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 enum gid_op_type { 48 GID_DEL = 0, 49 GID_ADD 50 }; 51 52 struct 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 60 struct 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 67 struct netdev_event_work { 68 struct work_struct work; 69 struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ]; 70 }; 71 72 static const struct { 73 bool (*is_supported)(const struct ib_device *device, u8 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 82 unsigned long roce_gid_type_mask_support(struct ib_device *ib_dev, u8 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 } 96 EXPORT_SYMBOL(roce_gid_type_mask_support); 97 98 static void update_gid(enum gid_op_type gid_op, struct ib_device *ib_dev, 99 u8 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 } 121 122 enum 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 }; 128 129 static 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) 146 static int is_eth_port_of_netdev(struct ib_device *ib_dev, u8 port, 147 struct net_device *rdma_ndev, void *cookie) 148 { 149 struct net_device *real_dev; 150 int res; 151 152 if (!rdma_ndev) 153 return 0; 154 155 rcu_read_lock(); 156 real_dev = rdma_vlan_dev_real_dev(cookie); 157 if (!real_dev) 158 real_dev = cookie; 159 160 res = ((rdma_is_upper_dev_rcu(rdma_ndev, cookie) && 161 (is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) & 162 REQUIRED_BOND_STATES)) || 163 real_dev == rdma_ndev); 164 165 rcu_read_unlock(); 166 return res; 167 } 168 169 static int is_eth_port_inactive_slave(struct ib_device *ib_dev, u8 port, 170 struct net_device *rdma_ndev, void *cookie) 171 { 172 struct net_device *master_dev; 173 int res; 174 175 if (!rdma_ndev) 176 return 0; 177 178 rcu_read_lock(); 179 master_dev = netdev_master_upper_dev_get_rcu(rdma_ndev); 180 res = is_eth_active_slave_of_bonding_rcu(rdma_ndev, master_dev) == 181 BONDING_SLAVE_STATE_INACTIVE; 182 rcu_read_unlock(); 183 184 return res; 185 } 186 187 static int pass_all_filter(struct ib_device *ib_dev, u8 port, 188 struct net_device *rdma_ndev, void *cookie) 189 { 190 return 1; 191 } 192 193 static int upper_device_filter(struct ib_device *ib_dev, u8 port, 194 struct net_device *rdma_ndev, void *cookie) 195 { 196 int res; 197 198 if (!rdma_ndev) 199 return 0; 200 201 if (rdma_ndev == cookie) 202 return 1; 203 204 rcu_read_lock(); 205 res = rdma_is_upper_dev_rcu(rdma_ndev, cookie); 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 unsigned long gid_type_mask; 257 258 if (!rdma_ndev) 259 return; 260 261 if (!real_dev) 262 real_dev = event_ndev; 263 264 rcu_read_lock(); 265 266 if (((rdma_ndev != event_ndev && 267 !rdma_is_upper_dev_rcu(rdma_ndev, event_ndev)) || 268 is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) 269 == 270 BONDING_SLAVE_STATE_INACTIVE)) { 271 rcu_read_unlock(); 272 return; 273 } 274 275 rcu_read_unlock(); 276 277 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 278 279 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, 280 gid_type_mask, 281 IB_CACHE_GID_DEFAULT_MODE_DELETE); 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 down_read(&net_rwsem); 407 for_each_net(net) 408 for_each_netdev(net, ndev) 409 if (is_eth_port_of_netdev(ib_dev, port, rdma_ndev, ndev)) 410 add_netdev_ips(ib_dev, port, rdma_ndev, ndev); 411 up_read(&net_rwsem); 412 rtnl_unlock(); 413 } 414 415 /** 416 * rdma_roce_rescan_device - Rescan all of the network devices in the system 417 * and add their gids, as needed, to the relevant RoCE devices. 418 * 419 * @device: the rdma device 420 */ 421 void rdma_roce_rescan_device(struct ib_device *ib_dev) 422 { 423 ib_enum_roce_netdev(ib_dev, pass_all_filter, NULL, 424 enum_all_gids_of_dev_cb, NULL); 425 } 426 EXPORT_SYMBOL(rdma_roce_rescan_device); 427 428 static void callback_for_addr_gid_device_scan(struct ib_device *device, 429 u8 port, 430 struct net_device *rdma_ndev, 431 void *cookie) 432 { 433 struct update_gid_event_work *parsed = cookie; 434 435 return update_gid(parsed->gid_op, device, 436 port, &parsed->gid, 437 &parsed->gid_attr); 438 } 439 440 struct upper_list { 441 struct list_head list; 442 struct net_device *upper; 443 }; 444 445 static int netdev_upper_walk(struct net_device *upper, void *data) 446 { 447 struct upper_list *entry = kmalloc(sizeof(*entry), GFP_ATOMIC); 448 struct list_head *upper_list = data; 449 450 if (!entry) 451 return 0; 452 453 list_add_tail(&entry->list, upper_list); 454 dev_hold(upper); 455 entry->upper = upper; 456 457 return 0; 458 } 459 460 static void handle_netdev_upper(struct ib_device *ib_dev, u8 port, 461 void *cookie, 462 void (*handle_netdev)(struct ib_device *ib_dev, 463 u8 port, 464 struct net_device *ndev)) 465 { 466 struct net_device *ndev = cookie; 467 struct upper_list *upper_iter; 468 struct upper_list *upper_temp; 469 LIST_HEAD(upper_list); 470 471 rcu_read_lock(); 472 netdev_walk_all_upper_dev_rcu(ndev, netdev_upper_walk, &upper_list); 473 rcu_read_unlock(); 474 475 handle_netdev(ib_dev, port, ndev); 476 list_for_each_entry_safe(upper_iter, upper_temp, &upper_list, 477 list) { 478 handle_netdev(ib_dev, port, upper_iter->upper); 479 dev_put(upper_iter->upper); 480 list_del(&upper_iter->list); 481 kfree(upper_iter); 482 } 483 } 484 485 static void _roce_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, 486 struct net_device *event_ndev) 487 { 488 ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev); 489 } 490 491 static void del_netdev_upper_ips(struct ib_device *ib_dev, u8 port, 492 struct net_device *rdma_ndev, void *cookie) 493 { 494 handle_netdev_upper(ib_dev, port, cookie, _roce_del_all_netdev_gids); 495 } 496 497 static void add_netdev_upper_ips(struct ib_device *ib_dev, u8 port, 498 struct net_device *rdma_ndev, void *cookie) 499 { 500 handle_netdev_upper(ib_dev, port, cookie, _add_netdev_ips); 501 } 502 503 static void del_netdev_default_ips_join(struct ib_device *ib_dev, u8 port, 504 struct net_device *rdma_ndev, 505 void *cookie) 506 { 507 struct net_device *master_ndev; 508 509 rcu_read_lock(); 510 master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev); 511 if (master_ndev) 512 dev_hold(master_ndev); 513 rcu_read_unlock(); 514 515 if (master_ndev) { 516 bond_delete_netdev_default_gids(ib_dev, port, master_ndev, 517 rdma_ndev); 518 dev_put(master_ndev); 519 } 520 } 521 522 static void del_netdev_default_ips(struct ib_device *ib_dev, u8 port, 523 struct net_device *rdma_ndev, void *cookie) 524 { 525 bond_delete_netdev_default_gids(ib_dev, port, cookie, rdma_ndev); 526 } 527 528 /* The following functions operate on all IB devices. netdevice_event and 529 * addr_event execute ib_enum_all_roce_netdevs through a work. 530 * ib_enum_all_roce_netdevs iterates through all IB devices. 531 */ 532 533 static void netdevice_event_work_handler(struct work_struct *_work) 534 { 535 struct netdev_event_work *work = 536 container_of(_work, struct netdev_event_work, work); 537 unsigned int i; 538 539 for (i = 0; i < ARRAY_SIZE(work->cmds) && work->cmds[i].cb; i++) { 540 ib_enum_all_roce_netdevs(work->cmds[i].filter, 541 work->cmds[i].filter_ndev, 542 work->cmds[i].cb, 543 work->cmds[i].ndev); 544 dev_put(work->cmds[i].ndev); 545 dev_put(work->cmds[i].filter_ndev); 546 } 547 548 kfree(work); 549 } 550 551 static int netdevice_queue_work(struct netdev_event_work_cmd *cmds, 552 struct net_device *ndev) 553 { 554 unsigned int i; 555 struct netdev_event_work *ndev_work = 556 kmalloc(sizeof(*ndev_work), GFP_KERNEL); 557 558 if (!ndev_work) 559 return NOTIFY_DONE; 560 561 memcpy(ndev_work->cmds, cmds, sizeof(ndev_work->cmds)); 562 for (i = 0; i < ARRAY_SIZE(ndev_work->cmds) && ndev_work->cmds[i].cb; i++) { 563 if (!ndev_work->cmds[i].ndev) 564 ndev_work->cmds[i].ndev = ndev; 565 if (!ndev_work->cmds[i].filter_ndev) 566 ndev_work->cmds[i].filter_ndev = ndev; 567 dev_hold(ndev_work->cmds[i].ndev); 568 dev_hold(ndev_work->cmds[i].filter_ndev); 569 } 570 INIT_WORK(&ndev_work->work, netdevice_event_work_handler); 571 572 queue_work(gid_cache_wq, &ndev_work->work); 573 574 return NOTIFY_DONE; 575 } 576 577 static const struct netdev_event_work_cmd add_cmd = { 578 .cb = add_netdev_ips, .filter = is_eth_port_of_netdev}; 579 static const struct netdev_event_work_cmd add_cmd_upper_ips = { 580 .cb = add_netdev_upper_ips, .filter = is_eth_port_of_netdev}; 581 582 static void netdevice_event_changeupper(struct netdev_notifier_changeupper_info *changeupper_info, 583 struct netdev_event_work_cmd *cmds) 584 { 585 static const struct netdev_event_work_cmd upper_ips_del_cmd = { 586 .cb = del_netdev_upper_ips, .filter = upper_device_filter}; 587 static const struct netdev_event_work_cmd bonding_default_del_cmd = { 588 .cb = del_netdev_default_ips, .filter = is_eth_port_inactive_slave}; 589 590 if (changeupper_info->linking == false) { 591 cmds[0] = upper_ips_del_cmd; 592 cmds[0].ndev = changeupper_info->upper_dev; 593 cmds[1] = add_cmd; 594 } else { 595 cmds[0] = bonding_default_del_cmd; 596 cmds[0].ndev = changeupper_info->upper_dev; 597 cmds[1] = add_cmd_upper_ips; 598 cmds[1].ndev = changeupper_info->upper_dev; 599 cmds[1].filter_ndev = changeupper_info->upper_dev; 600 } 601 } 602 603 static int netdevice_event(struct notifier_block *this, unsigned long event, 604 void *ptr) 605 { 606 static const struct netdev_event_work_cmd del_cmd = { 607 .cb = del_netdev_ips, .filter = pass_all_filter}; 608 static const struct netdev_event_work_cmd bonding_default_del_cmd_join = { 609 .cb = del_netdev_default_ips_join, .filter = is_eth_port_inactive_slave}; 610 static const struct netdev_event_work_cmd default_del_cmd = { 611 .cb = del_netdev_default_ips, .filter = pass_all_filter}; 612 static const struct netdev_event_work_cmd bonding_event_ips_del_cmd = { 613 .cb = del_netdev_upper_ips, .filter = upper_device_filter}; 614 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 615 struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ] = { {NULL} }; 616 617 if (ndev->type != ARPHRD_ETHER) 618 return NOTIFY_DONE; 619 620 switch (event) { 621 case NETDEV_REGISTER: 622 case NETDEV_UP: 623 cmds[0] = bonding_default_del_cmd_join; 624 cmds[1] = add_cmd; 625 break; 626 627 case NETDEV_UNREGISTER: 628 if (ndev->reg_state < NETREG_UNREGISTERED) 629 cmds[0] = del_cmd; 630 else 631 return NOTIFY_DONE; 632 break; 633 634 case NETDEV_CHANGEADDR: 635 cmds[0] = default_del_cmd; 636 cmds[1] = add_cmd; 637 break; 638 639 case NETDEV_CHANGEUPPER: 640 netdevice_event_changeupper( 641 container_of(ptr, struct netdev_notifier_changeupper_info, info), 642 cmds); 643 break; 644 645 case NETDEV_BONDING_FAILOVER: 646 cmds[0] = bonding_event_ips_del_cmd; 647 cmds[1] = bonding_default_del_cmd_join; 648 cmds[2] = add_cmd_upper_ips; 649 break; 650 651 default: 652 return NOTIFY_DONE; 653 } 654 655 return netdevice_queue_work(cmds, ndev); 656 } 657 658 static void update_gid_event_work_handler(struct work_struct *_work) 659 { 660 struct update_gid_event_work *work = 661 container_of(_work, struct update_gid_event_work, work); 662 663 ib_enum_all_roce_netdevs(is_eth_port_of_netdev, work->gid_attr.ndev, 664 callback_for_addr_gid_device_scan, work); 665 666 dev_put(work->gid_attr.ndev); 667 kfree(work); 668 } 669 670 static int addr_event(struct notifier_block *this, unsigned long event, 671 struct sockaddr *sa, struct net_device *ndev) 672 { 673 struct update_gid_event_work *work; 674 enum gid_op_type gid_op; 675 676 if (ndev->type != ARPHRD_ETHER) 677 return NOTIFY_DONE; 678 679 switch (event) { 680 case NETDEV_UP: 681 gid_op = GID_ADD; 682 break; 683 684 case NETDEV_DOWN: 685 gid_op = GID_DEL; 686 break; 687 688 default: 689 return NOTIFY_DONE; 690 } 691 692 work = kmalloc(sizeof(*work), GFP_ATOMIC); 693 if (!work) 694 return NOTIFY_DONE; 695 696 INIT_WORK(&work->work, update_gid_event_work_handler); 697 698 rdma_ip2gid(sa, &work->gid); 699 work->gid_op = gid_op; 700 701 memset(&work->gid_attr, 0, sizeof(work->gid_attr)); 702 dev_hold(ndev); 703 work->gid_attr.ndev = ndev; 704 705 queue_work(gid_cache_wq, &work->work); 706 707 return NOTIFY_DONE; 708 } 709 710 static int inetaddr_event(struct notifier_block *this, unsigned long event, 711 void *ptr) 712 { 713 struct sockaddr_in in; 714 struct net_device *ndev; 715 struct in_ifaddr *ifa = ptr; 716 717 in.sin_family = AF_INET; 718 in.sin_addr.s_addr = ifa->ifa_address; 719 ndev = ifa->ifa_dev->dev; 720 721 return addr_event(this, event, (struct sockaddr *)&in, ndev); 722 } 723 724 static int inet6addr_event(struct notifier_block *this, unsigned long event, 725 void *ptr) 726 { 727 struct sockaddr_in6 in6; 728 struct net_device *ndev; 729 struct inet6_ifaddr *ifa6 = ptr; 730 731 in6.sin6_family = AF_INET6; 732 in6.sin6_addr = ifa6->addr; 733 ndev = ifa6->idev->dev; 734 735 return addr_event(this, event, (struct sockaddr *)&in6, ndev); 736 } 737 738 static struct notifier_block nb_netdevice = { 739 .notifier_call = netdevice_event 740 }; 741 742 static struct notifier_block nb_inetaddr = { 743 .notifier_call = inetaddr_event 744 }; 745 746 static struct notifier_block nb_inet6addr = { 747 .notifier_call = inet6addr_event 748 }; 749 750 int __init roce_gid_mgmt_init(void) 751 { 752 gid_cache_wq = alloc_ordered_workqueue("gid-cache-wq", 0); 753 if (!gid_cache_wq) 754 return -ENOMEM; 755 756 register_inetaddr_notifier(&nb_inetaddr); 757 if (IS_ENABLED(CONFIG_IPV6)) 758 register_inet6addr_notifier(&nb_inet6addr); 759 /* We relay on the netdevice notifier to enumerate all 760 * existing devices in the system. Register to this notifier 761 * last to make sure we will not miss any IP add/del 762 * callbacks. 763 */ 764 register_netdevice_notifier(&nb_netdevice); 765 766 return 0; 767 } 768 769 void __exit roce_gid_mgmt_cleanup(void) 770 { 771 if (IS_ENABLED(CONFIG_IPV6)) 772 unregister_inet6addr_notifier(&nb_inet6addr); 773 unregister_inetaddr_notifier(&nb_inetaddr); 774 unregister_netdevice_notifier(&nb_netdevice); 775 /* Ensure all gid deletion tasks complete before we go down, 776 * to avoid any reference to free'd memory. By the time 777 * ib-core is removed, all physical devices have been removed, 778 * so no issue with remaining hardware contexts. 779 */ 780 destroy_workqueue(gid_cache_wq); 781 } 782