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)
2107 {
2108         struct devlink_dpipe_table *table;
2109
2110         list_for_each_entry_rcu(table, dpipe_tables, list) {
2111                 if (!strcmp(table->name, table_name))
2112                         return table;
2113         }
2114         return NULL;
2115 }
2116
2117 int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
2118 {
2119         struct devlink *devlink;
2120         int err;
2121
2122         err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb,
2123                                                dump_ctx->info);
2124         if (err)
2125                 return err;
2126
2127         dump_ctx->hdr = genlmsg_put(dump_ctx->skb,
2128                                     dump_ctx->info->snd_portid,
2129                                     dump_ctx->info->snd_seq,
2130                                     &devlink_nl_family, NLM_F_MULTI,
2131                                     dump_ctx->cmd);
2132         if (!dump_ctx->hdr)
2133                 goto nla_put_failure;
2134
2135         devlink = dump_ctx->info->user_ptr[0];
2136         if (devlink_nl_put_handle(dump_ctx->skb, devlink))
2137                 goto nla_put_failure;
2138         dump_ctx->nest = nla_nest_start_noflag(dump_ctx->skb,
2139                                                DEVLINK_ATTR_DPIPE_ENTRIES);
2140         if (!dump_ctx->nest)
2141                 goto nla_put_failure;
2142         return 0;
2143
2144 nla_put_failure:
2145         nlmsg_free(dump_ctx->skb);
2146         return -EMSGSIZE;
2147 }
2148 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare);
2149
2150 int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
2151                                    struct devlink_dpipe_entry *entry)
2152 {
2153         return devlink_dpipe_entry_put(dump_ctx->skb, entry);
2154 }
2155 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append);
2156
2157 int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
2158 {
2159         nla_nest_end(dump_ctx->skb, dump_ctx->nest);
2160         genlmsg_end(dump_ctx->skb, dump_ctx->hdr);
2161         return 0;
2162 }
2163 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close);
2164
2165 void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry)
2166
2167 {
2168         unsigned int value_count, value_index;
2169         struct devlink_dpipe_value *value;
2170
2171         value = entry->action_values;
2172         value_count = entry->action_values_count;
2173         for (value_index = 0; value_index < value_count; value_index++) {
2174                 kfree(value[value_index].value);
2175                 kfree(value[value_index].mask);
2176         }
2177
2178         value = entry->match_values;
2179         value_count = entry->match_values_count;
2180         for (value_index = 0; value_index < value_count; value_index++) {
2181                 kfree(value[value_index].value);
2182                 kfree(value[value_index].mask);
2183         }
2184 }
2185 EXPORT_SYMBOL(devlink_dpipe_entry_clear);
2186
2187 static int devlink_dpipe_entries_fill(struct genl_info *info,
2188                                       enum devlink_command cmd, int flags,
2189                                       struct devlink_dpipe_table *table)
2190 {
2191         struct devlink_dpipe_dump_ctx dump_ctx;
2192         struct nlmsghdr *nlh;
2193         int err;
2194
2195         dump_ctx.skb = NULL;
2196         dump_ctx.cmd = cmd;
2197         dump_ctx.info = info;
2198
2199         err = table->table_ops->entries_dump(table->priv,
2200                                              table->counters_enabled,
2201                                              &dump_ctx);
2202         if (err)
2203                 return err;
2204
2205 send_done:
2206         nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq,
2207                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2208         if (!nlh) {
2209                 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info);
2210                 if (err)
2211                         return err;
2212                 goto send_done;
2213         }
2214         return genlmsg_reply(dump_ctx.skb, info);
2215 }
2216
2217 static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
2218                                             struct genl_info *info)
2219 {
2220         struct devlink *devlink = info->user_ptr[0];
2221         struct devlink_dpipe_table *table;
2222         const char *table_name;
2223
2224         if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
2225                 return -EINVAL;
2226
2227         table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2228         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2229                                          table_name);
2230         if (!table)
2231                 return -EINVAL;
2232
2233         if (!table->table_ops->entries_dump)
2234                 return -EINVAL;
2235
2236         return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET,
2237                                           0, table);
2238 }
2239
2240 static int devlink_dpipe_fields_put(struct sk_buff *skb,
2241                                     const struct devlink_dpipe_header *header)
2242 {
2243         struct devlink_dpipe_field *field;
2244         struct nlattr *field_attr;
2245         int i;
2246
2247         for (i = 0; i < header->fields_count; i++) {
2248                 field = &header->fields[i];
2249                 field_attr = nla_nest_start_noflag(skb,
2250                                                    DEVLINK_ATTR_DPIPE_FIELD);
2251                 if (!field_attr)
2252                         return -EMSGSIZE;
2253                 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) ||
2254                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2255                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) ||
2256                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type))
2257                         goto nla_put_failure;
2258                 nla_nest_end(skb, field_attr);
2259         }
2260         return 0;
2261
2262 nla_put_failure:
2263         nla_nest_cancel(skb, field_attr);
2264         return -EMSGSIZE;
2265 }
2266
2267 static int devlink_dpipe_header_put(struct sk_buff *skb,
2268                                     struct devlink_dpipe_header *header)
2269 {
2270         struct nlattr *fields_attr, *header_attr;
2271         int err;
2272
2273         header_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADER);
2274         if (!header_attr)
2275                 return -EMSGSIZE;
2276
2277         if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) ||
2278             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2279             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2280                 goto nla_put_failure;
2281
2282         fields_attr = nla_nest_start_noflag(skb,
2283                                             DEVLINK_ATTR_DPIPE_HEADER_FIELDS);
2284         if (!fields_attr)
2285                 goto nla_put_failure;
2286
2287         err = devlink_dpipe_fields_put(skb, header);
2288         if (err) {
2289                 nla_nest_cancel(skb, fields_attr);
2290                 goto nla_put_failure;
2291         }
2292         nla_nest_end(skb, fields_attr);
2293         nla_nest_end(skb, header_attr);
2294         return 0;
2295
2296 nla_put_failure:
2297         err = -EMSGSIZE;
2298         nla_nest_cancel(skb, header_attr);
2299         return err;
2300 }
2301
2302 static int devlink_dpipe_headers_fill(struct genl_info *info,
2303                                       enum devlink_command cmd, int flags,
2304                                       struct devlink_dpipe_headers *
2305                                       dpipe_headers)
2306 {
2307         struct devlink *devlink = info->user_ptr[0];
2308         struct nlattr *headers_attr;
2309         struct sk_buff *skb = NULL;
2310         struct nlmsghdr *nlh;
2311         void *hdr;
2312         int i, j;
2313         int err;
2314
2315         i = 0;
2316 start_again:
2317         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2318         if (err)
2319                 return err;
2320
2321         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2322                           &devlink_nl_family, NLM_F_MULTI, cmd);
2323         if (!hdr) {
2324                 nlmsg_free(skb);
2325                 return -EMSGSIZE;
2326         }
2327
2328         if (devlink_nl_put_handle(skb, devlink))
2329                 goto nla_put_failure;
2330         headers_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADERS);
2331         if (!headers_attr)
2332                 goto nla_put_failure;
2333
2334         j = 0;
2335         for (; i < dpipe_headers->headers_count; i++) {
2336                 err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]);
2337                 if (err) {
2338                         if (!j)
2339                                 goto err_table_put;
2340                         break;
2341                 }
2342                 j++;
2343         }
2344         nla_nest_end(skb, headers_attr);
2345         genlmsg_end(skb, hdr);
2346         if (i != dpipe_headers->headers_count)
2347                 goto start_again;
2348
2349 send_done:
2350         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2351                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2352         if (!nlh) {
2353                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2354                 if (err)
2355                         return err;
2356                 goto send_done;
2357         }
2358         return genlmsg_reply(skb, info);
2359
2360 nla_put_failure:
2361         err = -EMSGSIZE;
2362 err_table_put:
2363         nlmsg_free(skb);
2364         return err;
2365 }
2366
2367 static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
2368                                             struct genl_info *info)
2369 {
2370         struct devlink *devlink = info->user_ptr[0];
2371
2372         if (!devlink->dpipe_headers)
2373                 return -EOPNOTSUPP;
2374         return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET,
2375                                           0, devlink->dpipe_headers);
2376 }
2377
2378 static int devlink_dpipe_table_counters_set(struct devlink *devlink,
2379                                             const char *table_name,
2380                                             bool enable)
2381 {
2382         struct devlink_dpipe_table *table;
2383
2384         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2385                                          table_name);
2386         if (!table)
2387                 return -EINVAL;
2388
2389         if (table->counter_control_extern)
2390                 return -EOPNOTSUPP;
2391
2392         if (!(table->counters_enabled ^ enable))
2393                 return 0;
2394
2395         table->counters_enabled = enable;
2396         if (table->table_ops->counters_set_update)
2397                 table->table_ops->counters_set_update(table->priv, enable);
2398         return 0;
2399 }
2400
2401 static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
2402                                                    struct genl_info *info)
2403 {
2404         struct devlink *devlink = info->user_ptr[0];
2405         const char *table_name;
2406         bool counters_enable;
2407
2408         if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] ||
2409             !info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED])
2410                 return -EINVAL;
2411
2412         table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2413         counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
2414
2415         return devlink_dpipe_table_counters_set(devlink, table_name,
2416                                                 counters_enable);
2417 }
2418
2419 static struct devlink_resource *
2420 devlink_resource_find(struct devlink *devlink,
2421                       struct devlink_resource *resource, u64 resource_id)
2422 {
2423         struct list_head *resource_list;
2424
2425         if (resource)
2426                 resource_list = &resource->resource_list;
2427         else
2428                 resource_list = &devlink->resource_list;
2429
2430         list_for_each_entry(resource, resource_list, list) {
2431                 struct devlink_resource *child_resource;
2432
2433                 if (resource->id == resource_id)
2434                         return resource;
2435
2436                 child_resource = devlink_resource_find(devlink, resource,
2437                                                        resource_id);
2438                 if (child_resource)
2439                         return child_resource;
2440         }
2441         return NULL;
2442 }
2443
2444 static void
2445 devlink_resource_validate_children(struct devlink_resource *resource)
2446 {
2447         struct devlink_resource *child_resource;
2448         bool size_valid = true;
2449         u64 parts_size = 0;
2450
2451         if (list_empty(&resource->resource_list))
2452                 goto out;
2453
2454         list_for_each_entry(child_resource, &resource->resource_list, list)
2455                 parts_size += child_resource->size_new;
2456
2457         if (parts_size > resource->size_new)
2458                 size_valid = false;
2459 out:
2460         resource->size_valid = size_valid;
2461 }
2462
2463 static int
2464 devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
2465                                struct netlink_ext_ack *extack)
2466 {
2467         u64 reminder;
2468         int err = 0;
2469
2470         if (size > resource->size_params.size_max) {
2471                 NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum");
2472                 err = -EINVAL;
2473         }
2474
2475         if (size < resource->size_params.size_min) {
2476                 NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum");
2477                 err = -EINVAL;
2478         }
2479
2480         div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
2481         if (reminder) {
2482                 NL_SET_ERR_MSG_MOD(extack, "Wrong granularity");
2483                 err = -EINVAL;
2484         }
2485
2486         return err;
2487 }
2488
2489 static int devlink_nl_cmd_resource_set(struct sk_buff *skb,
2490                                        struct genl_info *info)
2491 {
2492         struct devlink *devlink = info->user_ptr[0];
2493         struct devlink_resource *resource;
2494         u64 resource_id;
2495         u64 size;
2496         int err;
2497
2498         if (!info->attrs[DEVLINK_ATTR_RESOURCE_ID] ||
2499             !info->attrs[DEVLINK_ATTR_RESOURCE_SIZE])
2500                 return -EINVAL;
2501         resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);
2502
2503         resource = devlink_resource_find(devlink, NULL, resource_id);
2504         if (!resource)
2505                 return -EINVAL;
2506
2507         size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);
2508         err = devlink_resource_validate_size(resource, size, info->extack);
2509         if (err)
2510                 return err;
2511
2512         resource->size_new = size;
2513         devlink_resource_validate_children(resource);
2514         if (resource->parent)
2515                 devlink_resource_validate_children(resource->parent);
2516         return 0;
2517 }
2518
2519 static int
2520 devlink_resource_size_params_put(struct devlink_resource *resource,
2521                                  struct sk_buff *skb)
2522 {
2523         struct devlink_resource_size_params *size_params;
2524
2525         size_params = &resource->size_params;
2526         if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN,
2527                               size_params->size_granularity, DEVLINK_ATTR_PAD) ||
2528             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX,
2529                               size_params->size_max, DEVLINK_ATTR_PAD) ||
2530             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN,
2531                               size_params->size_min, DEVLINK_ATTR_PAD) ||
2532             nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))
2533                 return -EMSGSIZE;
2534         return 0;
2535 }
2536
2537 static int devlink_resource_occ_put(struct devlink_resource *resource,
2538                                     struct sk_buff *skb)
2539 {
2540         if (!resource->occ_get)
2541                 return 0;
2542         return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC,
2543                                  resource->occ_get(resource->occ_get_priv),
2544                                  DEVLINK_ATTR_PAD);
2545 }
2546
2547 static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
2548                                 struct devlink_resource *resource)
2549 {
2550         struct devlink_resource *child_resource;
2551         struct nlattr *child_resource_attr;
2552         struct nlattr *resource_attr;
2553
2554         resource_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE);
2555         if (!resource_attr)
2556                 return -EMSGSIZE;
2557
2558         if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
2559             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,
2560                               DEVLINK_ATTR_PAD) ||
2561             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,
2562                               DEVLINK_ATTR_PAD))
2563                 goto nla_put_failure;
2564         if (resource->size != resource->size_new)
2565                 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW,
2566                                   resource->size_new, DEVLINK_ATTR_PAD);
2567         if (devlink_resource_occ_put(resource, skb))
2568                 goto nla_put_failure;
2569         if (devlink_resource_size_params_put(resource, skb))
2570                 goto nla_put_failure;
2571         if (list_empty(&resource->resource_list))
2572                 goto out;
2573
2574         if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID,
2575                        resource->size_valid))
2576                 goto nla_put_failure;
2577
2578         child_resource_attr = nla_nest_start_noflag(skb,
2579                                                     DEVLINK_ATTR_RESOURCE_LIST);
2580         if (!child_resource_attr)
2581                 goto nla_put_failure;
2582
2583         list_for_each_entry(child_resource, &resource->resource_list, list) {
2584                 if (devlink_resource_put(devlink, skb, child_resource))
2585                         goto resource_put_failure;
2586         }
2587
2588         nla_nest_end(skb, child_resource_attr);
2589 out:
2590         nla_nest_end(skb, resource_attr);
2591         return 0;
2592
2593 resource_put_failure:
2594         nla_nest_cancel(skb, child_resource_attr);
2595 nla_put_failure:
2596         nla_nest_cancel(skb, resource_attr);
2597         return -EMSGSIZE;
2598 }
2599
2600 static int devlink_resource_fill(struct genl_info *info,
2601                                  enum devlink_command cmd, int flags)
2602 {
2603         struct devlink *devlink = info->user_ptr[0];
2604         struct devlink_resource *resource;
2605         struct nlattr *resources_attr;
2606         struct sk_buff *skb = NULL;
2607         struct nlmsghdr *nlh;
2608         bool incomplete;
2609         void *hdr;
2610         int i;
2611         int err;
2612
2613         resource = list_first_entry(&devlink->resource_list,
2614                                     struct devlink_resource, list);
2615 start_again:
2616         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2617         if (err)
2618                 return err;
2619
2620         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2621                           &devlink_nl_family, NLM_F_MULTI, cmd);
2622         if (!hdr) {
2623                 nlmsg_free(skb);
2624                 return -EMSGSIZE;
2625         }
2626
2627         if (devlink_nl_put_handle(skb, devlink))
2628                 goto nla_put_failure;
2629
2630         resources_attr = nla_nest_start_noflag(skb,
2631                                                DEVLINK_ATTR_RESOURCE_LIST);
2632         if (!resources_attr)
2633                 goto nla_put_failure;
2634
2635         incomplete = false;
2636         i = 0;
2637         list_for_each_entry_from(resource, &devlink->resource_list, list) {
2638                 err = devlink_resource_put(devlink, skb, resource);
2639                 if (err) {
2640                         if (!i)
2641                                 goto err_resource_put;
2642                         incomplete = true;
2643                         break;
2644                 }
2645                 i++;
2646         }
2647         nla_nest_end(skb, resources_attr);
2648         genlmsg_end(skb, hdr);
2649         if (incomplete)
2650                 goto start_again;
2651 send_done:
2652         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2653                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2654         if (!nlh) {
2655                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2656                 if (err)
2657                         return err;
2658                 goto send_done;
2659         }
2660         return genlmsg_reply(skb, info);
2661
2662 nla_put_failure:
2663         err = -EMSGSIZE;
2664 err_resource_put:
2665         nlmsg_free(skb);
2666         return err;
2667 }
2668
2669 static int devlink_nl_cmd_resource_dump(struct sk_buff *skb,
2670                                         struct genl_info *info)
2671 {
2672         struct devlink *devlink = info->user_ptr[0];
2673
2674         if (list_empty(&devlink->resource_list))
2675                 return -EOPNOTSUPP;
2676
2677         return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
2678 }
2679
2680 static int
2681 devlink_resources_validate(struct devlink *devlink,
2682                            struct devlink_resource *resource,
2683                            struct genl_info *info)
2684 {
2685         struct list_head *resource_list;
2686         int err = 0;
2687
2688         if (resource)
2689                 resource_list = &resource->resource_list;
2690         else
2691                 resource_list = &devlink->resource_list;
2692
2693         list_for_each_entry(resource, resource_list, list) {
2694                 if (!resource->size_valid)
2695                         return -EINVAL;
2696                 err = devlink_resources_validate(devlink, resource, info);
2697                 if (err)
2698                         return err;
2699         }
2700         return err;
2701 }
2702
2703 static struct net *devlink_netns_get(struct sk_buff *skb,
2704                                      struct genl_info *info)
2705 {
2706         struct nlattr *netns_pid_attr = info->attrs[DEVLINK_ATTR_NETNS_PID];
2707         struct nlattr *netns_fd_attr = info->attrs[DEVLINK_ATTR_NETNS_FD];
2708         struct nlattr *netns_id_attr = info->attrs[DEVLINK_ATTR_NETNS_ID];
2709         struct net *net;
2710
2711         if (!!netns_pid_attr + !!netns_fd_attr + !!netns_id_attr > 1) {
2712                 NL_SET_ERR_MSG(info->extack, "multiple netns identifying attributes specified");
2713                 return ERR_PTR(-EINVAL);
2714         }
2715
2716         if (netns_pid_attr) {
2717                 net = get_net_ns_by_pid(nla_get_u32(netns_pid_attr));
2718         } else if (netns_fd_attr) {
2719                 net = get_net_ns_by_fd(nla_get_u32(netns_fd_attr));
2720         } else if (netns_id_attr) {
2721                 net = get_net_ns_by_id(sock_net(skb->sk),
2722                                        nla_get_u32(netns_id_attr));
2723                 if (!net)
2724                         net = ERR_PTR(-EINVAL);
2725         } else {
2726                 WARN_ON(1);
2727                 net = ERR_PTR(-EINVAL);
2728         }
2729         if (IS_ERR(net)) {
2730                 NL_SET_ERR_MSG(info->extack, "Unknown network namespace");
2731                 return ERR_PTR(-EINVAL);
2732         }
2733         if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
2734                 put_net(net);
2735                 return ERR_PTR(-EPERM);
2736         }
2737         return net;
2738 }
2739
2740 static void devlink_param_notify(struct devlink *devlink,
2741                                  unsigned int port_index,
2742                                  struct devlink_param_item *param_item,
2743                                  enum devlink_command cmd);
2744
2745 static void devlink_reload_netns_change(struct devlink *devlink,
2746                                         struct net *dest_net)
2747 {
2748         struct devlink_param_item *param_item;
2749
2750         /* Userspace needs to be notified about devlink objects
2751          * removed from original and entering new network namespace.
2752          * The rest of the devlink objects are re-created during
2753          * reload process so the notifications are generated separatelly.
2754          */
2755
2756         list_for_each_entry(param_item, &devlink->param_list, list)
2757                 devlink_param_notify(devlink, 0, param_item,
2758                                      DEVLINK_CMD_PARAM_DEL);
2759         devlink_notify(devlink, DEVLINK_CMD_DEL);
2760
2761         __devlink_net_set(devlink, dest_net);
2762
2763         devlink_notify(devlink, DEVLINK_CMD_NEW);
2764         list_for_each_entry(param_item, &devlink->param_list, list)
2765                 devlink_param_notify(devlink, 0, param_item,
2766                                      DEVLINK_CMD_PARAM_NEW);
2767 }
2768
2769 static bool devlink_reload_supported(struct devlink *devlink)
2770 {
2771         return devlink->ops->reload_down && devlink->ops->reload_up;
2772 }
2773
2774 static void devlink_reload_failed_set(struct devlink *devlink,
2775                                       bool reload_failed)
2776 {
2777         if (devlink->reload_failed == reload_failed)
2778                 return;
2779         devlink->reload_failed = reload_failed;
2780         devlink_notify(devlink, DEVLINK_CMD_NEW);
2781 }
2782
2783 bool devlink_is_reload_failed(const struct devlink *devlink)
2784 {
2785         return devlink->reload_failed;
2786 }
2787 EXPORT_SYMBOL_GPL(devlink_is_reload_failed);
2788
2789 static int devlink_reload(struct devlink *devlink, struct net *dest_net,
2790                           struct netlink_ext_ack *extack)
2791 {
2792         int err;
2793
2794         if (!devlink->reload_enabled)
2795                 return -EOPNOTSUPP;
2796
2797         err = devlink->ops->reload_down(devlink, !!dest_net, extack);
2798         if (err)
2799                 return err;
2800
2801         if (dest_net && !net_eq(dest_net, devlink_net(devlink)))
2802                 devlink_reload_netns_change(devlink, dest_net);
2803
2804         err = devlink->ops->reload_up(devlink, extack);
2805         devlink_reload_failed_set(devlink, !!err);
2806         return err;
2807 }
2808
2809 static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
2810 {
2811         struct devlink *devlink = info->user_ptr[0];
2812         struct net *dest_net = NULL;
2813         int err;
2814
2815         if (!devlink_reload_supported(devlink))
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
3011 static int devlink_param_generic_verify(const struct devlink_param *param)
3012 {
3013         /* verify it match generic parameter by id and name */
3014         if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
3015                 return -EINVAL;
3016         if (strcmp(param->name, devlink_param_generic[param->id].name))
3017                 return -ENOENT;
3018
3019         WARN_ON(param->type != devlink_param_generic[param->id].type);
3020
3021         return 0;
3022 }
3023
3024 static int devlink_param_driver_verify(const struct devlink_param *param)
3025 {
3026         int i;
3027
3028         if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
3029                 return -EINVAL;
3030         /* verify no such name in generic params */
3031         for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
3032                 if (!strcmp(param->name, devlink_param_generic[i].name))
3033                         return -EEXIST;
3034
3035         return 0;
3036 }
3037
3038 static struct devlink_param_item *
3039 devlink_param_find_by_name(struct list_head *param_list,
3040                            const char *param_name)
3041 {
3042         struct devlink_param_item *param_item;
3043
3044         list_for_each_entry(param_item, param_list, list)
3045                 if (!strcmp(param_item->param->name, param_name))
3046                         return param_item;
3047         return NULL;
3048 }
3049
3050 static struct devlink_param_item *
3051 devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
3052 {
3053         struct devlink_param_item *param_item;
3054
3055         list_for_each_entry(param_item, param_list, list)
3056                 if (param_item->param->id == param_id)
3057                         return param_item;
3058         return NULL;
3059 }
3060
3061 static bool
3062 devlink_param_cmode_is_supported(const struct devlink_param *param,
3063                                  enum devlink_param_cmode cmode)
3064 {
3065         return test_bit(cmode, &param->supported_cmodes);
3066 }
3067
3068 static int devlink_param_get(struct devlink *devlink,
3069                              const struct devlink_param *param,
3070                              struct devlink_param_gset_ctx *ctx)
3071 {
3072         if (!param->get)
3073                 return -EOPNOTSUPP;
3074         return param->get(devlink, param->id, ctx);
3075 }
3076
3077 static int devlink_param_set(struct devlink *devlink,
3078                              const struct devlink_param *param,
3079                              struct devlink_param_gset_ctx *ctx)
3080 {
3081         if (!param->set)
3082                 return -EOPNOTSUPP;
3083         return param->set(devlink, param->id, ctx);
3084 }
3085
3086 static int
3087 devlink_param_type_to_nla_type(enum devlink_param_type param_type)
3088 {
3089         switch (param_type) {
3090         case DEVLINK_PARAM_TYPE_U8:
3091                 return NLA_U8;
3092         case DEVLINK_PARAM_TYPE_U16:
3093                 return NLA_U16;
3094         case DEVLINK_PARAM_TYPE_U32:
3095                 return NLA_U32;
3096         case DEVLINK_PARAM_TYPE_STRING:
3097                 return NLA_STRING;
3098         case DEVLINK_PARAM_TYPE_BOOL:
3099                 return NLA_FLAG;
3100         default:
3101                 return -EINVAL;
3102         }
3103 }
3104
3105 static int
3106 devlink_nl_param_value_fill_one(struct sk_buff *msg,
3107                                 enum devlink_param_type type,
3108                                 enum devlink_param_cmode cmode,
3109                                 union devlink_param_value val)
3110 {
3111         struct nlattr *param_value_attr;
3112
3113         param_value_attr = nla_nest_start_noflag(msg,
3114                                                  DEVLINK_ATTR_PARAM_VALUE);
3115         if (!param_value_attr)
3116                 goto nla_put_failure;
3117
3118         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
3119                 goto value_nest_cancel;
3120
3121         switch (type) {
3122         case DEVLINK_PARAM_TYPE_U8:
3123                 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
3124                         goto value_nest_cancel;
3125                 break;
3126         case DEVLINK_PARAM_TYPE_U16:
3127                 if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
3128                         goto value_nest_cancel;
3129                 break;
3130         case DEVLINK_PARAM_TYPE_U32:
3131                 if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
3132                         goto value_nest_cancel;
3133                 break;
3134         case DEVLINK_PARAM_TYPE_STRING:
3135                 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
3136                                    val.vstr))
3137                         goto value_nest_cancel;
3138                 break;
3139         case DEVLINK_PARAM_TYPE_BOOL:
3140                 if (val.vbool &&
3141                     nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
3142                         goto value_nest_cancel;
3143                 break;
3144         }
3145
3146         nla_nest_end(msg, param_value_attr);
3147         return 0;
3148
3149 value_nest_cancel:
3150         nla_nest_cancel(msg, param_value_attr);
3151 nla_put_failure:
3152         return -EMSGSIZE;
3153 }
3154
3155 static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
3156                                  unsigned int port_index,
3157                                  struct devlink_param_item *param_item,
3158                                  enum devlink_command cmd,
3159                                  u32 portid, u32 seq, int flags)
3160 {
3161         union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
3162         bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {};
3163         const struct devlink_param *param = param_item->param;
3164         struct devlink_param_gset_ctx ctx;
3165         struct nlattr *param_values_list;
3166         struct nlattr *param_attr;
3167         int nla_type;
3168         void *hdr;
3169         int err;
3170         int i;
3171
3172         /* Get value from driver part to driverinit configuration mode */
3173         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3174                 if (!devlink_param_cmode_is_supported(param, i))
3175                         continue;
3176                 if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3177                         if (!param_item->driverinit_value_valid)
3178                                 return -EOPNOTSUPP;
3179                         param_value[i] = param_item->driverinit_value;
3180                 } else {
3181                         if (!param_item->published)
3182                                 continue;
3183                         ctx.cmode = i;
3184                         err = devlink_param_get(devlink, param, &ctx);
3185                         if (err)
3186                                 return err;
3187                         param_value[i] = ctx.val;
3188                 }
3189                 param_value_set[i] = true;
3190         }
3191
3192         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3193         if (!hdr)
3194                 return -EMSGSIZE;
3195
3196         if (devlink_nl_put_handle(msg, devlink))
3197                 goto genlmsg_cancel;
3198
3199         if (cmd == DEVLINK_CMD_PORT_PARAM_GET ||
3200             cmd == DEVLINK_CMD_PORT_PARAM_NEW ||
3201             cmd == DEVLINK_CMD_PORT_PARAM_DEL)
3202                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index))
3203                         goto genlmsg_cancel;
3204
3205         param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM);
3206         if (!param_attr)
3207                 goto genlmsg_cancel;
3208         if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
3209                 goto param_nest_cancel;
3210         if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
3211                 goto param_nest_cancel;
3212
3213         nla_type = devlink_param_type_to_nla_type(param->type);
3214         if (nla_type < 0)
3215                 goto param_nest_cancel;
3216         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
3217                 goto param_nest_cancel;
3218
3219         param_values_list = nla_nest_start_noflag(msg,
3220                                                   DEVLINK_ATTR_PARAM_VALUES_LIST);
3221         if (!param_values_list)
3222                 goto param_nest_cancel;
3223
3224         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3225                 if (!param_value_set[i])
3226                         continue;
3227                 err = devlink_nl_param_value_fill_one(msg, param->type,
3228                                                       i, param_value[i]);
3229                 if (err)
3230                         goto values_list_nest_cancel;
3231         }
3232
3233         nla_nest_end(msg, param_values_list);
3234         nla_nest_end(msg, param_attr);
3235         genlmsg_end(msg, hdr);
3236         return 0;
3237
3238 values_list_nest_cancel:
3239         nla_nest_end(msg, param_values_list);
3240 param_nest_cancel:
3241         nla_nest_cancel(msg, param_attr);
3242 genlmsg_cancel:
3243         genlmsg_cancel(msg, hdr);
3244         return -EMSGSIZE;
3245 }
3246
3247 static void devlink_param_notify(struct devlink *devlink,
3248                                  unsigned int port_index,
3249                                  struct devlink_param_item *param_item,
3250                                  enum devlink_command cmd)
3251 {
3252         struct sk_buff *msg;
3253         int err;
3254
3255         WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL &&
3256                 cmd != DEVLINK_CMD_PORT_PARAM_NEW &&
3257                 cmd != DEVLINK_CMD_PORT_PARAM_DEL);
3258
3259         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3260         if (!msg)
3261                 return;
3262         err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd,
3263                                     0, 0, 0);
3264         if (err) {
3265                 nlmsg_free(msg);
3266                 return;
3267         }
3268
3269         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3270                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3271 }
3272
3273 static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
3274                                            struct netlink_callback *cb)
3275 {
3276         struct devlink_param_item *param_item;
3277         struct devlink *devlink;
3278         int start = cb->args[0];
3279         int idx = 0;
3280         int err = 0;
3281
3282         mutex_lock(&devlink_mutex);
3283         list_for_each_entry(devlink, &devlink_list, list) {
3284                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3285                         continue;
3286                 mutex_lock(&devlink->lock);
3287                 list_for_each_entry(param_item, &devlink->param_list, list) {
3288                         if (idx < start) {
3289                                 idx++;
3290                                 continue;
3291                         }
3292                         err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3293                                                     DEVLINK_CMD_PARAM_GET,
3294                                                     NETLINK_CB(cb->skb).portid,
3295                                                     cb->nlh->nlmsg_seq,
3296                                                     NLM_F_MULTI);
3297                         if (err && err != -EOPNOTSUPP) {
3298                                 mutex_unlock(&devlink->lock);
3299                                 goto out;
3300                         }
3301                         idx++;
3302                 }
3303                 mutex_unlock(&devlink->lock);
3304         }
3305 out:
3306         mutex_unlock(&devlink_mutex);
3307
3308         if (err != -EMSGSIZE)
3309                 return err;
3310
3311         cb->args[0] = idx;
3312         return msg->len;
3313 }
3314
3315 static int
3316 devlink_param_type_get_from_info(struct genl_info *info,
3317                                  enum devlink_param_type *param_type)
3318 {
3319         if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE])
3320                 return -EINVAL;
3321
3322         switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
3323         case NLA_U8:
3324                 *param_type = DEVLINK_PARAM_TYPE_U8;
3325                 break;
3326         case NLA_U16:
3327                 *param_type = DEVLINK_PARAM_TYPE_U16;
3328                 break;
3329         case NLA_U32:
3330                 *param_type = DEVLINK_PARAM_TYPE_U32;
3331                 break;
3332         case NLA_STRING:
3333                 *param_type = DEVLINK_PARAM_TYPE_STRING;
3334                 break;
3335         case NLA_FLAG:
3336                 *param_type = DEVLINK_PARAM_TYPE_BOOL;
3337                 break;
3338         default:
3339                 return -EINVAL;
3340         }
3341
3342         return 0;
3343 }
3344
3345 static int
3346 devlink_param_value_get_from_info(const struct devlink_param *param,
3347                                   struct genl_info *info,
3348                                   union devlink_param_value *value)
3349 {
3350         int len;
3351
3352         if (param->type != DEVLINK_PARAM_TYPE_BOOL &&
3353             !info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA])
3354                 return -EINVAL;
3355
3356         switch (param->type) {
3357         case DEVLINK_PARAM_TYPE_U8:
3358                 value->vu8 = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3359                 break;
3360         case DEVLINK_PARAM_TYPE_U16:
3361                 value->vu16 = nla_get_u16(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3362                 break;
3363         case DEVLINK_PARAM_TYPE_U32:
3364                 value->vu32 = nla_get_u32(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3365                 break;
3366         case DEVLINK_PARAM_TYPE_STRING:
3367                 len = strnlen(nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]),
3368                               nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3369                 if (len == nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) ||
3370                     len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
3371                         return -EINVAL;
3372                 strcpy(value->vstr,
3373                        nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3374                 break;
3375         case DEVLINK_PARAM_TYPE_BOOL:
3376                 value->vbool = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA] ?
3377                                true : false;
3378                 break;
3379         }
3380         return 0;
3381 }
3382
3383 static struct devlink_param_item *
3384 devlink_param_get_from_info(struct list_head *param_list,
3385                             struct genl_info *info)
3386 {
3387         char *param_name;
3388
3389         if (!info->attrs[DEVLINK_ATTR_PARAM_NAME])
3390                 return NULL;
3391
3392         param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
3393         return devlink_param_find_by_name(param_list, param_name);
3394 }
3395
3396 static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
3397                                          struct genl_info *info)
3398 {
3399         struct devlink *devlink = info->user_ptr[0];
3400         struct devlink_param_item *param_item;
3401         struct sk_buff *msg;
3402         int err;
3403
3404         param_item = devlink_param_get_from_info(&devlink->param_list, info);
3405         if (!param_item)
3406                 return -EINVAL;
3407
3408         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3409         if (!msg)
3410                 return -ENOMEM;
3411
3412         err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3413                                     DEVLINK_CMD_PARAM_GET,
3414                                     info->snd_portid, info->snd_seq, 0);
3415         if (err) {
3416                 nlmsg_free(msg);
3417                 return err;
3418         }
3419
3420         return genlmsg_reply(msg, info);
3421 }
3422
3423 static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink,
3424                                            unsigned int port_index,
3425                                            struct list_head *param_list,
3426                                            struct genl_info *info,
3427                                            enum devlink_command cmd)
3428 {
3429         enum devlink_param_type param_type;
3430         struct devlink_param_gset_ctx ctx;
3431         enum devlink_param_cmode cmode;
3432         struct devlink_param_item *param_item;
3433         const struct devlink_param *param;
3434         union devlink_param_value value;
3435         int err = 0;
3436
3437         param_item = devlink_param_get_from_info(param_list, info);
3438         if (!param_item)
3439                 return -EINVAL;
3440         param = param_item->param;
3441         err = devlink_param_type_get_from_info(info, &param_type);
3442         if (err)
3443                 return err;
3444         if (param_type != param->type)
3445                 return -EINVAL;
3446         err = devlink_param_value_get_from_info(param, info, &value);
3447         if (err)
3448                 return err;
3449         if (param->validate) {
3450                 err = param->validate(devlink, param->id, value, info->extack);
3451                 if (err)
3452                         return err;
3453         }
3454
3455         if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE])
3456                 return -EINVAL;
3457         cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
3458         if (!devlink_param_cmode_is_supported(param, cmode))
3459                 return -EOPNOTSUPP;
3460
3461         if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3462                 if (param->type == DEVLINK_PARAM_TYPE_STRING)
3463                         strcpy(param_item->driverinit_value.vstr, value.vstr);
3464                 else
3465                         param_item->driverinit_value = value;
3466                 param_item->driverinit_value_valid = true;
3467         } else {
3468                 if (!param->set)
3469                         return -EOPNOTSUPP;
3470                 ctx.val = value;
3471                 ctx.cmode = cmode;
3472                 err = devlink_param_set(devlink, param, &ctx);
3473                 if (err)
3474                         return err;
3475         }
3476
3477         devlink_param_notify(devlink, port_index, param_item, cmd);
3478         return 0;
3479 }
3480
3481 static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
3482                                          struct genl_info *info)
3483 {
3484         struct devlink *devlink = info->user_ptr[0];
3485
3486         return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->param_list,
3487                                                info, DEVLINK_CMD_PARAM_NEW);
3488 }
3489
3490 static int devlink_param_register_one(struct devlink *devlink,
3491                                       unsigned int port_index,
3492                                       struct list_head *param_list,
3493                                       const struct devlink_param *param,
3494                                       enum devlink_command cmd)
3495 {
3496         struct devlink_param_item *param_item;
3497
3498         if (devlink_param_find_by_name(param_list, param->name))
3499                 return -EEXIST;
3500
3501         if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
3502                 WARN_ON(param->get || param->set);
3503         else
3504                 WARN_ON(!param->get || !param->set);
3505
3506         param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
3507         if (!param_item)
3508                 return -ENOMEM;
3509         param_item->param = param;
3510
3511         list_add_tail(&param_item->list, param_list);
3512         devlink_param_notify(devlink, port_index, param_item, cmd);
3513         return 0;
3514 }
3515
3516 static void devlink_param_unregister_one(struct devlink *devlink,
3517                                          unsigned int port_index,
3518                                          struct list_head *param_list,
3519                                          const struct devlink_param *param,
3520                                          enum devlink_command cmd)
3521 {
3522         struct devlink_param_item *param_item;
3523
3524         param_item = devlink_param_find_by_name(param_list, param->name);
3525         WARN_ON(!param_item);
3526         devlink_param_notify(devlink, port_index, param_item, cmd);
3527         list_del(&param_item->list);
3528         kfree(param_item);
3529 }
3530
3531 static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg,
3532                                                 struct netlink_callback *cb)
3533 {
3534         struct devlink_param_item *param_item;
3535         struct devlink_port *devlink_port;
3536         struct devlink *devlink;
3537         int start = cb->args[0];
3538         int idx = 0;
3539         int err = 0;
3540
3541         mutex_lock(&devlink_mutex);
3542         list_for_each_entry(devlink, &devlink_list, list) {
3543                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3544                         continue;
3545                 mutex_lock(&devlink->lock);
3546                 list_for_each_entry(devlink_port, &devlink->port_list, list) {
3547                         list_for_each_entry(param_item,
3548                                             &devlink_port->param_list, list) {
3549                                 if (idx < start) {
3550                                         idx++;
3551                                         continue;
3552                                 }
3553                                 err = devlink_nl_param_fill(msg,
3554                                                 devlink_port->devlink,
3555                                                 devlink_port->index, param_item,
3556                                                 DEVLINK_CMD_PORT_PARAM_GET,
3557                                                 NETLINK_CB(cb->skb).portid,
3558                                                 cb->nlh->nlmsg_seq,
3559                                                 NLM_F_MULTI);
3560                                 if (err && err != -EOPNOTSUPP) {
3561                                         mutex_unlock(&devlink->lock);
3562                                         goto out;
3563                                 }
3564                                 idx++;
3565                         }
3566                 }
3567                 mutex_unlock(&devlink->lock);
3568         }
3569 out:
3570         mutex_unlock(&devlink_mutex);
3571
3572         if (err != -EMSGSIZE)
3573                 return err;
3574
3575         cb->args[0] = idx;
3576         return msg->len;
3577 }
3578
3579 static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
3580                                               struct genl_info *info)
3581 {
3582         struct devlink_port *devlink_port = info->user_ptr[0];
3583         struct devlink_param_item *param_item;
3584         struct sk_buff *msg;
3585         int err;
3586
3587         param_item = devlink_param_get_from_info(&devlink_port->param_list,
3588                                                  info);
3589         if (!param_item)
3590                 return -EINVAL;
3591
3592         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3593         if (!msg)
3594                 return -ENOMEM;
3595
3596         err = devlink_nl_param_fill(msg, devlink_port->devlink,
3597                                     devlink_port->index, param_item,
3598                                     DEVLINK_CMD_PORT_PARAM_GET,
3599                                     info->snd_portid, info->snd_seq, 0);
3600         if (err) {
3601                 nlmsg_free(msg);
3602                 return err;
3603         }
3604
3605         return genlmsg_reply(msg, info);
3606 }
3607
3608 static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
3609                                               struct genl_info *info)
3610 {
3611         struct devlink_port *devlink_port = info->user_ptr[0];
3612
3613         return __devlink_nl_cmd_param_set_doit(devlink_port->devlink,
3614                                                devlink_port->index,
3615                                                &devlink_port->param_list, info,
3616                                                DEVLINK_CMD_PORT_PARAM_NEW);
3617 }
3618
3619 static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
3620                                              struct devlink *devlink,
3621                                              struct devlink_snapshot *snapshot)
3622 {
3623         struct nlattr *snap_attr;
3624         int err;
3625
3626         snap_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
3627         if (!snap_attr)
3628                 return -EINVAL;
3629
3630         err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
3631         if (err)
3632                 goto nla_put_failure;
3633
3634         nla_nest_end(msg, snap_attr);
3635         return 0;
3636
3637 nla_put_failure:
3638         nla_nest_cancel(msg, snap_attr);
3639         return err;
3640 }
3641
3642 static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
3643                                               struct devlink *devlink,
3644                                               struct devlink_region *region)
3645 {
3646         struct devlink_snapshot *snapshot;
3647         struct nlattr *snapshots_attr;
3648         int err;
3649
3650         snapshots_attr = nla_nest_start_noflag(msg,
3651                                                DEVLINK_ATTR_REGION_SNAPSHOTS);
3652         if (!snapshots_attr)
3653                 return -EINVAL;
3654
3655         list_for_each_entry(snapshot, &region->snapshot_list, list) {
3656                 err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
3657                 if (err)
3658                         goto nla_put_failure;
3659         }
3660
3661         nla_nest_end(msg, snapshots_attr);
3662         return 0;
3663
3664 nla_put_failure:
3665         nla_nest_cancel(msg, snapshots_attr);
3666         return err;
3667 }
3668
3669 static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
3670                                   enum devlink_command cmd, u32 portid,
3671                                   u32 seq, int flags,
3672                                   struct devlink_region *region)
3673 {
3674         void *hdr;
3675         int err;
3676
3677         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3678         if (!hdr)
3679                 return -EMSGSIZE;
3680
3681         err = devlink_nl_put_handle(msg, devlink);
3682         if (err)
3683                 goto nla_put_failure;
3684
3685         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->name);
3686         if (err)
3687                 goto nla_put_failure;
3688
3689         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3690                                 region->size,
3691                                 DEVLINK_ATTR_PAD);
3692         if (err)
3693                 goto nla_put_failure;
3694
3695         err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
3696         if (err)
3697                 goto nla_put_failure;
3698
3699         genlmsg_end(msg, hdr);
3700         return 0;
3701
3702 nla_put_failure:
3703         genlmsg_cancel(msg, hdr);
3704         return err;
3705 }
3706
3707 static void devlink_nl_region_notify(struct devlink_region *region,
3708                                      struct devlink_snapshot *snapshot,
3709                                      enum devlink_command cmd)
3710 {
3711         struct devlink *devlink = region->devlink;
3712         struct sk_buff *msg;
3713         void *hdr;
3714         int err;
3715
3716         WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
3717
3718         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3719         if (!msg)
3720                 return;
3721
3722         hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
3723         if (!hdr)
3724                 goto out_free_msg;
3725
3726         err = devlink_nl_put_handle(msg, devlink);
3727         if (err)
3728                 goto out_cancel_msg;
3729
3730         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
3731                              region->name);
3732         if (err)
3733                 goto out_cancel_msg;
3734
3735         if (snapshot) {
3736                 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
3737                                   snapshot->id);
3738                 if (err)
3739                         goto out_cancel_msg;
3740         } else {
3741                 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3742                                         region->size, DEVLINK_ATTR_PAD);
3743                 if (err)
3744                         goto out_cancel_msg;
3745         }
3746         genlmsg_end(msg, hdr);
3747
3748         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3749                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3750
3751         return;
3752
3753 out_cancel_msg:
3754         genlmsg_cancel(msg, hdr);
3755 out_free_msg:
3756         nlmsg_free(msg);
3757 }
3758
3759 static void devlink_region_snapshot_del(struct devlink_region *region,
3760                                         struct devlink_snapshot *snapshot)
3761 {
3762         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
3763         region->cur_snapshots--;
3764         list_del(&snapshot->list);
3765         (*snapshot->data_destructor)(snapshot->data);
3766         kfree(snapshot);
3767 }
3768
3769 static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
3770                                           struct genl_info *info)
3771 {
3772         struct devlink *devlink = info->user_ptr[0];
3773         struct devlink_region *region;
3774         const char *region_name;
3775         struct sk_buff *msg;
3776         int err;
3777
3778         if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
3779                 return -EINVAL;
3780
3781         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3782         region = devlink_region_get_by_name(devlink, region_name);
3783         if (!region)
3784                 return -EINVAL;
3785
3786         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3787         if (!msg)
3788                 return -ENOMEM;
3789
3790         err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
3791                                      info->snd_portid, info->snd_seq, 0,
3792                                      region);
3793         if (err) {
3794                 nlmsg_free(msg);
3795                 return err;
3796         }
3797
3798         return genlmsg_reply(msg, info);
3799 }
3800
3801 static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
3802                                             struct netlink_callback *cb)
3803 {
3804         struct devlink_region *region;
3805         struct devlink *devlink;
3806         int start = cb->args[0];
3807         int idx = 0;
3808         int err;
3809
3810         mutex_lock(&devlink_mutex);
3811         list_for_each_entry(devlink, &devlink_list, list) {
3812                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3813                         continue;
3814
3815                 mutex_lock(&devlink->lock);
3816                 list_for_each_entry(region, &devlink->region_list, list) {
3817                         if (idx < start) {
3818                                 idx++;
3819                                 continue;
3820                         }
3821                         err = devlink_nl_region_fill(msg, devlink,
3822                                                      DEVLINK_CMD_REGION_GET,
3823                                                      NETLINK_CB(cb->skb).portid,
3824                                                      cb->nlh->nlmsg_seq,
3825                                                      NLM_F_MULTI, region);
3826                         if (err) {
3827                                 mutex_unlock(&devlink->lock);
3828                                 goto out;
3829                         }
3830                         idx++;
3831                 }
3832                 mutex_unlock(&devlink->lock);
3833         }
3834 out:
3835         mutex_unlock(&devlink_mutex);
3836         cb->args[0] = idx;
3837         return msg->len;
3838 }
3839
3840 static int devlink_nl_cmd_region_del(struct sk_buff *skb,
3841                                      struct genl_info *info)
3842 {
3843         struct devlink *devlink = info->user_ptr[0];
3844         struct devlink_snapshot *snapshot;
3845         struct devlink_region *region;
3846         const char *region_name;
3847         u32 snapshot_id;
3848
3849         if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
3850             !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
3851                 return -EINVAL;
3852
3853         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3854         snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3855
3856         region = devlink_region_get_by_name(devlink, region_name);
3857         if (!region)
3858                 return -EINVAL;
3859
3860         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3861         if (!snapshot)
3862                 return -EINVAL;
3863
3864         devlink_region_snapshot_del(region, snapshot);
3865         return 0;
3866 }
3867
3868 static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
3869                                                  struct devlink *devlink,
3870                                                  u8 *chunk, u32 chunk_size,
3871                                                  u64 addr)
3872 {
3873         struct nlattr *chunk_attr;
3874         int err;
3875
3876         chunk_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_CHUNK);
3877         if (!chunk_attr)
3878                 return -EINVAL;
3879
3880         err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
3881         if (err)
3882                 goto nla_put_failure;
3883
3884         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
3885                                 DEVLINK_ATTR_PAD);
3886         if (err)
3887                 goto nla_put_failure;
3888
3889         nla_nest_end(msg, chunk_attr);
3890         return 0;
3891
3892 nla_put_failure:
3893         nla_nest_cancel(msg, chunk_attr);
3894         return err;
3895 }
3896
3897 #define DEVLINK_REGION_READ_CHUNK_SIZE 256
3898
3899 static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
3900                                                 struct devlink *devlink,
3901                                                 struct devlink_region *region,
3902                                                 struct nlattr **attrs,
3903                                                 u64 start_offset,
3904                                                 u64 end_offset,
3905                                                 bool dump,
3906                                                 u64 *new_offset)
3907 {
3908         struct devlink_snapshot *snapshot;
3909         u64 curr_offset = start_offset;
3910         u32 snapshot_id;
3911         int err = 0;
3912
3913         *new_offset = start_offset;
3914
3915         snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3916         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3917         if (!snapshot)
3918                 return -EINVAL;
3919
3920         if (end_offset > region->size || dump)
3921                 end_offset = region->size;
3922
3923         while (curr_offset < end_offset) {
3924                 u32 data_size;
3925                 u8 *data;
3926
3927                 if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
3928                         data_size = end_offset - curr_offset;
3929                 else
3930                         data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
3931
3932                 data = &snapshot->data[curr_offset];
3933                 err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
3934                                                             data, data_size,
3935                                                             curr_offset);
3936                 if (err)
3937                         break;
3938
3939                 curr_offset += data_size;
3940         }
3941         *new_offset = curr_offset;
3942
3943         return err;
3944 }
3945
3946 static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
3947                                              struct netlink_callback *cb)
3948 {
3949         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
3950         u64 ret_offset, start_offset, end_offset = 0;
3951         struct nlattr **attrs = info->attrs;
3952         struct devlink_region *region;
3953         struct nlattr *chunks_attr;
3954         const char *region_name;
3955         struct devlink *devlink;
3956         bool dump = true;
3957         void *hdr;
3958         int err;
3959
3960         start_offset = *((u64 *)&cb->args[0]);
3961
3962         mutex_lock(&devlink_mutex);
3963         devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
3964         if (IS_ERR(devlink)) {
3965                 err = PTR_ERR(devlink);
3966                 goto out_dev;
3967         }
3968
3969         mutex_lock(&devlink->lock);
3970
3971         if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
3972             !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
3973                 err = -EINVAL;
3974                 goto out_unlock;
3975         }
3976
3977         region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
3978         region = devlink_region_get_by_name(devlink, region_name);
3979         if (!region) {
3980                 err = -EINVAL;
3981                 goto out_unlock;
3982         }
3983
3984         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3985                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
3986                           DEVLINK_CMD_REGION_READ);
3987         if (!hdr) {
3988                 err = -EMSGSIZE;
3989                 goto out_unlock;
3990         }
3991
3992         err = devlink_nl_put_handle(skb, devlink);
3993         if (err)
3994                 goto nla_put_failure;
3995
3996         err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
3997         if (err)
3998                 goto nla_put_failure;
3999
4000         chunks_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_REGION_CHUNKS);
4001         if (!chunks_attr) {
4002                 err = -EMSGSIZE;
4003                 goto nla_put_failure;
4004         }
4005
4006         if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
4007             attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
4008                 if (!start_offset)
4009                         start_offset =
4010                                 nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4011
4012                 end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4013                 end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
4014                 dump = false;
4015         }
4016
4017         err = devlink_nl_region_read_snapshot_fill(skb, devlink,
4018                                                    region, attrs,
4019                                                    start_offset,
4020                                                    end_offset, dump,
4021                                                    &ret_offset);
4022
4023         if (err && err != -EMSGSIZE)
4024                 goto nla_put_failure;
4025
4026         /* Check if there was any progress done to prevent infinite loop */
4027         if (ret_offset == start_offset) {
4028                 err = -EINVAL;
4029                 goto nla_put_failure;
4030         }
4031
4032         *((u64 *)&cb->args[0]) = ret_offset;
4033
4034         nla_nest_end(skb, chunks_attr);
4035         genlmsg_end(skb, hdr);
4036         mutex_unlock(&devlink->lock);
4037         mutex_unlock(&devlink_mutex);
4038
4039         return skb->len;
4040
4041 nla_put_failure:
4042         genlmsg_cancel(skb, hdr);
4043 out_unlock:
4044         mutex_unlock(&devlink->lock);
4045 out_dev:
4046         mutex_unlock(&devlink_mutex);
4047         return err;
4048 }
4049
4050 struct devlink_info_req {
4051         struct sk_buff *msg;
4052 };
4053
4054 int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name)
4055 {
4056         return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name);
4057 }
4058 EXPORT_SYMBOL_GPL(devlink_info_driver_name_put);
4059
4060 int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
4061 {
4062         return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn);
4063 }
4064 EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
4065
4066 static int devlink_info_version_put(struct devlink_info_req *req, int attr,
4067                                     const char *version_name,
4068                                     const char *version_value)
4069 {
4070         struct nlattr *nest;
4071         int err;
4072
4073         nest = nla_nest_start_noflag(req->msg, attr);
4074         if (!nest)
4075                 return -EMSGSIZE;
4076
4077         err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME,
4078                              version_name);
4079         if (err)
4080                 goto nla_put_failure;
4081
4082         err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE,
4083                              version_value);
4084         if (err)
4085                 goto nla_put_failure;
4086
4087         nla_nest_end(req->msg, nest);
4088
4089         return 0;
4090
4091 nla_put_failure:
4092         nla_nest_cancel(req->msg, nest);
4093         return err;
4094 }
4095
4096 int devlink_info_version_fixed_put(struct devlink_info_req *req,
4097                                    const char *version_name,
4098                                    const char *version_value)
4099 {
4100         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED,
4101                                         version_name, version_value);
4102 }
4103 EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
4104
4105 int devlink_info_version_stored_put(struct devlink_info_req *req,
4106                                     const char *version_name,
4107                                     const char *version_value)
4108 {
4109         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
4110                                         version_name, version_value);
4111 }
4112 EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
4113
4114 int devlink_info_version_running_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_RUNNING,
4119                                         version_name, version_value);
4120 }
4121 EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
4122
4123 static int
4124 devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
4125                      enum devlink_command cmd, u32 portid,
4126                      u32 seq, int flags, struct netlink_ext_ack *extack)
4127 {
4128         struct devlink_info_req req;
4129         void *hdr;
4130         int err;
4131
4132         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4133         if (!hdr)
4134                 return -EMSGSIZE;
4135
4136         err = -EMSGSIZE;
4137         if (devlink_nl_put_handle(msg, devlink))
4138                 goto err_cancel_msg;
4139
4140         req.msg = msg;
4141         err = devlink->ops->info_get(devlink, &req, extack);
4142         if (err)
4143                 goto err_cancel_msg;
4144
4145         genlmsg_end(msg, hdr);
4146         return 0;
4147
4148 err_cancel_msg:
4149         genlmsg_cancel(msg, hdr);
4150         return err;
4151 }
4152
4153 static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb,
4154                                         struct genl_info *info)
4155 {
4156         struct devlink *devlink = info->user_ptr[0];
4157         struct sk_buff *msg;
4158         int err;
4159
4160         if (!devlink->ops->info_get)
4161                 return -EOPNOTSUPP;
4162
4163         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4164         if (!msg)
4165                 return -ENOMEM;
4166
4167         err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4168                                    info->snd_portid, info->snd_seq, 0,
4169                                    info->extack);
4170         if (err) {
4171                 nlmsg_free(msg);
4172                 return err;
4173         }
4174
4175         return genlmsg_reply(msg, info);
4176 }
4177
4178 static int devlink_nl_cmd_info_get_dumpit(struct sk_buff *msg,
4179                                           struct netlink_callback *cb)
4180 {
4181         struct devlink *devlink;
4182         int start = cb->args[0];
4183         int idx = 0;
4184         int err = 0;
4185
4186         mutex_lock(&devlink_mutex);
4187         list_for_each_entry(devlink, &devlink_list, list) {
4188                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4189                         continue;
4190                 if (idx < start) {
4191                         idx++;
4192                         continue;
4193                 }
4194
4195                 if (!devlink->ops->info_get) {
4196                         idx++;
4197                         continue;
4198                 }
4199
4200                 mutex_lock(&devlink->lock);
4201                 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4202                                            NETLINK_CB(cb->skb).portid,
4203                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
4204                                            cb->extack);
4205                 mutex_unlock(&devlink->lock);
4206                 if (err && err != -EOPNOTSUPP)
4207                         break;
4208                 idx++;
4209         }
4210         mutex_unlock(&devlink_mutex);
4211
4212         if (err != -EMSGSIZE)
4213                 return err;
4214
4215         cb->args[0] = idx;
4216         return msg->len;
4217 }
4218
4219 struct devlink_fmsg_item {
4220         struct list_head list;
4221         int attrtype;
4222         u8 nla_type;
4223         u16 len;
4224         int value[0];
4225 };
4226
4227 struct devlink_fmsg {
4228         struct list_head item_list;
4229 };
4230
4231 static struct devlink_fmsg *devlink_fmsg_alloc(void)
4232 {
4233         struct devlink_fmsg *fmsg;
4234
4235         fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
4236         if (!fmsg)
4237                 return NULL;
4238
4239         INIT_LIST_HEAD(&fmsg->item_list);
4240
4241         return fmsg;
4242 }
4243
4244 static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
4245 {
4246         struct devlink_fmsg_item *item, *tmp;
4247
4248         list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
4249                 list_del(&item->list);
4250                 kfree(item);
4251         }
4252         kfree(fmsg);
4253 }
4254
4255 static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
4256                                     int attrtype)
4257 {
4258         struct devlink_fmsg_item *item;
4259
4260         item = kzalloc(sizeof(*item), GFP_KERNEL);
4261         if (!item)
4262                 return -ENOMEM;
4263
4264         item->attrtype = attrtype;
4265         list_add_tail(&item->list, &fmsg->item_list);
4266
4267         return 0;
4268 }
4269
4270 int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
4271 {
4272         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
4273 }
4274 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
4275
4276 static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
4277 {
4278         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
4279 }
4280
4281 int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
4282 {
4283         return devlink_fmsg_nest_end(fmsg);
4284 }
4285 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
4286
4287 #define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
4288
4289 static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
4290 {
4291         struct devlink_fmsg_item *item;
4292
4293         if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
4294                 return -EMSGSIZE;
4295
4296         item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
4297         if (!item)
4298                 return -ENOMEM;
4299
4300         item->nla_type = NLA_NUL_STRING;
4301         item->len = strlen(name) + 1;
4302         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
4303         memcpy(&item->value, name, item->len);
4304         list_add_tail(&item->list, &fmsg->item_list);
4305
4306         return 0;
4307 }
4308
4309 int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
4310 {
4311         int err;
4312
4313         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
4314         if (err)
4315                 return err;
4316
4317         err = devlink_fmsg_put_name(fmsg, name);
4318         if (err)
4319                 return err;
4320
4321         return 0;
4322 }
4323 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
4324
4325 int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
4326 {
4327         return devlink_fmsg_nest_end(fmsg);
4328 }
4329 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
4330
4331 int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
4332                                      const char *name)
4333 {
4334         int err;
4335
4336         err = devlink_fmsg_pair_nest_start(fmsg, name);
4337         if (err)
4338                 return err;
4339
4340         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
4341         if (err)
4342                 return err;
4343
4344         return 0;
4345 }
4346 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
4347
4348 int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
4349 {
4350         int err;
4351
4352         err = devlink_fmsg_nest_end(fmsg);
4353         if (err)
4354                 return err;
4355
4356         err = devlink_fmsg_nest_end(fmsg);
4357         if (err)
4358                 return err;
4359
4360         return 0;
4361 }
4362 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
4363
4364 static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
4365                                   const void *value, u16 value_len,
4366                                   u8 value_nla_type)
4367 {
4368         struct devlink_fmsg_item *item;
4369
4370         if (value_len > DEVLINK_FMSG_MAX_SIZE)
4371                 return -EMSGSIZE;
4372
4373         item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
4374         if (!item)
4375                 return -ENOMEM;
4376
4377         item->nla_type = value_nla_type;
4378         item->len = value_len;
4379         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4380         memcpy(&item->value, value, item->len);
4381         list_add_tail(&item->list, &fmsg->item_list);
4382
4383         return 0;
4384 }
4385
4386 int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
4387 {
4388         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
4389 }
4390 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
4391
4392 int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
4393 {
4394         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
4395 }
4396 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
4397
4398 int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
4399 {
4400         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
4401 }
4402 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
4403
4404 int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
4405 {
4406         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
4407 }
4408 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
4409
4410 int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
4411 {
4412         return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
4413                                       NLA_NUL_STRING);
4414 }
4415 EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
4416
4417 static int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
4418                                    u16 value_len)
4419 {
4420         return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
4421 }
4422
4423 int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
4424                                bool value)
4425 {
4426         int err;
4427
4428         err = devlink_fmsg_pair_nest_start(fmsg, name);
4429         if (err)
4430                 return err;
4431
4432         err = devlink_fmsg_bool_put(fmsg, value);
4433         if (err)
4434                 return err;
4435
4436         err = devlink_fmsg_pair_nest_end(fmsg);
4437         if (err)
4438                 return err;
4439
4440         return 0;
4441 }
4442 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
4443
4444 int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
4445                              u8 value)
4446 {
4447         int err;
4448
4449         err = devlink_fmsg_pair_nest_start(fmsg, name);
4450         if (err)
4451                 return err;
4452
4453         err = devlink_fmsg_u8_put(fmsg, value);
4454         if (err)
4455                 return err;
4456
4457         err = devlink_fmsg_pair_nest_end(fmsg);
4458         if (err)
4459                 return err;
4460
4461         return 0;
4462 }
4463 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
4464
4465 int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
4466                               u32 value)
4467 {
4468         int err;
4469
4470         err = devlink_fmsg_pair_nest_start(fmsg, name);
4471         if (err)
4472                 return err;
4473
4474         err = devlink_fmsg_u32_put(fmsg, value);
4475         if (err)
4476                 return err;
4477
4478         err = devlink_fmsg_pair_nest_end(fmsg);
4479         if (err)
4480                 return err;
4481
4482         return 0;
4483 }
4484 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
4485
4486 int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
4487                               u64 value)
4488 {
4489         int err;
4490
4491         err = devlink_fmsg_pair_nest_start(fmsg, name);
4492         if (err)
4493                 return err;
4494
4495         err = devlink_fmsg_u64_put(fmsg, value);
4496         if (err)
4497                 return err;
4498
4499         err = devlink_fmsg_pair_nest_end(fmsg);
4500         if (err)
4501                 return err;
4502
4503         return 0;
4504 }
4505 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
4506
4507 int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
4508                                  const char *value)
4509 {
4510         int err;
4511
4512         err = devlink_fmsg_pair_nest_start(fmsg, name);
4513         if (err)
4514                 return err;
4515
4516         err = devlink_fmsg_string_put(fmsg, value);
4517         if (err)
4518                 return err;
4519
4520         err = devlink_fmsg_pair_nest_end(fmsg);
4521         if (err)
4522                 return err;
4523
4524         return 0;
4525 }
4526 EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
4527
4528 int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
4529                                  const void *value, u32 value_len)
4530 {
4531         u32 data_size;
4532         u32 offset;
4533         int err;
4534
4535         err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
4536         if (err)
4537                 return err;
4538
4539         for (offset = 0; offset < value_len; offset += data_size) {
4540                 data_size = value_len - offset;
4541                 if (data_size > DEVLINK_FMSG_MAX_SIZE)
4542                         data_size = DEVLINK_FMSG_MAX_SIZE;
4543                 err = devlink_fmsg_binary_put(fmsg, value + offset, data_size);
4544                 if (err)
4545                         return err;
4546         }
4547
4548         err = devlink_fmsg_arr_pair_nest_end(fmsg);
4549         if (err)
4550                 return err;
4551
4552         return 0;
4553 }
4554 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
4555
4556 static int
4557 devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4558 {
4559         switch (msg->nla_type) {
4560         case NLA_FLAG:
4561         case NLA_U8:
4562         case NLA_U32:
4563         case NLA_U64:
4564         case NLA_NUL_STRING:
4565         case NLA_BINARY:
4566                 return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
4567                                   msg->nla_type);
4568         default:
4569                 return -EINVAL;
4570         }
4571 }
4572
4573 static int
4574 devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4575 {
4576         int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4577         u8 tmp;
4578
4579         switch (msg->nla_type) {
4580         case NLA_FLAG:
4581                 /* Always provide flag data, regardless of its value */
4582                 tmp = *(bool *) msg->value;
4583
4584                 return nla_put_u8(skb, attrtype, tmp);
4585         case NLA_U8:
4586                 return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
4587         case NLA_U32:
4588                 return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
4589         case NLA_U64:
4590                 return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
4591                                          DEVLINK_ATTR_PAD);
4592         case NLA_NUL_STRING:
4593                 return nla_put_string(skb, attrtype, (char *) &msg->value);
4594         case NLA_BINARY:
4595                 return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
4596         default:
4597                 return -EINVAL;
4598         }
4599 }
4600
4601 static int
4602 devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4603                          int *start)
4604 {
4605         struct devlink_fmsg_item *item;
4606         struct nlattr *fmsg_nlattr;
4607         int i = 0;
4608         int err;
4609
4610         fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
4611         if (!fmsg_nlattr)
4612                 return -EMSGSIZE;
4613
4614         list_for_each_entry(item, &fmsg->item_list, list) {
4615                 if (i < *start) {
4616                         i++;
4617                         continue;
4618                 }
4619
4620                 switch (item->attrtype) {
4621                 case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
4622                 case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
4623                 case DEVLINK_ATTR_FMSG_ARR_NEST_START:
4624                 case DEVLINK_ATTR_FMSG_NEST_END:
4625                         err = nla_put_flag(skb, item->attrtype);
4626                         break;
4627                 case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
4628                         err = devlink_fmsg_item_fill_type(item, skb);
4629                         if (err)
4630                                 break;
4631                         err = devlink_fmsg_item_fill_data(item, skb);
4632                         break;
4633                 case DEVLINK_ATTR_FMSG_OBJ_NAME:
4634                         err = nla_put_string(skb, item->attrtype,
4635                                              (char *) &item->value);
4636                         break;
4637                 default:
4638                         err = -EINVAL;
4639                         break;
4640                 }
4641                 if (!err)
4642                         *start = ++i;
4643                 else
4644                         break;
4645         }
4646
4647         nla_nest_end(skb, fmsg_nlattr);
4648         return err;
4649 }
4650
4651 static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
4652                             struct genl_info *info,
4653                             enum devlink_command cmd, int flags)
4654 {
4655         struct nlmsghdr *nlh;
4656         struct sk_buff *skb;
4657         bool last = false;
4658         int index = 0;
4659         void *hdr;
4660         int err;
4661
4662         while (!last) {
4663                 int tmp_index = index;
4664
4665                 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4666                 if (!skb)
4667                         return -ENOMEM;
4668
4669                 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
4670                                   &devlink_nl_family, flags | NLM_F_MULTI, cmd);
4671                 if (!hdr) {
4672                         err = -EMSGSIZE;
4673                         goto nla_put_failure;
4674                 }
4675
4676                 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
4677                 if (!err)
4678                         last = true;
4679                 else if (err != -EMSGSIZE || tmp_index == index)
4680                         goto nla_put_failure;
4681
4682                 genlmsg_end(skb, hdr);
4683                 err = genlmsg_reply(skb, info);
4684                 if (err)
4685                         return err;
4686         }
4687
4688         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
4689         if (!skb)
4690                 return -ENOMEM;
4691         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
4692                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
4693         if (!nlh) {
4694                 err = -EMSGSIZE;
4695                 goto nla_put_failure;
4696         }
4697
4698         return genlmsg_reply(skb, info);
4699
4700 nla_put_failure:
4701         nlmsg_free(skb);
4702         return err;
4703 }
4704
4705 static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4706                                struct netlink_callback *cb,
4707                                enum devlink_command cmd)
4708 {
4709         int index = cb->args[0];
4710         int tmp_index = index;
4711         void *hdr;
4712         int err;
4713
4714         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
4715                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
4716         if (!hdr) {
4717                 err = -EMSGSIZE;
4718                 goto nla_put_failure;
4719         }
4720
4721         err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
4722         if ((err && err != -EMSGSIZE) || tmp_index == index)
4723                 goto nla_put_failure;
4724
4725         cb->args[0] = index;
4726         genlmsg_end(skb, hdr);
4727         return skb->len;
4728
4729 nla_put_failure:
4730         genlmsg_cancel(skb, hdr);
4731         return err;
4732 }
4733
4734 struct devlink_health_reporter {
4735         struct list_head list;
4736         void *priv;
4737         const struct devlink_health_reporter_ops *ops;
4738         struct devlink *devlink;
4739         struct devlink_fmsg *dump_fmsg;
4740         struct mutex dump_lock; /* lock parallel read/write from dump buffers */
4741         u64 graceful_period;
4742         bool auto_recover;
4743         u8 health_state;
4744         u64 dump_ts;
4745         u64 error_count;
4746         u64 recovery_count;
4747         u64 last_recovery_ts;
4748         refcount_t refcount;
4749 };
4750
4751 void *
4752 devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
4753 {
4754         return reporter->priv;
4755 }
4756 EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
4757
4758 static struct devlink_health_reporter *
4759 devlink_health_reporter_find_by_name(struct devlink *devlink,
4760                                      const char *reporter_name)
4761 {
4762         struct devlink_health_reporter *reporter;
4763
4764         lockdep_assert_held(&devlink->reporters_lock);
4765         list_for_each_entry(reporter, &devlink->reporter_list, list)
4766                 if (!strcmp(reporter->ops->name, reporter_name))
4767                         return reporter;
4768         return NULL;
4769 }
4770
4771 /**
4772  *      devlink_health_reporter_create - create devlink health reporter
4773  *
4774  *      @devlink: devlink
4775  *      @ops: ops
4776  *      @graceful_period: to avoid recovery loops, in msecs
4777  *      @auto_recover: auto recover when error occurs
4778  *      @priv: priv
4779  */
4780 struct devlink_health_reporter *
4781 devlink_health_reporter_create(struct devlink *devlink,
4782                                const struct devlink_health_reporter_ops *ops,
4783                                u64 graceful_period, bool auto_recover,
4784                                void *priv)
4785 {
4786         struct devlink_health_reporter *reporter;
4787
4788         mutex_lock(&devlink->reporters_lock);
4789         if (devlink_health_reporter_find_by_name(devlink, ops->name)) {
4790                 reporter = ERR_PTR(-EEXIST);
4791                 goto unlock;
4792         }
4793
4794         if (WARN_ON(auto_recover && !ops->recover) ||
4795             WARN_ON(graceful_period && !ops->recover)) {
4796                 reporter = ERR_PTR(-EINVAL);
4797                 goto unlock;
4798         }
4799
4800         reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
4801         if (!reporter) {
4802                 reporter = ERR_PTR(-ENOMEM);
4803                 goto unlock;
4804         }
4805
4806         reporter->priv = priv;
4807         reporter->ops = ops;
4808         reporter->devlink = devlink;
4809         reporter->graceful_period = graceful_period;
4810         reporter->auto_recover = auto_recover;
4811         mutex_init(&reporter->dump_lock);
4812         refcount_set(&reporter->refcount, 1);
4813         list_add_tail(&reporter->list, &devlink->reporter_list);
4814 unlock:
4815         mutex_unlock(&devlink->reporters_lock);
4816         return reporter;
4817 }
4818 EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
4819
4820 /**
4821  *      devlink_health_reporter_destroy - destroy devlink health reporter
4822  *
4823  *      @reporter: devlink health reporter to destroy
4824  */
4825 void
4826 devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
4827 {
4828         mutex_lock(&reporter->devlink->reporters_lock);
4829         list_del(&reporter->list);
4830         mutex_unlock(&reporter->devlink->reporters_lock);
4831         while (refcount_read(&reporter->refcount) > 1)
4832                 msleep(100);
4833         mutex_destroy(&reporter->dump_lock);
4834         if (reporter->dump_fmsg)
4835                 devlink_fmsg_free(reporter->dump_fmsg);
4836         kfree(reporter);
4837 }
4838 EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
4839
4840 void
4841 devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
4842                                      enum devlink_health_reporter_state state)
4843 {
4844         if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
4845                     state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
4846                 return;
4847
4848         if (reporter->health_state == state)
4849                 return;
4850
4851         reporter->health_state = state;
4852         trace_devlink_health_reporter_state_update(reporter->devlink,
4853                                                    reporter->ops->name, state);
4854 }
4855 EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
4856
4857 static int
4858 devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
4859                                 void *priv_ctx, struct netlink_ext_ack *extack)
4860 {
4861         int err;
4862
4863         if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
4864                 return 0;
4865
4866         if (!reporter->ops->recover)
4867                 return -EOPNOTSUPP;
4868
4869         err = reporter->ops->recover(reporter, priv_ctx, extack);
4870         if (err)
4871                 return err;
4872
4873         reporter->recovery_count++;
4874         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
4875         reporter->last_recovery_ts = jiffies;
4876
4877         return 0;
4878 }
4879
4880 static void
4881 devlink_health_dump_clear(struct devlink_health_reporter *reporter)
4882 {
4883         if (!reporter->dump_fmsg)
4884                 return;
4885         devlink_fmsg_free(reporter->dump_fmsg);
4886         reporter->dump_fmsg = NULL;
4887 }
4888
4889 static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
4890                                   void *priv_ctx,
4891                                   struct netlink_ext_ack *extack)
4892 {
4893         int err;
4894
4895         if (!reporter->ops->dump)
4896                 return 0;
4897
4898         if (reporter->dump_fmsg)
4899                 return 0;
4900
4901         reporter->dump_fmsg = devlink_fmsg_alloc();
4902         if (!reporter->dump_fmsg) {
4903                 err = -ENOMEM;
4904                 return err;
4905         }
4906
4907         err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
4908         if (err)
4909                 goto dump_err;
4910
4911         err = reporter->ops->dump(reporter, reporter->dump_fmsg,
4912                                   priv_ctx, extack);
4913         if (err)
4914                 goto dump_err;
4915
4916         err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
4917         if (err)
4918                 goto dump_err;
4919
4920         reporter->dump_ts = jiffies;
4921
4922         return 0;
4923
4924 dump_err:
4925         devlink_health_dump_clear(reporter);
4926         return err;
4927 }
4928
4929 int devlink_health_report(struct devlink_health_reporter *reporter,
4930                           const char *msg, void *priv_ctx)
4931 {
4932         enum devlink_health_reporter_state prev_health_state;
4933         struct devlink *devlink = reporter->devlink;
4934
4935         /* write a log message of the current error */
4936         WARN_ON(!msg);
4937         trace_devlink_health_report(devlink, reporter->ops->name, msg);
4938         reporter->error_count++;
4939         prev_health_state = reporter->health_state;
4940         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
4941
4942         /* abort if the previous error wasn't recovered */
4943         if (reporter->auto_recover &&
4944             (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
4945              jiffies - reporter->last_recovery_ts <
4946              msecs_to_jiffies(reporter->graceful_period))) {
4947                 trace_devlink_health_recover_aborted(devlink,
4948                                                      reporter->ops->name,
4949                                                      reporter->health_state,
4950                                                      jiffies -
4951                                                      reporter->last_recovery_ts);
4952                 return -ECANCELED;
4953         }
4954
4955         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
4956
4957         mutex_lock(&reporter->dump_lock);
4958         /* store current dump of current error, for later analysis */
4959         devlink_health_do_dump(reporter, priv_ctx, NULL);
4960         mutex_unlock(&reporter->dump_lock);
4961
4962         if (reporter->auto_recover)
4963                 return devlink_health_reporter_recover(reporter,
4964                                                        priv_ctx, NULL);
4965
4966         return 0;
4967 }
4968 EXPORT_SYMBOL_GPL(devlink_health_report);
4969
4970 static struct devlink_health_reporter *
4971 devlink_health_reporter_get_from_attrs(struct devlink *devlink,
4972                                        struct nlattr **attrs)
4973 {
4974         struct devlink_health_reporter *reporter;
4975         char *reporter_name;
4976
4977         if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
4978                 return NULL;
4979
4980         reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
4981         mutex_lock(&devlink->reporters_lock);
4982         reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
4983         if (reporter)
4984                 refcount_inc(&reporter->refcount);
4985         mutex_unlock(&devlink->reporters_lock);
4986         return reporter;
4987 }
4988
4989 static struct devlink_health_reporter *
4990 devlink_health_reporter_get_from_info(struct devlink *devlink,
4991                                       struct genl_info *info)
4992 {
4993         return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
4994 }
4995
4996 static struct devlink_health_reporter *
4997 devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
4998 {
4999         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
5000         struct devlink_health_reporter *reporter;
5001         struct nlattr **attrs = info->attrs;
5002         struct devlink *devlink;
5003
5004         mutex_lock(&devlink_mutex);
5005         devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
5006         if (IS_ERR(devlink))
5007                 goto unlock;
5008
5009         reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
5010         mutex_unlock(&devlink_mutex);
5011         return reporter;
5012 unlock:
5013         mutex_unlock(&devlink_mutex);
5014         return NULL;
5015 }
5016
5017 static void
5018 devlink_health_reporter_put(struct devlink_health_reporter *reporter)
5019 {
5020         refcount_dec(&reporter->refcount);
5021 }
5022
5023 static int
5024 devlink_nl_health_reporter_fill(struct sk_buff *msg,
5025                                 struct devlink *devlink,
5026                                 struct devlink_health_reporter *reporter,
5027                                 enum devlink_command cmd, u32 portid,
5028                                 u32 seq, int flags)
5029 {
5030         struct nlattr *reporter_attr;
5031         void *hdr;
5032
5033         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5034         if (!hdr)
5035                 return -EMSGSIZE;
5036
5037         if (devlink_nl_put_handle(msg, devlink))
5038                 goto genlmsg_cancel;
5039
5040         reporter_attr = nla_nest_start_noflag(msg,
5041                                               DEVLINK_ATTR_HEALTH_REPORTER);
5042         if (!reporter_attr)
5043                 goto genlmsg_cancel;
5044         if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
5045                            reporter->ops->name))
5046                 goto reporter_nest_cancel;
5047         if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
5048                        reporter->health_state))
5049                 goto reporter_nest_cancel;
5050         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
5051                               reporter->error_count, DEVLINK_ATTR_PAD))
5052                 goto reporter_nest_cancel;
5053         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
5054                               reporter->recovery_count, DEVLINK_ATTR_PAD))
5055                 goto reporter_nest_cancel;
5056         if (reporter->ops->recover &&
5057             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
5058                               reporter->graceful_period,
5059                               DEVLINK_ATTR_PAD))
5060                 goto reporter_nest_cancel;
5061         if (reporter->ops->recover &&
5062             nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
5063                        reporter->auto_recover))
5064                 goto reporter_nest_cancel;
5065         if (reporter->dump_fmsg &&
5066             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
5067                               jiffies_to_msecs(reporter->dump_ts),
5068                               DEVLINK_ATTR_PAD))
5069                 goto reporter_nest_cancel;
5070
5071         nla_nest_end(msg, reporter_attr);
5072         genlmsg_end(msg, hdr);
5073         return 0;
5074
5075 reporter_nest_cancel:
5076         nla_nest_end(msg, reporter_attr);
5077 genlmsg_cancel:
5078         genlmsg_cancel(msg, hdr);
5079         return -EMSGSIZE;
5080 }
5081
5082 static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
5083                                                    struct genl_info *info)
5084 {
5085         struct devlink *devlink = info->user_ptr[0];
5086         struct devlink_health_reporter *reporter;
5087         struct sk_buff *msg;
5088         int err;
5089
5090         reporter = devlink_health_reporter_get_from_info(devlink, info);
5091         if (!reporter)
5092                 return -EINVAL;
5093
5094         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5095         if (!msg) {
5096                 err = -ENOMEM;
5097                 goto out;
5098         }
5099
5100         err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
5101                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
5102                                               info->snd_portid, info->snd_seq,
5103                                               0);
5104         if (err) {
5105                 nlmsg_free(msg);
5106                 goto out;
5107         }
5108
5109         err = genlmsg_reply(msg, info);
5110 out:
5111         devlink_health_reporter_put(reporter);
5112         return err;
5113 }
5114
5115 static int
5116 devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
5117                                           struct netlink_callback *cb)
5118 {
5119         struct devlink_health_reporter *reporter;
5120         struct devlink *devlink;
5121         int start = cb->args[0];
5122         int idx = 0;
5123         int err;
5124
5125         mutex_lock(&devlink_mutex);
5126         list_for_each_entry(devlink, &devlink_list, list) {
5127                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5128                         continue;
5129                 mutex_lock(&devlink->reporters_lock);
5130                 list_for_each_entry(reporter, &devlink->reporter_list,
5131                                     list) {
5132                         if (idx < start) {
5133                                 idx++;
5134                                 continue;
5135                         }
5136                         err = devlink_nl_health_reporter_fill(msg, devlink,
5137                                                               reporter,
5138                                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
5139                                                               NETLINK_CB(cb->skb).portid,
5140                                                               cb->nlh->nlmsg_seq,
5141                                                               NLM_F_MULTI);
5142                         if (err) {
5143                                 mutex_unlock(&devlink->reporters_lock);
5144                                 goto out;
5145                         }
5146                         idx++;
5147                 }
5148                 mutex_unlock(&devlink->reporters_lock);
5149         }
5150 out:
5151         mutex_unlock(&devlink_mutex);
5152
5153         cb->args[0] = idx;
5154         return msg->len;
5155 }
5156
5157 static int
5158 devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
5159                                         struct genl_info *info)
5160 {
5161         struct devlink *devlink = info->user_ptr[0];
5162         struct devlink_health_reporter *reporter;
5163         int err;
5164
5165         reporter = devlink_health_reporter_get_from_info(devlink, info);
5166         if (!reporter)
5167                 return -EINVAL;
5168
5169         if (!reporter->ops->recover &&
5170             (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
5171              info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])) {
5172                 err = -EOPNOTSUPP;
5173                 goto out;
5174         }
5175
5176         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
5177                 reporter->graceful_period =
5178                         nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
5179
5180         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
5181                 reporter->auto_recover =
5182                         nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
5183
5184         devlink_health_reporter_put(reporter);
5185         return 0;
5186 out:
5187         devlink_health_reporter_put(reporter);
5188         return err;
5189 }
5190
5191 static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
5192                                                        struct genl_info *info)
5193 {
5194         struct devlink *devlink = info->user_ptr[0];
5195         struct devlink_health_reporter *reporter;
5196         int err;
5197
5198         reporter = devlink_health_reporter_get_from_info(devlink, info);
5199         if (!reporter)
5200                 return -EINVAL;
5201
5202         err = devlink_health_reporter_recover(reporter, NULL, info->extack);
5203
5204         devlink_health_reporter_put(reporter);
5205         return err;
5206 }
5207
5208 static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
5209                                                         struct genl_info *info)
5210 {
5211         struct devlink *devlink = info->user_ptr[0];
5212         struct devlink_health_reporter *reporter;
5213         struct devlink_fmsg *fmsg;
5214         int err;
5215
5216         reporter = devlink_health_reporter_get_from_info(devlink, info);
5217         if (!reporter)
5218                 return -EINVAL;
5219
5220         if (!reporter->ops->diagnose) {
5221                 devlink_health_reporter_put(reporter);
5222                 return -EOPNOTSUPP;
5223         }
5224
5225         fmsg = devlink_fmsg_alloc();
5226         if (!fmsg) {
5227                 devlink_health_reporter_put(reporter);
5228                 return -ENOMEM;
5229         }
5230
5231         err = devlink_fmsg_obj_nest_start(fmsg);
5232         if (err)
5233                 goto out;
5234
5235         err = reporter->ops->diagnose(reporter, fmsg, info->extack);
5236         if (err)
5237                 goto out;
5238
5239         err = devlink_fmsg_obj_nest_end(fmsg);
5240         if (err)
5241                 goto out;
5242
5243         err = devlink_fmsg_snd(fmsg, info,
5244                                DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
5245
5246 out:
5247         devlink_fmsg_free(fmsg);
5248         devlink_health_reporter_put(reporter);
5249         return err;
5250 }
5251
5252 static int
5253 devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
5254                                                struct netlink_callback *cb)
5255 {
5256         struct devlink_health_reporter *reporter;
5257         u64 start = cb->args[0];
5258         int err;
5259
5260         reporter = devlink_health_reporter_get_from_cb(cb);
5261         if (!reporter)
5262                 return -EINVAL;
5263
5264         if (!reporter->ops->dump) {
5265                 err = -EOPNOTSUPP;
5266                 goto out;
5267         }
5268         mutex_lock(&reporter->dump_lock);
5269         if (!start) {
5270                 err = devlink_health_do_dump(reporter, NULL, cb->extack);
5271                 if (err)
5272                         goto unlock;
5273                 cb->args[1] = reporter->dump_ts;
5274         }
5275         if (!reporter->dump_fmsg || cb->args[1] != reporter->dump_ts) {
5276                 NL_SET_ERR_MSG_MOD(cb->extack, "Dump trampled, please retry");
5277                 err = -EAGAIN;
5278                 goto unlock;
5279         }
5280
5281         err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
5282                                   DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
5283 unlock:
5284         mutex_unlock(&reporter->dump_lock);
5285 out:
5286         devlink_health_reporter_put(reporter);
5287         return err;
5288 }
5289
5290 static int
5291 devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
5292                                                struct genl_info *info)
5293 {
5294         struct devlink *devlink = info->user_ptr[0];
5295         struct devlink_health_reporter *reporter;
5296
5297         reporter = devlink_health_reporter_get_from_info(devlink, info);
5298         if (!reporter)
5299                 return -EINVAL;
5300
5301         if (!reporter->ops->dump) {
5302                 devlink_health_reporter_put(reporter);
5303                 return -EOPNOTSUPP;
5304         }
5305
5306         mutex_lock(&reporter->dump_lock);
5307         devlink_health_dump_clear(reporter);
5308         mutex_unlock(&reporter->dump_lock);
5309         devlink_health_reporter_put(reporter);
5310         return 0;
5311 }
5312
5313 struct devlink_stats {
5314         u64 rx_bytes;
5315         u64 rx_packets;
5316         struct u64_stats_sync syncp;
5317 };
5318
5319 /**
5320  * struct devlink_trap_group_item - Packet trap group attributes.
5321  * @group: Immutable packet trap group attributes.
5322  * @refcount: Number of trap items using the group.
5323  * @list: trap_group_list member.
5324  * @stats: Trap group statistics.
5325  *
5326  * Describes packet trap group attributes. Created by devlink during trap
5327  * registration.
5328  */
5329 struct devlink_trap_group_item {
5330         const struct devlink_trap_group *group;
5331         refcount_t refcount;
5332         struct list_head list;
5333         struct devlink_stats __percpu *stats;
5334 };
5335
5336 /**
5337  * struct devlink_trap_item - Packet trap attributes.
5338  * @trap: Immutable packet trap attributes.
5339  * @group_item: Associated group item.
5340  * @list: trap_list member.
5341  * @action: Trap action.
5342  * @stats: Trap statistics.
5343  * @priv: Driver private information.
5344  *
5345  * Describes both mutable and immutable packet trap attributes. Created by
5346  * devlink during trap registration and used for all trap related operations.
5347  */
5348 struct devlink_trap_item {
5349         const struct devlink_trap *trap;
5350         struct devlink_trap_group_item *group_item;
5351         struct list_head list;
5352         enum devlink_trap_action action;
5353         struct devlink_stats __percpu *stats;
5354         void *priv;
5355 };
5356
5357 static struct devlink_trap_item *
5358 devlink_trap_item_lookup(struct devlink *devlink, const char *name)
5359 {
5360         struct devlink_trap_item *trap_item;
5361
5362         list_for_each_entry(trap_item, &devlink->trap_list, list) {
5363                 if (!strcmp(trap_item->trap->name, name))
5364                         return trap_item;
5365         }
5366
5367         return NULL;
5368 }
5369
5370 static struct devlink_trap_item *
5371 devlink_trap_item_get_from_info(struct devlink *devlink,
5372                                 struct genl_info *info)
5373 {
5374         struct nlattr *attr;
5375
5376         if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
5377                 return NULL;
5378         attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
5379
5380         return devlink_trap_item_lookup(devlink, nla_data(attr));
5381 }
5382
5383 static int
5384 devlink_trap_action_get_from_info(struct genl_info *info,
5385                                   enum devlink_trap_action *p_trap_action)
5386 {
5387         u8 val;
5388
5389         val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
5390         switch (val) {
5391         case DEVLINK_TRAP_ACTION_DROP: /* fall-through */
5392         case DEVLINK_TRAP_ACTION_TRAP:
5393                 *p_trap_action = val;
5394                 break;
5395         default:
5396                 return -EINVAL;
5397         }
5398
5399         return 0;
5400 }
5401
5402 static int devlink_trap_metadata_put(struct sk_buff *msg,
5403                                      const struct devlink_trap *trap)
5404 {
5405         struct nlattr *attr;
5406
5407         attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
5408         if (!attr)
5409                 return -EMSGSIZE;
5410
5411         if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
5412             nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
5413                 goto nla_put_failure;
5414
5415         nla_nest_end(msg, attr);
5416
5417         return 0;
5418
5419 nla_put_failure:
5420         nla_nest_cancel(msg, attr);
5421         return -EMSGSIZE;
5422 }
5423
5424 static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
5425                                     struct devlink_stats *stats)
5426 {
5427         int i;
5428
5429         memset(stats, 0, sizeof(*stats));
5430         for_each_possible_cpu(i) {
5431                 struct devlink_stats *cpu_stats;
5432                 u64 rx_packets, rx_bytes;
5433                 unsigned int start;
5434
5435                 cpu_stats = per_cpu_ptr(trap_stats, i);
5436                 do {
5437                         start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
5438                         rx_packets = cpu_stats->rx_packets;
5439                         rx_bytes = cpu_stats->rx_bytes;
5440                 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
5441
5442                 stats->rx_packets += rx_packets;
5443                 stats->rx_bytes += rx_bytes;
5444         }
5445 }
5446
5447 static int devlink_trap_stats_put(struct sk_buff *msg,
5448                                   struct devlink_stats __percpu *trap_stats)
5449 {
5450         struct devlink_stats stats;
5451         struct nlattr *attr;
5452
5453         devlink_trap_stats_read(trap_stats, &stats);
5454
5455         attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
5456         if (!attr)
5457                 return -EMSGSIZE;
5458
5459         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
5460                               stats.rx_packets, DEVLINK_ATTR_PAD))
5461                 goto nla_put_failure;
5462
5463         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
5464                               stats.rx_bytes, DEVLINK_ATTR_PAD))
5465                 goto nla_put_failure;
5466
5467         nla_nest_end(msg, attr);
5468
5469         return 0;
5470
5471 nla_put_failure:
5472         nla_nest_cancel(msg, attr);
5473         return -EMSGSIZE;
5474 }
5475
5476 static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
5477                                 const struct devlink_trap_item *trap_item,
5478                                 enum devlink_command cmd, u32 portid, u32 seq,
5479                                 int flags)
5480 {
5481         struct devlink_trap_group_item *group_item = trap_item->group_item;
5482         void *hdr;
5483         int err;
5484
5485         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5486         if (!hdr)
5487                 return -EMSGSIZE;
5488
5489         if (devlink_nl_put_handle(msg, devlink))
5490                 goto nla_put_failure;
5491
5492         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5493                            group_item->group->name))
5494                 goto nla_put_failure;
5495
5496         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
5497                 goto nla_put_failure;
5498
5499         if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
5500                 goto nla_put_failure;
5501
5502         if (trap_item->trap->generic &&
5503             nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5504                 goto nla_put_failure;
5505
5506         if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
5507                 goto nla_put_failure;
5508
5509         err = devlink_trap_metadata_put(msg, trap_item->trap);
5510         if (err)
5511                 goto nla_put_failure;
5512
5513         err = devlink_trap_stats_put(msg, trap_item->stats);
5514         if (err)
5515                 goto nla_put_failure;
5516
5517         genlmsg_end(msg, hdr);
5518
5519         return 0;
5520
5521 nla_put_failure:
5522         genlmsg_cancel(msg, hdr);
5523         return -EMSGSIZE;
5524 }
5525
5526 static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb,
5527                                         struct genl_info *info)
5528 {
5529         struct netlink_ext_ack *extack = info->extack;
5530         struct devlink *devlink = info->user_ptr[0];
5531         struct devlink_trap_item *trap_item;
5532         struct sk_buff *msg;
5533         int err;
5534
5535         if (list_empty(&devlink->trap_list))
5536                 return -EOPNOTSUPP;
5537
5538         trap_item = devlink_trap_item_get_from_info(devlink, info);
5539         if (!trap_item) {
5540                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
5541                 return -ENOENT;
5542         }
5543
5544         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5545         if (!msg)
5546                 return -ENOMEM;
5547
5548         err = devlink_nl_trap_fill(msg, devlink, trap_item,
5549                                    DEVLINK_CMD_TRAP_NEW, info->snd_portid,
5550                                    info->snd_seq, 0);
5551         if (err)
5552                 goto err_trap_fill;
5553
5554         return genlmsg_reply(msg, info);
5555
5556 err_trap_fill:
5557         nlmsg_free(msg);
5558         return err;
5559 }
5560
5561 static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
5562                                           struct netlink_callback *cb)
5563 {
5564         struct devlink_trap_item *trap_item;
5565         struct devlink *devlink;
5566         int start = cb->args[0];
5567         int idx = 0;
5568         int err;
5569
5570         mutex_lock(&devlink_mutex);
5571         list_for_each_entry(devlink, &devlink_list, list) {
5572                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5573                         continue;
5574                 mutex_lock(&devlink->lock);
5575                 list_for_each_entry(trap_item, &devlink->trap_list, list) {
5576                         if (idx < start) {
5577                                 idx++;
5578                                 continue;
5579                         }
5580                         err = devlink_nl_trap_fill(msg, devlink, trap_item,
5581                                                    DEVLINK_CMD_TRAP_NEW,
5582                                                    NETLINK_CB(cb->skb).portid,
5583                                                    cb->nlh->nlmsg_seq,
5584                                                    NLM_F_MULTI);
5585                         if (err) {
5586                                 mutex_unlock(&devlink->lock);
5587                                 goto out;
5588                         }
5589                         idx++;
5590                 }
5591                 mutex_unlock(&devlink->lock);
5592         }
5593 out:
5594         mutex_unlock(&devlink_mutex);
5595
5596         cb->args[0] = idx;
5597         return msg->len;
5598 }
5599
5600 static int __devlink_trap_action_set(struct devlink *devlink,
5601                                      struct devlink_trap_item *trap_item,
5602                                      enum devlink_trap_action trap_action,
5603                                      struct netlink_ext_ack *extack)
5604 {
5605         int err;
5606
5607         if (trap_item->action != trap_action &&
5608             trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
5609                 NL_SET_ERR_MSG_MOD(extack, "Cannot change action of non-drop traps. Skipping");
5610                 return 0;
5611         }
5612
5613         err = devlink->ops->trap_action_set(devlink, trap_item->trap,
5614                                             trap_action);
5615         if (err)
5616                 return err;
5617
5618         trap_item->action = trap_action;
5619
5620         return 0;
5621 }
5622
5623 static int devlink_trap_action_set(struct devlink *devlink,
5624                                    struct devlink_trap_item *trap_item,
5625                                    struct genl_info *info)
5626 {
5627         enum devlink_trap_action trap_action;
5628         int err;
5629
5630         if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
5631                 return 0;
5632
5633         err = devlink_trap_action_get_from_info(info, &trap_action);
5634         if (err) {
5635                 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
5636                 return -EINVAL;
5637         }
5638
5639         return __devlink_trap_action_set(devlink, trap_item, trap_action,
5640                                          info->extack);
5641 }
5642
5643 static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb,
5644                                         struct genl_info *info)
5645 {
5646         struct netlink_ext_ack *extack = info->extack;
5647         struct devlink *devlink = info->user_ptr[0];
5648         struct devlink_trap_item *trap_item;
5649         int err;
5650
5651         if (list_empty(&devlink->trap_list))
5652                 return -EOPNOTSUPP;
5653
5654         trap_item = devlink_trap_item_get_from_info(devlink, info);
5655         if (!trap_item) {
5656                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
5657                 return -ENOENT;
5658         }
5659
5660         err = devlink_trap_action_set(devlink, trap_item, info);
5661         if (err)
5662                 return err;
5663
5664         return 0;
5665 }
5666
5667 static struct devlink_trap_group_item *
5668 devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
5669 {
5670         struct devlink_trap_group_item *group_item;
5671
5672         list_for_each_entry(group_item, &devlink->trap_group_list, list) {
5673                 if (!strcmp(group_item->group->name, name))
5674                         return group_item;
5675         }
5676
5677         return NULL;
5678 }
5679
5680 static struct devlink_trap_group_item *
5681 devlink_trap_group_item_get_from_info(struct devlink *devlink,
5682                                       struct genl_info *info)
5683 {
5684         char *name;
5685
5686         if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
5687                 return NULL;
5688         name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
5689
5690         return devlink_trap_group_item_lookup(devlink, name);
5691 }
5692
5693 static int
5694 devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
5695                            const struct devlink_trap_group_item *group_item,
5696                            enum devlink_command cmd, u32 portid, u32 seq,
5697                            int flags)
5698 {
5699         void *hdr;
5700         int err;
5701
5702         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5703         if (!hdr)
5704                 return -EMSGSIZE;
5705
5706         if (devlink_nl_put_handle(msg, devlink))
5707                 goto nla_put_failure;
5708
5709         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5710                            group_item->group->name))
5711                 goto nla_put_failure;
5712
5713         if (group_item->group->generic &&
5714             nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5715                 goto nla_put_failure;
5716
5717         err = devlink_trap_stats_put(msg, group_item->stats);
5718         if (err)
5719                 goto nla_put_failure;
5720
5721         genlmsg_end(msg, hdr);
5722
5723         return 0;
5724
5725 nla_put_failure:
5726         genlmsg_cancel(msg, hdr);
5727         return -EMSGSIZE;
5728 }
5729
5730 static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb,
5731                                               struct genl_info *info)
5732 {
5733         struct netlink_ext_ack *extack = info->extack;
5734         struct devlink *devlink = info->user_ptr[0];
5735         struct devlink_trap_group_item *group_item;
5736         struct sk_buff *msg;
5737         int err;
5738
5739         if (list_empty(&devlink->trap_group_list))
5740                 return -EOPNOTSUPP;
5741
5742         group_item = devlink_trap_group_item_get_from_info(devlink, info);
5743         if (!group_item) {
5744                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
5745                 return -ENOENT;
5746         }
5747
5748         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5749         if (!msg)
5750                 return -ENOMEM;
5751
5752         err = devlink_nl_trap_group_fill(msg, devlink, group_item,
5753                                          DEVLINK_CMD_TRAP_GROUP_NEW,
5754                                          info->snd_portid, info->snd_seq, 0);
5755         if (err)
5756                 goto err_trap_group_fill;
5757
5758         return genlmsg_reply(msg, info);
5759
5760 err_trap_group_fill:
5761         nlmsg_free(msg);
5762         return err;
5763 }
5764
5765 static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
5766                                                 struct netlink_callback *cb)
5767 {
5768         enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW;
5769         struct devlink_trap_group_item *group_item;
5770         u32 portid = NETLINK_CB(cb->skb).portid;
5771         struct devlink *devlink;
5772         int start = cb->args[0];
5773         int idx = 0;
5774         int err;
5775
5776         mutex_lock(&devlink_mutex);
5777         list_for_each_entry(devlink, &devlink_list, list) {
5778                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5779                         continue;
5780                 mutex_lock(&devlink->lock);
5781                 list_for_each_entry(group_item, &devlink->trap_group_list,
5782                                     list) {
5783                         if (idx < start) {
5784                                 idx++;
5785                                 continue;
5786                         }
5787                         err = devlink_nl_trap_group_fill(msg, devlink,
5788                                                          group_item, cmd,
5789                                                          portid,
5790                                                          cb->nlh->nlmsg_seq,
5791                                                          NLM_F_MULTI);
5792                         if (err) {
5793                                 mutex_unlock(&devlink->lock);
5794                                 goto out;
5795                         }
5796                         idx++;
5797                 }
5798                 mutex_unlock(&devlink->lock);
5799         }
5800 out:
5801         mutex_unlock(&devlink_mutex);
5802
5803         cb->args[0] = idx;
5804         return msg->len;
5805 }
5806
5807 static int
5808 __devlink_trap_group_action_set(struct devlink *devlink,
5809                                 struct devlink_trap_group_item *group_item,
5810                                 enum devlink_trap_action trap_action,
5811                                 struct netlink_ext_ack *extack)
5812 {
5813         const char *group_name = group_item->group->name;
5814         struct devlink_trap_item *trap_item;
5815         int err;
5816
5817         list_for_each_entry(trap_item, &devlink->trap_list, list) {
5818                 if (strcmp(trap_item->trap->group.name, group_name))
5819                         continue;
5820                 err = __devlink_trap_action_set(devlink, trap_item,
5821                                                 trap_action, extack);
5822                 if (err)
5823                         return err;
5824         }
5825
5826         return 0;
5827 }
5828
5829 static int
5830 devlink_trap_group_action_set(struct devlink *devlink,
5831                               struct devlink_trap_group_item *group_item,
5832                               struct genl_info *info)
5833 {
5834         enum devlink_trap_action trap_action;
5835         int err;
5836
5837         if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
5838                 return 0;
5839
5840         err = devlink_trap_action_get_from_info(info, &trap_action);
5841         if (err) {
5842                 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
5843                 return -EINVAL;
5844         }
5845
5846         err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
5847                                               info->extack);
5848         if (err)
5849                 return err;
5850
5851         return 0;
5852 }
5853
5854 static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
5855                                               struct genl_info *info)
5856 {
5857         struct netlink_ext_ack *extack = info->extack;
5858         struct devlink *devlink = info->user_ptr[0];
5859         struct devlink_trap_group_item *group_item;
5860         int err;
5861
5862         if (list_empty(&devlink->trap_group_list))
5863                 return -EOPNOTSUPP;
5864
5865         group_item = devlink_trap_group_item_get_from_info(devlink, info);
5866         if (!group_item) {
5867                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
5868                 return -ENOENT;
5869         }
5870
5871         err = devlink_trap_group_action_set(devlink, group_item, info);
5872         if (err)
5873                 return err;
5874
5875         return 0;
5876 }
5877
5878 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
5879         [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
5880         [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
5881         [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
5882         [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
5883         [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
5884         [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
5885         [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
5886         [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
5887         [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
5888         [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
5889         [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
5890         [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
5891         [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
5892         [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
5893         [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
5894         [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
5895         [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
5896         [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
5897         [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
5898         [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
5899         [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
5900         [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
5901         [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
5902         [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
5903         [DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },
5904         [DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },
5905         [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
5906         [DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
5907         [DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
5908         [DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING },
5909         [DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 },
5910         [DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING },
5911         [DEVLINK_ATTR_NETNS_PID] = { .type = NLA_U32 },
5912         [DEVLINK_ATTR_NETNS_FD] = { .type = NLA_U32 },
5913         [DEVLINK_ATTR_NETNS_ID] = { .type = NLA_U32 },
5914 };
5915
5916 static const struct genl_ops devlink_nl_ops[] = {
5917         {
5918                 .cmd = DEVLINK_CMD_GET,
5919                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5920                 .doit = devlink_nl_cmd_get_doit,
5921                 .dumpit = devlink_nl_cmd_get_dumpit,
5922                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
5923                 /* can be retrieved by unprivileged users */
5924         },
5925         {
5926                 .cmd = DEVLINK_CMD_PORT_GET,
5927                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5928                 .doit = devlink_nl_cmd_port_get_doit,
5929                 .dumpit = devlink_nl_cmd_port_get_dumpit,
5930                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5931                 /* can be retrieved by unprivileged users */
5932         },
5933         {
5934                 .cmd = DEVLINK_CMD_PORT_SET,
5935                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5936                 .doit = devlink_nl_cmd_port_set_doit,
5937                 .flags = GENL_ADMIN_PERM,
5938                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
5939         },
5940         {
5941                 .cmd = DEVLINK_CMD_PORT_SPLIT,
5942                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5943                 .doit = devlink_nl_cmd_port_split_doit,
5944                 .flags = GENL_ADMIN_PERM,
5945                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5946                                   DEVLINK_NL_FLAG_NO_LOCK,
5947         },
5948         {
5949                 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
5950                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5951                 .doit = devlink_nl_cmd_port_unsplit_doit,
5952                 .flags = GENL_ADMIN_PERM,
5953                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5954                                   DEVLINK_NL_FLAG_NO_LOCK,
5955         },
5956         {
5957                 .cmd = DEVLINK_CMD_SB_GET,
5958                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5959                 .doit = devlink_nl_cmd_sb_get_doit,
5960                 .dumpit = devlink_nl_cmd_sb_get_dumpit,
5961                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5962                                   DEVLINK_NL_FLAG_NEED_SB,
5963                 /* can be retrieved by unprivileged users */
5964         },
5965         {
5966                 .cmd = DEVLINK_CMD_SB_POOL_GET,
5967                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5968                 .doit = devlink_nl_cmd_sb_pool_get_doit,
5969                 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
5970                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5971                                   DEVLINK_NL_FLAG_NEED_SB,
5972                 /* can be retrieved by unprivileged users */
5973         },
5974         {
5975                 .cmd = DEVLINK_CMD_SB_POOL_SET,
5976                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5977                 .doit = devlink_nl_cmd_sb_pool_set_doit,
5978                 .flags = GENL_ADMIN_PERM,
5979                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
5980                                   DEVLINK_NL_FLAG_NEED_SB,
5981         },
5982         {
5983                 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
5984                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5985                 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
5986                 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
5987                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5988                                   DEVLINK_NL_FLAG_NEED_SB,
5989                 /* can be retrieved by unprivileged users */
5990         },
5991         {
5992                 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
5993                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
5994                 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
5995                 .flags = GENL_ADMIN_PERM,
5996                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
5997                                   DEVLINK_NL_FLAG_NEED_SB,
5998         },
5999         {
6000                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
6001                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6002                 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
6003                 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
6004                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6005                                   DEVLINK_NL_FLAG_NEED_SB,
6006                 /* can be retrieved by unprivileged users */
6007         },
6008         {
6009                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
6010                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6011                 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
6012                 .flags = GENL_ADMIN_PERM,
6013                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6014                                   DEVLINK_NL_FLAG_NEED_SB,
6015         },
6016         {
6017                 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
6018                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6019                 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
6020                 .flags = GENL_ADMIN_PERM,
6021                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6022                                   DEVLINK_NL_FLAG_NEED_SB,
6023         },
6024         {
6025                 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
6026                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6027                 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
6028                 .flags = GENL_ADMIN_PERM,
6029                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6030                                   DEVLINK_NL_FLAG_NEED_SB,
6031         },
6032         {
6033                 .cmd = DEVLINK_CMD_ESWITCH_GET,
6034                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6035                 .doit = devlink_nl_cmd_eswitch_get_doit,
6036                 .flags = GENL_ADMIN_PERM,
6037                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6038         },
6039         {
6040                 .cmd = DEVLINK_CMD_ESWITCH_SET,
6041                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6042                 .doit = devlink_nl_cmd_eswitch_set_doit,
6043                 .flags = GENL_ADMIN_PERM,
6044                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6045                                   DEVLINK_NL_FLAG_NO_LOCK,
6046         },
6047         {
6048                 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
6049                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6050                 .doit = devlink_nl_cmd_dpipe_table_get,
6051                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6052                 /* can be retrieved by unprivileged users */
6053         },
6054         {
6055                 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
6056                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6057                 .doit = devlink_nl_cmd_dpipe_entries_get,
6058                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6059                 /* can be retrieved by unprivileged users */
6060         },
6061         {
6062                 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
6063                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6064                 .doit = devlink_nl_cmd_dpipe_headers_get,
6065                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6066                 /* can be retrieved by unprivileged users */
6067         },
6068         {
6069                 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
6070                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6071                 .doit = devlink_nl_cmd_dpipe_table_counters_set,
6072                 .flags = GENL_ADMIN_PERM,
6073                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6074         },
6075         {
6076                 .cmd = DEVLINK_CMD_RESOURCE_SET,
6077                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6078                 .doit = devlink_nl_cmd_resource_set,
6079                 .flags = GENL_ADMIN_PERM,
6080                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6081         },
6082         {
6083                 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
6084                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6085                 .doit = devlink_nl_cmd_resource_dump,
6086                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6087                 /* can be retrieved by unprivileged users */
6088         },
6089         {
6090                 .cmd = DEVLINK_CMD_RELOAD,
6091                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6092                 .doit = devlink_nl_cmd_reload,
6093                 .flags = GENL_ADMIN_PERM,
6094                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6095                                   DEVLINK_NL_FLAG_NO_LOCK,
6096         },
6097         {
6098                 .cmd = DEVLINK_CMD_PARAM_GET,
6099                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6100                 .doit = devlink_nl_cmd_param_get_doit,
6101                 .dumpit = devlink_nl_cmd_param_get_dumpit,
6102                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6103                 /* can be retrieved by unprivileged users */
6104         },
6105         {
6106                 .cmd = DEVLINK_CMD_PARAM_SET,
6107                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6108                 .doit = devlink_nl_cmd_param_set_doit,
6109                 .flags = GENL_ADMIN_PERM,
6110                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6111         },
6112         {
6113                 .cmd = DEVLINK_CMD_PORT_PARAM_GET,
6114                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6115                 .doit = devlink_nl_cmd_port_param_get_doit,
6116                 .dumpit = devlink_nl_cmd_port_param_get_dumpit,
6117                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6118                 /* can be retrieved by unprivileged users */
6119         },
6120         {
6121                 .cmd = DEVLINK_CMD_PORT_PARAM_SET,
6122                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6123                 .doit = devlink_nl_cmd_port_param_set_doit,
6124                 .flags = GENL_ADMIN_PERM,
6125                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6126         },
6127         {
6128                 .cmd = DEVLINK_CMD_REGION_GET,
6129                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6130                 .doit = devlink_nl_cmd_region_get_doit,
6131                 .dumpit = devlink_nl_cmd_region_get_dumpit,
6132                 .flags = GENL_ADMIN_PERM,
6133                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6134         },
6135         {
6136                 .cmd = DEVLINK_CMD_REGION_DEL,
6137                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6138                 .doit = devlink_nl_cmd_region_del,
6139                 .flags = GENL_ADMIN_PERM,
6140                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6141         },
6142         {
6143                 .cmd = DEVLINK_CMD_REGION_READ,
6144                 .validate = GENL_DONT_VALIDATE_STRICT |
6145                             GENL_DONT_VALIDATE_DUMP_STRICT,
6146                 .dumpit = devlink_nl_cmd_region_read_dumpit,
6147                 .flags = GENL_ADMIN_PERM,
6148                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6149         },
6150         {
6151                 .cmd = DEVLINK_CMD_INFO_GET,
6152                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6153                 .doit = devlink_nl_cmd_info_get_doit,
6154                 .dumpit = devlink_nl_cmd_info_get_dumpit,
6155                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6156                 /* can be retrieved by unprivileged users */
6157         },
6158         {
6159                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
6160                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6161                 .doit = devlink_nl_cmd_health_reporter_get_doit,
6162                 .dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
6163                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6164                                   DEVLINK_NL_FLAG_NO_LOCK,
6165                 /* can be retrieved by unprivileged users */
6166         },
6167         {
6168                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
6169                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6170                 .doit = devlink_nl_cmd_health_reporter_set_doit,
6171                 .flags = GENL_ADMIN_PERM,
6172                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6173                                   DEVLINK_NL_FLAG_NO_LOCK,
6174         },
6175         {
6176                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
6177                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6178                 .doit = devlink_nl_cmd_health_reporter_recover_doit,
6179                 .flags = GENL_ADMIN_PERM,
6180                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6181                                   DEVLINK_NL_FLAG_NO_LOCK,
6182         },
6183         {
6184                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
6185                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6186                 .doit = devlink_nl_cmd_health_reporter_diagnose_doit,
6187                 .flags = GENL_ADMIN_PERM,
6188                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6189                                   DEVLINK_NL_FLAG_NO_LOCK,
6190         },
6191         {
6192                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
6193                 .validate = GENL_DONT_VALIDATE_STRICT |
6194                             GENL_DONT_VALIDATE_DUMP_STRICT,
6195                 .dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
6196                 .flags = GENL_ADMIN_PERM,
6197                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6198                                   DEVLINK_NL_FLAG_NO_LOCK,
6199         },
6200         {
6201                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
6202                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6203                 .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
6204                 .flags = GENL_ADMIN_PERM,
6205                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6206                                   DEVLINK_NL_FLAG_NO_LOCK,
6207         },
6208         {
6209                 .cmd = DEVLINK_CMD_FLASH_UPDATE,
6210                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6211                 .doit = devlink_nl_cmd_flash_update,
6212                 .flags = GENL_ADMIN_PERM,
6213                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6214         },
6215         {
6216                 .cmd = DEVLINK_CMD_TRAP_GET,
6217                 .doit = devlink_nl_cmd_trap_get_doit,
6218                 .dumpit = devlink_nl_cmd_trap_get_dumpit,
6219                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6220                 /* can be retrieved by unprivileged users */
6221         },
6222         {
6223                 .cmd = DEVLINK_CMD_TRAP_SET,
6224                 .doit = devlink_nl_cmd_trap_set_doit,
6225                 .flags = GENL_ADMIN_PERM,
6226                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6227         },
6228         {
6229                 .cmd = DEVLINK_CMD_TRAP_GROUP_GET,
6230                 .doit = devlink_nl_cmd_trap_group_get_doit,
6231                 .dumpit = devlink_nl_cmd_trap_group_get_dumpit,
6232                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6233                 /* can be retrieved by unprivileged users */
6234         },
6235         {
6236                 .cmd = DEVLINK_CMD_TRAP_GROUP_SET,
6237                 .doit = devlink_nl_cmd_trap_group_set_doit,
6238                 .flags = GENL_ADMIN_PERM,
6239                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6240         },
6241 };
6242
6243 static struct genl_family devlink_nl_family __ro_after_init = {
6244         .name           = DEVLINK_GENL_NAME,
6245         .version        = DEVLINK_GENL_VERSION,
6246         .maxattr        = DEVLINK_ATTR_MAX,
6247         .policy = devlink_nl_policy,
6248         .netnsok        = true,
6249         .pre_doit       = devlink_nl_pre_doit,
6250         .post_doit      = devlink_nl_post_doit,
6251         .module         = THIS_MODULE,
6252         .ops            = devlink_nl_ops,
6253         .n_ops          = ARRAY_SIZE(devlink_nl_ops),
6254         .mcgrps         = devlink_nl_mcgrps,
6255         .n_mcgrps       = ARRAY_SIZE(devlink_nl_mcgrps),
6256 };
6257
6258 /**
6259  *      devlink_alloc - Allocate new devlink instance resources
6260  *
6261  *      @ops: ops
6262  *      @priv_size: size of user private data
6263  *
6264  *      Allocate new devlink instance resources, including devlink index
6265  *      and name.
6266  */
6267 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
6268 {
6269         struct devlink *devlink;
6270
6271         if (WARN_ON(!ops))
6272                 return NULL;
6273
6274         devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
6275         if (!devlink)
6276                 return NULL;
6277         devlink->ops = ops;
6278         __devlink_net_set(devlink, &init_net);
6279         INIT_LIST_HEAD(&devlink->port_list);
6280         INIT_LIST_HEAD(&devlink->sb_list);
6281         INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
6282         INIT_LIST_HEAD(&devlink->resource_list);
6283         INIT_LIST_HEAD(&devlink->param_list);
6284         INIT_LIST_HEAD(&devlink->region_list);
6285         INIT_LIST_HEAD(&devlink->reporter_list);
6286         INIT_LIST_HEAD(&devlink->trap_list);
6287         INIT_LIST_HEAD(&devlink->trap_group_list);
6288         mutex_init(&devlink->lock);
6289         mutex_init(&devlink->reporters_lock);
6290         return devlink;
6291 }
6292 EXPORT_SYMBOL_GPL(devlink_alloc);
6293
6294 /**
6295  *      devlink_register - Register devlink instance
6296  *
6297  *      @devlink: devlink
6298  *      @dev: parent device
6299  */
6300 int devlink_register(struct devlink *devlink, struct device *dev)
6301 {
6302         mutex_lock(&devlink_mutex);
6303         devlink->dev = dev;
6304         devlink->registered = true;
6305         list_add_tail(&devlink->list, &devlink_list);
6306         devlink_notify(devlink, DEVLINK_CMD_NEW);
6307         mutex_unlock(&devlink_mutex);
6308         return 0;
6309 }
6310 EXPORT_SYMBOL_GPL(devlink_register);
6311
6312 /**
6313  *      devlink_unregister - Unregister devlink instance
6314  *
6315  *      @devlink: devlink
6316  */
6317 void devlink_unregister(struct devlink *devlink)
6318 {
6319         mutex_lock(&devlink_mutex);
6320         WARN_ON(devlink_reload_supported(devlink) &&
6321                 devlink->reload_enabled);
6322         devlink_notify(devlink, DEVLINK_CMD_DEL);
6323         list_del(&devlink->list);
6324         mutex_unlock(&devlink_mutex);
6325 }
6326 EXPORT_SYMBOL_GPL(devlink_unregister);
6327
6328 /**
6329  *      devlink_reload_enable - Enable reload of devlink instance
6330  *
6331  *      @devlink: devlink
6332  *
6333  *      Should be called at end of device initialization
6334  *      process when reload operation is supported.
6335  */
6336 void devlink_reload_enable(struct devlink *devlink)
6337 {
6338         mutex_lock(&devlink_mutex);
6339         devlink->reload_enabled = true;
6340         mutex_unlock(&devlink_mutex);
6341 }
6342 EXPORT_SYMBOL_GPL(devlink_reload_enable);
6343
6344 /**
6345  *      devlink_reload_disable - Disable reload of devlink instance
6346  *
6347  *      @devlink: devlink
6348  *
6349  *      Should be called at the beginning of device cleanup
6350  *      process when reload operation is supported.
6351  */
6352 void devlink_reload_disable(struct devlink *devlink)
6353 {
6354         mutex_lock(&devlink_mutex);
6355         /* Mutex is taken which ensures that no reload operation is in
6356          * progress while setting up forbidded flag.
6357          */
6358         devlink->reload_enabled = false;
6359         mutex_unlock(&devlink_mutex);
6360 }
6361 EXPORT_SYMBOL_GPL(devlink_reload_disable);
6362
6363 /**
6364  *      devlink_free - Free devlink instance resources
6365  *
6366  *      @devlink: devlink
6367  */
6368 void devlink_free(struct devlink *devlink)
6369 {
6370         mutex_destroy(&devlink->reporters_lock);
6371         mutex_destroy(&devlink->lock);
6372         WARN_ON(!list_empty(&devlink->trap_group_list));
6373         WARN_ON(!list_empty(&devlink->trap_list));
6374         WARN_ON(!list_empty(&devlink->reporter_list));
6375         WARN_ON(!list_empty(&devlink->region_list));
6376         WARN_ON(!list_empty(&devlink->param_list));
6377         WARN_ON(!list_empty(&devlink->resource_list));
6378         WARN_ON(!list_empty(&devlink->dpipe_table_list));
6379         WARN_ON(!list_empty(&devlink->sb_list));
6380         WARN_ON(!list_empty(&devlink->port_list));
6381
6382         kfree(devlink);
6383 }
6384 EXPORT_SYMBOL_GPL(devlink_free);
6385
6386 static void devlink_port_type_warn(struct work_struct *work)
6387 {
6388         WARN(true, "Type was not set for devlink port.");
6389 }
6390
6391 static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
6392 {
6393         /* Ignore CPU and DSA flavours. */
6394         return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
6395                devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA;
6396 }
6397
6398 #define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 30)
6399
6400 static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
6401 {
6402         if (!devlink_port_type_should_warn(devlink_port))
6403                 return;
6404         /* Schedule a work to WARN in case driver does not set port
6405          * type within timeout.
6406          */
6407         schedule_delayed_work(&devlink_port->type_warn_dw,
6408                               DEVLINK_PORT_TYPE_WARN_TIMEOUT);
6409 }
6410
6411 static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
6412 {
6413         if (!devlink_port_type_should_warn(devlink_port))
6414                 return;
6415         cancel_delayed_work_sync(&devlink_port->type_warn_dw);
6416 }
6417
6418 /**
6419  *      devlink_port_register - Register devlink port
6420  *
6421  *      @devlink: devlink
6422  *      @devlink_port: devlink port
6423  *      @port_index: driver-specific numerical identifier of the port
6424  *
6425  *      Register devlink port with provided port index. User can use
6426  *      any indexing, even hw-related one. devlink_port structure
6427  *      is convenient to be embedded inside user driver private structure.
6428  *      Note that the caller should take care of zeroing the devlink_port
6429  *      structure.
6430  */
6431 int devlink_port_register(struct devlink *devlink,
6432                           struct devlink_port *devlink_port,
6433                           unsigned int port_index)
6434 {
6435         mutex_lock(&devlink->lock);
6436         if (devlink_port_index_exists(devlink, port_index)) {
6437                 mutex_unlock(&devlink->lock);
6438                 return -EEXIST;
6439         }
6440         devlink_port->devlink = devlink;
6441         devlink_port->index = port_index;
6442         devlink_port->registered = true;
6443         spin_lock_init(&devlink_port->type_lock);
6444         list_add_tail(&devlink_port->list, &devlink->port_list);
6445         INIT_LIST_HEAD(&devlink_port->param_list);
6446         mutex_unlock(&devlink->lock);
6447         INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
6448         devlink_port_type_warn_schedule(devlink_port);
6449         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
6450         return 0;
6451 }
6452 EXPORT_SYMBOL_GPL(devlink_port_register);
6453
6454 /**
6455  *      devlink_port_unregister - Unregister devlink port
6456  *
6457  *      @devlink_port: devlink port
6458  */
6459 void devlink_port_unregister(struct devlink_port *devlink_port)
6460 {
6461         struct devlink *devlink = devlink_port->devlink;
6462
6463         devlink_port_type_warn_cancel(devlink_port);
6464         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
6465         mutex_lock(&devlink->lock);
6466         list_del(&devlink_port->list);
6467         mutex_unlock(&devlink->lock);
6468 }
6469 EXPORT_SYMBOL_GPL(devlink_port_unregister);
6470
6471 static void __devlink_port_type_set(struct devlink_port *devlink_port,
6472                                     enum devlink_port_type type,
6473                                     void *type_dev)
6474 {
6475         if (WARN_ON(!devlink_port->registered))
6476                 return;
6477         devlink_port_type_warn_cancel(devlink_port);
6478         spin_lock_bh(&devlink_port->type_lock);
6479         devlink_port->type = type;
6480         devlink_port->type_dev = type_dev;
6481         spin_unlock_bh(&devlink_port->type_lock);
6482         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
6483 }
6484
6485 /**
6486  *      devlink_port_type_eth_set - Set port type to Ethernet
6487  *
6488  *      @devlink_port: devlink port
6489  *      @netdev: related netdevice
6490  */
6491 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
6492                                struct net_device *netdev)
6493 {
6494         const struct net_device_ops *ops = netdev->netdev_ops;
6495
6496         /* If driver registers devlink port, it should set devlink port
6497          * attributes accordingly so the compat functions are called
6498          * and the original ops are not used.
6499          */
6500         if (ops->ndo_get_phys_port_name) {
6501                 /* Some drivers use the same set of ndos for netdevs
6502                  * that have devlink_port registered and also for
6503                  * those who don't. Make sure that ndo_get_phys_port_name
6504                  * returns -EOPNOTSUPP here in case it is defined.
6505                  * Warn if not.
6506                  */
6507                 char name[IFNAMSIZ];
6508                 int err;
6509
6510                 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
6511                 WARN_ON(err != -EOPNOTSUPP);
6512         }
6513         if (ops->ndo_get_port_parent_id) {
6514                 /* Some drivers use the same set of ndos for netdevs
6515                  * that have devlink_port registered and also for
6516                  * those who don't. Make sure that ndo_get_port_parent_id
6517                  * returns -EOPNOTSUPP here in case it is defined.
6518                  * Warn if not.
6519                  */
6520                 struct netdev_phys_item_id ppid;
6521                 int err;
6522
6523                 err = ops->ndo_get_port_parent_id(netdev, &ppid);
6524                 WARN_ON(err != -EOPNOTSUPP);
6525         }
6526         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, netdev);
6527 }
6528 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
6529
6530 /**
6531  *      devlink_port_type_ib_set - Set port type to InfiniBand
6532  *
6533  *      @devlink_port: devlink port
6534  *      @ibdev: related IB device
6535  */
6536 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
6537                               struct ib_device *ibdev)
6538 {
6539         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
6540 }
6541 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
6542
6543 /**
6544  *      devlink_port_type_clear - Clear port type
6545  *
6546  *      @devlink_port: devlink port
6547  */
6548 void devlink_port_type_clear(struct devlink_port *devlink_port)
6549 {
6550         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
6551         devlink_port_type_warn_schedule(devlink_port);
6552 }
6553 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
6554
6555 static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
6556                                     enum devlink_port_flavour flavour,
6557                                     const unsigned char *switch_id,
6558                                     unsigned char switch_id_len)
6559 {
6560         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6561
6562         if (WARN_ON(devlink_port->registered))
6563                 return -EEXIST;
6564         attrs->set = true;
6565         attrs->flavour = flavour;
6566         if (switch_id) {
6567                 attrs->switch_port = true;
6568                 if (WARN_ON(switch_id_len > MAX_PHYS_ITEM_ID_LEN))
6569                         switch_id_len = MAX_PHYS_ITEM_ID_LEN;
6570                 memcpy(attrs->switch_id.id, switch_id, switch_id_len);
6571                 attrs->switch_id.id_len = switch_id_len;
6572         } else {
6573                 attrs->switch_port = false;
6574         }
6575         return 0;
6576 }
6577
6578 /**
6579  *      devlink_port_attrs_set - Set port attributes
6580  *
6581  *      @devlink_port: devlink port
6582  *      @flavour: flavour of the port
6583  *      @port_number: number of the port that is facing user, for example
6584  *                    the front panel port number
6585  *      @split: indicates if this is split port
6586  *      @split_subport_number: if the port is split, this is the number
6587  *                             of subport.
6588  *      @switch_id: if the port is part of switch, this is buffer with ID,
6589  *                  otwerwise this is NULL
6590  *      @switch_id_len: length of the switch_id buffer
6591  */
6592 void devlink_port_attrs_set(struct devlink_port *devlink_port,
6593                             enum devlink_port_flavour flavour,
6594                             u32 port_number, bool split,
6595                             u32 split_subport_number,
6596                             const unsigned char *switch_id,
6597                             unsigned char switch_id_len)
6598 {
6599         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6600         int ret;
6601
6602         ret = __devlink_port_attrs_set(devlink_port, flavour,
6603                                        switch_id, switch_id_len);
6604         if (ret)
6605                 return;
6606         attrs->split = split;
6607         attrs->phys.port_number = port_number;
6608         attrs->phys.split_subport_number = split_subport_number;
6609 }
6610 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
6611
6612 /**
6613  *      devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
6614  *
6615  *      @devlink_port: devlink port
6616  *      @pf: associated PF for the devlink port instance
6617  *      @switch_id: if the port is part of switch, this is buffer with ID,
6618  *                  otherwise this is NULL
6619  *      @switch_id_len: length of the switch_id buffer
6620  */
6621 void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port,
6622                                    const unsigned char *switch_id,
6623                                    unsigned char switch_id_len, u16 pf)
6624 {
6625         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6626         int ret;
6627
6628         ret = __devlink_port_attrs_set(devlink_port,
6629                                        DEVLINK_PORT_FLAVOUR_PCI_PF,
6630                                        switch_id, switch_id_len);
6631         if (ret)
6632                 return;
6633
6634         attrs->pci_pf.pf = pf;
6635 }
6636 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
6637
6638 /**
6639  *      devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
6640  *
6641  *      @devlink_port: devlink port
6642  *      @pf: associated PF for the devlink port instance
6643  *      @vf: associated VF of a PF for the devlink port instance
6644  *      @switch_id: if the port is part of switch, this is buffer with ID,
6645  *                  otherwise this is NULL
6646  *      @switch_id_len: length of the switch_id buffer
6647  */
6648 void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port,
6649                                    const unsigned char *switch_id,
6650                                    unsigned char switch_id_len,
6651                                    u16 pf, u16 vf)
6652 {
6653         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6654         int ret;
6655
6656         ret = __devlink_port_attrs_set(devlink_port,
6657                                        DEVLINK_PORT_FLAVOUR_PCI_VF,
6658                                        switch_id, switch_id_len);
6659         if (ret)
6660                 return;
6661         attrs->pci_vf.pf = pf;
6662         attrs->pci_vf.vf = vf;
6663 }
6664 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
6665
6666 static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
6667                                              char *name, size_t len)
6668 {
6669         struct devlink_port_attrs *attrs = &devlink_port->attrs;
6670         int n = 0;
6671
6672         if (!attrs->set)
6673                 return -EOPNOTSUPP;
6674
6675         switch (attrs->flavour) {
6676         case DEVLINK_PORT_FLAVOUR_PHYSICAL:
6677                 if (!attrs->split)
6678                         n = snprintf(name, len, "p%u", attrs->phys.port_number);
6679                 else
6680                         n = snprintf(name, len, "p%us%u",
6681                                      attrs->phys.port_number,
6682                                      attrs->phys.split_subport_number);
6683                 break;
6684         case DEVLINK_PORT_FLAVOUR_CPU:
6685         case DEVLINK_PORT_FLAVOUR_DSA:
6686                 /* As CPU and DSA ports do not have a netdevice associated
6687                  * case should not ever happen.
6688                  */
6689                 WARN_ON(1);
6690                 return -EINVAL;
6691         case DEVLINK_PORT_FLAVOUR_PCI_PF:
6692                 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
6693                 break;
6694         case DEVLINK_PORT_FLAVOUR_PCI_VF:
6695                 n = snprintf(name, len, "pf%uvf%u",
6696                              attrs->pci_vf.pf, attrs->pci_vf.vf);
6697                 break;
6698         }
6699
6700         if (n >= len)
6701                 return -EINVAL;
6702
6703         return 0;
6704 }
6705
6706 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
6707                         u32 size, u16 ingress_pools_count,
6708                         u16 egress_pools_count, u16 ingress_tc_count,
6709                         u16 egress_tc_count)
6710 {
6711         struct devlink_sb *devlink_sb;
6712         int err = 0;
6713
6714         mutex_lock(&devlink->lock);
6715         if (devlink_sb_index_exists(devlink, sb_index)) {
6716                 err = -EEXIST;
6717                 goto unlock;
6718         }
6719
6720         devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
6721         if (!devlink_sb) {
6722                 err = -ENOMEM;
6723                 goto unlock;
6724         }
6725         devlink_sb->index = sb_index;
6726         devlink_sb->size = size;
6727         devlink_sb->ingress_pools_count = ingress_pools_count;
6728         devlink_sb->egress_pools_count = egress_pools_count;
6729         devlink_sb->ingress_tc_count = ingress_tc_count;
6730         devlink_sb->egress_tc_count = egress_tc_count;
6731         list_add_tail(&devlink_sb->list, &devlink->sb_list);
6732 unlock:
6733         mutex_unlock(&devlink->lock);
6734         return err;
6735 }
6736 EXPORT_SYMBOL_GPL(devlink_sb_register);
6737
6738 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
6739 {
6740         struct devlink_sb *devlink_sb;
6741
6742         mutex_lock(&devlink->lock);
6743         devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
6744         WARN_ON(!devlink_sb);
6745         list_del(&devlink_sb->list);
6746         mutex_unlock(&devlink->lock);
6747         kfree(devlink_sb);
6748 }
6749 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
6750
6751 /**
6752  *      devlink_dpipe_headers_register - register dpipe headers
6753  *
6754  *      @devlink: devlink
6755  *      @dpipe_headers: dpipe header array
6756  *
6757  *      Register the headers supported by hardware.
6758  */
6759 int devlink_dpipe_headers_register(struct devlink *devlink,
6760                                    struct devlink_dpipe_headers *dpipe_headers)
6761 {
6762         mutex_lock(&devlink->lock);
6763         devlink->dpipe_headers = dpipe_headers;
6764         mutex_unlock(&devlink->lock);
6765         return 0;
6766 }
6767 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
6768
6769 /**
6770  *      devlink_dpipe_headers_unregister - unregister dpipe headers
6771  *
6772  *      @devlink: devlink
6773  *
6774  *      Unregister the headers supported by hardware.
6775  */
6776 void devlink_dpipe_headers_unregister(struct devlink *devlink)
6777 {
6778         mutex_lock(&devlink->lock);
6779         devlink->dpipe_headers = NULL;
6780         mutex_unlock(&devlink->lock);
6781 }
6782 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
6783
6784 /**
6785  *      devlink_dpipe_table_counter_enabled - check if counter allocation
6786  *                                            required
6787  *      @devlink: devlink
6788  *      @table_name: tables name
6789  *
6790  *      Used by driver to check if counter allocation is required.
6791  *      After counter allocation is turned on the table entries
6792  *      are updated to include counter statistics.
6793  *
6794  *      After that point on the driver must respect the counter
6795  *      state so that each entry added to the table is added
6796  *      with a counter.
6797  */
6798 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
6799                                          const char *table_name)
6800 {
6801         struct devlink_dpipe_table *table;
6802         bool enabled;
6803
6804         rcu_read_lock();
6805         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
6806                                          table_name);
6807         enabled = false;
6808         if (table)
6809                 enabled = table->counters_enabled;
6810         rcu_read_unlock();
6811         return enabled;
6812 }
6813 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
6814
6815 /**
6816  *      devlink_dpipe_table_register - register dpipe table
6817  *
6818  *      @devlink: devlink
6819  *      @table_name: table name
6820  *      @table_ops: table ops
6821  *      @priv: priv
6822  *      @counter_control_extern: external control for counters
6823  */
6824 int devlink_dpipe_table_register(struct devlink *devlink,
6825                                  const char *table_name,
6826                                  struct devlink_dpipe_table_ops *table_ops,
6827                                  void *priv, bool counter_control_extern)
6828 {
6829         struct devlink_dpipe_table *table;
6830
6831         if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name))
6832                 return -EEXIST;
6833
6834         if (WARN_ON(!table_ops->size_get))
6835                 return -EINVAL;
6836
6837         table = kzalloc(sizeof(*table), GFP_KERNEL);
6838         if (!table)
6839                 return -ENOMEM;
6840
6841         table->name = table_name;
6842         table->table_ops = table_ops;
6843         table->priv = priv;
6844         table->counter_control_extern = counter_control_extern;
6845
6846         mutex_lock(&devlink->lock);
6847         list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
6848         mutex_unlock(&devlink->lock);
6849         return 0;
6850 }
6851 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
6852
6853 /**
6854  *      devlink_dpipe_table_unregister - unregister dpipe table
6855  *
6856  *      @devlink: devlink
6857  *      @table_name: table name
6858  */
6859 void devlink_dpipe_table_unregister(struct devlink *devlink,
6860                                     const char *table_name)
6861 {
6862         struct devlink_dpipe_table *table;
6863
6864         mutex_lock(&devlink->lock);
6865         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
6866                                          table_name);
6867         if (!table)
6868                 goto unlock;
6869         list_del_rcu(&table->list);
6870         mutex_unlock(&devlink->lock);
6871         kfree_rcu(table, rcu);
6872         return;
6873 unlock:
6874         mutex_unlock(&devlink->lock);
6875 }
6876 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
6877
6878 /**
6879  *      devlink_resource_register - devlink resource register
6880  *
6881  *      @devlink: devlink
6882  *      @resource_name: resource's name
6883  *      @resource_size: resource's size
6884  *      @resource_id: resource's id
6885  *      @parent_resource_id: resource's parent id
6886  *      @size_params: size parameters
6887  */
6888 int devlink_resource_register(struct devlink *devlink,
6889                               const char *resource_name,
6890                               u64 resource_size,
6891                               u64 resource_id,
6892                               u64 parent_resource_id,
6893                               const struct devlink_resource_size_params *size_params)
6894 {
6895         struct devlink_resource *resource;
6896         struct list_head *resource_list;
6897         bool top_hierarchy;
6898         int err = 0;
6899
6900         top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
6901
6902         mutex_lock(&devlink->lock);
6903         resource = devlink_resource_find(devlink, NULL, resource_id);
6904         if (resource) {
6905                 err = -EINVAL;
6906                 goto out;
6907         }
6908
6909         resource = kzalloc(sizeof(*resource), GFP_KERNEL);
6910         if (!resource) {
6911                 err = -ENOMEM;
6912                 goto out;
6913         }
6914
6915         if (top_hierarchy) {
6916                 resource_list = &devlink->resource_list;
6917         } else {
6918                 struct devlink_resource *parent_resource;
6919
6920                 parent_resource = devlink_resource_find(devlink, NULL,
6921                                                         parent_resource_id);
6922                 if (parent_resource) {
6923                         resource_list = &parent_resource->resource_list;
6924                         resource->parent = parent_resource;
6925                 } else {
6926                         kfree(resource);
6927                         err = -EINVAL;
6928                         goto out;
6929                 }
6930         }
6931
6932         resource->name = resource_name;
6933         resource->size = resource_size;
6934         resource->size_new = resource_size;
6935         resource->id = resource_id;
6936         resource->size_valid = true;
6937         memcpy(&resource->size_params, size_params,
6938                sizeof(resource->size_params));
6939         INIT_LIST_HEAD(&resource->resource_list);
6940         list_add_tail(&resource->list, resource_list);
6941 out:
6942         mutex_unlock(&devlink->lock);
6943         return err;
6944 }
6945 EXPORT_SYMBOL_GPL(devlink_resource_register);
6946
6947 /**
6948  *      devlink_resources_unregister - free all resources
6949  *
6950  *      @devlink: devlink
6951  *      @resource: resource
6952  */
6953 void devlink_resources_unregister(struct devlink *devlink,
6954                                   struct devlink_resource *resource)
6955 {
6956         struct devlink_resource *tmp, *child_resource;
6957         struct list_head *resource_list;
6958
6959         if (resource)
6960                 resource_list = &resource->resource_list;
6961         else
6962                 resource_list = &devlink->resource_list;
6963
6964         if (!resource)
6965                 mutex_lock(&devlink->lock);
6966
6967         list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
6968                 devlink_resources_unregister(devlink, child_resource);
6969                 list_del(&child_resource->list);
6970                 kfree(child_resource);
6971         }
6972
6973         if (!resource)
6974                 mutex_unlock(&devlink->lock);
6975 }
6976 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
6977
6978 /**
6979  *      devlink_resource_size_get - get and update size
6980  *
6981  *      @devlink: devlink
6982  *      @resource_id: the requested resource id
6983  *      @p_resource_size: ptr to update
6984  */
6985 int devlink_resource_size_get(struct devlink *devlink,
6986                               u64 resource_id,
6987                               u64 *p_resource_size)
6988 {
6989         struct devlink_resource *resource;
6990         int err = 0;
6991
6992         mutex_lock(&devlink->lock);
6993         resource = devlink_resource_find(devlink, NULL, resource_id);
6994         if (!resource) {
6995                 err = -EINVAL;
6996                 goto out;
6997         }
6998         *p_resource_size = resource->size_new;
6999         resource->size = resource->size_new;
7000 out:
7001         mutex_unlock(&devlink->lock);
7002         return err;
7003 }
7004 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
7005
7006 /**
7007  *      devlink_dpipe_table_resource_set - set the resource id
7008  *
7009  *      @devlink: devlink
7010  *      @table_name: table name
7011  *      @resource_id: resource id
7012  *      @resource_units: number of resource's units consumed per table's entry
7013  */
7014 int devlink_dpipe_table_resource_set(struct devlink *devlink,
7015                                      const char *table_name, u64 resource_id,
7016                                      u64 resource_units)
7017 {
7018         struct devlink_dpipe_table *table;
7019         int err = 0;
7020
7021         mutex_lock(&devlink->lock);
7022         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
7023                                          table_name);
7024         if (!table) {
7025                 err = -EINVAL;
7026                 goto out;
7027         }
7028         table->resource_id = resource_id;
7029         table->resource_units = resource_units;
7030         table->resource_valid = true;
7031 out:
7032         mutex_unlock(&devlink->lock);
7033         return err;
7034 }
7035 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
7036
7037 /**
7038  *      devlink_resource_occ_get_register - register occupancy getter
7039  *
7040  *      @devlink: devlink
7041  *      @resource_id: resource id
7042  *      @occ_get: occupancy getter callback
7043  *      @occ_get_priv: occupancy getter callback priv
7044  */
7045 void devlink_resource_occ_get_register(struct devlink *devlink,
7046                                        u64 resource_id,
7047                                        devlink_resource_occ_get_t *occ_get,
7048                                        void *occ_get_priv)
7049 {
7050         struct devlink_resource *resource;
7051
7052         mutex_lock(&devlink->lock);
7053         resource = devlink_resource_find(devlink, NULL, resource_id);
7054         if (WARN_ON(!resource))
7055                 goto out;
7056         WARN_ON(resource->occ_get);
7057
7058         resource->occ_get = occ_get;
7059         resource->occ_get_priv = occ_get_priv;
7060 out:
7061         mutex_unlock(&devlink->lock);
7062 }
7063 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
7064
7065 /**
7066  *      devlink_resource_occ_get_unregister - unregister occupancy getter
7067  *
7068  *      @devlink: devlink
7069  *      @resource_id: resource id
7070  */
7071 void devlink_resource_occ_get_unregister(struct devlink *devlink,
7072                                          u64 resource_id)
7073 {
7074         struct devlink_resource *resource;
7075
7076         mutex_lock(&devlink->lock);
7077         resource = devlink_resource_find(devlink, NULL, resource_id);
7078         if (WARN_ON(!resource))
7079                 goto out;
7080         WARN_ON(!resource->occ_get);
7081
7082         resource->occ_get = NULL;
7083         resource->occ_get_priv = NULL;
7084 out:
7085         mutex_unlock(&devlink->lock);
7086 }
7087 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
7088
7089 static int devlink_param_verify(const struct devlink_param *param)
7090 {
7091         if (!param || !param->name || !param->supported_cmodes)
7092                 return -EINVAL;
7093         if (param->generic)
7094                 return devlink_param_generic_verify(param);
7095         else
7096                 return devlink_param_driver_verify(param);
7097 }
7098
7099 static int __devlink_params_register(struct devlink *devlink,
7100                                      unsigned int port_index,
7101                                      struct list_head *param_list,
7102                                      const struct devlink_param *params,
7103                                      size_t params_count,
7104                                      enum devlink_command reg_cmd,
7105                                      enum devlink_command unreg_cmd)
7106 {
7107         const struct devlink_param *param = params;
7108         int i;
7109         int err;
7110
7111         mutex_lock(&devlink->lock);
7112         for (i = 0; i < params_count; i++, param++) {
7113                 err = devlink_param_verify(param);
7114                 if (err)
7115                         goto rollback;
7116
7117                 err = devlink_param_register_one(devlink, port_index,
7118                                                  param_list, param, reg_cmd);
7119                 if (err)
7120                         goto rollback;
7121         }
7122
7123         mutex_unlock(&devlink->lock);
7124         return 0;
7125
7126 rollback:
7127         if (!i)
7128                 goto unlock;
7129         for (param--; i > 0; i--, param--)
7130                 devlink_param_unregister_one(devlink, port_index, param_list,
7131                                              param, unreg_cmd);
7132 unlock:
7133         mutex_unlock(&devlink->lock);
7134         return err;
7135 }
7136
7137 static void __devlink_params_unregister(struct devlink *devlink,
7138                                         unsigned int port_index,
7139                                         struct list_head *param_list,
7140                                         const struct devlink_param *params,
7141                                         size_t params_count,
7142                                         enum devlink_command cmd)
7143 {
7144         const struct devlink_param *param = params;
7145         int i;
7146
7147         mutex_lock(&devlink->lock);
7148         for (i = 0; i < params_count; i++, param++)
7149                 devlink_param_unregister_one(devlink, 0, param_list, param,
7150                                              cmd);
7151         mutex_unlock(&devlink->lock);
7152 }
7153
7154 /**
7155  *      devlink_params_register - register configuration parameters
7156  *
7157  *      @devlink: devlink
7158  *      @params: configuration parameters array
7159  *      @params_count: number of parameters provided
7160  *
7161  *      Register the configuration parameters supported by the driver.
7162  */
7163 int devlink_params_register(struct devlink *devlink,
7164                             const struct devlink_param *params,
7165                             size_t params_count)
7166 {
7167         return __devlink_params_register(devlink, 0, &devlink->param_list,
7168                                          params, params_count,
7169                                          DEVLINK_CMD_PARAM_NEW,
7170                                          DEVLINK_CMD_PARAM_DEL);
7171 }
7172 EXPORT_SYMBOL_GPL(devlink_params_register);
7173
7174 /**
7175  *      devlink_params_unregister - unregister configuration parameters
7176  *      @devlink: devlink
7177  *      @params: configuration parameters to unregister
7178  *      @params_count: number of parameters provided
7179  */
7180 void devlink_params_unregister(struct devlink *devlink,
7181                                const struct devlink_param *params,
7182                                size_t params_count)
7183 {
7184         return __devlink_params_unregister(devlink, 0, &devlink->param_list,
7185                                            params, params_count,
7186                                            DEVLINK_CMD_PARAM_DEL);
7187 }
7188 EXPORT_SYMBOL_GPL(devlink_params_unregister);
7189
7190 /**
7191  *      devlink_params_publish - publish configuration parameters
7192  *
7193  *      @devlink: devlink
7194  *
7195  *      Publish previously registered configuration parameters.
7196  */
7197 void devlink_params_publish(struct devlink *devlink)
7198 {
7199         struct devlink_param_item *param_item;
7200
7201         list_for_each_entry(param_item, &devlink->param_list, list) {
7202                 if (param_item->published)
7203                         continue;
7204                 param_item->published = true;
7205                 devlink_param_notify(devlink, 0, param_item,
7206                                      DEVLINK_CMD_PARAM_NEW);
7207         }
7208 }
7209 EXPORT_SYMBOL_GPL(devlink_params_publish);
7210
7211 /**
7212  *      devlink_params_unpublish - unpublish configuration parameters
7213  *
7214  *      @devlink: devlink
7215  *
7216  *      Unpublish previously registered configuration parameters.
7217  */
7218 void devlink_params_unpublish(struct devlink *devlink)
7219 {
7220         struct devlink_param_item *param_item;
7221
7222         list_for_each_entry(param_item, &devlink->param_list, list) {
7223                 if (!param_item->published)
7224                         continue;
7225                 param_item->published = false;
7226                 devlink_param_notify(devlink, 0, param_item,
7227                                      DEVLINK_CMD_PARAM_DEL);
7228         }
7229 }
7230 EXPORT_SYMBOL_GPL(devlink_params_unpublish);
7231
7232 /**
7233  *      devlink_port_params_register - register port configuration parameters
7234  *
7235  *      @devlink_port: devlink port
7236  *      @params: configuration parameters array
7237  *      @params_count: number of parameters provided
7238  *
7239  *      Register the configuration parameters supported by the port.
7240  */
7241 int devlink_port_params_register(struct devlink_port *devlink_port,
7242                                  const struct devlink_param *params,
7243                                  size_t params_count)
7244 {
7245         return __devlink_params_register(devlink_port->devlink,
7246                                          devlink_port->index,
7247                                          &devlink_port->param_list, params,
7248                                          params_count,
7249                                          DEVLINK_CMD_PORT_PARAM_NEW,
7250                                          DEVLINK_CMD_PORT_PARAM_DEL);
7251 }
7252 EXPORT_SYMBOL_GPL(devlink_port_params_register);
7253
7254 /**
7255  *      devlink_port_params_unregister - unregister port configuration
7256  *      parameters
7257  *
7258  *      @devlink_port: devlink port
7259  *      @params: configuration parameters array
7260  *      @params_count: number of parameters provided
7261  */
7262 void devlink_port_params_unregister(struct devlink_port *devlink_port,
7263                                     const struct devlink_param *params,
7264                                     size_t params_count)
7265 {
7266         return __devlink_params_unregister(devlink_port->devlink,
7267                                            devlink_port->index,
7268                                            &devlink_port->param_list,
7269                                            params, params_count,
7270                                            DEVLINK_CMD_PORT_PARAM_DEL);
7271 }
7272 EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
7273
7274 static int
7275 __devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
7276                                      union devlink_param_value *init_val)
7277 {
7278         struct devlink_param_item *param_item;
7279
7280         param_item = devlink_param_find_by_id(param_list, param_id);
7281         if (!param_item)
7282                 return -EINVAL;
7283
7284         if (!param_item->driverinit_value_valid ||
7285             !devlink_param_cmode_is_supported(param_item->param,
7286                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
7287                 return -EOPNOTSUPP;
7288
7289         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
7290                 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
7291         else
7292                 *init_val = param_item->driverinit_value;
7293
7294         return 0;
7295 }
7296
7297 static int
7298 __devlink_param_driverinit_value_set(struct devlink *devlink,
7299                                      unsigned int port_index,
7300                                      struct list_head *param_list, u32 param_id,
7301                                      union devlink_param_value init_val,
7302                                      enum devlink_command cmd)
7303 {
7304         struct devlink_param_item *param_item;
7305
7306         param_item = devlink_param_find_by_id(param_list, param_id);
7307         if (!param_item)
7308                 return -EINVAL;
7309
7310         if (!devlink_param_cmode_is_supported(param_item->param,
7311                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
7312                 return -EOPNOTSUPP;
7313
7314         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
7315                 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
7316         else
7317                 param_item->driverinit_value = init_val;
7318         param_item->driverinit_value_valid = true;
7319
7320         devlink_param_notify(devlink, port_index, param_item, cmd);
7321         return 0;
7322 }
7323
7324 /**
7325  *      devlink_param_driverinit_value_get - get configuration parameter
7326  *                                           value for driver initializing
7327  *
7328  *      @devlink: devlink
7329  *      @param_id: parameter ID
7330  *      @init_val: value of parameter in driverinit configuration mode
7331  *
7332  *      This function should be used by the driver to get driverinit
7333  *      configuration for initialization after reload command.
7334  */
7335 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
7336                                        union devlink_param_value *init_val)
7337 {
7338         if (!devlink_reload_supported(devlink))
7339                 return -EOPNOTSUPP;
7340
7341         return __devlink_param_driverinit_value_get(&devlink->param_list,
7342                                                     param_id, init_val);
7343 }
7344 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
7345
7346 /**
7347  *      devlink_param_driverinit_value_set - set value of configuration
7348  *                                           parameter for driverinit
7349  *                                           configuration mode
7350  *
7351  *      @devlink: devlink
7352  *      @param_id: parameter ID
7353  *      @init_val: value of parameter to set for driverinit configuration mode
7354  *
7355  *      This function should be used by the driver to set driverinit
7356  *      configuration mode default value.
7357  */
7358 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
7359                                        union devlink_param_value init_val)
7360 {
7361         return __devlink_param_driverinit_value_set(devlink, 0,
7362                                                     &devlink->param_list,
7363                                                     param_id, init_val,
7364                                                     DEVLINK_CMD_PARAM_NEW);
7365 }
7366 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
7367
7368 /**
7369  *      devlink_port_param_driverinit_value_get - get configuration parameter
7370  *                                              value for driver initializing
7371  *
7372  *      @devlink_port: devlink_port
7373  *      @param_id: parameter ID
7374  *      @init_val: value of parameter in driverinit configuration mode
7375  *
7376  *      This function should be used by the driver to get driverinit
7377  *      configuration for initialization after reload command.
7378  */
7379 int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port,
7380                                             u32 param_id,
7381                                             union devlink_param_value *init_val)
7382 {
7383         struct devlink *devlink = devlink_port->devlink;
7384
7385         if (!devlink_reload_supported(devlink))
7386                 return -EOPNOTSUPP;
7387
7388         return __devlink_param_driverinit_value_get(&devlink_port->param_list,
7389                                                     param_id, init_val);
7390 }
7391 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get);
7392
7393 /**
7394  *     devlink_port_param_driverinit_value_set - set value of configuration
7395  *                                               parameter for driverinit
7396  *                                               configuration mode
7397  *
7398  *     @devlink_port: devlink_port
7399  *     @param_id: parameter ID
7400  *     @init_val: value of parameter to set for driverinit configuration mode
7401  *
7402  *     This function should be used by the driver to set driverinit
7403  *     configuration mode default value.
7404  */
7405 int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
7406                                             u32 param_id,
7407                                             union devlink_param_value init_val)
7408 {
7409         return __devlink_param_driverinit_value_set(devlink_port->devlink,
7410                                                     devlink_port->index,
7411                                                     &devlink_port->param_list,
7412                                                     param_id, init_val,
7413                                                     DEVLINK_CMD_PORT_PARAM_NEW);
7414 }
7415 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
7416
7417 /**
7418  *      devlink_param_value_changed - notify devlink on a parameter's value
7419  *                                    change. Should be called by the driver
7420  *                                    right after the change.
7421  *
7422  *      @devlink: devlink
7423  *      @param_id: parameter ID
7424  *
7425  *      This function should be used by the driver to notify devlink on value
7426  *      change, excluding driverinit configuration mode.
7427  *      For driverinit configuration mode driver should use the function
7428  */
7429 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
7430 {
7431         struct devlink_param_item *param_item;
7432
7433         param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
7434         WARN_ON(!param_item);
7435
7436         devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
7437 }
7438 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
7439
7440 /**
7441  *     devlink_port_param_value_changed - notify devlink on a parameter's value
7442  *                                      change. Should be called by the driver
7443  *                                      right after the change.
7444  *
7445  *     @devlink_port: devlink_port
7446  *     @param_id: parameter ID
7447  *
7448  *     This function should be used by the driver to notify devlink on value
7449  *     change, excluding driverinit configuration mode.
7450  *     For driverinit configuration mode driver should use the function
7451  *     devlink_port_param_driverinit_value_set() instead.
7452  */
7453 void devlink_port_param_value_changed(struct devlink_port *devlink_port,
7454                                       u32 param_id)
7455 {
7456         struct devlink_param_item *param_item;
7457
7458         param_item = devlink_param_find_by_id(&devlink_port->param_list,
7459                                               param_id);
7460         WARN_ON(!param_item);
7461
7462         devlink_param_notify(devlink_port->devlink, devlink_port->index,
7463                              param_item, DEVLINK_CMD_PORT_PARAM_NEW);
7464 }
7465 EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
7466
7467 /**
7468  *      devlink_param_value_str_fill - Safely fill-up the string preventing
7469  *                                     from overflow of the preallocated buffer
7470  *
7471  *      @dst_val: destination devlink_param_value
7472  *      @src: source buffer
7473  */
7474 void devlink_param_value_str_fill(union devlink_param_value *dst_val,
7475                                   const char *src)
7476 {
7477         size_t len;
7478
7479         len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
7480         WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
7481 }
7482 EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
7483
7484 /**
7485  *      devlink_region_create - create a new address region
7486  *
7487  *      @devlink: devlink
7488  *      @region_name: region name
7489  *      @region_max_snapshots: Maximum supported number of snapshots for region
7490  *      @region_size: size of region
7491  */
7492 struct devlink_region *devlink_region_create(struct devlink *devlink,
7493                                              const char *region_name,
7494                                              u32 region_max_snapshots,
7495                                              u64 region_size)
7496 {
7497         struct devlink_region *region;
7498         int err = 0;
7499
7500         mutex_lock(&devlink->lock);
7501
7502         if (devlink_region_get_by_name(devlink, region_name)) {
7503                 err = -EEXIST;
7504                 goto unlock;
7505         }
7506
7507         region = kzalloc(sizeof(*region), GFP_KERNEL);
7508         if (!region) {
7509                 err = -ENOMEM;
7510                 goto unlock;
7511         }
7512
7513         region->devlink = devlink;
7514         region->max_snapshots = region_max_snapshots;
7515         region->name = region_name;
7516         region->size = region_size;
7517         INIT_LIST_HEAD(&region->snapshot_list);
7518         list_add_tail(&region->list, &devlink->region_list);
7519         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
7520
7521         mutex_unlock(&devlink->lock);
7522         return region;
7523
7524 unlock:
7525         mutex_unlock(&devlink->lock);
7526         return ERR_PTR(err);
7527 }
7528 EXPORT_SYMBOL_GPL(devlink_region_create);
7529
7530 /**
7531  *      devlink_region_destroy - destroy address region
7532  *
7533  *      @region: devlink region to destroy
7534  */
7535 void devlink_region_destroy(struct devlink_region *region)
7536 {
7537         struct devlink *devlink = region->devlink;
7538         struct devlink_snapshot *snapshot, *ts;
7539
7540         mutex_lock(&devlink->lock);
7541
7542         /* Free all snapshots of region */
7543         list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
7544                 devlink_region_snapshot_del(region, snapshot);
7545
7546         list_del(&region->list);
7547
7548         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
7549         mutex_unlock(&devlink->lock);
7550         kfree(region);
7551 }
7552 EXPORT_SYMBOL_GPL(devlink_region_destroy);
7553
7554 /**
7555  *      devlink_region_shapshot_id_get - get snapshot ID
7556  *
7557  *      This callback should be called when adding a new snapshot,
7558  *      Driver should use the same id for multiple snapshots taken
7559  *      on multiple regions at the same time/by the same trigger.
7560  *
7561  *      @devlink: devlink
7562  */
7563 u32 devlink_region_shapshot_id_get(struct devlink *devlink)
7564 {
7565         u32 id;
7566
7567         mutex_lock(&devlink->lock);
7568         id = ++devlink->snapshot_id;
7569         mutex_unlock(&devlink->lock);
7570
7571         return id;
7572 }
7573 EXPORT_SYMBOL_GPL(devlink_region_shapshot_id_get);
7574
7575 /**
7576  *      devlink_region_snapshot_create - create a new snapshot
7577  *      This will add a new snapshot of a region. The snapshot
7578  *      will be stored on the region struct and can be accessed
7579  *      from devlink. This is useful for future analyses of snapshots.
7580  *      Multiple snapshots can be created on a region.
7581  *      The @snapshot_id should be obtained using the getter function.
7582  *
7583  *      @region: devlink region of the snapshot
7584  *      @data: snapshot data
7585  *      @snapshot_id: snapshot id to be created
7586  *      @data_destructor: pointer to destructor function to free data
7587  */
7588 int devlink_region_snapshot_create(struct devlink_region *region,
7589                                    u8 *data, u32 snapshot_id,
7590                                    devlink_snapshot_data_dest_t *data_destructor)
7591 {
7592         struct devlink *devlink = region->devlink;
7593         struct devlink_snapshot *snapshot;
7594         int err;
7595
7596         mutex_lock(&devlink->lock);
7597
7598         /* check if region can hold one more snapshot */
7599         if (region->cur_snapshots == region->max_snapshots) {
7600                 err = -ENOMEM;
7601                 goto unlock;
7602         }
7603
7604         if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
7605                 err = -EEXIST;
7606                 goto unlock;
7607         }
7608
7609         snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
7610         if (!snapshot) {
7611                 err = -ENOMEM;
7612                 goto unlock;
7613         }
7614
7615         snapshot->id = snapshot_id;
7616         snapshot->region = region;
7617         snapshot->data = data;
7618         snapshot->data_destructor = data_destructor;
7619
7620         list_add_tail(&snapshot->list, &region->snapshot_list);
7621
7622         region->cur_snapshots++;
7623
7624         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
7625         mutex_unlock(&devlink->lock);
7626         return 0;
7627
7628 unlock:
7629         mutex_unlock(&devlink->lock);
7630         return err;
7631 }
7632 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
7633
7634 #define DEVLINK_TRAP(_id, _type)                                              \
7635         {                                                                     \
7636                 .type = DEVLINK_TRAP_TYPE_##_type,                            \
7637                 .id = DEVLINK_TRAP_GENERIC_ID_##_id,                          \
7638                 .name = DEVLINK_TRAP_GENERIC_NAME_##_id,                      \
7639         }
7640
7641 static const struct devlink_trap devlink_trap_generic[] = {
7642         DEVLINK_TRAP(SMAC_MC, DROP),
7643         DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
7644         DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
7645         DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
7646         DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
7647         DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
7648         DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
7649         DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
7650         DEVLINK_TRAP(TAIL_DROP, DROP),
7651         DEVLINK_TRAP(NON_IP_PACKET, DROP),
7652         DEVLINK_TRAP(UC_DIP_MC_DMAC, DROP),
7653         DEVLINK_TRAP(DIP_LB, DROP),
7654         DEVLINK_TRAP(SIP_MC, DROP),
7655         DEVLINK_TRAP(SIP_LB, DROP),
7656         DEVLINK_TRAP(CORRUPTED_IP_HDR, DROP),
7657         DEVLINK_TRAP(IPV4_SIP_BC, DROP),
7658         DEVLINK_TRAP(IPV6_MC_DIP_RESERVED_SCOPE, DROP),
7659         DEVLINK_TRAP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, DROP),
7660         DEVLINK_TRAP(MTU_ERROR, EXCEPTION),
7661         DEVLINK_TRAP(UNRESOLVED_NEIGH, EXCEPTION),
7662         DEVLINK_TRAP(RPF, EXCEPTION),
7663         DEVLINK_TRAP(REJECT_ROUTE, EXCEPTION),
7664         DEVLINK_TRAP(IPV4_LPM_UNICAST_MISS, EXCEPTION),
7665         DEVLINK_TRAP(IPV6_LPM_UNICAST_MISS, EXCEPTION),
7666 };
7667
7668 #define DEVLINK_TRAP_GROUP(_id)                                               \
7669         {                                                                     \
7670                 .id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id,                    \
7671                 .name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id,                \
7672         }
7673
7674 static const struct devlink_trap_group devlink_trap_group_generic[] = {
7675         DEVLINK_TRAP_GROUP(L2_DROPS),
7676         DEVLINK_TRAP_GROUP(L3_DROPS),
7677         DEVLINK_TRAP_GROUP(BUFFER_DROPS),
7678 };
7679
7680 static int devlink_trap_generic_verify(const struct devlink_trap *trap)
7681 {
7682         if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
7683                 return -EINVAL;
7684
7685         if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
7686                 return -EINVAL;
7687
7688         if (trap->type != devlink_trap_generic[trap->id].type)
7689                 return -EINVAL;
7690
7691         return 0;
7692 }
7693
7694 static int devlink_trap_driver_verify(const struct devlink_trap *trap)
7695 {
7696         int i;
7697
7698         if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
7699                 return -EINVAL;
7700
7701         for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
7702                 if (!strcmp(trap->name, devlink_trap_generic[i].name))
7703                         return -EEXIST;
7704         }
7705
7706         return 0;
7707 }
7708
7709 static int devlink_trap_verify(const struct devlink_trap *trap)
7710 {
7711         if (!trap || !trap->name || !trap->group.name)
7712                 return -EINVAL;
7713
7714         if (trap->generic)
7715                 return devlink_trap_generic_verify(trap);
7716         else
7717                 return devlink_trap_driver_verify(trap);
7718 }
7719
7720 static int
7721 devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
7722 {
7723         if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
7724                 return -EINVAL;
7725
7726         if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
7727                 return -EINVAL;
7728
7729         return 0;
7730 }
7731
7732 static int
7733 devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
7734 {
7735         int i;
7736
7737         if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
7738                 return -EINVAL;
7739
7740         for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
7741                 if (!strcmp(group->name, devlink_trap_group_generic[i].name))
7742                         return -EEXIST;
7743         }
7744
7745         return 0;
7746 }
7747
7748 static int devlink_trap_group_verify(const struct devlink_trap_group *group)
7749 {
7750         if (group->generic)
7751                 return devlink_trap_group_generic_verify(group);
7752         else
7753                 return devlink_trap_group_driver_verify(group);
7754 }
7755
7756 static void
7757 devlink_trap_group_notify(struct devlink *devlink,
7758                           const struct devlink_trap_group_item *group_item,
7759                           enum devlink_command cmd)
7760 {
7761         struct sk_buff *msg;
7762         int err;
7763
7764         WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
7765                      cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
7766
7767         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7768         if (!msg)
7769                 return;
7770
7771         err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
7772                                          0);
7773         if (err) {
7774                 nlmsg_free(msg);
7775                 return;
7776         }
7777
7778         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
7779                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
7780 }
7781
7782 static struct devlink_trap_group_item *
7783 devlink_trap_group_item_create(struct devlink *devlink,
7784                                const struct devlink_trap_group *group)
7785 {
7786         struct devlink_trap_group_item *group_item;
7787         int err;
7788
7789         err = devlink_trap_group_verify(group);
7790         if (err)
7791                 return ERR_PTR(err);
7792
7793         group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
7794         if (!group_item)
7795                 return ERR_PTR(-ENOMEM);
7796
7797         group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
7798         if (!group_item->stats) {
7799                 err = -ENOMEM;
7800                 goto err_stats_alloc;
7801         }
7802
7803         group_item->group = group;
7804         refcount_set(&group_item->refcount, 1);
7805
7806         if (devlink->ops->trap_group_init) {
7807                 err = devlink->ops->trap_group_init(devlink, group);
7808                 if (err)
7809                         goto err_group_init;
7810         }
7811
7812         list_add_tail(&group_item->list, &devlink->trap_group_list);
7813         devlink_trap_group_notify(devlink, group_item,
7814                                   DEVLINK_CMD_TRAP_GROUP_NEW);
7815
7816         return group_item;
7817
7818 err_group_init:
7819         free_percpu(group_item->stats);
7820 err_stats_alloc:
7821         kfree(group_item);
7822         return ERR_PTR(err);
7823 }
7824
7825 static void
7826 devlink_trap_group_item_destroy(struct devlink *devlink,
7827                                 struct devlink_trap_group_item *group_item)
7828 {
7829         devlink_trap_group_notify(devlink, group_item,
7830                                   DEVLINK_CMD_TRAP_GROUP_DEL);
7831         list_del(&group_item->list);
7832         free_percpu(group_item->stats);
7833         kfree(group_item);
7834 }
7835
7836 static struct devlink_trap_group_item *
7837 devlink_trap_group_item_get(struct devlink *devlink,
7838                             const struct devlink_trap_group *group)
7839 {
7840         struct devlink_trap_group_item *group_item;
7841
7842         group_item = devlink_trap_group_item_lookup(devlink, group->name);
7843         if (group_item) {
7844                 refcount_inc(&group_item->refcount);
7845                 return group_item;
7846         }
7847
7848         return devlink_trap_group_item_create(devlink, group);
7849 }
7850
7851 static void
7852 devlink_trap_group_item_put(struct devlink *devlink,
7853                             struct devlink_trap_group_item *group_item)
7854 {
7855         if (!refcount_dec_and_test(&group_item->refcount))
7856                 return;
7857
7858         devlink_trap_group_item_destroy(devlink, group_item);
7859 }
7860
7861 static int
7862 devlink_trap_item_group_link(struct devlink *devlink,
7863                              struct devlink_trap_item *trap_item)
7864 {
7865         struct devlink_trap_group_item *group_item;
7866
7867         group_item = devlink_trap_group_item_get(devlink,
7868                                                  &trap_item->trap->group);
7869         if (IS_ERR(group_item))
7870                 return PTR_ERR(group_item);
7871
7872         trap_item->group_item = group_item;
7873
7874         return 0;
7875 }
7876
7877 static void
7878 devlink_trap_item_group_unlink(struct devlink *devlink,
7879                                struct devlink_trap_item *trap_item)
7880 {
7881         devlink_trap_group_item_put(devlink, trap_item->group_item);
7882 }
7883
7884 static void devlink_trap_notify(struct devlink *devlink,
7885                                 const struct devlink_trap_item *trap_item,
7886                                 enum devlink_command cmd)
7887 {
7888         struct sk_buff *msg;
7889         int err;
7890
7891         WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
7892                      cmd != DEVLINK_CMD_TRAP_DEL);
7893
7894         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7895         if (!msg)
7896                 return;
7897
7898         err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
7899         if (err) {
7900                 nlmsg_free(msg);
7901                 return;
7902         }
7903
7904         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
7905                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
7906 }
7907
7908 static int
7909 devlink_trap_register(struct devlink *devlink,
7910                       const struct devlink_trap *trap, void *priv)
7911 {
7912         struct devlink_trap_item *trap_item;
7913         int err;
7914
7915         if (devlink_trap_item_lookup(devlink, trap->name))
7916                 return -EEXIST;
7917
7918         trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
7919         if (!trap_item)
7920                 return -ENOMEM;
7921
7922         trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
7923         if (!trap_item->stats) {
7924                 err = -ENOMEM;
7925                 goto err_stats_alloc;
7926         }
7927
7928         trap_item->trap = trap;
7929         trap_item->action = trap->init_action;
7930         trap_item->priv = priv;
7931
7932         err = devlink_trap_item_group_link(devlink, trap_item);
7933         if (err)
7934                 goto err_group_link;
7935
7936         err = devlink->ops->trap_init(devlink, trap, trap_item);
7937         if (err)
7938                 goto err_trap_init;
7939
7940         list_add_tail(&trap_item->list, &devlink->trap_list);
7941         devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
7942
7943         return 0;
7944
7945 err_trap_init:
7946         devlink_trap_item_group_unlink(devlink, trap_item);
7947 err_group_link:
7948         free_percpu(trap_item->stats);
7949 err_stats_alloc:
7950         kfree(trap_item);
7951         return err;
7952 }
7953
7954 static void devlink_trap_unregister(struct devlink *devlink,
7955                                     const struct devlink_trap *trap)
7956 {
7957         struct devlink_trap_item *trap_item;
7958
7959         trap_item = devlink_trap_item_lookup(devlink, trap->name);
7960         if (WARN_ON_ONCE(!trap_item))
7961                 return;
7962
7963         devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
7964         list_del(&trap_item->list);
7965         if (devlink->ops->trap_fini)
7966                 devlink->ops->trap_fini(devlink, trap, trap_item);
7967         devlink_trap_item_group_unlink(devlink, trap_item);
7968         free_percpu(trap_item->stats);
7969         kfree(trap_item);
7970 }
7971
7972 static void devlink_trap_disable(struct devlink *devlink,
7973                                  const struct devlink_trap *trap)
7974 {
7975         struct devlink_trap_item *trap_item;
7976
7977         trap_item = devlink_trap_item_lookup(devlink, trap->name);
7978         if (WARN_ON_ONCE(!trap_item))
7979                 return;
7980
7981         devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP);
7982         trap_item->action = DEVLINK_TRAP_ACTION_DROP;
7983 }
7984
7985 /**
7986  * devlink_traps_register - Register packet traps with devlink.
7987  * @devlink: devlink.
7988  * @traps: Packet traps.
7989  * @traps_count: Count of provided packet traps.
7990  * @priv: Driver private information.
7991  *
7992  * Return: Non-zero value on failure.
7993  */
7994 int devlink_traps_register(struct devlink *devlink,
7995                            const struct devlink_trap *traps,
7996                            size_t traps_count, void *priv)
7997 {
7998         int i, err;
7999
8000         if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
8001                 return -EINVAL;
8002
8003         mutex_lock(&devlink->lock);
8004         for (i = 0; i < traps_count; i++) {
8005                 const struct devlink_trap *trap = &traps[i];
8006
8007                 err = devlink_trap_verify(trap);
8008                 if (err)
8009                         goto err_trap_verify;
8010
8011                 err = devlink_trap_register(devlink, trap, priv);
8012                 if (err)
8013                         goto err_trap_register;
8014         }
8015         mutex_unlock(&devlink->lock);
8016
8017         return 0;
8018
8019 err_trap_register:
8020 err_trap_verify:
8021         for (i--; i >= 0; i--)
8022                 devlink_trap_unregister(devlink, &traps[i]);
8023         mutex_unlock(&devlink->lock);
8024         return err;
8025 }
8026 EXPORT_SYMBOL_GPL(devlink_traps_register);
8027
8028 /**
8029  * devlink_traps_unregister - Unregister packet traps from devlink.
8030  * @devlink: devlink.
8031  * @traps: Packet traps.
8032  * @traps_count: Count of provided packet traps.
8033  */
8034 void devlink_traps_unregister(struct devlink *devlink,
8035                               const struct devlink_trap *traps,
8036                               size_t traps_count)
8037 {
8038         int i;
8039
8040         mutex_lock(&devlink->lock);
8041         /* Make sure we do not have any packets in-flight while unregistering
8042          * traps by disabling all of them and waiting for a grace period.
8043          */
8044         for (i = traps_count - 1; i >= 0; i--)
8045                 devlink_trap_disable(devlink, &traps[i]);
8046         synchronize_rcu();
8047         for (i = traps_count - 1; i >= 0; i--)
8048                 devlink_trap_unregister(devlink, &traps[i]);
8049         mutex_unlock(&devlink->lock);
8050 }
8051 EXPORT_SYMBOL_GPL(devlink_traps_unregister);
8052
8053 static void
8054 devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
8055                           size_t skb_len)
8056 {
8057         struct devlink_stats *stats;
8058
8059         stats = this_cpu_ptr(trap_stats);
8060         u64_stats_update_begin(&stats->syncp);
8061         stats->rx_bytes += skb_len;
8062         stats->rx_packets++;
8063         u64_stats_update_end(&stats->syncp);
8064 }
8065
8066 static void
8067 devlink_trap_report_metadata_fill(struct net_dm_hw_metadata *hw_metadata,
8068                                   const struct devlink_trap_item *trap_item,
8069                                   struct devlink_port *in_devlink_port)
8070 {
8071         struct devlink_trap_group_item *group_item = trap_item->group_item;
8072
8073         hw_metadata->trap_group_name = group_item->group->name;
8074         hw_metadata->trap_name = trap_item->trap->name;
8075
8076         spin_lock(&in_devlink_port->type_lock);
8077         if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
8078                 hw_metadata->input_dev = in_devlink_port->type_dev;
8079         spin_unlock(&in_devlink_port->type_lock);
8080 }
8081
8082 /**
8083  * devlink_trap_report - Report trapped packet to drop monitor.
8084  * @devlink: devlink.
8085  * @skb: Trapped packet.
8086  * @trap_ctx: Trap context.
8087  * @in_devlink_port: Input devlink port.
8088  */
8089 void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
8090                          void *trap_ctx, struct devlink_port *in_devlink_port)
8091 {
8092         struct devlink_trap_item *trap_item = trap_ctx;
8093         struct net_dm_hw_metadata hw_metadata = {};
8094
8095         devlink_trap_stats_update(trap_item->stats, skb->len);
8096         devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
8097
8098         devlink_trap_report_metadata_fill(&hw_metadata, trap_item,
8099                                           in_devlink_port);
8100         net_dm_hw_report(skb, &hw_metadata);
8101 }
8102 EXPORT_SYMBOL_GPL(devlink_trap_report);
8103
8104 /**
8105  * devlink_trap_ctx_priv - Trap context to driver private information.
8106  * @trap_ctx: Trap context.
8107  *
8108  * Return: Driver private information passed during registration.
8109  */
8110 void *devlink_trap_ctx_priv(void *trap_ctx)
8111 {
8112         struct devlink_trap_item *trap_item = trap_ctx;
8113
8114         return trap_item->priv;
8115 }
8116 EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
8117
8118 static void __devlink_compat_running_version(struct devlink *devlink,
8119                                              char *buf, size_t len)
8120 {
8121         const struct nlattr *nlattr;
8122         struct devlink_info_req req;
8123         struct sk_buff *msg;
8124         int rem, err;
8125
8126         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8127         if (!msg)
8128                 return;
8129
8130         req.msg = msg;
8131         err = devlink->ops->info_get(devlink, &req, NULL);
8132         if (err)
8133                 goto free_msg;
8134
8135         nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
8136                 const struct nlattr *kv;
8137                 int rem_kv;
8138
8139                 if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
8140                         continue;
8141
8142                 nla_for_each_nested(kv, nlattr, rem_kv) {
8143                         if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
8144                                 continue;
8145
8146                         strlcat(buf, nla_data(kv), len);
8147                         strlcat(buf, " ", len);
8148                 }
8149         }
8150 free_msg:
8151         nlmsg_free(msg);
8152 }
8153
8154 void devlink_compat_running_version(struct net_device *dev,
8155                                     char *buf, size_t len)
8156 {
8157         struct devlink *devlink;
8158
8159         dev_hold(dev);
8160         rtnl_unlock();
8161
8162         devlink = netdev_to_devlink(dev);
8163         if (!devlink || !devlink->ops->info_get)
8164                 goto out;
8165
8166         mutex_lock(&devlink->lock);
8167         __devlink_compat_running_version(devlink, buf, len);
8168         mutex_unlock(&devlink->lock);
8169
8170 out:
8171         rtnl_lock();
8172         dev_put(dev);
8173 }
8174
8175 int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
8176 {
8177         struct devlink *devlink;
8178         int ret;
8179
8180         dev_hold(dev);
8181         rtnl_unlock();
8182
8183         devlink = netdev_to_devlink(dev);
8184         if (!devlink || !devlink->ops->flash_update) {
8185                 ret = -EOPNOTSUPP;
8186                 goto out;
8187         }
8188
8189         mutex_lock(&devlink->lock);
8190         ret = devlink->ops->flash_update(devlink, file_name, NULL, NULL);
8191         mutex_unlock(&devlink->lock);
8192
8193 out:
8194         rtnl_lock();
8195         dev_put(dev);
8196
8197         return ret;
8198 }
8199
8200 int devlink_compat_phys_port_name_get(struct net_device *dev,
8201                                       char *name, size_t len)
8202 {
8203         struct devlink_port *devlink_port;
8204
8205         /* RTNL mutex is held here which ensures that devlink_port
8206          * instance cannot disappear in the middle. No need to take
8207          * any devlink lock as only permanent values are accessed.
8208          */
8209         ASSERT_RTNL();
8210
8211         devlink_port = netdev_to_devlink_port(dev);
8212         if (!devlink_port)
8213                 return -EOPNOTSUPP;
8214
8215         return __devlink_port_phys_port_name_get(devlink_port, name, len);
8216 }
8217
8218 int devlink_compat_switch_id_get(struct net_device *dev,
8219                                  struct netdev_phys_item_id *ppid)
8220 {
8221         struct devlink_port *devlink_port;
8222
8223         /* Caller must hold RTNL mutex or reference to dev, which ensures that
8224          * devlink_port instance cannot disappear in the middle. No need to take
8225          * any devlink lock as only permanent values are accessed.
8226          */
8227         devlink_port = netdev_to_devlink_port(dev);
8228         if (!devlink_port || !devlink_port->attrs.switch_port)
8229                 return -EOPNOTSUPP;
8230
8231         memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
8232
8233         return 0;
8234 }
8235
8236 static void __net_exit devlink_pernet_pre_exit(struct net *net)
8237 {
8238         struct devlink *devlink;
8239         int err;
8240
8241         /* In case network namespace is getting destroyed, reload
8242          * all devlink instances from this namespace into init_net.
8243          */
8244         mutex_lock(&devlink_mutex);
8245         list_for_each_entry(devlink, &devlink_list, list) {
8246                 if (net_eq(devlink_net(devlink), net)) {
8247                         if (WARN_ON(!devlink_reload_supported(devlink)))
8248                                 continue;
8249                         err = devlink_reload(devlink, &init_net, NULL);
8250                         if (err && err != -EOPNOTSUPP)
8251                                 pr_warn("Failed to reload devlink instance into init_net\n");
8252                 }
8253         }
8254         mutex_unlock(&devlink_mutex);
8255 }
8256
8257 static struct pernet_operations devlink_pernet_ops __net_initdata = {
8258         .pre_exit = devlink_pernet_pre_exit,
8259 };
8260
8261 static int __init devlink_init(void)
8262 {
8263         int err;
8264
8265         err = genl_register_family(&devlink_nl_family);
8266         if (err)
8267                 goto out;
8268         err = register_pernet_subsys(&devlink_pernet_ops);
8269
8270 out:
8271         WARN_ON(err);
8272         return err;
8273 }
8274
8275 subsys_initcall(devlink_init);