_counter_free(struct mlxsw_sp *mlxsw_sp, 2067 struct mlxsw_sp_neigh_entry *neigh_entry) 2068 { 2069 if (!neigh_entry->counter_valid) 2070 return; 2071 mlxsw_sp_flow_counter_free(mlxsw_sp, 2072 neigh_entry->counter_index); 2073 neigh_entry->counter_valid = false; 2074 } 2075 2076 static struct mlxsw_sp_neigh_entry * 2077 mlxsw_sp_neigh_entry_create(struct mlxsw_sp *mlxsw_sp, struct neighbour *n) 2078 { 2079 struct mlxsw_sp_neigh_entry *neigh_entry; 2080 struct mlxsw_sp_rif *rif; 2081 int err; 2082 2083 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, n->dev); 2084 if (!rif) 2085 return ERR_PTR(-EINVAL); 2086 2087 neigh_entry = mlxsw_sp_neigh_entry_alloc(mlxsw_sp, n, rif->rif_index); 2088 if (!neigh_entry) 2089 return ERR_PTR(-ENOMEM); 2090 2091 err = mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry); 2092 if (err) 2093 goto err_neigh_entry_insert; 2094 2095 mlxsw_sp_neigh_counter_alloc(mlxsw_sp, neigh_entry); 2096 list_add(&neigh_entry->rif_list_node, &rif->neigh_list); 2097 2098 return neigh_entry; 2099 2100 err_neigh_entry_insert: 2101 mlxsw_sp_neigh_entry_free(neigh_entry); 2102 return ERR_PTR(err); 2103 } 2104 2105 static void 2106 mlxsw_sp_neigh_entry_destroy(struct mlxsw_sp *mlxsw_sp, 2107 struct mlxsw_sp_neigh_entry *neigh_entry) 2108 { 2109 list_del(&neigh_entry->rif_list_node); 2110 mlxsw_sp_neigh_counter_free(mlxsw_sp, neigh_entry); 2111 mlxsw_sp_neigh_entry_remove(mlxsw_sp, neigh_entry); 2112 mlxsw_sp_neigh_entry_free(neigh_entry); 2113 } 2114 2115 static struct mlxsw_sp_neigh_entry * 2116 mlxsw_sp_neigh_entry_lookup(struct mlxsw_sp *mlxsw_sp, struct neighbour *n) 2117 { 2118 struct mlxsw_sp_neigh_key key; 2119 2120 key.n = n; 2121 return rhashtable_lookup_fast(&mlxsw_sp->router->neigh_ht, 2122 &key, mlxsw_sp_neigh_ht_params); 2123 } 2124 2125 static void 2126 mlxsw_sp_router_neighs_update_interval_init(struct mlxsw_sp *mlxsw_sp) 2127 { 2128 unsigned long interval; 2129 2130 #if IS_ENABLED(CONFIG_IPV6) 2131 interval = min_t(unsigned long, 2132 NEIGH_VAR(&arp_tbl.parms, DELAY_PROBE_TIME), 2133 NEIGH_VAR(&nd_tbl.parms, DELAY_PROBE_TIME)); 2134 #else 2135 interval = NEIGH_VAR(&arp_tbl.parms, DELAY_PROBE_TIME); 2136 #endif 2137 mlxsw_sp->router->neighs_update.interval = jiffies_to_msecs(interval); 2138 } 2139 2140 static void mlxsw_sp_router_neigh_ent_ipv4_process(struct mlxsw_sp *mlxsw_sp, 2141 char *rauhtd_pl, 2142 int ent_index) 2143 { 2144 struct net_device *dev; 2145 struct neighbour *n; 2146 __be32 dipn; 2147 u32 dip; 2148 u16 rif; 2149 2150 mlxsw_reg_rauhtd_ent_ipv4_unpack(rauhtd_pl, ent_index, &rif, &dip); 2151 2152 if (!mlxsw_sp->router->rifs[rif]) { 2153 dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect RIF in neighbour entry\n"); 2154 return; 2155 } 2156 2157 dipn = htonl(dip); 2158 dev = mlxsw_sp->router->rifs[rif]->dev; 2159 n = neigh_lookup(&arp_tbl, &dipn, dev); 2160 if (!n) 2161 return; 2162 2163 netdev_dbg(dev, "Updating neighbour with IP=%pI4h\n", &dip); 2164 neigh_event_send(n, NULL); 2165 neigh_release(n); 2166 } 2167 2168 #if IS_ENABLED(CONFIG_IPV6) 2169 static void mlxsw_sp_router_neigh_ent_ipv6_process(struct mlxsw_sp *mlxsw_sp, 2170 char *rauhtd_pl, 2171 int rec_index) 2172 { 2173 struct net_device *dev; 2174 struct neighbour *n; 2175 struct in6_addr dip; 2176 u16 rif; 2177 2178 mlxsw_reg_rauhtd_ent_ipv6_unpack(rauhtd_pl, rec_index, &rif, 2179 (char *) &dip); 2180 2181 if (!mlxsw_sp->router->rifs[rif]) { 2182 dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect RIF in neighbour entry\n"); 2183 return; 2184 } 2185 2186 dev = mlxsw_sp->router->rifs[rif]->dev; 2187 n = neigh_lookup(&nd_tbl, &dip, dev); 2188 if (!n) 2189 return; 2190 2191 netdev_dbg(dev, "Updating neighbour with IP=%pI6c\n", &dip); 2192 neigh_event_send(n, NULL); 2193 neigh_release(n); 2194 } 2195 #else 2196 static void mlxsw_sp_router_neigh_ent_ipv6_process(struct mlxsw_sp *mlxsw_sp, 2197 char *rauhtd_pl, 2198 int rec_index) 2199 { 2200 } 2201 #endif 2202 2203 static void mlxsw_sp_router_neigh_rec_ipv4_process(struct mlxsw_sp *mlxsw_sp, 2204 char *rauhtd_pl, 2205 int rec_index) 2206 { 2207 u8 num_entries; 2208 int i; 2209 2210 num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl, 2211 rec_index); 2212 /* Hardware starts counting at 0, so add 1. */ 2213 num_entries++; 2214 2215 /* Each record consists of several neighbour entries. */ 2216 for (i = 0; i < num_entries; i++) { 2217 int ent_index; 2218 2219 ent_index = rec_index * MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC + i; 2220 mlxsw_sp_router_neigh_ent_ipv4_process(mlxsw_sp, rauhtd_pl, 2221 ent_index); 2222 } 2223 2224 } 2225 2226 static void mlxsw_sp_router_neigh_rec_ipv6_process(struct mlxsw_sp *mlxsw_sp, 2227 char *rauhtd_pl, 2228 int rec_index) 2229 { 2230 /* One record contains one entry. */ 2231 mlxsw_sp_router_neigh_ent_ipv6_process(mlxsw_sp, rauhtd_pl, 2232 rec_index); 2233 } 2234 2235 static void mlxsw_sp_router_neigh_rec_process(struct mlxsw_sp *mlxsw_sp, 2236 char *rauhtd_pl, int rec_index) 2237 { 2238 switch (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, rec_index)) { 2239 case MLXSW_REG_RAUHTD_TYPE_IPV4: 2240 mlxsw_sp_router_neigh_rec_ipv4_process(mlxsw_sp, rauhtd_pl, 2241 rec_index); 2242 break; 2243 case MLXSW_REG_RAUHTD_TYPE_IPV6: 2244 mlxsw_sp_router_neigh_rec_ipv6_process(mlxsw_sp, rauhtd_pl, 2245 rec_index); 2246 break; 2247 } 2248 } 2249 2250 static bool mlxsw_sp_router_rauhtd_is_full(char *rauhtd_pl) 2251 { 2252 u8 num_rec, last_rec_index, num_entries; 2253 2254 num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl); 2255 last_rec_index = num_rec - 1; 2256 2257 if (num_rec < MLXSW_REG_RAUHTD_REC_MAX_NUM) 2258 return false; 2259 if (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, last_rec_index) == 2260 MLXSW_REG_RAUHTD_TYPE_IPV6) 2261 return true; 2262 2263 num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl, 2264 last_rec_index); 2265 if (++num_entries == MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC) 2266 return true; 2267 return false; 2268 } 2269 2270 static int 2271 __mlxsw_sp_router_neighs_update_rauhtd(struct mlxsw_sp *mlxsw_sp, 2272 char *rauhtd_pl, 2273 enum mlxsw_reg_rauhtd_type type) 2274 { 2275 int i, num_rec; 2276 int err; 2277 2278 /* Make sure the neighbour's netdev isn't removed in the 2279 * process. 2280 */ 2281 rtnl_lock(); 2282 do { 2283 mlxsw_reg_rauhtd_pack(rauhtd_pl, type); 2284 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(rauhtd), 2285 rauhtd_pl); 2286 if (err) { 2287 dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to dump neighbour table\n"); 2288 break; 2289 } 2290 num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl); 2291 for (i = 0; i < num_rec; i++) 2292 mlxsw_sp_router_neigh_rec_process(mlxsw_sp, rauhtd_pl, 2293 i); 2294 } while (mlxsw_sp_router_rauhtd_is_full(rauhtd_pl)); 2295 rtnl_unlock(); 2296 2297 return err; 2298 } 2299 2300 static int mlxsw_sp_router_neighs_update_rauhtd(struct mlxsw_sp *mlxsw_sp) 2301 { 2302 enum mlxsw_reg_rauhtd_type type; 2303 char *rauhtd_pl; 2304 int err; 2305 2306 rauhtd_pl = kmalloc(MLXSW_REG_RAUHTD_LEN, GFP_KERNEL); 2307 if (!rauhtd_pl) 2308 return -ENOMEM; 2309 2310 type = MLXSW_REG_RAUHTD_TYPE_IPV4; 2311 err = __mlxsw_sp_router_neighs_update_rauhtd(mlxsw_sp, rauhtd_pl, type); 2312 if (err) 2313 goto out; 2314 2315 type = MLXSW_REG_RAUHTD_TYPE_IPV6; 2316 err = __mlxsw_sp_router_neighs_update_rauhtd(mlxsw_sp, rauhtd_pl, type); 2317 out: 2318 kfree(rauhtd_pl); 2319 return err; 2320 } 2321 2322 static void mlxsw_sp_router_neighs_update_nh(struct mlxsw_sp *mlxsw_sp) 2323 { 2324 struct mlxsw_sp_neigh_entry *neigh_entry; 2325 2326 /* Take RTNL mutex here to prevent lists from changes */ 2327 rtnl_lock(); 2328 list_for_each_entry(neigh_entry, &mlxsw_sp->router->nexthop_neighs_list, 2329 nexthop_neighs_list_node) 2330 /* If this neigh have nexthops, make the kernel think this neigh 2331 * is active regardless of the traffic. 2332 */ 2333 neigh_event_send(neigh_entry->key.n, NULL); 2334 rtnl_unlock(); 2335 } 2336 2337 static void 2338 mlxsw_sp_router_neighs_update_work_schedule(struct mlxsw_sp *mlxsw_sp) 2339 { 2340 unsigned long interval = mlxsw_sp->router->neighs_update.interval; 2341 2342 mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw, 2343 msecs_to_jiffies(interval)); 2344 } 2345 2346 static void mlxsw_sp_router_neighs_update_work(struct work_struct *work) 2347 { 2348 struct mlxsw_sp_router *router; 2349 int err; 2350 2351 router = container_of(work, struct mlxsw_sp_router, 2352 neighs_update.dw.work); 2353 err = mlxsw_sp_router_neighs_update_rauhtd(router->mlxsw_sp); 2354 if (err) 2355 dev_err(router->mlxsw_sp->bus_info->dev, "Could not update kernel for neigh activity"); 2356 2357 mlxsw_sp_router_neighs_update_nh(router->mlxsw_sp); 2358 2359 mlxsw_sp_router_neighs_update_work_schedule(router->mlxsw_sp); 2360 } 2361 2362 static void mlxsw_sp_router_probe_unresolved_nexthops(struct work_struct *work) 2363 { 2364 struct mlxsw_sp_neigh_entry *neigh_entry; 2365 struct mlxsw_sp_router *router; 2366 2367 router = container_of(work, struct mlxsw_sp_router, 2368 nexthop_probe_dw.work); 2369 /* Iterate over nexthop neighbours, find those who are unresolved and 2370 * send arp on them. This solves the chicken-egg problem when 2371 * the nexthop wouldn't get offloaded until the neighbor is resolved 2372 * but it wouldn't get resolved ever in case traffic is flowing in HW 2373 * using different nexthop. 2374 * 2375 * Take RTNL mutex here to prevent lists from changes. 2376 */ 2377 rtnl_lock(); 2378 list_for_each_entry(neigh_entry, &router->nexthop_neighs_list, 2379 nexthop_neighs_list_node) 2380 if (!neigh_entry->connected) 2381 neigh_event_send(neigh_entry->key.n, NULL); 2382 rtnl_unlock(); 2383 2384 mlxsw_core_schedule_dw(&router->nexthop_probe_dw, 2385 MLXSW_SP_UNRESOLVED_NH_PROBE_INTERVAL); 2386 } 2387 2388 static void 2389 mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp *mlxsw_sp, 2390 struct mlxsw_sp_neigh_entry *neigh_entry, 2391 bool removing, bool dead); 2392 2393 static enum mlxsw_reg_rauht_op mlxsw_sp_rauht_op(bool adding) 2394 { 2395 return adding ? MLXSW_REG_RAUHT_OP_WRITE_ADD : 2396 MLXSW_REG_RAUHT_OP_WRITE_DELETE; 2397 } 2398 2399 static int 2400 mlxsw_sp_router_neigh_entry_op4(struct mlxsw_sp *mlxsw_sp, 2401 struct mlxsw_sp_neigh_entry *neigh_entry, 2402 enum mlxsw_reg_rauht_op op) 2403 { 2404 struct neighbour *n = neigh_entry->key.n; 2405 u32 dip = ntohl(*((__be32 *) n->primary_key)); 2406 char rauht_pl[MLXSW_REG_RAUHT_LEN]; 2407 2408 mlxsw_reg_rauht_pack4(rauht_pl, op, neigh_entry->rif, neigh_entry->ha, 2409 dip); 2410 if (neigh_entry->counter_valid) 2411 mlxsw_reg_rauht_pack_counter(rauht_pl, 2412 neigh_entry->counter_index); 2413 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl); 2414 } 2415 2416 static int 2417 mlxsw_sp_router_neigh_entry_op6(struct mlxsw_sp *mlxsw_sp, 2418 struct mlxsw_sp_neigh_entry *neigh_entry, 2419 enum mlxsw_reg_rauht_op op) 2420 { 2421 struct neighbour *n = neigh_entry->key.n; 2422 char rauht_pl[MLXSW_REG_RAUHT_LEN]; 2423 const char *dip = n->primary_key; 2424 2425 mlxsw_reg_rauht_pack6(rauht_pl, op, neigh_entry->rif, neigh_entry->ha, 2426 dip); 2427 if (neigh_entry->counter_valid) 2428 mlxsw_reg_rauht_pack_counter(rauht_pl, 2429 neigh_entry->counter_index); 2430 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl); 2431 } 2432 2433 bool mlxsw_sp_neigh_ipv6_ignore(struct mlxsw_sp_neigh_entry *neigh_entry) 2434 { 2435 struct neighbour *n = neigh_entry->key.n; 2436 2437 /* Packets with a link-local destination address are trapped 2438 * after LPM lookup and never reach the neighbour table, so 2439 * there is no need to program such neighbours to the device. 2440 */ 2441 if (ipv6_addr_type((struct in6_addr *) &n->primary_key) & 2442 IPV6_ADDR_LINKLOCAL) 2443 return true; 2444 return false; 2445 } 2446 2447 static void 2448 mlxsw_sp_neigh_entry_update(struct mlxsw_sp *mlxsw_sp, 2449 struct mlxsw_sp_neigh_entry *neigh_entry, 2450 bool adding) 2451 { 2452 enum mlxsw_reg_rauht_op op = mlxsw_sp_rauht_op(adding); 2453 int err; 2454 2455 if (!adding && !neigh_entry->connected) 2456 return; 2457 neigh_entry->connected = adding; 2458 if (neigh_entry->key.n->tbl->family == AF_INET) { 2459 err = mlxsw_sp_router_neigh_entry_op4(mlxsw_sp, neigh_entry, 2460 op); 2461 if (err) 2462 return; 2463 } else if (neigh_entry->key.n->tbl->family == AF_INET6) { 2464 if (mlxsw_sp_neigh_ipv6_ignore(neigh_entry)) 2465 return; 2466 err = mlxsw_sp_router_neigh_entry_op6(mlxsw_sp, neigh_entry, 2467 op); 2468 if (err) 2469 return; 2470 } else { 2471 WARN_ON_ONCE(1); 2472 return; 2473 } 2474 2475 if (adding) 2476 neigh_entry->key.n->flags |= NTF_OFFLOADED; 2477 else 2478 neigh_entry->key.n->flags &= ~NTF_OFFLOADED; 2479 } 2480 2481 void 2482 mlxsw_sp_neigh_entry_counter_update(struct mlxsw_sp *mlxsw_sp, 2483 struct mlxsw_sp_neigh_entry *neigh_entry, 2484 bool adding) 2485 { 2486 if (adding) 2487 mlxsw_sp_neigh_counter_alloc(mlxsw_sp, neigh_entry); 2488 else 2489 mlxsw_sp_neigh_counter_free(mlxsw_sp, neigh_entry); 2490 mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, true); 2491 } 2492 2493 struct mlxsw_sp_netevent_work { 2494 struct work_struct work; 2495 struct mlxsw_sp *mlxsw_sp; 2496 struct neighbour *n; 2497 }; 2498 2499 static void mlxsw_sp_router_neigh_event_work(struct work_struct *work) 2500 { 2501 struct mlxsw_sp_netevent_work *net_work = 2502 container_of(work, struct mlxsw_sp_netevent_work, work); 2503 struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp; 2504 struct mlxsw_sp_neigh_entry *neigh_entry; 2505 struct neighbour *n = net_work->n; 2506 unsigned char ha[ETH_ALEN]; 2507 bool entry_connected; 2508 u8 nud_state, dead; 2509 2510 /* If these parameters are changed after we release the lock, 2511 * then we are guaranteed to receive another event letting us 2512 * know about it. 2513 */ 2514 read_lock_bh(&n->lock); 2515 memcpy(ha, n->ha, ETH_ALEN); 2516 nud_state = n->nud_state; 2517 dead = n->dead; 2518 read_unlock_bh(&n->lock); 2519 2520 rtnl_lock(); 2521 mlxsw_sp_span_respin(mlxsw_sp); 2522 2523 entry_connected = nud_state & NUD_VALID && !dead; 2524 neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n); 2525 if (!entry_connected && !neigh_entry) 2526 goto out; 2527 if (!neigh_entry) { 2528 neigh_entry = mlxsw_sp_neigh_entry_create(mlxsw_sp, n); 2529 if (IS_ERR(neigh_entry)) 2530 goto out; 2531 } 2532 2533 memcpy(neigh_entry->ha, ha, ETH_ALEN); 2534 mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, entry_connected); 2535 mlxsw_sp_nexthop_neigh_update(mlxsw_sp, neigh_entry, !entry_connected, 2536 dead); 2537 2538 if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list)) 2539 mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry); 2540 2541 out: 2542 rtnl_unlock(); 2543 neigh_release(n); 2544 kfree(net_work); 2545 } 2546 2547 static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp); 2548 2549 static void mlxsw_sp_router_mp_hash_event_work(struct work_struct *work) 2550 { 2551 struct mlxsw_sp_netevent_work *net_work = 2552 container_of(work, struct mlxsw_sp_netevent_work, work); 2553 struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp; 2554 2555 mlxsw_sp_mp_hash_init(mlxsw_sp); 2556 kfree(net_work); 2557 } 2558 2559 static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp); 2560 2561 static void mlxsw_sp_router_update_priority_work(struct work_struct *work) 2562 { 2563 struct mlxsw_sp_netevent_work *net_work = 2564 container_of(work, struct mlxsw_sp_netevent_work, work); 2565 struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp; 2566 2567 __mlxsw_sp_router_init(mlxsw_sp); 2568 kfree(net_work); 2569 } 2570 2571 static int mlxsw_sp_router_schedule_work(struct net *net, 2572 struct notifier_block *nb, 2573 void (*cb)(struct work_struct *)) 2574 { 2575 struct mlxsw_sp_netevent_work *net_work; 2576 struct mlxsw_sp_router *router; 2577 2578 router = container_of(nb, struct mlxsw_sp_router, netevent_nb); 2579 if (!net_eq(net, mlxsw_sp_net(router->mlxsw_sp))) 2580 return NOTIFY_DONE; 2581 2582 net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC); 2583 if (!net_work) 2584 return NOTIFY_BAD; 2585 2586 INIT_WORK(&net_work->work, cb); 2587 net_work->mlxsw_sp = router->mlxsw_sp; 2588 mlxsw_core_schedule_work(&net_work->work); 2589 return NOTIFY_DONE; 2590 } 2591 2592 static int mlxsw_sp_router_netevent_event(struct notifier_block *nb, 2593 unsigned long event, void *ptr) 2594 { 2595 struct mlxsw_sp_netevent_work *net_work; 2596 struct mlxsw_sp_port *mlxsw_sp_port; 2597 struct mlxsw_sp *mlxsw_sp; 2598 unsigned long interval; 2599 struct neigh_parms *p; 2600 struct neighbour *n; 2601 2602 switch (event) { 2603 case NETEVENT_DELAY_PROBE_TIME_UPDATE: 2604 p = ptr; 2605 2606 /* We don't care about changes in the default table. */ 2607 if (!p->dev || (p->tbl->family != AF_INET && 2608 p->tbl->family != AF_INET6)) 2609 return NOTIFY_DONE; 2610 2611 /* We are in atomic context and can't take RTNL mutex, 2612 * so use RCU variant to walk the device chain. 2613 */ 2614 mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(p->dev); 2615 if (!mlxsw_sp_port) 2616 return NOTIFY_DONE; 2617 2618 mlxsw_sp = mlxsw_sp_port->mlxsw_sp; 2619 interval = jiffies_to_msecs(NEIGH_VAR(p, DELAY_PROBE_TIME)); 2620 mlxsw_sp->router->neighs_update.interval = interval; 2621 2622 mlxsw_sp_port_dev_put(mlxsw_sp_port); 2623 break; 2624 case NETEVENT_NEIGH_UPDATE: 2625 n = ptr; 2626 2627 if (n->tbl->family != AF_INET && n->tbl->family != AF_INET6) 2628 return NOTIFY_DONE; 2629 2630 mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(n->dev); 2631 if (!mlxsw_sp_port) 2632 return NOTIFY_DONE; 2633 2634 net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC); 2635 if (!net_work) { 2636 mlxsw_sp_port_dev_put(mlxsw_sp_port); 2637 return NOTIFY_BAD; 2638 } 2639 2640 INIT_WORK(&net_work->work, mlxsw_sp_router_neigh_event_work); 2641 net_work->mlxsw_sp = mlxsw_sp_port->mlxsw_sp; 2642 net_work->n = n; 2643 2644 /* Take a reference to ensure the neighbour won't be 2645 * destructed until we drop the reference in delayed 2646 * work. 2647 */ 2648 neigh_clone(n); 2649 mlxsw_core_schedule_work(&net_work->work); 2650 mlxsw_sp_port_dev_put(mlxsw_sp_port); 2651 break; 2652 case NETEVENT_IPV4_MPATH_HASH_UPDATE: 2653 case NETEVENT_IPV6_MPATH_HASH_UPDATE: 2654 return mlxsw_sp_router_schedule_work(ptr, nb, 2655 mlxsw_sp_router_mp_hash_event_work); 2656 2657 case NETEVENT_IPV4_FWD_UPDATE_PRIORITY_UPDATE: 2658 return mlxsw_sp_router_schedule_work(ptr, nb, 2659 mlxsw_sp_router_update_priority_work); 2660 } 2661 2662 return NOTIFY_DONE; 2663 } 2664 2665 static int mlxsw_sp_neigh_init(struct mlxsw_sp *mlxsw_sp) 2666 { 2667 int err; 2668 2669 err = rhashtable_init(&mlxsw_sp->router->neigh_ht, 2670 &mlxsw_sp_neigh_ht_params); 2671 if (err) 2672 return err; 2673 2674 /* Initialize the polling interval according to the default 2675 * table. 2676 */ 2677 mlxsw_sp_router_neighs_update_interval_init(mlxsw_sp); 2678 2679 /* Create the delayed works for the activity_update */ 2680 INIT_DELAYED_WORK(&mlxsw_sp->router->neighs_update.dw, 2681 mlxsw_sp_router_neighs_update_work); 2682 INIT_DELAYED_WORK(&mlxsw_sp->router->nexthop_probe_dw, 2683 mlxsw_sp_router_probe_unresolved_nexthops); 2684 mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw, 0); 2685 mlxsw_core_schedule_dw(&mlxsw_sp->router->nexthop_probe_dw, 0); 2686 return 0; 2687 } 2688 2689 static void mlxsw_sp_neigh_fini(struct mlxsw_sp *mlxsw_sp) 2690 { 2691 cancel_delayed_work_sync(&mlxsw_sp->router->neighs_update.dw); 2692 cancel_delayed_work_sync(&mlxsw_sp->router->nexthop_probe_dw); 2693 rhashtable_destroy(&mlxsw_sp->router->neigh_ht); 2694 } 2695 2696 static void mlxsw_sp_neigh_rif_gone_sync(struct mlxsw_sp *mlxsw_sp, 2697 struct mlxsw_sp_rif *rif) 2698 { 2699 struct mlxsw_sp_neigh_entry *neigh_entry, *tmp; 2700 2701 list_for_each_entry_safe(neigh_entry, tmp, &rif->neigh_list, 2702 rif_list_node) { 2703 mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, false); 2704 mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry); 2705 } 2706 } 2707 2708 enum mlxsw_sp_nexthop_type { 2709 MLXSW_SP_NEXTHOP_TYPE_ETH, 2710 MLXSW_SP_NEXTHOP_TYPE_IPIP, 2711 }; 2712 2713 struct mlxsw_sp_nexthop_key { 2714 struct fib_nh *fib_nh; 2715 }; 2716 2717 struct mlxsw_sp_nexthop { 2718 struct list_head neigh_list_node; /* member of neigh entry list */ 2719 struct list_head rif_list_node; 2720 struct list_head router_list_node; 2721 struct mlxsw_sp_nexthop_group *nh_grp; /* pointer back to the group 2722 * this belongs to 2723 */ 2724 struct rhash_head ht_node; 2725 struct mlxsw_sp_nexthop_key key; 2726 unsigned char gw_addr[sizeof(struct in6_addr)]; 2727 int ifindex; 2728 int nh_weight; 2729 int norm_nh_weight; 2730 int num_adj_entries; 2731 struct mlxsw_sp_rif *rif; 2732 u8 should_offload:1, /* set indicates this neigh is connected and 2733 * should be put to KVD linear area of this group. 2734 */ 2735 offloaded:1, /* set in case the neigh is actually put into 2736 * KVD linear area of this group. 2737 */ 2738 update:1; /* set indicates that MAC of this neigh should be 2739 * updated in HW 2740 */ 2741 enum mlxsw_sp_nexthop_type type; 2742 union { 2743 struct mlxsw_sp_neigh_entry *neigh_entry; 2744 struct mlxsw_sp_ipip_entry *ipip_entry; 2745 }; 2746 unsigned int counter_index; 2747 bool counter_valid; 2748 }; 2749 2750 struct mlxsw_sp_nexthop_group { 2751 void *priv; 2752 struct rhash_head ht_node; 2753 struct list_head fib_list; /* list of fib entries that use this group */ 2754 struct neigh_table *neigh_tbl; 2755 u8 adj_index_valid:1, 2756 gateway:1; /* routes using the group use a gateway */ 2757 u32 adj_index; 2758 u16 ecmp_size; 2759 u16 count; 2760 int sum_norm_weight; 2761 struct mlxsw_sp_nexthop nexthops[0]; 2762 #define nh_rif nexthops[0].rif 2763 }; 2764 2765 void mlxsw_sp_nexthop_counter_alloc(struct mlxsw_sp *mlxsw_sp, 2766 struct mlxsw_sp_nexthop *nh) 2767 { 2768 struct devlink *devlink; 2769 2770 devlink = priv_to_devlink(mlxsw_sp->core); 2771 if (!devlink_dpipe_table_counter_enabled(devlink, 2772 MLXSW_SP_DPIPE_TABLE_NAME_ADJ)) 2773 return; 2774 2775 if (mlxsw_sp_flow_counter_alloc(mlxsw_sp, &nh->counter_index)) 2776 return; 2777 2778 nh->counter_valid = true; 2779 } 2780 2781 void mlxsw_sp_nexthop_counter_free(struct mlxsw_sp *mlxsw_sp, 2782 struct mlxsw_sp_nexthop *nh) 2783 { 2784 if (!nh->counter_valid) 2785 return; 2786 mlxsw_sp_flow_counter_free(mlxsw_sp, nh->counter_index); 2787 nh->counter_valid = false; 2788 } 2789 2790 int mlxsw_sp_nexthop_counter_get(struct mlxsw_sp *mlxsw_sp, 2791 struct mlxsw_sp_nexthop *nh, u64 *p_counter) 2792 { 2793 if (!nh->counter_valid) 2794 return -EINVAL; 2795 2796 return mlxsw_sp_flow_counter_get(mlxsw_sp, nh->counter_index, 2797 p_counter, NULL); 2798 } 2799 2800 struct mlxsw_sp_nexthop *mlxsw_sp_nexthop_next(struct mlxsw_sp_router *router, 2801 struct mlxsw_sp_nexthop *nh) 2802 { 2803 if (!nh) { 2804 if (list_empty(&router->nexthop_list)) 2805 return NULL; 2806 else 2807 return list_first_entry(&router->nexthop_list, 2808 typeof(*nh), router_list_node); 2809 } 2810 if (list_is_last(&nh->router_list_node, &router->nexthop_list)) 2811 return NULL; 2812 return list_next_entry(nh, router_list_node); 2813 } 2814 2815 bool mlxsw_sp_nexthop_offload(struct mlxsw_sp_nexthop *nh) 2816 { 2817 return nh->offloaded; 2818 } 2819 2820 unsigned char *mlxsw_sp_nexthop_ha(struct mlxsw_sp_nexthop *nh) 2821 { 2822 if (!nh->offloaded) 2823 return NULL; 2824 return nh->neigh_entry->ha; 2825 } 2826 2827 int mlxsw_sp_nexthop_indexes(struct mlxsw_sp_nexthop *nh, u32 *p_adj_index, 2828 u32 *p_adj_size, u32 *p_adj_hash_index) 2829 { 2830 struct mlxsw_sp_nexthop_group *nh_grp = nh->nh_grp; 2831 u32 adj_hash_index = 0; 2832 int i; 2833 2834 if (!nh->offloaded || !nh_grp->adj_index_valid) 2835 return -EINVAL; 2836 2837 *p_adj_index = nh_grp->adj_index; 2838 *p_adj_size = nh_grp->ecmp_size; 2839 2840 for (i = 0; i < nh_grp->count; i++) { 2841 struct mlxsw_sp_nexthop *nh_iter = &nh_grp->nexthops[i]; 2842 2843 if (nh_iter == nh) 2844 break; 2845 if (nh_iter->offloaded) 2846 adj_hash_index += nh_iter->num_adj_entries; 2847 } 2848 2849 *p_adj_hash_index = adj_hash_index; 2850 return 0; 2851 } 2852 2853 struct mlxsw_sp_rif *mlxsw_sp_nexthop_rif(struct mlxsw_sp_nexthop *nh) 2854 { 2855 return nh->rif; 2856 } 2857 2858 bool mlxsw_sp_nexthop_group_has_ipip(struct mlxsw_sp_nexthop *nh) 2859 { 2860 struct mlxsw_sp_nexthop_group *nh_grp = nh->nh_grp; 2861 int i; 2862 2863 for (i = 0; i < nh_grp->count; i++) { 2864 struct mlxsw_sp_nexthop *nh_iter = &nh_grp->nexthops[i]; 2865 2866 if (nh_iter->type == MLXSW_SP_NEXTHOP_TYPE_IPIP) 2867 return true; 2868 } 2869 return false; 2870 } 2871 2872 static struct fib_info * 2873 mlxsw_sp_nexthop4_group_fi(const struct mlxsw_sp_nexthop_group *nh_grp) 2874 { 2875 return nh_grp->priv; 2876 } 2877 2878 struct mlxsw_sp_nexthop_group_cmp_arg { 2879 enum mlxsw_sp_l3proto proto; 2880 union { 2881 struct fib_info *fi; 2882 struct mlxsw_sp_fib6_entry *fib6_entry; 2883 }; 2884 }; 2885 2886 static bool 2887 mlxsw_sp_nexthop6_group_has_nexthop(const struct mlxsw_sp_nexthop_group *nh_grp, 2888 const struct in6_addr *gw, int ifindex, 2889 int weight) 2890 { 2891 int i; 2892 2893 for (i = 0; i < nh_grp->count; i++) { 2894 const struct mlxsw_sp_nexthop *nh; 2895 2896 nh = &nh_grp->nexthops[i]; 2897 if (nh->ifindex == ifindex && nh->nh_weight == weight && 2898 ipv6_addr_equal(gw, (struct in6_addr *) nh->gw_addr)) 2899 return true; 2900 } 2901 2902 return false; 2903 } 2904 2905 static bool 2906 mlxsw_sp_nexthop6_group_cmp(const struct mlxsw_sp_nexthop_group *nh_grp, 2907 const struct mlxsw_sp_fib6_entry *fib6_entry) 2908 { 2909 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 2910 2911 if (nh_grp->count != fib6_entry->nrt6) 2912 return false; 2913 2914 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 2915 struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh; 2916 struct in6_addr *gw; 2917 int ifindex, weight; 2918 2919 ifindex = fib6_nh->fib_nh_dev->ifindex; 2920 weight = fib6_nh->fib_nh_weight; 2921 gw = &fib6_nh->fib_nh_gw6; 2922 if (!mlxsw_sp_nexthop6_group_has_nexthop(nh_grp, gw, ifindex, 2923 weight)) 2924 return false; 2925 } 2926 2927 return true; 2928 } 2929 2930 static int 2931 mlxsw_sp_nexthop_group_cmp(struct rhashtable_compare_arg *arg, const void *ptr) 2932 { 2933 const struct mlxsw_sp_nexthop_group_cmp_arg *cmp_arg = arg->key; 2934 const struct mlxsw_sp_nexthop_group *nh_grp = ptr; 2935 2936 switch (cmp_arg->proto) { 2937 case MLXSW_SP_L3_PROTO_IPV4: 2938 return cmp_arg->fi != mlxsw_sp_nexthop4_group_fi(nh_grp); 2939 case MLXSW_SP_L3_PROTO_IPV6: 2940 return !mlxsw_sp_nexthop6_group_cmp(nh_grp, 2941 cmp_arg->fib6_entry); 2942 default: 2943 WARN_ON(1); 2944 return 1; 2945 } 2946 } 2947 2948 static int 2949 mlxsw_sp_nexthop_group_type(const struct mlxsw_sp_nexthop_group *nh_grp) 2950 { 2951 return nh_grp->neigh_tbl->family; 2952 } 2953 2954 static u32 mlxsw_sp_nexthop_group_hash_obj(const void *data, u32 len, u32 seed) 2955 { 2956 const struct mlxsw_sp_nexthop_group *nh_grp = data; 2957 const struct mlxsw_sp_nexthop *nh; 2958 struct fib_info *fi; 2959 unsigned int val; 2960 int i; 2961 2962 switch (mlxsw_sp_nexthop_group_type(nh_grp)) { 2963 case AF_INET: 2964 fi = mlxsw_sp_nexthop4_group_fi(nh_grp); 2965 return jhash(&fi, sizeof(fi), seed); 2966 case AF_INET6: 2967 val = nh_grp->count; 2968 for (i = 0; i < nh_grp->count; i++) { 2969 nh = &nh_grp->nexthops[i]; 2970 val ^= jhash(&nh->ifindex, sizeof(nh->ifindex), seed); 2971 } 2972 return jhash(&val, sizeof(val), seed); 2973 default: 2974 WARN_ON(1); 2975 return 0; 2976 } 2977 } 2978 2979 static u32 2980 mlxsw_sp_nexthop6_group_hash(struct mlxsw_sp_fib6_entry *fib6_entry, u32 seed) 2981 { 2982 unsigned int val = fib6_entry->nrt6; 2983 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 2984 struct net_device *dev; 2985 2986 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 2987 dev = mlxsw_sp_rt6->rt->fib6_nh->fib_nh_dev; 2988 val ^= jhash(&dev->ifindex, sizeof(dev->ifindex), seed); 2989 } 2990 2991 return jhash(&val, sizeof(val), seed); 2992 } 2993 2994 static u32 2995 mlxsw_sp_nexthop_group_hash(const void *data, u32 len, u32 seed) 2996 { 2997 const struct mlxsw_sp_nexthop_group_cmp_arg *cmp_arg = data; 2998 2999 switch (cmp_arg->proto) { 3000 case MLXSW_SP_L3_PROTO_IPV4: 3001 return jhash(&cmp_arg->fi, sizeof(cmp_arg->fi), seed); 3002 case MLXSW_SP_L3_PROTO_IPV6: 3003 return mlxsw_sp_nexthop6_group_hash(cmp_arg->fib6_entry, seed); 3004 default: 3005 WARN_ON(1); 3006 return 0; 3007 } 3008 } 3009 3010 static const struct rhashtable_params mlxsw_sp_nexthop_group_ht_params = { 3011 .head_offset = offsetof(struct mlxsw_sp_nexthop_group, ht_node), 3012 .hashfn = mlxsw_sp_nexthop_group_hash, 3013 .obj_hashfn = mlxsw_sp_nexthop_group_hash_obj, 3014 .obj_cmpfn = mlxsw_sp_nexthop_group_cmp, 3015 }; 3016 3017 static int mlxsw_sp_nexthop_group_insert(struct mlxsw_sp *mlxsw_sp, 3018 struct mlxsw_sp_nexthop_group *nh_grp) 3019 { 3020 if (mlxsw_sp_nexthop_group_type(nh_grp) == AF_INET6 && 3021 !nh_grp->gateway) 3022 return 0; 3023 3024 return rhashtable_insert_fast(&mlxsw_sp->router->nexthop_group_ht, 3025 &nh_grp->ht_node, 3026 mlxsw_sp_nexthop_group_ht_params); 3027 } 3028 3029 static void mlxsw_sp_nexthop_group_remove(struct mlxsw_sp *mlxsw_sp, 3030 struct mlxsw_sp_nexthop_group *nh_grp) 3031 { 3032 if (mlxsw_sp_nexthop_group_type(nh_grp) == AF_INET6 && 3033 !nh_grp->gateway) 3034 return; 3035 3036 rhashtable_remove_fast(&mlxsw_sp->router->nexthop_group_ht, 3037 &nh_grp->ht_node, 3038 mlxsw_sp_nexthop_group_ht_params); 3039 } 3040 3041 static struct mlxsw_sp_nexthop_group * 3042 mlxsw_sp_nexthop4_group_lookup(struct mlxsw_sp *mlxsw_sp, 3043 struct fib_info *fi) 3044 { 3045 struct mlxsw_sp_nexthop_group_cmp_arg cmp_arg; 3046 3047 cmp_arg.proto = MLXSW_SP_L3_PROTO_IPV4; 3048 cmp_arg.fi = fi; 3049 return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht, 3050 &cmp_arg, 3051 mlxsw_sp_nexthop_group_ht_params); 3052 } 3053 3054 static struct mlxsw_sp_nexthop_group * 3055 mlxsw_sp_nexthop6_group_lookup(struct mlxsw_sp *mlxsw_sp, 3056 struct mlxsw_sp_fib6_entry *fib6_entry) 3057 { 3058 struct mlxsw_sp_nexthop_group_cmp_arg cmp_arg; 3059 3060 cmp_arg.proto = MLXSW_SP_L3_PROTO_IPV6; 3061 cmp_arg.fib6_entry = fib6_entry; 3062 return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht, 3063 &cmp_arg, 3064 mlxsw_sp_nexthop_group_ht_params); 3065 } 3066 3067 static const struct rhashtable_params mlxsw_sp_nexthop_ht_params = { 3068 .key_offset = offsetof(struct mlxsw_sp_nexthop, key), 3069 .head_offset = offsetof(struct mlxsw_sp_nexthop, ht_node), 3070 .key_len = sizeof(struct mlxsw_sp_nexthop_key), 3071 }; 3072 3073 static int mlxsw_sp_nexthop_insert(struct mlxsw_sp *mlxsw_sp, 3074 struct mlxsw_sp_nexthop *nh) 3075 { 3076 return rhashtable_insert_fast(&mlxsw_sp->router->nexthop_ht, 3077 &nh->ht_node, mlxsw_sp_nexthop_ht_params); 3078 } 3079 3080 static void mlxsw_sp_nexthop_remove(struct mlxsw_sp *mlxsw_sp, 3081 struct mlxsw_sp_nexthop *nh) 3082 { 3083 rhashtable_remove_fast(&mlxsw_sp->router->nexthop_ht, &nh->ht_node, 3084 mlxsw_sp_nexthop_ht_params); 3085 } 3086 3087 static struct mlxsw_sp_nexthop * 3088 mlxsw_sp_nexthop_lookup(struct mlxsw_sp *mlxsw_sp, 3089 struct mlxsw_sp_nexthop_key key) 3090 { 3091 return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_ht, &key, 3092 mlxsw_sp_nexthop_ht_params); 3093 } 3094 3095 static int mlxsw_sp_adj_index_mass_update_vr(struct mlxsw_sp *mlxsw_sp, 3096 const struct mlxsw_sp_fib *fib, 3097 u32 adj_index, u16 ecmp_size, 3098 u32 new_adj_index, 3099 u16 new_ecmp_size) 3100 { 3101 char raleu_pl[MLXSW_REG_RALEU_LEN]; 3102 3103 mlxsw_reg_raleu_pack(raleu_pl, 3104 (enum mlxsw_reg_ralxx_protocol) fib->proto, 3105 fib->vr->id, adj_index, ecmp_size, new_adj_index, 3106 new_ecmp_size); 3107 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raleu), raleu_pl); 3108 } 3109 3110 static int mlxsw_sp_adj_index_mass_update(struct mlxsw_sp *mlxsw_sp, 3111 struct mlxsw_sp_nexthop_group *nh_grp, 3112 u32 old_adj_index, u16 old_ecmp_size) 3113 { 3114 struct mlxsw_sp_fib_entry *fib_entry; 3115 struct mlxsw_sp_fib *fib = NULL; 3116 int err; 3117 3118 list_for_each_entry(fib_entry, &nh_grp->fib_list, nexthop_group_node) { 3119 if (fib == fib_entry->fib_node->fib) 3120 continue; 3121 fib = fib_entry->fib_node->fib; 3122 err = mlxsw_sp_adj_index_mass_update_vr(mlxsw_sp, fib, 3123 old_adj_index, 3124 old_ecmp_size, 3125 nh_grp->adj_index, 3126 nh_grp->ecmp_size); 3127 if (err) 3128 return err; 3129 } 3130 return 0; 3131 } 3132 3133 static int __mlxsw_sp_nexthop_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index, 3134 struct mlxsw_sp_nexthop *nh) 3135 { 3136 struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry; 3137 char ratr_pl[MLXSW_REG_RATR_LEN]; 3138 3139 mlxsw_reg_ratr_pack(ratr_pl, MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY, 3140 true, MLXSW_REG_RATR_TYPE_ETHERNET, 3141 adj_index, neigh_entry->rif); 3142 mlxsw_reg_ratr_eth_entry_pack(ratr_pl, neigh_entry->ha); 3143 if (nh->counter_valid) 3144 mlxsw_reg_ratr_counter_pack(ratr_pl, nh->counter_index, true); 3145 else 3146 mlxsw_reg_ratr_counter_pack(ratr_pl, 0, false); 3147 3148 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl); 3149 } 3150 3151 int mlxsw_sp_nexthop_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index, 3152 struct mlxsw_sp_nexthop *nh) 3153 { 3154 int i; 3155 3156 for (i = 0; i < nh->num_adj_entries; i++) { 3157 int err; 3158 3159 err = __mlxsw_sp_nexthop_update(mlxsw_sp, adj_index + i, nh); 3160 if (err) 3161 return err; 3162 } 3163 3164 return 0; 3165 } 3166 3167 static int __mlxsw_sp_nexthop_ipip_update(struct mlxsw_sp *mlxsw_sp, 3168 u32 adj_index, 3169 struct mlxsw_sp_nexthop *nh) 3170 { 3171 const struct mlxsw_sp_ipip_ops *ipip_ops; 3172 3173 ipip_ops = mlxsw_sp->router->ipip_ops_arr[nh->ipip_entry->ipipt]; 3174 return ipip_ops->nexthop_update(mlxsw_sp, adj_index, nh->ipip_entry); 3175 } 3176 3177 static int mlxsw_sp_nexthop_ipip_update(struct mlxsw_sp *mlxsw_sp, 3178 u32 adj_index, 3179 struct mlxsw_sp_nexthop *nh) 3180 { 3181 int i; 3182 3183 for (i = 0; i < nh->num_adj_entries; i++) { 3184 int err; 3185 3186 err = __mlxsw_sp_nexthop_ipip_update(mlxsw_sp, adj_index + i, 3187 nh); 3188 if (err) 3189 return err; 3190 } 3191 3192 return 0; 3193 } 3194 3195 static int 3196 mlxsw_sp_nexthop_group_update(struct mlxsw_sp *mlxsw_sp, 3197 struct mlxsw_sp_nexthop_group *nh_grp, 3198 bool reallocate) 3199 { 3200 u32 adj_index = nh_grp->adj_index; /* base */ 3201 struct mlxsw_sp_nexthop *nh; 3202 int i; 3203 int err; 3204 3205 for (i = 0; i < nh_grp->count; i++) { 3206 nh = &nh_grp->nexthops[i]; 3207 3208 if (!nh->should_offload) { 3209 nh->offloaded = 0; 3210 continue; 3211 } 3212 3213 if (nh->update || reallocate) { 3214 switch (nh->type) { 3215 case MLXSW_SP_NEXTHOP_TYPE_ETH: 3216 err = mlxsw_sp_nexthop_update 3217 (mlxsw_sp, adj_index, nh); 3218 break; 3219 case MLXSW_SP_NEXTHOP_TYPE_IPIP: 3220 err = mlxsw_sp_nexthop_ipip_update 3221 (mlxsw_sp, adj_index, nh); 3222 break; 3223 } 3224 if (err) 3225 return err; 3226 nh->update = 0; 3227 nh->offloaded = 1; 3228 } 3229 adj_index += nh->num_adj_entries; 3230 } 3231 return 0; 3232 } 3233 3234 static bool 3235 mlxsw_sp_fib_node_entry_is_first(const struct mlxsw_sp_fib_node *fib_node, 3236 const struct mlxsw_sp_fib_entry *fib_entry); 3237 3238 static int 3239 mlxsw_sp_nexthop_fib_entries_update(struct mlxsw_sp *mlxsw_sp, 3240 struct mlxsw_sp_nexthop_group *nh_grp) 3241 { 3242 struct mlxsw_sp_fib_entry *fib_entry; 3243 int err; 3244 3245 list_for_each_entry(fib_entry, &nh_grp->fib_list, nexthop_group_node) { 3246 if (!mlxsw_sp_fib_node_entry_is_first(fib_entry->fib_node, 3247 fib_entry)) 3248 continue; 3249 err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 3250 if (err) 3251 return err; 3252 } 3253 return 0; 3254 } 3255 3256 static void 3257 mlxsw_sp_fib_entry_offload_refresh(struct mlxsw_sp_fib_entry *fib_entry, 3258 enum mlxsw_reg_ralue_op op, int err); 3259 3260 static void 3261 mlxsw_sp_nexthop_fib_entries_refresh(struct mlxsw_sp_nexthop_group *nh_grp) 3262 { 3263 enum mlxsw_reg_ralue_op op = MLXSW_REG_RALUE_OP_WRITE_WRITE; 3264 struct mlxsw_sp_fib_entry *fib_entry; 3265 3266 list_for_each_entry(fib_entry, &nh_grp->fib_list, nexthop_group_node) { 3267 if (!mlxsw_sp_fib_node_entry_is_first(fib_entry->fib_node, 3268 fib_entry)) 3269 continue; 3270 mlxsw_sp_fib_entry_offload_refresh(fib_entry, op, 0); 3271 } 3272 } 3273 3274 static void mlxsw_sp_adj_grp_size_round_up(u16 *p_adj_grp_size) 3275 { 3276 /* Valid sizes for an adjacency group are: 3277 * 1-64, 512, 1024, 2048 and 4096. 3278 */ 3279 if (*p_adj_grp_size <= 64) 3280 return; 3281 else if (*p_adj_grp_size <= 512) 3282 *p_adj_grp_size = 512; 3283 else if (*p_adj_grp_size <= 1024) 3284 *p_adj_grp_size = 1024; 3285 else if (*p_adj_grp_size <= 2048) 3286 *p_adj_grp_size = 2048; 3287 else 3288 *p_adj_grp_size = 4096; 3289 } 3290 3291 static void mlxsw_sp_adj_grp_size_round_down(u16 *p_adj_grp_size, 3292 unsigned int alloc_size) 3293 { 3294 if (alloc_size >= 4096) 3295 *p_adj_grp_size = 4096; 3296 else if (alloc_size >= 2048) 3297 *p_adj_grp_size = 2048; 3298 else if (alloc_size >= 1024) 3299 *p_adj_grp_size = 1024; 3300 else if (alloc_size >= 512) 3301 *p_adj_grp_size = 512; 3302 } 3303 3304 static int mlxsw_sp_fix_adj_grp_size(struct mlxsw_sp *mlxsw_sp, 3305 u16 *p_adj_grp_size) 3306 { 3307 unsigned int alloc_size; 3308 int err; 3309 3310 /* Round up the requested group size to the next size supported 3311 * by the device and make sure the request can be satisfied. 3312 */ 3313 mlxsw_sp_adj_grp_size_round_up(p_adj_grp_size); 3314 err = mlxsw_sp_kvdl_alloc_count_query(mlxsw_sp, 3315 MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 3316 *p_adj_grp_size, &alloc_size); 3317 if (err) 3318 return err; 3319 /* It is possible the allocation results in more allocated 3320 * entries than requested. Try to use as much of them as 3321 * possible. 3322 */ 3323 mlxsw_sp_adj_grp_size_round_down(p_adj_grp_size, alloc_size); 3324 3325 return 0; 3326 } 3327 3328 static void 3329 mlxsw_sp_nexthop_group_normalize(struct mlxsw_sp_nexthop_group *nh_grp) 3330 { 3331 int i, g = 0, sum_norm_weight = 0; 3332 struct mlxsw_sp_nexthop *nh; 3333 3334 for (i = 0; i < nh_grp->count; i++) { 3335 nh = &nh_grp->nexthops[i]; 3336 3337 if (!nh->should_offload) 3338 continue; 3339 if (g > 0) 3340 g = gcd(nh->nh_weight, g); 3341 else 3342 g = nh->nh_weight; 3343 } 3344 3345 for (i = 0; i < nh_grp->count; i++) { 3346 nh = &nh_grp->nexthops[i]; 3347 3348 if (!nh->should_offload) 3349 continue; 3350 nh->norm_nh_weight = nh->nh_weight / g; 3351 sum_norm_weight += nh->norm_nh_weight; 3352 } 3353 3354 nh_grp->sum_norm_weight = sum_norm_weight; 3355 } 3356 3357 static void 3358 mlxsw_sp_nexthop_group_rebalance(struct mlxsw_sp_nexthop_group *nh_grp) 3359 { 3360 int total = nh_grp->sum_norm_weight; 3361 u16 ecmp_size = nh_grp->ecmp_size; 3362 int i, weight = 0, lower_bound = 0; 3363 3364 for (i = 0; i < nh_grp->count; i++) { 3365 struct mlxsw_sp_nexthop *nh = &nh_grp->nexthops[i]; 3366 int upper_bound; 3367 3368 if (!nh->should_offload) 3369 continue; 3370 weight += nh->norm_nh_weight; 3371 upper_bound = DIV_ROUND_CLOSEST(ecmp_size * weight, total); 3372 nh->num_adj_entries = upper_bound - lower_bound; 3373 lower_bound = upper_bound; 3374 } 3375 } 3376 3377 static void 3378 mlxsw_sp_nexthop_group_refresh(struct mlxsw_sp *mlxsw_sp, 3379 struct mlxsw_sp_nexthop_group *nh_grp) 3380 { 3381 u16 ecmp_size, old_ecmp_size; 3382 struct mlxsw_sp_nexthop *nh; 3383 bool offload_change = false; 3384 u32 adj_index; 3385 bool old_adj_index_valid; 3386 u32 old_adj_index; 3387 int i; 3388 int err; 3389 3390 if (!nh_grp->gateway) { 3391 mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp); 3392 return; 3393 } 3394 3395 for (i = 0; i < nh_grp->count; i++) { 3396 nh = &nh_grp->nexthops[i]; 3397 3398 if (nh->should_offload != nh->offloaded) { 3399 offload_change = true; 3400 if (nh->should_offload) 3401 nh->update = 1; 3402 } 3403 } 3404 if (!offload_change) { 3405 /* Nothing was added or removed, so no need to reallocate. Just 3406 * update MAC on existing adjacency indexes. 3407 */ 3408 err = mlxsw_sp_nexthop_group_update(mlxsw_sp, nh_grp, false); 3409 if (err) { 3410 dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n"); 3411 goto set_trap; 3412 } 3413 return; 3414 } 3415 mlxsw_sp_nexthop_group_normalize(nh_grp); 3416 if (!nh_grp->sum_norm_weight) 3417 /* No neigh of this group is connected so we just set 3418 * the trap and let everthing flow through kernel. 3419 */ 3420 goto set_trap; 3421 3422 ecmp_size = nh_grp->sum_norm_weight; 3423 err = mlxsw_sp_fix_adj_grp_size(mlxsw_sp, &ecmp_size); 3424 if (err) 3425 /* No valid allocation size available. */ 3426 goto set_trap; 3427 3428 err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 3429 ecmp_size, &adj_index); 3430 if (err) { 3431 /* We ran out of KVD linear space, just set the 3432 * trap and let everything flow through kernel. 3433 */ 3434 dev_warn(mlxsw_sp->bus_info->dev, "Failed to allocate KVD linear area for nexthop group.\n"); 3435 goto set_trap; 3436 } 3437 old_adj_index_valid = nh_grp->adj_index_valid; 3438 old_adj_index = nh_grp->adj_index; 3439 old_ecmp_size = nh_grp->ecmp_size; 3440 nh_grp->adj_index_valid = 1; 3441 nh_grp->adj_index = adj_index; 3442 nh_grp->ecmp_size = ecmp_size; 3443 mlxsw_sp_nexthop_group_rebalance(nh_grp); 3444 err = mlxsw_sp_nexthop_group_update(mlxsw_sp, nh_grp, true); 3445 if (err) { 3446 dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n"); 3447 goto set_trap; 3448 } 3449 3450 if (!old_adj_index_valid) { 3451 /* The trap was set for fib entries, so we have to call 3452 * fib entry update to unset it and use adjacency index. 3453 */ 3454 err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp); 3455 if (err) { 3456 dev_warn(mlxsw_sp->bus_info->dev, "Failed to add adjacency index to fib entries.\n"); 3457 goto set_trap; 3458 } 3459 return; 3460 } 3461 3462 err = mlxsw_sp_adj_index_mass_update(mlxsw_sp, nh_grp, 3463 old_adj_index, old_ecmp_size); 3464 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 3465 old_ecmp_size, old_adj_index); 3466 if (err) { 3467 dev_warn(mlxsw_sp->bus_info->dev, "Failed to mass-update adjacency index for nexthop group.\n"); 3468 goto set_trap; 3469 } 3470 3471 /* Offload state within the group changed, so update the flags. */ 3472 mlxsw_sp_nexthop_fib_entries_refresh(nh_grp); 3473 3474 return; 3475 3476 set_trap: 3477 old_adj_index_valid = nh_grp->adj_index_valid; 3478 nh_grp->adj_index_valid = 0; 3479 for (i = 0; i < nh_grp->count; i++) { 3480 nh = &nh_grp->nexthops[i]; 3481 nh->offloaded = 0; 3482 } 3483 err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp); 3484 if (err) 3485 dev_warn(mlxsw_sp->bus_info->dev, "Failed to set traps for fib entries.\n"); 3486 if (old_adj_index_valid) 3487 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 3488 nh_grp->ecmp_size, nh_grp->adj_index); 3489 } 3490 3491 static void __mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp_nexthop *nh, 3492 bool removing) 3493 { 3494 if (!removing) 3495 nh->should_offload = 1; 3496 else 3497 nh->should_offload = 0; 3498 nh->update = 1; 3499 } 3500 3501 static int 3502 mlxsw_sp_nexthop_dead_neigh_replace(struct mlxsw_sp *mlxsw_sp, 3503 struct mlxsw_sp_neigh_entry *neigh_entry) 3504 { 3505 struct neighbour *n, *old_n = neigh_entry->key.n; 3506 struct mlxsw_sp_nexthop *nh; 3507 bool entry_connected; 3508 u8 nud_state, dead; 3509 int err; 3510 3511 nh = list_first_entry(&neigh_entry->nexthop_list, 3512 struct mlxsw_sp_nexthop, neigh_list_node); 3513 3514 n = neigh_lookup(nh->nh_grp->neigh_tbl, &nh->gw_addr, nh->rif->dev); 3515 if (!n) { 3516 n = neigh_create(nh->nh_grp->neigh_tbl, &nh->gw_addr, 3517 nh->rif->dev); 3518 if (IS_ERR(n)) 3519 return PTR_ERR(n); 3520 neigh_event_send(n, NULL); 3521 } 3522 3523 mlxsw_sp_neigh_entry_remove(mlxsw_sp, neigh_entry); 3524 neigh_entry->key.n = n; 3525 err = mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry); 3526 if (err) 3527 goto err_neigh_entry_insert; 3528 3529 read_lock_bh(&n->lock); 3530 nud_state = n->nud_state; 3531 dead = n->dead; 3532 read_unlock_bh(&n->lock); 3533 entry_connected = nud_state & NUD_VALID && !dead; 3534 3535 list_for_each_entry(nh, &neigh_entry->nexthop_list, 3536 neigh_list_node) { 3537 neigh_release(old_n); 3538 neigh_clone(n); 3539 __mlxsw_sp_nexthop_neigh_update(nh, !entry_connected); 3540 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp); 3541 } 3542 3543 neigh_release(n); 3544 3545 return 0; 3546 3547 err_neigh_entry_insert: 3548 neigh_entry->key.n = old_n; 3549 mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry); 3550 neigh_release(n); 3551 return err; 3552 } 3553 3554 static void 3555 mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp *mlxsw_sp, 3556 struct mlxsw_sp_neigh_entry *neigh_entry, 3557 bool removing, bool dead) 3558 { 3559 struct mlxsw_sp_nexthop *nh; 3560 3561 if (list_empty(&neigh_entry->nexthop_list)) 3562 return; 3563 3564 if (dead) { 3565 int err; 3566 3567 err = mlxsw_sp_nexthop_dead_neigh_replace(mlxsw_sp, 3568 neigh_entry); 3569 if (err) 3570 dev_err(mlxsw_sp->bus_info->dev, "Failed to replace dead neigh\n"); 3571 return; 3572 } 3573 3574 list_for_each_entry(nh, &neigh_entry->nexthop_list, 3575 neigh_list_node) { 3576 __mlxsw_sp_nexthop_neigh_update(nh, removing); 3577 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp); 3578 } 3579 } 3580 3581 static void mlxsw_sp_nexthop_rif_init(struct mlxsw_sp_nexthop *nh, 3582 struct mlxsw_sp_rif *rif) 3583 { 3584 if (nh->rif) 3585 return; 3586 3587 nh->rif = rif; 3588 list_add(&nh->rif_list_node, &rif->nexthop_list); 3589 } 3590 3591 static void mlxsw_sp_nexthop_rif_fini(struct mlxsw_sp_nexthop *nh) 3592 { 3593 if (!nh->rif) 3594 return; 3595 3596 list_del(&nh->rif_list_node); 3597 nh->rif = NULL; 3598 } 3599 3600 static int mlxsw_sp_nexthop_neigh_init(struct mlxsw_sp *mlxsw_sp, 3601 struct mlxsw_sp_nexthop *nh) 3602 { 3603 struct mlxsw_sp_neigh_entry *neigh_entry; 3604 struct neighbour *n; 3605 u8 nud_state, dead; 3606 int err; 3607 3608 if (!nh->nh_grp->gateway || nh->neigh_entry) 3609 return 0; 3610 3611 /* Take a reference of neigh here ensuring that neigh would 3612 * not be destructed before the nexthop entry is finished. 3613 * The reference is taken either in neigh_lookup() or 3614 * in neigh_create() in case n is not found. 3615 */ 3616 n = neigh_lookup(nh->nh_grp->neigh_tbl, &nh->gw_addr, nh->rif->dev); 3617 if (!n) { 3618 n = neigh_create(nh->nh_grp->neigh_tbl, &nh->gw_addr, 3619 nh->rif->dev); 3620 if (IS_ERR(n)) 3621 return PTR_ERR(n); 3622 neigh_event_send(n, NULL); 3623 } 3624 neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n); 3625 if (!neigh_entry) { 3626 neigh_entry = mlxsw_sp_neigh_entry_create(mlxsw_sp, n); 3627 if (IS_ERR(neigh_entry)) { 3628 err = -EINVAL; 3629 goto err_neigh_entry_create; 3630 } 3631 } 3632 3633 /* If that is the first nexthop connected to that neigh, add to 3634 * nexthop_neighs_list 3635 */ 3636 if (list_empty(&neigh_entry->nexthop_list)) 3637 list_add_tail(&neigh_entry->nexthop_neighs_list_node, 3638 &mlxsw_sp->router->nexthop_neighs_list); 3639 3640 nh->neigh_entry = neigh_entry; 3641 list_add_tail(&nh->neigh_list_node, &neigh_entry->nexthop_list); 3642 read_lock_bh(&n->lock); 3643 nud_state = n->nud_state; 3644 dead = n->dead; 3645 read_unlock_bh(&n->lock); 3646 __mlxsw_sp_nexthop_neigh_update(nh, !(nud_state & NUD_VALID && !dead)); 3647 3648 return 0; 3649 3650 err_neigh_entry_create: 3651 neigh_release(n); 3652 return err; 3653 } 3654 3655 static void mlxsw_sp_nexthop_neigh_fini(struct mlxsw_sp *mlxsw_sp, 3656 struct mlxsw_sp_nexthop *nh) 3657 { 3658 struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry; 3659 struct neighbour *n; 3660 3661 if (!neigh_entry) 3662 return; 3663 n = neigh_entry->key.n; 3664 3665 __mlxsw_sp_nexthop_neigh_update(nh, true); 3666 list_del(&nh->neigh_list_node); 3667 nh->neigh_entry = NULL; 3668 3669 /* If that is the last nexthop connected to that neigh, remove from 3670 * nexthop_neighs_list 3671 */ 3672 if (list_empty(&neigh_entry->nexthop_list)) 3673 list_del(&neigh_entry->nexthop_neighs_list_node); 3674 3675 if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list)) 3676 mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry); 3677 3678 neigh_release(n); 3679 } 3680 3681 static bool mlxsw_sp_ipip_netdev_ul_up(struct net_device *ol_dev) 3682 { 3683 struct net_device *ul_dev = __mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev); 3684 3685 return ul_dev ? (ul_dev->flags & IFF_UP) : true; 3686 } 3687 3688 static void mlxsw_sp_nexthop_ipip_init(struct mlxsw_sp *mlxsw_sp, 3689 struct mlxsw_sp_nexthop *nh, 3690 struct mlxsw_sp_ipip_entry *ipip_entry) 3691 { 3692 bool removing; 3693 3694 if (!nh->nh_grp->gateway || nh->ipip_entry) 3695 return; 3696 3697 nh->ipip_entry = ipip_entry; 3698 removing = !mlxsw_sp_ipip_netdev_ul_up(ipip_entry->ol_dev); 3699 __mlxsw_sp_nexthop_neigh_update(nh, removing); 3700 mlxsw_sp_nexthop_rif_init(nh, &ipip_entry->ol_lb->common); 3701 } 3702 3703 static void mlxsw_sp_nexthop_ipip_fini(struct mlxsw_sp *mlxsw_sp, 3704 struct mlxsw_sp_nexthop *nh) 3705 { 3706 struct mlxsw_sp_ipip_entry *ipip_entry = nh->ipip_entry; 3707 3708 if (!ipip_entry) 3709 return; 3710 3711 __mlxsw_sp_nexthop_neigh_update(nh, true); 3712 nh->ipip_entry = NULL; 3713 } 3714 3715 static bool mlxsw_sp_nexthop4_ipip_type(const struct mlxsw_sp *mlxsw_sp, 3716 const struct fib_nh *fib_nh, 3717 enum mlxsw_sp_ipip_type *p_ipipt) 3718 { 3719 struct net_device *dev = fib_nh->fib_nh_dev; 3720 3721 return dev && 3722 fib_nh->nh_parent->fib_type == RTN_UNICAST && 3723 mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, p_ipipt); 3724 } 3725 3726 static void mlxsw_sp_nexthop_type_fini(struct mlxsw_sp *mlxsw_sp, 3727 struct mlxsw_sp_nexthop *nh) 3728 { 3729 switch (nh->type) { 3730 case MLXSW_SP_NEXTHOP_TYPE_ETH: 3731 mlxsw_sp_nexthop_neigh_fini(mlxsw_sp, nh); 3732 mlxsw_sp_nexthop_rif_fini(nh); 3733 break; 3734 case MLXSW_SP_NEXTHOP_TYPE_IPIP: 3735 mlxsw_sp_nexthop_rif_fini(nh); 3736 mlxsw_sp_nexthop_ipip_fini(mlxsw_sp, nh); 3737 break; 3738 } 3739 } 3740 3741 static int mlxsw_sp_nexthop4_type_init(struct mlxsw_sp *mlxsw_sp, 3742 struct mlxsw_sp_nexthop *nh, 3743 struct fib_nh *fib_nh) 3744 { 3745 const struct mlxsw_sp_ipip_ops *ipip_ops; 3746 struct net_device *dev = fib_nh->fib_nh_dev; 3747 struct mlxsw_sp_ipip_entry *ipip_entry; 3748 struct mlxsw_sp_rif *rif; 3749 int err; 3750 3751 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev); 3752 if (ipip_entry) { 3753 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 3754 if (ipip_ops->can_offload(mlxsw_sp, dev, 3755 MLXSW_SP_L3_PROTO_IPV4)) { 3756 nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP; 3757 mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry); 3758 return 0; 3759 } 3760 } 3761 3762 nh->type = MLXSW_SP_NEXTHOP_TYPE_ETH; 3763 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 3764 if (!rif) 3765 return 0; 3766 3767 mlxsw_sp_nexthop_rif_init(nh, rif); 3768 err = mlxsw_sp_nexthop_neigh_init(mlxsw_sp, nh); 3769 if (err) 3770 goto err_neigh_init; 3771 3772 return 0; 3773 3774 err_neigh_init: 3775 mlxsw_sp_nexthop_rif_fini(nh); 3776 return err; 3777 } 3778 3779 static void mlxsw_sp_nexthop4_type_fini(struct mlxsw_sp *mlxsw_sp, 3780 struct mlxsw_sp_nexthop *nh) 3781 { 3782 mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); 3783 } 3784 3785 static int mlxsw_sp_nexthop4_init(struct mlxsw_sp *mlxsw_sp, 3786 struct mlxsw_sp_nexthop_group *nh_grp, 3787 struct mlxsw_sp_nexthop *nh, 3788 struct fib_nh *fib_nh) 3789 { 3790 struct net_device *dev = fib_nh->fib_nh_dev; 3791 struct in_device *in_dev; 3792 int err; 3793 3794 nh->nh_grp = nh_grp; 3795 nh->key.fib_nh = fib_nh; 3796 #ifdef CONFIG_IP_ROUTE_MULTIPATH 3797 nh->nh_weight = fib_nh->fib_nh_weight; 3798 #else 3799 nh->nh_weight = 1; 3800 #endif 3801 memcpy(&nh->gw_addr, &fib_nh->fib_nh_gw4, sizeof(fib_nh->fib_nh_gw4)); 3802 err = mlxsw_sp_nexthop_insert(mlxsw_sp, nh); 3803 if (err) 3804 return err; 3805 3806 mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh); 3807 list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list); 3808 3809 if (!dev) 3810 return 0; 3811 3812 in_dev = __in_dev_get_rtnl(dev); 3813 if (in_dev && IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) && 3814 fib_nh->fib_nh_flags & RTNH_F_LINKDOWN) 3815 return 0; 3816 3817 err = mlxsw_sp_nexthop4_type_init(mlxsw_sp, nh, fib_nh); 3818 if (err) 3819 goto err_nexthop_neigh_init; 3820 3821 return 0; 3822 3823 err_nexthop_neigh_init: 3824 mlxsw_sp_nexthop_remove(mlxsw_sp, nh); 3825 return err; 3826 } 3827 3828 static void mlxsw_sp_nexthop4_fini(struct mlxsw_sp *mlxsw_sp, 3829 struct mlxsw_sp_nexthop *nh) 3830 { 3831 mlxsw_sp_nexthop4_type_fini(mlxsw_sp, nh); 3832 list_del(&nh->router_list_node); 3833 mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh); 3834 mlxsw_sp_nexthop_remove(mlxsw_sp, nh); 3835 } 3836 3837 static void mlxsw_sp_nexthop4_event(struct mlxsw_sp *mlxsw_sp, 3838 unsigned long event, struct fib_nh *fib_nh) 3839 { 3840 struct mlxsw_sp_nexthop_key key; 3841 struct mlxsw_sp_nexthop *nh; 3842 3843 if (mlxsw_sp->router->aborted) 3844 return; 3845 3846 key.fib_nh = fib_nh; 3847 nh = mlxsw_sp_nexthop_lookup(mlxsw_sp, key); 3848 if (WARN_ON_ONCE(!nh)) 3849 return; 3850 3851 switch (event) { 3852 case FIB_EVENT_NH_ADD: 3853 mlxsw_sp_nexthop4_type_init(mlxsw_sp, nh, fib_nh); 3854 break; 3855 case FIB_EVENT_NH_DEL: 3856 mlxsw_sp_nexthop4_type_fini(mlxsw_sp, nh); 3857 break; 3858 } 3859 3860 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp); 3861 } 3862 3863 static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp, 3864 struct mlxsw_sp_rif *rif) 3865 { 3866 struct mlxsw_sp_nexthop *nh; 3867 bool removing; 3868 3869 list_for_each_entry(nh, &rif->nexthop_list, rif_list_node) { 3870 switch (nh->type) { 3871 case MLXSW_SP_NEXTHOP_TYPE_ETH: 3872 removing = false; 3873 break; 3874 case MLXSW_SP_NEXTHOP_TYPE_IPIP: 3875 removing = !mlxsw_sp_ipip_netdev_ul_up(rif->dev); 3876 break; 3877 default: 3878 WARN_ON(1); 3879 continue; 3880 } 3881 3882 __mlxsw_sp_nexthop_neigh_update(nh, removing); 3883 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp); 3884 } 3885 } 3886 3887 static void mlxsw_sp_nexthop_rif_migrate(struct mlxsw_sp *mlxsw_sp, 3888 struct mlxsw_sp_rif *old_rif, 3889 struct mlxsw_sp_rif *new_rif) 3890 { 3891 struct mlxsw_sp_nexthop *nh; 3892 3893 list_splice_init(&old_rif->nexthop_list, &new_rif->nexthop_list); 3894 list_for_each_entry(nh, &new_rif->nexthop_list, rif_list_node) 3895 nh->rif = new_rif; 3896 mlxsw_sp_nexthop_rif_update(mlxsw_sp, new_rif); 3897 } 3898 3899 static void mlxsw_sp_nexthop_rif_gone_sync(struct mlxsw_sp *mlxsw_sp, 3900 struct mlxsw_sp_rif *rif) 3901 { 3902 struct mlxsw_sp_nexthop *nh, *tmp; 3903 3904 list_for_each_entry_safe(nh, tmp, &rif->nexthop_list, rif_list_node) { 3905 mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); 3906 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp); 3907 } 3908 } 3909 3910 static bool mlxsw_sp_fi_is_gateway(const struct mlxsw_sp *mlxsw_sp, 3911 struct fib_info *fi) 3912 { 3913 const struct fib_nh *nh = fib_info_nh(fi, 0); 3914 3915 return nh->fib_nh_scope == RT_SCOPE_LINK || 3916 mlxsw_sp_nexthop4_ipip_type(mlxsw_sp, nh, NULL); 3917 } 3918 3919 static struct mlxsw_sp_nexthop_group * 3920 mlxsw_sp_nexthop4_group_create(struct mlxsw_sp *mlxsw_sp, struct fib_info *fi) 3921 { 3922 unsigned int nhs = fib_info_num_path(fi); 3923 struct mlxsw_sp_nexthop_group *nh_grp; 3924 struct mlxsw_sp_nexthop *nh; 3925 struct fib_nh *fib_nh; 3926 int i; 3927 int err; 3928 3929 nh_grp = kzalloc(struct_size(nh_grp, nexthops, nhs), GFP_KERNEL); 3930 if (!nh_grp) 3931 return ERR_PTR(-ENOMEM); 3932 nh_grp->priv = fi; 3933 INIT_LIST_HEAD(&nh_grp->fib_list); 3934 nh_grp->neigh_tbl = &arp_tbl; 3935 3936 nh_grp->gateway = mlxsw_sp_fi_is_gateway(mlxsw_sp, fi); 3937 nh_grp->count = nhs; 3938 fib_info_hold(fi); 3939 for (i = 0; i < nh_grp->count; i++) { 3940 nh = &nh_grp->nexthops[i]; 3941 fib_nh = fib_info_nh(fi, i); 3942 err = mlxsw_sp_nexthop4_init(mlxsw_sp, nh_grp, nh, fib_nh); 3943 if (err) 3944 goto err_nexthop4_init; 3945 } 3946 err = mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp); 3947 if (err) 3948 goto err_nexthop_group_insert; 3949 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 3950 return nh_grp; 3951 3952 err_nexthop_group_insert: 3953 err_nexthop4_init: 3954 for (i--; i >= 0; i--) { 3955 nh = &nh_grp->nexthops[i]; 3956 mlxsw_sp_nexthop4_fini(mlxsw_sp, nh); 3957 } 3958 fib_info_put(fi); 3959 kfree(nh_grp); 3960 return ERR_PTR(err); 3961 } 3962 3963 static void 3964 mlxsw_sp_nexthop4_group_destroy(struct mlxsw_sp *mlxsw_sp, 3965 struct mlxsw_sp_nexthop_group *nh_grp) 3966 { 3967 struct mlxsw_sp_nexthop *nh; 3968 int i; 3969 3970 mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp); 3971 for (i = 0; i < nh_grp->count; i++) { 3972 nh = &nh_grp->nexthops[i]; 3973 mlxsw_sp_nexthop4_fini(mlxsw_sp, nh); 3974 } 3975 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 3976 WARN_ON_ONCE(nh_grp->adj_index_valid); 3977 fib_info_put(mlxsw_sp_nexthop4_group_fi(nh_grp)); 3978 kfree(nh_grp); 3979 } 3980 3981 static int mlxsw_sp_nexthop4_group_get(struct mlxsw_sp *mlxsw_sp, 3982 struct mlxsw_sp_fib_entry *fib_entry, 3983 struct fib_info *fi) 3984 { 3985 struct mlxsw_sp_nexthop_group *nh_grp; 3986 3987 nh_grp = mlxsw_sp_nexthop4_group_lookup(mlxsw_sp, fi); 3988 if (!nh_grp) { 3989 nh_grp = mlxsw_sp_nexthop4_group_create(mlxsw_sp, fi); 3990 if (IS_ERR(nh_grp)) 3991 return PTR_ERR(nh_grp); 3992 } 3993 list_add_tail(&fib_entry->nexthop_group_node, &nh_grp->fib_list); 3994 fib_entry->nh_group = nh_grp; 3995 return 0; 3996 } 3997 3998 static void mlxsw_sp_nexthop4_group_put(struct mlxsw_sp *mlxsw_sp, 3999 struct mlxsw_sp_fib_entry *fib_entry) 4000 { 4001 struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 4002 4003 list_del(&fib_entry->nexthop_group_node); 4004 if (!list_empty(&nh_grp->fib_list)) 4005 return; 4006 mlxsw_sp_nexthop4_group_destroy(mlxsw_sp, nh_grp); 4007 } 4008 4009 static bool 4010 mlxsw_sp_fib4_entry_should_offload(const struct mlxsw_sp_fib_entry *fib_entry) 4011 { 4012 struct mlxsw_sp_fib4_entry *fib4_entry; 4013 4014 fib4_entry = container_of(fib_entry, struct mlxsw_sp_fib4_entry, 4015 common); 4016 return !fib4_entry->tos; 4017 } 4018 4019 static bool 4020 mlxsw_sp_fib_entry_should_offload(const struct mlxsw_sp_fib_entry *fib_entry) 4021 { 4022 struct mlxsw_sp_nexthop_group *nh_group = fib_entry->nh_group; 4023 4024 switch (fib_entry->fib_node->fib->proto) { 4025 case MLXSW_SP_L3_PROTO_IPV4: 4026 if (!mlxsw_sp_fib4_entry_should_offload(fib_entry)) 4027 return false; 4028 break; 4029 case MLXSW_SP_L3_PROTO_IPV6: 4030 break; 4031 } 4032 4033 switch (fib_entry->type) { 4034 case MLXSW_SP_FIB_ENTRY_TYPE_REMOTE: 4035 return !!nh_group->adj_index_valid; 4036 case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL: 4037 return !!nh_group->nh_rif; 4038 case MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE: 4039 case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP: 4040 case MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP: 4041 return true; 4042 default: 4043 return false; 4044 } 4045 } 4046 4047 static struct mlxsw_sp_nexthop * 4048 mlxsw_sp_rt6_nexthop(struct mlxsw_sp_nexthop_group *nh_grp, 4049 const struct mlxsw_sp_rt6 *mlxsw_sp_rt6) 4050 { 4051 int i; 4052 4053 for (i = 0; i < nh_grp->count; i++) { 4054 struct mlxsw_sp_nexthop *nh = &nh_grp->nexthops[i]; 4055 struct fib6_info *rt = mlxsw_sp_rt6->rt; 4056 4057 if (nh->rif && nh->rif->dev == rt->fib6_nh->fib_nh_dev && 4058 ipv6_addr_equal((const struct in6_addr *) &nh->gw_addr, 4059 &rt->fib6_nh->fib_nh_gw6)) 4060 return nh; 4061 continue; 4062 } 4063 4064 return NULL; 4065 } 4066 4067 static void 4068 mlxsw_sp_fib4_entry_offload_set(struct mlxsw_sp_fib_entry *fib_entry) 4069 { 4070 struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 4071 int i; 4072 4073 if (fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_LOCAL || 4074 fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE || 4075 fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP || 4076 fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP) { 4077 nh_grp->nexthops->key.fib_nh->fib_nh_flags |= RTNH_F_OFFLOAD; 4078 return; 4079 } 4080 4081 for (i = 0; i < nh_grp->count; i++) { 4082 struct mlxsw_sp_nexthop *nh = &nh_grp->nexthops[i]; 4083 4084 if (nh->offloaded) 4085 nh->key.fib_nh->fib_nh_flags |= RTNH_F_OFFLOAD; 4086 else 4087 nh->key.fib_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD; 4088 } 4089 } 4090 4091 static void 4092 mlxsw_sp_fib4_entry_offload_unset(struct mlxsw_sp_fib_entry *fib_entry) 4093 { 4094 struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 4095 int i; 4096 4097 if (!list_is_singular(&nh_grp->fib_list)) 4098 return; 4099 4100 for (i = 0; i < nh_grp->count; i++) { 4101 struct mlxsw_sp_nexthop *nh = &nh_grp->nexthops[i]; 4102 4103 nh->key.fib_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD; 4104 } 4105 } 4106 4107 static void 4108 mlxsw_sp_fib6_entry_offload_set(struct mlxsw_sp_fib_entry *fib_entry) 4109 { 4110 struct mlxsw_sp_fib6_entry *fib6_entry; 4111 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 4112 4113 fib6_entry = container_of(fib_entry, struct mlxsw_sp_fib6_entry, 4114 common); 4115 4116 if (fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_LOCAL || 4117 fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE) { 4118 list_first_entry(&fib6_entry->rt6_list, struct mlxsw_sp_rt6, 4119 list)->rt->fib6_nh->fib_nh_flags |= RTNH_F_OFFLOAD; 4120 return; 4121 } 4122 4123 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 4124 struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 4125 struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh; 4126 struct mlxsw_sp_nexthop *nh; 4127 4128 nh = mlxsw_sp_rt6_nexthop(nh_grp, mlxsw_sp_rt6); 4129 if (nh && nh->offloaded) 4130 fib6_nh->fib_nh_flags |= RTNH_F_OFFLOAD; 4131 else 4132 fib6_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD; 4133 } 4134 } 4135 4136 static void 4137 mlxsw_sp_fib6_entry_offload_unset(struct mlxsw_sp_fib_entry *fib_entry) 4138 { 4139 struct mlxsw_sp_fib6_entry *fib6_entry; 4140 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 4141 4142 fib6_entry = container_of(fib_entry, struct mlxsw_sp_fib6_entry, 4143 common); 4144 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 4145 struct fib6_info *rt = mlxsw_sp_rt6->rt; 4146 4147 rt->fib6_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD; 4148 } 4149 } 4150 4151 static void mlxsw_sp_fib_entry_offload_set(struct mlxsw_sp_fib_entry *fib_entry) 4152 { 4153 switch (fib_entry->fib_node->fib->proto) { 4154 case MLXSW_SP_L3_PROTO_IPV4: 4155 mlxsw_sp_fib4_entry_offload_set(fib_entry); 4156 break; 4157 case MLXSW_SP_L3_PROTO_IPV6: 4158 mlxsw_sp_fib6_entry_offload_set(fib_entry); 4159 break; 4160 } 4161 } 4162 4163 static void 4164 mlxsw_sp_fib_entry_offload_unset(struct mlxsw_sp_fib_entry *fib_entry) 4165 { 4166 switch (fib_entry->fib_node->fib->proto) { 4167 case MLXSW_SP_L3_PROTO_IPV4: 4168 mlxsw_sp_fib4_entry_offload_unset(fib_entry); 4169 break; 4170 case MLXSW_SP_L3_PROTO_IPV6: 4171 mlxsw_sp_fib6_entry_offload_unset(fib_entry); 4172 break; 4173 } 4174 } 4175 4176 static void 4177 mlxsw_sp_fib_entry_offload_refresh(struct mlxsw_sp_fib_entry *fib_entry, 4178 enum mlxsw_reg_ralue_op op, int err) 4179 { 4180 switch (op) { 4181 case MLXSW_REG_RALUE_OP_WRITE_DELETE: 4182 return mlxsw_sp_fib_entry_offload_unset(fib_entry); 4183 case MLXSW_REG_RALUE_OP_WRITE_WRITE: 4184 if (err) 4185 return; 4186 if (mlxsw_sp_fib_entry_should_offload(fib_entry)) 4187 mlxsw_sp_fib_entry_offload_set(fib_entry); 4188 else 4189 mlxsw_sp_fib_entry_offload_unset(fib_entry); 4190 return; 4191 default: 4192 return; 4193 } 4194 } 4195 4196 static void 4197 mlxsw_sp_fib_entry_ralue_pack(char *ralue_pl, 4198 const struct mlxsw_sp_fib_entry *fib_entry, 4199 enum mlxsw_reg_ralue_op op) 4200 { 4201 struct mlxsw_sp_fib *fib = fib_entry->fib_node->fib; 4202 enum mlxsw_reg_ralxx_protocol proto; 4203 u32 *p_dip; 4204 4205 proto = (enum mlxsw_reg_ralxx_protocol) fib->proto; 4206 4207 switch (fib->proto) { 4208 case MLXSW_SP_L3_PROTO_IPV4: 4209 p_dip = (u32 *) fib_entry->fib_node->key.addr; 4210 mlxsw_reg_ralue_pack4(ralue_pl, proto, op, fib->vr->id, 4211 fib_entry->fib_node->key.prefix_len, 4212 *p_dip); 4213 break; 4214 case MLXSW_SP_L3_PROTO_IPV6: 4215 mlxsw_reg_ralue_pack6(ralue_pl, proto, op, fib->vr->id, 4216 fib_entry->fib_node->key.prefix_len, 4217 fib_entry->fib_node->key.addr); 4218 break; 4219 } 4220 } 4221 4222 static int mlxsw_sp_adj_discard_write(struct mlxsw_sp *mlxsw_sp, u16 rif_index) 4223 { 4224 enum mlxsw_reg_ratr_trap_action trap_action; 4225 char ratr_pl[MLXSW_REG_RATR_LEN]; 4226 int err; 4227 4228 if (mlxsw_sp->router->adj_discard_index_valid) 4229 return 0; 4230 4231 err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1, 4232 &mlxsw_sp->router->adj_discard_index); 4233 if (err) 4234 return err; 4235 4236 trap_action = MLXSW_REG_RATR_TRAP_ACTION_DISCARD_ERRORS; 4237 mlxsw_reg_ratr_pack(ratr_pl, MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY, true, 4238 MLXSW_REG_RATR_TYPE_ETHERNET, 4239 mlxsw_sp->router->adj_discard_index, rif_index); 4240 mlxsw_reg_ratr_trap_action_set(ratr_pl, trap_action); 4241 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl); 4242 if (err) 4243 goto err_ratr_write; 4244 4245 mlxsw_sp->router->adj_discard_index_valid = true; 4246 4247 return 0; 4248 4249 err_ratr_write: 4250 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1, 4251 mlxsw_sp->router->adj_discard_index); 4252 return err; 4253 } 4254 4255 static int mlxsw_sp_fib_entry_op_remote(struct mlxsw_sp *mlxsw_sp, 4256 struct mlxsw_sp_fib_entry *fib_entry, 4257 enum mlxsw_reg_ralue_op op) 4258 { 4259 struct mlxsw_sp_nexthop_group *nh_group = fib_entry->nh_group; 4260 char ralue_pl[MLXSW_REG_RALUE_LEN]; 4261 enum mlxsw_reg_ralue_trap_action trap_action; 4262 u16 trap_id = 0; 4263 u32 adjacency_index = 0; 4264 u16 ecmp_size = 0; 4265 int err; 4266 4267 /* In case the nexthop group adjacency index is valid, use it 4268 * with provided ECMP size. Otherwise, setup trap and pass 4269 * traffic to kernel. 4270 */ 4271 if (mlxsw_sp_fib_entry_should_offload(fib_entry)) { 4272 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP; 4273 adjacency_index = fib_entry->nh_group->adj_index; 4274 ecmp_size = fib_entry->nh_group->ecmp_size; 4275 } else if (!nh_group->adj_index_valid && nh_group->count && 4276 nh_group->nh_rif) { 4277 err = mlxsw_sp_adj_discard_write(mlxsw_sp, 4278 nh_group->nh_rif->rif_index); 4279 if (err) 4280 return err; 4281 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP; 4282 adjacency_index = mlxsw_sp->router->adj_discard_index; 4283 ecmp_size = 1; 4284 } else { 4285 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP; 4286 trap_id = MLXSW_TRAP_ID_RTR_INGRESS0; 4287 } 4288 4289 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 4290 mlxsw_reg_ralue_act_remote_pack(ralue_pl, trap_action, trap_id, 4291 adjacency_index, ecmp_size); 4292 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 4293 } 4294 4295 static int mlxsw_sp_fib_entry_op_local(struct mlxsw_sp *mlxsw_sp, 4296 struct mlxsw_sp_fib_entry *fib_entry, 4297 enum mlxsw_reg_ralue_op op) 4298 { 4299 struct mlxsw_sp_rif *rif = fib_entry->nh_group->nh_rif; 4300 enum mlxsw_reg_ralue_trap_action trap_action; 4301 char ralue_pl[MLXSW_REG_RALUE_LEN]; 4302 u16 trap_id = 0; 4303 u16 rif_index = 0; 4304 4305 if (mlxsw_sp_fib_entry_should_offload(fib_entry)) { 4306 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP; 4307 rif_index = rif->rif_index; 4308 } else { 4309 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP; 4310 trap_id = MLXSW_TRAP_ID_RTR_INGRESS0; 4311 } 4312 4313 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 4314 mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, trap_id, 4315 rif_index); 4316 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 4317 } 4318 4319 static int mlxsw_sp_fib_entry_op_trap(struct mlxsw_sp *mlxsw_sp, 4320 struct mlxsw_sp_fib_entry *fib_entry, 4321 enum mlxsw_reg_ralue_op op) 4322 { 4323 char ralue_pl[MLXSW_REG_RALUE_LEN]; 4324 4325 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 4326 mlxsw_reg_ralue_act_ip2me_pack(ralue_pl); 4327 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 4328 } 4329 4330 static int mlxsw_sp_fib_entry_op_blackhole(struct mlxsw_sp *mlxsw_sp, 4331 struct mlxsw_sp_fib_entry *fib_entry, 4332 enum mlxsw_reg_ralue_op op) 4333 { 4334 enum mlxsw_reg_ralue_trap_action trap_action; 4335 char ralue_pl[MLXSW_REG_RALUE_LEN]; 4336 4337 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_DISCARD_ERROR; 4338 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 4339 mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, 0, 0); 4340 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 4341 } 4342 4343 static int 4344 mlxsw_sp_fib_entry_op_unreachable(struct mlxsw_sp *mlxsw_sp, 4345 struct mlxsw_sp_fib_entry *fib_entry, 4346 enum mlxsw_reg_ralue_op op) 4347 { 4348 enum mlxsw_reg_ralue_trap_action trap_action; 4349 char ralue_pl[MLXSW_REG_RALUE_LEN]; 4350 u16 trap_id; 4351 4352 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP; 4353 trap_id = MLXSW_TRAP_ID_RTR_INGRESS1; 4354 4355 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 4356 mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, trap_id, 0); 4357 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 4358 } 4359 4360 static int 4361 mlxsw_sp_fib_entry_op_ipip_decap(struct mlxsw_sp *mlxsw_sp, 4362 struct mlxsw_sp_fib_entry *fib_entry, 4363 enum mlxsw_reg_ralue_op op) 4364 { 4365 struct mlxsw_sp_ipip_entry *ipip_entry = fib_entry->decap.ipip_entry; 4366 const struct mlxsw_sp_ipip_ops *ipip_ops; 4367 4368 if (WARN_ON(!ipip_entry)) 4369 return -EINVAL; 4370 4371 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 4372 return ipip_ops->fib_entry_op(mlxsw_sp, ipip_entry, op, 4373 fib_entry->decap.tunnel_index); 4374 } 4375 4376 static int mlxsw_sp_fib_entry_op_nve_decap(struct mlxsw_sp *mlxsw_sp, 4377 struct mlxsw_sp_fib_entry *fib_entry, 4378 enum mlxsw_reg_ralue_op op) 4379 { 4380 char ralue_pl[MLXSW_REG_RALUE_LEN]; 4381 4382 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 4383 mlxsw_reg_ralue_act_ip2me_tun_pack(ralue_pl, 4384 fib_entry->decap.tunnel_index); 4385 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 4386 } 4387 4388 static int __mlxsw_sp_fib_entry_op(struct mlxsw_sp *mlxsw_sp, 4389 struct mlxsw_sp_fib_entry *fib_entry, 4390 enum mlxsw_reg_ralue_op op) 4391 { 4392 switch (fib_entry->type) { 4393 case MLXSW_SP_FIB_ENTRY_TYPE_REMOTE: 4394 return mlxsw_sp_fib_entry_op_remote(mlxsw_sp, fib_entry, op); 4395 case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL: 4396 return mlxsw_sp_fib_entry_op_local(mlxsw_sp, fib_entry, op); 4397 case MLXSW_SP_FIB_ENTRY_TYPE_TRAP: 4398 return mlxsw_sp_fib_entry_op_trap(mlxsw_sp, fib_entry, op); 4399 case MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE: 4400 return mlxsw_sp_fib_entry_op_blackhole(mlxsw_sp, fib_entry, op); 4401 case MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE: 4402 return mlxsw_sp_fib_entry_op_unreachable(mlxsw_sp, fib_entry, 4403 op); 4404 case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP: 4405 return mlxsw_sp_fib_entry_op_ipip_decap(mlxsw_sp, 4406 fib_entry, op); 4407 case MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP: 4408 return mlxsw_sp_fib_entry_op_nve_decap(mlxsw_sp, fib_entry, op); 4409 } 4410 return -EINVAL; 4411 } 4412 4413 static int mlxsw_sp_fib_entry_op(struct mlxsw_sp *mlxsw_sp, 4414 struct mlxsw_sp_fib_entry *fib_entry, 4415 enum mlxsw_reg_ralue_op op) 4416 { 4417 int err = __mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, op); 4418 4419 mlxsw_sp_fib_entry_offload_refresh(fib_entry, op, err); 4420 4421 return err; 4422 } 4423 4424 static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp, 4425 struct mlxsw_sp_fib_entry *fib_entry) 4426 { 4427 return mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, 4428 MLXSW_REG_RALUE_OP_WRITE_WRITE); 4429 } 4430 4431 static int mlxsw_sp_fib_entry_del(struct mlxsw_sp *mlxsw_sp, 4432 struct mlxsw_sp_fib_entry *fib_entry) 4433 { 4434 return mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, 4435 MLXSW_REG_RALUE_OP_WRITE_DELETE); 4436 } 4437 4438 static int 4439 mlxsw_sp_fib4_entry_type_set(struct mlxsw_sp *mlxsw_sp, 4440 const struct fib_entry_notifier_info *fen_info, 4441 struct mlxsw_sp_fib_entry *fib_entry) 4442 { 4443 struct net_device *dev = fib_info_nh(fen_info->fi, 0)->fib_nh_dev; 4444 union mlxsw_sp_l3addr dip = { .addr4 = htonl(fen_info->dst) }; 4445 u32 tb_id = mlxsw_sp_fix_tb_id(fen_info->tb_id); 4446 struct mlxsw_sp_ipip_entry *ipip_entry; 4447 struct fib_info *fi = fen_info->fi; 4448 4449 switch (fen_info->type) { 4450 case RTN_LOCAL: 4451 ipip_entry = mlxsw_sp_ipip_entry_find_by_decap(mlxsw_sp, dev, 4452 MLXSW_SP_L3_PROTO_IPV4, dip); 4453 if (ipip_entry && ipip_entry->ol_dev->flags & IFF_UP) { 4454 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP; 4455 return mlxsw_sp_fib_entry_decap_init(mlxsw_sp, 4456 fib_entry, 4457 ipip_entry); 4458 } 4459 if (mlxsw_sp_nve_ipv4_route_is_decap(mlxsw_sp, tb_id, 4460 dip.addr4)) { 4461 u32 t_index; 4462 4463 t_index = mlxsw_sp_nve_decap_tunnel_index_get(mlxsw_sp); 4464 fib_entry->decap.tunnel_index = t_index; 4465 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP; 4466 return 0; 4467 } 4468 /* fall through */ 4469 case RTN_BROADCAST: 4470 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 4471 return 0; 4472 case RTN_BLACKHOLE: 4473 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE; 4474 return 0; 4475 case RTN_UNREACHABLE: /* fall through */ 4476 case RTN_PROHIBIT: 4477 /* Packets hitting these routes need to be trapped, but 4478 * can do so with a lower priority than packets directed 4479 * at the host, so use action type local instead of trap. 4480 */ 4481 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE; 4482 return 0; 4483 case RTN_UNICAST: 4484 if (mlxsw_sp_fi_is_gateway(mlxsw_sp, fi)) 4485 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_REMOTE; 4486 else 4487 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL; 4488 return 0; 4489 default: 4490 return -EINVAL; 4491 } 4492 } 4493 4494 static struct mlxsw_sp_fib4_entry * 4495 mlxsw_sp_fib4_entry_create(struct mlxsw_sp *mlxsw_sp, 4496 struct mlxsw_sp_fib_node *fib_node, 4497 const struct fib_entry_notifier_info *fen_info) 4498 { 4499 struct mlxsw_sp_fib4_entry *fib4_entry; 4500 struct mlxsw_sp_fib_entry *fib_entry; 4501 int err; 4502 4503 fib4_entry = kzalloc(sizeof(*fib4_entry), GFP_KERNEL); 4504 if (!fib4_entry) 4505 return ERR_PTR(-ENOMEM); 4506 fib_entry = &fib4_entry->common; 4507 4508 err = mlxsw_sp_fib4_entry_type_set(mlxsw_sp, fen_info, fib_entry); 4509 if (err) 4510 goto err_fib4_entry_type_set; 4511 4512 err = mlxsw_sp_nexthop4_group_get(mlxsw_sp, fib_entry, fen_info->fi); 4513 if (err) 4514 goto err_nexthop4_group_get; 4515 4516 fib4_entry->prio = fen_info->fi->fib_priority; 4517 fib4_entry->tb_id = fen_info->tb_id; 4518 fib4_entry->type = fen_info->type; 4519 fib4_entry->tos = fen_info->tos; 4520 4521 fib_entry->fib_node = fib_node; 4522 4523 return fib4_entry; 4524 4525 err_nexthop4_group_get: 4526 err_fib4_entry_type_set: 4527 kfree(fib4_entry); 4528 return ERR_PTR(err); 4529 } 4530 4531 static void mlxsw_sp_fib4_entry_destroy(struct mlxsw_sp *mlxsw_sp, 4532 struct mlxsw_sp_fib4_entry *fib4_entry) 4533 { 4534 mlxsw_sp_nexthop4_group_put(mlxsw_sp, &fib4_entry->common); 4535 kfree(fib4_entry); 4536 } 4537 4538 static struct mlxsw_sp_fib4_entry * 4539 mlxsw_sp_fib4_entry_lookup(struct mlxsw_sp *mlxsw_sp, 4540 const struct fib_entry_notifier_info *fen_info) 4541 { 4542 struct mlxsw_sp_fib4_entry *fib4_entry; 4543 struct mlxsw_sp_fib_node *fib_node; 4544 struct mlxsw_sp_fib *fib; 4545 struct mlxsw_sp_vr *vr; 4546 4547 vr = mlxsw_sp_vr_find(mlxsw_sp, fen_info->tb_id); 4548 if (!vr) 4549 return NULL; 4550 fib = mlxsw_sp_vr_fib(vr, MLXSW_SP_L3_PROTO_IPV4); 4551 4552 fib_node = mlxsw_sp_fib_node_lookup(fib, &fen_info->dst, 4553 sizeof(fen_info->dst), 4554 fen_info->dst_len); 4555 if (!fib_node) 4556 return NULL; 4557 4558 list_for_each_entry(fib4_entry, &fib_node->entry_list, common.list) { 4559 if (fib4_entry->tb_id == fen_info->tb_id && 4560 fib4_entry->tos == fen_info->tos && 4561 fib4_entry->type == fen_info->type && 4562 mlxsw_sp_nexthop4_group_fi(fib4_entry->common.nh_group) == 4563 fen_info->fi) { 4564 return fib4_entry; 4565 } 4566 } 4567 4568 return NULL; 4569 } 4570 4571 static const struct rhashtable_params mlxsw_sp_fib_ht_params = { 4572 .key_offset = offsetof(struct mlxsw_sp_fib_node, key), 4573 .head_offset = offsetof(struct mlxsw_sp_fib_node, ht_node), 4574 .key_len = sizeof(struct mlxsw_sp_fib_key), 4575 .automatic_shrinking = true, 4576 }; 4577 4578 static int mlxsw_sp_fib_node_insert(struct mlxsw_sp_fib *fib, 4579 struct mlxsw_sp_fib_node *fib_node) 4580 { 4581 return rhashtable_insert_fast(&fib->ht, &fib_node->ht_node, 4582 mlxsw_sp_fib_ht_params); 4583 } 4584 4585 static void mlxsw_sp_fib_node_remove(struct mlxsw_sp_fib *fib, 4586 struct mlxsw_sp_fib_node *fib_node) 4587 { 4588 rhashtable_remove_fast(&fib->ht, &fib_node->ht_node, 4589 mlxsw_sp_fib_ht_params); 4590 } 4591 4592 static struct mlxsw_sp_fib_node * 4593 mlxsw_sp_fib_node_lookup(struct mlxsw_sp_fib *fib, const void *addr, 4594 size_t addr_len, unsigned char prefix_len) 4595 { 4596 struct mlxsw_sp_fib_key key; 4597 4598 memset(&key, 0, sizeof(key)); 4599 memcpy(key.addr, addr, addr_len); 4600 key.prefix_len = prefix_len; 4601 return rhashtable_lookup_fast(&fib->ht, &key, mlxsw_sp_fib_ht_params); 4602 } 4603 4604 static struct mlxsw_sp_fib_node * 4605 mlxsw_sp_fib_node_create(struct mlxsw_sp_fib *fib, const void *addr, 4606 size_t addr_len, unsigned char prefix_len) 4607 { 4608 struct mlxsw_sp_fib_node *fib_node; 4609 4610 fib_node = kzalloc(sizeof(*fib_node), GFP_KERNEL); 4611 if (!fib_node) 4612 return NULL; 4613 4614 INIT_LIST_HEAD(&fib_node->entry_list); 4615 list_add(&fib_node->list, &fib->node_list); 4616 memcpy(fib_node->key.addr, addr, addr_len); 4617 fib_node->key.prefix_len = prefix_len; 4618 4619 return fib_node; 4620 } 4621 4622 static void mlxsw_sp_fib_node_destroy(struct mlxsw_sp_fib_node *fib_node) 4623 { 4624 list_del(&fib_node->list); 4625 WARN_ON(!list_empty(&fib_node->entry_list)); 4626 kfree(fib_node); 4627 } 4628 4629 static bool 4630 mlxsw_sp_fib_node_entry_is_first(const struct mlxsw_sp_fib_node *fib_node, 4631 const struct mlxsw_sp_fib_entry *fib_entry) 4632 { 4633 return list_first_entry(&fib_node->entry_list, 4634 struct mlxsw_sp_fib_entry, list) == fib_entry; 4635 } 4636 4637 static int mlxsw_sp_fib_lpm_tree_link(struct mlxsw_sp *mlxsw_sp, 4638 struct mlxsw_sp_fib_node *fib_node) 4639 { 4640 struct mlxsw_sp_prefix_usage req_prefix_usage; 4641 struct mlxsw_sp_fib *fib = fib_node->fib; 4642 struct mlxsw_sp_lpm_tree *lpm_tree; 4643 int err; 4644 4645 lpm_tree = mlxsw_sp->router->lpm.proto_trees[fib->proto]; 4646 if (lpm_tree->prefix_ref_count[fib_node->key.prefix_len] != 0) 4647 goto out; 4648 4649 mlxsw_sp_prefix_usage_cpy(&req_prefix_usage, &lpm_tree->prefix_usage); 4650 mlxsw_sp_prefix_usage_set(&req_prefix_usage, fib_node->key.prefix_len); 4651 lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, 4652 fib->proto); 4653 if (IS_ERR(lpm_tree)) 4654 return PTR_ERR(lpm_tree); 4655 4656 err = mlxsw_sp_vrs_lpm_tree_replace(mlxsw_sp, fib, lpm_tree); 4657 if (err) 4658 goto err_lpm_tree_replace; 4659 4660 out: 4661 lpm_tree->prefix_ref_count[fib_node->key.prefix_len]++; 4662 return 0; 4663 4664 err_lpm_tree_replace: 4665 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 4666 return err; 4667 } 4668 4669 static void mlxsw_sp_fib_lpm_tree_unlink(struct mlxsw_sp *mlxsw_sp, 4670 struct mlxsw_sp_fib_node *fib_node) 4671 { 4672 struct mlxsw_sp_lpm_tree *lpm_tree = fib_node->fib->lpm_tree; 4673 struct mlxsw_sp_prefix_usage req_prefix_usage; 4674 struct mlxsw_sp_fib *fib = fib_node->fib; 4675 int err; 4676 4677 if (--lpm_tree->prefix_ref_count[fib_node->key.prefix_len] != 0) 4678 return; 4679 /* Try to construct a new LPM tree from the current prefix usage 4680 * minus the unused one. If we fail, continue using the old one. 4681 */ 4682 mlxsw_sp_prefix_usage_cpy(&req_prefix_usage, &lpm_tree->prefix_usage); 4683 mlxsw_sp_prefix_usage_clear(&req_prefix_usage, 4684 fib_node->key.prefix_len); 4685 lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, 4686 fib->proto); 4687 if (IS_ERR(lpm_tree)) 4688 return; 4689 4690 err = mlxsw_sp_vrs_lpm_tree_replace(mlxsw_sp, fib, lpm_tree); 4691 if (err) 4692 goto err_lpm_tree_replace; 4693 4694 return; 4695 4696 err_lpm_tree_replace: 4697 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 4698 } 4699 4700 static int mlxsw_sp_fib_node_init(struct mlxsw_sp *mlxsw_sp, 4701 struct mlxsw_sp_fib_node *fib_node, 4702 struct mlxsw_sp_fib *fib) 4703 { 4704 int err; 4705 4706 err = mlxsw_sp_fib_node_insert(fib, fib_node); 4707 if (err) 4708 return err; 4709 fib_node->fib = fib; 4710 4711 err = mlxsw_sp_fib_lpm_tree_link(mlxsw_sp, fib_node); 4712 if (err) 4713 goto err_fib_lpm_tree_link; 4714 4715 return 0; 4716 4717 err_fib_lpm_tree_link: 4718 fib_node->fib = NULL; 4719 mlxsw_sp_fib_node_remove(fib, fib_node); 4720 return err; 4721 } 4722 4723 static void mlxsw_sp_fib_node_fini(struct mlxsw_sp *mlxsw_sp, 4724 struct mlxsw_sp_fib_node *fib_node) 4725 { 4726 struct mlxsw_sp_fib *fib = fib_node->fib; 4727 4728 mlxsw_sp_fib_lpm_tree_unlink(mlxsw_sp, fib_node); 4729 fib_node->fib = NULL; 4730 mlxsw_sp_fib_node_remove(fib, fib_node); 4731 } 4732 4733 static struct mlxsw_sp_fib_node * 4734 mlxsw_sp_fib_node_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, const void *addr, 4735 size_t addr_len, unsigned char prefix_len, 4736 enum mlxsw_sp_l3proto proto) 4737 { 4738 struct mlxsw_sp_fib_node *fib_node; 4739 struct mlxsw_sp_fib *fib; 4740 struct mlxsw_sp_vr *vr; 4741 int err; 4742 4743 vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id, NULL); 4744 if (IS_ERR(vr)) 4745 return ERR_CAST(vr); 4746 fib = mlxsw_sp_vr_fib(vr, proto); 4747 4748 fib_node = mlxsw_sp_fib_node_lookup(fib, addr, addr_len, prefix_len); 4749 if (fib_node) 4750 return fib_node; 4751 4752 fib_node = mlxsw_sp_fib_node_create(fib, addr, addr_len, prefix_len); 4753 if (!fib_node) { 4754 err = -ENOMEM; 4755 goto err_fib_node_create; 4756 } 4757 4758 err = mlxsw_sp_fib_node_init(mlxsw_sp, fib_node, fib); 4759 if (err) 4760 goto err_fib_node_init; 4761 4762 return fib_node; 4763 4764 err_fib_node_init: 4765 mlxsw_sp_fib_node_destroy(fib_node); 4766 err_fib_node_create: 4767 mlxsw_sp_vr_put(mlxsw_sp, vr); 4768 return ERR_PTR(err); 4769 } 4770 4771 static void mlxsw_sp_fib_node_put(struct mlxsw_sp *mlxsw_sp, 4772 struct mlxsw_sp_fib_node *fib_node) 4773 { 4774 struct mlxsw_sp_vr *vr = fib_node->fib->vr; 4775 4776 if (!list_empty(&fib_node->entry_list)) 4777 return; 4778 mlxsw_sp_fib_node_fini(mlxsw_sp, fib_node); 4779 mlxsw_sp_fib_node_destroy(fib_node); 4780 mlxsw_sp_vr_put(mlxsw_sp, vr); 4781 } 4782 4783 static struct mlxsw_sp_fib4_entry * 4784 mlxsw_sp_fib4_node_entry_find(const struct mlxsw_sp_fib_node *fib_node, 4785 const struct mlxsw_sp_fib4_entry *new4_entry) 4786 { 4787 struct mlxsw_sp_fib4_entry *fib4_entry; 4788 4789 list_for_each_entry(fib4_entry, &fib_node->entry_list, common.list) { 4790 if (fib4_entry->tb_id > new4_entry->tb_id) 4791 continue; 4792 if (fib4_entry->tb_id != new4_entry->tb_id) 4793 break; 4794 if (fib4_entry->tos > new4_entry->tos) 4795 continue; 4796 if (fib4_entry->prio >= new4_entry->prio || 4797 fib4_entry->tos < new4_entry->tos) 4798 return fib4_entry; 4799 } 4800 4801 return NULL; 4802 } 4803 4804 static int 4805 mlxsw_sp_fib4_node_list_append(struct mlxsw_sp_fib4_entry *fib4_entry, 4806 struct mlxsw_sp_fib4_entry *new4_entry) 4807 { 4808 struct mlxsw_sp_fib_node *fib_node; 4809 4810 if (WARN_ON(!fib4_entry)) 4811 return -EINVAL; 4812 4813 fib_node = fib4_entry->common.fib_node; 4814 list_for_each_entry_from(fib4_entry, &fib_node->entry_list, 4815 common.list) { 4816 if (fib4_entry->tb_id != new4_entry->tb_id || 4817 fib4_entry->tos != new4_entry->tos || 4818 fib4_entry->prio != new4_entry->prio) 4819 break; 4820 } 4821 4822 list_add_tail(&new4_entry->common.list, &fib4_entry->common.list); 4823 return 0; 4824 } 4825 4826 static int 4827 mlxsw_sp_fib4_node_list_insert(struct mlxsw_sp_fib4_entry *new4_entry, 4828 bool replace, bool append) 4829 { 4830 struct mlxsw_sp_fib_node *fib_node = new4_entry->common.fib_node; 4831 struct mlxsw_sp_fib4_entry *fib4_entry; 4832 4833 fib4_entry = mlxsw_sp_fib4_node_entry_find(fib_node, new4_entry); 4834 4835 if (append) 4836 return mlxsw_sp_fib4_node_list_append(fib4_entry, new4_entry); 4837 if (replace && WARN_ON(!fib4_entry)) 4838 return -EINVAL; 4839 4840 /* Insert new entry before replaced one, so that we can later 4841 * remove the second. 4842 */ 4843 if (fib4_entry) { 4844 list_add_tail(&new4_entry->common.list, 4845 &fib4_entry->common.list); 4846 } else { 4847 struct mlxsw_sp_fib4_entry *last; 4848 4849 list_for_each_entry(last, &fib_node->entry_list, common.list) { 4850 if (new4_entry->tb_id > last->tb_id) 4851 break; 4852 fib4_entry = last; 4853 } 4854 4855 if (fib4_entry) 4856 list_add(&new4_entry->common.list, 4857 &fib4_entry->common.list); 4858 else 4859 list_add(&new4_entry->common.list, 4860 &fib_node->entry_list); 4861 } 4862 4863 return 0; 4864 } 4865 4866 static void 4867 mlxsw_sp_fib4_node_list_remove(struct mlxsw_sp_fib4_entry *fib4_entry) 4868 { 4869 list_del(&fib4_entry->common.list); 4870 } 4871 4872 static int mlxsw_sp_fib_node_entry_add(struct mlxsw_sp *mlxsw_sp, 4873 struct mlxsw_sp_fib_entry *fib_entry) 4874 { 4875 struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node; 4876 4877 if (!mlxsw_sp_fib_node_entry_is_first(fib_node, fib_entry)) 4878 return 0; 4879 4880 /* To prevent packet loss, overwrite the previously offloaded 4881 * entry. 4882 */ 4883 if (!list_is_singular(&fib_node->entry_list)) { 4884 enum mlxsw_reg_ralue_op op = MLXSW_REG_RALUE_OP_WRITE_DELETE; 4885 struct mlxsw_sp_fib_entry *n = list_next_entry(fib_entry, list); 4886 4887 mlxsw_sp_fib_entry_offload_refresh(n, op, 0); 4888 } 4889 4890 return mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 4891 } 4892 4893 static void mlxsw_sp_fib_node_entry_del(struct mlxsw_sp *mlxsw_sp, 4894 struct mlxsw_sp_fib_entry *fib_entry) 4895 { 4896 struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node; 4897 4898 if (!mlxsw_sp_fib_node_entry_is_first(fib_node, fib_entry)) 4899 return; 4900 4901 /* Promote the next entry by overwriting the deleted entry */ 4902 if (!list_is_singular(&fib_node->entry_list)) { 4903 struct mlxsw_sp_fib_entry *n = list_next_entry(fib_entry, list); 4904 enum mlxsw_reg_ralue_op op = MLXSW_REG_RALUE_OP_WRITE_DELETE; 4905 4906 mlxsw_sp_fib_entry_update(mlxsw_sp, n); 4907 mlxsw_sp_fib_entry_offload_refresh(fib_entry, op, 0); 4908 return; 4909 } 4910 4911 mlxsw_sp_fib_entry_del(mlxsw_sp, fib_entry); 4912 } 4913 4914 static int mlxsw_sp_fib4_node_entry_link(struct mlxsw_sp *mlxsw_sp, 4915 struct mlxsw_sp_fib4_entry *fib4_entry, 4916 bool replace, bool append) 4917 { 4918 int err; 4919 4920 err = mlxsw_sp_fib4_node_list_insert(fib4_entry, replace, append); 4921 if (err) 4922 return err; 4923 4924 err = mlxsw_sp_fib_node_entry_add(mlxsw_sp, &fib4_entry->common); 4925 if (err) 4926 goto err_fib_node_entry_add; 4927 4928 return 0; 4929 4930 err_fib_node_entry_add: 4931 mlxsw_sp_fib4_node_list_remove(fib4_entry); 4932 return err; 4933 } 4934 4935 static void 4936 mlxsw_sp_fib4_node_entry_unlink(struct mlxsw_sp *mlxsw_sp, 4937 struct mlxsw_sp_fib4_entry *fib4_entry) 4938 { 4939 mlxsw_sp_fib_node_entry_del(mlxsw_sp, &fib4_entry->common); 4940 mlxsw_sp_fib4_node_list_remove(fib4_entry); 4941 4942 if (fib4_entry->common.type == MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP) 4943 mlxsw_sp_fib_entry_decap_fini(mlxsw_sp, &fib4_entry->common); 4944 } 4945 4946 static void mlxsw_sp_fib4_entry_replace(struct mlxsw_sp *mlxsw_sp, 4947 struct mlxsw_sp_fib4_entry *fib4_entry, 4948 bool replace) 4949 { 4950 struct mlxsw_sp_fib_node *fib_node = fib4_entry->common.fib_node; 4951 struct mlxsw_sp_fib4_entry *replaced; 4952 4953 if (!replace) 4954 return; 4955 4956 /* We inserted the new entry before replaced one */ 4957 replaced = list_next_entry(fib4_entry, common.list); 4958 4959 mlxsw_sp_fib4_node_entry_unlink(mlxsw_sp, replaced); 4960 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, replaced); 4961 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 4962 } 4963 4964 static int 4965 mlxsw_sp_router_fib4_add(struct mlxsw_sp *mlxsw_sp, 4966 const struct fib_entry_notifier_info *fen_info, 4967 bool replace, bool append) 4968 { 4969 struct mlxsw_sp_fib4_entry *fib4_entry; 4970 struct mlxsw_sp_fib_node *fib_node; 4971 int err; 4972 4973 if (mlxsw_sp->router->aborted) 4974 return 0; 4975 4976 fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, fen_info->tb_id, 4977 &fen_info->dst, sizeof(fen_info->dst), 4978 fen_info->dst_len, 4979 MLXSW_SP_L3_PROTO_IPV4); 4980 if (IS_ERR(fib_node)) { 4981 dev_warn(mlxsw_sp->bus_info->dev, "Failed to get FIB node\n"); 4982 return PTR_ERR(fib_node); 4983 } 4984 4985 fib4_entry = mlxsw_sp_fib4_entry_create(mlxsw_sp, fib_node, fen_info); 4986 if (IS_ERR(fib4_entry)) { 4987 dev_warn(mlxsw_sp->bus_info->dev, "Failed to create FIB entry\n"); 4988 err = PTR_ERR(fib4_entry); 4989 goto err_fib4_entry_create; 4990 } 4991 4992 err = mlxsw_sp_fib4_node_entry_link(mlxsw_sp, fib4_entry, replace, 4993 append); 4994 if (err) { 4995 dev_warn(mlxsw_sp->bus_info->dev, "Failed to link FIB entry to node\n"); 4996 goto err_fib4_node_entry_link; 4997 } 4998 4999 mlxsw_sp_fib4_entry_replace(mlxsw_sp, fib4_entry, replace); 5000 5001 return 0; 5002 5003 err_fib4_node_entry_link: 5004 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); 5005 err_fib4_entry_create: 5006 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5007 return err; 5008 } 5009 5010 static void mlxsw_sp_router_fib4_del(struct mlxsw_sp *mlxsw_sp, 5011 struct fib_entry_notifier_info *fen_info) 5012 { 5013 struct mlxsw_sp_fib4_entry *fib4_entry; 5014 struct mlxsw_sp_fib_node *fib_node; 5015 5016 if (mlxsw_sp->router->aborted) 5017 return; 5018 5019 fib4_entry = mlxsw_sp_fib4_entry_lookup(mlxsw_sp, fen_info); 5020 if (WARN_ON(!fib4_entry)) 5021 return; 5022 fib_node = fib4_entry->common.fib_node; 5023 5024 mlxsw_sp_fib4_node_entry_unlink(mlxsw_sp, fib4_entry); 5025 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); 5026 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5027 } 5028 5029 static bool mlxsw_sp_fib6_rt_should_ignore(const struct fib6_info *rt) 5030 { 5031 /* Packets with link-local destination IP arriving to the router 5032 * are trapped to the CPU, so no need to program specific routes 5033 * for them. 5034 */ 5035 if (ipv6_addr_type(&rt->fib6_dst.addr) & IPV6_ADDR_LINKLOCAL) 5036 return true; 5037 5038 /* Multicast routes aren't supported, so ignore them. Neighbour 5039 * Discovery packets are specifically trapped. 5040 */ 5041 if (ipv6_addr_type(&rt->fib6_dst.addr) & IPV6_ADDR_MULTICAST) 5042 return true; 5043 5044 /* Cloned routes are irrelevant in the forwarding path. */ 5045 if (rt->fib6_flags & RTF_CACHE) 5046 return true; 5047 5048 return false; 5049 } 5050 5051 static struct mlxsw_sp_rt6 *mlxsw_sp_rt6_create(struct fib6_info *rt) 5052 { 5053 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5054 5055 mlxsw_sp_rt6 = kzalloc(sizeof(*mlxsw_sp_rt6), GFP_KERNEL); 5056 if (!mlxsw_sp_rt6) 5057 return ERR_PTR(-ENOMEM); 5058 5059 /* In case of route replace, replaced route is deleted with 5060 * no notification. Take reference to prevent accessing freed 5061 * memory. 5062 */ 5063 mlxsw_sp_rt6->rt = rt; 5064 fib6_info_hold(rt); 5065 5066 return mlxsw_sp_rt6; 5067 } 5068 5069 #if IS_ENABLED(CONFIG_IPV6) 5070 static void mlxsw_sp_rt6_release(struct fib6_info *rt) 5071 { 5072 fib6_info_release(rt); 5073 } 5074 #else 5075 static void mlxsw_sp_rt6_release(struct fib6_info *rt) 5076 { 5077 } 5078 #endif 5079 5080 static void mlxsw_sp_rt6_destroy(struct mlxsw_sp_rt6 *mlxsw_sp_rt6) 5081 { 5082 mlxsw_sp_rt6_release(mlxsw_sp_rt6->rt); 5083 kfree(mlxsw_sp_rt6); 5084 } 5085 5086 static bool mlxsw_sp_fib6_rt_can_mp(const struct fib6_info *rt) 5087 { 5088 /* RTF_CACHE routes are ignored */ 5089 return !(rt->fib6_flags & RTF_ADDRCONF) && 5090 rt->fib6_nh->fib_nh_gw_family; 5091 } 5092 5093 static struct fib6_info * 5094 mlxsw_sp_fib6_entry_rt(const struct mlxsw_sp_fib6_entry *fib6_entry) 5095 { 5096 return list_first_entry(&fib6_entry->rt6_list, struct mlxsw_sp_rt6, 5097 list)->rt; 5098 } 5099 5100 static struct mlxsw_sp_fib6_entry * 5101 mlxsw_sp_fib6_node_mp_entry_find(const struct mlxsw_sp_fib_node *fib_node, 5102 const struct fib6_info *nrt, bool replace) 5103 { 5104 struct mlxsw_sp_fib6_entry *fib6_entry; 5105 5106 if (!mlxsw_sp_fib6_rt_can_mp(nrt) || replace) 5107 return NULL; 5108 5109 list_for_each_entry(fib6_entry, &fib_node->entry_list, common.list) { 5110 struct fib6_info *rt = mlxsw_sp_fib6_entry_rt(fib6_entry); 5111 5112 /* RT6_TABLE_LOCAL and RT6_TABLE_MAIN share the same 5113 * virtual router. 5114 */ 5115 if (rt->fib6_table->tb6_id > nrt->fib6_table->tb6_id) 5116 continue; 5117 if (rt->fib6_table->tb6_id != nrt->fib6_table->tb6_id) 5118 break; 5119 if (rt->fib6_metric < nrt->fib6_metric) 5120 continue; 5121 if (rt->fib6_metric == nrt->fib6_metric && 5122 mlxsw_sp_fib6_rt_can_mp(rt)) 5123 return fib6_entry; 5124 if (rt->fib6_metric > nrt->fib6_metric) 5125 break; 5126 } 5127 5128 return NULL; 5129 } 5130 5131 static struct mlxsw_sp_rt6 * 5132 mlxsw_sp_fib6_entry_rt_find(const struct mlxsw_sp_fib6_entry *fib6_entry, 5133 const struct fib6_info *rt) 5134 { 5135 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5136 5137 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 5138 if (mlxsw_sp_rt6->rt == rt) 5139 return mlxsw_sp_rt6; 5140 } 5141 5142 return NULL; 5143 } 5144 5145 static bool mlxsw_sp_nexthop6_ipip_type(const struct mlxsw_sp *mlxsw_sp, 5146 const struct fib6_info *rt, 5147 enum mlxsw_sp_ipip_type *ret) 5148 { 5149 return rt->fib6_nh->fib_nh_dev && 5150 mlxsw_sp_netdev_ipip_type(mlxsw_sp, rt->fib6_nh->fib_nh_dev, ret); 5151 } 5152 5153 static int mlxsw_sp_nexthop6_type_init(struct mlxsw_sp *mlxsw_sp, 5154 struct mlxsw_sp_nexthop_group *nh_grp, 5155 struct mlxsw_sp_nexthop *nh, 5156 const struct fib6_info *rt) 5157 { 5158 const struct mlxsw_sp_ipip_ops *ipip_ops; 5159 struct mlxsw_sp_ipip_entry *ipip_entry; 5160 struct net_device *dev = rt->fib6_nh->fib_nh_dev; 5161 struct mlxsw_sp_rif *rif; 5162 int err; 5163 5164 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev); 5165 if (ipip_entry) { 5166 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 5167 if (ipip_ops->can_offload(mlxsw_sp, dev, 5168 MLXSW_SP_L3_PROTO_IPV6)) { 5169 nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP; 5170 mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry); 5171 return 0; 5172 } 5173 } 5174 5175 nh->type = MLXSW_SP_NEXTHOP_TYPE_ETH; 5176 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 5177 if (!rif) 5178 return 0; 5179 mlxsw_sp_nexthop_rif_init(nh, rif); 5180 5181 err = mlxsw_sp_nexthop_neigh_init(mlxsw_sp, nh); 5182 if (err) 5183 goto err_nexthop_neigh_init; 5184 5185 return 0; 5186 5187 err_nexthop_neigh_init: 5188 mlxsw_sp_nexthop_rif_fini(nh); 5189 return err; 5190 } 5191 5192 static void mlxsw_sp_nexthop6_type_fini(struct mlxsw_sp *mlxsw_sp, 5193 struct mlxsw_sp_nexthop *nh) 5194 { 5195 mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); 5196 } 5197 5198 static int mlxsw_sp_nexthop6_init(struct mlxsw_sp *mlxsw_sp, 5199 struct mlxsw_sp_nexthop_group *nh_grp, 5200 struct mlxsw_sp_nexthop *nh, 5201 const struct fib6_info *rt) 5202 { 5203 struct net_device *dev = rt->fib6_nh->fib_nh_dev; 5204 5205 nh->nh_grp = nh_grp; 5206 nh->nh_weight = rt->fib6_nh->fib_nh_weight; 5207 memcpy(&nh->gw_addr, &rt->fib6_nh->fib_nh_gw6, sizeof(nh->gw_addr)); 5208 mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh); 5209 5210 list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list); 5211 5212 if (!dev) 5213 return 0; 5214 nh->ifindex = dev->ifindex; 5215 5216 return mlxsw_sp_nexthop6_type_init(mlxsw_sp, nh_grp, nh, rt); 5217 } 5218 5219 static void mlxsw_sp_nexthop6_fini(struct mlxsw_sp *mlxsw_sp, 5220 struct mlxsw_sp_nexthop *nh) 5221 { 5222 mlxsw_sp_nexthop6_type_fini(mlxsw_sp, nh); 5223 list_del(&nh->router_list_node); 5224 mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh); 5225 } 5226 5227 static bool mlxsw_sp_rt6_is_gateway(const struct mlxsw_sp *mlxsw_sp, 5228 const struct fib6_info *rt) 5229 { 5230 return rt->fib6_nh->fib_nh_gw_family || 5231 mlxsw_sp_nexthop6_ipip_type(mlxsw_sp, rt, NULL); 5232 } 5233 5234 static struct mlxsw_sp_nexthop_group * 5235 mlxsw_sp_nexthop6_group_create(struct mlxsw_sp *mlxsw_sp, 5236 struct mlxsw_sp_fib6_entry *fib6_entry) 5237 { 5238 struct mlxsw_sp_nexthop_group *nh_grp; 5239 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5240 struct mlxsw_sp_nexthop *nh; 5241 int i = 0; 5242 int err; 5243 5244 nh_grp = kzalloc(struct_size(nh_grp, nexthops, fib6_entry->nrt6), 5245 GFP_KERNEL); 5246 if (!nh_grp) 5247 return ERR_PTR(-ENOMEM); 5248 INIT_LIST_HEAD(&nh_grp->fib_list); 5249 #if IS_ENABLED(CONFIG_IPV6) 5250 nh_grp->neigh_tbl = &nd_tbl; 5251 #endif 5252 mlxsw_sp_rt6 = list_first_entry(&fib6_entry->rt6_list, 5253 struct mlxsw_sp_rt6, list); 5254 nh_grp->gateway = mlxsw_sp_rt6_is_gateway(mlxsw_sp, mlxsw_sp_rt6->rt); 5255 nh_grp->count = fib6_entry->nrt6; 5256 for (i = 0; i < nh_grp->count; i++) { 5257 struct fib6_info *rt = mlxsw_sp_rt6->rt; 5258 5259 nh = &nh_grp->nexthops[i]; 5260 err = mlxsw_sp_nexthop6_init(mlxsw_sp, nh_grp, nh, rt); 5261 if (err) 5262 goto err_nexthop6_init; 5263 mlxsw_sp_rt6 = list_next_entry(mlxsw_sp_rt6, list); 5264 } 5265 5266 err = mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp); 5267 if (err) 5268 goto err_nexthop_group_insert; 5269 5270 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 5271 return nh_grp; 5272 5273 err_nexthop_group_insert: 5274 err_nexthop6_init: 5275 for (i--; i >= 0; i--) { 5276 nh = &nh_grp->nexthops[i]; 5277 mlxsw_sp_nexthop6_fini(mlxsw_sp, nh); 5278 } 5279 kfree(nh_grp); 5280 return ERR_PTR(err); 5281 } 5282 5283 static void 5284 mlxsw_sp_nexthop6_group_destroy(struct mlxsw_sp *mlxsw_sp, 5285 struct mlxsw_sp_nexthop_group *nh_grp) 5286 { 5287 struct mlxsw_sp_nexthop *nh; 5288 int i = nh_grp->count; 5289 5290 mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp); 5291 for (i--; i >= 0; i--) { 5292 nh = &nh_grp->nexthops[i]; 5293 mlxsw_sp_nexthop6_fini(mlxsw_sp, nh); 5294 } 5295 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 5296 WARN_ON(nh_grp->adj_index_valid); 5297 kfree(nh_grp); 5298 } 5299 5300 static int mlxsw_sp_nexthop6_group_get(struct mlxsw_sp *mlxsw_sp, 5301 struct mlxsw_sp_fib6_entry *fib6_entry) 5302 { 5303 struct mlxsw_sp_nexthop_group *nh_grp; 5304 5305 nh_grp = mlxsw_sp_nexthop6_group_lookup(mlxsw_sp, fib6_entry); 5306 if (!nh_grp) { 5307 nh_grp = mlxsw_sp_nexthop6_group_create(mlxsw_sp, fib6_entry); 5308 if (IS_ERR(nh_grp)) 5309 return PTR_ERR(nh_grp); 5310 } 5311 5312 list_add_tail(&fib6_entry->common.nexthop_group_node, 5313 &nh_grp->fib_list); 5314 fib6_entry->common.nh_group = nh_grp; 5315 5316 return 0; 5317 } 5318 5319 static void mlxsw_sp_nexthop6_group_put(struct mlxsw_sp *mlxsw_sp, 5320 struct mlxsw_sp_fib_entry *fib_entry) 5321 { 5322 struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 5323 5324 list_del(&fib_entry->nexthop_group_node); 5325 if (!list_empty(&nh_grp->fib_list)) 5326 return; 5327 mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, nh_grp); 5328 } 5329 5330 static int 5331 mlxsw_sp_nexthop6_group_update(struct mlxsw_sp *mlxsw_sp, 5332 struct mlxsw_sp_fib6_entry *fib6_entry) 5333 { 5334 struct mlxsw_sp_nexthop_group *old_nh_grp = fib6_entry->common.nh_group; 5335 int err; 5336 5337 fib6_entry->common.nh_group = NULL; 5338 list_del(&fib6_entry->common.nexthop_group_node); 5339 5340 err = mlxsw_sp_nexthop6_group_get(mlxsw_sp, fib6_entry); 5341 if (err) 5342 goto err_nexthop6_group_get; 5343 5344 /* In case this entry is offloaded, then the adjacency index 5345 * currently associated with it in the device's table is that 5346 * of the old group. Start using the new one instead. 5347 */ 5348 err = mlxsw_sp_fib_node_entry_add(mlxsw_sp, &fib6_entry->common); 5349 if (err) 5350 goto err_fib_node_entry_add; 5351 5352 if (list_empty(&old_nh_grp->fib_list)) 5353 mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, old_nh_grp); 5354 5355 return 0; 5356 5357 err_fib_node_entry_add: 5358 mlxsw_sp_nexthop6_group_put(mlxsw_sp, &fib6_entry->common); 5359 err_nexthop6_group_get: 5360 list_add_tail(&fib6_entry->common.nexthop_group_node, 5361 &old_nh_grp->fib_list); 5362 fib6_entry->common.nh_group = old_nh_grp; 5363 return err; 5364 } 5365 5366 static int 5367 mlxsw_sp_fib6_entry_nexthop_add(struct mlxsw_sp *mlxsw_sp, 5368 struct mlxsw_sp_fib6_entry *fib6_entry, 5369 struct fib6_info **rt_arr, unsigned int nrt6) 5370 { 5371 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5372 int err, i; 5373 5374 for (i = 0; i < nrt6; i++) { 5375 mlxsw_sp_rt6 = mlxsw_sp_rt6_create(rt_arr[i]); 5376 if (IS_ERR(mlxsw_sp_rt6)) { 5377 err = PTR_ERR(mlxsw_sp_rt6); 5378 goto err_rt6_create; 5379 } 5380 5381 list_add_tail(&mlxsw_sp_rt6->list, &fib6_entry->rt6_list); 5382 fib6_entry->nrt6++; 5383 } 5384 5385 err = mlxsw_sp_nexthop6_group_update(mlxsw_sp, fib6_entry); 5386 if (err) 5387 goto err_nexthop6_group_update; 5388 5389 return 0; 5390 5391 err_nexthop6_group_update: 5392 i = nrt6; 5393 err_rt6_create: 5394 for (i--; i >= 0; i--) { 5395 fib6_entry->nrt6--; 5396 mlxsw_sp_rt6 = list_last_entry(&fib6_entry->rt6_list, 5397 struct mlxsw_sp_rt6, list); 5398 list_del(&mlxsw_sp_rt6->list); 5399 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 5400 } 5401 return err; 5402 } 5403 5404 static void 5405 mlxsw_sp_fib6_entry_nexthop_del(struct mlxsw_sp *mlxsw_sp, 5406 struct mlxsw_sp_fib6_entry *fib6_entry, 5407 struct fib6_info **rt_arr, unsigned int nrt6) 5408 { 5409 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5410 int i; 5411 5412 for (i = 0; i < nrt6; i++) { 5413 mlxsw_sp_rt6 = mlxsw_sp_fib6_entry_rt_find(fib6_entry, 5414 rt_arr[i]); 5415 if (WARN_ON_ONCE(!mlxsw_sp_rt6)) 5416 continue; 5417 5418 fib6_entry->nrt6--; 5419 list_del(&mlxsw_sp_rt6->list); 5420 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 5421 } 5422 5423 mlxsw_sp_nexthop6_group_update(mlxsw_sp, fib6_entry); 5424 } 5425 5426 static void mlxsw_sp_fib6_entry_type_set(struct mlxsw_sp *mlxsw_sp, 5427 struct mlxsw_sp_fib_entry *fib_entry, 5428 const struct fib6_info *rt) 5429 { 5430 /* Packets hitting RTF_REJECT routes need to be discarded by the 5431 * stack. We can rely on their destination device not having a 5432 * RIF (it's the loopback device) and can thus use action type 5433 * local, which will cause them to be trapped with a lower 5434 * priority than packets that need to be locally received. 5435 */ 5436 if (rt->fib6_flags & (RTF_LOCAL | RTF_ANYCAST)) 5437 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 5438 else if (rt->fib6_type == RTN_BLACKHOLE) 5439 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE; 5440 else if (rt->fib6_flags & RTF_REJECT) 5441 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE; 5442 else if (mlxsw_sp_rt6_is_gateway(mlxsw_sp, rt)) 5443 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_REMOTE; 5444 else 5445 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL; 5446 } 5447 5448 static void 5449 mlxsw_sp_fib6_entry_rt_destroy_all(struct mlxsw_sp_fib6_entry *fib6_entry) 5450 { 5451 struct mlxsw_sp_rt6 *mlxsw_sp_rt6, *tmp; 5452 5453 list_for_each_entry_safe(mlxsw_sp_rt6, tmp, &fib6_entry->rt6_list, 5454 list) { 5455 fib6_entry->nrt6--; 5456 list_del(&mlxsw_sp_rt6->list); 5457 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 5458 } 5459 } 5460 5461 static struct mlxsw_sp_fib6_entry * 5462 mlxsw_sp_fib6_entry_create(struct mlxsw_sp *mlxsw_sp, 5463 struct mlxsw_sp_fib_node *fib_node, 5464 struct fib6_info **rt_arr, unsigned int nrt6) 5465 { 5466 struct mlxsw_sp_fib6_entry *fib6_entry; 5467 struct mlxsw_sp_fib_entry *fib_entry; 5468 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5469 int err, i; 5470 5471 fib6_entry = kzalloc(sizeof(*fib6_entry), GFP_KERNEL); 5472 if (!fib6_entry) 5473 return ERR_PTR(-ENOMEM); 5474 fib_entry = &fib6_entry->common; 5475 5476 INIT_LIST_HEAD(&fib6_entry->rt6_list); 5477 5478 for (i = 0; i < nrt6; i++) { 5479 mlxsw_sp_rt6 = mlxsw_sp_rt6_create(rt_arr[i]); 5480 if (IS_ERR(mlxsw_sp_rt6)) { 5481 err = PTR_ERR(mlxsw_sp_rt6); 5482 goto err_rt6_create; 5483 } 5484 list_add_tail(&mlxsw_sp_rt6->list, &fib6_entry->rt6_list); 5485 fib6_entry->nrt6++; 5486 } 5487 5488 mlxsw_sp_fib6_entry_type_set(mlxsw_sp, fib_entry, rt_arr[0]); 5489 5490 err = mlxsw_sp_nexthop6_group_get(mlxsw_sp, fib6_entry); 5491 if (err) 5492 goto err_nexthop6_group_get; 5493 5494 fib_entry->fib_node = fib_node; 5495 5496 return fib6_entry; 5497 5498 err_nexthop6_group_get: 5499 i = nrt6; 5500 err_rt6_create: 5501 for (i--; i >= 0; i--) { 5502 fib6_entry->nrt6--; 5503 mlxsw_sp_rt6 = list_last_entry(&fib6_entry->rt6_list, 5504 struct mlxsw_sp_rt6, list); 5505 list_del(&mlxsw_sp_rt6->list); 5506 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 5507 } 5508 kfree(fib6_entry); 5509 return ERR_PTR(err); 5510 } 5511 5512 static void mlxsw_sp_fib6_entry_destroy(struct mlxsw_sp *mlxsw_sp, 5513 struct mlxsw_sp_fib6_entry *fib6_entry) 5514 { 5515 mlxsw_sp_nexthop6_group_put(mlxsw_sp, &fib6_entry->common); 5516 mlxsw_sp_fib6_entry_rt_destroy_all(fib6_entry); 5517 WARN_ON(fib6_entry->nrt6); 5518 kfree(fib6_entry); 5519 } 5520 5521 static struct mlxsw_sp_fib6_entry * 5522 mlxsw_sp_fib6_node_entry_find(const struct mlxsw_sp_fib_node *fib_node, 5523 const struct fib6_info *nrt, bool replace) 5524 { 5525 struct mlxsw_sp_fib6_entry *fib6_entry, *fallback = NULL; 5526 5527 list_for_each_entry(fib6_entry, &fib_node->entry_list, common.list) { 5528 struct fib6_info *rt = mlxsw_sp_fib6_entry_rt(fib6_entry); 5529 5530 if (rt->fib6_table->tb6_id > nrt->fib6_table->tb6_id) 5531 continue; 5532 if (rt->fib6_table->tb6_id != nrt->fib6_table->tb6_id) 5533 break; 5534 if (replace && rt->fib6_metric == nrt->fib6_metric) { 5535 if (mlxsw_sp_fib6_rt_can_mp(rt) == 5536 mlxsw_sp_fib6_rt_can_mp(nrt)) 5537 return fib6_entry; 5538 if (mlxsw_sp_fib6_rt_can_mp(nrt)) 5539 fallback = fallback ?: fib6_entry; 5540 } 5541 if (rt->fib6_metric > nrt->fib6_metric) 5542 return fallback ?: fib6_entry; 5543 } 5544 5545 return fallback; 5546 } 5547 5548 static int 5549 mlxsw_sp_fib6_node_list_insert(struct mlxsw_sp_fib6_entry *new6_entry, 5550 bool *p_replace) 5551 { 5552 struct mlxsw_sp_fib_node *fib_node = new6_entry->common.fib_node; 5553 struct fib6_info *nrt = mlxsw_sp_fib6_entry_rt(new6_entry); 5554 struct mlxsw_sp_fib6_entry *fib6_entry; 5555 5556 fib6_entry = mlxsw_sp_fib6_node_entry_find(fib_node, nrt, *p_replace); 5557 5558 if (*p_replace && !fib6_entry) 5559 *p_replace = false; 5560 5561 if (fib6_entry) { 5562 list_add_tail(&new6_entry->common.list, 5563 &fib6_entry->common.list); 5564 } else { 5565 struct mlxsw_sp_fib6_entry *last; 5566 5567 list_for_each_entry(last, &fib_node->entry_list, common.list) { 5568 struct fib6_info *rt = mlxsw_sp_fib6_entry_rt(last); 5569 5570 if (nrt->fib6_table->tb6_id > rt->fib6_table->tb6_id) 5571 break; 5572 fib6_entry = last; 5573 } 5574 5575 if (fib6_entry) 5576 list_add(&new6_entry->common.list, 5577 &fib6_entry->common.list); 5578 else 5579 list_add(&new6_entry->common.list, 5580 &fib_node->entry_list); 5581 } 5582 5583 return 0; 5584 } 5585 5586 static void 5587 mlxsw_sp_fib6_node_list_remove(struct mlxsw_sp_fib6_entry *fib6_entry) 5588 { 5589 list_del(&fib6_entry->common.list); 5590 } 5591 5592 static int mlxsw_sp_fib6_node_entry_link(struct mlxsw_sp *mlxsw_sp, 5593 struct mlxsw_sp_fib6_entry *fib6_entry, 5594 bool *p_replace) 5595 { 5596 int err; 5597 5598 err = mlxsw_sp_fib6_node_list_insert(fib6_entry, p_replace); 5599 if (err) 5600 return err; 5601 5602 err = mlxsw_sp_fib_node_entry_add(mlxsw_sp, &fib6_entry->common); 5603 if (err) 5604 goto err_fib_node_entry_add; 5605 5606 return 0; 5607 5608 err_fib_node_entry_add: 5609 mlxsw_sp_fib6_node_list_remove(fib6_entry); 5610 return err; 5611 } 5612 5613 static void 5614 mlxsw_sp_fib6_node_entry_unlink(struct mlxsw_sp *mlxsw_sp, 5615 struct mlxsw_sp_fib6_entry *fib6_entry) 5616 { 5617 mlxsw_sp_fib_node_entry_del(mlxsw_sp, &fib6_entry->common); 5618 mlxsw_sp_fib6_node_list_remove(fib6_entry); 5619 } 5620 5621 static struct mlxsw_sp_fib6_entry * 5622 mlxsw_sp_fib6_entry_lookup(struct mlxsw_sp *mlxsw_sp, 5623 const struct fib6_info *rt) 5624 { 5625 struct mlxsw_sp_fib6_entry *fib6_entry; 5626 struct mlxsw_sp_fib_node *fib_node; 5627 struct mlxsw_sp_fib *fib; 5628 struct mlxsw_sp_vr *vr; 5629 5630 vr = mlxsw_sp_vr_find(mlxsw_sp, rt->fib6_table->tb6_id); 5631 if (!vr) 5632 return NULL; 5633 fib = mlxsw_sp_vr_fib(vr, MLXSW_SP_L3_PROTO_IPV6); 5634 5635 fib_node = mlxsw_sp_fib_node_lookup(fib, &rt->fib6_dst.addr, 5636 sizeof(rt->fib6_dst.addr), 5637 rt->fib6_dst.plen); 5638 if (!fib_node) 5639 return NULL; 5640 5641 list_for_each_entry(fib6_entry, &fib_node->entry_list, common.list) { 5642 struct fib6_info *iter_rt = mlxsw_sp_fib6_entry_rt(fib6_entry); 5643 5644 if (rt->fib6_table->tb6_id == iter_rt->fib6_table->tb6_id && 5645 rt->fib6_metric == iter_rt->fib6_metric && 5646 mlxsw_sp_fib6_entry_rt_find(fib6_entry, rt)) 5647 return fib6_entry; 5648 } 5649 5650 return NULL; 5651 } 5652 5653 static void mlxsw_sp_fib6_entry_replace(struct mlxsw_sp *mlxsw_sp, 5654 struct mlxsw_sp_fib6_entry *fib6_entry, 5655 bool replace) 5656 { 5657 struct mlxsw_sp_fib_node *fib_node = fib6_entry->common.fib_node; 5658 struct mlxsw_sp_fib6_entry *replaced; 5659 5660 if (!replace) 5661 return; 5662 5663 replaced = list_next_entry(fib6_entry, common.list); 5664 5665 mlxsw_sp_fib6_node_entry_unlink(mlxsw_sp, replaced); 5666 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, replaced); 5667 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5668 } 5669 5670 static int mlxsw_sp_router_fib6_add(struct mlxsw_sp *mlxsw_sp, 5671 struct fib6_info **rt_arr, 5672 unsigned int nrt6, bool replace) 5673 { 5674 struct mlxsw_sp_fib6_entry *fib6_entry; 5675 struct mlxsw_sp_fib_node *fib_node; 5676 struct fib6_info *rt = rt_arr[0]; 5677 int err; 5678 5679 if (mlxsw_sp->router->aborted) 5680 return 0; 5681 5682 if (rt->fib6_src.plen) 5683 return -EINVAL; 5684 5685 if (mlxsw_sp_fib6_rt_should_ignore(rt)) 5686 return 0; 5687 5688 fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, rt->fib6_table->tb6_id, 5689 &rt->fib6_dst.addr, 5690 sizeof(rt->fib6_dst.addr), 5691 rt->fib6_dst.plen, 5692 MLXSW_SP_L3_PROTO_IPV6); 5693 if (IS_ERR(fib_node)) 5694 return PTR_ERR(fib_node); 5695 5696 /* Before creating a new entry, try to append route to an existing 5697 * multipath entry. 5698 */ 5699 fib6_entry = mlxsw_sp_fib6_node_mp_entry_find(fib_node, rt, replace); 5700 if (fib6_entry) { 5701 err = mlxsw_sp_fib6_entry_nexthop_add(mlxsw_sp, fib6_entry, 5702 rt_arr, nrt6); 5703 if (err) 5704 goto err_fib6_entry_nexthop_add; 5705 return 0; 5706 } 5707 5708 fib6_entry = mlxsw_sp_fib6_entry_create(mlxsw_sp, fib_node, rt_arr, 5709 nrt6); 5710 if (IS_ERR(fib6_entry)) { 5711 err = PTR_ERR(fib6_entry); 5712 goto err_fib6_entry_create; 5713 } 5714 5715 err = mlxsw_sp_fib6_node_entry_link(mlxsw_sp, fib6_entry, &replace); 5716 if (err) 5717 goto err_fib6_node_entry_link; 5718 5719 mlxsw_sp_fib6_entry_replace(mlxsw_sp, fib6_entry, replace); 5720 5721 return 0; 5722 5723 err_fib6_node_entry_link: 5724 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 5725 err_fib6_entry_create: 5726 err_fib6_entry_nexthop_add: 5727 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5728 return err; 5729 } 5730 5731 static void mlxsw_sp_router_fib6_del(struct mlxsw_sp *mlxsw_sp, 5732 struct fib6_info **rt_arr, 5733 unsigned int nrt6) 5734 { 5735 struct mlxsw_sp_fib6_entry *fib6_entry; 5736 struct mlxsw_sp_fib_node *fib_node; 5737 struct fib6_info *rt = rt_arr[0]; 5738 5739 if (mlxsw_sp->router->aborted) 5740 return; 5741 5742 if (mlxsw_sp_fib6_rt_should_ignore(rt)) 5743 return; 5744 5745 fib6_entry = mlxsw_sp_fib6_entry_lookup(mlxsw_sp, rt); 5746 if (WARN_ON(!fib6_entry)) 5747 return; 5748 5749 /* If not all the nexthops are deleted, then only reduce the nexthop 5750 * group. 5751 */ 5752 if (nrt6 != fib6_entry->nrt6) { 5753 mlxsw_sp_fib6_entry_nexthop_del(mlxsw_sp, fib6_entry, rt_arr, 5754 nrt6); 5755 return; 5756 } 5757 5758 fib_node = fib6_entry->common.fib_node; 5759 5760 mlxsw_sp_fib6_node_entry_unlink(mlxsw_sp, fib6_entry); 5761 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 5762 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5763 } 5764 5765 static int __mlxsw_sp_router_set_abort_trap(struct mlxsw_sp *mlxsw_sp, 5766 enum mlxsw_reg_ralxx_protocol proto, 5767 u8 tree_id) 5768 { 5769 char ralta_pl[MLXSW_REG_RALTA_LEN]; 5770 char ralst_pl[MLXSW_REG_RALST_LEN]; 5771 int i, err; 5772 5773 mlxsw_reg_ralta_pack(ralta_pl, true, proto, tree_id); 5774 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); 5775 if (err) 5776 return err; 5777 5778 mlxsw_reg_ralst_pack(ralst_pl, 0xff, tree_id); 5779 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl); 5780 if (err) 5781 return err; 5782 5783 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 5784 struct mlxsw_sp_vr *vr = &mlxsw_sp->router->vrs[i]; 5785 char raltb_pl[MLXSW_REG_RALTB_LEN]; 5786 char ralue_pl[MLXSW_REG_RALUE_LEN]; 5787 5788 mlxsw_reg_raltb_pack(raltb_pl, vr->id, proto, tree_id); 5789 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), 5790 raltb_pl); 5791 if (err) 5792 return err; 5793 5794 mlxsw_reg_ralue_pack(ralue_pl, proto, 5795 MLXSW_REG_RALUE_OP_WRITE_WRITE, vr->id, 0); 5796 mlxsw_reg_ralue_act_ip2me_pack(ralue_pl); 5797 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), 5798 ralue_pl); 5799 if (err) 5800 return err; 5801 } 5802 5803 return 0; 5804 } 5805 5806 static struct mlxsw_sp_mr_table * 5807 mlxsw_sp_router_fibmr_family_to_table(struct mlxsw_sp_vr *vr, int family) 5808 { 5809 if (family == RTNL_FAMILY_IPMR) 5810 return vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]; 5811 else 5812 return vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]; 5813 } 5814 5815 static int mlxsw_sp_router_fibmr_add(struct mlxsw_sp *mlxsw_sp, 5816 struct mfc_entry_notifier_info *men_info, 5817 bool replace) 5818 { 5819 struct mlxsw_sp_mr_table *mrt; 5820 struct mlxsw_sp_vr *vr; 5821 5822 if (mlxsw_sp->router->aborted) 5823 return 0; 5824 5825 vr = mlxsw_sp_vr_get(mlxsw_sp, men_info->tb_id, NULL); 5826 if (IS_ERR(vr)) 5827 return PTR_ERR(vr); 5828 5829 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, men_info->info.family); 5830 return mlxsw_sp_mr_route_add(mrt, men_info->mfc, replace); 5831 } 5832 5833 static void mlxsw_sp_router_fibmr_del(struct mlxsw_sp *mlxsw_sp, 5834 struct mfc_entry_notifier_info *men_info) 5835 { 5836 struct mlxsw_sp_mr_table *mrt; 5837 struct mlxsw_sp_vr *vr; 5838 5839 if (mlxsw_sp->router->aborted) 5840 return; 5841 5842 vr = mlxsw_sp_vr_find(mlxsw_sp, men_info->tb_id); 5843 if (WARN_ON(!vr)) 5844 return; 5845 5846 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, men_info->info.family); 5847 mlxsw_sp_mr_route_del(mrt, men_info->mfc); 5848 mlxsw_sp_vr_put(mlxsw_sp, vr); 5849 } 5850 5851 static int 5852 mlxsw_sp_router_fibmr_vif_add(struct mlxsw_sp *mlxsw_sp, 5853 struct vif_entry_notifier_info *ven_info) 5854 { 5855 struct mlxsw_sp_mr_table *mrt; 5856 struct mlxsw_sp_rif *rif; 5857 struct mlxsw_sp_vr *vr; 5858 5859 if (mlxsw_sp->router->aborted) 5860 return 0; 5861 5862 vr = mlxsw_sp_vr_get(mlxsw_sp, ven_info->tb_id, NULL); 5863 if (IS_ERR(vr)) 5864 return PTR_ERR(vr); 5865 5866 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, ven_info->info.family); 5867 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, ven_info->dev); 5868 return mlxsw_sp_mr_vif_add(mrt, ven_info->dev, 5869 ven_info->vif_index, 5870 ven_info->vif_flags, rif); 5871 } 5872 5873 static void 5874 mlxsw_sp_router_fibmr_vif_del(struct mlxsw_sp *mlxsw_sp, 5875 struct vif_entry_notifier_info *ven_info) 5876 { 5877 struct mlxsw_sp_mr_table *mrt; 5878 struct mlxsw_sp_vr *vr; 5879 5880 if (mlxsw_sp->router->aborted) 5881 return; 5882 5883 vr = mlxsw_sp_vr_find(mlxsw_sp, ven_info->tb_id); 5884 if (WARN_ON(!vr)) 5885 return; 5886 5887 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, ven_info->info.family); 5888 mlxsw_sp_mr_vif_del(mrt, ven_info->vif_index); 5889 mlxsw_sp_vr_put(mlxsw_sp, vr); 5890 } 5891 5892 static int mlxsw_sp_router_set_abort_trap(struct mlxsw_sp *mlxsw_sp) 5893 { 5894 enum mlxsw_reg_ralxx_protocol proto = MLXSW_REG_RALXX_PROTOCOL_IPV4; 5895 int err; 5896 5897 err = __mlxsw_sp_router_set_abort_trap(mlxsw_sp, proto, 5898 MLXSW_SP_LPM_TREE_MIN); 5899 if (err) 5900 return err; 5901 5902 /* The multicast router code does not need an abort trap as by default, 5903 * packets that don't match any routes are trapped to the CPU. 5904 */ 5905 5906 proto = MLXSW_REG_RALXX_PROTOCOL_IPV6; 5907 return __mlxsw_sp_router_set_abort_trap(mlxsw_sp, proto, 5908 MLXSW_SP_LPM_TREE_MIN + 1); 5909 } 5910 5911 static void mlxsw_sp_fib4_node_flush(struct mlxsw_sp *mlxsw_sp, 5912 struct mlxsw_sp_fib_node *fib_node) 5913 { 5914 struct mlxsw_sp_fib4_entry *fib4_entry, *tmp; 5915 5916 list_for_each_entry_safe(fib4_entry, tmp, &fib_node->entry_list, 5917 common.list) { 5918 bool do_break = &tmp->common.list == &fib_node->entry_list; 5919 5920 mlxsw_sp_fib4_node_entry_unlink(mlxsw_sp, fib4_entry); 5921 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); 5922 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5923 /* Break when entry list is empty and node was freed. 5924 * Otherwise, we'll access freed memory in the next 5925 * iteration. 5926 */ 5927 if (do_break) 5928 break; 5929 } 5930 } 5931 5932 static void mlxsw_sp_fib6_node_flush(struct mlxsw_sp *mlxsw_sp, 5933 struct mlxsw_sp_fib_node *fib_node) 5934 { 5935 struct mlxsw_sp_fib6_entry *fib6_entry, *tmp; 5936 5937 list_for_each_entry_safe(fib6_entry, tmp, &fib_node->entry_list, 5938 common.list) { 5939 bool do_break = &tmp->common.list == &fib_node->entry_list; 5940 5941 mlxsw_sp_fib6_node_entry_unlink(mlxsw_sp, fib6_entry); 5942 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 5943 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5944 if (do_break) 5945 break; 5946 } 5947 } 5948 5949 static void mlxsw_sp_fib_node_flush(struct mlxsw_sp *mlxsw_sp, 5950 struct mlxsw_sp_fib_node *fib_node) 5951 { 5952 switch (fib_node->fib->proto) { 5953 case MLXSW_SP_L3_PROTO_IPV4: 5954 mlxsw_sp_fib4_node_flush(mlxsw_sp, fib_node); 5955 break; 5956 case MLXSW_SP_L3_PROTO_IPV6: 5957 mlxsw_sp_fib6_node_flush(mlxsw_sp, fib_node); 5958 break; 5959 } 5960 } 5961 5962 static void mlxsw_sp_vr_fib_flush(struct mlxsw_sp *mlxsw_sp, 5963 struct mlxsw_sp_vr *vr, 5964 enum mlxsw_sp_l3proto proto) 5965 { 5966 struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto); 5967 struct mlxsw_sp_fib_node *fib_node, *tmp; 5968 5969 list_for_each_entry_safe(fib_node, tmp, &fib->node_list, list) { 5970 bool do_break = &tmp->list == &fib->node_list; 5971 5972 mlxsw_sp_fib_node_flush(mlxsw_sp, fib_node); 5973 if (do_break) 5974 break; 5975 } 5976 } 5977 5978 static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp) 5979 { 5980 int i, j; 5981 5982 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 5983 struct mlxsw_sp_vr *vr = &mlxsw_sp->router->vrs[i]; 5984 5985 if (!mlxsw_sp_vr_is_used(vr)) 5986 continue; 5987 5988 for (j = 0; j < MLXSW_SP_L3_PROTO_MAX; j++) 5989 mlxsw_sp_mr_table_flush(vr->mr_table[j]); 5990 mlxsw_sp_vr_fib_flush(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV4); 5991 5992 /* If virtual router was only used for IPv4, then it's no 5993 * longer used. 5994 */ 5995 if (!mlxsw_sp_vr_is_used(vr)) 5996 continue; 5997 mlxsw_sp_vr_fib_flush(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV6); 5998 } 5999 6000 /* After flushing all the routes, it is not possible anyone is still 6001 * using the adjacency index that is discarding packets, so free it in 6002 * case it was allocated. 6003 */ 6004 if (!mlxsw_sp->router->adj_discard_index_valid) 6005 return; 6006 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1, 6007 mlxsw_sp->router->adj_discard_index); 6008 mlxsw_sp->router->adj_discard_index_valid = false; 6009 } 6010 6011 static void mlxsw_sp_router_fib_abort(struct mlxsw_sp *mlxsw_sp) 6012 { 6013 int err; 6014 6015 if (mlxsw_sp->router->aborted) 6016 return; 6017 dev_warn(mlxsw_sp->bus_info->dev, "FIB abort triggered. Note that FIB entries are no longer being offloaded to this device.\n"); 6018 mlxsw_sp_router_fib_flush(mlxsw_sp); 6019 mlxsw_sp->router->aborted = true; 6020 err = mlxsw_sp_router_set_abort_trap(mlxsw_sp); 6021 if (err) 6022 dev_warn(mlxsw_sp->bus_info->dev, "Failed to set abort trap.\n"); 6023 } 6024 6025 struct mlxsw_sp_fib6_event_work { 6026 struct fib6_info **rt_arr; 6027 unsigned int nrt6; 6028 }; 6029 6030 struct mlxsw_sp_fib_event_work { 6031 struct work_struct work; 6032 union { 6033 struct mlxsw_sp_fib6_event_work fib6_work; 6034 struct fib_entry_notifier_info fen_info; 6035 struct fib_rule_notifier_info fr_info; 6036 struct fib_nh_notifier_info fnh_info; 6037 struct mfc_entry_notifier_info men_info; 6038 struct vif_entry_notifier_info ven_info; 6039 }; 6040 struct mlxsw_sp *mlxsw_sp; 6041 unsigned long event; 6042 }; 6043 6044 static int 6045 mlxsw_sp_router_fib6_work_init(struct mlxsw_sp_fib6_event_work *fib6_work, 6046 struct fib6_entry_notifier_info *fen6_info) 6047 { 6048 struct fib6_info *rt = fen6_info->rt; 6049 struct fib6_info **rt_arr; 6050 struct fib6_info *iter; 6051 unsigned int nrt6; 6052 int i = 0; 6053 6054 nrt6 = fen6_info->nsiblings + 1; 6055 6056 rt_arr = kcalloc(nrt6, sizeof(struct fib6_info *), GFP_ATOMIC); 6057 if (!rt_arr) 6058 return -ENOMEM; 6059 6060 fib6_work->rt_arr = rt_arr; 6061 fib6_work->nrt6 = nrt6; 6062 6063 rt_arr[0] = rt; 6064 fib6_info_hold(rt); 6065 6066 if (!fen6_info->nsiblings) 6067 return 0; 6068 6069 list_for_each_entry(iter, &rt->fib6_siblings, fib6_siblings) { 6070 if (i == fen6_info->nsiblings) 6071 break; 6072 6073 rt_arr[i + 1] = iter; 6074 fib6_info_hold(iter); 6075 i++; 6076 } 6077 WARN_ON_ONCE(i != fen6_info->nsiblings); 6078 6079 return 0; 6080 } 6081 6082 static void 6083 mlxsw_sp_router_fib6_work_fini(struct mlxsw_sp_fib6_event_work *fib6_work) 6084 { 6085 int i; 6086 6087 for (i = 0; i < fib6_work->nrt6; i++) 6088 mlxsw_sp_rt6_release(fib6_work->rt_arr[i]); 6089 kfree(fib6_work->rt_arr); 6090 } 6091 6092 static void mlxsw_sp_router_fib4_event_work(struct work_struct *work) 6093 { 6094 struct mlxsw_sp_fib_event_work *fib_work = 6095 container_of(work, struct mlxsw_sp_fib_event_work, work); 6096 struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; 6097 bool replace, append; 6098 int err; 6099 6100 /* Protect internal structures from changes */ 6101 rtnl_lock(); 6102 mlxsw_sp_span_respin(mlxsw_sp); 6103 6104 switch (fib_work->event) { 6105 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 6106 case FIB_EVENT_ENTRY_APPEND: /* fall through */ 6107 case FIB_EVENT_ENTRY_ADD: 6108 replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE; 6109 append = fib_work->event == FIB_EVENT_ENTRY_APPEND; 6110 err = mlxsw_sp_router_fib4_add(mlxsw_sp, &fib_work->fen_info, 6111 replace, append); 6112 if (err) 6113 mlxsw_sp_router_fib_abort(mlxsw_sp); 6114 fib_info_put(fib_work->fen_info.fi); 6115 break; 6116 case FIB_EVENT_ENTRY_DEL: 6117 mlxsw_sp_router_fib4_del(mlxsw_sp, &fib_work->fen_info); 6118 fib_info_put(fib_work->fen_info.fi); 6119 break; 6120 case FIB_EVENT_NH_ADD: /* fall through */ 6121 case FIB_EVENT_NH_DEL: 6122 mlxsw_sp_nexthop4_event(mlxsw_sp, fib_work->event, 6123 fib_work->fnh_info.fib_nh); 6124 fib_info_put(fib_work->fnh_info.fib_nh->nh_parent); 6125 break; 6126 } 6127 rtnl_unlock(); 6128 kfree(fib_work); 6129 } 6130 6131 static void mlxsw_sp_router_fib6_event_work(struct work_struct *work) 6132 { 6133 struct mlxsw_sp_fib_event_work *fib_work = 6134 container_of(work, struct mlxsw_sp_fib_event_work, work); 6135 struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; 6136 bool replace; 6137 int err; 6138 6139 rtnl_lock(); 6140 mlxsw_sp_span_respin(mlxsw_sp); 6141 6142 switch (fib_work->event) { 6143 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 6144 case FIB_EVENT_ENTRY_ADD: 6145 replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE; 6146 err = mlxsw_sp_router_fib6_add(mlxsw_sp, 6147 fib_work->fib6_work.rt_arr, 6148 fib_work->fib6_work.nrt6, 6149 replace); 6150 if (err) 6151 mlxsw_sp_router_fib_abort(mlxsw_sp); 6152 mlxsw_sp_router_fib6_work_fini(&fib_work->fib6_work); 6153 break; 6154 case FIB_EVENT_ENTRY_DEL: 6155 mlxsw_sp_router_fib6_del(mlxsw_sp, 6156 fib_work->fib6_work.rt_arr, 6157 fib_work->fib6_work.nrt6); 6158 mlxsw_sp_router_fib6_work_fini(&fib_work->fib6_work); 6159 break; 6160 } 6161 rtnl_unlock(); 6162 kfree(fib_work); 6163 } 6164 6165 static void mlxsw_sp_router_fibmr_event_work(struct work_struct *work) 6166 { 6167 struct mlxsw_sp_fib_event_work *fib_work = 6168 container_of(work, struct mlxsw_sp_fib_event_work, work); 6169 struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; 6170 bool replace; 6171 int err; 6172 6173 rtnl_lock(); 6174 switch (fib_work->event) { 6175 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 6176 case FIB_EVENT_ENTRY_ADD: 6177 replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE; 6178 6179 err = mlxsw_sp_router_fibmr_add(mlxsw_sp, &fib_work->men_info, 6180 replace); 6181 if (err) 6182 mlxsw_sp_router_fib_abort(mlxsw_sp); 6183 mr_cache_put(fib_work->men_info.mfc); 6184 break; 6185 case FIB_EVENT_ENTRY_DEL: 6186 mlxsw_sp_router_fibmr_del(mlxsw_sp, &fib_work->men_info); 6187 mr_cache_put(fib_work->men_info.mfc); 6188 break; 6189 case FIB_EVENT_VIF_ADD: 6190 err = mlxsw_sp_router_fibmr_vif_add(mlxsw_sp, 6191 &fib_work->ven_info); 6192 if (err) 6193 mlxsw_sp_router_fib_abort(mlxsw_sp); 6194 dev_put(fib_work->ven_info.dev); 6195 break; 6196 case FIB_EVENT_VIF_DEL: 6197 mlxsw_sp_router_fibmr_vif_del(mlxsw_sp, 6198 &fib_work->ven_info); 6199 dev_put(fib_work->ven_info.dev); 6200 break; 6201 } 6202 rtnl_unlock(); 6203 kfree(fib_work); 6204 } 6205 6206 static void mlxsw_sp_router_fib4_event(struct mlxsw_sp_fib_event_work *fib_work, 6207 struct fib_notifier_info *info) 6208 { 6209 struct fib_entry_notifier_info *fen_info; 6210 struct fib_nh_notifier_info *fnh_info; 6211 6212 switch (fib_work->event) { 6213 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 6214 case FIB_EVENT_ENTRY_APPEND: /* fall through */ 6215 case FIB_EVENT_ENTRY_ADD: /* fall through */ 6216 case FIB_EVENT_ENTRY_DEL: 6217 fen_info = container_of(info, struct fib_entry_notifier_info, 6218 info); 6219 fib_work->fen_info = *fen_info; 6220 /* Take reference on fib_info to prevent it from being 6221 * freed while work is queued. Release it afterwards. 6222 */ 6223 fib_info_hold(fib_work->fen_info.fi); 6224 break; 6225 case FIB_EVENT_NH_ADD: /* fall through */ 6226 case FIB_EVENT_NH_DEL: 6227 fnh_info = container_of(info, struct fib_nh_notifier_info, 6228 info); 6229 fib_work->fnh_info = *fnh_info; 6230 fib_info_hold(fib_work->fnh_info.fib_nh->nh_parent); 6231 break; 6232 } 6233 } 6234 6235 static int mlxsw_sp_router_fib6_event(struct mlxsw_sp_fib_event_work *fib_work, 6236 struct fib_notifier_info *info) 6237 { 6238 struct fib6_entry_notifier_info *fen6_info; 6239 int err; 6240 6241 switch (fib_work->event) { 6242 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 6243 case FIB_EVENT_ENTRY_ADD: /* fall through */ 6244 case FIB_EVENT_ENTRY_DEL: 6245 fen6_info = container_of(info, struct fib6_entry_notifier_info, 6246 info); 6247 err = mlxsw_sp_router_fib6_work_init(&fib_work->fib6_work, 6248 fen6_info); 6249 if (err) 6250 return err; 6251 break; 6252 } 6253 6254 return 0; 6255 } 6256 6257 static void 6258 mlxsw_sp_router_fibmr_event(struct mlxsw_sp_fib_event_work *fib_work, 6259 struct fib_notifier_info *info) 6260 { 6261 switch (fib_work->event) { 6262 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 6263 case FIB_EVENT_ENTRY_ADD: /* fall through */ 6264 case FIB_EVENT_ENTRY_DEL: 6265 memcpy(&fib_work->men_info, info, sizeof(fib_work->men_info)); 6266 mr_cache_hold(fib_work->men_info.mfc); 6267 break; 6268 case FIB_EVENT_VIF_ADD: /* fall through */ 6269 case FIB_EVENT_VIF_DEL: 6270 memcpy(&fib_work->ven_info, info, sizeof(fib_work->ven_info)); 6271 dev_hold(fib_work->ven_info.dev); 6272 break; 6273 } 6274 } 6275 6276 static int mlxsw_sp_router_fib_rule_event(unsigned long event, 6277 struct fib_notifier_info *info, 6278 struct mlxsw_sp *mlxsw_sp) 6279 { 6280 struct netlink_ext_ack *extack = info->extack; 6281 struct fib_rule_notifier_info *fr_info; 6282 struct fib_rule *rule; 6283 int err = 0; 6284 6285 /* nothing to do at the moment */ 6286 if (event == FIB_EVENT_RULE_DEL) 6287 return 0; 6288 6289 if (mlxsw_sp->router->aborted) 6290 return 0; 6291 6292 fr_info = container_of(info, struct fib_rule_notifier_info, info); 6293 rule = fr_info->rule; 6294 6295 /* Rule only affects locally generated traffic */ 6296 if (rule->iifindex == mlxsw_sp_net(mlxsw_sp)->loopback_dev->ifindex) 6297 return 0; 6298 6299 switch (info->family) { 6300 case AF_INET: 6301 if (!fib4_rule_default(rule) && !rule->l3mdev) 6302 err = -EOPNOTSUPP; 6303 break; 6304 case AF_INET6: 6305 if (!fib6_rule_default(rule) && !rule->l3mdev) 6306 err = -EOPNOTSUPP; 6307 break; 6308 case RTNL_FAMILY_IPMR: 6309 if (!ipmr_rule_default(rule) && !rule->l3mdev) 6310 err = -EOPNOTSUPP; 6311 break; 6312 case RTNL_FAMILY_IP6MR: 6313 if (!ip6mr_rule_default(rule) && !rule->l3mdev) 6314 err = -EOPNOTSUPP; 6315 break; 6316 } 6317 6318 if (err < 0) 6319 NL_SET_ERR_MSG_MOD(extack, "FIB rules not supported"); 6320 6321 return err; 6322 } 6323 6324 /* Called with rcu_read_lock() */ 6325 static int mlxsw_sp_router_fib_event(struct notifier_block *nb, 6326 unsigned long event, void *ptr) 6327 { 6328 struct mlxsw_sp_fib_event_work *fib_work; 6329 struct fib_notifier_info *info = ptr; 6330 struct mlxsw_sp_router *router; 6331 int err; 6332 6333 if ((info->family != AF_INET && info->family != AF_INET6 && 6334 info->family != RTNL_FAMILY_IPMR && 6335 info->family != RTNL_FAMILY_IP6MR)) 6336 return NOTIFY_DONE; 6337 6338 router = container_of(nb, struct mlxsw_sp_router, fib_nb); 6339 6340 switch (event) { 6341 case FIB_EVENT_RULE_ADD: /* fall through */ 6342 case FIB_EVENT_RULE_DEL: 6343 err = mlxsw_sp_router_fib_rule_event(event, info, 6344 router->mlxsw_sp); 6345 return notifier_from_errno(err); 6346 case FIB_EVENT_ENTRY_ADD: 6347 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 6348 case FIB_EVENT_ENTRY_APPEND: /* fall through */ 6349 if (router->aborted) { 6350 NL_SET_ERR_MSG_MOD(info->extack, "FIB offload was aborted. Not configuring route"); 6351 return notifier_from_errno(-EINVAL); 6352 } 6353 if (info->family == AF_INET) { 6354 struct fib_entry_notifier_info *fen_info = ptr; 6355 6356 if (fen_info->fi->fib_nh_is_v6) { 6357 NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported"); 6358 return notifier_from_errno(-EINVAL); 6359 } 6360 if (fen_info->fi->nh) { 6361 NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported"); 6362 return notifier_from_errno(-EINVAL); 6363 } 6364 } else if (info->family == AF_INET6) { 6365 struct fib6_entry_notifier_info *fen6_info; 6366 6367 fen6_info = container_of(info, 6368 struct fib6_entry_notifier_info, 6369 info); 6370 if (fen6_info->rt->nh) { 6371 NL_SET_ERR_MSG_MOD(info->extack, "IPv6 route with nexthop objects is not supported"); 6372 return notifier_from_errno(-EINVAL); 6373 } 6374 } 6375 break; 6376 } 6377 6378 fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC); 6379 if (WARN_ON(!fib_work)) 6380 return NOTIFY_BAD; 6381 6382 fib_work->mlxsw_sp = router->mlxsw_sp; 6383 fib_work->event = event; 6384 6385 switch (info->family) { 6386 case AF_INET: 6387 INIT_WORK(&fib_work->work, mlxsw_sp_router_fib4_event_work); 6388 mlxsw_sp_router_fib4_event(fib_work, info); 6389 break; 6390 case AF_INET6: 6391 INIT_WORK(&fib_work->work, mlxsw_sp_router_fib6_event_work); 6392 err = mlxsw_sp_router_fib6_event(fib_work, info); 6393 if (err) 6394 goto err_fib_event; 6395 break; 6396 case RTNL_FAMILY_IP6MR: 6397 case RTNL_FAMILY_IPMR: 6398 INIT_WORK(&fib_work->work, mlxsw_sp_router_fibmr_event_work); 6399 mlxsw_sp_router_fibmr_event(fib_work, info); 6400 break; 6401 } 6402 6403 mlxsw_core_schedule_work(&fib_work->work); 6404 6405 return NOTIFY_DONE; 6406 6407 err_fib_event: 6408 kfree(fib_work); 6409 return NOTIFY_BAD; 6410 } 6411 6412 struct mlxsw_sp_rif * 6413 mlxsw_sp_rif_find_by_dev(const struct mlxsw_sp *mlxsw_sp, 6414 const struct net_device *dev) 6415 { 6416 int i; 6417 6418 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) 6419 if (mlxsw_sp->router->rifs[i] && 6420 mlxsw_sp->router->rifs[i]->dev == dev) 6421 return mlxsw_sp->router->rifs[i]; 6422 6423 return NULL; 6424 } 6425 6426 static int mlxsw_sp_router_rif_disable(struct mlxsw_sp *mlxsw_sp, u16 rif) 6427 { 6428 char ritr_pl[MLXSW_REG_RITR_LEN]; 6429 int err; 6430 6431 mlxsw_reg_ritr_rif_pack(ritr_pl, rif); 6432 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6433 if (err) 6434 return err; 6435 6436 mlxsw_reg_ritr_enable_set(ritr_pl, false); 6437 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6438 } 6439 6440 static void mlxsw_sp_router_rif_gone_sync(struct mlxsw_sp *mlxsw_sp, 6441 struct mlxsw_sp_rif *rif) 6442 { 6443 mlxsw_sp_router_rif_disable(mlxsw_sp, rif->rif_index); 6444 mlxsw_sp_nexthop_rif_gone_sync(mlxsw_sp, rif); 6445 mlxsw_sp_neigh_rif_gone_sync(mlxsw_sp, rif); 6446 } 6447 6448 static bool 6449 mlxsw_sp_rif_should_config(struct mlxsw_sp_rif *rif, struct net_device *dev, 6450 unsigned long event) 6451 { 6452 struct inet6_dev *inet6_dev; 6453 bool addr_list_empty = true; 6454 struct in_device *idev; 6455 6456 switch (event) { 6457 case NETDEV_UP: 6458 return rif == NULL; 6459 case NETDEV_DOWN: 6460 idev = __in_dev_get_rtnl(dev); 6461 if (idev && idev->ifa_list) 6462 addr_list_empty = false; 6463 6464 inet6_dev = __in6_dev_get(dev); 6465 if (addr_list_empty && inet6_dev && 6466 !list_empty(&inet6_dev->addr_list)) 6467 addr_list_empty = false; 6468 6469 /* macvlans do not have a RIF, but rather piggy back on the 6470 * RIF of their lower device. 6471 */ 6472 if (netif_is_macvlan(dev) && addr_list_empty) 6473 return true; 6474 6475 if (rif && addr_list_empty && 6476 !netif_is_l3_slave(rif->dev)) 6477 return true; 6478 /* It is possible we already removed the RIF ourselves 6479 * if it was assigned to a netdev that is now a bridge 6480 * or LAG slave. 6481 */ 6482 return false; 6483 } 6484 6485 return false; 6486 } 6487 6488 static enum mlxsw_sp_rif_type 6489 mlxsw_sp_dev_rif_type(const struct mlxsw_sp *mlxsw_sp, 6490 const struct net_device *dev) 6491 { 6492 enum mlxsw_sp_fid_type type; 6493 6494 if (mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL)) 6495 return MLXSW_SP_RIF_TYPE_IPIP_LB; 6496 6497 /* Otherwise RIF type is derived from the type of the underlying FID. */ 6498 if (is_vlan_dev(dev) && netif_is_bridge_master(vlan_dev_real_dev(dev))) 6499 type = MLXSW_SP_FID_TYPE_8021Q; 6500 else if (netif_is_bridge_master(dev) && br_vlan_enabled(dev)) 6501 type = MLXSW_SP_FID_TYPE_8021Q; 6502 else if (netif_is_bridge_master(dev)) 6503 type = MLXSW_SP_FID_TYPE_8021D; 6504 else 6505 type = MLXSW_SP_FID_TYPE_RFID; 6506 6507 return mlxsw_sp_fid_type_rif_type(mlxsw_sp, type); 6508 } 6509 6510 static int mlxsw_sp_rif_index_alloc(struct mlxsw_sp *mlxsw_sp, u16 *p_rif_index) 6511 { 6512 int i; 6513 6514 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) { 6515 if (!mlxsw_sp->router->rifs[i]) { 6516 *p_rif_index = i; 6517 return 0; 6518 } 6519 } 6520 6521 return -ENOBUFS; 6522 } 6523 6524 static struct mlxsw_sp_rif *mlxsw_sp_rif_alloc(size_t rif_size, u16 rif_index, 6525 u16 vr_id, 6526 struct net_device *l3_dev) 6527 { 6528 struct mlxsw_sp_rif *rif; 6529 6530 rif = kzalloc(rif_size, GFP_KERNEL); 6531 if (!rif) 6532 return NULL; 6533 6534 INIT_LIST_HEAD(&rif->nexthop_list); 6535 INIT_LIST_HEAD(&rif->neigh_list); 6536 if (l3_dev) { 6537 ether_addr_copy(rif->addr, l3_dev->dev_addr); 6538 rif->mtu = l3_dev->mtu; 6539 rif->dev = l3_dev; 6540 } 6541 rif->vr_id = vr_id; 6542 rif->rif_index = rif_index; 6543 6544 return rif; 6545 } 6546 6547 struct mlxsw_sp_rif *mlxsw_sp_rif_by_index(const struct mlxsw_sp *mlxsw_sp, 6548 u16 rif_index) 6549 { 6550 return mlxsw_sp->router->rifs[rif_index]; 6551 } 6552 6553 u16 mlxsw_sp_rif_index(const struct mlxsw_sp_rif *rif) 6554 { 6555 return rif->rif_index; 6556 } 6557 6558 u16 mlxsw_sp_ipip_lb_rif_index(const struct mlxsw_sp_rif_ipip_lb *lb_rif) 6559 { 6560 return lb_rif->common.rif_index; 6561 } 6562 6563 u16 mlxsw_sp_ipip_lb_ul_vr_id(const struct mlxsw_sp_rif_ipip_lb *lb_rif) 6564 { 6565 u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(lb_rif->common.dev); 6566 struct mlxsw_sp_vr *ul_vr; 6567 6568 ul_vr = mlxsw_sp_vr_get(lb_rif->common.mlxsw_sp, ul_tb_id, NULL); 6569 if (WARN_ON(IS_ERR(ul_vr))) 6570 return 0; 6571 6572 return ul_vr->id; 6573 } 6574 6575 u16 mlxsw_sp_ipip_lb_ul_rif_id(const struct mlxsw_sp_rif_ipip_lb *lb_rif) 6576 { 6577 return lb_rif->ul_rif_id; 6578 } 6579 6580 int mlxsw_sp_rif_dev_ifindex(const struct mlxsw_sp_rif *rif) 6581 { 6582 return rif->dev->ifindex; 6583 } 6584 6585 const struct net_device *mlxsw_sp_rif_dev(const struct mlxsw_sp_rif *rif) 6586 { 6587 return rif->dev; 6588 } 6589 6590 struct mlxsw_sp_fid *mlxsw_sp_rif_fid(const struct mlxsw_sp_rif *rif) 6591 { 6592 return rif->fid; 6593 } 6594 6595 static struct mlxsw_sp_rif * 6596 mlxsw_sp_rif_create(struct mlxsw_sp *mlxsw_sp, 6597 const struct mlxsw_sp_rif_params *params, 6598 struct netlink_ext_ack *extack) 6599 { 6600 u32 tb_id = l3mdev_fib_table(params->dev); 6601 const struct mlxsw_sp_rif_ops *ops; 6602 struct mlxsw_sp_fid *fid = NULL; 6603 enum mlxsw_sp_rif_type type; 6604 struct mlxsw_sp_rif *rif; 6605 struct mlxsw_sp_vr *vr; 6606 u16 rif_index; 6607 int i, err; 6608 6609 type = mlxsw_sp_dev_rif_type(mlxsw_sp, params->dev); 6610 ops = mlxsw_sp->rif_ops_arr[type]; 6611 6612 vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id ? : RT_TABLE_MAIN, extack); 6613 if (IS_ERR(vr)) 6614 return ERR_CAST(vr); 6615 vr->rif_count++; 6616 6617 err = mlxsw_sp_rif_index_alloc(mlxsw_sp, &rif_index); 6618 if (err) { 6619 NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported router interfaces"); 6620 goto err_rif_index_alloc; 6621 } 6622 6623 rif = mlxsw_sp_rif_alloc(ops->rif_size, rif_index, vr->id, params->dev); 6624 if (!rif) { 6625 err = -ENOMEM; 6626 goto err_rif_alloc; 6627 } 6628 dev_hold(rif->dev); 6629 mlxsw_sp->router->rifs[rif_index] = rif; 6630 rif->mlxsw_sp = mlxsw_sp; 6631 rif->ops = ops; 6632 6633 if (ops->fid_get) { 6634 fid = ops->fid_get(rif, extack); 6635 if (IS_ERR(fid)) { 6636 err = PTR_ERR(fid); 6637 goto err_fid_get; 6638 } 6639 rif->fid = fid; 6640 } 6641 6642 if (ops->setup) 6643 ops->setup(rif, params); 6644 6645 err = ops->configure(rif); 6646 if (err) 6647 goto err_configure; 6648 6649 for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) { 6650 err = mlxsw_sp_mr_rif_add(vr->mr_table[i], rif); 6651 if (err) 6652 goto err_mr_rif_add; 6653 } 6654 6655 mlxsw_sp_rif_counters_alloc(rif); 6656 6657 return rif; 6658 6659 err_mr_rif_add: 6660 for (i--; i >= 0; i--) 6661 mlxsw_sp_mr_rif_del(vr->mr_table[i], rif); 6662 ops->deconfigure(rif); 6663 err_configure: 6664 if (fid) 6665 mlxsw_sp_fid_put(fid); 6666 err_fid_get: 6667 mlxsw_sp->router->rifs[rif_index] = NULL; 6668 dev_put(rif->dev); 6669 kfree(rif); 6670 err_rif_alloc: 6671 err_rif_index_alloc: 6672 vr->rif_count--; 6673 mlxsw_sp_vr_put(mlxsw_sp, vr); 6674 return ERR_PTR(err); 6675 } 6676 6677 static void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif) 6678 { 6679 const struct mlxsw_sp_rif_ops *ops = rif->ops; 6680 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 6681 struct mlxsw_sp_fid *fid = rif->fid; 6682 struct mlxsw_sp_vr *vr; 6683 int i; 6684 6685 mlxsw_sp_router_rif_gone_sync(mlxsw_sp, rif); 6686 vr = &mlxsw_sp->router->vrs[rif->vr_id]; 6687 6688 mlxsw_sp_rif_counters_free(rif); 6689 for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) 6690 mlxsw_sp_mr_rif_del(vr->mr_table[i], rif); 6691 ops->deconfigure(rif); 6692 if (fid) 6693 /* Loopback RIFs are not associated with a FID. */ 6694 mlxsw_sp_fid_put(fid); 6695 mlxsw_sp->router->rifs[rif->rif_index] = NULL; 6696 dev_put(rif->dev); 6697 kfree(rif); 6698 vr->rif_count--; 6699 mlxsw_sp_vr_put(mlxsw_sp, vr); 6700 } 6701 6702 void mlxsw_sp_rif_destroy_by_dev(struct mlxsw_sp *mlxsw_sp, 6703 struct net_device *dev) 6704 { 6705 struct mlxsw_sp_rif *rif; 6706 6707 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 6708 if (!rif) 6709 return; 6710 mlxsw_sp_rif_destroy(rif); 6711 } 6712 6713 static void 6714 mlxsw_sp_rif_subport_params_init(struct mlxsw_sp_rif_params *params, 6715 struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) 6716 { 6717 struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; 6718 6719 params->vid = mlxsw_sp_port_vlan->vid; 6720 params->lag = mlxsw_sp_port->lagged; 6721 if (params->lag) 6722 params->lag_id = mlxsw_sp_port->lag_id; 6723 else 6724 params->system_port = mlxsw_sp_port->local_port; 6725 } 6726 6727 static struct mlxsw_sp_rif_subport * 6728 mlxsw_sp_rif_subport_rif(const struct mlxsw_sp_rif *rif) 6729 { 6730 return container_of(rif, struct mlxsw_sp_rif_subport, common); 6731 } 6732 6733 static struct mlxsw_sp_rif * 6734 mlxsw_sp_rif_subport_get(struct mlxsw_sp *mlxsw_sp, 6735 const struct mlxsw_sp_rif_params *params, 6736 struct netlink_ext_ack *extack) 6737 { 6738 struct mlxsw_sp_rif_subport *rif_subport; 6739 struct mlxsw_sp_rif *rif; 6740 6741 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, params->dev); 6742 if (!rif) 6743 return mlxsw_sp_rif_create(mlxsw_sp, params, extack); 6744 6745 rif_subport = mlxsw_sp_rif_subport_rif(rif); 6746 refcount_inc(&rif_subport->ref_count); 6747 return rif; 6748 } 6749 6750 static void mlxsw_sp_rif_subport_put(struct mlxsw_sp_rif *rif) 6751 { 6752 struct mlxsw_sp_rif_subport *rif_subport; 6753 6754 rif_subport = mlxsw_sp_rif_subport_rif(rif); 6755 if (!refcount_dec_and_test(&rif_subport->ref_count)) 6756 return; 6757 6758 mlxsw_sp_rif_destroy(rif); 6759 } 6760 6761 static int 6762 mlxsw_sp_port_vlan_router_join(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan, 6763 struct net_device *l3_dev, 6764 struct netlink_ext_ack *extack) 6765 { 6766 struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; 6767 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp; 6768 struct mlxsw_sp_rif_params params = { 6769 .dev = l3_dev, 6770 }; 6771 u16 vid = mlxsw_sp_port_vlan->vid; 6772 struct mlxsw_sp_rif *rif; 6773 struct mlxsw_sp_fid *fid; 6774 int err; 6775 6776 mlxsw_sp_rif_subport_params_init(¶ms, mlxsw_sp_port_vlan); 6777 rif = mlxsw_sp_rif_subport_get(mlxsw_sp, ¶ms, extack); 6778 if (IS_ERR(rif)) 6779 return PTR_ERR(rif); 6780 6781 /* FID was already created, just take a reference */ 6782 fid = rif->ops->fid_get(rif, extack); 6783 err = mlxsw_sp_fid_port_vid_map(fid, mlxsw_sp_port, vid); 6784 if (err) 6785 goto err_fid_port_vid_map; 6786 6787 err = mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, false); 6788 if (err) 6789 goto err_port_vid_learning_set; 6790 6791 err = mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid, 6792 BR_STATE_FORWARDING); 6793 if (err) 6794 goto err_port_vid_stp_set; 6795 6796 mlxsw_sp_port_vlan->fid = fid; 6797 6798 return 0; 6799 6800 err_port_vid_stp_set: 6801 mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true); 6802 err_port_vid_learning_set: 6803 mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid); 6804 err_fid_port_vid_map: 6805 mlxsw_sp_fid_put(fid); 6806 mlxsw_sp_rif_subport_put(rif); 6807 return err; 6808 } 6809 6810 void 6811 mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) 6812 { 6813 struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; 6814 struct mlxsw_sp_fid *fid = mlxsw_sp_port_vlan->fid; 6815 struct mlxsw_sp_rif *rif = mlxsw_sp_fid_rif(fid); 6816 u16 vid = mlxsw_sp_port_vlan->vid; 6817 6818 if (WARN_ON(mlxsw_sp_fid_type(fid) != MLXSW_SP_FID_TYPE_RFID)) 6819 return; 6820 6821 mlxsw_sp_port_vlan->fid = NULL; 6822 mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid, BR_STATE_BLOCKING); 6823 mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true); 6824 mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid); 6825 mlxsw_sp_fid_put(fid); 6826 mlxsw_sp_rif_subport_put(rif); 6827 } 6828 6829 static int mlxsw_sp_inetaddr_port_vlan_event(struct net_device *l3_dev, 6830 struct net_device *port_dev, 6831 unsigned long event, u16 vid, 6832 struct netlink_ext_ack *extack) 6833 { 6834 struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(port_dev); 6835 struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan; 6836 6837 mlxsw_sp_port_vlan = mlxsw_sp_port_vlan_find_by_vid(mlxsw_sp_port, vid); 6838 if (WARN_ON(!mlxsw_sp_port_vlan)) 6839 return -EINVAL; 6840 6841 switch (event) { 6842 case NETDEV_UP: 6843 return mlxsw_sp_port_vlan_router_join(mlxsw_sp_port_vlan, 6844 l3_dev, extack); 6845 case NETDEV_DOWN: 6846 mlxsw_sp_port_vlan_router_leave(mlxsw_sp_port_vlan); 6847 break; 6848 } 6849 6850 return 0; 6851 } 6852 6853 static int mlxsw_sp_inetaddr_port_event(struct net_device *port_dev, 6854 unsigned long event, 6855 struct netlink_ext_ack *extack) 6856 { 6857 if (netif_is_bridge_port(port_dev) || 6858 netif_is_lag_port(port_dev) || 6859 netif_is_ovs_port(port_dev)) 6860 return 0; 6861 6862 return mlxsw_sp_inetaddr_port_vlan_event(port_dev, port_dev, event, 6863 MLXSW_SP_DEFAULT_VID, extack); 6864 } 6865 6866 static int __mlxsw_sp_inetaddr_lag_event(struct net_device *l3_dev, 6867 struct net_device *lag_dev, 6868 unsigned long event, u16 vid, 6869 struct netlink_ext_ack *extack) 6870 { 6871 struct net_device *port_dev; 6872 struct list_head *iter; 6873 int err; 6874 6875 netdev_for_each_lower_dev(lag_dev, port_dev, iter) { 6876 if (mlxsw_sp_port_dev_check(port_dev)) { 6877 err = mlxsw_sp_inetaddr_port_vlan_event(l3_dev, 6878 port_dev, 6879 event, vid, 6880 extack); 6881 if (err) 6882 return err; 6883 } 6884 } 6885 6886 return 0; 6887 } 6888 6889 static int mlxsw_sp_inetaddr_lag_event(struct net_device *lag_dev, 6890 unsigned long event, 6891 struct netlink_ext_ack *extack) 6892 { 6893 if (netif_is_bridge_port(lag_dev)) 6894 return 0; 6895 6896 return __mlxsw_sp_inetaddr_lag_event(lag_dev, lag_dev, event, 6897 MLXSW_SP_DEFAULT_VID, extack); 6898 } 6899 6900 static int mlxsw_sp_inetaddr_bridge_event(struct mlxsw_sp *mlxsw_sp, 6901 struct net_device *l3_dev, 6902 unsigned long event, 6903 struct netlink_ext_ack *extack) 6904 { 6905 struct mlxsw_sp_rif_params params = { 6906 .dev = l3_dev, 6907 }; 6908 struct mlxsw_sp_rif *rif; 6909 6910 switch (event) { 6911 case NETDEV_UP: 6912 rif = mlxsw_sp_rif_create(mlxsw_sp, ¶ms, extack); 6913 if (IS_ERR(rif)) 6914 return PTR_ERR(rif); 6915 break; 6916 case NETDEV_DOWN: 6917 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 6918 mlxsw_sp_rif_destroy(rif); 6919 break; 6920 } 6921 6922 return 0; 6923 } 6924 6925 static int mlxsw_sp_inetaddr_vlan_event(struct mlxsw_sp *mlxsw_sp, 6926 struct net_device *vlan_dev, 6927 unsigned long event, 6928 struct netlink_ext_ack *extack) 6929 { 6930 struct net_device *real_dev = vlan_dev_real_dev(vlan_dev); 6931 u16 vid = vlan_dev_vlan_id(vlan_dev); 6932 6933 if (netif_is_bridge_port(vlan_dev)) 6934 return 0; 6935 6936 if (mlxsw_sp_port_dev_check(real_dev)) 6937 return mlxsw_sp_inetaddr_port_vlan_event(vlan_dev, real_dev, 6938 event, vid, extack); 6939 else if (netif_is_lag_master(real_dev)) 6940 return __mlxsw_sp_inetaddr_lag_event(vlan_dev, real_dev, event, 6941 vid, extack); 6942 else if (netif_is_bridge_master(real_dev) && br_vlan_enabled(real_dev)) 6943 return mlxsw_sp_inetaddr_bridge_event(mlxsw_sp, vlan_dev, event, 6944 extack); 6945 6946 return 0; 6947 } 6948 6949 static bool mlxsw_sp_rif_macvlan_is_vrrp4(const u8 *mac) 6950 { 6951 u8 vrrp4[ETH_ALEN] = { 0x00, 0x00, 0x5e, 0x00, 0x01, 0x00 }; 6952 u8 mask[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }; 6953 6954 return ether_addr_equal_masked(mac, vrrp4, mask); 6955 } 6956 6957 static bool mlxsw_sp_rif_macvlan_is_vrrp6(const u8 *mac) 6958 { 6959 u8 vrrp6[ETH_ALEN] = { 0x00, 0x00, 0x5e, 0x00, 0x02, 0x00 }; 6960 u8 mask[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }; 6961 6962 return ether_addr_equal_masked(mac, vrrp6, mask); 6963 } 6964 6965 static int mlxsw_sp_rif_vrrp_op(struct mlxsw_sp *mlxsw_sp, u16 rif_index, 6966 const u8 *mac, bool adding) 6967 { 6968 char ritr_pl[MLXSW_REG_RITR_LEN]; 6969 u8 vrrp_id = adding ? mac[5] : 0; 6970 int err; 6971 6972 if (!mlxsw_sp_rif_macvlan_is_vrrp4(mac) && 6973 !mlxsw_sp_rif_macvlan_is_vrrp6(mac)) 6974 return 0; 6975 6976 mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index); 6977 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6978 if (err) 6979 return err; 6980 6981 if (mlxsw_sp_rif_macvlan_is_vrrp4(mac)) 6982 mlxsw_reg_ritr_if_vrrp_id_ipv4_set(ritr_pl, vrrp_id); 6983 else 6984 mlxsw_reg_ritr_if_vrrp_id_ipv6_set(ritr_pl, vrrp_id); 6985 6986 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6987 } 6988 6989 static int mlxsw_sp_rif_macvlan_add(struct mlxsw_sp *mlxsw_sp, 6990 const struct net_device *macvlan_dev, 6991 struct netlink_ext_ack *extack) 6992 { 6993 struct macvlan_dev *vlan = netdev_priv(macvlan_dev); 6994 struct mlxsw_sp_rif *rif; 6995 int err; 6996 6997 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, vlan->lowerdev); 6998 if (!rif) { 6999 NL_SET_ERR_MSG_MOD(extack, "macvlan is only supported on top of router interfaces"); 7000 return -EOPNOTSUPP; 7001 } 7002 7003 err = mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr, 7004 mlxsw_sp_fid_index(rif->fid), true); 7005 if (err) 7006 return err; 7007 7008 err = mlxsw_sp_rif_vrrp_op(mlxsw_sp, rif->rif_index, 7009 macvlan_dev->dev_addr, true); 7010 if (err) 7011 goto err_rif_vrrp_add; 7012 7013 /* Make sure the bridge driver does not have this MAC pointing at 7014 * some other port. 7015 */ 7016 if (rif->ops->fdb_del) 7017 rif->ops->fdb_del(rif, macvlan_dev->dev_addr); 7018 7019 return 0; 7020 7021 err_rif_vrrp_add: 7022 mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr, 7023 mlxsw_sp_fid_index(rif->fid), false); 7024 return err; 7025 } 7026 7027 void mlxsw_sp_rif_macvlan_del(struct mlxsw_sp *mlxsw_sp, 7028 const struct net_device *macvlan_dev) 7029 { 7030 struct macvlan_dev *vlan = netdev_priv(macvlan_dev); 7031 struct mlxsw_sp_rif *rif; 7032 7033 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, vlan->lowerdev); 7034 /* If we do not have a RIF, then we already took care of 7035 * removing the macvlan's MAC during RIF deletion. 7036 */ 7037 if (!rif) 7038 return; 7039 mlxsw_sp_rif_vrrp_op(mlxsw_sp, rif->rif_index, macvlan_dev->dev_addr, 7040 false); 7041 mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr, 7042 mlxsw_sp_fid_index(rif->fid), false); 7043 } 7044 7045 static int mlxsw_sp_inetaddr_macvlan_event(struct mlxsw_sp *mlxsw_sp, 7046 struct net_device *macvlan_dev, 7047 unsigned long event, 7048 struct netlink_ext_ack *extack) 7049 { 7050 switch (event) { 7051 case NETDEV_UP: 7052 return mlxsw_sp_rif_macvlan_add(mlxsw_sp, macvlan_dev, extack); 7053 case NETDEV_DOWN: 7054 mlxsw_sp_rif_macvlan_del(mlxsw_sp, macvlan_dev); 7055 break; 7056 } 7057 7058 return 0; 7059 } 7060 7061 static int mlxsw_sp_router_port_check_rif_addr(struct mlxsw_sp *mlxsw_sp, 7062 struct net_device *dev, 7063 const unsigned char *dev_addr, 7064 struct netlink_ext_ack *extack) 7065 { 7066 struct mlxsw_sp_rif *rif; 7067 int i; 7068 7069 /* A RIF is not created for macvlan netdevs. Their MAC is used to 7070 * populate the FDB 7071 */ 7072 if (netif_is_macvlan(dev) || netif_is_l3_master(dev)) 7073 return 0; 7074 7075 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) { 7076 rif = mlxsw_sp->router->rifs[i]; 7077 if (rif && rif->dev && rif->dev != dev && 7078 !ether_addr_equal_masked(rif->dev->dev_addr, dev_addr, 7079 mlxsw_sp->mac_mask)) { 7080 NL_SET_ERR_MSG_MOD(extack, "All router interface MAC addresses must have the same prefix"); 7081 return -EINVAL; 7082 } 7083 } 7084 7085 return 0; 7086 } 7087 7088 static int __mlxsw_sp_inetaddr_event(struct mlxsw_sp *mlxsw_sp, 7089 struct net_device *dev, 7090 unsigned long event, 7091 struct netlink_ext_ack *extack) 7092 { 7093 if (mlxsw_sp_port_dev_check(dev)) 7094 return mlxsw_sp_inetaddr_port_event(dev, event, extack); 7095 else if (netif_is_lag_master(dev)) 7096 return mlxsw_sp_inetaddr_lag_event(dev, event, extack); 7097 else if (netif_is_bridge_master(dev)) 7098 return mlxsw_sp_inetaddr_bridge_event(mlxsw_sp, dev, event, 7099 extack); 7100 else if (is_vlan_dev(dev)) 7101 return mlxsw_sp_inetaddr_vlan_event(mlxsw_sp, dev, event, 7102 extack); 7103 else if (netif_is_macvlan(dev)) 7104 return mlxsw_sp_inetaddr_macvlan_event(mlxsw_sp, dev, event, 7105 extack); 7106 else 7107 return 0; 7108 } 7109 7110 static int mlxsw_sp_inetaddr_event(struct notifier_block *nb, 7111 unsigned long event, void *ptr) 7112 { 7113 struct in_ifaddr *ifa = (struct in_ifaddr *) ptr; 7114 struct net_device *dev = ifa->ifa_dev->dev; 7115 struct mlxsw_sp_router *router; 7116 struct mlxsw_sp_rif *rif; 7117 int err = 0; 7118 7119 /* NETDEV_UP event is handled by mlxsw_sp_inetaddr_valid_event */ 7120 if (event == NETDEV_UP) 7121 goto out; 7122 7123 router = container_of(nb, struct mlxsw_sp_router, inetaddr_nb); 7124 rif = mlxsw_sp_rif_find_by_dev(router->mlxsw_sp, dev); 7125 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 7126 goto out; 7127 7128 err = __mlxsw_sp_inetaddr_event(router->mlxsw_sp, dev, event, NULL); 7129 out: 7130 return notifier_from_errno(err); 7131 } 7132 7133 int mlxsw_sp_inetaddr_valid_event(struct notifier_block *unused, 7134 unsigned long event, void *ptr) 7135 { 7136 struct in_validator_info *ivi = (struct in_validator_info *) ptr; 7137 struct net_device *dev = ivi->ivi_dev->dev; 7138 struct mlxsw_sp *mlxsw_sp; 7139 struct mlxsw_sp_rif *rif; 7140 int err = 0; 7141 7142 mlxsw_sp = mlxsw_sp_lower_get(dev); 7143 if (!mlxsw_sp) 7144 goto out; 7145 7146 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 7147 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 7148 goto out; 7149 7150 err = mlxsw_sp_router_port_check_rif_addr(mlxsw_sp, dev, dev->dev_addr, 7151 ivi->extack); 7152 if (err) 7153 goto out; 7154 7155 err = __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, ivi->extack); 7156 out: 7157 return notifier_from_errno(err); 7158 } 7159 7160 struct mlxsw_sp_inet6addr_event_work { 7161 struct work_struct work; 7162 struct mlxsw_sp *mlxsw_sp; 7163 struct net_device *dev; 7164 unsigned long event; 7165 }; 7166 7167 static void mlxsw_sp_inet6addr_event_work(struct work_struct *work) 7168 { 7169 struct mlxsw_sp_inet6addr_event_work *inet6addr_work = 7170 container_of(work, struct mlxsw_sp_inet6addr_event_work, work); 7171 struct mlxsw_sp *mlxsw_sp = inet6addr_work->mlxsw_sp; 7172 struct net_device *dev = inet6addr_work->dev; 7173 unsigned long event = inet6addr_work->event; 7174 struct mlxsw_sp_rif *rif; 7175 7176 rtnl_lock(); 7177 7178 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 7179 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 7180 goto out; 7181 7182 __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, NULL); 7183 out: 7184 rtnl_unlock(); 7185 dev_put(dev); 7186 kfree(inet6addr_work); 7187 } 7188 7189 /* Called with rcu_read_lock() */ 7190 static int mlxsw_sp_inet6addr_event(struct notifier_block *nb, 7191 unsigned long event, void *ptr) 7192 { 7193 struct inet6_ifaddr *if6 = (struct inet6_ifaddr *) ptr; 7194 struct mlxsw_sp_inet6addr_event_work *inet6addr_work; 7195 struct net_device *dev = if6->idev->dev; 7196 struct mlxsw_sp_router *router; 7197 7198 /* NETDEV_UP event is handled by mlxsw_sp_inet6addr_valid_event */ 7199 if (event == NETDEV_UP) 7200 return NOTIFY_DONE; 7201 7202 inet6addr_work = kzalloc(sizeof(*inet6addr_work), GFP_ATOMIC); 7203 if (!inet6addr_work) 7204 return NOTIFY_BAD; 7205 7206 router = container_of(nb, struct mlxsw_sp_router, inet6addr_nb); 7207 INIT_WORK(&inet6addr_work->work, mlxsw_sp_inet6addr_event_work); 7208 inet6addr_work->mlxsw_sp = router->mlxsw_sp; 7209 inet6addr_work->dev = dev; 7210 inet6addr_work->event = event; 7211 dev_hold(dev); 7212 mlxsw_core_schedule_work(&inet6addr_work->work); 7213 7214 return NOTIFY_DONE; 7215 } 7216 7217 int mlxsw_sp_inet6addr_valid_event(struct notifier_block *unused, 7218 unsigned long event, void *ptr) 7219 { 7220 struct in6_validator_info *i6vi = (struct in6_validator_info *) ptr; 7221 struct net_device *dev = i6vi->i6vi_dev->dev; 7222 struct mlxsw_sp *mlxsw_sp; 7223 struct mlxsw_sp_rif *rif; 7224 int err = 0; 7225 7226 mlxsw_sp = mlxsw_sp_lower_get(dev); 7227 if (!mlxsw_sp) 7228 goto out; 7229 7230 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 7231 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 7232 goto out; 7233 7234 err = mlxsw_sp_router_port_check_rif_addr(mlxsw_sp, dev, dev->dev_addr, 7235 i6vi->extack); 7236 if (err) 7237 goto out; 7238 7239 err = __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, i6vi->extack); 7240 out: 7241 return notifier_from_errno(err); 7242 } 7243 7244 static int mlxsw_sp_rif_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index, 7245 const char *mac, int mtu) 7246 { 7247 char ritr_pl[MLXSW_REG_RITR_LEN]; 7248 int err; 7249 7250 mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index); 7251 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7252 if (err) 7253 return err; 7254 7255 mlxsw_reg_ritr_mtu_set(ritr_pl, mtu); 7256 mlxsw_reg_ritr_if_mac_memcpy_to(ritr_pl, mac); 7257 mlxsw_reg_ritr_op_set(ritr_pl, MLXSW_REG_RITR_RIF_CREATE); 7258 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7259 } 7260 7261 static int 7262 mlxsw_sp_router_port_change_event(struct mlxsw_sp *mlxsw_sp, 7263 struct mlxsw_sp_rif *rif) 7264 { 7265 struct net_device *dev = rif->dev; 7266 u16 fid_index; 7267 int err; 7268 7269 fid_index = mlxsw_sp_fid_index(rif->fid); 7270 7271 err = mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, false); 7272 if (err) 7273 return err; 7274 7275 err = mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, dev->dev_addr, 7276 dev->mtu); 7277 if (err) 7278 goto err_rif_edit; 7279 7280 err = mlxsw_sp_rif_fdb_op(mlxsw_sp, dev->dev_addr, fid_index, true); 7281 if (err) 7282 goto err_rif_fdb_op; 7283 7284 if (rif->mtu != dev->mtu) { 7285 struct mlxsw_sp_vr *vr; 7286 int i; 7287 7288 /* The RIF is relevant only to its mr_table instance, as unlike 7289 * unicast routing, in multicast routing a RIF cannot be shared 7290 * between several multicast routing tables. 7291 */ 7292 vr = &mlxsw_sp->router->vrs[rif->vr_id]; 7293 for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) 7294 mlxsw_sp_mr_rif_mtu_update(vr->mr_table[i], 7295 rif, dev->mtu); 7296 } 7297 7298 ether_addr_copy(rif->addr, dev->dev_addr); 7299 rif->mtu = dev->mtu; 7300 7301 netdev_dbg(dev, "Updated RIF=%d\n", rif->rif_index); 7302 7303 return 0; 7304 7305 err_rif_fdb_op: 7306 mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, rif->addr, rif->mtu); 7307 err_rif_edit: 7308 mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, true); 7309 return err; 7310 } 7311 7312 static int mlxsw_sp_router_port_pre_changeaddr_event(struct mlxsw_sp_rif *rif, 7313 struct netdev_notifier_pre_changeaddr_info *info) 7314 { 7315 struct netlink_ext_ack *extack; 7316 7317 extack = netdev_notifier_info_to_extack(&info->info); 7318 return mlxsw_sp_router_port_check_rif_addr(rif->mlxsw_sp, rif->dev, 7319 info->dev_addr, extack); 7320 } 7321 7322 int mlxsw_sp_netdevice_router_port_event(struct net_device *dev, 7323 unsigned long event, void *ptr) 7324 { 7325 struct mlxsw_sp *mlxsw_sp; 7326 struct mlxsw_sp_rif *rif; 7327 7328 mlxsw_sp = mlxsw_sp_lower_get(dev); 7329 if (!mlxsw_sp) 7330 return 0; 7331 7332 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 7333 if (!rif) 7334 return 0; 7335 7336 switch (event) { 7337 case NETDEV_CHANGEMTU: /* fall through */ 7338 case NETDEV_CHANGEADDR: 7339 return mlxsw_sp_router_port_change_event(mlxsw_sp, rif); 7340 case NETDEV_PRE_CHANGEADDR: 7341 return mlxsw_sp_router_port_pre_changeaddr_event(rif, ptr); 7342 } 7343 7344 return 0; 7345 } 7346 7347 static int mlxsw_sp_port_vrf_join(struct mlxsw_sp *mlxsw_sp, 7348 struct net_device *l3_dev, 7349 struct netlink_ext_ack *extack) 7350 { 7351 struct mlxsw_sp_rif *rif; 7352 7353 /* If netdev is already associated with a RIF, then we need to 7354 * destroy it and create a new one with the new virtual router ID. 7355 */ 7356 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 7357 if (rif) 7358 __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_DOWN, 7359 extack); 7360 7361 return __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_UP, extack); 7362 } 7363 7364 static void mlxsw_sp_port_vrf_leave(struct mlxsw_sp *mlxsw_sp, 7365 struct net_device *l3_dev) 7366 { 7367 struct mlxsw_sp_rif *rif; 7368 7369 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 7370 if (!rif) 7371 return; 7372 __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_DOWN, NULL); 7373 } 7374 7375 int mlxsw_sp_netdevice_vrf_event(struct net_device *l3_dev, unsigned long event, 7376 struct netdev_notifier_changeupper_info *info) 7377 { 7378 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_lower_get(l3_dev); 7379 int err = 0; 7380 7381 /* We do not create a RIF for a macvlan, but only use it to 7382 * direct more MAC addresses to the router. 7383 */ 7384 if (!mlxsw_sp || netif_is_macvlan(l3_dev)) 7385 return 0; 7386 7387 switch (event) { 7388 case NETDEV_PRECHANGEUPPER: 7389 return 0; 7390 case NETDEV_CHANGEUPPER: 7391 if (info->linking) { 7392 struct netlink_ext_ack *extack; 7393 7394 extack = netdev_notifier_info_to_extack(&info->info); 7395 err = mlxsw_sp_port_vrf_join(mlxsw_sp, l3_dev, extack); 7396 } else { 7397 mlxsw_sp_port_vrf_leave(mlxsw_sp, l3_dev); 7398 } 7399 break; 7400 } 7401 7402 return err; 7403 } 7404 7405 static int __mlxsw_sp_rif_macvlan_flush(struct net_device *dev, void *data) 7406 { 7407 struct mlxsw_sp_rif *rif = data; 7408 7409 if (!netif_is_macvlan(dev)) 7410 return 0; 7411 7412 return mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, dev->dev_addr, 7413 mlxsw_sp_fid_index(rif->fid), false); 7414 } 7415 7416 static int mlxsw_sp_rif_macvlan_flush(struct mlxsw_sp_rif *rif) 7417 { 7418 if (!netif_is_macvlan_port(rif->dev)) 7419 return 0; 7420 7421 netdev_warn(rif->dev, "Router interface is deleted. Upper macvlans will not work\n"); 7422 return netdev_walk_all_upper_dev_rcu(rif->dev, 7423 __mlxsw_sp_rif_macvlan_flush, rif); 7424 } 7425 7426 static void mlxsw_sp_rif_subport_setup(struct mlxsw_sp_rif *rif, 7427 const struct mlxsw_sp_rif_params *params) 7428 { 7429 struct mlxsw_sp_rif_subport *rif_subport; 7430 7431 rif_subport = mlxsw_sp_rif_subport_rif(rif); 7432 refcount_set(&rif_subport->ref_count, 1); 7433 rif_subport->vid = params->vid; 7434 rif_subport->lag = params->lag; 7435 if (params->lag) 7436 rif_subport->lag_id = params->lag_id; 7437 else 7438 rif_subport->system_port = params->system_port; 7439 } 7440 7441 static int mlxsw_sp_rif_subport_op(struct mlxsw_sp_rif *rif, bool enable) 7442 { 7443 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7444 struct mlxsw_sp_rif_subport *rif_subport; 7445 char ritr_pl[MLXSW_REG_RITR_LEN]; 7446 7447 rif_subport = mlxsw_sp_rif_subport_rif(rif); 7448 mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_SP_IF, 7449 rif->rif_index, rif->vr_id, rif->dev->mtu); 7450 mlxsw_reg_ritr_mac_pack(ritr_pl, rif->dev->dev_addr); 7451 mlxsw_reg_ritr_sp_if_pack(ritr_pl, rif_subport->lag, 7452 rif_subport->lag ? rif_subport->lag_id : 7453 rif_subport->system_port, 7454 rif_subport->vid); 7455 7456 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7457 } 7458 7459 static int mlxsw_sp_rif_subport_configure(struct mlxsw_sp_rif *rif) 7460 { 7461 int err; 7462 7463 err = mlxsw_sp_rif_subport_op(rif, true); 7464 if (err) 7465 return err; 7466 7467 err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 7468 mlxsw_sp_fid_index(rif->fid), true); 7469 if (err) 7470 goto err_rif_fdb_op; 7471 7472 mlxsw_sp_fid_rif_set(rif->fid, rif); 7473 return 0; 7474 7475 err_rif_fdb_op: 7476 mlxsw_sp_rif_subport_op(rif, false); 7477 return err; 7478 } 7479 7480 static void mlxsw_sp_rif_subport_deconfigure(struct mlxsw_sp_rif *rif) 7481 { 7482 struct mlxsw_sp_fid *fid = rif->fid; 7483 7484 mlxsw_sp_fid_rif_set(fid, NULL); 7485 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 7486 mlxsw_sp_fid_index(fid), false); 7487 mlxsw_sp_rif_macvlan_flush(rif); 7488 mlxsw_sp_rif_subport_op(rif, false); 7489 } 7490 7491 static struct mlxsw_sp_fid * 7492 mlxsw_sp_rif_subport_fid_get(struct mlxsw_sp_rif *rif, 7493 struct netlink_ext_ack *extack) 7494 { 7495 return mlxsw_sp_fid_rfid_get(rif->mlxsw_sp, rif->rif_index); 7496 } 7497 7498 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_subport_ops = { 7499 .type = MLXSW_SP_RIF_TYPE_SUBPORT, 7500 .rif_size = sizeof(struct mlxsw_sp_rif_subport), 7501 .setup = mlxsw_sp_rif_subport_setup, 7502 .configure = mlxsw_sp_rif_subport_configure, 7503 .deconfigure = mlxsw_sp_rif_subport_deconfigure, 7504 .fid_get = mlxsw_sp_rif_subport_fid_get, 7505 }; 7506 7507 static int mlxsw_sp_rif_vlan_fid_op(struct mlxsw_sp_rif *rif, 7508 enum mlxsw_reg_ritr_if_type type, 7509 u16 vid_fid, bool enable) 7510 { 7511 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7512 char ritr_pl[MLXSW_REG_RITR_LEN]; 7513 7514 mlxsw_reg_ritr_pack(ritr_pl, enable, type, rif->rif_index, rif->vr_id, 7515 rif->dev->mtu); 7516 mlxsw_reg_ritr_mac_pack(ritr_pl, rif->dev->dev_addr); 7517 mlxsw_reg_ritr_fid_set(ritr_pl, type, vid_fid); 7518 7519 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7520 } 7521 7522 u8 mlxsw_sp_router_port(const struct mlxsw_sp *mlxsw_sp) 7523 { 7524 return mlxsw_core_max_ports(mlxsw_sp->core) + 1; 7525 } 7526 7527 static int mlxsw_sp_rif_vlan_configure(struct mlxsw_sp_rif *rif) 7528 { 7529 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7530 u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid); 7531 int err; 7532 7533 err = mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_VLAN_IF, vid, true); 7534 if (err) 7535 return err; 7536 7537 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 7538 mlxsw_sp_router_port(mlxsw_sp), true); 7539 if (err) 7540 goto err_fid_mc_flood_set; 7541 7542 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 7543 mlxsw_sp_router_port(mlxsw_sp), true); 7544 if (err) 7545 goto err_fid_bc_flood_set; 7546 7547 err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 7548 mlxsw_sp_fid_index(rif->fid), true); 7549 if (err) 7550 goto err_rif_fdb_op; 7551 7552 mlxsw_sp_fid_rif_set(rif->fid, rif); 7553 return 0; 7554 7555 err_rif_fdb_op: 7556 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 7557 mlxsw_sp_router_port(mlxsw_sp), false); 7558 err_fid_bc_flood_set: 7559 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 7560 mlxsw_sp_router_port(mlxsw_sp), false); 7561 err_fid_mc_flood_set: 7562 mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_VLAN_IF, vid, false); 7563 return err; 7564 } 7565 7566 static void mlxsw_sp_rif_vlan_deconfigure(struct mlxsw_sp_rif *rif) 7567 { 7568 u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid); 7569 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7570 struct mlxsw_sp_fid *fid = rif->fid; 7571 7572 mlxsw_sp_fid_rif_set(fid, NULL); 7573 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 7574 mlxsw_sp_fid_index(fid), false); 7575 mlxsw_sp_rif_macvlan_flush(rif); 7576 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 7577 mlxsw_sp_router_port(mlxsw_sp), false); 7578 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 7579 mlxsw_sp_router_port(mlxsw_sp), false); 7580 mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_VLAN_IF, vid, false); 7581 } 7582 7583 static struct mlxsw_sp_fid * 7584 mlxsw_sp_rif_vlan_fid_get(struct mlxsw_sp_rif *rif, 7585 struct netlink_ext_ack *extack) 7586 { 7587 struct net_device *br_dev = rif->dev; 7588 u16 vid; 7589 int err; 7590 7591 if (is_vlan_dev(rif->dev)) { 7592 vid = vlan_dev_vlan_id(rif->dev); 7593 br_dev = vlan_dev_real_dev(rif->dev); 7594 if (WARN_ON(!netif_is_bridge_master(br_dev))) 7595 return ERR_PTR(-EINVAL); 7596 } else { 7597 err = br_vlan_get_pvid(rif->dev, &vid); 7598 if (err < 0 || !vid) { 7599 NL_SET_ERR_MSG_MOD(extack, "Couldn't determine bridge PVID"); 7600 return ERR_PTR(-EINVAL); 7601 } 7602 } 7603 7604 return mlxsw_sp_bridge_fid_get(rif->mlxsw_sp, br_dev, vid, extack); 7605 } 7606 7607 static void mlxsw_sp_rif_vlan_fdb_del(struct mlxsw_sp_rif *rif, const char *mac) 7608 { 7609 u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid); 7610 struct switchdev_notifier_fdb_info info; 7611 struct net_device *br_dev; 7612 struct net_device *dev; 7613 7614 br_dev = is_vlan_dev(rif->dev) ? vlan_dev_real_dev(rif->dev) : rif->dev; 7615 dev = br_fdb_find_port(br_dev, mac, vid); 7616 if (!dev) 7617 return; 7618 7619 info.addr = mac; 7620 info.vid = vid; 7621 call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE, dev, &info.info, 7622 NULL); 7623 } 7624 7625 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_vlan_ops = { 7626 .type = MLXSW_SP_RIF_TYPE_VLAN, 7627 .rif_size = sizeof(struct mlxsw_sp_rif), 7628 .configure = mlxsw_sp_rif_vlan_configure, 7629 .deconfigure = mlxsw_sp_rif_vlan_deconfigure, 7630 .fid_get = mlxsw_sp_rif_vlan_fid_get, 7631 .fdb_del = mlxsw_sp_rif_vlan_fdb_del, 7632 }; 7633 7634 static int mlxsw_sp_rif_fid_configure(struct mlxsw_sp_rif *rif) 7635 { 7636 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7637 u16 fid_index = mlxsw_sp_fid_index(rif->fid); 7638 int err; 7639 7640 err = mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, 7641 true); 7642 if (err) 7643 return err; 7644 7645 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 7646 mlxsw_sp_router_port(mlxsw_sp), true); 7647 if (err) 7648 goto err_fid_mc_flood_set; 7649 7650 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 7651 mlxsw_sp_router_port(mlxsw_sp), true); 7652 if (err) 7653 goto err_fid_bc_flood_set; 7654 7655 err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 7656 mlxsw_sp_fid_index(rif->fid), true); 7657 if (err) 7658 goto err_rif_fdb_op; 7659 7660 mlxsw_sp_fid_rif_set(rif->fid, rif); 7661 return 0; 7662 7663 err_rif_fdb_op: 7664 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 7665 mlxsw_sp_router_port(mlxsw_sp), false); 7666 err_fid_bc_flood_set: 7667 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 7668 mlxsw_sp_router_port(mlxsw_sp), false); 7669 err_fid_mc_flood_set: 7670 mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, false); 7671 return err; 7672 } 7673 7674 static void mlxsw_sp_rif_fid_deconfigure(struct mlxsw_sp_rif *rif) 7675 { 7676 u16 fid_index = mlxsw_sp_fid_index(rif->fid); 7677 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7678 struct mlxsw_sp_fid *fid = rif->fid; 7679 7680 mlxsw_sp_fid_rif_set(fid, NULL); 7681 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 7682 mlxsw_sp_fid_index(fid), false); 7683 mlxsw_sp_rif_macvlan_flush(rif); 7684 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 7685 mlxsw_sp_router_port(mlxsw_sp), false); 7686 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 7687 mlxsw_sp_router_port(mlxsw_sp), false); 7688 mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, false); 7689 } 7690 7691 static struct mlxsw_sp_fid * 7692 mlxsw_sp_rif_fid_fid_get(struct mlxsw_sp_rif *rif, 7693 struct netlink_ext_ack *extack) 7694 { 7695 return mlxsw_sp_bridge_fid_get(rif->mlxsw_sp, rif->dev, 0, extack); 7696 } 7697 7698 static void mlxsw_sp_rif_fid_fdb_del(struct mlxsw_sp_rif *rif, const char *mac) 7699 { 7700 struct switchdev_notifier_fdb_info info; 7701 struct net_device *dev; 7702 7703 dev = br_fdb_find_port(rif->dev, mac, 0); 7704 if (!dev) 7705 return; 7706 7707 info.addr = mac; 7708 info.vid = 0; 7709 call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE, dev, &info.info, 7710 NULL); 7711 } 7712 7713 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_fid_ops = { 7714 .type = MLXSW_SP_RIF_TYPE_FID, 7715 .rif_size = sizeof(struct mlxsw_sp_rif), 7716 .configure = mlxsw_sp_rif_fid_configure, 7717 .deconfigure = mlxsw_sp_rif_fid_deconfigure, 7718 .fid_get = mlxsw_sp_rif_fid_fid_get, 7719 .fdb_del = mlxsw_sp_rif_fid_fdb_del, 7720 }; 7721 7722 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_vlan_emu_ops = { 7723 .type = MLXSW_SP_RIF_TYPE_VLAN, 7724 .rif_size = sizeof(struct mlxsw_sp_rif), 7725 .configure = mlxsw_sp_rif_fid_configure, 7726 .deconfigure = mlxsw_sp_rif_fid_deconfigure, 7727 .fid_get = mlxsw_sp_rif_vlan_fid_get, 7728 .fdb_del = mlxsw_sp_rif_vlan_fdb_del, 7729 }; 7730 7731 static struct mlxsw_sp_rif_ipip_lb * 7732 mlxsw_sp_rif_ipip_lb_rif(struct mlxsw_sp_rif *rif) 7733 { 7734 return container_of(rif, struct mlxsw_sp_rif_ipip_lb, common); 7735 } 7736 7737 static void 7738 mlxsw_sp_rif_ipip_lb_setup(struct mlxsw_sp_rif *rif, 7739 const struct mlxsw_sp_rif_params *params) 7740 { 7741 struct mlxsw_sp_rif_params_ipip_lb *params_lb; 7742 struct mlxsw_sp_rif_ipip_lb *rif_lb; 7743 7744 params_lb = container_of(params, struct mlxsw_sp_rif_params_ipip_lb, 7745 common); 7746 rif_lb = mlxsw_sp_rif_ipip_lb_rif(rif); 7747 rif_lb->lb_config = params_lb->lb_config; 7748 } 7749 7750 static int 7751 mlxsw_sp1_rif_ipip_lb_configure(struct mlxsw_sp_rif *rif) 7752 { 7753 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 7754 u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(rif->dev); 7755 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7756 struct mlxsw_sp_vr *ul_vr; 7757 int err; 7758 7759 ul_vr = mlxsw_sp_vr_get(mlxsw_sp, ul_tb_id, NULL); 7760 if (IS_ERR(ul_vr)) 7761 return PTR_ERR(ul_vr); 7762 7763 err = mlxsw_sp_rif_ipip_lb_op(lb_rif, ul_vr->id, 0, true); 7764 if (err) 7765 goto err_loopback_op; 7766 7767 lb_rif->ul_vr_id = ul_vr->id; 7768 lb_rif->ul_rif_id = 0; 7769 ++ul_vr->rif_count; 7770 return 0; 7771 7772 err_loopback_op: 7773 mlxsw_sp_vr_put(mlxsw_sp, ul_vr); 7774 return err; 7775 } 7776 7777 static void mlxsw_sp1_rif_ipip_lb_deconfigure(struct mlxsw_sp_rif *rif) 7778 { 7779 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 7780 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7781 struct mlxsw_sp_vr *ul_vr; 7782 7783 ul_vr = &mlxsw_sp->router->vrs[lb_rif->ul_vr_id]; 7784 mlxsw_sp_rif_ipip_lb_op(lb_rif, ul_vr->id, 0, false); 7785 7786 --ul_vr->rif_count; 7787 mlxsw_sp_vr_put(mlxsw_sp, ul_vr); 7788 } 7789 7790 static const struct mlxsw_sp_rif_ops mlxsw_sp1_rif_ipip_lb_ops = { 7791 .type = MLXSW_SP_RIF_TYPE_IPIP_LB, 7792 .rif_size = sizeof(struct mlxsw_sp_rif_ipip_lb), 7793 .setup = mlxsw_sp_rif_ipip_lb_setup, 7794 .configure = mlxsw_sp1_rif_ipip_lb_configure, 7795 .deconfigure = mlxsw_sp1_rif_ipip_lb_deconfigure, 7796 }; 7797 7798 const struct mlxsw_sp_rif_ops *mlxsw_sp1_rif_ops_arr[] = { 7799 [MLXSW_SP_RIF_TYPE_SUBPORT] = &mlxsw_sp_rif_subport_ops, 7800 [MLXSW_SP_RIF_TYPE_VLAN] = &mlxsw_sp_rif_vlan_emu_ops, 7801 [MLXSW_SP_RIF_TYPE_FID] = &mlxsw_sp_rif_fid_ops, 7802 [MLXSW_SP_RIF_TYPE_IPIP_LB] = &mlxsw_sp1_rif_ipip_lb_ops, 7803 }; 7804 7805 static int 7806 mlxsw_sp_rif_ipip_lb_ul_rif_op(struct mlxsw_sp_rif *ul_rif, bool enable) 7807 { 7808 struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp; 7809 char ritr_pl[MLXSW_REG_RITR_LEN]; 7810 7811 mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF, 7812 ul_rif->rif_index, ul_rif->vr_id, IP_MAX_MTU); 7813 mlxsw_reg_ritr_loopback_protocol_set(ritr_pl, 7814 MLXSW_REG_RITR_LOOPBACK_GENERIC); 7815 7816 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7817 } 7818 7819 static struct mlxsw_sp_rif * 7820 mlxsw_sp_ul_rif_create(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr, 7821 struct netlink_ext_ack *extack) 7822 { 7823 struct mlxsw_sp_rif *ul_rif; 7824 u16 rif_index; 7825 int err; 7826 7827 err = mlxsw_sp_rif_index_alloc(mlxsw_sp, &rif_index); 7828 if (err) { 7829 NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported router interfaces"); 7830 return ERR_PTR(err); 7831 } 7832 7833 ul_rif = mlxsw_sp_rif_alloc(sizeof(*ul_rif), rif_index, vr->id, NULL); 7834 if (!ul_rif) 7835 return ERR_PTR(-ENOMEM); 7836 7837 mlxsw_sp->router->rifs[rif_index] = ul_rif; 7838 ul_rif->mlxsw_sp = mlxsw_sp; 7839 err = mlxsw_sp_rif_ipip_lb_ul_rif_op(ul_rif, true); 7840 if (err) 7841 goto ul_rif_op_err; 7842 7843 return ul_rif; 7844 7845 ul_rif_op_err: 7846 mlxsw_sp->router->rifs[rif_index] = NULL; 7847 kfree(ul_rif); 7848 return ERR_PTR(err); 7849 } 7850 7851 static void mlxsw_sp_ul_rif_destroy(struct mlxsw_sp_rif *ul_rif) 7852 { 7853 struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp; 7854 7855 mlxsw_sp_rif_ipip_lb_ul_rif_op(ul_rif, false); 7856 mlxsw_sp->router->rifs[ul_rif->rif_index] = NULL; 7857 kfree(ul_rif); 7858 } 7859 7860 static struct mlxsw_sp_rif * 7861 mlxsw_sp_ul_rif_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, 7862 struct netlink_ext_ack *extack) 7863 { 7864 struct mlxsw_sp_vr *vr; 7865 int err; 7866 7867 vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id, extack); 7868 if (IS_ERR(vr)) 7869 return ERR_CAST(vr); 7870 7871 if (refcount_inc_not_zero(&vr->ul_rif_refcnt)) 7872 return vr->ul_rif; 7873 7874 vr->ul_rif = mlxsw_sp_ul_rif_create(mlxsw_sp, vr, extack); 7875 if (IS_ERR(vr->ul_rif)) { 7876 err = PTR_ERR(vr->ul_rif); 7877 goto err_ul_rif_create; 7878 } 7879 7880 vr->rif_count++; 7881 refcount_set(&vr->ul_rif_refcnt, 1); 7882 7883 return vr->ul_rif; 7884 7885 err_ul_rif_create: 7886 mlxsw_sp_vr_put(mlxsw_sp, vr); 7887 return ERR_PTR(err); 7888 } 7889 7890 static void mlxsw_sp_ul_rif_put(struct mlxsw_sp_rif *ul_rif) 7891 { 7892 struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp; 7893 struct mlxsw_sp_vr *vr; 7894 7895 vr = &mlxsw_sp->router->vrs[ul_rif->vr_id]; 7896 7897 if (!refcount_dec_and_test(&vr->ul_rif_refcnt)) 7898 return; 7899 7900 vr->rif_count--; 7901 mlxsw_sp_ul_rif_destroy(ul_rif); 7902 mlxsw_sp_vr_put(mlxsw_sp, vr); 7903 } 7904 7905 int mlxsw_sp_router_ul_rif_get(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id, 7906 u16 *ul_rif_index) 7907 { 7908 struct mlxsw_sp_rif *ul_rif; 7909 7910 ASSERT_RTNL(); 7911 7912 ul_rif = mlxsw_sp_ul_rif_get(mlxsw_sp, ul_tb_id, NULL); 7913 if (IS_ERR(ul_rif)) 7914 return PTR_ERR(ul_rif); 7915 *ul_rif_index = ul_rif->rif_index; 7916 7917 return 0; 7918 } 7919 7920 void mlxsw_sp_router_ul_rif_put(struct mlxsw_sp *mlxsw_sp, u16 ul_rif_index) 7921 { 7922 struct mlxsw_sp_rif *ul_rif; 7923 7924 ASSERT_RTNL(); 7925 7926 ul_rif = mlxsw_sp->router->rifs[ul_rif_index]; 7927 if (WARN_ON(!ul_rif)) 7928 return; 7929 7930 mlxsw_sp_ul_rif_put(ul_rif); 7931 } 7932 7933 static int 7934 mlxsw_sp2_rif_ipip_lb_configure(struct mlxsw_sp_rif *rif) 7935 { 7936 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 7937 u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(rif->dev); 7938 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7939 struct mlxsw_sp_rif *ul_rif; 7940 int err; 7941 7942 ul_rif = mlxsw_sp_ul_rif_get(mlxsw_sp, ul_tb_id, NULL); 7943 if (IS_ERR(ul_rif)) 7944 return PTR_ERR(ul_rif); 7945 7946 err = mlxsw_sp_rif_ipip_lb_op(lb_rif, 0, ul_rif->rif_index, true); 7947 if (err) 7948 goto err_loopback_op; 7949 7950 lb_rif->ul_vr_id = 0; 7951 lb_rif->ul_rif_id = ul_rif->rif_index; 7952 7953 return 0; 7954 7955 err_loopback_op: 7956 mlxsw_sp_ul_rif_put(ul_rif); 7957 return err; 7958 } 7959 7960 static void mlxsw_sp2_rif_ipip_lb_deconfigure(struct mlxsw_sp_rif *rif) 7961 { 7962 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 7963 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7964 struct mlxsw_sp_rif *ul_rif; 7965 7966 ul_rif = mlxsw_sp_rif_by_index(mlxsw_sp, lb_rif->ul_rif_id); 7967 mlxsw_sp_rif_ipip_lb_op(lb_rif, 0, lb_rif->ul_rif_id, false); 7968 mlxsw_sp_ul_rif_put(ul_rif); 7969 } 7970 7971 static const struct mlxsw_sp_rif_ops mlxsw_sp2_rif_ipip_lb_ops = { 7972 .type = MLXSW_SP_RIF_TYPE_IPIP_LB, 7973 .rif_size = sizeof(struct mlxsw_sp_rif_ipip_lb), 7974 .setup = mlxsw_sp_rif_ipip_lb_setup, 7975 .configure = mlxsw_sp2_rif_ipip_lb_configure, 7976 .deconfigure = mlxsw_sp2_rif_ipip_lb_deconfigure, 7977 }; 7978 7979 const struct mlxsw_sp_rif_ops *mlxsw_sp2_rif_ops_arr[] = { 7980 [MLXSW_SP_RIF_TYPE_SUBPORT] = &mlxsw_sp_rif_subport_ops, 7981 [MLXSW_SP_RIF_TYPE_VLAN] = &mlxsw_sp_rif_vlan_emu_ops, 7982 [MLXSW_SP_RIF_TYPE_FID] = &mlxsw_sp_rif_fid_ops, 7983 [MLXSW_SP_RIF_TYPE_IPIP_LB] = &mlxsw_sp2_rif_ipip_lb_ops, 7984 }; 7985 7986 static int mlxsw_sp_rifs_init(struct mlxsw_sp *mlxsw_sp) 7987 { 7988 u64 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); 7989 7990 mlxsw_sp->router->rifs = kcalloc(max_rifs, 7991 sizeof(struct mlxsw_sp_rif *), 7992 GFP_KERNEL); 7993 if (!mlxsw_sp->router->rifs) 7994 return -ENOMEM; 7995 7996 return 0; 7997 } 7998 7999 static void mlxsw_sp_rifs_fini(struct mlxsw_sp *mlxsw_sp) 8000 { 8001 int i; 8002 8003 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) 8004 WARN_ON_ONCE(mlxsw_sp->router->rifs[i]); 8005 8006 kfree(mlxsw_sp->router->rifs); 8007 } 8008 8009 static int 8010 mlxsw_sp_ipip_config_tigcr(struct mlxsw_sp *mlxsw_sp) 8011 { 8012 char tigcr_pl[MLXSW_REG_TIGCR_LEN]; 8013 8014 mlxsw_reg_tigcr_pack(tigcr_pl, true, 0); 8015 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tigcr), tigcr_pl); 8016 } 8017 8018 static int mlxsw_sp_ipips_init(struct mlxsw_sp *mlxsw_sp) 8019 { 8020 mlxsw_sp->router->ipip_ops_arr = mlxsw_sp_ipip_ops_arr; 8021 INIT_LIST_HEAD(&mlxsw_sp->router->ipip_list); 8022 return mlxsw_sp_ipip_config_tigcr(mlxsw_sp); 8023 } 8024 8025 static void mlxsw_sp_ipips_fini(struct mlxsw_sp *mlxsw_sp) 8026 { 8027 WARN_ON(!list_empty(&mlxsw_sp->router->ipip_list)); 8028 } 8029 8030 static void mlxsw_sp_router_fib_dump_flush(struct notifier_block *nb) 8031 { 8032 struct mlxsw_sp_router *router; 8033 8034 /* Flush pending FIB notifications and then flush the device's 8035 * table before requesting another dump. The FIB notification 8036 * block is unregistered, so no need to take RTNL. 8037 */ 8038 mlxsw_core_flush_owq(); 8039 router = container_of(nb, struct mlxsw_sp_router, fib_nb); 8040 mlxsw_sp_router_fib_flush(router->mlxsw_sp); 8041 } 8042 8043 #ifdef CONFIG_IP_ROUTE_MULTIPATH 8044 static void mlxsw_sp_mp_hash_header_set(char *recr2_pl, int header) 8045 { 8046 mlxsw_reg_recr2_outer_header_enables_set(recr2_pl, header, true); 8047 } 8048 8049 static void mlxsw_sp_mp_hash_field_set(char *recr2_pl, int field) 8050 { 8051 mlxsw_reg_recr2_outer_header_fields_enable_set(recr2_pl, field, true); 8052 } 8053 8054 static void mlxsw_sp_mp4_hash_init(struct mlxsw_sp *mlxsw_sp, char *recr2_pl) 8055 { 8056 struct net *net = mlxsw_sp_net(mlxsw_sp); 8057 bool only_l3 = !net->ipv4.sysctl_fib_multipath_hash_policy; 8058 8059 mlxsw_sp_mp_hash_header_set(recr2_pl, 8060 MLXSW_REG_RECR2_IPV4_EN_NOT_TCP_NOT_UDP); 8061 mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_IPV4_EN_TCP_UDP); 8062 mlxsw_reg_recr2_ipv4_sip_enable(recr2_pl); 8063 mlxsw_reg_recr2_ipv4_dip_enable(recr2_pl); 8064 if (only_l3) 8065 return; 8066 mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_EN_IPV4); 8067 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_IPV4_PROTOCOL); 8068 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_SPORT); 8069 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_DPORT); 8070 } 8071 8072 static void mlxsw_sp_mp6_hash_init(struct mlxsw_sp *mlxsw_sp, char *recr2_pl) 8073 { 8074 bool only_l3 = !ip6_multipath_hash_policy(mlxsw_sp_net(mlxsw_sp)); 8075 8076 mlxsw_sp_mp_hash_header_set(recr2_pl, 8077 MLXSW_REG_RECR2_IPV6_EN_NOT_TCP_NOT_UDP); 8078 mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_IPV6_EN_TCP_UDP); 8079 mlxsw_reg_recr2_ipv6_sip_enable(recr2_pl); 8080 mlxsw_reg_recr2_ipv6_dip_enable(recr2_pl); 8081 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_IPV6_NEXT_HEADER); 8082 if (only_l3) { 8083 mlxsw_sp_mp_hash_field_set(recr2_pl, 8084 MLXSW_REG_RECR2_IPV6_FLOW_LABEL); 8085 } else { 8086 mlxsw_sp_mp_hash_header_set(recr2_pl, 8087 MLXSW_REG_RECR2_TCP_UDP_EN_IPV6); 8088 mlxsw_sp_mp_hash_field_set(recr2_pl, 8089 MLXSW_REG_RECR2_TCP_UDP_SPORT); 8090 mlxsw_sp_mp_hash_field_set(recr2_pl, 8091 MLXSW_REG_RECR2_TCP_UDP_DPORT); 8092 } 8093 } 8094 8095 static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp) 8096 { 8097 char recr2_pl[MLXSW_REG_RECR2_LEN]; 8098 u32 seed; 8099 8100 seed = jhash(mlxsw_sp->base_mac, sizeof(mlxsw_sp->base_mac), 0); 8101 mlxsw_reg_recr2_pack(recr2_pl, seed); 8102 mlxsw_sp_mp4_hash_init(mlxsw_sp, recr2_pl); 8103 mlxsw_sp_mp6_hash_init(mlxsw_sp, recr2_pl); 8104 8105 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(recr2), recr2_pl); 8106 } 8107 #else 8108 static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp) 8109 { 8110 return 0; 8111 } 8112 #endif 8113 8114 static int mlxsw_sp_dscp_init(struct mlxsw_sp *mlxsw_sp) 8115 { 8116 char rdpm_pl[MLXSW_REG_RDPM_LEN]; 8117 unsigned int i; 8118 8119 MLXSW_REG_ZERO(rdpm, rdpm_pl); 8120 8121 /* HW is determining switch priority based on DSCP-bits, but the 8122 * kernel is still doing that based on the ToS. Since there's a 8123 * mismatch in bits we need to make sure to translate the right 8124 * value ToS would observe, skipping the 2 least-significant ECN bits. 8125 */ 8126 for (i = 0; i < MLXSW_REG_RDPM_DSCP_ENTRY_REC_MAX_COUNT; i++) 8127 mlxsw_reg_rdpm_pack(rdpm_pl, i, rt_tos2priority(i << 2)); 8128 8129 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rdpm), rdpm_pl); 8130 } 8131 8132 static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp) 8133 { 8134 struct net *net = mlxsw_sp_net(mlxsw_sp); 8135 bool usp = net->ipv4.sysctl_ip_fwd_update_priority; 8136 char rgcr_pl[MLXSW_REG_RGCR_LEN]; 8137 u64 max_rifs; 8138 int err; 8139 8140 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_RIFS)) 8141 return -EIO; 8142 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); 8143 8144 mlxsw_reg_rgcr_pack(rgcr_pl, true, true); 8145 mlxsw_reg_rgcr_max_router_interfaces_set(rgcr_pl, max_rifs); 8146 mlxsw_reg_rgcr_usp_set(rgcr_pl, usp); 8147 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl); 8148 if (err) 8149 return err; 8150 return 0; 8151 } 8152 8153 static void __mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp) 8154 { 8155 char rgcr_pl[MLXSW_REG_RGCR_LEN]; 8156 8157 mlxsw_reg_rgcr_pack(rgcr_pl, false, false); 8158 mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl); 8159 } 8160 8161 int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp, 8162 struct netlink_ext_ack *extack) 8163 { 8164 struct mlxsw_sp_router *router; 8165 int err; 8166 8167 router = kzalloc(sizeof(*mlxsw_sp->router), GFP_KERNEL); 8168 if (!router) 8169 return -ENOMEM; 8170 mlxsw_sp->router = router; 8171 router->mlxsw_sp = mlxsw_sp; 8172 8173 router->inetaddr_nb.notifier_call = mlxsw_sp_inetaddr_event; 8174 err = register_inetaddr_notifier(&router->inetaddr_nb); 8175 if (err) 8176 goto err_register_inetaddr_notifier; 8177 8178 router->inet6addr_nb.notifier_call = mlxsw_sp_inet6addr_event; 8179 err = register_inet6addr_notifier(&router->inet6addr_nb); 8180 if (err) 8181 goto err_register_inet6addr_notifier; 8182 8183 INIT_LIST_HEAD(&mlxsw_sp->router->nexthop_neighs_list); 8184 err = __mlxsw_sp_router_init(mlxsw_sp); 8185 if (err) 8186 goto err_router_init; 8187 8188 err = mlxsw_sp_rifs_init(mlxsw_sp); 8189 if (err) 8190 goto err_rifs_init; 8191 8192 err = mlxsw_sp_ipips_init(mlxsw_sp); 8193 if (err) 8194 goto err_ipips_init; 8195 8196 err = rhashtable_init(&mlxsw_sp->router->nexthop_ht, 8197 &mlxsw_sp_nexthop_ht_params); 8198 if (err) 8199 goto err_nexthop_ht_init; 8200 8201 err = rhashtable_init(&mlxsw_sp->router->nexthop_group_ht, 8202 &mlxsw_sp_nexthop_group_ht_params); 8203 if (err) 8204 goto err_nexthop_group_ht_init; 8205 8206 INIT_LIST_HEAD(&mlxsw_sp->router->nexthop_list); 8207 err = mlxsw_sp_lpm_init(mlxsw_sp); 8208 if (err) 8209 goto err_lpm_init; 8210 8211 err = mlxsw_sp_mr_init(mlxsw_sp, &mlxsw_sp_mr_tcam_ops); 8212 if (err) 8213 goto err_mr_init; 8214 8215 err = mlxsw_sp_vrs_init(mlxsw_sp); 8216 if (err) 8217 goto err_vrs_init; 8218 8219 err = mlxsw_sp_neigh_init(mlxsw_sp); 8220 if (err) 8221 goto err_neigh_init; 8222 8223 mlxsw_sp->router->netevent_nb.notifier_call = 8224 mlxsw_sp_router_netevent_event; 8225 err = register_netevent_notifier(&mlxsw_sp->router->netevent_nb); 8226 if (err) 8227 goto err_register_netevent_notifier; 8228 8229 err = mlxsw_sp_mp_hash_init(mlxsw_sp); 8230 if (err) 8231 goto err_mp_hash_init; 8232 8233 err = mlxsw_sp_dscp_init(mlxsw_sp); 8234 if (err) 8235 goto err_dscp_init; 8236 8237 mlxsw_sp->router->fib_nb.notifier_call = mlxsw_sp_router_fib_event; 8238 err = register_fib_notifier(mlxsw_sp_net(mlxsw_sp), 8239 &mlxsw_sp->router->fib_nb, 8240 mlxsw_sp_router_fib_dump_flush, extack); 8241 if (err) 8242 goto err_register_fib_notifier; 8243 8244 return 0; 8245 8246 err_register_fib_notifier: 8247 err_dscp_init: 8248 err_mp_hash_init: 8249 unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb); 8250 err_register_netevent_notifier: 8251 mlxsw_sp_neigh_fini(mlxsw_sp); 8252 err_neigh_init: 8253 mlxsw_sp_vrs_fini(mlxsw_sp); 8254 err_vrs_init: 8255 mlxsw_sp_mr_fini(mlxsw_sp); 8256 err_mr_init: 8257 mlxsw_sp_lpm_fini(mlxsw_sp); 8258 err_lpm_init: 8259 rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht); 8260 err_nexthop_group_ht_init: 8261 rhashtable_destroy(&mlxsw_sp->router->nexthop_ht); 8262 err_nexthop_ht_init: 8263 mlxsw_sp_ipips_fini(mlxsw_sp); 8264 err_ipips_init: 8265 mlxsw_sp_rifs_fini(mlxsw_sp); 8266 err_rifs_init: 8267 __mlxsw_sp_router_fini(mlxsw_sp); 8268 err_router_init: 8269 unregister_inet6addr_notifier(&router->inet6addr_nb); 8270 err_register_inet6addr_notifier: 8271 unregister_inetaddr_notifier(&router->inetaddr_nb); 8272 err_register_inetaddr_notifier: 8273 kfree(mlxsw_sp->router); 8274 return err; 8275 } 8276 8277 void mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp) 8278 { 8279 unregister_fib_notifier(mlxsw_sp_net(mlxsw_sp), 8280 &mlxsw_sp->router->fib_nb); 8281 unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb); 8282 mlxsw_sp_neigh_fini(mlxsw_sp); 8283 mlxsw_sp_vrs_fini(mlxsw_sp); 8284 mlxsw_sp_mr_fini(mlxsw_sp); 8285 mlxsw_sp_lpm_fini(mlxsw_sp); 8286 rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht); 8287 rhashtable_destroy(&mlxsw_sp->router->nexthop_ht); 8288 mlxsw_sp_ipips_fini(mlxsw_sp); 8289 mlxsw_sp_rifs_fini(mlxsw_sp); 8290 __mlxsw_sp_router_fini(mlxsw_sp); 8291 unregister_inet6addr_notifier(&mlxsw_sp->router->inet6addr_nb); 8292 unregister_inetaddr_notifier(&mlxsw_sp->router->inetaddr_nb); 8293 kfree(mlxsw_sp->router); 8294 } 8295