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 <linux/mutex.h> 21 #include <net/netevent.h> 22 #include <net/neighbour.h> 23 #include <net/arp.h> 24 #include <net/ip_fib.h> 25 #include <net/ip6_fib.h> 26 #include <net/nexthop.h> 27 #include <net/fib_rules.h> 28 #include <net/ip_tunnels.h> 29 #include <net/l3mdev.h> 30 #include <net/addrconf.h> 31 #include <net/ndisc.h> 32 #include <net/ipv6.h> 33 #include <net/fib_notifier.h> 34 #include <net/switchdev.h> 35 36 #include "spectrum.h" 37 #include "core.h" 38 #include "reg.h" 39 #include "spectrum_cnt.h" 40 #include "spectrum_dpipe.h" 41 #include "spectrum_ipip.h" 42 #include "spectrum_mr.h" 43 #include "spectrum_mr_tcam.h" 44 #include "spectrum_router.h" 45 #include "spectrum_span.h" 46 47 struct mlxsw_sp_fib; 48 struct mlxsw_sp_vr; 49 struct mlxsw_sp_lpm_tree; 50 struct mlxsw_sp_rif_ops; 51 52 struct mlxsw_sp_rif { 53 struct list_head nexthop_list; 54 struct list_head neigh_list; 55 struct net_device *dev; /* NULL for underlay RIF */ 56 struct mlxsw_sp_fid *fid; 57 unsigned char addr[ETH_ALEN]; 58 int mtu; 59 u16 rif_index; 60 u16 vr_id; 61 const struct mlxsw_sp_rif_ops *ops; 62 struct mlxsw_sp *mlxsw_sp; 63 64 unsigned int counter_ingress; 65 bool counter_ingress_valid; 66 unsigned int counter_egress; 67 bool counter_egress_valid; 68 }; 69 70 struct mlxsw_sp_rif_params { 71 struct net_device *dev; 72 union { 73 u16 system_port; 74 u16 lag_id; 75 }; 76 u16 vid; 77 bool lag; 78 }; 79 80 struct mlxsw_sp_rif_subport { 81 struct mlxsw_sp_rif common; 82 refcount_t ref_count; 83 union { 84 u16 system_port; 85 u16 lag_id; 86 }; 87 u16 vid; 88 bool lag; 89 }; 90 91 struct mlxsw_sp_rif_ipip_lb { 92 struct mlxsw_sp_rif common; 93 struct mlxsw_sp_rif_ipip_lb_config lb_config; 94 u16 ul_vr_id; /* Reserved for Spectrum-2. */ 95 u16 ul_rif_id; /* Reserved for Spectrum. */ 96 }; 97 98 struct mlxsw_sp_rif_params_ipip_lb { 99 struct mlxsw_sp_rif_params common; 100 struct mlxsw_sp_rif_ipip_lb_config lb_config; 101 }; 102 103 struct mlxsw_sp_rif_ops { 104 enum mlxsw_sp_rif_type type; 105 size_t rif_size; 106 107 void (*setup)(struct mlxsw_sp_rif *rif, 108 const struct mlxsw_sp_rif_params *params); 109 int (*configure)(struct mlxsw_sp_rif *rif); 110 void (*deconfigure)(struct mlxsw_sp_rif *rif); 111 struct mlxsw_sp_fid * (*fid_get)(struct mlxsw_sp_rif *rif, 112 struct netlink_ext_ack *extack); 113 void (*fdb_del)(struct mlxsw_sp_rif *rif, const char *mac); 114 }; 115 116 static struct mlxsw_sp_rif * 117 mlxsw_sp_rif_find_by_dev(const struct mlxsw_sp *mlxsw_sp, 118 const struct net_device *dev); 119 static void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif); 120 static void mlxsw_sp_lpm_tree_hold(struct mlxsw_sp_lpm_tree *lpm_tree); 121 static void mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp, 122 struct mlxsw_sp_lpm_tree *lpm_tree); 123 static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp, 124 const struct mlxsw_sp_fib *fib, 125 u8 tree_id); 126 static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp, 127 const struct mlxsw_sp_fib *fib); 128 129 static unsigned int * 130 mlxsw_sp_rif_p_counter_get(struct mlxsw_sp_rif *rif, 131 enum mlxsw_sp_rif_counter_dir dir) 132 { 133 switch (dir) { 134 case MLXSW_SP_RIF_COUNTER_EGRESS: 135 return &rif->counter_egress; 136 case MLXSW_SP_RIF_COUNTER_INGRESS: 137 return &rif->counter_ingress; 138 } 139 return NULL; 140 } 141 142 static bool 143 mlxsw_sp_rif_counter_valid_get(struct mlxsw_sp_rif *rif, 144 enum mlxsw_sp_rif_counter_dir dir) 145 { 146 switch (dir) { 147 case MLXSW_SP_RIF_COUNTER_EGRESS: 148 return rif->counter_egress_valid; 149 case MLXSW_SP_RIF_COUNTER_INGRESS: 150 return rif->counter_ingress_valid; 151 } 152 return false; 153 } 154 155 static void 156 mlxsw_sp_rif_counter_valid_set(struct mlxsw_sp_rif *rif, 157 enum mlxsw_sp_rif_counter_dir dir, 158 bool valid) 159 { 160 switch (dir) { 161 case MLXSW_SP_RIF_COUNTER_EGRESS: 162 rif->counter_egress_valid = valid; 163 break; 164 case MLXSW_SP_RIF_COUNTER_INGRESS: 165 rif->counter_ingress_valid = valid; 166 break; 167 } 168 } 169 170 static int mlxsw_sp_rif_counter_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index, 171 unsigned int counter_index, bool enable, 172 enum mlxsw_sp_rif_counter_dir dir) 173 { 174 char ritr_pl[MLXSW_REG_RITR_LEN]; 175 bool is_egress = false; 176 int err; 177 178 if (dir == MLXSW_SP_RIF_COUNTER_EGRESS) 179 is_egress = true; 180 mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index); 181 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 182 if (err) 183 return err; 184 185 mlxsw_reg_ritr_counter_pack(ritr_pl, counter_index, enable, 186 is_egress); 187 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 188 } 189 190 int mlxsw_sp_rif_counter_value_get(struct mlxsw_sp *mlxsw_sp, 191 struct mlxsw_sp_rif *rif, 192 enum mlxsw_sp_rif_counter_dir dir, u64 *cnt) 193 { 194 char ricnt_pl[MLXSW_REG_RICNT_LEN]; 195 unsigned int *p_counter_index; 196 bool valid; 197 int err; 198 199 valid = mlxsw_sp_rif_counter_valid_get(rif, dir); 200 if (!valid) 201 return -EINVAL; 202 203 p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); 204 if (!p_counter_index) 205 return -EINVAL; 206 mlxsw_reg_ricnt_pack(ricnt_pl, *p_counter_index, 207 MLXSW_REG_RICNT_OPCODE_NOP); 208 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl); 209 if (err) 210 return err; 211 *cnt = mlxsw_reg_ricnt_good_unicast_packets_get(ricnt_pl); 212 return 0; 213 } 214 215 static int mlxsw_sp_rif_counter_clear(struct mlxsw_sp *mlxsw_sp, 216 unsigned int counter_index) 217 { 218 char ricnt_pl[MLXSW_REG_RICNT_LEN]; 219 220 mlxsw_reg_ricnt_pack(ricnt_pl, counter_index, 221 MLXSW_REG_RICNT_OPCODE_CLEAR); 222 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl); 223 } 224 225 int mlxsw_sp_rif_counter_alloc(struct mlxsw_sp *mlxsw_sp, 226 struct mlxsw_sp_rif *rif, 227 enum mlxsw_sp_rif_counter_dir dir) 228 { 229 unsigned int *p_counter_index; 230 int err; 231 232 p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); 233 if (!p_counter_index) 234 return -EINVAL; 235 err = mlxsw_sp_counter_alloc(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF, 236 p_counter_index); 237 if (err) 238 return err; 239 240 err = mlxsw_sp_rif_counter_clear(mlxsw_sp, *p_counter_index); 241 if (err) 242 goto err_counter_clear; 243 244 err = mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index, 245 *p_counter_index, true, dir); 246 if (err) 247 goto err_counter_edit; 248 mlxsw_sp_rif_counter_valid_set(rif, dir, true); 249 return 0; 250 251 err_counter_edit: 252 err_counter_clear: 253 mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF, 254 *p_counter_index); 255 return err; 256 } 257 258 void mlxsw_sp_rif_counter_free(struct mlxsw_sp *mlxsw_sp, 259 struct mlxsw_sp_rif *rif, 260 enum mlxsw_sp_rif_counter_dir dir) 261 { 262 unsigned int *p_counter_index; 263 264 if (!mlxsw_sp_rif_counter_valid_get(rif, dir)) 265 return; 266 267 p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); 268 if (WARN_ON(!p_counter_index)) 269 return; 270 mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index, 271 *p_counter_index, false, dir); 272 mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF, 273 *p_counter_index); 274 mlxsw_sp_rif_counter_valid_set(rif, dir, false); 275 } 276 277 static void mlxsw_sp_rif_counters_alloc(struct mlxsw_sp_rif *rif) 278 { 279 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 280 struct devlink *devlink; 281 282 devlink = priv_to_devlink(mlxsw_sp->core); 283 if (!devlink_dpipe_table_counter_enabled(devlink, 284 MLXSW_SP_DPIPE_TABLE_NAME_ERIF)) 285 return; 286 mlxsw_sp_rif_counter_alloc(mlxsw_sp, rif, MLXSW_SP_RIF_COUNTER_EGRESS); 287 } 288 289 static void mlxsw_sp_rif_counters_free(struct mlxsw_sp_rif *rif) 290 { 291 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 292 293 mlxsw_sp_rif_counter_free(mlxsw_sp, rif, MLXSW_SP_RIF_COUNTER_EGRESS); 294 } 295 296 #define MLXSW_SP_PREFIX_COUNT (sizeof(struct in6_addr) * BITS_PER_BYTE + 1) 297 298 struct mlxsw_sp_prefix_usage { 299 DECLARE_BITMAP(b, MLXSW_SP_PREFIX_COUNT); 300 }; 301 302 #define mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) \ 303 for_each_set_bit(prefix, (prefix_usage)->b, MLXSW_SP_PREFIX_COUNT) 304 305 static bool 306 mlxsw_sp_prefix_usage_eq(struct mlxsw_sp_prefix_usage *prefix_usage1, 307 struct mlxsw_sp_prefix_usage *prefix_usage2) 308 { 309 return !memcmp(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1)); 310 } 311 312 static void 313 mlxsw_sp_prefix_usage_cpy(struct mlxsw_sp_prefix_usage *prefix_usage1, 314 struct mlxsw_sp_prefix_usage *prefix_usage2) 315 { 316 memcpy(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1)); 317 } 318 319 static void 320 mlxsw_sp_prefix_usage_set(struct mlxsw_sp_prefix_usage *prefix_usage, 321 unsigned char prefix_len) 322 { 323 set_bit(prefix_len, prefix_usage->b); 324 } 325 326 static void 327 mlxsw_sp_prefix_usage_clear(struct mlxsw_sp_prefix_usage *prefix_usage, 328 unsigned char prefix_len) 329 { 330 clear_bit(prefix_len, prefix_usage->b); 331 } 332 333 struct mlxsw_sp_fib_key { 334 unsigned char addr[sizeof(struct in6_addr)]; 335 unsigned char prefix_len; 336 }; 337 338 enum mlxsw_sp_fib_entry_type { 339 MLXSW_SP_FIB_ENTRY_TYPE_REMOTE, 340 MLXSW_SP_FIB_ENTRY_TYPE_LOCAL, 341 MLXSW_SP_FIB_ENTRY_TYPE_TRAP, 342 MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE, 343 MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE, 344 345 /* This is a special case of local delivery, where a packet should be 346 * decapsulated on reception. Note that there is no corresponding ENCAP, 347 * because that's a type of next hop, not of FIB entry. (There can be 348 * several next hops in a REMOTE entry, and some of them may be 349 * encapsulating entries.) 350 */ 351 MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP, 352 MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP, 353 }; 354 355 struct mlxsw_sp_nexthop_group; 356 struct mlxsw_sp_fib_entry; 357 358 struct mlxsw_sp_fib_node { 359 struct mlxsw_sp_fib_entry *fib_entry; 360 struct list_head list; 361 struct rhash_head ht_node; 362 struct mlxsw_sp_fib *fib; 363 struct mlxsw_sp_fib_key key; 364 }; 365 366 struct mlxsw_sp_fib_entry_decap { 367 struct mlxsw_sp_ipip_entry *ipip_entry; 368 u32 tunnel_index; 369 }; 370 371 struct mlxsw_sp_fib_entry { 372 struct mlxsw_sp_fib_node *fib_node; 373 enum mlxsw_sp_fib_entry_type type; 374 struct list_head nexthop_group_node; 375 struct mlxsw_sp_nexthop_group *nh_group; 376 struct mlxsw_sp_fib_entry_decap decap; /* Valid for decap entries. */ 377 }; 378 379 struct mlxsw_sp_fib4_entry { 380 struct mlxsw_sp_fib_entry common; 381 u32 tb_id; 382 u32 prio; 383 u8 tos; 384 u8 type; 385 }; 386 387 struct mlxsw_sp_fib6_entry { 388 struct mlxsw_sp_fib_entry common; 389 struct list_head rt6_list; 390 unsigned int nrt6; 391 }; 392 393 struct mlxsw_sp_rt6 { 394 struct list_head list; 395 struct fib6_info *rt; 396 }; 397 398 struct mlxsw_sp_lpm_tree { 399 u8 id; /* tree ID */ 400 unsigned int ref_count; 401 enum mlxsw_sp_l3proto proto; 402 unsigned long prefix_ref_count[MLXSW_SP_PREFIX_COUNT]; 403 struct mlxsw_sp_prefix_usage prefix_usage; 404 }; 405 406 struct mlxsw_sp_fib { 407 struct rhashtable ht; 408 struct list_head node_list; 409 struct mlxsw_sp_vr *vr; 410 struct mlxsw_sp_lpm_tree *lpm_tree; 411 enum mlxsw_sp_l3proto proto; 412 }; 413 414 struct mlxsw_sp_vr { 415 u16 id; /* virtual router ID */ 416 u32 tb_id; /* kernel fib table id */ 417 unsigned int rif_count; 418 struct mlxsw_sp_fib *fib4; 419 struct mlxsw_sp_fib *fib6; 420 struct mlxsw_sp_mr_table *mr_table[MLXSW_SP_L3_PROTO_MAX]; 421 struct mlxsw_sp_rif *ul_rif; 422 refcount_t ul_rif_refcnt; 423 }; 424 425 static const struct rhashtable_params mlxsw_sp_fib_ht_params; 426 427 static struct mlxsw_sp_fib *mlxsw_sp_fib_create(struct mlxsw_sp *mlxsw_sp, 428 struct mlxsw_sp_vr *vr, 429 enum mlxsw_sp_l3proto proto) 430 { 431 struct mlxsw_sp_lpm_tree *lpm_tree; 432 struct mlxsw_sp_fib *fib; 433 int err; 434 435 lpm_tree = mlxsw_sp->router->lpm.proto_trees[proto]; 436 fib = kzalloc(sizeof(*fib), GFP_KERNEL); 437 if (!fib) 438 return ERR_PTR(-ENOMEM); 439 err = rhashtable_init(&fib->ht, &mlxsw_sp_fib_ht_params); 440 if (err) 441 goto err_rhashtable_init; 442 INIT_LIST_HEAD(&fib->node_list); 443 fib->proto = proto; 444 fib->vr = vr; 445 fib->lpm_tree = lpm_tree; 446 mlxsw_sp_lpm_tree_hold(lpm_tree); 447 err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib, lpm_tree->id); 448 if (err) 449 goto err_lpm_tree_bind; 450 return fib; 451 452 err_lpm_tree_bind: 453 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 454 err_rhashtable_init: 455 kfree(fib); 456 return ERR_PTR(err); 457 } 458 459 static void mlxsw_sp_fib_destroy(struct mlxsw_sp *mlxsw_sp, 460 struct mlxsw_sp_fib *fib) 461 { 462 mlxsw_sp_vr_lpm_tree_unbind(mlxsw_sp, fib); 463 mlxsw_sp_lpm_tree_put(mlxsw_sp, fib->lpm_tree); 464 WARN_ON(!list_empty(&fib->node_list)); 465 rhashtable_destroy(&fib->ht); 466 kfree(fib); 467 } 468 469 static struct mlxsw_sp_lpm_tree * 470 mlxsw_sp_lpm_tree_find_unused(struct mlxsw_sp *mlxsw_sp) 471 { 472 static struct mlxsw_sp_lpm_tree *lpm_tree; 473 int i; 474 475 for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) { 476 lpm_tree = &mlxsw_sp->router->lpm.trees[i]; 477 if (lpm_tree->ref_count == 0) 478 return lpm_tree; 479 } 480 return NULL; 481 } 482 483 static int mlxsw_sp_lpm_tree_alloc(struct mlxsw_sp *mlxsw_sp, 484 struct mlxsw_sp_lpm_tree *lpm_tree) 485 { 486 char ralta_pl[MLXSW_REG_RALTA_LEN]; 487 488 mlxsw_reg_ralta_pack(ralta_pl, true, 489 (enum mlxsw_reg_ralxx_protocol) lpm_tree->proto, 490 lpm_tree->id); 491 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); 492 } 493 494 static void mlxsw_sp_lpm_tree_free(struct mlxsw_sp *mlxsw_sp, 495 struct mlxsw_sp_lpm_tree *lpm_tree) 496 { 497 char ralta_pl[MLXSW_REG_RALTA_LEN]; 498 499 mlxsw_reg_ralta_pack(ralta_pl, false, 500 (enum mlxsw_reg_ralxx_protocol) lpm_tree->proto, 501 lpm_tree->id); 502 mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); 503 } 504 505 static int 506 mlxsw_sp_lpm_tree_left_struct_set(struct mlxsw_sp *mlxsw_sp, 507 struct mlxsw_sp_prefix_usage *prefix_usage, 508 struct mlxsw_sp_lpm_tree *lpm_tree) 509 { 510 char ralst_pl[MLXSW_REG_RALST_LEN]; 511 u8 root_bin = 0; 512 u8 prefix; 513 u8 last_prefix = MLXSW_REG_RALST_BIN_NO_CHILD; 514 515 mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) 516 root_bin = prefix; 517 518 mlxsw_reg_ralst_pack(ralst_pl, root_bin, lpm_tree->id); 519 mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) { 520 if (prefix == 0) 521 continue; 522 mlxsw_reg_ralst_bin_pack(ralst_pl, prefix, last_prefix, 523 MLXSW_REG_RALST_BIN_NO_CHILD); 524 last_prefix = prefix; 525 } 526 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl); 527 } 528 529 static struct mlxsw_sp_lpm_tree * 530 mlxsw_sp_lpm_tree_create(struct mlxsw_sp *mlxsw_sp, 531 struct mlxsw_sp_prefix_usage *prefix_usage, 532 enum mlxsw_sp_l3proto proto) 533 { 534 struct mlxsw_sp_lpm_tree *lpm_tree; 535 int err; 536 537 lpm_tree = mlxsw_sp_lpm_tree_find_unused(mlxsw_sp); 538 if (!lpm_tree) 539 return ERR_PTR(-EBUSY); 540 lpm_tree->proto = proto; 541 err = mlxsw_sp_lpm_tree_alloc(mlxsw_sp, lpm_tree); 542 if (err) 543 return ERR_PTR(err); 544 545 err = mlxsw_sp_lpm_tree_left_struct_set(mlxsw_sp, prefix_usage, 546 lpm_tree); 547 if (err) 548 goto err_left_struct_set; 549 memcpy(&lpm_tree->prefix_usage, prefix_usage, 550 sizeof(lpm_tree->prefix_usage)); 551 memset(&lpm_tree->prefix_ref_count, 0, 552 sizeof(lpm_tree->prefix_ref_count)); 553 lpm_tree->ref_count = 1; 554 return lpm_tree; 555 556 err_left_struct_set: 557 mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree); 558 return ERR_PTR(err); 559 } 560 561 static void mlxsw_sp_lpm_tree_destroy(struct mlxsw_sp *mlxsw_sp, 562 struct mlxsw_sp_lpm_tree *lpm_tree) 563 { 564 mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree); 565 } 566 567 static struct mlxsw_sp_lpm_tree * 568 mlxsw_sp_lpm_tree_get(struct mlxsw_sp *mlxsw_sp, 569 struct mlxsw_sp_prefix_usage *prefix_usage, 570 enum mlxsw_sp_l3proto proto) 571 { 572 struct mlxsw_sp_lpm_tree *lpm_tree; 573 int i; 574 575 for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) { 576 lpm_tree = &mlxsw_sp->router->lpm.trees[i]; 577 if (lpm_tree->ref_count != 0 && 578 lpm_tree->proto == proto && 579 mlxsw_sp_prefix_usage_eq(&lpm_tree->prefix_usage, 580 prefix_usage)) { 581 mlxsw_sp_lpm_tree_hold(lpm_tree); 582 return lpm_tree; 583 } 584 } 585 return mlxsw_sp_lpm_tree_create(mlxsw_sp, prefix_usage, proto); 586 } 587 588 static void mlxsw_sp_lpm_tree_hold(struct mlxsw_sp_lpm_tree *lpm_tree) 589 { 590 lpm_tree->ref_count++; 591 } 592 593 static void mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp, 594 struct mlxsw_sp_lpm_tree *lpm_tree) 595 { 596 if (--lpm_tree->ref_count == 0) 597 mlxsw_sp_lpm_tree_destroy(mlxsw_sp, lpm_tree); 598 } 599 600 #define MLXSW_SP_LPM_TREE_MIN 1 /* tree 0 is reserved */ 601 602 static int mlxsw_sp_lpm_init(struct mlxsw_sp *mlxsw_sp) 603 { 604 struct mlxsw_sp_prefix_usage req_prefix_usage = {{ 0 } }; 605 struct mlxsw_sp_lpm_tree *lpm_tree; 606 u64 max_trees; 607 int err, i; 608 609 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_LPM_TREES)) 610 return -EIO; 611 612 max_trees = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_LPM_TREES); 613 mlxsw_sp->router->lpm.tree_count = max_trees - MLXSW_SP_LPM_TREE_MIN; 614 mlxsw_sp->router->lpm.trees = kcalloc(mlxsw_sp->router->lpm.tree_count, 615 sizeof(struct mlxsw_sp_lpm_tree), 616 GFP_KERNEL); 617 if (!mlxsw_sp->router->lpm.trees) 618 return -ENOMEM; 619 620 for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) { 621 lpm_tree = &mlxsw_sp->router->lpm.trees[i]; 622 lpm_tree->id = i + MLXSW_SP_LPM_TREE_MIN; 623 } 624 625 lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, 626 MLXSW_SP_L3_PROTO_IPV4); 627 if (IS_ERR(lpm_tree)) { 628 err = PTR_ERR(lpm_tree); 629 goto err_ipv4_tree_get; 630 } 631 mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4] = lpm_tree; 632 633 lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, 634 MLXSW_SP_L3_PROTO_IPV6); 635 if (IS_ERR(lpm_tree)) { 636 err = PTR_ERR(lpm_tree); 637 goto err_ipv6_tree_get; 638 } 639 mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV6] = lpm_tree; 640 641 return 0; 642 643 err_ipv6_tree_get: 644 lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4]; 645 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 646 err_ipv4_tree_get: 647 kfree(mlxsw_sp->router->lpm.trees); 648 return err; 649 } 650 651 static void mlxsw_sp_lpm_fini(struct mlxsw_sp *mlxsw_sp) 652 { 653 struct mlxsw_sp_lpm_tree *lpm_tree; 654 655 lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV6]; 656 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 657 658 lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4]; 659 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 660 661 kfree(mlxsw_sp->router->lpm.trees); 662 } 663 664 static bool mlxsw_sp_vr_is_used(const struct mlxsw_sp_vr *vr) 665 { 666 return !!vr->fib4 || !!vr->fib6 || 667 !!vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] || 668 !!vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]; 669 } 670 671 static struct mlxsw_sp_vr *mlxsw_sp_vr_find_unused(struct mlxsw_sp *mlxsw_sp) 672 { 673 struct mlxsw_sp_vr *vr; 674 int i; 675 676 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 677 vr = &mlxsw_sp->router->vrs[i]; 678 if (!mlxsw_sp_vr_is_used(vr)) 679 return vr; 680 } 681 return NULL; 682 } 683 684 static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp, 685 const struct mlxsw_sp_fib *fib, u8 tree_id) 686 { 687 char raltb_pl[MLXSW_REG_RALTB_LEN]; 688 689 mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id, 690 (enum mlxsw_reg_ralxx_protocol) fib->proto, 691 tree_id); 692 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl); 693 } 694 695 static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp, 696 const struct mlxsw_sp_fib *fib) 697 { 698 char raltb_pl[MLXSW_REG_RALTB_LEN]; 699 700 /* Bind to tree 0 which is default */ 701 mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id, 702 (enum mlxsw_reg_ralxx_protocol) fib->proto, 0); 703 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl); 704 } 705 706 static u32 mlxsw_sp_fix_tb_id(u32 tb_id) 707 { 708 /* For our purpose, squash main, default and local tables into one */ 709 if (tb_id == RT_TABLE_LOCAL || tb_id == RT_TABLE_DEFAULT) 710 tb_id = RT_TABLE_MAIN; 711 return tb_id; 712 } 713 714 static struct mlxsw_sp_vr *mlxsw_sp_vr_find(struct mlxsw_sp *mlxsw_sp, 715 u32 tb_id) 716 { 717 struct mlxsw_sp_vr *vr; 718 int i; 719 720 tb_id = mlxsw_sp_fix_tb_id(tb_id); 721 722 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 723 vr = &mlxsw_sp->router->vrs[i]; 724 if (mlxsw_sp_vr_is_used(vr) && vr->tb_id == tb_id) 725 return vr; 726 } 727 return NULL; 728 } 729 730 int mlxsw_sp_router_tb_id_vr_id(struct mlxsw_sp *mlxsw_sp, u32 tb_id, 731 u16 *vr_id) 732 { 733 struct mlxsw_sp_vr *vr; 734 int err = 0; 735 736 mutex_lock(&mlxsw_sp->router->lock); 737 vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id); 738 if (!vr) { 739 err = -ESRCH; 740 goto out; 741 } 742 *vr_id = vr->id; 743 out: 744 mutex_unlock(&mlxsw_sp->router->lock); 745 return err; 746 } 747 748 static struct mlxsw_sp_fib *mlxsw_sp_vr_fib(const struct mlxsw_sp_vr *vr, 749 enum mlxsw_sp_l3proto proto) 750 { 751 switch (proto) { 752 case MLXSW_SP_L3_PROTO_IPV4: 753 return vr->fib4; 754 case MLXSW_SP_L3_PROTO_IPV6: 755 return vr->fib6; 756 } 757 return NULL; 758 } 759 760 static struct mlxsw_sp_vr *mlxsw_sp_vr_create(struct mlxsw_sp *mlxsw_sp, 761 u32 tb_id, 762 struct netlink_ext_ack *extack) 763 { 764 struct mlxsw_sp_mr_table *mr4_table, *mr6_table; 765 struct mlxsw_sp_fib *fib4; 766 struct mlxsw_sp_fib *fib6; 767 struct mlxsw_sp_vr *vr; 768 int err; 769 770 vr = mlxsw_sp_vr_find_unused(mlxsw_sp); 771 if (!vr) { 772 NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported virtual routers"); 773 return ERR_PTR(-EBUSY); 774 } 775 fib4 = mlxsw_sp_fib_create(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV4); 776 if (IS_ERR(fib4)) 777 return ERR_CAST(fib4); 778 fib6 = mlxsw_sp_fib_create(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV6); 779 if (IS_ERR(fib6)) { 780 err = PTR_ERR(fib6); 781 goto err_fib6_create; 782 } 783 mr4_table = mlxsw_sp_mr_table_create(mlxsw_sp, vr->id, 784 MLXSW_SP_L3_PROTO_IPV4); 785 if (IS_ERR(mr4_table)) { 786 err = PTR_ERR(mr4_table); 787 goto err_mr4_table_create; 788 } 789 mr6_table = mlxsw_sp_mr_table_create(mlxsw_sp, vr->id, 790 MLXSW_SP_L3_PROTO_IPV6); 791 if (IS_ERR(mr6_table)) { 792 err = PTR_ERR(mr6_table); 793 goto err_mr6_table_create; 794 } 795 796 vr->fib4 = fib4; 797 vr->fib6 = fib6; 798 vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] = mr4_table; 799 vr->mr_table[MLXSW_SP_L3_PROTO_IPV6] = mr6_table; 800 vr->tb_id = tb_id; 801 return vr; 802 803 err_mr6_table_create: 804 mlxsw_sp_mr_table_destroy(mr4_table); 805 err_mr4_table_create: 806 mlxsw_sp_fib_destroy(mlxsw_sp, fib6); 807 err_fib6_create: 808 mlxsw_sp_fib_destroy(mlxsw_sp, fib4); 809 return ERR_PTR(err); 810 } 811 812 static void mlxsw_sp_vr_destroy(struct mlxsw_sp *mlxsw_sp, 813 struct mlxsw_sp_vr *vr) 814 { 815 mlxsw_sp_mr_table_destroy(vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]); 816 vr->mr_table[MLXSW_SP_L3_PROTO_IPV6] = NULL; 817 mlxsw_sp_mr_table_destroy(vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]); 818 vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] = NULL; 819 mlxsw_sp_fib_destroy(mlxsw_sp, vr->fib6); 820 vr->fib6 = NULL; 821 mlxsw_sp_fib_destroy(mlxsw_sp, vr->fib4); 822 vr->fib4 = NULL; 823 } 824 825 static struct mlxsw_sp_vr *mlxsw_sp_vr_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, 826 struct netlink_ext_ack *extack) 827 { 828 struct mlxsw_sp_vr *vr; 829 830 tb_id = mlxsw_sp_fix_tb_id(tb_id); 831 vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id); 832 if (!vr) 833 vr = mlxsw_sp_vr_create(mlxsw_sp, tb_id, extack); 834 return vr; 835 } 836 837 static void mlxsw_sp_vr_put(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr) 838 { 839 if (!vr->rif_count && list_empty(&vr->fib4->node_list) && 840 list_empty(&vr->fib6->node_list) && 841 mlxsw_sp_mr_table_empty(vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]) && 842 mlxsw_sp_mr_table_empty(vr->mr_table[MLXSW_SP_L3_PROTO_IPV6])) 843 mlxsw_sp_vr_destroy(mlxsw_sp, vr); 844 } 845 846 static bool 847 mlxsw_sp_vr_lpm_tree_should_replace(struct mlxsw_sp_vr *vr, 848 enum mlxsw_sp_l3proto proto, u8 tree_id) 849 { 850 struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto); 851 852 if (!mlxsw_sp_vr_is_used(vr)) 853 return false; 854 if (fib->lpm_tree->id == tree_id) 855 return true; 856 return false; 857 } 858 859 static int mlxsw_sp_vr_lpm_tree_replace(struct mlxsw_sp *mlxsw_sp, 860 struct mlxsw_sp_fib *fib, 861 struct mlxsw_sp_lpm_tree *new_tree) 862 { 863 struct mlxsw_sp_lpm_tree *old_tree = fib->lpm_tree; 864 int err; 865 866 fib->lpm_tree = new_tree; 867 mlxsw_sp_lpm_tree_hold(new_tree); 868 err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib, new_tree->id); 869 if (err) 870 goto err_tree_bind; 871 mlxsw_sp_lpm_tree_put(mlxsw_sp, old_tree); 872 return 0; 873 874 err_tree_bind: 875 mlxsw_sp_lpm_tree_put(mlxsw_sp, new_tree); 876 fib->lpm_tree = old_tree; 877 return err; 878 } 879 880 static int mlxsw_sp_vrs_lpm_tree_replace(struct mlxsw_sp *mlxsw_sp, 881 struct mlxsw_sp_fib *fib, 882 struct mlxsw_sp_lpm_tree *new_tree) 883 { 884 enum mlxsw_sp_l3proto proto = fib->proto; 885 struct mlxsw_sp_lpm_tree *old_tree; 886 u8 old_id, new_id = new_tree->id; 887 struct mlxsw_sp_vr *vr; 888 int i, err; 889 890 old_tree = mlxsw_sp->router->lpm.proto_trees[proto]; 891 old_id = old_tree->id; 892 893 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 894 vr = &mlxsw_sp->router->vrs[i]; 895 if (!mlxsw_sp_vr_lpm_tree_should_replace(vr, proto, old_id)) 896 continue; 897 err = mlxsw_sp_vr_lpm_tree_replace(mlxsw_sp, 898 mlxsw_sp_vr_fib(vr, proto), 899 new_tree); 900 if (err) 901 goto err_tree_replace; 902 } 903 904 memcpy(new_tree->prefix_ref_count, old_tree->prefix_ref_count, 905 sizeof(new_tree->prefix_ref_count)); 906 mlxsw_sp->router->lpm.proto_trees[proto] = new_tree; 907 mlxsw_sp_lpm_tree_put(mlxsw_sp, old_tree); 908 909 return 0; 910 911 err_tree_replace: 912 for (i--; i >= 0; i--) { 913 if (!mlxsw_sp_vr_lpm_tree_should_replace(vr, proto, new_id)) 914 continue; 915 mlxsw_sp_vr_lpm_tree_replace(mlxsw_sp, 916 mlxsw_sp_vr_fib(vr, proto), 917 old_tree); 918 } 919 return err; 920 } 921 922 static int mlxsw_sp_vrs_init(struct mlxsw_sp *mlxsw_sp) 923 { 924 struct mlxsw_sp_vr *vr; 925 u64 max_vrs; 926 int i; 927 928 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_VRS)) 929 return -EIO; 930 931 max_vrs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); 932 mlxsw_sp->router->vrs = kcalloc(max_vrs, sizeof(struct mlxsw_sp_vr), 933 GFP_KERNEL); 934 if (!mlxsw_sp->router->vrs) 935 return -ENOMEM; 936 937 for (i = 0; i < max_vrs; i++) { 938 vr = &mlxsw_sp->router->vrs[i]; 939 vr->id = i; 940 } 941 942 return 0; 943 } 944 945 static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp); 946 947 static void mlxsw_sp_vrs_fini(struct mlxsw_sp *mlxsw_sp) 948 { 949 /* At this stage we're guaranteed not to have new incoming 950 * FIB notifications and the work queue is free from FIBs 951 * sitting on top of mlxsw netdevs. However, we can still 952 * have other FIBs queued. Flush the queue before flushing 953 * the device's tables. No need for locks, as we're the only 954 * writer. 955 */ 956 mlxsw_core_flush_owq(); 957 mlxsw_sp_router_fib_flush(mlxsw_sp); 958 kfree(mlxsw_sp->router->vrs); 959 } 960 961 static struct net_device * 962 __mlxsw_sp_ipip_netdev_ul_dev_get(const struct net_device *ol_dev) 963 { 964 struct ip_tunnel *tun = netdev_priv(ol_dev); 965 struct net *net = dev_net(ol_dev); 966 967 return dev_get_by_index_rcu(net, tun->parms.link); 968 } 969 970 u32 mlxsw_sp_ipip_dev_ul_tb_id(const struct net_device *ol_dev) 971 { 972 struct net_device *d; 973 u32 tb_id; 974 975 rcu_read_lock(); 976 d = __mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev); 977 if (d) 978 tb_id = l3mdev_fib_table(d) ? : RT_TABLE_MAIN; 979 else 980 tb_id = RT_TABLE_MAIN; 981 rcu_read_unlock(); 982 983 return tb_id; 984 } 985 986 static struct mlxsw_sp_rif * 987 mlxsw_sp_rif_create(struct mlxsw_sp *mlxsw_sp, 988 const struct mlxsw_sp_rif_params *params, 989 struct netlink_ext_ack *extack); 990 991 static struct mlxsw_sp_rif_ipip_lb * 992 mlxsw_sp_ipip_ol_ipip_lb_create(struct mlxsw_sp *mlxsw_sp, 993 enum mlxsw_sp_ipip_type ipipt, 994 struct net_device *ol_dev, 995 struct netlink_ext_ack *extack) 996 { 997 struct mlxsw_sp_rif_params_ipip_lb lb_params; 998 const struct mlxsw_sp_ipip_ops *ipip_ops; 999 struct mlxsw_sp_rif *rif; 1000 1001 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipipt]; 1002 lb_params = (struct mlxsw_sp_rif_params_ipip_lb) { 1003 .common.dev = ol_dev, 1004 .common.lag = false, 1005 .lb_config = ipip_ops->ol_loopback_config(mlxsw_sp, ol_dev), 1006 }; 1007 1008 rif = mlxsw_sp_rif_create(mlxsw_sp, &lb_params.common, extack); 1009 if (IS_ERR(rif)) 1010 return ERR_CAST(rif); 1011 return container_of(rif, struct mlxsw_sp_rif_ipip_lb, common); 1012 } 1013 1014 static struct mlxsw_sp_ipip_entry * 1015 mlxsw_sp_ipip_entry_alloc(struct mlxsw_sp *mlxsw_sp, 1016 enum mlxsw_sp_ipip_type ipipt, 1017 struct net_device *ol_dev) 1018 { 1019 const struct mlxsw_sp_ipip_ops *ipip_ops; 1020 struct mlxsw_sp_ipip_entry *ipip_entry; 1021 struct mlxsw_sp_ipip_entry *ret = NULL; 1022 1023 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipipt]; 1024 ipip_entry = kzalloc(sizeof(*ipip_entry), GFP_KERNEL); 1025 if (!ipip_entry) 1026 return ERR_PTR(-ENOMEM); 1027 1028 ipip_entry->ol_lb = mlxsw_sp_ipip_ol_ipip_lb_create(mlxsw_sp, ipipt, 1029 ol_dev, NULL); 1030 if (IS_ERR(ipip_entry->ol_lb)) { 1031 ret = ERR_CAST(ipip_entry->ol_lb); 1032 goto err_ol_ipip_lb_create; 1033 } 1034 1035 ipip_entry->ipipt = ipipt; 1036 ipip_entry->ol_dev = ol_dev; 1037 1038 switch (ipip_ops->ul_proto) { 1039 case MLXSW_SP_L3_PROTO_IPV4: 1040 ipip_entry->parms4 = mlxsw_sp_ipip_netdev_parms4(ol_dev); 1041 break; 1042 case MLXSW_SP_L3_PROTO_IPV6: 1043 WARN_ON(1); 1044 break; 1045 } 1046 1047 return ipip_entry; 1048 1049 err_ol_ipip_lb_create: 1050 kfree(ipip_entry); 1051 return ret; 1052 } 1053 1054 static void 1055 mlxsw_sp_ipip_entry_dealloc(struct mlxsw_sp_ipip_entry *ipip_entry) 1056 { 1057 mlxsw_sp_rif_destroy(&ipip_entry->ol_lb->common); 1058 kfree(ipip_entry); 1059 } 1060 1061 static bool 1062 mlxsw_sp_ipip_entry_saddr_matches(struct mlxsw_sp *mlxsw_sp, 1063 const enum mlxsw_sp_l3proto ul_proto, 1064 union mlxsw_sp_l3addr saddr, 1065 u32 ul_tb_id, 1066 struct mlxsw_sp_ipip_entry *ipip_entry) 1067 { 1068 u32 tun_ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ipip_entry->ol_dev); 1069 enum mlxsw_sp_ipip_type ipipt = ipip_entry->ipipt; 1070 union mlxsw_sp_l3addr tun_saddr; 1071 1072 if (mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto != ul_proto) 1073 return false; 1074 1075 tun_saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ipip_entry->ol_dev); 1076 return tun_ul_tb_id == ul_tb_id && 1077 mlxsw_sp_l3addr_eq(&tun_saddr, &saddr); 1078 } 1079 1080 static int 1081 mlxsw_sp_fib_entry_decap_init(struct mlxsw_sp *mlxsw_sp, 1082 struct mlxsw_sp_fib_entry *fib_entry, 1083 struct mlxsw_sp_ipip_entry *ipip_entry) 1084 { 1085 u32 tunnel_index; 1086 int err; 1087 1088 err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1089 1, &tunnel_index); 1090 if (err) 1091 return err; 1092 1093 ipip_entry->decap_fib_entry = fib_entry; 1094 fib_entry->decap.ipip_entry = ipip_entry; 1095 fib_entry->decap.tunnel_index = tunnel_index; 1096 return 0; 1097 } 1098 1099 static void mlxsw_sp_fib_entry_decap_fini(struct mlxsw_sp *mlxsw_sp, 1100 struct mlxsw_sp_fib_entry *fib_entry) 1101 { 1102 /* Unlink this node from the IPIP entry that it's the decap entry of. */ 1103 fib_entry->decap.ipip_entry->decap_fib_entry = NULL; 1104 fib_entry->decap.ipip_entry = NULL; 1105 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1106 1, fib_entry->decap.tunnel_index); 1107 } 1108 1109 static struct mlxsw_sp_fib_node * 1110 mlxsw_sp_fib_node_lookup(struct mlxsw_sp_fib *fib, const void *addr, 1111 size_t addr_len, unsigned char prefix_len); 1112 static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp, 1113 struct mlxsw_sp_fib_entry *fib_entry); 1114 1115 static void 1116 mlxsw_sp_ipip_entry_demote_decap(struct mlxsw_sp *mlxsw_sp, 1117 struct mlxsw_sp_ipip_entry *ipip_entry) 1118 { 1119 struct mlxsw_sp_fib_entry *fib_entry = ipip_entry->decap_fib_entry; 1120 1121 mlxsw_sp_fib_entry_decap_fini(mlxsw_sp, fib_entry); 1122 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 1123 1124 mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 1125 } 1126 1127 static void 1128 mlxsw_sp_ipip_entry_promote_decap(struct mlxsw_sp *mlxsw_sp, 1129 struct mlxsw_sp_ipip_entry *ipip_entry, 1130 struct mlxsw_sp_fib_entry *decap_fib_entry) 1131 { 1132 if (mlxsw_sp_fib_entry_decap_init(mlxsw_sp, decap_fib_entry, 1133 ipip_entry)) 1134 return; 1135 decap_fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP; 1136 1137 if (mlxsw_sp_fib_entry_update(mlxsw_sp, decap_fib_entry)) 1138 mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry); 1139 } 1140 1141 static struct mlxsw_sp_fib_entry * 1142 mlxsw_sp_router_ip2me_fib_entry_find(struct mlxsw_sp *mlxsw_sp, u32 tb_id, 1143 enum mlxsw_sp_l3proto proto, 1144 const union mlxsw_sp_l3addr *addr, 1145 enum mlxsw_sp_fib_entry_type type) 1146 { 1147 struct mlxsw_sp_fib_node *fib_node; 1148 unsigned char addr_prefix_len; 1149 struct mlxsw_sp_fib *fib; 1150 struct mlxsw_sp_vr *vr; 1151 const void *addrp; 1152 size_t addr_len; 1153 u32 addr4; 1154 1155 vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id); 1156 if (!vr) 1157 return NULL; 1158 fib = mlxsw_sp_vr_fib(vr, proto); 1159 1160 switch (proto) { 1161 case MLXSW_SP_L3_PROTO_IPV4: 1162 addr4 = be32_to_cpu(addr->addr4); 1163 addrp = &addr4; 1164 addr_len = 4; 1165 addr_prefix_len = 32; 1166 break; 1167 case MLXSW_SP_L3_PROTO_IPV6: 1168 default: 1169 WARN_ON(1); 1170 return NULL; 1171 } 1172 1173 fib_node = mlxsw_sp_fib_node_lookup(fib, addrp, addr_len, 1174 addr_prefix_len); 1175 if (!fib_node || fib_node->fib_entry->type != type) 1176 return NULL; 1177 1178 return fib_node->fib_entry; 1179 } 1180 1181 /* Given an IPIP entry, find the corresponding decap route. */ 1182 static struct mlxsw_sp_fib_entry * 1183 mlxsw_sp_ipip_entry_find_decap(struct mlxsw_sp *mlxsw_sp, 1184 struct mlxsw_sp_ipip_entry *ipip_entry) 1185 { 1186 static struct mlxsw_sp_fib_node *fib_node; 1187 const struct mlxsw_sp_ipip_ops *ipip_ops; 1188 unsigned char saddr_prefix_len; 1189 union mlxsw_sp_l3addr saddr; 1190 struct mlxsw_sp_fib *ul_fib; 1191 struct mlxsw_sp_vr *ul_vr; 1192 const void *saddrp; 1193 size_t saddr_len; 1194 u32 ul_tb_id; 1195 u32 saddr4; 1196 1197 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 1198 1199 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ipip_entry->ol_dev); 1200 ul_vr = mlxsw_sp_vr_find(mlxsw_sp, ul_tb_id); 1201 if (!ul_vr) 1202 return NULL; 1203 1204 ul_fib = mlxsw_sp_vr_fib(ul_vr, ipip_ops->ul_proto); 1205 saddr = mlxsw_sp_ipip_netdev_saddr(ipip_ops->ul_proto, 1206 ipip_entry->ol_dev); 1207 1208 switch (ipip_ops->ul_proto) { 1209 case MLXSW_SP_L3_PROTO_IPV4: 1210 saddr4 = be32_to_cpu(saddr.addr4); 1211 saddrp = &saddr4; 1212 saddr_len = 4; 1213 saddr_prefix_len = 32; 1214 break; 1215 default: 1216 WARN_ON(1); 1217 return NULL; 1218 } 1219 1220 fib_node = mlxsw_sp_fib_node_lookup(ul_fib, saddrp, saddr_len, 1221 saddr_prefix_len); 1222 if (!fib_node || 1223 fib_node->fib_entry->type != MLXSW_SP_FIB_ENTRY_TYPE_TRAP) 1224 return NULL; 1225 1226 return fib_node->fib_entry; 1227 } 1228 1229 static struct mlxsw_sp_ipip_entry * 1230 mlxsw_sp_ipip_entry_create(struct mlxsw_sp *mlxsw_sp, 1231 enum mlxsw_sp_ipip_type ipipt, 1232 struct net_device *ol_dev) 1233 { 1234 struct mlxsw_sp_ipip_entry *ipip_entry; 1235 1236 ipip_entry = mlxsw_sp_ipip_entry_alloc(mlxsw_sp, ipipt, ol_dev); 1237 if (IS_ERR(ipip_entry)) 1238 return ipip_entry; 1239 1240 list_add_tail(&ipip_entry->ipip_list_node, 1241 &mlxsw_sp->router->ipip_list); 1242 1243 return ipip_entry; 1244 } 1245 1246 static void 1247 mlxsw_sp_ipip_entry_destroy(struct mlxsw_sp *mlxsw_sp, 1248 struct mlxsw_sp_ipip_entry *ipip_entry) 1249 { 1250 list_del(&ipip_entry->ipip_list_node); 1251 mlxsw_sp_ipip_entry_dealloc(ipip_entry); 1252 } 1253 1254 static bool 1255 mlxsw_sp_ipip_entry_matches_decap(struct mlxsw_sp *mlxsw_sp, 1256 const struct net_device *ul_dev, 1257 enum mlxsw_sp_l3proto ul_proto, 1258 union mlxsw_sp_l3addr ul_dip, 1259 struct mlxsw_sp_ipip_entry *ipip_entry) 1260 { 1261 u32 ul_tb_id = l3mdev_fib_table(ul_dev) ? : RT_TABLE_MAIN; 1262 enum mlxsw_sp_ipip_type ipipt = ipip_entry->ipipt; 1263 1264 if (mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto != ul_proto) 1265 return false; 1266 1267 return mlxsw_sp_ipip_entry_saddr_matches(mlxsw_sp, ul_proto, ul_dip, 1268 ul_tb_id, ipip_entry); 1269 } 1270 1271 /* Given decap parameters, find the corresponding IPIP entry. */ 1272 static struct mlxsw_sp_ipip_entry * 1273 mlxsw_sp_ipip_entry_find_by_decap(struct mlxsw_sp *mlxsw_sp, 1274 const struct net_device *ul_dev, 1275 enum mlxsw_sp_l3proto ul_proto, 1276 union mlxsw_sp_l3addr ul_dip) 1277 { 1278 struct mlxsw_sp_ipip_entry *ipip_entry; 1279 1280 list_for_each_entry(ipip_entry, &mlxsw_sp->router->ipip_list, 1281 ipip_list_node) 1282 if (mlxsw_sp_ipip_entry_matches_decap(mlxsw_sp, ul_dev, 1283 ul_proto, ul_dip, 1284 ipip_entry)) 1285 return ipip_entry; 1286 1287 return NULL; 1288 } 1289 1290 static bool mlxsw_sp_netdev_ipip_type(const struct mlxsw_sp *mlxsw_sp, 1291 const struct net_device *dev, 1292 enum mlxsw_sp_ipip_type *p_type) 1293 { 1294 struct mlxsw_sp_router *router = mlxsw_sp->router; 1295 const struct mlxsw_sp_ipip_ops *ipip_ops; 1296 enum mlxsw_sp_ipip_type ipipt; 1297 1298 for (ipipt = 0; ipipt < MLXSW_SP_IPIP_TYPE_MAX; ++ipipt) { 1299 ipip_ops = router->ipip_ops_arr[ipipt]; 1300 if (dev->type == ipip_ops->dev_type) { 1301 if (p_type) 1302 *p_type = ipipt; 1303 return true; 1304 } 1305 } 1306 return false; 1307 } 1308 1309 bool mlxsw_sp_netdev_is_ipip_ol(const struct mlxsw_sp *mlxsw_sp, 1310 const struct net_device *dev) 1311 { 1312 return mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL); 1313 } 1314 1315 static struct mlxsw_sp_ipip_entry * 1316 mlxsw_sp_ipip_entry_find_by_ol_dev(struct mlxsw_sp *mlxsw_sp, 1317 const struct net_device *ol_dev) 1318 { 1319 struct mlxsw_sp_ipip_entry *ipip_entry; 1320 1321 list_for_each_entry(ipip_entry, &mlxsw_sp->router->ipip_list, 1322 ipip_list_node) 1323 if (ipip_entry->ol_dev == ol_dev) 1324 return ipip_entry; 1325 1326 return NULL; 1327 } 1328 1329 static struct mlxsw_sp_ipip_entry * 1330 mlxsw_sp_ipip_entry_find_by_ul_dev(const struct mlxsw_sp *mlxsw_sp, 1331 const struct net_device *ul_dev, 1332 struct mlxsw_sp_ipip_entry *start) 1333 { 1334 struct mlxsw_sp_ipip_entry *ipip_entry; 1335 1336 ipip_entry = list_prepare_entry(start, &mlxsw_sp->router->ipip_list, 1337 ipip_list_node); 1338 list_for_each_entry_continue(ipip_entry, &mlxsw_sp->router->ipip_list, 1339 ipip_list_node) { 1340 struct net_device *ol_dev = ipip_entry->ol_dev; 1341 struct net_device *ipip_ul_dev; 1342 1343 rcu_read_lock(); 1344 ipip_ul_dev = __mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev); 1345 rcu_read_unlock(); 1346 1347 if (ipip_ul_dev == ul_dev) 1348 return ipip_entry; 1349 } 1350 1351 return NULL; 1352 } 1353 1354 bool mlxsw_sp_netdev_is_ipip_ul(struct mlxsw_sp *mlxsw_sp, 1355 const struct net_device *dev) 1356 { 1357 bool is_ipip_ul; 1358 1359 mutex_lock(&mlxsw_sp->router->lock); 1360 is_ipip_ul = mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp, dev, NULL); 1361 mutex_unlock(&mlxsw_sp->router->lock); 1362 1363 return is_ipip_ul; 1364 } 1365 1366 static bool mlxsw_sp_netdevice_ipip_can_offload(struct mlxsw_sp *mlxsw_sp, 1367 const struct net_device *ol_dev, 1368 enum mlxsw_sp_ipip_type ipipt) 1369 { 1370 const struct mlxsw_sp_ipip_ops *ops 1371 = mlxsw_sp->router->ipip_ops_arr[ipipt]; 1372 1373 /* For deciding whether decap should be offloaded, we don't care about 1374 * overlay protocol, so ask whether either one is supported. 1375 */ 1376 return ops->can_offload(mlxsw_sp, ol_dev, MLXSW_SP_L3_PROTO_IPV4) || 1377 ops->can_offload(mlxsw_sp, ol_dev, MLXSW_SP_L3_PROTO_IPV6); 1378 } 1379 1380 static int mlxsw_sp_netdevice_ipip_ol_reg_event(struct mlxsw_sp *mlxsw_sp, 1381 struct net_device *ol_dev) 1382 { 1383 enum mlxsw_sp_ipip_type ipipt = MLXSW_SP_IPIP_TYPE_MAX; 1384 struct mlxsw_sp_ipip_entry *ipip_entry; 1385 enum mlxsw_sp_l3proto ul_proto; 1386 union mlxsw_sp_l3addr saddr; 1387 u32 ul_tb_id; 1388 1389 mlxsw_sp_netdev_ipip_type(mlxsw_sp, ol_dev, &ipipt); 1390 if (mlxsw_sp_netdevice_ipip_can_offload(mlxsw_sp, ol_dev, ipipt)) { 1391 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ol_dev); 1392 ul_proto = mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto; 1393 saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ol_dev); 1394 if (!mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp, ul_proto, 1395 saddr, ul_tb_id, 1396 NULL)) { 1397 ipip_entry = mlxsw_sp_ipip_entry_create(mlxsw_sp, ipipt, 1398 ol_dev); 1399 if (IS_ERR(ipip_entry)) 1400 return PTR_ERR(ipip_entry); 1401 } 1402 } 1403 1404 return 0; 1405 } 1406 1407 static void mlxsw_sp_netdevice_ipip_ol_unreg_event(struct mlxsw_sp *mlxsw_sp, 1408 struct net_device *ol_dev) 1409 { 1410 struct mlxsw_sp_ipip_entry *ipip_entry; 1411 1412 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1413 if (ipip_entry) 1414 mlxsw_sp_ipip_entry_destroy(mlxsw_sp, ipip_entry); 1415 } 1416 1417 static void 1418 mlxsw_sp_ipip_entry_ol_up_event(struct mlxsw_sp *mlxsw_sp, 1419 struct mlxsw_sp_ipip_entry *ipip_entry) 1420 { 1421 struct mlxsw_sp_fib_entry *decap_fib_entry; 1422 1423 decap_fib_entry = mlxsw_sp_ipip_entry_find_decap(mlxsw_sp, ipip_entry); 1424 if (decap_fib_entry) 1425 mlxsw_sp_ipip_entry_promote_decap(mlxsw_sp, ipip_entry, 1426 decap_fib_entry); 1427 } 1428 1429 static int 1430 mlxsw_sp_rif_ipip_lb_op(struct mlxsw_sp_rif_ipip_lb *lb_rif, u16 ul_vr_id, 1431 u16 ul_rif_id, bool enable) 1432 { 1433 struct mlxsw_sp_rif_ipip_lb_config lb_cf = lb_rif->lb_config; 1434 struct mlxsw_sp_rif *rif = &lb_rif->common; 1435 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 1436 char ritr_pl[MLXSW_REG_RITR_LEN]; 1437 u32 saddr4; 1438 1439 switch (lb_cf.ul_protocol) { 1440 case MLXSW_SP_L3_PROTO_IPV4: 1441 saddr4 = be32_to_cpu(lb_cf.saddr.addr4); 1442 mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF, 1443 rif->rif_index, rif->vr_id, rif->dev->mtu); 1444 mlxsw_reg_ritr_loopback_ipip4_pack(ritr_pl, lb_cf.lb_ipipt, 1445 MLXSW_REG_RITR_LOOPBACK_IPIP_OPTIONS_GRE_KEY_PRESET, 1446 ul_vr_id, ul_rif_id, saddr4, lb_cf.okey); 1447 break; 1448 1449 case MLXSW_SP_L3_PROTO_IPV6: 1450 return -EAFNOSUPPORT; 1451 } 1452 1453 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 1454 } 1455 1456 static int mlxsw_sp_netdevice_ipip_ol_update_mtu(struct mlxsw_sp *mlxsw_sp, 1457 struct net_device *ol_dev) 1458 { 1459 struct mlxsw_sp_ipip_entry *ipip_entry; 1460 struct mlxsw_sp_rif_ipip_lb *lb_rif; 1461 int err = 0; 1462 1463 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1464 if (ipip_entry) { 1465 lb_rif = ipip_entry->ol_lb; 1466 err = mlxsw_sp_rif_ipip_lb_op(lb_rif, lb_rif->ul_vr_id, 1467 lb_rif->ul_rif_id, true); 1468 if (err) 1469 goto out; 1470 lb_rif->common.mtu = ol_dev->mtu; 1471 } 1472 1473 out: 1474 return err; 1475 } 1476 1477 static void mlxsw_sp_netdevice_ipip_ol_up_event(struct mlxsw_sp *mlxsw_sp, 1478 struct net_device *ol_dev) 1479 { 1480 struct mlxsw_sp_ipip_entry *ipip_entry; 1481 1482 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1483 if (ipip_entry) 1484 mlxsw_sp_ipip_entry_ol_up_event(mlxsw_sp, ipip_entry); 1485 } 1486 1487 static void 1488 mlxsw_sp_ipip_entry_ol_down_event(struct mlxsw_sp *mlxsw_sp, 1489 struct mlxsw_sp_ipip_entry *ipip_entry) 1490 { 1491 if (ipip_entry->decap_fib_entry) 1492 mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry); 1493 } 1494 1495 static void mlxsw_sp_netdevice_ipip_ol_down_event(struct mlxsw_sp *mlxsw_sp, 1496 struct net_device *ol_dev) 1497 { 1498 struct mlxsw_sp_ipip_entry *ipip_entry; 1499 1500 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1501 if (ipip_entry) 1502 mlxsw_sp_ipip_entry_ol_down_event(mlxsw_sp, ipip_entry); 1503 } 1504 1505 static void mlxsw_sp_nexthop_rif_migrate(struct mlxsw_sp *mlxsw_sp, 1506 struct mlxsw_sp_rif *old_rif, 1507 struct mlxsw_sp_rif *new_rif); 1508 static int 1509 mlxsw_sp_ipip_entry_ol_lb_update(struct mlxsw_sp *mlxsw_sp, 1510 struct mlxsw_sp_ipip_entry *ipip_entry, 1511 bool keep_encap, 1512 struct netlink_ext_ack *extack) 1513 { 1514 struct mlxsw_sp_rif_ipip_lb *old_lb_rif = ipip_entry->ol_lb; 1515 struct mlxsw_sp_rif_ipip_lb *new_lb_rif; 1516 1517 new_lb_rif = mlxsw_sp_ipip_ol_ipip_lb_create(mlxsw_sp, 1518 ipip_entry->ipipt, 1519 ipip_entry->ol_dev, 1520 extack); 1521 if (IS_ERR(new_lb_rif)) 1522 return PTR_ERR(new_lb_rif); 1523 ipip_entry->ol_lb = new_lb_rif; 1524 1525 if (keep_encap) 1526 mlxsw_sp_nexthop_rif_migrate(mlxsw_sp, &old_lb_rif->common, 1527 &new_lb_rif->common); 1528 1529 mlxsw_sp_rif_destroy(&old_lb_rif->common); 1530 1531 return 0; 1532 } 1533 1534 static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp, 1535 struct mlxsw_sp_rif *rif); 1536 1537 /** 1538 * __mlxsw_sp_ipip_entry_update_tunnel - Update offload related to IPIP entry. 1539 * @mlxsw_sp: mlxsw_sp. 1540 * @ipip_entry: IPIP entry. 1541 * @recreate_loopback: Recreates the associated loopback RIF. 1542 * @keep_encap: Updates next hops that use the tunnel netdevice. This is only 1543 * relevant when recreate_loopback is true. 1544 * @update_nexthops: Updates next hops, keeping the current loopback RIF. This 1545 * is only relevant when recreate_loopback is false. 1546 * @extack: extack. 1547 * 1548 * Return: Non-zero value on failure. 1549 */ 1550 int __mlxsw_sp_ipip_entry_update_tunnel(struct mlxsw_sp *mlxsw_sp, 1551 struct mlxsw_sp_ipip_entry *ipip_entry, 1552 bool recreate_loopback, 1553 bool keep_encap, 1554 bool update_nexthops, 1555 struct netlink_ext_ack *extack) 1556 { 1557 int err; 1558 1559 /* RIFs can't be edited, so to update loopback, we need to destroy and 1560 * recreate it. That creates a window of opportunity where RALUE and 1561 * RATR registers end up referencing a RIF that's already gone. RATRs 1562 * are handled in mlxsw_sp_ipip_entry_ol_lb_update(), and to take care 1563 * of RALUE, demote the decap route back. 1564 */ 1565 if (ipip_entry->decap_fib_entry) 1566 mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry); 1567 1568 if (recreate_loopback) { 1569 err = mlxsw_sp_ipip_entry_ol_lb_update(mlxsw_sp, ipip_entry, 1570 keep_encap, extack); 1571 if (err) 1572 return err; 1573 } else if (update_nexthops) { 1574 mlxsw_sp_nexthop_rif_update(mlxsw_sp, 1575 &ipip_entry->ol_lb->common); 1576 } 1577 1578 if (ipip_entry->ol_dev->flags & IFF_UP) 1579 mlxsw_sp_ipip_entry_ol_up_event(mlxsw_sp, ipip_entry); 1580 1581 return 0; 1582 } 1583 1584 static int mlxsw_sp_netdevice_ipip_ol_vrf_event(struct mlxsw_sp *mlxsw_sp, 1585 struct net_device *ol_dev, 1586 struct netlink_ext_ack *extack) 1587 { 1588 struct mlxsw_sp_ipip_entry *ipip_entry = 1589 mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1590 1591 if (!ipip_entry) 1592 return 0; 1593 1594 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1595 true, false, false, extack); 1596 } 1597 1598 static int 1599 mlxsw_sp_netdevice_ipip_ul_vrf_event(struct mlxsw_sp *mlxsw_sp, 1600 struct mlxsw_sp_ipip_entry *ipip_entry, 1601 struct net_device *ul_dev, 1602 bool *demote_this, 1603 struct netlink_ext_ack *extack) 1604 { 1605 u32 ul_tb_id = l3mdev_fib_table(ul_dev) ? : RT_TABLE_MAIN; 1606 enum mlxsw_sp_l3proto ul_proto; 1607 union mlxsw_sp_l3addr saddr; 1608 1609 /* Moving underlay to a different VRF might cause local address 1610 * conflict, and the conflicting tunnels need to be demoted. 1611 */ 1612 ul_proto = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]->ul_proto; 1613 saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ipip_entry->ol_dev); 1614 if (mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp, ul_proto, 1615 saddr, ul_tb_id, 1616 ipip_entry)) { 1617 *demote_this = true; 1618 return 0; 1619 } 1620 1621 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1622 true, true, false, extack); 1623 } 1624 1625 static int 1626 mlxsw_sp_netdevice_ipip_ul_up_event(struct mlxsw_sp *mlxsw_sp, 1627 struct mlxsw_sp_ipip_entry *ipip_entry, 1628 struct net_device *ul_dev) 1629 { 1630 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1631 false, false, true, NULL); 1632 } 1633 1634 static int 1635 mlxsw_sp_netdevice_ipip_ul_down_event(struct mlxsw_sp *mlxsw_sp, 1636 struct mlxsw_sp_ipip_entry *ipip_entry, 1637 struct net_device *ul_dev) 1638 { 1639 /* A down underlay device causes encapsulated packets to not be 1640 * forwarded, but decap still works. So refresh next hops without 1641 * touching anything else. 1642 */ 1643 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1644 false, false, true, NULL); 1645 } 1646 1647 static int 1648 mlxsw_sp_netdevice_ipip_ol_change_event(struct mlxsw_sp *mlxsw_sp, 1649 struct net_device *ol_dev, 1650 struct netlink_ext_ack *extack) 1651 { 1652 const struct mlxsw_sp_ipip_ops *ipip_ops; 1653 struct mlxsw_sp_ipip_entry *ipip_entry; 1654 int err; 1655 1656 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1657 if (!ipip_entry) 1658 /* A change might make a tunnel eligible for offloading, but 1659 * that is currently not implemented. What falls to slow path 1660 * stays there. 1661 */ 1662 return 0; 1663 1664 /* A change might make a tunnel not eligible for offloading. */ 1665 if (!mlxsw_sp_netdevice_ipip_can_offload(mlxsw_sp, ol_dev, 1666 ipip_entry->ipipt)) { 1667 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1668 return 0; 1669 } 1670 1671 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 1672 err = ipip_ops->ol_netdev_change(mlxsw_sp, ipip_entry, extack); 1673 return err; 1674 } 1675 1676 void mlxsw_sp_ipip_entry_demote_tunnel(struct mlxsw_sp *mlxsw_sp, 1677 struct mlxsw_sp_ipip_entry *ipip_entry) 1678 { 1679 struct net_device *ol_dev = ipip_entry->ol_dev; 1680 1681 if (ol_dev->flags & IFF_UP) 1682 mlxsw_sp_ipip_entry_ol_down_event(mlxsw_sp, ipip_entry); 1683 mlxsw_sp_ipip_entry_destroy(mlxsw_sp, ipip_entry); 1684 } 1685 1686 /* The configuration where several tunnels have the same local address in the 1687 * same underlay table needs special treatment in the HW. That is currently not 1688 * implemented in the driver. This function finds and demotes the first tunnel 1689 * with a given source address, except the one passed in in the argument 1690 * `except'. 1691 */ 1692 bool 1693 mlxsw_sp_ipip_demote_tunnel_by_saddr(struct mlxsw_sp *mlxsw_sp, 1694 enum mlxsw_sp_l3proto ul_proto, 1695 union mlxsw_sp_l3addr saddr, 1696 u32 ul_tb_id, 1697 const struct mlxsw_sp_ipip_entry *except) 1698 { 1699 struct mlxsw_sp_ipip_entry *ipip_entry, *tmp; 1700 1701 list_for_each_entry_safe(ipip_entry, tmp, &mlxsw_sp->router->ipip_list, 1702 ipip_list_node) { 1703 if (ipip_entry != except && 1704 mlxsw_sp_ipip_entry_saddr_matches(mlxsw_sp, ul_proto, saddr, 1705 ul_tb_id, ipip_entry)) { 1706 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1707 return true; 1708 } 1709 } 1710 1711 return false; 1712 } 1713 1714 static void mlxsw_sp_ipip_demote_tunnel_by_ul_netdev(struct mlxsw_sp *mlxsw_sp, 1715 struct net_device *ul_dev) 1716 { 1717 struct mlxsw_sp_ipip_entry *ipip_entry, *tmp; 1718 1719 list_for_each_entry_safe(ipip_entry, tmp, &mlxsw_sp->router->ipip_list, 1720 ipip_list_node) { 1721 struct net_device *ol_dev = ipip_entry->ol_dev; 1722 struct net_device *ipip_ul_dev; 1723 1724 rcu_read_lock(); 1725 ipip_ul_dev = __mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev); 1726 rcu_read_unlock(); 1727 if (ipip_ul_dev == ul_dev) 1728 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1729 } 1730 } 1731 1732 int mlxsw_sp_netdevice_ipip_ol_event(struct mlxsw_sp *mlxsw_sp, 1733 struct net_device *ol_dev, 1734 unsigned long event, 1735 struct netdev_notifier_info *info) 1736 { 1737 struct netdev_notifier_changeupper_info *chup; 1738 struct netlink_ext_ack *extack; 1739 int err = 0; 1740 1741 mutex_lock(&mlxsw_sp->router->lock); 1742 switch (event) { 1743 case NETDEV_REGISTER: 1744 err = mlxsw_sp_netdevice_ipip_ol_reg_event(mlxsw_sp, ol_dev); 1745 break; 1746 case NETDEV_UNREGISTER: 1747 mlxsw_sp_netdevice_ipip_ol_unreg_event(mlxsw_sp, ol_dev); 1748 break; 1749 case NETDEV_UP: 1750 mlxsw_sp_netdevice_ipip_ol_up_event(mlxsw_sp, ol_dev); 1751 break; 1752 case NETDEV_DOWN: 1753 mlxsw_sp_netdevice_ipip_ol_down_event(mlxsw_sp, ol_dev); 1754 break; 1755 case NETDEV_CHANGEUPPER: 1756 chup = container_of(info, typeof(*chup), info); 1757 extack = info->extack; 1758 if (netif_is_l3_master(chup->upper_dev)) 1759 err = mlxsw_sp_netdevice_ipip_ol_vrf_event(mlxsw_sp, 1760 ol_dev, 1761 extack); 1762 break; 1763 case NETDEV_CHANGE: 1764 extack = info->extack; 1765 err = mlxsw_sp_netdevice_ipip_ol_change_event(mlxsw_sp, 1766 ol_dev, extack); 1767 break; 1768 case NETDEV_CHANGEMTU: 1769 err = mlxsw_sp_netdevice_ipip_ol_update_mtu(mlxsw_sp, ol_dev); 1770 break; 1771 } 1772 mutex_unlock(&mlxsw_sp->router->lock); 1773 return err; 1774 } 1775 1776 static int 1777 __mlxsw_sp_netdevice_ipip_ul_event(struct mlxsw_sp *mlxsw_sp, 1778 struct mlxsw_sp_ipip_entry *ipip_entry, 1779 struct net_device *ul_dev, 1780 bool *demote_this, 1781 unsigned long event, 1782 struct netdev_notifier_info *info) 1783 { 1784 struct netdev_notifier_changeupper_info *chup; 1785 struct netlink_ext_ack *extack; 1786 1787 switch (event) { 1788 case NETDEV_CHANGEUPPER: 1789 chup = container_of(info, typeof(*chup), info); 1790 extack = info->extack; 1791 if (netif_is_l3_master(chup->upper_dev)) 1792 return mlxsw_sp_netdevice_ipip_ul_vrf_event(mlxsw_sp, 1793 ipip_entry, 1794 ul_dev, 1795 demote_this, 1796 extack); 1797 break; 1798 1799 case NETDEV_UP: 1800 return mlxsw_sp_netdevice_ipip_ul_up_event(mlxsw_sp, ipip_entry, 1801 ul_dev); 1802 case NETDEV_DOWN: 1803 return mlxsw_sp_netdevice_ipip_ul_down_event(mlxsw_sp, 1804 ipip_entry, 1805 ul_dev); 1806 } 1807 return 0; 1808 } 1809 1810 int 1811 mlxsw_sp_netdevice_ipip_ul_event(struct mlxsw_sp *mlxsw_sp, 1812 struct net_device *ul_dev, 1813 unsigned long event, 1814 struct netdev_notifier_info *info) 1815 { 1816 struct mlxsw_sp_ipip_entry *ipip_entry = NULL; 1817 int err = 0; 1818 1819 mutex_lock(&mlxsw_sp->router->lock); 1820 while ((ipip_entry = mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp, 1821 ul_dev, 1822 ipip_entry))) { 1823 struct mlxsw_sp_ipip_entry *prev; 1824 bool demote_this = false; 1825 1826 err = __mlxsw_sp_netdevice_ipip_ul_event(mlxsw_sp, ipip_entry, 1827 ul_dev, &demote_this, 1828 event, info); 1829 if (err) { 1830 mlxsw_sp_ipip_demote_tunnel_by_ul_netdev(mlxsw_sp, 1831 ul_dev); 1832 break; 1833 } 1834 1835 if (demote_this) { 1836 if (list_is_first(&ipip_entry->ipip_list_node, 1837 &mlxsw_sp->router->ipip_list)) 1838 prev = NULL; 1839 else 1840 /* This can't be cached from previous iteration, 1841 * because that entry could be gone now. 1842 */ 1843 prev = list_prev_entry(ipip_entry, 1844 ipip_list_node); 1845 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1846 ipip_entry = prev; 1847 } 1848 } 1849 mutex_unlock(&mlxsw_sp->router->lock); 1850 1851 return err; 1852 } 1853 1854 int mlxsw_sp_router_nve_promote_decap(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id, 1855 enum mlxsw_sp_l3proto ul_proto, 1856 const union mlxsw_sp_l3addr *ul_sip, 1857 u32 tunnel_index) 1858 { 1859 enum mlxsw_sp_fib_entry_type type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 1860 struct mlxsw_sp_router *router = mlxsw_sp->router; 1861 struct mlxsw_sp_fib_entry *fib_entry; 1862 int err = 0; 1863 1864 mutex_lock(&mlxsw_sp->router->lock); 1865 1866 if (WARN_ON_ONCE(router->nve_decap_config.valid)) { 1867 err = -EINVAL; 1868 goto out; 1869 } 1870 1871 router->nve_decap_config.ul_tb_id = ul_tb_id; 1872 router->nve_decap_config.tunnel_index = tunnel_index; 1873 router->nve_decap_config.ul_proto = ul_proto; 1874 router->nve_decap_config.ul_sip = *ul_sip; 1875 router->nve_decap_config.valid = true; 1876 1877 /* It is valid to create a tunnel with a local IP and only later 1878 * assign this IP address to a local interface 1879 */ 1880 fib_entry = mlxsw_sp_router_ip2me_fib_entry_find(mlxsw_sp, ul_tb_id, 1881 ul_proto, ul_sip, 1882 type); 1883 if (!fib_entry) 1884 goto out; 1885 1886 fib_entry->decap.tunnel_index = tunnel_index; 1887 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP; 1888 1889 err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 1890 if (err) 1891 goto err_fib_entry_update; 1892 1893 goto out; 1894 1895 err_fib_entry_update: 1896 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 1897 mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 1898 out: 1899 mutex_unlock(&mlxsw_sp->router->lock); 1900 return err; 1901 } 1902 1903 void mlxsw_sp_router_nve_demote_decap(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id, 1904 enum mlxsw_sp_l3proto ul_proto, 1905 const union mlxsw_sp_l3addr *ul_sip) 1906 { 1907 enum mlxsw_sp_fib_entry_type type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP; 1908 struct mlxsw_sp_router *router = mlxsw_sp->router; 1909 struct mlxsw_sp_fib_entry *fib_entry; 1910 1911 mutex_lock(&mlxsw_sp->router->lock); 1912 1913 if (WARN_ON_ONCE(!router->nve_decap_config.valid)) 1914 goto out; 1915 1916 router->nve_decap_config.valid = false; 1917 1918 fib_entry = mlxsw_sp_router_ip2me_fib_entry_find(mlxsw_sp, ul_tb_id, 1919 ul_proto, ul_sip, 1920 type); 1921 if (!fib_entry) 1922 goto out; 1923 1924 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 1925 mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 1926 out: 1927 mutex_unlock(&mlxsw_sp->router->lock); 1928 } 1929 1930 static bool mlxsw_sp_router_nve_is_decap(struct mlxsw_sp *mlxsw_sp, 1931 u32 ul_tb_id, 1932 enum mlxsw_sp_l3proto ul_proto, 1933 const union mlxsw_sp_l3addr *ul_sip) 1934 { 1935 struct mlxsw_sp_router *router = mlxsw_sp->router; 1936 1937 return router->nve_decap_config.valid && 1938 router->nve_decap_config.ul_tb_id == ul_tb_id && 1939 router->nve_decap_config.ul_proto == ul_proto && 1940 !memcmp(&router->nve_decap_config.ul_sip, ul_sip, 1941 sizeof(*ul_sip)); 1942 } 1943 1944 struct mlxsw_sp_neigh_key { 1945 struct neighbour *n; 1946 }; 1947 1948 struct mlxsw_sp_neigh_entry { 1949 struct list_head rif_list_node; 1950 struct rhash_head ht_node; 1951 struct mlxsw_sp_neigh_key key; 1952 u16 rif; 1953 bool connected; 1954 unsigned char ha[ETH_ALEN]; 1955 struct list_head nexthop_list; /* list of nexthops using 1956 * this neigh entry 1957 */ 1958 struct list_head nexthop_neighs_list_node; 1959 unsigned int counter_index; 1960 bool counter_valid; 1961 }; 1962 1963 static const struct rhashtable_params mlxsw_sp_neigh_ht_params = { 1964 .key_offset = offsetof(struct mlxsw_sp_neigh_entry, key), 1965 .head_offset = offsetof(struct mlxsw_sp_neigh_entry, ht_node), 1966 .key_len = sizeof(struct mlxsw_sp_neigh_key), 1967 }; 1968 1969 struct mlxsw_sp_neigh_entry * 1970 mlxsw_sp_rif_neigh_next(struct mlxsw_sp_rif *rif, 1971 struct mlxsw_sp_neigh_entry *neigh_entry) 1972 { 1973 if (!neigh_entry) { 1974 if (list_empty(&rif->neigh_list)) 1975 return NULL; 1976 else 1977 return list_first_entry(&rif->neigh_list, 1978 typeof(*neigh_entry), 1979 rif_list_node); 1980 } 1981 if (list_is_last(&neigh_entry->rif_list_node, &rif->neigh_list)) 1982 return NULL; 1983 return list_next_entry(neigh_entry, rif_list_node); 1984 } 1985 1986 int mlxsw_sp_neigh_entry_type(struct mlxsw_sp_neigh_entry *neigh_entry) 1987 { 1988 return neigh_entry->key.n->tbl->family; 1989 } 1990 1991 unsigned char * 1992 mlxsw_sp_neigh_entry_ha(struct mlxsw_sp_neigh_entry *neigh_entry) 1993 { 1994 return neigh_entry->ha; 1995 } 1996 1997 u32 mlxsw_sp_neigh4_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry) 1998 { 1999 struct neighbour *n; 2000 2001 n = neigh_entry->key.n; 2002 return ntohl(*((__be32 *) n->primary_key)); 2003 } 2004 2005 struct in6_addr * 2006 mlxsw_sp_neigh6_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry) 2007 { 2008 struct neighbour *n; 2009 2010 n = neigh_entry->key.n; 2011 return (struct in6_addr *) &n->primary_key; 2012 } 2013 2014 int mlxsw_sp_neigh_counter_get(struct mlxsw_sp *mlxsw_sp, 2015 struct mlxsw_sp_neigh_entry *neigh_entry, 2016 u64 *p_counter) 2017 { 2018 if (!neigh_entry->counter_valid) 2019 return -EINVAL; 2020 2021 return mlxsw_sp_flow_counter_get(mlxsw_sp, neigh_entry->counter_index, 2022 p_counter, NULL); 2023 } 2024 2025 static struct mlxsw_sp_neigh_entry * 2026 mlxsw_sp_neigh_entry_alloc(struct mlxsw_sp *mlxsw_sp, struct neighbour *n, 2027 u16 rif) 2028 { 2029 struct mlxsw_sp_neigh_entry *neigh_entry; 2030 2031 neigh_entry = kzalloc(sizeof(*neigh_entry), GFP_KERNEL); 2032 if (!neigh_entry) 2033 return NULL; 2034 2035 neigh_entry->key.n = n; 2036 neigh_entry->rif = rif; 2037 INIT_LIST_HEAD(&neigh_entry->nexthop_list); 2038 2039 return neigh_entry; 2040 } 2041 2042 static void mlxsw_sp_neigh_entry_free(struct mlxsw_sp_neigh_entry *neigh_entry) 2043 { 2044 kfree(neigh_entry); 2045 } 2046 2047 static int 2048 mlxsw_sp_neigh_entry_insert(struct mlxsw_sp *mlxsw_sp, 2049 struct mlxsw_sp_neigh_entry *neigh_entry) 2050 { 2051 return rhashtable_insert_fast(&mlxsw_sp->router->neigh_ht, 2052 &neigh_entry->ht_node, 2053 mlxsw_sp_neigh_ht_params); 2054 } 2055 2056 static void 2057 mlxsw_sp_neigh_entry_remove(struct mlxsw_sp *mlxsw_sp, 2058 struct mlxsw_sp_neigh_entry *neigh_entry) 2059 { 2060 rhashtable_remove_fast(&mlxsw_sp->router->neigh_ht, 2061 &neigh_entry->ht_node, 2062 mlxsw_sp_neigh_ht_params); 2063 } 2064 2065 static bool 2066 mlxsw_sp_neigh_counter_should_alloc(struct mlxsw_sp *mlxsw_sp, 2067 struct mlxsw_sp_neigh_entry *neigh_entry) 2068 { 2069 struct devlink *devlink; 2070 const char *table_name; 2071 2072 switch (mlxsw_sp_neigh_entry_type(neigh_entry)) { 2073 case AF_INET: 2074 table_name = MLXSW_SP_DPIPE_TABLE_NAME_HOST4; 2075 break; 2076 case AF_INET6: 2077 table_name = MLXSW_SP_DPIPE_TABLE_NAME_HOST6; 2078 break; 2079 default: 2080 WARN_ON(1); 2081 return false; 2082 } 2083 2084 devlink = priv_to_devlink(mlxsw_sp->core); 2085 return devlink_dpipe_table_counter_enabled(devlink, table_name); 2086 } 2087 2088 static void 2089 mlxsw_sp_neigh_counter_alloc(struct mlxsw_sp *mlxsw_sp, 2090 struct mlxsw_sp_neigh_entry *neigh_entry) 2091 { 2092 if (!mlxsw_sp_neigh_counter_should_alloc(mlxsw_sp, neigh_entry)) 2093 return; 2094 2095 if (mlxsw_sp_flow_counter_alloc(mlxsw_sp, &neigh_entry->counter_index)) 2096 return; 2097 2098 neigh_entry->counter_valid = true; 2099 } 2100 2101 static void 2102 mlxsw_sp_neigh_counter_free(struct mlxsw_sp *mlxsw_sp, 2103 struct mlxsw_sp_neigh_entry *neigh_entry) 2104 { 2105 if (!neigh_entry->counter_valid) 2106 return; 2107 mlxsw_sp_flow_counter_free(mlxsw_sp, 2108 neigh_entry->counter_index); 2109 neigh_entry->counter_valid = false; 2110 } 2111 2112 static struct mlxsw_sp_neigh_entry * 2113 mlxsw_sp_neigh_entry_create(struct mlxsw_sp *mlxsw_sp, struct neighbour *n) 2114 { 2115 struct mlxsw_sp_neigh_entry *neigh_entry; 2116 struct mlxsw_sp_rif *rif; 2117 int err; 2118 2119 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, n->dev); 2120 if (!rif) 2121 return ERR_PTR(-EINVAL); 2122 2123 neigh_entry = mlxsw_sp_neigh_entry_alloc(mlxsw_sp, n, rif->rif_index); 2124 if (!neigh_entry) 2125 return ERR_PTR(-ENOMEM); 2126 2127 err = mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry); 2128 if (err) 2129 goto err_neigh_entry_insert; 2130 2131 mlxsw_sp_neigh_counter_alloc(mlxsw_sp, neigh_entry); 2132 list_add(&neigh_entry->rif_list_node, &rif->neigh_list); 2133 2134 return neigh_entry; 2135 2136 err_neigh_entry_insert: 2137 mlxsw_sp_neigh_entry_free(neigh_entry); 2138 return ERR_PTR(err); 2139 } 2140 2141 static void 2142 mlxsw_sp_neigh_entry_destroy(struct mlxsw_sp *mlxsw_sp, 2143 struct mlxsw_sp_neigh_entry *neigh_entry) 2144 { 2145 list_del(&neigh_entry->rif_list_node); 2146 mlxsw_sp_neigh_counter_free(mlxsw_sp, neigh_entry); 2147 mlxsw_sp_neigh_entry_remove(mlxsw_sp, neigh_entry); 2148 mlxsw_sp_neigh_entry_free(neigh_entry); 2149 } 2150 2151 static struct mlxsw_sp_neigh_entry * 2152 mlxsw_sp_neigh_entry_lookup(struct mlxsw_sp *mlxsw_sp, struct neighbour *n) 2153 { 2154 struct mlxsw_sp_neigh_key key; 2155 2156 key.n = n; 2157 return rhashtable_lookup_fast(&mlxsw_sp->router->neigh_ht, 2158 &key, mlxsw_sp_neigh_ht_params); 2159 } 2160 2161 static void 2162 mlxsw_sp_router_neighs_update_interval_init(struct mlxsw_sp *mlxsw_sp) 2163 { 2164 unsigned long interval; 2165 2166 #if IS_ENABLED(CONFIG_IPV6) 2167 interval = min_t(unsigned long, 2168 NEIGH_VAR(&arp_tbl.parms, DELAY_PROBE_TIME), 2169 NEIGH_VAR(&nd_tbl.parms, DELAY_PROBE_TIME)); 2170 #else 2171 interval = NEIGH_VAR(&arp_tbl.parms, DELAY_PROBE_TIME); 2172 #endif 2173 mlxsw_sp->router->neighs_update.interval = jiffies_to_msecs(interval); 2174 } 2175 2176 static void mlxsw_sp_router_neigh_ent_ipv4_process(struct mlxsw_sp *mlxsw_sp, 2177 char *rauhtd_pl, 2178 int ent_index) 2179 { 2180 struct net_device *dev; 2181 struct neighbour *n; 2182 __be32 dipn; 2183 u32 dip; 2184 u16 rif; 2185 2186 mlxsw_reg_rauhtd_ent_ipv4_unpack(rauhtd_pl, ent_index, &rif, &dip); 2187 2188 if (!mlxsw_sp->router->rifs[rif]) { 2189 dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect RIF in neighbour entry\n"); 2190 return; 2191 } 2192 2193 dipn = htonl(dip); 2194 dev = mlxsw_sp->router->rifs[rif]->dev; 2195 n = neigh_lookup(&arp_tbl, &dipn, dev); 2196 if (!n) 2197 return; 2198 2199 netdev_dbg(dev, "Updating neighbour with IP=%pI4h\n", &dip); 2200 neigh_event_send(n, NULL); 2201 neigh_release(n); 2202 } 2203 2204 #if IS_ENABLED(CONFIG_IPV6) 2205 static void mlxsw_sp_router_neigh_ent_ipv6_process(struct mlxsw_sp *mlxsw_sp, 2206 char *rauhtd_pl, 2207 int rec_index) 2208 { 2209 struct net_device *dev; 2210 struct neighbour *n; 2211 struct in6_addr dip; 2212 u16 rif; 2213 2214 mlxsw_reg_rauhtd_ent_ipv6_unpack(rauhtd_pl, rec_index, &rif, 2215 (char *) &dip); 2216 2217 if (!mlxsw_sp->router->rifs[rif]) { 2218 dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect RIF in neighbour entry\n"); 2219 return; 2220 } 2221 2222 dev = mlxsw_sp->router->rifs[rif]->dev; 2223 n = neigh_lookup(&nd_tbl, &dip, dev); 2224 if (!n) 2225 return; 2226 2227 netdev_dbg(dev, "Updating neighbour with IP=%pI6c\n", &dip); 2228 neigh_event_send(n, NULL); 2229 neigh_release(n); 2230 } 2231 #else 2232 static void mlxsw_sp_router_neigh_ent_ipv6_process(struct mlxsw_sp *mlxsw_sp, 2233 char *rauhtd_pl, 2234 int rec_index) 2235 { 2236 } 2237 #endif 2238 2239 static void mlxsw_sp_router_neigh_rec_ipv4_process(struct mlxsw_sp *mlxsw_sp, 2240 char *rauhtd_pl, 2241 int rec_index) 2242 { 2243 u8 num_entries; 2244 int i; 2245 2246 num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl, 2247 rec_index); 2248 /* Hardware starts counting at 0, so add 1. */ 2249 num_entries++; 2250 2251 /* Each record consists of several neighbour entries. */ 2252 for (i = 0; i < num_entries; i++) { 2253 int ent_index; 2254 2255 ent_index = rec_index * MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC + i; 2256 mlxsw_sp_router_neigh_ent_ipv4_process(mlxsw_sp, rauhtd_pl, 2257 ent_index); 2258 } 2259 2260 } 2261 2262 static void mlxsw_sp_router_neigh_rec_ipv6_process(struct mlxsw_sp *mlxsw_sp, 2263 char *rauhtd_pl, 2264 int rec_index) 2265 { 2266 /* One record contains one entry. */ 2267 mlxsw_sp_router_neigh_ent_ipv6_process(mlxsw_sp, rauhtd_pl, 2268 rec_index); 2269 } 2270 2271 static void mlxsw_sp_router_neigh_rec_process(struct mlxsw_sp *mlxsw_sp, 2272 char *rauhtd_pl, int rec_index) 2273 { 2274 switch (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, rec_index)) { 2275 case MLXSW_REG_RAUHTD_TYPE_IPV4: 2276 mlxsw_sp_router_neigh_rec_ipv4_process(mlxsw_sp, rauhtd_pl, 2277 rec_index); 2278 break; 2279 case MLXSW_REG_RAUHTD_TYPE_IPV6: 2280 mlxsw_sp_router_neigh_rec_ipv6_process(mlxsw_sp, rauhtd_pl, 2281 rec_index); 2282 break; 2283 } 2284 } 2285 2286 static bool mlxsw_sp_router_rauhtd_is_full(char *rauhtd_pl) 2287 { 2288 u8 num_rec, last_rec_index, num_entries; 2289 2290 num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl); 2291 last_rec_index = num_rec - 1; 2292 2293 if (num_rec < MLXSW_REG_RAUHTD_REC_MAX_NUM) 2294 return false; 2295 if (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, last_rec_index) == 2296 MLXSW_REG_RAUHTD_TYPE_IPV6) 2297 return true; 2298 2299 num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl, 2300 last_rec_index); 2301 if (++num_entries == MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC) 2302 return true; 2303 return false; 2304 } 2305 2306 static int 2307 __mlxsw_sp_router_neighs_update_rauhtd(struct mlxsw_sp *mlxsw_sp, 2308 char *rauhtd_pl, 2309 enum mlxsw_reg_rauhtd_type type) 2310 { 2311 int i, num_rec; 2312 int err; 2313 2314 /* Ensure the RIF we read from the device does not change mid-dump. */ 2315 mutex_lock(&mlxsw_sp->router->lock); 2316 do { 2317 mlxsw_reg_rauhtd_pack(rauhtd_pl, type); 2318 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(rauhtd), 2319 rauhtd_pl); 2320 if (err) { 2321 dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to dump neighbour table\n"); 2322 break; 2323 } 2324 num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl); 2325 for (i = 0; i < num_rec; i++) 2326 mlxsw_sp_router_neigh_rec_process(mlxsw_sp, rauhtd_pl, 2327 i); 2328 } while (mlxsw_sp_router_rauhtd_is_full(rauhtd_pl)); 2329 mutex_unlock(&mlxsw_sp->router->lock); 2330 2331 return err; 2332 } 2333 2334 static int mlxsw_sp_router_neighs_update_rauhtd(struct mlxsw_sp *mlxsw_sp) 2335 { 2336 enum mlxsw_reg_rauhtd_type type; 2337 char *rauhtd_pl; 2338 int err; 2339 2340 rauhtd_pl = kmalloc(MLXSW_REG_RAUHTD_LEN, GFP_KERNEL); 2341 if (!rauhtd_pl) 2342 return -ENOMEM; 2343 2344 type = MLXSW_REG_RAUHTD_TYPE_IPV4; 2345 err = __mlxsw_sp_router_neighs_update_rauhtd(mlxsw_sp, rauhtd_pl, type); 2346 if (err) 2347 goto out; 2348 2349 type = MLXSW_REG_RAUHTD_TYPE_IPV6; 2350 err = __mlxsw_sp_router_neighs_update_rauhtd(mlxsw_sp, rauhtd_pl, type); 2351 out: 2352 kfree(rauhtd_pl); 2353 return err; 2354 } 2355 2356 static void mlxsw_sp_router_neighs_update_nh(struct mlxsw_sp *mlxsw_sp) 2357 { 2358 struct mlxsw_sp_neigh_entry *neigh_entry; 2359 2360 mutex_lock(&mlxsw_sp->router->lock); 2361 list_for_each_entry(neigh_entry, &mlxsw_sp->router->nexthop_neighs_list, 2362 nexthop_neighs_list_node) 2363 /* If this neigh have nexthops, make the kernel think this neigh 2364 * is active regardless of the traffic. 2365 */ 2366 neigh_event_send(neigh_entry->key.n, NULL); 2367 mutex_unlock(&mlxsw_sp->router->lock); 2368 } 2369 2370 static void 2371 mlxsw_sp_router_neighs_update_work_schedule(struct mlxsw_sp *mlxsw_sp) 2372 { 2373 unsigned long interval = mlxsw_sp->router->neighs_update.interval; 2374 2375 mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw, 2376 msecs_to_jiffies(interval)); 2377 } 2378 2379 static void mlxsw_sp_router_neighs_update_work(struct work_struct *work) 2380 { 2381 struct mlxsw_sp_router *router; 2382 int err; 2383 2384 router = container_of(work, struct mlxsw_sp_router, 2385 neighs_update.dw.work); 2386 err = mlxsw_sp_router_neighs_update_rauhtd(router->mlxsw_sp); 2387 if (err) 2388 dev_err(router->mlxsw_sp->bus_info->dev, "Could not update kernel for neigh activity"); 2389 2390 mlxsw_sp_router_neighs_update_nh(router->mlxsw_sp); 2391 2392 mlxsw_sp_router_neighs_update_work_schedule(router->mlxsw_sp); 2393 } 2394 2395 static void mlxsw_sp_router_probe_unresolved_nexthops(struct work_struct *work) 2396 { 2397 struct mlxsw_sp_neigh_entry *neigh_entry; 2398 struct mlxsw_sp_router *router; 2399 2400 router = container_of(work, struct mlxsw_sp_router, 2401 nexthop_probe_dw.work); 2402 /* Iterate over nexthop neighbours, find those who are unresolved and 2403 * send arp on them. This solves the chicken-egg problem when 2404 * the nexthop wouldn't get offloaded until the neighbor is resolved 2405 * but it wouldn't get resolved ever in case traffic is flowing in HW 2406 * using different nexthop. 2407 */ 2408 mutex_lock(&router->lock); 2409 list_for_each_entry(neigh_entry, &router->nexthop_neighs_list, 2410 nexthop_neighs_list_node) 2411 if (!neigh_entry->connected) 2412 neigh_event_send(neigh_entry->key.n, NULL); 2413 mutex_unlock(&router->lock); 2414 2415 mlxsw_core_schedule_dw(&router->nexthop_probe_dw, 2416 MLXSW_SP_UNRESOLVED_NH_PROBE_INTERVAL); 2417 } 2418 2419 static void 2420 mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp *mlxsw_sp, 2421 struct mlxsw_sp_neigh_entry *neigh_entry, 2422 bool removing, bool dead); 2423 2424 static enum mlxsw_reg_rauht_op mlxsw_sp_rauht_op(bool adding) 2425 { 2426 return adding ? MLXSW_REG_RAUHT_OP_WRITE_ADD : 2427 MLXSW_REG_RAUHT_OP_WRITE_DELETE; 2428 } 2429 2430 static int 2431 mlxsw_sp_router_neigh_entry_op4(struct mlxsw_sp *mlxsw_sp, 2432 struct mlxsw_sp_neigh_entry *neigh_entry, 2433 enum mlxsw_reg_rauht_op op) 2434 { 2435 struct neighbour *n = neigh_entry->key.n; 2436 u32 dip = ntohl(*((__be32 *) n->primary_key)); 2437 char rauht_pl[MLXSW_REG_RAUHT_LEN]; 2438 2439 mlxsw_reg_rauht_pack4(rauht_pl, op, neigh_entry->rif, neigh_entry->ha, 2440 dip); 2441 if (neigh_entry->counter_valid) 2442 mlxsw_reg_rauht_pack_counter(rauht_pl, 2443 neigh_entry->counter_index); 2444 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl); 2445 } 2446 2447 static int 2448 mlxsw_sp_router_neigh_entry_op6(struct mlxsw_sp *mlxsw_sp, 2449 struct mlxsw_sp_neigh_entry *neigh_entry, 2450 enum mlxsw_reg_rauht_op op) 2451 { 2452 struct neighbour *n = neigh_entry->key.n; 2453 char rauht_pl[MLXSW_REG_RAUHT_LEN]; 2454 const char *dip = n->primary_key; 2455 2456 mlxsw_reg_rauht_pack6(rauht_pl, op, neigh_entry->rif, neigh_entry->ha, 2457 dip); 2458 if (neigh_entry->counter_valid) 2459 mlxsw_reg_rauht_pack_counter(rauht_pl, 2460 neigh_entry->counter_index); 2461 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl); 2462 } 2463 2464 bool mlxsw_sp_neigh_ipv6_ignore(struct mlxsw_sp_neigh_entry *neigh_entry) 2465 { 2466 struct neighbour *n = neigh_entry->key.n; 2467 2468 /* Packets with a link-local destination address are trapped 2469 * after LPM lookup and never reach the neighbour table, so 2470 * there is no need to program such neighbours to the device. 2471 */ 2472 if (ipv6_addr_type((struct in6_addr *) &n->primary_key) & 2473 IPV6_ADDR_LINKLOCAL) 2474 return true; 2475 return false; 2476 } 2477 2478 static void 2479 mlxsw_sp_neigh_entry_update(struct mlxsw_sp *mlxsw_sp, 2480 struct mlxsw_sp_neigh_entry *neigh_entry, 2481 bool adding) 2482 { 2483 enum mlxsw_reg_rauht_op op = mlxsw_sp_rauht_op(adding); 2484 int err; 2485 2486 if (!adding && !neigh_entry->connected) 2487 return; 2488 neigh_entry->connected = adding; 2489 if (neigh_entry->key.n->tbl->family == AF_INET) { 2490 err = mlxsw_sp_router_neigh_entry_op4(mlxsw_sp, neigh_entry, 2491 op); 2492 if (err) 2493 return; 2494 } else if (neigh_entry->key.n->tbl->family == AF_INET6) { 2495 if (mlxsw_sp_neigh_ipv6_ignore(neigh_entry)) 2496 return; 2497 err = mlxsw_sp_router_neigh_entry_op6(mlxsw_sp, neigh_entry, 2498 op); 2499 if (err) 2500 return; 2501 } else { 2502 WARN_ON_ONCE(1); 2503 return; 2504 } 2505 2506 if (adding) 2507 neigh_entry->key.n->flags |= NTF_OFFLOADED; 2508 else 2509 neigh_entry->key.n->flags &= ~NTF_OFFLOADED; 2510 } 2511 2512 void 2513 mlxsw_sp_neigh_entry_counter_update(struct mlxsw_sp *mlxsw_sp, 2514 struct mlxsw_sp_neigh_entry *neigh_entry, 2515 bool adding) 2516 { 2517 if (adding) 2518 mlxsw_sp_neigh_counter_alloc(mlxsw_sp, neigh_entry); 2519 else 2520 mlxsw_sp_neigh_counter_free(mlxsw_sp, neigh_entry); 2521 mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, true); 2522 } 2523 2524 struct mlxsw_sp_netevent_work { 2525 struct work_struct work; 2526 struct mlxsw_sp *mlxsw_sp; 2527 struct neighbour *n; 2528 }; 2529 2530 static void mlxsw_sp_router_neigh_event_work(struct work_struct *work) 2531 { 2532 struct mlxsw_sp_netevent_work *net_work = 2533 container_of(work, struct mlxsw_sp_netevent_work, work); 2534 struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp; 2535 struct mlxsw_sp_neigh_entry *neigh_entry; 2536 struct neighbour *n = net_work->n; 2537 unsigned char ha[ETH_ALEN]; 2538 bool entry_connected; 2539 u8 nud_state, dead; 2540 2541 /* If these parameters are changed after we release the lock, 2542 * then we are guaranteed to receive another event letting us 2543 * know about it. 2544 */ 2545 read_lock_bh(&n->lock); 2546 memcpy(ha, n->ha, ETH_ALEN); 2547 nud_state = n->nud_state; 2548 dead = n->dead; 2549 read_unlock_bh(&n->lock); 2550 2551 mutex_lock(&mlxsw_sp->router->lock); 2552 mlxsw_sp_span_respin(mlxsw_sp); 2553 2554 entry_connected = nud_state & NUD_VALID && !dead; 2555 neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n); 2556 if (!entry_connected && !neigh_entry) 2557 goto out; 2558 if (!neigh_entry) { 2559 neigh_entry = mlxsw_sp_neigh_entry_create(mlxsw_sp, n); 2560 if (IS_ERR(neigh_entry)) 2561 goto out; 2562 } 2563 2564 memcpy(neigh_entry->ha, ha, ETH_ALEN); 2565 mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, entry_connected); 2566 mlxsw_sp_nexthop_neigh_update(mlxsw_sp, neigh_entry, !entry_connected, 2567 dead); 2568 2569 if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list)) 2570 mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry); 2571 2572 out: 2573 mutex_unlock(&mlxsw_sp->router->lock); 2574 neigh_release(n); 2575 kfree(net_work); 2576 } 2577 2578 static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp); 2579 2580 static void mlxsw_sp_router_mp_hash_event_work(struct work_struct *work) 2581 { 2582 struct mlxsw_sp_netevent_work *net_work = 2583 container_of(work, struct mlxsw_sp_netevent_work, work); 2584 struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp; 2585 2586 mlxsw_sp_mp_hash_init(mlxsw_sp); 2587 kfree(net_work); 2588 } 2589 2590 static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp); 2591 2592 static void mlxsw_sp_router_update_priority_work(struct work_struct *work) 2593 { 2594 struct mlxsw_sp_netevent_work *net_work = 2595 container_of(work, struct mlxsw_sp_netevent_work, work); 2596 struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp; 2597 2598 __mlxsw_sp_router_init(mlxsw_sp); 2599 kfree(net_work); 2600 } 2601 2602 static int mlxsw_sp_router_schedule_work(struct net *net, 2603 struct notifier_block *nb, 2604 void (*cb)(struct work_struct *)) 2605 { 2606 struct mlxsw_sp_netevent_work *net_work; 2607 struct mlxsw_sp_router *router; 2608 2609 router = container_of(nb, struct mlxsw_sp_router, netevent_nb); 2610 if (!net_eq(net, mlxsw_sp_net(router->mlxsw_sp))) 2611 return NOTIFY_DONE; 2612 2613 net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC); 2614 if (!net_work) 2615 return NOTIFY_BAD; 2616 2617 INIT_WORK(&net_work->work, cb); 2618 net_work->mlxsw_sp = router->mlxsw_sp; 2619 mlxsw_core_schedule_work(&net_work->work); 2620 return NOTIFY_DONE; 2621 } 2622 2623 static int mlxsw_sp_router_netevent_event(struct notifier_block *nb, 2624 unsigned long event, void *ptr) 2625 { 2626 struct mlxsw_sp_netevent_work *net_work; 2627 struct mlxsw_sp_port *mlxsw_sp_port; 2628 struct mlxsw_sp *mlxsw_sp; 2629 unsigned long interval; 2630 struct neigh_parms *p; 2631 struct neighbour *n; 2632 2633 switch (event) { 2634 case NETEVENT_DELAY_PROBE_TIME_UPDATE: 2635 p = ptr; 2636 2637 /* We don't care about changes in the default table. */ 2638 if (!p->dev || (p->tbl->family != AF_INET && 2639 p->tbl->family != AF_INET6)) 2640 return NOTIFY_DONE; 2641 2642 /* We are in atomic context and can't take RTNL mutex, 2643 * so use RCU variant to walk the device chain. 2644 */ 2645 mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(p->dev); 2646 if (!mlxsw_sp_port) 2647 return NOTIFY_DONE; 2648 2649 mlxsw_sp = mlxsw_sp_port->mlxsw_sp; 2650 interval = jiffies_to_msecs(NEIGH_VAR(p, DELAY_PROBE_TIME)); 2651 mlxsw_sp->router->neighs_update.interval = interval; 2652 2653 mlxsw_sp_port_dev_put(mlxsw_sp_port); 2654 break; 2655 case NETEVENT_NEIGH_UPDATE: 2656 n = ptr; 2657 2658 if (n->tbl->family != AF_INET && n->tbl->family != AF_INET6) 2659 return NOTIFY_DONE; 2660 2661 mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(n->dev); 2662 if (!mlxsw_sp_port) 2663 return NOTIFY_DONE; 2664 2665 net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC); 2666 if (!net_work) { 2667 mlxsw_sp_port_dev_put(mlxsw_sp_port); 2668 return NOTIFY_BAD; 2669 } 2670 2671 INIT_WORK(&net_work->work, mlxsw_sp_router_neigh_event_work); 2672 net_work->mlxsw_sp = mlxsw_sp_port->mlxsw_sp; 2673 net_work->n = n; 2674 2675 /* Take a reference to ensure the neighbour won't be 2676 * destructed until we drop the reference in delayed 2677 * work. 2678 */ 2679 neigh_clone(n); 2680 mlxsw_core_schedule_work(&net_work->work); 2681 mlxsw_sp_port_dev_put(mlxsw_sp_port); 2682 break; 2683 case NETEVENT_IPV4_MPATH_HASH_UPDATE: 2684 case NETEVENT_IPV6_MPATH_HASH_UPDATE: 2685 return mlxsw_sp_router_schedule_work(ptr, nb, 2686 mlxsw_sp_router_mp_hash_event_work); 2687 2688 case NETEVENT_IPV4_FWD_UPDATE_PRIORITY_UPDATE: 2689 return mlxsw_sp_router_schedule_work(ptr, nb, 2690 mlxsw_sp_router_update_priority_work); 2691 } 2692 2693 return NOTIFY_DONE; 2694 } 2695 2696 static int mlxsw_sp_neigh_init(struct mlxsw_sp *mlxsw_sp) 2697 { 2698 int err; 2699 2700 err = rhashtable_init(&mlxsw_sp->router->neigh_ht, 2701 &mlxsw_sp_neigh_ht_params); 2702 if (err) 2703 return err; 2704 2705 /* Initialize the polling interval according to the default 2706 * table. 2707 */ 2708 mlxsw_sp_router_neighs_update_interval_init(mlxsw_sp); 2709 2710 /* Create the delayed works for the activity_update */ 2711 INIT_DELAYED_WORK(&mlxsw_sp->router->neighs_update.dw, 2712 mlxsw_sp_router_neighs_update_work); 2713 INIT_DELAYED_WORK(&mlxsw_sp->router->nexthop_probe_dw, 2714 mlxsw_sp_router_probe_unresolved_nexthops); 2715 mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw, 0); 2716 mlxsw_core_schedule_dw(&mlxsw_sp->router->nexthop_probe_dw, 0); 2717 return 0; 2718 } 2719 2720 static void mlxsw_sp_neigh_fini(struct mlxsw_sp *mlxsw_sp) 2721 { 2722 cancel_delayed_work_sync(&mlxsw_sp->router->neighs_update.dw); 2723 cancel_delayed_work_sync(&mlxsw_sp->router->nexthop_probe_dw); 2724 rhashtable_destroy(&mlxsw_sp->router->neigh_ht); 2725 } 2726 2727 static void mlxsw_sp_neigh_rif_gone_sync(struct mlxsw_sp *mlxsw_sp, 2728 struct mlxsw_sp_rif *rif) 2729 { 2730 struct mlxsw_sp_neigh_entry *neigh_entry, *tmp; 2731 2732 list_for_each_entry_safe(neigh_entry, tmp, &rif->neigh_list, 2733 rif_list_node) { 2734 mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, false); 2735 mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry); 2736 } 2737 } 2738 2739 enum mlxsw_sp_nexthop_type { 2740 MLXSW_SP_NEXTHOP_TYPE_ETH, 2741 MLXSW_SP_NEXTHOP_TYPE_IPIP, 2742 }; 2743 2744 struct mlxsw_sp_nexthop_key { 2745 struct fib_nh *fib_nh; 2746 }; 2747 2748 struct mlxsw_sp_nexthop { 2749 struct list_head neigh_list_node; /* member of neigh entry list */ 2750 struct list_head rif_list_node; 2751 struct list_head router_list_node; 2752 struct mlxsw_sp_nexthop_group *nh_grp; /* pointer back to the group 2753 * this belongs to 2754 */ 2755 struct rhash_head ht_node; 2756 struct mlxsw_sp_nexthop_key key; 2757 unsigned char gw_addr[sizeof(struct in6_addr)]; 2758 int ifindex; 2759 int nh_weight; 2760 int norm_nh_weight; 2761 int num_adj_entries; 2762 struct mlxsw_sp_rif *rif; 2763 u8 should_offload:1, /* set indicates this neigh is connected and 2764 * should be put to KVD linear area of this group. 2765 */ 2766 offloaded:1, /* set in case the neigh is actually put into 2767 * KVD linear area of this group. 2768 */ 2769 update:1; /* set indicates that MAC of this neigh should be 2770 * updated in HW 2771 */ 2772 enum mlxsw_sp_nexthop_type type; 2773 union { 2774 struct mlxsw_sp_neigh_entry *neigh_entry; 2775 struct mlxsw_sp_ipip_entry *ipip_entry; 2776 }; 2777 unsigned int counter_index; 2778 bool counter_valid; 2779 }; 2780 2781 struct mlxsw_sp_nexthop_group { 2782 void *priv; 2783 struct rhash_head ht_node; 2784 struct list_head fib_list; /* list of fib entries that use this group */ 2785 struct neigh_table *neigh_tbl; 2786 u8 adj_index_valid:1, 2787 gateway:1; /* routes using the group use a gateway */ 2788 u32 adj_index; 2789 u16 ecmp_size; 2790 u16 count; 2791 int sum_norm_weight; 2792 struct mlxsw_sp_nexthop nexthops[0]; 2793 #define nh_rif nexthops[0].rif 2794 }; 2795 2796 void mlxsw_sp_nexthop_counter_alloc(struct mlxsw_sp *mlxsw_sp, 2797 struct mlxsw_sp_nexthop *nh) 2798 { 2799 struct devlink *devlink; 2800 2801 devlink = priv_to_devlink(mlxsw_sp->core); 2802 if (!devlink_dpipe_table_counter_enabled(devlink, 2803 MLXSW_SP_DPIPE_TABLE_NAME_ADJ)) 2804 return; 2805 2806 if (mlxsw_sp_flow_counter_alloc(mlxsw_sp, &nh->counter_index)) 2807 return; 2808 2809 nh->counter_valid = true; 2810 } 2811 2812 void mlxsw_sp_nexthop_counter_free(struct mlxsw_sp *mlxsw_sp, 2813 struct mlxsw_sp_nexthop *nh) 2814 { 2815 if (!nh->counter_valid) 2816 return; 2817 mlxsw_sp_flow_counter_free(mlxsw_sp, nh->counter_index); 2818 nh->counter_valid = false; 2819 } 2820 2821 int mlxsw_sp_nexthop_counter_get(struct mlxsw_sp *mlxsw_sp, 2822 struct mlxsw_sp_nexthop *nh, u64 *p_counter) 2823 { 2824 if (!nh->counter_valid) 2825 return -EINVAL; 2826 2827 return mlxsw_sp_flow_counter_get(mlxsw_sp, nh->counter_index, 2828 p_counter, NULL); 2829 } 2830 2831 struct mlxsw_sp_nexthop *mlxsw_sp_nexthop_next(struct mlxsw_sp_router *router, 2832 struct mlxsw_sp_nexthop *nh) 2833 { 2834 if (!nh) { 2835 if (list_empty(&router->nexthop_list)) 2836 return NULL; 2837 else 2838 return list_first_entry(&router->nexthop_list, 2839 typeof(*nh), router_list_node); 2840 } 2841 if (list_is_last(&nh->router_list_node, &router->nexthop_list)) 2842 return NULL; 2843 return list_next_entry(nh, router_list_node); 2844 } 2845 2846 bool mlxsw_sp_nexthop_offload(struct mlxsw_sp_nexthop *nh) 2847 { 2848 return nh->offloaded; 2849 } 2850 2851 unsigned char *mlxsw_sp_nexthop_ha(struct mlxsw_sp_nexthop *nh) 2852 { 2853 if (!nh->offloaded) 2854 return NULL; 2855 return nh->neigh_entry->ha; 2856 } 2857 2858 int mlxsw_sp_nexthop_indexes(struct mlxsw_sp_nexthop *nh, u32 *p_adj_index, 2859 u32 *p_adj_size, u32 *p_adj_hash_index) 2860 { 2861 struct mlxsw_sp_nexthop_group *nh_grp = nh->nh_grp; 2862 u32 adj_hash_index = 0; 2863 int i; 2864 2865 if (!nh->offloaded || !nh_grp->adj_index_valid) 2866 return -EINVAL; 2867 2868 *p_adj_index = nh_grp->adj_index; 2869 *p_adj_size = nh_grp->ecmp_size; 2870 2871 for (i = 0; i < nh_grp->count; i++) { 2872 struct mlxsw_sp_nexthop *nh_iter = &nh_grp->nexthops[i]; 2873 2874 if (nh_iter == nh) 2875 break; 2876 if (nh_iter->offloaded) 2877 adj_hash_index += nh_iter->num_adj_entries; 2878 } 2879 2880 *p_adj_hash_index = adj_hash_index; 2881 return 0; 2882 } 2883 2884 struct mlxsw_sp_rif *mlxsw_sp_nexthop_rif(struct mlxsw_sp_nexthop *nh) 2885 { 2886 return nh->rif; 2887 } 2888 2889 bool mlxsw_sp_nexthop_group_has_ipip(struct mlxsw_sp_nexthop *nh) 2890 { 2891 struct mlxsw_sp_nexthop_group *nh_grp = nh->nh_grp; 2892 int i; 2893 2894 for (i = 0; i < nh_grp->count; i++) { 2895 struct mlxsw_sp_nexthop *nh_iter = &nh_grp->nexthops[i]; 2896 2897 if (nh_iter->type == MLXSW_SP_NEXTHOP_TYPE_IPIP) 2898 return true; 2899 } 2900 return false; 2901 } 2902 2903 static struct fib_info * 2904 mlxsw_sp_nexthop4_group_fi(const struct mlxsw_sp_nexthop_group *nh_grp) 2905 { 2906 return nh_grp->priv; 2907 } 2908 2909 struct mlxsw_sp_nexthop_group_cmp_arg { 2910 enum mlxsw_sp_l3proto proto; 2911 union { 2912 struct fib_info *fi; 2913 struct mlxsw_sp_fib6_entry *fib6_entry; 2914 }; 2915 }; 2916 2917 static bool 2918 mlxsw_sp_nexthop6_group_has_nexthop(const struct mlxsw_sp_nexthop_group *nh_grp, 2919 const struct in6_addr *gw, int ifindex, 2920 int weight) 2921 { 2922 int i; 2923 2924 for (i = 0; i < nh_grp->count; i++) { 2925 const struct mlxsw_sp_nexthop *nh; 2926 2927 nh = &nh_grp->nexthops[i]; 2928 if (nh->ifindex == ifindex && nh->nh_weight == weight && 2929 ipv6_addr_equal(gw, (struct in6_addr *) nh->gw_addr)) 2930 return true; 2931 } 2932 2933 return false; 2934 } 2935 2936 static bool 2937 mlxsw_sp_nexthop6_group_cmp(const struct mlxsw_sp_nexthop_group *nh_grp, 2938 const struct mlxsw_sp_fib6_entry *fib6_entry) 2939 { 2940 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 2941 2942 if (nh_grp->count != fib6_entry->nrt6) 2943 return false; 2944 2945 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 2946 struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh; 2947 struct in6_addr *gw; 2948 int ifindex, weight; 2949 2950 ifindex = fib6_nh->fib_nh_dev->ifindex; 2951 weight = fib6_nh->fib_nh_weight; 2952 gw = &fib6_nh->fib_nh_gw6; 2953 if (!mlxsw_sp_nexthop6_group_has_nexthop(nh_grp, gw, ifindex, 2954 weight)) 2955 return false; 2956 } 2957 2958 return true; 2959 } 2960 2961 static int 2962 mlxsw_sp_nexthop_group_cmp(struct rhashtable_compare_arg *arg, const void *ptr) 2963 { 2964 const struct mlxsw_sp_nexthop_group_cmp_arg *cmp_arg = arg->key; 2965 const struct mlxsw_sp_nexthop_group *nh_grp = ptr; 2966 2967 switch (cmp_arg->proto) { 2968 case MLXSW_SP_L3_PROTO_IPV4: 2969 return cmp_arg->fi != mlxsw_sp_nexthop4_group_fi(nh_grp); 2970 case MLXSW_SP_L3_PROTO_IPV6: 2971 return !mlxsw_sp_nexthop6_group_cmp(nh_grp, 2972 cmp_arg->fib6_entry); 2973 default: 2974 WARN_ON(1); 2975 return 1; 2976 } 2977 } 2978 2979 static int 2980 mlxsw_sp_nexthop_group_type(const struct mlxsw_sp_nexthop_group *nh_grp) 2981 { 2982 return nh_grp->neigh_tbl->family; 2983 } 2984 2985 static u32 mlxsw_sp_nexthop_group_hash_obj(const void *data, u32 len, u32 seed) 2986 { 2987 const struct mlxsw_sp_nexthop_group *nh_grp = data; 2988 const struct mlxsw_sp_nexthop *nh; 2989 struct fib_info *fi; 2990 unsigned int val; 2991 int i; 2992 2993 switch (mlxsw_sp_nexthop_group_type(nh_grp)) { 2994 case AF_INET: 2995 fi = mlxsw_sp_nexthop4_group_fi(nh_grp); 2996 return jhash(&fi, sizeof(fi), seed); 2997 case AF_INET6: 2998 val = nh_grp->count; 2999 for (i = 0; i < nh_grp->count; i++) { 3000 nh = &nh_grp->nexthops[i]; 3001 val ^= jhash(&nh->ifindex, sizeof(nh->ifindex), seed); 3002 val ^= jhash(&nh->gw_addr, sizeof(nh->gw_addr), seed); 3003 } 3004 return jhash(&val, sizeof(val), seed); 3005 default: 3006 WARN_ON(1); 3007 return 0; 3008 } 3009 } 3010 3011 static u32 3012 mlxsw_sp_nexthop6_group_hash(struct mlxsw_sp_fib6_entry *fib6_entry, u32 seed) 3013 { 3014 unsigned int val = fib6_entry->nrt6; 3015 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 3016 3017 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 3018 struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh; 3019 struct net_device *dev = fib6_nh->fib_nh_dev; 3020 struct in6_addr *gw = &fib6_nh->fib_nh_gw6; 3021 3022 val ^= jhash(&dev->ifindex, sizeof(dev->ifindex), seed); 3023 val ^= jhash(gw, sizeof(*gw), seed); 3024 } 3025 3026 return jhash(&val, sizeof(val), seed); 3027 } 3028 3029 static u32 3030 mlxsw_sp_nexthop_group_hash(const void *data, u32 len, u32 seed) 3031 { 3032 const struct mlxsw_sp_nexthop_group_cmp_arg *cmp_arg = data; 3033 3034 switch (cmp_arg->proto) { 3035 case MLXSW_SP_L3_PROTO_IPV4: 3036 return jhash(&cmp_arg->fi, sizeof(cmp_arg->fi), seed); 3037 case MLXSW_SP_L3_PROTO_IPV6: 3038 return mlxsw_sp_nexthop6_group_hash(cmp_arg->fib6_entry, seed); 3039 default: 3040 WARN_ON(1); 3041 return 0; 3042 } 3043 } 3044 3045 static const struct rhashtable_params mlxsw_sp_nexthop_group_ht_params = { 3046 .head_offset = offsetof(struct mlxsw_sp_nexthop_group, ht_node), 3047 .hashfn = mlxsw_sp_nexthop_group_hash, 3048 .obj_hashfn = mlxsw_sp_nexthop_group_hash_obj, 3049 .obj_cmpfn = mlxsw_sp_nexthop_group_cmp, 3050 }; 3051 3052 static int mlxsw_sp_nexthop_group_insert(struct mlxsw_sp *mlxsw_sp, 3053 struct mlxsw_sp_nexthop_group *nh_grp) 3054 { 3055 if (mlxsw_sp_nexthop_group_type(nh_grp) == AF_INET6 && 3056 !nh_grp->gateway) 3057 return 0; 3058 3059 return rhashtable_insert_fast(&mlxsw_sp->router->nexthop_group_ht, 3060 &nh_grp->ht_node, 3061 mlxsw_sp_nexthop_group_ht_params); 3062 } 3063 3064 static void mlxsw_sp_nexthop_group_remove(struct mlxsw_sp *mlxsw_sp, 3065 struct mlxsw_sp_nexthop_group *nh_grp) 3066 { 3067 if (mlxsw_sp_nexthop_group_type(nh_grp) == AF_INET6 && 3068 !nh_grp->gateway) 3069 return; 3070 3071 rhashtable_remove_fast(&mlxsw_sp->router->nexthop_group_ht, 3072 &nh_grp->ht_node, 3073 mlxsw_sp_nexthop_group_ht_params); 3074 } 3075 3076 static struct mlxsw_sp_nexthop_group * 3077 mlxsw_sp_nexthop4_group_lookup(struct mlxsw_sp *mlxsw_sp, 3078 struct fib_info *fi) 3079 { 3080 struct mlxsw_sp_nexthop_group_cmp_arg cmp_arg; 3081 3082 cmp_arg.proto = MLXSW_SP_L3_PROTO_IPV4; 3083 cmp_arg.fi = fi; 3084 return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht, 3085 &cmp_arg, 3086 mlxsw_sp_nexthop_group_ht_params); 3087 } 3088 3089 static struct mlxsw_sp_nexthop_group * 3090 mlxsw_sp_nexthop6_group_lookup(struct mlxsw_sp *mlxsw_sp, 3091 struct mlxsw_sp_fib6_entry *fib6_entry) 3092 { 3093 struct mlxsw_sp_nexthop_group_cmp_arg cmp_arg; 3094 3095 cmp_arg.proto = MLXSW_SP_L3_PROTO_IPV6; 3096 cmp_arg.fib6_entry = fib6_entry; 3097 return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht, 3098 &cmp_arg, 3099 mlxsw_sp_nexthop_group_ht_params); 3100 } 3101 3102 static const struct rhashtable_params mlxsw_sp_nexthop_ht_params = { 3103 .key_offset = offsetof(struct mlxsw_sp_nexthop, key), 3104 .head_offset = offsetof(struct mlxsw_sp_nexthop, ht_node), 3105 .key_len = sizeof(struct mlxsw_sp_nexthop_key), 3106 }; 3107 3108 static int mlxsw_sp_nexthop_insert(struct mlxsw_sp *mlxsw_sp, 3109 struct mlxsw_sp_nexthop *nh) 3110 { 3111 return rhashtable_insert_fast(&mlxsw_sp->router->nexthop_ht, 3112 &nh->ht_node, mlxsw_sp_nexthop_ht_params); 3113 } 3114 3115 static void mlxsw_sp_nexthop_remove(struct mlxsw_sp *mlxsw_sp, 3116 struct mlxsw_sp_nexthop *nh) 3117 { 3118 rhashtable_remove_fast(&mlxsw_sp->router->nexthop_ht, &nh->ht_node, 3119 mlxsw_sp_nexthop_ht_params); 3120 } 3121 3122 static struct mlxsw_sp_nexthop * 3123 mlxsw_sp_nexthop_lookup(struct mlxsw_sp *mlxsw_sp, 3124 struct mlxsw_sp_nexthop_key key) 3125 { 3126 return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_ht, &key, 3127 mlxsw_sp_nexthop_ht_params); 3128 } 3129 3130 static int mlxsw_sp_adj_index_mass_update_vr(struct mlxsw_sp *mlxsw_sp, 3131 const struct mlxsw_sp_fib *fib, 3132 u32 adj_index, u16 ecmp_size, 3133 u32 new_adj_index, 3134 u16 new_ecmp_size) 3135 { 3136 char raleu_pl[MLXSW_REG_RALEU_LEN]; 3137 3138 mlxsw_reg_raleu_pack(raleu_pl, 3139 (enum mlxsw_reg_ralxx_protocol) fib->proto, 3140 fib->vr->id, adj_index, ecmp_size, new_adj_index, 3141 new_ecmp_size); 3142 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raleu), raleu_pl); 3143 } 3144 3145 static int mlxsw_sp_adj_index_mass_update(struct mlxsw_sp *mlxsw_sp, 3146 struct mlxsw_sp_nexthop_group *nh_grp, 3147 u32 old_adj_index, u16 old_ecmp_size) 3148 { 3149 struct mlxsw_sp_fib_entry *fib_entry; 3150 struct mlxsw_sp_fib *fib = NULL; 3151 int err; 3152 3153 list_for_each_entry(fib_entry, &nh_grp->fib_list, nexthop_group_node) { 3154 if (fib == fib_entry->fib_node->fib) 3155 continue; 3156 fib = fib_entry->fib_node->fib; 3157 err = mlxsw_sp_adj_index_mass_update_vr(mlxsw_sp, fib, 3158 old_adj_index, 3159 old_ecmp_size, 3160 nh_grp->adj_index, 3161 nh_grp->ecmp_size); 3162 if (err) 3163 return err; 3164 } 3165 return 0; 3166 } 3167 3168 static int __mlxsw_sp_nexthop_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index, 3169 struct mlxsw_sp_nexthop *nh) 3170 { 3171 struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry; 3172 char ratr_pl[MLXSW_REG_RATR_LEN]; 3173 3174 mlxsw_reg_ratr_pack(ratr_pl, MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY, 3175 true, MLXSW_REG_RATR_TYPE_ETHERNET, 3176 adj_index, neigh_entry->rif); 3177 mlxsw_reg_ratr_eth_entry_pack(ratr_pl, neigh_entry->ha); 3178 if (nh->counter_valid) 3179 mlxsw_reg_ratr_counter_pack(ratr_pl, nh->counter_index, true); 3180 else 3181 mlxsw_reg_ratr_counter_pack(ratr_pl, 0, false); 3182 3183 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl); 3184 } 3185 3186 int mlxsw_sp_nexthop_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index, 3187 struct mlxsw_sp_nexthop *nh) 3188 { 3189 int i; 3190 3191 for (i = 0; i < nh->num_adj_entries; i++) { 3192 int err; 3193 3194 err = __mlxsw_sp_nexthop_update(mlxsw_sp, adj_index + i, nh); 3195 if (err) 3196 return err; 3197 } 3198 3199 return 0; 3200 } 3201 3202 static int __mlxsw_sp_nexthop_ipip_update(struct mlxsw_sp *mlxsw_sp, 3203 u32 adj_index, 3204 struct mlxsw_sp_nexthop *nh) 3205 { 3206 const struct mlxsw_sp_ipip_ops *ipip_ops; 3207 3208 ipip_ops = mlxsw_sp->router->ipip_ops_arr[nh->ipip_entry->ipipt]; 3209 return ipip_ops->nexthop_update(mlxsw_sp, adj_index, nh->ipip_entry); 3210 } 3211 3212 static int mlxsw_sp_nexthop_ipip_update(struct mlxsw_sp *mlxsw_sp, 3213 u32 adj_index, 3214 struct mlxsw_sp_nexthop *nh) 3215 { 3216 int i; 3217 3218 for (i = 0; i < nh->num_adj_entries; i++) { 3219 int err; 3220 3221 err = __mlxsw_sp_nexthop_ipip_update(mlxsw_sp, adj_index + i, 3222 nh); 3223 if (err) 3224 return err; 3225 } 3226 3227 return 0; 3228 } 3229 3230 static int 3231 mlxsw_sp_nexthop_group_update(struct mlxsw_sp *mlxsw_sp, 3232 struct mlxsw_sp_nexthop_group *nh_grp, 3233 bool reallocate) 3234 { 3235 u32 adj_index = nh_grp->adj_index; /* base */ 3236 struct mlxsw_sp_nexthop *nh; 3237 int i; 3238 3239 for (i = 0; i < nh_grp->count; i++) { 3240 nh = &nh_grp->nexthops[i]; 3241 3242 if (!nh->should_offload) { 3243 nh->offloaded = 0; 3244 continue; 3245 } 3246 3247 if (nh->update || reallocate) { 3248 int err = 0; 3249 3250 switch (nh->type) { 3251 case MLXSW_SP_NEXTHOP_TYPE_ETH: 3252 err = mlxsw_sp_nexthop_update 3253 (mlxsw_sp, adj_index, nh); 3254 break; 3255 case MLXSW_SP_NEXTHOP_TYPE_IPIP: 3256 err = mlxsw_sp_nexthop_ipip_update 3257 (mlxsw_sp, adj_index, nh); 3258 break; 3259 } 3260 if (err) 3261 return err; 3262 nh->update = 0; 3263 nh->offloaded = 1; 3264 } 3265 adj_index += nh->num_adj_entries; 3266 } 3267 return 0; 3268 } 3269 3270 static int 3271 mlxsw_sp_nexthop_fib_entries_update(struct mlxsw_sp *mlxsw_sp, 3272 struct mlxsw_sp_nexthop_group *nh_grp) 3273 { 3274 struct mlxsw_sp_fib_entry *fib_entry; 3275 int err; 3276 3277 list_for_each_entry(fib_entry, &nh_grp->fib_list, nexthop_group_node) { 3278 err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 3279 if (err) 3280 return err; 3281 } 3282 return 0; 3283 } 3284 3285 static void mlxsw_sp_adj_grp_size_round_up(u16 *p_adj_grp_size) 3286 { 3287 /* Valid sizes for an adjacency group are: 3288 * 1-64, 512, 1024, 2048 and 4096. 3289 */ 3290 if (*p_adj_grp_size <= 64) 3291 return; 3292 else if (*p_adj_grp_size <= 512) 3293 *p_adj_grp_size = 512; 3294 else if (*p_adj_grp_size <= 1024) 3295 *p_adj_grp_size = 1024; 3296 else if (*p_adj_grp_size <= 2048) 3297 *p_adj_grp_size = 2048; 3298 else 3299 *p_adj_grp_size = 4096; 3300 } 3301 3302 static void mlxsw_sp_adj_grp_size_round_down(u16 *p_adj_grp_size, 3303 unsigned int alloc_size) 3304 { 3305 if (alloc_size >= 4096) 3306 *p_adj_grp_size = 4096; 3307 else if (alloc_size >= 2048) 3308 *p_adj_grp_size = 2048; 3309 else if (alloc_size >= 1024) 3310 *p_adj_grp_size = 1024; 3311 else if (alloc_size >= 512) 3312 *p_adj_grp_size = 512; 3313 } 3314 3315 static int mlxsw_sp_fix_adj_grp_size(struct mlxsw_sp *mlxsw_sp, 3316 u16 *p_adj_grp_size) 3317 { 3318 unsigned int alloc_size; 3319 int err; 3320 3321 /* Round up the requested group size to the next size supported 3322 * by the device and make sure the request can be satisfied. 3323 */ 3324 mlxsw_sp_adj_grp_size_round_up(p_adj_grp_size); 3325 err = mlxsw_sp_kvdl_alloc_count_query(mlxsw_sp, 3326 MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 3327 *p_adj_grp_size, &alloc_size); 3328 if (err) 3329 return err; 3330 /* It is possible the allocation results in more allocated 3331 * entries than requested. Try to use as much of them as 3332 * possible. 3333 */ 3334 mlxsw_sp_adj_grp_size_round_down(p_adj_grp_size, alloc_size); 3335 3336 return 0; 3337 } 3338 3339 static void 3340 mlxsw_sp_nexthop_group_normalize(struct mlxsw_sp_nexthop_group *nh_grp) 3341 { 3342 int i, g = 0, sum_norm_weight = 0; 3343 struct mlxsw_sp_nexthop *nh; 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 if (g > 0) 3351 g = gcd(nh->nh_weight, g); 3352 else 3353 g = nh->nh_weight; 3354 } 3355 3356 for (i = 0; i < nh_grp->count; i++) { 3357 nh = &nh_grp->nexthops[i]; 3358 3359 if (!nh->should_offload) 3360 continue; 3361 nh->norm_nh_weight = nh->nh_weight / g; 3362 sum_norm_weight += nh->norm_nh_weight; 3363 } 3364 3365 nh_grp->sum_norm_weight = sum_norm_weight; 3366 } 3367 3368 static void 3369 mlxsw_sp_nexthop_group_rebalance(struct mlxsw_sp_nexthop_group *nh_grp) 3370 { 3371 int total = nh_grp->sum_norm_weight; 3372 u16 ecmp_size = nh_grp->ecmp_size; 3373 int i, weight = 0, lower_bound = 0; 3374 3375 for (i = 0; i < nh_grp->count; i++) { 3376 struct mlxsw_sp_nexthop *nh = &nh_grp->nexthops[i]; 3377 int upper_bound; 3378 3379 if (!nh->should_offload) 3380 continue; 3381 weight += nh->norm_nh_weight; 3382 upper_bound = DIV_ROUND_CLOSEST(ecmp_size * weight, total); 3383 nh->num_adj_entries = upper_bound - lower_bound; 3384 lower_bound = upper_bound; 3385 } 3386 } 3387 3388 static struct mlxsw_sp_nexthop * 3389 mlxsw_sp_rt6_nexthop(struct mlxsw_sp_nexthop_group *nh_grp, 3390 const struct mlxsw_sp_rt6 *mlxsw_sp_rt6); 3391 3392 static void 3393 mlxsw_sp_nexthop4_group_offload_refresh(struct mlxsw_sp *mlxsw_sp, 3394 struct mlxsw_sp_nexthop_group *nh_grp) 3395 { 3396 int i; 3397 3398 for (i = 0; i < nh_grp->count; i++) { 3399 struct mlxsw_sp_nexthop *nh = &nh_grp->nexthops[i]; 3400 3401 if (nh->offloaded) 3402 nh->key.fib_nh->fib_nh_flags |= RTNH_F_OFFLOAD; 3403 else 3404 nh->key.fib_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD; 3405 } 3406 } 3407 3408 static void 3409 __mlxsw_sp_nexthop6_group_offload_refresh(struct mlxsw_sp_nexthop_group *nh_grp, 3410 struct mlxsw_sp_fib6_entry *fib6_entry) 3411 { 3412 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 3413 3414 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 3415 struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh; 3416 struct mlxsw_sp_nexthop *nh; 3417 3418 nh = mlxsw_sp_rt6_nexthop(nh_grp, mlxsw_sp_rt6); 3419 if (nh && nh->offloaded) 3420 fib6_nh->fib_nh_flags |= RTNH_F_OFFLOAD; 3421 else 3422 fib6_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD; 3423 } 3424 } 3425 3426 static void 3427 mlxsw_sp_nexthop6_group_offload_refresh(struct mlxsw_sp *mlxsw_sp, 3428 struct mlxsw_sp_nexthop_group *nh_grp) 3429 { 3430 struct mlxsw_sp_fib6_entry *fib6_entry; 3431 3432 /* Unfortunately, in IPv6 the route and the nexthop are described by 3433 * the same struct, so we need to iterate over all the routes using the 3434 * nexthop group and set / clear the offload indication for them. 3435 */ 3436 list_for_each_entry(fib6_entry, &nh_grp->fib_list, 3437 common.nexthop_group_node) 3438 __mlxsw_sp_nexthop6_group_offload_refresh(nh_grp, fib6_entry); 3439 } 3440 3441 static void 3442 mlxsw_sp_nexthop_group_offload_refresh(struct mlxsw_sp *mlxsw_sp, 3443 struct mlxsw_sp_nexthop_group *nh_grp) 3444 { 3445 switch (mlxsw_sp_nexthop_group_type(nh_grp)) { 3446 case AF_INET: 3447 mlxsw_sp_nexthop4_group_offload_refresh(mlxsw_sp, nh_grp); 3448 break; 3449 case AF_INET6: 3450 mlxsw_sp_nexthop6_group_offload_refresh(mlxsw_sp, nh_grp); 3451 break; 3452 } 3453 } 3454 3455 static void 3456 mlxsw_sp_nexthop_group_refresh(struct mlxsw_sp *mlxsw_sp, 3457 struct mlxsw_sp_nexthop_group *nh_grp) 3458 { 3459 u16 ecmp_size, old_ecmp_size; 3460 struct mlxsw_sp_nexthop *nh; 3461 bool offload_change = false; 3462 u32 adj_index; 3463 bool old_adj_index_valid; 3464 u32 old_adj_index; 3465 int i; 3466 int err; 3467 3468 if (!nh_grp->gateway) { 3469 mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp); 3470 return; 3471 } 3472 3473 for (i = 0; i < nh_grp->count; i++) { 3474 nh = &nh_grp->nexthops[i]; 3475 3476 if (nh->should_offload != nh->offloaded) { 3477 offload_change = true; 3478 if (nh->should_offload) 3479 nh->update = 1; 3480 } 3481 } 3482 if (!offload_change) { 3483 /* Nothing was added or removed, so no need to reallocate. Just 3484 * update MAC on existing adjacency indexes. 3485 */ 3486 err = mlxsw_sp_nexthop_group_update(mlxsw_sp, nh_grp, false); 3487 if (err) { 3488 dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n"); 3489 goto set_trap; 3490 } 3491 return; 3492 } 3493 mlxsw_sp_nexthop_group_normalize(nh_grp); 3494 if (!nh_grp->sum_norm_weight) 3495 /* No neigh of this group is connected so we just set 3496 * the trap and let everthing flow through kernel. 3497 */ 3498 goto set_trap; 3499 3500 ecmp_size = nh_grp->sum_norm_weight; 3501 err = mlxsw_sp_fix_adj_grp_size(mlxsw_sp, &ecmp_size); 3502 if (err) 3503 /* No valid allocation size available. */ 3504 goto set_trap; 3505 3506 err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 3507 ecmp_size, &adj_index); 3508 if (err) { 3509 /* We ran out of KVD linear space, just set the 3510 * trap and let everything flow through kernel. 3511 */ 3512 dev_warn(mlxsw_sp->bus_info->dev, "Failed to allocate KVD linear area for nexthop group.\n"); 3513 goto set_trap; 3514 } 3515 old_adj_index_valid = nh_grp->adj_index_valid; 3516 old_adj_index = nh_grp->adj_index; 3517 old_ecmp_size = nh_grp->ecmp_size; 3518 nh_grp->adj_index_valid = 1; 3519 nh_grp->adj_index = adj_index; 3520 nh_grp->ecmp_size = ecmp_size; 3521 mlxsw_sp_nexthop_group_rebalance(nh_grp); 3522 err = mlxsw_sp_nexthop_group_update(mlxsw_sp, nh_grp, true); 3523 if (err) { 3524 dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n"); 3525 goto set_trap; 3526 } 3527 3528 mlxsw_sp_nexthop_group_offload_refresh(mlxsw_sp, nh_grp); 3529 3530 if (!old_adj_index_valid) { 3531 /* The trap was set for fib entries, so we have to call 3532 * fib entry update to unset it and use adjacency index. 3533 */ 3534 err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp); 3535 if (err) { 3536 dev_warn(mlxsw_sp->bus_info->dev, "Failed to add adjacency index to fib entries.\n"); 3537 goto set_trap; 3538 } 3539 return; 3540 } 3541 3542 err = mlxsw_sp_adj_index_mass_update(mlxsw_sp, nh_grp, 3543 old_adj_index, old_ecmp_size); 3544 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 3545 old_ecmp_size, old_adj_index); 3546 if (err) { 3547 dev_warn(mlxsw_sp->bus_info->dev, "Failed to mass-update adjacency index for nexthop group.\n"); 3548 goto set_trap; 3549 } 3550 3551 return; 3552 3553 set_trap: 3554 old_adj_index_valid = nh_grp->adj_index_valid; 3555 nh_grp->adj_index_valid = 0; 3556 for (i = 0; i < nh_grp->count; i++) { 3557 nh = &nh_grp->nexthops[i]; 3558 nh->offloaded = 0; 3559 } 3560 err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp); 3561 if (err) 3562 dev_warn(mlxsw_sp->bus_info->dev, "Failed to set traps for fib entries.\n"); 3563 mlxsw_sp_nexthop_group_offload_refresh(mlxsw_sp, nh_grp); 3564 if (old_adj_index_valid) 3565 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 3566 nh_grp->ecmp_size, nh_grp->adj_index); 3567 } 3568 3569 static void __mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp_nexthop *nh, 3570 bool removing) 3571 { 3572 if (!removing) 3573 nh->should_offload = 1; 3574 else 3575 nh->should_offload = 0; 3576 nh->update = 1; 3577 } 3578 3579 static int 3580 mlxsw_sp_nexthop_dead_neigh_replace(struct mlxsw_sp *mlxsw_sp, 3581 struct mlxsw_sp_neigh_entry *neigh_entry) 3582 { 3583 struct neighbour *n, *old_n = neigh_entry->key.n; 3584 struct mlxsw_sp_nexthop *nh; 3585 bool entry_connected; 3586 u8 nud_state, dead; 3587 int err; 3588 3589 nh = list_first_entry(&neigh_entry->nexthop_list, 3590 struct mlxsw_sp_nexthop, neigh_list_node); 3591 3592 n = neigh_lookup(nh->nh_grp->neigh_tbl, &nh->gw_addr, nh->rif->dev); 3593 if (!n) { 3594 n = neigh_create(nh->nh_grp->neigh_tbl, &nh->gw_addr, 3595 nh->rif->dev); 3596 if (IS_ERR(n)) 3597 return PTR_ERR(n); 3598 neigh_event_send(n, NULL); 3599 } 3600 3601 mlxsw_sp_neigh_entry_remove(mlxsw_sp, neigh_entry); 3602 neigh_entry->key.n = n; 3603 err = mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry); 3604 if (err) 3605 goto err_neigh_entry_insert; 3606 3607 read_lock_bh(&n->lock); 3608 nud_state = n->nud_state; 3609 dead = n->dead; 3610 read_unlock_bh(&n->lock); 3611 entry_connected = nud_state & NUD_VALID && !dead; 3612 3613 list_for_each_entry(nh, &neigh_entry->nexthop_list, 3614 neigh_list_node) { 3615 neigh_release(old_n); 3616 neigh_clone(n); 3617 __mlxsw_sp_nexthop_neigh_update(nh, !entry_connected); 3618 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp); 3619 } 3620 3621 neigh_release(n); 3622 3623 return 0; 3624 3625 err_neigh_entry_insert: 3626 neigh_entry->key.n = old_n; 3627 mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry); 3628 neigh_release(n); 3629 return err; 3630 } 3631 3632 static void 3633 mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp *mlxsw_sp, 3634 struct mlxsw_sp_neigh_entry *neigh_entry, 3635 bool removing, bool dead) 3636 { 3637 struct mlxsw_sp_nexthop *nh; 3638 3639 if (list_empty(&neigh_entry->nexthop_list)) 3640 return; 3641 3642 if (dead) { 3643 int err; 3644 3645 err = mlxsw_sp_nexthop_dead_neigh_replace(mlxsw_sp, 3646 neigh_entry); 3647 if (err) 3648 dev_err(mlxsw_sp->bus_info->dev, "Failed to replace dead neigh\n"); 3649 return; 3650 } 3651 3652 list_for_each_entry(nh, &neigh_entry->nexthop_list, 3653 neigh_list_node) { 3654 __mlxsw_sp_nexthop_neigh_update(nh, removing); 3655 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp); 3656 } 3657 } 3658 3659 static void mlxsw_sp_nexthop_rif_init(struct mlxsw_sp_nexthop *nh, 3660 struct mlxsw_sp_rif *rif) 3661 { 3662 if (nh->rif) 3663 return; 3664 3665 nh->rif = rif; 3666 list_add(&nh->rif_list_node, &rif->nexthop_list); 3667 } 3668 3669 static void mlxsw_sp_nexthop_rif_fini(struct mlxsw_sp_nexthop *nh) 3670 { 3671 if (!nh->rif) 3672 return; 3673 3674 list_del(&nh->rif_list_node); 3675 nh->rif = NULL; 3676 } 3677 3678 static int mlxsw_sp_nexthop_neigh_init(struct mlxsw_sp *mlxsw_sp, 3679 struct mlxsw_sp_nexthop *nh) 3680 { 3681 struct mlxsw_sp_neigh_entry *neigh_entry; 3682 struct neighbour *n; 3683 u8 nud_state, dead; 3684 int err; 3685 3686 if (!nh->nh_grp->gateway || nh->neigh_entry) 3687 return 0; 3688 3689 /* Take a reference of neigh here ensuring that neigh would 3690 * not be destructed before the nexthop entry is finished. 3691 * The reference is taken either in neigh_lookup() or 3692 * in neigh_create() in case n is not found. 3693 */ 3694 n = neigh_lookup(nh->nh_grp->neigh_tbl, &nh->gw_addr, nh->rif->dev); 3695 if (!n) { 3696 n = neigh_create(nh->nh_grp->neigh_tbl, &nh->gw_addr, 3697 nh->rif->dev); 3698 if (IS_ERR(n)) 3699 return PTR_ERR(n); 3700 neigh_event_send(n, NULL); 3701 } 3702 neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n); 3703 if (!neigh_entry) { 3704 neigh_entry = mlxsw_sp_neigh_entry_create(mlxsw_sp, n); 3705 if (IS_ERR(neigh_entry)) { 3706 err = -EINVAL; 3707 goto err_neigh_entry_create; 3708 } 3709 } 3710 3711 /* If that is the first nexthop connected to that neigh, add to 3712 * nexthop_neighs_list 3713 */ 3714 if (list_empty(&neigh_entry->nexthop_list)) 3715 list_add_tail(&neigh_entry->nexthop_neighs_list_node, 3716 &mlxsw_sp->router->nexthop_neighs_list); 3717 3718 nh->neigh_entry = neigh_entry; 3719 list_add_tail(&nh->neigh_list_node, &neigh_entry->nexthop_list); 3720 read_lock_bh(&n->lock); 3721 nud_state = n->nud_state; 3722 dead = n->dead; 3723 read_unlock_bh(&n->lock); 3724 __mlxsw_sp_nexthop_neigh_update(nh, !(nud_state & NUD_VALID && !dead)); 3725 3726 return 0; 3727 3728 err_neigh_entry_create: 3729 neigh_release(n); 3730 return err; 3731 } 3732 3733 static void mlxsw_sp_nexthop_neigh_fini(struct mlxsw_sp *mlxsw_sp, 3734 struct mlxsw_sp_nexthop *nh) 3735 { 3736 struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry; 3737 struct neighbour *n; 3738 3739 if (!neigh_entry) 3740 return; 3741 n = neigh_entry->key.n; 3742 3743 __mlxsw_sp_nexthop_neigh_update(nh, true); 3744 list_del(&nh->neigh_list_node); 3745 nh->neigh_entry = NULL; 3746 3747 /* If that is the last nexthop connected to that neigh, remove from 3748 * nexthop_neighs_list 3749 */ 3750 if (list_empty(&neigh_entry->nexthop_list)) 3751 list_del(&neigh_entry->nexthop_neighs_list_node); 3752 3753 if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list)) 3754 mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry); 3755 3756 neigh_release(n); 3757 } 3758 3759 static bool mlxsw_sp_ipip_netdev_ul_up(struct net_device *ol_dev) 3760 { 3761 struct net_device *ul_dev; 3762 bool is_up; 3763 3764 rcu_read_lock(); 3765 ul_dev = __mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev); 3766 is_up = ul_dev ? (ul_dev->flags & IFF_UP) : true; 3767 rcu_read_unlock(); 3768 3769 return is_up; 3770 } 3771 3772 static void mlxsw_sp_nexthop_ipip_init(struct mlxsw_sp *mlxsw_sp, 3773 struct mlxsw_sp_nexthop *nh, 3774 struct mlxsw_sp_ipip_entry *ipip_entry) 3775 { 3776 bool removing; 3777 3778 if (!nh->nh_grp->gateway || nh->ipip_entry) 3779 return; 3780 3781 nh->ipip_entry = ipip_entry; 3782 removing = !mlxsw_sp_ipip_netdev_ul_up(ipip_entry->ol_dev); 3783 __mlxsw_sp_nexthop_neigh_update(nh, removing); 3784 mlxsw_sp_nexthop_rif_init(nh, &ipip_entry->ol_lb->common); 3785 } 3786 3787 static void mlxsw_sp_nexthop_ipip_fini(struct mlxsw_sp *mlxsw_sp, 3788 struct mlxsw_sp_nexthop *nh) 3789 { 3790 struct mlxsw_sp_ipip_entry *ipip_entry = nh->ipip_entry; 3791 3792 if (!ipip_entry) 3793 return; 3794 3795 __mlxsw_sp_nexthop_neigh_update(nh, true); 3796 nh->ipip_entry = NULL; 3797 } 3798 3799 static bool mlxsw_sp_nexthop4_ipip_type(const struct mlxsw_sp *mlxsw_sp, 3800 const struct fib_nh *fib_nh, 3801 enum mlxsw_sp_ipip_type *p_ipipt) 3802 { 3803 struct net_device *dev = fib_nh->fib_nh_dev; 3804 3805 return dev && 3806 fib_nh->nh_parent->fib_type == RTN_UNICAST && 3807 mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, p_ipipt); 3808 } 3809 3810 static void mlxsw_sp_nexthop_type_fini(struct mlxsw_sp *mlxsw_sp, 3811 struct mlxsw_sp_nexthop *nh) 3812 { 3813 switch (nh->type) { 3814 case MLXSW_SP_NEXTHOP_TYPE_ETH: 3815 mlxsw_sp_nexthop_neigh_fini(mlxsw_sp, nh); 3816 mlxsw_sp_nexthop_rif_fini(nh); 3817 break; 3818 case MLXSW_SP_NEXTHOP_TYPE_IPIP: 3819 mlxsw_sp_nexthop_rif_fini(nh); 3820 mlxsw_sp_nexthop_ipip_fini(mlxsw_sp, nh); 3821 break; 3822 } 3823 } 3824 3825 static int mlxsw_sp_nexthop4_type_init(struct mlxsw_sp *mlxsw_sp, 3826 struct mlxsw_sp_nexthop *nh, 3827 struct fib_nh *fib_nh) 3828 { 3829 const struct mlxsw_sp_ipip_ops *ipip_ops; 3830 struct net_device *dev = fib_nh->fib_nh_dev; 3831 struct mlxsw_sp_ipip_entry *ipip_entry; 3832 struct mlxsw_sp_rif *rif; 3833 int err; 3834 3835 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev); 3836 if (ipip_entry) { 3837 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 3838 if (ipip_ops->can_offload(mlxsw_sp, dev, 3839 MLXSW_SP_L3_PROTO_IPV4)) { 3840 nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP; 3841 mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry); 3842 return 0; 3843 } 3844 } 3845 3846 nh->type = MLXSW_SP_NEXTHOP_TYPE_ETH; 3847 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 3848 if (!rif) 3849 return 0; 3850 3851 mlxsw_sp_nexthop_rif_init(nh, rif); 3852 err = mlxsw_sp_nexthop_neigh_init(mlxsw_sp, nh); 3853 if (err) 3854 goto err_neigh_init; 3855 3856 return 0; 3857 3858 err_neigh_init: 3859 mlxsw_sp_nexthop_rif_fini(nh); 3860 return err; 3861 } 3862 3863 static void mlxsw_sp_nexthop4_type_fini(struct mlxsw_sp *mlxsw_sp, 3864 struct mlxsw_sp_nexthop *nh) 3865 { 3866 mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); 3867 } 3868 3869 static int mlxsw_sp_nexthop4_init(struct mlxsw_sp *mlxsw_sp, 3870 struct mlxsw_sp_nexthop_group *nh_grp, 3871 struct mlxsw_sp_nexthop *nh, 3872 struct fib_nh *fib_nh) 3873 { 3874 struct net_device *dev = fib_nh->fib_nh_dev; 3875 struct in_device *in_dev; 3876 int err; 3877 3878 nh->nh_grp = nh_grp; 3879 nh->key.fib_nh = fib_nh; 3880 #ifdef CONFIG_IP_ROUTE_MULTIPATH 3881 nh->nh_weight = fib_nh->fib_nh_weight; 3882 #else 3883 nh->nh_weight = 1; 3884 #endif 3885 memcpy(&nh->gw_addr, &fib_nh->fib_nh_gw4, sizeof(fib_nh->fib_nh_gw4)); 3886 err = mlxsw_sp_nexthop_insert(mlxsw_sp, nh); 3887 if (err) 3888 return err; 3889 3890 mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh); 3891 list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list); 3892 3893 if (!dev) 3894 return 0; 3895 3896 rcu_read_lock(); 3897 in_dev = __in_dev_get_rcu(dev); 3898 if (in_dev && IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) && 3899 fib_nh->fib_nh_flags & RTNH_F_LINKDOWN) { 3900 rcu_read_unlock(); 3901 return 0; 3902 } 3903 rcu_read_unlock(); 3904 3905 err = mlxsw_sp_nexthop4_type_init(mlxsw_sp, nh, fib_nh); 3906 if (err) 3907 goto err_nexthop_neigh_init; 3908 3909 return 0; 3910 3911 err_nexthop_neigh_init: 3912 mlxsw_sp_nexthop_remove(mlxsw_sp, nh); 3913 return err; 3914 } 3915 3916 static void mlxsw_sp_nexthop4_fini(struct mlxsw_sp *mlxsw_sp, 3917 struct mlxsw_sp_nexthop *nh) 3918 { 3919 mlxsw_sp_nexthop4_type_fini(mlxsw_sp, nh); 3920 list_del(&nh->router_list_node); 3921 mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh); 3922 mlxsw_sp_nexthop_remove(mlxsw_sp, nh); 3923 } 3924 3925 static void mlxsw_sp_nexthop4_event(struct mlxsw_sp *mlxsw_sp, 3926 unsigned long event, struct fib_nh *fib_nh) 3927 { 3928 struct mlxsw_sp_nexthop_key key; 3929 struct mlxsw_sp_nexthop *nh; 3930 3931 if (mlxsw_sp->router->aborted) 3932 return; 3933 3934 key.fib_nh = fib_nh; 3935 nh = mlxsw_sp_nexthop_lookup(mlxsw_sp, key); 3936 if (!nh) 3937 return; 3938 3939 switch (event) { 3940 case FIB_EVENT_NH_ADD: 3941 mlxsw_sp_nexthop4_type_init(mlxsw_sp, nh, fib_nh); 3942 break; 3943 case FIB_EVENT_NH_DEL: 3944 mlxsw_sp_nexthop4_type_fini(mlxsw_sp, nh); 3945 break; 3946 } 3947 3948 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp); 3949 } 3950 3951 static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp, 3952 struct mlxsw_sp_rif *rif) 3953 { 3954 struct mlxsw_sp_nexthop *nh; 3955 bool removing; 3956 3957 list_for_each_entry(nh, &rif->nexthop_list, rif_list_node) { 3958 switch (nh->type) { 3959 case MLXSW_SP_NEXTHOP_TYPE_ETH: 3960 removing = false; 3961 break; 3962 case MLXSW_SP_NEXTHOP_TYPE_IPIP: 3963 removing = !mlxsw_sp_ipip_netdev_ul_up(rif->dev); 3964 break; 3965 default: 3966 WARN_ON(1); 3967 continue; 3968 } 3969 3970 __mlxsw_sp_nexthop_neigh_update(nh, removing); 3971 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp); 3972 } 3973 } 3974 3975 static void mlxsw_sp_nexthop_rif_migrate(struct mlxsw_sp *mlxsw_sp, 3976 struct mlxsw_sp_rif *old_rif, 3977 struct mlxsw_sp_rif *new_rif) 3978 { 3979 struct mlxsw_sp_nexthop *nh; 3980 3981 list_splice_init(&old_rif->nexthop_list, &new_rif->nexthop_list); 3982 list_for_each_entry(nh, &new_rif->nexthop_list, rif_list_node) 3983 nh->rif = new_rif; 3984 mlxsw_sp_nexthop_rif_update(mlxsw_sp, new_rif); 3985 } 3986 3987 static void mlxsw_sp_nexthop_rif_gone_sync(struct mlxsw_sp *mlxsw_sp, 3988 struct mlxsw_sp_rif *rif) 3989 { 3990 struct mlxsw_sp_nexthop *nh, *tmp; 3991 3992 list_for_each_entry_safe(nh, tmp, &rif->nexthop_list, rif_list_node) { 3993 mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); 3994 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp); 3995 } 3996 } 3997 3998 static bool mlxsw_sp_fi_is_gateway(const struct mlxsw_sp *mlxsw_sp, 3999 struct fib_info *fi) 4000 { 4001 const struct fib_nh *nh = fib_info_nh(fi, 0); 4002 4003 return nh->fib_nh_scope == RT_SCOPE_LINK || 4004 mlxsw_sp_nexthop4_ipip_type(mlxsw_sp, nh, NULL); 4005 } 4006 4007 static struct mlxsw_sp_nexthop_group * 4008 mlxsw_sp_nexthop4_group_create(struct mlxsw_sp *mlxsw_sp, struct fib_info *fi) 4009 { 4010 unsigned int nhs = fib_info_num_path(fi); 4011 struct mlxsw_sp_nexthop_group *nh_grp; 4012 struct mlxsw_sp_nexthop *nh; 4013 struct fib_nh *fib_nh; 4014 int i; 4015 int err; 4016 4017 nh_grp = kzalloc(struct_size(nh_grp, nexthops, nhs), GFP_KERNEL); 4018 if (!nh_grp) 4019 return ERR_PTR(-ENOMEM); 4020 nh_grp->priv = fi; 4021 INIT_LIST_HEAD(&nh_grp->fib_list); 4022 nh_grp->neigh_tbl = &arp_tbl; 4023 4024 nh_grp->gateway = mlxsw_sp_fi_is_gateway(mlxsw_sp, fi); 4025 nh_grp->count = nhs; 4026 fib_info_hold(fi); 4027 for (i = 0; i < nh_grp->count; i++) { 4028 nh = &nh_grp->nexthops[i]; 4029 fib_nh = fib_info_nh(fi, i); 4030 err = mlxsw_sp_nexthop4_init(mlxsw_sp, nh_grp, nh, fib_nh); 4031 if (err) 4032 goto err_nexthop4_init; 4033 } 4034 err = mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp); 4035 if (err) 4036 goto err_nexthop_group_insert; 4037 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 4038 return nh_grp; 4039 4040 err_nexthop_group_insert: 4041 err_nexthop4_init: 4042 for (i--; i >= 0; i--) { 4043 nh = &nh_grp->nexthops[i]; 4044 mlxsw_sp_nexthop4_fini(mlxsw_sp, nh); 4045 } 4046 fib_info_put(fi); 4047 kfree(nh_grp); 4048 return ERR_PTR(err); 4049 } 4050 4051 static void 4052 mlxsw_sp_nexthop4_group_destroy(struct mlxsw_sp *mlxsw_sp, 4053 struct mlxsw_sp_nexthop_group *nh_grp) 4054 { 4055 struct mlxsw_sp_nexthop *nh; 4056 int i; 4057 4058 mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp); 4059 for (i = 0; i < nh_grp->count; i++) { 4060 nh = &nh_grp->nexthops[i]; 4061 mlxsw_sp_nexthop4_fini(mlxsw_sp, nh); 4062 } 4063 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 4064 WARN_ON_ONCE(nh_grp->adj_index_valid); 4065 fib_info_put(mlxsw_sp_nexthop4_group_fi(nh_grp)); 4066 kfree(nh_grp); 4067 } 4068 4069 static int mlxsw_sp_nexthop4_group_get(struct mlxsw_sp *mlxsw_sp, 4070 struct mlxsw_sp_fib_entry *fib_entry, 4071 struct fib_info *fi) 4072 { 4073 struct mlxsw_sp_nexthop_group *nh_grp; 4074 4075 nh_grp = mlxsw_sp_nexthop4_group_lookup(mlxsw_sp, fi); 4076 if (!nh_grp) { 4077 nh_grp = mlxsw_sp_nexthop4_group_create(mlxsw_sp, fi); 4078 if (IS_ERR(nh_grp)) 4079 return PTR_ERR(nh_grp); 4080 } 4081 list_add_tail(&fib_entry->nexthop_group_node, &nh_grp->fib_list); 4082 fib_entry->nh_group = nh_grp; 4083 return 0; 4084 } 4085 4086 static void mlxsw_sp_nexthop4_group_put(struct mlxsw_sp *mlxsw_sp, 4087 struct mlxsw_sp_fib_entry *fib_entry) 4088 { 4089 struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 4090 4091 list_del(&fib_entry->nexthop_group_node); 4092 if (!list_empty(&nh_grp->fib_list)) 4093 return; 4094 mlxsw_sp_nexthop4_group_destroy(mlxsw_sp, nh_grp); 4095 } 4096 4097 static bool 4098 mlxsw_sp_fib4_entry_should_offload(const struct mlxsw_sp_fib_entry *fib_entry) 4099 { 4100 struct mlxsw_sp_fib4_entry *fib4_entry; 4101 4102 fib4_entry = container_of(fib_entry, struct mlxsw_sp_fib4_entry, 4103 common); 4104 return !fib4_entry->tos; 4105 } 4106 4107 static bool 4108 mlxsw_sp_fib_entry_should_offload(const struct mlxsw_sp_fib_entry *fib_entry) 4109 { 4110 struct mlxsw_sp_nexthop_group *nh_group = fib_entry->nh_group; 4111 4112 switch (fib_entry->fib_node->fib->proto) { 4113 case MLXSW_SP_L3_PROTO_IPV4: 4114 if (!mlxsw_sp_fib4_entry_should_offload(fib_entry)) 4115 return false; 4116 break; 4117 case MLXSW_SP_L3_PROTO_IPV6: 4118 break; 4119 } 4120 4121 switch (fib_entry->type) { 4122 case MLXSW_SP_FIB_ENTRY_TYPE_REMOTE: 4123 return !!nh_group->adj_index_valid; 4124 case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL: 4125 return !!nh_group->nh_rif; 4126 case MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE: 4127 case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP: 4128 case MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP: 4129 return true; 4130 default: 4131 return false; 4132 } 4133 } 4134 4135 static struct mlxsw_sp_nexthop * 4136 mlxsw_sp_rt6_nexthop(struct mlxsw_sp_nexthop_group *nh_grp, 4137 const struct mlxsw_sp_rt6 *mlxsw_sp_rt6) 4138 { 4139 int i; 4140 4141 for (i = 0; i < nh_grp->count; i++) { 4142 struct mlxsw_sp_nexthop *nh = &nh_grp->nexthops[i]; 4143 struct fib6_info *rt = mlxsw_sp_rt6->rt; 4144 4145 if (nh->rif && nh->rif->dev == rt->fib6_nh->fib_nh_dev && 4146 ipv6_addr_equal((const struct in6_addr *) &nh->gw_addr, 4147 &rt->fib6_nh->fib_nh_gw6)) 4148 return nh; 4149 continue; 4150 } 4151 4152 return NULL; 4153 } 4154 4155 static void 4156 mlxsw_sp_fib4_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp, 4157 struct mlxsw_sp_fib_entry *fib_entry) 4158 { 4159 struct fib_info *fi = mlxsw_sp_nexthop4_group_fi(fib_entry->nh_group); 4160 u32 *p_dst = (u32 *) fib_entry->fib_node->key.addr; 4161 int dst_len = fib_entry->fib_node->key.prefix_len; 4162 struct mlxsw_sp_fib4_entry *fib4_entry; 4163 struct fib_rt_info fri; 4164 bool should_offload; 4165 4166 should_offload = mlxsw_sp_fib_entry_should_offload(fib_entry); 4167 fib4_entry = container_of(fib_entry, struct mlxsw_sp_fib4_entry, 4168 common); 4169 fri.fi = fi; 4170 fri.tb_id = fib4_entry->tb_id; 4171 fri.dst = cpu_to_be32(*p_dst); 4172 fri.dst_len = dst_len; 4173 fri.tos = fib4_entry->tos; 4174 fri.type = fib4_entry->type; 4175 fri.offload = should_offload; 4176 fri.trap = !should_offload; 4177 fib_alias_hw_flags_set(mlxsw_sp_net(mlxsw_sp), &fri); 4178 } 4179 4180 static void 4181 mlxsw_sp_fib4_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp, 4182 struct mlxsw_sp_fib_entry *fib_entry) 4183 { 4184 struct fib_info *fi = mlxsw_sp_nexthop4_group_fi(fib_entry->nh_group); 4185 u32 *p_dst = (u32 *) fib_entry->fib_node->key.addr; 4186 int dst_len = fib_entry->fib_node->key.prefix_len; 4187 struct mlxsw_sp_fib4_entry *fib4_entry; 4188 struct fib_rt_info fri; 4189 4190 fib4_entry = container_of(fib_entry, struct mlxsw_sp_fib4_entry, 4191 common); 4192 fri.fi = fi; 4193 fri.tb_id = fib4_entry->tb_id; 4194 fri.dst = cpu_to_be32(*p_dst); 4195 fri.dst_len = dst_len; 4196 fri.tos = fib4_entry->tos; 4197 fri.type = fib4_entry->type; 4198 fri.offload = false; 4199 fri.trap = false; 4200 fib_alias_hw_flags_set(mlxsw_sp_net(mlxsw_sp), &fri); 4201 } 4202 4203 static void 4204 mlxsw_sp_fib6_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp, 4205 struct mlxsw_sp_fib_entry *fib_entry) 4206 { 4207 struct mlxsw_sp_fib6_entry *fib6_entry; 4208 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 4209 bool should_offload; 4210 4211 should_offload = mlxsw_sp_fib_entry_should_offload(fib_entry); 4212 4213 /* In IPv6 a multipath route is represented using multiple routes, so 4214 * we need to set the flags on all of them. 4215 */ 4216 fib6_entry = container_of(fib_entry, struct mlxsw_sp_fib6_entry, 4217 common); 4218 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) 4219 fib6_info_hw_flags_set(mlxsw_sp_rt6->rt, should_offload, 4220 !should_offload); 4221 } 4222 4223 static void 4224 mlxsw_sp_fib6_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp, 4225 struct mlxsw_sp_fib_entry *fib_entry) 4226 { 4227 struct mlxsw_sp_fib6_entry *fib6_entry; 4228 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 4229 4230 fib6_entry = container_of(fib_entry, struct mlxsw_sp_fib6_entry, 4231 common); 4232 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) 4233 fib6_info_hw_flags_set(mlxsw_sp_rt6->rt, false, false); 4234 } 4235 4236 static void 4237 mlxsw_sp_fib_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp, 4238 struct mlxsw_sp_fib_entry *fib_entry) 4239 { 4240 switch (fib_entry->fib_node->fib->proto) { 4241 case MLXSW_SP_L3_PROTO_IPV4: 4242 mlxsw_sp_fib4_entry_hw_flags_set(mlxsw_sp, fib_entry); 4243 break; 4244 case MLXSW_SP_L3_PROTO_IPV6: 4245 mlxsw_sp_fib6_entry_hw_flags_set(mlxsw_sp, fib_entry); 4246 break; 4247 } 4248 } 4249 4250 static void 4251 mlxsw_sp_fib_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp, 4252 struct mlxsw_sp_fib_entry *fib_entry) 4253 { 4254 switch (fib_entry->fib_node->fib->proto) { 4255 case MLXSW_SP_L3_PROTO_IPV4: 4256 mlxsw_sp_fib4_entry_hw_flags_clear(mlxsw_sp, fib_entry); 4257 break; 4258 case MLXSW_SP_L3_PROTO_IPV6: 4259 mlxsw_sp_fib6_entry_hw_flags_clear(mlxsw_sp, fib_entry); 4260 break; 4261 } 4262 } 4263 4264 static void 4265 mlxsw_sp_fib_entry_hw_flags_refresh(struct mlxsw_sp *mlxsw_sp, 4266 struct mlxsw_sp_fib_entry *fib_entry, 4267 enum mlxsw_reg_ralue_op op) 4268 { 4269 switch (op) { 4270 case MLXSW_REG_RALUE_OP_WRITE_WRITE: 4271 mlxsw_sp_fib_entry_hw_flags_set(mlxsw_sp, fib_entry); 4272 break; 4273 case MLXSW_REG_RALUE_OP_WRITE_DELETE: 4274 mlxsw_sp_fib_entry_hw_flags_clear(mlxsw_sp, fib_entry); 4275 break; 4276 default: 4277 break; 4278 } 4279 } 4280 4281 static void 4282 mlxsw_sp_fib_entry_ralue_pack(char *ralue_pl, 4283 const struct mlxsw_sp_fib_entry *fib_entry, 4284 enum mlxsw_reg_ralue_op op) 4285 { 4286 struct mlxsw_sp_fib *fib = fib_entry->fib_node->fib; 4287 enum mlxsw_reg_ralxx_protocol proto; 4288 u32 *p_dip; 4289 4290 proto = (enum mlxsw_reg_ralxx_protocol) fib->proto; 4291 4292 switch (fib->proto) { 4293 case MLXSW_SP_L3_PROTO_IPV4: 4294 p_dip = (u32 *) fib_entry->fib_node->key.addr; 4295 mlxsw_reg_ralue_pack4(ralue_pl, proto, op, fib->vr->id, 4296 fib_entry->fib_node->key.prefix_len, 4297 *p_dip); 4298 break; 4299 case MLXSW_SP_L3_PROTO_IPV6: 4300 mlxsw_reg_ralue_pack6(ralue_pl, proto, op, fib->vr->id, 4301 fib_entry->fib_node->key.prefix_len, 4302 fib_entry->fib_node->key.addr); 4303 break; 4304 } 4305 } 4306 4307 static int mlxsw_sp_adj_discard_write(struct mlxsw_sp *mlxsw_sp, u16 rif_index) 4308 { 4309 enum mlxsw_reg_ratr_trap_action trap_action; 4310 char ratr_pl[MLXSW_REG_RATR_LEN]; 4311 int err; 4312 4313 if (mlxsw_sp->router->adj_discard_index_valid) 4314 return 0; 4315 4316 err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1, 4317 &mlxsw_sp->router->adj_discard_index); 4318 if (err) 4319 return err; 4320 4321 trap_action = MLXSW_REG_RATR_TRAP_ACTION_DISCARD_ERRORS; 4322 mlxsw_reg_ratr_pack(ratr_pl, MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY, true, 4323 MLXSW_REG_RATR_TYPE_ETHERNET, 4324 mlxsw_sp->router->adj_discard_index, rif_index); 4325 mlxsw_reg_ratr_trap_action_set(ratr_pl, trap_action); 4326 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl); 4327 if (err) 4328 goto err_ratr_write; 4329 4330 mlxsw_sp->router->adj_discard_index_valid = true; 4331 4332 return 0; 4333 4334 err_ratr_write: 4335 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1, 4336 mlxsw_sp->router->adj_discard_index); 4337 return err; 4338 } 4339 4340 static int mlxsw_sp_fib_entry_op_remote(struct mlxsw_sp *mlxsw_sp, 4341 struct mlxsw_sp_fib_entry *fib_entry, 4342 enum mlxsw_reg_ralue_op op) 4343 { 4344 struct mlxsw_sp_nexthop_group *nh_group = fib_entry->nh_group; 4345 char ralue_pl[MLXSW_REG_RALUE_LEN]; 4346 enum mlxsw_reg_ralue_trap_action trap_action; 4347 u16 trap_id = 0; 4348 u32 adjacency_index = 0; 4349 u16 ecmp_size = 0; 4350 int err; 4351 4352 /* In case the nexthop group adjacency index is valid, use it 4353 * with provided ECMP size. Otherwise, setup trap and pass 4354 * traffic to kernel. 4355 */ 4356 if (mlxsw_sp_fib_entry_should_offload(fib_entry)) { 4357 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP; 4358 adjacency_index = fib_entry->nh_group->adj_index; 4359 ecmp_size = fib_entry->nh_group->ecmp_size; 4360 } else if (!nh_group->adj_index_valid && nh_group->count && 4361 nh_group->nh_rif) { 4362 err = mlxsw_sp_adj_discard_write(mlxsw_sp, 4363 nh_group->nh_rif->rif_index); 4364 if (err) 4365 return err; 4366 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP; 4367 adjacency_index = mlxsw_sp->router->adj_discard_index; 4368 ecmp_size = 1; 4369 } else { 4370 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP; 4371 trap_id = MLXSW_TRAP_ID_RTR_INGRESS0; 4372 } 4373 4374 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 4375 mlxsw_reg_ralue_act_remote_pack(ralue_pl, trap_action, trap_id, 4376 adjacency_index, ecmp_size); 4377 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 4378 } 4379 4380 static int mlxsw_sp_fib_entry_op_local(struct mlxsw_sp *mlxsw_sp, 4381 struct mlxsw_sp_fib_entry *fib_entry, 4382 enum mlxsw_reg_ralue_op op) 4383 { 4384 struct mlxsw_sp_rif *rif = fib_entry->nh_group->nh_rif; 4385 enum mlxsw_reg_ralue_trap_action trap_action; 4386 char ralue_pl[MLXSW_REG_RALUE_LEN]; 4387 u16 trap_id = 0; 4388 u16 rif_index = 0; 4389 4390 if (mlxsw_sp_fib_entry_should_offload(fib_entry)) { 4391 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP; 4392 rif_index = rif->rif_index; 4393 } else { 4394 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP; 4395 trap_id = MLXSW_TRAP_ID_RTR_INGRESS0; 4396 } 4397 4398 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 4399 mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, trap_id, 4400 rif_index); 4401 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 4402 } 4403 4404 static int mlxsw_sp_fib_entry_op_trap(struct mlxsw_sp *mlxsw_sp, 4405 struct mlxsw_sp_fib_entry *fib_entry, 4406 enum mlxsw_reg_ralue_op op) 4407 { 4408 char ralue_pl[MLXSW_REG_RALUE_LEN]; 4409 4410 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 4411 mlxsw_reg_ralue_act_ip2me_pack(ralue_pl); 4412 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 4413 } 4414 4415 static int mlxsw_sp_fib_entry_op_blackhole(struct mlxsw_sp *mlxsw_sp, 4416 struct mlxsw_sp_fib_entry *fib_entry, 4417 enum mlxsw_reg_ralue_op op) 4418 { 4419 enum mlxsw_reg_ralue_trap_action trap_action; 4420 char ralue_pl[MLXSW_REG_RALUE_LEN]; 4421 4422 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_DISCARD_ERROR; 4423 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 4424 mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, 0, 0); 4425 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 4426 } 4427 4428 static int 4429 mlxsw_sp_fib_entry_op_unreachable(struct mlxsw_sp *mlxsw_sp, 4430 struct mlxsw_sp_fib_entry *fib_entry, 4431 enum mlxsw_reg_ralue_op op) 4432 { 4433 enum mlxsw_reg_ralue_trap_action trap_action; 4434 char ralue_pl[MLXSW_REG_RALUE_LEN]; 4435 u16 trap_id; 4436 4437 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP; 4438 trap_id = MLXSW_TRAP_ID_RTR_INGRESS1; 4439 4440 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 4441 mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, trap_id, 0); 4442 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 4443 } 4444 4445 static int 4446 mlxsw_sp_fib_entry_op_ipip_decap(struct mlxsw_sp *mlxsw_sp, 4447 struct mlxsw_sp_fib_entry *fib_entry, 4448 enum mlxsw_reg_ralue_op op) 4449 { 4450 struct mlxsw_sp_ipip_entry *ipip_entry = fib_entry->decap.ipip_entry; 4451 const struct mlxsw_sp_ipip_ops *ipip_ops; 4452 4453 if (WARN_ON(!ipip_entry)) 4454 return -EINVAL; 4455 4456 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 4457 return ipip_ops->fib_entry_op(mlxsw_sp, ipip_entry, op, 4458 fib_entry->decap.tunnel_index); 4459 } 4460 4461 static int mlxsw_sp_fib_entry_op_nve_decap(struct mlxsw_sp *mlxsw_sp, 4462 struct mlxsw_sp_fib_entry *fib_entry, 4463 enum mlxsw_reg_ralue_op op) 4464 { 4465 char ralue_pl[MLXSW_REG_RALUE_LEN]; 4466 4467 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 4468 mlxsw_reg_ralue_act_ip2me_tun_pack(ralue_pl, 4469 fib_entry->decap.tunnel_index); 4470 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 4471 } 4472 4473 static int __mlxsw_sp_fib_entry_op(struct mlxsw_sp *mlxsw_sp, 4474 struct mlxsw_sp_fib_entry *fib_entry, 4475 enum mlxsw_reg_ralue_op op) 4476 { 4477 switch (fib_entry->type) { 4478 case MLXSW_SP_FIB_ENTRY_TYPE_REMOTE: 4479 return mlxsw_sp_fib_entry_op_remote(mlxsw_sp, fib_entry, op); 4480 case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL: 4481 return mlxsw_sp_fib_entry_op_local(mlxsw_sp, fib_entry, op); 4482 case MLXSW_SP_FIB_ENTRY_TYPE_TRAP: 4483 return mlxsw_sp_fib_entry_op_trap(mlxsw_sp, fib_entry, op); 4484 case MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE: 4485 return mlxsw_sp_fib_entry_op_blackhole(mlxsw_sp, fib_entry, op); 4486 case MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE: 4487 return mlxsw_sp_fib_entry_op_unreachable(mlxsw_sp, fib_entry, 4488 op); 4489 case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP: 4490 return mlxsw_sp_fib_entry_op_ipip_decap(mlxsw_sp, 4491 fib_entry, op); 4492 case MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP: 4493 return mlxsw_sp_fib_entry_op_nve_decap(mlxsw_sp, fib_entry, op); 4494 } 4495 return -EINVAL; 4496 } 4497 4498 static int mlxsw_sp_fib_entry_op(struct mlxsw_sp *mlxsw_sp, 4499 struct mlxsw_sp_fib_entry *fib_entry, 4500 enum mlxsw_reg_ralue_op op) 4501 { 4502 int err = __mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, op); 4503 4504 if (err) 4505 return err; 4506 4507 mlxsw_sp_fib_entry_hw_flags_refresh(mlxsw_sp, fib_entry, op); 4508 4509 return err; 4510 } 4511 4512 static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp, 4513 struct mlxsw_sp_fib_entry *fib_entry) 4514 { 4515 return mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, 4516 MLXSW_REG_RALUE_OP_WRITE_WRITE); 4517 } 4518 4519 static int mlxsw_sp_fib_entry_del(struct mlxsw_sp *mlxsw_sp, 4520 struct mlxsw_sp_fib_entry *fib_entry) 4521 { 4522 return mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, 4523 MLXSW_REG_RALUE_OP_WRITE_DELETE); 4524 } 4525 4526 static int 4527 mlxsw_sp_fib4_entry_type_set(struct mlxsw_sp *mlxsw_sp, 4528 const struct fib_entry_notifier_info *fen_info, 4529 struct mlxsw_sp_fib_entry *fib_entry) 4530 { 4531 struct net_device *dev = fib_info_nh(fen_info->fi, 0)->fib_nh_dev; 4532 union mlxsw_sp_l3addr dip = { .addr4 = htonl(fen_info->dst) }; 4533 struct mlxsw_sp_router *router = mlxsw_sp->router; 4534 u32 tb_id = mlxsw_sp_fix_tb_id(fen_info->tb_id); 4535 struct mlxsw_sp_ipip_entry *ipip_entry; 4536 struct fib_info *fi = fen_info->fi; 4537 4538 switch (fen_info->type) { 4539 case RTN_LOCAL: 4540 ipip_entry = mlxsw_sp_ipip_entry_find_by_decap(mlxsw_sp, dev, 4541 MLXSW_SP_L3_PROTO_IPV4, dip); 4542 if (ipip_entry && ipip_entry->ol_dev->flags & IFF_UP) { 4543 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP; 4544 return mlxsw_sp_fib_entry_decap_init(mlxsw_sp, 4545 fib_entry, 4546 ipip_entry); 4547 } 4548 if (mlxsw_sp_router_nve_is_decap(mlxsw_sp, tb_id, 4549 MLXSW_SP_L3_PROTO_IPV4, 4550 &dip)) { 4551 u32 tunnel_index; 4552 4553 tunnel_index = router->nve_decap_config.tunnel_index; 4554 fib_entry->decap.tunnel_index = tunnel_index; 4555 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP; 4556 return 0; 4557 } 4558 fallthrough; 4559 case RTN_BROADCAST: 4560 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 4561 return 0; 4562 case RTN_BLACKHOLE: 4563 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE; 4564 return 0; 4565 case RTN_UNREACHABLE: 4566 case RTN_PROHIBIT: 4567 /* Packets hitting these routes need to be trapped, but 4568 * can do so with a lower priority than packets directed 4569 * at the host, so use action type local instead of trap. 4570 */ 4571 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE; 4572 return 0; 4573 case RTN_UNICAST: 4574 if (mlxsw_sp_fi_is_gateway(mlxsw_sp, fi)) 4575 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_REMOTE; 4576 else 4577 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL; 4578 return 0; 4579 default: 4580 return -EINVAL; 4581 } 4582 } 4583 4584 static void 4585 mlxsw_sp_fib4_entry_type_unset(struct mlxsw_sp *mlxsw_sp, 4586 struct mlxsw_sp_fib_entry *fib_entry) 4587 { 4588 switch (fib_entry->type) { 4589 case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP: 4590 mlxsw_sp_fib_entry_decap_fini(mlxsw_sp, fib_entry); 4591 break; 4592 default: 4593 break; 4594 } 4595 } 4596 4597 static struct mlxsw_sp_fib4_entry * 4598 mlxsw_sp_fib4_entry_create(struct mlxsw_sp *mlxsw_sp, 4599 struct mlxsw_sp_fib_node *fib_node, 4600 const struct fib_entry_notifier_info *fen_info) 4601 { 4602 struct mlxsw_sp_fib4_entry *fib4_entry; 4603 struct mlxsw_sp_fib_entry *fib_entry; 4604 int err; 4605 4606 fib4_entry = kzalloc(sizeof(*fib4_entry), GFP_KERNEL); 4607 if (!fib4_entry) 4608 return ERR_PTR(-ENOMEM); 4609 fib_entry = &fib4_entry->common; 4610 4611 err = mlxsw_sp_fib4_entry_type_set(mlxsw_sp, fen_info, fib_entry); 4612 if (err) 4613 goto err_fib4_entry_type_set; 4614 4615 err = mlxsw_sp_nexthop4_group_get(mlxsw_sp, fib_entry, fen_info->fi); 4616 if (err) 4617 goto err_nexthop4_group_get; 4618 4619 fib4_entry->prio = fen_info->fi->fib_priority; 4620 fib4_entry->tb_id = fen_info->tb_id; 4621 fib4_entry->type = fen_info->type; 4622 fib4_entry->tos = fen_info->tos; 4623 4624 fib_entry->fib_node = fib_node; 4625 4626 return fib4_entry; 4627 4628 err_nexthop4_group_get: 4629 mlxsw_sp_fib4_entry_type_unset(mlxsw_sp, fib_entry); 4630 err_fib4_entry_type_set: 4631 kfree(fib4_entry); 4632 return ERR_PTR(err); 4633 } 4634 4635 static void mlxsw_sp_fib4_entry_destroy(struct mlxsw_sp *mlxsw_sp, 4636 struct mlxsw_sp_fib4_entry *fib4_entry) 4637 { 4638 mlxsw_sp_nexthop4_group_put(mlxsw_sp, &fib4_entry->common); 4639 mlxsw_sp_fib4_entry_type_unset(mlxsw_sp, &fib4_entry->common); 4640 kfree(fib4_entry); 4641 } 4642 4643 static struct mlxsw_sp_fib4_entry * 4644 mlxsw_sp_fib4_entry_lookup(struct mlxsw_sp *mlxsw_sp, 4645 const struct fib_entry_notifier_info *fen_info) 4646 { 4647 struct mlxsw_sp_fib4_entry *fib4_entry; 4648 struct mlxsw_sp_fib_node *fib_node; 4649 struct mlxsw_sp_fib *fib; 4650 struct mlxsw_sp_vr *vr; 4651 4652 vr = mlxsw_sp_vr_find(mlxsw_sp, fen_info->tb_id); 4653 if (!vr) 4654 return NULL; 4655 fib = mlxsw_sp_vr_fib(vr, MLXSW_SP_L3_PROTO_IPV4); 4656 4657 fib_node = mlxsw_sp_fib_node_lookup(fib, &fen_info->dst, 4658 sizeof(fen_info->dst), 4659 fen_info->dst_len); 4660 if (!fib_node) 4661 return NULL; 4662 4663 fib4_entry = container_of(fib_node->fib_entry, 4664 struct mlxsw_sp_fib4_entry, common); 4665 if (fib4_entry->tb_id == fen_info->tb_id && 4666 fib4_entry->tos == fen_info->tos && 4667 fib4_entry->type == fen_info->type && 4668 mlxsw_sp_nexthop4_group_fi(fib4_entry->common.nh_group) == 4669 fen_info->fi) 4670 return fib4_entry; 4671 4672 return NULL; 4673 } 4674 4675 static const struct rhashtable_params mlxsw_sp_fib_ht_params = { 4676 .key_offset = offsetof(struct mlxsw_sp_fib_node, key), 4677 .head_offset = offsetof(struct mlxsw_sp_fib_node, ht_node), 4678 .key_len = sizeof(struct mlxsw_sp_fib_key), 4679 .automatic_shrinking = true, 4680 }; 4681 4682 static int mlxsw_sp_fib_node_insert(struct mlxsw_sp_fib *fib, 4683 struct mlxsw_sp_fib_node *fib_node) 4684 { 4685 return rhashtable_insert_fast(&fib->ht, &fib_node->ht_node, 4686 mlxsw_sp_fib_ht_params); 4687 } 4688 4689 static void mlxsw_sp_fib_node_remove(struct mlxsw_sp_fib *fib, 4690 struct mlxsw_sp_fib_node *fib_node) 4691 { 4692 rhashtable_remove_fast(&fib->ht, &fib_node->ht_node, 4693 mlxsw_sp_fib_ht_params); 4694 } 4695 4696 static struct mlxsw_sp_fib_node * 4697 mlxsw_sp_fib_node_lookup(struct mlxsw_sp_fib *fib, const void *addr, 4698 size_t addr_len, unsigned char prefix_len) 4699 { 4700 struct mlxsw_sp_fib_key key; 4701 4702 memset(&key, 0, sizeof(key)); 4703 memcpy(key.addr, addr, addr_len); 4704 key.prefix_len = prefix_len; 4705 return rhashtable_lookup_fast(&fib->ht, &key, mlxsw_sp_fib_ht_params); 4706 } 4707 4708 static struct mlxsw_sp_fib_node * 4709 mlxsw_sp_fib_node_create(struct mlxsw_sp_fib *fib, const void *addr, 4710 size_t addr_len, unsigned char prefix_len) 4711 { 4712 struct mlxsw_sp_fib_node *fib_node; 4713 4714 fib_node = kzalloc(sizeof(*fib_node), GFP_KERNEL); 4715 if (!fib_node) 4716 return NULL; 4717 4718 list_add(&fib_node->list, &fib->node_list); 4719 memcpy(fib_node->key.addr, addr, addr_len); 4720 fib_node->key.prefix_len = prefix_len; 4721 4722 return fib_node; 4723 } 4724 4725 static void mlxsw_sp_fib_node_destroy(struct mlxsw_sp_fib_node *fib_node) 4726 { 4727 list_del(&fib_node->list); 4728 kfree(fib_node); 4729 } 4730 4731 static int mlxsw_sp_fib_lpm_tree_link(struct mlxsw_sp *mlxsw_sp, 4732 struct mlxsw_sp_fib_node *fib_node) 4733 { 4734 struct mlxsw_sp_prefix_usage req_prefix_usage; 4735 struct mlxsw_sp_fib *fib = fib_node->fib; 4736 struct mlxsw_sp_lpm_tree *lpm_tree; 4737 int err; 4738 4739 lpm_tree = mlxsw_sp->router->lpm.proto_trees[fib->proto]; 4740 if (lpm_tree->prefix_ref_count[fib_node->key.prefix_len] != 0) 4741 goto out; 4742 4743 mlxsw_sp_prefix_usage_cpy(&req_prefix_usage, &lpm_tree->prefix_usage); 4744 mlxsw_sp_prefix_usage_set(&req_prefix_usage, fib_node->key.prefix_len); 4745 lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, 4746 fib->proto); 4747 if (IS_ERR(lpm_tree)) 4748 return PTR_ERR(lpm_tree); 4749 4750 err = mlxsw_sp_vrs_lpm_tree_replace(mlxsw_sp, fib, lpm_tree); 4751 if (err) 4752 goto err_lpm_tree_replace; 4753 4754 out: 4755 lpm_tree->prefix_ref_count[fib_node->key.prefix_len]++; 4756 return 0; 4757 4758 err_lpm_tree_replace: 4759 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 4760 return err; 4761 } 4762 4763 static void mlxsw_sp_fib_lpm_tree_unlink(struct mlxsw_sp *mlxsw_sp, 4764 struct mlxsw_sp_fib_node *fib_node) 4765 { 4766 struct mlxsw_sp_lpm_tree *lpm_tree = fib_node->fib->lpm_tree; 4767 struct mlxsw_sp_prefix_usage req_prefix_usage; 4768 struct mlxsw_sp_fib *fib = fib_node->fib; 4769 int err; 4770 4771 if (--lpm_tree->prefix_ref_count[fib_node->key.prefix_len] != 0) 4772 return; 4773 /* Try to construct a new LPM tree from the current prefix usage 4774 * minus the unused one. If we fail, continue using the old one. 4775 */ 4776 mlxsw_sp_prefix_usage_cpy(&req_prefix_usage, &lpm_tree->prefix_usage); 4777 mlxsw_sp_prefix_usage_clear(&req_prefix_usage, 4778 fib_node->key.prefix_len); 4779 lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, 4780 fib->proto); 4781 if (IS_ERR(lpm_tree)) 4782 return; 4783 4784 err = mlxsw_sp_vrs_lpm_tree_replace(mlxsw_sp, fib, lpm_tree); 4785 if (err) 4786 goto err_lpm_tree_replace; 4787 4788 return; 4789 4790 err_lpm_tree_replace: 4791 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 4792 } 4793 4794 static int mlxsw_sp_fib_node_init(struct mlxsw_sp *mlxsw_sp, 4795 struct mlxsw_sp_fib_node *fib_node, 4796 struct mlxsw_sp_fib *fib) 4797 { 4798 int err; 4799 4800 err = mlxsw_sp_fib_node_insert(fib, fib_node); 4801 if (err) 4802 return err; 4803 fib_node->fib = fib; 4804 4805 err = mlxsw_sp_fib_lpm_tree_link(mlxsw_sp, fib_node); 4806 if (err) 4807 goto err_fib_lpm_tree_link; 4808 4809 return 0; 4810 4811 err_fib_lpm_tree_link: 4812 fib_node->fib = NULL; 4813 mlxsw_sp_fib_node_remove(fib, fib_node); 4814 return err; 4815 } 4816 4817 static void mlxsw_sp_fib_node_fini(struct mlxsw_sp *mlxsw_sp, 4818 struct mlxsw_sp_fib_node *fib_node) 4819 { 4820 struct mlxsw_sp_fib *fib = fib_node->fib; 4821 4822 mlxsw_sp_fib_lpm_tree_unlink(mlxsw_sp, fib_node); 4823 fib_node->fib = NULL; 4824 mlxsw_sp_fib_node_remove(fib, fib_node); 4825 } 4826 4827 static struct mlxsw_sp_fib_node * 4828 mlxsw_sp_fib_node_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, const void *addr, 4829 size_t addr_len, unsigned char prefix_len, 4830 enum mlxsw_sp_l3proto proto) 4831 { 4832 struct mlxsw_sp_fib_node *fib_node; 4833 struct mlxsw_sp_fib *fib; 4834 struct mlxsw_sp_vr *vr; 4835 int err; 4836 4837 vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id, NULL); 4838 if (IS_ERR(vr)) 4839 return ERR_CAST(vr); 4840 fib = mlxsw_sp_vr_fib(vr, proto); 4841 4842 fib_node = mlxsw_sp_fib_node_lookup(fib, addr, addr_len, prefix_len); 4843 if (fib_node) 4844 return fib_node; 4845 4846 fib_node = mlxsw_sp_fib_node_create(fib, addr, addr_len, prefix_len); 4847 if (!fib_node) { 4848 err = -ENOMEM; 4849 goto err_fib_node_create; 4850 } 4851 4852 err = mlxsw_sp_fib_node_init(mlxsw_sp, fib_node, fib); 4853 if (err) 4854 goto err_fib_node_init; 4855 4856 return fib_node; 4857 4858 err_fib_node_init: 4859 mlxsw_sp_fib_node_destroy(fib_node); 4860 err_fib_node_create: 4861 mlxsw_sp_vr_put(mlxsw_sp, vr); 4862 return ERR_PTR(err); 4863 } 4864 4865 static void mlxsw_sp_fib_node_put(struct mlxsw_sp *mlxsw_sp, 4866 struct mlxsw_sp_fib_node *fib_node) 4867 { 4868 struct mlxsw_sp_vr *vr = fib_node->fib->vr; 4869 4870 if (fib_node->fib_entry) 4871 return; 4872 mlxsw_sp_fib_node_fini(mlxsw_sp, fib_node); 4873 mlxsw_sp_fib_node_destroy(fib_node); 4874 mlxsw_sp_vr_put(mlxsw_sp, vr); 4875 } 4876 4877 static int mlxsw_sp_fib_node_entry_link(struct mlxsw_sp *mlxsw_sp, 4878 struct mlxsw_sp_fib_entry *fib_entry) 4879 { 4880 struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node; 4881 int err; 4882 4883 fib_node->fib_entry = fib_entry; 4884 4885 err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 4886 if (err) 4887 goto err_fib_entry_update; 4888 4889 return 0; 4890 4891 err_fib_entry_update: 4892 fib_node->fib_entry = NULL; 4893 return err; 4894 } 4895 4896 static void 4897 mlxsw_sp_fib_node_entry_unlink(struct mlxsw_sp *mlxsw_sp, 4898 struct mlxsw_sp_fib_entry *fib_entry) 4899 { 4900 struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node; 4901 4902 mlxsw_sp_fib_entry_del(mlxsw_sp, fib_entry); 4903 fib_node->fib_entry = NULL; 4904 } 4905 4906 static bool mlxsw_sp_fib4_allow_replace(struct mlxsw_sp_fib4_entry *fib4_entry) 4907 { 4908 struct mlxsw_sp_fib_node *fib_node = fib4_entry->common.fib_node; 4909 struct mlxsw_sp_fib4_entry *fib4_replaced; 4910 4911 if (!fib_node->fib_entry) 4912 return true; 4913 4914 fib4_replaced = container_of(fib_node->fib_entry, 4915 struct mlxsw_sp_fib4_entry, common); 4916 if (fib4_entry->tb_id == RT_TABLE_MAIN && 4917 fib4_replaced->tb_id == RT_TABLE_LOCAL) 4918 return false; 4919 4920 return true; 4921 } 4922 4923 static int 4924 mlxsw_sp_router_fib4_replace(struct mlxsw_sp *mlxsw_sp, 4925 const struct fib_entry_notifier_info *fen_info) 4926 { 4927 struct mlxsw_sp_fib4_entry *fib4_entry, *fib4_replaced; 4928 struct mlxsw_sp_fib_entry *replaced; 4929 struct mlxsw_sp_fib_node *fib_node; 4930 int err; 4931 4932 if (mlxsw_sp->router->aborted) 4933 return 0; 4934 4935 fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, fen_info->tb_id, 4936 &fen_info->dst, sizeof(fen_info->dst), 4937 fen_info->dst_len, 4938 MLXSW_SP_L3_PROTO_IPV4); 4939 if (IS_ERR(fib_node)) { 4940 dev_warn(mlxsw_sp->bus_info->dev, "Failed to get FIB node\n"); 4941 return PTR_ERR(fib_node); 4942 } 4943 4944 fib4_entry = mlxsw_sp_fib4_entry_create(mlxsw_sp, fib_node, fen_info); 4945 if (IS_ERR(fib4_entry)) { 4946 dev_warn(mlxsw_sp->bus_info->dev, "Failed to create FIB entry\n"); 4947 err = PTR_ERR(fib4_entry); 4948 goto err_fib4_entry_create; 4949 } 4950 4951 if (!mlxsw_sp_fib4_allow_replace(fib4_entry)) { 4952 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); 4953 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 4954 return 0; 4955 } 4956 4957 replaced = fib_node->fib_entry; 4958 err = mlxsw_sp_fib_node_entry_link(mlxsw_sp, &fib4_entry->common); 4959 if (err) { 4960 dev_warn(mlxsw_sp->bus_info->dev, "Failed to link FIB entry to node\n"); 4961 goto err_fib_node_entry_link; 4962 } 4963 4964 /* Nothing to replace */ 4965 if (!replaced) 4966 return 0; 4967 4968 mlxsw_sp_fib_entry_hw_flags_clear(mlxsw_sp, replaced); 4969 fib4_replaced = container_of(replaced, struct mlxsw_sp_fib4_entry, 4970 common); 4971 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_replaced); 4972 4973 return 0; 4974 4975 err_fib_node_entry_link: 4976 fib_node->fib_entry = replaced; 4977 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); 4978 err_fib4_entry_create: 4979 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 4980 return err; 4981 } 4982 4983 static void mlxsw_sp_router_fib4_del(struct mlxsw_sp *mlxsw_sp, 4984 struct fib_entry_notifier_info *fen_info) 4985 { 4986 struct mlxsw_sp_fib4_entry *fib4_entry; 4987 struct mlxsw_sp_fib_node *fib_node; 4988 4989 if (mlxsw_sp->router->aborted) 4990 return; 4991 4992 fib4_entry = mlxsw_sp_fib4_entry_lookup(mlxsw_sp, fen_info); 4993 if (!fib4_entry) 4994 return; 4995 fib_node = fib4_entry->common.fib_node; 4996 4997 mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, &fib4_entry->common); 4998 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); 4999 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5000 } 5001 5002 static bool mlxsw_sp_fib6_rt_should_ignore(const struct fib6_info *rt) 5003 { 5004 /* Multicast routes aren't supported, so ignore them. Neighbour 5005 * Discovery packets are specifically trapped. 5006 */ 5007 if (ipv6_addr_type(&rt->fib6_dst.addr) & IPV6_ADDR_MULTICAST) 5008 return true; 5009 5010 /* Cloned routes are irrelevant in the forwarding path. */ 5011 if (rt->fib6_flags & RTF_CACHE) 5012 return true; 5013 5014 return false; 5015 } 5016 5017 static struct mlxsw_sp_rt6 *mlxsw_sp_rt6_create(struct fib6_info *rt) 5018 { 5019 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5020 5021 mlxsw_sp_rt6 = kzalloc(sizeof(*mlxsw_sp_rt6), GFP_KERNEL); 5022 if (!mlxsw_sp_rt6) 5023 return ERR_PTR(-ENOMEM); 5024 5025 /* In case of route replace, replaced route is deleted with 5026 * no notification. Take reference to prevent accessing freed 5027 * memory. 5028 */ 5029 mlxsw_sp_rt6->rt = rt; 5030 fib6_info_hold(rt); 5031 5032 return mlxsw_sp_rt6; 5033 } 5034 5035 #if IS_ENABLED(CONFIG_IPV6) 5036 static void mlxsw_sp_rt6_release(struct fib6_info *rt) 5037 { 5038 fib6_info_release(rt); 5039 } 5040 #else 5041 static void mlxsw_sp_rt6_release(struct fib6_info *rt) 5042 { 5043 } 5044 #endif 5045 5046 static void mlxsw_sp_rt6_destroy(struct mlxsw_sp_rt6 *mlxsw_sp_rt6) 5047 { 5048 struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh; 5049 5050 fib6_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD; 5051 mlxsw_sp_rt6_release(mlxsw_sp_rt6->rt); 5052 kfree(mlxsw_sp_rt6); 5053 } 5054 5055 static struct fib6_info * 5056 mlxsw_sp_fib6_entry_rt(const struct mlxsw_sp_fib6_entry *fib6_entry) 5057 { 5058 return list_first_entry(&fib6_entry->rt6_list, struct mlxsw_sp_rt6, 5059 list)->rt; 5060 } 5061 5062 static struct mlxsw_sp_rt6 * 5063 mlxsw_sp_fib6_entry_rt_find(const struct mlxsw_sp_fib6_entry *fib6_entry, 5064 const struct fib6_info *rt) 5065 { 5066 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5067 5068 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 5069 if (mlxsw_sp_rt6->rt == rt) 5070 return mlxsw_sp_rt6; 5071 } 5072 5073 return NULL; 5074 } 5075 5076 static bool mlxsw_sp_nexthop6_ipip_type(const struct mlxsw_sp *mlxsw_sp, 5077 const struct fib6_info *rt, 5078 enum mlxsw_sp_ipip_type *ret) 5079 { 5080 return rt->fib6_nh->fib_nh_dev && 5081 mlxsw_sp_netdev_ipip_type(mlxsw_sp, rt->fib6_nh->fib_nh_dev, ret); 5082 } 5083 5084 static int mlxsw_sp_nexthop6_type_init(struct mlxsw_sp *mlxsw_sp, 5085 struct mlxsw_sp_nexthop_group *nh_grp, 5086 struct mlxsw_sp_nexthop *nh, 5087 const struct fib6_info *rt) 5088 { 5089 const struct mlxsw_sp_ipip_ops *ipip_ops; 5090 struct mlxsw_sp_ipip_entry *ipip_entry; 5091 struct net_device *dev = rt->fib6_nh->fib_nh_dev; 5092 struct mlxsw_sp_rif *rif; 5093 int err; 5094 5095 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev); 5096 if (ipip_entry) { 5097 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 5098 if (ipip_ops->can_offload(mlxsw_sp, dev, 5099 MLXSW_SP_L3_PROTO_IPV6)) { 5100 nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP; 5101 mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry); 5102 return 0; 5103 } 5104 } 5105 5106 nh->type = MLXSW_SP_NEXTHOP_TYPE_ETH; 5107 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 5108 if (!rif) 5109 return 0; 5110 mlxsw_sp_nexthop_rif_init(nh, rif); 5111 5112 err = mlxsw_sp_nexthop_neigh_init(mlxsw_sp, nh); 5113 if (err) 5114 goto err_nexthop_neigh_init; 5115 5116 return 0; 5117 5118 err_nexthop_neigh_init: 5119 mlxsw_sp_nexthop_rif_fini(nh); 5120 return err; 5121 } 5122 5123 static void mlxsw_sp_nexthop6_type_fini(struct mlxsw_sp *mlxsw_sp, 5124 struct mlxsw_sp_nexthop *nh) 5125 { 5126 mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); 5127 } 5128 5129 static int mlxsw_sp_nexthop6_init(struct mlxsw_sp *mlxsw_sp, 5130 struct mlxsw_sp_nexthop_group *nh_grp, 5131 struct mlxsw_sp_nexthop *nh, 5132 const struct fib6_info *rt) 5133 { 5134 struct net_device *dev = rt->fib6_nh->fib_nh_dev; 5135 5136 nh->nh_grp = nh_grp; 5137 nh->nh_weight = rt->fib6_nh->fib_nh_weight; 5138 memcpy(&nh->gw_addr, &rt->fib6_nh->fib_nh_gw6, sizeof(nh->gw_addr)); 5139 mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh); 5140 5141 list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list); 5142 5143 if (!dev) 5144 return 0; 5145 nh->ifindex = dev->ifindex; 5146 5147 return mlxsw_sp_nexthop6_type_init(mlxsw_sp, nh_grp, nh, rt); 5148 } 5149 5150 static void mlxsw_sp_nexthop6_fini(struct mlxsw_sp *mlxsw_sp, 5151 struct mlxsw_sp_nexthop *nh) 5152 { 5153 mlxsw_sp_nexthop6_type_fini(mlxsw_sp, nh); 5154 list_del(&nh->router_list_node); 5155 mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh); 5156 } 5157 5158 static bool mlxsw_sp_rt6_is_gateway(const struct mlxsw_sp *mlxsw_sp, 5159 const struct fib6_info *rt) 5160 { 5161 return rt->fib6_nh->fib_nh_gw_family || 5162 mlxsw_sp_nexthop6_ipip_type(mlxsw_sp, rt, NULL); 5163 } 5164 5165 static struct mlxsw_sp_nexthop_group * 5166 mlxsw_sp_nexthop6_group_create(struct mlxsw_sp *mlxsw_sp, 5167 struct mlxsw_sp_fib6_entry *fib6_entry) 5168 { 5169 struct mlxsw_sp_nexthop_group *nh_grp; 5170 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5171 struct mlxsw_sp_nexthop *nh; 5172 int i = 0; 5173 int err; 5174 5175 nh_grp = kzalloc(struct_size(nh_grp, nexthops, fib6_entry->nrt6), 5176 GFP_KERNEL); 5177 if (!nh_grp) 5178 return ERR_PTR(-ENOMEM); 5179 INIT_LIST_HEAD(&nh_grp->fib_list); 5180 #if IS_ENABLED(CONFIG_IPV6) 5181 nh_grp->neigh_tbl = &nd_tbl; 5182 #endif 5183 mlxsw_sp_rt6 = list_first_entry(&fib6_entry->rt6_list, 5184 struct mlxsw_sp_rt6, list); 5185 nh_grp->gateway = mlxsw_sp_rt6_is_gateway(mlxsw_sp, mlxsw_sp_rt6->rt); 5186 nh_grp->count = fib6_entry->nrt6; 5187 for (i = 0; i < nh_grp->count; i++) { 5188 struct fib6_info *rt = mlxsw_sp_rt6->rt; 5189 5190 nh = &nh_grp->nexthops[i]; 5191 err = mlxsw_sp_nexthop6_init(mlxsw_sp, nh_grp, nh, rt); 5192 if (err) 5193 goto err_nexthop6_init; 5194 mlxsw_sp_rt6 = list_next_entry(mlxsw_sp_rt6, list); 5195 } 5196 5197 err = mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp); 5198 if (err) 5199 goto err_nexthop_group_insert; 5200 5201 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 5202 return nh_grp; 5203 5204 err_nexthop_group_insert: 5205 err_nexthop6_init: 5206 for (i--; i >= 0; i--) { 5207 nh = &nh_grp->nexthops[i]; 5208 mlxsw_sp_nexthop6_fini(mlxsw_sp, nh); 5209 } 5210 kfree(nh_grp); 5211 return ERR_PTR(err); 5212 } 5213 5214 static void 5215 mlxsw_sp_nexthop6_group_destroy(struct mlxsw_sp *mlxsw_sp, 5216 struct mlxsw_sp_nexthop_group *nh_grp) 5217 { 5218 struct mlxsw_sp_nexthop *nh; 5219 int i = nh_grp->count; 5220 5221 mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp); 5222 for (i--; i >= 0; i--) { 5223 nh = &nh_grp->nexthops[i]; 5224 mlxsw_sp_nexthop6_fini(mlxsw_sp, nh); 5225 } 5226 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 5227 WARN_ON(nh_grp->adj_index_valid); 5228 kfree(nh_grp); 5229 } 5230 5231 static int mlxsw_sp_nexthop6_group_get(struct mlxsw_sp *mlxsw_sp, 5232 struct mlxsw_sp_fib6_entry *fib6_entry) 5233 { 5234 struct mlxsw_sp_nexthop_group *nh_grp; 5235 5236 nh_grp = mlxsw_sp_nexthop6_group_lookup(mlxsw_sp, fib6_entry); 5237 if (!nh_grp) { 5238 nh_grp = mlxsw_sp_nexthop6_group_create(mlxsw_sp, fib6_entry); 5239 if (IS_ERR(nh_grp)) 5240 return PTR_ERR(nh_grp); 5241 } 5242 5243 list_add_tail(&fib6_entry->common.nexthop_group_node, 5244 &nh_grp->fib_list); 5245 fib6_entry->common.nh_group = nh_grp; 5246 5247 /* The route and the nexthop are described by the same struct, so we 5248 * need to the update the nexthop offload indication for the new route. 5249 */ 5250 __mlxsw_sp_nexthop6_group_offload_refresh(nh_grp, fib6_entry); 5251 5252 return 0; 5253 } 5254 5255 static void mlxsw_sp_nexthop6_group_put(struct mlxsw_sp *mlxsw_sp, 5256 struct mlxsw_sp_fib_entry *fib_entry) 5257 { 5258 struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 5259 5260 list_del(&fib_entry->nexthop_group_node); 5261 if (!list_empty(&nh_grp->fib_list)) 5262 return; 5263 mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, nh_grp); 5264 } 5265 5266 static int 5267 mlxsw_sp_nexthop6_group_update(struct mlxsw_sp *mlxsw_sp, 5268 struct mlxsw_sp_fib6_entry *fib6_entry) 5269 { 5270 struct mlxsw_sp_nexthop_group *old_nh_grp = fib6_entry->common.nh_group; 5271 int err; 5272 5273 fib6_entry->common.nh_group = NULL; 5274 list_del(&fib6_entry->common.nexthop_group_node); 5275 5276 err = mlxsw_sp_nexthop6_group_get(mlxsw_sp, fib6_entry); 5277 if (err) 5278 goto err_nexthop6_group_get; 5279 5280 /* In case this entry is offloaded, then the adjacency index 5281 * currently associated with it in the device's table is that 5282 * of the old group. Start using the new one instead. 5283 */ 5284 err = mlxsw_sp_fib_entry_update(mlxsw_sp, &fib6_entry->common); 5285 if (err) 5286 goto err_fib_entry_update; 5287 5288 if (list_empty(&old_nh_grp->fib_list)) 5289 mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, old_nh_grp); 5290 5291 return 0; 5292 5293 err_fib_entry_update: 5294 mlxsw_sp_nexthop6_group_put(mlxsw_sp, &fib6_entry->common); 5295 err_nexthop6_group_get: 5296 list_add_tail(&fib6_entry->common.nexthop_group_node, 5297 &old_nh_grp->fib_list); 5298 fib6_entry->common.nh_group = old_nh_grp; 5299 return err; 5300 } 5301 5302 static int 5303 mlxsw_sp_fib6_entry_nexthop_add(struct mlxsw_sp *mlxsw_sp, 5304 struct mlxsw_sp_fib6_entry *fib6_entry, 5305 struct fib6_info **rt_arr, unsigned int nrt6) 5306 { 5307 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5308 int err, i; 5309 5310 for (i = 0; i < nrt6; i++) { 5311 mlxsw_sp_rt6 = mlxsw_sp_rt6_create(rt_arr[i]); 5312 if (IS_ERR(mlxsw_sp_rt6)) { 5313 err = PTR_ERR(mlxsw_sp_rt6); 5314 goto err_rt6_create; 5315 } 5316 5317 list_add_tail(&mlxsw_sp_rt6->list, &fib6_entry->rt6_list); 5318 fib6_entry->nrt6++; 5319 } 5320 5321 err = mlxsw_sp_nexthop6_group_update(mlxsw_sp, fib6_entry); 5322 if (err) 5323 goto err_nexthop6_group_update; 5324 5325 return 0; 5326 5327 err_nexthop6_group_update: 5328 i = nrt6; 5329 err_rt6_create: 5330 for (i--; i >= 0; i--) { 5331 fib6_entry->nrt6--; 5332 mlxsw_sp_rt6 = list_last_entry(&fib6_entry->rt6_list, 5333 struct mlxsw_sp_rt6, list); 5334 list_del(&mlxsw_sp_rt6->list); 5335 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 5336 } 5337 return err; 5338 } 5339 5340 static void 5341 mlxsw_sp_fib6_entry_nexthop_del(struct mlxsw_sp *mlxsw_sp, 5342 struct mlxsw_sp_fib6_entry *fib6_entry, 5343 struct fib6_info **rt_arr, unsigned int nrt6) 5344 { 5345 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5346 int i; 5347 5348 for (i = 0; i < nrt6; i++) { 5349 mlxsw_sp_rt6 = mlxsw_sp_fib6_entry_rt_find(fib6_entry, 5350 rt_arr[i]); 5351 if (WARN_ON_ONCE(!mlxsw_sp_rt6)) 5352 continue; 5353 5354 fib6_entry->nrt6--; 5355 list_del(&mlxsw_sp_rt6->list); 5356 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 5357 } 5358 5359 mlxsw_sp_nexthop6_group_update(mlxsw_sp, fib6_entry); 5360 } 5361 5362 static void mlxsw_sp_fib6_entry_type_set(struct mlxsw_sp *mlxsw_sp, 5363 struct mlxsw_sp_fib_entry *fib_entry, 5364 const struct fib6_info *rt) 5365 { 5366 /* Packets hitting RTF_REJECT routes need to be discarded by the 5367 * stack. We can rely on their destination device not having a 5368 * RIF (it's the loopback device) and can thus use action type 5369 * local, which will cause them to be trapped with a lower 5370 * priority than packets that need to be locally received. 5371 */ 5372 if (rt->fib6_flags & (RTF_LOCAL | RTF_ANYCAST)) 5373 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 5374 else if (rt->fib6_type == RTN_BLACKHOLE) 5375 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE; 5376 else if (rt->fib6_flags & RTF_REJECT) 5377 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE; 5378 else if (mlxsw_sp_rt6_is_gateway(mlxsw_sp, rt)) 5379 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_REMOTE; 5380 else 5381 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL; 5382 } 5383 5384 static void 5385 mlxsw_sp_fib6_entry_rt_destroy_all(struct mlxsw_sp_fib6_entry *fib6_entry) 5386 { 5387 struct mlxsw_sp_rt6 *mlxsw_sp_rt6, *tmp; 5388 5389 list_for_each_entry_safe(mlxsw_sp_rt6, tmp, &fib6_entry->rt6_list, 5390 list) { 5391 fib6_entry->nrt6--; 5392 list_del(&mlxsw_sp_rt6->list); 5393 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 5394 } 5395 } 5396 5397 static struct mlxsw_sp_fib6_entry * 5398 mlxsw_sp_fib6_entry_create(struct mlxsw_sp *mlxsw_sp, 5399 struct mlxsw_sp_fib_node *fib_node, 5400 struct fib6_info **rt_arr, unsigned int nrt6) 5401 { 5402 struct mlxsw_sp_fib6_entry *fib6_entry; 5403 struct mlxsw_sp_fib_entry *fib_entry; 5404 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5405 int err, i; 5406 5407 fib6_entry = kzalloc(sizeof(*fib6_entry), GFP_KERNEL); 5408 if (!fib6_entry) 5409 return ERR_PTR(-ENOMEM); 5410 fib_entry = &fib6_entry->common; 5411 5412 INIT_LIST_HEAD(&fib6_entry->rt6_list); 5413 5414 for (i = 0; i < nrt6; i++) { 5415 mlxsw_sp_rt6 = mlxsw_sp_rt6_create(rt_arr[i]); 5416 if (IS_ERR(mlxsw_sp_rt6)) { 5417 err = PTR_ERR(mlxsw_sp_rt6); 5418 goto err_rt6_create; 5419 } 5420 list_add_tail(&mlxsw_sp_rt6->list, &fib6_entry->rt6_list); 5421 fib6_entry->nrt6++; 5422 } 5423 5424 mlxsw_sp_fib6_entry_type_set(mlxsw_sp, fib_entry, rt_arr[0]); 5425 5426 err = mlxsw_sp_nexthop6_group_get(mlxsw_sp, fib6_entry); 5427 if (err) 5428 goto err_nexthop6_group_get; 5429 5430 fib_entry->fib_node = fib_node; 5431 5432 return fib6_entry; 5433 5434 err_nexthop6_group_get: 5435 i = nrt6; 5436 err_rt6_create: 5437 for (i--; i >= 0; i--) { 5438 fib6_entry->nrt6--; 5439 mlxsw_sp_rt6 = list_last_entry(&fib6_entry->rt6_list, 5440 struct mlxsw_sp_rt6, list); 5441 list_del(&mlxsw_sp_rt6->list); 5442 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 5443 } 5444 kfree(fib6_entry); 5445 return ERR_PTR(err); 5446 } 5447 5448 static void mlxsw_sp_fib6_entry_destroy(struct mlxsw_sp *mlxsw_sp, 5449 struct mlxsw_sp_fib6_entry *fib6_entry) 5450 { 5451 mlxsw_sp_nexthop6_group_put(mlxsw_sp, &fib6_entry->common); 5452 mlxsw_sp_fib6_entry_rt_destroy_all(fib6_entry); 5453 WARN_ON(fib6_entry->nrt6); 5454 kfree(fib6_entry); 5455 } 5456 5457 static struct mlxsw_sp_fib6_entry * 5458 mlxsw_sp_fib6_entry_lookup(struct mlxsw_sp *mlxsw_sp, 5459 const struct fib6_info *rt) 5460 { 5461 struct mlxsw_sp_fib6_entry *fib6_entry; 5462 struct mlxsw_sp_fib_node *fib_node; 5463 struct mlxsw_sp_fib *fib; 5464 struct fib6_info *cmp_rt; 5465 struct mlxsw_sp_vr *vr; 5466 5467 vr = mlxsw_sp_vr_find(mlxsw_sp, rt->fib6_table->tb6_id); 5468 if (!vr) 5469 return NULL; 5470 fib = mlxsw_sp_vr_fib(vr, MLXSW_SP_L3_PROTO_IPV6); 5471 5472 fib_node = mlxsw_sp_fib_node_lookup(fib, &rt->fib6_dst.addr, 5473 sizeof(rt->fib6_dst.addr), 5474 rt->fib6_dst.plen); 5475 if (!fib_node) 5476 return NULL; 5477 5478 fib6_entry = container_of(fib_node->fib_entry, 5479 struct mlxsw_sp_fib6_entry, common); 5480 cmp_rt = mlxsw_sp_fib6_entry_rt(fib6_entry); 5481 if (rt->fib6_table->tb6_id == cmp_rt->fib6_table->tb6_id && 5482 rt->fib6_metric == cmp_rt->fib6_metric && 5483 mlxsw_sp_fib6_entry_rt_find(fib6_entry, rt)) 5484 return fib6_entry; 5485 5486 return NULL; 5487 } 5488 5489 static bool mlxsw_sp_fib6_allow_replace(struct mlxsw_sp_fib6_entry *fib6_entry) 5490 { 5491 struct mlxsw_sp_fib_node *fib_node = fib6_entry->common.fib_node; 5492 struct mlxsw_sp_fib6_entry *fib6_replaced; 5493 struct fib6_info *rt, *rt_replaced; 5494 5495 if (!fib_node->fib_entry) 5496 return true; 5497 5498 fib6_replaced = container_of(fib_node->fib_entry, 5499 struct mlxsw_sp_fib6_entry, 5500 common); 5501 rt = mlxsw_sp_fib6_entry_rt(fib6_entry); 5502 rt_replaced = mlxsw_sp_fib6_entry_rt(fib6_replaced); 5503 if (rt->fib6_table->tb6_id == RT_TABLE_MAIN && 5504 rt_replaced->fib6_table->tb6_id == RT_TABLE_LOCAL) 5505 return false; 5506 5507 return true; 5508 } 5509 5510 static int mlxsw_sp_router_fib6_replace(struct mlxsw_sp *mlxsw_sp, 5511 struct fib6_info **rt_arr, 5512 unsigned int nrt6) 5513 { 5514 struct mlxsw_sp_fib6_entry *fib6_entry, *fib6_replaced; 5515 struct mlxsw_sp_fib_entry *replaced; 5516 struct mlxsw_sp_fib_node *fib_node; 5517 struct fib6_info *rt = rt_arr[0]; 5518 int err; 5519 5520 if (mlxsw_sp->router->aborted) 5521 return 0; 5522 5523 if (rt->fib6_src.plen) 5524 return -EINVAL; 5525 5526 if (mlxsw_sp_fib6_rt_should_ignore(rt)) 5527 return 0; 5528 5529 fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, rt->fib6_table->tb6_id, 5530 &rt->fib6_dst.addr, 5531 sizeof(rt->fib6_dst.addr), 5532 rt->fib6_dst.plen, 5533 MLXSW_SP_L3_PROTO_IPV6); 5534 if (IS_ERR(fib_node)) 5535 return PTR_ERR(fib_node); 5536 5537 fib6_entry = mlxsw_sp_fib6_entry_create(mlxsw_sp, fib_node, rt_arr, 5538 nrt6); 5539 if (IS_ERR(fib6_entry)) { 5540 err = PTR_ERR(fib6_entry); 5541 goto err_fib6_entry_create; 5542 } 5543 5544 if (!mlxsw_sp_fib6_allow_replace(fib6_entry)) { 5545 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 5546 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5547 return 0; 5548 } 5549 5550 replaced = fib_node->fib_entry; 5551 err = mlxsw_sp_fib_node_entry_link(mlxsw_sp, &fib6_entry->common); 5552 if (err) 5553 goto err_fib_node_entry_link; 5554 5555 /* Nothing to replace */ 5556 if (!replaced) 5557 return 0; 5558 5559 mlxsw_sp_fib_entry_hw_flags_clear(mlxsw_sp, replaced); 5560 fib6_replaced = container_of(replaced, struct mlxsw_sp_fib6_entry, 5561 common); 5562 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_replaced); 5563 5564 return 0; 5565 5566 err_fib_node_entry_link: 5567 fib_node->fib_entry = replaced; 5568 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 5569 err_fib6_entry_create: 5570 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5571 return err; 5572 } 5573 5574 static int mlxsw_sp_router_fib6_append(struct mlxsw_sp *mlxsw_sp, 5575 struct fib6_info **rt_arr, 5576 unsigned int nrt6) 5577 { 5578 struct mlxsw_sp_fib6_entry *fib6_entry; 5579 struct mlxsw_sp_fib_node *fib_node; 5580 struct fib6_info *rt = rt_arr[0]; 5581 int err; 5582 5583 if (mlxsw_sp->router->aborted) 5584 return 0; 5585 5586 if (rt->fib6_src.plen) 5587 return -EINVAL; 5588 5589 if (mlxsw_sp_fib6_rt_should_ignore(rt)) 5590 return 0; 5591 5592 fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, rt->fib6_table->tb6_id, 5593 &rt->fib6_dst.addr, 5594 sizeof(rt->fib6_dst.addr), 5595 rt->fib6_dst.plen, 5596 MLXSW_SP_L3_PROTO_IPV6); 5597 if (IS_ERR(fib_node)) 5598 return PTR_ERR(fib_node); 5599 5600 if (WARN_ON_ONCE(!fib_node->fib_entry)) { 5601 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5602 return -EINVAL; 5603 } 5604 5605 fib6_entry = container_of(fib_node->fib_entry, 5606 struct mlxsw_sp_fib6_entry, common); 5607 err = mlxsw_sp_fib6_entry_nexthop_add(mlxsw_sp, fib6_entry, rt_arr, 5608 nrt6); 5609 if (err) 5610 goto err_fib6_entry_nexthop_add; 5611 5612 return 0; 5613 5614 err_fib6_entry_nexthop_add: 5615 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5616 return err; 5617 } 5618 5619 static void mlxsw_sp_router_fib6_del(struct mlxsw_sp *mlxsw_sp, 5620 struct fib6_info **rt_arr, 5621 unsigned int nrt6) 5622 { 5623 struct mlxsw_sp_fib6_entry *fib6_entry; 5624 struct mlxsw_sp_fib_node *fib_node; 5625 struct fib6_info *rt = rt_arr[0]; 5626 5627 if (mlxsw_sp->router->aborted) 5628 return; 5629 5630 if (mlxsw_sp_fib6_rt_should_ignore(rt)) 5631 return; 5632 5633 /* Multipath routes are first added to the FIB trie and only then 5634 * notified. If we vetoed the addition, we will get a delete 5635 * notification for a route we do not have. Therefore, do not warn if 5636 * route was not found. 5637 */ 5638 fib6_entry = mlxsw_sp_fib6_entry_lookup(mlxsw_sp, rt); 5639 if (!fib6_entry) 5640 return; 5641 5642 /* If not all the nexthops are deleted, then only reduce the nexthop 5643 * group. 5644 */ 5645 if (nrt6 != fib6_entry->nrt6) { 5646 mlxsw_sp_fib6_entry_nexthop_del(mlxsw_sp, fib6_entry, rt_arr, 5647 nrt6); 5648 return; 5649 } 5650 5651 fib_node = fib6_entry->common.fib_node; 5652 5653 mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, &fib6_entry->common); 5654 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 5655 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5656 } 5657 5658 static int __mlxsw_sp_router_set_abort_trap(struct mlxsw_sp *mlxsw_sp, 5659 enum mlxsw_reg_ralxx_protocol proto, 5660 u8 tree_id) 5661 { 5662 char ralta_pl[MLXSW_REG_RALTA_LEN]; 5663 char ralst_pl[MLXSW_REG_RALST_LEN]; 5664 int i, err; 5665 5666 mlxsw_reg_ralta_pack(ralta_pl, true, proto, tree_id); 5667 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); 5668 if (err) 5669 return err; 5670 5671 mlxsw_reg_ralst_pack(ralst_pl, 0xff, tree_id); 5672 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl); 5673 if (err) 5674 return err; 5675 5676 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 5677 struct mlxsw_sp_vr *vr = &mlxsw_sp->router->vrs[i]; 5678 char raltb_pl[MLXSW_REG_RALTB_LEN]; 5679 char ralue_pl[MLXSW_REG_RALUE_LEN]; 5680 5681 mlxsw_reg_raltb_pack(raltb_pl, vr->id, proto, tree_id); 5682 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), 5683 raltb_pl); 5684 if (err) 5685 return err; 5686 5687 mlxsw_reg_ralue_pack(ralue_pl, proto, 5688 MLXSW_REG_RALUE_OP_WRITE_WRITE, vr->id, 0); 5689 mlxsw_reg_ralue_act_ip2me_pack(ralue_pl); 5690 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), 5691 ralue_pl); 5692 if (err) 5693 return err; 5694 } 5695 5696 return 0; 5697 } 5698 5699 static struct mlxsw_sp_mr_table * 5700 mlxsw_sp_router_fibmr_family_to_table(struct mlxsw_sp_vr *vr, int family) 5701 { 5702 if (family == RTNL_FAMILY_IPMR) 5703 return vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]; 5704 else 5705 return vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]; 5706 } 5707 5708 static int mlxsw_sp_router_fibmr_add(struct mlxsw_sp *mlxsw_sp, 5709 struct mfc_entry_notifier_info *men_info, 5710 bool replace) 5711 { 5712 struct mlxsw_sp_mr_table *mrt; 5713 struct mlxsw_sp_vr *vr; 5714 5715 if (mlxsw_sp->router->aborted) 5716 return 0; 5717 5718 vr = mlxsw_sp_vr_get(mlxsw_sp, men_info->tb_id, NULL); 5719 if (IS_ERR(vr)) 5720 return PTR_ERR(vr); 5721 5722 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, men_info->info.family); 5723 return mlxsw_sp_mr_route_add(mrt, men_info->mfc, replace); 5724 } 5725 5726 static void mlxsw_sp_router_fibmr_del(struct mlxsw_sp *mlxsw_sp, 5727 struct mfc_entry_notifier_info *men_info) 5728 { 5729 struct mlxsw_sp_mr_table *mrt; 5730 struct mlxsw_sp_vr *vr; 5731 5732 if (mlxsw_sp->router->aborted) 5733 return; 5734 5735 vr = mlxsw_sp_vr_find(mlxsw_sp, men_info->tb_id); 5736 if (WARN_ON(!vr)) 5737 return; 5738 5739 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, men_info->info.family); 5740 mlxsw_sp_mr_route_del(mrt, men_info->mfc); 5741 mlxsw_sp_vr_put(mlxsw_sp, vr); 5742 } 5743 5744 static int 5745 mlxsw_sp_router_fibmr_vif_add(struct mlxsw_sp *mlxsw_sp, 5746 struct vif_entry_notifier_info *ven_info) 5747 { 5748 struct mlxsw_sp_mr_table *mrt; 5749 struct mlxsw_sp_rif *rif; 5750 struct mlxsw_sp_vr *vr; 5751 5752 if (mlxsw_sp->router->aborted) 5753 return 0; 5754 5755 vr = mlxsw_sp_vr_get(mlxsw_sp, ven_info->tb_id, NULL); 5756 if (IS_ERR(vr)) 5757 return PTR_ERR(vr); 5758 5759 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, ven_info->info.family); 5760 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, ven_info->dev); 5761 return mlxsw_sp_mr_vif_add(mrt, ven_info->dev, 5762 ven_info->vif_index, 5763 ven_info->vif_flags, rif); 5764 } 5765 5766 static void 5767 mlxsw_sp_router_fibmr_vif_del(struct mlxsw_sp *mlxsw_sp, 5768 struct vif_entry_notifier_info *ven_info) 5769 { 5770 struct mlxsw_sp_mr_table *mrt; 5771 struct mlxsw_sp_vr *vr; 5772 5773 if (mlxsw_sp->router->aborted) 5774 return; 5775 5776 vr = mlxsw_sp_vr_find(mlxsw_sp, ven_info->tb_id); 5777 if (WARN_ON(!vr)) 5778 return; 5779 5780 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, ven_info->info.family); 5781 mlxsw_sp_mr_vif_del(mrt, ven_info->vif_index); 5782 mlxsw_sp_vr_put(mlxsw_sp, vr); 5783 } 5784 5785 static int mlxsw_sp_router_set_abort_trap(struct mlxsw_sp *mlxsw_sp) 5786 { 5787 enum mlxsw_reg_ralxx_protocol proto = MLXSW_REG_RALXX_PROTOCOL_IPV4; 5788 int err; 5789 5790 err = __mlxsw_sp_router_set_abort_trap(mlxsw_sp, proto, 5791 MLXSW_SP_LPM_TREE_MIN); 5792 if (err) 5793 return err; 5794 5795 /* The multicast router code does not need an abort trap as by default, 5796 * packets that don't match any routes are trapped to the CPU. 5797 */ 5798 5799 proto = MLXSW_REG_RALXX_PROTOCOL_IPV6; 5800 return __mlxsw_sp_router_set_abort_trap(mlxsw_sp, proto, 5801 MLXSW_SP_LPM_TREE_MIN + 1); 5802 } 5803 5804 static void mlxsw_sp_fib4_node_flush(struct mlxsw_sp *mlxsw_sp, 5805 struct mlxsw_sp_fib_node *fib_node) 5806 { 5807 struct mlxsw_sp_fib4_entry *fib4_entry; 5808 5809 fib4_entry = container_of(fib_node->fib_entry, 5810 struct mlxsw_sp_fib4_entry, common); 5811 mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, fib_node->fib_entry); 5812 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); 5813 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5814 } 5815 5816 static void mlxsw_sp_fib6_node_flush(struct mlxsw_sp *mlxsw_sp, 5817 struct mlxsw_sp_fib_node *fib_node) 5818 { 5819 struct mlxsw_sp_fib6_entry *fib6_entry; 5820 5821 fib6_entry = container_of(fib_node->fib_entry, 5822 struct mlxsw_sp_fib6_entry, common); 5823 mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, fib_node->fib_entry); 5824 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 5825 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5826 } 5827 5828 static void mlxsw_sp_fib_node_flush(struct mlxsw_sp *mlxsw_sp, 5829 struct mlxsw_sp_fib_node *fib_node) 5830 { 5831 switch (fib_node->fib->proto) { 5832 case MLXSW_SP_L3_PROTO_IPV4: 5833 mlxsw_sp_fib4_node_flush(mlxsw_sp, fib_node); 5834 break; 5835 case MLXSW_SP_L3_PROTO_IPV6: 5836 mlxsw_sp_fib6_node_flush(mlxsw_sp, fib_node); 5837 break; 5838 } 5839 } 5840 5841 static void mlxsw_sp_vr_fib_flush(struct mlxsw_sp *mlxsw_sp, 5842 struct mlxsw_sp_vr *vr, 5843 enum mlxsw_sp_l3proto proto) 5844 { 5845 struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto); 5846 struct mlxsw_sp_fib_node *fib_node, *tmp; 5847 5848 list_for_each_entry_safe(fib_node, tmp, &fib->node_list, list) { 5849 bool do_break = &tmp->list == &fib->node_list; 5850 5851 mlxsw_sp_fib_node_flush(mlxsw_sp, fib_node); 5852 if (do_break) 5853 break; 5854 } 5855 } 5856 5857 static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp) 5858 { 5859 int i, j; 5860 5861 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 5862 struct mlxsw_sp_vr *vr = &mlxsw_sp->router->vrs[i]; 5863 5864 if (!mlxsw_sp_vr_is_used(vr)) 5865 continue; 5866 5867 for (j = 0; j < MLXSW_SP_L3_PROTO_MAX; j++) 5868 mlxsw_sp_mr_table_flush(vr->mr_table[j]); 5869 mlxsw_sp_vr_fib_flush(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV4); 5870 5871 /* If virtual router was only used for IPv4, then it's no 5872 * longer used. 5873 */ 5874 if (!mlxsw_sp_vr_is_used(vr)) 5875 continue; 5876 mlxsw_sp_vr_fib_flush(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV6); 5877 } 5878 5879 /* After flushing all the routes, it is not possible anyone is still 5880 * using the adjacency index that is discarding packets, so free it in 5881 * case it was allocated. 5882 */ 5883 if (!mlxsw_sp->router->adj_discard_index_valid) 5884 return; 5885 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1, 5886 mlxsw_sp->router->adj_discard_index); 5887 mlxsw_sp->router->adj_discard_index_valid = false; 5888 } 5889 5890 static void mlxsw_sp_router_fib_abort(struct mlxsw_sp *mlxsw_sp) 5891 { 5892 int err; 5893 5894 if (mlxsw_sp->router->aborted) 5895 return; 5896 dev_warn(mlxsw_sp->bus_info->dev, "FIB abort triggered. Note that FIB entries are no longer being offloaded to this device.\n"); 5897 mlxsw_sp_router_fib_flush(mlxsw_sp); 5898 mlxsw_sp->router->aborted = true; 5899 err = mlxsw_sp_router_set_abort_trap(mlxsw_sp); 5900 if (err) 5901 dev_warn(mlxsw_sp->bus_info->dev, "Failed to set abort trap.\n"); 5902 } 5903 5904 struct mlxsw_sp_fib6_event_work { 5905 struct fib6_info **rt_arr; 5906 unsigned int nrt6; 5907 }; 5908 5909 struct mlxsw_sp_fib_event_work { 5910 struct work_struct work; 5911 union { 5912 struct mlxsw_sp_fib6_event_work fib6_work; 5913 struct fib_entry_notifier_info fen_info; 5914 struct fib_rule_notifier_info fr_info; 5915 struct fib_nh_notifier_info fnh_info; 5916 struct mfc_entry_notifier_info men_info; 5917 struct vif_entry_notifier_info ven_info; 5918 }; 5919 struct mlxsw_sp *mlxsw_sp; 5920 unsigned long event; 5921 }; 5922 5923 static int 5924 mlxsw_sp_router_fib6_work_init(struct mlxsw_sp_fib6_event_work *fib6_work, 5925 struct fib6_entry_notifier_info *fen6_info) 5926 { 5927 struct fib6_info *rt = fen6_info->rt; 5928 struct fib6_info **rt_arr; 5929 struct fib6_info *iter; 5930 unsigned int nrt6; 5931 int i = 0; 5932 5933 nrt6 = fen6_info->nsiblings + 1; 5934 5935 rt_arr = kcalloc(nrt6, sizeof(struct fib6_info *), GFP_ATOMIC); 5936 if (!rt_arr) 5937 return -ENOMEM; 5938 5939 fib6_work->rt_arr = rt_arr; 5940 fib6_work->nrt6 = nrt6; 5941 5942 rt_arr[0] = rt; 5943 fib6_info_hold(rt); 5944 5945 if (!fen6_info->nsiblings) 5946 return 0; 5947 5948 list_for_each_entry(iter, &rt->fib6_siblings, fib6_siblings) { 5949 if (i == fen6_info->nsiblings) 5950 break; 5951 5952 rt_arr[i + 1] = iter; 5953 fib6_info_hold(iter); 5954 i++; 5955 } 5956 WARN_ON_ONCE(i != fen6_info->nsiblings); 5957 5958 return 0; 5959 } 5960 5961 static void 5962 mlxsw_sp_router_fib6_work_fini(struct mlxsw_sp_fib6_event_work *fib6_work) 5963 { 5964 int i; 5965 5966 for (i = 0; i < fib6_work->nrt6; i++) 5967 mlxsw_sp_rt6_release(fib6_work->rt_arr[i]); 5968 kfree(fib6_work->rt_arr); 5969 } 5970 5971 static void mlxsw_sp_router_fib4_event_work(struct work_struct *work) 5972 { 5973 struct mlxsw_sp_fib_event_work *fib_work = 5974 container_of(work, struct mlxsw_sp_fib_event_work, work); 5975 struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; 5976 int err; 5977 5978 mutex_lock(&mlxsw_sp->router->lock); 5979 mlxsw_sp_span_respin(mlxsw_sp); 5980 5981 switch (fib_work->event) { 5982 case FIB_EVENT_ENTRY_REPLACE: 5983 err = mlxsw_sp_router_fib4_replace(mlxsw_sp, 5984 &fib_work->fen_info); 5985 if (err) 5986 mlxsw_sp_router_fib_abort(mlxsw_sp); 5987 fib_info_put(fib_work->fen_info.fi); 5988 break; 5989 case FIB_EVENT_ENTRY_DEL: 5990 mlxsw_sp_router_fib4_del(mlxsw_sp, &fib_work->fen_info); 5991 fib_info_put(fib_work->fen_info.fi); 5992 break; 5993 case FIB_EVENT_NH_ADD: 5994 case FIB_EVENT_NH_DEL: 5995 mlxsw_sp_nexthop4_event(mlxsw_sp, fib_work->event, 5996 fib_work->fnh_info.fib_nh); 5997 fib_info_put(fib_work->fnh_info.fib_nh->nh_parent); 5998 break; 5999 } 6000 mutex_unlock(&mlxsw_sp->router->lock); 6001 kfree(fib_work); 6002 } 6003 6004 static void mlxsw_sp_router_fib6_event_work(struct work_struct *work) 6005 { 6006 struct mlxsw_sp_fib_event_work *fib_work = 6007 container_of(work, struct mlxsw_sp_fib_event_work, work); 6008 struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; 6009 int err; 6010 6011 mutex_lock(&mlxsw_sp->router->lock); 6012 mlxsw_sp_span_respin(mlxsw_sp); 6013 6014 switch (fib_work->event) { 6015 case FIB_EVENT_ENTRY_REPLACE: 6016 err = mlxsw_sp_router_fib6_replace(mlxsw_sp, 6017 fib_work->fib6_work.rt_arr, 6018 fib_work->fib6_work.nrt6); 6019 if (err) 6020 mlxsw_sp_router_fib_abort(mlxsw_sp); 6021 mlxsw_sp_router_fib6_work_fini(&fib_work->fib6_work); 6022 break; 6023 case FIB_EVENT_ENTRY_APPEND: 6024 err = mlxsw_sp_router_fib6_append(mlxsw_sp, 6025 fib_work->fib6_work.rt_arr, 6026 fib_work->fib6_work.nrt6); 6027 if (err) 6028 mlxsw_sp_router_fib_abort(mlxsw_sp); 6029 mlxsw_sp_router_fib6_work_fini(&fib_work->fib6_work); 6030 break; 6031 case FIB_EVENT_ENTRY_DEL: 6032 mlxsw_sp_router_fib6_del(mlxsw_sp, 6033 fib_work->fib6_work.rt_arr, 6034 fib_work->fib6_work.nrt6); 6035 mlxsw_sp_router_fib6_work_fini(&fib_work->fib6_work); 6036 break; 6037 } 6038 mutex_unlock(&mlxsw_sp->router->lock); 6039 kfree(fib_work); 6040 } 6041 6042 static void mlxsw_sp_router_fibmr_event_work(struct work_struct *work) 6043 { 6044 struct mlxsw_sp_fib_event_work *fib_work = 6045 container_of(work, struct mlxsw_sp_fib_event_work, work); 6046 struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; 6047 bool replace; 6048 int err; 6049 6050 rtnl_lock(); 6051 mutex_lock(&mlxsw_sp->router->lock); 6052 switch (fib_work->event) { 6053 case FIB_EVENT_ENTRY_REPLACE: 6054 case FIB_EVENT_ENTRY_ADD: 6055 replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE; 6056 6057 err = mlxsw_sp_router_fibmr_add(mlxsw_sp, &fib_work->men_info, 6058 replace); 6059 if (err) 6060 mlxsw_sp_router_fib_abort(mlxsw_sp); 6061 mr_cache_put(fib_work->men_info.mfc); 6062 break; 6063 case FIB_EVENT_ENTRY_DEL: 6064 mlxsw_sp_router_fibmr_del(mlxsw_sp, &fib_work->men_info); 6065 mr_cache_put(fib_work->men_info.mfc); 6066 break; 6067 case FIB_EVENT_VIF_ADD: 6068 err = mlxsw_sp_router_fibmr_vif_add(mlxsw_sp, 6069 &fib_work->ven_info); 6070 if (err) 6071 mlxsw_sp_router_fib_abort(mlxsw_sp); 6072 dev_put(fib_work->ven_info.dev); 6073 break; 6074 case FIB_EVENT_VIF_DEL: 6075 mlxsw_sp_router_fibmr_vif_del(mlxsw_sp, 6076 &fib_work->ven_info); 6077 dev_put(fib_work->ven_info.dev); 6078 break; 6079 } 6080 mutex_unlock(&mlxsw_sp->router->lock); 6081 rtnl_unlock(); 6082 kfree(fib_work); 6083 } 6084 6085 static void mlxsw_sp_router_fib4_event(struct mlxsw_sp_fib_event_work *fib_work, 6086 struct fib_notifier_info *info) 6087 { 6088 struct fib_entry_notifier_info *fen_info; 6089 struct fib_nh_notifier_info *fnh_info; 6090 6091 switch (fib_work->event) { 6092 case FIB_EVENT_ENTRY_REPLACE: 6093 case FIB_EVENT_ENTRY_DEL: 6094 fen_info = container_of(info, struct fib_entry_notifier_info, 6095 info); 6096 fib_work->fen_info = *fen_info; 6097 /* Take reference on fib_info to prevent it from being 6098 * freed while work is queued. Release it afterwards. 6099 */ 6100 fib_info_hold(fib_work->fen_info.fi); 6101 break; 6102 case FIB_EVENT_NH_ADD: 6103 case FIB_EVENT_NH_DEL: 6104 fnh_info = container_of(info, struct fib_nh_notifier_info, 6105 info); 6106 fib_work->fnh_info = *fnh_info; 6107 fib_info_hold(fib_work->fnh_info.fib_nh->nh_parent); 6108 break; 6109 } 6110 } 6111 6112 static int mlxsw_sp_router_fib6_event(struct mlxsw_sp_fib_event_work *fib_work, 6113 struct fib_notifier_info *info) 6114 { 6115 struct fib6_entry_notifier_info *fen6_info; 6116 int err; 6117 6118 switch (fib_work->event) { 6119 case FIB_EVENT_ENTRY_REPLACE: 6120 case FIB_EVENT_ENTRY_APPEND: 6121 case FIB_EVENT_ENTRY_DEL: 6122 fen6_info = container_of(info, struct fib6_entry_notifier_info, 6123 info); 6124 err = mlxsw_sp_router_fib6_work_init(&fib_work->fib6_work, 6125 fen6_info); 6126 if (err) 6127 return err; 6128 break; 6129 } 6130 6131 return 0; 6132 } 6133 6134 static void 6135 mlxsw_sp_router_fibmr_event(struct mlxsw_sp_fib_event_work *fib_work, 6136 struct fib_notifier_info *info) 6137 { 6138 switch (fib_work->event) { 6139 case FIB_EVENT_ENTRY_REPLACE: 6140 case FIB_EVENT_ENTRY_ADD: 6141 case FIB_EVENT_ENTRY_DEL: 6142 memcpy(&fib_work->men_info, info, sizeof(fib_work->men_info)); 6143 mr_cache_hold(fib_work->men_info.mfc); 6144 break; 6145 case FIB_EVENT_VIF_ADD: 6146 case FIB_EVENT_VIF_DEL: 6147 memcpy(&fib_work->ven_info, info, sizeof(fib_work->ven_info)); 6148 dev_hold(fib_work->ven_info.dev); 6149 break; 6150 } 6151 } 6152 6153 static int mlxsw_sp_router_fib_rule_event(unsigned long event, 6154 struct fib_notifier_info *info, 6155 struct mlxsw_sp *mlxsw_sp) 6156 { 6157 struct netlink_ext_ack *extack = info->extack; 6158 struct fib_rule_notifier_info *fr_info; 6159 struct fib_rule *rule; 6160 int err = 0; 6161 6162 /* nothing to do at the moment */ 6163 if (event == FIB_EVENT_RULE_DEL) 6164 return 0; 6165 6166 if (mlxsw_sp->router->aborted) 6167 return 0; 6168 6169 fr_info = container_of(info, struct fib_rule_notifier_info, info); 6170 rule = fr_info->rule; 6171 6172 /* Rule only affects locally generated traffic */ 6173 if (rule->iifindex == mlxsw_sp_net(mlxsw_sp)->loopback_dev->ifindex) 6174 return 0; 6175 6176 switch (info->family) { 6177 case AF_INET: 6178 if (!fib4_rule_default(rule) && !rule->l3mdev) 6179 err = -EOPNOTSUPP; 6180 break; 6181 case AF_INET6: 6182 if (!fib6_rule_default(rule) && !rule->l3mdev) 6183 err = -EOPNOTSUPP; 6184 break; 6185 case RTNL_FAMILY_IPMR: 6186 if (!ipmr_rule_default(rule) && !rule->l3mdev) 6187 err = -EOPNOTSUPP; 6188 break; 6189 case RTNL_FAMILY_IP6MR: 6190 if (!ip6mr_rule_default(rule) && !rule->l3mdev) 6191 err = -EOPNOTSUPP; 6192 break; 6193 } 6194 6195 if (err < 0) 6196 NL_SET_ERR_MSG_MOD(extack, "FIB rules not supported"); 6197 6198 return err; 6199 } 6200 6201 /* Called with rcu_read_lock() */ 6202 static int mlxsw_sp_router_fib_event(struct notifier_block *nb, 6203 unsigned long event, void *ptr) 6204 { 6205 struct mlxsw_sp_fib_event_work *fib_work; 6206 struct fib_notifier_info *info = ptr; 6207 struct mlxsw_sp_router *router; 6208 int err; 6209 6210 if ((info->family != AF_INET && info->family != AF_INET6 && 6211 info->family != RTNL_FAMILY_IPMR && 6212 info->family != RTNL_FAMILY_IP6MR)) 6213 return NOTIFY_DONE; 6214 6215 router = container_of(nb, struct mlxsw_sp_router, fib_nb); 6216 6217 switch (event) { 6218 case FIB_EVENT_RULE_ADD: 6219 case FIB_EVENT_RULE_DEL: 6220 err = mlxsw_sp_router_fib_rule_event(event, info, 6221 router->mlxsw_sp); 6222 return notifier_from_errno(err); 6223 case FIB_EVENT_ENTRY_ADD: 6224 case FIB_EVENT_ENTRY_REPLACE: 6225 case FIB_EVENT_ENTRY_APPEND: 6226 if (router->aborted) { 6227 NL_SET_ERR_MSG_MOD(info->extack, "FIB offload was aborted. Not configuring route"); 6228 return notifier_from_errno(-EINVAL); 6229 } 6230 if (info->family == AF_INET) { 6231 struct fib_entry_notifier_info *fen_info = ptr; 6232 6233 if (fen_info->fi->fib_nh_is_v6) { 6234 NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported"); 6235 return notifier_from_errno(-EINVAL); 6236 } 6237 if (fen_info->fi->nh) { 6238 NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported"); 6239 return notifier_from_errno(-EINVAL); 6240 } 6241 } else if (info->family == AF_INET6) { 6242 struct fib6_entry_notifier_info *fen6_info; 6243 6244 fen6_info = container_of(info, 6245 struct fib6_entry_notifier_info, 6246 info); 6247 if (fen6_info->rt->nh) { 6248 NL_SET_ERR_MSG_MOD(info->extack, "IPv6 route with nexthop objects is not supported"); 6249 return notifier_from_errno(-EINVAL); 6250 } 6251 } 6252 break; 6253 } 6254 6255 fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC); 6256 if (!fib_work) 6257 return NOTIFY_BAD; 6258 6259 fib_work->mlxsw_sp = router->mlxsw_sp; 6260 fib_work->event = event; 6261 6262 switch (info->family) { 6263 case AF_INET: 6264 INIT_WORK(&fib_work->work, mlxsw_sp_router_fib4_event_work); 6265 mlxsw_sp_router_fib4_event(fib_work, info); 6266 break; 6267 case AF_INET6: 6268 INIT_WORK(&fib_work->work, mlxsw_sp_router_fib6_event_work); 6269 err = mlxsw_sp_router_fib6_event(fib_work, info); 6270 if (err) 6271 goto err_fib_event; 6272 break; 6273 case RTNL_FAMILY_IP6MR: 6274 case RTNL_FAMILY_IPMR: 6275 INIT_WORK(&fib_work->work, mlxsw_sp_router_fibmr_event_work); 6276 mlxsw_sp_router_fibmr_event(fib_work, info); 6277 break; 6278 } 6279 6280 mlxsw_core_schedule_work(&fib_work->work); 6281 6282 return NOTIFY_DONE; 6283 6284 err_fib_event: 6285 kfree(fib_work); 6286 return NOTIFY_BAD; 6287 } 6288 6289 static struct mlxsw_sp_rif * 6290 mlxsw_sp_rif_find_by_dev(const struct mlxsw_sp *mlxsw_sp, 6291 const struct net_device *dev) 6292 { 6293 int i; 6294 6295 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) 6296 if (mlxsw_sp->router->rifs[i] && 6297 mlxsw_sp->router->rifs[i]->dev == dev) 6298 return mlxsw_sp->router->rifs[i]; 6299 6300 return NULL; 6301 } 6302 6303 bool mlxsw_sp_rif_exists(struct mlxsw_sp *mlxsw_sp, 6304 const struct net_device *dev) 6305 { 6306 struct mlxsw_sp_rif *rif; 6307 6308 mutex_lock(&mlxsw_sp->router->lock); 6309 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 6310 mutex_unlock(&mlxsw_sp->router->lock); 6311 6312 return rif; 6313 } 6314 6315 u16 mlxsw_sp_rif_vid(struct mlxsw_sp *mlxsw_sp, const struct net_device *dev) 6316 { 6317 struct mlxsw_sp_rif *rif; 6318 u16 vid = 0; 6319 6320 mutex_lock(&mlxsw_sp->router->lock); 6321 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 6322 if (!rif) 6323 goto out; 6324 6325 /* We only return the VID for VLAN RIFs. Otherwise we return an 6326 * invalid value (0). 6327 */ 6328 if (rif->ops->type != MLXSW_SP_RIF_TYPE_VLAN) 6329 goto out; 6330 6331 vid = mlxsw_sp_fid_8021q_vid(rif->fid); 6332 6333 out: 6334 mutex_unlock(&mlxsw_sp->router->lock); 6335 return vid; 6336 } 6337 6338 static int mlxsw_sp_router_rif_disable(struct mlxsw_sp *mlxsw_sp, u16 rif) 6339 { 6340 char ritr_pl[MLXSW_REG_RITR_LEN]; 6341 int err; 6342 6343 mlxsw_reg_ritr_rif_pack(ritr_pl, rif); 6344 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6345 if (err) 6346 return err; 6347 6348 mlxsw_reg_ritr_enable_set(ritr_pl, false); 6349 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6350 } 6351 6352 static void mlxsw_sp_router_rif_gone_sync(struct mlxsw_sp *mlxsw_sp, 6353 struct mlxsw_sp_rif *rif) 6354 { 6355 mlxsw_sp_router_rif_disable(mlxsw_sp, rif->rif_index); 6356 mlxsw_sp_nexthop_rif_gone_sync(mlxsw_sp, rif); 6357 mlxsw_sp_neigh_rif_gone_sync(mlxsw_sp, rif); 6358 } 6359 6360 static bool 6361 mlxsw_sp_rif_should_config(struct mlxsw_sp_rif *rif, struct net_device *dev, 6362 unsigned long event) 6363 { 6364 struct inet6_dev *inet6_dev; 6365 bool addr_list_empty = true; 6366 struct in_device *idev; 6367 6368 switch (event) { 6369 case NETDEV_UP: 6370 return rif == NULL; 6371 case NETDEV_DOWN: 6372 rcu_read_lock(); 6373 idev = __in_dev_get_rcu(dev); 6374 if (idev && idev->ifa_list) 6375 addr_list_empty = false; 6376 6377 inet6_dev = __in6_dev_get(dev); 6378 if (addr_list_empty && inet6_dev && 6379 !list_empty(&inet6_dev->addr_list)) 6380 addr_list_empty = false; 6381 rcu_read_unlock(); 6382 6383 /* macvlans do not have a RIF, but rather piggy back on the 6384 * RIF of their lower device. 6385 */ 6386 if (netif_is_macvlan(dev) && addr_list_empty) 6387 return true; 6388 6389 if (rif && addr_list_empty && 6390 !netif_is_l3_slave(rif->dev)) 6391 return true; 6392 /* It is possible we already removed the RIF ourselves 6393 * if it was assigned to a netdev that is now a bridge 6394 * or LAG slave. 6395 */ 6396 return false; 6397 } 6398 6399 return false; 6400 } 6401 6402 static enum mlxsw_sp_rif_type 6403 mlxsw_sp_dev_rif_type(const struct mlxsw_sp *mlxsw_sp, 6404 const struct net_device *dev) 6405 { 6406 enum mlxsw_sp_fid_type type; 6407 6408 if (mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL)) 6409 return MLXSW_SP_RIF_TYPE_IPIP_LB; 6410 6411 /* Otherwise RIF type is derived from the type of the underlying FID. */ 6412 if (is_vlan_dev(dev) && netif_is_bridge_master(vlan_dev_real_dev(dev))) 6413 type = MLXSW_SP_FID_TYPE_8021Q; 6414 else if (netif_is_bridge_master(dev) && br_vlan_enabled(dev)) 6415 type = MLXSW_SP_FID_TYPE_8021Q; 6416 else if (netif_is_bridge_master(dev)) 6417 type = MLXSW_SP_FID_TYPE_8021D; 6418 else 6419 type = MLXSW_SP_FID_TYPE_RFID; 6420 6421 return mlxsw_sp_fid_type_rif_type(mlxsw_sp, type); 6422 } 6423 6424 static int mlxsw_sp_rif_index_alloc(struct mlxsw_sp *mlxsw_sp, u16 *p_rif_index) 6425 { 6426 int i; 6427 6428 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) { 6429 if (!mlxsw_sp->router->rifs[i]) { 6430 *p_rif_index = i; 6431 return 0; 6432 } 6433 } 6434 6435 return -ENOBUFS; 6436 } 6437 6438 static struct mlxsw_sp_rif *mlxsw_sp_rif_alloc(size_t rif_size, u16 rif_index, 6439 u16 vr_id, 6440 struct net_device *l3_dev) 6441 { 6442 struct mlxsw_sp_rif *rif; 6443 6444 rif = kzalloc(rif_size, GFP_KERNEL); 6445 if (!rif) 6446 return NULL; 6447 6448 INIT_LIST_HEAD(&rif->nexthop_list); 6449 INIT_LIST_HEAD(&rif->neigh_list); 6450 if (l3_dev) { 6451 ether_addr_copy(rif->addr, l3_dev->dev_addr); 6452 rif->mtu = l3_dev->mtu; 6453 rif->dev = l3_dev; 6454 } 6455 rif->vr_id = vr_id; 6456 rif->rif_index = rif_index; 6457 6458 return rif; 6459 } 6460 6461 struct mlxsw_sp_rif *mlxsw_sp_rif_by_index(const struct mlxsw_sp *mlxsw_sp, 6462 u16 rif_index) 6463 { 6464 return mlxsw_sp->router->rifs[rif_index]; 6465 } 6466 6467 u16 mlxsw_sp_rif_index(const struct mlxsw_sp_rif *rif) 6468 { 6469 return rif->rif_index; 6470 } 6471 6472 u16 mlxsw_sp_ipip_lb_rif_index(const struct mlxsw_sp_rif_ipip_lb *lb_rif) 6473 { 6474 return lb_rif->common.rif_index; 6475 } 6476 6477 u16 mlxsw_sp_ipip_lb_ul_vr_id(const struct mlxsw_sp_rif_ipip_lb *lb_rif) 6478 { 6479 u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(lb_rif->common.dev); 6480 struct mlxsw_sp_vr *ul_vr; 6481 6482 ul_vr = mlxsw_sp_vr_get(lb_rif->common.mlxsw_sp, ul_tb_id, NULL); 6483 if (WARN_ON(IS_ERR(ul_vr))) 6484 return 0; 6485 6486 return ul_vr->id; 6487 } 6488 6489 u16 mlxsw_sp_ipip_lb_ul_rif_id(const struct mlxsw_sp_rif_ipip_lb *lb_rif) 6490 { 6491 return lb_rif->ul_rif_id; 6492 } 6493 6494 int mlxsw_sp_rif_dev_ifindex(const struct mlxsw_sp_rif *rif) 6495 { 6496 return rif->dev->ifindex; 6497 } 6498 6499 const struct net_device *mlxsw_sp_rif_dev(const struct mlxsw_sp_rif *rif) 6500 { 6501 return rif->dev; 6502 } 6503 6504 static struct mlxsw_sp_rif * 6505 mlxsw_sp_rif_create(struct mlxsw_sp *mlxsw_sp, 6506 const struct mlxsw_sp_rif_params *params, 6507 struct netlink_ext_ack *extack) 6508 { 6509 u32 tb_id = l3mdev_fib_table(params->dev); 6510 const struct mlxsw_sp_rif_ops *ops; 6511 struct mlxsw_sp_fid *fid = NULL; 6512 enum mlxsw_sp_rif_type type; 6513 struct mlxsw_sp_rif *rif; 6514 struct mlxsw_sp_vr *vr; 6515 u16 rif_index; 6516 int i, err; 6517 6518 type = mlxsw_sp_dev_rif_type(mlxsw_sp, params->dev); 6519 ops = mlxsw_sp->rif_ops_arr[type]; 6520 6521 vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id ? : RT_TABLE_MAIN, extack); 6522 if (IS_ERR(vr)) 6523 return ERR_CAST(vr); 6524 vr->rif_count++; 6525 6526 err = mlxsw_sp_rif_index_alloc(mlxsw_sp, &rif_index); 6527 if (err) { 6528 NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported router interfaces"); 6529 goto err_rif_index_alloc; 6530 } 6531 6532 rif = mlxsw_sp_rif_alloc(ops->rif_size, rif_index, vr->id, params->dev); 6533 if (!rif) { 6534 err = -ENOMEM; 6535 goto err_rif_alloc; 6536 } 6537 dev_hold(rif->dev); 6538 mlxsw_sp->router->rifs[rif_index] = rif; 6539 rif->mlxsw_sp = mlxsw_sp; 6540 rif->ops = ops; 6541 6542 if (ops->fid_get) { 6543 fid = ops->fid_get(rif, extack); 6544 if (IS_ERR(fid)) { 6545 err = PTR_ERR(fid); 6546 goto err_fid_get; 6547 } 6548 rif->fid = fid; 6549 } 6550 6551 if (ops->setup) 6552 ops->setup(rif, params); 6553 6554 err = ops->configure(rif); 6555 if (err) 6556 goto err_configure; 6557 6558 for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) { 6559 err = mlxsw_sp_mr_rif_add(vr->mr_table[i], rif); 6560 if (err) 6561 goto err_mr_rif_add; 6562 } 6563 6564 mlxsw_sp_rif_counters_alloc(rif); 6565 6566 return rif; 6567 6568 err_mr_rif_add: 6569 for (i--; i >= 0; i--) 6570 mlxsw_sp_mr_rif_del(vr->mr_table[i], rif); 6571 ops->deconfigure(rif); 6572 err_configure: 6573 if (fid) 6574 mlxsw_sp_fid_put(fid); 6575 err_fid_get: 6576 mlxsw_sp->router->rifs[rif_index] = NULL; 6577 dev_put(rif->dev); 6578 kfree(rif); 6579 err_rif_alloc: 6580 err_rif_index_alloc: 6581 vr->rif_count--; 6582 mlxsw_sp_vr_put(mlxsw_sp, vr); 6583 return ERR_PTR(err); 6584 } 6585 6586 static void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif) 6587 { 6588 const struct mlxsw_sp_rif_ops *ops = rif->ops; 6589 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 6590 struct mlxsw_sp_fid *fid = rif->fid; 6591 struct mlxsw_sp_vr *vr; 6592 int i; 6593 6594 mlxsw_sp_router_rif_gone_sync(mlxsw_sp, rif); 6595 vr = &mlxsw_sp->router->vrs[rif->vr_id]; 6596 6597 mlxsw_sp_rif_counters_free(rif); 6598 for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) 6599 mlxsw_sp_mr_rif_del(vr->mr_table[i], rif); 6600 ops->deconfigure(rif); 6601 if (fid) 6602 /* Loopback RIFs are not associated with a FID. */ 6603 mlxsw_sp_fid_put(fid); 6604 mlxsw_sp->router->rifs[rif->rif_index] = NULL; 6605 dev_put(rif->dev); 6606 kfree(rif); 6607 vr->rif_count--; 6608 mlxsw_sp_vr_put(mlxsw_sp, vr); 6609 } 6610 6611 void mlxsw_sp_rif_destroy_by_dev(struct mlxsw_sp *mlxsw_sp, 6612 struct net_device *dev) 6613 { 6614 struct mlxsw_sp_rif *rif; 6615 6616 mutex_lock(&mlxsw_sp->router->lock); 6617 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 6618 if (!rif) 6619 goto out; 6620 mlxsw_sp_rif_destroy(rif); 6621 out: 6622 mutex_unlock(&mlxsw_sp->router->lock); 6623 } 6624 6625 static void 6626 mlxsw_sp_rif_subport_params_init(struct mlxsw_sp_rif_params *params, 6627 struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) 6628 { 6629 struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; 6630 6631 params->vid = mlxsw_sp_port_vlan->vid; 6632 params->lag = mlxsw_sp_port->lagged; 6633 if (params->lag) 6634 params->lag_id = mlxsw_sp_port->lag_id; 6635 else 6636 params->system_port = mlxsw_sp_port->local_port; 6637 } 6638 6639 static struct mlxsw_sp_rif_subport * 6640 mlxsw_sp_rif_subport_rif(const struct mlxsw_sp_rif *rif) 6641 { 6642 return container_of(rif, struct mlxsw_sp_rif_subport, common); 6643 } 6644 6645 static struct mlxsw_sp_rif * 6646 mlxsw_sp_rif_subport_get(struct mlxsw_sp *mlxsw_sp, 6647 const struct mlxsw_sp_rif_params *params, 6648 struct netlink_ext_ack *extack) 6649 { 6650 struct mlxsw_sp_rif_subport *rif_subport; 6651 struct mlxsw_sp_rif *rif; 6652 6653 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, params->dev); 6654 if (!rif) 6655 return mlxsw_sp_rif_create(mlxsw_sp, params, extack); 6656 6657 rif_subport = mlxsw_sp_rif_subport_rif(rif); 6658 refcount_inc(&rif_subport->ref_count); 6659 return rif; 6660 } 6661 6662 static void mlxsw_sp_rif_subport_put(struct mlxsw_sp_rif *rif) 6663 { 6664 struct mlxsw_sp_rif_subport *rif_subport; 6665 6666 rif_subport = mlxsw_sp_rif_subport_rif(rif); 6667 if (!refcount_dec_and_test(&rif_subport->ref_count)) 6668 return; 6669 6670 mlxsw_sp_rif_destroy(rif); 6671 } 6672 6673 static int 6674 mlxsw_sp_port_vlan_router_join(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan, 6675 struct net_device *l3_dev, 6676 struct netlink_ext_ack *extack) 6677 { 6678 struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; 6679 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp; 6680 struct mlxsw_sp_rif_params params = { 6681 .dev = l3_dev, 6682 }; 6683 u16 vid = mlxsw_sp_port_vlan->vid; 6684 struct mlxsw_sp_rif *rif; 6685 struct mlxsw_sp_fid *fid; 6686 int err; 6687 6688 mlxsw_sp_rif_subport_params_init(¶ms, mlxsw_sp_port_vlan); 6689 rif = mlxsw_sp_rif_subport_get(mlxsw_sp, ¶ms, extack); 6690 if (IS_ERR(rif)) 6691 return PTR_ERR(rif); 6692 6693 /* FID was already created, just take a reference */ 6694 fid = rif->ops->fid_get(rif, extack); 6695 err = mlxsw_sp_fid_port_vid_map(fid, mlxsw_sp_port, vid); 6696 if (err) 6697 goto err_fid_port_vid_map; 6698 6699 err = mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, false); 6700 if (err) 6701 goto err_port_vid_learning_set; 6702 6703 err = mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid, 6704 BR_STATE_FORWARDING); 6705 if (err) 6706 goto err_port_vid_stp_set; 6707 6708 mlxsw_sp_port_vlan->fid = fid; 6709 6710 return 0; 6711 6712 err_port_vid_stp_set: 6713 mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true); 6714 err_port_vid_learning_set: 6715 mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid); 6716 err_fid_port_vid_map: 6717 mlxsw_sp_fid_put(fid); 6718 mlxsw_sp_rif_subport_put(rif); 6719 return err; 6720 } 6721 6722 static void 6723 __mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) 6724 { 6725 struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; 6726 struct mlxsw_sp_fid *fid = mlxsw_sp_port_vlan->fid; 6727 struct mlxsw_sp_rif *rif = mlxsw_sp_fid_rif(fid); 6728 u16 vid = mlxsw_sp_port_vlan->vid; 6729 6730 if (WARN_ON(mlxsw_sp_fid_type(fid) != MLXSW_SP_FID_TYPE_RFID)) 6731 return; 6732 6733 mlxsw_sp_port_vlan->fid = NULL; 6734 mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid, BR_STATE_BLOCKING); 6735 mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true); 6736 mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid); 6737 mlxsw_sp_fid_put(fid); 6738 mlxsw_sp_rif_subport_put(rif); 6739 } 6740 6741 void 6742 mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) 6743 { 6744 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port_vlan->mlxsw_sp_port->mlxsw_sp; 6745 6746 mutex_lock(&mlxsw_sp->router->lock); 6747 __mlxsw_sp_port_vlan_router_leave(mlxsw_sp_port_vlan); 6748 mutex_unlock(&mlxsw_sp->router->lock); 6749 } 6750 6751 static int mlxsw_sp_inetaddr_port_vlan_event(struct net_device *l3_dev, 6752 struct net_device *port_dev, 6753 unsigned long event, u16 vid, 6754 struct netlink_ext_ack *extack) 6755 { 6756 struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(port_dev); 6757 struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan; 6758 6759 mlxsw_sp_port_vlan = mlxsw_sp_port_vlan_find_by_vid(mlxsw_sp_port, vid); 6760 if (WARN_ON(!mlxsw_sp_port_vlan)) 6761 return -EINVAL; 6762 6763 switch (event) { 6764 case NETDEV_UP: 6765 return mlxsw_sp_port_vlan_router_join(mlxsw_sp_port_vlan, 6766 l3_dev, extack); 6767 case NETDEV_DOWN: 6768 __mlxsw_sp_port_vlan_router_leave(mlxsw_sp_port_vlan); 6769 break; 6770 } 6771 6772 return 0; 6773 } 6774 6775 static int mlxsw_sp_inetaddr_port_event(struct net_device *port_dev, 6776 unsigned long event, 6777 struct netlink_ext_ack *extack) 6778 { 6779 if (netif_is_bridge_port(port_dev) || 6780 netif_is_lag_port(port_dev) || 6781 netif_is_ovs_port(port_dev)) 6782 return 0; 6783 6784 return mlxsw_sp_inetaddr_port_vlan_event(port_dev, port_dev, event, 6785 MLXSW_SP_DEFAULT_VID, extack); 6786 } 6787 6788 static int __mlxsw_sp_inetaddr_lag_event(struct net_device *l3_dev, 6789 struct net_device *lag_dev, 6790 unsigned long event, u16 vid, 6791 struct netlink_ext_ack *extack) 6792 { 6793 struct net_device *port_dev; 6794 struct list_head *iter; 6795 int err; 6796 6797 netdev_for_each_lower_dev(lag_dev, port_dev, iter) { 6798 if (mlxsw_sp_port_dev_check(port_dev)) { 6799 err = mlxsw_sp_inetaddr_port_vlan_event(l3_dev, 6800 port_dev, 6801 event, vid, 6802 extack); 6803 if (err) 6804 return err; 6805 } 6806 } 6807 6808 return 0; 6809 } 6810 6811 static int mlxsw_sp_inetaddr_lag_event(struct net_device *lag_dev, 6812 unsigned long event, 6813 struct netlink_ext_ack *extack) 6814 { 6815 if (netif_is_bridge_port(lag_dev)) 6816 return 0; 6817 6818 return __mlxsw_sp_inetaddr_lag_event(lag_dev, lag_dev, event, 6819 MLXSW_SP_DEFAULT_VID, extack); 6820 } 6821 6822 static int mlxsw_sp_inetaddr_bridge_event(struct mlxsw_sp *mlxsw_sp, 6823 struct net_device *l3_dev, 6824 unsigned long event, 6825 struct netlink_ext_ack *extack) 6826 { 6827 struct mlxsw_sp_rif_params params = { 6828 .dev = l3_dev, 6829 }; 6830 struct mlxsw_sp_rif *rif; 6831 6832 switch (event) { 6833 case NETDEV_UP: 6834 rif = mlxsw_sp_rif_create(mlxsw_sp, ¶ms, extack); 6835 if (IS_ERR(rif)) 6836 return PTR_ERR(rif); 6837 break; 6838 case NETDEV_DOWN: 6839 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 6840 mlxsw_sp_rif_destroy(rif); 6841 break; 6842 } 6843 6844 return 0; 6845 } 6846 6847 static int mlxsw_sp_inetaddr_vlan_event(struct mlxsw_sp *mlxsw_sp, 6848 struct net_device *vlan_dev, 6849 unsigned long event, 6850 struct netlink_ext_ack *extack) 6851 { 6852 struct net_device *real_dev = vlan_dev_real_dev(vlan_dev); 6853 u16 vid = vlan_dev_vlan_id(vlan_dev); 6854 6855 if (netif_is_bridge_port(vlan_dev)) 6856 return 0; 6857 6858 if (mlxsw_sp_port_dev_check(real_dev)) 6859 return mlxsw_sp_inetaddr_port_vlan_event(vlan_dev, real_dev, 6860 event, vid, extack); 6861 else if (netif_is_lag_master(real_dev)) 6862 return __mlxsw_sp_inetaddr_lag_event(vlan_dev, real_dev, event, 6863 vid, extack); 6864 else if (netif_is_bridge_master(real_dev) && br_vlan_enabled(real_dev)) 6865 return mlxsw_sp_inetaddr_bridge_event(mlxsw_sp, vlan_dev, event, 6866 extack); 6867 6868 return 0; 6869 } 6870 6871 static bool mlxsw_sp_rif_macvlan_is_vrrp4(const u8 *mac) 6872 { 6873 u8 vrrp4[ETH_ALEN] = { 0x00, 0x00, 0x5e, 0x00, 0x01, 0x00 }; 6874 u8 mask[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }; 6875 6876 return ether_addr_equal_masked(mac, vrrp4, mask); 6877 } 6878 6879 static bool mlxsw_sp_rif_macvlan_is_vrrp6(const u8 *mac) 6880 { 6881 u8 vrrp6[ETH_ALEN] = { 0x00, 0x00, 0x5e, 0x00, 0x02, 0x00 }; 6882 u8 mask[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }; 6883 6884 return ether_addr_equal_masked(mac, vrrp6, mask); 6885 } 6886 6887 static int mlxsw_sp_rif_vrrp_op(struct mlxsw_sp *mlxsw_sp, u16 rif_index, 6888 const u8 *mac, bool adding) 6889 { 6890 char ritr_pl[MLXSW_REG_RITR_LEN]; 6891 u8 vrrp_id = adding ? mac[5] : 0; 6892 int err; 6893 6894 if (!mlxsw_sp_rif_macvlan_is_vrrp4(mac) && 6895 !mlxsw_sp_rif_macvlan_is_vrrp6(mac)) 6896 return 0; 6897 6898 mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index); 6899 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6900 if (err) 6901 return err; 6902 6903 if (mlxsw_sp_rif_macvlan_is_vrrp4(mac)) 6904 mlxsw_reg_ritr_if_vrrp_id_ipv4_set(ritr_pl, vrrp_id); 6905 else 6906 mlxsw_reg_ritr_if_vrrp_id_ipv6_set(ritr_pl, vrrp_id); 6907 6908 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6909 } 6910 6911 static int mlxsw_sp_rif_macvlan_add(struct mlxsw_sp *mlxsw_sp, 6912 const struct net_device *macvlan_dev, 6913 struct netlink_ext_ack *extack) 6914 { 6915 struct macvlan_dev *vlan = netdev_priv(macvlan_dev); 6916 struct mlxsw_sp_rif *rif; 6917 int err; 6918 6919 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, vlan->lowerdev); 6920 if (!rif) { 6921 NL_SET_ERR_MSG_MOD(extack, "macvlan is only supported on top of router interfaces"); 6922 return -EOPNOTSUPP; 6923 } 6924 6925 err = mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr, 6926 mlxsw_sp_fid_index(rif->fid), true); 6927 if (err) 6928 return err; 6929 6930 err = mlxsw_sp_rif_vrrp_op(mlxsw_sp, rif->rif_index, 6931 macvlan_dev->dev_addr, true); 6932 if (err) 6933 goto err_rif_vrrp_add; 6934 6935 /* Make sure the bridge driver does not have this MAC pointing at 6936 * some other port. 6937 */ 6938 if (rif->ops->fdb_del) 6939 rif->ops->fdb_del(rif, macvlan_dev->dev_addr); 6940 6941 return 0; 6942 6943 err_rif_vrrp_add: 6944 mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr, 6945 mlxsw_sp_fid_index(rif->fid), false); 6946 return err; 6947 } 6948 6949 static void __mlxsw_sp_rif_macvlan_del(struct mlxsw_sp *mlxsw_sp, 6950 const struct net_device *macvlan_dev) 6951 { 6952 struct macvlan_dev *vlan = netdev_priv(macvlan_dev); 6953 struct mlxsw_sp_rif *rif; 6954 6955 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, vlan->lowerdev); 6956 /* If we do not have a RIF, then we already took care of 6957 * removing the macvlan's MAC during RIF deletion. 6958 */ 6959 if (!rif) 6960 return; 6961 mlxsw_sp_rif_vrrp_op(mlxsw_sp, rif->rif_index, macvlan_dev->dev_addr, 6962 false); 6963 mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr, 6964 mlxsw_sp_fid_index(rif->fid), false); 6965 } 6966 6967 void mlxsw_sp_rif_macvlan_del(struct mlxsw_sp *mlxsw_sp, 6968 const struct net_device *macvlan_dev) 6969 { 6970 mutex_lock(&mlxsw_sp->router->lock); 6971 __mlxsw_sp_rif_macvlan_del(mlxsw_sp, macvlan_dev); 6972 mutex_unlock(&mlxsw_sp->router->lock); 6973 } 6974 6975 static int mlxsw_sp_inetaddr_macvlan_event(struct mlxsw_sp *mlxsw_sp, 6976 struct net_device *macvlan_dev, 6977 unsigned long event, 6978 struct netlink_ext_ack *extack) 6979 { 6980 switch (event) { 6981 case NETDEV_UP: 6982 return mlxsw_sp_rif_macvlan_add(mlxsw_sp, macvlan_dev, extack); 6983 case NETDEV_DOWN: 6984 __mlxsw_sp_rif_macvlan_del(mlxsw_sp, macvlan_dev); 6985 break; 6986 } 6987 6988 return 0; 6989 } 6990 6991 static int mlxsw_sp_router_port_check_rif_addr(struct mlxsw_sp *mlxsw_sp, 6992 struct net_device *dev, 6993 const unsigned char *dev_addr, 6994 struct netlink_ext_ack *extack) 6995 { 6996 struct mlxsw_sp_rif *rif; 6997 int i; 6998 6999 /* A RIF is not created for macvlan netdevs. Their MAC is used to 7000 * populate the FDB 7001 */ 7002 if (netif_is_macvlan(dev) || netif_is_l3_master(dev)) 7003 return 0; 7004 7005 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) { 7006 rif = mlxsw_sp->router->rifs[i]; 7007 if (rif && rif->ops && 7008 rif->ops->type == MLXSW_SP_RIF_TYPE_IPIP_LB) 7009 continue; 7010 if (rif && rif->dev && rif->dev != dev && 7011 !ether_addr_equal_masked(rif->dev->dev_addr, dev_addr, 7012 mlxsw_sp->mac_mask)) { 7013 NL_SET_ERR_MSG_MOD(extack, "All router interface MAC addresses must have the same prefix"); 7014 return -EINVAL; 7015 } 7016 } 7017 7018 return 0; 7019 } 7020 7021 static int __mlxsw_sp_inetaddr_event(struct mlxsw_sp *mlxsw_sp, 7022 struct net_device *dev, 7023 unsigned long event, 7024 struct netlink_ext_ack *extack) 7025 { 7026 if (mlxsw_sp_port_dev_check(dev)) 7027 return mlxsw_sp_inetaddr_port_event(dev, event, extack); 7028 else if (netif_is_lag_master(dev)) 7029 return mlxsw_sp_inetaddr_lag_event(dev, event, extack); 7030 else if (netif_is_bridge_master(dev)) 7031 return mlxsw_sp_inetaddr_bridge_event(mlxsw_sp, dev, event, 7032 extack); 7033 else if (is_vlan_dev(dev)) 7034 return mlxsw_sp_inetaddr_vlan_event(mlxsw_sp, dev, event, 7035 extack); 7036 else if (netif_is_macvlan(dev)) 7037 return mlxsw_sp_inetaddr_macvlan_event(mlxsw_sp, dev, event, 7038 extack); 7039 else 7040 return 0; 7041 } 7042 7043 static int mlxsw_sp_inetaddr_event(struct notifier_block *nb, 7044 unsigned long event, void *ptr) 7045 { 7046 struct in_ifaddr *ifa = (struct in_ifaddr *) ptr; 7047 struct net_device *dev = ifa->ifa_dev->dev; 7048 struct mlxsw_sp_router *router; 7049 struct mlxsw_sp_rif *rif; 7050 int err = 0; 7051 7052 /* NETDEV_UP event is handled by mlxsw_sp_inetaddr_valid_event */ 7053 if (event == NETDEV_UP) 7054 return NOTIFY_DONE; 7055 7056 router = container_of(nb, struct mlxsw_sp_router, inetaddr_nb); 7057 mutex_lock(&router->lock); 7058 rif = mlxsw_sp_rif_find_by_dev(router->mlxsw_sp, dev); 7059 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 7060 goto out; 7061 7062 err = __mlxsw_sp_inetaddr_event(router->mlxsw_sp, dev, event, NULL); 7063 out: 7064 mutex_unlock(&router->lock); 7065 return notifier_from_errno(err); 7066 } 7067 7068 int mlxsw_sp_inetaddr_valid_event(struct notifier_block *unused, 7069 unsigned long event, void *ptr) 7070 { 7071 struct in_validator_info *ivi = (struct in_validator_info *) ptr; 7072 struct net_device *dev = ivi->ivi_dev->dev; 7073 struct mlxsw_sp *mlxsw_sp; 7074 struct mlxsw_sp_rif *rif; 7075 int err = 0; 7076 7077 mlxsw_sp = mlxsw_sp_lower_get(dev); 7078 if (!mlxsw_sp) 7079 return NOTIFY_DONE; 7080 7081 mutex_lock(&mlxsw_sp->router->lock); 7082 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 7083 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 7084 goto out; 7085 7086 err = mlxsw_sp_router_port_check_rif_addr(mlxsw_sp, dev, dev->dev_addr, 7087 ivi->extack); 7088 if (err) 7089 goto out; 7090 7091 err = __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, ivi->extack); 7092 out: 7093 mutex_unlock(&mlxsw_sp->router->lock); 7094 return notifier_from_errno(err); 7095 } 7096 7097 struct mlxsw_sp_inet6addr_event_work { 7098 struct work_struct work; 7099 struct mlxsw_sp *mlxsw_sp; 7100 struct net_device *dev; 7101 unsigned long event; 7102 }; 7103 7104 static void mlxsw_sp_inet6addr_event_work(struct work_struct *work) 7105 { 7106 struct mlxsw_sp_inet6addr_event_work *inet6addr_work = 7107 container_of(work, struct mlxsw_sp_inet6addr_event_work, work); 7108 struct mlxsw_sp *mlxsw_sp = inet6addr_work->mlxsw_sp; 7109 struct net_device *dev = inet6addr_work->dev; 7110 unsigned long event = inet6addr_work->event; 7111 struct mlxsw_sp_rif *rif; 7112 7113 rtnl_lock(); 7114 mutex_lock(&mlxsw_sp->router->lock); 7115 7116 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 7117 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 7118 goto out; 7119 7120 __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, NULL); 7121 out: 7122 mutex_unlock(&mlxsw_sp->router->lock); 7123 rtnl_unlock(); 7124 dev_put(dev); 7125 kfree(inet6addr_work); 7126 } 7127 7128 /* Called with rcu_read_lock() */ 7129 static int mlxsw_sp_inet6addr_event(struct notifier_block *nb, 7130 unsigned long event, void *ptr) 7131 { 7132 struct inet6_ifaddr *if6 = (struct inet6_ifaddr *) ptr; 7133 struct mlxsw_sp_inet6addr_event_work *inet6addr_work; 7134 struct net_device *dev = if6->idev->dev; 7135 struct mlxsw_sp_router *router; 7136 7137 /* NETDEV_UP event is handled by mlxsw_sp_inet6addr_valid_event */ 7138 if (event == NETDEV_UP) 7139 return NOTIFY_DONE; 7140 7141 inet6addr_work = kzalloc(sizeof(*inet6addr_work), GFP_ATOMIC); 7142 if (!inet6addr_work) 7143 return NOTIFY_BAD; 7144 7145 router = container_of(nb, struct mlxsw_sp_router, inet6addr_nb); 7146 INIT_WORK(&inet6addr_work->work, mlxsw_sp_inet6addr_event_work); 7147 inet6addr_work->mlxsw_sp = router->mlxsw_sp; 7148 inet6addr_work->dev = dev; 7149 inet6addr_work->event = event; 7150 dev_hold(dev); 7151 mlxsw_core_schedule_work(&inet6addr_work->work); 7152 7153 return NOTIFY_DONE; 7154 } 7155 7156 int mlxsw_sp_inet6addr_valid_event(struct notifier_block *unused, 7157 unsigned long event, void *ptr) 7158 { 7159 struct in6_validator_info *i6vi = (struct in6_validator_info *) ptr; 7160 struct net_device *dev = i6vi->i6vi_dev->dev; 7161 struct mlxsw_sp *mlxsw_sp; 7162 struct mlxsw_sp_rif *rif; 7163 int err = 0; 7164 7165 mlxsw_sp = mlxsw_sp_lower_get(dev); 7166 if (!mlxsw_sp) 7167 return NOTIFY_DONE; 7168 7169 mutex_lock(&mlxsw_sp->router->lock); 7170 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 7171 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 7172 goto out; 7173 7174 err = mlxsw_sp_router_port_check_rif_addr(mlxsw_sp, dev, dev->dev_addr, 7175 i6vi->extack); 7176 if (err) 7177 goto out; 7178 7179 err = __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, i6vi->extack); 7180 out: 7181 mutex_unlock(&mlxsw_sp->router->lock); 7182 return notifier_from_errno(err); 7183 } 7184 7185 static int mlxsw_sp_rif_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index, 7186 const char *mac, int mtu) 7187 { 7188 char ritr_pl[MLXSW_REG_RITR_LEN]; 7189 int err; 7190 7191 mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index); 7192 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7193 if (err) 7194 return err; 7195 7196 mlxsw_reg_ritr_mtu_set(ritr_pl, mtu); 7197 mlxsw_reg_ritr_if_mac_memcpy_to(ritr_pl, mac); 7198 mlxsw_reg_ritr_op_set(ritr_pl, MLXSW_REG_RITR_RIF_CREATE); 7199 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7200 } 7201 7202 static int 7203 mlxsw_sp_router_port_change_event(struct mlxsw_sp *mlxsw_sp, 7204 struct mlxsw_sp_rif *rif) 7205 { 7206 struct net_device *dev = rif->dev; 7207 u16 fid_index; 7208 int err; 7209 7210 fid_index = mlxsw_sp_fid_index(rif->fid); 7211 7212 err = mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, false); 7213 if (err) 7214 return err; 7215 7216 err = mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, dev->dev_addr, 7217 dev->mtu); 7218 if (err) 7219 goto err_rif_edit; 7220 7221 err = mlxsw_sp_rif_fdb_op(mlxsw_sp, dev->dev_addr, fid_index, true); 7222 if (err) 7223 goto err_rif_fdb_op; 7224 7225 if (rif->mtu != dev->mtu) { 7226 struct mlxsw_sp_vr *vr; 7227 int i; 7228 7229 /* The RIF is relevant only to its mr_table instance, as unlike 7230 * unicast routing, in multicast routing a RIF cannot be shared 7231 * between several multicast routing tables. 7232 */ 7233 vr = &mlxsw_sp->router->vrs[rif->vr_id]; 7234 for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) 7235 mlxsw_sp_mr_rif_mtu_update(vr->mr_table[i], 7236 rif, dev->mtu); 7237 } 7238 7239 ether_addr_copy(rif->addr, dev->dev_addr); 7240 rif->mtu = dev->mtu; 7241 7242 netdev_dbg(dev, "Updated RIF=%d\n", rif->rif_index); 7243 7244 return 0; 7245 7246 err_rif_fdb_op: 7247 mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, rif->addr, rif->mtu); 7248 err_rif_edit: 7249 mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, true); 7250 return err; 7251 } 7252 7253 static int mlxsw_sp_router_port_pre_changeaddr_event(struct mlxsw_sp_rif *rif, 7254 struct netdev_notifier_pre_changeaddr_info *info) 7255 { 7256 struct netlink_ext_ack *extack; 7257 7258 extack = netdev_notifier_info_to_extack(&info->info); 7259 return mlxsw_sp_router_port_check_rif_addr(rif->mlxsw_sp, rif->dev, 7260 info->dev_addr, extack); 7261 } 7262 7263 int mlxsw_sp_netdevice_router_port_event(struct net_device *dev, 7264 unsigned long event, void *ptr) 7265 { 7266 struct mlxsw_sp *mlxsw_sp; 7267 struct mlxsw_sp_rif *rif; 7268 int err = 0; 7269 7270 mlxsw_sp = mlxsw_sp_lower_get(dev); 7271 if (!mlxsw_sp) 7272 return 0; 7273 7274 mutex_lock(&mlxsw_sp->router->lock); 7275 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 7276 if (!rif) 7277 goto out; 7278 7279 switch (event) { 7280 case NETDEV_CHANGEMTU: 7281 case NETDEV_CHANGEADDR: 7282 err = mlxsw_sp_router_port_change_event(mlxsw_sp, rif); 7283 break; 7284 case NETDEV_PRE_CHANGEADDR: 7285 err = mlxsw_sp_router_port_pre_changeaddr_event(rif, ptr); 7286 break; 7287 } 7288 7289 out: 7290 mutex_unlock(&mlxsw_sp->router->lock); 7291 return err; 7292 } 7293 7294 static int mlxsw_sp_port_vrf_join(struct mlxsw_sp *mlxsw_sp, 7295 struct net_device *l3_dev, 7296 struct netlink_ext_ack *extack) 7297 { 7298 struct mlxsw_sp_rif *rif; 7299 7300 /* If netdev is already associated with a RIF, then we need to 7301 * destroy it and create a new one with the new virtual router ID. 7302 */ 7303 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 7304 if (rif) 7305 __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_DOWN, 7306 extack); 7307 7308 return __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_UP, extack); 7309 } 7310 7311 static void mlxsw_sp_port_vrf_leave(struct mlxsw_sp *mlxsw_sp, 7312 struct net_device *l3_dev) 7313 { 7314 struct mlxsw_sp_rif *rif; 7315 7316 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 7317 if (!rif) 7318 return; 7319 __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_DOWN, NULL); 7320 } 7321 7322 int mlxsw_sp_netdevice_vrf_event(struct net_device *l3_dev, unsigned long event, 7323 struct netdev_notifier_changeupper_info *info) 7324 { 7325 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_lower_get(l3_dev); 7326 int err = 0; 7327 7328 /* We do not create a RIF for a macvlan, but only use it to 7329 * direct more MAC addresses to the router. 7330 */ 7331 if (!mlxsw_sp || netif_is_macvlan(l3_dev)) 7332 return 0; 7333 7334 mutex_lock(&mlxsw_sp->router->lock); 7335 switch (event) { 7336 case NETDEV_PRECHANGEUPPER: 7337 break; 7338 case NETDEV_CHANGEUPPER: 7339 if (info->linking) { 7340 struct netlink_ext_ack *extack; 7341 7342 extack = netdev_notifier_info_to_extack(&info->info); 7343 err = mlxsw_sp_port_vrf_join(mlxsw_sp, l3_dev, extack); 7344 } else { 7345 mlxsw_sp_port_vrf_leave(mlxsw_sp, l3_dev); 7346 } 7347 break; 7348 } 7349 mutex_unlock(&mlxsw_sp->router->lock); 7350 7351 return err; 7352 } 7353 7354 static int __mlxsw_sp_rif_macvlan_flush(struct net_device *dev, 7355 struct netdev_nested_priv *priv) 7356 { 7357 struct mlxsw_sp_rif *rif = (struct mlxsw_sp_rif *)priv->data; 7358 7359 if (!netif_is_macvlan(dev)) 7360 return 0; 7361 7362 return mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, dev->dev_addr, 7363 mlxsw_sp_fid_index(rif->fid), false); 7364 } 7365 7366 static int mlxsw_sp_rif_macvlan_flush(struct mlxsw_sp_rif *rif) 7367 { 7368 struct netdev_nested_priv priv = { 7369 .data = (void *)rif, 7370 }; 7371 7372 if (!netif_is_macvlan_port(rif->dev)) 7373 return 0; 7374 7375 netdev_warn(rif->dev, "Router interface is deleted. Upper macvlans will not work\n"); 7376 return netdev_walk_all_upper_dev_rcu(rif->dev, 7377 __mlxsw_sp_rif_macvlan_flush, &priv); 7378 } 7379 7380 static void mlxsw_sp_rif_subport_setup(struct mlxsw_sp_rif *rif, 7381 const struct mlxsw_sp_rif_params *params) 7382 { 7383 struct mlxsw_sp_rif_subport *rif_subport; 7384 7385 rif_subport = mlxsw_sp_rif_subport_rif(rif); 7386 refcount_set(&rif_subport->ref_count, 1); 7387 rif_subport->vid = params->vid; 7388 rif_subport->lag = params->lag; 7389 if (params->lag) 7390 rif_subport->lag_id = params->lag_id; 7391 else 7392 rif_subport->system_port = params->system_port; 7393 } 7394 7395 static int mlxsw_sp_rif_subport_op(struct mlxsw_sp_rif *rif, bool enable) 7396 { 7397 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7398 struct mlxsw_sp_rif_subport *rif_subport; 7399 char ritr_pl[MLXSW_REG_RITR_LEN]; 7400 7401 rif_subport = mlxsw_sp_rif_subport_rif(rif); 7402 mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_SP_IF, 7403 rif->rif_index, rif->vr_id, rif->dev->mtu); 7404 mlxsw_reg_ritr_mac_pack(ritr_pl, rif->dev->dev_addr); 7405 mlxsw_reg_ritr_sp_if_pack(ritr_pl, rif_subport->lag, 7406 rif_subport->lag ? rif_subport->lag_id : 7407 rif_subport->system_port, 7408 rif_subport->vid); 7409 7410 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7411 } 7412 7413 static int mlxsw_sp_rif_subport_configure(struct mlxsw_sp_rif *rif) 7414 { 7415 int err; 7416 7417 err = mlxsw_sp_rif_subport_op(rif, true); 7418 if (err) 7419 return err; 7420 7421 err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 7422 mlxsw_sp_fid_index(rif->fid), true); 7423 if (err) 7424 goto err_rif_fdb_op; 7425 7426 mlxsw_sp_fid_rif_set(rif->fid, rif); 7427 return 0; 7428 7429 err_rif_fdb_op: 7430 mlxsw_sp_rif_subport_op(rif, false); 7431 return err; 7432 } 7433 7434 static void mlxsw_sp_rif_subport_deconfigure(struct mlxsw_sp_rif *rif) 7435 { 7436 struct mlxsw_sp_fid *fid = rif->fid; 7437 7438 mlxsw_sp_fid_rif_set(fid, NULL); 7439 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 7440 mlxsw_sp_fid_index(fid), false); 7441 mlxsw_sp_rif_macvlan_flush(rif); 7442 mlxsw_sp_rif_subport_op(rif, false); 7443 } 7444 7445 static struct mlxsw_sp_fid * 7446 mlxsw_sp_rif_subport_fid_get(struct mlxsw_sp_rif *rif, 7447 struct netlink_ext_ack *extack) 7448 { 7449 return mlxsw_sp_fid_rfid_get(rif->mlxsw_sp, rif->rif_index); 7450 } 7451 7452 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_subport_ops = { 7453 .type = MLXSW_SP_RIF_TYPE_SUBPORT, 7454 .rif_size = sizeof(struct mlxsw_sp_rif_subport), 7455 .setup = mlxsw_sp_rif_subport_setup, 7456 .configure = mlxsw_sp_rif_subport_configure, 7457 .deconfigure = mlxsw_sp_rif_subport_deconfigure, 7458 .fid_get = mlxsw_sp_rif_subport_fid_get, 7459 }; 7460 7461 static int mlxsw_sp_rif_vlan_fid_op(struct mlxsw_sp_rif *rif, 7462 enum mlxsw_reg_ritr_if_type type, 7463 u16 vid_fid, bool enable) 7464 { 7465 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7466 char ritr_pl[MLXSW_REG_RITR_LEN]; 7467 7468 mlxsw_reg_ritr_pack(ritr_pl, enable, type, rif->rif_index, rif->vr_id, 7469 rif->dev->mtu); 7470 mlxsw_reg_ritr_mac_pack(ritr_pl, rif->dev->dev_addr); 7471 mlxsw_reg_ritr_fid_set(ritr_pl, type, vid_fid); 7472 7473 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7474 } 7475 7476 u8 mlxsw_sp_router_port(const struct mlxsw_sp *mlxsw_sp) 7477 { 7478 return mlxsw_core_max_ports(mlxsw_sp->core) + 1; 7479 } 7480 7481 static int mlxsw_sp_rif_fid_configure(struct mlxsw_sp_rif *rif) 7482 { 7483 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7484 u16 fid_index = mlxsw_sp_fid_index(rif->fid); 7485 int err; 7486 7487 err = mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, 7488 true); 7489 if (err) 7490 return err; 7491 7492 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 7493 mlxsw_sp_router_port(mlxsw_sp), true); 7494 if (err) 7495 goto err_fid_mc_flood_set; 7496 7497 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 7498 mlxsw_sp_router_port(mlxsw_sp), true); 7499 if (err) 7500 goto err_fid_bc_flood_set; 7501 7502 err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 7503 mlxsw_sp_fid_index(rif->fid), true); 7504 if (err) 7505 goto err_rif_fdb_op; 7506 7507 mlxsw_sp_fid_rif_set(rif->fid, rif); 7508 return 0; 7509 7510 err_rif_fdb_op: 7511 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 7512 mlxsw_sp_router_port(mlxsw_sp), false); 7513 err_fid_bc_flood_set: 7514 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 7515 mlxsw_sp_router_port(mlxsw_sp), false); 7516 err_fid_mc_flood_set: 7517 mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, false); 7518 return err; 7519 } 7520 7521 static void mlxsw_sp_rif_fid_deconfigure(struct mlxsw_sp_rif *rif) 7522 { 7523 u16 fid_index = mlxsw_sp_fid_index(rif->fid); 7524 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7525 struct mlxsw_sp_fid *fid = rif->fid; 7526 7527 mlxsw_sp_fid_rif_set(fid, NULL); 7528 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 7529 mlxsw_sp_fid_index(fid), false); 7530 mlxsw_sp_rif_macvlan_flush(rif); 7531 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 7532 mlxsw_sp_router_port(mlxsw_sp), false); 7533 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 7534 mlxsw_sp_router_port(mlxsw_sp), false); 7535 mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, false); 7536 } 7537 7538 static struct mlxsw_sp_fid * 7539 mlxsw_sp_rif_fid_fid_get(struct mlxsw_sp_rif *rif, 7540 struct netlink_ext_ack *extack) 7541 { 7542 return mlxsw_sp_fid_8021d_get(rif->mlxsw_sp, rif->dev->ifindex); 7543 } 7544 7545 static void mlxsw_sp_rif_fid_fdb_del(struct mlxsw_sp_rif *rif, const char *mac) 7546 { 7547 struct switchdev_notifier_fdb_info info; 7548 struct net_device *dev; 7549 7550 dev = br_fdb_find_port(rif->dev, mac, 0); 7551 if (!dev) 7552 return; 7553 7554 info.addr = mac; 7555 info.vid = 0; 7556 call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE, dev, &info.info, 7557 NULL); 7558 } 7559 7560 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_fid_ops = { 7561 .type = MLXSW_SP_RIF_TYPE_FID, 7562 .rif_size = sizeof(struct mlxsw_sp_rif), 7563 .configure = mlxsw_sp_rif_fid_configure, 7564 .deconfigure = mlxsw_sp_rif_fid_deconfigure, 7565 .fid_get = mlxsw_sp_rif_fid_fid_get, 7566 .fdb_del = mlxsw_sp_rif_fid_fdb_del, 7567 }; 7568 7569 static struct mlxsw_sp_fid * 7570 mlxsw_sp_rif_vlan_fid_get(struct mlxsw_sp_rif *rif, 7571 struct netlink_ext_ack *extack) 7572 { 7573 struct net_device *br_dev; 7574 u16 vid; 7575 int err; 7576 7577 if (is_vlan_dev(rif->dev)) { 7578 vid = vlan_dev_vlan_id(rif->dev); 7579 br_dev = vlan_dev_real_dev(rif->dev); 7580 if (WARN_ON(!netif_is_bridge_master(br_dev))) 7581 return ERR_PTR(-EINVAL); 7582 } else { 7583 err = br_vlan_get_pvid(rif->dev, &vid); 7584 if (err < 0 || !vid) { 7585 NL_SET_ERR_MSG_MOD(extack, "Couldn't determine bridge PVID"); 7586 return ERR_PTR(-EINVAL); 7587 } 7588 } 7589 7590 return mlxsw_sp_fid_8021q_get(rif->mlxsw_sp, vid); 7591 } 7592 7593 static void mlxsw_sp_rif_vlan_fdb_del(struct mlxsw_sp_rif *rif, const char *mac) 7594 { 7595 u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid); 7596 struct switchdev_notifier_fdb_info info; 7597 struct net_device *br_dev; 7598 struct net_device *dev; 7599 7600 br_dev = is_vlan_dev(rif->dev) ? vlan_dev_real_dev(rif->dev) : rif->dev; 7601 dev = br_fdb_find_port(br_dev, mac, vid); 7602 if (!dev) 7603 return; 7604 7605 info.addr = mac; 7606 info.vid = vid; 7607 call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE, dev, &info.info, 7608 NULL); 7609 } 7610 7611 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_vlan_emu_ops = { 7612 .type = MLXSW_SP_RIF_TYPE_VLAN, 7613 .rif_size = sizeof(struct mlxsw_sp_rif), 7614 .configure = mlxsw_sp_rif_fid_configure, 7615 .deconfigure = mlxsw_sp_rif_fid_deconfigure, 7616 .fid_get = mlxsw_sp_rif_vlan_fid_get, 7617 .fdb_del = mlxsw_sp_rif_vlan_fdb_del, 7618 }; 7619 7620 static struct mlxsw_sp_rif_ipip_lb * 7621 mlxsw_sp_rif_ipip_lb_rif(struct mlxsw_sp_rif *rif) 7622 { 7623 return container_of(rif, struct mlxsw_sp_rif_ipip_lb, common); 7624 } 7625 7626 static void 7627 mlxsw_sp_rif_ipip_lb_setup(struct mlxsw_sp_rif *rif, 7628 const struct mlxsw_sp_rif_params *params) 7629 { 7630 struct mlxsw_sp_rif_params_ipip_lb *params_lb; 7631 struct mlxsw_sp_rif_ipip_lb *rif_lb; 7632 7633 params_lb = container_of(params, struct mlxsw_sp_rif_params_ipip_lb, 7634 common); 7635 rif_lb = mlxsw_sp_rif_ipip_lb_rif(rif); 7636 rif_lb->lb_config = params_lb->lb_config; 7637 } 7638 7639 static int 7640 mlxsw_sp1_rif_ipip_lb_configure(struct mlxsw_sp_rif *rif) 7641 { 7642 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 7643 u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(rif->dev); 7644 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7645 struct mlxsw_sp_vr *ul_vr; 7646 int err; 7647 7648 ul_vr = mlxsw_sp_vr_get(mlxsw_sp, ul_tb_id, NULL); 7649 if (IS_ERR(ul_vr)) 7650 return PTR_ERR(ul_vr); 7651 7652 err = mlxsw_sp_rif_ipip_lb_op(lb_rif, ul_vr->id, 0, true); 7653 if (err) 7654 goto err_loopback_op; 7655 7656 lb_rif->ul_vr_id = ul_vr->id; 7657 lb_rif->ul_rif_id = 0; 7658 ++ul_vr->rif_count; 7659 return 0; 7660 7661 err_loopback_op: 7662 mlxsw_sp_vr_put(mlxsw_sp, ul_vr); 7663 return err; 7664 } 7665 7666 static void mlxsw_sp1_rif_ipip_lb_deconfigure(struct mlxsw_sp_rif *rif) 7667 { 7668 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 7669 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7670 struct mlxsw_sp_vr *ul_vr; 7671 7672 ul_vr = &mlxsw_sp->router->vrs[lb_rif->ul_vr_id]; 7673 mlxsw_sp_rif_ipip_lb_op(lb_rif, ul_vr->id, 0, false); 7674 7675 --ul_vr->rif_count; 7676 mlxsw_sp_vr_put(mlxsw_sp, ul_vr); 7677 } 7678 7679 static const struct mlxsw_sp_rif_ops mlxsw_sp1_rif_ipip_lb_ops = { 7680 .type = MLXSW_SP_RIF_TYPE_IPIP_LB, 7681 .rif_size = sizeof(struct mlxsw_sp_rif_ipip_lb), 7682 .setup = mlxsw_sp_rif_ipip_lb_setup, 7683 .configure = mlxsw_sp1_rif_ipip_lb_configure, 7684 .deconfigure = mlxsw_sp1_rif_ipip_lb_deconfigure, 7685 }; 7686 7687 const struct mlxsw_sp_rif_ops *mlxsw_sp1_rif_ops_arr[] = { 7688 [MLXSW_SP_RIF_TYPE_SUBPORT] = &mlxsw_sp_rif_subport_ops, 7689 [MLXSW_SP_RIF_TYPE_VLAN] = &mlxsw_sp_rif_vlan_emu_ops, 7690 [MLXSW_SP_RIF_TYPE_FID] = &mlxsw_sp_rif_fid_ops, 7691 [MLXSW_SP_RIF_TYPE_IPIP_LB] = &mlxsw_sp1_rif_ipip_lb_ops, 7692 }; 7693 7694 static int 7695 mlxsw_sp_rif_ipip_lb_ul_rif_op(struct mlxsw_sp_rif *ul_rif, bool enable) 7696 { 7697 struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp; 7698 char ritr_pl[MLXSW_REG_RITR_LEN]; 7699 7700 mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF, 7701 ul_rif->rif_index, ul_rif->vr_id, IP_MAX_MTU); 7702 mlxsw_reg_ritr_loopback_protocol_set(ritr_pl, 7703 MLXSW_REG_RITR_LOOPBACK_GENERIC); 7704 7705 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7706 } 7707 7708 static struct mlxsw_sp_rif * 7709 mlxsw_sp_ul_rif_create(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr, 7710 struct netlink_ext_ack *extack) 7711 { 7712 struct mlxsw_sp_rif *ul_rif; 7713 u16 rif_index; 7714 int err; 7715 7716 err = mlxsw_sp_rif_index_alloc(mlxsw_sp, &rif_index); 7717 if (err) { 7718 NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported router interfaces"); 7719 return ERR_PTR(err); 7720 } 7721 7722 ul_rif = mlxsw_sp_rif_alloc(sizeof(*ul_rif), rif_index, vr->id, NULL); 7723 if (!ul_rif) 7724 return ERR_PTR(-ENOMEM); 7725 7726 mlxsw_sp->router->rifs[rif_index] = ul_rif; 7727 ul_rif->mlxsw_sp = mlxsw_sp; 7728 err = mlxsw_sp_rif_ipip_lb_ul_rif_op(ul_rif, true); 7729 if (err) 7730 goto ul_rif_op_err; 7731 7732 return ul_rif; 7733 7734 ul_rif_op_err: 7735 mlxsw_sp->router->rifs[rif_index] = NULL; 7736 kfree(ul_rif); 7737 return ERR_PTR(err); 7738 } 7739 7740 static void mlxsw_sp_ul_rif_destroy(struct mlxsw_sp_rif *ul_rif) 7741 { 7742 struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp; 7743 7744 mlxsw_sp_rif_ipip_lb_ul_rif_op(ul_rif, false); 7745 mlxsw_sp->router->rifs[ul_rif->rif_index] = NULL; 7746 kfree(ul_rif); 7747 } 7748 7749 static struct mlxsw_sp_rif * 7750 mlxsw_sp_ul_rif_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, 7751 struct netlink_ext_ack *extack) 7752 { 7753 struct mlxsw_sp_vr *vr; 7754 int err; 7755 7756 vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id, extack); 7757 if (IS_ERR(vr)) 7758 return ERR_CAST(vr); 7759 7760 if (refcount_inc_not_zero(&vr->ul_rif_refcnt)) 7761 return vr->ul_rif; 7762 7763 vr->ul_rif = mlxsw_sp_ul_rif_create(mlxsw_sp, vr, extack); 7764 if (IS_ERR(vr->ul_rif)) { 7765 err = PTR_ERR(vr->ul_rif); 7766 goto err_ul_rif_create; 7767 } 7768 7769 vr->rif_count++; 7770 refcount_set(&vr->ul_rif_refcnt, 1); 7771 7772 return vr->ul_rif; 7773 7774 err_ul_rif_create: 7775 mlxsw_sp_vr_put(mlxsw_sp, vr); 7776 return ERR_PTR(err); 7777 } 7778 7779 static void mlxsw_sp_ul_rif_put(struct mlxsw_sp_rif *ul_rif) 7780 { 7781 struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp; 7782 struct mlxsw_sp_vr *vr; 7783 7784 vr = &mlxsw_sp->router->vrs[ul_rif->vr_id]; 7785 7786 if (!refcount_dec_and_test(&vr->ul_rif_refcnt)) 7787 return; 7788 7789 vr->rif_count--; 7790 mlxsw_sp_ul_rif_destroy(ul_rif); 7791 mlxsw_sp_vr_put(mlxsw_sp, vr); 7792 } 7793 7794 int mlxsw_sp_router_ul_rif_get(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id, 7795 u16 *ul_rif_index) 7796 { 7797 struct mlxsw_sp_rif *ul_rif; 7798 int err = 0; 7799 7800 mutex_lock(&mlxsw_sp->router->lock); 7801 ul_rif = mlxsw_sp_ul_rif_get(mlxsw_sp, ul_tb_id, NULL); 7802 if (IS_ERR(ul_rif)) { 7803 err = PTR_ERR(ul_rif); 7804 goto out; 7805 } 7806 *ul_rif_index = ul_rif->rif_index; 7807 out: 7808 mutex_unlock(&mlxsw_sp->router->lock); 7809 return err; 7810 } 7811 7812 void mlxsw_sp_router_ul_rif_put(struct mlxsw_sp *mlxsw_sp, u16 ul_rif_index) 7813 { 7814 struct mlxsw_sp_rif *ul_rif; 7815 7816 mutex_lock(&mlxsw_sp->router->lock); 7817 ul_rif = mlxsw_sp->router->rifs[ul_rif_index]; 7818 if (WARN_ON(!ul_rif)) 7819 goto out; 7820 7821 mlxsw_sp_ul_rif_put(ul_rif); 7822 out: 7823 mutex_unlock(&mlxsw_sp->router->lock); 7824 } 7825 7826 static int 7827 mlxsw_sp2_rif_ipip_lb_configure(struct mlxsw_sp_rif *rif) 7828 { 7829 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 7830 u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(rif->dev); 7831 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7832 struct mlxsw_sp_rif *ul_rif; 7833 int err; 7834 7835 ul_rif = mlxsw_sp_ul_rif_get(mlxsw_sp, ul_tb_id, NULL); 7836 if (IS_ERR(ul_rif)) 7837 return PTR_ERR(ul_rif); 7838 7839 err = mlxsw_sp_rif_ipip_lb_op(lb_rif, 0, ul_rif->rif_index, true); 7840 if (err) 7841 goto err_loopback_op; 7842 7843 lb_rif->ul_vr_id = 0; 7844 lb_rif->ul_rif_id = ul_rif->rif_index; 7845 7846 return 0; 7847 7848 err_loopback_op: 7849 mlxsw_sp_ul_rif_put(ul_rif); 7850 return err; 7851 } 7852 7853 static void mlxsw_sp2_rif_ipip_lb_deconfigure(struct mlxsw_sp_rif *rif) 7854 { 7855 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 7856 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7857 struct mlxsw_sp_rif *ul_rif; 7858 7859 ul_rif = mlxsw_sp_rif_by_index(mlxsw_sp, lb_rif->ul_rif_id); 7860 mlxsw_sp_rif_ipip_lb_op(lb_rif, 0, lb_rif->ul_rif_id, false); 7861 mlxsw_sp_ul_rif_put(ul_rif); 7862 } 7863 7864 static const struct mlxsw_sp_rif_ops mlxsw_sp2_rif_ipip_lb_ops = { 7865 .type = MLXSW_SP_RIF_TYPE_IPIP_LB, 7866 .rif_size = sizeof(struct mlxsw_sp_rif_ipip_lb), 7867 .setup = mlxsw_sp_rif_ipip_lb_setup, 7868 .configure = mlxsw_sp2_rif_ipip_lb_configure, 7869 .deconfigure = mlxsw_sp2_rif_ipip_lb_deconfigure, 7870 }; 7871 7872 const struct mlxsw_sp_rif_ops *mlxsw_sp2_rif_ops_arr[] = { 7873 [MLXSW_SP_RIF_TYPE_SUBPORT] = &mlxsw_sp_rif_subport_ops, 7874 [MLXSW_SP_RIF_TYPE_VLAN] = &mlxsw_sp_rif_vlan_emu_ops, 7875 [MLXSW_SP_RIF_TYPE_FID] = &mlxsw_sp_rif_fid_ops, 7876 [MLXSW_SP_RIF_TYPE_IPIP_LB] = &mlxsw_sp2_rif_ipip_lb_ops, 7877 }; 7878 7879 static int mlxsw_sp_rifs_init(struct mlxsw_sp *mlxsw_sp) 7880 { 7881 u64 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); 7882 7883 mlxsw_sp->router->rifs = kcalloc(max_rifs, 7884 sizeof(struct mlxsw_sp_rif *), 7885 GFP_KERNEL); 7886 if (!mlxsw_sp->router->rifs) 7887 return -ENOMEM; 7888 7889 return 0; 7890 } 7891 7892 static void mlxsw_sp_rifs_fini(struct mlxsw_sp *mlxsw_sp) 7893 { 7894 int i; 7895 7896 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) 7897 WARN_ON_ONCE(mlxsw_sp->router->rifs[i]); 7898 7899 kfree(mlxsw_sp->router->rifs); 7900 } 7901 7902 static int 7903 mlxsw_sp_ipip_config_tigcr(struct mlxsw_sp *mlxsw_sp) 7904 { 7905 char tigcr_pl[MLXSW_REG_TIGCR_LEN]; 7906 7907 mlxsw_reg_tigcr_pack(tigcr_pl, true, 0); 7908 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tigcr), tigcr_pl); 7909 } 7910 7911 static int mlxsw_sp_ipips_init(struct mlxsw_sp *mlxsw_sp) 7912 { 7913 int err; 7914 7915 mlxsw_sp->router->ipip_ops_arr = mlxsw_sp_ipip_ops_arr; 7916 INIT_LIST_HEAD(&mlxsw_sp->router->ipip_list); 7917 7918 err = mlxsw_sp_ipip_ecn_encap_init(mlxsw_sp); 7919 if (err) 7920 return err; 7921 err = mlxsw_sp_ipip_ecn_decap_init(mlxsw_sp); 7922 if (err) 7923 return err; 7924 7925 return mlxsw_sp_ipip_config_tigcr(mlxsw_sp); 7926 } 7927 7928 static void mlxsw_sp_ipips_fini(struct mlxsw_sp *mlxsw_sp) 7929 { 7930 WARN_ON(!list_empty(&mlxsw_sp->router->ipip_list)); 7931 } 7932 7933 static void mlxsw_sp_router_fib_dump_flush(struct notifier_block *nb) 7934 { 7935 struct mlxsw_sp_router *router; 7936 7937 /* Flush pending FIB notifications and then flush the device's 7938 * table before requesting another dump. The FIB notification 7939 * block is unregistered, so no need to take RTNL. 7940 */ 7941 mlxsw_core_flush_owq(); 7942 router = container_of(nb, struct mlxsw_sp_router, fib_nb); 7943 mlxsw_sp_router_fib_flush(router->mlxsw_sp); 7944 } 7945 7946 #ifdef CONFIG_IP_ROUTE_MULTIPATH 7947 static void mlxsw_sp_mp_hash_header_set(char *recr2_pl, int header) 7948 { 7949 mlxsw_reg_recr2_outer_header_enables_set(recr2_pl, header, true); 7950 } 7951 7952 static void mlxsw_sp_mp_hash_field_set(char *recr2_pl, int field) 7953 { 7954 mlxsw_reg_recr2_outer_header_fields_enable_set(recr2_pl, field, true); 7955 } 7956 7957 static void mlxsw_sp_mp4_hash_init(struct mlxsw_sp *mlxsw_sp, char *recr2_pl) 7958 { 7959 struct net *net = mlxsw_sp_net(mlxsw_sp); 7960 bool only_l3 = !net->ipv4.sysctl_fib_multipath_hash_policy; 7961 7962 mlxsw_sp_mp_hash_header_set(recr2_pl, 7963 MLXSW_REG_RECR2_IPV4_EN_NOT_TCP_NOT_UDP); 7964 mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_IPV4_EN_TCP_UDP); 7965 mlxsw_reg_recr2_ipv4_sip_enable(recr2_pl); 7966 mlxsw_reg_recr2_ipv4_dip_enable(recr2_pl); 7967 if (only_l3) 7968 return; 7969 mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_EN_IPV4); 7970 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_IPV4_PROTOCOL); 7971 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_SPORT); 7972 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_DPORT); 7973 } 7974 7975 static void mlxsw_sp_mp6_hash_init(struct mlxsw_sp *mlxsw_sp, char *recr2_pl) 7976 { 7977 bool only_l3 = !ip6_multipath_hash_policy(mlxsw_sp_net(mlxsw_sp)); 7978 7979 mlxsw_sp_mp_hash_header_set(recr2_pl, 7980 MLXSW_REG_RECR2_IPV6_EN_NOT_TCP_NOT_UDP); 7981 mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_IPV6_EN_TCP_UDP); 7982 mlxsw_reg_recr2_ipv6_sip_enable(recr2_pl); 7983 mlxsw_reg_recr2_ipv6_dip_enable(recr2_pl); 7984 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_IPV6_NEXT_HEADER); 7985 if (only_l3) { 7986 mlxsw_sp_mp_hash_field_set(recr2_pl, 7987 MLXSW_REG_RECR2_IPV6_FLOW_LABEL); 7988 } else { 7989 mlxsw_sp_mp_hash_header_set(recr2_pl, 7990 MLXSW_REG_RECR2_TCP_UDP_EN_IPV6); 7991 mlxsw_sp_mp_hash_field_set(recr2_pl, 7992 MLXSW_REG_RECR2_TCP_UDP_SPORT); 7993 mlxsw_sp_mp_hash_field_set(recr2_pl, 7994 MLXSW_REG_RECR2_TCP_UDP_DPORT); 7995 } 7996 } 7997 7998 static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp) 7999 { 8000 char recr2_pl[MLXSW_REG_RECR2_LEN]; 8001 u32 seed; 8002 8003 seed = jhash(mlxsw_sp->base_mac, sizeof(mlxsw_sp->base_mac), 0); 8004 mlxsw_reg_recr2_pack(recr2_pl, seed); 8005 mlxsw_sp_mp4_hash_init(mlxsw_sp, recr2_pl); 8006 mlxsw_sp_mp6_hash_init(mlxsw_sp, recr2_pl); 8007 8008 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(recr2), recr2_pl); 8009 } 8010 #else 8011 static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp) 8012 { 8013 return 0; 8014 } 8015 #endif 8016 8017 static int mlxsw_sp_dscp_init(struct mlxsw_sp *mlxsw_sp) 8018 { 8019 char rdpm_pl[MLXSW_REG_RDPM_LEN]; 8020 unsigned int i; 8021 8022 MLXSW_REG_ZERO(rdpm, rdpm_pl); 8023 8024 /* HW is determining switch priority based on DSCP-bits, but the 8025 * kernel is still doing that based on the ToS. Since there's a 8026 * mismatch in bits we need to make sure to translate the right 8027 * value ToS would observe, skipping the 2 least-significant ECN bits. 8028 */ 8029 for (i = 0; i < MLXSW_REG_RDPM_DSCP_ENTRY_REC_MAX_COUNT; i++) 8030 mlxsw_reg_rdpm_pack(rdpm_pl, i, rt_tos2priority(i << 2)); 8031 8032 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rdpm), rdpm_pl); 8033 } 8034 8035 static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp) 8036 { 8037 struct net *net = mlxsw_sp_net(mlxsw_sp); 8038 bool usp = net->ipv4.sysctl_ip_fwd_update_priority; 8039 char rgcr_pl[MLXSW_REG_RGCR_LEN]; 8040 u64 max_rifs; 8041 8042 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_RIFS)) 8043 return -EIO; 8044 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); 8045 8046 mlxsw_reg_rgcr_pack(rgcr_pl, true, true); 8047 mlxsw_reg_rgcr_max_router_interfaces_set(rgcr_pl, max_rifs); 8048 mlxsw_reg_rgcr_usp_set(rgcr_pl, usp); 8049 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl); 8050 } 8051 8052 static void __mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp) 8053 { 8054 char rgcr_pl[MLXSW_REG_RGCR_LEN]; 8055 8056 mlxsw_reg_rgcr_pack(rgcr_pl, false, false); 8057 mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl); 8058 } 8059 8060 int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp, 8061 struct netlink_ext_ack *extack) 8062 { 8063 struct mlxsw_sp_router *router; 8064 int err; 8065 8066 router = kzalloc(sizeof(*mlxsw_sp->router), GFP_KERNEL); 8067 if (!router) 8068 return -ENOMEM; 8069 mutex_init(&router->lock); 8070 mlxsw_sp->router = router; 8071 router->mlxsw_sp = mlxsw_sp; 8072 8073 INIT_LIST_HEAD(&mlxsw_sp->router->nexthop_neighs_list); 8074 err = __mlxsw_sp_router_init(mlxsw_sp); 8075 if (err) 8076 goto err_router_init; 8077 8078 err = mlxsw_sp_rifs_init(mlxsw_sp); 8079 if (err) 8080 goto err_rifs_init; 8081 8082 err = mlxsw_sp_ipips_init(mlxsw_sp); 8083 if (err) 8084 goto err_ipips_init; 8085 8086 err = rhashtable_init(&mlxsw_sp->router->nexthop_ht, 8087 &mlxsw_sp_nexthop_ht_params); 8088 if (err) 8089 goto err_nexthop_ht_init; 8090 8091 err = rhashtable_init(&mlxsw_sp->router->nexthop_group_ht, 8092 &mlxsw_sp_nexthop_group_ht_params); 8093 if (err) 8094 goto err_nexthop_group_ht_init; 8095 8096 INIT_LIST_HEAD(&mlxsw_sp->router->nexthop_list); 8097 err = mlxsw_sp_lpm_init(mlxsw_sp); 8098 if (err) 8099 goto err_lpm_init; 8100 8101 err = mlxsw_sp_mr_init(mlxsw_sp, &mlxsw_sp_mr_tcam_ops); 8102 if (err) 8103 goto err_mr_init; 8104 8105 err = mlxsw_sp_vrs_init(mlxsw_sp); 8106 if (err) 8107 goto err_vrs_init; 8108 8109 err = mlxsw_sp_neigh_init(mlxsw_sp); 8110 if (err) 8111 goto err_neigh_init; 8112 8113 err = mlxsw_sp_mp_hash_init(mlxsw_sp); 8114 if (err) 8115 goto err_mp_hash_init; 8116 8117 err = mlxsw_sp_dscp_init(mlxsw_sp); 8118 if (err) 8119 goto err_dscp_init; 8120 8121 router->inetaddr_nb.notifier_call = mlxsw_sp_inetaddr_event; 8122 err = register_inetaddr_notifier(&router->inetaddr_nb); 8123 if (err) 8124 goto err_register_inetaddr_notifier; 8125 8126 router->inet6addr_nb.notifier_call = mlxsw_sp_inet6addr_event; 8127 err = register_inet6addr_notifier(&router->inet6addr_nb); 8128 if (err) 8129 goto err_register_inet6addr_notifier; 8130 8131 mlxsw_sp->router->netevent_nb.notifier_call = 8132 mlxsw_sp_router_netevent_event; 8133 err = register_netevent_notifier(&mlxsw_sp->router->netevent_nb); 8134 if (err) 8135 goto err_register_netevent_notifier; 8136 8137 mlxsw_sp->router->fib_nb.notifier_call = mlxsw_sp_router_fib_event; 8138 err = register_fib_notifier(mlxsw_sp_net(mlxsw_sp), 8139 &mlxsw_sp->router->fib_nb, 8140 mlxsw_sp_router_fib_dump_flush, extack); 8141 if (err) 8142 goto err_register_fib_notifier; 8143 8144 return 0; 8145 8146 err_register_fib_notifier: 8147 unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb); 8148 err_register_netevent_notifier: 8149 unregister_inet6addr_notifier(&router->inet6addr_nb); 8150 err_register_inet6addr_notifier: 8151 unregister_inetaddr_notifier(&router->inetaddr_nb); 8152 err_register_inetaddr_notifier: 8153 mlxsw_core_flush_owq(); 8154 err_dscp_init: 8155 err_mp_hash_init: 8156 mlxsw_sp_neigh_fini(mlxsw_sp); 8157 err_neigh_init: 8158 mlxsw_sp_vrs_fini(mlxsw_sp); 8159 err_vrs_init: 8160 mlxsw_sp_mr_fini(mlxsw_sp); 8161 err_mr_init: 8162 mlxsw_sp_lpm_fini(mlxsw_sp); 8163 err_lpm_init: 8164 rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht); 8165 err_nexthop_group_ht_init: 8166 rhashtable_destroy(&mlxsw_sp->router->nexthop_ht); 8167 err_nexthop_ht_init: 8168 mlxsw_sp_ipips_fini(mlxsw_sp); 8169 err_ipips_init: 8170 mlxsw_sp_rifs_fini(mlxsw_sp); 8171 err_rifs_init: 8172 __mlxsw_sp_router_fini(mlxsw_sp); 8173 err_router_init: 8174 mutex_destroy(&mlxsw_sp->router->lock); 8175 kfree(mlxsw_sp->router); 8176 return err; 8177 } 8178 8179 void mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp) 8180 { 8181 unregister_fib_notifier(mlxsw_sp_net(mlxsw_sp), 8182 &mlxsw_sp->router->fib_nb); 8183 unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb); 8184 unregister_inet6addr_notifier(&mlxsw_sp->router->inet6addr_nb); 8185 unregister_inetaddr_notifier(&mlxsw_sp->router->inetaddr_nb); 8186 mlxsw_core_flush_owq(); 8187 mlxsw_sp_neigh_fini(mlxsw_sp); 8188 mlxsw_sp_vrs_fini(mlxsw_sp); 8189 mlxsw_sp_mr_fini(mlxsw_sp); 8190 mlxsw_sp_lpm_fini(mlxsw_sp); 8191 rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht); 8192 rhashtable_destroy(&mlxsw_sp->router->nexthop_ht); 8193 mlxsw_sp_ipips_fini(mlxsw_sp); 8194 mlxsw_sp_rifs_fini(mlxsw_sp); 8195 __mlxsw_sp_router_fini(mlxsw_sp); 8196 mutex_destroy(&mlxsw_sp->router->lock); 8197 kfree(mlxsw_sp->router); 8198 } 8199