1/* 2 * Copyright (c) 2015, Mellanox Technologies inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33#include "core_priv.h" 34 35#include <linux/in.h> 36#include <linux/in6.h> 37 38/* For in6_dev_get/in6_dev_put */ 39#include <net/addrconf.h> 40#include <net/bonding.h> 41 42#include <rdma/ib_cache.h> 43#include <rdma/ib_addr.h> 44 45static struct workqueue_struct *gid_cache_wq; 46 47enum gid_op_type { 48 GID_DEL = 0, 49 GID_ADD 50}; 51 52struct update_gid_event_work { 53 struct work_struct work; 54 union ib_gid gid; 55 struct ib_gid_attr gid_attr; 56 enum gid_op_type gid_op; 57}; 58 59#define ROCE_NETDEV_CALLBACK_SZ 3 60struct netdev_event_work_cmd { 61 roce_netdev_callback cb; 62 roce_netdev_filter filter; 63 struct net_device *ndev; 64 struct net_device *filter_ndev; 65}; 66 67struct netdev_event_work { 68 struct work_struct work; 69 struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ]; 70}; 71 72static const struct { 73 bool (*is_supported)(const struct ib_device *device, u32 port_num); 74 enum ib_gid_type gid_type; 75} PORT_CAP_TO_GID_TYPE[] = { 76 {rdma_protocol_roce_eth_encap, IB_GID_TYPE_ROCE}, 77 {rdma_protocol_roce_udp_encap, IB_GID_TYPE_ROCE_UDP_ENCAP}, 78}; 79 80#define CAP_TO_GID_TABLE_SIZE ARRAY_SIZE(PORT_CAP_TO_GID_TYPE) 81 82unsigned long roce_gid_type_mask_support(struct ib_device *ib_dev, u32 port) 83{ 84 int i; 85 unsigned int ret_flags = 0; 86 87 if (!rdma_protocol_roce(ib_dev, port)) 88 return 1UL << IB_GID_TYPE_IB; 89 90 for (i = 0; i < CAP_TO_GID_TABLE_SIZE; i++) 91 if (PORT_CAP_TO_GID_TYPE[i].is_supported(ib_dev, port)) 92 ret_flags |= 1UL << PORT_CAP_TO_GID_TYPE[i].gid_type; 93 94 return ret_flags; 95} 96EXPORT_SYMBOL(roce_gid_type_mask_support); 97 98static void update_gid(enum gid_op_type gid_op, struct ib_device *ib_dev, 99 u32 port, union ib_gid *gid, 100 struct ib_gid_attr *gid_attr) 101{ 102 int i; 103 unsigned long gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 104 105 for (i = 0; i < IB_GID_TYPE_SIZE; i++) { 106 if ((1UL << i) & gid_type_mask) { 107 gid_attr->gid_type = i; 108 switch (gid_op) { 109 case GID_ADD: 110 ib_cache_gid_add(ib_dev, port, 111 gid, gid_attr); 112 break; 113 case GID_DEL: 114 ib_cache_gid_del(ib_dev, port, 115 gid, gid_attr); 116 break; 117 } 118 } 119 } 120} 121 122enum bonding_slave_state { 123 BONDING_SLAVE_STATE_ACTIVE = 1UL << 0, 124 BONDING_SLAVE_STATE_INACTIVE = 1UL << 1, 125 /* No primary slave or the device isn't a slave in bonding */ 126 BONDING_SLAVE_STATE_NA = 1UL << 2, 127}; 128 129static enum bonding_slave_state is_eth_active_slave_of_bonding_rcu(struct net_device *dev, 130 struct net_device *upper) 131{ 132 if (upper && netif_is_bond_master(upper)) { 133 struct net_device *pdev = 134 bond_option_active_slave_get_rcu(netdev_priv(upper)); 135 136 if (pdev) 137 return dev == pdev ? BONDING_SLAVE_STATE_ACTIVE : 138 BONDING_SLAVE_STATE_INACTIVE; 139 } 140 141 return BONDING_SLAVE_STATE_NA; 142} 143 144#define REQUIRED_BOND_STATES (BONDING_SLAVE_STATE_ACTIVE | \ 145 BONDING_SLAVE_STATE_NA) 146static bool 147is_eth_port_of_netdev_filter(struct ib_device *ib_dev, u32 port, 148 struct net_device *rdma_ndev, void *cookie) 149{ 150 struct net_device *real_dev; 151 bool res; 152 153 if (!rdma_ndev) 154 return false; 155 156 rcu_read_lock(); 157 real_dev = rdma_vlan_dev_real_dev(cookie); 158 if (!real_dev) 159 real_dev = cookie; 160 161 res = ((rdma_is_upper_dev_rcu(rdma_ndev, cookie) && 162 (is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) & 163 REQUIRED_BOND_STATES)) || 164 real_dev == rdma_ndev); 165 166 rcu_read_unlock(); 167 return res; 168} 169 170static bool 171is_eth_port_inactive_slave_filter(struct ib_device *ib_dev, u32 port, 172 struct net_device *rdma_ndev, void *cookie) 173{ 174 struct net_device *master_dev; 175 bool res; 176 177 if (!rdma_ndev) 178 return false; 179 180 rcu_read_lock(); 181 master_dev = netdev_master_upper_dev_get_rcu(rdma_ndev); 182 res = is_eth_active_slave_of_bonding_rcu(rdma_ndev, master_dev) == 183 BONDING_SLAVE_STATE_INACTIVE; 184 rcu_read_unlock(); 185 186 return res; 187} 188 189/** 190 * is_ndev_for_default_gid_filter - Check if a given netdevice 191 * can be considered for default GIDs or not. 192 * @ib_dev: IB device to check 193 * @port: Port to consider for adding default GID 194 * @rdma_ndev: rdma netdevice pointer 195 * @cookie: Netdevice to consider to form a default GID 196 * 197 * is_ndev_for_default_gid_filter() returns true if a given netdevice can be 198 * considered for deriving default RoCE GID, returns false otherwise. 199 */ 200static bool 201is_ndev_for_default_gid_filter(struct ib_device *ib_dev, u32 port, 202 struct net_device *rdma_ndev, void *cookie) 203{ 204 struct net_device *cookie_ndev = cookie; 205 bool res; 206 207 if (!rdma_ndev) 208 return false; 209 210 rcu_read_lock(); 211 212 /* 213 * When rdma netdevice is used in bonding, bonding master netdevice 214 * should be considered for default GIDs. Therefore, ignore slave rdma 215 * netdevices when bonding is considered. 216 * Additionally when event(cookie) netdevice is bond master device, 217 * make sure that it the upper netdevice of rdma netdevice. 218 */ 219 res = ((cookie_ndev == rdma_ndev && !netif_is_bond_slave(rdma_ndev)) || 220 (netif_is_bond_master(cookie_ndev) && 221 rdma_is_upper_dev_rcu(rdma_ndev, cookie_ndev))); 222 223 rcu_read_unlock(); 224 return res; 225} 226 227static bool pass_all_filter(struct ib_device *ib_dev, u32 port, 228 struct net_device *rdma_ndev, void *cookie) 229{ 230 return true; 231} 232 233static bool upper_device_filter(struct ib_device *ib_dev, u32 port, 234 struct net_device *rdma_ndev, void *cookie) 235{ 236 bool res; 237 238 if (!rdma_ndev) 239 return false; 240 241 if (rdma_ndev == cookie) 242 return true; 243 244 rcu_read_lock(); 245 res = rdma_is_upper_dev_rcu(rdma_ndev, cookie); 246 rcu_read_unlock(); 247 248 return res; 249} 250 251/** 252 * is_upper_ndev_bond_master_filter - Check if a given netdevice 253 * is bond master device of netdevice of the RDMA device of port. 254 * @ib_dev: IB device to check 255 * @port: Port to consider for adding default GID 256 * @rdma_ndev: Pointer to rdma netdevice 257 * @cookie: Netdevice to consider to form a default GID 258 * 259 * is_upper_ndev_bond_master_filter() returns true if a cookie_netdev 260 * is bond master device and rdma_ndev is its lower netdevice. It might 261 * not have been established as slave device yet. 262 */ 263static bool 264is_upper_ndev_bond_master_filter(struct ib_device *ib_dev, u32 port, 265 struct net_device *rdma_ndev, 266 void *cookie) 267{ 268 struct net_device *cookie_ndev = cookie; 269 bool match = false; 270 271 if (!rdma_ndev) 272 return false; 273 274 rcu_read_lock(); 275 if (netif_is_bond_master(cookie_ndev) && 276 rdma_is_upper_dev_rcu(rdma_ndev, cookie_ndev)) 277 match = true; 278 rcu_read_unlock(); 279 return match; 280} 281 282static void update_gid_ip(enum gid_op_type gid_op, 283 struct ib_device *ib_dev, 284 u32 port, struct net_device *ndev, 285 struct sockaddr *addr) 286{ 287 union ib_gid gid; 288 struct ib_gid_attr gid_attr; 289 290 rdma_ip2gid(addr, &gid); 291 memset(&gid_attr, 0, sizeof(gid_attr)); 292 gid_attr.ndev = ndev; 293 294 update_gid(gid_op, ib_dev, port, &gid, &gid_attr); 295} 296 297static void bond_delete_netdev_default_gids(struct ib_device *ib_dev, 298 u32 port, 299 struct net_device *rdma_ndev, 300 struct net_device *event_ndev) 301{ 302 struct net_device *real_dev = rdma_vlan_dev_real_dev(event_ndev); 303 unsigned long gid_type_mask; 304 305 if (!rdma_ndev) 306 return; 307 308 if (!real_dev) 309 real_dev = event_ndev; 310 311 rcu_read_lock(); 312 313 if (((rdma_ndev != event_ndev && 314 !rdma_is_upper_dev_rcu(rdma_ndev, event_ndev)) || 315 is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) 316 == 317 BONDING_SLAVE_STATE_INACTIVE)) { 318 rcu_read_unlock(); 319 return; 320 } 321 322 rcu_read_unlock(); 323 324 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 325 326 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, 327 gid_type_mask, 328 IB_CACHE_GID_DEFAULT_MODE_DELETE); 329} 330 331static void enum_netdev_ipv4_ips(struct ib_device *ib_dev, 332 u32 port, struct net_device *ndev) 333{ 334 const struct in_ifaddr *ifa; 335 struct in_device *in_dev; 336 struct sin_list { 337 struct list_head list; 338 struct sockaddr_in ip; 339 }; 340 struct sin_list *sin_iter; 341 struct sin_list *sin_temp; 342 343 LIST_HEAD(sin_list); 344 if (ndev->reg_state >= NETREG_UNREGISTERING) 345 return; 346 347 rcu_read_lock(); 348 in_dev = __in_dev_get_rcu(ndev); 349 if (!in_dev) { 350 rcu_read_unlock(); 351 return; 352 } 353 354 in_dev_for_each_ifa_rcu(ifa, in_dev) { 355 struct sin_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC); 356 357 if (!entry) 358 continue; 359 360 entry->ip.sin_family = AF_INET; 361 entry->ip.sin_addr.s_addr = ifa->ifa_address; 362 list_add_tail(&entry->list, &sin_list); 363 } 364 365 rcu_read_unlock(); 366 367 list_for_each_entry_safe(sin_iter, sin_temp, &sin_list, list) { 368 update_gid_ip(GID_ADD, ib_dev, port, ndev, 369 (struct sockaddr *)&sin_iter->ip); 370 list_del(&sin_iter->list); 371 kfree(sin_iter); 372 } 373} 374 375static void enum_netdev_ipv6_ips(struct ib_device *ib_dev, 376 u32 port, struct net_device *ndev) 377{ 378 struct inet6_ifaddr *ifp; 379 struct inet6_dev *in6_dev; 380 struct sin6_list { 381 struct list_head list; 382 struct sockaddr_in6 sin6; 383 }; 384 struct sin6_list *sin6_iter; 385 struct sin6_list *sin6_temp; 386 struct ib_gid_attr gid_attr = {.ndev = ndev}; 387 LIST_HEAD(sin6_list); 388 389 if (ndev->reg_state >= NETREG_UNREGISTERING) 390 return; 391 392 in6_dev = in6_dev_get(ndev); 393 if (!in6_dev) 394 return; 395 396 read_lock_bh(&in6_dev->lock); 397 list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { 398 struct sin6_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC); 399 400 if (!entry) 401 continue; 402 403 entry->sin6.sin6_family = AF_INET6; 404 entry->sin6.sin6_addr = ifp->addr; 405 list_add_tail(&entry->list, &sin6_list); 406 } 407 read_unlock_bh(&in6_dev->lock); 408 409 in6_dev_put(in6_dev); 410 411 list_for_each_entry_safe(sin6_iter, sin6_temp, &sin6_list, list) { 412 union ib_gid gid; 413 414 rdma_ip2gid((struct sockaddr *)&sin6_iter->sin6, &gid); 415 update_gid(GID_ADD, ib_dev, port, &gid, &gid_attr); 416 list_del(&sin6_iter->list); 417 kfree(sin6_iter); 418 } 419} 420 421static void _add_netdev_ips(struct ib_device *ib_dev, u32 port, 422 struct net_device *ndev) 423{ 424 enum_netdev_ipv4_ips(ib_dev, port, ndev); 425 if (IS_ENABLED(CONFIG_IPV6)) 426 enum_netdev_ipv6_ips(ib_dev, port, ndev); 427} 428 429static void add_netdev_ips(struct ib_device *ib_dev, u32 port, 430 struct net_device *rdma_ndev, void *cookie) 431{ 432 _add_netdev_ips(ib_dev, port, cookie); 433} 434 435static void del_netdev_ips(struct ib_device *ib_dev, u32 port, 436 struct net_device *rdma_ndev, void *cookie) 437{ 438 ib_cache_gid_del_all_netdev_gids(ib_dev, port, cookie); 439} 440 441/** 442 * del_default_gids - Delete default GIDs of the event/cookie netdevice 443 * @ib_dev: RDMA device pointer 444 * @port: Port of the RDMA device whose GID table to consider 445 * @rdma_ndev: Unused rdma netdevice 446 * @cookie: Pointer to event netdevice 447 * 448 * del_default_gids() deletes the default GIDs of the event/cookie netdevice. 449 */ 450static void del_default_gids(struct ib_device *ib_dev, u32 port, 451 struct net_device *rdma_ndev, void *cookie) 452{ 453 struct net_device *cookie_ndev = cookie; 454 unsigned long gid_type_mask; 455 456 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 457 458 ib_cache_gid_set_default_gid(ib_dev, port, cookie_ndev, gid_type_mask, 459 IB_CACHE_GID_DEFAULT_MODE_DELETE); 460} 461 462static void add_default_gids(struct ib_device *ib_dev, u32 port, 463 struct net_device *rdma_ndev, void *cookie) 464{ 465 struct net_device *event_ndev = cookie; 466 unsigned long gid_type_mask; 467 468 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 469 ib_cache_gid_set_default_gid(ib_dev, port, event_ndev, gid_type_mask, 470 IB_CACHE_GID_DEFAULT_MODE_SET); 471} 472 473static void enum_all_gids_of_dev_cb(struct ib_device *ib_dev, 474 u32 port, 475 struct net_device *rdma_ndev, 476 void *cookie) 477{ 478 struct net *net; 479 struct net_device *ndev; 480 481 /* Lock the rtnl to make sure the netdevs does not move under 482 * our feet 483 */ 484 rtnl_lock(); 485 down_read(&net_rwsem); 486 for_each_net(net) 487 for_each_netdev(net, ndev) { 488 /* 489 * Filter and add default GIDs of the primary netdevice 490 * when not in bonding mode, or add default GIDs 491 * of bond master device, when in bonding mode. 492 */ 493 if (is_ndev_for_default_gid_filter(ib_dev, port, 494 rdma_ndev, ndev)) 495 add_default_gids(ib_dev, port, rdma_ndev, ndev); 496 497 if (is_eth_port_of_netdev_filter(ib_dev, port, 498 rdma_ndev, ndev)) 499 _add_netdev_ips(ib_dev, port, ndev); 500 } 501 up_read(&net_rwsem); 502 rtnl_unlock(); 503} 504 505/** 506 * rdma_roce_rescan_device - Rescan all of the network devices in the system 507 * and add their gids, as needed, to the relevant RoCE devices. 508 * 509 * @ib_dev: the rdma device 510 */ 511void rdma_roce_rescan_device(struct ib_device *ib_dev) 512{ 513 ib_enum_roce_netdev(ib_dev, pass_all_filter, NULL, 514 enum_all_gids_of_dev_cb, NULL); 515} 516EXPORT_SYMBOL(rdma_roce_rescan_device); 517 518static void callback_for_addr_gid_device_scan(struct ib_device *device, 519 u32 port, 520 struct net_device *rdma_ndev, 521 void *cookie) 522{ 523 struct update_gid_event_work *parsed = cookie; 524 525 return update_gid(parsed->gid_op, device, 526 port, &parsed->gid, 527 &parsed->gid_attr); 528} 529 530struct upper_list { 531 struct list_head list; 532 struct net_device *upper; 533}; 534 535static int netdev_upper_walk(struct net_device *upper, 536 struct netdev_nested_priv *priv) 537{ 538 struct upper_list *entry = kmalloc(sizeof(*entry), GFP_ATOMIC); 539 struct list_head *upper_list = (struct list_head *)priv->data; 540 541 if (!entry) 542 return 0; 543 544 list_add_tail(&entry->list, upper_list); 545 dev_hold(upper); 546 entry->upper = upper; 547 548 return 0; 549} 550 551static void handle_netdev_upper(struct ib_device *ib_dev, u32 port, 552 void *cookie, 553 void (*handle_netdev)(struct ib_device *ib_dev, 554 u32 port, 555 struct net_device *ndev)) 556{ 557 struct net_device *ndev = cookie; 558 struct netdev_nested_priv priv; 559 struct upper_list *upper_iter; 560 struct upper_list *upper_temp; 561 LIST_HEAD(upper_list); 562 563 priv.data = &upper_list; 564 rcu_read_lock(); 565 netdev_walk_all_upper_dev_rcu(ndev, netdev_upper_walk, &priv); 566 rcu_read_unlock(); 567 568 handle_netdev(ib_dev, port, ndev); 569 list_for_each_entry_safe(upper_iter, upper_temp, &upper_list, 570 list) { 571 handle_netdev(ib_dev, port, upper_iter->upper); 572 dev_put(upper_iter->upper); 573 list_del(&upper_iter->list); 574 kfree(upper_iter); 575 } 576} 577 578static void _roce_del_all_netdev_gids(struct ib_device *ib_dev, u32 port, 579 struct net_device *event_ndev) 580{ 581 ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev); 582} 583 584static void del_netdev_upper_ips(struct ib_device *ib_dev, u32 port, 585 struct net_device *rdma_ndev, void *cookie) 586{ 587 handle_netdev_upper(ib_dev, port, cookie, _roce_del_all_netdev_gids); 588} 589 590static void add_netdev_upper_ips(struct ib_device *ib_dev, u32 port, 591 struct net_device *rdma_ndev, void *cookie) 592{ 593 handle_netdev_upper(ib_dev, port, cookie, _add_netdev_ips); 594} 595 596static void del_netdev_default_ips_join(struct ib_device *ib_dev, u32 port, 597 struct net_device *rdma_ndev, 598 void *cookie) 599{ 600 struct net_device *master_ndev; 601 602 rcu_read_lock(); 603 master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev); 604 if (master_ndev) 605 dev_hold(master_ndev); 606 rcu_read_unlock(); 607 608 if (master_ndev) { 609 bond_delete_netdev_default_gids(ib_dev, port, rdma_ndev, 610 master_ndev); 611 dev_put(master_ndev); 612 } 613} 614 615/* The following functions operate on all IB devices. netdevice_event and 616 * addr_event execute ib_enum_all_roce_netdevs through a work. 617 * ib_enum_all_roce_netdevs iterates through all IB devices. 618 */ 619 620static void netdevice_event_work_handler(struct work_struct *_work) 621{ 622 struct netdev_event_work *work = 623 container_of(_work, struct netdev_event_work, work); 624 unsigned int i; 625 626 for (i = 0; i < ARRAY_SIZE(work->cmds) && work->cmds[i].cb; i++) { 627 ib_enum_all_roce_netdevs(work->cmds[i].filter, 628 work->cmds[i].filter_ndev, 629 work->cmds[i].cb, 630 work->cmds[i].ndev); 631 dev_put(work->cmds[i].ndev); 632 dev_put(work->cmds[i].filter_ndev); 633 } 634 635 kfree(work); 636} 637 638static int netdevice_queue_work(struct netdev_event_work_cmd *cmds, 639 struct net_device *ndev) 640{ 641 unsigned int i; 642 struct netdev_event_work *ndev_work = 643 kmalloc(sizeof(*ndev_work), GFP_KERNEL); 644 645 if (!ndev_work) 646 return NOTIFY_DONE; 647 648 memcpy(ndev_work->cmds, cmds, sizeof(ndev_work->cmds)); 649 for (i = 0; i < ARRAY_SIZE(ndev_work->cmds) && ndev_work->cmds[i].cb; i++) { 650 if (!ndev_work->cmds[i].ndev) 651 ndev_work->cmds[i].ndev = ndev; 652 if (!ndev_work->cmds[i].filter_ndev) 653 ndev_work->cmds[i].filter_ndev = ndev; 654 dev_hold(ndev_work->cmds[i].ndev); 655 dev_hold(ndev_work->cmds[i].filter_ndev); 656 } 657 INIT_WORK(&ndev_work->work, netdevice_event_work_handler); 658 659 queue_work(gid_cache_wq, &ndev_work->work); 660 661 return NOTIFY_DONE; 662} 663 664static const struct netdev_event_work_cmd add_cmd = { 665 .cb = add_netdev_ips, 666 .filter = is_eth_port_of_netdev_filter 667}; 668 669static const struct netdev_event_work_cmd add_cmd_upper_ips = { 670 .cb = add_netdev_upper_ips, 671 .filter = is_eth_port_of_netdev_filter 672}; 673 674static void 675ndev_event_unlink(struct netdev_notifier_changeupper_info *changeupper_info, 676 struct netdev_event_work_cmd *cmds) 677{ 678 static const struct netdev_event_work_cmd 679 upper_ips_del_cmd = { 680 .cb = del_netdev_upper_ips, 681 .filter = upper_device_filter 682 }; 683 684 cmds[0] = upper_ips_del_cmd; 685 cmds[0].ndev = changeupper_info->upper_dev; 686 cmds[1] = add_cmd; 687} 688 689static const struct netdev_event_work_cmd bonding_default_add_cmd = { 690 .cb = add_default_gids, 691 .filter = is_upper_ndev_bond_master_filter 692}; 693 694static void 695ndev_event_link(struct net_device *event_ndev, 696 struct netdev_notifier_changeupper_info *changeupper_info, 697 struct netdev_event_work_cmd *cmds) 698{ 699 static const struct netdev_event_work_cmd 700 bonding_default_del_cmd = { 701 .cb = del_default_gids, 702 .filter = is_upper_ndev_bond_master_filter 703 }; 704 /* 705 * When a lower netdev is linked to its upper bonding 706 * netdev, delete lower slave netdev's default GIDs. 707 */ 708 cmds[0] = bonding_default_del_cmd; 709 cmds[0].ndev = event_ndev; 710 cmds[0].filter_ndev = changeupper_info->upper_dev; 711 712 /* Now add bonding upper device default GIDs */ 713 cmds[1] = bonding_default_add_cmd; 714 cmds[1].ndev = changeupper_info->upper_dev; 715 cmds[1].filter_ndev = changeupper_info->upper_dev; 716 717 /* Now add bonding upper device IP based GIDs */ 718 cmds[2] = add_cmd_upper_ips; 719 cmds[2].ndev = changeupper_info->upper_dev; 720 cmds[2].filter_ndev = changeupper_info->upper_dev; 721} 722 723static void netdevice_event_changeupper(struct net_device *event_ndev, 724 struct netdev_notifier_changeupper_info *changeupper_info, 725 struct netdev_event_work_cmd *cmds) 726{ 727 if (changeupper_info->linking) 728 ndev_event_link(event_ndev, changeupper_info, cmds); 729 else 730 ndev_event_unlink(changeupper_info, cmds); 731} 732 733static const struct netdev_event_work_cmd add_default_gid_cmd = { 734 .cb = add_default_gids, 735 .filter = is_ndev_for_default_gid_filter, 736}; 737 738static int netdevice_event(struct notifier_block *this, unsigned long event, 739 void *ptr) 740{ 741 static const struct netdev_event_work_cmd del_cmd = { 742 .cb = del_netdev_ips, .filter = pass_all_filter}; 743 static const struct netdev_event_work_cmd 744 bonding_default_del_cmd_join = { 745 .cb = del_netdev_default_ips_join, 746 .filter = is_eth_port_inactive_slave_filter 747 }; 748 static const struct netdev_event_work_cmd 749 netdev_del_cmd = { 750 .cb = del_netdev_ips, 751 .filter = is_eth_port_of_netdev_filter 752 }; 753 static const struct netdev_event_work_cmd bonding_event_ips_del_cmd = { 754 .cb = del_netdev_upper_ips, .filter = upper_device_filter}; 755 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 756 struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ] = { {NULL} }; 757 758 if (ndev->type != ARPHRD_ETHER) 759 return NOTIFY_DONE; 760 761 switch (event) { 762 case NETDEV_REGISTER: 763 case NETDEV_UP: 764 cmds[0] = bonding_default_del_cmd_join; 765 cmds[1] = add_default_gid_cmd; 766 cmds[2] = add_cmd; 767 break; 768 769 case NETDEV_UNREGISTER: 770 if (ndev->reg_state < NETREG_UNREGISTERED) 771 cmds[0] = del_cmd; 772 else 773 return NOTIFY_DONE; 774 break; 775 776 case NETDEV_CHANGEADDR: 777 cmds[0] = netdev_del_cmd; 778 if (ndev->reg_state == NETREG_REGISTERED) { 779 cmds[1] = add_default_gid_cmd; 780 cmds[2] = add_cmd; 781 } 782 break; 783 784 case NETDEV_CHANGEUPPER: 785 netdevice_event_changeupper(ndev, 786 container_of(ptr, struct netdev_notifier_changeupper_info, info), 787 cmds); 788 break; 789 790 case NETDEV_BONDING_FAILOVER: 791 cmds[0] = bonding_event_ips_del_cmd; 792 /* Add default GIDs of the bond device */ 793 cmds[1] = bonding_default_add_cmd; 794 /* Add IP based GIDs of the bond device */ 795 cmds[2] = add_cmd_upper_ips; 796 break; 797 798 default: 799 return NOTIFY_DONE; 800 } 801 802 return netdevice_queue_work(cmds, ndev); 803} 804 805static void update_gid_event_work_handler(struct work_struct *_work) 806{ 807 struct update_gid_event_work *work = 808 container_of(_work, struct update_gid_event_work, work); 809 810 ib_enum_all_roce_netdevs(is_eth_port_of_netdev_filter, 811 work->gid_attr.ndev, 812 callback_for_addr_gid_device_scan, work); 813 814 dev_put(work->gid_attr.ndev); 815 kfree(work); 816} 817 818static int addr_event(struct notifier_block *this, unsigned long event, 819 struct sockaddr *sa, struct net_device *ndev) 820{ 821 struct update_gid_event_work *work; 822 enum gid_op_type gid_op; 823 824 if (ndev->type != ARPHRD_ETHER) 825 return NOTIFY_DONE; 826 827 switch (event) { 828 case NETDEV_UP: 829 gid_op = GID_ADD; 830 break; 831 832 case NETDEV_DOWN: 833 gid_op = GID_DEL; 834 break; 835 836 default: 837 return NOTIFY_DONE; 838 } 839 840 work = kmalloc(sizeof(*work), GFP_ATOMIC); 841 if (!work) 842 return NOTIFY_DONE; 843 844 INIT_WORK(&work->work, update_gid_event_work_handler); 845 846 rdma_ip2gid(sa, &work->gid); 847 work->gid_op = gid_op; 848 849 memset(&work->gid_attr, 0, sizeof(work->gid_attr)); 850 dev_hold(ndev); 851 work->gid_attr.ndev = ndev; 852 853 queue_work(gid_cache_wq, &work->work); 854 855 return NOTIFY_DONE; 856} 857 858static int inetaddr_event(struct notifier_block *this, unsigned long event, 859 void *ptr) 860{ 861 struct sockaddr_in in; 862 struct net_device *ndev; 863 struct in_ifaddr *ifa = ptr; 864 865 in.sin_family = AF_INET; 866 in.sin_addr.s_addr = ifa->ifa_address; 867 ndev = ifa->ifa_dev->dev; 868 869 return addr_event(this, event, (struct sockaddr *)&in, ndev); 870} 871 872static int inet6addr_event(struct notifier_block *this, unsigned long event, 873 void *ptr) 874{ 875 struct sockaddr_in6 in6; 876 struct net_device *ndev; 877 struct inet6_ifaddr *ifa6 = ptr; 878 879 in6.sin6_family = AF_INET6; 880 in6.sin6_addr = ifa6->addr; 881 ndev = ifa6->idev->dev; 882 883 return addr_event(this, event, (struct sockaddr *)&in6, ndev); 884} 885 886static struct notifier_block nb_netdevice = { 887 .notifier_call = netdevice_event 888}; 889 890static struct notifier_block nb_inetaddr = { 891 .notifier_call = inetaddr_event 892}; 893 894static struct notifier_block nb_inet6addr = { 895 .notifier_call = inet6addr_event 896}; 897 898int __init roce_gid_mgmt_init(void) 899{ 900 gid_cache_wq = alloc_ordered_workqueue("gid-cache-wq", 0); 901 if (!gid_cache_wq) 902 return -ENOMEM; 903 904 register_inetaddr_notifier(&nb_inetaddr); 905 if (IS_ENABLED(CONFIG_IPV6)) 906 register_inet6addr_notifier(&nb_inet6addr); 907 /* We relay on the netdevice notifier to enumerate all 908 * existing devices in the system. Register to this notifier 909 * last to make sure we will not miss any IP add/del 910 * callbacks. 911 */ 912 register_netdevice_notifier(&nb_netdevice); 913 914 return 0; 915} 916 917void __exit roce_gid_mgmt_cleanup(void) 918{ 919 if (IS_ENABLED(CONFIG_IPV6)) 920 unregister_inet6addr_notifier(&nb_inet6addr); 921 unregister_inetaddr_notifier(&nb_inetaddr); 922 unregister_netdevice_notifier(&nb_netdevice); 923 /* Ensure all gid deletion tasks complete before we go down, 924 * to avoid any reference to free'd memory. By the time 925 * ib-core is removed, all physical devices have been removed, 926 * so no issue with remaining hardware contexts. 927 */ 928 destroy_workqueue(gid_cache_wq); 929} 930