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 <[email protected]>
   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, struct devlink *devlink)
2107 {
2108         struct devlink_dpipe_table *table;
2109         list_for_each_entry_rcu(table, dpipe_tables, list,
2110                                 lockdep_is_held(&devlink->lock)) {
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, devlink);
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, devlink);
2386         if (!table)
2387                 return -EINVAL;
2388
2389         if (table->counter_control_extern)
2390                 return -EOPNOTSUPP;
2391
2392         if (!(table->counters_enabled ^ enable))
2393                 return 0;
2394
2395         table->counters_enabled = enable;
2396         if (table->table_ops->counters_set_update)
2397                 table->table_ops->counters_set_update(table->priv, enable);
2398         return 0;
2399 }
2400
2401 static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
2402                                                    struct genl_info *info)
2403 {
2404         struct devlink *devlink = info->user_ptr[0];
2405         const char *table_name;
2406         bool counters_enable;
2407
2408         if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] ||
2409             !info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED])
2410                 return -EINVAL;
2411
2412         table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2413         counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
2414
2415         return devlink_dpipe_table_counters_set(devlink, table_name,
2416                                                 counters_enable);
2417 }
2418
2419 static struct devlink_resource *
2420 devlink_resource_find(struct devlink *devlink,
2421                       struct devlink_resource *resource, u64 resource_id)
2422 {
2423         struct list_head *resource_list;
2424
2425         if (resource)
2426                 resource_list = &resource->resource_list;
2427         else
2428                 resource_list = &devlink->resource_list;
2429
2430         list_for_each_entry(resource, resource_list, list) {
2431                 struct devlink_resource *child_resource;
2432
2433                 if (resource->id == resource_id)
2434                         return resource;
2435
2436                 child_resource = devlink_resource_find(devlink, resource,
2437                                                        resource_id);
2438                 if (child_resource)
2439                         return child_resource;
2440         }
2441         return NULL;
2442 }
2443
2444 static void
2445 devlink_resource_validate_children(struct devlink_resource *resource)
2446 {
2447         struct devlink_resource *child_resource;
2448         bool size_valid = true;
2449         u64 parts_size = 0;
2450
2451         if (list_empty(&resource->resource_list))
2452                 goto out;
2453
2454         list_for_each_entry(child_resource, &resource->resource_list, list)
2455                 parts_size += child_resource->size_new;
2456
2457         if (parts_size > resource->size_new)
2458                 size_valid = false;
2459 out:
2460         resource->size_valid = size_valid;
2461 }
2462
2463 static int
2464 devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
2465                                struct netlink_ext_ack *extack)
2466 {
2467         u64 reminder;
2468         int err = 0;
2469
2470         if (size > resource->size_params.size_max) {
2471                 NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum");
2472                 err = -EINVAL;
2473         }
2474
2475         if (size < resource->size_params.size_min) {
2476                 NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum");
2477                 err = -EINVAL;
2478         }
2479
2480         div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
2481         if (reminder) {
2482                 NL_SET_ERR_MSG_MOD(extack, "Wrong granularity");
2483                 err = -EINVAL;
2484         }
2485
2486         return err;
2487 }
2488
2489 static int devlink_nl_cmd_resource_set(struct sk_buff *skb,
2490                                        struct genl_info *info)
2491 {
2492         struct devlink *devlink = info->user_ptr[0];
2493         struct devlink_resource *resource;
2494         u64 resource_id;
2495         u64 size;
2496         int err;
2497
2498         if (!info->attrs[DEVLINK_ATTR_RESOURCE_ID] ||
2499             !info->attrs[DEVLINK_ATTR_RESOURCE_SIZE])
2500                 return -EINVAL;
2501         resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);
2502
2503         resource = devlink_resource_find(devlink, NULL, resource_id);
2504         if (!resource)
2505                 return -EINVAL;
2506
2507         size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);
2508         err = devlink_resource_validate_size(resource, size, info->extack);
2509         if (err)
2510                 return err;
2511
2512         resource->size_new = size;
2513         devlink_resource_validate_children(resource);
2514         if (resource->parent)
2515                 devlink_resource_validate_children(resource->parent);
2516         return 0;
2517 }
2518
2519 static int
2520 devlink_resource_size_params_put(struct devlink_resource *resource,
2521                                  struct sk_buff *skb)
2522 {
2523         struct devlink_resource_size_params *size_params;
2524
2525         size_params = &resource->size_params;
2526         if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN,
2527                               size_params->size_granularity, DEVLINK_ATTR_PAD) ||
2528             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX,
2529                               size_params->size_max, DEVLINK_ATTR_PAD) ||
2530             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN,
2531                               size_params->size_min, DEVLINK_ATTR_PAD) ||
2532             nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))
2533                 return -EMSGSIZE;
2534         return 0;
2535 }
2536
2537 static int devlink_resource_occ_put(struct devlink_resource *resource,
2538                                     struct sk_buff *skb)
2539 {
2540         if (!resource->occ_get)
2541                 return 0;
2542         return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC,
2543                                  resource->occ_get(resource->occ_get_priv),
2544                                  DEVLINK_ATTR_PAD);
2545 }
2546
2547 static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
2548                                 struct devlink_resource *resource)
2549 {
2550         struct devlink_resource *child_resource;
2551         struct nlattr *child_resource_attr;
2552         struct nlattr *resource_attr;
2553
2554         resource_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE);
2555         if (!resource_attr)
2556                 return -EMSGSIZE;
2557
2558         if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
2559             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,
2560                               DEVLINK_ATTR_PAD) ||
2561             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,
2562                               DEVLINK_ATTR_PAD))
2563                 goto nla_put_failure;
2564         if (resource->size != resource->size_new)
2565                 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW,
2566                                   resource->size_new, DEVLINK_ATTR_PAD);
2567         if (devlink_resource_occ_put(resource, skb))
2568                 goto nla_put_failure;
2569         if (devlink_resource_size_params_put(resource, skb))
2570                 goto nla_put_failure;
2571         if (list_empty(&resource->resource_list))
2572                 goto out;
2573
2574         if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID,
2575                        resource->size_valid))
2576                 goto nla_put_failure;
2577
2578         child_resource_attr = nla_nest_start_noflag(skb,
2579                                                     DEVLINK_ATTR_RESOURCE_LIST);
2580         if (!child_resource_attr)
2581                 goto nla_put_failure;
2582
2583         list_for_each_entry(child_resource, &resource->resource_list, list) {
2584                 if (devlink_resource_put(devlink, skb, child_resource))
2585                         goto resource_put_failure;
2586         }
2587
2588         nla_nest_end(skb, child_resource_attr);
2589 out:
2590         nla_nest_end(skb, resource_attr);
2591         return 0;
2592
2593 resource_put_failure:
2594         nla_nest_cancel(skb, child_resource_attr);
2595 nla_put_failure:
2596         nla_nest_cancel(skb, resource_attr);
2597         return -EMSGSIZE;
2598 }
2599
2600 static int devlink_resource_fill(struct genl_info *info,
2601                                  enum devlink_command cmd, int flags)
2602 {
2603         struct devlink *devlink = info->user_ptr[0];
2604         struct devlink_resource *resource;
2605         struct nlattr *resources_attr;
2606         struct sk_buff *skb = NULL;
2607         struct nlmsghdr *nlh;
2608         bool incomplete;
2609         void *hdr;
2610         int i;
2611         int err;
2612
2613         resource = list_first_entry(&devlink->resource_list,
2614                                     struct devlink_resource, list);
2615 start_again:
2616         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2617         if (err)
2618                 return err;
2619
2620         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2621                           &devlink_nl_family, NLM_F_MULTI, cmd);
2622         if (!hdr) {
2623                 nlmsg_free(skb);
2624                 return -EMSGSIZE;
2625         }
2626
2627         if (devlink_nl_put_handle(skb, devlink))
2628                 goto nla_put_failure;
2629
2630         resources_attr = nla_nest_start_noflag(skb,
2631                                                DEVLINK_ATTR_RESOURCE_LIST);
2632         if (!resources_attr)
2633                 goto nla_put_failure;
2634
2635         incomplete = false;
2636         i = 0;
2637         list_for_each_entry_from(resource, &devlink->resource_list, list) {
2638                 err = devlink_resource_put(devlink, skb, resource);
2639                 if (err) {
2640                         if (!i)
2641                                 goto err_resource_put;
2642                         incomplete = true;
2643                         break;
2644                 }
2645                 i++;
2646         }
2647         nla_nest_end(skb, resources_attr);
2648         genlmsg_end(skb, hdr);
2649         if (incomplete)
2650                 goto start_again;
2651 send_done:
2652         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2653                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2654         if (!nlh) {
2655                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2656                 if (err)
2657                         return err;
2658                 goto send_done;
2659         }
2660         return genlmsg_reply(skb, info);
2661
2662 nla_put_failure:
2663         err = -EMSGSIZE;
2664 err_resource_put:
2665         nlmsg_free(skb);
2666         return err;
2667 }
2668
2669 static int devlink_nl_cmd_resource_dump(struct sk_buff *skb,
2670                                         struct genl_info *info)
2671 {
2672         struct devlink *devlink = info->user_ptr[0];
2673
2674         if (list_empty(&devlink->resource_list))
2675                 return -EOPNOTSUPP;
2676
2677         return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
2678 }
2679
2680 static int
2681 devlink_resources_validate(struct devlink *devlink,
2682                            struct devlink_resource *resource,
2683                            struct genl_info *info)
2684 {
2685         struct list_head *resource_list;
2686         int err = 0;
2687
2688         if (resource)
2689                 resource_list = &resource->resource_list;
2690         else
2691                 resource_list = &devlink->resource_list;
2692
2693         list_for_each_entry(resource, resource_list, list) {
2694                 if (!resource->size_valid)
2695                         return -EINVAL;
2696                 err = devlink_resources_validate(devlink, resource, info);
2697                 if (err)
2698                         return err;
2699         }
2700         return err;
2701 }
2702
2703 static struct net *devlink_netns_get(struct sk_buff *skb,
2704                                      struct genl_info *info)
2705 {
2706         struct nlattr *netns_pid_attr = info->attrs[DEVLINK_ATTR_NETNS_PID];
2707         struct nlattr *netns_fd_attr = info->attrs[DEVLINK_ATTR_NETNS_FD];
2708         struct nlattr *netns_id_attr = info->attrs[DEVLINK_ATTR_NETNS_ID];
2709         struct net *net;
2710
2711         if (!!netns_pid_attr + !!netns_fd_attr + !!netns_id_attr > 1) {
2712                 NL_SET_ERR_MSG(info->extack, "multiple netns identifying attributes specified");
2713                 return ERR_PTR(-EINVAL);
2714         }
2715
2716         if (netns_pid_attr) {
2717                 net = get_net_ns_by_pid(nla_get_u32(netns_pid_attr));
2718         } else if (netns_fd_attr) {
2719                 net = get_net_ns_by_fd(nla_get_u32(netns_fd_attr));
2720         } else if (netns_id_attr) {
2721                 net = get_net_ns_by_id(sock_net(skb->sk),
2722                                        nla_get_u32(netns_id_attr));
2723                 if (!net)
2724                         net = ERR_PTR(-EINVAL);
2725         } else {
2726                 WARN_ON(1);
2727                 net = ERR_PTR(-EINVAL);
2728         }
2729         if (IS_ERR(net)) {
2730                 NL_SET_ERR_MSG(info->extack, "Unknown network namespace");
2731                 return ERR_PTR(-EINVAL);
2732         }
2733         if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
2734                 put_net(net);
2735                 return ERR_PTR(-EPERM);
2736         }
2737         return net;
2738 }
2739
2740 static void devlink_param_notify(struct devlink *devlink,
2741                                  unsigned int port_index,
2742                                  struct devlink_param_item *param_item,
2743                                  enum devlink_command cmd);
2744
2745 static void devlink_reload_netns_change(struct devlink *devlink,
2746                                         struct net *dest_net)
2747 {
2748         struct devlink_param_item *param_item;
2749
2750         /* Userspace needs to be notified about devlink objects
2751          * removed from original and entering new network namespace.
2752          * The rest of the devlink objects are re-created during
2753          * reload process so the notifications are generated separatelly.
2754          */
2755
2756         list_for_each_entry(param_item, &devlink->param_list, list)
2757                 devlink_param_notify(devlink, 0, param_item,
2758                                      DEVLINK_CMD_PARAM_DEL);
2759         devlink_notify(devlink, DEVLINK_CMD_DEL);
2760
2761         __devlink_net_set(devlink, dest_net);
2762
2763         devlink_notify(devlink, DEVLINK_CMD_NEW);
2764         list_for_each_entry(param_item, &devlink->param_list, list)
2765                 devlink_param_notify(devlink, 0, param_item,
2766                                      DEVLINK_CMD_PARAM_NEW);
2767 }
2768
2769 static bool devlink_reload_supported(struct devlink *devlink)
2770 {
2771         return devlink->ops->reload_down && devlink->ops->reload_up;
2772 }
2773
2774 static void devlink_reload_failed_set(struct devlink *devlink,
2775                                       bool reload_failed)
2776 {
2777         if (devlink->reload_failed == reload_failed)
2778                 return;
2779         devlink->reload_failed = reload_failed;
2780         devlink_notify(devlink, DEVLINK_CMD_NEW);
2781 }
2782
2783 bool devlink_is_reload_failed(const struct devlink *devlink)
2784 {
2785         return devlink->reload_failed;
2786 }
2787 EXPORT_SYMBOL_GPL(devlink_is_reload_failed);
2788
2789 static int devlink_reload(struct devlink *devlink, struct net *dest_net,
2790                           struct netlink_ext_ack *extack)
2791 {
2792         int err;
2793
2794         if (!devlink->reload_enabled)
2795                 return -EOPNOTSUPP;
2796
2797         err = devlink->ops->reload_down(devlink, !!dest_net, extack);
2798         if (err)
2799                 return err;
2800
2801         if (dest_net && !net_eq(dest_net, devlink_net(devlink)))
2802                 devlink_reload_netns_change(devlink, dest_net);
2803
2804         err = devlink->ops->reload_up(devlink, extack);
2805         devlink_reload_failed_set(devlink, !!err);
2806         return err;
2807 }
2808
2809 static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
2810 {
2811         struct devlink *devlink = info->user_ptr[0];
2812         struct net *dest_net = NULL;
2813         int err;
2814
2815         if (!devlink_reload_supported(devlink) || !devlink->reload_enabled)
2816                 return -EOPNOTSUPP;
2817
2818         err = devlink_resources_validate(devlink, NULL, info);
2819         if (err) {
2820                 NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed");
2821                 return err;
2822         }
2823
2824         if (info->attrs[DEVLINK_ATTR_NETNS_PID] ||
2825             info->attrs[DEVLINK_ATTR_NETNS_FD] ||
2826             info->attrs[DEVLINK_ATTR_NETNS_ID]) {
2827                 dest_net = devlink_netns_get(skb, info);
2828                 if (IS_ERR(dest_net))
2829                         return PTR_ERR(dest_net);
2830         }
2831
2832         err = devlink_reload(devlink, dest_net, info->extack);
2833
2834         if (dest_net)
2835                 put_net(dest_net);
2836
2837         return err;
2838 }
2839
2840 static int devlink_nl_flash_update_fill(struct sk_buff *msg,
2841                                         struct devlink *devlink,
2842                                         enum devlink_command cmd,
2843                                         const char *status_msg,
2844                                         const char *component,
2845                                         unsigned long done, unsigned long total)
2846 {
2847         void *hdr;
2848
2849         hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
2850         if (!hdr)
2851                 return -EMSGSIZE;
2852
2853         if (devlink_nl_put_handle(msg, devlink))
2854                 goto nla_put_failure;
2855
2856         if (cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS)
2857                 goto out;
2858
2859         if (status_msg &&
2860             nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_MSG,
2861                            status_msg))
2862                 goto nla_put_failure;
2863         if (component &&
2864             nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_COMPONENT,
2865                            component))
2866                 goto nla_put_failure;
2867         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE,
2868                               done, DEVLINK_ATTR_PAD))
2869                 goto nla_put_failure;
2870         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL,
2871                               total, DEVLINK_ATTR_PAD))
2872                 goto nla_put_failure;
2873
2874 out:
2875         genlmsg_end(msg, hdr);
2876         return 0;
2877
2878 nla_put_failure:
2879         genlmsg_cancel(msg, hdr);
2880         return -EMSGSIZE;
2881 }
2882
2883 static void __devlink_flash_update_notify(struct devlink *devlink,
2884                                           enum devlink_command cmd,
2885                                           const char *status_msg,
2886                                           const char *component,
2887                                           unsigned long done,
2888                                           unsigned long total)
2889 {
2890         struct sk_buff *msg;
2891         int err;
2892
2893         WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE &&
2894                 cmd != DEVLINK_CMD_FLASH_UPDATE_END &&
2895                 cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS);
2896
2897         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2898         if (!msg)
2899                 return;
2900
2901         err = devlink_nl_flash_update_fill(msg, devlink, cmd, status_msg,
2902                                            component, done, total);
2903         if (err)
2904                 goto out_free_msg;
2905
2906         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
2907                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
2908         return;
2909
2910 out_free_msg:
2911         nlmsg_free(msg);
2912 }
2913
2914 void devlink_flash_update_begin_notify(struct devlink *devlink)
2915 {
2916         __devlink_flash_update_notify(devlink,
2917                                       DEVLINK_CMD_FLASH_UPDATE,
2918                                       NULL, NULL, 0, 0);
2919 }
2920 EXPORT_SYMBOL_GPL(devlink_flash_update_begin_notify);
2921
2922 void devlink_flash_update_end_notify(struct devlink *devlink)
2923 {
2924         __devlink_flash_update_notify(devlink,
2925                                       DEVLINK_CMD_FLASH_UPDATE_END,
2926                                       NULL, NULL, 0, 0);
2927 }
2928 EXPORT_SYMBOL_GPL(devlink_flash_update_end_notify);
2929
2930 void devlink_flash_update_status_notify(struct devlink *devlink,
2931                                         const char *status_msg,
2932                                         const char *component,
2933                                         unsigned long done,
2934                                         unsigned long total)
2935 {
2936         __devlink_flash_update_notify(devlink,
2937                                       DEVLINK_CMD_FLASH_UPDATE_STATUS,
2938                                       status_msg, component, done, total);
2939 }
2940 EXPORT_SYMBOL_GPL(devlink_flash_update_status_notify);
2941
2942 static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
2943                                        struct genl_info *info)
2944 {
2945         struct devlink *devlink = info->user_ptr[0];
2946         const char *file_name, *component;
2947         struct nlattr *nla_component;
2948
2949         if (!devlink->ops->flash_update)
2950                 return -EOPNOTSUPP;
2951
2952         if (!info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME])
2953                 return -EINVAL;
2954         file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]);
2955
2956         nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT];
2957         component = nla_component ? nla_data(nla_component) : NULL;
2958
2959         return devlink->ops->flash_update(devlink, file_name, component,
2960                                           info->extack);
2961 }
2962
2963 static const struct devlink_param devlink_param_generic[] = {
2964         {
2965                 .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
2966                 .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME,
2967                 .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE,
2968         },
2969         {
2970                 .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
2971                 .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME,
2972                 .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE,
2973         },
2974         {
2975                 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
2976                 .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME,
2977                 .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE,
2978         },
2979         {
2980                 .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
2981                 .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
2982                 .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
2983         },
2984         {
2985                 .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
2986                 .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME,
2987                 .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE,
2988         },
2989         {
2990                 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
2991                 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME,
2992                 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE,
2993         },
2994         {
2995                 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
2996                 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME,
2997                 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE,
2998         },
2999         {
3000                 .id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
3001                 .name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME,
3002                 .type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE,
3003         },
3004         {
3005                 .id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE,
3006                 .name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME,
3007                 .type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE,
3008         },
3009         {
3010                 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE,
3011                 .name = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_NAME,
3012                 .type = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_TYPE,
3013         },
3014 };
3015
3016 static int devlink_param_generic_verify(const struct devlink_param *param)
3017 {
3018         /* verify it match generic parameter by id and name */
3019         if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
3020                 return -EINVAL;
3021         if (strcmp(param->name, devlink_param_generic[param->id].name))
3022                 return -ENOENT;
3023
3024         WARN_ON(param->type != devlink_param_generic[param->id].type);
3025
3026         return 0;
3027 }
3028
3029 static int devlink_param_driver_verify(const struct devlink_param *param)
3030 {
3031         int i;
3032
3033         if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
3034                 return -EINVAL;
3035         /* verify no such name in generic params */
3036         for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
3037                 if (!strcmp(param->name, devlink_param_generic[i].name))
3038                         return -EEXIST;
3039
3040         return 0;
3041 }
3042
3043 static struct devlink_param_item *
3044 devlink_param_find_by_name(struct list_head *param_list,
3045                            const char *param_name)
3046 {
3047         struct devlink_param_item *param_item;
3048
3049         list_for_each_entry(param_item, param_list, list)
3050                 if (!strcmp(param_item->param->name, param_name))
3051                         return param_item;
3052         return NULL;
3053 }
3054
3055 static struct devlink_param_item *
3056 devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
3057 {
3058         struct devlink_param_item *param_item;
3059
3060         list_for_each_entry(param_item, param_list, list)
3061                 if (param_item->param->id == param_id)
3062                         return param_item;
3063         return NULL;
3064 }
3065
3066 static bool
3067 devlink_param_cmode_is_supported(const struct devlink_param *param,
3068                                  enum devlink_param_cmode cmode)
3069 {
3070         return test_bit(cmode, &param->supported_cmodes);
3071 }
3072
3073 static int devlink_param_get(struct devlink *devlink,
3074                              const struct devlink_param *param,
3075                              struct devlink_param_gset_ctx *ctx)
3076 {
3077         if (!param->get)
3078                 return -EOPNOTSUPP;
3079         return param->get(devlink, param->id, ctx);
3080 }
3081
3082 static int devlink_param_set(struct devlink *devlink,
3083                              const struct devlink_param *param,
3084                              struct devlink_param_gset_ctx *ctx)
3085 {
3086         if (!param->set)
3087                 return -EOPNOTSUPP;
3088         return param->set(devlink, param->id, ctx);
3089 }
3090
3091 static int
3092 devlink_param_type_to_nla_type(enum devlink_param_type param_type)
3093 {
3094         switch (param_type) {
3095         case DEVLINK_PARAM_TYPE_U8:
3096                 return NLA_U8;
3097         case DEVLINK_PARAM_TYPE_U16:
3098                 return NLA_U16;
3099         case DEVLINK_PARAM_TYPE_U32:
3100                 return NLA_U32;
3101         case DEVLINK_PARAM_TYPE_STRING:
3102                 return NLA_STRING;
3103         case DEVLINK_PARAM_TYPE_BOOL:
3104                 return NLA_FLAG;
3105         default:
3106                 return -EINVAL;
3107         }
3108 }
3109
3110 static int
3111 devlink_nl_param_value_fill_one(struct sk_buff *msg,
3112                                 enum devlink_param_type type,
3113                                 enum devlink_param_cmode cmode,
3114                                 union devlink_param_value val)
3115 {
3116         struct nlattr *param_value_attr;
3117
3118         param_value_attr = nla_nest_start_noflag(msg,
3119                                                  DEVLINK_ATTR_PARAM_VALUE);
3120         if (!param_value_attr)
3121                 goto nla_put_failure;
3122
3123         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
3124                 goto value_nest_cancel;
3125
3126         switch (type) {
3127         case DEVLINK_PARAM_TYPE_U8:
3128                 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
3129                         goto value_nest_cancel;
3130                 break;
3131         case DEVLINK_PARAM_TYPE_U16:
3132                 if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
3133                         goto value_nest_cancel;
3134                 break;
3135         case DEVLINK_PARAM_TYPE_U32:
3136                 if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
3137                         goto value_nest_cancel;
3138                 break;
3139         case DEVLINK_PARAM_TYPE_STRING:
3140                 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
3141                                    val.vstr))
3142                         goto value_nest_cancel;
3143                 break;
3144         case DEVLINK_PARAM_TYPE_BOOL:
3145                 if (val.vbool &&
3146                     nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
3147                         goto value_nest_cancel;
3148                 break;
3149         }
3150
3151         nla_nest_end(msg, param_value_attr);
3152         return 0;
3153
3154 value_nest_cancel:
3155         nla_nest_cancel(msg, param_value_attr);
3156 nla_put_failure:
3157         return -EMSGSIZE;
3158 }
3159
3160 static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
3161                                  unsigned int port_index,
3162                                  struct devlink_param_item *param_item,
3163                                  enum devlink_command cmd,
3164                                  u32 portid, u32 seq, int flags)
3165 {
3166         union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
3167         bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {};
3168         const struct devlink_param *param = param_item->param;
3169         struct devlink_param_gset_ctx ctx;
3170         struct nlattr *param_values_list;
3171         struct nlattr *param_attr;
3172         int nla_type;
3173         void *hdr;
3174         int err;
3175         int i;
3176
3177         /* Get value from driver part to driverinit configuration mode */
3178         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3179                 if (!devlink_param_cmode_is_supported(param, i))
3180                         continue;
3181                 if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3182                         if (!param_item->driverinit_value_valid)
3183                                 return -EOPNOTSUPP;
3184                         param_value[i] = param_item->driverinit_value;
3185                 } else {
3186                         if (!param_item->published)
3187                                 continue;
3188                         ctx.cmode = i;
3189                         err = devlink_param_get(devlink, param, &ctx);
3190                         if (err)
3191                                 return err;
3192                         param_value[i] = ctx.val;
3193                 }
3194                 param_value_set[i] = true;
3195         }
3196
3197         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3198         if (!hdr)
3199                 return -EMSGSIZE;
3200
3201         if (devlink_nl_put_handle(msg, devlink))
3202                 goto genlmsg_cancel;
3203
3204         if (cmd == DEVLINK_CMD_PORT_PARAM_GET ||
3205             cmd == DEVLINK_CMD_PORT_PARAM_NEW ||
3206             cmd == DEVLINK_CMD_PORT_PARAM_DEL)
3207                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index))
3208                         goto genlmsg_cancel;
3209
3210         param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM);
3211         if (!param_attr)
3212                 goto genlmsg_cancel;
3213         if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
3214                 goto param_nest_cancel;
3215         if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
3216                 goto param_nest_cancel;
3217
3218         nla_type = devlink_param_type_to_nla_type(param->type);
3219         if (nla_type < 0)
3220                 goto param_nest_cancel;
3221         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
3222                 goto param_nest_cancel;
3223
3224         param_values_list = nla_nest_start_noflag(msg,
3225                                                   DEVLINK_ATTR_PARAM_VALUES_LIST);
3226         if (!param_values_list)
3227                 goto param_nest_cancel;
3228
3229         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3230                 if (!param_value_set[i])
3231                         continue;
3232                 err = devlink_nl_param_value_fill_one(msg, param->type,
3233                                                       i, param_value[i]);
3234                 if (err)
3235                         goto values_list_nest_cancel;
3236         }
3237
3238         nla_nest_end(msg, param_values_list);
3239         nla_nest_end(msg, param_attr);
3240         genlmsg_end(msg, hdr);
3241         return 0;
3242
3243 values_list_nest_cancel:
3244         nla_nest_end(msg, param_values_list);
3245 param_nest_cancel:
3246         nla_nest_cancel(msg, param_attr);
3247 genlmsg_cancel:
3248         genlmsg_cancel(msg, hdr);
3249         return -EMSGSIZE;
3250 }
3251
3252 static void devlink_param_notify(struct devlink *devlink,
3253                                  unsigned int port_index,
3254                                  struct devlink_param_item *param_item,
3255                                  enum devlink_command cmd)
3256 {
3257         struct sk_buff *msg;
3258         int err;
3259
3260         WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL &&
3261                 cmd != DEVLINK_CMD_PORT_PARAM_NEW &&
3262                 cmd != DEVLINK_CMD_PORT_PARAM_DEL);
3263
3264         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3265         if (!msg)
3266                 return;
3267         err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd,
3268                                     0, 0, 0);
3269         if (err) {
3270                 nlmsg_free(msg);
3271                 return;
3272         }
3273
3274         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3275                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3276 }
3277
3278 static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
3279                                            struct netlink_callback *cb)
3280 {
3281         struct devlink_param_item *param_item;
3282         struct devlink *devlink;
3283         int start = cb->args[0];
3284         int idx = 0;
3285         int err = 0;
3286
3287         mutex_lock(&devlink_mutex);
3288         list_for_each_entry(devlink, &devlink_list, list) {
3289                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3290                         continue;
3291                 mutex_lock(&devlink->lock);
3292                 list_for_each_entry(param_item, &devlink->param_list, list) {
3293                         if (idx < start) {
3294                                 idx++;
3295                                 continue;
3296                         }
3297                         err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3298                                                     DEVLINK_CMD_PARAM_GET,
3299                                                     NETLINK_CB(cb->skb).portid,
3300                                                     cb->nlh->nlmsg_seq,
3301                                                     NLM_F_MULTI);
3302                         if (err && err != -EOPNOTSUPP) {
3303                                 mutex_unlock(&devlink->lock);
3304                                 goto out;
3305                         }
3306                         idx++;
3307                 }
3308                 mutex_unlock(&devlink->lock);
3309         }
3310 out:
3311         mutex_unlock(&devlink_mutex);
3312
3313         if (err != -EMSGSIZE)
3314                 return err;
3315
3316         cb->args[0] = idx;
3317         return msg->len;
3318 }
3319
3320 static int
3321 devlink_param_type_get_from_info(struct genl_info *info,
3322                                  enum devlink_param_type *param_type)
3323 {
3324         if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE])
3325                 return -EINVAL;
3326
3327         switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
3328         case NLA_U8:
3329                 *param_type = DEVLINK_PARAM_TYPE_U8;
3330                 break;
3331         case NLA_U16:
3332                 *param_type = DEVLINK_PARAM_TYPE_U16;
3333                 break;
3334         case NLA_U32:
3335                 *param_type = DEVLINK_PARAM_TYPE_U32;
3336                 break;
3337         case NLA_STRING:
3338                 *param_type = DEVLINK_PARAM_TYPE_STRING;
3339                 break;
3340         case NLA_FLAG:
3341                 *param_type = DEVLINK_PARAM_TYPE_BOOL;
3342                 break;
3343         default:
3344                 return -EINVAL;
3345         }
3346
3347         return 0;
3348 }
3349
3350 static int
3351 devlink_param_value_get_from_info(const struct devlink_param *param,
3352                                   struct genl_info *info,
3353                                   union devlink_param_value *value)
3354 {
3355         struct nlattr *param_data;
3356         int len;
3357
3358         param_data = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA];
3359
3360         if (param->type != DEVLINK_PARAM_TYPE_BOOL && !param_data)
3361                 return -EINVAL;
3362
3363         switch (param->type) {
3364         case DEVLINK_PARAM_TYPE_U8:
3365                 if (nla_len(param_data) != sizeof(u8))
3366                         return -EINVAL;
3367                 value->vu8 = nla_get_u8(param_data);
3368                 break;
3369         case DEVLINK_PARAM_TYPE_U16:
3370                 if (nla_len(param_data) != sizeof(u16))
3371                         return -EINVAL;
3372                 value->vu16 = nla_get_u16(param_data);
3373                 break;
3374         case DEVLINK_PARAM_TYPE_U32:
3375                 if (nla_len(param_data) != sizeof(u32))
3376                         return -EINVAL;
3377                 value->vu32 = nla_get_u32(param_data);
3378                 break;
3379         case DEVLINK_PARAM_TYPE_STRING:
3380                 len = strnlen(nla_data(param_data), nla_len(param_data));
3381                 if (len == nla_len(param_data) ||
3382                     len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
3383                         return -EINVAL;
3384                 strcpy(value->vstr, nla_data(param_data));
3385                 break;
3386         case DEVLINK_PARAM_TYPE_BOOL:
3387                 if (param_data && nla_len(param_data))
3388                         return -EINVAL;
3389                 value->vbool = nla_get_flag(param_data);
3390                 break;
3391         }
3392         return 0;
3393 }
3394
3395 static struct devlink_param_item *
3396 devlink_param_get_from_info(struct list_head *param_list,
3397                             struct genl_info *info)
3398 {
3399         char *param_name;
3400
3401         if (!info->attrs[DEVLINK_ATTR_PARAM_NAME])
3402                 return NULL;
3403
3404         param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
3405         return devlink_param_find_by_name(param_list, param_name);
3406 }
3407
3408 static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
3409                                          struct genl_info *info)
3410 {
3411         struct devlink *devlink = info->user_ptr[0];
3412         struct devlink_param_item *param_item;
3413         struct sk_buff *msg;
3414         int err;
3415
3416         param_item = devlink_param_get_from_info(&devlink->param_list, info);
3417         if (!param_item)
3418                 return -EINVAL;
3419
3420         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3421         if (!msg)
3422                 return -ENOMEM;
3423
3424         err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3425                                     DEVLINK_CMD_PARAM_GET,
3426                                     info->snd_portid, info->snd_seq, 0);
3427         if (err) {
3428                 nlmsg_free(msg);
3429                 return err;
3430         }
3431
3432         return genlmsg_reply(msg, info);
3433 }
3434
3435 static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink,
3436                                            unsigned int port_index,
3437                                            struct list_head *param_list,
3438                                            struct genl_info *info,
3439                                            enum devlink_command cmd)
3440 {
3441         enum devlink_param_type param_type;
3442         struct devlink_param_gset_ctx ctx;
3443         enum devlink_param_cmode cmode;
3444         struct devlink_param_item *param_item;
3445         const struct devlink_param *param;
3446         union devlink_param_value value;
3447         int err = 0;
3448
3449         param_item = devlink_param_get_from_info(param_list, info);
3450         if (!param_item)
3451                 return -EINVAL;
3452         param = param_item->param;
3453         err = devlink_param_type_get_from_info(info, &param_type);
3454         if (err)
3455                 return err;
3456         if (param_type != param->type)
3457                 return -EINVAL;
3458         err = devlink_param_value_get_from_info(param, info, &value);
3459         if (err)
3460                 return err;
3461         if (param->validate) {
3462                 err = param->validate(devlink, param->id, value, info->extack);
3463                 if (err)
3464                         return err;
3465         }
3466
3467         if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE])
3468                 return -EINVAL;
3469         cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
3470         if (!devlink_param_cmode_is_supported(param, cmode))
3471                 return -EOPNOTSUPP;
3472
3473         if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3474                 if (param->type == DEVLINK_PARAM_TYPE_STRING)
3475                         strcpy(param_item->driverinit_value.vstr, value.vstr);
3476                 else
3477                         param_item->driverinit_value = value;
3478                 param_item->driverinit_value_valid = true;
3479         } else {
3480                 if (!param->set)
3481                         return -EOPNOTSUPP;
3482                 ctx.val = value;
3483                 ctx.cmode = cmode;
3484                 err = devlink_param_set(devlink, param, &ctx);
3485                 if (err)
3486                         return err;
3487         }
3488
3489         devlink_param_notify(devlink, port_index, param_item, cmd);
3490         return 0;
3491 }
3492
3493 static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
3494                                          struct genl_info *info)
3495 {
3496         struct devlink *devlink = info->user_ptr[0];
3497
3498         return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->param_list,
3499                                                info, DEVLINK_CMD_PARAM_NEW);
3500 }
3501
3502 static int devlink_param_register_one(struct devlink *devlink,
3503                                       unsigned int port_index,
3504                                       struct list_head *param_list,
3505                                       const struct devlink_param *param,
3506                                       enum devlink_command cmd)
3507 {
3508         struct devlink_param_item *param_item;
3509
3510         if (devlink_param_find_by_name(param_list, param->name))
3511                 return -EEXIST;
3512
3513         if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
3514                 WARN_ON(param->get || param->set);
3515         else
3516                 WARN_ON(!param->get || !param->set);
3517
3518         param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
3519         if (!param_item)
3520                 return -ENOMEM;
3521         param_item->param = param;
3522
3523         list_add_tail(&param_item->list, param_list);
3524         devlink_param_notify(devlink, port_index, param_item, cmd);
3525         return 0;
3526 }
3527
3528 static void devlink_param_unregister_one(struct devlink *devlink,
3529                                          unsigned int port_index,
3530                                          struct list_head *param_list,
3531                                          const struct devlink_param *param,
3532                                          enum devlink_command cmd)
3533 {
3534         struct devlink_param_item *param_item;
3535
3536         param_item = devlink_param_find_by_name(param_list, param->name);
3537         WARN_ON(!param_item);
3538         devlink_param_notify(devlink, port_index, param_item, cmd);
3539         list_del(&param_item->list);
3540         kfree(param_item);
3541 }
3542
3543 static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg,
3544                                                 struct netlink_callback *cb)
3545 {
3546         struct devlink_param_item *param_item;
3547         struct devlink_port *devlink_port;
3548         struct devlink *devlink;
3549         int start = cb->args[0];
3550         int idx = 0;
3551         int err = 0;
3552
3553         mutex_lock(&devlink_mutex);
3554         list_for_each_entry(devlink, &devlink_list, list) {
3555                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3556                         continue;
3557                 mutex_lock(&devlink->lock);
3558                 list_for_each_entry(devlink_port, &devlink->port_list, list) {
3559                         list_for_each_entry(param_item,
3560                                             &devlink_port->param_list, list) {
3561                                 if (idx < start) {
3562                                         idx++;
3563                                         continue;
3564                                 }
3565                                 err = devlink_nl_param_fill(msg,
3566                                                 devlink_port->devlink,
3567                                                 devlink_port->index, param_item,
3568                                                 DEVLINK_CMD_PORT_PARAM_GET,
3569                                                 NETLINK_CB(cb->skb).portid,
3570                                                 cb->nlh->nlmsg_seq,
3571                                                 NLM_F_MULTI);
3572                                 if (err && err != -EOPNOTSUPP) {
3573                                         mutex_unlock(&devlink->lock);
3574                                         goto out;
3575                                 }
3576                                 idx++;
3577                         }
3578                 }
3579                 mutex_unlock(&devlink->lock);
3580         }
3581 out:
3582         mutex_unlock(&devlink_mutex);
3583
3584         if (err != -EMSGSIZE)
3585                 return err;
3586
3587         cb->args[0] = idx;
3588         return msg->len;
3589 }
3590
3591 static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
3592                                               struct genl_info *info)
3593 {
3594         struct devlink_port *devlink_port = info->user_ptr[0];
3595         struct devlink_param_item *param_item;
3596         struct sk_buff *msg;
3597         int err;
3598
3599         param_item = devlink_param_get_from_info(&devlink_port->param_list,
3600                                                  info);
3601         if (!param_item)
3602                 return -EINVAL;
3603
3604         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3605         if (!msg)
3606                 return -ENOMEM;
3607
3608         err = devlink_nl_param_fill(msg, devlink_port->devlink,
3609                                     devlink_port->index, param_item,
3610                                     DEVLINK_CMD_PORT_PARAM_GET,
3611                                     info->snd_portid, info->snd_seq, 0);
3612         if (err) {
3613                 nlmsg_free(msg);
3614                 return err;
3615         }
3616
3617         return genlmsg_reply(msg, info);
3618 }
3619
3620 static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
3621                                               struct genl_info *info)
3622 {
3623         struct devlink_port *devlink_port = info->user_ptr[0];
3624
3625         return __devlink_nl_cmd_param_set_doit(devlink_port->devlink,
3626                                                devlink_port->index,
3627                                                &devlink_port->param_list, info,
3628                                                DEVLINK_CMD_PORT_PARAM_NEW);
3629 }
3630
3631 static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
3632                                              struct devlink *devlink,
3633                                              struct devlink_snapshot *snapshot)
3634 {
3635         struct nlattr *snap_attr;
3636         int err;
3637
3638         snap_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
3639         if (!snap_attr)
3640                 return -EINVAL;
3641
3642         err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
3643         if (err)
3644                 goto nla_put_failure;
3645
3646         nla_nest_end(msg, snap_attr);
3647         return 0;
3648
3649 nla_put_failure:
3650         nla_nest_cancel(msg, snap_attr);
3651         return err;
3652 }
3653
3654 static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
3655                                               struct devlink *devlink,
3656                                               struct devlink_region *region)
3657 {
3658         struct devlink_snapshot *snapshot;
3659         struct nlattr *snapshots_attr;
3660         int err;
3661
3662         snapshots_attr = nla_nest_start_noflag(msg,
3663                                                DEVLINK_ATTR_REGION_SNAPSHOTS);
3664         if (!snapshots_attr)
3665                 return -EINVAL;
3666
3667         list_for_each_entry(snapshot, &region->snapshot_list, list) {
3668                 err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
3669                 if (err)
3670                         goto nla_put_failure;
3671         }
3672
3673         nla_nest_end(msg, snapshots_attr);
3674         return 0;
3675
3676 nla_put_failure:
3677         nla_nest_cancel(msg, snapshots_attr);
3678         return err;
3679 }
3680
3681 static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
3682                                   enum devlink_command cmd, u32 portid,
3683                                   u32 seq, int flags,
3684                                   struct devlink_region *region)
3685 {
3686         void *hdr;
3687         int err;
3688
3689         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3690         if (!hdr)
3691                 return -EMSGSIZE;
3692
3693         err = devlink_nl_put_handle(msg, devlink);
3694         if (err)
3695                 goto nla_put_failure;
3696
3697         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->name);
3698         if (err)
3699                 goto nla_put_failure;
3700
3701         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3702                                 region->size,
3703                                 DEVLINK_ATTR_PAD);
3704         if (err)
3705                 goto nla_put_failure;
3706
3707         err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
3708         if (err)
3709                 goto nla_put_failure;
3710
3711         genlmsg_end(msg, hdr);
3712         return 0;
3713
3714 nla_put_failure:
3715         genlmsg_cancel(msg, hdr);
3716         return err;
3717 }
3718
3719 static void devlink_nl_region_notify(struct devlink_region *region,
3720                                      struct devlink_snapshot *snapshot,
3721                                      enum devlink_command cmd)
3722 {
3723         struct devlink *devlink = region->devlink;
3724         struct sk_buff *msg;
3725         void *hdr;
3726         int err;
3727
3728         WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
3729
3730         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3731         if (!msg)
3732                 return;
3733
3734         hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
3735         if (!hdr)
3736                 goto out_free_msg;
3737
3738         err = devlink_nl_put_handle(msg, devlink);
3739         if (err)
3740                 goto out_cancel_msg;
3741
3742         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
3743                              region->name);
3744         if (err)
3745                 goto out_cancel_msg;
3746
3747         if (snapshot) {
3748                 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
3749                                   snapshot->id);
3750                 if (err)
3751                         goto out_cancel_msg;
3752         } else {
3753                 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3754                                         region->size, DEVLINK_ATTR_PAD);
3755                 if (err)
3756                         goto out_cancel_msg;
3757         }
3758         genlmsg_end(msg, hdr);
3759
3760         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3761                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3762
3763         return;
3764
3765 out_cancel_msg:
3766         genlmsg_cancel(msg, hdr);
3767 out_free_msg:
3768         nlmsg_free(msg);
3769 }
3770
3771 static void devlink_region_snapshot_del(struct devlink_region *region,
3772                                         struct devlink_snapshot *snapshot)
3773 {
3774         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
3775         region->cur_snapshots--;
3776         list_del(&snapshot->list);
3777         (*snapshot->data_destructor)(snapshot->data);
3778         kfree(snapshot);
3779 }
3780
3781 static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
3782                                           struct genl_info *info)
3783 {
3784         struct devlink *devlink = info->user_ptr[0];
3785         struct devlink_region *region;
3786         const char *region_name;
3787         struct sk_buff *msg;
3788         int err;
3789
3790         if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
3791                 return -EINVAL;
3792
3793         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3794         region = devlink_region_get_by_name(devlink, region_name);
3795         if (!region)
3796                 return -EINVAL;
3797
3798         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3799         if (!msg)
3800                 return -ENOMEM;
3801
3802         err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
3803                                      info->snd_portid, info->snd_seq, 0,
3804                                      region);
3805         if (err) {
3806                 nlmsg_free(msg);
3807                 return err;
3808         }
3809
3810         return genlmsg_reply(msg, info);
3811 }
3812
3813 static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
3814                                             struct netlink_callback *cb)
3815 {
3816         struct devlink_region *region;
3817         struct devlink *devlink;
3818         int start = cb->args[0];
3819         int idx = 0;
3820         int err;
3821
3822         mutex_lock(&devlink_mutex);
3823         list_for_each_entry(devlink, &devlink_list, list) {
3824                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3825                         continue;
3826
3827                 mutex_lock(&devlink->lock);
3828                 list_for_each_entry(region, &devlink->region_list, list) {
3829                         if (idx < start) {
3830                                 idx++;
3831                                 continue;
3832                         }
3833                         err = devlink_nl_region_fill(msg, devlink,
3834                                                      DEVLINK_CMD_REGION_GET,
3835                                                      NETLINK_CB(cb->skb).portid,
3836                                                      cb->nlh->nlmsg_seq,
3837                                                      NLM_F_MULTI, region);
3838                         if (err) {
3839                                 mutex_unlock(&devlink->lock);
3840                                 goto out;
3841                         }
3842                         idx++;
3843                 }
3844                 mutex_unlock(&devlink->lock);
3845         }
3846 out:
3847         mutex_unlock(&devlink_mutex);
3848         cb->args[0] = idx;
3849         return msg->len;
3850 }
3851
3852 static int devlink_nl_cmd_region_del(struct sk_buff *skb,
3853                                      struct genl_info *info)
3854 {
3855         struct devlink *devlink = info->user_ptr[0];
3856         struct devlink_snapshot *snapshot;
3857         struct devlink_region *region;
3858         const char *region_name;
3859         u32 snapshot_id;
3860
3861         if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
3862             !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
3863                 return -EINVAL;
3864
3865         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3866         snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3867
3868         region = devlink_region_get_by_name(devlink, region_name);
3869         if (!region)
3870                 return -EINVAL;
3871
3872         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3873         if (!snapshot)
3874                 return -EINVAL;
3875
3876         devlink_region_snapshot_del(region, snapshot);
3877         return 0;
3878 }
3879
3880 static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
3881                                                  struct devlink *devlink,
3882                                                  u8 *chunk, u32 chunk_size,
3883                                                  u64 addr)
3884 {
3885         struct nlattr *chunk_attr;
3886         int err;
3887
3888         chunk_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_CHUNK);
3889         if (!chunk_attr)
3890                 return -EINVAL;
3891
3892         err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
3893         if (err)
3894                 goto nla_put_failure;
3895
3896         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
3897                                 DEVLINK_ATTR_PAD);
3898         if (err)
3899                 goto nla_put_failure;
3900
3901         nla_nest_end(msg, chunk_attr);
3902         return 0;
3903
3904 nla_put_failure:
3905         nla_nest_cancel(msg, chunk_attr);
3906         return err;
3907 }
3908
3909 #define DEVLINK_REGION_READ_CHUNK_SIZE 256
3910
3911 static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
3912                                                 struct devlink *devlink,
3913                                                 struct devlink_region *region,
3914                                                 struct nlattr **attrs,
3915                                                 u64 start_offset,
3916                                                 u64 end_offset,
3917                                                 bool dump,
3918                                                 u64 *new_offset)
3919 {
3920         struct devlink_snapshot *snapshot;
3921         u64 curr_offset = start_offset;
3922         u32 snapshot_id;
3923         int err = 0;
3924
3925         *new_offset = start_offset;
3926
3927         snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3928         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3929         if (!snapshot)
3930                 return -EINVAL;
3931
3932         if (end_offset > region->size || dump)
3933                 end_offset = region->size;
3934
3935         while (curr_offset < end_offset) {
3936                 u32 data_size;
3937                 u8 *data;
3938
3939                 if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
3940                         data_size = end_offset - curr_offset;
3941                 else
3942                         data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
3943
3944                 data = &snapshot->data[curr_offset];
3945                 err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
3946                                                             data, data_size,
3947                                                             curr_offset);
3948                 if (err)
3949                         break;
3950
3951                 curr_offset += data_size;
3952         }
3953         *new_offset = curr_offset;
3954
3955         return err;
3956 }
3957
3958 static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
3959                                              struct netlink_callback *cb)
3960 {
3961         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
3962         u64 ret_offset, start_offset, end_offset = 0;
3963         struct nlattr **attrs = info->attrs;
3964         struct devlink_region *region;
3965         struct nlattr *chunks_attr;
3966         const char *region_name;
3967         struct devlink *devlink;
3968         bool dump = true;
3969         void *hdr;
3970         int err;
3971
3972         start_offset = *((u64 *)&cb->args[0]);
3973
3974         mutex_lock(&devlink_mutex);
3975         devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
3976         if (IS_ERR(devlink)) {
3977                 err = PTR_ERR(devlink);
3978                 goto out_dev;
3979         }
3980
3981         mutex_lock(&devlink->lock);
3982
3983         if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
3984             !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
3985                 err = -EINVAL;
3986                 goto out_unlock;
3987         }
3988
3989         region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
3990         region = devlink_region_get_by_name(devlink, region_name);
3991         if (!region) {
3992                 err = -EINVAL;
3993                 goto out_unlock;
3994         }
3995
3996         /* return 0 if there is no further data to read */
3997         if (start_offset >= region->size) {
3998                 err = 0;
3999                 goto out_unlock;
4000         }
4001
4002         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
4003                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
4004                           DEVLINK_CMD_REGION_READ);
4005         if (!hdr) {
4006                 err = -EMSGSIZE;
4007                 goto out_unlock;
4008         }
4009
4010         err = devlink_nl_put_handle(skb, devlink);
4011         if (err)
4012                 goto nla_put_failure;
4013
4014         err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
4015         if (err)
4016                 goto nla_put_failure;
4017
4018         chunks_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_REGION_CHUNKS);
4019         if (!chunks_attr) {
4020                 err = -EMSGSIZE;
4021                 goto nla_put_failure;
4022         }
4023
4024         if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
4025             attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
4026                 if (!start_offset)
4027                         start_offset =
4028                                 nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4029
4030                 end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4031                 end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
4032                 dump = false;
4033         }
4034
4035         err = devlink_nl_region_read_snapshot_fill(skb, devlink,
4036                                                    region, attrs,
4037                                                    start_offset,
4038                                                    end_offset, dump,
4039                                                    &ret_offset);
4040
4041         if (err && err != -EMSGSIZE)
4042                 goto nla_put_failure;
4043
4044         /* Check if there was any progress done to prevent infinite loop */
4045         if (ret_offset == start_offset) {
4046                 err = -EINVAL;
4047                 goto nla_put_failure;
4048         }
4049
4050         *((u64 *)&cb->args[0]) = ret_offset;
4051
4052         nla_nest_end(skb, chunks_attr);
4053         genlmsg_end(skb, hdr);
4054         mutex_unlock(&devlink->lock);
4055         mutex_unlock(&devlink_mutex);
4056
4057         return skb->len;
4058
4059 nla_put_failure:
4060         genlmsg_cancel(skb, hdr);
4061 out_unlock:
4062         mutex_unlock(&devlink->lock);
4063 out_dev:
4064         mutex_unlock(&devlink_mutex);
4065         return err;
4066 }
4067
4068 struct devlink_info_req {
4069         struct sk_buff *msg;
4070 };
4071
4072 int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name)
4073 {
4074         return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name);
4075 }
4076 EXPORT_SYMBOL_GPL(devlink_info_driver_name_put);
4077
4078 int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
4079 {
4080         return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn);
4081 }
4082 EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
4083
4084 static int devlink_info_version_put(struct devlink_info_req *req, int attr,
4085                                     const char *version_name,
4086                                     const char *version_value)
4087 {
4088         struct nlattr *nest;
4089         int err;
4090
4091         nest = nla_nest_start_noflag(req->msg, attr);
4092         if (!nest)
4093                 return -EMSGSIZE;
4094
4095         err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME,
4096                              version_name);
4097         if (err)
4098                 goto nla_put_failure;
4099
4100         err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE,
4101                              version_value);
4102         if (err)
4103                 goto nla_put_failure;
4104
4105         nla_nest_end(req->msg, nest);
4106
4107         return 0;
4108
4109 nla_put_failure:
4110         nla_nest_cancel(req->msg, nest);
4111         return err;
4112 }
4113
4114 int devlink_info_version_fixed_put(struct devlink_info_req *req,
4115                                    const char *version_name,
4116                                    const char *version_value)
4117 {
4118         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED,
4119                                         version_name, version_value);
4120 }
4121 EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
4122
4123 int devlink_info_version_stored_put(struct devlink_info_req *req,
4124                                     const char *version_name,
4125                                     const char *version_value)
4126 {
4127         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
4128                                         version_name, version_value);
4129 }
4130 EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
4131
4132 int devlink_info_version_running_put(struct devlink_info_req *req,
4133                                      const char *version_name,
4134                                      const char *version_value)
4135 {
4136         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
4137                                         version_name, version_value);
4138 }
4139 EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
4140
4141 static int
4142 devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
4143                      enum devlink_command cmd, u32 portid,
4144                      u32 seq, int flags, struct netlink_ext_ack *extack)
4145 {
4146         struct devlink_info_req req;
4147         void *hdr;
4148         int err;
4149
4150         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4151         if (!hdr)
4152                 return -EMSGSIZE;
4153
4154         err = -EMSGSIZE;
4155         if (devlink_nl_put_handle(msg, devlink))
4156                 goto err_cancel_msg;
4157
4158         req.msg = msg;
4159         err = devlink->ops->info_get(devlink, &req, extack);
4160         if (err)
4161                 goto err_cancel_msg;
4162
4163         genlmsg_end(msg, hdr);
4164         return 0;
4165
4166 err_cancel_msg:
4167         genlmsg_cancel(msg, hdr);
4168         return err;
4169 }
4170
4171 static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb,
4172                                         struct genl_info *info)
4173 {
4174         struct devlink *devlink = info->user_ptr[0];
4175         struct sk_buff *msg;
4176         int err;
4177
4178         if (!devlink->ops->info_get)
4179                 return -EOPNOTSUPP;
4180
4181         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4182         if (!msg)
4183                 return -ENOMEM;
4184
4185         err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4186                                    info->snd_portid, info->snd_seq, 0,
4187                                    info->extack);
4188         if (err) {
4189                 nlmsg_free(msg);
4190                 return err;
4191         }
4192
4193         return genlmsg_reply(msg, info);
4194 }
4195
4196 static int devlink_nl_cmd_info_get_dumpit(struct sk_buff *msg,
4197                                           struct netlink_callback *cb)
4198 {
4199         struct devlink *devlink;
4200         int start = cb->args[0];
4201         int idx = 0;
4202         int err = 0;
4203
4204         mutex_lock(&devlink_mutex);
4205         list_for_each_entry(devlink, &devlink_list, list) {
4206                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4207                         continue;
4208                 if (idx < start) {
4209                         idx++;
4210                         continue;
4211                 }
4212
4213                 if (!devlink->ops->info_get) {
4214                         idx++;
4215                         continue;
4216                 }
4217
4218                 mutex_lock(&devlink->lock);
4219                 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4220                                            NETLINK_CB(cb->skb).portid,
4221                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
4222                                            cb->extack);
4223                 mutex_unlock(&devlink->lock);
4224                 if (err && err != -EOPNOTSUPP)
4225                         break;
4226                 idx++;
4227         }
4228         mutex_unlock(&devlink_mutex);
4229
4230         if (err != -EMSGSIZE)
4231                 return err;
4232
4233         cb->args[0] = idx;
4234         return msg->len;
4235 }
4236
4237 struct devlink_fmsg_item {
4238         struct list_head list;
4239         int attrtype;
4240         u8 nla_type;
4241         u16 len;
4242         int value[0];
4243 };
4244
4245 struct devlink_fmsg {
4246         struct list_head item_list;
4247 };
4248
4249 static struct devlink_fmsg *devlink_fmsg_alloc(void)
4250 {
4251         struct devlink_fmsg *fmsg;
4252
4253         fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
4254         if (!fmsg)
4255                 return NULL;
4256
4257         INIT_LIST_HEAD(&fmsg->item_list);
4258
4259         return fmsg;
4260 }
4261
4262 static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
4263 {
4264         struct devlink_fmsg_item *item, *tmp;
4265
4266         list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
4267                 list_del(&item->list);
4268                 kfree(item);
4269         }
4270         kfree(fmsg);
4271 }
4272
4273 static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
4274                                     int attrtype)
4275 {
4276         struct devlink_fmsg_item *item;
4277
4278         item = kzalloc(sizeof(*item), GFP_KERNEL);
4279         if (!item)
4280                 return -ENOMEM;
4281
4282         item->attrtype = attrtype;
4283         list_add_tail(&item->list, &fmsg->item_list);
4284
4285         return 0;
4286 }
4287
4288 int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
4289 {
4290         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
4291 }
4292 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
4293
4294 static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
4295 {
4296         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
4297 }
4298
4299 int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
4300 {
4301         return devlink_fmsg_nest_end(fmsg);
4302 }
4303 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
4304
4305 #define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
4306
4307 static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
4308 {
4309         struct devlink_fmsg_item *item;
4310
4311         if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
4312                 return -EMSGSIZE;
4313
4314         item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
4315         if (!item)
4316                 return -ENOMEM;
4317
4318         item->nla_type = NLA_NUL_STRING;
4319         item->len = strlen(name) + 1;
4320         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
4321         memcpy(&item->value, name, item->len);
4322         list_add_tail(&item->list, &fmsg->item_list);
4323
4324         return 0;
4325 }
4326
4327 int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
4328 {
4329         int err;
4330
4331         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
4332         if (err)
4333                 return err;
4334
4335         err = devlink_fmsg_put_name(fmsg, name);
4336         if (err)
4337                 return err;
4338
4339         return 0;
4340 }
4341 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
4342
4343 int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
4344 {
4345         return devlink_fmsg_nest_end(fmsg);
4346 }
4347 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
4348
4349 int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
4350                                      const char *name)
4351 {
4352         int err;
4353
4354         err = devlink_fmsg_pair_nest_start(fmsg, name);
4355         if (err)
4356                 return err;
4357
4358         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
4359         if (err)
4360                 return err;
4361
4362         return 0;
4363 }
4364 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
4365
4366 int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
4367 {
4368         int err;
4369
4370         err = devlink_fmsg_nest_end(fmsg);
4371         if (err)
4372                 return err;
4373
4374         err = devlink_fmsg_nest_end(fmsg);
4375         if (err)
4376                 return err;
4377
4378         return 0;
4379 }
4380 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
4381
4382 static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
4383                                   const void *value, u16 value_len,
4384                                   u8 value_nla_type)
4385 {
4386         struct devlink_fmsg_item *item;
4387
4388         if (value_len > DEVLINK_FMSG_MAX_SIZE)
4389                 return -EMSGSIZE;
4390
4391         item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
4392         if (!item)
4393                 return -ENOMEM;
4394
4395         item->nla_type = value_nla_type;
4396         item->len = value_len;
4397         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4398         memcpy(&item->value, value, item->len);
4399         list_add_tail(&item->list, &fmsg->item_list);
4400
4401         return 0;
4402 }
4403
4404 int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
4405 {
4406         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
4407 }
4408 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
4409
4410 int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
4411 {
4412         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
4413 }
4414 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
4415
4416 int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
4417 {
4418         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
4419 }
4420 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
4421
4422 int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
4423 {
4424         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
4425 }
4426 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
4427
4428 int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
4429 {
4430         return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
4431                                       NLA_NUL_STRING);
4432 }
4433 EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
4434
4435 static int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
4436                                    u16 value_len)
4437 {
4438         return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
4439 }
4440
4441 int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
4442                                bool value)
4443 {
4444         int err;
4445
4446         err = devlink_fmsg_pair_nest_start(fmsg, name);
4447         if (err)
4448                 return err;
4449
4450         err = devlink_fmsg_bool_put(fmsg, value);
4451         if (err)
4452                 return err;
4453
4454         err = devlink_fmsg_pair_nest_end(fmsg);
4455         if (err)
4456                 return err;
4457
4458         return 0;
4459 }
4460 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
4461
4462 int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
4463                              u8 value)
4464 {
4465         int err;
4466
4467         err = devlink_fmsg_pair_nest_start(fmsg, name);
4468         if (err)
4469                 return err;
4470
4471         err = devlink_fmsg_u8_put(fmsg, value);
4472         if (err)
4473                 return err;
4474
4475         err = devlink_fmsg_pair_nest_end(fmsg);
4476         if (err)
4477                 return err;
4478
4479         return 0;
4480 }
4481 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
4482
4483 int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
4484                               u32 value)
4485 {
4486         int err;
4487
4488         err = devlink_fmsg_pair_nest_start(fmsg, name);
4489         if (err)
4490                 return err;
4491
4492         err = devlink_fmsg_u32_put(fmsg, value);
4493         if (err)
4494                 return err;
4495
4496         err = devlink_fmsg_pair_nest_end(fmsg);
4497         if (err)
4498                 return err;
4499
4500         return 0;
4501 }
4502 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
4503
4504 int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
4505                               u64 value)
4506 {
4507         int err;
4508
4509         err = devlink_fmsg_pair_nest_start(fmsg, name);
4510         if (err)
4511                 return err;
4512
4513         err = devlink_fmsg_u64_put(fmsg, value);
4514         if (err)
4515                 return err;
4516
4517         err = devlink_fmsg_pair_nest_end(fmsg);
4518         if (err)
4519                 return err;
4520
4521         return 0;
4522 }
4523 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
4524
4525 int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
4526                                  const char *value)
4527 {
4528         int err;
4529
4530         err = devlink_fmsg_pair_nest_start(fmsg, name);
4531         if (err)
4532                 return err;
4533
4534         err = devlink_fmsg_string_put(fmsg, value);
4535         if (err)
4536                 return err;
4537
4538         err = devlink_fmsg_pair_nest_end(fmsg);
4539         if (err)
4540                 return err;
4541
4542         return 0;
4543 }
4544 EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
4545
4546 int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
4547                                  const void *value, u32 value_len)
4548 {
4549         u32 data_size;
4550         u32 offset;
4551         int err;
4552
4553         err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
4554         if (err)
4555                 return err;
4556
4557         for (offset = 0; offset < value_len; offset += data_size) {
4558                 data_size = value_len - offset;
4559                 if (data_size > DEVLINK_FMSG_MAX_SIZE)
4560                         data_size = DEVLINK_FMSG_MAX_SIZE;
4561                 err = devlink_fmsg_binary_put(fmsg, value + offset, data_size);
4562                 if (err)
4563                         return err;
4564         }
4565
4566         err = devlink_fmsg_arr_pair_nest_end(fmsg);
4567         if (err)
4568                 return err;
4569
4570         return 0;
4571 }
4572 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
4573
4574 static int
4575 devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4576 {
4577         switch (msg->nla_type) {
4578         case NLA_FLAG:
4579         case NLA_U8:
4580         case NLA_U32:
4581         case NLA_U64:
4582         case NLA_NUL_STRING:
4583         case NLA_BINARY:
4584                 return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
4585                                   msg->nla_type);
4586         default:
4587                 return -EINVAL;
4588         }
4589 }
4590
4591 static int
4592 devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4593 {
4594         int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4595         u8 tmp;
4596
4597         switch (msg->nla_type) {
4598         case NLA_FLAG:
4599                 /* Always provide flag data, regardless of its value */
4600                 tmp = *(bool *) msg->value;
4601
4602                 return nla_put_u8(skb, attrtype, tmp);
4603         case NLA_U8:
4604                 return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
4605         case NLA_U32:
4606                 return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
4607         case NLA_U64:
4608                 return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
4609                                          DEVLINK_ATTR_PAD);
4610         case NLA_NUL_STRING:
4611                 return nla_put_string(skb, attrtype, (char *) &msg->value);
4612         case NLA_BINARY:
4613                 return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
4614         default:
4615                 return -EINVAL;
4616         }
4617 }
4618
4619 static int
4620 devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4621                          int *start)
4622 {
4623         struct devlink_fmsg_item *item;
4624         struct nlattr *fmsg_nlattr;
4625         int i = 0;
4626         int err;
4627
4628         fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
4629         if (!fmsg_nlattr)
4630                 return -EMSGSIZE;
4631
4632         list_for_each_entry(item, &fmsg->item_list, list) {
4633                 if (i < *start) {
4634                         i++;
4635                         continue;
4636                 }
4637
4638                 switch (item->attrtype) {
4639                 case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
4640                 case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
4641                 case DEVLINK_ATTR_FMSG_ARR_NEST_START:
4642                 case DEVLINK_ATTR_FMSG_NEST_END:
4643                         err = nla_put_flag(skb, item->attrtype);
4644                         break;
4645                 case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
4646                         err = devlink_fmsg_item_fill_type(item, skb);
4647                         if (err)
4648                                 break;
4649                         err = devlink_fmsg_item_fill_data(item, skb);
4650                         break;
4651                 case DEVLINK_ATTR_FMSG_OBJ_NAME:
4652                         err = nla_put_string(skb, item->attrtype,
4653                                              (char *) &item->value);
4654                         break;
4655                 default:
4656                         err = -EINVAL;
4657                         break;
4658                 }
4659                 if (!err)
4660                         *start = ++i;
4661                 else
4662                         break;
4663         }
4664
4665         nla_nest_end(skb, fmsg_nlattr);
4666         return err;
4667 }
4668
4669 static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
4670                             struct genl_info *info,
4671                             enum devlink_command cmd, int flags)
4672 {
4673         struct nlmsghdr *nlh;
4674         struct sk_buff *skb;
4675         bool last = false;
4676         int index = 0;
4677         void *hdr;
4678         int err;
4679
4680         while (!last) {
4681                 int tmp_index = index;
4682
4683                 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4684                 if (!skb)
4685                         return -ENOMEM;
4686
4687                 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
4688                                   &devlink_nl_family, flags | NLM_F_MULTI, cmd);
4689                 if (!hdr) {
4690                         err = -EMSGSIZE;
4691                         goto nla_put_failure;
4692                 }
4693
4694                 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
4695                 if (!err)
4696                         last = true;
4697                 else if (err != -EMSGSIZE || tmp_index == index)
4698                         goto nla_put_failure;
4699
4700                 genlmsg_end(skb, hdr);
4701                 err = genlmsg_reply(skb, info);
4702                 if (err)
4703                         return err;
4704         }
4705
4706         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4707         if (!skb)
4708                 return -ENOMEM;
4709         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
4710                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
4711         if (!nlh) {
4712                 err = -EMSGSIZE;
4713                 goto nla_put_failure;
4714         }
4715
4716         return genlmsg_reply(skb, info);
4717
4718 nla_put_failure:
4719         nlmsg_free(skb);
4720         return err;
4721 }
4722
4723 static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4724                                struct netlink_callback *cb,
4725                                enum devlink_command cmd)
4726 {
4727         int index = cb->args[0];
4728         int tmp_index = index;
4729         void *hdr;
4730         int err;
4731
4732         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
4733                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
4734         if (!hdr) {
4735                 err = -EMSGSIZE;
4736                 goto nla_put_failure;
4737         }
4738
4739         err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
4740         if ((err && err != -EMSGSIZE) || tmp_index == index)
4741                 goto nla_put_failure;
4742
4743         cb->args[0] = index;
4744         genlmsg_end(skb, hdr);
4745         return skb->len;
4746
4747 nla_put_failure:
4748         genlmsg_cancel(skb, hdr);
4749         return err;
4750 }
4751
4752 struct devlink_health_reporter {
4753         struct list_head list;
4754         void *priv;
4755         const struct devlink_health_reporter_ops *ops;
4756         struct devlink *devlink;
4757         struct devlink_fmsg *dump_fmsg;
4758         struct mutex dump_lock; /* lock parallel read/write from dump buffers */
4759         u64 graceful_period;
4760         bool auto_recover;
4761         u8 health_state;
4762         u64 dump_ts;
4763         u64 dump_real_ts;
4764         u64 error_count;
4765         u64 recovery_count;
4766         u64 last_recovery_ts;
4767         refcount_t refcount;
4768 };
4769
4770 void *
4771 devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
4772 {
4773         return reporter->priv;
4774 }
4775 EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
4776
4777 static struct devlink_health_reporter *
4778 devlink_health_reporter_find_by_name(struct devlink *devlink,
4779                                      const char *reporter_name)
4780 {
4781         struct devlink_health_reporter *reporter;
4782
4783         lockdep_assert_held(&devlink->reporters_lock);
4784         list_for_each_entry(reporter, &devlink->reporter_list, list)
4785                 if (!strcmp(reporter->ops->name, reporter_name))
4786                         return reporter;
4787         return NULL;
4788 }
4789
4790 /**
4791  *      devlink_health_reporter_create - create devlink health reporter
4792  *
4793  *      @devlink: devlink
4794  *      @ops: ops
4795  *      @graceful_period: to avoid recovery loops, in msecs
4796  *      @auto_recover: auto recover when error occurs
4797  *      @priv: priv
4798  */
4799 struct devlink_health_reporter *
4800 devlink_health_reporter_create(struct devlink *devlink,
4801                                const struct devlink_health_reporter_ops *ops,
4802                                u64 graceful_period, bool auto_recover,
4803                                void *priv)
4804 {
4805         struct devlink_health_reporter *reporter;
4806
4807         mutex_lock(&devlink->reporters_lock);
4808         if (devlink_health_reporter_find_by_name(devlink, ops->name)) {
4809                 reporter = ERR_PTR(-EEXIST);
4810                 goto unlock;
4811         }
4812
4813         if (WARN_ON(auto_recover && !ops->recover) ||
4814             WARN_ON(graceful_period && !ops->recover)) {
4815                 reporter = ERR_PTR(-EINVAL);
4816                 goto unlock;
4817         }
4818
4819         reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
4820         if (!reporter) {
4821                 reporter = ERR_PTR(-ENOMEM);
4822                 goto unlock;
4823         }
4824
4825         reporter->priv = priv;
4826         reporter->ops = ops;
4827         reporter->devlink = devlink;
4828         reporter->graceful_period = graceful_period;
4829         reporter->auto_recover = auto_recover;
4830         mutex_init(&reporter->dump_lock);
4831         refcount_set(&reporter->refcount, 1);
4832         list_add_tail(&reporter->list, &devlink->reporter_list);
4833 unlock:
4834         mutex_unlock(&devlink->reporters_lock);
4835         return reporter;
4836 }
4837 EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
4838
4839 /**
4840  *      devlink_health_reporter_destroy - destroy devlink health reporter
4841  *
4842  *      @reporter: devlink health reporter to destroy
4843  */
4844 void
4845 devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
4846 {
4847         mutex_lock(&reporter->devlink->reporters_lock);
4848         list_del(&reporter->list);
4849         mutex_unlock(&reporter->devlink->reporters_lock);
4850         while (refcount_read(&reporter->refcount) > 1)
4851                 msleep(100);
4852         mutex_destroy(&reporter->dump_lock);
4853         if (reporter->dump_fmsg)
4854                 devlink_fmsg_free(reporter->dump_fmsg);
4855         kfree(reporter);
4856 }
4857 EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
4858
4859 static int
4860 devlink_nl_health_reporter_fill(struct sk_buff *msg,
4861                                 struct devlink *devlink,
4862                                 struct devlink_health_reporter *reporter,
4863                                 enum devlink_command cmd, u32 portid,
4864                                 u32 seq, int flags)
4865 {
4866         struct nlattr *reporter_attr;
4867         void *hdr;
4868
4869         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4870         if (!hdr)
4871                 return -EMSGSIZE;
4872
4873         if (devlink_nl_put_handle(msg, devlink))
4874                 goto genlmsg_cancel;
4875
4876         reporter_attr = nla_nest_start_noflag(msg,
4877                                               DEVLINK_ATTR_HEALTH_REPORTER);
4878         if (!reporter_attr)
4879                 goto genlmsg_cancel;
4880         if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
4881                            reporter->ops->name))
4882                 goto reporter_nest_cancel;
4883         if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
4884                        reporter->health_state))
4885                 goto reporter_nest_cancel;
4886         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
4887                               reporter->error_count, DEVLINK_ATTR_PAD))
4888                 goto reporter_nest_cancel;
4889         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
4890                               reporter->recovery_count, DEVLINK_ATTR_PAD))
4891                 goto reporter_nest_cancel;
4892         if (reporter->ops->recover &&
4893             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
4894                               reporter->graceful_period,
4895                               DEVLINK_ATTR_PAD))
4896                 goto reporter_nest_cancel;
4897         if (reporter->ops->recover &&
4898             nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
4899                        reporter->auto_recover))
4900                 goto reporter_nest_cancel;
4901         if (reporter->dump_fmsg &&
4902             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
4903                               jiffies_to_msecs(reporter->dump_ts),
4904                               DEVLINK_ATTR_PAD))
4905                 goto reporter_nest_cancel;
4906         if (reporter->dump_fmsg &&
4907             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS_NS,
4908                               reporter->dump_real_ts, DEVLINK_ATTR_PAD))
4909                 goto reporter_nest_cancel;
4910
4911         nla_nest_end(msg, reporter_attr);
4912         genlmsg_end(msg, hdr);
4913         return 0;
4914
4915 reporter_nest_cancel:
4916         nla_nest_end(msg, reporter_attr);
4917 genlmsg_cancel:
4918         genlmsg_cancel(msg, hdr);
4919         return -EMSGSIZE;
4920 }
4921
4922 static void devlink_recover_notify(struct devlink_health_reporter *reporter,
4923                                    enum devlink_command cmd)
4924 {
4925         struct sk_buff *msg;
4926         int err;
4927
4928         WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
4929
4930         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4931         if (!msg)
4932                 return;
4933
4934         err = devlink_nl_health_reporter_fill(msg, reporter->devlink,
4935                                               reporter, cmd, 0, 0, 0);
4936         if (err) {
4937                 nlmsg_free(msg);
4938                 return;
4939         }
4940
4941         genlmsg_multicast_netns(&devlink_nl_family,
4942                                 devlink_net(reporter->devlink),
4943                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
4944 }
4945
4946 void
4947 devlink_health_reporter_recovery_done(struct devlink_health_reporter *reporter)
4948 {
4949         reporter->recovery_count++;
4950         reporter->last_recovery_ts = jiffies;
4951 }
4952 EXPORT_SYMBOL_GPL(devlink_health_reporter_recovery_done);
4953
4954 static int
4955 devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
4956                                 void *priv_ctx, struct netlink_ext_ack *extack)
4957 {
4958         int err;
4959
4960         if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
4961                 return 0;
4962
4963         if (!reporter->ops->recover)
4964                 return -EOPNOTSUPP;
4965
4966         err = reporter->ops->recover(reporter, priv_ctx, extack);
4967         if (err)
4968                 return err;
4969
4970         devlink_health_reporter_recovery_done(reporter);
4971         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
4972         devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
4973
4974         return 0;
4975 }
4976
4977 static void
4978 devlink_health_dump_clear(struct devlink_health_reporter *reporter)
4979 {
4980         if (!reporter->dump_fmsg)
4981                 return;
4982         devlink_fmsg_free(reporter->dump_fmsg);
4983         reporter->dump_fmsg = NULL;
4984 }
4985
4986 static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
4987                                   void *priv_ctx,
4988                                   struct netlink_ext_ack *extack)
4989 {
4990         int err;
4991
4992         if (!reporter->ops->dump)
4993                 return 0;
4994
4995         if (reporter->dump_fmsg)
4996                 return 0;
4997
4998         reporter->dump_fmsg = devlink_fmsg_alloc();
4999         if (!reporter->dump_fmsg) {
5000                 err = -ENOMEM;
5001                 return err;
5002         }
5003
5004         err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
5005         if (err)
5006                 goto dump_err;
5007
5008         err = reporter->ops->dump(reporter, reporter->dump_fmsg,
5009                                   priv_ctx, extack);
5010         if (err)
5011                 goto dump_err;
5012
5013         err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
5014         if (err)
5015                 goto dump_err;
5016
5017         reporter->dump_ts = jiffies;
5018         reporter->dump_real_ts = ktime_get_real_ns();
5019
5020         return 0;
5021
5022 dump_err:
5023         devlink_health_dump_clear(reporter);
5024         return err;
5025 }
5026
5027 int devlink_health_report(struct devlink_health_reporter *reporter,
5028                           const char *msg, void *priv_ctx)
5029 {
5030         enum devlink_health_reporter_state prev_health_state;
5031         struct devlink *devlink = reporter->devlink;
5032
5033         /* write a log message of the current error */
5034         WARN_ON(!msg);
5035         trace_devlink_health_report(devlink, reporter->ops->name, msg);
5036         reporter->error_count++;
5037         prev_health_state = reporter->health_state;
5038         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
5039         devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5040
5041         /* abort if the previous error wasn't recovered */
5042         if (reporter->auto_recover &&
5043             (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
5044              jiffies - reporter->last_recovery_ts <
5045              msecs_to_jiffies(reporter->graceful_period))) {
5046                 trace_devlink_health_recover_aborted(devlink,
5047                                                      reporter->ops->name,
5048                                                      reporter->health_state,
5049                                                      jiffies -
5050                                                      reporter->last_recovery_ts);
5051                 return -ECANCELED;
5052         }
5053
5054         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
5055
5056         mutex_lock(&reporter->dump_lock);
5057         /* store current dump of current error, for later analysis */
5058         devlink_health_do_dump(reporter, priv_ctx, NULL);
5059         mutex_unlock(&reporter->dump_lock);
5060
5061         if (reporter->auto_recover)
5062                 return devlink_health_reporter_recover(reporter,
5063                                                        priv_ctx, NULL);
5064
5065         return 0;
5066 }
5067 EXPORT_SYMBOL_GPL(devlink_health_report);
5068
5069 static struct devlink_health_reporter *
5070 devlink_health_reporter_get_from_attrs(struct devlink *devlink,
5071                                        struct nlattr **attrs)
5072 {
5073         struct devlink_health_reporter *reporter;
5074         char *reporter_name;
5075
5076         if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
5077                 return NULL;
5078
5079         reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
5080         mutex_lock(&devlink->reporters_lock);
5081         reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
5082         if (reporter)
5083                 refcount_inc(&reporter->refcount);
5084         mutex_unlock(&devlink->reporters_lock);
5085         return reporter;
5086 }
5087
5088 static struct devlink_health_reporter *
5089 devlink_health_reporter_get_from_info(struct devlink *devlink,
5090                                       struct genl_info *info)
5091 {
5092         return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
5093 }
5094
5095 static struct devlink_health_reporter *
5096 devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
5097 {
5098         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
5099         struct devlink_health_reporter *reporter;
5100         struct nlattr **attrs = info->attrs;
5101         struct devlink *devlink;
5102
5103         mutex_lock(&devlink_mutex);
5104         devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
5105         if (IS_ERR(devlink))
5106                 goto unlock;
5107
5108         reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
5109         mutex_unlock(&devlink_mutex);
5110         return reporter;
5111 unlock:
5112         mutex_unlock(&devlink_mutex);
5113         return NULL;
5114 }
5115
5116 static void
5117 devlink_health_reporter_put(struct devlink_health_reporter *reporter)
5118 {
5119         refcount_dec(&reporter->refcount);
5120 }
5121
5122 void
5123 devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
5124                                      enum devlink_health_reporter_state state)
5125 {
5126         if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
5127                     state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
5128                 return;
5129
5130         if (reporter->health_state == state)
5131                 return;
5132
5133         reporter->health_state = state;
5134         trace_devlink_health_reporter_state_update(reporter->devlink,
5135                                                    reporter->ops->name, state);
5136         devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5137 }
5138 EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
5139
5140 static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
5141                                                    struct genl_info *info)
5142 {
5143         struct devlink *devlink = info->user_ptr[0];
5144         struct devlink_health_reporter *reporter;
5145         struct sk_buff *msg;
5146         int err;
5147
5148         reporter = devlink_health_reporter_get_from_info(devlink, info);
5149         if (!reporter)
5150                 return -EINVAL;
5151
5152         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5153         if (!msg) {
5154                 err = -ENOMEM;
5155                 goto out;
5156         }
5157
5158         err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
5159                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
5160                                               info->snd_portid, info->snd_seq,
5161                                               0);
5162         if (err) {
5163                 nlmsg_free(msg);
5164                 goto out;
5165         }
5166
5167         err = genlmsg_reply(msg, info);
5168 out:
5169         devlink_health_reporter_put(reporter);
5170         return err;
5171 }
5172
5173 static int
5174 devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
5175                                           struct netlink_callback *cb)
5176 {
5177         struct devlink_health_reporter *reporter;
5178         struct devlink *devlink;
5179         int start = cb->args[0];
5180         int idx = 0;
5181         int err;
5182
5183         mutex_lock(&devlink_mutex);
5184         list_for_each_entry(devlink, &devlink_list, list) {
5185                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5186                         continue;
5187                 mutex_lock(&devlink->reporters_lock);
5188                 list_for_each_entry(reporter, &devlink->reporter_list,
5189                                     list) {
5190                         if (idx < start) {
5191                                 idx++;
5192                                 continue;
5193                         }
5194                         err = devlink_nl_health_reporter_fill(msg, devlink,
5195                                                               reporter,
5196                                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
5197                                                               NETLINK_CB(cb->skb).portid,
5198                                                               cb->nlh->nlmsg_seq,
5199                                                               NLM_F_MULTI);
5200                         if (err) {
5201                                 mutex_unlock(&devlink->reporters_lock);
5202                                 goto out;
5203                         }
5204                         idx++;
5205                 }
5206                 mutex_unlock(&devlink->reporters_lock);
5207         }
5208 out:
5209         mutex_unlock(&devlink_mutex);
5210
5211         cb->args[0] = idx;
5212         return msg->len;
5213 }
5214
5215 static int
5216 devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
5217                                         struct genl_info *info)
5218 {
5219         struct devlink *devlink = info->user_ptr[0];
5220         struct devlink_health_reporter *reporter;
5221         int err;
5222
5223         reporter = devlink_health_reporter_get_from_info(devlink, info);
5224         if (!reporter)
5225                 return -EINVAL;
5226
5227         if (!reporter->ops->recover &&
5228             (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
5229              info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])) {
5230                 err = -EOPNOTSUPP;
5231                 goto out;
5232         }
5233
5234         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
5235                 reporter->graceful_period =
5236                         nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
5237
5238         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
5239                 reporter->auto_recover =
5240                         nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
5241
5242         devlink_health_reporter_put(reporter);
5243         return 0;
5244 out:
5245         devlink_health_reporter_put(reporter);
5246         return err;
5247 }
5248
5249 static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
5250                                                        struct genl_info *info)
5251 {
5252         struct devlink *devlink = info->user_ptr[0];
5253         struct devlink_health_reporter *reporter;
5254         int err;
5255
5256         reporter = devlink_health_reporter_get_from_info(devlink, info);
5257         if (!reporter)
5258                 return -EINVAL;
5259
5260         err = devlink_health_reporter_recover(reporter, NULL, info->extack);
5261
5262         devlink_health_reporter_put(reporter);
5263         return err;
5264 }
5265
5266 static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
5267                                                         struct genl_info *info)
5268 {
5269         struct devlink *devlink = info->user_ptr[0];
5270         struct devlink_health_reporter *reporter;
5271         struct devlink_fmsg *fmsg;
5272         int err;
5273
5274         reporter = devlink_health_reporter_get_from_info(devlink, info);
5275         if (!reporter)
5276                 return -EINVAL;
5277
5278         if (!reporter->ops->diagnose) {
5279                 devlink_health_reporter_put(reporter);
5280                 return -EOPNOTSUPP;
5281         }
5282
5283         fmsg = devlink_fmsg_alloc();
5284         if (!fmsg) {
5285                 devlink_health_reporter_put(reporter);
5286                 return -ENOMEM;
5287         }
5288
5289         err = devlink_fmsg_obj_nest_start(fmsg);
5290         if (err)
5291                 goto out;
5292
5293         err = reporter->ops->diagnose(reporter, fmsg, info->extack);
5294         if (err)
5295                 goto out;
5296
5297         err = devlink_fmsg_obj_nest_end(fmsg);
5298         if (err)
5299                 goto out;
5300
5301         err = devlink_fmsg_snd(fmsg, info,
5302                                DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
5303
5304 out:
5305         devlink_fmsg_free(fmsg);
5306         devlink_health_reporter_put(reporter);
5307         return err;
5308 }
5309
5310 static int
5311 devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
5312                                                struct netlink_callback *cb)
5313 {
5314         struct devlink_health_reporter *reporter;
5315         u64 start = cb->args[0];
5316         int err;
5317
5318         reporter = devlink_health_reporter_get_from_cb(cb);
5319         if (!reporter)
5320                 return -EINVAL;
5321
5322         if (!reporter->ops->dump) {
5323                 err = -EOPNOTSUPP;
5324                 goto out;
5325         }
5326         mutex_lock(&reporter->dump_lock);
5327         if (!start) {
5328                 err = devlink_health_do_dump(reporter, NULL, cb->extack);
5329                 if (err)
5330                         goto unlock;
5331                 cb->args[1] = reporter->dump_ts;
5332         }
5333         if (!reporter->dump_fmsg || cb->args[1] != reporter->dump_ts) {
5334                 NL_SET_ERR_MSG_MOD(cb->extack, "Dump trampled, please retry");
5335                 err = -EAGAIN;
5336                 goto unlock;
5337         }
5338
5339         err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
5340                                   DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
5341 unlock:
5342         mutex_unlock(&reporter->dump_lock);
5343 out:
5344         devlink_health_reporter_put(reporter);
5345         return err;
5346 }
5347
5348 static int
5349 devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
5350                                                struct genl_info *info)
5351 {
5352         struct devlink *devlink = info->user_ptr[0];
5353         struct devlink_health_reporter *reporter;
5354
5355         reporter = devlink_health_reporter_get_from_info(devlink, info);
5356         if (!reporter)
5357                 return -EINVAL;
5358
5359         if (!reporter->ops->dump) {
5360                 devlink_health_reporter_put(reporter);
5361                 return -EOPNOTSUPP;
5362         }
5363
5364         mutex_lock(&reporter->dump_lock);
5365         devlink_health_dump_clear(reporter);
5366         mutex_unlock(&reporter->dump_lock);
5367         devlink_health_reporter_put(reporter);
5368         return 0;
5369 }
5370
5371 struct devlink_stats {
5372         u64 rx_bytes;
5373         u64 rx_packets;
5374         struct u64_stats_sync syncp;
5375 };
5376
5377 /**
5378  * struct devlink_trap_group_item - Packet trap group attributes.
5379  * @group: Immutable packet trap group attributes.
5380  * @refcount: Number of trap items using the group.
5381  * @list: trap_group_list member.
5382  * @stats: Trap group statistics.
5383  *
5384  * Describes packet trap group attributes. Created by devlink during trap
5385  * registration.
5386  */
5387 struct devlink_trap_group_item {
5388         const struct devlink_trap_group *group;
5389         refcount_t refcount;
5390         struct list_head list;
5391         struct devlink_stats __percpu *stats;
5392 };
5393
5394 /**
5395  * struct devlink_trap_item - Packet trap attributes.
5396  * @trap: Immutable packet trap attributes.
5397  * @group_item: Associated group item.
5398  * @list: trap_list member.
5399  * @action: Trap action.
5400  * @stats: Trap statistics.
5401  * @priv: Driver private information.
5402  *
5403  * Describes both mutable and immutable packet trap attributes. Created by
5404  * devlink during trap registration and used for all trap related operations.
5405  */
5406 struct devlink_trap_item {
5407         const struct devlink_trap *trap;
5408         struct devlink_trap_group_item *group_item;
5409         struct list_head list;
5410         enum devlink_trap_action action;
5411         struct devlink_stats __percpu *stats;
5412         void *priv;
5413 };
5414
5415 static struct devlink_trap_item *
5416 devlink_trap_item_lookup(struct devlink *devlink, const char *name)
5417 {
5418         struct devlink_trap_item *trap_item;
5419
5420         list_for_each_entry(trap_item, &devlink->trap_list, list) {
5421                 if (!strcmp(trap_item->trap->name, name))
5422                         return trap_item;
5423         }
5424
5425         return NULL;
5426 }
5427
5428 static struct devlink_trap_item *
5429 devlink_trap_item_get_from_info(struct devlink *devlink,
5430                                 struct genl_info *info)
5431 {
5432         struct nlattr *attr;
5433
5434         if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
5435                 return NULL;
5436         attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
5437
5438         return devlink_trap_item_lookup(devlink, nla_data(attr));
5439 }
5440
5441 static int
5442 devlink_trap_action_get_from_info(struct genl_info *info,
5443                                   enum devlink_trap_action *p_trap_action)
5444 {
5445         u8 val;
5446
5447         val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
5448         switch (val) {
5449         case DEVLINK_TRAP_ACTION_DROP: /* fall-through */
5450         case DEVLINK_TRAP_ACTION_TRAP:
5451                 *p_trap_action = val;
5452                 break;
5453         default:
5454                 return -EINVAL;
5455         }
5456
5457         return 0;
5458 }
5459
5460 static int devlink_trap_metadata_put(struct sk_buff *msg,
5461                                      const struct devlink_trap *trap)
5462 {
5463         struct nlattr *attr;
5464
5465         attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
5466         if (!attr)
5467                 return -EMSGSIZE;
5468
5469         if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
5470             nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
5471                 goto nla_put_failure;
5472
5473         nla_nest_end(msg, attr);
5474
5475         return 0;
5476
5477 nla_put_failure:
5478         nla_nest_cancel(msg, attr);
5479         return -EMSGSIZE;
5480 }
5481
5482 static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
5483                                     struct devlink_stats *stats)
5484 {
5485         int i;
5486
5487         memset(stats, 0, sizeof(*stats));
5488         for_each_possible_cpu(i) {
5489                 struct devlink_stats *cpu_stats;
5490                 u64 rx_packets, rx_bytes;
5491                 unsigned int start;
5492
5493                 cpu_stats = per_cpu_ptr(trap_stats, i);
5494                 do {
5495                         start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
5496                         rx_packets = cpu_stats->rx_packets;
5497                         rx_bytes = cpu_stats->rx_bytes;
5498                 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
5499
5500                 stats->rx_packets += rx_packets;
5501                 stats->rx_bytes += rx_bytes;
5502         }
5503 }
5504
5505 static int devlink_trap_stats_put(struct sk_buff *msg,
5506                                   struct devlink_stats __percpu *trap_stats)
5507 {
5508         struct devlink_stats stats;
5509         struct nlattr *attr;
5510
5511         devlink_trap_stats_read(trap_stats, &stats);
5512
5513         attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
5514         if (!attr)
5515                 return -EMSGSIZE;
5516
5517         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
5518                               stats.rx_packets, DEVLINK_ATTR_PAD))
5519                 goto nla_put_failure;
5520
5521         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
5522                               stats.rx_bytes, DEVLINK_ATTR_PAD))
5523                 goto nla_put_failure;
5524
5525         nla_nest_end(msg, attr);
5526
5527         return 0;
5528
5529 nla_put_failure:
5530         nla_nest_cancel(msg, attr);
5531         return -EMSGSIZE;
5532 }
5533
5534 static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
5535                                 const struct devlink_trap_item *trap_item,
5536                                 enum devlink_command cmd, u32 portid, u32 seq,
5537                                 int flags)
5538 {
5539         struct devlink_trap_group_item *group_item = trap_item->group_item;
5540         void *hdr;
5541         int err;
5542
5543         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5544         if (!hdr)
5545                 return -EMSGSIZE;
5546
5547         if (devlink_nl_put_handle(msg, devlink))
5548                 goto nla_put_failure;
5549
5550         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5551                            group_item->group->name))
5552                 goto nla_put_failure;
5553
5554         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
5555                 goto nla_put_failure;
5556
5557         if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
5558                 goto nla_put_failure;
5559
5560         if (trap_item->trap->generic &&
5561             nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5562                 goto nla_put_failure;
5563
5564         if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
5565                 goto nla_put_failure;
5566
5567         err = devlink_trap_metadata_put(msg, trap_item->trap);
5568         if (err)
5569                 goto nla_put_failure;
5570
5571         err = devlink_trap_stats_put(msg, trap_item->stats);
5572         if (err)
5573                 goto nla_put_failure;
5574
5575         genlmsg_end(msg, hdr);
5576
5577         return 0;
5578
5579 nla_put_failure:
5580         genlmsg_cancel(msg, hdr);
5581         return -EMSGSIZE;
5582 }
5583
5584 static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb,
5585                                         struct genl_info *info)
5586 {
5587         struct netlink_ext_ack *extack = info->extack;
5588         struct devlink *devlink = info->user_ptr[0];
5589         struct devlink_trap_item *trap_item;
5590         struct sk_buff *msg;
5591         int err;
5592
5593         if (list_empty(&devlink->trap_list))
5594                 return -EOPNOTSUPP;
5595
5596         trap_item = devlink_trap_item_get_from_info(devlink, info);
5597         if (!trap_item) {
5598                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
5599                 return -ENOENT;
5600         }
5601
5602         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5603         if (!msg)
5604                 return -ENOMEM;
5605
5606         err = devlink_nl_trap_fill(msg, devlink, trap_item,
5607                                    DEVLINK_CMD_TRAP_NEW, info->snd_portid,
5608                                    info->snd_seq, 0);
5609         if (err)
5610                 goto err_trap_fill;
5611
5612         return genlmsg_reply(msg, info);
5613
5614 err_trap_fill:
5615         nlmsg_free(msg);
5616         return err;
5617 }
5618
5619 static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
5620                                           struct netlink_callback *cb)
5621 {
5622         struct devlink_trap_item *trap_item;
5623         struct devlink *devlink;
5624         int start = cb->args[0];
5625         int idx = 0;
5626         int err;
5627
5628         mutex_lock(&devlink_mutex);
5629         list_for_each_entry(devlink, &devlink_list, list) {
5630                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5631                         continue;
5632                 mutex_lock(&devlink->lock);
5633                 list_for_each_entry(trap_item, &devlink->trap_list, list) {
5634                         if (idx < start) {
5635                                 idx++;
5636                                 continue;
5637                         }
5638                         err = devlink_nl_trap_fill(msg, devlink, trap_item,
5639                                                    DEVLINK_CMD_TRAP_NEW,
5640                                                    NETLINK_CB(cb->skb).portid,
5641                                                    cb->nlh->nlmsg_seq,
5642                                                    NLM_F_MULTI);
5643                         if (err) {
5644                                 mutex_unlock(&devlink->lock);
5645                                 goto out;
5646                         }
5647                         idx++;
5648                 }
5649                 mutex_unlock(&devlink->lock);
5650         }
5651 out:
5652         mutex_unlock(&devlink_mutex);
5653
5654         cb->args[0] = idx;
5655         return msg->len;
5656 }
5657
5658 static int __devlink_trap_action_set(struct devlink *devlink,
5659                                      struct devlink_trap_item *trap_item,
5660                                      enum devlink_trap_action trap_action,
5661                                      struct netlink_ext_ack *extack)
5662 {
5663         int err;
5664
5665         if (trap_item->action != trap_action &&
5666             trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
5667                 NL_SET_ERR_MSG_MOD(extack, "Cannot change action of non-drop traps. Skipping");
5668                 return 0;
5669         }
5670
5671         err = devlink->ops->trap_action_set(devlink, trap_item->trap,
5672                                             trap_action);
5673         if (err)
5674                 return err;
5675
5676         trap_item->action = trap_action;
5677
5678         return 0;
5679 }
5680
5681 static int devlink_trap_action_set(struct devlink *devlink,
5682                                    struct devlink_trap_item *trap_item,
5683                                    struct genl_info *info)
5684 {
5685         enum devlink_trap_action trap_action;
5686         int err;
5687
5688         if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
5689                 return 0;
5690
5691         err = devlink_trap_action_get_from_info(info, &trap_action);
5692         if (err) {
5693                 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
5694                 return -EINVAL;
5695         }
5696
5697         return __devlink_trap_action_set(devlink, trap_item, trap_action,
5698                                          info->extack);
5699 }
5700
5701 static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb,
5702                                         struct genl_info *info)
5703 {
5704         struct netlink_ext_ack *extack = info->extack;
5705         struct devlink *devlink = info->user_ptr[0];
5706         struct devlink_trap_item *trap_item;
5707         int err;
5708
5709         if (list_empty(&devlink->trap_list))
5710                 return -EOPNOTSUPP;
5711
5712         trap_item = devlink_trap_item_get_from_info(devlink, info);
5713         if (!trap_item) {
5714                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
5715                 return -ENOENT;
5716         }
5717
5718         err = devlink_trap_action_set(devlink, trap_item, info);
5719         if (err)
5720                 return err;
5721
5722         return 0;
5723 }
5724
5725 static struct devlink_trap_group_item *
5726 devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
5727 {
5728         struct devlink_trap_group_item *group_item;
5729
5730         list_for_each_entry(group_item, &devlink->trap_group_list, list) {
5731                 if (!strcmp(group_item->group->name, name))
5732                         return group_item;
5733         }
5734
5735         return NULL;
5736 }
5737
5738 static struct devlink_trap_group_item *
5739 devlink_trap_group_item_get_from_info(struct devlink *devlink,
5740                                       struct genl_info *info)
5741 {
5742         char *name;
5743
5744         if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
5745                 return NULL;
5746         name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
5747
5748         return devlink_trap_group_item_lookup(devlink, name);
5749 }
5750
5751 static int
5752 devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
5753                            const struct devlink_trap_group_item *group_item,
5754                            enum devlink_command cmd, u32 portid, u32 seq,
5755                            int flags)
5756 {
5757         void *hdr;
5758         int err;
5759
5760         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5761         if (!hdr)
5762                 return -EMSGSIZE;
5763
5764         if (devlink_nl_put_handle(msg, devlink))
5765                 goto nla_put_failure;
5766
5767         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5768                            group_item->group->name))
5769                 goto nla_put_failure;
5770
5771         if (group_item->group->generic &&
5772             nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5773                 goto nla_put_failure;
5774
5775         err = devlink_trap_stats_put(msg, group_item->stats);
5776         if (err)
5777                 goto nla_put_failure;
5778
5779         genlmsg_end(msg, hdr);
5780
5781         return 0;
5782
5783 nla_put_failure:
5784         genlmsg_cancel(msg, hdr);
5785         return -EMSGSIZE;
5786 }
5787
5788 static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb,
5789                                               struct genl_info *info)
5790 {
5791         struct netlink_ext_ack *extack = info->extack;
5792         struct devlink *devlink = info->user_ptr[0];
5793         struct devlink_trap_group_item *group_item;
5794         struct sk_buff *msg;
5795         int err;
5796
5797         if (list_empty(&devlink->trap_group_list))
5798                 return -EOPNOTSUPP;
5799
5800         group_item = devlink_trap_group_item_get_from_info(devlink, info);
5801         if (!group_item) {
5802                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
5803                 return -ENOENT;
5804         }
5805
5806         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5807         if (!msg)
5808                 return -ENOMEM;
5809
5810         err = devlink_nl_trap_group_fill(msg, devlink, group_item,
5811                                          DEVLINK_CMD_TRAP_GROUP_NEW,
5812                                          info->snd_portid, info->snd_seq, 0);
5813         if (err)
5814                 goto err_trap_group_fill;
5815
5816         return genlmsg_reply(msg, info);
5817
5818 err_trap_group_fill:
5819         nlmsg_free(msg);
5820         return err;
5821 }
5822
5823 static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
5824                                                 struct netlink_callback *cb)
5825 {
5826         enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW;
5827         struct devlink_trap_group_item *group_item;
5828         u32 portid = NETLINK_CB(cb->skb).portid;
5829         struct devlink *devlink;
5830         int start = cb->args[0];
5831         int idx = 0;
5832         int err;
5833
5834         mutex_lock(&devlink_mutex);
5835         list_for_each_entry(devlink, &devlink_list, list) {
5836                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5837                         continue;
5838                 mutex_lock(&devlink->lock);
5839                 list_for_each_entry(group_item, &devlink->trap_group_list,
5840                                     list) {
5841                         if (idx < start) {
5842                                 idx++;
5843                                 continue;
5844                         }
5845                         err = devlink_nl_trap_group_fill(msg, devlink,
5846                                                          group_item, cmd,
5847                                                          portid,
5848                                                          cb->nlh->nlmsg_seq,
5849                                                          NLM_F_MULTI);
5850                         if (err) {
5851                                 mutex_unlock(&devlink->lock);
5852                                 goto out;
5853                         }
5854                         idx++;
5855                 }
5856                 mutex_unlock(&devlink->lock);
5857         }
5858 out:
5859         mutex_unlock(&devlink_mutex);
5860
5861         cb->args[0] = idx;
5862         return msg->len;
5863 }
5864
5865 static int
5866 __devlink_trap_group_action_set(struct devlink *devlink,
5867                                 struct devlink_trap_group_item *group_item,
5868                                 enum devlink_trap_action trap_action,
5869                                 struct netlink_ext_ack *extack)
5870 {
5871         const char *group_name = group_item->group->name;
5872         struct devlink_trap_item *trap_item;
5873         int err;
5874
5875         list_for_each_entry(trap_item, &devlink->trap_list, list) {
5876                 if (strcmp(trap_item->trap->group.name, group_name))
5877                         continue;
5878                 err = __devlink_trap_action_set(devlink, trap_item,
5879                                                 trap_action, extack);
5880                 if (err)
5881                         return err;
5882         }
5883
5884         return 0;
5885 }
5886
5887 static int
5888 devlink_trap_group_action_set(struct devlink *devlink,
5889                               struct devlink_trap_group_item *group_item,
5890                               struct genl_info *info)
5891 {
5892         enum devlink_trap_action trap_action;
5893         int err;
5894
5895         if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
5896                 return 0;
5897
5898         err = devlink_trap_action_get_from_info(info, &trap_action);
5899         if (err) {
5900                 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
5901                 return -EINVAL;
5902         }
5903
5904         err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
5905                                               info->extack);
5906         if (err)
5907                 return err;
5908
5909         return 0;
5910 }
5911
5912 static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
5913                                               struct genl_info *info)
5914 {
5915         struct netlink_ext_ack *extack = info->extack;
5916         struct devlink *devlink = info->user_ptr[0];
5917         struct devlink_trap_group_item *group_item;
5918         int err;
5919
5920         if (list_empty(&devlink->trap_group_list))
5921                 return -EOPNOTSUPP;
5922
5923         group_item = devlink_trap_group_item_get_from_info(devlink, info);
5924         if (!group_item) {
5925                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
5926                 return -ENOENT;
5927         }
5928
5929         err = devlink_trap_group_action_set(devlink, group_item, info);
5930         if (err)
5931                 return err;
5932
5933         return 0;
5934 }
5935
5936 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
5937         [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
5938         [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
5939         [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
5940         [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
5941         [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
5942         [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
5943         [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
5944         [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
5945         [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
5946         [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
5947         [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
5948         [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
5949         [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
5950         [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
5951         [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
5952         [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
5953         [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
5954         [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
5955         [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
5956         [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
5957         [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
5958         [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
5959         [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
5960         [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
5961         [DEVLINK_ATTR_REGION_CHUNK_ADDR] = { .type = NLA_U64 },
5962         [DEVLINK_ATTR_REGION_CHUNK_LEN] = { .type = NLA_U64 },
5963         [DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },
5964         [DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },
5965         [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
5966         [DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
5967         [DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
5968         [DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING },
5969         [DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 },
5970         [DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING },
5971         [DEVLINK_ATTR_NETNS_PID] = { .type = NLA_U32 },
5972         [DEVLINK_ATTR_NETNS_FD] = { .type = NLA_U32 },
5973         [DEVLINK_ATTR_NETNS_ID] = { .type = NLA_U32 },
5974 };
5975
5976 static const struct genl_ops devlink_nl_ops[] = {
5977         {
5978                 .cmd = DEVLINK_CMD_GET,
5979                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5980                 .doit = devlink_nl_cmd_get_doit,
5981                 .dumpit = devlink_nl_cmd_get_dumpit,
5982                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5983                 /* can be retrieved by unprivileged users */
5984         },
5985         {
5986                 .cmd = DEVLINK_CMD_PORT_GET,
5987                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5988                 .doit = devlink_nl_cmd_port_get_doit,
5989                 .dumpit = devlink_nl_cmd_port_get_dumpit,
5990                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5991                 /* can be retrieved by unprivileged users */
5992         },
5993         {
5994                 .cmd = DEVLINK_CMD_PORT_SET,
5995                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5996                 .doit = devlink_nl_cmd_port_set_doit,
5997                 .flags = GENL_ADMIN_PERM,
5998                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5999         },
6000         {
6001                 .cmd = DEVLINK_CMD_PORT_SPLIT,
6002                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6003                 .doit = devlink_nl_cmd_port_split_doit,
6004                 .flags = GENL_ADMIN_PERM,
6005                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6006                                   DEVLINK_NL_FLAG_NO_LOCK,
6007         },
6008         {
6009                 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
6010                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6011                 .doit = devlink_nl_cmd_port_unsplit_doit,
6012                 .flags = GENL_ADMIN_PERM,
6013                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6014                                   DEVLINK_NL_FLAG_NO_LOCK,
6015         },
6016         {
6017                 .cmd = DEVLINK_CMD_SB_GET,
6018                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6019                 .doit = devlink_nl_cmd_sb_get_doit,
6020                 .dumpit = devlink_nl_cmd_sb_get_dumpit,
6021                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6022                                   DEVLINK_NL_FLAG_NEED_SB,
6023                 /* can be retrieved by unprivileged users */
6024         },
6025         {
6026                 .cmd = DEVLINK_CMD_SB_POOL_GET,
6027                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6028                 .doit = devlink_nl_cmd_sb_pool_get_doit,
6029                 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
6030                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6031                                   DEVLINK_NL_FLAG_NEED_SB,
6032                 /* can be retrieved by unprivileged users */
6033         },
6034         {
6035                 .cmd = DEVLINK_CMD_SB_POOL_SET,
6036                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6037                 .doit = devlink_nl_cmd_sb_pool_set_doit,
6038                 .flags = GENL_ADMIN_PERM,
6039                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6040                                   DEVLINK_NL_FLAG_NEED_SB,
6041         },
6042         {
6043                 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
6044                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6045                 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
6046                 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
6047                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6048                                   DEVLINK_NL_FLAG_NEED_SB,
6049                 /* can be retrieved by unprivileged users */
6050         },
6051         {
6052                 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
6053                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6054                 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
6055                 .flags = GENL_ADMIN_PERM,
6056                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6057                                   DEVLINK_NL_FLAG_NEED_SB,
6058         },
6059         {
6060                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
6061                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6062                 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
6063                 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
6064                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6065                                   DEVLINK_NL_FLAG_NEED_SB,
6066                 /* can be retrieved by unprivileged users */
6067         },
6068         {
6069                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
6070                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6071                 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
6072                 .flags = GENL_ADMIN_PERM,
6073                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6074                                   DEVLINK_NL_FLAG_NEED_SB,
6075         },
6076         {
6077                 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
6078                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6079                 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
6080                 .flags = GENL_ADMIN_PERM,
6081                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6082                                   DEVLINK_NL_FLAG_NEED_SB,
6083         },
6084         {
6085                 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
6086                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6087                 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
6088                 .flags = GENL_ADMIN_PERM,
6089                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6090                                   DEVLINK_NL_FLAG_NEED_SB,
6091         },
6092         {
6093                 .cmd = DEVLINK_CMD_ESWITCH_GET,
6094                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6095                 .doit = devlink_nl_cmd_eswitch_get_doit,
6096                 .flags = GENL_ADMIN_PERM,
6097                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6098         },
6099         {
6100                 .cmd = DEVLINK_CMD_ESWITCH_SET,
6101                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6102                 .doit = devlink_nl_cmd_eswitch_set_doit,
6103                 .flags = GENL_ADMIN_PERM,
6104                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6105                                   DEVLINK_NL_FLAG_NO_LOCK,
6106         },
6107         {
6108                 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
6109                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6110                 .doit = devlink_nl_cmd_dpipe_table_get,
6111                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6112                 /* can be retrieved by unprivileged users */
6113         },
6114         {
6115                 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
6116                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6117                 .doit = devlink_nl_cmd_dpipe_entries_get,
6118                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6119                 /* can be retrieved by unprivileged users */
6120         },
6121         {
6122                 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
6123                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6124                 .doit = devlink_nl_cmd_dpipe_headers_get,
6125                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6126                 /* can be retrieved by unprivileged users */
6127         },
6128         {
6129                 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
6130                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6131                 .doit = devlink_nl_cmd_dpipe_table_counters_set,
6132                 .flags = GENL_ADMIN_PERM,
6133                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6134         },
6135         {
6136                 .cmd = DEVLINK_CMD_RESOURCE_SET,
6137                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6138                 .doit = devlink_nl_cmd_resource_set,
6139                 .flags = GENL_ADMIN_PERM,
6140                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6141         },
6142         {
6143                 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
6144                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6145                 .doit = devlink_nl_cmd_resource_dump,
6146                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6147                 /* can be retrieved by unprivileged users */
6148         },
6149         {
6150                 .cmd = DEVLINK_CMD_RELOAD,
6151                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6152                 .doit = devlink_nl_cmd_reload,
6153                 .flags = GENL_ADMIN_PERM,
6154                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6155                                   DEVLINK_NL_FLAG_NO_LOCK,
6156         },
6157         {
6158                 .cmd = DEVLINK_CMD_PARAM_GET,
6159                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6160                 .doit = devlink_nl_cmd_param_get_doit,
6161                 .dumpit = devlink_nl_cmd_param_get_dumpit,
6162                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6163                 /* can be retrieved by unprivileged users */
6164         },
6165         {
6166                 .cmd = DEVLINK_CMD_PARAM_SET,
6167                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6168                 .doit = devlink_nl_cmd_param_set_doit,
6169                 .flags = GENL_ADMIN_PERM,
6170                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6171         },
6172         {
6173                 .cmd = DEVLINK_CMD_PORT_PARAM_GET,
6174                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6175                 .doit = devlink_nl_cmd_port_param_get_doit,
6176                 .dumpit = devlink_nl_cmd_port_param_get_dumpit,
6177                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6178                 /* can be retrieved by unprivileged users */
6179         },
6180         {
6181                 .cmd = DEVLINK_CMD_PORT_PARAM_SET,
6182                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6183                 .doit = devlink_nl_cmd_port_param_set_doit,
6184                 .flags = GENL_ADMIN_PERM,
6185                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6186         },
6187         {
6188                 .cmd = DEVLINK_CMD_REGION_GET,
6189                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6190                 .doit = devlink_nl_cmd_region_get_doit,
6191                 .dumpit = devlink_nl_cmd_region_get_dumpit,
6192                 .flags = GENL_ADMIN_PERM,
6193                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6194         },
6195         {
6196                 .cmd = DEVLINK_CMD_REGION_DEL,
6197                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6198                 .doit = devlink_nl_cmd_region_del,
6199                 .flags = GENL_ADMIN_PERM,
6200                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6201         },
6202         {
6203                 .cmd = DEVLINK_CMD_REGION_READ,
6204                 .validate = GENL_DONT_VALIDATE_STRICT |
6205                             GENL_DONT_VALIDATE_DUMP_STRICT,
6206                 .dumpit = devlink_nl_cmd_region_read_dumpit,
6207                 .flags = GENL_ADMIN_PERM,
6208                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6209         },
6210         {
6211                 .cmd = DEVLINK_CMD_INFO_GET,
6212                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6213                 .doit = devlink_nl_cmd_info_get_doit,
6214                 .dumpit = devlink_nl_cmd_info_get_dumpit,
6215                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6216                 /* can be retrieved by unprivileged users */
6217         },
6218         {
6219                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
6220                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6221                 .doit = devlink_nl_cmd_health_reporter_get_doit,
6222                 .dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
6223                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6224                                   DEVLINK_NL_FLAG_NO_LOCK,
6225                 /* can be retrieved by unprivileged users */
6226         },
6227         {
6228                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
6229                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6230                 .doit = devlink_nl_cmd_health_reporter_set_doit,
6231                 .flags = GENL_ADMIN_PERM,
6232                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6233                                   DEVLINK_NL_FLAG_NO_LOCK,
6234         },
6235         {
6236                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
6237                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6238                 .doit = devlink_nl_cmd_health_reporter_recover_doit,
6239                 .flags = GENL_ADMIN_PERM,
6240                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6241                                   DEVLINK_NL_FLAG_NO_LOCK,
6242         },
6243         {
6244                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
6245                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6246                 .doit = devlink_nl_cmd_health_reporter_diagnose_doit,
6247                 .flags = GENL_ADMIN_PERM,
6248                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6249                                   DEVLINK_NL_FLAG_NO_LOCK,
6250         },
6251         {
6252                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
6253                 .validate = GENL_DONT_VALIDATE_STRICT |
6254                             GENL_DONT_VALIDATE_DUMP_STRICT,
6255                 .dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
6256                 .flags = GENL_ADMIN_PERM,
6257                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6258                                   DEVLINK_NL_FLAG_NO_LOCK,
6259         },
6260         {
6261                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
6262                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6263                 .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
6264                 .flags = GENL_ADMIN_PERM,
6265                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6266                                   DEVLINK_NL_FLAG_NO_LOCK,
6267         },
6268         {
6269                 .cmd = DEVLINK_CMD_FLASH_UPDATE,
6270                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6271                 .doit = devlink_nl_cmd_flash_update,
6272                 .flags = GENL_ADMIN_PERM,
6273                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6274         },
6275         {
6276                 .cmd = DEVLINK_CMD_TRAP_GET,
6277                 .doit = devlink_nl_cmd_trap_get_doit,
6278                 .dumpit = devlink_nl_cmd_trap_get_dumpit,
6279                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6280                 /* can be retrieved by unprivileged users */
6281         },
6282         {
6283                 .cmd = DEVLINK_CMD_TRAP_SET,
6284                 .doit = devlink_nl_cmd_trap_set_doit,
6285                 .flags = GENL_ADMIN_PERM,
6286                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6287         },
6288         {
6289                 .cmd = DEVLINK_CMD_TRAP_GROUP_GET,
6290                 .doit = devlink_nl_cmd_trap_group_get_doit,
6291                 .dumpit = devlink_nl_cmd_trap_group_get_dumpit,
6292                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6293                 /* can be retrieved by unprivileged users */
6294         },
6295         {
6296                 .cmd = DEVLINK_CMD_TRAP_GROUP_SET,
6297                 .doit = devlink_nl_cmd_trap_group_set_doit,
6298                 .flags = GENL_ADMIN_PERM,
6299                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6300         },
6301 };
6302
6303 static struct genl_family devlink_nl_family __ro_after_init = {
6304         .name           = DEVLINK_GENL_NAME,
6305         .version        = DEVLINK_GENL_VERSION,
6306         .maxattr        = DEVLINK_ATTR_MAX,
6307         .policy = devlink_nl_policy,
6308         .netnsok        = true,
6309         .pre_doit       = devlink_nl_pre_doit,
6310         .post_doit      = devlink_nl_post_doit,
6311         .module         = THIS_MODULE,
6312         .ops            = devlink_nl_ops,
6313         .n_ops          = ARRAY_SIZE(devlink_nl_ops),
6314         .mcgrps         = devlink_nl_mcgrps,
6315         .n_mcgrps       = ARRAY_SIZE(devlink_nl_mcgrps),
6316 };
6317
6318 /**
6319  *      devlink_alloc - Allocate new devlink instance resources
6320  *
6321  *      @ops: ops
6322  *      @priv_size: size of user private data
6323  *
6324  *      Allocate new devlink instance resources, including devlink index
6325  *      and name.
6326  */
6327 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
6328 {
6329         struct devlink *devlink;
6330
6331         if (WARN_ON(!ops))
6332                 return NULL;
6333
6334         devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
6335         if (!devlink)
6336                 return NULL;
6337         devlink->ops = ops;
6338         __devlink_net_set(devlink, &init_net);
6339         INIT_LIST_HEAD(&devlink->port_list);
6340         INIT_LIST_HEAD(&devlink->sb_list);
6341         INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
6342         INIT_LIST_HEAD(&devlink->resource_list);
6343         INIT_LIST_HEAD(&devlink->param_list);
6344         INIT_LIST_HEAD(&devlink->region_list);
6345         INIT_LIST_HEAD(&devlink->reporter_list);
6346         INIT_LIST_HEAD(&devlink->trap_list);
6347         INIT_LIST_HEAD(&devlink->trap_group_list);
6348         mutex_init(&devlink->lock);
6349         mutex_init(&devlink->reporters_lock);
6350         return devlink;
6351 }
6352 EXPORT_SYMBOL_GPL(devlink_alloc);
6353
6354 /**
6355  *      devlink_register - Register devlink instance
6356  *
6357  *      @devlink: devlink
6358  *      @dev: parent device
6359  */
6360 int devlink_register(struct devlink *devlink, struct device *dev)
6361 {
6362         mutex_lock(&devlink_mutex);
6363         devlink->dev = dev;
6364         devlink->registered = true;
6365         list_add_tail(&devlink->list, &devlink_list);
6366         devlink_notify(devlink, DEVLINK_CMD_NEW);
6367         mutex_unlock(&devlink_mutex);
6368         return 0;
6369 }
6370 EXPORT_SYMBOL_GPL(devlink_register);
6371
6372 /**
6373  *      devlink_unregister - Unregister devlink instance
6374  *
6375  *      @devlink: devlink
6376  */
6377 void devlink_unregister(struct devlink *devlink)
6378 {
6379         mutex_lock(&devlink_mutex);
6380         WARN_ON(devlink_reload_supported(devlink) &&
6381                 devlink->reload_enabled);
6382         devlink_notify(devlink, DEVLINK_CMD_DEL);
6383         list_del(&devlink->list);
6384         mutex_unlock(&devlink_mutex);
6385 }
6386 EXPORT_SYMBOL_GPL(devlink_unregister);
6387
6388 /**
6389  *      devlink_reload_enable - Enable reload of devlink instance
6390  *
6391  *      @devlink: devlink
6392  *
6393  *      Should be called at end of device initialization
6394  *      process when reload operation is supported.
6395  */
6396 void devlink_reload_enable(struct devlink *devlink)
6397 {
6398         mutex_lock(&devlink_mutex);
6399         devlink->reload_enabled = true;
6400         mutex_unlock(&devlink_mutex);
6401 }
6402 EXPORT_SYMBOL_GPL(devlink_reload_enable);
6403
6404 /**
6405  *      devlink_reload_disable - Disable reload of devlink instance
6406  *
6407  *      @devlink: devlink
6408  *
6409  *      Should be called at the beginning of device cleanup
6410  *      process when reload operation is supported.
6411  */
6412 void devlink_reload_disable(struct devlink *devlink)
6413 {
6414         mutex_lock(&devlink_mutex);
6415         /* Mutex is taken which ensures that no reload operation is in
6416          * progress while setting up forbidded flag.
6417          */
6418         devlink->reload_enabled = false;
6419         mutex_unlock(&devlink_mutex);
6420 }
6421 EXPORT_SYMBOL_GPL(devlink_reload_disable);
6422
6423 /**
6424  *      devlink_free - Free devlink instance resources
6425  *
6426  *      @devlink: devlink
6427  */
6428 void devlink_free(struct devlink *devlink)
6429 {
6430         mutex_destroy(&devlink->reporters_lock);
6431         mutex_destroy(&devlink->lock);
6432         WARN_ON(!list_empty(&devlink->trap_group_list));
6433         WARN_ON(!list_empty(&devlink->trap_list));
6434         WARN_ON(!list_empty(&devlink->reporter_list));
6435         WARN_ON(!list_empty(&devlink->region_list));
6436         WARN_ON(!list_empty(&devlink->param_list));
6437         WARN_ON(!list_empty(&devlink->resource_list));
6438         WARN_ON(!list_empty(&devlink->dpipe_table_list));
6439         WARN_ON(!list_empty(&devlink->sb_list));
6440         WARN_ON(!list_empty(&devlink->port_list));
6441
6442         kfree(devlink);
6443 }
6444 EXPORT_SYMBOL_GPL(devlink_free);
6445
6446 static void devlink_port_type_warn(struct work_struct *work)
6447 {
6448         WARN(true, "Type was not set for devlink port.");
6449 }
6450
6451 static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
6452 {
6453         /* Ignore CPU and DSA flavours. */
6454         return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
6455                devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA;
6456 }
6457
6458 #define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600)
6459
6460 static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
6461 {
6462         if (!devlink_port_type_should_warn(devlink_port))
6463                 return;
6464         /* Schedule a work to WARN in case driver does not set port
6465          * type within timeout.
6466          */
6467         schedule_delayed_work(&devlink_port->type_warn_dw,
6468                               DEVLINK_PORT_TYPE_WARN_TIMEOUT);
6469 }
6470
6471 static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
6472 {
6473         if (!devlink_port_type_should_warn(devlink_port))
6474                 return;
6475         cancel_delayed_work_sync(&devlink_port->type_warn_dw);
6476 }
6477
6478 /**
6479  *      devlink_port_register - Register devlink port
6480  *
6481  *      @devlink: devlink
6482  *      @devlink_port: devlink port
6483  *      @port_index: driver-specific numerical identifier of the port
6484  *
6485  *      Register devlink port with provided port index. User can use
6486  *      any indexing, even hw-related one. devlink_port structure
6487  *      is convenient to be embedded inside user driver private structure.
6488  *      Note that the caller should take care of zeroing the devlink_port
6489  *      structure.
6490  */
6491 int devlink_port_register(struct devlink *devlink,
6492                           struct devlink_port *devlink_port,
6493                           unsigned int port_index)
6494 {
6495         mutex_lock(&devlink->lock);
6496         if (devlink_port_index_exists(devlink, port_index)) {
6497                 mutex_unlock(&devlink->lock);
6498                 return -EEXIST;
6499         }
6500         devlink_port->devlink = devlink;
6501         devlink_port->index = port_index;
6502         devlink_port->registered = true;
6503         spin_lock_init(&devlink_port->type_lock);
6504         list_add_tail(&devlink_port->list, &devlink->port_list);
6505         INIT_LIST_HEAD(&devlink_port->param_list);
6506         mutex_unlock(&devlink->lock);
6507         INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
6508         devlink_port_type_warn_schedule(devlink_port);
6509         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
6510         return 0;
6511 }
6512 EXPORT_SYMBOL_GPL(devlink_port_register);
6513
6514 /**
6515  *      devlink_port_unregister - Unregister devlink port
6516  *
6517  *      @devlink_port: devlink port
6518  */
6519 void devlink_port_unregister(struct devlink_port *devlink_port)
6520 {
6521         struct devlink *devlink = devlink_port->devlink;
6522
6523         devlink_port_type_warn_cancel(devlink_port);
6524         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
6525         mutex_lock(&devlink->lock);
6526         list_del(&devlink_port->list);
6527         mutex_unlock(&devlink->lock);
6528 }
6529 EXPORT_SYMBOL_GPL(devlink_port_unregister);
6530
6531 static void __devlink_port_type_set(struct devlink_port *devlink_port,
6532                                     enum devlink_port_type type,
6533                                     void *type_dev)
6534 {
6535         if (WARN_ON(!devlink_port->registered))
6536                 return;
6537         devlink_port_type_warn_cancel(devlink_port);
6538         spin_lock_bh(&devlink_port->type_lock);
6539         devlink_port->type = type;
6540         devlink_port->type_dev = type_dev;
6541         spin_unlock_bh(&devlink_port->type_lock);
6542         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
6543 }
6544
6545 /**
6546  *      devlink_port_type_eth_set - Set port type to Ethernet
6547  *
6548  *      @devlink_port: devlink port
6549  *      @netdev: related netdevice
6550  */
6551 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
6552                                struct net_device *netdev)
6553 {
6554         const struct net_device_ops *ops = netdev->netdev_ops;
6555
6556         /* If driver registers devlink port, it should set devlink port
6557          * attributes accordingly so the compat functions are called
6558          * and the original ops are not used.
6559          */
6560         if (ops->ndo_get_phys_port_name) {
6561                 /* Some drivers use the same set of ndos for netdevs
6562                  * that have devlink_port registered and also for
6563                  * those who don't. Make sure that ndo_get_phys_port_name
6564                  * returns -EOPNOTSUPP here in case it is defined.
6565                  * Warn if not.
6566                  */
6567                 char name[IFNAMSIZ];
6568                 int err;
6569
6570                 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
6571                 WARN_ON(err != -EOPNOTSUPP);
6572         }
6573         if (ops->ndo_get_port_parent_id) {
6574                 /* Some drivers use the same set of ndos for netdevs
6575                  * that have devlink_port registered and also for
6576                  * those who don't. Make sure that ndo_get_port_parent_id
6577                  * returns -EOPNOTSUPP here in case it is defined.
6578                  * Warn if not.
6579                  */
6580                 struct netdev_phys_item_id ppid;
6581                 int err;
6582
6583                 err = ops->ndo_get_port_parent_id(netdev, &ppid);
6584                 WARN_ON(err != -EOPNOTSUPP);
6585         }
6586         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, netdev);
6587 }
6588 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
6589
6590 /**
6591  *      devlink_port_type_ib_set - Set port type to InfiniBand
6592  *
6593  *      @devlink_port: devlink port
6594  *      @ibdev: related IB device
6595  */
6596 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
6597                               struct ib_device *ibdev)
6598 {
6599         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
6600 }
6601 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
6602
6603 /**
6604  *      devlink_port_type_clear - Clear port type
6605  *
6606  *      @devlink_port: devlink port
6607  */
6608 void devlink_port_type_clear(struct devlink_port *devlink_port)
6609 {
6610         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
6611         devlink_port_type_warn_schedule(devlink_port);
6612 }
6613 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
6614
6615 static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
6616                                     enum devlink_port_flavour flavour,
6617                                     const unsigned char *switch_id,
6618                                     unsigned char switch_id_len)
6619 {
6620         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6621
6622         if (WARN_ON(devlink_port->registered))
6623                 return -EEXIST;
6624         attrs->set = true;
6625         attrs->flavour = flavour;
6626         if (switch_id) {
6627                 attrs->switch_port = true;
6628                 if (WARN_ON(switch_id_len > MAX_PHYS_ITEM_ID_LEN))
6629                         switch_id_len = MAX_PHYS_ITEM_ID_LEN;
6630                 memcpy(attrs->switch_id.id, switch_id, switch_id_len);
6631                 attrs->switch_id.id_len = switch_id_len;
6632         } else {
6633                 attrs->switch_port = false;
6634         }
6635         return 0;
6636 }
6637
6638 /**
6639  *      devlink_port_attrs_set - Set port attributes
6640  *
6641  *      @devlink_port: devlink port
6642  *      @flavour: flavour of the port
6643  *      @port_number: number of the port that is facing user, for example
6644  *                    the front panel port number
6645  *      @split: indicates if this is split port
6646  *      @split_subport_number: if the port is split, this is the number
6647  *                             of subport.
6648  *      @switch_id: if the port is part of switch, this is buffer with ID,
6649  *                  otwerwise this is NULL
6650  *      @switch_id_len: length of the switch_id buffer
6651  */
6652 void devlink_port_attrs_set(struct devlink_port *devlink_port,
6653                             enum devlink_port_flavour flavour,
6654                             u32 port_number, bool split,
6655                             u32 split_subport_number,
6656                             const unsigned char *switch_id,
6657                             unsigned char switch_id_len)
6658 {
6659         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6660         int ret;
6661
6662         ret = __devlink_port_attrs_set(devlink_port, flavour,
6663                                        switch_id, switch_id_len);
6664         if (ret)
6665                 return;
6666         attrs->split = split;
6667         attrs->phys.port_number = port_number;
6668         attrs->phys.split_subport_number = split_subport_number;
6669 }
6670 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
6671
6672 /**
6673  *      devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
6674  *
6675  *      @devlink_port: devlink port
6676  *      @pf: associated PF for the devlink port instance
6677  *      @switch_id: if the port is part of switch, this is buffer with ID,
6678  *                  otherwise this is NULL
6679  *      @switch_id_len: length of the switch_id buffer
6680  */
6681 void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port,
6682                                    const unsigned char *switch_id,
6683                                    unsigned char switch_id_len, u16 pf)
6684 {
6685         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6686         int ret;
6687
6688         ret = __devlink_port_attrs_set(devlink_port,
6689                                        DEVLINK_PORT_FLAVOUR_PCI_PF,
6690                                        switch_id, switch_id_len);
6691         if (ret)
6692                 return;
6693
6694         attrs->pci_pf.pf = pf;
6695 }
6696 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
6697
6698 /**
6699  *      devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
6700  *
6701  *      @devlink_port: devlink port
6702  *      @pf: associated PF for the devlink port instance
6703  *      @vf: associated VF of a PF for the devlink port instance
6704  *      @switch_id: if the port is part of switch, this is buffer with ID,
6705  *                  otherwise this is NULL
6706  *      @switch_id_len: length of the switch_id buffer
6707  */
6708 void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port,
6709                                    const unsigned char *switch_id,
6710                                    unsigned char switch_id_len,
6711                                    u16 pf, u16 vf)
6712 {
6713         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6714         int ret;
6715
6716         ret = __devlink_port_attrs_set(devlink_port,
6717                                        DEVLINK_PORT_FLAVOUR_PCI_VF,
6718                                        switch_id, switch_id_len);
6719         if (ret)
6720                 return;
6721         attrs->pci_vf.pf = pf;
6722         attrs->pci_vf.vf = vf;
6723 }
6724 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
6725
6726 static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
6727                                              char *name, size_t len)
6728 {
6729         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6730         int n = 0;
6731
6732         if (!attrs->set)
6733                 return -EOPNOTSUPP;
6734
6735         switch (attrs->flavour) {
6736         case DEVLINK_PORT_FLAVOUR_PHYSICAL:
6737                 if (!attrs->split)
6738                         n = snprintf(name, len, "p%u", attrs->phys.port_number);
6739                 else
6740                         n = snprintf(name, len, "p%us%u",
6741                                      attrs->phys.port_number,
6742                                      attrs->phys.split_subport_number);
6743                 break;
6744         case DEVLINK_PORT_FLAVOUR_CPU:
6745         case DEVLINK_PORT_FLAVOUR_DSA:
6746                 /* As CPU and DSA ports do not have a netdevice associated
6747                  * case should not ever happen.
6748                  */
6749                 WARN_ON(1);
6750                 return -EINVAL;
6751         case DEVLINK_PORT_FLAVOUR_PCI_PF:
6752                 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
6753                 break;
6754         case DEVLINK_PORT_FLAVOUR_PCI_VF:
6755                 n = snprintf(name, len, "pf%uvf%u",
6756                              attrs->pci_vf.pf, attrs->pci_vf.vf);
6757                 break;
6758         }
6759
6760         if (n >= len)
6761                 return -EINVAL;
6762
6763         return 0;
6764 }
6765
6766 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
6767                         u32 size, u16 ingress_pools_count,
6768                         u16 egress_pools_count, u16 ingress_tc_count,
6769                         u16 egress_tc_count)
6770 {
6771         struct devlink_sb *devlink_sb;
6772         int err = 0;
6773
6774         mutex_lock(&devlink->lock);
6775         if (devlink_sb_index_exists(devlink, sb_index)) {
6776                 err = -EEXIST;
6777                 goto unlock;
6778         }
6779
6780         devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
6781         if (!devlink_sb) {
6782                 err = -ENOMEM;
6783                 goto unlock;
6784         }
6785         devlink_sb->index = sb_index;
6786         devlink_sb->size = size;
6787         devlink_sb->ingress_pools_count = ingress_pools_count;
6788         devlink_sb->egress_pools_count = egress_pools_count;
6789         devlink_sb->ingress_tc_count = ingress_tc_count;
6790         devlink_sb->egress_tc_count = egress_tc_count;
6791         list_add_tail(&devlink_sb->list, &devlink->sb_list);
6792 unlock:
6793         mutex_unlock(&devlink->lock);
6794         return err;
6795 }
6796 EXPORT_SYMBOL_GPL(devlink_sb_register);
6797
6798 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
6799 {
6800         struct devlink_sb *devlink_sb;
6801
6802         mutex_lock(&devlink->lock);
6803         devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
6804         WARN_ON(!devlink_sb);
6805         list_del(&devlink_sb->list);
6806         mutex_unlock(&devlink->lock);
6807         kfree(devlink_sb);
6808 }
6809 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
6810
6811 /**
6812  *      devlink_dpipe_headers_register - register dpipe headers
6813  *
6814  *      @devlink: devlink
6815  *      @dpipe_headers: dpipe header array
6816  *
6817  *      Register the headers supported by hardware.
6818  */
6819 int devlink_dpipe_headers_register(struct devlink *devlink,
6820                                    struct devlink_dpipe_headers *dpipe_headers)
6821 {
6822         mutex_lock(&devlink->lock);
6823         devlink->dpipe_headers = dpipe_headers;
6824         mutex_unlock(&devlink->lock);
6825         return 0;
6826 }
6827 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
6828
6829 /**
6830  *      devlink_dpipe_headers_unregister - unregister dpipe headers
6831  *
6832  *      @devlink: devlink
6833  *
6834  *      Unregister the headers supported by hardware.
6835  */
6836 void devlink_dpipe_headers_unregister(struct devlink *devlink)
6837 {
6838         mutex_lock(&devlink->lock);
6839         devlink->dpipe_headers = NULL;
6840         mutex_unlock(&devlink->lock);
6841 }
6842 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
6843
6844 /**
6845  *      devlink_dpipe_table_counter_enabled - check if counter allocation
6846  *                                            required
6847  *      @devlink: devlink
6848  *      @table_name: tables name
6849  *
6850  *      Used by driver to check if counter allocation is required.
6851  *      After counter allocation is turned on the table entries
6852  *      are updated to include counter statistics.
6853  *
6854  *      After that point on the driver must respect the counter
6855  *      state so that each entry added to the table is added
6856  *      with a counter.
6857  */
6858 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
6859                                          const char *table_name)
6860 {
6861         struct devlink_dpipe_table *table;
6862         bool enabled;
6863
6864         rcu_read_lock();
6865         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
6866                                          table_name, devlink);
6867         enabled = false;
6868         if (table)
6869                 enabled = table->counters_enabled;
6870         rcu_read_unlock();
6871         return enabled;
6872 }
6873 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
6874
6875 /**
6876  *      devlink_dpipe_table_register - register dpipe table
6877  *
6878  *      @devlink: devlink
6879  *      @table_name: table name
6880  *      @table_ops: table ops
6881  *      @priv: priv
6882  *      @counter_control_extern: external control for counters
6883  */
6884 int devlink_dpipe_table_register(struct devlink *devlink,
6885                                  const char *table_name,
6886                                  struct devlink_dpipe_table_ops *table_ops,
6887                                  void *priv, bool counter_control_extern)
6888 {
6889         struct devlink_dpipe_table *table;
6890         int err = 0;
6891
6892         if (WARN_ON(!table_ops->size_get))
6893                 return -EINVAL;
6894
6895         mutex_lock(&devlink->lock);
6896
6897         if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name,
6898                                      devlink)) {
6899                 err = -EEXIST;
6900                 goto unlock;
6901         }
6902
6903         table = kzalloc(sizeof(*table), GFP_KERNEL);
6904         if (!table) {
6905                 err = -ENOMEM;
6906                 goto unlock;
6907         }
6908
6909         table->name = table_name;
6910         table->table_ops = table_ops;
6911         table->priv = priv;
6912         table->counter_control_extern = counter_control_extern;
6913
6914         list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
6915 unlock:
6916         mutex_unlock(&devlink->lock);
6917         return err;
6918 }
6919 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
6920
6921 /**
6922  *      devlink_dpipe_table_unregister - unregister dpipe table
6923  *
6924  *      @devlink: devlink
6925  *      @table_name: table name
6926  */
6927 void devlink_dpipe_table_unregister(struct devlink *devlink,
6928                                     const char *table_name)
6929 {
6930         struct devlink_dpipe_table *table;
6931
6932         mutex_lock(&devlink->lock);
6933         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
6934                                          table_name, devlink);
6935         if (!table)
6936                 goto unlock;
6937         list_del_rcu(&table->list);
6938         mutex_unlock(&devlink->lock);
6939         kfree_rcu(table, rcu);
6940         return;
6941 unlock:
6942         mutex_unlock(&devlink->lock);
6943 }
6944 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
6945
6946 /**
6947  *      devlink_resource_register - devlink resource register
6948  *
6949  *      @devlink: devlink
6950  *      @resource_name: resource's name
6951  *      @resource_size: resource's size
6952  *      @resource_id: resource's id
6953  *      @parent_resource_id: resource's parent id
6954  *      @size_params: size parameters
6955  */
6956 int devlink_resource_register(struct devlink *devlink,
6957                               const char *resource_name,
6958                               u64 resource_size,
6959                               u64 resource_id,
6960                               u64 parent_resource_id,
6961                               const struct devlink_resource_size_params *size_params)
6962 {
6963         struct devlink_resource *resource;
6964         struct list_head *resource_list;
6965         bool top_hierarchy;
6966         int err = 0;
6967
6968         top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
6969
6970         mutex_lock(&devlink->lock);
6971         resource = devlink_resource_find(devlink, NULL, resource_id);
6972         if (resource) {
6973                 err = -EINVAL;
6974                 goto out;
6975         }
6976
6977         resource = kzalloc(sizeof(*resource), GFP_KERNEL);
6978         if (!resource) {
6979                 err = -ENOMEM;
6980                 goto out;
6981         }
6982
6983         if (top_hierarchy) {
6984                 resource_list = &devlink->resource_list;
6985         } else {
6986                 struct devlink_resource *parent_resource;
6987
6988                 parent_resource = devlink_resource_find(devlink, NULL,
6989                                                         parent_resource_id);
6990                 if (parent_resource) {
6991                         resource_list = &parent_resource->resource_list;
6992                         resource->parent = parent_resource;
6993                 } else {
6994                         kfree(resource);
6995                         err = -EINVAL;
6996                         goto out;
6997                 }
6998         }
6999
7000         resource->name = resource_name;
7001         resource->size = resource_size;
7002         resource->size_new = resource_size;
7003         resource->id = resource_id;
7004         resource->size_valid = true;
7005         memcpy(&resource->size_params, size_params,
7006                sizeof(resource->size_params));
7007         INIT_LIST_HEAD(&resource->resource_list);
7008         list_add_tail(&resource->list, resource_list);
7009 out:
7010         mutex_unlock(&devlink->lock);
7011         return err;
7012 }
7013 EXPORT_SYMBOL_GPL(devlink_resource_register);
7014
7015 /**
7016  *      devlink_resources_unregister - free all resources
7017  *
7018  *      @devlink: devlink
7019  *      @resource: resource
7020  */
7021 void devlink_resources_unregister(struct devlink *devlink,
7022                                   struct devlink_resource *resource)
7023 {
7024         struct devlink_resource *tmp, *child_resource;
7025         struct list_head *resource_list;
7026
7027         if (resource)
7028                 resource_list = &resource->resource_list;
7029         else
7030                 resource_list = &devlink->resource_list;
7031
7032         if (!resource)
7033                 mutex_lock(&devlink->lock);
7034
7035         list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
7036                 devlink_resources_unregister(devlink, child_resource);
7037                 list_del(&child_resource->list);
7038                 kfree(child_resource);
7039         }
7040
7041         if (!resource)
7042                 mutex_unlock(&devlink->lock);
7043 }
7044 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
7045
7046 /**
7047  *      devlink_resource_size_get - get and update size
7048  *
7049  *      @devlink: devlink
7050  *      @resource_id: the requested resource id
7051  *      @p_resource_size: ptr to update
7052  */
7053 int devlink_resource_size_get(struct devlink *devlink,
7054                               u64 resource_id,
7055                               u64 *p_resource_size)
7056 {
7057         struct devlink_resource *resource;
7058         int err = 0;
7059
7060         mutex_lock(&devlink->lock);
7061         resource = devlink_resource_find(devlink, NULL, resource_id);
7062         if (!resource) {
7063                 err = -EINVAL;
7064                 goto out;
7065         }
7066         *p_resource_size = resource->size_new;
7067         resource->size = resource->size_new;
7068 out:
7069         mutex_unlock(&devlink->lock);
7070         return err;
7071 }
7072 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
7073
7074 /**
7075  *      devlink_dpipe_table_resource_set - set the resource id
7076  *
7077  *      @devlink: devlink
7078  *      @table_name: table name
7079  *      @resource_id: resource id
7080  *      @resource_units: number of resource's units consumed per table's entry
7081  */
7082 int devlink_dpipe_table_resource_set(struct devlink *devlink,
7083                                      const char *table_name, u64 resource_id,
7084                                      u64 resource_units)
7085 {
7086         struct devlink_dpipe_table *table;
7087         int err = 0;
7088
7089         mutex_lock(&devlink->lock);
7090         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
7091                                          table_name, devlink);
7092         if (!table) {
7093                 err = -EINVAL;
7094                 goto out;
7095         }
7096         table->resource_id = resource_id;
7097         table->resource_units = resource_units;
7098         table->resource_valid = true;
7099 out:
7100         mutex_unlock(&devlink->lock);
7101         return err;
7102 }
7103 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
7104
7105 /**
7106  *      devlink_resource_occ_get_register - register occupancy getter
7107  *
7108  *      @devlink: devlink
7109  *      @resource_id: resource id
7110  *      @occ_get: occupancy getter callback
7111  *      @occ_get_priv: occupancy getter callback priv
7112  */
7113 void devlink_resource_occ_get_register(struct devlink *devlink,
7114                                        u64 resource_id,
7115                                        devlink_resource_occ_get_t *occ_get,
7116                                        void *occ_get_priv)
7117 {
7118         struct devlink_resource *resource;
7119
7120         mutex_lock(&devlink->lock);
7121         resource = devlink_resource_find(devlink, NULL, resource_id);
7122         if (WARN_ON(!resource))
7123                 goto out;
7124         WARN_ON(resource->occ_get);
7125
7126         resource->occ_get = occ_get;
7127         resource->occ_get_priv = occ_get_priv;
7128 out:
7129         mutex_unlock(&devlink->lock);
7130 }
7131 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
7132
7133 /**
7134  *      devlink_resource_occ_get_unregister - unregister occupancy getter
7135  *
7136  *      @devlink: devlink
7137  *      @resource_id: resource id
7138  */
7139 void devlink_resource_occ_get_unregister(struct devlink *devlink,
7140                                          u64 resource_id)
7141 {
7142         struct devlink_resource *resource;
7143
7144         mutex_lock(&devlink->lock);
7145         resource = devlink_resource_find(devlink, NULL, resource_id);
7146         if (WARN_ON(!resource))
7147                 goto out;
7148         WARN_ON(!resource->occ_get);
7149
7150         resource->occ_get = NULL;
7151         resource->occ_get_priv = NULL;
7152 out:
7153         mutex_unlock(&devlink->lock);
7154 }
7155 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
7156
7157 static int devlink_param_verify(const struct devlink_param *param)
7158 {
7159         if (!param || !param->name || !param->supported_cmodes)
7160                 return -EINVAL;
7161         if (param->generic)
7162                 return devlink_param_generic_verify(param);
7163         else
7164                 return devlink_param_driver_verify(param);
7165 }
7166
7167 static int __devlink_params_register(struct devlink *devlink,
7168                                      unsigned int port_index,
7169                                      struct list_head *param_list,
7170                                      const struct devlink_param *params,
7171                                      size_t params_count,
7172                                      enum devlink_command reg_cmd,
7173                                      enum devlink_command unreg_cmd)
7174 {
7175         const struct devlink_param *param = params;
7176         int i;
7177         int err;
7178
7179         mutex_lock(&devlink->lock);
7180         for (i = 0; i < params_count; i++, param++) {
7181                 err = devlink_param_verify(param);
7182                 if (err)
7183                         goto rollback;
7184
7185                 err = devlink_param_register_one(devlink, port_index,
7186                                                  param_list, param, reg_cmd);
7187                 if (err)
7188                         goto rollback;
7189         }
7190
7191         mutex_unlock(&devlink->lock);
7192         return 0;
7193
7194 rollback:
7195         if (!i)
7196                 goto unlock;
7197         for (param--; i > 0; i--, param--)
7198                 devlink_param_unregister_one(devlink, port_index, param_list,
7199                                              param, unreg_cmd);
7200 unlock:
7201         mutex_unlock(&devlink->lock);
7202         return err;
7203 }
7204
7205 static void __devlink_params_unregister(struct devlink *devlink,
7206                                         unsigned int port_index,
7207                                         struct list_head *param_list,
7208                                         const struct devlink_param *params,
7209                                         size_t params_count,
7210                                         enum devlink_command cmd)
7211 {
7212         const struct devlink_param *param = params;
7213         int i;
7214
7215         mutex_lock(&devlink->lock);
7216         for (i = 0; i < params_count; i++, param++)
7217                 devlink_param_unregister_one(devlink, 0, param_list, param,
7218                                              cmd);
7219         mutex_unlock(&devlink->lock);
7220 }
7221
7222 /**
7223  *      devlink_params_register - register configuration parameters
7224  *
7225  *      @devlink: devlink
7226  *      @params: configuration parameters array
7227  *      @params_count: number of parameters provided
7228  *
7229  *      Register the configuration parameters supported by the driver.
7230  */
7231 int devlink_params_register(struct devlink *devlink,
7232                             const struct devlink_param *params,
7233                             size_t params_count)
7234 {
7235         return __devlink_params_register(devlink, 0, &devlink->param_list,
7236                                          params, params_count,
7237                                          DEVLINK_CMD_PARAM_NEW,
7238                                          DEVLINK_CMD_PARAM_DEL);
7239 }
7240 EXPORT_SYMBOL_GPL(devlink_params_register);
7241
7242 /**
7243  *      devlink_params_unregister - unregister configuration parameters
7244  *      @devlink: devlink
7245  *      @params: configuration parameters to unregister
7246  *      @params_count: number of parameters provided
7247  */
7248 void devlink_params_unregister(struct devlink *devlink,
7249                                const struct devlink_param *params,
7250                                size_t params_count)
7251 {
7252         return __devlink_params_unregister(devlink, 0, &devlink->param_list,
7253                                            params, params_count,
7254                                            DEVLINK_CMD_PARAM_DEL);
7255 }
7256 EXPORT_SYMBOL_GPL(devlink_params_unregister);
7257
7258 /**
7259  *      devlink_params_publish - publish configuration parameters
7260  *
7261  *      @devlink: devlink
7262  *
7263  *      Publish previously registered configuration parameters.
7264  */
7265 void devlink_params_publish(struct devlink *devlink)
7266 {
7267         struct devlink_param_item *param_item;
7268
7269         list_for_each_entry(param_item, &devlink->param_list, list) {
7270                 if (param_item->published)
7271                         continue;
7272                 param_item->published = true;
7273                 devlink_param_notify(devlink, 0, param_item,
7274                                      DEVLINK_CMD_PARAM_NEW);
7275         }
7276 }
7277 EXPORT_SYMBOL_GPL(devlink_params_publish);
7278
7279 /**
7280  *      devlink_params_unpublish - unpublish configuration parameters
7281  *
7282  *      @devlink: devlink
7283  *
7284  *      Unpublish previously registered configuration parameters.
7285  */
7286 void devlink_params_unpublish(struct devlink *devlink)
7287 {
7288         struct devlink_param_item *param_item;
7289
7290         list_for_each_entry(param_item, &devlink->param_list, list) {
7291                 if (!param_item->published)
7292                         continue;
7293                 param_item->published = false;
7294                 devlink_param_notify(devlink, 0, param_item,
7295                                      DEVLINK_CMD_PARAM_DEL);
7296         }
7297 }
7298 EXPORT_SYMBOL_GPL(devlink_params_unpublish);
7299
7300 /**
7301  *      devlink_port_params_register - register port configuration parameters
7302  *
7303  *      @devlink_port: devlink port
7304  *      @params: configuration parameters array
7305  *      @params_count: number of parameters provided
7306  *
7307  *      Register the configuration parameters supported by the port.
7308  */
7309 int devlink_port_params_register(struct devlink_port *devlink_port,
7310                                  const struct devlink_param *params,
7311                                  size_t params_count)
7312 {
7313         return __devlink_params_register(devlink_port->devlink,
7314                                          devlink_port->index,
7315                                          &devlink_port->param_list, params,
7316                                          params_count,
7317                                          DEVLINK_CMD_PORT_PARAM_NEW,
7318                                          DEVLINK_CMD_PORT_PARAM_DEL);
7319 }
7320 EXPORT_SYMBOL_GPL(devlink_port_params_register);
7321
7322 /**
7323  *      devlink_port_params_unregister - unregister port configuration
7324  *      parameters
7325  *
7326  *      @devlink_port: devlink port
7327  *      @params: configuration parameters array
7328  *      @params_count: number of parameters provided
7329  */
7330 void devlink_port_params_unregister(struct devlink_port *devlink_port,
7331                                     const struct devlink_param *params,
7332                                     size_t params_count)
7333 {
7334         return __devlink_params_unregister(devlink_port->devlink,
7335                                            devlink_port->index,
7336                                            &devlink_port->param_list,
7337                                            params, params_count,
7338                                            DEVLINK_CMD_PORT_PARAM_DEL);
7339 }
7340 EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
7341
7342 static int
7343 __devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
7344                                      union devlink_param_value *init_val)
7345 {
7346         struct devlink_param_item *param_item;
7347
7348         param_item = devlink_param_find_by_id(param_list, param_id);
7349         if (!param_item)
7350                 return -EINVAL;
7351
7352         if (!param_item->driverinit_value_valid ||
7353             !devlink_param_cmode_is_supported(param_item->param,
7354                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
7355                 return -EOPNOTSUPP;
7356
7357         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
7358                 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
7359         else
7360                 *init_val = param_item->driverinit_value;
7361
7362         return 0;
7363 }
7364
7365 static int
7366 __devlink_param_driverinit_value_set(struct devlink *devlink,
7367                                      unsigned int port_index,
7368                                      struct list_head *param_list, u32 param_id,
7369                                      union devlink_param_value init_val,
7370                                      enum devlink_command cmd)
7371 {
7372         struct devlink_param_item *param_item;
7373
7374         param_item = devlink_param_find_by_id(param_list, param_id);
7375         if (!param_item)
7376                 return -EINVAL;
7377
7378         if (!devlink_param_cmode_is_supported(param_item->param,
7379                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
7380                 return -EOPNOTSUPP;
7381
7382         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
7383                 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
7384         else
7385                 param_item->driverinit_value = init_val;
7386         param_item->driverinit_value_valid = true;
7387
7388         devlink_param_notify(devlink, port_index, param_item, cmd);
7389         return 0;
7390 }
7391
7392 /**
7393  *      devlink_param_driverinit_value_get - get configuration parameter
7394  *                                           value for driver initializing
7395  *
7396  *      @devlink: devlink
7397  *      @param_id: parameter ID
7398  *      @init_val: value of parameter in driverinit configuration mode
7399  *
7400  *      This function should be used by the driver to get driverinit
7401  *      configuration for initialization after reload command.
7402  */
7403 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
7404                                        union devlink_param_value *init_val)
7405 {
7406         if (!devlink_reload_supported(devlink))
7407                 return -EOPNOTSUPP;
7408
7409         return __devlink_param_driverinit_value_get(&devlink->param_list,
7410                                                     param_id, init_val);
7411 }
7412 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
7413
7414 /**
7415  *      devlink_param_driverinit_value_set - set value of configuration
7416  *                                           parameter for driverinit
7417  *                                           configuration mode
7418  *
7419  *      @devlink: devlink
7420  *      @param_id: parameter ID
7421  *      @init_val: value of parameter to set for driverinit configuration mode
7422  *
7423  *      This function should be used by the driver to set driverinit
7424  *      configuration mode default value.
7425  */
7426 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
7427                                        union devlink_param_value init_val)
7428 {
7429         return __devlink_param_driverinit_value_set(devlink, 0,
7430                                                     &devlink->param_list,
7431                                                     param_id, init_val,
7432                                                     DEVLINK_CMD_PARAM_NEW);
7433 }
7434 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
7435
7436 /**
7437  *      devlink_port_param_driverinit_value_get - get configuration parameter
7438  *                                              value for driver initializing
7439  *
7440  *      @devlink_port: devlink_port
7441  *      @param_id: parameter ID
7442  *      @init_val: value of parameter in driverinit configuration mode
7443  *
7444  *      This function should be used by the driver to get driverinit
7445  *      configuration for initialization after reload command.
7446  */
7447 int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port,
7448                                             u32 param_id,
7449                                             union devlink_param_value *init_val)
7450 {
7451         struct devlink *devlink = devlink_port->devlink;
7452
7453         if (!devlink_reload_supported(devlink))
7454                 return -EOPNOTSUPP;
7455
7456         return __devlink_param_driverinit_value_get(&devlink_port->param_list,
7457                                                     param_id, init_val);
7458 }
7459 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get);
7460
7461 /**
7462  *     devlink_port_param_driverinit_value_set - set value of configuration
7463  *                                               parameter for driverinit
7464  *                                               configuration mode
7465  *
7466  *     @devlink_port: devlink_port
7467  *     @param_id: parameter ID
7468  *     @init_val: value of parameter to set for driverinit configuration mode
7469  *
7470  *     This function should be used by the driver to set driverinit
7471  *     configuration mode default value.
7472  */
7473 int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
7474                                             u32 param_id,
7475                                             union devlink_param_value init_val)
7476 {
7477         return __devlink_param_driverinit_value_set(devlink_port->devlink,
7478                                                     devlink_port->index,
7479                                                     &devlink_port->param_list,
7480                                                     param_id, init_val,
7481                                                     DEVLINK_CMD_PORT_PARAM_NEW);
7482 }
7483 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
7484
7485 /**
7486  *      devlink_param_value_changed - notify devlink on a parameter's value
7487  *                                    change. Should be called by the driver
7488  *                                    right after the change.
7489  *
7490  *      @devlink: devlink
7491  *      @param_id: parameter ID
7492  *
7493  *      This function should be used by the driver to notify devlink on value
7494  *      change, excluding driverinit configuration mode.
7495  *      For driverinit configuration mode driver should use the function
7496  */
7497 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
7498 {
7499         struct devlink_param_item *param_item;
7500
7501         param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
7502         WARN_ON(!param_item);
7503
7504         devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
7505 }
7506 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
7507
7508 /**
7509  *     devlink_port_param_value_changed - notify devlink on a parameter's value
7510  *                                      change. Should be called by the driver
7511  *                                      right after the change.
7512  *
7513  *     @devlink_port: devlink_port
7514  *     @param_id: parameter ID
7515  *
7516  *     This function should be used by the driver to notify devlink on value
7517  *     change, excluding driverinit configuration mode.
7518  *     For driverinit configuration mode driver should use the function
7519  *     devlink_port_param_driverinit_value_set() instead.
7520  */
7521 void devlink_port_param_value_changed(struct devlink_port *devlink_port,
7522                                       u32 param_id)
7523 {
7524         struct devlink_param_item *param_item;
7525
7526         param_item = devlink_param_find_by_id(&devlink_port->param_list,
7527                                               param_id);
7528         WARN_ON(!param_item);
7529
7530         devlink_param_notify(devlink_port->devlink, devlink_port->index,
7531                              param_item, DEVLINK_CMD_PORT_PARAM_NEW);
7532 }
7533 EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
7534
7535 /**
7536  *      devlink_param_value_str_fill - Safely fill-up the string preventing
7537  *                                     from overflow of the preallocated buffer
7538  *
7539  *      @dst_val: destination devlink_param_value
7540  *      @src: source buffer
7541  */
7542 void devlink_param_value_str_fill(union devlink_param_value *dst_val,
7543                                   const char *src)
7544 {
7545         size_t len;
7546
7547         len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
7548         WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
7549 }
7550 EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
7551
7552 /**
7553  *      devlink_region_create - create a new address region
7554  *
7555  *      @devlink: devlink
7556  *      @region_name: region name
7557  *      @region_max_snapshots: Maximum supported number of snapshots for region
7558  *      @region_size: size of region
7559  */
7560 struct devlink_region *devlink_region_create(struct devlink *devlink,
7561                                              const char *region_name,
7562                                              u32 region_max_snapshots,
7563                                              u64 region_size)
7564 {
7565         struct devlink_region *region;
7566         int err = 0;
7567
7568         mutex_lock(&devlink->lock);
7569
7570         if (devlink_region_get_by_name(devlink, region_name)) {
7571                 err = -EEXIST;
7572                 goto unlock;
7573         }
7574
7575         region = kzalloc(sizeof(*region), GFP_KERNEL);
7576         if (!region) {
7577                 err = -ENOMEM;
7578                 goto unlock;
7579         }
7580
7581         region->devlink = devlink;
7582         region->max_snapshots = region_max_snapshots;
7583         region->name = region_name;
7584         region->size = region_size;
7585         INIT_LIST_HEAD(&region->snapshot_list);
7586         list_add_tail(&region->list, &devlink->region_list);
7587         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
7588
7589         mutex_unlock(&devlink->lock);
7590         return region;
7591
7592 unlock:
7593         mutex_unlock(&devlink->lock);
7594         return ERR_PTR(err);
7595 }
7596 EXPORT_SYMBOL_GPL(devlink_region_create);
7597
7598 /**
7599  *      devlink_region_destroy - destroy address region
7600  *
7601  *      @region: devlink region to destroy
7602  */
7603 void devlink_region_destroy(struct devlink_region *region)
7604 {
7605         struct devlink *devlink = region->devlink;
7606         struct devlink_snapshot *snapshot, *ts;
7607
7608         mutex_lock(&devlink->lock);
7609
7610         /* Free all snapshots of region */
7611         list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
7612                 devlink_region_snapshot_del(region, snapshot);
7613
7614         list_del(&region->list);
7615
7616         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
7617         mutex_unlock(&devlink->lock);
7618         kfree(region);
7619 }
7620 EXPORT_SYMBOL_GPL(devlink_region_destroy);
7621
7622 /**
7623  *      devlink_region_snapshot_id_get - get snapshot ID
7624  *
7625  *      This callback should be called when adding a new snapshot,
7626  *      Driver should use the same id for multiple snapshots taken
7627  *      on multiple regions at the same time/by the same trigger.
7628  *
7629  *      @devlink: devlink
7630  */
7631 u32 devlink_region_snapshot_id_get(struct devlink *devlink)
7632 {
7633         u32 id;
7634
7635         mutex_lock(&devlink->lock);
7636         id = ++devlink->snapshot_id;
7637         mutex_unlock(&devlink->lock);
7638
7639         return id;
7640 }
7641 EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_get);
7642
7643 /**
7644  *      devlink_region_snapshot_create - create a new snapshot
7645  *      This will add a new snapshot of a region. The snapshot
7646  *      will be stored on the region struct and can be accessed
7647  *      from devlink. This is useful for future analyses of snapshots.
7648  *      Multiple snapshots can be created on a region.
7649  *      The @snapshot_id should be obtained using the getter function.
7650  *
7651  *      @region: devlink region of the snapshot
7652  *      @data: snapshot data
7653  *      @snapshot_id: snapshot id to be created
7654  *      @data_destructor: pointer to destructor function to free data
7655  */
7656 int devlink_region_snapshot_create(struct devlink_region *region,
7657                                    u8 *data, u32 snapshot_id,
7658                                    devlink_snapshot_data_dest_t *data_destructor)
7659 {
7660         struct devlink *devlink = region->devlink;
7661         struct devlink_snapshot *snapshot;
7662         int err;
7663
7664         mutex_lock(&devlink->lock);
7665
7666         /* check if region can hold one more snapshot */
7667         if (region->cur_snapshots == region->max_snapshots) {
7668                 err = -ENOMEM;
7669                 goto unlock;
7670         }
7671
7672         if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
7673                 err = -EEXIST;
7674                 goto unlock;
7675         }
7676
7677         snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
7678         if (!snapshot) {
7679                 err = -ENOMEM;
7680                 goto unlock;
7681         }
7682
7683         snapshot->id = snapshot_id;
7684         snapshot->region = region;
7685         snapshot->data = data;
7686         snapshot->data_destructor = data_destructor;
7687
7688         list_add_tail(&snapshot->list, &region->snapshot_list);
7689
7690         region->cur_snapshots++;
7691
7692         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
7693         mutex_unlock(&devlink->lock);
7694         return 0;
7695
7696 unlock:
7697         mutex_unlock(&devlink->lock);
7698         return err;
7699 }
7700 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
7701
7702 #define DEVLINK_TRAP(_id, _type)                                              \
7703         {                                                                     \
7704                 .type = DEVLINK_TRAP_TYPE_##_type,                            \
7705                 .id = DEVLINK_TRAP_GENERIC_ID_##_id,                          \
7706                 .name = DEVLINK_TRAP_GENERIC_NAME_##_id,                      \
7707         }
7708
7709 static const struct devlink_trap devlink_trap_generic[] = {
7710         DEVLINK_TRAP(SMAC_MC, DROP),
7711         DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
7712         DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
7713         DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
7714         DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
7715         DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
7716         DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
7717         DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
7718         DEVLINK_TRAP(TAIL_DROP, DROP),
7719         DEVLINK_TRAP(NON_IP_PACKET, DROP),
7720         DEVLINK_TRAP(UC_DIP_MC_DMAC, DROP),
7721         DEVLINK_TRAP(DIP_LB, DROP),
7722         DEVLINK_TRAP(SIP_MC, DROP),
7723         DEVLINK_TRAP(SIP_LB, DROP),
7724         DEVLINK_TRAP(CORRUPTED_IP_HDR, DROP),
7725         DEVLINK_TRAP(IPV4_SIP_BC, DROP),
7726         DEVLINK_TRAP(IPV6_MC_DIP_RESERVED_SCOPE, DROP),
7727         DEVLINK_TRAP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, DROP),
7728         DEVLINK_TRAP(MTU_ERROR, EXCEPTION),
7729         DEVLINK_TRAP(UNRESOLVED_NEIGH, EXCEPTION),
7730         DEVLINK_TRAP(RPF, EXCEPTION),
7731         DEVLINK_TRAP(REJECT_ROUTE, EXCEPTION),
7732         DEVLINK_TRAP(IPV4_LPM_UNICAST_MISS, EXCEPTION),
7733         DEVLINK_TRAP(IPV6_LPM_UNICAST_MISS, EXCEPTION),
7734         DEVLINK_TRAP(NON_ROUTABLE, DROP),
7735         DEVLINK_TRAP(DECAP_ERROR, EXCEPTION),
7736         DEVLINK_TRAP(OVERLAY_SMAC_MC, DROP),
7737 };
7738
7739 #define DEVLINK_TRAP_GROUP(_id)                                               \
7740         {                                                                     \
7741                 .id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id,                    \
7742                 .name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id,                \
7743         }
7744
7745 static const struct devlink_trap_group devlink_trap_group_generic[] = {
7746         DEVLINK_TRAP_GROUP(L2_DROPS),
7747         DEVLINK_TRAP_GROUP(L3_DROPS),
7748         DEVLINK_TRAP_GROUP(BUFFER_DROPS),
7749         DEVLINK_TRAP_GROUP(TUNNEL_DROPS),
7750 };
7751
7752 static int devlink_trap_generic_verify(const struct devlink_trap *trap)
7753 {
7754         if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
7755                 return -EINVAL;
7756
7757         if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
7758                 return -EINVAL;
7759
7760         if (trap->type != devlink_trap_generic[trap->id].type)
7761                 return -EINVAL;
7762
7763         return 0;
7764 }
7765
7766 static int devlink_trap_driver_verify(const struct devlink_trap *trap)
7767 {
7768         int i;
7769
7770         if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
7771                 return -EINVAL;
7772
7773         for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
7774                 if (!strcmp(trap->name, devlink_trap_generic[i].name))
7775                         return -EEXIST;
7776         }
7777
7778         return 0;
7779 }
7780
7781 static int devlink_trap_verify(const struct devlink_trap *trap)
7782 {
7783         if (!trap || !trap->name || !trap->group.name)
7784                 return -EINVAL;
7785
7786         if (trap->generic)
7787                 return devlink_trap_generic_verify(trap);
7788         else
7789                 return devlink_trap_driver_verify(trap);
7790 }
7791
7792 static int
7793 devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
7794 {
7795         if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
7796                 return -EINVAL;
7797
7798         if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
7799                 return -EINVAL;
7800
7801         return 0;
7802 }
7803
7804 static int
7805 devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
7806 {
7807         int i;
7808
7809         if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
7810                 return -EINVAL;
7811
7812         for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
7813                 if (!strcmp(group->name, devlink_trap_group_generic[i].name))
7814                         return -EEXIST;
7815         }
7816
7817         return 0;
7818 }
7819
7820 static int devlink_trap_group_verify(const struct devlink_trap_group *group)
7821 {
7822         if (group->generic)
7823                 return devlink_trap_group_generic_verify(group);
7824         else
7825                 return devlink_trap_group_driver_verify(group);
7826 }
7827
7828 static void
7829 devlink_trap_group_notify(struct devlink *devlink,
7830                           const struct devlink_trap_group_item *group_item,
7831                           enum devlink_command cmd)
7832 {
7833         struct sk_buff *msg;
7834         int err;
7835
7836         WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
7837                      cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
7838
7839         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7840         if (!msg)
7841                 return;
7842
7843         err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
7844                                          0);
7845         if (err) {
7846                 nlmsg_free(msg);
7847                 return;
7848         }
7849
7850         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
7851                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
7852 }
7853
7854 static struct devlink_trap_group_item *
7855 devlink_trap_group_item_create(struct devlink *devlink,
7856                                const struct devlink_trap_group *group)
7857 {
7858         struct devlink_trap_group_item *group_item;
7859         int err;
7860
7861         err = devlink_trap_group_verify(group);
7862         if (err)
7863                 return ERR_PTR(err);
7864
7865         group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
7866         if (!group_item)
7867                 return ERR_PTR(-ENOMEM);
7868
7869         group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
7870         if (!group_item->stats) {
7871                 err = -ENOMEM;
7872                 goto err_stats_alloc;
7873         }
7874
7875         group_item->group = group;
7876         refcount_set(&group_item->refcount, 1);
7877
7878         if (devlink->ops->trap_group_init) {
7879                 err = devlink->ops->trap_group_init(devlink, group);
7880                 if (err)
7881                         goto err_group_init;
7882         }
7883
7884         list_add_tail(&group_item->list, &devlink->trap_group_list);
7885         devlink_trap_group_notify(devlink, group_item,
7886                                   DEVLINK_CMD_TRAP_GROUP_NEW);
7887
7888         return group_item;
7889
7890 err_group_init:
7891         free_percpu(group_item->stats);
7892 err_stats_alloc:
7893         kfree(group_item);
7894         return ERR_PTR(err);
7895 }
7896
7897 static void
7898 devlink_trap_group_item_destroy(struct devlink *devlink,
7899                                 struct devlink_trap_group_item *group_item)
7900 {
7901         devlink_trap_group_notify(devlink, group_item,
7902                                   DEVLINK_CMD_TRAP_GROUP_DEL);
7903         list_del(&group_item->list);
7904         free_percpu(group_item->stats);
7905         kfree(group_item);
7906 }
7907
7908 static struct devlink_trap_group_item *
7909 devlink_trap_group_item_get(struct devlink *devlink,
7910                             const struct devlink_trap_group *group)
7911 {
7912         struct devlink_trap_group_item *group_item;
7913
7914         group_item = devlink_trap_group_item_lookup(devlink, group->name);
7915         if (group_item) {
7916                 refcount_inc(&group_item->refcount);
7917                 return group_item;
7918         }
7919
7920         return devlink_trap_group_item_create(devlink, group);
7921 }
7922
7923 static void
7924 devlink_trap_group_item_put(struct devlink *devlink,
7925                             struct devlink_trap_group_item *group_item)
7926 {
7927         if (!refcount_dec_and_test(&group_item->refcount))
7928                 return;
7929
7930         devlink_trap_group_item_destroy(devlink, group_item);
7931 }
7932
7933 static int
7934 devlink_trap_item_group_link(struct devlink *devlink,
7935                              struct devlink_trap_item *trap_item)
7936 {
7937         struct devlink_trap_group_item *group_item;
7938
7939         group_item = devlink_trap_group_item_get(devlink,
7940                                                  &trap_item->trap->group);
7941         if (IS_ERR(group_item))
7942                 return PTR_ERR(group_item);
7943
7944         trap_item->group_item = group_item;
7945
7946         return 0;
7947 }
7948
7949 static void
7950 devlink_trap_item_group_unlink(struct devlink *devlink,
7951                                struct devlink_trap_item *trap_item)
7952 {
7953         devlink_trap_group_item_put(devlink, trap_item->group_item);
7954 }
7955
7956 static void devlink_trap_notify(struct devlink *devlink,
7957                                 const struct devlink_trap_item *trap_item,
7958                                 enum devlink_command cmd)
7959 {
7960         struct sk_buff *msg;
7961         int err;
7962
7963         WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
7964                      cmd != DEVLINK_CMD_TRAP_DEL);
7965
7966         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7967         if (!msg)
7968                 return;
7969
7970         err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
7971         if (err) {
7972                 nlmsg_free(msg);
7973                 return;
7974         }
7975
7976         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
7977                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
7978 }
7979
7980 static int
7981 devlink_trap_register(struct devlink *devlink,
7982                       const struct devlink_trap *trap, void *priv)
7983 {
7984         struct devlink_trap_item *trap_item;
7985         int err;
7986
7987         if (devlink_trap_item_lookup(devlink, trap->name))
7988                 return -EEXIST;
7989
7990         trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
7991         if (!trap_item)
7992                 return -ENOMEM;
7993
7994         trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
7995         if (!trap_item->stats) {
7996                 err = -ENOMEM;
7997                 goto err_stats_alloc;
7998         }
7999
8000         trap_item->trap = trap;
8001         trap_item->action = trap->init_action;
8002         trap_item->priv = priv;
8003
8004         err = devlink_trap_item_group_link(devlink, trap_item);
8005         if (err)
8006                 goto err_group_link;
8007
8008         err = devlink->ops->trap_init(devlink, trap, trap_item);
8009         if (err)
8010                 goto err_trap_init;
8011
8012         list_add_tail(&trap_item->list, &devlink->trap_list);
8013         devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
8014
8015         return 0;
8016
8017 err_trap_init:
8018         devlink_trap_item_group_unlink(devlink, trap_item);
8019 err_group_link:
8020         free_percpu(trap_item->stats);
8021 err_stats_alloc:
8022         kfree(trap_item);
8023         return err;
8024 }
8025
8026 static void devlink_trap_unregister(struct devlink *devlink,
8027                                     const struct devlink_trap *trap)
8028 {
8029         struct devlink_trap_item *trap_item;
8030
8031         trap_item = devlink_trap_item_lookup(devlink, trap->name);
8032         if (WARN_ON_ONCE(!trap_item))
8033                 return;
8034
8035         devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
8036         list_del(&trap_item->list);
8037         if (devlink->ops->trap_fini)
8038                 devlink->ops->trap_fini(devlink, trap, trap_item);
8039         devlink_trap_item_group_unlink(devlink, trap_item);
8040         free_percpu(trap_item->stats);
8041         kfree(trap_item);
8042 }
8043
8044 static void devlink_trap_disable(struct devlink *devlink,
8045                                  const struct devlink_trap *trap)
8046 {
8047         struct devlink_trap_item *trap_item;
8048
8049         trap_item = devlink_trap_item_lookup(devlink, trap->name);
8050         if (WARN_ON_ONCE(!trap_item))
8051                 return;
8052
8053         devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP);
8054         trap_item->action = DEVLINK_TRAP_ACTION_DROP;
8055 }
8056
8057 /**
8058  * devlink_traps_register - Register packet traps with devlink.
8059  * @devlink: devlink.
8060  * @traps: Packet traps.
8061  * @traps_count: Count of provided packet traps.
8062  * @priv: Driver private information.
8063  *
8064  * Return: Non-zero value on failure.
8065  */
8066 int devlink_traps_register(struct devlink *devlink,
8067                            const struct devlink_trap *traps,
8068                            size_t traps_count, void *priv)
8069 {
8070         int i, err;
8071
8072         if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
8073                 return -EINVAL;
8074
8075         mutex_lock(&devlink->lock);
8076         for (i = 0; i < traps_count; i++) {
8077                 const struct devlink_trap *trap = &traps[i];
8078
8079                 err = devlink_trap_verify(trap);
8080                 if (err)
8081                         goto err_trap_verify;
8082
8083                 err = devlink_trap_register(devlink, trap, priv);
8084                 if (err)
8085                         goto err_trap_register;
8086         }
8087         mutex_unlock(&devlink->lock);
8088
8089         return 0;
8090
8091 err_trap_register:
8092 err_trap_verify:
8093         for (i--; i >= 0; i--)
8094                 devlink_trap_unregister(devlink, &traps[i]);
8095         mutex_unlock(&devlink->lock);
8096         return err;
8097 }
8098 EXPORT_SYMBOL_GPL(devlink_traps_register);
8099
8100 /**
8101  * devlink_traps_unregister - Unregister packet traps from devlink.
8102  * @devlink: devlink.
8103  * @traps: Packet traps.
8104  * @traps_count: Count of provided packet traps.
8105  */
8106 void devlink_traps_unregister(struct devlink *devlink,
8107                               const struct devlink_trap *traps,
8108                               size_t traps_count)
8109 {
8110         int i;
8111
8112         mutex_lock(&devlink->lock);
8113         /* Make sure we do not have any packets in-flight while unregistering
8114          * traps by disabling all of them and waiting for a grace period.
8115          */
8116         for (i = traps_count - 1; i >= 0; i--)
8117                 devlink_trap_disable(devlink, &traps[i]);
8118         synchronize_rcu();
8119         for (i = traps_count - 1; i >= 0; i--)
8120                 devlink_trap_unregister(devlink, &traps[i]);
8121         mutex_unlock(&devlink->lock);
8122 }
8123 EXPORT_SYMBOL_GPL(devlink_traps_unregister);
8124
8125 static void
8126 devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
8127                           size_t skb_len)
8128 {
8129         struct devlink_stats *stats;
8130
8131         stats = this_cpu_ptr(trap_stats);
8132         u64_stats_update_begin(&stats->syncp);
8133         stats->rx_bytes += skb_len;
8134         stats->rx_packets++;
8135         u64_stats_update_end(&stats->syncp);
8136 }
8137
8138 static void
8139 devlink_trap_report_metadata_fill(struct net_dm_hw_metadata *hw_metadata,
8140                                   const struct devlink_trap_item *trap_item,
8141                                   struct devlink_port *in_devlink_port)
8142 {
8143         struct devlink_trap_group_item *group_item = trap_item->group_item;
8144
8145         hw_metadata->trap_group_name = group_item->group->name;
8146         hw_metadata->trap_name = trap_item->trap->name;
8147
8148         spin_lock(&in_devlink_port->type_lock);
8149         if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
8150                 hw_metadata->input_dev = in_devlink_port->type_dev;
8151         spin_unlock(&in_devlink_port->type_lock);
8152 }
8153
8154 /**
8155  * devlink_trap_report - Report trapped packet to drop monitor.
8156  * @devlink: devlink.
8157  * @skb: Trapped packet.
8158  * @trap_ctx: Trap context.
8159  * @in_devlink_port: Input devlink port.
8160  */
8161 void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
8162                          void *trap_ctx, struct devlink_port *in_devlink_port)
8163 {
8164         struct devlink_trap_item *trap_item = trap_ctx;
8165         struct net_dm_hw_metadata hw_metadata = {};
8166
8167         devlink_trap_stats_update(trap_item->stats, skb->len);
8168         devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
8169
8170         devlink_trap_report_metadata_fill(&hw_metadata, trap_item,
8171                                           in_devlink_port);
8172         net_dm_hw_report(skb, &hw_metadata);
8173 }
8174 EXPORT_SYMBOL_GPL(devlink_trap_report);
8175
8176 /**
8177  * devlink_trap_ctx_priv - Trap context to driver private information.
8178  * @trap_ctx: Trap context.
8179  *
8180  * Return: Driver private information passed during registration.
8181  */
8182 void *devlink_trap_ctx_priv(void *trap_ctx)
8183 {
8184         struct devlink_trap_item *trap_item = trap_ctx;
8185
8186         return trap_item->priv;
8187 }
8188 EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
8189
8190 static void __devlink_compat_running_version(struct devlink *devlink,
8191                                              char *buf, size_t len)
8192 {
8193         const struct nlattr *nlattr;
8194         struct devlink_info_req req;
8195         struct sk_buff *msg;
8196         int rem, err;
8197
8198         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8199         if (!msg)
8200                 return;
8201
8202         req.msg = msg;
8203         err = devlink->ops->info_get(devlink, &req, NULL);
8204         if (err)
8205                 goto free_msg;
8206
8207         nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
8208                 const struct nlattr *kv;
8209                 int rem_kv;
8210
8211                 if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
8212                         continue;
8213
8214                 nla_for_each_nested(kv, nlattr, rem_kv) {
8215                         if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
8216                                 continue;
8217
8218                         strlcat(buf, nla_data(kv), len);
8219                         strlcat(buf, " ", len);
8220                 }
8221         }
8222 free_msg:
8223         nlmsg_free(msg);
8224 }
8225
8226 void devlink_compat_running_version(struct net_device *dev,
8227                                     char *buf, size_t len)
8228 {
8229         struct devlink *devlink;
8230
8231         dev_hold(dev);
8232         rtnl_unlock();
8233
8234         devlink = netdev_to_devlink(dev);
8235         if (!devlink || !devlink->ops->info_get)
8236                 goto out;
8237
8238         mutex_lock(&devlink->lock);
8239         __devlink_compat_running_version(devlink, buf, len);
8240         mutex_unlock(&devlink->lock);
8241
8242 out:
8243         rtnl_lock();
8244         dev_put(dev);
8245 }
8246
8247 int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
8248 {
8249         struct devlink *devlink;
8250         int ret;
8251
8252         dev_hold(dev);
8253         rtnl_unlock();
8254
8255         devlink = netdev_to_devlink(dev);
8256         if (!devlink || !devlink->ops->flash_update) {
8257                 ret = -EOPNOTSUPP;
8258                 goto out;
8259         }
8260
8261         mutex_lock(&devlink->lock);
8262         ret = devlink->ops->flash_update(devlink, file_name, NULL, NULL);
8263         mutex_unlock(&devlink->lock);
8264
8265 out:
8266         rtnl_lock();
8267         dev_put(dev);
8268
8269         return ret;
8270 }
8271
8272 int devlink_compat_phys_port_name_get(struct net_device *dev,
8273                                       char *name, size_t len)
8274 {
8275         struct devlink_port *devlink_port;
8276
8277         /* RTNL mutex is held here which ensures that devlink_port
8278          * instance cannot disappear in the middle. No need to take
8279          * any devlink lock as only permanent values are accessed.
8280          */
8281         ASSERT_RTNL();
8282
8283         devlink_port = netdev_to_devlink_port(dev);
8284         if (!devlink_port)
8285                 return -EOPNOTSUPP;
8286
8287         return __devlink_port_phys_port_name_get(devlink_port, name, len);
8288 }
8289
8290 int devlink_compat_switch_id_get(struct net_device *dev,
8291                                  struct netdev_phys_item_id *ppid)
8292 {
8293         struct devlink_port *devlink_port;
8294
8295         /* Caller must hold RTNL mutex or reference to dev, which ensures that
8296          * devlink_port instance cannot disappear in the middle. No need to take
8297          * any devlink lock as only permanent values are accessed.
8298          */
8299         devlink_port = netdev_to_devlink_port(dev);
8300         if (!devlink_port || !devlink_port->attrs.switch_port)
8301                 return -EOPNOTSUPP;
8302
8303         memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
8304
8305         return 0;
8306 }
8307
8308 static void __net_exit devlink_pernet_pre_exit(struct net *net)
8309 {
8310         struct devlink *devlink;
8311         int err;
8312
8313         /* In case network namespace is getting destroyed, reload
8314          * all devlink instances from this namespace into init_net.
8315          */
8316         mutex_lock(&devlink_mutex);
8317         list_for_each_entry(devlink, &devlink_list, list) {
8318                 if (net_eq(devlink_net(devlink), net)) {
8319                         if (WARN_ON(!devlink_reload_supported(devlink)))
8320                                 continue;
8321                         err = devlink_reload(devlink, &init_net, NULL);
8322                         if (err && err != -EOPNOTSUPP)
8323                                 pr_warn("Failed to reload devlink instance into init_net\n");
8324                 }
8325         }
8326         mutex_unlock(&devlink_mutex);
8327 }
8328
8329 static struct pernet_operations devlink_pernet_ops __net_initdata = {
8330         .pre_exit = devlink_pernet_pre_exit,
8331 };
8332
8333 static int __init devlink_init(void)
8334 {
8335         int err;
8336
8337         err = genl_register_family(&devlink_nl_family);
8338         if (err)
8339                 goto out;
8340         err = register_pernet_subsys(&devlink_pernet_ops);
8341
8342 out:
8343         WARN_ON(err);
8344         return err;
8345 }
8346
8347 subsys_initcall(devlink_init);