drivers/infiniband/core/roce_gid_mgmt.c

   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
 257         if (!rdma_ndev)
 258                 return;
 259
 260         if (!real_dev)
 261                 real_dev = event_ndev;
 262
 263         rcu_read_lock();
 264
 265         if (rdma_is_upper_dev_rcu(rdma_ndev, event_ndev) &&
 266             is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) ==
 267             BONDING_SLAVE_STATE_INACTIVE) {
 268                 unsigned long gid_type_mask;
 269
 270                 rcu_read_unlock();
 271
 272                 gid_type_mask = roce_gid_type_mask_support(ib_dev, port);
 273
 274                 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev,
 275                                              gid_type_mask,
 276                                              IB_CACHE_GID_DEFAULT_MODE_DELETE);
 277         } else {
 278                 rcu_read_unlock();
 279         }
 280 }
 281
 282 static void enum_netdev_ipv4_ips(struct ib_device *ib_dev,
 283                                  u8 port, struct net_device *ndev)
 284 {
 285         struct in_device *in_dev;
 286         struct sin_list {
 287                 struct list_head        list;
 288                 struct sockaddr_in      ip;
 289         };
 290         struct sin_list *sin_iter;
 291         struct sin_list *sin_temp;
 292
 293         LIST_HEAD(sin_list);
 294         if (ndev->reg_state >= NETREG_UNREGISTERING)
 295                 return;
 296
 297         rcu_read_lock();
 298         in_dev = __in_dev_get_rcu(ndev);
 299         if (!in_dev) {
 300                 rcu_read_unlock();
 301                 return;
 302         }
 303
 304         for_ifa(in_dev) {
 305                 struct sin_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 306
 307                 if (!entry)
 308                         continue;
 309
 310                 entry->ip.sin_family = AF_INET;
 311                 entry->ip.sin_addr.s_addr = ifa->ifa_address;
 312                 list_add_tail(&entry->list, &sin_list);
 313         }
 314         endfor_ifa(in_dev);
 315         rcu_read_unlock();
 316
 317         list_for_each_entry_safe(sin_iter, sin_temp, &sin_list, list) {
 318                 update_gid_ip(GID_ADD, ib_dev, port, ndev,
 319                               (struct sockaddr *)&sin_iter->ip);
 320                 list_del(&sin_iter->list);
 321                 kfree(sin_iter);
 322         }
 323 }
 324
 325 static void enum_netdev_ipv6_ips(struct ib_device *ib_dev,
 326                                  u8 port, struct net_device *ndev)
 327 {
 328         struct inet6_ifaddr *ifp;
 329         struct inet6_dev *in6_dev;
 330         struct sin6_list {
 331                 struct list_head        list;
 332                 struct sockaddr_in6     sin6;
 333         };
 334         struct sin6_list *sin6_iter;
 335         struct sin6_list *sin6_temp;
 336         struct ib_gid_attr gid_attr = {.ndev = ndev};
 337         LIST_HEAD(sin6_list);
 338
 339         if (ndev->reg_state >= NETREG_UNREGISTERING)
 340                 return;
 341
 342         in6_dev = in6_dev_get(ndev);
 343         if (!in6_dev)
 344                 return;
 345
 346         read_lock_bh(&in6_dev->lock);
 347         list_for_each_entry(ifp, &in6_dev->addr_list, if_list) {
 348                 struct sin6_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 349
 350                 if (!entry)
 351                         continue;
 352
 353                 entry->sin6.sin6_family = AF_INET6;
 354                 entry->sin6.sin6_addr = ifp->addr;
 355                 list_add_tail(&entry->list, &sin6_list);
 356         }
 357         read_unlock_bh(&in6_dev->lock);
 358
 359         in6_dev_put(in6_dev);
 360
 361         list_for_each_entry_safe(sin6_iter, sin6_temp, &sin6_list, list) {
 362                 union ib_gid    gid;
 363
 364                 rdma_ip2gid((struct sockaddr *)&sin6_iter->sin6, &gid);
 365                 update_gid(GID_ADD, ib_dev, port, &gid, &gid_attr);
 366                 list_del(&sin6_iter->list);
 367                 kfree(sin6_iter);
 368         }
 369 }
 370
 371 static void _add_netdev_ips(struct ib_device *ib_dev, u8 port,
 372                             struct net_device *ndev)
 373 {
 374         enum_netdev_ipv4_ips(ib_dev, port, ndev);
 375         if (IS_ENABLED(CONFIG_IPV6))
 376                 enum_netdev_ipv6_ips(ib_dev, port, ndev);
 377 }
 378
 379 static void add_netdev_ips(struct ib_device *ib_dev, u8 port,
 380                            struct net_device *rdma_ndev, void *cookie)
 381 {
 382         enum_netdev_default_gids(ib_dev, port, cookie, rdma_ndev);
 383         _add_netdev_ips(ib_dev, port, cookie);
 384 }
 385
 386 static void del_netdev_ips(struct ib_device *ib_dev, u8 port,
 387                            struct net_device *rdma_ndev, void *cookie)
 388 {
 389         ib_cache_gid_del_all_netdev_gids(ib_dev, port, cookie);
 390 }
 391
 392 static void enum_all_gids_of_dev_cb(struct ib_device *ib_dev,
 393                                     u8 port,
 394                                     struct net_device *rdma_ndev,
 395                                     void *cookie)
 396 {
 397         struct net *net;
 398         struct net_device *ndev;
 399
 400         /* Lock the rtnl to make sure the netdevs does not move under
 401          * our feet
 402          */
 403         rtnl_lock();
 404         for_each_net(net)
 405                 for_each_netdev(net, ndev)
 406                         if (is_eth_port_of_netdev(ib_dev, port, rdma_ndev, ndev))
 407                                 add_netdev_ips(ib_dev, port, rdma_ndev, ndev);
 408         rtnl_unlock();
 409 }
 410
 411 /* This function will rescan all of the network devices in the system
 412  * and add their gids, as needed, to the relevant RoCE devices. */
 413 int roce_rescan_device(struct ib_device *ib_dev)
 414 {
 415         ib_enum_roce_netdev(ib_dev, pass_all_filter, NULL,
 416                             enum_all_gids_of_dev_cb, NULL);
 417
 418         return 0;
 419 }
 420
 421 static void callback_for_addr_gid_device_scan(struct ib_device *device,
 422                                               u8 port,
 423                                               struct net_device *rdma_ndev,
 424                                               void *cookie)
 425 {
 426         struct update_gid_event_work *parsed = cookie;
 427
 428         return update_gid(parsed->gid_op, device,
 429                           port, &parsed->gid,
 430                           &parsed->gid_attr);
 431 }
 432
 433 struct upper_list {
 434         struct list_head list;
 435         struct net_device *upper;
 436 };
 437
 438 static int netdev_upper_walk(struct net_device *upper, void *data)
 439 {
 440         struct upper_list *entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
 441         struct list_head *upper_list = data;
 442
 443         if (!entry)
 444                 return 0;
 445
 446         list_add_tail(&entry->list, upper_list);
 447         dev_hold(upper);
 448         entry->upper = upper;
 449
 450         return 0;
 451 }
 452
 453 static void handle_netdev_upper(struct ib_device *ib_dev, u8 port,
 454                                 void *cookie,
 455                                 void (*handle_netdev)(struct ib_device *ib_dev,
 456                                                       u8 port,
 457                                                       struct net_device *ndev))
 458 {
 459         struct net_device *ndev = cookie;
 460         struct upper_list *upper_iter;
 461         struct upper_list *upper_temp;
 462         LIST_HEAD(upper_list);
 463
 464         rcu_read_lock();
 465         netdev_walk_all_upper_dev_rcu(ndev, netdev_upper_walk, &upper_list);
 466         rcu_read_unlock();
 467
 468         handle_netdev(ib_dev, port, ndev);
 469         list_for_each_entry_safe(upper_iter, upper_temp, &upper_list,
 470                                  list) {
 471                 handle_netdev(ib_dev, port, upper_iter->upper);
 472                 dev_put(upper_iter->upper);
 473                 list_del(&upper_iter->list);
 474                 kfree(upper_iter);
 475         }
 476 }
 477
 478 static void _roce_del_all_netdev_gids(struct ib_device *ib_dev, u8 port,
 479                                       struct net_device *event_ndev)
 480 {
 481         ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev);
 482 }
 483
 484 static void del_netdev_upper_ips(struct ib_device *ib_dev, u8 port,
 485                                  struct net_device *rdma_ndev, void *cookie)
 486 {
 487         handle_netdev_upper(ib_dev, port, cookie, _roce_del_all_netdev_gids);
 488 }
 489
 490 static void add_netdev_upper_ips(struct ib_device *ib_dev, u8 port,
 491                                  struct net_device *rdma_ndev, void *cookie)
 492 {
 493         handle_netdev_upper(ib_dev, port, cookie, _add_netdev_ips);
 494 }
 495
 496 static void del_netdev_default_ips_join(struct ib_device *ib_dev, u8 port,
 497                                         struct net_device *rdma_ndev,
 498                                         void *cookie)
 499 {
 500         struct net_device *master_ndev;
 501
 502         rcu_read_lock();
 503         master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev);
 504         if (master_ndev)
 505                 dev_hold(master_ndev);
 506         rcu_read_unlock();
 507
 508         if (master_ndev) {
 509                 bond_delete_netdev_default_gids(ib_dev, port, master_ndev,
 510                                                 rdma_ndev);
 511                 dev_put(master_ndev);
 512         }
 513 }
 514
 515 static void del_netdev_default_ips(struct ib_device *ib_dev, u8 port,
 516                                    struct net_device *rdma_ndev, void *cookie)
 517 {
 518         bond_delete_netdev_default_gids(ib_dev, port, cookie, rdma_ndev);
 519 }
 520
 521 /* The following functions operate on all IB devices. netdevice_event and
 522  * addr_event execute ib_enum_all_roce_netdevs through a work.
 523  * ib_enum_all_roce_netdevs iterates through all IB devices.
 524  */
 525
 526 static void netdevice_event_work_handler(struct work_struct *_work)
 527 {
 528         struct netdev_event_work *work =
 529                 container_of(_work, struct netdev_event_work, work);
 530         unsigned int i;
 531
 532         for (i = 0; i < ARRAY_SIZE(work->cmds) && work->cmds[i].cb; i++) {
 533                 ib_enum_all_roce_netdevs(work->cmds[i].filter,
 534                                          work->cmds[i].filter_ndev,
 535                                          work->cmds[i].cb,
 536                                          work->cmds[i].ndev);
 537                 dev_put(work->cmds[i].ndev);
 538                 dev_put(work->cmds[i].filter_ndev);
 539         }
 540
 541         kfree(work);
 542 }
 543
 544 static int netdevice_queue_work(struct netdev_event_work_cmd *cmds,
 545                                 struct net_device *ndev)
 546 {
 547         unsigned int i;
 548         struct netdev_event_work *ndev_work =
 549                 kmalloc(sizeof(*ndev_work), GFP_KERNEL);
 550
 551         if (!ndev_work)
 552                 return NOTIFY_DONE;
 553
 554         memcpy(ndev_work->cmds, cmds, sizeof(ndev_work->cmds));
 555         for (i = 0; i < ARRAY_SIZE(ndev_work->cmds) && ndev_work->cmds[i].cb; i++) {
 556                 if (!ndev_work->cmds[i].ndev)
 557                         ndev_work->cmds[i].ndev = ndev;
 558                 if (!ndev_work->cmds[i].filter_ndev)
 559                         ndev_work->cmds[i].filter_ndev = ndev;
 560                 dev_hold(ndev_work->cmds[i].ndev);
 561                 dev_hold(ndev_work->cmds[i].filter_ndev);
 562         }
 563         INIT_WORK(&ndev_work->work, netdevice_event_work_handler);
 564
 565         queue_work(gid_cache_wq, &ndev_work->work);
 566
 567         return NOTIFY_DONE;
 568 }
 569
 570 static const struct netdev_event_work_cmd add_cmd = {
 571         .cb = add_netdev_ips, .filter = is_eth_port_of_netdev};
 572 static const struct netdev_event_work_cmd add_cmd_upper_ips = {
 573         .cb = add_netdev_upper_ips, .filter = is_eth_port_of_netdev};
 574
 575 static void netdevice_event_changeupper(struct netdev_notifier_changeupper_info *changeupper_info,
 576                                         struct netdev_event_work_cmd *cmds)
 577 {
 578         static const struct netdev_event_work_cmd upper_ips_del_cmd = {
 579                 .cb = del_netdev_upper_ips, .filter = upper_device_filter};
 580         static const struct netdev_event_work_cmd bonding_default_del_cmd = {
 581                 .cb = del_netdev_default_ips, .filter = is_eth_port_inactive_slave};
 582
 583         if (changeupper_info->linking == false) {
 584                 cmds[0] = upper_ips_del_cmd;
 585                 cmds[0].ndev = changeupper_info->upper_dev;
 586                 cmds[1] = add_cmd;
 587         } else {
 588                 cmds[0] = bonding_default_del_cmd;
 589                 cmds[0].ndev = changeupper_info->upper_dev;
 590                 cmds[1] = add_cmd_upper_ips;
 591                 cmds[1].ndev = changeupper_info->upper_dev;
 592                 cmds[1].filter_ndev = changeupper_info->upper_dev;
 593         }
 594 }
 595
 596 static int netdevice_event(struct notifier_block *this, unsigned long event,
 597                            void *ptr)
 598 {
 599         static const struct netdev_event_work_cmd del_cmd = {
 600                 .cb = del_netdev_ips, .filter = pass_all_filter};
 601         static const struct netdev_event_work_cmd bonding_default_del_cmd_join = {
 602                 .cb = del_netdev_default_ips_join, .filter = is_eth_port_inactive_slave};
 603         static const struct netdev_event_work_cmd default_del_cmd = {
 604                 .cb = del_netdev_default_ips, .filter = pass_all_filter};
 605         static const struct netdev_event_work_cmd bonding_event_ips_del_cmd = {
 606                 .cb = del_netdev_upper_ips, .filter = upper_device_filter};
 607         struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
 608         struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ] = { {NULL} };
 609
 610         if (ndev->type != ARPHRD_ETHER)
 611                 return NOTIFY_DONE;
 612
 613         switch (event) {
 614         case NETDEV_REGISTER:
 615         case NETDEV_UP:
 616                 cmds[0] = bonding_default_del_cmd_join;
 617                 cmds[1] = add_cmd;
 618                 break;
 619
 620         case NETDEV_UNREGISTER:
 621                 if (ndev->reg_state < NETREG_UNREGISTERED)
 622                         cmds[0] = del_cmd;
 623                 else
 624                         return NOTIFY_DONE;
 625                 break;
 626
 627         case NETDEV_CHANGEADDR:
 628                 cmds[0] = default_del_cmd;
 629                 cmds[1] = add_cmd;
 630                 break;
 631
 632         case NETDEV_CHANGEUPPER:
 633                 netdevice_event_changeupper(
 634                         container_of(ptr, struct netdev_notifier_changeupper_info, info),
 635                         cmds);
 636                 break;
 637
 638         case NETDEV_BONDING_FAILOVER:
 639                 cmds[0] = bonding_event_ips_del_cmd;
 640                 cmds[1] = bonding_default_del_cmd_join;
 641                 cmds[2] = add_cmd_upper_ips;
 642                 break;
 643
 644         default:
 645                 return NOTIFY_DONE;
 646         }
 647
 648         return netdevice_queue_work(cmds, ndev);
 649 }
 650
 651 static void update_gid_event_work_handler(struct work_struct *_work)
 652 {
 653         struct update_gid_event_work *work =
 654                 container_of(_work, struct update_gid_event_work, work);
 655
 656         ib_enum_all_roce_netdevs(is_eth_port_of_netdev, work->gid_attr.ndev,
 657                                  callback_for_addr_gid_device_scan, work);
 658
 659         dev_put(work->gid_attr.ndev);
 660         kfree(work);
 661 }
 662
 663 static int addr_event(struct notifier_block *this, unsigned long event,
 664                       struct sockaddr *sa, struct net_device *ndev)
 665 {
 666         struct update_gid_event_work *work;
 667         enum gid_op_type gid_op;
 668
 669         if (ndev->type != ARPHRD_ETHER)
 670                 return NOTIFY_DONE;
 671
 672         switch (event) {
 673         case NETDEV_UP:
 674                 gid_op = GID_ADD;
 675                 break;
 676
 677         case NETDEV_DOWN:
 678                 gid_op = GID_DEL;
 679                 break;
 680
 681         default:
 682                 return NOTIFY_DONE;
 683         }
 684
 685         work = kmalloc(sizeof(*work), GFP_ATOMIC);
 686         if (!work)
 687                 return NOTIFY_DONE;
 688
 689         INIT_WORK(&work->work, update_gid_event_work_handler);
 690
 691         rdma_ip2gid(sa, &work->gid);
 692         work->gid_op = gid_op;
 693
 694         memset(&work->gid_attr, 0, sizeof(work->gid_attr));
 695         dev_hold(ndev);
 696         work->gid_attr.ndev   = ndev;
 697
 698         queue_work(gid_cache_wq, &work->work);
 699
 700         return NOTIFY_DONE;
 701 }
 702
 703 static int inetaddr_event(struct notifier_block *this, unsigned long event,
 704                           void *ptr)
 705 {
 706         struct sockaddr_in      in;
 707         struct net_device       *ndev;
 708         struct in_ifaddr        *ifa = ptr;
 709
 710         in.sin_family = AF_INET;
 711         in.sin_addr.s_addr = ifa->ifa_address;
 712         ndev = ifa->ifa_dev->dev;
 713
 714         return addr_event(this, event, (struct sockaddr *)&in, ndev);
 715 }
 716
 717 static int inet6addr_event(struct notifier_block *this, unsigned long event,
 718                            void *ptr)
 719 {
 720         struct sockaddr_in6     in6;
 721         struct net_device       *ndev;
 722         struct inet6_ifaddr     *ifa6 = ptr;
 723
 724         in6.sin6_family = AF_INET6;
 725         in6.sin6_addr = ifa6->addr;
 726         ndev = ifa6->idev->dev;
 727
 728         return addr_event(this, event, (struct sockaddr *)&in6, ndev);
 729 }
 730
 731 static struct notifier_block nb_netdevice = {
 732         .notifier_call = netdevice_event
 733 };
 734
 735 static struct notifier_block nb_inetaddr = {
 736         .notifier_call = inetaddr_event
 737 };
 738
 739 static struct notifier_block nb_inet6addr = {
 740         .notifier_call = inet6addr_event
 741 };
 742
 743 int __init roce_gid_mgmt_init(void)
 744 {
 745         gid_cache_wq = alloc_ordered_workqueue("gid-cache-wq", 0);
 746         if (!gid_cache_wq)
 747                 return -ENOMEM;
 748
 749         register_inetaddr_notifier(&nb_inetaddr);
 750         if (IS_ENABLED(CONFIG_IPV6))
 751                 register_inet6addr_notifier(&nb_inet6addr);
 752         /* We relay on the netdevice notifier to enumerate all
 753          * existing devices in the system. Register to this notifier
 754          * last to make sure we will not miss any IP add/del
 755          * callbacks.
 756          */
 757         register_netdevice_notifier(&nb_netdevice);
 758
 759         return 0;
 760 }
 761
 762 void __exit roce_gid_mgmt_cleanup(void)
 763 {
 764         if (IS_ENABLED(CONFIG_IPV6))
 765                 unregister_inet6addr_notifier(&nb_inet6addr);
 766         unregister_inetaddr_notifier(&nb_inetaddr);
 767         unregister_netdevice_notifier(&nb_netdevice);
 768         /* Ensure all gid deletion tasks complete before we go down,
 769          * to avoid any reference to free'd memory. By the time
 770          * ib-core is removed, all physical devices have been removed,
 771          * so no issue with remaining hardware contexts.
 772          */
 773         destroy_workqueue(gid_cache_wq);
 774 }