net/core/devlink.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * net/core/devlink.c - Network physical/parent device Netlink interface
   4  *
   5  * Heavily inspired by net/wireless/
   6  * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
   7  * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/types.h>
  13 #include <linux/slab.h>
  14 #include <linux/gfp.h>
  15 #include <linux/device.h>
  16 #include <linux/list.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/spinlock.h>
  19 #include <linux/refcount.h>
  20 #include <linux/workqueue.h>
  21 #include <linux/u64_stats_sync.h>
  22 #include <linux/timekeeping.h>
  23 #include <rdma/ib_verbs.h>
  24 #include <net/netlink.h>
  25 #include <net/genetlink.h>
  26 #include <net/rtnetlink.h>
  27 #include <net/net_namespace.h>
  28 #include <net/sock.h>
  29 #include <net/devlink.h>
  30 #include <net/drop_monitor.h>
  31 #define CREATE_TRACE_POINTS
  32 #include <trace/events/devlink.h>
  33
  34 static struct devlink_dpipe_field devlink_dpipe_fields_ethernet[] = {
  35         {
  36                 .name = "destination mac",
  37                 .id = DEVLINK_DPIPE_FIELD_ETHERNET_DST_MAC,
  38                 .bitwidth = 48,
  39         },
  40 };
  41
  42 struct devlink_dpipe_header devlink_dpipe_header_ethernet = {
  43         .name = "ethernet",
  44         .id = DEVLINK_DPIPE_HEADER_ETHERNET,
  45         .fields = devlink_dpipe_fields_ethernet,
  46         .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ethernet),
  47         .global = true,
  48 };
  49 EXPORT_SYMBOL(devlink_dpipe_header_ethernet);
  50
  51 static struct devlink_dpipe_field devlink_dpipe_fields_ipv4[] = {
  52         {
  53                 .name = "destination ip",
  54                 .id = DEVLINK_DPIPE_FIELD_IPV4_DST_IP,
  55                 .bitwidth = 32,
  56         },
  57 };
  58
  59 struct devlink_dpipe_header devlink_dpipe_header_ipv4 = {
  60         .name = "ipv4",
  61         .id = DEVLINK_DPIPE_HEADER_IPV4,
  62         .fields = devlink_dpipe_fields_ipv4,
  63         .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv4),
  64         .global = true,
  65 };
  66 EXPORT_SYMBOL(devlink_dpipe_header_ipv4);
  67
  68 static struct devlink_dpipe_field devlink_dpipe_fields_ipv6[] = {
  69         {
  70                 .name = "destination ip",
  71                 .id = DEVLINK_DPIPE_FIELD_IPV6_DST_IP,
  72                 .bitwidth = 128,
  73         },
  74 };
  75
  76 struct devlink_dpipe_header devlink_dpipe_header_ipv6 = {
  77         .name = "ipv6",
  78         .id = DEVLINK_DPIPE_HEADER_IPV6,
  79         .fields = devlink_dpipe_fields_ipv6,
  80         .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv6),
  81         .global = true,
  82 };
  83 EXPORT_SYMBOL(devlink_dpipe_header_ipv6);
  84
  85 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
  86 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr);
  87
  88 static LIST_HEAD(devlink_list);
  89
  90 /* devlink_mutex
  91  *
  92  * An overall lock guarding every operation coming from userspace.
  93  * It also guards devlink devices list and it is taken when
  94  * driver registers/unregisters it.
  95  */
  96 static DEFINE_MUTEX(devlink_mutex);
  97
  98 struct net *devlink_net(const struct devlink *devlink)
  99 {
 100         return read_pnet(&devlink->_net);
 101 }
 102 EXPORT_SYMBOL_GPL(devlink_net);
 103
 104 static void __devlink_net_set(struct devlink *devlink, struct net *net)
 105 {
 106         write_pnet(&devlink->_net, net);
 107 }
 108
 109 void devlink_net_set(struct devlink *devlink, struct net *net)
 110 {
 111         if (WARN_ON(devlink->registered))
 112                 return;
 113         __devlink_net_set(devlink, net);
 114 }
 115 EXPORT_SYMBOL_GPL(devlink_net_set);
 116
 117 static struct devlink *devlink_get_from_attrs(struct net *net,
 118                                               struct nlattr **attrs)
 119 {
 120         struct devlink *devlink;
 121         char *busname;
 122         char *devname;
 123
 124         if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])
 125                 return ERR_PTR(-EINVAL);
 126
 127         busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
 128         devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
 129
 130         lockdep_assert_held(&devlink_mutex);
 131
 132         list_for_each_entry(devlink, &devlink_list, list) {
 133                 if (strcmp(devlink->dev->bus->name, busname) == 0 &&
 134                     strcmp(dev_name(devlink->dev), devname) == 0 &&
 135                     net_eq(devlink_net(devlink), net))
 136                         return devlink;
 137         }
 138
 139         return ERR_PTR(-ENODEV);
 140 }
 141
 142 static struct devlink *devlink_get_from_info(struct genl_info *info)
 143 {
 144         return devlink_get_from_attrs(genl_info_net(info), info->attrs);
 145 }
 146
 147 static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
 148                                                       unsigned int port_index)
 149 {
 150         struct devlink_port *devlink_port;
 151
 152         list_for_each_entry(devlink_port, &devlink->port_list, list) {
 153                 if (devlink_port->index == port_index)
 154                         return devlink_port;
 155         }
 156         return NULL;
 157 }
 158
 159 static bool devlink_port_index_exists(struct devlink *devlink,
 160                                       unsigned int port_index)
 161 {
 162         return devlink_port_get_by_index(devlink, port_index);
 163 }
 164
 165 static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
 166                                                         struct nlattr **attrs)
 167 {
 168         if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
 169                 u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
 170                 struct devlink_port *devlink_port;
 171
 172                 devlink_port = devlink_port_get_by_index(devlink, port_index);
 173                 if (!devlink_port)
 174                         return ERR_PTR(-ENODEV);
 175                 return devlink_port;
 176         }
 177         return ERR_PTR(-EINVAL);
 178 }
 179
 180 static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
 181                                                        struct genl_info *info)
 182 {
 183         return devlink_port_get_from_attrs(devlink, info->attrs);
 184 }
 185
 186 struct devlink_sb {
 187         struct list_head list;
 188         unsigned int index;
 189         u32 size;
 190         u16 ingress_pools_count;
 191         u16 egress_pools_count;
 192         u16 ingress_tc_count;
 193         u16 egress_tc_count;
 194 };
 195
 196 static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb)
 197 {
 198         return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count;
 199 }
 200
 201 static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink,
 202                                                   unsigned int sb_index)
 203 {
 204         struct devlink_sb *devlink_sb;
 205
 206         list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
 207                 if (devlink_sb->index == sb_index)
 208                         return devlink_sb;
 209         }
 210         return NULL;
 211 }
 212
 213 static bool devlink_sb_index_exists(struct devlink *devlink,
 214                                     unsigned int sb_index)
 215 {
 216         return devlink_sb_get_by_index(devlink, sb_index);
 217 }
 218
 219 static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink,
 220                                                     struct nlattr **attrs)
 221 {
 222         if (attrs[DEVLINK_ATTR_SB_INDEX]) {
 223                 u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]);
 224                 struct devlink_sb *devlink_sb;
 225
 226                 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
 227                 if (!devlink_sb)
 228                         return ERR_PTR(-ENODEV);
 229                 return devlink_sb;
 230         }
 231         return ERR_PTR(-EINVAL);
 232 }
 233
 234 static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink,
 235                                                    struct genl_info *info)
 236 {
 237         return devlink_sb_get_from_attrs(devlink, info->attrs);
 238 }
 239
 240 static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb,
 241                                                 struct nlattr **attrs,
 242                                                 u16 *p_pool_index)
 243 {
 244         u16 val;
 245
 246         if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX])
 247                 return -EINVAL;
 248
 249         val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]);
 250         if (val >= devlink_sb_pool_count(devlink_sb))
 251                 return -EINVAL;
 252         *p_pool_index = val;
 253         return 0;
 254 }
 255
 256 static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb,
 257                                                struct genl_info *info,
 258                                                u16 *p_pool_index)
 259 {
 260         return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs,
 261                                                     p_pool_index);
 262 }
 263
 264 static int
 265 devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs,
 266                                     enum devlink_sb_pool_type *p_pool_type)
 267 {
 268         u8 val;
 269
 270         if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE])
 271                 return -EINVAL;
 272
 273         val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]);
 274         if (val != DEVLINK_SB_POOL_TYPE_INGRESS &&
 275             val != DEVLINK_SB_POOL_TYPE_EGRESS)
 276                 return -EINVAL;
 277         *p_pool_type = val;
 278         return 0;
 279 }
 280
 281 static int
 282 devlink_sb_pool_type_get_from_info(struct genl_info *info,
 283                                    enum devlink_sb_pool_type *p_pool_type)
 284 {
 285         return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type);
 286 }
 287
 288 static int
 289 devlink_sb_th_type_get_from_attrs(struct nlattr **attrs,
 290                                   enum devlink_sb_threshold_type *p_th_type)
 291 {
 292         u8 val;
 293
 294         if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])
 295                 return -EINVAL;
 296
 297         val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]);
 298         if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC &&
 299             val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC)
 300                 return -EINVAL;
 301         *p_th_type = val;
 302         return 0;
 303 }
 304
 305 static int
 306 devlink_sb_th_type_get_from_info(struct genl_info *info,
 307                                  enum devlink_sb_threshold_type *p_th_type)
 308 {
 309         return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type);
 310 }
 311
 312 static int
 313 devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb,
 314                                    struct nlattr **attrs,
 315                                    enum devlink_sb_pool_type pool_type,
 316                                    u16 *p_tc_index)
 317 {
 318         u16 val;
 319
 320         if (!attrs[DEVLINK_ATTR_SB_TC_INDEX])
 321                 return -EINVAL;
 322
 323         val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]);
 324         if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS &&
 325             val >= devlink_sb->ingress_tc_count)
 326                 return -EINVAL;
 327         if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS &&
 328             val >= devlink_sb->egress_tc_count)
 329                 return -EINVAL;
 330         *p_tc_index = val;
 331         return 0;
 332 }
 333
 334 static int
 335 devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
 336                                   struct genl_info *info,
 337                                   enum devlink_sb_pool_type pool_type,
 338                                   u16 *p_tc_index)
 339 {
 340         return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs,
 341                                                   pool_type, p_tc_index);
 342 }
 343
 344 struct devlink_region {
 345         struct devlink *devlink;
 346         struct list_head list;
 347         const char *name;
 348         struct list_head snapshot_list;
 349         u32 max_snapshots;
 350         u32 cur_snapshots;
 351         u64 size;
 352 };
 353
 354 struct devlink_snapshot {
 355         struct list_head list;
 356         struct devlink_region *region;
 357         devlink_snapshot_data_dest_t *data_destructor;
 358         u8 *data;
 359         u32 id;
 360 };
 361
 362 static struct devlink_region *
 363 devlink_region_get_by_name(struct devlink *devlink, const char *region_name)
 364 {
 365         struct devlink_region *region;
 366
 367         list_for_each_entry(region, &devlink->region_list, list)
 368                 if (!strcmp(region->name, region_name))
 369                         return region;
 370
 371         return NULL;
 372 }
 373
 374 static struct devlink_snapshot *
 375 devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id)
 376 {
 377         struct devlink_snapshot *snapshot;
 378
 379         list_for_each_entry(snapshot, &region->snapshot_list, list)
 380                 if (snapshot->id == id)
 381                         return snapshot;
 382
 383         return NULL;
 384 }
 385
 386 #define DEVLINK_NL_FLAG_NEED_DEVLINK    BIT(0)
 387 #define DEVLINK_NL_FLAG_NEED_PORT       BIT(1)
 388 #define DEVLINK_NL_FLAG_NEED_SB         BIT(2)
 389
 390 /* The per devlink instance lock is taken by default in the pre-doit
 391  * operation, yet several commands do not require this. The global
 392  * devlink lock is taken and protects from disruption by user-calls.
 393  */
 394 #define DEVLINK_NL_FLAG_NO_LOCK         BIT(3)
 395
 396 static int devlink_nl_pre_doit(const struct genl_ops *ops,
 397                                struct sk_buff *skb, struct genl_info *info)
 398 {
 399         struct devlink *devlink;
 400         int err;
 401
 402         mutex_lock(&devlink_mutex);
 403         devlink = devlink_get_from_info(info);
 404         if (IS_ERR(devlink)) {
 405                 mutex_unlock(&devlink_mutex);
 406                 return PTR_ERR(devlink);
 407         }
 408         if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
 409                 mutex_lock(&devlink->lock);
 410         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
 411                 info->user_ptr[0] = devlink;
 412         } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
 413                 struct devlink_port *devlink_port;
 414
 415                 devlink_port = devlink_port_get_from_info(devlink, info);
 416                 if (IS_ERR(devlink_port)) {
 417                         err = PTR_ERR(devlink_port);
 418                         goto unlock;
 419                 }
 420                 info->user_ptr[0] = devlink_port;
 421         }
 422         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_SB) {
 423                 struct devlink_sb *devlink_sb;
 424
 425                 devlink_sb = devlink_sb_get_from_info(devlink, info);
 426                 if (IS_ERR(devlink_sb)) {
 427                         err = PTR_ERR(devlink_sb);
 428                         goto unlock;
 429                 }
 430                 info->user_ptr[1] = devlink_sb;
 431         }
 432         return 0;
 433
 434 unlock:
 435         if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
 436                 mutex_unlock(&devlink->lock);
 437         mutex_unlock(&devlink_mutex);
 438         return err;
 439 }
 440
 441 static void devlink_nl_post_doit(const struct genl_ops *ops,
 442                                  struct sk_buff *skb, struct genl_info *info)
 443 {
 444         struct devlink *devlink;
 445
 446         /* When devlink changes netns, it would not be found
 447          * by devlink_get_from_info(). So try if it is stored first.
 448          */
 449         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
 450                 devlink = info->user_ptr[0];
 451         } else {
 452                 devlink = devlink_get_from_info(info);
 453                 WARN_ON(IS_ERR(devlink));
 454         }
 455         if (!IS_ERR(devlink) && ~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
 456                 mutex_unlock(&devlink->lock);
 457         mutex_unlock(&devlink_mutex);
 458 }
 459
 460 static struct genl_family devlink_nl_family;
 461
 462 enum devlink_multicast_groups {
 463         DEVLINK_MCGRP_CONFIG,
 464 };
 465
 466 static const struct genl_multicast_group devlink_nl_mcgrps[] = {
 467         [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },
 468 };
 469
 470 static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
 471 {
 472         if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
 473                 return -EMSGSIZE;
 474         if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
 475                 return -EMSGSIZE;
 476         return 0;
 477 }
 478
 479 static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
 480                            enum devlink_command cmd, u32 portid,
 481                            u32 seq, int flags)
 482 {
 483         void *hdr;
 484
 485         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 486         if (!hdr)
 487                 return -EMSGSIZE;
 488
 489         if (devlink_nl_put_handle(msg, devlink))
 490                 goto nla_put_failure;
 491         if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_FAILED, devlink->reload_failed))
 492                 goto nla_put_failure;
 493
 494         genlmsg_end(msg, hdr);
 495         return 0;
 496
 497 nla_put_failure:
 498         genlmsg_cancel(msg, hdr);
 499         return -EMSGSIZE;
 500 }
 501
 502 static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
 503 {
 504         struct sk_buff *msg;
 505         int err;
 506
 507         WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
 508
 509         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 510         if (!msg)
 511                 return;
 512
 513         err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
 514         if (err) {
 515                 nlmsg_free(msg);
 516                 return;
 517         }
 518
 519         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
 520                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
 521 }
 522
 523 static int devlink_nl_port_attrs_put(struct sk_buff *msg,
 524                                      struct devlink_port *devlink_port)
 525 {
 526         struct devlink_port_attrs *attrs = &devlink_port->attrs;
 527
 528         if (!attrs->set)
 529                 return 0;
 530         if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
 531                 return -EMSGSIZE;
 532         switch (devlink_port->attrs.flavour) {
 533         case DEVLINK_PORT_FLAVOUR_PCI_PF:
 534                 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
 535                                 attrs->pci_pf.pf))
 536                         return -EMSGSIZE;
 537                 break;
 538         case DEVLINK_PORT_FLAVOUR_PCI_VF:
 539                 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
 540                                 attrs->pci_vf.pf) ||
 541                     nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER,
 542                                 attrs->pci_vf.vf))
 543                         return -EMSGSIZE;
 544                 break;
 545         case DEVLINK_PORT_FLAVOUR_PHYSICAL:
 546         case DEVLINK_PORT_FLAVOUR_CPU:
 547         case DEVLINK_PORT_FLAVOUR_DSA:
 548                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER,
 549                                 attrs->phys.port_number))
 550                         return -EMSGSIZE;
 551                 if (!attrs->split)
 552                         return 0;
 553                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
 554                                 attrs->phys.port_number))
 555                         return -EMSGSIZE;
 556                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
 557                                 attrs->phys.split_subport_number))
 558                         return -EMSGSIZE;
 559                 break;
 560         default:
 561                 break;
 562         }
 563         return 0;
 564 }
 565
 566 static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
 567                                 struct devlink_port *devlink_port,
 568                                 enum devlink_command cmd, u32 portid,
 569                                 u32 seq, int flags)
 570 {
 571         void *hdr;
 572
 573         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 574         if (!hdr)
 575                 return -EMSGSIZE;
 576
 577         if (devlink_nl_put_handle(msg, devlink))
 578                 goto nla_put_failure;
 579         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
 580                 goto nla_put_failure;
 581
 582         spin_lock_bh(&devlink_port->type_lock);
 583         if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
 584                 goto nla_put_failure_type_locked;
 585         if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
 586             nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
 587                         devlink_port->desired_type))
 588                 goto nla_put_failure_type_locked;
 589         if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
 590                 struct net_device *netdev = devlink_port->type_dev;
 591
 592                 if (netdev &&
 593                     (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
 594                                  netdev->ifindex) ||
 595                      nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
 596                                     netdev->name)))
 597                         goto nla_put_failure_type_locked;
 598         }
 599         if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
 600                 struct ib_device *ibdev = devlink_port->type_dev;
 601
 602                 if (ibdev &&
 603                     nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
 604                                    ibdev->name))
 605                         goto nla_put_failure_type_locked;
 606         }
 607         spin_unlock_bh(&devlink_port->type_lock);
 608         if (devlink_nl_port_attrs_put(msg, devlink_port))
 609                 goto nla_put_failure;
 610
 611         genlmsg_end(msg, hdr);
 612         return 0;
 613
 614 nla_put_failure_type_locked:
 615         spin_unlock_bh(&devlink_port->type_lock);
 616 nla_put_failure:
 617         genlmsg_cancel(msg, hdr);
 618         return -EMSGSIZE;
 619 }
 620
 621 static void devlink_port_notify(struct devlink_port *devlink_port,
 622                                 enum devlink_command cmd)
 623 {
 624         struct devlink *devlink = devlink_port->devlink;
 625         struct sk_buff *msg;
 626         int err;
 627
 628         if (!devlink_port->registered)
 629                 return;
 630
 631         WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
 632
 633         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 634         if (!msg)
 635                 return;
 636
 637         err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0);
 638         if (err) {
 639                 nlmsg_free(msg);
 640                 return;
 641         }
 642
 643         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
 644                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
 645 }
 646
 647 static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info)
 648 {
 649         struct devlink *devlink = info->user_ptr[0];
 650         struct sk_buff *msg;
 651         int err;
 652
 653         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 654         if (!msg)
 655                 return -ENOMEM;
 656
 657         err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
 658                               info->snd_portid, info->snd_seq, 0);
 659         if (err) {
 660                 nlmsg_free(msg);
 661                 return err;
 662         }
 663
 664         return genlmsg_reply(msg, info);
 665 }
 666
 667 static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg,
 668                                      struct netlink_callback *cb)
 669 {
 670         struct devlink *devlink;
 671         int start = cb->args[0];
 672         int idx = 0;
 673         int err;
 674
 675         mutex_lock(&devlink_mutex);
 676         list_for_each_entry(devlink, &devlink_list, list) {
 677                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 678                         continue;
 679                 if (idx < start) {
 680                         idx++;
 681                         continue;
 682                 }
 683                 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
 684                                       NETLINK_CB(cb->skb).portid,
 685                                       cb->nlh->nlmsg_seq, NLM_F_MULTI);
 686                 if (err)
 687                         goto out;
 688                 idx++;
 689         }
 690 out:
 691         mutex_unlock(&devlink_mutex);
 692
 693         cb->args[0] = idx;
 694         return msg->len;
 695 }
 696
 697 static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
 698                                         struct genl_info *info)
 699 {
 700         struct devlink_port *devlink_port = info->user_ptr[0];
 701         struct devlink *devlink = devlink_port->devlink;
 702         struct sk_buff *msg;
 703         int err;
 704
 705         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 706         if (!msg)
 707                 return -ENOMEM;
 708
 709         err = devlink_nl_port_fill(msg, devlink, devlink_port,
 710                                    DEVLINK_CMD_PORT_NEW,
 711                                    info->snd_portid, info->snd_seq, 0);
 712         if (err) {
 713                 nlmsg_free(msg);
 714                 return err;
 715         }
 716
 717         return genlmsg_reply(msg, info);
 718 }
 719
 720 static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
 721                                           struct netlink_callback *cb)
 722 {
 723         struct devlink *devlink;
 724         struct devlink_port *devlink_port;
 725         int start = cb->args[0];
 726         int idx = 0;
 727         int err;
 728
 729         mutex_lock(&devlink_mutex);
 730         list_for_each_entry(devlink, &devlink_list, list) {
 731                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 732                         continue;
 733                 mutex_lock(&devlink->lock);
 734                 list_for_each_entry(devlink_port, &devlink->port_list, list) {
 735                         if (idx < start) {
 736                                 idx++;
 737                                 continue;
 738                         }
 739                         err = devlink_nl_port_fill(msg, devlink, devlink_port,
 740                                                    DEVLINK_CMD_NEW,
 741                                                    NETLINK_CB(cb->skb).portid,
 742                                                    cb->nlh->nlmsg_seq,
 743                                                    NLM_F_MULTI);
 744                         if (err) {
 745                                 mutex_unlock(&devlink->lock);
 746                                 goto out;
 747                         }
 748                         idx++;
 749                 }
 750                 mutex_unlock(&devlink->lock);
 751         }
 752 out:
 753         mutex_unlock(&devlink_mutex);
 754
 755         cb->args[0] = idx;
 756         return msg->len;
 757 }
 758
 759 static int devlink_port_type_set(struct devlink *devlink,
 760                                  struct devlink_port *devlink_port,
 761                                  enum devlink_port_type port_type)
 762
 763 {
 764         int err;
 765
 766         if (devlink->ops->port_type_set) {
 767                 if (port_type == DEVLINK_PORT_TYPE_NOTSET)
 768                         return -EINVAL;
 769                 if (port_type == devlink_port->type)
 770                         return 0;
 771                 err = devlink->ops->port_type_set(devlink_port, port_type);
 772                 if (err)
 773                         return err;
 774                 devlink_port->desired_type = port_type;
 775                 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
 776                 return 0;
 777         }
 778         return -EOPNOTSUPP;
 779 }
 780
 781 static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
 782                                         struct genl_info *info)
 783 {
 784         struct devlink_port *devlink_port = info->user_ptr[0];
 785         struct devlink *devlink = devlink_port->devlink;
 786         int err;
 787
 788         if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
 789                 enum devlink_port_type port_type;
 790
 791                 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
 792                 err = devlink_port_type_set(devlink, devlink_port, port_type);
 793                 if (err)
 794                         return err;
 795         }
 796         return 0;
 797 }
 798
 799 static int devlink_port_split(struct devlink *devlink, u32 port_index,
 800                               u32 count, struct netlink_ext_ack *extack)
 801
 802 {
 803         if (devlink->ops->port_split)
 804                 return devlink->ops->port_split(devlink, port_index, count,
 805                                                 extack);
 806         return -EOPNOTSUPP;
 807 }
 808
 809 static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
 810                                           struct genl_info *info)
 811 {
 812         struct devlink *devlink = info->user_ptr[0];
 813         u32 port_index;
 814         u32 count;
 815
 816         if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
 817             !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
 818                 return -EINVAL;
 819
 820         port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
 821         count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
 822         return devlink_port_split(devlink, port_index, count, info->extack);
 823 }
 824
 825 static int devlink_port_unsplit(struct devlink *devlink, u32 port_index,
 826                                 struct netlink_ext_ack *extack)
 827
 828 {
 829         if (devlink->ops->port_unsplit)
 830                 return devlink->ops->port_unsplit(devlink, port_index, extack);
 831         return -EOPNOTSUPP;
 832 }
 833
 834 static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
 835                                             struct genl_info *info)
 836 {
 837         struct devlink *devlink = info->user_ptr[0];
 838         u32 port_index;
 839
 840         if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
 841                 return -EINVAL;
 842
 843         port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
 844         return devlink_port_unsplit(devlink, port_index, info->extack);
 845 }
 846
 847 static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
 848                               struct devlink_sb *devlink_sb,
 849                               enum devlink_command cmd, u32 portid,
 850                               u32 seq, int flags)
 851 {
 852         void *hdr;
 853
 854         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 855         if (!hdr)
 856                 return -EMSGSIZE;
 857
 858         if (devlink_nl_put_handle(msg, devlink))
 859                 goto nla_put_failure;
 860         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
 861                 goto nla_put_failure;
 862         if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size))
 863                 goto nla_put_failure;
 864         if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT,
 865                         devlink_sb->ingress_pools_count))
 866                 goto nla_put_failure;
 867         if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT,
 868                         devlink_sb->egress_pools_count))
 869                 goto nla_put_failure;
 870         if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT,
 871                         devlink_sb->ingress_tc_count))
 872                 goto nla_put_failure;
 873         if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT,
 874                         devlink_sb->egress_tc_count))
 875                 goto nla_put_failure;
 876
 877         genlmsg_end(msg, hdr);
 878         return 0;
 879
 880 nla_put_failure:
 881         genlmsg_cancel(msg, hdr);
 882         return -EMSGSIZE;
 883 }
 884
 885 static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb,
 886                                       struct genl_info *info)
 887 {
 888         struct devlink *devlink = info->user_ptr[0];
 889         struct devlink_sb *devlink_sb = info->user_ptr[1];
 890         struct sk_buff *msg;
 891         int err;
 892
 893         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 894         if (!msg)
 895                 return -ENOMEM;
 896
 897         err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
 898                                  DEVLINK_CMD_SB_NEW,
 899                                  info->snd_portid, info->snd_seq, 0);
 900         if (err) {
 901                 nlmsg_free(msg);
 902                 return err;
 903         }
 904
 905         return genlmsg_reply(msg, info);
 906 }
 907
 908 static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
 909                                         struct netlink_callback *cb)
 910 {
 911         struct devlink *devlink;
 912         struct devlink_sb *devlink_sb;
 913         int start = cb->args[0];
 914         int idx = 0;
 915         int err;
 916
 917         mutex_lock(&devlink_mutex);
 918         list_for_each_entry(devlink, &devlink_list, list) {
 919                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 920                         continue;
 921                 mutex_lock(&devlink->lock);
 922                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
 923                         if (idx < start) {
 924                                 idx++;
 925                                 continue;
 926                         }
 927                         err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
 928                                                  DEVLINK_CMD_SB_NEW,
 929                                                  NETLINK_CB(cb->skb).portid,
 930                                                  cb->nlh->nlmsg_seq,
 931                                                  NLM_F_MULTI);
 932                         if (err) {
 933                                 mutex_unlock(&devlink->lock);
 934                                 goto out;
 935                         }
 936                         idx++;
 937                 }
 938                 mutex_unlock(&devlink->lock);
 939         }
 940 out:
 941         mutex_unlock(&devlink_mutex);
 942
 943         cb->args[0] = idx;
 944         return msg->len;
 945 }
 946
 947 static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink,
 948                                    struct devlink_sb *devlink_sb,
 949                                    u16 pool_index, enum devlink_command cmd,
 950                                    u32 portid, u32 seq, int flags)
 951 {
 952         struct devlink_sb_pool_info pool_info;
 953         void *hdr;
 954         int err;
 955
 956         err = devlink->ops->sb_pool_get(devlink, devlink_sb->index,
 957                                         pool_index, &pool_info);
 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_SB_INDEX, devlink_sb->index))
 968                 goto nla_put_failure;
 969         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
 970                 goto nla_put_failure;
 971         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type))
 972                 goto nla_put_failure;
 973         if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size))
 974                 goto nla_put_failure;
 975         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
 976                        pool_info.threshold_type))
 977                 goto nla_put_failure;
 978         if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_CELL_SIZE,
 979                         pool_info.cell_size))
 980                 goto nla_put_failure;
 981
 982         genlmsg_end(msg, hdr);
 983         return 0;
 984
 985 nla_put_failure:
 986         genlmsg_cancel(msg, hdr);
 987         return -EMSGSIZE;
 988 }
 989
 990 static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb,
 991                                            struct genl_info *info)
 992 {
 993         struct devlink *devlink = info->user_ptr[0];
 994         struct devlink_sb *devlink_sb = info->user_ptr[1];
 995         struct sk_buff *msg;
 996         u16 pool_index;
 997         int err;
 998
 999         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1000                                                   &pool_index);
1001         if (err)
1002                 return err;
1003
1004         if (!devlink->ops->sb_pool_get)
1005                 return -EOPNOTSUPP;
1006
1007         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1008         if (!msg)
1009                 return -ENOMEM;
1010
1011         err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index,
1012                                       DEVLINK_CMD_SB_POOL_NEW,
1013                                       info->snd_portid, info->snd_seq, 0);
1014         if (err) {
1015                 nlmsg_free(msg);
1016                 return err;
1017         }
1018
1019         return genlmsg_reply(msg, info);
1020 }
1021
1022 static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1023                                 struct devlink *devlink,
1024                                 struct devlink_sb *devlink_sb,
1025                                 u32 portid, u32 seq)
1026 {
1027         u16 pool_count = devlink_sb_pool_count(devlink_sb);
1028         u16 pool_index;
1029         int err;
1030
1031         for (pool_index = 0; pool_index < pool_count; pool_index++) {
1032                 if (*p_idx < start) {
1033                         (*p_idx)++;
1034                         continue;
1035                 }
1036                 err = devlink_nl_sb_pool_fill(msg, devlink,
1037                                               devlink_sb,
1038                                               pool_index,
1039                                               DEVLINK_CMD_SB_POOL_NEW,
1040                                               portid, seq, NLM_F_MULTI);
1041                 if (err)
1042                         return err;
1043                 (*p_idx)++;
1044         }
1045         return 0;
1046 }
1047
1048 static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg,
1049                                              struct netlink_callback *cb)
1050 {
1051         struct devlink *devlink;
1052         struct devlink_sb *devlink_sb;
1053         int start = cb->args[0];
1054         int idx = 0;
1055         int err = 0;
1056
1057         mutex_lock(&devlink_mutex);
1058         list_for_each_entry(devlink, &devlink_list, list) {
1059                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1060                     !devlink->ops->sb_pool_get)
1061                         continue;
1062                 mutex_lock(&devlink->lock);
1063                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1064                         err = __sb_pool_get_dumpit(msg, start, &idx, devlink,
1065                                                    devlink_sb,
1066                                                    NETLINK_CB(cb->skb).portid,
1067                                                    cb->nlh->nlmsg_seq);
1068                         if (err && err != -EOPNOTSUPP) {
1069                                 mutex_unlock(&devlink->lock);
1070                                 goto out;
1071                         }
1072                 }
1073                 mutex_unlock(&devlink->lock);
1074         }
1075 out:
1076         mutex_unlock(&devlink_mutex);
1077
1078         if (err != -EMSGSIZE)
1079                 return err;
1080
1081         cb->args[0] = idx;
1082         return msg->len;
1083 }
1084
1085 static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
1086                                u16 pool_index, u32 size,
1087                                enum devlink_sb_threshold_type threshold_type,
1088                                struct netlink_ext_ack *extack)
1089
1090 {
1091         const struct devlink_ops *ops = devlink->ops;
1092
1093         if (ops->sb_pool_set)
1094                 return ops->sb_pool_set(devlink, sb_index, pool_index,
1095                                         size, threshold_type, extack);
1096         return -EOPNOTSUPP;
1097 }
1098
1099 static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb,
1100                                            struct genl_info *info)
1101 {
1102         struct devlink *devlink = info->user_ptr[0];
1103         struct devlink_sb *devlink_sb = info->user_ptr[1];
1104         enum devlink_sb_threshold_type threshold_type;
1105         u16 pool_index;
1106         u32 size;
1107         int err;
1108
1109         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1110                                                   &pool_index);
1111         if (err)
1112                 return err;
1113
1114         err = devlink_sb_th_type_get_from_info(info, &threshold_type);
1115         if (err)
1116                 return err;
1117
1118         if (!info->attrs[DEVLINK_ATTR_SB_POOL_SIZE])
1119                 return -EINVAL;
1120
1121         size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]);
1122         return devlink_sb_pool_set(devlink, devlink_sb->index,
1123                                    pool_index, size, threshold_type,
1124                                    info->extack);
1125 }
1126
1127 static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
1128                                         struct devlink *devlink,
1129                                         struct devlink_port *devlink_port,
1130                                         struct devlink_sb *devlink_sb,
1131                                         u16 pool_index,
1132                                         enum devlink_command cmd,
1133                                         u32 portid, u32 seq, int flags)
1134 {
1135         const struct devlink_ops *ops = devlink->ops;
1136         u32 threshold;
1137         void *hdr;
1138         int err;
1139
1140         err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
1141                                     pool_index, &threshold);
1142         if (err)
1143                 return err;
1144
1145         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1146         if (!hdr)
1147                 return -EMSGSIZE;
1148
1149         if (devlink_nl_put_handle(msg, devlink))
1150                 goto nla_put_failure;
1151         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1152                 goto nla_put_failure;
1153         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1154                 goto nla_put_failure;
1155         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1156                 goto nla_put_failure;
1157         if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1158                 goto nla_put_failure;
1159
1160         if (ops->sb_occ_port_pool_get) {
1161                 u32 cur;
1162                 u32 max;
1163
1164                 err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
1165                                                 pool_index, &cur, &max);
1166                 if (err && err != -EOPNOTSUPP)
1167                         return err;
1168                 if (!err) {
1169                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1170                                 goto nla_put_failure;
1171                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1172                                 goto nla_put_failure;
1173                 }
1174         }
1175
1176         genlmsg_end(msg, hdr);
1177         return 0;
1178
1179 nla_put_failure:
1180         genlmsg_cancel(msg, hdr);
1181         return -EMSGSIZE;
1182 }
1183
1184 static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
1185                                                 struct genl_info *info)
1186 {
1187         struct devlink_port *devlink_port = info->user_ptr[0];
1188         struct devlink *devlink = devlink_port->devlink;
1189         struct devlink_sb *devlink_sb = info->user_ptr[1];
1190         struct sk_buff *msg;
1191         u16 pool_index;
1192         int err;
1193
1194         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1195                                                   &pool_index);
1196         if (err)
1197                 return err;
1198
1199         if (!devlink->ops->sb_port_pool_get)
1200                 return -EOPNOTSUPP;
1201
1202         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1203         if (!msg)
1204                 return -ENOMEM;
1205
1206         err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port,
1207                                            devlink_sb, pool_index,
1208                                            DEVLINK_CMD_SB_PORT_POOL_NEW,
1209                                            info->snd_portid, info->snd_seq, 0);
1210         if (err) {
1211                 nlmsg_free(msg);
1212                 return err;
1213         }
1214
1215         return genlmsg_reply(msg, info);
1216 }
1217
1218 static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1219                                      struct devlink *devlink,
1220                                      struct devlink_sb *devlink_sb,
1221                                      u32 portid, u32 seq)
1222 {
1223         struct devlink_port *devlink_port;
1224         u16 pool_count = devlink_sb_pool_count(devlink_sb);
1225         u16 pool_index;
1226         int err;
1227
1228         list_for_each_entry(devlink_port, &devlink->port_list, list) {
1229                 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1230                         if (*p_idx < start) {
1231                                 (*p_idx)++;
1232                                 continue;
1233                         }
1234                         err = devlink_nl_sb_port_pool_fill(msg, devlink,
1235                                                            devlink_port,
1236                                                            devlink_sb,
1237                                                            pool_index,
1238                                                            DEVLINK_CMD_SB_PORT_POOL_NEW,
1239                                                            portid, seq,
1240                                                            NLM_F_MULTI);
1241                         if (err)
1242                                 return err;
1243                         (*p_idx)++;
1244                 }
1245         }
1246         return 0;
1247 }
1248
1249 static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg,
1250                                                   struct netlink_callback *cb)
1251 {
1252         struct devlink *devlink;
1253         struct devlink_sb *devlink_sb;
1254         int start = cb->args[0];
1255         int idx = 0;
1256         int err = 0;
1257
1258         mutex_lock(&devlink_mutex);
1259         list_for_each_entry(devlink, &devlink_list, list) {
1260                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1261                     !devlink->ops->sb_port_pool_get)
1262                         continue;
1263                 mutex_lock(&devlink->lock);
1264                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1265                         err = __sb_port_pool_get_dumpit(msg, start, &idx,
1266                                                         devlink, devlink_sb,
1267                                                         NETLINK_CB(cb->skb).portid,
1268                                                         cb->nlh->nlmsg_seq);
1269                         if (err && err != -EOPNOTSUPP) {
1270                                 mutex_unlock(&devlink->lock);
1271                                 goto out;
1272                         }
1273                 }
1274                 mutex_unlock(&devlink->lock);
1275         }
1276 out:
1277         mutex_unlock(&devlink_mutex);
1278
1279         if (err != -EMSGSIZE)
1280                 return err;
1281
1282         cb->args[0] = idx;
1283         return msg->len;
1284 }
1285
1286 static int devlink_sb_port_pool_set(struct devlink_port *devlink_port,
1287                                     unsigned int sb_index, u16 pool_index,
1288                                     u32 threshold,
1289                                     struct netlink_ext_ack *extack)
1290
1291 {
1292         const struct devlink_ops *ops = devlink_port->devlink->ops;
1293
1294         if (ops->sb_port_pool_set)
1295                 return ops->sb_port_pool_set(devlink_port, sb_index,
1296                                              pool_index, threshold, extack);
1297         return -EOPNOTSUPP;
1298 }
1299
1300 static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb,
1301                                                 struct genl_info *info)
1302 {
1303         struct devlink_port *devlink_port = info->user_ptr[0];
1304         struct devlink_sb *devlink_sb = info->user_ptr[1];
1305         u16 pool_index;
1306         u32 threshold;
1307         int err;
1308
1309         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1310                                                   &pool_index);
1311         if (err)
1312                 return err;
1313
1314         if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1315                 return -EINVAL;
1316
1317         threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1318         return devlink_sb_port_pool_set(devlink_port, devlink_sb->index,
1319                                         pool_index, threshold, info->extack);
1320 }
1321
1322 static int
1323 devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
1324                                 struct devlink_port *devlink_port,
1325                                 struct devlink_sb *devlink_sb, u16 tc_index,
1326                                 enum devlink_sb_pool_type pool_type,
1327                                 enum devlink_command cmd,
1328                                 u32 portid, u32 seq, int flags)
1329 {
1330         const struct devlink_ops *ops = devlink->ops;
1331         u16 pool_index;
1332         u32 threshold;
1333         void *hdr;
1334         int err;
1335
1336         err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
1337                                        tc_index, pool_type,
1338                                        &pool_index, &threshold);
1339         if (err)
1340                 return err;
1341
1342         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1343         if (!hdr)
1344                 return -EMSGSIZE;
1345
1346         if (devlink_nl_put_handle(msg, devlink))
1347                 goto nla_put_failure;
1348         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1349                 goto nla_put_failure;
1350         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1351                 goto nla_put_failure;
1352         if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index))
1353                 goto nla_put_failure;
1354         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type))
1355                 goto nla_put_failure;
1356         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1357                 goto nla_put_failure;
1358         if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1359                 goto nla_put_failure;
1360
1361         if (ops->sb_occ_tc_port_bind_get) {
1362                 u32 cur;
1363                 u32 max;
1364
1365                 err = ops->sb_occ_tc_port_bind_get(devlink_port,
1366                                                    devlink_sb->index,
1367                                                    tc_index, pool_type,
1368                                                    &cur, &max);
1369                 if (err && err != -EOPNOTSUPP)
1370                         return err;
1371                 if (!err) {
1372                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1373                                 goto nla_put_failure;
1374                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1375                                 goto nla_put_failure;
1376                 }
1377         }
1378
1379         genlmsg_end(msg, hdr);
1380         return 0;
1381
1382 nla_put_failure:
1383         genlmsg_cancel(msg, hdr);
1384         return -EMSGSIZE;
1385 }
1386
1387 static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
1388                                                    struct genl_info *info)
1389 {
1390         struct devlink_port *devlink_port = info->user_ptr[0];
1391         struct devlink *devlink = devlink_port->devlink;
1392         struct devlink_sb *devlink_sb = info->user_ptr[1];
1393         struct sk_buff *msg;
1394         enum devlink_sb_pool_type pool_type;
1395         u16 tc_index;
1396         int err;
1397
1398         err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1399         if (err)
1400                 return err;
1401
1402         err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1403                                                 pool_type, &tc_index);
1404         if (err)
1405                 return err;
1406
1407         if (!devlink->ops->sb_tc_pool_bind_get)
1408                 return -EOPNOTSUPP;
1409
1410         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1411         if (!msg)
1412                 return -ENOMEM;
1413
1414         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port,
1415                                               devlink_sb, tc_index, pool_type,
1416                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1417                                               info->snd_portid,
1418                                               info->snd_seq, 0);
1419         if (err) {
1420                 nlmsg_free(msg);
1421                 return err;
1422         }
1423
1424         return genlmsg_reply(msg, info);
1425 }
1426
1427 static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1428                                         int start, int *p_idx,
1429                                         struct devlink *devlink,
1430                                         struct devlink_sb *devlink_sb,
1431                                         u32 portid, u32 seq)
1432 {
1433         struct devlink_port *devlink_port;
1434         u16 tc_index;
1435         int err;
1436
1437         list_for_each_entry(devlink_port, &devlink->port_list, list) {
1438                 for (tc_index = 0;
1439                      tc_index < devlink_sb->ingress_tc_count; tc_index++) {
1440                         if (*p_idx < start) {
1441                                 (*p_idx)++;
1442                                 continue;
1443                         }
1444                         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1445                                                               devlink_port,
1446                                                               devlink_sb,
1447                                                               tc_index,
1448                                                               DEVLINK_SB_POOL_TYPE_INGRESS,
1449                                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1450                                                               portid, seq,
1451                                                               NLM_F_MULTI);
1452                         if (err)
1453                                 return err;
1454                         (*p_idx)++;
1455                 }
1456                 for (tc_index = 0;
1457                      tc_index < devlink_sb->egress_tc_count; tc_index++) {
1458                         if (*p_idx < start) {
1459                                 (*p_idx)++;
1460                                 continue;
1461                         }
1462                         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1463                                                               devlink_port,
1464                                                               devlink_sb,
1465                                                               tc_index,
1466                                                               DEVLINK_SB_POOL_TYPE_EGRESS,
1467                                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1468                                                               portid, seq,
1469                                                               NLM_F_MULTI);
1470                         if (err)
1471                                 return err;
1472                         (*p_idx)++;
1473                 }
1474         }
1475         return 0;
1476 }
1477
1478 static int
1479 devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1480                                           struct netlink_callback *cb)
1481 {
1482         struct devlink *devlink;
1483         struct devlink_sb *devlink_sb;
1484         int start = cb->args[0];
1485         int idx = 0;
1486         int err = 0;
1487
1488         mutex_lock(&devlink_mutex);
1489         list_for_each_entry(devlink, &devlink_list, list) {
1490                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1491                     !devlink->ops->sb_tc_pool_bind_get)
1492                         continue;
1493
1494                 mutex_lock(&devlink->lock);
1495                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1496                         err = __sb_tc_pool_bind_get_dumpit(msg, start, &idx,
1497                                                            devlink,
1498                                                            devlink_sb,
1499                                                            NETLINK_CB(cb->skb).portid,
1500                                                            cb->nlh->nlmsg_seq);
1501                         if (err && err != -EOPNOTSUPP) {
1502                                 mutex_unlock(&devlink->lock);
1503                                 goto out;
1504                         }
1505                 }
1506                 mutex_unlock(&devlink->lock);
1507         }
1508 out:
1509         mutex_unlock(&devlink_mutex);
1510
1511         if (err != -EMSGSIZE)
1512                 return err;
1513
1514         cb->args[0] = idx;
1515         return msg->len;
1516 }
1517
1518 static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
1519                                        unsigned int sb_index, u16 tc_index,
1520                                        enum devlink_sb_pool_type pool_type,
1521                                        u16 pool_index, u32 threshold,
1522                                        struct netlink_ext_ack *extack)
1523
1524 {
1525         const struct devlink_ops *ops = devlink_port->devlink->ops;
1526
1527         if (ops->sb_tc_pool_bind_set)
1528                 return ops->sb_tc_pool_bind_set(devlink_port, sb_index,
1529                                                 tc_index, pool_type,
1530                                                 pool_index, threshold, extack);
1531         return -EOPNOTSUPP;
1532 }
1533
1534 static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
1535                                                    struct genl_info *info)
1536 {
1537         struct devlink_port *devlink_port = info->user_ptr[0];
1538         struct devlink_sb *devlink_sb = info->user_ptr[1];
1539         enum devlink_sb_pool_type pool_type;
1540         u16 tc_index;
1541         u16 pool_index;
1542         u32 threshold;
1543         int err;
1544
1545         err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1546         if (err)
1547                 return err;
1548
1549         err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1550                                                 pool_type, &tc_index);
1551         if (err)
1552                 return err;
1553
1554         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1555                                                   &pool_index);
1556         if (err)
1557                 return err;
1558
1559         if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1560                 return -EINVAL;
1561
1562         threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1563         return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index,
1564                                            tc_index, pool_type,
1565                                            pool_index, threshold, info->extack);
1566 }
1567
1568 static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
1569                                                struct genl_info *info)
1570 {
1571         struct devlink *devlink = info->user_ptr[0];
1572         struct devlink_sb *devlink_sb = info->user_ptr[1];
1573         const struct devlink_ops *ops = devlink->ops;
1574
1575         if (ops->sb_occ_snapshot)
1576                 return ops->sb_occ_snapshot(devlink, devlink_sb->index);
1577         return -EOPNOTSUPP;
1578 }
1579
1580 static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
1581                                                 struct genl_info *info)
1582 {
1583         struct devlink *devlink = info->user_ptr[0];
1584         struct devlink_sb *devlink_sb = info->user_ptr[1];
1585         const struct devlink_ops *ops = devlink->ops;
1586
1587         if (ops->sb_occ_max_clear)
1588                 return ops->sb_occ_max_clear(devlink, devlink_sb->index);
1589         return -EOPNOTSUPP;
1590 }
1591
1592 static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
1593                                    enum devlink_command cmd, u32 portid,
1594                                    u32 seq, int flags)
1595 {
1596         const struct devlink_ops *ops = devlink->ops;
1597         enum devlink_eswitch_encap_mode encap_mode;
1598         u8 inline_mode;
1599         void *hdr;
1600         int err = 0;
1601         u16 mode;
1602
1603         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1604         if (!hdr)
1605                 return -EMSGSIZE;
1606
1607         err = devlink_nl_put_handle(msg, devlink);
1608         if (err)
1609                 goto nla_put_failure;
1610
1611         if (ops->eswitch_mode_get) {
1612                 err = ops->eswitch_mode_get(devlink, &mode);
1613                 if (err)
1614                         goto nla_put_failure;
1615                 err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode);
1616                 if (err)
1617                         goto nla_put_failure;
1618         }
1619
1620         if (ops->eswitch_inline_mode_get) {
1621                 err = ops->eswitch_inline_mode_get(devlink, &inline_mode);
1622                 if (err)
1623                         goto nla_put_failure;
1624                 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE,
1625                                  inline_mode);
1626                 if (err)
1627                         goto nla_put_failure;
1628         }
1629
1630         if (ops->eswitch_encap_mode_get) {
1631                 err = ops->eswitch_encap_mode_get(devlink, &encap_mode);
1632                 if (err)
1633                         goto nla_put_failure;
1634                 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_ENCAP_MODE, encap_mode);
1635                 if (err)
1636                         goto nla_put_failure;
1637         }
1638
1639         genlmsg_end(msg, hdr);
1640         return 0;
1641
1642 nla_put_failure:
1643         genlmsg_cancel(msg, hdr);
1644         return err;
1645 }
1646
1647 static int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb,
1648                                            struct genl_info *info)
1649 {
1650         struct devlink *devlink = info->user_ptr[0];
1651         struct sk_buff *msg;
1652         int err;
1653
1654         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1655         if (!msg)
1656                 return -ENOMEM;
1657
1658         err = devlink_nl_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_GET,
1659                                       info->snd_portid, info->snd_seq, 0);
1660
1661         if (err) {
1662                 nlmsg_free(msg);
1663                 return err;
1664         }
1665
1666         return genlmsg_reply(msg, info);
1667 }
1668
1669 static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb,
1670                                            struct genl_info *info)
1671 {
1672         struct devlink *devlink = info->user_ptr[0];
1673         const struct devlink_ops *ops = devlink->ops;
1674         enum devlink_eswitch_encap_mode encap_mode;
1675         u8 inline_mode;
1676         int err = 0;
1677         u16 mode;
1678
1679         if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) {
1680                 if (!ops->eswitch_mode_set)
1681                         return -EOPNOTSUPP;
1682                 mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
1683                 err = ops->eswitch_mode_set(devlink, mode, info->extack);
1684                 if (err)
1685                         return err;
1686         }
1687
1688         if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) {
1689                 if (!ops->eswitch_inline_mode_set)
1690                         return -EOPNOTSUPP;
1691                 inline_mode = nla_get_u8(
1692                                 info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]);
1693                 err = ops->eswitch_inline_mode_set(devlink, inline_mode,
1694                                                    info->extack);
1695                 if (err)
1696                         return err;
1697         }
1698
1699         if (info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]) {
1700                 if (!ops->eswitch_encap_mode_set)
1701                         return -EOPNOTSUPP;
1702                 encap_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]);
1703                 err = ops->eswitch_encap_mode_set(devlink, encap_mode,
1704                                                   info->extack);
1705                 if (err)
1706                         return err;
1707         }
1708
1709         return 0;
1710 }
1711
1712 int devlink_dpipe_match_put(struct sk_buff *skb,
1713                             struct devlink_dpipe_match *match)
1714 {
1715         struct devlink_dpipe_header *header = match->header;
1716         struct devlink_dpipe_field *field = &header->fields[match->field_id];
1717         struct nlattr *match_attr;
1718
1719         match_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_MATCH);
1720         if (!match_attr)
1721                 return -EMSGSIZE;
1722
1723         if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) ||
1724             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) ||
1725             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1726             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1727             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1728                 goto nla_put_failure;
1729
1730         nla_nest_end(skb, match_attr);
1731         return 0;
1732
1733 nla_put_failure:
1734         nla_nest_cancel(skb, match_attr);
1735         return -EMSGSIZE;
1736 }
1737 EXPORT_SYMBOL_GPL(devlink_dpipe_match_put);
1738
1739 static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table,
1740                                      struct sk_buff *skb)
1741 {
1742         struct nlattr *matches_attr;
1743
1744         matches_attr = nla_nest_start_noflag(skb,
1745                                              DEVLINK_ATTR_DPIPE_TABLE_MATCHES);
1746         if (!matches_attr)
1747                 return -EMSGSIZE;
1748
1749         if (table->table_ops->matches_dump(table->priv, skb))
1750                 goto nla_put_failure;
1751
1752         nla_nest_end(skb, matches_attr);
1753         return 0;
1754
1755 nla_put_failure:
1756         nla_nest_cancel(skb, matches_attr);
1757         return -EMSGSIZE;
1758 }
1759
1760 int devlink_dpipe_action_put(struct sk_buff *skb,
1761                              struct devlink_dpipe_action *action)
1762 {
1763         struct devlink_dpipe_header *header = action->header;
1764         struct devlink_dpipe_field *field = &header->fields[action->field_id];
1765         struct nlattr *action_attr;
1766
1767         action_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ACTION);
1768         if (!action_attr)
1769                 return -EMSGSIZE;
1770
1771         if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) ||
1772             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) ||
1773             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1774             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1775             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1776                 goto nla_put_failure;
1777
1778         nla_nest_end(skb, action_attr);
1779         return 0;
1780
1781 nla_put_failure:
1782         nla_nest_cancel(skb, action_attr);
1783         return -EMSGSIZE;
1784 }
1785 EXPORT_SYMBOL_GPL(devlink_dpipe_action_put);
1786
1787 static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table,
1788                                      struct sk_buff *skb)
1789 {
1790         struct nlattr *actions_attr;
1791
1792         actions_attr = nla_nest_start_noflag(skb,
1793                                              DEVLINK_ATTR_DPIPE_TABLE_ACTIONS);
1794         if (!actions_attr)
1795                 return -EMSGSIZE;
1796
1797         if (table->table_ops->actions_dump(table->priv, skb))
1798                 goto nla_put_failure;
1799
1800         nla_nest_end(skb, actions_attr);
1801         return 0;
1802
1803 nla_put_failure:
1804         nla_nest_cancel(skb, actions_attr);
1805         return -EMSGSIZE;
1806 }
1807
1808 static int devlink_dpipe_table_put(struct sk_buff *skb,
1809                                    struct devlink_dpipe_table *table)
1810 {
1811         struct nlattr *table_attr;
1812         u64 table_size;
1813
1814         table_size = table->table_ops->size_get(table->priv);
1815         table_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLE);
1816         if (!table_attr)
1817                 return -EMSGSIZE;
1818
1819         if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) ||
1820             nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table_size,
1821                               DEVLINK_ATTR_PAD))
1822                 goto nla_put_failure;
1823         if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED,
1824                        table->counters_enabled))
1825                 goto nla_put_failure;
1826
1827         if (table->resource_valid) {
1828                 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,
1829                                       table->resource_id, DEVLINK_ATTR_PAD) ||
1830                     nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS,
1831                                       table->resource_units, DEVLINK_ATTR_PAD))
1832                         goto nla_put_failure;
1833         }
1834         if (devlink_dpipe_matches_put(table, skb))
1835                 goto nla_put_failure;
1836
1837         if (devlink_dpipe_actions_put(table, skb))
1838                 goto nla_put_failure;
1839
1840         nla_nest_end(skb, table_attr);
1841         return 0;
1842
1843 nla_put_failure:
1844         nla_nest_cancel(skb, table_attr);
1845         return -EMSGSIZE;
1846 }
1847
1848 static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb,
1849                                             struct genl_info *info)
1850 {
1851         int err;
1852
1853         if (*pskb) {
1854                 err = genlmsg_reply(*pskb, info);
1855                 if (err)
1856                         return err;
1857         }
1858         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
1859         if (!*pskb)
1860                 return -ENOMEM;
1861         return 0;
1862 }
1863
1864 static int devlink_dpipe_tables_fill(struct genl_info *info,
1865                                      enum devlink_command cmd, int flags,
1866                                      struct list_head *dpipe_tables,
1867                                      const char *table_name)
1868 {
1869         struct devlink *devlink = info->user_ptr[0];
1870         struct devlink_dpipe_table *table;
1871         struct nlattr *tables_attr;
1872         struct sk_buff *skb = NULL;
1873         struct nlmsghdr *nlh;
1874         bool incomplete;
1875         void *hdr;
1876         int i;
1877         int err;
1878
1879         table = list_first_entry(dpipe_tables,
1880                                  struct devlink_dpipe_table, list);
1881 start_again:
1882         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1883         if (err)
1884                 return err;
1885
1886         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
1887                           &devlink_nl_family, NLM_F_MULTI, cmd);
1888         if (!hdr) {
1889                 nlmsg_free(skb);
1890                 return -EMSGSIZE;
1891         }
1892
1893         if (devlink_nl_put_handle(skb, devlink))
1894                 goto nla_put_failure;
1895         tables_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLES);
1896         if (!tables_attr)
1897                 goto nla_put_failure;
1898
1899         i = 0;
1900         incomplete = false;
1901         list_for_each_entry_from(table, dpipe_tables, list) {
1902                 if (!table_name) {
1903                         err = devlink_dpipe_table_put(skb, table);
1904                         if (err) {
1905                                 if (!i)
1906                                         goto err_table_put;
1907                                 incomplete = true;
1908                                 break;
1909                         }
1910                 } else {
1911                         if (!strcmp(table->name, table_name)) {
1912                                 err = devlink_dpipe_table_put(skb, table);
1913                                 if (err)
1914                                         break;
1915                         }
1916                 }
1917                 i++;
1918         }
1919
1920         nla_nest_end(skb, tables_attr);
1921         genlmsg_end(skb, hdr);
1922         if (incomplete)
1923                 goto start_again;
1924
1925 send_done:
1926         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
1927                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
1928         if (!nlh) {
1929                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1930                 if (err)
1931                         return err;
1932                 goto send_done;
1933         }
1934
1935         return genlmsg_reply(skb, info);
1936
1937 nla_put_failure:
1938         err = -EMSGSIZE;
1939 err_table_put:
1940         nlmsg_free(skb);
1941         return err;
1942 }
1943
1944 static int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb,
1945                                           struct genl_info *info)
1946 {
1947         struct devlink *devlink = info->user_ptr[0];
1948         const char *table_name =  NULL;
1949
1950         if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
1951                 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
1952
1953         return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0,
1954                                          &devlink->dpipe_table_list,
1955                                          table_name);
1956 }
1957
1958 static int devlink_dpipe_value_put(struct sk_buff *skb,
1959                                    struct devlink_dpipe_value *value)
1960 {
1961         if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE,
1962                     value->value_size, value->value))
1963                 return -EMSGSIZE;
1964         if (value->mask)
1965                 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK,
1966                             value->value_size, value->mask))
1967                         return -EMSGSIZE;
1968         if (value->mapping_valid)
1969                 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING,
1970                                 value->mapping_value))
1971                         return -EMSGSIZE;
1972         return 0;
1973 }
1974
1975 static int devlink_dpipe_action_value_put(struct sk_buff *skb,
1976                                           struct devlink_dpipe_value *value)
1977 {
1978         if (!value->action)
1979                 return -EINVAL;
1980         if (devlink_dpipe_action_put(skb, value->action))
1981                 return -EMSGSIZE;
1982         if (devlink_dpipe_value_put(skb, value))
1983                 return -EMSGSIZE;
1984         return 0;
1985 }
1986
1987 static int devlink_dpipe_action_values_put(struct sk_buff *skb,
1988                                            struct devlink_dpipe_value *values,
1989                                            unsigned int values_count)
1990 {
1991         struct nlattr *action_attr;
1992         int i;
1993         int err;
1994
1995         for (i = 0; i < values_count; i++) {
1996                 action_attr = nla_nest_start_noflag(skb,
1997                                                     DEVLINK_ATTR_DPIPE_ACTION_VALUE);
1998                 if (!action_attr)
1999                         return -EMSGSIZE;
2000                 err = devlink_dpipe_action_value_put(skb, &values[i]);
2001                 if (err)
2002                         goto err_action_value_put;
2003                 nla_nest_end(skb, action_attr);
2004         }
2005         return 0;
2006
2007 err_action_value_put:
2008         nla_nest_cancel(skb, action_attr);
2009         return err;
2010 }
2011
2012 static int devlink_dpipe_match_value_put(struct sk_buff *skb,
2013                                          struct devlink_dpipe_value *value)
2014 {
2015         if (!value->match)
2016                 return -EINVAL;
2017         if (devlink_dpipe_match_put(skb, value->match))
2018                 return -EMSGSIZE;
2019         if (devlink_dpipe_value_put(skb, value))
2020                 return -EMSGSIZE;
2021         return 0;
2022 }
2023
2024 static int devlink_dpipe_match_values_put(struct sk_buff *skb,
2025                                           struct devlink_dpipe_value *values,
2026                                           unsigned int values_count)
2027 {
2028         struct nlattr *match_attr;
2029         int i;
2030         int err;
2031
2032         for (i = 0; i < values_count; i++) {
2033                 match_attr = nla_nest_start_noflag(skb,
2034                                                    DEVLINK_ATTR_DPIPE_MATCH_VALUE);
2035                 if (!match_attr)
2036                         return -EMSGSIZE;
2037                 err = devlink_dpipe_match_value_put(skb, &values[i]);
2038                 if (err)
2039                         goto err_match_value_put;
2040                 nla_nest_end(skb, match_attr);
2041         }
2042         return 0;
2043
2044 err_match_value_put:
2045         nla_nest_cancel(skb, match_attr);
2046         return err;
2047 }
2048
2049 static int devlink_dpipe_entry_put(struct sk_buff *skb,
2050                                    struct devlink_dpipe_entry *entry)
2051 {
2052         struct nlattr *entry_attr, *matches_attr, *actions_attr;
2053         int err;
2054
2055         entry_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ENTRY);
2056         if (!entry_attr)
2057                 return  -EMSGSIZE;
2058
2059         if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index,
2060                               DEVLINK_ATTR_PAD))
2061                 goto nla_put_failure;
2062         if (entry->counter_valid)
2063                 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER,
2064                                       entry->counter, DEVLINK_ATTR_PAD))
2065                         goto nla_put_failure;
2066
2067         matches_attr = nla_nest_start_noflag(skb,
2068                                              DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES);
2069         if (!matches_attr)
2070                 goto nla_put_failure;
2071
2072         err = devlink_dpipe_match_values_put(skb, entry->match_values,
2073                                              entry->match_values_count);
2074         if (err) {
2075                 nla_nest_cancel(skb, matches_attr);
2076                 goto err_match_values_put;
2077         }
2078         nla_nest_end(skb, matches_attr);
2079
2080         actions_attr = nla_nest_start_noflag(skb,
2081                                              DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES);
2082         if (!actions_attr)
2083                 goto nla_put_failure;
2084
2085         err = devlink_dpipe_action_values_put(skb, entry->action_values,
2086                                               entry->action_values_count);
2087         if (err) {
2088                 nla_nest_cancel(skb, actions_attr);
2089                 goto err_action_values_put;
2090         }
2091         nla_nest_end(skb, actions_attr);
2092
2093         nla_nest_end(skb, entry_attr);
2094         return 0;
2095
2096 nla_put_failure:
2097         err = -EMSGSIZE;
2098 err_match_values_put:
2099 err_action_values_put:
2100         nla_nest_cancel(skb, entry_attr);
2101         return err;
2102 }
2103
2104 static struct devlink_dpipe_table *
2105 devlink_dpipe_table_find(struct list_head *dpipe_tables,
2106                          const char *table_name)
2107 {
2108         struct devlink_dpipe_table *table;
2109
2110         list_for_each_entry_rcu(table, dpipe_tables, list) {
2111                 if (!strcmp(table->name, table_name))
2112                         return table;
2113         }
2114         return NULL;
2115 }
2116
2117 int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
2118 {
2119         struct devlink *devlink;
2120         int err;
2121
2122         err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb,
2123                                                dump_ctx->info);
2124         if (err)
2125                 return err;
2126
2127         dump_ctx->hdr = genlmsg_put(dump_ctx->skb,
2128                                     dump_ctx->info->snd_portid,
2129                                     dump_ctx->info->snd_seq,
2130                                     &devlink_nl_family, NLM_F_MULTI,
2131                                     dump_ctx->cmd);
2132         if (!dump_ctx->hdr)
2133                 goto nla_put_failure;
2134
2135         devlink = dump_ctx->info->user_ptr[0];
2136         if (devlink_nl_put_handle(dump_ctx->skb, devlink))
2137                 goto nla_put_failure;
2138         dump_ctx->nest = nla_nest_start_noflag(dump_ctx->skb,
2139                                                DEVLINK_ATTR_DPIPE_ENTRIES);
2140         if (!dump_ctx->nest)
2141                 goto nla_put_failure;
2142         return 0;
2143
2144 nla_put_failure:
2145         nlmsg_free(dump_ctx->skb);
2146         return -EMSGSIZE;
2147 }
2148 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare);
2149
2150 int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
2151                                    struct devlink_dpipe_entry *entry)
2152 {
2153         return devlink_dpipe_entry_put(dump_ctx->skb, entry);
2154 }
2155 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append);
2156
2157 int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
2158 {
2159         nla_nest_end(dump_ctx->skb, dump_ctx->nest);
2160         genlmsg_end(dump_ctx->skb, dump_ctx->hdr);
2161         return 0;
2162 }
2163 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close);
2164
2165 void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry)
2166
2167 {
2168         unsigned int value_count, value_index;
2169         struct devlink_dpipe_value *value;
2170
2171         value = entry->action_values;
2172         value_count = entry->action_values_count;
2173         for (value_index = 0; value_index < value_count; value_index++) {
2174                 kfree(value[value_index].value);
2175                 kfree(value[value_index].mask);
2176         }
2177
2178         value = entry->match_values;
2179         value_count = entry->match_values_count;
2180         for (value_index = 0; value_index < value_count; value_index++) {
2181                 kfree(value[value_index].value);
2182                 kfree(value[value_index].mask);
2183         }
2184 }
2185 EXPORT_SYMBOL(devlink_dpipe_entry_clear);
2186
2187 static int devlink_dpipe_entries_fill(struct genl_info *info,
2188                                       enum devlink_command cmd, int flags,
2189                                       struct devlink_dpipe_table *table)
2190 {
2191         struct devlink_dpipe_dump_ctx dump_ctx;
2192         struct nlmsghdr *nlh;
2193         int err;
2194
2195         dump_ctx.skb = NULL;
2196         dump_ctx.cmd = cmd;
2197         dump_ctx.info = info;
2198
2199         err = table->table_ops->entries_dump(table->priv,
2200                                              table->counters_enabled,
2201                                              &dump_ctx);
2202         if (err)
2203                 return err;
2204
2205 send_done:
2206         nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq,
2207                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2208         if (!nlh) {
2209                 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info);
2210                 if (err)
2211                         return err;
2212                 goto send_done;
2213         }
2214         return genlmsg_reply(dump_ctx.skb, info);
2215 }
2216
2217 static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
2218                                             struct genl_info *info)
2219 {
2220         struct devlink *devlink = info->user_ptr[0];
2221         struct devlink_dpipe_table *table;
2222         const char *table_name;
2223
2224         if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
2225                 return -EINVAL;
2226
2227         table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2228         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2229                                          table_name);
2230         if (!table)
2231                 return -EINVAL;
2232
2233         if (!table->table_ops->entries_dump)
2234                 return -EINVAL;
2235
2236         return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET,
2237                                           0, table);
2238 }
2239
2240 static int devlink_dpipe_fields_put(struct sk_buff *skb,
2241                                     const struct devlink_dpipe_header *header)
2242 {
2243         struct devlink_dpipe_field *field;
2244         struct nlattr *field_attr;
2245         int i;
2246
2247         for (i = 0; i < header->fields_count; i++) {
2248                 field = &header->fields[i];
2249                 field_attr = nla_nest_start_noflag(skb,
2250                                                    DEVLINK_ATTR_DPIPE_FIELD);
2251                 if (!field_attr)
2252                         return -EMSGSIZE;
2253                 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) ||
2254                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2255                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) ||
2256                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type))
2257                         goto nla_put_failure;
2258                 nla_nest_end(skb, field_attr);
2259         }
2260         return 0;
2261
2262 nla_put_failure:
2263         nla_nest_cancel(skb, field_attr);
2264         return -EMSGSIZE;
2265 }
2266
2267 static int devlink_dpipe_header_put(struct sk_buff *skb,
2268                                     struct devlink_dpipe_header *header)
2269 {
2270         struct nlattr *fields_attr, *header_attr;
2271         int err;
2272
2273         header_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADER);
2274         if (!header_attr)
2275                 return -EMSGSIZE;
2276
2277         if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) ||
2278             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2279             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2280                 goto nla_put_failure;
2281
2282         fields_attr = nla_nest_start_noflag(skb,
2283                                             DEVLINK_ATTR_DPIPE_HEADER_FIELDS);
2284         if (!fields_attr)
2285                 goto nla_put_failure;
2286
2287         err = devlink_dpipe_fields_put(skb, header);
2288         if (err) {
2289                 nla_nest_cancel(skb, fields_attr);
2290                 goto nla_put_failure;
2291         }
2292         nla_nest_end(skb, fields_attr);
2293         nla_nest_end(skb, header_attr);
2294         return 0;
2295
2296 nla_put_failure:
2297         err = -EMSGSIZE;
2298         nla_nest_cancel(skb, header_attr);
2299         return err;
2300 }
2301
2302 static int devlink_dpipe_headers_fill(struct genl_info *info,
2303                                       enum devlink_command cmd, int flags,
2304                                       struct devlink_dpipe_headers *
2305                                       dpipe_headers)
2306 {
2307         struct devlink *devlink = info->user_ptr[0];
2308         struct nlattr *headers_attr;
2309         struct sk_buff *skb = NULL;
2310         struct nlmsghdr *nlh;
2311         void *hdr;
2312         int i, j;
2313         int err;
2314
2315         i = 0;
2316 start_again:
2317         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2318         if (err)
2319                 return err;
2320
2321         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2322                           &devlink_nl_family, NLM_F_MULTI, cmd);
2323         if (!hdr) {
2324                 nlmsg_free(skb);
2325                 return -EMSGSIZE;
2326         }
2327
2328         if (devlink_nl_put_handle(skb, devlink))
2329                 goto nla_put_failure;
2330         headers_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADERS);
2331         if (!headers_attr)
2332                 goto nla_put_failure;
2333
2334         j = 0;
2335         for (; i < dpipe_headers->headers_count; i++) {
2336                 err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]);
2337                 if (err) {
2338                         if (!j)
2339                                 goto err_table_put;
2340                         break;
2341                 }
2342                 j++;
2343         }
2344         nla_nest_end(skb, headers_attr);
2345         genlmsg_end(skb, hdr);
2346         if (i != dpipe_headers->headers_count)
2347                 goto start_again;
2348
2349 send_done:
2350         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2351                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2352         if (!nlh) {
2353                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2354                 if (err)
2355                         return err;
2356                 goto send_done;
2357         }
2358         return genlmsg_reply(skb, info);
2359
2360 nla_put_failure:
2361         err = -EMSGSIZE;
2362 err_table_put:
2363         nlmsg_free(skb);
2364         return err;
2365 }
2366
2367 static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
2368                                             struct genl_info *info)
2369 {
2370         struct devlink *devlink = info->user_ptr[0];
2371
2372         if (!devlink->dpipe_headers)
2373                 return -EOPNOTSUPP;
2374         return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET,
2375                                           0, devlink->dpipe_headers);
2376 }
2377
2378 static int devlink_dpipe_table_counters_set(struct devlink *devlink,
2379                                             const char *table_name,
2380                                             bool enable)
2381 {
2382         struct devlink_dpipe_table *table;
2383
2384         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2385                                          table_name);
2386         if (!table)
2387                 return -EINVAL;
2388
2389         if (table->counter_control_extern)
2390                 return -EOPNOTSUPP;
2391
2392         if (!(table->counters_enabled ^ enable))
2393                 return 0;
2394
2395         table->counters_enabled = enable;
2396         if (table->table_ops->counters_set_update)
2397                 table->table_ops->counters_set_update(table->priv, enable);
2398         return 0;
2399 }
2400
2401 static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
2402                                                    struct genl_info *info)
2403 {
2404         struct devlink *devlink = info->user_ptr[0];
2405         const char *table_name;
2406         bool counters_enable;
2407
2408         if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] ||
2409             !info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED])
2410                 return -EINVAL;
2411
2412         table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2413         counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
2414
2415         return devlink_dpipe_table_counters_set(devlink, table_name,
2416                                                 counters_enable);
2417 }
2418
2419 static struct devlink_resource *
2420 devlink_resource_find(struct devlink *devlink,
2421                       struct devlink_resource *resource, u64 resource_id)
2422 {
2423         struct list_head *resource_list;
2424
2425         if (resource)
2426                 resource_list = &resource->resource_list;
2427         else
2428                 resource_list = &devlink->resource_list;
2429
2430         list_for_each_entry(resource, resource_list, list) {
2431                 struct devlink_resource *child_resource;
2432
2433                 if (resource->id == resource_id)
2434                         return resource;
2435
2436                 child_resource = devlink_resource_find(devlink, resource,
2437                                                        resource_id);
2438                 if (child_resource)
2439                         return child_resource;
2440         }
2441         return NULL;
2442 }
2443
2444 static void
2445 devlink_resource_validate_children(struct devlink_resource *resource)
2446 {
2447         struct devlink_resource *child_resource;
2448         bool size_valid = true;
2449         u64 parts_size = 0;
2450
2451         if (list_empty(&resource->resource_list))
2452                 goto out;
2453
2454         list_for_each_entry(child_resource, &resource->resource_list, list)
2455                 parts_size += child_resource->size_new;
2456
2457         if (parts_size > resource->size_new)
2458                 size_valid = false;
2459 out:
2460         resource->size_valid = size_valid;
2461 }
2462
2463 static int
2464 devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
2465                                struct netlink_ext_ack *extack)
2466 {
2467         u64 reminder;
2468         int err = 0;
2469
2470         if (size > resource->size_params.size_max) {
2471                 NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum");
2472                 err = -EINVAL;
2473         }
2474
2475         if (size < resource->size_params.size_min) {
2476                 NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum");
2477                 err = -EINVAL;
2478         }
2479
2480         div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
2481         if (reminder) {
2482                 NL_SET_ERR_MSG_MOD(extack, "Wrong granularity");
2483                 err = -EINVAL;
2484         }
2485
2486         return err;
2487 }
2488
2489 static int devlink_nl_cmd_resource_set(struct sk_buff *skb,
2490                                        struct genl_info *info)
2491 {
2492         struct devlink *devlink = info->user_ptr[0];
2493         struct devlink_resource *resource;
2494         u64 resource_id;
2495         u64 size;
2496         int err;
2497
2498         if (!info->attrs[DEVLINK_ATTR_RESOURCE_ID] ||
2499             !info->attrs[DEVLINK_ATTR_RESOURCE_SIZE])
2500                 return -EINVAL;
2501         resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);
2502
2503         resource = devlink_resource_find(devlink, NULL, resource_id);
2504         if (!resource)
2505                 return -EINVAL;
2506
2507         size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);
2508         err = devlink_resource_validate_size(resource, size, info->extack);
2509         if (err)
2510                 return err;
2511
2512         resource->size_new = size;
2513         devlink_resource_validate_children(resource);
2514         if (resource->parent)
2515                 devlink_resource_validate_children(resource->parent);
2516         return 0;
2517 }
2518
2519 static int
2520 devlink_resource_size_params_put(struct devlink_resource *resource,
2521                                  struct sk_buff *skb)
2522 {
2523         struct devlink_resource_size_params *size_params;
2524
2525         size_params = &resource->size_params;
2526         if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN,
2527                               size_params->size_granularity, DEVLINK_ATTR_PAD) ||
2528             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX,
2529                               size_params->size_max, DEVLINK_ATTR_PAD) ||
2530             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN,
2531                               size_params->size_min, DEVLINK_ATTR_PAD) ||
2532             nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))
2533                 return -EMSGSIZE;
2534         return 0;
2535 }
2536
2537 static int devlink_resource_occ_put(struct devlink_resource *resource,
2538                                     struct sk_buff *skb)
2539 {
2540         if (!resource->occ_get)
2541                 return 0;
2542         return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC,
2543                                  resource->occ_get(resource->occ_get_priv),
2544                                  DEVLINK_ATTR_PAD);
2545 }
2546
2547 static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
2548                                 struct devlink_resource *resource)
2549 {
2550         struct devlink_resource *child_resource;
2551         struct nlattr *child_resource_attr;
2552         struct nlattr *resource_attr;
2553
2554         resource_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE);
2555         if (!resource_attr)
2556                 return -EMSGSIZE;
2557
2558         if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
2559             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,
2560                               DEVLINK_ATTR_PAD) ||
2561             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,
2562                               DEVLINK_ATTR_PAD))
2563                 goto nla_put_failure;
2564         if (resource->size != resource->size_new)
2565                 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW,
2566                                   resource->size_new, DEVLINK_ATTR_PAD);
2567         if (devlink_resource_occ_put(resource, skb))
2568                 goto nla_put_failure;
2569         if (devlink_resource_size_params_put(resource, skb))
2570                 goto nla_put_failure;
2571         if (list_empty(&resource->resource_list))
2572                 goto out;
2573
2574         if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID,
2575                        resource->size_valid))
2576                 goto nla_put_failure;
2577
2578         child_resource_attr = nla_nest_start_noflag(skb,
2579                                                     DEVLINK_ATTR_RESOURCE_LIST);
2580         if (!child_resource_attr)
2581                 goto nla_put_failure;
2582
2583         list_for_each_entry(child_resource, &resource->resource_list, list) {
2584                 if (devlink_resource_put(devlink, skb, child_resource))
2585                         goto resource_put_failure;
2586         }
2587
2588         nla_nest_end(skb, child_resource_attr);
2589 out:
2590         nla_nest_end(skb, resource_attr);
2591         return 0;
2592
2593 resource_put_failure:
2594         nla_nest_cancel(skb, child_resource_attr);
2595 nla_put_failure:
2596         nla_nest_cancel(skb, resource_attr);
2597         return -EMSGSIZE;
2598 }
2599
2600 static int devlink_resource_fill(struct genl_info *info,
2601                                  enum devlink_command cmd, int flags)
2602 {
2603         struct devlink *devlink = info->user_ptr[0];
2604         struct devlink_resource *resource;
2605         struct nlattr *resources_attr;
2606         struct sk_buff *skb = NULL;
2607         struct nlmsghdr *nlh;
2608         bool incomplete;
2609         void *hdr;
2610         int i;
2611         int err;
2612
2613         resource = list_first_entry(&devlink->resource_list,
2614                                     struct devlink_resource, list);
2615 start_again:
2616         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2617         if (err)
2618                 return err;
2619
2620         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2621                           &devlink_nl_family, NLM_F_MULTI, cmd);
2622         if (!hdr) {
2623                 nlmsg_free(skb);
2624                 return -EMSGSIZE;
2625         }
2626
2627         if (devlink_nl_put_handle(skb, devlink))
2628                 goto nla_put_failure;
2629
2630         resources_attr = nla_nest_start_noflag(skb,
2631                                                DEVLINK_ATTR_RESOURCE_LIST);
2632         if (!resources_attr)
2633                 goto nla_put_failure;
2634
2635         incomplete = false;
2636         i = 0;
2637         list_for_each_entry_from(resource, &devlink->resource_list, list) {
2638                 err = devlink_resource_put(devlink, skb, resource);
2639                 if (err) {
2640                         if (!i)
2641                                 goto err_resource_put;
2642                         incomplete = true;
2643                         break;
2644                 }
2645                 i++;
2646         }
2647         nla_nest_end(skb, resources_attr);
2648         genlmsg_end(skb, hdr);
2649         if (incomplete)
2650                 goto start_again;
2651 send_done:
2652         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2653                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2654         if (!nlh) {
2655                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2656                 if (err)
2657                         return err;
2658                 goto send_done;
2659         }
2660         return genlmsg_reply(skb, info);
2661
2662 nla_put_failure:
2663         err = -EMSGSIZE;
2664 err_resource_put:
2665         nlmsg_free(skb);
2666         return err;
2667 }
2668
2669 static int devlink_nl_cmd_resource_dump(struct sk_buff *skb,
2670                                         struct genl_info *info)
2671 {
2672         struct devlink *devlink = info->user_ptr[0];
2673
2674         if (list_empty(&devlink->resource_list))
2675                 return -EOPNOTSUPP;
2676
2677         return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
2678 }
2679
2680 static int
2681 devlink_resources_validate(struct devlink *devlink,
2682                            struct devlink_resource *resource,
2683                            struct genl_info *info)
2684 {
2685         struct list_head *resource_list;
2686         int err = 0;
2687
2688         if (resource)
2689                 resource_list = &resource->resource_list;
2690         else
2691                 resource_list = &devlink->resource_list;
2692
2693         list_for_each_entry(resource, resource_list, list) {
2694                 if (!resource->size_valid)
2695                         return -EINVAL;
2696                 err = devlink_resources_validate(devlink, resource, info);
2697                 if (err)
2698                         return err;
2699         }
2700         return err;
2701 }
2702
2703 static struct net *devlink_netns_get(struct sk_buff *skb,
2704                                      struct genl_info *info)
2705 {
2706         struct nlattr *netns_pid_attr = info->attrs[DEVLINK_ATTR_NETNS_PID];
2707         struct nlattr *netns_fd_attr = info->attrs[DEVLINK_ATTR_NETNS_FD];
2708         struct nlattr *netns_id_attr = info->attrs[DEVLINK_ATTR_NETNS_ID];
2709         struct net *net;
2710
2711         if (!!netns_pid_attr + !!netns_fd_attr + !!netns_id_attr > 1) {
2712                 NL_SET_ERR_MSG(info->extack, "multiple netns identifying attributes specified");
2713                 return ERR_PTR(-EINVAL);
2714         }
2715
2716         if (netns_pid_attr) {
2717                 net = get_net_ns_by_pid(nla_get_u32(netns_pid_attr));
2718         } else if (netns_fd_attr) {
2719                 net = get_net_ns_by_fd(nla_get_u32(netns_fd_attr));
2720         } else if (netns_id_attr) {
2721                 net = get_net_ns_by_id(sock_net(skb->sk),
2722                                        nla_get_u32(netns_id_attr));
2723                 if (!net)
2724                         net = ERR_PTR(-EINVAL);
2725         } else {
2726                 WARN_ON(1);
2727                 net = ERR_PTR(-EINVAL);
2728         }
2729         if (IS_ERR(net)) {
2730                 NL_SET_ERR_MSG(info->extack, "Unknown network namespace");
2731                 return ERR_PTR(-EINVAL);
2732         }
2733         if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
2734                 put_net(net);
2735                 return ERR_PTR(-EPERM);
2736         }
2737         return net;
2738 }
2739
2740 static void devlink_param_notify(struct devlink *devlink,
2741                                  unsigned int port_index,
2742                                  struct devlink_param_item *param_item,
2743                                  enum devlink_command cmd);
2744
2745 static void devlink_reload_netns_change(struct devlink *devlink,
2746                                         struct net *dest_net)
2747 {
2748         struct devlink_param_item *param_item;
2749
2750         /* Userspace needs to be notified about devlink objects
2751          * removed from original and entering new network namespace.
2752          * The rest of the devlink objects are re-created during
2753          * reload process so the notifications are generated separatelly.
2754          */
2755
2756         list_for_each_entry(param_item, &devlink->param_list, list)
2757                 devlink_param_notify(devlink, 0, param_item,
2758                                      DEVLINK_CMD_PARAM_DEL);
2759         devlink_notify(devlink, DEVLINK_CMD_DEL);
2760
2761         __devlink_net_set(devlink, dest_net);
2762
2763         devlink_notify(devlink, DEVLINK_CMD_NEW);
2764         list_for_each_entry(param_item, &devlink->param_list, list)
2765                 devlink_param_notify(devlink, 0, param_item,
2766                                      DEVLINK_CMD_PARAM_NEW);
2767 }
2768
2769 static bool devlink_reload_supported(struct devlink *devlink)
2770 {
2771         return devlink->ops->reload_down && devlink->ops->reload_up;
2772 }
2773
2774 static void devlink_reload_failed_set(struct devlink *devlink,
2775                                       bool reload_failed)
2776 {
2777         if (devlink->reload_failed == reload_failed)
2778                 return;
2779         devlink->reload_failed = reload_failed;
2780         devlink_notify(devlink, DEVLINK_CMD_NEW);
2781 }
2782
2783 bool devlink_is_reload_failed(const struct devlink *devlink)
2784 {
2785         return devlink->reload_failed;
2786 }
2787 EXPORT_SYMBOL_GPL(devlink_is_reload_failed);
2788
2789 static int devlink_reload(struct devlink *devlink, struct net *dest_net,
2790                           struct netlink_ext_ack *extack)
2791 {
2792         int err;
2793
2794         err = devlink->ops->reload_down(devlink, !!dest_net, extack);
2795         if (err)
2796                 return err;
2797
2798         if (dest_net && !net_eq(dest_net, devlink_net(devlink)))
2799                 devlink_reload_netns_change(devlink, dest_net);
2800
2801         err = devlink->ops->reload_up(devlink, extack);
2802         devlink_reload_failed_set(devlink, !!err);
2803         return err;
2804 }
2805
2806 static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
2807 {
2808         struct devlink *devlink = info->user_ptr[0];
2809         struct net *dest_net = NULL;
2810         int err;
2811
2812         if (!devlink_reload_supported(devlink))
2813                 return -EOPNOTSUPP;
2814
2815         err = devlink_resources_validate(devlink, NULL, info);
2816         if (err) {
2817                 NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed");
2818                 return err;
2819         }
2820
2821         if (info->attrs[DEVLINK_ATTR_NETNS_PID] ||
2822             info->attrs[DEVLINK_ATTR_NETNS_FD] ||
2823             info->attrs[DEVLINK_ATTR_NETNS_ID]) {
2824                 dest_net = devlink_netns_get(skb, info);
2825                 if (IS_ERR(dest_net))
2826                         return PTR_ERR(dest_net);
2827         }
2828
2829         err = devlink_reload(devlink, dest_net, info->extack);
2830
2831         if (dest_net)
2832                 put_net(dest_net);
2833
2834         return err;
2835 }
2836
2837 static int devlink_nl_flash_update_fill(struct sk_buff *msg,
2838                                         struct devlink *devlink,
2839                                         enum devlink_command cmd,
2840                                         const char *status_msg,
2841                                         const char *component,
2842                                         unsigned long done, unsigned long total)
2843 {
2844         void *hdr;
2845
2846         hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
2847         if (!hdr)
2848                 return -EMSGSIZE;
2849
2850         if (devlink_nl_put_handle(msg, devlink))
2851                 goto nla_put_failure;
2852
2853         if (cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS)
2854                 goto out;
2855
2856         if (status_msg &&
2857             nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_MSG,
2858                            status_msg))
2859                 goto nla_put_failure;
2860         if (component &&
2861             nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_COMPONENT,
2862                            component))
2863                 goto nla_put_failure;
2864         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE,
2865                               done, DEVLINK_ATTR_PAD))
2866                 goto nla_put_failure;
2867         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL,
2868                               total, DEVLINK_ATTR_PAD))
2869                 goto nla_put_failure;
2870
2871 out:
2872         genlmsg_end(msg, hdr);
2873         return 0;
2874
2875 nla_put_failure:
2876         genlmsg_cancel(msg, hdr);
2877         return -EMSGSIZE;
2878 }
2879
2880 static void __devlink_flash_update_notify(struct devlink *devlink,
2881                                           enum devlink_command cmd,
2882                                           const char *status_msg,
2883                                           const char *component,
2884                                           unsigned long done,
2885                                           unsigned long total)
2886 {
2887         struct sk_buff *msg;
2888         int err;
2889
2890         WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE &&
2891                 cmd != DEVLINK_CMD_FLASH_UPDATE_END &&
2892                 cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS);
2893
2894         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2895         if (!msg)
2896                 return;
2897
2898         err = devlink_nl_flash_update_fill(msg, devlink, cmd, status_msg,
2899                                            component, done, total);
2900         if (err)
2901                 goto out_free_msg;
2902
2903         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
2904                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
2905         return;
2906
2907 out_free_msg:
2908         nlmsg_free(msg);
2909 }
2910
2911 void devlink_flash_update_begin_notify(struct devlink *devlink)
2912 {
2913         __devlink_flash_update_notify(devlink,
2914                                       DEVLINK_CMD_FLASH_UPDATE,
2915                                       NULL, NULL, 0, 0);
2916 }
2917 EXPORT_SYMBOL_GPL(devlink_flash_update_begin_notify);
2918
2919 void devlink_flash_update_end_notify(struct devlink *devlink)
2920 {
2921         __devlink_flash_update_notify(devlink,
2922                                       DEVLINK_CMD_FLASH_UPDATE_END,
2923                                       NULL, NULL, 0, 0);
2924 }
2925 EXPORT_SYMBOL_GPL(devlink_flash_update_end_notify);
2926
2927 void devlink_flash_update_status_notify(struct devlink *devlink,
2928                                         const char *status_msg,
2929                                         const char *component,
2930                                         unsigned long done,
2931                                         unsigned long total)
2932 {
2933         __devlink_flash_update_notify(devlink,
2934                                       DEVLINK_CMD_FLASH_UPDATE_STATUS,
2935                                       status_msg, component, done, total);
2936 }
2937 EXPORT_SYMBOL_GPL(devlink_flash_update_status_notify);
2938
2939 static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
2940                                        struct genl_info *info)
2941 {
2942         struct devlink *devlink = info->user_ptr[0];
2943         const char *file_name, *component;
2944         struct nlattr *nla_component;
2945
2946         if (!devlink->ops->flash_update)
2947                 return -EOPNOTSUPP;
2948
2949         if (!info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME])
2950                 return -EINVAL;
2951         file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]);
2952
2953         nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT];
2954         component = nla_component ? nla_data(nla_component) : NULL;
2955
2956         return devlink->ops->flash_update(devlink, file_name, component,
2957                                           info->extack);
2958 }
2959
2960 static const struct devlink_param devlink_param_generic[] = {
2961         {
2962                 .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
2963                 .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME,
2964                 .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE,
2965         },
2966         {
2967                 .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
2968                 .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME,
2969                 .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE,
2970         },
2971         {
2972                 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
2973                 .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME,
2974                 .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE,
2975         },
2976         {
2977                 .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
2978                 .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
2979                 .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
2980         },
2981         {
2982                 .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
2983                 .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME,
2984                 .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE,
2985         },
2986         {
2987                 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
2988                 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME,
2989                 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE,
2990         },
2991         {
2992                 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
2993                 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME,
2994                 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE,
2995         },
2996         {
2997                 .id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
2998                 .name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME,
2999                 .type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE,
3000         },
3001         {
3002                 .id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE,
3003                 .name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME,
3004                 .type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE,
3005         },
3006 };
3007
3008 static int devlink_param_generic_verify(const struct devlink_param *param)
3009 {
3010         /* verify it match generic parameter by id and name */
3011         if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
3012                 return -EINVAL;
3013         if (strcmp(param->name, devlink_param_generic[param->id].name))
3014                 return -ENOENT;
3015
3016         WARN_ON(param->type != devlink_param_generic[param->id].type);
3017
3018         return 0;
3019 }
3020
3021 static int devlink_param_driver_verify(const struct devlink_param *param)
3022 {
3023         int i;
3024
3025         if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
3026                 return -EINVAL;
3027         /* verify no such name in generic params */
3028         for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
3029                 if (!strcmp(param->name, devlink_param_generic[i].name))
3030                         return -EEXIST;
3031
3032         return 0;
3033 }
3034
3035 static struct devlink_param_item *
3036 devlink_param_find_by_name(struct list_head *param_list,
3037                            const char *param_name)
3038 {
3039         struct devlink_param_item *param_item;
3040
3041         list_for_each_entry(param_item, param_list, list)
3042                 if (!strcmp(param_item->param->name, param_name))
3043                         return param_item;
3044         return NULL;
3045 }
3046
3047 static struct devlink_param_item *
3048 devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
3049 {
3050         struct devlink_param_item *param_item;
3051
3052         list_for_each_entry(param_item, param_list, list)
3053                 if (param_item->param->id == param_id)
3054                         return param_item;
3055         return NULL;
3056 }
3057
3058 static bool
3059 devlink_param_cmode_is_supported(const struct devlink_param *param,
3060                                  enum devlink_param_cmode cmode)
3061 {
3062         return test_bit(cmode, &param->supported_cmodes);
3063 }
3064
3065 static int devlink_param_get(struct devlink *devlink,
3066                              const struct devlink_param *param,
3067                              struct devlink_param_gset_ctx *ctx)
3068 {
3069         if (!param->get)
3070                 return -EOPNOTSUPP;
3071         return param->get(devlink, param->id, ctx);
3072 }
3073
3074 static int devlink_param_set(struct devlink *devlink,
3075                              const struct devlink_param *param,
3076                              struct devlink_param_gset_ctx *ctx)
3077 {
3078         if (!param->set)
3079                 return -EOPNOTSUPP;
3080         return param->set(devlink, param->id, ctx);
3081 }
3082
3083 static int
3084 devlink_param_type_to_nla_type(enum devlink_param_type param_type)
3085 {
3086         switch (param_type) {
3087         case DEVLINK_PARAM_TYPE_U8:
3088                 return NLA_U8;
3089         case DEVLINK_PARAM_TYPE_U16:
3090                 return NLA_U16;
3091         case DEVLINK_PARAM_TYPE_U32:
3092                 return NLA_U32;
3093         case DEVLINK_PARAM_TYPE_STRING:
3094                 return NLA_STRING;
3095         case DEVLINK_PARAM_TYPE_BOOL:
3096                 return NLA_FLAG;
3097         default:
3098                 return -EINVAL;
3099         }
3100 }
3101
3102 static int
3103 devlink_nl_param_value_fill_one(struct sk_buff *msg,
3104                                 enum devlink_param_type type,
3105                                 enum devlink_param_cmode cmode,
3106                                 union devlink_param_value val)
3107 {
3108         struct nlattr *param_value_attr;
3109
3110         param_value_attr = nla_nest_start_noflag(msg,
3111                                                  DEVLINK_ATTR_PARAM_VALUE);
3112         if (!param_value_attr)
3113                 goto nla_put_failure;
3114
3115         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
3116                 goto value_nest_cancel;
3117
3118         switch (type) {
3119         case DEVLINK_PARAM_TYPE_U8:
3120                 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
3121                         goto value_nest_cancel;
3122                 break;
3123         case DEVLINK_PARAM_TYPE_U16:
3124                 if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
3125                         goto value_nest_cancel;
3126                 break;
3127         case DEVLINK_PARAM_TYPE_U32:
3128                 if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
3129                         goto value_nest_cancel;
3130                 break;
3131         case DEVLINK_PARAM_TYPE_STRING:
3132                 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
3133                                    val.vstr))
3134                         goto value_nest_cancel;
3135                 break;
3136         case DEVLINK_PARAM_TYPE_BOOL:
3137                 if (val.vbool &&
3138                     nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
3139                         goto value_nest_cancel;
3140                 break;
3141         }
3142
3143         nla_nest_end(msg, param_value_attr);
3144         return 0;
3145
3146 value_nest_cancel:
3147         nla_nest_cancel(msg, param_value_attr);
3148 nla_put_failure:
3149         return -EMSGSIZE;
3150 }
3151
3152 static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
3153                                  unsigned int port_index,
3154                                  struct devlink_param_item *param_item,
3155                                  enum devlink_command cmd,
3156                                  u32 portid, u32 seq, int flags)
3157 {
3158         union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
3159         bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {};
3160         const struct devlink_param *param = param_item->param;
3161         struct devlink_param_gset_ctx ctx;
3162         struct nlattr *param_values_list;
3163         struct nlattr *param_attr;
3164         int nla_type;
3165         void *hdr;
3166         int err;
3167         int i;
3168
3169         /* Get value from driver part to driverinit configuration mode */
3170         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3171                 if (!devlink_param_cmode_is_supported(param, i))
3172                         continue;
3173                 if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3174                         if (!param_item->driverinit_value_valid)
3175                                 return -EOPNOTSUPP;
3176                         param_value[i] = param_item->driverinit_value;
3177                 } else {
3178                         if (!param_item->published)
3179                                 continue;
3180                         ctx.cmode = i;
3181                         err = devlink_param_get(devlink, param, &ctx);
3182                         if (err)
3183                                 return err;
3184                         param_value[i] = ctx.val;
3185                 }
3186                 param_value_set[i] = true;
3187         }
3188
3189         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3190         if (!hdr)
3191                 return -EMSGSIZE;
3192
3193         if (devlink_nl_put_handle(msg, devlink))
3194                 goto genlmsg_cancel;
3195
3196         if (cmd == DEVLINK_CMD_PORT_PARAM_GET ||
3197             cmd == DEVLINK_CMD_PORT_PARAM_NEW ||
3198             cmd == DEVLINK_CMD_PORT_PARAM_DEL)
3199                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index))
3200                         goto genlmsg_cancel;
3201
3202         param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM);
3203         if (!param_attr)
3204                 goto genlmsg_cancel;
3205         if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
3206                 goto param_nest_cancel;
3207         if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
3208                 goto param_nest_cancel;
3209
3210         nla_type = devlink_param_type_to_nla_type(param->type);
3211         if (nla_type < 0)
3212                 goto param_nest_cancel;
3213         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
3214                 goto param_nest_cancel;
3215
3216         param_values_list = nla_nest_start_noflag(msg,
3217                                                   DEVLINK_ATTR_PARAM_VALUES_LIST);
3218         if (!param_values_list)
3219                 goto param_nest_cancel;
3220
3221         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3222                 if (!param_value_set[i])
3223                         continue;
3224                 err = devlink_nl_param_value_fill_one(msg, param->type,
3225                                                       i, param_value[i]);
3226                 if (err)
3227                         goto values_list_nest_cancel;
3228         }
3229
3230         nla_nest_end(msg, param_values_list);
3231         nla_nest_end(msg, param_attr);
3232         genlmsg_end(msg, hdr);
3233         return 0;
3234
3235 values_list_nest_cancel:
3236         nla_nest_end(msg, param_values_list);
3237 param_nest_cancel:
3238         nla_nest_cancel(msg, param_attr);
3239 genlmsg_cancel:
3240         genlmsg_cancel(msg, hdr);
3241         return -EMSGSIZE;
3242 }
3243
3244 static void devlink_param_notify(struct devlink *devlink,
3245                                  unsigned int port_index,
3246                                  struct devlink_param_item *param_item,
3247                                  enum devlink_command cmd)
3248 {
3249         struct sk_buff *msg;
3250         int err;
3251
3252         WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL &&
3253                 cmd != DEVLINK_CMD_PORT_PARAM_NEW &&
3254                 cmd != DEVLINK_CMD_PORT_PARAM_DEL);
3255
3256         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3257         if (!msg)
3258                 return;
3259         err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd,
3260                                     0, 0, 0);
3261         if (err) {
3262                 nlmsg_free(msg);
3263                 return;
3264         }
3265
3266         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3267                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3268 }
3269
3270 static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
3271                                            struct netlink_callback *cb)
3272 {
3273         struct devlink_param_item *param_item;
3274         struct devlink *devlink;
3275         int start = cb->args[0];
3276         int idx = 0;
3277         int err = 0;
3278
3279         mutex_lock(&devlink_mutex);
3280         list_for_each_entry(devlink, &devlink_list, list) {
3281                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3282                         continue;
3283                 mutex_lock(&devlink->lock);
3284                 list_for_each_entry(param_item, &devlink->param_list, list) {
3285                         if (idx < start) {
3286                                 idx++;
3287                                 continue;
3288                         }
3289                         err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3290                                                     DEVLINK_CMD_PARAM_GET,
3291                                                     NETLINK_CB(cb->skb).portid,
3292                                                     cb->nlh->nlmsg_seq,
3293                                                     NLM_F_MULTI);
3294                         if (err && err != -EOPNOTSUPP) {
3295                                 mutex_unlock(&devlink->lock);
3296                                 goto out;
3297                         }
3298                         idx++;
3299                 }
3300                 mutex_unlock(&devlink->lock);
3301         }
3302 out:
3303         mutex_unlock(&devlink_mutex);
3304
3305         if (err != -EMSGSIZE)
3306                 return err;
3307
3308         cb->args[0] = idx;
3309         return msg->len;
3310 }
3311
3312 static int
3313 devlink_param_type_get_from_info(struct genl_info *info,
3314                                  enum devlink_param_type *param_type)
3315 {
3316         if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE])
3317                 return -EINVAL;
3318
3319         switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
3320         case NLA_U8:
3321                 *param_type = DEVLINK_PARAM_TYPE_U8;
3322                 break;
3323         case NLA_U16:
3324                 *param_type = DEVLINK_PARAM_TYPE_U16;
3325                 break;
3326         case NLA_U32:
3327                 *param_type = DEVLINK_PARAM_TYPE_U32;
3328                 break;
3329         case NLA_STRING:
3330                 *param_type = DEVLINK_PARAM_TYPE_STRING;
3331                 break;
3332         case NLA_FLAG:
3333                 *param_type = DEVLINK_PARAM_TYPE_BOOL;
3334                 break;
3335         default:
3336                 return -EINVAL;
3337         }
3338
3339         return 0;
3340 }
3341
3342 static int
3343 devlink_param_value_get_from_info(const struct devlink_param *param,
3344                                   struct genl_info *info,
3345                                   union devlink_param_value *value)
3346 {
3347         int len;
3348
3349         if (param->type != DEVLINK_PARAM_TYPE_BOOL &&
3350             !info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA])
3351                 return -EINVAL;
3352
3353         switch (param->type) {
3354         case DEVLINK_PARAM_TYPE_U8:
3355                 value->vu8 = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3356                 break;
3357         case DEVLINK_PARAM_TYPE_U16:
3358                 value->vu16 = nla_get_u16(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3359                 break;
3360         case DEVLINK_PARAM_TYPE_U32:
3361                 value->vu32 = nla_get_u32(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3362                 break;
3363         case DEVLINK_PARAM_TYPE_STRING:
3364                 len = strnlen(nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]),
3365                               nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3366                 if (len == nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) ||
3367                     len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
3368                         return -EINVAL;
3369                 strcpy(value->vstr,
3370                        nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3371                 break;
3372         case DEVLINK_PARAM_TYPE_BOOL:
3373                 value->vbool = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA] ?
3374                                true : false;
3375                 break;
3376         }
3377         return 0;
3378 }
3379
3380 static struct devlink_param_item *
3381 devlink_param_get_from_info(struct list_head *param_list,
3382                             struct genl_info *info)
3383 {
3384         char *param_name;
3385
3386         if (!info->attrs[DEVLINK_ATTR_PARAM_NAME])
3387                 return NULL;
3388
3389         param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
3390         return devlink_param_find_by_name(param_list, param_name);
3391 }
3392
3393 static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
3394                                          struct genl_info *info)
3395 {
3396         struct devlink *devlink = info->user_ptr[0];
3397         struct devlink_param_item *param_item;
3398         struct sk_buff *msg;
3399         int err;
3400
3401         param_item = devlink_param_get_from_info(&devlink->param_list, info);
3402         if (!param_item)
3403                 return -EINVAL;
3404
3405         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3406         if (!msg)
3407                 return -ENOMEM;
3408
3409         err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3410                                     DEVLINK_CMD_PARAM_GET,
3411                                     info->snd_portid, info->snd_seq, 0);
3412         if (err) {
3413                 nlmsg_free(msg);
3414                 return err;
3415         }
3416
3417         return genlmsg_reply(msg, info);
3418 }
3419
3420 static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink,
3421                                            unsigned int port_index,
3422                                            struct list_head *param_list,
3423                                            struct genl_info *info,
3424                                            enum devlink_command cmd)
3425 {
3426         enum devlink_param_type param_type;
3427         struct devlink_param_gset_ctx ctx;
3428         enum devlink_param_cmode cmode;
3429         struct devlink_param_item *param_item;
3430         const struct devlink_param *param;
3431         union devlink_param_value value;
3432         int err = 0;
3433
3434         param_item = devlink_param_get_from_info(param_list, info);
3435         if (!param_item)
3436                 return -EINVAL;
3437         param = param_item->param;
3438         err = devlink_param_type_get_from_info(info, &param_type);
3439         if (err)
3440                 return err;
3441         if (param_type != param->type)
3442                 return -EINVAL;
3443         err = devlink_param_value_get_from_info(param, info, &value);
3444         if (err)
3445                 return err;
3446         if (param->validate) {
3447                 err = param->validate(devlink, param->id, value, info->extack);
3448                 if (err)
3449                         return err;
3450         }
3451
3452         if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE])
3453                 return -EINVAL;
3454         cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
3455         if (!devlink_param_cmode_is_supported(param, cmode))
3456                 return -EOPNOTSUPP;
3457
3458         if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3459                 if (param->type == DEVLINK_PARAM_TYPE_STRING)
3460                         strcpy(param_item->driverinit_value.vstr, value.vstr);
3461                 else
3462                         param_item->driverinit_value = value;
3463                 param_item->driverinit_value_valid = true;
3464         } else {
3465                 if (!param->set)
3466                         return -EOPNOTSUPP;
3467                 ctx.val = value;
3468                 ctx.cmode = cmode;
3469                 err = devlink_param_set(devlink, param, &ctx);
3470                 if (err)
3471                         return err;
3472         }
3473
3474         devlink_param_notify(devlink, port_index, param_item, cmd);
3475         return 0;
3476 }
3477
3478 static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
3479                                          struct genl_info *info)
3480 {
3481         struct devlink *devlink = info->user_ptr[0];
3482
3483         return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->param_list,
3484                                                info, DEVLINK_CMD_PARAM_NEW);
3485 }
3486
3487 static int devlink_param_register_one(struct devlink *devlink,
3488                                       unsigned int port_index,
3489                                       struct list_head *param_list,
3490                                       const struct devlink_param *param,
3491                                       enum devlink_command cmd)
3492 {
3493         struct devlink_param_item *param_item;
3494
3495         if (devlink_param_find_by_name(param_list, param->name))
3496                 return -EEXIST;
3497
3498         if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
3499                 WARN_ON(param->get || param->set);
3500         else
3501                 WARN_ON(!param->get || !param->set);
3502
3503         param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
3504         if (!param_item)
3505                 return -ENOMEM;
3506         param_item->param = param;
3507
3508         list_add_tail(&param_item->list, param_list);
3509         devlink_param_notify(devlink, port_index, param_item, cmd);
3510         return 0;
3511 }
3512
3513 static void devlink_param_unregister_one(struct devlink *devlink,
3514                                          unsigned int port_index,
3515                                          struct list_head *param_list,
3516                                          const struct devlink_param *param,
3517                                          enum devlink_command cmd)
3518 {
3519         struct devlink_param_item *param_item;
3520
3521         param_item = devlink_param_find_by_name(param_list, param->name);
3522         WARN_ON(!param_item);
3523         devlink_param_notify(devlink, port_index, param_item, cmd);
3524         list_del(&param_item->list);
3525         kfree(param_item);
3526 }
3527
3528 static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg,
3529                                                 struct netlink_callback *cb)
3530 {
3531         struct devlink_param_item *param_item;
3532         struct devlink_port *devlink_port;
3533         struct devlink *devlink;
3534         int start = cb->args[0];
3535         int idx = 0;
3536         int err = 0;
3537
3538         mutex_lock(&devlink_mutex);
3539         list_for_each_entry(devlink, &devlink_list, list) {
3540                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3541                         continue;
3542                 mutex_lock(&devlink->lock);
3543                 list_for_each_entry(devlink_port, &devlink->port_list, list) {
3544                         list_for_each_entry(param_item,
3545                                             &devlink_port->param_list, list) {
3546                                 if (idx < start) {
3547                                         idx++;
3548                                         continue;
3549                                 }
3550                                 err = devlink_nl_param_fill(msg,
3551                                                 devlink_port->devlink,
3552                                                 devlink_port->index, param_item,
3553                                                 DEVLINK_CMD_PORT_PARAM_GET,
3554                                                 NETLINK_CB(cb->skb).portid,
3555                                                 cb->nlh->nlmsg_seq,
3556                                                 NLM_F_MULTI);
3557                                 if (err && err != -EOPNOTSUPP) {
3558                                         mutex_unlock(&devlink->lock);
3559                                         goto out;
3560                                 }
3561                                 idx++;
3562                         }
3563                 }
3564                 mutex_unlock(&devlink->lock);
3565         }
3566 out:
3567         mutex_unlock(&devlink_mutex);
3568
3569         if (err != -EMSGSIZE)
3570                 return err;
3571
3572         cb->args[0] = idx;
3573         return msg->len;
3574 }
3575
3576 static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
3577                                               struct genl_info *info)
3578 {
3579         struct devlink_port *devlink_port = info->user_ptr[0];
3580         struct devlink_param_item *param_item;
3581         struct sk_buff *msg;
3582         int err;
3583
3584         param_item = devlink_param_get_from_info(&devlink_port->param_list,
3585                                                  info);
3586         if (!param_item)
3587                 return -EINVAL;
3588
3589         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3590         if (!msg)
3591                 return -ENOMEM;
3592
3593         err = devlink_nl_param_fill(msg, devlink_port->devlink,
3594                                     devlink_port->index, param_item,
3595                                     DEVLINK_CMD_PORT_PARAM_GET,
3596                                     info->snd_portid, info->snd_seq, 0);
3597         if (err) {
3598                 nlmsg_free(msg);
3599                 return err;
3600         }
3601
3602         return genlmsg_reply(msg, info);
3603 }
3604
3605 static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
3606                                               struct genl_info *info)
3607 {
3608         struct devlink_port *devlink_port = info->user_ptr[0];
3609
3610         return __devlink_nl_cmd_param_set_doit(devlink_port->devlink,
3611                                                devlink_port->index,
3612                                                &devlink_port->param_list, info,
3613                                                DEVLINK_CMD_PORT_PARAM_NEW);
3614 }
3615
3616 static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
3617                                              struct devlink *devlink,
3618                                              struct devlink_snapshot *snapshot)
3619 {
3620         struct nlattr *snap_attr;
3621         int err;
3622
3623         snap_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
3624         if (!snap_attr)
3625                 return -EINVAL;
3626
3627         err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
3628         if (err)
3629                 goto nla_put_failure;
3630
3631         nla_nest_end(msg, snap_attr);
3632         return 0;
3633
3634 nla_put_failure:
3635         nla_nest_cancel(msg, snap_attr);
3636         return err;
3637 }
3638
3639 static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
3640                                               struct devlink *devlink,
3641                                               struct devlink_region *region)
3642 {
3643         struct devlink_snapshot *snapshot;
3644         struct nlattr *snapshots_attr;
3645         int err;
3646
3647         snapshots_attr = nla_nest_start_noflag(msg,
3648                                                DEVLINK_ATTR_REGION_SNAPSHOTS);
3649         if (!snapshots_attr)
3650                 return -EINVAL;
3651
3652         list_for_each_entry(snapshot, &region->snapshot_list, list) {
3653                 err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
3654                 if (err)
3655                         goto nla_put_failure;
3656         }
3657
3658         nla_nest_end(msg, snapshots_attr);
3659         return 0;
3660
3661 nla_put_failure:
3662         nla_nest_cancel(msg, snapshots_attr);
3663         return err;
3664 }
3665
3666 static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
3667                                   enum devlink_command cmd, u32 portid,
3668                                   u32 seq, int flags,
3669                                   struct devlink_region *region)
3670 {
3671         void *hdr;
3672         int err;
3673
3674         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3675         if (!hdr)
3676                 return -EMSGSIZE;
3677
3678         err = devlink_nl_put_handle(msg, devlink);
3679         if (err)
3680                 goto nla_put_failure;
3681
3682         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->name);
3683         if (err)
3684                 goto nla_put_failure;
3685
3686         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3687                                 region->size,
3688                                 DEVLINK_ATTR_PAD);
3689         if (err)
3690                 goto nla_put_failure;
3691
3692         err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
3693         if (err)
3694                 goto nla_put_failure;
3695
3696         genlmsg_end(msg, hdr);
3697         return 0;
3698
3699 nla_put_failure:
3700         genlmsg_cancel(msg, hdr);
3701         return err;
3702 }
3703
3704 static void devlink_nl_region_notify(struct devlink_region *region,
3705                                      struct devlink_snapshot *snapshot,
3706                                      enum devlink_command cmd)
3707 {
3708         struct devlink *devlink = region->devlink;
3709         struct sk_buff *msg;
3710         void *hdr;
3711         int err;
3712
3713         WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
3714
3715         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3716         if (!msg)
3717                 return;
3718
3719         hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
3720         if (!hdr)
3721                 goto out_free_msg;
3722
3723         err = devlink_nl_put_handle(msg, devlink);
3724         if (err)
3725                 goto out_cancel_msg;
3726
3727         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
3728                              region->name);
3729         if (err)
3730                 goto out_cancel_msg;
3731
3732         if (snapshot) {
3733                 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
3734                                   snapshot->id);
3735                 if (err)
3736                         goto out_cancel_msg;
3737         } else {
3738                 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3739                                         region->size, DEVLINK_ATTR_PAD);
3740                 if (err)
3741                         goto out_cancel_msg;
3742         }
3743         genlmsg_end(msg, hdr);
3744
3745         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3746                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3747
3748         return;
3749
3750 out_cancel_msg:
3751         genlmsg_cancel(msg, hdr);
3752 out_free_msg:
3753         nlmsg_free(msg);
3754 }
3755
3756 static void devlink_region_snapshot_del(struct devlink_region *region,
3757                                         struct devlink_snapshot *snapshot)
3758 {
3759         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
3760         region->cur_snapshots--;
3761         list_del(&snapshot->list);
3762         (*snapshot->data_destructor)(snapshot->data);
3763         kfree(snapshot);
3764 }
3765
3766 static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
3767                                           struct genl_info *info)
3768 {
3769         struct devlink *devlink = info->user_ptr[0];
3770         struct devlink_region *region;
3771         const char *region_name;
3772         struct sk_buff *msg;
3773         int err;
3774
3775         if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
3776                 return -EINVAL;
3777
3778         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3779         region = devlink_region_get_by_name(devlink, region_name);
3780         if (!region)
3781                 return -EINVAL;
3782
3783         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3784         if (!msg)
3785                 return -ENOMEM;
3786
3787         err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
3788                                      info->snd_portid, info->snd_seq, 0,
3789                                      region);
3790         if (err) {
3791                 nlmsg_free(msg);
3792                 return err;
3793         }
3794
3795         return genlmsg_reply(msg, info);
3796 }
3797
3798 static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
3799                                             struct netlink_callback *cb)
3800 {
3801         struct devlink_region *region;
3802         struct devlink *devlink;
3803         int start = cb->args[0];
3804         int idx = 0;
3805         int err;
3806
3807         mutex_lock(&devlink_mutex);
3808         list_for_each_entry(devlink, &devlink_list, list) {
3809                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3810                         continue;
3811
3812                 mutex_lock(&devlink->lock);
3813                 list_for_each_entry(region, &devlink->region_list, list) {
3814                         if (idx < start) {
3815                                 idx++;
3816                                 continue;
3817                         }
3818                         err = devlink_nl_region_fill(msg, devlink,
3819                                                      DEVLINK_CMD_REGION_GET,
3820                                                      NETLINK_CB(cb->skb).portid,
3821                                                      cb->nlh->nlmsg_seq,
3822                                                      NLM_F_MULTI, region);
3823                         if (err) {
3824                                 mutex_unlock(&devlink->lock);
3825                                 goto out;
3826                         }
3827                         idx++;
3828                 }
3829                 mutex_unlock(&devlink->lock);
3830         }
3831 out:
3832         mutex_unlock(&devlink_mutex);
3833         cb->args[0] = idx;
3834         return msg->len;
3835 }
3836
3837 static int devlink_nl_cmd_region_del(struct sk_buff *skb,
3838                                      struct genl_info *info)
3839 {
3840         struct devlink *devlink = info->user_ptr[0];
3841         struct devlink_snapshot *snapshot;
3842         struct devlink_region *region;
3843         const char *region_name;
3844         u32 snapshot_id;
3845
3846         if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
3847             !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
3848                 return -EINVAL;
3849
3850         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3851         snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3852
3853         region = devlink_region_get_by_name(devlink, region_name);
3854         if (!region)
3855                 return -EINVAL;
3856
3857         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3858         if (!snapshot)
3859                 return -EINVAL;
3860
3861         devlink_region_snapshot_del(region, snapshot);
3862         return 0;
3863 }
3864
3865 static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
3866                                                  struct devlink *devlink,
3867                                                  u8 *chunk, u32 chunk_size,
3868                                                  u64 addr)
3869 {
3870         struct nlattr *chunk_attr;
3871         int err;
3872
3873         chunk_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_CHUNK);
3874         if (!chunk_attr)
3875                 return -EINVAL;
3876
3877         err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
3878         if (err)
3879                 goto nla_put_failure;
3880
3881         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
3882                                 DEVLINK_ATTR_PAD);
3883         if (err)
3884                 goto nla_put_failure;
3885
3886         nla_nest_end(msg, chunk_attr);
3887         return 0;
3888
3889 nla_put_failure:
3890         nla_nest_cancel(msg, chunk_attr);
3891         return err;
3892 }
3893
3894 #define DEVLINK_REGION_READ_CHUNK_SIZE 256
3895
3896 static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
3897                                                 struct devlink *devlink,
3898                                                 struct devlink_region *region,
3899                                                 struct nlattr **attrs,
3900                                                 u64 start_offset,
3901                                                 u64 end_offset,
3902                                                 bool dump,
3903                                                 u64 *new_offset)
3904 {
3905         struct devlink_snapshot *snapshot;
3906         u64 curr_offset = start_offset;
3907         u32 snapshot_id;
3908         int err = 0;
3909
3910         *new_offset = start_offset;
3911
3912         snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3913         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3914         if (!snapshot)
3915                 return -EINVAL;
3916
3917         if (end_offset > region->size || dump)
3918                 end_offset = region->size;
3919
3920         while (curr_offset < end_offset) {
3921                 u32 data_size;
3922                 u8 *data;
3923
3924                 if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
3925                         data_size = end_offset - curr_offset;
3926                 else
3927                         data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
3928
3929                 data = &snapshot->data[curr_offset];
3930                 err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
3931                                                             data, data_size,
3932                                                             curr_offset);
3933                 if (err)
3934                         break;
3935
3936                 curr_offset += data_size;
3937         }
3938         *new_offset = curr_offset;
3939
3940         return err;
3941 }
3942
3943 static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
3944                                              struct netlink_callback *cb)
3945 {
3946         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
3947         u64 ret_offset, start_offset, end_offset = 0;
3948         struct nlattr **attrs = info->attrs;
3949         struct devlink_region *region;
3950         struct nlattr *chunks_attr;
3951         const char *region_name;
3952         struct devlink *devlink;
3953         bool dump = true;
3954         void *hdr;
3955         int err;
3956
3957         start_offset = *((u64 *)&cb->args[0]);
3958
3959         mutex_lock(&devlink_mutex);
3960         devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
3961         if (IS_ERR(devlink)) {
3962                 err = PTR_ERR(devlink);
3963                 goto out_dev;
3964         }
3965
3966         mutex_lock(&devlink->lock);
3967
3968         if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
3969             !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
3970                 err = -EINVAL;
3971                 goto out_unlock;
3972         }
3973
3974         region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
3975         region = devlink_region_get_by_name(devlink, region_name);
3976         if (!region) {
3977                 err = -EINVAL;
3978                 goto out_unlock;
3979         }
3980
3981         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3982                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
3983                           DEVLINK_CMD_REGION_READ);
3984         if (!hdr) {
3985                 err = -EMSGSIZE;
3986                 goto out_unlock;
3987         }
3988
3989         err = devlink_nl_put_handle(skb, devlink);
3990         if (err)
3991                 goto nla_put_failure;
3992
3993         err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
3994         if (err)
3995                 goto nla_put_failure;
3996
3997         chunks_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_REGION_CHUNKS);
3998         if (!chunks_attr) {
3999                 err = -EMSGSIZE;
4000                 goto nla_put_failure;
4001         }
4002
4003         if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
4004             attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
4005                 if (!start_offset)
4006                         start_offset =
4007                                 nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4008
4009                 end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4010                 end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
4011                 dump = false;
4012         }
4013
4014         err = devlink_nl_region_read_snapshot_fill(skb, devlink,
4015                                                    region, attrs,
4016                                                    start_offset,
4017                                                    end_offset, dump,
4018                                                    &ret_offset);
4019
4020         if (err && err != -EMSGSIZE)
4021                 goto nla_put_failure;
4022
4023         /* Check if there was any progress done to prevent infinite loop */
4024         if (ret_offset == start_offset) {
4025                 err = -EINVAL;
4026                 goto nla_put_failure;
4027         }
4028
4029         *((u64 *)&cb->args[0]) = ret_offset;
4030
4031         nla_nest_end(skb, chunks_attr);
4032         genlmsg_end(skb, hdr);
4033         mutex_unlock(&devlink->lock);
4034         mutex_unlock(&devlink_mutex);
4035
4036         return skb->len;
4037
4038 nla_put_failure:
4039         genlmsg_cancel(skb, hdr);
4040 out_unlock:
4041         mutex_unlock(&devlink->lock);
4042 out_dev:
4043         mutex_unlock(&devlink_mutex);
4044         return err;
4045 }
4046
4047 struct devlink_info_req {
4048         struct sk_buff *msg;
4049 };
4050
4051 int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name)
4052 {
4053         return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name);
4054 }
4055 EXPORT_SYMBOL_GPL(devlink_info_driver_name_put);
4056
4057 int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
4058 {
4059         return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn);
4060 }
4061 EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
4062
4063 static int devlink_info_version_put(struct devlink_info_req *req, int attr,
4064                                     const char *version_name,
4065                                     const char *version_value)
4066 {
4067         struct nlattr *nest;
4068         int err;
4069
4070         nest = nla_nest_start_noflag(req->msg, attr);
4071         if (!nest)
4072                 return -EMSGSIZE;
4073
4074         err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME,
4075                              version_name);
4076         if (err)
4077                 goto nla_put_failure;
4078
4079         err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE,
4080                              version_value);
4081         if (err)
4082                 goto nla_put_failure;
4083
4084         nla_nest_end(req->msg, nest);
4085
4086         return 0;
4087
4088 nla_put_failure:
4089         nla_nest_cancel(req->msg, nest);
4090         return err;
4091 }
4092
4093 int devlink_info_version_fixed_put(struct devlink_info_req *req,
4094                                    const char *version_name,
4095                                    const char *version_value)
4096 {
4097         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED,
4098                                         version_name, version_value);
4099 }
4100 EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
4101
4102 int devlink_info_version_stored_put(struct devlink_info_req *req,
4103                                     const char *version_name,
4104                                     const char *version_value)
4105 {
4106         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
4107                                         version_name, version_value);
4108 }
4109 EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
4110
4111 int devlink_info_version_running_put(struct devlink_info_req *req,
4112                                      const char *version_name,
4113                                      const char *version_value)
4114 {
4115         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
4116                                         version_name, version_value);
4117 }
4118 EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
4119
4120 static int
4121 devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
4122                      enum devlink_command cmd, u32 portid,
4123                      u32 seq, int flags, struct netlink_ext_ack *extack)
4124 {
4125         struct devlink_info_req req;
4126         void *hdr;
4127         int err;
4128
4129         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4130         if (!hdr)
4131                 return -EMSGSIZE;
4132
4133         err = -EMSGSIZE;
4134         if (devlink_nl_put_handle(msg, devlink))
4135                 goto err_cancel_msg;
4136
4137         req.msg = msg;
4138         err = devlink->ops->info_get(devlink, &req, extack);
4139         if (err)
4140                 goto err_cancel_msg;
4141
4142         genlmsg_end(msg, hdr);
4143         return 0;
4144
4145 err_cancel_msg:
4146         genlmsg_cancel(msg, hdr);
4147         return err;
4148 }
4149
4150 static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb,
4151                                         struct genl_info *info)
4152 {
4153         struct devlink *devlink = info->user_ptr[0];
4154         struct sk_buff *msg;
4155         int err;
4156
4157         if (!devlink->ops->info_get)
4158                 return -EOPNOTSUPP;
4159
4160         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4161         if (!msg)
4162                 return -ENOMEM;
4163
4164         err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4165                                    info->snd_portid, info->snd_seq, 0,
4166                                    info->extack);
4167         if (err) {
4168                 nlmsg_free(msg);
4169                 return err;
4170         }
4171
4172         return genlmsg_reply(msg, info);
4173 }
4174
4175 static int devlink_nl_cmd_info_get_dumpit(struct sk_buff *msg,
4176                                           struct netlink_callback *cb)
4177 {
4178         struct devlink *devlink;
4179         int start = cb->args[0];
4180         int idx = 0;
4181         int err = 0;
4182
4183         mutex_lock(&devlink_mutex);
4184         list_for_each_entry(devlink, &devlink_list, list) {
4185                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4186                         continue;
4187                 if (idx < start) {
4188                         idx++;
4189                         continue;
4190                 }
4191
4192                 if (!devlink->ops->info_get) {
4193                         idx++;
4194                         continue;
4195                 }
4196
4197                 mutex_lock(&devlink->lock);
4198                 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4199                                            NETLINK_CB(cb->skb).portid,
4200                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
4201                                            cb->extack);
4202                 mutex_unlock(&devlink->lock);
4203                 if (err && err != -EOPNOTSUPP)
4204                         break;
4205                 idx++;
4206         }
4207         mutex_unlock(&devlink_mutex);
4208
4209         if (err != -EMSGSIZE)
4210                 return err;
4211
4212         cb->args[0] = idx;
4213         return msg->len;
4214 }
4215
4216 struct devlink_fmsg_item {
4217         struct list_head list;
4218         int attrtype;
4219         u8 nla_type;
4220         u16 len;
4221         int value[0];
4222 };
4223
4224 struct devlink_fmsg {
4225         struct list_head item_list;
4226 };
4227
4228 static struct devlink_fmsg *devlink_fmsg_alloc(void)
4229 {
4230         struct devlink_fmsg *fmsg;
4231
4232         fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
4233         if (!fmsg)
4234                 return NULL;
4235
4236         INIT_LIST_HEAD(&fmsg->item_list);
4237
4238         return fmsg;
4239 }
4240
4241 static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
4242 {
4243         struct devlink_fmsg_item *item, *tmp;
4244
4245         list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
4246                 list_del(&item->list);
4247                 kfree(item);
4248         }
4249         kfree(fmsg);
4250 }
4251
4252 static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
4253                                     int attrtype)
4254 {
4255         struct devlink_fmsg_item *item;
4256
4257         item = kzalloc(sizeof(*item), GFP_KERNEL);
4258         if (!item)
4259                 return -ENOMEM;
4260
4261         item->attrtype = attrtype;
4262         list_add_tail(&item->list, &fmsg->item_list);
4263
4264         return 0;
4265 }
4266
4267 int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
4268 {
4269         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
4270 }
4271 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
4272
4273 static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
4274 {
4275         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
4276 }
4277
4278 int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
4279 {
4280         return devlink_fmsg_nest_end(fmsg);
4281 }
4282 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
4283
4284 #define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
4285
4286 static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
4287 {
4288         struct devlink_fmsg_item *item;
4289
4290         if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
4291                 return -EMSGSIZE;
4292
4293         item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
4294         if (!item)
4295                 return -ENOMEM;
4296
4297         item->nla_type = NLA_NUL_STRING;
4298         item->len = strlen(name) + 1;
4299         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
4300         memcpy(&item->value, name, item->len);
4301         list_add_tail(&item->list, &fmsg->item_list);
4302
4303         return 0;
4304 }
4305
4306 int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
4307 {
4308         int err;
4309
4310         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
4311         if (err)
4312                 return err;
4313
4314         err = devlink_fmsg_put_name(fmsg, name);
4315         if (err)
4316                 return err;
4317
4318         return 0;
4319 }
4320 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
4321
4322 int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
4323 {
4324         return devlink_fmsg_nest_end(fmsg);
4325 }
4326 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
4327
4328 int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
4329                                      const char *name)
4330 {
4331         int err;
4332
4333         err = devlink_fmsg_pair_nest_start(fmsg, name);
4334         if (err)
4335                 return err;
4336
4337         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
4338         if (err)
4339                 return err;
4340
4341         return 0;
4342 }
4343 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
4344
4345 int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
4346 {
4347         int err;
4348
4349         err = devlink_fmsg_nest_end(fmsg);
4350         if (err)
4351                 return err;
4352
4353         err = devlink_fmsg_nest_end(fmsg);
4354         if (err)
4355                 return err;
4356
4357         return 0;
4358 }
4359 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
4360
4361 static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
4362                                   const void *value, u16 value_len,
4363                                   u8 value_nla_type)
4364 {
4365         struct devlink_fmsg_item *item;
4366
4367         if (value_len > DEVLINK_FMSG_MAX_SIZE)
4368                 return -EMSGSIZE;
4369
4370         item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
4371         if (!item)
4372                 return -ENOMEM;
4373
4374         item->nla_type = value_nla_type;
4375         item->len = value_len;
4376         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4377         memcpy(&item->value, value, item->len);
4378         list_add_tail(&item->list, &fmsg->item_list);
4379
4380         return 0;
4381 }
4382
4383 int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
4384 {
4385         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
4386 }
4387 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
4388
4389 int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
4390 {
4391         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
4392 }
4393 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
4394
4395 int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
4396 {
4397         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
4398 }
4399 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
4400
4401 int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
4402 {
4403         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
4404 }
4405 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
4406
4407 int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
4408 {
4409         return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
4410                                       NLA_NUL_STRING);
4411 }
4412 EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
4413
4414 int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
4415                             u16 value_len)
4416 {
4417         return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
4418 }
4419 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
4420
4421 int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
4422                                bool value)
4423 {
4424         int err;
4425
4426         err = devlink_fmsg_pair_nest_start(fmsg, name);
4427         if (err)
4428                 return err;
4429
4430         err = devlink_fmsg_bool_put(fmsg, value);
4431         if (err)
4432                 return err;
4433
4434         err = devlink_fmsg_pair_nest_end(fmsg);
4435         if (err)
4436                 return err;
4437
4438         return 0;
4439 }
4440 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
4441
4442 int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
4443                              u8 value)
4444 {
4445         int err;
4446
4447         err = devlink_fmsg_pair_nest_start(fmsg, name);
4448         if (err)
4449                 return err;
4450
4451         err = devlink_fmsg_u8_put(fmsg, value);
4452         if (err)
4453                 return err;
4454
4455         err = devlink_fmsg_pair_nest_end(fmsg);
4456         if (err)
4457                 return err;
4458
4459         return 0;
4460 }
4461 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
4462
4463 int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
4464                               u32 value)
4465 {
4466         int err;
4467
4468         err = devlink_fmsg_pair_nest_start(fmsg, name);
4469         if (err)
4470                 return err;
4471
4472         err = devlink_fmsg_u32_put(fmsg, value);
4473         if (err)
4474                 return err;
4475
4476         err = devlink_fmsg_pair_nest_end(fmsg);
4477         if (err)
4478                 return err;
4479
4480         return 0;
4481 }
4482 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
4483
4484 int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
4485                               u64 value)
4486 {
4487         int err;
4488
4489         err = devlink_fmsg_pair_nest_start(fmsg, name);
4490         if (err)
4491                 return err;
4492
4493         err = devlink_fmsg_u64_put(fmsg, value);
4494         if (err)
4495                 return err;
4496
4497         err = devlink_fmsg_pair_nest_end(fmsg);
4498         if (err)
4499                 return err;
4500
4501         return 0;
4502 }
4503 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
4504
4505 int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
4506                                  const char *value)
4507 {
4508         int err;
4509
4510         err = devlink_fmsg_pair_nest_start(fmsg, name);
4511         if (err)
4512                 return err;
4513
4514         err = devlink_fmsg_string_put(fmsg, value);
4515         if (err)
4516                 return err;
4517
4518         err = devlink_fmsg_pair_nest_end(fmsg);
4519         if (err)
4520                 return err;
4521
4522         return 0;
4523 }
4524 EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
4525
4526 int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
4527                                  const void *value, u16 value_len)
4528 {
4529         int err;
4530
4531         err = devlink_fmsg_pair_nest_start(fmsg, name);
4532         if (err)
4533                 return err;
4534
4535         err = devlink_fmsg_binary_put(fmsg, value, value_len);
4536         if (err)
4537                 return err;
4538
4539         err = devlink_fmsg_pair_nest_end(fmsg);
4540         if (err)
4541                 return err;
4542
4543         return 0;
4544 }
4545 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
4546
4547 static int
4548 devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4549 {
4550         switch (msg->nla_type) {
4551         case NLA_FLAG:
4552         case NLA_U8:
4553         case NLA_U32:
4554         case NLA_U64:
4555         case NLA_NUL_STRING:
4556         case NLA_BINARY:
4557                 return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
4558                                   msg->nla_type);
4559         default:
4560                 return -EINVAL;
4561         }
4562 }
4563
4564 static int
4565 devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4566 {
4567         int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4568         u8 tmp;
4569
4570         switch (msg->nla_type) {
4571         case NLA_FLAG:
4572                 /* Always provide flag data, regardless of its value */
4573                 tmp = *(bool *) msg->value;
4574
4575                 return nla_put_u8(skb, attrtype, tmp);
4576         case NLA_U8:
4577                 return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
4578         case NLA_U32:
4579                 return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
4580         case NLA_U64:
4581                 return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
4582                                          DEVLINK_ATTR_PAD);
4583         case NLA_NUL_STRING:
4584                 return nla_put_string(skb, attrtype, (char *) &msg->value);
4585         case NLA_BINARY:
4586                 return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
4587         default:
4588                 return -EINVAL;
4589         }
4590 }
4591
4592 static int
4593 devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4594                          int *start)
4595 {
4596         struct devlink_fmsg_item *item;
4597         struct nlattr *fmsg_nlattr;
4598         int i = 0;
4599         int err;
4600
4601         fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
4602         if (!fmsg_nlattr)
4603                 return -EMSGSIZE;
4604
4605         list_for_each_entry(item, &fmsg->item_list, list) {
4606                 if (i < *start) {
4607                         i++;
4608                         continue;
4609                 }
4610
4611                 switch (item->attrtype) {
4612                 case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
4613                 case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
4614                 case DEVLINK_ATTR_FMSG_ARR_NEST_START:
4615                 case DEVLINK_ATTR_FMSG_NEST_END:
4616                         err = nla_put_flag(skb, item->attrtype);
4617                         break;
4618                 case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
4619                         err = devlink_fmsg_item_fill_type(item, skb);
4620                         if (err)
4621                                 break;
4622                         err = devlink_fmsg_item_fill_data(item, skb);
4623                         break;
4624                 case DEVLINK_ATTR_FMSG_OBJ_NAME:
4625                         err = nla_put_string(skb, item->attrtype,
4626                                              (char *) &item->value);
4627                         break;
4628                 default:
4629                         err = -EINVAL;
4630                         break;
4631                 }
4632                 if (!err)
4633                         *start = ++i;
4634                 else
4635                         break;
4636         }
4637
4638         nla_nest_end(skb, fmsg_nlattr);
4639         return err;
4640 }
4641
4642 static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
4643                             struct genl_info *info,
4644                             enum devlink_command cmd, int flags)
4645 {
4646         struct nlmsghdr *nlh;
4647         struct sk_buff *skb;
4648         bool last = false;
4649         int index = 0;
4650         void *hdr;
4651         int err;
4652
4653         while (!last) {
4654                 int tmp_index = index;
4655
4656                 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4657                 if (!skb)
4658                         return -ENOMEM;
4659
4660                 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
4661                                   &devlink_nl_family, flags | NLM_F_MULTI, cmd);
4662                 if (!hdr) {
4663                         err = -EMSGSIZE;
4664                         goto nla_put_failure;
4665                 }
4666
4667                 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
4668                 if (!err)
4669                         last = true;
4670                 else if (err != -EMSGSIZE || tmp_index == index)
4671                         goto nla_put_failure;
4672
4673                 genlmsg_end(skb, hdr);
4674                 err = genlmsg_reply(skb, info);
4675                 if (err)
4676                         return err;
4677         }
4678
4679         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4680         if (!skb)
4681                 return -ENOMEM;
4682         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
4683                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
4684         if (!nlh) {
4685                 err = -EMSGSIZE;
4686                 goto nla_put_failure;
4687         }
4688
4689         return genlmsg_reply(skb, info);
4690
4691 nla_put_failure:
4692         nlmsg_free(skb);
4693         return err;
4694 }
4695
4696 static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4697                                struct netlink_callback *cb,
4698                                enum devlink_command cmd)
4699 {
4700         int index = cb->args[0];
4701         int tmp_index = index;
4702         void *hdr;
4703         int err;
4704
4705         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
4706                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
4707         if (!hdr) {
4708                 err = -EMSGSIZE;
4709                 goto nla_put_failure;
4710         }
4711
4712         err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
4713         if ((err && err != -EMSGSIZE) || tmp_index == index)
4714                 goto nla_put_failure;
4715
4716         cb->args[0] = index;
4717         genlmsg_end(skb, hdr);
4718         return skb->len;
4719
4720 nla_put_failure:
4721         genlmsg_cancel(skb, hdr);
4722         return err;
4723 }
4724
4725 struct devlink_health_reporter {
4726         struct list_head list;
4727         void *priv;
4728         const struct devlink_health_reporter_ops *ops;
4729         struct devlink *devlink;
4730         struct devlink_fmsg *dump_fmsg;
4731         struct mutex dump_lock; /* lock parallel read/write from dump buffers */
4732         u64 graceful_period;
4733         bool auto_recover;
4734         u8 health_state;
4735         u64 dump_ts;
4736         u64 error_count;
4737         u64 recovery_count;
4738         u64 last_recovery_ts;
4739         refcount_t refcount;
4740 };
4741
4742 void *
4743 devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
4744 {
4745         return reporter->priv;
4746 }
4747 EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
4748
4749 static struct devlink_health_reporter *
4750 devlink_health_reporter_find_by_name(struct devlink *devlink,
4751                                      const char *reporter_name)
4752 {
4753         struct devlink_health_reporter *reporter;
4754
4755         lockdep_assert_held(&devlink->reporters_lock);
4756         list_for_each_entry(reporter, &devlink->reporter_list, list)
4757                 if (!strcmp(reporter->ops->name, reporter_name))
4758                         return reporter;
4759         return NULL;
4760 }
4761
4762 /**
4763  *      devlink_health_reporter_create - create devlink health reporter
4764  *
4765  *      @devlink: devlink
4766  *      @ops: ops
4767  *      @graceful_period: to avoid recovery loops, in msecs
4768  *      @auto_recover: auto recover when error occurs
4769  *      @priv: priv
4770  */
4771 struct devlink_health_reporter *
4772 devlink_health_reporter_create(struct devlink *devlink,
4773                                const struct devlink_health_reporter_ops *ops,
4774                                u64 graceful_period, bool auto_recover,
4775                                void *priv)
4776 {
4777         struct devlink_health_reporter *reporter;
4778
4779         mutex_lock(&devlink->reporters_lock);
4780         if (devlink_health_reporter_find_by_name(devlink, ops->name)) {
4781                 reporter = ERR_PTR(-EEXIST);
4782                 goto unlock;
4783         }
4784
4785         if (WARN_ON(auto_recover && !ops->recover) ||
4786             WARN_ON(graceful_period && !ops->recover)) {
4787                 reporter = ERR_PTR(-EINVAL);
4788                 goto unlock;
4789         }
4790
4791         reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
4792         if (!reporter) {
4793                 reporter = ERR_PTR(-ENOMEM);
4794                 goto unlock;
4795         }
4796
4797         reporter->priv = priv;
4798         reporter->ops = ops;
4799         reporter->devlink = devlink;
4800         reporter->graceful_period = graceful_period;
4801         reporter->auto_recover = auto_recover;
4802         mutex_init(&reporter->dump_lock);
4803         refcount_set(&reporter->refcount, 1);
4804         list_add_tail(&reporter->list, &devlink->reporter_list);
4805 unlock:
4806         mutex_unlock(&devlink->reporters_lock);
4807         return reporter;
4808 }
4809 EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
4810
4811 /**
4812  *      devlink_health_reporter_destroy - destroy devlink health reporter
4813  *
4814  *      @reporter: devlink health reporter to destroy
4815  */
4816 void
4817 devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
4818 {
4819         mutex_lock(&reporter->devlink->reporters_lock);
4820         list_del(&reporter->list);
4821         mutex_unlock(&reporter->devlink->reporters_lock);
4822         while (refcount_read(&reporter->refcount) > 1)
4823                 msleep(100);
4824         mutex_destroy(&reporter->dump_lock);
4825         if (reporter->dump_fmsg)
4826                 devlink_fmsg_free(reporter->dump_fmsg);
4827         kfree(reporter);
4828 }
4829 EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
4830
4831 void
4832 devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
4833                                      enum devlink_health_reporter_state state)
4834 {
4835         if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
4836                     state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
4837                 return;
4838
4839         if (reporter->health_state == state)
4840                 return;
4841
4842         reporter->health_state = state;
4843         trace_devlink_health_reporter_state_update(reporter->devlink,
4844                                                    reporter->ops->name, state);
4845 }
4846 EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
4847
4848 static int
4849 devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
4850                                 void *priv_ctx)
4851 {
4852         int err;
4853
4854         if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
4855                 return 0;
4856
4857         if (!reporter->ops->recover)
4858                 return -EOPNOTSUPP;
4859
4860         err = reporter->ops->recover(reporter, priv_ctx);
4861         if (err)
4862                 return err;
4863
4864         reporter->recovery_count++;
4865         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
4866         reporter->last_recovery_ts = jiffies;
4867
4868         return 0;
4869 }
4870
4871 static void
4872 devlink_health_dump_clear(struct devlink_health_reporter *reporter)
4873 {
4874         if (!reporter->dump_fmsg)
4875                 return;
4876         devlink_fmsg_free(reporter->dump_fmsg);
4877         reporter->dump_fmsg = NULL;
4878 }
4879
4880 static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
4881                                   void *priv_ctx)
4882 {
4883         int err;
4884
4885         if (!reporter->ops->dump)
4886                 return 0;
4887
4888         if (reporter->dump_fmsg)
4889                 return 0;
4890
4891         reporter->dump_fmsg = devlink_fmsg_alloc();
4892         if (!reporter->dump_fmsg) {
4893                 err = -ENOMEM;
4894                 return err;
4895         }
4896
4897         err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
4898         if (err)
4899                 goto dump_err;
4900
4901         err = reporter->ops->dump(reporter, reporter->dump_fmsg,
4902                                   priv_ctx);
4903         if (err)
4904                 goto dump_err;
4905
4906         err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
4907         if (err)
4908                 goto dump_err;
4909
4910         reporter->dump_ts = jiffies;
4911
4912         return 0;
4913
4914 dump_err:
4915         devlink_health_dump_clear(reporter);
4916         return err;
4917 }
4918
4919 int devlink_health_report(struct devlink_health_reporter *reporter,
4920                           const char *msg, void *priv_ctx)
4921 {
4922         enum devlink_health_reporter_state prev_health_state;
4923         struct devlink *devlink = reporter->devlink;
4924
4925         /* write a log message of the current error */
4926         WARN_ON(!msg);
4927         trace_devlink_health_report(devlink, reporter->ops->name, msg);
4928         reporter->error_count++;
4929         prev_health_state = reporter->health_state;
4930         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
4931
4932         /* abort if the previous error wasn't recovered */
4933         if (reporter->auto_recover &&
4934             (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
4935              jiffies - reporter->last_recovery_ts <
4936              msecs_to_jiffies(reporter->graceful_period))) {
4937                 trace_devlink_health_recover_aborted(devlink,
4938                                                      reporter->ops->name,
4939                                                      reporter->health_state,
4940                                                      jiffies -
4941                                                      reporter->last_recovery_ts);
4942                 return -ECANCELED;
4943         }
4944
4945         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
4946
4947         mutex_lock(&reporter->dump_lock);
4948         /* store current dump of current error, for later analysis */
4949         devlink_health_do_dump(reporter, priv_ctx);
4950         mutex_unlock(&reporter->dump_lock);
4951
4952         if (reporter->auto_recover)
4953                 return devlink_health_reporter_recover(reporter, priv_ctx);
4954
4955         return 0;
4956 }
4957 EXPORT_SYMBOL_GPL(devlink_health_report);
4958
4959 static struct devlink_health_reporter *
4960 devlink_health_reporter_get_from_attrs(struct devlink *devlink,
4961                                        struct nlattr **attrs)
4962 {
4963         struct devlink_health_reporter *reporter;
4964         char *reporter_name;
4965
4966         if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
4967                 return NULL;
4968
4969         reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
4970         mutex_lock(&devlink->reporters_lock);
4971         reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
4972         if (reporter)
4973                 refcount_inc(&reporter->refcount);
4974         mutex_unlock(&devlink->reporters_lock);
4975         return reporter;
4976 }
4977
4978 static struct devlink_health_reporter *
4979 devlink_health_reporter_get_from_info(struct devlink *devlink,
4980                                       struct genl_info *info)
4981 {
4982         return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
4983 }
4984
4985 static struct devlink_health_reporter *
4986 devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
4987 {
4988         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
4989         struct devlink_health_reporter *reporter;
4990         struct nlattr **attrs = info->attrs;
4991         struct devlink *devlink;
4992
4993         mutex_lock(&devlink_mutex);
4994         devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
4995         if (IS_ERR(devlink))
4996                 goto unlock;
4997
4998         reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
4999         mutex_unlock(&devlink_mutex);
5000         return reporter;
5001 unlock:
5002         mutex_unlock(&devlink_mutex);
5003         return NULL;
5004 }
5005
5006 static void
5007 devlink_health_reporter_put(struct devlink_health_reporter *reporter)
5008 {
5009         refcount_dec(&reporter->refcount);
5010 }
5011
5012 static int
5013 devlink_nl_health_reporter_fill(struct sk_buff *msg,
5014                                 struct devlink *devlink,
5015                                 struct devlink_health_reporter *reporter,
5016                                 enum devlink_command cmd, u32 portid,
5017                                 u32 seq, int flags)
5018 {
5019         struct nlattr *reporter_attr;
5020         void *hdr;
5021
5022         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5023         if (!hdr)
5024                 return -EMSGSIZE;
5025
5026         if (devlink_nl_put_handle(msg, devlink))
5027                 goto genlmsg_cancel;
5028
5029         reporter_attr = nla_nest_start_noflag(msg,
5030                                               DEVLINK_ATTR_HEALTH_REPORTER);
5031         if (!reporter_attr)
5032                 goto genlmsg_cancel;
5033         if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
5034                            reporter->ops->name))
5035                 goto reporter_nest_cancel;
5036         if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
5037                        reporter->health_state))
5038                 goto reporter_nest_cancel;
5039         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
5040                               reporter->error_count, DEVLINK_ATTR_PAD))
5041                 goto reporter_nest_cancel;
5042         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
5043                               reporter->recovery_count, DEVLINK_ATTR_PAD))
5044                 goto reporter_nest_cancel;
5045         if (reporter->ops->recover &&
5046             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
5047                               reporter->graceful_period,
5048                               DEVLINK_ATTR_PAD))
5049                 goto reporter_nest_cancel;
5050         if (reporter->ops->recover &&
5051             nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
5052                        reporter->auto_recover))
5053                 goto reporter_nest_cancel;
5054         if (reporter->dump_fmsg &&
5055             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
5056                               jiffies_to_msecs(reporter->dump_ts),
5057                               DEVLINK_ATTR_PAD))
5058                 goto reporter_nest_cancel;
5059
5060         nla_nest_end(msg, reporter_attr);
5061         genlmsg_end(msg, hdr);
5062         return 0;
5063
5064 reporter_nest_cancel:
5065         nla_nest_end(msg, reporter_attr);
5066 genlmsg_cancel:
5067         genlmsg_cancel(msg, hdr);
5068         return -EMSGSIZE;
5069 }
5070
5071 static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
5072                                                    struct genl_info *info)
5073 {
5074         struct devlink *devlink = info->user_ptr[0];
5075         struct devlink_health_reporter *reporter;
5076         struct sk_buff *msg;
5077         int err;
5078
5079         reporter = devlink_health_reporter_get_from_info(devlink, info);
5080         if (!reporter)
5081                 return -EINVAL;
5082
5083         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5084         if (!msg) {
5085                 err = -ENOMEM;
5086                 goto out;
5087         }
5088
5089         err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
5090                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
5091                                               info->snd_portid, info->snd_seq,
5092                                               0);
5093         if (err) {
5094                 nlmsg_free(msg);
5095                 goto out;
5096         }
5097
5098         err = genlmsg_reply(msg, info);
5099 out:
5100         devlink_health_reporter_put(reporter);
5101         return err;
5102 }
5103
5104 static int
5105 devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
5106                                           struct netlink_callback *cb)
5107 {
5108         struct devlink_health_reporter *reporter;
5109         struct devlink *devlink;
5110         int start = cb->args[0];
5111         int idx = 0;
5112         int err;
5113
5114         mutex_lock(&devlink_mutex);
5115         list_for_each_entry(devlink, &devlink_list, list) {
5116                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5117                         continue;
5118                 mutex_lock(&devlink->reporters_lock);
5119                 list_for_each_entry(reporter, &devlink->reporter_list,
5120                                     list) {
5121                         if (idx < start) {
5122                                 idx++;
5123                                 continue;
5124                         }
5125                         err = devlink_nl_health_reporter_fill(msg, devlink,
5126                                                               reporter,
5127                                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
5128                                                               NETLINK_CB(cb->skb).portid,
5129                                                               cb->nlh->nlmsg_seq,
5130                                                               NLM_F_MULTI);
5131                         if (err) {
5132                                 mutex_unlock(&devlink->reporters_lock);
5133                                 goto out;
5134                         }
5135                         idx++;
5136                 }
5137                 mutex_unlock(&devlink->reporters_lock);
5138         }
5139 out:
5140         mutex_unlock(&devlink_mutex);
5141
5142         cb->args[0] = idx;
5143         return msg->len;
5144 }
5145
5146 static int
5147 devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
5148                                         struct genl_info *info)
5149 {
5150         struct devlink *devlink = info->user_ptr[0];
5151         struct devlink_health_reporter *reporter;
5152         int err;
5153
5154         reporter = devlink_health_reporter_get_from_info(devlink, info);
5155         if (!reporter)
5156                 return -EINVAL;
5157
5158         if (!reporter->ops->recover &&
5159             (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
5160              info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])) {
5161                 err = -EOPNOTSUPP;
5162                 goto out;
5163         }
5164
5165         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
5166                 reporter->graceful_period =
5167                         nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
5168
5169         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
5170                 reporter->auto_recover =
5171                         nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
5172
5173         devlink_health_reporter_put(reporter);
5174         return 0;
5175 out:
5176         devlink_health_reporter_put(reporter);
5177         return err;
5178 }
5179
5180 static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
5181                                                        struct genl_info *info)
5182 {
5183         struct devlink *devlink = info->user_ptr[0];
5184         struct devlink_health_reporter *reporter;
5185         int err;
5186
5187         reporter = devlink_health_reporter_get_from_info(devlink, info);
5188         if (!reporter)
5189                 return -EINVAL;
5190
5191         err = devlink_health_reporter_recover(reporter, NULL);
5192
5193         devlink_health_reporter_put(reporter);
5194         return err;
5195 }
5196
5197 static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
5198                                                         struct genl_info *info)
5199 {
5200         struct devlink *devlink = info->user_ptr[0];
5201         struct devlink_health_reporter *reporter;
5202         struct devlink_fmsg *fmsg;
5203         int err;
5204
5205         reporter = devlink_health_reporter_get_from_info(devlink, info);
5206         if (!reporter)
5207                 return -EINVAL;
5208
5209         if (!reporter->ops->diagnose) {
5210                 devlink_health_reporter_put(reporter);
5211                 return -EOPNOTSUPP;
5212         }
5213
5214         fmsg = devlink_fmsg_alloc();
5215         if (!fmsg) {
5216                 devlink_health_reporter_put(reporter);
5217                 return -ENOMEM;
5218         }
5219
5220         err = devlink_fmsg_obj_nest_start(fmsg);
5221         if (err)
5222                 goto out;
5223
5224         err = reporter->ops->diagnose(reporter, fmsg);
5225         if (err)
5226                 goto out;
5227
5228         err = devlink_fmsg_obj_nest_end(fmsg);
5229         if (err)
5230                 goto out;
5231
5232         err = devlink_fmsg_snd(fmsg, info,
5233                                DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
5234
5235 out:
5236         devlink_fmsg_free(fmsg);
5237         devlink_health_reporter_put(reporter);
5238         return err;
5239 }
5240
5241 static int
5242 devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
5243                                                struct netlink_callback *cb)
5244 {
5245         struct devlink_health_reporter *reporter;
5246         u64 start = cb->args[0];
5247         int err;
5248
5249         reporter = devlink_health_reporter_get_from_cb(cb);
5250         if (!reporter)
5251                 return -EINVAL;
5252
5253         if (!reporter->ops->dump) {
5254                 err = -EOPNOTSUPP;
5255                 goto out;
5256         }
5257         mutex_lock(&reporter->dump_lock);
5258         if (!start) {
5259                 err = devlink_health_do_dump(reporter, NULL);
5260                 if (err)
5261                         goto unlock;
5262                 cb->args[1] = reporter->dump_ts;
5263         }
5264         if (!reporter->dump_fmsg || cb->args[1] != reporter->dump_ts) {
5265                 NL_SET_ERR_MSG_MOD(cb->extack, "Dump trampled, please retry");
5266                 err = -EAGAIN;
5267                 goto unlock;
5268         }
5269
5270         err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
5271                                   DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
5272 unlock:
5273         mutex_unlock(&reporter->dump_lock);
5274 out:
5275         devlink_health_reporter_put(reporter);
5276         return err;
5277 }
5278
5279 static int
5280 devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
5281                                                struct genl_info *info)
5282 {
5283         struct devlink *devlink = info->user_ptr[0];
5284         struct devlink_health_reporter *reporter;
5285
5286         reporter = devlink_health_reporter_get_from_info(devlink, info);
5287         if (!reporter)
5288                 return -EINVAL;
5289
5290         if (!reporter->ops->dump) {
5291                 devlink_health_reporter_put(reporter);
5292                 return -EOPNOTSUPP;
5293         }
5294
5295         mutex_lock(&reporter->dump_lock);
5296         devlink_health_dump_clear(reporter);
5297         mutex_unlock(&reporter->dump_lock);
5298         devlink_health_reporter_put(reporter);
5299         return 0;
5300 }
5301
5302 struct devlink_stats {
5303         u64 rx_bytes;
5304         u64 rx_packets;
5305         struct u64_stats_sync syncp;
5306 };
5307
5308 /**
5309  * struct devlink_trap_group_item - Packet trap group attributes.
5310  * @group: Immutable packet trap group attributes.
5311  * @refcount: Number of trap items using the group.
5312  * @list: trap_group_list member.
5313  * @stats: Trap group statistics.
5314  *
5315  * Describes packet trap group attributes. Created by devlink during trap
5316  * registration.
5317  */
5318 struct devlink_trap_group_item {
5319         const struct devlink_trap_group *group;
5320         refcount_t refcount;
5321         struct list_head list;
5322         struct devlink_stats __percpu *stats;
5323 };
5324
5325 /**
5326  * struct devlink_trap_item - Packet trap attributes.
5327  * @trap: Immutable packet trap attributes.
5328  * @group_item: Associated group item.
5329  * @list: trap_list member.
5330  * @action: Trap action.
5331  * @stats: Trap statistics.
5332  * @priv: Driver private information.
5333  *
5334  * Describes both mutable and immutable packet trap attributes. Created by
5335  * devlink during trap registration and used for all trap related operations.
5336  */
5337 struct devlink_trap_item {
5338         const struct devlink_trap *trap;
5339         struct devlink_trap_group_item *group_item;
5340         struct list_head list;
5341         enum devlink_trap_action action;
5342         struct devlink_stats __percpu *stats;
5343         void *priv;
5344 };
5345
5346 static struct devlink_trap_item *
5347 devlink_trap_item_lookup(struct devlink *devlink, const char *name)
5348 {
5349         struct devlink_trap_item *trap_item;
5350
5351         list_for_each_entry(trap_item, &devlink->trap_list, list) {
5352                 if (!strcmp(trap_item->trap->name, name))
5353                         return trap_item;
5354         }
5355
5356         return NULL;
5357 }
5358
5359 static struct devlink_trap_item *
5360 devlink_trap_item_get_from_info(struct devlink *devlink,
5361                                 struct genl_info *info)
5362 {
5363         struct nlattr *attr;
5364
5365         if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
5366                 return NULL;
5367         attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
5368
5369         return devlink_trap_item_lookup(devlink, nla_data(attr));
5370 }
5371
5372 static int
5373 devlink_trap_action_get_from_info(struct genl_info *info,
5374                                   enum devlink_trap_action *p_trap_action)
5375 {
5376         u8 val;
5377
5378         val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
5379         switch (val) {
5380         case DEVLINK_TRAP_ACTION_DROP: /* fall-through */
5381         case DEVLINK_TRAP_ACTION_TRAP:
5382                 *p_trap_action = val;
5383                 break;
5384         default:
5385                 return -EINVAL;
5386         }
5387
5388         return 0;
5389 }
5390
5391 static int devlink_trap_metadata_put(struct sk_buff *msg,
5392                                      const struct devlink_trap *trap)
5393 {
5394         struct nlattr *attr;
5395
5396         attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
5397         if (!attr)
5398                 return -EMSGSIZE;
5399
5400         if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
5401             nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
5402                 goto nla_put_failure;
5403
5404         nla_nest_end(msg, attr);
5405
5406         return 0;
5407
5408 nla_put_failure:
5409         nla_nest_cancel(msg, attr);
5410         return -EMSGSIZE;
5411 }
5412
5413 static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
5414                                     struct devlink_stats *stats)
5415 {
5416         int i;
5417
5418         memset(stats, 0, sizeof(*stats));
5419         for_each_possible_cpu(i) {
5420                 struct devlink_stats *cpu_stats;
5421                 u64 rx_packets, rx_bytes;
5422                 unsigned int start;
5423
5424                 cpu_stats = per_cpu_ptr(trap_stats, i);
5425                 do {
5426                         start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
5427                         rx_packets = cpu_stats->rx_packets;
5428                         rx_bytes = cpu_stats->rx_bytes;
5429                 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
5430
5431                 stats->rx_packets += rx_packets;
5432                 stats->rx_bytes += rx_bytes;
5433         }
5434 }
5435
5436 static int devlink_trap_stats_put(struct sk_buff *msg,
5437                                   struct devlink_stats __percpu *trap_stats)
5438 {
5439         struct devlink_stats stats;
5440         struct nlattr *attr;
5441
5442         devlink_trap_stats_read(trap_stats, &stats);
5443
5444         attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
5445         if (!attr)
5446                 return -EMSGSIZE;
5447
5448         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
5449                               stats.rx_packets, DEVLINK_ATTR_PAD))
5450                 goto nla_put_failure;
5451
5452         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
5453                               stats.rx_bytes, DEVLINK_ATTR_PAD))
5454                 goto nla_put_failure;
5455
5456         nla_nest_end(msg, attr);
5457
5458         return 0;
5459
5460 nla_put_failure:
5461         nla_nest_cancel(msg, attr);
5462         return -EMSGSIZE;
5463 }
5464
5465 static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
5466                                 const struct devlink_trap_item *trap_item,
5467                                 enum devlink_command cmd, u32 portid, u32 seq,
5468                                 int flags)
5469 {
5470         struct devlink_trap_group_item *group_item = trap_item->group_item;
5471         void *hdr;
5472         int err;
5473
5474         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5475         if (!hdr)
5476                 return -EMSGSIZE;
5477
5478         if (devlink_nl_put_handle(msg, devlink))
5479                 goto nla_put_failure;
5480
5481         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5482                            group_item->group->name))
5483                 goto nla_put_failure;
5484
5485         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
5486                 goto nla_put_failure;
5487
5488         if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
5489                 goto nla_put_failure;
5490
5491         if (trap_item->trap->generic &&
5492             nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5493                 goto nla_put_failure;
5494
5495         if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
5496                 goto nla_put_failure;
5497
5498         err = devlink_trap_metadata_put(msg, trap_item->trap);
5499         if (err)
5500                 goto nla_put_failure;
5501
5502         err = devlink_trap_stats_put(msg, trap_item->stats);
5503         if (err)
5504                 goto nla_put_failure;
5505
5506         genlmsg_end(msg, hdr);
5507
5508         return 0;
5509
5510 nla_put_failure:
5511         genlmsg_cancel(msg, hdr);
5512         return -EMSGSIZE;
5513 }
5514
5515 static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb,
5516                                         struct genl_info *info)
5517 {
5518         struct netlink_ext_ack *extack = info->extack;
5519         struct devlink *devlink = info->user_ptr[0];
5520         struct devlink_trap_item *trap_item;
5521         struct sk_buff *msg;
5522         int err;
5523
5524         if (list_empty(&devlink->trap_list))
5525                 return -EOPNOTSUPP;
5526
5527         trap_item = devlink_trap_item_get_from_info(devlink, info);
5528         if (!trap_item) {
5529                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
5530                 return -ENOENT;
5531         }
5532
5533         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5534         if (!msg)
5535                 return -ENOMEM;
5536
5537         err = devlink_nl_trap_fill(msg, devlink, trap_item,
5538                                    DEVLINK_CMD_TRAP_NEW, info->snd_portid,
5539                                    info->snd_seq, 0);
5540         if (err)
5541                 goto err_trap_fill;
5542
5543         return genlmsg_reply(msg, info);
5544
5545 err_trap_fill:
5546         nlmsg_free(msg);
5547         return err;
5548 }
5549
5550 static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
5551                                           struct netlink_callback *cb)
5552 {
5553         struct devlink_trap_item *trap_item;
5554         struct devlink *devlink;
5555         int start = cb->args[0];
5556         int idx = 0;
5557         int err;
5558
5559         mutex_lock(&devlink_mutex);
5560         list_for_each_entry(devlink, &devlink_list, list) {
5561                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5562                         continue;
5563                 mutex_lock(&devlink->lock);
5564                 list_for_each_entry(trap_item, &devlink->trap_list, list) {
5565                         if (idx < start) {
5566                                 idx++;
5567                                 continue;
5568                         }
5569                         err = devlink_nl_trap_fill(msg, devlink, trap_item,
5570                                                    DEVLINK_CMD_TRAP_NEW,
5571                                                    NETLINK_CB(cb->skb).portid,
5572                                                    cb->nlh->nlmsg_seq,
5573                                                    NLM_F_MULTI);
5574                         if (err) {
5575                                 mutex_unlock(&devlink->lock);
5576                                 goto out;
5577                         }
5578                         idx++;
5579                 }
5580                 mutex_unlock(&devlink->lock);
5581         }
5582 out:
5583         mutex_unlock(&devlink_mutex);
5584
5585         cb->args[0] = idx;
5586         return msg->len;
5587 }
5588
5589 static int __devlink_trap_action_set(struct devlink *devlink,
5590                                      struct devlink_trap_item *trap_item,
5591                                      enum devlink_trap_action trap_action,
5592                                      struct netlink_ext_ack *extack)
5593 {
5594         int err;
5595
5596         if (trap_item->action != trap_action &&
5597             trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
5598                 NL_SET_ERR_MSG_MOD(extack, "Cannot change action of non-drop traps. Skipping");
5599                 return 0;
5600         }
5601
5602         err = devlink->ops->trap_action_set(devlink, trap_item->trap,
5603                                             trap_action);
5604         if (err)
5605                 return err;
5606
5607         trap_item->action = trap_action;
5608
5609         return 0;
5610 }
5611
5612 static int devlink_trap_action_set(struct devlink *devlink,
5613                                    struct devlink_trap_item *trap_item,
5614                                    struct genl_info *info)
5615 {
5616         enum devlink_trap_action trap_action;
5617         int err;
5618
5619         if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
5620                 return 0;
5621
5622         err = devlink_trap_action_get_from_info(info, &trap_action);
5623         if (err) {
5624                 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
5625                 return -EINVAL;
5626         }
5627
5628         return __devlink_trap_action_set(devlink, trap_item, trap_action,
5629                                          info->extack);
5630 }
5631
5632 static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb,
5633                                         struct genl_info *info)
5634 {
5635         struct netlink_ext_ack *extack = info->extack;
5636         struct devlink *devlink = info->user_ptr[0];
5637         struct devlink_trap_item *trap_item;
5638         int err;
5639
5640         if (list_empty(&devlink->trap_list))
5641                 return -EOPNOTSUPP;
5642
5643         trap_item = devlink_trap_item_get_from_info(devlink, info);
5644         if (!trap_item) {
5645                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
5646                 return -ENOENT;
5647         }
5648
5649         err = devlink_trap_action_set(devlink, trap_item, info);
5650         if (err)
5651                 return err;
5652
5653         return 0;
5654 }
5655
5656 static struct devlink_trap_group_item *
5657 devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
5658 {
5659         struct devlink_trap_group_item *group_item;
5660
5661         list_for_each_entry(group_item, &devlink->trap_group_list, list) {
5662                 if (!strcmp(group_item->group->name, name))
5663                         return group_item;
5664         }
5665
5666         return NULL;
5667 }
5668
5669 static struct devlink_trap_group_item *
5670 devlink_trap_group_item_get_from_info(struct devlink *devlink,
5671                                       struct genl_info *info)
5672 {
5673         char *name;
5674
5675         if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
5676                 return NULL;
5677         name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
5678
5679         return devlink_trap_group_item_lookup(devlink, name);
5680 }
5681
5682 static int
5683 devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
5684                            const struct devlink_trap_group_item *group_item,
5685                            enum devlink_command cmd, u32 portid, u32 seq,
5686                            int flags)
5687 {
5688         void *hdr;
5689         int err;
5690
5691         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5692         if (!hdr)
5693                 return -EMSGSIZE;
5694
5695         if (devlink_nl_put_handle(msg, devlink))
5696                 goto nla_put_failure;
5697
5698         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5699                            group_item->group->name))
5700                 goto nla_put_failure;
5701
5702         if (group_item->group->generic &&
5703             nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5704                 goto nla_put_failure;
5705
5706         err = devlink_trap_stats_put(msg, group_item->stats);
5707         if (err)
5708                 goto nla_put_failure;
5709
5710         genlmsg_end(msg, hdr);
5711
5712         return 0;
5713
5714 nla_put_failure:
5715         genlmsg_cancel(msg, hdr);
5716         return -EMSGSIZE;
5717 }
5718
5719 static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb,
5720                                               struct genl_info *info)
5721 {
5722         struct netlink_ext_ack *extack = info->extack;
5723         struct devlink *devlink = info->user_ptr[0];
5724         struct devlink_trap_group_item *group_item;
5725         struct sk_buff *msg;
5726         int err;
5727
5728         if (list_empty(&devlink->trap_group_list))
5729                 return -EOPNOTSUPP;
5730
5731         group_item = devlink_trap_group_item_get_from_info(devlink, info);
5732         if (!group_item) {
5733                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
5734                 return -ENOENT;
5735         }
5736
5737         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5738         if (!msg)
5739                 return -ENOMEM;
5740
5741         err = devlink_nl_trap_group_fill(msg, devlink, group_item,
5742                                          DEVLINK_CMD_TRAP_GROUP_NEW,
5743                                          info->snd_portid, info->snd_seq, 0);
5744         if (err)
5745                 goto err_trap_group_fill;
5746
5747         return genlmsg_reply(msg, info);
5748
5749 err_trap_group_fill:
5750         nlmsg_free(msg);
5751         return err;
5752 }
5753
5754 static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
5755                                                 struct netlink_callback *cb)
5756 {
5757         enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW;
5758         struct devlink_trap_group_item *group_item;
5759         u32 portid = NETLINK_CB(cb->skb).portid;
5760         struct devlink *devlink;
5761         int start = cb->args[0];
5762         int idx = 0;
5763         int err;
5764
5765         mutex_lock(&devlink_mutex);
5766         list_for_each_entry(devlink, &devlink_list, list) {
5767                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5768                         continue;
5769                 mutex_lock(&devlink->lock);
5770                 list_for_each_entry(group_item, &devlink->trap_group_list,
5771                                     list) {
5772                         if (idx < start) {
5773                                 idx++;
5774                                 continue;
5775                         }
5776                         err = devlink_nl_trap_group_fill(msg, devlink,
5777                                                          group_item, cmd,
5778                                                          portid,
5779                                                          cb->nlh->nlmsg_seq,
5780                                                          NLM_F_MULTI);
5781                         if (err) {
5782                                 mutex_unlock(&devlink->lock);
5783                                 goto out;
5784                         }
5785                         idx++;
5786                 }
5787                 mutex_unlock(&devlink->lock);
5788         }
5789 out:
5790         mutex_unlock(&devlink_mutex);
5791
5792         cb->args[0] = idx;
5793         return msg->len;
5794 }
5795
5796 static int
5797 __devlink_trap_group_action_set(struct devlink *devlink,
5798                                 struct devlink_trap_group_item *group_item,
5799                                 enum devlink_trap_action trap_action,
5800                                 struct netlink_ext_ack *extack)
5801 {
5802         const char *group_name = group_item->group->name;
5803         struct devlink_trap_item *trap_item;
5804         int err;
5805
5806         list_for_each_entry(trap_item, &devlink->trap_list, list) {
5807                 if (strcmp(trap_item->trap->group.name, group_name))
5808                         continue;
5809                 err = __devlink_trap_action_set(devlink, trap_item,
5810                                                 trap_action, extack);
5811                 if (err)
5812                         return err;
5813         }
5814
5815         return 0;
5816 }
5817
5818 static int
5819 devlink_trap_group_action_set(struct devlink *devlink,
5820                               struct devlink_trap_group_item *group_item,
5821                               struct genl_info *info)
5822 {
5823         enum devlink_trap_action trap_action;
5824         int err;
5825
5826         if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
5827                 return 0;
5828
5829         err = devlink_trap_action_get_from_info(info, &trap_action);
5830         if (err) {
5831                 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
5832                 return -EINVAL;
5833         }
5834
5835         err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
5836                                               info->extack);
5837         if (err)
5838                 return err;
5839
5840         return 0;
5841 }
5842
5843 static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
5844                                               struct genl_info *info)
5845 {
5846         struct netlink_ext_ack *extack = info->extack;
5847         struct devlink *devlink = info->user_ptr[0];
5848         struct devlink_trap_group_item *group_item;
5849         int err;
5850
5851         if (list_empty(&devlink->trap_group_list))
5852                 return -EOPNOTSUPP;
5853
5854         group_item = devlink_trap_group_item_get_from_info(devlink, info);
5855         if (!group_item) {
5856                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
5857                 return -ENOENT;
5858         }
5859
5860         err = devlink_trap_group_action_set(devlink, group_item, info);
5861         if (err)
5862                 return err;
5863
5864         return 0;
5865 }
5866
5867 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
5868         [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
5869         [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
5870         [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
5871         [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
5872         [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
5873         [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
5874         [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
5875         [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
5876         [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
5877         [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
5878         [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
5879         [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
5880         [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
5881         [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
5882         [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
5883         [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
5884         [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
5885         [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
5886         [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
5887         [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
5888         [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
5889         [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
5890         [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
5891         [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
5892         [DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },
5893         [DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },
5894         [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
5895         [DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
5896         [DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
5897         [DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING },
5898         [DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 },
5899         [DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING },
5900         [DEVLINK_ATTR_NETNS_PID] = { .type = NLA_U32 },
5901         [DEVLINK_ATTR_NETNS_FD] = { .type = NLA_U32 },
5902         [DEVLINK_ATTR_NETNS_ID] = { .type = NLA_U32 },
5903 };
5904
5905 static const struct genl_ops devlink_nl_ops[] = {
5906         {
5907                 .cmd = DEVLINK_CMD_GET,
5908                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5909                 .doit = devlink_nl_cmd_get_doit,
5910                 .dumpit = devlink_nl_cmd_get_dumpit,
5911                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5912                 /* can be retrieved by unprivileged users */
5913         },
5914         {
5915                 .cmd = DEVLINK_CMD_PORT_GET,
5916                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5917                 .doit = devlink_nl_cmd_port_get_doit,
5918                 .dumpit = devlink_nl_cmd_port_get_dumpit,
5919                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5920                 /* can be retrieved by unprivileged users */
5921         },
5922         {
5923                 .cmd = DEVLINK_CMD_PORT_SET,
5924                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5925                 .doit = devlink_nl_cmd_port_set_doit,
5926                 .flags = GENL_ADMIN_PERM,
5927                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5928         },
5929         {
5930                 .cmd = DEVLINK_CMD_PORT_SPLIT,
5931                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5932                 .doit = devlink_nl_cmd_port_split_doit,
5933                 .flags = GENL_ADMIN_PERM,
5934                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5935                                   DEVLINK_NL_FLAG_NO_LOCK,
5936         },
5937         {
5938                 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
5939                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5940                 .doit = devlink_nl_cmd_port_unsplit_doit,
5941                 .flags = GENL_ADMIN_PERM,
5942                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5943                                   DEVLINK_NL_FLAG_NO_LOCK,
5944         },
5945         {
5946                 .cmd = DEVLINK_CMD_SB_GET,
5947                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5948                 .doit = devlink_nl_cmd_sb_get_doit,
5949                 .dumpit = devlink_nl_cmd_sb_get_dumpit,
5950                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5951                                   DEVLINK_NL_FLAG_NEED_SB,
5952                 /* can be retrieved by unprivileged users */
5953         },
5954         {
5955                 .cmd = DEVLINK_CMD_SB_POOL_GET,
5956                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5957                 .doit = devlink_nl_cmd_sb_pool_get_doit,
5958                 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
5959                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5960                                   DEVLINK_NL_FLAG_NEED_SB,
5961                 /* can be retrieved by unprivileged users */
5962         },
5963         {
5964                 .cmd = DEVLINK_CMD_SB_POOL_SET,
5965                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5966                 .doit = devlink_nl_cmd_sb_pool_set_doit,
5967                 .flags = GENL_ADMIN_PERM,
5968                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5969                                   DEVLINK_NL_FLAG_NEED_SB,
5970         },
5971         {
5972                 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
5973                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5974                 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
5975                 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
5976                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5977                                   DEVLINK_NL_FLAG_NEED_SB,
5978                 /* can be retrieved by unprivileged users */
5979         },
5980         {
5981                 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
5982                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5983                 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
5984                 .flags = GENL_ADMIN_PERM,
5985                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5986                                   DEVLINK_NL_FLAG_NEED_SB,
5987         },
5988         {
5989                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
5990                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5991                 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
5992                 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
5993                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5994                                   DEVLINK_NL_FLAG_NEED_SB,
5995                 /* can be retrieved by unprivileged users */
5996         },
5997         {
5998                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
5999                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6000                 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
6001                 .flags = GENL_ADMIN_PERM,
6002                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6003                                   DEVLINK_NL_FLAG_NEED_SB,
6004         },
6005         {
6006                 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
6007                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6008                 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
6009                 .flags = GENL_ADMIN_PERM,
6010                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6011                                   DEVLINK_NL_FLAG_NEED_SB,
6012         },
6013         {
6014                 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
6015                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6016                 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
6017                 .flags = GENL_ADMIN_PERM,
6018                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6019                                   DEVLINK_NL_FLAG_NEED_SB,
6020         },
6021         {
6022                 .cmd = DEVLINK_CMD_ESWITCH_GET,
6023                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6024                 .doit = devlink_nl_cmd_eswitch_get_doit,
6025                 .flags = GENL_ADMIN_PERM,
6026                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6027         },
6028         {
6029                 .cmd = DEVLINK_CMD_ESWITCH_SET,
6030                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6031                 .doit = devlink_nl_cmd_eswitch_set_doit,
6032                 .flags = GENL_ADMIN_PERM,
6033                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6034                                   DEVLINK_NL_FLAG_NO_LOCK,
6035         },
6036         {
6037                 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
6038                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6039                 .doit = devlink_nl_cmd_dpipe_table_get,
6040                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6041                 /* can be retrieved by unprivileged users */
6042         },
6043         {
6044                 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
6045                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6046                 .doit = devlink_nl_cmd_dpipe_entries_get,
6047                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6048                 /* can be retrieved by unprivileged users */
6049         },
6050         {
6051                 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
6052                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6053                 .doit = devlink_nl_cmd_dpipe_headers_get,
6054                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6055                 /* can be retrieved by unprivileged users */
6056         },
6057         {
6058                 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
6059                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6060                 .doit = devlink_nl_cmd_dpipe_table_counters_set,
6061                 .flags = GENL_ADMIN_PERM,
6062                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6063         },
6064         {
6065                 .cmd = DEVLINK_CMD_RESOURCE_SET,
6066                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6067                 .doit = devlink_nl_cmd_resource_set,
6068                 .flags = GENL_ADMIN_PERM,
6069                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6070         },
6071         {
6072                 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
6073                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6074                 .doit = devlink_nl_cmd_resource_dump,
6075                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6076                 /* can be retrieved by unprivileged users */
6077         },
6078         {
6079                 .cmd = DEVLINK_CMD_RELOAD,
6080                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6081                 .doit = devlink_nl_cmd_reload,
6082                 .flags = GENL_ADMIN_PERM,
6083                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6084                                   DEVLINK_NL_FLAG_NO_LOCK,
6085         },
6086         {
6087                 .cmd = DEVLINK_CMD_PARAM_GET,
6088                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6089                 .doit = devlink_nl_cmd_param_get_doit,
6090                 .dumpit = devlink_nl_cmd_param_get_dumpit,
6091                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6092                 /* can be retrieved by unprivileged users */
6093         },
6094         {
6095                 .cmd = DEVLINK_CMD_PARAM_SET,
6096                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6097                 .doit = devlink_nl_cmd_param_set_doit,
6098                 .flags = GENL_ADMIN_PERM,
6099                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6100         },
6101         {
6102                 .cmd = DEVLINK_CMD_PORT_PARAM_GET,
6103                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6104                 .doit = devlink_nl_cmd_port_param_get_doit,
6105                 .dumpit = devlink_nl_cmd_port_param_get_dumpit,
6106                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6107                 /* can be retrieved by unprivileged users */
6108         },
6109         {
6110                 .cmd = DEVLINK_CMD_PORT_PARAM_SET,
6111                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6112                 .doit = devlink_nl_cmd_port_param_set_doit,
6113                 .flags = GENL_ADMIN_PERM,
6114                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6115         },
6116         {
6117                 .cmd = DEVLINK_CMD_REGION_GET,
6118                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6119                 .doit = devlink_nl_cmd_region_get_doit,
6120                 .dumpit = devlink_nl_cmd_region_get_dumpit,
6121                 .flags = GENL_ADMIN_PERM,
6122                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6123         },
6124         {
6125                 .cmd = DEVLINK_CMD_REGION_DEL,
6126                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6127                 .doit = devlink_nl_cmd_region_del,
6128                 .flags = GENL_ADMIN_PERM,
6129                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6130         },
6131         {
6132                 .cmd = DEVLINK_CMD_REGION_READ,
6133                 .validate = GENL_DONT_VALIDATE_STRICT |
6134                             GENL_DONT_VALIDATE_DUMP_STRICT,
6135                 .dumpit = devlink_nl_cmd_region_read_dumpit,
6136                 .flags = GENL_ADMIN_PERM,
6137                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6138         },
6139         {
6140                 .cmd = DEVLINK_CMD_INFO_GET,
6141                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6142                 .doit = devlink_nl_cmd_info_get_doit,
6143                 .dumpit = devlink_nl_cmd_info_get_dumpit,
6144                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6145                 /* can be retrieved by unprivileged users */
6146         },
6147         {
6148                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
6149                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6150                 .doit = devlink_nl_cmd_health_reporter_get_doit,
6151                 .dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
6152                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6153                                   DEVLINK_NL_FLAG_NO_LOCK,
6154                 /* can be retrieved by unprivileged users */
6155         },
6156         {
6157                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
6158                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6159                 .doit = devlink_nl_cmd_health_reporter_set_doit,
6160                 .flags = GENL_ADMIN_PERM,
6161                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6162                                   DEVLINK_NL_FLAG_NO_LOCK,
6163         },
6164         {
6165                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
6166                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6167                 .doit = devlink_nl_cmd_health_reporter_recover_doit,
6168                 .flags = GENL_ADMIN_PERM,
6169                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6170                                   DEVLINK_NL_FLAG_NO_LOCK,
6171         },
6172         {
6173                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
6174                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6175                 .doit = devlink_nl_cmd_health_reporter_diagnose_doit,
6176                 .flags = GENL_ADMIN_PERM,
6177                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6178                                   DEVLINK_NL_FLAG_NO_LOCK,
6179         },
6180         {
6181                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
6182                 .validate = GENL_DONT_VALIDATE_STRICT |
6183                             GENL_DONT_VALIDATE_DUMP_STRICT,
6184                 .dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
6185                 .flags = GENL_ADMIN_PERM,
6186                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6187                                   DEVLINK_NL_FLAG_NO_LOCK,
6188         },
6189         {
6190                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
6191                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6192                 .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
6193                 .flags = GENL_ADMIN_PERM,
6194                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6195                                   DEVLINK_NL_FLAG_NO_LOCK,
6196         },
6197         {
6198                 .cmd = DEVLINK_CMD_FLASH_UPDATE,
6199                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6200                 .doit = devlink_nl_cmd_flash_update,
6201                 .flags = GENL_ADMIN_PERM,
6202                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6203         },
6204         {
6205                 .cmd = DEVLINK_CMD_TRAP_GET,
6206                 .doit = devlink_nl_cmd_trap_get_doit,
6207                 .dumpit = devlink_nl_cmd_trap_get_dumpit,
6208                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6209                 /* can be retrieved by unprivileged users */
6210         },
6211         {
6212                 .cmd = DEVLINK_CMD_TRAP_SET,
6213                 .doit = devlink_nl_cmd_trap_set_doit,
6214                 .flags = GENL_ADMIN_PERM,
6215                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6216         },
6217         {
6218                 .cmd = DEVLINK_CMD_TRAP_GROUP_GET,
6219                 .doit = devlink_nl_cmd_trap_group_get_doit,
6220                 .dumpit = devlink_nl_cmd_trap_group_get_dumpit,
6221                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6222                 /* can be retrieved by unprivileged users */
6223         },
6224         {
6225                 .cmd = DEVLINK_CMD_TRAP_GROUP_SET,
6226                 .doit = devlink_nl_cmd_trap_group_set_doit,
6227                 .flags = GENL_ADMIN_PERM,
6228                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6229         },
6230 };
6231
6232 static struct genl_family devlink_nl_family __ro_after_init = {
6233         .name           = DEVLINK_GENL_NAME,
6234         .version        = DEVLINK_GENL_VERSION,
6235         .maxattr        = DEVLINK_ATTR_MAX,
6236         .policy = devlink_nl_policy,
6237         .netnsok        = true,
6238         .pre_doit       = devlink_nl_pre_doit,
6239         .post_doit      = devlink_nl_post_doit,
6240         .module         = THIS_MODULE,
6241         .ops            = devlink_nl_ops,
6242         .n_ops          = ARRAY_SIZE(devlink_nl_ops),
6243         .mcgrps         = devlink_nl_mcgrps,
6244         .n_mcgrps       = ARRAY_SIZE(devlink_nl_mcgrps),
6245 };
6246
6247 /**
6248  *      devlink_alloc - Allocate new devlink instance resources
6249  *
6250  *      @ops: ops
6251  *      @priv_size: size of user private data
6252  *
6253  *      Allocate new devlink instance resources, including devlink index
6254  *      and name.
6255  */
6256 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
6257 {
6258         struct devlink *devlink;
6259
6260         if (WARN_ON(!ops))
6261                 return NULL;
6262
6263         devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
6264         if (!devlink)
6265                 return NULL;
6266         devlink->ops = ops;
6267         __devlink_net_set(devlink, &init_net);
6268         INIT_LIST_HEAD(&devlink->port_list);
6269         INIT_LIST_HEAD(&devlink->sb_list);
6270         INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
6271         INIT_LIST_HEAD(&devlink->resource_list);
6272         INIT_LIST_HEAD(&devlink->param_list);
6273         INIT_LIST_HEAD(&devlink->region_list);
6274         INIT_LIST_HEAD(&devlink->reporter_list);
6275         INIT_LIST_HEAD(&devlink->trap_list);
6276         INIT_LIST_HEAD(&devlink->trap_group_list);
6277         mutex_init(&devlink->lock);
6278         mutex_init(&devlink->reporters_lock);
6279         return devlink;
6280 }
6281 EXPORT_SYMBOL_GPL(devlink_alloc);
6282
6283 /**
6284  *      devlink_register - Register devlink instance
6285  *
6286  *      @devlink: devlink
6287  *      @dev: parent device
6288  */
6289 int devlink_register(struct devlink *devlink, struct device *dev)
6290 {
6291         mutex_lock(&devlink_mutex);
6292         devlink->dev = dev;
6293         devlink->registered = true;
6294         list_add_tail(&devlink->list, &devlink_list);
6295         devlink_notify(devlink, DEVLINK_CMD_NEW);
6296         mutex_unlock(&devlink_mutex);
6297         return 0;
6298 }
6299 EXPORT_SYMBOL_GPL(devlink_register);
6300
6301 /**
6302  *      devlink_unregister - Unregister devlink instance
6303  *
6304  *      @devlink: devlink
6305  */
6306 void devlink_unregister(struct devlink *devlink)
6307 {
6308         mutex_lock(&devlink_mutex);
6309         devlink_notify(devlink, DEVLINK_CMD_DEL);
6310         list_del(&devlink->list);
6311         mutex_unlock(&devlink_mutex);
6312 }
6313 EXPORT_SYMBOL_GPL(devlink_unregister);
6314
6315 /**
6316  *      devlink_free - Free devlink instance resources
6317  *
6318  *      @devlink: devlink
6319  */
6320 void devlink_free(struct devlink *devlink)
6321 {
6322         mutex_destroy(&devlink->reporters_lock);
6323         mutex_destroy(&devlink->lock);
6324         WARN_ON(!list_empty(&devlink->trap_group_list));
6325         WARN_ON(!list_empty(&devlink->trap_list));
6326         WARN_ON(!list_empty(&devlink->reporter_list));
6327         WARN_ON(!list_empty(&devlink->region_list));
6328         WARN_ON(!list_empty(&devlink->param_list));
6329         WARN_ON(!list_empty(&devlink->resource_list));
6330         WARN_ON(!list_empty(&devlink->dpipe_table_list));
6331         WARN_ON(!list_empty(&devlink->sb_list));
6332         WARN_ON(!list_empty(&devlink->port_list));
6333
6334         kfree(devlink);
6335 }
6336 EXPORT_SYMBOL_GPL(devlink_free);
6337
6338 static void devlink_port_type_warn(struct work_struct *work)
6339 {
6340         WARN(true, "Type was not set for devlink port.");
6341 }
6342
6343 static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
6344 {
6345         /* Ignore CPU and DSA flavours. */
6346         return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
6347                devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA;
6348 }
6349
6350 #define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 30)
6351
6352 static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
6353 {
6354         if (!devlink_port_type_should_warn(devlink_port))
6355                 return;
6356         /* Schedule a work to WARN in case driver does not set port
6357          * type within timeout.
6358          */
6359         schedule_delayed_work(&devlink_port->type_warn_dw,
6360                               DEVLINK_PORT_TYPE_WARN_TIMEOUT);
6361 }
6362
6363 static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
6364 {
6365         if (!devlink_port_type_should_warn(devlink_port))
6366                 return;
6367         cancel_delayed_work_sync(&devlink_port->type_warn_dw);
6368 }
6369
6370 /**
6371  *      devlink_port_register - Register devlink port
6372  *
6373  *      @devlink: devlink
6374  *      @devlink_port: devlink port
6375  *      @port_index: driver-specific numerical identifier of the port
6376  *
6377  *      Register devlink port with provided port index. User can use
6378  *      any indexing, even hw-related one. devlink_port structure
6379  *      is convenient to be embedded inside user driver private structure.
6380  *      Note that the caller should take care of zeroing the devlink_port
6381  *      structure.
6382  */
6383 int devlink_port_register(struct devlink *devlink,
6384                           struct devlink_port *devlink_port,
6385                           unsigned int port_index)
6386 {
6387         mutex_lock(&devlink->lock);
6388         if (devlink_port_index_exists(devlink, port_index)) {
6389                 mutex_unlock(&devlink->lock);
6390                 return -EEXIST;
6391         }
6392         devlink_port->devlink = devlink;
6393         devlink_port->index = port_index;
6394         devlink_port->registered = true;
6395         spin_lock_init(&devlink_port->type_lock);
6396         list_add_tail(&devlink_port->list, &devlink->port_list);
6397         INIT_LIST_HEAD(&devlink_port->param_list);
6398         mutex_unlock(&devlink->lock);
6399         INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
6400         devlink_port_type_warn_schedule(devlink_port);
6401         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
6402         return 0;
6403 }
6404 EXPORT_SYMBOL_GPL(devlink_port_register);
6405
6406 /**
6407  *      devlink_port_unregister - Unregister devlink port
6408  *
6409  *      @devlink_port: devlink port
6410  */
6411 void devlink_port_unregister(struct devlink_port *devlink_port)
6412 {
6413         struct devlink *devlink = devlink_port->devlink;
6414
6415         devlink_port_type_warn_cancel(devlink_port);
6416         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
6417         mutex_lock(&devlink->lock);
6418         list_del(&devlink_port->list);
6419         mutex_unlock(&devlink->lock);
6420 }
6421 EXPORT_SYMBOL_GPL(devlink_port_unregister);
6422
6423 static void __devlink_port_type_set(struct devlink_port *devlink_port,
6424                                     enum devlink_port_type type,
6425                                     void *type_dev)
6426 {
6427         if (WARN_ON(!devlink_port->registered))
6428                 return;
6429         devlink_port_type_warn_cancel(devlink_port);
6430         spin_lock_bh(&devlink_port->type_lock);
6431         devlink_port->type = type;
6432         devlink_port->type_dev = type_dev;
6433         spin_unlock_bh(&devlink_port->type_lock);
6434         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
6435 }
6436
6437 /**
6438  *      devlink_port_type_eth_set - Set port type to Ethernet
6439  *
6440  *      @devlink_port: devlink port
6441  *      @netdev: related netdevice
6442  */
6443 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
6444                                struct net_device *netdev)
6445 {
6446         const struct net_device_ops *ops = netdev->netdev_ops;
6447
6448         /* If driver registers devlink port, it should set devlink port
6449          * attributes accordingly so the compat functions are called
6450          * and the original ops are not used.
6451          */
6452         if (ops->ndo_get_phys_port_name) {
6453                 /* Some drivers use the same set of ndos for netdevs
6454                  * that have devlink_port registered and also for
6455                  * those who don't. Make sure that ndo_get_phys_port_name
6456                  * returns -EOPNOTSUPP here in case it is defined.
6457                  * Warn if not.
6458                  */
6459                 char name[IFNAMSIZ];
6460                 int err;
6461
6462                 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
6463                 WARN_ON(err != -EOPNOTSUPP);
6464         }
6465         if (ops->ndo_get_port_parent_id) {
6466                 /* Some drivers use the same set of ndos for netdevs
6467                  * that have devlink_port registered and also for
6468                  * those who don't. Make sure that ndo_get_port_parent_id
6469                  * returns -EOPNOTSUPP here in case it is defined.
6470                  * Warn if not.
6471                  */
6472                 struct netdev_phys_item_id ppid;
6473                 int err;
6474
6475                 err = ops->ndo_get_port_parent_id(netdev, &ppid);
6476                 WARN_ON(err != -EOPNOTSUPP);
6477         }
6478         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, netdev);
6479 }
6480 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
6481
6482 /**
6483  *      devlink_port_type_ib_set - Set port type to InfiniBand
6484  *
6485  *      @devlink_port: devlink port
6486  *      @ibdev: related IB device
6487  */
6488 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
6489                               struct ib_device *ibdev)
6490 {
6491         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
6492 }
6493 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
6494
6495 /**
6496  *      devlink_port_type_clear - Clear port type
6497  *
6498  *      @devlink_port: devlink port
6499  */
6500 void devlink_port_type_clear(struct devlink_port *devlink_port)
6501 {
6502         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
6503         devlink_port_type_warn_schedule(devlink_port);
6504 }
6505 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
6506
6507 static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
6508                                     enum devlink_port_flavour flavour,
6509                                     const unsigned char *switch_id,
6510                                     unsigned char switch_id_len)
6511 {
6512         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6513
6514         if (WARN_ON(devlink_port->registered))
6515                 return -EEXIST;
6516         attrs->set = true;
6517         attrs->flavour = flavour;
6518         if (switch_id) {
6519                 attrs->switch_port = true;
6520                 if (WARN_ON(switch_id_len > MAX_PHYS_ITEM_ID_LEN))
6521                         switch_id_len = MAX_PHYS_ITEM_ID_LEN;
6522                 memcpy(attrs->switch_id.id, switch_id, switch_id_len);
6523                 attrs->switch_id.id_len = switch_id_len;
6524         } else {
6525                 attrs->switch_port = false;
6526         }
6527         return 0;
6528 }
6529
6530 /**
6531  *      devlink_port_attrs_set - Set port attributes
6532  *
6533  *      @devlink_port: devlink port
6534  *      @flavour: flavour of the port
6535  *      @port_number: number of the port that is facing user, for example
6536  *                    the front panel port number
6537  *      @split: indicates if this is split port
6538  *      @split_subport_number: if the port is split, this is the number
6539  *                             of subport.
6540  *      @switch_id: if the port is part of switch, this is buffer with ID,
6541  *                  otwerwise this is NULL
6542  *      @switch_id_len: length of the switch_id buffer
6543  */
6544 void devlink_port_attrs_set(struct devlink_port *devlink_port,
6545                             enum devlink_port_flavour flavour,
6546                             u32 port_number, bool split,
6547                             u32 split_subport_number,
6548                             const unsigned char *switch_id,
6549                             unsigned char switch_id_len)
6550 {
6551         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6552         int ret;
6553
6554         ret = __devlink_port_attrs_set(devlink_port, flavour,
6555                                        switch_id, switch_id_len);
6556         if (ret)
6557                 return;
6558         attrs->split = split;
6559         attrs->phys.port_number = port_number;
6560         attrs->phys.split_subport_number = split_subport_number;
6561 }
6562 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
6563
6564 /**
6565  *      devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
6566  *
6567  *      @devlink_port: devlink port
6568  *      @pf: associated PF for the devlink port instance
6569  *      @switch_id: if the port is part of switch, this is buffer with ID,
6570  *                  otherwise this is NULL
6571  *      @switch_id_len: length of the switch_id buffer
6572  */
6573 void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port,
6574                                    const unsigned char *switch_id,
6575                                    unsigned char switch_id_len, u16 pf)
6576 {
6577         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6578         int ret;
6579
6580         ret = __devlink_port_attrs_set(devlink_port,
6581                                        DEVLINK_PORT_FLAVOUR_PCI_PF,
6582                                        switch_id, switch_id_len);
6583         if (ret)
6584                 return;
6585
6586         attrs->pci_pf.pf = pf;
6587 }
6588 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
6589
6590 /**
6591  *      devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
6592  *
6593  *      @devlink_port: devlink port
6594  *      @pf: associated PF for the devlink port instance
6595  *      @vf: associated VF of a PF for the devlink port instance
6596  *      @switch_id: if the port is part of switch, this is buffer with ID,
6597  *                  otherwise this is NULL
6598  *      @switch_id_len: length of the switch_id buffer
6599  */
6600 void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port,
6601                                    const unsigned char *switch_id,
6602                                    unsigned char switch_id_len,
6603                                    u16 pf, u16 vf)
6604 {
6605         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6606         int ret;
6607
6608         ret = __devlink_port_attrs_set(devlink_port,
6609                                        DEVLINK_PORT_FLAVOUR_PCI_VF,
6610                                        switch_id, switch_id_len);
6611         if (ret)
6612                 return;
6613         attrs->pci_vf.pf = pf;
6614         attrs->pci_vf.vf = vf;
6615 }
6616 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
6617
6618 static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
6619                                              char *name, size_t len)
6620 {
6621         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6622         int n = 0;
6623
6624         if (!attrs->set)
6625                 return -EOPNOTSUPP;
6626
6627         switch (attrs->flavour) {
6628         case DEVLINK_PORT_FLAVOUR_PHYSICAL:
6629                 if (!attrs->split)
6630                         n = snprintf(name, len, "p%u", attrs->phys.port_number);
6631                 else
6632                         n = snprintf(name, len, "p%us%u",
6633                                      attrs->phys.port_number,
6634                                      attrs->phys.split_subport_number);
6635                 break;
6636         case DEVLINK_PORT_FLAVOUR_CPU:
6637         case DEVLINK_PORT_FLAVOUR_DSA:
6638                 /* As CPU and DSA ports do not have a netdevice associated
6639                  * case should not ever happen.
6640                  */
6641                 WARN_ON(1);
6642                 return -EINVAL;
6643         case DEVLINK_PORT_FLAVOUR_PCI_PF:
6644                 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
6645                 break;
6646         case DEVLINK_PORT_FLAVOUR_PCI_VF:
6647                 n = snprintf(name, len, "pf%uvf%u",
6648                              attrs->pci_vf.pf, attrs->pci_vf.vf);
6649                 break;
6650         }
6651
6652         if (n >= len)
6653                 return -EINVAL;
6654
6655         return 0;
6656 }
6657
6658 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
6659                         u32 size, u16 ingress_pools_count,
6660                         u16 egress_pools_count, u16 ingress_tc_count,
6661                         u16 egress_tc_count)
6662 {
6663         struct devlink_sb *devlink_sb;
6664         int err = 0;
6665
6666         mutex_lock(&devlink->lock);
6667         if (devlink_sb_index_exists(devlink, sb_index)) {
6668                 err = -EEXIST;
6669                 goto unlock;
6670         }
6671
6672         devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
6673         if (!devlink_sb) {
6674                 err = -ENOMEM;
6675                 goto unlock;
6676         }
6677         devlink_sb->index = sb_index;
6678         devlink_sb->size = size;
6679         devlink_sb->ingress_pools_count = ingress_pools_count;
6680         devlink_sb->egress_pools_count = egress_pools_count;
6681         devlink_sb->ingress_tc_count = ingress_tc_count;
6682         devlink_sb->egress_tc_count = egress_tc_count;
6683         list_add_tail(&devlink_sb->list, &devlink->sb_list);
6684 unlock:
6685         mutex_unlock(&devlink->lock);
6686         return err;
6687 }
6688 EXPORT_SYMBOL_GPL(devlink_sb_register);
6689
6690 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
6691 {
6692         struct devlink_sb *devlink_sb;
6693
6694         mutex_lock(&devlink->lock);
6695         devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
6696         WARN_ON(!devlink_sb);
6697         list_del(&devlink_sb->list);
6698         mutex_unlock(&devlink->lock);
6699         kfree(devlink_sb);
6700 }
6701 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
6702
6703 /**
6704  *      devlink_dpipe_headers_register - register dpipe headers
6705  *
6706  *      @devlink: devlink
6707  *      @dpipe_headers: dpipe header array
6708  *
6709  *      Register the headers supported by hardware.
6710  */
6711 int devlink_dpipe_headers_register(struct devlink *devlink,
6712                                    struct devlink_dpipe_headers *dpipe_headers)
6713 {
6714         mutex_lock(&devlink->lock);
6715         devlink->dpipe_headers = dpipe_headers;
6716         mutex_unlock(&devlink->lock);
6717         return 0;
6718 }
6719 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
6720
6721 /**
6722  *      devlink_dpipe_headers_unregister - unregister dpipe headers
6723  *
6724  *      @devlink: devlink
6725  *
6726  *      Unregister the headers supported by hardware.
6727  */
6728 void devlink_dpipe_headers_unregister(struct devlink *devlink)
6729 {
6730         mutex_lock(&devlink->lock);
6731         devlink->dpipe_headers = NULL;
6732         mutex_unlock(&devlink->lock);
6733 }
6734 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
6735
6736 /**
6737  *      devlink_dpipe_table_counter_enabled - check if counter allocation
6738  *                                            required
6739  *      @devlink: devlink
6740  *      @table_name: tables name
6741  *
6742  *      Used by driver to check if counter allocation is required.
6743  *      After counter allocation is turned on the table entries
6744  *      are updated to include counter statistics.
6745  *
6746  *      After that point on the driver must respect the counter
6747  *      state so that each entry added to the table is added
6748  *      with a counter.
6749  */
6750 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
6751                                          const char *table_name)
6752 {
6753         struct devlink_dpipe_table *table;
6754         bool enabled;
6755
6756         rcu_read_lock();
6757         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
6758                                          table_name);
6759         enabled = false;
6760         if (table)
6761                 enabled = table->counters_enabled;
6762         rcu_read_unlock();
6763         return enabled;
6764 }
6765 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
6766
6767 /**
6768  *      devlink_dpipe_table_register - register dpipe table
6769  *
6770  *      @devlink: devlink
6771  *      @table_name: table name
6772  *      @table_ops: table ops
6773  *      @priv: priv
6774  *      @counter_control_extern: external control for counters
6775  */
6776 int devlink_dpipe_table_register(struct devlink *devlink,
6777                                  const char *table_name,
6778                                  struct devlink_dpipe_table_ops *table_ops,
6779                                  void *priv, bool counter_control_extern)
6780 {
6781         struct devlink_dpipe_table *table;
6782
6783         if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name))
6784                 return -EEXIST;
6785
6786         if (WARN_ON(!table_ops->size_get))
6787                 return -EINVAL;
6788
6789         table = kzalloc(sizeof(*table), GFP_KERNEL);
6790         if (!table)
6791                 return -ENOMEM;
6792
6793         table->name = table_name;
6794         table->table_ops = table_ops;
6795         table->priv = priv;
6796         table->counter_control_extern = counter_control_extern;
6797
6798         mutex_lock(&devlink->lock);
6799         list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
6800         mutex_unlock(&devlink->lock);
6801         return 0;
6802 }
6803 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
6804
6805 /**
6806  *      devlink_dpipe_table_unregister - unregister dpipe table
6807  *
6808  *      @devlink: devlink
6809  *      @table_name: table name
6810  */
6811 void devlink_dpipe_table_unregister(struct devlink *devlink,
6812                                     const char *table_name)
6813 {
6814         struct devlink_dpipe_table *table;
6815
6816         mutex_lock(&devlink->lock);
6817         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
6818                                          table_name);
6819         if (!table)
6820                 goto unlock;
6821         list_del_rcu(&table->list);
6822         mutex_unlock(&devlink->lock);
6823         kfree_rcu(table, rcu);
6824         return;
6825 unlock:
6826         mutex_unlock(&devlink->lock);
6827 }
6828 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
6829
6830 /**
6831  *      devlink_resource_register - devlink resource register
6832  *
6833  *      @devlink: devlink
6834  *      @resource_name: resource's name
6835  *      @resource_size: resource's size
6836  *      @resource_id: resource's id
6837  *      @parent_resource_id: resource's parent id
6838  *      @size_params: size parameters
6839  */
6840 int devlink_resource_register(struct devlink *devlink,
6841                               const char *resource_name,
6842                               u64 resource_size,
6843                               u64 resource_id,
6844                               u64 parent_resource_id,
6845                               const struct devlink_resource_size_params *size_params)
6846 {
6847         struct devlink_resource *resource;
6848         struct list_head *resource_list;
6849         bool top_hierarchy;
6850         int err = 0;
6851
6852         top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
6853
6854         mutex_lock(&devlink->lock);
6855         resource = devlink_resource_find(devlink, NULL, resource_id);
6856         if (resource) {
6857                 err = -EINVAL;
6858                 goto out;
6859         }
6860
6861         resource = kzalloc(sizeof(*resource), GFP_KERNEL);
6862         if (!resource) {
6863                 err = -ENOMEM;
6864                 goto out;
6865         }
6866
6867         if (top_hierarchy) {
6868                 resource_list = &devlink->resource_list;
6869         } else {
6870                 struct devlink_resource *parent_resource;
6871
6872                 parent_resource = devlink_resource_find(devlink, NULL,
6873                                                         parent_resource_id);
6874                 if (parent_resource) {
6875                         resource_list = &parent_resource->resource_list;
6876                         resource->parent = parent_resource;
6877                 } else {
6878                         kfree(resource);
6879                         err = -EINVAL;
6880                         goto out;
6881                 }
6882         }
6883
6884         resource->name = resource_name;
6885         resource->size = resource_size;
6886         resource->size_new = resource_size;
6887         resource->id = resource_id;
6888         resource->size_valid = true;
6889         memcpy(&resource->size_params, size_params,
6890                sizeof(resource->size_params));
6891         INIT_LIST_HEAD(&resource->resource_list);
6892         list_add_tail(&resource->list, resource_list);
6893 out:
6894         mutex_unlock(&devlink->lock);
6895         return err;
6896 }
6897 EXPORT_SYMBOL_GPL(devlink_resource_register);
6898
6899 /**
6900  *      devlink_resources_unregister - free all resources
6901  *
6902  *      @devlink: devlink
6903  *      @resource: resource
6904  */
6905 void devlink_resources_unregister(struct devlink *devlink,
6906                                   struct devlink_resource *resource)
6907 {
6908         struct devlink_resource *tmp, *child_resource;
6909         struct list_head *resource_list;
6910
6911         if (resource)
6912                 resource_list = &resource->resource_list;
6913         else
6914                 resource_list = &devlink->resource_list;
6915
6916         if (!resource)
6917                 mutex_lock(&devlink->lock);
6918
6919         list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
6920                 devlink_resources_unregister(devlink, child_resource);
6921                 list_del(&child_resource->list);
6922                 kfree(child_resource);
6923         }
6924
6925         if (!resource)
6926                 mutex_unlock(&devlink->lock);
6927 }
6928 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
6929
6930 /**
6931  *      devlink_resource_size_get - get and update size
6932  *
6933  *      @devlink: devlink
6934  *      @resource_id: the requested resource id
6935  *      @p_resource_size: ptr to update
6936  */
6937 int devlink_resource_size_get(struct devlink *devlink,
6938                               u64 resource_id,
6939                               u64 *p_resource_size)
6940 {
6941         struct devlink_resource *resource;
6942         int err = 0;
6943
6944         mutex_lock(&devlink->lock);
6945         resource = devlink_resource_find(devlink, NULL, resource_id);
6946         if (!resource) {
6947                 err = -EINVAL;
6948                 goto out;
6949         }
6950         *p_resource_size = resource->size_new;
6951         resource->size = resource->size_new;
6952 out:
6953         mutex_unlock(&devlink->lock);
6954         return err;
6955 }
6956 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
6957
6958 /**
6959  *      devlink_dpipe_table_resource_set - set the resource id
6960  *
6961  *      @devlink: devlink
6962  *      @table_name: table name
6963  *      @resource_id: resource id
6964  *      @resource_units: number of resource's units consumed per table's entry
6965  */
6966 int devlink_dpipe_table_resource_set(struct devlink *devlink,
6967                                      const char *table_name, u64 resource_id,
6968                                      u64 resource_units)
6969 {
6970         struct devlink_dpipe_table *table;
6971         int err = 0;
6972
6973         mutex_lock(&devlink->lock);
6974         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
6975                                          table_name);
6976         if (!table) {
6977                 err = -EINVAL;
6978                 goto out;
6979         }
6980         table->resource_id = resource_id;
6981         table->resource_units = resource_units;
6982         table->resource_valid = true;
6983 out:
6984         mutex_unlock(&devlink->lock);
6985         return err;
6986 }
6987 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
6988
6989 /**
6990  *      devlink_resource_occ_get_register - register occupancy getter
6991  *
6992  *      @devlink: devlink
6993  *      @resource_id: resource id
6994  *      @occ_get: occupancy getter callback
6995  *      @occ_get_priv: occupancy getter callback priv
6996  */
6997 void devlink_resource_occ_get_register(struct devlink *devlink,
6998                                        u64 resource_id,
6999                                        devlink_resource_occ_get_t *occ_get,
7000                                        void *occ_get_priv)
7001 {
7002         struct devlink_resource *resource;
7003
7004         mutex_lock(&devlink->lock);
7005         resource = devlink_resource_find(devlink, NULL, resource_id);
7006         if (WARN_ON(!resource))
7007                 goto out;
7008         WARN_ON(resource->occ_get);
7009
7010         resource->occ_get = occ_get;
7011         resource->occ_get_priv = occ_get_priv;
7012 out:
7013         mutex_unlock(&devlink->lock);
7014 }
7015 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
7016
7017 /**
7018  *      devlink_resource_occ_get_unregister - unregister occupancy getter
7019  *
7020  *      @devlink: devlink
7021  *      @resource_id: resource id
7022  */
7023 void devlink_resource_occ_get_unregister(struct devlink *devlink,
7024                                          u64 resource_id)
7025 {
7026         struct devlink_resource *resource;
7027
7028         mutex_lock(&devlink->lock);
7029         resource = devlink_resource_find(devlink, NULL, resource_id);
7030         if (WARN_ON(!resource))
7031                 goto out;
7032         WARN_ON(!resource->occ_get);
7033
7034         resource->occ_get = NULL;
7035         resource->occ_get_priv = NULL;
7036 out:
7037         mutex_unlock(&devlink->lock);
7038 }
7039 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
7040
7041 static int devlink_param_verify(const struct devlink_param *param)
7042 {
7043         if (!param || !param->name || !param->supported_cmodes)
7044                 return -EINVAL;
7045         if (param->generic)
7046                 return devlink_param_generic_verify(param);
7047         else
7048                 return devlink_param_driver_verify(param);
7049 }
7050
7051 static int __devlink_params_register(struct devlink *devlink,
7052                                      unsigned int port_index,
7053                                      struct list_head *param_list,
7054                                      const struct devlink_param *params,
7055                                      size_t params_count,
7056                                      enum devlink_command reg_cmd,
7057                                      enum devlink_command unreg_cmd)
7058 {
7059         const struct devlink_param *param = params;
7060         int i;
7061         int err;
7062
7063         mutex_lock(&devlink->lock);
7064         for (i = 0; i < params_count; i++, param++) {
7065                 err = devlink_param_verify(param);
7066                 if (err)
7067                         goto rollback;
7068
7069                 err = devlink_param_register_one(devlink, port_index,
7070                                                  param_list, param, reg_cmd);
7071                 if (err)
7072                         goto rollback;
7073         }
7074
7075         mutex_unlock(&devlink->lock);
7076         return 0;
7077
7078 rollback:
7079         if (!i)
7080                 goto unlock;
7081         for (param--; i > 0; i--, param--)
7082                 devlink_param_unregister_one(devlink, port_index, param_list,
7083                                              param, unreg_cmd);
7084 unlock:
7085         mutex_unlock(&devlink->lock);
7086         return err;
7087 }
7088
7089 static void __devlink_params_unregister(struct devlink *devlink,
7090                                         unsigned int port_index,
7091                                         struct list_head *param_list,
7092                                         const struct devlink_param *params,
7093                                         size_t params_count,
7094                                         enum devlink_command cmd)
7095 {
7096         const struct devlink_param *param = params;
7097         int i;
7098
7099         mutex_lock(&devlink->lock);
7100         for (i = 0; i < params_count; i++, param++)
7101                 devlink_param_unregister_one(devlink, 0, param_list, param,
7102                                              cmd);
7103         mutex_unlock(&devlink->lock);
7104 }
7105
7106 /**
7107  *      devlink_params_register - register configuration parameters
7108  *
7109  *      @devlink: devlink
7110  *      @params: configuration parameters array
7111  *      @params_count: number of parameters provided
7112  *
7113  *      Register the configuration parameters supported by the driver.
7114  */
7115 int devlink_params_register(struct devlink *devlink,
7116                             const struct devlink_param *params,
7117                             size_t params_count)
7118 {
7119         return __devlink_params_register(devlink, 0, &devlink->param_list,
7120                                          params, params_count,
7121                                          DEVLINK_CMD_PARAM_NEW,
7122                                          DEVLINK_CMD_PARAM_DEL);
7123 }
7124 EXPORT_SYMBOL_GPL(devlink_params_register);
7125
7126 /**
7127  *      devlink_params_unregister - unregister configuration parameters
7128  *      @devlink: devlink
7129  *      @params: configuration parameters to unregister
7130  *      @params_count: number of parameters provided
7131  */
7132 void devlink_params_unregister(struct devlink *devlink,
7133                                const struct devlink_param *params,
7134                                size_t params_count)
7135 {
7136         return __devlink_params_unregister(devlink, 0, &devlink->param_list,
7137                                            params, params_count,
7138                                            DEVLINK_CMD_PARAM_DEL);
7139 }
7140 EXPORT_SYMBOL_GPL(devlink_params_unregister);
7141
7142 /**
7143  *      devlink_params_publish - publish configuration parameters
7144  *
7145  *      @devlink: devlink
7146  *
7147  *      Publish previously registered configuration parameters.
7148  */
7149 void devlink_params_publish(struct devlink *devlink)
7150 {
7151         struct devlink_param_item *param_item;
7152
7153         list_for_each_entry(param_item, &devlink->param_list, list) {
7154                 if (param_item->published)
7155                         continue;
7156                 param_item->published = true;
7157                 devlink_param_notify(devlink, 0, param_item,
7158                                      DEVLINK_CMD_PARAM_NEW);
7159         }
7160 }
7161 EXPORT_SYMBOL_GPL(devlink_params_publish);
7162
7163 /**
7164  *      devlink_params_unpublish - unpublish configuration parameters
7165  *
7166  *      @devlink: devlink
7167  *
7168  *      Unpublish previously registered configuration parameters.
7169  */
7170 void devlink_params_unpublish(struct devlink *devlink)
7171 {
7172         struct devlink_param_item *param_item;
7173
7174         list_for_each_entry(param_item, &devlink->param_list, list) {
7175                 if (!param_item->published)
7176                         continue;
7177                 param_item->published = false;
7178                 devlink_param_notify(devlink, 0, param_item,
7179                                      DEVLINK_CMD_PARAM_DEL);
7180         }
7181 }
7182 EXPORT_SYMBOL_GPL(devlink_params_unpublish);
7183
7184 /**
7185  *      devlink_port_params_register - register port configuration parameters
7186  *
7187  *      @devlink_port: devlink port
7188  *      @params: configuration parameters array
7189  *      @params_count: number of parameters provided
7190  *
7191  *      Register the configuration parameters supported by the port.
7192  */
7193 int devlink_port_params_register(struct devlink_port *devlink_port,
7194                                  const struct devlink_param *params,
7195                                  size_t params_count)
7196 {
7197         return __devlink_params_register(devlink_port->devlink,
7198                                          devlink_port->index,
7199                                          &devlink_port->param_list, params,
7200                                          params_count,
7201                                          DEVLINK_CMD_PORT_PARAM_NEW,
7202                                          DEVLINK_CMD_PORT_PARAM_DEL);
7203 }
7204 EXPORT_SYMBOL_GPL(devlink_port_params_register);
7205
7206 /**
7207  *      devlink_port_params_unregister - unregister port configuration
7208  *      parameters
7209  *
7210  *      @devlink_port: devlink port
7211  *      @params: configuration parameters array
7212  *      @params_count: number of parameters provided
7213  */
7214 void devlink_port_params_unregister(struct devlink_port *devlink_port,
7215                                     const struct devlink_param *params,
7216                                     size_t params_count)
7217 {
7218         return __devlink_params_unregister(devlink_port->devlink,
7219                                            devlink_port->index,
7220                                            &devlink_port->param_list,
7221                                            params, params_count,
7222                                            DEVLINK_CMD_PORT_PARAM_DEL);
7223 }
7224 EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
7225
7226 static int
7227 __devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
7228                                      union devlink_param_value *init_val)
7229 {
7230         struct devlink_param_item *param_item;
7231
7232         param_item = devlink_param_find_by_id(param_list, param_id);
7233         if (!param_item)
7234                 return -EINVAL;
7235
7236         if (!param_item->driverinit_value_valid ||
7237             !devlink_param_cmode_is_supported(param_item->param,
7238                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
7239                 return -EOPNOTSUPP;
7240
7241         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
7242                 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
7243         else
7244                 *init_val = param_item->driverinit_value;
7245
7246         return 0;
7247 }
7248
7249 static int
7250 __devlink_param_driverinit_value_set(struct devlink *devlink,
7251                                      unsigned int port_index,
7252                                      struct list_head *param_list, u32 param_id,
7253                                      union devlink_param_value init_val,
7254                                      enum devlink_command cmd)
7255 {
7256         struct devlink_param_item *param_item;
7257
7258         param_item = devlink_param_find_by_id(param_list, param_id);
7259         if (!param_item)
7260                 return -EINVAL;
7261
7262         if (!devlink_param_cmode_is_supported(param_item->param,
7263                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
7264                 return -EOPNOTSUPP;
7265
7266         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
7267                 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
7268         else
7269                 param_item->driverinit_value = init_val;
7270         param_item->driverinit_value_valid = true;
7271
7272         devlink_param_notify(devlink, port_index, param_item, cmd);
7273         return 0;
7274 }
7275
7276 /**
7277  *      devlink_param_driverinit_value_get - get configuration parameter
7278  *                                           value for driver initializing
7279  *
7280  *      @devlink: devlink
7281  *      @param_id: parameter ID
7282  *      @init_val: value of parameter in driverinit configuration mode
7283  *
7284  *      This function should be used by the driver to get driverinit
7285  *      configuration for initialization after reload command.
7286  */
7287 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
7288                                        union devlink_param_value *init_val)
7289 {
7290         if (!devlink_reload_supported(devlink))
7291                 return -EOPNOTSUPP;
7292
7293         return __devlink_param_driverinit_value_get(&devlink->param_list,
7294                                                     param_id, init_val);
7295 }
7296 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
7297
7298 /**
7299  *      devlink_param_driverinit_value_set - set value of configuration
7300  *                                           parameter for driverinit
7301  *                                           configuration mode
7302  *
7303  *      @devlink: devlink
7304  *      @param_id: parameter ID
7305  *      @init_val: value of parameter to set for driverinit configuration mode
7306  *
7307  *      This function should be used by the driver to set driverinit
7308  *      configuration mode default value.
7309  */
7310 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
7311                                        union devlink_param_value init_val)
7312 {
7313         return __devlink_param_driverinit_value_set(devlink, 0,
7314                                                     &devlink->param_list,
7315                                                     param_id, init_val,
7316                                                     DEVLINK_CMD_PARAM_NEW);
7317 }
7318 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
7319
7320 /**
7321  *      devlink_port_param_driverinit_value_get - get configuration parameter
7322  *                                              value for driver initializing
7323  *
7324  *      @devlink_port: devlink_port
7325  *      @param_id: parameter ID
7326  *      @init_val: value of parameter in driverinit configuration mode
7327  *
7328  *      This function should be used by the driver to get driverinit
7329  *      configuration for initialization after reload command.
7330  */
7331 int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port,
7332                                             u32 param_id,
7333                                             union devlink_param_value *init_val)
7334 {
7335         struct devlink *devlink = devlink_port->devlink;
7336
7337         if (!devlink_reload_supported(devlink))
7338                 return -EOPNOTSUPP;
7339
7340         return __devlink_param_driverinit_value_get(&devlink_port->param_list,
7341                                                     param_id, init_val);
7342 }
7343 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get);
7344
7345 /**
7346  *     devlink_port_param_driverinit_value_set - set value of configuration
7347  *                                               parameter for driverinit
7348  *                                               configuration mode
7349  *
7350  *     @devlink_port: devlink_port
7351  *     @param_id: parameter ID
7352  *     @init_val: value of parameter to set for driverinit configuration mode
7353  *
7354  *     This function should be used by the driver to set driverinit
7355  *     configuration mode default value.
7356  */
7357 int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
7358                                             u32 param_id,
7359                                             union devlink_param_value init_val)
7360 {
7361         return __devlink_param_driverinit_value_set(devlink_port->devlink,
7362                                                     devlink_port->index,
7363                                                     &devlink_port->param_list,
7364                                                     param_id, init_val,
7365                                                     DEVLINK_CMD_PORT_PARAM_NEW);
7366 }
7367 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
7368
7369 /**
7370  *      devlink_param_value_changed - notify devlink on a parameter's value
7371  *                                    change. Should be called by the driver
7372  *                                    right after the change.
7373  *
7374  *      @devlink: devlink
7375  *      @param_id: parameter ID
7376  *
7377  *      This function should be used by the driver to notify devlink on value
7378  *      change, excluding driverinit configuration mode.
7379  *      For driverinit configuration mode driver should use the function
7380  */
7381 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
7382 {
7383         struct devlink_param_item *param_item;
7384
7385         param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
7386         WARN_ON(!param_item);
7387
7388         devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
7389 }
7390 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
7391
7392 /**
7393  *     devlink_port_param_value_changed - notify devlink on a parameter's value
7394  *                                      change. Should be called by the driver
7395  *                                      right after the change.
7396  *
7397  *     @devlink_port: devlink_port
7398  *     @param_id: parameter ID
7399  *
7400  *     This function should be used by the driver to notify devlink on value
7401  *     change, excluding driverinit configuration mode.
7402  *     For driverinit configuration mode driver should use the function
7403  *     devlink_port_param_driverinit_value_set() instead.
7404  */
7405 void devlink_port_param_value_changed(struct devlink_port *devlink_port,
7406                                       u32 param_id)
7407 {
7408         struct devlink_param_item *param_item;
7409
7410         param_item = devlink_param_find_by_id(&devlink_port->param_list,
7411                                               param_id);
7412         WARN_ON(!param_item);
7413
7414         devlink_param_notify(devlink_port->devlink, devlink_port->index,
7415                              param_item, DEVLINK_CMD_PORT_PARAM_NEW);
7416 }
7417 EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
7418
7419 /**
7420  *      devlink_param_value_str_fill - Safely fill-up the string preventing
7421  *                                     from overflow of the preallocated buffer
7422  *
7423  *      @dst_val: destination devlink_param_value
7424  *      @src: source buffer
7425  */
7426 void devlink_param_value_str_fill(union devlink_param_value *dst_val,
7427                                   const char *src)
7428 {
7429         size_t len;
7430
7431         len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
7432         WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
7433 }
7434 EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
7435
7436 /**
7437  *      devlink_region_create - create a new address region
7438  *
7439  *      @devlink: devlink
7440  *      @region_name: region name
7441  *      @region_max_snapshots: Maximum supported number of snapshots for region
7442  *      @region_size: size of region
7443  */
7444 struct devlink_region *devlink_region_create(struct devlink *devlink,
7445                                              const char *region_name,
7446                                              u32 region_max_snapshots,
7447                                              u64 region_size)
7448 {
7449         struct devlink_region *region;
7450         int err = 0;
7451
7452         mutex_lock(&devlink->lock);
7453
7454         if (devlink_region_get_by_name(devlink, region_name)) {
7455                 err = -EEXIST;
7456                 goto unlock;
7457         }
7458
7459         region = kzalloc(sizeof(*region), GFP_KERNEL);
7460         if (!region) {
7461                 err = -ENOMEM;
7462                 goto unlock;
7463         }
7464
7465         region->devlink = devlink;
7466         region->max_snapshots = region_max_snapshots;
7467         region->name = region_name;
7468         region->size = region_size;
7469         INIT_LIST_HEAD(&region->snapshot_list);
7470         list_add_tail(&region->list, &devlink->region_list);
7471         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
7472
7473         mutex_unlock(&devlink->lock);
7474         return region;
7475
7476 unlock:
7477         mutex_unlock(&devlink->lock);
7478         return ERR_PTR(err);
7479 }
7480 EXPORT_SYMBOL_GPL(devlink_region_create);
7481
7482 /**
7483  *      devlink_region_destroy - destroy address region
7484  *
7485  *      @region: devlink region to destroy
7486  */
7487 void devlink_region_destroy(struct devlink_region *region)
7488 {
7489         struct devlink *devlink = region->devlink;
7490         struct devlink_snapshot *snapshot, *ts;
7491
7492         mutex_lock(&devlink->lock);
7493
7494         /* Free all snapshots of region */
7495         list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
7496                 devlink_region_snapshot_del(region, snapshot);
7497
7498         list_del(&region->list);
7499
7500         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
7501         mutex_unlock(&devlink->lock);
7502         kfree(region);
7503 }
7504 EXPORT_SYMBOL_GPL(devlink_region_destroy);
7505
7506 /**
7507  *      devlink_region_shapshot_id_get - get snapshot ID
7508  *
7509  *      This callback should be called when adding a new snapshot,
7510  *      Driver should use the same id for multiple snapshots taken
7511  *      on multiple regions at the same time/by the same trigger.
7512  *
7513  *      @devlink: devlink
7514  */
7515 u32 devlink_region_shapshot_id_get(struct devlink *devlink)
7516 {
7517         u32 id;
7518
7519         mutex_lock(&devlink->lock);
7520         id = ++devlink->snapshot_id;
7521         mutex_unlock(&devlink->lock);
7522
7523         return id;
7524 }
7525 EXPORT_SYMBOL_GPL(devlink_region_shapshot_id_get);
7526
7527 /**
7528  *      devlink_region_snapshot_create - create a new snapshot
7529  *      This will add a new snapshot of a region. The snapshot
7530  *      will be stored on the region struct and can be accessed
7531  *      from devlink. This is useful for future analyses of snapshots.
7532  *      Multiple snapshots can be created on a region.
7533  *      The @snapshot_id should be obtained using the getter function.
7534  *
7535  *      @region: devlink region of the snapshot
7536  *      @data: snapshot data
7537  *      @snapshot_id: snapshot id to be created
7538  *      @data_destructor: pointer to destructor function to free data
7539  */
7540 int devlink_region_snapshot_create(struct devlink_region *region,
7541                                    u8 *data, u32 snapshot_id,
7542                                    devlink_snapshot_data_dest_t *data_destructor)
7543 {
7544         struct devlink *devlink = region->devlink;
7545         struct devlink_snapshot *snapshot;
7546         int err;
7547
7548         mutex_lock(&devlink->lock);
7549
7550         /* check if region can hold one more snapshot */
7551         if (region->cur_snapshots == region->max_snapshots) {
7552                 err = -ENOMEM;
7553                 goto unlock;
7554         }
7555
7556         if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
7557                 err = -EEXIST;
7558                 goto unlock;
7559         }
7560
7561         snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
7562         if (!snapshot) {
7563                 err = -ENOMEM;
7564                 goto unlock;
7565         }
7566
7567         snapshot->id = snapshot_id;
7568         snapshot->region = region;
7569         snapshot->data = data;
7570         snapshot->data_destructor = data_destructor;
7571
7572         list_add_tail(&snapshot->list, &region->snapshot_list);
7573
7574         region->cur_snapshots++;
7575
7576         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
7577         mutex_unlock(&devlink->lock);
7578         return 0;
7579
7580 unlock:
7581         mutex_unlock(&devlink->lock);
7582         return err;
7583 }
7584 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
7585
7586 #define DEVLINK_TRAP(_id, _type)                                              \
7587         {                                                                     \
7588                 .type = DEVLINK_TRAP_TYPE_##_type,                            \
7589                 .id = DEVLINK_TRAP_GENERIC_ID_##_id,                          \
7590                 .name = DEVLINK_TRAP_GENERIC_NAME_##_id,                      \
7591         }
7592
7593 static const struct devlink_trap devlink_trap_generic[] = {
7594         DEVLINK_TRAP(SMAC_MC, DROP),
7595         DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
7596         DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
7597         DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
7598         DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
7599         DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
7600         DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
7601         DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
7602         DEVLINK_TRAP(TAIL_DROP, DROP),
7603 };
7604
7605 #define DEVLINK_TRAP_GROUP(_id)                                               \
7606         {                                                                     \
7607                 .id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id,                    \
7608                 .name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id,                \
7609         }
7610
7611 static const struct devlink_trap_group devlink_trap_group_generic[] = {
7612         DEVLINK_TRAP_GROUP(L2_DROPS),
7613         DEVLINK_TRAP_GROUP(L3_DROPS),
7614         DEVLINK_TRAP_GROUP(BUFFER_DROPS),
7615 };
7616
7617 static int devlink_trap_generic_verify(const struct devlink_trap *trap)
7618 {
7619         if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
7620                 return -EINVAL;
7621
7622         if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
7623                 return -EINVAL;
7624
7625         if (trap->type != devlink_trap_generic[trap->id].type)
7626                 return -EINVAL;
7627
7628         return 0;
7629 }
7630
7631 static int devlink_trap_driver_verify(const struct devlink_trap *trap)
7632 {
7633         int i;
7634
7635         if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
7636                 return -EINVAL;
7637
7638         for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
7639                 if (!strcmp(trap->name, devlink_trap_generic[i].name))
7640                         return -EEXIST;
7641         }
7642
7643         return 0;
7644 }
7645
7646 static int devlink_trap_verify(const struct devlink_trap *trap)
7647 {
7648         if (!trap || !trap->name || !trap->group.name)
7649                 return -EINVAL;
7650
7651         if (trap->generic)
7652                 return devlink_trap_generic_verify(trap);
7653         else
7654                 return devlink_trap_driver_verify(trap);
7655 }
7656
7657 static int
7658 devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
7659 {
7660         if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
7661                 return -EINVAL;
7662
7663         if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
7664                 return -EINVAL;
7665
7666         return 0;
7667 }
7668
7669 static int
7670 devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
7671 {
7672         int i;
7673
7674         if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
7675                 return -EINVAL;
7676
7677         for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
7678                 if (!strcmp(group->name, devlink_trap_group_generic[i].name))
7679                         return -EEXIST;
7680         }
7681
7682         return 0;
7683 }
7684
7685 static int devlink_trap_group_verify(const struct devlink_trap_group *group)
7686 {
7687         if (group->generic)
7688                 return devlink_trap_group_generic_verify(group);
7689         else
7690                 return devlink_trap_group_driver_verify(group);
7691 }
7692
7693 static void
7694 devlink_trap_group_notify(struct devlink *devlink,
7695                           const struct devlink_trap_group_item *group_item,
7696                           enum devlink_command cmd)
7697 {
7698         struct sk_buff *msg;
7699         int err;
7700
7701         WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
7702                      cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
7703
7704         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7705         if (!msg)
7706                 return;
7707
7708         err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
7709                                          0);
7710         if (err) {
7711                 nlmsg_free(msg);
7712                 return;
7713         }
7714
7715         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
7716                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
7717 }
7718
7719 static struct devlink_trap_group_item *
7720 devlink_trap_group_item_create(struct devlink *devlink,
7721                                const struct devlink_trap_group *group)
7722 {
7723         struct devlink_trap_group_item *group_item;
7724         int err;
7725
7726         err = devlink_trap_group_verify(group);
7727         if (err)
7728                 return ERR_PTR(err);
7729
7730         group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
7731         if (!group_item)
7732                 return ERR_PTR(-ENOMEM);
7733
7734         group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
7735         if (!group_item->stats) {
7736                 err = -ENOMEM;
7737                 goto err_stats_alloc;
7738         }
7739
7740         group_item->group = group;
7741         refcount_set(&group_item->refcount, 1);
7742
7743         if (devlink->ops->trap_group_init) {
7744                 err = devlink->ops->trap_group_init(devlink, group);
7745                 if (err)
7746                         goto err_group_init;
7747         }
7748
7749         list_add_tail(&group_item->list, &devlink->trap_group_list);
7750         devlink_trap_group_notify(devlink, group_item,
7751                                   DEVLINK_CMD_TRAP_GROUP_NEW);
7752
7753         return group_item;
7754
7755 err_group_init:
7756         free_percpu(group_item->stats);
7757 err_stats_alloc:
7758         kfree(group_item);
7759         return ERR_PTR(err);
7760 }
7761
7762 static void
7763 devlink_trap_group_item_destroy(struct devlink *devlink,
7764                                 struct devlink_trap_group_item *group_item)
7765 {
7766         devlink_trap_group_notify(devlink, group_item,
7767                                   DEVLINK_CMD_TRAP_GROUP_DEL);
7768         list_del(&group_item->list);
7769         free_percpu(group_item->stats);
7770         kfree(group_item);
7771 }
7772
7773 static struct devlink_trap_group_item *
7774 devlink_trap_group_item_get(struct devlink *devlink,
7775                             const struct devlink_trap_group *group)
7776 {
7777         struct devlink_trap_group_item *group_item;
7778
7779         group_item = devlink_trap_group_item_lookup(devlink, group->name);
7780         if (group_item) {
7781                 refcount_inc(&group_item->refcount);
7782                 return group_item;
7783         }
7784
7785         return devlink_trap_group_item_create(devlink, group);
7786 }
7787
7788 static void
7789 devlink_trap_group_item_put(struct devlink *devlink,
7790                             struct devlink_trap_group_item *group_item)
7791 {
7792         if (!refcount_dec_and_test(&group_item->refcount))
7793                 return;
7794
7795         devlink_trap_group_item_destroy(devlink, group_item);
7796 }
7797
7798 static int
7799 devlink_trap_item_group_link(struct devlink *devlink,
7800                              struct devlink_trap_item *trap_item)
7801 {
7802         struct devlink_trap_group_item *group_item;
7803
7804         group_item = devlink_trap_group_item_get(devlink,
7805                                                  &trap_item->trap->group);
7806         if (IS_ERR(group_item))
7807                 return PTR_ERR(group_item);
7808
7809         trap_item->group_item = group_item;
7810
7811         return 0;
7812 }
7813
7814 static void
7815 devlink_trap_item_group_unlink(struct devlink *devlink,
7816                                struct devlink_trap_item *trap_item)
7817 {
7818         devlink_trap_group_item_put(devlink, trap_item->group_item);
7819 }
7820
7821 static void devlink_trap_notify(struct devlink *devlink,
7822                                 const struct devlink_trap_item *trap_item,
7823                                 enum devlink_command cmd)
7824 {
7825         struct sk_buff *msg;
7826         int err;
7827
7828         WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
7829                      cmd != DEVLINK_CMD_TRAP_DEL);
7830
7831         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7832         if (!msg)
7833                 return;
7834
7835         err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
7836         if (err) {
7837                 nlmsg_free(msg);
7838                 return;
7839         }
7840
7841         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
7842                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
7843 }
7844
7845 static int
7846 devlink_trap_register(struct devlink *devlink,
7847                       const struct devlink_trap *trap, void *priv)
7848 {
7849         struct devlink_trap_item *trap_item;
7850         int err;
7851
7852         if (devlink_trap_item_lookup(devlink, trap->name))
7853                 return -EEXIST;
7854
7855         trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
7856         if (!trap_item)
7857                 return -ENOMEM;
7858
7859         trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
7860         if (!trap_item->stats) {
7861                 err = -ENOMEM;
7862                 goto err_stats_alloc;
7863         }
7864
7865         trap_item->trap = trap;
7866         trap_item->action = trap->init_action;
7867         trap_item->priv = priv;
7868
7869         err = devlink_trap_item_group_link(devlink, trap_item);
7870         if (err)
7871                 goto err_group_link;
7872
7873         err = devlink->ops->trap_init(devlink, trap, trap_item);
7874         if (err)
7875                 goto err_trap_init;
7876
7877         list_add_tail(&trap_item->list, &devlink->trap_list);
7878         devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
7879
7880         return 0;
7881
7882 err_trap_init:
7883         devlink_trap_item_group_unlink(devlink, trap_item);
7884 err_group_link:
7885         free_percpu(trap_item->stats);
7886 err_stats_alloc:
7887         kfree(trap_item);
7888         return err;
7889 }
7890
7891 static void devlink_trap_unregister(struct devlink *devlink,
7892                                     const struct devlink_trap *trap)
7893 {
7894         struct devlink_trap_item *trap_item;
7895
7896         trap_item = devlink_trap_item_lookup(devlink, trap->name);
7897         if (WARN_ON_ONCE(!trap_item))
7898                 return;
7899
7900         devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
7901         list_del(&trap_item->list);
7902         if (devlink->ops->trap_fini)
7903                 devlink->ops->trap_fini(devlink, trap, trap_item);
7904         devlink_trap_item_group_unlink(devlink, trap_item);
7905         free_percpu(trap_item->stats);
7906         kfree(trap_item);
7907 }
7908
7909 static void devlink_trap_disable(struct devlink *devlink,
7910                                  const struct devlink_trap *trap)
7911 {
7912         struct devlink_trap_item *trap_item;
7913
7914         trap_item = devlink_trap_item_lookup(devlink, trap->name);
7915         if (WARN_ON_ONCE(!trap_item))
7916                 return;
7917
7918         devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP);
7919         trap_item->action = DEVLINK_TRAP_ACTION_DROP;
7920 }
7921
7922 /**
7923  * devlink_traps_register - Register packet traps with devlink.
7924  * @devlink: devlink.
7925  * @traps: Packet traps.
7926  * @traps_count: Count of provided packet traps.
7927  * @priv: Driver private information.
7928  *
7929  * Return: Non-zero value on failure.
7930  */
7931 int devlink_traps_register(struct devlink *devlink,
7932                            const struct devlink_trap *traps,
7933                            size_t traps_count, void *priv)
7934 {
7935         int i, err;
7936
7937         if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
7938                 return -EINVAL;
7939
7940         mutex_lock(&devlink->lock);
7941         for (i = 0; i < traps_count; i++) {
7942                 const struct devlink_trap *trap = &traps[i];
7943
7944                 err = devlink_trap_verify(trap);
7945                 if (err)
7946                         goto err_trap_verify;
7947
7948                 err = devlink_trap_register(devlink, trap, priv);
7949                 if (err)
7950                         goto err_trap_register;
7951         }
7952         mutex_unlock(&devlink->lock);
7953
7954         return 0;
7955
7956 err_trap_register:
7957 err_trap_verify:
7958         for (i--; i >= 0; i--)
7959                 devlink_trap_unregister(devlink, &traps[i]);
7960         mutex_unlock(&devlink->lock);
7961         return err;
7962 }
7963 EXPORT_SYMBOL_GPL(devlink_traps_register);
7964
7965 /**
7966  * devlink_traps_unregister - Unregister packet traps from devlink.
7967  * @devlink: devlink.
7968  * @traps: Packet traps.
7969  * @traps_count: Count of provided packet traps.
7970  */
7971 void devlink_traps_unregister(struct devlink *devlink,
7972                               const struct devlink_trap *traps,
7973                               size_t traps_count)
7974 {
7975         int i;
7976
7977         mutex_lock(&devlink->lock);
7978         /* Make sure we do not have any packets in-flight while unregistering
7979          * traps by disabling all of them and waiting for a grace period.
7980          */
7981         for (i = traps_count - 1; i >= 0; i--)
7982                 devlink_trap_disable(devlink, &traps[i]);
7983         synchronize_rcu();
7984         for (i = traps_count - 1; i >= 0; i--)
7985                 devlink_trap_unregister(devlink, &traps[i]);
7986         mutex_unlock(&devlink->lock);
7987 }
7988 EXPORT_SYMBOL_GPL(devlink_traps_unregister);
7989
7990 static void
7991 devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
7992                           size_t skb_len)
7993 {
7994         struct devlink_stats *stats;
7995
7996         stats = this_cpu_ptr(trap_stats);
7997         u64_stats_update_begin(&stats->syncp);
7998         stats->rx_bytes += skb_len;
7999         stats->rx_packets++;
8000         u64_stats_update_end(&stats->syncp);
8001 }
8002
8003 static void
8004 devlink_trap_report_metadata_fill(struct net_dm_hw_metadata *hw_metadata,
8005                                   const struct devlink_trap_item *trap_item,
8006                                   struct devlink_port *in_devlink_port)
8007 {
8008         struct devlink_trap_group_item *group_item = trap_item->group_item;
8009
8010         hw_metadata->trap_group_name = group_item->group->name;
8011         hw_metadata->trap_name = trap_item->trap->name;
8012
8013         spin_lock(&in_devlink_port->type_lock);
8014         if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
8015                 hw_metadata->input_dev = in_devlink_port->type_dev;
8016         spin_unlock(&in_devlink_port->type_lock);
8017 }
8018
8019 /**
8020  * devlink_trap_report - Report trapped packet to drop monitor.
8021  * @devlink: devlink.
8022  * @skb: Trapped packet.
8023  * @trap_ctx: Trap context.
8024  * @in_devlink_port: Input devlink port.
8025  */
8026 void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
8027                          void *trap_ctx, struct devlink_port *in_devlink_port)
8028 {
8029         struct devlink_trap_item *trap_item = trap_ctx;
8030         struct net_dm_hw_metadata hw_metadata = {};
8031
8032         devlink_trap_stats_update(trap_item->stats, skb->len);
8033         devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
8034
8035         devlink_trap_report_metadata_fill(&hw_metadata, trap_item,
8036                                           in_devlink_port);
8037         net_dm_hw_report(skb, &hw_metadata);
8038 }
8039 EXPORT_SYMBOL_GPL(devlink_trap_report);
8040
8041 /**
8042  * devlink_trap_ctx_priv - Trap context to driver private information.
8043  * @trap_ctx: Trap context.
8044  *
8045  * Return: Driver private information passed during registration.
8046  */
8047 void *devlink_trap_ctx_priv(void *trap_ctx)
8048 {
8049         struct devlink_trap_item *trap_item = trap_ctx;
8050
8051         return trap_item->priv;
8052 }
8053 EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
8054
8055 static void __devlink_compat_running_version(struct devlink *devlink,
8056                                              char *buf, size_t len)
8057 {
8058         const struct nlattr *nlattr;
8059         struct devlink_info_req req;
8060         struct sk_buff *msg;
8061         int rem, err;
8062
8063         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8064         if (!msg)
8065                 return;
8066
8067         req.msg = msg;
8068         err = devlink->ops->info_get(devlink, &req, NULL);
8069         if (err)
8070                 goto free_msg;
8071
8072         nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
8073                 const struct nlattr *kv;
8074                 int rem_kv;
8075
8076                 if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
8077                         continue;
8078
8079                 nla_for_each_nested(kv, nlattr, rem_kv) {
8080                         if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
8081                                 continue;
8082
8083                         strlcat(buf, nla_data(kv), len);
8084                         strlcat(buf, " ", len);
8085                 }
8086         }
8087 free_msg:
8088         nlmsg_free(msg);
8089 }
8090
8091 void devlink_compat_running_version(struct net_device *dev,
8092                                     char *buf, size_t len)
8093 {
8094         struct devlink *devlink;
8095
8096         dev_hold(dev);
8097         rtnl_unlock();
8098
8099         devlink = netdev_to_devlink(dev);
8100         if (!devlink || !devlink->ops->info_get)
8101                 goto out;
8102
8103         mutex_lock(&devlink->lock);
8104         __devlink_compat_running_version(devlink, buf, len);
8105         mutex_unlock(&devlink->lock);
8106
8107 out:
8108         rtnl_lock();
8109         dev_put(dev);
8110 }
8111
8112 int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
8113 {
8114         struct devlink *devlink;
8115         int ret;
8116
8117         dev_hold(dev);
8118         rtnl_unlock();
8119
8120         devlink = netdev_to_devlink(dev);
8121         if (!devlink || !devlink->ops->flash_update) {
8122                 ret = -EOPNOTSUPP;
8123                 goto out;
8124         }
8125
8126         mutex_lock(&devlink->lock);
8127         ret = devlink->ops->flash_update(devlink, file_name, NULL, NULL);
8128         mutex_unlock(&devlink->lock);
8129
8130 out:
8131         rtnl_lock();
8132         dev_put(dev);
8133
8134         return ret;
8135 }
8136
8137 int devlink_compat_phys_port_name_get(struct net_device *dev,
8138                                       char *name, size_t len)
8139 {
8140         struct devlink_port *devlink_port;
8141
8142         /* RTNL mutex is held here which ensures that devlink_port
8143          * instance cannot disappear in the middle. No need to take
8144          * any devlink lock as only permanent values are accessed.
8145          */
8146         ASSERT_RTNL();
8147
8148         devlink_port = netdev_to_devlink_port(dev);
8149         if (!devlink_port)
8150                 return -EOPNOTSUPP;
8151
8152         return __devlink_port_phys_port_name_get(devlink_port, name, len);
8153 }
8154
8155 int devlink_compat_switch_id_get(struct net_device *dev,
8156                                  struct netdev_phys_item_id *ppid)
8157 {
8158         struct devlink_port *devlink_port;
8159
8160         /* Caller must hold RTNL mutex or reference to dev, which ensures that
8161          * devlink_port instance cannot disappear in the middle. No need to take
8162          * any devlink lock as only permanent values are accessed.
8163          */
8164         devlink_port = netdev_to_devlink_port(dev);
8165         if (!devlink_port || !devlink_port->attrs.switch_port)
8166                 return -EOPNOTSUPP;
8167
8168         memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
8169
8170         return 0;
8171 }
8172
8173 static void __net_exit devlink_pernet_pre_exit(struct net *net)
8174 {
8175         struct devlink *devlink;
8176         int err;
8177
8178         /* In case network namespace is getting destroyed, reload
8179          * all devlink instances from this namespace into init_net.
8180          */
8181         mutex_lock(&devlink_mutex);
8182         list_for_each_entry(devlink, &devlink_list, list) {
8183                 if (net_eq(devlink_net(devlink), net)) {
8184                         if (WARN_ON(!devlink_reload_supported(devlink)))
8185                                 continue;
8186                         err = devlink_reload(devlink, &init_net, NULL);
8187                         if (err)
8188                                 pr_warn("Failed to reload devlink instance into init_net\n");
8189                 }
8190         }
8191         mutex_unlock(&devlink_mutex);
8192 }
8193
8194 static struct pernet_operations devlink_pernet_ops __net_initdata = {
8195         .pre_exit = devlink_pernet_pre_exit,
8196 };
8197
8198 static int __init devlink_init(void)
8199 {
8200         int err;
8201
8202         err = genl_register_family(&devlink_nl_family);
8203         if (err)
8204                 goto out;
8205         err = register_pernet_subsys(&devlink_pernet_ops);
8206
8207 out:
8208         WARN_ON(err);
8209         return err;
8210 }
8211
8212 subsys_initcall(devlink_init);