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 45 enum gid_op_type { 46 GID_DEL = 0, 47 GID_ADD 48 }; 49 50 struct update_gid_event_work { 51 struct work_struct work; 52 union ib_gid gid; 53 struct ib_gid_attr gid_attr; 54 enum gid_op_type gid_op; 55 }; 56 57 #define ROCE_NETDEV_CALLBACK_SZ 3 58 struct netdev_event_work_cmd { 59 roce_netdev_callback cb; 60 roce_netdev_filter filter; 61 struct net_device *ndev; 62 struct net_device *filter_ndev; 63 }; 64 65 struct netdev_event_work { 66 struct work_struct work; 67 struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ]; 68 }; 69 70 static void update_gid(enum gid_op_type gid_op, struct ib_device *ib_dev, 71 u8 port, union ib_gid *gid, 72 struct ib_gid_attr *gid_attr) 73 { 74 switch (gid_op) { 75 case GID_ADD: 76 ib_cache_gid_add(ib_dev, port, gid, gid_attr); 77 break; 78 case GID_DEL: 79 ib_cache_gid_del(ib_dev, port, gid, gid_attr); 80 break; 81 } 82 } 83 84 enum bonding_slave_state { 85 BONDING_SLAVE_STATE_ACTIVE = 1UL << 0, 86 BONDING_SLAVE_STATE_INACTIVE = 1UL << 1, 87 /* No primary slave or the device isn't a slave in bonding */ 88 BONDING_SLAVE_STATE_NA = 1UL << 2, 89 }; 90 91 static enum bonding_slave_state is_eth_active_slave_of_bonding_rcu(struct net_device *dev, 92 struct net_device *upper) 93 { 94 if (upper && netif_is_bond_master(upper)) { 95 struct net_device *pdev = 96 bond_option_active_slave_get_rcu(netdev_priv(upper)); 97 98 if (pdev) 99 return dev == pdev ? BONDING_SLAVE_STATE_ACTIVE : 100 BONDING_SLAVE_STATE_INACTIVE; 101 } 102 103 return BONDING_SLAVE_STATE_NA; 104 } 105 106 static bool is_upper_dev_rcu(struct net_device *dev, struct net_device *upper) 107 { 108 struct net_device *_upper = NULL; 109 struct list_head *iter; 110 111 netdev_for_each_all_upper_dev_rcu(dev, _upper, iter) 112 if (_upper == upper) 113 break; 114 115 return _upper == upper; 116 } 117 118 #define REQUIRED_BOND_STATES (BONDING_SLAVE_STATE_ACTIVE | \ 119 BONDING_SLAVE_STATE_NA) 120 static int is_eth_port_of_netdev(struct ib_device *ib_dev, u8 port, 121 struct net_device *rdma_ndev, void *cookie) 122 { 123 struct net_device *event_ndev = (struct net_device *)cookie; 124 struct net_device *real_dev; 125 int res; 126 127 if (!rdma_ndev) 128 return 0; 129 130 rcu_read_lock(); 131 real_dev = rdma_vlan_dev_real_dev(event_ndev); 132 if (!real_dev) 133 real_dev = event_ndev; 134 135 res = ((is_upper_dev_rcu(rdma_ndev, event_ndev) && 136 (is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) & 137 REQUIRED_BOND_STATES)) || 138 real_dev == rdma_ndev); 139 140 rcu_read_unlock(); 141 return res; 142 } 143 144 static int is_eth_port_inactive_slave(struct ib_device *ib_dev, u8 port, 145 struct net_device *rdma_ndev, void *cookie) 146 { 147 struct net_device *master_dev; 148 int res; 149 150 if (!rdma_ndev) 151 return 0; 152 153 rcu_read_lock(); 154 master_dev = netdev_master_upper_dev_get_rcu(rdma_ndev); 155 res = is_eth_active_slave_of_bonding_rcu(rdma_ndev, master_dev) == 156 BONDING_SLAVE_STATE_INACTIVE; 157 rcu_read_unlock(); 158 159 return res; 160 } 161 162 static int pass_all_filter(struct ib_device *ib_dev, u8 port, 163 struct net_device *rdma_ndev, void *cookie) 164 { 165 return 1; 166 } 167 168 static int upper_device_filter(struct ib_device *ib_dev, u8 port, 169 struct net_device *rdma_ndev, void *cookie) 170 { 171 struct net_device *event_ndev = (struct net_device *)cookie; 172 int res; 173 174 if (!rdma_ndev) 175 return 0; 176 177 if (rdma_ndev == event_ndev) 178 return 1; 179 180 rcu_read_lock(); 181 res = is_upper_dev_rcu(rdma_ndev, event_ndev); 182 rcu_read_unlock(); 183 184 return res; 185 } 186 187 static void update_gid_ip(enum gid_op_type gid_op, 188 struct ib_device *ib_dev, 189 u8 port, struct net_device *ndev, 190 struct sockaddr *addr) 191 { 192 union ib_gid gid; 193 struct ib_gid_attr gid_attr; 194 195 rdma_ip2gid(addr, &gid); 196 memset(&gid_attr, 0, sizeof(gid_attr)); 197 gid_attr.ndev = ndev; 198 199 update_gid(gid_op, ib_dev, port, &gid, &gid_attr); 200 } 201 202 static void enum_netdev_default_gids(struct ib_device *ib_dev, 203 u8 port, struct net_device *event_ndev, 204 struct net_device *rdma_ndev) 205 { 206 rcu_read_lock(); 207 if (!rdma_ndev || 208 ((rdma_ndev != event_ndev && 209 !is_upper_dev_rcu(rdma_ndev, event_ndev)) || 210 is_eth_active_slave_of_bonding_rcu(rdma_ndev, 211 netdev_master_upper_dev_get_rcu(rdma_ndev)) == 212 BONDING_SLAVE_STATE_INACTIVE)) { 213 rcu_read_unlock(); 214 return; 215 } 216 rcu_read_unlock(); 217 218 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, 219 IB_CACHE_GID_DEFAULT_MODE_SET); 220 } 221 222 static void bond_delete_netdev_default_gids(struct ib_device *ib_dev, 223 u8 port, 224 struct net_device *event_ndev, 225 struct net_device *rdma_ndev) 226 { 227 struct net_device *real_dev = rdma_vlan_dev_real_dev(event_ndev); 228 229 if (!rdma_ndev) 230 return; 231 232 if (!real_dev) 233 real_dev = event_ndev; 234 235 rcu_read_lock(); 236 237 if (is_upper_dev_rcu(rdma_ndev, event_ndev) && 238 is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) == 239 BONDING_SLAVE_STATE_INACTIVE) { 240 rcu_read_unlock(); 241 242 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, 243 IB_CACHE_GID_DEFAULT_MODE_DELETE); 244 } else { 245 rcu_read_unlock(); 246 } 247 } 248 249 static void enum_netdev_ipv4_ips(struct ib_device *ib_dev, 250 u8 port, struct net_device *ndev) 251 { 252 struct in_device *in_dev; 253 254 if (ndev->reg_state >= NETREG_UNREGISTERING) 255 return; 256 257 in_dev = in_dev_get(ndev); 258 if (!in_dev) 259 return; 260 261 for_ifa(in_dev) { 262 struct sockaddr_in ip; 263 264 ip.sin_family = AF_INET; 265 ip.sin_addr.s_addr = ifa->ifa_address; 266 update_gid_ip(GID_ADD, ib_dev, port, ndev, 267 (struct sockaddr *)&ip); 268 } 269 endfor_ifa(in_dev); 270 271 in_dev_put(in_dev); 272 } 273 274 static void enum_netdev_ipv6_ips(struct ib_device *ib_dev, 275 u8 port, struct net_device *ndev) 276 { 277 struct inet6_ifaddr *ifp; 278 struct inet6_dev *in6_dev; 279 struct sin6_list { 280 struct list_head list; 281 struct sockaddr_in6 sin6; 282 }; 283 struct sin6_list *sin6_iter; 284 struct sin6_list *sin6_temp; 285 struct ib_gid_attr gid_attr = {.ndev = ndev}; 286 LIST_HEAD(sin6_list); 287 288 if (ndev->reg_state >= NETREG_UNREGISTERING) 289 return; 290 291 in6_dev = in6_dev_get(ndev); 292 if (!in6_dev) 293 return; 294 295 read_lock_bh(&in6_dev->lock); 296 list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { 297 struct sin6_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC); 298 299 if (!entry) { 300 pr_warn("roce_gid_mgmt: couldn't allocate entry for IPv6 update\n"); 301 continue; 302 } 303 304 entry->sin6.sin6_family = AF_INET6; 305 entry->sin6.sin6_addr = ifp->addr; 306 list_add_tail(&entry->list, &sin6_list); 307 } 308 read_unlock_bh(&in6_dev->lock); 309 310 in6_dev_put(in6_dev); 311 312 list_for_each_entry_safe(sin6_iter, sin6_temp, &sin6_list, list) { 313 union ib_gid gid; 314 315 rdma_ip2gid((struct sockaddr *)&sin6_iter->sin6, &gid); 316 update_gid(GID_ADD, ib_dev, port, &gid, &gid_attr); 317 list_del(&sin6_iter->list); 318 kfree(sin6_iter); 319 } 320 } 321 322 static void _add_netdev_ips(struct ib_device *ib_dev, u8 port, 323 struct net_device *ndev) 324 { 325 enum_netdev_ipv4_ips(ib_dev, port, ndev); 326 if (IS_ENABLED(CONFIG_IPV6)) 327 enum_netdev_ipv6_ips(ib_dev, port, ndev); 328 } 329 330 static void add_netdev_ips(struct ib_device *ib_dev, u8 port, 331 struct net_device *rdma_ndev, void *cookie) 332 { 333 struct net_device *event_ndev = (struct net_device *)cookie; 334 335 enum_netdev_default_gids(ib_dev, port, event_ndev, rdma_ndev); 336 _add_netdev_ips(ib_dev, port, event_ndev); 337 } 338 339 static void del_netdev_ips(struct ib_device *ib_dev, u8 port, 340 struct net_device *rdma_ndev, void *cookie) 341 { 342 struct net_device *event_ndev = (struct net_device *)cookie; 343 344 ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev); 345 } 346 347 static void enum_all_gids_of_dev_cb(struct ib_device *ib_dev, 348 u8 port, 349 struct net_device *rdma_ndev, 350 void *cookie) 351 { 352 struct net *net; 353 struct net_device *ndev; 354 355 /* Lock the rtnl to make sure the netdevs does not move under 356 * our feet 357 */ 358 rtnl_lock(); 359 for_each_net(net) 360 for_each_netdev(net, ndev) 361 if (is_eth_port_of_netdev(ib_dev, port, rdma_ndev, ndev)) 362 add_netdev_ips(ib_dev, port, rdma_ndev, ndev); 363 rtnl_unlock(); 364 } 365 366 /* This function will rescan all of the network devices in the system 367 * and add their gids, as needed, to the relevant RoCE devices. */ 368 int roce_rescan_device(struct ib_device *ib_dev) 369 { 370 ib_enum_roce_netdev(ib_dev, pass_all_filter, NULL, 371 enum_all_gids_of_dev_cb, NULL); 372 373 return 0; 374 } 375 376 static void callback_for_addr_gid_device_scan(struct ib_device *device, 377 u8 port, 378 struct net_device *rdma_ndev, 379 void *cookie) 380 { 381 struct update_gid_event_work *parsed = cookie; 382 383 return update_gid(parsed->gid_op, device, 384 port, &parsed->gid, 385 &parsed->gid_attr); 386 } 387 388 static void handle_netdev_upper(struct ib_device *ib_dev, u8 port, 389 void *cookie, 390 void (*handle_netdev)(struct ib_device *ib_dev, 391 u8 port, 392 struct net_device *ndev)) 393 { 394 struct net_device *ndev = (struct net_device *)cookie; 395 struct upper_list { 396 struct list_head list; 397 struct net_device *upper; 398 }; 399 struct net_device *upper; 400 struct list_head *iter; 401 struct upper_list *upper_iter; 402 struct upper_list *upper_temp; 403 LIST_HEAD(upper_list); 404 405 rcu_read_lock(); 406 netdev_for_each_all_upper_dev_rcu(ndev, upper, iter) { 407 struct upper_list *entry = kmalloc(sizeof(*entry), 408 GFP_ATOMIC); 409 410 if (!entry) { 411 pr_info("roce_gid_mgmt: couldn't allocate entry to delete ndev\n"); 412 continue; 413 } 414 415 list_add_tail(&entry->list, &upper_list); 416 dev_hold(upper); 417 entry->upper = upper; 418 } 419 rcu_read_unlock(); 420 421 handle_netdev(ib_dev, port, ndev); 422 list_for_each_entry_safe(upper_iter, upper_temp, &upper_list, 423 list) { 424 handle_netdev(ib_dev, port, upper_iter->upper); 425 dev_put(upper_iter->upper); 426 list_del(&upper_iter->list); 427 kfree(upper_iter); 428 } 429 } 430 431 static void _roce_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, 432 struct net_device *event_ndev) 433 { 434 ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev); 435 } 436 437 static void del_netdev_upper_ips(struct ib_device *ib_dev, u8 port, 438 struct net_device *rdma_ndev, void *cookie) 439 { 440 handle_netdev_upper(ib_dev, port, cookie, _roce_del_all_netdev_gids); 441 } 442 443 static void add_netdev_upper_ips(struct ib_device *ib_dev, u8 port, 444 struct net_device *rdma_ndev, void *cookie) 445 { 446 handle_netdev_upper(ib_dev, port, cookie, _add_netdev_ips); 447 } 448 449 static void del_netdev_default_ips_join(struct ib_device *ib_dev, u8 port, 450 struct net_device *rdma_ndev, 451 void *cookie) 452 { 453 struct net_device *master_ndev; 454 455 rcu_read_lock(); 456 master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev); 457 if (master_ndev) 458 dev_hold(master_ndev); 459 rcu_read_unlock(); 460 461 if (master_ndev) { 462 bond_delete_netdev_default_gids(ib_dev, port, master_ndev, 463 rdma_ndev); 464 dev_put(master_ndev); 465 } 466 } 467 468 static void del_netdev_default_ips(struct ib_device *ib_dev, u8 port, 469 struct net_device *rdma_ndev, void *cookie) 470 { 471 struct net_device *event_ndev = (struct net_device *)cookie; 472 473 bond_delete_netdev_default_gids(ib_dev, port, event_ndev, rdma_ndev); 474 } 475 476 /* The following functions operate on all IB devices. netdevice_event and 477 * addr_event execute ib_enum_all_roce_netdevs through a work. 478 * ib_enum_all_roce_netdevs iterates through all IB devices. 479 */ 480 481 static void netdevice_event_work_handler(struct work_struct *_work) 482 { 483 struct netdev_event_work *work = 484 container_of(_work, struct netdev_event_work, work); 485 unsigned int i; 486 487 for (i = 0; i < ARRAY_SIZE(work->cmds) && work->cmds[i].cb; i++) { 488 ib_enum_all_roce_netdevs(work->cmds[i].filter, 489 work->cmds[i].filter_ndev, 490 work->cmds[i].cb, 491 work->cmds[i].ndev); 492 dev_put(work->cmds[i].ndev); 493 dev_put(work->cmds[i].filter_ndev); 494 } 495 496 kfree(work); 497 } 498 499 static int netdevice_queue_work(struct netdev_event_work_cmd *cmds, 500 struct net_device *ndev) 501 { 502 unsigned int i; 503 struct netdev_event_work *ndev_work = 504 kmalloc(sizeof(*ndev_work), GFP_KERNEL); 505 506 if (!ndev_work) { 507 pr_warn("roce_gid_mgmt: can't allocate work for netdevice_event\n"); 508 return NOTIFY_DONE; 509 } 510 511 memcpy(ndev_work->cmds, cmds, sizeof(ndev_work->cmds)); 512 for (i = 0; i < ARRAY_SIZE(ndev_work->cmds) && ndev_work->cmds[i].cb; i++) { 513 if (!ndev_work->cmds[i].ndev) 514 ndev_work->cmds[i].ndev = ndev; 515 if (!ndev_work->cmds[i].filter_ndev) 516 ndev_work->cmds[i].filter_ndev = ndev; 517 dev_hold(ndev_work->cmds[i].ndev); 518 dev_hold(ndev_work->cmds[i].filter_ndev); 519 } 520 INIT_WORK(&ndev_work->work, netdevice_event_work_handler); 521 522 queue_work(ib_wq, &ndev_work->work); 523 524 return NOTIFY_DONE; 525 } 526 527 static const struct netdev_event_work_cmd add_cmd = { 528 .cb = add_netdev_ips, .filter = is_eth_port_of_netdev}; 529 static const struct netdev_event_work_cmd add_cmd_upper_ips = { 530 .cb = add_netdev_upper_ips, .filter = is_eth_port_of_netdev}; 531 532 static void netdevice_event_changeupper(struct netdev_notifier_changeupper_info *changeupper_info, 533 struct netdev_event_work_cmd *cmds) 534 { 535 static const struct netdev_event_work_cmd upper_ips_del_cmd = { 536 .cb = del_netdev_upper_ips, .filter = upper_device_filter}; 537 static const struct netdev_event_work_cmd bonding_default_del_cmd = { 538 .cb = del_netdev_default_ips, .filter = is_eth_port_inactive_slave}; 539 540 if (changeupper_info->linking == false) { 541 cmds[0] = upper_ips_del_cmd; 542 cmds[0].ndev = changeupper_info->upper_dev; 543 cmds[1] = add_cmd; 544 } else { 545 cmds[0] = bonding_default_del_cmd; 546 cmds[0].ndev = changeupper_info->upper_dev; 547 cmds[1] = add_cmd_upper_ips; 548 cmds[1].ndev = changeupper_info->upper_dev; 549 cmds[1].filter_ndev = changeupper_info->upper_dev; 550 } 551 } 552 553 static int netdevice_event(struct notifier_block *this, unsigned long event, 554 void *ptr) 555 { 556 static const struct netdev_event_work_cmd del_cmd = { 557 .cb = del_netdev_ips, .filter = pass_all_filter}; 558 static const struct netdev_event_work_cmd bonding_default_del_cmd_join = { 559 .cb = del_netdev_default_ips_join, .filter = is_eth_port_inactive_slave}; 560 static const struct netdev_event_work_cmd default_del_cmd = { 561 .cb = del_netdev_default_ips, .filter = pass_all_filter}; 562 static const struct netdev_event_work_cmd bonding_event_ips_del_cmd = { 563 .cb = del_netdev_upper_ips, .filter = upper_device_filter}; 564 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 565 struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ] = { {NULL} }; 566 567 if (ndev->type != ARPHRD_ETHER) 568 return NOTIFY_DONE; 569 570 switch (event) { 571 case NETDEV_REGISTER: 572 case NETDEV_UP: 573 cmds[0] = bonding_default_del_cmd_join; 574 cmds[1] = add_cmd; 575 break; 576 577 case NETDEV_UNREGISTER: 578 if (ndev->reg_state < NETREG_UNREGISTERED) 579 cmds[0] = del_cmd; 580 else 581 return NOTIFY_DONE; 582 break; 583 584 case NETDEV_CHANGEADDR: 585 cmds[0] = default_del_cmd; 586 cmds[1] = add_cmd; 587 break; 588 589 case NETDEV_CHANGEUPPER: 590 netdevice_event_changeupper( 591 container_of(ptr, struct netdev_notifier_changeupper_info, info), 592 cmds); 593 break; 594 595 case NETDEV_BONDING_FAILOVER: 596 cmds[0] = bonding_event_ips_del_cmd; 597 cmds[1] = bonding_default_del_cmd_join; 598 cmds[2] = add_cmd_upper_ips; 599 break; 600 601 default: 602 return NOTIFY_DONE; 603 } 604 605 return netdevice_queue_work(cmds, ndev); 606 } 607 608 static void update_gid_event_work_handler(struct work_struct *_work) 609 { 610 struct update_gid_event_work *work = 611 container_of(_work, struct update_gid_event_work, work); 612 613 ib_enum_all_roce_netdevs(is_eth_port_of_netdev, work->gid_attr.ndev, 614 callback_for_addr_gid_device_scan, work); 615 616 dev_put(work->gid_attr.ndev); 617 kfree(work); 618 } 619 620 static int addr_event(struct notifier_block *this, unsigned long event, 621 struct sockaddr *sa, struct net_device *ndev) 622 { 623 struct update_gid_event_work *work; 624 enum gid_op_type gid_op; 625 626 if (ndev->type != ARPHRD_ETHER) 627 return NOTIFY_DONE; 628 629 switch (event) { 630 case NETDEV_UP: 631 gid_op = GID_ADD; 632 break; 633 634 case NETDEV_DOWN: 635 gid_op = GID_DEL; 636 break; 637 638 default: 639 return NOTIFY_DONE; 640 } 641 642 work = kmalloc(sizeof(*work), GFP_ATOMIC); 643 if (!work) { 644 pr_warn("roce_gid_mgmt: Couldn't allocate work for addr_event\n"); 645 return NOTIFY_DONE; 646 } 647 648 INIT_WORK(&work->work, update_gid_event_work_handler); 649 650 rdma_ip2gid(sa, &work->gid); 651 work->gid_op = gid_op; 652 653 memset(&work->gid_attr, 0, sizeof(work->gid_attr)); 654 dev_hold(ndev); 655 work->gid_attr.ndev = ndev; 656 657 queue_work(ib_wq, &work->work); 658 659 return NOTIFY_DONE; 660 } 661 662 static int inetaddr_event(struct notifier_block *this, unsigned long event, 663 void *ptr) 664 { 665 struct sockaddr_in in; 666 struct net_device *ndev; 667 struct in_ifaddr *ifa = ptr; 668 669 in.sin_family = AF_INET; 670 in.sin_addr.s_addr = ifa->ifa_address; 671 ndev = ifa->ifa_dev->dev; 672 673 return addr_event(this, event, (struct sockaddr *)&in, ndev); 674 } 675 676 static int inet6addr_event(struct notifier_block *this, unsigned long event, 677 void *ptr) 678 { 679 struct sockaddr_in6 in6; 680 struct net_device *ndev; 681 struct inet6_ifaddr *ifa6 = ptr; 682 683 in6.sin6_family = AF_INET6; 684 in6.sin6_addr = ifa6->addr; 685 ndev = ifa6->idev->dev; 686 687 return addr_event(this, event, (struct sockaddr *)&in6, ndev); 688 } 689 690 static struct notifier_block nb_netdevice = { 691 .notifier_call = netdevice_event 692 }; 693 694 static struct notifier_block nb_inetaddr = { 695 .notifier_call = inetaddr_event 696 }; 697 698 static struct notifier_block nb_inet6addr = { 699 .notifier_call = inet6addr_event 700 }; 701 702 int __init roce_gid_mgmt_init(void) 703 { 704 register_inetaddr_notifier(&nb_inetaddr); 705 if (IS_ENABLED(CONFIG_IPV6)) 706 register_inet6addr_notifier(&nb_inet6addr); 707 /* We relay on the netdevice notifier to enumerate all 708 * existing devices in the system. Register to this notifier 709 * last to make sure we will not miss any IP add/del 710 * callbacks. 711 */ 712 register_netdevice_notifier(&nb_netdevice); 713 714 return 0; 715 } 716 717 void __exit roce_gid_mgmt_cleanup(void) 718 { 719 if (IS_ENABLED(CONFIG_IPV6)) 720 unregister_inet6addr_notifier(&nb_inet6addr); 721 unregister_inetaddr_notifier(&nb_inetaddr); 722 unregister_netdevice_notifier(&nb_netdevice); 723 /* Ensure all gid deletion tasks complete before we go down, 724 * to avoid any reference to free'd memory. By the time 725 * ib-core is removed, all physical devices have been removed, 726 * so no issue with remaining hardware contexts. 727 */ 728 } 729