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 enum gid_op_type {
  46         GID_DEL = 0,
  47         GID_ADD
  48 };
  49
  50 struct update_gid_event_work {
  51         struct work_struct work;
  52         union ib_gid       gid;
  53         struct ib_gid_attr gid_attr;
  54         enum gid_op_type gid_op;
  55 };
  56
  57 #define ROCE_NETDEV_CALLBACK_SZ         3
  58 struct netdev_event_work_cmd {
  59         roce_netdev_callback    cb;
  60         roce_netdev_filter      filter;
  61         struct net_device       *ndev;
  62         struct net_device       *filter_ndev;
  63 };
  64
  65 struct netdev_event_work {
  66         struct work_struct              work;
  67         struct netdev_event_work_cmd    cmds[ROCE_NETDEV_CALLBACK_SZ];
  68 };
  69
  70 static const struct {
  71         bool (*is_supported)(const struct ib_device *device, u8 port_num);
  72         enum ib_gid_type gid_type;
  73 } PORT_CAP_TO_GID_TYPE[] = {
  74         {rdma_protocol_roce_eth_encap, IB_GID_TYPE_ROCE},
  75         {rdma_protocol_roce_udp_encap, IB_GID_TYPE_ROCE_UDP_ENCAP},
  76 };
  77
  78 #define CAP_TO_GID_TABLE_SIZE   ARRAY_SIZE(PORT_CAP_TO_GID_TYPE)
  79
  80 unsigned long roce_gid_type_mask_support(struct ib_device *ib_dev, u8 port)
  81 {
  82         int i;
  83         unsigned int ret_flags = 0;
  84
  85         if (!rdma_protocol_roce(ib_dev, port))
  86                 return 1UL << IB_GID_TYPE_IB;
  87
  88         for (i = 0; i < CAP_TO_GID_TABLE_SIZE; i++)
  89                 if (PORT_CAP_TO_GID_TYPE[i].is_supported(ib_dev, port))
  90                         ret_flags |= 1UL << PORT_CAP_TO_GID_TYPE[i].gid_type;
  91
  92         return ret_flags;
  93 }
  94 EXPORT_SYMBOL(roce_gid_type_mask_support);
  95
  96 static void update_gid(enum gid_op_type gid_op, struct ib_device *ib_dev,
  97                        u8 port, union ib_gid *gid,
  98                        struct ib_gid_attr *gid_attr)
  99 {
 100         int i;
 101         unsigned long gid_type_mask = roce_gid_type_mask_support(ib_dev, port);
 102
 103         for (i = 0; i < IB_GID_TYPE_SIZE; i++) {
 104                 if ((1UL << i) & gid_type_mask) {
 105                         gid_attr->gid_type = i;
 106                         switch (gid_op) {
 107                         case GID_ADD:
 108                                 ib_cache_gid_add(ib_dev, port,
 109                                                  gid, gid_attr);
 110                                 break;
 111                         case GID_DEL:
 112                                 ib_cache_gid_del(ib_dev, port,
 113                                                  gid, gid_attr);
 114                                 break;
 115                         }
 116                 }
 117         }
 118 }
 119
 120 enum bonding_slave_state {
 121         BONDING_SLAVE_STATE_ACTIVE      = 1UL << 0,
 122         BONDING_SLAVE_STATE_INACTIVE    = 1UL << 1,
 123         /* No primary slave or the device isn't a slave in bonding */
 124         BONDING_SLAVE_STATE_NA          = 1UL << 2,
 125 };
 126
 127 static enum bonding_slave_state is_eth_active_slave_of_bonding_rcu(struct net_device *dev,
 128                                                                    struct net_device *upper)
 129 {
 130         if (upper && netif_is_bond_master(upper)) {
 131                 struct net_device *pdev =
 132                         bond_option_active_slave_get_rcu(netdev_priv(upper));
 133
 134                 if (pdev)
 135                         return dev == pdev ? BONDING_SLAVE_STATE_ACTIVE :
 136                                 BONDING_SLAVE_STATE_INACTIVE;
 137         }
 138
 139         return BONDING_SLAVE_STATE_NA;
 140 }
 141
 142 #define REQUIRED_BOND_STATES            (BONDING_SLAVE_STATE_ACTIVE |   \
 143                                          BONDING_SLAVE_STATE_NA)
 144 static int is_eth_port_of_netdev(struct ib_device *ib_dev, u8 port,
 145                                  struct net_device *rdma_ndev, void *cookie)
 146 {
 147         struct net_device *real_dev;
 148         int res;
 149
 150         if (!rdma_ndev)
 151                 return 0;
 152
 153         rcu_read_lock();
 154         real_dev = rdma_vlan_dev_real_dev(cookie);
 155         if (!real_dev)
 156                 real_dev = cookie;
 157
 158         res = ((rdma_is_upper_dev_rcu(rdma_ndev, cookie) &&
 159                (is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) &
 160                 REQUIRED_BOND_STATES)) ||
 161                real_dev == rdma_ndev);
 162
 163         rcu_read_unlock();
 164         return res;
 165 }
 166
 167 static int is_eth_port_inactive_slave(struct ib_device *ib_dev, u8 port,
 168                                       struct net_device *rdma_ndev, void *cookie)
 169 {
 170         struct net_device *master_dev;
 171         int res;
 172
 173         if (!rdma_ndev)
 174                 return 0;
 175
 176         rcu_read_lock();
 177         master_dev = netdev_master_upper_dev_get_rcu(rdma_ndev);
 178         res = is_eth_active_slave_of_bonding_rcu(rdma_ndev, master_dev) ==
 179                 BONDING_SLAVE_STATE_INACTIVE;
 180         rcu_read_unlock();
 181
 182         return res;
 183 }
 184
 185 static int pass_all_filter(struct ib_device *ib_dev, u8 port,
 186                            struct net_device *rdma_ndev, void *cookie)
 187 {
 188         return 1;
 189 }
 190
 191 static int upper_device_filter(struct ib_device *ib_dev, u8 port,
 192                                struct net_device *rdma_ndev, void *cookie)
 193 {
 194         int res;
 195
 196         if (!rdma_ndev)
 197                 return 0;
 198
 199         if (rdma_ndev == cookie)
 200                 return 1;
 201
 202         rcu_read_lock();
 203         res = rdma_is_upper_dev_rcu(rdma_ndev, cookie);
 204         rcu_read_unlock();
 205
 206         return res;
 207 }
 208
 209 static void update_gid_ip(enum gid_op_type gid_op,
 210                           struct ib_device *ib_dev,
 211                           u8 port, struct net_device *ndev,
 212                           struct sockaddr *addr)
 213 {
 214         union ib_gid gid;
 215         struct ib_gid_attr gid_attr;
 216
 217         rdma_ip2gid(addr, &gid);
 218         memset(&gid_attr, 0, sizeof(gid_attr));
 219         gid_attr.ndev = ndev;
 220
 221         update_gid(gid_op, ib_dev, port, &gid, &gid_attr);
 222 }
 223
 224 static void enum_netdev_default_gids(struct ib_device *ib_dev,
 225                                      u8 port, struct net_device *event_ndev,
 226                                      struct net_device *rdma_ndev)
 227 {
 228         unsigned long gid_type_mask;
 229
 230         rcu_read_lock();
 231         if (!rdma_ndev ||
 232             ((rdma_ndev != event_ndev &&
 233               !rdma_is_upper_dev_rcu(rdma_ndev, event_ndev)) ||
 234              is_eth_active_slave_of_bonding_rcu(rdma_ndev,
 235                                                 netdev_master_upper_dev_get_rcu(rdma_ndev)) ==
 236              BONDING_SLAVE_STATE_INACTIVE)) {
 237                 rcu_read_unlock();
 238                 return;
 239         }
 240         rcu_read_unlock();
 241
 242         gid_type_mask = roce_gid_type_mask_support(ib_dev, port);
 243
 244         ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, gid_type_mask,
 245                                      IB_CACHE_GID_DEFAULT_MODE_SET);
 246 }
 247
 248 static void bond_delete_netdev_default_gids(struct ib_device *ib_dev,
 249                                             u8 port,
 250                                             struct net_device *event_ndev,
 251                                             struct net_device *rdma_ndev)
 252 {
 253         struct net_device *real_dev = rdma_vlan_dev_real_dev(event_ndev);
 254
 255         if (!rdma_ndev)
 256                 return;
 257
 258         if (!real_dev)
 259                 real_dev = event_ndev;
 260
 261         rcu_read_lock();
 262
 263         if (rdma_is_upper_dev_rcu(rdma_ndev, event_ndev) &&
 264             is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) ==
 265             BONDING_SLAVE_STATE_INACTIVE) {
 266                 unsigned long gid_type_mask;
 267
 268                 rcu_read_unlock();
 269
 270                 gid_type_mask = roce_gid_type_mask_support(ib_dev, port);
 271
 272                 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev,
 273                                              gid_type_mask,
 274                                              IB_CACHE_GID_DEFAULT_MODE_DELETE);
 275         } else {
 276                 rcu_read_unlock();
 277         }
 278 }
 279
 280 static void enum_netdev_ipv4_ips(struct ib_device *ib_dev,
 281                                  u8 port, struct net_device *ndev)
 282 {
 283         struct in_device *in_dev;
 284         struct sin_list {
 285                 struct list_head        list;
 286                 struct sockaddr_in      ip;
 287         };
 288         struct sin_list *sin_iter;
 289         struct sin_list *sin_temp;
 290
 291         LIST_HEAD(sin_list);
 292         if (ndev->reg_state >= NETREG_UNREGISTERING)
 293                 return;
 294
 295         rcu_read_lock();
 296         in_dev = __in_dev_get_rcu(ndev);
 297         if (!in_dev) {
 298                 rcu_read_unlock();
 299                 return;
 300         }
 301
 302         for_ifa(in_dev) {
 303                 struct sin_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 304
 305                 if (!entry)
 306                         continue;
 307
 308                 entry->ip.sin_family = AF_INET;
 309                 entry->ip.sin_addr.s_addr = ifa->ifa_address;
 310                 list_add_tail(&entry->list, &sin_list);
 311         }
 312         endfor_ifa(in_dev);
 313         rcu_read_unlock();
 314
 315         list_for_each_entry_safe(sin_iter, sin_temp, &sin_list, list) {
 316                 update_gid_ip(GID_ADD, ib_dev, port, ndev,
 317                               (struct sockaddr *)&sin_iter->ip);
 318                 list_del(&sin_iter->list);
 319                 kfree(sin_iter);
 320         }
 321 }
 322
 323 static void enum_netdev_ipv6_ips(struct ib_device *ib_dev,
 324                                  u8 port, struct net_device *ndev)
 325 {
 326         struct inet6_ifaddr *ifp;
 327         struct inet6_dev *in6_dev;
 328         struct sin6_list {
 329                 struct list_head        list;
 330                 struct sockaddr_in6     sin6;
 331         };
 332         struct sin6_list *sin6_iter;
 333         struct sin6_list *sin6_temp;
 334         struct ib_gid_attr gid_attr = {.ndev = ndev};
 335         LIST_HEAD(sin6_list);
 336
 337         if (ndev->reg_state >= NETREG_UNREGISTERING)
 338                 return;
 339
 340         in6_dev = in6_dev_get(ndev);
 341         if (!in6_dev)
 342                 return;
 343
 344         read_lock_bh(&in6_dev->lock);
 345         list_for_each_entry(ifp, &in6_dev->addr_list, if_list) {
 346                 struct sin6_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 347
 348                 if (!entry)
 349                         continue;
 350
 351                 entry->sin6.sin6_family = AF_INET6;
 352                 entry->sin6.sin6_addr = ifp->addr;
 353                 list_add_tail(&entry->list, &sin6_list);
 354         }
 355         read_unlock_bh(&in6_dev->lock);
 356
 357         in6_dev_put(in6_dev);
 358
 359         list_for_each_entry_safe(sin6_iter, sin6_temp, &sin6_list, list) {
 360                 union ib_gid    gid;
 361
 362                 rdma_ip2gid((struct sockaddr *)&sin6_iter->sin6, &gid);
 363                 update_gid(GID_ADD, ib_dev, port, &gid, &gid_attr);
 364                 list_del(&sin6_iter->list);
 365                 kfree(sin6_iter);
 366         }
 367 }
 368
 369 static void _add_netdev_ips(struct ib_device *ib_dev, u8 port,
 370                             struct net_device *ndev)
 371 {
 372         enum_netdev_ipv4_ips(ib_dev, port, ndev);
 373         if (IS_ENABLED(CONFIG_IPV6))
 374                 enum_netdev_ipv6_ips(ib_dev, port, ndev);
 375 }
 376
 377 static void add_netdev_ips(struct ib_device *ib_dev, u8 port,
 378                            struct net_device *rdma_ndev, void *cookie)
 379 {
 380         enum_netdev_default_gids(ib_dev, port, cookie, rdma_ndev);
 381         _add_netdev_ips(ib_dev, port, cookie);
 382 }
 383
 384 static void del_netdev_ips(struct ib_device *ib_dev, u8 port,
 385                            struct net_device *rdma_ndev, void *cookie)
 386 {
 387         ib_cache_gid_del_all_netdev_gids(ib_dev, port, cookie);
 388 }
 389
 390 static void enum_all_gids_of_dev_cb(struct ib_device *ib_dev,
 391                                     u8 port,
 392                                     struct net_device *rdma_ndev,
 393                                     void *cookie)
 394 {
 395         struct net *net;
 396         struct net_device *ndev;
 397
 398         /* Lock the rtnl to make sure the netdevs does not move under
 399          * our feet
 400          */
 401         rtnl_lock();
 402         for_each_net(net)
 403                 for_each_netdev(net, ndev)
 404                         if (is_eth_port_of_netdev(ib_dev, port, rdma_ndev, ndev))
 405                                 add_netdev_ips(ib_dev, port, rdma_ndev, ndev);
 406         rtnl_unlock();
 407 }
 408
 409 /* This function will rescan all of the network devices in the system
 410  * and add their gids, as needed, to the relevant RoCE devices. */
 411 int roce_rescan_device(struct ib_device *ib_dev)
 412 {
 413         ib_enum_roce_netdev(ib_dev, pass_all_filter, NULL,
 414                             enum_all_gids_of_dev_cb, NULL);
 415
 416         return 0;
 417 }
 418
 419 static void callback_for_addr_gid_device_scan(struct ib_device *device,
 420                                               u8 port,
 421                                               struct net_device *rdma_ndev,
 422                                               void *cookie)
 423 {
 424         struct update_gid_event_work *parsed = cookie;
 425
 426         return update_gid(parsed->gid_op, device,
 427                           port, &parsed->gid,
 428                           &parsed->gid_attr);
 429 }
 430
 431 struct upper_list {
 432         struct list_head list;
 433         struct net_device *upper;
 434 };
 435
 436 static int netdev_upper_walk(struct net_device *upper, void *data)
 437 {
 438         struct upper_list *entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
 439         struct list_head *upper_list = data;
 440
 441         if (!entry)
 442                 return 0;
 443
 444         list_add_tail(&entry->list, upper_list);
 445         dev_hold(upper);
 446         entry->upper = upper;
 447
 448         return 0;
 449 }
 450
 451 static void handle_netdev_upper(struct ib_device *ib_dev, u8 port,
 452                                 void *cookie,
 453                                 void (*handle_netdev)(struct ib_device *ib_dev,
 454                                                       u8 port,
 455                                                       struct net_device *ndev))
 456 {
 457         struct net_device *ndev = cookie;
 458         struct upper_list *upper_iter;
 459         struct upper_list *upper_temp;
 460         LIST_HEAD(upper_list);
 461
 462         rcu_read_lock();
 463         netdev_walk_all_upper_dev_rcu(ndev, netdev_upper_walk, &upper_list);
 464         rcu_read_unlock();
 465
 466         handle_netdev(ib_dev, port, ndev);
 467         list_for_each_entry_safe(upper_iter, upper_temp, &upper_list,
 468                                  list) {
 469                 handle_netdev(ib_dev, port, upper_iter->upper);
 470                 dev_put(upper_iter->upper);
 471                 list_del(&upper_iter->list);
 472                 kfree(upper_iter);
 473         }
 474 }
 475
 476 static void _roce_del_all_netdev_gids(struct ib_device *ib_dev, u8 port,
 477                                       struct net_device *event_ndev)
 478 {
 479         ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev);
 480 }
 481
 482 static void del_netdev_upper_ips(struct ib_device *ib_dev, u8 port,
 483                                  struct net_device *rdma_ndev, void *cookie)
 484 {
 485         handle_netdev_upper(ib_dev, port, cookie, _roce_del_all_netdev_gids);
 486 }
 487
 488 static void add_netdev_upper_ips(struct ib_device *ib_dev, u8 port,
 489                                  struct net_device *rdma_ndev, void *cookie)
 490 {
 491         handle_netdev_upper(ib_dev, port, cookie, _add_netdev_ips);
 492 }
 493
 494 static void del_netdev_default_ips_join(struct ib_device *ib_dev, u8 port,
 495                                         struct net_device *rdma_ndev,
 496                                         void *cookie)
 497 {
 498         struct net_device *master_ndev;
 499
 500         rcu_read_lock();
 501         master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev);
 502         if (master_ndev)
 503                 dev_hold(master_ndev);
 504         rcu_read_unlock();
 505
 506         if (master_ndev) {
 507                 bond_delete_netdev_default_gids(ib_dev, port, master_ndev,
 508                                                 rdma_ndev);
 509                 dev_put(master_ndev);
 510         }
 511 }
 512
 513 static void del_netdev_default_ips(struct ib_device *ib_dev, u8 port,
 514                                    struct net_device *rdma_ndev, void *cookie)
 515 {
 516         bond_delete_netdev_default_gids(ib_dev, port, cookie, rdma_ndev);
 517 }
 518
 519 /* The following functions operate on all IB devices. netdevice_event and
 520  * addr_event execute ib_enum_all_roce_netdevs through a work.
 521  * ib_enum_all_roce_netdevs iterates through all IB devices.
 522  */
 523
 524 static void netdevice_event_work_handler(struct work_struct *_work)
 525 {
 526         struct netdev_event_work *work =
 527                 container_of(_work, struct netdev_event_work, work);
 528         unsigned int i;
 529
 530         for (i = 0; i < ARRAY_SIZE(work->cmds) && work->cmds[i].cb; i++) {
 531                 ib_enum_all_roce_netdevs(work->cmds[i].filter,
 532                                          work->cmds[i].filter_ndev,
 533                                          work->cmds[i].cb,
 534                                          work->cmds[i].ndev);
 535                 dev_put(work->cmds[i].ndev);
 536                 dev_put(work->cmds[i].filter_ndev);
 537         }
 538
 539         kfree(work);
 540 }
 541
 542 static int netdevice_queue_work(struct netdev_event_work_cmd *cmds,
 543                                 struct net_device *ndev)
 544 {
 545         unsigned int i;
 546         struct netdev_event_work *ndev_work =
 547                 kmalloc(sizeof(*ndev_work), GFP_KERNEL);
 548
 549         if (!ndev_work)
 550                 return NOTIFY_DONE;
 551
 552         memcpy(ndev_work->cmds, cmds, sizeof(ndev_work->cmds));
 553         for (i = 0; i < ARRAY_SIZE(ndev_work->cmds) && ndev_work->cmds[i].cb; i++) {
 554                 if (!ndev_work->cmds[i].ndev)
 555                         ndev_work->cmds[i].ndev = ndev;
 556                 if (!ndev_work->cmds[i].filter_ndev)
 557                         ndev_work->cmds[i].filter_ndev = ndev;
 558                 dev_hold(ndev_work->cmds[i].ndev);
 559                 dev_hold(ndev_work->cmds[i].filter_ndev);
 560         }
 561         INIT_WORK(&ndev_work->work, netdevice_event_work_handler);
 562
 563         queue_work(ib_wq, &ndev_work->work);
 564
 565         return NOTIFY_DONE;
 566 }
 567
 568 static const struct netdev_event_work_cmd add_cmd = {
 569         .cb = add_netdev_ips, .filter = is_eth_port_of_netdev};
 570 static const struct netdev_event_work_cmd add_cmd_upper_ips = {
 571         .cb = add_netdev_upper_ips, .filter = is_eth_port_of_netdev};
 572
 573 static void netdevice_event_changeupper(struct netdev_notifier_changeupper_info *changeupper_info,
 574                                         struct netdev_event_work_cmd *cmds)
 575 {
 576         static const struct netdev_event_work_cmd upper_ips_del_cmd = {
 577                 .cb = del_netdev_upper_ips, .filter = upper_device_filter};
 578         static const struct netdev_event_work_cmd bonding_default_del_cmd = {
 579                 .cb = del_netdev_default_ips, .filter = is_eth_port_inactive_slave};
 580
 581         if (changeupper_info->linking == false) {
 582                 cmds[0] = upper_ips_del_cmd;
 583                 cmds[0].ndev = changeupper_info->upper_dev;
 584                 cmds[1] = add_cmd;
 585         } else {
 586                 cmds[0] = bonding_default_del_cmd;
 587                 cmds[0].ndev = changeupper_info->upper_dev;
 588                 cmds[1] = add_cmd_upper_ips;
 589                 cmds[1].ndev = changeupper_info->upper_dev;
 590                 cmds[1].filter_ndev = changeupper_info->upper_dev;
 591         }
 592 }
 593
 594 static int netdevice_event(struct notifier_block *this, unsigned long event,
 595                            void *ptr)
 596 {
 597         static const struct netdev_event_work_cmd del_cmd = {
 598                 .cb = del_netdev_ips, .filter = pass_all_filter};
 599         static const struct netdev_event_work_cmd bonding_default_del_cmd_join = {
 600                 .cb = del_netdev_default_ips_join, .filter = is_eth_port_inactive_slave};
 601         static const struct netdev_event_work_cmd default_del_cmd = {
 602                 .cb = del_netdev_default_ips, .filter = pass_all_filter};
 603         static const struct netdev_event_work_cmd bonding_event_ips_del_cmd = {
 604                 .cb = del_netdev_upper_ips, .filter = upper_device_filter};
 605         struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
 606         struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ] = { {NULL} };
 607
 608         if (ndev->type != ARPHRD_ETHER)
 609                 return NOTIFY_DONE;
 610
 611         switch (event) {
 612         case NETDEV_REGISTER:
 613         case NETDEV_UP:
 614                 cmds[0] = bonding_default_del_cmd_join;
 615                 cmds[1] = add_cmd;
 616                 break;
 617
 618         case NETDEV_UNREGISTER:
 619                 if (ndev->reg_state < NETREG_UNREGISTERED)
 620                         cmds[0] = del_cmd;
 621                 else
 622                         return NOTIFY_DONE;
 623                 break;
 624
 625         case NETDEV_CHANGEADDR:
 626                 cmds[0] = default_del_cmd;
 627                 cmds[1] = add_cmd;
 628                 break;
 629
 630         case NETDEV_CHANGEUPPER:
 631                 netdevice_event_changeupper(
 632                         container_of(ptr, struct netdev_notifier_changeupper_info, info),
 633                         cmds);
 634                 break;
 635
 636         case NETDEV_BONDING_FAILOVER:
 637                 cmds[0] = bonding_event_ips_del_cmd;
 638                 cmds[1] = bonding_default_del_cmd_join;
 639                 cmds[2] = add_cmd_upper_ips;
 640                 break;
 641
 642         default:
 643                 return NOTIFY_DONE;
 644         }
 645
 646         return netdevice_queue_work(cmds, ndev);
 647 }
 648
 649 static void update_gid_event_work_handler(struct work_struct *_work)
 650 {
 651         struct update_gid_event_work *work =
 652                 container_of(_work, struct update_gid_event_work, work);
 653
 654         ib_enum_all_roce_netdevs(is_eth_port_of_netdev, work->gid_attr.ndev,
 655                                  callback_for_addr_gid_device_scan, work);
 656
 657         dev_put(work->gid_attr.ndev);
 658         kfree(work);
 659 }
 660
 661 static int addr_event(struct notifier_block *this, unsigned long event,
 662                       struct sockaddr *sa, struct net_device *ndev)
 663 {
 664         struct update_gid_event_work *work;
 665         enum gid_op_type gid_op;
 666
 667         if (ndev->type != ARPHRD_ETHER)
 668                 return NOTIFY_DONE;
 669
 670         switch (event) {
 671         case NETDEV_UP:
 672                 gid_op = GID_ADD;
 673                 break;
 674
 675         case NETDEV_DOWN:
 676                 gid_op = GID_DEL;
 677                 break;
 678
 679         default:
 680                 return NOTIFY_DONE;
 681         }
 682
 683         work = kmalloc(sizeof(*work), GFP_ATOMIC);
 684         if (!work)
 685                 return NOTIFY_DONE;
 686
 687         INIT_WORK(&work->work, update_gid_event_work_handler);
 688
 689         rdma_ip2gid(sa, &work->gid);
 690         work->gid_op = gid_op;
 691
 692         memset(&work->gid_attr, 0, sizeof(work->gid_attr));
 693         dev_hold(ndev);
 694         work->gid_attr.ndev   = ndev;
 695
 696         queue_work(ib_wq, &work->work);
 697
 698         return NOTIFY_DONE;
 699 }
 700
 701 static int inetaddr_event(struct notifier_block *this, unsigned long event,
 702                           void *ptr)
 703 {
 704         struct sockaddr_in      in;
 705         struct net_device       *ndev;
 706         struct in_ifaddr        *ifa = ptr;
 707
 708         in.sin_family = AF_INET;
 709         in.sin_addr.s_addr = ifa->ifa_address;
 710         ndev = ifa->ifa_dev->dev;
 711
 712         return addr_event(this, event, (struct sockaddr *)&in, ndev);
 713 }
 714
 715 static int inet6addr_event(struct notifier_block *this, unsigned long event,
 716                            void *ptr)
 717 {
 718         struct sockaddr_in6     in6;
 719         struct net_device       *ndev;
 720         struct inet6_ifaddr     *ifa6 = ptr;
 721
 722         in6.sin6_family = AF_INET6;
 723         in6.sin6_addr = ifa6->addr;
 724         ndev = ifa6->idev->dev;
 725
 726         return addr_event(this, event, (struct sockaddr *)&in6, ndev);
 727 }
 728
 729 static struct notifier_block nb_netdevice = {
 730         .notifier_call = netdevice_event
 731 };
 732
 733 static struct notifier_block nb_inetaddr = {
 734         .notifier_call = inetaddr_event
 735 };
 736
 737 static struct notifier_block nb_inet6addr = {
 738         .notifier_call = inet6addr_event
 739 };
 740
 741 int __init roce_gid_mgmt_init(void)
 742 {
 743         register_inetaddr_notifier(&nb_inetaddr);
 744         if (IS_ENABLED(CONFIG_IPV6))
 745                 register_inet6addr_notifier(&nb_inet6addr);
 746         /* We relay on the netdevice notifier to enumerate all
 747          * existing devices in the system. Register to this notifier
 748          * last to make sure we will not miss any IP add/del
 749          * callbacks.
 750          */
 751         register_netdevice_notifier(&nb_netdevice);
 752
 753         return 0;
 754 }
 755
 756 void __exit roce_gid_mgmt_cleanup(void)
 757 {
 758         if (IS_ENABLED(CONFIG_IPV6))
 759                 unregister_inet6addr_notifier(&nb_inet6addr);
 760         unregister_inetaddr_notifier(&nb_inetaddr);
 761         unregister_netdevice_notifier(&nb_netdevice);
 762         /* Ensure all gid deletion tasks complete before we go down,
 763          * to avoid any reference to free'd memory. By the time
 764          * ib-core is removed, all physical devices have been removed,
 765          * so no issue with remaining hardware contexts.
 766          */
 767 }