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 static struct workqueue_struct *gid_cache_wq; 46 47 static struct workqueue_struct *gid_cache_wq; 48 49 enum gid_op_type { 50 GID_DEL = 0, 51 GID_ADD 52 }; 53 54 struct update_gid_event_work { 55 struct work_struct work; 56 union ib_gid gid; 57 struct ib_gid_attr gid_attr; 58 enum gid_op_type gid_op; 59 }; 60 61 #define ROCE_NETDEV_CALLBACK_SZ 3 62 struct netdev_event_work_cmd { 63 roce_netdev_callback cb; 64 roce_netdev_filter filter; 65 struct net_device *ndev; 66 struct net_device *filter_ndev; 67 }; 68 69 struct netdev_event_work { 70 struct work_struct work; 71 struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ]; 72 }; 73 74 static const struct { 75 bool (*is_supported)(const struct ib_device *device, u8 port_num); 76 enum ib_gid_type gid_type; 77 } PORT_CAP_TO_GID_TYPE[] = { 78 {rdma_protocol_roce_eth_encap, IB_GID_TYPE_ROCE}, 79 {rdma_protocol_roce_udp_encap, IB_GID_TYPE_ROCE_UDP_ENCAP}, 80 }; 81 82 #define CAP_TO_GID_TABLE_SIZE ARRAY_SIZE(PORT_CAP_TO_GID_TYPE) 83 84 unsigned long roce_gid_type_mask_support(struct ib_device *ib_dev, u8 port) 85 { 86 int i; 87 unsigned int ret_flags = 0; 88 89 if (!rdma_protocol_roce(ib_dev, port)) 90 return 1UL << IB_GID_TYPE_IB; 91 92 for (i = 0; i < CAP_TO_GID_TABLE_SIZE; i++) 93 if (PORT_CAP_TO_GID_TYPE[i].is_supported(ib_dev, port)) 94 ret_flags |= 1UL << PORT_CAP_TO_GID_TYPE[i].gid_type; 95 96 return ret_flags; 97 } 98 EXPORT_SYMBOL(roce_gid_type_mask_support); 99 100 static void update_gid(enum gid_op_type gid_op, struct ib_device *ib_dev, 101 u8 port, union ib_gid *gid, 102 struct ib_gid_attr *gid_attr) 103 { 104 int i; 105 unsigned long gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 106 107 for (i = 0; i < IB_GID_TYPE_SIZE; i++) { 108 if ((1UL << i) & gid_type_mask) { 109 gid_attr->gid_type = i; 110 switch (gid_op) { 111 case GID_ADD: 112 ib_cache_gid_add(ib_dev, port, 113 gid, gid_attr); 114 break; 115 case GID_DEL: 116 ib_cache_gid_del(ib_dev, port, 117 gid, gid_attr); 118 break; 119 } 120 } 121 } 122 } 123 124 enum bonding_slave_state { 125 BONDING_SLAVE_STATE_ACTIVE = 1UL << 0, 126 BONDING_SLAVE_STATE_INACTIVE = 1UL << 1, 127 /* No primary slave or the device isn't a slave in bonding */ 128 BONDING_SLAVE_STATE_NA = 1UL << 2, 129 }; 130 131 static enum bonding_slave_state is_eth_active_slave_of_bonding_rcu(struct net_device *dev, 132 struct net_device *upper) 133 { 134 if (upper && netif_is_bond_master(upper)) { 135 struct net_device *pdev = 136 bond_option_active_slave_get_rcu(netdev_priv(upper)); 137 138 if (pdev) 139 return dev == pdev ? BONDING_SLAVE_STATE_ACTIVE : 140 BONDING_SLAVE_STATE_INACTIVE; 141 } 142 143 return BONDING_SLAVE_STATE_NA; 144 } 145 146 #define REQUIRED_BOND_STATES (BONDING_SLAVE_STATE_ACTIVE | \ 147 BONDING_SLAVE_STATE_NA) 148 static int is_eth_port_of_netdev(struct ib_device *ib_dev, u8 port, 149 struct net_device *rdma_ndev, void *cookie) 150 { 151 struct net_device *real_dev; 152 int res; 153 154 if (!rdma_ndev) 155 return 0; 156 157 rcu_read_lock(); 158 real_dev = rdma_vlan_dev_real_dev(cookie); 159 if (!real_dev) 160 real_dev = cookie; 161 162 res = ((rdma_is_upper_dev_rcu(rdma_ndev, cookie) && 163 (is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) & 164 REQUIRED_BOND_STATES)) || 165 real_dev == rdma_ndev); 166 167 rcu_read_unlock(); 168 return res; 169 } 170 171 static int is_eth_port_inactive_slave(struct ib_device *ib_dev, u8 port, 172 struct net_device *rdma_ndev, void *cookie) 173 { 174 struct net_device *master_dev; 175 int res; 176 177 if (!rdma_ndev) 178 return 0; 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 static int pass_all_filter(struct ib_device *ib_dev, u8 port, 190 struct net_device *rdma_ndev, void *cookie) 191 { 192 return 1; 193 } 194 195 static int upper_device_filter(struct ib_device *ib_dev, u8 port, 196 struct net_device *rdma_ndev, void *cookie) 197 { 198 int res; 199 200 if (!rdma_ndev) 201 return 0; 202 203 if (rdma_ndev == cookie) 204 return 1; 205 206 rcu_read_lock(); 207 res = rdma_is_upper_dev_rcu(rdma_ndev, cookie); 208 rcu_read_unlock(); 209 210 return res; 211 } 212 213 static void update_gid_ip(enum gid_op_type gid_op, 214 struct ib_device *ib_dev, 215 u8 port, struct net_device *ndev, 216 struct sockaddr *addr) 217 { 218 union ib_gid gid; 219 struct ib_gid_attr gid_attr; 220 221 rdma_ip2gid(addr, &gid); 222 memset(&gid_attr, 0, sizeof(gid_attr)); 223 gid_attr.ndev = ndev; 224 225 update_gid(gid_op, ib_dev, port, &gid, &gid_attr); 226 } 227 228 static void enum_netdev_default_gids(struct ib_device *ib_dev, 229 u8 port, struct net_device *event_ndev, 230 struct net_device *rdma_ndev) 231 { 232 unsigned long gid_type_mask; 233 234 rcu_read_lock(); 235 if (!rdma_ndev || 236 ((rdma_ndev != event_ndev && 237 !rdma_is_upper_dev_rcu(rdma_ndev, event_ndev)) || 238 is_eth_active_slave_of_bonding_rcu(rdma_ndev, 239 netdev_master_upper_dev_get_rcu(rdma_ndev)) == 240 BONDING_SLAVE_STATE_INACTIVE)) { 241 rcu_read_unlock(); 242 return; 243 } 244 rcu_read_unlock(); 245 246 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 247 248 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, gid_type_mask, 249 IB_CACHE_GID_DEFAULT_MODE_SET); 250 } 251 252 static void bond_delete_netdev_default_gids(struct ib_device *ib_dev, 253 u8 port, 254 struct net_device *event_ndev, 255 struct net_device *rdma_ndev) 256 { 257 struct net_device *real_dev = rdma_vlan_dev_real_dev(event_ndev); 258 259 if (!rdma_ndev) 260 return; 261 262 if (!real_dev) 263 real_dev = event_ndev; 264 265 rcu_read_lock(); 266 267 if (rdma_is_upper_dev_rcu(rdma_ndev, event_ndev) && 268 is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) == 269 BONDING_SLAVE_STATE_INACTIVE) { 270 unsigned long gid_type_mask; 271 272 rcu_read_unlock(); 273 274 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 275 276 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, 277 gid_type_mask, 278 IB_CACHE_GID_DEFAULT_MODE_DELETE); 279 } else { 280 rcu_read_unlock(); 281 } 282 } 283 284 static void enum_netdev_ipv4_ips(struct ib_device *ib_dev, 285 u8 port, struct net_device *ndev) 286 { 287 struct in_device *in_dev; 288 struct sin_list { 289 struct list_head list; 290 struct sockaddr_in ip; 291 }; 292 struct sin_list *sin_iter; 293 struct sin_list *sin_temp; 294 295 LIST_HEAD(sin_list); 296 if (ndev->reg_state >= NETREG_UNREGISTERING) 297 return; 298 299 rcu_read_lock(); 300 in_dev = __in_dev_get_rcu(ndev); 301 if (!in_dev) { 302 rcu_read_unlock(); 303 return; 304 } 305 306 for_ifa(in_dev) { 307 struct sin_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC); 308 309 if (!entry) 310 continue; 311 312 entry->ip.sin_family = AF_INET; 313 entry->ip.sin_addr.s_addr = ifa->ifa_address; 314 list_add_tail(&entry->list, &sin_list); 315 } 316 endfor_ifa(in_dev); 317 rcu_read_unlock(); 318 319 list_for_each_entry_safe(sin_iter, sin_temp, &sin_list, list) { 320 update_gid_ip(GID_ADD, ib_dev, port, ndev, 321 (struct sockaddr *)&sin_iter->ip); 322 list_del(&sin_iter->list); 323 kfree(sin_iter); 324 } 325 } 326 327 static void enum_netdev_ipv6_ips(struct ib_device *ib_dev, 328 u8 port, struct net_device *ndev) 329 { 330 struct inet6_ifaddr *ifp; 331 struct inet6_dev *in6_dev; 332 struct sin6_list { 333 struct list_head list; 334 struct sockaddr_in6 sin6; 335 }; 336 struct sin6_list *sin6_iter; 337 struct sin6_list *sin6_temp; 338 struct ib_gid_attr gid_attr = {.ndev = ndev}; 339 LIST_HEAD(sin6_list); 340 341 if (ndev->reg_state >= NETREG_UNREGISTERING) 342 return; 343 344 in6_dev = in6_dev_get(ndev); 345 if (!in6_dev) 346 return; 347 348 read_lock_bh(&in6_dev->lock); 349 list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { 350 struct sin6_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC); 351 352 if (!entry) 353 continue; 354 355 entry->sin6.sin6_family = AF_INET6; 356 entry->sin6.sin6_addr = ifp->addr; 357 list_add_tail(&entry->list, &sin6_list); 358 } 359 read_unlock_bh(&in6_dev->lock); 360 361 in6_dev_put(in6_dev); 362 363 list_for_each_entry_safe(sin6_iter, sin6_temp, &sin6_list, list) { 364 union ib_gid gid; 365 366 rdma_ip2gid((struct sockaddr *)&sin6_iter->sin6, &gid); 367 update_gid(GID_ADD, ib_dev, port, &gid, &gid_attr); 368 list_del(&sin6_iter->list); 369 kfree(sin6_iter); 370 } 371 } 372 373 static void _add_netdev_ips(struct ib_device *ib_dev, u8 port, 374 struct net_device *ndev) 375 { 376 enum_netdev_ipv4_ips(ib_dev, port, ndev); 377 if (IS_ENABLED(CONFIG_IPV6)) 378 enum_netdev_ipv6_ips(ib_dev, port, ndev); 379 } 380 381 static void add_netdev_ips(struct ib_device *ib_dev, u8 port, 382 struct net_device *rdma_ndev, void *cookie) 383 { 384 enum_netdev_default_gids(ib_dev, port, cookie, rdma_ndev); 385 _add_netdev_ips(ib_dev, port, cookie); 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 ib_cache_gid_del_all_netdev_gids(ib_dev, port, cookie); 392 } 393 394 static void enum_all_gids_of_dev_cb(struct ib_device *ib_dev, 395 u8 port, 396 struct net_device *rdma_ndev, 397 void *cookie) 398 { 399 struct net *net; 400 struct net_device *ndev; 401 402 /* Lock the rtnl to make sure the netdevs does not move under 403 * our feet 404 */ 405 rtnl_lock(); 406 for_each_net(net) 407 for_each_netdev(net, ndev) 408 if (is_eth_port_of_netdev(ib_dev, port, rdma_ndev, ndev)) 409 add_netdev_ips(ib_dev, port, rdma_ndev, ndev); 410 rtnl_unlock(); 411 } 412 413 /* This function will rescan all of the network devices in the system 414 * and add their gids, as needed, to the relevant RoCE devices. */ 415 int roce_rescan_device(struct ib_device *ib_dev) 416 { 417 ib_enum_roce_netdev(ib_dev, pass_all_filter, NULL, 418 enum_all_gids_of_dev_cb, NULL); 419 420 return 0; 421 } 422 423 static void callback_for_addr_gid_device_scan(struct ib_device *device, 424 u8 port, 425 struct net_device *rdma_ndev, 426 void *cookie) 427 { 428 struct update_gid_event_work *parsed = cookie; 429 430 return update_gid(parsed->gid_op, device, 431 port, &parsed->gid, 432 &parsed->gid_attr); 433 } 434 435 struct upper_list { 436 struct list_head list; 437 struct net_device *upper; 438 }; 439 440 static int netdev_upper_walk(struct net_device *upper, void *data) 441 { 442 struct upper_list *entry = kmalloc(sizeof(*entry), GFP_ATOMIC); 443 struct list_head *upper_list = data; 444 445 if (!entry) 446 return 0; 447 448 list_add_tail(&entry->list, upper_list); 449 dev_hold(upper); 450 entry->upper = upper; 451 452 return 0; 453 } 454 455 static void handle_netdev_upper(struct ib_device *ib_dev, u8 port, 456 void *cookie, 457 void (*handle_netdev)(struct ib_device *ib_dev, 458 u8 port, 459 struct net_device *ndev)) 460 { 461 struct net_device *ndev = cookie; 462 struct upper_list *upper_iter; 463 struct upper_list *upper_temp; 464 LIST_HEAD(upper_list); 465 466 rcu_read_lock(); 467 netdev_walk_all_upper_dev_rcu(ndev, netdev_upper_walk, &upper_list); 468 rcu_read_unlock(); 469 470 handle_netdev(ib_dev, port, ndev); 471 list_for_each_entry_safe(upper_iter, upper_temp, &upper_list, 472 list) { 473 handle_netdev(ib_dev, port, upper_iter->upper); 474 dev_put(upper_iter->upper); 475 list_del(&upper_iter->list); 476 kfree(upper_iter); 477 } 478 } 479 480 static void _roce_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, 481 struct net_device *event_ndev) 482 { 483 ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev); 484 } 485 486 static void del_netdev_upper_ips(struct ib_device *ib_dev, u8 port, 487 struct net_device *rdma_ndev, void *cookie) 488 { 489 handle_netdev_upper(ib_dev, port, cookie, _roce_del_all_netdev_gids); 490 } 491 492 static void add_netdev_upper_ips(struct ib_device *ib_dev, u8 port, 493 struct net_device *rdma_ndev, void *cookie) 494 { 495 handle_netdev_upper(ib_dev, port, cookie, _add_netdev_ips); 496 } 497 498 static void del_netdev_default_ips_join(struct ib_device *ib_dev, u8 port, 499 struct net_device *rdma_ndev, 500 void *cookie) 501 { 502 struct net_device *master_ndev; 503 504 rcu_read_lock(); 505 master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev); 506 if (master_ndev) 507 dev_hold(master_ndev); 508 rcu_read_unlock(); 509 510 if (master_ndev) { 511 bond_delete_netdev_default_gids(ib_dev, port, master_ndev, 512 rdma_ndev); 513 dev_put(master_ndev); 514 } 515 } 516 517 static void del_netdev_default_ips(struct ib_device *ib_dev, u8 port, 518 struct net_device *rdma_ndev, void *cookie) 519 { 520 bond_delete_netdev_default_gids(ib_dev, port, cookie, rdma_ndev); 521 } 522 523 /* The following functions operate on all IB devices. netdevice_event and 524 * addr_event execute ib_enum_all_roce_netdevs through a work. 525 * ib_enum_all_roce_netdevs iterates through all IB devices. 526 */ 527 528 static void netdevice_event_work_handler(struct work_struct *_work) 529 { 530 struct netdev_event_work *work = 531 container_of(_work, struct netdev_event_work, work); 532 unsigned int i; 533 534 for (i = 0; i < ARRAY_SIZE(work->cmds) && work->cmds[i].cb; i++) { 535 ib_enum_all_roce_netdevs(work->cmds[i].filter, 536 work->cmds[i].filter_ndev, 537 work->cmds[i].cb, 538 work->cmds[i].ndev); 539 dev_put(work->cmds[i].ndev); 540 dev_put(work->cmds[i].filter_ndev); 541 } 542 543 kfree(work); 544 } 545 546 static int netdevice_queue_work(struct netdev_event_work_cmd *cmds, 547 struct net_device *ndev) 548 { 549 unsigned int i; 550 struct netdev_event_work *ndev_work = 551 kmalloc(sizeof(*ndev_work), GFP_KERNEL); 552 553 if (!ndev_work) 554 return NOTIFY_DONE; 555 556 memcpy(ndev_work->cmds, cmds, sizeof(ndev_work->cmds)); 557 for (i = 0; i < ARRAY_SIZE(ndev_work->cmds) && ndev_work->cmds[i].cb; i++) { 558 if (!ndev_work->cmds[i].ndev) 559 ndev_work->cmds[i].ndev = ndev; 560 if (!ndev_work->cmds[i].filter_ndev) 561 ndev_work->cmds[i].filter_ndev = ndev; 562 dev_hold(ndev_work->cmds[i].ndev); 563 dev_hold(ndev_work->cmds[i].filter_ndev); 564 } 565 INIT_WORK(&ndev_work->work, netdevice_event_work_handler); 566 567 queue_work(gid_cache_wq, &ndev_work->work); 568 569 return NOTIFY_DONE; 570 } 571 572 static const struct netdev_event_work_cmd add_cmd = { 573 .cb = add_netdev_ips, .filter = is_eth_port_of_netdev}; 574 static const struct netdev_event_work_cmd add_cmd_upper_ips = { 575 .cb = add_netdev_upper_ips, .filter = is_eth_port_of_netdev}; 576 577 static void netdevice_event_changeupper(struct netdev_notifier_changeupper_info *changeupper_info, 578 struct netdev_event_work_cmd *cmds) 579 { 580 static const struct netdev_event_work_cmd upper_ips_del_cmd = { 581 .cb = del_netdev_upper_ips, .filter = upper_device_filter}; 582 static const struct netdev_event_work_cmd bonding_default_del_cmd = { 583 .cb = del_netdev_default_ips, .filter = is_eth_port_inactive_slave}; 584 585 if (changeupper_info->linking == false) { 586 cmds[0] = upper_ips_del_cmd; 587 cmds[0].ndev = changeupper_info->upper_dev; 588 cmds[1] = add_cmd; 589 } else { 590 cmds[0] = bonding_default_del_cmd; 591 cmds[0].ndev = changeupper_info->upper_dev; 592 cmds[1] = add_cmd_upper_ips; 593 cmds[1].ndev = changeupper_info->upper_dev; 594 cmds[1].filter_ndev = changeupper_info->upper_dev; 595 } 596 } 597 598 static int netdevice_event(struct notifier_block *this, unsigned long event, 599 void *ptr) 600 { 601 static const struct netdev_event_work_cmd del_cmd = { 602 .cb = del_netdev_ips, .filter = pass_all_filter}; 603 static const struct netdev_event_work_cmd bonding_default_del_cmd_join = { 604 .cb = del_netdev_default_ips_join, .filter = is_eth_port_inactive_slave}; 605 static const struct netdev_event_work_cmd default_del_cmd = { 606 .cb = del_netdev_default_ips, .filter = pass_all_filter}; 607 static const struct netdev_event_work_cmd bonding_event_ips_del_cmd = { 608 .cb = del_netdev_upper_ips, .filter = upper_device_filter}; 609 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 610 struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ] = { {NULL} }; 611 612 if (ndev->type != ARPHRD_ETHER) 613 return NOTIFY_DONE; 614 615 switch (event) { 616 case NETDEV_REGISTER: 617 case NETDEV_UP: 618 cmds[0] = bonding_default_del_cmd_join; 619 cmds[1] = add_cmd; 620 break; 621 622 case NETDEV_UNREGISTER: 623 if (ndev->reg_state < NETREG_UNREGISTERED) 624 cmds[0] = del_cmd; 625 else 626 return NOTIFY_DONE; 627 break; 628 629 case NETDEV_CHANGEADDR: 630 cmds[0] = default_del_cmd; 631 cmds[1] = add_cmd; 632 break; 633 634 case NETDEV_CHANGEUPPER: 635 netdevice_event_changeupper( 636 container_of(ptr, struct netdev_notifier_changeupper_info, info), 637 cmds); 638 break; 639 640 case NETDEV_BONDING_FAILOVER: 641 cmds[0] = bonding_event_ips_del_cmd; 642 cmds[1] = bonding_default_del_cmd_join; 643 cmds[2] = add_cmd_upper_ips; 644 break; 645 646 default: 647 return NOTIFY_DONE; 648 } 649 650 return netdevice_queue_work(cmds, ndev); 651 } 652 653 static void update_gid_event_work_handler(struct work_struct *_work) 654 { 655 struct update_gid_event_work *work = 656 container_of(_work, struct update_gid_event_work, work); 657 658 ib_enum_all_roce_netdevs(is_eth_port_of_netdev, work->gid_attr.ndev, 659 callback_for_addr_gid_device_scan, work); 660 661 dev_put(work->gid_attr.ndev); 662 kfree(work); 663 } 664 665 static int addr_event(struct notifier_block *this, unsigned long event, 666 struct sockaddr *sa, struct net_device *ndev) 667 { 668 struct update_gid_event_work *work; 669 enum gid_op_type gid_op; 670 671 if (ndev->type != ARPHRD_ETHER) 672 return NOTIFY_DONE; 673 674 switch (event) { 675 case NETDEV_UP: 676 gid_op = GID_ADD; 677 break; 678 679 case NETDEV_DOWN: 680 gid_op = GID_DEL; 681 break; 682 683 default: 684 return NOTIFY_DONE; 685 } 686 687 work = kmalloc(sizeof(*work), GFP_ATOMIC); 688 if (!work) 689 return NOTIFY_DONE; 690 691 INIT_WORK(&work->work, update_gid_event_work_handler); 692 693 rdma_ip2gid(sa, &work->gid); 694 work->gid_op = gid_op; 695 696 memset(&work->gid_attr, 0, sizeof(work->gid_attr)); 697 dev_hold(ndev); 698 work->gid_attr.ndev = ndev; 699 700 queue_work(gid_cache_wq, &work->work); 701 702 return NOTIFY_DONE; 703 } 704 705 static int inetaddr_event(struct notifier_block *this, unsigned long event, 706 void *ptr) 707 { 708 struct sockaddr_in in; 709 struct net_device *ndev; 710 struct in_ifaddr *ifa = ptr; 711 712 in.sin_family = AF_INET; 713 in.sin_addr.s_addr = ifa->ifa_address; 714 ndev = ifa->ifa_dev->dev; 715 716 return addr_event(this, event, (struct sockaddr *)&in, ndev); 717 } 718 719 static int inet6addr_event(struct notifier_block *this, unsigned long event, 720 void *ptr) 721 { 722 struct sockaddr_in6 in6; 723 struct net_device *ndev; 724 struct inet6_ifaddr *ifa6 = ptr; 725 726 in6.sin6_family = AF_INET6; 727 in6.sin6_addr = ifa6->addr; 728 ndev = ifa6->idev->dev; 729 730 return addr_event(this, event, (struct sockaddr *)&in6, ndev); 731 } 732 733 static struct notifier_block nb_netdevice = { 734 .notifier_call = netdevice_event 735 }; 736 737 static struct notifier_block nb_inetaddr = { 738 .notifier_call = inetaddr_event 739 }; 740 741 static struct notifier_block nb_inet6addr = { 742 .notifier_call = inet6addr_event 743 }; 744 745 int __init roce_gid_mgmt_init(void) 746 { 747 gid_cache_wq = alloc_ordered_workqueue("gid-cache-wq", 0); 748 if (!gid_cache_wq) 749 return -ENOMEM; 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 destroy_workqueue(gid_cache_wq); 776 } 777