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         if (!devlink->reload_enabled)
2795                 return -EOPNOTSUPP;
2796
2797         err = devlink->ops->reload_down(devlink, !!dest_net, extack);
2798         if (err)
2799                 return err;
2800
2801         if (dest_net && !net_eq(dest_net, devlink_net(devlink)))
2802                 devlink_reload_netns_change(devlink, dest_net);
2803
2804         err = devlink->ops->reload_up(devlink, extack);
2805         devlink_reload_failed_set(devlink, !!err);
2806         return err;
2807 }
2808
2809 static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
2810 {
2811         struct devlink *devlink = info->user_ptr[0];
2812         struct net *dest_net = NULL;
2813         int err;
2814
2815         if (!devlink_reload_supported(devlink) || !devlink->reload_enabled)
2816                 return -EOPNOTSUPP;
2817
2818         err = devlink_resources_validate(devlink, NULL, info);
2819         if (err) {
2820                 NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed");
2821                 return err;
2822         }
2823
2824         if (info->attrs[DEVLINK_ATTR_NETNS_PID] ||
2825             info->attrs[DEVLINK_ATTR_NETNS_FD] ||
2826             info->attrs[DEVLINK_ATTR_NETNS_ID]) {
2827                 dest_net = devlink_netns_get(skb, info);
2828                 if (IS_ERR(dest_net))
2829                         return PTR_ERR(dest_net);
2830         }
2831
2832         err = devlink_reload(devlink, dest_net, info->extack);
2833
2834         if (dest_net)
2835                 put_net(dest_net);
2836
2837         return err;
2838 }
2839
2840 static int devlink_nl_flash_update_fill(struct sk_buff *msg,
2841                                         struct devlink *devlink,
2842                                         enum devlink_command cmd,
2843                                         const char *status_msg,
2844                                         const char *component,
2845                                         unsigned long done, unsigned long total)
2846 {
2847         void *hdr;
2848
2849         hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
2850         if (!hdr)
2851                 return -EMSGSIZE;
2852
2853         if (devlink_nl_put_handle(msg, devlink))
2854                 goto nla_put_failure;
2855
2856         if (cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS)
2857                 goto out;
2858
2859         if (status_msg &&
2860             nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_MSG,
2861                            status_msg))
2862                 goto nla_put_failure;
2863         if (component &&
2864             nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_COMPONENT,
2865                            component))
2866                 goto nla_put_failure;
2867         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE,
2868                               done, DEVLINK_ATTR_PAD))
2869                 goto nla_put_failure;
2870         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL,
2871                               total, DEVLINK_ATTR_PAD))
2872                 goto nla_put_failure;
2873
2874 out:
2875         genlmsg_end(msg, hdr);
2876         return 0;
2877
2878 nla_put_failure:
2879         genlmsg_cancel(msg, hdr);
2880         return -EMSGSIZE;
2881 }
2882
2883 static void __devlink_flash_update_notify(struct devlink *devlink,
2884                                           enum devlink_command cmd,
2885                                           const char *status_msg,
2886                                           const char *component,
2887                                           unsigned long done,
2888                                           unsigned long total)
2889 {
2890         struct sk_buff *msg;
2891         int err;
2892
2893         WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE &&
2894                 cmd != DEVLINK_CMD_FLASH_UPDATE_END &&
2895                 cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS);
2896
2897         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2898         if (!msg)
2899                 return;
2900
2901         err = devlink_nl_flash_update_fill(msg, devlink, cmd, status_msg,
2902                                            component, done, total);
2903         if (err)
2904                 goto out_free_msg;
2905
2906         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
2907                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
2908         return;
2909
2910 out_free_msg:
2911         nlmsg_free(msg);
2912 }
2913
2914 void devlink_flash_update_begin_notify(struct devlink *devlink)
2915 {
2916         __devlink_flash_update_notify(devlink,
2917                                       DEVLINK_CMD_FLASH_UPDATE,
2918                                       NULL, NULL, 0, 0);
2919 }
2920 EXPORT_SYMBOL_GPL(devlink_flash_update_begin_notify);
2921
2922 void devlink_flash_update_end_notify(struct devlink *devlink)
2923 {
2924         __devlink_flash_update_notify(devlink,
2925                                       DEVLINK_CMD_FLASH_UPDATE_END,
2926                                       NULL, NULL, 0, 0);
2927 }
2928 EXPORT_SYMBOL_GPL(devlink_flash_update_end_notify);
2929
2930 void devlink_flash_update_status_notify(struct devlink *devlink,
2931                                         const char *status_msg,
2932                                         const char *component,
2933                                         unsigned long done,
2934                                         unsigned long total)
2935 {
2936         __devlink_flash_update_notify(devlink,
2937                                       DEVLINK_CMD_FLASH_UPDATE_STATUS,
2938                                       status_msg, component, done, total);
2939 }
2940 EXPORT_SYMBOL_GPL(devlink_flash_update_status_notify);
2941
2942 static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
2943                                        struct genl_info *info)
2944 {
2945         struct devlink *devlink = info->user_ptr[0];
2946         const char *file_name, *component;
2947         struct nlattr *nla_component;
2948
2949         if (!devlink->ops->flash_update)
2950                 return -EOPNOTSUPP;
2951
2952         if (!info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME])
2953                 return -EINVAL;
2954         file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]);
2955
2956         nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT];
2957         component = nla_component ? nla_data(nla_component) : NULL;
2958
2959         return devlink->ops->flash_update(devlink, file_name, component,
2960                                           info->extack);
2961 }
2962
2963 static const struct devlink_param devlink_param_generic[] = {
2964         {
2965                 .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
2966                 .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME,
2967                 .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE,
2968         },
2969         {
2970                 .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
2971                 .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME,
2972                 .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE,
2973         },
2974         {
2975                 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
2976                 .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME,
2977                 .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE,
2978         },
2979         {
2980                 .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
2981                 .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
2982                 .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
2983         },
2984         {
2985                 .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
2986                 .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME,
2987                 .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE,
2988         },
2989         {
2990                 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
2991                 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME,
2992                 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE,
2993         },
2994         {
2995                 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
2996                 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME,
2997                 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE,
2998         },
2999         {
3000                 .id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
3001                 .name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME,
3002                 .type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE,
3003         },
3004         {
3005                 .id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE,
3006                 .name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME,
3007                 .type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE,
3008         },
3009         {
3010                 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE,
3011                 .name = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_NAME,
3012                 .type = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_TYPE,
3013         },
3014 };
3015
3016 static int devlink_param_generic_verify(const struct devlink_param *param)
3017 {
3018         /* verify it match generic parameter by id and name */
3019         if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
3020                 return -EINVAL;
3021         if (strcmp(param->name, devlink_param_generic[param->id].name))
3022                 return -ENOENT;
3023
3024         WARN_ON(param->type != devlink_param_generic[param->id].type);
3025
3026         return 0;
3027 }
3028
3029 static int devlink_param_driver_verify(const struct devlink_param *param)
3030 {
3031         int i;
3032
3033         if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
3034                 return -EINVAL;
3035         /* verify no such name in generic params */
3036         for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
3037                 if (!strcmp(param->name, devlink_param_generic[i].name))
3038                         return -EEXIST;
3039
3040         return 0;
3041 }
3042
3043 static struct devlink_param_item *
3044 devlink_param_find_by_name(struct list_head *param_list,
3045                            const char *param_name)
3046 {
3047         struct devlink_param_item *param_item;
3048
3049         list_for_each_entry(param_item, param_list, list)
3050                 if (!strcmp(param_item->param->name, param_name))
3051                         return param_item;
3052         return NULL;
3053 }
3054
3055 static struct devlink_param_item *
3056 devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
3057 {
3058         struct devlink_param_item *param_item;
3059
3060         list_for_each_entry(param_item, param_list, list)
3061                 if (param_item->param->id == param_id)
3062                         return param_item;
3063         return NULL;
3064 }
3065
3066 static bool
3067 devlink_param_cmode_is_supported(const struct devlink_param *param,
3068                                  enum devlink_param_cmode cmode)
3069 {
3070         return test_bit(cmode, &param->supported_cmodes);
3071 }
3072
3073 static int devlink_param_get(struct devlink *devlink,
3074                              const struct devlink_param *param,
3075                              struct devlink_param_gset_ctx *ctx)
3076 {
3077         if (!param->get)
3078                 return -EOPNOTSUPP;
3079         return param->get(devlink, param->id, ctx);
3080 }
3081
3082 static int devlink_param_set(struct devlink *devlink,
3083                              const struct devlink_param *param,
3084                              struct devlink_param_gset_ctx *ctx)
3085 {
3086         if (!param->set)
3087                 return -EOPNOTSUPP;
3088         return param->set(devlink, param->id, ctx);
3089 }
3090
3091 static int
3092 devlink_param_type_to_nla_type(enum devlink_param_type param_type)
3093 {
3094         switch (param_type) {
3095         case DEVLINK_PARAM_TYPE_U8:
3096                 return NLA_U8;
3097         case DEVLINK_PARAM_TYPE_U16:
3098                 return NLA_U16;
3099         case DEVLINK_PARAM_TYPE_U32:
3100                 return NLA_U32;
3101         case DEVLINK_PARAM_TYPE_STRING:
3102                 return NLA_STRING;
3103         case DEVLINK_PARAM_TYPE_BOOL:
3104                 return NLA_FLAG;
3105         default:
3106                 return -EINVAL;
3107         }
3108 }
3109
3110 static int
3111 devlink_nl_param_value_fill_one(struct sk_buff *msg,
3112                                 enum devlink_param_type type,
3113                                 enum devlink_param_cmode cmode,
3114                                 union devlink_param_value val)
3115 {
3116         struct nlattr *param_value_attr;
3117
3118         param_value_attr = nla_nest_start_noflag(msg,
3119                                                  DEVLINK_ATTR_PARAM_VALUE);
3120         if (!param_value_attr)
3121                 goto nla_put_failure;
3122
3123         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
3124                 goto value_nest_cancel;
3125
3126         switch (type) {
3127         case DEVLINK_PARAM_TYPE_U8:
3128                 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
3129                         goto value_nest_cancel;
3130                 break;
3131         case DEVLINK_PARAM_TYPE_U16:
3132                 if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
3133                         goto value_nest_cancel;
3134                 break;
3135         case DEVLINK_PARAM_TYPE_U32:
3136                 if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
3137                         goto value_nest_cancel;
3138                 break;
3139         case DEVLINK_PARAM_TYPE_STRING:
3140                 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
3141                                    val.vstr))
3142                         goto value_nest_cancel;
3143                 break;
3144         case DEVLINK_PARAM_TYPE_BOOL:
3145                 if (val.vbool &&
3146                     nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
3147                         goto value_nest_cancel;
3148                 break;
3149         }
3150
3151         nla_nest_end(msg, param_value_attr);
3152         return 0;
3153
3154 value_nest_cancel:
3155         nla_nest_cancel(msg, param_value_attr);
3156 nla_put_failure:
3157         return -EMSGSIZE;
3158 }
3159
3160 static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
3161                                  unsigned int port_index,
3162                                  struct devlink_param_item *param_item,
3163                                  enum devlink_command cmd,
3164                                  u32 portid, u32 seq, int flags)
3165 {
3166         union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
3167         bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {};
3168         const struct devlink_param *param = param_item->param;
3169         struct devlink_param_gset_ctx ctx;
3170         struct nlattr *param_values_list;
3171         struct nlattr *param_attr;
3172         int nla_type;
3173         void *hdr;
3174         int err;
3175         int i;
3176
3177         /* Get value from driver part to driverinit configuration mode */
3178         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3179                 if (!devlink_param_cmode_is_supported(param, i))
3180                         continue;
3181                 if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3182                         if (!param_item->driverinit_value_valid)
3183                                 return -EOPNOTSUPP;
3184                         param_value[i] = param_item->driverinit_value;
3185                 } else {
3186                         if (!param_item->published)
3187                                 continue;
3188                         ctx.cmode = i;
3189                         err = devlink_param_get(devlink, param, &ctx);
3190                         if (err)
3191                                 return err;
3192                         param_value[i] = ctx.val;
3193                 }
3194                 param_value_set[i] = true;
3195         }
3196
3197         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3198         if (!hdr)
3199                 return -EMSGSIZE;
3200
3201         if (devlink_nl_put_handle(msg, devlink))
3202                 goto genlmsg_cancel;
3203
3204         if (cmd == DEVLINK_CMD_PORT_PARAM_GET ||
3205             cmd == DEVLINK_CMD_PORT_PARAM_NEW ||
3206             cmd == DEVLINK_CMD_PORT_PARAM_DEL)
3207                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index))
3208                         goto genlmsg_cancel;
3209
3210         param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM);
3211         if (!param_attr)
3212                 goto genlmsg_cancel;
3213         if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
3214                 goto param_nest_cancel;
3215         if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
3216                 goto param_nest_cancel;
3217
3218         nla_type = devlink_param_type_to_nla_type(param->type);
3219         if (nla_type < 0)
3220                 goto param_nest_cancel;
3221         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
3222                 goto param_nest_cancel;
3223
3224         param_values_list = nla_nest_start_noflag(msg,
3225                                                   DEVLINK_ATTR_PARAM_VALUES_LIST);
3226         if (!param_values_list)
3227                 goto param_nest_cancel;
3228
3229         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3230                 if (!param_value_set[i])
3231                         continue;
3232                 err = devlink_nl_param_value_fill_one(msg, param->type,
3233                                                       i, param_value[i]);
3234                 if (err)
3235                         goto values_list_nest_cancel;
3236         }
3237
3238         nla_nest_end(msg, param_values_list);
3239         nla_nest_end(msg, param_attr);
3240         genlmsg_end(msg, hdr);
3241         return 0;
3242
3243 values_list_nest_cancel:
3244         nla_nest_end(msg, param_values_list);
3245 param_nest_cancel:
3246         nla_nest_cancel(msg, param_attr);
3247 genlmsg_cancel:
3248         genlmsg_cancel(msg, hdr);
3249         return -EMSGSIZE;
3250 }
3251
3252 static void devlink_param_notify(struct devlink *devlink,
3253                                  unsigned int port_index,
3254                                  struct devlink_param_item *param_item,
3255                                  enum devlink_command cmd)
3256 {
3257         struct sk_buff *msg;
3258         int err;
3259
3260         WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL &&
3261                 cmd != DEVLINK_CMD_PORT_PARAM_NEW &&
3262                 cmd != DEVLINK_CMD_PORT_PARAM_DEL);
3263
3264         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3265         if (!msg)
3266                 return;
3267         err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd,
3268                                     0, 0, 0);
3269         if (err) {
3270                 nlmsg_free(msg);
3271                 return;
3272         }
3273
3274         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3275                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3276 }
3277
3278 static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
3279                                            struct netlink_callback *cb)
3280 {
3281         struct devlink_param_item *param_item;
3282         struct devlink *devlink;
3283         int start = cb->args[0];
3284         int idx = 0;
3285         int err = 0;
3286
3287         mutex_lock(&devlink_mutex);
3288         list_for_each_entry(devlink, &devlink_list, list) {
3289                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3290                         continue;
3291                 mutex_lock(&devlink->lock);
3292                 list_for_each_entry(param_item, &devlink->param_list, list) {
3293                         if (idx < start) {
3294                                 idx++;
3295                                 continue;
3296                         }
3297                         err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3298                                                     DEVLINK_CMD_PARAM_GET,
3299                                                     NETLINK_CB(cb->skb).portid,
3300                                                     cb->nlh->nlmsg_seq,
3301                                                     NLM_F_MULTI);
3302                         if (err && err != -EOPNOTSUPP) {
3303                                 mutex_unlock(&devlink->lock);
3304                                 goto out;
3305                         }
3306                         idx++;
3307                 }
3308                 mutex_unlock(&devlink->lock);
3309         }
3310 out:
3311         mutex_unlock(&devlink_mutex);
3312
3313         if (err != -EMSGSIZE)
3314                 return err;
3315
3316         cb->args[0] = idx;
3317         return msg->len;
3318 }
3319
3320 static int
3321 devlink_param_type_get_from_info(struct genl_info *info,
3322                                  enum devlink_param_type *param_type)
3323 {
3324         if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE])
3325                 return -EINVAL;
3326
3327         switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
3328         case NLA_U8:
3329                 *param_type = DEVLINK_PARAM_TYPE_U8;
3330                 break;
3331         case NLA_U16:
3332                 *param_type = DEVLINK_PARAM_TYPE_U16;
3333                 break;
3334         case NLA_U32:
3335                 *param_type = DEVLINK_PARAM_TYPE_U32;
3336                 break;
3337         case NLA_STRING:
3338                 *param_type = DEVLINK_PARAM_TYPE_STRING;
3339                 break;
3340         case NLA_FLAG:
3341                 *param_type = DEVLINK_PARAM_TYPE_BOOL;
3342                 break;
3343         default:
3344                 return -EINVAL;
3345         }
3346
3347         return 0;
3348 }
3349
3350 static int
3351 devlink_param_value_get_from_info(const struct devlink_param *param,
3352                                   struct genl_info *info,
3353                                   union devlink_param_value *value)
3354 {
3355         int len;
3356
3357         if (param->type != DEVLINK_PARAM_TYPE_BOOL &&
3358             !info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA])
3359                 return -EINVAL;
3360
3361         switch (param->type) {
3362         case DEVLINK_PARAM_TYPE_U8:
3363                 value->vu8 = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3364                 break;
3365         case DEVLINK_PARAM_TYPE_U16:
3366                 value->vu16 = nla_get_u16(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3367                 break;
3368         case DEVLINK_PARAM_TYPE_U32:
3369                 value->vu32 = nla_get_u32(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3370                 break;
3371         case DEVLINK_PARAM_TYPE_STRING:
3372                 len = strnlen(nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]),
3373                               nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3374                 if (len == nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) ||
3375                     len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
3376                         return -EINVAL;
3377                 strcpy(value->vstr,
3378                        nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3379                 break;
3380         case DEVLINK_PARAM_TYPE_BOOL:
3381                 value->vbool = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA] ?
3382                                true : false;
3383                 break;
3384         }
3385         return 0;
3386 }
3387
3388 static struct devlink_param_item *
3389 devlink_param_get_from_info(struct list_head *param_list,
3390                             struct genl_info *info)
3391 {
3392         char *param_name;
3393
3394         if (!info->attrs[DEVLINK_ATTR_PARAM_NAME])
3395                 return NULL;
3396
3397         param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
3398         return devlink_param_find_by_name(param_list, param_name);
3399 }
3400
3401 static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
3402                                          struct genl_info *info)
3403 {
3404         struct devlink *devlink = info->user_ptr[0];
3405         struct devlink_param_item *param_item;
3406         struct sk_buff *msg;
3407         int err;
3408
3409         param_item = devlink_param_get_from_info(&devlink->param_list, info);
3410         if (!param_item)
3411                 return -EINVAL;
3412
3413         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3414         if (!msg)
3415                 return -ENOMEM;
3416
3417         err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3418                                     DEVLINK_CMD_PARAM_GET,
3419                                     info->snd_portid, info->snd_seq, 0);
3420         if (err) {
3421                 nlmsg_free(msg);
3422                 return err;
3423         }
3424
3425         return genlmsg_reply(msg, info);
3426 }
3427
3428 static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink,
3429                                            unsigned int port_index,
3430                                            struct list_head *param_list,
3431                                            struct genl_info *info,
3432                                            enum devlink_command cmd)
3433 {
3434         enum devlink_param_type param_type;
3435         struct devlink_param_gset_ctx ctx;
3436         enum devlink_param_cmode cmode;
3437         struct devlink_param_item *param_item;
3438         const struct devlink_param *param;
3439         union devlink_param_value value;
3440         int err = 0;
3441
3442         param_item = devlink_param_get_from_info(param_list, info);
3443         if (!param_item)
3444                 return -EINVAL;
3445         param = param_item->param;
3446         err = devlink_param_type_get_from_info(info, &param_type);
3447         if (err)
3448                 return err;
3449         if (param_type != param->type)
3450                 return -EINVAL;
3451         err = devlink_param_value_get_from_info(param, info, &value);
3452         if (err)
3453                 return err;
3454         if (param->validate) {
3455                 err = param->validate(devlink, param->id, value, info->extack);
3456                 if (err)
3457                         return err;
3458         }
3459
3460         if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE])
3461                 return -EINVAL;
3462         cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
3463         if (!devlink_param_cmode_is_supported(param, cmode))
3464                 return -EOPNOTSUPP;
3465
3466         if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3467                 if (param->type == DEVLINK_PARAM_TYPE_STRING)
3468                         strcpy(param_item->driverinit_value.vstr, value.vstr);
3469                 else
3470                         param_item->driverinit_value = value;
3471                 param_item->driverinit_value_valid = true;
3472         } else {
3473                 if (!param->set)
3474                         return -EOPNOTSUPP;
3475                 ctx.val = value;
3476                 ctx.cmode = cmode;
3477                 err = devlink_param_set(devlink, param, &ctx);
3478                 if (err)
3479                         return err;
3480         }
3481
3482         devlink_param_notify(devlink, port_index, param_item, cmd);
3483         return 0;
3484 }
3485
3486 static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
3487                                          struct genl_info *info)
3488 {
3489         struct devlink *devlink = info->user_ptr[0];
3490
3491         return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->param_list,
3492                                                info, DEVLINK_CMD_PARAM_NEW);
3493 }
3494
3495 static int devlink_param_register_one(struct devlink *devlink,
3496                                       unsigned int port_index,
3497                                       struct list_head *param_list,
3498                                       const struct devlink_param *param,
3499                                       enum devlink_command cmd)
3500 {
3501         struct devlink_param_item *param_item;
3502
3503         if (devlink_param_find_by_name(param_list, param->name))
3504                 return -EEXIST;
3505
3506         if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
3507                 WARN_ON(param->get || param->set);
3508         else
3509                 WARN_ON(!param->get || !param->set);
3510
3511         param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
3512         if (!param_item)
3513                 return -ENOMEM;
3514         param_item->param = param;
3515
3516         list_add_tail(&param_item->list, param_list);
3517         devlink_param_notify(devlink, port_index, param_item, cmd);
3518         return 0;
3519 }
3520
3521 static void devlink_param_unregister_one(struct devlink *devlink,
3522                                          unsigned int port_index,
3523                                          struct list_head *param_list,
3524                                          const struct devlink_param *param,
3525                                          enum devlink_command cmd)
3526 {
3527         struct devlink_param_item *param_item;
3528
3529         param_item = devlink_param_find_by_name(param_list, param->name);
3530         WARN_ON(!param_item);
3531         devlink_param_notify(devlink, port_index, param_item, cmd);
3532         list_del(&param_item->list);
3533         kfree(param_item);
3534 }
3535
3536 static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg,
3537                                                 struct netlink_callback *cb)
3538 {
3539         struct devlink_param_item *param_item;
3540         struct devlink_port *devlink_port;
3541         struct devlink *devlink;
3542         int start = cb->args[0];
3543         int idx = 0;
3544         int err = 0;
3545
3546         mutex_lock(&devlink_mutex);
3547         list_for_each_entry(devlink, &devlink_list, list) {
3548                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3549                         continue;
3550                 mutex_lock(&devlink->lock);
3551                 list_for_each_entry(devlink_port, &devlink->port_list, list) {
3552                         list_for_each_entry(param_item,
3553                                             &devlink_port->param_list, list) {
3554                                 if (idx < start) {
3555                                         idx++;
3556                                         continue;
3557                                 }
3558                                 err = devlink_nl_param_fill(msg,
3559                                                 devlink_port->devlink,
3560                                                 devlink_port->index, param_item,
3561                                                 DEVLINK_CMD_PORT_PARAM_GET,
3562                                                 NETLINK_CB(cb->skb).portid,
3563                                                 cb->nlh->nlmsg_seq,
3564                                                 NLM_F_MULTI);
3565                                 if (err && err != -EOPNOTSUPP) {
3566                                         mutex_unlock(&devlink->lock);
3567                                         goto out;
3568                                 }
3569                                 idx++;
3570                         }
3571                 }
3572                 mutex_unlock(&devlink->lock);
3573         }
3574 out:
3575         mutex_unlock(&devlink_mutex);
3576
3577         if (err != -EMSGSIZE)
3578                 return err;
3579
3580         cb->args[0] = idx;
3581         return msg->len;
3582 }
3583
3584 static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
3585                                               struct genl_info *info)
3586 {
3587         struct devlink_port *devlink_port = info->user_ptr[0];
3588         struct devlink_param_item *param_item;
3589         struct sk_buff *msg;
3590         int err;
3591
3592         param_item = devlink_param_get_from_info(&devlink_port->param_list,
3593                                                  info);
3594         if (!param_item)
3595                 return -EINVAL;
3596
3597         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3598         if (!msg)
3599                 return -ENOMEM;
3600
3601         err = devlink_nl_param_fill(msg, devlink_port->devlink,
3602                                     devlink_port->index, param_item,
3603                                     DEVLINK_CMD_PORT_PARAM_GET,
3604                                     info->snd_portid, info->snd_seq, 0);
3605         if (err) {
3606                 nlmsg_free(msg);
3607                 return err;
3608         }
3609
3610         return genlmsg_reply(msg, info);
3611 }
3612
3613 static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
3614                                               struct genl_info *info)
3615 {
3616         struct devlink_port *devlink_port = info->user_ptr[0];
3617
3618         return __devlink_nl_cmd_param_set_doit(devlink_port->devlink,
3619                                                devlink_port->index,
3620                                                &devlink_port->param_list, info,
3621                                                DEVLINK_CMD_PORT_PARAM_NEW);
3622 }
3623
3624 static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
3625                                              struct devlink *devlink,
3626                                              struct devlink_snapshot *snapshot)
3627 {
3628         struct nlattr *snap_attr;
3629         int err;
3630
3631         snap_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
3632         if (!snap_attr)
3633                 return -EINVAL;
3634
3635         err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
3636         if (err)
3637                 goto nla_put_failure;
3638
3639         nla_nest_end(msg, snap_attr);
3640         return 0;
3641
3642 nla_put_failure:
3643         nla_nest_cancel(msg, snap_attr);
3644         return err;
3645 }
3646
3647 static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
3648                                               struct devlink *devlink,
3649                                               struct devlink_region *region)
3650 {
3651         struct devlink_snapshot *snapshot;
3652         struct nlattr *snapshots_attr;
3653         int err;
3654
3655         snapshots_attr = nla_nest_start_noflag(msg,
3656                                                DEVLINK_ATTR_REGION_SNAPSHOTS);
3657         if (!snapshots_attr)
3658                 return -EINVAL;
3659
3660         list_for_each_entry(snapshot, &region->snapshot_list, list) {
3661                 err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
3662                 if (err)
3663                         goto nla_put_failure;
3664         }
3665
3666         nla_nest_end(msg, snapshots_attr);
3667         return 0;
3668
3669 nla_put_failure:
3670         nla_nest_cancel(msg, snapshots_attr);
3671         return err;
3672 }
3673
3674 static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
3675                                   enum devlink_command cmd, u32 portid,
3676                                   u32 seq, int flags,
3677                                   struct devlink_region *region)
3678 {
3679         void *hdr;
3680         int err;
3681
3682         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3683         if (!hdr)
3684                 return -EMSGSIZE;
3685
3686         err = devlink_nl_put_handle(msg, devlink);
3687         if (err)
3688                 goto nla_put_failure;
3689
3690         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->name);
3691         if (err)
3692                 goto nla_put_failure;
3693
3694         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3695                                 region->size,
3696                                 DEVLINK_ATTR_PAD);
3697         if (err)
3698                 goto nla_put_failure;
3699
3700         err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
3701         if (err)
3702                 goto nla_put_failure;
3703
3704         genlmsg_end(msg, hdr);
3705         return 0;
3706
3707 nla_put_failure:
3708         genlmsg_cancel(msg, hdr);
3709         return err;
3710 }
3711
3712 static void devlink_nl_region_notify(struct devlink_region *region,
3713                                      struct devlink_snapshot *snapshot,
3714                                      enum devlink_command cmd)
3715 {
3716         struct devlink *devlink = region->devlink;
3717         struct sk_buff *msg;
3718         void *hdr;
3719         int err;
3720
3721         WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
3722
3723         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3724         if (!msg)
3725                 return;
3726
3727         hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
3728         if (!hdr)
3729                 goto out_free_msg;
3730
3731         err = devlink_nl_put_handle(msg, devlink);
3732         if (err)
3733                 goto out_cancel_msg;
3734
3735         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
3736                              region->name);
3737         if (err)
3738                 goto out_cancel_msg;
3739
3740         if (snapshot) {
3741                 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
3742                                   snapshot->id);
3743                 if (err)
3744                         goto out_cancel_msg;
3745         } else {
3746                 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3747                                         region->size, DEVLINK_ATTR_PAD);
3748                 if (err)
3749                         goto out_cancel_msg;
3750         }
3751         genlmsg_end(msg, hdr);
3752
3753         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3754                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3755
3756         return;
3757
3758 out_cancel_msg:
3759         genlmsg_cancel(msg, hdr);
3760 out_free_msg:
3761         nlmsg_free(msg);
3762 }
3763
3764 static void devlink_region_snapshot_del(struct devlink_region *region,
3765                                         struct devlink_snapshot *snapshot)
3766 {
3767         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
3768         region->cur_snapshots--;
3769         list_del(&snapshot->list);
3770         (*snapshot->data_destructor)(snapshot->data);
3771         kfree(snapshot);
3772 }
3773
3774 static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
3775                                           struct genl_info *info)
3776 {
3777         struct devlink *devlink = info->user_ptr[0];
3778         struct devlink_region *region;
3779         const char *region_name;
3780         struct sk_buff *msg;
3781         int err;
3782
3783         if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
3784                 return -EINVAL;
3785
3786         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3787         region = devlink_region_get_by_name(devlink, region_name);
3788         if (!region)
3789                 return -EINVAL;
3790
3791         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3792         if (!msg)
3793                 return -ENOMEM;
3794
3795         err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
3796                                      info->snd_portid, info->snd_seq, 0,
3797                                      region);
3798         if (err) {
3799                 nlmsg_free(msg);
3800                 return err;
3801         }
3802
3803         return genlmsg_reply(msg, info);
3804 }
3805
3806 static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
3807                                             struct netlink_callback *cb)
3808 {
3809         struct devlink_region *region;
3810         struct devlink *devlink;
3811         int start = cb->args[0];
3812         int idx = 0;
3813         int err;
3814
3815         mutex_lock(&devlink_mutex);
3816         list_for_each_entry(devlink, &devlink_list, list) {
3817                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3818                         continue;
3819
3820                 mutex_lock(&devlink->lock);
3821                 list_for_each_entry(region, &devlink->region_list, list) {
3822                         if (idx < start) {
3823                                 idx++;
3824                                 continue;
3825                         }
3826                         err = devlink_nl_region_fill(msg, devlink,
3827                                                      DEVLINK_CMD_REGION_GET,
3828                                                      NETLINK_CB(cb->skb).portid,
3829                                                      cb->nlh->nlmsg_seq,
3830                                                      NLM_F_MULTI, region);
3831                         if (err) {
3832                                 mutex_unlock(&devlink->lock);
3833                                 goto out;
3834                         }
3835                         idx++;
3836                 }
3837                 mutex_unlock(&devlink->lock);
3838         }
3839 out:
3840         mutex_unlock(&devlink_mutex);
3841         cb->args[0] = idx;
3842         return msg->len;
3843 }
3844
3845 static int devlink_nl_cmd_region_del(struct sk_buff *skb,
3846                                      struct genl_info *info)
3847 {
3848         struct devlink *devlink = info->user_ptr[0];
3849         struct devlink_snapshot *snapshot;
3850         struct devlink_region *region;
3851         const char *region_name;
3852         u32 snapshot_id;
3853
3854         if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
3855             !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
3856                 return -EINVAL;
3857
3858         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3859         snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3860
3861         region = devlink_region_get_by_name(devlink, region_name);
3862         if (!region)
3863                 return -EINVAL;
3864
3865         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3866         if (!snapshot)
3867                 return -EINVAL;
3868
3869         devlink_region_snapshot_del(region, snapshot);
3870         return 0;
3871 }
3872
3873 static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
3874                                                  struct devlink *devlink,
3875                                                  u8 *chunk, u32 chunk_size,
3876                                                  u64 addr)
3877 {
3878         struct nlattr *chunk_attr;
3879         int err;
3880
3881         chunk_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_CHUNK);
3882         if (!chunk_attr)
3883                 return -EINVAL;
3884
3885         err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
3886         if (err)
3887                 goto nla_put_failure;
3888
3889         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
3890                                 DEVLINK_ATTR_PAD);
3891         if (err)
3892                 goto nla_put_failure;
3893
3894         nla_nest_end(msg, chunk_attr);
3895         return 0;
3896
3897 nla_put_failure:
3898         nla_nest_cancel(msg, chunk_attr);
3899         return err;
3900 }
3901
3902 #define DEVLINK_REGION_READ_CHUNK_SIZE 256
3903
3904 static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
3905                                                 struct devlink *devlink,
3906                                                 struct devlink_region *region,
3907                                                 struct nlattr **attrs,
3908                                                 u64 start_offset,
3909                                                 u64 end_offset,
3910                                                 bool dump,
3911                                                 u64 *new_offset)
3912 {
3913         struct devlink_snapshot *snapshot;
3914         u64 curr_offset = start_offset;
3915         u32 snapshot_id;
3916         int err = 0;
3917
3918         *new_offset = start_offset;
3919
3920         snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3921         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3922         if (!snapshot)
3923                 return -EINVAL;
3924
3925         if (end_offset > region->size || dump)
3926                 end_offset = region->size;
3927
3928         while (curr_offset < end_offset) {
3929                 u32 data_size;
3930                 u8 *data;
3931
3932                 if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
3933                         data_size = end_offset - curr_offset;
3934                 else
3935                         data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
3936
3937                 data = &snapshot->data[curr_offset];
3938                 err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
3939                                                             data, data_size,
3940                                                             curr_offset);
3941                 if (err)
3942                         break;
3943
3944                 curr_offset += data_size;
3945         }
3946         *new_offset = curr_offset;
3947
3948         return err;
3949 }
3950
3951 static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
3952                                              struct netlink_callback *cb)
3953 {
3954         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
3955         u64 ret_offset, start_offset, end_offset = 0;
3956         struct nlattr **attrs = info->attrs;
3957         struct devlink_region *region;
3958         struct nlattr *chunks_attr;
3959         const char *region_name;
3960         struct devlink *devlink;
3961         bool dump = true;
3962         void *hdr;
3963         int err;
3964
3965         start_offset = *((u64 *)&cb->args[0]);
3966
3967         mutex_lock(&devlink_mutex);
3968         devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
3969         if (IS_ERR(devlink)) {
3970                 err = PTR_ERR(devlink);
3971                 goto out_dev;
3972         }
3973
3974         mutex_lock(&devlink->lock);
3975
3976         if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
3977             !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
3978                 err = -EINVAL;
3979                 goto out_unlock;
3980         }
3981
3982         region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
3983         region = devlink_region_get_by_name(devlink, region_name);
3984         if (!region) {
3985                 err = -EINVAL;
3986                 goto out_unlock;
3987         }
3988
3989         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3990                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
3991                           DEVLINK_CMD_REGION_READ);
3992         if (!hdr) {
3993                 err = -EMSGSIZE;
3994                 goto out_unlock;
3995         }
3996
3997         err = devlink_nl_put_handle(skb, devlink);
3998         if (err)
3999                 goto nla_put_failure;
4000
4001         err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
4002         if (err)
4003                 goto nla_put_failure;
4004
4005         chunks_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_REGION_CHUNKS);
4006         if (!chunks_attr) {
4007                 err = -EMSGSIZE;
4008                 goto nla_put_failure;
4009         }
4010
4011         if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
4012             attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
4013                 if (!start_offset)
4014                         start_offset =
4015                                 nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4016
4017                 end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4018                 end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
4019                 dump = false;
4020         }
4021
4022         err = devlink_nl_region_read_snapshot_fill(skb, devlink,
4023                                                    region, attrs,
4024                                                    start_offset,
4025                                                    end_offset, dump,
4026                                                    &ret_offset);
4027
4028         if (err && err != -EMSGSIZE)
4029                 goto nla_put_failure;
4030
4031         /* Check if there was any progress done to prevent infinite loop */
4032         if (ret_offset == start_offset) {
4033                 err = -EINVAL;
4034                 goto nla_put_failure;
4035         }
4036
4037         *((u64 *)&cb->args[0]) = ret_offset;
4038
4039         nla_nest_end(skb, chunks_attr);
4040         genlmsg_end(skb, hdr);
4041         mutex_unlock(&devlink->lock);
4042         mutex_unlock(&devlink_mutex);
4043
4044         return skb->len;
4045
4046 nla_put_failure:
4047         genlmsg_cancel(skb, hdr);
4048 out_unlock:
4049         mutex_unlock(&devlink->lock);
4050 out_dev:
4051         mutex_unlock(&devlink_mutex);
4052         return err;
4053 }
4054
4055 struct devlink_info_req {
4056         struct sk_buff *msg;
4057 };
4058
4059 int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name)
4060 {
4061         return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name);
4062 }
4063 EXPORT_SYMBOL_GPL(devlink_info_driver_name_put);
4064
4065 int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
4066 {
4067         return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn);
4068 }
4069 EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
4070
4071 static int devlink_info_version_put(struct devlink_info_req *req, int attr,
4072                                     const char *version_name,
4073                                     const char *version_value)
4074 {
4075         struct nlattr *nest;
4076         int err;
4077
4078         nest = nla_nest_start_noflag(req->msg, attr);
4079         if (!nest)
4080                 return -EMSGSIZE;
4081
4082         err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME,
4083                              version_name);
4084         if (err)
4085                 goto nla_put_failure;
4086
4087         err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE,
4088                              version_value);
4089         if (err)
4090                 goto nla_put_failure;
4091
4092         nla_nest_end(req->msg, nest);
4093
4094         return 0;
4095
4096 nla_put_failure:
4097         nla_nest_cancel(req->msg, nest);
4098         return err;
4099 }
4100
4101 int devlink_info_version_fixed_put(struct devlink_info_req *req,
4102                                    const char *version_name,
4103                                    const char *version_value)
4104 {
4105         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED,
4106                                         version_name, version_value);
4107 }
4108 EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
4109
4110 int devlink_info_version_stored_put(struct devlink_info_req *req,
4111                                     const char *version_name,
4112                                     const char *version_value)
4113 {
4114         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
4115                                         version_name, version_value);
4116 }
4117 EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
4118
4119 int devlink_info_version_running_put(struct devlink_info_req *req,
4120                                      const char *version_name,
4121                                      const char *version_value)
4122 {
4123         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
4124                                         version_name, version_value);
4125 }
4126 EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
4127
4128 static int
4129 devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
4130                      enum devlink_command cmd, u32 portid,
4131                      u32 seq, int flags, struct netlink_ext_ack *extack)
4132 {
4133         struct devlink_info_req req;
4134         void *hdr;
4135         int err;
4136
4137         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4138         if (!hdr)
4139                 return -EMSGSIZE;
4140
4141         err = -EMSGSIZE;
4142         if (devlink_nl_put_handle(msg, devlink))
4143                 goto err_cancel_msg;
4144
4145         req.msg = msg;
4146         err = devlink->ops->info_get(devlink, &req, extack);
4147         if (err)
4148                 goto err_cancel_msg;
4149
4150         genlmsg_end(msg, hdr);
4151         return 0;
4152
4153 err_cancel_msg:
4154         genlmsg_cancel(msg, hdr);
4155         return err;
4156 }
4157
4158 static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb,
4159                                         struct genl_info *info)
4160 {
4161         struct devlink *devlink = info->user_ptr[0];
4162         struct sk_buff *msg;
4163         int err;
4164
4165         if (!devlink->ops->info_get)
4166                 return -EOPNOTSUPP;
4167
4168         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4169         if (!msg)
4170                 return -ENOMEM;
4171
4172         err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4173                                    info->snd_portid, info->snd_seq, 0,
4174                                    info->extack);
4175         if (err) {
4176                 nlmsg_free(msg);
4177                 return err;
4178         }
4179
4180         return genlmsg_reply(msg, info);
4181 }
4182
4183 static int devlink_nl_cmd_info_get_dumpit(struct sk_buff *msg,
4184                                           struct netlink_callback *cb)
4185 {
4186         struct devlink *devlink;
4187         int start = cb->args[0];
4188         int idx = 0;
4189         int err = 0;
4190
4191         mutex_lock(&devlink_mutex);
4192         list_for_each_entry(devlink, &devlink_list, list) {
4193                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4194                         continue;
4195                 if (idx < start) {
4196                         idx++;
4197                         continue;
4198                 }
4199
4200                 if (!devlink->ops->info_get) {
4201                         idx++;
4202                         continue;
4203                 }
4204
4205                 mutex_lock(&devlink->lock);
4206                 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4207                                            NETLINK_CB(cb->skb).portid,
4208                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
4209                                            cb->extack);
4210                 mutex_unlock(&devlink->lock);
4211                 if (err && err != -EOPNOTSUPP)
4212                         break;
4213                 idx++;
4214         }
4215         mutex_unlock(&devlink_mutex);
4216
4217         if (err != -EMSGSIZE)
4218                 return err;
4219
4220         cb->args[0] = idx;
4221         return msg->len;
4222 }
4223
4224 struct devlink_fmsg_item {
4225         struct list_head list;
4226         int attrtype;
4227         u8 nla_type;
4228         u16 len;
4229         int value[0];
4230 };
4231
4232 struct devlink_fmsg {
4233         struct list_head item_list;
4234 };
4235
4236 static struct devlink_fmsg *devlink_fmsg_alloc(void)
4237 {
4238         struct devlink_fmsg *fmsg;
4239
4240         fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
4241         if (!fmsg)
4242                 return NULL;
4243
4244         INIT_LIST_HEAD(&fmsg->item_list);
4245
4246         return fmsg;
4247 }
4248
4249 static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
4250 {
4251         struct devlink_fmsg_item *item, *tmp;
4252
4253         list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
4254                 list_del(&item->list);
4255                 kfree(item);
4256         }
4257         kfree(fmsg);
4258 }
4259
4260 static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
4261                                     int attrtype)
4262 {
4263         struct devlink_fmsg_item *item;
4264
4265         item = kzalloc(sizeof(*item), GFP_KERNEL);
4266         if (!item)
4267                 return -ENOMEM;
4268
4269         item->attrtype = attrtype;
4270         list_add_tail(&item->list, &fmsg->item_list);
4271
4272         return 0;
4273 }
4274
4275 int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
4276 {
4277         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
4278 }
4279 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
4280
4281 static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
4282 {
4283         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
4284 }
4285
4286 int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
4287 {
4288         return devlink_fmsg_nest_end(fmsg);
4289 }
4290 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
4291
4292 #define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
4293
4294 static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
4295 {
4296         struct devlink_fmsg_item *item;
4297
4298         if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
4299                 return -EMSGSIZE;
4300
4301         item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
4302         if (!item)
4303                 return -ENOMEM;
4304
4305         item->nla_type = NLA_NUL_STRING;
4306         item->len = strlen(name) + 1;
4307         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
4308         memcpy(&item->value, name, item->len);
4309         list_add_tail(&item->list, &fmsg->item_list);
4310
4311         return 0;
4312 }
4313
4314 int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
4315 {
4316         int err;
4317
4318         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
4319         if (err)
4320                 return err;
4321
4322         err = devlink_fmsg_put_name(fmsg, name);
4323         if (err)
4324                 return err;
4325
4326         return 0;
4327 }
4328 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
4329
4330 int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
4331 {
4332         return devlink_fmsg_nest_end(fmsg);
4333 }
4334 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
4335
4336 int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
4337                                      const char *name)
4338 {
4339         int err;
4340
4341         err = devlink_fmsg_pair_nest_start(fmsg, name);
4342         if (err)
4343                 return err;
4344
4345         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
4346         if (err)
4347                 return err;
4348
4349         return 0;
4350 }
4351 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
4352
4353 int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
4354 {
4355         int err;
4356
4357         err = devlink_fmsg_nest_end(fmsg);
4358         if (err)
4359                 return err;
4360
4361         err = devlink_fmsg_nest_end(fmsg);
4362         if (err)
4363                 return err;
4364
4365         return 0;
4366 }
4367 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
4368
4369 static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
4370                                   const void *value, u16 value_len,
4371                                   u8 value_nla_type)
4372 {
4373         struct devlink_fmsg_item *item;
4374
4375         if (value_len > DEVLINK_FMSG_MAX_SIZE)
4376                 return -EMSGSIZE;
4377
4378         item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
4379         if (!item)
4380                 return -ENOMEM;
4381
4382         item->nla_type = value_nla_type;
4383         item->len = value_len;
4384         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4385         memcpy(&item->value, value, item->len);
4386         list_add_tail(&item->list, &fmsg->item_list);
4387
4388         return 0;
4389 }
4390
4391 int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
4392 {
4393         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
4394 }
4395 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
4396
4397 int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
4398 {
4399         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
4400 }
4401 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
4402
4403 int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
4404 {
4405         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
4406 }
4407 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
4408
4409 int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
4410 {
4411         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
4412 }
4413 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
4414
4415 int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
4416 {
4417         return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
4418                                       NLA_NUL_STRING);
4419 }
4420 EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
4421
4422 static int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
4423                                    u16 value_len)
4424 {
4425         return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
4426 }
4427
4428 int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
4429                                bool value)
4430 {
4431         int err;
4432
4433         err = devlink_fmsg_pair_nest_start(fmsg, name);
4434         if (err)
4435                 return err;
4436
4437         err = devlink_fmsg_bool_put(fmsg, value);
4438         if (err)
4439                 return err;
4440
4441         err = devlink_fmsg_pair_nest_end(fmsg);
4442         if (err)
4443                 return err;
4444
4445         return 0;
4446 }
4447 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
4448
4449 int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
4450                              u8 value)
4451 {
4452         int err;
4453
4454         err = devlink_fmsg_pair_nest_start(fmsg, name);
4455         if (err)
4456                 return err;
4457
4458         err = devlink_fmsg_u8_put(fmsg, value);
4459         if (err)
4460                 return err;
4461
4462         err = devlink_fmsg_pair_nest_end(fmsg);
4463         if (err)
4464                 return err;
4465
4466         return 0;
4467 }
4468 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
4469
4470 int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
4471                               u32 value)
4472 {
4473         int err;
4474
4475         err = devlink_fmsg_pair_nest_start(fmsg, name);
4476         if (err)
4477                 return err;
4478
4479         err = devlink_fmsg_u32_put(fmsg, value);
4480         if (err)
4481                 return err;
4482
4483         err = devlink_fmsg_pair_nest_end(fmsg);
4484         if (err)
4485                 return err;
4486
4487         return 0;
4488 }
4489 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
4490
4491 int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
4492                               u64 value)
4493 {
4494         int err;
4495
4496         err = devlink_fmsg_pair_nest_start(fmsg, name);
4497         if (err)
4498                 return err;
4499
4500         err = devlink_fmsg_u64_put(fmsg, value);
4501         if (err)
4502                 return err;
4503
4504         err = devlink_fmsg_pair_nest_end(fmsg);
4505         if (err)
4506                 return err;
4507
4508         return 0;
4509 }
4510 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
4511
4512 int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
4513                                  const char *value)
4514 {
4515         int err;
4516
4517         err = devlink_fmsg_pair_nest_start(fmsg, name);
4518         if (err)
4519                 return err;
4520
4521         err = devlink_fmsg_string_put(fmsg, value);
4522         if (err)
4523                 return err;
4524
4525         err = devlink_fmsg_pair_nest_end(fmsg);
4526         if (err)
4527                 return err;
4528
4529         return 0;
4530 }
4531 EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
4532
4533 int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
4534                                  const void *value, u32 value_len)
4535 {
4536         u32 data_size;
4537         u32 offset;
4538         int err;
4539
4540         err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
4541         if (err)
4542                 return err;
4543
4544         for (offset = 0; offset < value_len; offset += data_size) {
4545                 data_size = value_len - offset;
4546                 if (data_size > DEVLINK_FMSG_MAX_SIZE)
4547                         data_size = DEVLINK_FMSG_MAX_SIZE;
4548                 err = devlink_fmsg_binary_put(fmsg, value + offset, data_size);
4549                 if (err)
4550                         return err;
4551         }
4552
4553         err = devlink_fmsg_arr_pair_nest_end(fmsg);
4554         if (err)
4555                 return err;
4556
4557         return 0;
4558 }
4559 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
4560
4561 static int
4562 devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4563 {
4564         switch (msg->nla_type) {
4565         case NLA_FLAG:
4566         case NLA_U8:
4567         case NLA_U32:
4568         case NLA_U64:
4569         case NLA_NUL_STRING:
4570         case NLA_BINARY:
4571                 return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
4572                                   msg->nla_type);
4573         default:
4574                 return -EINVAL;
4575         }
4576 }
4577
4578 static int
4579 devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4580 {
4581         int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4582         u8 tmp;
4583
4584         switch (msg->nla_type) {
4585         case NLA_FLAG:
4586                 /* Always provide flag data, regardless of its value */
4587                 tmp = *(bool *) msg->value;
4588
4589                 return nla_put_u8(skb, attrtype, tmp);
4590         case NLA_U8:
4591                 return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
4592         case NLA_U32:
4593                 return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
4594         case NLA_U64:
4595                 return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
4596                                          DEVLINK_ATTR_PAD);
4597         case NLA_NUL_STRING:
4598                 return nla_put_string(skb, attrtype, (char *) &msg->value);
4599         case NLA_BINARY:
4600                 return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
4601         default:
4602                 return -EINVAL;
4603         }
4604 }
4605
4606 static int
4607 devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4608                          int *start)
4609 {
4610         struct devlink_fmsg_item *item;
4611         struct nlattr *fmsg_nlattr;
4612         int i = 0;
4613         int err;
4614
4615         fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
4616         if (!fmsg_nlattr)
4617                 return -EMSGSIZE;
4618
4619         list_for_each_entry(item, &fmsg->item_list, list) {
4620                 if (i < *start) {
4621                         i++;
4622                         continue;
4623                 }
4624
4625                 switch (item->attrtype) {
4626                 case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
4627                 case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
4628                 case DEVLINK_ATTR_FMSG_ARR_NEST_START:
4629                 case DEVLINK_ATTR_FMSG_NEST_END:
4630                         err = nla_put_flag(skb, item->attrtype);
4631                         break;
4632                 case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
4633                         err = devlink_fmsg_item_fill_type(item, skb);
4634                         if (err)
4635                                 break;
4636                         err = devlink_fmsg_item_fill_data(item, skb);
4637                         break;
4638                 case DEVLINK_ATTR_FMSG_OBJ_NAME:
4639                         err = nla_put_string(skb, item->attrtype,
4640                                              (char *) &item->value);
4641                         break;
4642                 default:
4643                         err = -EINVAL;
4644                         break;
4645                 }
4646                 if (!err)
4647                         *start = ++i;
4648                 else
4649                         break;
4650         }
4651
4652         nla_nest_end(skb, fmsg_nlattr);
4653         return err;
4654 }
4655
4656 static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
4657                             struct genl_info *info,
4658                             enum devlink_command cmd, int flags)
4659 {
4660         struct nlmsghdr *nlh;
4661         struct sk_buff *skb;
4662         bool last = false;
4663         int index = 0;
4664         void *hdr;
4665         int err;
4666
4667         while (!last) {
4668                 int tmp_index = index;
4669
4670                 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4671                 if (!skb)
4672                         return -ENOMEM;
4673
4674                 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
4675                                   &devlink_nl_family, flags | NLM_F_MULTI, cmd);
4676                 if (!hdr) {
4677                         err = -EMSGSIZE;
4678                         goto nla_put_failure;
4679                 }
4680
4681                 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
4682                 if (!err)
4683                         last = true;
4684                 else if (err != -EMSGSIZE || tmp_index == index)
4685                         goto nla_put_failure;
4686
4687                 genlmsg_end(skb, hdr);
4688                 err = genlmsg_reply(skb, info);
4689                 if (err)
4690                         return err;
4691         }
4692
4693         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4694         if (!skb)
4695                 return -ENOMEM;
4696         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
4697                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
4698         if (!nlh) {
4699                 err = -EMSGSIZE;
4700                 goto nla_put_failure;
4701         }
4702
4703         return genlmsg_reply(skb, info);
4704
4705 nla_put_failure:
4706         nlmsg_free(skb);
4707         return err;
4708 }
4709
4710 static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4711                                struct netlink_callback *cb,
4712                                enum devlink_command cmd)
4713 {
4714         int index = cb->args[0];
4715         int tmp_index = index;
4716         void *hdr;
4717         int err;
4718
4719         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
4720                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
4721         if (!hdr) {
4722                 err = -EMSGSIZE;
4723                 goto nla_put_failure;
4724         }
4725
4726         err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
4727         if ((err && err != -EMSGSIZE) || tmp_index == index)
4728                 goto nla_put_failure;
4729
4730         cb->args[0] = index;
4731         genlmsg_end(skb, hdr);
4732         return skb->len;
4733
4734 nla_put_failure:
4735         genlmsg_cancel(skb, hdr);
4736         return err;
4737 }
4738
4739 struct devlink_health_reporter {
4740         struct list_head list;
4741         void *priv;
4742         const struct devlink_health_reporter_ops *ops;
4743         struct devlink *devlink;
4744         struct devlink_fmsg *dump_fmsg;
4745         struct mutex dump_lock; /* lock parallel read/write from dump buffers */
4746         u64 graceful_period;
4747         bool auto_recover;
4748         u8 health_state;
4749         u64 dump_ts;
4750         u64 dump_real_ts;
4751         u64 error_count;
4752         u64 recovery_count;
4753         u64 last_recovery_ts;
4754         refcount_t refcount;
4755 };
4756
4757 void *
4758 devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
4759 {
4760         return reporter->priv;
4761 }
4762 EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
4763
4764 static struct devlink_health_reporter *
4765 devlink_health_reporter_find_by_name(struct devlink *devlink,
4766                                      const char *reporter_name)
4767 {
4768         struct devlink_health_reporter *reporter;
4769
4770         lockdep_assert_held(&devlink->reporters_lock);
4771         list_for_each_entry(reporter, &devlink->reporter_list, list)
4772                 if (!strcmp(reporter->ops->name, reporter_name))
4773                         return reporter;
4774         return NULL;
4775 }
4776
4777 /**
4778  *      devlink_health_reporter_create - create devlink health reporter
4779  *
4780  *      @devlink: devlink
4781  *      @ops: ops
4782  *      @graceful_period: to avoid recovery loops, in msecs
4783  *      @auto_recover: auto recover when error occurs
4784  *      @priv: priv
4785  */
4786 struct devlink_health_reporter *
4787 devlink_health_reporter_create(struct devlink *devlink,
4788                                const struct devlink_health_reporter_ops *ops,
4789                                u64 graceful_period, bool auto_recover,
4790                                void *priv)
4791 {
4792         struct devlink_health_reporter *reporter;
4793
4794         mutex_lock(&devlink->reporters_lock);
4795         if (devlink_health_reporter_find_by_name(devlink, ops->name)) {
4796                 reporter = ERR_PTR(-EEXIST);
4797                 goto unlock;
4798         }
4799
4800         if (WARN_ON(auto_recover && !ops->recover) ||
4801             WARN_ON(graceful_period && !ops->recover)) {
4802                 reporter = ERR_PTR(-EINVAL);
4803                 goto unlock;
4804         }
4805
4806         reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
4807         if (!reporter) {
4808                 reporter = ERR_PTR(-ENOMEM);
4809                 goto unlock;
4810         }
4811
4812         reporter->priv = priv;
4813         reporter->ops = ops;
4814         reporter->devlink = devlink;
4815         reporter->graceful_period = graceful_period;
4816         reporter->auto_recover = auto_recover;
4817         mutex_init(&reporter->dump_lock);
4818         refcount_set(&reporter->refcount, 1);
4819         list_add_tail(&reporter->list, &devlink->reporter_list);
4820 unlock:
4821         mutex_unlock(&devlink->reporters_lock);
4822         return reporter;
4823 }
4824 EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
4825
4826 /**
4827  *      devlink_health_reporter_destroy - destroy devlink health reporter
4828  *
4829  *      @reporter: devlink health reporter to destroy
4830  */
4831 void
4832 devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
4833 {
4834         mutex_lock(&reporter->devlink->reporters_lock);
4835         list_del(&reporter->list);
4836         mutex_unlock(&reporter->devlink->reporters_lock);
4837         while (refcount_read(&reporter->refcount) > 1)
4838                 msleep(100);
4839         mutex_destroy(&reporter->dump_lock);
4840         if (reporter->dump_fmsg)
4841                 devlink_fmsg_free(reporter->dump_fmsg);
4842         kfree(reporter);
4843 }
4844 EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
4845
4846 static int
4847 devlink_nl_health_reporter_fill(struct sk_buff *msg,
4848                                 struct devlink *devlink,
4849                                 struct devlink_health_reporter *reporter,
4850                                 enum devlink_command cmd, u32 portid,
4851                                 u32 seq, int flags)
4852 {
4853         struct nlattr *reporter_attr;
4854         void *hdr;
4855
4856         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4857         if (!hdr)
4858                 return -EMSGSIZE;
4859
4860         if (devlink_nl_put_handle(msg, devlink))
4861                 goto genlmsg_cancel;
4862
4863         reporter_attr = nla_nest_start_noflag(msg,
4864                                               DEVLINK_ATTR_HEALTH_REPORTER);
4865         if (!reporter_attr)
4866                 goto genlmsg_cancel;
4867         if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
4868                            reporter->ops->name))
4869                 goto reporter_nest_cancel;
4870         if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
4871                        reporter->health_state))
4872                 goto reporter_nest_cancel;
4873         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
4874                               reporter->error_count, DEVLINK_ATTR_PAD))
4875                 goto reporter_nest_cancel;
4876         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
4877                               reporter->recovery_count, DEVLINK_ATTR_PAD))
4878                 goto reporter_nest_cancel;
4879         if (reporter->ops->recover &&
4880             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
4881                               reporter->graceful_period,
4882                               DEVLINK_ATTR_PAD))
4883                 goto reporter_nest_cancel;
4884         if (reporter->ops->recover &&
4885             nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
4886                        reporter->auto_recover))
4887                 goto reporter_nest_cancel;
4888         if (reporter->dump_fmsg &&
4889             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
4890                               jiffies_to_msecs(reporter->dump_ts),
4891                               DEVLINK_ATTR_PAD))
4892                 goto reporter_nest_cancel;
4893         if (reporter->dump_fmsg &&
4894             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS_NS,
4895                               reporter->dump_real_ts, DEVLINK_ATTR_PAD))
4896                 goto reporter_nest_cancel;
4897
4898         nla_nest_end(msg, reporter_attr);
4899         genlmsg_end(msg, hdr);
4900         return 0;
4901
4902 reporter_nest_cancel:
4903         nla_nest_end(msg, reporter_attr);
4904 genlmsg_cancel:
4905         genlmsg_cancel(msg, hdr);
4906         return -EMSGSIZE;
4907 }
4908
4909 static void devlink_recover_notify(struct devlink_health_reporter *reporter,
4910                                    enum devlink_command cmd)
4911 {
4912         struct sk_buff *msg;
4913         int err;
4914
4915         WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
4916
4917         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4918         if (!msg)
4919                 return;
4920
4921         err = devlink_nl_health_reporter_fill(msg, reporter->devlink,
4922                                               reporter, cmd, 0, 0, 0);
4923         if (err) {
4924                 nlmsg_free(msg);
4925                 return;
4926         }
4927
4928         genlmsg_multicast_netns(&devlink_nl_family,
4929                                 devlink_net(reporter->devlink),
4930                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
4931 }
4932
4933 void
4934 devlink_health_reporter_recovery_done(struct devlink_health_reporter *reporter)
4935 {
4936         reporter->recovery_count++;
4937         reporter->last_recovery_ts = jiffies;
4938 }
4939 EXPORT_SYMBOL_GPL(devlink_health_reporter_recovery_done);
4940
4941 static int
4942 devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
4943                                 void *priv_ctx, struct netlink_ext_ack *extack)
4944 {
4945         int err;
4946
4947         if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
4948                 return 0;
4949
4950         if (!reporter->ops->recover)
4951                 return -EOPNOTSUPP;
4952
4953         err = reporter->ops->recover(reporter, priv_ctx, extack);
4954         if (err)
4955                 return err;
4956
4957         devlink_health_reporter_recovery_done(reporter);
4958         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
4959         devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
4960
4961         return 0;
4962 }
4963
4964 static void
4965 devlink_health_dump_clear(struct devlink_health_reporter *reporter)
4966 {
4967         if (!reporter->dump_fmsg)
4968                 return;
4969         devlink_fmsg_free(reporter->dump_fmsg);
4970         reporter->dump_fmsg = NULL;
4971 }
4972
4973 static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
4974                                   void *priv_ctx,
4975                                   struct netlink_ext_ack *extack)
4976 {
4977         int err;
4978
4979         if (!reporter->ops->dump)
4980                 return 0;
4981
4982         if (reporter->dump_fmsg)
4983                 return 0;
4984
4985         reporter->dump_fmsg = devlink_fmsg_alloc();
4986         if (!reporter->dump_fmsg) {
4987                 err = -ENOMEM;
4988                 return err;
4989         }
4990
4991         err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
4992         if (err)
4993                 goto dump_err;
4994
4995         err = reporter->ops->dump(reporter, reporter->dump_fmsg,
4996                                   priv_ctx, extack);
4997         if (err)
4998                 goto dump_err;
4999
5000         err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
5001         if (err)
5002                 goto dump_err;
5003
5004         reporter->dump_ts = jiffies;
5005         reporter->dump_real_ts = ktime_get_real_ns();
5006
5007         return 0;
5008
5009 dump_err:
5010         devlink_health_dump_clear(reporter);
5011         return err;
5012 }
5013
5014 int devlink_health_report(struct devlink_health_reporter *reporter,
5015                           const char *msg, void *priv_ctx)
5016 {
5017         enum devlink_health_reporter_state prev_health_state;
5018         struct devlink *devlink = reporter->devlink;
5019
5020         /* write a log message of the current error */
5021         WARN_ON(!msg);
5022         trace_devlink_health_report(devlink, reporter->ops->name, msg);
5023         reporter->error_count++;
5024         prev_health_state = reporter->health_state;
5025         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
5026         devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5027
5028         /* abort if the previous error wasn't recovered */
5029         if (reporter->auto_recover &&
5030             (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
5031              jiffies - reporter->last_recovery_ts <
5032              msecs_to_jiffies(reporter->graceful_period))) {
5033                 trace_devlink_health_recover_aborted(devlink,
5034                                                      reporter->ops->name,
5035                                                      reporter->health_state,
5036                                                      jiffies -
5037                                                      reporter->last_recovery_ts);
5038                 return -ECANCELED;
5039         }
5040
5041         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
5042
5043         mutex_lock(&reporter->dump_lock);
5044         /* store current dump of current error, for later analysis */
5045         devlink_health_do_dump(reporter, priv_ctx, NULL);
5046         mutex_unlock(&reporter->dump_lock);
5047
5048         if (reporter->auto_recover)
5049                 return devlink_health_reporter_recover(reporter,
5050                                                        priv_ctx, NULL);
5051
5052         return 0;
5053 }
5054 EXPORT_SYMBOL_GPL(devlink_health_report);
5055
5056 static struct devlink_health_reporter *
5057 devlink_health_reporter_get_from_attrs(struct devlink *devlink,
5058                                        struct nlattr **attrs)
5059 {
5060         struct devlink_health_reporter *reporter;
5061         char *reporter_name;
5062
5063         if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
5064                 return NULL;
5065
5066         reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
5067         mutex_lock(&devlink->reporters_lock);
5068         reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
5069         if (reporter)
5070                 refcount_inc(&reporter->refcount);
5071         mutex_unlock(&devlink->reporters_lock);
5072         return reporter;
5073 }
5074
5075 static struct devlink_health_reporter *
5076 devlink_health_reporter_get_from_info(struct devlink *devlink,
5077                                       struct genl_info *info)
5078 {
5079         return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
5080 }
5081
5082 static struct devlink_health_reporter *
5083 devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
5084 {
5085         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
5086         struct devlink_health_reporter *reporter;
5087         struct nlattr **attrs = info->attrs;
5088         struct devlink *devlink;
5089
5090         mutex_lock(&devlink_mutex);
5091         devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
5092         if (IS_ERR(devlink))
5093                 goto unlock;
5094
5095         reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
5096         mutex_unlock(&devlink_mutex);
5097         return reporter;
5098 unlock:
5099         mutex_unlock(&devlink_mutex);
5100         return NULL;
5101 }
5102
5103 static void
5104 devlink_health_reporter_put(struct devlink_health_reporter *reporter)
5105 {
5106         refcount_dec(&reporter->refcount);
5107 }
5108
5109 void
5110 devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
5111                                      enum devlink_health_reporter_state state)
5112 {
5113         if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
5114                     state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
5115                 return;
5116
5117         if (reporter->health_state == state)
5118                 return;
5119
5120         reporter->health_state = state;
5121         trace_devlink_health_reporter_state_update(reporter->devlink,
5122                                                    reporter->ops->name, state);
5123         devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5124 }
5125 EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
5126
5127 static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
5128                                                    struct genl_info *info)
5129 {
5130         struct devlink *devlink = info->user_ptr[0];
5131         struct devlink_health_reporter *reporter;
5132         struct sk_buff *msg;
5133         int err;
5134
5135         reporter = devlink_health_reporter_get_from_info(devlink, info);
5136         if (!reporter)
5137                 return -EINVAL;
5138
5139         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5140         if (!msg) {
5141                 err = -ENOMEM;
5142                 goto out;
5143         }
5144
5145         err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
5146                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
5147                                               info->snd_portid, info->snd_seq,
5148                                               0);
5149         if (err) {
5150                 nlmsg_free(msg);
5151                 goto out;
5152         }
5153
5154         err = genlmsg_reply(msg, info);
5155 out:
5156         devlink_health_reporter_put(reporter);
5157         return err;
5158 }
5159
5160 static int
5161 devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
5162                                           struct netlink_callback *cb)
5163 {
5164         struct devlink_health_reporter *reporter;
5165         struct devlink *devlink;
5166         int start = cb->args[0];
5167         int idx = 0;
5168         int err;
5169
5170         mutex_lock(&devlink_mutex);
5171         list_for_each_entry(devlink, &devlink_list, list) {
5172                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5173                         continue;
5174                 mutex_lock(&devlink->reporters_lock);
5175                 list_for_each_entry(reporter, &devlink->reporter_list,
5176                                     list) {
5177                         if (idx < start) {
5178                                 idx++;
5179                                 continue;
5180                         }
5181                         err = devlink_nl_health_reporter_fill(msg, devlink,
5182                                                               reporter,
5183                                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
5184                                                               NETLINK_CB(cb->skb).portid,
5185                                                               cb->nlh->nlmsg_seq,
5186                                                               NLM_F_MULTI);
5187                         if (err) {
5188                                 mutex_unlock(&devlink->reporters_lock);
5189                                 goto out;
5190                         }
5191                         idx++;
5192                 }
5193                 mutex_unlock(&devlink->reporters_lock);
5194         }
5195 out:
5196         mutex_unlock(&devlink_mutex);
5197
5198         cb->args[0] = idx;
5199         return msg->len;
5200 }
5201
5202 static int
5203 devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
5204                                         struct genl_info *info)
5205 {
5206         struct devlink *devlink = info->user_ptr[0];
5207         struct devlink_health_reporter *reporter;
5208         int err;
5209
5210         reporter = devlink_health_reporter_get_from_info(devlink, info);
5211         if (!reporter)
5212                 return -EINVAL;
5213
5214         if (!reporter->ops->recover &&
5215             (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
5216              info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])) {
5217                 err = -EOPNOTSUPP;
5218                 goto out;
5219         }
5220
5221         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
5222                 reporter->graceful_period =
5223                         nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
5224
5225         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
5226                 reporter->auto_recover =
5227                         nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
5228
5229         devlink_health_reporter_put(reporter);
5230         return 0;
5231 out:
5232         devlink_health_reporter_put(reporter);
5233         return err;
5234 }
5235
5236 static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
5237                                                        struct genl_info *info)
5238 {
5239         struct devlink *devlink = info->user_ptr[0];
5240         struct devlink_health_reporter *reporter;
5241         int err;
5242
5243         reporter = devlink_health_reporter_get_from_info(devlink, info);
5244         if (!reporter)
5245                 return -EINVAL;
5246
5247         err = devlink_health_reporter_recover(reporter, NULL, info->extack);
5248
5249         devlink_health_reporter_put(reporter);
5250         return err;
5251 }
5252
5253 static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
5254                                                         struct genl_info *info)
5255 {
5256         struct devlink *devlink = info->user_ptr[0];
5257         struct devlink_health_reporter *reporter;
5258         struct devlink_fmsg *fmsg;
5259         int err;
5260
5261         reporter = devlink_health_reporter_get_from_info(devlink, info);
5262         if (!reporter)
5263                 return -EINVAL;
5264
5265         if (!reporter->ops->diagnose) {
5266                 devlink_health_reporter_put(reporter);
5267                 return -EOPNOTSUPP;
5268         }
5269
5270         fmsg = devlink_fmsg_alloc();
5271         if (!fmsg) {
5272                 devlink_health_reporter_put(reporter);
5273                 return -ENOMEM;
5274         }
5275
5276         err = devlink_fmsg_obj_nest_start(fmsg);
5277         if (err)
5278                 goto out;
5279
5280         err = reporter->ops->diagnose(reporter, fmsg, info->extack);
5281         if (err)
5282                 goto out;
5283
5284         err = devlink_fmsg_obj_nest_end(fmsg);
5285         if (err)
5286                 goto out;
5287
5288         err = devlink_fmsg_snd(fmsg, info,
5289                                DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
5290
5291 out:
5292         devlink_fmsg_free(fmsg);
5293         devlink_health_reporter_put(reporter);
5294         return err;
5295 }
5296
5297 static int
5298 devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
5299                                                struct netlink_callback *cb)
5300 {
5301         struct devlink_health_reporter *reporter;
5302         u64 start = cb->args[0];
5303         int err;
5304
5305         reporter = devlink_health_reporter_get_from_cb(cb);
5306         if (!reporter)
5307                 return -EINVAL;
5308
5309         if (!reporter->ops->dump) {
5310                 err = -EOPNOTSUPP;
5311                 goto out;
5312         }
5313         mutex_lock(&reporter->dump_lock);
5314         if (!start) {
5315                 err = devlink_health_do_dump(reporter, NULL, cb->extack);
5316                 if (err)
5317                         goto unlock;
5318                 cb->args[1] = reporter->dump_ts;
5319         }
5320         if (!reporter->dump_fmsg || cb->args[1] != reporter->dump_ts) {
5321                 NL_SET_ERR_MSG_MOD(cb->extack, "Dump trampled, please retry");
5322                 err = -EAGAIN;
5323                 goto unlock;
5324         }
5325
5326         err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
5327                                   DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
5328 unlock:
5329         mutex_unlock(&reporter->dump_lock);
5330 out:
5331         devlink_health_reporter_put(reporter);
5332         return err;
5333 }
5334
5335 static int
5336 devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
5337                                                struct genl_info *info)
5338 {
5339         struct devlink *devlink = info->user_ptr[0];
5340         struct devlink_health_reporter *reporter;
5341
5342         reporter = devlink_health_reporter_get_from_info(devlink, info);
5343         if (!reporter)
5344                 return -EINVAL;
5345
5346         if (!reporter->ops->dump) {
5347                 devlink_health_reporter_put(reporter);
5348                 return -EOPNOTSUPP;
5349         }
5350
5351         mutex_lock(&reporter->dump_lock);
5352         devlink_health_dump_clear(reporter);
5353         mutex_unlock(&reporter->dump_lock);
5354         devlink_health_reporter_put(reporter);
5355         return 0;
5356 }
5357
5358 struct devlink_stats {
5359         u64 rx_bytes;
5360         u64 rx_packets;
5361         struct u64_stats_sync syncp;
5362 };
5363
5364 /**
5365  * struct devlink_trap_group_item - Packet trap group attributes.
5366  * @group: Immutable packet trap group attributes.
5367  * @refcount: Number of trap items using the group.
5368  * @list: trap_group_list member.
5369  * @stats: Trap group statistics.
5370  *
5371  * Describes packet trap group attributes. Created by devlink during trap
5372  * registration.
5373  */
5374 struct devlink_trap_group_item {
5375         const struct devlink_trap_group *group;
5376         refcount_t refcount;
5377         struct list_head list;
5378         struct devlink_stats __percpu *stats;
5379 };
5380
5381 /**
5382  * struct devlink_trap_item - Packet trap attributes.
5383  * @trap: Immutable packet trap attributes.
5384  * @group_item: Associated group item.
5385  * @list: trap_list member.
5386  * @action: Trap action.
5387  * @stats: Trap statistics.
5388  * @priv: Driver private information.
5389  *
5390  * Describes both mutable and immutable packet trap attributes. Created by
5391  * devlink during trap registration and used for all trap related operations.
5392  */
5393 struct devlink_trap_item {
5394         const struct devlink_trap *trap;
5395         struct devlink_trap_group_item *group_item;
5396         struct list_head list;
5397         enum devlink_trap_action action;
5398         struct devlink_stats __percpu *stats;
5399         void *priv;
5400 };
5401
5402 static struct devlink_trap_item *
5403 devlink_trap_item_lookup(struct devlink *devlink, const char *name)
5404 {
5405         struct devlink_trap_item *trap_item;
5406
5407         list_for_each_entry(trap_item, &devlink->trap_list, list) {
5408                 if (!strcmp(trap_item->trap->name, name))
5409                         return trap_item;
5410         }
5411
5412         return NULL;
5413 }
5414
5415 static struct devlink_trap_item *
5416 devlink_trap_item_get_from_info(struct devlink *devlink,
5417                                 struct genl_info *info)
5418 {
5419         struct nlattr *attr;
5420
5421         if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
5422                 return NULL;
5423         attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
5424
5425         return devlink_trap_item_lookup(devlink, nla_data(attr));
5426 }
5427
5428 static int
5429 devlink_trap_action_get_from_info(struct genl_info *info,
5430                                   enum devlink_trap_action *p_trap_action)
5431 {
5432         u8 val;
5433
5434         val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
5435         switch (val) {
5436         case DEVLINK_TRAP_ACTION_DROP: /* fall-through */
5437         case DEVLINK_TRAP_ACTION_TRAP:
5438                 *p_trap_action = val;
5439                 break;
5440         default:
5441                 return -EINVAL;
5442         }
5443
5444         return 0;
5445 }
5446
5447 static int devlink_trap_metadata_put(struct sk_buff *msg,
5448                                      const struct devlink_trap *trap)
5449 {
5450         struct nlattr *attr;
5451
5452         attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
5453         if (!attr)
5454                 return -EMSGSIZE;
5455
5456         if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
5457             nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
5458                 goto nla_put_failure;
5459
5460         nla_nest_end(msg, attr);
5461
5462         return 0;
5463
5464 nla_put_failure:
5465         nla_nest_cancel(msg, attr);
5466         return -EMSGSIZE;
5467 }
5468
5469 static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
5470                                     struct devlink_stats *stats)
5471 {
5472         int i;
5473
5474         memset(stats, 0, sizeof(*stats));
5475         for_each_possible_cpu(i) {
5476                 struct devlink_stats *cpu_stats;
5477                 u64 rx_packets, rx_bytes;
5478                 unsigned int start;
5479
5480                 cpu_stats = per_cpu_ptr(trap_stats, i);
5481                 do {
5482                         start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
5483                         rx_packets = cpu_stats->rx_packets;
5484                         rx_bytes = cpu_stats->rx_bytes;
5485                 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
5486
5487                 stats->rx_packets += rx_packets;
5488                 stats->rx_bytes += rx_bytes;
5489         }
5490 }
5491
5492 static int devlink_trap_stats_put(struct sk_buff *msg,
5493                                   struct devlink_stats __percpu *trap_stats)
5494 {
5495         struct devlink_stats stats;
5496         struct nlattr *attr;
5497
5498         devlink_trap_stats_read(trap_stats, &stats);
5499
5500         attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
5501         if (!attr)
5502                 return -EMSGSIZE;
5503
5504         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
5505                               stats.rx_packets, DEVLINK_ATTR_PAD))
5506                 goto nla_put_failure;
5507
5508         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
5509                               stats.rx_bytes, DEVLINK_ATTR_PAD))
5510                 goto nla_put_failure;
5511
5512         nla_nest_end(msg, attr);
5513
5514         return 0;
5515
5516 nla_put_failure:
5517         nla_nest_cancel(msg, attr);
5518         return -EMSGSIZE;
5519 }
5520
5521 static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
5522                                 const struct devlink_trap_item *trap_item,
5523                                 enum devlink_command cmd, u32 portid, u32 seq,
5524                                 int flags)
5525 {
5526         struct devlink_trap_group_item *group_item = trap_item->group_item;
5527         void *hdr;
5528         int err;
5529
5530         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5531         if (!hdr)
5532                 return -EMSGSIZE;
5533
5534         if (devlink_nl_put_handle(msg, devlink))
5535                 goto nla_put_failure;
5536
5537         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5538                            group_item->group->name))
5539                 goto nla_put_failure;
5540
5541         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
5542                 goto nla_put_failure;
5543
5544         if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
5545                 goto nla_put_failure;
5546
5547         if (trap_item->trap->generic &&
5548             nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5549                 goto nla_put_failure;
5550
5551         if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
5552                 goto nla_put_failure;
5553
5554         err = devlink_trap_metadata_put(msg, trap_item->trap);
5555         if (err)
5556                 goto nla_put_failure;
5557
5558         err = devlink_trap_stats_put(msg, trap_item->stats);
5559         if (err)
5560                 goto nla_put_failure;
5561
5562         genlmsg_end(msg, hdr);
5563
5564         return 0;
5565
5566 nla_put_failure:
5567         genlmsg_cancel(msg, hdr);
5568         return -EMSGSIZE;
5569 }
5570
5571 static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb,
5572                                         struct genl_info *info)
5573 {
5574         struct netlink_ext_ack *extack = info->extack;
5575         struct devlink *devlink = info->user_ptr[0];
5576         struct devlink_trap_item *trap_item;
5577         struct sk_buff *msg;
5578         int err;
5579
5580         if (list_empty(&devlink->trap_list))
5581                 return -EOPNOTSUPP;
5582
5583         trap_item = devlink_trap_item_get_from_info(devlink, info);
5584         if (!trap_item) {
5585                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
5586                 return -ENOENT;
5587         }
5588
5589         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5590         if (!msg)
5591                 return -ENOMEM;
5592
5593         err = devlink_nl_trap_fill(msg, devlink, trap_item,
5594                                    DEVLINK_CMD_TRAP_NEW, info->snd_portid,
5595                                    info->snd_seq, 0);
5596         if (err)
5597                 goto err_trap_fill;
5598
5599         return genlmsg_reply(msg, info);
5600
5601 err_trap_fill:
5602         nlmsg_free(msg);
5603         return err;
5604 }
5605
5606 static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
5607                                           struct netlink_callback *cb)
5608 {
5609         struct devlink_trap_item *trap_item;
5610         struct devlink *devlink;
5611         int start = cb->args[0];
5612         int idx = 0;
5613         int err;
5614
5615         mutex_lock(&devlink_mutex);
5616         list_for_each_entry(devlink, &devlink_list, list) {
5617                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5618                         continue;
5619                 mutex_lock(&devlink->lock);
5620                 list_for_each_entry(trap_item, &devlink->trap_list, list) {
5621                         if (idx < start) {
5622                                 idx++;
5623                                 continue;
5624                         }
5625                         err = devlink_nl_trap_fill(msg, devlink, trap_item,
5626                                                    DEVLINK_CMD_TRAP_NEW,
5627                                                    NETLINK_CB(cb->skb).portid,
5628                                                    cb->nlh->nlmsg_seq,
5629                                                    NLM_F_MULTI);
5630                         if (err) {
5631                                 mutex_unlock(&devlink->lock);
5632                                 goto out;
5633                         }
5634                         idx++;
5635                 }
5636                 mutex_unlock(&devlink->lock);
5637         }
5638 out:
5639         mutex_unlock(&devlink_mutex);
5640
5641         cb->args[0] = idx;
5642         return msg->len;
5643 }
5644
5645 static int __devlink_trap_action_set(struct devlink *devlink,
5646                                      struct devlink_trap_item *trap_item,
5647                                      enum devlink_trap_action trap_action,
5648                                      struct netlink_ext_ack *extack)
5649 {
5650         int err;
5651
5652         if (trap_item->action != trap_action &&
5653             trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
5654                 NL_SET_ERR_MSG_MOD(extack, "Cannot change action of non-drop traps. Skipping");
5655                 return 0;
5656         }
5657
5658         err = devlink->ops->trap_action_set(devlink, trap_item->trap,
5659                                             trap_action);
5660         if (err)
5661                 return err;
5662
5663         trap_item->action = trap_action;
5664
5665         return 0;
5666 }
5667
5668 static int devlink_trap_action_set(struct devlink *devlink,
5669                                    struct devlink_trap_item *trap_item,
5670                                    struct genl_info *info)
5671 {
5672         enum devlink_trap_action trap_action;
5673         int err;
5674
5675         if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
5676                 return 0;
5677
5678         err = devlink_trap_action_get_from_info(info, &trap_action);
5679         if (err) {
5680                 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
5681                 return -EINVAL;
5682         }
5683
5684         return __devlink_trap_action_set(devlink, trap_item, trap_action,
5685                                          info->extack);
5686 }
5687
5688 static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb,
5689                                         struct genl_info *info)
5690 {
5691         struct netlink_ext_ack *extack = info->extack;
5692         struct devlink *devlink = info->user_ptr[0];
5693         struct devlink_trap_item *trap_item;
5694         int err;
5695
5696         if (list_empty(&devlink->trap_list))
5697                 return -EOPNOTSUPP;
5698
5699         trap_item = devlink_trap_item_get_from_info(devlink, info);
5700         if (!trap_item) {
5701                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
5702                 return -ENOENT;
5703         }
5704
5705         err = devlink_trap_action_set(devlink, trap_item, info);
5706         if (err)
5707                 return err;
5708
5709         return 0;
5710 }
5711
5712 static struct devlink_trap_group_item *
5713 devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
5714 {
5715         struct devlink_trap_group_item *group_item;
5716
5717         list_for_each_entry(group_item, &devlink->trap_group_list, list) {
5718                 if (!strcmp(group_item->group->name, name))
5719                         return group_item;
5720         }
5721
5722         return NULL;
5723 }
5724
5725 static struct devlink_trap_group_item *
5726 devlink_trap_group_item_get_from_info(struct devlink *devlink,
5727                                       struct genl_info *info)
5728 {
5729         char *name;
5730
5731         if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
5732                 return NULL;
5733         name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
5734
5735         return devlink_trap_group_item_lookup(devlink, name);
5736 }
5737
5738 static int
5739 devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
5740                            const struct devlink_trap_group_item *group_item,
5741                            enum devlink_command cmd, u32 portid, u32 seq,
5742                            int flags)
5743 {
5744         void *hdr;
5745         int err;
5746
5747         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5748         if (!hdr)
5749                 return -EMSGSIZE;
5750
5751         if (devlink_nl_put_handle(msg, devlink))
5752                 goto nla_put_failure;
5753
5754         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5755                            group_item->group->name))
5756                 goto nla_put_failure;
5757
5758         if (group_item->group->generic &&
5759             nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5760                 goto nla_put_failure;
5761
5762         err = devlink_trap_stats_put(msg, group_item->stats);
5763         if (err)
5764                 goto nla_put_failure;
5765
5766         genlmsg_end(msg, hdr);
5767
5768         return 0;
5769
5770 nla_put_failure:
5771         genlmsg_cancel(msg, hdr);
5772         return -EMSGSIZE;
5773 }
5774
5775 static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb,
5776                                               struct genl_info *info)
5777 {
5778         struct netlink_ext_ack *extack = info->extack;
5779         struct devlink *devlink = info->user_ptr[0];
5780         struct devlink_trap_group_item *group_item;
5781         struct sk_buff *msg;
5782         int err;
5783
5784         if (list_empty(&devlink->trap_group_list))
5785                 return -EOPNOTSUPP;
5786
5787         group_item = devlink_trap_group_item_get_from_info(devlink, info);
5788         if (!group_item) {
5789                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
5790                 return -ENOENT;
5791         }
5792
5793         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5794         if (!msg)
5795                 return -ENOMEM;
5796
5797         err = devlink_nl_trap_group_fill(msg, devlink, group_item,
5798                                          DEVLINK_CMD_TRAP_GROUP_NEW,
5799                                          info->snd_portid, info->snd_seq, 0);
5800         if (err)
5801                 goto err_trap_group_fill;
5802
5803         return genlmsg_reply(msg, info);
5804
5805 err_trap_group_fill:
5806         nlmsg_free(msg);
5807         return err;
5808 }
5809
5810 static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
5811                                                 struct netlink_callback *cb)
5812 {
5813         enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW;
5814         struct devlink_trap_group_item *group_item;
5815         u32 portid = NETLINK_CB(cb->skb).portid;
5816         struct devlink *devlink;
5817         int start = cb->args[0];
5818         int idx = 0;
5819         int err;
5820
5821         mutex_lock(&devlink_mutex);
5822         list_for_each_entry(devlink, &devlink_list, list) {
5823                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5824                         continue;
5825                 mutex_lock(&devlink->lock);
5826                 list_for_each_entry(group_item, &devlink->trap_group_list,
5827                                     list) {
5828                         if (idx < start) {
5829                                 idx++;
5830                                 continue;
5831                         }
5832                         err = devlink_nl_trap_group_fill(msg, devlink,
5833                                                          group_item, cmd,
5834                                                          portid,
5835                                                          cb->nlh->nlmsg_seq,
5836                                                          NLM_F_MULTI);
5837                         if (err) {
5838                                 mutex_unlock(&devlink->lock);
5839                                 goto out;
5840                         }
5841                         idx++;
5842                 }
5843                 mutex_unlock(&devlink->lock);
5844         }
5845 out:
5846         mutex_unlock(&devlink_mutex);
5847
5848         cb->args[0] = idx;
5849         return msg->len;
5850 }
5851
5852 static int
5853 __devlink_trap_group_action_set(struct devlink *devlink,
5854                                 struct devlink_trap_group_item *group_item,
5855                                 enum devlink_trap_action trap_action,
5856                                 struct netlink_ext_ack *extack)
5857 {
5858         const char *group_name = group_item->group->name;
5859         struct devlink_trap_item *trap_item;
5860         int err;
5861
5862         list_for_each_entry(trap_item, &devlink->trap_list, list) {
5863                 if (strcmp(trap_item->trap->group.name, group_name))
5864                         continue;
5865                 err = __devlink_trap_action_set(devlink, trap_item,
5866                                                 trap_action, extack);
5867                 if (err)
5868                         return err;
5869         }
5870
5871         return 0;
5872 }
5873
5874 static int
5875 devlink_trap_group_action_set(struct devlink *devlink,
5876                               struct devlink_trap_group_item *group_item,
5877                               struct genl_info *info)
5878 {
5879         enum devlink_trap_action trap_action;
5880         int err;
5881
5882         if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
5883                 return 0;
5884
5885         err = devlink_trap_action_get_from_info(info, &trap_action);
5886         if (err) {
5887                 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
5888                 return -EINVAL;
5889         }
5890
5891         err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
5892                                               info->extack);
5893         if (err)
5894                 return err;
5895
5896         return 0;
5897 }
5898
5899 static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
5900                                               struct genl_info *info)
5901 {
5902         struct netlink_ext_ack *extack = info->extack;
5903         struct devlink *devlink = info->user_ptr[0];
5904         struct devlink_trap_group_item *group_item;
5905         int err;
5906
5907         if (list_empty(&devlink->trap_group_list))
5908                 return -EOPNOTSUPP;
5909
5910         group_item = devlink_trap_group_item_get_from_info(devlink, info);
5911         if (!group_item) {
5912                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
5913                 return -ENOENT;
5914         }
5915
5916         err = devlink_trap_group_action_set(devlink, group_item, info);
5917         if (err)
5918                 return err;
5919
5920         return 0;
5921 }
5922
5923 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
5924         [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
5925         [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
5926         [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
5927         [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
5928         [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
5929         [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
5930         [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
5931         [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
5932         [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
5933         [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
5934         [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
5935         [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
5936         [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
5937         [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
5938         [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
5939         [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
5940         [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
5941         [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
5942         [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
5943         [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
5944         [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
5945         [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
5946         [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
5947         [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
5948         [DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },
5949         [DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },
5950         [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
5951         [DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
5952         [DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
5953         [DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING },
5954         [DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 },
5955         [DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING },
5956         [DEVLINK_ATTR_NETNS_PID] = { .type = NLA_U32 },
5957         [DEVLINK_ATTR_NETNS_FD] = { .type = NLA_U32 },
5958         [DEVLINK_ATTR_NETNS_ID] = { .type = NLA_U32 },
5959 };
5960
5961 static const struct genl_ops devlink_nl_ops[] = {
5962         {
5963                 .cmd = DEVLINK_CMD_GET,
5964                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5965                 .doit = devlink_nl_cmd_get_doit,
5966                 .dumpit = devlink_nl_cmd_get_dumpit,
5967                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5968                 /* can be retrieved by unprivileged users */
5969         },
5970         {
5971                 .cmd = DEVLINK_CMD_PORT_GET,
5972                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5973                 .doit = devlink_nl_cmd_port_get_doit,
5974                 .dumpit = devlink_nl_cmd_port_get_dumpit,
5975                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5976                 /* can be retrieved by unprivileged users */
5977         },
5978         {
5979                 .cmd = DEVLINK_CMD_PORT_SET,
5980                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5981                 .doit = devlink_nl_cmd_port_set_doit,
5982                 .flags = GENL_ADMIN_PERM,
5983                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5984         },
5985         {
5986                 .cmd = DEVLINK_CMD_PORT_SPLIT,
5987                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5988                 .doit = devlink_nl_cmd_port_split_doit,
5989                 .flags = GENL_ADMIN_PERM,
5990                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5991                                   DEVLINK_NL_FLAG_NO_LOCK,
5992         },
5993         {
5994                 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
5995                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5996                 .doit = devlink_nl_cmd_port_unsplit_doit,
5997                 .flags = GENL_ADMIN_PERM,
5998                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5999                                   DEVLINK_NL_FLAG_NO_LOCK,
6000         },
6001         {
6002                 .cmd = DEVLINK_CMD_SB_GET,
6003                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6004                 .doit = devlink_nl_cmd_sb_get_doit,
6005                 .dumpit = devlink_nl_cmd_sb_get_dumpit,
6006                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6007                                   DEVLINK_NL_FLAG_NEED_SB,
6008                 /* can be retrieved by unprivileged users */
6009         },
6010         {
6011                 .cmd = DEVLINK_CMD_SB_POOL_GET,
6012                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6013                 .doit = devlink_nl_cmd_sb_pool_get_doit,
6014                 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
6015                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6016                                   DEVLINK_NL_FLAG_NEED_SB,
6017                 /* can be retrieved by unprivileged users */
6018         },
6019         {
6020                 .cmd = DEVLINK_CMD_SB_POOL_SET,
6021                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6022                 .doit = devlink_nl_cmd_sb_pool_set_doit,
6023                 .flags = GENL_ADMIN_PERM,
6024                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6025                                   DEVLINK_NL_FLAG_NEED_SB,
6026         },
6027         {
6028                 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
6029                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6030                 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
6031                 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
6032                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6033                                   DEVLINK_NL_FLAG_NEED_SB,
6034                 /* can be retrieved by unprivileged users */
6035         },
6036         {
6037                 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
6038                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6039                 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
6040                 .flags = GENL_ADMIN_PERM,
6041                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6042                                   DEVLINK_NL_FLAG_NEED_SB,
6043         },
6044         {
6045                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
6046                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6047                 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
6048                 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
6049                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6050                                   DEVLINK_NL_FLAG_NEED_SB,
6051                 /* can be retrieved by unprivileged users */
6052         },
6053         {
6054                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
6055                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6056                 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
6057                 .flags = GENL_ADMIN_PERM,
6058                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6059                                   DEVLINK_NL_FLAG_NEED_SB,
6060         },
6061         {
6062                 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
6063                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6064                 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
6065                 .flags = GENL_ADMIN_PERM,
6066                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6067                                   DEVLINK_NL_FLAG_NEED_SB,
6068         },
6069         {
6070                 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
6071                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6072                 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
6073                 .flags = GENL_ADMIN_PERM,
6074                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6075                                   DEVLINK_NL_FLAG_NEED_SB,
6076         },
6077         {
6078                 .cmd = DEVLINK_CMD_ESWITCH_GET,
6079                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6080                 .doit = devlink_nl_cmd_eswitch_get_doit,
6081                 .flags = GENL_ADMIN_PERM,
6082                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6083         },
6084         {
6085                 .cmd = DEVLINK_CMD_ESWITCH_SET,
6086                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6087                 .doit = devlink_nl_cmd_eswitch_set_doit,
6088                 .flags = GENL_ADMIN_PERM,
6089                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6090                                   DEVLINK_NL_FLAG_NO_LOCK,
6091         },
6092         {
6093                 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
6094                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6095                 .doit = devlink_nl_cmd_dpipe_table_get,
6096                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6097                 /* can be retrieved by unprivileged users */
6098         },
6099         {
6100                 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
6101                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6102                 .doit = devlink_nl_cmd_dpipe_entries_get,
6103                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6104                 /* can be retrieved by unprivileged users */
6105         },
6106         {
6107                 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
6108                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6109                 .doit = devlink_nl_cmd_dpipe_headers_get,
6110                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6111                 /* can be retrieved by unprivileged users */
6112         },
6113         {
6114                 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
6115                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6116                 .doit = devlink_nl_cmd_dpipe_table_counters_set,
6117                 .flags = GENL_ADMIN_PERM,
6118                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6119         },
6120         {
6121                 .cmd = DEVLINK_CMD_RESOURCE_SET,
6122                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6123                 .doit = devlink_nl_cmd_resource_set,
6124                 .flags = GENL_ADMIN_PERM,
6125                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6126         },
6127         {
6128                 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
6129                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6130                 .doit = devlink_nl_cmd_resource_dump,
6131                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6132                 /* can be retrieved by unprivileged users */
6133         },
6134         {
6135                 .cmd = DEVLINK_CMD_RELOAD,
6136                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6137                 .doit = devlink_nl_cmd_reload,
6138                 .flags = GENL_ADMIN_PERM,
6139                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6140                                   DEVLINK_NL_FLAG_NO_LOCK,
6141         },
6142         {
6143                 .cmd = DEVLINK_CMD_PARAM_GET,
6144                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6145                 .doit = devlink_nl_cmd_param_get_doit,
6146                 .dumpit = devlink_nl_cmd_param_get_dumpit,
6147                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6148                 /* can be retrieved by unprivileged users */
6149         },
6150         {
6151                 .cmd = DEVLINK_CMD_PARAM_SET,
6152                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6153                 .doit = devlink_nl_cmd_param_set_doit,
6154                 .flags = GENL_ADMIN_PERM,
6155                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6156         },
6157         {
6158                 .cmd = DEVLINK_CMD_PORT_PARAM_GET,
6159                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6160                 .doit = devlink_nl_cmd_port_param_get_doit,
6161                 .dumpit = devlink_nl_cmd_port_param_get_dumpit,
6162                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6163                 /* can be retrieved by unprivileged users */
6164         },
6165         {
6166                 .cmd = DEVLINK_CMD_PORT_PARAM_SET,
6167                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6168                 .doit = devlink_nl_cmd_port_param_set_doit,
6169                 .flags = GENL_ADMIN_PERM,
6170                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6171         },
6172         {
6173                 .cmd = DEVLINK_CMD_REGION_GET,
6174                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6175                 .doit = devlink_nl_cmd_region_get_doit,
6176                 .dumpit = devlink_nl_cmd_region_get_dumpit,
6177                 .flags = GENL_ADMIN_PERM,
6178                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6179         },
6180         {
6181                 .cmd = DEVLINK_CMD_REGION_DEL,
6182                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6183                 .doit = devlink_nl_cmd_region_del,
6184                 .flags = GENL_ADMIN_PERM,
6185                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6186         },
6187         {
6188                 .cmd = DEVLINK_CMD_REGION_READ,
6189                 .validate = GENL_DONT_VALIDATE_STRICT |
6190                             GENL_DONT_VALIDATE_DUMP_STRICT,
6191                 .dumpit = devlink_nl_cmd_region_read_dumpit,
6192                 .flags = GENL_ADMIN_PERM,
6193                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6194         },
6195         {
6196                 .cmd = DEVLINK_CMD_INFO_GET,
6197                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6198                 .doit = devlink_nl_cmd_info_get_doit,
6199                 .dumpit = devlink_nl_cmd_info_get_dumpit,
6200                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6201                 /* can be retrieved by unprivileged users */
6202         },
6203         {
6204                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
6205                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6206                 .doit = devlink_nl_cmd_health_reporter_get_doit,
6207                 .dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
6208                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6209                                   DEVLINK_NL_FLAG_NO_LOCK,
6210                 /* can be retrieved by unprivileged users */
6211         },
6212         {
6213                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
6214                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6215                 .doit = devlink_nl_cmd_health_reporter_set_doit,
6216                 .flags = GENL_ADMIN_PERM,
6217                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6218                                   DEVLINK_NL_FLAG_NO_LOCK,
6219         },
6220         {
6221                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
6222                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6223                 .doit = devlink_nl_cmd_health_reporter_recover_doit,
6224                 .flags = GENL_ADMIN_PERM,
6225                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6226                                   DEVLINK_NL_FLAG_NO_LOCK,
6227         },
6228         {
6229                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
6230                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6231                 .doit = devlink_nl_cmd_health_reporter_diagnose_doit,
6232                 .flags = GENL_ADMIN_PERM,
6233                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6234                                   DEVLINK_NL_FLAG_NO_LOCK,
6235         },
6236         {
6237                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
6238                 .validate = GENL_DONT_VALIDATE_STRICT |
6239                             GENL_DONT_VALIDATE_DUMP_STRICT,
6240                 .dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
6241                 .flags = GENL_ADMIN_PERM,
6242                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6243                                   DEVLINK_NL_FLAG_NO_LOCK,
6244         },
6245         {
6246                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
6247                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6248                 .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
6249                 .flags = GENL_ADMIN_PERM,
6250                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6251                                   DEVLINK_NL_FLAG_NO_LOCK,
6252         },
6253         {
6254                 .cmd = DEVLINK_CMD_FLASH_UPDATE,
6255                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6256                 .doit = devlink_nl_cmd_flash_update,
6257                 .flags = GENL_ADMIN_PERM,
6258                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6259         },
6260         {
6261                 .cmd = DEVLINK_CMD_TRAP_GET,
6262                 .doit = devlink_nl_cmd_trap_get_doit,
6263                 .dumpit = devlink_nl_cmd_trap_get_dumpit,
6264                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6265                 /* can be retrieved by unprivileged users */
6266         },
6267         {
6268                 .cmd = DEVLINK_CMD_TRAP_SET,
6269                 .doit = devlink_nl_cmd_trap_set_doit,
6270                 .flags = GENL_ADMIN_PERM,
6271                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6272         },
6273         {
6274                 .cmd = DEVLINK_CMD_TRAP_GROUP_GET,
6275                 .doit = devlink_nl_cmd_trap_group_get_doit,
6276                 .dumpit = devlink_nl_cmd_trap_group_get_dumpit,
6277                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6278                 /* can be retrieved by unprivileged users */
6279         },
6280         {
6281                 .cmd = DEVLINK_CMD_TRAP_GROUP_SET,
6282                 .doit = devlink_nl_cmd_trap_group_set_doit,
6283                 .flags = GENL_ADMIN_PERM,
6284                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6285         },
6286 };
6287
6288 static struct genl_family devlink_nl_family __ro_after_init = {
6289         .name           = DEVLINK_GENL_NAME,
6290         .version        = DEVLINK_GENL_VERSION,
6291         .maxattr        = DEVLINK_ATTR_MAX,
6292         .policy = devlink_nl_policy,
6293         .netnsok        = true,
6294         .pre_doit       = devlink_nl_pre_doit,
6295         .post_doit      = devlink_nl_post_doit,
6296         .module         = THIS_MODULE,
6297         .ops            = devlink_nl_ops,
6298         .n_ops          = ARRAY_SIZE(devlink_nl_ops),
6299         .mcgrps         = devlink_nl_mcgrps,
6300         .n_mcgrps       = ARRAY_SIZE(devlink_nl_mcgrps),
6301 };
6302
6303 /**
6304  *      devlink_alloc - Allocate new devlink instance resources
6305  *
6306  *      @ops: ops
6307  *      @priv_size: size of user private data
6308  *
6309  *      Allocate new devlink instance resources, including devlink index
6310  *      and name.
6311  */
6312 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
6313 {
6314         struct devlink *devlink;
6315
6316         if (WARN_ON(!ops))
6317                 return NULL;
6318
6319         devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
6320         if (!devlink)
6321                 return NULL;
6322         devlink->ops = ops;
6323         __devlink_net_set(devlink, &init_net);
6324         INIT_LIST_HEAD(&devlink->port_list);
6325         INIT_LIST_HEAD(&devlink->sb_list);
6326         INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
6327         INIT_LIST_HEAD(&devlink->resource_list);
6328         INIT_LIST_HEAD(&devlink->param_list);
6329         INIT_LIST_HEAD(&devlink->region_list);
6330         INIT_LIST_HEAD(&devlink->reporter_list);
6331         INIT_LIST_HEAD(&devlink->trap_list);
6332         INIT_LIST_HEAD(&devlink->trap_group_list);
6333         mutex_init(&devlink->lock);
6334         mutex_init(&devlink->reporters_lock);
6335         return devlink;
6336 }
6337 EXPORT_SYMBOL_GPL(devlink_alloc);
6338
6339 /**
6340  *      devlink_register - Register devlink instance
6341  *
6342  *      @devlink: devlink
6343  *      @dev: parent device
6344  */
6345 int devlink_register(struct devlink *devlink, struct device *dev)
6346 {
6347         mutex_lock(&devlink_mutex);
6348         devlink->dev = dev;
6349         devlink->registered = true;
6350         list_add_tail(&devlink->list, &devlink_list);
6351         devlink_notify(devlink, DEVLINK_CMD_NEW);
6352         mutex_unlock(&devlink_mutex);
6353         return 0;
6354 }
6355 EXPORT_SYMBOL_GPL(devlink_register);
6356
6357 /**
6358  *      devlink_unregister - Unregister devlink instance
6359  *
6360  *      @devlink: devlink
6361  */
6362 void devlink_unregister(struct devlink *devlink)
6363 {
6364         mutex_lock(&devlink_mutex);
6365         WARN_ON(devlink_reload_supported(devlink) &&
6366                 devlink->reload_enabled);
6367         devlink_notify(devlink, DEVLINK_CMD_DEL);
6368         list_del(&devlink->list);
6369         mutex_unlock(&devlink_mutex);
6370 }
6371 EXPORT_SYMBOL_GPL(devlink_unregister);
6372
6373 /**
6374  *      devlink_reload_enable - Enable reload of devlink instance
6375  *
6376  *      @devlink: devlink
6377  *
6378  *      Should be called at end of device initialization
6379  *      process when reload operation is supported.
6380  */
6381 void devlink_reload_enable(struct devlink *devlink)
6382 {
6383         mutex_lock(&devlink_mutex);
6384         devlink->reload_enabled = true;
6385         mutex_unlock(&devlink_mutex);
6386 }
6387 EXPORT_SYMBOL_GPL(devlink_reload_enable);
6388
6389 /**
6390  *      devlink_reload_disable - Disable reload of devlink instance
6391  *
6392  *      @devlink: devlink
6393  *
6394  *      Should be called at the beginning of device cleanup
6395  *      process when reload operation is supported.
6396  */
6397 void devlink_reload_disable(struct devlink *devlink)
6398 {
6399         mutex_lock(&devlink_mutex);
6400         /* Mutex is taken which ensures that no reload operation is in
6401          * progress while setting up forbidded flag.
6402          */
6403         devlink->reload_enabled = false;
6404         mutex_unlock(&devlink_mutex);
6405 }
6406 EXPORT_SYMBOL_GPL(devlink_reload_disable);
6407
6408 /**
6409  *      devlink_free - Free devlink instance resources
6410  *
6411  *      @devlink: devlink
6412  */
6413 void devlink_free(struct devlink *devlink)
6414 {
6415         mutex_destroy(&devlink->reporters_lock);
6416         mutex_destroy(&devlink->lock);
6417         WARN_ON(!list_empty(&devlink->trap_group_list));
6418         WARN_ON(!list_empty(&devlink->trap_list));
6419         WARN_ON(!list_empty(&devlink->reporter_list));
6420         WARN_ON(!list_empty(&devlink->region_list));
6421         WARN_ON(!list_empty(&devlink->param_list));
6422         WARN_ON(!list_empty(&devlink->resource_list));
6423         WARN_ON(!list_empty(&devlink->dpipe_table_list));
6424         WARN_ON(!list_empty(&devlink->sb_list));
6425         WARN_ON(!list_empty(&devlink->port_list));
6426
6427         kfree(devlink);
6428 }
6429 EXPORT_SYMBOL_GPL(devlink_free);
6430
6431 static void devlink_port_type_warn(struct work_struct *work)
6432 {
6433         WARN(true, "Type was not set for devlink port.");
6434 }
6435
6436 static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
6437 {
6438         /* Ignore CPU and DSA flavours. */
6439         return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
6440                devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA;
6441 }
6442
6443 #define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600)
6444
6445 static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
6446 {
6447         if (!devlink_port_type_should_warn(devlink_port))
6448                 return;
6449         /* Schedule a work to WARN in case driver does not set port
6450          * type within timeout.
6451          */
6452         schedule_delayed_work(&devlink_port->type_warn_dw,
6453                               DEVLINK_PORT_TYPE_WARN_TIMEOUT);
6454 }
6455
6456 static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
6457 {
6458         if (!devlink_port_type_should_warn(devlink_port))
6459                 return;
6460         cancel_delayed_work_sync(&devlink_port->type_warn_dw);
6461 }
6462
6463 /**
6464  *      devlink_port_register - Register devlink port
6465  *
6466  *      @devlink: devlink
6467  *      @devlink_port: devlink port
6468  *      @port_index: driver-specific numerical identifier of the port
6469  *
6470  *      Register devlink port with provided port index. User can use
6471  *      any indexing, even hw-related one. devlink_port structure
6472  *      is convenient to be embedded inside user driver private structure.
6473  *      Note that the caller should take care of zeroing the devlink_port
6474  *      structure.
6475  */
6476 int devlink_port_register(struct devlink *devlink,
6477                           struct devlink_port *devlink_port,
6478                           unsigned int port_index)
6479 {
6480         mutex_lock(&devlink->lock);
6481         if (devlink_port_index_exists(devlink, port_index)) {
6482                 mutex_unlock(&devlink->lock);
6483                 return -EEXIST;
6484         }
6485         devlink_port->devlink = devlink;
6486         devlink_port->index = port_index;
6487         devlink_port->registered = true;
6488         spin_lock_init(&devlink_port->type_lock);
6489         list_add_tail(&devlink_port->list, &devlink->port_list);
6490         INIT_LIST_HEAD(&devlink_port->param_list);
6491         mutex_unlock(&devlink->lock);
6492         INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
6493         devlink_port_type_warn_schedule(devlink_port);
6494         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
6495         return 0;
6496 }
6497 EXPORT_SYMBOL_GPL(devlink_port_register);
6498
6499 /**
6500  *      devlink_port_unregister - Unregister devlink port
6501  *
6502  *      @devlink_port: devlink port
6503  */
6504 void devlink_port_unregister(struct devlink_port *devlink_port)
6505 {
6506         struct devlink *devlink = devlink_port->devlink;
6507
6508         devlink_port_type_warn_cancel(devlink_port);
6509         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
6510         mutex_lock(&devlink->lock);
6511         list_del(&devlink_port->list);
6512         mutex_unlock(&devlink->lock);
6513 }
6514 EXPORT_SYMBOL_GPL(devlink_port_unregister);
6515
6516 static void __devlink_port_type_set(struct devlink_port *devlink_port,
6517                                     enum devlink_port_type type,
6518                                     void *type_dev)
6519 {
6520         if (WARN_ON(!devlink_port->registered))
6521                 return;
6522         devlink_port_type_warn_cancel(devlink_port);
6523         spin_lock_bh(&devlink_port->type_lock);
6524         devlink_port->type = type;
6525         devlink_port->type_dev = type_dev;
6526         spin_unlock_bh(&devlink_port->type_lock);
6527         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
6528 }
6529
6530 /**
6531  *      devlink_port_type_eth_set - Set port type to Ethernet
6532  *
6533  *      @devlink_port: devlink port
6534  *      @netdev: related netdevice
6535  */
6536 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
6537                                struct net_device *netdev)
6538 {
6539         const struct net_device_ops *ops = netdev->netdev_ops;
6540
6541         /* If driver registers devlink port, it should set devlink port
6542          * attributes accordingly so the compat functions are called
6543          * and the original ops are not used.
6544          */
6545         if (ops->ndo_get_phys_port_name) {
6546                 /* Some drivers use the same set of ndos for netdevs
6547                  * that have devlink_port registered and also for
6548                  * those who don't. Make sure that ndo_get_phys_port_name
6549                  * returns -EOPNOTSUPP here in case it is defined.
6550                  * Warn if not.
6551                  */
6552                 char name[IFNAMSIZ];
6553                 int err;
6554
6555                 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
6556                 WARN_ON(err != -EOPNOTSUPP);
6557         }
6558         if (ops->ndo_get_port_parent_id) {
6559                 /* Some drivers use the same set of ndos for netdevs
6560                  * that have devlink_port registered and also for
6561                  * those who don't. Make sure that ndo_get_port_parent_id
6562                  * returns -EOPNOTSUPP here in case it is defined.
6563                  * Warn if not.
6564                  */
6565                 struct netdev_phys_item_id ppid;
6566                 int err;
6567
6568                 err = ops->ndo_get_port_parent_id(netdev, &ppid);
6569                 WARN_ON(err != -EOPNOTSUPP);
6570         }
6571         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, netdev);
6572 }
6573 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
6574
6575 /**
6576  *      devlink_port_type_ib_set - Set port type to InfiniBand
6577  *
6578  *      @devlink_port: devlink port
6579  *      @ibdev: related IB device
6580  */
6581 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
6582                               struct ib_device *ibdev)
6583 {
6584         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
6585 }
6586 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
6587
6588 /**
6589  *      devlink_port_type_clear - Clear port type
6590  *
6591  *      @devlink_port: devlink port
6592  */
6593 void devlink_port_type_clear(struct devlink_port *devlink_port)
6594 {
6595         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
6596         devlink_port_type_warn_schedule(devlink_port);
6597 }
6598 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
6599
6600 static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
6601                                     enum devlink_port_flavour flavour,
6602                                     const unsigned char *switch_id,
6603                                     unsigned char switch_id_len)
6604 {
6605         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6606
6607         if (WARN_ON(devlink_port->registered))
6608                 return -EEXIST;
6609         attrs->set = true;
6610         attrs->flavour = flavour;
6611         if (switch_id) {
6612                 attrs->switch_port = true;
6613                 if (WARN_ON(switch_id_len > MAX_PHYS_ITEM_ID_LEN))
6614                         switch_id_len = MAX_PHYS_ITEM_ID_LEN;
6615                 memcpy(attrs->switch_id.id, switch_id, switch_id_len);
6616                 attrs->switch_id.id_len = switch_id_len;
6617         } else {
6618                 attrs->switch_port = false;
6619         }
6620         return 0;
6621 }
6622
6623 /**
6624  *      devlink_port_attrs_set - Set port attributes
6625  *
6626  *      @devlink_port: devlink port
6627  *      @flavour: flavour of the port
6628  *      @port_number: number of the port that is facing user, for example
6629  *                    the front panel port number
6630  *      @split: indicates if this is split port
6631  *      @split_subport_number: if the port is split, this is the number
6632  *                             of subport.
6633  *      @switch_id: if the port is part of switch, this is buffer with ID,
6634  *                  otwerwise this is NULL
6635  *      @switch_id_len: length of the switch_id buffer
6636  */
6637 void devlink_port_attrs_set(struct devlink_port *devlink_port,
6638                             enum devlink_port_flavour flavour,
6639                             u32 port_number, bool split,
6640                             u32 split_subport_number,
6641                             const unsigned char *switch_id,
6642                             unsigned char switch_id_len)
6643 {
6644         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6645         int ret;
6646
6647         ret = __devlink_port_attrs_set(devlink_port, flavour,
6648                                        switch_id, switch_id_len);
6649         if (ret)
6650                 return;
6651         attrs->split = split;
6652         attrs->phys.port_number = port_number;
6653         attrs->phys.split_subport_number = split_subport_number;
6654 }
6655 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
6656
6657 /**
6658  *      devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
6659  *
6660  *      @devlink_port: devlink port
6661  *      @pf: associated PF for the devlink port instance
6662  *      @switch_id: if the port is part of switch, this is buffer with ID,
6663  *                  otherwise this is NULL
6664  *      @switch_id_len: length of the switch_id buffer
6665  */
6666 void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port,
6667                                    const unsigned char *switch_id,
6668                                    unsigned char switch_id_len, u16 pf)
6669 {
6670         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6671         int ret;
6672
6673         ret = __devlink_port_attrs_set(devlink_port,
6674                                        DEVLINK_PORT_FLAVOUR_PCI_PF,
6675                                        switch_id, switch_id_len);
6676         if (ret)
6677                 return;
6678
6679         attrs->pci_pf.pf = pf;
6680 }
6681 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
6682
6683 /**
6684  *      devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
6685  *
6686  *      @devlink_port: devlink port
6687  *      @pf: associated PF for the devlink port instance
6688  *      @vf: associated VF of a PF for the devlink port instance
6689  *      @switch_id: if the port is part of switch, this is buffer with ID,
6690  *                  otherwise this is NULL
6691  *      @switch_id_len: length of the switch_id buffer
6692  */
6693 void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port,
6694                                    const unsigned char *switch_id,
6695                                    unsigned char switch_id_len,
6696                                    u16 pf, u16 vf)
6697 {
6698         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6699         int ret;
6700
6701         ret = __devlink_port_attrs_set(devlink_port,
6702                                        DEVLINK_PORT_FLAVOUR_PCI_VF,
6703                                        switch_id, switch_id_len);
6704         if (ret)
6705                 return;
6706         attrs->pci_vf.pf = pf;
6707         attrs->pci_vf.vf = vf;
6708 }
6709 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
6710
6711 static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
6712                                              char *name, size_t len)
6713 {
6714         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6715         int n = 0;
6716
6717         if (!attrs->set)
6718                 return -EOPNOTSUPP;
6719
6720         switch (attrs->flavour) {
6721         case DEVLINK_PORT_FLAVOUR_PHYSICAL:
6722                 if (!attrs->split)
6723                         n = snprintf(name, len, "p%u", attrs->phys.port_number);
6724                 else
6725                         n = snprintf(name, len, "p%us%u",
6726                                      attrs->phys.port_number,
6727                                      attrs->phys.split_subport_number);
6728                 break;
6729         case DEVLINK_PORT_FLAVOUR_CPU:
6730         case DEVLINK_PORT_FLAVOUR_DSA:
6731                 /* As CPU and DSA ports do not have a netdevice associated
6732                  * case should not ever happen.
6733                  */
6734                 WARN_ON(1);
6735                 return -EINVAL;
6736         case DEVLINK_PORT_FLAVOUR_PCI_PF:
6737                 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
6738                 break;
6739         case DEVLINK_PORT_FLAVOUR_PCI_VF:
6740                 n = snprintf(name, len, "pf%uvf%u",
6741                              attrs->pci_vf.pf, attrs->pci_vf.vf);
6742                 break;
6743         }
6744
6745         if (n >= len)
6746                 return -EINVAL;
6747
6748         return 0;
6749 }
6750
6751 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
6752                         u32 size, u16 ingress_pools_count,
6753                         u16 egress_pools_count, u16 ingress_tc_count,
6754                         u16 egress_tc_count)
6755 {
6756         struct devlink_sb *devlink_sb;
6757         int err = 0;
6758
6759         mutex_lock(&devlink->lock);
6760         if (devlink_sb_index_exists(devlink, sb_index)) {
6761                 err = -EEXIST;
6762                 goto unlock;
6763         }
6764
6765         devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
6766         if (!devlink_sb) {
6767                 err = -ENOMEM;
6768                 goto unlock;
6769         }
6770         devlink_sb->index = sb_index;
6771         devlink_sb->size = size;
6772         devlink_sb->ingress_pools_count = ingress_pools_count;
6773         devlink_sb->egress_pools_count = egress_pools_count;
6774         devlink_sb->ingress_tc_count = ingress_tc_count;
6775         devlink_sb->egress_tc_count = egress_tc_count;
6776         list_add_tail(&devlink_sb->list, &devlink->sb_list);
6777 unlock:
6778         mutex_unlock(&devlink->lock);
6779         return err;
6780 }
6781 EXPORT_SYMBOL_GPL(devlink_sb_register);
6782
6783 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
6784 {
6785         struct devlink_sb *devlink_sb;
6786
6787         mutex_lock(&devlink->lock);
6788         devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
6789         WARN_ON(!devlink_sb);
6790         list_del(&devlink_sb->list);
6791         mutex_unlock(&devlink->lock);
6792         kfree(devlink_sb);
6793 }
6794 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
6795
6796 /**
6797  *      devlink_dpipe_headers_register - register dpipe headers
6798  *
6799  *      @devlink: devlink
6800  *      @dpipe_headers: dpipe header array
6801  *
6802  *      Register the headers supported by hardware.
6803  */
6804 int devlink_dpipe_headers_register(struct devlink *devlink,
6805                                    struct devlink_dpipe_headers *dpipe_headers)
6806 {
6807         mutex_lock(&devlink->lock);
6808         devlink->dpipe_headers = dpipe_headers;
6809         mutex_unlock(&devlink->lock);
6810         return 0;
6811 }
6812 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
6813
6814 /**
6815  *      devlink_dpipe_headers_unregister - unregister dpipe headers
6816  *
6817  *      @devlink: devlink
6818  *
6819  *      Unregister the headers supported by hardware.
6820  */
6821 void devlink_dpipe_headers_unregister(struct devlink *devlink)
6822 {
6823         mutex_lock(&devlink->lock);
6824         devlink->dpipe_headers = NULL;
6825         mutex_unlock(&devlink->lock);
6826 }
6827 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
6828
6829 /**
6830  *      devlink_dpipe_table_counter_enabled - check if counter allocation
6831  *                                            required
6832  *      @devlink: devlink
6833  *      @table_name: tables name
6834  *
6835  *      Used by driver to check if counter allocation is required.
6836  *      After counter allocation is turned on the table entries
6837  *      are updated to include counter statistics.
6838  *
6839  *      After that point on the driver must respect the counter
6840  *      state so that each entry added to the table is added
6841  *      with a counter.
6842  */
6843 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
6844                                          const char *table_name)
6845 {
6846         struct devlink_dpipe_table *table;
6847         bool enabled;
6848
6849         rcu_read_lock();
6850         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
6851                                          table_name);
6852         enabled = false;
6853         if (table)
6854                 enabled = table->counters_enabled;
6855         rcu_read_unlock();
6856         return enabled;
6857 }
6858 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
6859
6860 /**
6861  *      devlink_dpipe_table_register - register dpipe table
6862  *
6863  *      @devlink: devlink
6864  *      @table_name: table name
6865  *      @table_ops: table ops
6866  *      @priv: priv
6867  *      @counter_control_extern: external control for counters
6868  */
6869 int devlink_dpipe_table_register(struct devlink *devlink,
6870                                  const char *table_name,
6871                                  struct devlink_dpipe_table_ops *table_ops,
6872                                  void *priv, bool counter_control_extern)
6873 {
6874         struct devlink_dpipe_table *table;
6875
6876         if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name))
6877                 return -EEXIST;
6878
6879         if (WARN_ON(!table_ops->size_get))
6880                 return -EINVAL;
6881
6882         table = kzalloc(sizeof(*table), GFP_KERNEL);
6883         if (!table)
6884                 return -ENOMEM;
6885
6886         table->name = table_name;
6887         table->table_ops = table_ops;
6888         table->priv = priv;
6889         table->counter_control_extern = counter_control_extern;
6890
6891         mutex_lock(&devlink->lock);
6892         list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
6893         mutex_unlock(&devlink->lock);
6894         return 0;
6895 }
6896 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
6897
6898 /**
6899  *      devlink_dpipe_table_unregister - unregister dpipe table
6900  *
6901  *      @devlink: devlink
6902  *      @table_name: table name
6903  */
6904 void devlink_dpipe_table_unregister(struct devlink *devlink,
6905                                     const char *table_name)
6906 {
6907         struct devlink_dpipe_table *table;
6908
6909         mutex_lock(&devlink->lock);
6910         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
6911                                          table_name);
6912         if (!table)
6913                 goto unlock;
6914         list_del_rcu(&table->list);
6915         mutex_unlock(&devlink->lock);
6916         kfree_rcu(table, rcu);
6917         return;
6918 unlock:
6919         mutex_unlock(&devlink->lock);
6920 }
6921 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
6922
6923 /**
6924  *      devlink_resource_register - devlink resource register
6925  *
6926  *      @devlink: devlink
6927  *      @resource_name: resource's name
6928  *      @resource_size: resource's size
6929  *      @resource_id: resource's id
6930  *      @parent_resource_id: resource's parent id
6931  *      @size_params: size parameters
6932  */
6933 int devlink_resource_register(struct devlink *devlink,
6934                               const char *resource_name,
6935                               u64 resource_size,
6936                               u64 resource_id,
6937                               u64 parent_resource_id,
6938                               const struct devlink_resource_size_params *size_params)
6939 {
6940         struct devlink_resource *resource;
6941         struct list_head *resource_list;
6942         bool top_hierarchy;
6943         int err = 0;
6944
6945         top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
6946
6947         mutex_lock(&devlink->lock);
6948         resource = devlink_resource_find(devlink, NULL, resource_id);
6949         if (resource) {
6950                 err = -EINVAL;
6951                 goto out;
6952         }
6953
6954         resource = kzalloc(sizeof(*resource), GFP_KERNEL);
6955         if (!resource) {
6956                 err = -ENOMEM;
6957                 goto out;
6958         }
6959
6960         if (top_hierarchy) {
6961                 resource_list = &devlink->resource_list;
6962         } else {
6963                 struct devlink_resource *parent_resource;
6964
6965                 parent_resource = devlink_resource_find(devlink, NULL,
6966                                                         parent_resource_id);
6967                 if (parent_resource) {
6968                         resource_list = &parent_resource->resource_list;
6969                         resource->parent = parent_resource;
6970                 } else {
6971                         kfree(resource);
6972                         err = -EINVAL;
6973                         goto out;
6974                 }
6975         }
6976
6977         resource->name = resource_name;
6978         resource->size = resource_size;
6979         resource->size_new = resource_size;
6980         resource->id = resource_id;
6981         resource->size_valid = true;
6982         memcpy(&resource->size_params, size_params,
6983                sizeof(resource->size_params));
6984         INIT_LIST_HEAD(&resource->resource_list);
6985         list_add_tail(&resource->list, resource_list);
6986 out:
6987         mutex_unlock(&devlink->lock);
6988         return err;
6989 }
6990 EXPORT_SYMBOL_GPL(devlink_resource_register);
6991
6992 /**
6993  *      devlink_resources_unregister - free all resources
6994  *
6995  *      @devlink: devlink
6996  *      @resource: resource
6997  */
6998 void devlink_resources_unregister(struct devlink *devlink,
6999                                   struct devlink_resource *resource)
7000 {
7001         struct devlink_resource *tmp, *child_resource;
7002         struct list_head *resource_list;
7003
7004         if (resource)
7005                 resource_list = &resource->resource_list;
7006         else
7007                 resource_list = &devlink->resource_list;
7008
7009         if (!resource)
7010                 mutex_lock(&devlink->lock);
7011
7012         list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
7013                 devlink_resources_unregister(devlink, child_resource);
7014                 list_del(&child_resource->list);
7015                 kfree(child_resource);
7016         }
7017
7018         if (!resource)
7019                 mutex_unlock(&devlink->lock);
7020 }
7021 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
7022
7023 /**
7024  *      devlink_resource_size_get - get and update size
7025  *
7026  *      @devlink: devlink
7027  *      @resource_id: the requested resource id
7028  *      @p_resource_size: ptr to update
7029  */
7030 int devlink_resource_size_get(struct devlink *devlink,
7031                               u64 resource_id,
7032                               u64 *p_resource_size)
7033 {
7034         struct devlink_resource *resource;
7035         int err = 0;
7036
7037         mutex_lock(&devlink->lock);
7038         resource = devlink_resource_find(devlink, NULL, resource_id);
7039         if (!resource) {
7040                 err = -EINVAL;
7041                 goto out;
7042         }
7043         *p_resource_size = resource->size_new;
7044         resource->size = resource->size_new;
7045 out:
7046         mutex_unlock(&devlink->lock);
7047         return err;
7048 }
7049 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
7050
7051 /**
7052  *      devlink_dpipe_table_resource_set - set the resource id
7053  *
7054  *      @devlink: devlink
7055  *      @table_name: table name
7056  *      @resource_id: resource id
7057  *      @resource_units: number of resource's units consumed per table's entry
7058  */
7059 int devlink_dpipe_table_resource_set(struct devlink *devlink,
7060                                      const char *table_name, u64 resource_id,
7061                                      u64 resource_units)
7062 {
7063         struct devlink_dpipe_table *table;
7064         int err = 0;
7065
7066         mutex_lock(&devlink->lock);
7067         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
7068                                          table_name);
7069         if (!table) {
7070                 err = -EINVAL;
7071                 goto out;
7072         }
7073         table->resource_id = resource_id;
7074         table->resource_units = resource_units;
7075         table->resource_valid = true;
7076 out:
7077         mutex_unlock(&devlink->lock);
7078         return err;
7079 }
7080 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
7081
7082 /**
7083  *      devlink_resource_occ_get_register - register occupancy getter
7084  *
7085  *      @devlink: devlink
7086  *      @resource_id: resource id
7087  *      @occ_get: occupancy getter callback
7088  *      @occ_get_priv: occupancy getter callback priv
7089  */
7090 void devlink_resource_occ_get_register(struct devlink *devlink,
7091                                        u64 resource_id,
7092                                        devlink_resource_occ_get_t *occ_get,
7093                                        void *occ_get_priv)
7094 {
7095         struct devlink_resource *resource;
7096
7097         mutex_lock(&devlink->lock);
7098         resource = devlink_resource_find(devlink, NULL, resource_id);
7099         if (WARN_ON(!resource))
7100                 goto out;
7101         WARN_ON(resource->occ_get);
7102
7103         resource->occ_get = occ_get;
7104         resource->occ_get_priv = occ_get_priv;
7105 out:
7106         mutex_unlock(&devlink->lock);
7107 }
7108 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
7109
7110 /**
7111  *      devlink_resource_occ_get_unregister - unregister occupancy getter
7112  *
7113  *      @devlink: devlink
7114  *      @resource_id: resource id
7115  */
7116 void devlink_resource_occ_get_unregister(struct devlink *devlink,
7117                                          u64 resource_id)
7118 {
7119         struct devlink_resource *resource;
7120
7121         mutex_lock(&devlink->lock);
7122         resource = devlink_resource_find(devlink, NULL, resource_id);
7123         if (WARN_ON(!resource))
7124                 goto out;
7125         WARN_ON(!resource->occ_get);
7126
7127         resource->occ_get = NULL;
7128         resource->occ_get_priv = NULL;
7129 out:
7130         mutex_unlock(&devlink->lock);
7131 }
7132 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
7133
7134 static int devlink_param_verify(const struct devlink_param *param)
7135 {
7136         if (!param || !param->name || !param->supported_cmodes)
7137                 return -EINVAL;
7138         if (param->generic)
7139                 return devlink_param_generic_verify(param);
7140         else
7141                 return devlink_param_driver_verify(param);
7142 }
7143
7144 static int __devlink_params_register(struct devlink *devlink,
7145                                      unsigned int port_index,
7146                                      struct list_head *param_list,
7147                                      const struct devlink_param *params,
7148                                      size_t params_count,
7149                                      enum devlink_command reg_cmd,
7150                                      enum devlink_command unreg_cmd)
7151 {
7152         const struct devlink_param *param = params;
7153         int i;
7154         int err;
7155
7156         mutex_lock(&devlink->lock);
7157         for (i = 0; i < params_count; i++, param++) {
7158                 err = devlink_param_verify(param);
7159                 if (err)
7160                         goto rollback;
7161
7162                 err = devlink_param_register_one(devlink, port_index,
7163                                                  param_list, param, reg_cmd);
7164                 if (err)
7165                         goto rollback;
7166         }
7167
7168         mutex_unlock(&devlink->lock);
7169         return 0;
7170
7171 rollback:
7172         if (!i)
7173                 goto unlock;
7174         for (param--; i > 0; i--, param--)
7175                 devlink_param_unregister_one(devlink, port_index, param_list,
7176                                              param, unreg_cmd);
7177 unlock:
7178         mutex_unlock(&devlink->lock);
7179         return err;
7180 }
7181
7182 static void __devlink_params_unregister(struct devlink *devlink,
7183                                         unsigned int port_index,
7184                                         struct list_head *param_list,
7185                                         const struct devlink_param *params,
7186                                         size_t params_count,
7187                                         enum devlink_command cmd)
7188 {
7189         const struct devlink_param *param = params;
7190         int i;
7191
7192         mutex_lock(&devlink->lock);
7193         for (i = 0; i < params_count; i++, param++)
7194                 devlink_param_unregister_one(devlink, 0, param_list, param,
7195                                              cmd);
7196         mutex_unlock(&devlink->lock);
7197 }
7198
7199 /**
7200  *      devlink_params_register - register configuration parameters
7201  *
7202  *      @devlink: devlink
7203  *      @params: configuration parameters array
7204  *      @params_count: number of parameters provided
7205  *
7206  *      Register the configuration parameters supported by the driver.
7207  */
7208 int devlink_params_register(struct devlink *devlink,
7209                             const struct devlink_param *params,
7210                             size_t params_count)
7211 {
7212         return __devlink_params_register(devlink, 0, &devlink->param_list,
7213                                          params, params_count,
7214                                          DEVLINK_CMD_PARAM_NEW,
7215                                          DEVLINK_CMD_PARAM_DEL);
7216 }
7217 EXPORT_SYMBOL_GPL(devlink_params_register);
7218
7219 /**
7220  *      devlink_params_unregister - unregister configuration parameters
7221  *      @devlink: devlink
7222  *      @params: configuration parameters to unregister
7223  *      @params_count: number of parameters provided
7224  */
7225 void devlink_params_unregister(struct devlink *devlink,
7226                                const struct devlink_param *params,
7227                                size_t params_count)
7228 {
7229         return __devlink_params_unregister(devlink, 0, &devlink->param_list,
7230                                            params, params_count,
7231                                            DEVLINK_CMD_PARAM_DEL);
7232 }
7233 EXPORT_SYMBOL_GPL(devlink_params_unregister);
7234
7235 /**
7236  *      devlink_params_publish - publish configuration parameters
7237  *
7238  *      @devlink: devlink
7239  *
7240  *      Publish previously registered configuration parameters.
7241  */
7242 void devlink_params_publish(struct devlink *devlink)
7243 {
7244         struct devlink_param_item *param_item;
7245
7246         list_for_each_entry(param_item, &devlink->param_list, list) {
7247                 if (param_item->published)
7248                         continue;
7249                 param_item->published = true;
7250                 devlink_param_notify(devlink, 0, param_item,
7251                                      DEVLINK_CMD_PARAM_NEW);
7252         }
7253 }
7254 EXPORT_SYMBOL_GPL(devlink_params_publish);
7255
7256 /**
7257  *      devlink_params_unpublish - unpublish configuration parameters
7258  *
7259  *      @devlink: devlink
7260  *
7261  *      Unpublish previously registered configuration parameters.
7262  */
7263 void devlink_params_unpublish(struct devlink *devlink)
7264 {
7265         struct devlink_param_item *param_item;
7266
7267         list_for_each_entry(param_item, &devlink->param_list, list) {
7268                 if (!param_item->published)
7269                         continue;
7270                 param_item->published = false;
7271                 devlink_param_notify(devlink, 0, param_item,
7272                                      DEVLINK_CMD_PARAM_DEL);
7273         }
7274 }
7275 EXPORT_SYMBOL_GPL(devlink_params_unpublish);
7276
7277 /**
7278  *      devlink_port_params_register - register port configuration parameters
7279  *
7280  *      @devlink_port: devlink port
7281  *      @params: configuration parameters array
7282  *      @params_count: number of parameters provided
7283  *
7284  *      Register the configuration parameters supported by the port.
7285  */
7286 int devlink_port_params_register(struct devlink_port *devlink_port,
7287                                  const struct devlink_param *params,
7288                                  size_t params_count)
7289 {
7290         return __devlink_params_register(devlink_port->devlink,
7291                                          devlink_port->index,
7292                                          &devlink_port->param_list, params,
7293                                          params_count,
7294                                          DEVLINK_CMD_PORT_PARAM_NEW,
7295                                          DEVLINK_CMD_PORT_PARAM_DEL);
7296 }
7297 EXPORT_SYMBOL_GPL(devlink_port_params_register);
7298
7299 /**
7300  *      devlink_port_params_unregister - unregister port configuration
7301  *      parameters
7302  *
7303  *      @devlink_port: devlink port
7304  *      @params: configuration parameters array
7305  *      @params_count: number of parameters provided
7306  */
7307 void devlink_port_params_unregister(struct devlink_port *devlink_port,
7308                                     const struct devlink_param *params,
7309                                     size_t params_count)
7310 {
7311         return __devlink_params_unregister(devlink_port->devlink,
7312                                            devlink_port->index,
7313                                            &devlink_port->param_list,
7314                                            params, params_count,
7315                                            DEVLINK_CMD_PORT_PARAM_DEL);
7316 }
7317 EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
7318
7319 static int
7320 __devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
7321                                      union devlink_param_value *init_val)
7322 {
7323         struct devlink_param_item *param_item;
7324
7325         param_item = devlink_param_find_by_id(param_list, param_id);
7326         if (!param_item)
7327                 return -EINVAL;
7328
7329         if (!param_item->driverinit_value_valid ||
7330             !devlink_param_cmode_is_supported(param_item->param,
7331                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
7332                 return -EOPNOTSUPP;
7333
7334         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
7335                 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
7336         else
7337                 *init_val = param_item->driverinit_value;
7338
7339         return 0;
7340 }
7341
7342 static int
7343 __devlink_param_driverinit_value_set(struct devlink *devlink,
7344                                      unsigned int port_index,
7345                                      struct list_head *param_list, u32 param_id,
7346                                      union devlink_param_value init_val,
7347                                      enum devlink_command cmd)
7348 {
7349         struct devlink_param_item *param_item;
7350
7351         param_item = devlink_param_find_by_id(param_list, param_id);
7352         if (!param_item)
7353                 return -EINVAL;
7354
7355         if (!devlink_param_cmode_is_supported(param_item->param,
7356                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
7357                 return -EOPNOTSUPP;
7358
7359         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
7360                 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
7361         else
7362                 param_item->driverinit_value = init_val;
7363         param_item->driverinit_value_valid = true;
7364
7365         devlink_param_notify(devlink, port_index, param_item, cmd);
7366         return 0;
7367 }
7368
7369 /**
7370  *      devlink_param_driverinit_value_get - get configuration parameter
7371  *                                           value for driver initializing
7372  *
7373  *      @devlink: devlink
7374  *      @param_id: parameter ID
7375  *      @init_val: value of parameter in driverinit configuration mode
7376  *
7377  *      This function should be used by the driver to get driverinit
7378  *      configuration for initialization after reload command.
7379  */
7380 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
7381                                        union devlink_param_value *init_val)
7382 {
7383         if (!devlink_reload_supported(devlink))
7384                 return -EOPNOTSUPP;
7385
7386         return __devlink_param_driverinit_value_get(&devlink->param_list,
7387                                                     param_id, init_val);
7388 }
7389 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
7390
7391 /**
7392  *      devlink_param_driverinit_value_set - set value of configuration
7393  *                                           parameter for driverinit
7394  *                                           configuration mode
7395  *
7396  *      @devlink: devlink
7397  *      @param_id: parameter ID
7398  *      @init_val: value of parameter to set for driverinit configuration mode
7399  *
7400  *      This function should be used by the driver to set driverinit
7401  *      configuration mode default value.
7402  */
7403 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
7404                                        union devlink_param_value init_val)
7405 {
7406         return __devlink_param_driverinit_value_set(devlink, 0,
7407                                                     &devlink->param_list,
7408                                                     param_id, init_val,
7409                                                     DEVLINK_CMD_PARAM_NEW);
7410 }
7411 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
7412
7413 /**
7414  *      devlink_port_param_driverinit_value_get - get configuration parameter
7415  *                                              value for driver initializing
7416  *
7417  *      @devlink_port: devlink_port
7418  *      @param_id: parameter ID
7419  *      @init_val: value of parameter in driverinit configuration mode
7420  *
7421  *      This function should be used by the driver to get driverinit
7422  *      configuration for initialization after reload command.
7423  */
7424 int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port,
7425                                             u32 param_id,
7426                                             union devlink_param_value *init_val)
7427 {
7428         struct devlink *devlink = devlink_port->devlink;
7429
7430         if (!devlink_reload_supported(devlink))
7431                 return -EOPNOTSUPP;
7432
7433         return __devlink_param_driverinit_value_get(&devlink_port->param_list,
7434                                                     param_id, init_val);
7435 }
7436 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get);
7437
7438 /**
7439  *     devlink_port_param_driverinit_value_set - set value of configuration
7440  *                                               parameter for driverinit
7441  *                                               configuration mode
7442  *
7443  *     @devlink_port: devlink_port
7444  *     @param_id: parameter ID
7445  *     @init_val: value of parameter to set for driverinit configuration mode
7446  *
7447  *     This function should be used by the driver to set driverinit
7448  *     configuration mode default value.
7449  */
7450 int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
7451                                             u32 param_id,
7452                                             union devlink_param_value init_val)
7453 {
7454         return __devlink_param_driverinit_value_set(devlink_port->devlink,
7455                                                     devlink_port->index,
7456                                                     &devlink_port->param_list,
7457                                                     param_id, init_val,
7458                                                     DEVLINK_CMD_PORT_PARAM_NEW);
7459 }
7460 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
7461
7462 /**
7463  *      devlink_param_value_changed - notify devlink on a parameter's value
7464  *                                    change. Should be called by the driver
7465  *                                    right after the change.
7466  *
7467  *      @devlink: devlink
7468  *      @param_id: parameter ID
7469  *
7470  *      This function should be used by the driver to notify devlink on value
7471  *      change, excluding driverinit configuration mode.
7472  *      For driverinit configuration mode driver should use the function
7473  */
7474 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
7475 {
7476         struct devlink_param_item *param_item;
7477
7478         param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
7479         WARN_ON(!param_item);
7480
7481         devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
7482 }
7483 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
7484
7485 /**
7486  *     devlink_port_param_value_changed - notify devlink on a parameter's value
7487  *                                      change. Should be called by the driver
7488  *                                      right after the change.
7489  *
7490  *     @devlink_port: devlink_port
7491  *     @param_id: parameter ID
7492  *
7493  *     This function should be used by the driver to notify devlink on value
7494  *     change, excluding driverinit configuration mode.
7495  *     For driverinit configuration mode driver should use the function
7496  *     devlink_port_param_driverinit_value_set() instead.
7497  */
7498 void devlink_port_param_value_changed(struct devlink_port *devlink_port,
7499                                       u32 param_id)
7500 {
7501         struct devlink_param_item *param_item;
7502
7503         param_item = devlink_param_find_by_id(&devlink_port->param_list,
7504                                               param_id);
7505         WARN_ON(!param_item);
7506
7507         devlink_param_notify(devlink_port->devlink, devlink_port->index,
7508                              param_item, DEVLINK_CMD_PORT_PARAM_NEW);
7509 }
7510 EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
7511
7512 /**
7513  *      devlink_param_value_str_fill - Safely fill-up the string preventing
7514  *                                     from overflow of the preallocated buffer
7515  *
7516  *      @dst_val: destination devlink_param_value
7517  *      @src: source buffer
7518  */
7519 void devlink_param_value_str_fill(union devlink_param_value *dst_val,
7520                                   const char *src)
7521 {
7522         size_t len;
7523
7524         len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
7525         WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
7526 }
7527 EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
7528
7529 /**
7530  *      devlink_region_create - create a new address region
7531  *
7532  *      @devlink: devlink
7533  *      @region_name: region name
7534  *      @region_max_snapshots: Maximum supported number of snapshots for region
7535  *      @region_size: size of region
7536  */
7537 struct devlink_region *devlink_region_create(struct devlink *devlink,
7538                                              const char *region_name,
7539                                              u32 region_max_snapshots,
7540                                              u64 region_size)
7541 {
7542         struct devlink_region *region;
7543         int err = 0;
7544
7545         mutex_lock(&devlink->lock);
7546
7547         if (devlink_region_get_by_name(devlink, region_name)) {
7548                 err = -EEXIST;
7549                 goto unlock;
7550         }
7551
7552         region = kzalloc(sizeof(*region), GFP_KERNEL);
7553         if (!region) {
7554                 err = -ENOMEM;
7555                 goto unlock;
7556         }
7557
7558         region->devlink = devlink;
7559         region->max_snapshots = region_max_snapshots;
7560         region->name = region_name;
7561         region->size = region_size;
7562         INIT_LIST_HEAD(&region->snapshot_list);
7563         list_add_tail(&region->list, &devlink->region_list);
7564         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
7565
7566         mutex_unlock(&devlink->lock);
7567         return region;
7568
7569 unlock:
7570         mutex_unlock(&devlink->lock);
7571         return ERR_PTR(err);
7572 }
7573 EXPORT_SYMBOL_GPL(devlink_region_create);
7574
7575 /**
7576  *      devlink_region_destroy - destroy address region
7577  *
7578  *      @region: devlink region to destroy
7579  */
7580 void devlink_region_destroy(struct devlink_region *region)
7581 {
7582         struct devlink *devlink = region->devlink;
7583         struct devlink_snapshot *snapshot, *ts;
7584
7585         mutex_lock(&devlink->lock);
7586
7587         /* Free all snapshots of region */
7588         list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
7589                 devlink_region_snapshot_del(region, snapshot);
7590
7591         list_del(&region->list);
7592
7593         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
7594         mutex_unlock(&devlink->lock);
7595         kfree(region);
7596 }
7597 EXPORT_SYMBOL_GPL(devlink_region_destroy);
7598
7599 /**
7600  *      devlink_region_snapshot_id_get - get snapshot ID
7601  *
7602  *      This callback should be called when adding a new snapshot,
7603  *      Driver should use the same id for multiple snapshots taken
7604  *      on multiple regions at the same time/by the same trigger.
7605  *
7606  *      @devlink: devlink
7607  */
7608 u32 devlink_region_snapshot_id_get(struct devlink *devlink)
7609 {
7610         u32 id;
7611
7612         mutex_lock(&devlink->lock);
7613         id = ++devlink->snapshot_id;
7614         mutex_unlock(&devlink->lock);
7615
7616         return id;
7617 }
7618 EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_get);
7619
7620 /**
7621  *      devlink_region_snapshot_create - create a new snapshot
7622  *      This will add a new snapshot of a region. The snapshot
7623  *      will be stored on the region struct and can be accessed
7624  *      from devlink. This is useful for future analyses of snapshots.
7625  *      Multiple snapshots can be created on a region.
7626  *      The @snapshot_id should be obtained using the getter function.
7627  *
7628  *      @region: devlink region of the snapshot
7629  *      @data: snapshot data
7630  *      @snapshot_id: snapshot id to be created
7631  *      @data_destructor: pointer to destructor function to free data
7632  */
7633 int devlink_region_snapshot_create(struct devlink_region *region,
7634                                    u8 *data, u32 snapshot_id,
7635                                    devlink_snapshot_data_dest_t *data_destructor)
7636 {
7637         struct devlink *devlink = region->devlink;
7638         struct devlink_snapshot *snapshot;
7639         int err;
7640
7641         mutex_lock(&devlink->lock);
7642
7643         /* check if region can hold one more snapshot */
7644         if (region->cur_snapshots == region->max_snapshots) {
7645                 err = -ENOMEM;
7646                 goto unlock;
7647         }
7648
7649         if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
7650                 err = -EEXIST;
7651                 goto unlock;
7652         }
7653
7654         snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
7655         if (!snapshot) {
7656                 err = -ENOMEM;
7657                 goto unlock;
7658         }
7659
7660         snapshot->id = snapshot_id;
7661         snapshot->region = region;
7662         snapshot->data = data;
7663         snapshot->data_destructor = data_destructor;
7664
7665         list_add_tail(&snapshot->list, &region->snapshot_list);
7666
7667         region->cur_snapshots++;
7668
7669         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
7670         mutex_unlock(&devlink->lock);
7671         return 0;
7672
7673 unlock:
7674         mutex_unlock(&devlink->lock);
7675         return err;
7676 }
7677 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
7678
7679 #define DEVLINK_TRAP(_id, _type)                                              \
7680         {                                                                     \
7681                 .type = DEVLINK_TRAP_TYPE_##_type,                            \
7682                 .id = DEVLINK_TRAP_GENERIC_ID_##_id,                          \
7683                 .name = DEVLINK_TRAP_GENERIC_NAME_##_id,                      \
7684         }
7685
7686 static const struct devlink_trap devlink_trap_generic[] = {
7687         DEVLINK_TRAP(SMAC_MC, DROP),
7688         DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
7689         DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
7690         DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
7691         DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
7692         DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
7693         DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
7694         DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
7695         DEVLINK_TRAP(TAIL_DROP, DROP),
7696         DEVLINK_TRAP(NON_IP_PACKET, DROP),
7697         DEVLINK_TRAP(UC_DIP_MC_DMAC, DROP),
7698         DEVLINK_TRAP(DIP_LB, DROP),
7699         DEVLINK_TRAP(SIP_MC, DROP),
7700         DEVLINK_TRAP(SIP_LB, DROP),
7701         DEVLINK_TRAP(CORRUPTED_IP_HDR, DROP),
7702         DEVLINK_TRAP(IPV4_SIP_BC, DROP),
7703         DEVLINK_TRAP(IPV6_MC_DIP_RESERVED_SCOPE, DROP),
7704         DEVLINK_TRAP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, DROP),
7705         DEVLINK_TRAP(MTU_ERROR, EXCEPTION),
7706         DEVLINK_TRAP(UNRESOLVED_NEIGH, EXCEPTION),
7707         DEVLINK_TRAP(RPF, EXCEPTION),
7708         DEVLINK_TRAP(REJECT_ROUTE, EXCEPTION),
7709         DEVLINK_TRAP(IPV4_LPM_UNICAST_MISS, EXCEPTION),
7710         DEVLINK_TRAP(IPV6_LPM_UNICAST_MISS, EXCEPTION),
7711         DEVLINK_TRAP(NON_ROUTABLE, DROP),
7712         DEVLINK_TRAP(DECAP_ERROR, EXCEPTION),
7713         DEVLINK_TRAP(OVERLAY_SMAC_MC, DROP),
7714 };
7715
7716 #define DEVLINK_TRAP_GROUP(_id)                                               \
7717         {                                                                     \
7718                 .id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id,                    \
7719                 .name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id,                \
7720         }
7721
7722 static const struct devlink_trap_group devlink_trap_group_generic[] = {
7723         DEVLINK_TRAP_GROUP(L2_DROPS),
7724         DEVLINK_TRAP_GROUP(L3_DROPS),
7725         DEVLINK_TRAP_GROUP(BUFFER_DROPS),
7726         DEVLINK_TRAP_GROUP(TUNNEL_DROPS),
7727 };
7728
7729 static int devlink_trap_generic_verify(const struct devlink_trap *trap)
7730 {
7731         if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
7732                 return -EINVAL;
7733
7734         if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
7735                 return -EINVAL;
7736
7737         if (trap->type != devlink_trap_generic[trap->id].type)
7738                 return -EINVAL;
7739
7740         return 0;
7741 }
7742
7743 static int devlink_trap_driver_verify(const struct devlink_trap *trap)
7744 {
7745         int i;
7746
7747         if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
7748                 return -EINVAL;
7749
7750         for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
7751                 if (!strcmp(trap->name, devlink_trap_generic[i].name))
7752                         return -EEXIST;
7753         }
7754
7755         return 0;
7756 }
7757
7758 static int devlink_trap_verify(const struct devlink_trap *trap)
7759 {
7760         if (!trap || !trap->name || !trap->group.name)
7761                 return -EINVAL;
7762
7763         if (trap->generic)
7764                 return devlink_trap_generic_verify(trap);
7765         else
7766                 return devlink_trap_driver_verify(trap);
7767 }
7768
7769 static int
7770 devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
7771 {
7772         if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
7773                 return -EINVAL;
7774
7775         if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
7776                 return -EINVAL;
7777
7778         return 0;
7779 }
7780
7781 static int
7782 devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
7783 {
7784         int i;
7785
7786         if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
7787                 return -EINVAL;
7788
7789         for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
7790                 if (!strcmp(group->name, devlink_trap_group_generic[i].name))
7791                         return -EEXIST;
7792         }
7793
7794         return 0;
7795 }
7796
7797 static int devlink_trap_group_verify(const struct devlink_trap_group *group)
7798 {
7799         if (group->generic)
7800                 return devlink_trap_group_generic_verify(group);
7801         else
7802                 return devlink_trap_group_driver_verify(group);
7803 }
7804
7805 static void
7806 devlink_trap_group_notify(struct devlink *devlink,
7807                           const struct devlink_trap_group_item *group_item,
7808                           enum devlink_command cmd)
7809 {
7810         struct sk_buff *msg;
7811         int err;
7812
7813         WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
7814                      cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
7815
7816         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7817         if (!msg)
7818                 return;
7819
7820         err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
7821                                          0);
7822         if (err) {
7823                 nlmsg_free(msg);
7824                 return;
7825         }
7826
7827         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
7828                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
7829 }
7830
7831 static struct devlink_trap_group_item *
7832 devlink_trap_group_item_create(struct devlink *devlink,
7833                                const struct devlink_trap_group *group)
7834 {
7835         struct devlink_trap_group_item *group_item;
7836         int err;
7837
7838         err = devlink_trap_group_verify(group);
7839         if (err)
7840                 return ERR_PTR(err);
7841
7842         group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
7843         if (!group_item)
7844                 return ERR_PTR(-ENOMEM);
7845
7846         group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
7847         if (!group_item->stats) {
7848                 err = -ENOMEM;
7849                 goto err_stats_alloc;
7850         }
7851
7852         group_item->group = group;
7853         refcount_set(&group_item->refcount, 1);
7854
7855         if (devlink->ops->trap_group_init) {
7856                 err = devlink->ops->trap_group_init(devlink, group);
7857                 if (err)
7858                         goto err_group_init;
7859         }
7860
7861         list_add_tail(&group_item->list, &devlink->trap_group_list);
7862         devlink_trap_group_notify(devlink, group_item,
7863                                   DEVLINK_CMD_TRAP_GROUP_NEW);
7864
7865         return group_item;
7866
7867 err_group_init:
7868         free_percpu(group_item->stats);
7869 err_stats_alloc:
7870         kfree(group_item);
7871         return ERR_PTR(err);
7872 }
7873
7874 static void
7875 devlink_trap_group_item_destroy(struct devlink *devlink,
7876                                 struct devlink_trap_group_item *group_item)
7877 {
7878         devlink_trap_group_notify(devlink, group_item,
7879                                   DEVLINK_CMD_TRAP_GROUP_DEL);
7880         list_del(&group_item->list);
7881         free_percpu(group_item->stats);
7882         kfree(group_item);
7883 }
7884
7885 static struct devlink_trap_group_item *
7886 devlink_trap_group_item_get(struct devlink *devlink,
7887                             const struct devlink_trap_group *group)
7888 {
7889         struct devlink_trap_group_item *group_item;
7890
7891         group_item = devlink_trap_group_item_lookup(devlink, group->name);
7892         if (group_item) {
7893                 refcount_inc(&group_item->refcount);
7894                 return group_item;
7895         }
7896
7897         return devlink_trap_group_item_create(devlink, group);
7898 }
7899
7900 static void
7901 devlink_trap_group_item_put(struct devlink *devlink,
7902                             struct devlink_trap_group_item *group_item)
7903 {
7904         if (!refcount_dec_and_test(&group_item->refcount))
7905                 return;
7906
7907         devlink_trap_group_item_destroy(devlink, group_item);
7908 }
7909
7910 static int
7911 devlink_trap_item_group_link(struct devlink *devlink,
7912                              struct devlink_trap_item *trap_item)
7913 {
7914         struct devlink_trap_group_item *group_item;
7915
7916         group_item = devlink_trap_group_item_get(devlink,
7917                                                  &trap_item->trap->group);
7918         if (IS_ERR(group_item))
7919                 return PTR_ERR(group_item);
7920
7921         trap_item->group_item = group_item;
7922
7923         return 0;
7924 }
7925
7926 static void
7927 devlink_trap_item_group_unlink(struct devlink *devlink,
7928                                struct devlink_trap_item *trap_item)
7929 {
7930         devlink_trap_group_item_put(devlink, trap_item->group_item);
7931 }
7932
7933 static void devlink_trap_notify(struct devlink *devlink,
7934                                 const struct devlink_trap_item *trap_item,
7935                                 enum devlink_command cmd)
7936 {
7937         struct sk_buff *msg;
7938         int err;
7939
7940         WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
7941                      cmd != DEVLINK_CMD_TRAP_DEL);
7942
7943         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7944         if (!msg)
7945                 return;
7946
7947         err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
7948         if (err) {
7949                 nlmsg_free(msg);
7950                 return;
7951         }
7952
7953         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
7954                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
7955 }
7956
7957 static int
7958 devlink_trap_register(struct devlink *devlink,
7959                       const struct devlink_trap *trap, void *priv)
7960 {
7961         struct devlink_trap_item *trap_item;
7962         int err;
7963
7964         if (devlink_trap_item_lookup(devlink, trap->name))
7965                 return -EEXIST;
7966
7967         trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
7968         if (!trap_item)
7969                 return -ENOMEM;
7970
7971         trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
7972         if (!trap_item->stats) {
7973                 err = -ENOMEM;
7974                 goto err_stats_alloc;
7975         }
7976
7977         trap_item->trap = trap;
7978         trap_item->action = trap->init_action;
7979         trap_item->priv = priv;
7980
7981         err = devlink_trap_item_group_link(devlink, trap_item);
7982         if (err)
7983                 goto err_group_link;
7984
7985         err = devlink->ops->trap_init(devlink, trap, trap_item);
7986         if (err)
7987                 goto err_trap_init;
7988
7989         list_add_tail(&trap_item->list, &devlink->trap_list);
7990         devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
7991
7992         return 0;
7993
7994 err_trap_init:
7995         devlink_trap_item_group_unlink(devlink, trap_item);
7996 err_group_link:
7997         free_percpu(trap_item->stats);
7998 err_stats_alloc:
7999         kfree(trap_item);
8000         return err;
8001 }
8002
8003 static void devlink_trap_unregister(struct devlink *devlink,
8004                                     const struct devlink_trap *trap)
8005 {
8006         struct devlink_trap_item *trap_item;
8007
8008         trap_item = devlink_trap_item_lookup(devlink, trap->name);
8009         if (WARN_ON_ONCE(!trap_item))
8010                 return;
8011
8012         devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
8013         list_del(&trap_item->list);
8014         if (devlink->ops->trap_fini)
8015                 devlink->ops->trap_fini(devlink, trap, trap_item);
8016         devlink_trap_item_group_unlink(devlink, trap_item);
8017         free_percpu(trap_item->stats);
8018         kfree(trap_item);
8019 }
8020
8021 static void devlink_trap_disable(struct devlink *devlink,
8022                                  const struct devlink_trap *trap)
8023 {
8024         struct devlink_trap_item *trap_item;
8025
8026         trap_item = devlink_trap_item_lookup(devlink, trap->name);
8027         if (WARN_ON_ONCE(!trap_item))
8028                 return;
8029
8030         devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP);
8031         trap_item->action = DEVLINK_TRAP_ACTION_DROP;
8032 }
8033
8034 /**
8035  * devlink_traps_register - Register packet traps with devlink.
8036  * @devlink: devlink.
8037  * @traps: Packet traps.
8038  * @traps_count: Count of provided packet traps.
8039  * @priv: Driver private information.
8040  *
8041  * Return: Non-zero value on failure.
8042  */
8043 int devlink_traps_register(struct devlink *devlink,
8044                            const struct devlink_trap *traps,
8045                            size_t traps_count, void *priv)
8046 {
8047         int i, err;
8048
8049         if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
8050                 return -EINVAL;
8051
8052         mutex_lock(&devlink->lock);
8053         for (i = 0; i < traps_count; i++) {
8054                 const struct devlink_trap *trap = &traps[i];
8055
8056                 err = devlink_trap_verify(trap);
8057                 if (err)
8058                         goto err_trap_verify;
8059
8060                 err = devlink_trap_register(devlink, trap, priv);
8061                 if (err)
8062                         goto err_trap_register;
8063         }
8064         mutex_unlock(&devlink->lock);
8065
8066         return 0;
8067
8068 err_trap_register:
8069 err_trap_verify:
8070         for (i--; i >= 0; i--)
8071                 devlink_trap_unregister(devlink, &traps[i]);
8072         mutex_unlock(&devlink->lock);
8073         return err;
8074 }
8075 EXPORT_SYMBOL_GPL(devlink_traps_register);
8076
8077 /**
8078  * devlink_traps_unregister - Unregister packet traps from devlink.
8079  * @devlink: devlink.
8080  * @traps: Packet traps.
8081  * @traps_count: Count of provided packet traps.
8082  */
8083 void devlink_traps_unregister(struct devlink *devlink,
8084                               const struct devlink_trap *traps,
8085                               size_t traps_count)
8086 {
8087         int i;
8088
8089         mutex_lock(&devlink->lock);
8090         /* Make sure we do not have any packets in-flight while unregistering
8091          * traps by disabling all of them and waiting for a grace period.
8092          */
8093         for (i = traps_count - 1; i >= 0; i--)
8094                 devlink_trap_disable(devlink, &traps[i]);
8095         synchronize_rcu();
8096         for (i = traps_count - 1; i >= 0; i--)
8097                 devlink_trap_unregister(devlink, &traps[i]);
8098         mutex_unlock(&devlink->lock);
8099 }
8100 EXPORT_SYMBOL_GPL(devlink_traps_unregister);
8101
8102 static void
8103 devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
8104                           size_t skb_len)
8105 {
8106         struct devlink_stats *stats;
8107
8108         stats = this_cpu_ptr(trap_stats);
8109         u64_stats_update_begin(&stats->syncp);
8110         stats->rx_bytes += skb_len;
8111         stats->rx_packets++;
8112         u64_stats_update_end(&stats->syncp);
8113 }
8114
8115 static void
8116 devlink_trap_report_metadata_fill(struct net_dm_hw_metadata *hw_metadata,
8117                                   const struct devlink_trap_item *trap_item,
8118                                   struct devlink_port *in_devlink_port)
8119 {
8120         struct devlink_trap_group_item *group_item = trap_item->group_item;
8121
8122         hw_metadata->trap_group_name = group_item->group->name;
8123         hw_metadata->trap_name = trap_item->trap->name;
8124
8125         spin_lock(&in_devlink_port->type_lock);
8126         if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
8127                 hw_metadata->input_dev = in_devlink_port->type_dev;
8128         spin_unlock(&in_devlink_port->type_lock);
8129 }
8130
8131 /**
8132  * devlink_trap_report - Report trapped packet to drop monitor.
8133  * @devlink: devlink.
8134  * @skb: Trapped packet.
8135  * @trap_ctx: Trap context.
8136  * @in_devlink_port: Input devlink port.
8137  */
8138 void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
8139                          void *trap_ctx, struct devlink_port *in_devlink_port)
8140 {
8141         struct devlink_trap_item *trap_item = trap_ctx;
8142         struct net_dm_hw_metadata hw_metadata = {};
8143
8144         devlink_trap_stats_update(trap_item->stats, skb->len);
8145         devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
8146
8147         devlink_trap_report_metadata_fill(&hw_metadata, trap_item,
8148                                           in_devlink_port);
8149         net_dm_hw_report(skb, &hw_metadata);
8150 }
8151 EXPORT_SYMBOL_GPL(devlink_trap_report);
8152
8153 /**
8154  * devlink_trap_ctx_priv - Trap context to driver private information.
8155  * @trap_ctx: Trap context.
8156  *
8157  * Return: Driver private information passed during registration.
8158  */
8159 void *devlink_trap_ctx_priv(void *trap_ctx)
8160 {
8161         struct devlink_trap_item *trap_item = trap_ctx;
8162
8163         return trap_item->priv;
8164 }
8165 EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
8166
8167 static void __devlink_compat_running_version(struct devlink *devlink,
8168                                              char *buf, size_t len)
8169 {
8170         const struct nlattr *nlattr;
8171         struct devlink_info_req req;
8172         struct sk_buff *msg;
8173         int rem, err;
8174
8175         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8176         if (!msg)
8177                 return;
8178
8179         req.msg = msg;
8180         err = devlink->ops->info_get(devlink, &req, NULL);
8181         if (err)
8182                 goto free_msg;
8183
8184         nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
8185                 const struct nlattr *kv;
8186                 int rem_kv;
8187
8188                 if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
8189                         continue;
8190
8191                 nla_for_each_nested(kv, nlattr, rem_kv) {
8192                         if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
8193                                 continue;
8194
8195                         strlcat(buf, nla_data(kv), len);
8196                         strlcat(buf, " ", len);
8197                 }
8198         }
8199 free_msg:
8200         nlmsg_free(msg);
8201 }
8202
8203 void devlink_compat_running_version(struct net_device *dev,
8204                                     char *buf, size_t len)
8205 {
8206         struct devlink *devlink;
8207
8208         dev_hold(dev);
8209         rtnl_unlock();
8210
8211         devlink = netdev_to_devlink(dev);
8212         if (!devlink || !devlink->ops->info_get)
8213                 goto out;
8214
8215         mutex_lock(&devlink->lock);
8216         __devlink_compat_running_version(devlink, buf, len);
8217         mutex_unlock(&devlink->lock);
8218
8219 out:
8220         rtnl_lock();
8221         dev_put(dev);
8222 }
8223
8224 int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
8225 {
8226         struct devlink *devlink;
8227         int ret;
8228
8229         dev_hold(dev);
8230         rtnl_unlock();
8231
8232         devlink = netdev_to_devlink(dev);
8233         if (!devlink || !devlink->ops->flash_update) {
8234                 ret = -EOPNOTSUPP;
8235                 goto out;
8236         }
8237
8238         mutex_lock(&devlink->lock);
8239         ret = devlink->ops->flash_update(devlink, file_name, NULL, NULL);
8240         mutex_unlock(&devlink->lock);
8241
8242 out:
8243         rtnl_lock();
8244         dev_put(dev);
8245
8246         return ret;
8247 }
8248
8249 int devlink_compat_phys_port_name_get(struct net_device *dev,
8250                                       char *name, size_t len)
8251 {
8252         struct devlink_port *devlink_port;
8253
8254         /* RTNL mutex is held here which ensures that devlink_port
8255          * instance cannot disappear in the middle. No need to take
8256          * any devlink lock as only permanent values are accessed.
8257          */
8258         ASSERT_RTNL();
8259
8260         devlink_port = netdev_to_devlink_port(dev);
8261         if (!devlink_port)
8262                 return -EOPNOTSUPP;
8263
8264         return __devlink_port_phys_port_name_get(devlink_port, name, len);
8265 }
8266
8267 int devlink_compat_switch_id_get(struct net_device *dev,
8268                                  struct netdev_phys_item_id *ppid)
8269 {
8270         struct devlink_port *devlink_port;
8271
8272         /* Caller must hold RTNL mutex or reference to dev, which ensures that
8273          * devlink_port instance cannot disappear in the middle. No need to take
8274          * any devlink lock as only permanent values are accessed.
8275          */
8276         devlink_port = netdev_to_devlink_port(dev);
8277         if (!devlink_port || !devlink_port->attrs.switch_port)
8278                 return -EOPNOTSUPP;
8279
8280         memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
8281
8282         return 0;
8283 }
8284
8285 static void __net_exit devlink_pernet_pre_exit(struct net *net)
8286 {
8287         struct devlink *devlink;
8288         int err;
8289
8290         /* In case network namespace is getting destroyed, reload
8291          * all devlink instances from this namespace into init_net.
8292          */
8293         mutex_lock(&devlink_mutex);
8294         list_for_each_entry(devlink, &devlink_list, list) {
8295                 if (net_eq(devlink_net(devlink), net)) {
8296                         if (WARN_ON(!devlink_reload_supported(devlink)))
8297                                 continue;
8298                         err = devlink_reload(devlink, &init_net, NULL);
8299                         if (err && err != -EOPNOTSUPP)
8300                                 pr_warn("Failed to reload devlink instance into init_net\n");
8301                 }
8302         }
8303         mutex_unlock(&devlink_mutex);
8304 }
8305
8306 static struct pernet_operations devlink_pernet_ops __net_initdata = {
8307         .pre_exit = devlink_pernet_pre_exit,
8308 };
8309
8310 static int __init devlink_init(void)
8311 {
8312         int err;
8313
8314         err = genl_register_family(&devlink_nl_family);
8315         if (err)
8316                 goto out;
8317         err = register_pernet_subsys(&devlink_pernet_ops);
8318
8319 out:
8320         WARN_ON(err);
8321         return err;
8322 }
8323
8324 subsys_initcall(devlink_init);