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 const struct { 71 bool (*is_supported)(const struct ib_device *device, u8 port_num); 72 enum ib_gid_type gid_type; 73 } PORT_CAP_TO_GID_TYPE[] = { 74 {rdma_protocol_roce_eth_encap, IB_GID_TYPE_ROCE}, 75 {rdma_protocol_roce_udp_encap, IB_GID_TYPE_ROCE_UDP_ENCAP}, 76 }; 77 78 #define CAP_TO_GID_TABLE_SIZE ARRAY_SIZE(PORT_CAP_TO_GID_TYPE) 79 80 unsigned long roce_gid_type_mask_support(struct ib_device *ib_dev, u8 port) 81 { 82 int i; 83 unsigned int ret_flags = 0; 84 85 if (!rdma_protocol_roce(ib_dev, port)) 86 return 1UL << IB_GID_TYPE_IB; 87 88 for (i = 0; i < CAP_TO_GID_TABLE_SIZE; i++) 89 if (PORT_CAP_TO_GID_TYPE[i].is_supported(ib_dev, port)) 90 ret_flags |= 1UL << PORT_CAP_TO_GID_TYPE[i].gid_type; 91 92 return ret_flags; 93 } 94 EXPORT_SYMBOL(roce_gid_type_mask_support); 95 96 static void update_gid(enum gid_op_type gid_op, struct ib_device *ib_dev, 97 u8 port, union ib_gid *gid, 98 struct ib_gid_attr *gid_attr) 99 { 100 int i; 101 unsigned long gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 102 103 for (i = 0; i < IB_GID_TYPE_SIZE; i++) { 104 if ((1UL << i) & gid_type_mask) { 105 gid_attr->gid_type = i; 106 switch (gid_op) { 107 case GID_ADD: 108 ib_cache_gid_add(ib_dev, port, 109 gid, gid_attr); 110 break; 111 case GID_DEL: 112 ib_cache_gid_del(ib_dev, port, 113 gid, gid_attr); 114 break; 115 } 116 } 117 } 118 } 119 120 enum bonding_slave_state { 121 BONDING_SLAVE_STATE_ACTIVE = 1UL << 0, 122 BONDING_SLAVE_STATE_INACTIVE = 1UL << 1, 123 /* No primary slave or the device isn't a slave in bonding */ 124 BONDING_SLAVE_STATE_NA = 1UL << 2, 125 }; 126 127 static enum bonding_slave_state is_eth_active_slave_of_bonding_rcu(struct net_device *dev, 128 struct net_device *upper) 129 { 130 if (upper && netif_is_bond_master(upper)) { 131 struct net_device *pdev = 132 bond_option_active_slave_get_rcu(netdev_priv(upper)); 133 134 if (pdev) 135 return dev == pdev ? BONDING_SLAVE_STATE_ACTIVE : 136 BONDING_SLAVE_STATE_INACTIVE; 137 } 138 139 return BONDING_SLAVE_STATE_NA; 140 } 141 142 #define REQUIRED_BOND_STATES (BONDING_SLAVE_STATE_ACTIVE | \ 143 BONDING_SLAVE_STATE_NA) 144 static int is_eth_port_of_netdev(struct ib_device *ib_dev, u8 port, 145 struct net_device *rdma_ndev, void *cookie) 146 { 147 struct net_device *real_dev; 148 int res; 149 150 if (!rdma_ndev) 151 return 0; 152 153 rcu_read_lock(); 154 real_dev = rdma_vlan_dev_real_dev(cookie); 155 if (!real_dev) 156 real_dev = cookie; 157 158 res = ((rdma_is_upper_dev_rcu(rdma_ndev, cookie) && 159 (is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) & 160 REQUIRED_BOND_STATES)) || 161 real_dev == rdma_ndev); 162 163 rcu_read_unlock(); 164 return res; 165 } 166 167 static int is_eth_port_inactive_slave(struct ib_device *ib_dev, u8 port, 168 struct net_device *rdma_ndev, void *cookie) 169 { 170 struct net_device *master_dev; 171 int res; 172 173 if (!rdma_ndev) 174 return 0; 175 176 rcu_read_lock(); 177 master_dev = netdev_master_upper_dev_get_rcu(rdma_ndev); 178 res = is_eth_active_slave_of_bonding_rcu(rdma_ndev, master_dev) == 179 BONDING_SLAVE_STATE_INACTIVE; 180 rcu_read_unlock(); 181 182 return res; 183 } 184 185 static int pass_all_filter(struct ib_device *ib_dev, u8 port, 186 struct net_device *rdma_ndev, void *cookie) 187 { 188 return 1; 189 } 190 191 static int upper_device_filter(struct ib_device *ib_dev, u8 port, 192 struct net_device *rdma_ndev, void *cookie) 193 { 194 int res; 195 196 if (!rdma_ndev) 197 return 0; 198 199 if (rdma_ndev == cookie) 200 return 1; 201 202 rcu_read_lock(); 203 res = rdma_is_upper_dev_rcu(rdma_ndev, cookie); 204 rcu_read_unlock(); 205 206 return res; 207 } 208 209 static void update_gid_ip(enum gid_op_type gid_op, 210 struct ib_device *ib_dev, 211 u8 port, struct net_device *ndev, 212 struct sockaddr *addr) 213 { 214 union ib_gid gid; 215 struct ib_gid_attr gid_attr; 216 217 rdma_ip2gid(addr, &gid); 218 memset(&gid_attr, 0, sizeof(gid_attr)); 219 gid_attr.ndev = ndev; 220 221 update_gid(gid_op, ib_dev, port, &gid, &gid_attr); 222 } 223 224 static void enum_netdev_default_gids(struct ib_device *ib_dev, 225 u8 port, struct net_device *event_ndev, 226 struct net_device *rdma_ndev) 227 { 228 unsigned long gid_type_mask; 229 230 rcu_read_lock(); 231 if (!rdma_ndev || 232 ((rdma_ndev != event_ndev && 233 !rdma_is_upper_dev_rcu(rdma_ndev, event_ndev)) || 234 is_eth_active_slave_of_bonding_rcu(rdma_ndev, 235 netdev_master_upper_dev_get_rcu(rdma_ndev)) == 236 BONDING_SLAVE_STATE_INACTIVE)) { 237 rcu_read_unlock(); 238 return; 239 } 240 rcu_read_unlock(); 241 242 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 243 244 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, gid_type_mask, 245 IB_CACHE_GID_DEFAULT_MODE_SET); 246 } 247 248 static void bond_delete_netdev_default_gids(struct ib_device *ib_dev, 249 u8 port, 250 struct net_device *event_ndev, 251 struct net_device *rdma_ndev) 252 { 253 struct net_device *real_dev = rdma_vlan_dev_real_dev(event_ndev); 254 255 if (!rdma_ndev) 256 return; 257 258 if (!real_dev) 259 real_dev = event_ndev; 260 261 rcu_read_lock(); 262 263 if (rdma_is_upper_dev_rcu(rdma_ndev, event_ndev) && 264 is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) == 265 BONDING_SLAVE_STATE_INACTIVE) { 266 unsigned long gid_type_mask; 267 268 rcu_read_unlock(); 269 270 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 271 272 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, 273 gid_type_mask, 274 IB_CACHE_GID_DEFAULT_MODE_DELETE); 275 } else { 276 rcu_read_unlock(); 277 } 278 } 279 280 static void enum_netdev_ipv4_ips(struct ib_device *ib_dev, 281 u8 port, struct net_device *ndev) 282 { 283 struct in_device *in_dev; 284 struct sin_list { 285 struct list_head list; 286 struct sockaddr_in ip; 287 }; 288 struct sin_list *sin_iter; 289 struct sin_list *sin_temp; 290 291 LIST_HEAD(sin_list); 292 if (ndev->reg_state >= NETREG_UNREGISTERING) 293 return; 294 295 rcu_read_lock(); 296 in_dev = __in_dev_get_rcu(ndev); 297 if (!in_dev) { 298 rcu_read_unlock(); 299 return; 300 } 301 302 for_ifa(in_dev) { 303 struct sin_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC); 304 305 if (!entry) 306 continue; 307 308 entry->ip.sin_family = AF_INET; 309 entry->ip.sin_addr.s_addr = ifa->ifa_address; 310 list_add_tail(&entry->list, &sin_list); 311 } 312 endfor_ifa(in_dev); 313 rcu_read_unlock(); 314 315 list_for_each_entry_safe(sin_iter, sin_temp, &sin_list, list) { 316 update_gid_ip(GID_ADD, ib_dev, port, ndev, 317 (struct sockaddr *)&sin_iter->ip); 318 list_del(&sin_iter->list); 319 kfree(sin_iter); 320 } 321 } 322 323 static void enum_netdev_ipv6_ips(struct ib_device *ib_dev, 324 u8 port, struct net_device *ndev) 325 { 326 struct inet6_ifaddr *ifp; 327 struct inet6_dev *in6_dev; 328 struct sin6_list { 329 struct list_head list; 330 struct sockaddr_in6 sin6; 331 }; 332 struct sin6_list *sin6_iter; 333 struct sin6_list *sin6_temp; 334 struct ib_gid_attr gid_attr = {.ndev = ndev}; 335 LIST_HEAD(sin6_list); 336 337 if (ndev->reg_state >= NETREG_UNREGISTERING) 338 return; 339 340 in6_dev = in6_dev_get(ndev); 341 if (!in6_dev) 342 return; 343 344 read_lock_bh(&in6_dev->lock); 345 list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { 346 struct sin6_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC); 347 348 if (!entry) 349 continue; 350 351 entry->sin6.sin6_family = AF_INET6; 352 entry->sin6.sin6_addr = ifp->addr; 353 list_add_tail(&entry->list, &sin6_list); 354 } 355 read_unlock_bh(&in6_dev->lock); 356 357 in6_dev_put(in6_dev); 358 359 list_for_each_entry_safe(sin6_iter, sin6_temp, &sin6_list, list) { 360 union ib_gid gid; 361 362 rdma_ip2gid((struct sockaddr *)&sin6_iter->sin6, &gid); 363 update_gid(GID_ADD, ib_dev, port, &gid, &gid_attr); 364 list_del(&sin6_iter->list); 365 kfree(sin6_iter); 366 } 367 } 368 369 static void _add_netdev_ips(struct ib_device *ib_dev, u8 port, 370 struct net_device *ndev) 371 { 372 enum_netdev_ipv4_ips(ib_dev, port, ndev); 373 if (IS_ENABLED(CONFIG_IPV6)) 374 enum_netdev_ipv6_ips(ib_dev, port, ndev); 375 } 376 377 static void add_netdev_ips(struct ib_device *ib_dev, u8 port, 378 struct net_device *rdma_ndev, void *cookie) 379 { 380 enum_netdev_default_gids(ib_dev, port, cookie, rdma_ndev); 381 _add_netdev_ips(ib_dev, port, cookie); 382 } 383 384 static void del_netdev_ips(struct ib_device *ib_dev, u8 port, 385 struct net_device *rdma_ndev, void *cookie) 386 { 387 ib_cache_gid_del_all_netdev_gids(ib_dev, port, cookie); 388 } 389 390 static void enum_all_gids_of_dev_cb(struct ib_device *ib_dev, 391 u8 port, 392 struct net_device *rdma_ndev, 393 void *cookie) 394 { 395 struct net *net; 396 struct net_device *ndev; 397 398 /* Lock the rtnl to make sure the netdevs does not move under 399 * our feet 400 */ 401 rtnl_lock(); 402 for_each_net(net) 403 for_each_netdev(net, ndev) 404 if (is_eth_port_of_netdev(ib_dev, port, rdma_ndev, ndev)) 405 add_netdev_ips(ib_dev, port, rdma_ndev, ndev); 406 rtnl_unlock(); 407 } 408 409 /* This function will rescan all of the network devices in the system 410 * and add their gids, as needed, to the relevant RoCE devices. */ 411 int roce_rescan_device(struct ib_device *ib_dev) 412 { 413 ib_enum_roce_netdev(ib_dev, pass_all_filter, NULL, 414 enum_all_gids_of_dev_cb, NULL); 415 416 return 0; 417 } 418 419 static void callback_for_addr_gid_device_scan(struct ib_device *device, 420 u8 port, 421 struct net_device *rdma_ndev, 422 void *cookie) 423 { 424 struct update_gid_event_work *parsed = cookie; 425 426 return update_gid(parsed->gid_op, device, 427 port, &parsed->gid, 428 &parsed->gid_attr); 429 } 430 431 struct upper_list { 432 struct list_head list; 433 struct net_device *upper; 434 }; 435 436 static int netdev_upper_walk(struct net_device *upper, void *data) 437 { 438 struct upper_list *entry = kmalloc(sizeof(*entry), GFP_ATOMIC); 439 struct list_head *upper_list = data; 440 441 if (!entry) 442 return 0; 443 444 list_add_tail(&entry->list, upper_list); 445 dev_hold(upper); 446 entry->upper = upper; 447 448 return 0; 449 } 450 451 static void handle_netdev_upper(struct ib_device *ib_dev, u8 port, 452 void *cookie, 453 void (*handle_netdev)(struct ib_device *ib_dev, 454 u8 port, 455 struct net_device *ndev)) 456 { 457 struct net_device *ndev = cookie; 458 struct upper_list *upper_iter; 459 struct upper_list *upper_temp; 460 LIST_HEAD(upper_list); 461 462 rcu_read_lock(); 463 netdev_walk_all_upper_dev_rcu(ndev, netdev_upper_walk, &upper_list); 464 rcu_read_unlock(); 465 466 handle_netdev(ib_dev, port, ndev); 467 list_for_each_entry_safe(upper_iter, upper_temp, &upper_list, 468 list) { 469 handle_netdev(ib_dev, port, upper_iter->upper); 470 dev_put(upper_iter->upper); 471 list_del(&upper_iter->list); 472 kfree(upper_iter); 473 } 474 } 475 476 static void _roce_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, 477 struct net_device *event_ndev) 478 { 479 ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev); 480 } 481 482 static void del_netdev_upper_ips(struct ib_device *ib_dev, u8 port, 483 struct net_device *rdma_ndev, void *cookie) 484 { 485 handle_netdev_upper(ib_dev, port, cookie, _roce_del_all_netdev_gids); 486 } 487 488 static void add_netdev_upper_ips(struct ib_device *ib_dev, u8 port, 489 struct net_device *rdma_ndev, void *cookie) 490 { 491 handle_netdev_upper(ib_dev, port, cookie, _add_netdev_ips); 492 } 493 494 static void del_netdev_default_ips_join(struct ib_device *ib_dev, u8 port, 495 struct net_device *rdma_ndev, 496 void *cookie) 497 { 498 struct net_device *master_ndev; 499 500 rcu_read_lock(); 501 master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev); 502 if (master_ndev) 503 dev_hold(master_ndev); 504 rcu_read_unlock(); 505 506 if (master_ndev) { 507 bond_delete_netdev_default_gids(ib_dev, port, master_ndev, 508 rdma_ndev); 509 dev_put(master_ndev); 510 } 511 } 512 513 static void del_netdev_default_ips(struct ib_device *ib_dev, u8 port, 514 struct net_device *rdma_ndev, void *cookie) 515 { 516 bond_delete_netdev_default_gids(ib_dev, port, cookie, rdma_ndev); 517 } 518 519 /* The following functions operate on all IB devices. netdevice_event and 520 * addr_event execute ib_enum_all_roce_netdevs through a work. 521 * ib_enum_all_roce_netdevs iterates through all IB devices. 522 */ 523 524 static void netdevice_event_work_handler(struct work_struct *_work) 525 { 526 struct netdev_event_work *work = 527 container_of(_work, struct netdev_event_work, work); 528 unsigned int i; 529 530 for (i = 0; i < ARRAY_SIZE(work->cmds) && work->cmds[i].cb; i++) { 531 ib_enum_all_roce_netdevs(work->cmds[i].filter, 532 work->cmds[i].filter_ndev, 533 work->cmds[i].cb, 534 work->cmds[i].ndev); 535 dev_put(work->cmds[i].ndev); 536 dev_put(work->cmds[i].filter_ndev); 537 } 538 539 kfree(work); 540 } 541 542 static int netdevice_queue_work(struct netdev_event_work_cmd *cmds, 543 struct net_device *ndev) 544 { 545 unsigned int i; 546 struct netdev_event_work *ndev_work = 547 kmalloc(sizeof(*ndev_work), GFP_KERNEL); 548 549 if (!ndev_work) 550 return NOTIFY_DONE; 551 552 memcpy(ndev_work->cmds, cmds, sizeof(ndev_work->cmds)); 553 for (i = 0; i < ARRAY_SIZE(ndev_work->cmds) && ndev_work->cmds[i].cb; i++) { 554 if (!ndev_work->cmds[i].ndev) 555 ndev_work->cmds[i].ndev = ndev; 556 if (!ndev_work->cmds[i].filter_ndev) 557 ndev_work->cmds[i].filter_ndev = ndev; 558 dev_hold(ndev_work->cmds[i].ndev); 559 dev_hold(ndev_work->cmds[i].filter_ndev); 560 } 561 INIT_WORK(&ndev_work->work, netdevice_event_work_handler); 562 563 queue_work(ib_wq, &ndev_work->work); 564 565 return NOTIFY_DONE; 566 } 567 568 static const struct netdev_event_work_cmd add_cmd = { 569 .cb = add_netdev_ips, .filter = is_eth_port_of_netdev}; 570 static const struct netdev_event_work_cmd add_cmd_upper_ips = { 571 .cb = add_netdev_upper_ips, .filter = is_eth_port_of_netdev}; 572 573 static void netdevice_event_changeupper(struct netdev_notifier_changeupper_info *changeupper_info, 574 struct netdev_event_work_cmd *cmds) 575 { 576 static const struct netdev_event_work_cmd upper_ips_del_cmd = { 577 .cb = del_netdev_upper_ips, .filter = upper_device_filter}; 578 static const struct netdev_event_work_cmd bonding_default_del_cmd = { 579 .cb = del_netdev_default_ips, .filter = is_eth_port_inactive_slave}; 580 581 if (changeupper_info->linking == false) { 582 cmds[0] = upper_ips_del_cmd; 583 cmds[0].ndev = changeupper_info->upper_dev; 584 cmds[1] = add_cmd; 585 } else { 586 cmds[0] = bonding_default_del_cmd; 587 cmds[0].ndev = changeupper_info->upper_dev; 588 cmds[1] = add_cmd_upper_ips; 589 cmds[1].ndev = changeupper_info->upper_dev; 590 cmds[1].filter_ndev = changeupper_info->upper_dev; 591 } 592 } 593 594 static int netdevice_event(struct notifier_block *this, unsigned long event, 595 void *ptr) 596 { 597 static const struct netdev_event_work_cmd del_cmd = { 598 .cb = del_netdev_ips, .filter = pass_all_filter}; 599 static const struct netdev_event_work_cmd bonding_default_del_cmd_join = { 600 .cb = del_netdev_default_ips_join, .filter = is_eth_port_inactive_slave}; 601 static const struct netdev_event_work_cmd default_del_cmd = { 602 .cb = del_netdev_default_ips, .filter = pass_all_filter}; 603 static const struct netdev_event_work_cmd bonding_event_ips_del_cmd = { 604 .cb = del_netdev_upper_ips, .filter = upper_device_filter}; 605 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 606 struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ] = { {NULL} }; 607 608 if (ndev->type != ARPHRD_ETHER) 609 return NOTIFY_DONE; 610 611 switch (event) { 612 case NETDEV_REGISTER: 613 case NETDEV_UP: 614 cmds[0] = bonding_default_del_cmd_join; 615 cmds[1] = add_cmd; 616 break; 617 618 case NETDEV_UNREGISTER: 619 if (ndev->reg_state < NETREG_UNREGISTERED) 620 cmds[0] = del_cmd; 621 else 622 return NOTIFY_DONE; 623 break; 624 625 case NETDEV_CHANGEADDR: 626 cmds[0] = default_del_cmd; 627 cmds[1] = add_cmd; 628 break; 629 630 case NETDEV_CHANGEUPPER: 631 netdevice_event_changeupper( 632 container_of(ptr, struct netdev_notifier_changeupper_info, info), 633 cmds); 634 break; 635 636 case NETDEV_BONDING_FAILOVER: 637 cmds[0] = bonding_event_ips_del_cmd; 638 cmds[1] = bonding_default_del_cmd_join; 639 cmds[2] = add_cmd_upper_ips; 640 break; 641 642 default: 643 return NOTIFY_DONE; 644 } 645 646 return netdevice_queue_work(cmds, ndev); 647 } 648 649 static void update_gid_event_work_handler(struct work_struct *_work) 650 { 651 struct update_gid_event_work *work = 652 container_of(_work, struct update_gid_event_work, work); 653 654 ib_enum_all_roce_netdevs(is_eth_port_of_netdev, work->gid_attr.ndev, 655 callback_for_addr_gid_device_scan, work); 656 657 dev_put(work->gid_attr.ndev); 658 kfree(work); 659 } 660 661 static int addr_event(struct notifier_block *this, unsigned long event, 662 struct sockaddr *sa, struct net_device *ndev) 663 { 664 struct update_gid_event_work *work; 665 enum gid_op_type gid_op; 666 667 if (ndev->type != ARPHRD_ETHER) 668 return NOTIFY_DONE; 669 670 switch (event) { 671 case NETDEV_UP: 672 gid_op = GID_ADD; 673 break; 674 675 case NETDEV_DOWN: 676 gid_op = GID_DEL; 677 break; 678 679 default: 680 return NOTIFY_DONE; 681 } 682 683 work = kmalloc(sizeof(*work), GFP_ATOMIC); 684 if (!work) 685 return NOTIFY_DONE; 686 687 INIT_WORK(&work->work, update_gid_event_work_handler); 688 689 rdma_ip2gid(sa, &work->gid); 690 work->gid_op = gid_op; 691 692 memset(&work->gid_attr, 0, sizeof(work->gid_attr)); 693 dev_hold(ndev); 694 work->gid_attr.ndev = ndev; 695 696 queue_work(ib_wq, &work->work); 697 698 return NOTIFY_DONE; 699 } 700 701 static int inetaddr_event(struct notifier_block *this, unsigned long event, 702 void *ptr) 703 { 704 struct sockaddr_in in; 705 struct net_device *ndev; 706 struct in_ifaddr *ifa = ptr; 707 708 in.sin_family = AF_INET; 709 in.sin_addr.s_addr = ifa->ifa_address; 710 ndev = ifa->ifa_dev->dev; 711 712 return addr_event(this, event, (struct sockaddr *)&in, ndev); 713 } 714 715 static int inet6addr_event(struct notifier_block *this, unsigned long event, 716 void *ptr) 717 { 718 struct sockaddr_in6 in6; 719 struct net_device *ndev; 720 struct inet6_ifaddr *ifa6 = ptr; 721 722 in6.sin6_family = AF_INET6; 723 in6.sin6_addr = ifa6->addr; 724 ndev = ifa6->idev->dev; 725 726 return addr_event(this, event, (struct sockaddr *)&in6, ndev); 727 } 728 729 static struct notifier_block nb_netdevice = { 730 .notifier_call = netdevice_event 731 }; 732 733 static struct notifier_block nb_inetaddr = { 734 .notifier_call = inetaddr_event 735 }; 736 737 static struct notifier_block nb_inet6addr = { 738 .notifier_call = inet6addr_event 739 }; 740 741 int __init roce_gid_mgmt_init(void) 742 { 743 register_inetaddr_notifier(&nb_inetaddr); 744 if (IS_ENABLED(CONFIG_IPV6)) 745 register_inet6addr_notifier(&nb_inet6addr); 746 /* We relay on the netdevice notifier to enumerate all 747 * existing devices in the system. Register to this notifier 748 * last to make sure we will not miss any IP add/del 749 * callbacks. 750 */ 751 register_netdevice_notifier(&nb_netdevice); 752 753 return 0; 754 } 755 756 void __exit roce_gid_mgmt_cleanup(void) 757 { 758 if (IS_ENABLED(CONFIG_IPV6)) 759 unregister_inet6addr_notifier(&nb_inet6addr); 760 unregister_inetaddr_notifier(&nb_inetaddr); 761 unregister_netdevice_notifier(&nb_netdevice); 762 /* Ensure all gid deletion tasks complete before we go down, 763 * to avoid any reference to free'd memory. By the time 764 * ib-core is removed, all physical devices have been removed, 765 * so no issue with remaining hardware contexts. 766 */ 767 } 768