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 static struct net *devlink_net(const struct devlink *devlink)
  99 {
 100         return read_pnet(&devlink->_net);
 101 }
 102
 103 static void devlink_net_set(struct devlink *devlink, struct net *net)
 104 {
 105         write_pnet(&devlink->_net, net);
 106 }
 107
 108 static struct devlink *devlink_get_from_attrs(struct net *net,
 109                                               struct nlattr **attrs)
 110 {
 111         struct devlink *devlink;
 112         char *busname;
 113         char *devname;
 114
 115         if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])
 116                 return ERR_PTR(-EINVAL);
 117
 118         busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
 119         devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
 120
 121         lockdep_assert_held(&devlink_mutex);
 122
 123         list_for_each_entry(devlink, &devlink_list, list) {
 124                 if (strcmp(devlink->dev->bus->name, busname) == 0 &&
 125                     strcmp(dev_name(devlink->dev), devname) == 0 &&
 126                     net_eq(devlink_net(devlink), net))
 127                         return devlink;
 128         }
 129
 130         return ERR_PTR(-ENODEV);
 131 }
 132
 133 static struct devlink *devlink_get_from_info(struct genl_info *info)
 134 {
 135         return devlink_get_from_attrs(genl_info_net(info), info->attrs);
 136 }
 137
 138 static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
 139                                                       unsigned int port_index)
 140 {
 141         struct devlink_port *devlink_port;
 142
 143         list_for_each_entry(devlink_port, &devlink->port_list, list) {
 144                 if (devlink_port->index == port_index)
 145                         return devlink_port;
 146         }
 147         return NULL;
 148 }
 149
 150 static bool devlink_port_index_exists(struct devlink *devlink,
 151                                       unsigned int port_index)
 152 {
 153         return devlink_port_get_by_index(devlink, port_index);
 154 }
 155
 156 static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
 157                                                         struct nlattr **attrs)
 158 {
 159         if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
 160                 u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
 161                 struct devlink_port *devlink_port;
 162
 163                 devlink_port = devlink_port_get_by_index(devlink, port_index);
 164                 if (!devlink_port)
 165                         return ERR_PTR(-ENODEV);
 166                 return devlink_port;
 167         }
 168         return ERR_PTR(-EINVAL);
 169 }
 170
 171 static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
 172                                                        struct genl_info *info)
 173 {
 174         return devlink_port_get_from_attrs(devlink, info->attrs);
 175 }
 176
 177 struct devlink_sb {
 178         struct list_head list;
 179         unsigned int index;
 180         u32 size;
 181         u16 ingress_pools_count;
 182         u16 egress_pools_count;
 183         u16 ingress_tc_count;
 184         u16 egress_tc_count;
 185 };
 186
 187 static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb)
 188 {
 189         return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count;
 190 }
 191
 192 static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink,
 193                                                   unsigned int sb_index)
 194 {
 195         struct devlink_sb *devlink_sb;
 196
 197         list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
 198                 if (devlink_sb->index == sb_index)
 199                         return devlink_sb;
 200         }
 201         return NULL;
 202 }
 203
 204 static bool devlink_sb_index_exists(struct devlink *devlink,
 205                                     unsigned int sb_index)
 206 {
 207         return devlink_sb_get_by_index(devlink, sb_index);
 208 }
 209
 210 static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink,
 211                                                     struct nlattr **attrs)
 212 {
 213         if (attrs[DEVLINK_ATTR_SB_INDEX]) {
 214                 u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]);
 215                 struct devlink_sb *devlink_sb;
 216
 217                 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
 218                 if (!devlink_sb)
 219                         return ERR_PTR(-ENODEV);
 220                 return devlink_sb;
 221         }
 222         return ERR_PTR(-EINVAL);
 223 }
 224
 225 static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink,
 226                                                    struct genl_info *info)
 227 {
 228         return devlink_sb_get_from_attrs(devlink, info->attrs);
 229 }
 230
 231 static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb,
 232                                                 struct nlattr **attrs,
 233                                                 u16 *p_pool_index)
 234 {
 235         u16 val;
 236
 237         if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX])
 238                 return -EINVAL;
 239
 240         val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]);
 241         if (val >= devlink_sb_pool_count(devlink_sb))
 242                 return -EINVAL;
 243         *p_pool_index = val;
 244         return 0;
 245 }
 246
 247 static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb,
 248                                                struct genl_info *info,
 249                                                u16 *p_pool_index)
 250 {
 251         return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs,
 252                                                     p_pool_index);
 253 }
 254
 255 static int
 256 devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs,
 257                                     enum devlink_sb_pool_type *p_pool_type)
 258 {
 259         u8 val;
 260
 261         if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE])
 262                 return -EINVAL;
 263
 264         val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]);
 265         if (val != DEVLINK_SB_POOL_TYPE_INGRESS &&
 266             val != DEVLINK_SB_POOL_TYPE_EGRESS)
 267                 return -EINVAL;
 268         *p_pool_type = val;
 269         return 0;
 270 }
 271
 272 static int
 273 devlink_sb_pool_type_get_from_info(struct genl_info *info,
 274                                    enum devlink_sb_pool_type *p_pool_type)
 275 {
 276         return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type);
 277 }
 278
 279 static int
 280 devlink_sb_th_type_get_from_attrs(struct nlattr **attrs,
 281                                   enum devlink_sb_threshold_type *p_th_type)
 282 {
 283         u8 val;
 284
 285         if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])
 286                 return -EINVAL;
 287
 288         val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]);
 289         if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC &&
 290             val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC)
 291                 return -EINVAL;
 292         *p_th_type = val;
 293         return 0;
 294 }
 295
 296 static int
 297 devlink_sb_th_type_get_from_info(struct genl_info *info,
 298                                  enum devlink_sb_threshold_type *p_th_type)
 299 {
 300         return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type);
 301 }
 302
 303 static int
 304 devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb,
 305                                    struct nlattr **attrs,
 306                                    enum devlink_sb_pool_type pool_type,
 307                                    u16 *p_tc_index)
 308 {
 309         u16 val;
 310
 311         if (!attrs[DEVLINK_ATTR_SB_TC_INDEX])
 312                 return -EINVAL;
 313
 314         val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]);
 315         if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS &&
 316             val >= devlink_sb->ingress_tc_count)
 317                 return -EINVAL;
 318         if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS &&
 319             val >= devlink_sb->egress_tc_count)
 320                 return -EINVAL;
 321         *p_tc_index = val;
 322         return 0;
 323 }
 324
 325 static int
 326 devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
 327                                   struct genl_info *info,
 328                                   enum devlink_sb_pool_type pool_type,
 329                                   u16 *p_tc_index)
 330 {
 331         return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs,
 332                                                   pool_type, p_tc_index);
 333 }
 334
 335 struct devlink_region {
 336         struct devlink *devlink;
 337         struct list_head list;
 338         const char *name;
 339         struct list_head snapshot_list;
 340         u32 max_snapshots;
 341         u32 cur_snapshots;
 342         u64 size;
 343 };
 344
 345 struct devlink_snapshot {
 346         struct list_head list;
 347         struct devlink_region *region;
 348         devlink_snapshot_data_dest_t *data_destructor;
 349         u8 *data;
 350         u32 id;
 351 };
 352
 353 static struct devlink_region *
 354 devlink_region_get_by_name(struct devlink *devlink, const char *region_name)
 355 {
 356         struct devlink_region *region;
 357
 358         list_for_each_entry(region, &devlink->region_list, list)
 359                 if (!strcmp(region->name, region_name))
 360                         return region;
 361
 362         return NULL;
 363 }
 364
 365 static struct devlink_snapshot *
 366 devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id)
 367 {
 368         struct devlink_snapshot *snapshot;
 369
 370         list_for_each_entry(snapshot, &region->snapshot_list, list)
 371                 if (snapshot->id == id)
 372                         return snapshot;
 373
 374         return NULL;
 375 }
 376
 377 #define DEVLINK_NL_FLAG_NEED_DEVLINK    BIT(0)
 378 #define DEVLINK_NL_FLAG_NEED_PORT       BIT(1)
 379 #define DEVLINK_NL_FLAG_NEED_SB         BIT(2)
 380
 381 /* The per devlink instance lock is taken by default in the pre-doit
 382  * operation, yet several commands do not require this. The global
 383  * devlink lock is taken and protects from disruption by user-calls.
 384  */
 385 #define DEVLINK_NL_FLAG_NO_LOCK         BIT(3)
 386
 387 static int devlink_nl_pre_doit(const struct genl_ops *ops,
 388                                struct sk_buff *skb, struct genl_info *info)
 389 {
 390         struct devlink *devlink;
 391         int err;
 392
 393         mutex_lock(&devlink_mutex);
 394         devlink = devlink_get_from_info(info);
 395         if (IS_ERR(devlink)) {
 396                 mutex_unlock(&devlink_mutex);
 397                 return PTR_ERR(devlink);
 398         }
 399         if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
 400                 mutex_lock(&devlink->lock);
 401         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
 402                 info->user_ptr[0] = devlink;
 403         } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
 404                 struct devlink_port *devlink_port;
 405
 406                 devlink_port = devlink_port_get_from_info(devlink, info);
 407                 if (IS_ERR(devlink_port)) {
 408                         err = PTR_ERR(devlink_port);
 409                         goto unlock;
 410                 }
 411                 info->user_ptr[0] = devlink_port;
 412         }
 413         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_SB) {
 414                 struct devlink_sb *devlink_sb;
 415
 416                 devlink_sb = devlink_sb_get_from_info(devlink, info);
 417                 if (IS_ERR(devlink_sb)) {
 418                         err = PTR_ERR(devlink_sb);
 419                         goto unlock;
 420                 }
 421                 info->user_ptr[1] = devlink_sb;
 422         }
 423         return 0;
 424
 425 unlock:
 426         if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
 427                 mutex_unlock(&devlink->lock);
 428         mutex_unlock(&devlink_mutex);
 429         return err;
 430 }
 431
 432 static void devlink_nl_post_doit(const struct genl_ops *ops,
 433                                  struct sk_buff *skb, struct genl_info *info)
 434 {
 435         struct devlink *devlink;
 436
 437         devlink = devlink_get_from_info(info);
 438         if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
 439                 mutex_unlock(&devlink->lock);
 440         mutex_unlock(&devlink_mutex);
 441 }
 442
 443 static struct genl_family devlink_nl_family;
 444
 445 enum devlink_multicast_groups {
 446         DEVLINK_MCGRP_CONFIG,
 447 };
 448
 449 static const struct genl_multicast_group devlink_nl_mcgrps[] = {
 450         [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },
 451 };
 452
 453 static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
 454 {
 455         if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
 456                 return -EMSGSIZE;
 457         if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
 458                 return -EMSGSIZE;
 459         return 0;
 460 }
 461
 462 static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
 463                            enum devlink_command cmd, u32 portid,
 464                            u32 seq, int flags)
 465 {
 466         void *hdr;
 467
 468         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 469         if (!hdr)
 470                 return -EMSGSIZE;
 471
 472         if (devlink_nl_put_handle(msg, devlink))
 473                 goto nla_put_failure;
 474         if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_FAILED, devlink->reload_failed))
 475                 goto nla_put_failure;
 476
 477         genlmsg_end(msg, hdr);
 478         return 0;
 479
 480 nla_put_failure:
 481         genlmsg_cancel(msg, hdr);
 482         return -EMSGSIZE;
 483 }
 484
 485 static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
 486 {
 487         struct sk_buff *msg;
 488         int err;
 489
 490         WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
 491
 492         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 493         if (!msg)
 494                 return;
 495
 496         err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
 497         if (err) {
 498                 nlmsg_free(msg);
 499                 return;
 500         }
 501
 502         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
 503                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
 504 }
 505
 506 static int devlink_nl_port_attrs_put(struct sk_buff *msg,
 507                                      struct devlink_port *devlink_port)
 508 {
 509         struct devlink_port_attrs *attrs = &devlink_port->attrs;
 510
 511         if (!attrs->set)
 512                 return 0;
 513         if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
 514                 return -EMSGSIZE;
 515         switch (devlink_port->attrs.flavour) {
 516         case DEVLINK_PORT_FLAVOUR_PCI_PF:
 517                 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
 518                                 attrs->pci_pf.pf))
 519                         return -EMSGSIZE;
 520                 break;
 521         case DEVLINK_PORT_FLAVOUR_PCI_VF:
 522                 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
 523                                 attrs->pci_vf.pf) ||
 524                     nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER,
 525                                 attrs->pci_vf.vf))
 526                         return -EMSGSIZE;
 527                 break;
 528         case DEVLINK_PORT_FLAVOUR_PHYSICAL:
 529         case DEVLINK_PORT_FLAVOUR_CPU:
 530         case DEVLINK_PORT_FLAVOUR_DSA:
 531                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER,
 532                                 attrs->phys.port_number))
 533                         return -EMSGSIZE;
 534                 if (!attrs->split)
 535                         return 0;
 536                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
 537                                 attrs->phys.port_number))
 538                         return -EMSGSIZE;
 539                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
 540                                 attrs->phys.split_subport_number))
 541                         return -EMSGSIZE;
 542                 break;
 543         default:
 544                 break;
 545         }
 546         return 0;
 547 }
 548
 549 static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
 550                                 struct devlink_port *devlink_port,
 551                                 enum devlink_command cmd, u32 portid,
 552                                 u32 seq, int flags)
 553 {
 554         void *hdr;
 555
 556         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 557         if (!hdr)
 558                 return -EMSGSIZE;
 559
 560         if (devlink_nl_put_handle(msg, devlink))
 561                 goto nla_put_failure;
 562         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
 563                 goto nla_put_failure;
 564
 565         spin_lock_bh(&devlink_port->type_lock);
 566         if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
 567                 goto nla_put_failure_type_locked;
 568         if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
 569             nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
 570                         devlink_port->desired_type))
 571                 goto nla_put_failure_type_locked;
 572         if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
 573                 struct net_device *netdev = devlink_port->type_dev;
 574
 575                 if (netdev &&
 576                     (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
 577                                  netdev->ifindex) ||
 578                      nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
 579                                     netdev->name)))
 580                         goto nla_put_failure_type_locked;
 581         }
 582         if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
 583                 struct ib_device *ibdev = devlink_port->type_dev;
 584
 585                 if (ibdev &&
 586                     nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
 587                                    ibdev->name))
 588                         goto nla_put_failure_type_locked;
 589         }
 590         spin_unlock_bh(&devlink_port->type_lock);
 591         if (devlink_nl_port_attrs_put(msg, devlink_port))
 592                 goto nla_put_failure;
 593
 594         genlmsg_end(msg, hdr);
 595         return 0;
 596
 597 nla_put_failure_type_locked:
 598         spin_unlock_bh(&devlink_port->type_lock);
 599 nla_put_failure:
 600         genlmsg_cancel(msg, hdr);
 601         return -EMSGSIZE;
 602 }
 603
 604 static void devlink_port_notify(struct devlink_port *devlink_port,
 605                                 enum devlink_command cmd)
 606 {
 607         struct devlink *devlink = devlink_port->devlink;
 608         struct sk_buff *msg;
 609         int err;
 610
 611         if (!devlink_port->registered)
 612                 return;
 613
 614         WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
 615
 616         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 617         if (!msg)
 618                 return;
 619
 620         err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0);
 621         if (err) {
 622                 nlmsg_free(msg);
 623                 return;
 624         }
 625
 626         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
 627                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
 628 }
 629
 630 static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info)
 631 {
 632         struct devlink *devlink = info->user_ptr[0];
 633         struct sk_buff *msg;
 634         int err;
 635
 636         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 637         if (!msg)
 638                 return -ENOMEM;
 639
 640         err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
 641                               info->snd_portid, info->snd_seq, 0);
 642         if (err) {
 643                 nlmsg_free(msg);
 644                 return err;
 645         }
 646
 647         return genlmsg_reply(msg, info);
 648 }
 649
 650 static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg,
 651                                      struct netlink_callback *cb)
 652 {
 653         struct devlink *devlink;
 654         int start = cb->args[0];
 655         int idx = 0;
 656         int err;
 657
 658         mutex_lock(&devlink_mutex);
 659         list_for_each_entry(devlink, &devlink_list, list) {
 660                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 661                         continue;
 662                 if (idx < start) {
 663                         idx++;
 664                         continue;
 665                 }
 666                 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
 667                                       NETLINK_CB(cb->skb).portid,
 668                                       cb->nlh->nlmsg_seq, NLM_F_MULTI);
 669                 if (err)
 670                         goto out;
 671                 idx++;
 672         }
 673 out:
 674         mutex_unlock(&devlink_mutex);
 675
 676         cb->args[0] = idx;
 677         return msg->len;
 678 }
 679
 680 static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
 681                                         struct genl_info *info)
 682 {
 683         struct devlink_port *devlink_port = info->user_ptr[0];
 684         struct devlink *devlink = devlink_port->devlink;
 685         struct sk_buff *msg;
 686         int err;
 687
 688         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 689         if (!msg)
 690                 return -ENOMEM;
 691
 692         err = devlink_nl_port_fill(msg, devlink, devlink_port,
 693                                    DEVLINK_CMD_PORT_NEW,
 694                                    info->snd_portid, info->snd_seq, 0);
 695         if (err) {
 696                 nlmsg_free(msg);
 697                 return err;
 698         }
 699
 700         return genlmsg_reply(msg, info);
 701 }
 702
 703 static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
 704                                           struct netlink_callback *cb)
 705 {
 706         struct devlink *devlink;
 707         struct devlink_port *devlink_port;
 708         int start = cb->args[0];
 709         int idx = 0;
 710         int err;
 711
 712         mutex_lock(&devlink_mutex);
 713         list_for_each_entry(devlink, &devlink_list, list) {
 714                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 715                         continue;
 716                 mutex_lock(&devlink->lock);
 717                 list_for_each_entry(devlink_port, &devlink->port_list, list) {
 718                         if (idx < start) {
 719                                 idx++;
 720                                 continue;
 721                         }
 722                         err = devlink_nl_port_fill(msg, devlink, devlink_port,
 723                                                    DEVLINK_CMD_NEW,
 724                                                    NETLINK_CB(cb->skb).portid,
 725                                                    cb->nlh->nlmsg_seq,
 726                                                    NLM_F_MULTI);
 727                         if (err) {
 728                                 mutex_unlock(&devlink->lock);
 729                                 goto out;
 730                         }
 731                         idx++;
 732                 }
 733                 mutex_unlock(&devlink->lock);
 734         }
 735 out:
 736         mutex_unlock(&devlink_mutex);
 737
 738         cb->args[0] = idx;
 739         return msg->len;
 740 }
 741
 742 static int devlink_port_type_set(struct devlink *devlink,
 743                                  struct devlink_port *devlink_port,
 744                                  enum devlink_port_type port_type)
 745
 746 {
 747         int err;
 748
 749         if (devlink->ops->port_type_set) {
 750                 if (port_type == DEVLINK_PORT_TYPE_NOTSET)
 751                         return -EINVAL;
 752                 if (port_type == devlink_port->type)
 753                         return 0;
 754                 err = devlink->ops->port_type_set(devlink_port, port_type);
 755                 if (err)
 756                         return err;
 757                 devlink_port->desired_type = port_type;
 758                 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
 759                 return 0;
 760         }
 761         return -EOPNOTSUPP;
 762 }
 763
 764 static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
 765                                         struct genl_info *info)
 766 {
 767         struct devlink_port *devlink_port = info->user_ptr[0];
 768         struct devlink *devlink = devlink_port->devlink;
 769         int err;
 770
 771         if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
 772                 enum devlink_port_type port_type;
 773
 774                 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
 775                 err = devlink_port_type_set(devlink, devlink_port, port_type);
 776                 if (err)
 777                         return err;
 778         }
 779         return 0;
 780 }
 781
 782 static int devlink_port_split(struct devlink *devlink, u32 port_index,
 783                               u32 count, struct netlink_ext_ack *extack)
 784
 785 {
 786         if (devlink->ops->port_split)
 787                 return devlink->ops->port_split(devlink, port_index, count,
 788                                                 extack);
 789         return -EOPNOTSUPP;
 790 }
 791
 792 static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
 793                                           struct genl_info *info)
 794 {
 795         struct devlink *devlink = info->user_ptr[0];
 796         u32 port_index;
 797         u32 count;
 798
 799         if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
 800             !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
 801                 return -EINVAL;
 802
 803         port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
 804         count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
 805         return devlink_port_split(devlink, port_index, count, info->extack);
 806 }
 807
 808 static int devlink_port_unsplit(struct devlink *devlink, u32 port_index,
 809                                 struct netlink_ext_ack *extack)
 810
 811 {
 812         if (devlink->ops->port_unsplit)
 813                 return devlink->ops->port_unsplit(devlink, port_index, extack);
 814         return -EOPNOTSUPP;
 815 }
 816
 817 static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
 818                                             struct genl_info *info)
 819 {
 820         struct devlink *devlink = info->user_ptr[0];
 821         u32 port_index;
 822
 823         if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
 824                 return -EINVAL;
 825
 826         port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
 827         return devlink_port_unsplit(devlink, port_index, info->extack);
 828 }
 829
 830 static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
 831                               struct devlink_sb *devlink_sb,
 832                               enum devlink_command cmd, u32 portid,
 833                               u32 seq, int flags)
 834 {
 835         void *hdr;
 836
 837         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 838         if (!hdr)
 839                 return -EMSGSIZE;
 840
 841         if (devlink_nl_put_handle(msg, devlink))
 842                 goto nla_put_failure;
 843         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
 844                 goto nla_put_failure;
 845         if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size))
 846                 goto nla_put_failure;
 847         if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT,
 848                         devlink_sb->ingress_pools_count))
 849                 goto nla_put_failure;
 850         if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT,
 851                         devlink_sb->egress_pools_count))
 852                 goto nla_put_failure;
 853         if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT,
 854                         devlink_sb->ingress_tc_count))
 855                 goto nla_put_failure;
 856         if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT,
 857                         devlink_sb->egress_tc_count))
 858                 goto nla_put_failure;
 859
 860         genlmsg_end(msg, hdr);
 861         return 0;
 862
 863 nla_put_failure:
 864         genlmsg_cancel(msg, hdr);
 865         return -EMSGSIZE;
 866 }
 867
 868 static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb,
 869                                       struct genl_info *info)
 870 {
 871         struct devlink *devlink = info->user_ptr[0];
 872         struct devlink_sb *devlink_sb = info->user_ptr[1];
 873         struct sk_buff *msg;
 874         int err;
 875
 876         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 877         if (!msg)
 878                 return -ENOMEM;
 879
 880         err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
 881                                  DEVLINK_CMD_SB_NEW,
 882                                  info->snd_portid, info->snd_seq, 0);
 883         if (err) {
 884                 nlmsg_free(msg);
 885                 return err;
 886         }
 887
 888         return genlmsg_reply(msg, info);
 889 }
 890
 891 static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
 892                                         struct netlink_callback *cb)
 893 {
 894         struct devlink *devlink;
 895         struct devlink_sb *devlink_sb;
 896         int start = cb->args[0];
 897         int idx = 0;
 898         int err;
 899
 900         mutex_lock(&devlink_mutex);
 901         list_for_each_entry(devlink, &devlink_list, list) {
 902                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 903                         continue;
 904                 mutex_lock(&devlink->lock);
 905                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
 906                         if (idx < start) {
 907                                 idx++;
 908                                 continue;
 909                         }
 910                         err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
 911                                                  DEVLINK_CMD_SB_NEW,
 912                                                  NETLINK_CB(cb->skb).portid,
 913                                                  cb->nlh->nlmsg_seq,
 914                                                  NLM_F_MULTI);
 915                         if (err) {
 916                                 mutex_unlock(&devlink->lock);
 917                                 goto out;
 918                         }
 919                         idx++;
 920                 }
 921                 mutex_unlock(&devlink->lock);
 922         }
 923 out:
 924         mutex_unlock(&devlink_mutex);
 925
 926         cb->args[0] = idx;
 927         return msg->len;
 928 }
 929
 930 static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink,
 931                                    struct devlink_sb *devlink_sb,
 932                                    u16 pool_index, enum devlink_command cmd,
 933                                    u32 portid, u32 seq, int flags)
 934 {
 935         struct devlink_sb_pool_info pool_info;
 936         void *hdr;
 937         int err;
 938
 939         err = devlink->ops->sb_pool_get(devlink, devlink_sb->index,
 940                                         pool_index, &pool_info);
 941         if (err)
 942                 return err;
 943
 944         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 945         if (!hdr)
 946                 return -EMSGSIZE;
 947
 948         if (devlink_nl_put_handle(msg, devlink))
 949                 goto nla_put_failure;
 950         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
 951                 goto nla_put_failure;
 952         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
 953                 goto nla_put_failure;
 954         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type))
 955                 goto nla_put_failure;
 956         if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size))
 957                 goto nla_put_failure;
 958         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
 959                        pool_info.threshold_type))
 960                 goto nla_put_failure;
 961         if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_CELL_SIZE,
 962                         pool_info.cell_size))
 963                 goto nla_put_failure;
 964
 965         genlmsg_end(msg, hdr);
 966         return 0;
 967
 968 nla_put_failure:
 969         genlmsg_cancel(msg, hdr);
 970         return -EMSGSIZE;
 971 }
 972
 973 static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb,
 974                                            struct genl_info *info)
 975 {
 976         struct devlink *devlink = info->user_ptr[0];
 977         struct devlink_sb *devlink_sb = info->user_ptr[1];
 978         struct sk_buff *msg;
 979         u16 pool_index;
 980         int err;
 981
 982         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
 983                                                   &pool_index);
 984         if (err)
 985                 return err;
 986
 987         if (!devlink->ops->sb_pool_get)
 988                 return -EOPNOTSUPP;
 989
 990         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 991         if (!msg)
 992                 return -ENOMEM;
 993
 994         err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index,
 995                                       DEVLINK_CMD_SB_POOL_NEW,
 996                                       info->snd_portid, info->snd_seq, 0);
 997         if (err) {
 998                 nlmsg_free(msg);
 999                 return err;
1000         }
1001
1002         return genlmsg_reply(msg, info);
1003 }
1004
1005 static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1006                                 struct devlink *devlink,
1007                                 struct devlink_sb *devlink_sb,
1008                                 u32 portid, u32 seq)
1009 {
1010         u16 pool_count = devlink_sb_pool_count(devlink_sb);
1011         u16 pool_index;
1012         int err;
1013
1014         for (pool_index = 0; pool_index < pool_count; pool_index++) {
1015                 if (*p_idx < start) {
1016                         (*p_idx)++;
1017                         continue;
1018                 }
1019                 err = devlink_nl_sb_pool_fill(msg, devlink,
1020                                               devlink_sb,
1021                                               pool_index,
1022                                               DEVLINK_CMD_SB_POOL_NEW,
1023                                               portid, seq, NLM_F_MULTI);
1024                 if (err)
1025                         return err;
1026                 (*p_idx)++;
1027         }
1028         return 0;
1029 }
1030
1031 static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg,
1032                                              struct netlink_callback *cb)
1033 {
1034         struct devlink *devlink;
1035         struct devlink_sb *devlink_sb;
1036         int start = cb->args[0];
1037         int idx = 0;
1038         int err;
1039
1040         mutex_lock(&devlink_mutex);
1041         list_for_each_entry(devlink, &devlink_list, list) {
1042                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1043                     !devlink->ops->sb_pool_get)
1044                         continue;
1045                 mutex_lock(&devlink->lock);
1046                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1047                         err = __sb_pool_get_dumpit(msg, start, &idx, devlink,
1048                                                    devlink_sb,
1049                                                    NETLINK_CB(cb->skb).portid,
1050                                                    cb->nlh->nlmsg_seq);
1051                         if (err && err != -EOPNOTSUPP) {
1052                                 mutex_unlock(&devlink->lock);
1053                                 goto out;
1054                         }
1055                 }
1056                 mutex_unlock(&devlink->lock);
1057         }
1058 out:
1059         mutex_unlock(&devlink_mutex);
1060
1061         cb->args[0] = idx;
1062         return msg->len;
1063 }
1064
1065 static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
1066                                u16 pool_index, u32 size,
1067                                enum devlink_sb_threshold_type threshold_type,
1068                                struct netlink_ext_ack *extack)
1069
1070 {
1071         const struct devlink_ops *ops = devlink->ops;
1072
1073         if (ops->sb_pool_set)
1074                 return ops->sb_pool_set(devlink, sb_index, pool_index,
1075                                         size, threshold_type, extack);
1076         return -EOPNOTSUPP;
1077 }
1078
1079 static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb,
1080                                            struct genl_info *info)
1081 {
1082         struct devlink *devlink = info->user_ptr[0];
1083         struct devlink_sb *devlink_sb = info->user_ptr[1];
1084         enum devlink_sb_threshold_type threshold_type;
1085         u16 pool_index;
1086         u32 size;
1087         int err;
1088
1089         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1090                                                   &pool_index);
1091         if (err)
1092                 return err;
1093
1094         err = devlink_sb_th_type_get_from_info(info, &threshold_type);
1095         if (err)
1096                 return err;
1097
1098         if (!info->attrs[DEVLINK_ATTR_SB_POOL_SIZE])
1099                 return -EINVAL;
1100
1101         size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]);
1102         return devlink_sb_pool_set(devlink, devlink_sb->index,
1103                                    pool_index, size, threshold_type,
1104                                    info->extack);
1105 }
1106
1107 static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
1108                                         struct devlink *devlink,
1109                                         struct devlink_port *devlink_port,
1110                                         struct devlink_sb *devlink_sb,
1111                                         u16 pool_index,
1112                                         enum devlink_command cmd,
1113                                         u32 portid, u32 seq, int flags)
1114 {
1115         const struct devlink_ops *ops = devlink->ops;
1116         u32 threshold;
1117         void *hdr;
1118         int err;
1119
1120         err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
1121                                     pool_index, &threshold);
1122         if (err)
1123                 return err;
1124
1125         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1126         if (!hdr)
1127                 return -EMSGSIZE;
1128
1129         if (devlink_nl_put_handle(msg, devlink))
1130                 goto nla_put_failure;
1131         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1132                 goto nla_put_failure;
1133         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1134                 goto nla_put_failure;
1135         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1136                 goto nla_put_failure;
1137         if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1138                 goto nla_put_failure;
1139
1140         if (ops->sb_occ_port_pool_get) {
1141                 u32 cur;
1142                 u32 max;
1143
1144                 err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
1145                                                 pool_index, &cur, &max);
1146                 if (err && err != -EOPNOTSUPP)
1147                         return err;
1148                 if (!err) {
1149                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1150                                 goto nla_put_failure;
1151                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1152                                 goto nla_put_failure;
1153                 }
1154         }
1155
1156         genlmsg_end(msg, hdr);
1157         return 0;
1158
1159 nla_put_failure:
1160         genlmsg_cancel(msg, hdr);
1161         return -EMSGSIZE;
1162 }
1163
1164 static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
1165                                                 struct genl_info *info)
1166 {
1167         struct devlink_port *devlink_port = info->user_ptr[0];
1168         struct devlink *devlink = devlink_port->devlink;
1169         struct devlink_sb *devlink_sb = info->user_ptr[1];
1170         struct sk_buff *msg;
1171         u16 pool_index;
1172         int err;
1173
1174         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1175                                                   &pool_index);
1176         if (err)
1177                 return err;
1178
1179         if (!devlink->ops->sb_port_pool_get)
1180                 return -EOPNOTSUPP;
1181
1182         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1183         if (!msg)
1184                 return -ENOMEM;
1185
1186         err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port,
1187                                            devlink_sb, pool_index,
1188                                            DEVLINK_CMD_SB_PORT_POOL_NEW,
1189                                            info->snd_portid, info->snd_seq, 0);
1190         if (err) {
1191                 nlmsg_free(msg);
1192                 return err;
1193         }
1194
1195         return genlmsg_reply(msg, info);
1196 }
1197
1198 static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1199                                      struct devlink *devlink,
1200                                      struct devlink_sb *devlink_sb,
1201                                      u32 portid, u32 seq)
1202 {
1203         struct devlink_port *devlink_port;
1204         u16 pool_count = devlink_sb_pool_count(devlink_sb);
1205         u16 pool_index;
1206         int err;
1207
1208         list_for_each_entry(devlink_port, &devlink->port_list, list) {
1209                 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1210                         if (*p_idx < start) {
1211                                 (*p_idx)++;
1212                                 continue;
1213                         }
1214                         err = devlink_nl_sb_port_pool_fill(msg, devlink,
1215                                                            devlink_port,
1216                                                            devlink_sb,
1217                                                            pool_index,
1218                                                            DEVLINK_CMD_SB_PORT_POOL_NEW,
1219                                                            portid, seq,
1220                                                            NLM_F_MULTI);
1221                         if (err)
1222                                 return err;
1223                         (*p_idx)++;
1224                 }
1225         }
1226         return 0;
1227 }
1228
1229 static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg,
1230                                                   struct netlink_callback *cb)
1231 {
1232         struct devlink *devlink;
1233         struct devlink_sb *devlink_sb;
1234         int start = cb->args[0];
1235         int idx = 0;
1236         int err;
1237
1238         mutex_lock(&devlink_mutex);
1239         list_for_each_entry(devlink, &devlink_list, list) {
1240                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1241                     !devlink->ops->sb_port_pool_get)
1242                         continue;
1243                 mutex_lock(&devlink->lock);
1244                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1245                         err = __sb_port_pool_get_dumpit(msg, start, &idx,
1246                                                         devlink, devlink_sb,
1247                                                         NETLINK_CB(cb->skb).portid,
1248                                                         cb->nlh->nlmsg_seq);
1249                         if (err && err != -EOPNOTSUPP) {
1250                                 mutex_unlock(&devlink->lock);
1251                                 goto out;
1252                         }
1253                 }
1254                 mutex_unlock(&devlink->lock);
1255         }
1256 out:
1257         mutex_unlock(&devlink_mutex);
1258
1259         cb->args[0] = idx;
1260         return msg->len;
1261 }
1262
1263 static int devlink_sb_port_pool_set(struct devlink_port *devlink_port,
1264                                     unsigned int sb_index, u16 pool_index,
1265                                     u32 threshold,
1266                                     struct netlink_ext_ack *extack)
1267
1268 {
1269         const struct devlink_ops *ops = devlink_port->devlink->ops;
1270
1271         if (ops->sb_port_pool_set)
1272                 return ops->sb_port_pool_set(devlink_port, sb_index,
1273                                              pool_index, threshold, extack);
1274         return -EOPNOTSUPP;
1275 }
1276
1277 static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb,
1278                                                 struct genl_info *info)
1279 {
1280         struct devlink_port *devlink_port = info->user_ptr[0];
1281         struct devlink_sb *devlink_sb = info->user_ptr[1];
1282         u16 pool_index;
1283         u32 threshold;
1284         int err;
1285
1286         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1287                                                   &pool_index);
1288         if (err)
1289                 return err;
1290
1291         if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1292                 return -EINVAL;
1293
1294         threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1295         return devlink_sb_port_pool_set(devlink_port, devlink_sb->index,
1296                                         pool_index, threshold, info->extack);
1297 }
1298
1299 static int
1300 devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
1301                                 struct devlink_port *devlink_port,
1302                                 struct devlink_sb *devlink_sb, u16 tc_index,
1303                                 enum devlink_sb_pool_type pool_type,
1304                                 enum devlink_command cmd,
1305                                 u32 portid, u32 seq, int flags)
1306 {
1307         const struct devlink_ops *ops = devlink->ops;
1308         u16 pool_index;
1309         u32 threshold;
1310         void *hdr;
1311         int err;
1312
1313         err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
1314                                        tc_index, pool_type,
1315                                        &pool_index, &threshold);
1316         if (err)
1317                 return err;
1318
1319         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1320         if (!hdr)
1321                 return -EMSGSIZE;
1322
1323         if (devlink_nl_put_handle(msg, devlink))
1324                 goto nla_put_failure;
1325         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1326                 goto nla_put_failure;
1327         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1328                 goto nla_put_failure;
1329         if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index))
1330                 goto nla_put_failure;
1331         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type))
1332                 goto nla_put_failure;
1333         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1334                 goto nla_put_failure;
1335         if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1336                 goto nla_put_failure;
1337
1338         if (ops->sb_occ_tc_port_bind_get) {
1339                 u32 cur;
1340                 u32 max;
1341
1342                 err = ops->sb_occ_tc_port_bind_get(devlink_port,
1343                                                    devlink_sb->index,
1344                                                    tc_index, pool_type,
1345                                                    &cur, &max);
1346                 if (err && err != -EOPNOTSUPP)
1347                         return err;
1348                 if (!err) {
1349                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1350                                 goto nla_put_failure;
1351                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1352                                 goto nla_put_failure;
1353                 }
1354         }
1355
1356         genlmsg_end(msg, hdr);
1357         return 0;
1358
1359 nla_put_failure:
1360         genlmsg_cancel(msg, hdr);
1361         return -EMSGSIZE;
1362 }
1363
1364 static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
1365                                                    struct genl_info *info)
1366 {
1367         struct devlink_port *devlink_port = info->user_ptr[0];
1368         struct devlink *devlink = devlink_port->devlink;
1369         struct devlink_sb *devlink_sb = info->user_ptr[1];
1370         struct sk_buff *msg;
1371         enum devlink_sb_pool_type pool_type;
1372         u16 tc_index;
1373         int err;
1374
1375         err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1376         if (err)
1377                 return err;
1378
1379         err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1380                                                 pool_type, &tc_index);
1381         if (err)
1382                 return err;
1383
1384         if (!devlink->ops->sb_tc_pool_bind_get)
1385                 return -EOPNOTSUPP;
1386
1387         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1388         if (!msg)
1389                 return -ENOMEM;
1390
1391         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port,
1392                                               devlink_sb, tc_index, pool_type,
1393                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1394                                               info->snd_portid,
1395                                               info->snd_seq, 0);
1396         if (err) {
1397                 nlmsg_free(msg);
1398                 return err;
1399         }
1400
1401         return genlmsg_reply(msg, info);
1402 }
1403
1404 static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1405                                         int start, int *p_idx,
1406                                         struct devlink *devlink,
1407                                         struct devlink_sb *devlink_sb,
1408                                         u32 portid, u32 seq)
1409 {
1410         struct devlink_port *devlink_port;
1411         u16 tc_index;
1412         int err;
1413
1414         list_for_each_entry(devlink_port, &devlink->port_list, list) {
1415                 for (tc_index = 0;
1416                      tc_index < devlink_sb->ingress_tc_count; tc_index++) {
1417                         if (*p_idx < start) {
1418                                 (*p_idx)++;
1419                                 continue;
1420                         }
1421                         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1422                                                               devlink_port,
1423                                                               devlink_sb,
1424                                                               tc_index,
1425                                                               DEVLINK_SB_POOL_TYPE_INGRESS,
1426                                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1427                                                               portid, seq,
1428                                                               NLM_F_MULTI);
1429                         if (err)
1430                                 return err;
1431                         (*p_idx)++;
1432                 }
1433                 for (tc_index = 0;
1434                      tc_index < devlink_sb->egress_tc_count; tc_index++) {
1435                         if (*p_idx < start) {
1436                                 (*p_idx)++;
1437                                 continue;
1438                         }
1439                         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1440                                                               devlink_port,
1441                                                               devlink_sb,
1442                                                               tc_index,
1443                                                               DEVLINK_SB_POOL_TYPE_EGRESS,
1444                                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1445                                                               portid, seq,
1446                                                               NLM_F_MULTI);
1447                         if (err)
1448                                 return err;
1449                         (*p_idx)++;
1450                 }
1451         }
1452         return 0;
1453 }
1454
1455 static int
1456 devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1457                                           struct netlink_callback *cb)
1458 {
1459         struct devlink *devlink;
1460         struct devlink_sb *devlink_sb;
1461         int start = cb->args[0];
1462         int idx = 0;
1463         int err;
1464
1465         mutex_lock(&devlink_mutex);
1466         list_for_each_entry(devlink, &devlink_list, list) {
1467                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1468                     !devlink->ops->sb_tc_pool_bind_get)
1469                         continue;
1470
1471                 mutex_lock(&devlink->lock);
1472                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1473                         err = __sb_tc_pool_bind_get_dumpit(msg, start, &idx,
1474                                                            devlink,
1475                                                            devlink_sb,
1476                                                            NETLINK_CB(cb->skb).portid,
1477                                                            cb->nlh->nlmsg_seq);
1478                         if (err && err != -EOPNOTSUPP) {
1479                                 mutex_unlock(&devlink->lock);
1480                                 goto out;
1481                         }
1482                 }
1483                 mutex_unlock(&devlink->lock);
1484         }
1485 out:
1486         mutex_unlock(&devlink_mutex);
1487
1488         cb->args[0] = idx;
1489         return msg->len;
1490 }
1491
1492 static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
1493                                        unsigned int sb_index, u16 tc_index,
1494                                        enum devlink_sb_pool_type pool_type,
1495                                        u16 pool_index, u32 threshold,
1496                                        struct netlink_ext_ack *extack)
1497
1498 {
1499         const struct devlink_ops *ops = devlink_port->devlink->ops;
1500
1501         if (ops->sb_tc_pool_bind_set)
1502                 return ops->sb_tc_pool_bind_set(devlink_port, sb_index,
1503                                                 tc_index, pool_type,
1504                                                 pool_index, threshold, extack);
1505         return -EOPNOTSUPP;
1506 }
1507
1508 static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
1509                                                    struct genl_info *info)
1510 {
1511         struct devlink_port *devlink_port = info->user_ptr[0];
1512         struct devlink_sb *devlink_sb = info->user_ptr[1];
1513         enum devlink_sb_pool_type pool_type;
1514         u16 tc_index;
1515         u16 pool_index;
1516         u32 threshold;
1517         int err;
1518
1519         err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1520         if (err)
1521                 return err;
1522
1523         err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1524                                                 pool_type, &tc_index);
1525         if (err)
1526                 return err;
1527
1528         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1529                                                   &pool_index);
1530         if (err)
1531                 return err;
1532
1533         if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1534                 return -EINVAL;
1535
1536         threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1537         return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index,
1538                                            tc_index, pool_type,
1539                                            pool_index, threshold, info->extack);
1540 }
1541
1542 static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
1543                                                struct genl_info *info)
1544 {
1545         struct devlink *devlink = info->user_ptr[0];
1546         struct devlink_sb *devlink_sb = info->user_ptr[1];
1547         const struct devlink_ops *ops = devlink->ops;
1548
1549         if (ops->sb_occ_snapshot)
1550                 return ops->sb_occ_snapshot(devlink, devlink_sb->index);
1551         return -EOPNOTSUPP;
1552 }
1553
1554 static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
1555                                                 struct genl_info *info)
1556 {
1557         struct devlink *devlink = info->user_ptr[0];
1558         struct devlink_sb *devlink_sb = info->user_ptr[1];
1559         const struct devlink_ops *ops = devlink->ops;
1560
1561         if (ops->sb_occ_max_clear)
1562                 return ops->sb_occ_max_clear(devlink, devlink_sb->index);
1563         return -EOPNOTSUPP;
1564 }
1565
1566 static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
1567                                    enum devlink_command cmd, u32 portid,
1568                                    u32 seq, int flags)
1569 {
1570         const struct devlink_ops *ops = devlink->ops;
1571         enum devlink_eswitch_encap_mode encap_mode;
1572         u8 inline_mode;
1573         void *hdr;
1574         int err = 0;
1575         u16 mode;
1576
1577         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1578         if (!hdr)
1579                 return -EMSGSIZE;
1580
1581         err = devlink_nl_put_handle(msg, devlink);
1582         if (err)
1583                 goto nla_put_failure;
1584
1585         if (ops->eswitch_mode_get) {
1586                 err = ops->eswitch_mode_get(devlink, &mode);
1587                 if (err)
1588                         goto nla_put_failure;
1589                 err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode);
1590                 if (err)
1591                         goto nla_put_failure;
1592         }
1593
1594         if (ops->eswitch_inline_mode_get) {
1595                 err = ops->eswitch_inline_mode_get(devlink, &inline_mode);
1596                 if (err)
1597                         goto nla_put_failure;
1598                 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE,
1599                                  inline_mode);
1600                 if (err)
1601                         goto nla_put_failure;
1602         }
1603
1604         if (ops->eswitch_encap_mode_get) {
1605                 err = ops->eswitch_encap_mode_get(devlink, &encap_mode);
1606                 if (err)
1607                         goto nla_put_failure;
1608                 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_ENCAP_MODE, encap_mode);
1609                 if (err)
1610                         goto nla_put_failure;
1611         }
1612
1613         genlmsg_end(msg, hdr);
1614         return 0;
1615
1616 nla_put_failure:
1617         genlmsg_cancel(msg, hdr);
1618         return err;
1619 }
1620
1621 static int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb,
1622                                            struct genl_info *info)
1623 {
1624         struct devlink *devlink = info->user_ptr[0];
1625         struct sk_buff *msg;
1626         int err;
1627
1628         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1629         if (!msg)
1630                 return -ENOMEM;
1631
1632         err = devlink_nl_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_GET,
1633                                       info->snd_portid, info->snd_seq, 0);
1634
1635         if (err) {
1636                 nlmsg_free(msg);
1637                 return err;
1638         }
1639
1640         return genlmsg_reply(msg, info);
1641 }
1642
1643 static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb,
1644                                            struct genl_info *info)
1645 {
1646         struct devlink *devlink = info->user_ptr[0];
1647         const struct devlink_ops *ops = devlink->ops;
1648         enum devlink_eswitch_encap_mode encap_mode;
1649         u8 inline_mode;
1650         int err = 0;
1651         u16 mode;
1652
1653         if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) {
1654                 if (!ops->eswitch_mode_set)
1655                         return -EOPNOTSUPP;
1656                 mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
1657                 err = ops->eswitch_mode_set(devlink, mode, info->extack);
1658                 if (err)
1659                         return err;
1660         }
1661
1662         if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) {
1663                 if (!ops->eswitch_inline_mode_set)
1664                         return -EOPNOTSUPP;
1665                 inline_mode = nla_get_u8(
1666                                 info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]);
1667                 err = ops->eswitch_inline_mode_set(devlink, inline_mode,
1668                                                    info->extack);
1669                 if (err)
1670                         return err;
1671         }
1672
1673         if (info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]) {
1674                 if (!ops->eswitch_encap_mode_set)
1675                         return -EOPNOTSUPP;
1676                 encap_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]);
1677                 err = ops->eswitch_encap_mode_set(devlink, encap_mode,
1678                                                   info->extack);
1679                 if (err)
1680                         return err;
1681         }
1682
1683         return 0;
1684 }
1685
1686 int devlink_dpipe_match_put(struct sk_buff *skb,
1687                             struct devlink_dpipe_match *match)
1688 {
1689         struct devlink_dpipe_header *header = match->header;
1690         struct devlink_dpipe_field *field = &header->fields[match->field_id];
1691         struct nlattr *match_attr;
1692
1693         match_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_MATCH);
1694         if (!match_attr)
1695                 return -EMSGSIZE;
1696
1697         if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) ||
1698             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) ||
1699             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1700             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1701             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1702                 goto nla_put_failure;
1703
1704         nla_nest_end(skb, match_attr);
1705         return 0;
1706
1707 nla_put_failure:
1708         nla_nest_cancel(skb, match_attr);
1709         return -EMSGSIZE;
1710 }
1711 EXPORT_SYMBOL_GPL(devlink_dpipe_match_put);
1712
1713 static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table,
1714                                      struct sk_buff *skb)
1715 {
1716         struct nlattr *matches_attr;
1717
1718         matches_attr = nla_nest_start_noflag(skb,
1719                                              DEVLINK_ATTR_DPIPE_TABLE_MATCHES);
1720         if (!matches_attr)
1721                 return -EMSGSIZE;
1722
1723         if (table->table_ops->matches_dump(table->priv, skb))
1724                 goto nla_put_failure;
1725
1726         nla_nest_end(skb, matches_attr);
1727         return 0;
1728
1729 nla_put_failure:
1730         nla_nest_cancel(skb, matches_attr);
1731         return -EMSGSIZE;
1732 }
1733
1734 int devlink_dpipe_action_put(struct sk_buff *skb,
1735                              struct devlink_dpipe_action *action)
1736 {
1737         struct devlink_dpipe_header *header = action->header;
1738         struct devlink_dpipe_field *field = &header->fields[action->field_id];
1739         struct nlattr *action_attr;
1740
1741         action_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ACTION);
1742         if (!action_attr)
1743                 return -EMSGSIZE;
1744
1745         if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) ||
1746             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) ||
1747             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1748             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1749             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1750                 goto nla_put_failure;
1751
1752         nla_nest_end(skb, action_attr);
1753         return 0;
1754
1755 nla_put_failure:
1756         nla_nest_cancel(skb, action_attr);
1757         return -EMSGSIZE;
1758 }
1759 EXPORT_SYMBOL_GPL(devlink_dpipe_action_put);
1760
1761 static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table,
1762                                      struct sk_buff *skb)
1763 {
1764         struct nlattr *actions_attr;
1765
1766         actions_attr = nla_nest_start_noflag(skb,
1767                                              DEVLINK_ATTR_DPIPE_TABLE_ACTIONS);
1768         if (!actions_attr)
1769                 return -EMSGSIZE;
1770
1771         if (table->table_ops->actions_dump(table->priv, skb))
1772                 goto nla_put_failure;
1773
1774         nla_nest_end(skb, actions_attr);
1775         return 0;
1776
1777 nla_put_failure:
1778         nla_nest_cancel(skb, actions_attr);
1779         return -EMSGSIZE;
1780 }
1781
1782 static int devlink_dpipe_table_put(struct sk_buff *skb,
1783                                    struct devlink_dpipe_table *table)
1784 {
1785         struct nlattr *table_attr;
1786         u64 table_size;
1787
1788         table_size = table->table_ops->size_get(table->priv);
1789         table_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLE);
1790         if (!table_attr)
1791                 return -EMSGSIZE;
1792
1793         if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) ||
1794             nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table_size,
1795                               DEVLINK_ATTR_PAD))
1796                 goto nla_put_failure;
1797         if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED,
1798                        table->counters_enabled))
1799                 goto nla_put_failure;
1800
1801         if (table->resource_valid) {
1802                 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,
1803                                       table->resource_id, DEVLINK_ATTR_PAD) ||
1804                     nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS,
1805                                       table->resource_units, DEVLINK_ATTR_PAD))
1806                         goto nla_put_failure;
1807         }
1808         if (devlink_dpipe_matches_put(table, skb))
1809                 goto nla_put_failure;
1810
1811         if (devlink_dpipe_actions_put(table, skb))
1812                 goto nla_put_failure;
1813
1814         nla_nest_end(skb, table_attr);
1815         return 0;
1816
1817 nla_put_failure:
1818         nla_nest_cancel(skb, table_attr);
1819         return -EMSGSIZE;
1820 }
1821
1822 static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb,
1823                                             struct genl_info *info)
1824 {
1825         int err;
1826
1827         if (*pskb) {
1828                 err = genlmsg_reply(*pskb, info);
1829                 if (err)
1830                         return err;
1831         }
1832         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
1833         if (!*pskb)
1834                 return -ENOMEM;
1835         return 0;
1836 }
1837
1838 static int devlink_dpipe_tables_fill(struct genl_info *info,
1839                                      enum devlink_command cmd, int flags,
1840                                      struct list_head *dpipe_tables,
1841                                      const char *table_name)
1842 {
1843         struct devlink *devlink = info->user_ptr[0];
1844         struct devlink_dpipe_table *table;
1845         struct nlattr *tables_attr;
1846         struct sk_buff *skb = NULL;
1847         struct nlmsghdr *nlh;
1848         bool incomplete;
1849         void *hdr;
1850         int i;
1851         int err;
1852
1853         table = list_first_entry(dpipe_tables,
1854                                  struct devlink_dpipe_table, list);
1855 start_again:
1856         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1857         if (err)
1858                 return err;
1859
1860         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
1861                           &devlink_nl_family, NLM_F_MULTI, cmd);
1862         if (!hdr) {
1863                 nlmsg_free(skb);
1864                 return -EMSGSIZE;
1865         }
1866
1867         if (devlink_nl_put_handle(skb, devlink))
1868                 goto nla_put_failure;
1869         tables_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLES);
1870         if (!tables_attr)
1871                 goto nla_put_failure;
1872
1873         i = 0;
1874         incomplete = false;
1875         list_for_each_entry_from(table, dpipe_tables, list) {
1876                 if (!table_name) {
1877                         err = devlink_dpipe_table_put(skb, table);
1878                         if (err) {
1879                                 if (!i)
1880                                         goto err_table_put;
1881                                 incomplete = true;
1882                                 break;
1883                         }
1884                 } else {
1885                         if (!strcmp(table->name, table_name)) {
1886                                 err = devlink_dpipe_table_put(skb, table);
1887                                 if (err)
1888                                         break;
1889                         }
1890                 }
1891                 i++;
1892         }
1893
1894         nla_nest_end(skb, tables_attr);
1895         genlmsg_end(skb, hdr);
1896         if (incomplete)
1897                 goto start_again;
1898
1899 send_done:
1900         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
1901                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
1902         if (!nlh) {
1903                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1904                 if (err)
1905                         return err;
1906                 goto send_done;
1907         }
1908
1909         return genlmsg_reply(skb, info);
1910
1911 nla_put_failure:
1912         err = -EMSGSIZE;
1913 err_table_put:
1914         nlmsg_free(skb);
1915         return err;
1916 }
1917
1918 static int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb,
1919                                           struct genl_info *info)
1920 {
1921         struct devlink *devlink = info->user_ptr[0];
1922         const char *table_name =  NULL;
1923
1924         if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
1925                 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
1926
1927         return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0,
1928                                          &devlink->dpipe_table_list,
1929                                          table_name);
1930 }
1931
1932 static int devlink_dpipe_value_put(struct sk_buff *skb,
1933                                    struct devlink_dpipe_value *value)
1934 {
1935         if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE,
1936                     value->value_size, value->value))
1937                 return -EMSGSIZE;
1938         if (value->mask)
1939                 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK,
1940                             value->value_size, value->mask))
1941                         return -EMSGSIZE;
1942         if (value->mapping_valid)
1943                 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING,
1944                                 value->mapping_value))
1945                         return -EMSGSIZE;
1946         return 0;
1947 }
1948
1949 static int devlink_dpipe_action_value_put(struct sk_buff *skb,
1950                                           struct devlink_dpipe_value *value)
1951 {
1952         if (!value->action)
1953                 return -EINVAL;
1954         if (devlink_dpipe_action_put(skb, value->action))
1955                 return -EMSGSIZE;
1956         if (devlink_dpipe_value_put(skb, value))
1957                 return -EMSGSIZE;
1958         return 0;
1959 }
1960
1961 static int devlink_dpipe_action_values_put(struct sk_buff *skb,
1962                                            struct devlink_dpipe_value *values,
1963                                            unsigned int values_count)
1964 {
1965         struct nlattr *action_attr;
1966         int i;
1967         int err;
1968
1969         for (i = 0; i < values_count; i++) {
1970                 action_attr = nla_nest_start_noflag(skb,
1971                                                     DEVLINK_ATTR_DPIPE_ACTION_VALUE);
1972                 if (!action_attr)
1973                         return -EMSGSIZE;
1974                 err = devlink_dpipe_action_value_put(skb, &values[i]);
1975                 if (err)
1976                         goto err_action_value_put;
1977                 nla_nest_end(skb, action_attr);
1978         }
1979         return 0;
1980
1981 err_action_value_put:
1982         nla_nest_cancel(skb, action_attr);
1983         return err;
1984 }
1985
1986 static int devlink_dpipe_match_value_put(struct sk_buff *skb,
1987                                          struct devlink_dpipe_value *value)
1988 {
1989         if (!value->match)
1990                 return -EINVAL;
1991         if (devlink_dpipe_match_put(skb, value->match))
1992                 return -EMSGSIZE;
1993         if (devlink_dpipe_value_put(skb, value))
1994                 return -EMSGSIZE;
1995         return 0;
1996 }
1997
1998 static int devlink_dpipe_match_values_put(struct sk_buff *skb,
1999                                           struct devlink_dpipe_value *values,
2000                                           unsigned int values_count)
2001 {
2002         struct nlattr *match_attr;
2003         int i;
2004         int err;
2005
2006         for (i = 0; i < values_count; i++) {
2007                 match_attr = nla_nest_start_noflag(skb,
2008                                                    DEVLINK_ATTR_DPIPE_MATCH_VALUE);
2009                 if (!match_attr)
2010                         return -EMSGSIZE;
2011                 err = devlink_dpipe_match_value_put(skb, &values[i]);
2012                 if (err)
2013                         goto err_match_value_put;
2014                 nla_nest_end(skb, match_attr);
2015         }
2016         return 0;
2017
2018 err_match_value_put:
2019         nla_nest_cancel(skb, match_attr);
2020         return err;
2021 }
2022
2023 static int devlink_dpipe_entry_put(struct sk_buff *skb,
2024                                    struct devlink_dpipe_entry *entry)
2025 {
2026         struct nlattr *entry_attr, *matches_attr, *actions_attr;
2027         int err;
2028
2029         entry_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ENTRY);
2030         if (!entry_attr)
2031                 return  -EMSGSIZE;
2032
2033         if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index,
2034                               DEVLINK_ATTR_PAD))
2035                 goto nla_put_failure;
2036         if (entry->counter_valid)
2037                 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER,
2038                                       entry->counter, DEVLINK_ATTR_PAD))
2039                         goto nla_put_failure;
2040
2041         matches_attr = nla_nest_start_noflag(skb,
2042                                              DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES);
2043         if (!matches_attr)
2044                 goto nla_put_failure;
2045
2046         err = devlink_dpipe_match_values_put(skb, entry->match_values,
2047                                              entry->match_values_count);
2048         if (err) {
2049                 nla_nest_cancel(skb, matches_attr);
2050                 goto err_match_values_put;
2051         }
2052         nla_nest_end(skb, matches_attr);
2053
2054         actions_attr = nla_nest_start_noflag(skb,
2055                                              DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES);
2056         if (!actions_attr)
2057                 goto nla_put_failure;
2058
2059         err = devlink_dpipe_action_values_put(skb, entry->action_values,
2060                                               entry->action_values_count);
2061         if (err) {
2062                 nla_nest_cancel(skb, actions_attr);
2063                 goto err_action_values_put;
2064         }
2065         nla_nest_end(skb, actions_attr);
2066
2067         nla_nest_end(skb, entry_attr);
2068         return 0;
2069
2070 nla_put_failure:
2071         err = -EMSGSIZE;
2072 err_match_values_put:
2073 err_action_values_put:
2074         nla_nest_cancel(skb, entry_attr);
2075         return err;
2076 }
2077
2078 static struct devlink_dpipe_table *
2079 devlink_dpipe_table_find(struct list_head *dpipe_tables,
2080                          const char *table_name)
2081 {
2082         struct devlink_dpipe_table *table;
2083
2084         list_for_each_entry_rcu(table, dpipe_tables, list) {
2085                 if (!strcmp(table->name, table_name))
2086                         return table;
2087         }
2088         return NULL;
2089 }
2090
2091 int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
2092 {
2093         struct devlink *devlink;
2094         int err;
2095
2096         err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb,
2097                                                dump_ctx->info);
2098         if (err)
2099                 return err;
2100
2101         dump_ctx->hdr = genlmsg_put(dump_ctx->skb,
2102                                     dump_ctx->info->snd_portid,
2103                                     dump_ctx->info->snd_seq,
2104                                     &devlink_nl_family, NLM_F_MULTI,
2105                                     dump_ctx->cmd);
2106         if (!dump_ctx->hdr)
2107                 goto nla_put_failure;
2108
2109         devlink = dump_ctx->info->user_ptr[0];
2110         if (devlink_nl_put_handle(dump_ctx->skb, devlink))
2111                 goto nla_put_failure;
2112         dump_ctx->nest = nla_nest_start_noflag(dump_ctx->skb,
2113                                                DEVLINK_ATTR_DPIPE_ENTRIES);
2114         if (!dump_ctx->nest)
2115                 goto nla_put_failure;
2116         return 0;
2117
2118 nla_put_failure:
2119         nlmsg_free(dump_ctx->skb);
2120         return -EMSGSIZE;
2121 }
2122 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare);
2123
2124 int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
2125                                    struct devlink_dpipe_entry *entry)
2126 {
2127         return devlink_dpipe_entry_put(dump_ctx->skb, entry);
2128 }
2129 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append);
2130
2131 int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
2132 {
2133         nla_nest_end(dump_ctx->skb, dump_ctx->nest);
2134         genlmsg_end(dump_ctx->skb, dump_ctx->hdr);
2135         return 0;
2136 }
2137 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close);
2138
2139 void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry)
2140
2141 {
2142         unsigned int value_count, value_index;
2143         struct devlink_dpipe_value *value;
2144
2145         value = entry->action_values;
2146         value_count = entry->action_values_count;
2147         for (value_index = 0; value_index < value_count; value_index++) {
2148                 kfree(value[value_index].value);
2149                 kfree(value[value_index].mask);
2150         }
2151
2152         value = entry->match_values;
2153         value_count = entry->match_values_count;
2154         for (value_index = 0; value_index < value_count; value_index++) {
2155                 kfree(value[value_index].value);
2156                 kfree(value[value_index].mask);
2157         }
2158 }
2159 EXPORT_SYMBOL(devlink_dpipe_entry_clear);
2160
2161 static int devlink_dpipe_entries_fill(struct genl_info *info,
2162                                       enum devlink_command cmd, int flags,
2163                                       struct devlink_dpipe_table *table)
2164 {
2165         struct devlink_dpipe_dump_ctx dump_ctx;
2166         struct nlmsghdr *nlh;
2167         int err;
2168
2169         dump_ctx.skb = NULL;
2170         dump_ctx.cmd = cmd;
2171         dump_ctx.info = info;
2172
2173         err = table->table_ops->entries_dump(table->priv,
2174                                              table->counters_enabled,
2175                                              &dump_ctx);
2176         if (err)
2177                 return err;
2178
2179 send_done:
2180         nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq,
2181                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2182         if (!nlh) {
2183                 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info);
2184                 if (err)
2185                         return err;
2186                 goto send_done;
2187         }
2188         return genlmsg_reply(dump_ctx.skb, info);
2189 }
2190
2191 static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
2192                                             struct genl_info *info)
2193 {
2194         struct devlink *devlink = info->user_ptr[0];
2195         struct devlink_dpipe_table *table;
2196         const char *table_name;
2197
2198         if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
2199                 return -EINVAL;
2200
2201         table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2202         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2203                                          table_name);
2204         if (!table)
2205                 return -EINVAL;
2206
2207         if (!table->table_ops->entries_dump)
2208                 return -EINVAL;
2209
2210         return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET,
2211                                           0, table);
2212 }
2213
2214 static int devlink_dpipe_fields_put(struct sk_buff *skb,
2215                                     const struct devlink_dpipe_header *header)
2216 {
2217         struct devlink_dpipe_field *field;
2218         struct nlattr *field_attr;
2219         int i;
2220
2221         for (i = 0; i < header->fields_count; i++) {
2222                 field = &header->fields[i];
2223                 field_attr = nla_nest_start_noflag(skb,
2224                                                    DEVLINK_ATTR_DPIPE_FIELD);
2225                 if (!field_attr)
2226                         return -EMSGSIZE;
2227                 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) ||
2228                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2229                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) ||
2230                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type))
2231                         goto nla_put_failure;
2232                 nla_nest_end(skb, field_attr);
2233         }
2234         return 0;
2235
2236 nla_put_failure:
2237         nla_nest_cancel(skb, field_attr);
2238         return -EMSGSIZE;
2239 }
2240
2241 static int devlink_dpipe_header_put(struct sk_buff *skb,
2242                                     struct devlink_dpipe_header *header)
2243 {
2244         struct nlattr *fields_attr, *header_attr;
2245         int err;
2246
2247         header_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADER);
2248         if (!header_attr)
2249                 return -EMSGSIZE;
2250
2251         if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) ||
2252             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2253             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2254                 goto nla_put_failure;
2255
2256         fields_attr = nla_nest_start_noflag(skb,
2257                                             DEVLINK_ATTR_DPIPE_HEADER_FIELDS);
2258         if (!fields_attr)
2259                 goto nla_put_failure;
2260
2261         err = devlink_dpipe_fields_put(skb, header);
2262         if (err) {
2263                 nla_nest_cancel(skb, fields_attr);
2264                 goto nla_put_failure;
2265         }
2266         nla_nest_end(skb, fields_attr);
2267         nla_nest_end(skb, header_attr);
2268         return 0;
2269
2270 nla_put_failure:
2271         err = -EMSGSIZE;
2272         nla_nest_cancel(skb, header_attr);
2273         return err;
2274 }
2275
2276 static int devlink_dpipe_headers_fill(struct genl_info *info,
2277                                       enum devlink_command cmd, int flags,
2278                                       struct devlink_dpipe_headers *
2279                                       dpipe_headers)
2280 {
2281         struct devlink *devlink = info->user_ptr[0];
2282         struct nlattr *headers_attr;
2283         struct sk_buff *skb = NULL;
2284         struct nlmsghdr *nlh;
2285         void *hdr;
2286         int i, j;
2287         int err;
2288
2289         i = 0;
2290 start_again:
2291         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2292         if (err)
2293                 return err;
2294
2295         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2296                           &devlink_nl_family, NLM_F_MULTI, cmd);
2297         if (!hdr) {
2298                 nlmsg_free(skb);
2299                 return -EMSGSIZE;
2300         }
2301
2302         if (devlink_nl_put_handle(skb, devlink))
2303                 goto nla_put_failure;
2304         headers_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADERS);
2305         if (!headers_attr)
2306                 goto nla_put_failure;
2307
2308         j = 0;
2309         for (; i < dpipe_headers->headers_count; i++) {
2310                 err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]);
2311                 if (err) {
2312                         if (!j)
2313                                 goto err_table_put;
2314                         break;
2315                 }
2316                 j++;
2317         }
2318         nla_nest_end(skb, headers_attr);
2319         genlmsg_end(skb, hdr);
2320         if (i != dpipe_headers->headers_count)
2321                 goto start_again;
2322
2323 send_done:
2324         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2325                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2326         if (!nlh) {
2327                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2328                 if (err)
2329                         return err;
2330                 goto send_done;
2331         }
2332         return genlmsg_reply(skb, info);
2333
2334 nla_put_failure:
2335         err = -EMSGSIZE;
2336 err_table_put:
2337         nlmsg_free(skb);
2338         return err;
2339 }
2340
2341 static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
2342                                             struct genl_info *info)
2343 {
2344         struct devlink *devlink = info->user_ptr[0];
2345
2346         if (!devlink->dpipe_headers)
2347                 return -EOPNOTSUPP;
2348         return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET,
2349                                           0, devlink->dpipe_headers);
2350 }
2351
2352 static int devlink_dpipe_table_counters_set(struct devlink *devlink,
2353                                             const char *table_name,
2354                                             bool enable)
2355 {
2356         struct devlink_dpipe_table *table;
2357
2358         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2359                                          table_name);
2360         if (!table)
2361                 return -EINVAL;
2362
2363         if (table->counter_control_extern)
2364                 return -EOPNOTSUPP;
2365
2366         if (!(table->counters_enabled ^ enable))
2367                 return 0;
2368
2369         table->counters_enabled = enable;
2370         if (table->table_ops->counters_set_update)
2371                 table->table_ops->counters_set_update(table->priv, enable);
2372         return 0;
2373 }
2374
2375 static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
2376                                                    struct genl_info *info)
2377 {
2378         struct devlink *devlink = info->user_ptr[0];
2379         const char *table_name;
2380         bool counters_enable;
2381
2382         if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] ||
2383             !info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED])
2384                 return -EINVAL;
2385
2386         table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2387         counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
2388
2389         return devlink_dpipe_table_counters_set(devlink, table_name,
2390                                                 counters_enable);
2391 }
2392
2393 static struct devlink_resource *
2394 devlink_resource_find(struct devlink *devlink,
2395                       struct devlink_resource *resource, u64 resource_id)
2396 {
2397         struct list_head *resource_list;
2398
2399         if (resource)
2400                 resource_list = &resource->resource_list;
2401         else
2402                 resource_list = &devlink->resource_list;
2403
2404         list_for_each_entry(resource, resource_list, list) {
2405                 struct devlink_resource *child_resource;
2406
2407                 if (resource->id == resource_id)
2408                         return resource;
2409
2410                 child_resource = devlink_resource_find(devlink, resource,
2411                                                        resource_id);
2412                 if (child_resource)
2413                         return child_resource;
2414         }
2415         return NULL;
2416 }
2417
2418 static void
2419 devlink_resource_validate_children(struct devlink_resource *resource)
2420 {
2421         struct devlink_resource *child_resource;
2422         bool size_valid = true;
2423         u64 parts_size = 0;
2424
2425         if (list_empty(&resource->resource_list))
2426                 goto out;
2427
2428         list_for_each_entry(child_resource, &resource->resource_list, list)
2429                 parts_size += child_resource->size_new;
2430
2431         if (parts_size > resource->size_new)
2432                 size_valid = false;
2433 out:
2434         resource->size_valid = size_valid;
2435 }
2436
2437 static int
2438 devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
2439                                struct netlink_ext_ack *extack)
2440 {
2441         u64 reminder;
2442         int err = 0;
2443
2444         if (size > resource->size_params.size_max) {
2445                 NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum");
2446                 err = -EINVAL;
2447         }
2448
2449         if (size < resource->size_params.size_min) {
2450                 NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum");
2451                 err = -EINVAL;
2452         }
2453
2454         div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
2455         if (reminder) {
2456                 NL_SET_ERR_MSG_MOD(extack, "Wrong granularity");
2457                 err = -EINVAL;
2458         }
2459
2460         return err;
2461 }
2462
2463 static int devlink_nl_cmd_resource_set(struct sk_buff *skb,
2464                                        struct genl_info *info)
2465 {
2466         struct devlink *devlink = info->user_ptr[0];
2467         struct devlink_resource *resource;
2468         u64 resource_id;
2469         u64 size;
2470         int err;
2471
2472         if (!info->attrs[DEVLINK_ATTR_RESOURCE_ID] ||
2473             !info->attrs[DEVLINK_ATTR_RESOURCE_SIZE])
2474                 return -EINVAL;
2475         resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);
2476
2477         resource = devlink_resource_find(devlink, NULL, resource_id);
2478         if (!resource)
2479                 return -EINVAL;
2480
2481         size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);
2482         err = devlink_resource_validate_size(resource, size, info->extack);
2483         if (err)
2484                 return err;
2485
2486         resource->size_new = size;
2487         devlink_resource_validate_children(resource);
2488         if (resource->parent)
2489                 devlink_resource_validate_children(resource->parent);
2490         return 0;
2491 }
2492
2493 static int
2494 devlink_resource_size_params_put(struct devlink_resource *resource,
2495                                  struct sk_buff *skb)
2496 {
2497         struct devlink_resource_size_params *size_params;
2498
2499         size_params = &resource->size_params;
2500         if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN,
2501                               size_params->size_granularity, DEVLINK_ATTR_PAD) ||
2502             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX,
2503                               size_params->size_max, DEVLINK_ATTR_PAD) ||
2504             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN,
2505                               size_params->size_min, DEVLINK_ATTR_PAD) ||
2506             nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))
2507                 return -EMSGSIZE;
2508         return 0;
2509 }
2510
2511 static int devlink_resource_occ_put(struct devlink_resource *resource,
2512                                     struct sk_buff *skb)
2513 {
2514         if (!resource->occ_get)
2515                 return 0;
2516         return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC,
2517                                  resource->occ_get(resource->occ_get_priv),
2518                                  DEVLINK_ATTR_PAD);
2519 }
2520
2521 static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
2522                                 struct devlink_resource *resource)
2523 {
2524         struct devlink_resource *child_resource;
2525         struct nlattr *child_resource_attr;
2526         struct nlattr *resource_attr;
2527
2528         resource_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE);
2529         if (!resource_attr)
2530                 return -EMSGSIZE;
2531
2532         if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
2533             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,
2534                               DEVLINK_ATTR_PAD) ||
2535             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,
2536                               DEVLINK_ATTR_PAD))
2537                 goto nla_put_failure;
2538         if (resource->size != resource->size_new)
2539                 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW,
2540                                   resource->size_new, DEVLINK_ATTR_PAD);
2541         if (devlink_resource_occ_put(resource, skb))
2542                 goto nla_put_failure;
2543         if (devlink_resource_size_params_put(resource, skb))
2544                 goto nla_put_failure;
2545         if (list_empty(&resource->resource_list))
2546                 goto out;
2547
2548         if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID,
2549                        resource->size_valid))
2550                 goto nla_put_failure;
2551
2552         child_resource_attr = nla_nest_start_noflag(skb,
2553                                                     DEVLINK_ATTR_RESOURCE_LIST);
2554         if (!child_resource_attr)
2555                 goto nla_put_failure;
2556
2557         list_for_each_entry(child_resource, &resource->resource_list, list) {
2558                 if (devlink_resource_put(devlink, skb, child_resource))
2559                         goto resource_put_failure;
2560         }
2561
2562         nla_nest_end(skb, child_resource_attr);
2563 out:
2564         nla_nest_end(skb, resource_attr);
2565         return 0;
2566
2567 resource_put_failure:
2568         nla_nest_cancel(skb, child_resource_attr);
2569 nla_put_failure:
2570         nla_nest_cancel(skb, resource_attr);
2571         return -EMSGSIZE;
2572 }
2573
2574 static int devlink_resource_fill(struct genl_info *info,
2575                                  enum devlink_command cmd, int flags)
2576 {
2577         struct devlink *devlink = info->user_ptr[0];
2578         struct devlink_resource *resource;
2579         struct nlattr *resources_attr;
2580         struct sk_buff *skb = NULL;
2581         struct nlmsghdr *nlh;
2582         bool incomplete;
2583         void *hdr;
2584         int i;
2585         int err;
2586
2587         resource = list_first_entry(&devlink->resource_list,
2588                                     struct devlink_resource, list);
2589 start_again:
2590         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2591         if (err)
2592                 return err;
2593
2594         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2595                           &devlink_nl_family, NLM_F_MULTI, cmd);
2596         if (!hdr) {
2597                 nlmsg_free(skb);
2598                 return -EMSGSIZE;
2599         }
2600
2601         if (devlink_nl_put_handle(skb, devlink))
2602                 goto nla_put_failure;
2603
2604         resources_attr = nla_nest_start_noflag(skb,
2605                                                DEVLINK_ATTR_RESOURCE_LIST);
2606         if (!resources_attr)
2607                 goto nla_put_failure;
2608
2609         incomplete = false;
2610         i = 0;
2611         list_for_each_entry_from(resource, &devlink->resource_list, list) {
2612                 err = devlink_resource_put(devlink, skb, resource);
2613                 if (err) {
2614                         if (!i)
2615                                 goto err_resource_put;
2616                         incomplete = true;
2617                         break;
2618                 }
2619                 i++;
2620         }
2621         nla_nest_end(skb, resources_attr);
2622         genlmsg_end(skb, hdr);
2623         if (incomplete)
2624                 goto start_again;
2625 send_done:
2626         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2627                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2628         if (!nlh) {
2629                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2630                 if (err)
2631                         return err;
2632                 goto send_done;
2633         }
2634         return genlmsg_reply(skb, info);
2635
2636 nla_put_failure:
2637         err = -EMSGSIZE;
2638 err_resource_put:
2639         nlmsg_free(skb);
2640         return err;
2641 }
2642
2643 static int devlink_nl_cmd_resource_dump(struct sk_buff *skb,
2644                                         struct genl_info *info)
2645 {
2646         struct devlink *devlink = info->user_ptr[0];
2647
2648         if (list_empty(&devlink->resource_list))
2649                 return -EOPNOTSUPP;
2650
2651         return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
2652 }
2653
2654 static int
2655 devlink_resources_validate(struct devlink *devlink,
2656                            struct devlink_resource *resource,
2657                            struct genl_info *info)
2658 {
2659         struct list_head *resource_list;
2660         int err = 0;
2661
2662         if (resource)
2663                 resource_list = &resource->resource_list;
2664         else
2665                 resource_list = &devlink->resource_list;
2666
2667         list_for_each_entry(resource, resource_list, list) {
2668                 if (!resource->size_valid)
2669                         return -EINVAL;
2670                 err = devlink_resources_validate(devlink, resource, info);
2671                 if (err)
2672                         return err;
2673         }
2674         return err;
2675 }
2676
2677 static bool devlink_reload_supported(struct devlink *devlink)
2678 {
2679         return devlink->ops->reload_down && devlink->ops->reload_up;
2680 }
2681
2682 static void devlink_reload_failed_set(struct devlink *devlink,
2683                                       bool reload_failed)
2684 {
2685         if (devlink->reload_failed == reload_failed)
2686                 return;
2687         devlink->reload_failed = reload_failed;
2688         devlink_notify(devlink, DEVLINK_CMD_NEW);
2689 }
2690
2691 bool devlink_is_reload_failed(const struct devlink *devlink)
2692 {
2693         return devlink->reload_failed;
2694 }
2695 EXPORT_SYMBOL_GPL(devlink_is_reload_failed);
2696
2697 static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
2698 {
2699         struct devlink *devlink = info->user_ptr[0];
2700         int err;
2701
2702         if (!devlink_reload_supported(devlink))
2703                 return -EOPNOTSUPP;
2704
2705         err = devlink_resources_validate(devlink, NULL, info);
2706         if (err) {
2707                 NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed");
2708                 return err;
2709         }
2710         err = devlink->ops->reload_down(devlink, info->extack);
2711         if (err)
2712                 return err;
2713         err = devlink->ops->reload_up(devlink, info->extack);
2714         devlink_reload_failed_set(devlink, !!err);
2715         return err;
2716 }
2717
2718 static int devlink_nl_flash_update_fill(struct sk_buff *msg,
2719                                         struct devlink *devlink,
2720                                         enum devlink_command cmd,
2721                                         const char *status_msg,
2722                                         const char *component,
2723                                         unsigned long done, unsigned long total)
2724 {
2725         void *hdr;
2726
2727         hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
2728         if (!hdr)
2729                 return -EMSGSIZE;
2730
2731         if (devlink_nl_put_handle(msg, devlink))
2732                 goto nla_put_failure;
2733
2734         if (cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS)
2735                 goto out;
2736
2737         if (status_msg &&
2738             nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_MSG,
2739                            status_msg))
2740                 goto nla_put_failure;
2741         if (component &&
2742             nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_COMPONENT,
2743                            component))
2744                 goto nla_put_failure;
2745         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE,
2746                               done, DEVLINK_ATTR_PAD))
2747                 goto nla_put_failure;
2748         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL,
2749                               total, DEVLINK_ATTR_PAD))
2750                 goto nla_put_failure;
2751
2752 out:
2753         genlmsg_end(msg, hdr);
2754         return 0;
2755
2756 nla_put_failure:
2757         genlmsg_cancel(msg, hdr);
2758         return -EMSGSIZE;
2759 }
2760
2761 static void __devlink_flash_update_notify(struct devlink *devlink,
2762                                           enum devlink_command cmd,
2763                                           const char *status_msg,
2764                                           const char *component,
2765                                           unsigned long done,
2766                                           unsigned long total)
2767 {
2768         struct sk_buff *msg;
2769         int err;
2770
2771         WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE &&
2772                 cmd != DEVLINK_CMD_FLASH_UPDATE_END &&
2773                 cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS);
2774
2775         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2776         if (!msg)
2777                 return;
2778
2779         err = devlink_nl_flash_update_fill(msg, devlink, cmd, status_msg,
2780                                            component, done, total);
2781         if (err)
2782                 goto out_free_msg;
2783
2784         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
2785                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
2786         return;
2787
2788 out_free_msg:
2789         nlmsg_free(msg);
2790 }
2791
2792 void devlink_flash_update_begin_notify(struct devlink *devlink)
2793 {
2794         __devlink_flash_update_notify(devlink,
2795                                       DEVLINK_CMD_FLASH_UPDATE,
2796                                       NULL, NULL, 0, 0);
2797 }
2798 EXPORT_SYMBOL_GPL(devlink_flash_update_begin_notify);
2799
2800 void devlink_flash_update_end_notify(struct devlink *devlink)
2801 {
2802         __devlink_flash_update_notify(devlink,
2803                                       DEVLINK_CMD_FLASH_UPDATE_END,
2804                                       NULL, NULL, 0, 0);
2805 }
2806 EXPORT_SYMBOL_GPL(devlink_flash_update_end_notify);
2807
2808 void devlink_flash_update_status_notify(struct devlink *devlink,
2809                                         const char *status_msg,
2810                                         const char *component,
2811                                         unsigned long done,
2812                                         unsigned long total)
2813 {
2814         __devlink_flash_update_notify(devlink,
2815                                       DEVLINK_CMD_FLASH_UPDATE_STATUS,
2816                                       status_msg, component, done, total);
2817 }
2818 EXPORT_SYMBOL_GPL(devlink_flash_update_status_notify);
2819
2820 static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
2821                                        struct genl_info *info)
2822 {
2823         struct devlink *devlink = info->user_ptr[0];
2824         const char *file_name, *component;
2825         struct nlattr *nla_component;
2826
2827         if (!devlink->ops->flash_update)
2828                 return -EOPNOTSUPP;
2829
2830         if (!info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME])
2831                 return -EINVAL;
2832         file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]);
2833
2834         nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT];
2835         component = nla_component ? nla_data(nla_component) : NULL;
2836
2837         return devlink->ops->flash_update(devlink, file_name, component,
2838                                           info->extack);
2839 }
2840
2841 static const struct devlink_param devlink_param_generic[] = {
2842         {
2843                 .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
2844                 .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME,
2845                 .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE,
2846         },
2847         {
2848                 .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
2849                 .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME,
2850                 .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE,
2851         },
2852         {
2853                 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
2854                 .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME,
2855                 .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE,
2856         },
2857         {
2858                 .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
2859                 .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
2860                 .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
2861         },
2862         {
2863                 .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
2864                 .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME,
2865                 .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE,
2866         },
2867         {
2868                 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
2869                 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME,
2870                 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE,
2871         },
2872         {
2873                 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
2874                 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME,
2875                 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE,
2876         },
2877         {
2878                 .id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
2879                 .name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME,
2880                 .type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE,
2881         },
2882         {
2883                 .id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE,
2884                 .name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME,
2885                 .type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE,
2886         },
2887 };
2888
2889 static int devlink_param_generic_verify(const struct devlink_param *param)
2890 {
2891         /* verify it match generic parameter by id and name */
2892         if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
2893                 return -EINVAL;
2894         if (strcmp(param->name, devlink_param_generic[param->id].name))
2895                 return -ENOENT;
2896
2897         WARN_ON(param->type != devlink_param_generic[param->id].type);
2898
2899         return 0;
2900 }
2901
2902 static int devlink_param_driver_verify(const struct devlink_param *param)
2903 {
2904         int i;
2905
2906         if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
2907                 return -EINVAL;
2908         /* verify no such name in generic params */
2909         for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
2910                 if (!strcmp(param->name, devlink_param_generic[i].name))
2911                         return -EEXIST;
2912
2913         return 0;
2914 }
2915
2916 static struct devlink_param_item *
2917 devlink_param_find_by_name(struct list_head *param_list,
2918                            const char *param_name)
2919 {
2920         struct devlink_param_item *param_item;
2921
2922         list_for_each_entry(param_item, param_list, list)
2923                 if (!strcmp(param_item->param->name, param_name))
2924                         return param_item;
2925         return NULL;
2926 }
2927
2928 static struct devlink_param_item *
2929 devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
2930 {
2931         struct devlink_param_item *param_item;
2932
2933         list_for_each_entry(param_item, param_list, list)
2934                 if (param_item->param->id == param_id)
2935                         return param_item;
2936         return NULL;
2937 }
2938
2939 static bool
2940 devlink_param_cmode_is_supported(const struct devlink_param *param,
2941                                  enum devlink_param_cmode cmode)
2942 {
2943         return test_bit(cmode, &param->supported_cmodes);
2944 }
2945
2946 static int devlink_param_get(struct devlink *devlink,
2947                              const struct devlink_param *param,
2948                              struct devlink_param_gset_ctx *ctx)
2949 {
2950         if (!param->get)
2951                 return -EOPNOTSUPP;
2952         return param->get(devlink, param->id, ctx);
2953 }
2954
2955 static int devlink_param_set(struct devlink *devlink,
2956                              const struct devlink_param *param,
2957                              struct devlink_param_gset_ctx *ctx)
2958 {
2959         if (!param->set)
2960                 return -EOPNOTSUPP;
2961         return param->set(devlink, param->id, ctx);
2962 }
2963
2964 static int
2965 devlink_param_type_to_nla_type(enum devlink_param_type param_type)
2966 {
2967         switch (param_type) {
2968         case DEVLINK_PARAM_TYPE_U8:
2969                 return NLA_U8;
2970         case DEVLINK_PARAM_TYPE_U16:
2971                 return NLA_U16;
2972         case DEVLINK_PARAM_TYPE_U32:
2973                 return NLA_U32;
2974         case DEVLINK_PARAM_TYPE_STRING:
2975                 return NLA_STRING;
2976         case DEVLINK_PARAM_TYPE_BOOL:
2977                 return NLA_FLAG;
2978         default:
2979                 return -EINVAL;
2980         }
2981 }
2982
2983 static int
2984 devlink_nl_param_value_fill_one(struct sk_buff *msg,
2985                                 enum devlink_param_type type,
2986                                 enum devlink_param_cmode cmode,
2987                                 union devlink_param_value val)
2988 {
2989         struct nlattr *param_value_attr;
2990
2991         param_value_attr = nla_nest_start_noflag(msg,
2992                                                  DEVLINK_ATTR_PARAM_VALUE);
2993         if (!param_value_attr)
2994                 goto nla_put_failure;
2995
2996         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
2997                 goto value_nest_cancel;
2998
2999         switch (type) {
3000         case DEVLINK_PARAM_TYPE_U8:
3001                 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
3002                         goto value_nest_cancel;
3003                 break;
3004         case DEVLINK_PARAM_TYPE_U16:
3005                 if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
3006                         goto value_nest_cancel;
3007                 break;
3008         case DEVLINK_PARAM_TYPE_U32:
3009                 if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
3010                         goto value_nest_cancel;
3011                 break;
3012         case DEVLINK_PARAM_TYPE_STRING:
3013                 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
3014                                    val.vstr))
3015                         goto value_nest_cancel;
3016                 break;
3017         case DEVLINK_PARAM_TYPE_BOOL:
3018                 if (val.vbool &&
3019                     nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
3020                         goto value_nest_cancel;
3021                 break;
3022         }
3023
3024         nla_nest_end(msg, param_value_attr);
3025         return 0;
3026
3027 value_nest_cancel:
3028         nla_nest_cancel(msg, param_value_attr);
3029 nla_put_failure:
3030         return -EMSGSIZE;
3031 }
3032
3033 static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
3034                                  unsigned int port_index,
3035                                  struct devlink_param_item *param_item,
3036                                  enum devlink_command cmd,
3037                                  u32 portid, u32 seq, int flags)
3038 {
3039         union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
3040         bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {};
3041         const struct devlink_param *param = param_item->param;
3042         struct devlink_param_gset_ctx ctx;
3043         struct nlattr *param_values_list;
3044         struct nlattr *param_attr;
3045         int nla_type;
3046         void *hdr;
3047         int err;
3048         int i;
3049
3050         /* Get value from driver part to driverinit configuration mode */
3051         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3052                 if (!devlink_param_cmode_is_supported(param, i))
3053                         continue;
3054                 if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3055                         if (!param_item->driverinit_value_valid)
3056                                 return -EOPNOTSUPP;
3057                         param_value[i] = param_item->driverinit_value;
3058                 } else {
3059                         if (!param_item->published)
3060                                 continue;
3061                         ctx.cmode = i;
3062                         err = devlink_param_get(devlink, param, &ctx);
3063                         if (err)
3064                                 return err;
3065                         param_value[i] = ctx.val;
3066                 }
3067                 param_value_set[i] = true;
3068         }
3069
3070         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3071         if (!hdr)
3072                 return -EMSGSIZE;
3073
3074         if (devlink_nl_put_handle(msg, devlink))
3075                 goto genlmsg_cancel;
3076
3077         if (cmd == DEVLINK_CMD_PORT_PARAM_GET ||
3078             cmd == DEVLINK_CMD_PORT_PARAM_NEW ||
3079             cmd == DEVLINK_CMD_PORT_PARAM_DEL)
3080                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index))
3081                         goto genlmsg_cancel;
3082
3083         param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM);
3084         if (!param_attr)
3085                 goto genlmsg_cancel;
3086         if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
3087                 goto param_nest_cancel;
3088         if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
3089                 goto param_nest_cancel;
3090
3091         nla_type = devlink_param_type_to_nla_type(param->type);
3092         if (nla_type < 0)
3093                 goto param_nest_cancel;
3094         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
3095                 goto param_nest_cancel;
3096
3097         param_values_list = nla_nest_start_noflag(msg,
3098                                                   DEVLINK_ATTR_PARAM_VALUES_LIST);
3099         if (!param_values_list)
3100                 goto param_nest_cancel;
3101
3102         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3103                 if (!param_value_set[i])
3104                         continue;
3105                 err = devlink_nl_param_value_fill_one(msg, param->type,
3106                                                       i, param_value[i]);
3107                 if (err)
3108                         goto values_list_nest_cancel;
3109         }
3110
3111         nla_nest_end(msg, param_values_list);
3112         nla_nest_end(msg, param_attr);
3113         genlmsg_end(msg, hdr);
3114         return 0;
3115
3116 values_list_nest_cancel:
3117         nla_nest_end(msg, param_values_list);
3118 param_nest_cancel:
3119         nla_nest_cancel(msg, param_attr);
3120 genlmsg_cancel:
3121         genlmsg_cancel(msg, hdr);
3122         return -EMSGSIZE;
3123 }
3124
3125 static void devlink_param_notify(struct devlink *devlink,
3126                                  unsigned int port_index,
3127                                  struct devlink_param_item *param_item,
3128                                  enum devlink_command cmd)
3129 {
3130         struct sk_buff *msg;
3131         int err;
3132
3133         WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL &&
3134                 cmd != DEVLINK_CMD_PORT_PARAM_NEW &&
3135                 cmd != DEVLINK_CMD_PORT_PARAM_DEL);
3136
3137         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3138         if (!msg)
3139                 return;
3140         err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd,
3141                                     0, 0, 0);
3142         if (err) {
3143                 nlmsg_free(msg);
3144                 return;
3145         }
3146
3147         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3148                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3149 }
3150
3151 static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
3152                                            struct netlink_callback *cb)
3153 {
3154         struct devlink_param_item *param_item;
3155         struct devlink *devlink;
3156         int start = cb->args[0];
3157         int idx = 0;
3158         int err;
3159
3160         mutex_lock(&devlink_mutex);
3161         list_for_each_entry(devlink, &devlink_list, list) {
3162                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3163                         continue;
3164                 mutex_lock(&devlink->lock);
3165                 list_for_each_entry(param_item, &devlink->param_list, list) {
3166                         if (idx < start) {
3167                                 idx++;
3168                                 continue;
3169                         }
3170                         err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3171                                                     DEVLINK_CMD_PARAM_GET,
3172                                                     NETLINK_CB(cb->skb).portid,
3173                                                     cb->nlh->nlmsg_seq,
3174                                                     NLM_F_MULTI);
3175                         if (err && err != -EOPNOTSUPP) {
3176                                 mutex_unlock(&devlink->lock);
3177                                 goto out;
3178                         }
3179                         idx++;
3180                 }
3181                 mutex_unlock(&devlink->lock);
3182         }
3183 out:
3184         mutex_unlock(&devlink_mutex);
3185
3186         cb->args[0] = idx;
3187         return msg->len;
3188 }
3189
3190 static int
3191 devlink_param_type_get_from_info(struct genl_info *info,
3192                                  enum devlink_param_type *param_type)
3193 {
3194         if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE])
3195                 return -EINVAL;
3196
3197         switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
3198         case NLA_U8:
3199                 *param_type = DEVLINK_PARAM_TYPE_U8;
3200                 break;
3201         case NLA_U16:
3202                 *param_type = DEVLINK_PARAM_TYPE_U16;
3203                 break;
3204         case NLA_U32:
3205                 *param_type = DEVLINK_PARAM_TYPE_U32;
3206                 break;
3207         case NLA_STRING:
3208                 *param_type = DEVLINK_PARAM_TYPE_STRING;
3209                 break;
3210         case NLA_FLAG:
3211                 *param_type = DEVLINK_PARAM_TYPE_BOOL;
3212                 break;
3213         default:
3214                 return -EINVAL;
3215         }
3216
3217         return 0;
3218 }
3219
3220 static int
3221 devlink_param_value_get_from_info(const struct devlink_param *param,
3222                                   struct genl_info *info,
3223                                   union devlink_param_value *value)
3224 {
3225         int len;
3226
3227         if (param->type != DEVLINK_PARAM_TYPE_BOOL &&
3228             !info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA])
3229                 return -EINVAL;
3230
3231         switch (param->type) {
3232         case DEVLINK_PARAM_TYPE_U8:
3233                 value->vu8 = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3234                 break;
3235         case DEVLINK_PARAM_TYPE_U16:
3236                 value->vu16 = nla_get_u16(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3237                 break;
3238         case DEVLINK_PARAM_TYPE_U32:
3239                 value->vu32 = nla_get_u32(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3240                 break;
3241         case DEVLINK_PARAM_TYPE_STRING:
3242                 len = strnlen(nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]),
3243                               nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3244                 if (len == nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) ||
3245                     len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
3246                         return -EINVAL;
3247                 strcpy(value->vstr,
3248                        nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3249                 break;
3250         case DEVLINK_PARAM_TYPE_BOOL:
3251                 value->vbool = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA] ?
3252                                true : false;
3253                 break;
3254         }
3255         return 0;
3256 }
3257
3258 static struct devlink_param_item *
3259 devlink_param_get_from_info(struct list_head *param_list,
3260                             struct genl_info *info)
3261 {
3262         char *param_name;
3263
3264         if (!info->attrs[DEVLINK_ATTR_PARAM_NAME])
3265                 return NULL;
3266
3267         param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
3268         return devlink_param_find_by_name(param_list, param_name);
3269 }
3270
3271 static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
3272                                          struct genl_info *info)
3273 {
3274         struct devlink *devlink = info->user_ptr[0];
3275         struct devlink_param_item *param_item;
3276         struct sk_buff *msg;
3277         int err;
3278
3279         param_item = devlink_param_get_from_info(&devlink->param_list, info);
3280         if (!param_item)
3281                 return -EINVAL;
3282
3283         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3284         if (!msg)
3285                 return -ENOMEM;
3286
3287         err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3288                                     DEVLINK_CMD_PARAM_GET,
3289                                     info->snd_portid, info->snd_seq, 0);
3290         if (err) {
3291                 nlmsg_free(msg);
3292                 return err;
3293         }
3294
3295         return genlmsg_reply(msg, info);
3296 }
3297
3298 static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink,
3299                                            unsigned int port_index,
3300                                            struct list_head *param_list,
3301                                            struct genl_info *info,
3302                                            enum devlink_command cmd)
3303 {
3304         enum devlink_param_type param_type;
3305         struct devlink_param_gset_ctx ctx;
3306         enum devlink_param_cmode cmode;
3307         struct devlink_param_item *param_item;
3308         const struct devlink_param *param;
3309         union devlink_param_value value;
3310         int err = 0;
3311
3312         param_item = devlink_param_get_from_info(param_list, info);
3313         if (!param_item)
3314                 return -EINVAL;
3315         param = param_item->param;
3316         err = devlink_param_type_get_from_info(info, &param_type);
3317         if (err)
3318                 return err;
3319         if (param_type != param->type)
3320                 return -EINVAL;
3321         err = devlink_param_value_get_from_info(param, info, &value);
3322         if (err)
3323                 return err;
3324         if (param->validate) {
3325                 err = param->validate(devlink, param->id, value, info->extack);
3326                 if (err)
3327                         return err;
3328         }
3329
3330         if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE])
3331                 return -EINVAL;
3332         cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
3333         if (!devlink_param_cmode_is_supported(param, cmode))
3334                 return -EOPNOTSUPP;
3335
3336         if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3337                 if (param->type == DEVLINK_PARAM_TYPE_STRING)
3338                         strcpy(param_item->driverinit_value.vstr, value.vstr);
3339                 else
3340                         param_item->driverinit_value = value;
3341                 param_item->driverinit_value_valid = true;
3342         } else {
3343                 if (!param->set)
3344                         return -EOPNOTSUPP;
3345                 ctx.val = value;
3346                 ctx.cmode = cmode;
3347                 err = devlink_param_set(devlink, param, &ctx);
3348                 if (err)
3349                         return err;
3350         }
3351
3352         devlink_param_notify(devlink, port_index, param_item, cmd);
3353         return 0;
3354 }
3355
3356 static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
3357                                          struct genl_info *info)
3358 {
3359         struct devlink *devlink = info->user_ptr[0];
3360
3361         return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->param_list,
3362                                                info, DEVLINK_CMD_PARAM_NEW);
3363 }
3364
3365 static int devlink_param_register_one(struct devlink *devlink,
3366                                       unsigned int port_index,
3367                                       struct list_head *param_list,
3368                                       const struct devlink_param *param,
3369                                       enum devlink_command cmd)
3370 {
3371         struct devlink_param_item *param_item;
3372
3373         if (devlink_param_find_by_name(param_list, param->name))
3374                 return -EEXIST;
3375
3376         if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
3377                 WARN_ON(param->get || param->set);
3378         else
3379                 WARN_ON(!param->get || !param->set);
3380
3381         param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
3382         if (!param_item)
3383                 return -ENOMEM;
3384         param_item->param = param;
3385
3386         list_add_tail(&param_item->list, param_list);
3387         devlink_param_notify(devlink, port_index, param_item, cmd);
3388         return 0;
3389 }
3390
3391 static void devlink_param_unregister_one(struct devlink *devlink,
3392                                          unsigned int port_index,
3393                                          struct list_head *param_list,
3394                                          const struct devlink_param *param,
3395                                          enum devlink_command cmd)
3396 {
3397         struct devlink_param_item *param_item;
3398
3399         param_item = devlink_param_find_by_name(param_list, param->name);
3400         WARN_ON(!param_item);
3401         devlink_param_notify(devlink, port_index, param_item, cmd);
3402         list_del(&param_item->list);
3403         kfree(param_item);
3404 }
3405
3406 static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg,
3407                                                 struct netlink_callback *cb)
3408 {
3409         struct devlink_param_item *param_item;
3410         struct devlink_port *devlink_port;
3411         struct devlink *devlink;
3412         int start = cb->args[0];
3413         int idx = 0;
3414         int err;
3415
3416         mutex_lock(&devlink_mutex);
3417         list_for_each_entry(devlink, &devlink_list, list) {
3418                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3419                         continue;
3420                 mutex_lock(&devlink->lock);
3421                 list_for_each_entry(devlink_port, &devlink->port_list, list) {
3422                         list_for_each_entry(param_item,
3423                                             &devlink_port->param_list, list) {
3424                                 if (idx < start) {
3425                                         idx++;
3426                                         continue;
3427                                 }
3428                                 err = devlink_nl_param_fill(msg,
3429                                                 devlink_port->devlink,
3430                                                 devlink_port->index, param_item,
3431                                                 DEVLINK_CMD_PORT_PARAM_GET,
3432                                                 NETLINK_CB(cb->skb).portid,
3433                                                 cb->nlh->nlmsg_seq,
3434                                                 NLM_F_MULTI);
3435                                 if (err && err != -EOPNOTSUPP) {
3436                                         mutex_unlock(&devlink->lock);
3437                                         goto out;
3438                                 }
3439                                 idx++;
3440                         }
3441                 }
3442                 mutex_unlock(&devlink->lock);
3443         }
3444 out:
3445         mutex_unlock(&devlink_mutex);
3446
3447         cb->args[0] = idx;
3448         return msg->len;
3449 }
3450
3451 static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
3452                                               struct genl_info *info)
3453 {
3454         struct devlink_port *devlink_port = info->user_ptr[0];
3455         struct devlink_param_item *param_item;
3456         struct sk_buff *msg;
3457         int err;
3458
3459         param_item = devlink_param_get_from_info(&devlink_port->param_list,
3460                                                  info);
3461         if (!param_item)
3462                 return -EINVAL;
3463
3464         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3465         if (!msg)
3466                 return -ENOMEM;
3467
3468         err = devlink_nl_param_fill(msg, devlink_port->devlink,
3469                                     devlink_port->index, param_item,
3470                                     DEVLINK_CMD_PORT_PARAM_GET,
3471                                     info->snd_portid, info->snd_seq, 0);
3472         if (err) {
3473                 nlmsg_free(msg);
3474                 return err;
3475         }
3476
3477         return genlmsg_reply(msg, info);
3478 }
3479
3480 static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
3481                                               struct genl_info *info)
3482 {
3483         struct devlink_port *devlink_port = info->user_ptr[0];
3484
3485         return __devlink_nl_cmd_param_set_doit(devlink_port->devlink,
3486                                                devlink_port->index,
3487                                                &devlink_port->param_list, info,
3488                                                DEVLINK_CMD_PORT_PARAM_NEW);
3489 }
3490
3491 static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
3492                                              struct devlink *devlink,
3493                                              struct devlink_snapshot *snapshot)
3494 {
3495         struct nlattr *snap_attr;
3496         int err;
3497
3498         snap_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
3499         if (!snap_attr)
3500                 return -EINVAL;
3501
3502         err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
3503         if (err)
3504                 goto nla_put_failure;
3505
3506         nla_nest_end(msg, snap_attr);
3507         return 0;
3508
3509 nla_put_failure:
3510         nla_nest_cancel(msg, snap_attr);
3511         return err;
3512 }
3513
3514 static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
3515                                               struct devlink *devlink,
3516                                               struct devlink_region *region)
3517 {
3518         struct devlink_snapshot *snapshot;
3519         struct nlattr *snapshots_attr;
3520         int err;
3521
3522         snapshots_attr = nla_nest_start_noflag(msg,
3523                                                DEVLINK_ATTR_REGION_SNAPSHOTS);
3524         if (!snapshots_attr)
3525                 return -EINVAL;
3526
3527         list_for_each_entry(snapshot, &region->snapshot_list, list) {
3528                 err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
3529                 if (err)
3530                         goto nla_put_failure;
3531         }
3532
3533         nla_nest_end(msg, snapshots_attr);
3534         return 0;
3535
3536 nla_put_failure:
3537         nla_nest_cancel(msg, snapshots_attr);
3538         return err;
3539 }
3540
3541 static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
3542                                   enum devlink_command cmd, u32 portid,
3543                                   u32 seq, int flags,
3544                                   struct devlink_region *region)
3545 {
3546         void *hdr;
3547         int err;
3548
3549         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3550         if (!hdr)
3551                 return -EMSGSIZE;
3552
3553         err = devlink_nl_put_handle(msg, devlink);
3554         if (err)
3555                 goto nla_put_failure;
3556
3557         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->name);
3558         if (err)
3559                 goto nla_put_failure;
3560
3561         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3562                                 region->size,
3563                                 DEVLINK_ATTR_PAD);
3564         if (err)
3565                 goto nla_put_failure;
3566
3567         err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
3568         if (err)
3569                 goto nla_put_failure;
3570
3571         genlmsg_end(msg, hdr);
3572         return 0;
3573
3574 nla_put_failure:
3575         genlmsg_cancel(msg, hdr);
3576         return err;
3577 }
3578
3579 static void devlink_nl_region_notify(struct devlink_region *region,
3580                                      struct devlink_snapshot *snapshot,
3581                                      enum devlink_command cmd)
3582 {
3583         struct devlink *devlink = region->devlink;
3584         struct sk_buff *msg;
3585         void *hdr;
3586         int err;
3587
3588         WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
3589
3590         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3591         if (!msg)
3592                 return;
3593
3594         hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
3595         if (!hdr)
3596                 goto out_free_msg;
3597
3598         err = devlink_nl_put_handle(msg, devlink);
3599         if (err)
3600                 goto out_cancel_msg;
3601
3602         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
3603                              region->name);
3604         if (err)
3605                 goto out_cancel_msg;
3606
3607         if (snapshot) {
3608                 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
3609                                   snapshot->id);
3610                 if (err)
3611                         goto out_cancel_msg;
3612         } else {
3613                 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3614                                         region->size, DEVLINK_ATTR_PAD);
3615                 if (err)
3616                         goto out_cancel_msg;
3617         }
3618         genlmsg_end(msg, hdr);
3619
3620         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3621                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3622
3623         return;
3624
3625 out_cancel_msg:
3626         genlmsg_cancel(msg, hdr);
3627 out_free_msg:
3628         nlmsg_free(msg);
3629 }
3630
3631 static void devlink_region_snapshot_del(struct devlink_region *region,
3632                                         struct devlink_snapshot *snapshot)
3633 {
3634         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
3635         region->cur_snapshots--;
3636         list_del(&snapshot->list);
3637         (*snapshot->data_destructor)(snapshot->data);
3638         kfree(snapshot);
3639 }
3640
3641 static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
3642                                           struct genl_info *info)
3643 {
3644         struct devlink *devlink = info->user_ptr[0];
3645         struct devlink_region *region;
3646         const char *region_name;
3647         struct sk_buff *msg;
3648         int err;
3649
3650         if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
3651                 return -EINVAL;
3652
3653         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3654         region = devlink_region_get_by_name(devlink, region_name);
3655         if (!region)
3656                 return -EINVAL;
3657
3658         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3659         if (!msg)
3660                 return -ENOMEM;
3661
3662         err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
3663                                      info->snd_portid, info->snd_seq, 0,
3664                                      region);
3665         if (err) {
3666                 nlmsg_free(msg);
3667                 return err;
3668         }
3669
3670         return genlmsg_reply(msg, info);
3671 }
3672
3673 static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
3674                                             struct netlink_callback *cb)
3675 {
3676         struct devlink_region *region;
3677         struct devlink *devlink;
3678         int start = cb->args[0];
3679         int idx = 0;
3680         int err;
3681
3682         mutex_lock(&devlink_mutex);
3683         list_for_each_entry(devlink, &devlink_list, list) {
3684                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3685                         continue;
3686
3687                 mutex_lock(&devlink->lock);
3688                 list_for_each_entry(region, &devlink->region_list, list) {
3689                         if (idx < start) {
3690                                 idx++;
3691                                 continue;
3692                         }
3693                         err = devlink_nl_region_fill(msg, devlink,
3694                                                      DEVLINK_CMD_REGION_GET,
3695                                                      NETLINK_CB(cb->skb).portid,
3696                                                      cb->nlh->nlmsg_seq,
3697                                                      NLM_F_MULTI, region);
3698                         if (err) {
3699                                 mutex_unlock(&devlink->lock);
3700                                 goto out;
3701                         }
3702                         idx++;
3703                 }
3704                 mutex_unlock(&devlink->lock);
3705         }
3706 out:
3707         mutex_unlock(&devlink_mutex);
3708         cb->args[0] = idx;
3709         return msg->len;
3710 }
3711
3712 static int devlink_nl_cmd_region_del(struct sk_buff *skb,
3713                                      struct genl_info *info)
3714 {
3715         struct devlink *devlink = info->user_ptr[0];
3716         struct devlink_snapshot *snapshot;
3717         struct devlink_region *region;
3718         const char *region_name;
3719         u32 snapshot_id;
3720
3721         if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
3722             !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
3723                 return -EINVAL;
3724
3725         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3726         snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3727
3728         region = devlink_region_get_by_name(devlink, region_name);
3729         if (!region)
3730                 return -EINVAL;
3731
3732         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3733         if (!snapshot)
3734                 return -EINVAL;
3735
3736         devlink_region_snapshot_del(region, snapshot);
3737         return 0;
3738 }
3739
3740 static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
3741                                                  struct devlink *devlink,
3742                                                  u8 *chunk, u32 chunk_size,
3743                                                  u64 addr)
3744 {
3745         struct nlattr *chunk_attr;
3746         int err;
3747
3748         chunk_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_CHUNK);
3749         if (!chunk_attr)
3750                 return -EINVAL;
3751
3752         err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
3753         if (err)
3754                 goto nla_put_failure;
3755
3756         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
3757                                 DEVLINK_ATTR_PAD);
3758         if (err)
3759                 goto nla_put_failure;
3760
3761         nla_nest_end(msg, chunk_attr);
3762         return 0;
3763
3764 nla_put_failure:
3765         nla_nest_cancel(msg, chunk_attr);
3766         return err;
3767 }
3768
3769 #define DEVLINK_REGION_READ_CHUNK_SIZE 256
3770
3771 static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
3772                                                 struct devlink *devlink,
3773                                                 struct devlink_region *region,
3774                                                 struct nlattr **attrs,
3775                                                 u64 start_offset,
3776                                                 u64 end_offset,
3777                                                 bool dump,
3778                                                 u64 *new_offset)
3779 {
3780         struct devlink_snapshot *snapshot;
3781         u64 curr_offset = start_offset;
3782         u32 snapshot_id;
3783         int err = 0;
3784
3785         *new_offset = start_offset;
3786
3787         snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3788         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3789         if (!snapshot)
3790                 return -EINVAL;
3791
3792         if (end_offset > region->size || dump)
3793                 end_offset = region->size;
3794
3795         while (curr_offset < end_offset) {
3796                 u32 data_size;
3797                 u8 *data;
3798
3799                 if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
3800                         data_size = end_offset - curr_offset;
3801                 else
3802                         data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
3803
3804                 data = &snapshot->data[curr_offset];
3805                 err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
3806                                                             data, data_size,
3807                                                             curr_offset);
3808                 if (err)
3809                         break;
3810
3811                 curr_offset += data_size;
3812         }
3813         *new_offset = curr_offset;
3814
3815         return err;
3816 }
3817
3818 static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
3819                                              struct netlink_callback *cb)
3820 {
3821         u64 ret_offset, start_offset, end_offset = 0;
3822         struct devlink_region *region;
3823         struct nlattr *chunks_attr;
3824         const char *region_name;
3825         struct devlink *devlink;
3826         struct nlattr **attrs;
3827         bool dump = true;
3828         void *hdr;
3829         int err;
3830
3831         start_offset = *((u64 *)&cb->args[0]);
3832
3833         attrs = kmalloc_array(DEVLINK_ATTR_MAX + 1, sizeof(*attrs), GFP_KERNEL);
3834         if (!attrs)
3835                 return -ENOMEM;
3836
3837         err = nlmsg_parse_deprecated(cb->nlh,
3838                                      GENL_HDRLEN + devlink_nl_family.hdrsize,
3839                                      attrs, DEVLINK_ATTR_MAX,
3840                                      devlink_nl_family.policy, cb->extack);
3841         if (err)
3842                 goto out_free;
3843
3844         mutex_lock(&devlink_mutex);
3845         devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
3846         if (IS_ERR(devlink)) {
3847                 err = PTR_ERR(devlink);
3848                 goto out_dev;
3849         }
3850
3851         mutex_lock(&devlink->lock);
3852
3853         if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
3854             !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
3855                 err = -EINVAL;
3856                 goto out_unlock;
3857         }
3858
3859         region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
3860         region = devlink_region_get_by_name(devlink, region_name);
3861         if (!region) {
3862                 err = -EINVAL;
3863                 goto out_unlock;
3864         }
3865
3866         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3867                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
3868                           DEVLINK_CMD_REGION_READ);
3869         if (!hdr) {
3870                 err = -EMSGSIZE;
3871                 goto out_unlock;
3872         }
3873
3874         err = devlink_nl_put_handle(skb, devlink);
3875         if (err)
3876                 goto nla_put_failure;
3877
3878         err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
3879         if (err)
3880                 goto nla_put_failure;
3881
3882         chunks_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_REGION_CHUNKS);
3883         if (!chunks_attr) {
3884                 err = -EMSGSIZE;
3885                 goto nla_put_failure;
3886         }
3887
3888         if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
3889             attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
3890                 if (!start_offset)
3891                         start_offset =
3892                                 nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
3893
3894                 end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
3895                 end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
3896                 dump = false;
3897         }
3898
3899         err = devlink_nl_region_read_snapshot_fill(skb, devlink,
3900                                                    region, attrs,
3901                                                    start_offset,
3902                                                    end_offset, dump,
3903                                                    &ret_offset);
3904
3905         if (err && err != -EMSGSIZE)
3906                 goto nla_put_failure;
3907
3908         /* Check if there was any progress done to prevent infinite loop */
3909         if (ret_offset == start_offset) {
3910                 err = -EINVAL;
3911                 goto nla_put_failure;
3912         }
3913
3914         *((u64 *)&cb->args[0]) = ret_offset;
3915
3916         nla_nest_end(skb, chunks_attr);
3917         genlmsg_end(skb, hdr);
3918         mutex_unlock(&devlink->lock);
3919         mutex_unlock(&devlink_mutex);
3920         kfree(attrs);
3921
3922         return skb->len;
3923
3924 nla_put_failure:
3925         genlmsg_cancel(skb, hdr);
3926 out_unlock:
3927         mutex_unlock(&devlink->lock);
3928 out_dev:
3929         mutex_unlock(&devlink_mutex);
3930 out_free:
3931         kfree(attrs);
3932         return err;
3933 }
3934
3935 struct devlink_info_req {
3936         struct sk_buff *msg;
3937 };
3938
3939 int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name)
3940 {
3941         return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name);
3942 }
3943 EXPORT_SYMBOL_GPL(devlink_info_driver_name_put);
3944
3945 int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
3946 {
3947         return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn);
3948 }
3949 EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
3950
3951 static int devlink_info_version_put(struct devlink_info_req *req, int attr,
3952                                     const char *version_name,
3953                                     const char *version_value)
3954 {
3955         struct nlattr *nest;
3956         int err;
3957
3958         nest = nla_nest_start_noflag(req->msg, attr);
3959         if (!nest)
3960                 return -EMSGSIZE;
3961
3962         err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME,
3963                              version_name);
3964         if (err)
3965                 goto nla_put_failure;
3966
3967         err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE,
3968                              version_value);
3969         if (err)
3970                 goto nla_put_failure;
3971
3972         nla_nest_end(req->msg, nest);
3973
3974         return 0;
3975
3976 nla_put_failure:
3977         nla_nest_cancel(req->msg, nest);
3978         return err;
3979 }
3980
3981 int devlink_info_version_fixed_put(struct devlink_info_req *req,
3982                                    const char *version_name,
3983                                    const char *version_value)
3984 {
3985         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED,
3986                                         version_name, version_value);
3987 }
3988 EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
3989
3990 int devlink_info_version_stored_put(struct devlink_info_req *req,
3991                                     const char *version_name,
3992                                     const char *version_value)
3993 {
3994         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
3995                                         version_name, version_value);
3996 }
3997 EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
3998
3999 int devlink_info_version_running_put(struct devlink_info_req *req,
4000                                      const char *version_name,
4001                                      const char *version_value)
4002 {
4003         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
4004                                         version_name, version_value);
4005 }
4006 EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
4007
4008 static int
4009 devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
4010                      enum devlink_command cmd, u32 portid,
4011                      u32 seq, int flags, struct netlink_ext_ack *extack)
4012 {
4013         struct devlink_info_req req;
4014         void *hdr;
4015         int err;
4016
4017         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4018         if (!hdr)
4019                 return -EMSGSIZE;
4020
4021         err = -EMSGSIZE;
4022         if (devlink_nl_put_handle(msg, devlink))
4023                 goto err_cancel_msg;
4024
4025         req.msg = msg;
4026         err = devlink->ops->info_get(devlink, &req, extack);
4027         if (err)
4028                 goto err_cancel_msg;
4029
4030         genlmsg_end(msg, hdr);
4031         return 0;
4032
4033 err_cancel_msg:
4034         genlmsg_cancel(msg, hdr);
4035         return err;
4036 }
4037
4038 static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb,
4039                                         struct genl_info *info)
4040 {
4041         struct devlink *devlink = info->user_ptr[0];
4042         struct sk_buff *msg;
4043         int err;
4044
4045         if (!devlink->ops->info_get)
4046                 return -EOPNOTSUPP;
4047
4048         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4049         if (!msg)
4050                 return -ENOMEM;
4051
4052         err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4053                                    info->snd_portid, info->snd_seq, 0,
4054                                    info->extack);
4055         if (err) {
4056                 nlmsg_free(msg);
4057                 return err;
4058         }
4059
4060         return genlmsg_reply(msg, info);
4061 }
4062
4063 static int devlink_nl_cmd_info_get_dumpit(struct sk_buff *msg,
4064                                           struct netlink_callback *cb)
4065 {
4066         struct devlink *devlink;
4067         int start = cb->args[0];
4068         int idx = 0;
4069         int err;
4070
4071         mutex_lock(&devlink_mutex);
4072         list_for_each_entry(devlink, &devlink_list, list) {
4073                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4074                         continue;
4075                 if (idx < start) {
4076                         idx++;
4077                         continue;
4078                 }
4079
4080                 if (!devlink->ops->info_get) {
4081                         idx++;
4082                         continue;
4083                 }
4084
4085                 mutex_lock(&devlink->lock);
4086                 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4087                                            NETLINK_CB(cb->skb).portid,
4088                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
4089                                            cb->extack);
4090                 mutex_unlock(&devlink->lock);
4091                 if (err && err != -EOPNOTSUPP)
4092                         break;
4093                 idx++;
4094         }
4095         mutex_unlock(&devlink_mutex);
4096
4097         cb->args[0] = idx;
4098         return msg->len;
4099 }
4100
4101 struct devlink_fmsg_item {
4102         struct list_head list;
4103         int attrtype;
4104         u8 nla_type;
4105         u16 len;
4106         int value[0];
4107 };
4108
4109 struct devlink_fmsg {
4110         struct list_head item_list;
4111 };
4112
4113 static struct devlink_fmsg *devlink_fmsg_alloc(void)
4114 {
4115         struct devlink_fmsg *fmsg;
4116
4117         fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
4118         if (!fmsg)
4119                 return NULL;
4120
4121         INIT_LIST_HEAD(&fmsg->item_list);
4122
4123         return fmsg;
4124 }
4125
4126 static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
4127 {
4128         struct devlink_fmsg_item *item, *tmp;
4129
4130         list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
4131                 list_del(&item->list);
4132                 kfree(item);
4133         }
4134         kfree(fmsg);
4135 }
4136
4137 static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
4138                                     int attrtype)
4139 {
4140         struct devlink_fmsg_item *item;
4141
4142         item = kzalloc(sizeof(*item), GFP_KERNEL);
4143         if (!item)
4144                 return -ENOMEM;
4145
4146         item->attrtype = attrtype;
4147         list_add_tail(&item->list, &fmsg->item_list);
4148
4149         return 0;
4150 }
4151
4152 int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
4153 {
4154         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
4155 }
4156 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
4157
4158 static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
4159 {
4160         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
4161 }
4162
4163 int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
4164 {
4165         return devlink_fmsg_nest_end(fmsg);
4166 }
4167 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
4168
4169 #define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
4170
4171 static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
4172 {
4173         struct devlink_fmsg_item *item;
4174
4175         if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
4176                 return -EMSGSIZE;
4177
4178         item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
4179         if (!item)
4180                 return -ENOMEM;
4181
4182         item->nla_type = NLA_NUL_STRING;
4183         item->len = strlen(name) + 1;
4184         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
4185         memcpy(&item->value, name, item->len);
4186         list_add_tail(&item->list, &fmsg->item_list);
4187
4188         return 0;
4189 }
4190
4191 int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
4192 {
4193         int err;
4194
4195         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
4196         if (err)
4197                 return err;
4198
4199         err = devlink_fmsg_put_name(fmsg, name);
4200         if (err)
4201                 return err;
4202
4203         return 0;
4204 }
4205 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
4206
4207 int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
4208 {
4209         return devlink_fmsg_nest_end(fmsg);
4210 }
4211 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
4212
4213 int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
4214                                      const char *name)
4215 {
4216         int err;
4217
4218         err = devlink_fmsg_pair_nest_start(fmsg, name);
4219         if (err)
4220                 return err;
4221
4222         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
4223         if (err)
4224                 return err;
4225
4226         return 0;
4227 }
4228 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
4229
4230 int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
4231 {
4232         int err;
4233
4234         err = devlink_fmsg_nest_end(fmsg);
4235         if (err)
4236                 return err;
4237
4238         err = devlink_fmsg_nest_end(fmsg);
4239         if (err)
4240                 return err;
4241
4242         return 0;
4243 }
4244 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
4245
4246 static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
4247                                   const void *value, u16 value_len,
4248                                   u8 value_nla_type)
4249 {
4250         struct devlink_fmsg_item *item;
4251
4252         if (value_len > DEVLINK_FMSG_MAX_SIZE)
4253                 return -EMSGSIZE;
4254
4255         item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
4256         if (!item)
4257                 return -ENOMEM;
4258
4259         item->nla_type = value_nla_type;
4260         item->len = value_len;
4261         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4262         memcpy(&item->value, value, item->len);
4263         list_add_tail(&item->list, &fmsg->item_list);
4264
4265         return 0;
4266 }
4267
4268 int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
4269 {
4270         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
4271 }
4272 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
4273
4274 int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
4275 {
4276         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
4277 }
4278 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
4279
4280 int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
4281 {
4282         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
4283 }
4284 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
4285
4286 int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
4287 {
4288         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
4289 }
4290 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
4291
4292 int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
4293 {
4294         return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
4295                                       NLA_NUL_STRING);
4296 }
4297 EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
4298
4299 int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
4300                             u16 value_len)
4301 {
4302         return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
4303 }
4304 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
4305
4306 int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
4307                                bool value)
4308 {
4309         int err;
4310
4311         err = devlink_fmsg_pair_nest_start(fmsg, name);
4312         if (err)
4313                 return err;
4314
4315         err = devlink_fmsg_bool_put(fmsg, value);
4316         if (err)
4317                 return err;
4318
4319         err = devlink_fmsg_pair_nest_end(fmsg);
4320         if (err)
4321                 return err;
4322
4323         return 0;
4324 }
4325 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
4326
4327 int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
4328                              u8 value)
4329 {
4330         int err;
4331
4332         err = devlink_fmsg_pair_nest_start(fmsg, name);
4333         if (err)
4334                 return err;
4335
4336         err = devlink_fmsg_u8_put(fmsg, value);
4337         if (err)
4338                 return err;
4339
4340         err = devlink_fmsg_pair_nest_end(fmsg);
4341         if (err)
4342                 return err;
4343
4344         return 0;
4345 }
4346 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
4347
4348 int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
4349                               u32 value)
4350 {
4351         int err;
4352
4353         err = devlink_fmsg_pair_nest_start(fmsg, name);
4354         if (err)
4355                 return err;
4356
4357         err = devlink_fmsg_u32_put(fmsg, value);
4358         if (err)
4359                 return err;
4360
4361         err = devlink_fmsg_pair_nest_end(fmsg);
4362         if (err)
4363                 return err;
4364
4365         return 0;
4366 }
4367 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
4368
4369 int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
4370                               u64 value)
4371 {
4372         int err;
4373
4374         err = devlink_fmsg_pair_nest_start(fmsg, name);
4375         if (err)
4376                 return err;
4377
4378         err = devlink_fmsg_u64_put(fmsg, value);
4379         if (err)
4380                 return err;
4381
4382         err = devlink_fmsg_pair_nest_end(fmsg);
4383         if (err)
4384                 return err;
4385
4386         return 0;
4387 }
4388 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
4389
4390 int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
4391                                  const char *value)
4392 {
4393         int err;
4394
4395         err = devlink_fmsg_pair_nest_start(fmsg, name);
4396         if (err)
4397                 return err;
4398
4399         err = devlink_fmsg_string_put(fmsg, value);
4400         if (err)
4401                 return err;
4402
4403         err = devlink_fmsg_pair_nest_end(fmsg);
4404         if (err)
4405                 return err;
4406
4407         return 0;
4408 }
4409 EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
4410
4411 int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
4412                                  const void *value, u16 value_len)
4413 {
4414         int err;
4415
4416         err = devlink_fmsg_pair_nest_start(fmsg, name);
4417         if (err)
4418                 return err;
4419
4420         err = devlink_fmsg_binary_put(fmsg, value, value_len);
4421         if (err)
4422                 return err;
4423
4424         err = devlink_fmsg_pair_nest_end(fmsg);
4425         if (err)
4426                 return err;
4427
4428         return 0;
4429 }
4430 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
4431
4432 static int
4433 devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4434 {
4435         switch (msg->nla_type) {
4436         case NLA_FLAG:
4437         case NLA_U8:
4438         case NLA_U32:
4439         case NLA_U64:
4440         case NLA_NUL_STRING:
4441         case NLA_BINARY:
4442                 return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
4443                                   msg->nla_type);
4444         default:
4445                 return -EINVAL;
4446         }
4447 }
4448
4449 static int
4450 devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4451 {
4452         int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4453         u8 tmp;
4454
4455         switch (msg->nla_type) {
4456         case NLA_FLAG:
4457                 /* Always provide flag data, regardless of its value */
4458                 tmp = *(bool *) msg->value;
4459
4460                 return nla_put_u8(skb, attrtype, tmp);
4461         case NLA_U8:
4462                 return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
4463         case NLA_U32:
4464                 return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
4465         case NLA_U64:
4466                 return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
4467                                          DEVLINK_ATTR_PAD);
4468         case NLA_NUL_STRING:
4469                 return nla_put_string(skb, attrtype, (char *) &msg->value);
4470         case NLA_BINARY:
4471                 return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
4472         default:
4473                 return -EINVAL;
4474         }
4475 }
4476
4477 static int
4478 devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4479                          int *start)
4480 {
4481         struct devlink_fmsg_item *item;
4482         struct nlattr *fmsg_nlattr;
4483         int i = 0;
4484         int err;
4485
4486         fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
4487         if (!fmsg_nlattr)
4488                 return -EMSGSIZE;
4489
4490         list_for_each_entry(item, &fmsg->item_list, list) {
4491                 if (i < *start) {
4492                         i++;
4493                         continue;
4494                 }
4495
4496                 switch (item->attrtype) {
4497                 case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
4498                 case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
4499                 case DEVLINK_ATTR_FMSG_ARR_NEST_START:
4500                 case DEVLINK_ATTR_FMSG_NEST_END:
4501                         err = nla_put_flag(skb, item->attrtype);
4502                         break;
4503                 case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
4504                         err = devlink_fmsg_item_fill_type(item, skb);
4505                         if (err)
4506                                 break;
4507                         err = devlink_fmsg_item_fill_data(item, skb);
4508                         break;
4509                 case DEVLINK_ATTR_FMSG_OBJ_NAME:
4510                         err = nla_put_string(skb, item->attrtype,
4511                                              (char *) &item->value);
4512                         break;
4513                 default:
4514                         err = -EINVAL;
4515                         break;
4516                 }
4517                 if (!err)
4518                         *start = ++i;
4519                 else
4520                         break;
4521         }
4522
4523         nla_nest_end(skb, fmsg_nlattr);
4524         return err;
4525 }
4526
4527 static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
4528                             struct genl_info *info,
4529                             enum devlink_command cmd, int flags)
4530 {
4531         struct nlmsghdr *nlh;
4532         struct sk_buff *skb;
4533         bool last = false;
4534         int index = 0;
4535         void *hdr;
4536         int err;
4537
4538         while (!last) {
4539                 int tmp_index = index;
4540
4541                 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4542                 if (!skb)
4543                         return -ENOMEM;
4544
4545                 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
4546                                   &devlink_nl_family, flags | NLM_F_MULTI, cmd);
4547                 if (!hdr) {
4548                         err = -EMSGSIZE;
4549                         goto nla_put_failure;
4550                 }
4551
4552                 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
4553                 if (!err)
4554                         last = true;
4555                 else if (err != -EMSGSIZE || tmp_index == index)
4556                         goto nla_put_failure;
4557
4558                 genlmsg_end(skb, hdr);
4559                 err = genlmsg_reply(skb, info);
4560                 if (err)
4561                         return err;
4562         }
4563
4564         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4565         if (!skb)
4566                 return -ENOMEM;
4567         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
4568                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
4569         if (!nlh) {
4570                 err = -EMSGSIZE;
4571                 goto nla_put_failure;
4572         }
4573
4574         return genlmsg_reply(skb, info);
4575
4576 nla_put_failure:
4577         nlmsg_free(skb);
4578         return err;
4579 }
4580
4581 static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4582                                struct netlink_callback *cb,
4583                                enum devlink_command cmd)
4584 {
4585         int index = cb->args[0];
4586         int tmp_index = index;
4587         void *hdr;
4588         int err;
4589
4590         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
4591                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
4592         if (!hdr) {
4593                 err = -EMSGSIZE;
4594                 goto nla_put_failure;
4595         }
4596
4597         err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
4598         if ((err && err != -EMSGSIZE) || tmp_index == index)
4599                 goto nla_put_failure;
4600
4601         cb->args[0] = index;
4602         genlmsg_end(skb, hdr);
4603         return skb->len;
4604
4605 nla_put_failure:
4606         genlmsg_cancel(skb, hdr);
4607         return err;
4608 }
4609
4610 struct devlink_health_reporter {
4611         struct list_head list;
4612         void *priv;
4613         const struct devlink_health_reporter_ops *ops;
4614         struct devlink *devlink;
4615         struct devlink_fmsg *dump_fmsg;
4616         struct mutex dump_lock; /* lock parallel read/write from dump buffers */
4617         u64 graceful_period;
4618         bool auto_recover;
4619         u8 health_state;
4620         u64 dump_ts;
4621         u64 error_count;
4622         u64 recovery_count;
4623         u64 last_recovery_ts;
4624         refcount_t refcount;
4625 };
4626
4627 void *
4628 devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
4629 {
4630         return reporter->priv;
4631 }
4632 EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
4633
4634 static struct devlink_health_reporter *
4635 devlink_health_reporter_find_by_name(struct devlink *devlink,
4636                                      const char *reporter_name)
4637 {
4638         struct devlink_health_reporter *reporter;
4639
4640         lockdep_assert_held(&devlink->reporters_lock);
4641         list_for_each_entry(reporter, &devlink->reporter_list, list)
4642                 if (!strcmp(reporter->ops->name, reporter_name))
4643                         return reporter;
4644         return NULL;
4645 }
4646
4647 /**
4648  *      devlink_health_reporter_create - create devlink health reporter
4649  *
4650  *      @devlink: devlink
4651  *      @ops: ops
4652  *      @graceful_period: to avoid recovery loops, in msecs
4653  *      @auto_recover: auto recover when error occurs
4654  *      @priv: priv
4655  */
4656 struct devlink_health_reporter *
4657 devlink_health_reporter_create(struct devlink *devlink,
4658                                const struct devlink_health_reporter_ops *ops,
4659                                u64 graceful_period, bool auto_recover,
4660                                void *priv)
4661 {
4662         struct devlink_health_reporter *reporter;
4663
4664         mutex_lock(&devlink->reporters_lock);
4665         if (devlink_health_reporter_find_by_name(devlink, ops->name)) {
4666                 reporter = ERR_PTR(-EEXIST);
4667                 goto unlock;
4668         }
4669
4670         if (WARN_ON(auto_recover && !ops->recover) ||
4671             WARN_ON(graceful_period && !ops->recover)) {
4672                 reporter = ERR_PTR(-EINVAL);
4673                 goto unlock;
4674         }
4675
4676         reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
4677         if (!reporter) {
4678                 reporter = ERR_PTR(-ENOMEM);
4679                 goto unlock;
4680         }
4681
4682         reporter->priv = priv;
4683         reporter->ops = ops;
4684         reporter->devlink = devlink;
4685         reporter->graceful_period = graceful_period;
4686         reporter->auto_recover = auto_recover;
4687         mutex_init(&reporter->dump_lock);
4688         refcount_set(&reporter->refcount, 1);
4689         list_add_tail(&reporter->list, &devlink->reporter_list);
4690 unlock:
4691         mutex_unlock(&devlink->reporters_lock);
4692         return reporter;
4693 }
4694 EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
4695
4696 /**
4697  *      devlink_health_reporter_destroy - destroy devlink health reporter
4698  *
4699  *      @reporter: devlink health reporter to destroy
4700  */
4701 void
4702 devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
4703 {
4704         mutex_lock(&reporter->devlink->reporters_lock);
4705         list_del(&reporter->list);
4706         mutex_unlock(&reporter->devlink->reporters_lock);
4707         while (refcount_read(&reporter->refcount) > 1)
4708                 msleep(100);
4709         mutex_destroy(&reporter->dump_lock);
4710         if (reporter->dump_fmsg)
4711                 devlink_fmsg_free(reporter->dump_fmsg);
4712         kfree(reporter);
4713 }
4714 EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
4715
4716 void
4717 devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
4718                                      enum devlink_health_reporter_state state)
4719 {
4720         if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
4721                     state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
4722                 return;
4723
4724         if (reporter->health_state == state)
4725                 return;
4726
4727         reporter->health_state = state;
4728         trace_devlink_health_reporter_state_update(reporter->devlink,
4729                                                    reporter->ops->name, state);
4730 }
4731 EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
4732
4733 static int
4734 devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
4735                                 void *priv_ctx)
4736 {
4737         int err;
4738
4739         if (!reporter->ops->recover)
4740                 return -EOPNOTSUPP;
4741
4742         err = reporter->ops->recover(reporter, priv_ctx);
4743         if (err)
4744                 return err;
4745
4746         reporter->recovery_count++;
4747         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
4748         reporter->last_recovery_ts = jiffies;
4749
4750         return 0;
4751 }
4752
4753 static void
4754 devlink_health_dump_clear(struct devlink_health_reporter *reporter)
4755 {
4756         if (!reporter->dump_fmsg)
4757                 return;
4758         devlink_fmsg_free(reporter->dump_fmsg);
4759         reporter->dump_fmsg = NULL;
4760 }
4761
4762 static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
4763                                   void *priv_ctx)
4764 {
4765         int err;
4766
4767         if (!reporter->ops->dump)
4768                 return 0;
4769
4770         if (reporter->dump_fmsg)
4771                 return 0;
4772
4773         reporter->dump_fmsg = devlink_fmsg_alloc();
4774         if (!reporter->dump_fmsg) {
4775                 err = -ENOMEM;
4776                 return err;
4777         }
4778
4779         err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
4780         if (err)
4781                 goto dump_err;
4782
4783         err = reporter->ops->dump(reporter, reporter->dump_fmsg,
4784                                   priv_ctx);
4785         if (err)
4786                 goto dump_err;
4787
4788         err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
4789         if (err)
4790                 goto dump_err;
4791
4792         reporter->dump_ts = jiffies;
4793
4794         return 0;
4795
4796 dump_err:
4797         devlink_health_dump_clear(reporter);
4798         return err;
4799 }
4800
4801 int devlink_health_report(struct devlink_health_reporter *reporter,
4802                           const char *msg, void *priv_ctx)
4803 {
4804         enum devlink_health_reporter_state prev_health_state;
4805         struct devlink *devlink = reporter->devlink;
4806
4807         /* write a log message of the current error */
4808         WARN_ON(!msg);
4809         trace_devlink_health_report(devlink, reporter->ops->name, msg);
4810         reporter->error_count++;
4811         prev_health_state = reporter->health_state;
4812         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
4813
4814         /* abort if the previous error wasn't recovered */
4815         if (reporter->auto_recover &&
4816             (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
4817              jiffies - reporter->last_recovery_ts <
4818              msecs_to_jiffies(reporter->graceful_period))) {
4819                 trace_devlink_health_recover_aborted(devlink,
4820                                                      reporter->ops->name,
4821                                                      reporter->health_state,
4822                                                      jiffies -
4823                                                      reporter->last_recovery_ts);
4824                 return -ECANCELED;
4825         }
4826
4827         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
4828
4829         mutex_lock(&reporter->dump_lock);
4830         /* store current dump of current error, for later analysis */
4831         devlink_health_do_dump(reporter, priv_ctx);
4832         mutex_unlock(&reporter->dump_lock);
4833
4834         if (reporter->auto_recover)
4835                 return devlink_health_reporter_recover(reporter, priv_ctx);
4836
4837         return 0;
4838 }
4839 EXPORT_SYMBOL_GPL(devlink_health_report);
4840
4841 static struct devlink_health_reporter *
4842 devlink_health_reporter_get_from_attrs(struct devlink *devlink,
4843                                        struct nlattr **attrs)
4844 {
4845         struct devlink_health_reporter *reporter;
4846         char *reporter_name;
4847
4848         if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
4849                 return NULL;
4850
4851         reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
4852         mutex_lock(&devlink->reporters_lock);
4853         reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
4854         if (reporter)
4855                 refcount_inc(&reporter->refcount);
4856         mutex_unlock(&devlink->reporters_lock);
4857         return reporter;
4858 }
4859
4860 static struct devlink_health_reporter *
4861 devlink_health_reporter_get_from_info(struct devlink *devlink,
4862                                       struct genl_info *info)
4863 {
4864         return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
4865 }
4866
4867 static struct devlink_health_reporter *
4868 devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
4869 {
4870         struct devlink_health_reporter *reporter;
4871         struct devlink *devlink;
4872         struct nlattr **attrs;
4873         int err;
4874
4875         attrs = kmalloc_array(DEVLINK_ATTR_MAX + 1, sizeof(*attrs), GFP_KERNEL);
4876         if (!attrs)
4877                 return NULL;
4878
4879         err = nlmsg_parse_deprecated(cb->nlh,
4880                                      GENL_HDRLEN + devlink_nl_family.hdrsize,
4881                                      attrs, DEVLINK_ATTR_MAX,
4882                                      devlink_nl_family.policy, cb->extack);
4883         if (err)
4884                 goto free;
4885
4886         mutex_lock(&devlink_mutex);
4887         devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
4888         if (IS_ERR(devlink))
4889                 goto unlock;
4890
4891         reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
4892         mutex_unlock(&devlink_mutex);
4893         kfree(attrs);
4894         return reporter;
4895 unlock:
4896         mutex_unlock(&devlink_mutex);
4897 free:
4898         kfree(attrs);
4899         return NULL;
4900 }
4901
4902 static void
4903 devlink_health_reporter_put(struct devlink_health_reporter *reporter)
4904 {
4905         refcount_dec(&reporter->refcount);
4906 }
4907
4908 static int
4909 devlink_nl_health_reporter_fill(struct sk_buff *msg,
4910                                 struct devlink *devlink,
4911                                 struct devlink_health_reporter *reporter,
4912                                 enum devlink_command cmd, u32 portid,
4913                                 u32 seq, int flags)
4914 {
4915         struct nlattr *reporter_attr;
4916         void *hdr;
4917
4918         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4919         if (!hdr)
4920                 return -EMSGSIZE;
4921
4922         if (devlink_nl_put_handle(msg, devlink))
4923                 goto genlmsg_cancel;
4924
4925         reporter_attr = nla_nest_start_noflag(msg,
4926                                               DEVLINK_ATTR_HEALTH_REPORTER);
4927         if (!reporter_attr)
4928                 goto genlmsg_cancel;
4929         if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
4930                            reporter->ops->name))
4931                 goto reporter_nest_cancel;
4932         if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
4933                        reporter->health_state))
4934                 goto reporter_nest_cancel;
4935         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
4936                               reporter->error_count, DEVLINK_ATTR_PAD))
4937                 goto reporter_nest_cancel;
4938         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
4939                               reporter->recovery_count, DEVLINK_ATTR_PAD))
4940                 goto reporter_nest_cancel;
4941         if (reporter->ops->recover &&
4942             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
4943                               reporter->graceful_period,
4944                               DEVLINK_ATTR_PAD))
4945                 goto reporter_nest_cancel;
4946         if (reporter->ops->recover &&
4947             nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
4948                        reporter->auto_recover))
4949                 goto reporter_nest_cancel;
4950         if (reporter->dump_fmsg &&
4951             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
4952                               jiffies_to_msecs(reporter->dump_ts),
4953                               DEVLINK_ATTR_PAD))
4954                 goto reporter_nest_cancel;
4955
4956         nla_nest_end(msg, reporter_attr);
4957         genlmsg_end(msg, hdr);
4958         return 0;
4959
4960 reporter_nest_cancel:
4961         nla_nest_end(msg, reporter_attr);
4962 genlmsg_cancel:
4963         genlmsg_cancel(msg, hdr);
4964         return -EMSGSIZE;
4965 }
4966
4967 static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
4968                                                    struct genl_info *info)
4969 {
4970         struct devlink *devlink = info->user_ptr[0];
4971         struct devlink_health_reporter *reporter;
4972         struct sk_buff *msg;
4973         int err;
4974
4975         reporter = devlink_health_reporter_get_from_info(devlink, info);
4976         if (!reporter)
4977                 return -EINVAL;
4978
4979         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4980         if (!msg) {
4981                 err = -ENOMEM;
4982                 goto out;
4983         }
4984
4985         err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
4986                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
4987                                               info->snd_portid, info->snd_seq,
4988                                               0);
4989         if (err) {
4990                 nlmsg_free(msg);
4991                 goto out;
4992         }
4993
4994         err = genlmsg_reply(msg, info);
4995 out:
4996         devlink_health_reporter_put(reporter);
4997         return err;
4998 }
4999
5000 static int
5001 devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
5002                                           struct netlink_callback *cb)
5003 {
5004         struct devlink_health_reporter *reporter;
5005         struct devlink *devlink;
5006         int start = cb->args[0];
5007         int idx = 0;
5008         int err;
5009
5010         mutex_lock(&devlink_mutex);
5011         list_for_each_entry(devlink, &devlink_list, list) {
5012                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5013                         continue;
5014                 mutex_lock(&devlink->reporters_lock);
5015                 list_for_each_entry(reporter, &devlink->reporter_list,
5016                                     list) {
5017                         if (idx < start) {
5018                                 idx++;
5019                                 continue;
5020                         }
5021                         err = devlink_nl_health_reporter_fill(msg, devlink,
5022                                                               reporter,
5023                                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
5024                                                               NETLINK_CB(cb->skb).portid,
5025                                                               cb->nlh->nlmsg_seq,
5026                                                               NLM_F_MULTI);
5027                         if (err) {
5028                                 mutex_unlock(&devlink->reporters_lock);
5029                                 goto out;
5030                         }
5031                         idx++;
5032                 }
5033                 mutex_unlock(&devlink->reporters_lock);
5034         }
5035 out:
5036         mutex_unlock(&devlink_mutex);
5037
5038         cb->args[0] = idx;
5039         return msg->len;
5040 }
5041
5042 static int
5043 devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
5044                                         struct genl_info *info)
5045 {
5046         struct devlink *devlink = info->user_ptr[0];
5047         struct devlink_health_reporter *reporter;
5048         int err;
5049
5050         reporter = devlink_health_reporter_get_from_info(devlink, info);
5051         if (!reporter)
5052                 return -EINVAL;
5053
5054         if (!reporter->ops->recover &&
5055             (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
5056              info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])) {
5057                 err = -EOPNOTSUPP;
5058                 goto out;
5059         }
5060
5061         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
5062                 reporter->graceful_period =
5063                         nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
5064
5065         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
5066                 reporter->auto_recover =
5067                         nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
5068
5069         devlink_health_reporter_put(reporter);
5070         return 0;
5071 out:
5072         devlink_health_reporter_put(reporter);
5073         return err;
5074 }
5075
5076 static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
5077                                                        struct genl_info *info)
5078 {
5079         struct devlink *devlink = info->user_ptr[0];
5080         struct devlink_health_reporter *reporter;
5081         int err;
5082
5083         reporter = devlink_health_reporter_get_from_info(devlink, info);
5084         if (!reporter)
5085                 return -EINVAL;
5086
5087         err = devlink_health_reporter_recover(reporter, NULL);
5088
5089         devlink_health_reporter_put(reporter);
5090         return err;
5091 }
5092
5093 static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
5094                                                         struct genl_info *info)
5095 {
5096         struct devlink *devlink = info->user_ptr[0];
5097         struct devlink_health_reporter *reporter;
5098         struct devlink_fmsg *fmsg;
5099         int err;
5100
5101         reporter = devlink_health_reporter_get_from_info(devlink, info);
5102         if (!reporter)
5103                 return -EINVAL;
5104
5105         if (!reporter->ops->diagnose) {
5106                 devlink_health_reporter_put(reporter);
5107                 return -EOPNOTSUPP;
5108         }
5109
5110         fmsg = devlink_fmsg_alloc();
5111         if (!fmsg) {
5112                 devlink_health_reporter_put(reporter);
5113                 return -ENOMEM;
5114         }
5115
5116         err = devlink_fmsg_obj_nest_start(fmsg);
5117         if (err)
5118                 goto out;
5119
5120         err = reporter->ops->diagnose(reporter, fmsg);
5121         if (err)
5122                 goto out;
5123
5124         err = devlink_fmsg_obj_nest_end(fmsg);
5125         if (err)
5126                 goto out;
5127
5128         err = devlink_fmsg_snd(fmsg, info,
5129                                DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
5130
5131 out:
5132         devlink_fmsg_free(fmsg);
5133         devlink_health_reporter_put(reporter);
5134         return err;
5135 }
5136
5137 static int
5138 devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
5139                                                struct netlink_callback *cb)
5140 {
5141         struct devlink_health_reporter *reporter;
5142         u64 start = cb->args[0];
5143         int err;
5144
5145         reporter = devlink_health_reporter_get_from_cb(cb);
5146         if (!reporter)
5147                 return -EINVAL;
5148
5149         if (!reporter->ops->dump) {
5150                 err = -EOPNOTSUPP;
5151                 goto out;
5152         }
5153         mutex_lock(&reporter->dump_lock);
5154         if (!start) {
5155                 err = devlink_health_do_dump(reporter, NULL);
5156                 if (err)
5157                         goto unlock;
5158                 cb->args[1] = reporter->dump_ts;
5159         }
5160         if (!reporter->dump_fmsg || cb->args[1] != reporter->dump_ts) {
5161                 NL_SET_ERR_MSG_MOD(cb->extack, "Dump trampled, please retry");
5162                 err = -EAGAIN;
5163                 goto unlock;
5164         }
5165
5166         err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
5167                                   DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
5168 unlock:
5169         mutex_unlock(&reporter->dump_lock);
5170 out:
5171         devlink_health_reporter_put(reporter);
5172         return err;
5173 }
5174
5175 static int
5176 devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
5177                                                struct genl_info *info)
5178 {
5179         struct devlink *devlink = info->user_ptr[0];
5180         struct devlink_health_reporter *reporter;
5181
5182         reporter = devlink_health_reporter_get_from_info(devlink, info);
5183         if (!reporter)
5184                 return -EINVAL;
5185
5186         if (!reporter->ops->dump) {
5187                 devlink_health_reporter_put(reporter);
5188                 return -EOPNOTSUPP;
5189         }
5190
5191         mutex_lock(&reporter->dump_lock);
5192         devlink_health_dump_clear(reporter);
5193         mutex_unlock(&reporter->dump_lock);
5194         devlink_health_reporter_put(reporter);
5195         return 0;
5196 }
5197
5198 struct devlink_stats {
5199         u64 rx_bytes;
5200         u64 rx_packets;
5201         struct u64_stats_sync syncp;
5202 };
5203
5204 /**
5205  * struct devlink_trap_group_item - Packet trap group attributes.
5206  * @group: Immutable packet trap group attributes.
5207  * @refcount: Number of trap items using the group.
5208  * @list: trap_group_list member.
5209  * @stats: Trap group statistics.
5210  *
5211  * Describes packet trap group attributes. Created by devlink during trap
5212  * registration.
5213  */
5214 struct devlink_trap_group_item {
5215         const struct devlink_trap_group *group;
5216         refcount_t refcount;
5217         struct list_head list;
5218         struct devlink_stats __percpu *stats;
5219 };
5220
5221 /**
5222  * struct devlink_trap_item - Packet trap attributes.
5223  * @trap: Immutable packet trap attributes.
5224  * @group_item: Associated group item.
5225  * @list: trap_list member.
5226  * @action: Trap action.
5227  * @stats: Trap statistics.
5228  * @priv: Driver private information.
5229  *
5230  * Describes both mutable and immutable packet trap attributes. Created by
5231  * devlink during trap registration and used for all trap related operations.
5232  */
5233 struct devlink_trap_item {
5234         const struct devlink_trap *trap;
5235         struct devlink_trap_group_item *group_item;
5236         struct list_head list;
5237         enum devlink_trap_action action;
5238         struct devlink_stats __percpu *stats;
5239         void *priv;
5240 };
5241
5242 static struct devlink_trap_item *
5243 devlink_trap_item_lookup(struct devlink *devlink, const char *name)
5244 {
5245         struct devlink_trap_item *trap_item;
5246
5247         list_for_each_entry(trap_item, &devlink->trap_list, list) {
5248                 if (!strcmp(trap_item->trap->name, name))
5249                         return trap_item;
5250         }
5251
5252         return NULL;
5253 }
5254
5255 static struct devlink_trap_item *
5256 devlink_trap_item_get_from_info(struct devlink *devlink,
5257                                 struct genl_info *info)
5258 {
5259         struct nlattr *attr;
5260
5261         if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
5262                 return NULL;
5263         attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
5264
5265         return devlink_trap_item_lookup(devlink, nla_data(attr));
5266 }
5267
5268 static int
5269 devlink_trap_action_get_from_info(struct genl_info *info,
5270                                   enum devlink_trap_action *p_trap_action)
5271 {
5272         u8 val;
5273
5274         val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
5275         switch (val) {
5276         case DEVLINK_TRAP_ACTION_DROP: /* fall-through */
5277         case DEVLINK_TRAP_ACTION_TRAP:
5278                 *p_trap_action = val;
5279                 break;
5280         default:
5281                 return -EINVAL;
5282         }
5283
5284         return 0;
5285 }
5286
5287 static int devlink_trap_metadata_put(struct sk_buff *msg,
5288                                      const struct devlink_trap *trap)
5289 {
5290         struct nlattr *attr;
5291
5292         attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
5293         if (!attr)
5294                 return -EMSGSIZE;
5295
5296         if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
5297             nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
5298                 goto nla_put_failure;
5299
5300         nla_nest_end(msg, attr);
5301
5302         return 0;
5303
5304 nla_put_failure:
5305         nla_nest_cancel(msg, attr);
5306         return -EMSGSIZE;
5307 }
5308
5309 static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
5310                                     struct devlink_stats *stats)
5311 {
5312         int i;
5313
5314         memset(stats, 0, sizeof(*stats));
5315         for_each_possible_cpu(i) {
5316                 struct devlink_stats *cpu_stats;
5317                 u64 rx_packets, rx_bytes;
5318                 unsigned int start;
5319
5320                 cpu_stats = per_cpu_ptr(trap_stats, i);
5321                 do {
5322                         start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
5323                         rx_packets = cpu_stats->rx_packets;
5324                         rx_bytes = cpu_stats->rx_bytes;
5325                 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
5326
5327                 stats->rx_packets += rx_packets;
5328                 stats->rx_bytes += rx_bytes;
5329         }
5330 }
5331
5332 static int devlink_trap_stats_put(struct sk_buff *msg,
5333                                   struct devlink_stats __percpu *trap_stats)
5334 {
5335         struct devlink_stats stats;
5336         struct nlattr *attr;
5337
5338         devlink_trap_stats_read(trap_stats, &stats);
5339
5340         attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
5341         if (!attr)
5342                 return -EMSGSIZE;
5343
5344         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
5345                               stats.rx_packets, DEVLINK_ATTR_PAD))
5346                 goto nla_put_failure;
5347
5348         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
5349                               stats.rx_bytes, DEVLINK_ATTR_PAD))
5350                 goto nla_put_failure;
5351
5352         nla_nest_end(msg, attr);
5353
5354         return 0;
5355
5356 nla_put_failure:
5357         nla_nest_cancel(msg, attr);
5358         return -EMSGSIZE;
5359 }
5360
5361 static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
5362                                 const struct devlink_trap_item *trap_item,
5363                                 enum devlink_command cmd, u32 portid, u32 seq,
5364                                 int flags)
5365 {
5366         struct devlink_trap_group_item *group_item = trap_item->group_item;
5367         void *hdr;
5368         int err;
5369
5370         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5371         if (!hdr)
5372                 return -EMSGSIZE;
5373
5374         if (devlink_nl_put_handle(msg, devlink))
5375                 goto nla_put_failure;
5376
5377         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5378                            group_item->group->name))
5379                 goto nla_put_failure;
5380
5381         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
5382                 goto nla_put_failure;
5383
5384         if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
5385                 goto nla_put_failure;
5386
5387         if (trap_item->trap->generic &&
5388             nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5389                 goto nla_put_failure;
5390
5391         if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
5392                 goto nla_put_failure;
5393
5394         err = devlink_trap_metadata_put(msg, trap_item->trap);
5395         if (err)
5396                 goto nla_put_failure;
5397
5398         err = devlink_trap_stats_put(msg, trap_item->stats);
5399         if (err)
5400                 goto nla_put_failure;
5401
5402         genlmsg_end(msg, hdr);
5403
5404         return 0;
5405
5406 nla_put_failure:
5407         genlmsg_cancel(msg, hdr);
5408         return -EMSGSIZE;
5409 }
5410
5411 static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb,
5412                                         struct genl_info *info)
5413 {
5414         struct netlink_ext_ack *extack = info->extack;
5415         struct devlink *devlink = info->user_ptr[0];
5416         struct devlink_trap_item *trap_item;
5417         struct sk_buff *msg;
5418         int err;
5419
5420         if (list_empty(&devlink->trap_list))
5421                 return -EOPNOTSUPP;
5422
5423         trap_item = devlink_trap_item_get_from_info(devlink, info);
5424         if (!trap_item) {
5425                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
5426                 return -ENOENT;
5427         }
5428
5429         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5430         if (!msg)
5431                 return -ENOMEM;
5432
5433         err = devlink_nl_trap_fill(msg, devlink, trap_item,
5434                                    DEVLINK_CMD_TRAP_NEW, info->snd_portid,
5435                                    info->snd_seq, 0);
5436         if (err)
5437                 goto err_trap_fill;
5438
5439         return genlmsg_reply(msg, info);
5440
5441 err_trap_fill:
5442         nlmsg_free(msg);
5443         return err;
5444 }
5445
5446 static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
5447                                           struct netlink_callback *cb)
5448 {
5449         struct devlink_trap_item *trap_item;
5450         struct devlink *devlink;
5451         int start = cb->args[0];
5452         int idx = 0;
5453         int err;
5454
5455         mutex_lock(&devlink_mutex);
5456         list_for_each_entry(devlink, &devlink_list, list) {
5457                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5458                         continue;
5459                 mutex_lock(&devlink->lock);
5460                 list_for_each_entry(trap_item, &devlink->trap_list, list) {
5461                         if (idx < start) {
5462                                 idx++;
5463                                 continue;
5464                         }
5465                         err = devlink_nl_trap_fill(msg, devlink, trap_item,
5466                                                    DEVLINK_CMD_TRAP_NEW,
5467                                                    NETLINK_CB(cb->skb).portid,
5468                                                    cb->nlh->nlmsg_seq,
5469                                                    NLM_F_MULTI);
5470                         if (err) {
5471                                 mutex_unlock(&devlink->lock);
5472                                 goto out;
5473                         }
5474                         idx++;
5475                 }
5476                 mutex_unlock(&devlink->lock);
5477         }
5478 out:
5479         mutex_unlock(&devlink_mutex);
5480
5481         cb->args[0] = idx;
5482         return msg->len;
5483 }
5484
5485 static int __devlink_trap_action_set(struct devlink *devlink,
5486                                      struct devlink_trap_item *trap_item,
5487                                      enum devlink_trap_action trap_action,
5488                                      struct netlink_ext_ack *extack)
5489 {
5490         int err;
5491
5492         if (trap_item->action != trap_action &&
5493             trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
5494                 NL_SET_ERR_MSG_MOD(extack, "Cannot change action of non-drop traps. Skipping");
5495                 return 0;
5496         }
5497
5498         err = devlink->ops->trap_action_set(devlink, trap_item->trap,
5499                                             trap_action);
5500         if (err)
5501                 return err;
5502
5503         trap_item->action = trap_action;
5504
5505         return 0;
5506 }
5507
5508 static int devlink_trap_action_set(struct devlink *devlink,
5509                                    struct devlink_trap_item *trap_item,
5510                                    struct genl_info *info)
5511 {
5512         enum devlink_trap_action trap_action;
5513         int err;
5514
5515         if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
5516                 return 0;
5517
5518         err = devlink_trap_action_get_from_info(info, &trap_action);
5519         if (err) {
5520                 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
5521                 return -EINVAL;
5522         }
5523
5524         return __devlink_trap_action_set(devlink, trap_item, trap_action,
5525                                          info->extack);
5526 }
5527
5528 static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb,
5529                                         struct genl_info *info)
5530 {
5531         struct netlink_ext_ack *extack = info->extack;
5532         struct devlink *devlink = info->user_ptr[0];
5533         struct devlink_trap_item *trap_item;
5534         int err;
5535
5536         if (list_empty(&devlink->trap_list))
5537                 return -EOPNOTSUPP;
5538
5539         trap_item = devlink_trap_item_get_from_info(devlink, info);
5540         if (!trap_item) {
5541                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
5542                 return -ENOENT;
5543         }
5544
5545         err = devlink_trap_action_set(devlink, trap_item, info);
5546         if (err)
5547                 return err;
5548
5549         return 0;
5550 }
5551
5552 static struct devlink_trap_group_item *
5553 devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
5554 {
5555         struct devlink_trap_group_item *group_item;
5556
5557         list_for_each_entry(group_item, &devlink->trap_group_list, list) {
5558                 if (!strcmp(group_item->group->name, name))
5559                         return group_item;
5560         }
5561
5562         return NULL;
5563 }
5564
5565 static struct devlink_trap_group_item *
5566 devlink_trap_group_item_get_from_info(struct devlink *devlink,
5567                                       struct genl_info *info)
5568 {
5569         char *name;
5570
5571         if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
5572                 return NULL;
5573         name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
5574
5575         return devlink_trap_group_item_lookup(devlink, name);
5576 }
5577
5578 static int
5579 devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
5580                            const struct devlink_trap_group_item *group_item,
5581                            enum devlink_command cmd, u32 portid, u32 seq,
5582                            int flags)
5583 {
5584         void *hdr;
5585         int err;
5586
5587         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5588         if (!hdr)
5589                 return -EMSGSIZE;
5590
5591         if (devlink_nl_put_handle(msg, devlink))
5592                 goto nla_put_failure;
5593
5594         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5595                            group_item->group->name))
5596                 goto nla_put_failure;
5597
5598         if (group_item->group->generic &&
5599             nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5600                 goto nla_put_failure;
5601
5602         err = devlink_trap_stats_put(msg, group_item->stats);
5603         if (err)
5604                 goto nla_put_failure;
5605
5606         genlmsg_end(msg, hdr);
5607
5608         return 0;
5609
5610 nla_put_failure:
5611         genlmsg_cancel(msg, hdr);
5612         return -EMSGSIZE;
5613 }
5614
5615 static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb,
5616                                               struct genl_info *info)
5617 {
5618         struct netlink_ext_ack *extack = info->extack;
5619         struct devlink *devlink = info->user_ptr[0];
5620         struct devlink_trap_group_item *group_item;
5621         struct sk_buff *msg;
5622         int err;
5623
5624         if (list_empty(&devlink->trap_group_list))
5625                 return -EOPNOTSUPP;
5626
5627         group_item = devlink_trap_group_item_get_from_info(devlink, info);
5628         if (!group_item) {
5629                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
5630                 return -ENOENT;
5631         }
5632
5633         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5634         if (!msg)
5635                 return -ENOMEM;
5636
5637         err = devlink_nl_trap_group_fill(msg, devlink, group_item,
5638                                          DEVLINK_CMD_TRAP_GROUP_NEW,
5639                                          info->snd_portid, info->snd_seq, 0);
5640         if (err)
5641                 goto err_trap_group_fill;
5642
5643         return genlmsg_reply(msg, info);
5644
5645 err_trap_group_fill:
5646         nlmsg_free(msg);
5647         return err;
5648 }
5649
5650 static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
5651                                                 struct netlink_callback *cb)
5652 {
5653         enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW;
5654         struct devlink_trap_group_item *group_item;
5655         u32 portid = NETLINK_CB(cb->skb).portid;
5656         struct devlink *devlink;
5657         int start = cb->args[0];
5658         int idx = 0;
5659         int err;
5660
5661         mutex_lock(&devlink_mutex);
5662         list_for_each_entry(devlink, &devlink_list, list) {
5663                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5664                         continue;
5665                 mutex_lock(&devlink->lock);
5666                 list_for_each_entry(group_item, &devlink->trap_group_list,
5667                                     list) {
5668                         if (idx < start) {
5669                                 idx++;
5670                                 continue;
5671                         }
5672                         err = devlink_nl_trap_group_fill(msg, devlink,
5673                                                          group_item, cmd,
5674                                                          portid,
5675                                                          cb->nlh->nlmsg_seq,
5676                                                          NLM_F_MULTI);
5677                         if (err) {
5678                                 mutex_unlock(&devlink->lock);
5679                                 goto out;
5680                         }
5681                         idx++;
5682                 }
5683                 mutex_unlock(&devlink->lock);
5684         }
5685 out:
5686         mutex_unlock(&devlink_mutex);
5687
5688         cb->args[0] = idx;
5689         return msg->len;
5690 }
5691
5692 static int
5693 __devlink_trap_group_action_set(struct devlink *devlink,
5694                                 struct devlink_trap_group_item *group_item,
5695                                 enum devlink_trap_action trap_action,
5696                                 struct netlink_ext_ack *extack)
5697 {
5698         const char *group_name = group_item->group->name;
5699         struct devlink_trap_item *trap_item;
5700         int err;
5701
5702         list_for_each_entry(trap_item, &devlink->trap_list, list) {
5703                 if (strcmp(trap_item->trap->group.name, group_name))
5704                         continue;
5705                 err = __devlink_trap_action_set(devlink, trap_item,
5706                                                 trap_action, extack);
5707                 if (err)
5708                         return err;
5709         }
5710
5711         return 0;
5712 }
5713
5714 static int
5715 devlink_trap_group_action_set(struct devlink *devlink,
5716                               struct devlink_trap_group_item *group_item,
5717                               struct genl_info *info)
5718 {
5719         enum devlink_trap_action trap_action;
5720         int err;
5721
5722         if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
5723                 return 0;
5724
5725         err = devlink_trap_action_get_from_info(info, &trap_action);
5726         if (err) {
5727                 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
5728                 return -EINVAL;
5729         }
5730
5731         err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
5732                                               info->extack);
5733         if (err)
5734                 return err;
5735
5736         return 0;
5737 }
5738
5739 static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
5740                                               struct genl_info *info)
5741 {
5742         struct netlink_ext_ack *extack = info->extack;
5743         struct devlink *devlink = info->user_ptr[0];
5744         struct devlink_trap_group_item *group_item;
5745         int err;
5746
5747         if (list_empty(&devlink->trap_group_list))
5748                 return -EOPNOTSUPP;
5749
5750         group_item = devlink_trap_group_item_get_from_info(devlink, info);
5751         if (!group_item) {
5752                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
5753                 return -ENOENT;
5754         }
5755
5756         err = devlink_trap_group_action_set(devlink, group_item, info);
5757         if (err)
5758                 return err;
5759
5760         return 0;
5761 }
5762
5763 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
5764         [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
5765         [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
5766         [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
5767         [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
5768         [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
5769         [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
5770         [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
5771         [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
5772         [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
5773         [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
5774         [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
5775         [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
5776         [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
5777         [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
5778         [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
5779         [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
5780         [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
5781         [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
5782         [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
5783         [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
5784         [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
5785         [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
5786         [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
5787         [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
5788         [DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },
5789         [DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },
5790         [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
5791         [DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
5792         [DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
5793         [DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING },
5794         [DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 },
5795         [DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING },
5796 };
5797
5798 static const struct genl_ops devlink_nl_ops[] = {
5799         {
5800                 .cmd = DEVLINK_CMD_GET,
5801                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5802                 .doit = devlink_nl_cmd_get_doit,
5803                 .dumpit = devlink_nl_cmd_get_dumpit,
5804                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5805                 /* can be retrieved by unprivileged users */
5806         },
5807         {
5808                 .cmd = DEVLINK_CMD_PORT_GET,
5809                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5810                 .doit = devlink_nl_cmd_port_get_doit,
5811                 .dumpit = devlink_nl_cmd_port_get_dumpit,
5812                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5813                 /* can be retrieved by unprivileged users */
5814         },
5815         {
5816                 .cmd = DEVLINK_CMD_PORT_SET,
5817                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5818                 .doit = devlink_nl_cmd_port_set_doit,
5819                 .flags = GENL_ADMIN_PERM,
5820                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5821         },
5822         {
5823                 .cmd = DEVLINK_CMD_PORT_SPLIT,
5824                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5825                 .doit = devlink_nl_cmd_port_split_doit,
5826                 .flags = GENL_ADMIN_PERM,
5827                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5828                                   DEVLINK_NL_FLAG_NO_LOCK,
5829         },
5830         {
5831                 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
5832                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5833                 .doit = devlink_nl_cmd_port_unsplit_doit,
5834                 .flags = GENL_ADMIN_PERM,
5835                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5836                                   DEVLINK_NL_FLAG_NO_LOCK,
5837         },
5838         {
5839                 .cmd = DEVLINK_CMD_SB_GET,
5840                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5841                 .doit = devlink_nl_cmd_sb_get_doit,
5842                 .dumpit = devlink_nl_cmd_sb_get_dumpit,
5843                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5844                                   DEVLINK_NL_FLAG_NEED_SB,
5845                 /* can be retrieved by unprivileged users */
5846         },
5847         {
5848                 .cmd = DEVLINK_CMD_SB_POOL_GET,
5849                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5850                 .doit = devlink_nl_cmd_sb_pool_get_doit,
5851                 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
5852                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5853                                   DEVLINK_NL_FLAG_NEED_SB,
5854                 /* can be retrieved by unprivileged users */
5855         },
5856         {
5857                 .cmd = DEVLINK_CMD_SB_POOL_SET,
5858                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5859                 .doit = devlink_nl_cmd_sb_pool_set_doit,
5860                 .flags = GENL_ADMIN_PERM,
5861                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5862                                   DEVLINK_NL_FLAG_NEED_SB,
5863         },
5864         {
5865                 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
5866                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5867                 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
5868                 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
5869                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5870                                   DEVLINK_NL_FLAG_NEED_SB,
5871                 /* can be retrieved by unprivileged users */
5872         },
5873         {
5874                 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
5875                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5876                 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
5877                 .flags = GENL_ADMIN_PERM,
5878                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5879                                   DEVLINK_NL_FLAG_NEED_SB,
5880         },
5881         {
5882                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
5883                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5884                 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
5885                 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
5886                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5887                                   DEVLINK_NL_FLAG_NEED_SB,
5888                 /* can be retrieved by unprivileged users */
5889         },
5890         {
5891                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
5892                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5893                 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
5894                 .flags = GENL_ADMIN_PERM,
5895                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5896                                   DEVLINK_NL_FLAG_NEED_SB,
5897         },
5898         {
5899                 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
5900                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5901                 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
5902                 .flags = GENL_ADMIN_PERM,
5903                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5904                                   DEVLINK_NL_FLAG_NEED_SB,
5905         },
5906         {
5907                 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
5908                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5909                 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
5910                 .flags = GENL_ADMIN_PERM,
5911                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5912                                   DEVLINK_NL_FLAG_NEED_SB,
5913         },
5914         {
5915                 .cmd = DEVLINK_CMD_ESWITCH_GET,
5916                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5917                 .doit = devlink_nl_cmd_eswitch_get_doit,
5918                 .flags = GENL_ADMIN_PERM,
5919                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5920         },
5921         {
5922                 .cmd = DEVLINK_CMD_ESWITCH_SET,
5923                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5924                 .doit = devlink_nl_cmd_eswitch_set_doit,
5925                 .flags = GENL_ADMIN_PERM,
5926                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5927                                   DEVLINK_NL_FLAG_NO_LOCK,
5928         },
5929         {
5930                 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
5931                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5932                 .doit = devlink_nl_cmd_dpipe_table_get,
5933                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5934                 /* can be retrieved by unprivileged users */
5935         },
5936         {
5937                 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
5938                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5939                 .doit = devlink_nl_cmd_dpipe_entries_get,
5940                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5941                 /* can be retrieved by unprivileged users */
5942         },
5943         {
5944                 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
5945                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5946                 .doit = devlink_nl_cmd_dpipe_headers_get,
5947                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5948                 /* can be retrieved by unprivileged users */
5949         },
5950         {
5951                 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
5952                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5953                 .doit = devlink_nl_cmd_dpipe_table_counters_set,
5954                 .flags = GENL_ADMIN_PERM,
5955                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5956         },
5957         {
5958                 .cmd = DEVLINK_CMD_RESOURCE_SET,
5959                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5960                 .doit = devlink_nl_cmd_resource_set,
5961                 .flags = GENL_ADMIN_PERM,
5962                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5963         },
5964         {
5965                 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
5966                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5967                 .doit = devlink_nl_cmd_resource_dump,
5968                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5969                 /* can be retrieved by unprivileged users */
5970         },
5971         {
5972                 .cmd = DEVLINK_CMD_RELOAD,
5973                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5974                 .doit = devlink_nl_cmd_reload,
5975                 .flags = GENL_ADMIN_PERM,
5976                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5977                                   DEVLINK_NL_FLAG_NO_LOCK,
5978         },
5979         {
5980                 .cmd = DEVLINK_CMD_PARAM_GET,
5981                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5982                 .doit = devlink_nl_cmd_param_get_doit,
5983                 .dumpit = devlink_nl_cmd_param_get_dumpit,
5984                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5985                 /* can be retrieved by unprivileged users */
5986         },
5987         {
5988                 .cmd = DEVLINK_CMD_PARAM_SET,
5989                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5990                 .doit = devlink_nl_cmd_param_set_doit,
5991                 .flags = GENL_ADMIN_PERM,
5992                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5993         },
5994         {
5995                 .cmd = DEVLINK_CMD_PORT_PARAM_GET,
5996                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5997                 .doit = devlink_nl_cmd_port_param_get_doit,
5998                 .dumpit = devlink_nl_cmd_port_param_get_dumpit,
5999                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6000                 /* can be retrieved by unprivileged users */
6001         },
6002         {
6003                 .cmd = DEVLINK_CMD_PORT_PARAM_SET,
6004                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6005                 .doit = devlink_nl_cmd_port_param_set_doit,
6006                 .flags = GENL_ADMIN_PERM,
6007                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6008         },
6009         {
6010                 .cmd = DEVLINK_CMD_REGION_GET,
6011                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6012                 .doit = devlink_nl_cmd_region_get_doit,
6013                 .dumpit = devlink_nl_cmd_region_get_dumpit,
6014                 .flags = GENL_ADMIN_PERM,
6015                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6016         },
6017         {
6018                 .cmd = DEVLINK_CMD_REGION_DEL,
6019                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6020                 .doit = devlink_nl_cmd_region_del,
6021                 .flags = GENL_ADMIN_PERM,
6022                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6023         },
6024         {
6025                 .cmd = DEVLINK_CMD_REGION_READ,
6026                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6027                 .dumpit = devlink_nl_cmd_region_read_dumpit,
6028                 .flags = GENL_ADMIN_PERM,
6029                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6030         },
6031         {
6032                 .cmd = DEVLINK_CMD_INFO_GET,
6033                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6034                 .doit = devlink_nl_cmd_info_get_doit,
6035                 .dumpit = devlink_nl_cmd_info_get_dumpit,
6036                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6037                 /* can be retrieved by unprivileged users */
6038         },
6039         {
6040                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
6041                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6042                 .doit = devlink_nl_cmd_health_reporter_get_doit,
6043                 .dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
6044                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6045                                   DEVLINK_NL_FLAG_NO_LOCK,
6046                 /* can be retrieved by unprivileged users */
6047         },
6048         {
6049                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
6050                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6051                 .doit = devlink_nl_cmd_health_reporter_set_doit,
6052                 .flags = GENL_ADMIN_PERM,
6053                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6054                                   DEVLINK_NL_FLAG_NO_LOCK,
6055         },
6056         {
6057                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
6058                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6059                 .doit = devlink_nl_cmd_health_reporter_recover_doit,
6060                 .flags = GENL_ADMIN_PERM,
6061                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6062                                   DEVLINK_NL_FLAG_NO_LOCK,
6063         },
6064         {
6065                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
6066                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6067                 .doit = devlink_nl_cmd_health_reporter_diagnose_doit,
6068                 .flags = GENL_ADMIN_PERM,
6069                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6070                                   DEVLINK_NL_FLAG_NO_LOCK,
6071         },
6072         {
6073                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
6074                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6075                 .dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
6076                 .flags = GENL_ADMIN_PERM,
6077                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6078                                   DEVLINK_NL_FLAG_NO_LOCK,
6079         },
6080         {
6081                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
6082                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6083                 .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
6084                 .flags = GENL_ADMIN_PERM,
6085                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6086                                   DEVLINK_NL_FLAG_NO_LOCK,
6087         },
6088         {
6089                 .cmd = DEVLINK_CMD_FLASH_UPDATE,
6090                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6091                 .doit = devlink_nl_cmd_flash_update,
6092                 .flags = GENL_ADMIN_PERM,
6093                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6094         },
6095         {
6096                 .cmd = DEVLINK_CMD_TRAP_GET,
6097                 .doit = devlink_nl_cmd_trap_get_doit,
6098                 .dumpit = devlink_nl_cmd_trap_get_dumpit,
6099                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6100                 /* can be retrieved by unprivileged users */
6101         },
6102         {
6103                 .cmd = DEVLINK_CMD_TRAP_SET,
6104                 .doit = devlink_nl_cmd_trap_set_doit,
6105                 .flags = GENL_ADMIN_PERM,
6106                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6107         },
6108         {
6109                 .cmd = DEVLINK_CMD_TRAP_GROUP_GET,
6110                 .doit = devlink_nl_cmd_trap_group_get_doit,
6111                 .dumpit = devlink_nl_cmd_trap_group_get_dumpit,
6112                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6113                 /* can be retrieved by unprivileged users */
6114         },
6115         {
6116                 .cmd = DEVLINK_CMD_TRAP_GROUP_SET,
6117                 .doit = devlink_nl_cmd_trap_group_set_doit,
6118                 .flags = GENL_ADMIN_PERM,
6119                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6120         },
6121 };
6122
6123 static struct genl_family devlink_nl_family __ro_after_init = {
6124         .name           = DEVLINK_GENL_NAME,
6125         .version        = DEVLINK_GENL_VERSION,
6126         .maxattr        = DEVLINK_ATTR_MAX,
6127         .policy = devlink_nl_policy,
6128         .netnsok        = true,
6129         .pre_doit       = devlink_nl_pre_doit,
6130         .post_doit      = devlink_nl_post_doit,
6131         .module         = THIS_MODULE,
6132         .ops            = devlink_nl_ops,
6133         .n_ops          = ARRAY_SIZE(devlink_nl_ops),
6134         .mcgrps         = devlink_nl_mcgrps,
6135         .n_mcgrps       = ARRAY_SIZE(devlink_nl_mcgrps),
6136 };
6137
6138 /**
6139  *      devlink_alloc - Allocate new devlink instance resources
6140  *
6141  *      @ops: ops
6142  *      @priv_size: size of user private data
6143  *
6144  *      Allocate new devlink instance resources, including devlink index
6145  *      and name.
6146  */
6147 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
6148 {
6149         struct devlink *devlink;
6150
6151         if (WARN_ON(!ops))
6152                 return NULL;
6153
6154         devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
6155         if (!devlink)
6156                 return NULL;
6157         devlink->ops = ops;
6158         devlink_net_set(devlink, &init_net);
6159         INIT_LIST_HEAD(&devlink->port_list);
6160         INIT_LIST_HEAD(&devlink->sb_list);
6161         INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
6162         INIT_LIST_HEAD(&devlink->resource_list);
6163         INIT_LIST_HEAD(&devlink->param_list);
6164         INIT_LIST_HEAD(&devlink->region_list);
6165         INIT_LIST_HEAD(&devlink->reporter_list);
6166         INIT_LIST_HEAD(&devlink->trap_list);
6167         INIT_LIST_HEAD(&devlink->trap_group_list);
6168         mutex_init(&devlink->lock);
6169         mutex_init(&devlink->reporters_lock);
6170         return devlink;
6171 }
6172 EXPORT_SYMBOL_GPL(devlink_alloc);
6173
6174 /**
6175  *      devlink_register - Register devlink instance
6176  *
6177  *      @devlink: devlink
6178  *      @dev: parent device
6179  */
6180 int devlink_register(struct devlink *devlink, struct device *dev)
6181 {
6182         mutex_lock(&devlink_mutex);
6183         devlink->dev = dev;
6184         list_add_tail(&devlink->list, &devlink_list);
6185         devlink_notify(devlink, DEVLINK_CMD_NEW);
6186         mutex_unlock(&devlink_mutex);
6187         return 0;
6188 }
6189 EXPORT_SYMBOL_GPL(devlink_register);
6190
6191 /**
6192  *      devlink_unregister - Unregister devlink instance
6193  *
6194  *      @devlink: devlink
6195  */
6196 void devlink_unregister(struct devlink *devlink)
6197 {
6198         mutex_lock(&devlink_mutex);
6199         devlink_notify(devlink, DEVLINK_CMD_DEL);
6200         list_del(&devlink->list);
6201         mutex_unlock(&devlink_mutex);
6202 }
6203 EXPORT_SYMBOL_GPL(devlink_unregister);
6204
6205 /**
6206  *      devlink_free - Free devlink instance resources
6207  *
6208  *      @devlink: devlink
6209  */
6210 void devlink_free(struct devlink *devlink)
6211 {
6212         mutex_destroy(&devlink->reporters_lock);
6213         mutex_destroy(&devlink->lock);
6214         WARN_ON(!list_empty(&devlink->trap_group_list));
6215         WARN_ON(!list_empty(&devlink->trap_list));
6216         WARN_ON(!list_empty(&devlink->reporter_list));
6217         WARN_ON(!list_empty(&devlink->region_list));
6218         WARN_ON(!list_empty(&devlink->param_list));
6219         WARN_ON(!list_empty(&devlink->resource_list));
6220         WARN_ON(!list_empty(&devlink->dpipe_table_list));
6221         WARN_ON(!list_empty(&devlink->sb_list));
6222         WARN_ON(!list_empty(&devlink->port_list));
6223
6224         kfree(devlink);
6225 }
6226 EXPORT_SYMBOL_GPL(devlink_free);
6227
6228 static void devlink_port_type_warn(struct work_struct *work)
6229 {
6230         WARN(true, "Type was not set for devlink port.");
6231 }
6232
6233 static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
6234 {
6235         /* Ignore CPU and DSA flavours. */
6236         return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
6237                devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA;
6238 }
6239
6240 #define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 30)
6241
6242 static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
6243 {
6244         if (!devlink_port_type_should_warn(devlink_port))
6245                 return;
6246         /* Schedule a work to WARN in case driver does not set port
6247          * type within timeout.
6248          */
6249         schedule_delayed_work(&devlink_port->type_warn_dw,
6250                               DEVLINK_PORT_TYPE_WARN_TIMEOUT);
6251 }
6252
6253 static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
6254 {
6255         if (!devlink_port_type_should_warn(devlink_port))
6256                 return;
6257         cancel_delayed_work_sync(&devlink_port->type_warn_dw);
6258 }
6259
6260 /**
6261  *      devlink_port_register - Register devlink port
6262  *
6263  *      @devlink: devlink
6264  *      @devlink_port: devlink port
6265  *      @port_index: driver-specific numerical identifier of the port
6266  *
6267  *      Register devlink port with provided port index. User can use
6268  *      any indexing, even hw-related one. devlink_port structure
6269  *      is convenient to be embedded inside user driver private structure.
6270  *      Note that the caller should take care of zeroing the devlink_port
6271  *      structure.
6272  */
6273 int devlink_port_register(struct devlink *devlink,
6274                           struct devlink_port *devlink_port,
6275                           unsigned int port_index)
6276 {
6277         mutex_lock(&devlink->lock);
6278         if (devlink_port_index_exists(devlink, port_index)) {
6279                 mutex_unlock(&devlink->lock);
6280                 return -EEXIST;
6281         }
6282         devlink_port->devlink = devlink;
6283         devlink_port->index = port_index;
6284         devlink_port->registered = true;
6285         spin_lock_init(&devlink_port->type_lock);
6286         list_add_tail(&devlink_port->list, &devlink->port_list);
6287         INIT_LIST_HEAD(&devlink_port->param_list);
6288         mutex_unlock(&devlink->lock);
6289         INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
6290         devlink_port_type_warn_schedule(devlink_port);
6291         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
6292         return 0;
6293 }
6294 EXPORT_SYMBOL_GPL(devlink_port_register);
6295
6296 /**
6297  *      devlink_port_unregister - Unregister devlink port
6298  *
6299  *      @devlink_port: devlink port
6300  */
6301 void devlink_port_unregister(struct devlink_port *devlink_port)
6302 {
6303         struct devlink *devlink = devlink_port->devlink;
6304
6305         devlink_port_type_warn_cancel(devlink_port);
6306         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
6307         mutex_lock(&devlink->lock);
6308         list_del(&devlink_port->list);
6309         mutex_unlock(&devlink->lock);
6310 }
6311 EXPORT_SYMBOL_GPL(devlink_port_unregister);
6312
6313 static void __devlink_port_type_set(struct devlink_port *devlink_port,
6314                                     enum devlink_port_type type,
6315                                     void *type_dev)
6316 {
6317         if (WARN_ON(!devlink_port->registered))
6318                 return;
6319         devlink_port_type_warn_cancel(devlink_port);
6320         spin_lock_bh(&devlink_port->type_lock);
6321         devlink_port->type = type;
6322         devlink_port->type_dev = type_dev;
6323         spin_unlock_bh(&devlink_port->type_lock);
6324         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
6325 }
6326
6327 /**
6328  *      devlink_port_type_eth_set - Set port type to Ethernet
6329  *
6330  *      @devlink_port: devlink port
6331  *      @netdev: related netdevice
6332  */
6333 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
6334                                struct net_device *netdev)
6335 {
6336         const struct net_device_ops *ops = netdev->netdev_ops;
6337
6338         /* If driver registers devlink port, it should set devlink port
6339          * attributes accordingly so the compat functions are called
6340          * and the original ops are not used.
6341          */
6342         if (ops->ndo_get_phys_port_name) {
6343                 /* Some drivers use the same set of ndos for netdevs
6344                  * that have devlink_port registered and also for
6345                  * those who don't. Make sure that ndo_get_phys_port_name
6346                  * returns -EOPNOTSUPP here in case it is defined.
6347                  * Warn if not.
6348                  */
6349                 char name[IFNAMSIZ];
6350                 int err;
6351
6352                 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
6353                 WARN_ON(err != -EOPNOTSUPP);
6354         }
6355         if (ops->ndo_get_port_parent_id) {
6356                 /* Some drivers use the same set of ndos for netdevs
6357                  * that have devlink_port registered and also for
6358                  * those who don't. Make sure that ndo_get_port_parent_id
6359                  * returns -EOPNOTSUPP here in case it is defined.
6360                  * Warn if not.
6361                  */
6362                 struct netdev_phys_item_id ppid;
6363                 int err;
6364
6365                 err = ops->ndo_get_port_parent_id(netdev, &ppid);
6366                 WARN_ON(err != -EOPNOTSUPP);
6367         }
6368         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, netdev);
6369 }
6370 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
6371
6372 /**
6373  *      devlink_port_type_ib_set - Set port type to InfiniBand
6374  *
6375  *      @devlink_port: devlink port
6376  *      @ibdev: related IB device
6377  */
6378 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
6379                               struct ib_device *ibdev)
6380 {
6381         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
6382 }
6383 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
6384
6385 /**
6386  *      devlink_port_type_clear - Clear port type
6387  *
6388  *      @devlink_port: devlink port
6389  */
6390 void devlink_port_type_clear(struct devlink_port *devlink_port)
6391 {
6392         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
6393         devlink_port_type_warn_schedule(devlink_port);
6394 }
6395 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
6396
6397 static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
6398                                     enum devlink_port_flavour flavour,
6399                                     const unsigned char *switch_id,
6400                                     unsigned char switch_id_len)
6401 {
6402         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6403
6404         if (WARN_ON(devlink_port->registered))
6405                 return -EEXIST;
6406         attrs->set = true;
6407         attrs->flavour = flavour;
6408         if (switch_id) {
6409                 attrs->switch_port = true;
6410                 if (WARN_ON(switch_id_len > MAX_PHYS_ITEM_ID_LEN))
6411                         switch_id_len = MAX_PHYS_ITEM_ID_LEN;
6412                 memcpy(attrs->switch_id.id, switch_id, switch_id_len);
6413                 attrs->switch_id.id_len = switch_id_len;
6414         } else {
6415                 attrs->switch_port = false;
6416         }
6417         return 0;
6418 }
6419
6420 /**
6421  *      devlink_port_attrs_set - Set port attributes
6422  *
6423  *      @devlink_port: devlink port
6424  *      @flavour: flavour of the port
6425  *      @port_number: number of the port that is facing user, for example
6426  *                    the front panel port number
6427  *      @split: indicates if this is split port
6428  *      @split_subport_number: if the port is split, this is the number
6429  *                             of subport.
6430  *      @switch_id: if the port is part of switch, this is buffer with ID,
6431  *                  otwerwise this is NULL
6432  *      @switch_id_len: length of the switch_id buffer
6433  */
6434 void devlink_port_attrs_set(struct devlink_port *devlink_port,
6435                             enum devlink_port_flavour flavour,
6436                             u32 port_number, bool split,
6437                             u32 split_subport_number,
6438                             const unsigned char *switch_id,
6439                             unsigned char switch_id_len)
6440 {
6441         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6442         int ret;
6443
6444         ret = __devlink_port_attrs_set(devlink_port, flavour,
6445                                        switch_id, switch_id_len);
6446         if (ret)
6447                 return;
6448         attrs->split = split;
6449         attrs->phys.port_number = port_number;
6450         attrs->phys.split_subport_number = split_subport_number;
6451 }
6452 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
6453
6454 /**
6455  *      devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
6456  *
6457  *      @devlink_port: devlink port
6458  *      @pf: associated PF for the devlink port instance
6459  *      @switch_id: if the port is part of switch, this is buffer with ID,
6460  *                  otherwise this is NULL
6461  *      @switch_id_len: length of the switch_id buffer
6462  */
6463 void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port,
6464                                    const unsigned char *switch_id,
6465                                    unsigned char switch_id_len, u16 pf)
6466 {
6467         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6468         int ret;
6469
6470         ret = __devlink_port_attrs_set(devlink_port,
6471                                        DEVLINK_PORT_FLAVOUR_PCI_PF,
6472                                        switch_id, switch_id_len);
6473         if (ret)
6474                 return;
6475
6476         attrs->pci_pf.pf = pf;
6477 }
6478 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
6479
6480 /**
6481  *      devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
6482  *
6483  *      @devlink_port: devlink port
6484  *      @pf: associated PF for the devlink port instance
6485  *      @vf: associated VF of a PF for the devlink port instance
6486  *      @switch_id: if the port is part of switch, this is buffer with ID,
6487  *                  otherwise this is NULL
6488  *      @switch_id_len: length of the switch_id buffer
6489  */
6490 void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port,
6491                                    const unsigned char *switch_id,
6492                                    unsigned char switch_id_len,
6493                                    u16 pf, u16 vf)
6494 {
6495         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6496         int ret;
6497
6498         ret = __devlink_port_attrs_set(devlink_port,
6499                                        DEVLINK_PORT_FLAVOUR_PCI_VF,
6500                                        switch_id, switch_id_len);
6501         if (ret)
6502                 return;
6503         attrs->pci_vf.pf = pf;
6504         attrs->pci_vf.vf = vf;
6505 }
6506 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
6507
6508 static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
6509                                              char *name, size_t len)
6510 {
6511         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6512         int n = 0;
6513
6514         if (!attrs->set)
6515                 return -EOPNOTSUPP;
6516
6517         switch (attrs->flavour) {
6518         case DEVLINK_PORT_FLAVOUR_PHYSICAL:
6519                 if (!attrs->split)
6520                         n = snprintf(name, len, "p%u", attrs->phys.port_number);
6521                 else
6522                         n = snprintf(name, len, "p%us%u",
6523                                      attrs->phys.port_number,
6524                                      attrs->phys.split_subport_number);
6525                 break;
6526         case DEVLINK_PORT_FLAVOUR_CPU:
6527         case DEVLINK_PORT_FLAVOUR_DSA:
6528                 /* As CPU and DSA ports do not have a netdevice associated
6529                  * case should not ever happen.
6530                  */
6531                 WARN_ON(1);
6532                 return -EINVAL;
6533         case DEVLINK_PORT_FLAVOUR_PCI_PF:
6534                 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
6535                 break;
6536         case DEVLINK_PORT_FLAVOUR_PCI_VF:
6537                 n = snprintf(name, len, "pf%uvf%u",
6538                              attrs->pci_vf.pf, attrs->pci_vf.vf);
6539                 break;
6540         }
6541
6542         if (n >= len)
6543                 return -EINVAL;
6544
6545         return 0;
6546 }
6547
6548 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
6549                         u32 size, u16 ingress_pools_count,
6550                         u16 egress_pools_count, u16 ingress_tc_count,
6551                         u16 egress_tc_count)
6552 {
6553         struct devlink_sb *devlink_sb;
6554         int err = 0;
6555
6556         mutex_lock(&devlink->lock);
6557         if (devlink_sb_index_exists(devlink, sb_index)) {
6558                 err = -EEXIST;
6559                 goto unlock;
6560         }
6561
6562         devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
6563         if (!devlink_sb) {
6564                 err = -ENOMEM;
6565                 goto unlock;
6566         }
6567         devlink_sb->index = sb_index;
6568         devlink_sb->size = size;
6569         devlink_sb->ingress_pools_count = ingress_pools_count;
6570         devlink_sb->egress_pools_count = egress_pools_count;
6571         devlink_sb->ingress_tc_count = ingress_tc_count;
6572         devlink_sb->egress_tc_count = egress_tc_count;
6573         list_add_tail(&devlink_sb->list, &devlink->sb_list);
6574 unlock:
6575         mutex_unlock(&devlink->lock);
6576         return err;
6577 }
6578 EXPORT_SYMBOL_GPL(devlink_sb_register);
6579
6580 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
6581 {
6582         struct devlink_sb *devlink_sb;
6583
6584         mutex_lock(&devlink->lock);
6585         devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
6586         WARN_ON(!devlink_sb);
6587         list_del(&devlink_sb->list);
6588         mutex_unlock(&devlink->lock);
6589         kfree(devlink_sb);
6590 }
6591 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
6592
6593 /**
6594  *      devlink_dpipe_headers_register - register dpipe headers
6595  *
6596  *      @devlink: devlink
6597  *      @dpipe_headers: dpipe header array
6598  *
6599  *      Register the headers supported by hardware.
6600  */
6601 int devlink_dpipe_headers_register(struct devlink *devlink,
6602                                    struct devlink_dpipe_headers *dpipe_headers)
6603 {
6604         mutex_lock(&devlink->lock);
6605         devlink->dpipe_headers = dpipe_headers;
6606         mutex_unlock(&devlink->lock);
6607         return 0;
6608 }
6609 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
6610
6611 /**
6612  *      devlink_dpipe_headers_unregister - unregister dpipe headers
6613  *
6614  *      @devlink: devlink
6615  *
6616  *      Unregister the headers supported by hardware.
6617  */
6618 void devlink_dpipe_headers_unregister(struct devlink *devlink)
6619 {
6620         mutex_lock(&devlink->lock);
6621         devlink->dpipe_headers = NULL;
6622         mutex_unlock(&devlink->lock);
6623 }
6624 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
6625
6626 /**
6627  *      devlink_dpipe_table_counter_enabled - check if counter allocation
6628  *                                            required
6629  *      @devlink: devlink
6630  *      @table_name: tables name
6631  *
6632  *      Used by driver to check if counter allocation is required.
6633  *      After counter allocation is turned on the table entries
6634  *      are updated to include counter statistics.
6635  *
6636  *      After that point on the driver must respect the counter
6637  *      state so that each entry added to the table is added
6638  *      with a counter.
6639  */
6640 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
6641                                          const char *table_name)
6642 {
6643         struct devlink_dpipe_table *table;
6644         bool enabled;
6645
6646         rcu_read_lock();
6647         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
6648                                          table_name);
6649         enabled = false;
6650         if (table)
6651                 enabled = table->counters_enabled;
6652         rcu_read_unlock();
6653         return enabled;
6654 }
6655 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
6656
6657 /**
6658  *      devlink_dpipe_table_register - register dpipe table
6659  *
6660  *      @devlink: devlink
6661  *      @table_name: table name
6662  *      @table_ops: table ops
6663  *      @priv: priv
6664  *      @counter_control_extern: external control for counters
6665  */
6666 int devlink_dpipe_table_register(struct devlink *devlink,
6667                                  const char *table_name,
6668                                  struct devlink_dpipe_table_ops *table_ops,
6669                                  void *priv, bool counter_control_extern)
6670 {
6671         struct devlink_dpipe_table *table;
6672
6673         if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name))
6674                 return -EEXIST;
6675
6676         if (WARN_ON(!table_ops->size_get))
6677                 return -EINVAL;
6678
6679         table = kzalloc(sizeof(*table), GFP_KERNEL);
6680         if (!table)
6681                 return -ENOMEM;
6682
6683         table->name = table_name;
6684         table->table_ops = table_ops;
6685         table->priv = priv;
6686         table->counter_control_extern = counter_control_extern;
6687
6688         mutex_lock(&devlink->lock);
6689         list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
6690         mutex_unlock(&devlink->lock);
6691         return 0;
6692 }
6693 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
6694
6695 /**
6696  *      devlink_dpipe_table_unregister - unregister dpipe table
6697  *
6698  *      @devlink: devlink
6699  *      @table_name: table name
6700  */
6701 void devlink_dpipe_table_unregister(struct devlink *devlink,
6702                                     const char *table_name)
6703 {
6704         struct devlink_dpipe_table *table;
6705
6706         mutex_lock(&devlink->lock);
6707         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
6708                                          table_name);
6709         if (!table)
6710                 goto unlock;
6711         list_del_rcu(&table->list);
6712         mutex_unlock(&devlink->lock);
6713         kfree_rcu(table, rcu);
6714         return;
6715 unlock:
6716         mutex_unlock(&devlink->lock);
6717 }
6718 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
6719
6720 /**
6721  *      devlink_resource_register - devlink resource register
6722  *
6723  *      @devlink: devlink
6724  *      @resource_name: resource's name
6725  *      @resource_size: resource's size
6726  *      @resource_id: resource's id
6727  *      @parent_resource_id: resource's parent id
6728  *      @size_params: size parameters
6729  */
6730 int devlink_resource_register(struct devlink *devlink,
6731                               const char *resource_name,
6732                               u64 resource_size,
6733                               u64 resource_id,
6734                               u64 parent_resource_id,
6735                               const struct devlink_resource_size_params *size_params)
6736 {
6737         struct devlink_resource *resource;
6738         struct list_head *resource_list;
6739         bool top_hierarchy;
6740         int err = 0;
6741
6742         top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
6743
6744         mutex_lock(&devlink->lock);
6745         resource = devlink_resource_find(devlink, NULL, resource_id);
6746         if (resource) {
6747                 err = -EINVAL;
6748                 goto out;
6749         }
6750
6751         resource = kzalloc(sizeof(*resource), GFP_KERNEL);
6752         if (!resource) {
6753                 err = -ENOMEM;
6754                 goto out;
6755         }
6756
6757         if (top_hierarchy) {
6758                 resource_list = &devlink->resource_list;
6759         } else {
6760                 struct devlink_resource *parent_resource;
6761
6762                 parent_resource = devlink_resource_find(devlink, NULL,
6763                                                         parent_resource_id);
6764                 if (parent_resource) {
6765                         resource_list = &parent_resource->resource_list;
6766                         resource->parent = parent_resource;
6767                 } else {
6768                         kfree(resource);
6769                         err = -EINVAL;
6770                         goto out;
6771                 }
6772         }
6773
6774         resource->name = resource_name;
6775         resource->size = resource_size;
6776         resource->size_new = resource_size;
6777         resource->id = resource_id;
6778         resource->size_valid = true;
6779         memcpy(&resource->size_params, size_params,
6780                sizeof(resource->size_params));
6781         INIT_LIST_HEAD(&resource->resource_list);
6782         list_add_tail(&resource->list, resource_list);
6783 out:
6784         mutex_unlock(&devlink->lock);
6785         return err;
6786 }
6787 EXPORT_SYMBOL_GPL(devlink_resource_register);
6788
6789 /**
6790  *      devlink_resources_unregister - free all resources
6791  *
6792  *      @devlink: devlink
6793  *      @resource: resource
6794  */
6795 void devlink_resources_unregister(struct devlink *devlink,
6796                                   struct devlink_resource *resource)
6797 {
6798         struct devlink_resource *tmp, *child_resource;
6799         struct list_head *resource_list;
6800
6801         if (resource)
6802                 resource_list = &resource->resource_list;
6803         else
6804                 resource_list = &devlink->resource_list;
6805
6806         if (!resource)
6807                 mutex_lock(&devlink->lock);
6808
6809         list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
6810                 devlink_resources_unregister(devlink, child_resource);
6811                 list_del(&child_resource->list);
6812                 kfree(child_resource);
6813         }
6814
6815         if (!resource)
6816                 mutex_unlock(&devlink->lock);
6817 }
6818 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
6819
6820 /**
6821  *      devlink_resource_size_get - get and update size
6822  *
6823  *      @devlink: devlink
6824  *      @resource_id: the requested resource id
6825  *      @p_resource_size: ptr to update
6826  */
6827 int devlink_resource_size_get(struct devlink *devlink,
6828                               u64 resource_id,
6829                               u64 *p_resource_size)
6830 {
6831         struct devlink_resource *resource;
6832         int err = 0;
6833
6834         mutex_lock(&devlink->lock);
6835         resource = devlink_resource_find(devlink, NULL, resource_id);
6836         if (!resource) {
6837                 err = -EINVAL;
6838                 goto out;
6839         }
6840         *p_resource_size = resource->size_new;
6841         resource->size = resource->size_new;
6842 out:
6843         mutex_unlock(&devlink->lock);
6844         return err;
6845 }
6846 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
6847
6848 /**
6849  *      devlink_dpipe_table_resource_set - set the resource id
6850  *
6851  *      @devlink: devlink
6852  *      @table_name: table name
6853  *      @resource_id: resource id
6854  *      @resource_units: number of resource's units consumed per table's entry
6855  */
6856 int devlink_dpipe_table_resource_set(struct devlink *devlink,
6857                                      const char *table_name, u64 resource_id,
6858                                      u64 resource_units)
6859 {
6860         struct devlink_dpipe_table *table;
6861         int err = 0;
6862
6863         mutex_lock(&devlink->lock);
6864         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
6865                                          table_name);
6866         if (!table) {
6867                 err = -EINVAL;
6868                 goto out;
6869         }
6870         table->resource_id = resource_id;
6871         table->resource_units = resource_units;
6872         table->resource_valid = true;
6873 out:
6874         mutex_unlock(&devlink->lock);
6875         return err;
6876 }
6877 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
6878
6879 /**
6880  *      devlink_resource_occ_get_register - register occupancy getter
6881  *
6882  *      @devlink: devlink
6883  *      @resource_id: resource id
6884  *      @occ_get: occupancy getter callback
6885  *      @occ_get_priv: occupancy getter callback priv
6886  */
6887 void devlink_resource_occ_get_register(struct devlink *devlink,
6888                                        u64 resource_id,
6889                                        devlink_resource_occ_get_t *occ_get,
6890                                        void *occ_get_priv)
6891 {
6892         struct devlink_resource *resource;
6893
6894         mutex_lock(&devlink->lock);
6895         resource = devlink_resource_find(devlink, NULL, resource_id);
6896         if (WARN_ON(!resource))
6897                 goto out;
6898         WARN_ON(resource->occ_get);
6899
6900         resource->occ_get = occ_get;
6901         resource->occ_get_priv = occ_get_priv;
6902 out:
6903         mutex_unlock(&devlink->lock);
6904 }
6905 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
6906
6907 /**
6908  *      devlink_resource_occ_get_unregister - unregister occupancy getter
6909  *
6910  *      @devlink: devlink
6911  *      @resource_id: resource id
6912  */
6913 void devlink_resource_occ_get_unregister(struct devlink *devlink,
6914                                          u64 resource_id)
6915 {
6916         struct devlink_resource *resource;
6917
6918         mutex_lock(&devlink->lock);
6919         resource = devlink_resource_find(devlink, NULL, resource_id);
6920         if (WARN_ON(!resource))
6921                 goto out;
6922         WARN_ON(!resource->occ_get);
6923
6924         resource->occ_get = NULL;
6925         resource->occ_get_priv = NULL;
6926 out:
6927         mutex_unlock(&devlink->lock);
6928 }
6929 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
6930
6931 static int devlink_param_verify(const struct devlink_param *param)
6932 {
6933         if (!param || !param->name || !param->supported_cmodes)
6934                 return -EINVAL;
6935         if (param->generic)
6936                 return devlink_param_generic_verify(param);
6937         else
6938                 return devlink_param_driver_verify(param);
6939 }
6940
6941 static int __devlink_params_register(struct devlink *devlink,
6942                                      unsigned int port_index,
6943                                      struct list_head *param_list,
6944                                      const struct devlink_param *params,
6945                                      size_t params_count,
6946                                      enum devlink_command reg_cmd,
6947                                      enum devlink_command unreg_cmd)
6948 {
6949         const struct devlink_param *param = params;
6950         int i;
6951         int err;
6952
6953         mutex_lock(&devlink->lock);
6954         for (i = 0; i < params_count; i++, param++) {
6955                 err = devlink_param_verify(param);
6956                 if (err)
6957                         goto rollback;
6958
6959                 err = devlink_param_register_one(devlink, port_index,
6960                                                  param_list, param, reg_cmd);
6961                 if (err)
6962                         goto rollback;
6963         }
6964
6965         mutex_unlock(&devlink->lock);
6966         return 0;
6967
6968 rollback:
6969         if (!i)
6970                 goto unlock;
6971         for (param--; i > 0; i--, param--)
6972                 devlink_param_unregister_one(devlink, port_index, param_list,
6973                                              param, unreg_cmd);
6974 unlock:
6975         mutex_unlock(&devlink->lock);
6976         return err;
6977 }
6978
6979 static void __devlink_params_unregister(struct devlink *devlink,
6980                                         unsigned int port_index,
6981                                         struct list_head *param_list,
6982                                         const struct devlink_param *params,
6983                                         size_t params_count,
6984                                         enum devlink_command cmd)
6985 {
6986         const struct devlink_param *param = params;
6987         int i;
6988
6989         mutex_lock(&devlink->lock);
6990         for (i = 0; i < params_count; i++, param++)
6991                 devlink_param_unregister_one(devlink, 0, param_list, param,
6992                                              cmd);
6993         mutex_unlock(&devlink->lock);
6994 }
6995
6996 /**
6997  *      devlink_params_register - register configuration parameters
6998  *
6999  *      @devlink: devlink
7000  *      @params: configuration parameters array
7001  *      @params_count: number of parameters provided
7002  *
7003  *      Register the configuration parameters supported by the driver.
7004  */
7005 int devlink_params_register(struct devlink *devlink,
7006                             const struct devlink_param *params,
7007                             size_t params_count)
7008 {
7009         return __devlink_params_register(devlink, 0, &devlink->param_list,
7010                                          params, params_count,
7011                                          DEVLINK_CMD_PARAM_NEW,
7012                                          DEVLINK_CMD_PARAM_DEL);
7013 }
7014 EXPORT_SYMBOL_GPL(devlink_params_register);
7015
7016 /**
7017  *      devlink_params_unregister - unregister configuration parameters
7018  *      @devlink: devlink
7019  *      @params: configuration parameters to unregister
7020  *      @params_count: number of parameters provided
7021  */
7022 void devlink_params_unregister(struct devlink *devlink,
7023                                const struct devlink_param *params,
7024                                size_t params_count)
7025 {
7026         return __devlink_params_unregister(devlink, 0, &devlink->param_list,
7027                                            params, params_count,
7028                                            DEVLINK_CMD_PARAM_DEL);
7029 }
7030 EXPORT_SYMBOL_GPL(devlink_params_unregister);
7031
7032 /**
7033  *      devlink_params_publish - publish configuration parameters
7034  *
7035  *      @devlink: devlink
7036  *
7037  *      Publish previously registered configuration parameters.
7038  */
7039 void devlink_params_publish(struct devlink *devlink)
7040 {
7041         struct devlink_param_item *param_item;
7042
7043         list_for_each_entry(param_item, &devlink->param_list, list) {
7044                 if (param_item->published)
7045                         continue;
7046                 param_item->published = true;
7047                 devlink_param_notify(devlink, 0, param_item,
7048                                      DEVLINK_CMD_PARAM_NEW);
7049         }
7050 }
7051 EXPORT_SYMBOL_GPL(devlink_params_publish);
7052
7053 /**
7054  *      devlink_params_unpublish - unpublish configuration parameters
7055  *
7056  *      @devlink: devlink
7057  *
7058  *      Unpublish previously registered configuration parameters.
7059  */
7060 void devlink_params_unpublish(struct devlink *devlink)
7061 {
7062         struct devlink_param_item *param_item;
7063
7064         list_for_each_entry(param_item, &devlink->param_list, list) {
7065                 if (!param_item->published)
7066                         continue;
7067                 param_item->published = false;
7068                 devlink_param_notify(devlink, 0, param_item,
7069                                      DEVLINK_CMD_PARAM_DEL);
7070         }
7071 }
7072 EXPORT_SYMBOL_GPL(devlink_params_unpublish);
7073
7074 /**
7075  *      devlink_port_params_register - register port configuration parameters
7076  *
7077  *      @devlink_port: devlink port
7078  *      @params: configuration parameters array
7079  *      @params_count: number of parameters provided
7080  *
7081  *      Register the configuration parameters supported by the port.
7082  */
7083 int devlink_port_params_register(struct devlink_port *devlink_port,
7084                                  const struct devlink_param *params,
7085                                  size_t params_count)
7086 {
7087         return __devlink_params_register(devlink_port->devlink,
7088                                          devlink_port->index,
7089                                          &devlink_port->param_list, params,
7090                                          params_count,
7091                                          DEVLINK_CMD_PORT_PARAM_NEW,
7092                                          DEVLINK_CMD_PORT_PARAM_DEL);
7093 }
7094 EXPORT_SYMBOL_GPL(devlink_port_params_register);
7095
7096 /**
7097  *      devlink_port_params_unregister - unregister port configuration
7098  *      parameters
7099  *
7100  *      @devlink_port: devlink port
7101  *      @params: configuration parameters array
7102  *      @params_count: number of parameters provided
7103  */
7104 void devlink_port_params_unregister(struct devlink_port *devlink_port,
7105                                     const struct devlink_param *params,
7106                                     size_t params_count)
7107 {
7108         return __devlink_params_unregister(devlink_port->devlink,
7109                                            devlink_port->index,
7110                                            &devlink_port->param_list,
7111                                            params, params_count,
7112                                            DEVLINK_CMD_PORT_PARAM_DEL);
7113 }
7114 EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
7115
7116 static int
7117 __devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
7118                                      union devlink_param_value *init_val)
7119 {
7120         struct devlink_param_item *param_item;
7121
7122         param_item = devlink_param_find_by_id(param_list, param_id);
7123         if (!param_item)
7124                 return -EINVAL;
7125
7126         if (!param_item->driverinit_value_valid ||
7127             !devlink_param_cmode_is_supported(param_item->param,
7128                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
7129                 return -EOPNOTSUPP;
7130
7131         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
7132                 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
7133         else
7134                 *init_val = param_item->driverinit_value;
7135
7136         return 0;
7137 }
7138
7139 static int
7140 __devlink_param_driverinit_value_set(struct devlink *devlink,
7141                                      unsigned int port_index,
7142                                      struct list_head *param_list, u32 param_id,
7143                                      union devlink_param_value init_val,
7144                                      enum devlink_command cmd)
7145 {
7146         struct devlink_param_item *param_item;
7147
7148         param_item = devlink_param_find_by_id(param_list, param_id);
7149         if (!param_item)
7150                 return -EINVAL;
7151
7152         if (!devlink_param_cmode_is_supported(param_item->param,
7153                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
7154                 return -EOPNOTSUPP;
7155
7156         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
7157                 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
7158         else
7159                 param_item->driverinit_value = init_val;
7160         param_item->driverinit_value_valid = true;
7161
7162         devlink_param_notify(devlink, port_index, param_item, cmd);
7163         return 0;
7164 }
7165
7166 /**
7167  *      devlink_param_driverinit_value_get - get configuration parameter
7168  *                                           value for driver initializing
7169  *
7170  *      @devlink: devlink
7171  *      @param_id: parameter ID
7172  *      @init_val: value of parameter in driverinit configuration mode
7173  *
7174  *      This function should be used by the driver to get driverinit
7175  *      configuration for initialization after reload command.
7176  */
7177 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
7178                                        union devlink_param_value *init_val)
7179 {
7180         if (!devlink_reload_supported(devlink))
7181                 return -EOPNOTSUPP;
7182
7183         return __devlink_param_driverinit_value_get(&devlink->param_list,
7184                                                     param_id, init_val);
7185 }
7186 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
7187
7188 /**
7189  *      devlink_param_driverinit_value_set - set value of configuration
7190  *                                           parameter for driverinit
7191  *                                           configuration mode
7192  *
7193  *      @devlink: devlink
7194  *      @param_id: parameter ID
7195  *      @init_val: value of parameter to set for driverinit configuration mode
7196  *
7197  *      This function should be used by the driver to set driverinit
7198  *      configuration mode default value.
7199  */
7200 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
7201                                        union devlink_param_value init_val)
7202 {
7203         return __devlink_param_driverinit_value_set(devlink, 0,
7204                                                     &devlink->param_list,
7205                                                     param_id, init_val,
7206                                                     DEVLINK_CMD_PARAM_NEW);
7207 }
7208 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
7209
7210 /**
7211  *      devlink_port_param_driverinit_value_get - get configuration parameter
7212  *                                              value for driver initializing
7213  *
7214  *      @devlink_port: devlink_port
7215  *      @param_id: parameter ID
7216  *      @init_val: value of parameter in driverinit configuration mode
7217  *
7218  *      This function should be used by the driver to get driverinit
7219  *      configuration for initialization after reload command.
7220  */
7221 int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port,
7222                                             u32 param_id,
7223                                             union devlink_param_value *init_val)
7224 {
7225         struct devlink *devlink = devlink_port->devlink;
7226
7227         if (!devlink_reload_supported(devlink))
7228                 return -EOPNOTSUPP;
7229
7230         return __devlink_param_driverinit_value_get(&devlink_port->param_list,
7231                                                     param_id, init_val);
7232 }
7233 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get);
7234
7235 /**
7236  *     devlink_port_param_driverinit_value_set - set value of configuration
7237  *                                               parameter for driverinit
7238  *                                               configuration mode
7239  *
7240  *     @devlink_port: devlink_port
7241  *     @param_id: parameter ID
7242  *     @init_val: value of parameter to set for driverinit configuration mode
7243  *
7244  *     This function should be used by the driver to set driverinit
7245  *     configuration mode default value.
7246  */
7247 int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
7248                                             u32 param_id,
7249                                             union devlink_param_value init_val)
7250 {
7251         return __devlink_param_driverinit_value_set(devlink_port->devlink,
7252                                                     devlink_port->index,
7253                                                     &devlink_port->param_list,
7254                                                     param_id, init_val,
7255                                                     DEVLINK_CMD_PORT_PARAM_NEW);
7256 }
7257 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
7258
7259 /**
7260  *      devlink_param_value_changed - notify devlink on a parameter's value
7261  *                                    change. Should be called by the driver
7262  *                                    right after the change.
7263  *
7264  *      @devlink: devlink
7265  *      @param_id: parameter ID
7266  *
7267  *      This function should be used by the driver to notify devlink on value
7268  *      change, excluding driverinit configuration mode.
7269  *      For driverinit configuration mode driver should use the function
7270  */
7271 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
7272 {
7273         struct devlink_param_item *param_item;
7274
7275         param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
7276         WARN_ON(!param_item);
7277
7278         devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
7279 }
7280 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
7281
7282 /**
7283  *     devlink_port_param_value_changed - notify devlink on a parameter's value
7284  *                                      change. Should be called by the driver
7285  *                                      right after the change.
7286  *
7287  *     @devlink_port: devlink_port
7288  *     @param_id: parameter ID
7289  *
7290  *     This function should be used by the driver to notify devlink on value
7291  *     change, excluding driverinit configuration mode.
7292  *     For driverinit configuration mode driver should use the function
7293  *     devlink_port_param_driverinit_value_set() instead.
7294  */
7295 void devlink_port_param_value_changed(struct devlink_port *devlink_port,
7296                                       u32 param_id)
7297 {
7298         struct devlink_param_item *param_item;
7299
7300         param_item = devlink_param_find_by_id(&devlink_port->param_list,
7301                                               param_id);
7302         WARN_ON(!param_item);
7303
7304         devlink_param_notify(devlink_port->devlink, devlink_port->index,
7305                              param_item, DEVLINK_CMD_PORT_PARAM_NEW);
7306 }
7307 EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
7308
7309 /**
7310  *      devlink_param_value_str_fill - Safely fill-up the string preventing
7311  *                                     from overflow of the preallocated buffer
7312  *
7313  *      @dst_val: destination devlink_param_value
7314  *      @src: source buffer
7315  */
7316 void devlink_param_value_str_fill(union devlink_param_value *dst_val,
7317                                   const char *src)
7318 {
7319         size_t len;
7320
7321         len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
7322         WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
7323 }
7324 EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
7325
7326 /**
7327  *      devlink_region_create - create a new address region
7328  *
7329  *      @devlink: devlink
7330  *      @region_name: region name
7331  *      @region_max_snapshots: Maximum supported number of snapshots for region
7332  *      @region_size: size of region
7333  */
7334 struct devlink_region *devlink_region_create(struct devlink *devlink,
7335                                              const char *region_name,
7336                                              u32 region_max_snapshots,
7337                                              u64 region_size)
7338 {
7339         struct devlink_region *region;
7340         int err = 0;
7341
7342         mutex_lock(&devlink->lock);
7343
7344         if (devlink_region_get_by_name(devlink, region_name)) {
7345                 err = -EEXIST;
7346                 goto unlock;
7347         }
7348
7349         region = kzalloc(sizeof(*region), GFP_KERNEL);
7350         if (!region) {
7351                 err = -ENOMEM;
7352                 goto unlock;
7353         }
7354
7355         region->devlink = devlink;
7356         region->max_snapshots = region_max_snapshots;
7357         region->name = region_name;
7358         region->size = region_size;
7359         INIT_LIST_HEAD(&region->snapshot_list);
7360         list_add_tail(&region->list, &devlink->region_list);
7361         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
7362
7363         mutex_unlock(&devlink->lock);
7364         return region;
7365
7366 unlock:
7367         mutex_unlock(&devlink->lock);
7368         return ERR_PTR(err);
7369 }
7370 EXPORT_SYMBOL_GPL(devlink_region_create);
7371
7372 /**
7373  *      devlink_region_destroy - destroy address region
7374  *
7375  *      @region: devlink region to destroy
7376  */
7377 void devlink_region_destroy(struct devlink_region *region)
7378 {
7379         struct devlink *devlink = region->devlink;
7380         struct devlink_snapshot *snapshot, *ts;
7381
7382         mutex_lock(&devlink->lock);
7383
7384         /* Free all snapshots of region */
7385         list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
7386                 devlink_region_snapshot_del(region, snapshot);
7387
7388         list_del(&region->list);
7389
7390         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
7391         mutex_unlock(&devlink->lock);
7392         kfree(region);
7393 }
7394 EXPORT_SYMBOL_GPL(devlink_region_destroy);
7395
7396 /**
7397  *      devlink_region_shapshot_id_get - get snapshot ID
7398  *
7399  *      This callback should be called when adding a new snapshot,
7400  *      Driver should use the same id for multiple snapshots taken
7401  *      on multiple regions at the same time/by the same trigger.
7402  *
7403  *      @devlink: devlink
7404  */
7405 u32 devlink_region_shapshot_id_get(struct devlink *devlink)
7406 {
7407         u32 id;
7408
7409         mutex_lock(&devlink->lock);
7410         id = ++devlink->snapshot_id;
7411         mutex_unlock(&devlink->lock);
7412
7413         return id;
7414 }
7415 EXPORT_SYMBOL_GPL(devlink_region_shapshot_id_get);
7416
7417 /**
7418  *      devlink_region_snapshot_create - create a new snapshot
7419  *      This will add a new snapshot of a region. The snapshot
7420  *      will be stored on the region struct and can be accessed
7421  *      from devlink. This is useful for future analyses of snapshots.
7422  *      Multiple snapshots can be created on a region.
7423  *      The @snapshot_id should be obtained using the getter function.
7424  *
7425  *      @region: devlink region of the snapshot
7426  *      @data: snapshot data
7427  *      @snapshot_id: snapshot id to be created
7428  *      @data_destructor: pointer to destructor function to free data
7429  */
7430 int devlink_region_snapshot_create(struct devlink_region *region,
7431                                    u8 *data, u32 snapshot_id,
7432                                    devlink_snapshot_data_dest_t *data_destructor)
7433 {
7434         struct devlink *devlink = region->devlink;
7435         struct devlink_snapshot *snapshot;
7436         int err;
7437
7438         mutex_lock(&devlink->lock);
7439
7440         /* check if region can hold one more snapshot */
7441         if (region->cur_snapshots == region->max_snapshots) {
7442                 err = -ENOMEM;
7443                 goto unlock;
7444         }
7445
7446         if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
7447                 err = -EEXIST;
7448                 goto unlock;
7449         }
7450
7451         snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
7452         if (!snapshot) {
7453                 err = -ENOMEM;
7454                 goto unlock;
7455         }
7456
7457         snapshot->id = snapshot_id;
7458         snapshot->region = region;
7459         snapshot->data = data;
7460         snapshot->data_destructor = data_destructor;
7461
7462         list_add_tail(&snapshot->list, &region->snapshot_list);
7463
7464         region->cur_snapshots++;
7465
7466         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
7467         mutex_unlock(&devlink->lock);
7468         return 0;
7469
7470 unlock:
7471         mutex_unlock(&devlink->lock);
7472         return err;
7473 }
7474 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
7475
7476 #define DEVLINK_TRAP(_id, _type)                                              \
7477         {                                                                     \
7478                 .type = DEVLINK_TRAP_TYPE_##_type,                            \
7479                 .id = DEVLINK_TRAP_GENERIC_ID_##_id,                          \
7480                 .name = DEVLINK_TRAP_GENERIC_NAME_##_id,                      \
7481         }
7482
7483 static const struct devlink_trap devlink_trap_generic[] = {
7484         DEVLINK_TRAP(SMAC_MC, DROP),
7485         DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
7486         DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
7487         DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
7488         DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
7489         DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
7490         DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
7491         DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
7492         DEVLINK_TRAP(TAIL_DROP, DROP),
7493 };
7494
7495 #define DEVLINK_TRAP_GROUP(_id)                                               \
7496         {                                                                     \
7497                 .id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id,                    \
7498                 .name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id,                \
7499         }
7500
7501 static const struct devlink_trap_group devlink_trap_group_generic[] = {
7502         DEVLINK_TRAP_GROUP(L2_DROPS),
7503         DEVLINK_TRAP_GROUP(L3_DROPS),
7504         DEVLINK_TRAP_GROUP(BUFFER_DROPS),
7505 };
7506
7507 static int devlink_trap_generic_verify(const struct devlink_trap *trap)
7508 {
7509         if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
7510                 return -EINVAL;
7511
7512         if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
7513                 return -EINVAL;
7514
7515         if (trap->type != devlink_trap_generic[trap->id].type)
7516                 return -EINVAL;
7517
7518         return 0;
7519 }
7520
7521 static int devlink_trap_driver_verify(const struct devlink_trap *trap)
7522 {
7523         int i;
7524
7525         if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
7526                 return -EINVAL;
7527
7528         for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
7529                 if (!strcmp(trap->name, devlink_trap_generic[i].name))
7530                         return -EEXIST;
7531         }
7532
7533         return 0;
7534 }
7535
7536 static int devlink_trap_verify(const struct devlink_trap *trap)
7537 {
7538         if (!trap || !trap->name || !trap->group.name)
7539                 return -EINVAL;
7540
7541         if (trap->generic)
7542                 return devlink_trap_generic_verify(trap);
7543         else
7544                 return devlink_trap_driver_verify(trap);
7545 }
7546
7547 static int
7548 devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
7549 {
7550         if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
7551                 return -EINVAL;
7552
7553         if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
7554                 return -EINVAL;
7555
7556         return 0;
7557 }
7558
7559 static int
7560 devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
7561 {
7562         int i;
7563
7564         if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
7565                 return -EINVAL;
7566
7567         for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
7568                 if (!strcmp(group->name, devlink_trap_group_generic[i].name))
7569                         return -EEXIST;
7570         }
7571
7572         return 0;
7573 }
7574
7575 static int devlink_trap_group_verify(const struct devlink_trap_group *group)
7576 {
7577         if (group->generic)
7578                 return devlink_trap_group_generic_verify(group);
7579         else
7580                 return devlink_trap_group_driver_verify(group);
7581 }
7582
7583 static void
7584 devlink_trap_group_notify(struct devlink *devlink,
7585                           const struct devlink_trap_group_item *group_item,
7586                           enum devlink_command cmd)
7587 {
7588         struct sk_buff *msg;
7589         int err;
7590
7591         WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
7592                      cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
7593
7594         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7595         if (!msg)
7596                 return;
7597
7598         err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
7599                                          0);
7600         if (err) {
7601                 nlmsg_free(msg);
7602                 return;
7603         }
7604
7605         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
7606                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
7607 }
7608
7609 static struct devlink_trap_group_item *
7610 devlink_trap_group_item_create(struct devlink *devlink,
7611                                const struct devlink_trap_group *group)
7612 {
7613         struct devlink_trap_group_item *group_item;
7614         int err;
7615
7616         err = devlink_trap_group_verify(group);
7617         if (err)
7618                 return ERR_PTR(err);
7619
7620         group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
7621         if (!group_item)
7622                 return ERR_PTR(-ENOMEM);
7623
7624         group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
7625         if (!group_item->stats) {
7626                 err = -ENOMEM;
7627                 goto err_stats_alloc;
7628         }
7629
7630         group_item->group = group;
7631         refcount_set(&group_item->refcount, 1);
7632
7633         if (devlink->ops->trap_group_init) {
7634                 err = devlink->ops->trap_group_init(devlink, group);
7635                 if (err)
7636                         goto err_group_init;
7637         }
7638
7639         list_add_tail(&group_item->list, &devlink->trap_group_list);
7640         devlink_trap_group_notify(devlink, group_item,
7641                                   DEVLINK_CMD_TRAP_GROUP_NEW);
7642
7643         return group_item;
7644
7645 err_group_init:
7646         free_percpu(group_item->stats);
7647 err_stats_alloc:
7648         kfree(group_item);
7649         return ERR_PTR(err);
7650 }
7651
7652 static void
7653 devlink_trap_group_item_destroy(struct devlink *devlink,
7654                                 struct devlink_trap_group_item *group_item)
7655 {
7656         devlink_trap_group_notify(devlink, group_item,
7657                                   DEVLINK_CMD_TRAP_GROUP_DEL);
7658         list_del(&group_item->list);
7659         free_percpu(group_item->stats);
7660         kfree(group_item);
7661 }
7662
7663 static struct devlink_trap_group_item *
7664 devlink_trap_group_item_get(struct devlink *devlink,
7665                             const struct devlink_trap_group *group)
7666 {
7667         struct devlink_trap_group_item *group_item;
7668
7669         group_item = devlink_trap_group_item_lookup(devlink, group->name);
7670         if (group_item) {
7671                 refcount_inc(&group_item->refcount);
7672                 return group_item;
7673         }
7674
7675         return devlink_trap_group_item_create(devlink, group);
7676 }
7677
7678 static void
7679 devlink_trap_group_item_put(struct devlink *devlink,
7680                             struct devlink_trap_group_item *group_item)
7681 {
7682         if (!refcount_dec_and_test(&group_item->refcount))
7683                 return;
7684
7685         devlink_trap_group_item_destroy(devlink, group_item);
7686 }
7687
7688 static int
7689 devlink_trap_item_group_link(struct devlink *devlink,
7690                              struct devlink_trap_item *trap_item)
7691 {
7692         struct devlink_trap_group_item *group_item;
7693
7694         group_item = devlink_trap_group_item_get(devlink,
7695                                                  &trap_item->trap->group);
7696         if (IS_ERR(group_item))
7697                 return PTR_ERR(group_item);
7698
7699         trap_item->group_item = group_item;
7700
7701         return 0;
7702 }
7703
7704 static void
7705 devlink_trap_item_group_unlink(struct devlink *devlink,
7706                                struct devlink_trap_item *trap_item)
7707 {
7708         devlink_trap_group_item_put(devlink, trap_item->group_item);
7709 }
7710
7711 static void devlink_trap_notify(struct devlink *devlink,
7712                                 const struct devlink_trap_item *trap_item,
7713                                 enum devlink_command cmd)
7714 {
7715         struct sk_buff *msg;
7716         int err;
7717
7718         WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
7719                      cmd != DEVLINK_CMD_TRAP_DEL);
7720
7721         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7722         if (!msg)
7723                 return;
7724
7725         err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
7726         if (err) {
7727                 nlmsg_free(msg);
7728                 return;
7729         }
7730
7731         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
7732                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
7733 }
7734
7735 static int
7736 devlink_trap_register(struct devlink *devlink,
7737                       const struct devlink_trap *trap, void *priv)
7738 {
7739         struct devlink_trap_item *trap_item;
7740         int err;
7741
7742         if (devlink_trap_item_lookup(devlink, trap->name))
7743                 return -EEXIST;
7744
7745         trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
7746         if (!trap_item)
7747                 return -ENOMEM;
7748
7749         trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
7750         if (!trap_item->stats) {
7751                 err = -ENOMEM;
7752                 goto err_stats_alloc;
7753         }
7754
7755         trap_item->trap = trap;
7756         trap_item->action = trap->init_action;
7757         trap_item->priv = priv;
7758
7759         err = devlink_trap_item_group_link(devlink, trap_item);
7760         if (err)
7761                 goto err_group_link;
7762
7763         err = devlink->ops->trap_init(devlink, trap, trap_item);
7764         if (err)
7765                 goto err_trap_init;
7766
7767         list_add_tail(&trap_item->list, &devlink->trap_list);
7768         devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
7769
7770         return 0;
7771
7772 err_trap_init:
7773         devlink_trap_item_group_unlink(devlink, trap_item);
7774 err_group_link:
7775         free_percpu(trap_item->stats);
7776 err_stats_alloc:
7777         kfree(trap_item);
7778         return err;
7779 }
7780
7781 static void devlink_trap_unregister(struct devlink *devlink,
7782                                     const struct devlink_trap *trap)
7783 {
7784         struct devlink_trap_item *trap_item;
7785
7786         trap_item = devlink_trap_item_lookup(devlink, trap->name);
7787         if (WARN_ON_ONCE(!trap_item))
7788                 return;
7789
7790         devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
7791         list_del(&trap_item->list);
7792         if (devlink->ops->trap_fini)
7793                 devlink->ops->trap_fini(devlink, trap, trap_item);
7794         devlink_trap_item_group_unlink(devlink, trap_item);
7795         free_percpu(trap_item->stats);
7796         kfree(trap_item);
7797 }
7798
7799 static void devlink_trap_disable(struct devlink *devlink,
7800                                  const struct devlink_trap *trap)
7801 {
7802         struct devlink_trap_item *trap_item;
7803
7804         trap_item = devlink_trap_item_lookup(devlink, trap->name);
7805         if (WARN_ON_ONCE(!trap_item))
7806                 return;
7807
7808         devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP);
7809         trap_item->action = DEVLINK_TRAP_ACTION_DROP;
7810 }
7811
7812 /**
7813  * devlink_traps_register - Register packet traps with devlink.
7814  * @devlink: devlink.
7815  * @traps: Packet traps.
7816  * @traps_count: Count of provided packet traps.
7817  * @priv: Driver private information.
7818  *
7819  * Return: Non-zero value on failure.
7820  */
7821 int devlink_traps_register(struct devlink *devlink,
7822                            const struct devlink_trap *traps,
7823                            size_t traps_count, void *priv)
7824 {
7825         int i, err;
7826
7827         if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
7828                 return -EINVAL;
7829
7830         mutex_lock(&devlink->lock);
7831         for (i = 0; i < traps_count; i++) {
7832                 const struct devlink_trap *trap = &traps[i];
7833
7834                 err = devlink_trap_verify(trap);
7835                 if (err)
7836                         goto err_trap_verify;
7837
7838                 err = devlink_trap_register(devlink, trap, priv);
7839                 if (err)
7840                         goto err_trap_register;
7841         }
7842         mutex_unlock(&devlink->lock);
7843
7844         return 0;
7845
7846 err_trap_register:
7847 err_trap_verify:
7848         for (i--; i >= 0; i--)
7849                 devlink_trap_unregister(devlink, &traps[i]);
7850         mutex_unlock(&devlink->lock);
7851         return err;
7852 }
7853 EXPORT_SYMBOL_GPL(devlink_traps_register);
7854
7855 /**
7856  * devlink_traps_unregister - Unregister packet traps from devlink.
7857  * @devlink: devlink.
7858  * @traps: Packet traps.
7859  * @traps_count: Count of provided packet traps.
7860  */
7861 void devlink_traps_unregister(struct devlink *devlink,
7862                               const struct devlink_trap *traps,
7863                               size_t traps_count)
7864 {
7865         int i;
7866
7867         mutex_lock(&devlink->lock);
7868         /* Make sure we do not have any packets in-flight while unregistering
7869          * traps by disabling all of them and waiting for a grace period.
7870          */
7871         for (i = traps_count - 1; i >= 0; i--)
7872                 devlink_trap_disable(devlink, &traps[i]);
7873         synchronize_rcu();
7874         for (i = traps_count - 1; i >= 0; i--)
7875                 devlink_trap_unregister(devlink, &traps[i]);
7876         mutex_unlock(&devlink->lock);
7877 }
7878 EXPORT_SYMBOL_GPL(devlink_traps_unregister);
7879
7880 static void
7881 devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
7882                           size_t skb_len)
7883 {
7884         struct devlink_stats *stats;
7885
7886         stats = this_cpu_ptr(trap_stats);
7887         u64_stats_update_begin(&stats->syncp);
7888         stats->rx_bytes += skb_len;
7889         stats->rx_packets++;
7890         u64_stats_update_end(&stats->syncp);
7891 }
7892
7893 static void
7894 devlink_trap_report_metadata_fill(struct net_dm_hw_metadata *hw_metadata,
7895                                   const struct devlink_trap_item *trap_item,
7896                                   struct devlink_port *in_devlink_port)
7897 {
7898         struct devlink_trap_group_item *group_item = trap_item->group_item;
7899
7900         hw_metadata->trap_group_name = group_item->group->name;
7901         hw_metadata->trap_name = trap_item->trap->name;
7902
7903         spin_lock(&in_devlink_port->type_lock);
7904         if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
7905                 hw_metadata->input_dev = in_devlink_port->type_dev;
7906         spin_unlock(&in_devlink_port->type_lock);
7907 }
7908
7909 /**
7910  * devlink_trap_report - Report trapped packet to drop monitor.
7911  * @devlink: devlink.
7912  * @skb: Trapped packet.
7913  * @trap_ctx: Trap context.
7914  * @in_devlink_port: Input devlink port.
7915  */
7916 void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
7917                          void *trap_ctx, struct devlink_port *in_devlink_port)
7918 {
7919         struct devlink_trap_item *trap_item = trap_ctx;
7920         struct net_dm_hw_metadata hw_metadata = {};
7921
7922         devlink_trap_stats_update(trap_item->stats, skb->len);
7923         devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
7924
7925         devlink_trap_report_metadata_fill(&hw_metadata, trap_item,
7926                                           in_devlink_port);
7927         net_dm_hw_report(skb, &hw_metadata);
7928 }
7929 EXPORT_SYMBOL_GPL(devlink_trap_report);
7930
7931 /**
7932  * devlink_trap_ctx_priv - Trap context to driver private information.
7933  * @trap_ctx: Trap context.
7934  *
7935  * Return: Driver private information passed during registration.
7936  */
7937 void *devlink_trap_ctx_priv(void *trap_ctx)
7938 {
7939         struct devlink_trap_item *trap_item = trap_ctx;
7940
7941         return trap_item->priv;
7942 }
7943 EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
7944
7945 static void __devlink_compat_running_version(struct devlink *devlink,
7946                                              char *buf, size_t len)
7947 {
7948         const struct nlattr *nlattr;
7949         struct devlink_info_req req;
7950         struct sk_buff *msg;
7951         int rem, err;
7952
7953         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7954         if (!msg)
7955                 return;
7956
7957         req.msg = msg;
7958         err = devlink->ops->info_get(devlink, &req, NULL);
7959         if (err)
7960                 goto free_msg;
7961
7962         nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
7963                 const struct nlattr *kv;
7964                 int rem_kv;
7965
7966                 if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
7967                         continue;
7968
7969                 nla_for_each_nested(kv, nlattr, rem_kv) {
7970                         if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
7971                                 continue;
7972
7973                         strlcat(buf, nla_data(kv), len);
7974                         strlcat(buf, " ", len);
7975                 }
7976         }
7977 free_msg:
7978         nlmsg_free(msg);
7979 }
7980
7981 void devlink_compat_running_version(struct net_device *dev,
7982                                     char *buf, size_t len)
7983 {
7984         struct devlink *devlink;
7985
7986         dev_hold(dev);
7987         rtnl_unlock();
7988
7989         devlink = netdev_to_devlink(dev);
7990         if (!devlink || !devlink->ops->info_get)
7991                 goto out;
7992
7993         mutex_lock(&devlink->lock);
7994         __devlink_compat_running_version(devlink, buf, len);
7995         mutex_unlock(&devlink->lock);
7996
7997 out:
7998         rtnl_lock();
7999         dev_put(dev);
8000 }
8001
8002 int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
8003 {
8004         struct devlink *devlink;
8005         int ret;
8006
8007         dev_hold(dev);
8008         rtnl_unlock();
8009
8010         devlink = netdev_to_devlink(dev);
8011         if (!devlink || !devlink->ops->flash_update) {
8012                 ret = -EOPNOTSUPP;
8013                 goto out;
8014         }
8015
8016         mutex_lock(&devlink->lock);
8017         ret = devlink->ops->flash_update(devlink, file_name, NULL, NULL);
8018         mutex_unlock(&devlink->lock);
8019
8020 out:
8021         rtnl_lock();
8022         dev_put(dev);
8023
8024         return ret;
8025 }
8026
8027 int devlink_compat_phys_port_name_get(struct net_device *dev,
8028                                       char *name, size_t len)
8029 {
8030         struct devlink_port *devlink_port;
8031
8032         /* RTNL mutex is held here which ensures that devlink_port
8033          * instance cannot disappear in the middle. No need to take
8034          * any devlink lock as only permanent values are accessed.
8035          */
8036         ASSERT_RTNL();
8037
8038         devlink_port = netdev_to_devlink_port(dev);
8039         if (!devlink_port)
8040                 return -EOPNOTSUPP;
8041
8042         return __devlink_port_phys_port_name_get(devlink_port, name, len);
8043 }
8044
8045 int devlink_compat_switch_id_get(struct net_device *dev,
8046                                  struct netdev_phys_item_id *ppid)
8047 {
8048         struct devlink_port *devlink_port;
8049
8050         /* Caller must hold RTNL mutex or reference to dev, which ensures that
8051          * devlink_port instance cannot disappear in the middle. No need to take
8052          * any devlink lock as only permanent values are accessed.
8053          */
8054         devlink_port = netdev_to_devlink_port(dev);
8055         if (!devlink_port || !devlink_port->attrs.switch_port)
8056                 return -EOPNOTSUPP;
8057
8058         memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
8059
8060         return 0;
8061 }
8062
8063 static int __init devlink_init(void)
8064 {
8065         return genl_register_family(&devlink_nl_family);
8066 }
8067
8068 subsys_initcall(devlink_init);