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 *event_ndev = (struct net_device *)cookie; 148 struct net_device *real_dev; 149 int res; 150 151 if (!rdma_ndev) 152 return 0; 153 154 rcu_read_lock(); 155 real_dev = rdma_vlan_dev_real_dev(event_ndev); 156 if (!real_dev) 157 real_dev = event_ndev; 158 159 res = ((rdma_is_upper_dev_rcu(rdma_ndev, event_ndev) && 160 (is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) & 161 REQUIRED_BOND_STATES)) || 162 real_dev == rdma_ndev); 163 164 rcu_read_unlock(); 165 return res; 166 } 167 168 static int is_eth_port_inactive_slave(struct ib_device *ib_dev, u8 port, 169 struct net_device *rdma_ndev, void *cookie) 170 { 171 struct net_device *master_dev; 172 int res; 173 174 if (!rdma_ndev) 175 return 0; 176 177 rcu_read_lock(); 178 master_dev = netdev_master_upper_dev_get_rcu(rdma_ndev); 179 res = is_eth_active_slave_of_bonding_rcu(rdma_ndev, master_dev) == 180 BONDING_SLAVE_STATE_INACTIVE; 181 rcu_read_unlock(); 182 183 return res; 184 } 185 186 static int pass_all_filter(struct ib_device *ib_dev, u8 port, 187 struct net_device *rdma_ndev, void *cookie) 188 { 189 return 1; 190 } 191 192 static int upper_device_filter(struct ib_device *ib_dev, u8 port, 193 struct net_device *rdma_ndev, void *cookie) 194 { 195 struct net_device *event_ndev = (struct net_device *)cookie; 196 int res; 197 198 if (!rdma_ndev) 199 return 0; 200 201 if (rdma_ndev == event_ndev) 202 return 1; 203 204 rcu_read_lock(); 205 res = rdma_is_upper_dev_rcu(rdma_ndev, event_ndev); 206 rcu_read_unlock(); 207 208 return res; 209 } 210 211 static void update_gid_ip(enum gid_op_type gid_op, 212 struct ib_device *ib_dev, 213 u8 port, struct net_device *ndev, 214 struct sockaddr *addr) 215 { 216 union ib_gid gid; 217 struct ib_gid_attr gid_attr; 218 219 rdma_ip2gid(addr, &gid); 220 memset(&gid_attr, 0, sizeof(gid_attr)); 221 gid_attr.ndev = ndev; 222 223 update_gid(gid_op, ib_dev, port, &gid, &gid_attr); 224 } 225 226 static void enum_netdev_default_gids(struct ib_device *ib_dev, 227 u8 port, struct net_device *event_ndev, 228 struct net_device *rdma_ndev) 229 { 230 unsigned long gid_type_mask; 231 232 rcu_read_lock(); 233 if (!rdma_ndev || 234 ((rdma_ndev != event_ndev && 235 !rdma_is_upper_dev_rcu(rdma_ndev, event_ndev)) || 236 is_eth_active_slave_of_bonding_rcu(rdma_ndev, 237 netdev_master_upper_dev_get_rcu(rdma_ndev)) == 238 BONDING_SLAVE_STATE_INACTIVE)) { 239 rcu_read_unlock(); 240 return; 241 } 242 rcu_read_unlock(); 243 244 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 245 246 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, gid_type_mask, 247 IB_CACHE_GID_DEFAULT_MODE_SET); 248 } 249 250 static void bond_delete_netdev_default_gids(struct ib_device *ib_dev, 251 u8 port, 252 struct net_device *event_ndev, 253 struct net_device *rdma_ndev) 254 { 255 struct net_device *real_dev = rdma_vlan_dev_real_dev(event_ndev); 256 257 if (!rdma_ndev) 258 return; 259 260 if (!real_dev) 261 real_dev = event_ndev; 262 263 rcu_read_lock(); 264 265 if (rdma_is_upper_dev_rcu(rdma_ndev, event_ndev) && 266 is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) == 267 BONDING_SLAVE_STATE_INACTIVE) { 268 unsigned long gid_type_mask; 269 270 rcu_read_unlock(); 271 272 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 273 274 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, 275 gid_type_mask, 276 IB_CACHE_GID_DEFAULT_MODE_DELETE); 277 } else { 278 rcu_read_unlock(); 279 } 280 } 281 282 static void enum_netdev_ipv4_ips(struct ib_device *ib_dev, 283 u8 port, struct net_device *ndev) 284 { 285 struct in_device *in_dev; 286 struct sin_list { 287 struct list_head list; 288 struct sockaddr_in ip; 289 }; 290 struct sin_list *sin_iter; 291 struct sin_list *sin_temp; 292 293 LIST_HEAD(sin_list); 294 if (ndev->reg_state >= NETREG_UNREGISTERING) 295 return; 296 297 rcu_read_lock(); 298 in_dev = __in_dev_get_rcu(ndev); 299 if (!in_dev) { 300 rcu_read_unlock(); 301 return; 302 } 303 304 for_ifa(in_dev) { 305 struct sin_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC); 306 307 if (!entry) 308 continue; 309 310 entry->ip.sin_family = AF_INET; 311 entry->ip.sin_addr.s_addr = ifa->ifa_address; 312 list_add_tail(&entry->list, &sin_list); 313 } 314 endfor_ifa(in_dev); 315 rcu_read_unlock(); 316 317 list_for_each_entry_safe(sin_iter, sin_temp, &sin_list, list) { 318 update_gid_ip(GID_ADD, ib_dev, port, ndev, 319 (struct sockaddr *)&sin_iter->ip); 320 list_del(&sin_iter->list); 321 kfree(sin_iter); 322 } 323 } 324 325 static void enum_netdev_ipv6_ips(struct ib_device *ib_dev, 326 u8 port, struct net_device *ndev) 327 { 328 struct inet6_ifaddr *ifp; 329 struct inet6_dev *in6_dev; 330 struct sin6_list { 331 struct list_head list; 332 struct sockaddr_in6 sin6; 333 }; 334 struct sin6_list *sin6_iter; 335 struct sin6_list *sin6_temp; 336 struct ib_gid_attr gid_attr = {.ndev = ndev}; 337 LIST_HEAD(sin6_list); 338 339 if (ndev->reg_state >= NETREG_UNREGISTERING) 340 return; 341 342 in6_dev = in6_dev_get(ndev); 343 if (!in6_dev) 344 return; 345 346 read_lock_bh(&in6_dev->lock); 347 list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { 348 struct sin6_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC); 349 350 if (!entry) 351 continue; 352 353 entry->sin6.sin6_family = AF_INET6; 354 entry->sin6.sin6_addr = ifp->addr; 355 list_add_tail(&entry->list, &sin6_list); 356 } 357 read_unlock_bh(&in6_dev->lock); 358 359 in6_dev_put(in6_dev); 360 361 list_for_each_entry_safe(sin6_iter, sin6_temp, &sin6_list, list) { 362 union ib_gid gid; 363 364 rdma_ip2gid((struct sockaddr *)&sin6_iter->sin6, &gid); 365 update_gid(GID_ADD, ib_dev, port, &gid, &gid_attr); 366 list_del(&sin6_iter->list); 367 kfree(sin6_iter); 368 } 369 } 370 371 static void _add_netdev_ips(struct ib_device *ib_dev, u8 port, 372 struct net_device *ndev) 373 { 374 enum_netdev_ipv4_ips(ib_dev, port, ndev); 375 if (IS_ENABLED(CONFIG_IPV6)) 376 enum_netdev_ipv6_ips(ib_dev, port, ndev); 377 } 378 379 static void add_netdev_ips(struct ib_device *ib_dev, u8 port, 380 struct net_device *rdma_ndev, void *cookie) 381 { 382 struct net_device *event_ndev = (struct net_device *)cookie; 383 384 enum_netdev_default_gids(ib_dev, port, event_ndev, rdma_ndev); 385 _add_netdev_ips(ib_dev, port, event_ndev); 386 } 387 388 static void del_netdev_ips(struct ib_device *ib_dev, u8 port, 389 struct net_device *rdma_ndev, void *cookie) 390 { 391 struct net_device *event_ndev = (struct net_device *)cookie; 392 393 ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev); 394 } 395 396 static void enum_all_gids_of_dev_cb(struct ib_device *ib_dev, 397 u8 port, 398 struct net_device *rdma_ndev, 399 void *cookie) 400 { 401 struct net *net; 402 struct net_device *ndev; 403 404 /* Lock the rtnl to make sure the netdevs does not move under 405 * our feet 406 */ 407 rtnl_lock(); 408 for_each_net(net) 409 for_each_netdev(net, ndev) 410 if (is_eth_port_of_netdev(ib_dev, port, rdma_ndev, ndev)) 411 add_netdev_ips(ib_dev, port, rdma_ndev, ndev); 412 rtnl_unlock(); 413 } 414 415 /* This function will rescan all of the network devices in the system 416 * and add their gids, as needed, to the relevant RoCE devices. */ 417 int roce_rescan_device(struct ib_device *ib_dev) 418 { 419 ib_enum_roce_netdev(ib_dev, pass_all_filter, NULL, 420 enum_all_gids_of_dev_cb, NULL); 421 422 return 0; 423 } 424 425 static void callback_for_addr_gid_device_scan(struct ib_device *device, 426 u8 port, 427 struct net_device *rdma_ndev, 428 void *cookie) 429 { 430 struct update_gid_event_work *parsed = cookie; 431 432 return update_gid(parsed->gid_op, device, 433 port, &parsed->gid, 434 &parsed->gid_attr); 435 } 436 437 struct upper_list { 438 struct list_head list; 439 struct net_device *upper; 440 }; 441 442 static int netdev_upper_walk(struct net_device *upper, void *data) 443 { 444 struct upper_list *entry = kmalloc(sizeof(*entry), GFP_ATOMIC); 445 struct list_head *upper_list = data; 446 447 if (!entry) 448 return 0; 449 450 list_add_tail(&entry->list, upper_list); 451 dev_hold(upper); 452 entry->upper = upper; 453 454 return 0; 455 } 456 457 static void handle_netdev_upper(struct ib_device *ib_dev, u8 port, 458 void *cookie, 459 void (*handle_netdev)(struct ib_device *ib_dev, 460 u8 port, 461 struct net_device *ndev)) 462 { 463 struct net_device *ndev = (struct net_device *)cookie; 464 struct upper_list *upper_iter; 465 struct upper_list *upper_temp; 466 LIST_HEAD(upper_list); 467 468 rcu_read_lock(); 469 netdev_walk_all_upper_dev_rcu(ndev, netdev_upper_walk, &upper_list); 470 rcu_read_unlock(); 471 472 handle_netdev(ib_dev, port, ndev); 473 list_for_each_entry_safe(upper_iter, upper_temp, &upper_list, 474 list) { 475 handle_netdev(ib_dev, port, upper_iter->upper); 476 dev_put(upper_iter->upper); 477 list_del(&upper_iter->list); 478 kfree(upper_iter); 479 } 480 } 481 482 static void _roce_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, 483 struct net_device *event_ndev) 484 { 485 ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev); 486 } 487 488 static void del_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, _roce_del_all_netdev_gids); 492 } 493 494 static void add_netdev_upper_ips(struct ib_device *ib_dev, u8 port, 495 struct net_device *rdma_ndev, void *cookie) 496 { 497 handle_netdev_upper(ib_dev, port, cookie, _add_netdev_ips); 498 } 499 500 static void del_netdev_default_ips_join(struct ib_device *ib_dev, u8 port, 501 struct net_device *rdma_ndev, 502 void *cookie) 503 { 504 struct net_device *master_ndev; 505 506 rcu_read_lock(); 507 master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev); 508 if (master_ndev) 509 dev_hold(master_ndev); 510 rcu_read_unlock(); 511 512 if (master_ndev) { 513 bond_delete_netdev_default_gids(ib_dev, port, master_ndev, 514 rdma_ndev); 515 dev_put(master_ndev); 516 } 517 } 518 519 static void del_netdev_default_ips(struct ib_device *ib_dev, u8 port, 520 struct net_device *rdma_ndev, void *cookie) 521 { 522 struct net_device *event_ndev = (struct net_device *)cookie; 523 524 bond_delete_netdev_default_gids(ib_dev, port, event_ndev, rdma_ndev); 525 } 526 527 /* The following functions operate on all IB devices. netdevice_event and 528 * addr_event execute ib_enum_all_roce_netdevs through a work. 529 * ib_enum_all_roce_netdevs iterates through all IB devices. 530 */ 531 532 static void netdevice_event_work_handler(struct work_struct *_work) 533 { 534 struct netdev_event_work *work = 535 container_of(_work, struct netdev_event_work, work); 536 unsigned int i; 537 538 for (i = 0; i < ARRAY_SIZE(work->cmds) && work->cmds[i].cb; i++) { 539 ib_enum_all_roce_netdevs(work->cmds[i].filter, 540 work->cmds[i].filter_ndev, 541 work->cmds[i].cb, 542 work->cmds[i].ndev); 543 dev_put(work->cmds[i].ndev); 544 dev_put(work->cmds[i].filter_ndev); 545 } 546 547 kfree(work); 548 } 549 550 static int netdevice_queue_work(struct netdev_event_work_cmd *cmds, 551 struct net_device *ndev) 552 { 553 unsigned int i; 554 struct netdev_event_work *ndev_work = 555 kmalloc(sizeof(*ndev_work), GFP_KERNEL); 556 557 if (!ndev_work) 558 return NOTIFY_DONE; 559 560 memcpy(ndev_work->cmds, cmds, sizeof(ndev_work->cmds)); 561 for (i = 0; i < ARRAY_SIZE(ndev_work->cmds) && ndev_work->cmds[i].cb; i++) { 562 if (!ndev_work->cmds[i].ndev) 563 ndev_work->cmds[i].ndev = ndev; 564 if (!ndev_work->cmds[i].filter_ndev) 565 ndev_work->cmds[i].filter_ndev = ndev; 566 dev_hold(ndev_work->cmds[i].ndev); 567 dev_hold(ndev_work->cmds[i].filter_ndev); 568 } 569 INIT_WORK(&ndev_work->work, netdevice_event_work_handler); 570 571 queue_work(ib_wq, &ndev_work->work); 572 573 return NOTIFY_DONE; 574 } 575 576 static const struct netdev_event_work_cmd add_cmd = { 577 .cb = add_netdev_ips, .filter = is_eth_port_of_netdev}; 578 static const struct netdev_event_work_cmd add_cmd_upper_ips = { 579 .cb = add_netdev_upper_ips, .filter = is_eth_port_of_netdev}; 580 581 static void netdevice_event_changeupper(struct netdev_notifier_changeupper_info *changeupper_info, 582 struct netdev_event_work_cmd *cmds) 583 { 584 static const struct netdev_event_work_cmd upper_ips_del_cmd = { 585 .cb = del_netdev_upper_ips, .filter = upper_device_filter}; 586 static const struct netdev_event_work_cmd bonding_default_del_cmd = { 587 .cb = del_netdev_default_ips, .filter = is_eth_port_inactive_slave}; 588 589 if (changeupper_info->linking == false) { 590 cmds[0] = upper_ips_del_cmd; 591 cmds[0].ndev = changeupper_info->upper_dev; 592 cmds[1] = add_cmd; 593 } else { 594 cmds[0] = bonding_default_del_cmd; 595 cmds[0].ndev = changeupper_info->upper_dev; 596 cmds[1] = add_cmd_upper_ips; 597 cmds[1].ndev = changeupper_info->upper_dev; 598 cmds[1].filter_ndev = changeupper_info->upper_dev; 599 } 600 } 601 602 static int netdevice_event(struct notifier_block *this, unsigned long event, 603 void *ptr) 604 { 605 static const struct netdev_event_work_cmd del_cmd = { 606 .cb = del_netdev_ips, .filter = pass_all_filter}; 607 static const struct netdev_event_work_cmd bonding_default_del_cmd_join = { 608 .cb = del_netdev_default_ips_join, .filter = is_eth_port_inactive_slave}; 609 static const struct netdev_event_work_cmd default_del_cmd = { 610 .cb = del_netdev_default_ips, .filter = pass_all_filter}; 611 static const struct netdev_event_work_cmd bonding_event_ips_del_cmd = { 612 .cb = del_netdev_upper_ips, .filter = upper_device_filter}; 613 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 614 struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ] = { {NULL} }; 615 616 if (ndev->type != ARPHRD_ETHER) 617 return NOTIFY_DONE; 618 619 switch (event) { 620 case NETDEV_REGISTER: 621 case NETDEV_UP: 622 cmds[0] = bonding_default_del_cmd_join; 623 cmds[1] = add_cmd; 624 break; 625 626 case NETDEV_UNREGISTER: 627 if (ndev->reg_state < NETREG_UNREGISTERED) 628 cmds[0] = del_cmd; 629 else 630 return NOTIFY_DONE; 631 break; 632 633 case NETDEV_CHANGEADDR: 634 cmds[0] = default_del_cmd; 635 cmds[1] = add_cmd; 636 break; 637 638 case NETDEV_CHANGEUPPER: 639 netdevice_event_changeupper( 640 container_of(ptr, struct netdev_notifier_changeupper_info, info), 641 cmds); 642 break; 643 644 case NETDEV_BONDING_FAILOVER: 645 cmds[0] = bonding_event_ips_del_cmd; 646 cmds[1] = bonding_default_del_cmd_join; 647 cmds[2] = add_cmd_upper_ips; 648 break; 649 650 default: 651 return NOTIFY_DONE; 652 } 653 654 return netdevice_queue_work(cmds, ndev); 655 } 656 657 static void update_gid_event_work_handler(struct work_struct *_work) 658 { 659 struct update_gid_event_work *work = 660 container_of(_work, struct update_gid_event_work, work); 661 662 ib_enum_all_roce_netdevs(is_eth_port_of_netdev, work->gid_attr.ndev, 663 callback_for_addr_gid_device_scan, work); 664 665 dev_put(work->gid_attr.ndev); 666 kfree(work); 667 } 668 669 static int addr_event(struct notifier_block *this, unsigned long event, 670 struct sockaddr *sa, struct net_device *ndev) 671 { 672 struct update_gid_event_work *work; 673 enum gid_op_type gid_op; 674 675 if (ndev->type != ARPHRD_ETHER) 676 return NOTIFY_DONE; 677 678 switch (event) { 679 case NETDEV_UP: 680 gid_op = GID_ADD; 681 break; 682 683 case NETDEV_DOWN: 684 gid_op = GID_DEL; 685 break; 686 687 default: 688 return NOTIFY_DONE; 689 } 690 691 work = kmalloc(sizeof(*work), GFP_ATOMIC); 692 if (!work) 693 return NOTIFY_DONE; 694 695 INIT_WORK(&work->work, update_gid_event_work_handler); 696 697 rdma_ip2gid(sa, &work->gid); 698 work->gid_op = gid_op; 699 700 memset(&work->gid_attr, 0, sizeof(work->gid_attr)); 701 dev_hold(ndev); 702 work->gid_attr.ndev = ndev; 703 704 queue_work(ib_wq, &work->work); 705 706 return NOTIFY_DONE; 707 } 708 709 static int inetaddr_event(struct notifier_block *this, unsigned long event, 710 void *ptr) 711 { 712 struct sockaddr_in in; 713 struct net_device *ndev; 714 struct in_ifaddr *ifa = ptr; 715 716 in.sin_family = AF_INET; 717 in.sin_addr.s_addr = ifa->ifa_address; 718 ndev = ifa->ifa_dev->dev; 719 720 return addr_event(this, event, (struct sockaddr *)&in, ndev); 721 } 722 723 static int inet6addr_event(struct notifier_block *this, unsigned long event, 724 void *ptr) 725 { 726 struct sockaddr_in6 in6; 727 struct net_device *ndev; 728 struct inet6_ifaddr *ifa6 = ptr; 729 730 in6.sin6_family = AF_INET6; 731 in6.sin6_addr = ifa6->addr; 732 ndev = ifa6->idev->dev; 733 734 return addr_event(this, event, (struct sockaddr *)&in6, ndev); 735 } 736 737 static struct notifier_block nb_netdevice = { 738 .notifier_call = netdevice_event 739 }; 740 741 static struct notifier_block nb_inetaddr = { 742 .notifier_call = inetaddr_event 743 }; 744 745 static struct notifier_block nb_inet6addr = { 746 .notifier_call = inet6addr_event 747 }; 748 749 int __init roce_gid_mgmt_init(void) 750 { 751 register_inetaddr_notifier(&nb_inetaddr); 752 if (IS_ENABLED(CONFIG_IPV6)) 753 register_inet6addr_notifier(&nb_inet6addr); 754 /* We relay on the netdevice notifier to enumerate all 755 * existing devices in the system. Register to this notifier 756 * last to make sure we will not miss any IP add/del 757 * callbacks. 758 */ 759 register_netdevice_notifier(&nb_netdevice); 760 761 return 0; 762 } 763 764 void __exit roce_gid_mgmt_cleanup(void) 765 { 766 if (IS_ENABLED(CONFIG_IPV6)) 767 unregister_inet6addr_notifier(&nb_inet6addr); 768 unregister_inetaddr_notifier(&nb_inetaddr); 769 unregister_netdevice_notifier(&nb_netdevice); 770 /* Ensure all gid deletion tasks complete before we go down, 771 * to avoid any reference to free'd memory. By the time 772 * ib-core is removed, all physical devices have been removed, 773 * so no issue with remaining hardware contexts. 774 */ 775 } 776