1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Copyright (c) 2016 Mellanox Technologies. All rights reserved. 4 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> 5 */ 6 7#include <trace/events/devlink.h> 8 9#include "devl_internal.h" 10 11struct devlink_stats { 12 u64_stats_t rx_bytes; 13 u64_stats_t rx_packets; 14 struct u64_stats_sync syncp; 15}; 16 17/** 18 * struct devlink_trap_policer_item - Packet trap policer attributes. 19 * @policer: Immutable packet trap policer attributes. 20 * @rate: Rate in packets / sec. 21 * @burst: Burst size in packets. 22 * @list: trap_policer_list member. 23 * 24 * Describes packet trap policer attributes. Created by devlink during trap 25 * policer registration. 26 */ 27struct devlink_trap_policer_item { 28 const struct devlink_trap_policer *policer; 29 u64 rate; 30 u64 burst; 31 struct list_head list; 32}; 33 34/** 35 * struct devlink_trap_group_item - Packet trap group attributes. 36 * @group: Immutable packet trap group attributes. 37 * @policer_item: Associated policer item. Can be NULL. 38 * @list: trap_group_list member. 39 * @stats: Trap group statistics. 40 * 41 * Describes packet trap group attributes. Created by devlink during trap 42 * group registration. 43 */ 44struct devlink_trap_group_item { 45 const struct devlink_trap_group *group; 46 struct devlink_trap_policer_item *policer_item; 47 struct list_head list; 48 struct devlink_stats __percpu *stats; 49}; 50 51/** 52 * struct devlink_trap_item - Packet trap attributes. 53 * @trap: Immutable packet trap attributes. 54 * @group_item: Associated group item. 55 * @list: trap_list member. 56 * @action: Trap action. 57 * @stats: Trap statistics. 58 * @priv: Driver private information. 59 * 60 * Describes both mutable and immutable packet trap attributes. Created by 61 * devlink during trap registration and used for all trap related operations. 62 */ 63struct devlink_trap_item { 64 const struct devlink_trap *trap; 65 struct devlink_trap_group_item *group_item; 66 struct list_head list; 67 enum devlink_trap_action action; 68 struct devlink_stats __percpu *stats; 69 void *priv; 70}; 71 72static struct devlink_trap_policer_item * 73devlink_trap_policer_item_lookup(struct devlink *devlink, u32 id) 74{ 75 struct devlink_trap_policer_item *policer_item; 76 77 list_for_each_entry(policer_item, &devlink->trap_policer_list, list) { 78 if (policer_item->policer->id == id) 79 return policer_item; 80 } 81 82 return NULL; 83} 84 85static struct devlink_trap_item * 86devlink_trap_item_lookup(struct devlink *devlink, const char *name) 87{ 88 struct devlink_trap_item *trap_item; 89 90 list_for_each_entry(trap_item, &devlink->trap_list, list) { 91 if (!strcmp(trap_item->trap->name, name)) 92 return trap_item; 93 } 94 95 return NULL; 96} 97 98static struct devlink_trap_item * 99devlink_trap_item_get_from_info(struct devlink *devlink, 100 struct genl_info *info) 101{ 102 struct nlattr *attr; 103 104 if (!info->attrs[DEVLINK_ATTR_TRAP_NAME]) 105 return NULL; 106 attr = info->attrs[DEVLINK_ATTR_TRAP_NAME]; 107 108 return devlink_trap_item_lookup(devlink, nla_data(attr)); 109} 110 111static int 112devlink_trap_action_get_from_info(struct genl_info *info, 113 enum devlink_trap_action *p_trap_action) 114{ 115 u8 val; 116 117 val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]); 118 switch (val) { 119 case DEVLINK_TRAP_ACTION_DROP: 120 case DEVLINK_TRAP_ACTION_TRAP: 121 case DEVLINK_TRAP_ACTION_MIRROR: 122 *p_trap_action = val; 123 break; 124 default: 125 return -EINVAL; 126 } 127 128 return 0; 129} 130 131static int devlink_trap_metadata_put(struct sk_buff *msg, 132 const struct devlink_trap *trap) 133{ 134 struct nlattr *attr; 135 136 attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA); 137 if (!attr) 138 return -EMSGSIZE; 139 140 if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) && 141 nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT)) 142 goto nla_put_failure; 143 if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE) && 144 nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_FA_COOKIE)) 145 goto nla_put_failure; 146 147 nla_nest_end(msg, attr); 148 149 return 0; 150 151nla_put_failure: 152 nla_nest_cancel(msg, attr); 153 return -EMSGSIZE; 154} 155 156static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats, 157 struct devlink_stats *stats) 158{ 159 int i; 160 161 memset(stats, 0, sizeof(*stats)); 162 for_each_possible_cpu(i) { 163 struct devlink_stats *cpu_stats; 164 u64 rx_packets, rx_bytes; 165 unsigned int start; 166 167 cpu_stats = per_cpu_ptr(trap_stats, i); 168 do { 169 start = u64_stats_fetch_begin(&cpu_stats->syncp); 170 rx_packets = u64_stats_read(&cpu_stats->rx_packets); 171 rx_bytes = u64_stats_read(&cpu_stats->rx_bytes); 172 } while (u64_stats_fetch_retry(&cpu_stats->syncp, start)); 173 174 u64_stats_add(&stats->rx_packets, rx_packets); 175 u64_stats_add(&stats->rx_bytes, rx_bytes); 176 } 177} 178 179static int 180devlink_trap_group_stats_put(struct sk_buff *msg, 181 struct devlink_stats __percpu *trap_stats) 182{ 183 struct devlink_stats stats; 184 struct nlattr *attr; 185 186 devlink_trap_stats_read(trap_stats, &stats); 187 188 attr = nla_nest_start(msg, DEVLINK_ATTR_STATS); 189 if (!attr) 190 return -EMSGSIZE; 191 192 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS, 193 u64_stats_read(&stats.rx_packets), 194 DEVLINK_ATTR_PAD)) 195 goto nla_put_failure; 196 197 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES, 198 u64_stats_read(&stats.rx_bytes), 199 DEVLINK_ATTR_PAD)) 200 goto nla_put_failure; 201 202 nla_nest_end(msg, attr); 203 204 return 0; 205 206nla_put_failure: 207 nla_nest_cancel(msg, attr); 208 return -EMSGSIZE; 209} 210 211static int devlink_trap_stats_put(struct sk_buff *msg, struct devlink *devlink, 212 const struct devlink_trap_item *trap_item) 213{ 214 struct devlink_stats stats; 215 struct nlattr *attr; 216 u64 drops = 0; 217 int err; 218 219 if (devlink->ops->trap_drop_counter_get) { 220 err = devlink->ops->trap_drop_counter_get(devlink, 221 trap_item->trap, 222 &drops); 223 if (err) 224 return err; 225 } 226 227 devlink_trap_stats_read(trap_item->stats, &stats); 228 229 attr = nla_nest_start(msg, DEVLINK_ATTR_STATS); 230 if (!attr) 231 return -EMSGSIZE; 232 233 if (devlink->ops->trap_drop_counter_get && 234 nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_DROPPED, drops, 235 DEVLINK_ATTR_PAD)) 236 goto nla_put_failure; 237 238 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS, 239 u64_stats_read(&stats.rx_packets), 240 DEVLINK_ATTR_PAD)) 241 goto nla_put_failure; 242 243 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES, 244 u64_stats_read(&stats.rx_bytes), 245 DEVLINK_ATTR_PAD)) 246 goto nla_put_failure; 247 248 nla_nest_end(msg, attr); 249 250 return 0; 251 252nla_put_failure: 253 nla_nest_cancel(msg, attr); 254 return -EMSGSIZE; 255} 256 257static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink, 258 const struct devlink_trap_item *trap_item, 259 enum devlink_command cmd, u32 portid, u32 seq, 260 int flags) 261{ 262 struct devlink_trap_group_item *group_item = trap_item->group_item; 263 void *hdr; 264 int err; 265 266 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); 267 if (!hdr) 268 return -EMSGSIZE; 269 270 if (devlink_nl_put_handle(msg, devlink)) 271 goto nla_put_failure; 272 273 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME, 274 group_item->group->name)) 275 goto nla_put_failure; 276 277 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name)) 278 goto nla_put_failure; 279 280 if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type)) 281 goto nla_put_failure; 282 283 if (trap_item->trap->generic && 284 nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC)) 285 goto nla_put_failure; 286 287 if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action)) 288 goto nla_put_failure; 289 290 err = devlink_trap_metadata_put(msg, trap_item->trap); 291 if (err) 292 goto nla_put_failure; 293 294 err = devlink_trap_stats_put(msg, devlink, trap_item); 295 if (err) 296 goto nla_put_failure; 297 298 genlmsg_end(msg, hdr); 299 300 return 0; 301 302nla_put_failure: 303 genlmsg_cancel(msg, hdr); 304 return -EMSGSIZE; 305} 306 307int devlink_nl_trap_get_doit(struct sk_buff *skb, struct genl_info *info) 308{ 309 struct netlink_ext_ack *extack = info->extack; 310 struct devlink *devlink = info->user_ptr[0]; 311 struct devlink_trap_item *trap_item; 312 struct sk_buff *msg; 313 int err; 314 315 if (list_empty(&devlink->trap_list)) 316 return -EOPNOTSUPP; 317 318 trap_item = devlink_trap_item_get_from_info(devlink, info); 319 if (!trap_item) { 320 NL_SET_ERR_MSG(extack, "Device did not register this trap"); 321 return -ENOENT; 322 } 323 324 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 325 if (!msg) 326 return -ENOMEM; 327 328 err = devlink_nl_trap_fill(msg, devlink, trap_item, 329 DEVLINK_CMD_TRAP_NEW, info->snd_portid, 330 info->snd_seq, 0); 331 if (err) 332 goto err_trap_fill; 333 334 return genlmsg_reply(msg, info); 335 336err_trap_fill: 337 nlmsg_free(msg); 338 return err; 339} 340 341static int devlink_nl_trap_get_dump_one(struct sk_buff *msg, 342 struct devlink *devlink, 343 struct netlink_callback *cb, int flags) 344{ 345 struct devlink_nl_dump_state *state = devlink_dump_state(cb); 346 struct devlink_trap_item *trap_item; 347 int idx = 0; 348 int err = 0; 349 350 list_for_each_entry(trap_item, &devlink->trap_list, list) { 351 if (idx < state->idx) { 352 idx++; 353 continue; 354 } 355 err = devlink_nl_trap_fill(msg, devlink, trap_item, 356 DEVLINK_CMD_TRAP_NEW, 357 NETLINK_CB(cb->skb).portid, 358 cb->nlh->nlmsg_seq, flags); 359 if (err) { 360 state->idx = idx; 361 break; 362 } 363 idx++; 364 } 365 366 return err; 367} 368 369int devlink_nl_trap_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb) 370{ 371 return devlink_nl_dumpit(skb, cb, devlink_nl_trap_get_dump_one); 372} 373 374static int __devlink_trap_action_set(struct devlink *devlink, 375 struct devlink_trap_item *trap_item, 376 enum devlink_trap_action trap_action, 377 struct netlink_ext_ack *extack) 378{ 379 int err; 380 381 if (trap_item->action != trap_action && 382 trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) { 383 NL_SET_ERR_MSG(extack, "Cannot change action of non-drop traps. Skipping"); 384 return 0; 385 } 386 387 err = devlink->ops->trap_action_set(devlink, trap_item->trap, 388 trap_action, extack); 389 if (err) 390 return err; 391 392 trap_item->action = trap_action; 393 394 return 0; 395} 396 397static int devlink_trap_action_set(struct devlink *devlink, 398 struct devlink_trap_item *trap_item, 399 struct genl_info *info) 400{ 401 enum devlink_trap_action trap_action; 402 int err; 403 404 if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION]) 405 return 0; 406 407 err = devlink_trap_action_get_from_info(info, &trap_action); 408 if (err) { 409 NL_SET_ERR_MSG(info->extack, "Invalid trap action"); 410 return -EINVAL; 411 } 412 413 return __devlink_trap_action_set(devlink, trap_item, trap_action, 414 info->extack); 415} 416 417int devlink_nl_trap_set_doit(struct sk_buff *skb, struct genl_info *info) 418{ 419 struct netlink_ext_ack *extack = info->extack; 420 struct devlink *devlink = info->user_ptr[0]; 421 struct devlink_trap_item *trap_item; 422 423 if (list_empty(&devlink->trap_list)) 424 return -EOPNOTSUPP; 425 426 trap_item = devlink_trap_item_get_from_info(devlink, info); 427 if (!trap_item) { 428 NL_SET_ERR_MSG(extack, "Device did not register this trap"); 429 return -ENOENT; 430 } 431 432 return devlink_trap_action_set(devlink, trap_item, info); 433} 434 435static struct devlink_trap_group_item * 436devlink_trap_group_item_lookup(struct devlink *devlink, const char *name) 437{ 438 struct devlink_trap_group_item *group_item; 439 440 list_for_each_entry(group_item, &devlink->trap_group_list, list) { 441 if (!strcmp(group_item->group->name, name)) 442 return group_item; 443 } 444 445 return NULL; 446} 447 448static struct devlink_trap_group_item * 449devlink_trap_group_item_lookup_by_id(struct devlink *devlink, u16 id) 450{ 451 struct devlink_trap_group_item *group_item; 452 453 list_for_each_entry(group_item, &devlink->trap_group_list, list) { 454 if (group_item->group->id == id) 455 return group_item; 456 } 457 458 return NULL; 459} 460 461static struct devlink_trap_group_item * 462devlink_trap_group_item_get_from_info(struct devlink *devlink, 463 struct genl_info *info) 464{ 465 char *name; 466 467 if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]) 468 return NULL; 469 name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]); 470 471 return devlink_trap_group_item_lookup(devlink, name); 472} 473 474static int 475devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink, 476 const struct devlink_trap_group_item *group_item, 477 enum devlink_command cmd, u32 portid, u32 seq, 478 int flags) 479{ 480 void *hdr; 481 int err; 482 483 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); 484 if (!hdr) 485 return -EMSGSIZE; 486 487 if (devlink_nl_put_handle(msg, devlink)) 488 goto nla_put_failure; 489 490 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME, 491 group_item->group->name)) 492 goto nla_put_failure; 493 494 if (group_item->group->generic && 495 nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC)) 496 goto nla_put_failure; 497 498 if (group_item->policer_item && 499 nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID, 500 group_item->policer_item->policer->id)) 501 goto nla_put_failure; 502 503 err = devlink_trap_group_stats_put(msg, group_item->stats); 504 if (err) 505 goto nla_put_failure; 506 507 genlmsg_end(msg, hdr); 508 509 return 0; 510 511nla_put_failure: 512 genlmsg_cancel(msg, hdr); 513 return -EMSGSIZE; 514} 515 516int devlink_nl_trap_group_get_doit(struct sk_buff *skb, struct genl_info *info) 517{ 518 struct netlink_ext_ack *extack = info->extack; 519 struct devlink *devlink = info->user_ptr[0]; 520 struct devlink_trap_group_item *group_item; 521 struct sk_buff *msg; 522 int err; 523 524 if (list_empty(&devlink->trap_group_list)) 525 return -EOPNOTSUPP; 526 527 group_item = devlink_trap_group_item_get_from_info(devlink, info); 528 if (!group_item) { 529 NL_SET_ERR_MSG(extack, "Device did not register this trap group"); 530 return -ENOENT; 531 } 532 533 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 534 if (!msg) 535 return -ENOMEM; 536 537 err = devlink_nl_trap_group_fill(msg, devlink, group_item, 538 DEVLINK_CMD_TRAP_GROUP_NEW, 539 info->snd_portid, info->snd_seq, 0); 540 if (err) 541 goto err_trap_group_fill; 542 543 return genlmsg_reply(msg, info); 544 545err_trap_group_fill: 546 nlmsg_free(msg); 547 return err; 548} 549 550static int devlink_nl_trap_group_get_dump_one(struct sk_buff *msg, 551 struct devlink *devlink, 552 struct netlink_callback *cb, 553 int flags) 554{ 555 struct devlink_nl_dump_state *state = devlink_dump_state(cb); 556 struct devlink_trap_group_item *group_item; 557 int idx = 0; 558 int err = 0; 559 560 list_for_each_entry(group_item, &devlink->trap_group_list, list) { 561 if (idx < state->idx) { 562 idx++; 563 continue; 564 } 565 err = devlink_nl_trap_group_fill(msg, devlink, group_item, 566 DEVLINK_CMD_TRAP_GROUP_NEW, 567 NETLINK_CB(cb->skb).portid, 568 cb->nlh->nlmsg_seq, flags); 569 if (err) { 570 state->idx = idx; 571 break; 572 } 573 idx++; 574 } 575 576 return err; 577} 578 579int devlink_nl_trap_group_get_dumpit(struct sk_buff *skb, 580 struct netlink_callback *cb) 581{ 582 return devlink_nl_dumpit(skb, cb, devlink_nl_trap_group_get_dump_one); 583} 584 585static int 586__devlink_trap_group_action_set(struct devlink *devlink, 587 struct devlink_trap_group_item *group_item, 588 enum devlink_trap_action trap_action, 589 struct netlink_ext_ack *extack) 590{ 591 const char *group_name = group_item->group->name; 592 struct devlink_trap_item *trap_item; 593 int err; 594 595 if (devlink->ops->trap_group_action_set) { 596 err = devlink->ops->trap_group_action_set(devlink, group_item->group, 597 trap_action, extack); 598 if (err) 599 return err; 600 601 list_for_each_entry(trap_item, &devlink->trap_list, list) { 602 if (strcmp(trap_item->group_item->group->name, group_name)) 603 continue; 604 if (trap_item->action != trap_action && 605 trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) 606 continue; 607 trap_item->action = trap_action; 608 } 609 610 return 0; 611 } 612 613 list_for_each_entry(trap_item, &devlink->trap_list, list) { 614 if (strcmp(trap_item->group_item->group->name, group_name)) 615 continue; 616 err = __devlink_trap_action_set(devlink, trap_item, 617 trap_action, extack); 618 if (err) 619 return err; 620 } 621 622 return 0; 623} 624 625static int 626devlink_trap_group_action_set(struct devlink *devlink, 627 struct devlink_trap_group_item *group_item, 628 struct genl_info *info, bool *p_modified) 629{ 630 enum devlink_trap_action trap_action; 631 int err; 632 633 if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION]) 634 return 0; 635 636 err = devlink_trap_action_get_from_info(info, &trap_action); 637 if (err) { 638 NL_SET_ERR_MSG(info->extack, "Invalid trap action"); 639 return -EINVAL; 640 } 641 642 err = __devlink_trap_group_action_set(devlink, group_item, trap_action, 643 info->extack); 644 if (err) 645 return err; 646 647 *p_modified = true; 648 649 return 0; 650} 651 652static int devlink_trap_group_set(struct devlink *devlink, 653 struct devlink_trap_group_item *group_item, 654 struct genl_info *info) 655{ 656 struct devlink_trap_policer_item *policer_item; 657 struct netlink_ext_ack *extack = info->extack; 658 const struct devlink_trap_policer *policer; 659 struct nlattr **attrs = info->attrs; 660 u32 policer_id; 661 int err; 662 663 if (!attrs[DEVLINK_ATTR_TRAP_POLICER_ID]) 664 return 0; 665 666 if (!devlink->ops->trap_group_set) 667 return -EOPNOTSUPP; 668 669 policer_id = nla_get_u32(attrs[DEVLINK_ATTR_TRAP_POLICER_ID]); 670 policer_item = devlink_trap_policer_item_lookup(devlink, policer_id); 671 if (policer_id && !policer_item) { 672 NL_SET_ERR_MSG(extack, "Device did not register this trap policer"); 673 return -ENOENT; 674 } 675 policer = policer_item ? policer_item->policer : NULL; 676 677 err = devlink->ops->trap_group_set(devlink, group_item->group, policer, 678 extack); 679 if (err) 680 return err; 681 682 group_item->policer_item = policer_item; 683 684 return 0; 685} 686 687int devlink_nl_trap_group_set_doit(struct sk_buff *skb, struct genl_info *info) 688{ 689 struct netlink_ext_ack *extack = info->extack; 690 struct devlink *devlink = info->user_ptr[0]; 691 struct devlink_trap_group_item *group_item; 692 bool modified = false; 693 int err; 694 695 if (list_empty(&devlink->trap_group_list)) 696 return -EOPNOTSUPP; 697 698 group_item = devlink_trap_group_item_get_from_info(devlink, info); 699 if (!group_item) { 700 NL_SET_ERR_MSG(extack, "Device did not register this trap group"); 701 return -ENOENT; 702 } 703 704 err = devlink_trap_group_action_set(devlink, group_item, info, 705 &modified); 706 if (err) 707 return err; 708 709 err = devlink_trap_group_set(devlink, group_item, info); 710 if (err) 711 goto err_trap_group_set; 712 713 return 0; 714 715err_trap_group_set: 716 if (modified) 717 NL_SET_ERR_MSG(extack, "Trap group set failed, but some changes were committed already"); 718 return err; 719} 720 721static struct devlink_trap_policer_item * 722devlink_trap_policer_item_get_from_info(struct devlink *devlink, 723 struct genl_info *info) 724{ 725 u32 id; 726 727 if (!info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID]) 728 return NULL; 729 id = nla_get_u32(info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID]); 730 731 return devlink_trap_policer_item_lookup(devlink, id); 732} 733 734static int 735devlink_trap_policer_stats_put(struct sk_buff *msg, struct devlink *devlink, 736 const struct devlink_trap_policer *policer) 737{ 738 struct nlattr *attr; 739 u64 drops; 740 int err; 741 742 if (!devlink->ops->trap_policer_counter_get) 743 return 0; 744 745 err = devlink->ops->trap_policer_counter_get(devlink, policer, &drops); 746 if (err) 747 return err; 748 749 attr = nla_nest_start(msg, DEVLINK_ATTR_STATS); 750 if (!attr) 751 return -EMSGSIZE; 752 753 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_DROPPED, drops, 754 DEVLINK_ATTR_PAD)) 755 goto nla_put_failure; 756 757 nla_nest_end(msg, attr); 758 759 return 0; 760 761nla_put_failure: 762 nla_nest_cancel(msg, attr); 763 return -EMSGSIZE; 764} 765 766static int 767devlink_nl_trap_policer_fill(struct sk_buff *msg, struct devlink *devlink, 768 const struct devlink_trap_policer_item *policer_item, 769 enum devlink_command cmd, u32 portid, u32 seq, 770 int flags) 771{ 772 void *hdr; 773 int err; 774 775 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); 776 if (!hdr) 777 return -EMSGSIZE; 778 779 if (devlink_nl_put_handle(msg, devlink)) 780 goto nla_put_failure; 781 782 if (nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID, 783 policer_item->policer->id)) 784 goto nla_put_failure; 785 786 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_RATE, 787 policer_item->rate, DEVLINK_ATTR_PAD)) 788 goto nla_put_failure; 789 790 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_BURST, 791 policer_item->burst, DEVLINK_ATTR_PAD)) 792 goto nla_put_failure; 793 794 err = devlink_trap_policer_stats_put(msg, devlink, 795 policer_item->policer); 796 if (err) 797 goto nla_put_failure; 798 799 genlmsg_end(msg, hdr); 800 801 return 0; 802 803nla_put_failure: 804 genlmsg_cancel(msg, hdr); 805 return -EMSGSIZE; 806} 807 808int devlink_nl_trap_policer_get_doit(struct sk_buff *skb, 809 struct genl_info *info) 810{ 811 struct devlink_trap_policer_item *policer_item; 812 struct netlink_ext_ack *extack = info->extack; 813 struct devlink *devlink = info->user_ptr[0]; 814 struct sk_buff *msg; 815 int err; 816 817 if (list_empty(&devlink->trap_policer_list)) 818 return -EOPNOTSUPP; 819 820 policer_item = devlink_trap_policer_item_get_from_info(devlink, info); 821 if (!policer_item) { 822 NL_SET_ERR_MSG(extack, "Device did not register this trap policer"); 823 return -ENOENT; 824 } 825 826 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 827 if (!msg) 828 return -ENOMEM; 829 830 err = devlink_nl_trap_policer_fill(msg, devlink, policer_item, 831 DEVLINK_CMD_TRAP_POLICER_NEW, 832 info->snd_portid, info->snd_seq, 0); 833 if (err) 834 goto err_trap_policer_fill; 835 836 return genlmsg_reply(msg, info); 837 838err_trap_policer_fill: 839 nlmsg_free(msg); 840 return err; 841} 842 843static int devlink_nl_trap_policer_get_dump_one(struct sk_buff *msg, 844 struct devlink *devlink, 845 struct netlink_callback *cb, 846 int flags) 847{ 848 struct devlink_nl_dump_state *state = devlink_dump_state(cb); 849 struct devlink_trap_policer_item *policer_item; 850 int idx = 0; 851 int err = 0; 852 853 list_for_each_entry(policer_item, &devlink->trap_policer_list, list) { 854 if (idx < state->idx) { 855 idx++; 856 continue; 857 } 858 err = devlink_nl_trap_policer_fill(msg, devlink, policer_item, 859 DEVLINK_CMD_TRAP_POLICER_NEW, 860 NETLINK_CB(cb->skb).portid, 861 cb->nlh->nlmsg_seq, flags); 862 if (err) { 863 state->idx = idx; 864 break; 865 } 866 idx++; 867 } 868 869 return err; 870} 871 872int devlink_nl_trap_policer_get_dumpit(struct sk_buff *skb, 873 struct netlink_callback *cb) 874{ 875 return devlink_nl_dumpit(skb, cb, devlink_nl_trap_policer_get_dump_one); 876} 877 878static int 879devlink_trap_policer_set(struct devlink *devlink, 880 struct devlink_trap_policer_item *policer_item, 881 struct genl_info *info) 882{ 883 struct netlink_ext_ack *extack = info->extack; 884 struct nlattr **attrs = info->attrs; 885 u64 rate, burst; 886 int err; 887 888 rate = policer_item->rate; 889 burst = policer_item->burst; 890 891 if (attrs[DEVLINK_ATTR_TRAP_POLICER_RATE]) 892 rate = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_RATE]); 893 894 if (attrs[DEVLINK_ATTR_TRAP_POLICER_BURST]) 895 burst = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_BURST]); 896 897 if (rate < policer_item->policer->min_rate) { 898 NL_SET_ERR_MSG(extack, "Policer rate lower than limit"); 899 return -EINVAL; 900 } 901 902 if (rate > policer_item->policer->max_rate) { 903 NL_SET_ERR_MSG(extack, "Policer rate higher than limit"); 904 return -EINVAL; 905 } 906 907 if (burst < policer_item->policer->min_burst) { 908 NL_SET_ERR_MSG(extack, "Policer burst size lower than limit"); 909 return -EINVAL; 910 } 911 912 if (burst > policer_item->policer->max_burst) { 913 NL_SET_ERR_MSG(extack, "Policer burst size higher than limit"); 914 return -EINVAL; 915 } 916 917 err = devlink->ops->trap_policer_set(devlink, policer_item->policer, 918 rate, burst, info->extack); 919 if (err) 920 return err; 921 922 policer_item->rate = rate; 923 policer_item->burst = burst; 924 925 return 0; 926} 927 928int devlink_nl_trap_policer_set_doit(struct sk_buff *skb, 929 struct genl_info *info) 930{ 931 struct devlink_trap_policer_item *policer_item; 932 struct netlink_ext_ack *extack = info->extack; 933 struct devlink *devlink = info->user_ptr[0]; 934 935 if (list_empty(&devlink->trap_policer_list)) 936 return -EOPNOTSUPP; 937 938 if (!devlink->ops->trap_policer_set) 939 return -EOPNOTSUPP; 940 941 policer_item = devlink_trap_policer_item_get_from_info(devlink, info); 942 if (!policer_item) { 943 NL_SET_ERR_MSG(extack, "Device did not register this trap policer"); 944 return -ENOENT; 945 } 946 947 return devlink_trap_policer_set(devlink, policer_item, info); 948} 949 950#define DEVLINK_TRAP(_id, _type) \ 951 { \ 952 .type = DEVLINK_TRAP_TYPE_##_type, \ 953 .id = DEVLINK_TRAP_GENERIC_ID_##_id, \ 954 .name = DEVLINK_TRAP_GENERIC_NAME_##_id, \ 955 } 956 957static const struct devlink_trap devlink_trap_generic[] = { 958 DEVLINK_TRAP(SMAC_MC, DROP), 959 DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP), 960 DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP), 961 DEVLINK_TRAP(INGRESS_STP_FILTER, DROP), 962 DEVLINK_TRAP(EMPTY_TX_LIST, DROP), 963 DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP), 964 DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP), 965 DEVLINK_TRAP(TTL_ERROR, EXCEPTION), 966 DEVLINK_TRAP(TAIL_DROP, DROP), 967 DEVLINK_TRAP(NON_IP_PACKET, DROP), 968 DEVLINK_TRAP(UC_DIP_MC_DMAC, DROP), 969 DEVLINK_TRAP(DIP_LB, DROP), 970 DEVLINK_TRAP(SIP_MC, DROP), 971 DEVLINK_TRAP(SIP_LB, DROP), 972 DEVLINK_TRAP(CORRUPTED_IP_HDR, DROP), 973 DEVLINK_TRAP(IPV4_SIP_BC, DROP), 974 DEVLINK_TRAP(IPV6_MC_DIP_RESERVED_SCOPE, DROP), 975 DEVLINK_TRAP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, DROP), 976 DEVLINK_TRAP(MTU_ERROR, EXCEPTION), 977 DEVLINK_TRAP(UNRESOLVED_NEIGH, EXCEPTION), 978 DEVLINK_TRAP(RPF, EXCEPTION), 979 DEVLINK_TRAP(REJECT_ROUTE, EXCEPTION), 980 DEVLINK_TRAP(IPV4_LPM_UNICAST_MISS, EXCEPTION), 981 DEVLINK_TRAP(IPV6_LPM_UNICAST_MISS, EXCEPTION), 982 DEVLINK_TRAP(NON_ROUTABLE, DROP), 983 DEVLINK_TRAP(DECAP_ERROR, EXCEPTION), 984 DEVLINK_TRAP(OVERLAY_SMAC_MC, DROP), 985 DEVLINK_TRAP(INGRESS_FLOW_ACTION_DROP, DROP), 986 DEVLINK_TRAP(EGRESS_FLOW_ACTION_DROP, DROP), 987 DEVLINK_TRAP(STP, CONTROL), 988 DEVLINK_TRAP(LACP, CONTROL), 989 DEVLINK_TRAP(LLDP, CONTROL), 990 DEVLINK_TRAP(IGMP_QUERY, CONTROL), 991 DEVLINK_TRAP(IGMP_V1_REPORT, CONTROL), 992 DEVLINK_TRAP(IGMP_V2_REPORT, CONTROL), 993 DEVLINK_TRAP(IGMP_V3_REPORT, CONTROL), 994 DEVLINK_TRAP(IGMP_V2_LEAVE, CONTROL), 995 DEVLINK_TRAP(MLD_QUERY, CONTROL), 996 DEVLINK_TRAP(MLD_V1_REPORT, CONTROL), 997 DEVLINK_TRAP(MLD_V2_REPORT, CONTROL), 998 DEVLINK_TRAP(MLD_V1_DONE, CONTROL), 999 DEVLINK_TRAP(IPV4_DHCP, CONTROL), 1000 DEVLINK_TRAP(IPV6_DHCP, CONTROL), 1001 DEVLINK_TRAP(ARP_REQUEST, CONTROL), 1002 DEVLINK_TRAP(ARP_RESPONSE, CONTROL), 1003 DEVLINK_TRAP(ARP_OVERLAY, CONTROL), 1004 DEVLINK_TRAP(IPV6_NEIGH_SOLICIT, CONTROL), 1005 DEVLINK_TRAP(IPV6_NEIGH_ADVERT, CONTROL), 1006 DEVLINK_TRAP(IPV4_BFD, CONTROL), 1007 DEVLINK_TRAP(IPV6_BFD, CONTROL), 1008 DEVLINK_TRAP(IPV4_OSPF, CONTROL), 1009 DEVLINK_TRAP(IPV6_OSPF, CONTROL), 1010 DEVLINK_TRAP(IPV4_BGP, CONTROL), 1011 DEVLINK_TRAP(IPV6_BGP, CONTROL), 1012 DEVLINK_TRAP(IPV4_VRRP, CONTROL), 1013 DEVLINK_TRAP(IPV6_VRRP, CONTROL), 1014 DEVLINK_TRAP(IPV4_PIM, CONTROL), 1015 DEVLINK_TRAP(IPV6_PIM, CONTROL), 1016 DEVLINK_TRAP(UC_LB, CONTROL), 1017 DEVLINK_TRAP(LOCAL_ROUTE, CONTROL), 1018 DEVLINK_TRAP(EXTERNAL_ROUTE, CONTROL), 1019 DEVLINK_TRAP(IPV6_UC_DIP_LINK_LOCAL_SCOPE, CONTROL), 1020 DEVLINK_TRAP(IPV6_DIP_ALL_NODES, CONTROL), 1021 DEVLINK_TRAP(IPV6_DIP_ALL_ROUTERS, CONTROL), 1022 DEVLINK_TRAP(IPV6_ROUTER_SOLICIT, CONTROL), 1023 DEVLINK_TRAP(IPV6_ROUTER_ADVERT, CONTROL), 1024 DEVLINK_TRAP(IPV6_REDIRECT, CONTROL), 1025 DEVLINK_TRAP(IPV4_ROUTER_ALERT, CONTROL), 1026 DEVLINK_TRAP(IPV6_ROUTER_ALERT, CONTROL), 1027 DEVLINK_TRAP(PTP_EVENT, CONTROL), 1028 DEVLINK_TRAP(PTP_GENERAL, CONTROL), 1029 DEVLINK_TRAP(FLOW_ACTION_SAMPLE, CONTROL), 1030 DEVLINK_TRAP(FLOW_ACTION_TRAP, CONTROL), 1031 DEVLINK_TRAP(EARLY_DROP, DROP), 1032 DEVLINK_TRAP(VXLAN_PARSING, DROP), 1033 DEVLINK_TRAP(LLC_SNAP_PARSING, DROP), 1034 DEVLINK_TRAP(VLAN_PARSING, DROP), 1035 DEVLINK_TRAP(PPPOE_PPP_PARSING, DROP), 1036 DEVLINK_TRAP(MPLS_PARSING, DROP), 1037 DEVLINK_TRAP(ARP_PARSING, DROP), 1038 DEVLINK_TRAP(IP_1_PARSING, DROP), 1039 DEVLINK_TRAP(IP_N_PARSING, DROP), 1040 DEVLINK_TRAP(GRE_PARSING, DROP), 1041 DEVLINK_TRAP(UDP_PARSING, DROP), 1042 DEVLINK_TRAP(TCP_PARSING, DROP), 1043 DEVLINK_TRAP(IPSEC_PARSING, DROP), 1044 DEVLINK_TRAP(SCTP_PARSING, DROP), 1045 DEVLINK_TRAP(DCCP_PARSING, DROP), 1046 DEVLINK_TRAP(GTP_PARSING, DROP), 1047 DEVLINK_TRAP(ESP_PARSING, DROP), 1048 DEVLINK_TRAP(BLACKHOLE_NEXTHOP, DROP), 1049 DEVLINK_TRAP(DMAC_FILTER, DROP), 1050 DEVLINK_TRAP(EAPOL, CONTROL), 1051 DEVLINK_TRAP(LOCKED_PORT, DROP), 1052}; 1053 1054#define DEVLINK_TRAP_GROUP(_id) \ 1055 { \ 1056 .id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id, \ 1057 .name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id, \ 1058 } 1059 1060static const struct devlink_trap_group devlink_trap_group_generic[] = { 1061 DEVLINK_TRAP_GROUP(L2_DROPS), 1062 DEVLINK_TRAP_GROUP(L3_DROPS), 1063 DEVLINK_TRAP_GROUP(L3_EXCEPTIONS), 1064 DEVLINK_TRAP_GROUP(BUFFER_DROPS), 1065 DEVLINK_TRAP_GROUP(TUNNEL_DROPS), 1066 DEVLINK_TRAP_GROUP(ACL_DROPS), 1067 DEVLINK_TRAP_GROUP(STP), 1068 DEVLINK_TRAP_GROUP(LACP), 1069 DEVLINK_TRAP_GROUP(LLDP), 1070 DEVLINK_TRAP_GROUP(MC_SNOOPING), 1071 DEVLINK_TRAP_GROUP(DHCP), 1072 DEVLINK_TRAP_GROUP(NEIGH_DISCOVERY), 1073 DEVLINK_TRAP_GROUP(BFD), 1074 DEVLINK_TRAP_GROUP(OSPF), 1075 DEVLINK_TRAP_GROUP(BGP), 1076 DEVLINK_TRAP_GROUP(VRRP), 1077 DEVLINK_TRAP_GROUP(PIM), 1078 DEVLINK_TRAP_GROUP(UC_LB), 1079 DEVLINK_TRAP_GROUP(LOCAL_DELIVERY), 1080 DEVLINK_TRAP_GROUP(EXTERNAL_DELIVERY), 1081 DEVLINK_TRAP_GROUP(IPV6), 1082 DEVLINK_TRAP_GROUP(PTP_EVENT), 1083 DEVLINK_TRAP_GROUP(PTP_GENERAL), 1084 DEVLINK_TRAP_GROUP(ACL_SAMPLE), 1085 DEVLINK_TRAP_GROUP(ACL_TRAP), 1086 DEVLINK_TRAP_GROUP(PARSER_ERROR_DROPS), 1087 DEVLINK_TRAP_GROUP(EAPOL), 1088}; 1089 1090static int devlink_trap_generic_verify(const struct devlink_trap *trap) 1091{ 1092 if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX) 1093 return -EINVAL; 1094 1095 if (strcmp(trap->name, devlink_trap_generic[trap->id].name)) 1096 return -EINVAL; 1097 1098 if (trap->type != devlink_trap_generic[trap->id].type) 1099 return -EINVAL; 1100 1101 return 0; 1102} 1103 1104static int devlink_trap_driver_verify(const struct devlink_trap *trap) 1105{ 1106 int i; 1107 1108 if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX) 1109 return -EINVAL; 1110 1111 for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) { 1112 if (!strcmp(trap->name, devlink_trap_generic[i].name)) 1113 return -EEXIST; 1114 } 1115 1116 return 0; 1117} 1118 1119static int devlink_trap_verify(const struct devlink_trap *trap) 1120{ 1121 if (!trap || !trap->name) 1122 return -EINVAL; 1123 1124 if (trap->generic) 1125 return devlink_trap_generic_verify(trap); 1126 else 1127 return devlink_trap_driver_verify(trap); 1128} 1129 1130static int 1131devlink_trap_group_generic_verify(const struct devlink_trap_group *group) 1132{ 1133 if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX) 1134 return -EINVAL; 1135 1136 if (strcmp(group->name, devlink_trap_group_generic[group->id].name)) 1137 return -EINVAL; 1138 1139 return 0; 1140} 1141 1142static int 1143devlink_trap_group_driver_verify(const struct devlink_trap_group *group) 1144{ 1145 int i; 1146 1147 if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX) 1148 return -EINVAL; 1149 1150 for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) { 1151 if (!strcmp(group->name, devlink_trap_group_generic[i].name)) 1152 return -EEXIST; 1153 } 1154 1155 return 0; 1156} 1157 1158static int devlink_trap_group_verify(const struct devlink_trap_group *group) 1159{ 1160 if (group->generic) 1161 return devlink_trap_group_generic_verify(group); 1162 else 1163 return devlink_trap_group_driver_verify(group); 1164} 1165 1166static void 1167devlink_trap_group_notify(struct devlink *devlink, 1168 const struct devlink_trap_group_item *group_item, 1169 enum devlink_command cmd) 1170{ 1171 struct sk_buff *msg; 1172 int err; 1173 1174 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW && 1175 cmd != DEVLINK_CMD_TRAP_GROUP_DEL); 1176 1177 if (!devl_is_registered(devlink) || !devlink_nl_notify_need(devlink)) 1178 return; 1179 1180 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1181 if (!msg) 1182 return; 1183 1184 err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0, 1185 0); 1186 if (err) { 1187 nlmsg_free(msg); 1188 return; 1189 } 1190 1191 devlink_nl_notify_send(devlink, msg); 1192} 1193 1194void devlink_trap_groups_notify_register(struct devlink *devlink) 1195{ 1196 struct devlink_trap_group_item *group_item; 1197 1198 list_for_each_entry(group_item, &devlink->trap_group_list, list) 1199 devlink_trap_group_notify(devlink, group_item, 1200 DEVLINK_CMD_TRAP_GROUP_NEW); 1201} 1202 1203void devlink_trap_groups_notify_unregister(struct devlink *devlink) 1204{ 1205 struct devlink_trap_group_item *group_item; 1206 1207 list_for_each_entry_reverse(group_item, &devlink->trap_group_list, list) 1208 devlink_trap_group_notify(devlink, group_item, 1209 DEVLINK_CMD_TRAP_GROUP_DEL); 1210} 1211 1212static int 1213devlink_trap_item_group_link(struct devlink *devlink, 1214 struct devlink_trap_item *trap_item) 1215{ 1216 u16 group_id = trap_item->trap->init_group_id; 1217 struct devlink_trap_group_item *group_item; 1218 1219 group_item = devlink_trap_group_item_lookup_by_id(devlink, group_id); 1220 if (WARN_ON_ONCE(!group_item)) 1221 return -EINVAL; 1222 1223 trap_item->group_item = group_item; 1224 1225 return 0; 1226} 1227 1228static void devlink_trap_notify(struct devlink *devlink, 1229 const struct devlink_trap_item *trap_item, 1230 enum devlink_command cmd) 1231{ 1232 struct sk_buff *msg; 1233 int err; 1234 1235 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW && 1236 cmd != DEVLINK_CMD_TRAP_DEL); 1237 1238 if (!devl_is_registered(devlink) || !devlink_nl_notify_need(devlink)) 1239 return; 1240 1241 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1242 if (!msg) 1243 return; 1244 1245 err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0); 1246 if (err) { 1247 nlmsg_free(msg); 1248 return; 1249 } 1250 1251 devlink_nl_notify_send(devlink, msg); 1252} 1253 1254void devlink_traps_notify_register(struct devlink *devlink) 1255{ 1256 struct devlink_trap_item *trap_item; 1257 1258 list_for_each_entry(trap_item, &devlink->trap_list, list) 1259 devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW); 1260} 1261 1262void devlink_traps_notify_unregister(struct devlink *devlink) 1263{ 1264 struct devlink_trap_item *trap_item; 1265 1266 list_for_each_entry_reverse(trap_item, &devlink->trap_list, list) 1267 devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL); 1268} 1269 1270static int 1271devlink_trap_register(struct devlink *devlink, 1272 const struct devlink_trap *trap, void *priv) 1273{ 1274 struct devlink_trap_item *trap_item; 1275 int err; 1276 1277 if (devlink_trap_item_lookup(devlink, trap->name)) 1278 return -EEXIST; 1279 1280 trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL); 1281 if (!trap_item) 1282 return -ENOMEM; 1283 1284 trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats); 1285 if (!trap_item->stats) { 1286 err = -ENOMEM; 1287 goto err_stats_alloc; 1288 } 1289 1290 trap_item->trap = trap; 1291 trap_item->action = trap->init_action; 1292 trap_item->priv = priv; 1293 1294 err = devlink_trap_item_group_link(devlink, trap_item); 1295 if (err) 1296 goto err_group_link; 1297 1298 err = devlink->ops->trap_init(devlink, trap, trap_item); 1299 if (err) 1300 goto err_trap_init; 1301 1302 list_add_tail(&trap_item->list, &devlink->trap_list); 1303 devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW); 1304 1305 return 0; 1306 1307err_trap_init: 1308err_group_link: 1309 free_percpu(trap_item->stats); 1310err_stats_alloc: 1311 kfree(trap_item); 1312 return err; 1313} 1314 1315static void devlink_trap_unregister(struct devlink *devlink, 1316 const struct devlink_trap *trap) 1317{ 1318 struct devlink_trap_item *trap_item; 1319 1320 trap_item = devlink_trap_item_lookup(devlink, trap->name); 1321 if (WARN_ON_ONCE(!trap_item)) 1322 return; 1323 1324 devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL); 1325 list_del(&trap_item->list); 1326 if (devlink->ops->trap_fini) 1327 devlink->ops->trap_fini(devlink, trap, trap_item); 1328 free_percpu(trap_item->stats); 1329 kfree(trap_item); 1330} 1331 1332static void devlink_trap_disable(struct devlink *devlink, 1333 const struct devlink_trap *trap) 1334{ 1335 struct devlink_trap_item *trap_item; 1336 1337 trap_item = devlink_trap_item_lookup(devlink, trap->name); 1338 if (WARN_ON_ONCE(!trap_item)) 1339 return; 1340 1341 devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP, 1342 NULL); 1343 trap_item->action = DEVLINK_TRAP_ACTION_DROP; 1344} 1345 1346/** 1347 * devl_traps_register - Register packet traps with devlink. 1348 * @devlink: devlink. 1349 * @traps: Packet traps. 1350 * @traps_count: Count of provided packet traps. 1351 * @priv: Driver private information. 1352 * 1353 * Return: Non-zero value on failure. 1354 */ 1355int devl_traps_register(struct devlink *devlink, 1356 const struct devlink_trap *traps, 1357 size_t traps_count, void *priv) 1358{ 1359 int i, err; 1360 1361 if (!devlink->ops->trap_init || !devlink->ops->trap_action_set) 1362 return -EINVAL; 1363 1364 devl_assert_locked(devlink); 1365 for (i = 0; i < traps_count; i++) { 1366 const struct devlink_trap *trap = &traps[i]; 1367 1368 err = devlink_trap_verify(trap); 1369 if (err) 1370 goto err_trap_verify; 1371 1372 err = devlink_trap_register(devlink, trap, priv); 1373 if (err) 1374 goto err_trap_register; 1375 } 1376 1377 return 0; 1378 1379err_trap_register: 1380err_trap_verify: 1381 for (i--; i >= 0; i--) 1382 devlink_trap_unregister(devlink, &traps[i]); 1383 return err; 1384} 1385EXPORT_SYMBOL_GPL(devl_traps_register); 1386 1387/** 1388 * devlink_traps_register - Register packet traps with devlink. 1389 * @devlink: devlink. 1390 * @traps: Packet traps. 1391 * @traps_count: Count of provided packet traps. 1392 * @priv: Driver private information. 1393 * 1394 * Context: Takes and release devlink->lock <mutex>. 1395 * 1396 * Return: Non-zero value on failure. 1397 */ 1398int devlink_traps_register(struct devlink *devlink, 1399 const struct devlink_trap *traps, 1400 size_t traps_count, void *priv) 1401{ 1402 int err; 1403 1404 devl_lock(devlink); 1405 err = devl_traps_register(devlink, traps, traps_count, priv); 1406 devl_unlock(devlink); 1407 return err; 1408} 1409EXPORT_SYMBOL_GPL(devlink_traps_register); 1410 1411/** 1412 * devl_traps_unregister - Unregister packet traps from devlink. 1413 * @devlink: devlink. 1414 * @traps: Packet traps. 1415 * @traps_count: Count of provided packet traps. 1416 */ 1417void devl_traps_unregister(struct devlink *devlink, 1418 const struct devlink_trap *traps, 1419 size_t traps_count) 1420{ 1421 int i; 1422 1423 devl_assert_locked(devlink); 1424 /* Make sure we do not have any packets in-flight while unregistering 1425 * traps by disabling all of them and waiting for a grace period. 1426 */ 1427 for (i = traps_count - 1; i >= 0; i--) 1428 devlink_trap_disable(devlink, &traps[i]); 1429 synchronize_rcu(); 1430 for (i = traps_count - 1; i >= 0; i--) 1431 devlink_trap_unregister(devlink, &traps[i]); 1432} 1433EXPORT_SYMBOL_GPL(devl_traps_unregister); 1434 1435/** 1436 * devlink_traps_unregister - Unregister packet traps from devlink. 1437 * @devlink: devlink. 1438 * @traps: Packet traps. 1439 * @traps_count: Count of provided packet traps. 1440 * 1441 * Context: Takes and release devlink->lock <mutex>. 1442 */ 1443void devlink_traps_unregister(struct devlink *devlink, 1444 const struct devlink_trap *traps, 1445 size_t traps_count) 1446{ 1447 devl_lock(devlink); 1448 devl_traps_unregister(devlink, traps, traps_count); 1449 devl_unlock(devlink); 1450} 1451EXPORT_SYMBOL_GPL(devlink_traps_unregister); 1452 1453static void 1454devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats, 1455 size_t skb_len) 1456{ 1457 struct devlink_stats *stats; 1458 1459 stats = this_cpu_ptr(trap_stats); 1460 u64_stats_update_begin(&stats->syncp); 1461 u64_stats_add(&stats->rx_bytes, skb_len); 1462 u64_stats_inc(&stats->rx_packets); 1463 u64_stats_update_end(&stats->syncp); 1464} 1465 1466static void 1467devlink_trap_report_metadata_set(struct devlink_trap_metadata *metadata, 1468 const struct devlink_trap_item *trap_item, 1469 struct devlink_port *in_devlink_port, 1470 const struct flow_action_cookie *fa_cookie) 1471{ 1472 metadata->trap_name = trap_item->trap->name; 1473 metadata->trap_group_name = trap_item->group_item->group->name; 1474 metadata->fa_cookie = fa_cookie; 1475 metadata->trap_type = trap_item->trap->type; 1476 1477 spin_lock(&in_devlink_port->type_lock); 1478 if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH) 1479 metadata->input_dev = in_devlink_port->type_eth.netdev; 1480 spin_unlock(&in_devlink_port->type_lock); 1481} 1482 1483/** 1484 * devlink_trap_report - Report trapped packet to drop monitor. 1485 * @devlink: devlink. 1486 * @skb: Trapped packet. 1487 * @trap_ctx: Trap context. 1488 * @in_devlink_port: Input devlink port. 1489 * @fa_cookie: Flow action cookie. Could be NULL. 1490 */ 1491void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb, 1492 void *trap_ctx, struct devlink_port *in_devlink_port, 1493 const struct flow_action_cookie *fa_cookie) 1494 1495{ 1496 struct devlink_trap_item *trap_item = trap_ctx; 1497 1498 devlink_trap_stats_update(trap_item->stats, skb->len); 1499 devlink_trap_stats_update(trap_item->group_item->stats, skb->len); 1500 1501 if (tracepoint_enabled(devlink_trap_report)) { 1502 struct devlink_trap_metadata metadata = {}; 1503 1504 devlink_trap_report_metadata_set(&metadata, trap_item, 1505 in_devlink_port, fa_cookie); 1506 trace_devlink_trap_report(devlink, skb, &metadata); 1507 } 1508} 1509EXPORT_SYMBOL_GPL(devlink_trap_report); 1510 1511/** 1512 * devlink_trap_ctx_priv - Trap context to driver private information. 1513 * @trap_ctx: Trap context. 1514 * 1515 * Return: Driver private information passed during registration. 1516 */ 1517void *devlink_trap_ctx_priv(void *trap_ctx) 1518{ 1519 struct devlink_trap_item *trap_item = trap_ctx; 1520 1521 return trap_item->priv; 1522} 1523EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv); 1524 1525static int 1526devlink_trap_group_item_policer_link(struct devlink *devlink, 1527 struct devlink_trap_group_item *group_item) 1528{ 1529 u32 policer_id = group_item->group->init_policer_id; 1530 struct devlink_trap_policer_item *policer_item; 1531 1532 if (policer_id == 0) 1533 return 0; 1534 1535 policer_item = devlink_trap_policer_item_lookup(devlink, policer_id); 1536 if (WARN_ON_ONCE(!policer_item)) 1537 return -EINVAL; 1538 1539 group_item->policer_item = policer_item; 1540 1541 return 0; 1542} 1543 1544static int 1545devlink_trap_group_register(struct devlink *devlink, 1546 const struct devlink_trap_group *group) 1547{ 1548 struct devlink_trap_group_item *group_item; 1549 int err; 1550 1551 if (devlink_trap_group_item_lookup(devlink, group->name)) 1552 return -EEXIST; 1553 1554 group_item = kzalloc(sizeof(*group_item), GFP_KERNEL); 1555 if (!group_item) 1556 return -ENOMEM; 1557 1558 group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats); 1559 if (!group_item->stats) { 1560 err = -ENOMEM; 1561 goto err_stats_alloc; 1562 } 1563 1564 group_item->group = group; 1565 1566 err = devlink_trap_group_item_policer_link(devlink, group_item); 1567 if (err) 1568 goto err_policer_link; 1569 1570 if (devlink->ops->trap_group_init) { 1571 err = devlink->ops->trap_group_init(devlink, group); 1572 if (err) 1573 goto err_group_init; 1574 } 1575 1576 list_add_tail(&group_item->list, &devlink->trap_group_list); 1577 devlink_trap_group_notify(devlink, group_item, 1578 DEVLINK_CMD_TRAP_GROUP_NEW); 1579 1580 return 0; 1581 1582err_group_init: 1583err_policer_link: 1584 free_percpu(group_item->stats); 1585err_stats_alloc: 1586 kfree(group_item); 1587 return err; 1588} 1589 1590static void 1591devlink_trap_group_unregister(struct devlink *devlink, 1592 const struct devlink_trap_group *group) 1593{ 1594 struct devlink_trap_group_item *group_item; 1595 1596 group_item = devlink_trap_group_item_lookup(devlink, group->name); 1597 if (WARN_ON_ONCE(!group_item)) 1598 return; 1599 1600 devlink_trap_group_notify(devlink, group_item, 1601 DEVLINK_CMD_TRAP_GROUP_DEL); 1602 list_del(&group_item->list); 1603 free_percpu(group_item->stats); 1604 kfree(group_item); 1605} 1606 1607/** 1608 * devl_trap_groups_register - Register packet trap groups with devlink. 1609 * @devlink: devlink. 1610 * @groups: Packet trap groups. 1611 * @groups_count: Count of provided packet trap groups. 1612 * 1613 * Return: Non-zero value on failure. 1614 */ 1615int devl_trap_groups_register(struct devlink *devlink, 1616 const struct devlink_trap_group *groups, 1617 size_t groups_count) 1618{ 1619 int i, err; 1620 1621 devl_assert_locked(devlink); 1622 for (i = 0; i < groups_count; i++) { 1623 const struct devlink_trap_group *group = &groups[i]; 1624 1625 err = devlink_trap_group_verify(group); 1626 if (err) 1627 goto err_trap_group_verify; 1628 1629 err = devlink_trap_group_register(devlink, group); 1630 if (err) 1631 goto err_trap_group_register; 1632 } 1633 1634 return 0; 1635 1636err_trap_group_register: 1637err_trap_group_verify: 1638 for (i--; i >= 0; i--) 1639 devlink_trap_group_unregister(devlink, &groups[i]); 1640 return err; 1641} 1642EXPORT_SYMBOL_GPL(devl_trap_groups_register); 1643 1644/** 1645 * devlink_trap_groups_register - Register packet trap groups with devlink. 1646 * @devlink: devlink. 1647 * @groups: Packet trap groups. 1648 * @groups_count: Count of provided packet trap groups. 1649 * 1650 * Context: Takes and release devlink->lock <mutex>. 1651 * 1652 * Return: Non-zero value on failure. 1653 */ 1654int devlink_trap_groups_register(struct devlink *devlink, 1655 const struct devlink_trap_group *groups, 1656 size_t groups_count) 1657{ 1658 int err; 1659 1660 devl_lock(devlink); 1661 err = devl_trap_groups_register(devlink, groups, groups_count); 1662 devl_unlock(devlink); 1663 return err; 1664} 1665EXPORT_SYMBOL_GPL(devlink_trap_groups_register); 1666 1667/** 1668 * devl_trap_groups_unregister - Unregister packet trap groups from devlink. 1669 * @devlink: devlink. 1670 * @groups: Packet trap groups. 1671 * @groups_count: Count of provided packet trap groups. 1672 */ 1673void devl_trap_groups_unregister(struct devlink *devlink, 1674 const struct devlink_trap_group *groups, 1675 size_t groups_count) 1676{ 1677 int i; 1678 1679 devl_assert_locked(devlink); 1680 for (i = groups_count - 1; i >= 0; i--) 1681 devlink_trap_group_unregister(devlink, &groups[i]); 1682} 1683EXPORT_SYMBOL_GPL(devl_trap_groups_unregister); 1684 1685/** 1686 * devlink_trap_groups_unregister - Unregister packet trap groups from devlink. 1687 * @devlink: devlink. 1688 * @groups: Packet trap groups. 1689 * @groups_count: Count of provided packet trap groups. 1690 * 1691 * Context: Takes and release devlink->lock <mutex>. 1692 */ 1693void devlink_trap_groups_unregister(struct devlink *devlink, 1694 const struct devlink_trap_group *groups, 1695 size_t groups_count) 1696{ 1697 devl_lock(devlink); 1698 devl_trap_groups_unregister(devlink, groups, groups_count); 1699 devl_unlock(devlink); 1700} 1701EXPORT_SYMBOL_GPL(devlink_trap_groups_unregister); 1702 1703static void 1704devlink_trap_policer_notify(struct devlink *devlink, 1705 const struct devlink_trap_policer_item *policer_item, 1706 enum devlink_command cmd) 1707{ 1708 struct sk_buff *msg; 1709 int err; 1710 1711 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_POLICER_NEW && 1712 cmd != DEVLINK_CMD_TRAP_POLICER_DEL); 1713 1714 if (!devl_is_registered(devlink) || !devlink_nl_notify_need(devlink)) 1715 return; 1716 1717 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1718 if (!msg) 1719 return; 1720 1721 err = devlink_nl_trap_policer_fill(msg, devlink, policer_item, cmd, 0, 1722 0, 0); 1723 if (err) { 1724 nlmsg_free(msg); 1725 return; 1726 } 1727 1728 devlink_nl_notify_send(devlink, msg); 1729} 1730 1731void devlink_trap_policers_notify_register(struct devlink *devlink) 1732{ 1733 struct devlink_trap_policer_item *policer_item; 1734 1735 list_for_each_entry(policer_item, &devlink->trap_policer_list, list) 1736 devlink_trap_policer_notify(devlink, policer_item, 1737 DEVLINK_CMD_TRAP_POLICER_NEW); 1738} 1739 1740void devlink_trap_policers_notify_unregister(struct devlink *devlink) 1741{ 1742 struct devlink_trap_policer_item *policer_item; 1743 1744 list_for_each_entry_reverse(policer_item, &devlink->trap_policer_list, 1745 list) 1746 devlink_trap_policer_notify(devlink, policer_item, 1747 DEVLINK_CMD_TRAP_POLICER_DEL); 1748} 1749 1750static int 1751devlink_trap_policer_register(struct devlink *devlink, 1752 const struct devlink_trap_policer *policer) 1753{ 1754 struct devlink_trap_policer_item *policer_item; 1755 int err; 1756 1757 if (devlink_trap_policer_item_lookup(devlink, policer->id)) 1758 return -EEXIST; 1759 1760 policer_item = kzalloc(sizeof(*policer_item), GFP_KERNEL); 1761 if (!policer_item) 1762 return -ENOMEM; 1763 1764 policer_item->policer = policer; 1765 policer_item->rate = policer->init_rate; 1766 policer_item->burst = policer->init_burst; 1767 1768 if (devlink->ops->trap_policer_init) { 1769 err = devlink->ops->trap_policer_init(devlink, policer); 1770 if (err) 1771 goto err_policer_init; 1772 } 1773 1774 list_add_tail(&policer_item->list, &devlink->trap_policer_list); 1775 devlink_trap_policer_notify(devlink, policer_item, 1776 DEVLINK_CMD_TRAP_POLICER_NEW); 1777 1778 return 0; 1779 1780err_policer_init: 1781 kfree(policer_item); 1782 return err; 1783} 1784 1785static void 1786devlink_trap_policer_unregister(struct devlink *devlink, 1787 const struct devlink_trap_policer *policer) 1788{ 1789 struct devlink_trap_policer_item *policer_item; 1790 1791 policer_item = devlink_trap_policer_item_lookup(devlink, policer->id); 1792 if (WARN_ON_ONCE(!policer_item)) 1793 return; 1794 1795 devlink_trap_policer_notify(devlink, policer_item, 1796 DEVLINK_CMD_TRAP_POLICER_DEL); 1797 list_del(&policer_item->list); 1798 if (devlink->ops->trap_policer_fini) 1799 devlink->ops->trap_policer_fini(devlink, policer); 1800 kfree(policer_item); 1801} 1802 1803/** 1804 * devl_trap_policers_register - Register packet trap policers with devlink. 1805 * @devlink: devlink. 1806 * @policers: Packet trap policers. 1807 * @policers_count: Count of provided packet trap policers. 1808 * 1809 * Return: Non-zero value on failure. 1810 */ 1811int 1812devl_trap_policers_register(struct devlink *devlink, 1813 const struct devlink_trap_policer *policers, 1814 size_t policers_count) 1815{ 1816 int i, err; 1817 1818 devl_assert_locked(devlink); 1819 for (i = 0; i < policers_count; i++) { 1820 const struct devlink_trap_policer *policer = &policers[i]; 1821 1822 if (WARN_ON(policer->id == 0 || 1823 policer->max_rate < policer->min_rate || 1824 policer->max_burst < policer->min_burst)) { 1825 err = -EINVAL; 1826 goto err_trap_policer_verify; 1827 } 1828 1829 err = devlink_trap_policer_register(devlink, policer); 1830 if (err) 1831 goto err_trap_policer_register; 1832 } 1833 return 0; 1834 1835err_trap_policer_register: 1836err_trap_policer_verify: 1837 for (i--; i >= 0; i--) 1838 devlink_trap_policer_unregister(devlink, &policers[i]); 1839 return err; 1840} 1841EXPORT_SYMBOL_GPL(devl_trap_policers_register); 1842 1843/** 1844 * devl_trap_policers_unregister - Unregister packet trap policers from devlink. 1845 * @devlink: devlink. 1846 * @policers: Packet trap policers. 1847 * @policers_count: Count of provided packet trap policers. 1848 */ 1849void 1850devl_trap_policers_unregister(struct devlink *devlink, 1851 const struct devlink_trap_policer *policers, 1852 size_t policers_count) 1853{ 1854 int i; 1855 1856 devl_assert_locked(devlink); 1857 for (i = policers_count - 1; i >= 0; i--) 1858 devlink_trap_policer_unregister(devlink, &policers[i]); 1859} 1860EXPORT_SYMBOL_GPL(devl_trap_policers_unregister); 1861