net/core/devlink.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * net/core/devlink.c - Network physical/parent device Netlink interface
   4  *
   5  * Heavily inspired by net/wireless/
   6  * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
   7  * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/types.h>
  13 #include <linux/slab.h>
  14 #include <linux/gfp.h>
  15 #include <linux/device.h>
  16 #include <linux/list.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/spinlock.h>
  19 #include <linux/refcount.h>
  20 #include <linux/workqueue.h>
  21 #include <linux/u64_stats_sync.h>
  22 #include <linux/timekeeping.h>
  23 #include <rdma/ib_verbs.h>
  24 #include <net/netlink.h>
  25 #include <net/genetlink.h>
  26 #include <net/rtnetlink.h>
  27 #include <net/net_namespace.h>
  28 #include <net/sock.h>
  29 #include <net/devlink.h>
  30 #include <net/drop_monitor.h>
  31 #define CREATE_TRACE_POINTS
  32 #include <trace/events/devlink.h>
  33
  34 static struct devlink_dpipe_field devlink_dpipe_fields_ethernet[] = {
  35         {
  36                 .name = "destination mac",
  37                 .id = DEVLINK_DPIPE_FIELD_ETHERNET_DST_MAC,
  38                 .bitwidth = 48,
  39         },
  40 };
  41
  42 struct devlink_dpipe_header devlink_dpipe_header_ethernet = {
  43         .name = "ethernet",
  44         .id = DEVLINK_DPIPE_HEADER_ETHERNET,
  45         .fields = devlink_dpipe_fields_ethernet,
  46         .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ethernet),
  47         .global = true,
  48 };
  49 EXPORT_SYMBOL(devlink_dpipe_header_ethernet);
  50
  51 static struct devlink_dpipe_field devlink_dpipe_fields_ipv4[] = {
  52         {
  53                 .name = "destination ip",
  54                 .id = DEVLINK_DPIPE_FIELD_IPV4_DST_IP,
  55                 .bitwidth = 32,
  56         },
  57 };
  58
  59 struct devlink_dpipe_header devlink_dpipe_header_ipv4 = {
  60         .name = "ipv4",
  61         .id = DEVLINK_DPIPE_HEADER_IPV4,
  62         .fields = devlink_dpipe_fields_ipv4,
  63         .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv4),
  64         .global = true,
  65 };
  66 EXPORT_SYMBOL(devlink_dpipe_header_ipv4);
  67
  68 static struct devlink_dpipe_field devlink_dpipe_fields_ipv6[] = {
  69         {
  70                 .name = "destination ip",
  71                 .id = DEVLINK_DPIPE_FIELD_IPV6_DST_IP,
  72                 .bitwidth = 128,
  73         },
  74 };
  75
  76 struct devlink_dpipe_header devlink_dpipe_header_ipv6 = {
  77         .name = "ipv6",
  78         .id = DEVLINK_DPIPE_HEADER_IPV6,
  79         .fields = devlink_dpipe_fields_ipv6,
  80         .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv6),
  81         .global = true,
  82 };
  83 EXPORT_SYMBOL(devlink_dpipe_header_ipv6);
  84
  85 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
  86 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr);
  87
  88 static LIST_HEAD(devlink_list);
  89
  90 /* devlink_mutex
  91  *
  92  * An overall lock guarding every operation coming from userspace.
  93  * It also guards devlink devices list and it is taken when
  94  * driver registers/unregisters it.
  95  */
  96 static DEFINE_MUTEX(devlink_mutex);
  97
  98 struct net *devlink_net(const struct devlink *devlink)
  99 {
 100         return read_pnet(&devlink->_net);
 101 }
 102 EXPORT_SYMBOL_GPL(devlink_net);
 103
 104 static void __devlink_net_set(struct devlink *devlink, struct net *net)
 105 {
 106         write_pnet(&devlink->_net, net);
 107 }
 108
 109 void devlink_net_set(struct devlink *devlink, struct net *net)
 110 {
 111         if (WARN_ON(devlink->registered))
 112                 return;
 113         __devlink_net_set(devlink, net);
 114 }
 115 EXPORT_SYMBOL_GPL(devlink_net_set);
 116
 117 static struct devlink *devlink_get_from_attrs(struct net *net,
 118                                               struct nlattr **attrs)
 119 {
 120         struct devlink *devlink;
 121         char *busname;
 122         char *devname;
 123
 124         if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])
 125                 return ERR_PTR(-EINVAL);
 126
 127         busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
 128         devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
 129
 130         lockdep_assert_held(&devlink_mutex);
 131
 132         list_for_each_entry(devlink, &devlink_list, list) {
 133                 if (strcmp(devlink->dev->bus->name, busname) == 0 &&
 134                     strcmp(dev_name(devlink->dev), devname) == 0 &&
 135                     net_eq(devlink_net(devlink), net))
 136                         return devlink;
 137         }
 138
 139         return ERR_PTR(-ENODEV);
 140 }
 141
 142 static struct devlink *devlink_get_from_info(struct genl_info *info)
 143 {
 144         return devlink_get_from_attrs(genl_info_net(info), info->attrs);
 145 }
 146
 147 static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
 148                                                       unsigned int port_index)
 149 {
 150         struct devlink_port *devlink_port;
 151
 152         list_for_each_entry(devlink_port, &devlink->port_list, list) {
 153                 if (devlink_port->index == port_index)
 154                         return devlink_port;
 155         }
 156         return NULL;
 157 }
 158
 159 static bool devlink_port_index_exists(struct devlink *devlink,
 160                                       unsigned int port_index)
 161 {
 162         return devlink_port_get_by_index(devlink, port_index);
 163 }
 164
 165 static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
 166                                                         struct nlattr **attrs)
 167 {
 168         if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
 169                 u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
 170                 struct devlink_port *devlink_port;
 171
 172                 devlink_port = devlink_port_get_by_index(devlink, port_index);
 173                 if (!devlink_port)
 174                         return ERR_PTR(-ENODEV);
 175                 return devlink_port;
 176         }
 177         return ERR_PTR(-EINVAL);
 178 }
 179
 180 static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
 181                                                        struct genl_info *info)
 182 {
 183         return devlink_port_get_from_attrs(devlink, info->attrs);
 184 }
 185
 186 struct devlink_sb {
 187         struct list_head list;
 188         unsigned int index;
 189         u32 size;
 190         u16 ingress_pools_count;
 191         u16 egress_pools_count;
 192         u16 ingress_tc_count;
 193         u16 egress_tc_count;
 194 };
 195
 196 static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb)
 197 {
 198         return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count;
 199 }
 200
 201 static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink,
 202                                                   unsigned int sb_index)
 203 {
 204         struct devlink_sb *devlink_sb;
 205
 206         list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
 207                 if (devlink_sb->index == sb_index)
 208                         return devlink_sb;
 209         }
 210         return NULL;
 211 }
 212
 213 static bool devlink_sb_index_exists(struct devlink *devlink,
 214                                     unsigned int sb_index)
 215 {
 216         return devlink_sb_get_by_index(devlink, sb_index);
 217 }
 218
 219 static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink,
 220                                                     struct nlattr **attrs)
 221 {
 222         if (attrs[DEVLINK_ATTR_SB_INDEX]) {
 223                 u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]);
 224                 struct devlink_sb *devlink_sb;
 225
 226                 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
 227                 if (!devlink_sb)
 228                         return ERR_PTR(-ENODEV);
 229                 return devlink_sb;
 230         }
 231         return ERR_PTR(-EINVAL);
 232 }
 233
 234 static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink,
 235                                                    struct genl_info *info)
 236 {
 237         return devlink_sb_get_from_attrs(devlink, info->attrs);
 238 }
 239
 240 static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb,
 241                                                 struct nlattr **attrs,
 242                                                 u16 *p_pool_index)
 243 {
 244         u16 val;
 245
 246         if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX])
 247                 return -EINVAL;
 248
 249         val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]);
 250         if (val >= devlink_sb_pool_count(devlink_sb))
 251                 return -EINVAL;
 252         *p_pool_index = val;
 253         return 0;
 254 }
 255
 256 static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb,
 257                                                struct genl_info *info,
 258                                                u16 *p_pool_index)
 259 {
 260         return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs,
 261                                                     p_pool_index);
 262 }
 263
 264 static int
 265 devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs,
 266                                     enum devlink_sb_pool_type *p_pool_type)
 267 {
 268         u8 val;
 269
 270         if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE])
 271                 return -EINVAL;
 272
 273         val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]);
 274         if (val != DEVLINK_SB_POOL_TYPE_INGRESS &&
 275             val != DEVLINK_SB_POOL_TYPE_EGRESS)
 276                 return -EINVAL;
 277         *p_pool_type = val;
 278         return 0;
 279 }
 280
 281 static int
 282 devlink_sb_pool_type_get_from_info(struct genl_info *info,
 283                                    enum devlink_sb_pool_type *p_pool_type)
 284 {
 285         return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type);
 286 }
 287
 288 static int
 289 devlink_sb_th_type_get_from_attrs(struct nlattr **attrs,
 290                                   enum devlink_sb_threshold_type *p_th_type)
 291 {
 292         u8 val;
 293
 294         if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])
 295                 return -EINVAL;
 296
 297         val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]);
 298         if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC &&
 299             val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC)
 300                 return -EINVAL;
 301         *p_th_type = val;
 302         return 0;
 303 }
 304
 305 static int
 306 devlink_sb_th_type_get_from_info(struct genl_info *info,
 307                                  enum devlink_sb_threshold_type *p_th_type)
 308 {
 309         return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type);
 310 }
 311
 312 static int
 313 devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb,
 314                                    struct nlattr **attrs,
 315                                    enum devlink_sb_pool_type pool_type,
 316                                    u16 *p_tc_index)
 317 {
 318         u16 val;
 319
 320         if (!attrs[DEVLINK_ATTR_SB_TC_INDEX])
 321                 return -EINVAL;
 322
 323         val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]);
 324         if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS &&
 325             val >= devlink_sb->ingress_tc_count)
 326                 return -EINVAL;
 327         if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS &&
 328             val >= devlink_sb->egress_tc_count)
 329                 return -EINVAL;
 330         *p_tc_index = val;
 331         return 0;
 332 }
 333
 334 static int
 335 devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
 336                                   struct genl_info *info,
 337                                   enum devlink_sb_pool_type pool_type,
 338                                   u16 *p_tc_index)
 339 {
 340         return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs,
 341                                                   pool_type, p_tc_index);
 342 }
 343
 344 struct devlink_region {
 345         struct devlink *devlink;
 346         struct list_head list;
 347         const char *name;
 348         struct list_head snapshot_list;
 349         u32 max_snapshots;
 350         u32 cur_snapshots;
 351         u64 size;
 352 };
 353
 354 struct devlink_snapshot {
 355         struct list_head list;
 356         struct devlink_region *region;
 357         devlink_snapshot_data_dest_t *data_destructor;
 358         u8 *data;
 359         u32 id;
 360 };
 361
 362 static struct devlink_region *
 363 devlink_region_get_by_name(struct devlink *devlink, const char *region_name)
 364 {
 365         struct devlink_region *region;
 366
 367         list_for_each_entry(region, &devlink->region_list, list)
 368                 if (!strcmp(region->name, region_name))
 369                         return region;
 370
 371         return NULL;
 372 }
 373
 374 static struct devlink_snapshot *
 375 devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id)
 376 {
 377         struct devlink_snapshot *snapshot;
 378
 379         list_for_each_entry(snapshot, &region->snapshot_list, list)
 380                 if (snapshot->id == id)
 381                         return snapshot;
 382
 383         return NULL;
 384 }
 385
 386 #define DEVLINK_NL_FLAG_NEED_DEVLINK    BIT(0)
 387 #define DEVLINK_NL_FLAG_NEED_PORT       BIT(1)
 388 #define DEVLINK_NL_FLAG_NEED_SB         BIT(2)
 389
 390 /* The per devlink instance lock is taken by default in the pre-doit
 391  * operation, yet several commands do not require this. The global
 392  * devlink lock is taken and protects from disruption by user-calls.
 393  */
 394 #define DEVLINK_NL_FLAG_NO_LOCK         BIT(3)
 395
 396 static int devlink_nl_pre_doit(const struct genl_ops *ops,
 397                                struct sk_buff *skb, struct genl_info *info)
 398 {
 399         struct devlink *devlink;
 400         int err;
 401
 402         mutex_lock(&devlink_mutex);
 403         devlink = devlink_get_from_info(info);
 404         if (IS_ERR(devlink)) {
 405                 mutex_unlock(&devlink_mutex);
 406                 return PTR_ERR(devlink);
 407         }
 408         if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
 409                 mutex_lock(&devlink->lock);
 410         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
 411                 info->user_ptr[0] = devlink;
 412         } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
 413                 struct devlink_port *devlink_port;
 414
 415                 devlink_port = devlink_port_get_from_info(devlink, info);
 416                 if (IS_ERR(devlink_port)) {
 417                         err = PTR_ERR(devlink_port);
 418                         goto unlock;
 419                 }
 420                 info->user_ptr[0] = devlink_port;
 421         }
 422         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_SB) {
 423                 struct devlink_sb *devlink_sb;
 424
 425                 devlink_sb = devlink_sb_get_from_info(devlink, info);
 426                 if (IS_ERR(devlink_sb)) {
 427                         err = PTR_ERR(devlink_sb);
 428                         goto unlock;
 429                 }
 430                 info->user_ptr[1] = devlink_sb;
 431         }
 432         return 0;
 433
 434 unlock:
 435         if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
 436                 mutex_unlock(&devlink->lock);
 437         mutex_unlock(&devlink_mutex);
 438         return err;
 439 }
 440
 441 static void devlink_nl_post_doit(const struct genl_ops *ops,
 442                                  struct sk_buff *skb, struct genl_info *info)
 443 {
 444         struct devlink *devlink;
 445
 446         /* When devlink changes netns, it would not be found
 447          * by devlink_get_from_info(). So try if it is stored first.
 448          */
 449         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
 450                 devlink = info->user_ptr[0];
 451         } else {
 452                 devlink = devlink_get_from_info(info);
 453                 WARN_ON(IS_ERR(devlink));
 454         }
 455         if (!IS_ERR(devlink) && ~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
 456                 mutex_unlock(&devlink->lock);
 457         mutex_unlock(&devlink_mutex);
 458 }
 459
 460 static struct genl_family devlink_nl_family;
 461
 462 enum devlink_multicast_groups {
 463         DEVLINK_MCGRP_CONFIG,
 464 };
 465
 466 static const struct genl_multicast_group devlink_nl_mcgrps[] = {
 467         [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },
 468 };
 469
 470 static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
 471 {
 472         if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
 473                 return -EMSGSIZE;
 474         if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
 475                 return -EMSGSIZE;
 476         return 0;
 477 }
 478
 479 static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
 480                            enum devlink_command cmd, u32 portid,
 481                            u32 seq, int flags)
 482 {
 483         void *hdr;
 484
 485         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 486         if (!hdr)
 487                 return -EMSGSIZE;
 488
 489         if (devlink_nl_put_handle(msg, devlink))
 490                 goto nla_put_failure;
 491         if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_FAILED, devlink->reload_failed))
 492                 goto nla_put_failure;
 493
 494         genlmsg_end(msg, hdr);
 495         return 0;
 496
 497 nla_put_failure:
 498         genlmsg_cancel(msg, hdr);
 499         return -EMSGSIZE;
 500 }
 501
 502 static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
 503 {
 504         struct sk_buff *msg;
 505         int err;
 506
 507         WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
 508
 509         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 510         if (!msg)
 511                 return;
 512
 513         err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
 514         if (err) {
 515                 nlmsg_free(msg);
 516                 return;
 517         }
 518
 519         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
 520                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
 521 }
 522
 523 static int devlink_nl_port_attrs_put(struct sk_buff *msg,
 524                                      struct devlink_port *devlink_port)
 525 {
 526         struct devlink_port_attrs *attrs = &devlink_port->attrs;
 527
 528         if (!attrs->set)
 529                 return 0;
 530         if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
 531                 return -EMSGSIZE;
 532         switch (devlink_port->attrs.flavour) {
 533         case DEVLINK_PORT_FLAVOUR_PCI_PF:
 534                 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
 535                                 attrs->pci_pf.pf))
 536                         return -EMSGSIZE;
 537                 break;
 538         case DEVLINK_PORT_FLAVOUR_PCI_VF:
 539                 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
 540                                 attrs->pci_vf.pf) ||
 541                     nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER,
 542                                 attrs->pci_vf.vf))
 543                         return -EMSGSIZE;
 544                 break;
 545         case DEVLINK_PORT_FLAVOUR_PHYSICAL:
 546         case DEVLINK_PORT_FLAVOUR_CPU:
 547         case DEVLINK_PORT_FLAVOUR_DSA:
 548                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER,
 549                                 attrs->phys.port_number))
 550                         return -EMSGSIZE;
 551                 if (!attrs->split)
 552                         return 0;
 553                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
 554                                 attrs->phys.port_number))
 555                         return -EMSGSIZE;
 556                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
 557                                 attrs->phys.split_subport_number))
 558                         return -EMSGSIZE;
 559                 break;
 560         default:
 561                 break;
 562         }
 563         return 0;
 564 }
 565
 566 static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
 567                                 struct devlink_port *devlink_port,
 568                                 enum devlink_command cmd, u32 portid,
 569                                 u32 seq, int flags)
 570 {
 571         void *hdr;
 572
 573         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 574         if (!hdr)
 575                 return -EMSGSIZE;
 576
 577         if (devlink_nl_put_handle(msg, devlink))
 578                 goto nla_put_failure;
 579         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
 580                 goto nla_put_failure;
 581
 582         spin_lock_bh(&devlink_port->type_lock);
 583         if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
 584                 goto nla_put_failure_type_locked;
 585         if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
 586             nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
 587                         devlink_port->desired_type))
 588                 goto nla_put_failure_type_locked;
 589         if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
 590                 struct net_device *netdev = devlink_port->type_dev;
 591
 592                 if (netdev &&
 593                     (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
 594                                  netdev->ifindex) ||
 595                      nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
 596                                     netdev->name)))
 597                         goto nla_put_failure_type_locked;
 598         }
 599         if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
 600                 struct ib_device *ibdev = devlink_port->type_dev;
 601
 602                 if (ibdev &&
 603                     nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
 604                                    ibdev->name))
 605                         goto nla_put_failure_type_locked;
 606         }
 607         spin_unlock_bh(&devlink_port->type_lock);
 608         if (devlink_nl_port_attrs_put(msg, devlink_port))
 609                 goto nla_put_failure;
 610
 611         genlmsg_end(msg, hdr);
 612         return 0;
 613
 614 nla_put_failure_type_locked:
 615         spin_unlock_bh(&devlink_port->type_lock);
 616 nla_put_failure:
 617         genlmsg_cancel(msg, hdr);
 618         return -EMSGSIZE;
 619 }
 620
 621 static void devlink_port_notify(struct devlink_port *devlink_port,
 622                                 enum devlink_command cmd)
 623 {
 624         struct devlink *devlink = devlink_port->devlink;
 625         struct sk_buff *msg;
 626         int err;
 627
 628         if (!devlink_port->registered)
 629                 return;
 630
 631         WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
 632
 633         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 634         if (!msg)
 635                 return;
 636
 637         err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0);
 638         if (err) {
 639                 nlmsg_free(msg);
 640                 return;
 641         }
 642
 643         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
 644                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
 645 }
 646
 647 static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info)
 648 {
 649         struct devlink *devlink = info->user_ptr[0];
 650         struct sk_buff *msg;
 651         int err;
 652
 653         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 654         if (!msg)
 655                 return -ENOMEM;
 656
 657         err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
 658                               info->snd_portid, info->snd_seq, 0);
 659         if (err) {
 660                 nlmsg_free(msg);
 661                 return err;
 662         }
 663
 664         return genlmsg_reply(msg, info);
 665 }
 666
 667 static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg,
 668                                      struct netlink_callback *cb)
 669 {
 670         struct devlink *devlink;
 671         int start = cb->args[0];
 672         int idx = 0;
 673         int err;
 674
 675         mutex_lock(&devlink_mutex);
 676         list_for_each_entry(devlink, &devlink_list, list) {
 677                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 678                         continue;
 679                 if (idx < start) {
 680                         idx++;
 681                         continue;
 682                 }
 683                 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
 684                                       NETLINK_CB(cb->skb).portid,
 685                                       cb->nlh->nlmsg_seq, NLM_F_MULTI);
 686                 if (err)
 687                         goto out;
 688                 idx++;
 689         }
 690 out:
 691         mutex_unlock(&devlink_mutex);
 692
 693         cb->args[0] = idx;
 694         return msg->len;
 695 }
 696
 697 static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
 698                                         struct genl_info *info)
 699 {
 700         struct devlink_port *devlink_port = info->user_ptr[0];
 701         struct devlink *devlink = devlink_port->devlink;
 702         struct sk_buff *msg;
 703         int err;
 704
 705         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 706         if (!msg)
 707                 return -ENOMEM;
 708
 709         err = devlink_nl_port_fill(msg, devlink, devlink_port,
 710                                    DEVLINK_CMD_PORT_NEW,
 711                                    info->snd_portid, info->snd_seq, 0);
 712         if (err) {
 713                 nlmsg_free(msg);
 714                 return err;
 715         }
 716
 717         return genlmsg_reply(msg, info);
 718 }
 719
 720 static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
 721                                           struct netlink_callback *cb)
 722 {
 723         struct devlink *devlink;
 724         struct devlink_port *devlink_port;
 725         int start = cb->args[0];
 726         int idx = 0;
 727         int err;
 728
 729         mutex_lock(&devlink_mutex);
 730         list_for_each_entry(devlink, &devlink_list, list) {
 731                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 732                         continue;
 733                 mutex_lock(&devlink->lock);
 734                 list_for_each_entry(devlink_port, &devlink->port_list, list) {
 735                         if (idx < start) {
 736                                 idx++;
 737                                 continue;
 738                         }
 739                         err = devlink_nl_port_fill(msg, devlink, devlink_port,
 740                                                    DEVLINK_CMD_NEW,
 741                                                    NETLINK_CB(cb->skb).portid,
 742                                                    cb->nlh->nlmsg_seq,
 743                                                    NLM_F_MULTI);
 744                         if (err) {
 745                                 mutex_unlock(&devlink->lock);
 746                                 goto out;
 747                         }
 748                         idx++;
 749                 }
 750                 mutex_unlock(&devlink->lock);
 751         }
 752 out:
 753         mutex_unlock(&devlink_mutex);
 754
 755         cb->args[0] = idx;
 756         return msg->len;
 757 }
 758
 759 static int devlink_port_type_set(struct devlink *devlink,
 760                                  struct devlink_port *devlink_port,
 761                                  enum devlink_port_type port_type)
 762
 763 {
 764         int err;
 765
 766         if (devlink->ops->port_type_set) {
 767                 if (port_type == DEVLINK_PORT_TYPE_NOTSET)
 768                         return -EINVAL;
 769                 if (port_type == devlink_port->type)
 770                         return 0;
 771                 err = devlink->ops->port_type_set(devlink_port, port_type);
 772                 if (err)
 773                         return err;
 774                 devlink_port->desired_type = port_type;
 775                 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
 776                 return 0;
 777         }
 778         return -EOPNOTSUPP;
 779 }
 780
 781 static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
 782                                         struct genl_info *info)
 783 {
 784         struct devlink_port *devlink_port = info->user_ptr[0];
 785         struct devlink *devlink = devlink_port->devlink;
 786         int err;
 787
 788         if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
 789                 enum devlink_port_type port_type;
 790
 791                 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
 792                 err = devlink_port_type_set(devlink, devlink_port, port_type);
 793                 if (err)
 794                         return err;
 795         }
 796         return 0;
 797 }
 798
 799 static int devlink_port_split(struct devlink *devlink, u32 port_index,
 800                               u32 count, struct netlink_ext_ack *extack)
 801
 802 {
 803         if (devlink->ops->port_split)
 804                 return devlink->ops->port_split(devlink, port_index, count,
 805                                                 extack);
 806         return -EOPNOTSUPP;
 807 }
 808
 809 static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
 810                                           struct genl_info *info)
 811 {
 812         struct devlink *devlink = info->user_ptr[0];
 813         u32 port_index;
 814         u32 count;
 815
 816         if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
 817             !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
 818                 return -EINVAL;
 819
 820         port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
 821         count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
 822         return devlink_port_split(devlink, port_index, count, info->extack);
 823 }
 824
 825 static int devlink_port_unsplit(struct devlink *devlink, u32 port_index,
 826                                 struct netlink_ext_ack *extack)
 827
 828 {
 829         if (devlink->ops->port_unsplit)
 830                 return devlink->ops->port_unsplit(devlink, port_index, extack);
 831         return -EOPNOTSUPP;
 832 }
 833
 834 static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
 835                                             struct genl_info *info)
 836 {
 837         struct devlink *devlink = info->user_ptr[0];
 838         u32 port_index;
 839
 840         if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
 841                 return -EINVAL;
 842
 843         port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
 844         return devlink_port_unsplit(devlink, port_index, info->extack);
 845 }
 846
 847 static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
 848                               struct devlink_sb *devlink_sb,
 849                               enum devlink_command cmd, u32 portid,
 850                               u32 seq, int flags)
 851 {
 852         void *hdr;
 853
 854         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 855         if (!hdr)
 856                 return -EMSGSIZE;
 857
 858         if (devlink_nl_put_handle(msg, devlink))
 859                 goto nla_put_failure;
 860         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
 861                 goto nla_put_failure;
 862         if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size))
 863                 goto nla_put_failure;
 864         if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT,
 865                         devlink_sb->ingress_pools_count))
 866                 goto nla_put_failure;
 867         if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT,
 868                         devlink_sb->egress_pools_count))
 869                 goto nla_put_failure;
 870         if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT,
 871                         devlink_sb->ingress_tc_count))
 872                 goto nla_put_failure;
 873         if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT,
 874                         devlink_sb->egress_tc_count))
 875                 goto nla_put_failure;
 876
 877         genlmsg_end(msg, hdr);
 878         return 0;
 879
 880 nla_put_failure:
 881         genlmsg_cancel(msg, hdr);
 882         return -EMSGSIZE;
 883 }
 884
 885 static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb,
 886                                       struct genl_info *info)
 887 {
 888         struct devlink *devlink = info->user_ptr[0];
 889         struct devlink_sb *devlink_sb = info->user_ptr[1];
 890         struct sk_buff *msg;
 891         int err;
 892
 893         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 894         if (!msg)
 895                 return -ENOMEM;
 896
 897         err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
 898                                  DEVLINK_CMD_SB_NEW,
 899                                  info->snd_portid, info->snd_seq, 0);
 900         if (err) {
 901                 nlmsg_free(msg);
 902                 return err;
 903         }
 904
 905         return genlmsg_reply(msg, info);
 906 }
 907
 908 static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
 909                                         struct netlink_callback *cb)
 910 {
 911         struct devlink *devlink;
 912         struct devlink_sb *devlink_sb;
 913         int start = cb->args[0];
 914         int idx = 0;
 915         int err;
 916
 917         mutex_lock(&devlink_mutex);
 918         list_for_each_entry(devlink, &devlink_list, list) {
 919                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 920                         continue;
 921                 mutex_lock(&devlink->lock);
 922                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
 923                         if (idx < start) {
 924                                 idx++;
 925                                 continue;
 926                         }
 927                         err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
 928                                                  DEVLINK_CMD_SB_NEW,
 929                                                  NETLINK_CB(cb->skb).portid,
 930                                                  cb->nlh->nlmsg_seq,
 931                                                  NLM_F_MULTI);
 932                         if (err) {
 933                                 mutex_unlock(&devlink->lock);
 934                                 goto out;
 935                         }
 936                         idx++;
 937                 }
 938                 mutex_unlock(&devlink->lock);
 939         }
 940 out:
 941         mutex_unlock(&devlink_mutex);
 942
 943         cb->args[0] = idx;
 944         return msg->len;
 945 }
 946
 947 static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink,
 948                                    struct devlink_sb *devlink_sb,
 949                                    u16 pool_index, enum devlink_command cmd,
 950                                    u32 portid, u32 seq, int flags)
 951 {
 952         struct devlink_sb_pool_info pool_info;
 953         void *hdr;
 954         int err;
 955
 956         err = devlink->ops->sb_pool_get(devlink, devlink_sb->index,
 957                                         pool_index, &pool_info);
 958         if (err)
 959                 return err;
 960
 961         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 962         if (!hdr)
 963                 return -EMSGSIZE;
 964
 965         if (devlink_nl_put_handle(msg, devlink))
 966                 goto nla_put_failure;
 967         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
 968                 goto nla_put_failure;
 969         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
 970                 goto nla_put_failure;
 971         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type))
 972                 goto nla_put_failure;
 973         if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size))
 974                 goto nla_put_failure;
 975         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
 976                        pool_info.threshold_type))
 977                 goto nla_put_failure;
 978         if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_CELL_SIZE,
 979                         pool_info.cell_size))
 980                 goto nla_put_failure;
 981
 982         genlmsg_end(msg, hdr);
 983         return 0;
 984
 985 nla_put_failure:
 986         genlmsg_cancel(msg, hdr);
 987         return -EMSGSIZE;
 988 }
 989
 990 static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb,
 991                                            struct genl_info *info)
 992 {
 993         struct devlink *devlink = info->user_ptr[0];
 994         struct devlink_sb *devlink_sb = info->user_ptr[1];
 995         struct sk_buff *msg;
 996         u16 pool_index;
 997         int err;
 998
 999         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1000                                                   &pool_index);
1001         if (err)
1002                 return err;
1003
1004         if (!devlink->ops->sb_pool_get)
1005                 return -EOPNOTSUPP;
1006
1007         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1008         if (!msg)
1009                 return -ENOMEM;
1010
1011         err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index,
1012                                       DEVLINK_CMD_SB_POOL_NEW,
1013                                       info->snd_portid, info->snd_seq, 0);
1014         if (err) {
1015                 nlmsg_free(msg);
1016                 return err;
1017         }
1018
1019         return genlmsg_reply(msg, info);
1020 }
1021
1022 static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1023                                 struct devlink *devlink,
1024                                 struct devlink_sb *devlink_sb,
1025                                 u32 portid, u32 seq)
1026 {
1027         u16 pool_count = devlink_sb_pool_count(devlink_sb);
1028         u16 pool_index;
1029         int err;
1030
1031         for (pool_index = 0; pool_index < pool_count; pool_index++) {
1032                 if (*p_idx < start) {
1033                         (*p_idx)++;
1034                         continue;
1035                 }
1036                 err = devlink_nl_sb_pool_fill(msg, devlink,
1037                                               devlink_sb,
1038                                               pool_index,
1039                                               DEVLINK_CMD_SB_POOL_NEW,
1040                                               portid, seq, NLM_F_MULTI);
1041                 if (err)
1042                         return err;
1043                 (*p_idx)++;
1044         }
1045         return 0;
1046 }
1047
1048 static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg,
1049                                              struct netlink_callback *cb)
1050 {
1051         struct devlink *devlink;
1052         struct devlink_sb *devlink_sb;
1053         int start = cb->args[0];
1054         int idx = 0;
1055         int err = 0;
1056
1057         mutex_lock(&devlink_mutex);
1058         list_for_each_entry(devlink, &devlink_list, list) {
1059                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1060                     !devlink->ops->sb_pool_get)
1061                         continue;
1062                 mutex_lock(&devlink->lock);
1063                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1064                         err = __sb_pool_get_dumpit(msg, start, &idx, devlink,
1065                                                    devlink_sb,
1066                                                    NETLINK_CB(cb->skb).portid,
1067                                                    cb->nlh->nlmsg_seq);
1068                         if (err && err != -EOPNOTSUPP) {
1069                                 mutex_unlock(&devlink->lock);
1070                                 goto out;
1071                         }
1072                 }
1073                 mutex_unlock(&devlink->lock);
1074         }
1075 out:
1076         mutex_unlock(&devlink_mutex);
1077
1078         if (err != -EMSGSIZE)
1079                 return err;
1080
1081         cb->args[0] = idx;
1082         return msg->len;
1083 }
1084
1085 static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
1086                                u16 pool_index, u32 size,
1087                                enum devlink_sb_threshold_type threshold_type,
1088                                struct netlink_ext_ack *extack)
1089
1090 {
1091         const struct devlink_ops *ops = devlink->ops;
1092
1093         if (ops->sb_pool_set)
1094                 return ops->sb_pool_set(devlink, sb_index, pool_index,
1095                                         size, threshold_type, extack);
1096         return -EOPNOTSUPP;
1097 }
1098
1099 static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb,
1100                                            struct genl_info *info)
1101 {
1102         struct devlink *devlink = info->user_ptr[0];
1103         struct devlink_sb *devlink_sb = info->user_ptr[1];
1104         enum devlink_sb_threshold_type threshold_type;
1105         u16 pool_index;
1106         u32 size;
1107         int err;
1108
1109         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1110                                                   &pool_index);
1111         if (err)
1112                 return err;
1113
1114         err = devlink_sb_th_type_get_from_info(info, &threshold_type);
1115         if (err)
1116                 return err;
1117
1118         if (!info->attrs[DEVLINK_ATTR_SB_POOL_SIZE])
1119                 return -EINVAL;
1120
1121         size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]);
1122         return devlink_sb_pool_set(devlink, devlink_sb->index,
1123                                    pool_index, size, threshold_type,
1124                                    info->extack);
1125 }
1126
1127 static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
1128                                         struct devlink *devlink,
1129                                         struct devlink_port *devlink_port,
1130                                         struct devlink_sb *devlink_sb,
1131                                         u16 pool_index,
1132                                         enum devlink_command cmd,
1133                                         u32 portid, u32 seq, int flags)
1134 {
1135         const struct devlink_ops *ops = devlink->ops;
1136         u32 threshold;
1137         void *hdr;
1138         int err;
1139
1140         err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
1141                                     pool_index, &threshold);
1142         if (err)
1143                 return err;
1144
1145         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1146         if (!hdr)
1147                 return -EMSGSIZE;
1148
1149         if (devlink_nl_put_handle(msg, devlink))
1150                 goto nla_put_failure;
1151         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1152                 goto nla_put_failure;
1153         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1154                 goto nla_put_failure;
1155         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1156                 goto nla_put_failure;
1157         if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1158                 goto nla_put_failure;
1159
1160         if (ops->sb_occ_port_pool_get) {
1161                 u32 cur;
1162                 u32 max;
1163
1164                 err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
1165                                                 pool_index, &cur, &max);
1166                 if (err && err != -EOPNOTSUPP)
1167                         return err;
1168                 if (!err) {
1169                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1170                                 goto nla_put_failure;
1171                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1172                                 goto nla_put_failure;
1173                 }
1174         }
1175
1176         genlmsg_end(msg, hdr);
1177         return 0;
1178
1179 nla_put_failure:
1180         genlmsg_cancel(msg, hdr);
1181         return -EMSGSIZE;
1182 }
1183
1184 static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
1185                                                 struct genl_info *info)
1186 {
1187         struct devlink_port *devlink_port = info->user_ptr[0];
1188         struct devlink *devlink = devlink_port->devlink;
1189         struct devlink_sb *devlink_sb = info->user_ptr[1];
1190         struct sk_buff *msg;
1191         u16 pool_index;
1192         int err;
1193
1194         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1195                                                   &pool_index);
1196         if (err)
1197                 return err;
1198
1199         if (!devlink->ops->sb_port_pool_get)
1200                 return -EOPNOTSUPP;
1201
1202         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1203         if (!msg)
1204                 return -ENOMEM;
1205
1206         err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port,
1207                                            devlink_sb, pool_index,
1208                                            DEVLINK_CMD_SB_PORT_POOL_NEW,
1209                                            info->snd_portid, info->snd_seq, 0);
1210         if (err) {
1211                 nlmsg_free(msg);
1212                 return err;
1213         }
1214
1215         return genlmsg_reply(msg, info);
1216 }
1217
1218 static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1219                                      struct devlink *devlink,
1220                                      struct devlink_sb *devlink_sb,
1221                                      u32 portid, u32 seq)
1222 {
1223         struct devlink_port *devlink_port;
1224         u16 pool_count = devlink_sb_pool_count(devlink_sb);
1225         u16 pool_index;
1226         int err;
1227
1228         list_for_each_entry(devlink_port, &devlink->port_list, list) {
1229                 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1230                         if (*p_idx < start) {
1231                                 (*p_idx)++;
1232                                 continue;
1233                         }
1234                         err = devlink_nl_sb_port_pool_fill(msg, devlink,
1235                                                            devlink_port,
1236                                                            devlink_sb,
1237                                                            pool_index,
1238                                                            DEVLINK_CMD_SB_PORT_POOL_NEW,
1239                                                            portid, seq,
1240                                                            NLM_F_MULTI);
1241                         if (err)
1242                                 return err;
1243                         (*p_idx)++;
1244                 }
1245         }
1246         return 0;
1247 }
1248
1249 static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg,
1250                                                   struct netlink_callback *cb)
1251 {
1252         struct devlink *devlink;
1253         struct devlink_sb *devlink_sb;
1254         int start = cb->args[0];
1255         int idx = 0;
1256         int err = 0;
1257
1258         mutex_lock(&devlink_mutex);
1259         list_for_each_entry(devlink, &devlink_list, list) {
1260                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1261                     !devlink->ops->sb_port_pool_get)
1262                         continue;
1263                 mutex_lock(&devlink->lock);
1264                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1265                         err = __sb_port_pool_get_dumpit(msg, start, &idx,
1266                                                         devlink, devlink_sb,
1267                                                         NETLINK_CB(cb->skb).portid,
1268                                                         cb->nlh->nlmsg_seq);
1269                         if (err && err != -EOPNOTSUPP) {
1270                                 mutex_unlock(&devlink->lock);
1271                                 goto out;
1272                         }
1273                 }
1274                 mutex_unlock(&devlink->lock);
1275         }
1276 out:
1277         mutex_unlock(&devlink_mutex);
1278
1279         if (err != -EMSGSIZE)
1280                 return err;
1281
1282         cb->args[0] = idx;
1283         return msg->len;
1284 }
1285
1286 static int devlink_sb_port_pool_set(struct devlink_port *devlink_port,
1287                                     unsigned int sb_index, u16 pool_index,
1288                                     u32 threshold,
1289                                     struct netlink_ext_ack *extack)
1290
1291 {
1292         const struct devlink_ops *ops = devlink_port->devlink->ops;
1293
1294         if (ops->sb_port_pool_set)
1295                 return ops->sb_port_pool_set(devlink_port, sb_index,
1296                                              pool_index, threshold, extack);
1297         return -EOPNOTSUPP;
1298 }
1299
1300 static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb,
1301                                                 struct genl_info *info)
1302 {
1303         struct devlink_port *devlink_port = info->user_ptr[0];
1304         struct devlink_sb *devlink_sb = info->user_ptr[1];
1305         u16 pool_index;
1306         u32 threshold;
1307         int err;
1308
1309         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1310                                                   &pool_index);
1311         if (err)
1312                 return err;
1313
1314         if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1315                 return -EINVAL;
1316
1317         threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1318         return devlink_sb_port_pool_set(devlink_port, devlink_sb->index,
1319                                         pool_index, threshold, info->extack);
1320 }
1321
1322 static int
1323 devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
1324                                 struct devlink_port *devlink_port,
1325                                 struct devlink_sb *devlink_sb, u16 tc_index,
1326                                 enum devlink_sb_pool_type pool_type,
1327                                 enum devlink_command cmd,
1328                                 u32 portid, u32 seq, int flags)
1329 {
1330         const struct devlink_ops *ops = devlink->ops;
1331         u16 pool_index;
1332         u32 threshold;
1333         void *hdr;
1334         int err;
1335
1336         err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
1337                                        tc_index, pool_type,
1338                                        &pool_index, &threshold);
1339         if (err)
1340                 return err;
1341
1342         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1343         if (!hdr)
1344                 return -EMSGSIZE;
1345
1346         if (devlink_nl_put_handle(msg, devlink))
1347                 goto nla_put_failure;
1348         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1349                 goto nla_put_failure;
1350         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1351                 goto nla_put_failure;
1352         if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index))
1353                 goto nla_put_failure;
1354         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type))
1355                 goto nla_put_failure;
1356         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1357                 goto nla_put_failure;
1358         if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1359                 goto nla_put_failure;
1360
1361         if (ops->sb_occ_tc_port_bind_get) {
1362                 u32 cur;
1363                 u32 max;
1364
1365                 err = ops->sb_occ_tc_port_bind_get(devlink_port,
1366                                                    devlink_sb->index,
1367                                                    tc_index, pool_type,
1368                                                    &cur, &max);
1369                 if (err && err != -EOPNOTSUPP)
1370                         return err;
1371                 if (!err) {
1372                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1373                                 goto nla_put_failure;
1374                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1375                                 goto nla_put_failure;
1376                 }
1377         }
1378
1379         genlmsg_end(msg, hdr);
1380         return 0;
1381
1382 nla_put_failure:
1383         genlmsg_cancel(msg, hdr);
1384         return -EMSGSIZE;
1385 }
1386
1387 static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
1388                                                    struct genl_info *info)
1389 {
1390         struct devlink_port *devlink_port = info->user_ptr[0];
1391         struct devlink *devlink = devlink_port->devlink;
1392         struct devlink_sb *devlink_sb = info->user_ptr[1];
1393         struct sk_buff *msg;
1394         enum devlink_sb_pool_type pool_type;
1395         u16 tc_index;
1396         int err;
1397
1398         err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1399         if (err)
1400                 return err;
1401
1402         err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1403                                                 pool_type, &tc_index);
1404         if (err)
1405                 return err;
1406
1407         if (!devlink->ops->sb_tc_pool_bind_get)
1408                 return -EOPNOTSUPP;
1409
1410         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1411         if (!msg)
1412                 return -ENOMEM;
1413
1414         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port,
1415                                               devlink_sb, tc_index, pool_type,
1416                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1417                                               info->snd_portid,
1418                                               info->snd_seq, 0);
1419         if (err) {
1420                 nlmsg_free(msg);
1421                 return err;
1422         }
1423
1424         return genlmsg_reply(msg, info);
1425 }
1426
1427 static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1428                                         int start, int *p_idx,
1429                                         struct devlink *devlink,
1430                                         struct devlink_sb *devlink_sb,
1431                                         u32 portid, u32 seq)
1432 {
1433         struct devlink_port *devlink_port;
1434         u16 tc_index;
1435         int err;
1436
1437         list_for_each_entry(devlink_port, &devlink->port_list, list) {
1438                 for (tc_index = 0;
1439                      tc_index < devlink_sb->ingress_tc_count; tc_index++) {
1440                         if (*p_idx < start) {
1441                                 (*p_idx)++;
1442                                 continue;
1443                         }
1444                         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1445                                                               devlink_port,
1446                                                               devlink_sb,
1447                                                               tc_index,
1448                                                               DEVLINK_SB_POOL_TYPE_INGRESS,
1449                                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1450                                                               portid, seq,
1451                                                               NLM_F_MULTI);
1452                         if (err)
1453                                 return err;
1454                         (*p_idx)++;
1455                 }
1456                 for (tc_index = 0;
1457                      tc_index < devlink_sb->egress_tc_count; tc_index++) {
1458                         if (*p_idx < start) {
1459                                 (*p_idx)++;
1460                                 continue;
1461                         }
1462                         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1463                                                               devlink_port,
1464                                                               devlink_sb,
1465                                                               tc_index,
1466                                                               DEVLINK_SB_POOL_TYPE_EGRESS,
1467                                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1468                                                               portid, seq,
1469                                                               NLM_F_MULTI);
1470                         if (err)
1471                                 return err;
1472                         (*p_idx)++;
1473                 }
1474         }
1475         return 0;
1476 }
1477
1478 static int
1479 devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1480                                           struct netlink_callback *cb)
1481 {
1482         struct devlink *devlink;
1483         struct devlink_sb *devlink_sb;
1484         int start = cb->args[0];
1485         int idx = 0;
1486         int err = 0;
1487
1488         mutex_lock(&devlink_mutex);
1489         list_for_each_entry(devlink, &devlink_list, list) {
1490                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1491                     !devlink->ops->sb_tc_pool_bind_get)
1492                         continue;
1493
1494                 mutex_lock(&devlink->lock);
1495                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1496                         err = __sb_tc_pool_bind_get_dumpit(msg, start, &idx,
1497                                                            devlink,
1498                                                            devlink_sb,
1499                                                            NETLINK_CB(cb->skb).portid,
1500                                                            cb->nlh->nlmsg_seq);
1501                         if (err && err != -EOPNOTSUPP) {
1502                                 mutex_unlock(&devlink->lock);
1503                                 goto out;
1504                         }
1505                 }
1506                 mutex_unlock(&devlink->lock);
1507         }
1508 out:
1509         mutex_unlock(&devlink_mutex);
1510
1511         if (err != -EMSGSIZE)
1512                 return err;
1513
1514         cb->args[0] = idx;
1515         return msg->len;
1516 }
1517
1518 static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
1519                                        unsigned int sb_index, u16 tc_index,
1520                                        enum devlink_sb_pool_type pool_type,
1521                                        u16 pool_index, u32 threshold,
1522                                        struct netlink_ext_ack *extack)
1523
1524 {
1525         const struct devlink_ops *ops = devlink_port->devlink->ops;
1526
1527         if (ops->sb_tc_pool_bind_set)
1528                 return ops->sb_tc_pool_bind_set(devlink_port, sb_index,
1529                                                 tc_index, pool_type,
1530                                                 pool_index, threshold, extack);
1531         return -EOPNOTSUPP;
1532 }
1533
1534 static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
1535                                                    struct genl_info *info)
1536 {
1537         struct devlink_port *devlink_port = info->user_ptr[0];
1538         struct devlink_sb *devlink_sb = info->user_ptr[1];
1539         enum devlink_sb_pool_type pool_type;
1540         u16 tc_index;
1541         u16 pool_index;
1542         u32 threshold;
1543         int err;
1544
1545         err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1546         if (err)
1547                 return err;
1548
1549         err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1550                                                 pool_type, &tc_index);
1551         if (err)
1552                 return err;
1553
1554         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1555                                                   &pool_index);
1556         if (err)
1557                 return err;
1558
1559         if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1560                 return -EINVAL;
1561
1562         threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1563         return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index,
1564                                            tc_index, pool_type,
1565                                            pool_index, threshold, info->extack);
1566 }
1567
1568 static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
1569                                                struct genl_info *info)
1570 {
1571         struct devlink *devlink = info->user_ptr[0];
1572         struct devlink_sb *devlink_sb = info->user_ptr[1];
1573         const struct devlink_ops *ops = devlink->ops;
1574
1575         if (ops->sb_occ_snapshot)
1576                 return ops->sb_occ_snapshot(devlink, devlink_sb->index);
1577         return -EOPNOTSUPP;
1578 }
1579
1580 static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
1581                                                 struct genl_info *info)
1582 {
1583         struct devlink *devlink = info->user_ptr[0];
1584         struct devlink_sb *devlink_sb = info->user_ptr[1];
1585         const struct devlink_ops *ops = devlink->ops;
1586
1587         if (ops->sb_occ_max_clear)
1588                 return ops->sb_occ_max_clear(devlink, devlink_sb->index);
1589         return -EOPNOTSUPP;
1590 }
1591
1592 static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
1593                                    enum devlink_command cmd, u32 portid,
1594                                    u32 seq, int flags)
1595 {
1596         const struct devlink_ops *ops = devlink->ops;
1597         enum devlink_eswitch_encap_mode encap_mode;
1598         u8 inline_mode;
1599         void *hdr;
1600         int err = 0;
1601         u16 mode;
1602
1603         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1604         if (!hdr)
1605                 return -EMSGSIZE;
1606
1607         err = devlink_nl_put_handle(msg, devlink);
1608         if (err)
1609                 goto nla_put_failure;
1610
1611         if (ops->eswitch_mode_get) {
1612                 err = ops->eswitch_mode_get(devlink, &mode);
1613                 if (err)
1614                         goto nla_put_failure;
1615                 err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode);
1616                 if (err)
1617                         goto nla_put_failure;
1618         }
1619
1620         if (ops->eswitch_inline_mode_get) {
1621                 err = ops->eswitch_inline_mode_get(devlink, &inline_mode);
1622                 if (err)
1623                         goto nla_put_failure;
1624                 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE,
1625                                  inline_mode);
1626                 if (err)
1627                         goto nla_put_failure;
1628         }
1629
1630         if (ops->eswitch_encap_mode_get) {
1631                 err = ops->eswitch_encap_mode_get(devlink, &encap_mode);
1632                 if (err)
1633                         goto nla_put_failure;
1634                 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_ENCAP_MODE, encap_mode);
1635                 if (err)
1636                         goto nla_put_failure;
1637         }
1638
1639         genlmsg_end(msg, hdr);
1640         return 0;
1641
1642 nla_put_failure:
1643         genlmsg_cancel(msg, hdr);
1644         return err;
1645 }
1646
1647 static int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb,
1648                                            struct genl_info *info)
1649 {
1650         struct devlink *devlink = info->user_ptr[0];
1651         struct sk_buff *msg;
1652         int err;
1653
1654         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1655         if (!msg)
1656                 return -ENOMEM;
1657
1658         err = devlink_nl_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_GET,
1659                                       info->snd_portid, info->snd_seq, 0);
1660
1661         if (err) {
1662                 nlmsg_free(msg);
1663                 return err;
1664         }
1665
1666         return genlmsg_reply(msg, info);
1667 }
1668
1669 static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb,
1670                                            struct genl_info *info)
1671 {
1672         struct devlink *devlink = info->user_ptr[0];
1673         const struct devlink_ops *ops = devlink->ops;
1674         enum devlink_eswitch_encap_mode encap_mode;
1675         u8 inline_mode;
1676         int err = 0;
1677         u16 mode;
1678
1679         if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) {
1680                 if (!ops->eswitch_mode_set)
1681                         return -EOPNOTSUPP;
1682                 mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
1683                 err = ops->eswitch_mode_set(devlink, mode, info->extack);
1684                 if (err)
1685                         return err;
1686         }
1687
1688         if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) {
1689                 if (!ops->eswitch_inline_mode_set)
1690                         return -EOPNOTSUPP;
1691                 inline_mode = nla_get_u8(
1692                                 info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]);
1693                 err = ops->eswitch_inline_mode_set(devlink, inline_mode,
1694                                                    info->extack);
1695                 if (err)
1696                         return err;
1697         }
1698
1699         if (info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]) {
1700                 if (!ops->eswitch_encap_mode_set)
1701                         return -EOPNOTSUPP;
1702                 encap_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]);
1703                 err = ops->eswitch_encap_mode_set(devlink, encap_mode,
1704                                                   info->extack);
1705                 if (err)
1706                         return err;
1707         }
1708
1709         return 0;
1710 }
1711
1712 int devlink_dpipe_match_put(struct sk_buff *skb,
1713                             struct devlink_dpipe_match *match)
1714 {
1715         struct devlink_dpipe_header *header = match->header;
1716         struct devlink_dpipe_field *field = &header->fields[match->field_id];
1717         struct nlattr *match_attr;
1718
1719         match_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_MATCH);
1720         if (!match_attr)
1721                 return -EMSGSIZE;
1722
1723         if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) ||
1724             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) ||
1725             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1726             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1727             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1728                 goto nla_put_failure;
1729
1730         nla_nest_end(skb, match_attr);
1731         return 0;
1732
1733 nla_put_failure:
1734         nla_nest_cancel(skb, match_attr);
1735         return -EMSGSIZE;
1736 }
1737 EXPORT_SYMBOL_GPL(devlink_dpipe_match_put);
1738
1739 static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table,
1740                                      struct sk_buff *skb)
1741 {
1742         struct nlattr *matches_attr;
1743
1744         matches_attr = nla_nest_start_noflag(skb,
1745                                              DEVLINK_ATTR_DPIPE_TABLE_MATCHES);
1746         if (!matches_attr)
1747                 return -EMSGSIZE;
1748
1749         if (table->table_ops->matches_dump(table->priv, skb))
1750                 goto nla_put_failure;
1751
1752         nla_nest_end(skb, matches_attr);
1753         return 0;
1754
1755 nla_put_failure:
1756         nla_nest_cancel(skb, matches_attr);
1757         return -EMSGSIZE;
1758 }
1759
1760 int devlink_dpipe_action_put(struct sk_buff *skb,
1761                              struct devlink_dpipe_action *action)
1762 {
1763         struct devlink_dpipe_header *header = action->header;
1764         struct devlink_dpipe_field *field = &header->fields[action->field_id];
1765         struct nlattr *action_attr;
1766
1767         action_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ACTION);
1768         if (!action_attr)
1769                 return -EMSGSIZE;
1770
1771         if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) ||
1772             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) ||
1773             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1774             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1775             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1776                 goto nla_put_failure;
1777
1778         nla_nest_end(skb, action_attr);
1779         return 0;
1780
1781 nla_put_failure:
1782         nla_nest_cancel(skb, action_attr);
1783         return -EMSGSIZE;
1784 }
1785 EXPORT_SYMBOL_GPL(devlink_dpipe_action_put);
1786
1787 static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table,
1788                                      struct sk_buff *skb)
1789 {
1790         struct nlattr *actions_attr;
1791
1792         actions_attr = nla_nest_start_noflag(skb,
1793                                              DEVLINK_ATTR_DPIPE_TABLE_ACTIONS);
1794         if (!actions_attr)
1795                 return -EMSGSIZE;
1796
1797         if (table->table_ops->actions_dump(table->priv, skb))
1798                 goto nla_put_failure;
1799
1800         nla_nest_end(skb, actions_attr);
1801         return 0;
1802
1803 nla_put_failure:
1804         nla_nest_cancel(skb, actions_attr);
1805         return -EMSGSIZE;
1806 }
1807
1808 static int devlink_dpipe_table_put(struct sk_buff *skb,
1809                                    struct devlink_dpipe_table *table)
1810 {
1811         struct nlattr *table_attr;
1812         u64 table_size;
1813
1814         table_size = table->table_ops->size_get(table->priv);
1815         table_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLE);
1816         if (!table_attr)
1817                 return -EMSGSIZE;
1818
1819         if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) ||
1820             nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table_size,
1821                               DEVLINK_ATTR_PAD))
1822                 goto nla_put_failure;
1823         if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED,
1824                        table->counters_enabled))
1825                 goto nla_put_failure;
1826
1827         if (table->resource_valid) {
1828                 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,
1829                                       table->resource_id, DEVLINK_ATTR_PAD) ||
1830                     nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS,
1831                                       table->resource_units, DEVLINK_ATTR_PAD))
1832                         goto nla_put_failure;
1833         }
1834         if (devlink_dpipe_matches_put(table, skb))
1835                 goto nla_put_failure;
1836
1837         if (devlink_dpipe_actions_put(table, skb))
1838                 goto nla_put_failure;
1839
1840         nla_nest_end(skb, table_attr);
1841         return 0;
1842
1843 nla_put_failure:
1844         nla_nest_cancel(skb, table_attr);
1845         return -EMSGSIZE;
1846 }
1847
1848 static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb,
1849                                             struct genl_info *info)
1850 {
1851         int err;
1852
1853         if (*pskb) {
1854                 err = genlmsg_reply(*pskb, info);
1855                 if (err)
1856                         return err;
1857         }
1858         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
1859         if (!*pskb)
1860                 return -ENOMEM;
1861         return 0;
1862 }
1863
1864 static int devlink_dpipe_tables_fill(struct genl_info *info,
1865                                      enum devlink_command cmd, int flags,
1866                                      struct list_head *dpipe_tables,
1867                                      const char *table_name)
1868 {
1869         struct devlink *devlink = info->user_ptr[0];
1870         struct devlink_dpipe_table *table;
1871         struct nlattr *tables_attr;
1872         struct sk_buff *skb = NULL;
1873         struct nlmsghdr *nlh;
1874         bool incomplete;
1875         void *hdr;
1876         int i;
1877         int err;
1878
1879         table = list_first_entry(dpipe_tables,
1880                                  struct devlink_dpipe_table, list);
1881 start_again:
1882         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1883         if (err)
1884                 return err;
1885
1886         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
1887                           &devlink_nl_family, NLM_F_MULTI, cmd);
1888         if (!hdr) {
1889                 nlmsg_free(skb);
1890                 return -EMSGSIZE;
1891         }
1892
1893         if (devlink_nl_put_handle(skb, devlink))
1894                 goto nla_put_failure;
1895         tables_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLES);
1896         if (!tables_attr)
1897                 goto nla_put_failure;
1898
1899         i = 0;
1900         incomplete = false;
1901         list_for_each_entry_from(table, dpipe_tables, list) {
1902                 if (!table_name) {
1903                         err = devlink_dpipe_table_put(skb, table);
1904                         if (err) {
1905                                 if (!i)
1906                                         goto err_table_put;
1907                                 incomplete = true;
1908                                 break;
1909                         }
1910                 } else {
1911                         if (!strcmp(table->name, table_name)) {
1912                                 err = devlink_dpipe_table_put(skb, table);
1913                                 if (err)
1914                                         break;
1915                         }
1916                 }
1917                 i++;
1918         }
1919
1920         nla_nest_end(skb, tables_attr);
1921         genlmsg_end(skb, hdr);
1922         if (incomplete)
1923                 goto start_again;
1924
1925 send_done:
1926         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
1927                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
1928         if (!nlh) {
1929                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1930                 if (err)
1931                         return err;
1932                 goto send_done;
1933         }
1934
1935         return genlmsg_reply(skb, info);
1936
1937 nla_put_failure:
1938         err = -EMSGSIZE;
1939 err_table_put:
1940         nlmsg_free(skb);
1941         return err;
1942 }
1943
1944 static int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb,
1945                                           struct genl_info *info)
1946 {
1947         struct devlink *devlink = info->user_ptr[0];
1948         const char *table_name =  NULL;
1949
1950         if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
1951                 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
1952
1953         return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0,
1954                                          &devlink->dpipe_table_list,
1955                                          table_name);
1956 }
1957
1958 static int devlink_dpipe_value_put(struct sk_buff *skb,
1959                                    struct devlink_dpipe_value *value)
1960 {
1961         if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE,
1962                     value->value_size, value->value))
1963                 return -EMSGSIZE;
1964         if (value->mask)
1965                 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK,
1966                             value->value_size, value->mask))
1967                         return -EMSGSIZE;
1968         if (value->mapping_valid)
1969                 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING,
1970                                 value->mapping_value))
1971                         return -EMSGSIZE;
1972         return 0;
1973 }
1974
1975 static int devlink_dpipe_action_value_put(struct sk_buff *skb,
1976                                           struct devlink_dpipe_value *value)
1977 {
1978         if (!value->action)
1979                 return -EINVAL;
1980         if (devlink_dpipe_action_put(skb, value->action))
1981                 return -EMSGSIZE;
1982         if (devlink_dpipe_value_put(skb, value))
1983                 return -EMSGSIZE;
1984         return 0;
1985 }
1986
1987 static int devlink_dpipe_action_values_put(struct sk_buff *skb,
1988                                            struct devlink_dpipe_value *values,
1989                                            unsigned int values_count)
1990 {
1991         struct nlattr *action_attr;
1992         int i;
1993         int err;
1994
1995         for (i = 0; i < values_count; i++) {
1996                 action_attr = nla_nest_start_noflag(skb,
1997                                                     DEVLINK_ATTR_DPIPE_ACTION_VALUE);
1998                 if (!action_attr)
1999                         return -EMSGSIZE;
2000                 err = devlink_dpipe_action_value_put(skb, &values[i]);
2001                 if (err)
2002                         goto err_action_value_put;
2003                 nla_nest_end(skb, action_attr);
2004         }
2005         return 0;
2006
2007 err_action_value_put:
2008         nla_nest_cancel(skb, action_attr);
2009         return err;
2010 }
2011
2012 static int devlink_dpipe_match_value_put(struct sk_buff *skb,
2013                                          struct devlink_dpipe_value *value)
2014 {
2015         if (!value->match)
2016                 return -EINVAL;
2017         if (devlink_dpipe_match_put(skb, value->match))
2018                 return -EMSGSIZE;
2019         if (devlink_dpipe_value_put(skb, value))
2020                 return -EMSGSIZE;
2021         return 0;
2022 }
2023
2024 static int devlink_dpipe_match_values_put(struct sk_buff *skb,
2025                                           struct devlink_dpipe_value *values,
2026                                           unsigned int values_count)
2027 {
2028         struct nlattr *match_attr;
2029         int i;
2030         int err;
2031
2032         for (i = 0; i < values_count; i++) {
2033                 match_attr = nla_nest_start_noflag(skb,
2034                                                    DEVLINK_ATTR_DPIPE_MATCH_VALUE);
2035                 if (!match_attr)
2036                         return -EMSGSIZE;
2037                 err = devlink_dpipe_match_value_put(skb, &values[i]);
2038                 if (err)
2039                         goto err_match_value_put;
2040                 nla_nest_end(skb, match_attr);
2041         }
2042         return 0;
2043
2044 err_match_value_put:
2045         nla_nest_cancel(skb, match_attr);
2046         return err;
2047 }
2048
2049 static int devlink_dpipe_entry_put(struct sk_buff *skb,
2050                                    struct devlink_dpipe_entry *entry)
2051 {
2052         struct nlattr *entry_attr, *matches_attr, *actions_attr;
2053         int err;
2054
2055         entry_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ENTRY);
2056         if (!entry_attr)
2057                 return  -EMSGSIZE;
2058
2059         if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index,
2060                               DEVLINK_ATTR_PAD))
2061                 goto nla_put_failure;
2062         if (entry->counter_valid)
2063                 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER,
2064                                       entry->counter, DEVLINK_ATTR_PAD))
2065                         goto nla_put_failure;
2066
2067         matches_attr = nla_nest_start_noflag(skb,
2068                                              DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES);
2069         if (!matches_attr)
2070                 goto nla_put_failure;
2071
2072         err = devlink_dpipe_match_values_put(skb, entry->match_values,
2073                                              entry->match_values_count);
2074         if (err) {
2075                 nla_nest_cancel(skb, matches_attr);
2076                 goto err_match_values_put;
2077         }
2078         nla_nest_end(skb, matches_attr);
2079
2080         actions_attr = nla_nest_start_noflag(skb,
2081                                              DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES);
2082         if (!actions_attr)
2083                 goto nla_put_failure;
2084
2085         err = devlink_dpipe_action_values_put(skb, entry->action_values,
2086                                               entry->action_values_count);
2087         if (err) {
2088                 nla_nest_cancel(skb, actions_attr);
2089                 goto err_action_values_put;
2090         }
2091         nla_nest_end(skb, actions_attr);
2092
2093         nla_nest_end(skb, entry_attr);
2094         return 0;
2095
2096 nla_put_failure:
2097         err = -EMSGSIZE;
2098 err_match_values_put:
2099 err_action_values_put:
2100         nla_nest_cancel(skb, entry_attr);
2101         return err;
2102 }
2103
2104 static struct devlink_dpipe_table *
2105 devlink_dpipe_table_find(struct list_head *dpipe_tables,
2106                          const char *table_name)
2107 {
2108         struct devlink_dpipe_table *table;
2109
2110         list_for_each_entry_rcu(table, dpipe_tables, list) {
2111                 if (!strcmp(table->name, table_name))
2112                         return table;
2113         }
2114         return NULL;
2115 }
2116
2117 int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
2118 {
2119         struct devlink *devlink;
2120         int err;
2121
2122         err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb,
2123                                                dump_ctx->info);
2124         if (err)
2125                 return err;
2126
2127         dump_ctx->hdr = genlmsg_put(dump_ctx->skb,
2128                                     dump_ctx->info->snd_portid,
2129                                     dump_ctx->info->snd_seq,
2130                                     &devlink_nl_family, NLM_F_MULTI,
2131                                     dump_ctx->cmd);
2132         if (!dump_ctx->hdr)
2133                 goto nla_put_failure;
2134
2135         devlink = dump_ctx->info->user_ptr[0];
2136         if (devlink_nl_put_handle(dump_ctx->skb, devlink))
2137                 goto nla_put_failure;
2138         dump_ctx->nest = nla_nest_start_noflag(dump_ctx->skb,
2139                                                DEVLINK_ATTR_DPIPE_ENTRIES);
2140         if (!dump_ctx->nest)
2141                 goto nla_put_failure;
2142         return 0;
2143
2144 nla_put_failure:
2145         nlmsg_free(dump_ctx->skb);
2146         return -EMSGSIZE;
2147 }
2148 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare);
2149
2150 int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
2151                                    struct devlink_dpipe_entry *entry)
2152 {
2153         return devlink_dpipe_entry_put(dump_ctx->skb, entry);
2154 }
2155 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append);
2156
2157 int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
2158 {
2159         nla_nest_end(dump_ctx->skb, dump_ctx->nest);
2160         genlmsg_end(dump_ctx->skb, dump_ctx->hdr);
2161         return 0;
2162 }
2163 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close);
2164
2165 void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry)
2166
2167 {
2168         unsigned int value_count, value_index;
2169         struct devlink_dpipe_value *value;
2170
2171         value = entry->action_values;
2172         value_count = entry->action_values_count;
2173         for (value_index = 0; value_index < value_count; value_index++) {
2174                 kfree(value[value_index].value);
2175                 kfree(value[value_index].mask);
2176         }
2177
2178         value = entry->match_values;
2179         value_count = entry->match_values_count;
2180         for (value_index = 0; value_index < value_count; value_index++) {
2181                 kfree(value[value_index].value);
2182                 kfree(value[value_index].mask);
2183         }
2184 }
2185 EXPORT_SYMBOL(devlink_dpipe_entry_clear);
2186
2187 static int devlink_dpipe_entries_fill(struct genl_info *info,
2188                                       enum devlink_command cmd, int flags,
2189                                       struct devlink_dpipe_table *table)
2190 {
2191         struct devlink_dpipe_dump_ctx dump_ctx;
2192         struct nlmsghdr *nlh;
2193         int err;
2194
2195         dump_ctx.skb = NULL;
2196         dump_ctx.cmd = cmd;
2197         dump_ctx.info = info;
2198
2199         err = table->table_ops->entries_dump(table->priv,
2200                                              table->counters_enabled,
2201                                              &dump_ctx);
2202         if (err)
2203                 return err;
2204
2205 send_done:
2206         nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq,
2207                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2208         if (!nlh) {
2209                 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info);
2210                 if (err)
2211                         return err;
2212                 goto send_done;
2213         }
2214         return genlmsg_reply(dump_ctx.skb, info);
2215 }
2216
2217 static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
2218                                             struct genl_info *info)
2219 {
2220         struct devlink *devlink = info->user_ptr[0];
2221         struct devlink_dpipe_table *table;
2222         const char *table_name;
2223
2224         if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
2225                 return -EINVAL;
2226
2227         table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2228         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2229                                          table_name);
2230         if (!table)
2231                 return -EINVAL;
2232
2233         if (!table->table_ops->entries_dump)
2234                 return -EINVAL;
2235
2236         return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET,
2237                                           0, table);
2238 }
2239
2240 static int devlink_dpipe_fields_put(struct sk_buff *skb,
2241                                     const struct devlink_dpipe_header *header)
2242 {
2243         struct devlink_dpipe_field *field;
2244         struct nlattr *field_attr;
2245         int i;
2246
2247         for (i = 0; i < header->fields_count; i++) {
2248                 field = &header->fields[i];
2249                 field_attr = nla_nest_start_noflag(skb,
2250                                                    DEVLINK_ATTR_DPIPE_FIELD);
2251                 if (!field_attr)
2252                         return -EMSGSIZE;
2253                 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) ||
2254                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2255                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) ||
2256                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type))
2257                         goto nla_put_failure;
2258                 nla_nest_end(skb, field_attr);
2259         }
2260         return 0;
2261
2262 nla_put_failure:
2263         nla_nest_cancel(skb, field_attr);
2264         return -EMSGSIZE;
2265 }
2266
2267 static int devlink_dpipe_header_put(struct sk_buff *skb,
2268                                     struct devlink_dpipe_header *header)
2269 {
2270         struct nlattr *fields_attr, *header_attr;
2271         int err;
2272
2273         header_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADER);
2274         if (!header_attr)
2275                 return -EMSGSIZE;
2276
2277         if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) ||
2278             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2279             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2280                 goto nla_put_failure;
2281
2282         fields_attr = nla_nest_start_noflag(skb,
2283                                             DEVLINK_ATTR_DPIPE_HEADER_FIELDS);
2284         if (!fields_attr)
2285                 goto nla_put_failure;
2286
2287         err = devlink_dpipe_fields_put(skb, header);
2288         if (err) {
2289                 nla_nest_cancel(skb, fields_attr);
2290                 goto nla_put_failure;
2291         }
2292         nla_nest_end(skb, fields_attr);
2293         nla_nest_end(skb, header_attr);
2294         return 0;
2295
2296 nla_put_failure:
2297         err = -EMSGSIZE;
2298         nla_nest_cancel(skb, header_attr);
2299         return err;
2300 }
2301
2302 static int devlink_dpipe_headers_fill(struct genl_info *info,
2303                                       enum devlink_command cmd, int flags,
2304                                       struct devlink_dpipe_headers *
2305                                       dpipe_headers)
2306 {
2307         struct devlink *devlink = info->user_ptr[0];
2308         struct nlattr *headers_attr;
2309         struct sk_buff *skb = NULL;
2310         struct nlmsghdr *nlh;
2311         void *hdr;
2312         int i, j;
2313         int err;
2314
2315         i = 0;
2316 start_again:
2317         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2318         if (err)
2319                 return err;
2320
2321         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2322                           &devlink_nl_family, NLM_F_MULTI, cmd);
2323         if (!hdr) {
2324                 nlmsg_free(skb);
2325                 return -EMSGSIZE;
2326         }
2327
2328         if (devlink_nl_put_handle(skb, devlink))
2329                 goto nla_put_failure;
2330         headers_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADERS);
2331         if (!headers_attr)
2332                 goto nla_put_failure;
2333
2334         j = 0;
2335         for (; i < dpipe_headers->headers_count; i++) {
2336                 err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]);
2337                 if (err) {
2338                         if (!j)
2339                                 goto err_table_put;
2340                         break;
2341                 }
2342                 j++;
2343         }
2344         nla_nest_end(skb, headers_attr);
2345         genlmsg_end(skb, hdr);
2346         if (i != dpipe_headers->headers_count)
2347                 goto start_again;
2348
2349 send_done:
2350         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2351                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2352         if (!nlh) {
2353                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2354                 if (err)
2355                         return err;
2356                 goto send_done;
2357         }
2358         return genlmsg_reply(skb, info);
2359
2360 nla_put_failure:
2361         err = -EMSGSIZE;
2362 err_table_put:
2363         nlmsg_free(skb);
2364         return err;
2365 }
2366
2367 static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
2368                                             struct genl_info *info)
2369 {
2370         struct devlink *devlink = info->user_ptr[0];
2371
2372         if (!devlink->dpipe_headers)
2373                 return -EOPNOTSUPP;
2374         return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET,
2375                                           0, devlink->dpipe_headers);
2376 }
2377
2378 static int devlink_dpipe_table_counters_set(struct devlink *devlink,
2379                                             const char *table_name,
2380                                             bool enable)
2381 {
2382         struct devlink_dpipe_table *table;
2383
2384         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2385                                          table_name);
2386         if (!table)
2387                 return -EINVAL;
2388
2389         if (table->counter_control_extern)
2390                 return -EOPNOTSUPP;
2391
2392         if (!(table->counters_enabled ^ enable))
2393                 return 0;
2394
2395         table->counters_enabled = enable;
2396         if (table->table_ops->counters_set_update)
2397                 table->table_ops->counters_set_update(table->priv, enable);
2398         return 0;
2399 }
2400
2401 static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
2402                                                    struct genl_info *info)
2403 {
2404         struct devlink *devlink = info->user_ptr[0];
2405         const char *table_name;
2406         bool counters_enable;
2407
2408         if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] ||
2409             !info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED])
2410                 return -EINVAL;
2411
2412         table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2413         counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
2414
2415         return devlink_dpipe_table_counters_set(devlink, table_name,
2416                                                 counters_enable);
2417 }
2418
2419 static struct devlink_resource *
2420 devlink_resource_find(struct devlink *devlink,
2421                       struct devlink_resource *resource, u64 resource_id)
2422 {
2423         struct list_head *resource_list;
2424
2425         if (resource)
2426                 resource_list = &resource->resource_list;
2427         else
2428                 resource_list = &devlink->resource_list;
2429
2430         list_for_each_entry(resource, resource_list, list) {
2431                 struct devlink_resource *child_resource;
2432
2433                 if (resource->id == resource_id)
2434                         return resource;
2435
2436                 child_resource = devlink_resource_find(devlink, resource,
2437                                                        resource_id);
2438                 if (child_resource)
2439                         return child_resource;
2440         }
2441         return NULL;
2442 }
2443
2444 static void
2445 devlink_resource_validate_children(struct devlink_resource *resource)
2446 {
2447         struct devlink_resource *child_resource;
2448         bool size_valid = true;
2449         u64 parts_size = 0;
2450
2451         if (list_empty(&resource->resource_list))
2452                 goto out;
2453
2454         list_for_each_entry(child_resource, &resource->resource_list, list)
2455                 parts_size += child_resource->size_new;
2456
2457         if (parts_size > resource->size_new)
2458                 size_valid = false;
2459 out:
2460         resource->size_valid = size_valid;
2461 }
2462
2463 static int
2464 devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
2465                                struct netlink_ext_ack *extack)
2466 {
2467         u64 reminder;
2468         int err = 0;
2469
2470         if (size > resource->size_params.size_max) {
2471                 NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum");
2472                 err = -EINVAL;
2473         }
2474
2475         if (size < resource->size_params.size_min) {
2476                 NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum");
2477                 err = -EINVAL;
2478         }
2479
2480         div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
2481         if (reminder) {
2482                 NL_SET_ERR_MSG_MOD(extack, "Wrong granularity");
2483                 err = -EINVAL;
2484         }
2485
2486         return err;
2487 }
2488
2489 static int devlink_nl_cmd_resource_set(struct sk_buff *skb,
2490                                        struct genl_info *info)
2491 {
2492         struct devlink *devlink = info->user_ptr[0];
2493         struct devlink_resource *resource;
2494         u64 resource_id;
2495         u64 size;
2496         int err;
2497
2498         if (!info->attrs[DEVLINK_ATTR_RESOURCE_ID] ||
2499             !info->attrs[DEVLINK_ATTR_RESOURCE_SIZE])
2500                 return -EINVAL;
2501         resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);
2502
2503         resource = devlink_resource_find(devlink, NULL, resource_id);
2504         if (!resource)
2505                 return -EINVAL;
2506
2507         size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);
2508         err = devlink_resource_validate_size(resource, size, info->extack);
2509         if (err)
2510                 return err;
2511
2512         resource->size_new = size;
2513         devlink_resource_validate_children(resource);
2514         if (resource->parent)
2515                 devlink_resource_validate_children(resource->parent);
2516         return 0;
2517 }
2518
2519 static int
2520 devlink_resource_size_params_put(struct devlink_resource *resource,
2521                                  struct sk_buff *skb)
2522 {
2523         struct devlink_resource_size_params *size_params;
2524
2525         size_params = &resource->size_params;
2526         if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN,
2527                               size_params->size_granularity, DEVLINK_ATTR_PAD) ||
2528             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX,
2529                               size_params->size_max, DEVLINK_ATTR_PAD) ||
2530             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN,
2531                               size_params->size_min, DEVLINK_ATTR_PAD) ||
2532             nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))
2533                 return -EMSGSIZE;
2534         return 0;
2535 }
2536
2537 static int devlink_resource_occ_put(struct devlink_resource *resource,
2538                                     struct sk_buff *skb)
2539 {
2540         if (!resource->occ_get)
2541                 return 0;
2542         return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC,
2543                                  resource->occ_get(resource->occ_get_priv),
2544                                  DEVLINK_ATTR_PAD);
2545 }
2546
2547 static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
2548                                 struct devlink_resource *resource)
2549 {
2550         struct devlink_resource *child_resource;
2551         struct nlattr *child_resource_attr;
2552         struct nlattr *resource_attr;
2553
2554         resource_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE);
2555         if (!resource_attr)
2556                 return -EMSGSIZE;
2557
2558         if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
2559             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,
2560                               DEVLINK_ATTR_PAD) ||
2561             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,
2562                               DEVLINK_ATTR_PAD))
2563                 goto nla_put_failure;
2564         if (resource->size != resource->size_new)
2565                 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW,
2566                                   resource->size_new, DEVLINK_ATTR_PAD);
2567         if (devlink_resource_occ_put(resource, skb))
2568                 goto nla_put_failure;
2569         if (devlink_resource_size_params_put(resource, skb))
2570                 goto nla_put_failure;
2571         if (list_empty(&resource->resource_list))
2572                 goto out;
2573
2574         if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID,
2575                        resource->size_valid))
2576                 goto nla_put_failure;
2577
2578         child_resource_attr = nla_nest_start_noflag(skb,
2579                                                     DEVLINK_ATTR_RESOURCE_LIST);
2580         if (!child_resource_attr)
2581                 goto nla_put_failure;
2582
2583         list_for_each_entry(child_resource, &resource->resource_list, list) {
2584                 if (devlink_resource_put(devlink, skb, child_resource))
2585                         goto resource_put_failure;
2586         }
2587
2588         nla_nest_end(skb, child_resource_attr);
2589 out:
2590         nla_nest_end(skb, resource_attr);
2591         return 0;
2592
2593 resource_put_failure:
2594         nla_nest_cancel(skb, child_resource_attr);
2595 nla_put_failure:
2596         nla_nest_cancel(skb, resource_attr);
2597         return -EMSGSIZE;
2598 }
2599
2600 static int devlink_resource_fill(struct genl_info *info,
2601                                  enum devlink_command cmd, int flags)
2602 {
2603         struct devlink *devlink = info->user_ptr[0];
2604         struct devlink_resource *resource;
2605         struct nlattr *resources_attr;
2606         struct sk_buff *skb = NULL;
2607         struct nlmsghdr *nlh;
2608         bool incomplete;
2609         void *hdr;
2610         int i;
2611         int err;
2612
2613         resource = list_first_entry(&devlink->resource_list,
2614                                     struct devlink_resource, list);
2615 start_again:
2616         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2617         if (err)
2618                 return err;
2619
2620         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2621                           &devlink_nl_family, NLM_F_MULTI, cmd);
2622         if (!hdr) {
2623                 nlmsg_free(skb);
2624                 return -EMSGSIZE;
2625         }
2626
2627         if (devlink_nl_put_handle(skb, devlink))
2628                 goto nla_put_failure;
2629
2630         resources_attr = nla_nest_start_noflag(skb,
2631                                                DEVLINK_ATTR_RESOURCE_LIST);
2632         if (!resources_attr)
2633                 goto nla_put_failure;
2634
2635         incomplete = false;
2636         i = 0;
2637         list_for_each_entry_from(resource, &devlink->resource_list, list) {
2638                 err = devlink_resource_put(devlink, skb, resource);
2639                 if (err) {
2640                         if (!i)
2641                                 goto err_resource_put;
2642                         incomplete = true;
2643                         break;
2644                 }
2645                 i++;
2646         }
2647         nla_nest_end(skb, resources_attr);
2648         genlmsg_end(skb, hdr);
2649         if (incomplete)
2650                 goto start_again;
2651 send_done:
2652         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2653                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2654         if (!nlh) {
2655                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2656                 if (err)
2657                         return err;
2658                 goto send_done;
2659         }
2660         return genlmsg_reply(skb, info);
2661
2662 nla_put_failure:
2663         err = -EMSGSIZE;
2664 err_resource_put:
2665         nlmsg_free(skb);
2666         return err;
2667 }
2668
2669 static int devlink_nl_cmd_resource_dump(struct sk_buff *skb,
2670                                         struct genl_info *info)
2671 {
2672         struct devlink *devlink = info->user_ptr[0];
2673
2674         if (list_empty(&devlink->resource_list))
2675                 return -EOPNOTSUPP;
2676
2677         return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
2678 }
2679
2680 static int
2681 devlink_resources_validate(struct devlink *devlink,
2682                            struct devlink_resource *resource,
2683                            struct genl_info *info)
2684 {
2685         struct list_head *resource_list;
2686         int err = 0;
2687
2688         if (resource)
2689                 resource_list = &resource->resource_list;
2690         else
2691                 resource_list = &devlink->resource_list;
2692
2693         list_for_each_entry(resource, resource_list, list) {
2694                 if (!resource->size_valid)
2695                         return -EINVAL;
2696                 err = devlink_resources_validate(devlink, resource, info);
2697                 if (err)
2698                         return err;
2699         }
2700         return err;
2701 }
2702
2703 static struct net *devlink_netns_get(struct sk_buff *skb,
2704                                      struct genl_info *info)
2705 {
2706         struct nlattr *netns_pid_attr = info->attrs[DEVLINK_ATTR_NETNS_PID];
2707         struct nlattr *netns_fd_attr = info->attrs[DEVLINK_ATTR_NETNS_FD];
2708         struct nlattr *netns_id_attr = info->attrs[DEVLINK_ATTR_NETNS_ID];
2709         struct net *net;
2710
2711         if (!!netns_pid_attr + !!netns_fd_attr + !!netns_id_attr > 1) {
2712                 NL_SET_ERR_MSG(info->extack, "multiple netns identifying attributes specified");
2713                 return ERR_PTR(-EINVAL);
2714         }
2715
2716         if (netns_pid_attr) {
2717                 net = get_net_ns_by_pid(nla_get_u32(netns_pid_attr));
2718         } else if (netns_fd_attr) {
2719                 net = get_net_ns_by_fd(nla_get_u32(netns_fd_attr));
2720         } else if (netns_id_attr) {
2721                 net = get_net_ns_by_id(sock_net(skb->sk),
2722                                        nla_get_u32(netns_id_attr));
2723                 if (!net)
2724                         net = ERR_PTR(-EINVAL);
2725         } else {
2726                 WARN_ON(1);
2727                 net = ERR_PTR(-EINVAL);
2728         }
2729         if (IS_ERR(net)) {
2730                 NL_SET_ERR_MSG(info->extack, "Unknown network namespace");
2731                 return ERR_PTR(-EINVAL);
2732         }
2733         if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
2734                 put_net(net);
2735                 return ERR_PTR(-EPERM);
2736         }
2737         return net;
2738 }
2739
2740 static void devlink_param_notify(struct devlink *devlink,
2741                                  unsigned int port_index,
2742                                  struct devlink_param_item *param_item,
2743                                  enum devlink_command cmd);
2744
2745 static void devlink_reload_netns_change(struct devlink *devlink,
2746                                         struct net *dest_net)
2747 {
2748         struct devlink_param_item *param_item;
2749
2750         /* Userspace needs to be notified about devlink objects
2751          * removed from original and entering new network namespace.
2752          * The rest of the devlink objects are re-created during
2753          * reload process so the notifications are generated separatelly.
2754          */
2755
2756         list_for_each_entry(param_item, &devlink->param_list, list)
2757                 devlink_param_notify(devlink, 0, param_item,
2758                                      DEVLINK_CMD_PARAM_DEL);
2759         devlink_notify(devlink, DEVLINK_CMD_DEL);
2760
2761         __devlink_net_set(devlink, dest_net);
2762
2763         devlink_notify(devlink, DEVLINK_CMD_NEW);
2764         list_for_each_entry(param_item, &devlink->param_list, list)
2765                 devlink_param_notify(devlink, 0, param_item,
2766                                      DEVLINK_CMD_PARAM_NEW);
2767 }
2768
2769 static bool devlink_reload_supported(struct devlink *devlink)
2770 {
2771         return devlink->ops->reload_down && devlink->ops->reload_up;
2772 }
2773
2774 static void devlink_reload_failed_set(struct devlink *devlink,
2775                                       bool reload_failed)
2776 {
2777         if (devlink->reload_failed == reload_failed)
2778                 return;
2779         devlink->reload_failed = reload_failed;
2780         devlink_notify(devlink, DEVLINK_CMD_NEW);
2781 }
2782
2783 bool devlink_is_reload_failed(const struct devlink *devlink)
2784 {
2785         return devlink->reload_failed;
2786 }
2787 EXPORT_SYMBOL_GPL(devlink_is_reload_failed);
2788
2789 static int devlink_reload(struct devlink *devlink, struct net *dest_net,
2790                           struct netlink_ext_ack *extack)
2791 {
2792         int err;
2793
2794         err = devlink->ops->reload_down(devlink, !!dest_net, extack);
2795         if (err)
2796                 return err;
2797
2798         if (dest_net && !net_eq(dest_net, devlink_net(devlink)))
2799                 devlink_reload_netns_change(devlink, dest_net);
2800
2801         err = devlink->ops->reload_up(devlink, extack);
2802         devlink_reload_failed_set(devlink, !!err);
2803         return err;
2804 }
2805
2806 static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
2807 {
2808         struct devlink *devlink = info->user_ptr[0];
2809         struct net *dest_net = NULL;
2810         int err;
2811
2812         if (!devlink_reload_supported(devlink))
2813                 return -EOPNOTSUPP;
2814
2815         err = devlink_resources_validate(devlink, NULL, info);
2816         if (err) {
2817                 NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed");
2818                 return err;
2819         }
2820
2821         if (info->attrs[DEVLINK_ATTR_NETNS_PID] ||
2822             info->attrs[DEVLINK_ATTR_NETNS_FD] ||
2823             info->attrs[DEVLINK_ATTR_NETNS_ID]) {
2824                 dest_net = devlink_netns_get(skb, info);
2825                 if (IS_ERR(dest_net))
2826                         return PTR_ERR(dest_net);
2827         }
2828
2829         err = devlink_reload(devlink, dest_net, info->extack);
2830
2831         if (dest_net)
2832                 put_net(dest_net);
2833
2834         return err;
2835 }
2836
2837 static int devlink_nl_flash_update_fill(struct sk_buff *msg,
2838                                         struct devlink *devlink,
2839                                         enum devlink_command cmd,
2840                                         const char *status_msg,
2841                                         const char *component,
2842                                         unsigned long done, unsigned long total)
2843 {
2844         void *hdr;
2845
2846         hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
2847         if (!hdr)
2848                 return -EMSGSIZE;
2849
2850         if (devlink_nl_put_handle(msg, devlink))
2851                 goto nla_put_failure;
2852
2853         if (cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS)
2854                 goto out;
2855
2856         if (status_msg &&
2857             nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_MSG,
2858                            status_msg))
2859                 goto nla_put_failure;
2860         if (component &&
2861             nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_COMPONENT,
2862                            component))
2863                 goto nla_put_failure;
2864         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE,
2865                               done, DEVLINK_ATTR_PAD))
2866                 goto nla_put_failure;
2867         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL,
2868                               total, DEVLINK_ATTR_PAD))
2869                 goto nla_put_failure;
2870
2871 out:
2872         genlmsg_end(msg, hdr);
2873         return 0;
2874
2875 nla_put_failure:
2876         genlmsg_cancel(msg, hdr);
2877         return -EMSGSIZE;
2878 }
2879
2880 static void __devlink_flash_update_notify(struct devlink *devlink,
2881                                           enum devlink_command cmd,
2882                                           const char *status_msg,
2883                                           const char *component,
2884                                           unsigned long done,
2885                                           unsigned long total)
2886 {
2887         struct sk_buff *msg;
2888         int err;
2889
2890         WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE &&
2891                 cmd != DEVLINK_CMD_FLASH_UPDATE_END &&
2892                 cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS);
2893
2894         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2895         if (!msg)
2896                 return;
2897
2898         err = devlink_nl_flash_update_fill(msg, devlink, cmd, status_msg,
2899                                            component, done, total);
2900         if (err)
2901                 goto out_free_msg;
2902
2903         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
2904                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
2905         return;
2906
2907 out_free_msg:
2908         nlmsg_free(msg);
2909 }
2910
2911 void devlink_flash_update_begin_notify(struct devlink *devlink)
2912 {
2913         __devlink_flash_update_notify(devlink,
2914                                       DEVLINK_CMD_FLASH_UPDATE,
2915                                       NULL, NULL, 0, 0);
2916 }
2917 EXPORT_SYMBOL_GPL(devlink_flash_update_begin_notify);
2918
2919 void devlink_flash_update_end_notify(struct devlink *devlink)
2920 {
2921         __devlink_flash_update_notify(devlink,
2922                                       DEVLINK_CMD_FLASH_UPDATE_END,
2923                                       NULL, NULL, 0, 0);
2924 }
2925 EXPORT_SYMBOL_GPL(devlink_flash_update_end_notify);
2926
2927 void devlink_flash_update_status_notify(struct devlink *devlink,
2928                                         const char *status_msg,
2929                                         const char *component,
2930                                         unsigned long done,
2931                                         unsigned long total)
2932 {
2933         __devlink_flash_update_notify(devlink,
2934                                       DEVLINK_CMD_FLASH_UPDATE_STATUS,
2935                                       status_msg, component, done, total);
2936 }
2937 EXPORT_SYMBOL_GPL(devlink_flash_update_status_notify);
2938
2939 static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
2940                                        struct genl_info *info)
2941 {
2942         struct devlink *devlink = info->user_ptr[0];
2943         const char *file_name, *component;
2944         struct nlattr *nla_component;
2945
2946         if (!devlink->ops->flash_update)
2947                 return -EOPNOTSUPP;
2948
2949         if (!info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME])
2950                 return -EINVAL;
2951         file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]);
2952
2953         nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT];
2954         component = nla_component ? nla_data(nla_component) : NULL;
2955
2956         return devlink->ops->flash_update(devlink, file_name, component,
2957                                           info->extack);
2958 }
2959
2960 static const struct devlink_param devlink_param_generic[] = {
2961         {
2962                 .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
2963                 .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME,
2964                 .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE,
2965         },
2966         {
2967                 .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
2968                 .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME,
2969                 .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE,
2970         },
2971         {
2972                 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
2973                 .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME,
2974                 .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE,
2975         },
2976         {
2977                 .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
2978                 .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
2979                 .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
2980         },
2981         {
2982                 .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
2983                 .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME,
2984                 .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE,
2985         },
2986         {
2987                 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
2988                 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME,
2989                 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE,
2990         },
2991         {
2992                 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
2993                 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME,
2994                 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE,
2995         },
2996         {
2997                 .id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
2998                 .name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME,
2999                 .type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE,
3000         },
3001         {
3002                 .id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE,
3003                 .name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME,
3004                 .type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE,
3005         },
3006 };
3007
3008 static int devlink_param_generic_verify(const struct devlink_param *param)
3009 {
3010         /* verify it match generic parameter by id and name */
3011         if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
3012                 return -EINVAL;
3013         if (strcmp(param->name, devlink_param_generic[param->id].name))
3014                 return -ENOENT;
3015
3016         WARN_ON(param->type != devlink_param_generic[param->id].type);
3017
3018         return 0;
3019 }
3020
3021 static int devlink_param_driver_verify(const struct devlink_param *param)
3022 {
3023         int i;
3024
3025         if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
3026                 return -EINVAL;
3027         /* verify no such name in generic params */
3028         for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
3029                 if (!strcmp(param->name, devlink_param_generic[i].name))
3030                         return -EEXIST;
3031
3032         return 0;
3033 }
3034
3035 static struct devlink_param_item *
3036 devlink_param_find_by_name(struct list_head *param_list,
3037                            const char *param_name)
3038 {
3039         struct devlink_param_item *param_item;
3040
3041         list_for_each_entry(param_item, param_list, list)
3042                 if (!strcmp(param_item->param->name, param_name))
3043                         return param_item;
3044         return NULL;
3045 }
3046
3047 static struct devlink_param_item *
3048 devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
3049 {
3050         struct devlink_param_item *param_item;
3051
3052         list_for_each_entry(param_item, param_list, list)
3053                 if (param_item->param->id == param_id)
3054                         return param_item;
3055         return NULL;
3056 }
3057
3058 static bool
3059 devlink_param_cmode_is_supported(const struct devlink_param *param,
3060                                  enum devlink_param_cmode cmode)
3061 {
3062         return test_bit(cmode, &param->supported_cmodes);
3063 }
3064
3065 static int devlink_param_get(struct devlink *devlink,
3066                              const struct devlink_param *param,
3067                              struct devlink_param_gset_ctx *ctx)
3068 {
3069         if (!param->get)
3070                 return -EOPNOTSUPP;
3071         return param->get(devlink, param->id, ctx);
3072 }
3073
3074 static int devlink_param_set(struct devlink *devlink,
3075                              const struct devlink_param *param,
3076                              struct devlink_param_gset_ctx *ctx)
3077 {
3078         if (!param->set)
3079                 return -EOPNOTSUPP;
3080         return param->set(devlink, param->id, ctx);
3081 }
3082
3083 static int
3084 devlink_param_type_to_nla_type(enum devlink_param_type param_type)
3085 {
3086         switch (param_type) {
3087         case DEVLINK_PARAM_TYPE_U8:
3088                 return NLA_U8;
3089         case DEVLINK_PARAM_TYPE_U16:
3090                 return NLA_U16;
3091         case DEVLINK_PARAM_TYPE_U32:
3092                 return NLA_U32;
3093         case DEVLINK_PARAM_TYPE_STRING:
3094                 return NLA_STRING;
3095         case DEVLINK_PARAM_TYPE_BOOL:
3096                 return NLA_FLAG;
3097         default:
3098                 return -EINVAL;
3099         }
3100 }
3101
3102 static int
3103 devlink_nl_param_value_fill_one(struct sk_buff *msg,
3104                                 enum devlink_param_type type,
3105                                 enum devlink_param_cmode cmode,
3106                                 union devlink_param_value val)
3107 {
3108         struct nlattr *param_value_attr;
3109
3110         param_value_attr = nla_nest_start_noflag(msg,
3111                                                  DEVLINK_ATTR_PARAM_VALUE);
3112         if (!param_value_attr)
3113                 goto nla_put_failure;
3114
3115         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
3116                 goto value_nest_cancel;
3117
3118         switch (type) {
3119         case DEVLINK_PARAM_TYPE_U8:
3120                 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
3121                         goto value_nest_cancel;
3122                 break;
3123         case DEVLINK_PARAM_TYPE_U16:
3124                 if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
3125                         goto value_nest_cancel;
3126                 break;
3127         case DEVLINK_PARAM_TYPE_U32:
3128                 if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
3129                         goto value_nest_cancel;
3130                 break;
3131         case DEVLINK_PARAM_TYPE_STRING:
3132                 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
3133                                    val.vstr))
3134                         goto value_nest_cancel;
3135                 break;
3136         case DEVLINK_PARAM_TYPE_BOOL:
3137                 if (val.vbool &&
3138                     nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
3139                         goto value_nest_cancel;
3140                 break;
3141         }
3142
3143         nla_nest_end(msg, param_value_attr);
3144         return 0;
3145
3146 value_nest_cancel:
3147         nla_nest_cancel(msg, param_value_attr);
3148 nla_put_failure:
3149         return -EMSGSIZE;
3150 }
3151
3152 static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
3153                                  unsigned int port_index,
3154                                  struct devlink_param_item *param_item,
3155                                  enum devlink_command cmd,
3156                                  u32 portid, u32 seq, int flags)
3157 {
3158         union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
3159         bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {};
3160         const struct devlink_param *param = param_item->param;
3161         struct devlink_param_gset_ctx ctx;
3162         struct nlattr *param_values_list;
3163         struct nlattr *param_attr;
3164         int nla_type;
3165         void *hdr;
3166         int err;
3167         int i;
3168
3169         /* Get value from driver part to driverinit configuration mode */
3170         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3171                 if (!devlink_param_cmode_is_supported(param, i))
3172                         continue;
3173                 if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3174                         if (!param_item->driverinit_value_valid)
3175                                 return -EOPNOTSUPP;
3176                         param_value[i] = param_item->driverinit_value;
3177                 } else {
3178                         if (!param_item->published)
3179                                 continue;
3180                         ctx.cmode = i;
3181                         err = devlink_param_get(devlink, param, &ctx);
3182                         if (err)
3183                                 return err;
3184                         param_value[i] = ctx.val;
3185                 }
3186                 param_value_set[i] = true;
3187         }
3188
3189         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3190         if (!hdr)
3191                 return -EMSGSIZE;
3192
3193         if (devlink_nl_put_handle(msg, devlink))
3194                 goto genlmsg_cancel;
3195
3196         if (cmd == DEVLINK_CMD_PORT_PARAM_GET ||
3197             cmd == DEVLINK_CMD_PORT_PARAM_NEW ||
3198             cmd == DEVLINK_CMD_PORT_PARAM_DEL)
3199                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index))
3200                         goto genlmsg_cancel;
3201
3202         param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM);
3203         if (!param_attr)
3204                 goto genlmsg_cancel;
3205         if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
3206                 goto param_nest_cancel;
3207         if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
3208                 goto param_nest_cancel;
3209
3210         nla_type = devlink_param_type_to_nla_type(param->type);
3211         if (nla_type < 0)
3212                 goto param_nest_cancel;
3213         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
3214                 goto param_nest_cancel;
3215
3216         param_values_list = nla_nest_start_noflag(msg,
3217                                                   DEVLINK_ATTR_PARAM_VALUES_LIST);
3218         if (!param_values_list)
3219                 goto param_nest_cancel;
3220
3221         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3222                 if (!param_value_set[i])
3223                         continue;
3224                 err = devlink_nl_param_value_fill_one(msg, param->type,
3225                                                       i, param_value[i]);
3226                 if (err)
3227                         goto values_list_nest_cancel;
3228         }
3229
3230         nla_nest_end(msg, param_values_list);
3231         nla_nest_end(msg, param_attr);
3232         genlmsg_end(msg, hdr);
3233         return 0;
3234
3235 values_list_nest_cancel:
3236         nla_nest_end(msg, param_values_list);
3237 param_nest_cancel:
3238         nla_nest_cancel(msg, param_attr);
3239 genlmsg_cancel:
3240         genlmsg_cancel(msg, hdr);
3241         return -EMSGSIZE;
3242 }
3243
3244 static void devlink_param_notify(struct devlink *devlink,
3245                                  unsigned int port_index,
3246                                  struct devlink_param_item *param_item,
3247                                  enum devlink_command cmd)
3248 {
3249         struct sk_buff *msg;
3250         int err;
3251
3252         WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL &&
3253                 cmd != DEVLINK_CMD_PORT_PARAM_NEW &&
3254                 cmd != DEVLINK_CMD_PORT_PARAM_DEL);
3255
3256         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3257         if (!msg)
3258                 return;
3259         err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd,
3260                                     0, 0, 0);
3261         if (err) {
3262                 nlmsg_free(msg);
3263                 return;
3264         }
3265
3266         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3267                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3268 }
3269
3270 static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
3271                                            struct netlink_callback *cb)
3272 {
3273         struct devlink_param_item *param_item;
3274         struct devlink *devlink;
3275         int start = cb->args[0];
3276         int idx = 0;
3277         int err = 0;
3278
3279         mutex_lock(&devlink_mutex);
3280         list_for_each_entry(devlink, &devlink_list, list) {
3281                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3282                         continue;
3283                 mutex_lock(&devlink->lock);
3284                 list_for_each_entry(param_item, &devlink->param_list, list) {
3285                         if (idx < start) {
3286                                 idx++;
3287                                 continue;
3288                         }
3289                         err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3290                                                     DEVLINK_CMD_PARAM_GET,
3291                                                     NETLINK_CB(cb->skb).portid,
3292                                                     cb->nlh->nlmsg_seq,
3293                                                     NLM_F_MULTI);
3294                         if (err && err != -EOPNOTSUPP) {
3295                                 mutex_unlock(&devlink->lock);
3296                                 goto out;
3297                         }
3298                         idx++;
3299                 }
3300                 mutex_unlock(&devlink->lock);
3301         }
3302 out:
3303         mutex_unlock(&devlink_mutex);
3304
3305         if (err != -EMSGSIZE)
3306                 return err;
3307
3308         cb->args[0] = idx;
3309         return msg->len;
3310 }
3311
3312 static int
3313 devlink_param_type_get_from_info(struct genl_info *info,
3314                                  enum devlink_param_type *param_type)
3315 {
3316         if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE])
3317                 return -EINVAL;
3318
3319         switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
3320         case NLA_U8:
3321                 *param_type = DEVLINK_PARAM_TYPE_U8;
3322                 break;
3323         case NLA_U16:
3324                 *param_type = DEVLINK_PARAM_TYPE_U16;
3325                 break;
3326         case NLA_U32:
3327                 *param_type = DEVLINK_PARAM_TYPE_U32;
3328                 break;
3329         case NLA_STRING:
3330                 *param_type = DEVLINK_PARAM_TYPE_STRING;
3331                 break;
3332         case NLA_FLAG:
3333                 *param_type = DEVLINK_PARAM_TYPE_BOOL;
3334                 break;
3335         default:
3336                 return -EINVAL;
3337         }
3338
3339         return 0;
3340 }
3341
3342 static int
3343 devlink_param_value_get_from_info(const struct devlink_param *param,
3344                                   struct genl_info *info,
3345                                   union devlink_param_value *value)
3346 {
3347         int len;
3348
3349         if (param->type != DEVLINK_PARAM_TYPE_BOOL &&
3350             !info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA])
3351                 return -EINVAL;
3352
3353         switch (param->type) {
3354         case DEVLINK_PARAM_TYPE_U8:
3355                 value->vu8 = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3356                 break;
3357         case DEVLINK_PARAM_TYPE_U16:
3358                 value->vu16 = nla_get_u16(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3359                 break;
3360         case DEVLINK_PARAM_TYPE_U32:
3361                 value->vu32 = nla_get_u32(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3362                 break;
3363         case DEVLINK_PARAM_TYPE_STRING:
3364                 len = strnlen(nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]),
3365                               nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3366                 if (len == nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) ||
3367                     len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
3368                         return -EINVAL;
3369                 strcpy(value->vstr,
3370                        nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3371                 break;
3372         case DEVLINK_PARAM_TYPE_BOOL:
3373                 value->vbool = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA] ?
3374                                true : false;
3375                 break;
3376         }
3377         return 0;
3378 }
3379
3380 static struct devlink_param_item *
3381 devlink_param_get_from_info(struct list_head *param_list,
3382                             struct genl_info *info)
3383 {
3384         char *param_name;
3385
3386         if (!info->attrs[DEVLINK_ATTR_PARAM_NAME])
3387                 return NULL;
3388
3389         param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
3390         return devlink_param_find_by_name(param_list, param_name);
3391 }
3392
3393 static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
3394                                          struct genl_info *info)
3395 {
3396         struct devlink *devlink = info->user_ptr[0];
3397         struct devlink_param_item *param_item;
3398         struct sk_buff *msg;
3399         int err;
3400
3401         param_item = devlink_param_get_from_info(&devlink->param_list, info);
3402         if (!param_item)
3403                 return -EINVAL;
3404
3405         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3406         if (!msg)
3407                 return -ENOMEM;
3408
3409         err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3410                                     DEVLINK_CMD_PARAM_GET,
3411                                     info->snd_portid, info->snd_seq, 0);
3412         if (err) {
3413                 nlmsg_free(msg);
3414                 return err;
3415         }
3416
3417         return genlmsg_reply(msg, info);
3418 }
3419
3420 static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink,
3421                                            unsigned int port_index,
3422                                            struct list_head *param_list,
3423                                            struct genl_info *info,
3424                                            enum devlink_command cmd)
3425 {
3426         enum devlink_param_type param_type;
3427         struct devlink_param_gset_ctx ctx;
3428         enum devlink_param_cmode cmode;
3429         struct devlink_param_item *param_item;
3430         const struct devlink_param *param;
3431         union devlink_param_value value;
3432         int err = 0;
3433
3434         param_item = devlink_param_get_from_info(param_list, info);
3435         if (!param_item)
3436                 return -EINVAL;
3437         param = param_item->param;
3438         err = devlink_param_type_get_from_info(info, &param_type);
3439         if (err)
3440                 return err;
3441         if (param_type != param->type)
3442                 return -EINVAL;
3443         err = devlink_param_value_get_from_info(param, info, &value);
3444         if (err)
3445                 return err;
3446         if (param->validate) {
3447                 err = param->validate(devlink, param->id, value, info->extack);
3448                 if (err)
3449                         return err;
3450         }
3451
3452         if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE])
3453                 return -EINVAL;
3454         cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
3455         if (!devlink_param_cmode_is_supported(param, cmode))
3456                 return -EOPNOTSUPP;
3457
3458         if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3459                 if (param->type == DEVLINK_PARAM_TYPE_STRING)
3460                         strcpy(param_item->driverinit_value.vstr, value.vstr);
3461                 else
3462                         param_item->driverinit_value = value;
3463                 param_item->driverinit_value_valid = true;
3464         } else {
3465                 if (!param->set)
3466                         return -EOPNOTSUPP;
3467                 ctx.val = value;
3468                 ctx.cmode = cmode;
3469                 err = devlink_param_set(devlink, param, &ctx);
3470                 if (err)
3471                         return err;
3472         }
3473
3474         devlink_param_notify(devlink, port_index, param_item, cmd);
3475         return 0;
3476 }
3477
3478 static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
3479                                          struct genl_info *info)
3480 {
3481         struct devlink *devlink = info->user_ptr[0];
3482
3483         return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->param_list,
3484                                                info, DEVLINK_CMD_PARAM_NEW);
3485 }
3486
3487 static int devlink_param_register_one(struct devlink *devlink,
3488                                       unsigned int port_index,
3489                                       struct list_head *param_list,
3490                                       const struct devlink_param *param,
3491                                       enum devlink_command cmd)
3492 {
3493         struct devlink_param_item *param_item;
3494
3495         if (devlink_param_find_by_name(param_list, param->name))
3496                 return -EEXIST;
3497
3498         if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
3499                 WARN_ON(param->get || param->set);
3500         else
3501                 WARN_ON(!param->get || !param->set);
3502
3503         param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
3504         if (!param_item)
3505                 return -ENOMEM;
3506         param_item->param = param;
3507
3508         list_add_tail(&param_item->list, param_list);
3509         devlink_param_notify(devlink, port_index, param_item, cmd);
3510         return 0;
3511 }
3512
3513 static void devlink_param_unregister_one(struct devlink *devlink,
3514                                          unsigned int port_index,
3515                                          struct list_head *param_list,
3516                                          const struct devlink_param *param,
3517                                          enum devlink_command cmd)
3518 {
3519         struct devlink_param_item *param_item;
3520
3521         param_item = devlink_param_find_by_name(param_list, param->name);
3522         WARN_ON(!param_item);
3523         devlink_param_notify(devlink, port_index, param_item, cmd);
3524         list_del(&param_item->list);
3525         kfree(param_item);
3526 }
3527
3528 static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg,
3529                                                 struct netlink_callback *cb)
3530 {
3531         struct devlink_param_item *param_item;
3532         struct devlink_port *devlink_port;
3533         struct devlink *devlink;
3534         int start = cb->args[0];
3535         int idx = 0;
3536         int err = 0;
3537
3538         mutex_lock(&devlink_mutex);
3539         list_for_each_entry(devlink, &devlink_list, list) {
3540                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3541                         continue;
3542                 mutex_lock(&devlink->lock);
3543                 list_for_each_entry(devlink_port, &devlink->port_list, list) {
3544                         list_for_each_entry(param_item,
3545                                             &devlink_port->param_list, list) {
3546                                 if (idx < start) {
3547                                         idx++;
3548                                         continue;
3549                                 }
3550                                 err = devlink_nl_param_fill(msg,
3551                                                 devlink_port->devlink,
3552                                                 devlink_port->index, param_item,
3553                                                 DEVLINK_CMD_PORT_PARAM_GET,
3554                                                 NETLINK_CB(cb->skb).portid,
3555                                                 cb->nlh->nlmsg_seq,
3556                                                 NLM_F_MULTI);
3557                                 if (err && err != -EOPNOTSUPP) {
3558                                         mutex_unlock(&devlink->lock);
3559                                         goto out;
3560                                 }
3561                                 idx++;
3562                         }
3563                 }
3564                 mutex_unlock(&devlink->lock);
3565         }
3566 out:
3567         mutex_unlock(&devlink_mutex);
3568
3569         if (err != -EMSGSIZE)
3570                 return err;
3571
3572         cb->args[0] = idx;
3573         return msg->len;
3574 }
3575
3576 static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
3577                                               struct genl_info *info)
3578 {
3579         struct devlink_port *devlink_port = info->user_ptr[0];
3580         struct devlink_param_item *param_item;
3581         struct sk_buff *msg;
3582         int err;
3583
3584         param_item = devlink_param_get_from_info(&devlink_port->param_list,
3585                                                  info);
3586         if (!param_item)
3587                 return -EINVAL;
3588
3589         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3590         if (!msg)
3591                 return -ENOMEM;
3592
3593         err = devlink_nl_param_fill(msg, devlink_port->devlink,
3594                                     devlink_port->index, param_item,
3595                                     DEVLINK_CMD_PORT_PARAM_GET,
3596                                     info->snd_portid, info->snd_seq, 0);
3597         if (err) {
3598                 nlmsg_free(msg);
3599                 return err;
3600         }
3601
3602         return genlmsg_reply(msg, info);
3603 }
3604
3605 static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
3606                                               struct genl_info *info)
3607 {
3608         struct devlink_port *devlink_port = info->user_ptr[0];
3609
3610         return __devlink_nl_cmd_param_set_doit(devlink_port->devlink,
3611                                                devlink_port->index,
3612                                                &devlink_port->param_list, info,
3613                                                DEVLINK_CMD_PORT_PARAM_NEW);
3614 }
3615
3616 static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
3617                                              struct devlink *devlink,
3618                                              struct devlink_snapshot *snapshot)
3619 {
3620         struct nlattr *snap_attr;
3621         int err;
3622
3623         snap_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
3624         if (!snap_attr)
3625                 return -EINVAL;
3626
3627         err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
3628         if (err)
3629                 goto nla_put_failure;
3630
3631         nla_nest_end(msg, snap_attr);
3632         return 0;
3633
3634 nla_put_failure:
3635         nla_nest_cancel(msg, snap_attr);
3636         return err;
3637 }
3638
3639 static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
3640                                               struct devlink *devlink,
3641                                               struct devlink_region *region)
3642 {
3643         struct devlink_snapshot *snapshot;
3644         struct nlattr *snapshots_attr;
3645         int err;
3646
3647         snapshots_attr = nla_nest_start_noflag(msg,
3648                                                DEVLINK_ATTR_REGION_SNAPSHOTS);
3649         if (!snapshots_attr)
3650                 return -EINVAL;
3651
3652         list_for_each_entry(snapshot, &region->snapshot_list, list) {
3653                 err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
3654                 if (err)
3655                         goto nla_put_failure;
3656         }
3657
3658         nla_nest_end(msg, snapshots_attr);
3659         return 0;
3660
3661 nla_put_failure:
3662         nla_nest_cancel(msg, snapshots_attr);
3663         return err;
3664 }
3665
3666 static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
3667                                   enum devlink_command cmd, u32 portid,
3668                                   u32 seq, int flags,
3669                                   struct devlink_region *region)
3670 {
3671         void *hdr;
3672         int err;
3673
3674         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3675         if (!hdr)
3676                 return -EMSGSIZE;
3677
3678         err = devlink_nl_put_handle(msg, devlink);
3679         if (err)
3680                 goto nla_put_failure;
3681
3682         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->name);
3683         if (err)
3684                 goto nla_put_failure;
3685
3686         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3687                                 region->size,
3688                                 DEVLINK_ATTR_PAD);
3689         if (err)
3690                 goto nla_put_failure;
3691
3692         err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
3693         if (err)
3694                 goto nla_put_failure;
3695
3696         genlmsg_end(msg, hdr);
3697         return 0;
3698
3699 nla_put_failure:
3700         genlmsg_cancel(msg, hdr);
3701         return err;
3702 }
3703
3704 static void devlink_nl_region_notify(struct devlink_region *region,
3705                                      struct devlink_snapshot *snapshot,
3706                                      enum devlink_command cmd)
3707 {
3708         struct devlink *devlink = region->devlink;
3709         struct sk_buff *msg;
3710         void *hdr;
3711         int err;
3712
3713         WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
3714
3715         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3716         if (!msg)
3717                 return;
3718
3719         hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
3720         if (!hdr)
3721                 goto out_free_msg;
3722
3723         err = devlink_nl_put_handle(msg, devlink);
3724         if (err)
3725                 goto out_cancel_msg;
3726
3727         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
3728                              region->name);
3729         if (err)
3730                 goto out_cancel_msg;
3731
3732         if (snapshot) {
3733                 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
3734                                   snapshot->id);
3735                 if (err)
3736                         goto out_cancel_msg;
3737         } else {
3738                 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3739                                         region->size, DEVLINK_ATTR_PAD);
3740                 if (err)
3741                         goto out_cancel_msg;
3742         }
3743         genlmsg_end(msg, hdr);
3744
3745         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3746                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3747
3748         return;
3749
3750 out_cancel_msg:
3751         genlmsg_cancel(msg, hdr);
3752 out_free_msg:
3753         nlmsg_free(msg);
3754 }
3755
3756 static void devlink_region_snapshot_del(struct devlink_region *region,
3757                                         struct devlink_snapshot *snapshot)
3758 {
3759         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
3760         region->cur_snapshots--;
3761         list_del(&snapshot->list);
3762         (*snapshot->data_destructor)(snapshot->data);
3763         kfree(snapshot);
3764 }
3765
3766 static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
3767                                           struct genl_info *info)
3768 {
3769         struct devlink *devlink = info->user_ptr[0];
3770         struct devlink_region *region;
3771         const char *region_name;
3772         struct sk_buff *msg;
3773         int err;
3774
3775         if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
3776                 return -EINVAL;
3777
3778         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3779         region = devlink_region_get_by_name(devlink, region_name);
3780         if (!region)
3781                 return -EINVAL;
3782
3783         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3784         if (!msg)
3785                 return -ENOMEM;
3786
3787         err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
3788                                      info->snd_portid, info->snd_seq, 0,
3789                                      region);
3790         if (err) {
3791                 nlmsg_free(msg);
3792                 return err;
3793         }
3794
3795         return genlmsg_reply(msg, info);
3796 }
3797
3798 static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
3799                                             struct netlink_callback *cb)
3800 {
3801         struct devlink_region *region;
3802         struct devlink *devlink;
3803         int start = cb->args[0];
3804         int idx = 0;
3805         int err;
3806
3807         mutex_lock(&devlink_mutex);
3808         list_for_each_entry(devlink, &devlink_list, list) {
3809                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3810                         continue;
3811
3812                 mutex_lock(&devlink->lock);
3813                 list_for_each_entry(region, &devlink->region_list, list) {
3814                         if (idx < start) {
3815                                 idx++;
3816                                 continue;
3817                         }
3818                         err = devlink_nl_region_fill(msg, devlink,
3819                                                      DEVLINK_CMD_REGION_GET,
3820                                                      NETLINK_CB(cb->skb).portid,
3821                                                      cb->nlh->nlmsg_seq,
3822                                                      NLM_F_MULTI, region);
3823                         if (err) {
3824                                 mutex_unlock(&devlink->lock);
3825                                 goto out;
3826                         }
3827                         idx++;
3828                 }
3829                 mutex_unlock(&devlink->lock);
3830         }
3831 out:
3832         mutex_unlock(&devlink_mutex);
3833         cb->args[0] = idx;
3834         return msg->len;
3835 }
3836
3837 static int devlink_nl_cmd_region_del(struct sk_buff *skb,
3838                                      struct genl_info *info)
3839 {
3840         struct devlink *devlink = info->user_ptr[0];
3841         struct devlink_snapshot *snapshot;
3842         struct devlink_region *region;
3843         const char *region_name;
3844         u32 snapshot_id;
3845
3846         if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
3847             !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
3848                 return -EINVAL;
3849
3850         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3851         snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3852
3853         region = devlink_region_get_by_name(devlink, region_name);
3854         if (!region)
3855                 return -EINVAL;
3856
3857         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3858         if (!snapshot)
3859                 return -EINVAL;
3860
3861         devlink_region_snapshot_del(region, snapshot);
3862         return 0;
3863 }
3864
3865 static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
3866                                                  struct devlink *devlink,
3867                                                  u8 *chunk, u32 chunk_size,
3868                                                  u64 addr)
3869 {
3870         struct nlattr *chunk_attr;
3871         int err;
3872
3873         chunk_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_CHUNK);
3874         if (!chunk_attr)
3875                 return -EINVAL;
3876
3877         err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
3878         if (err)
3879                 goto nla_put_failure;
3880
3881         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
3882                                 DEVLINK_ATTR_PAD);
3883         if (err)
3884                 goto nla_put_failure;
3885
3886         nla_nest_end(msg, chunk_attr);
3887         return 0;
3888
3889 nla_put_failure:
3890         nla_nest_cancel(msg, chunk_attr);
3891         return err;
3892 }
3893
3894 #define DEVLINK_REGION_READ_CHUNK_SIZE 256
3895
3896 static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
3897                                                 struct devlink *devlink,
3898                                                 struct devlink_region *region,
3899                                                 struct nlattr **attrs,
3900                                                 u64 start_offset,
3901                                                 u64 end_offset,
3902                                                 bool dump,
3903                                                 u64 *new_offset)
3904 {
3905         struct devlink_snapshot *snapshot;
3906         u64 curr_offset = start_offset;
3907         u32 snapshot_id;
3908         int err = 0;
3909
3910         *new_offset = start_offset;
3911
3912         snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3913         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3914         if (!snapshot)
3915                 return -EINVAL;
3916
3917         if (end_offset > region->size || dump)
3918                 end_offset = region->size;
3919
3920         while (curr_offset < end_offset) {
3921                 u32 data_size;
3922                 u8 *data;
3923
3924                 if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
3925                         data_size = end_offset - curr_offset;
3926                 else
3927                         data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
3928
3929                 data = &snapshot->data[curr_offset];
3930                 err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
3931                                                             data, data_size,
3932                                                             curr_offset);
3933                 if (err)
3934                         break;
3935
3936                 curr_offset += data_size;
3937         }
3938         *new_offset = curr_offset;
3939
3940         return err;
3941 }
3942
3943 static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
3944                                              struct netlink_callback *cb)
3945 {
3946         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
3947         u64 ret_offset, start_offset, end_offset = 0;
3948         struct nlattr **attrs = info->attrs;
3949         struct devlink_region *region;
3950         struct nlattr *chunks_attr;
3951         const char *region_name;
3952         struct devlink *devlink;
3953         bool dump = true;
3954         void *hdr;
3955         int err;
3956
3957         start_offset = *((u64 *)&cb->args[0]);
3958
3959         mutex_lock(&devlink_mutex);
3960         devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
3961         if (IS_ERR(devlink)) {
3962                 err = PTR_ERR(devlink);
3963                 goto out_dev;
3964         }
3965
3966         mutex_lock(&devlink->lock);
3967
3968         if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
3969             !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
3970                 err = -EINVAL;
3971                 goto out_unlock;
3972         }
3973
3974         region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
3975         region = devlink_region_get_by_name(devlink, region_name);
3976         if (!region) {
3977                 err = -EINVAL;
3978                 goto out_unlock;
3979         }
3980
3981         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3982                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
3983                           DEVLINK_CMD_REGION_READ);
3984         if (!hdr) {
3985                 err = -EMSGSIZE;
3986                 goto out_unlock;
3987         }
3988
3989         err = devlink_nl_put_handle(skb, devlink);
3990         if (err)
3991                 goto nla_put_failure;
3992
3993         err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
3994         if (err)
3995                 goto nla_put_failure;
3996
3997         chunks_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_REGION_CHUNKS);
3998         if (!chunks_attr) {
3999                 err = -EMSGSIZE;
4000                 goto nla_put_failure;
4001         }
4002
4003         if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
4004             attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
4005                 if (!start_offset)
4006                         start_offset =
4007                                 nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4008
4009                 end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4010                 end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
4011                 dump = false;
4012         }
4013
4014         err = devlink_nl_region_read_snapshot_fill(skb, devlink,
4015                                                    region, attrs,
4016                                                    start_offset,
4017                                                    end_offset, dump,
4018                                                    &ret_offset);
4019
4020         if (err && err != -EMSGSIZE)
4021                 goto nla_put_failure;
4022
4023         /* Check if there was any progress done to prevent infinite loop */
4024         if (ret_offset == start_offset) {
4025                 err = -EINVAL;
4026                 goto nla_put_failure;
4027         }
4028
4029         *((u64 *)&cb->args[0]) = ret_offset;
4030
4031         nla_nest_end(skb, chunks_attr);
4032         genlmsg_end(skb, hdr);
4033         mutex_unlock(&devlink->lock);
4034         mutex_unlock(&devlink_mutex);
4035
4036         return skb->len;
4037
4038 nla_put_failure:
4039         genlmsg_cancel(skb, hdr);
4040 out_unlock:
4041         mutex_unlock(&devlink->lock);
4042 out_dev:
4043         mutex_unlock(&devlink_mutex);
4044         return err;
4045 }
4046
4047 struct devlink_info_req {
4048         struct sk_buff *msg;
4049 };
4050
4051 int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name)
4052 {
4053         return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name);
4054 }
4055 EXPORT_SYMBOL_GPL(devlink_info_driver_name_put);
4056
4057 int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
4058 {
4059         return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn);
4060 }
4061 EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
4062
4063 static int devlink_info_version_put(struct devlink_info_req *req, int attr,
4064                                     const char *version_name,
4065                                     const char *version_value)
4066 {
4067         struct nlattr *nest;
4068         int err;
4069
4070         nest = nla_nest_start_noflag(req->msg, attr);
4071         if (!nest)
4072                 return -EMSGSIZE;
4073
4074         err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME,
4075                              version_name);
4076         if (err)
4077                 goto nla_put_failure;
4078
4079         err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE,
4080                              version_value);
4081         if (err)
4082                 goto nla_put_failure;
4083
4084         nla_nest_end(req->msg, nest);
4085
4086         return 0;
4087
4088 nla_put_failure:
4089         nla_nest_cancel(req->msg, nest);
4090         return err;
4091 }
4092
4093 int devlink_info_version_fixed_put(struct devlink_info_req *req,
4094                                    const char *version_name,
4095                                    const char *version_value)
4096 {
4097         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED,
4098                                         version_name, version_value);
4099 }
4100 EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
4101
4102 int devlink_info_version_stored_put(struct devlink_info_req *req,
4103                                     const char *version_name,
4104                                     const char *version_value)
4105 {
4106         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
4107                                         version_name, version_value);
4108 }
4109 EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
4110
4111 int devlink_info_version_running_put(struct devlink_info_req *req,
4112                                      const char *version_name,
4113                                      const char *version_value)
4114 {
4115         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
4116                                         version_name, version_value);
4117 }
4118 EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
4119
4120 static int
4121 devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
4122                      enum devlink_command cmd, u32 portid,
4123                      u32 seq, int flags, struct netlink_ext_ack *extack)
4124 {
4125         struct devlink_info_req req;
4126         void *hdr;
4127         int err;
4128
4129         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4130         if (!hdr)
4131                 return -EMSGSIZE;
4132
4133         err = -EMSGSIZE;
4134         if (devlink_nl_put_handle(msg, devlink))
4135                 goto err_cancel_msg;
4136
4137         req.msg = msg;
4138         err = devlink->ops->info_get(devlink, &req, extack);
4139         if (err)
4140                 goto err_cancel_msg;
4141
4142         genlmsg_end(msg, hdr);
4143         return 0;
4144
4145 err_cancel_msg:
4146         genlmsg_cancel(msg, hdr);
4147         return err;
4148 }
4149
4150 static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb,
4151                                         struct genl_info *info)
4152 {
4153         struct devlink *devlink = info->user_ptr[0];
4154         struct sk_buff *msg;
4155         int err;
4156
4157         if (!devlink->ops->info_get)
4158                 return -EOPNOTSUPP;
4159
4160         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4161         if (!msg)
4162                 return -ENOMEM;
4163
4164         err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4165                                    info->snd_portid, info->snd_seq, 0,
4166                                    info->extack);
4167         if (err) {
4168                 nlmsg_free(msg);
4169                 return err;
4170         }
4171
4172         return genlmsg_reply(msg, info);
4173 }
4174
4175 static int devlink_nl_cmd_info_get_dumpit(struct sk_buff *msg,
4176                                           struct netlink_callback *cb)
4177 {
4178         struct devlink *devlink;
4179         int start = cb->args[0];
4180         int idx = 0;
4181         int err = 0;
4182
4183         mutex_lock(&devlink_mutex);
4184         list_for_each_entry(devlink, &devlink_list, list) {
4185                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4186                         continue;
4187                 if (idx < start) {
4188                         idx++;
4189                         continue;
4190                 }
4191
4192                 if (!devlink->ops->info_get) {
4193                         idx++;
4194                         continue;
4195                 }
4196
4197                 mutex_lock(&devlink->lock);
4198                 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4199                                            NETLINK_CB(cb->skb).portid,
4200                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
4201                                            cb->extack);
4202                 mutex_unlock(&devlink->lock);
4203                 if (err && err != -EOPNOTSUPP)
4204                         break;
4205                 idx++;
4206         }
4207         mutex_unlock(&devlink_mutex);
4208
4209         if (err != -EMSGSIZE)
4210                 return err;
4211
4212         cb->args[0] = idx;
4213         return msg->len;
4214 }
4215
4216 struct devlink_fmsg_item {
4217         struct list_head list;
4218         int attrtype;
4219         u8 nla_type;
4220         u16 len;
4221         int value[0];
4222 };
4223
4224 struct devlink_fmsg {
4225         struct list_head item_list;
4226 };
4227
4228 static struct devlink_fmsg *devlink_fmsg_alloc(void)
4229 {
4230         struct devlink_fmsg *fmsg;
4231
4232         fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
4233         if (!fmsg)
4234                 return NULL;
4235
4236         INIT_LIST_HEAD(&fmsg->item_list);
4237
4238         return fmsg;
4239 }
4240
4241 static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
4242 {
4243         struct devlink_fmsg_item *item, *tmp;
4244
4245         list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
4246                 list_del(&item->list);
4247                 kfree(item);
4248         }
4249         kfree(fmsg);
4250 }
4251
4252 static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
4253                                     int attrtype)
4254 {
4255         struct devlink_fmsg_item *item;
4256
4257         item = kzalloc(sizeof(*item), GFP_KERNEL);
4258         if (!item)
4259                 return -ENOMEM;
4260
4261         item->attrtype = attrtype;
4262         list_add_tail(&item->list, &fmsg->item_list);
4263
4264         return 0;
4265 }
4266
4267 int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
4268 {
4269         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
4270 }
4271 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
4272
4273 static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
4274 {
4275         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
4276 }
4277
4278 int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
4279 {
4280         return devlink_fmsg_nest_end(fmsg);
4281 }
4282 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
4283
4284 #define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
4285
4286 static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
4287 {
4288         struct devlink_fmsg_item *item;
4289
4290         if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
4291                 return -EMSGSIZE;
4292
4293         item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
4294         if (!item)
4295                 return -ENOMEM;
4296
4297         item->nla_type = NLA_NUL_STRING;
4298         item->len = strlen(name) + 1;
4299         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
4300         memcpy(&item->value, name, item->len);
4301         list_add_tail(&item->list, &fmsg->item_list);
4302
4303         return 0;
4304 }
4305
4306 int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
4307 {
4308         int err;
4309
4310         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
4311         if (err)
4312                 return err;
4313
4314         err = devlink_fmsg_put_name(fmsg, name);
4315         if (err)
4316                 return err;
4317
4318         return 0;
4319 }
4320 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
4321
4322 int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
4323 {
4324         return devlink_fmsg_nest_end(fmsg);
4325 }
4326 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
4327
4328 int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
4329                                      const char *name)
4330 {
4331         int err;
4332
4333         err = devlink_fmsg_pair_nest_start(fmsg, name);
4334         if (err)
4335                 return err;
4336
4337         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
4338         if (err)
4339                 return err;
4340
4341         return 0;
4342 }
4343 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
4344
4345 int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
4346 {
4347         int err;
4348
4349         err = devlink_fmsg_nest_end(fmsg);
4350         if (err)
4351                 return err;
4352
4353         err = devlink_fmsg_nest_end(fmsg);
4354         if (err)
4355                 return err;
4356
4357         return 0;
4358 }
4359 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
4360
4361 static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
4362                                   const void *value, u16 value_len,
4363                                   u8 value_nla_type)
4364 {
4365         struct devlink_fmsg_item *item;
4366
4367         if (value_len > DEVLINK_FMSG_MAX_SIZE)
4368                 return -EMSGSIZE;
4369
4370         item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
4371         if (!item)
4372                 return -ENOMEM;
4373
4374         item->nla_type = value_nla_type;
4375         item->len = value_len;
4376         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4377         memcpy(&item->value, value, item->len);
4378         list_add_tail(&item->list, &fmsg->item_list);
4379
4380         return 0;
4381 }
4382
4383 int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
4384 {
4385         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
4386 }
4387 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
4388
4389 int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
4390 {
4391         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
4392 }
4393 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
4394
4395 int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
4396 {
4397         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
4398 }
4399 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
4400
4401 int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
4402 {
4403         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
4404 }
4405 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
4406
4407 int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
4408 {
4409         return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
4410                                       NLA_NUL_STRING);
4411 }
4412 EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
4413
4414 int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
4415                             u16 value_len)
4416 {
4417         return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
4418 }
4419 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
4420
4421 int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
4422                                bool value)
4423 {
4424         int err;
4425
4426         err = devlink_fmsg_pair_nest_start(fmsg, name);
4427         if (err)
4428                 return err;
4429
4430         err = devlink_fmsg_bool_put(fmsg, value);
4431         if (err)
4432                 return err;
4433
4434         err = devlink_fmsg_pair_nest_end(fmsg);
4435         if (err)
4436                 return err;
4437
4438         return 0;
4439 }
4440 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
4441
4442 int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
4443                              u8 value)
4444 {
4445         int err;
4446
4447         err = devlink_fmsg_pair_nest_start(fmsg, name);
4448         if (err)
4449                 return err;
4450
4451         err = devlink_fmsg_u8_put(fmsg, value);
4452         if (err)
4453                 return err;
4454
4455         err = devlink_fmsg_pair_nest_end(fmsg);
4456         if (err)
4457                 return err;
4458
4459         return 0;
4460 }
4461 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
4462
4463 int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
4464                               u32 value)
4465 {
4466         int err;
4467
4468         err = devlink_fmsg_pair_nest_start(fmsg, name);
4469         if (err)
4470                 return err;
4471
4472         err = devlink_fmsg_u32_put(fmsg, value);
4473         if (err)
4474                 return err;
4475
4476         err = devlink_fmsg_pair_nest_end(fmsg);
4477         if (err)
4478                 return err;
4479
4480         return 0;
4481 }
4482 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
4483
4484 int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
4485                               u64 value)
4486 {
4487         int err;
4488
4489         err = devlink_fmsg_pair_nest_start(fmsg, name);
4490         if (err)
4491                 return err;
4492
4493         err = devlink_fmsg_u64_put(fmsg, value);
4494         if (err)
4495                 return err;
4496
4497         err = devlink_fmsg_pair_nest_end(fmsg);
4498         if (err)
4499                 return err;
4500
4501         return 0;
4502 }
4503 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
4504
4505 int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
4506                                  const char *value)
4507 {
4508         int err;
4509
4510         err = devlink_fmsg_pair_nest_start(fmsg, name);
4511         if (err)
4512                 return err;
4513
4514         err = devlink_fmsg_string_put(fmsg, value);
4515         if (err)
4516                 return err;
4517
4518         err = devlink_fmsg_pair_nest_end(fmsg);
4519         if (err)
4520                 return err;
4521
4522         return 0;
4523 }
4524 EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
4525
4526 int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
4527                                  const void *value, u16 value_len)
4528 {
4529         int err;
4530
4531         err = devlink_fmsg_pair_nest_start(fmsg, name);
4532         if (err)
4533                 return err;
4534
4535         err = devlink_fmsg_binary_put(fmsg, value, value_len);
4536         if (err)
4537                 return err;
4538
4539         err = devlink_fmsg_pair_nest_end(fmsg);
4540         if (err)
4541                 return err;
4542
4543         return 0;
4544 }
4545 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
4546
4547 static int
4548 devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4549 {
4550         switch (msg->nla_type) {
4551         case NLA_FLAG:
4552         case NLA_U8:
4553         case NLA_U32:
4554         case NLA_U64:
4555         case NLA_NUL_STRING:
4556         case NLA_BINARY:
4557                 return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
4558                                   msg->nla_type);
4559         default:
4560                 return -EINVAL;
4561         }
4562 }
4563
4564 static int
4565 devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4566 {
4567         int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4568         u8 tmp;
4569
4570         switch (msg->nla_type) {
4571         case NLA_FLAG:
4572                 /* Always provide flag data, regardless of its value */
4573                 tmp = *(bool *) msg->value;
4574
4575                 return nla_put_u8(skb, attrtype, tmp);
4576         case NLA_U8:
4577                 return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
4578         case NLA_U32:
4579                 return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
4580         case NLA_U64:
4581                 return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
4582                                          DEVLINK_ATTR_PAD);
4583         case NLA_NUL_STRING:
4584                 return nla_put_string(skb, attrtype, (char *) &msg->value);
4585         case NLA_BINARY:
4586                 return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
4587         default:
4588                 return -EINVAL;
4589         }
4590 }
4591
4592 static int
4593 devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4594                          int *start)
4595 {
4596         struct devlink_fmsg_item *item;
4597         struct nlattr *fmsg_nlattr;
4598         int i = 0;
4599         int err;
4600
4601         fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
4602         if (!fmsg_nlattr)
4603                 return -EMSGSIZE;
4604
4605         list_for_each_entry(item, &fmsg->item_list, list) {
4606                 if (i < *start) {
4607                         i++;
4608                         continue;
4609                 }
4610
4611                 switch (item->attrtype) {
4612                 case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
4613                 case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
4614                 case DEVLINK_ATTR_FMSG_ARR_NEST_START:
4615                 case DEVLINK_ATTR_FMSG_NEST_END:
4616                         err = nla_put_flag(skb, item->attrtype);
4617                         break;
4618                 case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
4619                         err = devlink_fmsg_item_fill_type(item, skb);
4620                         if (err)
4621                                 break;
4622                         err = devlink_fmsg_item_fill_data(item, skb);
4623                         break;
4624                 case DEVLINK_ATTR_FMSG_OBJ_NAME:
4625                         err = nla_put_string(skb, item->attrtype,
4626                                              (char *) &item->value);
4627                         break;
4628                 default:
4629                         err = -EINVAL;
4630                         break;
4631                 }
4632                 if (!err)
4633                         *start = ++i;
4634                 else
4635                         break;
4636         }
4637
4638         nla_nest_end(skb, fmsg_nlattr);
4639         return err;
4640 }
4641
4642 static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
4643                             struct genl_info *info,
4644                             enum devlink_command cmd, int flags)
4645 {
4646         struct nlmsghdr *nlh;
4647         struct sk_buff *skb;
4648         bool last = false;
4649         int index = 0;
4650         void *hdr;
4651         int err;
4652
4653         while (!last) {
4654                 int tmp_index = index;
4655
4656                 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4657                 if (!skb)
4658                         return -ENOMEM;
4659
4660                 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
4661                                   &devlink_nl_family, flags | NLM_F_MULTI, cmd);
4662                 if (!hdr) {
4663                         err = -EMSGSIZE;
4664                         goto nla_put_failure;
4665                 }
4666
4667                 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
4668                 if (!err)
4669                         last = true;
4670                 else if (err != -EMSGSIZE || tmp_index == index)
4671                         goto nla_put_failure;
4672
4673                 genlmsg_end(skb, hdr);
4674                 err = genlmsg_reply(skb, info);
4675                 if (err)
4676                         return err;
4677         }
4678
4679         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4680         if (!skb)
4681                 return -ENOMEM;
4682         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
4683                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
4684         if (!nlh) {
4685                 err = -EMSGSIZE;
4686                 goto nla_put_failure;
4687         }
4688
4689         return genlmsg_reply(skb, info);
4690
4691 nla_put_failure:
4692         nlmsg_free(skb);
4693         return err;
4694 }
4695
4696 static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4697                                struct netlink_callback *cb,
4698                                enum devlink_command cmd)
4699 {
4700         int index = cb->args[0];
4701         int tmp_index = index;
4702         void *hdr;
4703         int err;
4704
4705         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
4706                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
4707         if (!hdr) {
4708                 err = -EMSGSIZE;
4709                 goto nla_put_failure;
4710         }
4711
4712         err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
4713         if ((err && err != -EMSGSIZE) || tmp_index == index)
4714                 goto nla_put_failure;
4715
4716         cb->args[0] = index;
4717         genlmsg_end(skb, hdr);
4718         return skb->len;
4719
4720 nla_put_failure:
4721         genlmsg_cancel(skb, hdr);
4722         return err;
4723 }
4724
4725 struct devlink_health_reporter {
4726         struct list_head list;
4727         void *priv;
4728         const struct devlink_health_reporter_ops *ops;
4729         struct devlink *devlink;
4730         struct devlink_fmsg *dump_fmsg;
4731         struct mutex dump_lock; /* lock parallel read/write from dump buffers */
4732         u64 graceful_period;
4733         bool auto_recover;
4734         u8 health_state;
4735         u64 dump_ts;
4736         u64 error_count;
4737         u64 recovery_count;
4738         u64 last_recovery_ts;
4739         refcount_t refcount;
4740 };
4741
4742 void *
4743 devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
4744 {
4745         return reporter->priv;
4746 }
4747 EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
4748
4749 static struct devlink_health_reporter *
4750 devlink_health_reporter_find_by_name(struct devlink *devlink,
4751                                      const char *reporter_name)
4752 {
4753         struct devlink_health_reporter *reporter;
4754
4755         lockdep_assert_held(&devlink->reporters_lock);
4756         list_for_each_entry(reporter, &devlink->reporter_list, list)
4757                 if (!strcmp(reporter->ops->name, reporter_name))
4758                         return reporter;
4759         return NULL;
4760 }
4761
4762 /**
4763  *      devlink_health_reporter_create - create devlink health reporter
4764  *
4765  *      @devlink: devlink
4766  *      @ops: ops
4767  *      @graceful_period: to avoid recovery loops, in msecs
4768  *      @auto_recover: auto recover when error occurs
4769  *      @priv: priv
4770  */
4771 struct devlink_health_reporter *
4772 devlink_health_reporter_create(struct devlink *devlink,
4773                                const struct devlink_health_reporter_ops *ops,
4774                                u64 graceful_period, bool auto_recover,
4775                                void *priv)
4776 {
4777         struct devlink_health_reporter *reporter;
4778
4779         mutex_lock(&devlink->reporters_lock);
4780         if (devlink_health_reporter_find_by_name(devlink, ops->name)) {
4781                 reporter = ERR_PTR(-EEXIST);
4782                 goto unlock;
4783         }
4784
4785         if (WARN_ON(auto_recover && !ops->recover) ||
4786             WARN_ON(graceful_period && !ops->recover)) {
4787                 reporter = ERR_PTR(-EINVAL);
4788                 goto unlock;
4789         }
4790
4791         reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
4792         if (!reporter) {
4793                 reporter = ERR_PTR(-ENOMEM);
4794                 goto unlock;
4795         }
4796
4797         reporter->priv = priv;
4798         reporter->ops = ops;
4799         reporter->devlink = devlink;
4800         reporter->graceful_period = graceful_period;
4801         reporter->auto_recover = auto_recover;
4802         mutex_init(&reporter->dump_lock);
4803         refcount_set(&reporter->refcount, 1);
4804         list_add_tail(&reporter->list, &devlink->reporter_list);
4805 unlock:
4806         mutex_unlock(&devlink->reporters_lock);
4807         return reporter;
4808 }
4809 EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
4810
4811 /**
4812  *      devlink_health_reporter_destroy - destroy devlink health reporter
4813  *
4814  *      @reporter: devlink health reporter to destroy
4815  */
4816 void
4817 devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
4818 {
4819         mutex_lock(&reporter->devlink->reporters_lock);
4820         list_del(&reporter->list);
4821         mutex_unlock(&reporter->devlink->reporters_lock);
4822         while (refcount_read(&reporter->refcount) > 1)
4823                 msleep(100);
4824         mutex_destroy(&reporter->dump_lock);
4825         if (reporter->dump_fmsg)
4826                 devlink_fmsg_free(reporter->dump_fmsg);
4827         kfree(reporter);
4828 }
4829 EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
4830
4831 void
4832 devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
4833                                      enum devlink_health_reporter_state state)
4834 {
4835         if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
4836                     state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
4837                 return;
4838
4839         if (reporter->health_state == state)
4840                 return;
4841
4842         reporter->health_state = state;
4843         trace_devlink_health_reporter_state_update(reporter->devlink,
4844                                                    reporter->ops->name, state);
4845 }
4846 EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
4847
4848 static int
4849 devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
4850                                 void *priv_ctx, struct netlink_ext_ack *extack)
4851 {
4852         int err;
4853
4854         if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
4855                 return 0;
4856
4857         if (!reporter->ops->recover)
4858                 return -EOPNOTSUPP;
4859
4860         err = reporter->ops->recover(reporter, priv_ctx, extack);
4861         if (err)
4862                 return err;
4863
4864         reporter->recovery_count++;
4865         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
4866         reporter->last_recovery_ts = jiffies;
4867
4868         return 0;
4869 }
4870
4871 static void
4872 devlink_health_dump_clear(struct devlink_health_reporter *reporter)
4873 {
4874         if (!reporter->dump_fmsg)
4875                 return;
4876         devlink_fmsg_free(reporter->dump_fmsg);
4877         reporter->dump_fmsg = NULL;
4878 }
4879
4880 static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
4881                                   void *priv_ctx,
4882                                   struct netlink_ext_ack *extack)
4883 {
4884         int err;
4885
4886         if (!reporter->ops->dump)
4887                 return 0;
4888
4889         if (reporter->dump_fmsg)
4890                 return 0;
4891
4892         reporter->dump_fmsg = devlink_fmsg_alloc();
4893         if (!reporter->dump_fmsg) {
4894                 err = -ENOMEM;
4895                 return err;
4896         }
4897
4898         err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
4899         if (err)
4900                 goto dump_err;
4901
4902         err = reporter->ops->dump(reporter, reporter->dump_fmsg,
4903                                   priv_ctx, extack);
4904         if (err)
4905                 goto dump_err;
4906
4907         err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
4908         if (err)
4909                 goto dump_err;
4910
4911         reporter->dump_ts = jiffies;
4912
4913         return 0;
4914
4915 dump_err:
4916         devlink_health_dump_clear(reporter);
4917         return err;
4918 }
4919
4920 int devlink_health_report(struct devlink_health_reporter *reporter,
4921                           const char *msg, void *priv_ctx)
4922 {
4923         enum devlink_health_reporter_state prev_health_state;
4924         struct devlink *devlink = reporter->devlink;
4925
4926         /* write a log message of the current error */
4927         WARN_ON(!msg);
4928         trace_devlink_health_report(devlink, reporter->ops->name, msg);
4929         reporter->error_count++;
4930         prev_health_state = reporter->health_state;
4931         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
4932
4933         /* abort if the previous error wasn't recovered */
4934         if (reporter->auto_recover &&
4935             (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
4936              jiffies - reporter->last_recovery_ts <
4937              msecs_to_jiffies(reporter->graceful_period))) {
4938                 trace_devlink_health_recover_aborted(devlink,
4939                                                      reporter->ops->name,
4940                                                      reporter->health_state,
4941                                                      jiffies -
4942                                                      reporter->last_recovery_ts);
4943                 return -ECANCELED;
4944         }
4945
4946         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
4947
4948         mutex_lock(&reporter->dump_lock);
4949         /* store current dump of current error, for later analysis */
4950         devlink_health_do_dump(reporter, priv_ctx, NULL);
4951         mutex_unlock(&reporter->dump_lock);
4952
4953         if (reporter->auto_recover)
4954                 return devlink_health_reporter_recover(reporter,
4955                                                        priv_ctx, NULL);
4956
4957         return 0;
4958 }
4959 EXPORT_SYMBOL_GPL(devlink_health_report);
4960
4961 static struct devlink_health_reporter *
4962 devlink_health_reporter_get_from_attrs(struct devlink *devlink,
4963                                        struct nlattr **attrs)
4964 {
4965         struct devlink_health_reporter *reporter;
4966         char *reporter_name;
4967
4968         if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
4969                 return NULL;
4970
4971         reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
4972         mutex_lock(&devlink->reporters_lock);
4973         reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
4974         if (reporter)
4975                 refcount_inc(&reporter->refcount);
4976         mutex_unlock(&devlink->reporters_lock);
4977         return reporter;
4978 }
4979
4980 static struct devlink_health_reporter *
4981 devlink_health_reporter_get_from_info(struct devlink *devlink,
4982                                       struct genl_info *info)
4983 {
4984         return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
4985 }
4986
4987 static struct devlink_health_reporter *
4988 devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
4989 {
4990         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
4991         struct devlink_health_reporter *reporter;
4992         struct nlattr **attrs = info->attrs;
4993         struct devlink *devlink;
4994
4995         mutex_lock(&devlink_mutex);
4996         devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
4997         if (IS_ERR(devlink))
4998                 goto unlock;
4999
5000         reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
5001         mutex_unlock(&devlink_mutex);
5002         return reporter;
5003 unlock:
5004         mutex_unlock(&devlink_mutex);
5005         return NULL;
5006 }
5007
5008 static void
5009 devlink_health_reporter_put(struct devlink_health_reporter *reporter)
5010 {
5011         refcount_dec(&reporter->refcount);
5012 }
5013
5014 static int
5015 devlink_nl_health_reporter_fill(struct sk_buff *msg,
5016                                 struct devlink *devlink,
5017                                 struct devlink_health_reporter *reporter,
5018                                 enum devlink_command cmd, u32 portid,
5019                                 u32 seq, int flags)
5020 {
5021         struct nlattr *reporter_attr;
5022         void *hdr;
5023
5024         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5025         if (!hdr)
5026                 return -EMSGSIZE;
5027
5028         if (devlink_nl_put_handle(msg, devlink))
5029                 goto genlmsg_cancel;
5030
5031         reporter_attr = nla_nest_start_noflag(msg,
5032                                               DEVLINK_ATTR_HEALTH_REPORTER);
5033         if (!reporter_attr)
5034                 goto genlmsg_cancel;
5035         if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
5036                            reporter->ops->name))
5037                 goto reporter_nest_cancel;
5038         if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
5039                        reporter->health_state))
5040                 goto reporter_nest_cancel;
5041         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
5042                               reporter->error_count, DEVLINK_ATTR_PAD))
5043                 goto reporter_nest_cancel;
5044         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
5045                               reporter->recovery_count, DEVLINK_ATTR_PAD))
5046                 goto reporter_nest_cancel;
5047         if (reporter->ops->recover &&
5048             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
5049                               reporter->graceful_period,
5050                               DEVLINK_ATTR_PAD))
5051                 goto reporter_nest_cancel;
5052         if (reporter->ops->recover &&
5053             nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
5054                        reporter->auto_recover))
5055                 goto reporter_nest_cancel;
5056         if (reporter->dump_fmsg &&
5057             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
5058                               jiffies_to_msecs(reporter->dump_ts),
5059                               DEVLINK_ATTR_PAD))
5060                 goto reporter_nest_cancel;
5061
5062         nla_nest_end(msg, reporter_attr);
5063         genlmsg_end(msg, hdr);
5064         return 0;
5065
5066 reporter_nest_cancel:
5067         nla_nest_end(msg, reporter_attr);
5068 genlmsg_cancel:
5069         genlmsg_cancel(msg, hdr);
5070         return -EMSGSIZE;
5071 }
5072
5073 static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
5074                                                    struct genl_info *info)
5075 {
5076         struct devlink *devlink = info->user_ptr[0];
5077         struct devlink_health_reporter *reporter;
5078         struct sk_buff *msg;
5079         int err;
5080
5081         reporter = devlink_health_reporter_get_from_info(devlink, info);
5082         if (!reporter)
5083                 return -EINVAL;
5084
5085         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5086         if (!msg) {
5087                 err = -ENOMEM;
5088                 goto out;
5089         }
5090
5091         err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
5092                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
5093                                               info->snd_portid, info->snd_seq,
5094                                               0);
5095         if (err) {
5096                 nlmsg_free(msg);
5097                 goto out;
5098         }
5099
5100         err = genlmsg_reply(msg, info);
5101 out:
5102         devlink_health_reporter_put(reporter);
5103         return err;
5104 }
5105
5106 static int
5107 devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
5108                                           struct netlink_callback *cb)
5109 {
5110         struct devlink_health_reporter *reporter;
5111         struct devlink *devlink;
5112         int start = cb->args[0];
5113         int idx = 0;
5114         int err;
5115
5116         mutex_lock(&devlink_mutex);
5117         list_for_each_entry(devlink, &devlink_list, list) {
5118                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5119                         continue;
5120                 mutex_lock(&devlink->reporters_lock);
5121                 list_for_each_entry(reporter, &devlink->reporter_list,
5122                                     list) {
5123                         if (idx < start) {
5124                                 idx++;
5125                                 continue;
5126                         }
5127                         err = devlink_nl_health_reporter_fill(msg, devlink,
5128                                                               reporter,
5129                                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
5130                                                               NETLINK_CB(cb->skb).portid,
5131                                                               cb->nlh->nlmsg_seq,
5132                                                               NLM_F_MULTI);
5133                         if (err) {
5134                                 mutex_unlock(&devlink->reporters_lock);
5135                                 goto out;
5136                         }
5137                         idx++;
5138                 }
5139                 mutex_unlock(&devlink->reporters_lock);
5140         }
5141 out:
5142         mutex_unlock(&devlink_mutex);
5143
5144         cb->args[0] = idx;
5145         return msg->len;
5146 }
5147
5148 static int
5149 devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
5150                                         struct genl_info *info)
5151 {
5152         struct devlink *devlink = info->user_ptr[0];
5153         struct devlink_health_reporter *reporter;
5154         int err;
5155
5156         reporter = devlink_health_reporter_get_from_info(devlink, info);
5157         if (!reporter)
5158                 return -EINVAL;
5159
5160         if (!reporter->ops->recover &&
5161             (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
5162              info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])) {
5163                 err = -EOPNOTSUPP;
5164                 goto out;
5165         }
5166
5167         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
5168                 reporter->graceful_period =
5169                         nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
5170
5171         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
5172                 reporter->auto_recover =
5173                         nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
5174
5175         devlink_health_reporter_put(reporter);
5176         return 0;
5177 out:
5178         devlink_health_reporter_put(reporter);
5179         return err;
5180 }
5181
5182 static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
5183                                                        struct genl_info *info)
5184 {
5185         struct devlink *devlink = info->user_ptr[0];
5186         struct devlink_health_reporter *reporter;
5187         int err;
5188
5189         reporter = devlink_health_reporter_get_from_info(devlink, info);
5190         if (!reporter)
5191                 return -EINVAL;
5192
5193         err = devlink_health_reporter_recover(reporter, NULL, info->extack);
5194
5195         devlink_health_reporter_put(reporter);
5196         return err;
5197 }
5198
5199 static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
5200                                                         struct genl_info *info)
5201 {
5202         struct devlink *devlink = info->user_ptr[0];
5203         struct devlink_health_reporter *reporter;
5204         struct devlink_fmsg *fmsg;
5205         int err;
5206
5207         reporter = devlink_health_reporter_get_from_info(devlink, info);
5208         if (!reporter)
5209                 return -EINVAL;
5210
5211         if (!reporter->ops->diagnose) {
5212                 devlink_health_reporter_put(reporter);
5213                 return -EOPNOTSUPP;
5214         }
5215
5216         fmsg = devlink_fmsg_alloc();
5217         if (!fmsg) {
5218                 devlink_health_reporter_put(reporter);
5219                 return -ENOMEM;
5220         }
5221
5222         err = devlink_fmsg_obj_nest_start(fmsg);
5223         if (err)
5224                 goto out;
5225
5226         err = reporter->ops->diagnose(reporter, fmsg, info->extack);
5227         if (err)
5228                 goto out;
5229
5230         err = devlink_fmsg_obj_nest_end(fmsg);
5231         if (err)
5232                 goto out;
5233
5234         err = devlink_fmsg_snd(fmsg, info,
5235                                DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
5236
5237 out:
5238         devlink_fmsg_free(fmsg);
5239         devlink_health_reporter_put(reporter);
5240         return err;
5241 }
5242
5243 static int
5244 devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
5245                                                struct netlink_callback *cb)
5246 {
5247         struct devlink_health_reporter *reporter;
5248         u64 start = cb->args[0];
5249         int err;
5250
5251         reporter = devlink_health_reporter_get_from_cb(cb);
5252         if (!reporter)
5253                 return -EINVAL;
5254
5255         if (!reporter->ops->dump) {
5256                 err = -EOPNOTSUPP;
5257                 goto out;
5258         }
5259         mutex_lock(&reporter->dump_lock);
5260         if (!start) {
5261                 err = devlink_health_do_dump(reporter, NULL, cb->extack);
5262                 if (err)
5263                         goto unlock;
5264                 cb->args[1] = reporter->dump_ts;
5265         }
5266         if (!reporter->dump_fmsg || cb->args[1] != reporter->dump_ts) {
5267                 NL_SET_ERR_MSG_MOD(cb->extack, "Dump trampled, please retry");
5268                 err = -EAGAIN;
5269                 goto unlock;
5270         }
5271
5272         err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
5273                                   DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
5274 unlock:
5275         mutex_unlock(&reporter->dump_lock);
5276 out:
5277         devlink_health_reporter_put(reporter);
5278         return err;
5279 }
5280
5281 static int
5282 devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
5283                                                struct genl_info *info)
5284 {
5285         struct devlink *devlink = info->user_ptr[0];
5286         struct devlink_health_reporter *reporter;
5287
5288         reporter = devlink_health_reporter_get_from_info(devlink, info);
5289         if (!reporter)
5290                 return -EINVAL;
5291
5292         if (!reporter->ops->dump) {
5293                 devlink_health_reporter_put(reporter);
5294                 return -EOPNOTSUPP;
5295         }
5296
5297         mutex_lock(&reporter->dump_lock);
5298         devlink_health_dump_clear(reporter);
5299         mutex_unlock(&reporter->dump_lock);
5300         devlink_health_reporter_put(reporter);
5301         return 0;
5302 }
5303
5304 struct devlink_stats {
5305         u64 rx_bytes;
5306         u64 rx_packets;
5307         struct u64_stats_sync syncp;
5308 };
5309
5310 /**
5311  * struct devlink_trap_group_item - Packet trap group attributes.
5312  * @group: Immutable packet trap group attributes.
5313  * @refcount: Number of trap items using the group.
5314  * @list: trap_group_list member.
5315  * @stats: Trap group statistics.
5316  *
5317  * Describes packet trap group attributes. Created by devlink during trap
5318  * registration.
5319  */
5320 struct devlink_trap_group_item {
5321         const struct devlink_trap_group *group;
5322         refcount_t refcount;
5323         struct list_head list;
5324         struct devlink_stats __percpu *stats;
5325 };
5326
5327 /**
5328  * struct devlink_trap_item - Packet trap attributes.
5329  * @trap: Immutable packet trap attributes.
5330  * @group_item: Associated group item.
5331  * @list: trap_list member.
5332  * @action: Trap action.
5333  * @stats: Trap statistics.
5334  * @priv: Driver private information.
5335  *
5336  * Describes both mutable and immutable packet trap attributes. Created by
5337  * devlink during trap registration and used for all trap related operations.
5338  */
5339 struct devlink_trap_item {
5340         const struct devlink_trap *trap;
5341         struct devlink_trap_group_item *group_item;
5342         struct list_head list;
5343         enum devlink_trap_action action;
5344         struct devlink_stats __percpu *stats;
5345         void *priv;
5346 };
5347
5348 static struct devlink_trap_item *
5349 devlink_trap_item_lookup(struct devlink *devlink, const char *name)
5350 {
5351         struct devlink_trap_item *trap_item;
5352
5353         list_for_each_entry(trap_item, &devlink->trap_list, list) {
5354                 if (!strcmp(trap_item->trap->name, name))
5355                         return trap_item;
5356         }
5357
5358         return NULL;
5359 }
5360
5361 static struct devlink_trap_item *
5362 devlink_trap_item_get_from_info(struct devlink *devlink,
5363                                 struct genl_info *info)
5364 {
5365         struct nlattr *attr;
5366
5367         if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
5368                 return NULL;
5369         attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
5370
5371         return devlink_trap_item_lookup(devlink, nla_data(attr));
5372 }
5373
5374 static int
5375 devlink_trap_action_get_from_info(struct genl_info *info,
5376                                   enum devlink_trap_action *p_trap_action)
5377 {
5378         u8 val;
5379
5380         val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
5381         switch (val) {
5382         case DEVLINK_TRAP_ACTION_DROP: /* fall-through */
5383         case DEVLINK_TRAP_ACTION_TRAP:
5384                 *p_trap_action = val;
5385                 break;
5386         default:
5387                 return -EINVAL;
5388         }
5389
5390         return 0;
5391 }
5392
5393 static int devlink_trap_metadata_put(struct sk_buff *msg,
5394                                      const struct devlink_trap *trap)
5395 {
5396         struct nlattr *attr;
5397
5398         attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
5399         if (!attr)
5400                 return -EMSGSIZE;
5401
5402         if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
5403             nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
5404                 goto nla_put_failure;
5405
5406         nla_nest_end(msg, attr);
5407
5408         return 0;
5409
5410 nla_put_failure:
5411         nla_nest_cancel(msg, attr);
5412         return -EMSGSIZE;
5413 }
5414
5415 static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
5416                                     struct devlink_stats *stats)
5417 {
5418         int i;
5419
5420         memset(stats, 0, sizeof(*stats));
5421         for_each_possible_cpu(i) {
5422                 struct devlink_stats *cpu_stats;
5423                 u64 rx_packets, rx_bytes;
5424                 unsigned int start;
5425
5426                 cpu_stats = per_cpu_ptr(trap_stats, i);
5427                 do {
5428                         start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
5429                         rx_packets = cpu_stats->rx_packets;
5430                         rx_bytes = cpu_stats->rx_bytes;
5431                 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
5432
5433                 stats->rx_packets += rx_packets;
5434                 stats->rx_bytes += rx_bytes;
5435         }
5436 }
5437
5438 static int devlink_trap_stats_put(struct sk_buff *msg,
5439                                   struct devlink_stats __percpu *trap_stats)
5440 {
5441         struct devlink_stats stats;
5442         struct nlattr *attr;
5443
5444         devlink_trap_stats_read(trap_stats, &stats);
5445
5446         attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
5447         if (!attr)
5448                 return -EMSGSIZE;
5449
5450         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
5451                               stats.rx_packets, DEVLINK_ATTR_PAD))
5452                 goto nla_put_failure;
5453
5454         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
5455                               stats.rx_bytes, DEVLINK_ATTR_PAD))
5456                 goto nla_put_failure;
5457
5458         nla_nest_end(msg, attr);
5459
5460         return 0;
5461
5462 nla_put_failure:
5463         nla_nest_cancel(msg, attr);
5464         return -EMSGSIZE;
5465 }
5466
5467 static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
5468                                 const struct devlink_trap_item *trap_item,
5469                                 enum devlink_command cmd, u32 portid, u32 seq,
5470                                 int flags)
5471 {
5472         struct devlink_trap_group_item *group_item = trap_item->group_item;
5473         void *hdr;
5474         int err;
5475
5476         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5477         if (!hdr)
5478                 return -EMSGSIZE;
5479
5480         if (devlink_nl_put_handle(msg, devlink))
5481                 goto nla_put_failure;
5482
5483         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5484                            group_item->group->name))
5485                 goto nla_put_failure;
5486
5487         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
5488                 goto nla_put_failure;
5489
5490         if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
5491                 goto nla_put_failure;
5492
5493         if (trap_item->trap->generic &&
5494             nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5495                 goto nla_put_failure;
5496
5497         if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
5498                 goto nla_put_failure;
5499
5500         err = devlink_trap_metadata_put(msg, trap_item->trap);
5501         if (err)
5502                 goto nla_put_failure;
5503
5504         err = devlink_trap_stats_put(msg, trap_item->stats);
5505         if (err)
5506                 goto nla_put_failure;
5507
5508         genlmsg_end(msg, hdr);
5509
5510         return 0;
5511
5512 nla_put_failure:
5513         genlmsg_cancel(msg, hdr);
5514         return -EMSGSIZE;
5515 }
5516
5517 static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb,
5518                                         struct genl_info *info)
5519 {
5520         struct netlink_ext_ack *extack = info->extack;
5521         struct devlink *devlink = info->user_ptr[0];
5522         struct devlink_trap_item *trap_item;
5523         struct sk_buff *msg;
5524         int err;
5525
5526         if (list_empty(&devlink->trap_list))
5527                 return -EOPNOTSUPP;
5528
5529         trap_item = devlink_trap_item_get_from_info(devlink, info);
5530         if (!trap_item) {
5531                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
5532                 return -ENOENT;
5533         }
5534
5535         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5536         if (!msg)
5537                 return -ENOMEM;
5538
5539         err = devlink_nl_trap_fill(msg, devlink, trap_item,
5540                                    DEVLINK_CMD_TRAP_NEW, info->snd_portid,
5541                                    info->snd_seq, 0);
5542         if (err)
5543                 goto err_trap_fill;
5544
5545         return genlmsg_reply(msg, info);
5546
5547 err_trap_fill:
5548         nlmsg_free(msg);
5549         return err;
5550 }
5551
5552 static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
5553                                           struct netlink_callback *cb)
5554 {
5555         struct devlink_trap_item *trap_item;
5556         struct devlink *devlink;
5557         int start = cb->args[0];
5558         int idx = 0;
5559         int err;
5560
5561         mutex_lock(&devlink_mutex);
5562         list_for_each_entry(devlink, &devlink_list, list) {
5563                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5564                         continue;
5565                 mutex_lock(&devlink->lock);
5566                 list_for_each_entry(trap_item, &devlink->trap_list, list) {
5567                         if (idx < start) {
5568                                 idx++;
5569                                 continue;
5570                         }
5571                         err = devlink_nl_trap_fill(msg, devlink, trap_item,
5572                                                    DEVLINK_CMD_TRAP_NEW,
5573                                                    NETLINK_CB(cb->skb).portid,
5574                                                    cb->nlh->nlmsg_seq,
5575                                                    NLM_F_MULTI);
5576                         if (err) {
5577                                 mutex_unlock(&devlink->lock);
5578                                 goto out;
5579                         }
5580                         idx++;
5581                 }
5582                 mutex_unlock(&devlink->lock);
5583         }
5584 out:
5585         mutex_unlock(&devlink_mutex);
5586
5587         cb->args[0] = idx;
5588         return msg->len;
5589 }
5590
5591 static int __devlink_trap_action_set(struct devlink *devlink,
5592                                      struct devlink_trap_item *trap_item,
5593                                      enum devlink_trap_action trap_action,
5594                                      struct netlink_ext_ack *extack)
5595 {
5596         int err;
5597
5598         if (trap_item->action != trap_action &&
5599             trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
5600                 NL_SET_ERR_MSG_MOD(extack, "Cannot change action of non-drop traps. Skipping");
5601                 return 0;
5602         }
5603
5604         err = devlink->ops->trap_action_set(devlink, trap_item->trap,
5605                                             trap_action);
5606         if (err)
5607                 return err;
5608
5609         trap_item->action = trap_action;
5610
5611         return 0;
5612 }
5613
5614 static int devlink_trap_action_set(struct devlink *devlink,
5615                                    struct devlink_trap_item *trap_item,
5616                                    struct genl_info *info)
5617 {
5618         enum devlink_trap_action trap_action;
5619         int err;
5620
5621         if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
5622                 return 0;
5623
5624         err = devlink_trap_action_get_from_info(info, &trap_action);
5625         if (err) {
5626                 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
5627                 return -EINVAL;
5628         }
5629
5630         return __devlink_trap_action_set(devlink, trap_item, trap_action,
5631                                          info->extack);
5632 }
5633
5634 static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb,
5635                                         struct genl_info *info)
5636 {
5637         struct netlink_ext_ack *extack = info->extack;
5638         struct devlink *devlink = info->user_ptr[0];
5639         struct devlink_trap_item *trap_item;
5640         int err;
5641
5642         if (list_empty(&devlink->trap_list))
5643                 return -EOPNOTSUPP;
5644
5645         trap_item = devlink_trap_item_get_from_info(devlink, info);
5646         if (!trap_item) {
5647                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
5648                 return -ENOENT;
5649         }
5650
5651         err = devlink_trap_action_set(devlink, trap_item, info);
5652         if (err)
5653                 return err;
5654
5655         return 0;
5656 }
5657
5658 static struct devlink_trap_group_item *
5659 devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
5660 {
5661         struct devlink_trap_group_item *group_item;
5662
5663         list_for_each_entry(group_item, &devlink->trap_group_list, list) {
5664                 if (!strcmp(group_item->group->name, name))
5665                         return group_item;
5666         }
5667
5668         return NULL;
5669 }
5670
5671 static struct devlink_trap_group_item *
5672 devlink_trap_group_item_get_from_info(struct devlink *devlink,
5673                                       struct genl_info *info)
5674 {
5675         char *name;
5676
5677         if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
5678                 return NULL;
5679         name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
5680
5681         return devlink_trap_group_item_lookup(devlink, name);
5682 }
5683
5684 static int
5685 devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
5686                            const struct devlink_trap_group_item *group_item,
5687                            enum devlink_command cmd, u32 portid, u32 seq,
5688                            int flags)
5689 {
5690         void *hdr;
5691         int err;
5692
5693         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5694         if (!hdr)
5695                 return -EMSGSIZE;
5696
5697         if (devlink_nl_put_handle(msg, devlink))
5698                 goto nla_put_failure;
5699
5700         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5701                            group_item->group->name))
5702                 goto nla_put_failure;
5703
5704         if (group_item->group->generic &&
5705             nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5706                 goto nla_put_failure;
5707
5708         err = devlink_trap_stats_put(msg, group_item->stats);
5709         if (err)
5710                 goto nla_put_failure;
5711
5712         genlmsg_end(msg, hdr);
5713
5714         return 0;
5715
5716 nla_put_failure:
5717         genlmsg_cancel(msg, hdr);
5718         return -EMSGSIZE;
5719 }
5720
5721 static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb,
5722                                               struct genl_info *info)
5723 {
5724         struct netlink_ext_ack *extack = info->extack;
5725         struct devlink *devlink = info->user_ptr[0];
5726         struct devlink_trap_group_item *group_item;
5727         struct sk_buff *msg;
5728         int err;
5729
5730         if (list_empty(&devlink->trap_group_list))
5731                 return -EOPNOTSUPP;
5732
5733         group_item = devlink_trap_group_item_get_from_info(devlink, info);
5734         if (!group_item) {
5735                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
5736                 return -ENOENT;
5737         }
5738
5739         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5740         if (!msg)
5741                 return -ENOMEM;
5742
5743         err = devlink_nl_trap_group_fill(msg, devlink, group_item,
5744                                          DEVLINK_CMD_TRAP_GROUP_NEW,
5745                                          info->snd_portid, info->snd_seq, 0);
5746         if (err)
5747                 goto err_trap_group_fill;
5748
5749         return genlmsg_reply(msg, info);
5750
5751 err_trap_group_fill:
5752         nlmsg_free(msg);
5753         return err;
5754 }
5755
5756 static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
5757                                                 struct netlink_callback *cb)
5758 {
5759         enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW;
5760         struct devlink_trap_group_item *group_item;
5761         u32 portid = NETLINK_CB(cb->skb).portid;
5762         struct devlink *devlink;
5763         int start = cb->args[0];
5764         int idx = 0;
5765         int err;
5766
5767         mutex_lock(&devlink_mutex);
5768         list_for_each_entry(devlink, &devlink_list, list) {
5769                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5770                         continue;
5771                 mutex_lock(&devlink->lock);
5772                 list_for_each_entry(group_item, &devlink->trap_group_list,
5773                                     list) {
5774                         if (idx < start) {
5775                                 idx++;
5776                                 continue;
5777                         }
5778                         err = devlink_nl_trap_group_fill(msg, devlink,
5779                                                          group_item, cmd,
5780                                                          portid,
5781                                                          cb->nlh->nlmsg_seq,
5782                                                          NLM_F_MULTI);
5783                         if (err) {
5784                                 mutex_unlock(&devlink->lock);
5785                                 goto out;
5786                         }
5787                         idx++;
5788                 }
5789                 mutex_unlock(&devlink->lock);
5790         }
5791 out:
5792         mutex_unlock(&devlink_mutex);
5793
5794         cb->args[0] = idx;
5795         return msg->len;
5796 }
5797
5798 static int
5799 __devlink_trap_group_action_set(struct devlink *devlink,
5800                                 struct devlink_trap_group_item *group_item,
5801                                 enum devlink_trap_action trap_action,
5802                                 struct netlink_ext_ack *extack)
5803 {
5804         const char *group_name = group_item->group->name;
5805         struct devlink_trap_item *trap_item;
5806         int err;
5807
5808         list_for_each_entry(trap_item, &devlink->trap_list, list) {
5809                 if (strcmp(trap_item->trap->group.name, group_name))
5810                         continue;
5811                 err = __devlink_trap_action_set(devlink, trap_item,
5812                                                 trap_action, extack);
5813                 if (err)
5814                         return err;
5815         }
5816
5817         return 0;
5818 }
5819
5820 static int
5821 devlink_trap_group_action_set(struct devlink *devlink,
5822                               struct devlink_trap_group_item *group_item,
5823                               struct genl_info *info)
5824 {
5825         enum devlink_trap_action trap_action;
5826         int err;
5827
5828         if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
5829                 return 0;
5830
5831         err = devlink_trap_action_get_from_info(info, &trap_action);
5832         if (err) {
5833                 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
5834                 return -EINVAL;
5835         }
5836
5837         err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
5838                                               info->extack);
5839         if (err)
5840                 return err;
5841
5842         return 0;
5843 }
5844
5845 static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
5846                                               struct genl_info *info)
5847 {
5848         struct netlink_ext_ack *extack = info->extack;
5849         struct devlink *devlink = info->user_ptr[0];
5850         struct devlink_trap_group_item *group_item;
5851         int err;
5852
5853         if (list_empty(&devlink->trap_group_list))
5854                 return -EOPNOTSUPP;
5855
5856         group_item = devlink_trap_group_item_get_from_info(devlink, info);
5857         if (!group_item) {
5858                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
5859                 return -ENOENT;
5860         }
5861
5862         err = devlink_trap_group_action_set(devlink, group_item, info);
5863         if (err)
5864                 return err;
5865
5866         return 0;
5867 }
5868
5869 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
5870         [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
5871         [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
5872         [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
5873         [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
5874         [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
5875         [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
5876         [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
5877         [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
5878         [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
5879         [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
5880         [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
5881         [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
5882         [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
5883         [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
5884         [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
5885         [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
5886         [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
5887         [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
5888         [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
5889         [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
5890         [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
5891         [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
5892         [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
5893         [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
5894         [DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },
5895         [DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },
5896         [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
5897         [DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
5898         [DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
5899         [DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING },
5900         [DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 },
5901         [DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING },
5902         [DEVLINK_ATTR_NETNS_PID] = { .type = NLA_U32 },
5903         [DEVLINK_ATTR_NETNS_FD] = { .type = NLA_U32 },
5904         [DEVLINK_ATTR_NETNS_ID] = { .type = NLA_U32 },
5905 };
5906
5907 static const struct genl_ops devlink_nl_ops[] = {
5908         {
5909                 .cmd = DEVLINK_CMD_GET,
5910                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5911                 .doit = devlink_nl_cmd_get_doit,
5912                 .dumpit = devlink_nl_cmd_get_dumpit,
5913                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5914                 /* can be retrieved by unprivileged users */
5915         },
5916         {
5917                 .cmd = DEVLINK_CMD_PORT_GET,
5918                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5919                 .doit = devlink_nl_cmd_port_get_doit,
5920                 .dumpit = devlink_nl_cmd_port_get_dumpit,
5921                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5922                 /* can be retrieved by unprivileged users */
5923         },
5924         {
5925                 .cmd = DEVLINK_CMD_PORT_SET,
5926                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5927                 .doit = devlink_nl_cmd_port_set_doit,
5928                 .flags = GENL_ADMIN_PERM,
5929                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5930         },
5931         {
5932                 .cmd = DEVLINK_CMD_PORT_SPLIT,
5933                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5934                 .doit = devlink_nl_cmd_port_split_doit,
5935                 .flags = GENL_ADMIN_PERM,
5936                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5937                                   DEVLINK_NL_FLAG_NO_LOCK,
5938         },
5939         {
5940                 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
5941                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5942                 .doit = devlink_nl_cmd_port_unsplit_doit,
5943                 .flags = GENL_ADMIN_PERM,
5944                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5945                                   DEVLINK_NL_FLAG_NO_LOCK,
5946         },
5947         {
5948                 .cmd = DEVLINK_CMD_SB_GET,
5949                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5950                 .doit = devlink_nl_cmd_sb_get_doit,
5951                 .dumpit = devlink_nl_cmd_sb_get_dumpit,
5952                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5953                                   DEVLINK_NL_FLAG_NEED_SB,
5954                 /* can be retrieved by unprivileged users */
5955         },
5956         {
5957                 .cmd = DEVLINK_CMD_SB_POOL_GET,
5958                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5959                 .doit = devlink_nl_cmd_sb_pool_get_doit,
5960                 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
5961                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5962                                   DEVLINK_NL_FLAG_NEED_SB,
5963                 /* can be retrieved by unprivileged users */
5964         },
5965         {
5966                 .cmd = DEVLINK_CMD_SB_POOL_SET,
5967                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5968                 .doit = devlink_nl_cmd_sb_pool_set_doit,
5969                 .flags = GENL_ADMIN_PERM,
5970                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5971                                   DEVLINK_NL_FLAG_NEED_SB,
5972         },
5973         {
5974                 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
5975                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5976                 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
5977                 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
5978                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5979                                   DEVLINK_NL_FLAG_NEED_SB,
5980                 /* can be retrieved by unprivileged users */
5981         },
5982         {
5983                 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
5984                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5985                 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
5986                 .flags = GENL_ADMIN_PERM,
5987                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5988                                   DEVLINK_NL_FLAG_NEED_SB,
5989         },
5990         {
5991                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
5992                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5993                 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
5994                 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
5995                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5996                                   DEVLINK_NL_FLAG_NEED_SB,
5997                 /* can be retrieved by unprivileged users */
5998         },
5999         {
6000                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
6001                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6002                 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
6003                 .flags = GENL_ADMIN_PERM,
6004                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6005                                   DEVLINK_NL_FLAG_NEED_SB,
6006         },
6007         {
6008                 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
6009                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6010                 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
6011                 .flags = GENL_ADMIN_PERM,
6012                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6013                                   DEVLINK_NL_FLAG_NEED_SB,
6014         },
6015         {
6016                 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
6017                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6018                 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
6019                 .flags = GENL_ADMIN_PERM,
6020                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6021                                   DEVLINK_NL_FLAG_NEED_SB,
6022         },
6023         {
6024                 .cmd = DEVLINK_CMD_ESWITCH_GET,
6025                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6026                 .doit = devlink_nl_cmd_eswitch_get_doit,
6027                 .flags = GENL_ADMIN_PERM,
6028                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6029         },
6030         {
6031                 .cmd = DEVLINK_CMD_ESWITCH_SET,
6032                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6033                 .doit = devlink_nl_cmd_eswitch_set_doit,
6034                 .flags = GENL_ADMIN_PERM,
6035                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6036                                   DEVLINK_NL_FLAG_NO_LOCK,
6037         },
6038         {
6039                 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
6040                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6041                 .doit = devlink_nl_cmd_dpipe_table_get,
6042                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6043                 /* can be retrieved by unprivileged users */
6044         },
6045         {
6046                 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
6047                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6048                 .doit = devlink_nl_cmd_dpipe_entries_get,
6049                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6050                 /* can be retrieved by unprivileged users */
6051         },
6052         {
6053                 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
6054                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6055                 .doit = devlink_nl_cmd_dpipe_headers_get,
6056                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6057                 /* can be retrieved by unprivileged users */
6058         },
6059         {
6060                 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
6061                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6062                 .doit = devlink_nl_cmd_dpipe_table_counters_set,
6063                 .flags = GENL_ADMIN_PERM,
6064                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6065         },
6066         {
6067                 .cmd = DEVLINK_CMD_RESOURCE_SET,
6068                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6069                 .doit = devlink_nl_cmd_resource_set,
6070                 .flags = GENL_ADMIN_PERM,
6071                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6072         },
6073         {
6074                 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
6075                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6076                 .doit = devlink_nl_cmd_resource_dump,
6077                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6078                 /* can be retrieved by unprivileged users */
6079         },
6080         {
6081                 .cmd = DEVLINK_CMD_RELOAD,
6082                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6083                 .doit = devlink_nl_cmd_reload,
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_PARAM_GET,
6090                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6091                 .doit = devlink_nl_cmd_param_get_doit,
6092                 .dumpit = devlink_nl_cmd_param_get_dumpit,
6093                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6094                 /* can be retrieved by unprivileged users */
6095         },
6096         {
6097                 .cmd = DEVLINK_CMD_PARAM_SET,
6098                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6099                 .doit = devlink_nl_cmd_param_set_doit,
6100                 .flags = GENL_ADMIN_PERM,
6101                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6102         },
6103         {
6104                 .cmd = DEVLINK_CMD_PORT_PARAM_GET,
6105                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6106                 .doit = devlink_nl_cmd_port_param_get_doit,
6107                 .dumpit = devlink_nl_cmd_port_param_get_dumpit,
6108                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6109                 /* can be retrieved by unprivileged users */
6110         },
6111         {
6112                 .cmd = DEVLINK_CMD_PORT_PARAM_SET,
6113                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6114                 .doit = devlink_nl_cmd_port_param_set_doit,
6115                 .flags = GENL_ADMIN_PERM,
6116                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6117         },
6118         {
6119                 .cmd = DEVLINK_CMD_REGION_GET,
6120                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6121                 .doit = devlink_nl_cmd_region_get_doit,
6122                 .dumpit = devlink_nl_cmd_region_get_dumpit,
6123                 .flags = GENL_ADMIN_PERM,
6124                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6125         },
6126         {
6127                 .cmd = DEVLINK_CMD_REGION_DEL,
6128                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6129                 .doit = devlink_nl_cmd_region_del,
6130                 .flags = GENL_ADMIN_PERM,
6131                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6132         },
6133         {
6134                 .cmd = DEVLINK_CMD_REGION_READ,
6135                 .validate = GENL_DONT_VALIDATE_STRICT |
6136                             GENL_DONT_VALIDATE_DUMP_STRICT,
6137                 .dumpit = devlink_nl_cmd_region_read_dumpit,
6138                 .flags = GENL_ADMIN_PERM,
6139                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6140         },
6141         {
6142                 .cmd = DEVLINK_CMD_INFO_GET,
6143                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6144                 .doit = devlink_nl_cmd_info_get_doit,
6145                 .dumpit = devlink_nl_cmd_info_get_dumpit,
6146                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6147                 /* can be retrieved by unprivileged users */
6148         },
6149         {
6150                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
6151                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6152                 .doit = devlink_nl_cmd_health_reporter_get_doit,
6153                 .dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
6154                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6155                                   DEVLINK_NL_FLAG_NO_LOCK,
6156                 /* can be retrieved by unprivileged users */
6157         },
6158         {
6159                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
6160                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6161                 .doit = devlink_nl_cmd_health_reporter_set_doit,
6162                 .flags = GENL_ADMIN_PERM,
6163                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6164                                   DEVLINK_NL_FLAG_NO_LOCK,
6165         },
6166         {
6167                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
6168                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6169                 .doit = devlink_nl_cmd_health_reporter_recover_doit,
6170                 .flags = GENL_ADMIN_PERM,
6171                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6172                                   DEVLINK_NL_FLAG_NO_LOCK,
6173         },
6174         {
6175                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
6176                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6177                 .doit = devlink_nl_cmd_health_reporter_diagnose_doit,
6178                 .flags = GENL_ADMIN_PERM,
6179                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6180                                   DEVLINK_NL_FLAG_NO_LOCK,
6181         },
6182         {
6183                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
6184                 .validate = GENL_DONT_VALIDATE_STRICT |
6185                             GENL_DONT_VALIDATE_DUMP_STRICT,
6186                 .dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
6187                 .flags = GENL_ADMIN_PERM,
6188                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6189                                   DEVLINK_NL_FLAG_NO_LOCK,
6190         },
6191         {
6192                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
6193                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6194                 .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
6195                 .flags = GENL_ADMIN_PERM,
6196                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6197                                   DEVLINK_NL_FLAG_NO_LOCK,
6198         },
6199         {
6200                 .cmd = DEVLINK_CMD_FLASH_UPDATE,
6201                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6202                 .doit = devlink_nl_cmd_flash_update,
6203                 .flags = GENL_ADMIN_PERM,
6204                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6205         },
6206         {
6207                 .cmd = DEVLINK_CMD_TRAP_GET,
6208                 .doit = devlink_nl_cmd_trap_get_doit,
6209                 .dumpit = devlink_nl_cmd_trap_get_dumpit,
6210                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6211                 /* can be retrieved by unprivileged users */
6212         },
6213         {
6214                 .cmd = DEVLINK_CMD_TRAP_SET,
6215                 .doit = devlink_nl_cmd_trap_set_doit,
6216                 .flags = GENL_ADMIN_PERM,
6217                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6218         },
6219         {
6220                 .cmd = DEVLINK_CMD_TRAP_GROUP_GET,
6221                 .doit = devlink_nl_cmd_trap_group_get_doit,
6222                 .dumpit = devlink_nl_cmd_trap_group_get_dumpit,
6223                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6224                 /* can be retrieved by unprivileged users */
6225         },
6226         {
6227                 .cmd = DEVLINK_CMD_TRAP_GROUP_SET,
6228                 .doit = devlink_nl_cmd_trap_group_set_doit,
6229                 .flags = GENL_ADMIN_PERM,
6230                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6231         },
6232 };
6233
6234 static struct genl_family devlink_nl_family __ro_after_init = {
6235         .name           = DEVLINK_GENL_NAME,
6236         .version        = DEVLINK_GENL_VERSION,
6237         .maxattr        = DEVLINK_ATTR_MAX,
6238         .policy = devlink_nl_policy,
6239         .netnsok        = true,
6240         .pre_doit       = devlink_nl_pre_doit,
6241         .post_doit      = devlink_nl_post_doit,
6242         .module         = THIS_MODULE,
6243         .ops            = devlink_nl_ops,
6244         .n_ops          = ARRAY_SIZE(devlink_nl_ops),
6245         .mcgrps         = devlink_nl_mcgrps,
6246         .n_mcgrps       = ARRAY_SIZE(devlink_nl_mcgrps),
6247 };
6248
6249 /**
6250  *      devlink_alloc - Allocate new devlink instance resources
6251  *
6252  *      @ops: ops
6253  *      @priv_size: size of user private data
6254  *
6255  *      Allocate new devlink instance resources, including devlink index
6256  *      and name.
6257  */
6258 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
6259 {
6260         struct devlink *devlink;
6261
6262         if (WARN_ON(!ops))
6263                 return NULL;
6264
6265         devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
6266         if (!devlink)
6267                 return NULL;
6268         devlink->ops = ops;
6269         __devlink_net_set(devlink, &init_net);
6270         INIT_LIST_HEAD(&devlink->port_list);
6271         INIT_LIST_HEAD(&devlink->sb_list);
6272         INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
6273         INIT_LIST_HEAD(&devlink->resource_list);
6274         INIT_LIST_HEAD(&devlink->param_list);
6275         INIT_LIST_HEAD(&devlink->region_list);
6276         INIT_LIST_HEAD(&devlink->reporter_list);
6277         INIT_LIST_HEAD(&devlink->trap_list);
6278         INIT_LIST_HEAD(&devlink->trap_group_list);
6279         mutex_init(&devlink->lock);
6280         mutex_init(&devlink->reporters_lock);
6281         return devlink;
6282 }
6283 EXPORT_SYMBOL_GPL(devlink_alloc);
6284
6285 /**
6286  *      devlink_register - Register devlink instance
6287  *
6288  *      @devlink: devlink
6289  *      @dev: parent device
6290  */
6291 int devlink_register(struct devlink *devlink, struct device *dev)
6292 {
6293         mutex_lock(&devlink_mutex);
6294         devlink->dev = dev;
6295         devlink->registered = true;
6296         list_add_tail(&devlink->list, &devlink_list);
6297         devlink_notify(devlink, DEVLINK_CMD_NEW);
6298         mutex_unlock(&devlink_mutex);
6299         return 0;
6300 }
6301 EXPORT_SYMBOL_GPL(devlink_register);
6302
6303 /**
6304  *      devlink_unregister - Unregister devlink instance
6305  *
6306  *      @devlink: devlink
6307  */
6308 void devlink_unregister(struct devlink *devlink)
6309 {
6310         mutex_lock(&devlink_mutex);
6311         devlink_notify(devlink, DEVLINK_CMD_DEL);
6312         list_del(&devlink->list);
6313         mutex_unlock(&devlink_mutex);
6314 }
6315 EXPORT_SYMBOL_GPL(devlink_unregister);
6316
6317 /**
6318  *      devlink_free - Free devlink instance resources
6319  *
6320  *      @devlink: devlink
6321  */
6322 void devlink_free(struct devlink *devlink)
6323 {
6324         mutex_destroy(&devlink->reporters_lock);
6325         mutex_destroy(&devlink->lock);
6326         WARN_ON(!list_empty(&devlink->trap_group_list));
6327         WARN_ON(!list_empty(&devlink->trap_list));
6328         WARN_ON(!list_empty(&devlink->reporter_list));
6329         WARN_ON(!list_empty(&devlink->region_list));
6330         WARN_ON(!list_empty(&devlink->param_list));
6331         WARN_ON(!list_empty(&devlink->resource_list));
6332         WARN_ON(!list_empty(&devlink->dpipe_table_list));
6333         WARN_ON(!list_empty(&devlink->sb_list));
6334         WARN_ON(!list_empty(&devlink->port_list));
6335
6336         kfree(devlink);
6337 }
6338 EXPORT_SYMBOL_GPL(devlink_free);
6339
6340 static void devlink_port_type_warn(struct work_struct *work)
6341 {
6342         WARN(true, "Type was not set for devlink port.");
6343 }
6344
6345 static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
6346 {
6347         /* Ignore CPU and DSA flavours. */
6348         return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
6349                devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA;
6350 }
6351
6352 #define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 30)
6353
6354 static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
6355 {
6356         if (!devlink_port_type_should_warn(devlink_port))
6357                 return;
6358         /* Schedule a work to WARN in case driver does not set port
6359          * type within timeout.
6360          */
6361         schedule_delayed_work(&devlink_port->type_warn_dw,
6362                               DEVLINK_PORT_TYPE_WARN_TIMEOUT);
6363 }
6364
6365 static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
6366 {
6367         if (!devlink_port_type_should_warn(devlink_port))
6368                 return;
6369         cancel_delayed_work_sync(&devlink_port->type_warn_dw);
6370 }
6371
6372 /**
6373  *      devlink_port_register - Register devlink port
6374  *
6375  *      @devlink: devlink
6376  *      @devlink_port: devlink port
6377  *      @port_index: driver-specific numerical identifier of the port
6378  *
6379  *      Register devlink port with provided port index. User can use
6380  *      any indexing, even hw-related one. devlink_port structure
6381  *      is convenient to be embedded inside user driver private structure.
6382  *      Note that the caller should take care of zeroing the devlink_port
6383  *      structure.
6384  */
6385 int devlink_port_register(struct devlink *devlink,
6386                           struct devlink_port *devlink_port,
6387                           unsigned int port_index)
6388 {
6389         mutex_lock(&devlink->lock);
6390         if (devlink_port_index_exists(devlink, port_index)) {
6391                 mutex_unlock(&devlink->lock);
6392                 return -EEXIST;
6393         }
6394         devlink_port->devlink = devlink;
6395         devlink_port->index = port_index;
6396         devlink_port->registered = true;
6397         spin_lock_init(&devlink_port->type_lock);
6398         list_add_tail(&devlink_port->list, &devlink->port_list);
6399         INIT_LIST_HEAD(&devlink_port->param_list);
6400         mutex_unlock(&devlink->lock);
6401         INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
6402         devlink_port_type_warn_schedule(devlink_port);
6403         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
6404         return 0;
6405 }
6406 EXPORT_SYMBOL_GPL(devlink_port_register);
6407
6408 /**
6409  *      devlink_port_unregister - Unregister devlink port
6410  *
6411  *      @devlink_port: devlink port
6412  */
6413 void devlink_port_unregister(struct devlink_port *devlink_port)
6414 {
6415         struct devlink *devlink = devlink_port->devlink;
6416
6417         devlink_port_type_warn_cancel(devlink_port);
6418         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
6419         mutex_lock(&devlink->lock);
6420         list_del(&devlink_port->list);
6421         mutex_unlock(&devlink->lock);
6422 }
6423 EXPORT_SYMBOL_GPL(devlink_port_unregister);
6424
6425 static void __devlink_port_type_set(struct devlink_port *devlink_port,
6426                                     enum devlink_port_type type,
6427                                     void *type_dev)
6428 {
6429         if (WARN_ON(!devlink_port->registered))
6430                 return;
6431         devlink_port_type_warn_cancel(devlink_port);
6432         spin_lock_bh(&devlink_port->type_lock);
6433         devlink_port->type = type;
6434         devlink_port->type_dev = type_dev;
6435         spin_unlock_bh(&devlink_port->type_lock);
6436         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
6437 }
6438
6439 /**
6440  *      devlink_port_type_eth_set - Set port type to Ethernet
6441  *
6442  *      @devlink_port: devlink port
6443  *      @netdev: related netdevice
6444  */
6445 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
6446                                struct net_device *netdev)
6447 {
6448         const struct net_device_ops *ops = netdev->netdev_ops;
6449
6450         /* If driver registers devlink port, it should set devlink port
6451          * attributes accordingly so the compat functions are called
6452          * and the original ops are not used.
6453          */
6454         if (ops->ndo_get_phys_port_name) {
6455                 /* Some drivers use the same set of ndos for netdevs
6456                  * that have devlink_port registered and also for
6457                  * those who don't. Make sure that ndo_get_phys_port_name
6458                  * returns -EOPNOTSUPP here in case it is defined.
6459                  * Warn if not.
6460                  */
6461                 char name[IFNAMSIZ];
6462                 int err;
6463
6464                 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
6465                 WARN_ON(err != -EOPNOTSUPP);
6466         }
6467         if (ops->ndo_get_port_parent_id) {
6468                 /* Some drivers use the same set of ndos for netdevs
6469                  * that have devlink_port registered and also for
6470                  * those who don't. Make sure that ndo_get_port_parent_id
6471                  * returns -EOPNOTSUPP here in case it is defined.
6472                  * Warn if not.
6473                  */
6474                 struct netdev_phys_item_id ppid;
6475                 int err;
6476
6477                 err = ops->ndo_get_port_parent_id(netdev, &ppid);
6478                 WARN_ON(err != -EOPNOTSUPP);
6479         }
6480         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, netdev);
6481 }
6482 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
6483
6484 /**
6485  *      devlink_port_type_ib_set - Set port type to InfiniBand
6486  *
6487  *      @devlink_port: devlink port
6488  *      @ibdev: related IB device
6489  */
6490 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
6491                               struct ib_device *ibdev)
6492 {
6493         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
6494 }
6495 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
6496
6497 /**
6498  *      devlink_port_type_clear - Clear port type
6499  *
6500  *      @devlink_port: devlink port
6501  */
6502 void devlink_port_type_clear(struct devlink_port *devlink_port)
6503 {
6504         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
6505         devlink_port_type_warn_schedule(devlink_port);
6506 }
6507 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
6508
6509 static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
6510                                     enum devlink_port_flavour flavour,
6511                                     const unsigned char *switch_id,
6512                                     unsigned char switch_id_len)
6513 {
6514         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6515
6516         if (WARN_ON(devlink_port->registered))
6517                 return -EEXIST;
6518         attrs->set = true;
6519         attrs->flavour = flavour;
6520         if (switch_id) {
6521                 attrs->switch_port = true;
6522                 if (WARN_ON(switch_id_len > MAX_PHYS_ITEM_ID_LEN))
6523                         switch_id_len = MAX_PHYS_ITEM_ID_LEN;
6524                 memcpy(attrs->switch_id.id, switch_id, switch_id_len);
6525                 attrs->switch_id.id_len = switch_id_len;
6526         } else {
6527                 attrs->switch_port = false;
6528         }
6529         return 0;
6530 }
6531
6532 /**
6533  *      devlink_port_attrs_set - Set port attributes
6534  *
6535  *      @devlink_port: devlink port
6536  *      @flavour: flavour of the port
6537  *      @port_number: number of the port that is facing user, for example
6538  *                    the front panel port number
6539  *      @split: indicates if this is split port
6540  *      @split_subport_number: if the port is split, this is the number
6541  *                             of subport.
6542  *      @switch_id: if the port is part of switch, this is buffer with ID,
6543  *                  otwerwise this is NULL
6544  *      @switch_id_len: length of the switch_id buffer
6545  */
6546 void devlink_port_attrs_set(struct devlink_port *devlink_port,
6547                             enum devlink_port_flavour flavour,
6548                             u32 port_number, bool split,
6549                             u32 split_subport_number,
6550                             const unsigned char *switch_id,
6551                             unsigned char switch_id_len)
6552 {
6553         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6554         int ret;
6555
6556         ret = __devlink_port_attrs_set(devlink_port, flavour,
6557                                        switch_id, switch_id_len);
6558         if (ret)
6559                 return;
6560         attrs->split = split;
6561         attrs->phys.port_number = port_number;
6562         attrs->phys.split_subport_number = split_subport_number;
6563 }
6564 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
6565
6566 /**
6567  *      devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
6568  *
6569  *      @devlink_port: devlink port
6570  *      @pf: associated PF for the devlink port instance
6571  *      @switch_id: if the port is part of switch, this is buffer with ID,
6572  *                  otherwise this is NULL
6573  *      @switch_id_len: length of the switch_id buffer
6574  */
6575 void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port,
6576                                    const unsigned char *switch_id,
6577                                    unsigned char switch_id_len, u16 pf)
6578 {
6579         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6580         int ret;
6581
6582         ret = __devlink_port_attrs_set(devlink_port,
6583                                        DEVLINK_PORT_FLAVOUR_PCI_PF,
6584                                        switch_id, switch_id_len);
6585         if (ret)
6586                 return;
6587
6588         attrs->pci_pf.pf = pf;
6589 }
6590 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
6591
6592 /**
6593  *      devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
6594  *
6595  *      @devlink_port: devlink port
6596  *      @pf: associated PF for the devlink port instance
6597  *      @vf: associated VF of a PF for the devlink port instance
6598  *      @switch_id: if the port is part of switch, this is buffer with ID,
6599  *                  otherwise this is NULL
6600  *      @switch_id_len: length of the switch_id buffer
6601  */
6602 void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port,
6603                                    const unsigned char *switch_id,
6604                                    unsigned char switch_id_len,
6605                                    u16 pf, u16 vf)
6606 {
6607         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6608         int ret;
6609
6610         ret = __devlink_port_attrs_set(devlink_port,
6611                                        DEVLINK_PORT_FLAVOUR_PCI_VF,
6612                                        switch_id, switch_id_len);
6613         if (ret)
6614                 return;
6615         attrs->pci_vf.pf = pf;
6616         attrs->pci_vf.vf = vf;
6617 }
6618 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
6619
6620 static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
6621                                              char *name, size_t len)
6622 {
6623         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6624         int n = 0;
6625
6626         if (!attrs->set)
6627                 return -EOPNOTSUPP;
6628
6629         switch (attrs->flavour) {
6630         case DEVLINK_PORT_FLAVOUR_PHYSICAL:
6631                 if (!attrs->split)
6632                         n = snprintf(name, len, "p%u", attrs->phys.port_number);
6633                 else
6634                         n = snprintf(name, len, "p%us%u",
6635                                      attrs->phys.port_number,
6636                                      attrs->phys.split_subport_number);
6637                 break;
6638         case DEVLINK_PORT_FLAVOUR_CPU:
6639         case DEVLINK_PORT_FLAVOUR_DSA:
6640                 /* As CPU and DSA ports do not have a netdevice associated
6641                  * case should not ever happen.
6642                  */
6643                 WARN_ON(1);
6644                 return -EINVAL;
6645         case DEVLINK_PORT_FLAVOUR_PCI_PF:
6646                 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
6647                 break;
6648         case DEVLINK_PORT_FLAVOUR_PCI_VF:
6649                 n = snprintf(name, len, "pf%uvf%u",
6650                              attrs->pci_vf.pf, attrs->pci_vf.vf);
6651                 break;
6652         }
6653
6654         if (n >= len)
6655                 return -EINVAL;
6656
6657         return 0;
6658 }
6659
6660 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
6661                         u32 size, u16 ingress_pools_count,
6662                         u16 egress_pools_count, u16 ingress_tc_count,
6663                         u16 egress_tc_count)
6664 {
6665         struct devlink_sb *devlink_sb;
6666         int err = 0;
6667
6668         mutex_lock(&devlink->lock);
6669         if (devlink_sb_index_exists(devlink, sb_index)) {
6670                 err = -EEXIST;
6671                 goto unlock;
6672         }
6673
6674         devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
6675         if (!devlink_sb) {
6676                 err = -ENOMEM;
6677                 goto unlock;
6678         }
6679         devlink_sb->index = sb_index;
6680         devlink_sb->size = size;
6681         devlink_sb->ingress_pools_count = ingress_pools_count;
6682         devlink_sb->egress_pools_count = egress_pools_count;
6683         devlink_sb->ingress_tc_count = ingress_tc_count;
6684         devlink_sb->egress_tc_count = egress_tc_count;
6685         list_add_tail(&devlink_sb->list, &devlink->sb_list);
6686 unlock:
6687         mutex_unlock(&devlink->lock);
6688         return err;
6689 }
6690 EXPORT_SYMBOL_GPL(devlink_sb_register);
6691
6692 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
6693 {
6694         struct devlink_sb *devlink_sb;
6695
6696         mutex_lock(&devlink->lock);
6697         devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
6698         WARN_ON(!devlink_sb);
6699         list_del(&devlink_sb->list);
6700         mutex_unlock(&devlink->lock);
6701         kfree(devlink_sb);
6702 }
6703 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
6704
6705 /**
6706  *      devlink_dpipe_headers_register - register dpipe headers
6707  *
6708  *      @devlink: devlink
6709  *      @dpipe_headers: dpipe header array
6710  *
6711  *      Register the headers supported by hardware.
6712  */
6713 int devlink_dpipe_headers_register(struct devlink *devlink,
6714                                    struct devlink_dpipe_headers *dpipe_headers)
6715 {
6716         mutex_lock(&devlink->lock);
6717         devlink->dpipe_headers = dpipe_headers;
6718         mutex_unlock(&devlink->lock);
6719         return 0;
6720 }
6721 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
6722
6723 /**
6724  *      devlink_dpipe_headers_unregister - unregister dpipe headers
6725  *
6726  *      @devlink: devlink
6727  *
6728  *      Unregister the headers supported by hardware.
6729  */
6730 void devlink_dpipe_headers_unregister(struct devlink *devlink)
6731 {
6732         mutex_lock(&devlink->lock);
6733         devlink->dpipe_headers = NULL;
6734         mutex_unlock(&devlink->lock);
6735 }
6736 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
6737
6738 /**
6739  *      devlink_dpipe_table_counter_enabled - check if counter allocation
6740  *                                            required
6741  *      @devlink: devlink
6742  *      @table_name: tables name
6743  *
6744  *      Used by driver to check if counter allocation is required.
6745  *      After counter allocation is turned on the table entries
6746  *      are updated to include counter statistics.
6747  *
6748  *      After that point on the driver must respect the counter
6749  *      state so that each entry added to the table is added
6750  *      with a counter.
6751  */
6752 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
6753                                          const char *table_name)
6754 {
6755         struct devlink_dpipe_table *table;
6756         bool enabled;
6757
6758         rcu_read_lock();
6759         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
6760                                          table_name);
6761         enabled = false;
6762         if (table)
6763                 enabled = table->counters_enabled;
6764         rcu_read_unlock();
6765         return enabled;
6766 }
6767 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
6768
6769 /**
6770  *      devlink_dpipe_table_register - register dpipe table
6771  *
6772  *      @devlink: devlink
6773  *      @table_name: table name
6774  *      @table_ops: table ops
6775  *      @priv: priv
6776  *      @counter_control_extern: external control for counters
6777  */
6778 int devlink_dpipe_table_register(struct devlink *devlink,
6779                                  const char *table_name,
6780                                  struct devlink_dpipe_table_ops *table_ops,
6781                                  void *priv, bool counter_control_extern)
6782 {
6783         struct devlink_dpipe_table *table;
6784
6785         if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name))
6786                 return -EEXIST;
6787
6788         if (WARN_ON(!table_ops->size_get))
6789                 return -EINVAL;
6790
6791         table = kzalloc(sizeof(*table), GFP_KERNEL);
6792         if (!table)
6793                 return -ENOMEM;
6794
6795         table->name = table_name;
6796         table->table_ops = table_ops;
6797         table->priv = priv;
6798         table->counter_control_extern = counter_control_extern;
6799
6800         mutex_lock(&devlink->lock);
6801         list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
6802         mutex_unlock(&devlink->lock);
6803         return 0;
6804 }
6805 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
6806
6807 /**
6808  *      devlink_dpipe_table_unregister - unregister dpipe table
6809  *
6810  *      @devlink: devlink
6811  *      @table_name: table name
6812  */
6813 void devlink_dpipe_table_unregister(struct devlink *devlink,
6814                                     const char *table_name)
6815 {
6816         struct devlink_dpipe_table *table;
6817
6818         mutex_lock(&devlink->lock);
6819         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
6820                                          table_name);
6821         if (!table)
6822                 goto unlock;
6823         list_del_rcu(&table->list);
6824         mutex_unlock(&devlink->lock);
6825         kfree_rcu(table, rcu);
6826         return;
6827 unlock:
6828         mutex_unlock(&devlink->lock);
6829 }
6830 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
6831
6832 /**
6833  *      devlink_resource_register - devlink resource register
6834  *
6835  *      @devlink: devlink
6836  *      @resource_name: resource's name
6837  *      @resource_size: resource's size
6838  *      @resource_id: resource's id
6839  *      @parent_resource_id: resource's parent id
6840  *      @size_params: size parameters
6841  */
6842 int devlink_resource_register(struct devlink *devlink,
6843                               const char *resource_name,
6844                               u64 resource_size,
6845                               u64 resource_id,
6846                               u64 parent_resource_id,
6847                               const struct devlink_resource_size_params *size_params)
6848 {
6849         struct devlink_resource *resource;
6850         struct list_head *resource_list;
6851         bool top_hierarchy;
6852         int err = 0;
6853
6854         top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
6855
6856         mutex_lock(&devlink->lock);
6857         resource = devlink_resource_find(devlink, NULL, resource_id);
6858         if (resource) {
6859                 err = -EINVAL;
6860                 goto out;
6861         }
6862
6863         resource = kzalloc(sizeof(*resource), GFP_KERNEL);
6864         if (!resource) {
6865                 err = -ENOMEM;
6866                 goto out;
6867         }
6868
6869         if (top_hierarchy) {
6870                 resource_list = &devlink->resource_list;
6871         } else {
6872                 struct devlink_resource *parent_resource;
6873
6874                 parent_resource = devlink_resource_find(devlink, NULL,
6875                                                         parent_resource_id);
6876                 if (parent_resource) {
6877                         resource_list = &parent_resource->resource_list;
6878                         resource->parent = parent_resource;
6879                 } else {
6880                         kfree(resource);
6881                         err = -EINVAL;
6882                         goto out;
6883                 }
6884         }
6885
6886         resource->name = resource_name;
6887         resource->size = resource_size;
6888         resource->size_new = resource_size;
6889         resource->id = resource_id;
6890         resource->size_valid = true;
6891         memcpy(&resource->size_params, size_params,
6892                sizeof(resource->size_params));
6893         INIT_LIST_HEAD(&resource->resource_list);
6894         list_add_tail(&resource->list, resource_list);
6895 out:
6896         mutex_unlock(&devlink->lock);
6897         return err;
6898 }
6899 EXPORT_SYMBOL_GPL(devlink_resource_register);
6900
6901 /**
6902  *      devlink_resources_unregister - free all resources
6903  *
6904  *      @devlink: devlink
6905  *      @resource: resource
6906  */
6907 void devlink_resources_unregister(struct devlink *devlink,
6908                                   struct devlink_resource *resource)
6909 {
6910         struct devlink_resource *tmp, *child_resource;
6911         struct list_head *resource_list;
6912
6913         if (resource)
6914                 resource_list = &resource->resource_list;
6915         else
6916                 resource_list = &devlink->resource_list;
6917
6918         if (!resource)
6919                 mutex_lock(&devlink->lock);
6920
6921         list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
6922                 devlink_resources_unregister(devlink, child_resource);
6923                 list_del(&child_resource->list);
6924                 kfree(child_resource);
6925         }
6926
6927         if (!resource)
6928                 mutex_unlock(&devlink->lock);
6929 }
6930 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
6931
6932 /**
6933  *      devlink_resource_size_get - get and update size
6934  *
6935  *      @devlink: devlink
6936  *      @resource_id: the requested resource id
6937  *      @p_resource_size: ptr to update
6938  */
6939 int devlink_resource_size_get(struct devlink *devlink,
6940                               u64 resource_id,
6941                               u64 *p_resource_size)
6942 {
6943         struct devlink_resource *resource;
6944         int err = 0;
6945
6946         mutex_lock(&devlink->lock);
6947         resource = devlink_resource_find(devlink, NULL, resource_id);
6948         if (!resource) {
6949                 err = -EINVAL;
6950                 goto out;
6951         }
6952         *p_resource_size = resource->size_new;
6953         resource->size = resource->size_new;
6954 out:
6955         mutex_unlock(&devlink->lock);
6956         return err;
6957 }
6958 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
6959
6960 /**
6961  *      devlink_dpipe_table_resource_set - set the resource id
6962  *
6963  *      @devlink: devlink
6964  *      @table_name: table name
6965  *      @resource_id: resource id
6966  *      @resource_units: number of resource's units consumed per table's entry
6967  */
6968 int devlink_dpipe_table_resource_set(struct devlink *devlink,
6969                                      const char *table_name, u64 resource_id,
6970                                      u64 resource_units)
6971 {
6972         struct devlink_dpipe_table *table;
6973         int err = 0;
6974
6975         mutex_lock(&devlink->lock);
6976         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
6977                                          table_name);
6978         if (!table) {
6979                 err = -EINVAL;
6980                 goto out;
6981         }
6982         table->resource_id = resource_id;
6983         table->resource_units = resource_units;
6984         table->resource_valid = true;
6985 out:
6986         mutex_unlock(&devlink->lock);
6987         return err;
6988 }
6989 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
6990
6991 /**
6992  *      devlink_resource_occ_get_register - register occupancy getter
6993  *
6994  *      @devlink: devlink
6995  *      @resource_id: resource id
6996  *      @occ_get: occupancy getter callback
6997  *      @occ_get_priv: occupancy getter callback priv
6998  */
6999 void devlink_resource_occ_get_register(struct devlink *devlink,
7000                                        u64 resource_id,
7001                                        devlink_resource_occ_get_t *occ_get,
7002                                        void *occ_get_priv)
7003 {
7004         struct devlink_resource *resource;
7005
7006         mutex_lock(&devlink->lock);
7007         resource = devlink_resource_find(devlink, NULL, resource_id);
7008         if (WARN_ON(!resource))
7009                 goto out;
7010         WARN_ON(resource->occ_get);
7011
7012         resource->occ_get = occ_get;
7013         resource->occ_get_priv = occ_get_priv;
7014 out:
7015         mutex_unlock(&devlink->lock);
7016 }
7017 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
7018
7019 /**
7020  *      devlink_resource_occ_get_unregister - unregister occupancy getter
7021  *
7022  *      @devlink: devlink
7023  *      @resource_id: resource id
7024  */
7025 void devlink_resource_occ_get_unregister(struct devlink *devlink,
7026                                          u64 resource_id)
7027 {
7028         struct devlink_resource *resource;
7029
7030         mutex_lock(&devlink->lock);
7031         resource = devlink_resource_find(devlink, NULL, resource_id);
7032         if (WARN_ON(!resource))
7033                 goto out;
7034         WARN_ON(!resource->occ_get);
7035
7036         resource->occ_get = NULL;
7037         resource->occ_get_priv = NULL;
7038 out:
7039         mutex_unlock(&devlink->lock);
7040 }
7041 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
7042
7043 static int devlink_param_verify(const struct devlink_param *param)
7044 {
7045         if (!param || !param->name || !param->supported_cmodes)
7046                 return -EINVAL;
7047         if (param->generic)
7048                 return devlink_param_generic_verify(param);
7049         else
7050                 return devlink_param_driver_verify(param);
7051 }
7052
7053 static int __devlink_params_register(struct devlink *devlink,
7054                                      unsigned int port_index,
7055                                      struct list_head *param_list,
7056                                      const struct devlink_param *params,
7057                                      size_t params_count,
7058                                      enum devlink_command reg_cmd,
7059                                      enum devlink_command unreg_cmd)
7060 {
7061         const struct devlink_param *param = params;
7062         int i;
7063         int err;
7064
7065         mutex_lock(&devlink->lock);
7066         for (i = 0; i < params_count; i++, param++) {
7067                 err = devlink_param_verify(param);
7068                 if (err)
7069                         goto rollback;
7070
7071                 err = devlink_param_register_one(devlink, port_index,
7072                                                  param_list, param, reg_cmd);
7073                 if (err)
7074                         goto rollback;
7075         }
7076
7077         mutex_unlock(&devlink->lock);
7078         return 0;
7079
7080 rollback:
7081         if (!i)
7082                 goto unlock;
7083         for (param--; i > 0; i--, param--)
7084                 devlink_param_unregister_one(devlink, port_index, param_list,
7085                                              param, unreg_cmd);
7086 unlock:
7087         mutex_unlock(&devlink->lock);
7088         return err;
7089 }
7090
7091 static void __devlink_params_unregister(struct devlink *devlink,
7092                                         unsigned int port_index,
7093                                         struct list_head *param_list,
7094                                         const struct devlink_param *params,
7095                                         size_t params_count,
7096                                         enum devlink_command cmd)
7097 {
7098         const struct devlink_param *param = params;
7099         int i;
7100
7101         mutex_lock(&devlink->lock);
7102         for (i = 0; i < params_count; i++, param++)
7103                 devlink_param_unregister_one(devlink, 0, param_list, param,
7104                                              cmd);
7105         mutex_unlock(&devlink->lock);
7106 }
7107
7108 /**
7109  *      devlink_params_register - register configuration parameters
7110  *
7111  *      @devlink: devlink
7112  *      @params: configuration parameters array
7113  *      @params_count: number of parameters provided
7114  *
7115  *      Register the configuration parameters supported by the driver.
7116  */
7117 int devlink_params_register(struct devlink *devlink,
7118                             const struct devlink_param *params,
7119                             size_t params_count)
7120 {
7121         return __devlink_params_register(devlink, 0, &devlink->param_list,
7122                                          params, params_count,
7123                                          DEVLINK_CMD_PARAM_NEW,
7124                                          DEVLINK_CMD_PARAM_DEL);
7125 }
7126 EXPORT_SYMBOL_GPL(devlink_params_register);
7127
7128 /**
7129  *      devlink_params_unregister - unregister configuration parameters
7130  *      @devlink: devlink
7131  *      @params: configuration parameters to unregister
7132  *      @params_count: number of parameters provided
7133  */
7134 void devlink_params_unregister(struct devlink *devlink,
7135                                const struct devlink_param *params,
7136                                size_t params_count)
7137 {
7138         return __devlink_params_unregister(devlink, 0, &devlink->param_list,
7139                                            params, params_count,
7140                                            DEVLINK_CMD_PARAM_DEL);
7141 }
7142 EXPORT_SYMBOL_GPL(devlink_params_unregister);
7143
7144 /**
7145  *      devlink_params_publish - publish configuration parameters
7146  *
7147  *      @devlink: devlink
7148  *
7149  *      Publish previously registered configuration parameters.
7150  */
7151 void devlink_params_publish(struct devlink *devlink)
7152 {
7153         struct devlink_param_item *param_item;
7154
7155         list_for_each_entry(param_item, &devlink->param_list, list) {
7156                 if (param_item->published)
7157                         continue;
7158                 param_item->published = true;
7159                 devlink_param_notify(devlink, 0, param_item,
7160                                      DEVLINK_CMD_PARAM_NEW);
7161         }
7162 }
7163 EXPORT_SYMBOL_GPL(devlink_params_publish);
7164
7165 /**
7166  *      devlink_params_unpublish - unpublish configuration parameters
7167  *
7168  *      @devlink: devlink
7169  *
7170  *      Unpublish previously registered configuration parameters.
7171  */
7172 void devlink_params_unpublish(struct devlink *devlink)
7173 {
7174         struct devlink_param_item *param_item;
7175
7176         list_for_each_entry(param_item, &devlink->param_list, list) {
7177                 if (!param_item->published)
7178                         continue;
7179                 param_item->published = false;
7180                 devlink_param_notify(devlink, 0, param_item,
7181                                      DEVLINK_CMD_PARAM_DEL);
7182         }
7183 }
7184 EXPORT_SYMBOL_GPL(devlink_params_unpublish);
7185
7186 /**
7187  *      devlink_port_params_register - register port configuration parameters
7188  *
7189  *      @devlink_port: devlink port
7190  *      @params: configuration parameters array
7191  *      @params_count: number of parameters provided
7192  *
7193  *      Register the configuration parameters supported by the port.
7194  */
7195 int devlink_port_params_register(struct devlink_port *devlink_port,
7196                                  const struct devlink_param *params,
7197                                  size_t params_count)
7198 {
7199         return __devlink_params_register(devlink_port->devlink,
7200                                          devlink_port->index,
7201                                          &devlink_port->param_list, params,
7202                                          params_count,
7203                                          DEVLINK_CMD_PORT_PARAM_NEW,
7204                                          DEVLINK_CMD_PORT_PARAM_DEL);
7205 }
7206 EXPORT_SYMBOL_GPL(devlink_port_params_register);
7207
7208 /**
7209  *      devlink_port_params_unregister - unregister port configuration
7210  *      parameters
7211  *
7212  *      @devlink_port: devlink port
7213  *      @params: configuration parameters array
7214  *      @params_count: number of parameters provided
7215  */
7216 void devlink_port_params_unregister(struct devlink_port *devlink_port,
7217                                     const struct devlink_param *params,
7218                                     size_t params_count)
7219 {
7220         return __devlink_params_unregister(devlink_port->devlink,
7221                                            devlink_port->index,
7222                                            &devlink_port->param_list,
7223                                            params, params_count,
7224                                            DEVLINK_CMD_PORT_PARAM_DEL);
7225 }
7226 EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
7227
7228 static int
7229 __devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
7230                                      union devlink_param_value *init_val)
7231 {
7232         struct devlink_param_item *param_item;
7233
7234         param_item = devlink_param_find_by_id(param_list, param_id);
7235         if (!param_item)
7236                 return -EINVAL;
7237
7238         if (!param_item->driverinit_value_valid ||
7239             !devlink_param_cmode_is_supported(param_item->param,
7240                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
7241                 return -EOPNOTSUPP;
7242
7243         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
7244                 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
7245         else
7246                 *init_val = param_item->driverinit_value;
7247
7248         return 0;
7249 }
7250
7251 static int
7252 __devlink_param_driverinit_value_set(struct devlink *devlink,
7253                                      unsigned int port_index,
7254                                      struct list_head *param_list, u32 param_id,
7255                                      union devlink_param_value init_val,
7256                                      enum devlink_command cmd)
7257 {
7258         struct devlink_param_item *param_item;
7259
7260         param_item = devlink_param_find_by_id(param_list, param_id);
7261         if (!param_item)
7262                 return -EINVAL;
7263
7264         if (!devlink_param_cmode_is_supported(param_item->param,
7265                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
7266                 return -EOPNOTSUPP;
7267
7268         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
7269                 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
7270         else
7271                 param_item->driverinit_value = init_val;
7272         param_item->driverinit_value_valid = true;
7273
7274         devlink_param_notify(devlink, port_index, param_item, cmd);
7275         return 0;
7276 }
7277
7278 /**
7279  *      devlink_param_driverinit_value_get - get configuration parameter
7280  *                                           value for driver initializing
7281  *
7282  *      @devlink: devlink
7283  *      @param_id: parameter ID
7284  *      @init_val: value of parameter in driverinit configuration mode
7285  *
7286  *      This function should be used by the driver to get driverinit
7287  *      configuration for initialization after reload command.
7288  */
7289 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
7290                                        union devlink_param_value *init_val)
7291 {
7292         if (!devlink_reload_supported(devlink))
7293                 return -EOPNOTSUPP;
7294
7295         return __devlink_param_driverinit_value_get(&devlink->param_list,
7296                                                     param_id, init_val);
7297 }
7298 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
7299
7300 /**
7301  *      devlink_param_driverinit_value_set - set value of configuration
7302  *                                           parameter for driverinit
7303  *                                           configuration mode
7304  *
7305  *      @devlink: devlink
7306  *      @param_id: parameter ID
7307  *      @init_val: value of parameter to set for driverinit configuration mode
7308  *
7309  *      This function should be used by the driver to set driverinit
7310  *      configuration mode default value.
7311  */
7312 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
7313                                        union devlink_param_value init_val)
7314 {
7315         return __devlink_param_driverinit_value_set(devlink, 0,
7316                                                     &devlink->param_list,
7317                                                     param_id, init_val,
7318                                                     DEVLINK_CMD_PARAM_NEW);
7319 }
7320 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
7321
7322 /**
7323  *      devlink_port_param_driverinit_value_get - get configuration parameter
7324  *                                              value for driver initializing
7325  *
7326  *      @devlink_port: devlink_port
7327  *      @param_id: parameter ID
7328  *      @init_val: value of parameter in driverinit configuration mode
7329  *
7330  *      This function should be used by the driver to get driverinit
7331  *      configuration for initialization after reload command.
7332  */
7333 int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port,
7334                                             u32 param_id,
7335                                             union devlink_param_value *init_val)
7336 {
7337         struct devlink *devlink = devlink_port->devlink;
7338
7339         if (!devlink_reload_supported(devlink))
7340                 return -EOPNOTSUPP;
7341
7342         return __devlink_param_driverinit_value_get(&devlink_port->param_list,
7343                                                     param_id, init_val);
7344 }
7345 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get);
7346
7347 /**
7348  *     devlink_port_param_driverinit_value_set - set value of configuration
7349  *                                               parameter for driverinit
7350  *                                               configuration mode
7351  *
7352  *     @devlink_port: devlink_port
7353  *     @param_id: parameter ID
7354  *     @init_val: value of parameter to set for driverinit configuration mode
7355  *
7356  *     This function should be used by the driver to set driverinit
7357  *     configuration mode default value.
7358  */
7359 int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
7360                                             u32 param_id,
7361                                             union devlink_param_value init_val)
7362 {
7363         return __devlink_param_driverinit_value_set(devlink_port->devlink,
7364                                                     devlink_port->index,
7365                                                     &devlink_port->param_list,
7366                                                     param_id, init_val,
7367                                                     DEVLINK_CMD_PORT_PARAM_NEW);
7368 }
7369 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
7370
7371 /**
7372  *      devlink_param_value_changed - notify devlink on a parameter's value
7373  *                                    change. Should be called by the driver
7374  *                                    right after the change.
7375  *
7376  *      @devlink: devlink
7377  *      @param_id: parameter ID
7378  *
7379  *      This function should be used by the driver to notify devlink on value
7380  *      change, excluding driverinit configuration mode.
7381  *      For driverinit configuration mode driver should use the function
7382  */
7383 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
7384 {
7385         struct devlink_param_item *param_item;
7386
7387         param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
7388         WARN_ON(!param_item);
7389
7390         devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
7391 }
7392 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
7393
7394 /**
7395  *     devlink_port_param_value_changed - notify devlink on a parameter's value
7396  *                                      change. Should be called by the driver
7397  *                                      right after the change.
7398  *
7399  *     @devlink_port: devlink_port
7400  *     @param_id: parameter ID
7401  *
7402  *     This function should be used by the driver to notify devlink on value
7403  *     change, excluding driverinit configuration mode.
7404  *     For driverinit configuration mode driver should use the function
7405  *     devlink_port_param_driverinit_value_set() instead.
7406  */
7407 void devlink_port_param_value_changed(struct devlink_port *devlink_port,
7408                                       u32 param_id)
7409 {
7410         struct devlink_param_item *param_item;
7411
7412         param_item = devlink_param_find_by_id(&devlink_port->param_list,
7413                                               param_id);
7414         WARN_ON(!param_item);
7415
7416         devlink_param_notify(devlink_port->devlink, devlink_port->index,
7417                              param_item, DEVLINK_CMD_PORT_PARAM_NEW);
7418 }
7419 EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
7420
7421 /**
7422  *      devlink_param_value_str_fill - Safely fill-up the string preventing
7423  *                                     from overflow of the preallocated buffer
7424  *
7425  *      @dst_val: destination devlink_param_value
7426  *      @src: source buffer
7427  */
7428 void devlink_param_value_str_fill(union devlink_param_value *dst_val,
7429                                   const char *src)
7430 {
7431         size_t len;
7432
7433         len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
7434         WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
7435 }
7436 EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
7437
7438 /**
7439  *      devlink_region_create - create a new address region
7440  *
7441  *      @devlink: devlink
7442  *      @region_name: region name
7443  *      @region_max_snapshots: Maximum supported number of snapshots for region
7444  *      @region_size: size of region
7445  */
7446 struct devlink_region *devlink_region_create(struct devlink *devlink,
7447                                              const char *region_name,
7448                                              u32 region_max_snapshots,
7449                                              u64 region_size)
7450 {
7451         struct devlink_region *region;
7452         int err = 0;
7453
7454         mutex_lock(&devlink->lock);
7455
7456         if (devlink_region_get_by_name(devlink, region_name)) {
7457                 err = -EEXIST;
7458                 goto unlock;
7459         }
7460
7461         region = kzalloc(sizeof(*region), GFP_KERNEL);
7462         if (!region) {
7463                 err = -ENOMEM;
7464                 goto unlock;
7465         }
7466
7467         region->devlink = devlink;
7468         region->max_snapshots = region_max_snapshots;
7469         region->name = region_name;
7470         region->size = region_size;
7471         INIT_LIST_HEAD(&region->snapshot_list);
7472         list_add_tail(&region->list, &devlink->region_list);
7473         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
7474
7475         mutex_unlock(&devlink->lock);
7476         return region;
7477
7478 unlock:
7479         mutex_unlock(&devlink->lock);
7480         return ERR_PTR(err);
7481 }
7482 EXPORT_SYMBOL_GPL(devlink_region_create);
7483
7484 /**
7485  *      devlink_region_destroy - destroy address region
7486  *
7487  *      @region: devlink region to destroy
7488  */
7489 void devlink_region_destroy(struct devlink_region *region)
7490 {
7491         struct devlink *devlink = region->devlink;
7492         struct devlink_snapshot *snapshot, *ts;
7493
7494         mutex_lock(&devlink->lock);
7495
7496         /* Free all snapshots of region */
7497         list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
7498                 devlink_region_snapshot_del(region, snapshot);
7499
7500         list_del(&region->list);
7501
7502         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
7503         mutex_unlock(&devlink->lock);
7504         kfree(region);
7505 }
7506 EXPORT_SYMBOL_GPL(devlink_region_destroy);
7507
7508 /**
7509  *      devlink_region_shapshot_id_get - get snapshot ID
7510  *
7511  *      This callback should be called when adding a new snapshot,
7512  *      Driver should use the same id for multiple snapshots taken
7513  *      on multiple regions at the same time/by the same trigger.
7514  *
7515  *      @devlink: devlink
7516  */
7517 u32 devlink_region_shapshot_id_get(struct devlink *devlink)
7518 {
7519         u32 id;
7520
7521         mutex_lock(&devlink->lock);
7522         id = ++devlink->snapshot_id;
7523         mutex_unlock(&devlink->lock);
7524
7525         return id;
7526 }
7527 EXPORT_SYMBOL_GPL(devlink_region_shapshot_id_get);
7528
7529 /**
7530  *      devlink_region_snapshot_create - create a new snapshot
7531  *      This will add a new snapshot of a region. The snapshot
7532  *      will be stored on the region struct and can be accessed
7533  *      from devlink. This is useful for future analyses of snapshots.
7534  *      Multiple snapshots can be created on a region.
7535  *      The @snapshot_id should be obtained using the getter function.
7536  *
7537  *      @region: devlink region of the snapshot
7538  *      @data: snapshot data
7539  *      @snapshot_id: snapshot id to be created
7540  *      @data_destructor: pointer to destructor function to free data
7541  */
7542 int devlink_region_snapshot_create(struct devlink_region *region,
7543                                    u8 *data, u32 snapshot_id,
7544                                    devlink_snapshot_data_dest_t *data_destructor)
7545 {
7546         struct devlink *devlink = region->devlink;
7547         struct devlink_snapshot *snapshot;
7548         int err;
7549
7550         mutex_lock(&devlink->lock);
7551
7552         /* check if region can hold one more snapshot */
7553         if (region->cur_snapshots == region->max_snapshots) {
7554                 err = -ENOMEM;
7555                 goto unlock;
7556         }
7557
7558         if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
7559                 err = -EEXIST;
7560                 goto unlock;
7561         }
7562
7563         snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
7564         if (!snapshot) {
7565                 err = -ENOMEM;
7566                 goto unlock;
7567         }
7568
7569         snapshot->id = snapshot_id;
7570         snapshot->region = region;
7571         snapshot->data = data;
7572         snapshot->data_destructor = data_destructor;
7573
7574         list_add_tail(&snapshot->list, &region->snapshot_list);
7575
7576         region->cur_snapshots++;
7577
7578         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
7579         mutex_unlock(&devlink->lock);
7580         return 0;
7581
7582 unlock:
7583         mutex_unlock(&devlink->lock);
7584         return err;
7585 }
7586 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
7587
7588 #define DEVLINK_TRAP(_id, _type)                                              \
7589         {                                                                     \
7590                 .type = DEVLINK_TRAP_TYPE_##_type,                            \
7591                 .id = DEVLINK_TRAP_GENERIC_ID_##_id,                          \
7592                 .name = DEVLINK_TRAP_GENERIC_NAME_##_id,                      \
7593         }
7594
7595 static const struct devlink_trap devlink_trap_generic[] = {
7596         DEVLINK_TRAP(SMAC_MC, DROP),
7597         DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
7598         DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
7599         DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
7600         DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
7601         DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
7602         DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
7603         DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
7604         DEVLINK_TRAP(TAIL_DROP, DROP),
7605 };
7606
7607 #define DEVLINK_TRAP_GROUP(_id)                                               \
7608         {                                                                     \
7609                 .id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id,                    \
7610                 .name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id,                \
7611         }
7612
7613 static const struct devlink_trap_group devlink_trap_group_generic[] = {
7614         DEVLINK_TRAP_GROUP(L2_DROPS),
7615         DEVLINK_TRAP_GROUP(L3_DROPS),
7616         DEVLINK_TRAP_GROUP(BUFFER_DROPS),
7617 };
7618
7619 static int devlink_trap_generic_verify(const struct devlink_trap *trap)
7620 {
7621         if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
7622                 return -EINVAL;
7623
7624         if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
7625                 return -EINVAL;
7626
7627         if (trap->type != devlink_trap_generic[trap->id].type)
7628                 return -EINVAL;
7629
7630         return 0;
7631 }
7632
7633 static int devlink_trap_driver_verify(const struct devlink_trap *trap)
7634 {
7635         int i;
7636
7637         if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
7638                 return -EINVAL;
7639
7640         for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
7641                 if (!strcmp(trap->name, devlink_trap_generic[i].name))
7642                         return -EEXIST;
7643         }
7644
7645         return 0;
7646 }
7647
7648 static int devlink_trap_verify(const struct devlink_trap *trap)
7649 {
7650         if (!trap || !trap->name || !trap->group.name)
7651                 return -EINVAL;
7652
7653         if (trap->generic)
7654                 return devlink_trap_generic_verify(trap);
7655         else
7656                 return devlink_trap_driver_verify(trap);
7657 }
7658
7659 static int
7660 devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
7661 {
7662         if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
7663                 return -EINVAL;
7664
7665         if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
7666                 return -EINVAL;
7667
7668         return 0;
7669 }
7670
7671 static int
7672 devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
7673 {
7674         int i;
7675
7676         if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
7677                 return -EINVAL;
7678
7679         for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
7680                 if (!strcmp(group->name, devlink_trap_group_generic[i].name))
7681                         return -EEXIST;
7682         }
7683
7684         return 0;
7685 }
7686
7687 static int devlink_trap_group_verify(const struct devlink_trap_group *group)
7688 {
7689         if (group->generic)
7690                 return devlink_trap_group_generic_verify(group);
7691         else
7692                 return devlink_trap_group_driver_verify(group);
7693 }
7694
7695 static void
7696 devlink_trap_group_notify(struct devlink *devlink,
7697                           const struct devlink_trap_group_item *group_item,
7698                           enum devlink_command cmd)
7699 {
7700         struct sk_buff *msg;
7701         int err;
7702
7703         WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
7704                      cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
7705
7706         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7707         if (!msg)
7708                 return;
7709
7710         err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
7711                                          0);
7712         if (err) {
7713                 nlmsg_free(msg);
7714                 return;
7715         }
7716
7717         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
7718                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
7719 }
7720
7721 static struct devlink_trap_group_item *
7722 devlink_trap_group_item_create(struct devlink *devlink,
7723                                const struct devlink_trap_group *group)
7724 {
7725         struct devlink_trap_group_item *group_item;
7726         int err;
7727
7728         err = devlink_trap_group_verify(group);
7729         if (err)
7730                 return ERR_PTR(err);
7731
7732         group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
7733         if (!group_item)
7734                 return ERR_PTR(-ENOMEM);
7735
7736         group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
7737         if (!group_item->stats) {
7738                 err = -ENOMEM;
7739                 goto err_stats_alloc;
7740         }
7741
7742         group_item->group = group;
7743         refcount_set(&group_item->refcount, 1);
7744
7745         if (devlink->ops->trap_group_init) {
7746                 err = devlink->ops->trap_group_init(devlink, group);
7747                 if (err)
7748                         goto err_group_init;
7749         }
7750
7751         list_add_tail(&group_item->list, &devlink->trap_group_list);
7752         devlink_trap_group_notify(devlink, group_item,
7753                                   DEVLINK_CMD_TRAP_GROUP_NEW);
7754
7755         return group_item;
7756
7757 err_group_init:
7758         free_percpu(group_item->stats);
7759 err_stats_alloc:
7760         kfree(group_item);
7761         return ERR_PTR(err);
7762 }
7763
7764 static void
7765 devlink_trap_group_item_destroy(struct devlink *devlink,
7766                                 struct devlink_trap_group_item *group_item)
7767 {
7768         devlink_trap_group_notify(devlink, group_item,
7769                                   DEVLINK_CMD_TRAP_GROUP_DEL);
7770         list_del(&group_item->list);
7771         free_percpu(group_item->stats);
7772         kfree(group_item);
7773 }
7774
7775 static struct devlink_trap_group_item *
7776 devlink_trap_group_item_get(struct devlink *devlink,
7777                             const struct devlink_trap_group *group)
7778 {
7779         struct devlink_trap_group_item *group_item;
7780
7781         group_item = devlink_trap_group_item_lookup(devlink, group->name);
7782         if (group_item) {
7783                 refcount_inc(&group_item->refcount);
7784                 return group_item;
7785         }
7786
7787         return devlink_trap_group_item_create(devlink, group);
7788 }
7789
7790 static void
7791 devlink_trap_group_item_put(struct devlink *devlink,
7792                             struct devlink_trap_group_item *group_item)
7793 {
7794         if (!refcount_dec_and_test(&group_item->refcount))
7795                 return;
7796
7797         devlink_trap_group_item_destroy(devlink, group_item);
7798 }
7799
7800 static int
7801 devlink_trap_item_group_link(struct devlink *devlink,
7802                              struct devlink_trap_item *trap_item)
7803 {
7804         struct devlink_trap_group_item *group_item;
7805
7806         group_item = devlink_trap_group_item_get(devlink,
7807                                                  &trap_item->trap->group);
7808         if (IS_ERR(group_item))
7809                 return PTR_ERR(group_item);
7810
7811         trap_item->group_item = group_item;
7812
7813         return 0;
7814 }
7815
7816 static void
7817 devlink_trap_item_group_unlink(struct devlink *devlink,
7818                                struct devlink_trap_item *trap_item)
7819 {
7820         devlink_trap_group_item_put(devlink, trap_item->group_item);
7821 }
7822
7823 static void devlink_trap_notify(struct devlink *devlink,
7824                                 const struct devlink_trap_item *trap_item,
7825                                 enum devlink_command cmd)
7826 {
7827         struct sk_buff *msg;
7828         int err;
7829
7830         WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
7831                      cmd != DEVLINK_CMD_TRAP_DEL);
7832
7833         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7834         if (!msg)
7835                 return;
7836
7837         err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
7838         if (err) {
7839                 nlmsg_free(msg);
7840                 return;
7841         }
7842
7843         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
7844                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
7845 }
7846
7847 static int
7848 devlink_trap_register(struct devlink *devlink,
7849                       const struct devlink_trap *trap, void *priv)
7850 {
7851         struct devlink_trap_item *trap_item;
7852         int err;
7853
7854         if (devlink_trap_item_lookup(devlink, trap->name))
7855                 return -EEXIST;
7856
7857         trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
7858         if (!trap_item)
7859                 return -ENOMEM;
7860
7861         trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
7862         if (!trap_item->stats) {
7863                 err = -ENOMEM;
7864                 goto err_stats_alloc;
7865         }
7866
7867         trap_item->trap = trap;
7868         trap_item->action = trap->init_action;
7869         trap_item->priv = priv;
7870
7871         err = devlink_trap_item_group_link(devlink, trap_item);
7872         if (err)
7873                 goto err_group_link;
7874
7875         err = devlink->ops->trap_init(devlink, trap, trap_item);
7876         if (err)
7877                 goto err_trap_init;
7878
7879         list_add_tail(&trap_item->list, &devlink->trap_list);
7880         devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
7881
7882         return 0;
7883
7884 err_trap_init:
7885         devlink_trap_item_group_unlink(devlink, trap_item);
7886 err_group_link:
7887         free_percpu(trap_item->stats);
7888 err_stats_alloc:
7889         kfree(trap_item);
7890         return err;
7891 }
7892
7893 static void devlink_trap_unregister(struct devlink *devlink,
7894                                     const struct devlink_trap *trap)
7895 {
7896         struct devlink_trap_item *trap_item;
7897
7898         trap_item = devlink_trap_item_lookup(devlink, trap->name);
7899         if (WARN_ON_ONCE(!trap_item))
7900                 return;
7901
7902         devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
7903         list_del(&trap_item->list);
7904         if (devlink->ops->trap_fini)
7905                 devlink->ops->trap_fini(devlink, trap, trap_item);
7906         devlink_trap_item_group_unlink(devlink, trap_item);
7907         free_percpu(trap_item->stats);
7908         kfree(trap_item);
7909 }
7910
7911 static void devlink_trap_disable(struct devlink *devlink,
7912                                  const struct devlink_trap *trap)
7913 {
7914         struct devlink_trap_item *trap_item;
7915
7916         trap_item = devlink_trap_item_lookup(devlink, trap->name);
7917         if (WARN_ON_ONCE(!trap_item))
7918                 return;
7919
7920         devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP);
7921         trap_item->action = DEVLINK_TRAP_ACTION_DROP;
7922 }
7923
7924 /**
7925  * devlink_traps_register - Register packet traps with devlink.
7926  * @devlink: devlink.
7927  * @traps: Packet traps.
7928  * @traps_count: Count of provided packet traps.
7929  * @priv: Driver private information.
7930  *
7931  * Return: Non-zero value on failure.
7932  */
7933 int devlink_traps_register(struct devlink *devlink,
7934                            const struct devlink_trap *traps,
7935                            size_t traps_count, void *priv)
7936 {
7937         int i, err;
7938
7939         if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
7940                 return -EINVAL;
7941
7942         mutex_lock(&devlink->lock);
7943         for (i = 0; i < traps_count; i++) {
7944                 const struct devlink_trap *trap = &traps[i];
7945
7946                 err = devlink_trap_verify(trap);
7947                 if (err)
7948                         goto err_trap_verify;
7949
7950                 err = devlink_trap_register(devlink, trap, priv);
7951                 if (err)
7952                         goto err_trap_register;
7953         }
7954         mutex_unlock(&devlink->lock);
7955
7956         return 0;
7957
7958 err_trap_register:
7959 err_trap_verify:
7960         for (i--; i >= 0; i--)
7961                 devlink_trap_unregister(devlink, &traps[i]);
7962         mutex_unlock(&devlink->lock);
7963         return err;
7964 }
7965 EXPORT_SYMBOL_GPL(devlink_traps_register);
7966
7967 /**
7968  * devlink_traps_unregister - Unregister packet traps from devlink.
7969  * @devlink: devlink.
7970  * @traps: Packet traps.
7971  * @traps_count: Count of provided packet traps.
7972  */
7973 void devlink_traps_unregister(struct devlink *devlink,
7974                               const struct devlink_trap *traps,
7975                               size_t traps_count)
7976 {
7977         int i;
7978
7979         mutex_lock(&devlink->lock);
7980         /* Make sure we do not have any packets in-flight while unregistering
7981          * traps by disabling all of them and waiting for a grace period.
7982          */
7983         for (i = traps_count - 1; i >= 0; i--)
7984                 devlink_trap_disable(devlink, &traps[i]);
7985         synchronize_rcu();
7986         for (i = traps_count - 1; i >= 0; i--)
7987                 devlink_trap_unregister(devlink, &traps[i]);
7988         mutex_unlock(&devlink->lock);
7989 }
7990 EXPORT_SYMBOL_GPL(devlink_traps_unregister);
7991
7992 static void
7993 devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
7994                           size_t skb_len)
7995 {
7996         struct devlink_stats *stats;
7997
7998         stats = this_cpu_ptr(trap_stats);
7999         u64_stats_update_begin(&stats->syncp);
8000         stats->rx_bytes += skb_len;
8001         stats->rx_packets++;
8002         u64_stats_update_end(&stats->syncp);
8003 }
8004
8005 static void
8006 devlink_trap_report_metadata_fill(struct net_dm_hw_metadata *hw_metadata,
8007                                   const struct devlink_trap_item *trap_item,
8008                                   struct devlink_port *in_devlink_port)
8009 {
8010         struct devlink_trap_group_item *group_item = trap_item->group_item;
8011
8012         hw_metadata->trap_group_name = group_item->group->name;
8013         hw_metadata->trap_name = trap_item->trap->name;
8014
8015         spin_lock(&in_devlink_port->type_lock);
8016         if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
8017                 hw_metadata->input_dev = in_devlink_port->type_dev;
8018         spin_unlock(&in_devlink_port->type_lock);
8019 }
8020
8021 /**
8022  * devlink_trap_report - Report trapped packet to drop monitor.
8023  * @devlink: devlink.
8024  * @skb: Trapped packet.
8025  * @trap_ctx: Trap context.
8026  * @in_devlink_port: Input devlink port.
8027  */
8028 void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
8029                          void *trap_ctx, struct devlink_port *in_devlink_port)
8030 {
8031         struct devlink_trap_item *trap_item = trap_ctx;
8032         struct net_dm_hw_metadata hw_metadata = {};
8033
8034         devlink_trap_stats_update(trap_item->stats, skb->len);
8035         devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
8036
8037         devlink_trap_report_metadata_fill(&hw_metadata, trap_item,
8038                                           in_devlink_port);
8039         net_dm_hw_report(skb, &hw_metadata);
8040 }
8041 EXPORT_SYMBOL_GPL(devlink_trap_report);
8042
8043 /**
8044  * devlink_trap_ctx_priv - Trap context to driver private information.
8045  * @trap_ctx: Trap context.
8046  *
8047  * Return: Driver private information passed during registration.
8048  */
8049 void *devlink_trap_ctx_priv(void *trap_ctx)
8050 {
8051         struct devlink_trap_item *trap_item = trap_ctx;
8052
8053         return trap_item->priv;
8054 }
8055 EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
8056
8057 static void __devlink_compat_running_version(struct devlink *devlink,
8058                                              char *buf, size_t len)
8059 {
8060         const struct nlattr *nlattr;
8061         struct devlink_info_req req;
8062         struct sk_buff *msg;
8063         int rem, err;
8064
8065         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8066         if (!msg)
8067                 return;
8068
8069         req.msg = msg;
8070         err = devlink->ops->info_get(devlink, &req, NULL);
8071         if (err)
8072                 goto free_msg;
8073
8074         nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
8075                 const struct nlattr *kv;
8076                 int rem_kv;
8077
8078                 if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
8079                         continue;
8080
8081                 nla_for_each_nested(kv, nlattr, rem_kv) {
8082                         if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
8083                                 continue;
8084
8085                         strlcat(buf, nla_data(kv), len);
8086                         strlcat(buf, " ", len);
8087                 }
8088         }
8089 free_msg:
8090         nlmsg_free(msg);
8091 }
8092
8093 void devlink_compat_running_version(struct net_device *dev,
8094                                     char *buf, size_t len)
8095 {
8096         struct devlink *devlink;
8097
8098         dev_hold(dev);
8099         rtnl_unlock();
8100
8101         devlink = netdev_to_devlink(dev);
8102         if (!devlink || !devlink->ops->info_get)
8103                 goto out;
8104
8105         mutex_lock(&devlink->lock);
8106         __devlink_compat_running_version(devlink, buf, len);
8107         mutex_unlock(&devlink->lock);
8108
8109 out:
8110         rtnl_lock();
8111         dev_put(dev);
8112 }
8113
8114 int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
8115 {
8116         struct devlink *devlink;
8117         int ret;
8118
8119         dev_hold(dev);
8120         rtnl_unlock();
8121
8122         devlink = netdev_to_devlink(dev);
8123         if (!devlink || !devlink->ops->flash_update) {
8124                 ret = -EOPNOTSUPP;
8125                 goto out;
8126         }
8127
8128         mutex_lock(&devlink->lock);
8129         ret = devlink->ops->flash_update(devlink, file_name, NULL, NULL);
8130         mutex_unlock(&devlink->lock);
8131
8132 out:
8133         rtnl_lock();
8134         dev_put(dev);
8135
8136         return ret;
8137 }
8138
8139 int devlink_compat_phys_port_name_get(struct net_device *dev,
8140                                       char *name, size_t len)
8141 {
8142         struct devlink_port *devlink_port;
8143
8144         /* RTNL mutex is held here which ensures that devlink_port
8145          * instance cannot disappear in the middle. No need to take
8146          * any devlink lock as only permanent values are accessed.
8147          */
8148         ASSERT_RTNL();
8149
8150         devlink_port = netdev_to_devlink_port(dev);
8151         if (!devlink_port)
8152                 return -EOPNOTSUPP;
8153
8154         return __devlink_port_phys_port_name_get(devlink_port, name, len);
8155 }
8156
8157 int devlink_compat_switch_id_get(struct net_device *dev,
8158                                  struct netdev_phys_item_id *ppid)
8159 {
8160         struct devlink_port *devlink_port;
8161
8162         /* Caller must hold RTNL mutex or reference to dev, which ensures that
8163          * devlink_port instance cannot disappear in the middle. No need to take
8164          * any devlink lock as only permanent values are accessed.
8165          */
8166         devlink_port = netdev_to_devlink_port(dev);
8167         if (!devlink_port || !devlink_port->attrs.switch_port)
8168                 return -EOPNOTSUPP;
8169
8170         memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
8171
8172         return 0;
8173 }
8174
8175 static void __net_exit devlink_pernet_pre_exit(struct net *net)
8176 {
8177         struct devlink *devlink;
8178         int err;
8179
8180         /* In case network namespace is getting destroyed, reload
8181          * all devlink instances from this namespace into init_net.
8182          */
8183         mutex_lock(&devlink_mutex);
8184         list_for_each_entry(devlink, &devlink_list, list) {
8185                 if (net_eq(devlink_net(devlink), net)) {
8186                         if (WARN_ON(!devlink_reload_supported(devlink)))
8187                                 continue;
8188                         err = devlink_reload(devlink, &init_net, NULL);
8189                         if (err)
8190                                 pr_warn("Failed to reload devlink instance into init_net\n");
8191                 }
8192         }
8193         mutex_unlock(&devlink_mutex);
8194 }
8195
8196 static struct pernet_operations devlink_pernet_ops __net_initdata = {
8197         .pre_exit = devlink_pernet_pre_exit,
8198 };
8199
8200 static int __init devlink_init(void)
8201 {
8202         int err;
8203
8204         err = genl_register_family(&devlink_nl_family);
8205         if (err)
8206                 goto out;
8207         err = register_pernet_subsys(&devlink_pernet_ops);
8208
8209 out:
8210         WARN_ON(err);
8211         return err;
8212 }
8213
8214 subsys_initcall(devlink_init);