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 *event_ndev = (struct net_device *)cookie;
 148         struct net_device *real_dev;
 149         int res;
 150
 151         if (!rdma_ndev)
 152                 return 0;
 153
 154         rcu_read_lock();
 155         real_dev = rdma_vlan_dev_real_dev(event_ndev);
 156         if (!real_dev)
 157                 real_dev = event_ndev;
 158
 159         res = ((rdma_is_upper_dev_rcu(rdma_ndev, event_ndev) &&
 160                (is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) &
 161                 REQUIRED_BOND_STATES)) ||
 162                real_dev == rdma_ndev);
 163
 164         rcu_read_unlock();
 165         return res;
 166 }
 167
 168 static int is_eth_port_inactive_slave(struct ib_device *ib_dev, u8 port,
 169                                       struct net_device *rdma_ndev, void *cookie)
 170 {
 171         struct net_device *master_dev;
 172         int res;
 173
 174         if (!rdma_ndev)
 175                 return 0;
 176
 177         rcu_read_lock();
 178         master_dev = netdev_master_upper_dev_get_rcu(rdma_ndev);
 179         res = is_eth_active_slave_of_bonding_rcu(rdma_ndev, master_dev) ==
 180                 BONDING_SLAVE_STATE_INACTIVE;
 181         rcu_read_unlock();
 182
 183         return res;
 184 }
 185
 186 static int pass_all_filter(struct ib_device *ib_dev, u8 port,
 187                            struct net_device *rdma_ndev, void *cookie)
 188 {
 189         return 1;
 190 }
 191
 192 static int upper_device_filter(struct ib_device *ib_dev, u8 port,
 193                                struct net_device *rdma_ndev, void *cookie)
 194 {
 195         struct net_device *event_ndev = (struct net_device *)cookie;
 196         int res;
 197
 198         if (!rdma_ndev)
 199                 return 0;
 200
 201         if (rdma_ndev == event_ndev)
 202                 return 1;
 203
 204         rcu_read_lock();
 205         res = rdma_is_upper_dev_rcu(rdma_ndev, event_ndev);
 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                         pr_warn("roce_gid_mgmt: couldn't allocate entry for IPv4 update\n");
 309                         continue;
 310                 }
 311                 entry->ip.sin_family = AF_INET;
 312                 entry->ip.sin_addr.s_addr = ifa->ifa_address;
 313                 list_add_tail(&entry->list, &sin_list);
 314         }
 315         endfor_ifa(in_dev);
 316         rcu_read_unlock();
 317
 318         list_for_each_entry_safe(sin_iter, sin_temp, &sin_list, list) {
 319                 update_gid_ip(GID_ADD, ib_dev, port, ndev,
 320                               (struct sockaddr *)&sin_iter->ip);
 321                 list_del(&sin_iter->list);
 322                 kfree(sin_iter);
 323         }
 324 }
 325
 326 static void enum_netdev_ipv6_ips(struct ib_device *ib_dev,
 327                                  u8 port, struct net_device *ndev)
 328 {
 329         struct inet6_ifaddr *ifp;
 330         struct inet6_dev *in6_dev;
 331         struct sin6_list {
 332                 struct list_head        list;
 333                 struct sockaddr_in6     sin6;
 334         };
 335         struct sin6_list *sin6_iter;
 336         struct sin6_list *sin6_temp;
 337         struct ib_gid_attr gid_attr = {.ndev = ndev};
 338         LIST_HEAD(sin6_list);
 339
 340         if (ndev->reg_state >= NETREG_UNREGISTERING)
 341                 return;
 342
 343         in6_dev = in6_dev_get(ndev);
 344         if (!in6_dev)
 345                 return;
 346
 347         read_lock_bh(&in6_dev->lock);
 348         list_for_each_entry(ifp, &in6_dev->addr_list, if_list) {
 349                 struct sin6_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 350
 351                 if (!entry) {
 352                         pr_warn("roce_gid_mgmt: couldn't allocate entry for IPv6 update\n");
 353                         continue;
 354                 }
 355
 356                 entry->sin6.sin6_family = AF_INET6;
 357                 entry->sin6.sin6_addr = ifp->addr;
 358                 list_add_tail(&entry->list, &sin6_list);
 359         }
 360         read_unlock_bh(&in6_dev->lock);
 361
 362         in6_dev_put(in6_dev);
 363
 364         list_for_each_entry_safe(sin6_iter, sin6_temp, &sin6_list, list) {
 365                 union ib_gid    gid;
 366
 367                 rdma_ip2gid((struct sockaddr *)&sin6_iter->sin6, &gid);
 368                 update_gid(GID_ADD, ib_dev, port, &gid, &gid_attr);
 369                 list_del(&sin6_iter->list);
 370                 kfree(sin6_iter);
 371         }
 372 }
 373
 374 static void _add_netdev_ips(struct ib_device *ib_dev, u8 port,
 375                             struct net_device *ndev)
 376 {
 377         enum_netdev_ipv4_ips(ib_dev, port, ndev);
 378         if (IS_ENABLED(CONFIG_IPV6))
 379                 enum_netdev_ipv6_ips(ib_dev, port, ndev);
 380 }
 381
 382 static void add_netdev_ips(struct ib_device *ib_dev, u8 port,
 383                            struct net_device *rdma_ndev, void *cookie)
 384 {
 385         struct net_device *event_ndev = (struct net_device *)cookie;
 386
 387         enum_netdev_default_gids(ib_dev, port, event_ndev, rdma_ndev);
 388         _add_netdev_ips(ib_dev, port, event_ndev);
 389 }
 390
 391 static void del_netdev_ips(struct ib_device *ib_dev, u8 port,
 392                            struct net_device *rdma_ndev, void *cookie)
 393 {
 394         struct net_device *event_ndev = (struct net_device *)cookie;
 395
 396         ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev);
 397 }
 398
 399 static void enum_all_gids_of_dev_cb(struct ib_device *ib_dev,
 400                                     u8 port,
 401                                     struct net_device *rdma_ndev,
 402                                     void *cookie)
 403 {
 404         struct net *net;
 405         struct net_device *ndev;
 406
 407         /* Lock the rtnl to make sure the netdevs does not move under
 408          * our feet
 409          */
 410         rtnl_lock();
 411         for_each_net(net)
 412                 for_each_netdev(net, ndev)
 413                         if (is_eth_port_of_netdev(ib_dev, port, rdma_ndev, ndev))
 414                                 add_netdev_ips(ib_dev, port, rdma_ndev, ndev);
 415         rtnl_unlock();
 416 }
 417
 418 /* This function will rescan all of the network devices in the system
 419  * and add their gids, as needed, to the relevant RoCE devices. */
 420 int roce_rescan_device(struct ib_device *ib_dev)
 421 {
 422         ib_enum_roce_netdev(ib_dev, pass_all_filter, NULL,
 423                             enum_all_gids_of_dev_cb, NULL);
 424
 425         return 0;
 426 }
 427
 428 static void callback_for_addr_gid_device_scan(struct ib_device *device,
 429                                               u8 port,
 430                                               struct net_device *rdma_ndev,
 431                                               void *cookie)
 432 {
 433         struct update_gid_event_work *parsed = cookie;
 434
 435         return update_gid(parsed->gid_op, device,
 436                           port, &parsed->gid,
 437                           &parsed->gid_attr);
 438 }
 439
 440 static void handle_netdev_upper(struct ib_device *ib_dev, u8 port,
 441                                 void *cookie,
 442                                 void (*handle_netdev)(struct ib_device *ib_dev,
 443                                                       u8 port,
 444                                                       struct net_device *ndev))
 445 {
 446         struct net_device *ndev = (struct net_device *)cookie;
 447         struct upper_list {
 448                 struct list_head list;
 449                 struct net_device *upper;
 450         };
 451         struct net_device *upper;
 452         struct list_head *iter;
 453         struct upper_list *upper_iter;
 454         struct upper_list *upper_temp;
 455         LIST_HEAD(upper_list);
 456
 457         rcu_read_lock();
 458         netdev_for_each_all_upper_dev_rcu(ndev, upper, iter) {
 459                 struct upper_list *entry = kmalloc(sizeof(*entry),
 460                                                    GFP_ATOMIC);
 461
 462                 if (!entry) {
 463                         pr_info("roce_gid_mgmt: couldn't allocate entry to delete ndev\n");
 464                         continue;
 465                 }
 466
 467                 list_add_tail(&entry->list, &upper_list);
 468                 dev_hold(upper);
 469                 entry->upper = upper;
 470         }
 471         rcu_read_unlock();
 472
 473         handle_netdev(ib_dev, port, ndev);
 474         list_for_each_entry_safe(upper_iter, upper_temp, &upper_list,
 475                                  list) {
 476                 handle_netdev(ib_dev, port, upper_iter->upper);
 477                 dev_put(upper_iter->upper);
 478                 list_del(&upper_iter->list);
 479                 kfree(upper_iter);
 480         }
 481 }
 482
 483 static void _roce_del_all_netdev_gids(struct ib_device *ib_dev, u8 port,
 484                                       struct net_device *event_ndev)
 485 {
 486         ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev);
 487 }
 488
 489 static void del_netdev_upper_ips(struct ib_device *ib_dev, u8 port,
 490                                  struct net_device *rdma_ndev, void *cookie)
 491 {
 492         handle_netdev_upper(ib_dev, port, cookie, _roce_del_all_netdev_gids);
 493 }
 494
 495 static void add_netdev_upper_ips(struct ib_device *ib_dev, u8 port,
 496                                  struct net_device *rdma_ndev, void *cookie)
 497 {
 498         handle_netdev_upper(ib_dev, port, cookie, _add_netdev_ips);
 499 }
 500
 501 static void del_netdev_default_ips_join(struct ib_device *ib_dev, u8 port,
 502                                         struct net_device *rdma_ndev,
 503                                         void *cookie)
 504 {
 505         struct net_device *master_ndev;
 506
 507         rcu_read_lock();
 508         master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev);
 509         if (master_ndev)
 510                 dev_hold(master_ndev);
 511         rcu_read_unlock();
 512
 513         if (master_ndev) {
 514                 bond_delete_netdev_default_gids(ib_dev, port, master_ndev,
 515                                                 rdma_ndev);
 516                 dev_put(master_ndev);
 517         }
 518 }
 519
 520 static void del_netdev_default_ips(struct ib_device *ib_dev, u8 port,
 521                                    struct net_device *rdma_ndev, void *cookie)
 522 {
 523         struct net_device *event_ndev = (struct net_device *)cookie;
 524
 525         bond_delete_netdev_default_gids(ib_dev, port, event_ndev, rdma_ndev);
 526 }
 527
 528 /* The following functions operate on all IB devices. netdevice_event and
 529  * addr_event execute ib_enum_all_roce_netdevs through a work.
 530  * ib_enum_all_roce_netdevs iterates through all IB devices.
 531  */
 532
 533 static void netdevice_event_work_handler(struct work_struct *_work)
 534 {
 535         struct netdev_event_work *work =
 536                 container_of(_work, struct netdev_event_work, work);
 537         unsigned int i;
 538
 539         for (i = 0; i < ARRAY_SIZE(work->cmds) && work->cmds[i].cb; i++) {
 540                 ib_enum_all_roce_netdevs(work->cmds[i].filter,
 541                                          work->cmds[i].filter_ndev,
 542                                          work->cmds[i].cb,
 543                                          work->cmds[i].ndev);
 544                 dev_put(work->cmds[i].ndev);
 545                 dev_put(work->cmds[i].filter_ndev);
 546         }
 547
 548         kfree(work);
 549 }
 550
 551 static int netdevice_queue_work(struct netdev_event_work_cmd *cmds,
 552                                 struct net_device *ndev)
 553 {
 554         unsigned int i;
 555         struct netdev_event_work *ndev_work =
 556                 kmalloc(sizeof(*ndev_work), GFP_KERNEL);
 557
 558         if (!ndev_work) {
 559                 pr_warn("roce_gid_mgmt: can't allocate work for netdevice_event\n");
 560                 return NOTIFY_DONE;
 561         }
 562
 563         memcpy(ndev_work->cmds, cmds, sizeof(ndev_work->cmds));
 564         for (i = 0; i < ARRAY_SIZE(ndev_work->cmds) && ndev_work->cmds[i].cb; i++) {
 565                 if (!ndev_work->cmds[i].ndev)
 566                         ndev_work->cmds[i].ndev = ndev;
 567                 if (!ndev_work->cmds[i].filter_ndev)
 568                         ndev_work->cmds[i].filter_ndev = ndev;
 569                 dev_hold(ndev_work->cmds[i].ndev);
 570                 dev_hold(ndev_work->cmds[i].filter_ndev);
 571         }
 572         INIT_WORK(&ndev_work->work, netdevice_event_work_handler);
 573
 574         queue_work(ib_wq, &ndev_work->work);
 575
 576         return NOTIFY_DONE;
 577 }
 578
 579 static const struct netdev_event_work_cmd add_cmd = {
 580         .cb = add_netdev_ips, .filter = is_eth_port_of_netdev};
 581 static const struct netdev_event_work_cmd add_cmd_upper_ips = {
 582         .cb = add_netdev_upper_ips, .filter = is_eth_port_of_netdev};
 583
 584 static void netdevice_event_changeupper(struct netdev_notifier_changeupper_info *changeupper_info,
 585                                         struct netdev_event_work_cmd *cmds)
 586 {
 587         static const struct netdev_event_work_cmd upper_ips_del_cmd = {
 588                 .cb = del_netdev_upper_ips, .filter = upper_device_filter};
 589         static const struct netdev_event_work_cmd bonding_default_del_cmd = {
 590                 .cb = del_netdev_default_ips, .filter = is_eth_port_inactive_slave};
 591
 592         if (changeupper_info->linking == false) {
 593                 cmds[0] = upper_ips_del_cmd;
 594                 cmds[0].ndev = changeupper_info->upper_dev;
 595                 cmds[1] = add_cmd;
 596         } else {
 597                 cmds[0] = bonding_default_del_cmd;
 598                 cmds[0].ndev = changeupper_info->upper_dev;
 599                 cmds[1] = add_cmd_upper_ips;
 600                 cmds[1].ndev = changeupper_info->upper_dev;
 601                 cmds[1].filter_ndev = changeupper_info->upper_dev;
 602         }
 603 }
 604
 605 static int netdevice_event(struct notifier_block *this, unsigned long event,
 606                            void *ptr)
 607 {
 608         static const struct netdev_event_work_cmd del_cmd = {
 609                 .cb = del_netdev_ips, .filter = pass_all_filter};
 610         static const struct netdev_event_work_cmd bonding_default_del_cmd_join = {
 611                 .cb = del_netdev_default_ips_join, .filter = is_eth_port_inactive_slave};
 612         static const struct netdev_event_work_cmd default_del_cmd = {
 613                 .cb = del_netdev_default_ips, .filter = pass_all_filter};
 614         static const struct netdev_event_work_cmd bonding_event_ips_del_cmd = {
 615                 .cb = del_netdev_upper_ips, .filter = upper_device_filter};
 616         struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
 617         struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ] = { {NULL} };
 618
 619         if (ndev->type != ARPHRD_ETHER)
 620                 return NOTIFY_DONE;
 621
 622         switch (event) {
 623         case NETDEV_REGISTER:
 624         case NETDEV_UP:
 625                 cmds[0] = bonding_default_del_cmd_join;
 626                 cmds[1] = add_cmd;
 627                 break;
 628
 629         case NETDEV_UNREGISTER:
 630                 if (ndev->reg_state < NETREG_UNREGISTERED)
 631                         cmds[0] = del_cmd;
 632                 else
 633                         return NOTIFY_DONE;
 634                 break;
 635
 636         case NETDEV_CHANGEADDR:
 637                 cmds[0] = default_del_cmd;
 638                 cmds[1] = add_cmd;
 639                 break;
 640
 641         case NETDEV_CHANGEUPPER:
 642                 netdevice_event_changeupper(
 643                         container_of(ptr, struct netdev_notifier_changeupper_info, info),
 644                         cmds);
 645                 break;
 646
 647         case NETDEV_BONDING_FAILOVER:
 648                 cmds[0] = bonding_event_ips_del_cmd;
 649                 cmds[1] = bonding_default_del_cmd_join;
 650                 cmds[2] = add_cmd_upper_ips;
 651                 break;
 652
 653         default:
 654                 return NOTIFY_DONE;
 655         }
 656
 657         return netdevice_queue_work(cmds, ndev);
 658 }
 659
 660 static void update_gid_event_work_handler(struct work_struct *_work)
 661 {
 662         struct update_gid_event_work *work =
 663                 container_of(_work, struct update_gid_event_work, work);
 664
 665         ib_enum_all_roce_netdevs(is_eth_port_of_netdev, work->gid_attr.ndev,
 666                                  callback_for_addr_gid_device_scan, work);
 667
 668         dev_put(work->gid_attr.ndev);
 669         kfree(work);
 670 }
 671
 672 static int addr_event(struct notifier_block *this, unsigned long event,
 673                       struct sockaddr *sa, struct net_device *ndev)
 674 {
 675         struct update_gid_event_work *work;
 676         enum gid_op_type gid_op;
 677
 678         if (ndev->type != ARPHRD_ETHER)
 679                 return NOTIFY_DONE;
 680
 681         switch (event) {
 682         case NETDEV_UP:
 683                 gid_op = GID_ADD;
 684                 break;
 685
 686         case NETDEV_DOWN:
 687                 gid_op = GID_DEL;
 688                 break;
 689
 690         default:
 691                 return NOTIFY_DONE;
 692         }
 693
 694         work = kmalloc(sizeof(*work), GFP_ATOMIC);
 695         if (!work) {
 696                 pr_warn("roce_gid_mgmt: Couldn't allocate work for addr_event\n");
 697                 return NOTIFY_DONE;
 698         }
 699
 700         INIT_WORK(&work->work, update_gid_event_work_handler);
 701
 702         rdma_ip2gid(sa, &work->gid);
 703         work->gid_op = gid_op;
 704
 705         memset(&work->gid_attr, 0, sizeof(work->gid_attr));
 706         dev_hold(ndev);
 707         work->gid_attr.ndev   = ndev;
 708
 709         queue_work(ib_wq, &work->work);
 710
 711         return NOTIFY_DONE;
 712 }
 713
 714 static int inetaddr_event(struct notifier_block *this, unsigned long event,
 715                           void *ptr)
 716 {
 717         struct sockaddr_in      in;
 718         struct net_device       *ndev;
 719         struct in_ifaddr        *ifa = ptr;
 720
 721         in.sin_family = AF_INET;
 722         in.sin_addr.s_addr = ifa->ifa_address;
 723         ndev = ifa->ifa_dev->dev;
 724
 725         return addr_event(this, event, (struct sockaddr *)&in, ndev);
 726 }
 727
 728 static int inet6addr_event(struct notifier_block *this, unsigned long event,
 729                            void *ptr)
 730 {
 731         struct sockaddr_in6     in6;
 732         struct net_device       *ndev;
 733         struct inet6_ifaddr     *ifa6 = ptr;
 734
 735         in6.sin6_family = AF_INET6;
 736         in6.sin6_addr = ifa6->addr;
 737         ndev = ifa6->idev->dev;
 738
 739         return addr_event(this, event, (struct sockaddr *)&in6, ndev);
 740 }
 741
 742 static struct notifier_block nb_netdevice = {
 743         .notifier_call = netdevice_event
 744 };
 745
 746 static struct notifier_block nb_inetaddr = {
 747         .notifier_call = inetaddr_event
 748 };
 749
 750 static struct notifier_block nb_inet6addr = {
 751         .notifier_call = inet6addr_event
 752 };
 753
 754 int __init roce_gid_mgmt_init(void)
 755 {
 756         register_inetaddr_notifier(&nb_inetaddr);
 757         if (IS_ENABLED(CONFIG_IPV6))
 758                 register_inet6addr_notifier(&nb_inet6addr);
 759         /* We relay on the netdevice notifier to enumerate all
 760          * existing devices in the system. Register to this notifier
 761          * last to make sure we will not miss any IP add/del
 762          * callbacks.
 763          */
 764         register_netdevice_notifier(&nb_netdevice);
 765
 766         return 0;
 767 }
 768
 769 void __exit roce_gid_mgmt_cleanup(void)
 770 {
 771         if (IS_ENABLED(CONFIG_IPV6))
 772                 unregister_inet6addr_notifier(&nb_inet6addr);
 773         unregister_inetaddr_notifier(&nb_inetaddr);
 774         unregister_netdevice_notifier(&nb_netdevice);
 775         /* Ensure all gid deletion tasks complete before we go down,
 776          * to avoid any reference to free'd memory. By the time
 777          * ib-core is removed, all physical devices have been removed,
 778          * so no issue with remaining hardware contexts.
 779          */
 780 }