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: /* fall through */ 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 /* fall through */ 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: /* fall through */ 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 /* Packets with link-local destination IP arriving to the router 5005 * are trapped to the CPU, so no need to program specific routes 5006 * for them. 5007 */ 5008 if (ipv6_addr_type(&rt->fib6_dst.addr) & IPV6_ADDR_LINKLOCAL) 5009 return true; 5010 5011 /* Multicast routes aren't supported, so ignore them. Neighbour 5012 * Discovery packets are specifically trapped. 5013 */ 5014 if (ipv6_addr_type(&rt->fib6_dst.addr) & IPV6_ADDR_MULTICAST) 5015 return true; 5016 5017 /* Cloned routes are irrelevant in the forwarding path. */ 5018 if (rt->fib6_flags & RTF_CACHE) 5019 return true; 5020 5021 return false; 5022 } 5023 5024 static struct mlxsw_sp_rt6 *mlxsw_sp_rt6_create(struct fib6_info *rt) 5025 { 5026 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5027 5028 mlxsw_sp_rt6 = kzalloc(sizeof(*mlxsw_sp_rt6), GFP_KERNEL); 5029 if (!mlxsw_sp_rt6) 5030 return ERR_PTR(-ENOMEM); 5031 5032 /* In case of route replace, replaced route is deleted with 5033 * no notification. Take reference to prevent accessing freed 5034 * memory. 5035 */ 5036 mlxsw_sp_rt6->rt = rt; 5037 fib6_info_hold(rt); 5038 5039 return mlxsw_sp_rt6; 5040 } 5041 5042 #if IS_ENABLED(CONFIG_IPV6) 5043 static void mlxsw_sp_rt6_release(struct fib6_info *rt) 5044 { 5045 fib6_info_release(rt); 5046 } 5047 #else 5048 static void mlxsw_sp_rt6_release(struct fib6_info *rt) 5049 { 5050 } 5051 #endif 5052 5053 static void mlxsw_sp_rt6_destroy(struct mlxsw_sp_rt6 *mlxsw_sp_rt6) 5054 { 5055 struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh; 5056 5057 fib6_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD; 5058 mlxsw_sp_rt6_release(mlxsw_sp_rt6->rt); 5059 kfree(mlxsw_sp_rt6); 5060 } 5061 5062 static struct fib6_info * 5063 mlxsw_sp_fib6_entry_rt(const struct mlxsw_sp_fib6_entry *fib6_entry) 5064 { 5065 return list_first_entry(&fib6_entry->rt6_list, struct mlxsw_sp_rt6, 5066 list)->rt; 5067 } 5068 5069 static struct mlxsw_sp_rt6 * 5070 mlxsw_sp_fib6_entry_rt_find(const struct mlxsw_sp_fib6_entry *fib6_entry, 5071 const struct fib6_info *rt) 5072 { 5073 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5074 5075 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 5076 if (mlxsw_sp_rt6->rt == rt) 5077 return mlxsw_sp_rt6; 5078 } 5079 5080 return NULL; 5081 } 5082 5083 static bool mlxsw_sp_nexthop6_ipip_type(const struct mlxsw_sp *mlxsw_sp, 5084 const struct fib6_info *rt, 5085 enum mlxsw_sp_ipip_type *ret) 5086 { 5087 return rt->fib6_nh->fib_nh_dev && 5088 mlxsw_sp_netdev_ipip_type(mlxsw_sp, rt->fib6_nh->fib_nh_dev, ret); 5089 } 5090 5091 static int mlxsw_sp_nexthop6_type_init(struct mlxsw_sp *mlxsw_sp, 5092 struct mlxsw_sp_nexthop_group *nh_grp, 5093 struct mlxsw_sp_nexthop *nh, 5094 const struct fib6_info *rt) 5095 { 5096 const struct mlxsw_sp_ipip_ops *ipip_ops; 5097 struct mlxsw_sp_ipip_entry *ipip_entry; 5098 struct net_device *dev = rt->fib6_nh->fib_nh_dev; 5099 struct mlxsw_sp_rif *rif; 5100 int err; 5101 5102 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev); 5103 if (ipip_entry) { 5104 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 5105 if (ipip_ops->can_offload(mlxsw_sp, dev, 5106 MLXSW_SP_L3_PROTO_IPV6)) { 5107 nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP; 5108 mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry); 5109 return 0; 5110 } 5111 } 5112 5113 nh->type = MLXSW_SP_NEXTHOP_TYPE_ETH; 5114 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 5115 if (!rif) 5116 return 0; 5117 mlxsw_sp_nexthop_rif_init(nh, rif); 5118 5119 err = mlxsw_sp_nexthop_neigh_init(mlxsw_sp, nh); 5120 if (err) 5121 goto err_nexthop_neigh_init; 5122 5123 return 0; 5124 5125 err_nexthop_neigh_init: 5126 mlxsw_sp_nexthop_rif_fini(nh); 5127 return err; 5128 } 5129 5130 static void mlxsw_sp_nexthop6_type_fini(struct mlxsw_sp *mlxsw_sp, 5131 struct mlxsw_sp_nexthop *nh) 5132 { 5133 mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); 5134 } 5135 5136 static int mlxsw_sp_nexthop6_init(struct mlxsw_sp *mlxsw_sp, 5137 struct mlxsw_sp_nexthop_group *nh_grp, 5138 struct mlxsw_sp_nexthop *nh, 5139 const struct fib6_info *rt) 5140 { 5141 struct net_device *dev = rt->fib6_nh->fib_nh_dev; 5142 5143 nh->nh_grp = nh_grp; 5144 nh->nh_weight = rt->fib6_nh->fib_nh_weight; 5145 memcpy(&nh->gw_addr, &rt->fib6_nh->fib_nh_gw6, sizeof(nh->gw_addr)); 5146 mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh); 5147 5148 list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list); 5149 5150 if (!dev) 5151 return 0; 5152 nh->ifindex = dev->ifindex; 5153 5154 return mlxsw_sp_nexthop6_type_init(mlxsw_sp, nh_grp, nh, rt); 5155 } 5156 5157 static void mlxsw_sp_nexthop6_fini(struct mlxsw_sp *mlxsw_sp, 5158 struct mlxsw_sp_nexthop *nh) 5159 { 5160 mlxsw_sp_nexthop6_type_fini(mlxsw_sp, nh); 5161 list_del(&nh->router_list_node); 5162 mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh); 5163 } 5164 5165 static bool mlxsw_sp_rt6_is_gateway(const struct mlxsw_sp *mlxsw_sp, 5166 const struct fib6_info *rt) 5167 { 5168 return rt->fib6_nh->fib_nh_gw_family || 5169 mlxsw_sp_nexthop6_ipip_type(mlxsw_sp, rt, NULL); 5170 } 5171 5172 static struct mlxsw_sp_nexthop_group * 5173 mlxsw_sp_nexthop6_group_create(struct mlxsw_sp *mlxsw_sp, 5174 struct mlxsw_sp_fib6_entry *fib6_entry) 5175 { 5176 struct mlxsw_sp_nexthop_group *nh_grp; 5177 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5178 struct mlxsw_sp_nexthop *nh; 5179 int i = 0; 5180 int err; 5181 5182 nh_grp = kzalloc(struct_size(nh_grp, nexthops, fib6_entry->nrt6), 5183 GFP_KERNEL); 5184 if (!nh_grp) 5185 return ERR_PTR(-ENOMEM); 5186 INIT_LIST_HEAD(&nh_grp->fib_list); 5187 #if IS_ENABLED(CONFIG_IPV6) 5188 nh_grp->neigh_tbl = &nd_tbl; 5189 #endif 5190 mlxsw_sp_rt6 = list_first_entry(&fib6_entry->rt6_list, 5191 struct mlxsw_sp_rt6, list); 5192 nh_grp->gateway = mlxsw_sp_rt6_is_gateway(mlxsw_sp, mlxsw_sp_rt6->rt); 5193 nh_grp->count = fib6_entry->nrt6; 5194 for (i = 0; i < nh_grp->count; i++) { 5195 struct fib6_info *rt = mlxsw_sp_rt6->rt; 5196 5197 nh = &nh_grp->nexthops[i]; 5198 err = mlxsw_sp_nexthop6_init(mlxsw_sp, nh_grp, nh, rt); 5199 if (err) 5200 goto err_nexthop6_init; 5201 mlxsw_sp_rt6 = list_next_entry(mlxsw_sp_rt6, list); 5202 } 5203 5204 err = mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp); 5205 if (err) 5206 goto err_nexthop_group_insert; 5207 5208 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 5209 return nh_grp; 5210 5211 err_nexthop_group_insert: 5212 err_nexthop6_init: 5213 for (i--; i >= 0; i--) { 5214 nh = &nh_grp->nexthops[i]; 5215 mlxsw_sp_nexthop6_fini(mlxsw_sp, nh); 5216 } 5217 kfree(nh_grp); 5218 return ERR_PTR(err); 5219 } 5220 5221 static void 5222 mlxsw_sp_nexthop6_group_destroy(struct mlxsw_sp *mlxsw_sp, 5223 struct mlxsw_sp_nexthop_group *nh_grp) 5224 { 5225 struct mlxsw_sp_nexthop *nh; 5226 int i = nh_grp->count; 5227 5228 mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp); 5229 for (i--; i >= 0; i--) { 5230 nh = &nh_grp->nexthops[i]; 5231 mlxsw_sp_nexthop6_fini(mlxsw_sp, nh); 5232 } 5233 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 5234 WARN_ON(nh_grp->adj_index_valid); 5235 kfree(nh_grp); 5236 } 5237 5238 static int mlxsw_sp_nexthop6_group_get(struct mlxsw_sp *mlxsw_sp, 5239 struct mlxsw_sp_fib6_entry *fib6_entry) 5240 { 5241 struct mlxsw_sp_nexthop_group *nh_grp; 5242 5243 nh_grp = mlxsw_sp_nexthop6_group_lookup(mlxsw_sp, fib6_entry); 5244 if (!nh_grp) { 5245 nh_grp = mlxsw_sp_nexthop6_group_create(mlxsw_sp, fib6_entry); 5246 if (IS_ERR(nh_grp)) 5247 return PTR_ERR(nh_grp); 5248 } 5249 5250 list_add_tail(&fib6_entry->common.nexthop_group_node, 5251 &nh_grp->fib_list); 5252 fib6_entry->common.nh_group = nh_grp; 5253 5254 /* The route and the nexthop are described by the same struct, so we 5255 * need to the update the nexthop offload indication for the new route. 5256 */ 5257 __mlxsw_sp_nexthop6_group_offload_refresh(nh_grp, fib6_entry); 5258 5259 return 0; 5260 } 5261 5262 static void mlxsw_sp_nexthop6_group_put(struct mlxsw_sp *mlxsw_sp, 5263 struct mlxsw_sp_fib_entry *fib_entry) 5264 { 5265 struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 5266 5267 list_del(&fib_entry->nexthop_group_node); 5268 if (!list_empty(&nh_grp->fib_list)) 5269 return; 5270 mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, nh_grp); 5271 } 5272 5273 static int 5274 mlxsw_sp_nexthop6_group_update(struct mlxsw_sp *mlxsw_sp, 5275 struct mlxsw_sp_fib6_entry *fib6_entry) 5276 { 5277 struct mlxsw_sp_nexthop_group *old_nh_grp = fib6_entry->common.nh_group; 5278 int err; 5279 5280 fib6_entry->common.nh_group = NULL; 5281 list_del(&fib6_entry->common.nexthop_group_node); 5282 5283 err = mlxsw_sp_nexthop6_group_get(mlxsw_sp, fib6_entry); 5284 if (err) 5285 goto err_nexthop6_group_get; 5286 5287 /* In case this entry is offloaded, then the adjacency index 5288 * currently associated with it in the device's table is that 5289 * of the old group. Start using the new one instead. 5290 */ 5291 err = mlxsw_sp_fib_entry_update(mlxsw_sp, &fib6_entry->common); 5292 if (err) 5293 goto err_fib_entry_update; 5294 5295 if (list_empty(&old_nh_grp->fib_list)) 5296 mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, old_nh_grp); 5297 5298 return 0; 5299 5300 err_fib_entry_update: 5301 mlxsw_sp_nexthop6_group_put(mlxsw_sp, &fib6_entry->common); 5302 err_nexthop6_group_get: 5303 list_add_tail(&fib6_entry->common.nexthop_group_node, 5304 &old_nh_grp->fib_list); 5305 fib6_entry->common.nh_group = old_nh_grp; 5306 return err; 5307 } 5308 5309 static int 5310 mlxsw_sp_fib6_entry_nexthop_add(struct mlxsw_sp *mlxsw_sp, 5311 struct mlxsw_sp_fib6_entry *fib6_entry, 5312 struct fib6_info **rt_arr, unsigned int nrt6) 5313 { 5314 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5315 int err, i; 5316 5317 for (i = 0; i < nrt6; i++) { 5318 mlxsw_sp_rt6 = mlxsw_sp_rt6_create(rt_arr[i]); 5319 if (IS_ERR(mlxsw_sp_rt6)) { 5320 err = PTR_ERR(mlxsw_sp_rt6); 5321 goto err_rt6_create; 5322 } 5323 5324 list_add_tail(&mlxsw_sp_rt6->list, &fib6_entry->rt6_list); 5325 fib6_entry->nrt6++; 5326 } 5327 5328 err = mlxsw_sp_nexthop6_group_update(mlxsw_sp, fib6_entry); 5329 if (err) 5330 goto err_nexthop6_group_update; 5331 5332 return 0; 5333 5334 err_nexthop6_group_update: 5335 i = nrt6; 5336 err_rt6_create: 5337 for (i--; i >= 0; i--) { 5338 fib6_entry->nrt6--; 5339 mlxsw_sp_rt6 = list_last_entry(&fib6_entry->rt6_list, 5340 struct mlxsw_sp_rt6, list); 5341 list_del(&mlxsw_sp_rt6->list); 5342 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 5343 } 5344 return err; 5345 } 5346 5347 static void 5348 mlxsw_sp_fib6_entry_nexthop_del(struct mlxsw_sp *mlxsw_sp, 5349 struct mlxsw_sp_fib6_entry *fib6_entry, 5350 struct fib6_info **rt_arr, unsigned int nrt6) 5351 { 5352 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5353 int i; 5354 5355 for (i = 0; i < nrt6; i++) { 5356 mlxsw_sp_rt6 = mlxsw_sp_fib6_entry_rt_find(fib6_entry, 5357 rt_arr[i]); 5358 if (WARN_ON_ONCE(!mlxsw_sp_rt6)) 5359 continue; 5360 5361 fib6_entry->nrt6--; 5362 list_del(&mlxsw_sp_rt6->list); 5363 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 5364 } 5365 5366 mlxsw_sp_nexthop6_group_update(mlxsw_sp, fib6_entry); 5367 } 5368 5369 static void mlxsw_sp_fib6_entry_type_set(struct mlxsw_sp *mlxsw_sp, 5370 struct mlxsw_sp_fib_entry *fib_entry, 5371 const struct fib6_info *rt) 5372 { 5373 /* Packets hitting RTF_REJECT routes need to be discarded by the 5374 * stack. We can rely on their destination device not having a 5375 * RIF (it's the loopback device) and can thus use action type 5376 * local, which will cause them to be trapped with a lower 5377 * priority than packets that need to be locally received. 5378 */ 5379 if (rt->fib6_flags & (RTF_LOCAL | RTF_ANYCAST)) 5380 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 5381 else if (rt->fib6_type == RTN_BLACKHOLE) 5382 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE; 5383 else if (rt->fib6_flags & RTF_REJECT) 5384 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE; 5385 else if (mlxsw_sp_rt6_is_gateway(mlxsw_sp, rt)) 5386 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_REMOTE; 5387 else 5388 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL; 5389 } 5390 5391 static void 5392 mlxsw_sp_fib6_entry_rt_destroy_all(struct mlxsw_sp_fib6_entry *fib6_entry) 5393 { 5394 struct mlxsw_sp_rt6 *mlxsw_sp_rt6, *tmp; 5395 5396 list_for_each_entry_safe(mlxsw_sp_rt6, tmp, &fib6_entry->rt6_list, 5397 list) { 5398 fib6_entry->nrt6--; 5399 list_del(&mlxsw_sp_rt6->list); 5400 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 5401 } 5402 } 5403 5404 static struct mlxsw_sp_fib6_entry * 5405 mlxsw_sp_fib6_entry_create(struct mlxsw_sp *mlxsw_sp, 5406 struct mlxsw_sp_fib_node *fib_node, 5407 struct fib6_info **rt_arr, unsigned int nrt6) 5408 { 5409 struct mlxsw_sp_fib6_entry *fib6_entry; 5410 struct mlxsw_sp_fib_entry *fib_entry; 5411 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5412 int err, i; 5413 5414 fib6_entry = kzalloc(sizeof(*fib6_entry), GFP_KERNEL); 5415 if (!fib6_entry) 5416 return ERR_PTR(-ENOMEM); 5417 fib_entry = &fib6_entry->common; 5418 5419 INIT_LIST_HEAD(&fib6_entry->rt6_list); 5420 5421 for (i = 0; i < nrt6; i++) { 5422 mlxsw_sp_rt6 = mlxsw_sp_rt6_create(rt_arr[i]); 5423 if (IS_ERR(mlxsw_sp_rt6)) { 5424 err = PTR_ERR(mlxsw_sp_rt6); 5425 goto err_rt6_create; 5426 } 5427 list_add_tail(&mlxsw_sp_rt6->list, &fib6_entry->rt6_list); 5428 fib6_entry->nrt6++; 5429 } 5430 5431 mlxsw_sp_fib6_entry_type_set(mlxsw_sp, fib_entry, rt_arr[0]); 5432 5433 err = mlxsw_sp_nexthop6_group_get(mlxsw_sp, fib6_entry); 5434 if (err) 5435 goto err_nexthop6_group_get; 5436 5437 fib_entry->fib_node = fib_node; 5438 5439 return fib6_entry; 5440 5441 err_nexthop6_group_get: 5442 i = nrt6; 5443 err_rt6_create: 5444 for (i--; i >= 0; i--) { 5445 fib6_entry->nrt6--; 5446 mlxsw_sp_rt6 = list_last_entry(&fib6_entry->rt6_list, 5447 struct mlxsw_sp_rt6, list); 5448 list_del(&mlxsw_sp_rt6->list); 5449 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 5450 } 5451 kfree(fib6_entry); 5452 return ERR_PTR(err); 5453 } 5454 5455 static void mlxsw_sp_fib6_entry_destroy(struct mlxsw_sp *mlxsw_sp, 5456 struct mlxsw_sp_fib6_entry *fib6_entry) 5457 { 5458 mlxsw_sp_nexthop6_group_put(mlxsw_sp, &fib6_entry->common); 5459 mlxsw_sp_fib6_entry_rt_destroy_all(fib6_entry); 5460 WARN_ON(fib6_entry->nrt6); 5461 kfree(fib6_entry); 5462 } 5463 5464 static struct mlxsw_sp_fib6_entry * 5465 mlxsw_sp_fib6_entry_lookup(struct mlxsw_sp *mlxsw_sp, 5466 const struct fib6_info *rt) 5467 { 5468 struct mlxsw_sp_fib6_entry *fib6_entry; 5469 struct mlxsw_sp_fib_node *fib_node; 5470 struct mlxsw_sp_fib *fib; 5471 struct fib6_info *cmp_rt; 5472 struct mlxsw_sp_vr *vr; 5473 5474 vr = mlxsw_sp_vr_find(mlxsw_sp, rt->fib6_table->tb6_id); 5475 if (!vr) 5476 return NULL; 5477 fib = mlxsw_sp_vr_fib(vr, MLXSW_SP_L3_PROTO_IPV6); 5478 5479 fib_node = mlxsw_sp_fib_node_lookup(fib, &rt->fib6_dst.addr, 5480 sizeof(rt->fib6_dst.addr), 5481 rt->fib6_dst.plen); 5482 if (!fib_node) 5483 return NULL; 5484 5485 fib6_entry = container_of(fib_node->fib_entry, 5486 struct mlxsw_sp_fib6_entry, common); 5487 cmp_rt = mlxsw_sp_fib6_entry_rt(fib6_entry); 5488 if (rt->fib6_table->tb6_id == cmp_rt->fib6_table->tb6_id && 5489 rt->fib6_metric == cmp_rt->fib6_metric && 5490 mlxsw_sp_fib6_entry_rt_find(fib6_entry, rt)) 5491 return fib6_entry; 5492 5493 return NULL; 5494 } 5495 5496 static bool mlxsw_sp_fib6_allow_replace(struct mlxsw_sp_fib6_entry *fib6_entry) 5497 { 5498 struct mlxsw_sp_fib_node *fib_node = fib6_entry->common.fib_node; 5499 struct mlxsw_sp_fib6_entry *fib6_replaced; 5500 struct fib6_info *rt, *rt_replaced; 5501 5502 if (!fib_node->fib_entry) 5503 return true; 5504 5505 fib6_replaced = container_of(fib_node->fib_entry, 5506 struct mlxsw_sp_fib6_entry, 5507 common); 5508 rt = mlxsw_sp_fib6_entry_rt(fib6_entry); 5509 rt_replaced = mlxsw_sp_fib6_entry_rt(fib6_replaced); 5510 if (rt->fib6_table->tb6_id == RT_TABLE_MAIN && 5511 rt_replaced->fib6_table->tb6_id == RT_TABLE_LOCAL) 5512 return false; 5513 5514 return true; 5515 } 5516 5517 static int mlxsw_sp_router_fib6_replace(struct mlxsw_sp *mlxsw_sp, 5518 struct fib6_info **rt_arr, 5519 unsigned int nrt6) 5520 { 5521 struct mlxsw_sp_fib6_entry *fib6_entry, *fib6_replaced; 5522 struct mlxsw_sp_fib_entry *replaced; 5523 struct mlxsw_sp_fib_node *fib_node; 5524 struct fib6_info *rt = rt_arr[0]; 5525 int err; 5526 5527 if (mlxsw_sp->router->aborted) 5528 return 0; 5529 5530 if (rt->fib6_src.plen) 5531 return -EINVAL; 5532 5533 if (mlxsw_sp_fib6_rt_should_ignore(rt)) 5534 return 0; 5535 5536 fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, rt->fib6_table->tb6_id, 5537 &rt->fib6_dst.addr, 5538 sizeof(rt->fib6_dst.addr), 5539 rt->fib6_dst.plen, 5540 MLXSW_SP_L3_PROTO_IPV6); 5541 if (IS_ERR(fib_node)) 5542 return PTR_ERR(fib_node); 5543 5544 fib6_entry = mlxsw_sp_fib6_entry_create(mlxsw_sp, fib_node, rt_arr, 5545 nrt6); 5546 if (IS_ERR(fib6_entry)) { 5547 err = PTR_ERR(fib6_entry); 5548 goto err_fib6_entry_create; 5549 } 5550 5551 if (!mlxsw_sp_fib6_allow_replace(fib6_entry)) { 5552 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 5553 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5554 return 0; 5555 } 5556 5557 replaced = fib_node->fib_entry; 5558 err = mlxsw_sp_fib_node_entry_link(mlxsw_sp, &fib6_entry->common); 5559 if (err) 5560 goto err_fib_node_entry_link; 5561 5562 /* Nothing to replace */ 5563 if (!replaced) 5564 return 0; 5565 5566 mlxsw_sp_fib_entry_hw_flags_clear(mlxsw_sp, replaced); 5567 fib6_replaced = container_of(replaced, struct mlxsw_sp_fib6_entry, 5568 common); 5569 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_replaced); 5570 5571 return 0; 5572 5573 err_fib_node_entry_link: 5574 fib_node->fib_entry = replaced; 5575 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 5576 err_fib6_entry_create: 5577 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5578 return err; 5579 } 5580 5581 static int mlxsw_sp_router_fib6_append(struct mlxsw_sp *mlxsw_sp, 5582 struct fib6_info **rt_arr, 5583 unsigned int nrt6) 5584 { 5585 struct mlxsw_sp_fib6_entry *fib6_entry; 5586 struct mlxsw_sp_fib_node *fib_node; 5587 struct fib6_info *rt = rt_arr[0]; 5588 int err; 5589 5590 if (mlxsw_sp->router->aborted) 5591 return 0; 5592 5593 if (rt->fib6_src.plen) 5594 return -EINVAL; 5595 5596 if (mlxsw_sp_fib6_rt_should_ignore(rt)) 5597 return 0; 5598 5599 fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, rt->fib6_table->tb6_id, 5600 &rt->fib6_dst.addr, 5601 sizeof(rt->fib6_dst.addr), 5602 rt->fib6_dst.plen, 5603 MLXSW_SP_L3_PROTO_IPV6); 5604 if (IS_ERR(fib_node)) 5605 return PTR_ERR(fib_node); 5606 5607 if (WARN_ON_ONCE(!fib_node->fib_entry)) { 5608 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5609 return -EINVAL; 5610 } 5611 5612 fib6_entry = container_of(fib_node->fib_entry, 5613 struct mlxsw_sp_fib6_entry, common); 5614 err = mlxsw_sp_fib6_entry_nexthop_add(mlxsw_sp, fib6_entry, rt_arr, 5615 nrt6); 5616 if (err) 5617 goto err_fib6_entry_nexthop_add; 5618 5619 return 0; 5620 5621 err_fib6_entry_nexthop_add: 5622 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5623 return err; 5624 } 5625 5626 static void mlxsw_sp_router_fib6_del(struct mlxsw_sp *mlxsw_sp, 5627 struct fib6_info **rt_arr, 5628 unsigned int nrt6) 5629 { 5630 struct mlxsw_sp_fib6_entry *fib6_entry; 5631 struct mlxsw_sp_fib_node *fib_node; 5632 struct fib6_info *rt = rt_arr[0]; 5633 5634 if (mlxsw_sp->router->aborted) 5635 return; 5636 5637 if (mlxsw_sp_fib6_rt_should_ignore(rt)) 5638 return; 5639 5640 /* Multipath routes are first added to the FIB trie and only then 5641 * notified. If we vetoed the addition, we will get a delete 5642 * notification for a route we do not have. Therefore, do not warn if 5643 * route was not found. 5644 */ 5645 fib6_entry = mlxsw_sp_fib6_entry_lookup(mlxsw_sp, rt); 5646 if (!fib6_entry) 5647 return; 5648 5649 /* If not all the nexthops are deleted, then only reduce the nexthop 5650 * group. 5651 */ 5652 if (nrt6 != fib6_entry->nrt6) { 5653 mlxsw_sp_fib6_entry_nexthop_del(mlxsw_sp, fib6_entry, rt_arr, 5654 nrt6); 5655 return; 5656 } 5657 5658 fib_node = fib6_entry->common.fib_node; 5659 5660 mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, &fib6_entry->common); 5661 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 5662 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5663 } 5664 5665 static int __mlxsw_sp_router_set_abort_trap(struct mlxsw_sp *mlxsw_sp, 5666 enum mlxsw_reg_ralxx_protocol proto, 5667 u8 tree_id) 5668 { 5669 char ralta_pl[MLXSW_REG_RALTA_LEN]; 5670 char ralst_pl[MLXSW_REG_RALST_LEN]; 5671 int i, err; 5672 5673 mlxsw_reg_ralta_pack(ralta_pl, true, proto, tree_id); 5674 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); 5675 if (err) 5676 return err; 5677 5678 mlxsw_reg_ralst_pack(ralst_pl, 0xff, tree_id); 5679 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl); 5680 if (err) 5681 return err; 5682 5683 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 5684 struct mlxsw_sp_vr *vr = &mlxsw_sp->router->vrs[i]; 5685 char raltb_pl[MLXSW_REG_RALTB_LEN]; 5686 char ralue_pl[MLXSW_REG_RALUE_LEN]; 5687 5688 mlxsw_reg_raltb_pack(raltb_pl, vr->id, proto, tree_id); 5689 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), 5690 raltb_pl); 5691 if (err) 5692 return err; 5693 5694 mlxsw_reg_ralue_pack(ralue_pl, proto, 5695 MLXSW_REG_RALUE_OP_WRITE_WRITE, vr->id, 0); 5696 mlxsw_reg_ralue_act_ip2me_pack(ralue_pl); 5697 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), 5698 ralue_pl); 5699 if (err) 5700 return err; 5701 } 5702 5703 return 0; 5704 } 5705 5706 static struct mlxsw_sp_mr_table * 5707 mlxsw_sp_router_fibmr_family_to_table(struct mlxsw_sp_vr *vr, int family) 5708 { 5709 if (family == RTNL_FAMILY_IPMR) 5710 return vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]; 5711 else 5712 return vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]; 5713 } 5714 5715 static int mlxsw_sp_router_fibmr_add(struct mlxsw_sp *mlxsw_sp, 5716 struct mfc_entry_notifier_info *men_info, 5717 bool replace) 5718 { 5719 struct mlxsw_sp_mr_table *mrt; 5720 struct mlxsw_sp_vr *vr; 5721 5722 if (mlxsw_sp->router->aborted) 5723 return 0; 5724 5725 vr = mlxsw_sp_vr_get(mlxsw_sp, men_info->tb_id, NULL); 5726 if (IS_ERR(vr)) 5727 return PTR_ERR(vr); 5728 5729 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, men_info->info.family); 5730 return mlxsw_sp_mr_route_add(mrt, men_info->mfc, replace); 5731 } 5732 5733 static void mlxsw_sp_router_fibmr_del(struct mlxsw_sp *mlxsw_sp, 5734 struct mfc_entry_notifier_info *men_info) 5735 { 5736 struct mlxsw_sp_mr_table *mrt; 5737 struct mlxsw_sp_vr *vr; 5738 5739 if (mlxsw_sp->router->aborted) 5740 return; 5741 5742 vr = mlxsw_sp_vr_find(mlxsw_sp, men_info->tb_id); 5743 if (WARN_ON(!vr)) 5744 return; 5745 5746 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, men_info->info.family); 5747 mlxsw_sp_mr_route_del(mrt, men_info->mfc); 5748 mlxsw_sp_vr_put(mlxsw_sp, vr); 5749 } 5750 5751 static int 5752 mlxsw_sp_router_fibmr_vif_add(struct mlxsw_sp *mlxsw_sp, 5753 struct vif_entry_notifier_info *ven_info) 5754 { 5755 struct mlxsw_sp_mr_table *mrt; 5756 struct mlxsw_sp_rif *rif; 5757 struct mlxsw_sp_vr *vr; 5758 5759 if (mlxsw_sp->router->aborted) 5760 return 0; 5761 5762 vr = mlxsw_sp_vr_get(mlxsw_sp, ven_info->tb_id, NULL); 5763 if (IS_ERR(vr)) 5764 return PTR_ERR(vr); 5765 5766 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, ven_info->info.family); 5767 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, ven_info->dev); 5768 return mlxsw_sp_mr_vif_add(mrt, ven_info->dev, 5769 ven_info->vif_index, 5770 ven_info->vif_flags, rif); 5771 } 5772 5773 static void 5774 mlxsw_sp_router_fibmr_vif_del(struct mlxsw_sp *mlxsw_sp, 5775 struct vif_entry_notifier_info *ven_info) 5776 { 5777 struct mlxsw_sp_mr_table *mrt; 5778 struct mlxsw_sp_vr *vr; 5779 5780 if (mlxsw_sp->router->aborted) 5781 return; 5782 5783 vr = mlxsw_sp_vr_find(mlxsw_sp, ven_info->tb_id); 5784 if (WARN_ON(!vr)) 5785 return; 5786 5787 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, ven_info->info.family); 5788 mlxsw_sp_mr_vif_del(mrt, ven_info->vif_index); 5789 mlxsw_sp_vr_put(mlxsw_sp, vr); 5790 } 5791 5792 static int mlxsw_sp_router_set_abort_trap(struct mlxsw_sp *mlxsw_sp) 5793 { 5794 enum mlxsw_reg_ralxx_protocol proto = MLXSW_REG_RALXX_PROTOCOL_IPV4; 5795 int err; 5796 5797 err = __mlxsw_sp_router_set_abort_trap(mlxsw_sp, proto, 5798 MLXSW_SP_LPM_TREE_MIN); 5799 if (err) 5800 return err; 5801 5802 /* The multicast router code does not need an abort trap as by default, 5803 * packets that don't match any routes are trapped to the CPU. 5804 */ 5805 5806 proto = MLXSW_REG_RALXX_PROTOCOL_IPV6; 5807 return __mlxsw_sp_router_set_abort_trap(mlxsw_sp, proto, 5808 MLXSW_SP_LPM_TREE_MIN + 1); 5809 } 5810 5811 static void mlxsw_sp_fib4_node_flush(struct mlxsw_sp *mlxsw_sp, 5812 struct mlxsw_sp_fib_node *fib_node) 5813 { 5814 struct mlxsw_sp_fib4_entry *fib4_entry; 5815 5816 fib4_entry = container_of(fib_node->fib_entry, 5817 struct mlxsw_sp_fib4_entry, common); 5818 mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, fib_node->fib_entry); 5819 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); 5820 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5821 } 5822 5823 static void mlxsw_sp_fib6_node_flush(struct mlxsw_sp *mlxsw_sp, 5824 struct mlxsw_sp_fib_node *fib_node) 5825 { 5826 struct mlxsw_sp_fib6_entry *fib6_entry; 5827 5828 fib6_entry = container_of(fib_node->fib_entry, 5829 struct mlxsw_sp_fib6_entry, common); 5830 mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, fib_node->fib_entry); 5831 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 5832 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5833 } 5834 5835 static void mlxsw_sp_fib_node_flush(struct mlxsw_sp *mlxsw_sp, 5836 struct mlxsw_sp_fib_node *fib_node) 5837 { 5838 switch (fib_node->fib->proto) { 5839 case MLXSW_SP_L3_PROTO_IPV4: 5840 mlxsw_sp_fib4_node_flush(mlxsw_sp, fib_node); 5841 break; 5842 case MLXSW_SP_L3_PROTO_IPV6: 5843 mlxsw_sp_fib6_node_flush(mlxsw_sp, fib_node); 5844 break; 5845 } 5846 } 5847 5848 static void mlxsw_sp_vr_fib_flush(struct mlxsw_sp *mlxsw_sp, 5849 struct mlxsw_sp_vr *vr, 5850 enum mlxsw_sp_l3proto proto) 5851 { 5852 struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto); 5853 struct mlxsw_sp_fib_node *fib_node, *tmp; 5854 5855 list_for_each_entry_safe(fib_node, tmp, &fib->node_list, list) { 5856 bool do_break = &tmp->list == &fib->node_list; 5857 5858 mlxsw_sp_fib_node_flush(mlxsw_sp, fib_node); 5859 if (do_break) 5860 break; 5861 } 5862 } 5863 5864 static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp) 5865 { 5866 int i, j; 5867 5868 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 5869 struct mlxsw_sp_vr *vr = &mlxsw_sp->router->vrs[i]; 5870 5871 if (!mlxsw_sp_vr_is_used(vr)) 5872 continue; 5873 5874 for (j = 0; j < MLXSW_SP_L3_PROTO_MAX; j++) 5875 mlxsw_sp_mr_table_flush(vr->mr_table[j]); 5876 mlxsw_sp_vr_fib_flush(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV4); 5877 5878 /* If virtual router was only used for IPv4, then it's no 5879 * longer used. 5880 */ 5881 if (!mlxsw_sp_vr_is_used(vr)) 5882 continue; 5883 mlxsw_sp_vr_fib_flush(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV6); 5884 } 5885 5886 /* After flushing all the routes, it is not possible anyone is still 5887 * using the adjacency index that is discarding packets, so free it in 5888 * case it was allocated. 5889 */ 5890 if (!mlxsw_sp->router->adj_discard_index_valid) 5891 return; 5892 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1, 5893 mlxsw_sp->router->adj_discard_index); 5894 mlxsw_sp->router->adj_discard_index_valid = false; 5895 } 5896 5897 static void mlxsw_sp_router_fib_abort(struct mlxsw_sp *mlxsw_sp) 5898 { 5899 int err; 5900 5901 if (mlxsw_sp->router->aborted) 5902 return; 5903 dev_warn(mlxsw_sp->bus_info->dev, "FIB abort triggered. Note that FIB entries are no longer being offloaded to this device.\n"); 5904 mlxsw_sp_router_fib_flush(mlxsw_sp); 5905 mlxsw_sp->router->aborted = true; 5906 err = mlxsw_sp_router_set_abort_trap(mlxsw_sp); 5907 if (err) 5908 dev_warn(mlxsw_sp->bus_info->dev, "Failed to set abort trap.\n"); 5909 } 5910 5911 struct mlxsw_sp_fib6_event_work { 5912 struct fib6_info **rt_arr; 5913 unsigned int nrt6; 5914 }; 5915 5916 struct mlxsw_sp_fib_event_work { 5917 struct work_struct work; 5918 union { 5919 struct mlxsw_sp_fib6_event_work fib6_work; 5920 struct fib_entry_notifier_info fen_info; 5921 struct fib_rule_notifier_info fr_info; 5922 struct fib_nh_notifier_info fnh_info; 5923 struct mfc_entry_notifier_info men_info; 5924 struct vif_entry_notifier_info ven_info; 5925 }; 5926 struct mlxsw_sp *mlxsw_sp; 5927 unsigned long event; 5928 }; 5929 5930 static int 5931 mlxsw_sp_router_fib6_work_init(struct mlxsw_sp_fib6_event_work *fib6_work, 5932 struct fib6_entry_notifier_info *fen6_info) 5933 { 5934 struct fib6_info *rt = fen6_info->rt; 5935 struct fib6_info **rt_arr; 5936 struct fib6_info *iter; 5937 unsigned int nrt6; 5938 int i = 0; 5939 5940 nrt6 = fen6_info->nsiblings + 1; 5941 5942 rt_arr = kcalloc(nrt6, sizeof(struct fib6_info *), GFP_ATOMIC); 5943 if (!rt_arr) 5944 return -ENOMEM; 5945 5946 fib6_work->rt_arr = rt_arr; 5947 fib6_work->nrt6 = nrt6; 5948 5949 rt_arr[0] = rt; 5950 fib6_info_hold(rt); 5951 5952 if (!fen6_info->nsiblings) 5953 return 0; 5954 5955 list_for_each_entry(iter, &rt->fib6_siblings, fib6_siblings) { 5956 if (i == fen6_info->nsiblings) 5957 break; 5958 5959 rt_arr[i + 1] = iter; 5960 fib6_info_hold(iter); 5961 i++; 5962 } 5963 WARN_ON_ONCE(i != fen6_info->nsiblings); 5964 5965 return 0; 5966 } 5967 5968 static void 5969 mlxsw_sp_router_fib6_work_fini(struct mlxsw_sp_fib6_event_work *fib6_work) 5970 { 5971 int i; 5972 5973 for (i = 0; i < fib6_work->nrt6; i++) 5974 mlxsw_sp_rt6_release(fib6_work->rt_arr[i]); 5975 kfree(fib6_work->rt_arr); 5976 } 5977 5978 static void mlxsw_sp_router_fib4_event_work(struct work_struct *work) 5979 { 5980 struct mlxsw_sp_fib_event_work *fib_work = 5981 container_of(work, struct mlxsw_sp_fib_event_work, work); 5982 struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; 5983 int err; 5984 5985 mutex_lock(&mlxsw_sp->router->lock); 5986 mlxsw_sp_span_respin(mlxsw_sp); 5987 5988 switch (fib_work->event) { 5989 case FIB_EVENT_ENTRY_REPLACE: 5990 err = mlxsw_sp_router_fib4_replace(mlxsw_sp, 5991 &fib_work->fen_info); 5992 if (err) 5993 mlxsw_sp_router_fib_abort(mlxsw_sp); 5994 fib_info_put(fib_work->fen_info.fi); 5995 break; 5996 case FIB_EVENT_ENTRY_DEL: 5997 mlxsw_sp_router_fib4_del(mlxsw_sp, &fib_work->fen_info); 5998 fib_info_put(fib_work->fen_info.fi); 5999 break; 6000 case FIB_EVENT_NH_ADD: /* fall through */ 6001 case FIB_EVENT_NH_DEL: 6002 mlxsw_sp_nexthop4_event(mlxsw_sp, fib_work->event, 6003 fib_work->fnh_info.fib_nh); 6004 fib_info_put(fib_work->fnh_info.fib_nh->nh_parent); 6005 break; 6006 } 6007 mutex_unlock(&mlxsw_sp->router->lock); 6008 kfree(fib_work); 6009 } 6010 6011 static void mlxsw_sp_router_fib6_event_work(struct work_struct *work) 6012 { 6013 struct mlxsw_sp_fib_event_work *fib_work = 6014 container_of(work, struct mlxsw_sp_fib_event_work, work); 6015 struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; 6016 int err; 6017 6018 mutex_lock(&mlxsw_sp->router->lock); 6019 mlxsw_sp_span_respin(mlxsw_sp); 6020 6021 switch (fib_work->event) { 6022 case FIB_EVENT_ENTRY_REPLACE: 6023 err = mlxsw_sp_router_fib6_replace(mlxsw_sp, 6024 fib_work->fib6_work.rt_arr, 6025 fib_work->fib6_work.nrt6); 6026 if (err) 6027 mlxsw_sp_router_fib_abort(mlxsw_sp); 6028 mlxsw_sp_router_fib6_work_fini(&fib_work->fib6_work); 6029 break; 6030 case FIB_EVENT_ENTRY_APPEND: 6031 err = mlxsw_sp_router_fib6_append(mlxsw_sp, 6032 fib_work->fib6_work.rt_arr, 6033 fib_work->fib6_work.nrt6); 6034 if (err) 6035 mlxsw_sp_router_fib_abort(mlxsw_sp); 6036 mlxsw_sp_router_fib6_work_fini(&fib_work->fib6_work); 6037 break; 6038 case FIB_EVENT_ENTRY_DEL: 6039 mlxsw_sp_router_fib6_del(mlxsw_sp, 6040 fib_work->fib6_work.rt_arr, 6041 fib_work->fib6_work.nrt6); 6042 mlxsw_sp_router_fib6_work_fini(&fib_work->fib6_work); 6043 break; 6044 } 6045 mutex_unlock(&mlxsw_sp->router->lock); 6046 kfree(fib_work); 6047 } 6048 6049 static void mlxsw_sp_router_fibmr_event_work(struct work_struct *work) 6050 { 6051 struct mlxsw_sp_fib_event_work *fib_work = 6052 container_of(work, struct mlxsw_sp_fib_event_work, work); 6053 struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; 6054 bool replace; 6055 int err; 6056 6057 rtnl_lock(); 6058 mutex_lock(&mlxsw_sp->router->lock); 6059 switch (fib_work->event) { 6060 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 6061 case FIB_EVENT_ENTRY_ADD: 6062 replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE; 6063 6064 err = mlxsw_sp_router_fibmr_add(mlxsw_sp, &fib_work->men_info, 6065 replace); 6066 if (err) 6067 mlxsw_sp_router_fib_abort(mlxsw_sp); 6068 mr_cache_put(fib_work->men_info.mfc); 6069 break; 6070 case FIB_EVENT_ENTRY_DEL: 6071 mlxsw_sp_router_fibmr_del(mlxsw_sp, &fib_work->men_info); 6072 mr_cache_put(fib_work->men_info.mfc); 6073 break; 6074 case FIB_EVENT_VIF_ADD: 6075 err = mlxsw_sp_router_fibmr_vif_add(mlxsw_sp, 6076 &fib_work->ven_info); 6077 if (err) 6078 mlxsw_sp_router_fib_abort(mlxsw_sp); 6079 dev_put(fib_work->ven_info.dev); 6080 break; 6081 case FIB_EVENT_VIF_DEL: 6082 mlxsw_sp_router_fibmr_vif_del(mlxsw_sp, 6083 &fib_work->ven_info); 6084 dev_put(fib_work->ven_info.dev); 6085 break; 6086 } 6087 mutex_unlock(&mlxsw_sp->router->lock); 6088 rtnl_unlock(); 6089 kfree(fib_work); 6090 } 6091 6092 static void mlxsw_sp_router_fib4_event(struct mlxsw_sp_fib_event_work *fib_work, 6093 struct fib_notifier_info *info) 6094 { 6095 struct fib_entry_notifier_info *fen_info; 6096 struct fib_nh_notifier_info *fnh_info; 6097 6098 switch (fib_work->event) { 6099 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 6100 case FIB_EVENT_ENTRY_DEL: 6101 fen_info = container_of(info, struct fib_entry_notifier_info, 6102 info); 6103 fib_work->fen_info = *fen_info; 6104 /* Take reference on fib_info to prevent it from being 6105 * freed while work is queued. Release it afterwards. 6106 */ 6107 fib_info_hold(fib_work->fen_info.fi); 6108 break; 6109 case FIB_EVENT_NH_ADD: /* fall through */ 6110 case FIB_EVENT_NH_DEL: 6111 fnh_info = container_of(info, struct fib_nh_notifier_info, 6112 info); 6113 fib_work->fnh_info = *fnh_info; 6114 fib_info_hold(fib_work->fnh_info.fib_nh->nh_parent); 6115 break; 6116 } 6117 } 6118 6119 static int mlxsw_sp_router_fib6_event(struct mlxsw_sp_fib_event_work *fib_work, 6120 struct fib_notifier_info *info) 6121 { 6122 struct fib6_entry_notifier_info *fen6_info; 6123 int err; 6124 6125 switch (fib_work->event) { 6126 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 6127 case FIB_EVENT_ENTRY_APPEND: /* fall through */ 6128 case FIB_EVENT_ENTRY_DEL: 6129 fen6_info = container_of(info, struct fib6_entry_notifier_info, 6130 info); 6131 err = mlxsw_sp_router_fib6_work_init(&fib_work->fib6_work, 6132 fen6_info); 6133 if (err) 6134 return err; 6135 break; 6136 } 6137 6138 return 0; 6139 } 6140 6141 static void 6142 mlxsw_sp_router_fibmr_event(struct mlxsw_sp_fib_event_work *fib_work, 6143 struct fib_notifier_info *info) 6144 { 6145 switch (fib_work->event) { 6146 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 6147 case FIB_EVENT_ENTRY_ADD: /* fall through */ 6148 case FIB_EVENT_ENTRY_DEL: 6149 memcpy(&fib_work->men_info, info, sizeof(fib_work->men_info)); 6150 mr_cache_hold(fib_work->men_info.mfc); 6151 break; 6152 case FIB_EVENT_VIF_ADD: /* fall through */ 6153 case FIB_EVENT_VIF_DEL: 6154 memcpy(&fib_work->ven_info, info, sizeof(fib_work->ven_info)); 6155 dev_hold(fib_work->ven_info.dev); 6156 break; 6157 } 6158 } 6159 6160 static int mlxsw_sp_router_fib_rule_event(unsigned long event, 6161 struct fib_notifier_info *info, 6162 struct mlxsw_sp *mlxsw_sp) 6163 { 6164 struct netlink_ext_ack *extack = info->extack; 6165 struct fib_rule_notifier_info *fr_info; 6166 struct fib_rule *rule; 6167 int err = 0; 6168 6169 /* nothing to do at the moment */ 6170 if (event == FIB_EVENT_RULE_DEL) 6171 return 0; 6172 6173 if (mlxsw_sp->router->aborted) 6174 return 0; 6175 6176 fr_info = container_of(info, struct fib_rule_notifier_info, info); 6177 rule = fr_info->rule; 6178 6179 /* Rule only affects locally generated traffic */ 6180 if (rule->iifindex == mlxsw_sp_net(mlxsw_sp)->loopback_dev->ifindex) 6181 return 0; 6182 6183 switch (info->family) { 6184 case AF_INET: 6185 if (!fib4_rule_default(rule) && !rule->l3mdev) 6186 err = -EOPNOTSUPP; 6187 break; 6188 case AF_INET6: 6189 if (!fib6_rule_default(rule) && !rule->l3mdev) 6190 err = -EOPNOTSUPP; 6191 break; 6192 case RTNL_FAMILY_IPMR: 6193 if (!ipmr_rule_default(rule) && !rule->l3mdev) 6194 err = -EOPNOTSUPP; 6195 break; 6196 case RTNL_FAMILY_IP6MR: 6197 if (!ip6mr_rule_default(rule) && !rule->l3mdev) 6198 err = -EOPNOTSUPP; 6199 break; 6200 } 6201 6202 if (err < 0) 6203 NL_SET_ERR_MSG_MOD(extack, "FIB rules not supported"); 6204 6205 return err; 6206 } 6207 6208 /* Called with rcu_read_lock() */ 6209 static int mlxsw_sp_router_fib_event(struct notifier_block *nb, 6210 unsigned long event, void *ptr) 6211 { 6212 struct mlxsw_sp_fib_event_work *fib_work; 6213 struct fib_notifier_info *info = ptr; 6214 struct mlxsw_sp_router *router; 6215 int err; 6216 6217 if ((info->family != AF_INET && info->family != AF_INET6 && 6218 info->family != RTNL_FAMILY_IPMR && 6219 info->family != RTNL_FAMILY_IP6MR)) 6220 return NOTIFY_DONE; 6221 6222 router = container_of(nb, struct mlxsw_sp_router, fib_nb); 6223 6224 switch (event) { 6225 case FIB_EVENT_RULE_ADD: /* fall through */ 6226 case FIB_EVENT_RULE_DEL: 6227 err = mlxsw_sp_router_fib_rule_event(event, info, 6228 router->mlxsw_sp); 6229 return notifier_from_errno(err); 6230 case FIB_EVENT_ENTRY_ADD: /* fall through */ 6231 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 6232 case FIB_EVENT_ENTRY_APPEND: 6233 if (router->aborted) { 6234 NL_SET_ERR_MSG_MOD(info->extack, "FIB offload was aborted. Not configuring route"); 6235 return notifier_from_errno(-EINVAL); 6236 } 6237 if (info->family == AF_INET) { 6238 struct fib_entry_notifier_info *fen_info = ptr; 6239 6240 if (fen_info->fi->fib_nh_is_v6) { 6241 NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported"); 6242 return notifier_from_errno(-EINVAL); 6243 } 6244 if (fen_info->fi->nh) { 6245 NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported"); 6246 return notifier_from_errno(-EINVAL); 6247 } 6248 } else if (info->family == AF_INET6) { 6249 struct fib6_entry_notifier_info *fen6_info; 6250 6251 fen6_info = container_of(info, 6252 struct fib6_entry_notifier_info, 6253 info); 6254 if (fen6_info->rt->nh) { 6255 NL_SET_ERR_MSG_MOD(info->extack, "IPv6 route with nexthop objects is not supported"); 6256 return notifier_from_errno(-EINVAL); 6257 } 6258 } 6259 break; 6260 } 6261 6262 fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC); 6263 if (WARN_ON(!fib_work)) 6264 return NOTIFY_BAD; 6265 6266 fib_work->mlxsw_sp = router->mlxsw_sp; 6267 fib_work->event = event; 6268 6269 switch (info->family) { 6270 case AF_INET: 6271 INIT_WORK(&fib_work->work, mlxsw_sp_router_fib4_event_work); 6272 mlxsw_sp_router_fib4_event(fib_work, info); 6273 break; 6274 case AF_INET6: 6275 INIT_WORK(&fib_work->work, mlxsw_sp_router_fib6_event_work); 6276 err = mlxsw_sp_router_fib6_event(fib_work, info); 6277 if (err) 6278 goto err_fib_event; 6279 break; 6280 case RTNL_FAMILY_IP6MR: 6281 case RTNL_FAMILY_IPMR: 6282 INIT_WORK(&fib_work->work, mlxsw_sp_router_fibmr_event_work); 6283 mlxsw_sp_router_fibmr_event(fib_work, info); 6284 break; 6285 } 6286 6287 mlxsw_core_schedule_work(&fib_work->work); 6288 6289 return NOTIFY_DONE; 6290 6291 err_fib_event: 6292 kfree(fib_work); 6293 return NOTIFY_BAD; 6294 } 6295 6296 static struct mlxsw_sp_rif * 6297 mlxsw_sp_rif_find_by_dev(const struct mlxsw_sp *mlxsw_sp, 6298 const struct net_device *dev) 6299 { 6300 int i; 6301 6302 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) 6303 if (mlxsw_sp->router->rifs[i] && 6304 mlxsw_sp->router->rifs[i]->dev == dev) 6305 return mlxsw_sp->router->rifs[i]; 6306 6307 return NULL; 6308 } 6309 6310 bool mlxsw_sp_rif_exists(struct mlxsw_sp *mlxsw_sp, 6311 const struct net_device *dev) 6312 { 6313 struct mlxsw_sp_rif *rif; 6314 6315 mutex_lock(&mlxsw_sp->router->lock); 6316 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 6317 mutex_unlock(&mlxsw_sp->router->lock); 6318 6319 return rif; 6320 } 6321 6322 u16 mlxsw_sp_rif_vid(struct mlxsw_sp *mlxsw_sp, const struct net_device *dev) 6323 { 6324 struct mlxsw_sp_rif *rif; 6325 u16 vid = 0; 6326 6327 mutex_lock(&mlxsw_sp->router->lock); 6328 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 6329 if (!rif) 6330 goto out; 6331 6332 /* We only return the VID for VLAN RIFs. Otherwise we return an 6333 * invalid value (0). 6334 */ 6335 if (rif->ops->type != MLXSW_SP_RIF_TYPE_VLAN) 6336 goto out; 6337 6338 vid = mlxsw_sp_fid_8021q_vid(rif->fid); 6339 6340 out: 6341 mutex_unlock(&mlxsw_sp->router->lock); 6342 return vid; 6343 } 6344 6345 static int mlxsw_sp_router_rif_disable(struct mlxsw_sp *mlxsw_sp, u16 rif) 6346 { 6347 char ritr_pl[MLXSW_REG_RITR_LEN]; 6348 int err; 6349 6350 mlxsw_reg_ritr_rif_pack(ritr_pl, rif); 6351 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6352 if (err) 6353 return err; 6354 6355 mlxsw_reg_ritr_enable_set(ritr_pl, false); 6356 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6357 } 6358 6359 static void mlxsw_sp_router_rif_gone_sync(struct mlxsw_sp *mlxsw_sp, 6360 struct mlxsw_sp_rif *rif) 6361 { 6362 mlxsw_sp_router_rif_disable(mlxsw_sp, rif->rif_index); 6363 mlxsw_sp_nexthop_rif_gone_sync(mlxsw_sp, rif); 6364 mlxsw_sp_neigh_rif_gone_sync(mlxsw_sp, rif); 6365 } 6366 6367 static bool 6368 mlxsw_sp_rif_should_config(struct mlxsw_sp_rif *rif, struct net_device *dev, 6369 unsigned long event) 6370 { 6371 struct inet6_dev *inet6_dev; 6372 bool addr_list_empty = true; 6373 struct in_device *idev; 6374 6375 switch (event) { 6376 case NETDEV_UP: 6377 return rif == NULL; 6378 case NETDEV_DOWN: 6379 rcu_read_lock(); 6380 idev = __in_dev_get_rcu(dev); 6381 if (idev && idev->ifa_list) 6382 addr_list_empty = false; 6383 6384 inet6_dev = __in6_dev_get(dev); 6385 if (addr_list_empty && inet6_dev && 6386 !list_empty(&inet6_dev->addr_list)) 6387 addr_list_empty = false; 6388 rcu_read_unlock(); 6389 6390 /* macvlans do not have a RIF, but rather piggy back on the 6391 * RIF of their lower device. 6392 */ 6393 if (netif_is_macvlan(dev) && addr_list_empty) 6394 return true; 6395 6396 if (rif && addr_list_empty && 6397 !netif_is_l3_slave(rif->dev)) 6398 return true; 6399 /* It is possible we already removed the RIF ourselves 6400 * if it was assigned to a netdev that is now a bridge 6401 * or LAG slave. 6402 */ 6403 return false; 6404 } 6405 6406 return false; 6407 } 6408 6409 static enum mlxsw_sp_rif_type 6410 mlxsw_sp_dev_rif_type(const struct mlxsw_sp *mlxsw_sp, 6411 const struct net_device *dev) 6412 { 6413 enum mlxsw_sp_fid_type type; 6414 6415 if (mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL)) 6416 return MLXSW_SP_RIF_TYPE_IPIP_LB; 6417 6418 /* Otherwise RIF type is derived from the type of the underlying FID. */ 6419 if (is_vlan_dev(dev) && netif_is_bridge_master(vlan_dev_real_dev(dev))) 6420 type = MLXSW_SP_FID_TYPE_8021Q; 6421 else if (netif_is_bridge_master(dev) && br_vlan_enabled(dev)) 6422 type = MLXSW_SP_FID_TYPE_8021Q; 6423 else if (netif_is_bridge_master(dev)) 6424 type = MLXSW_SP_FID_TYPE_8021D; 6425 else 6426 type = MLXSW_SP_FID_TYPE_RFID; 6427 6428 return mlxsw_sp_fid_type_rif_type(mlxsw_sp, type); 6429 } 6430 6431 static int mlxsw_sp_rif_index_alloc(struct mlxsw_sp *mlxsw_sp, u16 *p_rif_index) 6432 { 6433 int i; 6434 6435 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) { 6436 if (!mlxsw_sp->router->rifs[i]) { 6437 *p_rif_index = i; 6438 return 0; 6439 } 6440 } 6441 6442 return -ENOBUFS; 6443 } 6444 6445 static struct mlxsw_sp_rif *mlxsw_sp_rif_alloc(size_t rif_size, u16 rif_index, 6446 u16 vr_id, 6447 struct net_device *l3_dev) 6448 { 6449 struct mlxsw_sp_rif *rif; 6450 6451 rif = kzalloc(rif_size, GFP_KERNEL); 6452 if (!rif) 6453 return NULL; 6454 6455 INIT_LIST_HEAD(&rif->nexthop_list); 6456 INIT_LIST_HEAD(&rif->neigh_list); 6457 if (l3_dev) { 6458 ether_addr_copy(rif->addr, l3_dev->dev_addr); 6459 rif->mtu = l3_dev->mtu; 6460 rif->dev = l3_dev; 6461 } 6462 rif->vr_id = vr_id; 6463 rif->rif_index = rif_index; 6464 6465 return rif; 6466 } 6467 6468 struct mlxsw_sp_rif *mlxsw_sp_rif_by_index(const struct mlxsw_sp *mlxsw_sp, 6469 u16 rif_index) 6470 { 6471 return mlxsw_sp->router->rifs[rif_index]; 6472 } 6473 6474 u16 mlxsw_sp_rif_index(const struct mlxsw_sp_rif *rif) 6475 { 6476 return rif->rif_index; 6477 } 6478 6479 u16 mlxsw_sp_ipip_lb_rif_index(const struct mlxsw_sp_rif_ipip_lb *lb_rif) 6480 { 6481 return lb_rif->common.rif_index; 6482 } 6483 6484 u16 mlxsw_sp_ipip_lb_ul_vr_id(const struct mlxsw_sp_rif_ipip_lb *lb_rif) 6485 { 6486 u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(lb_rif->common.dev); 6487 struct mlxsw_sp_vr *ul_vr; 6488 6489 ul_vr = mlxsw_sp_vr_get(lb_rif->common.mlxsw_sp, ul_tb_id, NULL); 6490 if (WARN_ON(IS_ERR(ul_vr))) 6491 return 0; 6492 6493 return ul_vr->id; 6494 } 6495 6496 u16 mlxsw_sp_ipip_lb_ul_rif_id(const struct mlxsw_sp_rif_ipip_lb *lb_rif) 6497 { 6498 return lb_rif->ul_rif_id; 6499 } 6500 6501 int mlxsw_sp_rif_dev_ifindex(const struct mlxsw_sp_rif *rif) 6502 { 6503 return rif->dev->ifindex; 6504 } 6505 6506 const struct net_device *mlxsw_sp_rif_dev(const struct mlxsw_sp_rif *rif) 6507 { 6508 return rif->dev; 6509 } 6510 6511 static struct mlxsw_sp_rif * 6512 mlxsw_sp_rif_create(struct mlxsw_sp *mlxsw_sp, 6513 const struct mlxsw_sp_rif_params *params, 6514 struct netlink_ext_ack *extack) 6515 { 6516 u32 tb_id = l3mdev_fib_table(params->dev); 6517 const struct mlxsw_sp_rif_ops *ops; 6518 struct mlxsw_sp_fid *fid = NULL; 6519 enum mlxsw_sp_rif_type type; 6520 struct mlxsw_sp_rif *rif; 6521 struct mlxsw_sp_vr *vr; 6522 u16 rif_index; 6523 int i, err; 6524 6525 type = mlxsw_sp_dev_rif_type(mlxsw_sp, params->dev); 6526 ops = mlxsw_sp->rif_ops_arr[type]; 6527 6528 vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id ? : RT_TABLE_MAIN, extack); 6529 if (IS_ERR(vr)) 6530 return ERR_CAST(vr); 6531 vr->rif_count++; 6532 6533 err = mlxsw_sp_rif_index_alloc(mlxsw_sp, &rif_index); 6534 if (err) { 6535 NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported router interfaces"); 6536 goto err_rif_index_alloc; 6537 } 6538 6539 rif = mlxsw_sp_rif_alloc(ops->rif_size, rif_index, vr->id, params->dev); 6540 if (!rif) { 6541 err = -ENOMEM; 6542 goto err_rif_alloc; 6543 } 6544 dev_hold(rif->dev); 6545 mlxsw_sp->router->rifs[rif_index] = rif; 6546 rif->mlxsw_sp = mlxsw_sp; 6547 rif->ops = ops; 6548 6549 if (ops->fid_get) { 6550 fid = ops->fid_get(rif, extack); 6551 if (IS_ERR(fid)) { 6552 err = PTR_ERR(fid); 6553 goto err_fid_get; 6554 } 6555 rif->fid = fid; 6556 } 6557 6558 if (ops->setup) 6559 ops->setup(rif, params); 6560 6561 err = ops->configure(rif); 6562 if (err) 6563 goto err_configure; 6564 6565 for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) { 6566 err = mlxsw_sp_mr_rif_add(vr->mr_table[i], rif); 6567 if (err) 6568 goto err_mr_rif_add; 6569 } 6570 6571 mlxsw_sp_rif_counters_alloc(rif); 6572 6573 return rif; 6574 6575 err_mr_rif_add: 6576 for (i--; i >= 0; i--) 6577 mlxsw_sp_mr_rif_del(vr->mr_table[i], rif); 6578 ops->deconfigure(rif); 6579 err_configure: 6580 if (fid) 6581 mlxsw_sp_fid_put(fid); 6582 err_fid_get: 6583 mlxsw_sp->router->rifs[rif_index] = NULL; 6584 dev_put(rif->dev); 6585 kfree(rif); 6586 err_rif_alloc: 6587 err_rif_index_alloc: 6588 vr->rif_count--; 6589 mlxsw_sp_vr_put(mlxsw_sp, vr); 6590 return ERR_PTR(err); 6591 } 6592 6593 static void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif) 6594 { 6595 const struct mlxsw_sp_rif_ops *ops = rif->ops; 6596 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 6597 struct mlxsw_sp_fid *fid = rif->fid; 6598 struct mlxsw_sp_vr *vr; 6599 int i; 6600 6601 mlxsw_sp_router_rif_gone_sync(mlxsw_sp, rif); 6602 vr = &mlxsw_sp->router->vrs[rif->vr_id]; 6603 6604 mlxsw_sp_rif_counters_free(rif); 6605 for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) 6606 mlxsw_sp_mr_rif_del(vr->mr_table[i], rif); 6607 ops->deconfigure(rif); 6608 if (fid) 6609 /* Loopback RIFs are not associated with a FID. */ 6610 mlxsw_sp_fid_put(fid); 6611 mlxsw_sp->router->rifs[rif->rif_index] = NULL; 6612 dev_put(rif->dev); 6613 kfree(rif); 6614 vr->rif_count--; 6615 mlxsw_sp_vr_put(mlxsw_sp, vr); 6616 } 6617 6618 void mlxsw_sp_rif_destroy_by_dev(struct mlxsw_sp *mlxsw_sp, 6619 struct net_device *dev) 6620 { 6621 struct mlxsw_sp_rif *rif; 6622 6623 mutex_lock(&mlxsw_sp->router->lock); 6624 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 6625 if (!rif) 6626 goto out; 6627 mlxsw_sp_rif_destroy(rif); 6628 out: 6629 mutex_unlock(&mlxsw_sp->router->lock); 6630 } 6631 6632 static void 6633 mlxsw_sp_rif_subport_params_init(struct mlxsw_sp_rif_params *params, 6634 struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) 6635 { 6636 struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; 6637 6638 params->vid = mlxsw_sp_port_vlan->vid; 6639 params->lag = mlxsw_sp_port->lagged; 6640 if (params->lag) 6641 params->lag_id = mlxsw_sp_port->lag_id; 6642 else 6643 params->system_port = mlxsw_sp_port->local_port; 6644 } 6645 6646 static struct mlxsw_sp_rif_subport * 6647 mlxsw_sp_rif_subport_rif(const struct mlxsw_sp_rif *rif) 6648 { 6649 return container_of(rif, struct mlxsw_sp_rif_subport, common); 6650 } 6651 6652 static struct mlxsw_sp_rif * 6653 mlxsw_sp_rif_subport_get(struct mlxsw_sp *mlxsw_sp, 6654 const struct mlxsw_sp_rif_params *params, 6655 struct netlink_ext_ack *extack) 6656 { 6657 struct mlxsw_sp_rif_subport *rif_subport; 6658 struct mlxsw_sp_rif *rif; 6659 6660 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, params->dev); 6661 if (!rif) 6662 return mlxsw_sp_rif_create(mlxsw_sp, params, extack); 6663 6664 rif_subport = mlxsw_sp_rif_subport_rif(rif); 6665 refcount_inc(&rif_subport->ref_count); 6666 return rif; 6667 } 6668 6669 static void mlxsw_sp_rif_subport_put(struct mlxsw_sp_rif *rif) 6670 { 6671 struct mlxsw_sp_rif_subport *rif_subport; 6672 6673 rif_subport = mlxsw_sp_rif_subport_rif(rif); 6674 if (!refcount_dec_and_test(&rif_subport->ref_count)) 6675 return; 6676 6677 mlxsw_sp_rif_destroy(rif); 6678 } 6679 6680 static int 6681 mlxsw_sp_port_vlan_router_join(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan, 6682 struct net_device *l3_dev, 6683 struct netlink_ext_ack *extack) 6684 { 6685 struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; 6686 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp; 6687 struct mlxsw_sp_rif_params params = { 6688 .dev = l3_dev, 6689 }; 6690 u16 vid = mlxsw_sp_port_vlan->vid; 6691 struct mlxsw_sp_rif *rif; 6692 struct mlxsw_sp_fid *fid; 6693 int err; 6694 6695 mlxsw_sp_rif_subport_params_init(¶ms, mlxsw_sp_port_vlan); 6696 rif = mlxsw_sp_rif_subport_get(mlxsw_sp, ¶ms, extack); 6697 if (IS_ERR(rif)) 6698 return PTR_ERR(rif); 6699 6700 /* FID was already created, just take a reference */ 6701 fid = rif->ops->fid_get(rif, extack); 6702 err = mlxsw_sp_fid_port_vid_map(fid, mlxsw_sp_port, vid); 6703 if (err) 6704 goto err_fid_port_vid_map; 6705 6706 err = mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, false); 6707 if (err) 6708 goto err_port_vid_learning_set; 6709 6710 err = mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid, 6711 BR_STATE_FORWARDING); 6712 if (err) 6713 goto err_port_vid_stp_set; 6714 6715 mlxsw_sp_port_vlan->fid = fid; 6716 6717 return 0; 6718 6719 err_port_vid_stp_set: 6720 mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true); 6721 err_port_vid_learning_set: 6722 mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid); 6723 err_fid_port_vid_map: 6724 mlxsw_sp_fid_put(fid); 6725 mlxsw_sp_rif_subport_put(rif); 6726 return err; 6727 } 6728 6729 static void 6730 __mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) 6731 { 6732 struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; 6733 struct mlxsw_sp_fid *fid = mlxsw_sp_port_vlan->fid; 6734 struct mlxsw_sp_rif *rif = mlxsw_sp_fid_rif(fid); 6735 u16 vid = mlxsw_sp_port_vlan->vid; 6736 6737 if (WARN_ON(mlxsw_sp_fid_type(fid) != MLXSW_SP_FID_TYPE_RFID)) 6738 return; 6739 6740 mlxsw_sp_port_vlan->fid = NULL; 6741 mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid, BR_STATE_BLOCKING); 6742 mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true); 6743 mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid); 6744 mlxsw_sp_fid_put(fid); 6745 mlxsw_sp_rif_subport_put(rif); 6746 } 6747 6748 void 6749 mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) 6750 { 6751 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port_vlan->mlxsw_sp_port->mlxsw_sp; 6752 6753 mutex_lock(&mlxsw_sp->router->lock); 6754 __mlxsw_sp_port_vlan_router_leave(mlxsw_sp_port_vlan); 6755 mutex_unlock(&mlxsw_sp->router->lock); 6756 } 6757 6758 static int mlxsw_sp_inetaddr_port_vlan_event(struct net_device *l3_dev, 6759 struct net_device *port_dev, 6760 unsigned long event, u16 vid, 6761 struct netlink_ext_ack *extack) 6762 { 6763 struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(port_dev); 6764 struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan; 6765 6766 mlxsw_sp_port_vlan = mlxsw_sp_port_vlan_find_by_vid(mlxsw_sp_port, vid); 6767 if (WARN_ON(!mlxsw_sp_port_vlan)) 6768 return -EINVAL; 6769 6770 switch (event) { 6771 case NETDEV_UP: 6772 return mlxsw_sp_port_vlan_router_join(mlxsw_sp_port_vlan, 6773 l3_dev, extack); 6774 case NETDEV_DOWN: 6775 __mlxsw_sp_port_vlan_router_leave(mlxsw_sp_port_vlan); 6776 break; 6777 } 6778 6779 return 0; 6780 } 6781 6782 static int mlxsw_sp_inetaddr_port_event(struct net_device *port_dev, 6783 unsigned long event, 6784 struct netlink_ext_ack *extack) 6785 { 6786 if (netif_is_bridge_port(port_dev) || 6787 netif_is_lag_port(port_dev) || 6788 netif_is_ovs_port(port_dev)) 6789 return 0; 6790 6791 return mlxsw_sp_inetaddr_port_vlan_event(port_dev, port_dev, event, 6792 MLXSW_SP_DEFAULT_VID, extack); 6793 } 6794 6795 static int __mlxsw_sp_inetaddr_lag_event(struct net_device *l3_dev, 6796 struct net_device *lag_dev, 6797 unsigned long event, u16 vid, 6798 struct netlink_ext_ack *extack) 6799 { 6800 struct net_device *port_dev; 6801 struct list_head *iter; 6802 int err; 6803 6804 netdev_for_each_lower_dev(lag_dev, port_dev, iter) { 6805 if (mlxsw_sp_port_dev_check(port_dev)) { 6806 err = mlxsw_sp_inetaddr_port_vlan_event(l3_dev, 6807 port_dev, 6808 event, vid, 6809 extack); 6810 if (err) 6811 return err; 6812 } 6813 } 6814 6815 return 0; 6816 } 6817 6818 static int mlxsw_sp_inetaddr_lag_event(struct net_device *lag_dev, 6819 unsigned long event, 6820 struct netlink_ext_ack *extack) 6821 { 6822 if (netif_is_bridge_port(lag_dev)) 6823 return 0; 6824 6825 return __mlxsw_sp_inetaddr_lag_event(lag_dev, lag_dev, event, 6826 MLXSW_SP_DEFAULT_VID, extack); 6827 } 6828 6829 static int mlxsw_sp_inetaddr_bridge_event(struct mlxsw_sp *mlxsw_sp, 6830 struct net_device *l3_dev, 6831 unsigned long event, 6832 struct netlink_ext_ack *extack) 6833 { 6834 struct mlxsw_sp_rif_params params = { 6835 .dev = l3_dev, 6836 }; 6837 struct mlxsw_sp_rif *rif; 6838 6839 switch (event) { 6840 case NETDEV_UP: 6841 rif = mlxsw_sp_rif_create(mlxsw_sp, ¶ms, extack); 6842 if (IS_ERR(rif)) 6843 return PTR_ERR(rif); 6844 break; 6845 case NETDEV_DOWN: 6846 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 6847 mlxsw_sp_rif_destroy(rif); 6848 break; 6849 } 6850 6851 return 0; 6852 } 6853 6854 static int mlxsw_sp_inetaddr_vlan_event(struct mlxsw_sp *mlxsw_sp, 6855 struct net_device *vlan_dev, 6856 unsigned long event, 6857 struct netlink_ext_ack *extack) 6858 { 6859 struct net_device *real_dev = vlan_dev_real_dev(vlan_dev); 6860 u16 vid = vlan_dev_vlan_id(vlan_dev); 6861 6862 if (netif_is_bridge_port(vlan_dev)) 6863 return 0; 6864 6865 if (mlxsw_sp_port_dev_check(real_dev)) 6866 return mlxsw_sp_inetaddr_port_vlan_event(vlan_dev, real_dev, 6867 event, vid, extack); 6868 else if (netif_is_lag_master(real_dev)) 6869 return __mlxsw_sp_inetaddr_lag_event(vlan_dev, real_dev, event, 6870 vid, extack); 6871 else if (netif_is_bridge_master(real_dev) && br_vlan_enabled(real_dev)) 6872 return mlxsw_sp_inetaddr_bridge_event(mlxsw_sp, vlan_dev, event, 6873 extack); 6874 6875 return 0; 6876 } 6877 6878 static bool mlxsw_sp_rif_macvlan_is_vrrp4(const u8 *mac) 6879 { 6880 u8 vrrp4[ETH_ALEN] = { 0x00, 0x00, 0x5e, 0x00, 0x01, 0x00 }; 6881 u8 mask[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }; 6882 6883 return ether_addr_equal_masked(mac, vrrp4, mask); 6884 } 6885 6886 static bool mlxsw_sp_rif_macvlan_is_vrrp6(const u8 *mac) 6887 { 6888 u8 vrrp6[ETH_ALEN] = { 0x00, 0x00, 0x5e, 0x00, 0x02, 0x00 }; 6889 u8 mask[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }; 6890 6891 return ether_addr_equal_masked(mac, vrrp6, mask); 6892 } 6893 6894 static int mlxsw_sp_rif_vrrp_op(struct mlxsw_sp *mlxsw_sp, u16 rif_index, 6895 const u8 *mac, bool adding) 6896 { 6897 char ritr_pl[MLXSW_REG_RITR_LEN]; 6898 u8 vrrp_id = adding ? mac[5] : 0; 6899 int err; 6900 6901 if (!mlxsw_sp_rif_macvlan_is_vrrp4(mac) && 6902 !mlxsw_sp_rif_macvlan_is_vrrp6(mac)) 6903 return 0; 6904 6905 mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index); 6906 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6907 if (err) 6908 return err; 6909 6910 if (mlxsw_sp_rif_macvlan_is_vrrp4(mac)) 6911 mlxsw_reg_ritr_if_vrrp_id_ipv4_set(ritr_pl, vrrp_id); 6912 else 6913 mlxsw_reg_ritr_if_vrrp_id_ipv6_set(ritr_pl, vrrp_id); 6914 6915 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6916 } 6917 6918 static int mlxsw_sp_rif_macvlan_add(struct mlxsw_sp *mlxsw_sp, 6919 const struct net_device *macvlan_dev, 6920 struct netlink_ext_ack *extack) 6921 { 6922 struct macvlan_dev *vlan = netdev_priv(macvlan_dev); 6923 struct mlxsw_sp_rif *rif; 6924 int err; 6925 6926 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, vlan->lowerdev); 6927 if (!rif) { 6928 NL_SET_ERR_MSG_MOD(extack, "macvlan is only supported on top of router interfaces"); 6929 return -EOPNOTSUPP; 6930 } 6931 6932 err = mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr, 6933 mlxsw_sp_fid_index(rif->fid), true); 6934 if (err) 6935 return err; 6936 6937 err = mlxsw_sp_rif_vrrp_op(mlxsw_sp, rif->rif_index, 6938 macvlan_dev->dev_addr, true); 6939 if (err) 6940 goto err_rif_vrrp_add; 6941 6942 /* Make sure the bridge driver does not have this MAC pointing at 6943 * some other port. 6944 */ 6945 if (rif->ops->fdb_del) 6946 rif->ops->fdb_del(rif, macvlan_dev->dev_addr); 6947 6948 return 0; 6949 6950 err_rif_vrrp_add: 6951 mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr, 6952 mlxsw_sp_fid_index(rif->fid), false); 6953 return err; 6954 } 6955 6956 static void __mlxsw_sp_rif_macvlan_del(struct mlxsw_sp *mlxsw_sp, 6957 const struct net_device *macvlan_dev) 6958 { 6959 struct macvlan_dev *vlan = netdev_priv(macvlan_dev); 6960 struct mlxsw_sp_rif *rif; 6961 6962 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, vlan->lowerdev); 6963 /* If we do not have a RIF, then we already took care of 6964 * removing the macvlan's MAC during RIF deletion. 6965 */ 6966 if (!rif) 6967 return; 6968 mlxsw_sp_rif_vrrp_op(mlxsw_sp, rif->rif_index, macvlan_dev->dev_addr, 6969 false); 6970 mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr, 6971 mlxsw_sp_fid_index(rif->fid), false); 6972 } 6973 6974 void mlxsw_sp_rif_macvlan_del(struct mlxsw_sp *mlxsw_sp, 6975 const struct net_device *macvlan_dev) 6976 { 6977 mutex_lock(&mlxsw_sp->router->lock); 6978 __mlxsw_sp_rif_macvlan_del(mlxsw_sp, macvlan_dev); 6979 mutex_unlock(&mlxsw_sp->router->lock); 6980 } 6981 6982 static int mlxsw_sp_inetaddr_macvlan_event(struct mlxsw_sp *mlxsw_sp, 6983 struct net_device *macvlan_dev, 6984 unsigned long event, 6985 struct netlink_ext_ack *extack) 6986 { 6987 switch (event) { 6988 case NETDEV_UP: 6989 return mlxsw_sp_rif_macvlan_add(mlxsw_sp, macvlan_dev, extack); 6990 case NETDEV_DOWN: 6991 __mlxsw_sp_rif_macvlan_del(mlxsw_sp, macvlan_dev); 6992 break; 6993 } 6994 6995 return 0; 6996 } 6997 6998 static int mlxsw_sp_router_port_check_rif_addr(struct mlxsw_sp *mlxsw_sp, 6999 struct net_device *dev, 7000 const unsigned char *dev_addr, 7001 struct netlink_ext_ack *extack) 7002 { 7003 struct mlxsw_sp_rif *rif; 7004 int i; 7005 7006 /* A RIF is not created for macvlan netdevs. Their MAC is used to 7007 * populate the FDB 7008 */ 7009 if (netif_is_macvlan(dev) || netif_is_l3_master(dev)) 7010 return 0; 7011 7012 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) { 7013 rif = mlxsw_sp->router->rifs[i]; 7014 if (rif && rif->ops && 7015 rif->ops->type == MLXSW_SP_RIF_TYPE_IPIP_LB) 7016 continue; 7017 if (rif && rif->dev && rif->dev != dev && 7018 !ether_addr_equal_masked(rif->dev->dev_addr, dev_addr, 7019 mlxsw_sp->mac_mask)) { 7020 NL_SET_ERR_MSG_MOD(extack, "All router interface MAC addresses must have the same prefix"); 7021 return -EINVAL; 7022 } 7023 } 7024 7025 return 0; 7026 } 7027 7028 static int __mlxsw_sp_inetaddr_event(struct mlxsw_sp *mlxsw_sp, 7029 struct net_device *dev, 7030 unsigned long event, 7031 struct netlink_ext_ack *extack) 7032 { 7033 if (mlxsw_sp_port_dev_check(dev)) 7034 return mlxsw_sp_inetaddr_port_event(dev, event, extack); 7035 else if (netif_is_lag_master(dev)) 7036 return mlxsw_sp_inetaddr_lag_event(dev, event, extack); 7037 else if (netif_is_bridge_master(dev)) 7038 return mlxsw_sp_inetaddr_bridge_event(mlxsw_sp, dev, event, 7039 extack); 7040 else if (is_vlan_dev(dev)) 7041 return mlxsw_sp_inetaddr_vlan_event(mlxsw_sp, dev, event, 7042 extack); 7043 else if (netif_is_macvlan(dev)) 7044 return mlxsw_sp_inetaddr_macvlan_event(mlxsw_sp, dev, event, 7045 extack); 7046 else 7047 return 0; 7048 } 7049 7050 static int mlxsw_sp_inetaddr_event(struct notifier_block *nb, 7051 unsigned long event, void *ptr) 7052 { 7053 struct in_ifaddr *ifa = (struct in_ifaddr *) ptr; 7054 struct net_device *dev = ifa->ifa_dev->dev; 7055 struct mlxsw_sp_router *router; 7056 struct mlxsw_sp_rif *rif; 7057 int err = 0; 7058 7059 /* NETDEV_UP event is handled by mlxsw_sp_inetaddr_valid_event */ 7060 if (event == NETDEV_UP) 7061 return NOTIFY_DONE; 7062 7063 router = container_of(nb, struct mlxsw_sp_router, inetaddr_nb); 7064 mutex_lock(&router->lock); 7065 rif = mlxsw_sp_rif_find_by_dev(router->mlxsw_sp, dev); 7066 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 7067 goto out; 7068 7069 err = __mlxsw_sp_inetaddr_event(router->mlxsw_sp, dev, event, NULL); 7070 out: 7071 mutex_unlock(&router->lock); 7072 return notifier_from_errno(err); 7073 } 7074 7075 int mlxsw_sp_inetaddr_valid_event(struct notifier_block *unused, 7076 unsigned long event, void *ptr) 7077 { 7078 struct in_validator_info *ivi = (struct in_validator_info *) ptr; 7079 struct net_device *dev = ivi->ivi_dev->dev; 7080 struct mlxsw_sp *mlxsw_sp; 7081 struct mlxsw_sp_rif *rif; 7082 int err = 0; 7083 7084 mlxsw_sp = mlxsw_sp_lower_get(dev); 7085 if (!mlxsw_sp) 7086 return NOTIFY_DONE; 7087 7088 mutex_lock(&mlxsw_sp->router->lock); 7089 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 7090 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 7091 goto out; 7092 7093 err = mlxsw_sp_router_port_check_rif_addr(mlxsw_sp, dev, dev->dev_addr, 7094 ivi->extack); 7095 if (err) 7096 goto out; 7097 7098 err = __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, ivi->extack); 7099 out: 7100 mutex_unlock(&mlxsw_sp->router->lock); 7101 return notifier_from_errno(err); 7102 } 7103 7104 struct mlxsw_sp_inet6addr_event_work { 7105 struct work_struct work; 7106 struct mlxsw_sp *mlxsw_sp; 7107 struct net_device *dev; 7108 unsigned long event; 7109 }; 7110 7111 static void mlxsw_sp_inet6addr_event_work(struct work_struct *work) 7112 { 7113 struct mlxsw_sp_inet6addr_event_work *inet6addr_work = 7114 container_of(work, struct mlxsw_sp_inet6addr_event_work, work); 7115 struct mlxsw_sp *mlxsw_sp = inet6addr_work->mlxsw_sp; 7116 struct net_device *dev = inet6addr_work->dev; 7117 unsigned long event = inet6addr_work->event; 7118 struct mlxsw_sp_rif *rif; 7119 7120 rtnl_lock(); 7121 mutex_lock(&mlxsw_sp->router->lock); 7122 7123 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 7124 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 7125 goto out; 7126 7127 __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, NULL); 7128 out: 7129 mutex_unlock(&mlxsw_sp->router->lock); 7130 rtnl_unlock(); 7131 dev_put(dev); 7132 kfree(inet6addr_work); 7133 } 7134 7135 /* Called with rcu_read_lock() */ 7136 static int mlxsw_sp_inet6addr_event(struct notifier_block *nb, 7137 unsigned long event, void *ptr) 7138 { 7139 struct inet6_ifaddr *if6 = (struct inet6_ifaddr *) ptr; 7140 struct mlxsw_sp_inet6addr_event_work *inet6addr_work; 7141 struct net_device *dev = if6->idev->dev; 7142 struct mlxsw_sp_router *router; 7143 7144 /* NETDEV_UP event is handled by mlxsw_sp_inet6addr_valid_event */ 7145 if (event == NETDEV_UP) 7146 return NOTIFY_DONE; 7147 7148 inet6addr_work = kzalloc(sizeof(*inet6addr_work), GFP_ATOMIC); 7149 if (!inet6addr_work) 7150 return NOTIFY_BAD; 7151 7152 router = container_of(nb, struct mlxsw_sp_router, inet6addr_nb); 7153 INIT_WORK(&inet6addr_work->work, mlxsw_sp_inet6addr_event_work); 7154 inet6addr_work->mlxsw_sp = router->mlxsw_sp; 7155 inet6addr_work->dev = dev; 7156 inet6addr_work->event = event; 7157 dev_hold(dev); 7158 mlxsw_core_schedule_work(&inet6addr_work->work); 7159 7160 return NOTIFY_DONE; 7161 } 7162 7163 int mlxsw_sp_inet6addr_valid_event(struct notifier_block *unused, 7164 unsigned long event, void *ptr) 7165 { 7166 struct in6_validator_info *i6vi = (struct in6_validator_info *) ptr; 7167 struct net_device *dev = i6vi->i6vi_dev->dev; 7168 struct mlxsw_sp *mlxsw_sp; 7169 struct mlxsw_sp_rif *rif; 7170 int err = 0; 7171 7172 mlxsw_sp = mlxsw_sp_lower_get(dev); 7173 if (!mlxsw_sp) 7174 return NOTIFY_DONE; 7175 7176 mutex_lock(&mlxsw_sp->router->lock); 7177 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 7178 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 7179 goto out; 7180 7181 err = mlxsw_sp_router_port_check_rif_addr(mlxsw_sp, dev, dev->dev_addr, 7182 i6vi->extack); 7183 if (err) 7184 goto out; 7185 7186 err = __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, i6vi->extack); 7187 out: 7188 mutex_unlock(&mlxsw_sp->router->lock); 7189 return notifier_from_errno(err); 7190 } 7191 7192 static int mlxsw_sp_rif_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index, 7193 const char *mac, int mtu) 7194 { 7195 char ritr_pl[MLXSW_REG_RITR_LEN]; 7196 int err; 7197 7198 mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index); 7199 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7200 if (err) 7201 return err; 7202 7203 mlxsw_reg_ritr_mtu_set(ritr_pl, mtu); 7204 mlxsw_reg_ritr_if_mac_memcpy_to(ritr_pl, mac); 7205 mlxsw_reg_ritr_op_set(ritr_pl, MLXSW_REG_RITR_RIF_CREATE); 7206 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7207 } 7208 7209 static int 7210 mlxsw_sp_router_port_change_event(struct mlxsw_sp *mlxsw_sp, 7211 struct mlxsw_sp_rif *rif) 7212 { 7213 struct net_device *dev = rif->dev; 7214 u16 fid_index; 7215 int err; 7216 7217 fid_index = mlxsw_sp_fid_index(rif->fid); 7218 7219 err = mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, false); 7220 if (err) 7221 return err; 7222 7223 err = mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, dev->dev_addr, 7224 dev->mtu); 7225 if (err) 7226 goto err_rif_edit; 7227 7228 err = mlxsw_sp_rif_fdb_op(mlxsw_sp, dev->dev_addr, fid_index, true); 7229 if (err) 7230 goto err_rif_fdb_op; 7231 7232 if (rif->mtu != dev->mtu) { 7233 struct mlxsw_sp_vr *vr; 7234 int i; 7235 7236 /* The RIF is relevant only to its mr_table instance, as unlike 7237 * unicast routing, in multicast routing a RIF cannot be shared 7238 * between several multicast routing tables. 7239 */ 7240 vr = &mlxsw_sp->router->vrs[rif->vr_id]; 7241 for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) 7242 mlxsw_sp_mr_rif_mtu_update(vr->mr_table[i], 7243 rif, dev->mtu); 7244 } 7245 7246 ether_addr_copy(rif->addr, dev->dev_addr); 7247 rif->mtu = dev->mtu; 7248 7249 netdev_dbg(dev, "Updated RIF=%d\n", rif->rif_index); 7250 7251 return 0; 7252 7253 err_rif_fdb_op: 7254 mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, rif->addr, rif->mtu); 7255 err_rif_edit: 7256 mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, true); 7257 return err; 7258 } 7259 7260 static int mlxsw_sp_router_port_pre_changeaddr_event(struct mlxsw_sp_rif *rif, 7261 struct netdev_notifier_pre_changeaddr_info *info) 7262 { 7263 struct netlink_ext_ack *extack; 7264 7265 extack = netdev_notifier_info_to_extack(&info->info); 7266 return mlxsw_sp_router_port_check_rif_addr(rif->mlxsw_sp, rif->dev, 7267 info->dev_addr, extack); 7268 } 7269 7270 int mlxsw_sp_netdevice_router_port_event(struct net_device *dev, 7271 unsigned long event, void *ptr) 7272 { 7273 struct mlxsw_sp *mlxsw_sp; 7274 struct mlxsw_sp_rif *rif; 7275 int err = 0; 7276 7277 mlxsw_sp = mlxsw_sp_lower_get(dev); 7278 if (!mlxsw_sp) 7279 return 0; 7280 7281 mutex_lock(&mlxsw_sp->router->lock); 7282 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 7283 if (!rif) 7284 goto out; 7285 7286 switch (event) { 7287 case NETDEV_CHANGEMTU: /* fall through */ 7288 case NETDEV_CHANGEADDR: 7289 err = mlxsw_sp_router_port_change_event(mlxsw_sp, rif); 7290 break; 7291 case NETDEV_PRE_CHANGEADDR: 7292 err = mlxsw_sp_router_port_pre_changeaddr_event(rif, ptr); 7293 break; 7294 } 7295 7296 out: 7297 mutex_unlock(&mlxsw_sp->router->lock); 7298 return err; 7299 } 7300 7301 static int mlxsw_sp_port_vrf_join(struct mlxsw_sp *mlxsw_sp, 7302 struct net_device *l3_dev, 7303 struct netlink_ext_ack *extack) 7304 { 7305 struct mlxsw_sp_rif *rif; 7306 7307 /* If netdev is already associated with a RIF, then we need to 7308 * destroy it and create a new one with the new virtual router ID. 7309 */ 7310 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 7311 if (rif) 7312 __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_DOWN, 7313 extack); 7314 7315 return __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_UP, extack); 7316 } 7317 7318 static void mlxsw_sp_port_vrf_leave(struct mlxsw_sp *mlxsw_sp, 7319 struct net_device *l3_dev) 7320 { 7321 struct mlxsw_sp_rif *rif; 7322 7323 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 7324 if (!rif) 7325 return; 7326 __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_DOWN, NULL); 7327 } 7328 7329 int mlxsw_sp_netdevice_vrf_event(struct net_device *l3_dev, unsigned long event, 7330 struct netdev_notifier_changeupper_info *info) 7331 { 7332 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_lower_get(l3_dev); 7333 int err = 0; 7334 7335 /* We do not create a RIF for a macvlan, but only use it to 7336 * direct more MAC addresses to the router. 7337 */ 7338 if (!mlxsw_sp || netif_is_macvlan(l3_dev)) 7339 return 0; 7340 7341 mutex_lock(&mlxsw_sp->router->lock); 7342 switch (event) { 7343 case NETDEV_PRECHANGEUPPER: 7344 break; 7345 case NETDEV_CHANGEUPPER: 7346 if (info->linking) { 7347 struct netlink_ext_ack *extack; 7348 7349 extack = netdev_notifier_info_to_extack(&info->info); 7350 err = mlxsw_sp_port_vrf_join(mlxsw_sp, l3_dev, extack); 7351 } else { 7352 mlxsw_sp_port_vrf_leave(mlxsw_sp, l3_dev); 7353 } 7354 break; 7355 } 7356 mutex_unlock(&mlxsw_sp->router->lock); 7357 7358 return err; 7359 } 7360 7361 static int __mlxsw_sp_rif_macvlan_flush(struct net_device *dev, void *data) 7362 { 7363 struct mlxsw_sp_rif *rif = data; 7364 7365 if (!netif_is_macvlan(dev)) 7366 return 0; 7367 7368 return mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, dev->dev_addr, 7369 mlxsw_sp_fid_index(rif->fid), false); 7370 } 7371 7372 static int mlxsw_sp_rif_macvlan_flush(struct mlxsw_sp_rif *rif) 7373 { 7374 if (!netif_is_macvlan_port(rif->dev)) 7375 return 0; 7376 7377 netdev_warn(rif->dev, "Router interface is deleted. Upper macvlans will not work\n"); 7378 return netdev_walk_all_upper_dev_rcu(rif->dev, 7379 __mlxsw_sp_rif_macvlan_flush, rif); 7380 } 7381 7382 static void mlxsw_sp_rif_subport_setup(struct mlxsw_sp_rif *rif, 7383 const struct mlxsw_sp_rif_params *params) 7384 { 7385 struct mlxsw_sp_rif_subport *rif_subport; 7386 7387 rif_subport = mlxsw_sp_rif_subport_rif(rif); 7388 refcount_set(&rif_subport->ref_count, 1); 7389 rif_subport->vid = params->vid; 7390 rif_subport->lag = params->lag; 7391 if (params->lag) 7392 rif_subport->lag_id = params->lag_id; 7393 else 7394 rif_subport->system_port = params->system_port; 7395 } 7396 7397 static int mlxsw_sp_rif_subport_op(struct mlxsw_sp_rif *rif, bool enable) 7398 { 7399 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7400 struct mlxsw_sp_rif_subport *rif_subport; 7401 char ritr_pl[MLXSW_REG_RITR_LEN]; 7402 7403 rif_subport = mlxsw_sp_rif_subport_rif(rif); 7404 mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_SP_IF, 7405 rif->rif_index, rif->vr_id, rif->dev->mtu); 7406 mlxsw_reg_ritr_mac_pack(ritr_pl, rif->dev->dev_addr); 7407 mlxsw_reg_ritr_sp_if_pack(ritr_pl, rif_subport->lag, 7408 rif_subport->lag ? rif_subport->lag_id : 7409 rif_subport->system_port, 7410 rif_subport->vid); 7411 7412 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7413 } 7414 7415 static int mlxsw_sp_rif_subport_configure(struct mlxsw_sp_rif *rif) 7416 { 7417 int err; 7418 7419 err = mlxsw_sp_rif_subport_op(rif, true); 7420 if (err) 7421 return err; 7422 7423 err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 7424 mlxsw_sp_fid_index(rif->fid), true); 7425 if (err) 7426 goto err_rif_fdb_op; 7427 7428 mlxsw_sp_fid_rif_set(rif->fid, rif); 7429 return 0; 7430 7431 err_rif_fdb_op: 7432 mlxsw_sp_rif_subport_op(rif, false); 7433 return err; 7434 } 7435 7436 static void mlxsw_sp_rif_subport_deconfigure(struct mlxsw_sp_rif *rif) 7437 { 7438 struct mlxsw_sp_fid *fid = rif->fid; 7439 7440 mlxsw_sp_fid_rif_set(fid, NULL); 7441 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 7442 mlxsw_sp_fid_index(fid), false); 7443 mlxsw_sp_rif_macvlan_flush(rif); 7444 mlxsw_sp_rif_subport_op(rif, false); 7445 } 7446 7447 static struct mlxsw_sp_fid * 7448 mlxsw_sp_rif_subport_fid_get(struct mlxsw_sp_rif *rif, 7449 struct netlink_ext_ack *extack) 7450 { 7451 return mlxsw_sp_fid_rfid_get(rif->mlxsw_sp, rif->rif_index); 7452 } 7453 7454 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_subport_ops = { 7455 .type = MLXSW_SP_RIF_TYPE_SUBPORT, 7456 .rif_size = sizeof(struct mlxsw_sp_rif_subport), 7457 .setup = mlxsw_sp_rif_subport_setup, 7458 .configure = mlxsw_sp_rif_subport_configure, 7459 .deconfigure = mlxsw_sp_rif_subport_deconfigure, 7460 .fid_get = mlxsw_sp_rif_subport_fid_get, 7461 }; 7462 7463 static int mlxsw_sp_rif_vlan_fid_op(struct mlxsw_sp_rif *rif, 7464 enum mlxsw_reg_ritr_if_type type, 7465 u16 vid_fid, bool enable) 7466 { 7467 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7468 char ritr_pl[MLXSW_REG_RITR_LEN]; 7469 7470 mlxsw_reg_ritr_pack(ritr_pl, enable, type, rif->rif_index, rif->vr_id, 7471 rif->dev->mtu); 7472 mlxsw_reg_ritr_mac_pack(ritr_pl, rif->dev->dev_addr); 7473 mlxsw_reg_ritr_fid_set(ritr_pl, type, vid_fid); 7474 7475 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7476 } 7477 7478 u8 mlxsw_sp_router_port(const struct mlxsw_sp *mlxsw_sp) 7479 { 7480 return mlxsw_core_max_ports(mlxsw_sp->core) + 1; 7481 } 7482 7483 static int mlxsw_sp_rif_fid_configure(struct mlxsw_sp_rif *rif) 7484 { 7485 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7486 u16 fid_index = mlxsw_sp_fid_index(rif->fid); 7487 int err; 7488 7489 err = mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, 7490 true); 7491 if (err) 7492 return err; 7493 7494 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 7495 mlxsw_sp_router_port(mlxsw_sp), true); 7496 if (err) 7497 goto err_fid_mc_flood_set; 7498 7499 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 7500 mlxsw_sp_router_port(mlxsw_sp), true); 7501 if (err) 7502 goto err_fid_bc_flood_set; 7503 7504 err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 7505 mlxsw_sp_fid_index(rif->fid), true); 7506 if (err) 7507 goto err_rif_fdb_op; 7508 7509 mlxsw_sp_fid_rif_set(rif->fid, rif); 7510 return 0; 7511 7512 err_rif_fdb_op: 7513 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 7514 mlxsw_sp_router_port(mlxsw_sp), false); 7515 err_fid_bc_flood_set: 7516 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 7517 mlxsw_sp_router_port(mlxsw_sp), false); 7518 err_fid_mc_flood_set: 7519 mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, false); 7520 return err; 7521 } 7522 7523 static void mlxsw_sp_rif_fid_deconfigure(struct mlxsw_sp_rif *rif) 7524 { 7525 u16 fid_index = mlxsw_sp_fid_index(rif->fid); 7526 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7527 struct mlxsw_sp_fid *fid = rif->fid; 7528 7529 mlxsw_sp_fid_rif_set(fid, NULL); 7530 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 7531 mlxsw_sp_fid_index(fid), false); 7532 mlxsw_sp_rif_macvlan_flush(rif); 7533 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 7534 mlxsw_sp_router_port(mlxsw_sp), false); 7535 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 7536 mlxsw_sp_router_port(mlxsw_sp), false); 7537 mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, false); 7538 } 7539 7540 static struct mlxsw_sp_fid * 7541 mlxsw_sp_rif_fid_fid_get(struct mlxsw_sp_rif *rif, 7542 struct netlink_ext_ack *extack) 7543 { 7544 return mlxsw_sp_fid_8021d_get(rif->mlxsw_sp, rif->dev->ifindex); 7545 } 7546 7547 static void mlxsw_sp_rif_fid_fdb_del(struct mlxsw_sp_rif *rif, const char *mac) 7548 { 7549 struct switchdev_notifier_fdb_info info; 7550 struct net_device *dev; 7551 7552 dev = br_fdb_find_port(rif->dev, mac, 0); 7553 if (!dev) 7554 return; 7555 7556 info.addr = mac; 7557 info.vid = 0; 7558 call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE, dev, &info.info, 7559 NULL); 7560 } 7561 7562 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_fid_ops = { 7563 .type = MLXSW_SP_RIF_TYPE_FID, 7564 .rif_size = sizeof(struct mlxsw_sp_rif), 7565 .configure = mlxsw_sp_rif_fid_configure, 7566 .deconfigure = mlxsw_sp_rif_fid_deconfigure, 7567 .fid_get = mlxsw_sp_rif_fid_fid_get, 7568 .fdb_del = mlxsw_sp_rif_fid_fdb_del, 7569 }; 7570 7571 static struct mlxsw_sp_fid * 7572 mlxsw_sp_rif_vlan_fid_get(struct mlxsw_sp_rif *rif, 7573 struct netlink_ext_ack *extack) 7574 { 7575 struct net_device *br_dev = rif->dev; 7576 u16 vid; 7577 int err; 7578 7579 if (is_vlan_dev(rif->dev)) { 7580 vid = vlan_dev_vlan_id(rif->dev); 7581 br_dev = vlan_dev_real_dev(rif->dev); 7582 if (WARN_ON(!netif_is_bridge_master(br_dev))) 7583 return ERR_PTR(-EINVAL); 7584 } else { 7585 err = br_vlan_get_pvid(rif->dev, &vid); 7586 if (err < 0 || !vid) { 7587 NL_SET_ERR_MSG_MOD(extack, "Couldn't determine bridge PVID"); 7588 return ERR_PTR(-EINVAL); 7589 } 7590 } 7591 7592 return mlxsw_sp_fid_8021q_get(rif->mlxsw_sp, vid); 7593 } 7594 7595 static void mlxsw_sp_rif_vlan_fdb_del(struct mlxsw_sp_rif *rif, const char *mac) 7596 { 7597 u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid); 7598 struct switchdev_notifier_fdb_info info; 7599 struct net_device *br_dev; 7600 struct net_device *dev; 7601 7602 br_dev = is_vlan_dev(rif->dev) ? vlan_dev_real_dev(rif->dev) : rif->dev; 7603 dev = br_fdb_find_port(br_dev, mac, vid); 7604 if (!dev) 7605 return; 7606 7607 info.addr = mac; 7608 info.vid = vid; 7609 call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE, dev, &info.info, 7610 NULL); 7611 } 7612 7613 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_vlan_emu_ops = { 7614 .type = MLXSW_SP_RIF_TYPE_VLAN, 7615 .rif_size = sizeof(struct mlxsw_sp_rif), 7616 .configure = mlxsw_sp_rif_fid_configure, 7617 .deconfigure = mlxsw_sp_rif_fid_deconfigure, 7618 .fid_get = mlxsw_sp_rif_vlan_fid_get, 7619 .fdb_del = mlxsw_sp_rif_vlan_fdb_del, 7620 }; 7621 7622 static struct mlxsw_sp_rif_ipip_lb * 7623 mlxsw_sp_rif_ipip_lb_rif(struct mlxsw_sp_rif *rif) 7624 { 7625 return container_of(rif, struct mlxsw_sp_rif_ipip_lb, common); 7626 } 7627 7628 static void 7629 mlxsw_sp_rif_ipip_lb_setup(struct mlxsw_sp_rif *rif, 7630 const struct mlxsw_sp_rif_params *params) 7631 { 7632 struct mlxsw_sp_rif_params_ipip_lb *params_lb; 7633 struct mlxsw_sp_rif_ipip_lb *rif_lb; 7634 7635 params_lb = container_of(params, struct mlxsw_sp_rif_params_ipip_lb, 7636 common); 7637 rif_lb = mlxsw_sp_rif_ipip_lb_rif(rif); 7638 rif_lb->lb_config = params_lb->lb_config; 7639 } 7640 7641 static int 7642 mlxsw_sp1_rif_ipip_lb_configure(struct mlxsw_sp_rif *rif) 7643 { 7644 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 7645 u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(rif->dev); 7646 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7647 struct mlxsw_sp_vr *ul_vr; 7648 int err; 7649 7650 ul_vr = mlxsw_sp_vr_get(mlxsw_sp, ul_tb_id, NULL); 7651 if (IS_ERR(ul_vr)) 7652 return PTR_ERR(ul_vr); 7653 7654 err = mlxsw_sp_rif_ipip_lb_op(lb_rif, ul_vr->id, 0, true); 7655 if (err) 7656 goto err_loopback_op; 7657 7658 lb_rif->ul_vr_id = ul_vr->id; 7659 lb_rif->ul_rif_id = 0; 7660 ++ul_vr->rif_count; 7661 return 0; 7662 7663 err_loopback_op: 7664 mlxsw_sp_vr_put(mlxsw_sp, ul_vr); 7665 return err; 7666 } 7667 7668 static void mlxsw_sp1_rif_ipip_lb_deconfigure(struct mlxsw_sp_rif *rif) 7669 { 7670 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 7671 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7672 struct mlxsw_sp_vr *ul_vr; 7673 7674 ul_vr = &mlxsw_sp->router->vrs[lb_rif->ul_vr_id]; 7675 mlxsw_sp_rif_ipip_lb_op(lb_rif, ul_vr->id, 0, false); 7676 7677 --ul_vr->rif_count; 7678 mlxsw_sp_vr_put(mlxsw_sp, ul_vr); 7679 } 7680 7681 static const struct mlxsw_sp_rif_ops mlxsw_sp1_rif_ipip_lb_ops = { 7682 .type = MLXSW_SP_RIF_TYPE_IPIP_LB, 7683 .rif_size = sizeof(struct mlxsw_sp_rif_ipip_lb), 7684 .setup = mlxsw_sp_rif_ipip_lb_setup, 7685 .configure = mlxsw_sp1_rif_ipip_lb_configure, 7686 .deconfigure = mlxsw_sp1_rif_ipip_lb_deconfigure, 7687 }; 7688 7689 const struct mlxsw_sp_rif_ops *mlxsw_sp1_rif_ops_arr[] = { 7690 [MLXSW_SP_RIF_TYPE_SUBPORT] = &mlxsw_sp_rif_subport_ops, 7691 [MLXSW_SP_RIF_TYPE_VLAN] = &mlxsw_sp_rif_vlan_emu_ops, 7692 [MLXSW_SP_RIF_TYPE_FID] = &mlxsw_sp_rif_fid_ops, 7693 [MLXSW_SP_RIF_TYPE_IPIP_LB] = &mlxsw_sp1_rif_ipip_lb_ops, 7694 }; 7695 7696 static int 7697 mlxsw_sp_rif_ipip_lb_ul_rif_op(struct mlxsw_sp_rif *ul_rif, bool enable) 7698 { 7699 struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp; 7700 char ritr_pl[MLXSW_REG_RITR_LEN]; 7701 7702 mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF, 7703 ul_rif->rif_index, ul_rif->vr_id, IP_MAX_MTU); 7704 mlxsw_reg_ritr_loopback_protocol_set(ritr_pl, 7705 MLXSW_REG_RITR_LOOPBACK_GENERIC); 7706 7707 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7708 } 7709 7710 static struct mlxsw_sp_rif * 7711 mlxsw_sp_ul_rif_create(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr, 7712 struct netlink_ext_ack *extack) 7713 { 7714 struct mlxsw_sp_rif *ul_rif; 7715 u16 rif_index; 7716 int err; 7717 7718 err = mlxsw_sp_rif_index_alloc(mlxsw_sp, &rif_index); 7719 if (err) { 7720 NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported router interfaces"); 7721 return ERR_PTR(err); 7722 } 7723 7724 ul_rif = mlxsw_sp_rif_alloc(sizeof(*ul_rif), rif_index, vr->id, NULL); 7725 if (!ul_rif) 7726 return ERR_PTR(-ENOMEM); 7727 7728 mlxsw_sp->router->rifs[rif_index] = ul_rif; 7729 ul_rif->mlxsw_sp = mlxsw_sp; 7730 err = mlxsw_sp_rif_ipip_lb_ul_rif_op(ul_rif, true); 7731 if (err) 7732 goto ul_rif_op_err; 7733 7734 return ul_rif; 7735 7736 ul_rif_op_err: 7737 mlxsw_sp->router->rifs[rif_index] = NULL; 7738 kfree(ul_rif); 7739 return ERR_PTR(err); 7740 } 7741 7742 static void mlxsw_sp_ul_rif_destroy(struct mlxsw_sp_rif *ul_rif) 7743 { 7744 struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp; 7745 7746 mlxsw_sp_rif_ipip_lb_ul_rif_op(ul_rif, false); 7747 mlxsw_sp->router->rifs[ul_rif->rif_index] = NULL; 7748 kfree(ul_rif); 7749 } 7750 7751 static struct mlxsw_sp_rif * 7752 mlxsw_sp_ul_rif_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, 7753 struct netlink_ext_ack *extack) 7754 { 7755 struct mlxsw_sp_vr *vr; 7756 int err; 7757 7758 vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id, extack); 7759 if (IS_ERR(vr)) 7760 return ERR_CAST(vr); 7761 7762 if (refcount_inc_not_zero(&vr->ul_rif_refcnt)) 7763 return vr->ul_rif; 7764 7765 vr->ul_rif = mlxsw_sp_ul_rif_create(mlxsw_sp, vr, extack); 7766 if (IS_ERR(vr->ul_rif)) { 7767 err = PTR_ERR(vr->ul_rif); 7768 goto err_ul_rif_create; 7769 } 7770 7771 vr->rif_count++; 7772 refcount_set(&vr->ul_rif_refcnt, 1); 7773 7774 return vr->ul_rif; 7775 7776 err_ul_rif_create: 7777 mlxsw_sp_vr_put(mlxsw_sp, vr); 7778 return ERR_PTR(err); 7779 } 7780 7781 static void mlxsw_sp_ul_rif_put(struct mlxsw_sp_rif *ul_rif) 7782 { 7783 struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp; 7784 struct mlxsw_sp_vr *vr; 7785 7786 vr = &mlxsw_sp->router->vrs[ul_rif->vr_id]; 7787 7788 if (!refcount_dec_and_test(&vr->ul_rif_refcnt)) 7789 return; 7790 7791 vr->rif_count--; 7792 mlxsw_sp_ul_rif_destroy(ul_rif); 7793 mlxsw_sp_vr_put(mlxsw_sp, vr); 7794 } 7795 7796 int mlxsw_sp_router_ul_rif_get(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id, 7797 u16 *ul_rif_index) 7798 { 7799 struct mlxsw_sp_rif *ul_rif; 7800 int err = 0; 7801 7802 mutex_lock(&mlxsw_sp->router->lock); 7803 ul_rif = mlxsw_sp_ul_rif_get(mlxsw_sp, ul_tb_id, NULL); 7804 if (IS_ERR(ul_rif)) { 7805 err = PTR_ERR(ul_rif); 7806 goto out; 7807 } 7808 *ul_rif_index = ul_rif->rif_index; 7809 out: 7810 mutex_unlock(&mlxsw_sp->router->lock); 7811 return err; 7812 } 7813 7814 void mlxsw_sp_router_ul_rif_put(struct mlxsw_sp *mlxsw_sp, u16 ul_rif_index) 7815 { 7816 struct mlxsw_sp_rif *ul_rif; 7817 7818 mutex_lock(&mlxsw_sp->router->lock); 7819 ul_rif = mlxsw_sp->router->rifs[ul_rif_index]; 7820 if (WARN_ON(!ul_rif)) 7821 goto out; 7822 7823 mlxsw_sp_ul_rif_put(ul_rif); 7824 out: 7825 mutex_unlock(&mlxsw_sp->router->lock); 7826 } 7827 7828 static int 7829 mlxsw_sp2_rif_ipip_lb_configure(struct mlxsw_sp_rif *rif) 7830 { 7831 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 7832 u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(rif->dev); 7833 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7834 struct mlxsw_sp_rif *ul_rif; 7835 int err; 7836 7837 ul_rif = mlxsw_sp_ul_rif_get(mlxsw_sp, ul_tb_id, NULL); 7838 if (IS_ERR(ul_rif)) 7839 return PTR_ERR(ul_rif); 7840 7841 err = mlxsw_sp_rif_ipip_lb_op(lb_rif, 0, ul_rif->rif_index, true); 7842 if (err) 7843 goto err_loopback_op; 7844 7845 lb_rif->ul_vr_id = 0; 7846 lb_rif->ul_rif_id = ul_rif->rif_index; 7847 7848 return 0; 7849 7850 err_loopback_op: 7851 mlxsw_sp_ul_rif_put(ul_rif); 7852 return err; 7853 } 7854 7855 static void mlxsw_sp2_rif_ipip_lb_deconfigure(struct mlxsw_sp_rif *rif) 7856 { 7857 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 7858 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 7859 struct mlxsw_sp_rif *ul_rif; 7860 7861 ul_rif = mlxsw_sp_rif_by_index(mlxsw_sp, lb_rif->ul_rif_id); 7862 mlxsw_sp_rif_ipip_lb_op(lb_rif, 0, lb_rif->ul_rif_id, false); 7863 mlxsw_sp_ul_rif_put(ul_rif); 7864 } 7865 7866 static const struct mlxsw_sp_rif_ops mlxsw_sp2_rif_ipip_lb_ops = { 7867 .type = MLXSW_SP_RIF_TYPE_IPIP_LB, 7868 .rif_size = sizeof(struct mlxsw_sp_rif_ipip_lb), 7869 .setup = mlxsw_sp_rif_ipip_lb_setup, 7870 .configure = mlxsw_sp2_rif_ipip_lb_configure, 7871 .deconfigure = mlxsw_sp2_rif_ipip_lb_deconfigure, 7872 }; 7873 7874 const struct mlxsw_sp_rif_ops *mlxsw_sp2_rif_ops_arr[] = { 7875 [MLXSW_SP_RIF_TYPE_SUBPORT] = &mlxsw_sp_rif_subport_ops, 7876 [MLXSW_SP_RIF_TYPE_VLAN] = &mlxsw_sp_rif_vlan_emu_ops, 7877 [MLXSW_SP_RIF_TYPE_FID] = &mlxsw_sp_rif_fid_ops, 7878 [MLXSW_SP_RIF_TYPE_IPIP_LB] = &mlxsw_sp2_rif_ipip_lb_ops, 7879 }; 7880 7881 static int mlxsw_sp_rifs_init(struct mlxsw_sp *mlxsw_sp) 7882 { 7883 u64 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); 7884 7885 mlxsw_sp->router->rifs = kcalloc(max_rifs, 7886 sizeof(struct mlxsw_sp_rif *), 7887 GFP_KERNEL); 7888 if (!mlxsw_sp->router->rifs) 7889 return -ENOMEM; 7890 7891 return 0; 7892 } 7893 7894 static void mlxsw_sp_rifs_fini(struct mlxsw_sp *mlxsw_sp) 7895 { 7896 int i; 7897 7898 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) 7899 WARN_ON_ONCE(mlxsw_sp->router->rifs[i]); 7900 7901 kfree(mlxsw_sp->router->rifs); 7902 } 7903 7904 static int 7905 mlxsw_sp_ipip_config_tigcr(struct mlxsw_sp *mlxsw_sp) 7906 { 7907 char tigcr_pl[MLXSW_REG_TIGCR_LEN]; 7908 7909 mlxsw_reg_tigcr_pack(tigcr_pl, true, 0); 7910 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tigcr), tigcr_pl); 7911 } 7912 7913 static int mlxsw_sp_ipips_init(struct mlxsw_sp *mlxsw_sp) 7914 { 7915 int err; 7916 7917 mlxsw_sp->router->ipip_ops_arr = mlxsw_sp_ipip_ops_arr; 7918 INIT_LIST_HEAD(&mlxsw_sp->router->ipip_list); 7919 7920 err = mlxsw_sp_ipip_ecn_encap_init(mlxsw_sp); 7921 if (err) 7922 return err; 7923 err = mlxsw_sp_ipip_ecn_decap_init(mlxsw_sp); 7924 if (err) 7925 return err; 7926 7927 return mlxsw_sp_ipip_config_tigcr(mlxsw_sp); 7928 } 7929 7930 static void mlxsw_sp_ipips_fini(struct mlxsw_sp *mlxsw_sp) 7931 { 7932 WARN_ON(!list_empty(&mlxsw_sp->router->ipip_list)); 7933 } 7934 7935 static void mlxsw_sp_router_fib_dump_flush(struct notifier_block *nb) 7936 { 7937 struct mlxsw_sp_router *router; 7938 7939 /* Flush pending FIB notifications and then flush the device's 7940 * table before requesting another dump. The FIB notification 7941 * block is unregistered, so no need to take RTNL. 7942 */ 7943 mlxsw_core_flush_owq(); 7944 router = container_of(nb, struct mlxsw_sp_router, fib_nb); 7945 mlxsw_sp_router_fib_flush(router->mlxsw_sp); 7946 } 7947 7948 #ifdef CONFIG_IP_ROUTE_MULTIPATH 7949 static void mlxsw_sp_mp_hash_header_set(char *recr2_pl, int header) 7950 { 7951 mlxsw_reg_recr2_outer_header_enables_set(recr2_pl, header, true); 7952 } 7953 7954 static void mlxsw_sp_mp_hash_field_set(char *recr2_pl, int field) 7955 { 7956 mlxsw_reg_recr2_outer_header_fields_enable_set(recr2_pl, field, true); 7957 } 7958 7959 static void mlxsw_sp_mp4_hash_init(struct mlxsw_sp *mlxsw_sp, char *recr2_pl) 7960 { 7961 struct net *net = mlxsw_sp_net(mlxsw_sp); 7962 bool only_l3 = !net->ipv4.sysctl_fib_multipath_hash_policy; 7963 7964 mlxsw_sp_mp_hash_header_set(recr2_pl, 7965 MLXSW_REG_RECR2_IPV4_EN_NOT_TCP_NOT_UDP); 7966 mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_IPV4_EN_TCP_UDP); 7967 mlxsw_reg_recr2_ipv4_sip_enable(recr2_pl); 7968 mlxsw_reg_recr2_ipv4_dip_enable(recr2_pl); 7969 if (only_l3) 7970 return; 7971 mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_EN_IPV4); 7972 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_IPV4_PROTOCOL); 7973 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_SPORT); 7974 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_DPORT); 7975 } 7976 7977 static void mlxsw_sp_mp6_hash_init(struct mlxsw_sp *mlxsw_sp, char *recr2_pl) 7978 { 7979 bool only_l3 = !ip6_multipath_hash_policy(mlxsw_sp_net(mlxsw_sp)); 7980 7981 mlxsw_sp_mp_hash_header_set(recr2_pl, 7982 MLXSW_REG_RECR2_IPV6_EN_NOT_TCP_NOT_UDP); 7983 mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_IPV6_EN_TCP_UDP); 7984 mlxsw_reg_recr2_ipv6_sip_enable(recr2_pl); 7985 mlxsw_reg_recr2_ipv6_dip_enable(recr2_pl); 7986 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_IPV6_NEXT_HEADER); 7987 if (only_l3) { 7988 mlxsw_sp_mp_hash_field_set(recr2_pl, 7989 MLXSW_REG_RECR2_IPV6_FLOW_LABEL); 7990 } else { 7991 mlxsw_sp_mp_hash_header_set(recr2_pl, 7992 MLXSW_REG_RECR2_TCP_UDP_EN_IPV6); 7993 mlxsw_sp_mp_hash_field_set(recr2_pl, 7994 MLXSW_REG_RECR2_TCP_UDP_SPORT); 7995 mlxsw_sp_mp_hash_field_set(recr2_pl, 7996 MLXSW_REG_RECR2_TCP_UDP_DPORT); 7997 } 7998 } 7999 8000 static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp) 8001 { 8002 char recr2_pl[MLXSW_REG_RECR2_LEN]; 8003 u32 seed; 8004 8005 seed = jhash(mlxsw_sp->base_mac, sizeof(mlxsw_sp->base_mac), 0); 8006 mlxsw_reg_recr2_pack(recr2_pl, seed); 8007 mlxsw_sp_mp4_hash_init(mlxsw_sp, recr2_pl); 8008 mlxsw_sp_mp6_hash_init(mlxsw_sp, recr2_pl); 8009 8010 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(recr2), recr2_pl); 8011 } 8012 #else 8013 static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp) 8014 { 8015 return 0; 8016 } 8017 #endif 8018 8019 static int mlxsw_sp_dscp_init(struct mlxsw_sp *mlxsw_sp) 8020 { 8021 char rdpm_pl[MLXSW_REG_RDPM_LEN]; 8022 unsigned int i; 8023 8024 MLXSW_REG_ZERO(rdpm, rdpm_pl); 8025 8026 /* HW is determining switch priority based on DSCP-bits, but the 8027 * kernel is still doing that based on the ToS. Since there's a 8028 * mismatch in bits we need to make sure to translate the right 8029 * value ToS would observe, skipping the 2 least-significant ECN bits. 8030 */ 8031 for (i = 0; i < MLXSW_REG_RDPM_DSCP_ENTRY_REC_MAX_COUNT; i++) 8032 mlxsw_reg_rdpm_pack(rdpm_pl, i, rt_tos2priority(i << 2)); 8033 8034 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rdpm), rdpm_pl); 8035 } 8036 8037 static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp) 8038 { 8039 struct net *net = mlxsw_sp_net(mlxsw_sp); 8040 bool usp = net->ipv4.sysctl_ip_fwd_update_priority; 8041 char rgcr_pl[MLXSW_REG_RGCR_LEN]; 8042 u64 max_rifs; 8043 int err; 8044 8045 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_RIFS)) 8046 return -EIO; 8047 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); 8048 8049 mlxsw_reg_rgcr_pack(rgcr_pl, true, true); 8050 mlxsw_reg_rgcr_max_router_interfaces_set(rgcr_pl, max_rifs); 8051 mlxsw_reg_rgcr_usp_set(rgcr_pl, usp); 8052 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl); 8053 if (err) 8054 return err; 8055 return 0; 8056 } 8057 8058 static void __mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp) 8059 { 8060 char rgcr_pl[MLXSW_REG_RGCR_LEN]; 8061 8062 mlxsw_reg_rgcr_pack(rgcr_pl, false, false); 8063 mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl); 8064 } 8065 8066 int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp, 8067 struct netlink_ext_ack *extack) 8068 { 8069 struct mlxsw_sp_router *router; 8070 int err; 8071 8072 router = kzalloc(sizeof(*mlxsw_sp->router), GFP_KERNEL); 8073 if (!router) 8074 return -ENOMEM; 8075 mutex_init(&router->lock); 8076 mlxsw_sp->router = router; 8077 router->mlxsw_sp = mlxsw_sp; 8078 8079 router->inetaddr_nb.notifier_call = mlxsw_sp_inetaddr_event; 8080 err = register_inetaddr_notifier(&router->inetaddr_nb); 8081 if (err) 8082 goto err_register_inetaddr_notifier; 8083 8084 router->inet6addr_nb.notifier_call = mlxsw_sp_inet6addr_event; 8085 err = register_inet6addr_notifier(&router->inet6addr_nb); 8086 if (err) 8087 goto err_register_inet6addr_notifier; 8088 8089 INIT_LIST_HEAD(&mlxsw_sp->router->nexthop_neighs_list); 8090 err = __mlxsw_sp_router_init(mlxsw_sp); 8091 if (err) 8092 goto err_router_init; 8093 8094 err = mlxsw_sp_rifs_init(mlxsw_sp); 8095 if (err) 8096 goto err_rifs_init; 8097 8098 err = mlxsw_sp_ipips_init(mlxsw_sp); 8099 if (err) 8100 goto err_ipips_init; 8101 8102 err = rhashtable_init(&mlxsw_sp->router->nexthop_ht, 8103 &mlxsw_sp_nexthop_ht_params); 8104 if (err) 8105 goto err_nexthop_ht_init; 8106 8107 err = rhashtable_init(&mlxsw_sp->router->nexthop_group_ht, 8108 &mlxsw_sp_nexthop_group_ht_params); 8109 if (err) 8110 goto err_nexthop_group_ht_init; 8111 8112 INIT_LIST_HEAD(&mlxsw_sp->router->nexthop_list); 8113 err = mlxsw_sp_lpm_init(mlxsw_sp); 8114 if (err) 8115 goto err_lpm_init; 8116 8117 err = mlxsw_sp_mr_init(mlxsw_sp, &mlxsw_sp_mr_tcam_ops); 8118 if (err) 8119 goto err_mr_init; 8120 8121 err = mlxsw_sp_vrs_init(mlxsw_sp); 8122 if (err) 8123 goto err_vrs_init; 8124 8125 err = mlxsw_sp_neigh_init(mlxsw_sp); 8126 if (err) 8127 goto err_neigh_init; 8128 8129 mlxsw_sp->router->netevent_nb.notifier_call = 8130 mlxsw_sp_router_netevent_event; 8131 err = register_netevent_notifier(&mlxsw_sp->router->netevent_nb); 8132 if (err) 8133 goto err_register_netevent_notifier; 8134 8135 err = mlxsw_sp_mp_hash_init(mlxsw_sp); 8136 if (err) 8137 goto err_mp_hash_init; 8138 8139 err = mlxsw_sp_dscp_init(mlxsw_sp); 8140 if (err) 8141 goto err_dscp_init; 8142 8143 mlxsw_sp->router->fib_nb.notifier_call = mlxsw_sp_router_fib_event; 8144 err = register_fib_notifier(mlxsw_sp_net(mlxsw_sp), 8145 &mlxsw_sp->router->fib_nb, 8146 mlxsw_sp_router_fib_dump_flush, extack); 8147 if (err) 8148 goto err_register_fib_notifier; 8149 8150 return 0; 8151 8152 err_register_fib_notifier: 8153 err_dscp_init: 8154 err_mp_hash_init: 8155 unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb); 8156 err_register_netevent_notifier: 8157 mlxsw_sp_neigh_fini(mlxsw_sp); 8158 err_neigh_init: 8159 mlxsw_sp_vrs_fini(mlxsw_sp); 8160 err_vrs_init: 8161 mlxsw_sp_mr_fini(mlxsw_sp); 8162 err_mr_init: 8163 mlxsw_sp_lpm_fini(mlxsw_sp); 8164 err_lpm_init: 8165 rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht); 8166 err_nexthop_group_ht_init: 8167 rhashtable_destroy(&mlxsw_sp->router->nexthop_ht); 8168 err_nexthop_ht_init: 8169 mlxsw_sp_ipips_fini(mlxsw_sp); 8170 err_ipips_init: 8171 mlxsw_sp_rifs_fini(mlxsw_sp); 8172 err_rifs_init: 8173 __mlxsw_sp_router_fini(mlxsw_sp); 8174 err_router_init: 8175 unregister_inet6addr_notifier(&router->inet6addr_nb); 8176 err_register_inet6addr_notifier: 8177 unregister_inetaddr_notifier(&router->inetaddr_nb); 8178 err_register_inetaddr_notifier: 8179 mutex_destroy(&mlxsw_sp->router->lock); 8180 kfree(mlxsw_sp->router); 8181 return err; 8182 } 8183 8184 void mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp) 8185 { 8186 unregister_fib_notifier(mlxsw_sp_net(mlxsw_sp), 8187 &mlxsw_sp->router->fib_nb); 8188 unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb); 8189 mlxsw_sp_neigh_fini(mlxsw_sp); 8190 mlxsw_sp_vrs_fini(mlxsw_sp); 8191 mlxsw_sp_mr_fini(mlxsw_sp); 8192 mlxsw_sp_lpm_fini(mlxsw_sp); 8193 rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht); 8194 rhashtable_destroy(&mlxsw_sp->router->nexthop_ht); 8195 mlxsw_sp_ipips_fini(mlxsw_sp); 8196 mlxsw_sp_rifs_fini(mlxsw_sp); 8197 __mlxsw_sp_router_fini(mlxsw_sp); 8198 unregister_inet6addr_notifier(&mlxsw_sp->router->inet6addr_nb); 8199 unregister_inetaddr_notifier(&mlxsw_sp->router->inetaddr_nb); 8200 mutex_destroy(&mlxsw_sp->router->lock); 8201 kfree(mlxsw_sp->router); 8202 } 8203