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 if (!rdma_ndev) 271 return false; 272 273 rcu_read_lock(); 274 if (netif_is_bond_master(cookie_ndev) && 275 rdma_is_upper_dev_rcu(rdma_ndev, cookie_ndev)) 276 match = true; 277 rcu_read_unlock(); 278 return match; 279 } 280 281 static void update_gid_ip(enum gid_op_type gid_op, 282 struct ib_device *ib_dev, 283 u8 port, struct net_device *ndev, 284 struct sockaddr *addr) 285 { 286 union ib_gid gid; 287 struct ib_gid_attr gid_attr; 288 289 rdma_ip2gid(addr, &gid); 290 memset(&gid_attr, 0, sizeof(gid_attr)); 291 gid_attr.ndev = ndev; 292 293 update_gid(gid_op, ib_dev, port, &gid, &gid_attr); 294 } 295 296 static void bond_delete_netdev_default_gids(struct ib_device *ib_dev, 297 u8 port, 298 struct net_device *rdma_ndev, 299 struct net_device *event_ndev) 300 { 301 struct net_device *real_dev = rdma_vlan_dev_real_dev(event_ndev); 302 unsigned long gid_type_mask; 303 304 if (!rdma_ndev) 305 return; 306 307 if (!real_dev) 308 real_dev = event_ndev; 309 310 rcu_read_lock(); 311 312 if (((rdma_ndev != event_ndev && 313 !rdma_is_upper_dev_rcu(rdma_ndev, event_ndev)) || 314 is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) 315 == 316 BONDING_SLAVE_STATE_INACTIVE)) { 317 rcu_read_unlock(); 318 return; 319 } 320 321 rcu_read_unlock(); 322 323 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 324 325 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, 326 gid_type_mask, 327 IB_CACHE_GID_DEFAULT_MODE_DELETE); 328 } 329 330 static void enum_netdev_ipv4_ips(struct ib_device *ib_dev, 331 u8 port, struct net_device *ndev) 332 { 333 const struct in_ifaddr *ifa; 334 struct in_device *in_dev; 335 struct sin_list { 336 struct list_head list; 337 struct sockaddr_in ip; 338 }; 339 struct sin_list *sin_iter; 340 struct sin_list *sin_temp; 341 342 LIST_HEAD(sin_list); 343 if (ndev->reg_state >= NETREG_UNREGISTERING) 344 return; 345 346 rcu_read_lock(); 347 in_dev = __in_dev_get_rcu(ndev); 348 if (!in_dev) { 349 rcu_read_unlock(); 350 return; 351 } 352 353 in_dev_for_each_ifa_rcu(ifa, in_dev) { 354 struct sin_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC); 355 356 if (!entry) 357 continue; 358 359 entry->ip.sin_family = AF_INET; 360 entry->ip.sin_addr.s_addr = ifa->ifa_address; 361 list_add_tail(&entry->list, &sin_list); 362 } 363 364 rcu_read_unlock(); 365 366 list_for_each_entry_safe(sin_iter, sin_temp, &sin_list, list) { 367 update_gid_ip(GID_ADD, ib_dev, port, ndev, 368 (struct sockaddr *)&sin_iter->ip); 369 list_del(&sin_iter->list); 370 kfree(sin_iter); 371 } 372 } 373 374 static void enum_netdev_ipv6_ips(struct ib_device *ib_dev, 375 u8 port, struct net_device *ndev) 376 { 377 struct inet6_ifaddr *ifp; 378 struct inet6_dev *in6_dev; 379 struct sin6_list { 380 struct list_head list; 381 struct sockaddr_in6 sin6; 382 }; 383 struct sin6_list *sin6_iter; 384 struct sin6_list *sin6_temp; 385 struct ib_gid_attr gid_attr = {.ndev = ndev}; 386 LIST_HEAD(sin6_list); 387 388 if (ndev->reg_state >= NETREG_UNREGISTERING) 389 return; 390 391 in6_dev = in6_dev_get(ndev); 392 if (!in6_dev) 393 return; 394 395 read_lock_bh(&in6_dev->lock); 396 list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { 397 struct sin6_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC); 398 399 if (!entry) 400 continue; 401 402 entry->sin6.sin6_family = AF_INET6; 403 entry->sin6.sin6_addr = ifp->addr; 404 list_add_tail(&entry->list, &sin6_list); 405 } 406 read_unlock_bh(&in6_dev->lock); 407 408 in6_dev_put(in6_dev); 409 410 list_for_each_entry_safe(sin6_iter, sin6_temp, &sin6_list, list) { 411 union ib_gid gid; 412 413 rdma_ip2gid((struct sockaddr *)&sin6_iter->sin6, &gid); 414 update_gid(GID_ADD, ib_dev, port, &gid, &gid_attr); 415 list_del(&sin6_iter->list); 416 kfree(sin6_iter); 417 } 418 } 419 420 static void _add_netdev_ips(struct ib_device *ib_dev, u8 port, 421 struct net_device *ndev) 422 { 423 enum_netdev_ipv4_ips(ib_dev, port, ndev); 424 if (IS_ENABLED(CONFIG_IPV6)) 425 enum_netdev_ipv6_ips(ib_dev, port, ndev); 426 } 427 428 static void add_netdev_ips(struct ib_device *ib_dev, u8 port, 429 struct net_device *rdma_ndev, void *cookie) 430 { 431 _add_netdev_ips(ib_dev, port, cookie); 432 } 433 434 static void del_netdev_ips(struct ib_device *ib_dev, u8 port, 435 struct net_device *rdma_ndev, void *cookie) 436 { 437 ib_cache_gid_del_all_netdev_gids(ib_dev, port, cookie); 438 } 439 440 /** 441 * del_default_gids - Delete default GIDs of the event/cookie netdevice 442 * @ib_dev: RDMA device pointer 443 * @port: Port of the RDMA device whose GID table to consider 444 * @rdma_ndev: Unused rdma netdevice 445 * @cookie: Pointer to event netdevice 446 * 447 * del_default_gids() deletes the default GIDs of the event/cookie netdevice. 448 */ 449 static void del_default_gids(struct ib_device *ib_dev, u8 port, 450 struct net_device *rdma_ndev, void *cookie) 451 { 452 struct net_device *cookie_ndev = cookie; 453 unsigned long gid_type_mask; 454 455 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 456 457 ib_cache_gid_set_default_gid(ib_dev, port, cookie_ndev, gid_type_mask, 458 IB_CACHE_GID_DEFAULT_MODE_DELETE); 459 } 460 461 static void add_default_gids(struct ib_device *ib_dev, u8 port, 462 struct net_device *rdma_ndev, void *cookie) 463 { 464 struct net_device *event_ndev = cookie; 465 unsigned long gid_type_mask; 466 467 gid_type_mask = roce_gid_type_mask_support(ib_dev, port); 468 ib_cache_gid_set_default_gid(ib_dev, port, event_ndev, gid_type_mask, 469 IB_CACHE_GID_DEFAULT_MODE_SET); 470 } 471 472 static void enum_all_gids_of_dev_cb(struct ib_device *ib_dev, 473 u8 port, 474 struct net_device *rdma_ndev, 475 void *cookie) 476 { 477 struct net *net; 478 struct net_device *ndev; 479 480 /* Lock the rtnl to make sure the netdevs does not move under 481 * our feet 482 */ 483 rtnl_lock(); 484 down_read(&net_rwsem); 485 for_each_net(net) 486 for_each_netdev(net, ndev) { 487 /* 488 * Filter and add default GIDs of the primary netdevice 489 * when not in bonding mode, or add default GIDs 490 * of bond master device, when in bonding mode. 491 */ 492 if (is_ndev_for_default_gid_filter(ib_dev, port, 493 rdma_ndev, ndev)) 494 add_default_gids(ib_dev, port, rdma_ndev, ndev); 495 496 if (is_eth_port_of_netdev_filter(ib_dev, port, 497 rdma_ndev, ndev)) 498 _add_netdev_ips(ib_dev, port, ndev); 499 } 500 up_read(&net_rwsem); 501 rtnl_unlock(); 502 } 503 504 /** 505 * rdma_roce_rescan_device - Rescan all of the network devices in the system 506 * and add their gids, as needed, to the relevant RoCE devices. 507 * 508 * @ib_dev: the rdma device 509 */ 510 void rdma_roce_rescan_device(struct ib_device *ib_dev) 511 { 512 ib_enum_roce_netdev(ib_dev, pass_all_filter, NULL, 513 enum_all_gids_of_dev_cb, NULL); 514 } 515 EXPORT_SYMBOL(rdma_roce_rescan_device); 516 517 static void callback_for_addr_gid_device_scan(struct ib_device *device, 518 u8 port, 519 struct net_device *rdma_ndev, 520 void *cookie) 521 { 522 struct update_gid_event_work *parsed = cookie; 523 524 return update_gid(parsed->gid_op, device, 525 port, &parsed->gid, 526 &parsed->gid_attr); 527 } 528 529 struct upper_list { 530 struct list_head list; 531 struct net_device *upper; 532 }; 533 534 static int netdev_upper_walk(struct net_device *upper, 535 struct netdev_nested_priv *priv) 536 { 537 struct upper_list *entry = kmalloc(sizeof(*entry), GFP_ATOMIC); 538 struct list_head *upper_list = (struct list_head *)priv->data; 539 540 if (!entry) 541 return 0; 542 543 list_add_tail(&entry->list, upper_list); 544 dev_hold(upper); 545 entry->upper = upper; 546 547 return 0; 548 } 549 550 static void handle_netdev_upper(struct ib_device *ib_dev, u8 port, 551 void *cookie, 552 void (*handle_netdev)(struct ib_device *ib_dev, 553 u8 port, 554 struct net_device *ndev)) 555 { 556 struct net_device *ndev = cookie; 557 struct netdev_nested_priv priv; 558 struct upper_list *upper_iter; 559 struct upper_list *upper_temp; 560 LIST_HEAD(upper_list); 561 562 priv.data = &upper_list; 563 rcu_read_lock(); 564 netdev_walk_all_upper_dev_rcu(ndev, netdev_upper_walk, &priv); 565 rcu_read_unlock(); 566 567 handle_netdev(ib_dev, port, ndev); 568 list_for_each_entry_safe(upper_iter, upper_temp, &upper_list, 569 list) { 570 handle_netdev(ib_dev, port, upper_iter->upper); 571 dev_put(upper_iter->upper); 572 list_del(&upper_iter->list); 573 kfree(upper_iter); 574 } 575 } 576 577 static void _roce_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, 578 struct net_device *event_ndev) 579 { 580 ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev); 581 } 582 583 static void del_netdev_upper_ips(struct ib_device *ib_dev, u8 port, 584 struct net_device *rdma_ndev, void *cookie) 585 { 586 handle_netdev_upper(ib_dev, port, cookie, _roce_del_all_netdev_gids); 587 } 588 589 static void add_netdev_upper_ips(struct ib_device *ib_dev, u8 port, 590 struct net_device *rdma_ndev, void *cookie) 591 { 592 handle_netdev_upper(ib_dev, port, cookie, _add_netdev_ips); 593 } 594 595 static void del_netdev_default_ips_join(struct ib_device *ib_dev, u8 port, 596 struct net_device *rdma_ndev, 597 void *cookie) 598 { 599 struct net_device *master_ndev; 600 601 rcu_read_lock(); 602 master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev); 603 if (master_ndev) 604 dev_hold(master_ndev); 605 rcu_read_unlock(); 606 607 if (master_ndev) { 608 bond_delete_netdev_default_gids(ib_dev, port, rdma_ndev, 609 master_ndev); 610 dev_put(master_ndev); 611 } 612 } 613 614 /* The following functions operate on all IB devices. netdevice_event and 615 * addr_event execute ib_enum_all_roce_netdevs through a work. 616 * ib_enum_all_roce_netdevs iterates through all IB devices. 617 */ 618 619 static void netdevice_event_work_handler(struct work_struct *_work) 620 { 621 struct netdev_event_work *work = 622 container_of(_work, struct netdev_event_work, work); 623 unsigned int i; 624 625 for (i = 0; i < ARRAY_SIZE(work->cmds) && work->cmds[i].cb; i++) { 626 ib_enum_all_roce_netdevs(work->cmds[i].filter, 627 work->cmds[i].filter_ndev, 628 work->cmds[i].cb, 629 work->cmds[i].ndev); 630 dev_put(work->cmds[i].ndev); 631 dev_put(work->cmds[i].filter_ndev); 632 } 633 634 kfree(work); 635 } 636 637 static int netdevice_queue_work(struct netdev_event_work_cmd *cmds, 638 struct net_device *ndev) 639 { 640 unsigned int i; 641 struct netdev_event_work *ndev_work = 642 kmalloc(sizeof(*ndev_work), GFP_KERNEL); 643 644 if (!ndev_work) 645 return NOTIFY_DONE; 646 647 memcpy(ndev_work->cmds, cmds, sizeof(ndev_work->cmds)); 648 for (i = 0; i < ARRAY_SIZE(ndev_work->cmds) && ndev_work->cmds[i].cb; i++) { 649 if (!ndev_work->cmds[i].ndev) 650 ndev_work->cmds[i].ndev = ndev; 651 if (!ndev_work->cmds[i].filter_ndev) 652 ndev_work->cmds[i].filter_ndev = ndev; 653 dev_hold(ndev_work->cmds[i].ndev); 654 dev_hold(ndev_work->cmds[i].filter_ndev); 655 } 656 INIT_WORK(&ndev_work->work, netdevice_event_work_handler); 657 658 queue_work(gid_cache_wq, &ndev_work->work); 659 660 return NOTIFY_DONE; 661 } 662 663 static const struct netdev_event_work_cmd add_cmd = { 664 .cb = add_netdev_ips, 665 .filter = is_eth_port_of_netdev_filter 666 }; 667 668 static const struct netdev_event_work_cmd add_cmd_upper_ips = { 669 .cb = add_netdev_upper_ips, 670 .filter = is_eth_port_of_netdev_filter 671 }; 672 673 static void 674 ndev_event_unlink(struct netdev_notifier_changeupper_info *changeupper_info, 675 struct netdev_event_work_cmd *cmds) 676 { 677 static const struct netdev_event_work_cmd 678 upper_ips_del_cmd = { 679 .cb = del_netdev_upper_ips, 680 .filter = upper_device_filter 681 }; 682 683 cmds[0] = upper_ips_del_cmd; 684 cmds[0].ndev = changeupper_info->upper_dev; 685 cmds[1] = add_cmd; 686 } 687 688 static const struct netdev_event_work_cmd bonding_default_add_cmd = { 689 .cb = add_default_gids, 690 .filter = is_upper_ndev_bond_master_filter 691 }; 692 693 static void 694 ndev_event_link(struct net_device *event_ndev, 695 struct netdev_notifier_changeupper_info *changeupper_info, 696 struct netdev_event_work_cmd *cmds) 697 { 698 static const struct netdev_event_work_cmd 699 bonding_default_del_cmd = { 700 .cb = del_default_gids, 701 .filter = is_upper_ndev_bond_master_filter 702 }; 703 /* 704 * When a lower netdev is linked to its upper bonding 705 * netdev, delete lower slave netdev's default GIDs. 706 */ 707 cmds[0] = bonding_default_del_cmd; 708 cmds[0].ndev = event_ndev; 709 cmds[0].filter_ndev = changeupper_info->upper_dev; 710 711 /* Now add bonding upper device default GIDs */ 712 cmds[1] = bonding_default_add_cmd; 713 cmds[1].ndev = changeupper_info->upper_dev; 714 cmds[1].filter_ndev = changeupper_info->upper_dev; 715 716 /* Now add bonding upper device IP based GIDs */ 717 cmds[2] = add_cmd_upper_ips; 718 cmds[2].ndev = changeupper_info->upper_dev; 719 cmds[2].filter_ndev = changeupper_info->upper_dev; 720 } 721 722 static void netdevice_event_changeupper(struct net_device *event_ndev, 723 struct netdev_notifier_changeupper_info *changeupper_info, 724 struct netdev_event_work_cmd *cmds) 725 { 726 if (changeupper_info->linking) 727 ndev_event_link(event_ndev, changeupper_info, cmds); 728 else 729 ndev_event_unlink(changeupper_info, cmds); 730 } 731 732 static const struct netdev_event_work_cmd add_default_gid_cmd = { 733 .cb = add_default_gids, 734 .filter = is_ndev_for_default_gid_filter, 735 }; 736 737 static int netdevice_event(struct notifier_block *this, unsigned long event, 738 void *ptr) 739 { 740 static const struct netdev_event_work_cmd del_cmd = { 741 .cb = del_netdev_ips, .filter = pass_all_filter}; 742 static const struct netdev_event_work_cmd 743 bonding_default_del_cmd_join = { 744 .cb = del_netdev_default_ips_join, 745 .filter = is_eth_port_inactive_slave_filter 746 }; 747 static const struct netdev_event_work_cmd 748 netdev_del_cmd = { 749 .cb = del_netdev_ips, 750 .filter = is_eth_port_of_netdev_filter 751 }; 752 static const struct netdev_event_work_cmd bonding_event_ips_del_cmd = { 753 .cb = del_netdev_upper_ips, .filter = upper_device_filter}; 754 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 755 struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ] = { {NULL} }; 756 757 if (ndev->type != ARPHRD_ETHER) 758 return NOTIFY_DONE; 759 760 switch (event) { 761 case NETDEV_REGISTER: 762 case NETDEV_UP: 763 cmds[0] = bonding_default_del_cmd_join; 764 cmds[1] = add_default_gid_cmd; 765 cmds[2] = add_cmd; 766 break; 767 768 case NETDEV_UNREGISTER: 769 if (ndev->reg_state < NETREG_UNREGISTERED) 770 cmds[0] = del_cmd; 771 else 772 return NOTIFY_DONE; 773 break; 774 775 case NETDEV_CHANGEADDR: 776 cmds[0] = netdev_del_cmd; 777 if (ndev->reg_state == NETREG_REGISTERED) { 778 cmds[1] = add_default_gid_cmd; 779 cmds[2] = add_cmd; 780 } 781 break; 782 783 case NETDEV_CHANGEUPPER: 784 netdevice_event_changeupper(ndev, 785 container_of(ptr, struct netdev_notifier_changeupper_info, info), 786 cmds); 787 break; 788 789 case NETDEV_BONDING_FAILOVER: 790 cmds[0] = bonding_event_ips_del_cmd; 791 /* Add default GIDs of the bond device */ 792 cmds[1] = bonding_default_add_cmd; 793 /* Add IP based GIDs of the bond device */ 794 cmds[2] = add_cmd_upper_ips; 795 break; 796 797 default: 798 return NOTIFY_DONE; 799 } 800 801 return netdevice_queue_work(cmds, ndev); 802 } 803 804 static void update_gid_event_work_handler(struct work_struct *_work) 805 { 806 struct update_gid_event_work *work = 807 container_of(_work, struct update_gid_event_work, work); 808 809 ib_enum_all_roce_netdevs(is_eth_port_of_netdev_filter, 810 work->gid_attr.ndev, 811 callback_for_addr_gid_device_scan, work); 812 813 dev_put(work->gid_attr.ndev); 814 kfree(work); 815 } 816 817 static int addr_event(struct notifier_block *this, unsigned long event, 818 struct sockaddr *sa, struct net_device *ndev) 819 { 820 struct update_gid_event_work *work; 821 enum gid_op_type gid_op; 822 823 if (ndev->type != ARPHRD_ETHER) 824 return NOTIFY_DONE; 825 826 switch (event) { 827 case NETDEV_UP: 828 gid_op = GID_ADD; 829 break; 830 831 case NETDEV_DOWN: 832 gid_op = GID_DEL; 833 break; 834 835 default: 836 return NOTIFY_DONE; 837 } 838 839 work = kmalloc(sizeof(*work), GFP_ATOMIC); 840 if (!work) 841 return NOTIFY_DONE; 842 843 INIT_WORK(&work->work, update_gid_event_work_handler); 844 845 rdma_ip2gid(sa, &work->gid); 846 work->gid_op = gid_op; 847 848 memset(&work->gid_attr, 0, sizeof(work->gid_attr)); 849 dev_hold(ndev); 850 work->gid_attr.ndev = ndev; 851 852 queue_work(gid_cache_wq, &work->work); 853 854 return NOTIFY_DONE; 855 } 856 857 static int inetaddr_event(struct notifier_block *this, unsigned long event, 858 void *ptr) 859 { 860 struct sockaddr_in in; 861 struct net_device *ndev; 862 struct in_ifaddr *ifa = ptr; 863 864 in.sin_family = AF_INET; 865 in.sin_addr.s_addr = ifa->ifa_address; 866 ndev = ifa->ifa_dev->dev; 867 868 return addr_event(this, event, (struct sockaddr *)&in, ndev); 869 } 870 871 static int inet6addr_event(struct notifier_block *this, unsigned long event, 872 void *ptr) 873 { 874 struct sockaddr_in6 in6; 875 struct net_device *ndev; 876 struct inet6_ifaddr *ifa6 = ptr; 877 878 in6.sin6_family = AF_INET6; 879 in6.sin6_addr = ifa6->addr; 880 ndev = ifa6->idev->dev; 881 882 return addr_event(this, event, (struct sockaddr *)&in6, ndev); 883 } 884 885 static struct notifier_block nb_netdevice = { 886 .notifier_call = netdevice_event 887 }; 888 889 static struct notifier_block nb_inetaddr = { 890 .notifier_call = inetaddr_event 891 }; 892 893 static struct notifier_block nb_inet6addr = { 894 .notifier_call = inet6addr_event 895 }; 896 897 int __init roce_gid_mgmt_init(void) 898 { 899 gid_cache_wq = alloc_ordered_workqueue("gid-cache-wq", 0); 900 if (!gid_cache_wq) 901 return -ENOMEM; 902 903 register_inetaddr_notifier(&nb_inetaddr); 904 if (IS_ENABLED(CONFIG_IPV6)) 905 register_inet6addr_notifier(&nb_inet6addr); 906 /* We relay on the netdevice notifier to enumerate all 907 * existing devices in the system. Register to this notifier 908 * last to make sure we will not miss any IP add/del 909 * callbacks. 910 */ 911 register_netdevice_notifier(&nb_netdevice); 912 913 return 0; 914 } 915 916 void __exit roce_gid_mgmt_cleanup(void) 917 { 918 if (IS_ENABLED(CONFIG_IPV6)) 919 unregister_inet6addr_notifier(&nb_inet6addr); 920 unregister_inetaddr_notifier(&nb_inetaddr); 921 unregister_netdevice_notifier(&nb_netdevice); 922 /* Ensure all gid deletion tasks complete before we go down, 923 * to avoid any reference to free'd memory. By the time 924 * ib-core is removed, all physical devices have been removed, 925 * so no issue with remaining hardware contexts. 926 */ 927 destroy_workqueue(gid_cache_wq); 928 } 929