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 bool 147 is_eth_port_of_netdev_filter(struct ib_device *ib_dev, u8 port, 148 struct net_device *rdma_ndev, void *cookie) 149 { 150 struct net_device *real_dev; 151 bool res; 152 153 if (!rdma_ndev) 154 return false; 155 156 rcu_read_lock(); 157 real_dev = rdma_vlan_dev_real_dev(cookie); 158 if (!real_dev) 159 real_dev = cookie; 160 161 res = ((rdma_is_upper_dev_rcu(rdma_ndev, cookie) && 162 (is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) & 163 REQUIRED_BOND_STATES)) || 164 real_dev == rdma_ndev); 165 166 rcu_read_unlock(); 167 return res; 168 } 169 170 static bool 171 is_eth_port_inactive_slave_filter(struct ib_device *ib_dev, u8 port, 172 struct net_device *rdma_ndev, void *cookie) 173 { 174 struct net_device *master_dev; 175 bool res; 176 177 if (!rdma_ndev) 178 return false; 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 /** is_ndev_for_default_gid_filter - Check if a given netdevice 190 * can be considered for default GIDs or not. 191 * @ib_dev: IB device to check 192 * @port: Port to consider for adding default GID 193 * @rdma_ndev: rdma netdevice pointer 194 * @cookie_ndev: Netdevice to consider to form a default GID 195 * 196 * is_ndev_for_default_gid_filter() returns true if a given netdevice can be 197 * considered for deriving default RoCE GID, returns false otherwise. 198 */ 199 static bool 200 is_ndev_for_default_gid_filter(struct ib_device *ib_dev, u8 port, 201 struct net_device *rdma_ndev, void *cookie) 202 { 203 struct net_device *cookie_ndev = cookie; 204 bool res; 205 206 if (!rdma_ndev) 207 return false; 208 209 rcu_read_lock(); 210 211 /* 212 * When rdma netdevice is used in bonding, bonding master netdevice 213 * should be considered for default GIDs. Therefore, ignore slave rdma 214 * netdevices when bonding is considered. 215 * Additionally when event(cookie) netdevice is bond master device, 216 * make sure that it the upper netdevice of rdma netdevice. 217 */ 218 res = ((cookie_ndev == rdma_ndev && !netif_is_bond_slave(rdma_ndev)) || 219 (netif_is_bond_master(cookie_ndev) && 220 rdma_is_upper_dev_rcu(rdma_ndev, cookie_ndev))); 221 222 rcu_read_unlock(); 223 return res; 224 } 225 226 static bool pass_all_filter(struct ib_device *ib_dev, u8 port, 227 struct net_device *rdma_ndev, void *cookie) 228 { 229 return true; 230 } 231 232 static bool upper_device_filter(struct ib_device *ib_dev, u8 port, 233 struct net_device *rdma_ndev, void *cookie) 234 { 235 bool res; 236 237 if (!rdma_ndev) 238 return false; 239 240 if (rdma_ndev == cookie) 241 return true; 242 243 rcu_read_lock(); 244 res = rdma_is_upper_dev_rcu(rdma_ndev, cookie); 245 rcu_read_unlock(); 246 247 return res; 248 } 249 250 /** 251 * is_upper_ndev_bond_master_filter - Check if a given netdevice 252 * is bond master device of netdevice of the the RDMA device of port. 253 * @ib_dev: IB device to check 254 * @port: Port to consider for adding default GID 255 * @rdma_ndev: Pointer to rdma netdevice 256 * @cookie: Netdevice to consider to form a default GID 257 * 258 * is_upper_ndev_bond_master_filter() returns true if a cookie_netdev 259 * is bond master device and rdma_ndev is its lower netdevice. It might 260 * not have been established as slave device yet. 261 */ 262 static bool 263 is_upper_ndev_bond_master_filter(struct ib_device *ib_dev, u8 port, 264 struct net_device *rdma_ndev, 265 void *cookie) 266 { 267 struct net_device *cookie_ndev = cookie; 268 bool match = false; 269 270 rcu_read_lock(); 271 if (netif_is_bond_master(cookie_ndev) && 272 rdma_is_upper_dev_rcu(rdma_ndev, cookie_ndev)) 273 match = true; 274 rcu_read_unlock(); 275 return match; 276 } 277 278 static void update_gid_ip(enum gid_op_type gid_op, 279 struct ib_device *ib_dev, 280 u8 port, struct net_device *ndev, 281 struct sockaddr *addr) 282 { 283 union ib_gid gid; 284 struct ib_gid_attr gid_attr; 285 286 rdma_ip2gid(addr, &gid); 287 memset(&gid_attr, 0, sizeof(gid_attr)); 288 gid_attr.ndev = ndev; 289 290 update_gid(gid_op, ib_dev, port, &gid, &gid_attr); 291 } 292 293 static void bond_delete_netdev_default_gids(struct ib_device *ib_dev, 294 u8 port, 295 struct net_device *rdma_ndev, 296 struct net_device *event_ndev) 297 { 298 struct net_device *real_dev = rdma_vlan_dev_real_dev(event_ndev); 299 unsigned long gid_type_mask; 300 301 if (!rdma_ndev) 302 return; 303 304 if (!real_dev) 305 real_dev = event_ndev; 306 307 rcu_read_lock(); 308 309 if (((rdma_ndev != event_ndev && 310 !rdma_is_upper_dev_rcu(rdma_ndev, event_ndev)) || 311 is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) 312 == 313 BONDING_SLAVE_STATE_INACTIVE)) { 314 rcu_read_unlock(); 315 return; 316 } 317 318 rcu_read_unlock(); 319 320 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 321 322 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, 323 gid_type_mask, 324 IB_CACHE_GID_DEFAULT_MODE_DELETE); 325 } 326 327 static void enum_netdev_ipv4_ips(struct ib_device *ib_dev, 328 u8 port, struct net_device *ndev) 329 { 330 struct in_device *in_dev; 331 struct sin_list { 332 struct list_head list; 333 struct sockaddr_in ip; 334 }; 335 struct sin_list *sin_iter; 336 struct sin_list *sin_temp; 337 338 LIST_HEAD(sin_list); 339 if (ndev->reg_state >= NETREG_UNREGISTERING) 340 return; 341 342 rcu_read_lock(); 343 in_dev = __in_dev_get_rcu(ndev); 344 if (!in_dev) { 345 rcu_read_unlock(); 346 return; 347 } 348 349 for_ifa(in_dev) { 350 struct sin_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC); 351 352 if (!entry) 353 continue; 354 355 entry->ip.sin_family = AF_INET; 356 entry->ip.sin_addr.s_addr = ifa->ifa_address; 357 list_add_tail(&entry->list, &sin_list); 358 } 359 endfor_ifa(in_dev); 360 rcu_read_unlock(); 361 362 list_for_each_entry_safe(sin_iter, sin_temp, &sin_list, list) { 363 update_gid_ip(GID_ADD, ib_dev, port, ndev, 364 (struct sockaddr *)&sin_iter->ip); 365 list_del(&sin_iter->list); 366 kfree(sin_iter); 367 } 368 } 369 370 static void enum_netdev_ipv6_ips(struct ib_device *ib_dev, 371 u8 port, struct net_device *ndev) 372 { 373 struct inet6_ifaddr *ifp; 374 struct inet6_dev *in6_dev; 375 struct sin6_list { 376 struct list_head list; 377 struct sockaddr_in6 sin6; 378 }; 379 struct sin6_list *sin6_iter; 380 struct sin6_list *sin6_temp; 381 struct ib_gid_attr gid_attr = {.ndev = ndev}; 382 LIST_HEAD(sin6_list); 383 384 if (ndev->reg_state >= NETREG_UNREGISTERING) 385 return; 386 387 in6_dev = in6_dev_get(ndev); 388 if (!in6_dev) 389 return; 390 391 read_lock_bh(&in6_dev->lock); 392 list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { 393 struct sin6_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC); 394 395 if (!entry) 396 continue; 397 398 entry->sin6.sin6_family = AF_INET6; 399 entry->sin6.sin6_addr = ifp->addr; 400 list_add_tail(&entry->list, &sin6_list); 401 } 402 read_unlock_bh(&in6_dev->lock); 403 404 in6_dev_put(in6_dev); 405 406 list_for_each_entry_safe(sin6_iter, sin6_temp, &sin6_list, list) { 407 union ib_gid gid; 408 409 rdma_ip2gid((struct sockaddr *)&sin6_iter->sin6, &gid); 410 update_gid(GID_ADD, ib_dev, port, &gid, &gid_attr); 411 list_del(&sin6_iter->list); 412 kfree(sin6_iter); 413 } 414 } 415 416 static void _add_netdev_ips(struct ib_device *ib_dev, u8 port, 417 struct net_device *ndev) 418 { 419 enum_netdev_ipv4_ips(ib_dev, port, ndev); 420 if (IS_ENABLED(CONFIG_IPV6)) 421 enum_netdev_ipv6_ips(ib_dev, port, ndev); 422 } 423 424 static void add_netdev_ips(struct ib_device *ib_dev, u8 port, 425 struct net_device *rdma_ndev, void *cookie) 426 { 427 _add_netdev_ips(ib_dev, port, cookie); 428 } 429 430 static void del_netdev_ips(struct ib_device *ib_dev, u8 port, 431 struct net_device *rdma_ndev, void *cookie) 432 { 433 ib_cache_gid_del_all_netdev_gids(ib_dev, port, cookie); 434 } 435 436 /** 437 * del_default_gids - Delete default GIDs of the event/cookie netdevice 438 * @ib_dev: RDMA device pointer 439 * @port: Port of the RDMA device whose GID table to consider 440 * @rdma_ndev: Unused rdma netdevice 441 * @cookie: Pointer to event netdevice 442 * 443 * del_default_gids() deletes the default GIDs of the event/cookie netdevice. 444 */ 445 static void del_default_gids(struct ib_device *ib_dev, u8 port, 446 struct net_device *rdma_ndev, void *cookie) 447 { 448 struct net_device *cookie_ndev = cookie; 449 unsigned long gid_type_mask; 450 451 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 452 453 ib_cache_gid_set_default_gid(ib_dev, port, cookie_ndev, gid_type_mask, 454 IB_CACHE_GID_DEFAULT_MODE_DELETE); 455 } 456 457 static void add_default_gids(struct ib_device *ib_dev, u8 port, 458 struct net_device *rdma_ndev, void *cookie) 459 { 460 struct net_device *event_ndev = cookie; 461 unsigned long gid_type_mask; 462 463 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 464 ib_cache_gid_set_default_gid(ib_dev, port, event_ndev, gid_type_mask, 465 IB_CACHE_GID_DEFAULT_MODE_SET); 466 } 467 468 static void enum_all_gids_of_dev_cb(struct ib_device *ib_dev, 469 u8 port, 470 struct net_device *rdma_ndev, 471 void *cookie) 472 { 473 struct net *net; 474 struct net_device *ndev; 475 476 /* Lock the rtnl to make sure the netdevs does not move under 477 * our feet 478 */ 479 rtnl_lock(); 480 down_read(&net_rwsem); 481 for_each_net(net) 482 for_each_netdev(net, ndev) { 483 /* 484 * Filter and add default GIDs of the primary netdevice 485 * when not in bonding mode, or add default GIDs 486 * of bond master device, when in bonding mode. 487 */ 488 if (is_ndev_for_default_gid_filter(ib_dev, port, 489 rdma_ndev, ndev)) 490 add_default_gids(ib_dev, port, rdma_ndev, ndev); 491 492 if (is_eth_port_of_netdev_filter(ib_dev, port, 493 rdma_ndev, ndev)) 494 _add_netdev_ips(ib_dev, port, ndev); 495 } 496 up_read(&net_rwsem); 497 rtnl_unlock(); 498 } 499 500 /** 501 * rdma_roce_rescan_device - Rescan all of the network devices in the system 502 * and add their gids, as needed, to the relevant RoCE devices. 503 * 504 * @device: the rdma device 505 */ 506 void rdma_roce_rescan_device(struct ib_device *ib_dev) 507 { 508 ib_enum_roce_netdev(ib_dev, pass_all_filter, NULL, 509 enum_all_gids_of_dev_cb, NULL); 510 } 511 EXPORT_SYMBOL(rdma_roce_rescan_device); 512 513 static void callback_for_addr_gid_device_scan(struct ib_device *device, 514 u8 port, 515 struct net_device *rdma_ndev, 516 void *cookie) 517 { 518 struct update_gid_event_work *parsed = cookie; 519 520 return update_gid(parsed->gid_op, device, 521 port, &parsed->gid, 522 &parsed->gid_attr); 523 } 524 525 struct upper_list { 526 struct list_head list; 527 struct net_device *upper; 528 }; 529 530 static int netdev_upper_walk(struct net_device *upper, void *data) 531 { 532 struct upper_list *entry = kmalloc(sizeof(*entry), GFP_ATOMIC); 533 struct list_head *upper_list = data; 534 535 if (!entry) 536 return 0; 537 538 list_add_tail(&entry->list, upper_list); 539 dev_hold(upper); 540 entry->upper = upper; 541 542 return 0; 543 } 544 545 static void handle_netdev_upper(struct ib_device *ib_dev, u8 port, 546 void *cookie, 547 void (*handle_netdev)(struct ib_device *ib_dev, 548 u8 port, 549 struct net_device *ndev)) 550 { 551 struct net_device *ndev = cookie; 552 struct upper_list *upper_iter; 553 struct upper_list *upper_temp; 554 LIST_HEAD(upper_list); 555 556 rcu_read_lock(); 557 netdev_walk_all_upper_dev_rcu(ndev, netdev_upper_walk, &upper_list); 558 rcu_read_unlock(); 559 560 handle_netdev(ib_dev, port, ndev); 561 list_for_each_entry_safe(upper_iter, upper_temp, &upper_list, 562 list) { 563 handle_netdev(ib_dev, port, upper_iter->upper); 564 dev_put(upper_iter->upper); 565 list_del(&upper_iter->list); 566 kfree(upper_iter); 567 } 568 } 569 570 static void _roce_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, 571 struct net_device *event_ndev) 572 { 573 ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev); 574 } 575 576 static void del_netdev_upper_ips(struct ib_device *ib_dev, u8 port, 577 struct net_device *rdma_ndev, void *cookie) 578 { 579 handle_netdev_upper(ib_dev, port, cookie, _roce_del_all_netdev_gids); 580 } 581 582 static void add_netdev_upper_ips(struct ib_device *ib_dev, u8 port, 583 struct net_device *rdma_ndev, void *cookie) 584 { 585 handle_netdev_upper(ib_dev, port, cookie, _add_netdev_ips); 586 } 587 588 static void del_netdev_default_ips_join(struct ib_device *ib_dev, u8 port, 589 struct net_device *rdma_ndev, 590 void *cookie) 591 { 592 struct net_device *master_ndev; 593 594 rcu_read_lock(); 595 master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev); 596 if (master_ndev) 597 dev_hold(master_ndev); 598 rcu_read_unlock(); 599 600 if (master_ndev) { 601 bond_delete_netdev_default_gids(ib_dev, port, rdma_ndev, 602 master_ndev); 603 dev_put(master_ndev); 604 } 605 } 606 607 /* The following functions operate on all IB devices. netdevice_event and 608 * addr_event execute ib_enum_all_roce_netdevs through a work. 609 * ib_enum_all_roce_netdevs iterates through all IB devices. 610 */ 611 612 static void netdevice_event_work_handler(struct work_struct *_work) 613 { 614 struct netdev_event_work *work = 615 container_of(_work, struct netdev_event_work, work); 616 unsigned int i; 617 618 for (i = 0; i < ARRAY_SIZE(work->cmds) && work->cmds[i].cb; i++) { 619 ib_enum_all_roce_netdevs(work->cmds[i].filter, 620 work->cmds[i].filter_ndev, 621 work->cmds[i].cb, 622 work->cmds[i].ndev); 623 dev_put(work->cmds[i].ndev); 624 dev_put(work->cmds[i].filter_ndev); 625 } 626 627 kfree(work); 628 } 629 630 static int netdevice_queue_work(struct netdev_event_work_cmd *cmds, 631 struct net_device *ndev) 632 { 633 unsigned int i; 634 struct netdev_event_work *ndev_work = 635 kmalloc(sizeof(*ndev_work), GFP_KERNEL); 636 637 if (!ndev_work) 638 return NOTIFY_DONE; 639 640 memcpy(ndev_work->cmds, cmds, sizeof(ndev_work->cmds)); 641 for (i = 0; i < ARRAY_SIZE(ndev_work->cmds) && ndev_work->cmds[i].cb; i++) { 642 if (!ndev_work->cmds[i].ndev) 643 ndev_work->cmds[i].ndev = ndev; 644 if (!ndev_work->cmds[i].filter_ndev) 645 ndev_work->cmds[i].filter_ndev = ndev; 646 dev_hold(ndev_work->cmds[i].ndev); 647 dev_hold(ndev_work->cmds[i].filter_ndev); 648 } 649 INIT_WORK(&ndev_work->work, netdevice_event_work_handler); 650 651 queue_work(gid_cache_wq, &ndev_work->work); 652 653 return NOTIFY_DONE; 654 } 655 656 static const struct netdev_event_work_cmd add_cmd = { 657 .cb = add_netdev_ips, 658 .filter = is_eth_port_of_netdev_filter 659 }; 660 661 static const struct netdev_event_work_cmd add_cmd_upper_ips = { 662 .cb = add_netdev_upper_ips, 663 .filter = is_eth_port_of_netdev_filter 664 }; 665 666 static void 667 ndev_event_unlink(struct netdev_notifier_changeupper_info *changeupper_info, 668 struct netdev_event_work_cmd *cmds) 669 { 670 static const struct netdev_event_work_cmd 671 upper_ips_del_cmd = { 672 .cb = del_netdev_upper_ips, 673 .filter = upper_device_filter 674 }; 675 676 cmds[0] = upper_ips_del_cmd; 677 cmds[0].ndev = changeupper_info->upper_dev; 678 cmds[1] = add_cmd; 679 } 680 681 static const struct netdev_event_work_cmd bonding_default_add_cmd = { 682 .cb = add_default_gids, 683 .filter = is_upper_ndev_bond_master_filter 684 }; 685 686 static void 687 ndev_event_link(struct net_device *event_ndev, 688 struct netdev_notifier_changeupper_info *changeupper_info, 689 struct netdev_event_work_cmd *cmds) 690 { 691 static const struct netdev_event_work_cmd 692 bonding_default_del_cmd = { 693 .cb = del_default_gids, 694 .filter = is_upper_ndev_bond_master_filter 695 }; 696 /* 697 * When a lower netdev is linked to its upper bonding 698 * netdev, delete lower slave netdev's default GIDs. 699 */ 700 cmds[0] = bonding_default_del_cmd; 701 cmds[0].ndev = event_ndev; 702 cmds[0].filter_ndev = changeupper_info->upper_dev; 703 704 /* Now add bonding upper device default GIDs */ 705 cmds[1] = bonding_default_add_cmd; 706 cmds[1].ndev = changeupper_info->upper_dev; 707 cmds[1].filter_ndev = changeupper_info->upper_dev; 708 709 /* Now add bonding upper device IP based GIDs */ 710 cmds[2] = add_cmd_upper_ips; 711 cmds[2].ndev = changeupper_info->upper_dev; 712 cmds[2].filter_ndev = changeupper_info->upper_dev; 713 } 714 715 static void netdevice_event_changeupper(struct net_device *event_ndev, 716 struct netdev_notifier_changeupper_info *changeupper_info, 717 struct netdev_event_work_cmd *cmds) 718 { 719 if (changeupper_info->linking) 720 ndev_event_link(event_ndev, changeupper_info, cmds); 721 else 722 ndev_event_unlink(changeupper_info, cmds); 723 } 724 725 static const struct netdev_event_work_cmd add_default_gid_cmd = { 726 .cb = add_default_gids, 727 .filter = is_ndev_for_default_gid_filter, 728 }; 729 730 static int netdevice_event(struct notifier_block *this, unsigned long event, 731 void *ptr) 732 { 733 static const struct netdev_event_work_cmd del_cmd = { 734 .cb = del_netdev_ips, .filter = pass_all_filter}; 735 static const struct netdev_event_work_cmd 736 bonding_default_del_cmd_join = { 737 .cb = del_netdev_default_ips_join, 738 .filter = is_eth_port_inactive_slave_filter 739 }; 740 static const struct netdev_event_work_cmd 741 netdev_del_cmd = { 742 .cb = del_netdev_ips, 743 .filter = is_eth_port_of_netdev_filter 744 }; 745 static const struct netdev_event_work_cmd bonding_event_ips_del_cmd = { 746 .cb = del_netdev_upper_ips, .filter = upper_device_filter}; 747 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 748 struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ] = { {NULL} }; 749 750 if (ndev->type != ARPHRD_ETHER) 751 return NOTIFY_DONE; 752 753 switch (event) { 754 case NETDEV_REGISTER: 755 case NETDEV_UP: 756 cmds[0] = bonding_default_del_cmd_join; 757 cmds[1] = add_default_gid_cmd; 758 cmds[2] = add_cmd; 759 break; 760 761 case NETDEV_UNREGISTER: 762 if (ndev->reg_state < NETREG_UNREGISTERED) 763 cmds[0] = del_cmd; 764 else 765 return NOTIFY_DONE; 766 break; 767 768 case NETDEV_CHANGEADDR: 769 cmds[0] = netdev_del_cmd; 770 cmds[1] = add_default_gid_cmd; 771 cmds[2] = add_cmd; 772 break; 773 774 case NETDEV_CHANGEUPPER: 775 netdevice_event_changeupper(ndev, 776 container_of(ptr, struct netdev_notifier_changeupper_info, info), 777 cmds); 778 break; 779 780 case NETDEV_BONDING_FAILOVER: 781 cmds[0] = bonding_event_ips_del_cmd; 782 /* Add default GIDs of the bond device */ 783 cmds[1] = bonding_default_add_cmd; 784 /* Add IP based GIDs of the bond device */ 785 cmds[2] = add_cmd_upper_ips; 786 break; 787 788 default: 789 return NOTIFY_DONE; 790 } 791 792 return netdevice_queue_work(cmds, ndev); 793 } 794 795 static void update_gid_event_work_handler(struct work_struct *_work) 796 { 797 struct update_gid_event_work *work = 798 container_of(_work, struct update_gid_event_work, work); 799 800 ib_enum_all_roce_netdevs(is_eth_port_of_netdev_filter, 801 work->gid_attr.ndev, 802 callback_for_addr_gid_device_scan, work); 803 804 dev_put(work->gid_attr.ndev); 805 kfree(work); 806 } 807 808 static int addr_event(struct notifier_block *this, unsigned long event, 809 struct sockaddr *sa, struct net_device *ndev) 810 { 811 struct update_gid_event_work *work; 812 enum gid_op_type gid_op; 813 814 if (ndev->type != ARPHRD_ETHER) 815 return NOTIFY_DONE; 816 817 switch (event) { 818 case NETDEV_UP: 819 gid_op = GID_ADD; 820 break; 821 822 case NETDEV_DOWN: 823 gid_op = GID_DEL; 824 break; 825 826 default: 827 return NOTIFY_DONE; 828 } 829 830 work = kmalloc(sizeof(*work), GFP_ATOMIC); 831 if (!work) 832 return NOTIFY_DONE; 833 834 INIT_WORK(&work->work, update_gid_event_work_handler); 835 836 rdma_ip2gid(sa, &work->gid); 837 work->gid_op = gid_op; 838 839 memset(&work->gid_attr, 0, sizeof(work->gid_attr)); 840 dev_hold(ndev); 841 work->gid_attr.ndev = ndev; 842 843 queue_work(gid_cache_wq, &work->work); 844 845 return NOTIFY_DONE; 846 } 847 848 static int inetaddr_event(struct notifier_block *this, unsigned long event, 849 void *ptr) 850 { 851 struct sockaddr_in in; 852 struct net_device *ndev; 853 struct in_ifaddr *ifa = ptr; 854 855 in.sin_family = AF_INET; 856 in.sin_addr.s_addr = ifa->ifa_address; 857 ndev = ifa->ifa_dev->dev; 858 859 return addr_event(this, event, (struct sockaddr *)&in, ndev); 860 } 861 862 static int inet6addr_event(struct notifier_block *this, unsigned long event, 863 void *ptr) 864 { 865 struct sockaddr_in6 in6; 866 struct net_device *ndev; 867 struct inet6_ifaddr *ifa6 = ptr; 868 869 in6.sin6_family = AF_INET6; 870 in6.sin6_addr = ifa6->addr; 871 ndev = ifa6->idev->dev; 872 873 return addr_event(this, event, (struct sockaddr *)&in6, ndev); 874 } 875 876 static struct notifier_block nb_netdevice = { 877 .notifier_call = netdevice_event 878 }; 879 880 static struct notifier_block nb_inetaddr = { 881 .notifier_call = inetaddr_event 882 }; 883 884 static struct notifier_block nb_inet6addr = { 885 .notifier_call = inet6addr_event 886 }; 887 888 int __init roce_gid_mgmt_init(void) 889 { 890 gid_cache_wq = alloc_ordered_workqueue("gid-cache-wq", 0); 891 if (!gid_cache_wq) 892 return -ENOMEM; 893 894 register_inetaddr_notifier(&nb_inetaddr); 895 if (IS_ENABLED(CONFIG_IPV6)) 896 register_inet6addr_notifier(&nb_inet6addr); 897 /* We relay on the netdevice notifier to enumerate all 898 * existing devices in the system. Register to this notifier 899 * last to make sure we will not miss any IP add/del 900 * callbacks. 901 */ 902 register_netdevice_notifier(&nb_netdevice); 903 904 return 0; 905 } 906 907 void __exit roce_gid_mgmt_cleanup(void) 908 { 909 if (IS_ENABLED(CONFIG_IPV6)) 910 unregister_inet6addr_notifier(&nb_inet6addr); 911 unregister_inetaddr_notifier(&nb_inetaddr); 912 unregister_netdevice_notifier(&nb_netdevice); 913 /* Ensure all gid deletion tasks complete before we go down, 914 * to avoid any reference to free'd memory. By the time 915 * ib-core is removed, all physical devices have been removed, 916 * so no issue with remaining hardware contexts. 917 */ 918 destroy_workqueue(gid_cache_wq); 919 } 920