net/core/devlink.c

   1 /*
   2  * net/core/devlink.c - Network physical/parent device Netlink interface
   3  *
   4  * Heavily inspired by net/wireless/
   5  * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
   6  * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/module.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/gfp.h>
  19 #include <linux/device.h>
  20 #include <linux/list.h>
  21 #include <linux/netdevice.h>
  22 #include <rdma/ib_verbs.h>
  23 #include <net/netlink.h>
  24 #include <net/genetlink.h>
  25 #include <net/rtnetlink.h>
  26 #include <net/net_namespace.h>
  27 #include <net/sock.h>
  28 #include <net/devlink.h>
  29 #define CREATE_TRACE_POINTS
  30 #include <trace/events/devlink.h>
  31
  32 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
  33
  34 static LIST_HEAD(devlink_list);
  35
  36 /* devlink_mutex
  37  *
  38  * An overall lock guarding every operation coming from userspace.
  39  * It also guards devlink devices list and it is taken when
  40  * driver registers/unregisters it.
  41  */
  42 static DEFINE_MUTEX(devlink_mutex);
  43
  44 /* devlink_port_mutex
  45  *
  46  * Shared lock to guard lists of ports in all devlink devices.
  47  */
  48 static DEFINE_MUTEX(devlink_port_mutex);
  49
  50 static struct net *devlink_net(const struct devlink *devlink)
  51 {
  52         return read_pnet(&devlink->_net);
  53 }
  54
  55 static void devlink_net_set(struct devlink *devlink, struct net *net)
  56 {
  57         write_pnet(&devlink->_net, net);
  58 }
  59
  60 static struct devlink *devlink_get_from_attrs(struct net *net,
  61                                               struct nlattr **attrs)
  62 {
  63         struct devlink *devlink;
  64         char *busname;
  65         char *devname;
  66
  67         if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])
  68                 return ERR_PTR(-EINVAL);
  69
  70         busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
  71         devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
  72
  73         list_for_each_entry(devlink, &devlink_list, list) {
  74                 if (strcmp(devlink->dev->bus->name, busname) == 0 &&
  75                     strcmp(dev_name(devlink->dev), devname) == 0 &&
  76                     net_eq(devlink_net(devlink), net))
  77                         return devlink;
  78         }
  79
  80         return ERR_PTR(-ENODEV);
  81 }
  82
  83 static struct devlink *devlink_get_from_info(struct genl_info *info)
  84 {
  85         return devlink_get_from_attrs(genl_info_net(info), info->attrs);
  86 }
  87
  88 static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
  89                                                       int port_index)
  90 {
  91         struct devlink_port *devlink_port;
  92
  93         list_for_each_entry(devlink_port, &devlink->port_list, list) {
  94                 if (devlink_port->index == port_index)
  95                         return devlink_port;
  96         }
  97         return NULL;
  98 }
  99
 100 static bool devlink_port_index_exists(struct devlink *devlink, int port_index)
 101 {
 102         return devlink_port_get_by_index(devlink, port_index);
 103 }
 104
 105 static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
 106                                                         struct nlattr **attrs)
 107 {
 108         if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
 109                 u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
 110                 struct devlink_port *devlink_port;
 111
 112                 devlink_port = devlink_port_get_by_index(devlink, port_index);
 113                 if (!devlink_port)
 114                         return ERR_PTR(-ENODEV);
 115                 return devlink_port;
 116         }
 117         return ERR_PTR(-EINVAL);
 118 }
 119
 120 static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
 121                                                        struct genl_info *info)
 122 {
 123         return devlink_port_get_from_attrs(devlink, info->attrs);
 124 }
 125
 126 struct devlink_sb {
 127         struct list_head list;
 128         unsigned int index;
 129         u32 size;
 130         u16 ingress_pools_count;
 131         u16 egress_pools_count;
 132         u16 ingress_tc_count;
 133         u16 egress_tc_count;
 134 };
 135
 136 static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb)
 137 {
 138         return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count;
 139 }
 140
 141 static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink,
 142                                                   unsigned int sb_index)
 143 {
 144         struct devlink_sb *devlink_sb;
 145
 146         list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
 147                 if (devlink_sb->index == sb_index)
 148                         return devlink_sb;
 149         }
 150         return NULL;
 151 }
 152
 153 static bool devlink_sb_index_exists(struct devlink *devlink,
 154                                     unsigned int sb_index)
 155 {
 156         return devlink_sb_get_by_index(devlink, sb_index);
 157 }
 158
 159 static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink,
 160                                                     struct nlattr **attrs)
 161 {
 162         if (attrs[DEVLINK_ATTR_SB_INDEX]) {
 163                 u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]);
 164                 struct devlink_sb *devlink_sb;
 165
 166                 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
 167                 if (!devlink_sb)
 168                         return ERR_PTR(-ENODEV);
 169                 return devlink_sb;
 170         }
 171         return ERR_PTR(-EINVAL);
 172 }
 173
 174 static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink,
 175                                                    struct genl_info *info)
 176 {
 177         return devlink_sb_get_from_attrs(devlink, info->attrs);
 178 }
 179
 180 static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb,
 181                                                 struct nlattr **attrs,
 182                                                 u16 *p_pool_index)
 183 {
 184         u16 val;
 185
 186         if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX])
 187                 return -EINVAL;
 188
 189         val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]);
 190         if (val >= devlink_sb_pool_count(devlink_sb))
 191                 return -EINVAL;
 192         *p_pool_index = val;
 193         return 0;
 194 }
 195
 196 static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb,
 197                                                struct genl_info *info,
 198                                                u16 *p_pool_index)
 199 {
 200         return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs,
 201                                                     p_pool_index);
 202 }
 203
 204 static int
 205 devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs,
 206                                     enum devlink_sb_pool_type *p_pool_type)
 207 {
 208         u8 val;
 209
 210         if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE])
 211                 return -EINVAL;
 212
 213         val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]);
 214         if (val != DEVLINK_SB_POOL_TYPE_INGRESS &&
 215             val != DEVLINK_SB_POOL_TYPE_EGRESS)
 216                 return -EINVAL;
 217         *p_pool_type = val;
 218         return 0;
 219 }
 220
 221 static int
 222 devlink_sb_pool_type_get_from_info(struct genl_info *info,
 223                                    enum devlink_sb_pool_type *p_pool_type)
 224 {
 225         return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type);
 226 }
 227
 228 static int
 229 devlink_sb_th_type_get_from_attrs(struct nlattr **attrs,
 230                                   enum devlink_sb_threshold_type *p_th_type)
 231 {
 232         u8 val;
 233
 234         if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])
 235                 return -EINVAL;
 236
 237         val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]);
 238         if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC &&
 239             val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC)
 240                 return -EINVAL;
 241         *p_th_type = val;
 242         return 0;
 243 }
 244
 245 static int
 246 devlink_sb_th_type_get_from_info(struct genl_info *info,
 247                                  enum devlink_sb_threshold_type *p_th_type)
 248 {
 249         return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type);
 250 }
 251
 252 static int
 253 devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb,
 254                                    struct nlattr **attrs,
 255                                    enum devlink_sb_pool_type pool_type,
 256                                    u16 *p_tc_index)
 257 {
 258         u16 val;
 259
 260         if (!attrs[DEVLINK_ATTR_SB_TC_INDEX])
 261                 return -EINVAL;
 262
 263         val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]);
 264         if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS &&
 265             val >= devlink_sb->ingress_tc_count)
 266                 return -EINVAL;
 267         if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS &&
 268             val >= devlink_sb->egress_tc_count)
 269                 return -EINVAL;
 270         *p_tc_index = val;
 271         return 0;
 272 }
 273
 274 static int
 275 devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
 276                                   struct genl_info *info,
 277                                   enum devlink_sb_pool_type pool_type,
 278                                   u16 *p_tc_index)
 279 {
 280         return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs,
 281                                                   pool_type, p_tc_index);
 282 }
 283
 284 #define DEVLINK_NL_FLAG_NEED_DEVLINK    BIT(0)
 285 #define DEVLINK_NL_FLAG_NEED_PORT       BIT(1)
 286 #define DEVLINK_NL_FLAG_NEED_SB         BIT(2)
 287 #define DEVLINK_NL_FLAG_LOCK_PORTS      BIT(3)
 288         /* port is not needed but we need to ensure they don't
 289          * change in the middle of command
 290          */
 291
 292 static int devlink_nl_pre_doit(const struct genl_ops *ops,
 293                                struct sk_buff *skb, struct genl_info *info)
 294 {
 295         struct devlink *devlink;
 296
 297         mutex_lock(&devlink_mutex);
 298         devlink = devlink_get_from_info(info);
 299         if (IS_ERR(devlink)) {
 300                 mutex_unlock(&devlink_mutex);
 301                 return PTR_ERR(devlink);
 302         }
 303         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
 304                 info->user_ptr[0] = devlink;
 305         } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
 306                 struct devlink_port *devlink_port;
 307
 308                 mutex_lock(&devlink_port_mutex);
 309                 devlink_port = devlink_port_get_from_info(devlink, info);
 310                 if (IS_ERR(devlink_port)) {
 311                         mutex_unlock(&devlink_port_mutex);
 312                         mutex_unlock(&devlink_mutex);
 313                         return PTR_ERR(devlink_port);
 314                 }
 315                 info->user_ptr[0] = devlink_port;
 316         }
 317         if (ops->internal_flags & DEVLINK_NL_FLAG_LOCK_PORTS) {
 318                 mutex_lock(&devlink_port_mutex);
 319         }
 320         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_SB) {
 321                 struct devlink_sb *devlink_sb;
 322
 323                 devlink_sb = devlink_sb_get_from_info(devlink, info);
 324                 if (IS_ERR(devlink_sb)) {
 325                         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT)
 326                                 mutex_unlock(&devlink_port_mutex);
 327                         mutex_unlock(&devlink_mutex);
 328                         return PTR_ERR(devlink_sb);
 329                 }
 330                 info->user_ptr[1] = devlink_sb;
 331         }
 332         return 0;
 333 }
 334
 335 static void devlink_nl_post_doit(const struct genl_ops *ops,
 336                                  struct sk_buff *skb, struct genl_info *info)
 337 {
 338         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT ||
 339             ops->internal_flags & DEVLINK_NL_FLAG_LOCK_PORTS)
 340                 mutex_unlock(&devlink_port_mutex);
 341         mutex_unlock(&devlink_mutex);
 342 }
 343
 344 static struct genl_family devlink_nl_family;
 345
 346 enum devlink_multicast_groups {
 347         DEVLINK_MCGRP_CONFIG,
 348 };
 349
 350 static const struct genl_multicast_group devlink_nl_mcgrps[] = {
 351         [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },
 352 };
 353
 354 static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
 355 {
 356         if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
 357                 return -EMSGSIZE;
 358         if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
 359                 return -EMSGSIZE;
 360         return 0;
 361 }
 362
 363 static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
 364                            enum devlink_command cmd, u32 portid,
 365                            u32 seq, int flags)
 366 {
 367         void *hdr;
 368
 369         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 370         if (!hdr)
 371                 return -EMSGSIZE;
 372
 373         if (devlink_nl_put_handle(msg, devlink))
 374                 goto nla_put_failure;
 375
 376         genlmsg_end(msg, hdr);
 377         return 0;
 378
 379 nla_put_failure:
 380         genlmsg_cancel(msg, hdr);
 381         return -EMSGSIZE;
 382 }
 383
 384 static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
 385 {
 386         struct sk_buff *msg;
 387         int err;
 388
 389         WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
 390
 391         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 392         if (!msg)
 393                 return;
 394
 395         err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
 396         if (err) {
 397                 nlmsg_free(msg);
 398                 return;
 399         }
 400
 401         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
 402                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
 403 }
 404
 405 static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
 406                                 struct devlink_port *devlink_port,
 407                                 enum devlink_command cmd, u32 portid,
 408                                 u32 seq, int flags)
 409 {
 410         void *hdr;
 411
 412         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 413         if (!hdr)
 414                 return -EMSGSIZE;
 415
 416         if (devlink_nl_put_handle(msg, devlink))
 417                 goto nla_put_failure;
 418         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
 419                 goto nla_put_failure;
 420         if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
 421                 goto nla_put_failure;
 422         if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
 423             nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
 424                         devlink_port->desired_type))
 425                 goto nla_put_failure;
 426         if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
 427                 struct net_device *netdev = devlink_port->type_dev;
 428
 429                 if (netdev &&
 430                     (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
 431                                  netdev->ifindex) ||
 432                      nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
 433                                     netdev->name)))
 434                         goto nla_put_failure;
 435         }
 436         if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
 437                 struct ib_device *ibdev = devlink_port->type_dev;
 438
 439                 if (ibdev &&
 440                     nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
 441                                    ibdev->name))
 442                         goto nla_put_failure;
 443         }
 444         if (devlink_port->split &&
 445             nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
 446                         devlink_port->split_group))
 447                 goto nla_put_failure;
 448
 449         genlmsg_end(msg, hdr);
 450         return 0;
 451
 452 nla_put_failure:
 453         genlmsg_cancel(msg, hdr);
 454         return -EMSGSIZE;
 455 }
 456
 457 static void devlink_port_notify(struct devlink_port *devlink_port,
 458                                 enum devlink_command cmd)
 459 {
 460         struct devlink *devlink = devlink_port->devlink;
 461         struct sk_buff *msg;
 462         int err;
 463
 464         if (!devlink_port->registered)
 465                 return;
 466
 467         WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
 468
 469         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 470         if (!msg)
 471                 return;
 472
 473         err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0);
 474         if (err) {
 475                 nlmsg_free(msg);
 476                 return;
 477         }
 478
 479         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
 480                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
 481 }
 482
 483 static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info)
 484 {
 485         struct devlink *devlink = info->user_ptr[0];
 486         struct sk_buff *msg;
 487         int err;
 488
 489         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 490         if (!msg)
 491                 return -ENOMEM;
 492
 493         err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
 494                               info->snd_portid, info->snd_seq, 0);
 495         if (err) {
 496                 nlmsg_free(msg);
 497                 return err;
 498         }
 499
 500         return genlmsg_reply(msg, info);
 501 }
 502
 503 static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg,
 504                                      struct netlink_callback *cb)
 505 {
 506         struct devlink *devlink;
 507         int start = cb->args[0];
 508         int idx = 0;
 509         int err;
 510
 511         mutex_lock(&devlink_mutex);
 512         list_for_each_entry(devlink, &devlink_list, list) {
 513                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 514                         continue;
 515                 if (idx < start) {
 516                         idx++;
 517                         continue;
 518                 }
 519                 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
 520                                       NETLINK_CB(cb->skb).portid,
 521                                       cb->nlh->nlmsg_seq, NLM_F_MULTI);
 522                 if (err)
 523                         goto out;
 524                 idx++;
 525         }
 526 out:
 527         mutex_unlock(&devlink_mutex);
 528
 529         cb->args[0] = idx;
 530         return msg->len;
 531 }
 532
 533 static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
 534                                         struct genl_info *info)
 535 {
 536         struct devlink_port *devlink_port = info->user_ptr[0];
 537         struct devlink *devlink = devlink_port->devlink;
 538         struct sk_buff *msg;
 539         int err;
 540
 541         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 542         if (!msg)
 543                 return -ENOMEM;
 544
 545         err = devlink_nl_port_fill(msg, devlink, devlink_port,
 546                                    DEVLINK_CMD_PORT_NEW,
 547                                    info->snd_portid, info->snd_seq, 0);
 548         if (err) {
 549                 nlmsg_free(msg);
 550                 return err;
 551         }
 552
 553         return genlmsg_reply(msg, info);
 554 }
 555
 556 static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
 557                                           struct netlink_callback *cb)
 558 {
 559         struct devlink *devlink;
 560         struct devlink_port *devlink_port;
 561         int start = cb->args[0];
 562         int idx = 0;
 563         int err;
 564
 565         mutex_lock(&devlink_mutex);
 566         mutex_lock(&devlink_port_mutex);
 567         list_for_each_entry(devlink, &devlink_list, list) {
 568                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 569                         continue;
 570                 list_for_each_entry(devlink_port, &devlink->port_list, list) {
 571                         if (idx < start) {
 572                                 idx++;
 573                                 continue;
 574                         }
 575                         err = devlink_nl_port_fill(msg, devlink, devlink_port,
 576                                                    DEVLINK_CMD_NEW,
 577                                                    NETLINK_CB(cb->skb).portid,
 578                                                    cb->nlh->nlmsg_seq,
 579                                                    NLM_F_MULTI);
 580                         if (err)
 581                                 goto out;
 582                         idx++;
 583                 }
 584         }
 585 out:
 586         mutex_unlock(&devlink_port_mutex);
 587         mutex_unlock(&devlink_mutex);
 588
 589         cb->args[0] = idx;
 590         return msg->len;
 591 }
 592
 593 static int devlink_port_type_set(struct devlink *devlink,
 594                                  struct devlink_port *devlink_port,
 595                                  enum devlink_port_type port_type)
 596
 597 {
 598         int err;
 599
 600         if (devlink->ops && devlink->ops->port_type_set) {
 601                 if (port_type == DEVLINK_PORT_TYPE_NOTSET)
 602                         return -EINVAL;
 603                 if (port_type == devlink_port->type)
 604                         return 0;
 605                 err = devlink->ops->port_type_set(devlink_port, port_type);
 606                 if (err)
 607                         return err;
 608                 devlink_port->desired_type = port_type;
 609                 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
 610                 return 0;
 611         }
 612         return -EOPNOTSUPP;
 613 }
 614
 615 static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
 616                                         struct genl_info *info)
 617 {
 618         struct devlink_port *devlink_port = info->user_ptr[0];
 619         struct devlink *devlink = devlink_port->devlink;
 620         int err;
 621
 622         if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
 623                 enum devlink_port_type port_type;
 624
 625                 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
 626                 err = devlink_port_type_set(devlink, devlink_port, port_type);
 627                 if (err)
 628                         return err;
 629         }
 630         return 0;
 631 }
 632
 633 static int devlink_port_split(struct devlink *devlink,
 634                               u32 port_index, u32 count)
 635
 636 {
 637         if (devlink->ops && devlink->ops->port_split)
 638                 return devlink->ops->port_split(devlink, port_index, count);
 639         return -EOPNOTSUPP;
 640 }
 641
 642 static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
 643                                           struct genl_info *info)
 644 {
 645         struct devlink *devlink = info->user_ptr[0];
 646         u32 port_index;
 647         u32 count;
 648
 649         if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
 650             !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
 651                 return -EINVAL;
 652
 653         port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
 654         count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
 655         return devlink_port_split(devlink, port_index, count);
 656 }
 657
 658 static int devlink_port_unsplit(struct devlink *devlink, u32 port_index)
 659
 660 {
 661         if (devlink->ops && devlink->ops->port_unsplit)
 662                 return devlink->ops->port_unsplit(devlink, port_index);
 663         return -EOPNOTSUPP;
 664 }
 665
 666 static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
 667                                             struct genl_info *info)
 668 {
 669         struct devlink *devlink = info->user_ptr[0];
 670         u32 port_index;
 671
 672         if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
 673                 return -EINVAL;
 674
 675         port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
 676         return devlink_port_unsplit(devlink, port_index);
 677 }
 678
 679 static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
 680                               struct devlink_sb *devlink_sb,
 681                               enum devlink_command cmd, u32 portid,
 682                               u32 seq, int flags)
 683 {
 684         void *hdr;
 685
 686         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 687         if (!hdr)
 688                 return -EMSGSIZE;
 689
 690         if (devlink_nl_put_handle(msg, devlink))
 691                 goto nla_put_failure;
 692         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
 693                 goto nla_put_failure;
 694         if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size))
 695                 goto nla_put_failure;
 696         if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT,
 697                         devlink_sb->ingress_pools_count))
 698                 goto nla_put_failure;
 699         if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT,
 700                         devlink_sb->egress_pools_count))
 701                 goto nla_put_failure;
 702         if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT,
 703                         devlink_sb->ingress_tc_count))
 704                 goto nla_put_failure;
 705         if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT,
 706                         devlink_sb->egress_tc_count))
 707                 goto nla_put_failure;
 708
 709         genlmsg_end(msg, hdr);
 710         return 0;
 711
 712 nla_put_failure:
 713         genlmsg_cancel(msg, hdr);
 714         return -EMSGSIZE;
 715 }
 716
 717 static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb,
 718                                       struct genl_info *info)
 719 {
 720         struct devlink *devlink = info->user_ptr[0];
 721         struct devlink_sb *devlink_sb = info->user_ptr[1];
 722         struct sk_buff *msg;
 723         int err;
 724
 725         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 726         if (!msg)
 727                 return -ENOMEM;
 728
 729         err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
 730                                  DEVLINK_CMD_SB_NEW,
 731                                  info->snd_portid, info->snd_seq, 0);
 732         if (err) {
 733                 nlmsg_free(msg);
 734                 return err;
 735         }
 736
 737         return genlmsg_reply(msg, info);
 738 }
 739
 740 static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
 741                                         struct netlink_callback *cb)
 742 {
 743         struct devlink *devlink;
 744         struct devlink_sb *devlink_sb;
 745         int start = cb->args[0];
 746         int idx = 0;
 747         int err;
 748
 749         mutex_lock(&devlink_mutex);
 750         list_for_each_entry(devlink, &devlink_list, list) {
 751                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 752                         continue;
 753                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
 754                         if (idx < start) {
 755                                 idx++;
 756                                 continue;
 757                         }
 758                         err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
 759                                                  DEVLINK_CMD_SB_NEW,
 760                                                  NETLINK_CB(cb->skb).portid,
 761                                                  cb->nlh->nlmsg_seq,
 762                                                  NLM_F_MULTI);
 763                         if (err)
 764                                 goto out;
 765                         idx++;
 766                 }
 767         }
 768 out:
 769         mutex_unlock(&devlink_mutex);
 770
 771         cb->args[0] = idx;
 772         return msg->len;
 773 }
 774
 775 static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink,
 776                                    struct devlink_sb *devlink_sb,
 777                                    u16 pool_index, enum devlink_command cmd,
 778                                    u32 portid, u32 seq, int flags)
 779 {
 780         struct devlink_sb_pool_info pool_info;
 781         void *hdr;
 782         int err;
 783
 784         err = devlink->ops->sb_pool_get(devlink, devlink_sb->index,
 785                                         pool_index, &pool_info);
 786         if (err)
 787                 return err;
 788
 789         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 790         if (!hdr)
 791                 return -EMSGSIZE;
 792
 793         if (devlink_nl_put_handle(msg, devlink))
 794                 goto nla_put_failure;
 795         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
 796                 goto nla_put_failure;
 797         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
 798                 goto nla_put_failure;
 799         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type))
 800                 goto nla_put_failure;
 801         if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size))
 802                 goto nla_put_failure;
 803         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
 804                        pool_info.threshold_type))
 805                 goto nla_put_failure;
 806
 807         genlmsg_end(msg, hdr);
 808         return 0;
 809
 810 nla_put_failure:
 811         genlmsg_cancel(msg, hdr);
 812         return -EMSGSIZE;
 813 }
 814
 815 static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb,
 816                                            struct genl_info *info)
 817 {
 818         struct devlink *devlink = info->user_ptr[0];
 819         struct devlink_sb *devlink_sb = info->user_ptr[1];
 820         struct sk_buff *msg;
 821         u16 pool_index;
 822         int err;
 823
 824         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
 825                                                   &pool_index);
 826         if (err)
 827                 return err;
 828
 829         if (!devlink->ops || !devlink->ops->sb_pool_get)
 830                 return -EOPNOTSUPP;
 831
 832         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 833         if (!msg)
 834                 return -ENOMEM;
 835
 836         err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index,
 837                                       DEVLINK_CMD_SB_POOL_NEW,
 838                                       info->snd_portid, info->snd_seq, 0);
 839         if (err) {
 840                 nlmsg_free(msg);
 841                 return err;
 842         }
 843
 844         return genlmsg_reply(msg, info);
 845 }
 846
 847 static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
 848                                 struct devlink *devlink,
 849                                 struct devlink_sb *devlink_sb,
 850                                 u32 portid, u32 seq)
 851 {
 852         u16 pool_count = devlink_sb_pool_count(devlink_sb);
 853         u16 pool_index;
 854         int err;
 855
 856         for (pool_index = 0; pool_index < pool_count; pool_index++) {
 857                 if (*p_idx < start) {
 858                         (*p_idx)++;
 859                         continue;
 860                 }
 861                 err = devlink_nl_sb_pool_fill(msg, devlink,
 862                                               devlink_sb,
 863                                               pool_index,
 864                                               DEVLINK_CMD_SB_POOL_NEW,
 865                                               portid, seq, NLM_F_MULTI);
 866                 if (err)
 867                         return err;
 868                 (*p_idx)++;
 869         }
 870         return 0;
 871 }
 872
 873 static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg,
 874                                              struct netlink_callback *cb)
 875 {
 876         struct devlink *devlink;
 877         struct devlink_sb *devlink_sb;
 878         int start = cb->args[0];
 879         int idx = 0;
 880         int err;
 881
 882         mutex_lock(&devlink_mutex);
 883         list_for_each_entry(devlink, &devlink_list, list) {
 884                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
 885                     !devlink->ops || !devlink->ops->sb_pool_get)
 886                         continue;
 887                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
 888                         err = __sb_pool_get_dumpit(msg, start, &idx, devlink,
 889                                                    devlink_sb,
 890                                                    NETLINK_CB(cb->skb).portid,
 891                                                    cb->nlh->nlmsg_seq);
 892                         if (err && err != -EOPNOTSUPP)
 893                                 goto out;
 894                 }
 895         }
 896 out:
 897         mutex_unlock(&devlink_mutex);
 898
 899         cb->args[0] = idx;
 900         return msg->len;
 901 }
 902
 903 static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
 904                                u16 pool_index, u32 size,
 905                                enum devlink_sb_threshold_type threshold_type)
 906
 907 {
 908         const struct devlink_ops *ops = devlink->ops;
 909
 910         if (ops && ops->sb_pool_set)
 911                 return ops->sb_pool_set(devlink, sb_index, pool_index,
 912                                         size, threshold_type);
 913         return -EOPNOTSUPP;
 914 }
 915
 916 static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb,
 917                                            struct genl_info *info)
 918 {
 919         struct devlink *devlink = info->user_ptr[0];
 920         struct devlink_sb *devlink_sb = info->user_ptr[1];
 921         enum devlink_sb_threshold_type threshold_type;
 922         u16 pool_index;
 923         u32 size;
 924         int err;
 925
 926         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
 927                                                   &pool_index);
 928         if (err)
 929                 return err;
 930
 931         err = devlink_sb_th_type_get_from_info(info, &threshold_type);
 932         if (err)
 933                 return err;
 934
 935         if (!info->attrs[DEVLINK_ATTR_SB_POOL_SIZE])
 936                 return -EINVAL;
 937
 938         size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]);
 939         return devlink_sb_pool_set(devlink, devlink_sb->index,
 940                                    pool_index, size, threshold_type);
 941 }
 942
 943 static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
 944                                         struct devlink *devlink,
 945                                         struct devlink_port *devlink_port,
 946                                         struct devlink_sb *devlink_sb,
 947                                         u16 pool_index,
 948                                         enum devlink_command cmd,
 949                                         u32 portid, u32 seq, int flags)
 950 {
 951         const struct devlink_ops *ops = devlink->ops;
 952         u32 threshold;
 953         void *hdr;
 954         int err;
 955
 956         err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
 957                                     pool_index, &threshold);
 958         if (err)
 959                 return err;
 960
 961         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 962         if (!hdr)
 963                 return -EMSGSIZE;
 964
 965         if (devlink_nl_put_handle(msg, devlink))
 966                 goto nla_put_failure;
 967         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
 968                 goto nla_put_failure;
 969         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
 970                 goto nla_put_failure;
 971         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
 972                 goto nla_put_failure;
 973         if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
 974                 goto nla_put_failure;
 975
 976         if (ops->sb_occ_port_pool_get) {
 977                 u32 cur;
 978                 u32 max;
 979
 980                 err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
 981                                                 pool_index, &cur, &max);
 982                 if (err && err != -EOPNOTSUPP)
 983                         return err;
 984                 if (!err) {
 985                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
 986                                 goto nla_put_failure;
 987                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
 988                                 goto nla_put_failure;
 989                 }
 990         }
 991
 992         genlmsg_end(msg, hdr);
 993         return 0;
 994
 995 nla_put_failure:
 996         genlmsg_cancel(msg, hdr);
 997         return -EMSGSIZE;
 998 }
 999
1000 static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
1001                                                 struct genl_info *info)
1002 {
1003         struct devlink_port *devlink_port = info->user_ptr[0];
1004         struct devlink *devlink = devlink_port->devlink;
1005         struct devlink_sb *devlink_sb = info->user_ptr[1];
1006         struct sk_buff *msg;
1007         u16 pool_index;
1008         int err;
1009
1010         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1011                                                   &pool_index);
1012         if (err)
1013                 return err;
1014
1015         if (!devlink->ops || !devlink->ops->sb_port_pool_get)
1016                 return -EOPNOTSUPP;
1017
1018         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1019         if (!msg)
1020                 return -ENOMEM;
1021
1022         err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port,
1023                                            devlink_sb, pool_index,
1024                                            DEVLINK_CMD_SB_PORT_POOL_NEW,
1025                                            info->snd_portid, info->snd_seq, 0);
1026         if (err) {
1027                 nlmsg_free(msg);
1028                 return err;
1029         }
1030
1031         return genlmsg_reply(msg, info);
1032 }
1033
1034 static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1035                                      struct devlink *devlink,
1036                                      struct devlink_sb *devlink_sb,
1037                                      u32 portid, u32 seq)
1038 {
1039         struct devlink_port *devlink_port;
1040         u16 pool_count = devlink_sb_pool_count(devlink_sb);
1041         u16 pool_index;
1042         int err;
1043
1044         list_for_each_entry(devlink_port, &devlink->port_list, list) {
1045                 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1046                         if (*p_idx < start) {
1047                                 (*p_idx)++;
1048                                 continue;
1049                         }
1050                         err = devlink_nl_sb_port_pool_fill(msg, devlink,
1051                                                            devlink_port,
1052                                                            devlink_sb,
1053                                                            pool_index,
1054                                                            DEVLINK_CMD_SB_PORT_POOL_NEW,
1055                                                            portid, seq,
1056                                                            NLM_F_MULTI);
1057                         if (err)
1058                                 return err;
1059                         (*p_idx)++;
1060                 }
1061         }
1062         return 0;
1063 }
1064
1065 static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg,
1066                                                   struct netlink_callback *cb)
1067 {
1068         struct devlink *devlink;
1069         struct devlink_sb *devlink_sb;
1070         int start = cb->args[0];
1071         int idx = 0;
1072         int err;
1073
1074         mutex_lock(&devlink_mutex);
1075         mutex_lock(&devlink_port_mutex);
1076         list_for_each_entry(devlink, &devlink_list, list) {
1077                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1078                     !devlink->ops || !devlink->ops->sb_port_pool_get)
1079                         continue;
1080                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1081                         err = __sb_port_pool_get_dumpit(msg, start, &idx,
1082                                                         devlink, devlink_sb,
1083                                                         NETLINK_CB(cb->skb).portid,
1084                                                         cb->nlh->nlmsg_seq);
1085                         if (err && err != -EOPNOTSUPP)
1086                                 goto out;
1087                 }
1088         }
1089 out:
1090         mutex_unlock(&devlink_port_mutex);
1091         mutex_unlock(&devlink_mutex);
1092
1093         cb->args[0] = idx;
1094         return msg->len;
1095 }
1096
1097 static int devlink_sb_port_pool_set(struct devlink_port *devlink_port,
1098                                     unsigned int sb_index, u16 pool_index,
1099                                     u32 threshold)
1100
1101 {
1102         const struct devlink_ops *ops = devlink_port->devlink->ops;
1103
1104         if (ops && ops->sb_port_pool_set)
1105                 return ops->sb_port_pool_set(devlink_port, sb_index,
1106                                              pool_index, threshold);
1107         return -EOPNOTSUPP;
1108 }
1109
1110 static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb,
1111                                                 struct genl_info *info)
1112 {
1113         struct devlink_port *devlink_port = info->user_ptr[0];
1114         struct devlink_sb *devlink_sb = info->user_ptr[1];
1115         u16 pool_index;
1116         u32 threshold;
1117         int err;
1118
1119         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1120                                                   &pool_index);
1121         if (err)
1122                 return err;
1123
1124         if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1125                 return -EINVAL;
1126
1127         threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1128         return devlink_sb_port_pool_set(devlink_port, devlink_sb->index,
1129                                         pool_index, threshold);
1130 }
1131
1132 static int
1133 devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
1134                                 struct devlink_port *devlink_port,
1135                                 struct devlink_sb *devlink_sb, u16 tc_index,
1136                                 enum devlink_sb_pool_type pool_type,
1137                                 enum devlink_command cmd,
1138                                 u32 portid, u32 seq, int flags)
1139 {
1140         const struct devlink_ops *ops = devlink->ops;
1141         u16 pool_index;
1142         u32 threshold;
1143         void *hdr;
1144         int err;
1145
1146         err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
1147                                        tc_index, pool_type,
1148                                        &pool_index, &threshold);
1149         if (err)
1150                 return err;
1151
1152         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1153         if (!hdr)
1154                 return -EMSGSIZE;
1155
1156         if (devlink_nl_put_handle(msg, devlink))
1157                 goto nla_put_failure;
1158         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1159                 goto nla_put_failure;
1160         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1161                 goto nla_put_failure;
1162         if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index))
1163                 goto nla_put_failure;
1164         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type))
1165                 goto nla_put_failure;
1166         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1167                 goto nla_put_failure;
1168         if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1169                 goto nla_put_failure;
1170
1171         if (ops->sb_occ_tc_port_bind_get) {
1172                 u32 cur;
1173                 u32 max;
1174
1175                 err = ops->sb_occ_tc_port_bind_get(devlink_port,
1176                                                    devlink_sb->index,
1177                                                    tc_index, pool_type,
1178                                                    &cur, &max);
1179                 if (err && err != -EOPNOTSUPP)
1180                         return err;
1181                 if (!err) {
1182                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1183                                 goto nla_put_failure;
1184                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1185                                 goto nla_put_failure;
1186                 }
1187         }
1188
1189         genlmsg_end(msg, hdr);
1190         return 0;
1191
1192 nla_put_failure:
1193         genlmsg_cancel(msg, hdr);
1194         return -EMSGSIZE;
1195 }
1196
1197 static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
1198                                                    struct genl_info *info)
1199 {
1200         struct devlink_port *devlink_port = info->user_ptr[0];
1201         struct devlink *devlink = devlink_port->devlink;
1202         struct devlink_sb *devlink_sb = info->user_ptr[1];
1203         struct sk_buff *msg;
1204         enum devlink_sb_pool_type pool_type;
1205         u16 tc_index;
1206         int err;
1207
1208         err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1209         if (err)
1210                 return err;
1211
1212         err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1213                                                 pool_type, &tc_index);
1214         if (err)
1215                 return err;
1216
1217         if (!devlink->ops || !devlink->ops->sb_tc_pool_bind_get)
1218                 return -EOPNOTSUPP;
1219
1220         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1221         if (!msg)
1222                 return -ENOMEM;
1223
1224         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port,
1225                                               devlink_sb, tc_index, pool_type,
1226                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1227                                               info->snd_portid,
1228                                               info->snd_seq, 0);
1229         if (err) {
1230                 nlmsg_free(msg);
1231                 return err;
1232         }
1233
1234         return genlmsg_reply(msg, info);
1235 }
1236
1237 static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1238                                         int start, int *p_idx,
1239                                         struct devlink *devlink,
1240                                         struct devlink_sb *devlink_sb,
1241                                         u32 portid, u32 seq)
1242 {
1243         struct devlink_port *devlink_port;
1244         u16 tc_index;
1245         int err;
1246
1247         list_for_each_entry(devlink_port, &devlink->port_list, list) {
1248                 for (tc_index = 0;
1249                      tc_index < devlink_sb->ingress_tc_count; tc_index++) {
1250                         if (*p_idx < start) {
1251                                 (*p_idx)++;
1252                                 continue;
1253                         }
1254                         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1255                                                               devlink_port,
1256                                                               devlink_sb,
1257                                                               tc_index,
1258                                                               DEVLINK_SB_POOL_TYPE_INGRESS,
1259                                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1260                                                               portid, seq,
1261                                                               NLM_F_MULTI);
1262                         if (err)
1263                                 return err;
1264                         (*p_idx)++;
1265                 }
1266                 for (tc_index = 0;
1267                      tc_index < devlink_sb->egress_tc_count; tc_index++) {
1268                         if (*p_idx < start) {
1269                                 (*p_idx)++;
1270                                 continue;
1271                         }
1272                         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1273                                                               devlink_port,
1274                                                               devlink_sb,
1275                                                               tc_index,
1276                                                               DEVLINK_SB_POOL_TYPE_EGRESS,
1277                                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1278                                                               portid, seq,
1279                                                               NLM_F_MULTI);
1280                         if (err)
1281                                 return err;
1282                         (*p_idx)++;
1283                 }
1284         }
1285         return 0;
1286 }
1287
1288 static int
1289 devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1290                                           struct netlink_callback *cb)
1291 {
1292         struct devlink *devlink;
1293         struct devlink_sb *devlink_sb;
1294         int start = cb->args[0];
1295         int idx = 0;
1296         int err;
1297
1298         mutex_lock(&devlink_mutex);
1299         mutex_lock(&devlink_port_mutex);
1300         list_for_each_entry(devlink, &devlink_list, list) {
1301                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1302                     !devlink->ops || !devlink->ops->sb_tc_pool_bind_get)
1303                         continue;
1304                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1305                         err = __sb_tc_pool_bind_get_dumpit(msg, start, &idx,
1306                                                            devlink,
1307                                                            devlink_sb,
1308                                                            NETLINK_CB(cb->skb).portid,
1309                                                            cb->nlh->nlmsg_seq);
1310                         if (err && err != -EOPNOTSUPP)
1311                                 goto out;
1312                 }
1313         }
1314 out:
1315         mutex_unlock(&devlink_port_mutex);
1316         mutex_unlock(&devlink_mutex);
1317
1318         cb->args[0] = idx;
1319         return msg->len;
1320 }
1321
1322 static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
1323                                        unsigned int sb_index, u16 tc_index,
1324                                        enum devlink_sb_pool_type pool_type,
1325                                        u16 pool_index, u32 threshold)
1326
1327 {
1328         const struct devlink_ops *ops = devlink_port->devlink->ops;
1329
1330         if (ops && ops->sb_tc_pool_bind_set)
1331                 return ops->sb_tc_pool_bind_set(devlink_port, sb_index,
1332                                                 tc_index, pool_type,
1333                                                 pool_index, threshold);
1334         return -EOPNOTSUPP;
1335 }
1336
1337 static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
1338                                                    struct genl_info *info)
1339 {
1340         struct devlink_port *devlink_port = info->user_ptr[0];
1341         struct devlink_sb *devlink_sb = info->user_ptr[1];
1342         enum devlink_sb_pool_type pool_type;
1343         u16 tc_index;
1344         u16 pool_index;
1345         u32 threshold;
1346         int err;
1347
1348         err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1349         if (err)
1350                 return err;
1351
1352         err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1353                                                 pool_type, &tc_index);
1354         if (err)
1355                 return err;
1356
1357         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1358                                                   &pool_index);
1359         if (err)
1360                 return err;
1361
1362         if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1363                 return -EINVAL;
1364
1365         threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1366         return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index,
1367                                            tc_index, pool_type,
1368                                            pool_index, threshold);
1369 }
1370
1371 static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
1372                                                struct genl_info *info)
1373 {
1374         struct devlink *devlink = info->user_ptr[0];
1375         struct devlink_sb *devlink_sb = info->user_ptr[1];
1376         const struct devlink_ops *ops = devlink->ops;
1377
1378         if (ops && ops->sb_occ_snapshot)
1379                 return ops->sb_occ_snapshot(devlink, devlink_sb->index);
1380         return -EOPNOTSUPP;
1381 }
1382
1383 static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
1384                                                 struct genl_info *info)
1385 {
1386         struct devlink *devlink = info->user_ptr[0];
1387         struct devlink_sb *devlink_sb = info->user_ptr[1];
1388         const struct devlink_ops *ops = devlink->ops;
1389
1390         if (ops && ops->sb_occ_max_clear)
1391                 return ops->sb_occ_max_clear(devlink, devlink_sb->index);
1392         return -EOPNOTSUPP;
1393 }
1394
1395 static int devlink_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
1396                                 enum devlink_command cmd, u32 portid,
1397                                 u32 seq, int flags, u16 mode)
1398 {
1399         void *hdr;
1400
1401         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1402         if (!hdr)
1403                 return -EMSGSIZE;
1404
1405         if (devlink_nl_put_handle(msg, devlink))
1406                 goto nla_put_failure;
1407
1408         if (nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode))
1409                 goto nla_put_failure;
1410
1411         genlmsg_end(msg, hdr);
1412         return 0;
1413
1414 nla_put_failure:
1415         genlmsg_cancel(msg, hdr);
1416         return -EMSGSIZE;
1417 }
1418
1419 static int devlink_nl_cmd_eswitch_mode_get_doit(struct sk_buff *skb,
1420                                                 struct genl_info *info)
1421 {
1422         struct devlink *devlink = info->user_ptr[0];
1423         const struct devlink_ops *ops = devlink->ops;
1424         struct sk_buff *msg;
1425         u16 mode;
1426         int err;
1427
1428         if (!ops || !ops->eswitch_mode_get)
1429                 return -EOPNOTSUPP;
1430
1431         err = ops->eswitch_mode_get(devlink, &mode);
1432         if (err)
1433                 return err;
1434
1435         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1436         if (!msg)
1437                 return -ENOMEM;
1438
1439         err = devlink_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_MODE_GET,
1440                                    info->snd_portid, info->snd_seq, 0, mode);
1441
1442         if (err) {
1443                 nlmsg_free(msg);
1444                 return err;
1445         }
1446
1447         return genlmsg_reply(msg, info);
1448 }
1449
1450 static int devlink_nl_cmd_eswitch_mode_set_doit(struct sk_buff *skb,
1451                                                 struct genl_info *info)
1452 {
1453         struct devlink *devlink = info->user_ptr[0];
1454         const struct devlink_ops *ops = devlink->ops;
1455         u16 mode;
1456
1457         if (!info->attrs[DEVLINK_ATTR_ESWITCH_MODE])
1458                 return -EINVAL;
1459
1460         mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
1461
1462         if (ops && ops->eswitch_mode_set)
1463                 return ops->eswitch_mode_set(devlink, mode);
1464         return -EOPNOTSUPP;
1465 }
1466
1467 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
1468         [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
1469         [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
1470         [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
1471         [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
1472         [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
1473         [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
1474         [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
1475         [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
1476         [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
1477         [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
1478         [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
1479         [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
1480         [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
1481 };
1482
1483 static const struct genl_ops devlink_nl_ops[] = {
1484         {
1485                 .cmd = DEVLINK_CMD_GET,
1486                 .doit = devlink_nl_cmd_get_doit,
1487                 .dumpit = devlink_nl_cmd_get_dumpit,
1488                 .policy = devlink_nl_policy,
1489                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
1490                 /* can be retrieved by unprivileged users */
1491         },
1492         {
1493                 .cmd = DEVLINK_CMD_PORT_GET,
1494                 .doit = devlink_nl_cmd_port_get_doit,
1495                 .dumpit = devlink_nl_cmd_port_get_dumpit,
1496                 .policy = devlink_nl_policy,
1497                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
1498                 /* can be retrieved by unprivileged users */
1499         },
1500         {
1501                 .cmd = DEVLINK_CMD_PORT_SET,
1502                 .doit = devlink_nl_cmd_port_set_doit,
1503                 .policy = devlink_nl_policy,
1504                 .flags = GENL_ADMIN_PERM,
1505                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
1506         },
1507         {
1508                 .cmd = DEVLINK_CMD_PORT_SPLIT,
1509                 .doit = devlink_nl_cmd_port_split_doit,
1510                 .policy = devlink_nl_policy,
1511                 .flags = GENL_ADMIN_PERM,
1512                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
1513         },
1514         {
1515                 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
1516                 .doit = devlink_nl_cmd_port_unsplit_doit,
1517                 .policy = devlink_nl_policy,
1518                 .flags = GENL_ADMIN_PERM,
1519                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
1520         },
1521         {
1522                 .cmd = DEVLINK_CMD_SB_GET,
1523                 .doit = devlink_nl_cmd_sb_get_doit,
1524                 .dumpit = devlink_nl_cmd_sb_get_dumpit,
1525                 .policy = devlink_nl_policy,
1526                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
1527                                   DEVLINK_NL_FLAG_NEED_SB,
1528                 /* can be retrieved by unprivileged users */
1529         },
1530         {
1531                 .cmd = DEVLINK_CMD_SB_POOL_GET,
1532                 .doit = devlink_nl_cmd_sb_pool_get_doit,
1533                 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
1534                 .policy = devlink_nl_policy,
1535                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
1536                                   DEVLINK_NL_FLAG_NEED_SB,
1537                 /* can be retrieved by unprivileged users */
1538         },
1539         {
1540                 .cmd = DEVLINK_CMD_SB_POOL_SET,
1541                 .doit = devlink_nl_cmd_sb_pool_set_doit,
1542                 .policy = devlink_nl_policy,
1543                 .flags = GENL_ADMIN_PERM,
1544                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
1545                                   DEVLINK_NL_FLAG_NEED_SB,
1546         },
1547         {
1548                 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
1549                 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
1550                 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
1551                 .policy = devlink_nl_policy,
1552                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
1553                                   DEVLINK_NL_FLAG_NEED_SB,
1554                 /* can be retrieved by unprivileged users */
1555         },
1556         {
1557                 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
1558                 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
1559                 .policy = devlink_nl_policy,
1560                 .flags = GENL_ADMIN_PERM,
1561                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
1562                                   DEVLINK_NL_FLAG_NEED_SB,
1563         },
1564         {
1565                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
1566                 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
1567                 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
1568                 .policy = devlink_nl_policy,
1569                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
1570                                   DEVLINK_NL_FLAG_NEED_SB,
1571                 /* can be retrieved by unprivileged users */
1572         },
1573         {
1574                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
1575                 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
1576                 .policy = devlink_nl_policy,
1577                 .flags = GENL_ADMIN_PERM,
1578                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
1579                                   DEVLINK_NL_FLAG_NEED_SB,
1580         },
1581         {
1582                 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
1583                 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
1584                 .policy = devlink_nl_policy,
1585                 .flags = GENL_ADMIN_PERM,
1586                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
1587                                   DEVLINK_NL_FLAG_NEED_SB |
1588                                   DEVLINK_NL_FLAG_LOCK_PORTS,
1589         },
1590         {
1591                 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
1592                 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
1593                 .policy = devlink_nl_policy,
1594                 .flags = GENL_ADMIN_PERM,
1595                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
1596                                   DEVLINK_NL_FLAG_NEED_SB |
1597                                   DEVLINK_NL_FLAG_LOCK_PORTS,
1598         },
1599         {
1600                 .cmd = DEVLINK_CMD_ESWITCH_MODE_GET,
1601                 .doit = devlink_nl_cmd_eswitch_mode_get_doit,
1602                 .policy = devlink_nl_policy,
1603                 .flags = GENL_ADMIN_PERM,
1604                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
1605         },
1606         {
1607                 .cmd = DEVLINK_CMD_ESWITCH_MODE_SET,
1608                 .doit = devlink_nl_cmd_eswitch_mode_set_doit,
1609                 .policy = devlink_nl_policy,
1610                 .flags = GENL_ADMIN_PERM,
1611                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
1612         },
1613 };
1614
1615 static struct genl_family devlink_nl_family __ro_after_init = {
1616         .name           = DEVLINK_GENL_NAME,
1617         .version        = DEVLINK_GENL_VERSION,
1618         .maxattr        = DEVLINK_ATTR_MAX,
1619         .netnsok        = true,
1620         .pre_doit       = devlink_nl_pre_doit,
1621         .post_doit      = devlink_nl_post_doit,
1622         .module         = THIS_MODULE,
1623         .ops            = devlink_nl_ops,
1624         .n_ops          = ARRAY_SIZE(devlink_nl_ops),
1625         .mcgrps         = devlink_nl_mcgrps,
1626         .n_mcgrps       = ARRAY_SIZE(devlink_nl_mcgrps),
1627 };
1628
1629 /**
1630  *      devlink_alloc - Allocate new devlink instance resources
1631  *
1632  *      @ops: ops
1633  *      @priv_size: size of user private data
1634  *
1635  *      Allocate new devlink instance resources, including devlink index
1636  *      and name.
1637  */
1638 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
1639 {
1640         struct devlink *devlink;
1641
1642         devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
1643         if (!devlink)
1644                 return NULL;
1645         devlink->ops = ops;
1646         devlink_net_set(devlink, &init_net);
1647         INIT_LIST_HEAD(&devlink->port_list);
1648         INIT_LIST_HEAD(&devlink->sb_list);
1649         return devlink;
1650 }
1651 EXPORT_SYMBOL_GPL(devlink_alloc);
1652
1653 /**
1654  *      devlink_register - Register devlink instance
1655  *
1656  *      @devlink: devlink
1657  */
1658 int devlink_register(struct devlink *devlink, struct device *dev)
1659 {
1660         mutex_lock(&devlink_mutex);
1661         devlink->dev = dev;
1662         list_add_tail(&devlink->list, &devlink_list);
1663         devlink_notify(devlink, DEVLINK_CMD_NEW);
1664         mutex_unlock(&devlink_mutex);
1665         return 0;
1666 }
1667 EXPORT_SYMBOL_GPL(devlink_register);
1668
1669 /**
1670  *      devlink_unregister - Unregister devlink instance
1671  *
1672  *      @devlink: devlink
1673  */
1674 void devlink_unregister(struct devlink *devlink)
1675 {
1676         mutex_lock(&devlink_mutex);
1677         devlink_notify(devlink, DEVLINK_CMD_DEL);
1678         list_del(&devlink->list);
1679         mutex_unlock(&devlink_mutex);
1680 }
1681 EXPORT_SYMBOL_GPL(devlink_unregister);
1682
1683 /**
1684  *      devlink_free - Free devlink instance resources
1685  *
1686  *      @devlink: devlink
1687  */
1688 void devlink_free(struct devlink *devlink)
1689 {
1690         kfree(devlink);
1691 }
1692 EXPORT_SYMBOL_GPL(devlink_free);
1693
1694 /**
1695  *      devlink_port_register - Register devlink port
1696  *
1697  *      @devlink: devlink
1698  *      @devlink_port: devlink port
1699  *      @port_index
1700  *
1701  *      Register devlink port with provided port index. User can use
1702  *      any indexing, even hw-related one. devlink_port structure
1703  *      is convenient to be embedded inside user driver private structure.
1704  *      Note that the caller should take care of zeroing the devlink_port
1705  *      structure.
1706  */
1707 int devlink_port_register(struct devlink *devlink,
1708                           struct devlink_port *devlink_port,
1709                           unsigned int port_index)
1710 {
1711         mutex_lock(&devlink_port_mutex);
1712         if (devlink_port_index_exists(devlink, port_index)) {
1713                 mutex_unlock(&devlink_port_mutex);
1714                 return -EEXIST;
1715         }
1716         devlink_port->devlink = devlink;
1717         devlink_port->index = port_index;
1718         devlink_port->registered = true;
1719         list_add_tail(&devlink_port->list, &devlink->port_list);
1720         mutex_unlock(&devlink_port_mutex);
1721         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
1722         return 0;
1723 }
1724 EXPORT_SYMBOL_GPL(devlink_port_register);
1725
1726 /**
1727  *      devlink_port_unregister - Unregister devlink port
1728  *
1729  *      @devlink_port: devlink port
1730  */
1731 void devlink_port_unregister(struct devlink_port *devlink_port)
1732 {
1733         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
1734         mutex_lock(&devlink_port_mutex);
1735         list_del(&devlink_port->list);
1736         mutex_unlock(&devlink_port_mutex);
1737 }
1738 EXPORT_SYMBOL_GPL(devlink_port_unregister);
1739
1740 static void __devlink_port_type_set(struct devlink_port *devlink_port,
1741                                     enum devlink_port_type type,
1742                                     void *type_dev)
1743 {
1744         devlink_port->type = type;
1745         devlink_port->type_dev = type_dev;
1746         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
1747 }
1748
1749 /**
1750  *      devlink_port_type_eth_set - Set port type to Ethernet
1751  *
1752  *      @devlink_port: devlink port
1753  *      @netdev: related netdevice
1754  */
1755 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
1756                                struct net_device *netdev)
1757 {
1758         return __devlink_port_type_set(devlink_port,
1759                                        DEVLINK_PORT_TYPE_ETH, netdev);
1760 }
1761 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
1762
1763 /**
1764  *      devlink_port_type_ib_set - Set port type to InfiniBand
1765  *
1766  *      @devlink_port: devlink port
1767  *      @ibdev: related IB device
1768  */
1769 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
1770                               struct ib_device *ibdev)
1771 {
1772         return __devlink_port_type_set(devlink_port,
1773                                        DEVLINK_PORT_TYPE_IB, ibdev);
1774 }
1775 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
1776
1777 /**
1778  *      devlink_port_type_clear - Clear port type
1779  *
1780  *      @devlink_port: devlink port
1781  */
1782 void devlink_port_type_clear(struct devlink_port *devlink_port)
1783 {
1784         return __devlink_port_type_set(devlink_port,
1785                                        DEVLINK_PORT_TYPE_NOTSET, NULL);
1786 }
1787 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
1788
1789 /**
1790  *      devlink_port_split_set - Set port is split
1791  *
1792  *      @devlink_port: devlink port
1793  *      @split_group: split group - identifies group split port is part of
1794  */
1795 void devlink_port_split_set(struct devlink_port *devlink_port,
1796                             u32 split_group)
1797 {
1798         devlink_port->split = true;
1799         devlink_port->split_group = split_group;
1800         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
1801 }
1802 EXPORT_SYMBOL_GPL(devlink_port_split_set);
1803
1804 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
1805                         u32 size, u16 ingress_pools_count,
1806                         u16 egress_pools_count, u16 ingress_tc_count,
1807                         u16 egress_tc_count)
1808 {
1809         struct devlink_sb *devlink_sb;
1810         int err = 0;
1811
1812         mutex_lock(&devlink_mutex);
1813         if (devlink_sb_index_exists(devlink, sb_index)) {
1814                 err = -EEXIST;
1815                 goto unlock;
1816         }
1817
1818         devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
1819         if (!devlink_sb) {
1820                 err = -ENOMEM;
1821                 goto unlock;
1822         }
1823         devlink_sb->index = sb_index;
1824         devlink_sb->size = size;
1825         devlink_sb->ingress_pools_count = ingress_pools_count;
1826         devlink_sb->egress_pools_count = egress_pools_count;
1827         devlink_sb->ingress_tc_count = ingress_tc_count;
1828         devlink_sb->egress_tc_count = egress_tc_count;
1829         list_add_tail(&devlink_sb->list, &devlink->sb_list);
1830 unlock:
1831         mutex_unlock(&devlink_mutex);
1832         return err;
1833 }
1834 EXPORT_SYMBOL_GPL(devlink_sb_register);
1835
1836 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
1837 {
1838         struct devlink_sb *devlink_sb;
1839
1840         mutex_lock(&devlink_mutex);
1841         devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
1842         WARN_ON(!devlink_sb);
1843         list_del(&devlink_sb->list);
1844         mutex_unlock(&devlink_mutex);
1845         kfree(devlink_sb);
1846 }
1847 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
1848
1849 static int __init devlink_module_init(void)
1850 {
1851         return genl_register_family(&devlink_nl_family);
1852 }
1853
1854 static void __exit devlink_module_exit(void)
1855 {
1856         genl_unregister_family(&devlink_nl_family);
1857 }
1858
1859 module_init(devlink_module_init);
1860 module_exit(devlink_module_exit);
1861
1862 MODULE_LICENSE("GPL v2");
1863 MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
1864 MODULE_DESCRIPTION("Network physical device Netlink interface");
1865 MODULE_ALIAS_GENL_FAMILY(DEVLINK_GENL_NAME);